S: Santa Clara, CA 95051
S: USA
+N: Kukjin Kim
+E: kgene@kernel.org
+D: Samsung S3C, S5P and Exynos ARM architectures
+
+N: Sangbeom Kim
+E: sbkim73@samsung.com
+D: Samsung SoC Audio (ASoC) drivers
+D: Samsung PMIC (RTC, regulators, MFD) drivers
+
N: Russell King
E: rmk@arm.linux.org.uk
D: Linux/arm integrator, maintainer & hacker
layout of the files below for details on how to do this.)
obsolete/
- This directory documents interfaces that are still remaining in
+ This directory documents interfaces that are still remaining in
the kernel, but are marked to be removed at some later point in
time. The description of the interface will document the reason
why it is obsolete and when it can be expected to be removed.
be changed further.
+Note:
+ The fields should be use a simple notation, compatible with ReST markup.
+ Also, the file **should not** have a top-level index, like::
+
+ ===
+ foo
+ ===
+
How things move between levels:
Interfaces in stable may move to obsolete, as long as the proper
system. Device DAX is strict, precise and predictable.
Specifically this interface:
- 1/ Guarantees fault granularity with respect to a given
- page size (pte, pmd, or pud) set at configuration time.
+ 1. Guarantees fault granularity with respect to a given
+ page size (pte, pmd, or pud) set at configuration time.
- 2/ Enforces deterministic behavior by being strict about
- what fault scenarios are supported.
+ 2. Enforces deterministic behavior by being strict about
+ what fault scenarios are supported.
The /sys/class/dax/ interface enumerates all the
device-dax instances in the system. The ABI is
setting reported by the mouse. This number has to be further
processed to receive the real dpi value:
+ ===== ====
VALUE DPI
+ ===== ====
1 400
2 800
4 1600
+ ===== ====
This file is readonly.
Has never been used. If bookkeeping is done, it's done in userland tools.
GPIOs are identified as they are inside the kernel, using integers in
the range 0..INT_MAX. See Documentation/admin-guide/gpio for more information.
+ ::
+
/sys/class/gpio
/export ... asks the kernel to export a GPIO to userspace
/unexport ... to return a GPIO to the kernel
devfs has been unmaintained for a number of years, has unfixable
races, contains a naming policy within the kernel that is
against the LSB, and can be replaced by using udev.
+
The files fs/devfs/*, include/linux/devfs_fs*.h were removed,
along with the assorted devfs function calls throughout the
kernel tree.
to implement sensible device security policies, and its low level
of abstraction that required userspace clients to duplicate much
of the kernel's ieee1394 core functionality.
+
Replaced by /dev/fw*, i.e. the <linux/firewire-cdev.h> ABI of
firewire-core.
claim just control over a single rfkill instance.
This file was scheduled to be removed in 2012, and was removed
in 2016.
-Values: 0: Kernel handles events
+Values: 0: Kernel handles events
performance issues in its first generation. Any video1394 user had
to use raw1394 + libraw1394 too because video1394 did not provide
asynchronous I/O for device discovery and configuration.
+
Replaced by /dev/fw*, i.e. the <linux/firewire-cdev.h> ABI of
firewire-core.
Each /dev/fw* is associated with one IEEE 1394 node, which can
be remote or local nodes. Operations on a /dev/fw* file have
different scope:
+
- The 1394 node which is associated with the file:
+
- Asynchronous request transmission
- Get the Configuration ROM
- Query node ID
- Query maximum speed of the path between this node
and local node
+
- The 1394 bus (i.e. "card") to which the node is attached to:
+
- Isochronous stream transmission and reception
- Asynchronous stream transmission and reception
- Asynchronous broadcast request transmission
manager
- Query cycle time
- Bus reset initiation, bus reset event reception
+
- All 1394 buses:
+
- Allocation of IEEE 1212 address ranges on the local
link layers, reception of inbound requests to such
an address range, asynchronous response transmission
userland implement different access permission models, some
operations are restricted to /dev/fw* files that are associated
with a local node:
+
- Addition of descriptors or directories to the local
nodes' Configuration ROM
- PHY packet transmission and reception
The following file operations are supported:
open(2)
- Currently the only useful flags are O_RDWR.
+ Currently the only useful flags are O_RDWR.
ioctl(2)
- Initiate various actions. Some take immediate effect, others
- are performed asynchronously while or after the ioctl returns.
- See the inline documentation in <linux/firewire-cdev.h> for
- descriptions of all ioctls.
+ Initiate various actions. Some take immediate effect, others
+ are performed asynchronously while or after the ioctl returns.
+ See the inline documentation in <linux/firewire-cdev.h> for
+ descriptions of all ioctls.
poll(2), select(2), epoll_wait(2) etc.
- Watch for events to become available to be read.
+ Watch for events to become available to be read.
read(2)
- Receive various events. There are solicited events like
- outbound asynchronous transaction completion or isochronous
- buffer completion, and unsolicited events such as bus resets,
- request reception, or PHY packet reception. Always use a read
- buffer which is large enough to receive the largest event that
- could ever arrive. See <linux/firewire-cdev.h> for descriptions
- of all event types and for which ioctls affect reception of
- events.
+ Receive various events. There are solicited events like
+ outbound asynchronous transaction completion or isochronous
+ buffer completion, and unsolicited events such as bus resets,
+ request reception, or PHY packet reception. Always use a read
+ buffer which is large enough to receive the largest event that
+ could ever arrive. See <linux/firewire-cdev.h> for descriptions
+ of all event types and for which ioctls affect reception of
+ events.
mmap(2)
- Allocate a DMA buffer for isochronous reception or transmission
- and map it into the process address space. The arguments should
- be used as follows: addr = NULL, length = the desired buffer
- size, i.e. number of packets times size of largest packet,
- prot = at least PROT_READ for reception and at least PROT_WRITE
- for transmission, flags = MAP_SHARED, fd = the handle to the
- /dev/fw*, offset = 0.
+ Allocate a DMA buffer for isochronous reception or transmission
+ and map it into the process address space. The arguments should
+ be used as follows: addr = NULL, length = the desired buffer
+ size, i.e. number of packets times size of largest packet,
+ prot = at least PROT_READ for reception and at least PROT_WRITE
+ for transmission, flags = MAP_SHARED, fd = the handle to the
+ /dev/fw*, offset = 0.
Isochronous reception works in packet-per-buffer fashion except
for multichannel reception which works in buffer-fill mode.
munmap(2)
- Unmap the isochronous I/O buffer from the process address space.
+ Unmap the isochronous I/O buffer from the process address space.
close(2)
- Besides stopping and freeing I/O contexts that were associated
- with the file descriptor, back out any changes to the local
- nodes' Configuration ROM. Deallocate isochronous channels and
- bandwidth at the IRM that were marked for kernel-assisted
- re- and deallocation.
-
-Users: libraw1394
- libdc1394
- libhinawa
+ Besides stopping and freeing I/O contexts that were associated
+ with the file descriptor, back out any changes to the local
+ nodes' Configuration ROM. Deallocate isochronous channels and
+ bandwidth at the IRM that were marked for kernel-assisted
+ re- and deallocation.
+
+Users: libraw1394;
+ libdc1394;
+ libhinawa;
tools like linux-firewire-utils, fwhack, ...
-What: /sys/firmware/acpi/pm_profile
+What: /sys/firmware/acpi/pm_profile
Date: 03-Nov-2011
KernelVersion: v3.2
Contact: linux-acpi@vger.kernel.org
-Description: The ACPI pm_profile sysfs interface exports the platform
+Description: The ACPI pm_profile sysfs interface exports the platform
power management (and performance) requirement expectations
as provided by BIOS. The integer value is directly passed as
retrieved from the FADT ACPI table.
-Values: For possible values see ACPI specification:
+
+Values: For possible values see ACPI specification:
5.2.9 Fixed ACPI Description Table (FADT)
Field: Preferred_PM_Profile
Currently these values are defined by spec:
- 0 Unspecified
- 1 Desktop
- 2 Mobile
- 3 Workstation
- 4 Enterprise Server
- 5 SOHO Server
- 6 Appliance PC
- 7 Performance Server
+
+ == =================
+ 0 Unspecified
+ 1 Desktop
+ 2 Mobile
+ 3 Workstation
+ 4 Enterprise Server
+ 5 SOHO Server
+ 6 Appliance PC
+ 7 Performance Server
>7 Reserved
+ == =================
IEEE 1394 node device attribute.
Read-only and immutable.
Values: 1: The sysfs entry represents a local node (a controller card).
+
0: The sysfs entry represents a remote node.
Read-only attribute, immutable during the target's lifetime.
Format, as exposed by firewire-sbp2 since 2.6.22, May 2007:
Colon-separated hexadecimal string representations of
+
u64 EUI-64 : u24 directory_ID : u16 LUN
+
without 0x prefixes, without whitespace. The former sbp2 driver
(removed in 2.6.37 after being superseded by firewire-sbp2) used
a somewhat shorter format which was not as close to SAM.
Note: This file is only present if CONFIG_NVMEM_SYSFS
is enabled
- ex:
- hexdump /sys/bus/nvmem/devices/qfprom0/nvmem
+ ex::
- 0000000 0000 0000 0000 0000 0000 0000 0000 0000
- *
- 00000a0 db10 2240 0000 e000 0c00 0c00 0000 0c00
- 0000000 0000 0000 0000 0000 0000 0000 0000 0000
- ...
- *
- 0001000
+ hexdump /sys/bus/nvmem/devices/qfprom0/nvmem
+
+ 0000000 0000 0000 0000 0000 0000 0000 0000 0000
+ *
+ 00000a0 db10 2240 0000 e000 0c00 0c00 0000 0c00
+ 0000000 0000 0000 0000 0000 0000 0000 0000 0000
+ ...
+ *
+ 0001000
Tools can use this file and the connected_duration file to
compute the percentage of time that a device has been active.
- For example,
- echo $((100 * `cat active_duration` / `cat connected_duration`))
+ For example::
+
+ echo $((100 * `cat active_duration` / `cat connected_duration`))
+
will give an integer percentage. Note that this does not
account for counter wrap.
Users:
Description: VCPU (sub)channel is affinitized to
Users: tools/hv/lsvmbus and other debugging tools
-What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/cpu
-Date: September. 2017
-KernelVersion: 4.14
-Contact: Stephen Hemminger <sthemmin@microsoft.com>
-Description: VCPU (sub)channel is affinitized to
-Users: tools/hv/lsvmbus and other debugging tools
-
What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/in_mask
Date: September. 2017
KernelVersion: 4.14
control systems are attached/generate presence for as short as
100 ms - hence the tens-to-hundreds milliseconds scan intervals
are required.
+
see Documentation/w1/w1-generic.rst for detailed information.
Users: any user space application which wants to know bus scanning
interval
Contact: Richard Purdie <rpurdie@rpsys.net>
Description:
Control BACKLIGHT power, values are FB_BLANK_* from fb.h
+
- FB_BLANK_UNBLANK (0) : power on.
- FB_BLANK_POWERDOWN (4) : power off
Users: HAL
KernelVersion: v2.6.12
Contact: linux-rdma@vger.kernel.org
Description:
+ =============== ===========================================
node_type: (RO) Node type (CA, RNIC, usNIC, usNIC UDP,
switch or router)
node_guid: (RO) Node GUID
sys_image_guid: (RO) System image GUID
+ =============== ===========================================
What: /sys/class/infiniband/<device>/node_desc
Contact: linux-rdma@vger.kernel.org
Description:
+ =============== ===============================================
lid: (RO) Port LID
rate: (RO) Port data rate (active width * active
cap_mask: (RO) Port capability mask. 2 bits here are
settable- IsCommunicationManagementSupported
- (set when CM module is loaded) and IsSM (set via
- open of issmN file).
+ (set when CM module is loaded) and IsSM (set
+ via open of issmN file).
+ =============== ===============================================
What: /sys/class/infiniband/<device>/ports/<port-num>/link_layer
KernelVersion: v2.6.12
Contact: linux-rdma@vger.kernel.org
Description:
- Errors info:
- -----------
+ **Errors info**:
symbol_error: (RO) Total number of minor link errors detected on
one or more physical lanes.
intervention. It can also indicate hardware issues or extremely
poor link signal integrity
- Data info:
- ---------
+ **Data info**:
port_xmit_data: (RO) Total number of data octets, divided by 4
(lanes), transmitted on all VLs. This is 64 bit counter
transmitted on all VLs from the port. This may include multicast
packets with errors.
- Misc info:
- ---------
+ **Misc info**:
port_xmit_discards: (RO) Total number of outbound packets
discarded by the port because the port is down or congested.
two umad devices and two issm devices, while a switch will have
one device of each type (for switch port 0).
+ ======= =====================================
ibdev: (RO) Show Infiniband (IB) device name
port: (RO) Display port number
+ ======= =====================================
What: /sys/class/infiniband_mad/abi_version
KernelVersion: v2.6.14
Contact: linux-rdma@vger.kernel.org
Description:
+ =============== ===========================================
ibdev: (RO) Display Infiniband (IB) device name
abi_version: (RO) Show ABI version of IB device specific
interfaces.
+ =============== ===========================================
What: /sys/class/infiniband_verbs/abi_version
KernelVersion: v2.6.12
Contact: linux-rdma@vger.kernel.org
Description:
+ =============== ================================================
hw_rev: (RO) Hardware revision number
hca_type: (RO) Host Channel Adapter type: MT23108, MT25208
(MT23108 compat mode), MT25208 or MT25204
board_id: (RO) Manufacturing board ID
+ =============== ================================================
sysfs interface for Mellanox ConnectX HCA IB driver (mlx4)
KernelVersion: v2.6.24
Contact: linux-rdma@vger.kernel.org
Description:
+ =============== ===============================
hw_rev: (RO) Hardware revision number
hca_type: (RO) Host channel adapter type
board_id: (RO) Manufacturing board ID
+ =============== ===============================
What: /sys/class/infiniband/mlx4_X/iov/ports/<port-num>/gids/<n>
example, ports/1/pkeys/10 contains the value at index 10 in port
1's P_Key table.
+ ======================= ==========================================
gids/<n>: (RO) The physical port gids n = 0..127
admin_guids/<n>: (RW) Allows examining or changing the
guest, whenever it uses its pkey index
1, will actually be using the real pkey
index 10.
+ ======================= ==========================================
What: /sys/class/infiniband/mlx4_X/iov/<pci-slot-num>/ports/<m>/smi_enabled
Enabling QP0 on VFs for selected VF/port. By default, no VFs are
enabled for QP0 operation.
- smi_enabled: (RO) Indicates whether smi is currently enabled
- for the indicated VF/port
+ ================= ==== ===========================================
+ smi_enabled: (RO) Indicates whether smi is currently enabled
+ for the indicated VF/port
- enable_smi_admin:(RW) Used by the admin to request that smi
- capability be enabled or disabled for the
- indicated VF/port. 0 = disable, 1 = enable.
+ enable_smi_admin: (RW) Used by the admin to request that smi
+ capability be enabled or disabled for the
+ indicated VF/port. 0 = disable, 1 = enable.
+ ================= ==== ===========================================
The requested enablement will occur at the next reset of the VF
(e.g. driver restart on the VM which owns the VF).
Contact: linux-rdma@vger.kernel.org
Description:
+ =============== =============================================
hw_rev: (RO) Hardware revision number
hca_type: (RO) Driver short name. Should normally match
board_id: (RO) Manufacturing board id. (Vendor + device
information)
+ =============== =============================================
sysfs interface for Intel IB driver qib
KernelVersion: v2.6.35
Contact: linux-rdma@vger.kernel.org
Description:
+ =============== ======================================================
version: (RO) Display version information of installed software
and drivers.
chip_reset: (WO) Reset the chip if possible by writing
"reset" to this file. Only allowed if no user
contexts are open that use chip resources.
+ =============== ======================================================
What: /sys/class/infiniband/qibX/ports/N/sl2vl/[0-15]
Description:
Per-port congestion control. Both are binary attributes.
- cc_table_bin: (RO) Congestion control table size followed by
+ =============== ================================================
+ cc_table_bin (RO) Congestion control table size followed by
table entries.
- cc_settings_bin:(RO) Congestion settings: port control, control
+ cc_settings_bin (RO) Congestion settings: port control, control
map and an array of 16 entries for the
congestion entries - increase, timer, event log
trigger threshold and the minimum injection rate
delay.
+ =============== ================================================
What: /sys/class/infiniband/qibX/ports/N/linkstate/loopback
What: /sys/class/infiniband/qibX/ports/N/linkstate/led_override
Description:
[to be documented]
+ =============== ===============================================
loopback: (WO)
led_override: (WO)
hrtbt_enable: (RW)
errors. Possible states are- "Initted",
"Present", "IB_link_up", "IB_configured" or
"Fatal_Hardware_Error".
+ =============== ===============================================
What: /sys/class/infiniband/qibX/ports/N/diag_counters/rc_resends
What: /sys/class/infiniband/qibX/ports/N/diag_counters/seq_naks
linux-rdma@vger.kernel.org
Description:
+ =============== ===============================================
board_id: (RO) Manufacturing board id
config: (RO) Report the configuration for this PF
iface: (RO) Shows which network interface this usNIC
entry is associated to (visible with ifconfig).
+ =============== ===============================================
What: /sys/class/infiniband/usnic_X/qpn/summary
What: /sys/class/infiniband/usnic_X/qpn/context
KernelVersion: v4.6
Contact: linux-rdma@vger.kernel.org
Description:
+ =============== =============================================
hw_rev: (RO) Hardware revision number
board_id: (RO) Manufacturing board id
available.
tempsense: (RO) Thermal sense information
+ =============== =============================================
What: /sys/class/infiniband/hfi1_X/ports/N/CCMgtA/cc_settings_bin
Description:
Per-port congestion control.
- cc_table_bin: (RO) CCA tables used by PSM2 Congestion control
+ =============== ================================================
+ cc_table_bin (RO) CCA tables used by PSM2 Congestion control
table size followed by table entries. Binary
attribute.
- cc_settings_bin:(RO) Congestion settings: port control, control
+ cc_settings_bin (RO) Congestion settings: port control, control
map and an array of 16 entries for the
congestion entries - increase, timer, event log
trigger threshold and the minimum injection rate
delay. Binary attribute.
- cc_prescan: (RW) enable prescanning for faster BECN
+ cc_prescan (RW) enable prescanning for faster BECN
response. Write "on" to enable and "off" to
disable.
+ =============== ================================================
What: /sys/class/infiniband/hfi1_X/ports/N/sc2vl/[0-31]
What: /sys/class/infiniband/hfi1_X/ports/N/sl2sc/[0-31]
KernelVersion: v4.6
Contact: linux-rdma@vger.kernel.org
Description:
+ =============== ===================================================
sc2vl/: (RO) 32 files (0 - 31) used to translate sl->vl
sl2sc/: (RO) 32 files (0 - 31) used to translate sl->sc
vl2mtu/: (RO) 16 files (0 - 15) used to determine MTU for vl
+ =============== ===================================================
What: /sys/class/infiniband/hfi1_X/sdma_N/cpu_list
Description:
sdma<N>/ contains one directory per sdma engine (0 - 15)
+ =============== ==============================================
cpu_list: (RW) List of cpus for user-process to sdma
engine assignment.
vl: (RO) Displays the virtual lane (vl) the sdma
engine maps to.
+ =============== ==============================================
This interface gives the user control on the affinity settings
for the device. As an example, to set an sdma engine irq
affinity and thread affinity of a user processes to use the
sdma engine, which is "near" in terms of NUMA configuration, or
- physical cpu location, the user will do:
+ physical cpu location, the user will do::
- echo "3" > /proc/irq/<N>/smp_affinity_list
- echo "4-7" > /sys/devices/.../sdma3/cpu_list
- cat /sys/devices/.../sdma3/vl
- 0
- echo "8" > /proc/irq/<M>/smp_affinity_list
- echo "9-12" > /sys/devices/.../sdma4/cpu_list
- cat /sys/devices/.../sdma4/vl
- 1
+ echo "3" > /proc/irq/<N>/smp_affinity_list
+ echo "4-7" > /sys/devices/.../sdma3/cpu_list
+ cat /sys/devices/.../sdma3/vl
+ 0
+ echo "8" > /proc/irq/<M>/smp_affinity_list
+ echo "9-12" > /sys/devices/.../sdma4/cpu_list
+ cat /sys/devices/.../sdma4/vl
+ 1
to make sure that when a process runs on cpus 4,5,6, or 7, and
uses vl=0, then sdma engine 3 is selected by the driver, and
KernelVersion: v4.10
Contact: linux-rdma@vger.kernel.org
Description:
+ =============== ==== ========================
hw_rev: (RO) Hardware revision number
hca_type: (RO) Show HCA type (I40IW)
board_id: (RO) I40IW board ID
+ =============== ==== ========================
sysfs interface for QLogic qedr NIC Driver
Contact: linux-rdma@vger.kernel.org
Description:
+ =============== ==== ========================
hw_rev: (RO) Hardware revision number
hca_type: (RO) Display HCA type
+ =============== ==== ========================
sysfs interface for VMware Paravirtual RDMA driver
Contact: linux-rdma@vger.kernel.org
Description:
+ =============== ==== =====================================
hw_rev: (RO) Hardware revision number
hca_type: (RO) Host channel adapter type
board_id: (RO) Display PVRDMA manufacturing board ID
+ =============== ==== =====================================
sysfs interface for Broadcom NetXtreme-E RoCE driver
KernelVersion: v4.11
Contact: linux-rdma@vger.kernel.org
Description:
+ =============== ==== =========================
hw_rev: (RO) Hardware revision number
hca_type: (RO) Host channel adapter type
+ =============== ==== =========================
For details to this subsystem look at Documentation/driver-api/rfkill.rst.
-For the deprecated /sys/class/rfkill/*/claim knobs of this interface look in
+For the deprecated ``/sys/class/rfkill/*/claim`` knobs of this interface look in
Documentation/ABI/removed/sysfs-class-rfkill.
What: /sys/class/rfkill
Contact: linux-wireless@vger.kernel.org
Description: Whether the soft blocked state is initialised from non-volatile
storage at startup.
-Values: A numeric value.
- 0: false
- 1: true
+Values: A numeric value:
+
+ - 0: false
+ - 1: true
What: /sys/class/rfkill/rfkill[0-9]+/state
through this interface. There will likely be another attempt to
remove it in the future.
Values: A numeric value.
+
0: RFKILL_STATE_SOFT_BLOCKED
transmitter is turned off by software
1: RFKILL_STATE_UNBLOCKED
Contact: linux-wireless@vger.kernel.org
Description: Current hardblock state. This file is read only.
Values: A numeric value.
+
0: inactive
The transmitter is (potentially) active.
1: active
Contact: linux-wireless@vger.kernel.org
Description: Current softblock state. This file is read and write.
Values: A numeric value.
+
0: inactive
The transmitter is (potentially) active.
+
1: active
The transmitter is turned off by software.
Contact: linux-integrity@vger.kernel.org
Description: The "caps" property contains TPM manufacturer and version info.
- Example output:
+ Example output::
- Manufacturer: 0x53544d20
- TCG version: 1.2
- Firmware version: 8.16
+ Manufacturer: 0x53544d20
+ TCG version: 1.2
+ Firmware version: 8.16
Manufacturer is a hex dump of the 4 byte manufacturer info
space in a TPM. TCG version shows the TCG TPM spec level that
any longer than necessary before starting to poll for a
result.
- Example output:
+ Example output::
- 3015000 4508000 180995000 [original]
+ 3015000 4508000 180995000 [original]
Here the short, medium and long durations are displayed in
usecs. "[original]" indicates that the values are displayed
values may be constantly changing, the output is only valid
for a snapshot in time.
- Example output:
+ Example output::
- PCR-00: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
- PCR-01: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
- PCR-02: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
- PCR-03: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
- PCR-04: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
- ...
+ PCR-00: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
+ PCR-01: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
+ PCR-02: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
+ PCR-03: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
+ PCR-04: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
+ ...
The number of PCRs and hex bytes needed to represent a PCR
value will vary depending on TPM chip version. For TPM 1.1 and
ated at TPM manufacture time and exists for the life of the
chip.
- Example output:
-
- Algorithm: 00 00 00 01
- Encscheme: 00 03
- Sigscheme: 00 01
- Parameters: 00 00 08 00 00 00 00 02 00 00 00 00
- Modulus length: 256
- Modulus:
- B4 76 41 82 C9 20 2C 10 18 40 BC 8B E5 44 4C 6C
- 3A B2 92 0C A4 9B 2A 83 EB 5C 12 85 04 48 A0 B6
- 1E E4 81 84 CE B2 F2 45 1C F0 85 99 61 02 4D EB
- 86 C4 F7 F3 29 60 52 93 6B B2 E5 AB 8B A9 09 E3
- D7 0E 7D CA 41 BF 43 07 65 86 3C 8C 13 7A D0 8B
- 82 5E 96 0B F8 1F 5F 34 06 DA A2 52 C1 A9 D5 26
- 0F F4 04 4B D9 3F 2D F2 AC 2F 74 64 1F 8B CD 3E
- 1E 30 38 6C 70 63 69 AB E2 50 DF 49 05 2E E1 8D
- 6F 78 44 DA 57 43 69 EE 76 6C 38 8A E9 8E A3 F0
- A7 1F 3C A8 D0 12 15 3E CA 0E BD FA 24 CD 33 C6
- 47 AE A4 18 83 8E 22 39 75 93 86 E6 FD 66 48 B6
- 10 AD 94 14 65 F9 6A 17 78 BD 16 53 84 30 BF 70
- E0 DC 65 FD 3C C6 B0 1E BF B9 C1 B5 6C EF B1 3A
- F8 28 05 83 62 26 11 DC B4 6B 5A 97 FF 32 26 B6
- F7 02 71 CF 15 AE 16 DD D1 C1 8E A8 CF 9B 50 7B
- C3 91 FF 44 1E CF 7C 39 FE 17 77 21 20 BD CE 9B
-
- Possible values:
-
- Algorithm: TPM_ALG_RSA (1)
- Encscheme: TPM_ES_RSAESPKCSv15 (2)
+ Example output::
+
+ Algorithm: 00 00 00 01
+ Encscheme: 00 03
+ Sigscheme: 00 01
+ Parameters: 00 00 08 00 00 00 00 02 00 00 00 00
+ Modulus length: 256
+ Modulus:
+ B4 76 41 82 C9 20 2C 10 18 40 BC 8B E5 44 4C 6C
+ 3A B2 92 0C A4 9B 2A 83 EB 5C 12 85 04 48 A0 B6
+ 1E E4 81 84 CE B2 F2 45 1C F0 85 99 61 02 4D EB
+ 86 C4 F7 F3 29 60 52 93 6B B2 E5 AB 8B A9 09 E3
+ D7 0E 7D CA 41 BF 43 07 65 86 3C 8C 13 7A D0 8B
+ 82 5E 96 0B F8 1F 5F 34 06 DA A2 52 C1 A9 D5 26
+ 0F F4 04 4B D9 3F 2D F2 AC 2F 74 64 1F 8B CD 3E
+ 1E 30 38 6C 70 63 69 AB E2 50 DF 49 05 2E E1 8D
+ 6F 78 44 DA 57 43 69 EE 76 6C 38 8A E9 8E A3 F0
+ A7 1F 3C A8 D0 12 15 3E CA 0E BD FA 24 CD 33 C6
+ 47 AE A4 18 83 8E 22 39 75 93 86 E6 FD 66 48 B6
+ 10 AD 94 14 65 F9 6A 17 78 BD 16 53 84 30 BF 70
+ E0 DC 65 FD 3C C6 B0 1E BF B9 C1 B5 6C EF B1 3A
+ F8 28 05 83 62 26 11 DC B4 6B 5A 97 FF 32 26 B6
+ F7 02 71 CF 15 AE 16 DD D1 C1 8E A8 CF 9B 50 7B
+ C3 91 FF 44 1E CF 7C 39 FE 17 77 21 20 BD CE 9B
+
+ Possible values::
+
+ Algorithm: TPM_ALG_RSA (1)
+ Encscheme: TPM_ES_RSAESPKCSv15 (2)
TPM_ES_RSAESOAEP_SHA1_MGF1 (3)
- Sigscheme: TPM_SS_NONE (1)
- Parameters, a byte string of 3 u32 values:
+ Sigscheme: TPM_SS_NONE (1)
+ Parameters, a byte string of 3 u32 values:
Key Length (bits): 00 00 08 00 (2048)
Num primes: 00 00 00 02 (2)
Exponent Size: 00 00 00 00 (0 means the
default exp)
- Modulus Length: 256 (bytes)
- Modulus: The 256 byte Endorsement Key modulus
+ Modulus Length: 256 (bytes)
+ Modulus: The 256 byte Endorsement Key modulus
What: /sys/class/tpm/tpmX/device/temp_deactivated
Date: April 2006
timeouts is defined by the TPM interface spec that the chip
conforms to.
- Example output:
+ Example output::
- 750000 750000 750000 750000 [original]
+ 750000 750000 750000 750000 [original]
The four timeout values are shown in usecs, with a trailing
"[original]" or "[adjusted]" depending on whether the values
Description: The "tpm_version_major" property shows the TCG spec major version
implemented by the TPM device.
- Example output:
+ Example output::
- 2
+ 2
-# Note: This documents additional properties of any device beyond what
-# is documented in Documentation/admin-guide/sysfs-rules.rst
+Note:
+ This documents additional properties of any device beyond what
+ is documented in Documentation/admin-guide/sysfs-rules.rst
What: /sys/devices/*/of_node
Date: February 2015
resets. Three registers are used by the FSBL and
other Xilinx software products: GLOBAL_GEN_STORAGE{4:6}.
- Usage:
- # cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
- # echo <value> > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
+ Usage::
+
+ # cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
+ # echo <value> > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
+
+ Example::
- Example:
- # cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
- # echo 0x1234ABCD > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
+ # cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
+ # echo 0x1234ABCD > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
Users: Xilinx
software products: PERS_GLOB_GEN_STORAGE{4:7}.
Register is reset only by a POR reset.
- Usage:
- # cat /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
- # echo <value> > /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
+ Usage::
+
+ # cat /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
+ # echo <value> > /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
+
+ Example::
- Example:
- # cat /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
- # echo 0x1234ABCD > /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
+ # cat /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
+ # echo 0x1234ABCD > /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
Users: Xilinx
Following are available shutdown scopes(subtypes):
- subsystem: Only the APU along with all of its peripherals
+ subsystem:
+ Only the APU along with all of its peripherals
not used by other processing units will be
shut down. This may result in the FPD power
domain being shut down provided that no other
processing unit uses FPD peripherals or DRAM.
- ps_only: The complete PS will be shut down, including the
+ ps_only:
+ The complete PS will be shut down, including the
RPU, PMU, etc. Only the PL domain (FPGA)
remains untouched.
- system: The complete system/device is shut down.
+ system:
+ The complete system/device is shut down.
- Usage:
- # cat /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
- # echo <scope> > /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
+ Usage::
+
+ # cat /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
+ # echo <scope> > /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
+
+ Example::
- Example:
- # cat /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
- # echo "subsystem" > /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
+ # cat /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
+ # echo "subsystem" > /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
Users: Xilinx
system restart.
Usage:
- Set healthy bit
- # echo 1 > /sys/devices/platform/firmware\:zynqmp-firmware/health_status
- Unset healthy bit
- # echo 0 > /sys/devices/platform/firmware\:zynqmp-firmware/health_status
+ Set healthy bit::
+
+ # echo 1 > /sys/devices/platform/firmware\:zynqmp-firmware/health_status
+
+ Unset healthy bit::
+
+ # echo 0 > /sys/devices/platform/firmware\:zynqmp-firmware/health_status
Users: Xilinx
One can request ib_srp to connect to a new target by writing
a comma-separated list of login parameters to this sysfs
attribute. The supported parameters are:
+
* id_ext, a 16-digit hexadecimal number specifying the eight
byte identifier extension in the 16-byte SRP target port
identifier. The target port identifier is sent by ib_srp
speakup if for example
the say screen command is used before the
entire screen is read.
+
With no_interrupt set to one, if the say
screen command is used, and one then types on the keyboard,
speakup will continue to say the whole screen regardless until
Again, these are part of the help system. For instance, if you
had pressed speakup + keypad 3, you would hear:
"speakup keypad 3 is go to bottom edge."
+
The speakup key is depressed, so the name of the key state is
speakup.
+
This part of the message comes from the states collection.
What: /sys/accessibility/speakup/i18n/characters
Contact: speakup@linux-speakup.org
Description: Controls if punctuation is spoken by speakup, or by the
synthesizer.
+
For example, speakup speaks ">" as "greater", while
the espeak synthesizer used by the soft driver speaks "greater
than". Zero lets speakup speak the punctuation. One lets the
directory has a name of the form "<key>-<vendor guid>"
and contains the following files:
+ =============== ========================================
attributes: A read-only text file enumerating the
EFI variable flags. Potential values
include:
size: As ASCII representation of the size of
the variable's value.
+ =============== ========================================
In addition, two other magic binary files are provided
in the top-level directory and are used for adding and
removing variables:
+ =============== ========================================
new_var: Takes a "struct efi_variable" and
instructs the EFI firmware to create a
new variable.
instructs the EFI firmware to remove any
variable that has a matching vendor GUID
and variable key name.
+ =============== ========================================
This is only for the powerpc/powernv platform.
+ =============== ===============================================
initiate_dump: When '1' is written to it,
we will initiate a dump.
Read this file for supported commands.
and ID of the dump, use the id and type files.
Do not rely on any particular size of dump
type or dump id.
+ =============== ===============================================
Each dump has the following files:
+
+ =============== ===============================================
id: An ASCII representation of the dump ID
in hex (e.g. '0x01')
type: An ASCII representation of the type of
inaccessible.
Reading this file will get a list of
supported actions.
+ =============== ===============================================
For each log entry (directory), there are the following
files:
+ ============== ================================================
id: An ASCII representation of the ID of the
error log, in hex - e.g. "0x01".
entry will be removed from sysfs.
Reading this file will list the supported
operations (currently just acknowledge).
+ ============== ================================================
Space separated list of supported guest system types. Each type
is in the format: <class>-<major>.<minor>-<arch>
With:
+
+ ======== ============================================
<class>: "xen" -- x86: paravirtualized, arm: standard
"hvm" -- x86 only: fully virtualized
<major>: major guest interface version
"x86_64": 64 bit x86 guest
"armv7l": 32 bit arm guest
"aarch64": 64 bit arm guest
+ ======== ============================================
What: /sys/hypervisor/properties/changeset
Date: March 2009
+What: vDSO
+Date: July 2011
+KernelVersion: 3.0
+Contact: Andy Lutomirski <luto@kernel.org>
+Description:
+
On some architectures, when the kernel loads any userspace program it
maps an ELF DSO into that program's address space. This DSO is called
the vDSO and it often contains useful and highly-optimized alternatives
ABI of those symbols is considered stable. It may vary across architectures,
though.
-(As of this writing, this ABI documentation as been confirmed for x86_64.
+Note:
+ As of this writing, this ABI documentation as been confirmed for x86_64.
The maintainers of the other vDSO-using architectures should confirm
- that it is correct for their architecture.)
+ that it is correct for their architecture.
This group contains the configuration for user defined ACPI
tables. The attributes of a user define table are:
- aml - a binary attribute that the user can use to
+ aml
+ - a binary attribute that the user can use to
fill in the ACPI aml definitions. Once the aml
data is written to this file and the file is
closed the table will be loaded and ACPI devices
The rest of the attributes are read-only and are valid only
after the table has been loaded by filling the aml entry:
- signature - ASCII table signature
- length - length of table in bytes, including the header
- revision - ACPI Specification minor version number
- oem_id - ASCII OEM identification
- oem_table_id - ASCII OEM table identification
- oem_revision - OEM revision number
- asl_compiler_id - ASCII ASL compiler vendor ID
- asl_compiler_revision - ASL compiler version
+ signature
+ - ASCII table signature
+
+ length
+ - length of table in bytes, including the header
+
+ revision
+ - ACPI Specification minor version number
+
+ oem_id
+ - ASCII OEM identification
+
+ oem_table_id
+ - ASCII OEM table identification
+
+ oem_revision
+ - OEM revision number
+
+ asl_compiler_id
+ - ASCII ASL compiler vendor ID
+
+ asl_compiler_revision
+ - ASL compiler version
Description:
The attributes:
- buffer_size configure the buffer size for this channel
+ buffer_size
+ configure the buffer size for this channel
- subbuffer_size configure the sub-buffer size for this channel
+ subbuffer_size
+ configure the sub-buffer size for this channel
(needed for synchronous and isochrnous data)
- num_buffers configure number of buffers used for this
+ num_buffers
+ configure number of buffers used for this
channel
- datatype configure type of data that will travel over
+ datatype
+ configure type of data that will travel over
this channel
- direction configure whether this link will be an input
+ direction
+ configure whether this link will be an input
or output
- dbr_size configure DBR data buffer size (this is used
+ dbr_size
+ configure DBR data buffer size (this is used
for MediaLB communication only)
packets_per_xact
transmitted via USB (this is used for USB
communication only)
- device name of the device the link is to be attached to
+ device
+ name of the device the link is to be attached to
- channel name of the channel the link is to be attached to
+ channel
+ name of the channel the link is to be attached to
- comp_params pass parameters needed by some components
+ comp_params
+ pass parameters needed by some components
- create_link write '1' to this attribute to trigger the
+ create_link
+ write '1' to this attribute to trigger the
creation of the link. In case of speculative
configuration, the creation is post-poned until
a physical device is being attached to the bus.
- destroy_link write '1' to this attribute to destroy an
+ destroy_link
+ write '1' to this attribute to destroy an
active link
What: /sys/kernel/config/most_video/<link>
Description:
The attributes:
- buffer_size configure the buffer size for this channel
+ buffer_size
+ configure the buffer size for this channel
- subbuffer_size configure the sub-buffer size for this channel
+ subbuffer_size
+ configure the sub-buffer size for this channel
(needed for synchronous and isochrnous data)
- num_buffers configure number of buffers used for this
+ num_buffers
+ configure number of buffers used for this
channel
- datatype configure type of data that will travel over
+ datatype
+ configure type of data that will travel over
this channel
- direction configure whether this link will be an input
+ direction
+ configure whether this link will be an input
or output
- dbr_size configure DBR data buffer size (this is used
+ dbr_size
+ configure DBR data buffer size (this is used
for MediaLB communication only)
packets_per_xact
transmitted via USB (this is used for USB
communication only)
- device name of the device the link is to be attached to
+ device
+ name of the device the link is to be attached to
- channel name of the channel the link is to be attached to
+ channel
+ name of the channel the link is to be attached to
- comp_params pass parameters needed by some components
+ comp_params
+ pass parameters needed by some components
- create_link write '1' to this attribute to trigger the
+ create_link
+ write '1' to this attribute to trigger the
creation of the link. In case of speculative
configuration, the creation is post-poned until
a physical device is being attached to the bus.
- destroy_link write '1' to this attribute to destroy an
+ destroy_link
+ write '1' to this attribute to destroy an
active link
What: /sys/kernel/config/most_net/<link>
Description:
The attributes:
- buffer_size configure the buffer size for this channel
+ buffer_size
+ configure the buffer size for this channel
- subbuffer_size configure the sub-buffer size for this channel
+ subbuffer_size
+ configure the sub-buffer size for this channel
(needed for synchronous and isochrnous data)
- num_buffers configure number of buffers used for this
+ num_buffers
+ configure number of buffers used for this
channel
- datatype configure type of data that will travel over
+ datatype
+ configure type of data that will travel over
this channel
- direction configure whether this link will be an input
+ direction
+ configure whether this link will be an input
or output
- dbr_size configure DBR data buffer size (this is used
+ dbr_size
+ configure DBR data buffer size (this is used
for MediaLB communication only)
packets_per_xact
transmitted via USB (this is used for USB
communication only)
- device name of the device the link is to be attached to
+ device
+ name of the device the link is to be attached to
- channel name of the channel the link is to be attached to
+ channel
+ name of the channel the link is to be attached to
- comp_params pass parameters needed by some components
+ comp_params
+ pass parameters needed by some components
- create_link write '1' to this attribute to trigger the
+ create_link
+ write '1' to this attribute to trigger the
creation of the link. In case of speculative
configuration, the creation is post-poned until
a physical device is being attached to the bus.
- destroy_link write '1' to this attribute to destroy an
+ destroy_link
+ write '1' to this attribute to destroy an
active link
What: /sys/kernel/config/most_sound/<card>
Description:
The attributes:
- create_card write '1' to this attribute to trigger the
+ create_card
+ write '1' to this attribute to trigger the
registration of the sound card with the ALSA
subsystem.
Description:
The attributes:
- buffer_size configure the buffer size for this channel
+ buffer_size
+ configure the buffer size for this channel
- subbuffer_size configure the sub-buffer size for this channel
+ subbuffer_size
+ configure the sub-buffer size for this channel
(needed for synchronous and isochrnous data)
- num_buffers configure number of buffers used for this
+ num_buffers
+ configure number of buffers used for this
channel
- datatype configure type of data that will travel over
+ datatype
+ configure type of data that will travel over
this channel
- direction configure whether this link will be an input
+ direction
+ configure whether this link will be an input
or output
- dbr_size configure DBR data buffer size (this is used
+ dbr_size
+ configure DBR data buffer size (this is used
for MediaLB communication only)
packets_per_xact
transmitted via USB (this is used for USB
communication only)
- device name of the device the link is to be attached to
+ device
+ name of the device the link is to be attached to
- channel name of the channel the link is to be attached to
+ channel
+ name of the channel the link is to be attached to
- comp_params pass parameters needed by some components
+ comp_params
+ pass parameters needed by some components
- create_link write '1' to this attribute to trigger the
+ create_link
+ write '1' to this attribute to trigger the
creation of the link. In case of speculative
configuration, the creation is post-poned until
a physical device is being attached to the bus.
- destroy_link write '1' to this attribute to destroy an
+ destroy_link
+ write '1' to this attribute to destroy an
active link
This interfaces can be used to show spear's PCIe device capability.
Nodes are only visible when configfs is mounted. To mount configfs
- in /config directory use:
- # mount -t configfs none /config/
+ in /config directory use::
- For nth PCIe Device Controller
- /config/pcie-gadget.n/
- link ... used to enable ltssm and read its status.
- int_type ...used to configure and read type of supported
- interrupt
- no_of_msi ... used to configure number of MSI vector needed and
+ # mount -t configfs none /config/
+
+ For nth PCIe Device Controller /config/pcie-gadget.n/:
+
+ =============== ======================================================
+ link used to enable ltssm and read its status.
+ int_type used to configure and read type of supported interrupt
+ no_of_msi used to configure number of MSI vector needed and
to read no of MSI granted.
- inta ... write 1 to assert INTA and 0 to de-assert.
- send_msi ... write MSI vector to be sent.
- vendor_id ... used to write and read vendor id (hex)
- device_id ... used to write and read device id (hex)
- bar0_size ... used to write and read bar0_size
- bar0_address ... used to write and read bar0 mapped area in hex.
- bar0_rw_offset ... used to write and read offset of bar0 where
- bar0_data will be written or read.
- bar0_data ... used to write and read data at bar0_rw_offset.
+ inta write 1 to assert INTA and 0 to de-assert.
+ send_msi write MSI vector to be sent.
+ vendor_id used to write and read vendor id (hex)
+ device_id used to write and read device id (hex)
+ bar0_size used to write and read bar0_size
+ bar0_address used to write and read bar0 mapped area in hex.
+ bar0_rw_offset used to write and read offset of bar0 where bar0_data
+ will be written or read.
+ bar0_data used to write and read data at bar0_rw_offset.
+ =============== ======================================================
The attributes of a gadget:
- UDC - bind a gadget to UDC/unbind a gadget;
- write UDC's name found in /sys/class/udc/*
- to bind a gadget, empty string "" to unbind.
-
- max_speed - maximum speed the driver supports. Valid
- names are super-speed-plus, super-speed,
- high-speed, full-speed, and low-speed.
-
- bDeviceClass - USB device class code
- bDeviceSubClass - USB device subclass code
- bDeviceProtocol - USB device protocol code
- bMaxPacketSize0 - maximum endpoint 0 packet size
- bcdDevice - bcd device release number
- bcdUSB - bcd USB specification version number
- idProduct - product ID
- idVendor - vendor ID
+ ================ ============================================
+ UDC bind a gadget to UDC/unbind a gadget;
+ write UDC's name found in /sys/class/udc/*
+ to bind a gadget, empty string "" to unbind.
+
+ max_speed maximum speed the driver supports. Valid
+ names are super-speed-plus, super-speed,
+ high-speed, full-speed, and low-speed.
+
+ bDeviceClass USB device class code
+ bDeviceSubClass USB device subclass code
+ bDeviceProtocol USB device protocol code
+ bMaxPacketSize0 maximum endpoint 0 packet size
+ bcdDevice bcd device release number
+ bcdUSB bcd USB specification version number
+ idProduct product ID
+ idVendor vendor ID
+ ================ ============================================
What: /config/usb-gadget/gadget/configs
Date: Jun 2013
Description:
The attributes of a configuration:
- bmAttributes - configuration characteristics
- MaxPower - maximum power consumption from the bus
+ ================ ======================================
+ bmAttributes configuration characteristics
+ MaxPower maximum power consumption from the bus
+ ================ ======================================
What: /config/usb-gadget/gadget/configs/config/strings
Date: Jun 2013
Description:
The attributes:
- configuration - configuration description
+ ================ =========================
+ configuration configuration description
+ ================ =========================
What: /config/usb-gadget/gadget/functions
The attributes:
- compatible_id - 8-byte string for "Compatible ID"
- sub_compatible_id - 8-byte string for "Sub Compatible ID"
+ ================= =====================================
+ compatible_id 8-byte string for "Compatible ID"
+ sub_compatible_id 8-byte string for "Sub Compatible ID"
+ ================= =====================================
What: /config/usb-gadget/gadget/functions/<func>.<inst>/interface.<n>/<property>
Date: May 2014
The attributes:
- type - value 1..7 for interpreting the data
- 1: unicode string
- 2: unicode string with environment variable
- 3: binary
- 4: little-endian 32-bit
- 5: big-endian 32-bit
- 6: unicode string with a symbolic link
- 7: multiple unicode strings
- data - blob of data to be interpreted depending on
+ ===== ===============================================
+ type value 1..7 for interpreting the data
+
+ - 1: unicode string
+ - 2: unicode string with environment variable
+ - 3: binary
+ - 4: little-endian 32-bit
+ - 5: big-endian 32-bit
+ - 6: unicode string with a symbolic link
+ - 7: multiple unicode strings
+ data blob of data to be interpreted depending on
type
+ ===== ===============================================
What: /config/usb-gadget/gadget/strings
Date: Jun 2013
Description:
The attributes:
- serialnumber - gadget's serial number (string)
- product - gadget's product description
- manufacturer - gadget's manufacturer description
+ ============ =================================
+ serialnumber gadget's serial number (string)
+ product gadget's product description
+ manufacturer gadget's manufacturer description
+ ============ =================================
What: /config/usb-gadget/gadget/os_desc
Date: May 2014
Description:
This group contains "OS String" extension handling attributes.
- use - flag turning "OS Desctiptors" support on/off
- b_vendor_code - one-byte value used for custom per-device and
+ ============= ===============================================
+ use flag turning "OS Desctiptors" support on/off
+ b_vendor_code one-byte value used for custom per-device and
per-interface requests
- qw_sign - an identifier to be reported as "OS String"
+ qw_sign an identifier to be reported as "OS String"
proper
+ ============= ===============================================
Description:
The attributes:
- ifname - network device interface name associated with
+ ifname
+ - network device interface name associated with
this function instance
- qmult - queue length multiplier for high and
+ qmult
+ - queue length multiplier for high and
super speed
- host_addr - MAC address of host's end of this
+ host_addr
+ - MAC address of host's end of this
Ethernet over USB link
- dev_addr - MAC address of device's end of this
+ dev_addr
+ - MAC address of device's end of this
Ethernet over USB link
Description:
The attributes:
- ifname - network device interface name associated with
+ ========== =============================================
+ ifname network device interface name associated with
this function instance
- qmult - queue length multiplier for high and
+ qmult queue length multiplier for high and
super speed
- host_addr - MAC address of host's end of this
+ host_addr MAC address of host's end of this
Ethernet over USB link
- dev_addr - MAC address of device's end of this
+ dev_addr MAC address of device's end of this
Ethernet over USB link
+ ========== =============================================
Description:
The attributes:
- protocol - HID protocol to use
- report_desc - blob corresponding to HID report descriptors
+ ============= ============================================
+ protocol HID protocol to use
+ report_desc blob corresponding to HID report descriptors
except the data passed through /dev/hidg<N>
- report_length - HID report length
- subclass - HID device subclass to use
+ report_length HID report length
+ subclass HID device subclass to use
+ ============= ============================================
Description:
The attributes:
- qlen - depth of loopback queue
- buflen - buffer length
+ ======= =======================
+ qlen depth of loopback queue
+ buflen buffer length
+ ======= =======================
Description:
The attributes:
- stall - Set to permit function to halt bulk endpoints.
+ =========== ==============================================
+ stall Set to permit function to halt bulk endpoints.
Disabled on some USB devices known not to work
correctly. You should set it to true.
- num_buffers - Number of pipeline buffers. Valid numbers
+ num_buffers Number of pipeline buffers. Valid numbers
are 2..4. Available only if
CONFIG_USB_GADGET_DEBUG_FILES is set.
+ =========== ==============================================
What: /config/usb-gadget/gadget/functions/mass_storage.name/lun.name
Date: Oct 2013
Description:
The attributes:
- file - The path to the backing file for the LUN.
+ =========== ==============================================
+ file The path to the backing file for the LUN.
Required if LUN is not marked as removable.
- ro - Flag specifying access to the LUN shall be
+ ro Flag specifying access to the LUN shall be
read-only. This is implied if CD-ROM emulation
is enabled as well as when it was impossible
to open "filename" in R/W mode.
- removable - Flag specifying that LUN shall be indicated as
+ removable Flag specifying that LUN shall be indicated as
being removable.
- cdrom - Flag specifying that LUN shall be reported as
+ cdrom Flag specifying that LUN shall be reported as
being a CD-ROM.
- nofua - Flag specifying that FUA flag
+ nofua Flag specifying that FUA flag
in SCSI WRITE(10,12)
+ =========== ==============================================
Description:
The attributes:
- index - index value for the USB MIDI adapter
- id - ID string for the USB MIDI adapter
- buflen - MIDI buffer length
- qlen - USB read request queue length
- in_ports - number of MIDI input ports
- out_ports - number of MIDI output ports
+ ========== ====================================
+ index index value for the USB MIDI adapter
+ id ID string for the USB MIDI adapter
+ buflen MIDI buffer length
+ qlen USB read request queue length
+ in_ports number of MIDI input ports
+ out_ports number of MIDI output ports
+ ========== ====================================
Description:
The attributes:
- pnp_string - Data to be passed to the host in pnp string
- q_len - Number of requests per endpoint
+ ========== ===========================================
+ pnp_string Data to be passed to the host in pnp string
+ q_len Number of requests per endpoint
+ ========== ===========================================
Description:
The attributes:
- ifname - network device interface name associated with
+ ========= =============================================
+ ifname network device interface name associated with
this function instance
- qmult - queue length multiplier for high and
+ qmult queue length multiplier for high and
super speed
- host_addr - MAC address of host's end of this
+ host_addr MAC address of host's end of this
Ethernet over USB link
- dev_addr - MAC address of device's end of this
+ dev_addr MAC address of device's end of this
Ethernet over USB link
- class - USB interface class, default is 02 (hex)
- subclass - USB interface subclass, default is 06 (hex)
- protocol - USB interface protocol, default is 00 (hex)
+ class USB interface class, default is 02 (hex)
+ subclass USB interface subclass, default is 06 (hex)
+ protocol USB interface protocol, default is 00 (hex)
+ ========= =============================================
Description:
The attributes:
- pattern - 0 (all zeros), 1 (mod63), 2 (none)
- isoc_interval - 1..16
- isoc_maxpacket - 0 - 1023 (fs), 0 - 1024 (hs/ss)
- isoc_mult - 0..2 (hs/ss only)
- isoc_maxburst - 0..15 (ss only)
- buflen - buffer length
- bulk_qlen - depth of queue for bulk
- iso_qlen - depth of queue for iso
+ ============== ==================================
+ pattern 0 (all zeros), 1 (mod63), 2 (none)
+ isoc_interval 1..16
+ isoc_maxpacket 0 - 1023 (fs), 0 - 1024 (hs/ss)
+ isoc_mult 0..2 (hs/ss only)
+ isoc_maxburst 0..15 (ss only)
+ buflen buffer length
+ bulk_qlen depth of queue for bulk
+ iso_qlen depth of queue for iso
+ ============== ==================================
Description:
The attributes:
- ifname - network device interface name associated with
+ ========== =============================================
+ ifname network device interface name associated with
this function instance
- qmult - queue length multiplier for high and
+ qmult queue length multiplier for high and
super speed
- host_addr - MAC address of host's end of this
+ host_addr MAC address of host's end of this
Ethernet over USB link
- dev_addr - MAC address of device's end of this
+ dev_addr MAC address of device's end of this
Ethernet over USB link
+ ========== =============================================
Description:
The attributes:
- c_chmask - capture channel mask
- c_srate - capture sampling rate
- c_ssize - capture sample size (bytes)
- p_chmask - playback channel mask
- p_srate - playback sampling rate
- p_ssize - playback sample size (bytes)
- req_number - the number of pre-allocated request
- for both capture and playback
+ ========== ===================================
+ c_chmask capture channel mask
+ c_srate capture sampling rate
+ c_ssize capture sample size (bytes)
+ p_chmask playback channel mask
+ p_srate playback sampling rate
+ p_ssize playback sample size (bytes)
+ req_number the number of pre-allocated request
+ for both capture and playback
+ ========== ===================================
Description:
The attributes:
- c_chmask - capture channel mask
- c_srate - capture sampling rate
- c_ssize - capture sample size (bytes)
- p_chmask - playback channel mask
- p_srate - playback sampling rate
- p_ssize - playback sample size (bytes)
+ ========= ============================
+ c_chmask capture channel mask
+ c_srate capture sampling rate
+ c_ssize capture sample size (bytes)
+ p_chmask playback channel mask
+ p_srate playback sampling rate
+ p_ssize playback sample size (bytes)
+ ========= ============================
KernelVersion: 4.0
Description: UVC function directory
- streaming_maxburst - 0..15 (ss only)
- streaming_maxpacket - 1..1023 (fs), 1..3072 (hs/ss)
- streaming_interval - 1..16
+ =================== =============================
+ streaming_maxburst 0..15 (ss only)
+ streaming_maxpacket 1..1023 (fs), 1..3072 (hs/ss)
+ streaming_interval 1..16
+ =================== =============================
What: /config/usb-gadget/gadget/functions/uvc.name/control
Date: Dec 2014
Description: Control descriptors
All attributes read only:
- bInterfaceNumber - USB interface number for this
- streaming interface
+
+ ================ =============================
+ bInterfaceNumber USB interface number for this
+ streaming interface
+ ================ =============================
What: /config/usb-gadget/gadget/functions/uvc.name/control/class
Date: Dec 2014
Description: Default output terminal descriptors
All attributes read only:
- iTerminal - index of string descriptor
- bSourceID - id of the terminal to which this terminal
+
+ ============== =============================================
+ iTerminal index of string descriptor
+ bSourceID id of the terminal to which this terminal
is connected
- bAssocTerminal - id of the input terminal to which this output
+ bAssocTerminal id of the input terminal to which this output
terminal is associated
- wTerminalType - terminal type
- bTerminalID - a non-zero id of this terminal
+ wTerminalType terminal type
+ bTerminalID a non-zero id of this terminal
+ ============== =============================================
What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/camera
Date: Dec 2014
Description: Default camera terminal descriptors
All attributes read only:
- bmControls - bitmap specifying which controls are
- supported for the video stream
- wOcularFocalLength - the value of Locular
- wObjectiveFocalLengthMax- the value of Lmin
- wObjectiveFocalLengthMin- the value of Lmax
- iTerminal - index of string descriptor
- bAssocTerminal - id of the output terminal to which
- this terminal is connected
- wTerminalType - terminal type
- bTerminalID - a non-zero id of this terminal
+
+ ======================== ====================================
+ bmControls bitmap specifying which controls are
+ supported for the video stream
+ wOcularFocalLength the value of Locular
+ wObjectiveFocalLengthMax the value of Lmin
+ wObjectiveFocalLengthMin the value of Lmax
+ iTerminal index of string descriptor
+ bAssocTerminal id of the output terminal to which
+ this terminal is connected
+ wTerminalType terminal type
+ bTerminalID a non-zero id of this terminal
+ ======================== ====================================
What: /config/usb-gadget/gadget/functions/uvc.name/control/processing
Date: Dec 2014
Description: Default processing unit descriptors
All attributes read only:
- iProcessing - index of string descriptor
- bmControls - bitmap specifying which controls are
+
+ =============== ========================================
+ iProcessing index of string descriptor
+ bmControls bitmap specifying which controls are
supported for the video stream
- wMaxMultiplier - maximum digital magnification x100
- bSourceID - id of the terminal to which this unit is
+ wMaxMultiplier maximum digital magnification x100
+ bSourceID id of the terminal to which this unit is
connected
- bUnitID - a non-zero id of this unit
+ bUnitID a non-zero id of this unit
+ =============== ========================================
What: /config/usb-gadget/gadget/functions/uvc.name/control/header
Date: Dec 2014
Description: Streaming descriptors
All attributes read only:
- bInterfaceNumber - USB interface number for this
- streaming interface
+
+ ================ =============================
+ bInterfaceNumber USB interface number for this
+ streaming interface
+ ================ =============================
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class
Date: Dec 2014
Description: Default color matching descriptors
All attributes read only:
- bMatrixCoefficients - matrix used to compute luma and
- chroma values from the color primaries
- bTransferCharacteristics- optoelectronic transfer
- characteristic of the source picutre,
- also called the gamma function
- bColorPrimaries - color primaries and the reference
- white
+
+ ======================== ======================================
+ bMatrixCoefficients matrix used to compute luma and
+ chroma values from the color primaries
+ bTransferCharacteristics optoelectronic transfer
+ characteristic of the source picutre,
+ also called the gamma function
+ bColorPrimaries color primaries and the reference
+ white
+ ======================== ======================================
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg
Date: Dec 2014
All attributes read only,
except bmaControls and bDefaultFrameIndex:
- bFormatIndex - unique id for this format descriptor;
+
+ =================== =====================================
+ bFormatIndex unique id for this format descriptor;
only defined after parent header is
linked into the streaming class;
read-only
- bmaControls - this format's data for bmaControls in
+ bmaControls this format's data for bmaControls in
the streaming header
- bmInterfaceFlags - specifies interlace information,
+ bmInterfaceFlags specifies interlace information,
read-only
- bAspectRatioY - the X dimension of the picture aspect
+ bAspectRatioY the X dimension of the picture aspect
ratio, read-only
- bAspectRatioX - the Y dimension of the picture aspect
+ bAspectRatioX the Y dimension of the picture aspect
ratio, read-only
- bmFlags - characteristics of this format,
+ bmFlags characteristics of this format,
read-only
- bDefaultFrameIndex - optimum frame index for this stream
+ bDefaultFrameIndex optimum frame index for this stream
+ =================== =====================================
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg/name/name
Date: Dec 2014
KernelVersion: 4.0
Description: Specific MJPEG frame descriptors
- bFrameIndex - unique id for this framedescriptor;
- only defined after parent format is
- linked into the streaming header;
- read-only
- dwFrameInterval - indicates how frame interval can be
- programmed; a number of values
- separated by newline can be specified
- dwDefaultFrameInterval - the frame interval the device would
- like to use as default
- dwMaxVideoFrameBufferSize- the maximum number of bytes the
- compressor will produce for a video
- frame or still image
- dwMaxBitRate - the maximum bit rate at the shortest
- frame interval in bps
- dwMinBitRate - the minimum bit rate at the longest
- frame interval in bps
- wHeight - height of decoded bitmap frame in px
- wWidth - width of decoded bitmam frame in px
- bmCapabilities - still image support, fixed frame-rate
- support
+ ========================= =====================================
+ bFrameIndex unique id for this framedescriptor;
+ only defined after parent format is
+ linked into the streaming header;
+ read-only
+ dwFrameInterval indicates how frame interval can be
+ programmed; a number of values
+ separated by newline can be specified
+ dwDefaultFrameInterval the frame interval the device would
+ like to use as default
+ dwMaxVideoFrameBufferSize the maximum number of bytes the
+ compressor will produce for a video
+ frame or still image
+ dwMaxBitRate the maximum bit rate at the shortest
+ frame interval in bps
+ dwMinBitRate the minimum bit rate at the longest
+ frame interval in bps
+ wHeight height of decoded bitmap frame in px
+ wWidth width of decoded bitmam frame in px
+ bmCapabilities still image support, fixed frame-rate
+ support
+ ========================= =====================================
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed
Date: Dec 2014
KernelVersion: 4.0
Description: Specific uncompressed format descriptors
- bFormatIndex - unique id for this format descriptor;
+ ================== =======================================
+ bFormatIndex unique id for this format descriptor;
only defined after parent header is
linked into the streaming class;
read-only
- bmaControls - this format's data for bmaControls in
+ bmaControls this format's data for bmaControls in
the streaming header
- bmInterfaceFlags - specifies interlace information,
+ bmInterfaceFlags specifies interlace information,
read-only
- bAspectRatioY - the X dimension of the picture aspect
+ bAspectRatioY the X dimension of the picture aspect
ratio, read-only
- bAspectRatioX - the Y dimension of the picture aspect
+ bAspectRatioX the Y dimension of the picture aspect
ratio, read-only
- bDefaultFrameIndex - optimum frame index for this stream
- bBitsPerPixel - number of bits per pixel used to
+ bDefaultFrameIndex optimum frame index for this stream
+ bBitsPerPixel number of bits per pixel used to
specify color in the decoded video
frame
- guidFormat - globally unique id used to identify
+ guidFormat globally unique id used to identify
stream-encoding format
+ ================== =======================================
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed/name/name
Date: Dec 2014
KernelVersion: 4.0
Description: Specific uncompressed frame descriptors
- bFrameIndex - unique id for this framedescriptor;
- only defined after parent format is
- linked into the streaming header;
- read-only
- dwFrameInterval - indicates how frame interval can be
- programmed; a number of values
- separated by newline can be specified
- dwDefaultFrameInterval - the frame interval the device would
- like to use as default
- dwMaxVideoFrameBufferSize- the maximum number of bytes the
- compressor will produce for a video
- frame or still image
- dwMaxBitRate - the maximum bit rate at the shortest
- frame interval in bps
- dwMinBitRate - the minimum bit rate at the longest
- frame interval in bps
- wHeight - height of decoded bitmap frame in px
- wWidth - width of decoded bitmam frame in px
- bmCapabilities - still image support, fixed frame-rate
- support
+ ========================= =====================================
+ bFrameIndex unique id for this framedescriptor;
+ only defined after parent format is
+ linked into the streaming header;
+ read-only
+ dwFrameInterval indicates how frame interval can be
+ programmed; a number of values
+ separated by newline can be specified
+ dwDefaultFrameInterval the frame interval the device would
+ like to use as default
+ dwMaxVideoFrameBufferSize the maximum number of bytes the
+ compressor will produce for a video
+ frame or still image
+ dwMaxBitRate the maximum bit rate at the shortest
+ frame interval in bps
+ dwMinBitRate the minimum bit rate at the longest
+ frame interval in bps
+ wHeight height of decoded bitmap frame in px
+ wWidth width of decoded bitmam frame in px
+ bmCapabilities still image support, fixed frame-rate
+ support
+ ========================= =====================================
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/header
Date: Dec 2014
Description: Specific streaming header descriptors
All attributes read only:
- bTriggerUsage - how the host software will respond to
+
+ ==================== =====================================
+ bTriggerUsage how the host software will respond to
a hardware trigger interrupt event
- bTriggerSupport - flag specifying if hardware
+ bTriggerSupport flag specifying if hardware
triggering is supported
- bStillCaptureMethod - method of still image caputre
+ bStillCaptureMethod method of still image caputre
supported
- bTerminalLink - id of the output terminal to which
+ bTerminalLink id of the output terminal to which
the video endpoint of this interface
is connected
- bmInfo - capabilities of this video streaming
+ bmInfo capabilities of this video streaming
interface
+ ==================== =====================================
What: /sys/class/udc/udc.name/device/gadget/video4linux/video.name/function_name
Date: May 2018
commands.
Note that the output of 'error-inj' shall be valid as input to 'error-inj'.
-So this must work:
+So this must work::
$ cat error-inj >einj.txt
$ cat einj.txt >error-inj
The user can supply a bitmask value, each bit represents
a different engine to disable/enable its clock gating feature.
The bitmask is composed of 20 bits:
- 0 - 7 : DMA channels
- 8 - 11 : MME engines
- 12 - 19 : TPC engines
+
+ ======= ============
+ 0 - 7 DMA channels
+ 8 - 11 MME engines
+ 12 - 19 TPC engines
+ ======= ============
+
The bit's location of a specific engine can be determined
using (1 << GAUDI_ENGINE_ID_*). GAUDI_ENGINE_ID_* values
are defined in uapi habanalabs.h file in enum gaudi_engine_id
the generic Linux user-space PCI mapping) because the DDR bar
is very small compared to the DDR memory and only the driver can
move the bar before and after the transaction.
+
If the IOMMU is disabled, it also allows the root user to read
or write from the host a device VA of a host mapped memory
the generic Linux user-space PCI mapping) because the DDR bar
is very small compared to the DDR memory and only the driver can
move the bar before and after the transaction.
+
If the IOMMU is disabled, it also allows the root user to read
or write from the host a device VA of a host mapped memory
General information like which GPE is assigned to the EC and whether
the global lock should get used.
Knowing the EC GPE one can watch the amount of HW events related to
-the EC here (XY -> GPE number from /sys/kernel/debug/ec/*/gpe):
+the EC here (XY -> GPE number from `/sys/kernel/debug/ec/*/gpe`):
/sys/firmware/acpi/interrupts/gpeXY
The io file is binary and a userspace tool located here:
should get used to read out the 256 Embedded Controller registers
or writing to them.
-CAUTION: Do not write to the Embedded Controller if you don't know
-what you are doing! Rebooting afterwards also is a good idea.
-This can influence the way your machine is cooled and fans may
-not get switched on again after you did a wrong write.
+CAUTION:
+ Do not write to the Embedded Controller if you don't know
+ what you are doing! Rebooting afterwards also is a good idea.
+ This can influence the way your machine is cooled and fans may
+ not get switched on again after you did a wrong write.
Date: March 2019
KernelVersion: 5.3
Contact: Marek Behún <marek.behun@nic.cz>
-Description: (R) Read input from the shift registers, in hexadecimal.
+Description: (Read) Read input from the shift registers, in hexadecimal.
Returns N+1 bytes, where N is the number of Moxtet connected
modules. The first byte is from the CPU board itself.
- Example: 101214
- 10: CPU board with SD card
- 12: 2 = PCIe module, 1 = IRQ not active
- 14: 4 = Peridot module, 1 = IRQ not active
+
+ Example::
+
+ 101214
+
+ == =======================================
+ 10 CPU board with SD card
+ 12 2 = PCIe module, 1 = IRQ not active
+ 14 4 = Peridot module, 1 = IRQ not active
+ == =======================================
What: /sys/kernel/debug/moxtet/output
Date: March 2019
Description: (RW) Read last written value to the shift registers, in
hexadecimal, or write values to the shift registers, also
in hexadecimal.
- Example: 0102
- 01: 01 was last written, or is to be written, to the
- first module's shift register
- 02: the same for second module
+
+ Example::
+
+ 0102
+
+ == ================================================
+ 01 01 was last written, or is to be written, to the
+ first module's shift register
+ 02 the same for second module
+ == ================================================
Contact: Kent Yoder <key@linux.vnet.ibm.com>
Description:
- These debugfs interfaces are built by the nx-crypto driver, built in
+These debugfs interfaces are built by the nx-crypto driver, built in
arch/powerpc/crypto/nx.
Error Detection
===============
errors:
-- A u32 providing a total count of errors since the driver was loaded. The
-only errors counted here are those returned from the hcall, H_COP_OP.
+ A u32 providing a total count of errors since the driver was loaded. The
+ only errors counted here are those returned from the hcall, H_COP_OP.
last_error:
-- The most recent non-zero return code from the H_COP_OP hcall. -EBUSY is not
-recorded here (the hcall will retry until -EBUSY goes away).
+ The most recent non-zero return code from the H_COP_OP hcall. -EBUSY is not
+ recorded here (the hcall will retry until -EBUSY goes away).
last_error_pid:
-- The process ID of the process who received the most recent error from the
-hcall.
+ The process ID of the process who received the most recent error from the
+ hcall.
Device Use
==========
aes_bytes:
-- The total number of bytes encrypted using AES in any of the driver's
-supported modes.
+ The total number of bytes encrypted using AES in any of the driver's
+ supported modes.
aes_ops:
-- The total number of AES operations submitted to the hardware.
+ The total number of AES operations submitted to the hardware.
sha256_bytes:
-- The total number of bytes hashed by the hardware using SHA-256.
+ The total number of bytes hashed by the hardware using SHA-256.
sha256_ops:
-- The total number of SHA-256 operations submitted to the hardware.
+ The total number of SHA-256 operations submitted to the hardware.
sha512_bytes:
-- The total number of bytes hashed by the hardware using SHA-512.
+ The total number of bytes hashed by the hardware using SHA-512.
sha512_ops:
-- The total number of SHA-512 operations submitted to the hardware.
+ The total number of SHA-512 operations submitted to the hardware.
Contact: Thomas Maier <balagi@justmail.de>
Description:
-debugfs interface
------------------
-
The pktcdvd module (packet writing driver) creates
these files in debugfs:
/sys/kernel/debug/pktcdvd/pktcdvd[0-7]/
- info (0444) Lots of driver statistics and infos.
-Example:
--------
+ ==== ====== ====================================
+ info 0444 Lots of driver statistics and infos.
+ ==== ====== ====================================
+
+Example::
-cat /sys/kernel/debug/pktcdvd/pktcdvd0/info
+ cat /sys/kernel/debug/pktcdvd/pktcdvd0/info
Date: Jun 2020
KernelVersion: 5.8
Contact: Marek Behún <marek.behun@nic.cz>
-Description: (W) Message to sign with the ECDSA private key stored in
- device's OTP. The message must be exactly 64 bytes (since
- this is intended for SHA-512 hashes).
- (R) The resulting signature, 136 bytes. This contains the R and
- S values of the ECDSA signature, both in big-endian format.
+Description:
+
+ ======= ===========================================================
+ (Write) Message to sign with the ECDSA private key stored in
+ device's OTP. The message must be exactly 64 bytes
+ (since this is intended for SHA-512 hashes).
+ (Read) The resulting signature, 136 bytes. This contains the
+ R and S values of the ECDSA signature, both in
+ big-endian format.
+ ======= ===========================================================
for writing, two for the type and at least a single byte of
data.
- Example:
- // Request EC info type 3 (EC firmware build date)
- // Corresponds with sending type 0x00f0 with
- // MBOX = [38, 00, 03, 00]
- $ echo 00 f0 38 00 03 00 > /sys/kernel/debug/wilco_ec/raw
- // View the result. The decoded ASCII result "12/21/18" is
- // included after the raw hex.
- // Corresponds with MBOX = [00, 00, 31, 32, 2f, 32, 31, 38, ...]
- $ cat /sys/kernel/debug/wilco_ec/raw
- 00 00 31 32 2f 32 31 2f 31 38 00 38 00 01 00 2f 00 ..12/21/18.8...
+ Example::
+
+ // Request EC info type 3 (EC firmware build date)
+ // Corresponds with sending type 0x00f0 with
+ // MBOX = [38, 00, 03, 00]
+ $ echo 00 f0 38 00 03 00 > /sys/kernel/debug/wilco_ec/raw
+ // View the result. The decoded ASCII result "12/21/18" is
+ // included after the raw hex.
+ // Corresponds with MBOX = [00, 00, 31, 32, 2f, 32, 31, 38, ...]
+ $ cat /sys/kernel/debug/wilco_ec/raw
+ 00 00 31 32 2f 32 31 2f 31 38 00 38 00 01 00 2f 00 ..12/21/18.8...
Note that the first 16 bytes of the received MBOX[] will be
printed, even if some of the data is junk, and skipping bytes
<uapi/linux/wmi.h>
1) To perform an SMBIOS call from userspace, you'll need to
- first determine the minimum size of the calling interface
- buffer for your machine.
- Platforms that contain larger buffers can return larger
- objects from the system firmware.
- Commonly this size is either 4k or 32k.
+ first determine the minimum size of the calling interface
+ buffer for your machine.
+ Platforms that contain larger buffers can return larger
+ objects from the system firmware.
+ Commonly this size is either 4k or 32k.
- To determine the size of the buffer read() a u64 dword from
- the WMI character device /dev/wmi/dell-smbios.
+ To determine the size of the buffer read() a u64 dword from
+ the WMI character device /dev/wmi/dell-smbios.
2) After you've determined the minimum size of the calling
- interface buffer, you can allocate a structure that represents
- the structure documented above.
+ interface buffer, you can allocate a structure that represents
+ the structure documented above.
3) In the 'length' object store the size of the buffer you
- determined above and allocated.
+ determined above and allocated.
4) In this buffer object, prepare as necessary for the SMBIOS
- call you're interested in. Typically SMBIOS buffers have
- "class", "select", and "input" defined to values that coincide
- with the data you are interested in.
- Documenting class/select/input values is outside of the scope
- of this documentation. Check with the libsmbios project for
- further documentation on these values.
+ call you're interested in. Typically SMBIOS buffers have
+ "class", "select", and "input" defined to values that coincide
+ with the data you are interested in.
+ Documenting class/select/input values is outside of the scope
+ of this documentation. Check with the libsmbios project for
+ further documentation on these values.
6) Run the call by using ioctl() as described in the header.
to the kernel's printk buffer.
Injecting messages:
+
Every write() to the opened device node places a log entry in
the kernel's printk buffer.
the messages can always be reliably determined.
Accessing the buffer:
+
Every read() from the opened device node receives one record
of the kernel's printk buffer.
if needed, without limiting the interface to a single reader.
The device supports seek with the following parameters:
+
SEEK_SET, 0
seek to the first entry in the buffer
SEEK_END, 0
readable context of the message, for reliable processing in
userspace.
- Example:
- 7,160,424069,-;pci_root PNP0A03:00: host bridge window [io 0x0000-0x0cf7] (ignored)
- SUBSYSTEM=acpi
- DEVICE=+acpi:PNP0A03:00
- 6,339,5140900,-;NET: Registered protocol family 10
- 30,340,5690716,-;udevd[80]: starting version 181
+ Example::
+
+ 7,160,424069,-;pci_root PNP0A03:00: host bridge window [io 0x0000-0x0cf7] (ignored)
+ SUBSYSTEM=acpi
+ DEVICE=+acpi:PNP0A03:00
+ 6,339,5140900,-;NET: Registered protocol family 10
+ 30,340,5690716,-;udevd[80]: starting version 181
The DEVICE= key uniquely identifies devices the following way:
- b12:8 - block dev_t
- c127:3 - char dev_t
- n8 - netdev ifindex
- +sound:card0 - subsystem:devname
+
+ ============ =================
+ b12:8 block dev_t
+ c127:3 char dev_t
+ n8 netdev ifindex
+ +sound:card0 subsystem:devname
+ ============ =================
The flags field carries '-' by default. A 'c' indicates a
fragment of a line. Note, that these hints about continuation
echoing a value to <securityfs>/evm made up of the
following bits:
+ === ==================================================
Bit Effect
+ === ==================================================
0 Enable HMAC validation and creation
1 Enable digital signature validation
2 Permit modification of EVM-protected metadata at
runtime. Not supported if HMAC validation and
creation is enabled.
31 Disable further runtime modification of EVM policy
+ === ==================================================
- For example:
+ For example::
- echo 1 ><securityfs>/evm
+ echo 1 ><securityfs>/evm
will enable HMAC validation and creation
- echo 0x80000003 ><securityfs>/evm
+ ::
+
+ echo 0x80000003 ><securityfs>/evm
will enable HMAC and digital signature validation and
HMAC creation and disable all further modification of policy.
- echo 0x80000006 ><securityfs>/evm
+ ::
+
+ echo 0x80000006 ><securityfs>/evm
will enable digital signature validation, permit
modification of EVM-protected metadata and
Shows the set of extended attributes used to calculate or
validate the EVM signature, and allows additional attributes
to be added at runtime. Any signatures generated after
- additional attributes are added (and on files posessing those
+ additional attributes are added (and on files possessing those
additional attributes) will only be valid if the same
additional attributes are configured on system boot. Writing
a single period (.) will lock the xattr list from any further
The following file operations are supported:
open(2)
- Currently the only useful flags are O_RDWR.
+ Currently the only useful flags are O_RDWR.
ioctl(2)
- Initiate various actions.
- See the inline documentation in [include/uapi]<linux/gpio.h>
- for descriptions of all ioctls.
+ Initiate various actions.
+
+ See the inline documentation in [include/uapi]<linux/gpio.h>
+ for descriptions of all ioctls.
close(2)
- Stops and free up the I/O contexts that was associated
- with the file descriptor.
+ Stops and free up the I/O contexts that was associated
+ with the file descriptor.
Users: TBD
IMA appraisal, if configured, uses these file measurements
for local measurement appraisal.
- rule format: action [condition ...]
+ ::
- action: measure | dont_measure | appraise | dont_appraise |
- audit | hash | dont_hash
- condition:= base | lsm [option]
+ rule format: action [condition ...]
+
+ action: measure | dont_measure | appraise | dont_appraise |
+ audit | hash | dont_hash
+ condition:= base | lsm [option]
base: [[func=] [mask=] [fsmagic=] [fsuuid=] [uid=]
[euid=] [fowner=] [fsname=]]
lsm: [[subj_user=] [subj_role=] [subj_type=]
[obj_user=] [obj_role=] [obj_type=]]
option: [[appraise_type=]] [template=] [permit_directio]
[appraise_flag=] [keyrings=]
- base: func:= [BPRM_CHECK][MMAP_CHECK][CREDS_CHECK][FILE_CHECK][MODULE_CHECK]
- [FIRMWARE_CHECK]
+ base:
+ func:= [BPRM_CHECK][MMAP_CHECK][CREDS_CHECK][FILE_CHECK]MODULE_CHECK]
+ [FIRMWARE_CHECK]
[KEXEC_KERNEL_CHECK] [KEXEC_INITRAMFS_CHECK]
[KEXEC_CMDLINE] [KEY_CHECK]
mask:= [[^]MAY_READ] [[^]MAY_WRITE] [[^]MAY_APPEND]
uid:= decimal value
euid:= decimal value
fowner:= decimal value
- lsm: are LSM specific
- option: appraise_type:= [imasig] [imasig|modsig]
+ lsm: are LSM specific
+ option:
+ appraise_type:= [imasig] [imasig|modsig]
appraise_flag:= [check_blacklist]
Currently, blacklist check is only for files signed with appended
signature.
(eg, ima-ng). Only valid when action is "measure".
pcr:= decimal value
- default policy:
+ default policy:
# PROC_SUPER_MAGIC
dont_measure fsmagic=0x9fa0
dont_appraise fsmagic=0x9fa0
Examples of LSM specific definitions:
- SELinux:
+ SELinux::
+
dont_measure obj_type=var_log_t
dont_appraise obj_type=var_log_t
dont_measure obj_type=auditd_log_t
measure subj_user=system_u func=FILE_CHECK mask=MAY_READ
measure subj_role=system_r func=FILE_CHECK mask=MAY_READ
- Smack:
+ Smack::
+
measure subj_user=_ func=FILE_CHECK mask=MAY_READ
- Example of measure rules using alternate PCRs:
+ Example of measure rules using alternate PCRs::
measure func=KEXEC_KERNEL_CHECK pcr=4
measure func=KEXEC_INITRAMFS_CHECK pcr=5
of block devices. Each line contains the following 14
fields:
- 1 - major number
- 2 - minor mumber
- 3 - device name
- 4 - reads completed successfully
- 5 - reads merged
- 6 - sectors read
- 7 - time spent reading (ms)
- 8 - writes completed
- 9 - writes merged
- 10 - sectors written
- 11 - time spent writing (ms)
- 12 - I/Os currently in progress
- 13 - time spent doing I/Os (ms)
- 14 - weighted time spent doing I/Os (ms)
+ == ===================================
+ 1 major number
+ 2 minor mumber
+ 3 device name
+ 4 reads completed successfully
+ 5 reads merged
+ 6 sectors read
+ 7 time spent reading (ms)
+ 8 writes completed
+ 9 writes merged
+ 10 sectors written
+ 11 time spent writing (ms)
+ 12 I/Os currently in progress
+ 13 time spent doing I/Os (ms)
+ 14 weighted time spent doing I/Os (ms)
+ == ===================================
Kernel 4.18+ appends four more fields for discard
tracking putting the total at 18:
- 15 - discards completed successfully
- 16 - discards merged
- 17 - sectors discarded
- 18 - time spent discarding
+ == ===================================
+ 15 discards completed successfully
+ 16 discards merged
+ 17 sectors discarded
+ 18 time spent discarding
+ == ===================================
Kernel 5.5+ appends two more fields for flush requests:
- 19 - flush requests completed successfully
- 20 - time spent flushing
+ == =====================================
+ 19 flush requests completed successfully
+ 20 time spent flushing
+ == =====================================
For more details refer to Documentation/admin-guide/iostats.rst
For more details, see Documentation/filesystems/proc.rst
and the procfs man page.
- Typical output looks like this:
+ Typical output looks like this::
- 00100000-ff709000 ---p 00000000 00:00 0 [rollup]
- Size: 1192 kB
- KernelPageSize: 4 kB
- MMUPageSize: 4 kB
- Rss: 884 kB
- Pss: 385 kB
- Pss_Anon: 301 kB
- Pss_File: 80 kB
- Pss_Shmem: 4 kB
- Shared_Clean: 696 kB
- Shared_Dirty: 0 kB
- Private_Clean: 120 kB
- Private_Dirty: 68 kB
- Referenced: 884 kB
- Anonymous: 68 kB
- LazyFree: 0 kB
- AnonHugePages: 0 kB
- ShmemPmdMapped: 0 kB
- Shared_Hugetlb: 0 kB
- Private_Hugetlb: 0 kB
- Swap: 0 kB
- SwapPss: 0 kB
- Locked: 385 kB
+ 00100000-ff709000 ---p 00000000 00:00 0 [rollup]
+ Size: 1192 kB
+ KernelPageSize: 4 kB
+ MMUPageSize: 4 kB
+ Rss: 884 kB
+ Pss: 385 kB
+ Pss_Anon: 301 kB
+ Pss_File: 80 kB
+ Pss_Shmem: 4 kB
+ Shared_Clean: 696 kB
+ Shared_Dirty: 0 kB
+ Private_Clean: 120 kB
+ Private_Dirty: 68 kB
+ Referenced: 884 kB
+ Anonymous: 68 kB
+ LazyFree: 0 kB
+ AnonHugePages: 0 kB
+ ShmemPmdMapped: 0 kB
+ Shared_Hugetlb: 0 kB
+ Private_Hugetlb: 0 kB
+ Swap: 0 kB
+ SwapPss: 0 kB
+ Locked: 385 kB
provide a generic interface to show records captured in
the dying moments. In the case of a panic the last part
of the console log is captured, but other interesting
- data can also be saved.
+ data can also be saved::
- # mount -t pstore -o kmsg_bytes=8000 - /sys/fs/pstore
+ # mount -t pstore -o kmsg_bytes=8000 - /sys/fs/pstore
- $ ls -l /sys/fs/pstore/
- total 0
- -r--r--r-- 1 root root 7896 Nov 30 15:38 dmesg-erst-1
+ $ ls -l /sys/fs/pstore/
+ total 0
+ -r--r--r-- 1 root root 7896 Nov 30 15:38 dmesg-erst-1
Different users of this interface will result in different
filename prefixes. Currently two are defined:
- "dmesg" - saved console log
- "mce" - architecture dependent data from fatal h/w error
+ - "dmesg" - saved console log
+ - "mce" - architecture dependent data from fatal h/w error
Once the information in a file has been read, removing
the file will signal to the underlying persistent storage
- device that it can reclaim the space for later re-use.
+ device that it can reclaim the space for later re-use::
- $ rm /sys/fs/pstore/dmesg-erst-1
+ $ rm /sys/fs/pstore/dmesg-erst-1
The expectation is that all files in /sys/fs/pstore/
will be saved elsewhere and erased from persistent store
backends are available, the preferred backend may be
set by passing the pstore.backend= argument to the kernel at
boot time.
-
Description:
The /sys/block/<disk>/stat files displays the I/O
statistics of disk <disk>. They contain 11 fields:
- 1 - reads completed successfully
- 2 - reads merged
- 3 - sectors read
- 4 - time spent reading (ms)
- 5 - writes completed
- 6 - writes merged
- 7 - sectors written
- 8 - time spent writing (ms)
- 9 - I/Os currently in progress
- 10 - time spent doing I/Os (ms)
- 11 - weighted time spent doing I/Os (ms)
- 12 - discards completed
- 13 - discards merged
- 14 - sectors discarded
- 15 - time spent discarding (ms)
- 16 - flush requests completed
- 17 - time spent flushing (ms)
+
+ == ==============================================
+ 1 reads completed successfully
+ 2 reads merged
+ 3 sectors read
+ 4 time spent reading (ms)
+ 5 writes completed
+ 6 writes merged
+ 7 sectors written
+ 8 time spent writing (ms)
+ 9 I/Os currently in progress
+ 10 time spent doing I/Os (ms)
+ 11 weighted time spent doing I/Os (ms)
+ 12 discards completed
+ 13 discards merged
+ 14 sectors discarded
+ 15 time spent discarding (ms)
+ 16 flush requests completed
+ 17 time spent flushing (ms)
+ == ==============================================
+
For more details refer Documentation/admin-guide/iostats.rst
It has the following valid values:
+ == ========================================================
0 OFF - the LED is not activated on activity
1 BLINK_ON - the LED blinks on every 10ms when activity is
detected.
2 BLINK_OFF - the LED is on when idle, and blinks off
every 10ms when activity is detected.
+ == ========================================================
Note that the user must turn sw_activity OFF it they wish to
control the activity LED via the em_message file.
is using the device. When "force" is used, the device is also unmapped
when device is in use. All I/Os that are in progress will fail.
- Example:
+ Example::
- # echo "normal" > /sys/block/rnbd0/rnbd/unmap_device
+ # echo "normal" > /sys/block/rnbd0/rnbd/unmap_device
What: /sys/block/rnbd<N>/rnbd/state
Date: Feb 2020
This attribute indicates the full path of ACPI namespace
object associated with the device object. For example,
\_SB_.PCI0.
+
This file is not present for device objects representing
fixed ACPI hardware features (like power and sleep
buttons).
The return value is a decimal integer representing the device's
status bitmap:
- Bit [0] – Set if the device is present.
- Bit [1] – Set if the device is enabled and decoding its
- resources.
- Bit [2] – Set if the device should be shown in the UI.
- Bit [3] – Set if the device is functioning properly (cleared if
- device failed its diagnostics).
- Bit [4] – Set if the battery is present.
- Bits [31:5] – Reserved (must be cleared)
+ =========== ==================================================
+ Bit [0] Set if the device is present.
+ Bit [1] Set if the device is enabled and decoding its
+ resources.
+ Bit [2] Set if the device should be shown in the UI.
+ Bit [3] Set if the device is functioning properly (cleared
+ if device failed its diagnostics).
+ Bit [4] Set if the battery is present.
+ Bits [31:5] Reserved (must be cleared)
+ =========== ==================================================
If bit [0] is clear, then bit 1 must also be clear (a device
that is not present cannot be enabled).
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (R) Indicate if the CTI hardware is powered.
+Description: (Read) Indicate if the CTI hardware is powered.
What: /sys/bus/coresight/devices/<cti-name>/ctmid
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (R) Display the associated CTM ID
+Description: (Read) Display the associated CTM ID
What: /sys/bus/coresight/devices/<cti-name>/nr_trigger_cons
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (R) Number of devices connected to triggers on this CTI
+Description: (Read) Number of devices connected to triggers on this CTI
What: /sys/bus/coresight/devices/<cti-name>/triggers<N>/name
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (R) Name of connected device <N>
+Description: (Read) Name of connected device <N>
What: /sys/bus/coresight/devices/<cti-name>/triggers<N>/in_signals
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (R) Input trigger signals from connected device <N>
+Description: (Read) Input trigger signals from connected device <N>
What: /sys/bus/coresight/devices/<cti-name>/triggers<N>/in_types
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (R) Functional types for the input trigger signals
+Description: (Read) Functional types for the input trigger signals
from connected device <N>
What: /sys/bus/coresight/devices/<cti-name>/triggers<N>/out_signals
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (R) Output trigger signals to connected device <N>
+Description: (Read) Output trigger signals to connected device <N>
What: /sys/bus/coresight/devices/<cti-name>/triggers<N>/out_types
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (R) Functional types for the output trigger signals
+Description: (Read) Functional types for the output trigger signals
to connected device <N>
What: /sys/bus/coresight/devices/<cti-name>/regs/inout_sel
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (W) Write the INTACK register.
+Description: (Write) Write the INTACK register.
What: /sys/bus/coresight/devices/<cti-name>/regs/appset
Date: March 2020
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (W) Write APPCLEAR register to deactivate channel.
+Description: (Write) Write APPCLEAR register to deactivate channel.
What: /sys/bus/coresight/devices/<cti-name>/regs/apppulse
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (W) Write APPPULSE to pulse a channel active for one clock
+Description: (Write) Write APPPULSE to pulse a channel active for one clock
cycle.
What: /sys/bus/coresight/devices/<cti-name>/regs/chinstatus
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (R) Read current status of channel inputs.
+Description: (Read) Read current status of channel inputs.
What: /sys/bus/coresight/devices/<cti-name>/regs/choutstatus
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (R) read current status of channel outputs.
+Description: (Read) read current status of channel outputs.
What: /sys/bus/coresight/devices/<cti-name>/regs/triginstatus
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (R) read current status of input trigger signals
+Description: (Read) read current status of input trigger signals
What: /sys/bus/coresight/devices/<cti-name>/regs/trigoutstatus
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (R) read current status of output trigger signals.
+Description: (Read) read current status of output trigger signals.
What: /sys/bus/coresight/devices/<cti-name>/channels/trigin_attach
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (W) Attach a CTI input trigger to a CTM channel.
+Description: (Write) Attach a CTI input trigger to a CTM channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/trigin_detach
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (W) Detach a CTI input trigger from a CTM channel.
+Description: (Write) Detach a CTI input trigger from a CTM channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/trigout_attach
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (W) Attach a CTI output trigger to a CTM channel.
+Description: (Write) Attach a CTI output trigger to a CTM channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/trigout_detach
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (W) Detach a CTI output trigger from a CTM channel.
+Description: (Write) Detach a CTI output trigger from a CTM channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_gate_enable
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (RW) Enable CTIGATE for single channel (W) or list enabled
+Description: (RW) Enable CTIGATE for single channel (Write) or list enabled
channels through the gate (R).
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_gate_disable
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (W) Disable CTIGATE for single channel.
+Description: (Write) Disable CTIGATE for single channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_set
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (W) Activate a single channel.
+Description: (Write) Activate a single channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_clear
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (W) Deactivate a single channel.
+Description: (Write) Deactivate a single channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_pulse
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (W) Pulse a single channel - activate for a single clock cycle.
+Description: (Write) Pulse a single channel - activate for a single clock cycle.
What: /sys/bus/coresight/devices/<cti-name>/channels/trigout_filtered
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (R) List of output triggers filtered across all connections.
+Description: (Read) List of output triggers filtered across all connections.
What: /sys/bus/coresight/devices/<cti-name>/channels/trig_filter_enable
Date: March 2020
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (R) show channels with at least one attached trigger signal.
+Description: (Read) show channels with at least one attached trigger signal.
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_free
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (R) show channels with no attached trigger signals.
+Description: (Read) show channels with no attached trigger signals.
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_xtrigs_sel
Date: March 2020
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (R) Read to see input triggers connected to selected view
+Description: (Read) Read to see input triggers connected to selected view
channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_xtrigs_out
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (R) Read to see output triggers connected to selected view
+Description: (Read) Read to see output triggers connected to selected view
channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_xtrigs_reset
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
-Description: (W) Clear all channel / trigger programming.
+Description: (Write) Clear all channel / trigger programming.
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (RW) Add/remove a sink from a trace path. There can be multiple
source for a single sink.
- ex: echo 1 > /sys/bus/coresight/devices/20010000.etb/enable_sink
+
+ ex::
+
+ echo 1 > /sys/bus/coresight/devices/20010000.etb/enable_sink
What: /sys/bus/coresight/devices/<memory_map>.etb/trigger_cntr
Date: November 2014
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Defines the depth, in words, of the trace RAM in powers of
+Description: (Read) Defines the depth, in words, of the trace RAM in powers of
2. The value is read directly from HW register RDP, 0x004.
What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/sts
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Shows the value held by the ETB status register. The value
+Description: (Read) Shows the value held by the ETB status register. The value
is read directly from HW register STS, 0x00C.
What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/rrp
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Shows the value held by the ETB RAM Read Pointer register
+Description: (Read) Shows the value held by the ETB RAM Read Pointer register
that is used to read entries from the Trace RAM over the APB
interface. The value is read directly from HW register RRP,
0x014.
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Shows the value held by the ETB RAM Write Pointer register
+Description: (Read) Shows the value held by the ETB RAM Write Pointer register
that is used to sets the write pointer to write entries from
the CoreSight bus into the Trace RAM. The value is read directly
from HW register RWP, 0x018.
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Similar to "trigger_cntr" above except that this value is
+Description: (Read) Similar to "trigger_cntr" above except that this value is
read directly from HW register TRG, 0x01C.
What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/ctl
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Shows the value held by the ETB Control register. The value
+Description: (Read) Shows the value held by the ETB Control register. The value
is read directly from HW register CTL, 0x020.
What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/ffsr
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Shows the value held by the ETB Formatter and Flush Status
+Description: (Read) Shows the value held by the ETB Formatter and Flush Status
register. The value is read directly from HW register FFSR,
0x300.
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Shows the value held by the ETB Formatter and Flush Control
+Description: (Read) Shows the value held by the ETB Formatter and Flush Control
register. The value is read directly from HW register FFCR,
0x304.
Date: November 2014
KernelVersion: 3.19
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Provides the number of address comparators pairs accessible
+Description: (Read) Provides the number of address comparators pairs accessible
on a trace unit, as specified by bit 3:0 of register ETMCCR.
What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/nr_cntr
Date: November 2014
KernelVersion: 3.19
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Provides the number of counters accessible on a trace unit,
+Description: (Read) Provides the number of counters accessible on a trace unit,
as specified by bit 15:13 of register ETMCCR.
What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/nr_ctxid_cmp
Date: November 2014
KernelVersion: 3.19
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Provides the number of context ID comparator available on a
+Description: (Read) Provides the number of context ID comparator available on a
trace unit, as specified by bit 25:24 of register ETMCCR.
What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/reset
Date: November 2014
KernelVersion: 3.19
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (W) Cancels all configuration on a trace unit and set it back
+Description: (Write) Cancels all configuration on a trace unit and set it back
to its boot configuration.
What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/seq_12_event
Date: November 2014
KernelVersion: 3.19
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Holds the current state of the sequencer.
+Description: (Read) Holds the current state of the sequencer.
What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/sync_freq
Date: November 2014
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) The CPU this tracing entity is associated with.
+Description: (Read) The CPU this tracing entity is associated with.
What: /sys/bus/coresight/devices/etm<N>/nr_pe_cmp
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Indicates the number of PE comparator inputs that are
+Description: (Read) Indicates the number of PE comparator inputs that are
available for tracing.
What: /sys/bus/coresight/devices/etm<N>/nr_addr_cmp
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Indicates the number of address comparator pairs that are
+Description: (Read) Indicates the number of address comparator pairs that are
available for tracing.
What: /sys/bus/coresight/devices/etm<N>/nr_cntr
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Indicates the number of counters that are available for
+Description: (Read) Indicates the number of counters that are available for
tracing.
What: /sys/bus/coresight/devices/etm<N>/nr_ext_inp
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Indicates how many external inputs are implemented.
+Description: (Read) Indicates how many external inputs are implemented.
What: /sys/bus/coresight/devices/etm<N>/numcidc
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Indicates the number of Context ID comparators that are
+Description: (Read) Indicates the number of Context ID comparators that are
available for tracing.
What: /sys/bus/coresight/devices/etm<N>/numvmidc
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Indicates the number of VMID comparators that are available
+Description: (Read) Indicates the number of VMID comparators that are available
for tracing.
What: /sys/bus/coresight/devices/etm<N>/nrseqstate
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Indicates the number of sequencer states that are
+Description: (Read) Indicates the number of sequencer states that are
implemented.
What: /sys/bus/coresight/devices/etm<N>/nr_resource
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Indicates the number of resource selection pairs that are
+Description: (Read) Indicates the number of resource selection pairs that are
available for tracing.
What: /sys/bus/coresight/devices/etm<N>/nr_ss_cmp
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Indicates the number of single-shot comparator controls that
+Description: (Read) Indicates the number of single-shot comparator controls that
are available for tracing.
What: /sys/bus/coresight/devices/etm<N>/reset
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (W) Cancels all configuration on a trace unit and set it back
+Description: (Write) Cancels all configuration on a trace unit and set it back
to its boot configuration.
What: /sys/bus/coresight/devices/etm<N>/mode
Date: December 2019
KernelVersion: 5.5
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Print the current settings for the selected address
+Description: (Read) Print the current settings for the selected address
comparator.
What: /sys/bus/coresight/devices/etm<N>/sshot_idx
Date: December 2019
KernelVersion: 5.5
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Print the current value of the selected single shot
+Description: (Read) Print the current value of the selected single shot
status register.
What: /sys/bus/coresight/devices/etm<N>/sshot_pe_ctrl
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Print the content of the OS Lock Status Register (0x304).
+Description: (Read) Print the content of the OS Lock Status Register (0x304).
The value it taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcpdcr
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Print the content of the Power Down Control Register
+Description: (Read) Print the content of the Power Down Control Register
(0x310). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcpdsr
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Print the content of the Power Down Status Register
+Description: (Read) Print the content of the Power Down Status Register
(0x314). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trclsr
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Print the content of the SW Lock Status Register
+Description: (Read) Print the content of the SW Lock Status Register
(0xFB4). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcauthstatus
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Print the content of the Authentication Status Register
+Description: (Read) Print the content of the Authentication Status Register
(0xFB8). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcdevid
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Print the content of the Device ID Register
+Description: (Read) Print the content of the Device ID Register
(0xFC8). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcdevtype
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Print the content of the Device Type Register
+Description: (Read) Print the content of the Device Type Register
(0xFCC). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcpidr0
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Print the content of the Peripheral ID0 Register
+Description: (Read) Print the content of the Peripheral ID0 Register
(0xFE0). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcpidr1
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Print the content of the Peripheral ID1 Register
+Description: (Read) Print the content of the Peripheral ID1 Register
(0xFE4). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcpidr2
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Print the content of the Peripheral ID2 Register
+Description: (Read) Print the content of the Peripheral ID2 Register
(0xFE8). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcpidr3
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Print the content of the Peripheral ID3 Register
+Description: (Read) Print the content of the Peripheral ID3 Register
(0xFEC). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcconfig
Date: February 2016
KernelVersion: 4.07
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Print the content of the trace configuration register
+Description: (Read) Print the content of the trace configuration register
(0x010) as currently set by SW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trctraceid
Date: February 2016
KernelVersion: 4.07
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Print the content of the trace ID register (0x040).
+Description: (Read) Print the content of the trace ID register (0x040).
What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr0
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Returns the tracing capabilities of the trace unit (0x1E0).
+Description: (Read) Returns the tracing capabilities of the trace unit (0x1E0).
The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr1
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Returns the tracing capabilities of the trace unit (0x1E4).
+Description: (Read) Returns the tracing capabilities of the trace unit (0x1E4).
The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr2
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Returns the maximum size of the data value, data address,
+Description: (Read) Returns the maximum size of the data value, data address,
VMID, context ID and instuction address in the trace unit
(0x1E8). The value is taken directly from the HW.
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Returns the value associated with various resources
+Description: (Read) Returns the value associated with various resources
available to the trace unit. See the Trace Macrocell
architecture specification for more details (0x1E8).
The value is taken directly from the HW.
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Returns how many resources the trace unit supports (0x1F0).
+Description: (Read) Returns how many resources the trace unit supports (0x1F0).
The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr5
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Returns how many resources the trace unit supports (0x1F4).
+Description: (Read) Returns how many resources the trace unit supports (0x1F4).
The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr8
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Returns the maximum speculation depth of the instruction
+Description: (Read) Returns the maximum speculation depth of the instruction
trace stream. (0x180). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr9
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Returns the number of P0 right-hand keys that the trace unit
+Description: (Read) Returns the number of P0 right-hand keys that the trace unit
can use (0x184). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr10
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Returns the number of P1 right-hand keys that the trace unit
+Description: (Read) Returns the number of P1 right-hand keys that the trace unit
can use (0x188). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr11
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Returns the number of special P1 right-hand keys that the
+Description: (Read) Returns the number of special P1 right-hand keys that the
trace unit can use (0x18C). The value is taken directly from
the HW.
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Returns the number of conditional P1 right-hand keys that
+Description: (Read) Returns the number of conditional P1 right-hand keys that
the trace unit can use (0x190). The value is taken directly
from the HW.
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Returns the number of special conditional P1 right-hand keys
+Description: (Read) Returns the number of special conditional P1 right-hand keys
that the trace unit can use (0x194). The value is taken
directly from the HW.
Date: April 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) List various control and status registers. The specific
+Description: (Read) List various control and status registers. The specific
layout and content is driver specific.
What: /sys/bus/coresight/devices/<memory_map>.stm/traceid
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Defines the size, in 32-bit words, of the local RAM buffer.
+Description: (Read) Defines the size, in 32-bit words, of the local RAM buffer.
The value is read directly from HW register RSZ, 0x004.
What: /sys/bus/coresight/devices/<memory_map>.tmc/mgmt/sts
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Shows the value held by the TMC status register. The value
+Description: (Read) Shows the value held by the TMC status register. The value
is read directly from HW register STS, 0x00C.
What: /sys/bus/coresight/devices/<memory_map>.tmc/mgmt/rrp
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Shows the value held by the TMC RAM Read Pointer register
+Description: (Read) Shows the value held by the TMC RAM Read Pointer register
that is used to read entries from the Trace RAM over the APB
interface. The value is read directly from HW register RRP,
0x014.
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Shows the value held by the TMC RAM Write Pointer register
+Description: (Read) Shows the value held by the TMC RAM Write Pointer register
that is used to sets the write pointer to write entries from
the CoreSight bus into the Trace RAM. The value is read directly
from HW register RWP, 0x018.
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Similar to "trigger_cntr" above except that this value is
+Description: (Read) Similar to "trigger_cntr" above except that this value is
read directly from HW register TRG, 0x01C.
What: /sys/bus/coresight/devices/<memory_map>.tmc/mgmt/ctl
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Shows the value held by the TMC Control register. The value
+Description: (Read) Shows the value held by the TMC Control register. The value
is read directly from HW register CTL, 0x020.
What: /sys/bus/coresight/devices/<memory_map>.tmc/mgmt/ffsr
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Shows the value held by the TMC Formatter and Flush Status
+Description: (Read) Shows the value held by the TMC Formatter and Flush Status
register. The value is read directly from HW register FFSR,
0x300.
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Shows the value held by the TMC Formatter and Flush Control
+Description: (Read) Shows the value held by the TMC Formatter and Flush Control
register. The value is read directly from HW register FFCR,
0x304.
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Shows the value held by the TMC Mode register, which
+Description: (Read) Shows the value held by the TMC Mode register, which
indicate the mode the device has been configured to enact. The
The value is read directly from the MODE register, 0x028.
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
-Description: (R) Indicates the capabilities of the Coresight TMC.
+Description: (Read) Indicates the capabilities of the Coresight TMC.
The value is read directly from the DEVID register, 0xFC8,
What: /sys/bus/coresight/devices/<memory_map>.tmc/buffer_size
Description: Contains the ids of the channel paths used by this
subchannel, as reported by the channel subsystem
during subchannel recognition.
+
Note: This is an I/O-subchannel specific attribute.
Users: s390-tools, HAL
channel subsystem when last queried by the common I/O
layer (this implies that this attribute is not necessarily
in sync with the values current in the channel subsystem).
+
Note: This is an I/O-subchannel specific attribute.
Users: s390-tools, HAL
opt-out of driver binding using a driver_override name such as
"none". Only a single driver may be specified in the override,
there is no support for parsing delimiters.
+
Note that unlike the mechanism of the same name for pci, this
file does not allow to override basic matching rules. I.e.,
the driver must still match the subchannel type of the device.
Contact: Xu Yilun <yilun.xu@intel.com>
Description: Read-only. It returns type of DFL FIU of the device. Now DFL
supports 2 FIU types, 0 for FME, 1 for PORT.
+
Format: 0x%x
What: /sys/bus/dfl/devices/dfl_dev.X/feature_id
Contact: Xu Yilun <yilun.xu@intel.com>
Description: Read-only. It returns feature identifier local to its DFL FIU
type.
+
Format: 0x%x
Each attribute under this group defines a bit range of the
perf_event_attr.config. All supported attributes are listed
- below.
+ below::
event = "config:0-11" - event ID
evtype = "config:12-15" - event type
portid = "config:16-23" - event source
- For example,
+ For example::
fab_mmio_read = "event=0x06,evtype=0x02,portid=0xff"
All supported performance monitoring events are listed below.
- Basic events (evtype=0x00)
+ Basic events (evtype=0x00)::
clock = "event=0x00,evtype=0x00,portid=0xff"
- Cache events (evtype=0x01)
+ Cache events (evtype=0x01)::
cache_read_hit = "event=0x00,evtype=0x01,portid=0xff"
cache_read_miss = "event=0x01,evtype=0x01,portid=0xff"
cache_rx_req_stall = "event=0x09,evtype=0x01,portid=0xff"
cache_eviction = "event=0x0a,evtype=0x01,portid=0xff"
- Fabric events (evtype=0x02)
+ Fabric events (evtype=0x02)::
fab_pcie0_read = "event=0x00,evtype=0x02,portid=0xff"
fab_pcie0_write = "event=0x01,evtype=0x02,portid=0xff"
fab_port_mmio_read = "event=0x06,evtype=0x02,portid=?"
fab_port_mmio_write = "event=0x07,evtype=0x02,portid=?"
- VTD events (evtype=0x03)
+ VTD events (evtype=0x03)::
vtd_port_read_transaction = "event=0x00,evtype=0x03,portid=?"
vtd_port_write_transaction = "event=0x01,evtype=0x03,portid=?"
vtd_port_devtlb_2m_fill = "event=0x05,evtype=0x03,portid=?"
vtd_port_devtlb_1g_fill = "event=0x06,evtype=0x03,portid=?"
- VTD SIP events (evtype=0x04)
+ VTD SIP events (evtype=0x04)::
vtd_sip_iotlb_4k_hit = "event=0x00,evtype=0x04,portid=0xff"
vtd_sip_iotlb_2m_hit = "event=0x01,evtype=0x04,portid=0xff"
name/value pairs.
Userspace must be prepared for the possibility that attributes
- define overlapping bit ranges. For example:
+ define overlapping bit ranges. For example::
+
attr1 = 'config:0-23'
attr2 = 'config:0-7'
attr3 = 'config:12-35'
Each attribute under this group defines a bit range of the
perf_event_attr.config. All supported attributes are listed
- below.
+ below::
chip = "config:16-31"
core = "config:16-31"
offset = "config:32-63"
vcpu = "config:16-31"
- For example,
+ For example::
- PM_PB_CYC = "domain=1,offset=0x80,chip=?,lpar=0x0"
+ PM_PB_CYC = "domain=1,offset=0x80,chip=?,lpar=0x0"
In this event, '?' after chip specifies that
this value will be provided by user while running this event.
Each attribute under this group defines a bit range of the
perf_event_attr.config. All supported attributes are listed
- below.
+ below::
counter_info_version = "config:16-23"
length = "config:24-31"
secondary_index = "config:0-15"
starting_index = "config:32-63"
- For example,
+ For example::
- processor_core_utilization_instructions_completed = "request=0x94,
+ processor_core_utilization_instructions_completed = "request=0x94,
phys_processor_idx=?,counter_info_version=0x8,
length=8,offset=0x18"
'0' if the hypervisor is configured to forbid access to event
counters being accumulated by other guests and to physical
domain event counters.
+
'1' if that access is allowed.
What: /sys/bus/event_source/devices/hv_gpci/interface/ga
KernelVersion: TBD
Contact: Robert Love <robert.w.love@intel.com>, devel@open-fcoe.org
Description: The FCoE bus. Attributes in this directory are control interfaces.
+
Attributes:
- ctlr_create: 'FCoE Controller' instance creation interface. Writing an
+ ctlr_create:
+ 'FCoE Controller' instance creation interface. Writing an
<ifname> to this file will allocate and populate sysfs with a
fcoe_ctlr_device (ctlr_X). The user can then configure any
per-port settings and finally write to the fcoe_ctlr_device's
'start' attribute to begin the kernel's discovery and login
process.
- ctlr_destroy: 'FCoE Controller' instance removal interface. Writing a
+ ctlr_destroy:
+ 'FCoE Controller' instance removal interface. Writing a
fcoe_ctlr_device's sysfs name to this file will log the
fcoe_ctlr_device out of the fabric or otherwise connected
FCoE devices. It will also free all kernel memory allocated
Attributes:
- fcf_dev_loss_tmo: Device loss timeout period (see below). Changing
+ fcf_dev_loss_tmo:
+ Device loss timeout period (see below). Changing
this value will change the dev_loss_tmo for all
FCFs discovered by this controller.
- mode: Display or change the FCoE Controller's mode. Possible
+ mode:
+ Display or change the FCoE Controller's mode. Possible
modes are 'Fabric' and 'VN2VN'. If a FCoE Controller
is started in 'Fabric' mode then FIP FCF discovery is
initiated and ultimately a fabric login is attempted.
FIP VN2VN discovery and login is performed. A FCoE
Controller only supports one mode at a time.
- enabled: Whether an FCoE controller is enabled or disabled.
+ enabled:
+ Whether an FCoE controller is enabled or disabled.
0 if disabled, 1 if enabled. Writing either 0 or 1
to this file will enable or disable the FCoE controller.
- lesb/link_fail: Link Error Status Block (LESB) link failure count.
+ lesb/link_fail:
+ Link Error Status Block (LESB) link failure count.
- lesb/vlink_fail: Link Error Status Block (LESB) virtual link
+ lesb/vlink_fail:
+ Link Error Status Block (LESB) virtual link
failure count.
- lesb/miss_fka: Link Error Status Block (LESB) missed FCoE
+ lesb/miss_fka:
+ Link Error Status Block (LESB) missed FCoE
Initialization Protocol (FIP) Keep-Alives (FKA).
- lesb/symb_err: Link Error Status Block (LESB) symbolic error count.
+ lesb/symb_err:
+ Link Error Status Block (LESB) symbolic error count.
- lesb/err_block: Link Error Status Block (LESB) block error count.
+ lesb/err_block:
+ Link Error Status Block (LESB) block error count.
- lesb/fcs_error: Link Error Status Block (LESB) Fibre Channel
+ lesb/fcs_error:
+ Link Error Status Block (LESB) Fibre Channel
Services error count.
Notes: ctlr_X (global increment starting at 0)
Fibre Channel frames into a FC fabric. It can also take
outbound FC frames and pack them in Ethernet packets to
be sent to their destination on the Ethernet segment.
+
Attributes:
- fabric_name: Identifies the fabric that the FCF services.
+ fabric_name:
+ Identifies the fabric that the FCF services.
- switch_name: Identifies the FCF.
+ switch_name:
+ Identifies the FCF.
- priority: The switch's priority amongst other FCFs on the same
+ priority:
+ The switch's priority amongst other FCFs on the same
fabric.
- selected: 1 indicates that the switch has been selected for use;
+ selected:
+ 1 indicates that the switch has been selected for use;
0 indicates that the switch will not be used.
- fc_map: The Fibre Channel MAP
+ fc_map:
+ The Fibre Channel MAP
- vfid: The Virtual Fabric ID
+ vfid:
+ The Virtual Fabric ID
- mac: The FCF's MAC address
+ mac:
+ The FCF's MAC address
- fka_period: The FIP Keep-Alive period
+ fka_period:
+ The FIP Keep-Alive period
fabric_state: The internal kernel state
- "Unknown" - Initialization value
- "Disconnected" - No link to the FCF/fabric
- "Connected" - Host is connected to the FCF
- "Deleted" - FCF is being removed from the system
+
+ - "Unknown" - Initialization value
+ - "Disconnected" - No link to the FCF/fabric
+ - "Connected" - Host is connected to the FCF
+ - "Deleted" - FCF is being removed from the system
dev_loss_tmo: The device loss timeout period for this FCF.
the driver to attempt to bind to the device found at
this location. The format for the location is Object.Id
and is the same as found in /sys/bus/fsl-mc/devices/.
- For example:
- # echo dpni.2 > /sys/bus/fsl-mc/drivers/fsl_dpaa2_eth/bind
+
+ For example::
+
+ # echo dpni.2 > /sys/bus/fsl-mc/drivers/fsl_dpaa2_eth/bind
What: /sys/bus/fsl-mc/drivers/.../unbind
Date: December 2016
driver to attempt to unbind from the device found at
this location. The format for the location is Object.Id
and is the same as found in /sys/bus/fsl-mc/devices/.
- For example:
- # echo dpni.2 > /sys/bus/fsl-mc/drivers/fsl_dpaa2_eth/unbind
+
+ For example::
+
+ # echo dpni.2 > /sys/bus/fsl-mc/drivers/fsl_dpaa2_eth/unbind
Contact: Minkyu Kang <mk7.kang@samsung.com>
Description:
show what device is attached
- NONE - no device
- USB - USB device is attached
- UART - UART is attached
- CHARGER - Charger is attaced
- JIG - JIG is attached
+
+ ======= ======================
+ NONE no device
+ USB USB device is attached
+ UART UART is attached
+ CHARGER Charger is attaced
+ JIG JIG is attached
+ ======= ======================
What: /sys/bus/i2c/devices/.../switch
Date: February 2011
Contact: Minkyu Kang <mk7.kang@samsung.com>
Description:
show or set the state of manual switch
- VAUDIO - switch to VAUDIO path
- UART - switch to UART path
- AUDIO - switch to AUDIO path
- DHOST - switch to DHOST path
- AUTO - switch automatically by device
+
+ ======= ==============================
+ VAUDIO switch to VAUDIO path
+ UART switch to UART path
+ AUDIO switch to AUDIO path
+ DHOST switch to DHOST path
+ AUTO switch automatically by device
+ ======= ==============================
Value that exists only for mux devices that can be
written to control the behaviour of the multiplexer on
idle. Possible values:
- -2 - disconnect on idle, i.e. deselect the last used
- channel, which is useful when there is a device
- with an address that conflicts with another
- device on another mux on the same parent bus.
- -1 - leave the mux as-is, which is the most optimal
- setting in terms of I2C operations and is the
- default mode.
- 0..<nchans> - set the mux to a predetermined channel,
- which is useful if there is one channel that is
- used almost always, and you want to reduce the
- latency for normal operations after rare
- transactions on other channels
+
+ =========== ===============================================
+ -2 disconnect on idle, i.e. deselect the last used
+ channel, which is useful when there is a device
+ with an address that conflicts with another
+ device on another mux on the same parent bus.
+ -1 leave the mux as-is, which is the most optimal
+ setting in terms of I2C operations and is the
+ default mode.
+ 0..<nchans> set the mux to a predetermined channel,
+ which is useful if there is one channel that is
+ used almost always, and you want to reduce the
+ latency for normal operations after rare
+ transactions on other channels
+ =========== ===============================================
by space. Modes can be "hdr-ddr", "hdr-tsp" and "hdr-tsl".
See the I3C specification for more details about these HDR
modes.
+
This entry describes the HDRCAP of the master controller
driving the bus.
Expose the HDR (High Data Rate) capabilities of a device.
Returns a list of supported HDR mode, each element is separated
by space. Modes can be "hdr-ddr", "hdr-tsp" and "hdr-tsl".
+
See the I3C specification for more details about these HDR
modes.
based on hardware generated events (e.g. data ready) or
provided by a separate driver for other hardware (e.g.
periodic timer, GPIO or high resolution timer).
+
Contains trigger type specific elements. These do not
generalize well and hence are not documented in this file.
X is the IIO index of the trigger.
Description:
When the internal sampling clock can only take a specific set of
frequencies, we can specify the available values with:
+
- a small discrete set of values like "0 2 4 6 8"
- a range with minimum, step and maximum frequencies like
"[min step max]"
<type>[Y][_name]_<raw|input>_thresh_falling_value may take
different values, but the device can only enable both thresholds
or neither.
+
Note the driver will assume the last p events requested are
to be enabled where p is how many it supports (which may vary
depending on the exact set requested. So if you want to be
<type>[Y][_name]_<raw|input>_roc_falling_value may take
different values, but the device can only enable both rate of
change thresholds or neither.
+
Note the driver will assume the last p events requested are
to be enabled where p is however many it supports (which may
vary depending on the exact set requested. So if you want to be
Specifies the value of threshold that the device is comparing
against for the events enabled by
<type>Y[_name]_thresh[_rising|falling]_en.
+
If separate attributes exist for the two directions, but
direction is not specified for this attribute, then a single
threshold value applies to both directions.
+
The raw or input element of the name indicates whether the
value is in raw device units or in processed units (as _raw
and _input do on sysfs direct channel read attributes).
If separate attributes exist for the two directions, but
direction is not specified for this attribute, then a single
hysteresis value applies to both directions.
+
For falling events the hysteresis is added to the _value attribute for
this event to get the upper threshold for when the event goes back to
normal, for rising events the hysteresis is subtracted from the _value
Specifies the value of rate of change threshold that the
device is comparing against for the events enabled by
<type>[Y][_name]_roc[_rising|falling]_en.
+
If separate attributes exist for the two directions,
but direction is not specified for this attribute,
then a single threshold value applies to both directions.
Proximity measurement indicating that some
object is near the sensor, usually by observing
reflectivity of infrared or ultrasound emitted.
+
Often these sensors are unit less and as such conversion
to SI units is not possible. Higher proximity measurements
indicate closer objects, and vice versa. Units after
Description:
A single positive integer specifying the maximum number of scan
elements to wait for.
+
Poll will block until the watermark is reached.
+
Blocking read will wait until the minimum between the requested
read amount or the low water mark is available.
+
Non-blocking read will retrieve the available samples from the
buffer even if there are less samples then watermark level. This
allows the application to block on poll with a timeout and read
device settings allows it (e.g. if a trigger is set that samples
data differently that the hardware fifo does then hardware fifo
will not enabled).
+
If the hardware fifo is enabled and the level of the hardware
fifo reaches the hardware fifo watermark level the device will
flush its hardware fifo to the device buffer. Doing a non
blocking read on the device when no samples are present in the
device buffer will also force a flush.
+
When the hardware fifo is enabled there is no need to use a
trigger to use buffer mode since the watermark settings
guarantees that the hardware fifo is flushed to the device
A single positive integer specifying the minimum watermark level
for the hardware fifo of this device. If the device does not
have a hardware fifo this entry is not present.
+
If the user sets buffer/watermark to a value less than this one,
then the hardware watermark will remain unset.
A single positive integer specifying the maximum watermark level
for the hardware fifo of this device. If the device does not
have a hardware fifo this entry is not present.
+
If the user sets buffer/watermark to a value greater than this
one, then the hardware watermark will be capped at this value.
levels for the hardware fifo. This entry is optional and if it
is not present it means that all the values between
hwfifo_watermark_min and hwfifo_watermark_max are supported.
+
If the user sets buffer/watermark to a value greater than
hwfifo_watermak_min but not equal to any of the values in this
list, the driver will chose an appropriate value for the
Contact: linux-iio@vger.kernel.org
Description:
'1' (enable) or '0' (disable) specifying the enable
- of heater function. Same reading values apply
+ of heater function. Same reading values apply.
+
This ABI is especially applicable for humidity sensors
to heatup the device and get rid of any condensation
in some humidity environment
Mounting matrix for IIO sensors. This is a rotation matrix which
informs userspace about sensor chip's placement relative to the
main hardware it is mounted on.
+
Main hardware placement is defined according to the local
reference frame related to the physical quantity the sensor
measures.
+
Given that the rotation matrix is defined in a board specific
way (platform data and / or device-tree), the main hardware
reference frame definition is left to the implementor's choice
(see below for a magnetometer example).
+
Applications should apply this rotation matrix to samples so
that when main hardware reference frame is aligned onto local
reference frame, then sensor chip reference frame is also
perfectly aligned with it.
+
Matrix is a 3x3 unitary matrix and typically looks like
[0, 1, 0; 1, 0, 0; 0, 0, -1]. Identity matrix
[1, 0, 0; 0, 1, 0; 0, 0, 1] means sensor chip and main hardware
For example, a mounting matrix for a magnetometer sensor informs
userspace about sensor chip's ORIENTATION relative to the main
hardware.
+
More specifically, main hardware orientation is defined with
respect to the LOCAL EARTH GEOMAGNETIC REFERENCE FRAME where :
+
* Y is in the ground plane and positive towards magnetic North ;
* X is in the ground plane, perpendicular to the North axis and
positive towards the East ;
An implementor might consider that for a hand-held device, a
'natural' orientation would be 'front facing camera at the top'.
The main hardware reference frame could then be described as :
+
* Y is in the plane of the screen and is positive towards the
top of the screen ;
* X is in the plane of the screen, perpendicular to Y axis, and
positive towards the right hand side of the screen ;
* Z is perpendicular to the screen plane and positive out of the
screen.
+
Another example for a quadrotor UAV might be :
+
* Y is in the plane of the propellers and positive towards the
front-view camera;
* X is in the plane of the propellers, perpendicular to Y axis,
This interface is deprecated; please use the Counter subsystem.
A list of possible counting directions which are:
+
- "up" : counter device is increasing.
- "down": counter device is decreasing.
Description:
The DAC is used to find the peak level of an alternating
voltage input signal by a binary search using the output
- of a comparator wired to an interrupt pin. Like so:
+ of a comparator wired to an interrupt pin. Like so::
+
_
| \
input +------>-------|+ \
| irq|------<-------'
| |
'-------'
+
The boolean invert attribute (0/1) should be set when the
input signal is centered around the maximum value of the
dac instead of zero. The envelope detector will search
from below in this case and will also invert the result.
+
The edge/level of the interrupt is also switched to its
opposite value.
is separately set for "GND-Open" and "Supply-Open" modes.
Channels 0..31 have common low threshold values, but could have different
sensing_modes.
+
The low voltage threshold range is between 2..21V.
Hysteresis between low and high thresholds can not be lower then 2 and
can not be odd.
+
If falling threshold results hysteresis to odd value then rising
threshold is automatically subtracted by one.
this value then the threshold rising event is pushed.
Depending on in_voltageY_sensing_mode the high voltage threshold
is separately set for "GND-Open" and "Supply-Open" modes.
+
Channels 0..31 have common high threshold values, but could have different
sensing_modes.
+
The high voltage threshold range is between 3..22V.
Hysteresis between low and high thresholds can not be lower then 2 and
can not be odd.
+
If rising threshold results hysteresis to odd value then falling
threshold is automatically appended by one.
The STM32 ADC can be configured to use external trigger sources
(e.g. timers, pwm or exti gpio). Then, it can be tuned to start
conversions on external trigger by either:
+
- "rising-edge"
- "falling-edge"
- "both-edges".
+
Reading returns current trigger polarity.
+
Writing value before enabling conversions sets trigger polarity.
What: /sys/bus/iio/devices/triggerX/trigger_polarity_available
Contact: linux-iio@vger.kernel.org
Description:
Writing '1' will perform a FOC (Fast Online Calibration). The
- corresponding calibration offsets can be read from *_calibbias
+ corresponding calibration offsets can be read from `*_calibbias`
entries.
What: /sys/bus/iio/devices/iio:deviceX/location
Contact: arnaud.pouliquen@st.com
Description:
For audio purpose only.
+
Used by audio driver to set/get the spi input frequency.
+
This is mandatory if DFSDM is slave on SPI bus, to
provide information on the SPI clock frequency during runtime
Notice that the SPI frequency should be a multiple of sample
frequency to ensure the precision.
- if DFSDM input is SPI master
+
+ if DFSDM input is SPI master:
+
Reading SPI clkout frequency,
error on writing
+
If DFSDM input is SPI Slave:
+
Reading returns value previously set.
Writing value before starting conversions.
first object echoed in meters. Default value is 6.020.
This setting limits the time the driver is waiting for a
echo.
+
Showing the range of available values is represented as the
minimum value, the step and the maximum value, all enclosed
in square brackets.
- Example:
- [0.043 0.043 11.008]
+
+ Example::
+
+ [0.043 0.043 11.008]
Contact: linux-iio@vger.kernel.org
Description:
Reading returns either '1' or '0'.
+
'1' means that the clock in question is present.
+
'0' means that the clock is missing.
What: /sys/bus/iio/devices/iio:deviceX/pllY_locked
KernelVersion:
Contact: linux-iio@vger.kernel.org
Description:
- Reading returns the datasheet name for channel Y:
+ Reading returns the datasheet name for channel Y::
- out_altvoltage0_name: RF8x
- out_altvoltage1_name: RFAUX8x
- out_altvoltage2_name: RF16x
- out_altvoltage3_name: RF32x
+ out_altvoltage0_name: RF8x
+ out_altvoltage1_name: RFAUX8x
+ out_altvoltage2_name: RF16x
+ out_altvoltage3_name: RF32x
What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_powerdown
KernelVersion:
Get measured values from the ADC for these stages. Y is the
specific stage number corresponding to datasheet stage names
as follows:
- 1 -> LED2
- 2 -> ALED2/LED3
- 3 -> LED1
- 4 -> ALED1/LED4
+
+ == ==========
+ 1 LED2
+ 2 ALED2/LED3
+ 3 LED1
+ 4 ALED1/LED4
+ == ==========
+
Note that channels 5 and 6 represent LED2-ALED2 and LED1-ALED1
respectively which simply helper channels containing the
calculated difference in the value of stage 1 - 2 and 3 - 4.
Scheme 0 has wider dynamic range, Scheme 1 proximity detection
is less affected by the ambient IR noise variation.
- 0 Sensing IR from LED and ambient
- 1 Sensing IR from LED with ambient IR rejection
+ == =============================================
+ 0 Sensing IR from LED and ambient
+ 1 Sensing IR from LED with ambient IR rejection
+ == =============================================
Contact: fabrice.gasnier@st.com
Description:
Configure the device counter quadrature modes:
+
- non-quadrature:
Encoder IN1 input servers as the count input (up
direction).
+
- quadrature:
Encoder IN1 and IN2 inputs are mixed to get direction
and count.
Contact: fabrice.gasnier@st.com
Description:
Configure the device encoder/counter active edge:
+
- rising-edge
- falling-edge
- both-edges
In non-quadrature mode, device counts up on active edge.
+
In quadrature mode, encoder counting scenarios are as follows:
- ----------------------------------------------------------------
+
+ +---------+----------+--------------------+--------------------+
| Active | Level on | IN1 signal | IN2 signal |
- | edge | opposite |------------------------------------------
+ | edge | opposite +----------+---------+----------+---------+
| | signal | Rising | Falling | Rising | Falling |
- ----------------------------------------------------------------
- | Rising | High -> | Down | - | Up | - |
- | edge | Low -> | Up | - | Down | - |
- ----------------------------------------------------------------
- | Falling | High -> | - | Up | - | Down |
- | edge | Low -> | - | Down | - | Up |
- ----------------------------------------------------------------
- | Both | High -> | Down | Up | Up | Down |
- | edges | Low -> | Up | Down | Down | Up |
- ----------------------------------------------------------------
+ +---------+----------+----------+---------+----------+---------+
+ | Rising | High -> | Down | - | Up | - |
+ | edge | Low -> | Up | - | Down | - |
+ +---------+----------+----------+---------+----------+---------+
+ | Falling | High -> | - | Up | - | Down |
+ | edge | Low -> | - | Down | - | Up |
+ +---------+----------+----------+---------+----------+---------+
+ | Both | High -> | Down | Up | Up | Down |
+ | edges | Low -> | Up | Down | Down | Up |
+ +---------+----------+----------+---------+----------+---------+
Description:
Current configuration and available configurations
for the bias current.
- normal - Normal measurement configurations (default)
- positivebias - Positive bias configuration
- negativebias - Negative bias configuration
- disabled - Only available on HMC5983. Disables magnetic
+
+ ============ ============================================
+ normal Normal measurement configurations (default)
+ positivebias Positive bias configuration
+ negativebias Negative bias configuration
+ disabled Only available on HMC5983. Disables magnetic
sensor and enables temperature sensor.
- Note: The effect of this configuration may vary
- according to the device. For exact documentation
- check the device's datasheet.
+ ============ ============================================
+
+ Note:
+ The effect of this configuration may vary
+ according to the device. For exact documentation
+ check the device's datasheet.
Open-circuit fault. The detection of open-circuit faults,
such as those caused by broken thermocouple wires.
Reading returns either '1' or '0'.
- '1' = An open circuit such as broken thermocouple wires
- has been detected.
- '0' = No open circuit or broken thermocouple wires are detected
+
+ === =======================================================
+ '1' An open circuit such as broken thermocouple wires
+ has been detected.
+ '0' No open circuit or broken thermocouple wires are detected
+ === =======================================================
What: /sys/bus/iio/devices/iio:deviceX/fault_ovuv
KernelVersion: 5.1
cables by integrated MOSFETs at the T+ and T- inputs, and the
BIAS output. These MOSFETs turn off when the input voltage is
negative or greater than VDD.
+
Reading returns either '1' or '0'.
- '1' = The input voltage is negative or greater than VDD.
- '0' = The input voltage is positive and less than VDD (normal
- state).
+
+ === =======================================================
+ '1' The input voltage is negative or greater than VDD.
+ '0' The input voltage is positive and less than VDD (normal
+ state).
+ === =======================================================
Contact: benjamin.gaignard@st.com
Description:
Reading returns the list possible master modes which are:
- - "reset" : The UG bit from the TIMx_EGR register is
+
+
+ - "reset"
+ The UG bit from the TIMx_EGR register is
used as trigger output (TRGO).
- - "enable" : The Counter Enable signal CNT_EN is used
+ - "enable"
+ The Counter Enable signal CNT_EN is used
as trigger output.
- - "update" : The update event is selected as trigger output.
+ - "update"
+ The update event is selected as trigger output.
For instance a master timer can then be used
as a prescaler for a slave timer.
- - "compare_pulse" : The trigger output send a positive pulse
- when the CC1IF flag is to be set.
- - "OC1REF" : OC1REF signal is used as trigger output.
- - "OC2REF" : OC2REF signal is used as trigger output.
- - "OC3REF" : OC3REF signal is used as trigger output.
- - "OC4REF" : OC4REF signal is used as trigger output.
+ - "compare_pulse"
+ The trigger output send a positive pulse
+ when the CC1IF flag is to be set.
+ - "OC1REF"
+ OC1REF signal is used as trigger output.
+ - "OC2REF"
+ OC2REF signal is used as trigger output.
+ - "OC3REF"
+ OC3REF signal is used as trigger output.
+ - "OC4REF"
+ OC4REF signal is used as trigger output.
+
Additional modes (on TRGO2 only):
- - "OC5REF" : OC5REF signal is used as trigger output.
- - "OC6REF" : OC6REF signal is used as trigger output.
+
+ - "OC5REF"
+ OC5REF signal is used as trigger output.
+ - "OC6REF"
+ OC6REF signal is used as trigger output.
- "compare_pulse_OC4REF":
- OC4REF rising or falling edges generate pulses.
+ OC4REF rising or falling edges generate pulses.
- "compare_pulse_OC6REF":
- OC6REF rising or falling edges generate pulses.
+ OC6REF rising or falling edges generate pulses.
- "compare_pulse_OC4REF_r_or_OC6REF_r":
- OC4REF or OC6REF rising edges generate pulses.
+ OC4REF or OC6REF rising edges generate pulses.
- "compare_pulse_OC4REF_r_or_OC6REF_f":
- OC4REF rising or OC6REF falling edges generate pulses.
+ OC4REF rising or OC6REF falling edges generate
+ pulses.
- "compare_pulse_OC5REF_r_or_OC6REF_r":
- OC5REF or OC6REF rising edges generate pulses.
+ OC5REF or OC6REF rising edges generate pulses.
- "compare_pulse_OC5REF_r_or_OC6REF_f":
- OC5REF rising or OC6REF falling edges generate pulses.
-
- +-----------+ +-------------+ +---------+
- | Prescaler +-> | Counter | +-> | Master | TRGO(2)
- +-----------+ +--+--------+-+ |-> | Control +-->
- | | || +---------+
- +--v--------+-+ OCxREF || +---------+
- | Chx compare +----------> | Output | ChX
- +-----------+-+ | | Control +-->
- . | | +---------+
- . | | .
- +-----------v-+ OC6REF | .
- | Ch6 compare +---------+>
- +-------------+
-
- Example with: "compare_pulse_OC4REF_r_or_OC6REF_r":
-
- X
- X X
- X . . X
- X . . X
- X . . X
- count X . . . . X
- . . . .
- . . . .
- +---------------+
- OC4REF | . . |
- +-+ . . +-+
- . +---+ .
- OC6REF . | | .
- +-------+ +-------+
- +-+ +-+
- TRGO2 | | | |
- +-+ +---+ +---------+
+ OC5REF rising or OC6REF falling edges generate
+ pulses.
+
+ ::
+
+ +-----------+ +-------------+ +---------+
+ | Prescaler +-> | Counter | +-> | Master | TRGO(2)
+ +-----------+ +--+--------+-+ |-> | Control +-->
+ | | || +---------+
+ +--v--------+-+ OCxREF || +---------+
+ | Chx compare +----------> | Output | ChX
+ +-----------+-+ | | Control +-->
+ . | | +---------+
+ . | | .
+ +-----------v-+ OC6REF | .
+ | Ch6 compare +---------+>
+ +-------------+
+
+ Example with: "compare_pulse_OC4REF_r_or_OC6REF_r"::
+
+ X
+ X X
+ X . . X
+ X . . X
+ X . . X
+ count X . . . . X
+ . . . .
+ . . . .
+ +---------------+
+ OC4REF | . . |
+ +-+ . . +-+
+ . +---+ .
+ OC6REF . | | .
+ +-------+ +-------+
+ +-+ +-+
+ TRGO2 | | | |
+ +-+ +---+ +---------+
What: /sys/bus/iio/devices/triggerX/master_mode
KernelVersion: 4.11
When counting down the counter start from preset value
and fire event when reach 0.
+What: /sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available
+KernelVersion: 4.12
+Contact: benjamin.gaignard@st.com
+Description:
+ Reading returns the list possible quadrature modes.
+
+What: /sys/bus/iio/devices/iio:deviceX/in_count0_quadrature_mode
+KernelVersion: 4.12
+Contact: benjamin.gaignard@st.com
+Description:
+ Configure the device counter quadrature modes:
+
+ channel_A:
+ Encoder A input servers as the count input and B as
+ the UP/DOWN direction control input.
+
+ channel_B:
+ Encoder B input serves as the count input and A as
+ the UP/DOWN direction control input.
+
+ quadrature:
+ Encoder A and B inputs are mixed to get direction
+ and count with a scale of 0.25.
+
What: /sys/bus/iio/devices/iio:deviceX/in_count_enable_mode_available
KernelVersion: 4.12
Contact: benjamin.gaignard@st.com
Configure the device counter enable modes, in all case
counting direction is set by in_count0_count_direction
attribute and the counter is clocked by the internal clock.
+
always:
Counter is always ON.
KernelVersion: 4.3
Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Description: (RO) Output port type:
- 0: not present,
- 1: MSU (Memory Storage Unit)
- 2: CTP (Common Trace Port)
- 4: PTI (MIPI PTI).
+
+ == =========================
+ 0 not present,
+ 1 MSU (Memory Storage Unit)
+ 2 CTP (Common Trace Port)
+ 4 PTI (MIPI PTI).
+ == =========================
What: /sys/bus/intel_th/devices/<intel_th_id>-gth/outputs/[0-7]_drop
Date: June 2015
KernelVersion: 4.3
Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Description: (RW) Configure MSC operating mode:
+
- "single", for contiguous buffer mode (high-order alloc);
- "multi", for multiblock mode;
- "ExI", for DCI handler mode;
- "debug", for debug mode;
- any of the currently loaded buffer sinks.
+
If operating mode changes, existing buffer is deallocated,
provided there are no active users and tracing is not enabled,
otherwise the write will fail.
KernelVersion: 4.3
Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Description: (RW) Configure MSC buffer size for "single" or "multi" modes.
+
In single mode, this is a single number of pages, has to be
power of 2. In multiblock mode, this is a comma-separated list
of numbers of pages for each window to be allocated. Number of
windows is not limited.
+
Writing to this file deallocates existing buffer (provided
there are no active users and tracing is not enabled) and then
allocates a new one.
Contact: Christian Gromm <christian.gromm@microchip.com>
Description:
This is to read back the configured direction of the channel.
- The following strings will be accepted:
+ The following strings will be accepted::
+
'tx',
'rx'
Users:
Contact: Christian Gromm <christian.gromm@microchip.com>
Description:
This is to read back the configured data type of the channel.
- The following strings will be accepted:
+ The following strings will be accepted::
+
'control',
'async',
'sync',
Date: March 2019
KernelVersion: 5.3
Contact: Marek Behún <marek.behun@nic.cz>
-Description: (R) Moxtet module description. Format: string
+Description: (Read) Moxtet module description. Format: string
What: /sys/bus/moxtet/devices/moxtet-<name>.<addr>/module_id
Date: March 2019
KernelVersion: 5.3
Contact: Marek Behún <marek.behun@nic.cz>
-Description: (R) Moxtet module ID. Format: %x
+Description: (Read) Moxtet module ID. Format: %x
What: /sys/bus/moxtet/devices/moxtet-<name>.<addr>/module_name
Date: March 2019
KernelVersion: 5.3
Contact: Marek Behún <marek.behun@nic.cz>
-Description: (R) Moxtet module name. Format: string
+Description: (Read) Moxtet module name. Format: string
-For all of the nmem device attributes under nfit/*, see the 'NVDIMM Firmware
+For all of the nmem device attributes under ``nfit/*``, see the 'NVDIMM Firmware
Interface Table (NFIT)' section in the ACPI specification
(http://www.uefi.org/specifications) for more details.
+What: nvdimm
+Date: July 2020
+KernelVersion: 5.8
+Contact: Dan Williams <dan.j.williams@intel.com>
+Description:
+
The libnvdimm sub-system implements a common sysfs interface for
platform nvdimm resources. See Documentation/driver-api/nvdimm/.
at 'Documentation/powerpc/papr_hcalls.rst' . Below are
the flags reported in this sysfs file:
- * "not_armed" : Indicates that NVDIMM contents will not
+ * "not_armed"
+ Indicates that NVDIMM contents will not
survive a power cycle.
- * "flush_fail" : Indicates that NVDIMM contents
+ * "flush_fail"
+ Indicates that NVDIMM contents
couldn't be flushed during last
shut-down event.
- * "restore_fail": Indicates that NVDIMM contents
+ * "restore_fail"
+ Indicates that NVDIMM contents
couldn't be restored during NVDIMM
initialization.
- * "encrypted" : NVDIMM contents are encrypted.
- * "smart_notify": There is health event for the NVDIMM.
- * "scrubbed" : Indicating that contents of the
+ * "encrypted"
+ NVDIMM contents are encrypted.
+ * "smart_notify"
+ There is health event for the NVDIMM.
+ * "scrubbed"
+ Indicating that contents of the
NVDIMM have been scrubbed.
- * "locked" : Indicating that NVDIMM contents cant
+ * "locked"
+ Indicating that NVDIMM contents cant
be modified until next power cycle.
What: /sys/bus/nd/devices/nmemX/papr/perf_stats
* "MedWDur " : Media Write Duration
* "CchRHCnt" : Cache Read Hit Count
* "CchWHCnt" : Cache Write Hit Count
- * "FastWCnt" : Fast Write Count
\ No newline at end of file
+ * "FastWCnt" : Fast Write Count
this location. This is useful for overriding default
bindings. The format for the location is: DDDD:BB:DD.F.
That is Domain:Bus:Device.Function and is the same as
- found in /sys/bus/pci/devices/. For example:
- # echo 0000:00:19.0 > /sys/bus/pci/drivers/foo/bind
+ found in /sys/bus/pci/devices/. For example::
+
+ # echo 0000:00:19.0 > /sys/bus/pci/drivers/foo/bind
+
(Note: kernels before 2.6.28 may require echo -n).
What: /sys/bus/pci/drivers/.../unbind
this location. This may be useful when overriding default
bindings. The format for the location is: DDDD:BB:DD.F.
That is Domain:Bus:Device.Function and is the same as
- found in /sys/bus/pci/devices/. For example:
- # echo 0000:00:19.0 > /sys/bus/pci/drivers/foo/unbind
+ found in /sys/bus/pci/devices/. For example::
+
+ # echo 0000:00:19.0 > /sys/bus/pci/drivers/foo/unbind
+
(Note: kernels before 2.6.28 may require echo -n).
What: /sys/bus/pci/drivers/.../new_id
Class, Class Mask, and Private Driver Data. The Vendor ID
and Device ID fields are required, the rest are optional.
Upon successfully adding an ID, the driver will probe
- for the device and attempt to bind to it. For example:
- # echo "8086 10f5" > /sys/bus/pci/drivers/foo/new_id
+ for the device and attempt to bind to it. For example::
+
+ # echo "8086 10f5" > /sys/bus/pci/drivers/foo/new_id
What: /sys/bus/pci/drivers/.../remove_id
Date: February 2009
required, the rest are optional. After successfully
removing an ID, the driver will no longer support the
device. This is useful to ensure auto probing won't
- match the driver to the device. For example:
- # echo "8086 10f5" > /sys/bus/pci/drivers/foo/remove_id
+ match the driver to the device. For example::
+
+ # echo "8086 10f5" > /sys/bus/pci/drivers/foo/remove_id
What: /sys/bus/pci/rescan
Date: January 2009
-==========================
PCIe Device AER statistics
-==========================
+--------------------------
+
These attributes show up under all the devices that are AER capable. These
statistical counters indicate the errors "as seen/reported by the device".
Note that this may mean that if an endpoint is causing problems, the AER
PCI device using ERR_COR. Note that since multiple errors may
be reported using a single ERR_COR message, thus
TOTAL_ERR_COR at the end of the file may not match the actual
- total of all the errors in the file. Sample output:
--------------------------------------------------------------------------
-localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_correctable
-Receiver Error 2
-Bad TLP 0
-Bad DLLP 0
-RELAY_NUM Rollover 0
-Replay Timer Timeout 0
-Advisory Non-Fatal 0
-Corrected Internal Error 0
-Header Log Overflow 0
-TOTAL_ERR_COR 2
--------------------------------------------------------------------------
+ total of all the errors in the file. Sample output::
+
+ localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_correctable
+ Receiver Error 2
+ Bad TLP 0
+ Bad DLLP 0
+ RELAY_NUM Rollover 0
+ Replay Timer Timeout 0
+ Advisory Non-Fatal 0
+ Corrected Internal Error 0
+ Header Log Overflow 0
+ TOTAL_ERR_COR 2
What: /sys/bus/pci/devices/<dev>/aer_dev_fatal
Date: July 2018
PCI device using ERR_FATAL. Note that since multiple errors may
be reported using a single ERR_FATAL message, thus
TOTAL_ERR_FATAL at the end of the file may not match the actual
- total of all the errors in the file. Sample output:
--------------------------------------------------------------------------
-localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_fatal
-Undefined 0
-Data Link Protocol 0
-Surprise Down Error 0
-Poisoned TLP 0
-Flow Control Protocol 0
-Completion Timeout 0
-Completer Abort 0
-Unexpected Completion 0
-Receiver Overflow 0
-Malformed TLP 0
-ECRC 0
-Unsupported Request 0
-ACS Violation 0
-Uncorrectable Internal Error 0
-MC Blocked TLP 0
-AtomicOp Egress Blocked 0
-TLP Prefix Blocked Error 0
-TOTAL_ERR_FATAL 0
--------------------------------------------------------------------------
+ total of all the errors in the file. Sample output::
+
+ localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_fatal
+ Undefined 0
+ Data Link Protocol 0
+ Surprise Down Error 0
+ Poisoned TLP 0
+ Flow Control Protocol 0
+ Completion Timeout 0
+ Completer Abort 0
+ Unexpected Completion 0
+ Receiver Overflow 0
+ Malformed TLP 0
+ ECRC 0
+ Unsupported Request 0
+ ACS Violation 0
+ Uncorrectable Internal Error 0
+ MC Blocked TLP 0
+ AtomicOp Egress Blocked 0
+ TLP Prefix Blocked Error 0
+ TOTAL_ERR_FATAL 0
What: /sys/bus/pci/devices/<dev>/aer_dev_nonfatal
Date: July 2018
PCI device using ERR_NONFATAL. Note that since multiple errors
may be reported using a single ERR_FATAL message, thus
TOTAL_ERR_NONFATAL at the end of the file may not match the
- actual total of all the errors in the file. Sample output:
--------------------------------------------------------------------------
-localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_nonfatal
-Undefined 0
-Data Link Protocol 0
-Surprise Down Error 0
-Poisoned TLP 0
-Flow Control Protocol 0
-Completion Timeout 0
-Completer Abort 0
-Unexpected Completion 0
-Receiver Overflow 0
-Malformed TLP 0
-ECRC 0
-Unsupported Request 0
-ACS Violation 0
-Uncorrectable Internal Error 0
-MC Blocked TLP 0
-AtomicOp Egress Blocked 0
-TLP Prefix Blocked Error 0
-TOTAL_ERR_NONFATAL 0
--------------------------------------------------------------------------
+ actual total of all the errors in the file. Sample output::
+
+ localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_nonfatal
+ Undefined 0
+ Data Link Protocol 0
+ Surprise Down Error 0
+ Poisoned TLP 0
+ Flow Control Protocol 0
+ Completion Timeout 0
+ Completer Abort 0
+ Unexpected Completion 0
+ Receiver Overflow 0
+ Malformed TLP 0
+ ECRC 0
+ Unsupported Request 0
+ ACS Violation 0
+ Uncorrectable Internal Error 0
+ MC Blocked TLP 0
+ AtomicOp Egress Blocked 0
+ TLP Prefix Blocked Error 0
+ TOTAL_ERR_NONFATAL 0
-============================
PCIe Rootport AER statistics
-============================
+----------------------------
+
These attributes show up under only the rootports (or root complex event
collectors) that are AER capable. These indicate the number of error messages as
"reported to" the rootport. Please note that the rootports also transmit
Description:
Version of AudioDSP firmware ASoC catpt driver is
communicating with.
+
Format: %d.%d.%d.%d, type:major:minor:build.
What: /sys/devices/pci0000:00/<dev>/fw_info
number returns the port to normal operation.
For example: To force the high-speed device attached to
- port 4 on bus 2 to run at full speed:
+ port 4 on bus 2 to run at full speed::
echo 4 >/sys/bus/usb/devices/usb2/../companion
- To return the port to high-speed operation:
+ To return the port to high-speed operation::
echo -4 >/sys/bus/usb/devices/usb2/../companion
an individual subdirectory with the following name format of
device_name "nn:d:iiii", where:
- nn - two-digit hexadecimal ID of RapidIO network where the
+ ==== ========================================================
+ nn two-digit hexadecimal ID of RapidIO network where the
device resides
- d - device type: 'e' - for endpoint or 's' - for switch
- iiii - four-digit device destID for endpoints, or switchID for
+ d device type: 'e' - for endpoint or 's' - for switch
+ iiii four-digit device destID for endpoints, or switchID for
switches
+ ==== ========================================================
For example, below is a list of device directories that
represents a typical RapidIO network with one switch, one host,
and two agent endpoints, as it is seen by the enumerating host
- (with destID = 1):
+ (with destID = 1)::
- /sys/bus/rapidio/devices/00:e:0000
- /sys/bus/rapidio/devices/00:e:0002
- /sys/bus/rapidio/devices/00:s:0001
+ /sys/bus/rapidio/devices/00:e:0000
+ /sys/bus/rapidio/devices/00:e:0002
+ /sys/bus/rapidio/devices/00:s:0001
- NOTE: An enumerating or discovering endpoint does not create a
- sysfs entry for itself, this is why an endpoint with destID=1 is
- not shown in the list.
+ NOTE:
+ An enumerating or discovering endpoint does not create a
+ sysfs entry for itself, this is why an endpoint with destID=1
+ is not shown in the list.
Attributes Common for All RapidIO Devices
-----------------------------------------
Usage: <mon ip addr> <options> <pool name> <rbd image name> [<snap name>]
+ Example::
+
$ echo "192.168.0.1 name=admin rbd foo" > /sys/bus/rbd/add
The snapshot name can be "-" or omitted to map the image
Usage: <dev-id> [force]
+ Example::
+
$ echo 2 > /sys/bus/rbd/remove
Optional "force" argument which when passed will wait for
KernelVersion: v2.6.37
Contact: Sage Weil <sage@newdream.net>
Description:
- size: (RO) The size (in bytes) of the mapped block
+
+ ============== ================================================
+ size (RO) The size (in bytes) of the mapped block
device.
- major: (RO) The block device major number.
+ major (RO) The block device major number.
- client_id: (RO) The ceph unique client id that was assigned
+ client_id (RO) The ceph unique client id that was assigned
for this specific session.
- pool: (RO) The name of the storage pool where this rbd
+ pool (RO) The name of the storage pool where this rbd
image resides. An rbd image name is unique
within its pool.
- name: (RO) The name of the rbd image.
+ name (RO) The name of the rbd image.
- refresh: (WO) Writing to this file will reread the image
+ refresh (WO) Writing to this file will reread the image
header data and set all relevant data structures
accordingly.
- current_snap: (RO) The current snapshot for which the device
+ current_snap (RO) The current snapshot for which the device
is mapped.
+ ============== ================================================
What: /sys/bus/rbd/devices/<dev-id>/pool_id
KernelVersion: v3.7
Contact: Sage Weil <sage@newdream.net>
Description:
- image_id: (RO) The unique id for the rbd image. (For rbd
+ ========= ===============================================
+ image_id (RO) The unique id for the rbd image. (For rbd
image format 1 this is empty.)
- features: (RO) A hexadecimal encoding of the feature bits
+ features (RO) A hexadecimal encoding of the feature bits
for this image.
+ ========= ===============================================
What: /sys/bus/rbd/devices/<dev-id>/parent
KernelVersion: v4.9
Contact: Sage Weil <sage@newdream.net>
Description:
- snap_id: (RO) The current snapshot's id.
+ ============ ================================================
+ snap_id (RO) The current snapshot's id.
- config_info: (RO) The string written into
+ config_info (RO) The string written into
/sys/bus/rbd/add{,_single_major}.
- cluster_fsid: (RO) The ceph cluster UUID.
+ cluster_fsid (RO) The ceph cluster UUID.
- client_addr: (RO) The ceph unique client
+ client_addr (RO) The ceph unique client
entity_addr_t (address + nonce). The format is
<address>:<port>/<nonce>: '1.2.3.4:1234/5678' or
'[1:2:3:4:5:6:7:8]:1234/5678'.
+ ============ ================================================
When the file contains a "1" the bus is operated and periodically
does a push-pull cycle to write and read data from the
connected devices.
+
When writing a "0" or "1" the bus moves to the described state.
What: /sys/bus/siox/devices/siox-X/device_add
to add a new device dynamically. <type> is the name that is used to match
to a driver (similar to the platform bus). <inbytes> and <outbytes> define
the length of the input and output shift register in bytes respectively.
+
<statustype> defines the 4 bit device type that is check to identify connection
problems.
+
The new device is added to the end of the existing chain.
What: /sys/bus/siox/devices/siox-X/device_remove
Description: This attribute holds current Thunderbolt security level
set by the system BIOS. Possible values are:
- none: All devices are automatically authorized
- user: Devices are only authorized based on writing
- appropriate value to the authorized attribute
- secure: Require devices that support secure connect at
- minimum. User needs to authorize each device.
- dponly: Automatically tunnel Display port (and USB). No
- PCIe tunnels are created.
- usbonly: Automatically tunnel USB controller of the
+ ======= ==================================================
+ none All devices are automatically authorized
+ user Devices are only authorized based on writing
+ appropriate value to the authorized attribute
+ secure Require devices that support secure connect at
+ minimum. User needs to authorize each device.
+ dponly Automatically tunnel Display port (and USB). No
+ PCIe tunnels are created.
+ usbonly Automatically tunnel USB controller of the
connected Thunderbolt dock (and Display Port). All
PCIe links downstream of the dock are removed.
+ ======= ==================================================
What: /sys/bus/thunderbolt/devices/.../authorized
Date: Sep 2017
yet authorized.
Possible values are supported:
- 1: The device will be authorized and connected
+
+ == ===========================================
+ 1 The device will be authorized and connected
+ == ===========================================
When key attribute contains 32 byte hex string the possible
values are:
- 1: The 32 byte hex string is added to the device NVM and
- the device is authorized.
- 2: Send a challenge based on the 32 byte hex string. If the
- challenge response from device is valid, the device is
- authorized. In case of failure errno will be ENOKEY if
- the device did not contain a key at all, and
- EKEYREJECTED if the challenge response did not match.
+
+ == ========================================================
+ 1 The 32 byte hex string is added to the device NVM and
+ the device is authorized.
+ 2 Send a challenge based on the 32 byte hex string. If the
+ challenge response from device is valid, the device is
+ authorized. In case of failure errno will be ENOKEY if
+ the device did not contain a key at all, and
+ EKEYREJECTED if the challenge response did not match.
+ == ========================================================
What: /sys/bus/thunderbolt/devices/.../boot
Date: Jun 2018
verification fails an error code is returned instead.
This file will accept writing values "1" or "2"
+
- Writing "1" will flush the image to the storage
- area and authenticate the image in one action.
+ area and authenticate the image in one action.
- Writing "2" will run some basic validation on the image
- and flush it to the storage area.
+ and flush it to the storage area.
When read holds status of the last authentication
operation if an error occurred during the process. This
question. Following directories are already reserved by
the Apple XDomain specification:
- network: IP/ethernet over Thunderbolt
- targetdm: Target disk mode protocol over Thunderbolt
- extdisp: External display mode protocol over Thunderbolt
+ ======== ===============================================
+ network IP/ethernet over Thunderbolt
+ targetdm Target disk mode protocol over Thunderbolt
+ extdisp External display mode protocol over Thunderbolt
+ ======== ===============================================
What: /sys/bus/thunderbolt/devices/<xdomain>.<service>/modalias
Date: Jan 2018
image when the device is disconnected from the host system.
This file will accept writing values "1" or "2"
+
- Writing "1" will flush the image to the storage
- area and prepare the device for authentication on disconnect.
+ area and prepare the device for authentication on disconnect.
- Writing "2" will run some basic validation on the image
- and flush it to the storage area.
+ and flush it to the storage area.
by writing INTERFACE to /sys/bus/usb/drivers_probe
This allows to avoid side-effects with drivers
that need multiple interfaces.
+
A deauthorized interface cannot be probed or claimed.
What: /sys/bus/usb/devices/usbX/interface_authorized_default
table at compile time. The format for the device ID is:
idVendor idProduct bInterfaceClass RefIdVendor RefIdProduct
The vendor ID and device ID fields are required, the
- rest is optional. The Ref* tuple can be used to tell the
+ rest is optional. The `Ref*` tuple can be used to tell the
driver to use the same driver_data for the new device as
it is used for the reference device.
Upon successfully adding an ID, the driver will probe
- for the device and attempt to bind to it. For example:
- # echo "8086 10f5" > /sys/bus/usb/drivers/foo/new_id
+ for the device and attempt to bind to it. For example::
+
+ # echo "8086 10f5" > /sys/bus/usb/drivers/foo/new_id
Here add a new device (0458:7045) using driver_data from
- an already supported device (0458:704c):
- # echo "0458 7045 0 0458 704c" > /sys/bus/usb/drivers/foo/new_id
+ an already supported device (0458:704c)::
+
+ # echo "0458 7045 0 0458 704c" > /sys/bus/usb/drivers/foo/new_id
Reading from this file will list all dynamically added
device IDs in the same format, with one entry per
- line. For example:
- # cat /sys/bus/usb/drivers/foo/new_id
- 8086 10f5
- dead beef 06
- f00d cafe
+ line. For example::
+
+ # cat /sys/bus/usb/drivers/foo/new_id
+ 8086 10f5
+ dead beef 06
+ f00d cafe
The list will be truncated at PAGE_SIZE bytes due to
sysfs restrictions.
advance, and behaves well according to the specification.
This attribute is a bit-field that controls the behavior of
a specific port:
+
- Bit 0 of this field selects the "old" enumeration scheme,
as it is considerably faster (it only causes one USB reset
instead of 2).
+
The old enumeration scheme can also be selected globally
using /sys/module/usbcore/parameters/old_scheme_first, but
it is often not desirable as the new scheme was introduced to
poll() for monitoring changes to this value in user space.
Any time this value changes the corresponding hub device will send a
- udev event with the following attributes:
+ udev event with the following attributes::
- OVER_CURRENT_PORT=/sys/bus/usb/devices/.../(hub interface)/portX
- OVER_CURRENT_COUNT=[current value of this sysfs attribute]
+ OVER_CURRENT_PORT=/sys/bus/usb/devices/.../(hub interface)/portX
+ OVER_CURRENT_COUNT=[current value of this sysfs attribute]
What: /sys/bus/usb/devices/.../(hub interface)/portX/usb3_lpm_permit
Date: November 2015
Contact: Harrison Metzger <harrisonmetz@gmail.com>
Description: Controls the devices display mode.
For a 6 character display the values are
+
MSB 0x06; LSB 0x3F, and
+
for an 8 character display the values are
+
MSB 0x08; LSB 0xFF.
What: /sys/bus/usb/.../textmode
Contact: Harrison Metzger <harrisonmetz@gmail.com>
Description: Controls the decimal places on the device.
To set the nth decimal place, give this field
- the value of 10 ** n. Assume this field has
+ the value of ``10 ** n``. Assume this field has
the value k and has 1 or more decimal places set,
to set the mth place (where m is not already set),
- change this fields value to k + 10 ** m.
+ change this fields value to ``k + 10 ** m``.
Writing UUID to this file will create mediated device of
type <type-id> for parent device <device>. This is a
write-only file.
- For example:
- # echo "83b8f4f2-509f-382f-3c1e-e6bfe0fa1001" > \
+ For example::
+
+ # echo "83b8f4f2-509f-382f-3c1e-e6bfe0fa1001" > \
/sys/devices/foo/mdev_supported_types/foo-1/create
What: /sys/.../mdev_supported_types/<type-id>/devices/
Writing '1' to this file destroys the mediated device. The
vendor driver can fail the remove() callback if that device
is active and the vendor driver doesn't support hot unplug.
- Example:
- # echo 1 > /sys/bus/mdev/devices/<UUID>/remove
+ Example::
+
+ # echo 1 > /sys/bus/mdev/devices/<UUID>/remove
the "erase" command on the on-board flash of the connected
micro.
-What: /sys/class/c2port/c2portX/flash_erase
-Date: October 2008
-Contact: Rodolfo Giometti <giometti@linux.it>
-Description:
- The /sys/class/c2port/c2portX/flash_erase file show the
- on-board flash size of the connected micro.
-
What: /sys/class/c2port/c2portX/reset
Date: October 2008
Contact: Rodolfo Giometti <giometti@linux.it>
non-linear
The brightness changes non-linearly with each step. Brightness
controls should use a linear mapping for a linear perception.
+
+What: /sys/class/backlight/<backlight>/ambient_light_level
+Date: Apr, 2010
+KernelVersion: v2.6.35
+Contact: Michael Hennerich <michael.hennerich@analog.com>
+Description:
+ (RO) Get conversion value of the light sensor.
+
+ The value is automatically updated every 80 ms when the
+ light sensor is enabled.
+
+ The value range is device-driver specific:
+
+ For ADP8870:
+
+ It returns integer between 0 (dark) and 8000 (max ambient
+ brightness).
+
+ For ADP8860:
+
+ It returns a 13-bits integer.
+
+What: /sys/class/backlight/<backlight>/ambient_light_zone
+Date: Apr, 2010
+KernelVersion: v2.6.35
+Contact: Michael Hennerich <michael.hennerich@analog.com>,
+ device-drivers-devel@blackfin.uclinux.org
+
+Description:
+ (RW) Read or write the specific brightness level at which the
+ backlight operates.
+
+ The value meaning is device-driver specific:
+
+ For ADP8860:
+
+ == ==========================
+ 0 Off: Backlight set to 0 mA
+ 1 Level 1: daylight
+ 2 Level 2: bright
+ 3 Level 3: dark
+ == ==========================
+
+ For ADP8870:
+
+ == ==========================
+ 0 Off: Backlight set to 0 mA
+ 1 Level 1: daylight
+ 2 Level 2: bright
+ 3 Level 3: office
+ 4 Level 4: indoor
+ 5 Level 5: dark
+ == ==========================
+
+ Writing 0 returns to normal/automatic ambient light level
+ operation.
+
+ It can be enabled by writing the value stored in
+ /sys/class/backlight/<backlight>/max_brightness to
+ /sys/class/backlight/<backlight>/brightness.
dark (level 3). By default the brightness operates at the daylight brightness
level.
-What: /sys/class/backlight/<backlight>/ambient_light_level
-Date: Apr, 2010
-KernelVersion: v2.6.35
-Contact: Michael Hennerich <michael.hennerich@analog.com>
-Description:
- (RO) 13-bit conversion value for the first light sensor—high
- byte (Bit 12 to Bit 8). The value is updated every 80 ms (when
- the light sensor is enabled).
-
-
-What: /sys/class/backlight/<backlight>/ambient_light_zone
-Date: Apr, 2010
-KernelVersion: v2.6.35
-Contact: Michael Hennerich <michael.hennerich@analog.com>
-Description:
- (RW) Read or write the specific level at which the backlight
- operates. Value "0" enables automatic ambient light sensing, and
- values "1", "2" or "3" set the control to daylight, office or
- dark respectively.
+See also /sys/class/backlight/<backlight>/ambient_light_level and
+/sys/class/backlight/<backlight>/ambient_light_zone.
What: /sys/class/backlight/<backlight>/l1_daylight_max
+See also /sys/class/backlight/<backlight>/ambient_light_level and
+/sys/class/backlight/<backlight>/ambient_light_zone.
+
What: /sys/class/backlight/<backlight>/<ambient light zone>_max
What: /sys/class/backlight/<backlight>/l1_daylight_max
What: /sys/class/backlight/<backlight>/l2_bright_max
set to 0. Full off when the backlight is disabled.
This file will also show the dim brightness level stored for
this <ambient light zone>.
-
-What: /sys/class/backlight/<backlight>/ambient_light_level
-Date: May 2011
-KernelVersion: 3.0
-Contact: device-drivers-devel@blackfin.uclinux.org
-Description:
- Get conversion value of the light sensor.
- This value is updated every 80 ms (when the light sensor
- is enabled). Returns integer between 0 (dark) and
- 8000 (max ambient brightness)
-
-What: /sys/class/backlight/<backlight>/ambient_light_zone
-Date: May 2011
-KernelVersion: 3.0
-Contact: device-drivers-devel@blackfin.uclinux.org
-Description:
- Get/Set current ambient light zone. Reading returns
- integer between 1..5 (1 = daylight, 2 = bright, ..., 5 = dark).
- Writing a value between 1..5 forces the backlight controller
- to enter the corresponding ambient light zone.
- Writing 0 returns to normal/automatic ambient light level
- operation. The ambient light sensing feature on these devices
- is an extension to the API documented in
- Documentation/ABI/stable/sysfs-class-backlight.
- It can be enabled by writing the value stored in
- /sys/class/backlight/<backlight>/max_brightness to
- /sys/class/backlight/<backlight>/brightness.
Get the ALS output channel used as input in
ALS-current-control mode (0, 1), where:
- 0 - out_current0 (backlight 0)
- 1 - out_current1 (backlight 1)
+ == ==========================
+ 0 out_current0 (backlight 0)
+ 1 out_current1 (backlight 1)
+ == ==========================
What: /sys/class/backlight/<backlight>/als_en
Date: May 2012
Description:
Set the brightness-mapping mode (0, 1), where:
- 0 - exponential mode
- 1 - linear mode
+ == ================
+ 0 exponential mode
+ 1 linear mode
+ == ================
What: /sys/class/backlight/<backlight>/pwm
Date: April 2012
Description:
Set the PWM-input control mask (5 bits), where:
- bit 5 - PWM-input enabled in Zone 4
- bit 4 - PWM-input enabled in Zone 3
- bit 3 - PWM-input enabled in Zone 2
- bit 2 - PWM-input enabled in Zone 1
- bit 1 - PWM-input enabled in Zone 0
- bit 0 - PWM-input enabled
+ ===== ===========================
+ bit 5 PWM-input enabled in Zone 4
+ bit 4 PWM-input enabled in Zone 3
+ bit 3 PWM-input enabled in Zone 2
+ bit 2 PWM-input enabled in Zone 1
+ bit 1 PWM-input enabled in Zone 0
+ bit 0 PWM-input enabled
+ ===== ===========================
filesystems which do not provide their own BDI.
Files under /sys/class/bdi/<bdi>/
----------------------------------
read_ahead_kb (read-write)
KernelVersion: 4.2
Description:
Tell the EC to reboot in various ways. Options are:
- "cancel": Cancel a pending reboot.
- "ro": Jump to RO without rebooting.
- "rw": Jump to RW without rebooting.
- "cold": Cold reboot.
- "disable-jump": Disable jump until next reboot.
- "hibernate": Hibernate the EC.
- "at-shutdown": Reboot after an AP shutdown.
+
+ - "cancel": Cancel a pending reboot.
+ - "ro": Jump to RO without rebooting.
+ - "rw": Jump to RW without rebooting.
+ - "cold": Cold reboot.
+ - "disable-jump": Disable jump until next reboot.
+ - "hibernate": Hibernate the EC.
+ - "at-shutdown": Reboot after an AP shutdown.
What: /sys/class/chromeos/<ec-device-name>/version
Date: August 2015
when performing the START_WORK ioctl. Only applicable when
running under hashed page table mmu.
Possible values:
- none: No prefaulting (default)
- work_element_descriptor: Treat the work element
- descriptor as an effective address and
- prefault what it points to.
- all: all segments process calling START_WORK maps.
+
+ ======================= ======================================
+ none No prefaulting (default)
+ work_element_descriptor Treat the work element
+ descriptor as an effective address and
+ prefault what it points to.
+ all all segments process calling
+ START_WORK maps.
+ ======================= ======================================
+
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<afu>/reset
card. A power cycle is required to load the image.
"none" could be useful for debugging because the trace arrays
are preserved.
+
"user" and "factory" means PERST will cause either the user or
user or factory image to be loaded.
Default is to reload on PERST whichever image the card has
Description: read/write
Trust that when an image is reloaded via PERST, it will not
have changed.
- 0 = don't trust, the image may be different (default)
- 1 = trust that the image will not change.
+
+ == =================================================
+ 0 don't trust, the image may be different (default)
+ 1 trust that the image will not change.
+ == =================================================
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<card>/psl_timebase_synced
driver should provide the list of available frequencies
with its profile. If need to reset the statistics of devfreq
behavior on a specific device, enter 0(zero) to 'trans_stat'
- as following:
+ as following::
+
echo 0 > /sys/class/devfreq/.../trans_stat
What: /sys/class/devfreq/.../userspace/set_freq
This work timer is used by devfreq workqueue in order to
monitor the device status such as utilization. The user
can change the work timer on runtime according to their demand
- as following:
+ as following::
+
echo deferrable > /sys/class/devfreq/.../timer
echo delayed > /sys/class/devfreq/.../timer
This will be one of the following strings:
- 'consumer unbind'
- 'supplier unbind'
- 'never'
+ - 'consumer unbind'
+ - 'supplier unbind'
+ - 'never'
'consumer unbind' means the device link will be removed when
the consumer's driver is unbound from the consumer device.
This will be one of the following strings:
- '0' - Does not affect runtime power management
- '1' - Affects runtime power management
+ === ========================================
+ '0' Does not affect runtime power management
+ '1' Affects runtime power management
+ === ========================================
What: /sys/class/devlink/.../status
Date: May 2020
This will be one of the following strings:
- 'not tracked'
- 'dormant'
- 'available'
- 'consumer probing'
- 'active'
- 'supplier unbinding'
- 'unknown'
+ - 'not tracked'
+ - 'dormant'
+ - 'available'
+ - 'consumer probing'
+ - 'active'
+ - 'supplier unbinding'
+ - 'unknown'
'not tracked' means this device link does not track the status
and has no impact on the binding, unbinding and syncing the
This will be one of the following strings:
+ === ================================
'0'
- '1' - Affects runtime power management
+ '1' Affects runtime power management
+ === ================================
'0' means the device link can affect other device behaviors
like binding/unbinding, suspend/resume, runtime power
callback.
If the default callback for showing function is used, the
- format is like this:
- # cat state
- USB_OTG=1
- HDMI=0
- TA=1
- EAR_JACK=0
- #
+ format is like this::
+
+ # cat state
+ USB_OTG=1
+ HDMI=0
+ TA=1
+ EAR_JACK=0
+ #
+
In this example, the extcon device has USB_OTG and TA
cables attached and HDMI and EAR_JACK cables detached.
In order to update the state of an extcon device, enter a hex
- state number starting with 0x:
- # echo 0xHEX > state
+ state number starting with 0x::
+
+ # echo 0xHEX > state
This updates the whole state of the extcon device.
Inputs of all the methods are required to meet the
Description:
Shows the relations of mutually exclusiveness. For example,
if the mutually_exclusive array of extcon device is
- {0x3, 0x5, 0xC, 0x0}, then the output is:
- # ls mutually_exclusive/
- 0x3
- 0x5
- 0xc
- #
+ {0x3, 0x5, 0xC, 0x0}, then the output is::
+
+ # ls mutually_exclusive/
+ 0x3
+ 0x5
+ 0xc
+ #
Note that mutually_exclusive is a sub-directory of the extcon
device and the file names under the mutually_exclusive
* firmware request = firmware class request in progress
* firmware request error = firmware request failed
* write init = preparing FPGA for programming
- * write init error = Error while preparing FPGA for
- programming
+ * write init error = Error while preparing FPGA for programming
* write = FPGA ready to receive image data
* write error = Error while programming
* write complete = Doing post programming steps
programming errors to userspace. This is a list of strings for
the supported status.
- * reconfig operation error - invalid operations detected by
+ * reconfig operation error - invalid operations detected by
reconfiguration hardware.
e.g. start reconfiguration
with errors not cleared
The GNSS receiver type. The currently identified types reflect
the protocol(s) supported by the receiver:
+ ====== ===========
"NMEA" NMEA 0183
"SiRF" SiRF Binary
"UBX" UBX
+ ====== ===========
Note that also non-"NMEA" type receivers typically support a
subset of NMEA 0183 with vendor extensions (e.g. to allow
KernelVersion: 2.6.17
Contact: Richard Purdie <rpurdie@rpsys.net>
Description:
- Set the brightness of the LED. Most LEDs don't
- have hardware brightness support, so will just be turned on for
- non-zero brightness settings. The value is between 0 and
+ Set the brightness of the LED.
+
+ Most LEDs don't have hardware brightness support, so will
+ just be turned on for non-zero brightness settings.
+
+ .. Note::
+
+ For multicolor LEDs, writing to this file will update all
+ LEDs within the group to a calculated percentage of what
+ each color LED intensity is set to.
+
+ The percentage is calculated for each grouped LED via
+ the equation below::
+
+ led_brightness = brightness * multi_intensity/max_brightness
+
+ For additional details please refer to
+ Documentation/leds/leds-class-multicolor.rst.
+
+ The value is between 0 and
/sys/class/leds/<led>/max_brightness.
Writing 0 to this file clears active trigger.
Writing non-zero to this file while trigger is active changes the
top brightness trigger is going to use.
+
+
What: /sys/class/leds/<led>/max_brightness
Date: March 2006
KernelVersion: 2.6.17
Description:
Set the trigger for this LED. A trigger is a kernel based source
of LED events.
+
You can change triggers in a similar manner to the way an IO
scheduler is chosen. Trigger specific parameters can appear in
/sys/class/leds/<led> once a given trigger is selected. For
- their documentation see sysfs-class-led-trigger-*.
+ their documentation see `sysfs-class-led-trigger-*`.
What: /sys/class/leds/<led>/inverted
Date: January 2011
-What: /sys/class/leds/<led>/hw_pattern
-Date: September 2019
-KernelVersion: 5.5
-Description:
- Specify a hardware pattern for the EL15203000 LED.
- The LEDs board supports only predefined patterns by firmware
- for specific LEDs.
-
- Breathing mode for Screen frame light tube:
- "0 4000 1 4000"
-
- ^
- |
- Max-| ---
- | / \
- | / \
- | / \ /
- | / \ /
- Min-|- ---
- |
- 0------4------8--> time (sec)
-
- Cascade mode for Pipe LED:
- "1 800 2 800 4 800 8 800 16 800"
-
- ^
- |
- 0 On -|----+ +----+ +---
- | | | | |
- Off-| +-------------------+ +-------------------+
- |
- 1 On -| +----+ +----+
- | | | | |
- Off |----+ +-------------------+ +------------------
- |
- 2 On -| +----+ +----+
- | | | | |
- Off-|---------+ +-------------------+ +-------------
- |
- 3 On -| +----+ +----+
- | | | | |
- Off-|--------------+ +-------------------+ +--------
- |
- 4 On -| +----+ +----+
- | | | | |
- Off-|-------------------+ +-------------------+ +---
- |
- 0---0.8--1.6--2.4--3.2---4---4.8--5.6--6.4--7.2---8--> time (sec)
-
- Inverted cascade mode for Pipe LED:
- "30 800 29 800 27 800 23 800 15 800"
-
- ^
- |
- 0 On -| +-------------------+ +-------------------+
- | | | | |
- Off-|----+ +----+ +---
- |
- 1 On -|----+ +-------------------+ +------------------
- | | | | |
- Off | +----+ +----+
- |
- 2 On -|---------+ +-------------------+ +-------------
- | | | | |
- Off-| +----+ +----+
- |
- 3 On -|--------------+ +-------------------+ +--------
- | | | | |
- Off-| +----+ +----+
- |
- 4 On -|-------------------+ +-------------------+ +---
- | | | | |
- Off-| +----+ +----+
- |
- 0---0.8--1.6--2.4--3.2---4---4.8--5.6--6.4--7.2---8--> time (sec)
-
- Bounce mode for Pipe LED:
- "1 800 2 800 4 800 8 800 16 800 16 800 8 800 4 800 2 800 1 800"
-
- ^
- |
- 0 On -|----+ +--------
- | | |
- Off-| +---------------------------------------+
- |
- 1 On -| +----+ +----+
- | | | | |
- Off |----+ +-----------------------------+ +--------
- |
- 2 On -| +----+ +----+
- | | | | |
- Off-|---------+ +-------------------+ +-------------
- |
- 3 On -| +----+ +----+
- | | | | |
- Off-|--------------+ +---------+ +------------------
- |
- 4 On -| +---------+
- | | |
- Off-|-------------------+ +-----------------------
- |
- 0---0.8--1.6--2.4--3.2---4---4.8--5.6--6.4--7.2---8--> time (sec)
-
- Inverted bounce mode for Pipe LED:
- "30 800 29 800 27 800 23 800 15 800 15 800 23 800 27 800 29 800 30 800"
-
- ^
- |
- 0 On -| +---------------------------------------+
- | | |
- Off-|----+ +--------
- |
- 1 On -|----+ +-----------------------------+ +--------
- | | | | |
- Off | +----+ +----+
- |
- 2 On -|---------+ +-------------------+ +-------------
- | | | | |
- Off-| +----+ +----+
- |
- 3 On -|--------------+ +---------+ +------------------
- | | | | |
- Off-| +----+ +----+
- |
- 4 On -|-------------------+ +-----------------------
- | | |
- Off-| +---------+
- |
- 0---0.8--1.6--2.4--3.2---4---4.8--5.6--6.4--7.2---8--> time (sec)
-
What: /sys/class/leds/<led>/repeat
Date: September 2019
KernelVersion: 5.5
Set the ALS output channel to use as input in
ALS-current-control mode (1, 2), where:
- 1 - out_current1
- 2 - out_current2
+ == ============
+ 1 out_current1
+ 2 out_current2
+ == ============
What: /sys/class/leds/<led>/als_en
Date: May 2012
Description:
Set the pattern generator fall and rise times (0..7), where:
- 0 - 2048 us
- 1 - 262 ms
- 2 - 524 ms
- 3 - 1.049 s
- 4 - 2.097 s
- 5 - 4.194 s
- 6 - 8.389 s
- 7 - 16.78 s
+ == =======
+ 0 2048 us
+ 1 262 ms
+ 2 524 ms
+ 3 1.049 s
+ 4 2.097 s
+ 5 4.194 s
+ 6 8.389 s
+ 7 16.78 s
+ == =======
What: /sys/class/leds/<led>/id
Date: April 2012
Description:
Set the brightness-mapping mode (0, 1), where:
- 0 - exponential mode
- 1 - linear mode
+ == ================
+ 0 exponential mode
+ 1 linear mode
+ == ================
What: /sys/class/leds/<led>/pwm
Date: April 2012
Description:
Set the PWM-input control mask (5 bits), where:
- bit 5 - PWM-input enabled in Zone 4
- bit 4 - PWM-input enabled in Zone 3
- bit 3 - PWM-input enabled in Zone 2
- bit 2 - PWM-input enabled in Zone 1
- bit 1 - PWM-input enabled in Zone 0
- bit 0 - PWM-input enabled
+ ===== ===========================
+ bit 5 PWM-input enabled in Zone 4
+ bit 4 PWM-input enabled in Zone 3
+ bit 3 PWM-input enabled in Zone 2
+ bit 2 PWM-input enabled in Zone 1
+ bit 1 PWM-input enabled in Zone 0
+ bit 0 PWM-input enabled
+ ===== ===========================
+++ /dev/null
-What: /sys/class/leds/<led>/hw_pattern
-Date: September 2018
-KernelVersion: 4.20
-Description:
- Specify a hardware pattern for the SC27XX LED. For the SC27XX
- LED controller, it only supports 4 stages to make a single
- hardware pattern, which is used to configure the rise time,
- high time, fall time and low time for the breathing mode.
-
- For the breathing mode, the SC27XX LED only expects one brightness
- for the high stage. To be compatible with the hardware pattern
- format, we should set brightness as 0 for rise stage, fall
- stage and low stage.
-
- Min stage duration: 125 ms
- Max stage duration: 31875 ms
-
- Since the stage duration step is 125 ms, the duration should be
- a multiplier of 125, like 125ms, 250ms, 375ms, 500ms ... 31875ms.
-
- Thus the format of the hardware pattern values should be:
- "0 rise_duration brightness high_duration 0 fall_duration 0 low_duration".
Flash faults are re-read after strobing the flash. Possible
flash faults:
- * led-over-voltage - flash controller voltage to the flash LED
+ * led-over-voltage
+ flash controller voltage to the flash LED
has exceeded the limit specific to the flash controller
- * flash-timeout-exceeded - the flash strobe was still on when
+ * flash-timeout-exceeded
+ the flash strobe was still on when
the timeout set by the user has expired; not all flash
controllers may set this in all such conditions
- * controller-over-temperature - the flash controller has
+ * controller-over-temperature
+ the flash controller has
overheated
- * controller-short-circuit - the short circuit protection
+ * controller-short-circuit
+ the short circuit protection
of the flash controller has been triggered
- * led-power-supply-over-current - current in the LED power
+ * led-power-supply-over-current
+ current in the LED power
supply has exceeded the limit specific to the flash
controller
- * indicator-led-fault - the flash controller has detected
+ * indicator-led-fault
+ the flash controller has detected
a short or open circuit condition on the indicator LED
- * led-under-voltage - flash controller voltage to the flash
+ * led-under-voltage
+ flash controller voltage to the flash
LED has been below the minimum limit specific to
the flash
- * controller-under-voltage - the input voltage of the flash
+ * controller-under-voltage
+ the input voltage of the flash
controller is below the limit under which strobing the
flash at full current will not be possible;
the condition persists until this flag is no longer set
- * led-over-temperature - the temperature of the LED has exceeded
+ * led-over-temperature
+ the temperature of the LED has exceeded
its allowed upper limit
-What: /sys/class/leds/<led>/brightness
-Date: March 2020
-KernelVersion: 5.9
-Contact: Dan Murphy <dmurphy@ti.com>
-Description: read/write
- Writing to this file will update all LEDs within the group to a
- calculated percentage of what each color LED intensity is set
- to. The percentage is calculated for each grouped LED via the
- equation below:
-
- led_brightness = brightness * multi_intensity/max_brightness
-
- For additional details please refer to
- Documentation/leds/leds-class-multicolor.rst.
-
- The value of the LED is from 0 to
- /sys/class/leds/<led>/max_brightness.
What: /sys/class/leds/<led>/multi_index
Date: March 2020
as an array of strings as they are indexed in the
multi_intensity file.
+ For additional details please refer to
+ Documentation/leds/leds-class-multicolor.rst.
+
What: /sys/class/leds/<led>/multi_intensity
Date: March 2020
KernelVersion: 5.9
This file contains array of integers. Order of components is
described by the multi_index array. The maximum intensity should
not exceed /sys/class/leds/<led>/max_brightness.
+
+ For additional details please refer to
+ Documentation/leds/leds-class-multicolor.rst.
Contact: linux-leds@vger.kernel.org
Description:
Signal the link state of the named network device.
+
If set to 0 (default), the LED's normal state is off.
+
If set to 1, the LED's normal state reflects the link state
of the named network device.
Setting this value also immediately changes the LED state.
+
What: /sys/class/leds/<led>/tx
Date: Dec 2017
KernelVersion: 4.16
Contact: linux-leds@vger.kernel.org
Description:
Signal transmission of data on the named network device.
+
If set to 0 (default), the LED will not blink on transmission.
+
If set to 1, the LED will blink for the milliseconds specified
in interval to signal transmission.
Contact: linux-leds@vger.kernel.org
Description:
Signal reception of data on the named network device.
+
If set to 0 (default), the LED will not blink on reception.
+
If set to 1, the LED will blink for the milliseconds specified
in interval to signal reception.
Since different LED hardware can have different semantics of
hardware patterns, each driver is expected to provide its own
- description for the hardware patterns in their ABI documentation
- file.
+ description for the hardware patterns in their documentation
+ file at Documentation/leds/.
What: /sys/class/leds/<led>/repeat
Date: September 2018
selected for the USB port trigger. Selecting ports makes trigger
observing them for any connected devices and lighting on LED if
there are any.
+
Echoing "1" value selects USB port. Echoing "0" unselects it.
Current state can be also read.
of one LED will update the mode of its two sibling devices as
well. Possible values are:
- 0 - normal
- 1 - audio
- 2 - breathing
+ == =========
+ 0 normal
+ 1 audio
+ 2 breathing
+ == =========
Normal: LEDs are fully on when enabled
Audio: LEDs brightness depends on sound level
When read, this entry provides the current state of an Intel
MIC device in the context of the card OS. Possible values that
will be read are:
- "ready" - The MIC device is ready to boot the card OS. On
- reading this entry after an OSPM resume, a "boot" has to be
- written to this entry if the card was previously shutdown
- during OSPM suspend.
- "booting" - The MIC device has initiated booting a card OS.
- "online" - The MIC device has completed boot and is online
- "shutting_down" - The card OS is shutting down.
- "resetting" - A reset has been initiated for the MIC device
- "reset_failed" - The MIC device has failed to reset.
+
+
+ =============== ===============================================
+ "ready" The MIC device is ready to boot the card OS.
+ On reading this entry after an OSPM resume,
+ a "boot" has to be written to this entry if
+ the card was previously shutdown during OSPM
+ suspend.
+ "booting" The MIC device has initiated booting a card OS.
+ "online" The MIC device has completed boot and is online
+ "shutting_down" The card OS is shutting down.
+ "resetting" A reset has been initiated for the MIC device
+ "reset_failed" The MIC device has failed to reset.
+ =============== ===============================================
When written, this sysfs entry triggers different state change
operations depending upon the current state of the card OS.
Acceptable values are:
- "boot" - Boot the card OS image specified by the combination
- of firmware, ramdisk, cmdline and bootmode
- sysfs entries.
- "reset" - Initiates device reset.
- "shutdown" - Initiates card OS shutdown.
+
+
+ ========== ===================================================
+ "boot" Boot the card OS image specified by the combination
+ of firmware, ramdisk, cmdline and bootmode
+ sysfs entries.
+ "reset" Initiates device reset.
+ "shutdown" Initiates card OS shutdown.
+ ========== ===================================================
What: /sys/class/mic/mic(x)/shutdown_status
Date: October 2013
OS can shutdown because of various reasons. When read, this
entry provides the status on why the card OS was shutdown.
Possible values are:
- "nop" - shutdown status is not applicable, when the card OS is
- "online"
- "crashed" - Shutdown because of a HW or SW crash.
- "halted" - Shutdown because of a halt command.
- "poweroff" - Shutdown because of a poweroff command.
- "restart" - Shutdown because of a restart command.
+
+ ========== ===================================================
+ "nop" shutdown status is not applicable, when the card OS
+ is "online"
+ "crashed" Shutdown because of a HW or SW crash.
+ "halted" Shutdown because of a halt command.
+ "poweroff" Shutdown because of a poweroff command.
+ "restart" Shutdown because of a restart command.
+ ========== ===================================================
What: /sys/class/mic/mic(x)/cmdline
Date: October 2013
Contact: netdev@vger.kernel.org
Description:
Indicates the name assignment type. Possible values are:
- 1: enumerated by the kernel, possibly in an unpredictable way
- 2: predictably named by the kernel
- 3: named by userspace
- 4: renamed
+
+ == ==========================================================
+ 1 enumerated by the kernel, possibly in an unpredictable way
+ 2 predictably named by the kernel
+ 3 named by userspace
+ 4 renamed
+ == ==========================================================
What: /sys/class/net/<iface>/addr_assign_type
Date: July 2010
Contact: netdev@vger.kernel.org
Description:
Indicates the address assignment type. Possible values are:
- 0: permanent address
- 1: randomly generated
- 2: stolen from another device
- 3: set using dev_set_mac_address
+
+ == =============================
+ 0 permanent address
+ 1 randomly generated
+ 2 stolen from another device
+ 3 set using dev_set_mac_address
+ == =============================
What: /sys/class/net/<iface>/addr_len
Date: April 2005
Default value 0 does not forward any link local frames.
Restricted bits:
- 0: 01-80-C2-00-00-00 Bridge Group Address used for STP
- 1: 01-80-C2-00-00-01 (MAC Control) 802.3 used for MAC PAUSE
- 2: 01-80-C2-00-00-02 (Link Aggregation) 802.3ad
+
+ == ========================================================
+ 0 01-80-C2-00-00-00 Bridge Group Address used for STP
+ 1 01-80-C2-00-00-01 (MAC Control) 802.3 used for MAC PAUSE
+ 2 01-80-C2-00-00-02 (Link Aggregation) 802.3ad
+ == ========================================================
Any values not setting these bits can be used. Take special
care when forwarding control frames e.g. 802.1X-PAE or LLDP.
Description:
Indicates the current physical link state of the interface.
Posssible values are:
- 0: physical link is down
- 1: physical link is up
+
+ == =====================
+ 0 physical link is down
+ 1 physical link is up
+ == =====================
Note: some special devices, e.g: bonding and team drivers will
allow this attribute to be written to force a link state for
Description:
Indicates whether the interface is under test. Possible
values are:
- 0: interface is not being tested
- 1: interface is being tested
+
+ == =============================
+ 0 interface is not being tested
+ 1 interface is being tested
+ == =============================
When an interface is under test, it cannot be expected
to pass packets as normal.
Description:
Indicates the interface latest or current duplex value. Possible
values are:
- half: half duplex
- full: full duplex
+
+ ==== ===========
+ half half duplex
+ full full duplex
+ ==== ===========
Note: This attribute is only valid for interfaces that implement
the ethtool get_link_ksettings method (mostly Ethernet).
Indicates the interface link mode, as a decimal number. This
attribute should be used in conjunction with 'dormant' attribute
to determine the interface usability. Possible values:
- 0: default link mode
- 1: dormant link mode
+
+ == =================
+ 0 default link mode
+ 1 dormant link mode
+ == =================
What: /sys/class/net/<iface>/mtu
Date: April 2005
Contact: netdev@vger.kernel.org
Description:
Indicates the interface RFC2863 operational state as a string.
+
Possible values are:
+
"unknown", "notpresent", "down", "lowerlayerdown", "testing",
"dormant", "up".
KernelVersion: 3.16
Contact: Bjørn Mork <bjorn@mork.no>
Description:
- Bit 0: 16-bit NTB supported (set to 1)
- Bit 1: 32-bit NTB supported
- Bits 2 – 15: reserved (reset to zero; must be ignored by host)
+ - Bit 0: 16-bit NTB supported (set to 1)
+ - Bit 1: 32-bit NTB supported
+ - Bits 2 – 15: reserved (reset to zero; must be ignored by host)
What: /sys/class/net/<iface>/cdc_ncm/dwNtbInMaxSize
Date: May 2014
Ethernet driver during bus enumeration, encoded in string.
This interface mode is used to configure the Ethernet MAC with the
appropriate mode for its data lines to the PHY hardware.
+
Possible values are:
+
<empty> (not available), mii, gmii, sgmii, tbi, rev-mii,
rmii, rgmii, rgmii-id, rgmii-rxid, rgmii-txid, rtbi, smii
xgmii, moca, qsgmii, trgmii, 1000base-x, 2500base-x, rxaui,
Description: read only
Number of contexts for the AFU, in the format <n>/<max>
where:
- n: number of currently active contexts, for debug
- max: maximum number of contexts supported by the AFU
+
+ ==== ===============================================
+ n number of currently active contexts, for debug
+ max maximum number of contexts supported by the AFU
+ ==== ===============================================
What: /sys/class/ocxl/<afu name>/pp_mmio_size
Date: January 2018
Description: read/write
Control whether the FPGA is reloaded on a link reset. Enabled
through a vendor-specific logic block on the FPGA.
- 0 Do not reload FPGA image from flash
- 1 Reload FPGA image from flash
- unavailable
- The device does not support this capability
+
+ =========== ===========================================
+ 0 Do not reload FPGA image from flash
+ 1 Reload FPGA image from flash
+ unavailable The device does not support this capability
+ =========== ===========================================
Contact: Thomas Maier <balagi@justmail.de>
Description:
- add: (WO) Write a block device id (major:minor) to
+ ========== ==============================================
+ add (WO) Write a block device id (major:minor) to
create a new pktcdvd device and map it to the
block device.
- remove: (WO) Write the pktcdvd device id (major:minor)
+ remove (WO) Write the pktcdvd device id (major:minor)
to remove the pktcdvd device.
- device_map: (RO) Shows the device mapping in format:
+ device_map (RO) Shows the device mapping in format:
pktcdvd[0-7] <pktdevid> <blkdevid>
+ ========== ==============================================
What: /sys/class/pktcdvd/pktcdvd[0-7]/dev
KernelVersion: 2.6.20
Contact: Thomas Maier <balagi@justmail.de>
Description:
- size: (RO) Contains the size of the bio write queue.
+ ============== ================================================
+ size (RO) Contains the size of the bio write queue.
- congestion_off: (RW) If bio write queue size is below this mark,
+ congestion_off (RW) If bio write queue size is below this mark,
accept new bio requests from the block layer.
- congestion_on: (RW) If bio write queue size is higher as this
+ congestion_on (RW) If bio write queue size is higher as this
mark, do no longer accept bio write requests
from the block layer and wait till the pktcdvd
device has processed enough bio's so that bio
write queue size is below congestion off mark.
A value of <= 0 disables congestion control.
+ ============== ================================================
Example:
--------
-To use the pktcdvd sysfs interface directly, you can do:
-
-# create a new pktcdvd device mapped to /dev/hdc
-echo "22:0" >/sys/class/pktcdvd/add
-cat /sys/class/pktcdvd/device_map
-# assuming device pktcdvd0 was created, look at stat's
-cat /sys/class/pktcdvd/pktcdvd0/stat/kb_written
-# print the device id of the mapped block device
-fgrep pktcdvd0 /sys/class/pktcdvd/device_map
-# remove device, using pktcdvd0 device id 253:0
-echo "253:0" >/sys/class/pktcdvd/remove
+To use the pktcdvd sysfs interface directly, you can do::
+
+ # create a new pktcdvd device mapped to /dev/hdc
+ echo "22:0" >/sys/class/pktcdvd/add
+ cat /sys/class/pktcdvd/device_map
+ # assuming device pktcdvd0 was created, look at stat's
+ cat /sys/class/pktcdvd/pktcdvd0/stat/kb_written
+ # print the device id of the mapped block device
+ fgrep pktcdvd0 /sys/class/pktcdvd/device_map
+ # remove device, using pktcdvd0 device id 253:0
+ echo "253:0" >/sys/class/pktcdvd/remove
-===== General Properties =====
+**General Properties**
What: /sys/class/power_supply/<supply_name>/manufacturer
Date: May 2007
Access: Read
Valid values: "Battery", "UPS", "Mains", "USB", "Wireless"
-===== Battery Properties =====
+**Battery and USB properties**
+
+What: /sys/class/power_supply/<supply_name>/current_avg
+Date: May 2007
+Contact: linux-pm@vger.kernel.org
+Description:
+ Battery:
+
+ Reports an average IBAT current reading for the battery, over
+ a fixed period. Normally devices will provide a fixed interval
+ in which they average readings to smooth out the reported
+ value.
+
+ USB:
+
+ Reports an average IBUS current reading over a fixed period.
+ Normally devices will provide a fixed interval in which they
+ average readings to smooth out the reported value.
+
+ Access: Read
+
+ Valid values: Represented in microamps. Negative values are
+ used for discharging batteries, positive values for charging
+ batteries and for USB IBUS current.
+
+What: /sys/class/power_supply/<supply_name>/current_max
+Date: October 2010
+Contact: linux-pm@vger.kernel.org
+Description:
+ Battery:
+
+ Reports the maximum IBAT current allowed into the battery.
+
+ USB:
+
+ Reports the maximum IBUS current the supply can support.
+
+ Access: Read
+ Valid values: Represented in microamps
+
+What: /sys/class/power_supply/<supply_name>/current_now
+Date: May 2007
+Contact: linux-pm@vger.kernel.org
+Description:
+
+ Battery:
+
+ Reports an instant, single IBAT current reading for the
+ battery. This value is not averaged/smoothed.
+
+ Access: Read
+
+ USB:
+
+ Reports the IBUS current supplied now. This value is generally
+ read-only reporting, unless the 'online' state of the supply
+ is set to be programmable, in which case this value can be set
+ within the reported min/max range.
+
+ Access: Read, Write
+
+ Valid values: Represented in microamps. Negative values are
+ used for discharging batteries, positive values for charging
+ batteries and for USB IBUS current.
+
+What: /sys/class/power_supply/<supply_name>/temp
+Date: May 2007
+Contact: linux-pm@vger.kernel.org
+Description:
+ Battery:
+
+ Reports the current TBAT battery temperature reading.
+
+ USB:
+
+ Reports the current supply temperature reading. This would
+ normally be the internal temperature of the device itself
+ (e.g TJUNC temperature of an IC)
+
+ Access: Read
+
+ Valid values: Represented in 1/10 Degrees Celsius
+
+What: /sys/class/power_supply/<supply_name>/temp_alert_max
+Date: July 2012
+Contact: linux-pm@vger.kernel.org
+Description:
+ Battery:
+
+ Maximum TBAT temperature trip-wire value where the supply will
+ notify user-space of the event.
+
+ USB:
+
+ Maximum supply temperature trip-wire value where the supply
+ will notify user-space of the event.
+
+ This is normally used for the charging scenario where
+ user-space needs to know if the temperature has crossed an
+ upper threshold so it can take appropriate action (e.g. warning
+ user that the temperature is critically high, and charging has
+ stopped).
+
+ Access: Read
+
+ Valid values: Represented in 1/10 Degrees Celsius
+
+What: /sys/class/power_supply/<supply_name>/temp_alert_min
+Date: July 2012
+Contact: linux-pm@vger.kernel.org
+Description:
+
+ Battery:
+
+ Minimum TBAT temperature trip-wire value where the supply will
+ notify user-space of the event.
+
+ USB:
+
+ Minimum supply temperature trip-wire value where the supply
+ will notify user-space of the event.
+
+ This is normally used for the charging scenario where user-space
+ needs to know if the temperature has crossed a lower threshold
+ so it can take appropriate action (e.g. warning user that
+ temperature level is high, and charging current has been
+ reduced accordingly to remedy the situation).
+
+ Access: Read
+
+ Valid values: Represented in 1/10 Degrees Celsius
+
+What: /sys/class/power_supply/<supply_name>/temp_max
+Date: July 2014
+Contact: linux-pm@vger.kernel.org
+Description:
+ Battery:
+
+ Reports the maximum allowed TBAT battery temperature for
+ charging.
+
+ USB:
+
+ Reports the maximum allowed supply temperature for operation.
+
+ Access: Read
+
+ Valid values: Represented in 1/10 Degrees Celsius
+
+What: /sys/class/power_supply/<supply_name>/temp_min
+Date: July 2014
+Contact: linux-pm@vger.kernel.org
+Description:
+ Battery:
+
+ Reports the minimum allowed TBAT battery temperature for
+ charging.
+
+ USB:
+
+ Reports the minimum allowed supply temperature for operation.
+
+ Access: Read
+
+ Valid values: Represented in 1/10 Degrees Celsius
+
+What: /sys/class/power_supply/<supply_name>/voltage_max,
+Date: January 2008
+Contact: linux-pm@vger.kernel.org
+Description:
+ Battery:
+
+ Reports the maximum safe VBAT voltage permitted for the
+ battery, during charging.
+
+ USB:
+
+ Reports the maximum VBUS voltage the supply can support.
+
+ Access: Read
+
+ Valid values: Represented in microvolts
+
+What: /sys/class/power_supply/<supply_name>/voltage_min,
+Date: January 2008
+Contact: linux-pm@vger.kernel.org
+Description:
+ Battery:
+
+ Reports the minimum safe VBAT voltage permitted for the
+ battery, during discharging.
+
+ USB:
+
+ Reports the minimum VBUS voltage the supply can support.
+
+ Access: Read
+
+ Valid values: Represented in microvolts
+
+What: /sys/class/power_supply/<supply_name>/voltage_now,
+Date: May 2007
+Contact: linux-pm@vger.kernel.org
+Description:
+ Battery:
+
+ Reports an instant, single VBAT voltage reading for the
+ battery. This value is not averaged/smoothed.
+
+ Access: Read
+
+ USB:
+
+ Reports the VBUS voltage supplied now. This value is generally
+ read-only reporting, unless the 'online' state of the supply
+ is set to be programmable, in which case this value can be set
+ within the reported min/max range.
+
+ Access: Read, Write
+
+ Valid values: Represented in microvolts
+
+**Battery Properties**
What: /sys/class/power_supply/<supply_name>/capacity
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Fine grain representation of battery capacity.
+
Access: Read
+
Valid values: 0 - 100 (percent)
What: /sys/class/power_supply/<supply_name>/capacity_alert_max
low).
Access: Read, Write
+
Valid values: 0 - 100 (percent)
What: /sys/class/power_supply/<supply_name>/capacity_alert_min
critically low).
Access: Read, Write
+
Valid values: 0 - 100 (percent)
What: /sys/class/power_supply/<supply_name>/capacity_error_margin
completely useless.
Access: Read
+
Valid values: 0 - 100 (percent)
What: /sys/class/power_supply/<supply_name>/capacity_level
Coarse representation of battery capacity.
Access: Read
- Valid values: "Unknown", "Critical", "Low", "Normal", "High",
- "Full"
-
-What: /sys/class/power_supply/<supply_name>/current_avg
-Date: May 2007
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports an average IBAT current reading for the battery, over a
- fixed period. Normally devices will provide a fixed interval in
- which they average readings to smooth out the reported value.
-
- Access: Read
- Valid values: Represented in microamps. Negative values are used
- for discharging batteries, positive values for charging batteries.
-What: /sys/class/power_supply/<supply_name>/current_max
-Date: October 2010
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports the maximum IBAT current allowed into the battery.
-
- Access: Read
- Valid values: Represented in microamps
-
-What: /sys/class/power_supply/<supply_name>/current_now
-Date: May 2007
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports an instant, single IBAT current reading for the battery.
- This value is not averaged/smoothed.
-
- Access: Read
- Valid values: Represented in microamps. Negative values are used
- for discharging batteries, positive values for charging batteries.
+ Valid values:
+ "Unknown", "Critical", "Low", "Normal", "High",
+ "Full"
What: /sys/class/power_supply/<supply_name>/charge_control_limit
Date: Oct 2012
throttling for thermal cooling or improving battery health.
Access: Read, Write
+
Valid values: Represented in microamps
What: /sys/class/power_supply/<supply_name>/charge_control_limit_max
Maximum legal value for the charge_control_limit property.
Access: Read
+
Valid values: Represented in microamps
What: /sys/class/power_supply/<supply_name>/charge_control_start_threshold
stop.
Access: Read, Write
+
Valid values: 0 - 100 (percent)
What: /sys/class/power_supply/<supply_name>/charge_type
different algorithm.
Access: Read, Write
- Valid values: "Unknown", "N/A", "Trickle", "Fast", "Standard",
+
+ Valid values:
+ "Unknown", "N/A", "Trickle", "Fast", "Standard",
"Adaptive", "Custom"
What: /sys/class/power_supply/<supply_name>/charge_term_current
when the battery is considered full and charging should end.
Access: Read
+
Valid values: Represented in microamps
What: /sys/class/power_supply/<supply_name>/health
functionality.
Access: Read
- Valid values: "Unknown", "Good", "Overheat", "Dead",
+
+ Valid values:
+ "Unknown", "Good", "Overheat", "Dead",
"Over voltage", "Unspecified failure", "Cold",
"Watchdog timer expire", "Safety timer expire",
"Over current", "Calibration required", "Warm",
for a battery charge cycle.
Access: Read
+
Valid values: Represented in microamps
What: /sys/class/power_supply/<supply_name>/present
Reports whether a battery is present or not in the system.
Access: Read
+
Valid values:
+
+ == =======
0: Absent
1: Present
+ == =======
What: /sys/class/power_supply/<supply_name>/status
Date: May 2007
used to enable/disable charging to the battery.
Access: Read, Write
- Valid values: "Unknown", "Charging", "Discharging",
+
+ Valid values:
+ "Unknown", "Charging", "Discharging",
"Not charging", "Full"
What: /sys/class/power_supply/<supply_name>/technology
Describes the battery technology supported by the supply.
Access: Read
- Valid values: "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe",
- "NiCd", "LiMn"
-
-What: /sys/class/power_supply/<supply_name>/temp
-Date: May 2007
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports the current TBAT battery temperature reading.
-
- Access: Read
- Valid values: Represented in 1/10 Degrees Celsius
-
-What: /sys/class/power_supply/<supply_name>/temp_alert_max
-Date: July 2012
-Contact: linux-pm@vger.kernel.org
-Description:
- Maximum TBAT temperature trip-wire value where the supply will
- notify user-space of the event. This is normally used for the
- battery charging scenario where user-space needs to know the
- battery temperature has crossed an upper threshold so it can
- take appropriate action (e.g. warning user that battery level is
- critically high, and charging has stopped).
-
- Access: Read
- Valid values: Represented in 1/10 Degrees Celsius
-
-What: /sys/class/power_supply/<supply_name>/temp_alert_min
-Date: July 2012
-Contact: linux-pm@vger.kernel.org
-Description:
- Minimum TBAT temperature trip-wire value where the supply will
- notify user-space of the event. This is normally used for the
- battery charging scenario where user-space needs to know the
- battery temperature has crossed a lower threshold so it can take
- appropriate action (e.g. warning user that battery level is
- high, and charging current has been reduced accordingly to
- remedy the situation).
-
- Access: Read
- Valid values: Represented in 1/10 Degrees Celsius
-
-What: /sys/class/power_supply/<supply_name>/temp_max
-Date: July 2014
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports the maximum allowed TBAT battery temperature for
- charging.
-
- Access: Read
- Valid values: Represented in 1/10 Degrees Celsius
-What: /sys/class/power_supply/<supply_name>/temp_min
-Date: July 2014
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports the minimum allowed TBAT battery temperature for
- charging.
+ Valid values:
+ "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe",
+ "NiCd", "LiMn"
- Access: Read
- Valid values: Represented in 1/10 Degrees Celsius
What: /sys/class/power_supply/<supply_name>/voltage_avg,
Date: May 2007
which they average readings to smooth out the reported value.
Access: Read
- Valid values: Represented in microvolts
-
-What: /sys/class/power_supply/<supply_name>/voltage_max,
-Date: January 2008
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports the maximum safe VBAT voltage permitted for the battery,
- during charging.
-
- Access: Read
- Valid values: Represented in microvolts
-
-What: /sys/class/power_supply/<supply_name>/voltage_min,
-Date: January 2008
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports the minimum safe VBAT voltage permitted for the battery,
- during discharging.
- Access: Read
Valid values: Represented in microvolts
-What: /sys/class/power_supply/<supply_name>/voltage_now,
-Date: May 2007
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports an instant, single VBAT voltage reading for the battery.
- This value is not averaged/smoothed.
-
- Access: Read
- Valid values: Represented in microvolts
-
-===== USB Properties =====
-
-What: /sys/class/power_supply/<supply_name>/current_avg
-Date: May 2007
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports an average IBUS current reading over a fixed period.
- Normally devices will provide a fixed interval in which they
- average readings to smooth out the reported value.
-
- Access: Read
- Valid values: Represented in microamps
-
-
-What: /sys/class/power_supply/<supply_name>/current_max
-Date: October 2010
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports the maximum IBUS current the supply can support.
-
- Access: Read
- Valid values: Represented in microamps
-
-What: /sys/class/power_supply/<supply_name>/current_now
-Date: May 2007
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports the IBUS current supplied now. This value is generally
- read-only reporting, unless the 'online' state of the supply
- is set to be programmable, in which case this value can be set
- within the reported min/max range.
-
- Access: Read, Write
- Valid values: Represented in microamps
+**USB Properties**
What: /sys/class/power_supply/<supply_name>/input_current_limit
Date: July 2014
solved using power limit use input_current_limit.
Access: Read, Write
+
Valid values: Represented in microamps
What: /sys/class/power_supply/<supply_name>/input_voltage_limit
solved using power limit use input_voltage_limit.
Access: Read, Write
+
Valid values: Represented in microvolts
What: /sys/class/power_supply/<supply_name>/input_power_limit
limit only for problems that can be solved using power limit.
Access: Read, Write
+
Valid values: Represented in microwatts
What: /sys/class/power_supply/<supply_name>/online,
USB supply so voltage and current can be controlled).
Access: Read, Write
+
Valid values:
+
+ == ==================================================
0: Offline
1: Online Fixed - Fixed Voltage Supply
2: Online Programmable - Programmable Voltage Supply
-
-What: /sys/class/power_supply/<supply_name>/temp
-Date: May 2007
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports the current supply temperature reading. This would
- normally be the internal temperature of the device itself (e.g
- TJUNC temperature of an IC)
-
- Access: Read
- Valid values: Represented in 1/10 Degrees Celsius
-
-What: /sys/class/power_supply/<supply_name>/temp_alert_max
-Date: July 2012
-Contact: linux-pm@vger.kernel.org
-Description:
- Maximum supply temperature trip-wire value where the supply will
- notify user-space of the event. This is normally used for the
- charging scenario where user-space needs to know the supply
- temperature has crossed an upper threshold so it can take
- appropriate action (e.g. warning user that the supply
- temperature is critically high, and charging has stopped to
- remedy the situation).
-
- Access: Read
- Valid values: Represented in 1/10 Degrees Celsius
-
-What: /sys/class/power_supply/<supply_name>/temp_alert_min
-Date: July 2012
-Contact: linux-pm@vger.kernel.org
-Description:
- Minimum supply temperature trip-wire value where the supply will
- notify user-space of the event. This is normally used for the
- charging scenario where user-space needs to know the supply
- temperature has crossed a lower threshold so it can take
- appropriate action (e.g. warning user that the supply
- temperature is high, and charging current has been reduced
- accordingly to remedy the situation).
-
- Access: Read
- Valid values: Represented in 1/10 Degrees Celsius
-
-What: /sys/class/power_supply/<supply_name>/temp_max
-Date: July 2014
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports the maximum allowed supply temperature for operation.
-
- Access: Read
- Valid values: Represented in 1/10 Degrees Celsius
-
-What: /sys/class/power_supply/<supply_name>/temp_min
-Date: July 2014
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports the mainimum allowed supply temperature for operation.
-
- Access: Read
- Valid values: Represented in 1/10 Degrees Celsius
+ == ==================================================
What: /sys/class/power_supply/<supply_name>/usb_type
Date: March 2018
is attached.
Access: Read-Only
- Valid values: "Unknown", "SDP", "DCP", "CDP", "ACA", "C", "PD",
- "PD_DRP", "PD_PPS", "BrickID"
-
-What: /sys/class/power_supply/<supply_name>/voltage_max
-Date: January 2008
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports the maximum VBUS voltage the supply can support.
-
- Access: Read
- Valid values: Represented in microvolts
-
-What: /sys/class/power_supply/<supply_name>/voltage_min
-Date: January 2008
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports the minimum VBUS voltage the supply can support.
- Access: Read
- Valid values: Represented in microvolts
-
-What: /sys/class/power_supply/<supply_name>/voltage_now
-Date: May 2007
-Contact: linux-pm@vger.kernel.org
-Description:
- Reports the VBUS voltage supplied now. This value is generally
- read-only reporting, unless the 'online' state of the supply
- is set to be programmable, in which case this value can be set
- within the reported min/max range.
-
- Access: Read, Write
- Valid values: Represented in microvolts
+ Valid values:
+ "Unknown", "SDP", "DCP", "CDP", "ACA", "C", "PD",
+ "PD_DRP", "PD_PPS", "BrickID"
-===== Device Specific Properties =====
+**Device Specific Properties**
What: /sys/class/power/ds2760-battery.*/charge_now
Date: May 2010
will drop to 0 A) and will trigger interrupt.
Valid values:
+
- 5, 6 or 7 (hours),
- 0: disabled.
will drop to 0 A) and will trigger interrupt.
Valid values:
+
- 4 - 16 (hours), step by 2 (rounded down)
- 0: disabled.
interrupt and start top-off charging mode.
Valid values:
+
- 100000 - 200000 (microamps), step by 25000 (rounded down)
- 200000 - 350000 (microamps), step by 50000 (rounded down)
- 0: disabled.
will drop to 0 A) and will trigger interrupt.
Valid values:
+
- 0 - 70 (minutes), step by 10 (rounded down)
What: /sys/class/power_supply/bq24257-charger/ovp_voltage
device datasheet for details.
Valid values:
+
- 6000000, 6500000, 7000000, 8000000, 9000000, 9500000, 10000000,
10500000 (all uV)
lower than the set value. See device datasheet for details.
Valid values:
+
- 4200000, 4280000, 4360000, 4440000, 4520000, 4600000, 4680000,
4760000 (all uV)
the charger operates normally. See device datasheet for details.
Valid values:
+
- 1: enabled
- 0: disabled
from the system. See device datasheet for details.
Valid values:
+
- 1: enabled
- 0: disabled
manufactured.
Access: Read
+
Valid values: Reported as integer
What: /sys/class/power_supply/<supply_name>/manufacture_month
Reports the month when the device has been manufactured.
Access: Read
+
Valid values: 1-12
What: /sys/class/power_supply/<supply_name>/manufacture_day
Represents a battery impedance compensation to accelerate charging.
Access: Read, Write
+
Valid values: Represented in milli-ohms. Valid range is [0, 140].
Writing to this can disable charging.
Possible values are:
- "auto" - draw power as appropriate for detected
- power source and battery status.
- "off" - do not draw any power.
- "continuous"
- - activate mode described as "linear" in
- TWL data sheets. This uses whatever
- current is available and doesn't switch off
- when voltage drops.
- This is useful for unstable power sources
- such as bicycle dynamo, but care should
- be taken that battery is not over-charged.
+ ============= ===========================================
+ "auto" draw power as appropriate for detected
+ power source and battery status.
+ "off" do not draw any power.
+ "continuous" activate mode described as "linear" in
+ TWL data sheets. This uses whatever
+ current is available and doesn't switch off
+ when voltage drops.
+
+ This is useful for unstable power sources
+ such as bicycle dynamo, but care should
+ be taken that battery is not over-charged.
+ ============= ===========================================
What: /sys/class/power_supply/twl4030_ac/mode
Description:
Writing to this can disable charging.
Possible values are:
- "auto" - draw power as appropriate for detected
- power source and battery status.
- "off" - do not draw any power.
+
+ ====== ===========================================
+ "auto" draw power as appropriate for detected
+ power source and battery status.
+ "off" do not draw any power.
+ ====== ===========================================
Description:
What charging algorithm to use:
- Standard: Fully charges battery at a standard rate.
- Adaptive: Battery settings adaptively optimized based on
+ Standard:
+ Fully charges battery at a standard rate.
+ Adaptive:
+ Battery settings adaptively optimized based on
typical battery usage pattern.
- Fast: Battery charges over a shorter period.
- Trickle: Extends battery lifespan, intended for users who
+ Fast:
+ Battery charges over a shorter period.
+ Trickle:
+ Extends battery lifespan, intended for users who
primarily use their Chromebook while connected to AC.
- Custom: A low and high threshold percentage is specified.
+ Custom:
+ A low and high threshold percentage is specified.
Charging begins when level drops below
charge_control_start_threshold, and ceases when
level is above charge_control_end_threshold.
- Long Life: Customized charge rate for last longer battery life.
+ Long Life:
+ Customized charge rate for last longer battery life.
On Wilco device this mode is pre-configured in the factory
through EC's private PID. Swiching to a different mode will
be denied by Wilco EC when Long Life mode is enabled.
The /sys/class/rapidio_port subdirectory contains individual
subdirectories named as "rapidioN" where N = mport ID registered
with RapidIO subsystem.
+
NOTE: An mport ID is not a RapidIO destination ID assigned to a
given local mport device.
Alexandre Bounine <alexandre.bounine@idt.com>
Description:
(RO) reports RapidIO common transport system size:
+
0 = small (8-bit destination ID, max. 256 devices),
+
1 = large (16-bit destination ID, max. 65536 devices).
What: /sys/class/rapidio_port/rapidioN/port_destid
Contact: Matt Porter <mporter@kernel.crashing.org>,
Alexandre Bounine <alexandre.bounine@idt.com>
Description:
- (RO) reports RapidIO destination ID assigned to the given
- RapidIO mport device. If value 0xFFFFFFFF is returned this means
- that no valid destination ID have been assigned to the mport
- (yet). Normally, before enumeration/discovery have been executed
- only fabric enumerating mports have a valid destination ID
- assigned to them using "hdid=..." rapidio module parameter.
+
+(RO) reports RapidIO destination ID assigned to the given
+RapidIO mport device. If value 0xFFFFFFFF is returned this means
+that no valid destination ID have been assigned to the mport
+(yet). Normally, before enumeration/discovery have been executed
+only fabric enumerating mports have a valid destination ID
+assigned to them using "hdid=..." rapidio module parameter.
After enumeration or discovery was performed for a given mport device,
the corresponding subdirectory will also contain subdirectories for each
child RapidIO device connected to the mport.
The example below shows mport device subdirectory with several child RapidIO
-devices attached to it.
-
-[rio@rapidio ~]$ ls /sys/class/rapidio_port/rapidio0/ -l
-total 0
-drwxr-xr-x 3 root root 0 Feb 11 15:10 00:e:0001
-drwxr-xr-x 3 root root 0 Feb 11 15:10 00:e:0004
-drwxr-xr-x 3 root root 0 Feb 11 15:10 00:e:0007
-drwxr-xr-x 3 root root 0 Feb 11 15:10 00:s:0002
-drwxr-xr-x 3 root root 0 Feb 11 15:10 00:s:0003
-drwxr-xr-x 3 root root 0 Feb 11 15:10 00:s:0005
-lrwxrwxrwx 1 root root 0 Feb 11 15:11 device -> ../../../0000:01:00.0
--r--r--r-- 1 root root 4096 Feb 11 15:11 port_destid
-drwxr-xr-x 2 root root 0 Feb 11 15:11 power
-lrwxrwxrwx 1 root root 0 Feb 11 15:04 subsystem -> ../../../../../../class/rapidio_port
--r--r--r-- 1 root root 4096 Feb 11 15:11 sys_size
--rw-r--r-- 1 root root 4096 Feb 11 15:04 uevent
+devices attached to it::
+
+ [rio@rapidio ~]$ ls /sys/class/rapidio_port/rapidio0/ -l
+ total 0
+ drwxr-xr-x 3 root root 0 Feb 11 15:10 00:e:0001
+ drwxr-xr-x 3 root root 0 Feb 11 15:10 00:e:0004
+ drwxr-xr-x 3 root root 0 Feb 11 15:10 00:e:0007
+ drwxr-xr-x 3 root root 0 Feb 11 15:10 00:s:0002
+ drwxr-xr-x 3 root root 0 Feb 11 15:10 00:s:0003
+ drwxr-xr-x 3 root root 0 Feb 11 15:10 00:s:0005
+ lrwxrwxrwx 1 root root 0 Feb 11 15:11 device -> ../../../0000:01:00.0
+ -r--r--r-- 1 root root 4096 Feb 11 15:11 port_destid
+ drwxr-xr-x 2 root root 0 Feb 11 15:11 power
+ lrwxrwxrwx 1 root root 0 Feb 11 15:04 subsystem -> ../../../../../../class/rapidio_port
+ -r--r--r-- 1 root root 4096 Feb 11 15:11 sys_size
+ -rw-r--r-- 1 root root 4096 Feb 11 15:04 uevent
Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Description:
Reading this file returns a list of available protocols,
- something like:
+ something like::
+
"rc5 [rc6] nec jvc [sony]"
+
Enabled protocols are shown in [] brackets.
+
Writing "+proto" will add a protocol to the list of enabled
protocols.
+
Writing "-proto" will remove a protocol from the list of enabled
protocols.
+
Writing "proto" will enable only "proto".
+
Writing "none" will disable all protocols.
+
Write fails with EINVAL if an invalid protocol combination or
unknown protocol name is used.
Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Description:
Sets the scancode filter expected value.
+
Use in combination with /sys/class/rc/rcN/filter_mask to set the
expected value of the bits set in the filter mask.
If the hardware supports it then scancodes which do not match
the filter will be ignored. Otherwise the write will fail with
an error.
+
This value may be reset to 0 if the current protocol is altered.
What: /sys/class/rc/rcN/filter_mask
of the scancode which should be compared against the expected
value. A value of 0 disables the filter to allow all valid
scancodes to be processed.
+
If the hardware supports it then scancodes which do not match
the filter will be ignored. Otherwise the write will fail with
an error.
+
This value may be reset to 0 if the current protocol is altered.
What: /sys/class/rc/rcN/wakeup_protocols
Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Description:
Reading this file returns a list of available protocols to use
- for the wakeup filter, something like:
+ for the wakeup filter, something like::
+
"rc-5 nec nec-x rc-6-0 rc-6-6a-24 [rc-6-6a-32] rc-6-mce"
+
Note that protocol variants are listed, so "nec", "sony",
"rc-5", "rc-6" have their different bit length encodings
listed if available.
+
The enabled wakeup protocol is shown in [] brackets.
+
Only one protocol can be selected at a time.
+
Writing "proto" will use "proto" for wakeup events.
+
Writing "none" will disable wakeup.
+
Write fails with EINVAL if an invalid protocol combination or
unknown protocol name is used, or if wakeup is not supported by
the hardware.
Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Description:
Sets the scancode wakeup filter expected value.
+
Use in combination with /sys/class/rc/rcN/wakeup_filter_mask to
set the expected value of the bits set in the wakeup filter mask
to trigger a system wake event.
+
If the hardware supports it and wakeup_filter_mask is not 0 then
scancodes which match the filter will wake the system from e.g.
suspend to RAM or power off.
+
Otherwise the write will fail with an error.
+
This value may be reset to 0 if the wakeup protocol is altered.
What: /sys/class/rc/rcN/wakeup_filter_mask
Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Description:
Sets the scancode wakeup filter mask of bits to compare.
+
Use in combination with /sys/class/rc/rcN/wakeup_filter to set
the bits of the scancode which should be compared against the
expected value to trigger a system wake event.
+
If the hardware supports it and wakeup_filter_mask is not 0 then
scancodes which match the filter will wake the system from e.g.
suspend to RAM or power off.
+
Otherwise the write will fail with an error.
+
This value may be reset to 0 if the wakeup protocol is altered.
This will be one of the following strings:
- off
- on
- error
- fast
- normal
- idle
- standby
+ - off
+ - on
+ - error
+ - fast
+ - normal
+ - idle
+ - standby
"off" means the regulator is not supplying power to the
system.
This will be one of the following strings:
- 'voltage'
- 'current'
- 'unknown'
+ - 'voltage'
+ - 'current'
+ - 'unknown'
'voltage' means the regulator output voltage can be controlled
by software.
The opmode value can be one of the following strings:
- 'fast'
- 'normal'
- 'idle'
- 'standby'
- 'unknown'
+ - 'fast'
+ - 'normal'
+ - 'idle'
+ - 'standby'
+ - 'unknown'
The modes are described in include/linux/regulator/consumer.h
This will be one of the following strings:
- 'enabled'
- 'disabled'
- 'unknown'
+ - 'enabled'
+ - 'disabled'
+ - 'unknown'
'enabled' means the regulator is in bypass mode.
Reports the state of the remote processor, which will be one of:
- "offline"
- "suspended"
- "running"
- "crashed"
- "invalid"
+ - "offline"
+ - "suspended"
+ - "running"
+ - "crashed"
+ - "invalid"
"offline" means the remote processor is powered off.
Writing this file controls the state of the remote processor.
The following states can be written:
- "start"
- "stop"
+ - "start"
+ - "stop"
Writing "start" will attempt to start the processor running the
firmware indicated by, or written to,
Description: Provide information about RNBD-client.
All sysfs files that are not read-only provide the usage information on read:
- Example:
- # cat /sys/class/rnbd-client/ctl/map_device
+ Example::
- > Usage: echo "sessname=<name of the rtrs session> path=<[srcaddr,]dstaddr>
- > [path=<[srcaddr,]dstaddr>] device_path=<full path on remote side>
- > [access_mode=<ro|rw|migration>] > map_device
- >
- > addr ::= [ ip:<ipv4> | ip:<ipv6> | gid:<gid> ]
+ # cat /sys/class/rnbd-client/ctl/map_device
+
+ > Usage: echo "sessname=<name of the rtrs session> path=<[srcaddr,]dstaddr>
+ > [path=<[srcaddr,]dstaddr>] device_path=<full path on remote side>
+ > [access_mode=<ro|rw|migration>] > map_device
+ >
+ > addr ::= [ ip:<ipv4> | ip:<ipv6> | gid:<gid> ]
What: /sys/class/rnbd-client/ctl/map_device
Date: Feb 2020
KernelVersion: 5.7
Contact: Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
-Description: Expected format is the following:
+Description: Expected format is the following::
- sessname=<name of the rtrs session>
- path=<[srcaddr,]dstaddr> [path=<[srcaddr,]dstaddr> ...]
- device_path=<full path on remote side>
- [access_mode=<ro|rw|migration>]
+ sessname=<name of the rtrs session>
+ path=<[srcaddr,]dstaddr> [path=<[srcaddr,]dstaddr> ...]
+ device_path=<full path on remote side>
+ [access_mode=<ro|rw|migration>]
Where:
- sessname: accepts a string not bigger than 256 chars, which identifies
- a given session on the client and on the server.
- I.e. "clt_hostname-srv_hostname" could be a natural choice.
+ sessname:
+ accepts a string not bigger than 256 chars, which identifies
+ a given session on the client and on the server.
+ I.e. "clt_hostname-srv_hostname" could be a natural choice.
+
+ path:
+ describes a connection between the client and the server by
+ specifying destination and, when required, the source address.
+ The addresses are to be provided in the following format::
- path: describes a connection between the client and the server by
- specifying destination and, when required, the source address.
- The addresses are to be provided in the following format:
+ ip:<IPv6>
+ ip:<IPv4>
+ gid:<GID>
- ip:<IPv6>
- ip:<IPv4>
- gid:<GID>
+ for example::
- for example:
+ path=ip:10.0.0.66
- path=ip:10.0.0.66
The single addr is treated as the destination.
The connection will be established to this server from any client IP address.
- path=ip:10.0.0.66,ip:10.0.1.66
+ ::
+
+ path=ip:10.0.0.66,ip:10.0.1.66
+
First addr is the source address and the second is the destination.
If multiple "path=" options are specified multiple connection
will be established and data will be sent according to
the selected multipath policy (see RTRS mp_policy sysfs entry description).
- device_path: Path to the block device on the server side. Path is specified
- relative to the directory on server side configured in the
- 'dev_search_path' module parameter of the rnbd_server.
- The rnbd_server prepends the <device_path> received from client
- with <dev_search_path> and tries to open the
- <dev_search_path>/<device_path> block device. On success,
- a /dev/rnbd<N> device file, a /sys/block/rnbd_client/rnbd<N>/
- directory and an entry in /sys/class/rnbd-client/ctl/devices
- will be created.
+ device_path:
+ Path to the block device on the server side. Path is specified
+ relative to the directory on server side configured in the
+ 'dev_search_path' module parameter of the rnbd_server.
+ The rnbd_server prepends the <device_path> received from client
+ with <dev_search_path> and tries to open the
+ <dev_search_path>/<device_path> block device. On success,
+ a /dev/rnbd<N> device file, a /sys/block/rnbd_client/rnbd<N>/
+ directory and an entry in /sys/class/rnbd-client/ctl/devices
+ will be created.
If 'dev_search_path' contains '%SESSNAME%', then each session can
have different devices namespace, e.g. server was configured with
client has this string "sessname=blya device_path=sda", then server
will try to open: /run/rnbd-devs/blya/sda.
- access_mode: the access_mode parameter specifies if the device is to be
- mapped as "ro" read-only or "rw" read-write. The server allows
- a device to be exported in rw mode only once. The "migration"
- access mode has to be specified if a second mapping in read-write
- mode is desired.
+ access_mode:
+ the access_mode parameter specifies if the device is to be
+ mapped as "ro" read-only or "rw" read-write. The server allows
+ a device to be exported in rw mode only once. The "migration"
+ access mode has to be specified if a second mapping in read-write
+ mode is desired.
By default "rw" is used.
is the same as the device name. By extracting the last part of the
path the path to the device /dev/<dev-name> can be build.
- o /dev/block/$(cat /sys/class/rnbd-client/ctl/devices/<device_id>/dev)
+ * /dev/block/$(cat /sys/class/rnbd-client/ctl/devices/<device_id>/dev)
How to find the <device_id> of the device is described on the next
section.
The <device_id> of each device is created as follows:
- If the 'device_path' provided during mapping contains slashes ("/"),
- they are replaced by exclamation mark ("!") and used as as the
- <device_id>. Otherwise, the <device_id> will be the same as the
- "device_path" provided.
+ they are replaced by exclamation mark ("!") and used as as the
+ <device_id>. Otherwise, the <device_id> will be the same as the
+ "device_path" provided.
calibrate the AB8500.s 32KHz Real Time Clock.
Every 60 seconds the AB8500 will correct the RTC's value
by adding to it the value of this attribute.
+
The range of the attribute is -127 to +127 in units of
30.5 micro-seconds (half-parts-per-million of the 32KHz clock)
Users: The /vendor/st-ericsson/base_utilities/core/rtc_calibration
KernelVersion: 5.7
Contact: Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
Description: RW, adds a new path (connection) to an existing session. Expected format is the
- following:
+ following::
- <[source addr,]destination addr>
- *addr ::= [ ip:<ipv4|ipv6> | gid:<gid> ]
+ <[source addr,]destination addr>
+ *addr ::= [ ip:<ipv4|ipv6> | gid:<gid> ]
What: /sys/class/rtrs-client/<session-name>/max_reconnect_attempts
Date: Feb 2020
Description: Multipath policy specifies which path should be selected on each IO:
round-robin (0):
- select path in per CPU round-robin manner.
+ select path in per CPU round-robin manner.
min-inflight (1):
- select path with minimum inflights.
+ select path with minimum inflights.
What: /sys/class/rtrs-client/<session-name>/paths/
Date: Feb 2020
not the case, the processing of an I/O response could be processed on a
different CPU than where it was originally submitted. This file shows
how many interrupts where generated on a non expected CPU.
- "from:" is the CPU on which the IRQ was expected, but not generated.
- "to:" is the CPU on which the IRQ was generated, but not expected.
+
+ "from:"
+ is the CPU on which the IRQ was expected, but not generated.
+ "to:"
+ is the CPU on which the IRQ was generated, but not expected.
What: /sys/class/rtrs-client/<session-name>/paths/<src@dst>/stats/reconnects
Date: Feb 2020
KernelVersion: 5.7
Contact: Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
Description: Contains statistics regarding rdma operations and inflight operations.
- The output consists of 6 values:
+ The output consists of 6 values::
- <read-count> <read-total-size> <write-count> <write-total-size> \
- <inflights> <failovered>
+ <read-count> <read-total-size> <write-count> \
+ <write-total-size> <inflights> <failovered>
management) on top, which makes it match the Windows IRST (Intel
Rapid Storage Technology) driver settings. This setting is also
close to min_power, except that:
+
a) It does not use host-initiated slumber mode, but it does
- allow device-initiated slumber
+ allow device-initiated slumber
b) It does not enable low power device sleep mode (DevSlp).
What: /sys/class/scsi_host/hostX/em_message
protocol, writes and reads correspond to the LED message format
as defined in the AHCI spec.
- The user must turn sw_activity (under /sys/block/*/device/) OFF
- it they wish to control the activity LED via the em_message
+ The user must turn sw_activity (under `/sys/block/*/device/`)
+ OFF it they wish to control the activity LED via the em_message
file.
em_message_type: (RO) Displays the current enclosure management
attribute will not return until the operation has finished.
Valid values:
- - source (The port will behave as source only DFP port)
- - sink (The port will behave as sink only UFP port)
- - dual (The port will behave as dual-role-data and
+
+ ====== ==============================================
+ source (The port will behave as source only DFP port)
+ sink (The port will behave as sink only UFP port)
+ dual (The port will behave as dual-role-data and
dual-role-power port)
+ ====== ==============================================
What: /sys/class/typec/<port>/vconn_source
Date: April 2017
generates uevent KOBJ_CHANGE.
Valid values:
+
- "no" when the port is not the VCONN Source
- "yes" when the port is the VCONN Source
power operation mode should show "usb_power_delivery".
Valid values:
+
- default
- 1.5A
- 3.0A
Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Description:
Shows type of the plug on the cable:
+
- type-a - Standard A
- type-b - Standard B
- type-c
<channel> <type> [<bpst offset>]
to start (or stop) scanning on a channel. <type> is one of:
- 0 - scan
- 1 - scan outside BP
- 2 - scan while inactive
- 3 - scanning disabled
- 4 - scan (with start time of <bpst offset>)
+
+ == =======================================
+ 0 scan
+ 1 scan outside BP
+ 2 scan while inactive
+ 3 scanning disabled
+ 4 scan (with start time of <bpst offset>)
+ == =======================================
What: /sys/class/uwb_rc/uwbN/mac_address
Date: July 2008
h/w strapping (for WDT2 only).
At alternate flash the 'access_cs0' sysfs node provides:
- ast2400: a way to get access to the primary SPI flash
+
+ ast2400:
+ a way to get access to the primary SPI flash
chip at CS0 after booting from the alternate
chip at CS1.
- ast2500: a way to restore the normal address mapping
+ ast2500:
+ a way to restore the normal address mapping
from (CS0->CS1, CS1->CS0) to (CS0->CS0,
CS1->CS1).
the form "<major>:<minor>". These links point to the
corresponding sysfs path for the given device.
- Example:
- $ readlink /sys/dev/block/8:32
- ../../block/sdc
+ Example::
+
+ $ readlink /sys/dev/block/8:32
+ ../../block/sdc
Entries in /sys/dev/char and /sys/dev/block will be
dynamically created and destroyed as devices enter and
block.
For example, on 4-die Xeon platform with up to 6 IIO stacks per
die and, therefore, 6 IIO PMON blocks per die, the mapping of
- IIO PMON block 0 exposes as the following:
+ IIO PMON block 0 exposes as the following::
- $ ls /sys/devices/uncore_iio_0/die*
- -r--r--r-- /sys/devices/uncore_iio_0/die0
- -r--r--r-- /sys/devices/uncore_iio_0/die1
- -r--r--r-- /sys/devices/uncore_iio_0/die2
- -r--r--r-- /sys/devices/uncore_iio_0/die3
+ $ ls /sys/devices/uncore_iio_0/die*
+ -r--r--r-- /sys/devices/uncore_iio_0/die0
+ -r--r--r-- /sys/devices/uncore_iio_0/die1
+ -r--r--r-- /sys/devices/uncore_iio_0/die2
+ -r--r--r-- /sys/devices/uncore_iio_0/die3
- $ tail /sys/devices/uncore_iio_0/die*
- ==> /sys/devices/uncore_iio_0/die0 <==
- 0000:00
- ==> /sys/devices/uncore_iio_0/die1 <==
- 0000:40
- ==> /sys/devices/uncore_iio_0/die2 <==
- 0000:80
- ==> /sys/devices/uncore_iio_0/die3 <==
- 0000:c0
+ $ tail /sys/devices/uncore_iio_0/die*
+ ==> /sys/devices/uncore_iio_0/die0 <==
+ 0000:00
+ ==> /sys/devices/uncore_iio_0/die1 <==
+ 0000:40
+ ==> /sys/devices/uncore_iio_0/die2 <==
+ 0000:80
+ ==> /sys/devices/uncore_iio_0/die3 <==
+ 0000:c0
- Which means:
- IIO PMU 0 on die 0 belongs to PCI RP on bus 0x00, domain 0x0000
- IIO PMU 0 on die 1 belongs to PCI RP on bus 0x40, domain 0x0000
- IIO PMU 0 on die 2 belongs to PCI RP on bus 0x80, domain 0x0000
- IIO PMU 0 on die 3 belongs to PCI RP on bus 0xc0, domain 0x0000
+ Which means::
+
+ IIO PMU 0 on die 0 belongs to PCI RP on bus 0x00, domain 0x0000
+ IIO PMU 0 on die 1 belongs to PCI RP on bus 0x40, domain 0x0000
+ IIO PMU 0 on die 2 belongs to PCI RP on bus 0x80, domain 0x0000
+ IIO PMU 0 on die 3 belongs to PCI RP on bus 0xc0, domain 0x0000
online/offline state of the memory section. When written,
root can toggle the the online/offline state of a removable
memory section (see removable file description above)
- using the following commands.
- # echo online > /sys/devices/system/memory/memoryX/state
- # echo offline > /sys/devices/system/memory/memoryX/state
+ using the following commands::
+
+ # echo online > /sys/devices/system/memory/memoryX/state
+ # echo offline > /sys/devices/system/memory/memoryX/state
For example, if /sys/devices/system/memory/memory22/removable
contains a value of 1 and
/sys/devices/system/memory/memory22/state contains the
string "online" the following command can be executed by
- by root to offline that section.
- # echo offline > /sys/devices/system/memory/memory22/state
+ by root to offline that section::
+
+ # echo offline > /sys/devices/system/memory/memory22/state
+
Users: hotplug memory remove tools
http://www.ibm.com/developerworks/wikis/display/LinuxP/powerpc-utils
For example, the following symbolic link is created for
memory section 9 on node0:
+
/sys/devices/system/memory/memory9/node0 -> ../../node/node0
points to the corresponding /sys/devices/system/memory/memoryY
memory section directory. For example, the following symbolic
link is created for memory section 9 on node0.
+
/sys/devices/system/node/node0/memory9 -> ../../memory/memory9
(RO) Hexadecimal bitmask of the TAD attributes are reported by
the platform firmware (see ACPI 6.2, section 9.18.2):
+ ======= ======================================================
BIT(0): AC wakeup implemented if set
BIT(1): DC wakeup implemented if set
BIT(2): Get/set real time features implemented if set
BIT(6): The AC timer wakes up from S5 if set
BIT(7): The DC timer wakes up from S4 if set
BIT(8): The DC timer wakes up from S5 if set
+ ======= ======================================================
The other bits are reserved.
timer status with the following meaning of bits (see ACPI 6.2,
Section 9.18.5):
+ ======= ======================================================
Bit(0): The timer has expired if set.
Bit(1): The timer has woken up the system from a sleep state
(S3 or S4/S5 if supported) if set.
+ ======= ======================================================
The other bits are reserved.
Contact: Fabien Chouteau <fabien.chouteau@barco.com>
Description:
Show the suspend state of an USB composite gadget.
- 1 -> suspended
- 0 -> resumed
+
+ - 1 -> suspended
+ - 0 -> resumed
(_UDC_ is the name of the USB Device Controller driver)
Storage mode.
Possible values are:
- 1 -> ignore the FUA flag
- 0 -> obey the FUA flag
+
+ - 1 -> ignore the FUA flag
+ - 0 -> obey the FUA flag
The protection has information embedded whether it blocks reads,
writes or both.
The result is:
- 0 -> the DPS is not keylocked
- 1 -> the DPS is keylocked
+
+ - 0 -> the DPS is not keylocked
+ - 1 -> the DPS is keylocked
+
Users: None identified so far.
What: /sys/devices/platform/docg3/f[0-3]_dps[01]_protection_key
Entering the correct value toggle the lock, and can be observed
through f[0-3]_dps[01]_is_keylocked.
Possible values are:
+
- 8 bytes
+
Typical values are:
+
- "00000000"
- "12345678"
+
Users: None identified so far.
Contact: openipmi-developer@lists.sourceforge.net
Description:
- idles: (RO) Number of times the interface was
+ ====================== ========================================
+ idles (RO) Number of times the interface was
idle while being polled.
- watchdog_pretimeouts: (RO) Number of watchdog pretimeouts.
+ watchdog_pretimeouts (RO) Number of watchdog pretimeouts.
- complete_transactions: (RO) Number of completed messages.
+ complete_transactions (RO) Number of completed messages.
- events: (RO) Number of IPMI events received from
+ events (RO) Number of IPMI events received from
the hardware.
- interrupts: (RO) Number of interrupts the driver
+ interrupts (RO) Number of interrupts the driver
handled.
- hosed_count: (RO) Number of times the hardware didn't
+ hosed_count (RO) Number of times the hardware didn't
follow the state machine.
- long_timeouts: (RO) Number of times the driver
+ long_timeouts (RO) Number of times the driver
requested a timer while nothing was in
progress.
- flag_fetches: (RO) Number of times the driver
+ flag_fetches (RO) Number of times the driver
requested flags from the hardware.
- attentions: (RO) Number of time the driver got an
+ attentions (RO) Number of time the driver got an
ATTN from the hardware.
- incoming_messages: (RO) Number of asynchronous messages
+ incoming_messages (RO) Number of asynchronous messages
received.
- short_timeouts: (RO) Number of times the driver
+ short_timeouts (RO) Number of times the driver
requested a timer while an operation was
in progress.
+ ====================== ========================================
What: /sys/devices/platform/ipmi_si.*/interrupts_enabled
KernelVersion: v4.15
Contact: openipmi-developer@lists.sourceforge.net
Description:
- hosed: (RO) Number of times the hardware didn't
+ ====================== ========================================
+ hosed (RO) Number of times the hardware didn't
follow the state machine.
- alerts: (RO) Number of alerts received.
+ alerts (RO) Number of alerts received.
- sent_messages: (RO) Number of total messages sent.
+ sent_messages (RO) Number of total messages sent.
- sent_message_parts: (RO) Number of message parts sent.
+ sent_message_parts (RO) Number of message parts sent.
Messages may be broken into parts if
they are long.
- received_messages: (RO) Number of message responses
+ received_messages (RO) Number of message responses
received.
- received_message_parts: (RO) Number of message fragments
+ received_message_parts (RO) Number of message fragments
received.
- events: (RO) Number of received events.
+ events (RO) Number of received events.
- watchdog_pretimeouts: (RO) Number of watchdog pretimeouts.
+ watchdog_pretimeouts (RO) Number of watchdog pretimeouts.
- flag_fetches: (RO) Number of times a flag fetch was
+ flag_fetches (RO) Number of times a flag fetch was
requested.
- send_retries: (RO) Number of time a message was
+ send_retries (RO) Number of time a message was
retried.
- receive_retries: (RO) Number of times the receive of a
+ receive_retries (RO) Number of times the receive of a
message was retried.
- send_errors: (RO) Number of times the send of a
+ send_errors (RO) Number of times the send of a
message failed.
- receive_errors: (RO) Number of errors in receiving
+ receive_errors (RO) Number of errors in receiving
messages.
+ ====================== ========================================
to overlay planes.
Selects the composition mode for the overlay. Possible values
- are
+ are:
- 0 - Alpha Blending
- 1 - ROP3
+ - 0 - Alpha Blending
+ - 1 - ROP3
What: /sys/devices/platform/sh_mobile_lcdc_fb.[0-3]/graphics/fb[0-9]/ovl_position
Date: May 2012
to overlay planes.
Stores the x,y overlay position on the display in pixels. The
- position format is `[0-9]+,[0-9]+'.
+ position format is `[0-9]+,[0-9]+`.
What: /sys/devices/platform/sh_mobile_lcdc_fb.[0-3]/graphics/fb[0-9]/ovl_rop3
Date: May 2012
b[15:0]
inform firmware the current software execution
stage.
+
+ == ===========================================
0 the first stage bootloader didn't run or
didn't reach the point of launching second
stage bootloader.
2 both first and second stage bootloader ran
and the operating system launch was
attempted.
+ == ===========================================
b[16]
+ == ===========================================
1 firmware to reset current image retry
counter.
0 no action.
+ == ===========================================
b[17]
+ == ===========================================
1 firmware to clear RSU log
0 no action.
+ == ===========================================
b[18]
this is negative logic
+
+ == ===========================================
1 no action
0 firmware record the notify code defined
in b[15:0].
+ == ===========================================
What: /sys/devices/platform/stratix10-rsu.0/dcmf0
Date: June 2020
The processor idle states which are available for use have the
following attributes:
- name: (RO) Name of the idle state (string).
+ ======== ==== =================================================
+ name: (RO) Name of the idle state (string).
latency: (RO) The latency to exit out of this idle state (in
- microseconds).
+ microseconds).
- power: (RO) The power consumed while in this idle state (in
- milliwatts).
+ power: (RO) The power consumed while in this idle state (in
+ milliwatts).
- time: (RO) The total time spent in this idle state (in microseconds).
+ time: (RO) The total time spent in this idle state
+ (in microseconds).
- usage: (RO) Number of times this state was entered (a count).
+ usage: (RO) Number of times this state was entered (a count).
- above: (RO) Number of times this state was entered, but the
- observed CPU idle duration was too short for it (a count).
+ above: (RO) Number of times this state was entered, but the
+ observed CPU idle duration was too short for it
+ (a count).
- below: (RO) Number of times this state was entered, but the
- observed CPU idle duration was too long for it (a count).
+ below: (RO) Number of times this state was entered, but the
+ observed CPU idle duration was too long for it
+ (a count).
+ ======== ==== =================================================
What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/desc
Date: February 2008
This switch controls the boost setting for the whole system.
Boosting allows the CPU and the firmware to run at a frequency
beyound it's nominal limit.
+
More details can be found in
Documentation/admin-guide/pm/cpufreq.rst
Description: Parameters for the CPU cache attributes
allocation_policy:
- - WriteAllocate: allocate a memory location to a cache line
- on a cache miss because of a write
- - ReadAllocate: allocate a memory location to a cache line
+ - WriteAllocate:
+ allocate a memory location to a cache line
+ on a cache miss because of a write
+ - ReadAllocate:
+ allocate a memory location to a cache line
on a cache miss because of a read
- - ReadWriteAllocate: both writeallocate and readallocate
+ - ReadWriteAllocate:
+ both writeallocate and readallocate
- attributes: LEGACY used only on IA64 and is same as write_policy
+ attributes:
+ LEGACY used only on IA64 and is same as write_policy
- coherency_line_size: the minimum amount of data in bytes that gets
+ coherency_line_size:
+ the minimum amount of data in bytes that gets
transferred from memory to cache
- level: the cache hierarchy in the multi-level cache configuration
+ level:
+ the cache hierarchy in the multi-level cache configuration
- number_of_sets: total number of sets in the cache, a set is a
+ number_of_sets:
+ total number of sets in the cache, a set is a
collection of cache lines with the same cache index
- physical_line_partition: number of physical cache line per cache tag
+ physical_line_partition:
+ number of physical cache line per cache tag
- shared_cpu_list: the list of logical cpus sharing the cache
+ shared_cpu_list:
+ the list of logical cpus sharing the cache
- shared_cpu_map: logical cpu mask containing the list of cpus sharing
+ shared_cpu_map:
+ logical cpu mask containing the list of cpus sharing
the cache
- size: the total cache size in kB
+ size:
+ the total cache size in kB
type:
- Instruction: cache that only holds instructions
- Data: cache that only caches data
- Unified: cache that holds both data and instructions
- ways_of_associativity: degree of freedom in placing a particular block
- of memory in the cache
+ ways_of_associativity:
+ degree of freedom in placing a particular block
+ of memory in the cache
write_policy:
- - WriteThrough: data is written to both the cache line
+ - WriteThrough:
+ data is written to both the cache line
and to the block in the lower-level memory
- - WriteBack: data is written only to the cache line and
+ - WriteBack:
+ data is written only to the cache line and
the modified cache line is written to main
memory only when it is replaced
throttle attributes exported in the 'throttle_stats' directory:
- turbo_stat : This file gives the total number of times the max
- frequency is throttled to lower frequency in turbo (at and above
- nominal frequency) range of frequencies.
+ frequency is throttled to lower frequency in turbo (at and above
+ nominal frequency) range of frequencies.
- sub_turbo_stat : This file gives the total number of times the
- max frequency is throttled to lower frequency in sub-turbo(below
- nominal frequency) range of frequencies.
+ max frequency is throttled to lower frequency in sub-turbo(below
+ nominal frequency) range of frequencies.
- unthrottle : This file gives the total number of times the max
- frequency is unthrottled after being throttled.
+ frequency is unthrottled after being throttled.
- powercap : This file gives the total number of times the max
- frequency is throttled due to 'Power Capping'.
+ frequency is throttled due to 'Power Capping'.
- overtemp : This file gives the total number of times the max
- frequency is throttled due to 'CPU Over Temperature'.
+ frequency is throttled due to 'CPU Over Temperature'.
- supply_fault : This file gives the total number of times the
- max frequency is throttled due to 'Power Supply Failure'.
+ max frequency is throttled due to 'Power Supply Failure'.
- overcurrent : This file gives the total number of times the
- max frequency is throttled due to 'Overcurrent'.
+ max frequency is throttled due to 'Overcurrent'.
- occ_reset : This file gives the total number of times the max
- frequency is throttled due to 'OCC Reset'.
+ frequency is throttled due to 'OCC Reset'.
The sysfs attributes representing different throttle reasons like
powercap, overtemp, supply_fault, overcurrent and occ_reset map to
Date: June 2016
Contact: Linux ARM Kernel Mailing list <linux-arm-kernel@lists.infradead.org>
Description: AArch64 CPU registers
+
'identification' directory exposes the CPU ID registers for
- identifying model and revision of the CPU.
+ identifying model and revision of the CPU.
What: /sys/devices/system/cpu/cpu#/cpu_capacity
Date: December 2016
vulnerabilities. The output of those files reflects the
state of the CPUs in the system. Possible output values:
+ ================ ==============================================
"Not affected" CPU is not affected by the vulnerability
"Vulnerable" CPU is affected and no mitigation in effect
"Mitigation: $M" CPU is affected and mitigation $M is in effect
+ ================ ==============================================
See also: Documentation/admin-guide/hw-vuln/index.rst
control: Read/write interface to control SMT. Possible
values:
+ ================ =========================================
"on" SMT is enabled
"off" SMT is disabled
"forceoff" SMT is force disabled. Cannot be changed.
"notsupported" SMT is not supported by the CPU
"notimplemented" SMT runtime toggling is not
implemented for the architecture
+ ================ =========================================
If control status is "forceoff" or "notsupported" writes
are rejected.
Facility in POWER9 and newer processors. i.e., it is a Secure
Virtual Machine.
-What: /sys/devices/system/cpu/cpuX/purr
+What: /sys/devices/system/cpu/cpuX/purr
Date: Apr 2005
Contact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org>
Description: PURR ticks for this CPU since the system boot.
Description: The state file allows a means by which to change in and
out of Premium Real-Time Mode (PRTM), as well as the
ability to query the current state.
- 0 => PRTM off
- 1 => PRTM enabled
+
+ - 0 => PRTM off
+ - 1 => PRTM enabled
+
Users: The ibm-prtm userspace daemon uses this interface.
if DDR power rails will be kept powered during system suspend.
("on"/"1" = enabled, "off"/"0" = disabled).
Two types of power switches (or control signals) can be used:
+
A. With a momentary power switch (or pulse signal), DDR
Backup Mode is enabled by default when available, as the
PMIC will be configured only during system suspend.
B. With a toggle power switch (or level signal), the
following steps must be followed exactly:
+
1. Configure PMIC for backup mode, to change the role of
the accessory power switch from a power switch to a
wake-up switch,
3. Suspend system,
4. Switch accessory power switch on, to resume the
system.
+
DDR Backup Mode must be explicitly enabled by the user,
to invoke step 1.
+
See also Documentation/devicetree/bindings/mfd/bd9571mwv.txt.
Users: User space applications for embedded boards equipped with a
BD9571MWV PMIC.
Date: May 2014
Contact: klebers@linux.vnet.ibm.com
Description: Interface to trigger a PCIe card reset to reload the bitstream.
+
+ ::
+
sudo sh -c 'echo 1 > \
/sys/class/genwqe/genwqe0_card/reload_bitstream'
+
If successfully, the card will come back with the bitstream set
on 'next_bitstream'.
What: /sys/class/genwqe/genwqe<n>_card/device/sriov_numvfs
Date: Oct 2013
Contact: haver@linux.vnet.ibm.com
-Description: Enable VFs (1..15):
+Description: Enable VFs (1..15)::
+
sudo sh -c 'echo 15 > \
/sys/bus/pci/devices/0000\:1b\:00.0/sriov_numvfs'
- Disable VFs:
+
+ Disable VFs::
+
Write a 0 into the same sysfs entry.
Contact: linux-input@vger.kernel.org
Description: This controls if mouse clicks should be generated if the trackpoint is quickly pressed. How fast this press has to be
is being controlled by press_speed.
+
Values are 0 or 1.
+
Applies to Thinkpad USB Keyboard with TrackPoint.
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/dragging
Date: July 2011
Contact: linux-input@vger.kernel.org
Description: If this setting is enabled, it is possible to do dragging by pressing the trackpoint. This requires press_to_select to be enabled.
+
Values are 0 or 1.
+
Applies to Thinkpad USB Keyboard with TrackPoint.
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/release_to_select
Contact: linux-input@vger.kernel.org
Description: This setting controls if the mouse click events generated by pressing the trackpoint (if press_to_select is enabled) generate
a left or right mouse button click.
+
Values are 0 or 1.
+
Applies to Thinkpad USB Keyboard with TrackPoint.
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/sensitivity
Date: July 2011
Contact: linux-input@vger.kernel.org
Description: This setting controls how fast the trackpoint needs to be pressed to generate a mouse click if press_to_select is enabled.
+
Values are decimal integers from 1 (slowest) to 255 (fastest).
+
Applies to Thinkpad USB Keyboard with TrackPoint.
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/fn_lock
Date: July 2014
Contact: linux-input@vger.kernel.org
Description: This setting controls whether Fn Lock is enabled on the keyboard (i.e. if F1 is Mute or F1)
+
Values are 0 or 1
+
Applies to ThinkPad Compact (USB|Bluetooth) Keyboard with TrackPoint.
Contact: Michal Malý <madcatxster@devoid-pointer.net>
Description: Displays a set of alternate modes supported by a wheel. Each
mode is listed as follows:
+
Tag: Mode Name
+
Currently active mode is marked with an asterisk. List also
contains an abstract item "native" which always denotes the
native mode of the wheel. Echoing the mode tag switches the
This entry is not created for devices that have only one mode.
Currently supported mode switches:
- Driving Force Pro:
+
+ Driving Force Pro::
+
DF-EX --> DFP
- G25:
+ G25::
+
DF-EX --> DFP --> G25
- G27:
+ G27::
+
DF-EX <*> DFP <-> G25 <-> G27
DF-EX <*--------> G25 <-> G27
DF-EX <*----------------> G27
- G29:
+ G29::
+
DF-EX <*> DFP <-> G25 <-> G27 <-> G29
DF-EX <*--------> G25 <-> G27 <-> G29
DF-EX <*----------------> G27 <-> G29
DF-EX <*------------------------> G29
- DFGT:
+ DFGT::
+
DF-EX <*> DFP <-> DFGT
DF-EX <*--------> DFGT
Description:
Threholds to override activation slack.
- activation_width: (RW) Width threshold to immediately
+ ================= =====================================
+ activation_width (RW) Width threshold to immediately
start processing touch events.
- activation_height: (RW) Height threshold to immediately
+ activation_height (RW) Height threshold to immediately
start processing touch events.
-
+ ================= =====================================
What: /sys/bus/hid/drivers/ntrig/<dev>/min_width
What: /sys/bus/hid/drivers/ntrig/<dev>/min_height
Description:
Minimum size contact accepted.
- min_width: (RW) Minimum touch contact width to decide
+ ========== ===========================================
+ min_width (RW) Minimum touch contact width to decide
activation and activity.
- min_height: (RW) Minimum touch contact height to decide
+ min_height (RW) Minimum touch contact height to decide
activation and activity.
+ ========== ===========================================
What: /sys/bus/hid/drivers/ntrig/<dev>/sensor_physical_width
Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
Description: It is possible to switch the dpi setting of the mouse with the
press of a button.
+
When read, this file returns the raw number of the actual dpi
setting reported by the mouse. This number has to be further
processed to receive the real dpi value:
+ ===== =====
VALUE DPI
+ ===== =====
1 800
2 1200
3 1600
4 2000
5 2400
6 3200
+ ===== =====
This file is readonly.
Users: http://roccat.sourceforge.net
Date: March 2010
Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
Description: When read, this file returns the number of the actual profile.
+
This file is readonly.
Users: http://roccat.sourceforge.net
further usage in other programs. To receive the real version
number the decimal point has to be shifted 2 positions to the
left. E.g. a returned value of 138 means 1.38
+
This file is readonly.
Users: http://roccat.sourceforge.net
press of a button. A profile holds information like button
mappings, sensitivity, the colors of the 5 leds and light
effects.
+
When read, these files return the respective profile. The
returned data is 975 bytes in size.
+
When written, this file lets one write the respective profile
data back to the mouse. The data has to be 975 bytes long.
+
The mouse will reject invalid data, whereas the profile number
stored in the profile doesn't need to fit the number of the
store.
Description: When read, this file returns the settings stored in the mouse.
The size of the data is 36 bytes and holds information like the
startup_profile, tcu state and calibration_data.
+
When written, this file lets write settings back to the mouse.
The data has to be 36 bytes long. The mouse will reject invalid
data.
Date: March 2010
Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
Description: The integer value of this attribute ranges from 1 to 5.
+
When read, this attribute returns the number of the profile
that's active when the mouse is powered on.
+
When written, this file sets the number of the startup profile
and the mouse activates this profile immediately.
Users: http://roccat.sourceforge.net
calibrate the laser power to fit the mousepad surface.
When read, this file returns the current state of the TCU,
where 0 means off and 1 means on.
+
Writing 0 in this file will switch the TCU off.
+
Writing 1 in this file will start the calibration which takes
around 6 seconds to complete and activates the TCU.
+
Users: http://roccat.sourceforge.net
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/kone/roccatkone<minor>/weight
and its value can be read out. When read, this file returns the
raw value returned by the mouse which eases further processing
in other software.
+
The values map to the weights as follows:
+ ===== ======
VALUE WEIGHT
+ ===== ======
0 none
1 5g
2 10g
3 15g
4 20g
+ ===== ======
This file is readonly.
Users: http://roccat.sourceforge.net
the official Nintendo Nunchuck extension and classic is the
Nintendo Classic Controller extension. The motionp extension can
be combined with the other two.
+
Starting with kernel-version 3.11 Motion Plus hotplugging is
supported and if detected, it's no longer reported as static
extension. You will get uevent notifications for the motion-plus
Other strings for each device-type are available and may be
added if new device-specific detections are added.
Currently supported are:
- gen10: First Wii Remote generation
- gen20: Second Wii Remote Plus generation (builtin MP)
+
+ ============= =======================================
+ gen10: First Wii Remote generation
+ gen20: Second Wii Remote Plus generation
+ (builtin MP)
balanceboard: Wii Balance Board
+ ============= =======================================
What: /sys/bus/hid/drivers/wiimote/<dev>/bboard_calib
Date: May 2013
First, 0kg values for all 4 sensors are written, followed by the
17kg values for all 4 sensors and last the 34kg values for all 4
sensors.
+
Calibration data is already applied by the kernel to all input
values but may be used by user-space to perform other
transformations.
is prefixed with a +/-. Each value is a signed 16bit number.
Data is encoded as decimal numbers and specifies the offsets of
the analog sticks of the pro-controller.
+
Calibration data is already applied by the kernel to all input
values but may be used by user-space to perform other
transformations.
+
Calibration data is detected by the kernel during device setup.
You can write "scan\n" into this file to re-trigger calibration.
You can also write data directly in the form "x1:y1 x2:y2" to
Description: Reports the firmware version provided by the touchscreen, for example "00_T6" on a EXC80H60
Access: Read
+
Valid values: Represented as string
What: /sys/bus/i2c/devices/xxx/model
Description: Reports the model identification provided by the touchscreen, for example "Orion_1320" on a EXC80H60
Access: Read
+
Valid values: Represented as string
Description: read-only access to the efuse on the Ingenic JZ4780 SoC
The SoC has a one time programmable 8K efuse that is
split into segments. The driver supports read only.
- The segments are
+ The segments are:
+
+ ===== ======== =================
0x000 64 bit Random Number
0x008 128 bit Ingenic Chip ID
0x018 128 bit Customer ID
0x1E0 8 bit Protect Segment
0x1E1 2296 bit HDMI Key
0x300 2048 bit Security boot key
+ ===== ======== =================
+
Users: any user space application which wants to read the Chip
and Customer ID
the format of DDDD:BB:DD.F-REG:SIZE:MASK will allow the guest
to write and read from the PCI device. That is Domain:Bus:
Device.Function-Register:Size:Mask (Domain is optional).
- For example:
- #echo 00:19.0-E0:2:FF > /sys/bus/pci/drivers/pciback/quirks
+ For example::
+
+ #echo 00:19.0-E0:2:FF > /sys/bus/pci/drivers/pciback/quirks
+
will allow the guest to read and write to the configuration
register 0x0E.
their fans quiet at all costs. Reading from this file
will show the current performance level. Writing to the
file can change this value.
+
Valid options:
- "silent"
- "normal"
- "overclock"
+ - "silent"
+ - "normal"
+ - "overclock"
+
Note that not all laptops support all of these options.
Specifically, not all support the "overclock" option,
and it's still unknown if this value even changes
Description: Max battery charge level can be modified, battery cycle
life can be extended by reducing the max battery charge
level.
- 0 means normal battery mode (100% charge)
- 1 means battery life extender mode (80% charge)
+
+ - 0 means normal battery mode (100% charge)
+ - 1 means battery life extender mode (80% charge)
What: /sys/devices/platform/samsung/usb_charge
Date: December 1, 2011
Contact: Azael Avalos <coproscefalo@gmail.com>
Description: This file controls the keyboard backlight operation mode, valid
values are:
+
* 0x1 -> FN-Z
* 0x2 -> AUTO (also called TIMER)
* 0x8 -> ON
* 0x10 -> OFF
+
Note that from kernel 3.16 onwards this file accepts all listed
parameters, kernel 3.15 only accepts the first two (FN-Z and
AUTO).
Contact: Azael Avalos <coproscefalo@gmail.com>
Description: This files controls the status of the touchpad and pointing
stick (if available), valid values are:
+
* 0 -> OFF
* 1 -> ON
+
Users: KToshiba
What: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/TOS{1900,620{0,7,8}}:00/available_kbd_modes
Contact: Azael Avalos <coproscefalo@gmail.com>
Description: This file shows the supported keyboard backlight modes
the system supports, which can be:
+
* 0x1 -> FN-Z
* 0x2 -> AUTO (also called TIMER)
* 0x8 -> ON
* 0x10 -> OFF
+
Note that not all keyboard types support the listed modes.
See the entry named "available_kbd_modes"
Users: KToshiba
Contact: Azael Avalos <coproscefalo@gmail.com>
Description: This file shows the current keyboard backlight type,
which can be:
+
* 1 -> Type 1, supporting modes FN-Z and AUTO
* 2 -> Type 2, supporting modes TIMER, ON and OFF
Users: KToshiba
Contact: Azael Avalos <coproscefalo@gmail.com>
Description: This file controls the USB Sleep & Charge charging mode, which
can be:
+
* 0 -> Disabled (0x00)
* 1 -> Alternate (0x09)
* 2 -> Auto (0x21)
* 3 -> Typical (0x11)
+
Note that from kernel 4.1 onwards this file accepts all listed
values, kernel 4.0 only supports the first three.
Note that this feature only works when connected to power, if
Description: This file controls the USB Sleep Functions under battery, and
set the level at which point they will be disabled, accepted
values can be:
+
* 0 -> Disabled
* 1-100 -> Battery level to disable sleep functions
+
Currently it prints two values, the first one indicates if the
feature is enabled or disabled, while the second one shows the
current battery level set.
KernelVersion: 4.0
Contact: Azael Avalos <coproscefalo@gmail.com>
Description: This file controls the USB Rapid Charge state, which can be:
+
* 0 -> Disabled
* 1 -> Enabled
+
Note that toggling this value requires a reboot for changes to
take effect.
Users: KToshiba
KernelVersion: 4.0
Contact: Azael Avalos <coproscefalo@gmail.com>
Description: This file controls the Sleep & Music state, which values can be:
+
* 0 -> Disabled
* 1 -> Enabled
+
Note that this feature only works when connected to power, if
you want to use it under battery, see the entry named
"sleep_functions_on_battery"
Contact: Azael Avalos <coproscefalo@gmail.com>
Description: This file controls the state of the internal fan, valid
values are:
+
* 0 -> OFF
* 1 -> ON
Contact: Azael Avalos <coproscefalo@gmail.com>
Description: This file controls the Special Functions (hotkeys) operation
mode, valid values are:
+
* 0 -> Normal Operation
* 1 -> Special Functions
+
In the "Normal Operation" mode, the F{1-12} keys are as usual
and the hotkeys are accessed via FN-F{1-12}.
In the "Special Functions" mode, the F{1-12} keys trigger the
Contact: Azael Avalos <coproscefalo@gmail.com>
Description: This file controls whether the laptop should turn ON whenever
the LID is opened, valid values are:
+
* 0 -> Disabled
* 1 -> Enabled
+
Note that toggling this value requires a reboot for changes to
take effect.
Users: KToshiba
KernelVersion: 4.0
Contact: Azael Avalos <coproscefalo@gmail.com>
Description: This file controls the USB 3 functionality, valid values are:
+
* 0 -> Disabled (Acts as a regular USB 2)
* 1 -> Enabled (Full USB 3 functionality)
+
Note that toggling this value requires a reboot for changes to
take effect.
Users: KToshiba
Reading this file prints two values, the first is the actual cooling method
and the second is the maximum cooling method supported.
When the maximum cooling method is ONE, valid values are:
+
* 0 -> Maximum Performance
* 1 -> Battery Optimized
+
When the maximum cooling method is TWO, valid values are:
+
* 0 -> Maximum Performance
* 1 -> Performance
* 2 -> Battery Optimized
+
Users: KToshiba
Contact: Azael Avalos <coproscefalo@gmail.com>
Description: This file controls the built-in accelerometer protection level,
valid values are:
+
* 0 -> Disabled
* 1 -> Low
* 2 -> Medium
* 3 -> High
+
The default potection value is set to 2 (Medium).
Users: KToshiba
Description: This file shows the device type. This is one of the UFS
device descriptor parameters. The full information about
the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_class
Description: This file shows the device class. This is one of the UFS
device descriptor parameters. The full information about
the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_sub_class
Description: This file shows the UFS storage subclass. This is one of
the UFS device descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/protocol
This is one of the UFS device descriptor parameters.
The full information about the descriptor could be found
at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/number_of_luns
Description: This file shows number of logical units. This is one of
the UFS device descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/number_of_wluns
This is one of the UFS device descriptor parameters.
The full information about the descriptor could be found
at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/boot_enable
enabled for boot. This is one of the UFS device descriptor
parameters. The full information about the descriptor could
be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/descriptor_access_enable
of the boot sequence. This is one of the UFS device descriptor
parameters. The full information about the descriptor could
be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/initial_power_mode
device initialization or hardware reset. This is one of
the UFS device descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/high_priority_lun
Description: This file shows the high priority lun. This is one of
the UFS device descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/secure_removal_type
Description: This file shows the secure removal type. This is one of
the UFS device descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/support_security_lun
This is one of the UFS device descriptor parameters.
The full information about the descriptor could be found
at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/bkops_termination_latency
latency. This is one of the UFS device descriptor parameters.
The full information about the descriptor could be found
at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/initial_active_icc_level
Description: This file shows the initial active ICC level. This is one
of the UFS device descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/specification_version
Description: This file shows the specification version. This is one
of the UFS device descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/manufacturing_date
This is one of the UFS device descriptor parameters.
The full information about the descriptor could be found
at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/manufacturer_id
Description: This file shows the manufacturee ID. This is one of the
UFS device descriptor parameters. The full information about
the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/rtt_capability
supported by the device. This is one of the UFS device
descriptor parameters. The full information about
the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/rtc_update
clock update. This is one of the UFS device descriptor
parameters. The full information about the descriptor
could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/ufs_features
This is one of the UFS device descriptor parameters.
The full information about the descriptor could be
found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/ffu_timeout
Description: This file shows the FFU timeout. This is one of the
UFS device descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/queue_depth
Description: This file shows the device queue depth. This is one of the
UFS device descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_version
Description: This file shows the device version. This is one of the
UFS device descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/number_of_secure_wpa
supported by the device. This is one of the UFS device
descriptor parameters. The full information about
the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/psa_max_data_size
This is one of the UFS device descriptor parameters.
The full information about the descriptor could be found
at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/psa_state_timeout
in PSA state. This is one of the UFS device descriptor
parameters. The full information about the descriptor could
be found at UFS specifications 2.1.
+
The file is read only.
This is one of the UFS interconnect descriptor parameters.
The full information about the descriptor could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/interconnect_descriptor/mphy_version
This is one of the UFS interconnect descriptor parameters.
The full information about the descriptor could be found at
UFS specifications 2.1.
+
The file is read only.
of the UFS geometry descriptor parameters. The full
information about the descriptor could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/max_number_of_luns
supported by the UFS device. This is one of the UFS
geometry descriptor parameters. The full information about
the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/segment_size
Description: This file shows the segment size. This is one of the UFS
geometry descriptor parameters. The full information about
the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/allocation_unit_size
Description: This file shows the allocation unit size. This is one of
the UFS geometry descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/min_addressable_block_size
is one of the UFS geometry descriptor parameters. The full
information about the descriptor could be found at UFS
specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/optimal_read_block_size
of the UFS geometry descriptor parameters. The full
information about the descriptor could be found at UFS
specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/optimal_write_block_size
of the UFS geometry descriptor parameters. The full
information about the descriptor could be found at UFS
specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/max_in_buffer_size
is one of the UFS geometry descriptor parameters. The full
information about the descriptor could be found at UFS
specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/max_out_buffer_size
is one of the UFS geometry descriptor parameters. The full
information about the descriptor could be found at UFS
specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/rpmb_rw_size
in Security Protocol In/Out. This is one of the UFS geometry
descriptor parameters. The full information about the
descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/dyn_capacity_resource_policy
is one of the UFS geometry descriptor parameters. The full
information about the descriptor could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/data_ordering
This is one of the UFS geometry descriptor parameters.
The full information about the descriptor could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/max_number_of_contexts
are supported by the device. This is one of the UFS geometry
descriptor parameters. The full information about the
descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/sys_data_tag_unit_size
Description: This file shows system data tag unit size. This is one of
the UFS geometry descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/sys_data_tag_resource_size
This is one of the UFS geometry descriptor parameters.
The full information about the descriptor could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/secure_removal_types
one of the UFS geometry descriptor parameters. The full
information about the descriptor could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/memory_types
the UFS geometry descriptor parameters. The full
information about the descriptor could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/*_memory_max_alloc_units
enhanced type 1-4). This is one of the UFS geometry
descriptor parameters. The full information about the
descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/*_memory_capacity_adjustment_factor
enhanced type 1-4). This is one of the UFS geometry
descriptor parameters. The full information about the
descriptor could be found at UFS specifications 2.1.
+
The file is read only.
of the UFS health descriptor parameters. The full
information about the descriptor could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/health_descriptor/life_time_estimation_a
(method a). This is one of the UFS health descriptor
parameters. The full information about the descriptor
could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/health_descriptor/life_time_estimation_b
(method b). This is one of the UFS health descriptor
parameters. The full information about the descriptor
could be found at UFS specifications 2.1.
+
The file is read only.
active ICC levels from 0 to 15. This is one of the UFS
power descriptor parameters. The full information about
the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
Description: This file contains a device manufactureer name string.
The full information about the descriptor could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/product_name
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file contains a product name string. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/oem_id
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file contains a OEM ID string. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/serial_number
Description: This file contains a device serial number string. The full
information about the descriptor could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/product_revision
Description: This file contains a product revision string. The full
information about the descriptor could be found at
UFS specifications 2.1.
+
The file is read only.
Description: This file shows boot LUN information. This is one of
the UFS unit descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/class/scsi_device/*/device/unit_descriptor/lun_write_protect
Description: This file shows LUN write protection status. This is one of
the UFS unit descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/class/scsi_device/*/device/unit_descriptor/lun_queue_depth
Description: This file shows LUN queue depth. This is one of the UFS
unit descriptor parameters. The full information about
the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/class/scsi_device/*/device/unit_descriptor/psa_sensitive
Description: This file shows PSA sensitivity. This is one of the UFS
unit descriptor parameters. The full information about
the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/class/scsi_device/*/device/unit_descriptor/lun_memory_type
Description: This file shows LUN memory type. This is one of the UFS
unit descriptor parameters. The full information about
the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/class/scsi_device/*/device/unit_descriptor/data_reliability
occurs during a write operation. This is one of the UFS
unit descriptor parameters. The full information about
the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/class/scsi_device/*/device/unit_descriptor/logical_block_size
(calculated as an exponent with base 2). This is one of
the UFS unit descriptor parameters. The full information about
the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/class/scsi_device/*/device/unit_descriptor/logical_block_count
This is one of the UFS unit descriptor parameters. The full
information about the descriptor could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/class/scsi_device/*/device/unit_descriptor/erase_block_size
Description: This file shows the erase block size. This is one of
the UFS unit descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/class/scsi_device/*/device/unit_descriptor/provisioning_type
Description: This file shows the thin provisioning type. This is one of
the UFS unit descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/class/scsi_device/*/device/unit_descriptor/physical_memory_resourse_count
Description: This file shows the total physical memory resources. This is
one of the UFS unit descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/class/scsi_device/*/device/unit_descriptor/context_capabilities
Description: This file shows the context capabilities. This is one of
the UFS unit descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/class/scsi_device/*/device/unit_descriptor/large_unit_granularity
Description: This file shows the granularity of the LUN. This is one of
the UFS unit descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
+
The file is read only.
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the device init status. The full information
about the flag could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/permanent_wpe
Description: This file shows whether permanent write protection is enabled.
The full information about the flag could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/power_on_wpe
logical units configured as power on write protected. The
full information about the flag could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/bkops_enable
Description: This file shows whether the device background operations are
enabled. The full information about the flag could be
found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/life_span_mode_enable
Description: This file shows whether the device life span mode is enabled.
The full information about the flag could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/phy_resource_removal
Description: This file shows whether physical resource removal is enable.
The full information about the flag could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/busy_rtc
Description: This file shows whether the device is executing internal
operation related to real time clock. The full information
about the flag could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/disable_fw_update
Description: This file shows whether the device FW update is permanently
disabled. The full information about the flag could be found
at UFS specifications 2.1.
+
The file is read only.
Description: This file provides the boot lun enabled UFS device attribute.
The full information about the attribute could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/current_power_mode
Description: This file provides the current power mode UFS device attribute.
The full information about the attribute could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/active_icc_level
Description: This file provides the active icc level UFS device attribute.
The full information about the attribute could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/ooo_data_enabled
Description: This file provides the out of order data transfer enabled UFS
device attribute. The full information about the attribute
could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/bkops_status
Description: This file provides the background operations status UFS device
attribute. The full information about the attribute could
be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/purge_status
Description: This file provides the purge operation status UFS device
attribute. The full information about the attribute could
be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/max_data_in_size
Description: This file shows the maximum data size in a DATA IN
UPIU. The full information about the attribute could
be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/max_data_out_size
Description: This file shows the maximum number of bytes that can be
requested with a READY TO TRANSFER UPIU. The full information
about the attribute could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/reference_clock_frequency
Description: This file provides the reference clock frequency UFS device
attribute. The full information about the attribute could
be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/configuration_descriptor_lock
outstanding RTTs in device that is allowed. The full
information about the attribute could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/exception_event_control
Description: This file provides the exception event control UFS device
attribute. The full information about the attribute could
be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/exception_event_status
Description: This file provides the exception event status UFS device
attribute. The full information about the attribute could
be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/ffu_status
Description: This file provides the ffu status UFS device attribute.
The full information about the attribute could be found at
UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/psa_state
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file show the PSA feature status. The full information
about the attribute could be found at UFS specifications 2.1.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/psa_data_size
load to all logical units in pre-soldering state.
The full information about the attribute could be found at
UFS specifications 2.1.
+
The file is read only.
to be removed from the physical memory resources pool of
the particular logical unit. The full information about
the attribute could be found at UFS specifications 2.1.
+
The file is read only.
Description: This entry could be used to set or show the UFS device
runtime power management level. The current driver
implementation supports 6 levels with next target states:
- 0 - an UFS device will stay active, an UIC link will
- stay active
- 1 - an UFS device will stay active, an UIC link will
- hibernate
- 2 - an UFS device will moved to sleep, an UIC link will
- stay active
- 3 - an UFS device will moved to sleep, an UIC link will
- hibernate
- 4 - an UFS device will be powered off, an UIC link will
- hibernate
- 5 - an UFS device will be powered off, an UIC link will
- be powered off
+
+ == ====================================================
+ 0 an UFS device will stay active, an UIC link will
+ stay active
+ 1 an UFS device will stay active, an UIC link will
+ hibernate
+ 2 an UFS device will moved to sleep, an UIC link will
+ stay active
+ 3 an UFS device will moved to sleep, an UIC link will
+ hibernate
+ 4 an UFS device will be powered off, an UIC link will
+ hibernate
+ 5 an UFS device will be powered off, an UIC link will
+ be powered off
+ == ====================================================
What: /sys/bus/platform/drivers/ufshcd/*/rpm_target_dev_state
Date: February 2018
Contact: Subhash Jadavani <subhashj@codeaurora.org>
Description: This entry shows the target power mode of an UFS device
for the chosen runtime power management level.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/rpm_target_link_state
Contact: Subhash Jadavani <subhashj@codeaurora.org>
Description: This entry shows the target state of an UFS UIC link
for the chosen runtime power management level.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/spm_lvl
Description: This entry could be used to set or show the UFS device
system power management level. The current driver
implementation supports 6 levels with next target states:
- 0 - an UFS device will stay active, an UIC link will
- stay active
- 1 - an UFS device will stay active, an UIC link will
- hibernate
- 2 - an UFS device will moved to sleep, an UIC link will
- stay active
- 3 - an UFS device will moved to sleep, an UIC link will
- hibernate
- 4 - an UFS device will be powered off, an UIC link will
- hibernate
- 5 - an UFS device will be powered off, an UIC link will
- be powered off
+
+ == ====================================================
+ 0 an UFS device will stay active, an UIC link will
+ stay active
+ 1 an UFS device will stay active, an UIC link will
+ hibernate
+ 2 an UFS device will moved to sleep, an UIC link will
+ stay active
+ 3 an UFS device will moved to sleep, an UIC link will
+ hibernate
+ 4 an UFS device will be powered off, an UIC link will
+ hibernate
+ 5 an UFS device will be powered off, an UIC link will
+ be powered off
+ == ====================================================
What: /sys/bus/platform/drivers/ufshcd/*/spm_target_dev_state
Date: February 2018
Contact: Subhash Jadavani <subhashj@codeaurora.org>
Description: This entry shows the target power mode of an UFS device
for the chosen system power management level.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/spm_target_link_state
Contact: Subhash Jadavani <subhashj@codeaurora.org>
Description: This entry shows the target state of an UFS UIC link
for the chosen system power management level.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_presv_us_en
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows if preserve user-space was configured
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_shared_alloc_units
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the shared allocated units of WB buffer
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_type
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the configured WB type.
0x1 for shared buffer mode. 0x0 for dedicated buffer mode.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_buff_cap_adj
buffer mode.
The value of this parameter is 3 for TLC NAND when SLC mode
is used as WriteBooster Buffer. 2 for MLC NAND.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_max_alloc_units
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the Maximum total WriteBooster Buffer size
which is supported by the entire device.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_max_wb_luns
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the maximum number of luns that can support
WriteBooster.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_sup_red_type
preserve user space type.
02h: Device can be configured in either user space
reduction type or preserve user space type.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_sup_wb_type
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: The supportability of WriteBooster Buffer type.
- 00h: LU based WriteBooster Buffer configuration
- 01h: Single shared WriteBooster Buffer
- configuration
- 02h: Supporting both LU based WriteBooster
- Buffer and Single shared WriteBooster Buffer
- configuration
+
+ === ==========================================================
+ 00h LU based WriteBooster Buffer configuration
+ 01h Single shared WriteBooster Buffer configuration
+ 02h Supporting both LU based WriteBooster.
+ Buffer and Single shared WriteBooster Buffer configuration
+ === ==========================================================
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/wb_enable
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the status of WriteBooster.
- 0: WriteBooster is not enabled.
- 1: WriteBooster is enabled
+
+ == ============================
+ 0 WriteBooster is not enabled.
+ 1 WriteBooster is enabled
+ == ============================
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/wb_flush_en
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows if flush is enabled.
- 0: Flush operation is not performed.
- 1: Flush operation is performed.
+
+ == =================================
+ 0 Flush operation is not performed.
+ 1 Flush operation is performed.
+ == =================================
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/wb_flush_during_h8
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: Flush WriteBooster Buffer during hibernate state.
- 0: Device is not allowed to flush the
- WriteBooster Buffer during link hibernate
- state.
- 1: Device is allowed to flush the
- WriteBooster Buffer during link hibernate
- state
+
+ == =================================================
+ 0 Device is not allowed to flush the
+ WriteBooster Buffer during link hibernate state.
+ 1 Device is allowed to flush the
+ WriteBooster Buffer during link hibernate state.
+ == =================================================
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/wb_avail_buf
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the amount of unused WriteBooster buffer
available.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/wb_cur_buf
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the amount of unused current buffer.
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/wb_flush_status
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the flush operation status.
- 00h: idle
- 01h: Flush operation in progress
- 02h: Flush operation stopped prematurely.
- 03h: Flush operation completed successfully
- 04h: Flush operation general failure
+
+
+ === ======================================
+ 00h idle
+ 01h Flush operation in progress
+ 02h Flush operation stopped prematurely.
+ 03h Flush operation completed successfully
+ 04h Flush operation general failure
+ === ======================================
+
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/wb_life_time_est
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows an indication of the WriteBooster Buffer
lifetime based on the amount of performed program/erase cycles
- 01h: 0% - 10% WriteBooster Buffer life time used
+
+ === =============================================
+ 01h 0% - 10% WriteBooster Buffer life time used
...
- 0Ah: 90% - 100% WriteBooster Buffer life time used
+ 0Ah 90% - 100% WriteBooster Buffer life time used
+ === =============================================
+
The file is read only.
What: /sys/class/scsi_device/*/device/unit_descriptor/wb_buf_alloc_units
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the configured size of WriteBooster buffer.
0400h corresponds to 4GB.
+
The file is read only.
Description: When written, this file sets the I2C speed on the connected
DS28E17 chip. When read, it reads the current setting from
the DS28E17 chip.
+
Valid values: 100, 400, 900 [kBaud].
+
Default 100, can be set by w1_ds28e17.speed= module parameter.
Users: w1_ds28e17 driver
the busy timeout for I2C operations on the connected DS28E17
chip. When read, returns the current setting.
Valid values: 1 to 9.
+
Default 1, can be set by w1_ds28e17.stretch= module parameter.
Users: w1_ds28e17 driver
device data to its embedded EEPROM, either restore data
embedded in device EEPROM. Be aware that devices support
limited EEPROM writing cycles (typical 50k)
+
* 'save': save device RAM to EEPROM
* 'restore': restore EEPROM data in device RAM
+
Users: any user space application which wants to communicate with
w1_term device
Contact: Akira Shimahara <akira215corp@gmail.com>
Description:
(RO) return the power status by asking the device
+
* '0': device parasite powered
* '1': device externally powered
* '-xx': xx is kernel error when reading power status
+
Users: any user space application which wants to communicate with
w1_term device
will be changed only in device RAM, so it will be cleared when
power is lost. Trigger a 'save' to EEPROM command to keep
values after power-on. Read or write are :
+
* '9..14': device resolution in bit
- or resolution to set in bit
+ or resolution to set in bit
* '-xx': xx is kernel error when reading the resolution
* Anything else: do nothing
+
Some DS18B20 clones are fixed in 12-bit resolution, so the
actual resolution is read back from the chip and verified. Error
is reported if the results differ.
Contact: Akira Shimahara <akira215corp@gmail.com>
Description:
(RO) return the temperature in 1/1000 degC.
+
* If a bulk read has been triggered, it will directly
- return the temperature computed when the bulk read
- occurred, if available. If not yet available, nothing
- is returned (a debug kernel message is sent), you
- should retry later on.
+ return the temperature computed when the bulk read
+ occurred, if available. If not yet available, nothing
+ is returned (a debug kernel message is sent), you
+ should retry later on.
* If no bulk read has been triggered, it will trigger
- a conversion and send the result. Note that the
- conversion duration depend on the resolution (if
- device support this feature). It takes 94ms in 9bits
- resolution, 750ms for 12bits.
+ a conversion and send the result. Note that the
+ conversion duration depend on the resolution (if
+ device support this feature). It takes 94ms in 9bits
+ resolution, 750ms for 12bits.
+
Users: any user space application which wants to communicate with
w1_term device
(RW) return the temperature in 1/1000 degC.
*read*: return 2 lines with the hexa output data sent on the
bus, return the CRC check and temperature in 1/1000 degC
- *write* :
+ *write*:
+
* '0' : save the 2 or 3 bytes to the device EEPROM
- (i.e. TH, TL and config register)
+ (i.e. TH, TL and config register)
* '9..14' : set the device resolution in RAM
- (if supported)
+ (if supported)
* Anything else: do nothing
+
refer to Documentation/w1/slaves/w1_therm.rst for detailed
information.
Users: any user space application which wants to communicate with
Contact: Akira Shimahara <akira215corp@gmail.com>
Description:
(RW) trigger a bulk read conversion. read the status
+
*read*:
- * '-1': conversion in progress on at least 1 sensor
- * '1' : conversion complete but at least one sensor
+ * '-1':
+ conversion in progress on at least 1 sensor
+ * '1' :
+ conversion complete but at least one sensor
value has not been read yet
- * '0' : no bulk operation. Reading temperature will
+ * '0' :
+ no bulk operation. Reading temperature will
trigger a conversion on each device
- *write*: 'trigger': trigger a bulk read on all supporting
+
+ *write*:
+ 'trigger': trigger a bulk read on all supporting
devices on the bus
+
Note that if a bulk read is sent but one sensor is not read
immediately, the next access to temperature on this device
will return the temperature measured at the time of issue
reset to default (datasheet) conversion time for a new
resolution.
- *read*: Actual conversion time in milliseconds. *write*:
- '0': Set the default conversion time from the datasheet.
- '1': Measure and set the conversion time. Make a single
+ *read*:
+ Actual conversion time in milliseconds.
+
+ *write*:
+ * '0':
+ Set the default conversion time from the datasheet.
+ * '1':
+ Measure and set the conversion time. Make a single
temperature conversion, measure an actual value.
Increase it by 20% for temperature range. A new
conversion time can be obtained by reading this
same attribute.
- other positive value:
+ * other positive value:
Set the conversion time in milliseconds.
Users: An application using the w1_term device
(RW) Control optional driver settings.
Bit masks to read/write (bitwise OR):
- 1: Enable check for conversion success. If byte 6 of
+ == ============================================================
+ 1 Enable check for conversion success. If byte 6 of
scratchpad memory is 0xC after conversion, and
temperature reads 85.00 (powerup value) or 127.94
(insufficient power) - return a conversion error.
- 2: Enable poll for conversion completion. Generate read cycles
+ 2 Enable poll for conversion completion. Generate read cycles
after the conversion start and wait for 1's. In parasite
power mode this feature is not available.
+ == ============================================================
+
+ *read*:
+ Currently selected features.
- *read*: Currently selected features.
- *write*: Select features.
+ *write*:
+ Select features.
Users: An application using the w1_term device
When the Wacom Intuos 4 is connected over Bluetooth, the
image has to contain 256 bytes (64x32 px 1 bit colour).
The format is also scrambled, like in the USB mode, and it can
- be summarized by converting 76543210 into GECA6420.
+ be summarized by converting::
+
+ 76543210 into GECA6420.
HGFEDCBA HFDB7531
What: /sys/bus/hid/devices/<bus>:<vid>:<pid>.<n>/wacom_remote/unpair_remote
image: The image bitmap. Currently a 32-bit BMP.
status: 1 if the image is valid, 0 if firmware invalidated it.
type: 0 indicates image is in BMP format.
+
+ ======== ===================================================
version: The version of the BGRT. Currently 1.
xoffset: The number of pixels between the left of the screen
and the left edge of the image.
yoffset: The number of pixels between the top of the screen
and the top edge of the image.
+ ======== ===================================================
What: /sys/firmware/acpi/hotplug/
Date: February 2013
The following setting is available to user space for each
hotplug profile:
+ ======== =======================================================
enabled: If set, the ACPI core will handle notifications of
- hotplug events associated with the given class of
- devices and will allow those devices to be ejected with
- the help of the _EJ0 control method. Unsetting it
- effectively disables hotplug for the correspoinding
- class of devices.
+ hotplug events associated with the given class of
+ devices and will allow those devices to be ejected with
+ the help of the _EJ0 control method. Unsetting it
+ effectively disables hotplug for the correspoinding
+ class of devices.
+ ======== =======================================================
The value of the above attribute is an integer number: 1 (set)
or 0 (unset). Attempts to write any other values to it will
To figure out where all the SCI's are coming from,
/sys/firmware/acpi/interrupts contains a file listing
every possible source, and the count of how many
- times it has triggered.
-
- $ cd /sys/firmware/acpi/interrupts
- $ grep . *
- error: 0
- ff_gbl_lock: 0 enable
- ff_pmtimer: 0 invalid
- ff_pwr_btn: 0 enable
- ff_rt_clk: 2 disable
- ff_slp_btn: 0 invalid
- gpe00: 0 invalid
- gpe01: 0 enable
- gpe02: 108 enable
- gpe03: 0 invalid
- gpe04: 0 invalid
- gpe05: 0 invalid
- gpe06: 0 enable
- gpe07: 0 enable
- gpe08: 0 invalid
- gpe09: 0 invalid
- gpe0A: 0 invalid
- gpe0B: 0 invalid
- gpe0C: 0 invalid
- gpe0D: 0 invalid
- gpe0E: 0 invalid
- gpe0F: 0 invalid
- gpe10: 0 invalid
- gpe11: 0 invalid
- gpe12: 0 invalid
- gpe13: 0 invalid
- gpe14: 0 invalid
- gpe15: 0 invalid
- gpe16: 0 invalid
- gpe17: 1084 enable
- gpe18: 0 enable
- gpe19: 0 invalid
- gpe1A: 0 invalid
- gpe1B: 0 invalid
- gpe1C: 0 invalid
- gpe1D: 0 invalid
- gpe1E: 0 invalid
- gpe1F: 0 invalid
- gpe_all: 1192
- sci: 1194
- sci_not: 0
-
- sci - The number of times the ACPI SCI
- has been called and claimed an interrupt.
-
- sci_not - The number of times the ACPI SCI
- has been called and NOT claimed an interrupt.
-
- gpe_all - count of SCI caused by GPEs.
-
- gpeXX - count for individual GPE source
-
- ff_gbl_lock - Global Lock
-
- ff_pmtimer - PM Timer
-
- ff_pwr_btn - Power Button
-
- ff_rt_clk - Real Time Clock
-
- ff_slp_btn - Sleep Button
-
- error - an interrupt that can't be accounted for above.
-
- invalid: it's either a GPE or a Fixed Event that
- doesn't have an event handler.
-
- disable: the GPE/Fixed Event is valid but disabled.
-
- enable: the GPE/Fixed Event is valid and enabled.
-
- Root has permission to clear any of these counters. Eg.
- # echo 0 > gpe11
-
- All counters can be cleared by clearing the total "sci":
- # echo 0 > sci
+ times it has triggered::
+
+ $ cd /sys/firmware/acpi/interrupts
+ $ grep . *
+ error: 0
+ ff_gbl_lock: 0 enable
+ ff_pmtimer: 0 invalid
+ ff_pwr_btn: 0 enable
+ ff_rt_clk: 2 disable
+ ff_slp_btn: 0 invalid
+ gpe00: 0 invalid
+ gpe01: 0 enable
+ gpe02: 108 enable
+ gpe03: 0 invalid
+ gpe04: 0 invalid
+ gpe05: 0 invalid
+ gpe06: 0 enable
+ gpe07: 0 enable
+ gpe08: 0 invalid
+ gpe09: 0 invalid
+ gpe0A: 0 invalid
+ gpe0B: 0 invalid
+ gpe0C: 0 invalid
+ gpe0D: 0 invalid
+ gpe0E: 0 invalid
+ gpe0F: 0 invalid
+ gpe10: 0 invalid
+ gpe11: 0 invalid
+ gpe12: 0 invalid
+ gpe13: 0 invalid
+ gpe14: 0 invalid
+ gpe15: 0 invalid
+ gpe16: 0 invalid
+ gpe17: 1084 enable
+ gpe18: 0 enable
+ gpe19: 0 invalid
+ gpe1A: 0 invalid
+ gpe1B: 0 invalid
+ gpe1C: 0 invalid
+ gpe1D: 0 invalid
+ gpe1E: 0 invalid
+ gpe1F: 0 invalid
+ gpe_all: 1192
+ sci: 1194
+ sci_not: 0
+
+ =========== ==================================================
+ sci The number of times the ACPI SCI
+ has been called and claimed an interrupt.
+
+ sci_not The number of times the ACPI SCI
+ has been called and NOT claimed an interrupt.
+
+ gpe_all count of SCI caused by GPEs.
+
+ gpeXX count for individual GPE source
+
+ ff_gbl_lock Global Lock
+
+ ff_pmtimer PM Timer
+
+ ff_pwr_btn Power Button
+
+ ff_rt_clk Real Time Clock
+
+ ff_slp_btn Sleep Button
+
+ error an interrupt that can't be accounted for above.
+
+ invalid it's either a GPE or a Fixed Event that
+ doesn't have an event handler.
+
+ disable the GPE/Fixed Event is valid but disabled.
+
+ enable the GPE/Fixed Event is valid and enabled.
+ =========== ==================================================
+
+ Root has permission to clear any of these counters. Eg.::
+
+ # echo 0 > gpe11
+
+ All counters can be cleared by clearing the total "sci"::
+
+ # echo 0 > sci
None of these counters has an effect on the function
of the system, they are simply statistics.
Let's take power button fixed event for example, please kill acpid
and other user space applications so that the machine won't shutdown
- when pressing the power button.
- # cat ff_pwr_btn
- 0 enabled
- # press the power button for 3 times;
- # cat ff_pwr_btn
- 3 enabled
- # echo disable > ff_pwr_btn
- # cat ff_pwr_btn
- 3 disabled
- # press the power button for 3 times;
- # cat ff_pwr_btn
- 3 disabled
- # echo enable > ff_pwr_btn
- # cat ff_pwr_btn
- 4 enabled
- /*
- * this is because the status bit is set even if the enable bit is cleared,
- * and it triggers an ACPI fixed event when the enable bit is set again
- */
- # press the power button for 3 times;
- # cat ff_pwr_btn
- 7 enabled
- # echo disable > ff_pwr_btn
- # press the power button for 3 times;
- # echo clear > ff_pwr_btn /* clear the status bit */
- # echo disable > ff_pwr_btn
- # cat ff_pwr_btn
- 7 enabled
+ when pressing the power button::
+
+ # cat ff_pwr_btn
+ 0 enabled
+ # press the power button for 3 times;
+ # cat ff_pwr_btn
+ 3 enabled
+ # echo disable > ff_pwr_btn
+ # cat ff_pwr_btn
+ 3 disabled
+ # press the power button for 3 times;
+ # cat ff_pwr_btn
+ 3 disabled
+ # echo enable > ff_pwr_btn
+ # cat ff_pwr_btn
+ 4 enabled
+ /*
+ * this is because the status bit is set even if the enable
+ * bit is cleared, and it triggers an ACPI fixed event when
+ * the enable bit is set again
+ */
+ # press the power button for 3 times;
+ # cat ff_pwr_btn
+ 7 enabled
+ # echo disable > ff_pwr_btn
+ # press the power button for 3 times;
+ # echo clear > ff_pwr_btn /* clear the status bit */
+ # echo disable > ff_pwr_btn
+ # cat ff_pwr_btn
+ 7 enabled
doesn't matter), they will be represented in sysfs as
entries "T-0" through "T-(N-1)":
- Example entry directories:
+ Example entry directories::
/sys/firmware/dmi/entries/17-0
/sys/firmware/dmi/entries/17-1
Each DMI entry in sysfs has the common header values
exported as attributes:
- handle : The 16bit 'handle' that is assigned to this
+ ======== =================================================
+ handle The 16bit 'handle' that is assigned to this
entry by the firmware. This handle may be
referred to by other entries.
- length : The length of the entry, as presented in the
+ length The length of the entry, as presented in the
entry itself. Note that this is _not the
total count of bytes associated with the
- entry_. This value represents the length of
+ entry. This value represents the length of
the "formatted" portion of the entry. This
"formatted" region is sometimes followed by
the "unformatted" region composed of nul
terminated strings, with termination signalled
by a two nul characters in series.
- raw : The raw bytes of the entry. This includes the
+ raw The raw bytes of the entry. This includes the
"formatted" portion of the entry, the
"unformatted" strings portion of the entry,
and the two terminating nul characters.
- type : The type of the entry. This value is the same
+ type The type of the entry. This value is the same
as found in the directory name. It indicates
how the rest of the entry should be interpreted.
- instance: The instance ordinal of the entry for the
+ instance The instance ordinal of the entry for the
given type. This value is the same as found
in the parent directory name.
- position: The ordinal position (zero-based) of the entry
+ position The ordinal position (zero-based) of the entry
within the entirety of the DMI entry table.
+ ======== =================================================
- === Entry Specialization ===
+ **Entry Specialization**
Some entry types may have other information available in
sysfs. Not all types are specialized.
- --- Type 15 - System Event Log ---
+ **Type 15 - System Event Log**
This entry allows the firmware to export a log of
events the system has taken. This information is
typically backed by nvram, but the implementation
details are abstracted by this table. This entry's data
- is exported in the directory:
+ is exported in the directory::
- /sys/firmware/dmi/entries/15-0/system_event_log
+ /sys/firmware/dmi/entries/15-0/system_event_log
and has the following attributes (documented in the
SMBIOS / DMI specification under "System Event Log (Type 15)":
- area_length
- header_start_offset
- data_start_offset
- access_method
- status
- change_token
- access_method_address
- header_format
- per_log_type_descriptor_length
- type_descriptors_supported_count
+ - area_length
+ - header_start_offset
+ - data_start_offset
+ - access_method
+ - status
+ - change_token
+ - access_method_address
+ - header_format
+ - per_log_type_descriptor_length
+ - type_descriptors_supported_count
As well, the kernel exports the binary attribute:
- raw_event_log : The raw binary bits of the event log
+ ============= ====================================
+ raw_event_log The raw binary bits of the event log
as described by the DMI entry.
+ ============= ====================================
Date: February 2015
Contact: Peter Jones <pjones@redhat.com>
Description: What kind of firmware entry this is:
- 0 - Unknown
- 1 - System Firmware
- 2 - Device Firmware
- 3 - UEFI Driver
+
+ == ===============
+ 0 Unknown
+ 1 System Firmware
+ 2 Device Firmware
+ 3 UEFI Driver
+ == ===============
What: /sys/firmware/efi/esrt/entries/entry$N/fw_class
Date: February 2015
Contact: Peter Jones <pjones@redhat.com>
Description: The result of the last firmware update attempt for the
firmware resource entry.
- 0 - Success
- 1 - Insufficient resources
- 2 - Incorrect version
- 3 - Invalid format
- 4 - Authentication error
- 5 - AC power event
- 6 - Battery power event
+
+ == ======================
+ 0 Success
+ 1 Insufficient resources
+ 2 Incorrect version
+ 3 Invalid format
+ 4 Authentication error
+ 5 AC power event
+ 6 Battery power event
+ == ======================
/sys/firmware/efi/runtime-map/ is the directory the kernel
exports that information in.
- subdirectories are named with the number of the memory range:
+ subdirectories are named with the number of the memory range::
/sys/firmware/efi/runtime-map/0
/sys/firmware/efi/runtime-map/1
Each subdirectory contains five files:
- attribute : The attributes of the memory range.
- num_pages : The size of the memory range in pages.
- phys_addr : The physical address of the memory range.
- type : The type of the memory range.
- virt_addr : The virtual address of the memory range.
+ ========= =========================================
+ attribute The attributes of the memory range.
+ num_pages The size of the memory range in pages.
+ phys_addr The physical address of the memory range.
+ type The type of the memory range.
+ virt_addr The virtual address of the memory range.
+ ========= =========================================
Above values are all hexadecimal numbers with the '0x' prefix.
Users: Kexec
This directory has the same layout (and
underlying implementation as /sys/firmware/efi/vars.
- See Documentation/ABI/*/sysfs-firmware-efi-vars
+ See `Documentation/ABI/*/sysfs-firmware-efi-vars`
for more information on how to interact with
this structure.
the raw memory map to userspace.
The structure is as follows: Under /sys/firmware/memmap there
- are subdirectories with the number of the entry as their name:
+ are subdirectories with the number of the entry as their name::
/sys/firmware/memmap/0
/sys/firmware/memmap/1
Each directory contains three files:
- start : The start address (as hexadecimal number with the
+ ======== =====================================================
+ start The start address (as hexadecimal number with the
'0x' prefix).
- end : The end address, inclusive (regardless whether the
+ end The end address, inclusive (regardless whether the
firmware provides inclusive or exclusive ranges).
- type : Type of the entry as string. See below for a list of
+ type Type of the entry as string. See below for a list of
valid types.
+ ======== =====================================================
- So, for example:
+ So, for example::
/sys/firmware/memmap/0/start
/sys/firmware/memmap/0/end
- reserved
Following shell snippet can be used to display that memory
- map in a human-readable format:
+ map in a human-readable format::
- -------------------- 8< ----------------------------------------
#!/bin/bash
cd /sys/firmware/memmap
for dir in * ; do
type=$(cat $dir/type)
printf "%016x-%016x (%s)\n" $start $[ $end +1] "$type"
done
- -------------------- >8 ----------------------------------------
to the fw_cfg device can be found in "docs/specs/fw_cfg.txt"
in the QEMU source tree.
- === SysFS fw_cfg Interface ===
+ **SysFS fw_cfg Interface**
The fw_cfg sysfs interface described in this document is only
intended to display discoverable blobs (i.e., those registered
/sys/firmware/qemu_fw_cfg/rev
- --- Discoverable fw_cfg blobs by selector key ---
+ **Discoverable fw_cfg blobs by selector key**
All discoverable blobs listed in the fw_cfg file directory are
displayed as entries named after their unique selector key
Each such fw_cfg sysfs entry has the following values exported
as attributes:
- name : The 56-byte nul-terminated ASCII string used as the
+ ==== ====================================================
+ name The 56-byte nul-terminated ASCII string used as the
blob's 'file name' in the fw_cfg directory.
- size : The length of the blob, as given in the fw_cfg
+ size The length of the blob, as given in the fw_cfg
directory.
- key : The value of the blob's selector key as given in the
+ key The value of the blob's selector key as given in the
fw_cfg directory. This value is the same as used in
the parent directory name.
- raw : The raw bytes of the blob, obtained by selecting the
+ raw The raw bytes of the blob, obtained by selecting the
entry via the control register, and reading a number
of bytes equal to the blob size from the data
register.
+ ==== ====================================================
- --- Listing fw_cfg blobs by file name ---
+ **Listing fw_cfg blobs by file name**
While the fw_cfg device does not impose any specific naming
convention on the blobs registered in the file directory,
QEMU developers have traditionally used path name semantics
- to give each blob a descriptive name. For example:
+ to give each blob a descriptive name. For example::
"bootorder"
"genroms/kvmvapic.bin"
of directories matching the path name components of fw_cfg
blob names, ending in symlinks to the by_key entry for each
"basename", as illustrated below (assume current directory is
- /sys/firmware):
+ /sys/firmware)::
qemu_fw_cfg/by_name/bootorder -> ../by_key/38
qemu_fw_cfg/by_name/etc/e820 -> ../../by_key/35
http://simplefirmware.org/documentation
While the tables are used by the kernel, user-space
- can observe them this way:
+ can observe them this way::
- # cd /sys/firmware/sfi/tables
- # cat $TABLENAME > $TABLENAME.bin
+ # cd /sys/firmware/sfi/tables
+ # cat $TABLENAME > $TABLENAME.bin
The /sys/firmware/sgi_uv directory contains information
about the SGI UV platform.
- Under that directory are a number of files:
+ Under that directory are a number of files::
partition_id
coherence_id
SGI UV systems can be partitioned into multiple physical
machines, which each partition running a unique copy
of the operating system. Each partition will have a unique
- partition id. To display the partition id, use the command:
+ partition id. To display the partition id, use the command::
cat /sys/firmware/sgi_uv/partition_id
A partitioned SGI UV system can have one or more coherence
domain. The coherence id indicates which coherence domain
this partition is in. To display the coherence id, use the
- command:
+ command::
cat /sys/firmware/sgi_uv/coherence_id
Date: August 2019
KernelVersion: 5.4
Contact: Marek Behún <marek.behun@nic.cz>
-Description: (R) Board version burned into eFuses of this Turris Mox board.
+Description: (Read) Board version burned into eFuses of this Turris Mox board.
Format: %i
What: /sys/firmware/turris-mox-rwtm/mac_address*
Date: August 2019
KernelVersion: 5.4
Contact: Marek Behún <marek.behun@nic.cz>
-Description: (R) MAC addresses burned into eFuses of this Turris Mox board.
+Description: (Read) MAC addresses burned into eFuses of this Turris Mox board.
Format: %pM
What: /sys/firmware/turris-mox-rwtm/pubkey
Date: August 2019
KernelVersion: 5.4
Contact: Marek Behún <marek.behun@nic.cz>
-Description: (R) ECDSA public key (in pubkey hex compressed form) computed
+Description: (Read) ECDSA public key (in pubkey hex compressed form) computed
as pair to the ECDSA private key burned into eFuses of this
Turris Mox Board.
Format: string
Date: August 2019
KernelVersion: 5.4
Contact: Marek Behún <marek.behun@nic.cz>
-Description: (R) RAM size in MiB of this Turris Mox board as was detected
+Description: (Read) RAM size in MiB of this Turris Mox board as was detected
during manufacturing and burned into eFuses. Can be 512 or 1024.
Format: %i
Date: August 2019
KernelVersion: 5.4
Contact: Marek Behún <marek.behun@nic.cz>
-Description: (R) Serial number burned into eFuses of this Turris Mox device.
+Description: (Read) Serial number burned into eFuses of this Turris Mox device.
Format: %016X
parameter will have their blocks allocated out of a
block group specific preallocation pool, so that small
files are packed closely together. Each large file
- will have its blocks allocated out of its own unique
- preallocation pool.
+ will have its blocks allocated out of its own unique
+ preallocation pool.
What: /sys/fs/ext4/<disk>/inode_readahead_blks
Date: March 2008
Date: July 2013
Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
Description: Controls the victim selection policy for garbage collection.
- Setting gc_idle = 0(default) will disable this option. Setting
- gc_idle = 1 will select the Cost Benefit approach & setting
- gc_idle = 2 will select the greedy approach & setting
- gc_idle = 3 will select the age-threshold based approach.
+ Setting gc_idle = 0(default) will disable this option. Setting:
+
+ =========== ===============================================
+ gc_idle = 1 will select the Cost Benefit approach & setting
+ gc_idle = 2 will select the greedy approach & setting
+ gc_idle = 3 will select the age-threshold based approach.
+ =========== ===============================================
What: /sys/fs/f2fs/<disk>/reclaim_segments
Date: October 2013
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description: Controls the in-place-update policy.
updates in f2fs. User can set:
- 0x01: F2FS_IPU_FORCE, 0x02: F2FS_IPU_SSR,
- 0x04: F2FS_IPU_UTIL, 0x08: F2FS_IPU_SSR_UTIL,
- 0x10: F2FS_IPU_FSYNC, 0x20: F2FS_IPU_ASYNC,
- 0x40: F2FS_IPU_NOCACHE.
+
+ ==== =================
+ 0x01 F2FS_IPU_FORCE
+ 0x02 F2FS_IPU_SSR
+ 0x04 F2FS_IPU_UTIL
+ 0x08 F2FS_IPU_SSR_UTIL
+ 0x10 F2FS_IPU_FSYNC
+ 0x20 F2FS_IPU_ASYNC,
+ 0x40 F2FS_IPU_NOCACHE
+ ==== =================
+
Refer segment.h for details.
What: /sys/fs/f2fs/<disk>/min_ipu_util
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description: Give a way to attach REQ_META|FUA to data writes
given temperature-based bits. Now the bits indicate:
- * REQ_META | REQ_FUA |
- * 5 | 4 | 3 | 2 | 1 | 0 |
- * Cold | Warm | Hot | Cold | Warm | Hot |
+
+ +-------------------+-------------------+
+ | REQ_META | REQ_FUA |
+ +------+------+-----+------+------+-----+
+ | 5 | 4 | 3 | 2 | 1 | 0 |
+ +------+------+-----+------+------+-----+
+ | Cold | Warm | Hot | Cold | Warm | Hot |
+ +------+------+-----+------+------+-----+
What: /sys/fs/f2fs/<disk>/node_io_flag
Date: June 2020
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description: Give a way to attach REQ_META|FUA to node writes
given temperature-based bits. Now the bits indicate:
- * REQ_META | REQ_FUA |
- * 5 | 4 | 3 | 2 | 1 | 0 |
- * Cold | Warm | Hot | Cold | Warm | Hot |
+
+ +-------------------+-------------------+
+ | REQ_META | REQ_FUA |
+ +------+------+-----+------+------+-----+
+ | 5 | 4 | 3 | 2 | 1 | 0 |
+ +------+------+-----+------+------+-----+
+ | Cold | Warm | Hot | Cold | Warm | Hot |
+ +------+------+-----+------+------+-----+
What: /sys/fs/f2fs/<disk>/iostat_period_ms
Date: April 2020
Contact: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Description: If running under Xen:
Describes mode that Xen's performance-monitoring unit (PMU)
- uses. Accepted values are
- "off" -- PMU is disabled
- "self" -- The guest can profile itself
- "hv" -- The guest can profile itself and, if it is
+ uses. Accepted values are:
+
+ ====== ============================================
+ "off" PMU is disabled
+ "self" The guest can profile itself
+ "hv" The guest can profile itself and, if it is
privileged (e.g. dom0), the hypervisor
- "all" -- The guest can profile itself, the hypervisor
+ "all" The guest can profile itself, the hypervisor
and all other guests. Only available to
privileged guests.
+ ====== ============================================
What: /sys/hypervisor/pmu/pmu_features
Date: August 2015
representation of setup_data type. "data" file is the binary
representation of setup_data payload.
- The whole boot_params directory structure is like below:
- /sys/kernel/boot_params
- |__ data
- |__ setup_data
- | |__ 0
- | | |__ data
- | | |__ type
- | |__ 1
- | |__ data
- | |__ type
- |__ version
+ The whole boot_params directory structure is like below::
+
+ /sys/kernel/boot_params
+ |__ data
+ |__ setup_data
+ | |__ 0
+ | | |__ data
+ | | |__ type
+ | |__ 1
+ | |__ data
+ | |__ type
+ |__ version
Users: Kexec
of the hugepages supported by the kernel/CPU combination.
Under these directories are a number of files:
- nr_hugepages
- nr_overcommit_hugepages
- free_hugepages
- surplus_hugepages
- resv_hugepages
+
+ - nr_hugepages
+ - nr_overcommit_hugepages
+ - free_hugepages
+ - surplus_hugepages
+ - resv_hugepages
+
See Documentation/admin-guide/mm/hugetlbpage.rst for details.
in a tree.
run: write 0 to disable ksm, read 0 while ksm is disabled.
- write 1 to run ksm, read 1 while ksm is running.
- write 2 to disable ksm and unmerge all its pages.
+
+ - write 1 to run ksm, read 1 while ksm is running.
+ - write 2 to disable ksm and unmerge all its pages.
sleep_millisecs: how many milliseconds ksm should sleep between
scans.
number of objects per slab. If a slab cannot be allocated
because of fragmentation, SLUB will retry with the minimum order
possible depending on its characteristics.
+
When debug_guardpage_minorder=N (N > 0) parameter is specified
(see Documentation/admin-guide/kernel-parameters.rst), the minimum possible
order is used and this sysfs entry can not be used to change
new slab has not been possible at the cache's order and instead
fallen back to its minimum possible order. It can be written to
clear the current count.
+
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/partial
slab from a remote node as opposed to allocating a new slab on
the local node. This reduces the amount of wasted memory over
the entire system but can be expensive.
+
Available when CONFIG_NUMA is enabled.
What: /sys/kernel/slab/cache/sanity_checks
Contact: Kirill Smelkov <kirr@mns.spb.ru>
Description: Maximum time allowed for periodic transfers per microframe (μs)
- [ USB 2.0 sets maximum allowed time for periodic transfers per
+ Note:
+ USB 2.0 sets maximum allowed time for periodic transfers per
microframe to be 80%, that is 100 microseconds out of 125
microseconds (full microframe).
However there are cases, when 80% max isochronous bandwidth is
too limiting. For example two video streams could require 110
microseconds of isochronous bandwidth per microframe to work
- together. ]
+ together.
Through this setting it is possible to raise the limit so that
the host controller would allow allocating more than 100
KernelVersion:»·3.3
Contact: Kay Sievers <kay.sievers@vrfy.org>
Description: Module taint flags:
- P - proprietary module
- O - out-of-tree module
- F - force-loaded module
- C - staging driver module
- E - unsigned module
+ == =====================
+ P proprietary module
+ O out-of-tree module
+ F force-loaded module
+ C staging driver module
+ E unsigned module
+ == =====================
Contact: "Corentin Chary" <corentincj@iksaif.net>
Description:
This file allows display switching. The value
- is composed by 4 bits and defined as follow:
- 4321
- |||`- LCD
- ||`-- CRT
- |`--- TV
- `---- DVI
- Ex: - 0 (0000b) means no display
+ is composed by 4 bits and defined as follow::
+
+ 4321
+ |||`- LCD
+ ||`-- CRT
+ |`--- TV
+ `---- DVI
+
+ Ex:
+ - 0 (0000b) means no display
- 3 (0011b) CRT+LCD.
What: /sys/devices/platform/asus_laptop/gps
Description:
Some models like the W1N have a LED display that can be
used to display several items of information.
- To control the LED display, use the following :
+ To control the LED display, use the following::
+
echo 0x0T000DDD > /sys/devices/platform/asus_laptop/
+
where T control the 3 letters display, and DDD the 3 digits display.
The DDD table can be found in Documentation/admin-guide/laptops/asus-laptop.rst
Description:
Change CPU clock configuration (write-only).
There are three available clock configuration:
+
* 0 -> Super Performance Mode
* 1 -> High Performance Mode
* 2 -> Power Saving Mode
In order to use an extended can_id add the
CAN_EFF_FLAG (0x80000000U) to the can_id. Example:
- - standard id 0x7ff:
- echo 0x7ff > /sys/class/net/can0/mb0_id
+ - standard id 0x7ff::
- - extended id 0x1fffffff:
- echo 0x9fffffff > /sys/class/net/can0/mb0_id
+ echo 0x7ff > /sys/class/net/can0/mb0_id
+
+ - extended id 0x1fffffff::
+
+ echo 0x9fffffff > /sys/class/net/can0/mb0_id
this file. To disable a trigger, write its name preceded
by '-' instead.
- For example, to enable the keyboard as trigger run:
+ For example, to enable the keyboard as trigger run::
+
echo +keyboard > /sys/class/leds/dell::kbd_backlight/start_triggers
- To disable it:
+
+ To disable it::
+
echo -keyboard > /sys/class/leds/dell::kbd_backlight/start_triggers
Note that not all the available triggers can be configured.
with any the above units. If no unit is specified, the value
is assumed to be expressed in seconds.
- For example, to set the timeout to 10 minutes run:
+ For example, to set the timeout to 10 minutes run::
+
echo 10m > /sys/class/leds/dell::kbd_backlight/stop_timeout
Note that when this file is read, the returned value might be
For example the token ID "5" would be available
as the following attributes:
- 0005_location
- 0005_value
+ - 0005_location
+ - 0005_value
Tokens will vary from machine to machine, and
only tokens available on that machine will be
Contact: Wu Hao <hao.wu@intel.com>
Description: Read-Only. Read this file to get the name of hwmon device, it
supports values:
- 'dfl_fme_thermal' - thermal hwmon device name
- 'dfl_fme_power' - power hwmon device name
+
+ ================= =========================
+ 'dfl_fme_thermal' thermal hwmon device name
+ 'dfl_fme_power' power hwmon device name
+ ================= =========================
What: /sys/bus/platform/devices/dfl-fme.0/hwmon/hwmonX/temp1_input
Date: October 2019
Contact: Wu Hao <hao.wu@intel.com>
Description: Read-Only. Read this file to get the policy of hardware threshold1
(see 'temp1_max'). It only supports two values (policies):
- 0 - AP2 state (90% throttling)
- 1 - AP1 state (50% throttling)
+
+ == ==========================
+ 0 AP2 state (90% throttling)
+ 1 AP1 state (50% throttling)
+ == ==========================
What: /sys/bus/platform/devices/dfl-fme.0/hwmon/hwmonX/power1_input
Date: October 2019
Contact: linux-acpi@vger.kernel.org
Description:
(RO) Display the platform power source
+
+ ========= ============================
bits[3:0] Current power source
- 0x00 = DC
- 0x01 = AC
- 0x02 = USB
- 0x03 = Wireless Charger
+ - 0x00 = DC
+ - 0x01 = AC
+ - 0x02 = USB
+ - 0x03 = Wireless Charger
bits[7:4] Power source sequence number
+ ========= ============================
What: /sys/bus/platform/devices/INT3407:00/dptf_power/battery_steady_power
Date: Jul, 2016
Contact: "Corentin Chary" <corentincj@iksaif.net>
Description:
This file allows display switching.
+
- 1 = LCD
- 2 = CRT
- 3 = LCD+CRT
+
If you run X11, you should use xrandr instead.
What: /sys/devices/platform/eeepc/camera
Description:
Change CPU clock configuration.
On the Eee PC 1000H there are three available clock configuration:
+
* 0 -> Super Performance Mode
* 1 -> High Performance Mode
* 2 -> Power Saving Mode
+
On Eee PC 701 there is only 2 available clock configurations.
Available configuration are listed in available_cpufv file.
Reading this file will show the raw hexadecimal value which
- is defined as follow:
- | 8 bit | 8 bit |
- | `---- Current mode
- `------------ Availables modes
+ is defined as follow::
+
+ | 8 bit | 8 bit |
+ | `---- Current mode
+ `------------ Availables modes
+
For example, 0x301 means: mode 1 selected, 3 available modes.
What: /sys/devices/platform/eeepc/available_cpufv
Description:
Reading the file will give you a list of masters which can be
selected for a demultiplexed bus. The format is
- "<index>:<name>". Example from a Renesas Lager board:
+ "<index>:<name>". Example from a Renesas Lager board::
- 0:/i2c@e6500000 1:/i2c@e6508000
+ 0:/i2c@e6500000 1:/i2c@e6508000
What: /sys/devices/platform/<i2c-demux-name>/current_master
Date: January 2016
Description:
Change fan mode
There are four available modes:
+
* 0 -> Super Silent Mode
* 1 -> Standard Mode
* 2 -> Dust Cleaning
Contact: "Oleg Keri <ezhi99@gmail.com>"
Description:
Control fn-lock mode.
+
* 1 -> Switched On
* 0 -> Switched Off
- For example:
- # echo "0" > \
- /sys/bus/pci/devices/0000:00:1f.0/PNP0C09:00/VPC2004:00/fn_lock
+ For example::
+
+ # echo "0" > \
+ /sys/bus/pci/devices/0000:00:1f.0/PNP0C09:00/VPC2004:00/fn_lock
of 0 and userspace can signal SBL to update firmware,
on next reboot, by writing a value of 1.
There are two available states:
+
* 0 -> Skip firmware update while rebooting
* 1 -> Attempt firmware update on next reboot
Thunderbolt controllers to turn on or off when no
devices are connected (write-only)
There are two available states:
+
* 0 -> Force power disabled
* 1 -> Force power enabled
Description:
Name of the UART device at which the WL128x chip
is connected. example: "/dev/ttyS0".
+
The device name flows down to architecture specific board
initialization file from the SFI/ATAGS bootloader
firmware. The name exposed is read from the user-space
Description:
The Life-cycle state of the SoC, which could be one of the
following values.
- Production - Production state and can be updated to secure
- GA Secured - Secure chip and not able to change state
- GA Non-Secured - Non-Secure chip and not able to change state
- RMA - Return Merchandise Authorization
+
+ ============== =============================================
+ Production Production state and can be updated to secure
+ GA Secured Secure chip and not able to change state
+ GA Non-Secured Non-Secure chip and not able to change state
+ RMA Return Merchandise Authorization
+ ============== =============================================
What: /sys/bus/platform/devices/MLNXBF04:00/post_reset_wdog
Date: Oct 2019
Contact: "Liming Sun <lsun@mellanox.com>"
Description:
The source of the boot stream for the next reset. It could be
- one of the following values.
- external - boot from external source (USB or PCIe)
- emmc - boot from the onchip eMMC
- emmc_legacy - boot from the onchip eMMC in legacy (slow) mode
+ one of the following values:
+
+ =========== ===============================================
+ external boot from external source (USB or PCIe)
+ emmc boot from the onchip eMMC
+ emmc_legacy boot from the onchip eMMC in legacy (slow) mode
+ =========== ===============================================
What: /sys/bus/platform/devices/MLNXBF04:00/second_reset_action
Date: Oct 2019
Update the source of the boot stream after next reset. It could
be one of the following values and will be applied after next
reset.
- external - boot from external source (USB or PCIe)
- emmc - boot from the onchip eMMC
- emmc_legacy - boot from the onchip eMMC in legacy (slow) mode
- swap_emmc - swap the primary / secondary boot partition
- none - cancel the action
+
+ =========== ===============================================
+ external boot from external source (USB or PCIe)
+ emmc boot from the onchip eMMC
+ emmc_legacy boot from the onchip eMMC in legacy (slow) mode
+ swap_emmc swap the primary / secondary boot partition
+ none cancel the action
+ =========== ===============================================
What: /sys/bus/platform/devices/MLNXBF04:00/secure_boot_fuse_state
Date: Oct 2019
Contact: "Liming Sun <lsun@mellanox.com>"
Description:
The state of eFuse versions with the following values.
- InUse - burnt, valid and currently in use
- Used - burnt and valid
- Free - not burnt and free to use
- Skipped - not burnt but not free (skipped)
- Wasted - burnt and invalid
- Invalid - not burnt but marked as valid (error state).
+
+ ======= ===============================================
+ InUse burnt, valid and currently in use
+ Used burnt and valid
+ Free not burnt and free to use
+ Skipped not burnt but not free (skipped)
+ Wasted burnt and invalid
+ Invalid not burnt but marked as valid (error state).
+ ======= ===============================================
The file can show/change the phy mode for role swap of usb.
Write the following strings to change the mode:
- "host" - switching mode from peripheral to host.
- "peripheral" - switching mode from host to peripheral.
+
+ - "host" - switching mode from peripheral to host.
+ - "peripheral" - switching mode from host to peripheral.
Read the file, then it shows the following strings:
- "host" - The mode is host now.
- "peripheral" - The mode is peripheral now.
+
+ - "host" - The mode is host now.
+ - "peripheral" - The mode is peripheral now.
The file can show/change the drd mode of usb.
Write the following string to change the mode:
- "host" - switching mode from peripheral to host.
- "peripheral" - switching mode from host to peripheral.
+
+ - "host" - switching mode from peripheral to host.
+ - "peripheral" - switching mode from host to peripheral.
Read the file, then it shows the following strings:
- "host" - The mode is host now.
- "peripheral" - The mode is peripheral now.
+
+ - "host" - The mode is host now.
+ - "peripheral" - The mode is peripheral now.
Description:
LPE Firmware version for SST driver on all atom
plaforms (BYT/CHT/Merrifield/BSW).
- If the FW has never been loaded it will display:
+ If the FW has never been loaded it will display::
+
"FW not yet loaded"
- If FW has been loaded it will display:
+
+ If FW has been loaded it will display::
+
"v01.aa.bb.cc"
+
aa: Major version is reflecting SoC version:
+
+ === =============
0d: BYT FW
0b: BSW FW
07: Merrifield FW
+ === =============
+
bb: Minor version
+
cc: Build version
Description:
Current status of the device.
Allowed values:
- 1 - Device is available and can be exported
- 2 - Device is currently exported
- 3 - Fatal error occurred during communication
- with peer
+
+ == ==========================================
+ 1 Device is available and can be exported
+ 2 Device is currently exported
+ 3 Fatal error occurred during communication
+ with peer
+ == ==========================================
What: /sys/devices/platform/usbip-vudc.%d/usbip_sockfd
Date: April 2016
which affects charging via the special USB PowerShare port
(marked with a small lightning bolt or battery icon) when in
low power states:
+
- In S0, the port will always provide power.
- In S0ix, if usb_charge is enabled, then power will be
supplied to the port when on AC or if battery is > 50%.
suspend-to-disk mechanism. Reading from this file returns
the name of the method by which the system will be put to
sleep on the next suspend. There are four methods supported:
+
'firmware' - means that the memory image will be saved to disk
by some firmware, in which case we also assume that the
firmware will handle the system suspend.
+
'platform' - the memory image will be saved by the kernel and
the system will be put to sleep by the platform driver (e.g.
ACPI or other PM registers).
+
'shutdown' - the memory image will be saved by the kernel and
the system will be powered off.
+
'reboot' - the memory image will be saved by the kernel and
the system will be rebooted.
The suspend-to-disk method may be chosen by writing to this
file one of the accepted strings:
- 'firmware'
- 'platform'
- 'shutdown'
- 'reboot'
- 'testproc'
- 'test'
+ - 'firmware'
+ - 'platform'
+ - 'shutdown'
+ - 'reboot'
+ - 'testproc'
+ - 'test'
It will only change to 'firmware' or 'platform' if the system
supports that.
string representing a nonzero integer into it.
To use this debugging feature you should attempt to suspend
- the machine, then reboot it and run
+ the machine, then reboot it and run::
- dmesg -s 1000000 | grep 'hash matches'
+ dmesg -s 1000000 | grep 'hash matches'
If you do not get any matches (or they appear to be false
positives), it is possible that the last PM event point
wakeup sources created with the help of /sys/power/wake_lock.
When a string is written to /sys/power/wake_unlock, it will be
assumed to represent the name of a wakeup source to deactivate.
+
If a wakeup source object of that name exists and is active at
the moment, it will be deactivated.
/sys/kernel/profiling is the runtime equivalent
of the boot-time profile= option.
- You can get the same effect running:
+ You can get the same effect running::
echo 2 > /sys/kernel/profiling
pin offered by the PTP hardware clock. The file name
is the hardware dependent pin name. Reading from this
file produces two numbers, the assigned function (see
- the PTP_PF_ enumeration values in linux/ptp_clock.h)
+ the `PTP_PF_` enumeration values in linux/ptp_clock.h)
and the channel number. The function and channel
assignment may be changed by two writing numbers into
the file.
Enable passing additional variables for synthetic uevents that
are generated by writing /sys/.../uevent file.
- Recognized extended format is ACTION [UUID [KEY=VALUE ...].
+ Recognized extended format is::
- The ACTION is compulsory - it is the name of the uevent action
- ("add", "change", "remove"). There is no change compared to
- previous functionality here. The rest of the extended format
- is optional.
+ ACTION [UUID [KEY=VALUE ...]
+
+ The ACTION is compulsory - it is the name of the uevent
+ action (``add``, ``change``, ``remove``). There is no change
+ compared to previous functionality here. The rest of the
+ extended format is optional.
You need to pass UUID first before any KEY=VALUE pairs.
- The UUID must be in "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
+ The UUID must be in ``xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx``
format where 'x' is a hex digit. The UUID is considered to be
a transaction identifier so it's possible to use the same UUID
value for one or more synthetic uevents in which case we
logically group these uevents together for any userspace
listeners. The UUID value appears in uevent as
- "SYNTH_UUID=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" environment
+ ``SYNTH_UUID=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx`` environment
variable.
If UUID is not passed in, the generated synthetic uevent gains
- "SYNTH_UUID=0" environment variable automatically.
+ ``SYNTH_UUID=0`` environment variable automatically.
The KEY=VALUE pairs can contain alphanumeric characters only.
+
It's possible to define zero or more pairs - each pair is then
delimited by a space character ' '. Each pair appears in
- synthetic uevent as "SYNTH_ARG_KEY=VALUE". That means the KEY
- name gains "SYNTH_ARG_" prefix to avoid possible collisions
+ synthetic uevent as ``SYNTH_ARG_KEY=VALUE``. That means the KEY
+ name gains ``SYNTH_ARG_`` prefix to avoid possible collisions
with existing variables.
- Example of valid sequence written to the uevent file:
+ Example of valid sequence written to the uevent file::
add fe4d7c9d-b8c6-4a70-9ef1-3d8a58d18eed A=1 B=abc
- This generates synthetic uevent including these variables:
+ This generates synthetic uevent including these variables::
ACTION=add
SYNTH_ARG_A=1
SYNTH_ARG_B=abc
SYNTH_UUID=fe4d7c9d-b8c6-4a70-9ef1-3d8a58d18eed
+
Users:
udev, userspace tools generating synthetic uevents
7. Device is unplugged.
References:
- [WUSB-AM] Association Models Supplement to the
+ [WUSB-AM]
+ Association Models Supplement to the
Certified Wireless Universal Serial Bus
Specification, version 1.0.
KernelVersion: 5.6
Contact: linux-usb@vger.kernel.org
Description: There are two USB charger states:
- USB_CHARGER_ABSENT
- USB_CHARGER_PRESENT
+
+ - USB_CHARGER_ABSENT
+ - USB_CHARGER_PRESENT
+
There are five USB charger types:
- USB_CHARGER_UNKNOWN_TYPE: Charger type is unknown
- USB_CHARGER_SDP_TYPE: Standard Downstream Port
- USB_CHARGER_CDP_TYPE: Charging Downstream Port
- USB_CHARGER_DCP_TYPE: Dedicated Charging Port
- USB_CHARGER_ACA_TYPE: Accessory Charging Adapter
+
+ ======================== ==========================
+ USB_CHARGER_UNKNOWN_TYPE Charger type is unknown
+ USB_CHARGER_SDP_TYPE Standard Downstream Port
+ USB_CHARGER_CDP_TYPE Charging Downstream Port
+ USB_CHARGER_DCP_TYPE Dedicated Charging Port
+ USB_CHARGER_ACA_TYPE Accessory Charging Adapter
+ ======================== ==========================
+
https://www.usb.org/document-library/battery-charging-v12-spec-and-adopters-agreement
- Here are two examples taken using udevadm monitor -p when
- USB charger is online:
- UDEV change /devices/soc0/usbphynop1 (platform)
- ACTION=change
- DEVPATH=/devices/soc0/usbphynop1
- DRIVER=usb_phy_generic
- MODALIAS=of:Nusbphynop1T(null)Cusb-nop-xceiv
- OF_COMPATIBLE_0=usb-nop-xceiv
- OF_COMPATIBLE_N=1
- OF_FULLNAME=/usbphynop1
- OF_NAME=usbphynop1
- SEQNUM=2493
- SUBSYSTEM=platform
- USB_CHARGER_STATE=USB_CHARGER_PRESENT
- USB_CHARGER_TYPE=USB_CHARGER_SDP_TYPE
- USEC_INITIALIZED=227422826
-
- USB charger is offline:
- KERNEL change /devices/soc0/usbphynop1 (platform)
- ACTION=change
- DEVPATH=/devices/soc0/usbphynop1
- DRIVER=usb_phy_generic
- MODALIAS=of:Nusbphynop1T(null)Cusb-nop-xceiv
- OF_COMPATIBLE_0=usb-nop-xceiv
- OF_COMPATIBLE_N=1
- OF_FULLNAME=/usbphynop1
- OF_NAME=usbphynop1
- SEQNUM=2494
- SUBSYSTEM=platform
- USB_CHARGER_STATE=USB_CHARGER_ABSENT
- USB_CHARGER_TYPE=USB_CHARGER_UNKNOWN_TYPE
+ Here are two examples taken using ``udevadm monitor -p`` when
+ USB charger is online::
+
+ UDEV change /devices/soc0/usbphynop1 (platform)
+ ACTION=change
+ DEVPATH=/devices/soc0/usbphynop1
+ DRIVER=usb_phy_generic
+ MODALIAS=of:Nusbphynop1T(null)Cusb-nop-xceiv
+ OF_COMPATIBLE_0=usb-nop-xceiv
+ OF_COMPATIBLE_N=1
+ OF_FULLNAME=/usbphynop1
+ OF_NAME=usbphynop1
+ SEQNUM=2493
+ SUBSYSTEM=platform
+ USB_CHARGER_STATE=USB_CHARGER_PRESENT
+ USB_CHARGER_TYPE=USB_CHARGER_SDP_TYPE
+ USEC_INITIALIZED=227422826
+
+ USB charger is offline::
+
+ KERNEL change /devices/soc0/usbphynop1 (platform)
+ ACTION=change
+ DEVPATH=/devices/soc0/usbphynop1
+ DRIVER=usb_phy_generic
+ MODALIAS=of:Nusbphynop1T(null)Cusb-nop-xceiv
+ OF_COMPATIBLE_0=usb-nop-xceiv
+ OF_COMPATIBLE_N=1
+ OF_FULLNAME=/usbphynop1
+ OF_NAME=usbphynop1
+ SEQNUM=2494
+ SUBSYSTEM=platform
+ USB_CHARGER_STATE=USB_CHARGER_ABSENT
+ USB_CHARGER_TYPE=USB_CHARGER_UNKNOWN_TYPE
longer functional a uevent will be raised. The uevent will
contain ACTION=offline and ERROR=DEAD.
- Here is an example taken using udevadm monitor -p:
+ Here is an example taken using udevadm monitor -p::
- KERNEL[130.428945] offline /devices/pci0000:00/0000:00:10.0/usb2 (usb)
- ACTION=offline
- BUSNUM=002
- DEVNAME=/dev/bus/usb/002/001
- DEVNUM=001
- DEVPATH=/devices/pci0000:00/0000:00:10.0/usb2
- DEVTYPE=usb_device
- DRIVER=usb
- ERROR=DEAD
- MAJOR=189
- MINOR=128
- PRODUCT=1d6b/2/414
- SEQNUM=2168
- SUBSYSTEM=usb
- TYPE=9/0/1
+ KERNEL[130.428945] offline /devices/pci0000:00/0000:00:10.0/usb2 (usb)
+ ACTION=offline
+ BUSNUM=002
+ DEVNAME=/dev/bus/usb/002/001
+ DEVNUM=001
+ DEVPATH=/devices/pci0000:00/0000:00:10.0/usb2
+ DEVTYPE=usb_device
+ DRIVER=usb
+ ERROR=DEAD
+ MAJOR=189
+ MINOR=128
+ PRODUCT=1d6b/2/414
+ SEQNUM=2168
+ SUBSYSTEM=usb
+ TYPE=9/0/1
Users: chromium-os-dev@chromium.org
If unsure, select 'N'.
+config WARN_ABI_ERRORS
+ bool "Warn if there are errors at ABI files"
+ depends on COMPILE_TEST
+ help
+ The files under Documentation/ABI should follow what's
+ described at Documentation/ABI/README. Yet, as they're manually
+ written, it would be possible that some of those files would
+ have errors that would break them for being parsed by
+ scripts/get_abi.pl. Add a check to verify them.
+ If unsure, select 'N'.
$(shell $(srctree)/scripts/documentation-file-ref-check --warn)
endif
+# Check for broken ABI files
+ifeq ($(CONFIG_WARN_ABI_ERRORS),y)
+$(shell $(srctree)/scripts/get_abi.pl validate --dir $(srctree)/Documentation/ABI)
+endif
+
# You can set these variables from the command line.
SPHINXBUILD = sphinx-build
SPHINXOPTS =
--- /dev/null
+ABI obsolete symbols
+====================
+
+Documents interfaces that are still remaining in the kernel, but are
+marked to be removed at some later point in time.
+
+The description of the interface will document the reason why it is
+obsolete and when it can be expected to be removed.
+
+.. kernel-abi:: $srctree/Documentation/ABI/obsolete
+ :rst:
--- /dev/null
+ABI removed symbols
+===================
+
+.. kernel-abi:: $srctree/Documentation/ABI/removed
+ :rst:
--- /dev/null
+ABI stable symbols
+==================
+
+Documents the interfaces that the developer has defined to be stable.
+
+Userspace programs are free to use these interfaces with no
+restrictions, and backward compatibility for them will be guaranteed
+for at least 2 years.
+
+Most interfaces (like syscalls) are expected to never change and always
+be available.
+
+.. kernel-abi:: $srctree/Documentation/ABI/stable
+ :rst:
--- /dev/null
+ABI testing symbols
+===================
+
+Documents interfaces that are felt to be stable,
+as the main development of this interface has been completed.
+
+The interface can be changed to add new features, but the
+current interface will not break by doing this, unless grave
+errors or security problems are found in them.
+
+Userspace programs can start to rely on these interfaces, but they must
+be aware of changes that can occur before these interfaces move to
+be marked stable.
+
+Programs that use these interfaces are strongly encouraged to add their
+name to the description of these interfaces, so that the kernel
+developers can easily notify them if any changes occur.
+
+.. kernel-abi:: $srctree/Documentation/ABI/testing
+ :rst:
--- /dev/null
+=====================
+Linux ABI description
+=====================
+
+.. toctree::
+ :maxdepth: 2
+
+ abi-stable
+ abi-testing
+ abi-obsolete
+ abi-removed
devices
sysctl/index
+ abi
+
This section describes CPU vulnerabilities and their mitigations.
.. toctree::
system call) are not checked if the user thread tag checking mode is
``PR_MTE_TCF_NONE`` or ``PR_MTE_TCF_ASYNC``. If the tag checking mode is
``PR_MTE_TCF_SYNC``, the kernel makes a best effort to check its user
-address accesses, however it cannot always guarantee it.
+address accesses, however it cannot always guarantee it. Kernel accesses
+to user addresses are always performed with an effective ``PSTATE.TCO``
+value of zero, regardless of the user configuration.
Excluding Tags in the ``IRG``, ``ADDG`` and ``SUBG`` instructions
-----------------------------------------------------------------
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A76 | #1463225 | ARM64_ERRATUM_1463225 |
+----------------+-----------------+-----------------+-----------------------------+
+| ARM | Cortex-A77 | #1508412 | ARM64_ERRATUM_1508412 |
++----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-N1 | #1188873,1418040| ARM64_ERRATUM_1418040 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-N1 | #1349291 | N/A |
# ones.
extensions = ['kerneldoc', 'rstFlatTable', 'kernel_include',
'kfigure', 'sphinx.ext.ifconfig', 'automarkup',
- 'maintainers_include', 'sphinx.ext.autosectionlabel' ]
+ 'maintainers_include', 'sphinx.ext.autosectionlabel',
+ 'kernel_abi']
#
# cdomain is badly broken in Sphinx 3+. Leaving it out generates *most*
- enum:
- ucrobotics,bubblegum-96 # uCRobotics Bubblegum-96
- const: actions,s900
+
+additionalProperties: true
- altr,socfpga-arria5
- altr,socfpga-arria10
- const: altr,socfpga
+
+additionalProperties: true
+
...
- amazon,al-alpine-v3-evp
- const: amazon,al-alpine-v3
+additionalProperties: true
+
...
- enum:
- amlogic,ad401
- const: amlogic,a1
+
+additionalProperties: true
+
...
- compatible
- core-module@10000000
+additionalProperties: true
+
...
- compatible
- soc
+additionalProperties: true
+
...
- compatible
- core-module@10000000
+additionalProperties: true
+
...
required:
- arm,hbi
+additionalProperties: true
+
...
- const: atmel,samv71
- const: atmel,samv7
+additionalProperties: true
+
...
- const: lsi,axm5516-amarillo
- const: lsi,axm5516
+additionalProperties: true
+
...
- raspberrypi,3-compute-module-lite
- const: brcm,bcm2837
+additionalProperties: true
+
...
- brcm,bcm28155-ap
- const: brcm,bcm11351
+additionalProperties: true
+
...
- brcm,bcm21664-garnet
- const: brcm,bcm21664
+additionalProperties: true
+
...
- brcm,bcm23550-sparrow
- const: brcm,bcm23550
+additionalProperties: true
+
...
- const: brcm,brcm53012
- const: brcm,brcm53016
- const: brcm,bcm4708
+
+additionalProperties: true
+
...
- brcm,bcm58305
- const: brcm,cygnus
+additionalProperties: true
+
...
- const: brcm,bcm53342
- const: brcm,hr2
+additionalProperties: true
+
...
- brcm,ns2-xmc
- const: brcm,ns2
+additionalProperties: true
+
...
- brcm,bcm88312
- const: brcm,nsp
+additionalProperties: true
+
...
- brcm,bcm958802a802x
- const: brcm,stingray
+additionalProperties: true
+
...
- cavium,thunderx2-cn9900
- const: brcm,vulcan-soc
+additionalProperties: true
+
...
- enum:
- bitmain,sophon-edge
- const: bitmain,bm1880
+
+additionalProperties: true
+
...
- enum:
- calxeda,highbank
- calxeda,ecx-2000
+
+additionalProperties: true
compatible:
const: cnxt,cx92755
+additionalProperties: true
+
...
- fsl,s32v234-evb # S32V234-EVB2 Customer Evaluation Board
- const: fsl,s32v234
+additionalProperties: true
+
...
items:
- const: H836ASDJ
- const: hisilicon,sd5203
+
+additionalProperties: true
+
...
- enum:
- intel,keembay-evm
- const: intel,keembay
+
+additionalProperties: true
+
...
- enum:
- gateworks,gw2358
- const: intel,ixp43x
+
+additionalProperties: true
- description: TI-SCI processor id for the remote processor device
- description: TI-SCI host id to which processor control ownership
should be transferred to
+
+additionalProperties: true
- const: marvell,cn9130
- const: marvell,armada-ap807-quad
- const: marvell,armada-ap807
+
+additionalProperties: true
- const: google,krane-sku176
- const: google,krane
- const: mediatek,mt8183
+
+additionalProperties: true
+
...
- compatible
- axi@600000000
+additionalProperties: true
+
...
- const: moxa,moxart-uc-7112-lx
- const: moxa,moxart
+additionalProperties: true
...
- enum:
- dell,wyse-ariel
- const: marvell,mmp3
+
+additionalProperties: true
+
...
- enum:
- 70mai,midrived08 # 70mai midrive d08
- const: mstar,mercury5
+
+additionalProperties: true
- ea,ea3250
- phytec,phy3250
- const: nxp,lpc3250
+
+additionalProperties: true
...
- qcom,sm8250-mtp
- const: qcom,sm8250
+additionalProperties: true
+
...
- xunlong,orangepi-i96 # Orange Pi i96
- const: rda,8810pl
+additionalProperties: true
+
...
- enum:
- realtek,mjolnir # Realtek Mjolnir EVB
- const: realtek,rtd1619
+
+additionalProperties: true
+
...
- renesas,rzn1d400-db # RZN1D-DB (RZ/N1D Demo Board for the RZ/N1D 400 pins package)
- const: renesas,r9a06g032
+additionalProperties: true
+
...
items:
- const: zkmagic,a95x-z2
- const: rockchip,rk3318
+
+additionalProperties: true
+
...
required:
- compatible
+
+additionalProperties: true
- items:
- const: sirf,prima2-cb
- const: sirf,prima2
+
+additionalProperties: true
+
...
- enum:
- socionext,milbeaut-m10v-evb
- const: socionext,sc2000a
+
+additionalProperties: true
+
...
- enum:
- socionext,uniphier-pxs3-ref
- const: socionext,uniphier-pxs3
+
+additionalProperties: true
- st,spear320
- st,spear1310
- st,spear1340
+
+additionalProperties: true
+
...
- sprd,sp9863a-1h10
- const: sprd,sc9863a
+additionalProperties: true
+
...
- st,stih407
- st,stih410
- st,stih418
+
+additionalProperties: true
+
...
- const: st,stm32mp157
- description: Odyssey STM32MP1 SoM based Boards
items:
- - enum:
- - seeed,stm32mp157c-odyssey
- - const: seeed,stm32mp157c-odyssey-som
- - const: st,stm32mp157
+ - enum:
+ - seeed,stm32mp157c-odyssey
+ - const: seeed,stm32mp157c-odyssey-som
+ - const: st,stm32mp157
+
+additionalProperties: true
+
...
items:
- const: xunlong,orangepi-zero-plus2-h3
- const: allwinner,sun8i-h3
+
+additionalProperties: true
- enum:
- nvidia,tegra234-vdk
- const: nvidia,tegra234
+
+additionalProperties: true
- description: K3 J7200 SoC
items:
- const: ti,j7200
+
+additionalProperties: true
+
...
- ti,nspire-tp
# Clickpad models
- ti,nspire-clp
+
+additionalProperties: true
+
...
- enbw,cmc # EnBW AM1808 based CMC board
- lego,ev3 # LEGO MINDSTORMS EV3 (AM1808 based)
- const: ti,da850
+
+additionalProperties: true
+
...
- enum:
- toshiba,tmpv7708-rm-mbrc # TMPV7708 RM main board
- const: toshiba,tmpv7708
+
+additionalProperties: true
+
...
items:
- const: samsung,golden
- const: st-ericsson,u8500
+
+additionalProperties: true
- wm,wm8650
- wm,wm8750
- wm,wm8850
+
+additionalProperties: true
+
- const: xlnx,zynqmp-zcu111
- const: xlnx,zynqmp
+additionalProperties: true
+
...
- zte,zx296718-evb
- const: zte,zx296718
+additionalProperties: true
+
...
title: Toshiba TC358775 DSI to LVDS bridge bindings
maintainers:
- - Vinay Simha BN <simhavcs@gmail.com>
+ - Vinay Simha BN <simhavcs@gmail.com>
description: |
- This binding supports DSI to LVDS bridge TC358775
+ This binding supports DSI to LVDS bridge TC358775
- MIPI DSI-RX Data 4-lane, CLK 1-lane with data rates up to 800 Mbps/lane.
- Video frame size:
- Up to 1600x1200 24-bit/pixel resolution for single-link LVDS display panel
- limited by 135 MHz LVDS speed
- Up to WUXGA (1920x1200 24-bit pixels) resolution for dual-link LVDS display
- panel, limited by 270 MHz LVDS speed.
+ MIPI DSI-RX Data 4-lane, CLK 1-lane with data rates up to 800 Mbps/lane.
+ Video frame size:
+ Up to 1600x1200 24-bit/pixel resolution for single-link LVDS display panel
+ limited by 135 MHz LVDS speed
+ Up to WUXGA (1920x1200 24-bit pixels) resolution for dual-link LVDS display
+ panel, limited by 270 MHz LVDS speed.
properties:
compatible:
vdd-supply:
maxItems: 1
- description: 1.2V LVDS Power Supply
+ description: 1.2V LVDS Power Supply
vddio-supply:
maxItems: 1
- port@1
required:
- - compatible
- - reg
- - vdd-supply
- - vddio-supply
- - stby-gpios
- - reset-gpios
- - ports
+ - compatible
+ - reg
+ - vdd-supply
+ - vddio-supply
+ - stby-gpios
+ - reset-gpios
+ - ports
+
+additionalProperties: false
examples:
- - |
+ - |
#include <dt-bindings/gpio/gpio.h>
/* For single-link LVDS display panel */
};
};
- - |
+ - |
/* For dual-link LVDS display panel */
i2c@78b8000 {
compatible:
items:
- enum:
- - bananapi,lhr050h41
- - feixin,k101-im2byl02
-
+ - bananapi,lhr050h41
+ - feixin,k101-im2byl02
- const: ilitek,ili9881c
backlight: true
reset-gpios: true
+ 'mantix,tp-rstn-gpios':
+ description: second reset line that triggers DSI config load
+
backlight: true
required:
avee-supply = <®_avee>;
vddi-supply = <®_1v8_p>;
reset-gpios = <&gpio1 29 GPIO_ACTIVE_LOW>;
+ mantix,tp-rstn-gpios = <&gpio1 24 GPIO_ACTIVE_LOW>;
backlight = <&backlight>;
};
};
- "#address-cells"
- "#size-cells"
+additionalProperties: false
examples:
- |
at25,byte-len:
$ref: /schemas/types.yaml#/definitions/uint32
description:
- Total eeprom size in bytes. Deprecated, use "size" property instead.
+ Total eeprom size in bytes. Deprecated, use "size" property instead.
deprecated: true
at25,addr-mode:
$ref: /schemas/types.yaml#/definitions/uint32
description:
- Addr-mode flags, as defined in include/linux/spi/eeprom.h.
- Deprecated, use "address-width" property instead.
+ Addr-mode flags, as defined in include/linux/spi/eeprom.h.
+ Deprecated, use "address-width" property instead.
deprecated: true
at25,page-size:
gpio-controller: true
gpio-line-names:
- minItems: 1
- maxItems: 8
+ minItems: 1
+ maxItems: 8
required:
- compatible
--- /dev/null
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+
+$id: http://devicetree.org/schemas/i2c/google,cros-ec-i2c-tunnel.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: I2C bus that tunnels through the ChromeOS EC (cros-ec)
+
+maintainers:
+ - Doug Anderson <dianders@chromium.org>
+ - Benson Leung <bleung@chromium.org>
+ - Enric Balletbo i Serra <enric.balletbo@collabora.com>
+
+description: |
+ On some ChromeOS board designs we've got a connection to the EC
+ (embedded controller) but no direct connection to some devices on the
+ other side of the EC (like a battery and PMIC). To get access to
+ those devices we need to tunnel our i2c commands through the EC.
+
+ The node for this device should be under a cros-ec node like
+ google,cros-ec-spi or google,cros-ec-i2c.
+
+allOf:
+ - $ref: i2c-controller.yaml#
+
+properties:
+ compatible:
+ const: google,cros-ec-i2c-tunnel
+
+ google,remote-bus:
+ description: The EC bus we'd like to talk to.
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+required:
+ - compatible
+ - google,remote-bus
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ spi0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cros-ec@0 {
+ compatible = "google,cros-ec-spi";
+ reg = <0>;
+ spi-max-frequency = <5000000>;
+
+ i2c-tunnel {
+ compatible = "google,cros-ec-i2c-tunnel";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ google,remote-bus = <0>;
+
+ battery: sbs-battery@b {
+ compatible = "sbs,sbs-battery";
+ reg = <0xb>;
+ sbs,poll-retry-count = <1>;
+ };
+ };
+ };
+ };
+++ /dev/null
-I2C bus that tunnels through the ChromeOS EC (cros-ec)
-======================================================
-On some ChromeOS board designs we've got a connection to the EC (embedded
-controller) but no direct connection to some devices on the other side of
-the EC (like a battery and PMIC). To get access to those devices we need
-to tunnel our i2c commands through the EC.
-
-The node for this device should be under a cros-ec node like google,cros-ec-spi
-or google,cros-ec-i2c.
-
-
-Required properties:
-- compatible: google,cros-ec-i2c-tunnel
-- google,remote-bus: The EC bus we'd like to talk to.
-
-Optional child nodes:
-- One node per I2C device connected to the tunnelled I2C bus.
-
-
-Example:
- cros-ec@0 {
- compatible = "google,cros-ec-spi";
-
- ...
-
- i2c-tunnel {
- compatible = "google,cros-ec-i2c-tunnel";
- #address-cells = <1>;
- #size-cells = <0>;
-
- google,remote-bus = <0>;
-
- battery: sbs-battery@b {
- compatible = "sbs,sbs-battery";
- reg = <0xb>;
- sbs,poll-retry-count = <1>;
- };
- };
- }
compatible:
oneOf:
- enum:
- - ingenic,jz4770-i2c
- - ingenic,x1000-i2c
+ - ingenic,jz4770-i2c
+ - ingenic,x1000-i2c
- items:
- - const: ingenic,jz4780-i2c
- - const: ingenic,jz4770-i2c
+ - const: ingenic,jz4780-i2c
+ - const: ingenic,jz4770-i2c
reg:
maxItems: 1
vref-supply = <&adc_vref>;
};
};
-...
\ No newline at end of file
+...
+
spi-max-frequency: true
spi-cpol: true
- spi-cpha : true
+
+ spi-cpha: true
"#io-channel-cells":
const: 1
adc-reserved-channels:
$ref: /schemas/types.yaml#/definitions/uint32
description:
- Bitmask of reserved channels, i.e. channels that cannot be
- used by the OS.
+ Bitmask of reserved channels, i.e. channels that cannot be
+ used by the OS.
clocks:
maxItems: 1
gpios:
description:
- GPIO used for controlling the reset pin
+ GPIO used for controlling the reset pin
maxItems: 1
spi-max-frequency: true
- reg
- vref-supply
+additionalProperties: false
+
examples:
- |
i2c {
- compatible
- reg
+additionalProperties: false
+
examples:
- |
i2c0 {
+++ /dev/null
-ChromeOS EC Keyboard
-
-Google's ChromeOS EC Keyboard is a simple matrix keyboard implemented on
-a separate EC (Embedded Controller) device. It provides a message for reading
-key scans from the EC. These are then converted into keycodes for processing
-by the kernel.
-
-This binding is based on matrix-keymap.txt and extends/modifies it as follows:
-
-Required properties:
-- compatible: "google,cros-ec-keyb"
-
-Optional properties:
-- google,needs-ghost-filter: True to enable a ghost filter for the matrix
-keyboard. This is recommended if the EC does not have its own logic or
-hardware for this.
-
-
-Example:
-
-cros-ec-keyb {
- compatible = "google,cros-ec-keyb";
- keypad,num-rows = <8>;
- keypad,num-columns = <13>;
- google,needs-ghost-filter;
- /*
- * Keymap entries take the form of 0xRRCCKKKK where
- * RR=Row CC=Column KKKK=Key Code
- * The values below are for a US keyboard layout and
- * are taken from the Linux driver. Note that the
- * 102ND key is not used for US keyboards.
- */
- linux,keymap = <
- /* CAPSLCK F1 B F10 */
- 0x0001003a 0x0002003b 0x00030030 0x00040044
- /* N = R_ALT ESC */
- 0x00060031 0x0008000d 0x000a0064 0x01010001
- /* F4 G F7 H */
- 0x0102003e 0x01030022 0x01040041 0x01060023
- /* ' F9 BKSPACE L_CTRL */
- 0x01080028 0x01090043 0x010b000e 0x0200001d
- /* TAB F3 T F6 */
- 0x0201000f 0x0202003d 0x02030014 0x02040040
- /* ] Y 102ND [ */
- 0x0205001b 0x02060015 0x02070056 0x0208001a
- /* F8 GRAVE F2 5 */
- 0x02090042 0x03010029 0x0302003c 0x03030006
- /* F5 6 - \ */
- 0x0304003f 0x03060007 0x0308000c 0x030b002b
- /* R_CTRL A D F */
- 0x04000061 0x0401001e 0x04020020 0x04030021
- /* S K J ; */
- 0x0404001f 0x04050025 0x04060024 0x04080027
- /* L ENTER Z C */
- 0x04090026 0x040b001c 0x0501002c 0x0502002e
- /* V X , M */
- 0x0503002f 0x0504002d 0x05050033 0x05060032
- /* L_SHIFT / . SPACE */
- 0x0507002a 0x05080035 0x05090034 0x050B0039
- /* 1 3 4 2 */
- 0x06010002 0x06020004 0x06030005 0x06040003
- /* 8 7 0 9 */
- 0x06050009 0x06060008 0x0608000b 0x0609000a
- /* L_ALT DOWN RIGHT Q */
- 0x060a0038 0x060b006c 0x060c006a 0x07010010
- /* E R W I */
- 0x07020012 0x07030013 0x07040011 0x07050017
- /* U R_SHIFT P O */
- 0x07060016 0x07070036 0x07080019 0x07090018
- /* UP LEFT */
- 0x070b0067 0x070c0069>;
-};
--- /dev/null
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+
+$id: http://devicetree.org/schemas/input/google,cros-ec-keyb.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ChromeOS EC Keyboard
+
+maintainers:
+ - Simon Glass <sjg@chromium.org>
+ - Benson Leung <bleung@chromium.org>
+ - Enric Balletbo i Serra <enric.balletbo@collabora.com>
+
+description: |
+ Google's ChromeOS EC Keyboard is a simple matrix keyboard
+ implemented on a separate EC (Embedded Controller) device. It provides
+ a message for reading key scans from the EC. These are then converted
+ into keycodes for processing by the kernel.
+
+allOf:
+ - $ref: "/schemas/input/matrix-keymap.yaml#"
+
+properties:
+ compatible:
+ const: google,cros-ec-keyb
+
+ google,needs-ghost-filter:
+ description:
+ Enable a ghost filter for the matrix keyboard. This is recommended
+ if the EC does not have its own logic or hardware for this.
+ type: boolean
+
+required:
+ - compatible
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ cros-ec-keyb {
+ compatible = "google,cros-ec-keyb";
+ keypad,num-rows = <8>;
+ keypad,num-columns = <13>;
+ google,needs-ghost-filter;
+ /*
+ * Keymap entries take the form of 0xRRCCKKKK where
+ * RR=Row CC=Column KKKK=Key Code
+ * The values below are for a US keyboard layout and
+ * are taken from the Linux driver. Note that the
+ * 102ND key is not used for US keyboards.
+ */
+ linux,keymap = <
+ /* CAPSLCK F1 B F10 */
+ 0x0001003a 0x0002003b 0x00030030 0x00040044
+ /* N = R_ALT ESC */
+ 0x00060031 0x0008000d 0x000a0064 0x01010001
+ /* F4 G F7 H */
+ 0x0102003e 0x01030022 0x01040041 0x01060023
+ /* ' F9 BKSPACE L_CTRL */
+ 0x01080028 0x01090043 0x010b000e 0x0200001d
+ /* TAB F3 T F6 */
+ 0x0201000f 0x0202003d 0x02030014 0x02040040
+ /* ] Y 102ND [ */
+ 0x0205001b 0x02060015 0x02070056 0x0208001a
+ /* F8 GRAVE F2 5 */
+ 0x02090042 0x03010029 0x0302003c 0x03030006
+ /* F5 6 - \ */
+ 0x0304003f 0x03060007 0x0308000c 0x030b002b
+ /* R_CTRL A D F */
+ 0x04000061 0x0401001e 0x04020020 0x04030021
+ /* S K J ; */
+ 0x0404001f 0x04050025 0x04060024 0x04080027
+ /* L ENTER Z C */
+ 0x04090026 0x040b001c 0x0501002c 0x0502002e
+ /* V X , M */
+ 0x0503002f 0x0504002d 0x05050033 0x05060032
+ /* L_SHIFT / . SPACE */
+ 0x0507002a 0x05080035 0x05090034 0x050B0039
+ /* 1 3 4 2 */
+ 0x06010002 0x06020004 0x06030005 0x06040003
+ /* 8 7 0 9 */
+ 0x06050009 0x06060008 0x0608000b 0x0609000a
+ /* L_ALT DOWN RIGHT Q */
+ 0x060a0038 0x060b006c 0x060c006a 0x07010010
+ /* E R W I */
+ 0x07020012 0x07030013 0x07040011 0x07050017
+ /* U R_SHIFT P O */
+ 0x07060016 0x07070036 0x07080019 0x07090018
+ /* UP LEFT */
+ 0x070b0067 0x070c0069>;
+ };
instances.
required:
- - compatible
- - reg
- - interrupts
- - interrupt-names
- - interrupt-controller
- - "#interrupt-cells"
+ - compatible
+ - reg
+ - interrupts
+ - interrupt-names
+ - interrupt-controller
+ - "#interrupt-cells"
additionalProperties: false
- ti,sci-dev-id
- ti,interrupt-ranges
+unevaluatedProperties: false
+
examples:
- |
bus {
- ti,sci-dev-id
- ti,interrupt-ranges
+unevaluatedProperties: false
+
examples:
- |
main_gpio_intr: interrupt-controller0 {
that a LED can be made so bright that it gets damaged or causes damage
due to restrictions in a specific system, such as mounting conditions.
$ref: /schemas/types.yaml#definitions/uint32
+
+additionalProperties: true
LED_COLOR_ID available, add a new one.
$ref: /schemas/types.yaml#definitions/uint32
minimum: 0
- maximum: 8
+ maximum: 9
function-enumerator:
description:
modules. This is achieved by adding multi-led nodes layer to the
monochrome LED bindings.
The nodes and properties defined in this document are unique to the multicolor
- LED class. Common LED nodes and properties are inherited from the common.txt
+ LED class. Common LED nodes and properties are inherited from the common.yaml
within this documentation directory.
patternProperties:
description: Represents the LEDs that are to be grouped.
properties:
color:
- const: 8 # LED_COLOR_ID_MULTI
description: |
- For multicolor LED support this property should be defined as
- LED_COLOR_ID_MULTI which can be found in include/linux/leds/common.h.
+ For multicolor LED support this property should be defined as either
+ LED_COLOR_ID_RGB or LED_COLOR_ID_MULTI which can be found in
+ include/linux/leds/common.h.
+ enum: [ 8, 9 ]
$ref: "common.yaml#"
vled-supply:
description: LED supply.
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
patternProperties:
'^multi-led@[0-9a-f]$':
type: object
- compatible
- reg
+additionalProperties: false
+
examples:
- |
#include <dt-bindings/gpio/gpio.h>
interrupts = <GIC_SPI 135 IRQ_TYPE_LEVEL_LOW>;
clocks = <&infracfg CLK_INFRA_GCE>;
clock-names = "gce";
- #mbox-cells = <3>;
+ #mbox-cells = <2>;
};
Example for a client device:
compatible:
items:
- enum:
- - dell,wyse-ariel-ec # Dell Wyse Ariel board (3020)
+ - dell,wyse-ariel-ec # Dell Wyse Ariel board (3020)
- const: ene,kb3930
reg:
maxItems: 1
whether this nvram is present or not.
type: boolean
+ mtk,rpmsg-name:
+ description:
+ Must be defined if the cros-ec is a rpmsg device for a Mediatek
+ ARM Cortex M4 Co-processor. Contains the name pf the rpmsg
+ device. Used to match the subnode to the rpmsg device announced by
+ the SCP.
+ $ref: "/schemas/types.yaml#/definitions/string"
+
spi-max-frequency:
description: Maximum SPI frequency of the device in Hz.
wakeup-source:
description: Button can wake-up the system.
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ typec:
+ $ref: "/schemas/chrome/google,cros-ec-typec.yaml#"
+
+ ec-pwm:
+ $ref: "/schemas/pwm/google,cros-ec-pwm.yaml#"
+
+ keyboard-controller:
+ $ref: "/schemas/input/google,cros-ec-keyb.yaml#"
+
+ codecs:
+ type: object
+ additionalProperties: false
+
+ properties:
+ '#address-cells':
+ const: 2
+
+ '#size-cells':
+ const: 1
+
+ patternProperties:
+ "^ec-codec@[a-f0-9]+$":
+ type: object
+ $ref: "/schemas/sound/google,cros-ec-codec.yaml#"
+
+ required:
+ - "#address-cells"
+ - "#size-cells"
+
+patternProperties:
+ "^i2c-tunnel[0-9]*$":
+ type: object
+ $ref: "/schemas/i2c/google,cros-ec-i2c-tunnel.yaml#"
+
+ "^regulator@[0-9]+$":
+ type: object
+ $ref: "/schemas/regulator/google,cros-ec-regulator.yaml#"
+
+ "^extcon[0-9]*$":
+ type: object
+ $ref: "/schemas/extcon/extcon-usbc-cros-ec.yaml#"
+
required:
- compatible
items:
- const: yna,cu2000-neo
- const: ingenic,x2000e
+
+additionalProperties: true
+
...
- description: Virtual Loongson64 Quad Core + VirtIO
items:
- const: loongson,loongson64v-4core-virtio
+
+additionalProperties: true
+
...
clock-output-names:
oneOf:
- items:
- - const: clk_out_sd0
- - const: clk_in_sd0
+ - const: clk_out_sd0
+ - const: clk_in_sd0
- items:
- - const: clk_out_sd1
- - const: clk_in_sd1
+ - const: clk_out_sd1
+ - const: clk_in_sd1
properties:
compatible:
- clocks
- clock-names
+unevaluatedProperties: false
+
examples:
- |
#include <dt-bindings/interrupt-controller/arm-gic.h>
%YAML 1.2
---
$id: "http://devicetree.org/schemas/mmc/sdhci-am654.yaml#"
-$schema : "http://devicetree.org/meta-schemas/core.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
title: TI AM654 MMC Controller
ti,driver-strength-ohm:
description: DLL drive strength in ohms
$ref: "/schemas/types.yaml#/definitions/uint32"
- oneOf:
- - enum:
- - 33
- - 40
- - 50
- - 66
- - 100
+ enum:
+ - 33
+ - 40
+ - 50
+ - 66
+ - 100
ti,strobe-sel:
description: strobe select delay for HS400 speed mode.
- clock-names
- ti,otap-del-sel-legacy
+unevaluatedProperties: false
+
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
- clocks
- clock-names
+unevaluatedProperties: false
+
examples:
# FIXME: Remove defines and include the correct header file
# once it is available in mainline.
required:
- reg
+unevaluatedProperties: false
+
examples:
- |
mdio0 {
reg-names:
oneOf:
- items:
- - const: dbi
- - const: dbi2
- - const: link
- - const: addr_space
+ - const: dbi
+ - const: dbi2
+ - const: link
+ - const: addr_space
- items:
- - const: dbi
- - const: dbi2
- - const: link
- - const: addr_space
- - const: atu
+ - const: dbi
+ - const: dbi2
+ - const: link
+ - const: addr_space
+ - const: atu
clocks:
maxItems: 2
clock-names:
oneOf:
- items: # for PXs2
- - const: link
+ - const: link
- items: # for others
- - const: link
- - const: phy
+ - const: link
+ - const: phy
resets:
maxItems: 2
title: OMAP USB2 PHY
maintainers:
- - Kishon Vijay Abraham I <kishon@ti.com>
- - Roger Quadros <rogerq@ti.com>
+ - Kishon Vijay Abraham I <kishon@ti.com>
+ - Roger Quadros <rogerq@ti.com>
properties:
compatible:
oneOf:
- items:
- - enum:
- - ti,dra7x-usb2
- - ti,dra7x-usb2-phy2
- - ti,am654-usb2
- - enum:
- - ti,omap-usb2
+ - enum:
+ - ti,dra7x-usb2
+ - ti,dra7x-usb2-phy2
+ - ti,am654-usb2
+ - enum:
+ - ti,omap-usb2
- items:
- - const: ti,am437x-usb2
+ - const: ti,am437x-usb2
- items:
- - const: ti,omap-usb2
+ - const: ti,omap-usb2
reg:
maxItems: 1
- clocks
- clock-names
+additionalProperties: false
+
examples:
- |
usb0_phy: phy@4100000 {
items:
oneOf:
- enum: [lcd0_d18_mfp, rmii_crs_dv_mfp, rmii_txd0_mfp,
- rmii_txd1_mfp, rmii_txen_mfp, rmii_rxen_mfp, rmii_rxd1_mfp,
- rmii_rxd0_mfp, rmii_ref_clk_mfp, i2s_d0_mfp, i2s_pcm1_mfp,
- i2s0_pcm0_mfp, i2s1_pcm0_mfp, i2s_d1_mfp, ks_in2_mfp,
- ks_in1_mfp, ks_in0_mfp, ks_in3_mfp, ks_out0_mfp,
- ks_out1_mfp, ks_out2_mfp, lvds_o_pn_mfp, dsi_dn0_mfp,
- dsi_dp2_mfp, lcd0_d17_mfp, dsi_dp3_mfp, dsi_dn3_mfp,
- dsi_dp0_mfp, lvds_ee_pn_mfp, spi0_i2c_pcm_mfp,
- spi0_i2s_pcm_mfp, dsi_dnp1_cp_mfp, lvds_e_pn_mfp,
- dsi_dn2_mfp, uart2_rtsb_mfp, uart2_ctsb_mfp, uart3_rtsb_mfp,
- uart3_ctsb_mfp, sd0_d0_mfp, sd0_d1_mfp, sd0_d2_d3_mfp,
- sd1_d0_d3_mfp, sd0_cmd_mfp, sd0_clk_mfp, sd1_cmd_mfp,
- uart0_rx_mfp, clko_25m_mfp, csi_cn_cp_mfp, sens0_ckout_mfp,
- uart0_tx_mfp, i2c0_mfp, csi_dn_dp_mfp, sen0_pclk_mfp,
- pcm1_in_mfp, pcm1_clk_mfp, pcm1_sync_mfp, pcm1_out_mfp,
- dnand_data_wr_mfp, dnand_acle_ce0_mfp, nand_ceb2_mfp,
- nand_ceb3_mfp]
+ rmii_txd1_mfp, rmii_txen_mfp, rmii_rxen_mfp, rmii_rxd1_mfp,
+ rmii_rxd0_mfp, rmii_ref_clk_mfp, i2s_d0_mfp, i2s_pcm1_mfp,
+ i2s0_pcm0_mfp, i2s1_pcm0_mfp, i2s_d1_mfp, ks_in2_mfp,
+ ks_in1_mfp, ks_in0_mfp, ks_in3_mfp, ks_out0_mfp,
+ ks_out1_mfp, ks_out2_mfp, lvds_o_pn_mfp, dsi_dn0_mfp,
+ dsi_dp2_mfp, lcd0_d17_mfp, dsi_dp3_mfp, dsi_dn3_mfp,
+ dsi_dp0_mfp, lvds_ee_pn_mfp, spi0_i2c_pcm_mfp,
+ spi0_i2s_pcm_mfp, dsi_dnp1_cp_mfp, lvds_e_pn_mfp,
+ dsi_dn2_mfp, uart2_rtsb_mfp, uart2_ctsb_mfp, uart3_rtsb_mfp,
+ uart3_ctsb_mfp, sd0_d0_mfp, sd0_d1_mfp, sd0_d2_d3_mfp,
+ sd1_d0_d3_mfp, sd0_cmd_mfp, sd0_clk_mfp, sd1_cmd_mfp,
+ uart0_rx_mfp, clko_25m_mfp, csi_cn_cp_mfp, sens0_ckout_mfp,
+ uart0_tx_mfp, i2c0_mfp, csi_dn_dp_mfp, sen0_pclk_mfp,
+ pcm1_in_mfp, pcm1_clk_mfp, pcm1_sync_mfp, pcm1_out_mfp,
+ dnand_data_wr_mfp, dnand_acle_ce0_mfp, nand_ceb2_mfp,
+ nand_ceb3_mfp]
minItems: 1
maxItems: 32
Specify the alternative function to be configured for the
given gpio pin groups.
enum: [nor, eth_rmii, eth_smii, spi0, spi1, spi2, spi3, sens0,
- sens1, uart0, uart1, uart2, uart3, uart4, uart5, uart6, i2s0,
- i2s1, pcm1, pcm0, ks, jtag, pwm0, pwm1, pwm2, pwm3, pwm4, pwm5,
- p0, sd0, sd1, sd2, i2c0, i2c1, i2c3, dsi, lvds, usb30, clko_25m,
- mipi_csi, nand, spdif, ts, lcd0]
+ sens1, uart0, uart1, uart2, uart3, uart4, uart5, uart6, i2s0,
+ i2s1, pcm1, pcm0, ks, jtag, pwm0, pwm1, pwm2, pwm3, pwm4, pwm5,
+ p0, sd0, sd1, sd2, i2c0, i2c1, i2c3, dsi, lvds, usb30, clko_25m,
+ mipi_csi, nand, spdif, ts, lcd0]
required:
- groups
items:
oneOf:
- enum: [sirq_drv, rmii_txd01_txen_drv, rmii_rxer_drv,
- rmii_crs_drv, rmii_rxd10_drv, rmii_ref_clk_drv,
- smi_mdc_mdio_drv, i2s_d0_drv, i2s_bclk0_drv, i2s3_drv,
- i2s13_drv, pcm1_drv, ks_in_drv, ks_out_drv, lvds_all_drv,
- lcd_dsi_drv, dsi_drv, sd0_d0_d3_drv, sd1_d0_d3_drv,
- sd0_cmd_drv, sd0_clk_drv, sd1_cmd_drv, sd1_clk_drv,
- spi0_all_drv, uart0_rx_drv, uart0_tx_drv, uart2_all_drv,
- i2c0_all_drv, i2c12_all_drv, sens0_pclk_drv,
- sens0_ckout_drv, uart3_all_drv]
+ rmii_crs_drv, rmii_rxd10_drv, rmii_ref_clk_drv,
+ smi_mdc_mdio_drv, i2s_d0_drv, i2s_bclk0_drv, i2s3_drv,
+ i2s13_drv, pcm1_drv, ks_in_drv, ks_out_drv, lvds_all_drv,
+ lcd_dsi_drv, dsi_drv, sd0_d0_d3_drv, sd1_d0_d3_drv,
+ sd0_cmd_drv, sd0_clk_drv, sd1_cmd_drv, sd1_clk_drv,
+ spi0_all_drv, uart0_rx_drv, uart0_tx_drv, uart2_all_drv,
+ i2c0_all_drv, i2c12_all_drv, sens0_pclk_drv,
+ sens0_ckout_drv, uart3_all_drv]
minItems: 1
maxItems: 32
items:
oneOf:
- enum: [dnand_dqs, dnand_dqsn, eth_txd0, eth_txd1, eth_txen,
- eth_rxer, eth_crs_dv, eth_rxd1, eth_rxd0, eth_ref_clk,
- eth_mdc, eth_mdio, sirq0, sirq1, sirq2, i2s_d0, i2s_bclk0,
- i2s_lrclk0, i2s_mclk0, i2s_d1, i2s_bclk1, i2s_lrclk1,
- i2s_mclk1, ks_in0, ks_in1, ks_in2, ks_in3, ks_out0, ks_out1,
- ks_out2, lvds_oep, lvds_oen, lvds_odp, lvds_odn, lvds_ocp,
- lvds_ocn, lvds_obp, lvds_obn, lvds_oap, lvds_oan, lvds_eep,
- lvds_een, lvds_edp, lvds_edn, lvds_ecp, lvds_ecn, lvds_ebp,
- lvds_ebn, lvds_eap, lvds_ean, lcd0_d18, lcd0_d17, dsi_dp3,
- dsi_dn3, dsi_dp1, dsi_dn1, dsi_cp, dsi_cn, dsi_dp0, dsi_dn0,
- dsi_dp2, dsi_dn2, sd0_d0, sd0_d1, sd0_d2, sd0_d3, sd1_d0,
- sd1_d1, sd1_d2, sd1_d3, sd0_cmd, sd0_clk, sd1_cmd, sd1_clk,
- spi0_sclk, spi0_ss, spi0_miso, spi0_mosi, uart0_rx,
- uart0_tx, i2c0_sclk, i2c0_sdata, sensor0_pclk,
- sensor0_ckout, dnand_ale, dnand_cle, dnand_ceb0, dnand_ceb1,
- dnand_ceb2, dnand_ceb3, uart2_rx, uart2_tx, uart2_rtsb,
- uart2_ctsb, uart3_rx, uart3_tx, uart3_rtsb, uart3_ctsb,
- pcm1_in, pcm1_clk, pcm1_sync, pcm1_out, i2c1_sclk,
- i2c1_sdata, i2c2_sclk, i2c2_sdata, csi_dn0, csi_dp0,
- csi_dn1, csi_dp1, csi_dn2, csi_dp2, csi_dn3, csi_dp3,
- csi_cn, csi_cp, dnand_d0, dnand_d1, dnand_d2, dnand_d3,
- dnand_d4, dnand_d5, dnand_d6, dnand_d7, dnand_rb, dnand_rdb,
- dnand_rdbn, dnand_wrb, porb, clko_25m, bsel, pkg0, pkg1,
- pkg2, pkg3]
+ eth_rxer, eth_crs_dv, eth_rxd1, eth_rxd0, eth_ref_clk,
+ eth_mdc, eth_mdio, sirq0, sirq1, sirq2, i2s_d0, i2s_bclk0,
+ i2s_lrclk0, i2s_mclk0, i2s_d1, i2s_bclk1, i2s_lrclk1,
+ i2s_mclk1, ks_in0, ks_in1, ks_in2, ks_in3, ks_out0, ks_out1,
+ ks_out2, lvds_oep, lvds_oen, lvds_odp, lvds_odn, lvds_ocp,
+ lvds_ocn, lvds_obp, lvds_obn, lvds_oap, lvds_oan, lvds_eep,
+ lvds_een, lvds_edp, lvds_edn, lvds_ecp, lvds_ecn, lvds_ebp,
+ lvds_ebn, lvds_eap, lvds_ean, lcd0_d18, lcd0_d17, dsi_dp3,
+ dsi_dn3, dsi_dp1, dsi_dn1, dsi_cp, dsi_cn, dsi_dp0, dsi_dn0,
+ dsi_dp2, dsi_dn2, sd0_d0, sd0_d1, sd0_d2, sd0_d3, sd1_d0,
+ sd1_d1, sd1_d2, sd1_d3, sd0_cmd, sd0_clk, sd1_cmd, sd1_clk,
+ spi0_sclk, spi0_ss, spi0_miso, spi0_mosi, uart0_rx,
+ uart0_tx, i2c0_sclk, i2c0_sdata, sensor0_pclk,
+ sensor0_ckout, dnand_ale, dnand_cle, dnand_ceb0, dnand_ceb1,
+ dnand_ceb2, dnand_ceb3, uart2_rx, uart2_tx, uart2_rtsb,
+ uart2_ctsb, uart3_rx, uart3_tx, uart3_rtsb, uart3_ctsb,
+ pcm1_in, pcm1_clk, pcm1_sync, pcm1_out, i2c1_sclk,
+ i2c1_sdata, i2c2_sclk, i2c2_sdata, csi_dn0, csi_dp0,
+ csi_dn1, csi_dp1, csi_dn2, csi_dp2, csi_dn3, csi_dp3,
+ csi_cn, csi_cp, dnand_d0, dnand_d1, dnand_d2, dnand_d3,
+ dnand_d4, dnand_d5, dnand_d6, dnand_d7, dnand_rb, dnand_rdb,
+ dnand_rdbn, dnand_wrb, porb, clko_25m, bsel, pkg0, pkg1,
+ pkg2, pkg3]
minItems: 1
maxItems: 64
required:
- pinmux
- additionalProperties: false
+ additionalProperties: false
required:
- compatible
Specify the alternative function to be configured for the specified
pins. Functions are only valid for gpio pins.
enum: [ gpio, cci_i2c0, blsp_uim1, blsp_uim2, blsp_uim3, blsp_uim5,
- blsp_i2c1, blsp_i2c2, blsp_i2c3, blsp_i2c5, blsp_spi1,
- blsp_spi2, blsp_spi3, blsp_spi5, blsp_uart1, blsp_uart2,
- blsp_uart3, blsp_uart5, cam_mclk0, cam_mclk1, wlan ]
+ blsp_i2c1, blsp_i2c2, blsp_i2c3, blsp_i2c5, blsp_spi1,
+ blsp_spi2, blsp_spi3, blsp_spi5, blsp_uart1, blsp_uart2,
+ blsp_uart3, blsp_uart5, cam_mclk0, cam_mclk1, wlan ]
drive-strength:
enum: [2, 4, 6, 8, 10, 12, 14, 16]
Function to mux.
$ref: "/schemas/types.yaml#/definitions/string"
enum: [i2c0, i2c1, i2c2, i2c3, i2c4, i2c5, i2c6, i2c7, i2c8,
- spi0, spi1, spi2, spi3, spi4, spi5, spi6,
- uart0, uart1, uart2, uart3, pwm, pcmif_out, pcmif_in]
+ spi0, spi1, spi2, spi3, spi4, spi5, spi6,
+ uart0, uart1, uart2, uart3, pwm, pcmif_out, pcmif_in]
groups:
description:
Name of the pin group to use for the functions.
$ref: "/schemas/types.yaml#/definitions/string"
enum: [i2c0_grp, i2c1_grp, i2c2_grp, i2c3_grp, i2c4_grp,
- i2c5_grp, i2c6_grp, i2c7_grp, i2c8_grp,
- spi0_grp, spi0_cs0_grp, spi0_cs1_grp, spi0_cs2_grp,
- spi1_grp, spi2_grp, spi3_grp, spi4_grp, spi5_grp, spi6_grp,
- uart0_grp, uart1_grp, uart2_grp, uart3_grp,
- pwm0_gpio4_grp, pwm0_gpio8_grp, pwm0_gpio12_grp,
- pwm0_gpio16_grp, pwm1_gpio5_grp, pwm1_gpio9_grp,
- pwm1_gpio13_grp, pwm1_gpio17_grp, pwm2_gpio6_grp,
- pwm2_gpio10_grp, pwm2_gpio14_grp, pwm2_gpio18_grp,
- pwm3_gpio7_grp, pwm3_gpio11_grp, pwm3_gpio15_grp,
- pwm3_gpio19_grp, pcmif_out_grp, pcmif_in_grp]
+ i2c5_grp, i2c6_grp, i2c7_grp, i2c8_grp,
+ spi0_grp, spi0_cs0_grp, spi0_cs1_grp, spi0_cs2_grp,
+ spi1_grp, spi2_grp, spi3_grp, spi4_grp, spi5_grp, spi6_grp,
+ uart0_grp, uart1_grp, uart2_grp, uart3_grp,
+ pwm0_gpio4_grp, pwm0_gpio8_grp, pwm0_gpio12_grp,
+ pwm0_gpio16_grp, pwm1_gpio5_grp, pwm1_gpio9_grp,
+ pwm1_gpio13_grp, pwm1_gpio17_grp, pwm2_gpio6_grp,
+ pwm2_gpio10_grp, pwm2_gpio14_grp, pwm2_gpio18_grp,
+ pwm3_gpio7_grp, pwm3_gpio11_grp, pwm3_gpio15_grp,
+ pwm3_gpio19_grp, pcmif_out_grp, pcmif_in_grp]
drive-strength:
enum: [2, 4, 6, 8, 16, 24, 32]
properties:
mode-normal:
- $ref: /schemas/types.yaml#/definitions/uint32
- description: |
- Default value to set on a reboot if no command was provided.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ Default value to set on a reboot if no command was provided.
patternProperties:
"^mode-.*$":
$ref: /schemas/types.yaml#/definitions/uint32
+additionalProperties: false
+
examples:
- |
reboot-mode {
oneOf:
- const: ingenic,jz4740-battery
- items:
- - enum:
- - ingenic,jz4725b-battery
- - ingenic,jz4770-battery
- - const: ingenic,jz4740-battery
+ - enum:
+ - ingenic,jz4725b-battery
+ - ingenic,jz4770-battery
+ - const: ingenic,jz4740-battery
io-channels:
maxItems: 1
then:
properties:
summit,mains-current-limit-microamp:
- enum: [ 300000, 500000, 700000, 1000000,
- 1500000, 1800000, 2000000]
+ enum: [ 300000, 500000, 700000, 1000000,
+ 1500000, 1800000, 2000000]
summit,usb-current-limit-microamp:
- enum: [ 300000, 500000, 700000, 1000000,
- 1500000, 1800000, 2000000]
+ enum: [ 300000, 500000, 700000, 1000000,
+ 1500000, 1800000, 2000000]
summit,charge-current-compensation-microamp:
enum: [200000, 450000, 600000, 900000]
else:
properties:
summit,mains-current-limit-microamp:
- enum: [ 300000, 500000, 700000, 900000, 1200000,
- 1500000, 1800000, 2000000, 2200000, 2500000]
+ enum: [ 300000, 500000, 700000, 900000, 1200000,
+ 1500000, 1800000, 2000000, 2200000, 2500000]
summit,usb-current-limit-microamp:
- enum: [ 300000, 500000, 700000, 900000, 1200000,
- 1500000, 1800000, 2000000, 2200000, 2500000]
+ enum: [ 300000, 500000, 700000, 900000, 1200000,
+ 1500000, 1800000, 2000000, 2200000, 2500000]
summit,charge-current-compensation-microamp:
enum: [250000, 700000, 900000, 1200000]
- enable-gpios
- mps,fb-voltage-divider
+unevaluatedProperties: false
+
examples:
- |
#include <dt-bindings/gpio/gpio.h>
- compatible
- reg
+additionalProperties: false
+
examples:
- |
i2c {
properties:
compatible:
items:
- - enum:
- - sifive,fu540-c000-ccache
+ - enum:
+ - sifive,fu540-c000-ccache
required:
- compatible
- sifive,hifive-unleashed-a00
- const: sifive,fu540-c000
- const: sifive,fu540
+
+additionalProperties: true
+
...
- const: fsl,imx21-rnga
- items:
- enum:
- - fsl,imx6sl-rngb
- - fsl,imx6sll-rngb
- - fsl,imx6ull-rngb
+ - fsl,imx6sl-rngb
+ - fsl,imx6sll-rngb
+ - fsl,imx6ull-rngb
- const: fsl,imx25-rngb
- const: fsl,imx35-rngc
- const: fsl,imx21-uart
- items:
- enum:
- - fsl,imx25-uart
- - fsl,imx27-uart
- - fsl,imx31-uart
- - fsl,imx35-uart
- - fsl,imx50-uart
- - fsl,imx51-uart
- - fsl,imx53-uart
- - fsl,imx6q-uart
+ - fsl,imx25-uart
+ - fsl,imx27-uart
+ - fsl,imx31-uart
+ - fsl,imx35-uart
+ - fsl,imx50-uart
+ - fsl,imx51-uart
+ - fsl,imx53-uart
+ - fsl,imx6q-uart
- const: fsl,imx21-uart
- items:
- enum:
- - fsl,imx6sl-uart
- - fsl,imx6sll-uart
- - fsl,imx6sx-uart
+ - fsl,imx6sl-uart
+ - fsl,imx6sll-uart
+ - fsl,imx6sx-uart
- const: fsl,imx6q-uart
- const: fsl,imx21-uart
- items:
- enum:
- - fsl,imx6ul-uart
- - fsl,imx7d-uart
- - fsl,imx8mm-uart
- - fsl,imx8mn-uart
- - fsl,imx8mp-uart
- - fsl,imx8mq-uart
+ - fsl,imx6ul-uart
+ - fsl,imx7d-uart
+ - fsl,imx8mm-uart
+ - fsl,imx8mn-uart
+ - fsl,imx8mp-uart
+ - fsl,imx8mq-uart
- const: fsl,imx6q-uart
reg:
description: |
Google's ChromeOS EC codec is a digital mic codec provided by the
- Embedded Controller (EC) and is controlled via a host-command interface.
- An EC codec node should only be found as a sub-node of the EC node (see
- Documentation/devicetree/bindings/mfd/google,cros-ec.yaml).
+ Embedded Controller (EC) and is controlled via a host-command
+ interface. An EC codec node should only be found inside the "codecs"
+ subnode of a cros-ec node.
+ (see Documentation/devicetree/bindings/mfd/google,cros-ec.yaml).
properties:
compatible:
#size-cells = <0>;
cros-ec@0 {
compatible = "google,cros-ec-spi";
- #address-cells = <2>;
- #size-cells = <1>;
reg = <0>;
- cros_ec_codec: ec-codec@10500000 {
- compatible = "google,cros-ec-codec";
- #sound-dai-cells = <1>;
- reg = <0x0 0x10500000 0x80000>;
- memory-region = <&reserved_mem>;
+
+ codecs {
+ #address-cells = <2>;
+ #size-cells = <1>;
+
+ cros_ec_codec: ec-codec@10500000 {
+ compatible = "google,cros-ec-codec";
+ #sound-dai-cells = <1>;
+ reg = <0x0 0x10500000 0x80000>;
+ memory-region = <&reserved_mem>;
+ };
+
};
};
};
- Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
description:
- The Microchip Sony/Philips Digital Interface Receiver is a
- serial port compliant with the IEC-60958 standard.
+ The Microchip Sony/Philips Digital Interface Receiver is a serial port
+ compliant with the IEC-60958 standard.
properties:
"#sound-dai-cells":
- Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
description:
- The Microchip Sony/Philips Digital Interface Transmitter is a
- serial port compliant with the IEC-60958 standard.
+ The Microchip Sony/Philips Digital Interface Transmitter is a serial port
+ compliant with the IEC-60958 standard.
properties:
"#sound-dai-cells":
reg:
maxItems: 2
description: LPAIF core registers
+
reg-names:
- maxItems: 2
+ maxItems: 2
+
clocks:
minItems: 3
maxItems: 6
interrupts:
maxItems: 2
description: LPAIF DMA buffer interrupt
+
interrupt-names:
maxItems: 2
+
qcom,adsp:
$ref: /schemas/types.yaml#/definitions/phandle
description: Phandle for the audio DSP node
properties:
clock-names:
oneOf:
- - items: #for I2S
- - const: pcnoc-sway-clk
- - const: audio-core
- - const: mclk0
- - const: pcnoc-mport-clk
- - const: mi2s-bit-clk0
- - const: mi2s-bit-clk1
- - items: #for HDMI
- - const: pcnoc-sway-clk
- - const: audio-core
- - const: pcnoc-mport-clk
+ - items: #for I2S
+ - const: pcnoc-sway-clk
+ - const: audio-core
+ - const: mclk0
+ - const: pcnoc-mport-clk
+ - const: mi2s-bit-clk0
+ - const: mi2s-bit-clk1
+ - items: #for HDMI
+ - const: pcnoc-sway-clk
+ - const: audio-core
+ - const: pcnoc-mport-clk
reg-names:
anyOf:
- items: #for I2S
- - const: lpass-lpaif
+ - const: lpass-lpaif
- items: #for I2S and HDMI
- - const: lpass-hdmiif
- - const: lpass-lpaif
+ - const: lpass-hdmiif
+ - const: lpass-lpaif
interrupt-names:
anyOf:
- items: #for I2S
- - const: lpass-irq-lpaif
+ - const: lpass-irq-lpaif
- items: #for I2S and HDMI
- - const: lpass-irq-lpaif
- - const: lpass-irq-hdmi
+ - const: lpass-irq-lpaif
+ - const: lpass-irq-hdmi
required:
- iommus
- power-domains
required:
- compatible
+additionalProperties: false
+
examples:
- |
#include <dt-bindings/gpio/gpio.h>
- const: allwinner,sun4i-a10-system-control
- const: allwinner,sun8i-a23-system-control
- const: allwinner,sun8i-h3-system-control
+ - items:
+ - const: allwinner,sun8i-v3s-system-control
+ - const: allwinner,sun8i-h3-system-control
- items:
- const: allwinner,sun8i-r40-system-control
- const: allwinner,sun4i-a10-system-control
compatible:
items:
- enum:
- - arm,sp804
- - hisilicon,sp804
+ - arm,sp804
+ - hisilicon,sp804
- const: arm,primecell
interrupts:
clock is used for all clock inputs.
oneOf:
- items:
- - description: clock for timer 1
- - description: clock for timer 2
- - description: bus clock
+ - description: clock for timer 1
+ - description: clock for timer 2
+ - description: bus clock
- items:
- - description: unified clock for both timers and the bus
+ - description: unified clock for both timers and the bus
clock-names: true
# The original binding did not specify any clock names, and there is no
enum: [super-speed, high-speed, full-speed]
phys:
- minItems: 1
- maxItems: 2
+ minItems: 1
+ maxItems: 2
phy-names:
minItems: 1
properties:
compatible:
- const: ti,hd3ss3220
+ const: ti,hd3ss3220
reg:
maxItems: 1
- const: fsl,imx21-owire
- items:
- enum:
- - fsl,imx27-owire
- - fsl,imx50-owire
- - fsl,imx51-owire
- - fsl,imx53-owire
+ - fsl,imx27-owire
+ - fsl,imx50-owire
+ - fsl,imx51-owire
+ - fsl,imx53-owire
- const: fsl,imx21-owire
reg:
There is a helper function to create device related seq_file::
- struct dentry *debugfs_create_devm_seqfile(struct device *dev,
+ void debugfs_create_devm_seqfile(struct device *dev,
const char *name,
struct dentry *parent,
int (*read_fn)(struct seq_file *s,
uleds
leds-blinkm
+ leds-el15203000
leds-lm3556
leds-lp3944
leds-lp5521
--- /dev/null
+.. SPDX-License-Identifier: GPL-2.0
+
+==================================
+Kernel driver for Crane EL15203000
+==================================
+
+/sys/class/leds/<led>/hw_pattern
+--------------------------------
+
+Specify a hardware pattern for the EL15203000 LED.
+
+The LEDs board supports only predefined patterns by firmware
+for specific LEDs.
+
+Breathing mode for Screen frame light tube::
+
+ "0 4000 1 4000"
+
+ ^
+ |
+ Max-| ---
+ | / \
+ | / \
+ | / \ /
+ | / \ /
+ Min-|- ---
+ |
+ 0------4------8--> time (sec)
+
+Cascade mode for Pipe LED::
+
+ "1 800 2 800 4 800 8 800 16 800"
+
+ ^
+ |
+ 0 On -|----+ +----+ +---
+ | | | | |
+ Off-| +-------------------+ +-------------------+
+ |
+ 1 On -| +----+ +----+
+ | | | | |
+ Off |----+ +-------------------+ +------------------
+ |
+ 2 On -| +----+ +----+
+ | | | | |
+ Off-|---------+ +-------------------+ +-------------
+ |
+ 3 On -| +----+ +----+
+ | | | | |
+ Off-|--------------+ +-------------------+ +--------
+ |
+ 4 On -| +----+ +----+
+ | | | | |
+ Off-|-------------------+ +-------------------+ +---
+ |
+ 0---0.8--1.6--2.4--3.2---4---4.8--5.6--6.4--7.2---8--> time (sec)
+
+Inverted cascade mode for Pipe LED::
+
+ "30 800 29 800 27 800 23 800 15 800"
+
+ ^
+ |
+ 0 On -| +-------------------+ +-------------------+
+ | | | | |
+ Off-|----+ +----+ +---
+ |
+ 1 On -|----+ +-------------------+ +------------------
+ | | | | |
+ Off | +----+ +----+
+ |
+ 2 On -|---------+ +-------------------+ +-------------
+ | | | | |
+ Off-| +----+ +----+
+ |
+ 3 On -|--------------+ +-------------------+ +--------
+ | | | | |
+ Off-| +----+ +----+
+ |
+ 4 On -|-------------------+ +-------------------+ +---
+ | | | | |
+ Off-| +----+ +----+
+ |
+ 0---0.8--1.6--2.4--3.2---4---4.8--5.6--6.4--7.2---8--> time (sec)
+
+Bounce mode for Pipe LED::
+
+ "1 800 2 800 4 800 8 800 16 800 16 800 8 800 4 800 2 800 1 800"
+
+ ^
+ |
+ 0 On -|----+ +--------
+ | | |
+ Off-| +---------------------------------------+
+ |
+ 1 On -| +----+ +----+
+ | | | | |
+ Off |----+ +-----------------------------+ +--------
+ |
+ 2 On -| +----+ +----+
+ | | | | |
+ Off-|---------+ +-------------------+ +-------------
+ |
+ 3 On -| +----+ +----+
+ | | | | |
+ Off-|--------------+ +---------+ +------------------
+ |
+ 4 On -| +---------+
+ | | |
+ Off-|-------------------+ +-----------------------
+ |
+ 0---0.8--1.6--2.4--3.2---4---4.8--5.6--6.4--7.2---8--> time (sec)
+
+Inverted bounce mode for Pipe LED::
+
+ "30 800 29 800 27 800 23 800 15 800 15 800 23 800 27 800 29 800 30 800"
+
+ ^
+ |
+ 0 On -| +---------------------------------------+
+ | | |
+ Off-|----+ +--------
+ |
+ 1 On -|----+ +-----------------------------+ +--------
+ | | | | |
+ Off | +----+ +----+
+ |
+ 2 On -|---------+ +-------------------+ +-------------
+ | | | | |
+ Off-| +----+ +----+
+ |
+ 3 On -|--------------+ +---------+ +------------------
+ | | | | |
+ Off-| +----+ +----+
+ |
+ 4 On -|-------------------+ +-----------------------
+ | | |
+ Off-| +---------+
+ |
+ 0---0.8--1.6--2.4--3.2---4---4.8--5.6--6.4--7.2---8--> time (sec)
--- /dev/null
+.. SPDX-License-Identifier: GPL-2.0
+
+===================================
+Kernel driver for Spreadtrum SC27XX
+===================================
+
+/sys/class/leds/<led>/hw_pattern
+--------------------------------
+
+Specify a hardware pattern for the SC27XX LED. For the SC27XX
+LED controller, it only supports 4 stages to make a single
+hardware pattern, which is used to configure the rise time,
+high time, fall time and low time for the breathing mode.
+
+For the breathing mode, the SC27XX LED only expects one brightness
+for the high stage. To be compatible with the hardware pattern
+format, we should set brightness as 0 for rise stage, fall
+stage and low stage.
+
+- Min stage duration: 125 ms
+- Max stage duration: 31875 ms
+
+Since the stage duration step is 125 ms, the duration should be
+a multiplier of 125, like 125ms, 250ms, 375ms, 500ms ... 31875ms.
+
+Thus the format of the hardware pattern values should be:
+"0 rise_duration brightness high_duration 0 fall_duration 0 low_duration".
+++ /dev/null
-=============================================
-Intel Many Integrated Core (MIC) architecture
-=============================================
-
-.. toctree::
- :maxdepth: 1
-
- mic_overview
- scif_overview
-
-.. only:: subproject and html
-
- Indices
- =======
-
- * :ref:`genindex`
+++ /dev/null
-======================================================
-Intel Many Integrated Core (MIC) architecture overview
-======================================================
-
-An Intel MIC X100 device is a PCIe form factor add-in coprocessor
-card based on the Intel Many Integrated Core (MIC) architecture
-that runs a Linux OS. It is a PCIe endpoint in a platform and therefore
-implements the three required standard address spaces i.e. configuration,
-memory and I/O. The host OS loads a device driver as is typical for
-PCIe devices. The card itself runs a bootstrap after reset that
-transfers control to the card OS downloaded from the host driver. The
-host driver supports OSPM suspend and resume operations. It shuts down
-the card during suspend and reboots the card OS during resume.
-The card OS as shipped by Intel is a Linux kernel with modifications
-for the X100 devices.
-
-Since it is a PCIe card, it does not have the ability to host hardware
-devices for networking, storage and console. We provide these devices
-on X100 coprocessors thus enabling a self-bootable equivalent
-environment for applications. A key benefit of our solution is that it
-leverages the standard virtio framework for network, disk and console
-devices, though in our case the virtio framework is used across a PCIe
-bus. A Virtio Over PCIe (VOP) driver allows creating user space
-backends or devices on the host which are used to probe virtio drivers
-for these devices on the MIC card. The existing VRINGH infrastructure
-in the kernel is used to access virtio rings from the host. The card
-VOP driver allows card virtio drivers to communicate with their user
-space backends on the host via a device page. Ring 3 apps on the host
-can add, remove and configure virtio devices. A thin MIC specific
-virtio_config_ops is implemented which is borrowed heavily from
-previous similar implementations in lguest and s390.
-
-MIC PCIe card has a dma controller with 8 channels. These channels are
-shared between the host s/w and the card s/w. 0 to 3 are used by host
-and 4 to 7 by card. As the dma device doesn't show up as PCIe device,
-a virtual bus called mic bus is created and virtual dma devices are
-created on it by the host/card drivers. On host the channels are private
-and used only by the host driver to transfer data for the virtio devices.
-
-The Symmetric Communication Interface (SCIF (pronounced as skiff)) is a
-low level communications API across PCIe currently implemented for MIC.
-More details are available at scif_overview.txt.
-
-The Coprocessor State Management (COSM) driver on the host allows for
-boot, shutdown and reset of Intel MIC devices. It communicates with a COSM
-"client" driver on the MIC cards over SCIF to perform these functions.
-
-Here is a block diagram of the various components described above. The
-virtio backends are situated on the host rather than the card given better
-single threaded performance for the host compared to MIC, the ability of
-the host to initiate DMA's to/from the card using the MIC DMA engine and
-the fact that the virtio block storage backend can only be on the host::
-
- +----------+ | +----------+
- | Card OS | | | Host OS |
- +----------+ | +----------+
- |
- +-------+ +--------+ +------+ | +---------+ +--------+ +--------+
- | Virtio| |Virtio | |Virtio| | |Virtio | |Virtio | |Virtio |
- | Net | |Console | |Block | | |Net | |Console | |Block |
- | Driver| |Driver | |Driver| | |backend | |backend | |backend |
- +---+---+ +---+----+ +--+---+ | +---------+ +----+---+ +--------+
- | | | | | | |
- | | | |User | | |
- | | | |------|------------|--+------|-------
- +---------+---------+ |Kernel |
- | | |
- +---------+ +---+----+ +------+ | +------+ +------+ +--+---+ +-------+
- |MIC DMA | | VOP | | SCIF | | | SCIF | | COSM | | VOP | |MIC DMA|
- +---+-----+ +---+----+ +--+---+ | +--+---+ +--+---+ +------+ +----+--+
- | | | | | | |
- +---+-----+ +---+----+ +--+---+ | +--+---+ +--+---+ +------+ +----+--+
- |MIC | | VOP | |SCIF | | |SCIF | | COSM | | VOP | | MIC |
- |HW Bus | | HW Bus| |HW Bus| | |HW Bus| | Bus | |HW Bus| |HW Bus |
- +---------+ +--------+ +--+---+ | +--+---+ +------+ +------+ +-------+
- | | | | | | |
- | +-----------+--+ | | | +---------------+ |
- | |Intel MIC | | | | |Intel MIC | |
- | |Card Driver | | | | |Host Driver | |
- +---+--------------+------+ | +----+---------------+-----+
- | | |
- +-------------------------------------------------------------+
- | |
- | PCIe Bus |
- +-------------------------------------------------------------+
+++ /dev/null
-========================================
-Symmetric Communication Interface (SCIF)
-========================================
-
-The Symmetric Communication Interface (SCIF (pronounced as skiff)) is a low
-level communications API across PCIe currently implemented for MIC. Currently
-SCIF provides inter-node communication within a single host platform, where a
-node is a MIC Coprocessor or Xeon based host. SCIF abstracts the details of
-communicating over the PCIe bus while providing an API that is symmetric
-across all the nodes in the PCIe network. An important design objective for SCIF
-is to deliver the maximum possible performance given the communication
-abilities of the hardware. SCIF has been used to implement an offload compiler
-runtime and OFED support for MPI implementations for MIC coprocessors.
-
-SCIF API Components
-===================
-
-The SCIF API has the following parts:
-
-1. Connection establishment using a client server model
-2. Byte stream messaging intended for short messages
-3. Node enumeration to determine online nodes
-4. Poll semantics for detection of incoming connections and messages
-5. Memory registration to pin down pages
-6. Remote memory mapping for low latency CPU accesses via mmap
-7. Remote DMA (RDMA) for high bandwidth DMA transfers
-8. Fence APIs for RDMA synchronization
-
-SCIF exposes the notion of a connection which can be used by peer processes on
-nodes in a SCIF PCIe "network" to share memory "windows" and to communicate. A
-process in a SCIF node initiates a SCIF connection to a peer process on a
-different node via a SCIF "endpoint". SCIF endpoints support messaging APIs
-which are similar to connection oriented socket APIs. Connected SCIF endpoints
-can also register local memory which is followed by data transfer using either
-DMA, CPU copies or remote memory mapping via mmap. SCIF supports both user and
-kernel mode clients which are functionally equivalent.
-
-SCIF Performance for MIC
-========================
-
-DMA bandwidth comparison between the TCP (over ethernet over PCIe) stack versus
-SCIF shows the performance advantages of SCIF for HPC applications and
-runtimes::
-
- Comparison of TCP and SCIF based BW
-
- Throughput (GB/sec)
- 8 + PCIe Bandwidth ******
- + TCP ######
- 7 + ************************************** SCIF %%%%%%
- | %%%%%%%%%%%%%%%%%%%
- 6 + %%%%
- | %%
- | %%%
- 5 + %%
- | %%
- 4 + %%
- | %%
- 3 + %%
- | %
- 2 + %%
- | %%
- | %
- 1 +
- + ######################################
- 0 +++---+++--+--+-+--+--+-++-+--+-++-+--+-++-+-
- 1 10 100 1000 10000 100000
- Transfer Size (KBytes)
-
-SCIF allows memory sharing via mmap(..) between processes on different PCIe
-nodes and thus provides bare-metal PCIe latency. The round trip SCIF mmap
-latency from the host to an x100 MIC for an 8 byte message is 0.44 usecs.
-
-SCIF has a user space library which is a thin IOCTL wrapper providing a user
-space API similar to the kernel API in scif.h. The SCIF user space library
-is distributed @ https://software.intel.com/en-us/mic-developer
-
-Here is some pseudo code for an example of how two applications on two PCIe
-nodes would typically use the SCIF API::
-
- Process A (on node A) Process B (on node B)
-
- /* get online node information */
- scif_get_node_ids(..) scif_get_node_ids(..)
- scif_open(..) scif_open(..)
- scif_bind(..) scif_bind(..)
- scif_listen(..)
- scif_accept(..) scif_connect(..)
- /* SCIF connection established */
-
- /* Send and receive short messages */
- scif_send(..)/scif_recv(..) scif_send(..)/scif_recv(..)
-
- /* Register memory */
- scif_register(..) scif_register(..)
-
- /* RDMA */
- scif_readfrom(..)/scif_writeto(..) scif_readfrom(..)/scif_writeto(..)
-
- /* Fence DMAs */
- scif_fence_signal(..) scif_fence_signal(..)
-
- mmap(..) mmap(..)
-
- /* Access remote registered memory */
-
- /* Close the endpoints */
- scif_close(..) scif_close(..)
--- /dev/null
+# -*- coding: utf-8; mode: python -*-
+# coding=utf-8
+# SPDX-License-Identifier: GPL-2.0
+#
+u"""
+ kernel-abi
+ ~~~~~~~~~~
+
+ Implementation of the ``kernel-abi`` reST-directive.
+
+ :copyright: Copyright (C) 2016 Markus Heiser
+ :copyright: Copyright (C) 2016-2020 Mauro Carvalho Chehab
+ :maintained-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
+ :license: GPL Version 2, June 1991 see Linux/COPYING for details.
+
+ The ``kernel-abi`` (:py:class:`KernelCmd`) directive calls the
+ scripts/get_abi.pl script to parse the Kernel ABI files.
+
+ Overview of directive's argument and options.
+
+ .. code-block:: rst
+
+ .. kernel-abi:: <ABI directory location>
+ :debug:
+
+ The argument ``<ABI directory location>`` is required. It contains the
+ location of the ABI files to be parsed.
+
+ ``debug``
+ Inserts a code-block with the *raw* reST. Sometimes it is helpful to see
+ what reST is generated.
+
+"""
+
+import codecs
+import os
+import subprocess
+import sys
+import re
+import kernellog
+
+from os import path
+
+from docutils import nodes, statemachine
+from docutils.statemachine import ViewList
+from docutils.parsers.rst import directives, Directive
+from docutils.utils.error_reporting import ErrorString
+
+#
+# AutodocReporter is only good up to Sphinx 1.7
+#
+import sphinx
+
+Use_SSI = sphinx.__version__[:3] >= '1.7'
+if Use_SSI:
+ from sphinx.util.docutils import switch_source_input
+else:
+ from sphinx.ext.autodoc import AutodocReporter
+
+__version__ = '1.0'
+
+def setup(app):
+
+ app.add_directive("kernel-abi", KernelCmd)
+ return dict(
+ version = __version__
+ , parallel_read_safe = True
+ , parallel_write_safe = True
+ )
+
+class KernelCmd(Directive):
+
+ u"""KernelABI (``kernel-abi``) directive"""
+
+ required_arguments = 1
+ optional_arguments = 2
+ has_content = False
+ final_argument_whitespace = True
+
+ option_spec = {
+ "debug" : directives.flag,
+ "rst" : directives.unchanged
+ }
+
+ def run(self):
+
+ doc = self.state.document
+ if not doc.settings.file_insertion_enabled:
+ raise self.warning("docutils: file insertion disabled")
+
+ env = doc.settings.env
+ cwd = path.dirname(doc.current_source)
+ cmd = "get_abi.pl rest --enable-lineno --dir "
+ cmd += self.arguments[0]
+
+ if 'rst' in self.options:
+ cmd += " --rst-source"
+
+ srctree = path.abspath(os.environ["srctree"])
+
+ fname = cmd
+
+ # extend PATH with $(srctree)/scripts
+ path_env = os.pathsep.join([
+ srctree + os.sep + "scripts",
+ os.environ["PATH"]
+ ])
+ shell_env = os.environ.copy()
+ shell_env["PATH"] = path_env
+ shell_env["srctree"] = srctree
+
+ lines = self.runCmd(cmd, shell=True, cwd=cwd, env=shell_env)
+ nodeList = self.nestedParse(lines, self.arguments[0])
+ return nodeList
+
+ def runCmd(self, cmd, **kwargs):
+ u"""Run command ``cmd`` and return it's stdout as unicode."""
+
+ try:
+ proc = subprocess.Popen(
+ cmd
+ , stdout = subprocess.PIPE
+ , stderr = subprocess.PIPE
+ , **kwargs
+ )
+ out, err = proc.communicate()
+
+ out, err = codecs.decode(out, 'utf-8'), codecs.decode(err, 'utf-8')
+
+ if proc.returncode != 0:
+ raise self.severe(
+ u"command '%s' failed with return code %d"
+ % (cmd, proc.returncode)
+ )
+ except OSError as exc:
+ raise self.severe(u"problems with '%s' directive: %s."
+ % (self.name, ErrorString(exc)))
+ return out
+
+ def nestedParse(self, lines, fname):
+ content = ViewList()
+ node = nodes.section()
+
+ if "debug" in self.options:
+ code_block = "\n\n.. code-block:: rst\n :linenos:\n"
+ for l in lines.split("\n"):
+ code_block += "\n " + l
+ lines = code_block + "\n\n"
+
+ line_regex = re.compile("^#define LINENO (\S+)\#([0-9]+)$")
+ ln = 0
+ n = 0
+ f = fname
+
+ for line in lines.split("\n"):
+ n = n + 1
+ match = line_regex.search(line)
+ if match:
+ new_f = match.group(1)
+
+ # Sphinx parser is lazy: it stops parsing contents in the
+ # middle, if it is too big. So, handle it per input file
+ if new_f != f and content:
+ self.do_parse(content, node)
+ content = ViewList()
+
+ f = new_f
+
+ # sphinx counts lines from 0
+ ln = int(match.group(2)) - 1
+ else:
+ content.append(line, f, ln)
+
+ kernellog.info(self.state.document.settings.env.app, "%s: parsed %i lines" % (fname, n))
+
+ if content:
+ self.do_parse(content, node)
+
+ return node.children
+
+ def do_parse(self, content, node):
+ if Use_SSI:
+ with switch_source_input(self.state, content):
+ self.state.nested_parse(content, 0, node, match_titles=1)
+ else:
+ buf = self.state.memo.title_styles, self.state.memo.section_level, self.state.memo.reporter
+
+ self.state.memo.title_styles = []
+ self.state.memo.section_level = 0
+ self.state.memo.reporter = AutodocReporter(content, self.state.memo.reporter)
+ try:
+ self.state.nested_parse(content, 0, node, match_titles=1)
+ finally:
+ self.state.memo.title_styles, self.state.memo.section_level, self.state.memo.reporter = buf
else:
app.verbose(message)
-
+def info(app, message):
+ if UseLogging:
+ logger.info(message)
+ else:
+ app.info(message)
async pf acknowledgment msr
0x4b564d07.
+KVM_FEATURE_MSI_EXT_DEST_ID 15 guest checks this feature bit
+ before using extended destination
+ ID bits in MSI address bits 11-5.
+
KVM_FEATURE_CLOCKSOURCE_STABLE_BIT 24 host will warn if no guest-side
per-cpu warps are expected in
kvmclock
N: rockchip
ARM/SAMSUNG EXYNOS ARM ARCHITECTURES
-M: Kukjin Kim <kgene@kernel.org>
M: Krzysztof Kozlowski <krzk@kernel.org>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
L: linux-samsung-soc@vger.kernel.org
N: visconti
ARM/UNIPHIER ARCHITECTURE
-M: Masahiro Yamada <yamada.masahiro@socionext.com>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
-S: Maintained
-T: git git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-uniphier.git
+S: Orphan
F: Documentation/devicetree/bindings/arm/socionext/uniphier.yaml
F: Documentation/devicetree/bindings/gpio/socionext,uniphier-gpio.yaml
F: Documentation/devicetree/bindings/pinctrl/socionext,uniphier-pinctrl.yaml
F: drivers/media/platform/sti/delta
DENALI NAND DRIVER
-M: Masahiro Yamada <yamada.masahiro@socionext.com>
L: linux-mtd@lists.infradead.org
-S: Supported
+S: Orphan
F: drivers/mtd/nand/raw/denali*
DESIGNWARE EDMA CORE IP DRIVER
W: https://01.org/linux-acpi
F: drivers/platform/x86/intel_menlow.c
-INTEL MIC DRIVERS (mic)
-M: Sudeep Dutt <sudeep.dutt@intel.com>
-M: Ashutosh Dixit <ashutosh.dixit@intel.com>
-S: Supported
-W: https://github.com/sudeepdutt/mic
-W: http://software.intel.com/en-us/mic-developer
-F: Documentation/misc-devices/mic/
-F: drivers/dma/mic_x100_dma.c
-F: drivers/dma/mic_x100_dma.h
-F: drivers/misc/mic/
-F: include/linux/mic_bus.h
-F: include/linux/scif.h
-F: include/uapi/linux/mic_common.h
-F: include/uapi/linux/mic_ioctl.h
-F: include/uapi/linux/scif_ioctl.h
-
INTEL P-Unit IPC DRIVER
M: Zha Qipeng <qipeng.zha@intel.com>
L: platform-driver-x86@vger.kernel.org
SAMSUNG AUDIO (ASoC) DRIVERS
M: Krzysztof Kozlowski <krzk@kernel.org>
-M: Sangbeom Kim <sbkim73@samsung.com>
M: Sylwester Nawrocki <s.nawrocki@samsung.com>
L: alsa-devel@alsa-project.org (moderated for non-subscribers)
S: Supported
F: drivers/platform/x86/samsung-laptop.c
SAMSUNG MULTIFUNCTION PMIC DEVICE DRIVERS
-M: Sangbeom Kim <sbkim73@samsung.com>
M: Krzysztof Kozlowski <krzk@kernel.org>
M: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
L: linux-kernel@vger.kernel.org
F: include/linux/platform_data/clk-s3c2410.h
SAMSUNG SPI DRIVERS
-M: Kukjin Kim <kgene@kernel.org>
M: Krzysztof Kozlowski <krzk@kernel.org>
M: Andi Shyti <andi@etezian.org>
L: linux-spi@vger.kernel.org
VERSION = 5
PATCHLEVEL = 10
SUBLEVEL = 0
-EXTRAVERSION = -rc1
+EXTRAVERSION = -rc2
NAME = Kleptomaniac Octopus
# *DOCUMENTATION*
/delete-property/ #size-cells;
spi-slave;
status = "okay";
- ready-gpio = <&gpio 125 GPIO_ACTIVE_HIGH>;
+ ready-gpios = <&gpio 125 GPIO_ACTIVE_HIGH>;
slave {
compatible = "olpc,xo1.75-ec";
spi-cpha;
- cmd-gpio = <&gpio 155 GPIO_ACTIVE_HIGH>;
+ cmd-gpios = <&gpio 155 GPIO_ACTIVE_HIGH>;
};
};
interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&soc_clocks MMP2_CLK_CCIC0>;
clock-names = "axi";
+ power-domains = <&soc_clocks MMP3_POWER_DOMAIN_CAMERA>;
#clock-cells = <0>;
clock-output-names = "mclk";
status = "disabled";
interrupts = <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&soc_clocks MMP2_CLK_CCIC1>;
clock-names = "axi";
+ power-domains = <&soc_clocks MMP3_POWER_DOMAIN_CAMERA>;
#clock-cells = <0>;
clock-output-names = "mclk";
status = "disabled";
states = <1800000 0x1>,
<2900000 0x0>;
};
+
+ vin: vin {
+ compatible = "regulator-fixed";
+ regulator-name = "vin";
+ regulator-min-microvolt = <5000000>;
+ regulator-max-microvolt = <5000000>;
+ regulator-always-on;
+ };
};
&adc {
regulators {
compatible = "st,stpmic1-regulators";
+ buck1-supply = <&vin>;
+ buck2-supply = <&vin>;
+ buck3-supply = <&vin>;
+ buck4-supply = <&vin>;
ldo1-supply = <&v3v3>;
ldo2-supply = <&v3v3>;
ldo3-supply = <&vdd_ddr>;
+ ldo4-supply = <&vin>;
ldo5-supply = <&v3v3>;
ldo6-supply = <&v3v3>;
+ vref_ddr-supply = <&vin>;
+ boost-supply = <&vin>;
pwr_sw1-supply = <&bst_out>;
pwr_sw2-supply = <&bst_out>;
dais = <&sai2a_port &sai2b_port &i2s2_port>;
status = "okay";
};
+
+ vin: vin {
+ compatible = "regulator-fixed";
+ regulator-name = "vin";
+ regulator-min-microvolt = <5000000>;
+ regulator-max-microvolt = <5000000>;
+ regulator-always-on;
+ };
};
&adc {
regulators {
compatible = "st,stpmic1-regulators";
+ buck1-supply = <&vin>;
+ buck2-supply = <&vin>;
+ buck3-supply = <&vin>;
+ buck4-supply = <&vin>;
ldo1-supply = <&v3v3>;
+ ldo2-supply = <&vin>;
ldo3-supply = <&vdd_ddr>;
+ ldo4-supply = <&vin>;
+ ldo5-supply = <&vin>;
ldo6-supply = <&v3v3>;
+ vref_ddr-supply = <&vin>;
+ boost-supply = <&vin>;
pwr_sw1-supply = <&bst_out>;
pwr_sw2-supply = <&bst_out>;
trips {
cpu_alert0: cpu-alert0 {
/* milliCelsius */
- temperature = <850000>;
+ temperature = <85000>;
hysteresis = <2000>;
type = "passive";
};
CONFIG_SPI_IMX=y
CONFIG_SPI_SPIDEV=y
CONFIG_GPIO_SYSFS=y
+CONFIG_GPIO_MXC=y
CONFIG_W1=y
CONFIG_W1_MASTER_MXC=y
CONFIG_W1_SLAVE_THERM=y
CONFIG_GPIO_PCF857X=y
CONFIG_GPIO_STMPE=y
CONFIG_GPIO_74X164=y
+CONFIG_GPIO_MXC=y
CONFIG_POWER_RESET=y
CONFIG_POWER_RESET_SYSCON=y
CONFIG_POWER_RESET_SYSCON_POWEROFF=y
CONFIG_SPI_ORION=y
CONFIG_GPIO_ASPEED=m
CONFIG_GPIO_ASPEED_SGPIO=y
+CONFIG_GPIO_MXC=y
CONFIG_POWER_RESET=y
CONFIG_POWER_RESET_GPIO=y
CONFIG_POWER_RESET_QNAP=y
CONFIG_GPIO_TPS6586X=y
CONFIG_GPIO_TPS65910=y
CONFIG_GPIO_TWL4030=y
+CONFIG_GPIO_MXC=y
CONFIG_POWER_AVS=y
CONFIG_ROCKCHIP_IODOMAIN=y
CONFIG_POWER_RESET_AS3722=y
ARM_DISCARD
#ifndef CONFIG_SMP_ON_UP
*(.alt.smp.init)
+#endif
+#ifndef CONFIG_ARM_UNWIND
+ *(.ARM.exidx) *(.ARM.exidx.*)
+ *(.ARM.extab) *(.ARM.extab.*)
#endif
}
/*
* MMU is disabled, use the physical address of the coherency
- * base address. However, if the coherency fabric isn't mapped
- * (i.e its virtual address is zero), it means coherency is
- * not enabled, so we return 0.
+ * base address, (or 0x0 if the coherency fabric is not mapped)
*/
- ldr r1, =coherency_base
- cmp r1, #0
- beq 2f
adr r1, 3f
ldr r3, [r1]
ldr r1, [r1, r3]
If unsure, say Y.
+config ARM64_ERRATUM_1508412
+ bool "Cortex-A77: 1508412: workaround deadlock on sequence of NC/Device load and store exclusive or PAR read"
+ default y
+ help
+ This option adds a workaround for Arm Cortex-A77 erratum 1508412.
+
+ Affected Cortex-A77 cores (r0p0, r1p0) could deadlock on a sequence
+ of a store-exclusive or read of PAR_EL1 and a load with device or
+ non-cacheable memory attributes. The workaround depends on a firmware
+ counterpart.
+
+ KVM guests must also have the workaround implemented or they can
+ deadlock the system.
+
+ Work around the issue by inserting DMB SY barriers around PAR_EL1
+ register reads and warning KVM users. The DMB barrier is sufficient
+ to prevent a speculative PAR_EL1 read.
+
+ If unsure, say Y.
+
config CAVIUM_ERRATUM_22375
bool "Cavium erratum 22375, 24313"
default y
config ARCH_BERLIN
bool "Marvell Berlin SoC Family"
select DW_APB_ICTL
+ select DW_APB_TIMER_OF
select GPIOLIB
select PINCTRL
help
pinctrl-0 = <&uart_ao_a_pins>;
pinctrl-names = "default";
};
+
+&usb {
+ status = "okay";
+ dr_mode = "otg";
+ vbus-supply = <&usb_pwr>;
+};
#size-cells = <2>;
ranges;
+ usb: usb@ffe09080 {
+ compatible = "amlogic,meson-axg-usb-ctrl";
+ reg = <0x0 0xffe09080 0x0 0x20>;
+ interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ clocks = <&clkc CLKID_USB>, <&clkc CLKID_USB1_DDR_BRIDGE>;
+ clock-names = "usb_ctrl", "ddr";
+ resets = <&reset RESET_USB_OTG>;
+
+ dr_mode = "otg";
+
+ phys = <&usb2_phy1>;
+ phy-names = "usb2-phy1";
+
+ dwc2: usb@ff400000 {
+ compatible = "amlogic,meson-g12a-usb", "snps,dwc2";
+ reg = <0x0 0xff400000 0x0 0x40000>;
+ interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&clkc CLKID_USB1>;
+ clock-names = "otg";
+ phys = <&usb2_phy1>;
+ dr_mode = "peripheral";
+ g-rx-fifo-size = <192>;
+ g-np-tx-fifo-size = <128>;
+ g-tx-fifo-size = <128 128 16 16 16>;
+ };
+
+ dwc3: usb@ff500000 {
+ compatible = "snps,dwc3";
+ reg = <0x0 0xff500000 0x0 0x100000>;
+ interrupts = <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH>;
+ dr_mode = "host";
+ maximum-speed = "high-speed";
+ snps,dis_u2_susphy_quirk;
+ };
+ };
+
ethmac: ethernet@ff3f0000 {
compatible = "amlogic,meson-axg-dwmac",
"snps,dwmac-3.70a",
"timing-adjustment";
rx-fifo-depth = <4096>;
tx-fifo-depth = <2048>;
+ resets = <&reset RESET_ETHERNET>;
+ reset-names = "stmmaceth";
status = "disabled";
};
clock-names = "core", "clkin0", "clkin1";
resets = <&reset RESET_SD_EMMC_C>;
};
+
+ usb2_phy1: phy@9020 {
+ compatible = "amlogic,meson-gxl-usb2-phy";
+ #phy-cells = <0>;
+ reg = <0x0 0x9020 0x0 0x20>;
+ clocks = <&clkc CLKID_USB>;
+ clock-names = "phy";
+ resets = <&reset RESET_USB_OTG>;
+ reset-names = "phy";
+ };
};
sram: sram@fffc0000 {
};
ethmac: ethernet@ff3f0000 {
- compatible = "amlogic,meson-axg-dwmac",
+ compatible = "amlogic,meson-g12a-dwmac",
"snps,dwmac-3.70a",
"snps,dwmac";
reg = <0x0 0xff3f0000 0x0 0x10000>,
"timing-adjustment";
rx-fifo-depth = <4096>;
tx-fifo-depth = <2048>;
+ resets = <&reset RESET_ETHERNET>;
+ reset-names = "stmmaceth";
status = "disabled";
mdio0: mdio {
hwrng: rng@218 {
compatible = "amlogic,meson-rng";
reg = <0x0 0x218 0x0 0x4>;
+ clocks = <&clkc CLKID_RNG0>;
+ clock-names = "core";
};
};
regulator-min-microvolt = <680000>;
regulator-max-microvolt = <1040000>;
- pwms = <&pwm_AO_cd 1 1500 0>;
+ pwms = <&pwm_ab 0 1500 0>;
};
&vddcpu_b {
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/power/meson-gxbb-power.h>
+#include <dt-bindings/reset/amlogic,meson-gxbb-reset.h>
#include <dt-bindings/thermal/thermal.h>
/ {
interrupt-names = "macirq";
rx-fifo-depth = <4096>;
tx-fifo-depth = <2048>;
+ resets = <&reset RESET_ETHERNET>;
+ reset-names = "stmmaceth";
power-domains = <&pwrc PWRC_GXBB_ETHERNET_MEM_ID>;
status = "disabled";
};
compatible = "globalscale,espressobin-v7-emmc", "globalscale,espressobin-v7",
"globalscale,espressobin", "marvell,armada3720",
"marvell,armada3710";
+
+ aliases {
+ /* ethernet1 is wan port */
+ ethernet1 = &switch0port3;
+ ethernet3 = &switch0port1;
+ };
};
&switch0 {
ports {
- port@1 {
+ switch0port1: port@1 {
reg = <1>;
label = "lan1";
phy-handle = <&switch0phy0>;
};
- port@3 {
+ switch0port3: port@3 {
reg = <3>;
label = "wan";
phy-handle = <&switch0phy2>;
model = "Globalscale Marvell ESPRESSOBin Board V7";
compatible = "globalscale,espressobin-v7", "globalscale,espressobin",
"marvell,armada3720", "marvell,armada3710";
+
+ aliases {
+ /* ethernet1 is wan port */
+ ethernet1 = &switch0port3;
+ ethernet3 = &switch0port1;
+ };
};
&switch0 {
ports {
- port@1 {
+ switch0port1: port@1 {
reg = <1>;
label = "lan1";
phy-handle = <&switch0phy0>;
};
- port@3 {
+ switch0port3: port@3 {
reg = <3>;
label = "wan";
phy-handle = <&switch0phy2>;
/ {
aliases {
ethernet0 = ð0;
+ /* for dsa slave device */
+ ethernet1 = &switch0port1;
+ ethernet2 = &switch0port2;
+ ethernet3 = &switch0port3;
serial0 = &uart0;
serial1 = &uart1;
};
#address-cells = <1>;
#size-cells = <0>;
- port@0 {
+ switch0port0: port@0 {
reg = <0>;
label = "cpu";
ethernet = <ð0>;
};
};
- port@1 {
+ switch0port1: port@1 {
reg = <1>;
label = "wan";
phy-handle = <&switch0phy0>;
};
- port@2 {
+ switch0port2: port@2 {
reg = <2>;
label = "lan0";
phy-handle = <&switch0phy1>;
};
- port@3 {
+ switch0port3: port@3 {
reg = <3>;
label = "lan1";
phy-handle = <&switch0phy2>;
CONFIG_GPIO_DWAPB=y
CONFIG_GPIO_MB86S7X=y
CONFIG_GPIO_MPC8XXX=y
+CONFIG_GPIO_MXC=y
CONFIG_GPIO_PL061=y
CONFIG_GPIO_RCAR=y
CONFIG_GPIO_UNIPHIER=y
#define CTR_L1IP(ctr) (((ctr) >> CTR_L1IP_SHIFT) & CTR_L1IP_MASK)
#define ICACHE_POLICY_VPIPT 0
+#define ICACHE_POLICY_RESERVED 1
#define ICACHE_POLICY_VIPT 2
#define ICACHE_POLICY_PIPT 3
#define ARM64_HAS_ARMv8_4_TTL 55
#define ARM64_HAS_TLB_RANGE 56
#define ARM64_MTE 57
+#define ARM64_WORKAROUND_1508412 58
-#define ARM64_NCAPS 58
+#define ARM64_NCAPS 59
#endif /* __ASM_CPUCAPS_H */
return false;
}
+static __always_inline bool is_vhe_hyp_code(void)
+{
+ /* Only defined for code run in VHE hyp context */
+ return __is_defined(__KVM_VHE_HYPERVISOR__);
+}
+
+static __always_inline bool is_nvhe_hyp_code(void)
+{
+ /* Only defined for code run in NVHE hyp context */
+ return __is_defined(__KVM_NVHE_HYPERVISOR__);
+}
+
+static __always_inline bool is_hyp_code(void)
+{
+ return is_vhe_hyp_code() || is_nvhe_hyp_code();
+}
+
extern DECLARE_BITMAP(cpu_hwcaps, ARM64_NCAPS);
extern struct static_key_false cpu_hwcap_keys[ARM64_NCAPS];
extern struct static_key_false arm64_const_caps_ready;
}
/*
- * Test for a capability, possibly with a runtime check.
+ * Test for a capability without a runtime check.
*
- * Before capabilities are finalized, this behaves as cpus_have_cap().
+ * Before capabilities are finalized, this will BUG().
* After capabilities are finalized, this is patched to avoid a runtime check.
*
* @num must be a compile-time constant.
*/
-static __always_inline bool cpus_have_const_cap(int num)
+static __always_inline bool cpus_have_final_cap(int num)
{
if (system_capabilities_finalized())
return __cpus_have_const_cap(num);
else
- return cpus_have_cap(num);
+ BUG();
}
/*
- * Test for a capability without a runtime check.
+ * Test for a capability, possibly with a runtime check for non-hyp code.
*
- * Before capabilities are finalized, this will BUG().
+ * For hyp code, this behaves the same as cpus_have_final_cap().
+ *
+ * For non-hyp code:
+ * Before capabilities are finalized, this behaves as cpus_have_cap().
* After capabilities are finalized, this is patched to avoid a runtime check.
*
* @num must be a compile-time constant.
*/
-static __always_inline bool cpus_have_final_cap(int num)
+static __always_inline bool cpus_have_const_cap(int num)
{
- if (system_capabilities_finalized())
+ if (is_hyp_code())
+ return cpus_have_final_cap(num);
+ else if (system_capabilities_finalized())
return __cpus_have_const_cap(num);
else
- BUG();
+ return cpus_have_cap(num);
}
static inline void cpus_set_cap(unsigned int num)
#define ARM_CPU_PART_CORTEX_A55 0xD05
#define ARM_CPU_PART_CORTEX_A76 0xD0B
#define ARM_CPU_PART_NEOVERSE_N1 0xD0C
+#define ARM_CPU_PART_CORTEX_A77 0xD0D
#define APM_CPU_PART_POTENZA 0x000
#define MIDR_CORTEX_A55 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A55)
#define MIDR_CORTEX_A76 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A76)
#define MIDR_NEOVERSE_N1 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_NEOVERSE_N1)
+#define MIDR_CORTEX_A77 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A77)
#define MIDR_THUNDERX MIDR_CPU_MODEL(ARM_CPU_IMP_CAVIUM, CAVIUM_CPU_PART_THUNDERX)
#define MIDR_THUNDERX_81XX MIDR_CPU_MODEL(ARM_CPU_IMP_CAVIUM, CAVIUM_CPU_PART_THUNDERX_81XX)
#define MIDR_THUNDERX_83XX MIDR_CPU_MODEL(ARM_CPU_IMP_CAVIUM, CAVIUM_CPU_PART_THUNDERX_83XX)
#define cp14_DBGWCR0 (DBGWCR0_EL1 * 2)
#define cp14_DBGWVR0 (DBGWVR0_EL1 * 2)
#define cp14_DBGDCCINT (MDCCINT_EL1 * 2)
+#define cp14_DBGVCR (DBGVCR32_EL2 * 2)
#define NR_COPRO_REGS (NR_SYS_REGS * 2)
#include <linux/build_bug.h>
#include <linux/types.h>
+#include <asm/alternative.h>
#define __DEFINE_MRS_MSR_S_REGNUM \
" .irp num,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30\n" \
write_sysreg_s(__scs_new, sysreg); \
} while (0)
+#define read_sysreg_par() ({ \
+ u64 par; \
+ asm(ALTERNATIVE("nop", "dmb sy", ARM64_WORKAROUND_1508412)); \
+ par = read_sysreg(par_el1); \
+ asm(ALTERNATIVE("nop", "dmb sy", ARM64_WORKAROUND_1508412)); \
+ par; \
+})
+
#endif
#endif /* __ASM_SYSREG_H */
static __always_inline bool has_vhe(void)
{
/*
- * The following macros are defined for code specic to VHE/nVHE.
- * If has_vhe() is inlined into those compilation units, it can
- * be determined statically. Otherwise fall back to caps.
+ * Code only run in VHE/NVHE hyp context can assume VHE is present or
+ * absent. Otherwise fall back to caps.
*/
- if (__is_defined(__KVM_VHE_HYPERVISOR__))
+ if (is_vhe_hyp_code())
return true;
- else if (__is_defined(__KVM_NVHE_HYPERVISOR__))
+ else if (is_nvhe_hyp_code())
return false;
else
return cpus_have_final_cap(ARM64_HAS_VIRT_HOST_EXTN);
.matches = has_neoverse_n1_erratum_1542419,
.cpu_enable = cpu_enable_trap_ctr_access,
},
+#endif
+#ifdef CONFIG_ARM64_ERRATUM_1508412
+ {
+ /* we depend on the firmware portion for correctness */
+ .desc = "ARM erratum 1508412 (kernel portion)",
+ .capability = ARM64_WORKAROUND_1508412,
+ ERRATA_MIDR_RANGE(MIDR_CORTEX_A77,
+ 0, 0,
+ 1, 0),
+ },
#endif
{
}
static struct cpuinfo_arm64 boot_cpu_data;
static const char *icache_policy_str[] = {
- [0 ... ICACHE_POLICY_PIPT] = "RESERVED/UNKNOWN",
+ [ICACHE_POLICY_VPIPT] = "VPIPT",
+ [ICACHE_POLICY_RESERVED] = "RESERVED/UNKNOWN",
[ICACHE_POLICY_VIPT] = "VIPT",
[ICACHE_POLICY_PIPT] = "PIPT",
- [ICACHE_POLICY_VPIPT] = "VPIPT",
};
unsigned long __icache_flags;
case ICACHE_POLICY_VPIPT:
set_bit(ICACHEF_VPIPT, &__icache_flags);
break;
- default:
+ case ICACHE_POLICY_RESERVED:
case ICACHE_POLICY_VIPT:
/* Assume aliasing */
set_bit(ICACHEF_ALIASING, &__icache_flags);
+ break;
}
pr_info("Detected %s I-cache on CPU%d\n", icache_policy_str[l1ip], cpu);
* correctly at this alignment, we must ensure that .text is
* placed at a 4k boundary in the Image to begin with.
*/
- .align 12
+ .balign SEGMENT_ALIGN
efi_header_end:
.endm
br x30
#endif
.else
+ /* Ensure any device/NC reads complete */
+ alternative_insn nop, "dmb sy", ARM64_WORKAROUND_1508412
+
eret
.endif
sb
/* Kernel symbols needed for cpus_have_final/const_caps checks. */
KVM_NVHE_ALIAS(arm64_const_caps_ready);
KVM_NVHE_ALIAS(cpu_hwcap_keys);
-KVM_NVHE_ALIAS(cpu_hwcaps);
/* Static keys which are set if a vGIC trap should be handled in hyp. */
KVM_NVHE_ALIAS(vgic_v2_cpuif_trap);
return SPECTRE_VULNERABLE;
}
-#define SMCCC_ARCH_WORKAROUND_RET_UNAFFECTED (1)
-
static enum mitigation_state spectre_v2_get_cpu_fw_mitigation_state(void)
{
int ret;
if (system_uses_irq_prio_masking())
init_gic_priority_masking();
+ rcu_cpu_starting(cpu);
preempt_disable();
trace_hardirqs_off();
CC_COMPAT ?= $(CC)
CC_COMPAT += $(CC_COMPAT_CLANG_FLAGS)
+
+ifneq ($(LLVM),)
+LD_COMPAT ?= $(LD)
+else
+LD_COMPAT ?= $(CROSS_COMPILE_COMPAT)ld
+endif
else
CC_COMPAT ?= $(CROSS_COMPILE_COMPAT)gcc
+LD_COMPAT ?= $(CROSS_COMPILE_COMPAT)ld
endif
cc32-option = $(call try-run,\
$(CC_COMPAT) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2))
cc32-disable-warning = $(call try-run,\
$(CC_COMPAT) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
-cc32-ldoption = $(call try-run,\
- $(CC_COMPAT) $(1) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2))
cc32-as-instr = $(call try-run,\
printf "%b\n" "$(1)" | $(CC_COMPAT) $(VDSO_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3))
VDSO_CFLAGS += $(dmbinstr)
VDSO_AFLAGS += $(dmbinstr)
-VDSO_LDFLAGS := $(VDSO_CPPFLAGS)
# From arm vDSO Makefile
-VDSO_LDFLAGS += -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1
-VDSO_LDFLAGS += -Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
-VDSO_LDFLAGS += -nostdlib -shared -mfloat-abi=soft
-VDSO_LDFLAGS += -Wl,--hash-style=sysv
-VDSO_LDFLAGS += -Wl,--build-id=sha1
-VDSO_LDFLAGS += $(call cc32-ldoption,-fuse-ld=bfd)
+VDSO_LDFLAGS += -Bsymbolic --no-undefined -soname=linux-vdso.so.1
+VDSO_LDFLAGS += -z max-page-size=4096 -z common-page-size=4096
+VDSO_LDFLAGS += -nostdlib -shared --hash-style=sysv --build-id=sha1
# Borrow vdsomunge.c from the arm vDSO
cmd_vdsold_and_vdso_check = $(cmd_vdsold); $(cmd_vdso_check)
quiet_cmd_vdsold = LD32 $@
- cmd_vdsold = $(CC_COMPAT) -Wp,-MD,$(depfile) $(VDSO_LDFLAGS) \
- -Wl,-T $(filter %.lds,$^) $(filter %.o,$^) -o $@
+ cmd_vdsold = $(LD_COMPAT) $(VDSO_LDFLAGS) \
+ -T $(filter %.lds,$^) $(filter %.o,$^) -o $@
quiet_cmd_vdsocc = CC32 $@
cmd_vdsocc = $(CC_COMPAT) -Wp,-MD,$(depfile) $(VDSO_CFLAGS) -c -o $@ $<
quiet_cmd_vdsocc_gettimeofday = CC32 $@
* explicitly check instead of blindly discarding.
*/
.plt : {
- *(.plt) *(.plt.*) *(.iplt) *(.igot)
+ *(.plt) *(.plt.*) *(.iplt) *(.igot .igot.plt)
}
ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!")
preempt_enable();
+ /*
+ * The ARMv8 architecture doesn't give the hypervisor
+ * a mechanism to prevent a guest from dropping to AArch32 EL0
+ * if implemented by the CPU. If we spot the guest in such
+ * state and that we decided it wasn't supposed to do so (like
+ * with the asymmetric AArch32 case), return to userspace with
+ * a fatal error.
+ */
+ if (!system_supports_32bit_el0() && vcpu_mode_is_32bit(vcpu)) {
+ /*
+ * As we have caught the guest red-handed, decide that
+ * it isn't fit for purpose anymore by making the vcpu
+ * invalid. The VMM can try and fix it by issuing a
+ * KVM_ARM_VCPU_INIT if it really wants to.
+ */
+ vcpu->arch.target = -1;
+ ret = ARM_EXCEPTION_IL;
+ }
+
ret = handle_exit(vcpu, ret);
}
return -ENODEV;
}
- if (cpus_have_final_cap(ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE))
+ if (cpus_have_final_cap(ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE) ||
+ cpus_have_final_cap(ARM64_WORKAROUND_1508412))
kvm_info("Guests without required CPU erratum workarounds can deadlock system!\n" \
"Only trusted guests should be used on this system.\n");
* We do need to save/restore PAR_EL1 though, as we haven't
* saved the guest context yet, and we may return early...
*/
- par = read_sysreg(par_el1);
+ par = read_sysreg_par();
if (!__kvm_at("s1e1r", far))
- tmp = read_sysreg(par_el1);
+ tmp = read_sysreg_par();
else
tmp = SYS_PAR_EL1_F; /* back to the guest */
write_sysreg(par, par_el1);
if (cpus_have_final_cap(ARM64_WORKAROUND_CAVIUM_TX2_219_TVM) &&
kvm_vcpu_trap_get_class(vcpu) == ESR_ELx_EC_SYS64 &&
handle_tx2_tvm(vcpu))
- return true;
+ goto guest;
/*
* We trap the first access to the FP/SIMD to save the host context
* Similarly for trapped SVE accesses.
*/
if (__hyp_handle_fpsimd(vcpu))
- return true;
+ goto guest;
if (__hyp_handle_ptrauth(vcpu))
- return true;
+ goto guest;
if (!__populate_fault_info(vcpu))
- return true;
+ goto guest;
if (static_branch_unlikely(&vgic_v2_cpuif_trap)) {
bool valid;
int ret = __vgic_v2_perform_cpuif_access(vcpu);
if (ret == 1)
- return true;
+ goto guest;
/* Promote an illegal access to an SError.*/
if (ret == -1)
int ret = __vgic_v3_perform_cpuif_access(vcpu);
if (ret == 1)
- return true;
+ goto guest;
}
exit:
/* Return to the host kernel and handle the exit */
return false;
+
+guest:
+ /* Re-enter the guest */
+ asm(ALTERNATIVE("nop", "dmb sy", ARM64_WORKAROUND_1508412));
+ return true;
}
static inline void __kvm_unexpected_el2_exception(void)
ctxt_sys_reg(ctxt, CONTEXTIDR_EL1) = read_sysreg_el1(SYS_CONTEXTIDR);
ctxt_sys_reg(ctxt, AMAIR_EL1) = read_sysreg_el1(SYS_AMAIR);
ctxt_sys_reg(ctxt, CNTKCTL_EL1) = read_sysreg_el1(SYS_CNTKCTL);
- ctxt_sys_reg(ctxt, PAR_EL1) = read_sysreg(par_el1);
+ ctxt_sys_reg(ctxt, PAR_EL1) = read_sysreg_par();
ctxt_sys_reg(ctxt, TPIDR_EL1) = read_sysreg(tpidr_el1);
ctxt_sys_reg(ctxt, SP_EL1) = read_sysreg(sp_el1);
get_host_ctxt x0, x1
- ALTERNATIVE(nop, SET_PSTATE_PAN(1), ARM64_HAS_PAN, CONFIG_ARM64_PAN)
-
/* Store the host regs x2 and x3 */
stp x2, x3, [x0, #CPU_XREG_OFFSET(2)]
cmp x0, #HVC_STUB_HCALL_NR
b.lo __kvm_handle_stub_hvc
- /* Set tpidr_el2 for use by HYP to free a register */
- msr tpidr_el2, x2
-
- mov x2, #KVM_HOST_SMCCC_FUNC(__kvm_hyp_init)
- cmp x0, x2
- b.eq 1f
+ // We only actively check bits [24:31], and everything
+ // else has to be zero, which we check at build time.
+#if (KVM_HOST_SMCCC_FUNC(__kvm_hyp_init) & 0xFFFFFFFF00FFFFFF)
+#error Unexpected __KVM_HOST_SMCCC_FUNC___kvm_hyp_init value
+#endif
+
+ ror x0, x0, #24
+ eor x0, x0, #((KVM_HOST_SMCCC_FUNC(__kvm_hyp_init) >> 24) & 0xF)
+ ror x0, x0, #4
+ eor x0, x0, #((KVM_HOST_SMCCC_FUNC(__kvm_hyp_init) >> 28) & 0xF)
+ cbz x0, 1f
mov x0, #SMCCC_RET_NOT_SUPPORTED
eret
-1: phys_to_ttbr x0, x1
+1:
+ /* Set tpidr_el2 for use by HYP to free a register */
+ msr tpidr_el2, x2
+
+ phys_to_ttbr x0, x1
alternative_if ARM64_HAS_CNP
orr x0, x0, #TTBR_CNP_BIT
alternative_else_nop_endif
{
u64 spsr = read_sysreg_el2(SYS_SPSR);
u64 elr = read_sysreg_el2(SYS_ELR);
- u64 par = read_sysreg(par_el1);
+ u64 par = read_sysreg_par();
bool restore_host = true;
struct kvm_cpu_context *host_ctxt;
struct kvm_vcpu *vcpu;
struct tlb_inv_context cxt;
/* Switch to requested VMID */
- mmu = kern_hyp_va(mmu);
__tlb_switch_to_guest(mmu, &cxt);
__tlbi(vmalle1);
static bool stage2_pte_cacheable(kvm_pte_t pte)
{
- u64 memattr = FIELD_GET(KVM_PTE_LEAF_ATTR_LO_S2_MEMATTR, pte);
+ u64 memattr = pte & KVM_PTE_LEAF_ATTR_LO_S2_MEMATTR;
return memattr == PAGE_S2_MEMATTR(NORMAL);
}
u32 start_level = VTCR_EL2_TGRAN_SL0_BASE - sl0;
pgd_sz = kvm_pgd_pages(ia_bits, start_level) * PAGE_SIZE;
- pgt->pgd = alloc_pages_exact(pgd_sz, GFP_KERNEL | __GFP_ZERO);
+ pgt->pgd = alloc_pages_exact(pgd_sz, GFP_KERNEL_ACCOUNT | __GFP_ZERO);
if (!pgt->pgd)
return -ENOMEM;
{
u64 spsr = read_sysreg_el2(SYS_SPSR);
u64 elr = read_sysreg_el2(SYS_ELR);
- u64 par = read_sysreg(par_el1);
+ u64 par = read_sysreg_par();
__hyp_call_panic(spsr, elr, par);
unreachable();
val = SMCCC_RET_SUCCESS;
break;
case SPECTRE_UNAFFECTED:
- val = SMCCC_RET_NOT_REQUIRED;
+ val = SMCCC_ARCH_WORKAROUND_RET_UNAFFECTED;
break;
}
break;
vma_shift = PAGE_SHIFT;
}
- if (vma_shift == PUD_SHIFT &&
- !fault_supports_stage2_huge_mapping(memslot, hva, PUD_SIZE))
- vma_shift = PMD_SHIFT;
-
- if (vma_shift == PMD_SHIFT &&
- !fault_supports_stage2_huge_mapping(memslot, hva, PMD_SIZE)) {
- force_pte = true;
+ switch (vma_shift) {
+ case PUD_SHIFT:
+ if (fault_supports_stage2_huge_mapping(memslot, hva, PUD_SIZE))
+ break;
+ fallthrough;
+ case CONT_PMD_SHIFT:
+ vma_shift = PMD_SHIFT;
+ fallthrough;
+ case PMD_SHIFT:
+ if (fault_supports_stage2_huge_mapping(memslot, hva, PMD_SIZE))
+ break;
+ fallthrough;
+ case CONT_PTE_SHIFT:
vma_shift = PAGE_SHIFT;
+ force_pte = true;
+ fallthrough;
+ case PAGE_SHIFT:
+ break;
+ default:
+ WARN_ONCE(1, "Unknown vma_shift %d", vma_shift);
}
vma_pagesize = 1UL << vma_shift;
if (kvm_is_device_pfn(pfn)) {
device = true;
+ force_pte = true;
} else if (logging_active && !write_fault) {
/*
* Only actually map the page as writable if this was a write
case AMAIR_EL1: *val = read_sysreg_s(SYS_AMAIR_EL12); break;
case CNTKCTL_EL1: *val = read_sysreg_s(SYS_CNTKCTL_EL12); break;
case ELR_EL1: *val = read_sysreg_s(SYS_ELR_EL12); break;
- case PAR_EL1: *val = read_sysreg_s(SYS_PAR_EL1); break;
+ case PAR_EL1: *val = read_sysreg_par(); break;
case DACR32_EL2: *val = read_sysreg_s(SYS_DACR32_EL2); break;
case IFSR32_EL2: *val = read_sysreg_s(SYS_IFSR32_EL2); break;
case DBGVCR32_EL2: *val = read_sysreg_s(SYS_DBGVCR32_EL2); break;
{ Op1( 0), CRn( 0), CRm( 1), Op2( 0), trap_raz_wi },
DBG_BCR_BVR_WCR_WVR(1),
/* DBGDCCINT */
- { Op1( 0), CRn( 0), CRm( 2), Op2( 0), trap_debug32 },
+ { Op1( 0), CRn( 0), CRm( 2), Op2( 0), trap_debug32, NULL, cp14_DBGDCCINT },
/* DBGDSCRext */
- { Op1( 0), CRn( 0), CRm( 2), Op2( 2), trap_debug32 },
+ { Op1( 0), CRn( 0), CRm( 2), Op2( 2), trap_debug32, NULL, cp14_DBGDSCRext },
DBG_BCR_BVR_WCR_WVR(2),
/* DBGDTR[RT]Xint */
{ Op1( 0), CRn( 0), CRm( 3), Op2( 0), trap_raz_wi },
{ Op1( 0), CRn( 0), CRm( 6), Op2( 2), trap_raz_wi },
DBG_BCR_BVR_WCR_WVR(6),
/* DBGVCR */
- { Op1( 0), CRn( 0), CRm( 7), Op2( 0), trap_debug32 },
+ { Op1( 0), CRn( 0), CRm( 7), Op2( 0), trap_debug32, NULL, cp14_DBGVCR },
DBG_BCR_BVR_WCR_WVR(7),
DBG_BCR_BVR_WCR_WVR(8),
DBG_BCR_BVR_WCR_WVR(9),
stp \reg1, \reg2, [\ptr], \val
.endm
- .weak memcpy
SYM_FUNC_START_ALIAS(__memcpy)
-SYM_FUNC_START_PI(memcpy)
+SYM_FUNC_START_WEAK_PI(memcpy)
#include "copy_template.S"
ret
SYM_FUNC_END_PI(memcpy)
D_l .req x13
D_h .req x14
- .weak memmove
SYM_FUNC_START_ALIAS(__memmove)
-SYM_FUNC_START_PI(memmove)
+SYM_FUNC_START_WEAK_PI(memmove)
cmp dstin, src
b.lo __memcpy
add tmp1, src, count
tmp3w .req w9
tmp3 .req x9
- .weak memset
SYM_FUNC_START_ALIAS(__memset)
-SYM_FUNC_START_PI(memset)
+SYM_FUNC_START_WEAK_PI(memset)
mov dst, dstin /* Preserve return value. */
and A_lw, val, #255
orr A_lw, A_lw, A_lw, lsl #8
local_irq_save(flags);
asm volatile("at s1e1r, %0" :: "r" (addr));
isb();
- par = read_sysreg(par_el1);
+ par = read_sysreg_par();
local_irq_restore(flags);
/*
* final .boot.data section, which should be identical in the decompressor and
* the decompressed kernel (that is checked during the build).
*/
-#define __bootdata(var) __section(".boot.data.var") var
+#define __bootdata(var) __section(".boot.data." #var) var
/*
* .boot.preserved.data is similar to .boot.data, but it is not part of the
* .init section and thus will be preserved for later use in the decompressed
* kernel.
*/
-#define __bootdata_preserved(var) __section(".boot.preserved.data.var") var
+#define __bootdata_preserved(var) __section(".boot.preserved.data." #var) var
extern unsigned long __sdma, __edma;
extern unsigned long __stext_dma, __etext_dma;
* on some systems.
*/
-void __section(".__syscall_stub")
+void __attribute__ ((__section__ (".__syscall_stub")))
stub_clone_handler(void)
{
struct stub_data *data = (struct stub_data *) STUB_DATA;
dctx->s[1] = get_unaligned_le32(&inp[4]);
dctx->s[2] = get_unaligned_le32(&inp[8]);
dctx->s[3] = get_unaligned_le32(&inp[12]);
+ acc += POLY1305_BLOCK_SIZE;
dctx->sset = true;
}
}
440 common process_madvise sys_process_madvise
#
-# x32-specific system call numbers start at 512 to avoid cache impact
-# for native 64-bit operation. The __x32_compat_sys stubs are created
-# on-the-fly for compat_sys_*() compatibility system calls if X86_X32
-# is defined.
+# Due to a historical design error, certain syscalls are numbered differently
+# in x32 as compared to native x86_64. These syscalls have numbers 512-547.
+# Do not add new syscalls to this range. Numbers 548 and above are available
+# for non-x32 use.
#
512 x32 rt_sigaction compat_sys_rt_sigaction
513 x32 rt_sigreturn compat_sys_x32_rt_sigreturn
545 x32 execveat compat_sys_execveat
546 x32 preadv2 compat_sys_preadv64v2
547 x32 pwritev2 compat_sys_pwritev64v2
+# This is the end of the legacy x32 range. Numbers 548 and above are
+# not special and are not to be used for x32-specific syscalls.
#define KVM_FEATURE_POLL_CONTROL 12
#define KVM_FEATURE_PV_SCHED_YIELD 13
#define KVM_FEATURE_ASYNC_PF_INT 14
+#define KVM_FEATURE_MSI_EXT_DEST_ID 15
#define KVM_HINTS_REALTIME 0
temp_mm_state_t temp_state;
lockdep_assert_irqs_disabled();
+
+ /*
+ * Make sure not to be in TLB lazy mode, as otherwise we'll end up
+ * with a stale address space WITHOUT being in lazy mode after
+ * restoring the previous mm.
+ */
+ if (this_cpu_read(cpu_tlbstate.is_lazy))
+ leave_mm(smp_processor_id());
+
temp_state.mm = this_cpu_read(cpu_tlbstate.loaded_mm);
switch_mm_irqs_off(NULL, mm, current);
params->hdr.hardware_subarch = boot_params.hdr.hardware_subarch;
/* Copying screen_info will do? */
- memcpy(¶ms->screen_info, &boot_params.screen_info,
- sizeof(struct screen_info));
+ memcpy(¶ms->screen_info, &screen_info, sizeof(struct screen_info));
/* Fill in memsize later */
params->screen_info.ext_mem_k = 0;
set_debugreg(DR6_RESERVED, 6);
dr6 ^= DR6_RESERVED; /* Flip to positive polarity */
- /*
- * Clear the virtual DR6 value, ptrace routines will set bits here for
- * things we want signals for.
- */
- current->thread.virtual_dr6 = 0;
-
- /*
- * The SDM says "The processor clears the BTF flag when it
- * generates a debug exception." Clear TIF_BLOCKSTEP to keep
- * TIF_BLOCKSTEP in sync with the hardware BTF flag.
- */
- clear_thread_flag(TIF_BLOCKSTEP);
-
return dr6;
}
*/
WARN_ON_ONCE(user_mode(regs));
+ if (test_thread_flag(TIF_BLOCKSTEP)) {
+ /*
+ * The SDM says "The processor clears the BTF flag when it
+ * generates a debug exception." but PTRACE_BLOCKSTEP requested
+ * it for userspace, but we just took a kernel #DB, so re-set
+ * BTF.
+ */
+ unsigned long debugctl;
+
+ rdmsrl(MSR_IA32_DEBUGCTLMSR, debugctl);
+ debugctl |= DEBUGCTLMSR_BTF;
+ wrmsrl(MSR_IA32_DEBUGCTLMSR, debugctl);
+ }
+
/*
* Catch SYSENTER with TF set and clear DR_STEP. If this hit a
* watchpoint at the same time then that will still be handled.
irqentry_enter_from_user_mode(regs);
instrumentation_begin();
+ /*
+ * Start the virtual/ptrace DR6 value with just the DR_STEP mask
+ * of the real DR6. ptrace_triggered() will set the DR_TRAPn bits.
+ *
+ * Userspace expects DR_STEP to be visible in ptrace_get_debugreg(6)
+ * even if it is not the result of PTRACE_SINGLESTEP.
+ */
+ current->thread.virtual_dr6 = (dr6 & DR_STEP);
+
+ /*
+ * The SDM says "The processor clears the BTF flag when it
+ * generates a debug exception." Clear TIF_BLOCKSTEP to keep
+ * TIF_BLOCKSTEP in sync with the hardware BTF flag.
+ */
+ clear_thread_flag(TIF_BLOCKSTEP);
+
/*
* If dr6 has no reason to give us about the origin of this trap,
* then it's very likely the result of an icebp/int01 trap.
unsigned long *unwind_get_return_address_ptr(struct unwind_state *state)
{
- struct task_struct *task = state->task;
-
if (unwind_done(state))
return NULL;
if (state->regs)
return &state->regs->ip;
- if (task != current && state->sp == task->thread.sp) {
- struct inactive_task_frame *frame = (void *)task->thread.sp;
- return &frame->ret_addr;
- }
-
if (state->sp)
return (unsigned long *)state->sp - 1;
} else {
struct inactive_task_frame *frame = (void *)task->thread.sp;
- state->sp = task->thread.sp;
+ state->sp = task->thread.sp + sizeof(*frame);
state->bp = READ_ONCE_NOCHECK(frame->bp);
state->ip = READ_ONCE_NOCHECK(frame->ret_addr);
state->signal = (void *)state->ip == ret_from_fork;
{
u64 gpa = spte & shadow_nonpresent_or_rsvd_lower_gfn_mask;
- gpa |= (spte >> shadow_nonpresent_or_rsvd_mask_len)
+ gpa |= (spte >> SHADOW_NONPRESENT_OR_RSVD_MASK_LEN)
& shadow_nonpresent_or_rsvd_mask;
return gpa >> PAGE_SHIFT;
static u64 restore_acc_track_spte(u64 spte)
{
u64 new_spte = spte;
- u64 saved_bits = (spte >> shadow_acc_track_saved_bits_shift)
- & shadow_acc_track_saved_bits_mask;
+ u64 saved_bits = (spte >> SHADOW_ACC_TRACK_SAVED_BITS_SHIFT)
+ & SHADOW_ACC_TRACK_SAVED_BITS_MASK;
WARN_ON_ONCE(spte_ad_enabled(spte));
WARN_ON_ONCE(!is_access_track_spte(spte));
new_spte &= ~shadow_acc_track_mask;
- new_spte &= ~(shadow_acc_track_saved_bits_mask <<
- shadow_acc_track_saved_bits_shift);
+ new_spte &= ~(SHADOW_ACC_TRACK_SAVED_BITS_MASK <<
+ SHADOW_ACC_TRACK_SAVED_BITS_SHIFT);
new_spte |= saved_bits;
return new_spte;
mask |= shadow_mmio_value | access;
mask |= gpa | shadow_nonpresent_or_rsvd_mask;
mask |= (gpa & shadow_nonpresent_or_rsvd_mask)
- << shadow_nonpresent_or_rsvd_mask_len;
+ << SHADOW_NONPRESENT_OR_RSVD_MASK_LEN;
return mask;
}
!spte_can_locklessly_be_made_writable(spte),
"kvm: Writable SPTE is not locklessly dirty-trackable\n");
- WARN_ONCE(spte & (shadow_acc_track_saved_bits_mask <<
- shadow_acc_track_saved_bits_shift),
+ WARN_ONCE(spte & (SHADOW_ACC_TRACK_SAVED_BITS_MASK <<
+ SHADOW_ACC_TRACK_SAVED_BITS_SHIFT),
"kvm: Access Tracking saved bit locations are not zero\n");
- spte |= (spte & shadow_acc_track_saved_bits_mask) <<
- shadow_acc_track_saved_bits_shift;
+ spte |= (spte & SHADOW_ACC_TRACK_SAVED_BITS_MASK) <<
+ SHADOW_ACC_TRACK_SAVED_BITS_SHIFT;
spte &= ~shadow_acc_track_mask;
return spte;
void kvm_mmu_set_mmio_spte_mask(u64 mmio_value, u64 access_mask)
{
BUG_ON((u64)(unsigned)access_mask != access_mask);
- WARN_ON(mmio_value & (shadow_nonpresent_or_rsvd_mask << shadow_nonpresent_or_rsvd_mask_len));
+ WARN_ON(mmio_value & (shadow_nonpresent_or_rsvd_mask << SHADOW_NONPRESENT_OR_RSVD_MASK_LEN));
WARN_ON(mmio_value & shadow_nonpresent_or_rsvd_lower_gfn_mask);
shadow_mmio_value = mmio_value | SPTE_MMIO_MASK;
shadow_mmio_access_mask = access_mask;
low_phys_bits = boot_cpu_data.x86_phys_bits;
if (boot_cpu_has_bug(X86_BUG_L1TF) &&
!WARN_ON_ONCE(boot_cpu_data.x86_cache_bits >=
- 52 - shadow_nonpresent_or_rsvd_mask_len)) {
+ 52 - SHADOW_NONPRESENT_OR_RSVD_MASK_LEN)) {
low_phys_bits = boot_cpu_data.x86_cache_bits
- - shadow_nonpresent_or_rsvd_mask_len;
+ - SHADOW_NONPRESENT_OR_RSVD_MASK_LEN;
shadow_nonpresent_or_rsvd_mask =
rsvd_bits(low_phys_bits, boot_cpu_data.x86_cache_bits - 1);
}
*/
extern u64 __read_mostly shadow_nonpresent_or_rsvd_mask;
+/*
+ * The number of high-order 1 bits to use in the mask above.
+ */
+#define SHADOW_NONPRESENT_OR_RSVD_MASK_LEN 5
+
/*
* The mask/shift to use for saving the original R/X bits when marking the PTE
* as not-present for access tracking purposes. We do not save the W bit as the
* PTEs being access tracked also need to be dirty tracked, so the W bit will be
* restored only when a write is attempted to the page.
*/
-static const u64 shadow_acc_track_saved_bits_mask = PT64_EPT_READABLE_MASK |
- PT64_EPT_EXECUTABLE_MASK;
-static const u64 shadow_acc_track_saved_bits_shift = PT64_SECOND_AVAIL_BITS_SHIFT;
-
-/*
- * The number of high-order 1 bits to use in the mask above.
- */
-static const u64 shadow_nonpresent_or_rsvd_mask_len = 5;
+#define SHADOW_ACC_TRACK_SAVED_BITS_MASK (PT64_EPT_READABLE_MASK | \
+ PT64_EPT_EXECUTABLE_MASK)
+#define SHADOW_ACC_TRACK_SAVED_BITS_SHIFT PT64_SECOND_AVAIL_BITS_SHIFT
/*
* In some cases, we need to preserve the GFN of a non-present or reserved
};
const unsigned int nr_evmcs_1_fields = ARRAY_SIZE(vmcs_field_to_evmcs_1);
-void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf)
+__init void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf)
{
vmcs_conf->pin_based_exec_ctrl &= ~EVMCS1_UNSUPPORTED_PINCTRL;
vmcs_conf->cpu_based_2nd_exec_ctrl &= ~EVMCS1_UNSUPPORTED_2NDEXEC;
vmcs_conf->vmexit_ctrl &= ~EVMCS1_UNSUPPORTED_VMEXIT_CTRL;
vmcs_conf->vmentry_ctrl &= ~EVMCS1_UNSUPPORTED_VMENTRY_CTRL;
-
}
#endif
vp_ap->enlighten_vmentry = 1;
}
-void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf);
+__init void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf);
#else /* !IS_ENABLED(CONFIG_HYPERV) */
static inline void evmcs_write64(unsigned long field, u64 value) {}
static inline void evmcs_write32(unsigned long field, u32 value) {}
static inline u32 evmcs_read32(unsigned long field) { return 0; }
static inline u16 evmcs_read16(unsigned long field) { return 0; }
static inline void evmcs_load(u64 phys_addr) {}
-static inline void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf) {}
static inline void evmcs_touch_msr_bitmap(void) {}
#endif /* IS_ENABLED(CONFIG_HYPERV) */
vmcs_conf->vmexit_ctrl = _vmexit_control;
vmcs_conf->vmentry_ctrl = _vmentry_control;
- if (static_branch_unlikely(&enable_evmcs))
+#if IS_ENABLED(CONFIG_HYPERV)
+ if (enlightened_vmcs)
evmcs_sanitize_exec_ctrls(vmcs_conf);
+#endif
return 0;
}
static int vmx_create_vcpu(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx;
- unsigned long *msr_bitmap;
int i, cpu, err;
BUILD_BUG_ON(offsetof(struct vcpu_vmx, vcpu) != 0);
bitmap_fill(vmx->shadow_msr_intercept.read, MAX_POSSIBLE_PASSTHROUGH_MSRS);
bitmap_fill(vmx->shadow_msr_intercept.write, MAX_POSSIBLE_PASSTHROUGH_MSRS);
- msr_bitmap = vmx->vmcs01.msr_bitmap;
vmx_disable_intercept_for_msr(vcpu, MSR_IA32_TSC, MSR_TYPE_R);
vmx_disable_intercept_for_msr(vcpu, MSR_FS_BASE, MSR_TYPE_RW);
vmx_disable_intercept_for_msr(vcpu, MSR_GS_BASE, MSR_TYPE_RW);
if (ignore_msrs) {
if (report_ignored_msrs)
- vcpu_unimpl(vcpu, "ignored %s: 0x%x data 0x%llx\n",
- op, msr, data);
+ kvm_pr_unimpl("ignored %s: 0x%x data 0x%llx\n",
+ op, msr, data);
/* Mask the error */
return 0;
} else {
- vcpu_debug_ratelimited(vcpu, "unhandled %s: 0x%x data 0x%llx\n",
- op, msr, data);
+ kvm_debug_ratelimited("unhandled %s: 0x%x data 0x%llx\n",
+ op, msr, data);
return -ENOENT;
}
}
#include <sysdep/mcontext.h>
#include <sys/ucontext.h>
-void __section(".__syscall_stub")
+void __attribute__ ((__section__ (".__syscall_stub")))
stub_segv_handler(int sig, siginfo_t *info, void *p)
{
ucontext_t *uc = p;
ssize_t size, left;
unsigned len, i;
size_t offset;
+ int ret = 0;
if (WARN_ON_ONCE(!max_append_sectors))
return 0;
len = min_t(size_t, PAGE_SIZE - offset, left);
if (bio_add_hw_page(q, bio, page, len, offset,
- max_append_sectors, &same_page) != len)
- return -EINVAL;
+ max_append_sectors, &same_page) != len) {
+ ret = -EINVAL;
+ break;
+ }
if (same_page)
put_page(page);
offset = 0;
}
- iov_iter_advance(iter, size);
- return 0;
+ iov_iter_advance(iter, size - left);
+ return ret;
}
/**
goto fail;
}
+ if (radix_tree_preload(GFP_KERNEL)) {
+ blkg_free(new_blkg);
+ ret = -ENOMEM;
+ goto fail;
+ }
+
rcu_read_lock();
spin_lock_irq(&q->queue_lock);
blkg = blkg_lookup_check(pos, pol, q);
if (IS_ERR(blkg)) {
ret = PTR_ERR(blkg);
- goto fail_unlock;
+ blkg_free(new_blkg);
+ goto fail_preloaded;
}
if (blkg) {
blkg = blkg_create(pos, q, new_blkg);
if (IS_ERR(blkg)) {
ret = PTR_ERR(blkg);
- goto fail_unlock;
+ goto fail_preloaded;
}
}
+ radix_tree_preload_end();
+
if (pos == blkcg)
goto success;
}
ctx->body = input;
return 0;
+fail_preloaded:
+ radix_tree_preload_end();
fail_unlock:
spin_unlock_irq(&q->queue_lock);
rcu_read_unlock();
/* release the tag's ownership to the req cloned from */
spin_lock_irqsave(&fq->mq_flush_lock, flags);
+ WRITE_ONCE(flush_rq->state, MQ_RQ_IDLE);
if (!refcount_dec_and_test(&flush_rq->ref)) {
fq->rq_status = error;
spin_unlock_irqrestore(&fq->mq_flush_lock, flags);
/* Please keep this list sorted alphabetically by vendor and model */
static const struct dmi_system_id dmi_lid_quirks[] = {
- {
- /*
- * Acer Switch 10 SW5-012. _LID method messes with home and
- * power button GPIO IRQ settings causing an interrupt storm on
- * both GPIOs. This is unfixable without a DSDT override, so we
- * have to disable the lid-switch functionality altogether :|
- */
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
- DMI_MATCH(DMI_PRODUCT_NAME, "Aspire SW5-012"),
- },
- .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_DISABLED,
- },
{
/* GP-electronic T701, _LID method points to a floating GPIO */
.matches = {
* between them).
*/
list_for_each_entry_reverse(dd, &ds->dependent_devices, list)
- dock_hotplug_event(dd, ACPI_NOTIFY_EJECT_REQUEST, false);
+ dock_hotplug_event(dd, ACPI_NOTIFY_EJECT_REQUEST,
+ DOCK_CALL_HANDLER);
list_for_each_entry_reverse(dd, &ds->dependent_devices, list)
acpi_bus_trim(dd->adev);
le16_to_cpu(nfit_dcr->dcr->code));
break;
}
- if (rc != ENXIO)
+ if (rc != -ENXIO)
break;
}
mutex_unlock(&acpi_desc->init_mutex);
pp->dhfis_bits &= ~done_mask;
pp->dmafis_bits &= ~done_mask;
pp->sdbfis_bits |= done_mask;
- ata_qc_complete_multiple(ap, ap->qc_active ^ done_mask);
+ ata_qc_complete_multiple(ap, ata_qc_get_active(ap) ^ done_mask);
if (!ap->qc_active) {
DPRINTK("over\n");
*/
void set_primary_fwnode(struct device *dev, struct fwnode_handle *fwnode)
{
+ struct device *parent = dev->parent;
struct fwnode_handle *fn = dev->fwnode;
if (fwnode) {
} else {
if (fwnode_is_primary(fn)) {
dev->fwnode = fn->secondary;
- fn->secondary = NULL;
+ if (!(parent && fn == parent->fwnode))
+ fn->secondary = ERR_PTR(-ENODEV);
} else {
dev->fwnode = NULL;
}
}
}
-static void nbd_size_update(struct nbd_device *nbd)
+static void nbd_size_update(struct nbd_device *nbd, bool start)
{
struct nbd_config *config = nbd->config;
struct block_device *bdev = bdget_disk(nbd->disk, 0);
if (bdev) {
if (bdev->bd_disk) {
bd_set_nr_sectors(bdev, nr_sectors);
- set_blocksize(bdev, config->blksize);
+ if (start)
+ set_blocksize(bdev, config->blksize);
} else
set_bit(GD_NEED_PART_SCAN, &nbd->disk->state);
bdput(bdev);
config->blksize = blocksize;
config->bytesize = blocksize * nr_blocks;
if (nbd->task_recv != NULL)
- nbd_size_update(nbd);
+ nbd_size_update(nbd, false);
}
static void nbd_complete_rq(struct request *req)
args->index = i;
queue_work(nbd->recv_workq, &args->work);
}
- nbd_size_update(nbd);
+ nbd_size_update(nbd, true);
return error;
}
unsigned int nr_zones_closed;
struct blk_zone *zones;
sector_t zone_size_sects;
+ spinlock_t zone_dev_lock;
+ unsigned long *zone_locks;
unsigned long size; /* device size in MB */
unsigned long completion_nsec; /* time in ns to complete a request */
// SPDX-License-Identifier: GPL-2.0
#include <linux/vmalloc.h>
+#include <linux/bitmap.h>
#include "null_blk.h"
#define CREATE_TRACE_POINTS
if (!dev->zones)
return -ENOMEM;
+ spin_lock_init(&dev->zone_dev_lock);
+ dev->zone_locks = bitmap_zalloc(dev->nr_zones, GFP_KERNEL);
+ if (!dev->zone_locks) {
+ kvfree(dev->zones);
+ return -ENOMEM;
+ }
+
if (dev->zone_nr_conv >= dev->nr_zones) {
dev->zone_nr_conv = dev->nr_zones - 1;
pr_info("changed the number of conventional zones to %u",
void null_free_zoned_dev(struct nullb_device *dev)
{
+ bitmap_free(dev->zone_locks);
kvfree(dev->zones);
}
+static inline void null_lock_zone(struct nullb_device *dev, unsigned int zno)
+{
+ wait_on_bit_lock_io(dev->zone_locks, zno, TASK_UNINTERRUPTIBLE);
+}
+
+static inline void null_unlock_zone(struct nullb_device *dev, unsigned int zno)
+{
+ clear_and_wake_up_bit(zno, dev->zone_locks);
+}
+
int null_report_zones(struct gendisk *disk, sector_t sector,
unsigned int nr_zones, report_zones_cb cb, void *data)
{
struct nullb *nullb = disk->private_data;
struct nullb_device *dev = nullb->dev;
- unsigned int first_zone, i;
+ unsigned int first_zone, i, zno;
struct blk_zone zone;
int error;
nr_zones = min(nr_zones, dev->nr_zones - first_zone);
trace_nullb_report_zones(nullb, nr_zones);
- for (i = 0; i < nr_zones; i++) {
+ zno = first_zone;
+ for (i = 0; i < nr_zones; i++, zno++) {
/*
* Stacked DM target drivers will remap the zone information by
* modifying the zone information passed to the report callback.
* So use a local copy to avoid corruption of the device zone
* array.
*/
- memcpy(&zone, &dev->zones[first_zone + i],
- sizeof(struct blk_zone));
+ null_lock_zone(dev, zno);
+ memcpy(&zone, &dev->zones[zno], sizeof(struct blk_zone));
+ null_unlock_zone(dev, zno);
+
error = cb(&zone, i, data);
if (error)
return error;
return nr_zones;
}
+/*
+ * This is called in the case of memory backing from null_process_cmd()
+ * with the target zone already locked.
+ */
size_t null_zone_valid_read_len(struct nullb *nullb,
sector_t sector, unsigned int len)
{
if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
return null_process_cmd(cmd, REQ_OP_WRITE, sector, nr_sectors);
+ null_lock_zone(dev, zno);
+ spin_lock(&dev->zone_dev_lock);
+
switch (zone->cond) {
case BLK_ZONE_COND_FULL:
/* Cannot write to a full zone */
- return BLK_STS_IOERR;
+ ret = BLK_STS_IOERR;
+ goto unlock;
case BLK_ZONE_COND_EMPTY:
case BLK_ZONE_COND_CLOSED:
ret = null_check_zone_resources(dev, zone);
if (ret != BLK_STS_OK)
- return ret;
+ goto unlock;
break;
case BLK_ZONE_COND_IMP_OPEN:
case BLK_ZONE_COND_EXP_OPEN:
break;
default:
/* Invalid zone condition */
- return BLK_STS_IOERR;
+ ret = BLK_STS_IOERR;
+ goto unlock;
}
/*
else
cmd->rq->__sector = sector;
} else if (sector != zone->wp) {
- return BLK_STS_IOERR;
+ ret = BLK_STS_IOERR;
+ goto unlock;
}
- if (zone->wp + nr_sectors > zone->start + zone->capacity)
- return BLK_STS_IOERR;
+ if (zone->wp + nr_sectors > zone->start + zone->capacity) {
+ ret = BLK_STS_IOERR;
+ goto unlock;
+ }
if (zone->cond == BLK_ZONE_COND_CLOSED) {
dev->nr_zones_closed--;
if (zone->cond != BLK_ZONE_COND_EXP_OPEN)
zone->cond = BLK_ZONE_COND_IMP_OPEN;
+ spin_unlock(&dev->zone_dev_lock);
ret = null_process_cmd(cmd, REQ_OP_WRITE, sector, nr_sectors);
+ spin_lock(&dev->zone_dev_lock);
if (ret != BLK_STS_OK)
- return ret;
+ goto unlock;
zone->wp += nr_sectors;
if (zone->wp == zone->start + zone->capacity) {
dev->nr_zones_imp_open--;
zone->cond = BLK_ZONE_COND_FULL;
}
- return BLK_STS_OK;
+ ret = BLK_STS_OK;
+
+unlock:
+ spin_unlock(&dev->zone_dev_lock);
+ null_unlock_zone(dev, zno);
+
+ return ret;
}
static blk_status_t null_open_zone(struct nullb_device *dev, struct blk_zone *zone)
sector_t sector)
{
struct nullb_device *dev = cmd->nq->dev;
- unsigned int zone_no = null_zone_no(dev, sector);
- struct blk_zone *zone = &dev->zones[zone_no];
- blk_status_t ret = BLK_STS_OK;
+ unsigned int zone_no;
+ struct blk_zone *zone;
+ blk_status_t ret;
size_t i;
+ if (op == REQ_OP_ZONE_RESET_ALL) {
+ for (i = dev->zone_nr_conv; i < dev->nr_zones; i++) {
+ null_lock_zone(dev, i);
+ zone = &dev->zones[i];
+ if (zone->cond != BLK_ZONE_COND_EMPTY) {
+ spin_lock(&dev->zone_dev_lock);
+ null_reset_zone(dev, zone);
+ spin_unlock(&dev->zone_dev_lock);
+ trace_nullb_zone_op(cmd, i, zone->cond);
+ }
+ null_unlock_zone(dev, i);
+ }
+ return BLK_STS_OK;
+ }
+
+ zone_no = null_zone_no(dev, sector);
+ zone = &dev->zones[zone_no];
+
+ null_lock_zone(dev, zone_no);
+ spin_lock(&dev->zone_dev_lock);
+
switch (op) {
- case REQ_OP_ZONE_RESET_ALL:
- for (i = dev->zone_nr_conv; i < dev->nr_zones; i++)
- null_reset_zone(dev, &dev->zones[i]);
- break;
case REQ_OP_ZONE_RESET:
ret = null_reset_zone(dev, zone);
break;
ret = null_finish_zone(dev, zone);
break;
default:
- return BLK_STS_NOTSUPP;
+ ret = BLK_STS_NOTSUPP;
+ break;
}
+ spin_unlock(&dev->zone_dev_lock);
+
if (ret == BLK_STS_OK)
trace_nullb_zone_op(cmd, zone_no, zone->cond);
+ null_unlock_zone(dev, zone_no);
+
return ret;
}
blk_status_t null_process_zoned_cmd(struct nullb_cmd *cmd, enum req_opf op,
sector_t sector, sector_t nr_sectors)
{
+ struct nullb_device *dev = cmd->nq->dev;
+ unsigned int zno = null_zone_no(dev, sector);
+ blk_status_t sts;
+
switch (op) {
case REQ_OP_WRITE:
- return null_zone_write(cmd, sector, nr_sectors, false);
+ sts = null_zone_write(cmd, sector, nr_sectors, false);
+ break;
case REQ_OP_ZONE_APPEND:
- return null_zone_write(cmd, sector, nr_sectors, true);
+ sts = null_zone_write(cmd, sector, nr_sectors, true);
+ break;
case REQ_OP_ZONE_RESET:
case REQ_OP_ZONE_RESET_ALL:
case REQ_OP_ZONE_OPEN:
case REQ_OP_ZONE_CLOSE:
case REQ_OP_ZONE_FINISH:
- return null_zone_mgmt(cmd, op, sector);
+ sts = null_zone_mgmt(cmd, op, sector);
+ break;
default:
- return null_process_cmd(cmd, op, sector, nr_sectors);
+ null_lock_zone(dev, zno);
+ sts = null_process_cmd(cmd, op, sector, nr_sectors);
+ null_unlock_zone(dev, zno);
}
+
+ return sts;
}
#define ACE_FSM_NUM_STATES 11
/* Set flag to exit FSM loop and reschedule tasklet */
-static inline void ace_fsm_yield(struct ace_device *ace)
+static inline void ace_fsm_yieldpoll(struct ace_device *ace)
{
- dev_dbg(ace->dev, "ace_fsm_yield()\n");
tasklet_schedule(&ace->fsm_tasklet);
ace->fsm_continue_flag = 0;
}
+static inline void ace_fsm_yield(struct ace_device *ace)
+{
+ dev_dbg(ace->dev, "%s()\n", __func__);
+ ace_fsm_yieldpoll(ace);
+}
+
/* Set flag to exit FSM loop and wait for IRQ to reschedule tasklet */
static inline void ace_fsm_yieldirq(struct ace_device *ace)
{
dev_dbg(ace->dev, "ace_fsm_yieldirq()\n");
- if (!ace->irq)
- /* No IRQ assigned, so need to poll */
- tasklet_schedule(&ace->fsm_tasklet);
- ace->fsm_continue_flag = 0;
+ if (ace->irq > 0)
+ ace->fsm_continue_flag = 0;
+ else
+ ace_fsm_yieldpoll(ace);
}
static bool ace_has_next_request(struct request_queue *q)
ACE_CTRL_DATABUFRDYIRQ | ACE_CTRL_ERRORIRQ);
/* Now we can hook up the irq handler */
- if (ace->irq) {
+ if (ace->irq > 0) {
rc = request_irq(ace->irq, ace_interrupt, 0, "systemace", ace);
if (rc) {
/* Failure - fall back to polled mode */
dev_err(ace->dev, "request_irq failed\n");
- ace->irq = 0;
+ ace->irq = rc;
}
}
tasklet_kill(&ace->fsm_tasklet);
- if (ace->irq)
+ if (ace->irq > 0)
free_irq(ace->irq, ace);
iounmap(ace->baseaddr);
int rc;
dev_dbg(dev, "ace_alloc(%p)\n", dev);
- if (!physaddr) {
- rc = -ENODEV;
- goto err_noreg;
- }
-
/* Allocate and initialize the ace device structure */
ace = kzalloc(sizeof(struct ace_device), GFP_KERNEL);
if (!ace) {
dev_set_drvdata(dev, NULL);
kfree(ace);
err_alloc:
-err_noreg:
dev_err(dev, "could not initialize device, err=%i\n", rc);
return rc;
}
static int ace_probe(struct platform_device *dev)
{
- resource_size_t physaddr = 0;
int bus_width = ACE_BUS_WIDTH_16; /* FIXME: should not be hard coded */
+ resource_size_t physaddr;
+ struct resource *res;
u32 id = dev->id;
- int irq = 0;
+ int irq;
int i;
dev_dbg(&dev->dev, "ace_probe(%p)\n", dev);
if (of_find_property(dev->dev.of_node, "8-bit", NULL))
bus_width = ACE_BUS_WIDTH_8;
- for (i = 0; i < dev->num_resources; i++) {
- if (dev->resource[i].flags & IORESOURCE_MEM)
- physaddr = dev->resource[i].start;
- if (dev->resource[i].flags & IORESOURCE_IRQ)
- irq = dev->resource[i].start;
- }
+ res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EINVAL;
+
+ physaddr = res->start;
+ if (!physaddr)
+ return -ENODEV;
+
+ irq = platform_get_irq_optional(dev, 0);
/* Call the bus-independent setup code */
return ace_alloc(&dev->dev, id, physaddr, irq, bus_width);
struct intel_tlv {
u8 type;
u8 len;
- u8 val[0];
+ u8 val[];
} __packed;
struct intel_version_tlv {
config CPU_FREQ_DEFAULT_GOV_ONDEMAND
bool "ondemand"
+ depends on !(X86_INTEL_PSTATE && SMP)
select CPU_FREQ_GOV_ONDEMAND
select CPU_FREQ_GOV_PERFORMANCE
help
config CPU_FREQ_DEFAULT_GOV_CONSERVATIVE
bool "conservative"
+ depends on !(X86_INTEL_PSTATE && SMP)
select CPU_FREQ_GOV_CONSERVATIVE
select CPU_FREQ_GOV_PERFORMANCE
help
}
}
+/**
+ * cpufreq_driver_test_flags - Test cpufreq driver's flags against given ones.
+ * @flags: Flags to test against the current cpufreq driver's flags.
+ *
+ * Assumes that the driver is there, so callers must ensure that this is the
+ * case.
+ */
+bool cpufreq_driver_test_flags(u16 flags)
+{
+ return !!(cpufreq_driver->flags & flags);
+}
+
/**
* cpufreq_get_current_driver - return current driver's name
*
* exactly same freq is called again and so we can save on few function
* calls.
*/
- if (target_freq == policy->cur)
+ if (target_freq == policy->cur &&
+ !(cpufreq_driver->flags & CPUFREQ_NEED_UPDATE_LIMITS))
return 0;
/* Save last value to restore later on errors */
case EPS_BRAND_C3:
pr_cont("C3\n");
return -ENODEV;
- break;
}
/* Enable Enhanced PowerSaver */
rdmsrl(MSR_IA32_MISC_ENABLE, val);
int old_pstate = cpu->pstate.current_pstate;
target_pstate = intel_pstate_prepare_request(cpu, target_pstate);
- if (target_pstate != old_pstate) {
+ if (hwp_active) {
+ intel_cpufreq_adjust_hwp(cpu, target_pstate, fast_switch);
+ cpu->pstate.current_pstate = target_pstate;
+ } else if (target_pstate != old_pstate) {
+ intel_cpufreq_adjust_perf_ctl(cpu, target_pstate, fast_switch);
cpu->pstate.current_pstate = target_pstate;
- if (hwp_active)
- intel_cpufreq_adjust_hwp(cpu, target_pstate,
- fast_switch);
- else
- intel_cpufreq_adjust_perf_ctl(cpu, target_pstate,
- fast_switch);
}
intel_cpufreq_trace(cpu, fast_switch ? INTEL_PSTATE_TRACE_FAST_SWITCH :
hwp_mode_bdw = id->driver_data;
intel_pstate.attr = hwp_cpufreq_attrs;
intel_cpufreq.attr = hwp_cpufreq_attrs;
+ intel_cpufreq.flags |= CPUFREQ_NEED_UPDATE_LIMITS;
if (!default_driver)
default_driver = &intel_pstate;
break;
default:
return;
- break;
}
if (min_vid_speed >= highest_speed)
return;
return pentium3_get_frequency(processor);
default:
return 0;
- };
+ }
return 0;
}
EXPORT_SYMBOL_GPL(speedstep_get_frequency);
help
Enable support for the Intel(R) IOP Series RAID engines.
-config INTEL_MIC_X100_DMA
- tristate "Intel MIC X100 DMA Driver"
- depends on 64BIT && X86 && INTEL_MIC_BUS
- select DMA_ENGINE
- help
- This enables DMA support for the Intel Many Integrated Core
- (MIC) family of PCIe form factor coprocessor X100 devices that
- run a 64 bit Linux OS. This driver will be used by both MIC
- host and card drivers.
-
- If you are building host kernel with a MIC device or a card
- kernel for a MIC device, then say M (recommended) or Y, else
- say N. If unsure say N.
-
- More information about the Intel MIC family as well as the Linux
- OS and tools for MIC to use with this driver are available from
- <http://software.intel.com/en-us/mic-developer>.
-
config K3_DMA
tristate "Hisilicon K3 DMA support"
depends on ARCH_HI3xxx || ARCH_HISI || COMPILE_TEST
obj-$(CONFIG_INTEL_IOATDMA) += ioat/
obj-$(CONFIG_INTEL_IDXD) += idxd/
obj-$(CONFIG_INTEL_IOP_ADMA) += iop-adma.o
-obj-$(CONFIG_INTEL_MIC_X100_DMA) += mic_x100_dma.o
obj-$(CONFIG_K3_DMA) += k3dma.o
obj-$(CONFIG_LPC18XX_DMAMUX) += lpc18xx-dmamux.o
obj-$(CONFIG_MILBEAUT_HDMAC) += milbeaut-hdmac.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel MIC X100 DMA Driver.
- *
- * Adapted from IOAT dma driver.
- */
-#include <linux/module.h>
-#include <linux/io.h>
-#include <linux/seq_file.h>
-#include <linux/vmalloc.h>
-
-#include "mic_x100_dma.h"
-
-#define MIC_DMA_MAX_XFER_SIZE_CARD (1 * 1024 * 1024 -\
- MIC_DMA_ALIGN_BYTES)
-#define MIC_DMA_MAX_XFER_SIZE_HOST (1 * 1024 * 1024 >> 1)
-#define MIC_DMA_DESC_TYPE_SHIFT 60
-#define MIC_DMA_MEMCPY_LEN_SHIFT 46
-#define MIC_DMA_STAT_INTR_SHIFT 59
-
-/* high-water mark for pushing dma descriptors */
-static int mic_dma_pending_level = 4;
-
-/* Status descriptor is used to write a 64 bit value to a memory location */
-enum mic_dma_desc_format_type {
- MIC_DMA_MEMCPY = 1,
- MIC_DMA_STATUS,
-};
-
-static inline u32 mic_dma_hw_ring_inc(u32 val)
-{
- return (val + 1) % MIC_DMA_DESC_RX_SIZE;
-}
-
-static inline u32 mic_dma_hw_ring_dec(u32 val)
-{
- return val ? val - 1 : MIC_DMA_DESC_RX_SIZE - 1;
-}
-
-static inline void mic_dma_hw_ring_inc_head(struct mic_dma_chan *ch)
-{
- ch->head = mic_dma_hw_ring_inc(ch->head);
-}
-
-/* Prepare a memcpy desc */
-static inline void mic_dma_memcpy_desc(struct mic_dma_desc *desc,
- dma_addr_t src_phys, dma_addr_t dst_phys, u64 size)
-{
- u64 qw0, qw1;
-
- qw0 = src_phys;
- qw0 |= (size >> MIC_DMA_ALIGN_SHIFT) << MIC_DMA_MEMCPY_LEN_SHIFT;
- qw1 = MIC_DMA_MEMCPY;
- qw1 <<= MIC_DMA_DESC_TYPE_SHIFT;
- qw1 |= dst_phys;
- desc->qw0 = qw0;
- desc->qw1 = qw1;
-}
-
-/* Prepare a status desc. with @data to be written at @dst_phys */
-static inline void mic_dma_prep_status_desc(struct mic_dma_desc *desc, u64 data,
- dma_addr_t dst_phys, bool generate_intr)
-{
- u64 qw0, qw1;
-
- qw0 = data;
- qw1 = (u64) MIC_DMA_STATUS << MIC_DMA_DESC_TYPE_SHIFT | dst_phys;
- if (generate_intr)
- qw1 |= (1ULL << MIC_DMA_STAT_INTR_SHIFT);
- desc->qw0 = qw0;
- desc->qw1 = qw1;
-}
-
-static void mic_dma_cleanup(struct mic_dma_chan *ch)
-{
- struct dma_async_tx_descriptor *tx;
- u32 tail;
- u32 last_tail;
-
- spin_lock(&ch->cleanup_lock);
- tail = mic_dma_read_cmp_cnt(ch);
- /*
- * This is the barrier pair for smp_wmb() in fn.
- * mic_dma_tx_submit_unlock. It's required so that we read the
- * updated cookie value from tx->cookie.
- */
- smp_rmb();
- for (last_tail = ch->last_tail; tail != last_tail;) {
- tx = &ch->tx_array[last_tail];
- if (tx->cookie) {
- dma_cookie_complete(tx);
- dmaengine_desc_get_callback_invoke(tx, NULL);
- tx->callback = NULL;
- }
- last_tail = mic_dma_hw_ring_inc(last_tail);
- }
- /* finish all completion callbacks before incrementing tail */
- smp_mb();
- ch->last_tail = last_tail;
- spin_unlock(&ch->cleanup_lock);
-}
-
-static u32 mic_dma_ring_count(u32 head, u32 tail)
-{
- u32 count;
-
- if (head >= tail)
- count = (tail - 0) + (MIC_DMA_DESC_RX_SIZE - head);
- else
- count = tail - head;
- return count - 1;
-}
-
-/* Returns the num. of free descriptors on success, -ENOMEM on failure */
-static int mic_dma_avail_desc_ring_space(struct mic_dma_chan *ch, int required)
-{
- struct device *dev = mic_dma_ch_to_device(ch);
- u32 count;
-
- count = mic_dma_ring_count(ch->head, ch->last_tail);
- if (count < required) {
- mic_dma_cleanup(ch);
- count = mic_dma_ring_count(ch->head, ch->last_tail);
- }
-
- if (count < required) {
- dev_dbg(dev, "Not enough desc space");
- dev_dbg(dev, "%s %d required=%u, avail=%u\n",
- __func__, __LINE__, required, count);
- return -ENOMEM;
- } else {
- return count;
- }
-}
-
-/* Program memcpy descriptors into the descriptor ring and update s/w head ptr*/
-static int mic_dma_prog_memcpy_desc(struct mic_dma_chan *ch, dma_addr_t src,
- dma_addr_t dst, size_t len)
-{
- size_t current_transfer_len;
- size_t max_xfer_size = to_mic_dma_dev(ch)->max_xfer_size;
- /* 3 is added to make sure we have enough space for status desc */
- int num_desc = len / max_xfer_size + 3;
- int ret;
-
- if (len % max_xfer_size)
- num_desc++;
-
- ret = mic_dma_avail_desc_ring_space(ch, num_desc);
- if (ret < 0)
- return ret;
- do {
- current_transfer_len = min(len, max_xfer_size);
- mic_dma_memcpy_desc(&ch->desc_ring[ch->head],
- src, dst, current_transfer_len);
- mic_dma_hw_ring_inc_head(ch);
- len -= current_transfer_len;
- dst = dst + current_transfer_len;
- src = src + current_transfer_len;
- } while (len > 0);
- return 0;
-}
-
-/* It's a h/w quirk and h/w needs 2 status descriptors for every status desc */
-static void mic_dma_prog_intr(struct mic_dma_chan *ch)
-{
- mic_dma_prep_status_desc(&ch->desc_ring[ch->head], 0,
- ch->status_dest_micpa, false);
- mic_dma_hw_ring_inc_head(ch);
- mic_dma_prep_status_desc(&ch->desc_ring[ch->head], 0,
- ch->status_dest_micpa, true);
- mic_dma_hw_ring_inc_head(ch);
-}
-
-/* Wrapper function to program memcpy descriptors/status descriptors */
-static int mic_dma_do_dma(struct mic_dma_chan *ch, int flags, dma_addr_t src,
- dma_addr_t dst, size_t len)
-{
- if (len && -ENOMEM == mic_dma_prog_memcpy_desc(ch, src, dst, len)) {
- return -ENOMEM;
- } else {
- /* 3 is the maximum number of status descriptors */
- int ret = mic_dma_avail_desc_ring_space(ch, 3);
-
- if (ret < 0)
- return ret;
- }
-
- /* Above mic_dma_prog_memcpy_desc() makes sure we have enough space */
- if (flags & DMA_PREP_FENCE) {
- mic_dma_prep_status_desc(&ch->desc_ring[ch->head], 0,
- ch->status_dest_micpa, false);
- mic_dma_hw_ring_inc_head(ch);
- }
-
- if (flags & DMA_PREP_INTERRUPT)
- mic_dma_prog_intr(ch);
-
- return 0;
-}
-
-static inline void mic_dma_issue_pending(struct dma_chan *ch)
-{
- struct mic_dma_chan *mic_ch = to_mic_dma_chan(ch);
-
- spin_lock(&mic_ch->issue_lock);
- /*
- * Write to head triggers h/w to act on the descriptors.
- * On MIC, writing the same head value twice causes
- * a h/w error. On second write, h/w assumes we filled
- * the entire ring & overwrote some of the descriptors.
- */
- if (mic_ch->issued == mic_ch->submitted)
- goto out;
- mic_ch->issued = mic_ch->submitted;
- /*
- * make descriptor updates visible before advancing head,
- * this is purposefully not smp_wmb() since we are also
- * publishing the descriptor updates to a dma device
- */
- wmb();
- mic_dma_write_reg(mic_ch, MIC_DMA_REG_DHPR, mic_ch->issued);
-out:
- spin_unlock(&mic_ch->issue_lock);
-}
-
-static inline void mic_dma_update_pending(struct mic_dma_chan *ch)
-{
- if (mic_dma_ring_count(ch->issued, ch->submitted)
- > mic_dma_pending_level)
- mic_dma_issue_pending(&ch->api_ch);
-}
-
-static dma_cookie_t mic_dma_tx_submit_unlock(struct dma_async_tx_descriptor *tx)
-{
- struct mic_dma_chan *mic_ch = to_mic_dma_chan(tx->chan);
- dma_cookie_t cookie;
-
- dma_cookie_assign(tx);
- cookie = tx->cookie;
- /*
- * We need an smp write barrier here because another CPU might see
- * an update to submitted and update h/w head even before we
- * assigned a cookie to this tx.
- */
- smp_wmb();
- mic_ch->submitted = mic_ch->head;
- spin_unlock(&mic_ch->prep_lock);
- mic_dma_update_pending(mic_ch);
- return cookie;
-}
-
-static inline struct dma_async_tx_descriptor *
-allocate_tx(struct mic_dma_chan *ch)
-{
- u32 idx = mic_dma_hw_ring_dec(ch->head);
- struct dma_async_tx_descriptor *tx = &ch->tx_array[idx];
-
- dma_async_tx_descriptor_init(tx, &ch->api_ch);
- tx->tx_submit = mic_dma_tx_submit_unlock;
- return tx;
-}
-
-/* Program a status descriptor with dst as address and value to be written */
-static struct dma_async_tx_descriptor *
-mic_dma_prep_status_lock(struct dma_chan *ch, dma_addr_t dst, u64 src_val,
- unsigned long flags)
-{
- struct mic_dma_chan *mic_ch = to_mic_dma_chan(ch);
- int result;
-
- spin_lock(&mic_ch->prep_lock);
- result = mic_dma_avail_desc_ring_space(mic_ch, 4);
- if (result < 0)
- goto error;
- mic_dma_prep_status_desc(&mic_ch->desc_ring[mic_ch->head], src_val, dst,
- false);
- mic_dma_hw_ring_inc_head(mic_ch);
- result = mic_dma_do_dma(mic_ch, flags, 0, 0, 0);
- if (result < 0)
- goto error;
-
- return allocate_tx(mic_ch);
-error:
- dev_err(mic_dma_ch_to_device(mic_ch),
- "Error enqueueing dma status descriptor, error=%d\n", result);
- spin_unlock(&mic_ch->prep_lock);
- return NULL;
-}
-
-/*
- * Prepare a memcpy descriptor to be added to the ring.
- * Note that the temporary descriptor adds an extra overhead of copying the
- * descriptor to ring. So, we copy directly to the descriptor ring
- */
-static struct dma_async_tx_descriptor *
-mic_dma_prep_memcpy_lock(struct dma_chan *ch, dma_addr_t dma_dest,
- dma_addr_t dma_src, size_t len, unsigned long flags)
-{
- struct mic_dma_chan *mic_ch = to_mic_dma_chan(ch);
- struct device *dev = mic_dma_ch_to_device(mic_ch);
- int result;
-
- if (!len && !flags)
- return NULL;
-
- spin_lock(&mic_ch->prep_lock);
- result = mic_dma_do_dma(mic_ch, flags, dma_src, dma_dest, len);
- if (result >= 0)
- return allocate_tx(mic_ch);
- dev_err(dev, "Error enqueueing dma, error=%d\n", result);
- spin_unlock(&mic_ch->prep_lock);
- return NULL;
-}
-
-static struct dma_async_tx_descriptor *
-mic_dma_prep_interrupt_lock(struct dma_chan *ch, unsigned long flags)
-{
- struct mic_dma_chan *mic_ch = to_mic_dma_chan(ch);
- int ret;
-
- spin_lock(&mic_ch->prep_lock);
- ret = mic_dma_do_dma(mic_ch, flags, 0, 0, 0);
- if (!ret)
- return allocate_tx(mic_ch);
- spin_unlock(&mic_ch->prep_lock);
- return NULL;
-}
-
-/* Return the status of the transaction */
-static enum dma_status
-mic_dma_tx_status(struct dma_chan *ch, dma_cookie_t cookie,
- struct dma_tx_state *txstate)
-{
- struct mic_dma_chan *mic_ch = to_mic_dma_chan(ch);
-
- if (DMA_COMPLETE != dma_cookie_status(ch, cookie, txstate))
- mic_dma_cleanup(mic_ch);
-
- return dma_cookie_status(ch, cookie, txstate);
-}
-
-static irqreturn_t mic_dma_thread_fn(int irq, void *data)
-{
- mic_dma_cleanup((struct mic_dma_chan *)data);
- return IRQ_HANDLED;
-}
-
-static irqreturn_t mic_dma_intr_handler(int irq, void *data)
-{
- struct mic_dma_chan *ch = ((struct mic_dma_chan *)data);
-
- mic_dma_ack_interrupt(ch);
- return IRQ_WAKE_THREAD;
-}
-
-static int mic_dma_alloc_desc_ring(struct mic_dma_chan *ch)
-{
- u64 desc_ring_size = MIC_DMA_DESC_RX_SIZE * sizeof(*ch->desc_ring);
- struct device *dev = &to_mbus_device(ch)->dev;
-
- desc_ring_size = ALIGN(desc_ring_size, MIC_DMA_ALIGN_BYTES);
- ch->desc_ring = kzalloc(desc_ring_size, GFP_KERNEL);
-
- if (!ch->desc_ring)
- return -ENOMEM;
-
- ch->desc_ring_micpa = dma_map_single(dev, ch->desc_ring,
- desc_ring_size, DMA_BIDIRECTIONAL);
- if (dma_mapping_error(dev, ch->desc_ring_micpa))
- goto map_error;
-
- ch->tx_array = vzalloc(array_size(MIC_DMA_DESC_RX_SIZE,
- sizeof(*ch->tx_array)));
- if (!ch->tx_array)
- goto tx_error;
- return 0;
-tx_error:
- dma_unmap_single(dev, ch->desc_ring_micpa, desc_ring_size,
- DMA_BIDIRECTIONAL);
-map_error:
- kfree(ch->desc_ring);
- return -ENOMEM;
-}
-
-static void mic_dma_free_desc_ring(struct mic_dma_chan *ch)
-{
- u64 desc_ring_size = MIC_DMA_DESC_RX_SIZE * sizeof(*ch->desc_ring);
-
- vfree(ch->tx_array);
- desc_ring_size = ALIGN(desc_ring_size, MIC_DMA_ALIGN_BYTES);
- dma_unmap_single(&to_mbus_device(ch)->dev, ch->desc_ring_micpa,
- desc_ring_size, DMA_BIDIRECTIONAL);
- kfree(ch->desc_ring);
- ch->desc_ring = NULL;
-}
-
-static void mic_dma_free_status_dest(struct mic_dma_chan *ch)
-{
- dma_unmap_single(&to_mbus_device(ch)->dev, ch->status_dest_micpa,
- L1_CACHE_BYTES, DMA_BIDIRECTIONAL);
- kfree(ch->status_dest);
-}
-
-static int mic_dma_alloc_status_dest(struct mic_dma_chan *ch)
-{
- struct device *dev = &to_mbus_device(ch)->dev;
-
- ch->status_dest = kzalloc(L1_CACHE_BYTES, GFP_KERNEL);
- if (!ch->status_dest)
- return -ENOMEM;
- ch->status_dest_micpa = dma_map_single(dev, ch->status_dest,
- L1_CACHE_BYTES, DMA_BIDIRECTIONAL);
- if (dma_mapping_error(dev, ch->status_dest_micpa)) {
- kfree(ch->status_dest);
- ch->status_dest = NULL;
- return -ENOMEM;
- }
- return 0;
-}
-
-static int mic_dma_check_chan(struct mic_dma_chan *ch)
-{
- if (mic_dma_read_reg(ch, MIC_DMA_REG_DCHERR) ||
- mic_dma_read_reg(ch, MIC_DMA_REG_DSTAT) & MIC_DMA_CHAN_QUIESCE) {
- mic_dma_disable_chan(ch);
- mic_dma_chan_mask_intr(ch);
- dev_err(mic_dma_ch_to_device(ch),
- "%s %d error setting up mic dma chan %d\n",
- __func__, __LINE__, ch->ch_num);
- return -EBUSY;
- }
- return 0;
-}
-
-static int mic_dma_chan_setup(struct mic_dma_chan *ch)
-{
- if (MIC_DMA_CHAN_MIC == ch->owner)
- mic_dma_chan_set_owner(ch);
- mic_dma_disable_chan(ch);
- mic_dma_chan_mask_intr(ch);
- mic_dma_write_reg(ch, MIC_DMA_REG_DCHERRMSK, 0);
- mic_dma_chan_set_desc_ring(ch);
- ch->last_tail = mic_dma_read_reg(ch, MIC_DMA_REG_DTPR);
- ch->head = ch->last_tail;
- ch->issued = 0;
- mic_dma_chan_unmask_intr(ch);
- mic_dma_enable_chan(ch);
- return mic_dma_check_chan(ch);
-}
-
-static void mic_dma_chan_destroy(struct mic_dma_chan *ch)
-{
- mic_dma_disable_chan(ch);
- mic_dma_chan_mask_intr(ch);
-}
-
-static int mic_dma_setup_irq(struct mic_dma_chan *ch)
-{
- ch->cookie =
- to_mbus_hw_ops(ch)->request_threaded_irq(to_mbus_device(ch),
- mic_dma_intr_handler, mic_dma_thread_fn,
- "mic dma_channel", ch, ch->ch_num);
- return PTR_ERR_OR_ZERO(ch->cookie);
-}
-
-static inline void mic_dma_free_irq(struct mic_dma_chan *ch)
-{
- to_mbus_hw_ops(ch)->free_irq(to_mbus_device(ch), ch->cookie, ch);
-}
-
-static int mic_dma_chan_init(struct mic_dma_chan *ch)
-{
- int ret = mic_dma_alloc_desc_ring(ch);
-
- if (ret)
- goto ring_error;
- ret = mic_dma_alloc_status_dest(ch);
- if (ret)
- goto status_error;
- ret = mic_dma_chan_setup(ch);
- if (ret)
- goto chan_error;
- return ret;
-chan_error:
- mic_dma_free_status_dest(ch);
-status_error:
- mic_dma_free_desc_ring(ch);
-ring_error:
- return ret;
-}
-
-static int mic_dma_drain_chan(struct mic_dma_chan *ch)
-{
- struct dma_async_tx_descriptor *tx;
- int err = 0;
- dma_cookie_t cookie;
-
- tx = mic_dma_prep_memcpy_lock(&ch->api_ch, 0, 0, 0, DMA_PREP_FENCE);
- if (!tx) {
- err = -ENOMEM;
- goto error;
- }
-
- cookie = tx->tx_submit(tx);
- if (dma_submit_error(cookie))
- err = -ENOMEM;
- else
- err = dma_sync_wait(&ch->api_ch, cookie);
- if (err) {
- dev_err(mic_dma_ch_to_device(ch), "%s %d TO chan 0x%x\n",
- __func__, __LINE__, ch->ch_num);
- err = -EIO;
- }
-error:
- mic_dma_cleanup(ch);
- return err;
-}
-
-static inline void mic_dma_chan_uninit(struct mic_dma_chan *ch)
-{
- mic_dma_chan_destroy(ch);
- mic_dma_cleanup(ch);
- mic_dma_free_status_dest(ch);
- mic_dma_free_desc_ring(ch);
-}
-
-static int mic_dma_init(struct mic_dma_device *mic_dma_dev,
- enum mic_dma_chan_owner owner)
-{
- int i, first_chan = mic_dma_dev->start_ch;
- struct mic_dma_chan *ch;
- int ret;
-
- for (i = first_chan; i < first_chan + MIC_DMA_NUM_CHAN; i++) {
- ch = &mic_dma_dev->mic_ch[i];
- ch->ch_num = i;
- ch->owner = owner;
- spin_lock_init(&ch->cleanup_lock);
- spin_lock_init(&ch->prep_lock);
- spin_lock_init(&ch->issue_lock);
- ret = mic_dma_setup_irq(ch);
- if (ret)
- goto error;
- }
- return 0;
-error:
- for (i = i - 1; i >= first_chan; i--)
- mic_dma_free_irq(ch);
- return ret;
-}
-
-static void mic_dma_uninit(struct mic_dma_device *mic_dma_dev)
-{
- int i, first_chan = mic_dma_dev->start_ch;
- struct mic_dma_chan *ch;
-
- for (i = first_chan; i < first_chan + MIC_DMA_NUM_CHAN; i++) {
- ch = &mic_dma_dev->mic_ch[i];
- mic_dma_free_irq(ch);
- }
-}
-
-static int mic_dma_alloc_chan_resources(struct dma_chan *ch)
-{
- int ret = mic_dma_chan_init(to_mic_dma_chan(ch));
- if (ret)
- return ret;
- return MIC_DMA_DESC_RX_SIZE;
-}
-
-static void mic_dma_free_chan_resources(struct dma_chan *ch)
-{
- struct mic_dma_chan *mic_ch = to_mic_dma_chan(ch);
- mic_dma_drain_chan(mic_ch);
- mic_dma_chan_uninit(mic_ch);
-}
-
-/* Set the fn. handlers and register the dma device with dma api */
-static int mic_dma_register_dma_device(struct mic_dma_device *mic_dma_dev,
- enum mic_dma_chan_owner owner)
-{
- int i, first_chan = mic_dma_dev->start_ch;
-
- dma_cap_zero(mic_dma_dev->dma_dev.cap_mask);
- /*
- * This dma engine is not capable of host memory to host memory
- * transfers
- */
- dma_cap_set(DMA_MEMCPY, mic_dma_dev->dma_dev.cap_mask);
-
- if (MIC_DMA_CHAN_HOST == owner)
- dma_cap_set(DMA_PRIVATE, mic_dma_dev->dma_dev.cap_mask);
- mic_dma_dev->dma_dev.device_alloc_chan_resources =
- mic_dma_alloc_chan_resources;
- mic_dma_dev->dma_dev.device_free_chan_resources =
- mic_dma_free_chan_resources;
- mic_dma_dev->dma_dev.device_tx_status = mic_dma_tx_status;
- mic_dma_dev->dma_dev.device_prep_dma_memcpy = mic_dma_prep_memcpy_lock;
- mic_dma_dev->dma_dev.device_prep_dma_imm_data =
- mic_dma_prep_status_lock;
- mic_dma_dev->dma_dev.device_prep_dma_interrupt =
- mic_dma_prep_interrupt_lock;
- mic_dma_dev->dma_dev.device_issue_pending = mic_dma_issue_pending;
- mic_dma_dev->dma_dev.copy_align = MIC_DMA_ALIGN_SHIFT;
- INIT_LIST_HEAD(&mic_dma_dev->dma_dev.channels);
- for (i = first_chan; i < first_chan + MIC_DMA_NUM_CHAN; i++) {
- mic_dma_dev->mic_ch[i].api_ch.device = &mic_dma_dev->dma_dev;
- dma_cookie_init(&mic_dma_dev->mic_ch[i].api_ch);
- list_add_tail(&mic_dma_dev->mic_ch[i].api_ch.device_node,
- &mic_dma_dev->dma_dev.channels);
- }
- return dmaenginem_async_device_register(&mic_dma_dev->dma_dev);
-}
-
-/*
- * Initializes dma channels and registers the dma device with the
- * dma engine api.
- */
-static struct mic_dma_device *mic_dma_dev_reg(struct mbus_device *mbdev,
- enum mic_dma_chan_owner owner)
-{
- struct mic_dma_device *mic_dma_dev;
- int ret;
- struct device *dev = &mbdev->dev;
-
- mic_dma_dev = devm_kzalloc(dev, sizeof(*mic_dma_dev), GFP_KERNEL);
- if (!mic_dma_dev) {
- ret = -ENOMEM;
- goto alloc_error;
- }
- mic_dma_dev->mbdev = mbdev;
- mic_dma_dev->dma_dev.dev = dev;
- mic_dma_dev->mmio = mbdev->mmio_va;
- if (MIC_DMA_CHAN_HOST == owner) {
- mic_dma_dev->start_ch = 0;
- mic_dma_dev->max_xfer_size = MIC_DMA_MAX_XFER_SIZE_HOST;
- } else {
- mic_dma_dev->start_ch = 4;
- mic_dma_dev->max_xfer_size = MIC_DMA_MAX_XFER_SIZE_CARD;
- }
- ret = mic_dma_init(mic_dma_dev, owner);
- if (ret)
- goto init_error;
- ret = mic_dma_register_dma_device(mic_dma_dev, owner);
- if (ret)
- goto reg_error;
- return mic_dma_dev;
-reg_error:
- mic_dma_uninit(mic_dma_dev);
-init_error:
- mic_dma_dev = NULL;
-alloc_error:
- dev_err(dev, "Error at %s %d ret=%d\n", __func__, __LINE__, ret);
- return mic_dma_dev;
-}
-
-static void mic_dma_dev_unreg(struct mic_dma_device *mic_dma_dev)
-{
- mic_dma_uninit(mic_dma_dev);
-}
-
-/* DEBUGFS CODE */
-static int mic_dma_reg_show(struct seq_file *s, void *pos)
-{
- struct mic_dma_device *mic_dma_dev = s->private;
- int i, chan_num, first_chan = mic_dma_dev->start_ch;
- struct mic_dma_chan *ch;
-
- seq_printf(s, "SBOX_DCR: %#x\n",
- mic_dma_mmio_read(&mic_dma_dev->mic_ch[first_chan],
- MIC_DMA_SBOX_BASE + MIC_DMA_SBOX_DCR));
- seq_puts(s, "DMA Channel Registers\n");
- seq_printf(s, "%-10s| %-10s %-10s %-10s %-10s %-10s",
- "Channel", "DCAR", "DTPR", "DHPR", "DRAR_HI", "DRAR_LO");
- seq_printf(s, " %-11s %-14s %-10s\n", "DCHERR", "DCHERRMSK", "DSTAT");
- for (i = first_chan; i < first_chan + MIC_DMA_NUM_CHAN; i++) {
- ch = &mic_dma_dev->mic_ch[i];
- chan_num = ch->ch_num;
- seq_printf(s, "%-10i| %-#10x %-#10x %-#10x %-#10x",
- chan_num,
- mic_dma_read_reg(ch, MIC_DMA_REG_DCAR),
- mic_dma_read_reg(ch, MIC_DMA_REG_DTPR),
- mic_dma_read_reg(ch, MIC_DMA_REG_DHPR),
- mic_dma_read_reg(ch, MIC_DMA_REG_DRAR_HI));
- seq_printf(s, " %-#10x %-#10x %-#14x %-#10x\n",
- mic_dma_read_reg(ch, MIC_DMA_REG_DRAR_LO),
- mic_dma_read_reg(ch, MIC_DMA_REG_DCHERR),
- mic_dma_read_reg(ch, MIC_DMA_REG_DCHERRMSK),
- mic_dma_read_reg(ch, MIC_DMA_REG_DSTAT));
- }
- return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(mic_dma_reg);
-
-/* Debugfs parent dir */
-static struct dentry *mic_dma_dbg;
-
-static int mic_dma_driver_probe(struct mbus_device *mbdev)
-{
- struct mic_dma_device *mic_dma_dev;
- enum mic_dma_chan_owner owner;
-
- if (MBUS_DEV_DMA_MIC == mbdev->id.device)
- owner = MIC_DMA_CHAN_MIC;
- else
- owner = MIC_DMA_CHAN_HOST;
-
- mic_dma_dev = mic_dma_dev_reg(mbdev, owner);
- dev_set_drvdata(&mbdev->dev, mic_dma_dev);
-
- if (mic_dma_dbg) {
- mic_dma_dev->dbg_dir = debugfs_create_dir(dev_name(&mbdev->dev),
- mic_dma_dbg);
- debugfs_create_file("mic_dma_reg", 0444, mic_dma_dev->dbg_dir,
- mic_dma_dev, &mic_dma_reg_fops);
- }
- return 0;
-}
-
-static void mic_dma_driver_remove(struct mbus_device *mbdev)
-{
- struct mic_dma_device *mic_dma_dev;
-
- mic_dma_dev = dev_get_drvdata(&mbdev->dev);
- debugfs_remove_recursive(mic_dma_dev->dbg_dir);
- mic_dma_dev_unreg(mic_dma_dev);
-}
-
-static struct mbus_device_id id_table[] = {
- {MBUS_DEV_DMA_MIC, MBUS_DEV_ANY_ID},
- {MBUS_DEV_DMA_HOST, MBUS_DEV_ANY_ID},
- {0},
-};
-
-static struct mbus_driver mic_dma_driver = {
- .driver.name = KBUILD_MODNAME,
- .driver.owner = THIS_MODULE,
- .id_table = id_table,
- .probe = mic_dma_driver_probe,
- .remove = mic_dma_driver_remove,
-};
-
-static int __init mic_x100_dma_init(void)
-{
- int rc = mbus_register_driver(&mic_dma_driver);
- if (rc)
- return rc;
- mic_dma_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
- return 0;
-}
-
-static void __exit mic_x100_dma_exit(void)
-{
- debugfs_remove_recursive(mic_dma_dbg);
- mbus_unregister_driver(&mic_dma_driver);
-}
-
-module_init(mic_x100_dma_init);
-module_exit(mic_x100_dma_exit);
-
-MODULE_DEVICE_TABLE(mbus, id_table);
-MODULE_AUTHOR("Intel Corporation");
-MODULE_DESCRIPTION("Intel(R) MIC X100 DMA Driver");
-MODULE_LICENSE("GPL v2");
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel MIC X100 DMA Driver.
- *
- * Adapted from IOAT dma driver.
- */
-#ifndef _MIC_X100_DMA_H_
-#define _MIC_X100_DMA_H_
-
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/sched.h>
-#include <linux/debugfs.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/mic_bus.h>
-
-#include "dmaengine.h"
-
-/*
- * MIC has a total of 8 dma channels.
- * Four channels are assigned for host SW use & the remaining for MIC SW.
- * MIC DMA transfer size & addresses need to be 64 byte aligned.
- */
-#define MIC_DMA_MAX_NUM_CHAN 8
-#define MIC_DMA_NUM_CHAN 4
-#define MIC_DMA_ALIGN_SHIFT DMAENGINE_ALIGN_64_BYTES
-#define MIC_DMA_ALIGN_BYTES (1 << MIC_DMA_ALIGN_SHIFT)
-#define MIC_DMA_DESC_RX_SIZE (128 * 1024 - 4)
-
-/*
- * Register descriptions
- * All the registers are 32 bit registers.
- * DCR is a global register and all others are per-channel.
- * DCR - bits 0, 2, 4, 6, 8, 10, 12, 14 - enable bits for channels 0 to 7
- * bits 1, 3, 5, 7, 9, 11, 13, 15 - owner bits for channels 0 to 7
- * DCAR - bit 24 & 25 interrupt masks for mic owned & host owned channels
- * DHPR - head of the descriptor ring updated by s/w
- * DTPR - tail of the descriptor ring updated by h/w
- * DRAR_LO - lower 32 bits of descriptor ring's mic address
- * DRAR_HI - 3:0 - remaining 4 bits of descriptor ring's mic address
- * 20:4 descriptor ring size
- * 25:21 mic smpt entry number
- * DSTAT - 16:0 h/w completion count; 31:28 dma engine status
- * DCHERR - this register is non-zero on error
- * DCHERRMSK - interrupt mask register
- */
-#define MIC_DMA_HW_CMP_CNT_MASK 0x1ffff
-#define MIC_DMA_CHAN_QUIESCE 0x20000000
-#define MIC_DMA_SBOX_BASE 0x00010000
-#define MIC_DMA_SBOX_DCR 0x0000A280
-#define MIC_DMA_SBOX_CH_BASE 0x0001A000
-#define MIC_DMA_SBOX_CHAN_OFF 0x40
-#define MIC_DMA_SBOX_DCAR_IM0 (0x1 << 24)
-#define MIC_DMA_SBOX_DCAR_IM1 (0x1 << 25)
-#define MIC_DMA_SBOX_DRARHI_SYS_MASK (0x1 << 26)
-#define MIC_DMA_REG_DCAR 0
-#define MIC_DMA_REG_DHPR 4
-#define MIC_DMA_REG_DTPR 8
-#define MIC_DMA_REG_DRAR_LO 20
-#define MIC_DMA_REG_DRAR_HI 24
-#define MIC_DMA_REG_DSTAT 32
-#define MIC_DMA_REG_DCHERR 44
-#define MIC_DMA_REG_DCHERRMSK 48
-
-/* HW dma desc */
-struct mic_dma_desc {
- u64 qw0;
- u64 qw1;
-};
-
-enum mic_dma_chan_owner {
- MIC_DMA_CHAN_MIC = 0,
- MIC_DMA_CHAN_HOST
-};
-
-/*
- * mic_dma_chan - channel specific information
- * @ch_num: channel number
- * @owner: owner of this channel
- * @last_tail: cached value of descriptor ring tail
- * @head: index of next descriptor in desc_ring
- * @issued: hardware notification point
- * @submitted: index that will be used to submit descriptors to h/w
- * @api_ch: dma engine api channel
- * @desc_ring: dma descriptor ring
- * @desc_ring_micpa: mic physical address of desc_ring
- * @status_dest: destination for status (fence) descriptor
- * @status_dest_micpa: mic address for status_dest,
- * DMA controller uses this address
- * @tx_array: array of async_tx
- * @cleanup_lock: lock held when processing completed tx
- * @prep_lock: lock held in prep_memcpy & released in tx_submit
- * @issue_lock: lock used to synchronize writes to head
- * @cookie: mic_irq cookie used with mic irq request
- */
-struct mic_dma_chan {
- int ch_num;
- enum mic_dma_chan_owner owner;
- u32 last_tail;
- u32 head;
- u32 issued;
- u32 submitted;
- struct dma_chan api_ch;
- struct mic_dma_desc *desc_ring;
- dma_addr_t desc_ring_micpa;
- u64 *status_dest;
- dma_addr_t status_dest_micpa;
- struct dma_async_tx_descriptor *tx_array;
- spinlock_t cleanup_lock;
- spinlock_t prep_lock;
- spinlock_t issue_lock;
- struct mic_irq *cookie;
-};
-
-/*
- * struct mic_dma_device - per mic device
- * @mic_ch: dma channels
- * @dma_dev: underlying dma device
- * @mbdev: mic bus dma device
- * @mmio: virtual address of the mmio space
- * @dbg_dir: debugfs directory
- * @start_ch: first channel number that can be used
- * @max_xfer_size: maximum transfer size per dma descriptor
- */
-struct mic_dma_device {
- struct mic_dma_chan mic_ch[MIC_DMA_MAX_NUM_CHAN];
- struct dma_device dma_dev;
- struct mbus_device *mbdev;
- void __iomem *mmio;
- struct dentry *dbg_dir;
- int start_ch;
- size_t max_xfer_size;
-};
-
-static inline struct mic_dma_chan *to_mic_dma_chan(struct dma_chan *ch)
-{
- return container_of(ch, struct mic_dma_chan, api_ch);
-}
-
-static inline struct mic_dma_device *to_mic_dma_dev(struct mic_dma_chan *ch)
-{
- return
- container_of((const typeof(((struct mic_dma_device *)0)->mic_ch)*)
- (ch - ch->ch_num), struct mic_dma_device, mic_ch);
-}
-
-static inline struct mbus_device *to_mbus_device(struct mic_dma_chan *ch)
-{
- return to_mic_dma_dev(ch)->mbdev;
-}
-
-static inline struct mbus_hw_ops *to_mbus_hw_ops(struct mic_dma_chan *ch)
-{
- return to_mbus_device(ch)->hw_ops;
-}
-
-static inline struct device *mic_dma_ch_to_device(struct mic_dma_chan *ch)
-{
- return to_mic_dma_dev(ch)->dma_dev.dev;
-}
-
-static inline void __iomem *mic_dma_chan_to_mmio(struct mic_dma_chan *ch)
-{
- return to_mic_dma_dev(ch)->mmio;
-}
-
-static inline u32 mic_dma_read_reg(struct mic_dma_chan *ch, u32 reg)
-{
- return ioread32(mic_dma_chan_to_mmio(ch) + MIC_DMA_SBOX_CH_BASE +
- ch->ch_num * MIC_DMA_SBOX_CHAN_OFF + reg);
-}
-
-static inline void mic_dma_write_reg(struct mic_dma_chan *ch, u32 reg, u32 val)
-{
- iowrite32(val, mic_dma_chan_to_mmio(ch) + MIC_DMA_SBOX_CH_BASE +
- ch->ch_num * MIC_DMA_SBOX_CHAN_OFF + reg);
-}
-
-static inline u32 mic_dma_mmio_read(struct mic_dma_chan *ch, u32 offset)
-{
- return ioread32(mic_dma_chan_to_mmio(ch) + offset);
-}
-
-static inline void mic_dma_mmio_write(struct mic_dma_chan *ch, u32 val,
- u32 offset)
-{
- iowrite32(val, mic_dma_chan_to_mmio(ch) + offset);
-}
-
-static inline u32 mic_dma_read_cmp_cnt(struct mic_dma_chan *ch)
-{
- return mic_dma_read_reg(ch, MIC_DMA_REG_DSTAT) &
- MIC_DMA_HW_CMP_CNT_MASK;
-}
-
-static inline void mic_dma_chan_set_owner(struct mic_dma_chan *ch)
-{
- u32 dcr = mic_dma_mmio_read(ch, MIC_DMA_SBOX_BASE + MIC_DMA_SBOX_DCR);
- u32 chan_num = ch->ch_num;
-
- dcr = (dcr & ~(0x1 << (chan_num * 2))) | (ch->owner << (chan_num * 2));
- mic_dma_mmio_write(ch, dcr, MIC_DMA_SBOX_BASE + MIC_DMA_SBOX_DCR);
-}
-
-static inline void mic_dma_enable_chan(struct mic_dma_chan *ch)
-{
- u32 dcr = mic_dma_mmio_read(ch, MIC_DMA_SBOX_BASE + MIC_DMA_SBOX_DCR);
-
- dcr |= 2 << (ch->ch_num << 1);
- mic_dma_mmio_write(ch, dcr, MIC_DMA_SBOX_BASE + MIC_DMA_SBOX_DCR);
-}
-
-static inline void mic_dma_disable_chan(struct mic_dma_chan *ch)
-{
- u32 dcr = mic_dma_mmio_read(ch, MIC_DMA_SBOX_BASE + MIC_DMA_SBOX_DCR);
-
- dcr &= ~(2 << (ch->ch_num << 1));
- mic_dma_mmio_write(ch, dcr, MIC_DMA_SBOX_BASE + MIC_DMA_SBOX_DCR);
-}
-
-static void mic_dma_chan_set_desc_ring(struct mic_dma_chan *ch)
-{
- u32 drar_hi;
- dma_addr_t desc_ring_micpa = ch->desc_ring_micpa;
-
- drar_hi = (MIC_DMA_DESC_RX_SIZE & 0x1ffff) << 4;
- if (MIC_DMA_CHAN_MIC == ch->owner) {
- drar_hi |= (desc_ring_micpa >> 32) & 0xf;
- } else {
- drar_hi |= MIC_DMA_SBOX_DRARHI_SYS_MASK;
- drar_hi |= ((desc_ring_micpa >> 34)
- & 0x1f) << 21;
- drar_hi |= (desc_ring_micpa >> 32) & 0x3;
- }
- mic_dma_write_reg(ch, MIC_DMA_REG_DRAR_LO, (u32) desc_ring_micpa);
- mic_dma_write_reg(ch, MIC_DMA_REG_DRAR_HI, drar_hi);
-}
-
-static inline void mic_dma_chan_mask_intr(struct mic_dma_chan *ch)
-{
- u32 dcar = mic_dma_read_reg(ch, MIC_DMA_REG_DCAR);
-
- if (MIC_DMA_CHAN_MIC == ch->owner)
- dcar |= MIC_DMA_SBOX_DCAR_IM0;
- else
- dcar |= MIC_DMA_SBOX_DCAR_IM1;
- mic_dma_write_reg(ch, MIC_DMA_REG_DCAR, dcar);
-}
-
-static inline void mic_dma_chan_unmask_intr(struct mic_dma_chan *ch)
-{
- u32 dcar = mic_dma_read_reg(ch, MIC_DMA_REG_DCAR);
-
- if (MIC_DMA_CHAN_MIC == ch->owner)
- dcar &= ~MIC_DMA_SBOX_DCAR_IM0;
- else
- dcar &= ~MIC_DMA_SBOX_DCAR_IM1;
- mic_dma_write_reg(ch, MIC_DMA_REG_DCAR, dcar);
-}
-
-static void mic_dma_ack_interrupt(struct mic_dma_chan *ch)
-{
- if (MIC_DMA_CHAN_MIC == ch->owner) {
- /* HW errata */
- mic_dma_chan_mask_intr(ch);
- mic_dma_chan_unmask_intr(ch);
- }
- to_mbus_hw_ops(ch)->ack_interrupt(to_mbus_device(ch), ch->ch_num);
-}
-#endif
protocols_imp[tot_num_ret + loop] = *(list + loop);
tot_num_ret += loop_num_ret;
+
+ scmi_reset_rx_to_maxsz(handle, t);
} while (loop_num_ret);
scmi_xfer_put(handle, t);
}
tot_rate_cnt += num_returned;
+
+ scmi_reset_rx_to_maxsz(handle, t);
/*
* check for both returned and remaining to avoid infinite
* loop due to buggy firmware
struct scmi_xfer *xfer);
int scmi_xfer_get_init(const struct scmi_handle *h, u8 msg_id, u8 prot_id,
size_t tx_size, size_t rx_size, struct scmi_xfer **p);
+void scmi_reset_rx_to_maxsz(const struct scmi_handle *handle,
+ struct scmi_xfer *xfer);
int scmi_handle_put(const struct scmi_handle *handle);
struct scmi_handle *scmi_handle_get(struct device *dev);
void scmi_set_handle(struct scmi_device *scmi_dev);
return ret;
}
+void scmi_reset_rx_to_maxsz(const struct scmi_handle *handle,
+ struct scmi_xfer *xfer)
+{
+ struct scmi_info *info = handle_to_scmi_info(handle);
+
+ xfer->rx.len = info->desc->max_msg_size;
+}
+
#define SCMI_MAX_RESPONSE_TIMEOUT (2 * MSEC_PER_SEC)
/**
"finalized PENDING handler - key:%X\n",
hndl->key);
ret = scmi_event_handler_enable_events(hndl);
+ if (ret) {
+ dev_dbg(ni->handle->dev,
+ "purging INVALID handler - key:%X\n",
+ hndl->key);
+ scmi_put_active_handler(ni, hndl);
+ }
} else {
ret = scmi_valid_pending_handler(ni, hndl);
- }
- if (ret) {
- dev_dbg(ni->handle->dev,
- "purging PENDING handler - key:%X\n",
- hndl->key);
- /* this hndl can be only a pending one */
- scmi_put_handler_unlocked(ni, hndl);
+ if (ret) {
+ dev_dbg(ni->handle->dev,
+ "purging PENDING handler - key:%X\n",
+ hndl->key);
+ /* this hndl can be only a pending one */
+ scmi_put_handler_unlocked(ni, hndl);
+ }
}
}
mutex_unlock(&ni->pending_mtx);
ni->gid = gid;
ni->handle = handle;
- ni->notify_wq = alloc_workqueue("scmi_notify",
+ ni->notify_wq = alloc_workqueue(dev_name(handle->dev),
WQ_UNBOUND | WQ_FREEZABLE | WQ_SYSFS,
0);
if (!ni->notify_wq)
}
tot_opp_cnt += num_returned;
+
+ scmi_reset_rx_to_maxsz(handle, t);
/*
* check for both returned and remaining to avoid infinite
* loop due to buggy firmware
#define EXPLICIT_RESET_ASSERT BIT(1)
#define ASYNCHRONOUS_RESET BIT(2)
__le32 reset_state;
-#define ARCH_RESET_TYPE BIT(31)
-#define COLD_RESET_STATE BIT(0)
-#define ARCH_COLD_RESET (ARCH_RESET_TYPE | COLD_RESET_STATE)
+#define ARCH_COLD_RESET 0
};
struct scmi_msg_reset_notify {
}
desc_index += num_returned;
+
+ scmi_reset_rx_to_maxsz(handle, t);
/*
* check for both returned and remaining to avoid infinite
* loop due to buggy firmware
const struct scmi_desc scmi_smc_desc = {
.ops = &scmi_smc_ops,
.max_rx_timeout_ms = 30,
- .max_msg = 1,
+ .max_msg = 20,
.max_msg_size = 128,
};
{0x1002, 0x7319, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_NAVI10},
{0x1002, 0x731A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_NAVI10},
{0x1002, 0x731B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_NAVI10},
+ {0x1002, 0x731E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_NAVI10},
{0x1002, 0x731F, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_NAVI10},
/* Navi14 */
{0x1002, 0x7340, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_NAVI14},
struct ww_acquire_ctx ticket;
struct list_head list, duplicates;
uint64_t va_flags;
+ uint64_t vm_size;
int r = 0;
if (args->va_address < AMDGPU_VA_RESERVED_SIZE) {
args->va_address &= AMDGPU_GMC_HOLE_MASK;
+ vm_size = adev->vm_manager.max_pfn * AMDGPU_GPU_PAGE_SIZE;
+ vm_size -= AMDGPU_VA_RESERVED_SIZE;
+ if (args->va_address + args->map_size > vm_size) {
+ dev_dbg(&dev->pdev->dev,
+ "va_address 0x%llx is in top reserved area 0x%llx\n",
+ args->va_address + args->map_size, vm_size);
+ return -EINVAL;
+ }
+
if ((args->flags & ~valid_flags) && (args->flags & ~prt_flags)) {
dev_dbg(&dev->pdev->dev, "invalid flags combination 0x%08X\n",
args->flags);
#define AMDGPU_MMHUB_0 1
#define AMDGPU_MMHUB_1 2
-/* hardcode that limit for now */
-#define AMDGPU_VA_RESERVED_SIZE (1ULL << 20)
+/* Reserve 2MB at top/bottom of address space for kernel use */
+#define AMDGPU_VA_RESERVED_SIZE (2ULL << 20)
/* max vmids dedicated for process */
#define AMDGPU_VM_MAX_RESERVED_VMID 1
adev->virt.ops = &xgpu_nv_virt_ops;
}
+static bool nv_is_blockchain_sku(struct pci_dev *pdev)
+{
+ if (pdev->device == 0x731E &&
+ (pdev->revision == 0xC6 || pdev->revision == 0xC7))
+ return true;
+ return false;
+}
+
int nv_set_ip_blocks(struct amdgpu_device *adev)
{
int r;
if (adev->enable_virtual_display || amdgpu_sriov_vf(adev))
amdgpu_device_ip_block_add(adev, &dce_virtual_ip_block);
#if defined(CONFIG_DRM_AMD_DC)
- else if (amdgpu_device_has_dc_support(adev))
+ else if (amdgpu_device_has_dc_support(adev) &&
+ !nv_is_blockchain_sku(adev->pdev))
amdgpu_device_ip_block_add(adev, &dm_ip_block);
#endif
amdgpu_device_ip_block_add(adev, &gfx_v10_0_ip_block);
if (adev->firmware.load_type == AMDGPU_FW_LOAD_DIRECT &&
!amdgpu_sriov_vf(adev))
amdgpu_device_ip_block_add(adev, &smu_v11_0_ip_block);
- amdgpu_device_ip_block_add(adev, &vcn_v2_0_ip_block);
+ if (!nv_is_blockchain_sku(adev->pdev))
+ amdgpu_device_ip_block_add(adev, &vcn_v2_0_ip_block);
amdgpu_device_ip_block_add(adev, &jpeg_v2_0_ip_block);
if (adev->enable_mes)
amdgpu_device_ip_block_add(adev, &mes_v10_1_ip_block);
config DEBUG_KERNEL_DC
bool "Enable kgdb break in DC"
depends on DRM_AMD_DC
+ depends on KGDB
help
Choose this option if you want to hit kdgb_break in assert.
struct dc_state *dc_create_state(struct dc *dc)
{
- struct dc_state *context = kzalloc(sizeof(struct dc_state),
- GFP_KERNEL);
+ struct dc_state *context = kvzalloc(sizeof(struct dc_state),
+ GFP_KERNEL);
if (!context)
return NULL;
static const struct clock_source_funcs dcn3_clk_src_funcs = {
.cs_power_down = dce110_clock_source_power_down,
.program_pix_clk = dcn3_program_pix_clk,
- .get_pix_clk_dividers = dcn3_get_pix_clk_dividers
+ .get_pix_clk_dividers = dcn3_get_pix_clk_dividers,
+ .get_pixel_clk_frequency_100hz = get_pixel_clk_frequency_100hz
};
#endif
/*****************************************/
if (split[i]) {
if (odm) {
- if (split[i] == 4 && old_pipe->next_odm_pipe->next_odm_pipe)
+ if (split[i] == 4 && old_pipe->next_odm_pipe && old_pipe->next_odm_pipe->next_odm_pipe)
old_index = old_pipe->next_odm_pipe->next_odm_pipe->pipe_idx;
else if (old_pipe->next_odm_pipe)
old_index = old_pipe->next_odm_pipe->pipe_idx;
} else {
- if (split[i] == 4 && old_pipe->bottom_pipe->bottom_pipe &&
+ if (split[i] == 4 && old_pipe->bottom_pipe && old_pipe->bottom_pipe->bottom_pipe &&
old_pipe->bottom_pipe->bottom_pipe->plane_state == old_pipe->plane_state)
old_index = old_pipe->bottom_pipe->bottom_pipe->pipe_idx;
else if (old_pipe->bottom_pipe &&
goto validate_fail;
newly_split[pipe_4to1->pipe_idx] = true;
- if (odm && old_pipe->next_odm_pipe->next_odm_pipe->next_odm_pipe)
+ if (odm && old_pipe->next_odm_pipe && old_pipe->next_odm_pipe->next_odm_pipe
+ && old_pipe->next_odm_pipe->next_odm_pipe->next_odm_pipe)
old_index = old_pipe->next_odm_pipe->next_odm_pipe->next_odm_pipe->pipe_idx;
- else if (!odm && old_pipe->bottom_pipe->bottom_pipe->bottom_pipe &&
- old_pipe->bottom_pipe->bottom_pipe->bottom_pipe->plane_state == old_pipe->plane_state)
+ else if (!odm && old_pipe->bottom_pipe && old_pipe->bottom_pipe->bottom_pipe &&
+ old_pipe->bottom_pipe->bottom_pipe->bottom_pipe &&
+ old_pipe->bottom_pipe->bottom_pipe->bottom_pipe->plane_state == old_pipe->plane_state)
old_index = old_pipe->bottom_pipe->bottom_pipe->bottom_pipe->pipe_idx;
else
old_index = -1;
ddc_data_regs_dcn2(4),
ddc_data_regs_dcn2(5),
ddc_data_regs_dcn2(6),
+ {
+ DDC_GPIO_VGA_REG_LIST(DATA),
+ .ddc_setup = 0,
+ .phy_aux_cntl = 0,
+ .dc_gpio_aux_ctrl_5 = 0
+ }
};
static const struct ddc_registers ddc_clk_regs_dcn[] = {
ddc_clk_regs_dcn2(4),
ddc_clk_regs_dcn2(5),
ddc_clk_regs_dcn2(6),
+ {
+ DDC_GPIO_VGA_REG_LIST(CLK),
+ .ddc_setup = 0,
+ .phy_aux_cntl = 0,
+ .dc_gpio_aux_ctrl_5 = 0
+ }
};
static const struct ddc_sh_mask ddc_shift[] = {
enum gpio_mode mode)
{
if (gpio->pin) {
- ASSERT_CRITICAL(false);
+ BREAK_TO_DEBUGGER();
return GPIO_RESULT_ALREADY_OPENED;
}
// No action if allocation failed during gpio construct
if (!gpio->hw_container.ddc) {
- ASSERT_CRITICAL(false);
+ BREAK_TO_DEBUGGER();
return GPIO_RESULT_NON_SPECIFIC_ERROR;
}
gpio->mode = mode;
* general debug capabilities
*
*/
-#if defined(CONFIG_HAVE_KGDB) || defined(CONFIG_KGDB)
-#define ASSERT_CRITICAL(expr) do { \
- if (WARN_ON(!(expr))) { \
- kgdb_breakpoint(); \
- } \
-} while (0)
+#ifdef CONFIG_DEBUG_KERNEL_DC
+#define dc_breakpoint() kgdb_breakpoint()
#else
-#define ASSERT_CRITICAL(expr) do { \
- if (WARN_ON(!(expr))) { \
- ; \
- } \
-} while (0)
+#define dc_breakpoint() do {} while (0)
#endif
-#if defined(CONFIG_DEBUG_KERNEL_DC)
-#define ASSERT(expr) ASSERT_CRITICAL(expr)
+#define ASSERT_CRITICAL(expr) do { \
+ if (WARN_ON(!(expr))) \
+ dc_breakpoint(); \
+ } while (0)
-#else
-#define ASSERT(expr) WARN_ON_ONCE(!(expr))
-#endif
+#define ASSERT(expr) do { \
+ if (WARN_ON_ONCE(!(expr))) \
+ dc_breakpoint(); \
+ } while (0)
-#if defined(CONFIG_DEBUG_KERNEL_DC) && (defined(CONFIG_HAVE_KGDB) || defined(CONFIG_KGDB))
#define BREAK_TO_DEBUGGER() \
do { \
DRM_DEBUG_DRIVER("%s():%d\n", __func__, __LINE__); \
- kgdb_breakpoint(); \
+ dc_breakpoint(); \
} while (0)
-#else
-#define BREAK_TO_DEBUGGER() DRM_DEBUG_DRIVER("%s():%d\n", __func__, __LINE__)
-#endif
#define DC_ERR(...) do { \
dm_error(__VA_ARGS__); \
if (!speed)
return -EINVAL;
- switch (smu_v11_0_get_fan_control_mode(smu)) {
- case AMD_FAN_CTRL_AUTO:
- return navi10_get_smu_metrics_data(smu,
- METRICS_CURR_FANSPEED,
- speed);
- default:
- return smu_v11_0_get_fan_speed_rpm(smu, speed);
- }
+ return navi10_get_smu_metrics_data(smu,
+ METRICS_CURR_FANSPEED,
+ speed);
}
static int navi10_get_fan_parameters(struct smu_context *smu)
.functionality = navi10_i2c_func,
};
-static int navi10_i2c_control_init(struct smu_context *smu, struct i2c_adapter *control)
-{
- struct amdgpu_device *adev = to_amdgpu_device(control);
- int res;
-
- control->owner = THIS_MODULE;
- control->class = I2C_CLASS_SPD;
- control->dev.parent = &adev->pdev->dev;
- control->algo = &navi10_i2c_algo;
- snprintf(control->name, sizeof(control->name), "AMDGPU SMU");
-
- res = i2c_add_adapter(control);
- if (res)
- DRM_ERROR("Failed to register hw i2c, err: %d\n", res);
-
- return res;
-}
-
-static void navi10_i2c_control_fini(struct smu_context *smu, struct i2c_adapter *control)
-{
- i2c_del_adapter(control);
-}
-
static ssize_t navi10_get_gpu_metrics(struct smu_context *smu,
void **table)
{
.set_default_dpm_table = navi10_set_default_dpm_table,
.dpm_set_vcn_enable = navi10_dpm_set_vcn_enable,
.dpm_set_jpeg_enable = navi10_dpm_set_jpeg_enable,
- .i2c_init = navi10_i2c_control_init,
- .i2c_fini = navi10_i2c_control_fini,
.print_clk_levels = navi10_print_clk_levels,
.force_clk_levels = navi10_force_clk_levels,
.populate_umd_state_clk = navi10_populate_umd_state_clk,
if (!speed)
return -EINVAL;
- switch (smu_v11_0_get_fan_control_mode(smu)) {
- case AMD_FAN_CTRL_AUTO:
- return sienna_cichlid_get_smu_metrics_data(smu,
- METRICS_CURR_FANSPEED,
- speed);
- default:
- return smu_v11_0_get_fan_speed_rpm(smu, speed);
- }
+ return sienna_cichlid_get_smu_metrics_data(smu,
+ METRICS_CURR_FANSPEED,
+ speed);
}
static int sienna_cichlid_get_fan_parameters(struct smu_context *smu)
* drm_dp_downstream_is_type() - is the downstream facing port of certain type?
* @dpcd: DisplayPort configuration data
* @port_cap: port capabilities
+ * @type: port type to be checked. Can be:
+ * %DP_DS_PORT_TYPE_DP, %DP_DS_PORT_TYPE_VGA, %DP_DS_PORT_TYPE_DVI,
+ * %DP_DS_PORT_TYPE_HDMI, %DP_DS_PORT_TYPE_NON_EDID,
+ * %DP_DS_PORT_TYPE_DP_DUALMODE or %DP_DS_PORT_TYPE_WIRELESS.
*
* Caveat: Only works with DPCD 1.1+ port caps.
*
/**
* drm_dp_downstream_mode() - return a mode for downstream facing port
+ * @dev: DRM device
* @dpcd: DisplayPort configuration data
* @port_cap: port capabilities
*
/**
* drm_dp_subconnector_type() - get DP branch device type
- *
+ * @dpcd: DisplayPort configuration data
+ * @port_cap: port capabilities
*/
enum drm_mode_subconnector
drm_dp_subconnector_type(const u8 dpcd[DP_RECEIVER_CAP_SIZE],
/**
* drm_mode_set_dp_subconnector_property - set subconnector for DP connector
+ * @connector: connector to set property on
+ * @status: connector status
+ * @dpcd: DisplayPort configuration data
+ * @port_cap: port capabilities
*
* Called by a driver on every detect event.
*/
/**
* drm_display_mode_from_cea_vic() - return a mode for CEA VIC
* @dev: DRM device
- * @vic: CEA VIC of the mode
+ * @video_code: CEA VIC of the mode
*
* Creates a new mode matching the specified CEA VIC.
*
*/
drm_gem_object_get(obj);
+ vma->vm_private_data = obj;
+
if (obj->funcs && obj->funcs->mmap) {
ret = obj->funcs->mmap(obj, vma);
if (ret) {
vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
}
- vma->vm_private_data = obj;
-
return 0;
}
EXPORT_SYMBOL(drm_gem_mmap_obj);
/* Remove the fake offset */
vma->vm_pgoff -= drm_vma_node_start(&obj->vma_node);
- if (obj->import_attach)
+ if (obj->import_attach) {
+ /* Drop the reference drm_gem_mmap_obj() acquired.*/
+ drm_gem_object_put(obj);
+ vma->vm_private_data = NULL;
+
return dma_buf_mmap(obj->dma_buf, vma, 0);
+ }
shmem = to_drm_gem_shmem_obj(obj);
/**
* drm_prime_pages_to_sg - converts a page array into an sg list
+ * @dev: DRM device
* @pages: pointer to the array of page pointers to convert
* @nr_pages: length of the page vector
*
val & PLANE_CTL_FLIP_HORIZONTAL)
plane_config->rotation |= DRM_MODE_REFLECT_X;
+ /* 90/270 degree rotation would require extra work */
+ if (drm_rotation_90_or_270(plane_config->rotation))
+ goto error;
+
base = intel_de_read(dev_priv, PLANE_SURF(pipe, plane_id)) & 0xfffff000;
plane_config->base = base;
GEN5_FEATURES,
PLATFORM(INTEL_IRONLAKE),
.is_mobile = 1,
+ .has_rps = true,
.display.has_fbc = 1,
};
min_order = ilog2(size) - ilog2(mem->mm.chunk_size);
}
- if (size > BIT(mem->mm.max_order) * mem->mm.chunk_size)
+ if (size > mem->mm.size)
return -E2BIG;
n_pages = size >> ilog2(mem->mm.chunk_size);
return err;
}
+static int igt_mock_splintered_region(void *arg)
+{
+ struct intel_memory_region *mem = arg;
+ struct drm_i915_private *i915 = mem->i915;
+ struct drm_i915_gem_object *obj;
+ unsigned int expected_order;
+ LIST_HEAD(objects);
+ u64 size;
+ int err = 0;
+
+ /*
+ * Sanity check we can still allocate everything even if the
+ * mm.max_order != mm.size. i.e our starting address space size is not a
+ * power-of-two.
+ */
+
+ size = (SZ_4G - 1) & PAGE_MASK;
+ mem = mock_region_create(i915, 0, size, PAGE_SIZE, 0);
+ if (IS_ERR(mem))
+ return PTR_ERR(mem);
+
+ if (mem->mm.size != size) {
+ pr_err("%s size mismatch(%llu != %llu)\n",
+ __func__, mem->mm.size, size);
+ err = -EINVAL;
+ goto out_put;
+ }
+
+ expected_order = get_order(rounddown_pow_of_two(size));
+ if (mem->mm.max_order != expected_order) {
+ pr_err("%s order mismatch(%u != %u)\n",
+ __func__, mem->mm.max_order, expected_order);
+ err = -EINVAL;
+ goto out_put;
+ }
+
+ obj = igt_object_create(mem, &objects, size, 0);
+ if (IS_ERR(obj)) {
+ err = PTR_ERR(obj);
+ goto out_close;
+ }
+
+ close_objects(mem, &objects);
+
+ /*
+ * While we should be able allocate everything without any flag
+ * restrictions, if we consider I915_BO_ALLOC_CONTIGUOUS then we are
+ * actually limited to the largest power-of-two for the region size i.e
+ * max_order, due to the inner workings of the buddy allocator. So make
+ * sure that does indeed hold true.
+ */
+
+ obj = igt_object_create(mem, &objects, size, I915_BO_ALLOC_CONTIGUOUS);
+ if (!IS_ERR(obj)) {
+ pr_err("%s too large contiguous allocation was not rejected\n",
+ __func__);
+ err = -EINVAL;
+ goto out_close;
+ }
+
+ obj = igt_object_create(mem, &objects, rounddown_pow_of_two(size),
+ I915_BO_ALLOC_CONTIGUOUS);
+ if (IS_ERR(obj)) {
+ pr_err("%s largest possible contiguous allocation failed\n",
+ __func__);
+ err = PTR_ERR(obj);
+ goto out_close;
+ }
+
+out_close:
+ close_objects(mem, &objects);
+out_put:
+ intel_memory_region_put(mem);
+ return err;
+}
+
static int igt_gpu_write_dw(struct intel_context *ce,
struct i915_vma *vma,
u32 dword,
static const struct i915_subtest tests[] = {
SUBTEST(igt_mock_fill),
SUBTEST(igt_mock_contiguous),
+ SUBTEST(igt_mock_splintered_region),
};
struct intel_memory_region *mem;
struct drm_i915_private *i915;
struct drm_i915_private *i915 = mem->i915;
struct drm_i915_gem_object *obj;
- if (size > BIT(mem->mm.max_order) * mem->mm.chunk_size)
+ if (size > mem->mm.size)
return ERR_PTR(-E2BIG);
obj = i915_gem_object_alloc();
struct nv50_core **);
int core507d_init(struct nv50_core *);
void core507d_ntfy_init(struct nouveau_bo *, u32);
+int core507d_read_caps(struct nv50_disp *disp);
int core507d_caps_init(struct nouveau_drm *, struct nv50_disp *);
int core507d_ntfy_wait_done(struct nouveau_bo *, u32, struct nvif_device *);
int core507d_update(struct nv50_core *, u32 *, bool);
int core827d_new(struct nouveau_drm *, s32, struct nv50_core **);
int core907d_new(struct nouveau_drm *, s32, struct nv50_core **);
+int core907d_caps_init(struct nouveau_drm *drm, struct nv50_disp *disp);
extern const struct nv50_outp_func dac907d;
extern const struct nv50_outp_func sor907d;
}
int
-core507d_caps_init(struct nouveau_drm *drm, struct nv50_disp *disp)
+core507d_read_caps(struct nv50_disp *disp)
{
struct nvif_push *push = disp->core->chan.push;
int ret;
- if ((ret = PUSH_WAIT(push, 2)))
+ ret = PUSH_WAIT(push, 6);
+ if (ret)
return ret;
+ PUSH_MTHD(push, NV507D, SET_NOTIFIER_CONTROL,
+ NVDEF(NV507D, SET_NOTIFIER_CONTROL, MODE, WRITE) |
+ NVVAL(NV507D, SET_NOTIFIER_CONTROL, OFFSET, NV50_DISP_CORE_NTFY >> 2) |
+ NVDEF(NV507D, SET_NOTIFIER_CONTROL, NOTIFY, ENABLE));
+
PUSH_MTHD(push, NV507D, GET_CAPABILITIES, 0x00000000);
+
+ PUSH_MTHD(push, NV507D, SET_NOTIFIER_CONTROL,
+ NVDEF(NV507D, SET_NOTIFIER_CONTROL, NOTIFY, DISABLE));
+
return PUSH_KICK(push);
}
+int
+core507d_caps_init(struct nouveau_drm *drm, struct nv50_disp *disp)
+{
+ struct nv50_core *core = disp->core;
+ struct nouveau_bo *bo = disp->sync;
+ s64 time;
+ int ret;
+
+ NVBO_WR32(bo, NV50_DISP_CORE_NTFY, NV_DISP_CORE_NOTIFIER_1, CAPABILITIES_1,
+ NVDEF(NV_DISP_CORE_NOTIFIER_1, CAPABILITIES_1, DONE, FALSE));
+
+ ret = core507d_read_caps(disp);
+ if (ret < 0)
+ return ret;
+
+ time = nvif_msec(core->chan.base.device, 2000ULL,
+ if (NVBO_TD32(bo, NV50_DISP_CORE_NTFY,
+ NV_DISP_CORE_NOTIFIER_1, CAPABILITIES_1, DONE, ==, TRUE))
+ break;
+ usleep_range(1, 2);
+ );
+ if (time < 0)
+ NV_ERROR(drm, "core caps notifier timeout\n");
+
+ return 0;
+}
+
int
core507d_init(struct nv50_core *core)
{
#include "core.h"
#include "head.h"
+#include <nvif/push507c.h>
+#include <nvif/timer.h>
+
+#include <nvhw/class/cl907d.h>
+
+#include "nouveau_bo.h"
+
+int
+core907d_caps_init(struct nouveau_drm *drm, struct nv50_disp *disp)
+{
+ struct nv50_core *core = disp->core;
+ struct nouveau_bo *bo = disp->sync;
+ s64 time;
+ int ret;
+
+ NVBO_WR32(bo, NV50_DISP_CORE_NTFY, NV907D_CORE_NOTIFIER_3, CAPABILITIES_4,
+ NVDEF(NV907D_CORE_NOTIFIER_3, CAPABILITIES_4, DONE, FALSE));
+
+ ret = core507d_read_caps(disp);
+ if (ret < 0)
+ return ret;
+
+ time = nvif_msec(core->chan.base.device, 2000ULL,
+ if (NVBO_TD32(bo, NV50_DISP_CORE_NTFY,
+ NV907D_CORE_NOTIFIER_3, CAPABILITIES_4, DONE, ==, TRUE))
+ break;
+ usleep_range(1, 2);
+ );
+ if (time < 0)
+ NV_ERROR(drm, "core caps notifier timeout\n");
+
+ return 0;
+}
+
static const struct nv50_core_func
core907d = {
.init = core507d_init,
.ntfy_init = core507d_ntfy_init,
- .caps_init = core507d_caps_init,
+ .caps_init = core907d_caps_init,
.ntfy_wait_done = core507d_ntfy_wait_done,
.update = core507d_update,
.head = &head907d,
core917d = {
.init = core507d_init,
.ntfy_init = core507d_ntfy_init,
- .caps_init = core507d_caps_init,
+ .caps_init = core907d_caps_init,
.ntfy_wait_done = core507d_ntfy_wait_done,
.update = core507d_update,
.head = &head917d,
#define NV_DISP_CORE_NOTIFIER_1_COMPLETION_0_DONE_TRUE 0x00000001
#define NV_DISP_CORE_NOTIFIER_1_COMPLETION_0_R0 15:1
#define NV_DISP_CORE_NOTIFIER_1_COMPLETION_0_TIMESTAMP 29:16
-
+#define NV_DISP_CORE_NOTIFIER_1_CAPABILITIES_1 0x00000001
+#define NV_DISP_CORE_NOTIFIER_1_CAPABILITIES_1_DONE 0:0
+#define NV_DISP_CORE_NOTIFIER_1_CAPABILITIES_1_DONE_FALSE 0x00000000
+#define NV_DISP_CORE_NOTIFIER_1_CAPABILITIES_1_DONE_TRUE 0x00000001
// class methods
#define NV507D_UPDATE (0x00000080)
#ifndef _cl907d_h_
#define _cl907d_h_
+#define NV907D_CORE_NOTIFIER_3_CAPABILITIES_4 0x00000004
+#define NV907D_CORE_NOTIFIER_3_CAPABILITIES_4_DONE 0:0
+#define NV907D_CORE_NOTIFIER_3_CAPABILITIES_4_DONE_FALSE 0x00000000
+#define NV907D_CORE_NOTIFIER_3_CAPABILITIES_4_DONE_TRUE 0x00000001
#define NV907D_CORE_NOTIFIER_3_CAPABILITIES_CAP_SOR0_20 0x00000014
#define NV907D_CORE_NOTIFIER_3_CAPABILITIES_CAP_SOR0_20_SINGLE_LVDS18 0:0
#define NV907D_CORE_NOTIFIER_3_CAPABILITIES_CAP_SOR0_20_SINGLE_LVDS18_FALSE 0x00000000
return 112000 * duallink_scale;
}
-enum drm_mode_status
-nouveau_conn_mode_clock_valid(const struct drm_display_mode *mode,
- const unsigned min_clock,
- const unsigned max_clock,
- unsigned int *clock_out)
-{
- unsigned int clock = mode->clock;
-
- if ((mode->flags & DRM_MODE_FLAG_3D_MASK) ==
- DRM_MODE_FLAG_3D_FRAME_PACKING)
- clock *= 2;
-
- if (clock < min_clock)
- return MODE_CLOCK_LOW;
- if (clock > max_clock)
- return MODE_CLOCK_HIGH;
-
- if (clock_out)
- *clock_out = clock;
-
- return MODE_OK;
-}
-
static enum drm_mode_status
nouveau_connector_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
struct nouveau_connector *nv_connector = nouveau_connector(connector);
struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
- unsigned min_clock = 25000, max_clock = min_clock;
+ unsigned int min_clock = 25000, max_clock = min_clock, clock = mode->clock;
switch (nv_encoder->dcb->type) {
case DCB_OUTPUT_LVDS:
return MODE_BAD;
}
- return nouveau_conn_mode_clock_valid(mode, min_clock, max_clock,
- NULL);
+ if ((mode->flags & DRM_MODE_FLAG_3D_MASK) == DRM_MODE_FLAG_3D_FRAME_PACKING)
+ clock *= 2;
+
+ if (clock < min_clock)
+ return MODE_CLOCK_LOW;
+ if (clock > max_clock)
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
}
static struct drm_encoder *
const struct drm_display_mode *mode,
unsigned *out_clock)
{
- const unsigned min_clock = 25000;
- unsigned max_clock, ds_clock, clock;
- enum drm_mode_status ret;
+ const unsigned int min_clock = 25000;
+ unsigned int max_rate, mode_rate, ds_max_dotclock, clock = mode->clock;
+ const u8 bpp = connector->display_info.bpc * 3;
if (mode->flags & DRM_MODE_FLAG_INTERLACE && !outp->caps.dp_interlace)
return MODE_NO_INTERLACE;
- max_clock = outp->dp.link_nr * outp->dp.link_bw;
- ds_clock = drm_dp_downstream_max_dotclock(outp->dp.dpcd,
- outp->dp.downstream_ports);
- if (ds_clock)
- max_clock = min(max_clock, ds_clock);
+ if ((mode->flags & DRM_MODE_FLAG_3D_MASK) == DRM_MODE_FLAG_3D_FRAME_PACKING)
+ clock *= 2;
+
+ max_rate = outp->dp.link_nr * outp->dp.link_bw;
+ mode_rate = DIV_ROUND_UP(clock * bpp, 8);
+ if (mode_rate > max_rate)
+ return MODE_CLOCK_HIGH;
+
+ ds_max_dotclock = drm_dp_downstream_max_dotclock(outp->dp.dpcd, outp->dp.downstream_ports);
+ if (ds_max_dotclock && clock > ds_max_dotclock)
+ return MODE_CLOCK_HIGH;
+
+ if (clock < min_clock)
+ return MODE_CLOCK_LOW;
- clock = mode->clock * (connector->display_info.bpc * 3) / 10;
- ret = nouveau_conn_mode_clock_valid(mode, min_clock, max_clock,
- &clock);
if (out_clock)
*out_clock = clock;
- return ret;
+
+ return MODE_OK;
}
* to the caller, instead of a normal nouveau_bo ttm reference. */
ret = drm_gem_object_init(drm->dev, &nvbo->bo.base, size);
if (ret) {
- nouveau_bo_ref(NULL, &nvbo);
+ drm_gem_object_release(&nvbo->bo.base);
+ kfree(nvbo);
return ret;
}
struct nouveau_cli *cli = nouveau_cli(file_priv);
struct drm_nouveau_svm_bind *args = data;
unsigned target, cmd, priority;
- unsigned long addr, end, size;
+ unsigned long addr, end;
struct mm_struct *mm;
args->va_start &= PAGE_MASK;
- args->va_end &= PAGE_MASK;
+ args->va_end = ALIGN(args->va_end, PAGE_SIZE);
/* Sanity check arguments */
if (args->reserved0 || args->reserved1)
return -EINVAL;
if (args->va_start >= args->va_end)
return -EINVAL;
- if (!args->npages)
- return -EINVAL;
cmd = args->header >> NOUVEAU_SVM_BIND_COMMAND_SHIFT;
cmd &= NOUVEAU_SVM_BIND_COMMAND_MASK;
if (args->stride)
return -EINVAL;
- size = ((unsigned long)args->npages) << PAGE_SHIFT;
- if ((args->va_start + size) <= args->va_start)
- return -EINVAL;
- if ((args->va_start + size) > args->va_end)
- return -EINVAL;
-
/*
* Ok we are ask to do something sane, for now we only support migrate
* commands but we will add things like memory policy (what to do on
return -EINVAL;
}
- for (addr = args->va_start, end = args->va_start + size; addr < end;) {
+ for (addr = args->va_start, end = args->va_end; addr < end;) {
struct vm_area_struct *vma;
unsigned long next;
}
}
+/* returns true if the GPU is in the CPU native byte order */
static inline bool
nvkm_device_endianness(struct nvkm_device *device)
{
- u32 boot1 = nvkm_rd32(device, 0x000004) & 0x01000001;
#ifdef __BIG_ENDIAN
- if (!boot1)
- return false;
+ const bool big_endian = true;
#else
- if (boot1)
- return false;
+ const bool big_endian = false;
#endif
+
+ /* Read NV_PMC_BOOT_1, and assume non-functional endian switch if it
+ * doesn't contain the expected values.
+ */
+ u32 pmc_boot_1 = nvkm_rd32(device, 0x000004);
+ if (pmc_boot_1 && pmc_boot_1 != 0x01000001)
+ return !big_endian; /* Assume GPU is LE in this case. */
+
+ /* 0 means LE and 0x01000001 means BE GPU. Condition is true when
+ * GPU/CPU endianness don't match.
+ */
+ if (big_endian == !pmc_boot_1) {
+ nvkm_wr32(device, 0x000004, 0x01000001);
+ nvkm_rd32(device, 0x000000);
+ if (nvkm_rd32(device, 0x000004) != (big_endian ? 0x01000001 : 0x00000000))
+ return !big_endian; /* Assume GPU is LE on any unexpected read-back. */
+ }
+
+ /* CPU/GPU endianness should (hopefully) match. */
return true;
}
if (detect) {
/* switch mmio to cpu's native endianness */
if (!nvkm_device_endianness(device)) {
- nvkm_wr32(device, 0x000004, 0x01000001);
- nvkm_rd32(device, 0x000000);
- if (!nvkm_device_endianness(device)) {
- nvdev_error(device,
- "GPU not supported on big-endian\n");
- ret = -ENOSYS;
- goto done;
- }
+ nvdev_error(device,
+ "Couldn't switch GPU to CPUs endianess\n");
+ ret = -ENOSYS;
+ goto done;
}
boot0 = nvkm_rd32(device, 0x000000);
struct mantix {
struct device *dev;
struct drm_panel panel;
+
struct gpio_desc *reset_gpio;
+ struct gpio_desc *tp_rstn_gpio;
struct regulator *avdd;
struct regulator *avee;
{
struct mantix *ctx = panel_to_mantix(panel);
+ gpiod_set_value_cansleep(ctx->tp_rstn_gpio, 1);
+ usleep_range(5000, 6000);
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+
regulator_disable(ctx->avee);
regulator_disable(ctx->avdd);
/* T11 */
return ret;
}
- /* T3+T5 */
- usleep_range(10000, 12000);
-
- gpiod_set_value_cansleep(ctx->reset_gpio, 1);
- usleep_range(5150, 7000);
-
+ /* T3 + T4 + time for voltage to become stable: */
+ usleep_range(6000, 7000);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+ gpiod_set_value_cansleep(ctx->tp_rstn_gpio, 0);
/* T6 */
msleep(50);
if (!mode) {
dev_err(ctx->dev, "Failed to add mode %ux%u@%u\n",
default_mode.hdisplay, default_mode.vdisplay,
- drm_mode_vrefresh(mode));
+ drm_mode_vrefresh(&default_mode));
return -ENOMEM;
}
if (!ctx)
return -ENOMEM;
- ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+ ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(ctx->reset_gpio)) {
dev_err(dev, "cannot get reset gpio\n");
return PTR_ERR(ctx->reset_gpio);
}
+ ctx->tp_rstn_gpio = devm_gpiod_get(dev, "mantix,tp-rstn", GPIOD_OUT_HIGH);
+ if (IS_ERR(ctx->tp_rstn_gpio)) {
+ dev_err(dev, "cannot get tp-rstn gpio\n");
+ return PTR_ERR(ctx->tp_rstn_gpio);
+ }
+
mipi_dsi_set_drvdata(dsi, ctx);
ctx->dev = dev;
struct drm_framebuffer *fb = state->fb;
const struct drm_format_info *format = fb->format;
uint64_t modifier = fb->modifier;
+ unsigned int ch1_phase_idx;
u32 out_fmt_val;
u32 in_fmt_val, in_mod_val, in_ps_val;
unsigned int i;
* I have no idea what this does exactly, but it seems to be
* related to the scaler FIR filter phase parameters.
*/
+ ch1_phase_idx = (format->num_planes > 1) ? 1 : 0;
regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_HORZPHASE_REG,
- frontend->data->ch_phase[0].horzphase);
+ frontend->data->ch_phase[0]);
regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_HORZPHASE_REG,
- frontend->data->ch_phase[1].horzphase);
+ frontend->data->ch_phase[ch1_phase_idx]);
regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_VERTPHASE0_REG,
- frontend->data->ch_phase[0].vertphase[0]);
+ frontend->data->ch_phase[0]);
regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_VERTPHASE0_REG,
- frontend->data->ch_phase[1].vertphase[0]);
+ frontend->data->ch_phase[ch1_phase_idx]);
regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_VERTPHASE1_REG,
- frontend->data->ch_phase[0].vertphase[1]);
+ frontend->data->ch_phase[0]);
regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_VERTPHASE1_REG,
- frontend->data->ch_phase[1].vertphase[1]);
+ frontend->data->ch_phase[ch1_phase_idx]);
/*
* Checking the input format is sufficient since we currently only
};
static const struct sun4i_frontend_data sun4i_a10_frontend = {
- .ch_phase = {
- {
- .horzphase = 0,
- .vertphase = { 0, 0 },
- },
- {
- .horzphase = 0xfc000,
- .vertphase = { 0xfc000, 0xfc000 },
- },
- },
+ .ch_phase = { 0x000, 0xfc000 },
.has_coef_rdy = true,
};
static const struct sun4i_frontend_data sun8i_a33_frontend = {
- .ch_phase = {
- {
- .horzphase = 0x400,
- .vertphase = { 0x400, 0x400 },
- },
- {
- .horzphase = 0x400,
- .vertphase = { 0x400, 0x400 },
- },
- },
+ .ch_phase = { 0x400, 0xfc400 },
.has_coef_access_ctrl = true,
};
struct sun4i_frontend_data {
bool has_coef_access_ctrl;
bool has_coef_rdy;
-
- struct {
- u32 horzphase;
- u32 vertphase[2];
- } ch_phase[2];
+ u32 ch_phase[2];
};
struct sun4i_frontend {
ret = v3d_job_init(v3d, file_priv, &bin->base,
v3d_job_free, args->in_sync_bcl);
if (ret) {
- kfree(bin);
v3d_job_put(&render->base);
kfree(bin);
return ret;
component_unbind_all(dev, drm);
gem_destroy:
vc4_gem_destroy(drm);
+ drm_mode_config_cleanup(drm);
vc4_bo_cache_destroy(drm);
dev_put:
drm_dev_put(drm);
static inline struct vc4_bo *
to_vc4_bo(struct drm_gem_object *bo)
{
- return (struct vc4_bo *)bo;
+ return container_of(to_drm_gem_cma_obj(bo), struct vc4_bo, base);
}
struct vc4_fence {
static inline struct vc4_fence *
to_vc4_fence(struct dma_fence *fence)
{
- return (struct vc4_fence *)fence;
+ return container_of(fence, struct vc4_fence, base);
}
struct vc4_seqno_cb {
static inline struct vc4_plane *
to_vc4_plane(struct drm_plane *plane)
{
- return (struct vc4_plane *)plane;
+ return container_of(plane, struct vc4_plane, base);
}
enum vc4_scaling_mode {
static inline struct vc4_plane_state *
to_vc4_plane_state(struct drm_plane_state *state)
{
- return (struct vc4_plane_state *)state;
+ return container_of(state, struct vc4_plane_state, base);
}
enum vc4_encoder_type {
static inline struct vc4_crtc *
to_vc4_crtc(struct drm_crtc *crtc)
{
- return (struct vc4_crtc *)crtc;
+ return container_of(crtc, struct vc4_crtc, base);
}
static inline const struct vc4_crtc_data *
static inline struct vc4_crtc_state *
to_vc4_crtc_state(struct drm_crtc_state *crtc_state)
{
- return (struct vc4_crtc_state *)crtc_state;
+ return container_of(crtc_state, struct vc4_crtc_state, base);
}
#define V3D_READ(offset) readl(vc4->v3d->regs + offset)
struct snd_soc_dai *dai)
{
struct vc4_hdmi *vc4_hdmi = dai_to_hdmi(dai);
+ struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base;
struct device *dev = &vc4_hdmi->pdev->dev;
u32 audio_packet_config, channel_mask;
u32 channel_map;
HDMI_WRITE(HDMI_AUDIO_PACKET_CONFIG, audio_packet_config);
vc4_hdmi_set_n_cts(vc4_hdmi);
+ vc4_hdmi_set_audio_infoframe(encoder);
+
return 0;
}
struct snd_soc_dai *dai)
{
struct vc4_hdmi *vc4_hdmi = dai_to_hdmi(dai);
- struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
- vc4_hdmi_set_audio_infoframe(encoder);
vc4_hdmi->audio.streaming = true;
if (vc4_hdmi->variant->phy_rng_enable)
};
static const struct snd_soc_component_driver vc4_hdmi_audio_component_drv = {
+ .name = "vc4-hdmi-codec-dai-component",
.controls = vc4_hdmi_audio_controls,
.num_controls = ARRAY_SIZE(vc4_hdmi_audio_controls),
.dapm_widgets = vc4_hdmi_audio_widgets,
module_init(coresight_init);
module_exit(coresight_exit);
+MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
MODULE_DESCRIPTION("Arm CoreSight tracer driver");
}
eattr->var = con;
con->con_attrs[attr_idx] = &eattr->attr.attr;
+ /*
+ * Initialize the dynamically allocated attribute
+ * to avoid LOCKDEP splat. See include/linux/sysfs.h
+ * for more details.
+ */
+ sysfs_attr_init(con->con_attrs[attr_idx]);
+
return 0;
}
u32 id;
int cpu = event->cpu;
cpumask_t *mask;
- struct coresight_device *sink;
+ struct coresight_device *sink = NULL;
struct etm_event_data *event_data = NULL;
event_data = alloc_event_data(cpu);
struct acpi_processor_cx *cx;
struct cpuidle_state *state;
- if (intel_idle_max_cstate_reached(cstate))
+ if (intel_idle_max_cstate_reached(cstate - 1))
break;
cx = &acpi_state_table.states[cstate];
/*
* The FSM uses a funny double locking where state is protected by both
* the handler_mutex and the spinlock. State is not allowed to change
- * away from a handler_mutex protected value without also holding
+ * to/from a handler_mutex protected value without also holding
* handler_mutex.
*/
- if (comp == RDMA_CM_CONNECT)
+ if (comp == RDMA_CM_CONNECT || exch == RDMA_CM_CONNECT)
lockdep_assert_held(&id_priv->handler_mutex);
spin_lock_irqsave(&id_priv->lock, flags);
return ret;
}
-int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
+/**
+ * rdma_connect_locked - Initiate an active connection request.
+ * @id: Connection identifier to connect.
+ * @conn_param: Connection information used for connected QPs.
+ *
+ * Same as rdma_connect() but can only be called from the
+ * RDMA_CM_EVENT_ROUTE_RESOLVED handler callback.
+ */
+int rdma_connect_locked(struct rdma_cm_id *id,
+ struct rdma_conn_param *conn_param)
{
struct rdma_id_private *id_priv =
container_of(id, struct rdma_id_private, id);
int ret;
- mutex_lock(&id_priv->handler_mutex);
- if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT)) {
- ret = -EINVAL;
- goto err_unlock;
- }
+ if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
+ return -EINVAL;
if (!id->qp) {
id_priv->qp_num = conn_param->qp_num;
ret = -ENOSYS;
if (ret)
goto err_state;
- mutex_unlock(&id_priv->handler_mutex);
return 0;
err_state:
cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
-err_unlock:
+ return ret;
+}
+EXPORT_SYMBOL(rdma_connect_locked);
+
+/**
+ * rdma_connect - Initiate an active connection request.
+ * @id: Connection identifier to connect.
+ * @conn_param: Connection information used for connected QPs.
+ *
+ * Users must have resolved a route for the rdma_cm_id to connect with by having
+ * called rdma_resolve_route before calling this routine.
+ *
+ * This call will either connect to a remote QP or obtain remote QP information
+ * for unconnected rdma_cm_id's. The actual operation is based on the
+ * rdma_cm_id's port space.
+ */
+int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
+{
+ struct rdma_id_private *id_priv =
+ container_of(id, struct rdma_id_private, id);
+ int ret;
+
+ mutex_lock(&id_priv->handler_mutex);
+ ret = rdma_connect_locked(id, conn_param);
mutex_unlock(&id_priv->handler_mutex);
return ret;
}
if (!rdma_is_port_valid(ib_dev, port_num))
return -EINVAL;
- if (!rdma_ib_or_roce(ib_dev, port_num))
- return -EOPNOTSUPP;
-
gid_attr = rdma_get_gid_attr(ib_dev, port_num, gid_index);
if (IS_ERR(gid_attr))
return PTR_ERR(gid_attr);
int err;
dev->port[port_num].roce.nb.notifier_call = mlx5_netdev_event;
- err = register_netdevice_notifier(&dev->port[port_num].roce.nb);
+ err = register_netdevice_notifier_net(mlx5_core_net(dev->mdev),
+ &dev->port[port_num].roce.nb);
if (err) {
dev->port[port_num].roce.nb.notifier_call = NULL;
return err;
static void mlx5_remove_netdev_notifier(struct mlx5_ib_dev *dev, u8 port_num)
{
if (dev->port[port_num].roce.nb.notifier_call) {
- unregister_netdevice_notifier(&dev->port[port_num].roce.nb);
+ unregister_netdevice_notifier_net(mlx5_core_net(dev->mdev),
+ &dev->port[port_num].roce.nb);
dev->port[port_num].roce.nb.notifier_call = NULL;
}
}
listener->qed_handle);
cm_id->rem_ref(cm_id);
+ kfree(listener);
return rc;
}
int rxe_av_chk_attr(struct rxe_dev *rxe, struct rdma_ah_attr *attr)
{
+ const struct ib_global_route *grh = rdma_ah_read_grh(attr);
struct rxe_port *port;
+ int type;
port = &rxe->port;
if (rdma_ah_get_ah_flags(attr) & IB_AH_GRH) {
- u8 sgid_index = rdma_ah_read_grh(attr)->sgid_index;
+ if (grh->sgid_index > port->attr.gid_tbl_len) {
+ pr_warn("invalid sgid index = %d\n",
+ grh->sgid_index);
+ return -EINVAL;
+ }
- if (sgid_index > port->attr.gid_tbl_len) {
- pr_warn("invalid sgid index = %d\n", sgid_index);
+ type = rdma_gid_attr_network_type(grh->sgid_attr);
+ if (type < RDMA_NETWORK_IPV4 ||
+ type > RDMA_NETWORK_IPV6) {
+ pr_warn("invalid network type for rdma_rxe = %d\n",
+ type);
return -EINVAL;
}
}
void rxe_av_fill_ip_info(struct rxe_av *av, struct rdma_ah_attr *attr)
{
const struct ib_gid_attr *sgid_attr = attr->grh.sgid_attr;
+ int ibtype;
+ int type;
rdma_gid2ip((struct sockaddr *)&av->sgid_addr, &sgid_attr->gid);
rdma_gid2ip((struct sockaddr *)&av->dgid_addr,
&rdma_ah_read_grh(attr)->dgid);
- av->network_type = rdma_gid_attr_network_type(sgid_attr);
+
+ ibtype = rdma_gid_attr_network_type(sgid_attr);
+
+ switch (ibtype) {
+ case RDMA_NETWORK_IPV4:
+ type = RXE_NETWORK_TYPE_IPV4;
+ break;
+ case RDMA_NETWORK_IPV6:
+ type = RXE_NETWORK_TYPE_IPV4;
+ break;
+ default:
+ /* not reached - checked in rxe_av_chk_attr */
+ type = 0;
+ break;
+ }
+
+ av->network_type = type;
}
struct rxe_av *rxe_get_av(struct rxe_pkt_info *pkt)
if (IS_ERR(attr))
return NULL;
- if (av->network_type == RXE_NETWORK_TYPE_IPV6)
+ if (av->network_type == RXE_NETWORK_TYPE_IPV4)
hdr_len = ETH_HLEN + sizeof(struct udphdr) +
sizeof(struct iphdr);
else
conn_param.private_data = (void *)&req_hdr;
conn_param.private_data_len = sizeof(struct iser_cm_hdr);
- ret = rdma_connect(cma_id, &conn_param);
+ ret = rdma_connect_locked(cma_id, &conn_param);
if (ret) {
iser_err("failure connecting: %d\n", ret);
goto failure;
uuid_copy(&msg.sess_uuid, &sess->s.uuid);
uuid_copy(&msg.paths_uuid, &clt->paths_uuid);
- err = rdma_connect(con->c.cm_id, ¶m);
+ err = rdma_connect_locked(con->c.cm_id, ¶m);
if (err)
- rtrs_err(clt, "rdma_connect(): %d\n", err);
+ rtrs_err(clt, "rdma_connect_locked(): %d\n", err);
return err;
}
}
node->avg_bw = node->init_avg;
node->peak_bw = node->init_peak;
+ if (provider->aggregate)
+ provider->aggregate(node, 0, node->init_avg, node->init_peak,
+ &node->avg_bw, &node->peak_bw);
provider->set(node, node);
node->avg_bw = 0;
node->peak_bw = 0;
int qcom_icc_set(struct icc_node *src, struct icc_node *dst)
{
struct qcom_icc_provider *qp;
+ struct qcom_icc_node *qn;
struct icc_node *node;
if (!src)
node = src;
qp = to_qcom_provider(node->provider);
+ qn = node->data;
+
+ qn->sum_avg[QCOM_ICC_BUCKET_AMC] = max_t(u64, qn->sum_avg[QCOM_ICC_BUCKET_AMC],
+ node->avg_bw);
+ qn->max_peak[QCOM_ICC_BUCKET_AMC] = max_t(u64, qn->max_peak[QCOM_ICC_BUCKET_AMC],
+ node->peak_bw);
qcom_icc_bcm_voter_commit(qp->voter);
return ret;
}
+ for (i = 0; i < qp->num_bcms; i++)
+ qcom_icc_bcm_init(qp->bcms[i], &pdev->dev);
+
for (i = 0; i < num_nodes; i++) {
size_t j;
}
data->num_nodes = num_nodes;
- for (i = 0; i < qp->num_bcms; i++)
- qcom_icc_bcm_init(qp->bcms[i], &pdev->dev);
-
platform_set_drvdata(pdev, qp);
return 0;
DEFINE_QBCM(bcm_sh0, "SH0", true, &qns_llcc);
DEFINE_QBCM(bcm_mm0, "MM0", false, &qns_mem_noc_hf);
DEFINE_QBCM(bcm_sh1, "SH1", false, &qns_apps_io);
-DEFINE_QBCM(bcm_mm1, "MM1", false, &qxm_camnoc_hf0_uncomp, &qxm_camnoc_hf1_uncomp, &qxm_camnoc_sf_uncomp, &qxm_camnoc_hf0, &qxm_camnoc_hf1, &qxm_mdp0, &qxm_mdp1);
+DEFINE_QBCM(bcm_mm1, "MM1", true, &qxm_camnoc_hf0_uncomp, &qxm_camnoc_hf1_uncomp, &qxm_camnoc_sf_uncomp, &qxm_camnoc_hf0, &qxm_camnoc_hf1, &qxm_mdp0, &qxm_mdp1);
DEFINE_QBCM(bcm_sh2, "SH2", false, &qns_memnoc_snoc);
DEFINE_QBCM(bcm_mm2, "MM2", false, &qns2_mem_noc);
DEFINE_QBCM(bcm_sh3, "SH3", false, &acm_tcu);
return ret;
}
+ for (i = 0; i < qp->num_bcms; i++)
+ qcom_icc_bcm_init(qp->bcms[i], &pdev->dev);
+
for (i = 0; i < num_nodes; i++) {
size_t j;
}
data->num_nodes = num_nodes;
- for (i = 0; i < qp->num_bcms; i++)
- qcom_icc_bcm_init(qp->bcms[i], &pdev->dev);
-
platform_set_drvdata(pdev, qp);
return 0;
return ret;
}
+ for (i = 0; i < qp->num_bcms; i++)
+ qcom_icc_bcm_init(qp->bcms[i], &pdev->dev);
+
for (i = 0; i < num_nodes; i++) {
size_t j;
}
data->num_nodes = num_nodes;
- for (i = 0; i < qp->num_bcms; i++)
- qcom_icc_bcm_init(qp->bcms[i], &pdev->dev);
-
platform_set_drvdata(pdev, qp);
return 0;
.driver = {
.name = "qnoc-sm8150",
.of_match_table = qnoc_of_match,
+ .sync_state = icc_sync_state,
},
};
module_platform_driver(qnoc_driver);
return ret;
}
+ for (i = 0; i < qp->num_bcms; i++)
+ qcom_icc_bcm_init(qp->bcms[i], &pdev->dev);
+
for (i = 0; i < num_nodes; i++) {
size_t j;
}
data->num_nodes = num_nodes;
- for (i = 0; i < qp->num_bcms; i++)
- qcom_icc_bcm_init(qp->bcms[i], &pdev->dev);
-
platform_set_drvdata(pdev, qp);
return 0;
.driver = {
.name = "qnoc-sm8250",
.of_match_table = qnoc_of_match,
+ .sync_state = icc_sync_state,
},
};
module_platform_driver(qnoc_driver);
MPT_SCSI_HOST *hd;
int sz1;
- if((hd = shost_priv(host)) == NULL)
- return;
+ if (host == NULL)
+ hd = NULL;
+ else
+ hd = shost_priv(host);
mptscsih_shutdown(pdev);
"Free'd ScsiLookup (%d) memory\n",
ioc->name, sz1));
- kfree(hd->info_kbuf);
+ if (hd)
+ kfree(hd->info_kbuf);
/* NULL the Scsi_Host pointer
*/
ioc->sh = NULL;
- scsi_host_put(host);
-
+ if (host)
+ scsi_host_put(host);
mpt_detach(pdev);
}
source "drivers/misc/altera-stapl/Kconfig"
source "drivers/misc/mei/Kconfig"
source "drivers/misc/vmw_vmci/Kconfig"
-source "drivers/misc/mic/Kconfig"
source "drivers/misc/genwqe/Kconfig"
source "drivers/misc/echo/Kconfig"
source "drivers/misc/cxl/Kconfig"
obj-$(CONFIG_LATTICE_ECP3_CONFIG) += lattice-ecp3-config.o
obj-$(CONFIG_SRAM) += sram.o
obj-$(CONFIG_SRAM_EXEC) += sram-exec.o
-obj-y += mic/
obj-$(CONFIG_GENWQE) += genwqe/
obj-$(CONFIG_ECHO) += echo/
obj-$(CONFIG_CXL_BASE) += cxl/
u8 type;
u8 length;
u8 ext_payload[2];
- u8 hdr[0];
+ u8 hdr[];
};
/**
u8 count;
u8 size;
u8 reserved[2];
- struct mei_ext_hdr hdrs[0];
+ struct mei_ext_hdr hdrs[];
};
/*
u32 dma_ring:1;
u32 internal:1;
u32 msg_complete:1;
- u32 extension[0];
+ u32 extension[];
} __packed;
/* The length is up to 9 bits */
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-menu "Intel MIC & related support"
-
-config INTEL_MIC_BUS
- tristate "Intel MIC Bus Driver"
- depends on 64BIT && PCI && X86
- select DMA_OPS
- help
- This option is selected by any driver which registers a
- device or driver on the MIC Bus, such as CONFIG_INTEL_MIC_HOST,
- CONFIG_INTEL_MIC_CARD, CONFIG_INTEL_MIC_X100_DMA etc.
-
- If you are building a host/card kernel with an Intel MIC device
- then say M (recommended) or Y, else say N. If unsure say N.
-
- More information about the Intel MIC family as well as the Linux
- OS and tools for MIC to use with this driver are available from
- <http://software.intel.com/en-us/mic-developer>.
-
-config SCIF_BUS
- tristate "SCIF Bus Driver"
- depends on 64BIT && PCI && X86
- select DMA_OPS
- help
- This option is selected by any driver which registers a
- device or driver on the SCIF Bus, such as CONFIG_INTEL_MIC_HOST
- and CONFIG_INTEL_MIC_CARD.
-
- If you are building a host/card kernel with an Intel MIC device
- then say M (recommended) or Y, else say N. If unsure say N.
-
- More information about the Intel MIC family as well as the Linux
- OS and tools for MIC to use with this driver are available from
- <http://software.intel.com/en-us/mic-developer>.
-
-config VOP_BUS
- tristate "VOP Bus Driver"
- depends on HAS_DMA
- select DMA_OPS
- help
- This option is selected by any driver which registers a
- device or driver on the VOP Bus, such as CONFIG_INTEL_MIC_HOST
- and CONFIG_INTEL_MIC_CARD.
-
- If you are building a host/card kernel with an Intel MIC device
- then say M (recommended) or Y, else say N. If unsure say N.
-
- More information about the Intel MIC family as well as the Linux
- OS and tools for MIC to use with this driver are available from
- <http://software.intel.com/en-us/mic-developer>.
-
-config INTEL_MIC_HOST
- tristate "Intel MIC Host Driver"
- depends on 64BIT && PCI && X86
- depends on INTEL_MIC_BUS && SCIF_BUS && MIC_COSM && VOP_BUS
- select DMA_OPS
- help
- This enables Host Driver support for the Intel Many Integrated
- Core (MIC) family of PCIe form factor coprocessor devices that
- run a 64 bit Linux OS. The driver manages card OS state and
- enables communication between host and card. Intel MIC X100
- devices are currently supported.
-
- If you are building a host kernel with an Intel MIC device then
- say M (recommended) or Y, else say N. If unsure say N.
-
- More information about the Intel MIC family as well as the Linux
- OS and tools for MIC to use with this driver are available from
- <http://software.intel.com/en-us/mic-developer>.
-
-config INTEL_MIC_CARD
- tristate "Intel MIC Card Driver"
- depends on 64BIT && X86
- depends on INTEL_MIC_BUS && SCIF_BUS && MIC_COSM && VOP_BUS
- select VIRTIO
- help
- This enables card driver support for the Intel Many Integrated
- Core (MIC) device family. The card driver communicates shutdown/
- crash events to the host and allows registration/configuration of
- virtio devices. Intel MIC X100 devices are currently supported.
-
- If you are building a card kernel for an Intel MIC device then
- say M (recommended) or Y, else say N. If unsure say N.
-
- For more information see
- <http://software.intel.com/en-us/mic-developer>.
-
-config SCIF
- tristate "SCIF Driver"
- depends on 64BIT && PCI && X86 && SCIF_BUS && IOMMU_SUPPORT
- select IOMMU_IOVA
- help
- This enables SCIF Driver support for the Intel Many Integrated
- Core (MIC) family of PCIe form factor coprocessor devices that
- run a 64 bit Linux OS. The Symmetric Communication Interface
- (SCIF (pronounced as skiff)) is a low level communications API
- across PCIe currently implemented for MIC.
-
- If you are building a host kernel with an Intel MIC device then
- say M (recommended) or Y, else say N. If unsure say N.
-
- More information about the Intel MIC family as well as the Linux
- OS and tools for MIC to use with this driver are available from
- <http://software.intel.com/en-us/mic-developer>.
-
-config MIC_COSM
- tristate "Intel MIC Coprocessor State Management (COSM) Drivers"
- depends on 64BIT && PCI && X86 && SCIF
- help
- This enables COSM driver support for the Intel Many
- Integrated Core (MIC) family of PCIe form factor coprocessor
- devices. COSM drivers implement functions such as boot,
- shutdown, reset and reboot of MIC devices.
-
- If you are building a host kernel with an Intel MIC device then
- say M (recommended) or Y, else say N. If unsure say N.
-
- More information about the Intel MIC family as well as the Linux
- OS and tools for MIC to use with this driver are available from
- <http://software.intel.com/en-us/mic-developer>.
-
-config VOP
- tristate "VOP Driver"
- depends on VOP_BUS
- select VHOST_RING
- select VIRTIO
- help
- This enables VOP (Virtio over PCIe) Driver support for the Intel
- Many Integrated Core (MIC) family of PCIe form factor coprocessor
- devices. The VOP driver allows virtio drivers, e.g. net, console
- and block drivers, on the card connect to user space virtio
- devices on the host.
-
- If you are building a host kernel with an Intel MIC device then
- say M (recommended) or Y, else say N. If unsure say N.
-
- More information about the Intel MIC family as well as the Linux
- OS and tools for MIC to use with this driver are available from
- <http://software.intel.com/en-us/mic-developer>.
-
-endmenu
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0
-#
-# Makefile - Intel MIC Linux driver.
-# Copyright(c) 2013, Intel Corporation.
-#
-obj-$(CONFIG_INTEL_MIC_HOST) += host/
-obj-$(CONFIG_INTEL_MIC_CARD) += card/
-obj-y += bus/
-obj-$(CONFIG_SCIF) += scif/
-obj-$(CONFIG_MIC_COSM) += cosm/
-obj-$(CONFIG_MIC_COSM) += cosm_client/
-obj-$(CONFIG_VOP) += vop/
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Makefile - Intel MIC Linux driver.
-# Copyright(c) 2014, Intel Corporation.
-#
-obj-$(CONFIG_INTEL_MIC_BUS) += mic_bus.o
-obj-$(CONFIG_SCIF_BUS) += scif_bus.o
-obj-$(CONFIG_MIC_COSM) += cosm_bus.o
-obj-$(CONFIG_VOP_BUS) += vop_bus.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2015 Intel Corporation.
- *
- * Intel MIC COSM Bus Driver
- */
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/idr.h>
-#include "cosm_bus.h"
-
-/* Unique numbering for cosm devices. */
-static DEFINE_IDA(cosm_index_ida);
-
-static int cosm_dev_probe(struct device *d)
-{
- struct cosm_device *dev = dev_to_cosm(d);
- struct cosm_driver *drv = drv_to_cosm(dev->dev.driver);
-
- return drv->probe(dev);
-}
-
-static int cosm_dev_remove(struct device *d)
-{
- struct cosm_device *dev = dev_to_cosm(d);
- struct cosm_driver *drv = drv_to_cosm(dev->dev.driver);
-
- drv->remove(dev);
- return 0;
-}
-
-static struct bus_type cosm_bus = {
- .name = "cosm_bus",
- .probe = cosm_dev_probe,
- .remove = cosm_dev_remove,
-};
-
-int cosm_register_driver(struct cosm_driver *driver)
-{
- driver->driver.bus = &cosm_bus;
- return driver_register(&driver->driver);
-}
-EXPORT_SYMBOL_GPL(cosm_register_driver);
-
-void cosm_unregister_driver(struct cosm_driver *driver)
-{
- driver_unregister(&driver->driver);
-}
-EXPORT_SYMBOL_GPL(cosm_unregister_driver);
-
-static inline void cosm_release_dev(struct device *d)
-{
- struct cosm_device *cdev = dev_to_cosm(d);
-
- kfree(cdev);
-}
-
-struct cosm_device *
-cosm_register_device(struct device *pdev, struct cosm_hw_ops *hw_ops)
-{
- struct cosm_device *cdev;
- int ret;
-
- cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
- if (!cdev)
- return ERR_PTR(-ENOMEM);
-
- cdev->dev.parent = pdev;
- cdev->dev.release = cosm_release_dev;
- cdev->hw_ops = hw_ops;
- dev_set_drvdata(&cdev->dev, cdev);
- cdev->dev.bus = &cosm_bus;
-
- /* Assign a unique device index and hence name */
- ret = ida_simple_get(&cosm_index_ida, 0, 0, GFP_KERNEL);
- if (ret < 0)
- goto free_cdev;
-
- cdev->index = ret;
- cdev->dev.id = ret;
- dev_set_name(&cdev->dev, "cosm-dev%u", cdev->index);
-
- ret = device_register(&cdev->dev);
- if (ret)
- goto ida_remove;
- return cdev;
-ida_remove:
- ida_simple_remove(&cosm_index_ida, cdev->index);
-free_cdev:
- put_device(&cdev->dev);
- return ERR_PTR(ret);
-}
-EXPORT_SYMBOL_GPL(cosm_register_device);
-
-void cosm_unregister_device(struct cosm_device *dev)
-{
- int index = dev->index; /* save for after device release */
-
- device_unregister(&dev->dev);
- ida_simple_remove(&cosm_index_ida, index);
-}
-EXPORT_SYMBOL_GPL(cosm_unregister_device);
-
-struct cosm_device *cosm_find_cdev_by_id(int id)
-{
- struct device *dev = subsys_find_device_by_id(&cosm_bus, id, NULL);
-
- return dev ? container_of(dev, struct cosm_device, dev) : NULL;
-}
-EXPORT_SYMBOL_GPL(cosm_find_cdev_by_id);
-
-static int __init cosm_init(void)
-{
- return bus_register(&cosm_bus);
-}
-
-static void __exit cosm_exit(void)
-{
- bus_unregister(&cosm_bus);
- ida_destroy(&cosm_index_ida);
-}
-
-core_initcall(cosm_init);
-module_exit(cosm_exit);
-
-MODULE_AUTHOR("Intel Corporation");
-MODULE_DESCRIPTION("Intel(R) MIC card OS state management bus driver");
-MODULE_LICENSE("GPL v2");
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2015 Intel Corporation.
- *
- * Intel MIC COSM Bus Driver
- */
-#ifndef _COSM_BUS_H_
-#define _COSM_BUS_H_
-
-#include <linux/scif.h>
-#include <linux/mic_common.h>
-#include "../common/mic_dev.h"
-
-/**
- * cosm_device - representation of a cosm device
- *
- * @attr_group: Pointer to list of sysfs attribute groups.
- * @sdev: Device for sysfs entries.
- * @state: MIC state.
- * @prev_state: MIC state previous to MIC_RESETTING
- * @shutdown_status: MIC status reported by card for shutdown/crashes.
- * @shutdown_status_int: Internal shutdown status maintained by the driver
- * @cosm_mutex: Mutex for synchronizing access to data structures.
- * @reset_trigger_work: Work for triggering reset requests.
- * @scif_work: Work for handling per device SCIF connections
- * @cmdline: Kernel command line.
- * @firmware: Firmware file name.
- * @ramdisk: Ramdisk file name.
- * @bootmode: Boot mode i.e. "linux" or "elf" for flash updates.
- * @log_buf_addr: Log buffer address for MIC.
- * @log_buf_len: Log buffer length address for MIC.
- * @state_sysfs: Sysfs dirent for notifying ring 3 about MIC state changes.
- * @hw_ops: the hardware bus ops for this device.
- * @dev: underlying device.
- * @index: unique position on the cosm bus
- * @dbg_dir: debug fs directory
- * @newepd: new endpoint from scif accept to be assigned to this cdev
- * @epd: SCIF endpoint for this cdev
- * @heartbeat_watchdog_enable: if heartbeat watchdog is enabled for this cdev
- * @sysfs_heartbeat_enable: sysfs setting for disabling heartbeat notification
- */
-struct cosm_device {
- const struct attribute_group **attr_group;
- struct device *sdev;
- u8 state;
- u8 prev_state;
- u8 shutdown_status;
- u8 shutdown_status_int;
- struct mutex cosm_mutex;
- struct work_struct reset_trigger_work;
- struct work_struct scif_work;
- char *cmdline;
- char *firmware;
- char *ramdisk;
- char *bootmode;
- void *log_buf_addr;
- int *log_buf_len;
- struct kernfs_node *state_sysfs;
- struct cosm_hw_ops *hw_ops;
- struct device dev;
- int index;
- struct dentry *dbg_dir;
- scif_epd_t newepd;
- scif_epd_t epd;
- bool heartbeat_watchdog_enable;
- bool sysfs_heartbeat_enable;
-};
-
-/**
- * cosm_driver - operations for a cosm driver
- *
- * @driver: underlying device driver (populate name and owner).
- * @probe: the function to call when a device is found. Returns 0 or -errno.
- * @remove: the function to call when a device is removed.
- */
-struct cosm_driver {
- struct device_driver driver;
- int (*probe)(struct cosm_device *dev);
- void (*remove)(struct cosm_device *dev);
-};
-
-/**
- * cosm_hw_ops - cosm bus ops
- *
- * @reset: trigger MIC reset
- * @force_reset: force MIC reset
- * @post_reset: inform MIC reset is complete
- * @ready: is MIC ready for OS download
- * @start: boot MIC
- * @stop: prepare MIC for reset
- * @family: return MIC HW family string
- * @stepping: return MIC HW stepping string
- * @aper: return MIC PCIe aperture
- */
-struct cosm_hw_ops {
- void (*reset)(struct cosm_device *cdev);
- void (*force_reset)(struct cosm_device *cdev);
- void (*post_reset)(struct cosm_device *cdev, enum mic_states state);
- bool (*ready)(struct cosm_device *cdev);
- int (*start)(struct cosm_device *cdev, int id);
- void (*stop)(struct cosm_device *cdev, bool force);
- ssize_t (*family)(struct cosm_device *cdev, char *buf);
- ssize_t (*stepping)(struct cosm_device *cdev, char *buf);
- struct mic_mw *(*aper)(struct cosm_device *cdev);
-};
-
-struct cosm_device *
-cosm_register_device(struct device *pdev, struct cosm_hw_ops *hw_ops);
-void cosm_unregister_device(struct cosm_device *dev);
-int cosm_register_driver(struct cosm_driver *drv);
-void cosm_unregister_driver(struct cosm_driver *drv);
-struct cosm_device *cosm_find_cdev_by_id(int id);
-
-static inline struct cosm_device *dev_to_cosm(struct device *dev)
-{
- return container_of(dev, struct cosm_device, dev);
-}
-
-static inline struct cosm_driver *drv_to_cosm(struct device_driver *drv)
-{
- return container_of(drv, struct cosm_driver, driver);
-}
-#endif /* _COSM_BUS_H */
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel MIC Bus driver.
- *
- * This implementation is very similar to the the virtio bus driver
- * implementation @ drivers/virtio/virtio.c
- */
-#include <linux/dma-map-ops.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/idr.h>
-#include <linux/mic_bus.h>
-
-static ssize_t device_show(struct device *d,
- struct device_attribute *attr, char *buf)
-{
- struct mbus_device *dev = dev_to_mbus(d);
- return sprintf(buf, "0x%04x\n", dev->id.device);
-}
-static DEVICE_ATTR_RO(device);
-
-static ssize_t vendor_show(struct device *d,
- struct device_attribute *attr, char *buf)
-{
- struct mbus_device *dev = dev_to_mbus(d);
- return sprintf(buf, "0x%04x\n", dev->id.vendor);
-}
-static DEVICE_ATTR_RO(vendor);
-
-static ssize_t modalias_show(struct device *d,
- struct device_attribute *attr, char *buf)
-{
- struct mbus_device *dev = dev_to_mbus(d);
- return sprintf(buf, "mbus:d%08Xv%08X\n",
- dev->id.device, dev->id.vendor);
-}
-static DEVICE_ATTR_RO(modalias);
-
-static struct attribute *mbus_dev_attrs[] = {
- &dev_attr_device.attr,
- &dev_attr_vendor.attr,
- &dev_attr_modalias.attr,
- NULL,
-};
-ATTRIBUTE_GROUPS(mbus_dev);
-
-static inline int mbus_id_match(const struct mbus_device *dev,
- const struct mbus_device_id *id)
-{
- if (id->device != dev->id.device && id->device != MBUS_DEV_ANY_ID)
- return 0;
-
- return id->vendor == MBUS_DEV_ANY_ID || id->vendor == dev->id.vendor;
-}
-
-/*
- * This looks through all the IDs a driver claims to support. If any of them
- * match, we return 1 and the kernel will call mbus_dev_probe().
- */
-static int mbus_dev_match(struct device *dv, struct device_driver *dr)
-{
- unsigned int i;
- struct mbus_device *dev = dev_to_mbus(dv);
- const struct mbus_device_id *ids;
-
- ids = drv_to_mbus(dr)->id_table;
- for (i = 0; ids[i].device; i++)
- if (mbus_id_match(dev, &ids[i]))
- return 1;
- return 0;
-}
-
-static int mbus_uevent(struct device *dv, struct kobj_uevent_env *env)
-{
- struct mbus_device *dev = dev_to_mbus(dv);
-
- return add_uevent_var(env, "MODALIAS=mbus:d%08Xv%08X",
- dev->id.device, dev->id.vendor);
-}
-
-static int mbus_dev_probe(struct device *d)
-{
- int err;
- struct mbus_device *dev = dev_to_mbus(d);
- struct mbus_driver *drv = drv_to_mbus(dev->dev.driver);
-
- err = drv->probe(dev);
- if (!err)
- if (drv->scan)
- drv->scan(dev);
- return err;
-}
-
-static int mbus_dev_remove(struct device *d)
-{
- struct mbus_device *dev = dev_to_mbus(d);
- struct mbus_driver *drv = drv_to_mbus(dev->dev.driver);
-
- drv->remove(dev);
- return 0;
-}
-
-static struct bus_type mic_bus = {
- .name = "mic_bus",
- .match = mbus_dev_match,
- .dev_groups = mbus_dev_groups,
- .uevent = mbus_uevent,
- .probe = mbus_dev_probe,
- .remove = mbus_dev_remove,
-};
-
-int mbus_register_driver(struct mbus_driver *driver)
-{
- driver->driver.bus = &mic_bus;
- return driver_register(&driver->driver);
-}
-EXPORT_SYMBOL_GPL(mbus_register_driver);
-
-void mbus_unregister_driver(struct mbus_driver *driver)
-{
- driver_unregister(&driver->driver);
-}
-EXPORT_SYMBOL_GPL(mbus_unregister_driver);
-
-static void mbus_release_dev(struct device *d)
-{
- struct mbus_device *mbdev = dev_to_mbus(d);
- kfree(mbdev);
-}
-
-struct mbus_device *
-mbus_register_device(struct device *pdev, int id, const struct dma_map_ops *dma_ops,
- struct mbus_hw_ops *hw_ops, int index,
- void __iomem *mmio_va)
-{
- int ret;
- struct mbus_device *mbdev;
-
- mbdev = kzalloc(sizeof(*mbdev), GFP_KERNEL);
- if (!mbdev)
- return ERR_PTR(-ENOMEM);
-
- mbdev->mmio_va = mmio_va;
- mbdev->dev.parent = pdev;
- mbdev->id.device = id;
- mbdev->id.vendor = MBUS_DEV_ANY_ID;
- mbdev->dev.dma_ops = dma_ops;
- mbdev->dev.dma_mask = &mbdev->dev.coherent_dma_mask;
- dma_set_mask(&mbdev->dev, DMA_BIT_MASK(64));
- mbdev->dev.release = mbus_release_dev;
- mbdev->hw_ops = hw_ops;
- mbdev->dev.bus = &mic_bus;
- mbdev->index = index;
- dev_set_name(&mbdev->dev, "mbus-dev%u", mbdev->index);
- /*
- * device_register() causes the bus infrastructure to look for a
- * matching driver.
- */
- ret = device_register(&mbdev->dev);
- if (ret)
- goto free_mbdev;
- return mbdev;
-free_mbdev:
- put_device(&mbdev->dev);
- return ERR_PTR(ret);
-}
-EXPORT_SYMBOL_GPL(mbus_register_device);
-
-void mbus_unregister_device(struct mbus_device *mbdev)
-{
- device_unregister(&mbdev->dev);
-}
-EXPORT_SYMBOL_GPL(mbus_unregister_device);
-
-static int __init mbus_init(void)
-{
- return bus_register(&mic_bus);
-}
-
-static void __exit mbus_exit(void)
-{
- bus_unregister(&mic_bus);
-}
-
-core_initcall(mbus_init);
-module_exit(mbus_exit);
-
-MODULE_AUTHOR("Intel Corporation");
-MODULE_DESCRIPTION("Intel(R) MIC Bus driver");
-MODULE_LICENSE("GPL v2");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel Symmetric Communications Interface Bus driver.
- */
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/idr.h>
-#include <linux/dma-map-ops.h>
-
-#include "scif_bus.h"
-
-static ssize_t device_show(struct device *d,
- struct device_attribute *attr, char *buf)
-{
- struct scif_hw_dev *dev = dev_to_scif(d);
-
- return sprintf(buf, "0x%04x\n", dev->id.device);
-}
-static DEVICE_ATTR_RO(device);
-
-static ssize_t vendor_show(struct device *d,
- struct device_attribute *attr, char *buf)
-{
- struct scif_hw_dev *dev = dev_to_scif(d);
-
- return sprintf(buf, "0x%04x\n", dev->id.vendor);
-}
-static DEVICE_ATTR_RO(vendor);
-
-static ssize_t modalias_show(struct device *d,
- struct device_attribute *attr, char *buf)
-{
- struct scif_hw_dev *dev = dev_to_scif(d);
-
- return sprintf(buf, "scif:d%08Xv%08X\n",
- dev->id.device, dev->id.vendor);
-}
-static DEVICE_ATTR_RO(modalias);
-
-static struct attribute *scif_dev_attrs[] = {
- &dev_attr_device.attr,
- &dev_attr_vendor.attr,
- &dev_attr_modalias.attr,
- NULL,
-};
-ATTRIBUTE_GROUPS(scif_dev);
-
-static inline int scif_id_match(const struct scif_hw_dev *dev,
- const struct scif_hw_dev_id *id)
-{
- if (id->device != dev->id.device && id->device != SCIF_DEV_ANY_ID)
- return 0;
-
- return id->vendor == SCIF_DEV_ANY_ID || id->vendor == dev->id.vendor;
-}
-
-/*
- * This looks through all the IDs a driver claims to support. If any of them
- * match, we return 1 and the kernel will call scif_dev_probe().
- */
-static int scif_dev_match(struct device *dv, struct device_driver *dr)
-{
- unsigned int i;
- struct scif_hw_dev *dev = dev_to_scif(dv);
- const struct scif_hw_dev_id *ids;
-
- ids = drv_to_scif(dr)->id_table;
- for (i = 0; ids[i].device; i++)
- if (scif_id_match(dev, &ids[i]))
- return 1;
- return 0;
-}
-
-static int scif_uevent(struct device *dv, struct kobj_uevent_env *env)
-{
- struct scif_hw_dev *dev = dev_to_scif(dv);
-
- return add_uevent_var(env, "MODALIAS=scif:d%08Xv%08X",
- dev->id.device, dev->id.vendor);
-}
-
-static int scif_dev_probe(struct device *d)
-{
- struct scif_hw_dev *dev = dev_to_scif(d);
- struct scif_driver *drv = drv_to_scif(dev->dev.driver);
-
- return drv->probe(dev);
-}
-
-static int scif_dev_remove(struct device *d)
-{
- struct scif_hw_dev *dev = dev_to_scif(d);
- struct scif_driver *drv = drv_to_scif(dev->dev.driver);
-
- drv->remove(dev);
- return 0;
-}
-
-static struct bus_type scif_bus = {
- .name = "scif_bus",
- .match = scif_dev_match,
- .dev_groups = scif_dev_groups,
- .uevent = scif_uevent,
- .probe = scif_dev_probe,
- .remove = scif_dev_remove,
-};
-
-int scif_register_driver(struct scif_driver *driver)
-{
- driver->driver.bus = &scif_bus;
- return driver_register(&driver->driver);
-}
-EXPORT_SYMBOL_GPL(scif_register_driver);
-
-void scif_unregister_driver(struct scif_driver *driver)
-{
- driver_unregister(&driver->driver);
-}
-EXPORT_SYMBOL_GPL(scif_unregister_driver);
-
-static void scif_release_dev(struct device *d)
-{
- struct scif_hw_dev *sdev = dev_to_scif(d);
-
- kfree(sdev);
-}
-
-struct scif_hw_dev *
-scif_register_device(struct device *pdev, int id, const struct dma_map_ops *dma_ops,
- struct scif_hw_ops *hw_ops, u8 dnode, u8 snode,
- struct mic_mw *mmio, struct mic_mw *aper, void *dp,
- void __iomem *rdp, struct dma_chan **chan, int num_chan,
- bool card_rel_da)
-{
- int ret;
- struct scif_hw_dev *sdev;
-
- sdev = kzalloc(sizeof(*sdev), GFP_KERNEL);
- if (!sdev)
- return ERR_PTR(-ENOMEM);
-
- sdev->dev.parent = pdev;
- sdev->id.device = id;
- sdev->id.vendor = SCIF_DEV_ANY_ID;
- sdev->dev.dma_ops = dma_ops;
- sdev->dev.release = scif_release_dev;
- sdev->hw_ops = hw_ops;
- sdev->dnode = dnode;
- sdev->snode = snode;
- dev_set_drvdata(&sdev->dev, sdev);
- sdev->dev.bus = &scif_bus;
- sdev->mmio = mmio;
- sdev->aper = aper;
- sdev->dp = dp;
- sdev->rdp = rdp;
- sdev->dev.dma_mask = &sdev->dev.coherent_dma_mask;
- dma_set_mask(&sdev->dev, DMA_BIT_MASK(64));
- sdev->dma_ch = chan;
- sdev->num_dma_ch = num_chan;
- sdev->card_rel_da = card_rel_da;
- dev_set_name(&sdev->dev, "scif-dev%u", sdev->dnode);
- /*
- * device_register() causes the bus infrastructure to look for a
- * matching driver.
- */
- ret = device_register(&sdev->dev);
- if (ret)
- goto free_sdev;
- return sdev;
-free_sdev:
- put_device(&sdev->dev);
- return ERR_PTR(ret);
-}
-EXPORT_SYMBOL_GPL(scif_register_device);
-
-void scif_unregister_device(struct scif_hw_dev *sdev)
-{
- device_unregister(&sdev->dev);
-}
-EXPORT_SYMBOL_GPL(scif_unregister_device);
-
-static int __init scif_init(void)
-{
- return bus_register(&scif_bus);
-}
-
-static void __exit scif_exit(void)
-{
- bus_unregister(&scif_bus);
-}
-
-core_initcall(scif_init);
-module_exit(scif_exit);
-
-MODULE_AUTHOR("Intel Corporation");
-MODULE_DESCRIPTION("Intel(R) SCIF Bus driver");
-MODULE_LICENSE("GPL v2");
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel Symmetric Communications Interface Bus driver.
- */
-#ifndef _SCIF_BUS_H_
-#define _SCIF_BUS_H_
-/*
- * Everything a scif driver needs to work with any particular scif
- * hardware abstraction layer.
- */
-#include <linux/dma-map-ops.h>
-
-#include <linux/mic_common.h>
-#include "../common/mic_dev.h"
-
-struct scif_hw_dev_id {
- u32 device;
- u32 vendor;
-};
-
-#define MIC_SCIF_DEV 1
-#define SCIF_DEV_ANY_ID 0xffffffff
-
-/**
- * scif_hw_dev - representation of a hardware device abstracted for scif
- * @hw_ops: the hardware ops supported by this device
- * @id: the device type identification (used to match it with a driver)
- * @mmio: MMIO memory window
- * @aper: Aperture memory window
- * @dev: underlying device
- * @dnode - The destination node which this device will communicate with.
- * @snode - The source node for this device.
- * @dp - Self device page
- * @rdp - Remote device page
- * @dma_ch - Array of DMA channels
- * @num_dma_ch - Number of DMA channels available
- * @card_rel_da - Set to true if DMA addresses programmed in the DMA engine
- * are relative to the card point of view
- */
-struct scif_hw_dev {
- struct scif_hw_ops *hw_ops;
- struct scif_hw_dev_id id;
- struct mic_mw *mmio;
- struct mic_mw *aper;
- struct device dev;
- u8 dnode;
- u8 snode;
- void *dp;
- void __iomem *rdp;
- struct dma_chan **dma_ch;
- int num_dma_ch;
- bool card_rel_da;
-};
-
-/**
- * scif_driver - operations for a scif I/O driver
- * @driver: underlying device driver (populate name and owner).
- * @id_table: the ids serviced by this driver.
- * @probe: the function to call when a device is found. Returns 0 or -errno.
- * @remove: the function to call when a device is removed.
- */
-struct scif_driver {
- struct device_driver driver;
- const struct scif_hw_dev_id *id_table;
- int (*probe)(struct scif_hw_dev *dev);
- void (*remove)(struct scif_hw_dev *dev);
-};
-
-/**
- * scif_hw_ops - Hardware operations for accessing a SCIF device on the SCIF bus.
- *
- * @next_db: Obtain the next available doorbell.
- * @request_irq: Request an interrupt on a particular doorbell.
- * @free_irq: Free an interrupt requested previously.
- * @ack_interrupt: acknowledge an interrupt in the ISR.
- * @send_intr: Send an interrupt to the remote node on a specified doorbell.
- * @send_p2p_intr: Send an interrupt to the peer node on a specified doorbell
- * which is specifically targeted for a peer to peer node.
- * @remap: Map a buffer with the specified physical address and length.
- * @unmap: Unmap a buffer previously mapped.
- */
-struct scif_hw_ops {
- int (*next_db)(struct scif_hw_dev *sdev);
- struct mic_irq * (*request_irq)(struct scif_hw_dev *sdev,
- irqreturn_t (*func)(int irq,
- void *data),
- const char *name, void *data,
- int db);
- void (*free_irq)(struct scif_hw_dev *sdev,
- struct mic_irq *cookie, void *data);
- void (*ack_interrupt)(struct scif_hw_dev *sdev, int num);
- void (*send_intr)(struct scif_hw_dev *sdev, int db);
- void (*send_p2p_intr)(struct scif_hw_dev *sdev, int db,
- struct mic_mw *mw);
- void __iomem * (*remap)(struct scif_hw_dev *sdev,
- phys_addr_t pa, size_t len);
- void (*unmap)(struct scif_hw_dev *sdev, void __iomem *va);
-};
-
-int scif_register_driver(struct scif_driver *driver);
-void scif_unregister_driver(struct scif_driver *driver);
-struct scif_hw_dev *
-scif_register_device(struct device *pdev, int id,
- const struct dma_map_ops *dma_ops,
- struct scif_hw_ops *hw_ops, u8 dnode, u8 snode,
- struct mic_mw *mmio, struct mic_mw *aper,
- void *dp, void __iomem *rdp,
- struct dma_chan **chan, int num_chan,
- bool card_rel_da);
-void scif_unregister_device(struct scif_hw_dev *sdev);
-
-static inline struct scif_hw_dev *dev_to_scif(struct device *dev)
-{
- return container_of(dev, struct scif_hw_dev, dev);
-}
-
-static inline struct scif_driver *drv_to_scif(struct device_driver *drv)
-{
- return container_of(drv, struct scif_driver, driver);
-}
-#endif /* _SCIF_BUS_H */
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2016 Intel Corporation.
- *
- * Intel Virtio Over PCIe (VOP) Bus driver.
- */
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/idr.h>
-#include <linux/dma-map-ops.h>
-
-#include "vop_bus.h"
-
-static ssize_t device_show(struct device *d,
- struct device_attribute *attr, char *buf)
-{
- struct vop_device *dev = dev_to_vop(d);
-
- return sprintf(buf, "0x%04x\n", dev->id.device);
-}
-static DEVICE_ATTR_RO(device);
-
-static ssize_t vendor_show(struct device *d,
- struct device_attribute *attr, char *buf)
-{
- struct vop_device *dev = dev_to_vop(d);
-
- return sprintf(buf, "0x%04x\n", dev->id.vendor);
-}
-static DEVICE_ATTR_RO(vendor);
-
-static ssize_t modalias_show(struct device *d,
- struct device_attribute *attr, char *buf)
-{
- struct vop_device *dev = dev_to_vop(d);
-
- return sprintf(buf, "vop:d%08Xv%08X\n",
- dev->id.device, dev->id.vendor);
-}
-static DEVICE_ATTR_RO(modalias);
-
-static struct attribute *vop_dev_attrs[] = {
- &dev_attr_device.attr,
- &dev_attr_vendor.attr,
- &dev_attr_modalias.attr,
- NULL,
-};
-ATTRIBUTE_GROUPS(vop_dev);
-
-static inline int vop_id_match(const struct vop_device *dev,
- const struct vop_device_id *id)
-{
- if (id->device != dev->id.device && id->device != VOP_DEV_ANY_ID)
- return 0;
-
- return id->vendor == VOP_DEV_ANY_ID || id->vendor == dev->id.vendor;
-}
-
-/*
- * This looks through all the IDs a driver claims to support. If any of them
- * match, we return 1 and the kernel will call vop_dev_probe().
- */
-static int vop_dev_match(struct device *dv, struct device_driver *dr)
-{
- unsigned int i;
- struct vop_device *dev = dev_to_vop(dv);
- const struct vop_device_id *ids;
-
- ids = drv_to_vop(dr)->id_table;
- for (i = 0; ids[i].device; i++)
- if (vop_id_match(dev, &ids[i]))
- return 1;
- return 0;
-}
-
-static int vop_uevent(struct device *dv, struct kobj_uevent_env *env)
-{
- struct vop_device *dev = dev_to_vop(dv);
-
- return add_uevent_var(env, "MODALIAS=vop:d%08Xv%08X",
- dev->id.device, dev->id.vendor);
-}
-
-static int vop_dev_probe(struct device *d)
-{
- struct vop_device *dev = dev_to_vop(d);
- struct vop_driver *drv = drv_to_vop(dev->dev.driver);
-
- return drv->probe(dev);
-}
-
-static int vop_dev_remove(struct device *d)
-{
- struct vop_device *dev = dev_to_vop(d);
- struct vop_driver *drv = drv_to_vop(dev->dev.driver);
-
- drv->remove(dev);
- return 0;
-}
-
-static struct bus_type vop_bus = {
- .name = "vop_bus",
- .match = vop_dev_match,
- .dev_groups = vop_dev_groups,
- .uevent = vop_uevent,
- .probe = vop_dev_probe,
- .remove = vop_dev_remove,
-};
-
-int vop_register_driver(struct vop_driver *driver)
-{
- driver->driver.bus = &vop_bus;
- return driver_register(&driver->driver);
-}
-EXPORT_SYMBOL_GPL(vop_register_driver);
-
-void vop_unregister_driver(struct vop_driver *driver)
-{
- driver_unregister(&driver->driver);
-}
-EXPORT_SYMBOL_GPL(vop_unregister_driver);
-
-static void vop_release_dev(struct device *d)
-{
- struct vop_device *dev = dev_to_vop(d);
-
- kfree(dev);
-}
-
-struct vop_device *
-vop_register_device(struct device *pdev, int id,
- const struct dma_map_ops *dma_ops,
- struct vop_hw_ops *hw_ops, u8 dnode, struct mic_mw *aper,
- struct dma_chan *chan)
-{
- int ret;
- struct vop_device *vdev;
-
- vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
- if (!vdev)
- return ERR_PTR(-ENOMEM);
-
- vdev->dev.parent = pdev;
- vdev->id.device = id;
- vdev->id.vendor = VOP_DEV_ANY_ID;
- vdev->dev.dma_ops = dma_ops;
- vdev->dev.dma_mask = &vdev->dev.coherent_dma_mask;
- dma_set_mask(&vdev->dev, DMA_BIT_MASK(64));
- vdev->dev.release = vop_release_dev;
- vdev->hw_ops = hw_ops;
- vdev->dev.bus = &vop_bus;
- vdev->dnode = dnode;
- vdev->aper = aper;
- vdev->dma_ch = chan;
- vdev->index = dnode - 1;
- dev_set_name(&vdev->dev, "vop-dev%u", vdev->index);
- /*
- * device_register() causes the bus infrastructure to look for a
- * matching driver.
- */
- ret = device_register(&vdev->dev);
- if (ret)
- goto free_vdev;
- return vdev;
-free_vdev:
- put_device(&vdev->dev);
- return ERR_PTR(ret);
-}
-EXPORT_SYMBOL_GPL(vop_register_device);
-
-void vop_unregister_device(struct vop_device *dev)
-{
- device_unregister(&dev->dev);
-}
-EXPORT_SYMBOL_GPL(vop_unregister_device);
-
-static int __init vop_init(void)
-{
- return bus_register(&vop_bus);
-}
-
-static void __exit vop_exit(void)
-{
- bus_unregister(&vop_bus);
-}
-
-core_initcall(vop_init);
-module_exit(vop_exit);
-
-MODULE_AUTHOR("Intel Corporation");
-MODULE_DESCRIPTION("Intel(R) VOP Bus driver");
-MODULE_LICENSE("GPL v2");
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2016 Intel Corporation.
- *
- * Intel Virtio over PCIe Bus driver.
- */
-#ifndef _VOP_BUS_H_
-#define _VOP_BUS_H_
-/*
- * Everything a vop driver needs to work with any particular vop
- * implementation.
- */
-#include <linux/dmaengine.h>
-#include <linux/interrupt.h>
-
-#include "../common/mic_dev.h"
-
-struct vop_device_id {
- u32 device;
- u32 vendor;
-};
-
-#define VOP_DEV_TRNSP 1
-#define VOP_DEV_ANY_ID 0xffffffff
-/*
- * Size of the internal buffer used during DMA's as an intermediate buffer
- * for copy to/from user. Must be an integral number of pages.
- */
-#define VOP_INT_DMA_BUF_SIZE PAGE_ALIGN(64 * 1024ULL)
-
-/**
- * vop_device - representation of a device using vop
- * @hw_ops: the hardware ops supported by this device.
- * @id: the device type identification (used to match it with a driver).
- * @dev: underlying device.
- * @dnode - The destination node which this device will communicate with.
- * @aper: Aperture memory window
- * @dma_ch - DMA channel
- * @index: unique position on the vop bus
- */
-struct vop_device {
- struct vop_hw_ops *hw_ops;
- struct vop_device_id id;
- struct device dev;
- u8 dnode;
- struct mic_mw *aper;
- struct dma_chan *dma_ch;
- int index;
-};
-
-/**
- * vop_driver - operations for a vop I/O driver
- * @driver: underlying device driver (populate name and owner).
- * @id_table: the ids serviced by this driver.
- * @probe: the function to call when a device is found. Returns 0 or -errno.
- * @remove: the function to call when a device is removed.
- */
-struct vop_driver {
- struct device_driver driver;
- const struct vop_device_id *id_table;
- int (*probe)(struct vop_device *dev);
- void (*remove)(struct vop_device *dev);
-};
-
-/**
- * vop_hw_ops - Hardware operations for accessing a VOP device on the VOP bus.
- *
- * @next_db: Obtain the next available doorbell.
- * @request_irq: Request an interrupt on a particular doorbell.
- * @free_irq: Free an interrupt requested previously.
- * @ack_interrupt: acknowledge an interrupt in the ISR.
- * @get_remote_dp: Get access to the virtio device page used by the remote
- * node to add/remove/configure virtio devices.
- * @get_dp: Get access to the virtio device page used by the self
- * node to add/remove/configure virtio devices.
- * @send_intr: Send an interrupt to the peer node on a specified doorbell.
- * @remap: Map a buffer with the specified DMA address and length.
- * @unmap: Unmap a buffer previously mapped.
- * @dma_filter: The DMA filter function to use for obtaining access to
- * a DMA channel on the peer node.
- */
-struct vop_hw_ops {
- int (*next_db)(struct vop_device *vpdev);
- struct mic_irq *(*request_irq)(struct vop_device *vpdev,
- irqreturn_t (*func)(int irq, void *data),
- const char *name, void *data,
- int intr_src);
- void (*free_irq)(struct vop_device *vpdev,
- struct mic_irq *cookie, void *data);
- void (*ack_interrupt)(struct vop_device *vpdev, int num);
- void __iomem * (*get_remote_dp)(struct vop_device *vpdev);
- void * (*get_dp)(struct vop_device *vpdev);
- void (*send_intr)(struct vop_device *vpdev, int db);
- void __iomem * (*remap)(struct vop_device *vpdev,
- dma_addr_t pa, size_t len);
- void (*unmap)(struct vop_device *vpdev, void __iomem *va);
-};
-
-struct vop_device *
-vop_register_device(struct device *pdev, int id,
- const struct dma_map_ops *dma_ops,
- struct vop_hw_ops *hw_ops, u8 dnode, struct mic_mw *aper,
- struct dma_chan *chan);
-void vop_unregister_device(struct vop_device *dev);
-int vop_register_driver(struct vop_driver *drv);
-void vop_unregister_driver(struct vop_driver *drv);
-
-/*
- * module_vop_driver() - Helper macro for drivers that don't do
- * anything special in module init/exit. This eliminates a lot of
- * boilerplate. Each module may only use this macro once, and
- * calling it replaces module_init() and module_exit()
- */
-#define module_vop_driver(__vop_driver) \
- module_driver(__vop_driver, vop_register_driver, \
- vop_unregister_driver)
-
-static inline struct vop_device *dev_to_vop(struct device *dev)
-{
- return container_of(dev, struct vop_device, dev);
-}
-
-static inline struct vop_driver *drv_to_vop(struct device_driver *drv)
-{
- return container_of(drv, struct vop_driver, driver);
-}
-#endif /* _VOP_BUS_H */
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0
-#
-# Makefile - Intel MIC Linux driver.
-# Copyright(c) 2013, Intel Corporation.
-#
-ccflags-y += -DINTEL_MIC_CARD
-
-obj-$(CONFIG_INTEL_MIC_CARD) += mic_card.o
-mic_card-y += mic_x100.o
-mic_card-y += mic_device.o
-mic_card-y += mic_debugfs.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Disclaimer: The codes contained in these modules may be specific to
- * the Intel Software Development Platform codenamed: Knights Ferry, and
- * the Intel product codenamed: Knights Corner, and are not backward
- * compatible with other Intel products. Additionally, Intel will NOT
- * support the codes or instruction set in future products.
- *
- * Intel MIC Card driver.
- */
-#include <linux/debugfs.h>
-#include <linux/delay.h>
-#include <linux/seq_file.h>
-#include <linux/interrupt.h>
-#include <linux/device.h>
-
-#include "../common/mic_dev.h"
-#include "mic_device.h"
-
-/* Debugfs parent dir */
-static struct dentry *mic_dbg;
-
-/*
- * mic_intr_show - Send interrupts to host.
- */
-static int mic_intr_show(struct seq_file *s, void *unused)
-{
- struct mic_driver *mdrv = s->private;
- struct mic_device *mdev = &mdrv->mdev;
-
- mic_send_intr(mdev, 0);
- msleep(1000);
- mic_send_intr(mdev, 1);
- msleep(1000);
- mic_send_intr(mdev, 2);
- msleep(1000);
- mic_send_intr(mdev, 3);
- msleep(1000);
-
- return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(mic_intr);
-
-/*
- * mic_create_card_debug_dir - Initialize MIC debugfs entries.
- */
-void __init mic_create_card_debug_dir(struct mic_driver *mdrv)
-{
- if (!mic_dbg)
- return;
-
- mdrv->dbg_dir = debugfs_create_dir(mdrv->name, mic_dbg);
-
- debugfs_create_file("intr_test", 0444, mdrv->dbg_dir, mdrv,
- &mic_intr_fops);
-}
-
-/*
- * mic_delete_card_debug_dir - Uninitialize MIC debugfs entries.
- */
-void mic_delete_card_debug_dir(struct mic_driver *mdrv)
-{
- debugfs_remove_recursive(mdrv->dbg_dir);
-}
-
-/*
- * mic_init_card_debugfs - Initialize global debugfs entry.
- */
-void __init mic_init_card_debugfs(void)
-{
- mic_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
-}
-
-/*
- * mic_exit_card_debugfs - Uninitialize global debugfs entry
- */
-void mic_exit_card_debugfs(void)
-{
- debugfs_remove(mic_dbg);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Disclaimer: The codes contained in these modules may be specific to
- * the Intel Software Development Platform codenamed: Knights Ferry, and
- * the Intel product codenamed: Knights Corner, and are not backward
- * compatible with other Intel products. Additionally, Intel will NOT
- * support the codes or instruction set in future products.
- *
- * Intel MIC Card driver.
- */
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/interrupt.h>
-#include <linux/reboot.h>
-#include <linux/dmaengine.h>
-#include <linux/kmod.h>
-
-#include <linux/mic_common.h>
-#include "../common/mic_dev.h"
-#include "mic_device.h"
-
-static struct mic_driver *g_drv;
-
-static int __init mic_dp_init(void)
-{
- struct mic_driver *mdrv = g_drv;
- struct mic_device *mdev = &mdrv->mdev;
- struct mic_bootparam __iomem *bootparam;
- u64 lo, hi, dp_dma_addr;
- u32 magic;
-
- lo = mic_read_spad(&mdrv->mdev, MIC_DPLO_SPAD);
- hi = mic_read_spad(&mdrv->mdev, MIC_DPHI_SPAD);
-
- dp_dma_addr = lo | (hi << 32);
- mdrv->dp = mic_card_map(mdev, dp_dma_addr, MIC_DP_SIZE);
- if (!mdrv->dp) {
- dev_err(mdrv->dev, "Cannot remap Aperture BAR\n");
- return -ENOMEM;
- }
- bootparam = mdrv->dp;
- magic = ioread32(&bootparam->magic);
- if (MIC_MAGIC != magic) {
- dev_err(mdrv->dev, "bootparam magic mismatch 0x%x\n", magic);
- return -EIO;
- }
- return 0;
-}
-
-/* Uninitialize the device page */
-static void mic_dp_uninit(void)
-{
- mic_card_unmap(&g_drv->mdev, g_drv->dp);
-}
-
-/**
- * mic_request_card_irq - request an irq.
- *
- * @handler: interrupt handler passed to request_threaded_irq.
- * @thread_fn: thread fn. passed to request_threaded_irq.
- * @name: The ASCII name of the callee requesting the irq.
- * @data: private data that is returned back when calling the
- * function handler.
- * @index: The doorbell index of the requester.
- *
- * returns: The cookie that is transparent to the caller. Passed
- * back when calling mic_free_irq. An appropriate error code
- * is returned on failure. Caller needs to use IS_ERR(return_val)
- * to check for failure and PTR_ERR(return_val) to obtained the
- * error code.
- *
- */
-struct mic_irq *
-mic_request_card_irq(irq_handler_t handler,
- irq_handler_t thread_fn, const char *name,
- void *data, int index)
-{
- int rc = 0;
- unsigned long cookie;
- struct mic_driver *mdrv = g_drv;
-
- rc = request_threaded_irq(mic_db_to_irq(mdrv, index), handler,
- thread_fn, 0, name, data);
- if (rc) {
- dev_err(mdrv->dev, "request_threaded_irq failed rc = %d\n", rc);
- goto err;
- }
- mdrv->irq_info.irq_usage_count[index]++;
- cookie = index;
- return (struct mic_irq *)cookie;
-err:
- return ERR_PTR(rc);
-}
-
-/**
- * mic_free_card_irq - free irq.
- *
- * @cookie: cookie obtained during a successful call to mic_request_threaded_irq
- * @data: private data specified by the calling function during the
- * mic_request_threaded_irq
- *
- * returns: none.
- */
-void mic_free_card_irq(struct mic_irq *cookie, void *data)
-{
- int index;
- struct mic_driver *mdrv = g_drv;
-
- index = (unsigned long)cookie & 0xFFFFU;
- free_irq(mic_db_to_irq(mdrv, index), data);
- mdrv->irq_info.irq_usage_count[index]--;
-}
-
-/**
- * mic_next_card_db - Get the doorbell with minimum usage count.
- *
- * Returns the irq index.
- */
-int mic_next_card_db(void)
-{
- int i;
- int index = 0;
- struct mic_driver *mdrv = g_drv;
-
- for (i = 0; i < mdrv->intr_info.num_intr; i++) {
- if (mdrv->irq_info.irq_usage_count[i] <
- mdrv->irq_info.irq_usage_count[index])
- index = i;
- }
-
- return index;
-}
-
-/**
- * mic_init_irq - Initialize irq information.
- *
- * Returns 0 in success. Appropriate error code on failure.
- */
-static int mic_init_irq(void)
-{
- struct mic_driver *mdrv = g_drv;
-
- mdrv->irq_info.irq_usage_count = kzalloc((sizeof(u32) *
- mdrv->intr_info.num_intr),
- GFP_KERNEL);
- if (!mdrv->irq_info.irq_usage_count)
- return -ENOMEM;
- return 0;
-}
-
-/**
- * mic_uninit_irq - Uninitialize irq information.
- *
- * None.
- */
-static void mic_uninit_irq(void)
-{
- struct mic_driver *mdrv = g_drv;
-
- kfree(mdrv->irq_info.irq_usage_count);
-}
-
-static inline struct mic_driver *scdev_to_mdrv(struct scif_hw_dev *scdev)
-{
- return dev_get_drvdata(scdev->dev.parent);
-}
-
-static struct mic_irq *
-___mic_request_irq(struct scif_hw_dev *scdev,
- irqreturn_t (*func)(int irq, void *data),
- const char *name, void *data,
- int db)
-{
- return mic_request_card_irq(func, NULL, name, data, db);
-}
-
-static void
-___mic_free_irq(struct scif_hw_dev *scdev,
- struct mic_irq *cookie, void *data)
-{
- return mic_free_card_irq(cookie, data);
-}
-
-static void ___mic_ack_interrupt(struct scif_hw_dev *scdev, int num)
-{
- struct mic_driver *mdrv = scdev_to_mdrv(scdev);
-
- mic_ack_interrupt(&mdrv->mdev);
-}
-
-static int ___mic_next_db(struct scif_hw_dev *scdev)
-{
- return mic_next_card_db();
-}
-
-static void ___mic_send_intr(struct scif_hw_dev *scdev, int db)
-{
- struct mic_driver *mdrv = scdev_to_mdrv(scdev);
-
- mic_send_intr(&mdrv->mdev, db);
-}
-
-static void ___mic_send_p2p_intr(struct scif_hw_dev *scdev, int db,
- struct mic_mw *mw)
-{
- mic_send_p2p_intr(db, mw);
-}
-
-static void __iomem *
-___mic_ioremap(struct scif_hw_dev *scdev,
- phys_addr_t pa, size_t len)
-{
- struct mic_driver *mdrv = scdev_to_mdrv(scdev);
-
- return mic_card_map(&mdrv->mdev, pa, len);
-}
-
-static void ___mic_iounmap(struct scif_hw_dev *scdev, void __iomem *va)
-{
- struct mic_driver *mdrv = scdev_to_mdrv(scdev);
-
- mic_card_unmap(&mdrv->mdev, va);
-}
-
-static struct scif_hw_ops scif_hw_ops = {
- .request_irq = ___mic_request_irq,
- .free_irq = ___mic_free_irq,
- .ack_interrupt = ___mic_ack_interrupt,
- .next_db = ___mic_next_db,
- .send_intr = ___mic_send_intr,
- .send_p2p_intr = ___mic_send_p2p_intr,
- .remap = ___mic_ioremap,
- .unmap = ___mic_iounmap,
-};
-
-static inline struct mic_driver *vpdev_to_mdrv(struct vop_device *vpdev)
-{
- return dev_get_drvdata(vpdev->dev.parent);
-}
-
-static struct mic_irq *
-__mic_request_irq(struct vop_device *vpdev,
- irqreturn_t (*func)(int irq, void *data),
- const char *name, void *data, int intr_src)
-{
- return mic_request_card_irq(func, NULL, name, data, intr_src);
-}
-
-static void __mic_free_irq(struct vop_device *vpdev,
- struct mic_irq *cookie, void *data)
-{
- return mic_free_card_irq(cookie, data);
-}
-
-static void __mic_ack_interrupt(struct vop_device *vpdev, int num)
-{
- struct mic_driver *mdrv = vpdev_to_mdrv(vpdev);
-
- mic_ack_interrupt(&mdrv->mdev);
-}
-
-static int __mic_next_db(struct vop_device *vpdev)
-{
- return mic_next_card_db();
-}
-
-static void __iomem *__mic_get_remote_dp(struct vop_device *vpdev)
-{
- struct mic_driver *mdrv = vpdev_to_mdrv(vpdev);
-
- return mdrv->dp;
-}
-
-static void __mic_send_intr(struct vop_device *vpdev, int db)
-{
- struct mic_driver *mdrv = vpdev_to_mdrv(vpdev);
-
- mic_send_intr(&mdrv->mdev, db);
-}
-
-static void __iomem *__mic_ioremap(struct vop_device *vpdev,
- dma_addr_t pa, size_t len)
-{
- struct mic_driver *mdrv = vpdev_to_mdrv(vpdev);
-
- return mic_card_map(&mdrv->mdev, pa, len);
-}
-
-static void __mic_iounmap(struct vop_device *vpdev, void __iomem *va)
-{
- struct mic_driver *mdrv = vpdev_to_mdrv(vpdev);
-
- mic_card_unmap(&mdrv->mdev, va);
-}
-
-static struct vop_hw_ops vop_hw_ops = {
- .request_irq = __mic_request_irq,
- .free_irq = __mic_free_irq,
- .ack_interrupt = __mic_ack_interrupt,
- .next_db = __mic_next_db,
- .get_remote_dp = __mic_get_remote_dp,
- .send_intr = __mic_send_intr,
- .remap = __mic_ioremap,
- .unmap = __mic_iounmap,
-};
-
-static int mic_request_dma_chans(struct mic_driver *mdrv)
-{
- dma_cap_mask_t mask;
- struct dma_chan *chan;
-
- dma_cap_zero(mask);
- dma_cap_set(DMA_MEMCPY, mask);
-
- do {
- chan = dma_request_channel(mask, NULL, NULL);
- if (chan) {
- mdrv->dma_ch[mdrv->num_dma_ch++] = chan;
- if (mdrv->num_dma_ch >= MIC_MAX_DMA_CHAN)
- break;
- }
- } while (chan);
- dev_info(mdrv->dev, "DMA channels # %d\n", mdrv->num_dma_ch);
- return mdrv->num_dma_ch;
-}
-
-static void mic_free_dma_chans(struct mic_driver *mdrv)
-{
- int i = 0;
-
- for (i = 0; i < mdrv->num_dma_ch; i++) {
- dma_release_channel(mdrv->dma_ch[i]);
- mdrv->dma_ch[i] = NULL;
- }
- mdrv->num_dma_ch = 0;
-}
-
-/*
- * mic_driver_init - MIC driver initialization tasks.
- *
- * Returns 0 in success. Appropriate error code on failure.
- */
-int __init mic_driver_init(struct mic_driver *mdrv)
-{
- int rc;
- struct mic_bootparam __iomem *bootparam;
- u8 node_id;
-
- g_drv = mdrv;
- /* Unloading the card module is not supported. */
- if (!try_module_get(mdrv->dev->driver->owner)) {
- rc = -ENODEV;
- goto done;
- }
- rc = mic_dp_init();
- if (rc)
- goto put;
- rc = mic_init_irq();
- if (rc)
- goto dp_uninit;
- if (!mic_request_dma_chans(mdrv)) {
- rc = -ENODEV;
- goto irq_uninit;
- }
- mdrv->vpdev = vop_register_device(mdrv->dev, VOP_DEV_TRNSP,
- NULL, &vop_hw_ops, 0,
- NULL, mdrv->dma_ch[0]);
- if (IS_ERR(mdrv->vpdev)) {
- rc = PTR_ERR(mdrv->vpdev);
- goto dma_free;
- }
- bootparam = mdrv->dp;
- node_id = ioread8(&bootparam->node_id);
- mdrv->scdev = scif_register_device(mdrv->dev, MIC_SCIF_DEV,
- NULL, &scif_hw_ops,
- 0, node_id, &mdrv->mdev.mmio, NULL,
- NULL, mdrv->dp, mdrv->dma_ch,
- mdrv->num_dma_ch, true);
- if (IS_ERR(mdrv->scdev)) {
- rc = PTR_ERR(mdrv->scdev);
- goto vop_remove;
- }
- mic_create_card_debug_dir(mdrv);
-done:
- return rc;
-vop_remove:
- vop_unregister_device(mdrv->vpdev);
-dma_free:
- mic_free_dma_chans(mdrv);
-irq_uninit:
- mic_uninit_irq();
-dp_uninit:
- mic_dp_uninit();
-put:
- module_put(mdrv->dev->driver->owner);
- return rc;
-}
-
-/*
- * mic_driver_uninit - MIC driver uninitialization tasks.
- *
- * Returns None
- */
-void mic_driver_uninit(struct mic_driver *mdrv)
-{
- mic_delete_card_debug_dir(mdrv);
- scif_unregister_device(mdrv->scdev);
- vop_unregister_device(mdrv->vpdev);
- mic_free_dma_chans(mdrv);
- mic_uninit_irq();
- mic_dp_uninit();
- module_put(mdrv->dev->driver->owner);
-}
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Disclaimer: The codes contained in these modules may be specific to
- * the Intel Software Development Platform codenamed: Knights Ferry, and
- * the Intel product codenamed: Knights Corner, and are not backward
- * compatible with other Intel products. Additionally, Intel will NOT
- * support the codes or instruction set in future products.
- *
- * Intel MIC Card driver.
- */
-#ifndef _MIC_CARD_DEVICE_H_
-#define _MIC_CARD_DEVICE_H_
-
-#include <linux/workqueue.h>
-#include <linux/io.h>
-#include <linux/interrupt.h>
-#include <linux/mic_bus.h>
-#include "../bus/scif_bus.h"
-#include "../bus/vop_bus.h"
-
-/**
- * struct mic_intr_info - Contains h/w specific interrupt sources info
- *
- * @num_intr: The number of irqs available
- */
-struct mic_intr_info {
- u32 num_intr;
-};
-
-/**
- * struct mic_irq_info - OS specific irq information
- *
- * @irq_usage_count: usage count array tracking the number of sources
- * assigned for each irq.
- */
-struct mic_irq_info {
- int *irq_usage_count;
-};
-
-/**
- * struct mic_device - MIC device information.
- *
- * @mmio: MMIO bar information.
- */
-struct mic_device {
- struct mic_mw mmio;
-};
-
-/**
- * struct mic_driver - MIC card driver information.
- *
- * @name: Name for MIC driver.
- * @dbg_dir: debugfs directory of this MIC device.
- * @dev: The device backing this MIC.
- * @dp: The pointer to the virtio device page.
- * @mdev: MIC device information for the host.
- * @hotplug_work: Hot plug work for adding/removing virtio devices.
- * @irq_info: The OS specific irq information
- * @intr_info: H/W specific interrupt information.
- * @dma_mbdev: dma device on the MIC virtual bus.
- * @dma_ch - Array of DMA channels
- * @num_dma_ch - Number of DMA channels available
- * @scdev: SCIF device on the SCIF virtual bus.
- * @vpdev: Virtio over PCIe device on the VOP virtual bus.
- */
-struct mic_driver {
- char name[20];
- struct dentry *dbg_dir;
- struct device *dev;
- void __iomem *dp;
- struct mic_device mdev;
- struct work_struct hotplug_work;
- struct mic_irq_info irq_info;
- struct mic_intr_info intr_info;
- struct mbus_device *dma_mbdev;
- struct dma_chan *dma_ch[MIC_MAX_DMA_CHAN];
- int num_dma_ch;
- struct scif_hw_dev *scdev;
- struct vop_device *vpdev;
-};
-
-/**
- * struct mic_irq - opaque pointer used as cookie
- */
-struct mic_irq;
-
-/**
- * mic_mmio_read - read from an MMIO register.
- * @mw: MMIO register base virtual address.
- * @offset: register offset.
- *
- * RETURNS: register value.
- */
-static inline u32 mic_mmio_read(struct mic_mw *mw, u32 offset)
-{
- return ioread32(mw->va + offset);
-}
-
-/**
- * mic_mmio_write - write to an MMIO register.
- * @mw: MMIO register base virtual address.
- * @val: the data value to put into the register
- * @offset: register offset.
- *
- * RETURNS: none.
- */
-static inline void
-mic_mmio_write(struct mic_mw *mw, u32 val, u32 offset)
-{
- iowrite32(val, mw->va + offset);
-}
-
-int mic_driver_init(struct mic_driver *mdrv);
-void mic_driver_uninit(struct mic_driver *mdrv);
-int mic_next_card_db(void);
-struct mic_irq *
-mic_request_card_irq(irq_handler_t handler, irq_handler_t thread_fn,
- const char *name, void *data, int db);
-void mic_free_card_irq(struct mic_irq *cookie, void *data);
-u32 mic_read_spad(struct mic_device *mdev, unsigned int idx);
-void mic_send_intr(struct mic_device *mdev, int doorbell);
-void mic_send_p2p_intr(int doorbell, struct mic_mw *mw);
-int mic_db_to_irq(struct mic_driver *mdrv, int db);
-u32 mic_ack_interrupt(struct mic_device *mdev);
-void mic_hw_intr_init(struct mic_driver *mdrv);
-void __iomem *
-mic_card_map(struct mic_device *mdev, dma_addr_t addr, size_t size);
-void mic_card_unmap(struct mic_device *mdev, void __iomem *addr);
-void __init mic_create_card_debug_dir(struct mic_driver *mdrv);
-void mic_delete_card_debug_dir(struct mic_driver *mdrv);
-void __init mic_init_card_debugfs(void);
-void mic_exit_card_debugfs(void);
-#endif
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Disclaimer: The codes contained in these modules may be specific to
- * the Intel Software Development Platform codenamed: Knights Ferry, and
- * the Intel product codenamed: Knights Corner, and are not backward
- * compatible with other Intel products. Additionally, Intel will NOT
- * support the codes or instruction set in future products.
- *
- * Intel MIC Card driver.
- */
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/platform_device.h>
-
-#include "../common/mic_dev.h"
-#include "mic_device.h"
-#include "mic_x100.h"
-
-static const char mic_driver_name[] = "mic";
-
-static struct mic_driver g_drv;
-
-/**
- * mic_read_spad - read from the scratchpad register
- * @mdev: pointer to mic_device instance
- * @idx: index to scratchpad register, 0 based
- *
- * This function allows reading of the 32bit scratchpad register.
- *
- * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
- */
-u32 mic_read_spad(struct mic_device *mdev, unsigned int idx)
-{
- return mic_mmio_read(&mdev->mmio,
- MIC_X100_SBOX_BASE_ADDRESS +
- MIC_X100_SBOX_SPAD0 + idx * 4);
-}
-
-/**
- * __mic_send_intr - Send interrupt to Host.
- * @mdev: pointer to mic_device instance
- * @doorbell: Doorbell number.
- */
-void mic_send_intr(struct mic_device *mdev, int doorbell)
-{
- struct mic_mw *mw = &mdev->mmio;
-
- if (doorbell > MIC_X100_MAX_DOORBELL_IDX)
- return;
- /* Ensure that the interrupt is ordered w.r.t previous stores. */
- wmb();
- mic_mmio_write(mw, MIC_X100_SBOX_SDBIC0_DBREQ_BIT,
- MIC_X100_SBOX_BASE_ADDRESS +
- (MIC_X100_SBOX_SDBIC0 + (4 * doorbell)));
-}
-
-/*
- * mic_x100_send_sbox_intr - Send an MIC_X100_SBOX interrupt to MIC.
- */
-static void mic_x100_send_sbox_intr(struct mic_mw *mw, int doorbell)
-{
- u64 apic_icr_offset = MIC_X100_SBOX_APICICR0 + doorbell * 8;
- u32 apicicr_low = mic_mmio_read(mw, MIC_X100_SBOX_BASE_ADDRESS +
- apic_icr_offset);
-
- /* for MIC we need to make sure we "hit" the send_icr bit (13) */
- apicicr_low = (apicicr_low | (1 << 13));
- /*
- * Ensure that the interrupt is ordered w.r.t. previous stores
- * to main memory. Fence instructions are not implemented in X100
- * since execution is in order but a compiler barrier is still
- * required.
- */
- wmb();
- mic_mmio_write(mw, apicicr_low,
- MIC_X100_SBOX_BASE_ADDRESS + apic_icr_offset);
-}
-
-static void mic_x100_send_rdmasr_intr(struct mic_mw *mw, int doorbell)
-{
- int rdmasr_offset = MIC_X100_SBOX_RDMASR0 + (doorbell << 2);
- /*
- * Ensure that the interrupt is ordered w.r.t. previous stores
- * to main memory. Fence instructions are not implemented in X100
- * since execution is in order but a compiler barrier is still
- * required.
- */
- wmb();
- mic_mmio_write(mw, 0, MIC_X100_SBOX_BASE_ADDRESS + rdmasr_offset);
-}
-
-/**
- * mic_ack_interrupt - Device specific interrupt handling.
- * @mdev: pointer to mic_device instance
- *
- * Returns: bitmask of doorbell events triggered.
- */
-u32 mic_ack_interrupt(struct mic_device *mdev)
-{
- return 0;
-}
-
-static inline int mic_get_sbox_irq(int db)
-{
- return MIC_X100_IRQ_BASE + db;
-}
-
-static inline int mic_get_rdmasr_irq(int index)
-{
- return MIC_X100_RDMASR_IRQ_BASE + index;
-}
-
-void mic_send_p2p_intr(int db, struct mic_mw *mw)
-{
- int rdmasr_index;
-
- if (db < MIC_X100_NUM_SBOX_IRQ) {
- mic_x100_send_sbox_intr(mw, db);
- } else {
- rdmasr_index = db - MIC_X100_NUM_SBOX_IRQ;
- mic_x100_send_rdmasr_intr(mw, rdmasr_index);
- }
-}
-
-/**
- * mic_hw_intr_init - Initialize h/w specific interrupt
- * information.
- * @mdrv: pointer to mic_driver
- */
-void mic_hw_intr_init(struct mic_driver *mdrv)
-{
- mdrv->intr_info.num_intr = MIC_X100_NUM_SBOX_IRQ +
- MIC_X100_NUM_RDMASR_IRQ;
-}
-
-/**
- * mic_db_to_irq - Retrieve irq number corresponding to a doorbell.
- * @mdrv: pointer to mic_driver
- * @db: The doorbell obtained for which the irq is needed. Doorbell
- * may correspond to an sbox doorbell or an rdmasr index.
- *
- * Returns the irq corresponding to the doorbell.
- */
-int mic_db_to_irq(struct mic_driver *mdrv, int db)
-{
- int rdmasr_index;
-
- /*
- * The total number of doorbell interrupts on the card are 16. Indices
- * 0-8 falls in the SBOX category and 8-15 fall in the RDMASR category.
- */
- if (db < MIC_X100_NUM_SBOX_IRQ) {
- return mic_get_sbox_irq(db);
- } else {
- rdmasr_index = db - MIC_X100_NUM_SBOX_IRQ;
- return mic_get_rdmasr_irq(rdmasr_index);
- }
-}
-
-/*
- * mic_card_map - Allocate virtual address for a remote memory region.
- * @mdev: pointer to mic_device instance.
- * @addr: Remote DMA address.
- * @size: Size of the region.
- *
- * Returns: Virtual address backing the remote memory region.
- */
-void __iomem *
-mic_card_map(struct mic_device *mdev, dma_addr_t addr, size_t size)
-{
- return ioremap(addr, size);
-}
-
-/*
- * mic_card_unmap - Unmap the virtual address for a remote memory region.
- * @mdev: pointer to mic_device instance.
- * @addr: Virtual address for remote memory region.
- *
- * Returns: None.
- */
-void mic_card_unmap(struct mic_device *mdev, void __iomem *addr)
-{
- iounmap(addr);
-}
-
-static inline struct mic_driver *mbdev_to_mdrv(struct mbus_device *mbdev)
-{
- return dev_get_drvdata(mbdev->dev.parent);
-}
-
-static struct mic_irq *
-_mic_request_threaded_irq(struct mbus_device *mbdev,
- irq_handler_t handler, irq_handler_t thread_fn,
- const char *name, void *data, int intr_src)
-{
- int rc = 0;
- unsigned int irq = intr_src;
- unsigned long cookie = irq;
-
- rc = request_threaded_irq(irq, handler, thread_fn, 0, name, data);
- if (rc) {
- dev_err(mbdev_to_mdrv(mbdev)->dev,
- "request_threaded_irq failed rc = %d\n", rc);
- return ERR_PTR(rc);
- }
- return (struct mic_irq *)cookie;
-}
-
-static void _mic_free_irq(struct mbus_device *mbdev,
- struct mic_irq *cookie, void *data)
-{
- unsigned long irq = (unsigned long)cookie;
- free_irq(irq, data);
-}
-
-static void _mic_ack_interrupt(struct mbus_device *mbdev, int num)
-{
- mic_ack_interrupt(&mbdev_to_mdrv(mbdev)->mdev);
-}
-
-static struct mbus_hw_ops mbus_hw_ops = {
- .request_threaded_irq = _mic_request_threaded_irq,
- .free_irq = _mic_free_irq,
- .ack_interrupt = _mic_ack_interrupt,
-};
-
-static int __init mic_probe(struct platform_device *pdev)
-{
- struct mic_driver *mdrv = &g_drv;
- struct mic_device *mdev = &mdrv->mdev;
- int rc = 0;
-
- mdrv->dev = &pdev->dev;
- snprintf(mdrv->name, sizeof(mic_driver_name), mic_driver_name);
-
- /* FIXME: use dma_set_mask_and_coherent() and check result */
- dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
-
- mdev->mmio.pa = MIC_X100_MMIO_BASE;
- mdev->mmio.len = MIC_X100_MMIO_LEN;
- mdev->mmio.va = devm_ioremap(&pdev->dev, MIC_X100_MMIO_BASE,
- MIC_X100_MMIO_LEN);
- if (!mdev->mmio.va) {
- dev_err(&pdev->dev, "Cannot remap MMIO BAR\n");
- rc = -EIO;
- goto done;
- }
- mic_hw_intr_init(mdrv);
- platform_set_drvdata(pdev, mdrv);
- mdrv->dma_mbdev = mbus_register_device(mdrv->dev, MBUS_DEV_DMA_MIC,
- NULL, &mbus_hw_ops, 0,
- mdrv->mdev.mmio.va);
- if (IS_ERR(mdrv->dma_mbdev)) {
- rc = PTR_ERR(mdrv->dma_mbdev);
- dev_err(&pdev->dev, "mbus_add_device failed rc %d\n", rc);
- goto done;
- }
- rc = mic_driver_init(mdrv);
- if (rc) {
- dev_err(&pdev->dev, "mic_driver_init failed rc %d\n", rc);
- goto remove_dma;
- }
-done:
- return rc;
-remove_dma:
- mbus_unregister_device(mdrv->dma_mbdev);
- return rc;
-}
-
-static int mic_remove(struct platform_device *pdev)
-{
- struct mic_driver *mdrv = &g_drv;
-
- mic_driver_uninit(mdrv);
- mbus_unregister_device(mdrv->dma_mbdev);
- return 0;
-}
-
-static void mic_platform_shutdown(struct platform_device *pdev)
-{
- mic_remove(pdev);
-}
-
-static struct platform_driver __refdata mic_platform_driver = {
- .probe = mic_probe,
- .remove = mic_remove,
- .shutdown = mic_platform_shutdown,
- .driver = {
- .name = mic_driver_name,
- },
-};
-
-static struct platform_device *mic_platform_dev;
-
-static int __init mic_init(void)
-{
- int ret;
- struct cpuinfo_x86 *c = &cpu_data(0);
-
- if (!(c->x86 == 11 && c->x86_model == 1)) {
- ret = -ENODEV;
- pr_err("%s not running on X100 ret %d\n", __func__, ret);
- goto done;
- }
-
- request_module("mic_x100_dma");
- mic_init_card_debugfs();
-
- mic_platform_dev = platform_device_register_simple(mic_driver_name,
- 0, NULL, 0);
- ret = PTR_ERR_OR_ZERO(mic_platform_dev);
- if (ret) {
- pr_err("platform_device_register_full ret %d\n", ret);
- goto cleanup_debugfs;
- }
- ret = platform_driver_register(&mic_platform_driver);
- if (ret) {
- pr_err("platform_driver_register ret %d\n", ret);
- goto device_unregister;
- }
- return ret;
-
-device_unregister:
- platform_device_unregister(mic_platform_dev);
-cleanup_debugfs:
- mic_exit_card_debugfs();
-done:
- return ret;
-}
-
-static void __exit mic_exit(void)
-{
- platform_driver_unregister(&mic_platform_driver);
- platform_device_unregister(mic_platform_dev);
- mic_exit_card_debugfs();
-}
-
-module_init(mic_init);
-module_exit(mic_exit);
-
-MODULE_AUTHOR("Intel Corporation");
-MODULE_DESCRIPTION("Intel(R) MIC X100 Card driver");
-MODULE_LICENSE("GPL v2");
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Disclaimer: The codes contained in these modules may be specific to
- * the Intel Software Development Platform codenamed: Knights Ferry, and
- * the Intel product codenamed: Knights Corner, and are not backward
- * compatible with other Intel products. Additionally, Intel will NOT
- * support the codes or instruction set in future products.
- *
- * Intel MIC Card driver.
- */
-#ifndef _MIC_X100_CARD_H_
-#define _MIC_X100_CARD_H_
-
-#define MIC_X100_MMIO_BASE 0x08007C0000ULL
-#define MIC_X100_MMIO_LEN 0x00020000ULL
-#define MIC_X100_SBOX_BASE_ADDRESS 0x00010000ULL
-
-#define MIC_X100_SBOX_SPAD0 0x0000AB20
-#define MIC_X100_SBOX_SDBIC0 0x0000CC90
-#define MIC_X100_SBOX_SDBIC0_DBREQ_BIT 0x80000000
-#define MIC_X100_SBOX_RDMASR0 0x0000B180
-#define MIC_X100_SBOX_APICICR0 0x0000A9D0
-
-#define MIC_X100_MAX_DOORBELL_IDX 8
-
-#define MIC_X100_NUM_SBOX_IRQ 8
-#define MIC_X100_NUM_RDMASR_IRQ 8
-#define MIC_X100_SBOX_IRQ_BASE 0
-#define MIC_X100_RDMASR_IRQ_BASE 17
-
-#define MIC_X100_IRQ_BASE 26
-
-#endif
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Intel MIC driver.
- */
-#ifndef __MIC_DEV_H__
-#define __MIC_DEV_H__
-
-/* The maximum number of MIC devices supported in a single host system. */
-#define MIC_MAX_NUM_DEVS 128
-
-/**
- * enum mic_hw_family - The hardware family to which a device belongs.
- */
-enum mic_hw_family {
- MIC_FAMILY_X100 = 0,
- MIC_FAMILY_X200,
- MIC_FAMILY_UNKNOWN,
- MIC_FAMILY_LAST
-};
-
-/**
- * struct mic_mw - MIC memory window
- *
- * @pa: Base physical address.
- * @va: Base ioremap'd virtual address.
- * @len: Size of the memory window.
- */
-struct mic_mw {
- phys_addr_t pa;
- void __iomem *va;
- resource_size_t len;
-};
-
-/*
- * Scratch pad register offsets used by the host to communicate
- * device page DMA address to the card.
- */
-#define MIC_DPLO_SPAD 14
-#define MIC_DPHI_SPAD 15
-
-/*
- * These values are supposed to be in the config_change field of the
- * device page when the host sends a config change interrupt to the card.
- */
-#define MIC_VIRTIO_PARAM_DEV_REMOVE 0x1
-#define MIC_VIRTIO_PARAM_CONFIG_CHANGED 0x2
-
-/* Maximum number of DMA channels */
-#define MIC_MAX_DMA_CHAN 4
-
-#endif
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0
-#
-# Makefile - Intel MIC Coprocessor State Management (COSM) Driver
-# Copyright(c) 2015, Intel Corporation.
-#
-obj-$(CONFIG_MIC_COSM) += mic_cosm.o
-
-mic_cosm-objs := cosm_main.o
-mic_cosm-objs += cosm_debugfs.o
-mic_cosm-objs += cosm_sysfs.o
-mic_cosm-objs += cosm_scif_server.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2015 Intel Corporation.
- *
- * Intel MIC Coprocessor State Management (COSM) Driver
- */
-
-#include <linux/debugfs.h>
-#include <linux/slab.h>
-#include <linux/io.h>
-#include "cosm_main.h"
-
-/* Debugfs parent dir */
-static struct dentry *cosm_dbg;
-
-/*
- * log_buf_show - Display MIC kernel log buffer
- *
- * log_buf addr/len is read from System.map by user space
- * and populated in sysfs entries.
- */
-static int log_buf_show(struct seq_file *s, void *unused)
-{
- void __iomem *log_buf_va;
- int __iomem *log_buf_len_va;
- struct cosm_device *cdev = s->private;
- void *kva;
- int size;
- u64 aper_offset;
-
- if (!cdev || !cdev->log_buf_addr || !cdev->log_buf_len)
- goto done;
-
- mutex_lock(&cdev->cosm_mutex);
- switch (cdev->state) {
- case MIC_BOOTING:
- case MIC_ONLINE:
- case MIC_SHUTTING_DOWN:
- break;
- default:
- goto unlock;
- }
-
- /*
- * Card kernel will never be relocated and any kernel text/data mapping
- * can be translated to phys address by subtracting __START_KERNEL_map.
- */
- aper_offset = (u64)cdev->log_buf_len - __START_KERNEL_map;
- log_buf_len_va = cdev->hw_ops->aper(cdev)->va + aper_offset;
- aper_offset = (u64)cdev->log_buf_addr - __START_KERNEL_map;
- log_buf_va = cdev->hw_ops->aper(cdev)->va + aper_offset;
-
- size = ioread32(log_buf_len_va);
- kva = kmalloc(size, GFP_KERNEL);
- if (!kva)
- goto unlock;
-
- memcpy_fromio(kva, log_buf_va, size);
- seq_write(s, kva, size);
- kfree(kva);
-unlock:
- mutex_unlock(&cdev->cosm_mutex);
-done:
- return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(log_buf);
-
-/*
- * force_reset_show - Force MIC reset
- *
- * Invokes the force_reset COSM bus op instead of the standard reset
- * op in case a force reset of the MIC device is required
- */
-static int force_reset_show(struct seq_file *s, void *pos)
-{
- struct cosm_device *cdev = s->private;
-
- cosm_stop(cdev, true);
- return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(force_reset);
-
-void cosm_create_debug_dir(struct cosm_device *cdev)
-{
- char name[16];
-
- if (!cosm_dbg)
- return;
-
- scnprintf(name, sizeof(name), "mic%d", cdev->index);
- cdev->dbg_dir = debugfs_create_dir(name, cosm_dbg);
-
- debugfs_create_file("log_buf", 0444, cdev->dbg_dir, cdev,
- &log_buf_fops);
- debugfs_create_file("force_reset", 0444, cdev->dbg_dir, cdev,
- &force_reset_fops);
-}
-
-void cosm_delete_debug_dir(struct cosm_device *cdev)
-{
- debugfs_remove_recursive(cdev->dbg_dir);
-}
-
-void cosm_init_debugfs(void)
-{
- cosm_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
-}
-
-void cosm_exit_debugfs(void)
-{
- debugfs_remove(cosm_dbg);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2015 Intel Corporation.
- *
- * Intel MIC Coprocessor State Management (COSM) Driver
- */
-
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/idr.h>
-#include <linux/slab.h>
-#include <linux/cred.h>
-#include "cosm_main.h"
-
-static const char cosm_driver_name[] = "mic";
-
-/* COSM ID allocator */
-static struct ida g_cosm_ida;
-/* Class of MIC devices for sysfs accessibility. */
-static struct class *g_cosm_class;
-/* Number of MIC devices */
-static atomic_t g_num_dev;
-
-/**
- * cosm_hw_reset - Issue a HW reset for the MIC device
- * @cdev: pointer to cosm_device instance
- * @force: force a MIC to reset even if it is already reset and ready
- */
-static void cosm_hw_reset(struct cosm_device *cdev, bool force)
-{
- int i;
-
-#define MIC_RESET_TO (45)
- if (force && cdev->hw_ops->force_reset)
- cdev->hw_ops->force_reset(cdev);
- else
- cdev->hw_ops->reset(cdev);
-
- for (i = 0; i < MIC_RESET_TO; i++) {
- if (cdev->hw_ops->ready(cdev)) {
- cosm_set_state(cdev, MIC_READY);
- return;
- }
- /*
- * Resets typically take 10s of seconds to complete.
- * Since an MMIO read is required to check if the
- * firmware is ready or not, a 1 second delay works nicely.
- */
- msleep(1000);
- }
- cosm_set_state(cdev, MIC_RESET_FAILED);
-}
-
-/**
- * cosm_start - Start the MIC
- * @cdev: pointer to cosm_device instance
- *
- * This function prepares an MIC for boot and initiates boot.
- * RETURNS: An appropriate -ERRNO error value on error, or 0 for success.
- */
-int cosm_start(struct cosm_device *cdev)
-{
- const struct cred *orig_cred;
- struct cred *override_cred;
- int rc;
-
- mutex_lock(&cdev->cosm_mutex);
- if (!cdev->bootmode) {
- dev_err(&cdev->dev, "%s %d bootmode not set\n",
- __func__, __LINE__);
- rc = -EINVAL;
- goto unlock_ret;
- }
-retry:
- if (cdev->state != MIC_READY) {
- dev_err(&cdev->dev, "%s %d MIC state not READY\n",
- __func__, __LINE__);
- rc = -EINVAL;
- goto unlock_ret;
- }
- if (!cdev->hw_ops->ready(cdev)) {
- cosm_hw_reset(cdev, false);
- /*
- * The state will either be MIC_READY if the reset succeeded
- * or MIC_RESET_FAILED if the firmware reset failed.
- */
- goto retry;
- }
-
- /*
- * Set credentials to root to allow non-root user to download initramsfs
- * with 600 permissions
- */
- override_cred = prepare_creds();
- if (!override_cred) {
- dev_err(&cdev->dev, "%s %d prepare_creds failed\n",
- __func__, __LINE__);
- rc = -ENOMEM;
- goto unlock_ret;
- }
- override_cred->fsuid = GLOBAL_ROOT_UID;
- orig_cred = override_creds(override_cred);
-
- rc = cdev->hw_ops->start(cdev, cdev->index);
-
- revert_creds(orig_cred);
- put_cred(override_cred);
- if (rc)
- goto unlock_ret;
-
- /*
- * If linux is being booted, card is treated 'online' only
- * when the scif interface in the card is up. If anything else
- * is booted, we set card to 'online' immediately.
- */
- if (!strcmp(cdev->bootmode, "linux"))
- cosm_set_state(cdev, MIC_BOOTING);
- else
- cosm_set_state(cdev, MIC_ONLINE);
-unlock_ret:
- mutex_unlock(&cdev->cosm_mutex);
- if (rc)
- dev_err(&cdev->dev, "cosm_start failed rc %d\n", rc);
- return rc;
-}
-
-/**
- * cosm_stop - Prepare the MIC for reset and trigger reset
- * @cdev: pointer to cosm_device instance
- * @force: force a MIC to reset even if it is already reset and ready.
- *
- * RETURNS: None
- */
-void cosm_stop(struct cosm_device *cdev, bool force)
-{
- mutex_lock(&cdev->cosm_mutex);
- if (cdev->state != MIC_READY || force) {
- /*
- * Don't call hw_ops if they have been called previously.
- * stop(..) calls device_unregister and will crash the system if
- * called multiple times.
- */
- u8 state = cdev->state == MIC_RESETTING ?
- cdev->prev_state : cdev->state;
- bool call_hw_ops = state != MIC_RESET_FAILED &&
- state != MIC_READY;
-
- if (cdev->state != MIC_RESETTING)
- cosm_set_state(cdev, MIC_RESETTING);
- cdev->heartbeat_watchdog_enable = false;
- if (call_hw_ops)
- cdev->hw_ops->stop(cdev, force);
- cosm_hw_reset(cdev, force);
- cosm_set_shutdown_status(cdev, MIC_NOP);
- if (call_hw_ops && cdev->hw_ops->post_reset)
- cdev->hw_ops->post_reset(cdev, cdev->state);
- }
- mutex_unlock(&cdev->cosm_mutex);
- flush_work(&cdev->scif_work);
-}
-
-/**
- * cosm_reset_trigger_work - Trigger MIC reset
- * @work: The work structure
- *
- * This work is scheduled whenever the host wants to reset the MIC.
- */
-static void cosm_reset_trigger_work(struct work_struct *work)
-{
- struct cosm_device *cdev = container_of(work, struct cosm_device,
- reset_trigger_work);
- cosm_stop(cdev, false);
-}
-
-/**
- * cosm_reset - Schedule MIC reset
- * @cdev: pointer to cosm_device instance
- *
- * RETURNS: An -EINVAL if the card is already READY or 0 for success.
- */
-int cosm_reset(struct cosm_device *cdev)
-{
- int rc = 0;
-
- mutex_lock(&cdev->cosm_mutex);
- if (cdev->state != MIC_READY) {
- if (cdev->state != MIC_RESETTING) {
- cdev->prev_state = cdev->state;
- cosm_set_state(cdev, MIC_RESETTING);
- schedule_work(&cdev->reset_trigger_work);
- }
- } else {
- dev_err(&cdev->dev, "%s %d MIC is READY\n", __func__, __LINE__);
- rc = -EINVAL;
- }
- mutex_unlock(&cdev->cosm_mutex);
- return rc;
-}
-
-/**
- * cosm_shutdown - Initiate MIC shutdown.
- * @cdev: pointer to cosm_device instance
- *
- * RETURNS: None
- */
-int cosm_shutdown(struct cosm_device *cdev)
-{
- struct cosm_msg msg = { .id = COSM_MSG_SHUTDOWN };
- int rc = 0;
-
- mutex_lock(&cdev->cosm_mutex);
- if (cdev->state != MIC_ONLINE) {
- rc = -EINVAL;
- dev_err(&cdev->dev, "%s %d skipping shutdown in state: %s\n",
- __func__, __LINE__, cosm_state_string[cdev->state]);
- goto err;
- }
-
- if (!cdev->epd) {
- rc = -ENOTCONN;
- dev_err(&cdev->dev, "%s %d scif endpoint not connected rc %d\n",
- __func__, __LINE__, rc);
- goto err;
- }
-
- rc = scif_send(cdev->epd, &msg, sizeof(msg), SCIF_SEND_BLOCK);
- if (rc < 0) {
- dev_err(&cdev->dev, "%s %d scif_send failed rc %d\n",
- __func__, __LINE__, rc);
- goto err;
- }
- cdev->heartbeat_watchdog_enable = false;
- cosm_set_state(cdev, MIC_SHUTTING_DOWN);
- rc = 0;
-err:
- mutex_unlock(&cdev->cosm_mutex);
- return rc;
-}
-
-static int cosm_driver_probe(struct cosm_device *cdev)
-{
- int rc;
-
- /* Initialize SCIF server at first probe */
- if (atomic_add_return(1, &g_num_dev) == 1) {
- rc = cosm_scif_init();
- if (rc)
- goto scif_exit;
- }
- mutex_init(&cdev->cosm_mutex);
- INIT_WORK(&cdev->reset_trigger_work, cosm_reset_trigger_work);
- INIT_WORK(&cdev->scif_work, cosm_scif_work);
- cdev->sysfs_heartbeat_enable = true;
- cosm_sysfs_init(cdev);
- cdev->sdev = device_create_with_groups(g_cosm_class, cdev->dev.parent,
- MKDEV(0, cdev->index), cdev, cdev->attr_group,
- "mic%d", cdev->index);
- if (IS_ERR(cdev->sdev)) {
- rc = PTR_ERR(cdev->sdev);
- dev_err(&cdev->dev, "device_create_with_groups failed rc %d\n",
- rc);
- goto scif_exit;
- }
-
- cdev->state_sysfs = sysfs_get_dirent(cdev->sdev->kobj.sd,
- "state");
- if (!cdev->state_sysfs) {
- rc = -ENODEV;
- dev_err(&cdev->dev, "sysfs_get_dirent failed rc %d\n", rc);
- goto destroy_device;
- }
- cosm_create_debug_dir(cdev);
- return 0;
-destroy_device:
- device_destroy(g_cosm_class, MKDEV(0, cdev->index));
-scif_exit:
- if (atomic_dec_and_test(&g_num_dev))
- cosm_scif_exit();
- return rc;
-}
-
-static void cosm_driver_remove(struct cosm_device *cdev)
-{
- cosm_delete_debug_dir(cdev);
- sysfs_put(cdev->state_sysfs);
- device_destroy(g_cosm_class, MKDEV(0, cdev->index));
- flush_work(&cdev->reset_trigger_work);
- cosm_stop(cdev, false);
- if (atomic_dec_and_test(&g_num_dev))
- cosm_scif_exit();
-
- /* These sysfs entries might have allocated */
- kfree(cdev->cmdline);
- kfree(cdev->firmware);
- kfree(cdev->ramdisk);
- kfree(cdev->bootmode);
-}
-
-static int cosm_suspend(struct device *dev)
-{
- struct cosm_device *cdev = dev_to_cosm(dev);
-
- mutex_lock(&cdev->cosm_mutex);
- switch (cdev->state) {
- /**
- * Suspend/freeze hooks in userspace have already shutdown the card.
- * Card should be 'ready' in most cases. It is however possible that
- * some userspace application initiated a boot. In those cases, we
- * simply reset the card.
- */
- case MIC_ONLINE:
- case MIC_BOOTING:
- case MIC_SHUTTING_DOWN:
- mutex_unlock(&cdev->cosm_mutex);
- cosm_stop(cdev, false);
- break;
- default:
- mutex_unlock(&cdev->cosm_mutex);
- break;
- }
- return 0;
-}
-
-static const struct dev_pm_ops cosm_pm_ops = {
- .suspend = cosm_suspend,
- .freeze = cosm_suspend
-};
-
-static struct cosm_driver cosm_driver = {
- .driver = {
- .name = KBUILD_MODNAME,
- .owner = THIS_MODULE,
- .pm = &cosm_pm_ops,
- },
- .probe = cosm_driver_probe,
- .remove = cosm_driver_remove
-};
-
-static int __init cosm_init(void)
-{
- int ret;
-
- cosm_init_debugfs();
-
- g_cosm_class = class_create(THIS_MODULE, cosm_driver_name);
- if (IS_ERR(g_cosm_class)) {
- ret = PTR_ERR(g_cosm_class);
- pr_err("class_create failed ret %d\n", ret);
- goto cleanup_debugfs;
- }
-
- ida_init(&g_cosm_ida);
- ret = cosm_register_driver(&cosm_driver);
- if (ret) {
- pr_err("cosm_register_driver failed ret %d\n", ret);
- goto ida_destroy;
- }
- return 0;
-ida_destroy:
- ida_destroy(&g_cosm_ida);
- class_destroy(g_cosm_class);
-cleanup_debugfs:
- cosm_exit_debugfs();
- return ret;
-}
-
-static void __exit cosm_exit(void)
-{
- cosm_unregister_driver(&cosm_driver);
- ida_destroy(&g_cosm_ida);
- class_destroy(g_cosm_class);
- cosm_exit_debugfs();
-}
-
-module_init(cosm_init);
-module_exit(cosm_exit);
-
-MODULE_AUTHOR("Intel Corporation");
-MODULE_DESCRIPTION("Intel(R) MIC Coprocessor State Management (COSM) Driver");
-MODULE_LICENSE("GPL v2");
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2015 Intel Corporation.
- *
- * Intel MIC Coprocessor State Management (COSM) Driver
- */
-#ifndef _COSM_COSM_H_
-#define _COSM_COSM_H_
-
-#include <linux/scif.h>
-#include "../bus/cosm_bus.h"
-
-#define COSM_HEARTBEAT_SEND_SEC 30
-#define SCIF_COSM_LISTEN_PORT 201
-
-/**
- * enum COSM msg id's
- * @COSM_MSG_SHUTDOWN: host->card trigger shutdown
- * @COSM_MSG_SYNC_TIME: host->card send host time to card to sync time
- * @COSM_MSG_HEARTBEAT: card->host heartbeat
- * @COSM_MSG_SHUTDOWN_STATUS: card->host with shutdown status as payload
- */
-enum cosm_msg_id {
- COSM_MSG_SHUTDOWN,
- COSM_MSG_SYNC_TIME,
- COSM_MSG_HEARTBEAT,
- COSM_MSG_SHUTDOWN_STATUS,
-};
-
-struct cosm_msg {
- u64 id;
- union {
- u64 shutdown_status;
- struct {
- u64 tv_sec;
- u64 tv_nsec;
- } timespec;
- };
-};
-
-extern const char * const cosm_state_string[];
-extern const char * const cosm_shutdown_status_string[];
-
-void cosm_sysfs_init(struct cosm_device *cdev);
-int cosm_start(struct cosm_device *cdev);
-void cosm_stop(struct cosm_device *cdev, bool force);
-int cosm_reset(struct cosm_device *cdev);
-int cosm_shutdown(struct cosm_device *cdev);
-void cosm_set_state(struct cosm_device *cdev, u8 state);
-void cosm_set_shutdown_status(struct cosm_device *cdev, u8 status);
-void cosm_init_debugfs(void);
-void cosm_exit_debugfs(void);
-void cosm_create_debug_dir(struct cosm_device *cdev);
-void cosm_delete_debug_dir(struct cosm_device *cdev);
-int cosm_scif_init(void);
-void cosm_scif_exit(void);
-void cosm_scif_work(struct work_struct *work);
-
-#endif
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2015 Intel Corporation.
- *
- * Intel MIC Coprocessor State Management (COSM) Driver
- */
-#include <linux/kthread.h>
-#include <linux/sched/signal.h>
-
-#include "cosm_main.h"
-
-/*
- * The COSM driver uses SCIF to communicate between the management node and the
- * MIC cards. SCIF is used to (a) Send a shutdown command to the card (b)
- * receive a shutdown status back from the card upon completion of shutdown and
- * (c) receive periodic heartbeat messages from the card used to deduce if the
- * card has crashed.
- *
- * A COSM server consisting of a SCIF listening endpoint waits for incoming
- * connections from the card. Upon acceptance of the connection, a separate
- * work-item is scheduled to handle SCIF message processing for that card. The
- * life-time of this work-item is therefore the time from which the connection
- * from a card is accepted to the time at which the connection is closed. A new
- * work-item starts each time the card boots and is alive till the card (a)
- * shuts down (b) is reset (c) crashes (d) cosm_client driver on the card is
- * unloaded.
- *
- * From the point of view of COSM interactions with SCIF during card
- * shutdown, reset and crash are as follows:
- *
- * Card shutdown
- * -------------
- * 1. COSM client on the card invokes orderly_poweroff() in response to SHUTDOWN
- * message from the host.
- * 2. Card driver shutdown callback invokes scif_unregister_device(..) resulting
- * in scif_remove(..) getting called on the card
- * 3. scif_remove -> scif_stop -> scif_handle_remove_node ->
- * scif_peer_unregister_device -> device_unregister for the host peer device
- * 4. During device_unregister remove(..) method of cosm_client is invoked which
- * closes the COSM SCIF endpoint on the card. This results in a SCIF_DISCNCT
- * message being sent to host SCIF. SCIF_DISCNCT message processing on the
- * host SCIF sets the host COSM SCIF endpoint state to DISCONNECTED and wakes
- * up the host COSM thread blocked in scif_poll(..) resulting in
- * scif_poll(..) returning EPOLLHUP.
- * 5. On the card, scif_peer_release_dev is next called which results in an
- * SCIF_EXIT message being sent to the host and after receiving the
- * SCIF_EXIT_ACK from the host the peer device teardown on the card is
- * complete.
- * 6. As part of the SCIF_EXIT message processing on the host, host sends a
- * SCIF_REMOVE_NODE to itself corresponding to the card being removed. This
- * starts a similar SCIF peer device teardown sequence on the host
- * corresponding to the card being shut down.
- *
- * Card reset
- * ----------
- * The case of interest here is when the card has not been previously shut down
- * since most of the steps below are skipped in that case:
-
- * 1. cosm_stop(..) invokes hw_ops->stop(..) method of the base PCIe driver
- * which unregisters the SCIF HW device resulting in scif_remove(..) being
- * called on the host.
- * 2. scif_remove(..) calls scif_disconnect_node(..) which results in a
- * SCIF_EXIT message being sent to the card.
- * 3. The card executes scif_stop() as part of SCIF_EXIT message
- * processing. This results in the COSM endpoint on the card being closed and
- * the SCIF host peer device on the card getting unregistered similar to
- * steps 3, 4 and 5 for the card shutdown case above. scif_poll(..) on the
- * host returns EPOLLHUP as a result.
- * 4. On the host, card peer device unregister and SCIF HW remove(..) also
- * subsequently complete.
- *
- * Card crash
- * ----------
- * If a reset is issued after the card has crashed, there is no SCIF_DISCNT
- * message from the card which would result in scif_poll(..) returning
- * EPOLLHUP. In this case when the host SCIF driver sends a SCIF_REMOVE_NODE
- * message to itself resulting in the card SCIF peer device being unregistered,
- * this results in a scif_peer_release_dev -> scif_cleanup_scifdev->
- * scif_invalidate_ep call sequence which sets the endpoint state to
- * DISCONNECTED and results in scif_poll(..) returning EPOLLHUP.
- */
-
-#define COSM_SCIF_BACKLOG 16
-#define COSM_HEARTBEAT_CHECK_DELTA_SEC 10
-#define COSM_HEARTBEAT_TIMEOUT_SEC \
- (COSM_HEARTBEAT_SEND_SEC + COSM_HEARTBEAT_CHECK_DELTA_SEC)
-#define COSM_HEARTBEAT_TIMEOUT_MSEC (COSM_HEARTBEAT_TIMEOUT_SEC * MSEC_PER_SEC)
-
-static struct task_struct *server_thread;
-static scif_epd_t listen_epd;
-
-/* Publish MIC card's shutdown status to user space MIC daemon */
-static void cosm_update_mic_status(struct cosm_device *cdev)
-{
- if (cdev->shutdown_status_int != MIC_NOP) {
- cosm_set_shutdown_status(cdev, cdev->shutdown_status_int);
- cdev->shutdown_status_int = MIC_NOP;
- }
-}
-
-/* Store MIC card's shutdown status internally when it is received */
-static void cosm_shutdown_status_int(struct cosm_device *cdev,
- enum mic_status shutdown_status)
-{
- switch (shutdown_status) {
- case MIC_HALTED:
- case MIC_POWER_OFF:
- case MIC_RESTART:
- case MIC_CRASHED:
- break;
- default:
- dev_err(&cdev->dev, "%s %d Unexpected shutdown_status %d\n",
- __func__, __LINE__, shutdown_status);
- return;
- };
- cdev->shutdown_status_int = shutdown_status;
- cdev->heartbeat_watchdog_enable = false;
-
- if (cdev->state != MIC_SHUTTING_DOWN)
- cosm_set_state(cdev, MIC_SHUTTING_DOWN);
-}
-
-/* Non-blocking recv. Read and process all available messages */
-static void cosm_scif_recv(struct cosm_device *cdev)
-{
- struct cosm_msg msg;
- int rc;
-
- while (1) {
- rc = scif_recv(cdev->epd, &msg, sizeof(msg), 0);
- if (!rc) {
- break;
- } else if (rc < 0) {
- dev_dbg(&cdev->dev, "%s: %d rc %d\n",
- __func__, __LINE__, rc);
- break;
- }
- dev_dbg(&cdev->dev, "%s: %d rc %d id 0x%llx\n",
- __func__, __LINE__, rc, msg.id);
-
- switch (msg.id) {
- case COSM_MSG_SHUTDOWN_STATUS:
- cosm_shutdown_status_int(cdev, msg.shutdown_status);
- break;
- case COSM_MSG_HEARTBEAT:
- /* Nothing to do, heartbeat only unblocks scif_poll */
- break;
- default:
- dev_err(&cdev->dev, "%s: %d unknown msg.id %lld\n",
- __func__, __LINE__, msg.id);
- break;
- }
- }
-}
-
-/* Publish crashed status for this MIC card */
-static void cosm_set_crashed(struct cosm_device *cdev)
-{
- dev_err(&cdev->dev, "node alive timeout\n");
- cosm_shutdown_status_int(cdev, MIC_CRASHED);
- cosm_update_mic_status(cdev);
-}
-
-/* Send host time to the MIC card to sync system time between host and MIC */
-static void cosm_send_time(struct cosm_device *cdev)
-{
- struct cosm_msg msg = { .id = COSM_MSG_SYNC_TIME };
- struct timespec64 ts;
- int rc;
-
- ktime_get_real_ts64(&ts);
- msg.timespec.tv_sec = ts.tv_sec;
- msg.timespec.tv_nsec = ts.tv_nsec;
-
- rc = scif_send(cdev->epd, &msg, sizeof(msg), SCIF_SEND_BLOCK);
- if (rc < 0)
- dev_err(&cdev->dev, "%s %d scif_send failed rc %d\n",
- __func__, __LINE__, rc);
-}
-
-/*
- * Close this cosm_device's endpoint after its peer endpoint on the card has
- * been closed. In all cases except MIC card crash EPOLLHUP on the host is
- * triggered by the client's endpoint being closed.
- */
-static void cosm_scif_close(struct cosm_device *cdev)
-{
- /*
- * Because SHUTDOWN_STATUS message is sent by the MIC cards in the
- * reboot notifier when shutdown is still not complete, we notify mpssd
- * to reset the card when SCIF endpoint is closed.
- */
- cosm_update_mic_status(cdev);
- scif_close(cdev->epd);
- cdev->epd = NULL;
- dev_dbg(&cdev->dev, "%s %d\n", __func__, __LINE__);
-}
-
-/*
- * Set card state to ONLINE when a new SCIF connection from a MIC card is
- * received. Normally the state is BOOTING when the connection comes in, but can
- * be ONLINE if cosm_client driver on the card was unloaded and then reloaded.
- */
-static int cosm_set_online(struct cosm_device *cdev)
-{
- int rc = 0;
-
- if (MIC_BOOTING == cdev->state || MIC_ONLINE == cdev->state) {
- cdev->heartbeat_watchdog_enable = cdev->sysfs_heartbeat_enable;
- cdev->epd = cdev->newepd;
- if (cdev->state == MIC_BOOTING)
- cosm_set_state(cdev, MIC_ONLINE);
- cosm_send_time(cdev);
- dev_dbg(&cdev->dev, "%s %d\n", __func__, __LINE__);
- } else {
- dev_warn(&cdev->dev, "%s %d not going online in state: %s\n",
- __func__, __LINE__, cosm_state_string[cdev->state]);
- rc = -EINVAL;
- }
- /* Drop reference acquired by bus_find_device in the server thread */
- put_device(&cdev->dev);
- return rc;
-}
-
-/*
- * Work function for handling work for a SCIF connection from a particular MIC
- * card. It first sets the card state to ONLINE and then calls scif_poll to
- * block on activity such as incoming messages on the SCIF endpoint. When the
- * endpoint is closed, the work function exits, completing its life cycle, from
- * MIC card boot to card shutdown/reset/crash.
- */
-void cosm_scif_work(struct work_struct *work)
-{
- struct cosm_device *cdev = container_of(work, struct cosm_device,
- scif_work);
- struct scif_pollepd pollepd;
- int rc;
-
- mutex_lock(&cdev->cosm_mutex);
- if (cosm_set_online(cdev))
- goto exit;
-
- while (1) {
- pollepd.epd = cdev->epd;
- pollepd.events = EPOLLIN;
-
- /* Drop the mutex before blocking in scif_poll(..) */
- mutex_unlock(&cdev->cosm_mutex);
- /* poll(..) with timeout on our endpoint */
- rc = scif_poll(&pollepd, 1, COSM_HEARTBEAT_TIMEOUT_MSEC);
- mutex_lock(&cdev->cosm_mutex);
- if (rc < 0) {
- dev_err(&cdev->dev, "%s %d scif_poll rc %d\n",
- __func__, __LINE__, rc);
- continue;
- }
-
- /* There is a message from the card */
- if (pollepd.revents & EPOLLIN)
- cosm_scif_recv(cdev);
-
- /* The peer endpoint is closed or this endpoint disconnected */
- if (pollepd.revents & EPOLLHUP) {
- cosm_scif_close(cdev);
- break;
- }
-
- /* Did we timeout from poll? */
- if (!rc && cdev->heartbeat_watchdog_enable)
- cosm_set_crashed(cdev);
- }
-exit:
- dev_dbg(&cdev->dev, "%s %d exiting\n", __func__, __LINE__);
- mutex_unlock(&cdev->cosm_mutex);
-}
-
-/*
- * COSM SCIF server thread function. Accepts incoming SCIF connections from MIC
- * cards, finds the correct cosm_device to associate that connection with and
- * schedules individual work items for each MIC card.
- */
-static int cosm_scif_server(void *unused)
-{
- struct cosm_device *cdev;
- scif_epd_t newepd;
- struct scif_port_id port_id;
- int rc;
-
- allow_signal(SIGKILL);
-
- while (!kthread_should_stop()) {
- rc = scif_accept(listen_epd, &port_id, &newepd,
- SCIF_ACCEPT_SYNC);
- if (rc < 0) {
- if (-ERESTARTSYS != rc)
- pr_err("%s %d rc %d\n", __func__, __LINE__, rc);
- continue;
- }
-
- /*
- * Associate the incoming connection with a particular
- * cosm_device, COSM device ID == SCIF node ID - 1
- */
- cdev = cosm_find_cdev_by_id(port_id.node - 1);
- if (!cdev)
- continue;
- cdev->newepd = newepd;
- schedule_work(&cdev->scif_work);
- }
-
- pr_debug("%s %d Server thread stopped\n", __func__, __LINE__);
- return 0;
-}
-
-static int cosm_scif_listen(void)
-{
- int rc;
-
- listen_epd = scif_open();
- if (!listen_epd) {
- pr_err("%s %d scif_open failed\n", __func__, __LINE__);
- return -ENOMEM;
- }
-
- rc = scif_bind(listen_epd, SCIF_COSM_LISTEN_PORT);
- if (rc < 0) {
- pr_err("%s %d scif_bind failed rc %d\n",
- __func__, __LINE__, rc);
- goto err;
- }
-
- rc = scif_listen(listen_epd, COSM_SCIF_BACKLOG);
- if (rc < 0) {
- pr_err("%s %d scif_listen rc %d\n", __func__, __LINE__, rc);
- goto err;
- }
- pr_debug("%s %d listen_epd set up\n", __func__, __LINE__);
- return 0;
-err:
- scif_close(listen_epd);
- listen_epd = NULL;
- return rc;
-}
-
-static void cosm_scif_listen_exit(void)
-{
- pr_debug("%s %d closing listen_epd\n", __func__, __LINE__);
- if (listen_epd) {
- scif_close(listen_epd);
- listen_epd = NULL;
- }
-}
-
-/*
- * Create a listening SCIF endpoint and a server kthread which accepts incoming
- * SCIF connections from MIC cards
- */
-int cosm_scif_init(void)
-{
- int rc = cosm_scif_listen();
-
- if (rc) {
- pr_err("%s %d cosm_scif_listen rc %d\n",
- __func__, __LINE__, rc);
- goto err;
- }
-
- server_thread = kthread_run(cosm_scif_server, NULL, "cosm_server");
- if (IS_ERR(server_thread)) {
- rc = PTR_ERR(server_thread);
- pr_err("%s %d kthread_run rc %d\n", __func__, __LINE__, rc);
- goto listen_exit;
- }
- return 0;
-listen_exit:
- cosm_scif_listen_exit();
-err:
- return rc;
-}
-
-/* Stop the running server thread and close the listening SCIF endpoint */
-void cosm_scif_exit(void)
-{
- int rc;
-
- if (!IS_ERR_OR_NULL(server_thread)) {
- rc = send_sig(SIGKILL, server_thread, 0);
- if (rc) {
- pr_err("%s %d send_sig rc %d\n",
- __func__, __LINE__, rc);
- return;
- }
- kthread_stop(server_thread);
- }
-
- cosm_scif_listen_exit();
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2015 Intel Corporation.
- *
- * Intel MIC Coprocessor State Management (COSM) Driver
- */
-#include <linux/slab.h>
-#include "cosm_main.h"
-
-/*
- * A state-to-string lookup table, for exposing a human readable state
- * via sysfs. Always keep in sync with enum cosm_states
- */
-const char * const cosm_state_string[] = {
- [MIC_READY] = "ready",
- [MIC_BOOTING] = "booting",
- [MIC_ONLINE] = "online",
- [MIC_SHUTTING_DOWN] = "shutting_down",
- [MIC_RESETTING] = "resetting",
- [MIC_RESET_FAILED] = "reset_failed",
-};
-
-/*
- * A shutdown-status-to-string lookup table, for exposing a human
- * readable state via sysfs. Always keep in sync with enum cosm_shutdown_status
- */
-const char * const cosm_shutdown_status_string[] = {
- [MIC_NOP] = "nop",
- [MIC_CRASHED] = "crashed",
- [MIC_HALTED] = "halted",
- [MIC_POWER_OFF] = "poweroff",
- [MIC_RESTART] = "restart",
-};
-
-void cosm_set_shutdown_status(struct cosm_device *cdev, u8 shutdown_status)
-{
- dev_dbg(&cdev->dev, "Shutdown Status %s -> %s\n",
- cosm_shutdown_status_string[cdev->shutdown_status],
- cosm_shutdown_status_string[shutdown_status]);
- cdev->shutdown_status = shutdown_status;
-}
-
-void cosm_set_state(struct cosm_device *cdev, u8 state)
-{
- dev_dbg(&cdev->dev, "State %s -> %s\n",
- cosm_state_string[cdev->state],
- cosm_state_string[state]);
- cdev->state = state;
- sysfs_notify_dirent(cdev->state_sysfs);
-}
-
-static ssize_t
-family_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
-
- if (!cdev)
- return -EINVAL;
-
- return cdev->hw_ops->family(cdev, buf);
-}
-static DEVICE_ATTR_RO(family);
-
-static ssize_t
-stepping_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
-
- if (!cdev)
- return -EINVAL;
-
- return cdev->hw_ops->stepping(cdev, buf);
-}
-static DEVICE_ATTR_RO(stepping);
-
-static ssize_t
-state_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
-
- if (!cdev || cdev->state >= MIC_LAST)
- return -EINVAL;
-
- return scnprintf(buf, PAGE_SIZE, "%s\n",
- cosm_state_string[cdev->state]);
-}
-
-static ssize_t
-state_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
- int rc;
-
- if (!cdev)
- return -EINVAL;
-
- if (sysfs_streq(buf, "boot")) {
- rc = cosm_start(cdev);
- goto done;
- }
- if (sysfs_streq(buf, "reset")) {
- rc = cosm_reset(cdev);
- goto done;
- }
-
- if (sysfs_streq(buf, "shutdown")) {
- rc = cosm_shutdown(cdev);
- goto done;
- }
- rc = -EINVAL;
-done:
- if (rc)
- count = rc;
- return count;
-}
-static DEVICE_ATTR_RW(state);
-
-static ssize_t shutdown_status_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
-
- if (!cdev || cdev->shutdown_status >= MIC_STATUS_LAST)
- return -EINVAL;
-
- return scnprintf(buf, PAGE_SIZE, "%s\n",
- cosm_shutdown_status_string[cdev->shutdown_status]);
-}
-static DEVICE_ATTR_RO(shutdown_status);
-
-static ssize_t
-heartbeat_enable_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
-
- if (!cdev)
- return -EINVAL;
-
- return scnprintf(buf, PAGE_SIZE, "%d\n", cdev->sysfs_heartbeat_enable);
-}
-
-static ssize_t
-heartbeat_enable_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
- int enable;
- int ret;
-
- if (!cdev)
- return -EINVAL;
-
- mutex_lock(&cdev->cosm_mutex);
- ret = kstrtoint(buf, 10, &enable);
- if (ret)
- goto unlock;
-
- cdev->sysfs_heartbeat_enable = enable;
- /* if state is not online, cdev->heartbeat_watchdog_enable is 0 */
- if (cdev->state == MIC_ONLINE)
- cdev->heartbeat_watchdog_enable = enable;
- ret = count;
-unlock:
- mutex_unlock(&cdev->cosm_mutex);
- return ret;
-}
-static DEVICE_ATTR_RW(heartbeat_enable);
-
-static ssize_t
-cmdline_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
- char *cmdline;
-
- if (!cdev)
- return -EINVAL;
-
- cmdline = cdev->cmdline;
-
- if (cmdline)
- return scnprintf(buf, PAGE_SIZE, "%s\n", cmdline);
- return 0;
-}
-
-static ssize_t
-cmdline_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
-
- if (!cdev)
- return -EINVAL;
-
- mutex_lock(&cdev->cosm_mutex);
- kfree(cdev->cmdline);
-
- cdev->cmdline = kmalloc(count + 1, GFP_KERNEL);
- if (!cdev->cmdline) {
- count = -ENOMEM;
- goto unlock;
- }
-
- strncpy(cdev->cmdline, buf, count);
-
- if (cdev->cmdline[count - 1] == '\n')
- cdev->cmdline[count - 1] = '\0';
- else
- cdev->cmdline[count] = '\0';
-unlock:
- mutex_unlock(&cdev->cosm_mutex);
- return count;
-}
-static DEVICE_ATTR_RW(cmdline);
-
-static ssize_t
-firmware_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
- char *firmware;
-
- if (!cdev)
- return -EINVAL;
-
- firmware = cdev->firmware;
-
- if (firmware)
- return scnprintf(buf, PAGE_SIZE, "%s\n", firmware);
- return 0;
-}
-
-static ssize_t
-firmware_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
-
- if (!cdev)
- return -EINVAL;
-
- mutex_lock(&cdev->cosm_mutex);
- kfree(cdev->firmware);
-
- cdev->firmware = kmalloc(count + 1, GFP_KERNEL);
- if (!cdev->firmware) {
- count = -ENOMEM;
- goto unlock;
- }
- strncpy(cdev->firmware, buf, count);
-
- if (cdev->firmware[count - 1] == '\n')
- cdev->firmware[count - 1] = '\0';
- else
- cdev->firmware[count] = '\0';
-unlock:
- mutex_unlock(&cdev->cosm_mutex);
- return count;
-}
-static DEVICE_ATTR_RW(firmware);
-
-static ssize_t
-ramdisk_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
- char *ramdisk;
-
- if (!cdev)
- return -EINVAL;
-
- ramdisk = cdev->ramdisk;
-
- if (ramdisk)
- return scnprintf(buf, PAGE_SIZE, "%s\n", ramdisk);
- return 0;
-}
-
-static ssize_t
-ramdisk_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
-
- if (!cdev)
- return -EINVAL;
-
- mutex_lock(&cdev->cosm_mutex);
- kfree(cdev->ramdisk);
-
- cdev->ramdisk = kmalloc(count + 1, GFP_KERNEL);
- if (!cdev->ramdisk) {
- count = -ENOMEM;
- goto unlock;
- }
-
- strncpy(cdev->ramdisk, buf, count);
-
- if (cdev->ramdisk[count - 1] == '\n')
- cdev->ramdisk[count - 1] = '\0';
- else
- cdev->ramdisk[count] = '\0';
-unlock:
- mutex_unlock(&cdev->cosm_mutex);
- return count;
-}
-static DEVICE_ATTR_RW(ramdisk);
-
-static ssize_t
-bootmode_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
- char *bootmode;
-
- if (!cdev)
- return -EINVAL;
-
- bootmode = cdev->bootmode;
-
- if (bootmode)
- return scnprintf(buf, PAGE_SIZE, "%s\n", bootmode);
- return 0;
-}
-
-static ssize_t
-bootmode_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
-
- if (!cdev)
- return -EINVAL;
-
- if (!sysfs_streq(buf, "linux") && !sysfs_streq(buf, "flash"))
- return -EINVAL;
-
- mutex_lock(&cdev->cosm_mutex);
- kfree(cdev->bootmode);
-
- cdev->bootmode = kmalloc(count + 1, GFP_KERNEL);
- if (!cdev->bootmode) {
- count = -ENOMEM;
- goto unlock;
- }
-
- strncpy(cdev->bootmode, buf, count);
-
- if (cdev->bootmode[count - 1] == '\n')
- cdev->bootmode[count - 1] = '\0';
- else
- cdev->bootmode[count] = '\0';
-unlock:
- mutex_unlock(&cdev->cosm_mutex);
- return count;
-}
-static DEVICE_ATTR_RW(bootmode);
-
-static ssize_t
-log_buf_addr_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
-
- if (!cdev)
- return -EINVAL;
-
- return scnprintf(buf, PAGE_SIZE, "%p\n", cdev->log_buf_addr);
-}
-
-static ssize_t
-log_buf_addr_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
- int ret;
- unsigned long addr;
-
- if (!cdev)
- return -EINVAL;
-
- ret = kstrtoul(buf, 16, &addr);
- if (ret)
- goto exit;
-
- cdev->log_buf_addr = (void *)addr;
- ret = count;
-exit:
- return ret;
-}
-static DEVICE_ATTR_RW(log_buf_addr);
-
-static ssize_t
-log_buf_len_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
-
- if (!cdev)
- return -EINVAL;
-
- return scnprintf(buf, PAGE_SIZE, "%p\n", cdev->log_buf_len);
-}
-
-static ssize_t
-log_buf_len_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct cosm_device *cdev = dev_get_drvdata(dev);
- int ret;
- unsigned long addr;
-
- if (!cdev)
- return -EINVAL;
-
- ret = kstrtoul(buf, 16, &addr);
- if (ret)
- goto exit;
-
- cdev->log_buf_len = (int *)addr;
- ret = count;
-exit:
- return ret;
-}
-static DEVICE_ATTR_RW(log_buf_len);
-
-static struct attribute *cosm_default_attrs[] = {
- &dev_attr_family.attr,
- &dev_attr_stepping.attr,
- &dev_attr_state.attr,
- &dev_attr_shutdown_status.attr,
- &dev_attr_heartbeat_enable.attr,
- &dev_attr_cmdline.attr,
- &dev_attr_firmware.attr,
- &dev_attr_ramdisk.attr,
- &dev_attr_bootmode.attr,
- &dev_attr_log_buf_addr.attr,
- &dev_attr_log_buf_len.attr,
-
- NULL
-};
-
-ATTRIBUTE_GROUPS(cosm_default);
-
-void cosm_sysfs_init(struct cosm_device *cdev)
-{
- cdev->attr_group = cosm_default_groups;
-}
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Makefile - Intel MIC COSM Client Driver
-# Copyright(c) 2015, Intel Corporation.
-#
-obj-$(CONFIG_MIC_COSM) += cosm_client.o
-
-cosm_client-objs += cosm_scif_client.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2015 Intel Corporation.
- *
- * Intel MIC COSM Client Driver
- */
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/reboot.h>
-#include <linux/kthread.h>
-#include <linux/sched/signal.h>
-
-#include "../cosm/cosm_main.h"
-
-#define COSM_SCIF_MAX_RETRIES 10
-#define COSM_HEARTBEAT_SEND_MSEC (COSM_HEARTBEAT_SEND_SEC * MSEC_PER_SEC)
-
-static struct task_struct *client_thread;
-static scif_epd_t client_epd;
-static struct scif_peer_dev *client_spdev;
-
-/*
- * Reboot notifier: receives shutdown status from the OS and communicates it
- * back to the COSM process on the host
- */
-static int cosm_reboot_event(struct notifier_block *this, unsigned long event,
- void *ptr)
-{
- struct cosm_msg msg = { .id = COSM_MSG_SHUTDOWN_STATUS };
- int rc;
-
- event = (event == SYS_RESTART) ? SYSTEM_RESTART : event;
- dev_info(&client_spdev->dev, "%s %d received event %ld\n",
- __func__, __LINE__, event);
-
- msg.shutdown_status = event;
- rc = scif_send(client_epd, &msg, sizeof(msg), SCIF_SEND_BLOCK);
- if (rc < 0)
- dev_err(&client_spdev->dev, "%s %d scif_send rc %d\n",
- __func__, __LINE__, rc);
-
- return NOTIFY_DONE;
-}
-
-static struct notifier_block cosm_reboot = {
- .notifier_call = cosm_reboot_event,
-};
-
-/* Set system time from timespec value received from the host */
-static void cosm_set_time(struct cosm_msg *msg)
-{
- struct timespec64 ts = {
- .tv_sec = msg->timespec.tv_sec,
- .tv_nsec = msg->timespec.tv_nsec,
- };
- int rc = do_settimeofday64(&ts);
-
- if (rc)
- dev_err(&client_spdev->dev, "%s: %d settimeofday rc %d\n",
- __func__, __LINE__, rc);
-}
-
-/* COSM client receive message processing */
-static void cosm_client_recv(void)
-{
- struct cosm_msg msg;
- int rc;
-
- while (1) {
- rc = scif_recv(client_epd, &msg, sizeof(msg), 0);
- if (!rc) {
- return;
- } else if (rc < 0) {
- dev_err(&client_spdev->dev, "%s: %d rc %d\n",
- __func__, __LINE__, rc);
- return;
- }
-
- dev_dbg(&client_spdev->dev, "%s: %d rc %d id 0x%llx\n",
- __func__, __LINE__, rc, msg.id);
-
- switch (msg.id) {
- case COSM_MSG_SYNC_TIME:
- cosm_set_time(&msg);
- break;
- case COSM_MSG_SHUTDOWN:
- orderly_poweroff(true);
- break;
- default:
- dev_err(&client_spdev->dev, "%s: %d unknown id %lld\n",
- __func__, __LINE__, msg.id);
- break;
- }
- }
-}
-
-/* Initiate connection to the COSM server on the host */
-static int cosm_scif_connect(void)
-{
- struct scif_port_id port_id;
- int i, rc;
-
- client_epd = scif_open();
- if (!client_epd) {
- dev_err(&client_spdev->dev, "%s %d scif_open failed\n",
- __func__, __LINE__);
- return -ENOMEM;
- }
-
- port_id.node = 0;
- port_id.port = SCIF_COSM_LISTEN_PORT;
-
- for (i = 0; i < COSM_SCIF_MAX_RETRIES; i++) {
- rc = scif_connect(client_epd, &port_id);
- if (rc < 0)
- msleep(1000);
- else
- break;
- }
-
- if (rc < 0) {
- dev_err(&client_spdev->dev, "%s %d scif_connect rc %d\n",
- __func__, __LINE__, rc);
- scif_close(client_epd);
- client_epd = NULL;
- }
- return rc < 0 ? rc : 0;
-}
-
-/* Close host SCIF connection */
-static void cosm_scif_connect_exit(void)
-{
- if (client_epd) {
- scif_close(client_epd);
- client_epd = NULL;
- }
-}
-
-/*
- * COSM SCIF client thread function: waits for messages from the host and sends
- * a heartbeat to the host
- */
-static int cosm_scif_client(void *unused)
-{
- struct cosm_msg msg = { .id = COSM_MSG_HEARTBEAT };
- struct scif_pollepd pollepd;
- int rc;
-
- allow_signal(SIGKILL);
-
- while (!kthread_should_stop()) {
- pollepd.epd = client_epd;
- pollepd.events = EPOLLIN;
-
- rc = scif_poll(&pollepd, 1, COSM_HEARTBEAT_SEND_MSEC);
- if (rc < 0) {
- if (-EINTR != rc)
- dev_err(&client_spdev->dev,
- "%s %d scif_poll rc %d\n",
- __func__, __LINE__, rc);
- continue;
- }
-
- if (pollepd.revents & EPOLLIN)
- cosm_client_recv();
-
- msg.id = COSM_MSG_HEARTBEAT;
- rc = scif_send(client_epd, &msg, sizeof(msg), SCIF_SEND_BLOCK);
- if (rc < 0)
- dev_err(&client_spdev->dev, "%s %d scif_send rc %d\n",
- __func__, __LINE__, rc);
- }
-
- dev_dbg(&client_spdev->dev, "%s %d Client thread stopped\n",
- __func__, __LINE__);
- return 0;
-}
-
-static void cosm_scif_probe(struct scif_peer_dev *spdev)
-{
- int rc;
-
- dev_dbg(&spdev->dev, "%s %d: dnode %d\n",
- __func__, __LINE__, spdev->dnode);
-
- /* We are only interested in the host with spdev->dnode == 0 */
- if (spdev->dnode)
- return;
-
- client_spdev = spdev;
- rc = cosm_scif_connect();
- if (rc)
- goto exit;
-
- rc = register_reboot_notifier(&cosm_reboot);
- if (rc) {
- dev_err(&spdev->dev,
- "reboot notifier registration failed rc %d\n", rc);
- goto connect_exit;
- }
-
- client_thread = kthread_run(cosm_scif_client, NULL, "cosm_client");
- if (IS_ERR(client_thread)) {
- rc = PTR_ERR(client_thread);
- dev_err(&spdev->dev, "%s %d kthread_run rc %d\n",
- __func__, __LINE__, rc);
- goto unreg_reboot;
- }
- return;
-unreg_reboot:
- unregister_reboot_notifier(&cosm_reboot);
-connect_exit:
- cosm_scif_connect_exit();
-exit:
- client_spdev = NULL;
-}
-
-static void cosm_scif_remove(struct scif_peer_dev *spdev)
-{
- int rc;
-
- dev_dbg(&spdev->dev, "%s %d: dnode %d\n",
- __func__, __LINE__, spdev->dnode);
-
- if (spdev->dnode)
- return;
-
- if (!IS_ERR_OR_NULL(client_thread)) {
- rc = send_sig(SIGKILL, client_thread, 0);
- if (rc) {
- pr_err("%s %d send_sig rc %d\n",
- __func__, __LINE__, rc);
- return;
- }
- kthread_stop(client_thread);
- }
- unregister_reboot_notifier(&cosm_reboot);
- cosm_scif_connect_exit();
- client_spdev = NULL;
-}
-
-static struct scif_client scif_client_cosm = {
- .name = KBUILD_MODNAME,
- .probe = cosm_scif_probe,
- .remove = cosm_scif_remove,
-};
-
-static int __init cosm_client_init(void)
-{
- int rc = scif_client_register(&scif_client_cosm);
-
- if (rc)
- pr_err("scif_client_register failed rc %d\n", rc);
- return rc;
-}
-
-static void __exit cosm_client_exit(void)
-{
- scif_client_unregister(&scif_client_cosm);
-}
-
-module_init(cosm_client_init);
-module_exit(cosm_client_exit);
-
-MODULE_AUTHOR("Intel Corporation");
-MODULE_DESCRIPTION("Intel(R) MIC card OS state management client driver");
-MODULE_LICENSE("GPL v2");
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0
-#
-# Makefile - Intel MIC Linux driver.
-# Copyright(c) 2013, Intel Corporation.
-#
-obj-$(CONFIG_INTEL_MIC_HOST) += mic_host.o
-mic_host-objs := mic_main.o
-mic_host-objs += mic_x100.o
-mic_host-objs += mic_smpt.o
-mic_host-objs += mic_intr.o
-mic_host-objs += mic_boot.o
-mic_host-objs += mic_debugfs.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Intel MIC Host driver.
- */
-#include <linux/delay.h>
-#include <linux/firmware.h>
-#include <linux/pci.h>
-#include <linux/kmod.h>
-#include <linux/dma-map-ops.h>
-#include <linux/mic_common.h>
-#include <linux/mic_bus.h>
-#include "../bus/scif_bus.h"
-#include "../bus/vop_bus.h"
-#include "../common/mic_dev.h"
-#include "mic_device.h"
-#include "mic_smpt.h"
-
-static inline struct mic_device *vpdev_to_mdev(struct device *dev)
-{
- return dev_get_drvdata(dev->parent);
-}
-
-static dma_addr_t
-_mic_dma_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction dir, unsigned long attrs)
-{
- void *va = phys_to_virt(page_to_phys(page)) + offset;
- struct mic_device *mdev = vpdev_to_mdev(dev);
-
- return mic_map_single(mdev, va, size);
-}
-
-static void _mic_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
- size_t size, enum dma_data_direction dir,
- unsigned long attrs)
-{
- struct mic_device *mdev = vpdev_to_mdev(dev);
-
- mic_unmap_single(mdev, dma_addr, size);
-}
-
-static const struct dma_map_ops _mic_dma_ops = {
- .map_page = _mic_dma_map_page,
- .unmap_page = _mic_dma_unmap_page,
-};
-
-static struct mic_irq *
-__mic_request_irq(struct vop_device *vpdev,
- irqreturn_t (*func)(int irq, void *data),
- const char *name, void *data, int intr_src)
-{
- struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
-
- return mic_request_threaded_irq(mdev, func, NULL, name, data,
- intr_src, MIC_INTR_DB);
-}
-
-static void __mic_free_irq(struct vop_device *vpdev,
- struct mic_irq *cookie, void *data)
-{
- struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
-
- mic_free_irq(mdev, cookie, data);
-}
-
-static void __mic_ack_interrupt(struct vop_device *vpdev, int num)
-{
- struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
-
- mdev->ops->intr_workarounds(mdev);
-}
-
-static int __mic_next_db(struct vop_device *vpdev)
-{
- struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
-
- return mic_next_db(mdev);
-}
-
-static void *__mic_get_dp(struct vop_device *vpdev)
-{
- struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
-
- return mdev->dp;
-}
-
-static void __iomem *__mic_get_remote_dp(struct vop_device *vpdev)
-{
- return NULL;
-}
-
-static void __mic_send_intr(struct vop_device *vpdev, int db)
-{
- struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
-
- mdev->ops->send_intr(mdev, db);
-}
-
-static void __iomem *__mic_ioremap(struct vop_device *vpdev,
- dma_addr_t pa, size_t len)
-{
- struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
-
- return mdev->aper.va + pa;
-}
-
-static void __mic_iounmap(struct vop_device *vpdev, void __iomem *va)
-{
- /* nothing to do */
-}
-
-static struct vop_hw_ops vop_hw_ops = {
- .request_irq = __mic_request_irq,
- .free_irq = __mic_free_irq,
- .ack_interrupt = __mic_ack_interrupt,
- .next_db = __mic_next_db,
- .get_dp = __mic_get_dp,
- .get_remote_dp = __mic_get_remote_dp,
- .send_intr = __mic_send_intr,
- .remap = __mic_ioremap,
- .unmap = __mic_iounmap,
-};
-
-static inline struct mic_device *scdev_to_mdev(struct scif_hw_dev *scdev)
-{
- return dev_get_drvdata(scdev->dev.parent);
-}
-
-static void *__mic_dma_alloc(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t gfp,
- unsigned long attrs)
-{
- struct scif_hw_dev *scdev = dev_get_drvdata(dev);
- struct mic_device *mdev = scdev_to_mdev(scdev);
- dma_addr_t tmp;
- void *va = kzalloc(size, gfp);
-
- if (va) {
- tmp = mic_map_single(mdev, va, size);
- if (dma_mapping_error(dev, tmp)) {
- kfree(va);
- va = NULL;
- } else {
- *dma_handle = tmp;
- }
- }
- return va;
-}
-
-static void __mic_dma_free(struct device *dev, size_t size, void *vaddr,
- dma_addr_t dma_handle, unsigned long attrs)
-{
- struct scif_hw_dev *scdev = dev_get_drvdata(dev);
- struct mic_device *mdev = scdev_to_mdev(scdev);
-
- mic_unmap_single(mdev, dma_handle, size);
- kfree(vaddr);
-}
-
-static dma_addr_t
-__mic_dma_map_page(struct device *dev, struct page *page, unsigned long offset,
- size_t size, enum dma_data_direction dir,
- unsigned long attrs)
-{
- void *va = phys_to_virt(page_to_phys(page)) + offset;
- struct scif_hw_dev *scdev = dev_get_drvdata(dev);
- struct mic_device *mdev = scdev_to_mdev(scdev);
-
- return mic_map_single(mdev, va, size);
-}
-
-static void
-__mic_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
- size_t size, enum dma_data_direction dir,
- unsigned long attrs)
-{
- struct scif_hw_dev *scdev = dev_get_drvdata(dev);
- struct mic_device *mdev = scdev_to_mdev(scdev);
-
- mic_unmap_single(mdev, dma_addr, size);
-}
-
-static int __mic_dma_map_sg(struct device *dev, struct scatterlist *sg,
- int nents, enum dma_data_direction dir,
- unsigned long attrs)
-{
- struct scif_hw_dev *scdev = dev_get_drvdata(dev);
- struct mic_device *mdev = scdev_to_mdev(scdev);
- struct scatterlist *s;
- int i, j, ret;
- dma_addr_t da;
-
- ret = dma_map_sg(&mdev->pdev->dev, sg, nents, dir);
- if (ret <= 0)
- return 0;
-
- for_each_sg(sg, s, nents, i) {
- da = mic_map(mdev, sg_dma_address(s) + s->offset, s->length);
- if (!da)
- goto err;
- sg_dma_address(s) = da;
- }
- return nents;
-err:
- for_each_sg(sg, s, i, j) {
- mic_unmap(mdev, sg_dma_address(s), s->length);
- sg_dma_address(s) = mic_to_dma_addr(mdev, sg_dma_address(s));
- }
- dma_unmap_sg(&mdev->pdev->dev, sg, nents, dir);
- return 0;
-}
-
-static void __mic_dma_unmap_sg(struct device *dev,
- struct scatterlist *sg, int nents,
- enum dma_data_direction dir,
- unsigned long attrs)
-{
- struct scif_hw_dev *scdev = dev_get_drvdata(dev);
- struct mic_device *mdev = scdev_to_mdev(scdev);
- struct scatterlist *s;
- dma_addr_t da;
- int i;
-
- for_each_sg(sg, s, nents, i) {
- da = mic_to_dma_addr(mdev, sg_dma_address(s));
- mic_unmap(mdev, sg_dma_address(s), s->length);
- sg_dma_address(s) = da;
- }
- dma_unmap_sg(&mdev->pdev->dev, sg, nents, dir);
-}
-
-static const struct dma_map_ops __mic_dma_ops = {
- .alloc = __mic_dma_alloc,
- .free = __mic_dma_free,
- .map_page = __mic_dma_map_page,
- .unmap_page = __mic_dma_unmap_page,
- .map_sg = __mic_dma_map_sg,
- .unmap_sg = __mic_dma_unmap_sg,
-};
-
-static struct mic_irq *
-___mic_request_irq(struct scif_hw_dev *scdev,
- irqreturn_t (*func)(int irq, void *data),
- const char *name,
- void *data, int db)
-{
- struct mic_device *mdev = scdev_to_mdev(scdev);
-
- return mic_request_threaded_irq(mdev, func, NULL, name, data,
- db, MIC_INTR_DB);
-}
-
-static void
-___mic_free_irq(struct scif_hw_dev *scdev,
- struct mic_irq *cookie, void *data)
-{
- struct mic_device *mdev = scdev_to_mdev(scdev);
-
- mic_free_irq(mdev, cookie, data);
-}
-
-static void ___mic_ack_interrupt(struct scif_hw_dev *scdev, int num)
-{
- struct mic_device *mdev = scdev_to_mdev(scdev);
-
- mdev->ops->intr_workarounds(mdev);
-}
-
-static int ___mic_next_db(struct scif_hw_dev *scdev)
-{
- struct mic_device *mdev = scdev_to_mdev(scdev);
-
- return mic_next_db(mdev);
-}
-
-static void ___mic_send_intr(struct scif_hw_dev *scdev, int db)
-{
- struct mic_device *mdev = scdev_to_mdev(scdev);
-
- mdev->ops->send_intr(mdev, db);
-}
-
-static void __iomem *___mic_ioremap(struct scif_hw_dev *scdev,
- phys_addr_t pa, size_t len)
-{
- struct mic_device *mdev = scdev_to_mdev(scdev);
-
- return mdev->aper.va + pa;
-}
-
-static void ___mic_iounmap(struct scif_hw_dev *scdev, void __iomem *va)
-{
- /* nothing to do */
-}
-
-static struct scif_hw_ops scif_hw_ops = {
- .request_irq = ___mic_request_irq,
- .free_irq = ___mic_free_irq,
- .ack_interrupt = ___mic_ack_interrupt,
- .next_db = ___mic_next_db,
- .send_intr = ___mic_send_intr,
- .remap = ___mic_ioremap,
- .unmap = ___mic_iounmap,
-};
-
-static inline struct mic_device *mbdev_to_mdev(struct mbus_device *mbdev)
-{
- return dev_get_drvdata(mbdev->dev.parent);
-}
-
-static dma_addr_t
-mic_dma_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size, enum dma_data_direction dir,
- unsigned long attrs)
-{
- void *va = phys_to_virt(page_to_phys(page)) + offset;
- struct mic_device *mdev = dev_get_drvdata(dev->parent);
-
- return mic_map_single(mdev, va, size);
-}
-
-static void
-mic_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
- size_t size, enum dma_data_direction dir,
- unsigned long attrs)
-{
- struct mic_device *mdev = dev_get_drvdata(dev->parent);
- mic_unmap_single(mdev, dma_addr, size);
-}
-
-static const struct dma_map_ops mic_dma_ops = {
- .map_page = mic_dma_map_page,
- .unmap_page = mic_dma_unmap_page,
-};
-
-static struct mic_irq *
-_mic_request_threaded_irq(struct mbus_device *mbdev,
- irq_handler_t handler, irq_handler_t thread_fn,
- const char *name, void *data, int intr_src)
-{
- return mic_request_threaded_irq(mbdev_to_mdev(mbdev), handler,
- thread_fn, name, data,
- intr_src, MIC_INTR_DMA);
-}
-
-static void _mic_free_irq(struct mbus_device *mbdev,
- struct mic_irq *cookie, void *data)
-{
- mic_free_irq(mbdev_to_mdev(mbdev), cookie, data);
-}
-
-static void _mic_ack_interrupt(struct mbus_device *mbdev, int num)
-{
- struct mic_device *mdev = mbdev_to_mdev(mbdev);
- mdev->ops->intr_workarounds(mdev);
-}
-
-static struct mbus_hw_ops mbus_hw_ops = {
- .request_threaded_irq = _mic_request_threaded_irq,
- .free_irq = _mic_free_irq,
- .ack_interrupt = _mic_ack_interrupt,
-};
-
-/* Initialize the MIC bootparams */
-void mic_bootparam_init(struct mic_device *mdev)
-{
- struct mic_bootparam *bootparam = mdev->dp;
-
- bootparam->magic = cpu_to_le32(MIC_MAGIC);
- bootparam->h2c_config_db = -1;
- bootparam->node_id = mdev->id + 1;
- bootparam->scif_host_dma_addr = 0x0;
- bootparam->scif_card_dma_addr = 0x0;
- bootparam->c2h_scif_db = -1;
- bootparam->h2c_scif_db = -1;
-}
-
-static inline struct mic_device *cosmdev_to_mdev(struct cosm_device *cdev)
-{
- return dev_get_drvdata(cdev->dev.parent);
-}
-
-static void _mic_reset(struct cosm_device *cdev)
-{
- struct mic_device *mdev = cosmdev_to_mdev(cdev);
-
- mdev->ops->reset_fw_ready(mdev);
- mdev->ops->reset(mdev);
-}
-
-static bool _mic_ready(struct cosm_device *cdev)
-{
- struct mic_device *mdev = cosmdev_to_mdev(cdev);
-
- return mdev->ops->is_fw_ready(mdev);
-}
-
-/**
- * mic_request_dma_chans - Request DMA channels
- * @mdev: pointer to mic_device instance
- *
- * returns number of DMA channels acquired
- */
-static int mic_request_dma_chans(struct mic_device *mdev)
-{
- dma_cap_mask_t mask;
- struct dma_chan *chan;
-
- dma_cap_zero(mask);
- dma_cap_set(DMA_MEMCPY, mask);
-
- do {
- chan = dma_request_channel(mask, mdev->ops->dma_filter,
- &mdev->pdev->dev);
- if (chan) {
- mdev->dma_ch[mdev->num_dma_ch++] = chan;
- if (mdev->num_dma_ch >= MIC_MAX_DMA_CHAN)
- break;
- }
- } while (chan);
- dev_info(&mdev->pdev->dev, "DMA channels # %d\n", mdev->num_dma_ch);
- return mdev->num_dma_ch;
-}
-
-/**
- * mic_free_dma_chans - release DMA channels
- * @mdev: pointer to mic_device instance
- *
- * returns none
- */
-static void mic_free_dma_chans(struct mic_device *mdev)
-{
- int i = 0;
-
- for (i = 0; i < mdev->num_dma_ch; i++) {
- dma_release_channel(mdev->dma_ch[i]);
- mdev->dma_ch[i] = NULL;
- }
- mdev->num_dma_ch = 0;
-}
-
-/**
- * _mic_start - Start the MIC.
- * @cdev: pointer to cosm_device instance
- * @id: MIC device id/index provided by COSM used in other drivers like SCIF
- *
- * This function prepares an MIC for boot and initiates boot.
- * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
- *
- * For all cosm_hw_ops the caller holds a mutex to ensure serialization.
- */
-static int _mic_start(struct cosm_device *cdev, int id)
-{
- struct mic_device *mdev = cosmdev_to_mdev(cdev);
- int rc;
-
- mic_bootparam_init(mdev);
- mdev->dma_mbdev = mbus_register_device(&mdev->pdev->dev,
- MBUS_DEV_DMA_HOST, &mic_dma_ops,
- &mbus_hw_ops, id, mdev->mmio.va);
- if (IS_ERR(mdev->dma_mbdev)) {
- rc = PTR_ERR(mdev->dma_mbdev);
- goto unlock_ret;
- }
- if (!mic_request_dma_chans(mdev)) {
- rc = -ENODEV;
- goto dma_remove;
- }
- mdev->scdev = scif_register_device(&mdev->pdev->dev, MIC_SCIF_DEV,
- &__mic_dma_ops, &scif_hw_ops,
- id + 1, 0, &mdev->mmio,
- &mdev->aper, mdev->dp, NULL,
- mdev->dma_ch, mdev->num_dma_ch,
- true);
- if (IS_ERR(mdev->scdev)) {
- rc = PTR_ERR(mdev->scdev);
- goto dma_free;
- }
-
- mdev->vpdev = vop_register_device(&mdev->pdev->dev,
- VOP_DEV_TRNSP, &_mic_dma_ops,
- &vop_hw_ops, id + 1, &mdev->aper,
- mdev->dma_ch[0]);
- if (IS_ERR(mdev->vpdev)) {
- rc = PTR_ERR(mdev->vpdev);
- goto scif_remove;
- }
-
- rc = mdev->ops->load_mic_fw(mdev, NULL);
- if (rc)
- goto vop_remove;
- mic_smpt_restore(mdev);
- mic_intr_restore(mdev);
- mdev->intr_ops->enable_interrupts(mdev);
- mdev->ops->write_spad(mdev, MIC_DPLO_SPAD, mdev->dp_dma_addr);
- mdev->ops->write_spad(mdev, MIC_DPHI_SPAD, mdev->dp_dma_addr >> 32);
- mdev->ops->send_firmware_intr(mdev);
- goto unlock_ret;
-vop_remove:
- vop_unregister_device(mdev->vpdev);
-scif_remove:
- scif_unregister_device(mdev->scdev);
-dma_free:
- mic_free_dma_chans(mdev);
-dma_remove:
- mbus_unregister_device(mdev->dma_mbdev);
-unlock_ret:
- return rc;
-}
-
-/**
- * _mic_stop - Prepare the MIC for reset and trigger reset.
- * @cdev: pointer to cosm_device instance
- * @force: force a MIC to reset even if it is already offline.
- *
- * RETURNS: None.
- */
-static void _mic_stop(struct cosm_device *cdev, bool force)
-{
- struct mic_device *mdev = cosmdev_to_mdev(cdev);
-
- /*
- * Since SCIF handles card shutdown and reset (using COSM), it will
- * will be the first to be registered and the last to be
- * unregistered.
- */
- vop_unregister_device(mdev->vpdev);
- scif_unregister_device(mdev->scdev);
- mic_free_dma_chans(mdev);
- mbus_unregister_device(mdev->dma_mbdev);
- mic_bootparam_init(mdev);
-}
-
-static ssize_t _mic_family(struct cosm_device *cdev, char *buf)
-{
- struct mic_device *mdev = cosmdev_to_mdev(cdev);
- static const char *family[MIC_FAMILY_LAST] = { "x100", "Unknown" };
-
- return scnprintf(buf, PAGE_SIZE, "%s\n", family[mdev->family]);
-}
-
-static ssize_t _mic_stepping(struct cosm_device *cdev, char *buf)
-{
- struct mic_device *mdev = cosmdev_to_mdev(cdev);
- const char *string = "??";
-
- switch (mdev->stepping) {
- case MIC_A0_STEP:
- string = "A0";
- break;
- case MIC_B0_STEP:
- string = "B0";
- break;
- case MIC_B1_STEP:
- string = "B1";
- break;
- case MIC_C0_STEP:
- string = "C0";
- break;
- default:
- break;
- }
- return scnprintf(buf, PAGE_SIZE, "%s\n", string);
-}
-
-static struct mic_mw *_mic_aper(struct cosm_device *cdev)
-{
- struct mic_device *mdev = cosmdev_to_mdev(cdev);
-
- return &mdev->aper;
-}
-
-struct cosm_hw_ops cosm_hw_ops = {
- .reset = _mic_reset,
- .force_reset = _mic_reset,
- .post_reset = NULL,
- .ready = _mic_ready,
- .start = _mic_start,
- .stop = _mic_stop,
- .family = _mic_family,
- .stepping = _mic_stepping,
- .aper = _mic_aper,
-};
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Intel MIC Host driver.
- */
-#include <linux/debugfs.h>
-#include <linux/pci.h>
-#include <linux/seq_file.h>
-
-#include <linux/mic_common.h>
-#include "../common/mic_dev.h"
-#include "mic_device.h"
-#include "mic_smpt.h"
-
-/* Debugfs parent dir */
-static struct dentry *mic_dbg;
-
-static int mic_smpt_show(struct seq_file *s, void *pos)
-{
- int i;
- struct mic_device *mdev = s->private;
- unsigned long flags;
-
- seq_printf(s, "MIC %-2d |%-10s| %-14s %-10s\n",
- mdev->id, "SMPT entry", "SW DMA addr", "RefCount");
- seq_puts(s, "====================================================\n");
-
- if (mdev->smpt) {
- struct mic_smpt_info *smpt_info = mdev->smpt;
- spin_lock_irqsave(&smpt_info->smpt_lock, flags);
- for (i = 0; i < smpt_info->info.num_reg; i++) {
- seq_printf(s, "%9s|%-10d| %-#14llx %-10lld\n",
- " ", i, smpt_info->entry[i].dma_addr,
- smpt_info->entry[i].ref_count);
- }
- spin_unlock_irqrestore(&smpt_info->smpt_lock, flags);
- }
- seq_puts(s, "====================================================\n");
- return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(mic_smpt);
-
-static int mic_post_code_show(struct seq_file *s, void *pos)
-{
- struct mic_device *mdev = s->private;
- u32 reg = mdev->ops->get_postcode(mdev);
-
- seq_printf(s, "%c%c", reg & 0xff, (reg >> 8) & 0xff);
- return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(mic_post_code);
-
-static int mic_msi_irq_info_show(struct seq_file *s, void *pos)
-{
- struct mic_device *mdev = s->private;
- int reg;
- int i, j;
- u16 entry;
- u16 vector;
- struct pci_dev *pdev = mdev->pdev;
-
- if (pci_dev_msi_enabled(pdev)) {
- for (i = 0; i < mdev->irq_info.num_vectors; i++) {
- if (pdev->msix_enabled) {
- entry = mdev->irq_info.msix_entries[i].entry;
- vector = mdev->irq_info.msix_entries[i].vector;
- } else {
- entry = 0;
- vector = pdev->irq;
- }
-
- reg = mdev->intr_ops->read_msi_to_src_map(mdev, entry);
-
- seq_printf(s, "%s %-10d %s %-10d MXAR[%d]: %08X\n",
- "IRQ:", vector, "Entry:", entry, i, reg);
-
- seq_printf(s, "%-10s", "offset:");
- for (j = (MIC_NUM_OFFSETS - 1); j >= 0; j--)
- seq_printf(s, "%4d ", j);
- seq_puts(s, "\n");
-
-
- seq_printf(s, "%-10s", "count:");
- for (j = (MIC_NUM_OFFSETS - 1); j >= 0; j--)
- seq_printf(s, "%4d ",
- (mdev->irq_info.mic_msi_map[i] &
- BIT(j)) ? 1 : 0);
- seq_puts(s, "\n\n");
- }
- } else {
- seq_puts(s, "MSI/MSIx interrupts not enabled\n");
- }
-
- return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(mic_msi_irq_info);
-
-/*
- * mic_create_debug_dir - Initialize MIC debugfs entries.
- */
-void mic_create_debug_dir(struct mic_device *mdev)
-{
- char name[16];
-
- if (!mic_dbg)
- return;
-
- scnprintf(name, sizeof(name), "mic%d", mdev->id);
- mdev->dbg_dir = debugfs_create_dir(name, mic_dbg);
-
- debugfs_create_file("smpt", 0444, mdev->dbg_dir, mdev,
- &mic_smpt_fops);
-
- debugfs_create_file("post_code", 0444, mdev->dbg_dir, mdev,
- &mic_post_code_fops);
-
- debugfs_create_file("msi_irq_info", 0444, mdev->dbg_dir, mdev,
- &mic_msi_irq_info_fops);
-}
-
-/*
- * mic_delete_debug_dir - Uninitialize MIC debugfs entries.
- */
-void mic_delete_debug_dir(struct mic_device *mdev)
-{
- debugfs_remove_recursive(mdev->dbg_dir);
-}
-
-/*
- * mic_init_debugfs - Initialize global debugfs entry.
- */
-void __init mic_init_debugfs(void)
-{
- mic_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
-}
-
-/*
- * mic_exit_debugfs - Uninitialize global debugfs entry
- */
-void mic_exit_debugfs(void)
-{
- debugfs_remove(mic_dbg);
-}
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Intel MIC Host driver.
- */
-#ifndef _MIC_DEVICE_H_
-#define _MIC_DEVICE_H_
-
-#include <linux/cdev.h>
-#include <linux/idr.h>
-#include <linux/notifier.h>
-#include <linux/irqreturn.h>
-#include <linux/dmaengine.h>
-#include <linux/miscdevice.h>
-#include <linux/mic_bus.h>
-#include "../bus/scif_bus.h"
-#include "../bus/vop_bus.h"
-#include "../bus/cosm_bus.h"
-#include "mic_intr.h"
-
-/**
- * enum mic_stepping - MIC stepping ids.
- */
-enum mic_stepping {
- MIC_A0_STEP = 0x0,
- MIC_B0_STEP = 0x10,
- MIC_B1_STEP = 0x11,
- MIC_C0_STEP = 0x20,
-};
-
-extern struct cosm_hw_ops cosm_hw_ops;
-
-/**
- * struct mic_device - MIC device information for each card.
- *
- * @mmio: MMIO bar information.
- * @aper: Aperture bar information.
- * @family: The MIC family to which this device belongs.
- * @ops: MIC HW specific operations.
- * @id: The unique device id for this MIC device.
- * @stepping: Stepping ID.
- * @pdev: Underlying PCI device.
- * @mic_mutex: Mutex for synchronizing access to mic_device.
- * @intr_ops: HW specific interrupt operations.
- * @smpt_ops: Hardware specific SMPT operations.
- * @smpt: MIC SMPT information.
- * @intr_info: H/W specific interrupt information.
- * @irq_info: The OS specific irq information
- * @dbg_dir: debugfs directory of this MIC device.
- * @bootaddr: MIC boot address.
- * @dp: virtio device page
- * @dp_dma_addr: virtio device page DMA address.
- * @dma_mbdev: MIC BUS DMA device.
- * @dma_ch - Array of DMA channels
- * @num_dma_ch - Number of DMA channels available
- * @scdev: SCIF device on the SCIF virtual bus.
- * @vpdev: Virtio over PCIe device on the VOP virtual bus.
- * @cosm_dev: COSM device
- */
-struct mic_device {
- struct mic_mw mmio;
- struct mic_mw aper;
- enum mic_hw_family family;
- struct mic_hw_ops *ops;
- int id;
- enum mic_stepping stepping;
- struct pci_dev *pdev;
- struct mutex mic_mutex;
- struct mic_hw_intr_ops *intr_ops;
- struct mic_smpt_ops *smpt_ops;
- struct mic_smpt_info *smpt;
- struct mic_intr_info *intr_info;
- struct mic_irq_info irq_info;
- struct dentry *dbg_dir;
- u32 bootaddr;
- void *dp;
- dma_addr_t dp_dma_addr;
- struct mbus_device *dma_mbdev;
- struct dma_chan *dma_ch[MIC_MAX_DMA_CHAN];
- int num_dma_ch;
- struct scif_hw_dev *scdev;
- struct vop_device *vpdev;
- struct cosm_device *cosm_dev;
-};
-
-/**
- * struct mic_hw_ops - MIC HW specific operations.
- * @aper_bar: Aperture bar resource number.
- * @mmio_bar: MMIO bar resource number.
- * @read_spad: Read from scratch pad register.
- * @write_spad: Write to scratch pad register.
- * @send_intr: Send an interrupt for a particular doorbell on the card.
- * @ack_interrupt: Hardware specific operations to ack the h/w on
- * receipt of an interrupt.
- * @intr_workarounds: Hardware specific workarounds needed after
- * handling an interrupt.
- * @reset: Reset the remote processor.
- * @reset_fw_ready: Reset firmware ready field.
- * @is_fw_ready: Check if firmware is ready for OS download.
- * @send_firmware_intr: Send an interrupt to the card firmware.
- * @load_mic_fw: Load firmware segments required to boot the card
- * into card memory. This includes the kernel, command line, ramdisk etc.
- * @get_postcode: Get post code status from firmware.
- * @dma_filter: DMA filter function to be used.
- */
-struct mic_hw_ops {
- u8 aper_bar;
- u8 mmio_bar;
- u32 (*read_spad)(struct mic_device *mdev, unsigned int idx);
- void (*write_spad)(struct mic_device *mdev, unsigned int idx, u32 val);
- void (*send_intr)(struct mic_device *mdev, int doorbell);
- u32 (*ack_interrupt)(struct mic_device *mdev);
- void (*intr_workarounds)(struct mic_device *mdev);
- void (*reset)(struct mic_device *mdev);
- void (*reset_fw_ready)(struct mic_device *mdev);
- bool (*is_fw_ready)(struct mic_device *mdev);
- void (*send_firmware_intr)(struct mic_device *mdev);
- int (*load_mic_fw)(struct mic_device *mdev, const char *buf);
- u32 (*get_postcode)(struct mic_device *mdev);
- bool (*dma_filter)(struct dma_chan *chan, void *param);
-};
-
-/**
- * mic_mmio_read - read from an MMIO register.
- * @mw: MMIO register base virtual address.
- * @offset: register offset.
- *
- * RETURNS: register value.
- */
-static inline u32 mic_mmio_read(struct mic_mw *mw, u32 offset)
-{
- return ioread32(mw->va + offset);
-}
-
-/**
- * mic_mmio_write - write to an MMIO register.
- * @mw: MMIO register base virtual address.
- * @val: the data value to put into the register
- * @offset: register offset.
- *
- * RETURNS: none.
- */
-static inline void
-mic_mmio_write(struct mic_mw *mw, u32 val, u32 offset)
-{
- iowrite32(val, mw->va + offset);
-}
-
-void mic_bootparam_init(struct mic_device *mdev);
-void mic_create_debug_dir(struct mic_device *dev);
-void mic_delete_debug_dir(struct mic_device *dev);
-void __init mic_init_debugfs(void);
-void mic_exit_debugfs(void);
-#endif
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Intel MIC Host driver.
- */
-#include <linux/pci.h>
-#include <linux/interrupt.h>
-
-#include "../common/mic_dev.h"
-#include "mic_device.h"
-
-static irqreturn_t mic_thread_fn(int irq, void *dev)
-{
- struct mic_device *mdev = dev;
- struct mic_intr_info *intr_info = mdev->intr_info;
- struct mic_irq_info *irq_info = &mdev->irq_info;
- struct mic_intr_cb *intr_cb;
- struct pci_dev *pdev = mdev->pdev;
- int i;
-
- spin_lock(&irq_info->mic_thread_lock);
- for (i = intr_info->intr_start_idx[MIC_INTR_DB];
- i < intr_info->intr_len[MIC_INTR_DB]; i++)
- if (test_and_clear_bit(i, &irq_info->mask)) {
- list_for_each_entry(intr_cb, &irq_info->cb_list[i],
- list)
- if (intr_cb->thread_fn)
- intr_cb->thread_fn(pdev->irq,
- intr_cb->data);
- }
- spin_unlock(&irq_info->mic_thread_lock);
- return IRQ_HANDLED;
-}
-/**
- * mic_interrupt - Generic interrupt handler for
- * MSI and INTx based interrupts.
- * @irq: interrupt to handle (unused)
- * @dev: pointer to the mic_device instance
- */
-static irqreturn_t mic_interrupt(int irq, void *dev)
-{
- struct mic_device *mdev = dev;
- struct mic_intr_info *intr_info = mdev->intr_info;
- struct mic_irq_info *irq_info = &mdev->irq_info;
- struct mic_intr_cb *intr_cb;
- struct pci_dev *pdev = mdev->pdev;
- u32 mask;
- int i;
-
- mask = mdev->ops->ack_interrupt(mdev);
- if (!mask)
- return IRQ_NONE;
-
- spin_lock(&irq_info->mic_intr_lock);
- for (i = intr_info->intr_start_idx[MIC_INTR_DB];
- i < intr_info->intr_len[MIC_INTR_DB]; i++)
- if (mask & BIT(i)) {
- list_for_each_entry(intr_cb, &irq_info->cb_list[i],
- list)
- if (intr_cb->handler)
- intr_cb->handler(pdev->irq,
- intr_cb->data);
- set_bit(i, &irq_info->mask);
- }
- spin_unlock(&irq_info->mic_intr_lock);
- return IRQ_WAKE_THREAD;
-}
-
-/* Return the interrupt offset from the index. Index is 0 based. */
-static u16 mic_map_src_to_offset(struct mic_device *mdev,
- int intr_src, enum mic_intr_type type)
-{
- if (type >= MIC_NUM_INTR_TYPES)
- return MIC_NUM_OFFSETS;
- if (intr_src >= mdev->intr_info->intr_len[type])
- return MIC_NUM_OFFSETS;
-
- return mdev->intr_info->intr_start_idx[type] + intr_src;
-}
-
-/* Return next available msix_entry. */
-static struct msix_entry *mic_get_available_vector(struct mic_device *mdev)
-{
- int i;
- struct mic_irq_info *info = &mdev->irq_info;
-
- for (i = 0; i < info->num_vectors; i++)
- if (!info->mic_msi_map[i])
- return &info->msix_entries[i];
- return NULL;
-}
-
-/**
- * mic_register_intr_callback - Register a callback handler for the
- * given source id.
- *
- * @mdev: pointer to the mic_device instance
- * @idx: The source id to be registered.
- * @handler: The function to be called when the source id receives
- * the interrupt.
- * @thread_fn: thread fn. corresponding to the handler
- * @data: Private data of the requester.
- * Return the callback structure that was registered or an
- * appropriate error on failure.
- */
-static struct mic_intr_cb *mic_register_intr_callback(struct mic_device *mdev,
- u8 idx, irq_handler_t handler, irq_handler_t thread_fn,
- void *data)
-{
- struct mic_intr_cb *intr_cb;
- unsigned long flags;
- int rc;
- intr_cb = kmalloc(sizeof(*intr_cb), GFP_KERNEL);
-
- if (!intr_cb)
- return ERR_PTR(-ENOMEM);
-
- intr_cb->handler = handler;
- intr_cb->thread_fn = thread_fn;
- intr_cb->data = data;
- intr_cb->cb_id = ida_simple_get(&mdev->irq_info.cb_ida,
- 0, 0, GFP_KERNEL);
- if (intr_cb->cb_id < 0) {
- rc = intr_cb->cb_id;
- goto ida_fail;
- }
-
- spin_lock(&mdev->irq_info.mic_thread_lock);
- spin_lock_irqsave(&mdev->irq_info.mic_intr_lock, flags);
- list_add_tail(&intr_cb->list, &mdev->irq_info.cb_list[idx]);
- spin_unlock_irqrestore(&mdev->irq_info.mic_intr_lock, flags);
- spin_unlock(&mdev->irq_info.mic_thread_lock);
-
- return intr_cb;
-ida_fail:
- kfree(intr_cb);
- return ERR_PTR(rc);
-}
-
-/**
- * mic_unregister_intr_callback - Unregister the callback handler
- * identified by its callback id.
- *
- * @mdev: pointer to the mic_device instance
- * @idx: The callback structure id to be unregistered.
- * Return the source id that was unregistered or MIC_NUM_OFFSETS if no
- * such callback handler was found.
- */
-static u8 mic_unregister_intr_callback(struct mic_device *mdev, u32 idx)
-{
- struct list_head *pos, *tmp;
- struct mic_intr_cb *intr_cb;
- unsigned long flags;
- int i;
-
- spin_lock(&mdev->irq_info.mic_thread_lock);
- spin_lock_irqsave(&mdev->irq_info.mic_intr_lock, flags);
- for (i = 0; i < MIC_NUM_OFFSETS; i++) {
- list_for_each_safe(pos, tmp, &mdev->irq_info.cb_list[i]) {
- intr_cb = list_entry(pos, struct mic_intr_cb, list);
- if (intr_cb->cb_id == idx) {
- list_del(pos);
- ida_simple_remove(&mdev->irq_info.cb_ida,
- intr_cb->cb_id);
- kfree(intr_cb);
- spin_unlock_irqrestore(
- &mdev->irq_info.mic_intr_lock, flags);
- spin_unlock(&mdev->irq_info.mic_thread_lock);
- return i;
- }
- }
- }
- spin_unlock_irqrestore(&mdev->irq_info.mic_intr_lock, flags);
- spin_unlock(&mdev->irq_info.mic_thread_lock);
- return MIC_NUM_OFFSETS;
-}
-
-/**
- * mic_setup_msix - Initializes MSIx interrupts.
- *
- * @mdev: pointer to mic_device instance
- * @pdev: PCI device structure
- *
- * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
- */
-static int mic_setup_msix(struct mic_device *mdev, struct pci_dev *pdev)
-{
- int rc, i;
- int entry_size = sizeof(*mdev->irq_info.msix_entries);
-
- mdev->irq_info.msix_entries = kmalloc_array(MIC_MIN_MSIX,
- entry_size, GFP_KERNEL);
- if (!mdev->irq_info.msix_entries) {
- rc = -ENOMEM;
- goto err_nomem1;
- }
-
- for (i = 0; i < MIC_MIN_MSIX; i++)
- mdev->irq_info.msix_entries[i].entry = i;
-
- rc = pci_enable_msix_exact(pdev, mdev->irq_info.msix_entries,
- MIC_MIN_MSIX);
- if (rc) {
- dev_dbg(&pdev->dev, "Error enabling MSIx. rc = %d\n", rc);
- goto err_enable_msix;
- }
-
- mdev->irq_info.num_vectors = MIC_MIN_MSIX;
- mdev->irq_info.mic_msi_map = kzalloc((sizeof(u32) *
- mdev->irq_info.num_vectors), GFP_KERNEL);
-
- if (!mdev->irq_info.mic_msi_map) {
- rc = -ENOMEM;
- goto err_nomem2;
- }
-
- dev_dbg(&mdev->pdev->dev,
- "%d MSIx irqs setup\n", mdev->irq_info.num_vectors);
- return 0;
-err_nomem2:
- pci_disable_msix(pdev);
-err_enable_msix:
- kfree(mdev->irq_info.msix_entries);
-err_nomem1:
- mdev->irq_info.num_vectors = 0;
- return rc;
-}
-
-/**
- * mic_setup_callbacks - Initialize data structures needed
- * to handle callbacks.
- *
- * @mdev: pointer to mic_device instance
- */
-static int mic_setup_callbacks(struct mic_device *mdev)
-{
- int i;
-
- mdev->irq_info.cb_list = kmalloc_array(MIC_NUM_OFFSETS,
- sizeof(*mdev->irq_info.cb_list),
- GFP_KERNEL);
- if (!mdev->irq_info.cb_list)
- return -ENOMEM;
-
- for (i = 0; i < MIC_NUM_OFFSETS; i++)
- INIT_LIST_HEAD(&mdev->irq_info.cb_list[i]);
- ida_init(&mdev->irq_info.cb_ida);
- spin_lock_init(&mdev->irq_info.mic_intr_lock);
- spin_lock_init(&mdev->irq_info.mic_thread_lock);
- return 0;
-}
-
-/**
- * mic_release_callbacks - Uninitialize data structures needed
- * to handle callbacks.
- *
- * @mdev: pointer to mic_device instance
- */
-static void mic_release_callbacks(struct mic_device *mdev)
-{
- unsigned long flags;
- struct list_head *pos, *tmp;
- struct mic_intr_cb *intr_cb;
- int i;
-
- spin_lock(&mdev->irq_info.mic_thread_lock);
- spin_lock_irqsave(&mdev->irq_info.mic_intr_lock, flags);
- for (i = 0; i < MIC_NUM_OFFSETS; i++) {
- if (list_empty(&mdev->irq_info.cb_list[i]))
- break;
-
- list_for_each_safe(pos, tmp, &mdev->irq_info.cb_list[i]) {
- intr_cb = list_entry(pos, struct mic_intr_cb, list);
- list_del(pos);
- ida_simple_remove(&mdev->irq_info.cb_ida,
- intr_cb->cb_id);
- kfree(intr_cb);
- }
- }
- spin_unlock_irqrestore(&mdev->irq_info.mic_intr_lock, flags);
- spin_unlock(&mdev->irq_info.mic_thread_lock);
- ida_destroy(&mdev->irq_info.cb_ida);
- kfree(mdev->irq_info.cb_list);
-}
-
-/**
- * mic_setup_msi - Initializes MSI interrupts.
- *
- * @mdev: pointer to mic_device instance
- * @pdev: PCI device structure
- *
- * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
- */
-static int mic_setup_msi(struct mic_device *mdev, struct pci_dev *pdev)
-{
- int rc;
-
- rc = pci_enable_msi(pdev);
- if (rc) {
- dev_dbg(&pdev->dev, "Error enabling MSI. rc = %d\n", rc);
- return rc;
- }
-
- mdev->irq_info.num_vectors = 1;
- mdev->irq_info.mic_msi_map = kzalloc((sizeof(u32) *
- mdev->irq_info.num_vectors), GFP_KERNEL);
-
- if (!mdev->irq_info.mic_msi_map) {
- rc = -ENOMEM;
- goto err_nomem1;
- }
-
- rc = mic_setup_callbacks(mdev);
- if (rc) {
- dev_err(&pdev->dev, "Error setting up callbacks\n");
- goto err_nomem2;
- }
-
- rc = request_threaded_irq(pdev->irq, mic_interrupt, mic_thread_fn,
- 0, "mic-msi", mdev);
- if (rc) {
- dev_err(&pdev->dev, "Error allocating MSI interrupt\n");
- goto err_irq_req_fail;
- }
-
- dev_dbg(&pdev->dev, "%d MSI irqs setup\n", mdev->irq_info.num_vectors);
- return 0;
-err_irq_req_fail:
- mic_release_callbacks(mdev);
-err_nomem2:
- kfree(mdev->irq_info.mic_msi_map);
-err_nomem1:
- pci_disable_msi(pdev);
- mdev->irq_info.num_vectors = 0;
- return rc;
-}
-
-/**
- * mic_setup_intx - Initializes legacy interrupts.
- *
- * @mdev: pointer to mic_device instance
- * @pdev: PCI device structure
- *
- * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
- */
-static int mic_setup_intx(struct mic_device *mdev, struct pci_dev *pdev)
-{
- int rc;
-
- /* Enable intx */
- pci_intx(pdev, 1);
- rc = mic_setup_callbacks(mdev);
- if (rc) {
- dev_err(&pdev->dev, "Error setting up callbacks\n");
- goto err_nomem;
- }
-
- rc = request_threaded_irq(pdev->irq, mic_interrupt, mic_thread_fn,
- IRQF_SHARED, "mic-intx", mdev);
- if (rc)
- goto err;
-
- dev_dbg(&pdev->dev, "intx irq setup\n");
- return 0;
-err:
- mic_release_callbacks(mdev);
-err_nomem:
- return rc;
-}
-
-/**
- * mic_next_db - Retrieve the next doorbell interrupt source id.
- * The id is picked sequentially from the available pool of
- * doorlbell ids.
- *
- * @mdev: pointer to the mic_device instance.
- *
- * Returns the next doorbell interrupt source.
- */
-int mic_next_db(struct mic_device *mdev)
-{
- int next_db;
-
- next_db = mdev->irq_info.next_avail_src %
- mdev->intr_info->intr_len[MIC_INTR_DB];
- mdev->irq_info.next_avail_src++;
- return next_db;
-}
-
-#define COOKIE_ID_SHIFT 16
-#define GET_ENTRY(cookie) ((cookie) & 0xFFFF)
-#define GET_OFFSET(cookie) ((cookie) >> COOKIE_ID_SHIFT)
-#define MK_COOKIE(x, y) ((x) | (y) << COOKIE_ID_SHIFT)
-
-/**
- * mic_request_threaded_irq - request an irq. mic_mutex needs
- * to be held before calling this function.
- *
- * @mdev: pointer to mic_device instance
- * @handler: The callback function that handles the interrupt.
- * The function needs to call ack_interrupts
- * (mdev->ops->ack_interrupt(mdev)) when handling the interrupts.
- * @thread_fn: thread fn required by request_threaded_irq.
- * @name: The ASCII name of the callee requesting the irq.
- * @data: private data that is returned back when calling the
- * function handler.
- * @intr_src: The source id of the requester. Its the doorbell id
- * for Doorbell interrupts and DMA channel id for DMA interrupts.
- * @type: The type of interrupt. Values defined in mic_intr_type
- *
- * returns: The cookie that is transparent to the caller. Passed
- * back when calling mic_free_irq. An appropriate error code
- * is returned on failure. Caller needs to use IS_ERR(return_val)
- * to check for failure and PTR_ERR(return_val) to obtained the
- * error code.
- *
- */
-struct mic_irq *
-mic_request_threaded_irq(struct mic_device *mdev,
- irq_handler_t handler, irq_handler_t thread_fn,
- const char *name, void *data, int intr_src,
- enum mic_intr_type type)
-{
- u16 offset;
- int rc = 0;
- struct msix_entry *msix = NULL;
- unsigned long cookie = 0;
- u16 entry;
- struct mic_intr_cb *intr_cb;
- struct pci_dev *pdev = mdev->pdev;
-
- offset = mic_map_src_to_offset(mdev, intr_src, type);
- if (offset >= MIC_NUM_OFFSETS) {
- dev_err(&mdev->pdev->dev,
- "Error mapping index %d to a valid source id.\n",
- intr_src);
- rc = -EINVAL;
- goto err;
- }
-
- if (mdev->irq_info.num_vectors > 1) {
- msix = mic_get_available_vector(mdev);
- if (!msix) {
- dev_err(&mdev->pdev->dev,
- "No MSIx vectors available for use.\n");
- rc = -ENOSPC;
- goto err;
- }
-
- rc = request_threaded_irq(msix->vector, handler, thread_fn,
- 0, name, data);
- if (rc) {
- dev_dbg(&mdev->pdev->dev,
- "request irq failed rc = %d\n", rc);
- goto err;
- }
- entry = msix->entry;
- mdev->irq_info.mic_msi_map[entry] |= BIT(offset);
- mdev->intr_ops->program_msi_to_src_map(mdev,
- entry, offset, true);
- cookie = MK_COOKIE(entry, offset);
- dev_dbg(&mdev->pdev->dev, "irq: %d assigned for src: %d\n",
- msix->vector, intr_src);
- } else {
- intr_cb = mic_register_intr_callback(mdev, offset, handler,
- thread_fn, data);
- if (IS_ERR(intr_cb)) {
- dev_err(&mdev->pdev->dev,
- "No available callback entries for use\n");
- rc = PTR_ERR(intr_cb);
- goto err;
- }
-
- entry = 0;
- if (pci_dev_msi_enabled(pdev)) {
- mdev->irq_info.mic_msi_map[entry] |= (1 << offset);
- mdev->intr_ops->program_msi_to_src_map(mdev,
- entry, offset, true);
- }
- cookie = MK_COOKIE(entry, intr_cb->cb_id);
- dev_dbg(&mdev->pdev->dev, "callback %d registered for src: %d\n",
- intr_cb->cb_id, intr_src);
- }
- return (struct mic_irq *)cookie;
-err:
- return ERR_PTR(rc);
-}
-
-/**
- * mic_free_irq - free irq. mic_mutex
- * needs to be held before calling this function.
- *
- * @mdev: pointer to mic_device instance
- * @cookie: cookie obtained during a successful call to mic_request_threaded_irq
- * @data: private data specified by the calling function during the
- * mic_request_threaded_irq
- *
- * returns: none.
- */
-void mic_free_irq(struct mic_device *mdev,
- struct mic_irq *cookie, void *data)
-{
- u32 offset;
- u32 entry;
- u8 src_id;
- unsigned int irq;
- struct pci_dev *pdev = mdev->pdev;
-
- entry = GET_ENTRY((unsigned long)cookie);
- offset = GET_OFFSET((unsigned long)cookie);
- if (mdev->irq_info.num_vectors > 1) {
- if (entry >= mdev->irq_info.num_vectors) {
- dev_warn(&mdev->pdev->dev,
- "entry %d should be < num_irq %d\n",
- entry, mdev->irq_info.num_vectors);
- return;
- }
- irq = mdev->irq_info.msix_entries[entry].vector;
- free_irq(irq, data);
- mdev->irq_info.mic_msi_map[entry] &= ~(BIT(offset));
- mdev->intr_ops->program_msi_to_src_map(mdev,
- entry, offset, false);
-
- dev_dbg(&mdev->pdev->dev, "irq: %d freed\n", irq);
- } else {
- irq = pdev->irq;
- src_id = mic_unregister_intr_callback(mdev, offset);
- if (src_id >= MIC_NUM_OFFSETS) {
- dev_warn(&mdev->pdev->dev, "Error unregistering callback\n");
- return;
- }
- if (pci_dev_msi_enabled(pdev)) {
- mdev->irq_info.mic_msi_map[entry] &= ~(BIT(src_id));
- mdev->intr_ops->program_msi_to_src_map(mdev,
- entry, src_id, false);
- }
- dev_dbg(&mdev->pdev->dev, "callback %d unregistered for src: %d\n",
- offset, src_id);
- }
-}
-
-/**
- * mic_setup_interrupts - Initializes interrupts.
- *
- * @mdev: pointer to mic_device instance
- * @pdev: PCI device structure
- *
- * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
- */
-int mic_setup_interrupts(struct mic_device *mdev, struct pci_dev *pdev)
-{
- int rc;
-
- rc = mic_setup_msix(mdev, pdev);
- if (!rc)
- goto done;
-
- rc = mic_setup_msi(mdev, pdev);
- if (!rc)
- goto done;
-
- rc = mic_setup_intx(mdev, pdev);
- if (rc) {
- dev_err(&mdev->pdev->dev, "no usable interrupts\n");
- return rc;
- }
-done:
- mdev->intr_ops->enable_interrupts(mdev);
- return 0;
-}
-
-/**
- * mic_free_interrupts - Frees interrupts setup by mic_setup_interrupts
- *
- * @mdev: pointer to mic_device instance
- * @pdev: PCI device structure
- *
- * returns none.
- */
-void mic_free_interrupts(struct mic_device *mdev, struct pci_dev *pdev)
-{
- int i;
-
- mdev->intr_ops->disable_interrupts(mdev);
- if (mdev->irq_info.num_vectors > 1) {
- for (i = 0; i < mdev->irq_info.num_vectors; i++) {
- if (mdev->irq_info.mic_msi_map[i])
- dev_warn(&pdev->dev, "irq %d may still be in use.\n",
- mdev->irq_info.msix_entries[i].vector);
- }
- kfree(mdev->irq_info.mic_msi_map);
- kfree(mdev->irq_info.msix_entries);
- pci_disable_msix(pdev);
- } else {
- if (pci_dev_msi_enabled(pdev)) {
- free_irq(pdev->irq, mdev);
- kfree(mdev->irq_info.mic_msi_map);
- pci_disable_msi(pdev);
- } else {
- free_irq(pdev->irq, mdev);
- }
- mic_release_callbacks(mdev);
- }
-}
-
-/**
- * mic_intr_restore - Restore MIC interrupt registers.
- *
- * @mdev: pointer to mic_device instance.
- *
- * Restore the interrupt registers to values previously
- * stored in the SW data structures. mic_mutex needs to
- * be held before calling this function.
- *
- * returns None.
- */
-void mic_intr_restore(struct mic_device *mdev)
-{
- int entry, offset;
- struct pci_dev *pdev = mdev->pdev;
-
- if (!pci_dev_msi_enabled(pdev))
- return;
-
- for (entry = 0; entry < mdev->irq_info.num_vectors; entry++) {
- for (offset = 0; offset < MIC_NUM_OFFSETS; offset++) {
- if (mdev->irq_info.mic_msi_map[entry] & BIT(offset))
- mdev->intr_ops->program_msi_to_src_map(mdev,
- entry, offset, true);
- }
- }
-}
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Intel MIC Host driver.
- */
-#ifndef _MIC_INTR_H_
-#define _MIC_INTR_H_
-
-#include <linux/bitops.h>
-#include <linux/interrupt.h>
-/*
- * The minimum number of msix vectors required for normal operation.
- * 3 for virtio network, console and block devices.
- * 1 for card shutdown notifications.
- * 4 for host owned DMA channels.
- * 1 for SCIF
- */
-#define MIC_MIN_MSIX 9
-#define MIC_NUM_OFFSETS 32
-
-/**
- * mic_intr_source - The type of source that will generate
- * the interrupt.The number of types needs to be in sync with
- * MIC_NUM_INTR_TYPES
- *
- * MIC_INTR_DB: The source is a doorbell
- * MIC_INTR_DMA: The source is a DMA channel
- * MIC_INTR_ERR: The source is an error interrupt e.g. SBOX ERR
- * MIC_NUM_INTR_TYPES: Total number of interrupt sources.
- */
-enum mic_intr_type {
- MIC_INTR_DB = 0,
- MIC_INTR_DMA,
- MIC_INTR_ERR,
- MIC_NUM_INTR_TYPES
-};
-
-/**
- * struct mic_intr_info - Contains h/w specific interrupt sources
- * information.
- *
- * @intr_start_idx: Contains the starting indexes of the
- * interrupt types.
- * @intr_len: Contains the length of the interrupt types.
- */
-struct mic_intr_info {
- u16 intr_start_idx[MIC_NUM_INTR_TYPES];
- u16 intr_len[MIC_NUM_INTR_TYPES];
-};
-
-/**
- * struct mic_irq_info - OS specific irq information
- *
- * @next_avail_src: next available doorbell that can be assigned.
- * @msix_entries: msix entries allocated while setting up MSI-x
- * @mic_msi_map: The MSI/MSI-x mapping information.
- * @num_vectors: The number of MSI/MSI-x vectors that have been allocated.
- * @cb_ida: callback ID allocator to track the callbacks registered.
- * @mic_intr_lock: spinlock to protect the interrupt callback list.
- * @mic_thread_lock: spinlock to protect the thread callback list.
- * This lock is used to protect against thread_fn while
- * mic_intr_lock is used to protect against interrupt handler.
- * @cb_list: Array of callback lists one for each source.
- * @mask: Mask used by the main thread fn to call the underlying thread fns.
- */
-struct mic_irq_info {
- int next_avail_src;
- struct msix_entry *msix_entries;
- u32 *mic_msi_map;
- u16 num_vectors;
- struct ida cb_ida;
- spinlock_t mic_intr_lock;
- spinlock_t mic_thread_lock;
- struct list_head *cb_list;
- unsigned long mask;
-};
-
-/**
- * struct mic_intr_cb - Interrupt callback structure.
- *
- * @handler: The callback function
- * @thread_fn: The thread_fn.
- * @data: Private data of the requester.
- * @cb_id: The callback id. Identifies this callback.
- * @list: list head pointing to the next callback structure.
- */
-struct mic_intr_cb {
- irq_handler_t handler;
- irq_handler_t thread_fn;
- void *data;
- int cb_id;
- struct list_head list;
-};
-
-/**
- * struct mic_irq - opaque pointer used as cookie
- */
-struct mic_irq;
-
-/* Forward declaration */
-struct mic_device;
-
-/**
- * struct mic_hw_intr_ops: MIC HW specific interrupt operations
- * @intr_init: Initialize H/W specific interrupt information.
- * @enable_interrupts: Enable interrupts from the hardware.
- * @disable_interrupts: Disable interrupts from the hardware.
- * @program_msi_to_src_map: Update MSI mapping registers with
- * irq information.
- * @read_msi_to_src_map: Read MSI mapping registers containing
- * irq information.
- */
-struct mic_hw_intr_ops {
- void (*intr_init)(struct mic_device *mdev);
- void (*enable_interrupts)(struct mic_device *mdev);
- void (*disable_interrupts)(struct mic_device *mdev);
- void (*program_msi_to_src_map) (struct mic_device *mdev,
- int idx, int intr_src, bool set);
- u32 (*read_msi_to_src_map) (struct mic_device *mdev,
- int idx);
-};
-
-int mic_next_db(struct mic_device *mdev);
-struct mic_irq *
-mic_request_threaded_irq(struct mic_device *mdev,
- irq_handler_t handler, irq_handler_t thread_fn,
- const char *name, void *data, int intr_src,
- enum mic_intr_type type);
-void mic_free_irq(struct mic_device *mdev,
- struct mic_irq *cookie, void *data);
-int mic_setup_interrupts(struct mic_device *mdev, struct pci_dev *pdev);
-void mic_free_interrupts(struct mic_device *mdev, struct pci_dev *pdev);
-void mic_intr_restore(struct mic_device *mdev);
-#endif
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Intel MIC Host driver.
- */
-#include <linux/fs.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/poll.h>
-
-#include <linux/mic_common.h>
-#include "../common/mic_dev.h"
-#include "mic_device.h"
-#include "mic_x100.h"
-#include "mic_smpt.h"
-
-static const char mic_driver_name[] = "mic";
-
-static const struct pci_device_id mic_pci_tbl[] = {
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2250)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2251)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2252)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2253)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2254)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2255)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2256)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2257)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2258)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2259)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225a)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225b)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225c)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225d)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225e)},
-
- /* required last entry */
- { 0, }
-};
-
-MODULE_DEVICE_TABLE(pci, mic_pci_tbl);
-
-/* ID allocator for MIC devices */
-static struct ida g_mic_ida;
-
-/* Initialize the device page */
-static int mic_dp_init(struct mic_device *mdev)
-{
- mdev->dp = kzalloc(MIC_DP_SIZE, GFP_KERNEL);
- if (!mdev->dp)
- return -ENOMEM;
-
- mdev->dp_dma_addr = mic_map_single(mdev,
- mdev->dp, MIC_DP_SIZE);
- if (mic_map_error(mdev->dp_dma_addr)) {
- kfree(mdev->dp);
- dev_err(&mdev->pdev->dev, "%s %d err %d\n",
- __func__, __LINE__, -ENOMEM);
- return -ENOMEM;
- }
- mdev->ops->write_spad(mdev, MIC_DPLO_SPAD, mdev->dp_dma_addr);
- mdev->ops->write_spad(mdev, MIC_DPHI_SPAD, mdev->dp_dma_addr >> 32);
- return 0;
-}
-
-/* Uninitialize the device page */
-static void mic_dp_uninit(struct mic_device *mdev)
-{
- mic_unmap_single(mdev, mdev->dp_dma_addr, MIC_DP_SIZE);
- kfree(mdev->dp);
-}
-
-/**
- * mic_ops_init: Initialize HW specific operation tables.
- *
- * @mdev: pointer to mic_device instance
- *
- * returns none.
- */
-static void mic_ops_init(struct mic_device *mdev)
-{
- switch (mdev->family) {
- case MIC_FAMILY_X100:
- mdev->ops = &mic_x100_ops;
- mdev->intr_ops = &mic_x100_intr_ops;
- mdev->smpt_ops = &mic_x100_smpt_ops;
- break;
- default:
- break;
- }
-}
-
-/**
- * mic_get_family - Determine hardware family to which this MIC belongs.
- *
- * @pdev: The pci device structure
- *
- * returns family.
- */
-static enum mic_hw_family mic_get_family(struct pci_dev *pdev)
-{
- enum mic_hw_family family;
-
- switch (pdev->device) {
- case MIC_X100_PCI_DEVICE_2250:
- case MIC_X100_PCI_DEVICE_2251:
- case MIC_X100_PCI_DEVICE_2252:
- case MIC_X100_PCI_DEVICE_2253:
- case MIC_X100_PCI_DEVICE_2254:
- case MIC_X100_PCI_DEVICE_2255:
- case MIC_X100_PCI_DEVICE_2256:
- case MIC_X100_PCI_DEVICE_2257:
- case MIC_X100_PCI_DEVICE_2258:
- case MIC_X100_PCI_DEVICE_2259:
- case MIC_X100_PCI_DEVICE_225a:
- case MIC_X100_PCI_DEVICE_225b:
- case MIC_X100_PCI_DEVICE_225c:
- case MIC_X100_PCI_DEVICE_225d:
- case MIC_X100_PCI_DEVICE_225e:
- family = MIC_FAMILY_X100;
- break;
- default:
- family = MIC_FAMILY_UNKNOWN;
- break;
- }
- return family;
-}
-
-/**
- * mic_device_init - Allocates and initializes the MIC device structure
- *
- * @mdev: pointer to mic_device instance
- * @pdev: The pci device structure
- *
- * returns none.
- */
-static void
-mic_device_init(struct mic_device *mdev, struct pci_dev *pdev)
-{
- mdev->pdev = pdev;
- mdev->family = mic_get_family(pdev);
- mdev->stepping = pdev->revision;
- mic_ops_init(mdev);
- mutex_init(&mdev->mic_mutex);
- mdev->irq_info.next_avail_src = 0;
-}
-
-/**
- * mic_probe - Device Initialization Routine
- *
- * @pdev: PCI device structure
- * @ent: entry in mic_pci_tbl
- *
- * returns 0 on success, < 0 on failure.
- */
-static int mic_probe(struct pci_dev *pdev,
- const struct pci_device_id *ent)
-{
- int rc;
- struct mic_device *mdev;
-
- mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
- if (!mdev) {
- rc = -ENOMEM;
- goto mdev_alloc_fail;
- }
- mdev->id = ida_simple_get(&g_mic_ida, 0, MIC_MAX_NUM_DEVS, GFP_KERNEL);
- if (mdev->id < 0) {
- rc = mdev->id;
- dev_err(&pdev->dev, "ida_simple_get failed rc %d\n", rc);
- goto ida_fail;
- }
-
- mic_device_init(mdev, pdev);
-
- rc = pci_enable_device(pdev);
- if (rc) {
- dev_err(&pdev->dev, "failed to enable pci device.\n");
- goto ida_remove;
- }
-
- pci_set_master(pdev);
-
- rc = pci_request_regions(pdev, mic_driver_name);
- if (rc) {
- dev_err(&pdev->dev, "failed to get pci regions.\n");
- goto disable_device;
- }
-
- rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
- if (rc) {
- dev_err(&pdev->dev, "Cannot set DMA mask\n");
- goto release_regions;
- }
-
- mdev->mmio.pa = pci_resource_start(pdev, mdev->ops->mmio_bar);
- mdev->mmio.len = pci_resource_len(pdev, mdev->ops->mmio_bar);
- mdev->mmio.va = pci_ioremap_bar(pdev, mdev->ops->mmio_bar);
- if (!mdev->mmio.va) {
- dev_err(&pdev->dev, "Cannot remap MMIO BAR\n");
- rc = -EIO;
- goto release_regions;
- }
-
- mdev->aper.pa = pci_resource_start(pdev, mdev->ops->aper_bar);
- mdev->aper.len = pci_resource_len(pdev, mdev->ops->aper_bar);
- mdev->aper.va = ioremap_wc(mdev->aper.pa, mdev->aper.len);
- if (!mdev->aper.va) {
- dev_err(&pdev->dev, "Cannot remap Aperture BAR\n");
- rc = -EIO;
- goto unmap_mmio;
- }
-
- mdev->intr_ops->intr_init(mdev);
- rc = mic_setup_interrupts(mdev, pdev);
- if (rc) {
- dev_err(&pdev->dev, "mic_setup_interrupts failed %d\n", rc);
- goto unmap_aper;
- }
- rc = mic_smpt_init(mdev);
- if (rc) {
- dev_err(&pdev->dev, "smpt_init failed %d\n", rc);
- goto free_interrupts;
- }
-
- pci_set_drvdata(pdev, mdev);
-
- rc = mic_dp_init(mdev);
- if (rc) {
- dev_err(&pdev->dev, "mic_dp_init failed rc %d\n", rc);
- goto smpt_uninit;
- }
- mic_bootparam_init(mdev);
- mic_create_debug_dir(mdev);
-
- mdev->cosm_dev = cosm_register_device(&mdev->pdev->dev, &cosm_hw_ops);
- if (IS_ERR(mdev->cosm_dev)) {
- rc = PTR_ERR(mdev->cosm_dev);
- dev_err(&pdev->dev, "cosm_add_device failed rc %d\n", rc);
- goto cleanup_debug_dir;
- }
- return 0;
-cleanup_debug_dir:
- mic_delete_debug_dir(mdev);
- mic_dp_uninit(mdev);
-smpt_uninit:
- mic_smpt_uninit(mdev);
-free_interrupts:
- mic_free_interrupts(mdev, pdev);
-unmap_aper:
- iounmap(mdev->aper.va);
-unmap_mmio:
- iounmap(mdev->mmio.va);
-release_regions:
- pci_release_regions(pdev);
-disable_device:
- pci_disable_device(pdev);
-ida_remove:
- ida_simple_remove(&g_mic_ida, mdev->id);
-ida_fail:
- kfree(mdev);
-mdev_alloc_fail:
- dev_err(&pdev->dev, "Probe failed rc %d\n", rc);
- return rc;
-}
-
-/**
- * mic_remove - Device Removal Routine
- * mic_remove is called by the PCI subsystem to alert the driver
- * that it should release a PCI device.
- *
- * @pdev: PCI device structure
- */
-static void mic_remove(struct pci_dev *pdev)
-{
- struct mic_device *mdev;
-
- mdev = pci_get_drvdata(pdev);
- if (!mdev)
- return;
-
- cosm_unregister_device(mdev->cosm_dev);
- mic_delete_debug_dir(mdev);
- mic_dp_uninit(mdev);
- mic_smpt_uninit(mdev);
- mic_free_interrupts(mdev, pdev);
- iounmap(mdev->aper.va);
- iounmap(mdev->mmio.va);
- pci_release_regions(pdev);
- pci_disable_device(pdev);
- ida_simple_remove(&g_mic_ida, mdev->id);
- kfree(mdev);
-}
-
-static struct pci_driver mic_driver = {
- .name = mic_driver_name,
- .id_table = mic_pci_tbl,
- .probe = mic_probe,
- .remove = mic_remove
-};
-
-static int __init mic_init(void)
-{
- int ret;
-
- request_module("mic_x100_dma");
- mic_init_debugfs();
- ida_init(&g_mic_ida);
- ret = pci_register_driver(&mic_driver);
- if (ret) {
- pr_err("pci_register_driver failed ret %d\n", ret);
- goto cleanup_debugfs;
- }
- return 0;
-cleanup_debugfs:
- ida_destroy(&g_mic_ida);
- mic_exit_debugfs();
- return ret;
-}
-
-static void __exit mic_exit(void)
-{
- pci_unregister_driver(&mic_driver);
- ida_destroy(&g_mic_ida);
- mic_exit_debugfs();
-}
-
-module_init(mic_init);
-module_exit(mic_exit);
-
-MODULE_AUTHOR("Intel Corporation");
-MODULE_DESCRIPTION("Intel(R) MIC X100 Host driver");
-MODULE_LICENSE("GPL v2");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Intel MIC Host driver.
- */
-#include <linux/pci.h>
-
-#include "../common/mic_dev.h"
-#include "mic_device.h"
-#include "mic_smpt.h"
-
-static inline u64 mic_system_page_mask(struct mic_device *mdev)
-{
- return (1ULL << mdev->smpt->info.page_shift) - 1ULL;
-}
-
-static inline u8 mic_sys_addr_to_smpt(struct mic_device *mdev, dma_addr_t pa)
-{
- return (pa - mdev->smpt->info.base) >> mdev->smpt->info.page_shift;
-}
-
-static inline u64 mic_smpt_to_pa(struct mic_device *mdev, u8 index)
-{
- return mdev->smpt->info.base + (index * mdev->smpt->info.page_size);
-}
-
-static inline u64 mic_smpt_offset(struct mic_device *mdev, dma_addr_t pa)
-{
- return pa & mic_system_page_mask(mdev);
-}
-
-static inline u64 mic_smpt_align_low(struct mic_device *mdev, dma_addr_t pa)
-{
- return ALIGN(pa - mic_system_page_mask(mdev),
- mdev->smpt->info.page_size);
-}
-
-static inline u64 mic_smpt_align_high(struct mic_device *mdev, dma_addr_t pa)
-{
- return ALIGN(pa, mdev->smpt->info.page_size);
-}
-
-/* Total Cumulative system memory accessible by MIC across all SMPT entries */
-static inline u64 mic_max_system_memory(struct mic_device *mdev)
-{
- return mdev->smpt->info.num_reg * mdev->smpt->info.page_size;
-}
-
-/* Maximum system memory address accessible by MIC */
-static inline u64 mic_max_system_addr(struct mic_device *mdev)
-{
- return mdev->smpt->info.base + mic_max_system_memory(mdev) - 1ULL;
-}
-
-/* Check if the DMA address is a MIC system memory address */
-static inline bool
-mic_is_system_addr(struct mic_device *mdev, dma_addr_t pa)
-{
- return pa >= mdev->smpt->info.base && pa <= mic_max_system_addr(mdev);
-}
-
-/* Populate an SMPT entry and update the reference counts. */
-static void mic_add_smpt_entry(int spt, s64 *ref, u64 addr,
- int entries, struct mic_device *mdev)
-{
- struct mic_smpt_info *smpt_info = mdev->smpt;
- int i;
-
- for (i = spt; i < spt + entries; i++,
- addr += smpt_info->info.page_size) {
- if (!smpt_info->entry[i].ref_count &&
- (smpt_info->entry[i].dma_addr != addr)) {
- mdev->smpt_ops->set(mdev, addr, i);
- smpt_info->entry[i].dma_addr = addr;
- }
- smpt_info->entry[i].ref_count += ref[i - spt];
- }
-}
-
-/*
- * Find an available MIC address in MIC SMPT address space
- * for a given DMA address and size.
- */
-static dma_addr_t mic_smpt_op(struct mic_device *mdev, u64 dma_addr,
- int entries, s64 *ref, size_t size)
-{
- int spt;
- int ae = 0;
- int i;
- unsigned long flags;
- dma_addr_t mic_addr = 0;
- dma_addr_t addr = dma_addr;
- struct mic_smpt_info *smpt_info = mdev->smpt;
-
- spin_lock_irqsave(&smpt_info->smpt_lock, flags);
-
- /* find existing entries */
- for (i = 0; i < smpt_info->info.num_reg; i++) {
- if (smpt_info->entry[i].dma_addr == addr) {
- ae++;
- addr += smpt_info->info.page_size;
- } else if (ae) /* cannot find contiguous entries */
- goto not_found;
-
- if (ae == entries)
- goto found;
- }
-
- /* find free entry */
- for (ae = 0, i = 0; i < smpt_info->info.num_reg; i++) {
- ae = (smpt_info->entry[i].ref_count == 0) ? ae + 1 : 0;
- if (ae == entries)
- goto found;
- }
-
-not_found:
- spin_unlock_irqrestore(&smpt_info->smpt_lock, flags);
- return mic_addr;
-
-found:
- spt = i - entries + 1;
- mic_addr = mic_smpt_to_pa(mdev, spt);
- mic_add_smpt_entry(spt, ref, dma_addr, entries, mdev);
- smpt_info->map_count++;
- smpt_info->ref_count += (s64)size;
- spin_unlock_irqrestore(&smpt_info->smpt_lock, flags);
- return mic_addr;
-}
-
-/*
- * Returns number of smpt entries needed for dma_addr to dma_addr + size
- * also returns the reference count array for each of those entries
- * and the starting smpt address
- */
-static int mic_get_smpt_ref_count(struct mic_device *mdev, dma_addr_t dma_addr,
- size_t size, s64 *ref, u64 *smpt_start)
-{
- u64 start = dma_addr;
- u64 end = dma_addr + size;
- int i = 0;
-
- while (start < end) {
- ref[i++] = min(mic_smpt_align_high(mdev, start + 1),
- end) - start;
- start = mic_smpt_align_high(mdev, start + 1);
- }
-
- if (smpt_start)
- *smpt_start = mic_smpt_align_low(mdev, dma_addr);
-
- return i;
-}
-
-/*
- * mic_to_dma_addr - Converts a MIC address to a DMA address.
- *
- * @mdev: pointer to mic_device instance.
- * @mic_addr: MIC address.
- *
- * returns a DMA address.
- */
-dma_addr_t mic_to_dma_addr(struct mic_device *mdev, dma_addr_t mic_addr)
-{
- struct mic_smpt_info *smpt_info = mdev->smpt;
- int spt;
- dma_addr_t dma_addr;
-
- if (!mic_is_system_addr(mdev, mic_addr)) {
- dev_err(&mdev->pdev->dev,
- "mic_addr is invalid. mic_addr = 0x%llx\n", mic_addr);
- return -EINVAL;
- }
- spt = mic_sys_addr_to_smpt(mdev, mic_addr);
- dma_addr = smpt_info->entry[spt].dma_addr +
- mic_smpt_offset(mdev, mic_addr);
- return dma_addr;
-}
-
-/**
- * mic_map - Maps a DMA address to a MIC physical address.
- *
- * @mdev: pointer to mic_device instance.
- * @dma_addr: DMA address.
- * @size: Size of the region to be mapped.
- *
- * This API converts the DMA address provided to a DMA address understood
- * by MIC. Caller should check for errors by calling mic_map_error(..).
- *
- * returns DMA address as required by MIC.
- */
-dma_addr_t mic_map(struct mic_device *mdev, dma_addr_t dma_addr, size_t size)
-{
- dma_addr_t mic_addr = 0;
- int num_entries;
- s64 *ref;
- u64 smpt_start;
-
- if (!size || size > mic_max_system_memory(mdev))
- return mic_addr;
-
- ref = kmalloc_array(mdev->smpt->info.num_reg, sizeof(s64), GFP_ATOMIC);
- if (!ref)
- return mic_addr;
-
- num_entries = mic_get_smpt_ref_count(mdev, dma_addr, size,
- ref, &smpt_start);
-
- /* Set the smpt table appropriately and get 16G aligned mic address */
- mic_addr = mic_smpt_op(mdev, smpt_start, num_entries, ref, size);
-
- kfree(ref);
-
- /*
- * If mic_addr is zero then its an error case
- * since mic_addr can never be zero.
- * else generate mic_addr by adding the 16G offset in dma_addr
- */
- if (!mic_addr && MIC_FAMILY_X100 == mdev->family) {
- dev_err(&mdev->pdev->dev,
- "mic_map failed dma_addr 0x%llx size 0x%lx\n",
- dma_addr, size);
- return mic_addr;
- } else {
- return mic_addr + mic_smpt_offset(mdev, dma_addr);
- }
-}
-
-/**
- * mic_unmap - Unmaps a MIC physical address.
- *
- * @mdev: pointer to mic_device instance.
- * @mic_addr: MIC physical address.
- * @size: Size of the region to be unmapped.
- *
- * This API unmaps the mappings created by mic_map(..).
- *
- * returns None.
- */
-void mic_unmap(struct mic_device *mdev, dma_addr_t mic_addr, size_t size)
-{
- struct mic_smpt_info *smpt_info = mdev->smpt;
- s64 *ref;
- int num_smpt;
- int spt;
- int i;
- unsigned long flags;
-
- if (!size)
- return;
-
- if (!mic_is_system_addr(mdev, mic_addr)) {
- dev_err(&mdev->pdev->dev,
- "invalid address: 0x%llx\n", mic_addr);
- return;
- }
-
- spt = mic_sys_addr_to_smpt(mdev, mic_addr);
- ref = kmalloc_array(mdev->smpt->info.num_reg, sizeof(s64), GFP_ATOMIC);
- if (!ref)
- return;
-
- /* Get number of smpt entries to be mapped, ref count array */
- num_smpt = mic_get_smpt_ref_count(mdev, mic_addr, size, ref, NULL);
-
- spin_lock_irqsave(&smpt_info->smpt_lock, flags);
- smpt_info->unmap_count++;
- smpt_info->ref_count -= (s64)size;
-
- for (i = spt; i < spt + num_smpt; i++) {
- smpt_info->entry[i].ref_count -= ref[i - spt];
- if (smpt_info->entry[i].ref_count < 0)
- dev_warn(&mdev->pdev->dev,
- "ref count for entry %d is negative\n", i);
- }
- spin_unlock_irqrestore(&smpt_info->smpt_lock, flags);
- kfree(ref);
-}
-
-/**
- * mic_map_single - Maps a virtual address to a MIC physical address.
- *
- * @mdev: pointer to mic_device instance.
- * @va: Kernel direct mapped virtual address.
- * @size: Size of the region to be mapped.
- *
- * This API calls pci_map_single(..) for the direct mapped virtual address
- * and then converts the DMA address provided to a DMA address understood
- * by MIC. Caller should check for errors by calling mic_map_error(..).
- *
- * returns DMA address as required by MIC.
- */
-dma_addr_t mic_map_single(struct mic_device *mdev, void *va, size_t size)
-{
- dma_addr_t mic_addr = 0;
- struct pci_dev *pdev = mdev->pdev;
- dma_addr_t dma_addr =
- pci_map_single(pdev, va, size, PCI_DMA_BIDIRECTIONAL);
-
- if (!pci_dma_mapping_error(pdev, dma_addr)) {
- mic_addr = mic_map(mdev, dma_addr, size);
- if (!mic_addr) {
- dev_err(&mdev->pdev->dev,
- "mic_map failed dma_addr 0x%llx size 0x%lx\n",
- dma_addr, size);
- pci_unmap_single(pdev, dma_addr,
- size, PCI_DMA_BIDIRECTIONAL);
- }
- }
- return mic_addr;
-}
-
-/**
- * mic_unmap_single - Unmaps a MIC physical address.
- *
- * @mdev: pointer to mic_device instance.
- * @mic_addr: MIC physical address.
- * @size: Size of the region to be unmapped.
- *
- * This API unmaps the mappings created by mic_map_single(..).
- *
- * returns None.
- */
-void
-mic_unmap_single(struct mic_device *mdev, dma_addr_t mic_addr, size_t size)
-{
- struct pci_dev *pdev = mdev->pdev;
- dma_addr_t dma_addr = mic_to_dma_addr(mdev, mic_addr);
- mic_unmap(mdev, mic_addr, size);
- pci_unmap_single(pdev, dma_addr, size, PCI_DMA_BIDIRECTIONAL);
-}
-
-/**
- * mic_smpt_init - Initialize MIC System Memory Page Tables.
- *
- * @mdev: pointer to mic_device instance.
- *
- * returns 0 for success and -errno for error.
- */
-int mic_smpt_init(struct mic_device *mdev)
-{
- int i, err = 0;
- dma_addr_t dma_addr;
- struct mic_smpt_info *smpt_info;
-
- mdev->smpt = kmalloc(sizeof(*mdev->smpt), GFP_KERNEL);
- if (!mdev->smpt)
- return -ENOMEM;
-
- smpt_info = mdev->smpt;
- mdev->smpt_ops->init(mdev);
- smpt_info->entry = kmalloc_array(smpt_info->info.num_reg,
- sizeof(*smpt_info->entry), GFP_KERNEL);
- if (!smpt_info->entry) {
- err = -ENOMEM;
- goto free_smpt;
- }
- spin_lock_init(&smpt_info->smpt_lock);
- for (i = 0; i < smpt_info->info.num_reg; i++) {
- dma_addr = i * smpt_info->info.page_size;
- smpt_info->entry[i].dma_addr = dma_addr;
- smpt_info->entry[i].ref_count = 0;
- mdev->smpt_ops->set(mdev, dma_addr, i);
- }
- smpt_info->ref_count = 0;
- smpt_info->map_count = 0;
- smpt_info->unmap_count = 0;
- return 0;
-free_smpt:
- kfree(smpt_info);
- return err;
-}
-
-/**
- * mic_smpt_uninit - UnInitialize MIC System Memory Page Tables.
- *
- * @mdev: pointer to mic_device instance.
- *
- * returns None.
- */
-void mic_smpt_uninit(struct mic_device *mdev)
-{
- struct mic_smpt_info *smpt_info = mdev->smpt;
- int i;
-
- dev_dbg(&mdev->pdev->dev,
- "nodeid %d SMPT ref count %lld map %lld unmap %lld\n",
- mdev->id, smpt_info->ref_count,
- smpt_info->map_count, smpt_info->unmap_count);
-
- for (i = 0; i < smpt_info->info.num_reg; i++) {
- dev_dbg(&mdev->pdev->dev,
- "SMPT entry[%d] dma_addr = 0x%llx ref_count = %lld\n",
- i, smpt_info->entry[i].dma_addr,
- smpt_info->entry[i].ref_count);
- if (smpt_info->entry[i].ref_count)
- dev_warn(&mdev->pdev->dev,
- "ref count for entry %d is not zero\n", i);
- }
- kfree(smpt_info->entry);
- kfree(smpt_info);
-}
-
-/**
- * mic_smpt_restore - Restore MIC System Memory Page Tables.
- *
- * @mdev: pointer to mic_device instance.
- *
- * Restore the SMPT registers to values previously stored in the
- * SW data structures. Some MIC steppings lose register state
- * across resets and this API should be called for performing
- * a restore operation if required.
- *
- * returns None.
- */
-void mic_smpt_restore(struct mic_device *mdev)
-{
- int i;
- dma_addr_t dma_addr;
-
- for (i = 0; i < mdev->smpt->info.num_reg; i++) {
- dma_addr = mdev->smpt->entry[i].dma_addr;
- mdev->smpt_ops->set(mdev, dma_addr, i);
- }
-}
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Intel MIC Host driver.
- */
-#ifndef MIC_SMPT_H
-#define MIC_SMPT_H
-/**
- * struct mic_smpt_ops - MIC HW specific SMPT operations.
- * @init: Initialize hardware specific SMPT information in mic_smpt_hw_info.
- * @set: Set the value for a particular SMPT entry.
- */
-struct mic_smpt_ops {
- void (*init)(struct mic_device *mdev);
- void (*set)(struct mic_device *mdev, dma_addr_t dma_addr, u8 index);
-};
-
-/**
- * struct mic_smpt - MIC SMPT entry information.
- * @dma_addr: Base DMA address for this SMPT entry.
- * @ref_count: Number of active mappings for this SMPT entry in bytes.
- */
-struct mic_smpt {
- dma_addr_t dma_addr;
- s64 ref_count;
-};
-
-/**
- * struct mic_smpt_hw_info - MIC SMPT hardware specific information.
- * @num_reg: Number of SMPT registers.
- * @page_shift: System memory page shift.
- * @page_size: System memory page size.
- * @base: System address base.
- */
-struct mic_smpt_hw_info {
- u8 num_reg;
- u8 page_shift;
- u64 page_size;
- u64 base;
-};
-
-/**
- * struct mic_smpt_info - MIC SMPT information.
- * @entry: Array of SMPT entries.
- * @smpt_lock: Spin lock protecting access to SMPT data structures.
- * @info: Hardware specific SMPT information.
- * @ref_count: Number of active SMPT mappings (for debug).
- * @map_count: Number of SMPT mappings created (for debug).
- * @unmap_count: Number of SMPT mappings destroyed (for debug).
- */
-struct mic_smpt_info {
- struct mic_smpt *entry;
- spinlock_t smpt_lock;
- struct mic_smpt_hw_info info;
- s64 ref_count;
- s64 map_count;
- s64 unmap_count;
-};
-
-dma_addr_t mic_map_single(struct mic_device *mdev, void *va, size_t size);
-void mic_unmap_single(struct mic_device *mdev,
- dma_addr_t mic_addr, size_t size);
-dma_addr_t mic_map(struct mic_device *mdev,
- dma_addr_t dma_addr, size_t size);
-void mic_unmap(struct mic_device *mdev, dma_addr_t mic_addr, size_t size);
-dma_addr_t mic_to_dma_addr(struct mic_device *mdev, dma_addr_t mic_addr);
-
-/**
- * mic_map_error - Check a MIC address for errors.
- *
- * @mdev: pointer to mic_device instance.
- *
- * returns Whether there was an error during mic_map..(..) APIs.
- */
-static inline bool mic_map_error(dma_addr_t mic_addr)
-{
- return !mic_addr;
-}
-
-int mic_smpt_init(struct mic_device *mdev);
-void mic_smpt_uninit(struct mic_device *mdev);
-void mic_smpt_restore(struct mic_device *mdev);
-
-#endif
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Intel MIC Host driver.
- */
-#include <linux/fs.h>
-#include <linux/pci.h>
-#include <linux/sched.h>
-#include <linux/firmware.h>
-#include <linux/delay.h>
-
-#include "../common/mic_dev.h"
-#include "mic_device.h"
-#include "mic_x100.h"
-#include "mic_smpt.h"
-
-static const u16 mic_x100_intr_init[] = {
- MIC_X100_DOORBELL_IDX_START,
- MIC_X100_DMA_IDX_START,
- MIC_X100_ERR_IDX_START,
- MIC_X100_NUM_DOORBELL,
- MIC_X100_NUM_DMA,
- MIC_X100_NUM_ERR,
-};
-
-/**
- * mic_x100_write_spad - write to the scratchpad register
- * @mdev: pointer to mic_device instance
- * @idx: index to the scratchpad register, 0 based
- * @val: the data value to put into the register
- *
- * This function allows writing of a 32bit value to the indexed scratchpad
- * register.
- *
- * RETURNS: none.
- */
-static void
-mic_x100_write_spad(struct mic_device *mdev, unsigned int idx, u32 val)
-{
- dev_dbg(&mdev->pdev->dev, "Writing 0x%x to scratch pad index %d\n",
- val, idx);
- mic_mmio_write(&mdev->mmio, val,
- MIC_X100_SBOX_BASE_ADDRESS +
- MIC_X100_SBOX_SPAD0 + idx * 4);
-}
-
-/**
- * mic_x100_read_spad - read from the scratchpad register
- * @mdev: pointer to mic_device instance
- * @idx: index to scratchpad register, 0 based
- *
- * This function allows reading of the 32bit scratchpad register.
- *
- * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
- */
-static u32
-mic_x100_read_spad(struct mic_device *mdev, unsigned int idx)
-{
- u32 val = mic_mmio_read(&mdev->mmio,
- MIC_X100_SBOX_BASE_ADDRESS +
- MIC_X100_SBOX_SPAD0 + idx * 4);
-
- dev_dbg(&mdev->pdev->dev,
- "Reading 0x%x from scratch pad index %d\n", val, idx);
- return val;
-}
-
-/**
- * mic_x100_enable_interrupts - Enable interrupts.
- * @mdev: pointer to mic_device instance
- */
-static void mic_x100_enable_interrupts(struct mic_device *mdev)
-{
- u32 reg;
- struct mic_mw *mw = &mdev->mmio;
- u32 sice0 = MIC_X100_SBOX_BASE_ADDRESS + MIC_X100_SBOX_SICE0;
- u32 siac0 = MIC_X100_SBOX_BASE_ADDRESS + MIC_X100_SBOX_SIAC0;
-
- reg = mic_mmio_read(mw, sice0);
- reg |= MIC_X100_SBOX_DBR_BITS(0xf) | MIC_X100_SBOX_DMA_BITS(0xff);
- mic_mmio_write(mw, reg, sice0);
-
- /*
- * Enable auto-clear when enabling interrupts. Applicable only for
- * MSI-x. Legacy and MSI mode cannot have auto-clear enabled.
- */
- if (mdev->irq_info.num_vectors > 1) {
- reg = mic_mmio_read(mw, siac0);
- reg |= MIC_X100_SBOX_DBR_BITS(0xf) |
- MIC_X100_SBOX_DMA_BITS(0xff);
- mic_mmio_write(mw, reg, siac0);
- }
-}
-
-/**
- * mic_x100_disable_interrupts - Disable interrupts.
- * @mdev: pointer to mic_device instance
- */
-static void mic_x100_disable_interrupts(struct mic_device *mdev)
-{
- u32 reg;
- struct mic_mw *mw = &mdev->mmio;
- u32 sice0 = MIC_X100_SBOX_BASE_ADDRESS + MIC_X100_SBOX_SICE0;
- u32 siac0 = MIC_X100_SBOX_BASE_ADDRESS + MIC_X100_SBOX_SIAC0;
- u32 sicc0 = MIC_X100_SBOX_BASE_ADDRESS + MIC_X100_SBOX_SICC0;
-
- reg = mic_mmio_read(mw, sice0);
- mic_mmio_write(mw, reg, sicc0);
-
- if (mdev->irq_info.num_vectors > 1) {
- reg = mic_mmio_read(mw, siac0);
- reg &= ~(MIC_X100_SBOX_DBR_BITS(0xf) |
- MIC_X100_SBOX_DMA_BITS(0xff));
- mic_mmio_write(mw, reg, siac0);
- }
-}
-
-/**
- * mic_x100_send_sbox_intr - Send an MIC_X100_SBOX interrupt to MIC.
- * @mdev: pointer to mic_device instance
- * @doorbell: doorbell number
- */
-static void mic_x100_send_sbox_intr(struct mic_device *mdev,
- int doorbell)
-{
- struct mic_mw *mw = &mdev->mmio;
- u64 apic_icr_offset = MIC_X100_SBOX_APICICR0 + doorbell * 8;
- u32 apicicr_low = mic_mmio_read(mw, MIC_X100_SBOX_BASE_ADDRESS +
- apic_icr_offset);
-
- /* for MIC we need to make sure we "hit" the send_icr bit (13) */
- apicicr_low = (apicicr_low | (1 << 13));
-
- /* Ensure that the interrupt is ordered w.r.t. previous stores. */
- wmb();
- mic_mmio_write(mw, apicicr_low,
- MIC_X100_SBOX_BASE_ADDRESS + apic_icr_offset);
-}
-
-/**
- * mic_x100_send_rdmasr_intr - Send an RDMASR interrupt to MIC.
- * @mdev: pointer to mic_device instance
- * @doorbell: doorbell number
- */
-static void mic_x100_send_rdmasr_intr(struct mic_device *mdev,
- int doorbell)
-{
- int rdmasr_offset = MIC_X100_SBOX_RDMASR0 + (doorbell << 2);
- /* Ensure that the interrupt is ordered w.r.t. previous stores. */
- wmb();
- mic_mmio_write(&mdev->mmio, 0,
- MIC_X100_SBOX_BASE_ADDRESS + rdmasr_offset);
-}
-
-/**
- * __mic_x100_send_intr - Send interrupt to MIC.
- * @mdev: pointer to mic_device instance
- * @doorbell: doorbell number.
- */
-static void mic_x100_send_intr(struct mic_device *mdev, int doorbell)
-{
- int rdmasr_db;
- if (doorbell < MIC_X100_NUM_SBOX_IRQ) {
- mic_x100_send_sbox_intr(mdev, doorbell);
- } else {
- rdmasr_db = doorbell - MIC_X100_NUM_SBOX_IRQ;
- mic_x100_send_rdmasr_intr(mdev, rdmasr_db);
- }
-}
-
-/**
- * mic_x100_ack_interrupt - Read the interrupt sources register and
- * clear it. This function will be called in the MSI/INTx case.
- * @mdev: Pointer to mic_device instance.
- *
- * Returns: bitmask of interrupt sources triggered.
- */
-static u32 mic_x100_ack_interrupt(struct mic_device *mdev)
-{
- u32 sicr0 = MIC_X100_SBOX_BASE_ADDRESS + MIC_X100_SBOX_SICR0;
- u32 reg = mic_mmio_read(&mdev->mmio, sicr0);
- mic_mmio_write(&mdev->mmio, reg, sicr0);
- return reg;
-}
-
-/**
- * mic_x100_intr_workarounds - These hardware specific workarounds are
- * to be invoked everytime an interrupt is handled.
- * @mdev: Pointer to mic_device instance.
- *
- * Returns: none
- */
-static void mic_x100_intr_workarounds(struct mic_device *mdev)
-{
- struct mic_mw *mw = &mdev->mmio;
-
- /* Clear pending bit array. */
- if (MIC_A0_STEP == mdev->stepping)
- mic_mmio_write(mw, 1, MIC_X100_SBOX_BASE_ADDRESS +
- MIC_X100_SBOX_MSIXPBACR);
-
- if (mdev->stepping >= MIC_B0_STEP)
- mdev->intr_ops->enable_interrupts(mdev);
-}
-
-/**
- * mic_x100_hw_intr_init - Initialize h/w specific interrupt
- * information.
- * @mdev: pointer to mic_device instance
- */
-static void mic_x100_hw_intr_init(struct mic_device *mdev)
-{
- mdev->intr_info = (struct mic_intr_info *)mic_x100_intr_init;
-}
-
-/**
- * mic_x100_read_msi_to_src_map - read from the MSI mapping registers
- * @mdev: pointer to mic_device instance
- * @idx: index to the mapping register, 0 based
- *
- * This function allows reading of the 32bit MSI mapping register.
- *
- * RETURNS: The value in the register.
- */
-static u32
-mic_x100_read_msi_to_src_map(struct mic_device *mdev, int idx)
-{
- return mic_mmio_read(&mdev->mmio,
- MIC_X100_SBOX_BASE_ADDRESS +
- MIC_X100_SBOX_MXAR0 + idx * 4);
-}
-
-/**
- * mic_x100_program_msi_to_src_map - program the MSI mapping registers
- * @mdev: pointer to mic_device instance
- * @idx: index to the mapping register, 0 based
- * @offset: The bit offset in the register that needs to be updated.
- * @set: boolean specifying if the bit in the specified offset needs
- * to be set or cleared.
- *
- * RETURNS: None.
- */
-static void
-mic_x100_program_msi_to_src_map(struct mic_device *mdev,
- int idx, int offset, bool set)
-{
- unsigned long reg;
- struct mic_mw *mw = &mdev->mmio;
- u32 mxar = MIC_X100_SBOX_BASE_ADDRESS +
- MIC_X100_SBOX_MXAR0 + idx * 4;
-
- reg = mic_mmio_read(mw, mxar);
- if (set)
- __set_bit(offset, ®);
- else
- __clear_bit(offset, ®);
- mic_mmio_write(mw, reg, mxar);
-}
-
-/*
- * mic_x100_reset_fw_ready - Reset Firmware ready status field.
- * @mdev: pointer to mic_device instance
- */
-static void mic_x100_reset_fw_ready(struct mic_device *mdev)
-{
- mdev->ops->write_spad(mdev, MIC_X100_DOWNLOAD_INFO, 0);
-}
-
-/*
- * mic_x100_is_fw_ready - Check if firmware is ready.
- * @mdev: pointer to mic_device instance
- */
-static bool mic_x100_is_fw_ready(struct mic_device *mdev)
-{
- u32 scratch2 = mdev->ops->read_spad(mdev, MIC_X100_DOWNLOAD_INFO);
- return MIC_X100_SPAD2_DOWNLOAD_STATUS(scratch2) ? true : false;
-}
-
-/**
- * mic_x100_get_apic_id - Get bootstrap APIC ID.
- * @mdev: pointer to mic_device instance
- */
-static u32 mic_x100_get_apic_id(struct mic_device *mdev)
-{
- u32 scratch2 = 0;
-
- scratch2 = mdev->ops->read_spad(mdev, MIC_X100_DOWNLOAD_INFO);
- return MIC_X100_SPAD2_APIC_ID(scratch2);
-}
-
-/**
- * mic_x100_send_firmware_intr - Send an interrupt to the firmware on MIC.
- * @mdev: pointer to mic_device instance
- */
-static void mic_x100_send_firmware_intr(struct mic_device *mdev)
-{
- u32 apicicr_low;
- u64 apic_icr_offset = MIC_X100_SBOX_APICICR7;
- int vector = MIC_X100_BSP_INTERRUPT_VECTOR;
- struct mic_mw *mw = &mdev->mmio;
-
- /*
- * For MIC we need to make sure we "hit"
- * the send_icr bit (13).
- */
- apicicr_low = (vector | (1 << 13));
-
- mic_mmio_write(mw, mic_x100_get_apic_id(mdev),
- MIC_X100_SBOX_BASE_ADDRESS + apic_icr_offset + 4);
-
- /* Ensure that the interrupt is ordered w.r.t. previous stores. */
- wmb();
- mic_mmio_write(mw, apicicr_low,
- MIC_X100_SBOX_BASE_ADDRESS + apic_icr_offset);
-}
-
-/**
- * mic_x100_hw_reset - Reset the MIC device.
- * @mdev: pointer to mic_device instance
- */
-static void mic_x100_hw_reset(struct mic_device *mdev)
-{
- u32 reset_reg;
- u32 rgcr = MIC_X100_SBOX_BASE_ADDRESS + MIC_X100_SBOX_RGCR;
- struct mic_mw *mw = &mdev->mmio;
-
- /* Ensure that the reset is ordered w.r.t. previous loads and stores */
- mb();
- /* Trigger reset */
- reset_reg = mic_mmio_read(mw, rgcr);
- reset_reg |= 0x1;
- mic_mmio_write(mw, reset_reg, rgcr);
- /*
- * It seems we really want to delay at least 1 second
- * after touching reset to prevent a lot of problems.
- */
- msleep(1000);
-}
-
-/**
- * mic_x100_load_command_line - Load command line to MIC.
- * @mdev: pointer to mic_device instance
- * @fw: the firmware image
- *
- * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
- */
-static int
-mic_x100_load_command_line(struct mic_device *mdev, const struct firmware *fw)
-{
- u32 len = 0;
- u32 boot_mem;
- char *buf;
- void __iomem *cmd_line_va = mdev->aper.va + mdev->bootaddr + fw->size;
-#define CMDLINE_SIZE 2048
-
- boot_mem = mdev->aper.len >> 20;
- buf = kzalloc(CMDLINE_SIZE, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
-
- len += scnprintf(buf, CMDLINE_SIZE - len,
- " mem=%dM", boot_mem);
- if (mdev->cosm_dev->cmdline)
- scnprintf(buf + len, CMDLINE_SIZE - len, " %s",
- mdev->cosm_dev->cmdline);
- memcpy_toio(cmd_line_va, buf, strlen(buf) + 1);
- kfree(buf);
- return 0;
-}
-
-/**
- * mic_x100_load_ramdisk - Load ramdisk to MIC.
- * @mdev: pointer to mic_device instance
- *
- * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
- */
-static int
-mic_x100_load_ramdisk(struct mic_device *mdev)
-{
- const struct firmware *fw;
- int rc;
- struct boot_params __iomem *bp = mdev->aper.va + mdev->bootaddr;
-
- rc = request_firmware(&fw, mdev->cosm_dev->ramdisk, &mdev->pdev->dev);
- if (rc < 0) {
- dev_err(&mdev->pdev->dev,
- "ramdisk request_firmware failed: %d %s\n",
- rc, mdev->cosm_dev->ramdisk);
- goto error;
- }
- /*
- * Typically the bootaddr for card OS is 64M
- * so copy over the ramdisk @ 128M.
- */
- memcpy_toio(mdev->aper.va + (mdev->bootaddr << 1), fw->data, fw->size);
- iowrite32(mdev->bootaddr << 1, &bp->hdr.ramdisk_image);
- iowrite32(fw->size, &bp->hdr.ramdisk_size);
- release_firmware(fw);
-error:
- return rc;
-}
-
-/**
- * mic_x100_get_boot_addr - Get MIC boot address.
- * @mdev: pointer to mic_device instance
- *
- * This function is called during firmware load to determine
- * the address at which the OS should be downloaded in card
- * memory i.e. GDDR.
- * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
- */
-static int
-mic_x100_get_boot_addr(struct mic_device *mdev)
-{
- u32 scratch2, boot_addr;
- int rc = 0;
-
- scratch2 = mdev->ops->read_spad(mdev, MIC_X100_DOWNLOAD_INFO);
- boot_addr = MIC_X100_SPAD2_DOWNLOAD_ADDR(scratch2);
- dev_dbg(&mdev->pdev->dev, "%s %d boot_addr 0x%x\n",
- __func__, __LINE__, boot_addr);
- if (boot_addr > (1 << 31)) {
- dev_err(&mdev->pdev->dev,
- "incorrect bootaddr 0x%x\n",
- boot_addr);
- rc = -EINVAL;
- goto error;
- }
- mdev->bootaddr = boot_addr;
-error:
- return rc;
-}
-
-/**
- * mic_x100_load_firmware - Load firmware to MIC.
- * @mdev: pointer to mic_device instance
- * @buf: buffer containing boot string including firmware/ramdisk path.
- *
- * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
- */
-static int
-mic_x100_load_firmware(struct mic_device *mdev, const char *buf)
-{
- int rc;
- const struct firmware *fw;
-
- rc = mic_x100_get_boot_addr(mdev);
- if (rc)
- return rc;
- /* load OS */
- rc = request_firmware(&fw, mdev->cosm_dev->firmware, &mdev->pdev->dev);
- if (rc < 0) {
- dev_err(&mdev->pdev->dev,
- "ramdisk request_firmware failed: %d %s\n",
- rc, mdev->cosm_dev->firmware);
- return rc;
- }
- if (mdev->bootaddr > mdev->aper.len - fw->size) {
- rc = -EINVAL;
- dev_err(&mdev->pdev->dev, "%s %d rc %d bootaddr 0x%x\n",
- __func__, __LINE__, rc, mdev->bootaddr);
- goto error;
- }
- memcpy_toio(mdev->aper.va + mdev->bootaddr, fw->data, fw->size);
- mdev->ops->write_spad(mdev, MIC_X100_FW_SIZE, fw->size);
- if (!strcmp(mdev->cosm_dev->bootmode, "flash")) {
- rc = -EINVAL;
- dev_err(&mdev->pdev->dev, "%s %d rc %d\n",
- __func__, __LINE__, rc);
- goto error;
- }
- /* load command line */
- rc = mic_x100_load_command_line(mdev, fw);
- if (rc) {
- dev_err(&mdev->pdev->dev, "%s %d rc %d\n",
- __func__, __LINE__, rc);
- goto error;
- }
- release_firmware(fw);
- /* load ramdisk */
- if (mdev->cosm_dev->ramdisk)
- rc = mic_x100_load_ramdisk(mdev);
-
- return rc;
-
-error:
- release_firmware(fw);
- return rc;
-}
-
-/**
- * mic_x100_get_postcode - Get postcode status from firmware.
- * @mdev: pointer to mic_device instance
- *
- * RETURNS: postcode.
- */
-static u32 mic_x100_get_postcode(struct mic_device *mdev)
-{
- return mic_mmio_read(&mdev->mmio, MIC_X100_POSTCODE);
-}
-
-/**
- * mic_x100_smpt_set - Update an SMPT entry with a DMA address.
- * @mdev: pointer to mic_device instance
- * @dma_addr: DMA address to use
- * @index: entry to write to
- *
- * RETURNS: none.
- */
-static void
-mic_x100_smpt_set(struct mic_device *mdev, dma_addr_t dma_addr, u8 index)
-{
-#define SNOOP_ON (0 << 0)
-#define SNOOP_OFF (1 << 0)
-/*
- * Sbox Smpt Reg Bits:
- * Bits 31:2 Host address
- * Bits 1 RSVD
- * Bits 0 No snoop
- */
-#define BUILD_SMPT(NO_SNOOP, HOST_ADDR) \
- (u32)(((HOST_ADDR) << 2) | ((NO_SNOOP) & 0x01))
-
- uint32_t smpt_reg_val = BUILD_SMPT(SNOOP_ON,
- dma_addr >> mdev->smpt->info.page_shift);
- mic_mmio_write(&mdev->mmio, smpt_reg_val,
- MIC_X100_SBOX_BASE_ADDRESS +
- MIC_X100_SBOX_SMPT00 + (4 * index));
-}
-
-/**
- * mic_x100_smpt_hw_init - Initialize SMPT X100 specific fields.
- * @mdev: pointer to mic_device instance
- *
- * RETURNS: none.
- */
-static void mic_x100_smpt_hw_init(struct mic_device *mdev)
-{
- struct mic_smpt_hw_info *info = &mdev->smpt->info;
-
- info->num_reg = 32;
- info->page_shift = 34;
- info->page_size = (1ULL << info->page_shift);
- info->base = 0x8000000000ULL;
-}
-
-struct mic_smpt_ops mic_x100_smpt_ops = {
- .init = mic_x100_smpt_hw_init,
- .set = mic_x100_smpt_set,
-};
-
-static bool mic_x100_dma_filter(struct dma_chan *chan, void *param)
-{
- if (chan->device->dev->parent == (struct device *)param)
- return true;
- return false;
-}
-
-struct mic_hw_ops mic_x100_ops = {
- .aper_bar = MIC_X100_APER_BAR,
- .mmio_bar = MIC_X100_MMIO_BAR,
- .read_spad = mic_x100_read_spad,
- .write_spad = mic_x100_write_spad,
- .send_intr = mic_x100_send_intr,
- .ack_interrupt = mic_x100_ack_interrupt,
- .intr_workarounds = mic_x100_intr_workarounds,
- .reset = mic_x100_hw_reset,
- .reset_fw_ready = mic_x100_reset_fw_ready,
- .is_fw_ready = mic_x100_is_fw_ready,
- .send_firmware_intr = mic_x100_send_firmware_intr,
- .load_mic_fw = mic_x100_load_firmware,
- .get_postcode = mic_x100_get_postcode,
- .dma_filter = mic_x100_dma_filter,
-};
-
-struct mic_hw_intr_ops mic_x100_intr_ops = {
- .intr_init = mic_x100_hw_intr_init,
- .enable_interrupts = mic_x100_enable_interrupts,
- .disable_interrupts = mic_x100_disable_interrupts,
- .program_msi_to_src_map = mic_x100_program_msi_to_src_map,
- .read_msi_to_src_map = mic_x100_read_msi_to_src_map,
-};
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Intel MIC Host driver.
- */
-#ifndef _MIC_X100_HW_H_
-#define _MIC_X100_HW_H_
-
-#define MIC_X100_PCI_DEVICE_2250 0x2250
-#define MIC_X100_PCI_DEVICE_2251 0x2251
-#define MIC_X100_PCI_DEVICE_2252 0x2252
-#define MIC_X100_PCI_DEVICE_2253 0x2253
-#define MIC_X100_PCI_DEVICE_2254 0x2254
-#define MIC_X100_PCI_DEVICE_2255 0x2255
-#define MIC_X100_PCI_DEVICE_2256 0x2256
-#define MIC_X100_PCI_DEVICE_2257 0x2257
-#define MIC_X100_PCI_DEVICE_2258 0x2258
-#define MIC_X100_PCI_DEVICE_2259 0x2259
-#define MIC_X100_PCI_DEVICE_225a 0x225a
-#define MIC_X100_PCI_DEVICE_225b 0x225b
-#define MIC_X100_PCI_DEVICE_225c 0x225c
-#define MIC_X100_PCI_DEVICE_225d 0x225d
-#define MIC_X100_PCI_DEVICE_225e 0x225e
-
-#define MIC_X100_APER_BAR 0
-#define MIC_X100_MMIO_BAR 4
-
-#define MIC_X100_SBOX_BASE_ADDRESS 0x00010000
-#define MIC_X100_SBOX_SPAD0 0x0000AB20
-#define MIC_X100_SBOX_SICR0_DBR(x) ((x) & 0xf)
-#define MIC_X100_SBOX_SICR0_DMA(x) (((x) >> 8) & 0xff)
-#define MIC_X100_SBOX_SICE0_DBR(x) ((x) & 0xf)
-#define MIC_X100_SBOX_DBR_BITS(x) ((x) & 0xf)
-#define MIC_X100_SBOX_SICE0_DMA(x) (((x) >> 8) & 0xff)
-#define MIC_X100_SBOX_DMA_BITS(x) (((x) & 0xff) << 8)
-
-#define MIC_X100_SBOX_APICICR0 0x0000A9D0
-#define MIC_X100_SBOX_SICR0 0x00009004
-#define MIC_X100_SBOX_SICE0 0x0000900C
-#define MIC_X100_SBOX_SICC0 0x00009010
-#define MIC_X100_SBOX_SIAC0 0x00009014
-#define MIC_X100_SBOX_MSIXPBACR 0x00009084
-#define MIC_X100_SBOX_MXAR0 0x00009044
-#define MIC_X100_SBOX_SMPT00 0x00003100
-#define MIC_X100_SBOX_RDMASR0 0x0000B180
-
-#define MIC_X100_DOORBELL_IDX_START 0
-#define MIC_X100_NUM_DOORBELL 4
-#define MIC_X100_DMA_IDX_START 8
-#define MIC_X100_NUM_DMA 8
-#define MIC_X100_ERR_IDX_START 30
-#define MIC_X100_NUM_ERR 1
-
-#define MIC_X100_NUM_SBOX_IRQ 8
-#define MIC_X100_NUM_RDMASR_IRQ 8
-#define MIC_X100_RDMASR_IRQ_BASE 17
-#define MIC_X100_SPAD2_DOWNLOAD_STATUS(x) ((x) & 0x1)
-#define MIC_X100_SPAD2_APIC_ID(x) (((x) >> 1) & 0x1ff)
-#define MIC_X100_SPAD2_DOWNLOAD_ADDR(x) ((x) & 0xfffff000)
-#define MIC_X100_SBOX_APICICR7 0x0000AA08
-#define MIC_X100_SBOX_RGCR 0x00004010
-#define MIC_X100_SBOX_SDBIC0 0x0000CC90
-#define MIC_X100_DOWNLOAD_INFO 2
-#define MIC_X100_FW_SIZE 5
-#define MIC_X100_POSTCODE 0x242c
-
-/* Host->Card(bootstrap) Interrupt Vector */
-#define MIC_X100_BSP_INTERRUPT_VECTOR 229
-
-extern struct mic_hw_ops mic_x100_ops;
-extern struct mic_smpt_ops mic_x100_smpt_ops;
-extern struct mic_hw_intr_ops mic_x100_intr_ops;
-
-#endif
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0
-#
-# Makefile - SCIF driver.
-# Copyright(c) 2014, Intel Corporation.
-#
-obj-$(CONFIG_SCIF) += scif.o
-scif-objs := scif_main.o
-scif-objs += scif_peer_bus.o
-scif-objs += scif_ports.o
-scif-objs += scif_debugfs.o
-scif-objs += scif_fd.o
-scif-objs += scif_api.o
-scif-objs += scif_epd.o
-scif-objs += scif_rb.o
-scif-objs += scif_nodeqp.o
-scif-objs += scif_nm.o
-scif-objs += scif_dma.o
-scif-objs += scif_fence.o
-scif-objs += scif_mmap.o
-scif-objs += scif_rma.o
-scif-objs += scif_rma_list.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#include <linux/scif.h>
-#include "scif_main.h"
-#include "scif_map.h"
-
-static const char * const scif_ep_states[] = {
- "Unbound",
- "Bound",
- "Listening",
- "Connected",
- "Connecting",
- "Mapping",
- "Closing",
- "Close Listening",
- "Disconnected",
- "Zombie"};
-
-enum conn_async_state {
- ASYNC_CONN_IDLE = 1, /* ep setup for async connect */
- ASYNC_CONN_INPROGRESS, /* async connect in progress */
- ASYNC_CONN_FLUSH_WORK /* async work flush in progress */
-};
-
-/*
- * File operations for anonymous inode file associated with a SCIF endpoint,
- * used in kernel mode SCIF poll. Kernel mode SCIF poll calls portions of the
- * poll API in the kernel and these take in a struct file *. Since a struct
- * file is not available to kernel mode SCIF, it uses an anonymous file for
- * this purpose.
- */
-const struct file_operations scif_anon_fops = {
- .owner = THIS_MODULE,
-};
-
-scif_epd_t scif_open(void)
-{
- struct scif_endpt *ep;
- int err;
-
- might_sleep();
- ep = kzalloc(sizeof(*ep), GFP_KERNEL);
- if (!ep)
- goto err_ep_alloc;
-
- ep->qp_info.qp = kzalloc(sizeof(*ep->qp_info.qp), GFP_KERNEL);
- if (!ep->qp_info.qp)
- goto err_qp_alloc;
-
- err = scif_anon_inode_getfile(ep);
- if (err)
- goto err_anon_inode;
-
- spin_lock_init(&ep->lock);
- mutex_init(&ep->sendlock);
- mutex_init(&ep->recvlock);
-
- scif_rma_ep_init(ep);
- ep->state = SCIFEP_UNBOUND;
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI open: ep %p success\n", ep);
- return ep;
-
-err_anon_inode:
- kfree(ep->qp_info.qp);
-err_qp_alloc:
- kfree(ep);
-err_ep_alloc:
- return NULL;
-}
-EXPORT_SYMBOL_GPL(scif_open);
-
-/*
- * scif_disconnect_ep - Disconnects the endpoint if found
- * @epd: The end point returned from scif_open()
- */
-static struct scif_endpt *scif_disconnect_ep(struct scif_endpt *ep)
-{
- struct scifmsg msg;
- struct scif_endpt *fep = NULL;
- struct scif_endpt *tmpep;
- struct list_head *pos, *tmpq;
- int err;
-
- /*
- * Wake up any threads blocked in send()/recv() before closing
- * out the connection. Grabbing and releasing the send/recv lock
- * will ensure that any blocked senders/receivers have exited for
- * Ring 0 endpoints. It is a Ring 0 bug to call send/recv after
- * close. Ring 3 endpoints are not affected since close will not
- * be called while there are IOCTLs executing.
- */
- wake_up_interruptible(&ep->sendwq);
- wake_up_interruptible(&ep->recvwq);
- mutex_lock(&ep->sendlock);
- mutex_unlock(&ep->sendlock);
- mutex_lock(&ep->recvlock);
- mutex_unlock(&ep->recvlock);
-
- /* Remove from the connected list */
- mutex_lock(&scif_info.connlock);
- list_for_each_safe(pos, tmpq, &scif_info.connected) {
- tmpep = list_entry(pos, struct scif_endpt, list);
- if (tmpep == ep) {
- list_del(pos);
- fep = tmpep;
- spin_lock(&ep->lock);
- break;
- }
- }
-
- if (!fep) {
- /*
- * The other side has completed the disconnect before
- * the end point can be removed from the list. Therefore
- * the ep lock is not locked, traverse the disconnected
- * list to find the endpoint and release the conn lock.
- */
- list_for_each_safe(pos, tmpq, &scif_info.disconnected) {
- tmpep = list_entry(pos, struct scif_endpt, list);
- if (tmpep == ep) {
- list_del(pos);
- break;
- }
- }
- mutex_unlock(&scif_info.connlock);
- return NULL;
- }
-
- init_completion(&ep->discon);
- msg.uop = SCIF_DISCNCT;
- msg.src = ep->port;
- msg.dst = ep->peer;
- msg.payload[0] = (u64)ep;
- msg.payload[1] = ep->remote_ep;
-
- err = scif_nodeqp_send(ep->remote_dev, &msg);
- spin_unlock(&ep->lock);
- mutex_unlock(&scif_info.connlock);
-
- if (!err)
- /* Wait for the remote node to respond with SCIF_DISCNT_ACK */
- wait_for_completion_timeout(&ep->discon,
- SCIF_NODE_ALIVE_TIMEOUT);
- return ep;
-}
-
-int scif_close(scif_epd_t epd)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- struct scif_endpt *tmpep;
- struct list_head *pos, *tmpq;
- enum scif_epd_state oldstate;
- bool flush_conn;
-
- dev_dbg(scif_info.mdev.this_device, "SCIFAPI close: ep %p %s\n",
- ep, scif_ep_states[ep->state]);
- might_sleep();
- spin_lock(&ep->lock);
- flush_conn = (ep->conn_async_state == ASYNC_CONN_INPROGRESS);
- spin_unlock(&ep->lock);
-
- if (flush_conn)
- flush_work(&scif_info.conn_work);
-
- spin_lock(&ep->lock);
- oldstate = ep->state;
-
- ep->state = SCIFEP_CLOSING;
-
- switch (oldstate) {
- case SCIFEP_ZOMBIE:
- dev_err(scif_info.mdev.this_device,
- "SCIFAPI close: zombie state unexpected\n");
- fallthrough;
- case SCIFEP_DISCONNECTED:
- spin_unlock(&ep->lock);
- scif_unregister_all_windows(epd);
- /* Remove from the disconnected list */
- mutex_lock(&scif_info.connlock);
- list_for_each_safe(pos, tmpq, &scif_info.disconnected) {
- tmpep = list_entry(pos, struct scif_endpt, list);
- if (tmpep == ep) {
- list_del(pos);
- break;
- }
- }
- mutex_unlock(&scif_info.connlock);
- break;
- case SCIFEP_UNBOUND:
- case SCIFEP_BOUND:
- case SCIFEP_CONNECTING:
- spin_unlock(&ep->lock);
- break;
- case SCIFEP_MAPPING:
- case SCIFEP_CONNECTED:
- case SCIFEP_CLOSING:
- {
- spin_unlock(&ep->lock);
- scif_unregister_all_windows(epd);
- scif_disconnect_ep(ep);
- break;
- }
- case SCIFEP_LISTENING:
- case SCIFEP_CLLISTEN:
- {
- struct scif_conreq *conreq;
- struct scifmsg msg;
- struct scif_endpt *aep;
-
- spin_unlock(&ep->lock);
- mutex_lock(&scif_info.eplock);
-
- /* remove from listen list */
- list_for_each_safe(pos, tmpq, &scif_info.listen) {
- tmpep = list_entry(pos, struct scif_endpt, list);
- if (tmpep == ep)
- list_del(pos);
- }
- /* Remove any dangling accepts */
- while (ep->acceptcnt) {
- aep = list_first_entry(&ep->li_accept,
- struct scif_endpt, liacceptlist);
- list_del(&aep->liacceptlist);
- scif_put_port(aep->port.port);
- list_for_each_safe(pos, tmpq, &scif_info.uaccept) {
- tmpep = list_entry(pos, struct scif_endpt,
- miacceptlist);
- if (tmpep == aep) {
- list_del(pos);
- break;
- }
- }
- mutex_unlock(&scif_info.eplock);
- mutex_lock(&scif_info.connlock);
- list_for_each_safe(pos, tmpq, &scif_info.connected) {
- tmpep = list_entry(pos,
- struct scif_endpt, list);
- if (tmpep == aep) {
- list_del(pos);
- break;
- }
- }
- list_for_each_safe(pos, tmpq, &scif_info.disconnected) {
- tmpep = list_entry(pos,
- struct scif_endpt, list);
- if (tmpep == aep) {
- list_del(pos);
- break;
- }
- }
- mutex_unlock(&scif_info.connlock);
- scif_teardown_ep(aep);
- mutex_lock(&scif_info.eplock);
- scif_add_epd_to_zombie_list(aep, SCIF_EPLOCK_HELD);
- ep->acceptcnt--;
- }
-
- spin_lock(&ep->lock);
- mutex_unlock(&scif_info.eplock);
-
- /* Remove and reject any pending connection requests. */
- while (ep->conreqcnt) {
- conreq = list_first_entry(&ep->conlist,
- struct scif_conreq, list);
- list_del(&conreq->list);
-
- msg.uop = SCIF_CNCT_REJ;
- msg.dst.node = conreq->msg.src.node;
- msg.dst.port = conreq->msg.src.port;
- msg.payload[0] = conreq->msg.payload[0];
- msg.payload[1] = conreq->msg.payload[1];
- /*
- * No Error Handling on purpose for scif_nodeqp_send().
- * If the remote node is lost we still want free the
- * connection requests on the self node.
- */
- scif_nodeqp_send(&scif_dev[conreq->msg.src.node],
- &msg);
- ep->conreqcnt--;
- kfree(conreq);
- }
-
- spin_unlock(&ep->lock);
- /* If a kSCIF accept is waiting wake it up */
- wake_up_interruptible(&ep->conwq);
- break;
- }
- }
- scif_put_port(ep->port.port);
- scif_anon_inode_fput(ep);
- scif_teardown_ep(ep);
- scif_add_epd_to_zombie_list(ep, !SCIF_EPLOCK_HELD);
- return 0;
-}
-EXPORT_SYMBOL_GPL(scif_close);
-
-/**
- * scif_flush() - Wakes up any blocking accepts. The endpoint will no longer
- * accept new connections.
- * @epd: The end point returned from scif_open()
- */
-int __scif_flush(scif_epd_t epd)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
-
- switch (ep->state) {
- case SCIFEP_LISTENING:
- {
- ep->state = SCIFEP_CLLISTEN;
-
- /* If an accept is waiting wake it up */
- wake_up_interruptible(&ep->conwq);
- break;
- }
- default:
- break;
- }
- return 0;
-}
-
-int scif_bind(scif_epd_t epd, u16 pn)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- int ret = 0;
- int tmp;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI bind: ep %p %s requested port number %d\n",
- ep, scif_ep_states[ep->state], pn);
- if (pn) {
- /*
- * Similar to IETF RFC 1700, SCIF ports below
- * SCIF_ADMIN_PORT_END can only be bound by system (or root)
- * processes or by processes executed by privileged users.
- */
- if (pn < SCIF_ADMIN_PORT_END && !capable(CAP_SYS_ADMIN)) {
- ret = -EACCES;
- goto scif_bind_admin_exit;
- }
- }
-
- spin_lock(&ep->lock);
- if (ep->state == SCIFEP_BOUND) {
- ret = -EINVAL;
- goto scif_bind_exit;
- } else if (ep->state != SCIFEP_UNBOUND) {
- ret = -EISCONN;
- goto scif_bind_exit;
- }
-
- if (pn) {
- tmp = scif_rsrv_port(pn);
- if (tmp != pn) {
- ret = -EINVAL;
- goto scif_bind_exit;
- }
- } else {
- ret = scif_get_new_port();
- if (ret < 0)
- goto scif_bind_exit;
- pn = ret;
- }
-
- ep->state = SCIFEP_BOUND;
- ep->port.node = scif_info.nodeid;
- ep->port.port = pn;
- ep->conn_async_state = ASYNC_CONN_IDLE;
- ret = pn;
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI bind: bound to port number %d\n", pn);
-scif_bind_exit:
- spin_unlock(&ep->lock);
-scif_bind_admin_exit:
- return ret;
-}
-EXPORT_SYMBOL_GPL(scif_bind);
-
-int scif_listen(scif_epd_t epd, int backlog)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI listen: ep %p %s\n", ep, scif_ep_states[ep->state]);
- spin_lock(&ep->lock);
- switch (ep->state) {
- case SCIFEP_ZOMBIE:
- case SCIFEP_CLOSING:
- case SCIFEP_CLLISTEN:
- case SCIFEP_UNBOUND:
- case SCIFEP_DISCONNECTED:
- spin_unlock(&ep->lock);
- return -EINVAL;
- case SCIFEP_LISTENING:
- case SCIFEP_CONNECTED:
- case SCIFEP_CONNECTING:
- case SCIFEP_MAPPING:
- spin_unlock(&ep->lock);
- return -EISCONN;
- case SCIFEP_BOUND:
- break;
- }
-
- ep->state = SCIFEP_LISTENING;
- ep->backlog = backlog;
-
- ep->conreqcnt = 0;
- ep->acceptcnt = 0;
- INIT_LIST_HEAD(&ep->conlist);
- init_waitqueue_head(&ep->conwq);
- INIT_LIST_HEAD(&ep->li_accept);
- spin_unlock(&ep->lock);
-
- /*
- * Listen status is complete so delete the qp information not needed
- * on a listen before placing on the list of listening ep's
- */
- scif_teardown_ep(ep);
- ep->qp_info.qp = NULL;
-
- mutex_lock(&scif_info.eplock);
- list_add_tail(&ep->list, &scif_info.listen);
- mutex_unlock(&scif_info.eplock);
- return 0;
-}
-EXPORT_SYMBOL_GPL(scif_listen);
-
-/*
- ************************************************************************
- * SCIF connection flow:
- *
- * 1) A SCIF listening endpoint can call scif_accept(..) to wait for SCIF
- * connections via a SCIF_CNCT_REQ message
- * 2) A SCIF endpoint can initiate a SCIF connection by calling
- * scif_connect(..) which calls scif_setup_qp_connect(..) which
- * allocates the local qp for the endpoint ring buffer and then sends
- * a SCIF_CNCT_REQ to the remote node and waits for a SCIF_CNCT_GNT or
- * a SCIF_CNCT_REJ message
- * 3) The peer node handles a SCIF_CNCT_REQ via scif_cnctreq_resp(..) which
- * wakes up any threads blocked in step 1 or sends a SCIF_CNCT_REJ
- * message otherwise
- * 4) A thread blocked waiting for incoming connections allocates its local
- * endpoint QP and ring buffer following which it sends a SCIF_CNCT_GNT
- * and waits for a SCIF_CNCT_GNT(N)ACK. If the allocation fails then
- * the node sends a SCIF_CNCT_REJ message
- * 5) Upon receipt of a SCIF_CNCT_GNT or a SCIF_CNCT_REJ message the
- * connecting endpoint is woken up as part of handling
- * scif_cnctgnt_resp(..) following which it maps the remote endpoints'
- * QP, updates its outbound QP and sends a SCIF_CNCT_GNTACK message on
- * success or a SCIF_CNCT_GNTNACK message on failure and completes
- * the scif_connect(..) API
- * 6) Upon receipt of a SCIF_CNCT_GNT(N)ACK the accepting endpoint blocked
- * in step 4 is woken up and completes the scif_accept(..) API
- * 7) The SCIF connection is now established between the two SCIF endpoints.
- */
-static int scif_conn_func(struct scif_endpt *ep)
-{
- int err = 0;
- struct scifmsg msg;
- struct device *spdev;
-
- err = scif_reserve_dma_chan(ep);
- if (err) {
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %d\n", __func__, __LINE__, err);
- ep->state = SCIFEP_BOUND;
- goto connect_error_simple;
- }
- /* Initiate the first part of the endpoint QP setup */
- err = scif_setup_qp_connect(ep->qp_info.qp, &ep->qp_info.qp_offset,
- SCIF_ENDPT_QP_SIZE, ep->remote_dev);
- if (err) {
- dev_err(&ep->remote_dev->sdev->dev,
- "%s err %d qp_offset 0x%llx\n",
- __func__, err, ep->qp_info.qp_offset);
- ep->state = SCIFEP_BOUND;
- goto connect_error_simple;
- }
-
- spdev = scif_get_peer_dev(ep->remote_dev);
- if (IS_ERR(spdev)) {
- err = PTR_ERR(spdev);
- goto cleanup_qp;
- }
- /* Format connect message and send it */
- msg.src = ep->port;
- msg.dst = ep->conn_port;
- msg.uop = SCIF_CNCT_REQ;
- msg.payload[0] = (u64)ep;
- msg.payload[1] = ep->qp_info.qp_offset;
- err = _scif_nodeqp_send(ep->remote_dev, &msg);
- if (err)
- goto connect_error_dec;
- scif_put_peer_dev(spdev);
- /*
- * Wait for the remote node to respond with SCIF_CNCT_GNT or
- * SCIF_CNCT_REJ message.
- */
- err = wait_event_timeout(ep->conwq, ep->state != SCIFEP_CONNECTING,
- SCIF_NODE_ALIVE_TIMEOUT);
- if (!err) {
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d timeout\n", __func__, __LINE__);
- ep->state = SCIFEP_BOUND;
- }
- spdev = scif_get_peer_dev(ep->remote_dev);
- if (IS_ERR(spdev)) {
- err = PTR_ERR(spdev);
- goto cleanup_qp;
- }
- if (ep->state == SCIFEP_MAPPING) {
- err = scif_setup_qp_connect_response(ep->remote_dev,
- ep->qp_info.qp,
- ep->qp_info.gnt_pld);
- /*
- * If the resource to map the queue are not available then
- * we need to tell the other side to terminate the accept
- */
- if (err) {
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %d\n", __func__, __LINE__, err);
- msg.uop = SCIF_CNCT_GNTNACK;
- msg.payload[0] = ep->remote_ep;
- _scif_nodeqp_send(ep->remote_dev, &msg);
- ep->state = SCIFEP_BOUND;
- goto connect_error_dec;
- }
-
- msg.uop = SCIF_CNCT_GNTACK;
- msg.payload[0] = ep->remote_ep;
- err = _scif_nodeqp_send(ep->remote_dev, &msg);
- if (err) {
- ep->state = SCIFEP_BOUND;
- goto connect_error_dec;
- }
- ep->state = SCIFEP_CONNECTED;
- mutex_lock(&scif_info.connlock);
- list_add_tail(&ep->list, &scif_info.connected);
- mutex_unlock(&scif_info.connlock);
- dev_dbg(&ep->remote_dev->sdev->dev,
- "SCIFAPI connect: ep %p connected\n", ep);
- } else if (ep->state == SCIFEP_BOUND) {
- dev_dbg(&ep->remote_dev->sdev->dev,
- "SCIFAPI connect: ep %p connection refused\n", ep);
- err = -ECONNREFUSED;
- goto connect_error_dec;
- }
- scif_put_peer_dev(spdev);
- return err;
-connect_error_dec:
- scif_put_peer_dev(spdev);
-cleanup_qp:
- scif_cleanup_ep_qp(ep);
-connect_error_simple:
- return err;
-}
-
-/*
- * scif_conn_handler:
- *
- * Workqueue handler for servicing non-blocking SCIF connect
- *
- */
-void scif_conn_handler(struct work_struct *work)
-{
- struct scif_endpt *ep;
-
- do {
- ep = NULL;
- spin_lock(&scif_info.nb_connect_lock);
- if (!list_empty(&scif_info.nb_connect_list)) {
- ep = list_first_entry(&scif_info.nb_connect_list,
- struct scif_endpt, conn_list);
- list_del(&ep->conn_list);
- }
- spin_unlock(&scif_info.nb_connect_lock);
- if (ep) {
- ep->conn_err = scif_conn_func(ep);
- wake_up_interruptible(&ep->conn_pend_wq);
- }
- } while (ep);
-}
-
-int __scif_connect(scif_epd_t epd, struct scif_port_id *dst, bool non_block)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- int err = 0;
- struct scif_dev *remote_dev;
- struct device *spdev;
-
- dev_dbg(scif_info.mdev.this_device, "SCIFAPI connect: ep %p %s\n", ep,
- scif_ep_states[ep->state]);
-
- if (!scif_dev || dst->node > scif_info.maxid)
- return -ENODEV;
-
- might_sleep();
-
- remote_dev = &scif_dev[dst->node];
- spdev = scif_get_peer_dev(remote_dev);
- if (IS_ERR(spdev)) {
- err = PTR_ERR(spdev);
- return err;
- }
-
- spin_lock(&ep->lock);
- switch (ep->state) {
- case SCIFEP_ZOMBIE:
- case SCIFEP_CLOSING:
- err = -EINVAL;
- break;
- case SCIFEP_DISCONNECTED:
- if (ep->conn_async_state == ASYNC_CONN_INPROGRESS)
- ep->conn_async_state = ASYNC_CONN_FLUSH_WORK;
- else
- err = -EINVAL;
- break;
- case SCIFEP_LISTENING:
- case SCIFEP_CLLISTEN:
- err = -EOPNOTSUPP;
- break;
- case SCIFEP_CONNECTING:
- case SCIFEP_MAPPING:
- if (ep->conn_async_state == ASYNC_CONN_INPROGRESS)
- err = -EINPROGRESS;
- else
- err = -EISCONN;
- break;
- case SCIFEP_CONNECTED:
- if (ep->conn_async_state == ASYNC_CONN_INPROGRESS)
- ep->conn_async_state = ASYNC_CONN_FLUSH_WORK;
- else
- err = -EISCONN;
- break;
- case SCIFEP_UNBOUND:
- err = scif_get_new_port();
- if (err < 0)
- break;
- ep->port.port = err;
- ep->port.node = scif_info.nodeid;
- ep->conn_async_state = ASYNC_CONN_IDLE;
- fallthrough;
- case SCIFEP_BOUND:
- /*
- * If a non-blocking connect has been already initiated
- * (conn_async_state is either ASYNC_CONN_INPROGRESS or
- * ASYNC_CONN_FLUSH_WORK), the end point could end up in
- * SCIF_BOUND due an error in the connection process
- * (e.g., connection refused) If conn_async_state is
- * ASYNC_CONN_INPROGRESS - transition to ASYNC_CONN_FLUSH_WORK
- * so that the error status can be collected. If the state is
- * already ASYNC_CONN_FLUSH_WORK - then set the error to
- * EINPROGRESS since some other thread is waiting to collect
- * error status.
- */
- if (ep->conn_async_state == ASYNC_CONN_INPROGRESS) {
- ep->conn_async_state = ASYNC_CONN_FLUSH_WORK;
- } else if (ep->conn_async_state == ASYNC_CONN_FLUSH_WORK) {
- err = -EINPROGRESS;
- } else {
- ep->conn_port = *dst;
- init_waitqueue_head(&ep->sendwq);
- init_waitqueue_head(&ep->recvwq);
- init_waitqueue_head(&ep->conwq);
- ep->conn_async_state = 0;
-
- if (unlikely(non_block))
- ep->conn_async_state = ASYNC_CONN_INPROGRESS;
- }
- break;
- }
-
- if (err || ep->conn_async_state == ASYNC_CONN_FLUSH_WORK)
- goto connect_simple_unlock1;
-
- ep->state = SCIFEP_CONNECTING;
- ep->remote_dev = &scif_dev[dst->node];
- ep->qp_info.qp->magic = SCIFEP_MAGIC;
- if (ep->conn_async_state == ASYNC_CONN_INPROGRESS) {
- init_waitqueue_head(&ep->conn_pend_wq);
- spin_lock(&scif_info.nb_connect_lock);
- list_add_tail(&ep->conn_list, &scif_info.nb_connect_list);
- spin_unlock(&scif_info.nb_connect_lock);
- err = -EINPROGRESS;
- schedule_work(&scif_info.conn_work);
- }
-connect_simple_unlock1:
- spin_unlock(&ep->lock);
- scif_put_peer_dev(spdev);
- if (err) {
- return err;
- } else if (ep->conn_async_state == ASYNC_CONN_FLUSH_WORK) {
- flush_work(&scif_info.conn_work);
- err = ep->conn_err;
- spin_lock(&ep->lock);
- ep->conn_async_state = ASYNC_CONN_IDLE;
- spin_unlock(&ep->lock);
- } else {
- err = scif_conn_func(ep);
- }
- return err;
-}
-
-int scif_connect(scif_epd_t epd, struct scif_port_id *dst)
-{
- return __scif_connect(epd, dst, false);
-}
-EXPORT_SYMBOL_GPL(scif_connect);
-
-/*
- * scif_accept() - Accept a connection request from the remote node
- *
- * The function accepts a connection request from the remote node. Successful
- * complete is indicate by a new end point being created and passed back
- * to the caller for future reference.
- *
- * Upon successful complete a zero will be returned and the peer information
- * will be filled in.
- *
- * If the end point is not in the listening state -EINVAL will be returned.
- *
- * If during the connection sequence resource allocation fails the -ENOMEM
- * will be returned.
- *
- * If the function is called with the ASYNC flag set and no connection requests
- * are pending it will return -EAGAIN.
- *
- * If the remote side is not sending any connection requests the caller may
- * terminate this function with a signal. If so a -EINTR will be returned.
- */
-int scif_accept(scif_epd_t epd, struct scif_port_id *peer,
- scif_epd_t *newepd, int flags)
-{
- struct scif_endpt *lep = (struct scif_endpt *)epd;
- struct scif_endpt *cep;
- struct scif_conreq *conreq;
- struct scifmsg msg;
- int err;
- struct device *spdev;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI accept: ep %p %s\n", lep, scif_ep_states[lep->state]);
-
- if (flags & ~SCIF_ACCEPT_SYNC)
- return -EINVAL;
-
- if (!peer || !newepd)
- return -EINVAL;
-
- might_sleep();
- spin_lock(&lep->lock);
- if (lep->state != SCIFEP_LISTENING) {
- spin_unlock(&lep->lock);
- return -EINVAL;
- }
-
- if (!lep->conreqcnt && !(flags & SCIF_ACCEPT_SYNC)) {
- /* No connection request present and we do not want to wait */
- spin_unlock(&lep->lock);
- return -EAGAIN;
- }
-
- lep->files = current->files;
-retry_connection:
- spin_unlock(&lep->lock);
- /* Wait for the remote node to send us a SCIF_CNCT_REQ */
- err = wait_event_interruptible(lep->conwq,
- (lep->conreqcnt ||
- (lep->state != SCIFEP_LISTENING)));
- if (err)
- return err;
-
- if (lep->state != SCIFEP_LISTENING)
- return -EINTR;
-
- spin_lock(&lep->lock);
-
- if (!lep->conreqcnt)
- goto retry_connection;
-
- /* Get the first connect request off the list */
- conreq = list_first_entry(&lep->conlist, struct scif_conreq, list);
- list_del(&conreq->list);
- lep->conreqcnt--;
- spin_unlock(&lep->lock);
-
- /* Fill in the peer information */
- peer->node = conreq->msg.src.node;
- peer->port = conreq->msg.src.port;
-
- cep = kzalloc(sizeof(*cep), GFP_KERNEL);
- if (!cep) {
- err = -ENOMEM;
- goto scif_accept_error_epalloc;
- }
- spin_lock_init(&cep->lock);
- mutex_init(&cep->sendlock);
- mutex_init(&cep->recvlock);
- cep->state = SCIFEP_CONNECTING;
- cep->remote_dev = &scif_dev[peer->node];
- cep->remote_ep = conreq->msg.payload[0];
-
- scif_rma_ep_init(cep);
-
- err = scif_reserve_dma_chan(cep);
- if (err) {
- dev_err(scif_info.mdev.this_device,
- "%s %d err %d\n", __func__, __LINE__, err);
- goto scif_accept_error_qpalloc;
- }
-
- cep->qp_info.qp = kzalloc(sizeof(*cep->qp_info.qp), GFP_KERNEL);
- if (!cep->qp_info.qp) {
- err = -ENOMEM;
- goto scif_accept_error_qpalloc;
- }
-
- err = scif_anon_inode_getfile(cep);
- if (err)
- goto scif_accept_error_anon_inode;
-
- cep->qp_info.qp->magic = SCIFEP_MAGIC;
- spdev = scif_get_peer_dev(cep->remote_dev);
- if (IS_ERR(spdev)) {
- err = PTR_ERR(spdev);
- goto scif_accept_error_map;
- }
- err = scif_setup_qp_accept(cep->qp_info.qp, &cep->qp_info.qp_offset,
- conreq->msg.payload[1], SCIF_ENDPT_QP_SIZE,
- cep->remote_dev);
- if (err) {
- dev_dbg(&cep->remote_dev->sdev->dev,
- "SCIFAPI accept: ep %p new %p scif_setup_qp_accept %d qp_offset 0x%llx\n",
- lep, cep, err, cep->qp_info.qp_offset);
- scif_put_peer_dev(spdev);
- goto scif_accept_error_map;
- }
-
- cep->port.node = lep->port.node;
- cep->port.port = lep->port.port;
- cep->peer.node = peer->node;
- cep->peer.port = peer->port;
- init_waitqueue_head(&cep->sendwq);
- init_waitqueue_head(&cep->recvwq);
- init_waitqueue_head(&cep->conwq);
-
- msg.uop = SCIF_CNCT_GNT;
- msg.src = cep->port;
- msg.payload[0] = cep->remote_ep;
- msg.payload[1] = cep->qp_info.qp_offset;
- msg.payload[2] = (u64)cep;
-
- err = _scif_nodeqp_send(cep->remote_dev, &msg);
- scif_put_peer_dev(spdev);
- if (err)
- goto scif_accept_error_map;
-retry:
- /* Wait for the remote node to respond with SCIF_CNCT_GNT(N)ACK */
- err = wait_event_timeout(cep->conwq, cep->state != SCIFEP_CONNECTING,
- SCIF_NODE_ACCEPT_TIMEOUT);
- if (!err && scifdev_alive(cep))
- goto retry;
- err = !err ? -ENODEV : 0;
- if (err)
- goto scif_accept_error_map;
- kfree(conreq);
-
- spin_lock(&cep->lock);
-
- if (cep->state == SCIFEP_CLOSING) {
- /*
- * Remote failed to allocate resources and NAKed the grant.
- * There is at this point nothing referencing the new end point.
- */
- spin_unlock(&cep->lock);
- scif_teardown_ep(cep);
- kfree(cep);
-
- /* If call with sync flag then go back and wait. */
- if (flags & SCIF_ACCEPT_SYNC) {
- spin_lock(&lep->lock);
- goto retry_connection;
- }
- return -EAGAIN;
- }
-
- scif_get_port(cep->port.port);
- *newepd = (scif_epd_t)cep;
- spin_unlock(&cep->lock);
- return 0;
-scif_accept_error_map:
- scif_anon_inode_fput(cep);
-scif_accept_error_anon_inode:
- scif_teardown_ep(cep);
-scif_accept_error_qpalloc:
- kfree(cep);
-scif_accept_error_epalloc:
- msg.uop = SCIF_CNCT_REJ;
- msg.dst.node = conreq->msg.src.node;
- msg.dst.port = conreq->msg.src.port;
- msg.payload[0] = conreq->msg.payload[0];
- msg.payload[1] = conreq->msg.payload[1];
- scif_nodeqp_send(&scif_dev[conreq->msg.src.node], &msg);
- kfree(conreq);
- return err;
-}
-EXPORT_SYMBOL_GPL(scif_accept);
-
-/*
- * scif_msg_param_check:
- * @epd: The end point returned from scif_open()
- * @len: Length to receive
- * @flags: blocking or non blocking
- *
- * Validate parameters for messaging APIs scif_send(..)/scif_recv(..).
- */
-static inline int scif_msg_param_check(scif_epd_t epd, int len, int flags)
-{
- int ret = -EINVAL;
-
- if (len < 0)
- goto err_ret;
- if (flags && (!(flags & SCIF_RECV_BLOCK)))
- goto err_ret;
- ret = 0;
-err_ret:
- return ret;
-}
-
-static int _scif_send(scif_epd_t epd, void *msg, int len, int flags)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- struct scifmsg notif_msg;
- int curr_xfer_len = 0, sent_len = 0, write_count;
- int ret = 0;
- struct scif_qp *qp = ep->qp_info.qp;
-
- if (flags & SCIF_SEND_BLOCK)
- might_sleep();
-
- spin_lock(&ep->lock);
- while (sent_len != len && SCIFEP_CONNECTED == ep->state) {
- write_count = scif_rb_space(&qp->outbound_q);
- if (write_count) {
- /* Best effort to send as much data as possible */
- curr_xfer_len = min(len - sent_len, write_count);
- ret = scif_rb_write(&qp->outbound_q, msg,
- curr_xfer_len);
- if (ret < 0)
- break;
- /* Success. Update write pointer */
- scif_rb_commit(&qp->outbound_q);
- /*
- * Send a notification to the peer about the
- * produced data message.
- */
- notif_msg.src = ep->port;
- notif_msg.uop = SCIF_CLIENT_SENT;
- notif_msg.payload[0] = ep->remote_ep;
- ret = _scif_nodeqp_send(ep->remote_dev, ¬if_msg);
- if (ret)
- break;
- sent_len += curr_xfer_len;
- msg = msg + curr_xfer_len;
- continue;
- }
- curr_xfer_len = min(len - sent_len, SCIF_ENDPT_QP_SIZE - 1);
- /* Not enough RB space. return for the Non Blocking case */
- if (!(flags & SCIF_SEND_BLOCK))
- break;
-
- spin_unlock(&ep->lock);
- /* Wait for a SCIF_CLIENT_RCVD message in the Blocking case */
- ret =
- wait_event_interruptible(ep->sendwq,
- (SCIFEP_CONNECTED != ep->state) ||
- (scif_rb_space(&qp->outbound_q) >=
- curr_xfer_len));
- spin_lock(&ep->lock);
- if (ret)
- break;
- }
- if (sent_len)
- ret = sent_len;
- else if (!ret && SCIFEP_CONNECTED != ep->state)
- ret = SCIFEP_DISCONNECTED == ep->state ?
- -ECONNRESET : -ENOTCONN;
- spin_unlock(&ep->lock);
- return ret;
-}
-
-static int _scif_recv(scif_epd_t epd, void *msg, int len, int flags)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- struct scifmsg notif_msg;
- int curr_recv_len = 0, remaining_len = len, read_count;
- int ret = 0;
- struct scif_qp *qp = ep->qp_info.qp;
-
- if (flags & SCIF_RECV_BLOCK)
- might_sleep();
- spin_lock(&ep->lock);
- while (remaining_len && (SCIFEP_CONNECTED == ep->state ||
- SCIFEP_DISCONNECTED == ep->state)) {
- read_count = scif_rb_count(&qp->inbound_q, remaining_len);
- if (read_count) {
- /*
- * Best effort to recv as much data as there
- * are bytes to read in the RB particularly
- * important for the Non Blocking case.
- */
- curr_recv_len = min(remaining_len, read_count);
- scif_rb_get_next(&qp->inbound_q, msg, curr_recv_len);
- if (ep->state == SCIFEP_CONNECTED) {
- /*
- * Update the read pointer only if the endpoint
- * is still connected else the read pointer
- * might no longer exist since the peer has
- * freed resources!
- */
- scif_rb_update_read_ptr(&qp->inbound_q);
- /*
- * Send a notification to the peer about the
- * consumed data message only if the EP is in
- * SCIFEP_CONNECTED state.
- */
- notif_msg.src = ep->port;
- notif_msg.uop = SCIF_CLIENT_RCVD;
- notif_msg.payload[0] = ep->remote_ep;
- ret = _scif_nodeqp_send(ep->remote_dev,
- ¬if_msg);
- if (ret)
- break;
- }
- remaining_len -= curr_recv_len;
- msg = msg + curr_recv_len;
- continue;
- }
- /*
- * Bail out now if the EP is in SCIFEP_DISCONNECTED state else
- * we will keep looping forever.
- */
- if (ep->state == SCIFEP_DISCONNECTED)
- break;
- /*
- * Return in the Non Blocking case if there is no data
- * to read in this iteration.
- */
- if (!(flags & SCIF_RECV_BLOCK))
- break;
- curr_recv_len = min(remaining_len, SCIF_ENDPT_QP_SIZE - 1);
- spin_unlock(&ep->lock);
- /*
- * Wait for a SCIF_CLIENT_SEND message in the blocking case
- * or until other side disconnects.
- */
- ret =
- wait_event_interruptible(ep->recvwq,
- SCIFEP_CONNECTED != ep->state ||
- scif_rb_count(&qp->inbound_q,
- curr_recv_len)
- >= curr_recv_len);
- spin_lock(&ep->lock);
- if (ret)
- break;
- }
- if (len - remaining_len)
- ret = len - remaining_len;
- else if (!ret && ep->state != SCIFEP_CONNECTED)
- ret = ep->state == SCIFEP_DISCONNECTED ?
- -ECONNRESET : -ENOTCONN;
- spin_unlock(&ep->lock);
- return ret;
-}
-
-/**
- * scif_user_send() - Send data to connection queue
- * @epd: The end point returned from scif_open()
- * @msg: Address to place data
- * @len: Length to receive
- * @flags: blocking or non blocking
- *
- * This function is called from the driver IOCTL entry point
- * only and is a wrapper for _scif_send().
- */
-int scif_user_send(scif_epd_t epd, void __user *msg, int len, int flags)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- int err = 0;
- int sent_len = 0;
- char *tmp;
- int loop_len;
- int chunk_len = min(len, (1 << (MAX_ORDER + PAGE_SHIFT - 1)));
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI send (U): ep %p %s\n", ep, scif_ep_states[ep->state]);
- if (!len)
- return 0;
-
- err = scif_msg_param_check(epd, len, flags);
- if (err)
- goto send_err;
-
- tmp = kmalloc(chunk_len, GFP_KERNEL);
- if (!tmp) {
- err = -ENOMEM;
- goto send_err;
- }
- /*
- * Grabbing the lock before breaking up the transfer in
- * multiple chunks is required to ensure that messages do
- * not get fragmented and reordered.
- */
- mutex_lock(&ep->sendlock);
- while (sent_len != len) {
- loop_len = len - sent_len;
- loop_len = min(chunk_len, loop_len);
- if (copy_from_user(tmp, msg, loop_len)) {
- err = -EFAULT;
- goto send_free_err;
- }
- err = _scif_send(epd, tmp, loop_len, flags);
- if (err < 0)
- goto send_free_err;
- sent_len += err;
- msg += err;
- if (err != loop_len)
- goto send_free_err;
- }
-send_free_err:
- mutex_unlock(&ep->sendlock);
- kfree(tmp);
-send_err:
- return err < 0 ? err : sent_len;
-}
-
-/**
- * scif_user_recv() - Receive data from connection queue
- * @epd: The end point returned from scif_open()
- * @msg: Address to place data
- * @len: Length to receive
- * @flags: blocking or non blocking
- *
- * This function is called from the driver IOCTL entry point
- * only and is a wrapper for _scif_recv().
- */
-int scif_user_recv(scif_epd_t epd, void __user *msg, int len, int flags)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- int err = 0;
- int recv_len = 0;
- char *tmp;
- int loop_len;
- int chunk_len = min(len, (1 << (MAX_ORDER + PAGE_SHIFT - 1)));
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI recv (U): ep %p %s\n", ep, scif_ep_states[ep->state]);
- if (!len)
- return 0;
-
- err = scif_msg_param_check(epd, len, flags);
- if (err)
- goto recv_err;
-
- tmp = kmalloc(chunk_len, GFP_KERNEL);
- if (!tmp) {
- err = -ENOMEM;
- goto recv_err;
- }
- /*
- * Grabbing the lock before breaking up the transfer in
- * multiple chunks is required to ensure that messages do
- * not get fragmented and reordered.
- */
- mutex_lock(&ep->recvlock);
- while (recv_len != len) {
- loop_len = len - recv_len;
- loop_len = min(chunk_len, loop_len);
- err = _scif_recv(epd, tmp, loop_len, flags);
- if (err < 0)
- goto recv_free_err;
- if (copy_to_user(msg, tmp, err)) {
- err = -EFAULT;
- goto recv_free_err;
- }
- recv_len += err;
- msg += err;
- if (err != loop_len)
- goto recv_free_err;
- }
-recv_free_err:
- mutex_unlock(&ep->recvlock);
- kfree(tmp);
-recv_err:
- return err < 0 ? err : recv_len;
-}
-
-/**
- * scif_send() - Send data to connection queue
- * @epd: The end point returned from scif_open()
- * @msg: Address to place data
- * @len: Length to receive
- * @flags: blocking or non blocking
- *
- * This function is called from the kernel mode only and is
- * a wrapper for _scif_send().
- */
-int scif_send(scif_epd_t epd, void *msg, int len, int flags)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- int ret;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI send (K): ep %p %s\n", ep, scif_ep_states[ep->state]);
- if (!len)
- return 0;
-
- ret = scif_msg_param_check(epd, len, flags);
- if (ret)
- return ret;
- if (!ep->remote_dev)
- return -ENOTCONN;
- /*
- * Grab the mutex lock in the blocking case only
- * to ensure messages do not get fragmented/reordered.
- * The non blocking mode is protected using spin locks
- * in _scif_send().
- */
- if (flags & SCIF_SEND_BLOCK)
- mutex_lock(&ep->sendlock);
-
- ret = _scif_send(epd, msg, len, flags);
-
- if (flags & SCIF_SEND_BLOCK)
- mutex_unlock(&ep->sendlock);
- return ret;
-}
-EXPORT_SYMBOL_GPL(scif_send);
-
-/**
- * scif_recv() - Receive data from connection queue
- * @epd: The end point returned from scif_open()
- * @msg: Address to place data
- * @len: Length to receive
- * @flags: blocking or non blocking
- *
- * This function is called from the kernel mode only and is
- * a wrapper for _scif_recv().
- */
-int scif_recv(scif_epd_t epd, void *msg, int len, int flags)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- int ret;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI recv (K): ep %p %s\n", ep, scif_ep_states[ep->state]);
- if (!len)
- return 0;
-
- ret = scif_msg_param_check(epd, len, flags);
- if (ret)
- return ret;
- /*
- * Grab the mutex lock in the blocking case only
- * to ensure messages do not get fragmented/reordered.
- * The non blocking mode is protected using spin locks
- * in _scif_send().
- */
- if (flags & SCIF_RECV_BLOCK)
- mutex_lock(&ep->recvlock);
-
- ret = _scif_recv(epd, msg, len, flags);
-
- if (flags & SCIF_RECV_BLOCK)
- mutex_unlock(&ep->recvlock);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(scif_recv);
-
-static inline void _scif_poll_wait(struct file *f, wait_queue_head_t *wq,
- poll_table *p, struct scif_endpt *ep)
-{
- /*
- * Because poll_wait makes a GFP_KERNEL allocation, give up the lock
- * and regrab it afterwards. Because the endpoint state might have
- * changed while the lock was given up, the state must be checked
- * again after re-acquiring the lock. The code in __scif_pollfd(..)
- * does this.
- */
- spin_unlock(&ep->lock);
- poll_wait(f, wq, p);
- spin_lock(&ep->lock);
-}
-
-__poll_t
-__scif_pollfd(struct file *f, poll_table *wait, struct scif_endpt *ep)
-{
- __poll_t mask = 0;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI pollfd: ep %p %s\n", ep, scif_ep_states[ep->state]);
-
- spin_lock(&ep->lock);
-
- /* Endpoint is waiting for a non-blocking connect to complete */
- if (ep->conn_async_state == ASYNC_CONN_INPROGRESS) {
- _scif_poll_wait(f, &ep->conn_pend_wq, wait, ep);
- if (ep->conn_async_state == ASYNC_CONN_INPROGRESS) {
- if (ep->state == SCIFEP_CONNECTED ||
- ep->state == SCIFEP_DISCONNECTED ||
- ep->conn_err)
- mask |= EPOLLOUT;
- goto exit;
- }
- }
-
- /* Endpoint is listening for incoming connection requests */
- if (ep->state == SCIFEP_LISTENING) {
- _scif_poll_wait(f, &ep->conwq, wait, ep);
- if (ep->state == SCIFEP_LISTENING) {
- if (ep->conreqcnt)
- mask |= EPOLLIN;
- goto exit;
- }
- }
-
- /* Endpoint is connected or disconnected */
- if (ep->state == SCIFEP_CONNECTED || ep->state == SCIFEP_DISCONNECTED) {
- if (poll_requested_events(wait) & EPOLLIN)
- _scif_poll_wait(f, &ep->recvwq, wait, ep);
- if (poll_requested_events(wait) & EPOLLOUT)
- _scif_poll_wait(f, &ep->sendwq, wait, ep);
- if (ep->state == SCIFEP_CONNECTED ||
- ep->state == SCIFEP_DISCONNECTED) {
- /* Data can be read without blocking */
- if (scif_rb_count(&ep->qp_info.qp->inbound_q, 1))
- mask |= EPOLLIN;
- /* Data can be written without blocking */
- if (scif_rb_space(&ep->qp_info.qp->outbound_q))
- mask |= EPOLLOUT;
- /* Return EPOLLHUP if endpoint is disconnected */
- if (ep->state == SCIFEP_DISCONNECTED)
- mask |= EPOLLHUP;
- goto exit;
- }
- }
-
- /* Return EPOLLERR if the endpoint is in none of the above states */
- mask |= EPOLLERR;
-exit:
- spin_unlock(&ep->lock);
- return mask;
-}
-
-/**
- * scif_poll() - Kernel mode SCIF poll
- * @ufds: Array of scif_pollepd structures containing the end points
- * and events to poll on
- * @nfds: Size of the ufds array
- * @timeout_msecs: Timeout in msecs, -ve implies infinite timeout
- *
- * The code flow in this function is based on do_poll(..) in select.c
- *
- * Returns the number of endpoints which have pending events or 0 in
- * the event of a timeout. If a signal is used for wake up, -EINTR is
- * returned.
- */
-int
-scif_poll(struct scif_pollepd *ufds, unsigned int nfds, long timeout_msecs)
-{
- struct poll_wqueues table;
- poll_table *pt;
- int i, count = 0, timed_out = timeout_msecs == 0;
- __poll_t mask;
- u64 timeout = timeout_msecs < 0 ? MAX_SCHEDULE_TIMEOUT
- : msecs_to_jiffies(timeout_msecs);
-
- poll_initwait(&table);
- pt = &table.pt;
- while (1) {
- for (i = 0; i < nfds; i++) {
- pt->_key = ufds[i].events | EPOLLERR | EPOLLHUP;
- mask = __scif_pollfd(ufds[i].epd->anon,
- pt, ufds[i].epd);
- mask &= ufds[i].events | EPOLLERR | EPOLLHUP;
- if (mask) {
- count++;
- pt->_qproc = NULL;
- }
- ufds[i].revents = mask;
- }
- pt->_qproc = NULL;
- if (!count) {
- count = table.error;
- if (signal_pending(current))
- count = -EINTR;
- }
- if (count || timed_out)
- break;
-
- if (!schedule_timeout_interruptible(timeout))
- timed_out = 1;
- }
- poll_freewait(&table);
- return count;
-}
-EXPORT_SYMBOL_GPL(scif_poll);
-
-int scif_get_node_ids(u16 *nodes, int len, u16 *self)
-{
- int online = 0;
- int offset = 0;
- int node;
-
- if (!scif_is_mgmt_node())
- scif_get_node_info();
-
- *self = scif_info.nodeid;
- mutex_lock(&scif_info.conflock);
- len = min_t(int, len, scif_info.total);
- for (node = 0; node <= scif_info.maxid; node++) {
- if (_scifdev_alive(&scif_dev[node])) {
- online++;
- if (offset < len)
- nodes[offset++] = node;
- }
- }
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI get_node_ids total %d online %d filled in %d nodes\n",
- scif_info.total, online, offset);
- mutex_unlock(&scif_info.conflock);
-
- return online;
-}
-EXPORT_SYMBOL_GPL(scif_get_node_ids);
-
-static int scif_add_client_dev(struct device *dev, struct subsys_interface *si)
-{
- struct scif_client *client =
- container_of(si, struct scif_client, si);
- struct scif_peer_dev *spdev =
- container_of(dev, struct scif_peer_dev, dev);
-
- if (client->probe)
- client->probe(spdev);
- return 0;
-}
-
-static void scif_remove_client_dev(struct device *dev,
- struct subsys_interface *si)
-{
- struct scif_client *client =
- container_of(si, struct scif_client, si);
- struct scif_peer_dev *spdev =
- container_of(dev, struct scif_peer_dev, dev);
-
- if (client->remove)
- client->remove(spdev);
-}
-
-void scif_client_unregister(struct scif_client *client)
-{
- subsys_interface_unregister(&client->si);
-}
-EXPORT_SYMBOL_GPL(scif_client_unregister);
-
-int scif_client_register(struct scif_client *client)
-{
- struct subsys_interface *si = &client->si;
-
- si->name = client->name;
- si->subsys = &scif_peer_bus;
- si->add_dev = scif_add_client_dev;
- si->remove_dev = scif_remove_client_dev;
-
- return subsys_interface_register(&client->si);
-}
-EXPORT_SYMBOL_GPL(scif_client_register);
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-
-#include "../common/mic_dev.h"
-#include "scif_main.h"
-
-/* Debugfs parent dir */
-static struct dentry *scif_dbg;
-
-static int scif_dev_show(struct seq_file *s, void *unused)
-{
- int node;
-
- seq_printf(s, "Total Nodes %d Self Node Id %d Maxid %d\n",
- scif_info.total, scif_info.nodeid,
- scif_info.maxid);
-
- if (!scif_dev)
- return 0;
-
- seq_printf(s, "%-16s\t%-16s\n", "node_id", "state");
-
- for (node = 0; node <= scif_info.maxid; node++)
- seq_printf(s, "%-16d\t%-16s\n", scif_dev[node].node,
- _scifdev_alive(&scif_dev[node]) ?
- "Running" : "Offline");
- return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(scif_dev);
-
-static void scif_display_window(struct scif_window *window, struct seq_file *s)
-{
- int j;
- struct scatterlist *sg;
- scif_pinned_pages_t pin = window->pinned_pages;
-
- seq_printf(s, "window %p type %d temp %d offset 0x%llx ",
- window, window->type, window->temp, window->offset);
- seq_printf(s, "nr_pages 0x%llx nr_contig_chunks 0x%x prot %d ",
- window->nr_pages, window->nr_contig_chunks, window->prot);
- seq_printf(s, "ref_count %d magic 0x%llx peer_window 0x%llx ",
- window->ref_count, window->magic, window->peer_window);
- seq_printf(s, "unreg_state 0x%x va_for_temp 0x%lx\n",
- window->unreg_state, window->va_for_temp);
-
- for (j = 0; j < window->nr_contig_chunks; j++)
- seq_printf(s, "page[%d] dma_addr 0x%llx num_pages 0x%llx\n", j,
- window->dma_addr[j], window->num_pages[j]);
-
- if (window->type == SCIF_WINDOW_SELF && pin)
- for (j = 0; j < window->nr_pages; j++)
- seq_printf(s, "page[%d] = pinned_pages %p address %p\n",
- j, pin->pages[j],
- page_address(pin->pages[j]));
-
- if (window->st)
- for_each_sg(window->st->sgl, sg, window->st->nents, j)
- seq_printf(s, "sg[%d] dma addr 0x%llx length 0x%x\n",
- j, sg_dma_address(sg), sg_dma_len(sg));
-}
-
-static void scif_display_all_windows(struct list_head *head, struct seq_file *s)
-{
- struct list_head *item;
- struct scif_window *window;
-
- list_for_each(item, head) {
- window = list_entry(item, struct scif_window, list);
- scif_display_window(window, s);
- }
-}
-
-static int scif_rma_show(struct seq_file *s, void *unused)
-{
- struct scif_endpt *ep;
- struct list_head *pos;
-
- mutex_lock(&scif_info.connlock);
- list_for_each(pos, &scif_info.connected) {
- ep = list_entry(pos, struct scif_endpt, list);
- seq_printf(s, "ep %p self windows\n", ep);
- mutex_lock(&ep->rma_info.rma_lock);
- scif_display_all_windows(&ep->rma_info.reg_list, s);
- seq_printf(s, "ep %p remote windows\n", ep);
- scif_display_all_windows(&ep->rma_info.remote_reg_list, s);
- mutex_unlock(&ep->rma_info.rma_lock);
- }
- mutex_unlock(&scif_info.connlock);
- return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(scif_rma);
-
-void __init scif_init_debugfs(void)
-{
- scif_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
-
- debugfs_create_file("scif_dev", 0444, scif_dbg, NULL, &scif_dev_fops);
- debugfs_create_file("scif_rma", 0444, scif_dbg, NULL, &scif_rma_fops);
- debugfs_create_u8("en_msg_log", 0666, scif_dbg, &scif_info.en_msg_log);
- debugfs_create_u8("p2p_enable", 0666, scif_dbg, &scif_info.p2p_enable);
-}
-
-void scif_exit_debugfs(void)
-{
- debugfs_remove_recursive(scif_dbg);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2015 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#include "scif_main.h"
-#include "scif_map.h"
-
-/*
- * struct scif_dma_comp_cb - SCIF DMA completion callback
- *
- * @dma_completion_func: DMA completion callback
- * @cb_cookie: DMA completion callback cookie
- * @temp_buf: Temporary buffer
- * @temp_buf_to_free: Temporary buffer to be freed
- * @is_cache: Is a kmem_cache allocated buffer
- * @dst_offset: Destination registration offset
- * @dst_window: Destination registration window
- * @len: Length of the temp buffer
- * @temp_phys: DMA address of the temp buffer
- * @sdev: The SCIF device
- * @header_padding: padding for cache line alignment
- */
-struct scif_dma_comp_cb {
- void (*dma_completion_func)(void *cookie);
- void *cb_cookie;
- u8 *temp_buf;
- u8 *temp_buf_to_free;
- bool is_cache;
- s64 dst_offset;
- struct scif_window *dst_window;
- size_t len;
- dma_addr_t temp_phys;
- struct scif_dev *sdev;
- int header_padding;
-};
-
-/**
- * struct scif_copy_work - Work for DMA copy
- *
- * @src_offset: Starting source offset
- * @dst_offset: Starting destination offset
- * @src_window: Starting src registered window
- * @dst_window: Starting dst registered window
- * @loopback: true if this is a loopback DMA transfer
- * @len: Length of the transfer
- * @comp_cb: DMA copy completion callback
- * @remote_dev: The remote SCIF peer device
- * @fence_type: polling or interrupt based
- * @ordered: is this a tail byte ordered DMA transfer
- */
-struct scif_copy_work {
- s64 src_offset;
- s64 dst_offset;
- struct scif_window *src_window;
- struct scif_window *dst_window;
- int loopback;
- size_t len;
- struct scif_dma_comp_cb *comp_cb;
- struct scif_dev *remote_dev;
- int fence_type;
- bool ordered;
-};
-
-/**
- * scif_reserve_dma_chan:
- * @ep: Endpoint Descriptor.
- *
- * This routine reserves a DMA channel for a particular
- * endpoint. All DMA transfers for an endpoint are always
- * programmed on the same DMA channel.
- */
-int scif_reserve_dma_chan(struct scif_endpt *ep)
-{
- int err = 0;
- struct scif_dev *scifdev;
- struct scif_hw_dev *sdev;
- struct dma_chan *chan;
-
- /* Loopback DMAs are not supported on the management node */
- if (!scif_info.nodeid && scifdev_self(ep->remote_dev))
- return 0;
- if (scif_info.nodeid)
- scifdev = &scif_dev[0];
- else
- scifdev = ep->remote_dev;
- sdev = scifdev->sdev;
- if (!sdev->num_dma_ch)
- return -ENODEV;
- chan = sdev->dma_ch[scifdev->dma_ch_idx];
- scifdev->dma_ch_idx = (scifdev->dma_ch_idx + 1) % sdev->num_dma_ch;
- mutex_lock(&ep->rma_info.rma_lock);
- ep->rma_info.dma_chan = chan;
- mutex_unlock(&ep->rma_info.rma_lock);
- return err;
-}
-
-#ifdef CONFIG_MMU_NOTIFIER
-/*
- * scif_rma_destroy_tcw:
- *
- * This routine destroys temporary cached windows
- */
-static
-void __scif_rma_destroy_tcw(struct scif_mmu_notif *mmn,
- u64 start, u64 len)
-{
- struct list_head *item, *tmp;
- struct scif_window *window;
- u64 start_va, end_va;
- u64 end = start + len;
-
- if (end <= start)
- return;
-
- list_for_each_safe(item, tmp, &mmn->tc_reg_list) {
- window = list_entry(item, struct scif_window, list);
- if (!len)
- break;
- start_va = window->va_for_temp;
- end_va = start_va + (window->nr_pages << PAGE_SHIFT);
- if (start < start_va && end <= start_va)
- break;
- if (start >= end_va)
- continue;
- __scif_rma_destroy_tcw_helper(window);
- }
-}
-
-static void scif_rma_destroy_tcw(struct scif_mmu_notif *mmn, u64 start, u64 len)
-{
- struct scif_endpt *ep = mmn->ep;
-
- spin_lock(&ep->rma_info.tc_lock);
- __scif_rma_destroy_tcw(mmn, start, len);
- spin_unlock(&ep->rma_info.tc_lock);
-}
-
-static void scif_rma_destroy_tcw_ep(struct scif_endpt *ep)
-{
- struct list_head *item, *tmp;
- struct scif_mmu_notif *mmn;
-
- list_for_each_safe(item, tmp, &ep->rma_info.mmn_list) {
- mmn = list_entry(item, struct scif_mmu_notif, list);
- scif_rma_destroy_tcw(mmn, 0, ULONG_MAX);
- }
-}
-
-static void __scif_rma_destroy_tcw_ep(struct scif_endpt *ep)
-{
- struct list_head *item, *tmp;
- struct scif_mmu_notif *mmn;
-
- spin_lock(&ep->rma_info.tc_lock);
- list_for_each_safe(item, tmp, &ep->rma_info.mmn_list) {
- mmn = list_entry(item, struct scif_mmu_notif, list);
- __scif_rma_destroy_tcw(mmn, 0, ULONG_MAX);
- }
- spin_unlock(&ep->rma_info.tc_lock);
-}
-
-static bool scif_rma_tc_can_cache(struct scif_endpt *ep, size_t cur_bytes)
-{
- if ((cur_bytes >> PAGE_SHIFT) > scif_info.rma_tc_limit)
- return false;
- if ((atomic_read(&ep->rma_info.tcw_total_pages)
- + (cur_bytes >> PAGE_SHIFT)) >
- scif_info.rma_tc_limit) {
- dev_info(scif_info.mdev.this_device,
- "%s %d total=%d, current=%zu reached max\n",
- __func__, __LINE__,
- atomic_read(&ep->rma_info.tcw_total_pages),
- (1 + (cur_bytes >> PAGE_SHIFT)));
- scif_rma_destroy_tcw_invalid();
- __scif_rma_destroy_tcw_ep(ep);
- }
- return true;
-}
-
-static void scif_mmu_notifier_release(struct mmu_notifier *mn,
- struct mm_struct *mm)
-{
- struct scif_mmu_notif *mmn;
-
- mmn = container_of(mn, struct scif_mmu_notif, ep_mmu_notifier);
- scif_rma_destroy_tcw(mmn, 0, ULONG_MAX);
- schedule_work(&scif_info.misc_work);
-}
-
-static int scif_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn,
- const struct mmu_notifier_range *range)
-{
- struct scif_mmu_notif *mmn;
-
- mmn = container_of(mn, struct scif_mmu_notif, ep_mmu_notifier);
- scif_rma_destroy_tcw(mmn, range->start, range->end - range->start);
-
- return 0;
-}
-
-static void scif_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn,
- const struct mmu_notifier_range *range)
-{
- /*
- * Nothing to do here, everything needed was done in
- * invalidate_range_start.
- */
-}
-
-static const struct mmu_notifier_ops scif_mmu_notifier_ops = {
- .release = scif_mmu_notifier_release,
- .clear_flush_young = NULL,
- .invalidate_range_start = scif_mmu_notifier_invalidate_range_start,
- .invalidate_range_end = scif_mmu_notifier_invalidate_range_end};
-
-static void scif_ep_unregister_mmu_notifier(struct scif_endpt *ep)
-{
- struct scif_endpt_rma_info *rma = &ep->rma_info;
- struct scif_mmu_notif *mmn = NULL;
- struct list_head *item, *tmp;
-
- mutex_lock(&ep->rma_info.mmn_lock);
- list_for_each_safe(item, tmp, &rma->mmn_list) {
- mmn = list_entry(item, struct scif_mmu_notif, list);
- mmu_notifier_unregister(&mmn->ep_mmu_notifier, mmn->mm);
- list_del(item);
- kfree(mmn);
- }
- mutex_unlock(&ep->rma_info.mmn_lock);
-}
-
-static void scif_init_mmu_notifier(struct scif_mmu_notif *mmn,
- struct mm_struct *mm, struct scif_endpt *ep)
-{
- mmn->ep = ep;
- mmn->mm = mm;
- mmn->ep_mmu_notifier.ops = &scif_mmu_notifier_ops;
- INIT_LIST_HEAD(&mmn->list);
- INIT_LIST_HEAD(&mmn->tc_reg_list);
-}
-
-static struct scif_mmu_notif *
-scif_find_mmu_notifier(struct mm_struct *mm, struct scif_endpt_rma_info *rma)
-{
- struct scif_mmu_notif *mmn;
-
- list_for_each_entry(mmn, &rma->mmn_list, list)
- if (mmn->mm == mm)
- return mmn;
- return NULL;
-}
-
-static struct scif_mmu_notif *
-scif_add_mmu_notifier(struct mm_struct *mm, struct scif_endpt *ep)
-{
- struct scif_mmu_notif *mmn
- = kzalloc(sizeof(*mmn), GFP_KERNEL);
-
- if (!mmn)
- return ERR_PTR(-ENOMEM);
-
- scif_init_mmu_notifier(mmn, current->mm, ep);
- if (mmu_notifier_register(&mmn->ep_mmu_notifier, current->mm)) {
- kfree(mmn);
- return ERR_PTR(-EBUSY);
- }
- list_add(&mmn->list, &ep->rma_info.mmn_list);
- return mmn;
-}
-
-/*
- * Called from the misc thread to destroy temporary cached windows and
- * unregister the MMU notifier for the SCIF endpoint.
- */
-void scif_mmu_notif_handler(struct work_struct *work)
-{
- struct list_head *pos, *tmpq;
- struct scif_endpt *ep;
-restart:
- scif_rma_destroy_tcw_invalid();
- spin_lock(&scif_info.rmalock);
- list_for_each_safe(pos, tmpq, &scif_info.mmu_notif_cleanup) {
- ep = list_entry(pos, struct scif_endpt, mmu_list);
- list_del(&ep->mmu_list);
- spin_unlock(&scif_info.rmalock);
- scif_rma_destroy_tcw_ep(ep);
- scif_ep_unregister_mmu_notifier(ep);
- goto restart;
- }
- spin_unlock(&scif_info.rmalock);
-}
-
-static bool scif_is_set_reg_cache(int flags)
-{
- return !!(flags & SCIF_RMA_USECACHE);
-}
-#else
-static struct scif_mmu_notif *
-scif_find_mmu_notifier(struct mm_struct *mm,
- struct scif_endpt_rma_info *rma)
-{
- return NULL;
-}
-
-static struct scif_mmu_notif *
-scif_add_mmu_notifier(struct mm_struct *mm, struct scif_endpt *ep)
-{
- return NULL;
-}
-
-void scif_mmu_notif_handler(struct work_struct *work)
-{
-}
-
-static bool scif_is_set_reg_cache(int flags)
-{
- return false;
-}
-
-static bool scif_rma_tc_can_cache(struct scif_endpt *ep, size_t cur_bytes)
-{
- return false;
-}
-#endif
-
-/**
- * scif_register_temp:
- * @epd: End Point Descriptor.
- * @addr: virtual address to/from which to copy
- * @len: length of range to copy
- * @prot: read/write protection
- * @out_offset: computed offset returned by reference.
- * @out_window: allocated registered window returned by reference.
- *
- * Create a temporary registered window. The peer will not know about this
- * window. This API is used for scif_vreadfrom()/scif_vwriteto() API's.
- */
-static int
-scif_register_temp(scif_epd_t epd, unsigned long addr, size_t len, int prot,
- off_t *out_offset, struct scif_window **out_window)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- int err;
- scif_pinned_pages_t pinned_pages;
- size_t aligned_len;
-
- aligned_len = ALIGN(len, PAGE_SIZE);
-
- err = __scif_pin_pages((void *)(addr & PAGE_MASK),
- aligned_len, &prot, 0, &pinned_pages);
- if (err)
- return err;
-
- pinned_pages->prot = prot;
-
- /* Compute the offset for this registration */
- err = scif_get_window_offset(ep, 0, 0,
- aligned_len >> PAGE_SHIFT,
- (s64 *)out_offset);
- if (err)
- goto error_unpin;
-
- /* Allocate and prepare self registration window */
- *out_window = scif_create_window(ep, aligned_len >> PAGE_SHIFT,
- *out_offset, true);
- if (!*out_window) {
- scif_free_window_offset(ep, NULL, *out_offset);
- err = -ENOMEM;
- goto error_unpin;
- }
-
- (*out_window)->pinned_pages = pinned_pages;
- (*out_window)->nr_pages = pinned_pages->nr_pages;
- (*out_window)->prot = pinned_pages->prot;
-
- (*out_window)->va_for_temp = addr & PAGE_MASK;
- err = scif_map_window(ep->remote_dev, *out_window);
- if (err) {
- /* Something went wrong! Rollback */
- scif_destroy_window(ep, *out_window);
- *out_window = NULL;
- } else {
- *out_offset |= (addr - (*out_window)->va_for_temp);
- }
- return err;
-error_unpin:
- if (err)
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %d\n", __func__, __LINE__, err);
- scif_unpin_pages(pinned_pages);
- return err;
-}
-
-#define SCIF_DMA_TO (3 * HZ)
-
-/*
- * scif_sync_dma - Program a DMA without an interrupt descriptor
- *
- * @dev - The address of the pointer to the device instance used
- * for DMA registration.
- * @chan - DMA channel to be used.
- * @sync_wait: Wait for DMA to complete?
- *
- * Return 0 on success and -errno on error.
- */
-static int scif_sync_dma(struct scif_hw_dev *sdev, struct dma_chan *chan,
- bool sync_wait)
-{
- int err = 0;
- struct dma_async_tx_descriptor *tx = NULL;
- enum dma_ctrl_flags flags = DMA_PREP_FENCE;
- dma_cookie_t cookie;
- struct dma_device *ddev;
-
- if (!chan) {
- err = -EIO;
- dev_err(&sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- return err;
- }
- ddev = chan->device;
-
- tx = ddev->device_prep_dma_memcpy(chan, 0, 0, 0, flags);
- if (!tx) {
- err = -ENOMEM;
- dev_err(&sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- goto release;
- }
- cookie = tx->tx_submit(tx);
-
- if (dma_submit_error(cookie)) {
- err = -ENOMEM;
- dev_err(&sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- goto release;
- }
- if (!sync_wait) {
- dma_async_issue_pending(chan);
- } else {
- if (dma_sync_wait(chan, cookie) == DMA_COMPLETE) {
- err = 0;
- } else {
- err = -EIO;
- dev_err(&sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- }
- }
-release:
- return err;
-}
-
-static void scif_dma_callback(void *arg)
-{
- struct completion *done = (struct completion *)arg;
-
- complete(done);
-}
-
-#define SCIF_DMA_SYNC_WAIT true
-#define SCIF_DMA_POLL BIT(0)
-#define SCIF_DMA_INTR BIT(1)
-
-/*
- * scif_async_dma - Program a DMA with an interrupt descriptor
- *
- * @dev - The address of the pointer to the device instance used
- * for DMA registration.
- * @chan - DMA channel to be used.
- * Return 0 on success and -errno on error.
- */
-static int scif_async_dma(struct scif_hw_dev *sdev, struct dma_chan *chan)
-{
- int err = 0;
- struct dma_device *ddev;
- struct dma_async_tx_descriptor *tx = NULL;
- enum dma_ctrl_flags flags = DMA_PREP_INTERRUPT | DMA_PREP_FENCE;
- DECLARE_COMPLETION_ONSTACK(done_wait);
- dma_cookie_t cookie;
- enum dma_status status;
-
- if (!chan) {
- err = -EIO;
- dev_err(&sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- return err;
- }
- ddev = chan->device;
-
- tx = ddev->device_prep_dma_memcpy(chan, 0, 0, 0, flags);
- if (!tx) {
- err = -ENOMEM;
- dev_err(&sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- goto release;
- }
- reinit_completion(&done_wait);
- tx->callback = scif_dma_callback;
- tx->callback_param = &done_wait;
- cookie = tx->tx_submit(tx);
-
- if (dma_submit_error(cookie)) {
- err = -ENOMEM;
- dev_err(&sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- goto release;
- }
- dma_async_issue_pending(chan);
-
- err = wait_for_completion_timeout(&done_wait, SCIF_DMA_TO);
- if (!err) {
- err = -EIO;
- dev_err(&sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- goto release;
- }
- err = 0;
- status = dma_async_is_tx_complete(chan, cookie, NULL, NULL);
- if (status != DMA_COMPLETE) {
- err = -EIO;
- dev_err(&sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- goto release;
- }
-release:
- return err;
-}
-
-/*
- * scif_drain_dma_poll - Drain all outstanding DMA operations for a particular
- * DMA channel via polling.
- *
- * @sdev - The SCIF device
- * @chan - DMA channel
- * Return 0 on success and -errno on error.
- */
-static int scif_drain_dma_poll(struct scif_hw_dev *sdev, struct dma_chan *chan)
-{
- if (!chan)
- return -EINVAL;
- return scif_sync_dma(sdev, chan, SCIF_DMA_SYNC_WAIT);
-}
-
-/*
- * scif_drain_dma_intr - Drain all outstanding DMA operations for a particular
- * DMA channel via interrupt based blocking wait.
- *
- * @sdev - The SCIF device
- * @chan - DMA channel
- * Return 0 on success and -errno on error.
- */
-int scif_drain_dma_intr(struct scif_hw_dev *sdev, struct dma_chan *chan)
-{
- if (!chan)
- return -EINVAL;
- return scif_async_dma(sdev, chan);
-}
-
-/**
- * scif_rma_destroy_windows:
- *
- * This routine destroys all windows queued for cleanup
- */
-void scif_rma_destroy_windows(void)
-{
- struct list_head *item, *tmp;
- struct scif_window *window;
- struct scif_endpt *ep;
- struct dma_chan *chan;
-
- might_sleep();
-restart:
- spin_lock(&scif_info.rmalock);
- list_for_each_safe(item, tmp, &scif_info.rma) {
- window = list_entry(item, struct scif_window,
- list);
- ep = (struct scif_endpt *)window->ep;
- chan = ep->rma_info.dma_chan;
-
- list_del_init(&window->list);
- spin_unlock(&scif_info.rmalock);
- if (!chan || !scifdev_alive(ep) ||
- !scif_drain_dma_intr(ep->remote_dev->sdev,
- ep->rma_info.dma_chan))
- /* Remove window from global list */
- window->unreg_state = OP_COMPLETED;
- else
- dev_warn(&ep->remote_dev->sdev->dev,
- "DMA engine hung?\n");
- if (window->unreg_state == OP_COMPLETED) {
- if (window->type == SCIF_WINDOW_SELF)
- scif_destroy_window(ep, window);
- else
- scif_destroy_remote_window(window);
- atomic_dec(&ep->rma_info.tw_refcount);
- }
- goto restart;
- }
- spin_unlock(&scif_info.rmalock);
-}
-
-/**
- * scif_rma_destroy_tcw:
- *
- * This routine destroys temporary cached registered windows
- * which have been queued for cleanup.
- */
-void scif_rma_destroy_tcw_invalid(void)
-{
- struct list_head *item, *tmp;
- struct scif_window *window;
- struct scif_endpt *ep;
- struct dma_chan *chan;
-
- might_sleep();
-restart:
- spin_lock(&scif_info.rmalock);
- list_for_each_safe(item, tmp, &scif_info.rma_tc) {
- window = list_entry(item, struct scif_window, list);
- ep = (struct scif_endpt *)window->ep;
- chan = ep->rma_info.dma_chan;
- list_del_init(&window->list);
- spin_unlock(&scif_info.rmalock);
- mutex_lock(&ep->rma_info.rma_lock);
- if (!chan || !scifdev_alive(ep) ||
- !scif_drain_dma_intr(ep->remote_dev->sdev,
- ep->rma_info.dma_chan)) {
- atomic_sub(window->nr_pages,
- &ep->rma_info.tcw_total_pages);
- scif_destroy_window(ep, window);
- atomic_dec(&ep->rma_info.tcw_refcount);
- } else {
- dev_warn(&ep->remote_dev->sdev->dev,
- "DMA engine hung?\n");
- }
- mutex_unlock(&ep->rma_info.rma_lock);
- goto restart;
- }
- spin_unlock(&scif_info.rmalock);
-}
-
-static inline
-void *_get_local_va(off_t off, struct scif_window *window, size_t len)
-{
- int page_nr = (off - window->offset) >> PAGE_SHIFT;
- off_t page_off = off & ~PAGE_MASK;
- void *va = NULL;
-
- if (window->type == SCIF_WINDOW_SELF) {
- struct page **pages = window->pinned_pages->pages;
-
- va = page_address(pages[page_nr]) + page_off;
- }
- return va;
-}
-
-static inline
-void *ioremap_remote(off_t off, struct scif_window *window,
- size_t len, struct scif_dev *dev,
- struct scif_window_iter *iter)
-{
- dma_addr_t phys = scif_off_to_dma_addr(window, off, NULL, iter);
-
- /*
- * If the DMA address is not card relative then we need the DMA
- * addresses to be an offset into the bar. The aperture base was already
- * added so subtract it here since scif_ioremap is going to add it again
- */
- if (!scifdev_self(dev) && window->type == SCIF_WINDOW_PEER &&
- dev->sdev->aper && !dev->sdev->card_rel_da)
- phys = phys - dev->sdev->aper->pa;
- return scif_ioremap(phys, len, dev);
-}
-
-static inline void
-iounmap_remote(void *virt, size_t size, struct scif_copy_work *work)
-{
- scif_iounmap(virt, size, work->remote_dev);
-}
-
-/*
- * Takes care of ordering issue caused by
- * 1. Hardware: Only in the case of cpu copy from mgmt node to card
- * because of WC memory.
- * 2. Software: If memcpy reorders copy instructions for optimization.
- * This could happen at both mgmt node and card.
- */
-static inline void
-scif_ordered_memcpy_toio(char *dst, const char *src, size_t count)
-{
- if (!count)
- return;
-
- memcpy_toio((void __iomem __force *)dst, src, --count);
- /* Order the last byte with the previous stores */
- wmb();
- *(dst + count) = *(src + count);
-}
-
-static inline void scif_unaligned_cpy_toio(char *dst, const char *src,
- size_t count, bool ordered)
-{
- if (ordered)
- scif_ordered_memcpy_toio(dst, src, count);
- else
- memcpy_toio((void __iomem __force *)dst, src, count);
-}
-
-static inline
-void scif_ordered_memcpy_fromio(char *dst, const char *src, size_t count)
-{
- if (!count)
- return;
-
- memcpy_fromio(dst, (void __iomem __force *)src, --count);
- /* Order the last byte with the previous loads */
- rmb();
- *(dst + count) = *(src + count);
-}
-
-static inline void scif_unaligned_cpy_fromio(char *dst, const char *src,
- size_t count, bool ordered)
-{
- if (ordered)
- scif_ordered_memcpy_fromio(dst, src, count);
- else
- memcpy_fromio(dst, (void __iomem __force *)src, count);
-}
-
-#define SCIF_RMA_ERROR_CODE (~(dma_addr_t)0x0)
-
-/*
- * scif_off_to_dma_addr:
- * Obtain the dma_addr given the window and the offset.
- * @window: Registered window.
- * @off: Window offset.
- * @nr_bytes: Return the number of contiguous bytes till next DMA addr index.
- * @index: Return the index of the dma_addr array found.
- * @start_off: start offset of index of the dma addr array found.
- * The nr_bytes provides the callee an estimate of the maximum possible
- * DMA xfer possible while the index/start_off provide faster lookups
- * for the next iteration.
- */
-dma_addr_t scif_off_to_dma_addr(struct scif_window *window, s64 off,
- size_t *nr_bytes, struct scif_window_iter *iter)
-{
- int i, page_nr;
- s64 start, end;
- off_t page_off;
-
- if (window->nr_pages == window->nr_contig_chunks) {
- page_nr = (off - window->offset) >> PAGE_SHIFT;
- page_off = off & ~PAGE_MASK;
-
- if (nr_bytes)
- *nr_bytes = PAGE_SIZE - page_off;
- return window->dma_addr[page_nr] | page_off;
- }
- if (iter) {
- i = iter->index;
- start = iter->offset;
- } else {
- i = 0;
- start = window->offset;
- }
- for (; i < window->nr_contig_chunks; i++) {
- end = start + (window->num_pages[i] << PAGE_SHIFT);
- if (off >= start && off < end) {
- if (iter) {
- iter->index = i;
- iter->offset = start;
- }
- if (nr_bytes)
- *nr_bytes = end - off;
- return (window->dma_addr[i] + (off - start));
- }
- start += (window->num_pages[i] << PAGE_SHIFT);
- }
- dev_err(scif_info.mdev.this_device,
- "%s %d BUG. Addr not found? window %p off 0x%llx\n",
- __func__, __LINE__, window, off);
- return SCIF_RMA_ERROR_CODE;
-}
-
-/*
- * Copy between rma window and temporary buffer
- */
-static void scif_rma_local_cpu_copy(s64 offset, struct scif_window *window,
- u8 *temp, size_t rem_len, bool to_temp)
-{
- void *window_virt;
- size_t loop_len;
- int offset_in_page;
- s64 end_offset;
-
- offset_in_page = offset & ~PAGE_MASK;
- loop_len = PAGE_SIZE - offset_in_page;
-
- if (rem_len < loop_len)
- loop_len = rem_len;
-
- window_virt = _get_local_va(offset, window, loop_len);
- if (!window_virt)
- return;
- if (to_temp)
- memcpy(temp, window_virt, loop_len);
- else
- memcpy(window_virt, temp, loop_len);
-
- offset += loop_len;
- temp += loop_len;
- rem_len -= loop_len;
-
- end_offset = window->offset +
- (window->nr_pages << PAGE_SHIFT);
- while (rem_len) {
- if (offset == end_offset) {
- window = list_next_entry(window, list);
- end_offset = window->offset +
- (window->nr_pages << PAGE_SHIFT);
- }
- loop_len = min(PAGE_SIZE, rem_len);
- window_virt = _get_local_va(offset, window, loop_len);
- if (!window_virt)
- return;
- if (to_temp)
- memcpy(temp, window_virt, loop_len);
- else
- memcpy(window_virt, temp, loop_len);
- offset += loop_len;
- temp += loop_len;
- rem_len -= loop_len;
- }
-}
-
-/**
- * scif_rma_completion_cb:
- * @data: RMA cookie
- *
- * RMA interrupt completion callback.
- */
-static void scif_rma_completion_cb(void *data)
-{
- struct scif_dma_comp_cb *comp_cb = data;
-
- /* Free DMA Completion CB. */
- if (comp_cb->dst_window)
- scif_rma_local_cpu_copy(comp_cb->dst_offset,
- comp_cb->dst_window,
- comp_cb->temp_buf +
- comp_cb->header_padding,
- comp_cb->len, false);
- scif_unmap_single(comp_cb->temp_phys, comp_cb->sdev,
- SCIF_KMEM_UNALIGNED_BUF_SIZE);
- if (comp_cb->is_cache)
- kmem_cache_free(unaligned_cache,
- comp_cb->temp_buf_to_free);
- else
- kfree(comp_cb->temp_buf_to_free);
-}
-
-/* Copies between temporary buffer and offsets provided in work */
-static int
-scif_rma_list_dma_copy_unaligned(struct scif_copy_work *work,
- u8 *temp, struct dma_chan *chan,
- bool src_local)
-{
- struct scif_dma_comp_cb *comp_cb = work->comp_cb;
- dma_addr_t window_dma_addr, temp_dma_addr;
- dma_addr_t temp_phys = comp_cb->temp_phys;
- size_t loop_len, nr_contig_bytes = 0, remaining_len = work->len;
- int offset_in_ca, ret = 0;
- s64 end_offset, offset;
- struct scif_window *window;
- void *window_virt_addr;
- size_t tail_len;
- struct dma_async_tx_descriptor *tx;
- struct dma_device *dev = chan->device;
- dma_cookie_t cookie;
-
- if (src_local) {
- offset = work->dst_offset;
- window = work->dst_window;
- } else {
- offset = work->src_offset;
- window = work->src_window;
- }
-
- offset_in_ca = offset & (L1_CACHE_BYTES - 1);
- if (offset_in_ca) {
- loop_len = L1_CACHE_BYTES - offset_in_ca;
- loop_len = min(loop_len, remaining_len);
- window_virt_addr = ioremap_remote(offset, window,
- loop_len,
- work->remote_dev,
- NULL);
- if (!window_virt_addr)
- return -ENOMEM;
- if (src_local)
- scif_unaligned_cpy_toio(window_virt_addr, temp,
- loop_len,
- work->ordered &&
- !(remaining_len - loop_len));
- else
- scif_unaligned_cpy_fromio(temp, window_virt_addr,
- loop_len, work->ordered &&
- !(remaining_len - loop_len));
- iounmap_remote(window_virt_addr, loop_len, work);
-
- offset += loop_len;
- temp += loop_len;
- temp_phys += loop_len;
- remaining_len -= loop_len;
- }
-
- offset_in_ca = offset & ~PAGE_MASK;
- end_offset = window->offset +
- (window->nr_pages << PAGE_SHIFT);
-
- tail_len = remaining_len & (L1_CACHE_BYTES - 1);
- remaining_len -= tail_len;
- while (remaining_len) {
- if (offset == end_offset) {
- window = list_next_entry(window, list);
- end_offset = window->offset +
- (window->nr_pages << PAGE_SHIFT);
- }
- if (scif_is_mgmt_node())
- temp_dma_addr = temp_phys;
- else
- /* Fix if we ever enable IOMMU on the card */
- temp_dma_addr = (dma_addr_t)virt_to_phys(temp);
- window_dma_addr = scif_off_to_dma_addr(window, offset,
- &nr_contig_bytes,
- NULL);
- loop_len = min(nr_contig_bytes, remaining_len);
- if (src_local) {
- if (work->ordered && !tail_len &&
- !(remaining_len - loop_len) &&
- loop_len != L1_CACHE_BYTES) {
- /*
- * Break up the last chunk of the transfer into
- * two steps. if there is no tail to guarantee
- * DMA ordering. SCIF_DMA_POLLING inserts
- * a status update descriptor in step 1 which
- * acts as a double sided synchronization fence
- * for the DMA engine to ensure that the last
- * cache line in step 2 is updated last.
- */
- /* Step 1) DMA: Body Length - L1_CACHE_BYTES. */
- tx =
- dev->device_prep_dma_memcpy(chan,
- window_dma_addr,
- temp_dma_addr,
- loop_len -
- L1_CACHE_BYTES,
- DMA_PREP_FENCE);
- if (!tx) {
- ret = -ENOMEM;
- goto err;
- }
- cookie = tx->tx_submit(tx);
- if (dma_submit_error(cookie)) {
- ret = -ENOMEM;
- goto err;
- }
- dma_async_issue_pending(chan);
- offset += (loop_len - L1_CACHE_BYTES);
- temp_dma_addr += (loop_len - L1_CACHE_BYTES);
- window_dma_addr += (loop_len - L1_CACHE_BYTES);
- remaining_len -= (loop_len - L1_CACHE_BYTES);
- loop_len = remaining_len;
-
- /* Step 2) DMA: L1_CACHE_BYTES */
- tx =
- dev->device_prep_dma_memcpy(chan,
- window_dma_addr,
- temp_dma_addr,
- loop_len, 0);
- if (!tx) {
- ret = -ENOMEM;
- goto err;
- }
- cookie = tx->tx_submit(tx);
- if (dma_submit_error(cookie)) {
- ret = -ENOMEM;
- goto err;
- }
- dma_async_issue_pending(chan);
- } else {
- tx =
- dev->device_prep_dma_memcpy(chan,
- window_dma_addr,
- temp_dma_addr,
- loop_len, 0);
- if (!tx) {
- ret = -ENOMEM;
- goto err;
- }
- cookie = tx->tx_submit(tx);
- if (dma_submit_error(cookie)) {
- ret = -ENOMEM;
- goto err;
- }
- dma_async_issue_pending(chan);
- }
- } else {
- tx = dev->device_prep_dma_memcpy(chan, temp_dma_addr,
- window_dma_addr, loop_len, 0);
- if (!tx) {
- ret = -ENOMEM;
- goto err;
- }
- cookie = tx->tx_submit(tx);
- if (dma_submit_error(cookie)) {
- ret = -ENOMEM;
- goto err;
- }
- dma_async_issue_pending(chan);
- }
- offset += loop_len;
- temp += loop_len;
- temp_phys += loop_len;
- remaining_len -= loop_len;
- offset_in_ca = 0;
- }
- if (tail_len) {
- if (offset == end_offset) {
- window = list_next_entry(window, list);
- end_offset = window->offset +
- (window->nr_pages << PAGE_SHIFT);
- }
- window_virt_addr = ioremap_remote(offset, window, tail_len,
- work->remote_dev,
- NULL);
- if (!window_virt_addr)
- return -ENOMEM;
- /*
- * The CPU copy for the tail bytes must be initiated only once
- * previous DMA transfers for this endpoint have completed
- * to guarantee ordering.
- */
- if (work->ordered) {
- struct scif_dev *rdev = work->remote_dev;
-
- ret = scif_drain_dma_intr(rdev->sdev, chan);
- if (ret)
- return ret;
- }
- if (src_local)
- scif_unaligned_cpy_toio(window_virt_addr, temp,
- tail_len, work->ordered);
- else
- scif_unaligned_cpy_fromio(temp, window_virt_addr,
- tail_len, work->ordered);
- iounmap_remote(window_virt_addr, tail_len, work);
- }
- tx = dev->device_prep_dma_memcpy(chan, 0, 0, 0, DMA_PREP_INTERRUPT);
- if (!tx) {
- ret = -ENOMEM;
- return ret;
- }
- tx->callback = &scif_rma_completion_cb;
- tx->callback_param = comp_cb;
- cookie = tx->tx_submit(tx);
-
- if (dma_submit_error(cookie)) {
- ret = -ENOMEM;
- return ret;
- }
- dma_async_issue_pending(chan);
- return 0;
-err:
- dev_err(scif_info.mdev.this_device,
- "%s %d Desc Prog Failed ret %d\n",
- __func__, __LINE__, ret);
- return ret;
-}
-
-/*
- * _scif_rma_list_dma_copy_aligned:
- *
- * Traverse all the windows and perform DMA copy.
- */
-static int _scif_rma_list_dma_copy_aligned(struct scif_copy_work *work,
- struct dma_chan *chan)
-{
- dma_addr_t src_dma_addr, dst_dma_addr;
- size_t loop_len, remaining_len, src_contig_bytes = 0;
- size_t dst_contig_bytes = 0;
- struct scif_window_iter src_win_iter;
- struct scif_window_iter dst_win_iter;
- s64 end_src_offset, end_dst_offset;
- struct scif_window *src_window = work->src_window;
- struct scif_window *dst_window = work->dst_window;
- s64 src_offset = work->src_offset, dst_offset = work->dst_offset;
- int ret = 0;
- struct dma_async_tx_descriptor *tx;
- struct dma_device *dev = chan->device;
- dma_cookie_t cookie;
-
- remaining_len = work->len;
-
- scif_init_window_iter(src_window, &src_win_iter);
- scif_init_window_iter(dst_window, &dst_win_iter);
- end_src_offset = src_window->offset +
- (src_window->nr_pages << PAGE_SHIFT);
- end_dst_offset = dst_window->offset +
- (dst_window->nr_pages << PAGE_SHIFT);
- while (remaining_len) {
- if (src_offset == end_src_offset) {
- src_window = list_next_entry(src_window, list);
- end_src_offset = src_window->offset +
- (src_window->nr_pages << PAGE_SHIFT);
- scif_init_window_iter(src_window, &src_win_iter);
- }
- if (dst_offset == end_dst_offset) {
- dst_window = list_next_entry(dst_window, list);
- end_dst_offset = dst_window->offset +
- (dst_window->nr_pages << PAGE_SHIFT);
- scif_init_window_iter(dst_window, &dst_win_iter);
- }
-
- /* compute dma addresses for transfer */
- src_dma_addr = scif_off_to_dma_addr(src_window, src_offset,
- &src_contig_bytes,
- &src_win_iter);
- dst_dma_addr = scif_off_to_dma_addr(dst_window, dst_offset,
- &dst_contig_bytes,
- &dst_win_iter);
- loop_len = min(src_contig_bytes, dst_contig_bytes);
- loop_len = min(loop_len, remaining_len);
- if (work->ordered && !(remaining_len - loop_len)) {
- /*
- * Break up the last chunk of the transfer into two
- * steps to ensure that the last byte in step 2 is
- * updated last.
- */
- /* Step 1) DMA: Body Length - 1 */
- tx = dev->device_prep_dma_memcpy(chan, dst_dma_addr,
- src_dma_addr,
- loop_len - 1,
- DMA_PREP_FENCE);
- if (!tx) {
- ret = -ENOMEM;
- goto err;
- }
- cookie = tx->tx_submit(tx);
- if (dma_submit_error(cookie)) {
- ret = -ENOMEM;
- goto err;
- }
- src_offset += (loop_len - 1);
- dst_offset += (loop_len - 1);
- src_dma_addr += (loop_len - 1);
- dst_dma_addr += (loop_len - 1);
- remaining_len -= (loop_len - 1);
- loop_len = remaining_len;
-
- /* Step 2) DMA: 1 BYTES */
- tx = dev->device_prep_dma_memcpy(chan, dst_dma_addr,
- src_dma_addr, loop_len, 0);
- if (!tx) {
- ret = -ENOMEM;
- goto err;
- }
- cookie = tx->tx_submit(tx);
- if (dma_submit_error(cookie)) {
- ret = -ENOMEM;
- goto err;
- }
- dma_async_issue_pending(chan);
- } else {
- tx = dev->device_prep_dma_memcpy(chan, dst_dma_addr,
- src_dma_addr, loop_len, 0);
- if (!tx) {
- ret = -ENOMEM;
- goto err;
- }
- cookie = tx->tx_submit(tx);
- if (dma_submit_error(cookie)) {
- ret = -ENOMEM;
- goto err;
- }
- }
- src_offset += loop_len;
- dst_offset += loop_len;
- remaining_len -= loop_len;
- }
- return ret;
-err:
- dev_err(scif_info.mdev.this_device,
- "%s %d Desc Prog Failed ret %d\n",
- __func__, __LINE__, ret);
- return ret;
-}
-
-/*
- * scif_rma_list_dma_copy_aligned:
- *
- * Traverse all the windows and perform DMA copy.
- */
-static int scif_rma_list_dma_copy_aligned(struct scif_copy_work *work,
- struct dma_chan *chan)
-{
- dma_addr_t src_dma_addr, dst_dma_addr;
- size_t loop_len, remaining_len, tail_len, src_contig_bytes = 0;
- size_t dst_contig_bytes = 0;
- int src_cache_off;
- s64 end_src_offset, end_dst_offset;
- struct scif_window_iter src_win_iter;
- struct scif_window_iter dst_win_iter;
- void *src_virt, *dst_virt;
- struct scif_window *src_window = work->src_window;
- struct scif_window *dst_window = work->dst_window;
- s64 src_offset = work->src_offset, dst_offset = work->dst_offset;
- int ret = 0;
- struct dma_async_tx_descriptor *tx;
- struct dma_device *dev = chan->device;
- dma_cookie_t cookie;
-
- remaining_len = work->len;
- scif_init_window_iter(src_window, &src_win_iter);
- scif_init_window_iter(dst_window, &dst_win_iter);
-
- src_cache_off = src_offset & (L1_CACHE_BYTES - 1);
- if (src_cache_off != 0) {
- /* Head */
- loop_len = L1_CACHE_BYTES - src_cache_off;
- loop_len = min(loop_len, remaining_len);
- src_dma_addr = __scif_off_to_dma_addr(src_window, src_offset);
- dst_dma_addr = __scif_off_to_dma_addr(dst_window, dst_offset);
- if (src_window->type == SCIF_WINDOW_SELF)
- src_virt = _get_local_va(src_offset, src_window,
- loop_len);
- else
- src_virt = ioremap_remote(src_offset, src_window,
- loop_len,
- work->remote_dev, NULL);
- if (!src_virt)
- return -ENOMEM;
- if (dst_window->type == SCIF_WINDOW_SELF)
- dst_virt = _get_local_va(dst_offset, dst_window,
- loop_len);
- else
- dst_virt = ioremap_remote(dst_offset, dst_window,
- loop_len,
- work->remote_dev, NULL);
- if (!dst_virt) {
- if (src_window->type != SCIF_WINDOW_SELF)
- iounmap_remote(src_virt, loop_len, work);
- return -ENOMEM;
- }
- if (src_window->type == SCIF_WINDOW_SELF)
- scif_unaligned_cpy_toio(dst_virt, src_virt, loop_len,
- remaining_len == loop_len ?
- work->ordered : false);
- else
- scif_unaligned_cpy_fromio(dst_virt, src_virt, loop_len,
- remaining_len == loop_len ?
- work->ordered : false);
- if (src_window->type != SCIF_WINDOW_SELF)
- iounmap_remote(src_virt, loop_len, work);
- if (dst_window->type != SCIF_WINDOW_SELF)
- iounmap_remote(dst_virt, loop_len, work);
- src_offset += loop_len;
- dst_offset += loop_len;
- remaining_len -= loop_len;
- }
-
- end_src_offset = src_window->offset +
- (src_window->nr_pages << PAGE_SHIFT);
- end_dst_offset = dst_window->offset +
- (dst_window->nr_pages << PAGE_SHIFT);
- tail_len = remaining_len & (L1_CACHE_BYTES - 1);
- remaining_len -= tail_len;
- while (remaining_len) {
- if (src_offset == end_src_offset) {
- src_window = list_next_entry(src_window, list);
- end_src_offset = src_window->offset +
- (src_window->nr_pages << PAGE_SHIFT);
- scif_init_window_iter(src_window, &src_win_iter);
- }
- if (dst_offset == end_dst_offset) {
- dst_window = list_next_entry(dst_window, list);
- end_dst_offset = dst_window->offset +
- (dst_window->nr_pages << PAGE_SHIFT);
- scif_init_window_iter(dst_window, &dst_win_iter);
- }
-
- /* compute dma addresses for transfer */
- src_dma_addr = scif_off_to_dma_addr(src_window, src_offset,
- &src_contig_bytes,
- &src_win_iter);
- dst_dma_addr = scif_off_to_dma_addr(dst_window, dst_offset,
- &dst_contig_bytes,
- &dst_win_iter);
- loop_len = min(src_contig_bytes, dst_contig_bytes);
- loop_len = min(loop_len, remaining_len);
- if (work->ordered && !tail_len &&
- !(remaining_len - loop_len)) {
- /*
- * Break up the last chunk of the transfer into two
- * steps. if there is no tail to gurantee DMA ordering.
- * Passing SCIF_DMA_POLLING inserts a status update
- * descriptor in step 1 which acts as a double sided
- * synchronization fence for the DMA engine to ensure
- * that the last cache line in step 2 is updated last.
- */
- /* Step 1) DMA: Body Length - L1_CACHE_BYTES. */
- tx = dev->device_prep_dma_memcpy(chan, dst_dma_addr,
- src_dma_addr,
- loop_len -
- L1_CACHE_BYTES,
- DMA_PREP_FENCE);
- if (!tx) {
- ret = -ENOMEM;
- goto err;
- }
- cookie = tx->tx_submit(tx);
- if (dma_submit_error(cookie)) {
- ret = -ENOMEM;
- goto err;
- }
- dma_async_issue_pending(chan);
- src_offset += (loop_len - L1_CACHE_BYTES);
- dst_offset += (loop_len - L1_CACHE_BYTES);
- src_dma_addr += (loop_len - L1_CACHE_BYTES);
- dst_dma_addr += (loop_len - L1_CACHE_BYTES);
- remaining_len -= (loop_len - L1_CACHE_BYTES);
- loop_len = remaining_len;
-
- /* Step 2) DMA: L1_CACHE_BYTES */
- tx = dev->device_prep_dma_memcpy(chan, dst_dma_addr,
- src_dma_addr,
- loop_len, 0);
- if (!tx) {
- ret = -ENOMEM;
- goto err;
- }
- cookie = tx->tx_submit(tx);
- if (dma_submit_error(cookie)) {
- ret = -ENOMEM;
- goto err;
- }
- dma_async_issue_pending(chan);
- } else {
- tx = dev->device_prep_dma_memcpy(chan, dst_dma_addr,
- src_dma_addr,
- loop_len, 0);
- if (!tx) {
- ret = -ENOMEM;
- goto err;
- }
- cookie = tx->tx_submit(tx);
- if (dma_submit_error(cookie)) {
- ret = -ENOMEM;
- goto err;
- }
- dma_async_issue_pending(chan);
- }
- src_offset += loop_len;
- dst_offset += loop_len;
- remaining_len -= loop_len;
- }
- remaining_len = tail_len;
- if (remaining_len) {
- loop_len = remaining_len;
- if (src_offset == end_src_offset)
- src_window = list_next_entry(src_window, list);
- if (dst_offset == end_dst_offset)
- dst_window = list_next_entry(dst_window, list);
-
- src_dma_addr = __scif_off_to_dma_addr(src_window, src_offset);
- dst_dma_addr = __scif_off_to_dma_addr(dst_window, dst_offset);
- /*
- * The CPU copy for the tail bytes must be initiated only once
- * previous DMA transfers for this endpoint have completed to
- * guarantee ordering.
- */
- if (work->ordered) {
- struct scif_dev *rdev = work->remote_dev;
-
- ret = scif_drain_dma_poll(rdev->sdev, chan);
- if (ret)
- return ret;
- }
- if (src_window->type == SCIF_WINDOW_SELF)
- src_virt = _get_local_va(src_offset, src_window,
- loop_len);
- else
- src_virt = ioremap_remote(src_offset, src_window,
- loop_len,
- work->remote_dev, NULL);
- if (!src_virt)
- return -ENOMEM;
-
- if (dst_window->type == SCIF_WINDOW_SELF)
- dst_virt = _get_local_va(dst_offset, dst_window,
- loop_len);
- else
- dst_virt = ioremap_remote(dst_offset, dst_window,
- loop_len,
- work->remote_dev, NULL);
- if (!dst_virt) {
- if (src_window->type != SCIF_WINDOW_SELF)
- iounmap_remote(src_virt, loop_len, work);
- return -ENOMEM;
- }
-
- if (src_window->type == SCIF_WINDOW_SELF)
- scif_unaligned_cpy_toio(dst_virt, src_virt, loop_len,
- work->ordered);
- else
- scif_unaligned_cpy_fromio(dst_virt, src_virt,
- loop_len, work->ordered);
- if (src_window->type != SCIF_WINDOW_SELF)
- iounmap_remote(src_virt, loop_len, work);
-
- if (dst_window->type != SCIF_WINDOW_SELF)
- iounmap_remote(dst_virt, loop_len, work);
- remaining_len -= loop_len;
- }
- return ret;
-err:
- dev_err(scif_info.mdev.this_device,
- "%s %d Desc Prog Failed ret %d\n",
- __func__, __LINE__, ret);
- return ret;
-}
-
-/*
- * scif_rma_list_cpu_copy:
- *
- * Traverse all the windows and perform CPU copy.
- */
-static int scif_rma_list_cpu_copy(struct scif_copy_work *work)
-{
- void *src_virt, *dst_virt;
- size_t loop_len, remaining_len;
- int src_page_off, dst_page_off;
- s64 src_offset = work->src_offset, dst_offset = work->dst_offset;
- struct scif_window *src_window = work->src_window;
- struct scif_window *dst_window = work->dst_window;
- s64 end_src_offset, end_dst_offset;
- int ret = 0;
- struct scif_window_iter src_win_iter;
- struct scif_window_iter dst_win_iter;
-
- remaining_len = work->len;
-
- scif_init_window_iter(src_window, &src_win_iter);
- scif_init_window_iter(dst_window, &dst_win_iter);
- while (remaining_len) {
- src_page_off = src_offset & ~PAGE_MASK;
- dst_page_off = dst_offset & ~PAGE_MASK;
- loop_len = min(PAGE_SIZE -
- max(src_page_off, dst_page_off),
- remaining_len);
-
- if (src_window->type == SCIF_WINDOW_SELF)
- src_virt = _get_local_va(src_offset, src_window,
- loop_len);
- else
- src_virt = ioremap_remote(src_offset, src_window,
- loop_len,
- work->remote_dev,
- &src_win_iter);
- if (!src_virt) {
- ret = -ENOMEM;
- goto error;
- }
-
- if (dst_window->type == SCIF_WINDOW_SELF)
- dst_virt = _get_local_va(dst_offset, dst_window,
- loop_len);
- else
- dst_virt = ioremap_remote(dst_offset, dst_window,
- loop_len,
- work->remote_dev,
- &dst_win_iter);
- if (!dst_virt) {
- if (src_window->type == SCIF_WINDOW_PEER)
- iounmap_remote(src_virt, loop_len, work);
- ret = -ENOMEM;
- goto error;
- }
-
- if (work->loopback) {
- memcpy(dst_virt, src_virt, loop_len);
- } else {
- if (src_window->type == SCIF_WINDOW_SELF)
- memcpy_toio((void __iomem __force *)dst_virt,
- src_virt, loop_len);
- else
- memcpy_fromio(dst_virt,
- (void __iomem __force *)src_virt,
- loop_len);
- }
- if (src_window->type == SCIF_WINDOW_PEER)
- iounmap_remote(src_virt, loop_len, work);
-
- if (dst_window->type == SCIF_WINDOW_PEER)
- iounmap_remote(dst_virt, loop_len, work);
-
- src_offset += loop_len;
- dst_offset += loop_len;
- remaining_len -= loop_len;
- if (remaining_len) {
- end_src_offset = src_window->offset +
- (src_window->nr_pages << PAGE_SHIFT);
- end_dst_offset = dst_window->offset +
- (dst_window->nr_pages << PAGE_SHIFT);
- if (src_offset == end_src_offset) {
- src_window = list_next_entry(src_window, list);
- scif_init_window_iter(src_window,
- &src_win_iter);
- }
- if (dst_offset == end_dst_offset) {
- dst_window = list_next_entry(dst_window, list);
- scif_init_window_iter(dst_window,
- &dst_win_iter);
- }
- }
- }
-error:
- return ret;
-}
-
-static int scif_rma_list_dma_copy_wrapper(struct scif_endpt *epd,
- struct scif_copy_work *work,
- struct dma_chan *chan, off_t loffset)
-{
- int src_cache_off, dst_cache_off;
- s64 src_offset = work->src_offset, dst_offset = work->dst_offset;
- u8 *temp = NULL;
- bool src_local = true;
- struct scif_dma_comp_cb *comp_cb;
- int err;
-
- if (is_dma_copy_aligned(chan->device, 1, 1, 1))
- return _scif_rma_list_dma_copy_aligned(work, chan);
-
- src_cache_off = src_offset & (L1_CACHE_BYTES - 1);
- dst_cache_off = dst_offset & (L1_CACHE_BYTES - 1);
-
- if (dst_cache_off == src_cache_off)
- return scif_rma_list_dma_copy_aligned(work, chan);
-
- if (work->loopback)
- return scif_rma_list_cpu_copy(work);
- src_local = work->src_window->type == SCIF_WINDOW_SELF;
-
- /* Allocate dma_completion cb */
- comp_cb = kzalloc(sizeof(*comp_cb), GFP_KERNEL);
- if (!comp_cb)
- goto error;
-
- work->comp_cb = comp_cb;
- comp_cb->cb_cookie = comp_cb;
- comp_cb->dma_completion_func = &scif_rma_completion_cb;
-
- if (work->len + (L1_CACHE_BYTES << 1) < SCIF_KMEM_UNALIGNED_BUF_SIZE) {
- comp_cb->is_cache = false;
- /* Allocate padding bytes to align to a cache line */
- temp = kmalloc(work->len + (L1_CACHE_BYTES << 1),
- GFP_KERNEL);
- if (!temp)
- goto free_comp_cb;
- comp_cb->temp_buf_to_free = temp;
- /* kmalloc(..) does not guarantee cache line alignment */
- if (!IS_ALIGNED((u64)temp, L1_CACHE_BYTES))
- temp = PTR_ALIGN(temp, L1_CACHE_BYTES);
- } else {
- comp_cb->is_cache = true;
- temp = kmem_cache_alloc(unaligned_cache, GFP_KERNEL);
- if (!temp)
- goto free_comp_cb;
- comp_cb->temp_buf_to_free = temp;
- }
-
- if (src_local) {
- temp += dst_cache_off;
- scif_rma_local_cpu_copy(work->src_offset, work->src_window,
- temp, work->len, true);
- } else {
- comp_cb->dst_window = work->dst_window;
- comp_cb->dst_offset = work->dst_offset;
- work->src_offset = work->src_offset - src_cache_off;
- comp_cb->len = work->len;
- work->len = ALIGN(work->len + src_cache_off, L1_CACHE_BYTES);
- comp_cb->header_padding = src_cache_off;
- }
- comp_cb->temp_buf = temp;
-
- err = scif_map_single(&comp_cb->temp_phys, temp,
- work->remote_dev, SCIF_KMEM_UNALIGNED_BUF_SIZE);
- if (err)
- goto free_temp_buf;
- comp_cb->sdev = work->remote_dev;
- if (scif_rma_list_dma_copy_unaligned(work, temp, chan, src_local) < 0)
- goto free_temp_buf;
- if (!src_local)
- work->fence_type = SCIF_DMA_INTR;
- return 0;
-free_temp_buf:
- if (comp_cb->is_cache)
- kmem_cache_free(unaligned_cache, comp_cb->temp_buf_to_free);
- else
- kfree(comp_cb->temp_buf_to_free);
-free_comp_cb:
- kfree(comp_cb);
-error:
- return -ENOMEM;
-}
-
-/**
- * scif_rma_copy:
- * @epd: end point descriptor.
- * @loffset: offset in local registered address space to/from which to copy
- * @addr: user virtual address to/from which to copy
- * @len: length of range to copy
- * @roffset: offset in remote registered address space to/from which to copy
- * @flags: flags
- * @dir: LOCAL->REMOTE or vice versa.
- * @last_chunk: true if this is the last chunk of a larger transfer
- *
- * Validate parameters, check if src/dst registered ranges requested for copy
- * are valid and initiate either CPU or DMA copy.
- */
-static int scif_rma_copy(scif_epd_t epd, off_t loffset, unsigned long addr,
- size_t len, off_t roffset, int flags,
- enum scif_rma_dir dir, bool last_chunk)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- struct scif_rma_req remote_req;
- struct scif_rma_req req;
- struct scif_window *local_window = NULL;
- struct scif_window *remote_window = NULL;
- struct scif_copy_work copy_work;
- bool loopback;
- int err = 0;
- struct dma_chan *chan;
- struct scif_mmu_notif *mmn = NULL;
- bool cache = false;
- struct device *spdev;
-
- err = scif_verify_epd(ep);
- if (err)
- return err;
-
- if (flags && !(flags & (SCIF_RMA_USECPU | SCIF_RMA_USECACHE |
- SCIF_RMA_SYNC | SCIF_RMA_ORDERED)))
- return -EINVAL;
-
- loopback = scifdev_self(ep->remote_dev) ? true : false;
- copy_work.fence_type = ((flags & SCIF_RMA_SYNC) && last_chunk) ?
- SCIF_DMA_POLL : 0;
- copy_work.ordered = !!((flags & SCIF_RMA_ORDERED) && last_chunk);
-
- /* Use CPU for Mgmt node <-> Mgmt node copies */
- if (loopback && scif_is_mgmt_node()) {
- flags |= SCIF_RMA_USECPU;
- copy_work.fence_type = 0x0;
- }
-
- cache = scif_is_set_reg_cache(flags);
-
- remote_req.out_window = &remote_window;
- remote_req.offset = roffset;
- remote_req.nr_bytes = len;
- /*
- * If transfer is from local to remote then the remote window
- * must be writeable and vice versa.
- */
- remote_req.prot = dir == SCIF_LOCAL_TO_REMOTE ? VM_WRITE : VM_READ;
- remote_req.type = SCIF_WINDOW_PARTIAL;
- remote_req.head = &ep->rma_info.remote_reg_list;
-
- spdev = scif_get_peer_dev(ep->remote_dev);
- if (IS_ERR(spdev)) {
- err = PTR_ERR(spdev);
- return err;
- }
-
- if (addr && cache) {
- mutex_lock(&ep->rma_info.mmn_lock);
- mmn = scif_find_mmu_notifier(current->mm, &ep->rma_info);
- if (!mmn)
- mmn = scif_add_mmu_notifier(current->mm, ep);
- mutex_unlock(&ep->rma_info.mmn_lock);
- if (IS_ERR(mmn)) {
- scif_put_peer_dev(spdev);
- return PTR_ERR(mmn);
- }
- cache = cache && !scif_rma_tc_can_cache(ep, len);
- }
- mutex_lock(&ep->rma_info.rma_lock);
- if (addr) {
- req.out_window = &local_window;
- req.nr_bytes = ALIGN(len + (addr & ~PAGE_MASK),
- PAGE_SIZE);
- req.va_for_temp = addr & PAGE_MASK;
- req.prot = (dir == SCIF_LOCAL_TO_REMOTE ?
- VM_READ : VM_WRITE | VM_READ);
- /* Does a valid local window exist? */
- if (mmn) {
- spin_lock(&ep->rma_info.tc_lock);
- req.head = &mmn->tc_reg_list;
- err = scif_query_tcw(ep, &req);
- spin_unlock(&ep->rma_info.tc_lock);
- }
- if (!mmn || err) {
- err = scif_register_temp(epd, req.va_for_temp,
- req.nr_bytes, req.prot,
- &loffset, &local_window);
- if (err) {
- mutex_unlock(&ep->rma_info.rma_lock);
- goto error;
- }
- if (!cache)
- goto skip_cache;
- atomic_inc(&ep->rma_info.tcw_refcount);
- atomic_add_return(local_window->nr_pages,
- &ep->rma_info.tcw_total_pages);
- if (mmn) {
- spin_lock(&ep->rma_info.tc_lock);
- scif_insert_tcw(local_window,
- &mmn->tc_reg_list);
- spin_unlock(&ep->rma_info.tc_lock);
- }
- }
-skip_cache:
- loffset = local_window->offset +
- (addr - local_window->va_for_temp);
- } else {
- req.out_window = &local_window;
- req.offset = loffset;
- /*
- * If transfer is from local to remote then the self window
- * must be readable and vice versa.
- */
- req.prot = dir == SCIF_LOCAL_TO_REMOTE ? VM_READ : VM_WRITE;
- req.nr_bytes = len;
- req.type = SCIF_WINDOW_PARTIAL;
- req.head = &ep->rma_info.reg_list;
- /* Does a valid local window exist? */
- err = scif_query_window(&req);
- if (err) {
- mutex_unlock(&ep->rma_info.rma_lock);
- goto error;
- }
- }
-
- /* Does a valid remote window exist? */
- err = scif_query_window(&remote_req);
- if (err) {
- mutex_unlock(&ep->rma_info.rma_lock);
- goto error;
- }
-
- /*
- * Prepare copy_work for submitting work to the DMA kernel thread
- * or CPU copy routine.
- */
- copy_work.len = len;
- copy_work.loopback = loopback;
- copy_work.remote_dev = ep->remote_dev;
- if (dir == SCIF_LOCAL_TO_REMOTE) {
- copy_work.src_offset = loffset;
- copy_work.src_window = local_window;
- copy_work.dst_offset = roffset;
- copy_work.dst_window = remote_window;
- } else {
- copy_work.src_offset = roffset;
- copy_work.src_window = remote_window;
- copy_work.dst_offset = loffset;
- copy_work.dst_window = local_window;
- }
-
- if (flags & SCIF_RMA_USECPU) {
- scif_rma_list_cpu_copy(©_work);
- } else {
- chan = ep->rma_info.dma_chan;
- err = scif_rma_list_dma_copy_wrapper(epd, ©_work,
- chan, loffset);
- }
- if (addr && !cache)
- atomic_inc(&ep->rma_info.tw_refcount);
-
- mutex_unlock(&ep->rma_info.rma_lock);
-
- if (last_chunk) {
- struct scif_dev *rdev = ep->remote_dev;
-
- if (copy_work.fence_type == SCIF_DMA_POLL)
- err = scif_drain_dma_poll(rdev->sdev,
- ep->rma_info.dma_chan);
- else if (copy_work.fence_type == SCIF_DMA_INTR)
- err = scif_drain_dma_intr(rdev->sdev,
- ep->rma_info.dma_chan);
- }
-
- if (addr && !cache)
- scif_queue_for_cleanup(local_window, &scif_info.rma);
- scif_put_peer_dev(spdev);
- return err;
-error:
- if (err) {
- if (addr && local_window && !cache)
- scif_destroy_window(ep, local_window);
- dev_err(scif_info.mdev.this_device,
- "%s %d err %d len 0x%lx\n",
- __func__, __LINE__, err, len);
- }
- scif_put_peer_dev(spdev);
- return err;
-}
-
-int scif_readfrom(scif_epd_t epd, off_t loffset, size_t len,
- off_t roffset, int flags)
-{
- int err;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI readfrom: ep %p loffset 0x%lx len 0x%lx offset 0x%lx flags 0x%x\n",
- epd, loffset, len, roffset, flags);
- if (scif_unaligned(loffset, roffset)) {
- while (len > SCIF_MAX_UNALIGNED_BUF_SIZE) {
- err = scif_rma_copy(epd, loffset, 0x0,
- SCIF_MAX_UNALIGNED_BUF_SIZE,
- roffset, flags,
- SCIF_REMOTE_TO_LOCAL, false);
- if (err)
- goto readfrom_err;
- loffset += SCIF_MAX_UNALIGNED_BUF_SIZE;
- roffset += SCIF_MAX_UNALIGNED_BUF_SIZE;
- len -= SCIF_MAX_UNALIGNED_BUF_SIZE;
- }
- }
- err = scif_rma_copy(epd, loffset, 0x0, len,
- roffset, flags, SCIF_REMOTE_TO_LOCAL, true);
-readfrom_err:
- return err;
-}
-EXPORT_SYMBOL_GPL(scif_readfrom);
-
-int scif_writeto(scif_epd_t epd, off_t loffset, size_t len,
- off_t roffset, int flags)
-{
- int err;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI writeto: ep %p loffset 0x%lx len 0x%lx roffset 0x%lx flags 0x%x\n",
- epd, loffset, len, roffset, flags);
- if (scif_unaligned(loffset, roffset)) {
- while (len > SCIF_MAX_UNALIGNED_BUF_SIZE) {
- err = scif_rma_copy(epd, loffset, 0x0,
- SCIF_MAX_UNALIGNED_BUF_SIZE,
- roffset, flags,
- SCIF_LOCAL_TO_REMOTE, false);
- if (err)
- goto writeto_err;
- loffset += SCIF_MAX_UNALIGNED_BUF_SIZE;
- roffset += SCIF_MAX_UNALIGNED_BUF_SIZE;
- len -= SCIF_MAX_UNALIGNED_BUF_SIZE;
- }
- }
- err = scif_rma_copy(epd, loffset, 0x0, len,
- roffset, flags, SCIF_LOCAL_TO_REMOTE, true);
-writeto_err:
- return err;
-}
-EXPORT_SYMBOL_GPL(scif_writeto);
-
-int scif_vreadfrom(scif_epd_t epd, void *addr, size_t len,
- off_t roffset, int flags)
-{
- int err;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI vreadfrom: ep %p addr %p len 0x%lx roffset 0x%lx flags 0x%x\n",
- epd, addr, len, roffset, flags);
- if (scif_unaligned((off_t __force)addr, roffset)) {
- if (len > SCIF_MAX_UNALIGNED_BUF_SIZE)
- flags &= ~SCIF_RMA_USECACHE;
-
- while (len > SCIF_MAX_UNALIGNED_BUF_SIZE) {
- err = scif_rma_copy(epd, 0, (u64)addr,
- SCIF_MAX_UNALIGNED_BUF_SIZE,
- roffset, flags,
- SCIF_REMOTE_TO_LOCAL, false);
- if (err)
- goto vreadfrom_err;
- addr += SCIF_MAX_UNALIGNED_BUF_SIZE;
- roffset += SCIF_MAX_UNALIGNED_BUF_SIZE;
- len -= SCIF_MAX_UNALIGNED_BUF_SIZE;
- }
- }
- err = scif_rma_copy(epd, 0, (u64)addr, len,
- roffset, flags, SCIF_REMOTE_TO_LOCAL, true);
-vreadfrom_err:
- return err;
-}
-EXPORT_SYMBOL_GPL(scif_vreadfrom);
-
-int scif_vwriteto(scif_epd_t epd, void *addr, size_t len,
- off_t roffset, int flags)
-{
- int err;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI vwriteto: ep %p addr %p len 0x%lx roffset 0x%lx flags 0x%x\n",
- epd, addr, len, roffset, flags);
- if (scif_unaligned((off_t __force)addr, roffset)) {
- if (len > SCIF_MAX_UNALIGNED_BUF_SIZE)
- flags &= ~SCIF_RMA_USECACHE;
-
- while (len > SCIF_MAX_UNALIGNED_BUF_SIZE) {
- err = scif_rma_copy(epd, 0, (u64)addr,
- SCIF_MAX_UNALIGNED_BUF_SIZE,
- roffset, flags,
- SCIF_LOCAL_TO_REMOTE, false);
- if (err)
- goto vwriteto_err;
- addr += SCIF_MAX_UNALIGNED_BUF_SIZE;
- roffset += SCIF_MAX_UNALIGNED_BUF_SIZE;
- len -= SCIF_MAX_UNALIGNED_BUF_SIZE;
- }
- }
- err = scif_rma_copy(epd, 0, (u64)addr, len,
- roffset, flags, SCIF_LOCAL_TO_REMOTE, true);
-vwriteto_err:
- return err;
-}
-EXPORT_SYMBOL_GPL(scif_vwriteto);
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#include "scif_main.h"
-#include "scif_map.h"
-
-void scif_cleanup_ep_qp(struct scif_endpt *ep)
-{
- struct scif_qp *qp = ep->qp_info.qp;
-
- if (qp->outbound_q.rb_base) {
- scif_iounmap((void *)qp->outbound_q.rb_base,
- qp->outbound_q.size, ep->remote_dev);
- qp->outbound_q.rb_base = NULL;
- }
- if (qp->remote_qp) {
- scif_iounmap((void *)qp->remote_qp,
- sizeof(struct scif_qp), ep->remote_dev);
- qp->remote_qp = NULL;
- }
- if (qp->local_qp) {
- scif_unmap_single(qp->local_qp, ep->remote_dev,
- sizeof(struct scif_qp));
- qp->local_qp = 0x0;
- }
- if (qp->local_buf) {
- scif_unmap_single(qp->local_buf, ep->remote_dev,
- SCIF_ENDPT_QP_SIZE);
- qp->local_buf = 0;
- }
-}
-
-void scif_teardown_ep(void *endpt)
-{
- struct scif_endpt *ep = endpt;
- struct scif_qp *qp = ep->qp_info.qp;
-
- if (qp) {
- spin_lock(&ep->lock);
- scif_cleanup_ep_qp(ep);
- spin_unlock(&ep->lock);
- kfree(qp->inbound_q.rb_base);
- kfree(qp);
- }
-}
-
-/*
- * Enqueue the endpoint to the zombie list for cleanup.
- * The endpoint should not be accessed once this API returns.
- */
-void scif_add_epd_to_zombie_list(struct scif_endpt *ep, bool eplock_held)
-{
- if (!eplock_held)
- mutex_lock(&scif_info.eplock);
- spin_lock(&ep->lock);
- ep->state = SCIFEP_ZOMBIE;
- spin_unlock(&ep->lock);
- list_add_tail(&ep->list, &scif_info.zombie);
- scif_info.nr_zombies++;
- if (!eplock_held)
- mutex_unlock(&scif_info.eplock);
- schedule_work(&scif_info.misc_work);
-}
-
-static struct scif_endpt *scif_find_listen_ep(u16 port)
-{
- struct scif_endpt *ep = NULL;
- struct list_head *pos, *tmpq;
-
- mutex_lock(&scif_info.eplock);
- list_for_each_safe(pos, tmpq, &scif_info.listen) {
- ep = list_entry(pos, struct scif_endpt, list);
- if (ep->port.port == port) {
- mutex_unlock(&scif_info.eplock);
- return ep;
- }
- }
- mutex_unlock(&scif_info.eplock);
- return NULL;
-}
-
-void scif_cleanup_zombie_epd(void)
-{
- struct list_head *pos, *tmpq;
- struct scif_endpt *ep;
-
- mutex_lock(&scif_info.eplock);
- list_for_each_safe(pos, tmpq, &scif_info.zombie) {
- ep = list_entry(pos, struct scif_endpt, list);
- if (scif_rma_ep_can_uninit(ep)) {
- list_del(pos);
- scif_info.nr_zombies--;
- put_iova_domain(&ep->rma_info.iovad);
- kfree(ep);
- }
- }
- mutex_unlock(&scif_info.eplock);
-}
-
-/**
- * scif_cnctreq() - Respond to SCIF_CNCT_REQ interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * This message is initiated by the remote node to request a connection
- * to the local node. This function looks for an end point in the
- * listen state on the requested port id.
- *
- * If it finds a listening port it places the connect request on the
- * listening end points queue and wakes up any pending accept calls.
- *
- * If it does not find a listening end point it sends a connection
- * reject message to the remote node.
- */
-void scif_cnctreq(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_endpt *ep = NULL;
- struct scif_conreq *conreq;
-
- conreq = kmalloc(sizeof(*conreq), GFP_KERNEL);
- if (!conreq)
- /* Lack of resources so reject the request. */
- goto conreq_sendrej;
-
- ep = scif_find_listen_ep(msg->dst.port);
- if (!ep)
- /* Send reject due to no listening ports */
- goto conreq_sendrej_free;
- else
- spin_lock(&ep->lock);
-
- if (ep->backlog <= ep->conreqcnt) {
- /* Send reject due to too many pending requests */
- spin_unlock(&ep->lock);
- goto conreq_sendrej_free;
- }
-
- conreq->msg = *msg;
- list_add_tail(&conreq->list, &ep->conlist);
- ep->conreqcnt++;
- wake_up_interruptible(&ep->conwq);
- spin_unlock(&ep->lock);
- return;
-
-conreq_sendrej_free:
- kfree(conreq);
-conreq_sendrej:
- msg->uop = SCIF_CNCT_REJ;
- scif_nodeqp_send(&scif_dev[msg->src.node], msg);
-}
-
-/**
- * scif_cnctgnt() - Respond to SCIF_CNCT_GNT interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * An accept() on the remote node has occurred and sent this message
- * to indicate success. Place the end point in the MAPPING state and
- * save the remote nodes memory information. Then wake up the connect
- * request so it can finish.
- */
-void scif_cnctgnt(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_endpt *ep = (struct scif_endpt *)msg->payload[0];
-
- spin_lock(&ep->lock);
- if (SCIFEP_CONNECTING == ep->state) {
- ep->peer.node = msg->src.node;
- ep->peer.port = msg->src.port;
- ep->qp_info.gnt_pld = msg->payload[1];
- ep->remote_ep = msg->payload[2];
- ep->state = SCIFEP_MAPPING;
-
- wake_up(&ep->conwq);
- }
- spin_unlock(&ep->lock);
-}
-
-/**
- * scif_cnctgnt_ack() - Respond to SCIF_CNCT_GNTACK interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * The remote connection request has finished mapping the local memory.
- * Place the connection in the connected state and wake up the pending
- * accept() call.
- */
-void scif_cnctgnt_ack(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_endpt *ep = (struct scif_endpt *)msg->payload[0];
-
- mutex_lock(&scif_info.connlock);
- spin_lock(&ep->lock);
- /* New ep is now connected with all resources set. */
- ep->state = SCIFEP_CONNECTED;
- list_add_tail(&ep->list, &scif_info.connected);
- wake_up(&ep->conwq);
- spin_unlock(&ep->lock);
- mutex_unlock(&scif_info.connlock);
-}
-
-/**
- * scif_cnctgnt_nack() - Respond to SCIF_CNCT_GNTNACK interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * The remote connection request failed to map the local memory it was sent.
- * Place the end point in the CLOSING state to indicate it and wake up
- * the pending accept();
- */
-void scif_cnctgnt_nack(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_endpt *ep = (struct scif_endpt *)msg->payload[0];
-
- spin_lock(&ep->lock);
- ep->state = SCIFEP_CLOSING;
- wake_up(&ep->conwq);
- spin_unlock(&ep->lock);
-}
-
-/**
- * scif_cnctrej() - Respond to SCIF_CNCT_REJ interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * The remote end has rejected the connection request. Set the end
- * point back to the bound state and wake up the pending connect().
- */
-void scif_cnctrej(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_endpt *ep = (struct scif_endpt *)msg->payload[0];
-
- spin_lock(&ep->lock);
- if (SCIFEP_CONNECTING == ep->state) {
- ep->state = SCIFEP_BOUND;
- wake_up(&ep->conwq);
- }
- spin_unlock(&ep->lock);
-}
-
-/**
- * scif_discnct() - Respond to SCIF_DISCNCT interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * The remote node has indicated close() has been called on its end
- * point. Remove the local end point from the connected list, set its
- * state to disconnected and ensure accesses to the remote node are
- * shutdown.
- *
- * When all accesses to the remote end have completed then send a
- * DISCNT_ACK to indicate it can remove its resources and complete
- * the close routine.
- */
-void scif_discnct(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_endpt *ep = NULL;
- struct scif_endpt *tmpep;
- struct list_head *pos, *tmpq;
-
- mutex_lock(&scif_info.connlock);
- list_for_each_safe(pos, tmpq, &scif_info.connected) {
- tmpep = list_entry(pos, struct scif_endpt, list);
- /*
- * The local ep may have sent a disconnect and and been closed
- * due to a message response time out. It may have been
- * allocated again and formed a new connection so we want to
- * check if the remote ep matches
- */
- if (((u64)tmpep == msg->payload[1]) &&
- ((u64)tmpep->remote_ep == msg->payload[0])) {
- list_del(pos);
- ep = tmpep;
- spin_lock(&ep->lock);
- break;
- }
- }
-
- /*
- * If the terminated end is not found then this side started closing
- * before the other side sent the disconnect. If so the ep will no
- * longer be on the connected list. Regardless the other side
- * needs to be acked to let it know close is complete.
- */
- if (!ep) {
- mutex_unlock(&scif_info.connlock);
- goto discnct_ack;
- }
-
- ep->state = SCIFEP_DISCONNECTED;
- list_add_tail(&ep->list, &scif_info.disconnected);
-
- wake_up_interruptible(&ep->sendwq);
- wake_up_interruptible(&ep->recvwq);
- spin_unlock(&ep->lock);
- mutex_unlock(&scif_info.connlock);
-
-discnct_ack:
- msg->uop = SCIF_DISCNT_ACK;
- scif_nodeqp_send(&scif_dev[msg->src.node], msg);
-}
-
-/**
- * scif_discnct_ack() - Respond to SCIF_DISCNT_ACK interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * Remote side has indicated it has not more references to local resources
- */
-void scif_discnt_ack(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_endpt *ep = (struct scif_endpt *)msg->payload[0];
-
- spin_lock(&ep->lock);
- ep->state = SCIFEP_DISCONNECTED;
- spin_unlock(&ep->lock);
- complete(&ep->discon);
-}
-
-/**
- * scif_clientsend() - Respond to SCIF_CLIENT_SEND interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * Remote side is confirming send or receive interrupt handling is complete.
- */
-void scif_clientsend(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_endpt *ep = (struct scif_endpt *)msg->payload[0];
-
- spin_lock(&ep->lock);
- if (SCIFEP_CONNECTED == ep->state)
- wake_up_interruptible(&ep->recvwq);
- spin_unlock(&ep->lock);
-}
-
-/**
- * scif_clientrcvd() - Respond to SCIF_CLIENT_RCVD interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * Remote side is confirming send or receive interrupt handling is complete.
- */
-void scif_clientrcvd(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_endpt *ep = (struct scif_endpt *)msg->payload[0];
-
- spin_lock(&ep->lock);
- if (SCIFEP_CONNECTED == ep->state)
- wake_up_interruptible(&ep->sendwq);
- spin_unlock(&ep->lock);
-}
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#ifndef SCIF_EPD_H
-#define SCIF_EPD_H
-
-#include <linux/delay.h>
-#include <linux/scif.h>
-#include <linux/scif_ioctl.h>
-
-#define SCIF_EPLOCK_HELD true
-
-enum scif_epd_state {
- SCIFEP_UNBOUND,
- SCIFEP_BOUND,
- SCIFEP_LISTENING,
- SCIFEP_CONNECTED,
- SCIFEP_CONNECTING,
- SCIFEP_MAPPING,
- SCIFEP_CLOSING,
- SCIFEP_CLLISTEN,
- SCIFEP_DISCONNECTED,
- SCIFEP_ZOMBIE
-};
-
-/*
- * struct scif_conreq - Data structure added to the connection list.
- *
- * @msg: connection request message received
- * @list: link to list of connection requests
- */
-struct scif_conreq {
- struct scifmsg msg;
- struct list_head list;
-};
-
-/* Size of the RB for the Endpoint QP */
-#define SCIF_ENDPT_QP_SIZE 0x1000
-
-/*
- * scif_endpt_qp_info - SCIF endpoint queue pair
- *
- * @qp - Qpair for this endpoint
- * @qp_offset - DMA address of the QP
- * @gnt_pld - Payload in a SCIF_CNCT_GNT message containing the
- * physical address of the remote_qp.
- */
-struct scif_endpt_qp_info {
- struct scif_qp *qp;
- dma_addr_t qp_offset;
- dma_addr_t gnt_pld;
-};
-
-/*
- * struct scif_endpt - The SCIF endpoint data structure
- *
- * @state: end point state
- * @lock: lock synchronizing access to endpoint fields like state etc
- * @port: self port information
- * @peer: peer port information
- * @backlog: maximum pending connection requests
- * @qp_info: Endpoint QP information for SCIF messaging
- * @remote_dev: scifdev used by this endpt to communicate with remote node.
- * @remote_ep: remote endpoint
- * @conreqcnt: Keep track of number of connection requests.
- * @files: Open file information used to match the id passed in with
- * the flush routine.
- * @conlist: list of connection requests
- * @conwq: waitqueue for connection processing
- * @discon: completion used during disconnection
- * @sendwq: waitqueue used during sending messages
- * @recvwq: waitqueue used during message receipt
- * @sendlock: Synchronize ordering of messages sent
- * @recvlock: Synchronize ordering of messages received
- * @list: link to list of various endpoints like connected, listening etc
- * @li_accept: pending ACCEPTREG
- * @acceptcnt: pending ACCEPTREG cnt
- * @liacceptlist: link to listen accept
- * @miacceptlist: link to uaccept
- * @listenep: associated listen ep
- * @conn_work: Non blocking connect work
- * @conn_port: Connection port
- * @conn_err: Errors during connection
- * @conn_async_state: Async connection
- * @conn_pend_wq: Used by poll while waiting for incoming connections
- * @conn_list: List of async connection requests
- * @rma_info: Information for triggering SCIF RMA and DMA operations
- * @mmu_list: link to list of MMU notifier cleanup work
- * @anon: anonymous file for use in kernel mode scif poll
- */
-struct scif_endpt {
- enum scif_epd_state state;
- spinlock_t lock;
- struct scif_port_id port;
- struct scif_port_id peer;
- int backlog;
- struct scif_endpt_qp_info qp_info;
- struct scif_dev *remote_dev;
- u64 remote_ep;
- int conreqcnt;
- struct files_struct *files;
- struct list_head conlist;
- wait_queue_head_t conwq;
- struct completion discon;
- wait_queue_head_t sendwq;
- wait_queue_head_t recvwq;
- struct mutex sendlock;
- struct mutex recvlock;
- struct list_head list;
- struct list_head li_accept;
- int acceptcnt;
- struct list_head liacceptlist;
- struct list_head miacceptlist;
- struct scif_endpt *listenep;
- struct scif_port_id conn_port;
- int conn_err;
- int conn_async_state;
- wait_queue_head_t conn_pend_wq;
- struct list_head conn_list;
- struct scif_endpt_rma_info rma_info;
- struct list_head mmu_list;
- struct file *anon;
-};
-
-static inline int scifdev_alive(struct scif_endpt *ep)
-{
- return _scifdev_alive(ep->remote_dev);
-}
-
-/*
- * scif_verify_epd:
- * ep: SCIF endpoint
- *
- * Checks several generic error conditions and returns the
- * appropriate error.
- */
-static inline int scif_verify_epd(struct scif_endpt *ep)
-{
- if (ep->state == SCIFEP_DISCONNECTED)
- return -ECONNRESET;
-
- if (ep->state != SCIFEP_CONNECTED)
- return -ENOTCONN;
-
- if (!scifdev_alive(ep))
- return -ENODEV;
-
- return 0;
-}
-
-static inline int scif_anon_inode_getfile(scif_epd_t epd)
-{
- epd->anon = anon_inode_getfile("scif", &scif_anon_fops, NULL, 0);
-
- return PTR_ERR_OR_ZERO(epd->anon);
-}
-
-static inline void scif_anon_inode_fput(scif_epd_t epd)
-{
- if (epd->anon) {
- fput(epd->anon);
- epd->anon = NULL;
- }
-}
-
-void scif_cleanup_zombie_epd(void);
-void scif_teardown_ep(void *endpt);
-void scif_cleanup_ep_qp(struct scif_endpt *ep);
-void scif_add_epd_to_zombie_list(struct scif_endpt *ep, bool eplock_held);
-void scif_get_node_info(void);
-void scif_send_acks(struct scif_dev *dev);
-void scif_conn_handler(struct work_struct *work);
-int scif_rsrv_port(u16 port);
-void scif_get_port(u16 port);
-int scif_get_new_port(void);
-void scif_put_port(u16 port);
-int scif_user_send(scif_epd_t epd, void __user *msg, int len, int flags);
-int scif_user_recv(scif_epd_t epd, void __user *msg, int len, int flags);
-void scif_cnctreq(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_cnctgnt(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_cnctgnt_ack(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_cnctgnt_nack(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_cnctrej(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_discnct(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_discnt_ack(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_clientsend(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_clientrcvd(struct scif_dev *scifdev, struct scifmsg *msg);
-int __scif_connect(scif_epd_t epd, struct scif_port_id *dst, bool non_block);
-int __scif_flush(scif_epd_t epd);
-int scif_mmap(struct vm_area_struct *vma, scif_epd_t epd);
-__poll_t __scif_pollfd(struct file *f, poll_table *wait,
- struct scif_endpt *ep);
-int __scif_pin_pages(void *addr, size_t len, int *out_prot,
- int map_flags, scif_pinned_pages_t *pages);
-#endif /* SCIF_EPD_H */
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#include "scif_main.h"
-
-static int scif_fdopen(struct inode *inode, struct file *f)
-{
- struct scif_endpt *priv = scif_open();
-
- if (!priv)
- return -ENOMEM;
- f->private_data = priv;
- return 0;
-}
-
-static int scif_fdclose(struct inode *inode, struct file *f)
-{
- struct scif_endpt *priv = f->private_data;
-
- return scif_close(priv);
-}
-
-static int scif_fdmmap(struct file *f, struct vm_area_struct *vma)
-{
- struct scif_endpt *priv = f->private_data;
-
- return scif_mmap(vma, priv);
-}
-
-static __poll_t scif_fdpoll(struct file *f, poll_table *wait)
-{
- struct scif_endpt *priv = f->private_data;
-
- return __scif_pollfd(f, wait, priv);
-}
-
-static int scif_fdflush(struct file *f, fl_owner_t id)
-{
- struct scif_endpt *ep = f->private_data;
-
- spin_lock(&ep->lock);
- /*
- * The listening endpoint stashes the open file information before
- * waiting for incoming connections. The release callback would never be
- * called if the application closed the endpoint, while waiting for
- * incoming connections from a separate thread since the file descriptor
- * reference count is bumped up in the accept IOCTL. Call the flush
- * routine if the id matches the endpoint open file information so that
- * the listening endpoint can be woken up and the fd released.
- */
- if (ep->files == id)
- __scif_flush(ep);
- spin_unlock(&ep->lock);
- return 0;
-}
-
-static __always_inline void scif_err_debug(int err, const char *str)
-{
- /*
- * ENOTCONN is a common uninteresting error which is
- * flooding debug messages to the console unnecessarily.
- */
- if (err < 0 && err != -ENOTCONN)
- dev_dbg(scif_info.mdev.this_device, "%s err %d\n", str, err);
-}
-
-static long scif_fdioctl(struct file *f, unsigned int cmd, unsigned long arg)
-{
- struct scif_endpt *priv = f->private_data;
- void __user *argp = (void __user *)arg;
- int err = 0;
- struct scifioctl_msg request;
- bool non_block = false;
-
- non_block = !!(f->f_flags & O_NONBLOCK);
-
- switch (cmd) {
- case SCIF_BIND:
- {
- int pn;
-
- if (copy_from_user(&pn, argp, sizeof(pn)))
- return -EFAULT;
-
- pn = scif_bind(priv, pn);
- if (pn < 0)
- return pn;
-
- if (copy_to_user(argp, &pn, sizeof(pn)))
- return -EFAULT;
-
- return 0;
- }
- case SCIF_LISTEN:
- return scif_listen(priv, arg);
- case SCIF_CONNECT:
- {
- struct scifioctl_connect req;
- struct scif_endpt *ep = (struct scif_endpt *)priv;
-
- if (copy_from_user(&req, argp, sizeof(req)))
- return -EFAULT;
-
- err = __scif_connect(priv, &req.peer, non_block);
- if (err < 0)
- return err;
-
- req.self.node = ep->port.node;
- req.self.port = ep->port.port;
-
- if (copy_to_user(argp, &req, sizeof(req)))
- return -EFAULT;
-
- return 0;
- }
- /*
- * Accept is done in two halves. The request ioctl does the basic
- * functionality of accepting the request and returning the information
- * about it including the internal ID of the end point. The register
- * is done with the internal ID on a new file descriptor opened by the
- * requesting process.
- */
- case SCIF_ACCEPTREQ:
- {
- struct scifioctl_accept request;
- scif_epd_t *ep = (scif_epd_t *)&request.endpt;
-
- if (copy_from_user(&request, argp, sizeof(request)))
- return -EFAULT;
-
- err = scif_accept(priv, &request.peer, ep, request.flags);
- if (err < 0)
- return err;
-
- if (copy_to_user(argp, &request, sizeof(request))) {
- scif_close(*ep);
- return -EFAULT;
- }
- /*
- * Add to the list of user mode eps where the second half
- * of the accept is not yet completed.
- */
- mutex_lock(&scif_info.eplock);
- list_add_tail(&((*ep)->miacceptlist), &scif_info.uaccept);
- list_add_tail(&((*ep)->liacceptlist), &priv->li_accept);
- (*ep)->listenep = priv;
- priv->acceptcnt++;
- mutex_unlock(&scif_info.eplock);
-
- return 0;
- }
- case SCIF_ACCEPTREG:
- {
- struct scif_endpt *priv = f->private_data;
- struct scif_endpt *newep;
- struct scif_endpt *lisep;
- struct scif_endpt *fep = NULL;
- struct scif_endpt *tmpep;
- struct list_head *pos, *tmpq;
-
- /* Finally replace the pointer to the accepted endpoint */
- if (copy_from_user(&newep, argp, sizeof(void *)))
- return -EFAULT;
-
- /* Remove form the user accept queue */
- mutex_lock(&scif_info.eplock);
- list_for_each_safe(pos, tmpq, &scif_info.uaccept) {
- tmpep = list_entry(pos,
- struct scif_endpt, miacceptlist);
- if (tmpep == newep) {
- list_del(pos);
- fep = tmpep;
- break;
- }
- }
-
- if (!fep) {
- mutex_unlock(&scif_info.eplock);
- return -ENOENT;
- }
-
- lisep = newep->listenep;
- list_for_each_safe(pos, tmpq, &lisep->li_accept) {
- tmpep = list_entry(pos,
- struct scif_endpt, liacceptlist);
- if (tmpep == newep) {
- list_del(pos);
- lisep->acceptcnt--;
- break;
- }
- }
-
- mutex_unlock(&scif_info.eplock);
-
- /* Free the resources automatically created from the open. */
- scif_anon_inode_fput(priv);
- scif_teardown_ep(priv);
- scif_add_epd_to_zombie_list(priv, !SCIF_EPLOCK_HELD);
- f->private_data = newep;
- return 0;
- }
- case SCIF_SEND:
- {
- struct scif_endpt *priv = f->private_data;
-
- if (copy_from_user(&request, argp,
- sizeof(struct scifioctl_msg))) {
- err = -EFAULT;
- goto send_err;
- }
- err = scif_user_send(priv, (void __user *)request.msg,
- request.len, request.flags);
- if (err < 0)
- goto send_err;
- if (copy_to_user(&
- ((struct scifioctl_msg __user *)argp)->out_len,
- &err, sizeof(err))) {
- err = -EFAULT;
- goto send_err;
- }
- err = 0;
-send_err:
- scif_err_debug(err, "scif_send");
- return err;
- }
- case SCIF_RECV:
- {
- struct scif_endpt *priv = f->private_data;
-
- if (copy_from_user(&request, argp,
- sizeof(struct scifioctl_msg))) {
- err = -EFAULT;
- goto recv_err;
- }
-
- err = scif_user_recv(priv, (void __user *)request.msg,
- request.len, request.flags);
- if (err < 0)
- goto recv_err;
-
- if (copy_to_user(&
- ((struct scifioctl_msg __user *)argp)->out_len,
- &err, sizeof(err))) {
- err = -EFAULT;
- goto recv_err;
- }
- err = 0;
-recv_err:
- scif_err_debug(err, "scif_recv");
- return err;
- }
- case SCIF_GET_NODEIDS:
- {
- struct scifioctl_node_ids node_ids;
- int entries;
- u16 *nodes;
- void __user *unodes, *uself;
- u16 self;
-
- if (copy_from_user(&node_ids, argp, sizeof(node_ids))) {
- err = -EFAULT;
- goto getnodes_err2;
- }
-
- entries = min_t(int, scif_info.maxid, node_ids.len);
- nodes = kmalloc_array(entries, sizeof(u16), GFP_KERNEL);
- if (entries && !nodes) {
- err = -ENOMEM;
- goto getnodes_err2;
- }
- node_ids.len = scif_get_node_ids(nodes, entries, &self);
-
- unodes = (void __user *)node_ids.nodes;
- if (copy_to_user(unodes, nodes, sizeof(u16) * entries)) {
- err = -EFAULT;
- goto getnodes_err1;
- }
-
- uself = (void __user *)node_ids.self;
- if (copy_to_user(uself, &self, sizeof(u16))) {
- err = -EFAULT;
- goto getnodes_err1;
- }
-
- if (copy_to_user(argp, &node_ids, sizeof(node_ids))) {
- err = -EFAULT;
- goto getnodes_err1;
- }
-getnodes_err1:
- kfree(nodes);
-getnodes_err2:
- return err;
- }
- case SCIF_REG:
- {
- struct scif_endpt *priv = f->private_data;
- struct scifioctl_reg reg;
- off_t ret;
-
- if (copy_from_user(®, argp, sizeof(reg))) {
- err = -EFAULT;
- goto reg_err;
- }
- if (reg.flags & SCIF_MAP_KERNEL) {
- err = -EINVAL;
- goto reg_err;
- }
- ret = scif_register(priv, (void *)reg.addr, reg.len,
- reg.offset, reg.prot, reg.flags);
- if (ret < 0) {
- err = (int)ret;
- goto reg_err;
- }
-
- if (copy_to_user(&((struct scifioctl_reg __user *)argp)
- ->out_offset, &ret, sizeof(reg.out_offset))) {
- err = -EFAULT;
- goto reg_err;
- }
- err = 0;
-reg_err:
- scif_err_debug(err, "scif_register");
- return err;
- }
- case SCIF_UNREG:
- {
- struct scif_endpt *priv = f->private_data;
- struct scifioctl_unreg unreg;
-
- if (copy_from_user(&unreg, argp, sizeof(unreg))) {
- err = -EFAULT;
- goto unreg_err;
- }
- err = scif_unregister(priv, unreg.offset, unreg.len);
-unreg_err:
- scif_err_debug(err, "scif_unregister");
- return err;
- }
- case SCIF_READFROM:
- {
- struct scif_endpt *priv = f->private_data;
- struct scifioctl_copy copy;
-
- if (copy_from_user(©, argp, sizeof(copy))) {
- err = -EFAULT;
- goto readfrom_err;
- }
- err = scif_readfrom(priv, copy.loffset, copy.len, copy.roffset,
- copy.flags);
-readfrom_err:
- scif_err_debug(err, "scif_readfrom");
- return err;
- }
- case SCIF_WRITETO:
- {
- struct scif_endpt *priv = f->private_data;
- struct scifioctl_copy copy;
-
- if (copy_from_user(©, argp, sizeof(copy))) {
- err = -EFAULT;
- goto writeto_err;
- }
- err = scif_writeto(priv, copy.loffset, copy.len, copy.roffset,
- copy.flags);
-writeto_err:
- scif_err_debug(err, "scif_writeto");
- return err;
- }
- case SCIF_VREADFROM:
- {
- struct scif_endpt *priv = f->private_data;
- struct scifioctl_copy copy;
-
- if (copy_from_user(©, argp, sizeof(copy))) {
- err = -EFAULT;
- goto vreadfrom_err;
- }
- err = scif_vreadfrom(priv, (void __force *)copy.addr, copy.len,
- copy.roffset, copy.flags);
-vreadfrom_err:
- scif_err_debug(err, "scif_vreadfrom");
- return err;
- }
- case SCIF_VWRITETO:
- {
- struct scif_endpt *priv = f->private_data;
- struct scifioctl_copy copy;
-
- if (copy_from_user(©, argp, sizeof(copy))) {
- err = -EFAULT;
- goto vwriteto_err;
- }
- err = scif_vwriteto(priv, (void __force *)copy.addr, copy.len,
- copy.roffset, copy.flags);
-vwriteto_err:
- scif_err_debug(err, "scif_vwriteto");
- return err;
- }
- case SCIF_FENCE_MARK:
- {
- struct scif_endpt *priv = f->private_data;
- struct scifioctl_fence_mark mark;
- int tmp_mark = 0;
-
- if (copy_from_user(&mark, argp, sizeof(mark))) {
- err = -EFAULT;
- goto fence_mark_err;
- }
- err = scif_fence_mark(priv, mark.flags, &tmp_mark);
- if (err)
- goto fence_mark_err;
- if (copy_to_user((void __user *)mark.mark, &tmp_mark,
- sizeof(tmp_mark))) {
- err = -EFAULT;
- goto fence_mark_err;
- }
-fence_mark_err:
- scif_err_debug(err, "scif_fence_mark");
- return err;
- }
- case SCIF_FENCE_WAIT:
- {
- struct scif_endpt *priv = f->private_data;
-
- err = scif_fence_wait(priv, arg);
- scif_err_debug(err, "scif_fence_wait");
- return err;
- }
- case SCIF_FENCE_SIGNAL:
- {
- struct scif_endpt *priv = f->private_data;
- struct scifioctl_fence_signal signal;
-
- if (copy_from_user(&signal, argp, sizeof(signal))) {
- err = -EFAULT;
- goto fence_signal_err;
- }
-
- err = scif_fence_signal(priv, signal.loff, signal.lval,
- signal.roff, signal.rval, signal.flags);
-fence_signal_err:
- scif_err_debug(err, "scif_fence_signal");
- return err;
- }
- }
- return -EINVAL;
-}
-
-const struct file_operations scif_fops = {
- .open = scif_fdopen,
- .release = scif_fdclose,
- .unlocked_ioctl = scif_fdioctl,
- .mmap = scif_fdmmap,
- .poll = scif_fdpoll,
- .flush = scif_fdflush,
- .owner = THIS_MODULE,
-};
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2015 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-
-#include "scif_main.h"
-
-/**
- * scif_recv_mark: Handle SCIF_MARK request
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * The peer has requested a mark.
- */
-void scif_recv_mark(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_endpt *ep = (struct scif_endpt *)msg->payload[0];
- int mark = 0;
- int err;
-
- err = _scif_fence_mark(ep, &mark);
- if (err)
- msg->uop = SCIF_MARK_NACK;
- else
- msg->uop = SCIF_MARK_ACK;
- msg->payload[0] = ep->remote_ep;
- msg->payload[2] = mark;
- scif_nodeqp_send(ep->remote_dev, msg);
-}
-
-/**
- * scif_recv_mark_resp: Handle SCIF_MARK_(N)ACK messages.
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * The peer has responded to a SCIF_MARK message.
- */
-void scif_recv_mark_resp(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_endpt *ep = (struct scif_endpt *)msg->payload[0];
- struct scif_fence_info *fence_req =
- (struct scif_fence_info *)msg->payload[1];
-
- mutex_lock(&ep->rma_info.rma_lock);
- if (msg->uop == SCIF_MARK_ACK) {
- fence_req->state = OP_COMPLETED;
- fence_req->dma_mark = (int)msg->payload[2];
- } else {
- fence_req->state = OP_FAILED;
- }
- mutex_unlock(&ep->rma_info.rma_lock);
- complete(&fence_req->comp);
-}
-
-/**
- * scif_recv_wait: Handle SCIF_WAIT request
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * The peer has requested waiting on a fence.
- */
-void scif_recv_wait(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_endpt *ep = (struct scif_endpt *)msg->payload[0];
- struct scif_remote_fence_info *fence;
-
- /*
- * Allocate structure for remote fence information and
- * send a NACK if the allocation failed. The peer will
- * return ENOMEM upon receiving a NACK.
- */
- fence = kmalloc(sizeof(*fence), GFP_KERNEL);
- if (!fence) {
- msg->payload[0] = ep->remote_ep;
- msg->uop = SCIF_WAIT_NACK;
- scif_nodeqp_send(ep->remote_dev, msg);
- return;
- }
-
- /* Prepare the fence request */
- memcpy(&fence->msg, msg, sizeof(struct scifmsg));
- INIT_LIST_HEAD(&fence->list);
-
- /* Insert to the global remote fence request list */
- mutex_lock(&scif_info.fencelock);
- atomic_inc(&ep->rma_info.fence_refcount);
- list_add_tail(&fence->list, &scif_info.fence);
- mutex_unlock(&scif_info.fencelock);
-
- schedule_work(&scif_info.misc_work);
-}
-
-/**
- * scif_recv_wait_resp: Handle SCIF_WAIT_(N)ACK messages.
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * The peer has responded to a SCIF_WAIT message.
- */
-void scif_recv_wait_resp(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_endpt *ep = (struct scif_endpt *)msg->payload[0];
- struct scif_fence_info *fence_req =
- (struct scif_fence_info *)msg->payload[1];
-
- mutex_lock(&ep->rma_info.rma_lock);
- if (msg->uop == SCIF_WAIT_ACK)
- fence_req->state = OP_COMPLETED;
- else
- fence_req->state = OP_FAILED;
- mutex_unlock(&ep->rma_info.rma_lock);
- complete(&fence_req->comp);
-}
-
-/**
- * scif_recv_sig_local: Handle SCIF_SIG_LOCAL request
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * The peer has requested a signal on a local offset.
- */
-void scif_recv_sig_local(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_endpt *ep = (struct scif_endpt *)msg->payload[0];
- int err;
-
- err = scif_prog_signal(ep, msg->payload[1], msg->payload[2],
- SCIF_WINDOW_SELF);
- if (err)
- msg->uop = SCIF_SIG_NACK;
- else
- msg->uop = SCIF_SIG_ACK;
- msg->payload[0] = ep->remote_ep;
- scif_nodeqp_send(ep->remote_dev, msg);
-}
-
-/**
- * scif_recv_sig_remote: Handle SCIF_SIGNAL_REMOTE request
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * The peer has requested a signal on a remote offset.
- */
-void scif_recv_sig_remote(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_endpt *ep = (struct scif_endpt *)msg->payload[0];
- int err;
-
- err = scif_prog_signal(ep, msg->payload[1], msg->payload[2],
- SCIF_WINDOW_PEER);
- if (err)
- msg->uop = SCIF_SIG_NACK;
- else
- msg->uop = SCIF_SIG_ACK;
- msg->payload[0] = ep->remote_ep;
- scif_nodeqp_send(ep->remote_dev, msg);
-}
-
-/**
- * scif_recv_sig_resp: Handle SCIF_SIG_(N)ACK messages.
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * The peer has responded to a signal request.
- */
-void scif_recv_sig_resp(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_endpt *ep = (struct scif_endpt *)msg->payload[0];
- struct scif_fence_info *fence_req =
- (struct scif_fence_info *)msg->payload[3];
-
- mutex_lock(&ep->rma_info.rma_lock);
- if (msg->uop == SCIF_SIG_ACK)
- fence_req->state = OP_COMPLETED;
- else
- fence_req->state = OP_FAILED;
- mutex_unlock(&ep->rma_info.rma_lock);
- complete(&fence_req->comp);
-}
-
-static inline void *scif_get_local_va(off_t off, struct scif_window *window)
-{
- struct page **pages = window->pinned_pages->pages;
- int page_nr = (off - window->offset) >> PAGE_SHIFT;
- off_t page_off = off & ~PAGE_MASK;
-
- return page_address(pages[page_nr]) + page_off;
-}
-
-static void scif_prog_signal_cb(void *arg)
-{
- struct scif_cb_arg *cb_arg = arg;
-
- dma_pool_free(cb_arg->ep->remote_dev->signal_pool, cb_arg->status,
- cb_arg->src_dma_addr);
- kfree(cb_arg);
-}
-
-static int _scif_prog_signal(scif_epd_t epd, dma_addr_t dst, u64 val)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- struct dma_chan *chan = ep->rma_info.dma_chan;
- struct dma_device *ddev = chan->device;
- bool x100 = !is_dma_copy_aligned(chan->device, 1, 1, 1);
- struct dma_async_tx_descriptor *tx;
- struct scif_status *status = NULL;
- struct scif_cb_arg *cb_arg = NULL;
- dma_addr_t src;
- dma_cookie_t cookie;
- int err;
-
- tx = ddev->device_prep_dma_memcpy(chan, 0, 0, 0, DMA_PREP_FENCE);
- if (!tx) {
- err = -ENOMEM;
- dev_err(&ep->remote_dev->sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- goto alloc_fail;
- }
- cookie = tx->tx_submit(tx);
- if (dma_submit_error(cookie)) {
- err = (int)cookie;
- dev_err(&ep->remote_dev->sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- goto alloc_fail;
- }
- dma_async_issue_pending(chan);
- if (x100) {
- /*
- * For X100 use the status descriptor to write the value to
- * the destination.
- */
- tx = ddev->device_prep_dma_imm_data(chan, dst, val, 0);
- } else {
- status = dma_pool_alloc(ep->remote_dev->signal_pool, GFP_KERNEL,
- &src);
- if (!status) {
- err = -ENOMEM;
- dev_err(&ep->remote_dev->sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- goto alloc_fail;
- }
- status->val = val;
- status->src_dma_addr = src;
- status->ep = ep;
- src += offsetof(struct scif_status, val);
- tx = ddev->device_prep_dma_memcpy(chan, dst, src, sizeof(val),
- DMA_PREP_INTERRUPT);
- }
- if (!tx) {
- err = -ENOMEM;
- dev_err(&ep->remote_dev->sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- goto dma_fail;
- }
- if (!x100) {
- cb_arg = kmalloc(sizeof(*cb_arg), GFP_KERNEL);
- if (!cb_arg) {
- err = -ENOMEM;
- goto dma_fail;
- }
- cb_arg->src_dma_addr = src;
- cb_arg->status = status;
- cb_arg->ep = ep;
- tx->callback = scif_prog_signal_cb;
- tx->callback_param = cb_arg;
- }
- cookie = tx->tx_submit(tx);
- if (dma_submit_error(cookie)) {
- err = -EIO;
- dev_err(&ep->remote_dev->sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- goto dma_fail;
- }
- dma_async_issue_pending(chan);
- return 0;
-dma_fail:
- if (!x100) {
- dma_pool_free(ep->remote_dev->signal_pool, status,
- src - offsetof(struct scif_status, val));
- kfree(cb_arg);
- }
-alloc_fail:
- return err;
-}
-
-/**
- * scif_prog_signal:
- * @epd: Endpoint Descriptor
- * @offset: registered address to write @val to
- * @val: Value to be written at @offset
- * @type: Type of the window.
- *
- * Arrange to write a value to the registered offset after ensuring that the
- * offset provided is indeed valid.
- */
-int scif_prog_signal(scif_epd_t epd, off_t offset, u64 val,
- enum scif_window_type type)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- struct scif_window *window = NULL;
- struct scif_rma_req req;
- dma_addr_t dst_dma_addr;
- int err;
-
- mutex_lock(&ep->rma_info.rma_lock);
- req.out_window = &window;
- req.offset = offset;
- req.nr_bytes = sizeof(u64);
- req.prot = SCIF_PROT_WRITE;
- req.type = SCIF_WINDOW_SINGLE;
- if (type == SCIF_WINDOW_SELF)
- req.head = &ep->rma_info.reg_list;
- else
- req.head = &ep->rma_info.remote_reg_list;
- /* Does a valid window exist? */
- err = scif_query_window(&req);
- if (err) {
- dev_err(scif_info.mdev.this_device,
- "%s %d err %d\n", __func__, __LINE__, err);
- goto unlock_ret;
- }
-
- if (scif_is_mgmt_node() && scifdev_self(ep->remote_dev)) {
- u64 *dst_virt;
-
- if (type == SCIF_WINDOW_SELF)
- dst_virt = scif_get_local_va(offset, window);
- else
- dst_virt =
- scif_get_local_va(offset, (struct scif_window *)
- window->peer_window);
- *dst_virt = val;
- } else {
- dst_dma_addr = __scif_off_to_dma_addr(window, offset);
- err = _scif_prog_signal(epd, dst_dma_addr, val);
- }
-unlock_ret:
- mutex_unlock(&ep->rma_info.rma_lock);
- return err;
-}
-
-static int _scif_fence_wait(scif_epd_t epd, int mark)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- dma_cookie_t cookie = mark & ~SCIF_REMOTE_FENCE;
- int err;
-
- /* Wait for DMA callback in scif_fence_mark_cb(..) */
- err = wait_event_interruptible_timeout(ep->rma_info.markwq,
- dma_async_is_tx_complete(
- ep->rma_info.dma_chan,
- cookie, NULL, NULL) ==
- DMA_COMPLETE,
- SCIF_NODE_ALIVE_TIMEOUT);
- if (!err)
- err = -ETIMEDOUT;
- else if (err > 0)
- err = 0;
- return err;
-}
-
-/**
- * scif_rma_handle_remote_fences:
- *
- * This routine services remote fence requests.
- */
-void scif_rma_handle_remote_fences(void)
-{
- struct list_head *item, *tmp;
- struct scif_remote_fence_info *fence;
- struct scif_endpt *ep;
- int mark, err;
-
- might_sleep();
- mutex_lock(&scif_info.fencelock);
- list_for_each_safe(item, tmp, &scif_info.fence) {
- fence = list_entry(item, struct scif_remote_fence_info,
- list);
- /* Remove fence from global list */
- list_del(&fence->list);
-
- /* Initiate the fence operation */
- ep = (struct scif_endpt *)fence->msg.payload[0];
- mark = fence->msg.payload[2];
- err = _scif_fence_wait(ep, mark);
- if (err)
- fence->msg.uop = SCIF_WAIT_NACK;
- else
- fence->msg.uop = SCIF_WAIT_ACK;
- fence->msg.payload[0] = ep->remote_ep;
- scif_nodeqp_send(ep->remote_dev, &fence->msg);
- kfree(fence);
- if (!atomic_sub_return(1, &ep->rma_info.fence_refcount))
- schedule_work(&scif_info.misc_work);
- }
- mutex_unlock(&scif_info.fencelock);
-}
-
-static int _scif_send_fence(scif_epd_t epd, int uop, int mark, int *out_mark)
-{
- int err;
- struct scifmsg msg;
- struct scif_fence_info *fence_req;
- struct scif_endpt *ep = (struct scif_endpt *)epd;
-
- fence_req = kmalloc(sizeof(*fence_req), GFP_KERNEL);
- if (!fence_req) {
- err = -ENOMEM;
- goto error;
- }
-
- fence_req->state = OP_IN_PROGRESS;
- init_completion(&fence_req->comp);
-
- msg.src = ep->port;
- msg.uop = uop;
- msg.payload[0] = ep->remote_ep;
- msg.payload[1] = (u64)fence_req;
- if (uop == SCIF_WAIT)
- msg.payload[2] = mark;
- spin_lock(&ep->lock);
- if (ep->state == SCIFEP_CONNECTED)
- err = scif_nodeqp_send(ep->remote_dev, &msg);
- else
- err = -ENOTCONN;
- spin_unlock(&ep->lock);
- if (err)
- goto error_free;
-retry:
- /* Wait for a SCIF_WAIT_(N)ACK message */
- err = wait_for_completion_timeout(&fence_req->comp,
- SCIF_NODE_ALIVE_TIMEOUT);
- if (!err && scifdev_alive(ep))
- goto retry;
- if (!err)
- err = -ENODEV;
- if (err > 0)
- err = 0;
- mutex_lock(&ep->rma_info.rma_lock);
- if (err < 0) {
- if (fence_req->state == OP_IN_PROGRESS)
- fence_req->state = OP_FAILED;
- }
- if (fence_req->state == OP_FAILED && !err)
- err = -ENOMEM;
- if (uop == SCIF_MARK && fence_req->state == OP_COMPLETED)
- *out_mark = SCIF_REMOTE_FENCE | fence_req->dma_mark;
- mutex_unlock(&ep->rma_info.rma_lock);
-error_free:
- kfree(fence_req);
-error:
- return err;
-}
-
-/**
- * scif_send_fence_mark:
- * @epd: end point descriptor.
- * @out_mark: Output DMA mark reported by peer.
- *
- * Send a remote fence mark request.
- */
-static int scif_send_fence_mark(scif_epd_t epd, int *out_mark)
-{
- return _scif_send_fence(epd, SCIF_MARK, 0, out_mark);
-}
-
-/**
- * scif_send_fence_wait:
- * @epd: end point descriptor.
- * @mark: DMA mark to wait for.
- *
- * Send a remote fence wait request.
- */
-static int scif_send_fence_wait(scif_epd_t epd, int mark)
-{
- return _scif_send_fence(epd, SCIF_WAIT, mark, NULL);
-}
-
-static int _scif_send_fence_signal_wait(struct scif_endpt *ep,
- struct scif_fence_info *fence_req)
-{
- int err;
-
-retry:
- /* Wait for a SCIF_SIG_(N)ACK message */
- err = wait_for_completion_timeout(&fence_req->comp,
- SCIF_NODE_ALIVE_TIMEOUT);
- if (!err && scifdev_alive(ep))
- goto retry;
- if (!err)
- err = -ENODEV;
- if (err > 0)
- err = 0;
- if (err < 0) {
- mutex_lock(&ep->rma_info.rma_lock);
- if (fence_req->state == OP_IN_PROGRESS)
- fence_req->state = OP_FAILED;
- mutex_unlock(&ep->rma_info.rma_lock);
- }
- if (fence_req->state == OP_FAILED && !err)
- err = -ENXIO;
- return err;
-}
-
-/**
- * scif_send_fence_signal:
- * @epd: endpoint descriptor
- * @loff: local offset
- * @lval: local value to write to loffset
- * @roff: remote offset
- * @rval: remote value to write to roffset
- * @flags: flags
- *
- * Sends a remote fence signal request
- */
-static int scif_send_fence_signal(scif_epd_t epd, off_t roff, u64 rval,
- off_t loff, u64 lval, int flags)
-{
- int err = 0;
- struct scifmsg msg;
- struct scif_fence_info *fence_req;
- struct scif_endpt *ep = (struct scif_endpt *)epd;
-
- fence_req = kmalloc(sizeof(*fence_req), GFP_KERNEL);
- if (!fence_req) {
- err = -ENOMEM;
- goto error;
- }
-
- fence_req->state = OP_IN_PROGRESS;
- init_completion(&fence_req->comp);
- msg.src = ep->port;
- if (flags & SCIF_SIGNAL_LOCAL) {
- msg.uop = SCIF_SIG_LOCAL;
- msg.payload[0] = ep->remote_ep;
- msg.payload[1] = roff;
- msg.payload[2] = rval;
- msg.payload[3] = (u64)fence_req;
- spin_lock(&ep->lock);
- if (ep->state == SCIFEP_CONNECTED)
- err = scif_nodeqp_send(ep->remote_dev, &msg);
- else
- err = -ENOTCONN;
- spin_unlock(&ep->lock);
- if (err)
- goto error_free;
- err = _scif_send_fence_signal_wait(ep, fence_req);
- if (err)
- goto error_free;
- }
- fence_req->state = OP_IN_PROGRESS;
-
- if (flags & SCIF_SIGNAL_REMOTE) {
- msg.uop = SCIF_SIG_REMOTE;
- msg.payload[0] = ep->remote_ep;
- msg.payload[1] = loff;
- msg.payload[2] = lval;
- msg.payload[3] = (u64)fence_req;
- spin_lock(&ep->lock);
- if (ep->state == SCIFEP_CONNECTED)
- err = scif_nodeqp_send(ep->remote_dev, &msg);
- else
- err = -ENOTCONN;
- spin_unlock(&ep->lock);
- if (err)
- goto error_free;
- err = _scif_send_fence_signal_wait(ep, fence_req);
- }
-error_free:
- kfree(fence_req);
-error:
- return err;
-}
-
-static void scif_fence_mark_cb(void *arg)
-{
- struct scif_endpt *ep = (struct scif_endpt *)arg;
-
- wake_up_interruptible(&ep->rma_info.markwq);
- atomic_dec(&ep->rma_info.fence_refcount);
-}
-
-/**
- * _scif_fence_mark:
- * @epd: endpoint descriptor
- * @mark: DMA mark to set-up
- *
- * Set up a mark for this endpoint and return the value of the mark.
- */
-int _scif_fence_mark(scif_epd_t epd, int *mark)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- struct dma_chan *chan = ep->rma_info.dma_chan;
- struct dma_device *ddev = chan->device;
- struct dma_async_tx_descriptor *tx;
- dma_cookie_t cookie;
- int err;
-
- tx = ddev->device_prep_dma_memcpy(chan, 0, 0, 0, DMA_PREP_FENCE);
- if (!tx) {
- err = -ENOMEM;
- dev_err(&ep->remote_dev->sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- return err;
- }
- cookie = tx->tx_submit(tx);
- if (dma_submit_error(cookie)) {
- err = (int)cookie;
- dev_err(&ep->remote_dev->sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- return err;
- }
- dma_async_issue_pending(chan);
- tx = ddev->device_prep_dma_interrupt(chan, DMA_PREP_INTERRUPT);
- if (!tx) {
- err = -ENOMEM;
- dev_err(&ep->remote_dev->sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- return err;
- }
- tx->callback = scif_fence_mark_cb;
- tx->callback_param = ep;
- *mark = cookie = tx->tx_submit(tx);
- if (dma_submit_error(cookie)) {
- err = (int)cookie;
- dev_err(&ep->remote_dev->sdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- return err;
- }
- atomic_inc(&ep->rma_info.fence_refcount);
- dma_async_issue_pending(chan);
- return 0;
-}
-
-#define SCIF_LOOPB_MAGIC_MARK 0xdead
-
-int scif_fence_mark(scif_epd_t epd, int flags, int *mark)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- int err = 0;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI fence_mark: ep %p flags 0x%x mark 0x%x\n",
- ep, flags, *mark);
- err = scif_verify_epd(ep);
- if (err)
- return err;
-
- /* Invalid flags? */
- if (flags & ~(SCIF_FENCE_INIT_SELF | SCIF_FENCE_INIT_PEER))
- return -EINVAL;
-
- /* At least one of init self or peer RMA should be set */
- if (!(flags & (SCIF_FENCE_INIT_SELF | SCIF_FENCE_INIT_PEER)))
- return -EINVAL;
-
- /* Exactly one of init self or peer RMA should be set but not both */
- if ((flags & SCIF_FENCE_INIT_SELF) && (flags & SCIF_FENCE_INIT_PEER))
- return -EINVAL;
-
- /*
- * Management node loopback does not need to use DMA.
- * Return a valid mark to be symmetric.
- */
- if (scifdev_self(ep->remote_dev) && scif_is_mgmt_node()) {
- *mark = SCIF_LOOPB_MAGIC_MARK;
- return 0;
- }
-
- if (flags & SCIF_FENCE_INIT_SELF)
- err = _scif_fence_mark(epd, mark);
- else
- err = scif_send_fence_mark(ep, mark);
-
- if (err)
- dev_err(scif_info.mdev.this_device,
- "%s %d err %d\n", __func__, __LINE__, err);
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI fence_mark: ep %p flags 0x%x mark 0x%x err %d\n",
- ep, flags, *mark, err);
- return err;
-}
-EXPORT_SYMBOL_GPL(scif_fence_mark);
-
-int scif_fence_wait(scif_epd_t epd, int mark)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- int err = 0;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI fence_wait: ep %p mark 0x%x\n",
- ep, mark);
- err = scif_verify_epd(ep);
- if (err)
- return err;
- /*
- * Management node loopback does not need to use DMA.
- * The only valid mark provided is 0 so simply
- * return success if the mark is valid.
- */
- if (scifdev_self(ep->remote_dev) && scif_is_mgmt_node()) {
- if (mark == SCIF_LOOPB_MAGIC_MARK)
- return 0;
- else
- return -EINVAL;
- }
- if (mark & SCIF_REMOTE_FENCE)
- err = scif_send_fence_wait(epd, mark);
- else
- err = _scif_fence_wait(epd, mark);
- if (err < 0)
- dev_err(scif_info.mdev.this_device,
- "%s %d err %d\n", __func__, __LINE__, err);
- return err;
-}
-EXPORT_SYMBOL_GPL(scif_fence_wait);
-
-int scif_fence_signal(scif_epd_t epd, off_t loff, u64 lval,
- off_t roff, u64 rval, int flags)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- int err = 0;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI fence_signal: ep %p loff 0x%lx lval 0x%llx roff 0x%lx rval 0x%llx flags 0x%x\n",
- ep, loff, lval, roff, rval, flags);
- err = scif_verify_epd(ep);
- if (err)
- return err;
-
- /* Invalid flags? */
- if (flags & ~(SCIF_FENCE_INIT_SELF | SCIF_FENCE_INIT_PEER |
- SCIF_SIGNAL_LOCAL | SCIF_SIGNAL_REMOTE))
- return -EINVAL;
-
- /* At least one of init self or peer RMA should be set */
- if (!(flags & (SCIF_FENCE_INIT_SELF | SCIF_FENCE_INIT_PEER)))
- return -EINVAL;
-
- /* Exactly one of init self or peer RMA should be set but not both */
- if ((flags & SCIF_FENCE_INIT_SELF) && (flags & SCIF_FENCE_INIT_PEER))
- return -EINVAL;
-
- /* At least one of SCIF_SIGNAL_LOCAL or SCIF_SIGNAL_REMOTE required */
- if (!(flags & (SCIF_SIGNAL_LOCAL | SCIF_SIGNAL_REMOTE)))
- return -EINVAL;
-
- /* Only Dword offsets allowed */
- if ((flags & SCIF_SIGNAL_LOCAL) && (loff & (sizeof(u32) - 1)))
- return -EINVAL;
-
- /* Only Dword aligned offsets allowed */
- if ((flags & SCIF_SIGNAL_REMOTE) && (roff & (sizeof(u32) - 1)))
- return -EINVAL;
-
- if (flags & SCIF_FENCE_INIT_PEER) {
- err = scif_send_fence_signal(epd, roff, rval, loff,
- lval, flags);
- } else {
- /* Local Signal in Local RAS */
- if (flags & SCIF_SIGNAL_LOCAL) {
- err = scif_prog_signal(epd, loff, lval,
- SCIF_WINDOW_SELF);
- if (err)
- goto error_ret;
- }
-
- /* Signal in Remote RAS */
- if (flags & SCIF_SIGNAL_REMOTE)
- err = scif_prog_signal(epd, roff,
- rval, SCIF_WINDOW_PEER);
- }
-error_ret:
- if (err)
- dev_err(scif_info.mdev.this_device,
- "%s %d err %d\n", __func__, __LINE__, err);
- return err;
-}
-EXPORT_SYMBOL_GPL(scif_fence_signal);
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#include <linux/module.h>
-#include <linux/idr.h>
-
-#include <linux/mic_common.h>
-#include "../common/mic_dev.h"
-#include "../bus/scif_bus.h"
-#include "scif_peer_bus.h"
-#include "scif_main.h"
-#include "scif_map.h"
-
-struct scif_info scif_info = {
- .mdev = {
- .minor = MISC_DYNAMIC_MINOR,
- .name = "scif",
- .fops = &scif_fops,
- }
-};
-
-struct scif_dev *scif_dev;
-struct kmem_cache *unaligned_cache;
-static atomic_t g_loopb_cnt;
-
-/* Runs in the context of intr_wq */
-static void scif_intr_bh_handler(struct work_struct *work)
-{
- struct scif_dev *scifdev =
- container_of(work, struct scif_dev, intr_bh);
-
- if (scifdev_self(scifdev))
- scif_loopb_msg_handler(scifdev, scifdev->qpairs);
- else
- scif_nodeqp_intrhandler(scifdev, scifdev->qpairs);
-}
-
-int scif_setup_intr_wq(struct scif_dev *scifdev)
-{
- if (!scifdev->intr_wq) {
- snprintf(scifdev->intr_wqname, sizeof(scifdev->intr_wqname),
- "SCIF INTR %d", scifdev->node);
- scifdev->intr_wq =
- alloc_ordered_workqueue(scifdev->intr_wqname, 0);
- if (!scifdev->intr_wq)
- return -ENOMEM;
- INIT_WORK(&scifdev->intr_bh, scif_intr_bh_handler);
- }
- return 0;
-}
-
-void scif_destroy_intr_wq(struct scif_dev *scifdev)
-{
- if (scifdev->intr_wq) {
- destroy_workqueue(scifdev->intr_wq);
- scifdev->intr_wq = NULL;
- }
-}
-
-irqreturn_t scif_intr_handler(int irq, void *data)
-{
- struct scif_dev *scifdev = data;
- struct scif_hw_dev *sdev = scifdev->sdev;
-
- sdev->hw_ops->ack_interrupt(sdev, scifdev->db);
- queue_work(scifdev->intr_wq, &scifdev->intr_bh);
- return IRQ_HANDLED;
-}
-
-static void scif_qp_setup_handler(struct work_struct *work)
-{
- struct scif_dev *scifdev = container_of(work, struct scif_dev,
- qp_dwork.work);
- struct scif_hw_dev *sdev = scifdev->sdev;
- dma_addr_t da = 0;
- int err;
-
- if (scif_is_mgmt_node()) {
- struct mic_bootparam *bp = sdev->dp;
-
- da = bp->scif_card_dma_addr;
- scifdev->rdb = bp->h2c_scif_db;
- } else {
- struct mic_bootparam __iomem *bp = sdev->rdp;
-
- da = readq(&bp->scif_host_dma_addr);
- scifdev->rdb = ioread8(&bp->c2h_scif_db);
- }
- if (da) {
- err = scif_qp_response(da, scifdev);
- if (err)
- dev_err(&scifdev->sdev->dev,
- "scif_qp_response err %d\n", err);
- } else {
- schedule_delayed_work(&scifdev->qp_dwork,
- msecs_to_jiffies(1000));
- }
-}
-
-static int scif_setup_scifdev(void)
-{
- /* We support a maximum of 129 SCIF nodes including the mgmt node */
-#define MAX_SCIF_NODES 129
- int i;
- u8 num_nodes = MAX_SCIF_NODES;
-
- scif_dev = kcalloc(num_nodes, sizeof(*scif_dev), GFP_KERNEL);
- if (!scif_dev)
- return -ENOMEM;
- for (i = 0; i < num_nodes; i++) {
- struct scif_dev *scifdev = &scif_dev[i];
-
- scifdev->node = i;
- scifdev->exit = OP_IDLE;
- init_waitqueue_head(&scifdev->disconn_wq);
- mutex_init(&scifdev->lock);
- INIT_WORK(&scifdev->peer_add_work, scif_add_peer_device);
- INIT_DELAYED_WORK(&scifdev->p2p_dwork,
- scif_poll_qp_state);
- INIT_DELAYED_WORK(&scifdev->qp_dwork,
- scif_qp_setup_handler);
- INIT_LIST_HEAD(&scifdev->p2p);
- RCU_INIT_POINTER(scifdev->spdev, NULL);
- }
- return 0;
-}
-
-static void scif_destroy_scifdev(void)
-{
- kfree(scif_dev);
- scif_dev = NULL;
-}
-
-static int scif_probe(struct scif_hw_dev *sdev)
-{
- struct scif_dev *scifdev = &scif_dev[sdev->dnode];
- int rc;
-
- dev_set_drvdata(&sdev->dev, sdev);
- scifdev->sdev = sdev;
-
- if (1 == atomic_add_return(1, &g_loopb_cnt)) {
- struct scif_dev *loopb_dev = &scif_dev[sdev->snode];
-
- loopb_dev->sdev = sdev;
- rc = scif_setup_loopback_qp(loopb_dev);
- if (rc)
- goto exit;
- }
-
- rc = scif_setup_intr_wq(scifdev);
- if (rc)
- goto destroy_loopb;
- rc = scif_setup_qp(scifdev);
- if (rc)
- goto destroy_intr;
- scifdev->db = sdev->hw_ops->next_db(sdev);
- scifdev->cookie = sdev->hw_ops->request_irq(sdev, scif_intr_handler,
- "SCIF_INTR", scifdev,
- scifdev->db);
- if (IS_ERR(scifdev->cookie)) {
- rc = PTR_ERR(scifdev->cookie);
- goto free_qp;
- }
- if (scif_is_mgmt_node()) {
- struct mic_bootparam *bp = sdev->dp;
-
- bp->c2h_scif_db = scifdev->db;
- bp->scif_host_dma_addr = scifdev->qp_dma_addr;
- } else {
- struct mic_bootparam __iomem *bp = sdev->rdp;
-
- iowrite8(scifdev->db, &bp->h2c_scif_db);
- writeq(scifdev->qp_dma_addr, &bp->scif_card_dma_addr);
- }
- schedule_delayed_work(&scifdev->qp_dwork,
- msecs_to_jiffies(1000));
- return rc;
-free_qp:
- scif_free_qp(scifdev);
-destroy_intr:
- scif_destroy_intr_wq(scifdev);
-destroy_loopb:
- if (atomic_dec_and_test(&g_loopb_cnt))
- scif_destroy_loopback_qp(&scif_dev[sdev->snode]);
-exit:
- return rc;
-}
-
-void scif_stop(struct scif_dev *scifdev)
-{
- struct scif_dev *dev;
- int i;
-
- for (i = scif_info.maxid; i >= 0; i--) {
- dev = &scif_dev[i];
- if (scifdev_self(dev))
- continue;
- scif_handle_remove_node(i);
- }
-}
-
-static void scif_remove(struct scif_hw_dev *sdev)
-{
- struct scif_dev *scifdev = &scif_dev[sdev->dnode];
-
- if (scif_is_mgmt_node()) {
- struct mic_bootparam *bp = sdev->dp;
-
- bp->c2h_scif_db = -1;
- bp->scif_host_dma_addr = 0x0;
- } else {
- struct mic_bootparam __iomem *bp = sdev->rdp;
-
- iowrite8(-1, &bp->h2c_scif_db);
- writeq(0x0, &bp->scif_card_dma_addr);
- }
- if (scif_is_mgmt_node()) {
- scif_disconnect_node(scifdev->node, true);
- } else {
- scif_info.card_initiated_exit = true;
- scif_stop(scifdev);
- }
- if (atomic_dec_and_test(&g_loopb_cnt))
- scif_destroy_loopback_qp(&scif_dev[sdev->snode]);
- if (scifdev->cookie) {
- sdev->hw_ops->free_irq(sdev, scifdev->cookie, scifdev);
- scifdev->cookie = NULL;
- }
- scif_destroy_intr_wq(scifdev);
- cancel_delayed_work(&scifdev->qp_dwork);
- scif_free_qp(scifdev);
- scifdev->rdb = -1;
- scifdev->sdev = NULL;
-}
-
-static struct scif_hw_dev_id id_table[] = {
- { MIC_SCIF_DEV, SCIF_DEV_ANY_ID },
- { 0 },
-};
-
-static struct scif_driver scif_driver = {
- .driver.name = KBUILD_MODNAME,
- .driver.owner = THIS_MODULE,
- .id_table = id_table,
- .probe = scif_probe,
- .remove = scif_remove,
-};
-
-static int _scif_init(void)
-{
- int rc;
-
- mutex_init(&scif_info.eplock);
- spin_lock_init(&scif_info.rmalock);
- spin_lock_init(&scif_info.nb_connect_lock);
- spin_lock_init(&scif_info.port_lock);
- mutex_init(&scif_info.conflock);
- mutex_init(&scif_info.connlock);
- mutex_init(&scif_info.fencelock);
- INIT_LIST_HEAD(&scif_info.uaccept);
- INIT_LIST_HEAD(&scif_info.listen);
- INIT_LIST_HEAD(&scif_info.zombie);
- INIT_LIST_HEAD(&scif_info.connected);
- INIT_LIST_HEAD(&scif_info.disconnected);
- INIT_LIST_HEAD(&scif_info.rma);
- INIT_LIST_HEAD(&scif_info.rma_tc);
- INIT_LIST_HEAD(&scif_info.mmu_notif_cleanup);
- INIT_LIST_HEAD(&scif_info.fence);
- INIT_LIST_HEAD(&scif_info.nb_connect_list);
- init_waitqueue_head(&scif_info.exitwq);
- scif_info.rma_tc_limit = SCIF_RMA_TEMP_CACHE_LIMIT;
- scif_info.en_msg_log = 0;
- scif_info.p2p_enable = 1;
- rc = scif_setup_scifdev();
- if (rc)
- goto error;
- unaligned_cache = kmem_cache_create("Unaligned_DMA",
- SCIF_KMEM_UNALIGNED_BUF_SIZE,
- 0, SLAB_HWCACHE_ALIGN, NULL);
- if (!unaligned_cache) {
- rc = -ENOMEM;
- goto free_sdev;
- }
- INIT_WORK(&scif_info.misc_work, scif_misc_handler);
- INIT_WORK(&scif_info.mmu_notif_work, scif_mmu_notif_handler);
- INIT_WORK(&scif_info.conn_work, scif_conn_handler);
- idr_init(&scif_ports);
- return 0;
-free_sdev:
- scif_destroy_scifdev();
-error:
- return rc;
-}
-
-static void _scif_exit(void)
-{
- idr_destroy(&scif_ports);
- kmem_cache_destroy(unaligned_cache);
- scif_destroy_scifdev();
-}
-
-static int __init scif_init(void)
-{
- struct miscdevice *mdev = &scif_info.mdev;
- int rc;
-
- _scif_init();
- iova_cache_get();
- rc = scif_peer_bus_init();
- if (rc)
- goto exit;
- rc = scif_register_driver(&scif_driver);
- if (rc)
- goto peer_bus_exit;
- rc = misc_register(mdev);
- if (rc)
- goto unreg_scif;
- scif_init_debugfs();
- return 0;
-unreg_scif:
- scif_unregister_driver(&scif_driver);
-peer_bus_exit:
- scif_peer_bus_exit();
-exit:
- _scif_exit();
- return rc;
-}
-
-static void __exit scif_exit(void)
-{
- scif_exit_debugfs();
- misc_deregister(&scif_info.mdev);
- scif_unregister_driver(&scif_driver);
- scif_peer_bus_exit();
- iova_cache_put();
- _scif_exit();
-}
-
-module_init(scif_init);
-module_exit(scif_exit);
-
-MODULE_DEVICE_TABLE(scif, id_table);
-MODULE_AUTHOR("Intel Corporation");
-MODULE_DESCRIPTION("Intel(R) SCIF driver");
-MODULE_LICENSE("GPL v2");
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#ifndef SCIF_MAIN_H
-#define SCIF_MAIN_H
-
-#include <linux/sched/signal.h>
-#include <linux/pci.h>
-#include <linux/miscdevice.h>
-#include <linux/dmaengine.h>
-#include <linux/iova.h>
-#include <linux/anon_inodes.h>
-#include <linux/file.h>
-#include <linux/vmalloc.h>
-#include <linux/scif.h>
-#include "../common/mic_dev.h"
-
-#define SCIF_MGMT_NODE 0
-#define SCIF_DEFAULT_WATCHDOG_TO 30
-#define SCIF_NODE_ACCEPT_TIMEOUT (3 * HZ)
-#define SCIF_NODE_ALIVE_TIMEOUT (SCIF_DEFAULT_WATCHDOG_TO * HZ)
-#define SCIF_RMA_TEMP_CACHE_LIMIT 0x20000
-
-/*
- * Generic state used for certain node QP message exchanges
- * like Unregister, Alloc etc.
- */
-enum scif_msg_state {
- OP_IDLE = 1,
- OP_IN_PROGRESS,
- OP_COMPLETED,
- OP_FAILED
-};
-
-/*
- * struct scif_info - Global SCIF information
- *
- * @nodeid: Node ID this node is to others
- * @maxid: Max known node ID
- * @total: Total number of SCIF nodes
- * @nr_zombies: number of zombie endpoints
- * @eplock: Lock to synchronize listening, zombie endpoint lists
- * @connlock: Lock to synchronize connected and disconnected lists
- * @nb_connect_lock: Synchronize non blocking connect operations
- * @port_lock: Synchronize access to SCIF ports
- * @uaccept: List of user acceptreq waiting for acceptreg
- * @listen: List of listening end points
- * @zombie: List of zombie end points with pending RMA's
- * @connected: List of end points in connected state
- * @disconnected: List of end points in disconnected state
- * @nb_connect_list: List for non blocking connections
- * @misc_work: miscellaneous SCIF tasks
- * @conflock: Lock to synchronize SCIF node configuration changes
- * @en_msg_log: Enable debug message logging
- * @p2p_enable: Enable P2P SCIF network
- * @mdev: The MISC device
- * @conn_work: Work for workqueue handling all connections
- * @exitwq: Wait queue for waiting for an EXIT node QP message response
- * @loopb_dev: Dummy SCIF device used for loopback
- * @loopb_wq: Workqueue used for handling loopback messages
- * @loopb_wqname[16]: Name of loopback workqueue
- * @loopb_work: Used for submitting work to loopb_wq
- * @loopb_recv_q: List of messages received on the loopb_wq
- * @card_initiated_exit: set when the card has initiated the exit
- * @rmalock: Synchronize access to RMA operations
- * @fencelock: Synchronize access to list of remote fences requested.
- * @rma: List of temporary registered windows to be destroyed.
- * @rma_tc: List of temporary registered & cached Windows to be destroyed
- * @fence: List of remote fence requests
- * @mmu_notif_work: Work for registration caching MMU notifier workqueue
- * @mmu_notif_cleanup: List of temporary cached windows for reg cache
- * @rma_tc_limit: RMA temporary cache limit
- */
-struct scif_info {
- u8 nodeid;
- u8 maxid;
- u8 total;
- u32 nr_zombies;
- struct mutex eplock;
- struct mutex connlock;
- spinlock_t nb_connect_lock;
- spinlock_t port_lock;
- struct list_head uaccept;
- struct list_head listen;
- struct list_head zombie;
- struct list_head connected;
- struct list_head disconnected;
- struct list_head nb_connect_list;
- struct work_struct misc_work;
- struct mutex conflock;
- u8 en_msg_log;
- u8 p2p_enable;
- struct miscdevice mdev;
- struct work_struct conn_work;
- wait_queue_head_t exitwq;
- struct scif_dev *loopb_dev;
- struct workqueue_struct *loopb_wq;
- char loopb_wqname[16];
- struct work_struct loopb_work;
- struct list_head loopb_recv_q;
- bool card_initiated_exit;
- spinlock_t rmalock;
- struct mutex fencelock;
- struct list_head rma;
- struct list_head rma_tc;
- struct list_head fence;
- struct work_struct mmu_notif_work;
- struct list_head mmu_notif_cleanup;
- unsigned long rma_tc_limit;
-};
-
-/*
- * struct scif_p2p_info - SCIF mapping information used for P2P
- *
- * @ppi_peer_id - SCIF peer node id
- * @ppi_sg - Scatter list for bar information (One for mmio and one for aper)
- * @sg_nentries - Number of entries in the scatterlist
- * @ppi_da: DMA address for MMIO and APER bars
- * @ppi_len: Length of MMIO and APER bars
- * @ppi_list: Link in list of mapping information
- */
-struct scif_p2p_info {
- u8 ppi_peer_id;
- struct scatterlist *ppi_sg[2];
- u64 sg_nentries[2];
- dma_addr_t ppi_da[2];
- u64 ppi_len[2];
-#define SCIF_PPI_MMIO 0
-#define SCIF_PPI_APER 1
- struct list_head ppi_list;
-};
-
-/*
- * struct scif_dev - SCIF remote device specific fields
- *
- * @node: Node id
- * @p2p: List of P2P mapping information
- * @qpairs: The node queue pair for exchanging control messages
- * @intr_wq: Workqueue for handling Node QP messages
- * @intr_wqname: Name of node QP workqueue for handling interrupts
- * @intr_bh: Used for submitting work to intr_wq
- * @lock: Lock used for synchronizing access to the scif device
- * @sdev: SCIF hardware device on the SCIF hardware bus
- * @db: doorbell the peer will trigger to generate an interrupt on self
- * @rdb: Doorbell to trigger on the peer to generate an interrupt on the peer
- * @cookie: Cookie received while registering the interrupt handler
- * @peer_add_work: Work for handling device_add for peer devices
- * @p2p_dwork: Delayed work to enable polling for P2P state
- * @qp_dwork: Delayed work for enabling polling for remote QP information
- * @p2p_retry: Number of times to retry polling of P2P state
- * @base_addr: P2P aperture bar base address
- * @mic_mw mmio: The peer MMIO information used for P2P
- * @spdev: SCIF peer device on the SCIF peer bus
- * @node_remove_ack_pending: True if a node_remove_ack is pending
- * @exit_ack_pending: true if an exit_ack is pending
- * @disconn_wq: Used while waiting for a node remove response
- * @disconn_rescnt: Keeps track of number of node remove requests sent
- * @exit: Status of exit message
- * @qp_dma_addr: Queue pair DMA address passed to the peer
- * @dma_ch_idx: Round robin index for DMA channels
- * @signal_pool: DMA pool used for scheduling scif_fence_signal DMA's
-*/
-struct scif_dev {
- u8 node;
- struct list_head p2p;
- struct scif_qp *qpairs;
- struct workqueue_struct *intr_wq;
- char intr_wqname[16];
- struct work_struct intr_bh;
- struct mutex lock;
- struct scif_hw_dev *sdev;
- int db;
- int rdb;
- struct mic_irq *cookie;
- struct work_struct peer_add_work;
- struct delayed_work p2p_dwork;
- struct delayed_work qp_dwork;
- int p2p_retry;
- dma_addr_t base_addr;
- struct mic_mw mmio;
- struct scif_peer_dev __rcu *spdev;
- bool node_remove_ack_pending;
- bool exit_ack_pending;
- wait_queue_head_t disconn_wq;
- atomic_t disconn_rescnt;
- enum scif_msg_state exit;
- dma_addr_t qp_dma_addr;
- int dma_ch_idx;
- struct dma_pool *signal_pool;
-};
-
-extern bool scif_reg_cache_enable;
-extern bool scif_ulimit_check;
-extern struct scif_info scif_info;
-extern struct idr scif_ports;
-extern struct bus_type scif_peer_bus;
-extern struct scif_dev *scif_dev;
-extern const struct file_operations scif_fops;
-extern const struct file_operations scif_anon_fops;
-
-/* Size of the RB for the Node QP */
-#define SCIF_NODE_QP_SIZE 0x10000
-
-#include "scif_nodeqp.h"
-#include "scif_rma.h"
-#include "scif_rma_list.h"
-
-/*
- * scifdev_self:
- * @dev: The remote SCIF Device
- *
- * Returns true if the SCIF Device passed is the self aka Loopback SCIF device.
- */
-static inline int scifdev_self(struct scif_dev *dev)
-{
- return dev->node == scif_info.nodeid;
-}
-
-static inline bool scif_is_mgmt_node(void)
-{
- return !scif_info.nodeid;
-}
-
-/*
- * scifdev_is_p2p:
- * @dev: The remote SCIF Device
- *
- * Returns true if the SCIF Device is a MIC Peer to Peer SCIF device.
- */
-static inline bool scifdev_is_p2p(struct scif_dev *dev)
-{
- if (scif_is_mgmt_node())
- return false;
- else
- return dev != &scif_dev[SCIF_MGMT_NODE] &&
- !scifdev_self(dev);
-}
-
-/*
- * scifdev_alive:
- * @scifdev: The remote SCIF Device
- *
- * Returns true if the remote SCIF Device is running or sleeping for
- * this endpoint.
- */
-static inline int _scifdev_alive(struct scif_dev *scifdev)
-{
- struct scif_peer_dev *spdev;
-
- rcu_read_lock();
- spdev = rcu_dereference(scifdev->spdev);
- rcu_read_unlock();
- return !!spdev;
-}
-
-#include "scif_epd.h"
-
-void __init scif_init_debugfs(void);
-void scif_exit_debugfs(void);
-int scif_setup_intr_wq(struct scif_dev *scifdev);
-void scif_destroy_intr_wq(struct scif_dev *scifdev);
-void scif_cleanup_scifdev(struct scif_dev *dev);
-void scif_handle_remove_node(int node);
-void scif_disconnect_node(u32 node_id, bool mgmt_initiated);
-void scif_free_qp(struct scif_dev *dev);
-void scif_misc_handler(struct work_struct *work);
-void scif_stop(struct scif_dev *scifdev);
-irqreturn_t scif_intr_handler(int irq, void *data);
-#endif /* SCIF_MAIN_H */
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#ifndef SCIF_MAP_H
-#define SCIF_MAP_H
-
-#include "../bus/scif_bus.h"
-
-static __always_inline void *
-scif_alloc_coherent(dma_addr_t *dma_handle,
- struct scif_dev *scifdev, size_t size,
- gfp_t gfp)
-{
- void *va;
-
- if (scifdev_self(scifdev)) {
- va = kmalloc(size, gfp);
- if (va)
- *dma_handle = virt_to_phys(va);
- } else {
- va = dma_alloc_coherent(&scifdev->sdev->dev,
- size, dma_handle, gfp);
- if (va && scifdev_is_p2p(scifdev))
- *dma_handle = *dma_handle + scifdev->base_addr;
- }
- return va;
-}
-
-static __always_inline void
-scif_free_coherent(void *va, dma_addr_t local,
- struct scif_dev *scifdev, size_t size)
-{
- if (scifdev_self(scifdev)) {
- kfree(va);
- } else {
- if (scifdev_is_p2p(scifdev) && local > scifdev->base_addr)
- local = local - scifdev->base_addr;
- dma_free_coherent(&scifdev->sdev->dev,
- size, va, local);
- }
-}
-
-static __always_inline int
-scif_map_single(dma_addr_t *dma_handle,
- void *local, struct scif_dev *scifdev, size_t size)
-{
- int err = 0;
-
- if (scifdev_self(scifdev)) {
- *dma_handle = virt_to_phys((local));
- } else {
- *dma_handle = dma_map_single(&scifdev->sdev->dev,
- local, size, DMA_BIDIRECTIONAL);
- if (dma_mapping_error(&scifdev->sdev->dev, *dma_handle))
- err = -ENOMEM;
- else if (scifdev_is_p2p(scifdev))
- *dma_handle = *dma_handle + scifdev->base_addr;
- }
- if (err)
- *dma_handle = 0;
- return err;
-}
-
-static __always_inline void
-scif_unmap_single(dma_addr_t local, struct scif_dev *scifdev,
- size_t size)
-{
- if (!scifdev_self(scifdev)) {
- if (scifdev_is_p2p(scifdev))
- local = local - scifdev->base_addr;
- dma_unmap_single(&scifdev->sdev->dev, local,
- size, DMA_BIDIRECTIONAL);
- }
-}
-
-static __always_inline void *
-scif_ioremap(dma_addr_t phys, size_t size, struct scif_dev *scifdev)
-{
- void *out_virt;
- struct scif_hw_dev *sdev = scifdev->sdev;
-
- if (scifdev_self(scifdev))
- out_virt = phys_to_virt(phys);
- else
- out_virt = (void __force *)
- sdev->hw_ops->remap(sdev, phys, size);
- return out_virt;
-}
-
-static __always_inline void
-scif_iounmap(void *virt, size_t len, struct scif_dev *scifdev)
-{
- if (!scifdev_self(scifdev)) {
- struct scif_hw_dev *sdev = scifdev->sdev;
-
- sdev->hw_ops->unmap(sdev, (void __force __iomem *)virt);
- }
-}
-
-static __always_inline int
-scif_map_page(dma_addr_t *dma_handle, struct page *page,
- struct scif_dev *scifdev)
-{
- int err = 0;
-
- if (scifdev_self(scifdev)) {
- *dma_handle = page_to_phys(page);
- } else {
- struct scif_hw_dev *sdev = scifdev->sdev;
- *dma_handle = dma_map_page(&sdev->dev,
- page, 0x0, PAGE_SIZE,
- DMA_BIDIRECTIONAL);
- if (dma_mapping_error(&sdev->dev, *dma_handle))
- err = -ENOMEM;
- else if (scifdev_is_p2p(scifdev))
- *dma_handle = *dma_handle + scifdev->base_addr;
- }
- if (err)
- *dma_handle = 0;
- return err;
-}
-#endif /* SCIF_MAP_H */
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2015 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#include "scif_main.h"
-
-/*
- * struct scif_vma_info - Information about a remote memory mapping
- * created via scif_mmap(..)
- * @vma: VM area struct
- * @list: link to list of active vmas
- */
-struct scif_vma_info {
- struct vm_area_struct *vma;
- struct list_head list;
-};
-
-void scif_recv_munmap(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_rma_req req;
- struct scif_window *window = NULL;
- struct scif_window *recv_window =
- (struct scif_window *)msg->payload[0];
- struct scif_endpt *ep;
-
- ep = (struct scif_endpt *)recv_window->ep;
- req.out_window = &window;
- req.offset = recv_window->offset;
- req.prot = recv_window->prot;
- req.nr_bytes = recv_window->nr_pages << PAGE_SHIFT;
- req.type = SCIF_WINDOW_FULL;
- req.head = &ep->rma_info.reg_list;
- msg->payload[0] = ep->remote_ep;
-
- mutex_lock(&ep->rma_info.rma_lock);
- /* Does a valid window exist? */
- if (scif_query_window(&req)) {
- dev_err(&scifdev->sdev->dev,
- "%s %d -ENXIO\n", __func__, __LINE__);
- msg->uop = SCIF_UNREGISTER_ACK;
- goto error;
- }
-
- scif_put_window(window, window->nr_pages);
-
- if (!window->ref_count) {
- atomic_inc(&ep->rma_info.tw_refcount);
- ep->rma_info.async_list_del = 1;
- list_del_init(&window->list);
- scif_free_window_offset(ep, window, window->offset);
- }
-error:
- mutex_unlock(&ep->rma_info.rma_lock);
- if (window && !window->ref_count)
- scif_queue_for_cleanup(window, &scif_info.rma);
-}
-
-/*
- * Remove valid remote memory mappings created via scif_mmap(..) from the
- * process address space since the remote node is lost
- */
-static void __scif_zap_mmaps(struct scif_endpt *ep)
-{
- struct list_head *item;
- struct scif_vma_info *info;
- struct vm_area_struct *vma;
- unsigned long size;
-
- spin_lock(&ep->lock);
- list_for_each(item, &ep->rma_info.vma_list) {
- info = list_entry(item, struct scif_vma_info, list);
- vma = info->vma;
- size = vma->vm_end - vma->vm_start;
- zap_vma_ptes(vma, vma->vm_start, size);
- dev_dbg(scif_info.mdev.this_device,
- "%s ep %p zap vma %p size 0x%lx\n",
- __func__, ep, info->vma, size);
- }
- spin_unlock(&ep->lock);
-}
-
-/*
- * Traverse the list of endpoints for a particular remote node and
- * zap valid remote memory mappings since the remote node is lost
- */
-static void _scif_zap_mmaps(int node, struct list_head *head)
-{
- struct scif_endpt *ep;
- struct list_head *item;
-
- mutex_lock(&scif_info.connlock);
- list_for_each(item, head) {
- ep = list_entry(item, struct scif_endpt, list);
- if (ep->remote_dev->node == node)
- __scif_zap_mmaps(ep);
- }
- mutex_unlock(&scif_info.connlock);
-}
-
-/*
- * Wrapper for removing remote memory mappings for a particular node. This API
- * is called by peer nodes as part of handling a lost node.
- */
-void scif_zap_mmaps(int node)
-{
- _scif_zap_mmaps(node, &scif_info.connected);
- _scif_zap_mmaps(node, &scif_info.disconnected);
-}
-
-/*
- * This API is only called while handling a lost node:
- * a) Remote node is dead.
- * b) Remote memory mappings have been zapped
- * So we can traverse the remote_reg_list without any locks. Since
- * the window has not yet been unregistered we can drop the ref count
- * and queue it to the cleanup thread.
- */
-static void __scif_cleanup_rma_for_zombies(struct scif_endpt *ep)
-{
- struct list_head *pos, *tmp;
- struct scif_window *window;
-
- list_for_each_safe(pos, tmp, &ep->rma_info.remote_reg_list) {
- window = list_entry(pos, struct scif_window, list);
- if (window->ref_count)
- scif_put_window(window, window->nr_pages);
- else
- dev_err(scif_info.mdev.this_device,
- "%s %d unexpected\n",
- __func__, __LINE__);
- if (!window->ref_count) {
- atomic_inc(&ep->rma_info.tw_refcount);
- list_del_init(&window->list);
- scif_queue_for_cleanup(window, &scif_info.rma);
- }
- }
-}
-
-/* Cleanup remote registration lists for zombie endpoints */
-void scif_cleanup_rma_for_zombies(int node)
-{
- struct scif_endpt *ep;
- struct list_head *item;
-
- mutex_lock(&scif_info.eplock);
- list_for_each(item, &scif_info.zombie) {
- ep = list_entry(item, struct scif_endpt, list);
- if (ep->remote_dev && ep->remote_dev->node == node)
- __scif_cleanup_rma_for_zombies(ep);
- }
- mutex_unlock(&scif_info.eplock);
- flush_work(&scif_info.misc_work);
-}
-
-/* Insert the VMA into the per endpoint VMA list */
-static int scif_insert_vma(struct scif_endpt *ep, struct vm_area_struct *vma)
-{
- struct scif_vma_info *info;
- int err = 0;
-
- info = kzalloc(sizeof(*info), GFP_KERNEL);
- if (!info) {
- err = -ENOMEM;
- goto done;
- }
- info->vma = vma;
- spin_lock(&ep->lock);
- list_add_tail(&info->list, &ep->rma_info.vma_list);
- spin_unlock(&ep->lock);
-done:
- return err;
-}
-
-/* Delete the VMA from the per endpoint VMA list */
-static void scif_delete_vma(struct scif_endpt *ep, struct vm_area_struct *vma)
-{
- struct list_head *item;
- struct scif_vma_info *info;
-
- spin_lock(&ep->lock);
- list_for_each(item, &ep->rma_info.vma_list) {
- info = list_entry(item, struct scif_vma_info, list);
- if (info->vma == vma) {
- list_del(&info->list);
- kfree(info);
- break;
- }
- }
- spin_unlock(&ep->lock);
-}
-
-static phys_addr_t scif_get_phys(phys_addr_t phys, struct scif_endpt *ep)
-{
- struct scif_dev *scifdev = (struct scif_dev *)ep->remote_dev;
- struct scif_hw_dev *sdev = scifdev->sdev;
- phys_addr_t out_phys, apt_base = 0;
-
- /*
- * If the DMA address is card relative then we need to add the
- * aperture base for mmap to work correctly
- */
- if (!scifdev_self(scifdev) && sdev->aper && sdev->card_rel_da)
- apt_base = sdev->aper->pa;
- out_phys = apt_base + phys;
- return out_phys;
-}
-
-int scif_get_pages(scif_epd_t epd, off_t offset, size_t len,
- struct scif_range **pages)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- struct scif_rma_req req;
- struct scif_window *window = NULL;
- int nr_pages, err, i;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI get_pinned_pages: ep %p offset 0x%lx len 0x%lx\n",
- ep, offset, len);
- err = scif_verify_epd(ep);
- if (err)
- return err;
-
- if (!len || (offset < 0) ||
- (offset + len < offset) ||
- (ALIGN(offset, PAGE_SIZE) != offset) ||
- (ALIGN(len, PAGE_SIZE) != len))
- return -EINVAL;
-
- nr_pages = len >> PAGE_SHIFT;
-
- req.out_window = &window;
- req.offset = offset;
- req.prot = 0;
- req.nr_bytes = len;
- req.type = SCIF_WINDOW_SINGLE;
- req.head = &ep->rma_info.remote_reg_list;
-
- mutex_lock(&ep->rma_info.rma_lock);
- /* Does a valid window exist? */
- err = scif_query_window(&req);
- if (err) {
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %d\n", __func__, __LINE__, err);
- goto error;
- }
-
- /* Allocate scif_range */
- *pages = kzalloc(sizeof(**pages), GFP_KERNEL);
- if (!*pages) {
- err = -ENOMEM;
- goto error;
- }
-
- /* Allocate phys addr array */
- (*pages)->phys_addr = scif_zalloc(nr_pages * sizeof(dma_addr_t));
- if (!((*pages)->phys_addr)) {
- err = -ENOMEM;
- goto error;
- }
-
- if (scif_is_mgmt_node() && !scifdev_self(ep->remote_dev)) {
- /* Allocate virtual address array */
- ((*pages)->va = scif_zalloc(nr_pages * sizeof(void *)));
- if (!(*pages)->va) {
- err = -ENOMEM;
- goto error;
- }
- }
- /* Populate the values */
- (*pages)->cookie = window;
- (*pages)->nr_pages = nr_pages;
- (*pages)->prot_flags = window->prot;
-
- for (i = 0; i < nr_pages; i++) {
- (*pages)->phys_addr[i] =
- __scif_off_to_dma_addr(window, offset +
- (i * PAGE_SIZE));
- (*pages)->phys_addr[i] = scif_get_phys((*pages)->phys_addr[i],
- ep);
- if (scif_is_mgmt_node() && !scifdev_self(ep->remote_dev))
- (*pages)->va[i] =
- ep->remote_dev->sdev->aper->va +
- (*pages)->phys_addr[i] -
- ep->remote_dev->sdev->aper->pa;
- }
-
- scif_get_window(window, nr_pages);
-error:
- mutex_unlock(&ep->rma_info.rma_lock);
- if (err) {
- if (*pages) {
- scif_free((*pages)->phys_addr,
- nr_pages * sizeof(dma_addr_t));
- scif_free((*pages)->va,
- nr_pages * sizeof(void *));
- kfree(*pages);
- *pages = NULL;
- }
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %d\n", __func__, __LINE__, err);
- }
- return err;
-}
-EXPORT_SYMBOL_GPL(scif_get_pages);
-
-int scif_put_pages(struct scif_range *pages)
-{
- struct scif_endpt *ep;
- struct scif_window *window;
- struct scifmsg msg;
-
- if (!pages || !pages->cookie)
- return -EINVAL;
-
- window = pages->cookie;
-
- if (!window || window->magic != SCIFEP_MAGIC)
- return -EINVAL;
-
- ep = (struct scif_endpt *)window->ep;
- /*
- * If the state is SCIFEP_CONNECTED or SCIFEP_DISCONNECTED then the
- * callee should be allowed to release references to the pages,
- * else the endpoint was not connected in the first place,
- * hence the ENOTCONN.
- */
- if (ep->state != SCIFEP_CONNECTED && ep->state != SCIFEP_DISCONNECTED)
- return -ENOTCONN;
-
- mutex_lock(&ep->rma_info.rma_lock);
-
- scif_put_window(window, pages->nr_pages);
-
- /* Initiate window destruction if ref count is zero */
- if (!window->ref_count) {
- list_del(&window->list);
- mutex_unlock(&ep->rma_info.rma_lock);
- scif_drain_dma_intr(ep->remote_dev->sdev,
- ep->rma_info.dma_chan);
- /* Inform the peer about this window being destroyed. */
- msg.uop = SCIF_MUNMAP;
- msg.src = ep->port;
- msg.payload[0] = window->peer_window;
- /* No error handling for notification messages */
- scif_nodeqp_send(ep->remote_dev, &msg);
- /* Destroy this window from the peer's registered AS */
- scif_destroy_remote_window(window);
- } else {
- mutex_unlock(&ep->rma_info.rma_lock);
- }
-
- scif_free(pages->phys_addr, pages->nr_pages * sizeof(dma_addr_t));
- scif_free(pages->va, pages->nr_pages * sizeof(void *));
- kfree(pages);
- return 0;
-}
-EXPORT_SYMBOL_GPL(scif_put_pages);
-
-/*
- * scif_rma_list_mmap:
- *
- * Traverse the remote registration list starting from start_window:
- * 1) Create VtoP mappings via remap_pfn_range(..)
- * 2) Once step 1) and 2) complete successfully then traverse the range of
- * windows again and bump the reference count.
- * RMA lock must be held.
- */
-static int scif_rma_list_mmap(struct scif_window *start_window, s64 offset,
- int nr_pages, struct vm_area_struct *vma)
-{
- s64 end_offset, loop_offset = offset;
- struct scif_window *window = start_window;
- int loop_nr_pages, nr_pages_left = nr_pages;
- struct scif_endpt *ep = (struct scif_endpt *)start_window->ep;
- struct list_head *head = &ep->rma_info.remote_reg_list;
- int i, err = 0;
- dma_addr_t phys_addr;
- struct scif_window_iter src_win_iter;
- size_t contig_bytes = 0;
-
- might_sleep();
- list_for_each_entry_from(window, head, list) {
- end_offset = window->offset +
- (window->nr_pages << PAGE_SHIFT);
- loop_nr_pages = min_t(int,
- (end_offset - loop_offset) >> PAGE_SHIFT,
- nr_pages_left);
- scif_init_window_iter(window, &src_win_iter);
- for (i = 0; i < loop_nr_pages; i++) {
- phys_addr = scif_off_to_dma_addr(window, loop_offset,
- &contig_bytes,
- &src_win_iter);
- phys_addr = scif_get_phys(phys_addr, ep);
- err = remap_pfn_range(vma,
- vma->vm_start +
- loop_offset - offset,
- phys_addr >> PAGE_SHIFT,
- PAGE_SIZE,
- vma->vm_page_prot);
- if (err)
- goto error;
- loop_offset += PAGE_SIZE;
- }
- nr_pages_left -= loop_nr_pages;
- if (!nr_pages_left)
- break;
- }
- /*
- * No more failures expected. Bump up the ref count for all
- * the windows. Another traversal from start_window required
- * for handling errors encountered across windows during
- * remap_pfn_range(..).
- */
- loop_offset = offset;
- nr_pages_left = nr_pages;
- window = start_window;
- head = &ep->rma_info.remote_reg_list;
- list_for_each_entry_from(window, head, list) {
- end_offset = window->offset +
- (window->nr_pages << PAGE_SHIFT);
- loop_nr_pages = min_t(int,
- (end_offset - loop_offset) >> PAGE_SHIFT,
- nr_pages_left);
- scif_get_window(window, loop_nr_pages);
- nr_pages_left -= loop_nr_pages;
- loop_offset += (loop_nr_pages << PAGE_SHIFT);
- if (!nr_pages_left)
- break;
- }
-error:
- if (err)
- dev_err(scif_info.mdev.this_device,
- "%s %d err %d\n", __func__, __LINE__, err);
- return err;
-}
-
-/*
- * scif_rma_list_munmap:
- *
- * Traverse the remote registration list starting from window:
- * 1) Decrement ref count.
- * 2) If the ref count drops to zero then send a SCIF_MUNMAP message to peer.
- * RMA lock must be held.
- */
-static void scif_rma_list_munmap(struct scif_window *start_window,
- s64 offset, int nr_pages)
-{
- struct scifmsg msg;
- s64 loop_offset = offset, end_offset;
- int loop_nr_pages, nr_pages_left = nr_pages;
- struct scif_endpt *ep = (struct scif_endpt *)start_window->ep;
- struct list_head *head = &ep->rma_info.remote_reg_list;
- struct scif_window *window = start_window, *_window;
-
- msg.uop = SCIF_MUNMAP;
- msg.src = ep->port;
- loop_offset = offset;
- nr_pages_left = nr_pages;
- list_for_each_entry_safe_from(window, _window, head, list) {
- end_offset = window->offset +
- (window->nr_pages << PAGE_SHIFT);
- loop_nr_pages = min_t(int,
- (end_offset - loop_offset) >> PAGE_SHIFT,
- nr_pages_left);
- scif_put_window(window, loop_nr_pages);
- if (!window->ref_count) {
- struct scif_dev *rdev = ep->remote_dev;
-
- scif_drain_dma_intr(rdev->sdev,
- ep->rma_info.dma_chan);
- /* Inform the peer about this munmap */
- msg.payload[0] = window->peer_window;
- /* No error handling for Notification messages. */
- scif_nodeqp_send(ep->remote_dev, &msg);
- list_del(&window->list);
- /* Destroy this window from the peer's registered AS */
- scif_destroy_remote_window(window);
- }
- nr_pages_left -= loop_nr_pages;
- loop_offset += (loop_nr_pages << PAGE_SHIFT);
- if (!nr_pages_left)
- break;
- }
-}
-
-/*
- * The private data field of each VMA used to mmap a remote window
- * points to an instance of struct vma_pvt
- */
-struct vma_pvt {
- struct scif_endpt *ep; /* End point for remote window */
- s64 offset; /* offset within remote window */
- bool valid_offset; /* offset is valid only if the original
- * mmap request was for a single page
- * else the offset within the vma is
- * the correct offset
- */
- struct kref ref;
-};
-
-static void vma_pvt_release(struct kref *ref)
-{
- struct vma_pvt *vmapvt = container_of(ref, struct vma_pvt, ref);
-
- kfree(vmapvt);
-}
-
-/**
- * scif_vma_open - VMA open driver callback
- * @vma: VMM memory area.
- * The open method is called by the kernel to allow the subsystem implementing
- * the VMA to initialize the area. This method is invoked any time a new
- * reference to the VMA is made (when a process forks, for example).
- * The one exception happens when the VMA is first created by mmap;
- * in this case, the driver's mmap method is called instead.
- * This function is also invoked when an existing VMA is split by the kernel
- * due to a call to munmap on a subset of the VMA resulting in two VMAs.
- * The kernel invokes this function only on one of the two VMAs.
- */
-static void scif_vma_open(struct vm_area_struct *vma)
-{
- struct vma_pvt *vmapvt = vma->vm_private_data;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI vma open: vma_start 0x%lx vma_end 0x%lx\n",
- vma->vm_start, vma->vm_end);
- scif_insert_vma(vmapvt->ep, vma);
- kref_get(&vmapvt->ref);
-}
-
-/**
- * scif_munmap - VMA close driver callback.
- * @vma: VMM memory area.
- * When an area is destroyed, the kernel calls its close operation.
- * Note that there's no usage count associated with VMA's; the area
- * is opened and closed exactly once by each process that uses it.
- */
-static void scif_munmap(struct vm_area_struct *vma)
-{
- struct scif_endpt *ep;
- struct vma_pvt *vmapvt = vma->vm_private_data;
- int nr_pages = vma_pages(vma);
- s64 offset;
- struct scif_rma_req req;
- struct scif_window *window = NULL;
- int err;
-
- might_sleep();
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI munmap: vma_start 0x%lx vma_end 0x%lx\n",
- vma->vm_start, vma->vm_end);
- ep = vmapvt->ep;
- offset = vmapvt->valid_offset ? vmapvt->offset :
- (vma->vm_pgoff) << PAGE_SHIFT;
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI munmap: ep %p nr_pages 0x%x offset 0x%llx\n",
- ep, nr_pages, offset);
- req.out_window = &window;
- req.offset = offset;
- req.nr_bytes = vma->vm_end - vma->vm_start;
- req.prot = vma->vm_flags & (VM_READ | VM_WRITE);
- req.type = SCIF_WINDOW_PARTIAL;
- req.head = &ep->rma_info.remote_reg_list;
-
- mutex_lock(&ep->rma_info.rma_lock);
-
- err = scif_query_window(&req);
- if (err)
- dev_err(scif_info.mdev.this_device,
- "%s %d err %d\n", __func__, __LINE__, err);
- else
- scif_rma_list_munmap(window, offset, nr_pages);
-
- mutex_unlock(&ep->rma_info.rma_lock);
- /*
- * The kernel probably zeroes these out but we still want
- * to clean up our own mess just in case.
- */
- vma->vm_ops = NULL;
- vma->vm_private_data = NULL;
- kref_put(&vmapvt->ref, vma_pvt_release);
- scif_delete_vma(ep, vma);
-}
-
-static const struct vm_operations_struct scif_vm_ops = {
- .open = scif_vma_open,
- .close = scif_munmap,
-};
-
-/**
- * scif_mmap - Map pages in virtual address space to a remote window.
- * @vma: VMM memory area.
- * @epd: endpoint descriptor
- *
- * Return: Upon successful completion, scif_mmap() returns zero
- * else an apt error is returned as documented in scif.h
- */
-int scif_mmap(struct vm_area_struct *vma, scif_epd_t epd)
-{
- struct scif_rma_req req;
- struct scif_window *window = NULL;
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- s64 start_offset = vma->vm_pgoff << PAGE_SHIFT;
- int nr_pages = vma_pages(vma);
- int err;
- struct vma_pvt *vmapvt;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI mmap: ep %p start_offset 0x%llx nr_pages 0x%x\n",
- ep, start_offset, nr_pages);
- err = scif_verify_epd(ep);
- if (err)
- return err;
-
- might_sleep();
-
- err = scif_insert_vma(ep, vma);
- if (err)
- return err;
-
- vmapvt = kzalloc(sizeof(*vmapvt), GFP_KERNEL);
- if (!vmapvt) {
- scif_delete_vma(ep, vma);
- return -ENOMEM;
- }
-
- vmapvt->ep = ep;
- kref_init(&vmapvt->ref);
-
- req.out_window = &window;
- req.offset = start_offset;
- req.nr_bytes = vma->vm_end - vma->vm_start;
- req.prot = vma->vm_flags & (VM_READ | VM_WRITE);
- req.type = SCIF_WINDOW_PARTIAL;
- req.head = &ep->rma_info.remote_reg_list;
-
- mutex_lock(&ep->rma_info.rma_lock);
- /* Does a valid window exist? */
- err = scif_query_window(&req);
- if (err) {
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %d\n", __func__, __LINE__, err);
- goto error_unlock;
- }
-
- /* Default prot for loopback */
- if (!scifdev_self(ep->remote_dev))
- vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
-
- /*
- * VM_DONTCOPY - Do not copy this vma on fork
- * VM_DONTEXPAND - Cannot expand with mremap()
- * VM_RESERVED - Count as reserved_vm like IO
- * VM_PFNMAP - Page-ranges managed without "struct page"
- * VM_IO - Memory mapped I/O or similar
- *
- * We do not want to copy this VMA automatically on a fork(),
- * expand this VMA due to mremap() or swap out these pages since
- * the VMA is actually backed by physical pages in the remote
- * node's physical memory and not via a struct page.
- */
- vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND | VM_DONTDUMP;
-
- if (!scifdev_self(ep->remote_dev))
- vma->vm_flags |= VM_IO | VM_PFNMAP;
-
- /* Map this range of windows */
- err = scif_rma_list_mmap(window, start_offset, nr_pages, vma);
- if (err) {
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %d\n", __func__, __LINE__, err);
- goto error_unlock;
- }
- /* Set up the driver call back */
- vma->vm_ops = &scif_vm_ops;
- vma->vm_private_data = vmapvt;
-error_unlock:
- mutex_unlock(&ep->rma_info.rma_lock);
- if (err) {
- kfree(vmapvt);
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %d\n", __func__, __LINE__, err);
- scif_delete_vma(ep, vma);
- }
- return err;
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#include "scif_peer_bus.h"
-
-#include "scif_main.h"
-#include "scif_map.h"
-
-/**
- * scif_invalidate_ep() - Set state for all connected endpoints
- * to disconnected and wake up all send/recv waitqueues
- *
- * @node: Node to invalidate
- */
-static void scif_invalidate_ep(int node)
-{
- struct scif_endpt *ep;
- struct list_head *pos, *tmpq;
-
- flush_work(&scif_info.conn_work);
- mutex_lock(&scif_info.connlock);
- list_for_each_safe(pos, tmpq, &scif_info.disconnected) {
- ep = list_entry(pos, struct scif_endpt, list);
- if (ep->remote_dev->node == node) {
- scif_unmap_all_windows(ep);
- spin_lock(&ep->lock);
- scif_cleanup_ep_qp(ep);
- spin_unlock(&ep->lock);
- }
- }
- list_for_each_safe(pos, tmpq, &scif_info.connected) {
- ep = list_entry(pos, struct scif_endpt, list);
- if (ep->remote_dev->node == node) {
- list_del(pos);
- spin_lock(&ep->lock);
- ep->state = SCIFEP_DISCONNECTED;
- list_add_tail(&ep->list, &scif_info.disconnected);
- scif_cleanup_ep_qp(ep);
- wake_up_interruptible(&ep->sendwq);
- wake_up_interruptible(&ep->recvwq);
- spin_unlock(&ep->lock);
- scif_unmap_all_windows(ep);
- }
- }
- mutex_unlock(&scif_info.connlock);
-}
-
-void scif_free_qp(struct scif_dev *scifdev)
-{
- struct scif_qp *qp = scifdev->qpairs;
-
- if (!qp)
- return;
- scif_unmap_single(qp->local_buf, scifdev, qp->inbound_q.size);
- kfree(qp->inbound_q.rb_base);
- scif_unmap_single(qp->local_qp, scifdev, sizeof(struct scif_qp));
- kfree(scifdev->qpairs);
- scifdev->qpairs = NULL;
-}
-
-static void scif_cleanup_qp(struct scif_dev *dev)
-{
- struct scif_qp *qp = &dev->qpairs[0];
-
- if (!qp)
- return;
- scif_iounmap((void *)qp->remote_qp, sizeof(struct scif_qp), dev);
- scif_iounmap((void *)qp->outbound_q.rb_base,
- sizeof(struct scif_qp), dev);
- qp->remote_qp = NULL;
- qp->local_write = 0;
- qp->inbound_q.current_write_offset = 0;
- qp->inbound_q.current_read_offset = 0;
- if (scifdev_is_p2p(dev))
- scif_free_qp(dev);
-}
-
-void scif_send_acks(struct scif_dev *dev)
-{
- struct scifmsg msg;
-
- if (dev->node_remove_ack_pending) {
- msg.uop = SCIF_NODE_REMOVE_ACK;
- msg.src.node = scif_info.nodeid;
- msg.dst.node = SCIF_MGMT_NODE;
- msg.payload[0] = dev->node;
- scif_nodeqp_send(&scif_dev[SCIF_MGMT_NODE], &msg);
- dev->node_remove_ack_pending = false;
- }
- if (dev->exit_ack_pending) {
- msg.uop = SCIF_EXIT_ACK;
- msg.src.node = scif_info.nodeid;
- msg.dst.node = dev->node;
- scif_nodeqp_send(dev, &msg);
- dev->exit_ack_pending = false;
- }
-}
-
-/**
- * scif_cleanup_scifdev - Uninitialize SCIF data structures for remote
- * SCIF device.
- * @dev: Remote SCIF device.
- */
-void scif_cleanup_scifdev(struct scif_dev *dev)
-{
- struct scif_hw_dev *sdev = dev->sdev;
-
- if (!dev->sdev)
- return;
- if (scifdev_is_p2p(dev)) {
- if (dev->cookie) {
- sdev->hw_ops->free_irq(sdev, dev->cookie, dev);
- dev->cookie = NULL;
- }
- scif_destroy_intr_wq(dev);
- }
- flush_work(&scif_info.misc_work);
- scif_destroy_p2p(dev);
- scif_invalidate_ep(dev->node);
- scif_zap_mmaps(dev->node);
- scif_cleanup_rma_for_zombies(dev->node);
- flush_work(&scif_info.misc_work);
- scif_send_acks(dev);
- if (!dev->node && scif_info.card_initiated_exit) {
- /*
- * Send an SCIF_EXIT message which is the last message from MIC
- * to the Host and wait for a SCIF_EXIT_ACK
- */
- scif_send_exit(dev);
- scif_info.card_initiated_exit = false;
- }
- scif_cleanup_qp(dev);
-}
-
-/**
- * scif_remove_node
- *
- * @node: Node to remove
- */
-void scif_handle_remove_node(int node)
-{
- struct scif_dev *scifdev = &scif_dev[node];
-
- if (scif_peer_unregister_device(scifdev))
- scif_send_acks(scifdev);
-}
-
-static int scif_send_rmnode_msg(int node, int remove_node)
-{
- struct scifmsg notif_msg;
- struct scif_dev *dev = &scif_dev[node];
-
- notif_msg.uop = SCIF_NODE_REMOVE;
- notif_msg.src.node = scif_info.nodeid;
- notif_msg.dst.node = node;
- notif_msg.payload[0] = remove_node;
- return scif_nodeqp_send(dev, ¬if_msg);
-}
-
-/**
- * scif_node_disconnect
- *
- * @node_id: source node id [in]
- * @mgmt_initiated: Disconnection initiated from the mgmt node
- *
- * Disconnect a node from the scif network.
- */
-void scif_disconnect_node(u32 node_id, bool mgmt_initiated)
-{
- int ret;
- int msg_cnt = 0;
- u32 i = 0;
- struct scif_dev *scifdev = &scif_dev[node_id];
-
- if (!node_id)
- return;
-
- atomic_set(&scifdev->disconn_rescnt, 0);
-
- /* Destroy p2p network */
- for (i = 1; i <= scif_info.maxid; i++) {
- if (i == node_id)
- continue;
- ret = scif_send_rmnode_msg(i, node_id);
- if (!ret)
- msg_cnt++;
- }
- /* Wait for the remote nodes to respond with SCIF_NODE_REMOVE_ACK */
- ret = wait_event_timeout(scifdev->disconn_wq,
- (atomic_read(&scifdev->disconn_rescnt)
- == msg_cnt), SCIF_NODE_ALIVE_TIMEOUT);
- /* Tell the card to clean up */
- if (mgmt_initiated && _scifdev_alive(scifdev))
- /*
- * Send an SCIF_EXIT message which is the last message from Host
- * to the MIC and wait for a SCIF_EXIT_ACK
- */
- scif_send_exit(scifdev);
- atomic_set(&scifdev->disconn_rescnt, 0);
- /* Tell the mgmt node to clean up */
- ret = scif_send_rmnode_msg(SCIF_MGMT_NODE, node_id);
- if (!ret)
- /* Wait for mgmt node to respond with SCIF_NODE_REMOVE_ACK */
- wait_event_timeout(scifdev->disconn_wq,
- (atomic_read(&scifdev->disconn_rescnt) == 1),
- SCIF_NODE_ALIVE_TIMEOUT);
-}
-
-void scif_get_node_info(void)
-{
- struct scifmsg msg;
- DECLARE_COMPLETION_ONSTACK(node_info);
-
- msg.uop = SCIF_GET_NODE_INFO;
- msg.src.node = scif_info.nodeid;
- msg.dst.node = SCIF_MGMT_NODE;
- msg.payload[3] = (u64)&node_info;
-
- if ((scif_nodeqp_send(&scif_dev[SCIF_MGMT_NODE], &msg)))
- return;
-
- /* Wait for a response with SCIF_GET_NODE_INFO */
- wait_for_completion(&node_info);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#include "../bus/scif_bus.h"
-#include "scif_peer_bus.h"
-#include "scif_main.h"
-#include "scif_nodeqp.h"
-#include "scif_map.h"
-
-/*
- ************************************************************************
- * SCIF node Queue Pair (QP) setup flow:
- *
- * 1) SCIF driver gets probed with a scif_hw_dev via the scif_hw_bus
- * 2) scif_setup_qp(..) allocates the local qp and calls
- * scif_setup_qp_connect(..) which allocates and maps the local
- * buffer for the inbound QP
- * 3) The local node updates the device page with the DMA address of the QP
- * 4) A delayed work is scheduled (qp_dwork) which periodically reads if
- * the peer node has updated its QP DMA address
- * 5) Once a valid non zero address is found in the QP DMA address field
- * in the device page, the local node maps the remote node's QP,
- * updates its outbound QP and sends a SCIF_INIT message to the peer
- * 6) The SCIF_INIT message is received by the peer node QP interrupt bottom
- * half handler by calling scif_init(..)
- * 7) scif_init(..) registers a new SCIF peer node by calling
- * scif_peer_register_device(..) which signifies the addition of a new
- * SCIF node
- * 8) On the mgmt node, P2P network setup/teardown is initiated if all the
- * remote nodes are online via scif_p2p_setup(..)
- * 9) For P2P setup, the host maps the remote nodes' aperture and memory
- * bars and sends a SCIF_NODE_ADD message to both nodes
- * 10) As part of scif_nodeadd, both nodes set up their local inbound
- * QPs and send a SCIF_NODE_ADD_ACK to the mgmt node
- * 11) As part of scif_node_add_ack(..) the mgmt node forwards the
- * SCIF_NODE_ADD_ACK to the remote nodes
- * 12) As part of scif_node_add_ack(..) the remote nodes update their
- * outbound QPs, make sure they can access memory on the remote node
- * and then add a new SCIF peer node by calling
- * scif_peer_register_device(..) which signifies the addition of a new
- * SCIF node.
- * 13) The SCIF network is now established across all nodes.
- *
- ************************************************************************
- * SCIF node QP teardown flow (initiated by non mgmt node):
- *
- * 1) SCIF driver gets a remove callback with a scif_hw_dev via the scif_hw_bus
- * 2) The device page QP DMA address field is updated with 0x0
- * 3) A non mgmt node now cleans up all local data structures and sends a
- * SCIF_EXIT message to the peer and waits for a SCIF_EXIT_ACK
- * 4) As part of scif_exit(..) handling scif_disconnect_node(..) is called
- * 5) scif_disconnect_node(..) sends a SCIF_NODE_REMOVE message to all the
- * peers and waits for a SCIF_NODE_REMOVE_ACK
- * 6) As part of scif_node_remove(..) a remote node unregisters the peer
- * node from the SCIF network and sends a SCIF_NODE_REMOVE_ACK
- * 7) When the mgmt node has received all the SCIF_NODE_REMOVE_ACKs
- * it sends itself a node remove message whose handling cleans up local
- * data structures and unregisters the peer node from the SCIF network
- * 8) The mgmt node sends a SCIF_EXIT_ACK
- * 9) Upon receipt of the SCIF_EXIT_ACK the node initiating the teardown
- * completes the SCIF remove routine
- * 10) The SCIF network is now torn down for the node initiating the
- * teardown sequence
- *
- ************************************************************************
- * SCIF node QP teardown flow (initiated by mgmt node):
- *
- * 1) SCIF driver gets a remove callback with a scif_hw_dev via the scif_hw_bus
- * 2) The device page QP DMA address field is updated with 0x0
- * 3) The mgmt node calls scif_disconnect_node(..)
- * 4) scif_disconnect_node(..) sends a SCIF_NODE_REMOVE message to all the peers
- * and waits for a SCIF_NODE_REMOVE_ACK
- * 5) As part of scif_node_remove(..) a remote node unregisters the peer
- * node from the SCIF network and sends a SCIF_NODE_REMOVE_ACK
- * 6) When the mgmt node has received all the SCIF_NODE_REMOVE_ACKs
- * it unregisters the peer node from the SCIF network
- * 7) The mgmt node sends a SCIF_EXIT message and waits for a SCIF_EXIT_ACK.
- * 8) A non mgmt node upon receipt of a SCIF_EXIT message calls scif_stop(..)
- * which would clean up local data structures for all SCIF nodes and
- * then send a SCIF_EXIT_ACK back to the mgmt node
- * 9) Upon receipt of the SCIF_EXIT_ACK the the mgmt node sends itself a node
- * remove message whose handling cleans up local data structures and
- * destroys any P2P mappings.
- * 10) The SCIF hardware device for which a remove callback was received is now
- * disconnected from the SCIF network.
- */
-/*
- * Initializes "local" data structures for the QP. Allocates the QP
- * ring buffer (rb) and initializes the "in bound" queue.
- */
-int scif_setup_qp_connect(struct scif_qp *qp, dma_addr_t *qp_offset,
- int local_size, struct scif_dev *scifdev)
-{
- void *local_q = qp->inbound_q.rb_base;
- int err = 0;
- u32 tmp_rd = 0;
-
- spin_lock_init(&qp->send_lock);
- spin_lock_init(&qp->recv_lock);
-
- /* Allocate rb only if not already allocated */
- if (!local_q) {
- local_q = kzalloc(local_size, GFP_KERNEL);
- if (!local_q) {
- err = -ENOMEM;
- return err;
- }
- }
-
- err = scif_map_single(&qp->local_buf, local_q, scifdev, local_size);
- if (err)
- goto kfree;
- /*
- * To setup the inbound_q, the buffer lives locally, the read pointer
- * is remote and the write pointer is local.
- */
- scif_rb_init(&qp->inbound_q,
- &tmp_rd,
- &qp->local_write,
- local_q, get_count_order(local_size));
- /*
- * The read pointer is NULL initially and it is unsafe to use the ring
- * buffer til this changes!
- */
- qp->inbound_q.read_ptr = NULL;
- err = scif_map_single(qp_offset, qp,
- scifdev, sizeof(struct scif_qp));
- if (err)
- goto unmap;
- qp->local_qp = *qp_offset;
- return err;
-unmap:
- scif_unmap_single(qp->local_buf, scifdev, local_size);
- qp->local_buf = 0;
-kfree:
- kfree(local_q);
- return err;
-}
-
-/* When the other side has already done it's allocation, this is called */
-int scif_setup_qp_accept(struct scif_qp *qp, dma_addr_t *qp_offset,
- dma_addr_t phys, int local_size,
- struct scif_dev *scifdev)
-{
- void *local_q;
- void *remote_q;
- struct scif_qp *remote_qp;
- int remote_size;
- int err = 0;
-
- spin_lock_init(&qp->send_lock);
- spin_lock_init(&qp->recv_lock);
- /* Start by figuring out where we need to point */
- remote_qp = scif_ioremap(phys, sizeof(struct scif_qp), scifdev);
- if (!remote_qp)
- return -EIO;
- qp->remote_qp = remote_qp;
- if (qp->remote_qp->magic != SCIFEP_MAGIC) {
- err = -EIO;
- goto iounmap;
- }
- qp->remote_buf = remote_qp->local_buf;
- remote_size = qp->remote_qp->inbound_q.size;
- remote_q = scif_ioremap(qp->remote_buf, remote_size, scifdev);
- if (!remote_q) {
- err = -EIO;
- goto iounmap;
- }
- qp->remote_qp->local_write = 0;
- /*
- * To setup the outbound_q, the buffer lives in remote memory,
- * the read pointer is local, the write pointer is remote
- */
- scif_rb_init(&qp->outbound_q,
- &qp->local_read,
- &qp->remote_qp->local_write,
- remote_q,
- get_count_order(remote_size));
- local_q = kzalloc(local_size, GFP_KERNEL);
- if (!local_q) {
- err = -ENOMEM;
- goto iounmap_1;
- }
- err = scif_map_single(&qp->local_buf, local_q, scifdev, local_size);
- if (err)
- goto kfree;
- qp->remote_qp->local_read = 0;
- /*
- * To setup the inbound_q, the buffer lives locally, the read pointer
- * is remote and the write pointer is local
- */
- scif_rb_init(&qp->inbound_q,
- &qp->remote_qp->local_read,
- &qp->local_write,
- local_q, get_count_order(local_size));
- err = scif_map_single(qp_offset, qp, scifdev,
- sizeof(struct scif_qp));
- if (err)
- goto unmap;
- qp->local_qp = *qp_offset;
- return err;
-unmap:
- scif_unmap_single(qp->local_buf, scifdev, local_size);
- qp->local_buf = 0;
-kfree:
- kfree(local_q);
-iounmap_1:
- scif_iounmap(remote_q, remote_size, scifdev);
- qp->outbound_q.rb_base = NULL;
-iounmap:
- scif_iounmap(qp->remote_qp, sizeof(struct scif_qp), scifdev);
- qp->remote_qp = NULL;
- return err;
-}
-
-int scif_setup_qp_connect_response(struct scif_dev *scifdev,
- struct scif_qp *qp, u64 payload)
-{
- int err = 0;
- void *r_buf;
- int remote_size;
- phys_addr_t tmp_phys;
-
- qp->remote_qp = scif_ioremap(payload, sizeof(struct scif_qp), scifdev);
-
- if (!qp->remote_qp) {
- err = -ENOMEM;
- goto error;
- }
-
- if (qp->remote_qp->magic != SCIFEP_MAGIC) {
- dev_err(&scifdev->sdev->dev,
- "SCIFEP_MAGIC mismatch between self %d remote %d\n",
- scif_dev[scif_info.nodeid].node, scifdev->node);
- err = -ENODEV;
- goto error;
- }
-
- tmp_phys = qp->remote_qp->local_buf;
- remote_size = qp->remote_qp->inbound_q.size;
- r_buf = scif_ioremap(tmp_phys, remote_size, scifdev);
-
- if (!r_buf)
- return -EIO;
-
- qp->local_read = 0;
- scif_rb_init(&qp->outbound_q,
- &qp->local_read,
- &qp->remote_qp->local_write,
- r_buf,
- get_count_order(remote_size));
- /*
- * Because the node QP may already be processing an INIT message, set
- * the read pointer so the cached read offset isn't lost
- */
- qp->remote_qp->local_read = qp->inbound_q.current_read_offset;
- /*
- * resetup the inbound_q now that we know where the
- * inbound_read really is.
- */
- scif_rb_init(&qp->inbound_q,
- &qp->remote_qp->local_read,
- &qp->local_write,
- qp->inbound_q.rb_base,
- get_count_order(qp->inbound_q.size));
-error:
- return err;
-}
-
-static __always_inline void
-scif_send_msg_intr(struct scif_dev *scifdev)
-{
- struct scif_hw_dev *sdev = scifdev->sdev;
-
- if (scifdev_is_p2p(scifdev))
- sdev->hw_ops->send_p2p_intr(sdev, scifdev->rdb, &scifdev->mmio);
- else
- sdev->hw_ops->send_intr(sdev, scifdev->rdb);
-}
-
-int scif_qp_response(phys_addr_t phys, struct scif_dev *scifdev)
-{
- int err = 0;
- struct scifmsg msg;
-
- err = scif_setup_qp_connect_response(scifdev, scifdev->qpairs, phys);
- if (!err) {
- /*
- * Now that everything is setup and mapped, we're ready
- * to tell the peer about our queue's location
- */
- msg.uop = SCIF_INIT;
- msg.dst.node = scifdev->node;
- err = scif_nodeqp_send(scifdev, &msg);
- }
- return err;
-}
-
-void scif_send_exit(struct scif_dev *scifdev)
-{
- struct scifmsg msg;
- int ret;
-
- scifdev->exit = OP_IN_PROGRESS;
- msg.uop = SCIF_EXIT;
- msg.src.node = scif_info.nodeid;
- msg.dst.node = scifdev->node;
- ret = scif_nodeqp_send(scifdev, &msg);
- if (ret)
- goto done;
- /* Wait for a SCIF_EXIT_ACK message */
- wait_event_timeout(scif_info.exitwq, scifdev->exit == OP_COMPLETED,
- SCIF_NODE_ALIVE_TIMEOUT);
-done:
- scifdev->exit = OP_IDLE;
-}
-
-int scif_setup_qp(struct scif_dev *scifdev)
-{
- int err = 0;
- int local_size;
- struct scif_qp *qp;
-
- local_size = SCIF_NODE_QP_SIZE;
-
- qp = kzalloc(sizeof(*qp), GFP_KERNEL);
- if (!qp) {
- err = -ENOMEM;
- return err;
- }
- qp->magic = SCIFEP_MAGIC;
- scifdev->qpairs = qp;
- err = scif_setup_qp_connect(qp, &scifdev->qp_dma_addr,
- local_size, scifdev);
- if (err)
- goto free_qp;
- /*
- * We're as setup as we can be. The inbound_q is setup, w/o a usable
- * outbound q. When we get a message, the read_ptr will be updated,
- * and we will pull the message.
- */
- return err;
-free_qp:
- kfree(scifdev->qpairs);
- scifdev->qpairs = NULL;
- return err;
-}
-
-static void scif_p2p_freesg(struct scatterlist *sg)
-{
- kfree(sg);
-}
-
-static struct scatterlist *
-scif_p2p_setsg(phys_addr_t pa, int page_size, int page_cnt)
-{
- struct scatterlist *sg;
- struct page *page;
- int i;
-
- sg = kmalloc_array(page_cnt, sizeof(struct scatterlist), GFP_KERNEL);
- if (!sg)
- return NULL;
- sg_init_table(sg, page_cnt);
- for (i = 0; i < page_cnt; i++) {
- page = pfn_to_page(pa >> PAGE_SHIFT);
- sg_set_page(&sg[i], page, page_size, 0);
- pa += page_size;
- }
- return sg;
-}
-
-/* Init p2p mappings required to access peerdev from scifdev */
-static struct scif_p2p_info *
-scif_init_p2p_info(struct scif_dev *scifdev, struct scif_dev *peerdev)
-{
- struct scif_p2p_info *p2p;
- int num_mmio_pages, num_aper_pages, sg_page_shift, err, num_aper_chunks;
- struct scif_hw_dev *psdev = peerdev->sdev;
- struct scif_hw_dev *sdev = scifdev->sdev;
-
- num_mmio_pages = psdev->mmio->len >> PAGE_SHIFT;
- num_aper_pages = psdev->aper->len >> PAGE_SHIFT;
-
- p2p = kzalloc(sizeof(*p2p), GFP_KERNEL);
- if (!p2p)
- return NULL;
- p2p->ppi_sg[SCIF_PPI_MMIO] = scif_p2p_setsg(psdev->mmio->pa,
- PAGE_SIZE, num_mmio_pages);
- if (!p2p->ppi_sg[SCIF_PPI_MMIO])
- goto free_p2p;
- p2p->sg_nentries[SCIF_PPI_MMIO] = num_mmio_pages;
- sg_page_shift = get_order(min(psdev->aper->len, (u64)(1 << 30)));
- num_aper_chunks = num_aper_pages >> (sg_page_shift - PAGE_SHIFT);
- p2p->ppi_sg[SCIF_PPI_APER] = scif_p2p_setsg(psdev->aper->pa,
- 1 << sg_page_shift,
- num_aper_chunks);
- p2p->sg_nentries[SCIF_PPI_APER] = num_aper_chunks;
- err = dma_map_sg(&sdev->dev, p2p->ppi_sg[SCIF_PPI_MMIO],
- num_mmio_pages, PCI_DMA_BIDIRECTIONAL);
- if (err != num_mmio_pages)
- goto scif_p2p_free;
- err = dma_map_sg(&sdev->dev, p2p->ppi_sg[SCIF_PPI_APER],
- num_aper_chunks, PCI_DMA_BIDIRECTIONAL);
- if (err != num_aper_chunks)
- goto dma_unmap;
- p2p->ppi_da[SCIF_PPI_MMIO] = sg_dma_address(p2p->ppi_sg[SCIF_PPI_MMIO]);
- p2p->ppi_da[SCIF_PPI_APER] = sg_dma_address(p2p->ppi_sg[SCIF_PPI_APER]);
- p2p->ppi_len[SCIF_PPI_MMIO] = num_mmio_pages;
- p2p->ppi_len[SCIF_PPI_APER] = num_aper_pages;
- p2p->ppi_peer_id = peerdev->node;
- return p2p;
-dma_unmap:
- dma_unmap_sg(&sdev->dev, p2p->ppi_sg[SCIF_PPI_MMIO],
- p2p->sg_nentries[SCIF_PPI_MMIO], DMA_BIDIRECTIONAL);
-scif_p2p_free:
- scif_p2p_freesg(p2p->ppi_sg[SCIF_PPI_MMIO]);
- scif_p2p_freesg(p2p->ppi_sg[SCIF_PPI_APER]);
-free_p2p:
- kfree(p2p);
- return NULL;
-}
-
-/* Uninitialize and release resources from a p2p mapping */
-static void scif_deinit_p2p_info(struct scif_dev *scifdev,
- struct scif_p2p_info *p2p)
-{
- struct scif_hw_dev *sdev = scifdev->sdev;
-
- dma_unmap_sg(&sdev->dev, p2p->ppi_sg[SCIF_PPI_MMIO],
- p2p->sg_nentries[SCIF_PPI_MMIO], DMA_BIDIRECTIONAL);
- dma_unmap_sg(&sdev->dev, p2p->ppi_sg[SCIF_PPI_APER],
- p2p->sg_nentries[SCIF_PPI_APER], DMA_BIDIRECTIONAL);
- scif_p2p_freesg(p2p->ppi_sg[SCIF_PPI_MMIO]);
- scif_p2p_freesg(p2p->ppi_sg[SCIF_PPI_APER]);
- kfree(p2p);
-}
-
-/**
- * scif_node_connect: Respond to SCIF_NODE_CONNECT interrupt message
- * @scifdev: SCIF device
- * @dst: Destination node
- *
- * Connect the src and dst node by setting up the p2p connection
- * between them. Management node here acts like a proxy.
- */
-static void scif_node_connect(struct scif_dev *scifdev, int dst)
-{
- struct scif_dev *dev_j = scifdev;
- struct scif_dev *dev_i = NULL;
- struct scif_p2p_info *p2p_ij = NULL; /* bus addr for j from i */
- struct scif_p2p_info *p2p_ji = NULL; /* bus addr for i from j */
- struct scif_p2p_info *p2p;
- struct list_head *pos, *tmp;
- struct scifmsg msg;
- int err;
- u64 tmppayload;
-
- if (dst < 1 || dst > scif_info.maxid)
- return;
-
- dev_i = &scif_dev[dst];
-
- if (!_scifdev_alive(dev_i))
- return;
- /*
- * If the p2p connection is already setup or in the process of setting
- * up then just ignore this request. The requested node will get
- * informed by SCIF_NODE_ADD_ACK or SCIF_NODE_ADD_NACK
- */
- if (!list_empty(&dev_i->p2p)) {
- list_for_each_safe(pos, tmp, &dev_i->p2p) {
- p2p = list_entry(pos, struct scif_p2p_info, ppi_list);
- if (p2p->ppi_peer_id == dev_j->node)
- return;
- }
- }
- p2p_ij = scif_init_p2p_info(dev_i, dev_j);
- if (!p2p_ij)
- return;
- p2p_ji = scif_init_p2p_info(dev_j, dev_i);
- if (!p2p_ji) {
- scif_deinit_p2p_info(dev_i, p2p_ij);
- return;
- }
- list_add_tail(&p2p_ij->ppi_list, &dev_i->p2p);
- list_add_tail(&p2p_ji->ppi_list, &dev_j->p2p);
-
- /*
- * Send a SCIF_NODE_ADD to dev_i, pass it its bus address
- * as seen from dev_j
- */
- msg.uop = SCIF_NODE_ADD;
- msg.src.node = dev_j->node;
- msg.dst.node = dev_i->node;
-
- msg.payload[0] = p2p_ji->ppi_da[SCIF_PPI_APER];
- msg.payload[1] = p2p_ij->ppi_da[SCIF_PPI_MMIO];
- msg.payload[2] = p2p_ij->ppi_da[SCIF_PPI_APER];
- msg.payload[3] = p2p_ij->ppi_len[SCIF_PPI_APER] << PAGE_SHIFT;
-
- err = scif_nodeqp_send(dev_i, &msg);
- if (err) {
- dev_err(&scifdev->sdev->dev,
- "%s %d error %d\n", __func__, __LINE__, err);
- return;
- }
-
- /* Same as above but to dev_j */
- msg.uop = SCIF_NODE_ADD;
- msg.src.node = dev_i->node;
- msg.dst.node = dev_j->node;
-
- tmppayload = msg.payload[0];
- msg.payload[0] = msg.payload[2];
- msg.payload[2] = tmppayload;
- msg.payload[1] = p2p_ji->ppi_da[SCIF_PPI_MMIO];
- msg.payload[3] = p2p_ji->ppi_len[SCIF_PPI_APER] << PAGE_SHIFT;
-
- scif_nodeqp_send(dev_j, &msg);
-}
-
-static void scif_p2p_setup(void)
-{
- int i, j;
-
- if (!scif_info.p2p_enable)
- return;
-
- for (i = 1; i <= scif_info.maxid; i++)
- if (!_scifdev_alive(&scif_dev[i]))
- return;
-
- for (i = 1; i <= scif_info.maxid; i++) {
- for (j = 1; j <= scif_info.maxid; j++) {
- struct scif_dev *scifdev = &scif_dev[i];
-
- if (i == j)
- continue;
- scif_node_connect(scifdev, j);
- }
- }
-}
-
-static char *message_types[] = {"BAD",
- "INIT",
- "EXIT",
- "SCIF_EXIT_ACK",
- "SCIF_NODE_ADD",
- "SCIF_NODE_ADD_ACK",
- "SCIF_NODE_ADD_NACK",
- "REMOVE_NODE",
- "REMOVE_NODE_ACK",
- "CNCT_REQ",
- "CNCT_GNT",
- "CNCT_GNTACK",
- "CNCT_GNTNACK",
- "CNCT_REJ",
- "DISCNCT",
- "DISCNT_ACK",
- "CLIENT_SENT",
- "CLIENT_RCVD",
- "SCIF_GET_NODE_INFO",
- "REGISTER",
- "REGISTER_ACK",
- "REGISTER_NACK",
- "UNREGISTER",
- "UNREGISTER_ACK",
- "UNREGISTER_NACK",
- "ALLOC_REQ",
- "ALLOC_GNT",
- "ALLOC_REJ",
- "FREE_PHYS",
- "FREE_VIRT",
- "MUNMAP",
- "MARK",
- "MARK_ACK",
- "MARK_NACK",
- "WAIT",
- "WAIT_ACK",
- "WAIT_NACK",
- "SIGNAL_LOCAL",
- "SIGNAL_REMOTE",
- "SIG_ACK",
- "SIG_NACK"};
-
-static void
-scif_display_message(struct scif_dev *scifdev, struct scifmsg *msg,
- const char *label)
-{
- if (!scif_info.en_msg_log)
- return;
- if (msg->uop > SCIF_MAX_MSG) {
- dev_err(&scifdev->sdev->dev,
- "%s: unknown msg type %d\n", label, msg->uop);
- return;
- }
- dev_info(&scifdev->sdev->dev,
- "%s: msg type %s, src %d:%d, dest %d:%d payload 0x%llx:0x%llx:0x%llx:0x%llx\n",
- label, message_types[msg->uop], msg->src.node, msg->src.port,
- msg->dst.node, msg->dst.port, msg->payload[0], msg->payload[1],
- msg->payload[2], msg->payload[3]);
-}
-
-int _scif_nodeqp_send(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_qp *qp = scifdev->qpairs;
- int err = -ENOMEM, loop_cnt = 0;
-
- scif_display_message(scifdev, msg, "Sent");
- if (!qp) {
- err = -EINVAL;
- goto error;
- }
- spin_lock(&qp->send_lock);
-
- while ((err = scif_rb_write(&qp->outbound_q,
- msg, sizeof(struct scifmsg)))) {
- mdelay(1);
-#define SCIF_NODEQP_SEND_TO_MSEC (3 * 1000)
- if (loop_cnt++ > (SCIF_NODEQP_SEND_TO_MSEC)) {
- err = -ENODEV;
- break;
- }
- }
- if (!err)
- scif_rb_commit(&qp->outbound_q);
- spin_unlock(&qp->send_lock);
- if (!err) {
- if (scifdev_self(scifdev))
- /*
- * For loopback we need to emulate an interrupt by
- * queuing work for the queue handling real node
- * Qp interrupts.
- */
- queue_work(scifdev->intr_wq, &scifdev->intr_bh);
- else
- scif_send_msg_intr(scifdev);
- }
-error:
- if (err)
- dev_dbg(&scifdev->sdev->dev,
- "%s %d error %d uop %d\n",
- __func__, __LINE__, err, msg->uop);
- return err;
-}
-
-/**
- * scif_nodeqp_send - Send a message on the node queue pair
- * @scifdev: Scif Device.
- * @msg: The message to be sent.
- */
-int scif_nodeqp_send(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- int err;
- struct device *spdev = NULL;
-
- if (msg->uop > SCIF_EXIT_ACK) {
- /* Don't send messages once the exit flow has begun */
- if (OP_IDLE != scifdev->exit)
- return -ENODEV;
- spdev = scif_get_peer_dev(scifdev);
- if (IS_ERR(spdev)) {
- err = PTR_ERR(spdev);
- return err;
- }
- }
- err = _scif_nodeqp_send(scifdev, msg);
- if (msg->uop > SCIF_EXIT_ACK)
- scif_put_peer_dev(spdev);
- return err;
-}
-
-/*
- * scif_misc_handler:
- *
- * Work queue handler for servicing miscellaneous SCIF tasks.
- * Examples include:
- * 1) Remote fence requests.
- * 2) Destruction of temporary registered windows
- * created during scif_vreadfrom()/scif_vwriteto().
- * 3) Cleanup of zombie endpoints.
- */
-void scif_misc_handler(struct work_struct *work)
-{
- scif_rma_handle_remote_fences();
- scif_rma_destroy_windows();
- scif_rma_destroy_tcw_invalid();
- scif_cleanup_zombie_epd();
-}
-
-/**
- * scif_init() - Respond to SCIF_INIT interrupt message
- * @scifdev: Remote SCIF device node
- * @msg: Interrupt message
- */
-static __always_inline void
-scif_init(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- /*
- * Allow the thread waiting for device page updates for the peer QP DMA
- * address to complete initializing the inbound_q.
- */
- flush_delayed_work(&scifdev->qp_dwork);
-
- scif_peer_register_device(scifdev);
-
- if (scif_is_mgmt_node()) {
- mutex_lock(&scif_info.conflock);
- scif_p2p_setup();
- mutex_unlock(&scif_info.conflock);
- }
-}
-
-/**
- * scif_exit() - Respond to SCIF_EXIT interrupt message
- * @scifdev: Remote SCIF device node
- * @unused: Interrupt message (unused)
- *
- * This function stops the SCIF interface for the node which sent
- * the SCIF_EXIT message and starts waiting for that node to
- * resetup the queue pair again.
- */
-static __always_inline void
-scif_exit(struct scif_dev *scifdev, struct scifmsg *unused)
-{
- scifdev->exit_ack_pending = true;
- if (scif_is_mgmt_node())
- scif_disconnect_node(scifdev->node, false);
- else
- scif_stop(scifdev);
- schedule_delayed_work(&scifdev->qp_dwork,
- msecs_to_jiffies(1000));
-}
-
-/**
- * scif_exitack() - Respond to SCIF_EXIT_ACK interrupt message
- * @scifdev: Remote SCIF device node
- * @unused: Interrupt message (unused)
- *
- */
-static __always_inline void
-scif_exit_ack(struct scif_dev *scifdev, struct scifmsg *unused)
-{
- scifdev->exit = OP_COMPLETED;
- wake_up(&scif_info.exitwq);
-}
-
-/**
- * scif_node_add() - Respond to SCIF_NODE_ADD interrupt message
- * @scifdev: Remote SCIF device node
- * @msg: Interrupt message
- *
- * When the mgmt node driver has finished initializing a MIC node queue pair it
- * marks the node as online. It then looks for all currently online MIC cards
- * and send a SCIF_NODE_ADD message to identify the ID of the new card for
- * peer to peer initialization
- *
- * The local node allocates its incoming queue and sends its address in the
- * SCIF_NODE_ADD_ACK message back to the mgmt node, the mgmt node "reflects"
- * this message to the new node
- */
-static __always_inline void
-scif_node_add(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_dev *newdev;
- dma_addr_t qp_offset;
- int qp_connect;
- struct scif_hw_dev *sdev;
-
- dev_dbg(&scifdev->sdev->dev,
- "Scifdev %d:%d received NODE_ADD msg for node %d\n",
- scifdev->node, msg->dst.node, msg->src.node);
- dev_dbg(&scifdev->sdev->dev,
- "Remote address for this node's aperture %llx\n",
- msg->payload[0]);
- newdev = &scif_dev[msg->src.node];
- newdev->node = msg->src.node;
- newdev->sdev = scif_dev[SCIF_MGMT_NODE].sdev;
- sdev = newdev->sdev;
-
- if (scif_setup_intr_wq(newdev)) {
- dev_err(&scifdev->sdev->dev,
- "failed to setup interrupts for %d\n", msg->src.node);
- goto interrupt_setup_error;
- }
- newdev->mmio.va = ioremap(msg->payload[1], sdev->mmio->len);
- if (!newdev->mmio.va) {
- dev_err(&scifdev->sdev->dev,
- "failed to map mmio for %d\n", msg->src.node);
- goto mmio_map_error;
- }
- newdev->qpairs = kzalloc(sizeof(*newdev->qpairs), GFP_KERNEL);
- if (!newdev->qpairs)
- goto qp_alloc_error;
- /*
- * Set the base address of the remote node's memory since it gets
- * added to qp_offset
- */
- newdev->base_addr = msg->payload[0];
-
- qp_connect = scif_setup_qp_connect(newdev->qpairs, &qp_offset,
- SCIF_NODE_QP_SIZE, newdev);
- if (qp_connect) {
- dev_err(&scifdev->sdev->dev,
- "failed to setup qp_connect %d\n", qp_connect);
- goto qp_connect_error;
- }
-
- newdev->db = sdev->hw_ops->next_db(sdev);
- newdev->cookie = sdev->hw_ops->request_irq(sdev, scif_intr_handler,
- "SCIF_INTR", newdev,
- newdev->db);
- if (IS_ERR(newdev->cookie))
- goto qp_connect_error;
- newdev->qpairs->magic = SCIFEP_MAGIC;
- newdev->qpairs->qp_state = SCIF_QP_OFFLINE;
-
- msg->uop = SCIF_NODE_ADD_ACK;
- msg->dst.node = msg->src.node;
- msg->src.node = scif_info.nodeid;
- msg->payload[0] = qp_offset;
- msg->payload[2] = newdev->db;
- scif_nodeqp_send(&scif_dev[SCIF_MGMT_NODE], msg);
- return;
-qp_connect_error:
- kfree(newdev->qpairs);
- newdev->qpairs = NULL;
-qp_alloc_error:
- iounmap(newdev->mmio.va);
- newdev->mmio.va = NULL;
-mmio_map_error:
-interrupt_setup_error:
- dev_err(&scifdev->sdev->dev,
- "node add failed for node %d\n", msg->src.node);
- msg->uop = SCIF_NODE_ADD_NACK;
- msg->dst.node = msg->src.node;
- msg->src.node = scif_info.nodeid;
- scif_nodeqp_send(&scif_dev[SCIF_MGMT_NODE], msg);
-}
-
-void scif_poll_qp_state(struct work_struct *work)
-{
-#define SCIF_NODE_QP_RETRY 100
-#define SCIF_NODE_QP_TIMEOUT 100
- struct scif_dev *peerdev = container_of(work, struct scif_dev,
- p2p_dwork.work);
- struct scif_qp *qp = &peerdev->qpairs[0];
-
- if (qp->qp_state != SCIF_QP_ONLINE ||
- qp->remote_qp->qp_state != SCIF_QP_ONLINE) {
- if (peerdev->p2p_retry++ == SCIF_NODE_QP_RETRY) {
- dev_err(&peerdev->sdev->dev,
- "Warning: QP check timeout with state %d\n",
- qp->qp_state);
- goto timeout;
- }
- schedule_delayed_work(&peerdev->p2p_dwork,
- msecs_to_jiffies(SCIF_NODE_QP_TIMEOUT));
- return;
- }
- return;
-timeout:
- dev_err(&peerdev->sdev->dev,
- "%s %d remote node %d offline, state = 0x%x\n",
- __func__, __LINE__, peerdev->node, qp->qp_state);
- qp->remote_qp->qp_state = SCIF_QP_OFFLINE;
- scif_peer_unregister_device(peerdev);
- scif_cleanup_scifdev(peerdev);
-}
-
-/**
- * scif_node_add_ack() - Respond to SCIF_NODE_ADD_ACK interrupt message
- * @scifdev: Remote SCIF device node
- * @msg: Interrupt message
- *
- * After a MIC node receives the SCIF_NODE_ADD_ACK message it send this
- * message to the mgmt node to confirm the sequence is finished.
- *
- */
-static __always_inline void
-scif_node_add_ack(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_dev *peerdev;
- struct scif_qp *qp;
- struct scif_dev *dst_dev = &scif_dev[msg->dst.node];
-
- dev_dbg(&scifdev->sdev->dev,
- "Scifdev %d received SCIF_NODE_ADD_ACK msg src %d dst %d\n",
- scifdev->node, msg->src.node, msg->dst.node);
- dev_dbg(&scifdev->sdev->dev,
- "payload %llx %llx %llx %llx\n", msg->payload[0],
- msg->payload[1], msg->payload[2], msg->payload[3]);
- if (scif_is_mgmt_node()) {
- /*
- * the lock serializes with scif_qp_response_ack. The mgmt node
- * is forwarding the NODE_ADD_ACK message from src to dst we
- * need to make sure that the dst has already received a
- * NODE_ADD for src and setup its end of the qp to dst
- */
- mutex_lock(&scif_info.conflock);
- msg->payload[1] = scif_info.maxid;
- scif_nodeqp_send(dst_dev, msg);
- mutex_unlock(&scif_info.conflock);
- return;
- }
- peerdev = &scif_dev[msg->src.node];
- peerdev->sdev = scif_dev[SCIF_MGMT_NODE].sdev;
- peerdev->node = msg->src.node;
-
- qp = &peerdev->qpairs[0];
-
- if ((scif_setup_qp_connect_response(peerdev, &peerdev->qpairs[0],
- msg->payload[0])))
- goto local_error;
- peerdev->rdb = msg->payload[2];
- qp->remote_qp->qp_state = SCIF_QP_ONLINE;
-
- scif_peer_register_device(peerdev);
-
- schedule_delayed_work(&peerdev->p2p_dwork, 0);
- return;
-local_error:
- scif_cleanup_scifdev(peerdev);
-}
-
-/**
- * scif_node_add_nack: Respond to SCIF_NODE_ADD_NACK interrupt message
- * @scifdev: Remote SCIF device node
- * @msg: Interrupt message
- *
- * SCIF_NODE_ADD failed, so inform the waiting wq.
- */
-static __always_inline void
-scif_node_add_nack(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- if (scif_is_mgmt_node()) {
- struct scif_dev *dst_dev = &scif_dev[msg->dst.node];
-
- dev_dbg(&scifdev->sdev->dev,
- "SCIF_NODE_ADD_NACK received from %d\n", scifdev->node);
- scif_nodeqp_send(dst_dev, msg);
- }
-}
-
-/**
- * scif_node_remove: Handle SCIF_NODE_REMOVE message
- * @scifdev: Remote SCIF device node
- * @msg: Interrupt message
- *
- * Handle node removal.
- */
-static __always_inline void
-scif_node_remove(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- int node = msg->payload[0];
- struct scif_dev *scdev = &scif_dev[node];
-
- scdev->node_remove_ack_pending = true;
- scif_handle_remove_node(node);
-}
-
-/**
- * scif_node_remove_ack: Handle SCIF_NODE_REMOVE_ACK message
- * @scifdev: Remote SCIF device node
- * @msg: Interrupt message
- *
- * The peer has acked a SCIF_NODE_REMOVE message.
- */
-static __always_inline void
-scif_node_remove_ack(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_dev *sdev = &scif_dev[msg->payload[0]];
-
- atomic_inc(&sdev->disconn_rescnt);
- wake_up(&sdev->disconn_wq);
-}
-
-/**
- * scif_get_node_info: Respond to SCIF_GET_NODE_INFO interrupt message
- * @scifdev: Remote SCIF device node
- * @msg: Interrupt message
- *
- * Retrieve node info i.e maxid and total from the mgmt node.
- */
-static __always_inline void
-scif_get_node_info_resp(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- if (scif_is_mgmt_node()) {
- swap(msg->dst.node, msg->src.node);
- mutex_lock(&scif_info.conflock);
- msg->payload[1] = scif_info.maxid;
- msg->payload[2] = scif_info.total;
- mutex_unlock(&scif_info.conflock);
- scif_nodeqp_send(scifdev, msg);
- } else {
- struct completion *node_info =
- (struct completion *)msg->payload[3];
-
- mutex_lock(&scif_info.conflock);
- scif_info.maxid = msg->payload[1];
- scif_info.total = msg->payload[2];
- complete_all(node_info);
- mutex_unlock(&scif_info.conflock);
- }
-}
-
-static void
-scif_msg_unknown(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- /* Bogus Node Qp Message? */
- dev_err(&scifdev->sdev->dev,
- "Unknown message 0x%xn scifdev->node 0x%x\n",
- msg->uop, scifdev->node);
-}
-
-static void (*scif_intr_func[SCIF_MAX_MSG + 1])
- (struct scif_dev *, struct scifmsg *msg) = {
- scif_msg_unknown, /* Error */
- scif_init, /* SCIF_INIT */
- scif_exit, /* SCIF_EXIT */
- scif_exit_ack, /* SCIF_EXIT_ACK */
- scif_node_add, /* SCIF_NODE_ADD */
- scif_node_add_ack, /* SCIF_NODE_ADD_ACK */
- scif_node_add_nack, /* SCIF_NODE_ADD_NACK */
- scif_node_remove, /* SCIF_NODE_REMOVE */
- scif_node_remove_ack, /* SCIF_NODE_REMOVE_ACK */
- scif_cnctreq, /* SCIF_CNCT_REQ */
- scif_cnctgnt, /* SCIF_CNCT_GNT */
- scif_cnctgnt_ack, /* SCIF_CNCT_GNTACK */
- scif_cnctgnt_nack, /* SCIF_CNCT_GNTNACK */
- scif_cnctrej, /* SCIF_CNCT_REJ */
- scif_discnct, /* SCIF_DISCNCT */
- scif_discnt_ack, /* SCIF_DISCNT_ACK */
- scif_clientsend, /* SCIF_CLIENT_SENT */
- scif_clientrcvd, /* SCIF_CLIENT_RCVD */
- scif_get_node_info_resp,/* SCIF_GET_NODE_INFO */
- scif_recv_reg, /* SCIF_REGISTER */
- scif_recv_reg_ack, /* SCIF_REGISTER_ACK */
- scif_recv_reg_nack, /* SCIF_REGISTER_NACK */
- scif_recv_unreg, /* SCIF_UNREGISTER */
- scif_recv_unreg_ack, /* SCIF_UNREGISTER_ACK */
- scif_recv_unreg_nack, /* SCIF_UNREGISTER_NACK */
- scif_alloc_req, /* SCIF_ALLOC_REQ */
- scif_alloc_gnt_rej, /* SCIF_ALLOC_GNT */
- scif_alloc_gnt_rej, /* SCIF_ALLOC_REJ */
- scif_free_virt, /* SCIF_FREE_VIRT */
- scif_recv_munmap, /* SCIF_MUNMAP */
- scif_recv_mark, /* SCIF_MARK */
- scif_recv_mark_resp, /* SCIF_MARK_ACK */
- scif_recv_mark_resp, /* SCIF_MARK_NACK */
- scif_recv_wait, /* SCIF_WAIT */
- scif_recv_wait_resp, /* SCIF_WAIT_ACK */
- scif_recv_wait_resp, /* SCIF_WAIT_NACK */
- scif_recv_sig_local, /* SCIF_SIG_LOCAL */
- scif_recv_sig_remote, /* SCIF_SIG_REMOTE */
- scif_recv_sig_resp, /* SCIF_SIG_ACK */
- scif_recv_sig_resp, /* SCIF_SIG_NACK */
-};
-
-static int scif_max_msg_id = SCIF_MAX_MSG;
-/**
- * scif_nodeqp_msg_handler() - Common handler for node messages
- * @scifdev: Remote device to respond to
- * @qp: Remote memory pointer
- * @msg: The message to be handled.
- *
- * This routine calls the appropriate routine to handle a Node Qp
- * message receipt
- */
-static void
-scif_nodeqp_msg_handler(struct scif_dev *scifdev,
- struct scif_qp *qp, struct scifmsg *msg)
-{
- scif_display_message(scifdev, msg, "Rcvd");
-
- if (msg->uop > (u32)scif_max_msg_id) {
- /* Bogus Node Qp Message? */
- dev_err(&scifdev->sdev->dev,
- "Unknown message 0x%xn scifdev->node 0x%x\n",
- msg->uop, scifdev->node);
- return;
- }
-
- scif_intr_func[msg->uop](scifdev, msg);
-}
-
-/**
- * scif_nodeqp_intrhandler() - Interrupt handler for node messages
- * @scifdev: Remote device to respond to
- * @qp: Remote memory pointer
- *
- * This routine is triggered by the interrupt mechanism. It reads
- * messages from the node queue RB and calls the Node QP Message handling
- * routine.
- */
-void scif_nodeqp_intrhandler(struct scif_dev *scifdev, struct scif_qp *qp)
-{
- struct scifmsg msg;
- int read_size;
-
- do {
- read_size = scif_rb_get_next(&qp->inbound_q, &msg, sizeof(msg));
- if (!read_size)
- break;
- scif_nodeqp_msg_handler(scifdev, qp, &msg);
- /*
- * The node queue pair is unmapped so skip the read pointer
- * update after receipt of a SCIF_EXIT_ACK
- */
- if (SCIF_EXIT_ACK == msg.uop)
- break;
- scif_rb_update_read_ptr(&qp->inbound_q);
- } while (1);
-}
-
-/**
- * scif_loopb_wq_handler - Loopback Workqueue Handler.
- * @unused: loop back work (unused)
- *
- * This work queue routine is invoked by the loopback work queue handler.
- * It grabs the recv lock, dequeues any available messages from the head
- * of the loopback message list, calls the node QP message handler,
- * waits for it to return, then frees up this message and dequeues more
- * elements of the list if available.
- */
-static void scif_loopb_wq_handler(struct work_struct *unused)
-{
- struct scif_dev *scifdev = scif_info.loopb_dev;
- struct scif_qp *qp = scifdev->qpairs;
- struct scif_loopb_msg *msg;
-
- do {
- msg = NULL;
- spin_lock(&qp->recv_lock);
- if (!list_empty(&scif_info.loopb_recv_q)) {
- msg = list_first_entry(&scif_info.loopb_recv_q,
- struct scif_loopb_msg,
- list);
- list_del(&msg->list);
- }
- spin_unlock(&qp->recv_lock);
-
- if (msg) {
- scif_nodeqp_msg_handler(scifdev, qp, &msg->msg);
- kfree(msg);
- }
- } while (msg);
-}
-
-/**
- * scif_loopb_msg_handler() - Workqueue handler for loopback messages.
- * @scifdev: SCIF device
- * @qp: Queue pair.
- *
- * This work queue routine is triggered when a loopback message is received.
- *
- * We need special handling for receiving Node Qp messages on a loopback SCIF
- * device via two workqueues for receiving messages.
- *
- * The reason we need the extra workqueue which is not required with *normal*
- * non-loopback SCIF devices is the potential classic deadlock described below:
- *
- * Thread A tries to send a message on a loopback SCIF device and blocks since
- * there is no space in the RB while it has the send_lock held or another
- * lock called lock X for example.
- *
- * Thread B: The Loopback Node QP message receive workqueue receives the message
- * and tries to send a message (eg an ACK) to the loopback SCIF device. It tries
- * to grab the send lock again or lock X and deadlocks with Thread A. The RB
- * cannot be drained any further due to this classic deadlock.
- *
- * In order to avoid deadlocks as mentioned above we have an extra level of
- * indirection achieved by having two workqueues.
- * 1) The first workqueue whose handler is scif_loopb_msg_handler reads
- * messages from the Node QP RB, adds them to a list and queues work for the
- * second workqueue.
- *
- * 2) The second workqueue whose handler is scif_loopb_wq_handler dequeues
- * messages from the list, handles them, frees up the memory and dequeues
- * more elements from the list if possible.
- */
-int
-scif_loopb_msg_handler(struct scif_dev *scifdev, struct scif_qp *qp)
-{
- int read_size;
- struct scif_loopb_msg *msg;
-
- do {
- msg = kmalloc(sizeof(*msg), GFP_KERNEL);
- if (!msg)
- return -ENOMEM;
- read_size = scif_rb_get_next(&qp->inbound_q, &msg->msg,
- sizeof(struct scifmsg));
- if (read_size != sizeof(struct scifmsg)) {
- kfree(msg);
- scif_rb_update_read_ptr(&qp->inbound_q);
- break;
- }
- spin_lock(&qp->recv_lock);
- list_add_tail(&msg->list, &scif_info.loopb_recv_q);
- spin_unlock(&qp->recv_lock);
- queue_work(scif_info.loopb_wq, &scif_info.loopb_work);
- scif_rb_update_read_ptr(&qp->inbound_q);
- } while (read_size == sizeof(struct scifmsg));
- return read_size;
-}
-
-/**
- * scif_setup_loopback_qp - One time setup work for Loopback Node Qp.
- * @scifdev: SCIF device
- *
- * Sets up the required loopback workqueues, queue pairs and ring buffers
- */
-int scif_setup_loopback_qp(struct scif_dev *scifdev)
-{
- int err = 0;
- void *local_q;
- struct scif_qp *qp;
-
- err = scif_setup_intr_wq(scifdev);
- if (err)
- goto exit;
- INIT_LIST_HEAD(&scif_info.loopb_recv_q);
- snprintf(scif_info.loopb_wqname, sizeof(scif_info.loopb_wqname),
- "SCIF LOOPB %d", scifdev->node);
- scif_info.loopb_wq =
- alloc_ordered_workqueue(scif_info.loopb_wqname, 0);
- if (!scif_info.loopb_wq) {
- err = -ENOMEM;
- goto destroy_intr;
- }
- INIT_WORK(&scif_info.loopb_work, scif_loopb_wq_handler);
- /* Allocate Self Qpair */
- scifdev->qpairs = kzalloc(sizeof(*scifdev->qpairs), GFP_KERNEL);
- if (!scifdev->qpairs) {
- err = -ENOMEM;
- goto destroy_loopb_wq;
- }
-
- qp = scifdev->qpairs;
- qp->magic = SCIFEP_MAGIC;
- spin_lock_init(&qp->send_lock);
- spin_lock_init(&qp->recv_lock);
-
- local_q = kzalloc(SCIF_NODE_QP_SIZE, GFP_KERNEL);
- if (!local_q) {
- err = -ENOMEM;
- goto free_qpairs;
- }
- /*
- * For loopback the inbound_q and outbound_q are essentially the same
- * since the Node sends a message on the loopback interface to the
- * outbound_q which is then received on the inbound_q.
- */
- scif_rb_init(&qp->outbound_q,
- &qp->local_read,
- &qp->local_write,
- local_q, get_count_order(SCIF_NODE_QP_SIZE));
-
- scif_rb_init(&qp->inbound_q,
- &qp->local_read,
- &qp->local_write,
- local_q, get_count_order(SCIF_NODE_QP_SIZE));
- scif_info.nodeid = scifdev->node;
-
- scif_peer_register_device(scifdev);
-
- scif_info.loopb_dev = scifdev;
- return err;
-free_qpairs:
- kfree(scifdev->qpairs);
-destroy_loopb_wq:
- destroy_workqueue(scif_info.loopb_wq);
-destroy_intr:
- scif_destroy_intr_wq(scifdev);
-exit:
- return err;
-}
-
-/**
- * scif_destroy_loopback_qp - One time uninit work for Loopback Node Qp
- * @scifdev: SCIF device
- *
- * Destroys the workqueues and frees up the Ring Buffer and Queue Pair memory.
- */
-int scif_destroy_loopback_qp(struct scif_dev *scifdev)
-{
- scif_peer_unregister_device(scifdev);
- destroy_workqueue(scif_info.loopb_wq);
- scif_destroy_intr_wq(scifdev);
- kfree(scifdev->qpairs->outbound_q.rb_base);
- kfree(scifdev->qpairs);
- scifdev->sdev = NULL;
- scif_info.loopb_dev = NULL;
- return 0;
-}
-
-void scif_destroy_p2p(struct scif_dev *scifdev)
-{
- struct scif_dev *peer_dev;
- struct scif_p2p_info *p2p;
- struct list_head *pos, *tmp;
- int bd;
-
- mutex_lock(&scif_info.conflock);
- /* Free P2P mappings in the given node for all its peer nodes */
- list_for_each_safe(pos, tmp, &scifdev->p2p) {
- p2p = list_entry(pos, struct scif_p2p_info, ppi_list);
- dma_unmap_sg(&scifdev->sdev->dev, p2p->ppi_sg[SCIF_PPI_MMIO],
- p2p->sg_nentries[SCIF_PPI_MMIO],
- DMA_BIDIRECTIONAL);
- dma_unmap_sg(&scifdev->sdev->dev, p2p->ppi_sg[SCIF_PPI_APER],
- p2p->sg_nentries[SCIF_PPI_APER],
- DMA_BIDIRECTIONAL);
- scif_p2p_freesg(p2p->ppi_sg[SCIF_PPI_MMIO]);
- scif_p2p_freesg(p2p->ppi_sg[SCIF_PPI_APER]);
- list_del(pos);
- kfree(p2p);
- }
-
- /* Free P2P mapping created in the peer nodes for the given node */
- for (bd = SCIF_MGMT_NODE + 1; bd <= scif_info.maxid; bd++) {
- peer_dev = &scif_dev[bd];
- list_for_each_safe(pos, tmp, &peer_dev->p2p) {
- p2p = list_entry(pos, struct scif_p2p_info, ppi_list);
- if (p2p->ppi_peer_id == scifdev->node) {
- dma_unmap_sg(&peer_dev->sdev->dev,
- p2p->ppi_sg[SCIF_PPI_MMIO],
- p2p->sg_nentries[SCIF_PPI_MMIO],
- DMA_BIDIRECTIONAL);
- dma_unmap_sg(&peer_dev->sdev->dev,
- p2p->ppi_sg[SCIF_PPI_APER],
- p2p->sg_nentries[SCIF_PPI_APER],
- DMA_BIDIRECTIONAL);
- scif_p2p_freesg(p2p->ppi_sg[SCIF_PPI_MMIO]);
- scif_p2p_freesg(p2p->ppi_sg[SCIF_PPI_APER]);
- list_del(pos);
- kfree(p2p);
- }
- }
- }
- mutex_unlock(&scif_info.conflock);
-}
+++ /dev/null
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * This file is provided under a dual BSD/GPLv2 license. When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * BSD LICENSE
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Intel SCIF driver.
- *
- */
-#ifndef SCIF_NODEQP
-#define SCIF_NODEQP
-
-#include "scif_rb.h"
-#include "scif_peer_bus.h"
-
-#define SCIF_INIT 1 /* First message sent to the peer node for discovery */
-#define SCIF_EXIT 2 /* Last message from the peer informing intent to exit */
-#define SCIF_EXIT_ACK 3 /* Response to SCIF_EXIT message */
-#define SCIF_NODE_ADD 4 /* Tell Online nodes a new node exits */
-#define SCIF_NODE_ADD_ACK 5 /* Confirm to mgmt node sequence is finished */
-#define SCIF_NODE_ADD_NACK 6 /* SCIF_NODE_ADD failed */
-#define SCIF_NODE_REMOVE 7 /* Request to deactivate a SCIF node */
-#define SCIF_NODE_REMOVE_ACK 8 /* Response to a SCIF_NODE_REMOVE message */
-#define SCIF_CNCT_REQ 9 /* Phys addr of Request connection to a port */
-#define SCIF_CNCT_GNT 10 /* Phys addr of new Grant connection request */
-#define SCIF_CNCT_GNTACK 11 /* Error type Reject a connection request */
-#define SCIF_CNCT_GNTNACK 12 /* Error type Reject a connection request */
-#define SCIF_CNCT_REJ 13 /* Error type Reject a connection request */
-#define SCIF_DISCNCT 14 /* Notify peer that connection is being terminated */
-#define SCIF_DISCNT_ACK 15 /* Notify peer that connection is being terminated */
-#define SCIF_CLIENT_SENT 16 /* Notify the peer that data has been written */
-#define SCIF_CLIENT_RCVD 17 /* Notify the peer that data has been read */
-#define SCIF_GET_NODE_INFO 18 /* Get current node mask from the mgmt node*/
-#define SCIF_REGISTER 19 /* Tell peer about a new registered window */
-#define SCIF_REGISTER_ACK 20 /* Notify peer about unregistration success */
-#define SCIF_REGISTER_NACK 21 /* Notify peer about registration success */
-#define SCIF_UNREGISTER 22 /* Tell peer about unregistering a window */
-#define SCIF_UNREGISTER_ACK 23 /* Notify peer about registration failure */
-#define SCIF_UNREGISTER_NACK 24 /* Notify peer about unregistration failure */
-#define SCIF_ALLOC_REQ 25 /* Request a mapped buffer */
-#define SCIF_ALLOC_GNT 26 /* Notify peer about allocation success */
-#define SCIF_ALLOC_REJ 27 /* Notify peer about allocation failure */
-#define SCIF_FREE_VIRT 28 /* Free previously allocated virtual memory */
-#define SCIF_MUNMAP 29 /* Acknowledgment for a SCIF_MMAP request */
-#define SCIF_MARK 30 /* SCIF Remote Fence Mark Request */
-#define SCIF_MARK_ACK 31 /* SCIF Remote Fence Mark Success */
-#define SCIF_MARK_NACK 32 /* SCIF Remote Fence Mark Failure */
-#define SCIF_WAIT 33 /* SCIF Remote Fence Wait Request */
-#define SCIF_WAIT_ACK 34 /* SCIF Remote Fence Wait Success */
-#define SCIF_WAIT_NACK 35 /* SCIF Remote Fence Wait Failure */
-#define SCIF_SIG_LOCAL 36 /* SCIF Remote Fence Local Signal Request */
-#define SCIF_SIG_REMOTE 37 /* SCIF Remote Fence Remote Signal Request */
-#define SCIF_SIG_ACK 38 /* SCIF Remote Fence Remote Signal Success */
-#define SCIF_SIG_NACK 39 /* SCIF Remote Fence Remote Signal Failure */
-#define SCIF_MAX_MSG SCIF_SIG_NACK
-
-/*
- * struct scifmsg - Node QP message format
- *
- * @src: Source information
- * @dst: Destination information
- * @uop: The message opcode
- * @payload: Unique payload format for each message
- */
-struct scifmsg {
- struct scif_port_id src;
- struct scif_port_id dst;
- u32 uop;
- u64 payload[4];
-} __packed;
-
-/*
- * struct scif_allocmsg - Used with SCIF_ALLOC_REQ to request
- * the remote note to allocate memory
- *
- * phys_addr: Physical address of the buffer
- * vaddr: Virtual address of the buffer
- * size: Size of the buffer
- * state: Current state
- * allocwq: wait queue for status
- */
-struct scif_allocmsg {
- dma_addr_t phys_addr;
- unsigned long vaddr;
- size_t size;
- enum scif_msg_state state;
- wait_queue_head_t allocwq;
-};
-
-/*
- * struct scif_qp - Node Queue Pair
- *
- * Interesting structure -- a little difficult because we can only
- * write across the PCIe, so any r/w pointer we need to read is
- * local. We only need to read the read pointer on the inbound_q
- * and read the write pointer in the outbound_q
- *
- * @magic: Magic value to ensure the peer sees the QP correctly
- * @outbound_q: The outbound ring buffer for sending messages
- * @inbound_q: The inbound ring buffer for receiving messages
- * @local_write: Local write index
- * @local_read: Local read index
- * @remote_qp: The remote queue pair
- * @local_buf: DMA address of local ring buffer
- * @local_qp: DMA address of the local queue pair data structure
- * @remote_buf: DMA address of remote ring buffer
- * @qp_state: QP state i.e. online or offline used for P2P
- * @send_lock: synchronize access to outbound queue
- * @recv_lock: Synchronize access to inbound queue
- */
-struct scif_qp {
- u64 magic;
-#define SCIFEP_MAGIC 0x5c1f000000005c1fULL
- struct scif_rb outbound_q;
- struct scif_rb inbound_q;
-
- u32 local_write __aligned(64);
- u32 local_read __aligned(64);
- struct scif_qp *remote_qp;
- dma_addr_t local_buf;
- dma_addr_t local_qp;
- dma_addr_t remote_buf;
- u32 qp_state;
-#define SCIF_QP_OFFLINE 0xdead
-#define SCIF_QP_ONLINE 0xc0de
- spinlock_t send_lock;
- spinlock_t recv_lock;
-};
-
-/*
- * struct scif_loopb_msg - An element in the loopback Node QP message list.
- *
- * @msg - The SCIF node QP message
- * @list - link in the list of messages
- */
-struct scif_loopb_msg {
- struct scifmsg msg;
- struct list_head list;
-};
-
-int scif_nodeqp_send(struct scif_dev *scifdev, struct scifmsg *msg);
-int _scif_nodeqp_send(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_nodeqp_intrhandler(struct scif_dev *scifdev, struct scif_qp *qp);
-int scif_loopb_msg_handler(struct scif_dev *scifdev, struct scif_qp *qp);
-int scif_setup_qp(struct scif_dev *scifdev);
-int scif_qp_response(phys_addr_t phys, struct scif_dev *dev);
-int scif_setup_qp_connect(struct scif_qp *qp, dma_addr_t *qp_offset,
- int local_size, struct scif_dev *scifdev);
-int scif_setup_qp_accept(struct scif_qp *qp, dma_addr_t *qp_offset,
- dma_addr_t phys, int local_size,
- struct scif_dev *scifdev);
-int scif_setup_qp_connect_response(struct scif_dev *scifdev,
- struct scif_qp *qp, u64 payload);
-int scif_setup_loopback_qp(struct scif_dev *scifdev);
-int scif_destroy_loopback_qp(struct scif_dev *scifdev);
-void scif_poll_qp_state(struct work_struct *work);
-void scif_destroy_p2p(struct scif_dev *scifdev);
-void scif_send_exit(struct scif_dev *scifdev);
-static inline struct device *scif_get_peer_dev(struct scif_dev *scifdev)
-{
- struct scif_peer_dev *spdev;
- struct device *spdev_ret;
-
- rcu_read_lock();
- spdev = rcu_dereference(scifdev->spdev);
- if (spdev)
- spdev_ret = get_device(&spdev->dev);
- else
- spdev_ret = ERR_PTR(-ENODEV);
- rcu_read_unlock();
- return spdev_ret;
-}
-
-static inline void scif_put_peer_dev(struct device *dev)
-{
- put_device(dev);
-}
-#endif /* SCIF_NODEQP */
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#include "scif_main.h"
-#include "../bus/scif_bus.h"
-#include "scif_peer_bus.h"
-
-static inline struct scif_peer_dev *
-dev_to_scif_peer(struct device *dev)
-{
- return container_of(dev, struct scif_peer_dev, dev);
-}
-
-struct bus_type scif_peer_bus = {
- .name = "scif_peer_bus",
-};
-
-static void scif_peer_release_dev(struct device *d)
-{
- struct scif_peer_dev *sdev = dev_to_scif_peer(d);
- struct scif_dev *scifdev = &scif_dev[sdev->dnode];
-
- scif_cleanup_scifdev(scifdev);
- kfree(sdev);
-}
-
-static int scif_peer_initialize_device(struct scif_dev *scifdev)
-{
- struct scif_peer_dev *spdev;
- int ret;
-
- spdev = kzalloc(sizeof(*spdev), GFP_KERNEL);
- if (!spdev) {
- ret = -ENOMEM;
- goto err;
- }
-
- spdev->dev.parent = scifdev->sdev->dev.parent;
- spdev->dev.release = scif_peer_release_dev;
- spdev->dnode = scifdev->node;
- spdev->dev.bus = &scif_peer_bus;
- dev_set_name(&spdev->dev, "scif_peer-dev%u", spdev->dnode);
-
- device_initialize(&spdev->dev);
- get_device(&spdev->dev);
- rcu_assign_pointer(scifdev->spdev, spdev);
-
- mutex_lock(&scif_info.conflock);
- scif_info.total++;
- scif_info.maxid = max_t(u32, spdev->dnode, scif_info.maxid);
- mutex_unlock(&scif_info.conflock);
- return 0;
-err:
- dev_err(&scifdev->sdev->dev,
- "dnode %d: initialize_device rc %d\n", scifdev->node, ret);
- return ret;
-}
-
-static int scif_peer_add_device(struct scif_dev *scifdev)
-{
- struct scif_peer_dev *spdev = rcu_dereference(scifdev->spdev);
- char pool_name[16];
- int ret;
-
- ret = device_add(&spdev->dev);
- put_device(&spdev->dev);
- if (ret) {
- dev_err(&scifdev->sdev->dev,
- "dnode %d: peer device_add failed\n", scifdev->node);
- goto put_spdev;
- }
-
- scnprintf(pool_name, sizeof(pool_name), "scif-%d", spdev->dnode);
- scifdev->signal_pool = dmam_pool_create(pool_name, &scifdev->sdev->dev,
- sizeof(struct scif_status), 1,
- 0);
- if (!scifdev->signal_pool) {
- dev_err(&scifdev->sdev->dev,
- "dnode %d: dmam_pool_create failed\n", scifdev->node);
- ret = -ENOMEM;
- goto del_spdev;
- }
- dev_dbg(&spdev->dev, "Added peer dnode %d\n", spdev->dnode);
- return 0;
-del_spdev:
- device_del(&spdev->dev);
-put_spdev:
- RCU_INIT_POINTER(scifdev->spdev, NULL);
- synchronize_rcu();
- put_device(&spdev->dev);
-
- mutex_lock(&scif_info.conflock);
- scif_info.total--;
- mutex_unlock(&scif_info.conflock);
- return ret;
-}
-
-void scif_add_peer_device(struct work_struct *work)
-{
- struct scif_dev *scifdev = container_of(work, struct scif_dev,
- peer_add_work);
-
- scif_peer_add_device(scifdev);
-}
-
-/*
- * Peer device registration is split into a device_initialize and a device_add.
- * The reason for doing this is as follows: First, peer device registration
- * itself cannot be done in the message processing thread and must be delegated
- * to another workqueue, otherwise if SCIF client probe, called during peer
- * device registration, calls scif_connect(..), it will block the message
- * processing thread causing a deadlock. Next, device_initialize is done in the
- * "top-half" message processing thread and device_add in the "bottom-half"
- * workqueue. If this is not done, SCIF_CNCT_REQ message processing executing
- * concurrently with SCIF_INIT message processing is unable to get a reference
- * on the peer device, thereby failing the connect request.
- */
-void scif_peer_register_device(struct scif_dev *scifdev)
-{
- int ret;
-
- mutex_lock(&scifdev->lock);
- ret = scif_peer_initialize_device(scifdev);
- if (ret)
- goto exit;
- schedule_work(&scifdev->peer_add_work);
-exit:
- mutex_unlock(&scifdev->lock);
-}
-
-int scif_peer_unregister_device(struct scif_dev *scifdev)
-{
- struct scif_peer_dev *spdev;
-
- mutex_lock(&scifdev->lock);
- /* Flush work to ensure device register is complete */
- flush_work(&scifdev->peer_add_work);
-
- /*
- * Continue holding scifdev->lock since theoretically unregister_device
- * can be called simultaneously from multiple threads
- */
- spdev = rcu_dereference(scifdev->spdev);
- if (!spdev) {
- mutex_unlock(&scifdev->lock);
- return -ENODEV;
- }
-
- RCU_INIT_POINTER(scifdev->spdev, NULL);
- synchronize_rcu();
- mutex_unlock(&scifdev->lock);
-
- dev_dbg(&spdev->dev, "Removing peer dnode %d\n", spdev->dnode);
- device_unregister(&spdev->dev);
-
- mutex_lock(&scif_info.conflock);
- scif_info.total--;
- mutex_unlock(&scif_info.conflock);
- return 0;
-}
-
-int scif_peer_bus_init(void)
-{
- return bus_register(&scif_peer_bus);
-}
-
-void scif_peer_bus_exit(void)
-{
- bus_unregister(&scif_peer_bus);
-}
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#ifndef _SCIF_PEER_BUS_H_
-#define _SCIF_PEER_BUS_H_
-
-#include <linux/device.h>
-#include <linux/mic_common.h>
-#include <linux/scif.h>
-
-struct scif_dev;
-
-void scif_add_peer_device(struct work_struct *work);
-void scif_peer_register_device(struct scif_dev *sdev);
-int scif_peer_unregister_device(struct scif_dev *scifdev);
-int scif_peer_bus_init(void);
-void scif_peer_bus_exit(void);
-#endif /* _SCIF_PEER_BUS_H */
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#include <linux/idr.h>
-
-#include "scif_main.h"
-
-#define SCIF_PORT_COUNT 0x10000 /* Ports available */
-
-struct idr scif_ports;
-
-/**
- * struct scif_port - SCIF port information
- *
- * @ref_cnt: Reference count since there can be multiple endpoints
- * created via scif_accept(..) simultaneously using a port.
- */
-struct scif_port {
- int ref_cnt;
-};
-
-/**
- * __scif_get_port - Reserve a specified port # for SCIF and add it
- * to the global list.
- * @start: lowest port # to be reserved (inclusive).
- * @end: highest port # to be reserved (exclusive).
- *
- * @return : Allocated SCIF port #, or -ENOSPC if port unavailable.
- * On memory allocation failure, returns -ENOMEM.
- */
-static int __scif_get_port(int start, int end)
-{
- int id;
- struct scif_port *port = kzalloc(sizeof(*port), GFP_ATOMIC);
-
- if (!port)
- return -ENOMEM;
- spin_lock(&scif_info.port_lock);
- id = idr_alloc(&scif_ports, port, start, end, GFP_ATOMIC);
- if (id >= 0)
- port->ref_cnt++;
- spin_unlock(&scif_info.port_lock);
- return id;
-}
-
-/**
- * scif_rsrv_port - Reserve a specified port # for SCIF.
- * @port : port # to be reserved.
- *
- * @return : Allocated SCIF port #, or -ENOSPC if port unavailable.
- * On memory allocation failure, returns -ENOMEM.
- */
-int scif_rsrv_port(u16 port)
-{
- return __scif_get_port(port, port + 1);
-}
-
-/**
- * scif_get_new_port - Get and reserve any port # for SCIF in the range
- * SCIF_PORT_RSVD + 1 to SCIF_PORT_COUNT - 1.
- *
- * @return : Allocated SCIF port #, or -ENOSPC if no ports available.
- * On memory allocation failure, returns -ENOMEM.
- */
-int scif_get_new_port(void)
-{
- return __scif_get_port(SCIF_PORT_RSVD + 1, SCIF_PORT_COUNT);
-}
-
-/**
- * scif_get_port - Increment the reference count for a SCIF port
- * @id : SCIF port
- *
- * @return : None
- */
-void scif_get_port(u16 id)
-{
- struct scif_port *port;
-
- if (!id)
- return;
- spin_lock(&scif_info.port_lock);
- port = idr_find(&scif_ports, id);
- if (port)
- port->ref_cnt++;
- spin_unlock(&scif_info.port_lock);
-}
-
-/**
- * scif_put_port - Release a reserved SCIF port
- * @id : SCIF port to be released.
- *
- * @return : None
- */
-void scif_put_port(u16 id)
-{
- struct scif_port *port;
-
- if (!id)
- return;
- spin_lock(&scif_info.port_lock);
- port = idr_find(&scif_ports, id);
- if (port) {
- port->ref_cnt--;
- if (!port->ref_cnt) {
- idr_remove(&scif_ports, id);
- kfree(port);
- }
- }
- spin_unlock(&scif_info.port_lock);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#include <linux/circ_buf.h>
-#include <linux/types.h>
-#include <linux/io.h>
-#include <linux/errno.h>
-
-#include "scif_rb.h"
-
-#define scif_rb_ring_cnt(head, tail, size) CIRC_CNT(head, tail, size)
-#define scif_rb_ring_space(head, tail, size) CIRC_SPACE(head, tail, size)
-
-/**
- * scif_rb_init - Initializes the ring buffer
- * @rb: ring buffer
- * @read_ptr: A pointer to the read offset
- * @write_ptr: A pointer to the write offset
- * @rb_base: A pointer to the base of the ring buffer
- * @size: The size of the ring buffer in powers of two
- */
-void scif_rb_init(struct scif_rb *rb, u32 *read_ptr, u32 *write_ptr,
- void *rb_base, u8 size)
-{
- rb->rb_base = rb_base;
- rb->size = (1 << size);
- rb->read_ptr = read_ptr;
- rb->write_ptr = write_ptr;
- rb->current_read_offset = *read_ptr;
- rb->current_write_offset = *write_ptr;
-}
-
-/* Copies a message to the ring buffer -- handles the wrap around case */
-static void memcpy_torb(struct scif_rb *rb, void *header,
- void *msg, u32 size)
-{
- u32 size1, size2;
-
- if (header + size >= rb->rb_base + rb->size) {
- /* Need to call two copies if it wraps around */
- size1 = (u32)(rb->rb_base + rb->size - header);
- size2 = size - size1;
- memcpy_toio((void __iomem __force *)header, msg, size1);
- memcpy_toio((void __iomem __force *)rb->rb_base,
- msg + size1, size2);
- } else {
- memcpy_toio((void __iomem __force *)header, msg, size);
- }
-}
-
-/* Copies a message from the ring buffer -- handles the wrap around case */
-static void memcpy_fromrb(struct scif_rb *rb, void *header,
- void *msg, u32 size)
-{
- u32 size1, size2;
-
- if (header + size >= rb->rb_base + rb->size) {
- /* Need to call two copies if it wraps around */
- size1 = (u32)(rb->rb_base + rb->size - header);
- size2 = size - size1;
- memcpy_fromio(msg, (void __iomem __force *)header, size1);
- memcpy_fromio(msg + size1,
- (void __iomem __force *)rb->rb_base, size2);
- } else {
- memcpy_fromio(msg, (void __iomem __force *)header, size);
- }
-}
-
-/**
- * scif_rb_space - Query space available for writing to the RB
- * @rb: ring buffer
- *
- * Return: size available for writing to RB in bytes.
- */
-u32 scif_rb_space(struct scif_rb *rb)
-{
- rb->current_read_offset = *rb->read_ptr;
- /*
- * Update from the HW read pointer only once the peer has exposed the
- * new empty slot. This barrier is paired with the memory barrier
- * scif_rb_update_read_ptr()
- */
- mb();
- return scif_rb_ring_space(rb->current_write_offset,
- rb->current_read_offset, rb->size);
-}
-
-/**
- * scif_rb_write - Write a message to the RB
- * @rb: ring buffer
- * @msg: buffer to send the message. Must be at least size bytes long
- * @size: the size (in bytes) to be copied to the RB
- *
- * This API does not block if there isn't enough space in the RB.
- * Returns: 0 on success or -ENOMEM on failure
- */
-int scif_rb_write(struct scif_rb *rb, void *msg, u32 size)
-{
- void *header;
-
- if (scif_rb_space(rb) < size)
- return -ENOMEM;
- header = rb->rb_base + rb->current_write_offset;
- memcpy_torb(rb, header, msg, size);
- /*
- * Wait until scif_rb_commit(). Update the local ring
- * buffer data, not the shared data until commit.
- */
- rb->current_write_offset =
- (rb->current_write_offset + size) & (rb->size - 1);
- return 0;
-}
-
-/**
- * scif_rb_commit - To submit the message to let the peer fetch it
- * @rb: ring buffer
- */
-void scif_rb_commit(struct scif_rb *rb)
-{
- /*
- * We must ensure ordering between the all the data committed
- * previously before we expose the new message to the peer by
- * updating the write_ptr. This write barrier is paired with
- * the read barrier in scif_rb_count(..)
- */
- wmb();
- WRITE_ONCE(*rb->write_ptr, rb->current_write_offset);
-#ifdef CONFIG_INTEL_MIC_CARD
- /*
- * X100 Si bug: For the case where a Core is performing an EXT_WR
- * followed by a Doorbell Write, the Core must perform two EXT_WR to the
- * same address with the same data before it does the Doorbell Write.
- * This way, if ordering is violated for the Interrupt Message, it will
- * fall just behind the first Posted associated with the first EXT_WR.
- */
- WRITE_ONCE(*rb->write_ptr, rb->current_write_offset);
-#endif
-}
-
-/**
- * scif_rb_get - To get next message from the ring buffer
- * @rb: ring buffer
- * @size: Number of bytes to be read
- *
- * Return: NULL if no bytes to be read from the ring buffer, otherwise the
- * pointer to the next byte
- */
-static void *scif_rb_get(struct scif_rb *rb, u32 size)
-{
- void *header = NULL;
-
- if (scif_rb_count(rb, size) >= size)
- header = rb->rb_base + rb->current_read_offset;
- return header;
-}
-
-/*
- * scif_rb_get_next - Read from ring buffer.
- * @rb: ring buffer
- * @msg: buffer to hold the message. Must be at least size bytes long
- * @size: Number of bytes to be read
- *
- * Return: number of bytes read if available bytes are >= size, otherwise
- * returns zero.
- */
-u32 scif_rb_get_next(struct scif_rb *rb, void *msg, u32 size)
-{
- void *header = NULL;
- int read_size = 0;
-
- header = scif_rb_get(rb, size);
- if (header) {
- u32 next_cmd_offset =
- (rb->current_read_offset + size) & (rb->size - 1);
-
- read_size = size;
- rb->current_read_offset = next_cmd_offset;
- memcpy_fromrb(rb, header, msg, size);
- }
- return read_size;
-}
-
-/**
- * scif_rb_update_read_ptr
- * @rb: ring buffer
- */
-void scif_rb_update_read_ptr(struct scif_rb *rb)
-{
- u32 new_offset;
-
- new_offset = rb->current_read_offset;
- /*
- * We must ensure ordering between the all the data committed or read
- * previously before we expose the empty slot to the peer by updating
- * the read_ptr. This barrier is paired with the memory barrier in
- * scif_rb_space(..)
- */
- mb();
- WRITE_ONCE(*rb->read_ptr, new_offset);
-#ifdef CONFIG_INTEL_MIC_CARD
- /*
- * X100 Si Bug: For the case where a Core is performing an EXT_WR
- * followed by a Doorbell Write, the Core must perform two EXT_WR to the
- * same address with the same data before it does the Doorbell Write.
- * This way, if ordering is violated for the Interrupt Message, it will
- * fall just behind the first Posted associated with the first EXT_WR.
- */
- WRITE_ONCE(*rb->read_ptr, new_offset);
-#endif
-}
-
-/**
- * scif_rb_count
- * @rb: ring buffer
- * @size: Number of bytes expected to be read
- *
- * Return: number of bytes that can be read from the RB
- */
-u32 scif_rb_count(struct scif_rb *rb, u32 size)
-{
- if (scif_rb_ring_cnt(rb->current_write_offset,
- rb->current_read_offset,
- rb->size) < size) {
- rb->current_write_offset = *rb->write_ptr;
- /*
- * Update from the HW write pointer if empty only once the peer
- * has exposed the new message. This read barrier is paired
- * with the write barrier in scif_rb_commit(..)
- */
- smp_rmb();
- }
- return scif_rb_ring_cnt(rb->current_write_offset,
- rb->current_read_offset,
- rb->size);
-}
+++ /dev/null
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * This file is provided under a dual BSD/GPLv2 license. When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * BSD LICENSE
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Intel SCIF driver.
- */
-#ifndef SCIF_RB_H
-#define SCIF_RB_H
-/*
- * This file describes a general purpose, byte based ring buffer. Writers to the
- * ring buffer need to synchronize using a lock. The same is true for readers,
- * although in practice, the ring buffer has a single reader. It is lockless
- * between producer and consumer so it can handle being used across the PCIe
- * bus. The ring buffer ensures that there are no reads across the PCIe bus for
- * performance reasons. Two of these are used to form a single bidirectional
- * queue-pair across PCIe.
- */
-/*
- * struct scif_rb - SCIF Ring Buffer
- *
- * @rb_base: The base of the memory used for storing RB messages
- * @read_ptr: Pointer to the read offset
- * @write_ptr: Pointer to the write offset
- * @size: Size of the memory in rb_base
- * @current_read_offset: Cached read offset for performance
- * @current_write_offset: Cached write offset for performance
- */
-struct scif_rb {
- void *rb_base;
- u32 *read_ptr;
- u32 *write_ptr;
- u32 size;
- u32 current_read_offset;
- u32 current_write_offset;
-};
-
-/* methods used by both */
-void scif_rb_init(struct scif_rb *rb, u32 *read_ptr, u32 *write_ptr,
- void *rb_base, u8 size);
-/* writer only methods */
-/* write a new command, then scif_rb_commit() */
-int scif_rb_write(struct scif_rb *rb, void *msg, u32 size);
-/* after write(), then scif_rb_commit() */
-void scif_rb_commit(struct scif_rb *rb);
-/* query space available for writing to a RB. */
-u32 scif_rb_space(struct scif_rb *rb);
-
-/* reader only methods */
-/* read a new message from the ring buffer of size bytes */
-u32 scif_rb_get_next(struct scif_rb *rb, void *msg, u32 size);
-/* update the read pointer so that the space can be reused */
-void scif_rb_update_read_ptr(struct scif_rb *rb);
-/* count the number of bytes that can be read */
-u32 scif_rb_count(struct scif_rb *rb, u32 size);
-#endif
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2015 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#include <linux/intel-iommu.h>
-#include <linux/pagemap.h>
-#include <linux/sched/mm.h>
-#include <linux/sched/signal.h>
-
-#include "scif_main.h"
-#include "scif_map.h"
-
-/* Used to skip ulimit checks for registrations with SCIF_MAP_KERNEL flag */
-#define SCIF_MAP_ULIMIT 0x40
-
-bool scif_ulimit_check = 1;
-
-/**
- * scif_rma_ep_init:
- * @ep: end point
- *
- * Initialize RMA per EP data structures.
- */
-void scif_rma_ep_init(struct scif_endpt *ep)
-{
- struct scif_endpt_rma_info *rma = &ep->rma_info;
-
- mutex_init(&rma->rma_lock);
- init_iova_domain(&rma->iovad, PAGE_SIZE, SCIF_IOVA_START_PFN);
- spin_lock_init(&rma->tc_lock);
- mutex_init(&rma->mmn_lock);
- INIT_LIST_HEAD(&rma->reg_list);
- INIT_LIST_HEAD(&rma->remote_reg_list);
- atomic_set(&rma->tw_refcount, 0);
- atomic_set(&rma->tcw_refcount, 0);
- atomic_set(&rma->tcw_total_pages, 0);
- atomic_set(&rma->fence_refcount, 0);
-
- rma->async_list_del = 0;
- rma->dma_chan = NULL;
- INIT_LIST_HEAD(&rma->mmn_list);
- INIT_LIST_HEAD(&rma->vma_list);
- init_waitqueue_head(&rma->markwq);
-}
-
-/**
- * scif_rma_ep_can_uninit:
- * @ep: end point
- *
- * Returns 1 if an endpoint can be uninitialized and 0 otherwise.
- */
-int scif_rma_ep_can_uninit(struct scif_endpt *ep)
-{
- int ret = 0;
-
- mutex_lock(&ep->rma_info.rma_lock);
- /* Destroy RMA Info only if both lists are empty */
- if (list_empty(&ep->rma_info.reg_list) &&
- list_empty(&ep->rma_info.remote_reg_list) &&
- list_empty(&ep->rma_info.mmn_list) &&
- !atomic_read(&ep->rma_info.tw_refcount) &&
- !atomic_read(&ep->rma_info.tcw_refcount) &&
- !atomic_read(&ep->rma_info.fence_refcount))
- ret = 1;
- mutex_unlock(&ep->rma_info.rma_lock);
- return ret;
-}
-
-/**
- * scif_create_pinned_pages:
- * @nr_pages: number of pages in window
- * @prot: read/write protection
- *
- * Allocate and prepare a set of pinned pages.
- */
-static struct scif_pinned_pages *
-scif_create_pinned_pages(int nr_pages, int prot)
-{
- struct scif_pinned_pages *pin;
-
- might_sleep();
- pin = scif_zalloc(sizeof(*pin));
- if (!pin)
- goto error;
-
- pin->pages = scif_zalloc(nr_pages * sizeof(*pin->pages));
- if (!pin->pages)
- goto error_free_pinned_pages;
-
- pin->prot = prot;
- pin->magic = SCIFEP_MAGIC;
- return pin;
-
-error_free_pinned_pages:
- scif_free(pin, sizeof(*pin));
-error:
- return NULL;
-}
-
-/**
- * scif_destroy_pinned_pages:
- * @pin: A set of pinned pages.
- *
- * Deallocate resources for pinned pages.
- */
-static int scif_destroy_pinned_pages(struct scif_pinned_pages *pin)
-{
- int j;
- int writeable = pin->prot & SCIF_PROT_WRITE;
- int kernel = SCIF_MAP_KERNEL & pin->map_flags;
-
- if (kernel) {
- for (j = 0; j < pin->nr_pages; j++) {
- if (pin->pages[j] && !kernel) {
- if (writeable)
- set_page_dirty_lock(pin->pages[j]);
- put_page(pin->pages[j]);
- }
- }
- } else
- unpin_user_pages_dirty_lock(pin->pages, pin->nr_pages,
- writeable);
- scif_free(pin->pages,
- pin->nr_pages * sizeof(*pin->pages));
- scif_free(pin, sizeof(*pin));
- return 0;
-}
-
-/*
- * scif_create_window:
- * @ep: end point
- * @nr_pages: number of pages
- * @offset: registration offset
- * @temp: true if a temporary window is being created
- *
- * Allocate and prepare a self registration window.
- */
-struct scif_window *scif_create_window(struct scif_endpt *ep, int nr_pages,
- s64 offset, bool temp)
-{
- struct scif_window *window;
-
- might_sleep();
- window = scif_zalloc(sizeof(*window));
- if (!window)
- goto error;
-
- window->dma_addr = scif_zalloc(nr_pages * sizeof(*window->dma_addr));
- if (!window->dma_addr)
- goto error_free_window;
-
- window->num_pages = scif_zalloc(nr_pages * sizeof(*window->num_pages));
- if (!window->num_pages)
- goto error_free_window;
-
- window->offset = offset;
- window->ep = (u64)ep;
- window->magic = SCIFEP_MAGIC;
- window->reg_state = OP_IDLE;
- init_waitqueue_head(&window->regwq);
- window->unreg_state = OP_IDLE;
- init_waitqueue_head(&window->unregwq);
- INIT_LIST_HEAD(&window->list);
- window->type = SCIF_WINDOW_SELF;
- window->temp = temp;
- return window;
-
-error_free_window:
- scif_free(window->dma_addr,
- nr_pages * sizeof(*window->dma_addr));
- scif_free(window, sizeof(*window));
-error:
- return NULL;
-}
-
-/**
- * scif_destroy_incomplete_window:
- * @ep: end point
- * @window: registration window
- *
- * Deallocate resources for self window.
- */
-static void scif_destroy_incomplete_window(struct scif_endpt *ep,
- struct scif_window *window)
-{
- int err;
- int nr_pages = window->nr_pages;
- struct scif_allocmsg *alloc = &window->alloc_handle;
- struct scifmsg msg;
-
-retry:
- /* Wait for a SCIF_ALLOC_GNT/REJ message */
- err = wait_event_timeout(alloc->allocwq,
- alloc->state != OP_IN_PROGRESS,
- SCIF_NODE_ALIVE_TIMEOUT);
- if (!err && scifdev_alive(ep))
- goto retry;
-
- mutex_lock(&ep->rma_info.rma_lock);
- if (alloc->state == OP_COMPLETED) {
- msg.uop = SCIF_FREE_VIRT;
- msg.src = ep->port;
- msg.payload[0] = ep->remote_ep;
- msg.payload[1] = window->alloc_handle.vaddr;
- msg.payload[2] = (u64)window;
- msg.payload[3] = SCIF_REGISTER;
- _scif_nodeqp_send(ep->remote_dev, &msg);
- }
- mutex_unlock(&ep->rma_info.rma_lock);
-
- scif_free_window_offset(ep, window, window->offset);
- scif_free(window->dma_addr, nr_pages * sizeof(*window->dma_addr));
- scif_free(window->num_pages, nr_pages * sizeof(*window->num_pages));
- scif_free(window, sizeof(*window));
-}
-
-/**
- * scif_unmap_window:
- * @remote_dev: SCIF remote device
- * @window: registration window
- *
- * Delete any DMA mappings created for a registered self window
- */
-void scif_unmap_window(struct scif_dev *remote_dev, struct scif_window *window)
-{
- int j;
-
- if (scif_is_iommu_enabled() && !scifdev_self(remote_dev)) {
- if (window->st) {
- dma_unmap_sg(&remote_dev->sdev->dev,
- window->st->sgl, window->st->nents,
- DMA_BIDIRECTIONAL);
- sg_free_table(window->st);
- kfree(window->st);
- window->st = NULL;
- }
- } else {
- for (j = 0; j < window->nr_contig_chunks; j++) {
- if (window->dma_addr[j]) {
- scif_unmap_single(window->dma_addr[j],
- remote_dev,
- window->num_pages[j] <<
- PAGE_SHIFT);
- window->dma_addr[j] = 0x0;
- }
- }
- }
-}
-
-static inline struct mm_struct *__scif_acquire_mm(void)
-{
- if (scif_ulimit_check)
- return get_task_mm(current);
- return NULL;
-}
-
-static inline void __scif_release_mm(struct mm_struct *mm)
-{
- if (mm)
- mmput(mm);
-}
-
-static inline int
-__scif_dec_pinned_vm_lock(struct mm_struct *mm,
- int nr_pages)
-{
- if (!mm || !nr_pages || !scif_ulimit_check)
- return 0;
-
- atomic64_sub(nr_pages, &mm->pinned_vm);
- return 0;
-}
-
-static inline int __scif_check_inc_pinned_vm(struct mm_struct *mm,
- int nr_pages)
-{
- unsigned long locked, lock_limit;
-
- if (!mm || !nr_pages || !scif_ulimit_check)
- return 0;
-
- lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
- locked = atomic64_add_return(nr_pages, &mm->pinned_vm);
-
- if ((locked > lock_limit) && !capable(CAP_IPC_LOCK)) {
- atomic64_sub(nr_pages, &mm->pinned_vm);
- dev_err(scif_info.mdev.this_device,
- "locked(%lu) > lock_limit(%lu)\n",
- locked, lock_limit);
- return -ENOMEM;
- }
- return 0;
-}
-
-/**
- * scif_destroy_window:
- * @ep: end point
- * @window: registration window
- *
- * Deallocate resources for self window.
- */
-int scif_destroy_window(struct scif_endpt *ep, struct scif_window *window)
-{
- int j;
- struct scif_pinned_pages *pinned_pages = window->pinned_pages;
- int nr_pages = window->nr_pages;
-
- might_sleep();
- if (!window->temp && window->mm) {
- __scif_dec_pinned_vm_lock(window->mm, window->nr_pages);
- __scif_release_mm(window->mm);
- window->mm = NULL;
- }
-
- scif_free_window_offset(ep, window, window->offset);
- scif_unmap_window(ep->remote_dev, window);
- /*
- * Decrement references for this set of pinned pages from
- * this window.
- */
- j = atomic_sub_return(1, &pinned_pages->ref_count);
- if (j < 0)
- dev_err(scif_info.mdev.this_device,
- "%s %d incorrect ref count %d\n",
- __func__, __LINE__, j);
- /*
- * If the ref count for pinned_pages is zero then someone
- * has already called scif_unpin_pages() for it and we should
- * destroy the page cache.
- */
- if (!j)
- scif_destroy_pinned_pages(window->pinned_pages);
- scif_free(window->dma_addr, nr_pages * sizeof(*window->dma_addr));
- scif_free(window->num_pages, nr_pages * sizeof(*window->num_pages));
- window->magic = 0;
- scif_free(window, sizeof(*window));
- return 0;
-}
-
-/**
- * scif_create_remote_lookup:
- * @remote_dev: SCIF remote device
- * @window: remote window
- *
- * Allocate and prepare lookup entries for the remote
- * end to copy over the physical addresses.
- * Returns 0 on success and appropriate errno on failure.
- */
-static int scif_create_remote_lookup(struct scif_dev *remote_dev,
- struct scif_window *window)
-{
- int i, j, err = 0;
- int nr_pages = window->nr_pages;
- bool vmalloc_dma_phys, vmalloc_num_pages;
-
- might_sleep();
- /* Map window */
- err = scif_map_single(&window->mapped_offset,
- window, remote_dev, sizeof(*window));
- if (err)
- goto error_window;
-
- /* Compute the number of lookup entries. 21 == 2MB Shift */
- window->nr_lookup = ALIGN(nr_pages * PAGE_SIZE,
- ((2) * 1024 * 1024)) >> 21;
-
- window->dma_addr_lookup.lookup =
- scif_alloc_coherent(&window->dma_addr_lookup.offset,
- remote_dev, window->nr_lookup *
- sizeof(*window->dma_addr_lookup.lookup),
- GFP_KERNEL | __GFP_ZERO);
- if (!window->dma_addr_lookup.lookup) {
- err = -ENOMEM;
- goto error_window;
- }
-
- window->num_pages_lookup.lookup =
- scif_alloc_coherent(&window->num_pages_lookup.offset,
- remote_dev, window->nr_lookup *
- sizeof(*window->num_pages_lookup.lookup),
- GFP_KERNEL | __GFP_ZERO);
- if (!window->num_pages_lookup.lookup) {
- err = -ENOMEM;
- goto error_window;
- }
-
- vmalloc_dma_phys = is_vmalloc_addr(&window->dma_addr[0]);
- vmalloc_num_pages = is_vmalloc_addr(&window->num_pages[0]);
-
- /* Now map each of the pages containing physical addresses */
- for (i = 0, j = 0; i < nr_pages; i += SCIF_NR_ADDR_IN_PAGE, j++) {
- err = scif_map_page(&window->dma_addr_lookup.lookup[j],
- vmalloc_dma_phys ?
- vmalloc_to_page(&window->dma_addr[i]) :
- virt_to_page(&window->dma_addr[i]),
- remote_dev);
- if (err)
- goto error_window;
- err = scif_map_page(&window->num_pages_lookup.lookup[j],
- vmalloc_num_pages ?
- vmalloc_to_page(&window->num_pages[i]) :
- virt_to_page(&window->num_pages[i]),
- remote_dev);
- if (err)
- goto error_window;
- }
- return 0;
-error_window:
- return err;
-}
-
-/**
- * scif_destroy_remote_lookup:
- * @remote_dev: SCIF remote device
- * @window: remote window
- *
- * Destroy lookup entries used for the remote
- * end to copy over the physical addresses.
- */
-static void scif_destroy_remote_lookup(struct scif_dev *remote_dev,
- struct scif_window *window)
-{
- int i, j;
-
- if (window->nr_lookup) {
- struct scif_rma_lookup *lup = &window->dma_addr_lookup;
- struct scif_rma_lookup *npup = &window->num_pages_lookup;
-
- for (i = 0, j = 0; i < window->nr_pages;
- i += SCIF_NR_ADDR_IN_PAGE, j++) {
- if (lup->lookup && lup->lookup[j])
- scif_unmap_single(lup->lookup[j],
- remote_dev,
- PAGE_SIZE);
- if (npup->lookup && npup->lookup[j])
- scif_unmap_single(npup->lookup[j],
- remote_dev,
- PAGE_SIZE);
- }
- if (lup->lookup)
- scif_free_coherent(lup->lookup, lup->offset,
- remote_dev, window->nr_lookup *
- sizeof(*lup->lookup));
- if (npup->lookup)
- scif_free_coherent(npup->lookup, npup->offset,
- remote_dev, window->nr_lookup *
- sizeof(*npup->lookup));
- if (window->mapped_offset)
- scif_unmap_single(window->mapped_offset,
- remote_dev, sizeof(*window));
- window->nr_lookup = 0;
- }
-}
-
-/**
- * scif_create_remote_window:
- * @scifdev: SCIF device
- * @nr_pages: number of pages in window
- *
- * Allocate and prepare a remote registration window.
- */
-static struct scif_window *
-scif_create_remote_window(struct scif_dev *scifdev, int nr_pages)
-{
- struct scif_window *window;
-
- might_sleep();
- window = scif_zalloc(sizeof(*window));
- if (!window)
- goto error_ret;
-
- window->magic = SCIFEP_MAGIC;
- window->nr_pages = nr_pages;
-
- window->dma_addr = scif_zalloc(nr_pages * sizeof(*window->dma_addr));
- if (!window->dma_addr)
- goto error_window;
-
- window->num_pages = scif_zalloc(nr_pages *
- sizeof(*window->num_pages));
- if (!window->num_pages)
- goto error_window;
-
- if (scif_create_remote_lookup(scifdev, window))
- goto error_window;
-
- window->type = SCIF_WINDOW_PEER;
- window->unreg_state = OP_IDLE;
- INIT_LIST_HEAD(&window->list);
- return window;
-error_window:
- scif_destroy_remote_window(window);
-error_ret:
- return NULL;
-}
-
-/**
- * scif_destroy_remote_window:
- * @window: remote registration window
- *
- * Deallocate resources for remote window.
- */
-void
-scif_destroy_remote_window(struct scif_window *window)
-{
- scif_free(window->dma_addr, window->nr_pages *
- sizeof(*window->dma_addr));
- scif_free(window->num_pages, window->nr_pages *
- sizeof(*window->num_pages));
- window->magic = 0;
- scif_free(window, sizeof(*window));
-}
-
-/**
- * scif_iommu_map: create DMA mappings if the IOMMU is enabled
- * @remote_dev: SCIF remote device
- * @window: remote registration window
- *
- * Map the physical pages using dma_map_sg(..) and then detect the number
- * of contiguous DMA mappings allocated
- */
-static int scif_iommu_map(struct scif_dev *remote_dev,
- struct scif_window *window)
-{
- struct scatterlist *sg;
- int i, err;
- scif_pinned_pages_t pin = window->pinned_pages;
-
- window->st = kzalloc(sizeof(*window->st), GFP_KERNEL);
- if (!window->st)
- return -ENOMEM;
-
- err = sg_alloc_table(window->st, window->nr_pages, GFP_KERNEL);
- if (err)
- return err;
-
- for_each_sg(window->st->sgl, sg, window->st->nents, i)
- sg_set_page(sg, pin->pages[i], PAGE_SIZE, 0x0);
-
- err = dma_map_sg(&remote_dev->sdev->dev, window->st->sgl,
- window->st->nents, DMA_BIDIRECTIONAL);
- if (!err)
- return -ENOMEM;
- /* Detect contiguous ranges of DMA mappings */
- sg = window->st->sgl;
- for (i = 0; sg; i++) {
- dma_addr_t last_da;
-
- window->dma_addr[i] = sg_dma_address(sg);
- window->num_pages[i] = sg_dma_len(sg) >> PAGE_SHIFT;
- last_da = sg_dma_address(sg) + sg_dma_len(sg);
- while ((sg = sg_next(sg)) && sg_dma_address(sg) == last_da) {
- window->num_pages[i] +=
- (sg_dma_len(sg) >> PAGE_SHIFT);
- last_da = window->dma_addr[i] +
- sg_dma_len(sg);
- }
- window->nr_contig_chunks++;
- }
- return 0;
-}
-
-/**
- * scif_map_window:
- * @remote_dev: SCIF remote device
- * @window: self registration window
- *
- * Map pages of a window into the aperture/PCI.
- * Also determine addresses required for DMA.
- */
-int
-scif_map_window(struct scif_dev *remote_dev, struct scif_window *window)
-{
- int i, j, k, err = 0, nr_contig_pages;
- scif_pinned_pages_t pin;
- phys_addr_t phys_prev, phys_curr;
-
- might_sleep();
-
- pin = window->pinned_pages;
-
- if (intel_iommu_enabled && !scifdev_self(remote_dev))
- return scif_iommu_map(remote_dev, window);
-
- for (i = 0, j = 0; i < window->nr_pages; i += nr_contig_pages, j++) {
- phys_prev = page_to_phys(pin->pages[i]);
- nr_contig_pages = 1;
-
- /* Detect physically contiguous chunks */
- for (k = i + 1; k < window->nr_pages; k++) {
- phys_curr = page_to_phys(pin->pages[k]);
- if (phys_curr != (phys_prev + PAGE_SIZE))
- break;
- phys_prev = phys_curr;
- nr_contig_pages++;
- }
- window->num_pages[j] = nr_contig_pages;
- window->nr_contig_chunks++;
- if (scif_is_mgmt_node()) {
- /*
- * Management node has to deal with SMPT on X100 and
- * hence the DMA mapping is required
- */
- err = scif_map_single(&window->dma_addr[j],
- phys_to_virt(page_to_phys(
- pin->pages[i])),
- remote_dev,
- nr_contig_pages << PAGE_SHIFT);
- if (err)
- return err;
- } else {
- window->dma_addr[j] = page_to_phys(pin->pages[i]);
- }
- }
- return err;
-}
-
-/**
- * scif_send_scif_unregister:
- * @ep: end point
- * @window: self registration window
- *
- * Send a SCIF_UNREGISTER message.
- */
-static int scif_send_scif_unregister(struct scif_endpt *ep,
- struct scif_window *window)
-{
- struct scifmsg msg;
-
- msg.uop = SCIF_UNREGISTER;
- msg.src = ep->port;
- msg.payload[0] = window->alloc_handle.vaddr;
- msg.payload[1] = (u64)window;
- return scif_nodeqp_send(ep->remote_dev, &msg);
-}
-
-/**
- * scif_unregister_window:
- * @window: self registration window
- *
- * Send an unregistration request and wait for a response.
- */
-int scif_unregister_window(struct scif_window *window)
-{
- int err = 0;
- struct scif_endpt *ep = (struct scif_endpt *)window->ep;
- bool send_msg = false;
-
- might_sleep();
- switch (window->unreg_state) {
- case OP_IDLE:
- {
- window->unreg_state = OP_IN_PROGRESS;
- send_msg = true;
- }
- fallthrough;
- case OP_IN_PROGRESS:
- {
- scif_get_window(window, 1);
- mutex_unlock(&ep->rma_info.rma_lock);
- if (send_msg) {
- err = scif_send_scif_unregister(ep, window);
- if (err) {
- window->unreg_state = OP_COMPLETED;
- goto done;
- }
- } else {
- /* Return ENXIO since unregistration is in progress */
- mutex_lock(&ep->rma_info.rma_lock);
- return -ENXIO;
- }
-retry:
- /* Wait for a SCIF_UNREGISTER_(N)ACK message */
- err = wait_event_timeout(window->unregwq,
- window->unreg_state != OP_IN_PROGRESS,
- SCIF_NODE_ALIVE_TIMEOUT);
- if (!err && scifdev_alive(ep))
- goto retry;
- if (!err) {
- err = -ENODEV;
- window->unreg_state = OP_COMPLETED;
- dev_err(scif_info.mdev.this_device,
- "%s %d err %d\n", __func__, __LINE__, err);
- }
- if (err > 0)
- err = 0;
-done:
- mutex_lock(&ep->rma_info.rma_lock);
- scif_put_window(window, 1);
- break;
- }
- case OP_FAILED:
- {
- if (!scifdev_alive(ep)) {
- err = -ENODEV;
- window->unreg_state = OP_COMPLETED;
- }
- break;
- }
- case OP_COMPLETED:
- break;
- default:
- err = -ENODEV;
- }
-
- if (window->unreg_state == OP_COMPLETED && window->ref_count)
- scif_put_window(window, window->nr_pages);
-
- if (!window->ref_count) {
- atomic_inc(&ep->rma_info.tw_refcount);
- list_del_init(&window->list);
- scif_free_window_offset(ep, window, window->offset);
- mutex_unlock(&ep->rma_info.rma_lock);
- if ((!!(window->pinned_pages->map_flags & SCIF_MAP_KERNEL)) &&
- scifdev_alive(ep)) {
- scif_drain_dma_intr(ep->remote_dev->sdev,
- ep->rma_info.dma_chan);
- } else {
- if (!__scif_dec_pinned_vm_lock(window->mm,
- window->nr_pages)) {
- __scif_release_mm(window->mm);
- window->mm = NULL;
- }
- }
- scif_queue_for_cleanup(window, &scif_info.rma);
- mutex_lock(&ep->rma_info.rma_lock);
- }
- return err;
-}
-
-/**
- * scif_send_alloc_request:
- * @ep: end point
- * @window: self registration window
- *
- * Send a remote window allocation request
- */
-static int scif_send_alloc_request(struct scif_endpt *ep,
- struct scif_window *window)
-{
- struct scifmsg msg;
- struct scif_allocmsg *alloc = &window->alloc_handle;
-
- /* Set up the Alloc Handle */
- alloc->state = OP_IN_PROGRESS;
- init_waitqueue_head(&alloc->allocwq);
-
- /* Send out an allocation request */
- msg.uop = SCIF_ALLOC_REQ;
- msg.payload[1] = window->nr_pages;
- msg.payload[2] = (u64)&window->alloc_handle;
- return _scif_nodeqp_send(ep->remote_dev, &msg);
-}
-
-/**
- * scif_prep_remote_window:
- * @ep: end point
- * @window: self registration window
- *
- * Send a remote window allocation request, wait for an allocation response,
- * and prepares the remote window by copying over the page lists
- */
-static int scif_prep_remote_window(struct scif_endpt *ep,
- struct scif_window *window)
-{
- struct scifmsg msg;
- struct scif_window *remote_window;
- struct scif_allocmsg *alloc = &window->alloc_handle;
- dma_addr_t *dma_phys_lookup, *tmp, *num_pages_lookup, *tmp1;
- int i = 0, j = 0;
- int nr_contig_chunks, loop_nr_contig_chunks;
- int remaining_nr_contig_chunks, nr_lookup;
- int err, map_err;
-
- map_err = scif_map_window(ep->remote_dev, window);
- if (map_err)
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d map_err %d\n", __func__, __LINE__, map_err);
- remaining_nr_contig_chunks = window->nr_contig_chunks;
- nr_contig_chunks = window->nr_contig_chunks;
-retry:
- /* Wait for a SCIF_ALLOC_GNT/REJ message */
- err = wait_event_timeout(alloc->allocwq,
- alloc->state != OP_IN_PROGRESS,
- SCIF_NODE_ALIVE_TIMEOUT);
- mutex_lock(&ep->rma_info.rma_lock);
- /* Synchronize with the thread waking up allocwq */
- mutex_unlock(&ep->rma_info.rma_lock);
- if (!err && scifdev_alive(ep))
- goto retry;
-
- if (!err)
- err = -ENODEV;
-
- if (err > 0)
- err = 0;
- else
- return err;
-
- /* Bail out. The remote end rejected this request */
- if (alloc->state == OP_FAILED)
- return -ENOMEM;
-
- if (map_err) {
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %d\n", __func__, __LINE__, map_err);
- msg.uop = SCIF_FREE_VIRT;
- msg.src = ep->port;
- msg.payload[0] = ep->remote_ep;
- msg.payload[1] = window->alloc_handle.vaddr;
- msg.payload[2] = (u64)window;
- msg.payload[3] = SCIF_REGISTER;
- spin_lock(&ep->lock);
- if (ep->state == SCIFEP_CONNECTED)
- err = _scif_nodeqp_send(ep->remote_dev, &msg);
- else
- err = -ENOTCONN;
- spin_unlock(&ep->lock);
- return err;
- }
-
- remote_window = scif_ioremap(alloc->phys_addr, sizeof(*window),
- ep->remote_dev);
-
- /* Compute the number of lookup entries. 21 == 2MB Shift */
- nr_lookup = ALIGN(nr_contig_chunks, SCIF_NR_ADDR_IN_PAGE)
- >> ilog2(SCIF_NR_ADDR_IN_PAGE);
-
- dma_phys_lookup =
- scif_ioremap(remote_window->dma_addr_lookup.offset,
- nr_lookup *
- sizeof(*remote_window->dma_addr_lookup.lookup),
- ep->remote_dev);
- num_pages_lookup =
- scif_ioremap(remote_window->num_pages_lookup.offset,
- nr_lookup *
- sizeof(*remote_window->num_pages_lookup.lookup),
- ep->remote_dev);
-
- while (remaining_nr_contig_chunks) {
- loop_nr_contig_chunks = min_t(int, remaining_nr_contig_chunks,
- (int)SCIF_NR_ADDR_IN_PAGE);
- /* #1/2 - Copy physical addresses over to the remote side */
-
- /* #2/2 - Copy DMA addresses (addresses that are fed into the
- * DMA engine) We transfer bus addresses which are then
- * converted into a MIC physical address on the remote
- * side if it is a MIC, if the remote node is a mgmt node we
- * transfer the MIC physical address
- */
- tmp = scif_ioremap(dma_phys_lookup[j],
- loop_nr_contig_chunks *
- sizeof(*window->dma_addr),
- ep->remote_dev);
- tmp1 = scif_ioremap(num_pages_lookup[j],
- loop_nr_contig_chunks *
- sizeof(*window->num_pages),
- ep->remote_dev);
- if (scif_is_mgmt_node()) {
- memcpy_toio((void __force __iomem *)tmp,
- &window->dma_addr[i], loop_nr_contig_chunks
- * sizeof(*window->dma_addr));
- memcpy_toio((void __force __iomem *)tmp1,
- &window->num_pages[i], loop_nr_contig_chunks
- * sizeof(*window->num_pages));
- } else {
- if (scifdev_is_p2p(ep->remote_dev)) {
- /*
- * add remote node's base address for this node
- * to convert it into a MIC address
- */
- int m;
- dma_addr_t dma_addr;
-
- for (m = 0; m < loop_nr_contig_chunks; m++) {
- dma_addr = window->dma_addr[i + m] +
- ep->remote_dev->base_addr;
- writeq(dma_addr,
- (void __force __iomem *)&tmp[m]);
- }
- memcpy_toio((void __force __iomem *)tmp1,
- &window->num_pages[i],
- loop_nr_contig_chunks
- * sizeof(*window->num_pages));
- } else {
- /* Mgmt node or loopback - transfer DMA
- * addresses as is, this is the same as a
- * MIC physical address (we use the dma_addr
- * and not the phys_addr array since the
- * phys_addr is only setup if there is a mmap()
- * request from the mgmt node)
- */
- memcpy_toio((void __force __iomem *)tmp,
- &window->dma_addr[i],
- loop_nr_contig_chunks *
- sizeof(*window->dma_addr));
- memcpy_toio((void __force __iomem *)tmp1,
- &window->num_pages[i],
- loop_nr_contig_chunks *
- sizeof(*window->num_pages));
- }
- }
- remaining_nr_contig_chunks -= loop_nr_contig_chunks;
- i += loop_nr_contig_chunks;
- j++;
- scif_iounmap(tmp, loop_nr_contig_chunks *
- sizeof(*window->dma_addr), ep->remote_dev);
- scif_iounmap(tmp1, loop_nr_contig_chunks *
- sizeof(*window->num_pages), ep->remote_dev);
- }
-
- /* Prepare the remote window for the peer */
- remote_window->peer_window = (u64)window;
- remote_window->offset = window->offset;
- remote_window->prot = window->prot;
- remote_window->nr_contig_chunks = nr_contig_chunks;
- remote_window->ep = ep->remote_ep;
- scif_iounmap(num_pages_lookup,
- nr_lookup *
- sizeof(*remote_window->num_pages_lookup.lookup),
- ep->remote_dev);
- scif_iounmap(dma_phys_lookup,
- nr_lookup *
- sizeof(*remote_window->dma_addr_lookup.lookup),
- ep->remote_dev);
- scif_iounmap(remote_window, sizeof(*remote_window), ep->remote_dev);
- window->peer_window = alloc->vaddr;
- return err;
-}
-
-/**
- * scif_send_scif_register:
- * @ep: end point
- * @window: self registration window
- *
- * Send a SCIF_REGISTER message if EP is connected and wait for a
- * SCIF_REGISTER_(N)ACK message else send a SCIF_FREE_VIRT
- * message so that the peer can free its remote window allocated earlier.
- */
-static int scif_send_scif_register(struct scif_endpt *ep,
- struct scif_window *window)
-{
- int err = 0;
- struct scifmsg msg;
-
- msg.src = ep->port;
- msg.payload[0] = ep->remote_ep;
- msg.payload[1] = window->alloc_handle.vaddr;
- msg.payload[2] = (u64)window;
- spin_lock(&ep->lock);
- if (ep->state == SCIFEP_CONNECTED) {
- msg.uop = SCIF_REGISTER;
- window->reg_state = OP_IN_PROGRESS;
- err = _scif_nodeqp_send(ep->remote_dev, &msg);
- spin_unlock(&ep->lock);
- if (!err) {
-retry:
- /* Wait for a SCIF_REGISTER_(N)ACK message */
- err = wait_event_timeout(window->regwq,
- window->reg_state !=
- OP_IN_PROGRESS,
- SCIF_NODE_ALIVE_TIMEOUT);
- if (!err && scifdev_alive(ep))
- goto retry;
- err = !err ? -ENODEV : 0;
- if (window->reg_state == OP_FAILED)
- err = -ENOTCONN;
- }
- } else {
- msg.uop = SCIF_FREE_VIRT;
- msg.payload[3] = SCIF_REGISTER;
- err = _scif_nodeqp_send(ep->remote_dev, &msg);
- spin_unlock(&ep->lock);
- if (!err)
- err = -ENOTCONN;
- }
- return err;
-}
-
-/**
- * scif_get_window_offset:
- * @ep: end point descriptor
- * @flags: flags
- * @offset: offset hint
- * @num_pages: number of pages
- * @out_offset: computed offset returned by reference.
- *
- * Compute/Claim a new offset for this EP.
- */
-int scif_get_window_offset(struct scif_endpt *ep, int flags, s64 offset,
- int num_pages, s64 *out_offset)
-{
- s64 page_index;
- struct iova *iova_ptr;
- int err = 0;
-
- if (flags & SCIF_MAP_FIXED) {
- page_index = SCIF_IOVA_PFN(offset);
- iova_ptr = reserve_iova(&ep->rma_info.iovad, page_index,
- page_index + num_pages - 1);
- if (!iova_ptr)
- err = -EADDRINUSE;
- } else {
- iova_ptr = alloc_iova(&ep->rma_info.iovad, num_pages,
- SCIF_DMA_63BIT_PFN - 1, 0);
- if (!iova_ptr)
- err = -ENOMEM;
- }
- if (!err)
- *out_offset = (iova_ptr->pfn_lo) << PAGE_SHIFT;
- return err;
-}
-
-/**
- * scif_free_window_offset:
- * @ep: end point descriptor
- * @window: registration window
- * @offset: Offset to be freed
- *
- * Free offset for this EP. The callee is supposed to grab
- * the RMA mutex before calling this API.
- */
-void scif_free_window_offset(struct scif_endpt *ep,
- struct scif_window *window, s64 offset)
-{
- if ((window && !window->offset_freed) || !window) {
- free_iova(&ep->rma_info.iovad, offset >> PAGE_SHIFT);
- if (window)
- window->offset_freed = true;
- }
-}
-
-/**
- * scif_alloc_req: Respond to SCIF_ALLOC_REQ interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * Remote side is requesting a memory allocation.
- */
-void scif_alloc_req(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- int err;
- struct scif_window *window = NULL;
- int nr_pages = msg->payload[1];
-
- window = scif_create_remote_window(scifdev, nr_pages);
- if (!window) {
- err = -ENOMEM;
- goto error;
- }
-
- /* The peer's allocation request is granted */
- msg->uop = SCIF_ALLOC_GNT;
- msg->payload[0] = (u64)window;
- msg->payload[1] = window->mapped_offset;
- err = scif_nodeqp_send(scifdev, msg);
- if (err)
- scif_destroy_remote_window(window);
- return;
-error:
- /* The peer's allocation request is rejected */
- dev_err(&scifdev->sdev->dev,
- "%s %d error %d alloc_ptr %p nr_pages 0x%x\n",
- __func__, __LINE__, err, window, nr_pages);
- msg->uop = SCIF_ALLOC_REJ;
- scif_nodeqp_send(scifdev, msg);
-}
-
-/**
- * scif_alloc_gnt_rej: Respond to SCIF_ALLOC_GNT/REJ interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * Remote side responded to a memory allocation.
- */
-void scif_alloc_gnt_rej(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_allocmsg *handle = (struct scif_allocmsg *)msg->payload[2];
- struct scif_window *window = container_of(handle, struct scif_window,
- alloc_handle);
- struct scif_endpt *ep = (struct scif_endpt *)window->ep;
-
- mutex_lock(&ep->rma_info.rma_lock);
- handle->vaddr = msg->payload[0];
- handle->phys_addr = msg->payload[1];
- if (msg->uop == SCIF_ALLOC_GNT)
- handle->state = OP_COMPLETED;
- else
- handle->state = OP_FAILED;
- wake_up(&handle->allocwq);
- mutex_unlock(&ep->rma_info.rma_lock);
-}
-
-/**
- * scif_free_virt: Respond to SCIF_FREE_VIRT interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * Free up memory kmalloc'd earlier.
- */
-void scif_free_virt(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_window *window = (struct scif_window *)msg->payload[1];
-
- scif_destroy_remote_window(window);
-}
-
-static void
-scif_fixup_aper_base(struct scif_dev *dev, struct scif_window *window)
-{
- int j;
- struct scif_hw_dev *sdev = dev->sdev;
- phys_addr_t apt_base = 0;
-
- /*
- * Add the aperture base if the DMA address is not card relative
- * since the DMA addresses need to be an offset into the bar
- */
- if (!scifdev_self(dev) && window->type == SCIF_WINDOW_PEER &&
- sdev->aper && !sdev->card_rel_da)
- apt_base = sdev->aper->pa;
- else
- return;
-
- for (j = 0; j < window->nr_contig_chunks; j++) {
- if (window->num_pages[j])
- window->dma_addr[j] += apt_base;
- else
- break;
- }
-}
-
-/**
- * scif_recv_reg: Respond to SCIF_REGISTER interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * Update remote window list with a new registered window.
- */
-void scif_recv_reg(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_endpt *ep = (struct scif_endpt *)msg->payload[0];
- struct scif_window *window =
- (struct scif_window *)msg->payload[1];
-
- mutex_lock(&ep->rma_info.rma_lock);
- spin_lock(&ep->lock);
- if (ep->state == SCIFEP_CONNECTED) {
- msg->uop = SCIF_REGISTER_ACK;
- scif_nodeqp_send(ep->remote_dev, msg);
- scif_fixup_aper_base(ep->remote_dev, window);
- /* No further failures expected. Insert new window */
- scif_insert_window(window, &ep->rma_info.remote_reg_list);
- } else {
- msg->uop = SCIF_REGISTER_NACK;
- scif_nodeqp_send(ep->remote_dev, msg);
- }
- spin_unlock(&ep->lock);
- mutex_unlock(&ep->rma_info.rma_lock);
- /* free up any lookup resources now that page lists are transferred */
- scif_destroy_remote_lookup(ep->remote_dev, window);
- /*
- * We could not insert the window but we need to
- * destroy the window.
- */
- if (msg->uop == SCIF_REGISTER_NACK)
- scif_destroy_remote_window(window);
-}
-
-/**
- * scif_recv_unreg: Respond to SCIF_UNREGISTER interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * Remove window from remote registration list;
- */
-void scif_recv_unreg(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_rma_req req;
- struct scif_window *window = NULL;
- struct scif_window *recv_window =
- (struct scif_window *)msg->payload[0];
- struct scif_endpt *ep;
- int del_window = 0;
-
- ep = (struct scif_endpt *)recv_window->ep;
- req.out_window = &window;
- req.offset = recv_window->offset;
- req.prot = 0;
- req.nr_bytes = recv_window->nr_pages << PAGE_SHIFT;
- req.type = SCIF_WINDOW_FULL;
- req.head = &ep->rma_info.remote_reg_list;
- msg->payload[0] = ep->remote_ep;
-
- mutex_lock(&ep->rma_info.rma_lock);
- /* Does a valid window exist? */
- if (scif_query_window(&req)) {
- dev_err(&scifdev->sdev->dev,
- "%s %d -ENXIO\n", __func__, __LINE__);
- msg->uop = SCIF_UNREGISTER_ACK;
- goto error;
- }
- if (window) {
- if (window->ref_count)
- scif_put_window(window, window->nr_pages);
- else
- dev_err(&scifdev->sdev->dev,
- "%s %d ref count should be +ve\n",
- __func__, __LINE__);
- window->unreg_state = OP_COMPLETED;
- if (!window->ref_count) {
- msg->uop = SCIF_UNREGISTER_ACK;
- atomic_inc(&ep->rma_info.tw_refcount);
- ep->rma_info.async_list_del = 1;
- list_del_init(&window->list);
- del_window = 1;
- } else {
- /* NACK! There are valid references to this window */
- msg->uop = SCIF_UNREGISTER_NACK;
- }
- } else {
- /* The window did not make its way to the list at all. ACK */
- msg->uop = SCIF_UNREGISTER_ACK;
- scif_destroy_remote_window(recv_window);
- }
-error:
- mutex_unlock(&ep->rma_info.rma_lock);
- if (del_window)
- scif_drain_dma_intr(ep->remote_dev->sdev,
- ep->rma_info.dma_chan);
- scif_nodeqp_send(ep->remote_dev, msg);
- if (del_window)
- scif_queue_for_cleanup(window, &scif_info.rma);
-}
-
-/**
- * scif_recv_reg_ack: Respond to SCIF_REGISTER_ACK interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * Wake up the window waiting to complete registration.
- */
-void scif_recv_reg_ack(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_window *window =
- (struct scif_window *)msg->payload[2];
- struct scif_endpt *ep = (struct scif_endpt *)window->ep;
-
- mutex_lock(&ep->rma_info.rma_lock);
- window->reg_state = OP_COMPLETED;
- wake_up(&window->regwq);
- mutex_unlock(&ep->rma_info.rma_lock);
-}
-
-/**
- * scif_recv_reg_nack: Respond to SCIF_REGISTER_NACK interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * Wake up the window waiting to inform it that registration
- * cannot be completed.
- */
-void scif_recv_reg_nack(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_window *window =
- (struct scif_window *)msg->payload[2];
- struct scif_endpt *ep = (struct scif_endpt *)window->ep;
-
- mutex_lock(&ep->rma_info.rma_lock);
- window->reg_state = OP_FAILED;
- wake_up(&window->regwq);
- mutex_unlock(&ep->rma_info.rma_lock);
-}
-
-/**
- * scif_recv_unreg_ack: Respond to SCIF_UNREGISTER_ACK interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * Wake up the window waiting to complete unregistration.
- */
-void scif_recv_unreg_ack(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_window *window =
- (struct scif_window *)msg->payload[1];
- struct scif_endpt *ep = (struct scif_endpt *)window->ep;
-
- mutex_lock(&ep->rma_info.rma_lock);
- window->unreg_state = OP_COMPLETED;
- wake_up(&window->unregwq);
- mutex_unlock(&ep->rma_info.rma_lock);
-}
-
-/**
- * scif_recv_unreg_nack: Respond to SCIF_UNREGISTER_NACK interrupt message
- * @scifdev: SCIF device
- * @msg: Interrupt message
- *
- * Wake up the window waiting to inform it that unregistration
- * cannot be completed immediately.
- */
-void scif_recv_unreg_nack(struct scif_dev *scifdev, struct scifmsg *msg)
-{
- struct scif_window *window =
- (struct scif_window *)msg->payload[1];
- struct scif_endpt *ep = (struct scif_endpt *)window->ep;
-
- mutex_lock(&ep->rma_info.rma_lock);
- window->unreg_state = OP_FAILED;
- wake_up(&window->unregwq);
- mutex_unlock(&ep->rma_info.rma_lock);
-}
-
-int __scif_pin_pages(void *addr, size_t len, int *out_prot,
- int map_flags, scif_pinned_pages_t *pages)
-{
- struct scif_pinned_pages *pinned_pages;
- int nr_pages, err = 0, i;
- bool vmalloc_addr = false;
- bool try_upgrade = false;
- int prot = *out_prot;
- int ulimit = 0;
- struct mm_struct *mm = NULL;
-
- /* Unsupported flags */
- if (map_flags & ~(SCIF_MAP_KERNEL | SCIF_MAP_ULIMIT))
- return -EINVAL;
- ulimit = !!(map_flags & SCIF_MAP_ULIMIT);
-
- /* Unsupported protection requested */
- if (prot & ~(SCIF_PROT_READ | SCIF_PROT_WRITE))
- return -EINVAL;
-
- /* addr/len must be page aligned. len should be non zero */
- if (!len ||
- (ALIGN((u64)addr, PAGE_SIZE) != (u64)addr) ||
- (ALIGN((u64)len, PAGE_SIZE) != (u64)len))
- return -EINVAL;
-
- might_sleep();
-
- nr_pages = len >> PAGE_SHIFT;
-
- /* Allocate a set of pinned pages */
- pinned_pages = scif_create_pinned_pages(nr_pages, prot);
- if (!pinned_pages)
- return -ENOMEM;
-
- if (map_flags & SCIF_MAP_KERNEL) {
- if (is_vmalloc_addr(addr))
- vmalloc_addr = true;
-
- for (i = 0; i < nr_pages; i++) {
- if (vmalloc_addr)
- pinned_pages->pages[i] =
- vmalloc_to_page(addr + (i * PAGE_SIZE));
- else
- pinned_pages->pages[i] =
- virt_to_page(addr + (i * PAGE_SIZE));
- }
- pinned_pages->nr_pages = nr_pages;
- pinned_pages->map_flags = SCIF_MAP_KERNEL;
- } else {
- /*
- * SCIF supports registration caching. If a registration has
- * been requested with read only permissions, then we try
- * to pin the pages with RW permissions so that a subsequent
- * transfer with RW permission can hit the cache instead of
- * invalidating it. If the upgrade fails with RW then we
- * revert back to R permission and retry
- */
- if (prot == SCIF_PROT_READ)
- try_upgrade = true;
- prot |= SCIF_PROT_WRITE;
-retry:
- mm = current->mm;
- if (ulimit) {
- err = __scif_check_inc_pinned_vm(mm, nr_pages);
- if (err) {
- pinned_pages->nr_pages = 0;
- goto error_unmap;
- }
- }
-
- pinned_pages->nr_pages = pin_user_pages_fast(
- (u64)addr,
- nr_pages,
- (prot & SCIF_PROT_WRITE) ? FOLL_WRITE : 0,
- pinned_pages->pages);
- if (nr_pages != pinned_pages->nr_pages) {
- if (pinned_pages->nr_pages < 0)
- pinned_pages->nr_pages = 0;
- if (try_upgrade) {
- if (ulimit)
- __scif_dec_pinned_vm_lock(mm, nr_pages);
- /* Roll back any pinned pages */
- unpin_user_pages(pinned_pages->pages,
- pinned_pages->nr_pages);
- prot &= ~SCIF_PROT_WRITE;
- try_upgrade = false;
- goto retry;
- }
- }
- pinned_pages->map_flags = 0;
- }
-
- if (pinned_pages->nr_pages < nr_pages) {
- err = -EFAULT;
- goto dec_pinned;
- }
-
- *out_prot = prot;
- atomic_set(&pinned_pages->ref_count, 1);
- *pages = pinned_pages;
- return err;
-dec_pinned:
- if (ulimit)
- __scif_dec_pinned_vm_lock(mm, nr_pages);
- /* Something went wrong! Rollback */
-error_unmap:
- scif_destroy_pinned_pages(pinned_pages);
- *pages = NULL;
- dev_dbg(scif_info.mdev.this_device,
- "%s %d err %d len 0x%lx\n", __func__, __LINE__, err, len);
- return err;
-}
-
-int scif_pin_pages(void *addr, size_t len, int prot,
- int map_flags, scif_pinned_pages_t *pages)
-{
- return __scif_pin_pages(addr, len, &prot, map_flags, pages);
-}
-EXPORT_SYMBOL_GPL(scif_pin_pages);
-
-int scif_unpin_pages(scif_pinned_pages_t pinned_pages)
-{
- int err = 0, ret;
-
- if (!pinned_pages || SCIFEP_MAGIC != pinned_pages->magic)
- return -EINVAL;
-
- ret = atomic_sub_return(1, &pinned_pages->ref_count);
- if (ret < 0) {
- dev_err(scif_info.mdev.this_device,
- "%s %d scif_unpin_pages called without pinning? rc %d\n",
- __func__, __LINE__, ret);
- return -EINVAL;
- }
- /*
- * Destroy the window if the ref count for this set of pinned
- * pages has dropped to zero. If it is positive then there is
- * a valid registered window which is backed by these pages and
- * it will be destroyed once all such windows are unregistered.
- */
- if (!ret)
- err = scif_destroy_pinned_pages(pinned_pages);
-
- return err;
-}
-EXPORT_SYMBOL_GPL(scif_unpin_pages);
-
-static inline void
-scif_insert_local_window(struct scif_window *window, struct scif_endpt *ep)
-{
- mutex_lock(&ep->rma_info.rma_lock);
- scif_insert_window(window, &ep->rma_info.reg_list);
- mutex_unlock(&ep->rma_info.rma_lock);
-}
-
-off_t scif_register_pinned_pages(scif_epd_t epd,
- scif_pinned_pages_t pinned_pages,
- off_t offset, int map_flags)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- s64 computed_offset;
- struct scif_window *window;
- int err;
- size_t len;
- struct device *spdev;
-
- /* Unsupported flags */
- if (map_flags & ~SCIF_MAP_FIXED)
- return -EINVAL;
-
- len = pinned_pages->nr_pages << PAGE_SHIFT;
-
- /*
- * Offset is not page aligned/negative or offset+len
- * wraps around with SCIF_MAP_FIXED.
- */
- if ((map_flags & SCIF_MAP_FIXED) &&
- ((ALIGN(offset, PAGE_SIZE) != offset) ||
- (offset < 0) ||
- (len > LONG_MAX - offset)))
- return -EINVAL;
-
- might_sleep();
-
- err = scif_verify_epd(ep);
- if (err)
- return err;
- /*
- * It is an error to pass pinned_pages to scif_register_pinned_pages()
- * after calling scif_unpin_pages().
- */
- if (!atomic_add_unless(&pinned_pages->ref_count, 1, 0))
- return -EINVAL;
-
- /* Compute the offset for this registration */
- err = scif_get_window_offset(ep, map_flags, offset,
- len, &computed_offset);
- if (err) {
- atomic_sub(1, &pinned_pages->ref_count);
- return err;
- }
-
- /* Allocate and prepare self registration window */
- window = scif_create_window(ep, pinned_pages->nr_pages,
- computed_offset, false);
- if (!window) {
- atomic_sub(1, &pinned_pages->ref_count);
- scif_free_window_offset(ep, NULL, computed_offset);
- return -ENOMEM;
- }
-
- window->pinned_pages = pinned_pages;
- window->nr_pages = pinned_pages->nr_pages;
- window->prot = pinned_pages->prot;
-
- spdev = scif_get_peer_dev(ep->remote_dev);
- if (IS_ERR(spdev)) {
- err = PTR_ERR(spdev);
- scif_destroy_window(ep, window);
- return err;
- }
- err = scif_send_alloc_request(ep, window);
- if (err) {
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %d\n", __func__, __LINE__, err);
- goto error_unmap;
- }
-
- /* Prepare the remote registration window */
- err = scif_prep_remote_window(ep, window);
- if (err) {
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %d\n", __func__, __LINE__, err);
- goto error_unmap;
- }
-
- /* Tell the peer about the new window */
- err = scif_send_scif_register(ep, window);
- if (err) {
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %d\n", __func__, __LINE__, err);
- goto error_unmap;
- }
-
- scif_put_peer_dev(spdev);
- /* No further failures expected. Insert new window */
- scif_insert_local_window(window, ep);
- return computed_offset;
-error_unmap:
- scif_destroy_window(ep, window);
- scif_put_peer_dev(spdev);
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %d\n", __func__, __LINE__, err);
- return err;
-}
-EXPORT_SYMBOL_GPL(scif_register_pinned_pages);
-
-off_t scif_register(scif_epd_t epd, void *addr, size_t len, off_t offset,
- int prot, int map_flags)
-{
- scif_pinned_pages_t pinned_pages;
- off_t err;
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- s64 computed_offset;
- struct scif_window *window;
- struct mm_struct *mm = NULL;
- struct device *spdev;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI register: ep %p addr %p len 0x%lx offset 0x%lx prot 0x%x map_flags 0x%x\n",
- epd, addr, len, offset, prot, map_flags);
- /* Unsupported flags */
- if (map_flags & ~(SCIF_MAP_FIXED | SCIF_MAP_KERNEL))
- return -EINVAL;
-
- /*
- * Offset is not page aligned/negative or offset+len
- * wraps around with SCIF_MAP_FIXED.
- */
- if ((map_flags & SCIF_MAP_FIXED) &&
- ((ALIGN(offset, PAGE_SIZE) != offset) ||
- (offset < 0) ||
- (len > LONG_MAX - offset)))
- return -EINVAL;
-
- /* Unsupported protection requested */
- if (prot & ~(SCIF_PROT_READ | SCIF_PROT_WRITE))
- return -EINVAL;
-
- /* addr/len must be page aligned. len should be non zero */
- if (!len || (ALIGN((u64)addr, PAGE_SIZE) != (u64)addr) ||
- (ALIGN(len, PAGE_SIZE) != len))
- return -EINVAL;
-
- might_sleep();
-
- err = scif_verify_epd(ep);
- if (err)
- return err;
-
- /* Compute the offset for this registration */
- err = scif_get_window_offset(ep, map_flags, offset,
- len >> PAGE_SHIFT, &computed_offset);
- if (err)
- return err;
-
- spdev = scif_get_peer_dev(ep->remote_dev);
- if (IS_ERR(spdev)) {
- err = PTR_ERR(spdev);
- scif_free_window_offset(ep, NULL, computed_offset);
- return err;
- }
- /* Allocate and prepare self registration window */
- window = scif_create_window(ep, len >> PAGE_SHIFT,
- computed_offset, false);
- if (!window) {
- scif_free_window_offset(ep, NULL, computed_offset);
- scif_put_peer_dev(spdev);
- return -ENOMEM;
- }
-
- window->nr_pages = len >> PAGE_SHIFT;
-
- err = scif_send_alloc_request(ep, window);
- if (err) {
- scif_destroy_incomplete_window(ep, window);
- scif_put_peer_dev(spdev);
- return err;
- }
-
- if (!(map_flags & SCIF_MAP_KERNEL)) {
- mm = __scif_acquire_mm();
- map_flags |= SCIF_MAP_ULIMIT;
- }
- /* Pin down the pages */
- err = __scif_pin_pages(addr, len, &prot,
- map_flags & (SCIF_MAP_KERNEL | SCIF_MAP_ULIMIT),
- &pinned_pages);
- if (err) {
- scif_destroy_incomplete_window(ep, window);
- __scif_release_mm(mm);
- goto error;
- }
-
- window->pinned_pages = pinned_pages;
- window->prot = pinned_pages->prot;
- window->mm = mm;
-
- /* Prepare the remote registration window */
- err = scif_prep_remote_window(ep, window);
- if (err) {
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %ld\n", __func__, __LINE__, err);
- goto error_unmap;
- }
-
- /* Tell the peer about the new window */
- err = scif_send_scif_register(ep, window);
- if (err) {
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %ld\n", __func__, __LINE__, err);
- goto error_unmap;
- }
-
- scif_put_peer_dev(spdev);
- /* No further failures expected. Insert new window */
- scif_insert_local_window(window, ep);
- dev_dbg(&ep->remote_dev->sdev->dev,
- "SCIFAPI register: ep %p addr %p len 0x%lx computed_offset 0x%llx\n",
- epd, addr, len, computed_offset);
- return computed_offset;
-error_unmap:
- scif_destroy_window(ep, window);
-error:
- scif_put_peer_dev(spdev);
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %ld\n", __func__, __LINE__, err);
- return err;
-}
-EXPORT_SYMBOL_GPL(scif_register);
-
-int
-scif_unregister(scif_epd_t epd, off_t offset, size_t len)
-{
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- struct scif_window *window = NULL;
- struct scif_rma_req req;
- int nr_pages, err;
- struct device *spdev;
-
- dev_dbg(scif_info.mdev.this_device,
- "SCIFAPI unregister: ep %p offset 0x%lx len 0x%lx\n",
- ep, offset, len);
- /* len must be page aligned. len should be non zero */
- if (!len ||
- (ALIGN((u64)len, PAGE_SIZE) != (u64)len))
- return -EINVAL;
-
- /* Offset is not page aligned or offset+len wraps around */
- if ((ALIGN(offset, PAGE_SIZE) != offset) ||
- (offset < 0) ||
- (len > LONG_MAX - offset))
- return -EINVAL;
-
- err = scif_verify_epd(ep);
- if (err)
- return err;
-
- might_sleep();
- nr_pages = len >> PAGE_SHIFT;
-
- req.out_window = &window;
- req.offset = offset;
- req.prot = 0;
- req.nr_bytes = len;
- req.type = SCIF_WINDOW_FULL;
- req.head = &ep->rma_info.reg_list;
-
- spdev = scif_get_peer_dev(ep->remote_dev);
- if (IS_ERR(spdev)) {
- err = PTR_ERR(spdev);
- return err;
- }
- mutex_lock(&ep->rma_info.rma_lock);
- /* Does a valid window exist? */
- err = scif_query_window(&req);
- if (err) {
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %d\n", __func__, __LINE__, err);
- goto error;
- }
- /* Unregister all the windows in this range */
- err = scif_rma_list_unregister(window, offset, nr_pages);
- if (err)
- dev_err(&ep->remote_dev->sdev->dev,
- "%s %d err %d\n", __func__, __LINE__, err);
-error:
- mutex_unlock(&ep->rma_info.rma_lock);
- scif_put_peer_dev(spdev);
- return err;
-}
-EXPORT_SYMBOL_GPL(scif_unregister);
+++ /dev/null
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * This file is provided under a dual BSD/GPLv2 license. When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2015 Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * BSD LICENSE
- *
- * Copyright(c) 2015 Intel Corporation.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Intel SCIF driver.
- *
- */
-#ifndef SCIF_RMA_H
-#define SCIF_RMA_H
-
-#include <linux/intel-iommu.h>
-#include <linux/mmu_notifier.h>
-
-#include "../bus/scif_bus.h"
-
-/* If this bit is set then the mark is a remote fence mark */
-#define SCIF_REMOTE_FENCE_BIT 31
-/* Magic value used to indicate a remote fence request */
-#define SCIF_REMOTE_FENCE BIT_ULL(SCIF_REMOTE_FENCE_BIT)
-
-#define SCIF_MAX_UNALIGNED_BUF_SIZE (1024 * 1024ULL)
-#define SCIF_KMEM_UNALIGNED_BUF_SIZE (SCIF_MAX_UNALIGNED_BUF_SIZE + \
- (L1_CACHE_BYTES << 1))
-
-#define SCIF_IOVA_START_PFN (1)
-#define SCIF_IOVA_PFN(addr) ((addr) >> PAGE_SHIFT)
-#define SCIF_DMA_64BIT_PFN SCIF_IOVA_PFN(DMA_BIT_MASK(64))
-#define SCIF_DMA_63BIT_PFN SCIF_IOVA_PFN(DMA_BIT_MASK(63))
-
-/*
- * struct scif_endpt_rma_info - Per Endpoint Remote Memory Access Information
- *
- * @reg_list: List of registration windows for self
- * @remote_reg_list: List of registration windows for peer
- * @iovad: Offset generator
- * @rma_lock: Synchronizes access to self/remote list and also protects the
- * window from being destroyed while RMAs are in progress.
- * @tc_lock: Synchronizes access to temporary cached windows list
- * for SCIF Registration Caching.
- * @mmn_lock: Synchronizes access to the list of MMU notifiers registered
- * @tw_refcount: Keeps track of number of outstanding temporary registered
- * windows created by scif_vreadfrom/scif_vwriteto which have
- * not been destroyed.
- * @tcw_refcount: Same as tw_refcount but for temporary cached windows
- * @tcw_total_pages: Same as tcw_refcount but in terms of pages pinned
- * @mmn_list: MMU notifier so that we can destroy the windows when required
- * @fence_refcount: Keeps track of number of outstanding remote fence
- * requests which have been received by the peer.
- * @dma_chan: DMA channel used for all DMA transfers for this endpoint.
- * @async_list_del: Detect asynchronous list entry deletion
- * @vma_list: List of vmas with remote memory mappings
- * @markwq: Wait queue used for scif_fence_mark/scif_fence_wait
-*/
-struct scif_endpt_rma_info {
- struct list_head reg_list;
- struct list_head remote_reg_list;
- struct iova_domain iovad;
- struct mutex rma_lock;
- spinlock_t tc_lock;
- struct mutex mmn_lock;
- atomic_t tw_refcount;
- atomic_t tcw_refcount;
- atomic_t tcw_total_pages;
- struct list_head mmn_list;
- atomic_t fence_refcount;
- struct dma_chan *dma_chan;
- int async_list_del;
- struct list_head vma_list;
- wait_queue_head_t markwq;
-};
-
-/*
- * struct scif_fence_info - used for tracking fence requests
- *
- * @state: State of this transfer
- * @wq: Fences wait on this queue
- * @dma_mark: Used for storing the DMA mark
- */
-struct scif_fence_info {
- enum scif_msg_state state;
- struct completion comp;
- int dma_mark;
-};
-
-/*
- * struct scif_remote_fence_info - used for tracking remote fence requests
- *
- * @msg: List of SCIF node QP fence messages
- * @list: Link to list of remote fence requests
- */
-struct scif_remote_fence_info {
- struct scifmsg msg;
- struct list_head list;
-};
-
-/*
- * Specifies whether an RMA operation can span across partial windows, a single
- * window or multiple contiguous windows. Mmaps can span across partial windows.
- * Unregistration can span across complete windows. scif_get_pages() can span a
- * single window. A window can also be of type self or peer.
- */
-enum scif_window_type {
- SCIF_WINDOW_PARTIAL,
- SCIF_WINDOW_SINGLE,
- SCIF_WINDOW_FULL,
- SCIF_WINDOW_SELF,
- SCIF_WINDOW_PEER
-};
-
-/* The number of physical addresses that can be stored in a PAGE. */
-#define SCIF_NR_ADDR_IN_PAGE (0x1000 >> 3)
-
-/*
- * struct scif_rma_lookup - RMA lookup data structure for page list transfers
- *
- * Store an array of lookup offsets. Each offset in this array maps
- * one 4K page containing 512 physical addresses i.e. 2MB. 512 such
- * offsets in a 4K page will correspond to 1GB of registered address space.
-
- * @lookup: Array of offsets
- * @offset: DMA offset of lookup array
- */
-struct scif_rma_lookup {
- dma_addr_t *lookup;
- dma_addr_t offset;
-};
-
-/*
- * struct scif_pinned_pages - A set of pinned pages obtained with
- * scif_pin_pages() which could be part of multiple registered
- * windows across different end points.
- *
- * @nr_pages: Number of pages which is defined as a s64 instead of an int
- * to avoid sign extension with buffers >= 2GB
- * @prot: read/write protections
- * @map_flags: Flags specified during the pin operation
- * @ref_count: Reference count bumped in terms of number of pages
- * @magic: A magic value
- * @pages: Array of pointers to struct pages populated with get_user_pages(..)
- */
-struct scif_pinned_pages {
- s64 nr_pages;
- int prot;
- int map_flags;
- atomic_t ref_count;
- u64 magic;
- struct page **pages;
-};
-
-/*
- * struct scif_status - Stores DMA status update information
- *
- * @src_dma_addr: Source buffer DMA address
- * @val: src location for value to be written to the destination
- * @ep: SCIF endpoint
- */
-struct scif_status {
- dma_addr_t src_dma_addr;
- u64 val;
- struct scif_endpt *ep;
-};
-
-/*
- * struct scif_cb_arg - Stores the argument of the callback func
- *
- * @src_dma_addr: Source buffer DMA address
- * @status: DMA status
- * @ep: SCIF endpoint
- */
-struct scif_cb_arg {
- dma_addr_t src_dma_addr;
- struct scif_status *status;
- struct scif_endpt *ep;
-};
-
-/*
- * struct scif_window - Registration Window for Self and Remote
- *
- * @nr_pages: Number of pages which is defined as a s64 instead of an int
- * to avoid sign extension with buffers >= 2GB
- * @nr_contig_chunks: Number of contiguous physical chunks
- * @prot: read/write protections
- * @ref_count: reference count in terms of number of pages
- * @magic: Cookie to detect corruption
- * @offset: registered offset
- * @va_for_temp: va address that this window represents
- * @dma_mark: Used to determine if all DMAs against the window are done
- * @ep: Pointer to EP. Useful for passing EP around with messages to
- avoid expensive list traversals.
- * @list: link to list of windows for the endpoint
- * @type: self or peer window
- * @peer_window: Pointer to peer window. Useful for sending messages to peer
- * without requiring an extra list traversal
- * @unreg_state: unregistration state
- * @offset_freed: True if the offset has been freed
- * @temp: True for temporary windows created via scif_vreadfrom/scif_vwriteto
- * @mm: memory descriptor for the task_struct which initiated the RMA
- * @st: scatter gather table for DMA mappings with IOMMU enabled
- * @pinned_pages: The set of pinned_pages backing this window
- * @alloc_handle: Handle for sending ALLOC_REQ
- * @regwq: Wait Queue for an registration (N)ACK
- * @reg_state: Registration state
- * @unregwq: Wait Queue for an unregistration (N)ACK
- * @dma_addr_lookup: Lookup for physical addresses used for DMA
- * @nr_lookup: Number of entries in lookup
- * @mapped_offset: Offset used to map the window by the peer
- * @dma_addr: Array of physical addresses used for Mgmt node & MIC initiated DMA
- * @num_pages: Array specifying number of pages for each physical address
- */
-struct scif_window {
- s64 nr_pages;
- int nr_contig_chunks;
- int prot;
- int ref_count;
- u64 magic;
- s64 offset;
- unsigned long va_for_temp;
- int dma_mark;
- u64 ep;
- struct list_head list;
- enum scif_window_type type;
- u64 peer_window;
- enum scif_msg_state unreg_state;
- bool offset_freed;
- bool temp;
- struct mm_struct *mm;
- struct sg_table *st;
- union {
- struct {
- struct scif_pinned_pages *pinned_pages;
- struct scif_allocmsg alloc_handle;
- wait_queue_head_t regwq;
- enum scif_msg_state reg_state;
- wait_queue_head_t unregwq;
- };
- struct {
- struct scif_rma_lookup dma_addr_lookup;
- struct scif_rma_lookup num_pages_lookup;
- int nr_lookup;
- dma_addr_t mapped_offset;
- };
- };
- dma_addr_t *dma_addr;
- u64 *num_pages;
-} __packed;
-
-/*
- * scif_mmu_notif - SCIF mmu notifier information
- *
- * @mmu_notifier ep_mmu_notifier: MMU notifier operations
- * @tc_reg_list: List of temp registration windows for self
- * @mm: memory descriptor for the task_struct which initiated the RMA
- * @ep: SCIF endpoint
- * @list: link to list of MMU notifier information
- */
-struct scif_mmu_notif {
-#ifdef CONFIG_MMU_NOTIFIER
- struct mmu_notifier ep_mmu_notifier;
-#endif
- struct list_head tc_reg_list;
- struct mm_struct *mm;
- struct scif_endpt *ep;
- struct list_head list;
-};
-
-enum scif_rma_dir {
- SCIF_LOCAL_TO_REMOTE,
- SCIF_REMOTE_TO_LOCAL
-};
-
-extern struct kmem_cache *unaligned_cache;
-/* Initialize RMA for this EP */
-void scif_rma_ep_init(struct scif_endpt *ep);
-/* Check if epd can be uninitialized */
-int scif_rma_ep_can_uninit(struct scif_endpt *ep);
-/* Obtain a new offset. Callee must grab RMA lock */
-int scif_get_window_offset(struct scif_endpt *ep, int flags,
- s64 offset, int nr_pages, s64 *out_offset);
-/* Free offset. Callee must grab RMA lock */
-void scif_free_window_offset(struct scif_endpt *ep,
- struct scif_window *window, s64 offset);
-/* Create self registration window */
-struct scif_window *scif_create_window(struct scif_endpt *ep, int nr_pages,
- s64 offset, bool temp);
-/* Destroy self registration window.*/
-int scif_destroy_window(struct scif_endpt *ep, struct scif_window *window);
-void scif_unmap_window(struct scif_dev *remote_dev, struct scif_window *window);
-/* Map pages of self window to Aperture/PCI */
-int scif_map_window(struct scif_dev *remote_dev,
- struct scif_window *window);
-/* Unregister a self window */
-int scif_unregister_window(struct scif_window *window);
-/* Destroy remote registration window */
-void
-scif_destroy_remote_window(struct scif_window *window);
-/* remove valid remote memory mappings from process address space */
-void scif_zap_mmaps(int node);
-/* Query if any applications have remote memory mappings */
-bool scif_rma_do_apps_have_mmaps(int node);
-/* Cleanup remote registration lists for zombie endpoints */
-void scif_cleanup_rma_for_zombies(int node);
-/* Reserve a DMA channel for a particular endpoint */
-int scif_reserve_dma_chan(struct scif_endpt *ep);
-/* Setup a DMA mark for an endpoint */
-int _scif_fence_mark(scif_epd_t epd, int *mark);
-int scif_prog_signal(scif_epd_t epd, off_t offset, u64 val,
- enum scif_window_type type);
-void scif_alloc_req(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_alloc_gnt_rej(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_free_virt(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_recv_reg(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_recv_unreg(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_recv_reg_ack(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_recv_reg_nack(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_recv_unreg_ack(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_recv_unreg_nack(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_recv_munmap(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_recv_mark(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_recv_mark_resp(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_recv_wait(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_recv_wait_resp(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_recv_sig_local(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_recv_sig_remote(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_recv_sig_resp(struct scif_dev *scifdev, struct scifmsg *msg);
-void scif_mmu_notif_handler(struct work_struct *work);
-void scif_rma_handle_remote_fences(void);
-void scif_rma_destroy_windows(void);
-void scif_rma_destroy_tcw_invalid(void);
-int scif_drain_dma_intr(struct scif_hw_dev *sdev, struct dma_chan *chan);
-
-struct scif_window_iter {
- s64 offset;
- int index;
-};
-
-static inline void
-scif_init_window_iter(struct scif_window *window, struct scif_window_iter *iter)
-{
- iter->offset = window->offset;
- iter->index = 0;
-}
-
-dma_addr_t scif_off_to_dma_addr(struct scif_window *window, s64 off,
- size_t *nr_bytes,
- struct scif_window_iter *iter);
-static inline
-dma_addr_t __scif_off_to_dma_addr(struct scif_window *window, s64 off)
-{
- return scif_off_to_dma_addr(window, off, NULL, NULL);
-}
-
-static inline bool scif_unaligned(off_t src_offset, off_t dst_offset)
-{
- src_offset = src_offset & (L1_CACHE_BYTES - 1);
- dst_offset = dst_offset & (L1_CACHE_BYTES - 1);
- return !(src_offset == dst_offset);
-}
-
-/*
- * scif_zalloc:
- * @size: Size of the allocation request.
- *
- * Helper API which attempts to allocate zeroed pages via
- * __get_free_pages(..) first and then falls back on
- * vzalloc(..) if that fails.
- */
-static inline void *scif_zalloc(size_t size)
-{
- void *ret = NULL;
- size_t align = ALIGN(size, PAGE_SIZE);
-
- if (align && get_order(align) < MAX_ORDER)
- ret = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
- get_order(align));
- return ret ? ret : vzalloc(align);
-}
-
-/*
- * scif_free:
- * @addr: Address to be freed.
- * @size: Size of the allocation.
- * Helper API which frees memory allocated via scif_zalloc().
- */
-static inline void scif_free(void *addr, size_t size)
-{
- size_t align = ALIGN(size, PAGE_SIZE);
-
- if (is_vmalloc_addr(addr))
- vfree(addr);
- else
- free_pages((unsigned long)addr, get_order(align));
-}
-
-static inline void scif_get_window(struct scif_window *window, int nr_pages)
-{
- window->ref_count += nr_pages;
-}
-
-static inline void scif_put_window(struct scif_window *window, int nr_pages)
-{
- window->ref_count -= nr_pages;
-}
-
-static inline void scif_set_window_ref(struct scif_window *window, int nr_pages)
-{
- window->ref_count = nr_pages;
-}
-
-static inline void
-scif_queue_for_cleanup(struct scif_window *window, struct list_head *list)
-{
- spin_lock(&scif_info.rmalock);
- list_add_tail(&window->list, list);
- spin_unlock(&scif_info.rmalock);
- schedule_work(&scif_info.misc_work);
-}
-
-static inline void __scif_rma_destroy_tcw_helper(struct scif_window *window)
-{
- list_del_init(&window->list);
- scif_queue_for_cleanup(window, &scif_info.rma_tc);
-}
-
-static inline bool scif_is_iommu_enabled(void)
-{
-#ifdef CONFIG_INTEL_IOMMU
- return intel_iommu_enabled;
-#else
- return false;
-#endif
-}
-#endif /* SCIF_RMA_H */
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2015 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#include "scif_main.h"
-#include <linux/mmu_notifier.h>
-#include <linux/highmem.h>
-
-/*
- * scif_insert_tcw:
- *
- * Insert a temp window to the temp registration list sorted by va_for_temp.
- * RMA lock must be held.
- */
-void scif_insert_tcw(struct scif_window *window, struct list_head *head)
-{
- struct scif_window *curr = NULL;
- struct scif_window *prev = list_entry(head, struct scif_window, list);
- struct list_head *item;
-
- INIT_LIST_HEAD(&window->list);
- /* Compare with tail and if the entry is new tail add it to the end */
- if (!list_empty(head)) {
- curr = list_entry(head->prev, struct scif_window, list);
- if (curr->va_for_temp < window->va_for_temp) {
- list_add_tail(&window->list, head);
- return;
- }
- }
- list_for_each(item, head) {
- curr = list_entry(item, struct scif_window, list);
- if (curr->va_for_temp > window->va_for_temp)
- break;
- prev = curr;
- }
- list_add(&window->list, &prev->list);
-}
-
-/*
- * scif_insert_window:
- *
- * Insert a window to the self registration list sorted by offset.
- * RMA lock must be held.
- */
-void scif_insert_window(struct scif_window *window, struct list_head *head)
-{
- struct scif_window *curr = NULL, *prev = NULL;
- struct list_head *item;
-
- INIT_LIST_HEAD(&window->list);
- list_for_each(item, head) {
- curr = list_entry(item, struct scif_window, list);
- if (curr->offset > window->offset)
- break;
- prev = curr;
- }
- if (!prev)
- list_add(&window->list, head);
- else
- list_add(&window->list, &prev->list);
- scif_set_window_ref(window, window->nr_pages);
-}
-
-/*
- * scif_query_tcw:
- *
- * Query the temp cached registration list of ep for an overlapping window
- * in case of permission mismatch, destroy the previous window. if permissions
- * match and overlap is partial, destroy the window but return the new range
- * RMA lock must be held.
- */
-int scif_query_tcw(struct scif_endpt *ep, struct scif_rma_req *req)
-{
- struct list_head *item, *temp, *head = req->head;
- struct scif_window *window;
- u64 start_va_window, start_va_req = req->va_for_temp;
- u64 end_va_window, end_va_req = start_va_req + req->nr_bytes;
-
- if (!req->nr_bytes)
- return -EINVAL;
- /*
- * Avoid traversing the entire list to find out that there
- * is no entry that matches
- */
- if (!list_empty(head)) {
- window = list_last_entry(head, struct scif_window, list);
- end_va_window = window->va_for_temp +
- (window->nr_pages << PAGE_SHIFT);
- if (start_va_req > end_va_window)
- return -ENXIO;
- }
- list_for_each_safe(item, temp, head) {
- window = list_entry(item, struct scif_window, list);
- start_va_window = window->va_for_temp;
- end_va_window = window->va_for_temp +
- (window->nr_pages << PAGE_SHIFT);
- if (start_va_req < start_va_window &&
- end_va_req < start_va_window)
- break;
- if (start_va_req >= end_va_window)
- continue;
- if ((window->prot & req->prot) == req->prot) {
- if (start_va_req >= start_va_window &&
- end_va_req <= end_va_window) {
- *req->out_window = window;
- return 0;
- }
- /* expand window */
- if (start_va_req < start_va_window) {
- req->nr_bytes +=
- start_va_window - start_va_req;
- req->va_for_temp = start_va_window;
- }
- if (end_va_req >= end_va_window)
- req->nr_bytes += end_va_window - end_va_req;
- }
- /* Destroy the old window to create a new one */
- __scif_rma_destroy_tcw_helper(window);
- break;
- }
- return -ENXIO;
-}
-
-/*
- * scif_query_window:
- *
- * Query the registration list and check if a valid contiguous
- * range of windows exist.
- * RMA lock must be held.
- */
-int scif_query_window(struct scif_rma_req *req)
-{
- struct list_head *item;
- struct scif_window *window;
- s64 end_offset, offset = req->offset;
- u64 tmp_min, nr_bytes_left = req->nr_bytes;
-
- if (!req->nr_bytes)
- return -EINVAL;
-
- list_for_each(item, req->head) {
- window = list_entry(item, struct scif_window, list);
- end_offset = window->offset +
- (window->nr_pages << PAGE_SHIFT);
- if (offset < window->offset)
- /* Offset not found! */
- return -ENXIO;
- if (offset >= end_offset)
- continue;
- /* Check read/write protections. */
- if ((window->prot & req->prot) != req->prot)
- return -EPERM;
- if (nr_bytes_left == req->nr_bytes)
- /* Store the first window */
- *req->out_window = window;
- tmp_min = min((u64)end_offset - offset, nr_bytes_left);
- nr_bytes_left -= tmp_min;
- offset += tmp_min;
- /*
- * Range requested encompasses
- * multiple windows contiguously.
- */
- if (!nr_bytes_left) {
- /* Done for partial window */
- if (req->type == SCIF_WINDOW_PARTIAL ||
- req->type == SCIF_WINDOW_SINGLE)
- return 0;
- /* Extra logic for full windows */
- if (offset == end_offset)
- /* Spanning multiple whole windows */
- return 0;
- /* Not spanning multiple whole windows */
- return -ENXIO;
- }
- if (req->type == SCIF_WINDOW_SINGLE)
- break;
- }
- dev_err(scif_info.mdev.this_device,
- "%s %d ENXIO\n", __func__, __LINE__);
- return -ENXIO;
-}
-
-/*
- * scif_rma_list_unregister:
- *
- * Traverse the self registration list starting from window:
- * 1) Call scif_unregister_window(..)
- * RMA lock must be held.
- */
-int scif_rma_list_unregister(struct scif_window *window,
- s64 offset, int nr_pages)
-{
- struct scif_endpt *ep = (struct scif_endpt *)window->ep;
- struct list_head *head = &ep->rma_info.reg_list;
- s64 end_offset;
- int err = 0;
- int loop_nr_pages;
- struct scif_window *_window;
-
- list_for_each_entry_safe_from(window, _window, head, list) {
- end_offset = window->offset + (window->nr_pages << PAGE_SHIFT);
- loop_nr_pages = min((int)((end_offset - offset) >> PAGE_SHIFT),
- nr_pages);
- err = scif_unregister_window(window);
- if (err)
- return err;
- nr_pages -= loop_nr_pages;
- offset += (loop_nr_pages << PAGE_SHIFT);
- if (!nr_pages)
- break;
- }
- return 0;
-}
-
-/*
- * scif_unmap_all_window:
- *
- * Traverse all the windows in the self registration list and:
- * 1) Delete any DMA mappings created
- */
-void scif_unmap_all_windows(scif_epd_t epd)
-{
- struct list_head *item, *tmp;
- struct scif_window *window;
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- struct list_head *head = &ep->rma_info.reg_list;
-
- mutex_lock(&ep->rma_info.rma_lock);
- list_for_each_safe(item, tmp, head) {
- window = list_entry(item, struct scif_window, list);
- scif_unmap_window(ep->remote_dev, window);
- }
- mutex_unlock(&ep->rma_info.rma_lock);
-}
-
-/*
- * scif_unregister_all_window:
- *
- * Traverse all the windows in the self registration list and:
- * 1) Call scif_unregister_window(..)
- * RMA lock must be held.
- */
-int scif_unregister_all_windows(scif_epd_t epd)
-{
- struct list_head *item, *tmp;
- struct scif_window *window;
- struct scif_endpt *ep = (struct scif_endpt *)epd;
- struct list_head *head = &ep->rma_info.reg_list;
- int err = 0;
-
- mutex_lock(&ep->rma_info.rma_lock);
-retry:
- item = NULL;
- tmp = NULL;
- list_for_each_safe(item, tmp, head) {
- window = list_entry(item, struct scif_window, list);
- ep->rma_info.async_list_del = 0;
- err = scif_unregister_window(window);
- if (err)
- dev_err(scif_info.mdev.this_device,
- "%s %d err %d\n",
- __func__, __LINE__, err);
- /*
- * Need to restart list traversal if there has been
- * an asynchronous list entry deletion.
- */
- if (READ_ONCE(ep->rma_info.async_list_del))
- goto retry;
- }
- mutex_unlock(&ep->rma_info.rma_lock);
- if (!list_empty(&ep->rma_info.mmn_list)) {
- spin_lock(&scif_info.rmalock);
- list_add_tail(&ep->mmu_list, &scif_info.mmu_notif_cleanup);
- spin_unlock(&scif_info.rmalock);
- schedule_work(&scif_info.mmu_notif_work);
- }
- return err;
-}
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2015 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#ifndef SCIF_RMA_LIST_H
-#define SCIF_RMA_LIST_H
-
-/*
- * struct scif_rma_req - Self Registration list RMA Request query
- *
- * @out_window - Returns the window if found
- * @offset: Starting offset
- * @nr_bytes: number of bytes
- * @prot: protection requested i.e. read or write or both
- * @type: Specify single, partial or multiple windows
- * @head: Head of list on which to search
- * @va_for_temp: VA for searching temporary cached windows
- */
-struct scif_rma_req {
- struct scif_window **out_window;
- union {
- s64 offset;
- unsigned long va_for_temp;
- };
- size_t nr_bytes;
- int prot;
- enum scif_window_type type;
- struct list_head *head;
-};
-
-/* Insert */
-void scif_insert_window(struct scif_window *window, struct list_head *head);
-void scif_insert_tcw(struct scif_window *window,
- struct list_head *head);
-/* Query */
-int scif_query_window(struct scif_rma_req *request);
-int scif_query_tcw(struct scif_endpt *ep, struct scif_rma_req *request);
-/* Called from close to unregister all self windows */
-int scif_unregister_all_windows(scif_epd_t epd);
-void scif_unmap_all_windows(scif_epd_t epd);
-/* Traverse list and unregister */
-int scif_rma_list_unregister(struct scif_window *window, s64 offset,
- int nr_pages);
-#endif /* SCIF_RMA_LIST_H */
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Makefile - Intel MIC Linux driver.
-# Copyright(c) 2016, Intel Corporation.
-#
-obj-$(CONFIG_VOP) := vop.o
-
-vop-objs += vop_main.o
-vop-objs += vop_debugfs.o
-vop-objs += vop_vringh.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2016 Intel Corporation.
- *
- * Intel Virtio Over PCIe (VOP) driver.
- */
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-
-#include "vop_main.h"
-
-static int vop_dp_show(struct seq_file *s, void *pos)
-{
- struct mic_device_desc *d;
- struct mic_device_ctrl *dc;
- struct mic_vqconfig *vqconfig;
- __u32 *features;
- __u8 *config;
- struct vop_info *vi = s->private;
- struct vop_device *vpdev = vi->vpdev;
- struct mic_bootparam *bootparam = vpdev->hw_ops->get_dp(vpdev);
- int j, k;
-
- seq_printf(s, "Bootparam: magic 0x%x\n",
- bootparam->magic);
- seq_printf(s, "Bootparam: h2c_config_db %d\n",
- bootparam->h2c_config_db);
- seq_printf(s, "Bootparam: node_id %d\n",
- bootparam->node_id);
- seq_printf(s, "Bootparam: c2h_scif_db %d\n",
- bootparam->c2h_scif_db);
- seq_printf(s, "Bootparam: h2c_scif_db %d\n",
- bootparam->h2c_scif_db);
- seq_printf(s, "Bootparam: scif_host_dma_addr 0x%llx\n",
- bootparam->scif_host_dma_addr);
- seq_printf(s, "Bootparam: scif_card_dma_addr 0x%llx\n",
- bootparam->scif_card_dma_addr);
-
- for (j = sizeof(*bootparam);
- j < MIC_DP_SIZE; j += mic_total_desc_size(d)) {
- d = (void *)bootparam + j;
- dc = (void *)d + mic_aligned_desc_size(d);
-
- /* end of list */
- if (d->type == 0)
- break;
-
- if (d->type == -1)
- continue;
-
- seq_printf(s, "Type %d ", d->type);
- seq_printf(s, "Num VQ %d ", d->num_vq);
- seq_printf(s, "Feature Len %d\n", d->feature_len);
- seq_printf(s, "Config Len %d ", d->config_len);
- seq_printf(s, "Shutdown Status %d\n", d->status);
-
- for (k = 0; k < d->num_vq; k++) {
- vqconfig = mic_vq_config(d) + k;
- seq_printf(s, "vqconfig[%d]: ", k);
- seq_printf(s, "address 0x%llx ",
- vqconfig->address);
- seq_printf(s, "num %d ", vqconfig->num);
- seq_printf(s, "used address 0x%llx\n",
- vqconfig->used_address);
- }
-
- features = (__u32 *)mic_vq_features(d);
- seq_printf(s, "Features: Host 0x%x ", features[0]);
- seq_printf(s, "Guest 0x%x\n", features[1]);
-
- config = mic_vq_configspace(d);
- for (k = 0; k < d->config_len; k++)
- seq_printf(s, "config[%d]=%d\n", k, config[k]);
-
- seq_puts(s, "Device control:\n");
- seq_printf(s, "Config Change %d ", dc->config_change);
- seq_printf(s, "Vdev reset %d\n", dc->vdev_reset);
- seq_printf(s, "Guest Ack %d ", dc->guest_ack);
- seq_printf(s, "Host ack %d\n", dc->host_ack);
- seq_printf(s, "Used address updated %d ",
- dc->used_address_updated);
- seq_printf(s, "Vdev 0x%llx\n", dc->vdev);
- seq_printf(s, "c2h doorbell %d ", dc->c2h_vdev_db);
- seq_printf(s, "h2c doorbell %d\n", dc->h2c_vdev_db);
- }
- schedule_work(&vi->hotplug_work);
- return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(vop_dp);
-
-static int vop_vdev_info_show(struct seq_file *s, void *unused)
-{
- struct vop_info *vi = s->private;
- struct list_head *pos, *tmp;
- struct vop_vdev *vdev;
- int i, j;
-
- mutex_lock(&vi->vop_mutex);
- list_for_each_safe(pos, tmp, &vi->vdev_list) {
- vdev = list_entry(pos, struct vop_vdev, list);
- seq_printf(s, "VDEV type %d state %s in %ld out %ld in_dma %ld out_dma %ld\n",
- vdev->virtio_id,
- vop_vdevup(vdev) ? "UP" : "DOWN",
- vdev->in_bytes,
- vdev->out_bytes,
- vdev->in_bytes_dma,
- vdev->out_bytes_dma);
- for (i = 0; i < MIC_MAX_VRINGS; i++) {
- struct vring_desc *desc;
- struct vring_avail *avail;
- struct vring_used *used;
- struct vop_vringh *vvr = &vdev->vvr[i];
- struct vringh *vrh = &vvr->vrh;
- int num = vrh->vring.num;
-
- if (!num)
- continue;
- desc = vrh->vring.desc;
- seq_printf(s, "vring i %d avail_idx %d",
- i, vvr->vring.info->avail_idx & (num - 1));
- seq_printf(s, " vring i %d avail_idx %d\n",
- i, vvr->vring.info->avail_idx);
- seq_printf(s, "vrh i %d weak_barriers %d",
- i, vrh->weak_barriers);
- seq_printf(s, " last_avail_idx %d last_used_idx %d",
- vrh->last_avail_idx, vrh->last_used_idx);
- seq_printf(s, " completed %d\n", vrh->completed);
- for (j = 0; j < num; j++) {
- seq_printf(s, "desc[%d] addr 0x%llx len %d",
- j, desc->addr, desc->len);
- seq_printf(s, " flags 0x%x next %d\n",
- desc->flags, desc->next);
- desc++;
- }
- avail = vrh->vring.avail;
- seq_printf(s, "avail flags 0x%x idx %d\n",
- vringh16_to_cpu(vrh, avail->flags),
- vringh16_to_cpu(vrh,
- avail->idx) & (num - 1));
- seq_printf(s, "avail flags 0x%x idx %d\n",
- vringh16_to_cpu(vrh, avail->flags),
- vringh16_to_cpu(vrh, avail->idx));
- for (j = 0; j < num; j++)
- seq_printf(s, "avail ring[%d] %d\n",
- j, avail->ring[j]);
- used = vrh->vring.used;
- seq_printf(s, "used flags 0x%x idx %d\n",
- vringh16_to_cpu(vrh, used->flags),
- vringh16_to_cpu(vrh, used->idx) & (num - 1));
- seq_printf(s, "used flags 0x%x idx %d\n",
- vringh16_to_cpu(vrh, used->flags),
- vringh16_to_cpu(vrh, used->idx));
- for (j = 0; j < num; j++)
- seq_printf(s, "used ring[%d] id %d len %d\n",
- j, vringh32_to_cpu(vrh,
- used->ring[j].id),
- vringh32_to_cpu(vrh,
- used->ring[j].len));
- }
- }
- mutex_unlock(&vi->vop_mutex);
-
- return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(vop_vdev_info);
-
-void vop_init_debugfs(struct vop_info *vi)
-{
- char name[16];
-
- snprintf(name, sizeof(name), "%s%d", KBUILD_MODNAME, vi->vpdev->dnode);
- vi->dbg = debugfs_create_dir(name, NULL);
- debugfs_create_file("dp", 0444, vi->dbg, vi, &vop_dp_fops);
- debugfs_create_file("vdev_info", 0444, vi->dbg, vi, &vop_vdev_info_fops);
-}
-
-void vop_exit_debugfs(struct vop_info *vi)
-{
- debugfs_remove_recursive(vi->dbg);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2016 Intel Corporation.
- *
- * Adapted from:
- *
- * virtio for kvm on s390
- *
- * Copyright IBM Corp. 2008
- *
- * Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
- *
- * Intel Virtio Over PCIe (VOP) driver.
- */
-#include <linux/delay.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/dma-mapping.h>
-#include <linux/io-64-nonatomic-lo-hi.h>
-
-#include "vop_main.h"
-
-#define VOP_MAX_VRINGS 4
-
-/*
- * _vop_vdev - Allocated per virtio device instance injected by the peer.
- *
- * @vdev: Virtio device
- * @desc: Virtio device page descriptor
- * @dc: Virtio device control
- * @vpdev: VOP device which is the parent for this virtio device
- * @vr: Buffer for accessing the VRING
- * @used_virt: Virtual address of used ring
- * @used: DMA address of used ring
- * @used_size: Size of the used buffer
- * @reset_done: Track whether VOP reset is complete
- * @virtio_cookie: Cookie returned upon requesting a interrupt
- * @c2h_vdev_db: The doorbell used by the guest to interrupt the host
- * @h2c_vdev_db: The doorbell used by the host to interrupt the guest
- * @dnode: The destination node
- */
-struct _vop_vdev {
- struct virtio_device vdev;
- struct mic_device_desc __iomem *desc;
- struct mic_device_ctrl __iomem *dc;
- struct vop_device *vpdev;
- void __iomem *vr[VOP_MAX_VRINGS];
- void *used_virt[VOP_MAX_VRINGS];
- dma_addr_t used[VOP_MAX_VRINGS];
- int used_size[VOP_MAX_VRINGS];
- struct completion reset_done;
- struct mic_irq *virtio_cookie;
- int c2h_vdev_db;
- int h2c_vdev_db;
- int dnode;
-};
-
-#define to_vopvdev(vd) container_of(vd, struct _vop_vdev, vdev)
-
-#define _vop_aligned_desc_size(d) __mic_align(_vop_desc_size(d), 8)
-
-/* Helper API to obtain the parent of the virtio device */
-static inline struct device *_vop_dev(struct _vop_vdev *vdev)
-{
- return vdev->vdev.dev.parent;
-}
-
-static inline unsigned _vop_desc_size(struct mic_device_desc __iomem *desc)
-{
- return sizeof(*desc)
- + ioread8(&desc->num_vq) * sizeof(struct mic_vqconfig)
- + ioread8(&desc->feature_len) * 2
- + ioread8(&desc->config_len);
-}
-
-static inline struct mic_vqconfig __iomem *
-_vop_vq_config(struct mic_device_desc __iomem *desc)
-{
- return (struct mic_vqconfig __iomem *)(desc + 1);
-}
-
-static inline u8 __iomem *
-_vop_vq_features(struct mic_device_desc __iomem *desc)
-{
- return (u8 __iomem *)(_vop_vq_config(desc) + ioread8(&desc->num_vq));
-}
-
-static inline u8 __iomem *
-_vop_vq_configspace(struct mic_device_desc __iomem *desc)
-{
- return _vop_vq_features(desc) + ioread8(&desc->feature_len) * 2;
-}
-
-static inline unsigned
-_vop_total_desc_size(struct mic_device_desc __iomem *desc)
-{
- return _vop_aligned_desc_size(desc) + sizeof(struct mic_device_ctrl);
-}
-
-/* This gets the device's feature bits. */
-static u64 vop_get_features(struct virtio_device *vdev)
-{
- unsigned int i, bits;
- u64 features = 0;
- struct mic_device_desc __iomem *desc = to_vopvdev(vdev)->desc;
- u8 __iomem *in_features = _vop_vq_features(desc);
- int feature_len = ioread8(&desc->feature_len);
-
- bits = min_t(unsigned, feature_len, sizeof(vdev->features)) * 8;
- for (i = 0; i < bits; i++)
- if (ioread8(&in_features[i / 8]) & (BIT(i % 8)))
- features |= BIT_ULL(i);
-
- return features;
-}
-
-static void vop_transport_features(struct virtio_device *vdev)
-{
- /*
- * Packed ring isn't enabled on virtio_vop for now,
- * because virtio_vop uses vring_new_virtqueue() which
- * creates virtio rings on preallocated memory.
- */
- __virtio_clear_bit(vdev, VIRTIO_F_RING_PACKED);
- __virtio_set_bit(vdev, VIRTIO_F_ACCESS_PLATFORM);
-}
-
-static int vop_finalize_features(struct virtio_device *vdev)
-{
- unsigned int i, bits;
- struct mic_device_desc __iomem *desc = to_vopvdev(vdev)->desc;
- u8 feature_len = ioread8(&desc->feature_len);
- /* Second half of bitmap is features we accept. */
- u8 __iomem *out_features =
- _vop_vq_features(desc) + feature_len;
-
- /* Give virtio_ring a chance to accept features. */
- vring_transport_features(vdev);
-
- /* Give virtio_vop a chance to accept features. */
- vop_transport_features(vdev);
-
- memset_io(out_features, 0, feature_len);
- bits = min_t(unsigned, feature_len,
- sizeof(vdev->features)) * 8;
- for (i = 0; i < bits; i++) {
- if (__virtio_test_bit(vdev, i))
- iowrite8(ioread8(&out_features[i / 8]) | (1 << (i % 8)),
- &out_features[i / 8]);
- }
- return 0;
-}
-
-/*
- * Reading and writing elements in config space
- */
-static void vop_get(struct virtio_device *vdev, unsigned int offset,
- void *buf, unsigned len)
-{
- struct mic_device_desc __iomem *desc = to_vopvdev(vdev)->desc;
-
- if (offset + len > ioread8(&desc->config_len))
- return;
- memcpy_fromio(buf, _vop_vq_configspace(desc) + offset, len);
-}
-
-static void vop_set(struct virtio_device *vdev, unsigned int offset,
- const void *buf, unsigned len)
-{
- struct mic_device_desc __iomem *desc = to_vopvdev(vdev)->desc;
-
- if (offset + len > ioread8(&desc->config_len))
- return;
- memcpy_toio(_vop_vq_configspace(desc) + offset, buf, len);
-}
-
-/*
- * The operations to get and set the status word just access the status
- * field of the device descriptor. set_status also interrupts the host
- * to tell about status changes.
- */
-static u8 vop_get_status(struct virtio_device *vdev)
-{
- return ioread8(&to_vopvdev(vdev)->desc->status);
-}
-
-static void vop_set_status(struct virtio_device *dev, u8 status)
-{
- struct _vop_vdev *vdev = to_vopvdev(dev);
- struct vop_device *vpdev = vdev->vpdev;
-
- if (!status)
- return;
- iowrite8(status, &vdev->desc->status);
- vpdev->hw_ops->send_intr(vpdev, vdev->c2h_vdev_db);
-}
-
-/* Inform host on a virtio device reset and wait for ack from host */
-static void vop_reset_inform_host(struct virtio_device *dev)
-{
- struct _vop_vdev *vdev = to_vopvdev(dev);
- struct mic_device_ctrl __iomem *dc = vdev->dc;
- struct vop_device *vpdev = vdev->vpdev;
- int retry;
-
- iowrite8(0, &dc->host_ack);
- iowrite8(1, &dc->vdev_reset);
- vpdev->hw_ops->send_intr(vpdev, vdev->c2h_vdev_db);
-
- /* Wait till host completes all card accesses and acks the reset */
- for (retry = 100; retry--;) {
- if (ioread8(&dc->host_ack))
- break;
- msleep(100);
- }
-
- dev_dbg(_vop_dev(vdev), "%s: retry: %d\n", __func__, retry);
-
- /* Reset status to 0 in case we timed out */
- iowrite8(0, &vdev->desc->status);
-}
-
-static void vop_reset(struct virtio_device *dev)
-{
- struct _vop_vdev *vdev = to_vopvdev(dev);
-
- dev_dbg(_vop_dev(vdev), "%s: virtio id %d\n",
- __func__, dev->id.device);
-
- vop_reset_inform_host(dev);
- complete_all(&vdev->reset_done);
-}
-
-/*
- * The virtio_ring code calls this API when it wants to notify the Host.
- */
-static bool vop_notify(struct virtqueue *vq)
-{
- struct _vop_vdev *vdev = vq->priv;
- struct vop_device *vpdev = vdev->vpdev;
-
- vpdev->hw_ops->send_intr(vpdev, vdev->c2h_vdev_db);
- return true;
-}
-
-static void vop_del_vq(struct virtqueue *vq, int n)
-{
- struct _vop_vdev *vdev = to_vopvdev(vq->vdev);
- struct vop_device *vpdev = vdev->vpdev;
-
- dma_unmap_single(&vpdev->dev, vdev->used[n],
- vdev->used_size[n], DMA_BIDIRECTIONAL);
- free_pages((unsigned long)vdev->used_virt[n],
- get_order(vdev->used_size[n]));
- vring_del_virtqueue(vq);
- vpdev->hw_ops->unmap(vpdev, vdev->vr[n]);
- vdev->vr[n] = NULL;
-}
-
-static void vop_del_vqs(struct virtio_device *dev)
-{
- struct _vop_vdev *vdev = to_vopvdev(dev);
- struct virtqueue *vq, *n;
- int idx = 0;
-
- dev_dbg(_vop_dev(vdev), "%s\n", __func__);
-
- list_for_each_entry_safe(vq, n, &dev->vqs, list)
- vop_del_vq(vq, idx++);
-}
-
-static struct virtqueue *vop_new_virtqueue(unsigned int index,
- unsigned int num,
- struct virtio_device *vdev,
- bool context,
- void *pages,
- bool (*notify)(struct virtqueue *vq),
- void (*callback)(struct virtqueue *vq),
- const char *name,
- void *used)
-{
- bool weak_barriers = false;
- struct vring vring;
-
- vring_init(&vring, num, pages, MIC_VIRTIO_RING_ALIGN);
- vring.used = used;
-
- return __vring_new_virtqueue(index, vring, vdev, weak_barriers, context,
- notify, callback, name);
-}
-
-/*
- * This routine will assign vring's allocated in host/io memory. Code in
- * virtio_ring.c however continues to access this io memory as if it were local
- * memory without io accessors.
- */
-static struct virtqueue *vop_find_vq(struct virtio_device *dev,
- unsigned index,
- void (*callback)(struct virtqueue *vq),
- const char *name, bool ctx)
-{
- struct _vop_vdev *vdev = to_vopvdev(dev);
- struct vop_device *vpdev = vdev->vpdev;
- struct mic_vqconfig __iomem *vqconfig;
- struct mic_vqconfig config;
- struct virtqueue *vq;
- void __iomem *va;
- struct _mic_vring_info __iomem *info;
- void *used;
- int vr_size, _vr_size, err, magic;
- u8 type = ioread8(&vdev->desc->type);
-
- if (index >= ioread8(&vdev->desc->num_vq))
- return ERR_PTR(-ENOENT);
-
- if (!name)
- return ERR_PTR(-ENOENT);
-
- /* First assign the vring's allocated in host memory */
- vqconfig = _vop_vq_config(vdev->desc) + index;
- memcpy_fromio(&config, vqconfig, sizeof(config));
- _vr_size = round_up(vring_size(le16_to_cpu(config.num), MIC_VIRTIO_RING_ALIGN), 4);
- vr_size = PAGE_ALIGN(_vr_size + sizeof(struct _mic_vring_info));
- va = vpdev->hw_ops->remap(vpdev, le64_to_cpu(config.address), vr_size);
- if (!va)
- return ERR_PTR(-ENOMEM);
- vdev->vr[index] = va;
- memset_io(va, 0x0, _vr_size);
-
- info = va + _vr_size;
- magic = ioread32(&info->magic);
-
- if (WARN(magic != MIC_MAGIC + type + index, "magic mismatch")) {
- err = -EIO;
- goto unmap;
- }
-
- vdev->used_size[index] = PAGE_ALIGN(sizeof(__u16) * 3 +
- sizeof(struct vring_used_elem) *
- le16_to_cpu(config.num));
- used = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
- get_order(vdev->used_size[index]));
- vdev->used_virt[index] = used;
- if (!used) {
- err = -ENOMEM;
- dev_err(_vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, err);
- goto unmap;
- }
-
- vq = vop_new_virtqueue(index, le16_to_cpu(config.num), dev, ctx,
- (void __force *)va, vop_notify, callback,
- name, used);
- if (!vq) {
- err = -ENOMEM;
- goto free_used;
- }
-
- vdev->used[index] = dma_map_single(&vpdev->dev, used,
- vdev->used_size[index],
- DMA_BIDIRECTIONAL);
- if (dma_mapping_error(&vpdev->dev, vdev->used[index])) {
- err = -ENOMEM;
- dev_err(_vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, err);
- goto del_vq;
- }
- writeq(vdev->used[index], &vqconfig->used_address);
-
- vq->priv = vdev;
- return vq;
-del_vq:
- vring_del_virtqueue(vq);
-free_used:
- free_pages((unsigned long)used,
- get_order(vdev->used_size[index]));
-unmap:
- vpdev->hw_ops->unmap(vpdev, vdev->vr[index]);
- return ERR_PTR(err);
-}
-
-static int vop_find_vqs(struct virtio_device *dev, unsigned nvqs,
- struct virtqueue *vqs[],
- vq_callback_t *callbacks[],
- const char * const names[], const bool *ctx,
- struct irq_affinity *desc)
-{
- struct _vop_vdev *vdev = to_vopvdev(dev);
- struct vop_device *vpdev = vdev->vpdev;
- struct mic_device_ctrl __iomem *dc = vdev->dc;
- int i, err, retry, queue_idx = 0;
-
- /* We must have this many virtqueues. */
- if (nvqs > ioread8(&vdev->desc->num_vq))
- return -ENOENT;
-
- for (i = 0; i < nvqs; ++i) {
- if (!names[i]) {
- vqs[i] = NULL;
- continue;
- }
-
- dev_dbg(_vop_dev(vdev), "%s: %d: %s\n",
- __func__, i, names[i]);
- vqs[i] = vop_find_vq(dev, queue_idx++, callbacks[i], names[i],
- ctx ? ctx[i] : false);
- if (IS_ERR(vqs[i])) {
- err = PTR_ERR(vqs[i]);
- goto error;
- }
- }
-
- iowrite8(1, &dc->used_address_updated);
- /*
- * Send an interrupt to the host to inform it that used
- * rings have been re-assigned.
- */
- vpdev->hw_ops->send_intr(vpdev, vdev->c2h_vdev_db);
- for (retry = 100; --retry;) {
- if (!ioread8(&dc->used_address_updated))
- break;
- msleep(100);
- }
-
- dev_dbg(_vop_dev(vdev), "%s: retry: %d\n", __func__, retry);
- if (!retry) {
- err = -ENODEV;
- goto error;
- }
-
- return 0;
-error:
- vop_del_vqs(dev);
- return err;
-}
-
-/*
- * The config ops structure as defined by virtio config
- */
-static const struct virtio_config_ops vop_vq_config_ops = {
- .get_features = vop_get_features,
- .finalize_features = vop_finalize_features,
- .get = vop_get,
- .set = vop_set,
- .get_status = vop_get_status,
- .set_status = vop_set_status,
- .reset = vop_reset,
- .find_vqs = vop_find_vqs,
- .del_vqs = vop_del_vqs,
-};
-
-static irqreturn_t vop_virtio_intr_handler(int irq, void *data)
-{
- struct _vop_vdev *vdev = data;
- struct vop_device *vpdev = vdev->vpdev;
- struct virtqueue *vq;
-
- vpdev->hw_ops->ack_interrupt(vpdev, vdev->h2c_vdev_db);
- list_for_each_entry(vq, &vdev->vdev.vqs, list)
- vring_interrupt(0, vq);
-
- return IRQ_HANDLED;
-}
-
-static void vop_virtio_release_dev(struct device *_d)
-{
- struct virtio_device *vdev =
- container_of(_d, struct virtio_device, dev);
- struct _vop_vdev *vop_vdev =
- container_of(vdev, struct _vop_vdev, vdev);
-
- kfree(vop_vdev);
-}
-
-/*
- * adds a new device and register it with virtio
- * appropriate drivers are loaded by the device model
- */
-static int _vop_add_device(struct mic_device_desc __iomem *d,
- unsigned int offset, struct vop_device *vpdev,
- int dnode)
-{
- struct _vop_vdev *vdev, *reg_dev = NULL;
- int ret;
- u8 type = ioread8(&d->type);
-
- vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
- if (!vdev)
- return -ENOMEM;
-
- vdev->vpdev = vpdev;
- vdev->vdev.dev.parent = &vpdev->dev;
- vdev->vdev.dev.release = vop_virtio_release_dev;
- vdev->vdev.id.device = type;
- vdev->vdev.config = &vop_vq_config_ops;
- vdev->desc = d;
- vdev->dc = (void __iomem *)d + _vop_aligned_desc_size(d);
- vdev->dnode = dnode;
- vdev->vdev.priv = (void *)(unsigned long)dnode;
- init_completion(&vdev->reset_done);
-
- vdev->h2c_vdev_db = vpdev->hw_ops->next_db(vpdev);
- vdev->virtio_cookie = vpdev->hw_ops->request_irq(vpdev,
- vop_virtio_intr_handler, "virtio intr",
- vdev, vdev->h2c_vdev_db);
- if (IS_ERR(vdev->virtio_cookie)) {
- ret = PTR_ERR(vdev->virtio_cookie);
- goto kfree;
- }
- iowrite8((u8)vdev->h2c_vdev_db, &vdev->dc->h2c_vdev_db);
- vdev->c2h_vdev_db = ioread8(&vdev->dc->c2h_vdev_db);
-
- ret = register_virtio_device(&vdev->vdev);
- reg_dev = vdev;
- if (ret) {
- dev_err(_vop_dev(vdev),
- "Failed to register vop device %u type %u\n",
- offset, type);
- goto free_irq;
- }
- writeq((unsigned long)vdev, &vdev->dc->vdev);
- dev_dbg(_vop_dev(vdev), "%s: registered vop device %u type %u vdev %p\n",
- __func__, offset, type, vdev);
-
- return 0;
-
-free_irq:
- vpdev->hw_ops->free_irq(vpdev, vdev->virtio_cookie, vdev);
-kfree:
- if (reg_dev)
- put_device(&vdev->vdev.dev);
- else
- kfree(vdev);
- return ret;
-}
-
-/*
- * match for a vop device with a specific desc pointer
- */
-static int vop_match_desc(struct device *dev, void *data)
-{
- struct virtio_device *_dev = dev_to_virtio(dev);
- struct _vop_vdev *vdev = to_vopvdev(_dev);
-
- return vdev->desc == (void __iomem *)data;
-}
-
-static struct _vop_vdev *vop_dc_to_vdev(struct mic_device_ctrl __iomem *dc)
-{
- return (struct _vop_vdev *)(unsigned long)readq(&dc->vdev);
-}
-
-static void _vop_handle_config_change(struct mic_device_desc __iomem *d,
- unsigned int offset,
- struct vop_device *vpdev)
-{
- struct mic_device_ctrl __iomem *dc
- = (void __iomem *)d + _vop_aligned_desc_size(d);
- struct _vop_vdev *vdev = vop_dc_to_vdev(dc);
-
- if (ioread8(&dc->config_change) != MIC_VIRTIO_PARAM_CONFIG_CHANGED)
- return;
-
- dev_dbg(&vpdev->dev, "%s %d\n", __func__, __LINE__);
- virtio_config_changed(&vdev->vdev);
- iowrite8(1, &dc->guest_ack);
-}
-
-/*
- * removes a virtio device if a hot remove event has been
- * requested by the host.
- */
-static int _vop_remove_device(struct mic_device_desc __iomem *d,
- unsigned int offset, struct vop_device *vpdev)
-{
- struct mic_device_ctrl __iomem *dc
- = (void __iomem *)d + _vop_aligned_desc_size(d);
- struct _vop_vdev *vdev = vop_dc_to_vdev(dc);
- u8 status;
- int ret = -1;
-
- if (ioread8(&dc->config_change) == MIC_VIRTIO_PARAM_DEV_REMOVE) {
- struct device *dev = get_device(&vdev->vdev.dev);
-
- dev_dbg(&vpdev->dev,
- "%s %d config_change %d type %d vdev %p\n",
- __func__, __LINE__,
- ioread8(&dc->config_change), ioread8(&d->type), vdev);
- status = ioread8(&d->status);
- reinit_completion(&vdev->reset_done);
- unregister_virtio_device(&vdev->vdev);
- vpdev->hw_ops->free_irq(vpdev, vdev->virtio_cookie, vdev);
- iowrite8(-1, &dc->h2c_vdev_db);
- if (status & VIRTIO_CONFIG_S_DRIVER_OK)
- wait_for_completion(&vdev->reset_done);
- put_device(dev);
- iowrite8(1, &dc->guest_ack);
- dev_dbg(&vpdev->dev, "%s %d guest_ack %d\n",
- __func__, __LINE__, ioread8(&dc->guest_ack));
- iowrite8(-1, &d->type);
- ret = 0;
- }
- return ret;
-}
-
-#define REMOVE_DEVICES true
-
-static void _vop_scan_devices(void __iomem *dp, struct vop_device *vpdev,
- bool remove, int dnode)
-{
- s8 type;
- unsigned int i;
- struct mic_device_desc __iomem *d;
- struct mic_device_ctrl __iomem *dc;
- struct device *dev;
-
- for (i = sizeof(struct mic_bootparam);
- i < MIC_DP_SIZE; i += _vop_total_desc_size(d)) {
- d = dp + i;
- dc = (void __iomem *)d + _vop_aligned_desc_size(d);
- /*
- * This read barrier is paired with the corresponding write
- * barrier on the host which is inserted before adding or
- * removing a virtio device descriptor, by updating the type.
- */
- rmb();
- type = ioread8(&d->type);
-
- /* end of list */
- if (type == 0)
- break;
-
- if (type == -1)
- continue;
-
- /* device already exists */
- dev = device_find_child(&vpdev->dev, (void __force *)d,
- vop_match_desc);
- if (dev) {
- if (remove)
- iowrite8(MIC_VIRTIO_PARAM_DEV_REMOVE,
- &dc->config_change);
- put_device(dev);
- _vop_handle_config_change(d, i, vpdev);
- _vop_remove_device(d, i, vpdev);
- if (remove) {
- iowrite8(0, &dc->config_change);
- iowrite8(0, &dc->guest_ack);
- }
- continue;
- }
-
- /* new device */
- dev_dbg(&vpdev->dev, "%s %d Adding new virtio device %p\n",
- __func__, __LINE__, d);
- if (!remove)
- _vop_add_device(d, i, vpdev, dnode);
- }
-}
-
-static void vop_scan_devices(struct vop_info *vi,
- struct vop_device *vpdev, bool remove)
-{
- void __iomem *dp = vpdev->hw_ops->get_remote_dp(vpdev);
-
- if (!dp)
- return;
- mutex_lock(&vi->vop_mutex);
- _vop_scan_devices(dp, vpdev, remove, vpdev->dnode);
- mutex_unlock(&vi->vop_mutex);
-}
-
-/*
- * vop_hotplug_device tries to find changes in the device page.
- */
-static void vop_hotplug_devices(struct work_struct *work)
-{
- struct vop_info *vi = container_of(work, struct vop_info,
- hotplug_work);
-
- vop_scan_devices(vi, vi->vpdev, !REMOVE_DEVICES);
-}
-
-/*
- * Interrupt handler for hot plug/config changes etc.
- */
-static irqreturn_t vop_extint_handler(int irq, void *data)
-{
- struct vop_info *vi = data;
- struct mic_bootparam __iomem *bp;
- struct vop_device *vpdev = vi->vpdev;
-
- bp = vpdev->hw_ops->get_remote_dp(vpdev);
- dev_dbg(&vpdev->dev, "%s %d hotplug work\n",
- __func__, __LINE__);
- vpdev->hw_ops->ack_interrupt(vpdev, ioread8(&bp->h2c_config_db));
- schedule_work(&vi->hotplug_work);
- return IRQ_HANDLED;
-}
-
-static int vop_driver_probe(struct vop_device *vpdev)
-{
- struct vop_info *vi;
- int rc;
-
- vi = kzalloc(sizeof(*vi), GFP_KERNEL);
- if (!vi) {
- rc = -ENOMEM;
- goto exit;
- }
- dev_set_drvdata(&vpdev->dev, vi);
- vi->vpdev = vpdev;
-
- mutex_init(&vi->vop_mutex);
- INIT_WORK(&vi->hotplug_work, vop_hotplug_devices);
- if (vpdev->dnode) {
- rc = vop_host_init(vi);
- if (rc < 0)
- goto free;
- } else {
- struct mic_bootparam __iomem *bootparam;
-
- vop_scan_devices(vi, vpdev, !REMOVE_DEVICES);
-
- vi->h2c_config_db = vpdev->hw_ops->next_db(vpdev);
- vi->cookie = vpdev->hw_ops->request_irq(vpdev,
- vop_extint_handler,
- "virtio_config_intr",
- vi, vi->h2c_config_db);
- if (IS_ERR(vi->cookie)) {
- rc = PTR_ERR(vi->cookie);
- goto free;
- }
- bootparam = vpdev->hw_ops->get_remote_dp(vpdev);
- iowrite8(vi->h2c_config_db, &bootparam->h2c_config_db);
- }
- vop_init_debugfs(vi);
- return 0;
-free:
- kfree(vi);
-exit:
- return rc;
-}
-
-static void vop_driver_remove(struct vop_device *vpdev)
-{
- struct vop_info *vi = dev_get_drvdata(&vpdev->dev);
-
- if (vpdev->dnode) {
- vop_host_uninit(vi);
- } else {
- struct mic_bootparam __iomem *bootparam =
- vpdev->hw_ops->get_remote_dp(vpdev);
- if (bootparam)
- iowrite8(-1, &bootparam->h2c_config_db);
- vpdev->hw_ops->free_irq(vpdev, vi->cookie, vi);
- flush_work(&vi->hotplug_work);
- vop_scan_devices(vi, vpdev, REMOVE_DEVICES);
- }
- vop_exit_debugfs(vi);
- kfree(vi);
-}
-
-static const struct vop_device_id id_table[] = {
- { VOP_DEV_TRNSP, VOP_DEV_ANY_ID },
- { 0 },
-};
-
-static struct vop_driver vop_driver = {
- .driver.name = KBUILD_MODNAME,
- .driver.owner = THIS_MODULE,
- .id_table = id_table,
- .probe = vop_driver_probe,
- .remove = vop_driver_remove,
-};
-
-module_vop_driver(vop_driver);
-
-MODULE_DEVICE_TABLE(mbus, id_table);
-MODULE_AUTHOR("Intel Corporation");
-MODULE_DESCRIPTION("Intel(R) Virtio Over PCIe (VOP) driver");
-MODULE_LICENSE("GPL v2");
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2016 Intel Corporation.
- *
- * Intel Virtio Over PCIe (VOP) driver.
- */
-#ifndef _VOP_MAIN_H_
-#define _VOP_MAIN_H_
-
-#include <linux/vringh.h>
-#include <linux/virtio_config.h>
-#include <linux/virtio.h>
-#include <linux/miscdevice.h>
-
-#include <linux/mic_common.h>
-#include "../common/mic_dev.h"
-
-#include "../bus/vop_bus.h"
-
-/*
- * Note on endianness.
- * 1. Host can be both BE or LE
- * 2. Guest/card is LE. Host uses le_to_cpu to access desc/avail
- * rings and ioreadXX/iowriteXX to access used ring.
- * 3. Device page exposed by host to guest contains LE values. Guest
- * accesses these using ioreadXX/iowriteXX etc. This way in general we
- * obey the virtio spec according to which guest works with native
- * endianness and host is aware of guest endianness and does all
- * required endianness conversion.
- * 4. Data provided from user space to guest (in ADD_DEVICE and
- * CONFIG_CHANGE ioctl's) is not interpreted by the driver and should be
- * in guest endianness.
- */
-
-/*
- * vop_info - Allocated per invocation of VOP probe
- *
- * @vpdev: VOP device
- * @hotplug_work: Handle virtio device creation, deletion and configuration
- * @cookie: Cookie received upon requesting a virtio configuration interrupt
- * @h2c_config_db: The doorbell used by the peer to indicate a config change
- * @vdev_list: List of "active" virtio devices injected in the peer node
- * @vop_mutex: Synchronize access to the device page as well as serialize
- * creation/deletion of virtio devices on the peer node
- * @dp: Peer device page information
- * @dbg: Debugfs entry
- * @dma_ch: The DMA channel used by this transport for data transfers.
- * @name: Name for this transport used in misc device creation.
- * @miscdev: The misc device registered.
- */
-struct vop_info {
- struct vop_device *vpdev;
- struct work_struct hotplug_work;
- struct mic_irq *cookie;
- int h2c_config_db;
- struct list_head vdev_list;
- struct mutex vop_mutex;
- void __iomem *dp;
- struct dentry *dbg;
- struct dma_chan *dma_ch;
- char name[16];
- struct miscdevice miscdev;
-};
-
-/**
- * struct vop_vringh - Virtio ring host information.
- *
- * @vring: The VOP vring used for setting up user space mappings.
- * @vrh: The host VRINGH used for accessing the card vrings.
- * @riov: The VRINGH read kernel IOV.
- * @wiov: The VRINGH write kernel IOV.
- * @head: The VRINGH head index address passed to vringh_getdesc_kern(..).
- * @vr_mutex: Mutex for synchronizing access to the VRING.
- * @buf: Temporary kernel buffer used to copy in/out data
- * from/to the card via DMA.
- * @buf_da: dma address of buf.
- * @vdev: Back pointer to VOP virtio device for vringh_notify(..).
- */
-struct vop_vringh {
- struct mic_vring vring;
- struct vringh vrh;
- struct vringh_kiov riov;
- struct vringh_kiov wiov;
- u16 head;
- struct mutex vr_mutex;
- void *buf;
- dma_addr_t buf_da;
- struct vop_vdev *vdev;
-};
-
-/**
- * struct vop_vdev - Host information for a card Virtio device.
- *
- * @virtio_id - Virtio device id.
- * @waitq - Waitqueue to allow ring3 apps to poll.
- * @vpdev - pointer to VOP bus device.
- * @poll_wake - Used for waking up threads blocked in poll.
- * @out_bytes - Debug stats for number of bytes copied from host to card.
- * @in_bytes - Debug stats for number of bytes copied from card to host.
- * @out_bytes_dma - Debug stats for number of bytes copied from host to card
- * using DMA.
- * @in_bytes_dma - Debug stats for number of bytes copied from card to host
- * using DMA.
- * @tx_len_unaligned - Debug stats for number of bytes copied to the card where
- * the transfer length did not have the required DMA alignment.
- * @tx_dst_unaligned - Debug stats for number of bytes copied where the
- * destination address on the card did not have the required DMA alignment.
- * @vvr - Store per VRING data structures.
- * @virtio_bh_work - Work struct used to schedule virtio bottom half handling.
- * @dd - Virtio device descriptor.
- * @dc - Virtio device control fields.
- * @list - List of Virtio devices.
- * @virtio_db - The doorbell used by the card to interrupt the host.
- * @virtio_cookie - The cookie returned while requesting interrupts.
- * @vi: Transport information.
- * @vdev_mutex: Mutex synchronizing virtio device injection,
- * removal and data transfers.
- * @destroy: Track if a virtio device is being destroyed.
- * @deleted: The virtio device has been deleted.
- */
-struct vop_vdev {
- int virtio_id;
- wait_queue_head_t waitq;
- struct vop_device *vpdev;
- int poll_wake;
- unsigned long out_bytes;
- unsigned long in_bytes;
- unsigned long out_bytes_dma;
- unsigned long in_bytes_dma;
- unsigned long tx_len_unaligned;
- unsigned long tx_dst_unaligned;
- unsigned long rx_dst_unaligned;
- struct vop_vringh vvr[MIC_MAX_VRINGS];
- struct work_struct virtio_bh_work;
- struct mic_device_desc *dd;
- struct mic_device_ctrl *dc;
- struct list_head list;
- int virtio_db;
- struct mic_irq *virtio_cookie;
- struct vop_info *vi;
- struct mutex vdev_mutex;
- struct completion destroy;
- bool deleted;
-};
-
-/* Helper API to check if a virtio device is running */
-static inline bool vop_vdevup(struct vop_vdev *vdev)
-{
- return !!vdev->dd->status;
-}
-
-void vop_init_debugfs(struct vop_info *vi);
-void vop_exit_debugfs(struct vop_info *vi);
-int vop_host_init(struct vop_info *vi);
-void vop_host_uninit(struct vop_info *vi);
-#endif
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2016 Intel Corporation.
- *
- * Intel Virtio Over PCIe (VOP) driver.
- */
-#include <linux/sched.h>
-#include <linux/poll.h>
-#include <linux/dma-mapping.h>
-
-#include <linux/mic_common.h>
-#include "../common/mic_dev.h"
-
-#include <linux/mic_ioctl.h>
-#include "vop_main.h"
-
-/* Helper API to obtain the VOP PCIe device */
-static inline struct device *vop_dev(struct vop_vdev *vdev)
-{
- return vdev->vpdev->dev.parent;
-}
-
-/* Helper API to check if a virtio device is initialized */
-static inline int vop_vdev_inited(struct vop_vdev *vdev)
-{
- if (!vdev)
- return -EINVAL;
- /* Device has not been created yet */
- if (!vdev->dd || !vdev->dd->type) {
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, -EINVAL);
- return -EINVAL;
- }
- /* Device has been removed/deleted */
- if (vdev->dd->type == -1) {
- dev_dbg(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, -ENODEV);
- return -ENODEV;
- }
- return 0;
-}
-
-static void _vop_notify(struct vringh *vrh)
-{
- struct vop_vringh *vvrh = container_of(vrh, struct vop_vringh, vrh);
- struct vop_vdev *vdev = vvrh->vdev;
- struct vop_device *vpdev = vdev->vpdev;
- s8 db = vdev->dc->h2c_vdev_db;
-
- if (db != -1)
- vpdev->hw_ops->send_intr(vpdev, db);
-}
-
-static void vop_virtio_init_post(struct vop_vdev *vdev)
-{
- struct mic_vqconfig *vqconfig = mic_vq_config(vdev->dd);
- struct vop_device *vpdev = vdev->vpdev;
- int i, used_size;
-
- for (i = 0; i < vdev->dd->num_vq; i++) {
- used_size = PAGE_ALIGN(sizeof(u16) * 3 +
- sizeof(struct vring_used_elem) *
- le16_to_cpu(vqconfig->num));
- if (!le64_to_cpu(vqconfig[i].used_address)) {
- dev_warn(vop_dev(vdev), "used_address zero??\n");
- continue;
- }
- vdev->vvr[i].vrh.vring.used =
- (void __force *)vpdev->hw_ops->remap(
- vpdev,
- le64_to_cpu(vqconfig[i].used_address),
- used_size);
- }
-
- vdev->dc->used_address_updated = 0;
-
- dev_info(vop_dev(vdev), "%s: device type %d LINKUP\n",
- __func__, vdev->virtio_id);
-}
-
-static inline void vop_virtio_device_reset(struct vop_vdev *vdev)
-{
- int i;
-
- dev_dbg(vop_dev(vdev), "%s: status %d device type %d RESET\n",
- __func__, vdev->dd->status, vdev->virtio_id);
-
- for (i = 0; i < vdev->dd->num_vq; i++)
- /*
- * Avoid lockdep false positive. The + 1 is for the vop
- * mutex which is held in the reset devices code path.
- */
- mutex_lock_nested(&vdev->vvr[i].vr_mutex, i + 1);
-
- /* 0 status means "reset" */
- vdev->dd->status = 0;
- vdev->dc->vdev_reset = 0;
- vdev->dc->host_ack = 1;
-
- for (i = 0; i < vdev->dd->num_vq; i++) {
- struct vringh *vrh = &vdev->vvr[i].vrh;
-
- vdev->vvr[i].vring.info->avail_idx = 0;
- vrh->completed = 0;
- vrh->last_avail_idx = 0;
- vrh->last_used_idx = 0;
- }
-
- for (i = 0; i < vdev->dd->num_vq; i++)
- mutex_unlock(&vdev->vvr[i].vr_mutex);
-}
-
-static void vop_virtio_reset_devices(struct vop_info *vi)
-{
- struct list_head *pos, *tmp;
- struct vop_vdev *vdev;
-
- list_for_each_safe(pos, tmp, &vi->vdev_list) {
- vdev = list_entry(pos, struct vop_vdev, list);
- vop_virtio_device_reset(vdev);
- vdev->poll_wake = 1;
- wake_up(&vdev->waitq);
- }
-}
-
-static void vop_bh_handler(struct work_struct *work)
-{
- struct vop_vdev *vdev = container_of(work, struct vop_vdev,
- virtio_bh_work);
-
- if (vdev->dc->used_address_updated)
- vop_virtio_init_post(vdev);
-
- if (vdev->dc->vdev_reset)
- vop_virtio_device_reset(vdev);
-
- vdev->poll_wake = 1;
- wake_up(&vdev->waitq);
-}
-
-static irqreturn_t _vop_virtio_intr_handler(int irq, void *data)
-{
- struct vop_vdev *vdev = data;
- struct vop_device *vpdev = vdev->vpdev;
-
- vpdev->hw_ops->ack_interrupt(vpdev, vdev->virtio_db);
- schedule_work(&vdev->virtio_bh_work);
- return IRQ_HANDLED;
-}
-
-static int vop_virtio_config_change(struct vop_vdev *vdev, void *argp)
-{
- DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wake);
- int ret = 0, retry, i;
- struct vop_device *vpdev = vdev->vpdev;
- struct vop_info *vi = dev_get_drvdata(&vpdev->dev);
- struct mic_bootparam *bootparam = vpdev->hw_ops->get_dp(vpdev);
- s8 db = bootparam->h2c_config_db;
-
- mutex_lock(&vi->vop_mutex);
- for (i = 0; i < vdev->dd->num_vq; i++)
- mutex_lock_nested(&vdev->vvr[i].vr_mutex, i + 1);
-
- if (db == -1 || vdev->dd->type == -1) {
- ret = -EIO;
- goto exit;
- }
-
- memcpy(mic_vq_configspace(vdev->dd), argp, vdev->dd->config_len);
- vdev->dc->config_change = MIC_VIRTIO_PARAM_CONFIG_CHANGED;
- vpdev->hw_ops->send_intr(vpdev, db);
-
- for (retry = 100; retry--;) {
- ret = wait_event_timeout(wake, vdev->dc->guest_ack,
- msecs_to_jiffies(100));
- if (ret)
- break;
- }
-
- dev_dbg(vop_dev(vdev),
- "%s %d retry: %d\n", __func__, __LINE__, retry);
- vdev->dc->config_change = 0;
- vdev->dc->guest_ack = 0;
-exit:
- for (i = 0; i < vdev->dd->num_vq; i++)
- mutex_unlock(&vdev->vvr[i].vr_mutex);
- mutex_unlock(&vi->vop_mutex);
- return ret;
-}
-
-static int vop_copy_dp_entry(struct vop_vdev *vdev,
- struct mic_device_desc *argp, __u8 *type,
- struct mic_device_desc **devpage)
-{
- struct vop_device *vpdev = vdev->vpdev;
- struct mic_device_desc *devp;
- struct mic_vqconfig *vqconfig;
- int ret = 0, i;
- bool slot_found = false;
-
- vqconfig = mic_vq_config(argp);
- for (i = 0; i < argp->num_vq; i++) {
- if (le16_to_cpu(vqconfig[i].num) > MIC_MAX_VRING_ENTRIES) {
- ret = -EINVAL;
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, ret);
- goto exit;
- }
- }
-
- /* Find the first free device page entry */
- for (i = sizeof(struct mic_bootparam);
- i < MIC_DP_SIZE - mic_total_desc_size(argp);
- i += mic_total_desc_size(devp)) {
- devp = vpdev->hw_ops->get_dp(vpdev) + i;
- if (devp->type == 0 || devp->type == -1) {
- slot_found = true;
- break;
- }
- }
- if (!slot_found) {
- ret = -EINVAL;
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, ret);
- goto exit;
- }
- /*
- * Save off the type before doing the memcpy. Type will be set in the
- * end after completing all initialization for the new device.
- */
- *type = argp->type;
- argp->type = 0;
- memcpy(devp, argp, mic_desc_size(argp));
-
- *devpage = devp;
-exit:
- return ret;
-}
-
-static void vop_init_device_ctrl(struct vop_vdev *vdev,
- struct mic_device_desc *devpage)
-{
- struct mic_device_ctrl *dc;
-
- dc = (void *)devpage + mic_aligned_desc_size(devpage);
-
- dc->config_change = 0;
- dc->guest_ack = 0;
- dc->vdev_reset = 0;
- dc->host_ack = 0;
- dc->used_address_updated = 0;
- dc->c2h_vdev_db = -1;
- dc->h2c_vdev_db = -1;
- vdev->dc = dc;
-}
-
-static int vop_virtio_add_device(struct vop_vdev *vdev,
- struct mic_device_desc *argp)
-{
- struct vop_info *vi = vdev->vi;
- struct vop_device *vpdev = vi->vpdev;
- struct mic_device_desc *dd = NULL;
- struct mic_vqconfig *vqconfig;
- int vr_size, i, j, ret;
- u8 type = 0;
- s8 db = -1;
- char irqname[16];
- struct mic_bootparam *bootparam;
- u16 num;
- dma_addr_t vr_addr;
-
- bootparam = vpdev->hw_ops->get_dp(vpdev);
- init_waitqueue_head(&vdev->waitq);
- INIT_LIST_HEAD(&vdev->list);
- vdev->vpdev = vpdev;
-
- ret = vop_copy_dp_entry(vdev, argp, &type, &dd);
- if (ret) {
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, ret);
- return ret;
- }
-
- vop_init_device_ctrl(vdev, dd);
-
- vdev->dd = dd;
- vdev->virtio_id = type;
- vqconfig = mic_vq_config(dd);
- INIT_WORK(&vdev->virtio_bh_work, vop_bh_handler);
-
- for (i = 0; i < dd->num_vq; i++) {
- struct vop_vringh *vvr = &vdev->vvr[i];
- struct mic_vring *vr = &vdev->vvr[i].vring;
-
- num = le16_to_cpu(vqconfig[i].num);
- mutex_init(&vvr->vr_mutex);
- vr_size = PAGE_ALIGN(round_up(vring_size(num, MIC_VIRTIO_RING_ALIGN), 4) +
- sizeof(struct _mic_vring_info));
- vr->va = (void *)
- __get_free_pages(GFP_KERNEL | __GFP_ZERO,
- get_order(vr_size));
- if (!vr->va) {
- ret = -ENOMEM;
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, ret);
- goto err;
- }
- vr->len = vr_size;
- vr->info = vr->va + round_up(vring_size(num, MIC_VIRTIO_RING_ALIGN), 4);
- vr->info->magic = cpu_to_le32(MIC_MAGIC + vdev->virtio_id + i);
- vr_addr = dma_map_single(&vpdev->dev, vr->va, vr_size,
- DMA_BIDIRECTIONAL);
- if (dma_mapping_error(&vpdev->dev, vr_addr)) {
- free_pages((unsigned long)vr->va, get_order(vr_size));
- ret = -ENOMEM;
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, ret);
- goto err;
- }
- vqconfig[i].address = cpu_to_le64(vr_addr);
-
- vring_init(&vr->vr, num, vr->va, MIC_VIRTIO_RING_ALIGN);
- ret = vringh_init_kern(&vvr->vrh,
- *(u32 *)mic_vq_features(vdev->dd),
- num, false, vr->vr.desc, vr->vr.avail,
- vr->vr.used);
- if (ret) {
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, ret);
- goto err;
- }
- vringh_kiov_init(&vvr->riov, NULL, 0);
- vringh_kiov_init(&vvr->wiov, NULL, 0);
- vvr->head = USHRT_MAX;
- vvr->vdev = vdev;
- vvr->vrh.notify = _vop_notify;
- dev_dbg(&vpdev->dev,
- "%s %d index %d va %p info %p vr_size 0x%x\n",
- __func__, __LINE__, i, vr->va, vr->info, vr_size);
- vvr->buf = (void *)__get_free_pages(GFP_KERNEL,
- get_order(VOP_INT_DMA_BUF_SIZE));
- vvr->buf_da = dma_map_single(&vpdev->dev,
- vvr->buf, VOP_INT_DMA_BUF_SIZE,
- DMA_BIDIRECTIONAL);
- }
-
- snprintf(irqname, sizeof(irqname), "vop%dvirtio%d", vpdev->index,
- vdev->virtio_id);
- vdev->virtio_db = vpdev->hw_ops->next_db(vpdev);
- vdev->virtio_cookie = vpdev->hw_ops->request_irq(vpdev,
- _vop_virtio_intr_handler, irqname, vdev,
- vdev->virtio_db);
- if (IS_ERR(vdev->virtio_cookie)) {
- ret = PTR_ERR(vdev->virtio_cookie);
- dev_dbg(&vpdev->dev, "request irq failed\n");
- goto err;
- }
-
- vdev->dc->c2h_vdev_db = vdev->virtio_db;
-
- /*
- * Order the type update with previous stores. This write barrier
- * is paired with the corresponding read barrier before the uncached
- * system memory read of the type, on the card while scanning the
- * device page.
- */
- smp_wmb();
- dd->type = type;
- argp->type = type;
-
- if (bootparam) {
- db = bootparam->h2c_config_db;
- if (db != -1)
- vpdev->hw_ops->send_intr(vpdev, db);
- }
- dev_dbg(&vpdev->dev, "Added virtio id %d db %d\n", dd->type, db);
- return 0;
-err:
- vqconfig = mic_vq_config(dd);
- for (j = 0; j < i; j++) {
- struct vop_vringh *vvr = &vdev->vvr[j];
-
- dma_unmap_single(&vpdev->dev, le64_to_cpu(vqconfig[j].address),
- vvr->vring.len, DMA_BIDIRECTIONAL);
- free_pages((unsigned long)vvr->vring.va,
- get_order(vvr->vring.len));
- }
- return ret;
-}
-
-static void vop_dev_remove(struct vop_info *pvi, struct mic_device_ctrl *devp,
- struct vop_device *vpdev)
-{
- struct mic_bootparam *bootparam = vpdev->hw_ops->get_dp(vpdev);
- s8 db;
- int ret, retry;
- DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wake);
-
- devp->config_change = MIC_VIRTIO_PARAM_DEV_REMOVE;
- db = bootparam->h2c_config_db;
- if (db != -1)
- vpdev->hw_ops->send_intr(vpdev, db);
- else
- goto done;
- for (retry = 15; retry--;) {
- ret = wait_event_timeout(wake, devp->guest_ack,
- msecs_to_jiffies(1000));
- if (ret)
- break;
- }
-done:
- devp->config_change = 0;
- devp->guest_ack = 0;
-}
-
-static void vop_virtio_del_device(struct vop_vdev *vdev)
-{
- struct vop_info *vi = vdev->vi;
- struct vop_device *vpdev = vdev->vpdev;
- int i;
- struct mic_vqconfig *vqconfig;
- struct mic_bootparam *bootparam = vpdev->hw_ops->get_dp(vpdev);
-
- if (!bootparam)
- goto skip_hot_remove;
- vop_dev_remove(vi, vdev->dc, vpdev);
-skip_hot_remove:
- vpdev->hw_ops->free_irq(vpdev, vdev->virtio_cookie, vdev);
- flush_work(&vdev->virtio_bh_work);
- vqconfig = mic_vq_config(vdev->dd);
- for (i = 0; i < vdev->dd->num_vq; i++) {
- struct vop_vringh *vvr = &vdev->vvr[i];
-
- dma_unmap_single(&vpdev->dev,
- vvr->buf_da, VOP_INT_DMA_BUF_SIZE,
- DMA_BIDIRECTIONAL);
- free_pages((unsigned long)vvr->buf,
- get_order(VOP_INT_DMA_BUF_SIZE));
- vringh_kiov_cleanup(&vvr->riov);
- vringh_kiov_cleanup(&vvr->wiov);
- dma_unmap_single(&vpdev->dev, le64_to_cpu(vqconfig[i].address),
- vvr->vring.len, DMA_BIDIRECTIONAL);
- free_pages((unsigned long)vvr->vring.va,
- get_order(vvr->vring.len));
- }
- /*
- * Order the type update with previous stores. This write barrier
- * is paired with the corresponding read barrier before the uncached
- * system memory read of the type, on the card while scanning the
- * device page.
- */
- smp_wmb();
- vdev->dd->type = -1;
-}
-
-/*
- * vop_sync_dma - Wrapper for synchronous DMAs.
- *
- * @dev - The address of the pointer to the device instance used
- * for DMA registration.
- * @dst - destination DMA address.
- * @src - source DMA address.
- * @len - size of the transfer.
- *
- * Return DMA_SUCCESS on success
- */
-static int vop_sync_dma(struct vop_vdev *vdev, dma_addr_t dst, dma_addr_t src,
- size_t len)
-{
- int err = 0;
- struct dma_device *ddev;
- struct dma_async_tx_descriptor *tx;
- struct vop_info *vi = dev_get_drvdata(&vdev->vpdev->dev);
- struct dma_chan *vop_ch = vi->dma_ch;
-
- if (!vop_ch) {
- err = -EBUSY;
- goto error;
- }
- ddev = vop_ch->device;
- tx = ddev->device_prep_dma_memcpy(vop_ch, dst, src, len,
- DMA_PREP_FENCE);
- if (!tx) {
- err = -ENOMEM;
- goto error;
- } else {
- dma_cookie_t cookie;
-
- cookie = tx->tx_submit(tx);
- if (dma_submit_error(cookie)) {
- err = -ENOMEM;
- goto error;
- }
- dma_async_issue_pending(vop_ch);
- err = dma_sync_wait(vop_ch, cookie);
- }
-error:
- if (err)
- dev_err(&vi->vpdev->dev, "%s %d err %d\n",
- __func__, __LINE__, err);
- return err;
-}
-
-#define VOP_USE_DMA true
-
-/*
- * Initiates the copies across the PCIe bus from card memory to a user
- * space buffer. When transfers are done using DMA, source/destination
- * addresses and transfer length must follow the alignment requirements of
- * the MIC DMA engine.
- */
-static int vop_virtio_copy_to_user(struct vop_vdev *vdev, void __user *ubuf,
- size_t len, u64 daddr, size_t dlen,
- int vr_idx)
-{
- struct vop_device *vpdev = vdev->vpdev;
- void __iomem *dbuf = vpdev->hw_ops->remap(vpdev, daddr, len);
- struct vop_vringh *vvr = &vdev->vvr[vr_idx];
- struct vop_info *vi = dev_get_drvdata(&vpdev->dev);
- size_t dma_alignment;
- bool x200;
- size_t dma_offset, partlen;
- int err;
-
- if (!VOP_USE_DMA || !vi->dma_ch) {
- if (copy_to_user(ubuf, (void __force *)dbuf, len)) {
- err = -EFAULT;
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, err);
- goto err;
- }
- vdev->in_bytes += len;
- err = 0;
- goto err;
- }
-
- dma_alignment = 1 << vi->dma_ch->device->copy_align;
- x200 = is_dma_copy_aligned(vi->dma_ch->device, 1, 1, 1);
-
- dma_offset = daddr - round_down(daddr, dma_alignment);
- daddr -= dma_offset;
- len += dma_offset;
- /*
- * X100 uses DMA addresses as seen by the card so adding
- * the aperture base is not required for DMA. However x200
- * requires DMA addresses to be an offset into the bar so
- * add the aperture base for x200.
- */
- if (x200)
- daddr += vpdev->aper->pa;
- while (len) {
- partlen = min_t(size_t, len, VOP_INT_DMA_BUF_SIZE);
- err = vop_sync_dma(vdev, vvr->buf_da, daddr,
- ALIGN(partlen, dma_alignment));
- if (err) {
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, err);
- goto err;
- }
- if (copy_to_user(ubuf, vvr->buf + dma_offset,
- partlen - dma_offset)) {
- err = -EFAULT;
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, err);
- goto err;
- }
- daddr += partlen;
- ubuf += partlen;
- dbuf += partlen;
- vdev->in_bytes_dma += partlen;
- vdev->in_bytes += partlen;
- len -= partlen;
- dma_offset = 0;
- }
- err = 0;
-err:
- vpdev->hw_ops->unmap(vpdev, dbuf);
- dev_dbg(vop_dev(vdev),
- "%s: ubuf %p dbuf %p len 0x%zx vr_idx 0x%x\n",
- __func__, ubuf, dbuf, len, vr_idx);
- return err;
-}
-
-/*
- * Initiates copies across the PCIe bus from a user space buffer to card
- * memory. When transfers are done using DMA, source/destination addresses
- * and transfer length must follow the alignment requirements of the MIC
- * DMA engine.
- */
-static int vop_virtio_copy_from_user(struct vop_vdev *vdev, void __user *ubuf,
- size_t len, u64 daddr, size_t dlen,
- int vr_idx)
-{
- struct vop_device *vpdev = vdev->vpdev;
- void __iomem *dbuf = vpdev->hw_ops->remap(vpdev, daddr, len);
- struct vop_vringh *vvr = &vdev->vvr[vr_idx];
- struct vop_info *vi = dev_get_drvdata(&vdev->vpdev->dev);
- size_t dma_alignment;
- bool x200;
- size_t partlen;
- bool dma = VOP_USE_DMA && vi->dma_ch;
- int err = 0;
- size_t offset = 0;
-
- if (dma) {
- dma_alignment = 1 << vi->dma_ch->device->copy_align;
- x200 = is_dma_copy_aligned(vi->dma_ch->device, 1, 1, 1);
-
- if (daddr & (dma_alignment - 1)) {
- vdev->tx_dst_unaligned += len;
- dma = false;
- } else if (ALIGN(len, dma_alignment) > dlen) {
- vdev->tx_len_unaligned += len;
- dma = false;
- }
- }
-
- if (!dma)
- goto memcpy;
-
- /*
- * X100 uses DMA addresses as seen by the card so adding
- * the aperture base is not required for DMA. However x200
- * requires DMA addresses to be an offset into the bar so
- * add the aperture base for x200.
- */
- if (x200)
- daddr += vpdev->aper->pa;
- while (len) {
- partlen = min_t(size_t, len, VOP_INT_DMA_BUF_SIZE);
-
- if (copy_from_user(vvr->buf, ubuf, partlen)) {
- err = -EFAULT;
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, err);
- goto err;
- }
- err = vop_sync_dma(vdev, daddr, vvr->buf_da,
- ALIGN(partlen, dma_alignment));
- if (err) {
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, err);
- goto err;
- }
- daddr += partlen;
- ubuf += partlen;
- dbuf += partlen;
- vdev->out_bytes_dma += partlen;
- vdev->out_bytes += partlen;
- len -= partlen;
- }
-memcpy:
- /*
- * We are copying to IO below and should ideally use something
- * like copy_from_user_toio(..) if it existed.
- */
- while (len) {
- partlen = min_t(size_t, len, VOP_INT_DMA_BUF_SIZE);
-
- if (copy_from_user(vvr->buf, ubuf + offset, partlen)) {
- err = -EFAULT;
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, err);
- goto err;
- }
- memcpy_toio(dbuf + offset, vvr->buf, partlen);
- offset += partlen;
- vdev->out_bytes += partlen;
- len -= partlen;
- }
- err = 0;
-err:
- vpdev->hw_ops->unmap(vpdev, dbuf);
- dev_dbg(vop_dev(vdev),
- "%s: ubuf %p dbuf %p len 0x%zx vr_idx 0x%x\n",
- __func__, ubuf, dbuf, len, vr_idx);
- return err;
-}
-
-#define MIC_VRINGH_READ true
-
-/* Determine the total number of bytes consumed in a VRINGH KIOV */
-static inline u32 vop_vringh_iov_consumed(struct vringh_kiov *iov)
-{
- int i;
- u32 total = iov->consumed;
-
- for (i = 0; i < iov->i; i++)
- total += iov->iov[i].iov_len;
- return total;
-}
-
-/*
- * Traverse the VRINGH KIOV and issue the APIs to trigger the copies.
- * This API is heavily based on the vringh_iov_xfer(..) implementation
- * in vringh.c. The reason we cannot reuse vringh_iov_pull_kern(..)
- * and vringh_iov_push_kern(..) directly is because there is no
- * way to override the VRINGH xfer(..) routines as of v3.10.
- */
-static int vop_vringh_copy(struct vop_vdev *vdev, struct vringh_kiov *iov,
- void __user *ubuf, size_t len, bool read, int vr_idx,
- size_t *out_len)
-{
- int ret = 0;
- size_t partlen, tot_len = 0;
-
- while (len && iov->i < iov->used) {
- struct kvec *kiov = &iov->iov[iov->i];
- unsigned long daddr = (unsigned long)kiov->iov_base;
-
- partlen = min(kiov->iov_len, len);
- if (read)
- ret = vop_virtio_copy_to_user(vdev, ubuf, partlen,
- daddr,
- kiov->iov_len,
- vr_idx);
- else
- ret = vop_virtio_copy_from_user(vdev, ubuf, partlen,
- daddr,
- kiov->iov_len,
- vr_idx);
- if (ret) {
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, ret);
- break;
- }
- len -= partlen;
- ubuf += partlen;
- tot_len += partlen;
- iov->consumed += partlen;
- kiov->iov_len -= partlen;
- kiov->iov_base += partlen;
- if (!kiov->iov_len) {
- /* Fix up old iov element then increment. */
- kiov->iov_len = iov->consumed;
- kiov->iov_base -= iov->consumed;
-
- iov->consumed = 0;
- iov->i++;
- }
- }
- *out_len = tot_len;
- return ret;
-}
-
-/*
- * Use the standard VRINGH infrastructure in the kernel to fetch new
- * descriptors, initiate the copies and update the used ring.
- */
-static int _vop_virtio_copy(struct vop_vdev *vdev, struct mic_copy_desc *copy)
-{
- int ret = 0;
- u32 iovcnt = copy->iovcnt;
- struct iovec iov;
- struct iovec __user *u_iov = copy->iov;
- void __user *ubuf = NULL;
- struct vop_vringh *vvr = &vdev->vvr[copy->vr_idx];
- struct vringh_kiov *riov = &vvr->riov;
- struct vringh_kiov *wiov = &vvr->wiov;
- struct vringh *vrh = &vvr->vrh;
- u16 *head = &vvr->head;
- struct mic_vring *vr = &vvr->vring;
- size_t len = 0, out_len;
-
- copy->out_len = 0;
- /* Fetch a new IOVEC if all previous elements have been processed */
- if (riov->i == riov->used && wiov->i == wiov->used) {
- ret = vringh_getdesc_kern(vrh, riov, wiov,
- head, GFP_KERNEL);
- /* Check if there are available descriptors */
- if (ret <= 0)
- return ret;
- }
- while (iovcnt) {
- if (!len) {
- /* Copy over a new iovec from user space. */
- ret = copy_from_user(&iov, u_iov, sizeof(*u_iov));
- if (ret) {
- ret = -EINVAL;
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, ret);
- break;
- }
- len = iov.iov_len;
- ubuf = iov.iov_base;
- }
- /* Issue all the read descriptors first */
- ret = vop_vringh_copy(vdev, riov, ubuf, len,
- MIC_VRINGH_READ, copy->vr_idx, &out_len);
- if (ret) {
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, ret);
- break;
- }
- len -= out_len;
- ubuf += out_len;
- copy->out_len += out_len;
- /* Issue the write descriptors next */
- ret = vop_vringh_copy(vdev, wiov, ubuf, len,
- !MIC_VRINGH_READ, copy->vr_idx, &out_len);
- if (ret) {
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, ret);
- break;
- }
- len -= out_len;
- ubuf += out_len;
- copy->out_len += out_len;
- if (!len) {
- /* One user space iovec is now completed */
- iovcnt--;
- u_iov++;
- }
- /* Exit loop if all elements in KIOVs have been processed. */
- if (riov->i == riov->used && wiov->i == wiov->used)
- break;
- }
- /*
- * Update the used ring if a descriptor was available and some data was
- * copied in/out and the user asked for a used ring update.
- */
- if (*head != USHRT_MAX && copy->out_len && copy->update_used) {
- u32 total = 0;
-
- /* Determine the total data consumed */
- total += vop_vringh_iov_consumed(riov);
- total += vop_vringh_iov_consumed(wiov);
- vringh_complete_kern(vrh, *head, total);
- *head = USHRT_MAX;
- if (vringh_need_notify_kern(vrh) > 0)
- vringh_notify(vrh);
- vringh_kiov_cleanup(riov);
- vringh_kiov_cleanup(wiov);
- /* Update avail idx for user space */
- vr->info->avail_idx = vrh->last_avail_idx;
- }
- return ret;
-}
-
-static inline int vop_verify_copy_args(struct vop_vdev *vdev,
- struct mic_copy_desc *copy)
-{
- if (!vdev || copy->vr_idx >= vdev->dd->num_vq)
- return -EINVAL;
- return 0;
-}
-
-/* Copy a specified number of virtio descriptors in a chain */
-static int vop_virtio_copy_desc(struct vop_vdev *vdev,
- struct mic_copy_desc *copy)
-{
- int err;
- struct vop_vringh *vvr;
-
- err = vop_verify_copy_args(vdev, copy);
- if (err)
- return err;
-
- vvr = &vdev->vvr[copy->vr_idx];
- mutex_lock(&vvr->vr_mutex);
- if (!vop_vdevup(vdev)) {
- err = -ENODEV;
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, err);
- goto err;
- }
- err = _vop_virtio_copy(vdev, copy);
- if (err) {
- dev_err(vop_dev(vdev), "%s %d err %d\n",
- __func__, __LINE__, err);
- }
-err:
- mutex_unlock(&vvr->vr_mutex);
- return err;
-}
-
-static int vop_open(struct inode *inode, struct file *f)
-{
- struct vop_vdev *vdev;
- struct vop_info *vi = container_of(f->private_data,
- struct vop_info, miscdev);
-
- vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
- if (!vdev)
- return -ENOMEM;
- vdev->vi = vi;
- mutex_init(&vdev->vdev_mutex);
- f->private_data = vdev;
- init_completion(&vdev->destroy);
- complete(&vdev->destroy);
- return 0;
-}
-
-static int vop_release(struct inode *inode, struct file *f)
-{
- struct vop_vdev *vdev = f->private_data, *vdev_tmp;
- struct vop_info *vi = vdev->vi;
- struct list_head *pos, *tmp;
- bool found = false;
-
- mutex_lock(&vdev->vdev_mutex);
- if (vdev->deleted)
- goto unlock;
- mutex_lock(&vi->vop_mutex);
- list_for_each_safe(pos, tmp, &vi->vdev_list) {
- vdev_tmp = list_entry(pos, struct vop_vdev, list);
- if (vdev == vdev_tmp) {
- vop_virtio_del_device(vdev);
- list_del(pos);
- found = true;
- break;
- }
- }
- mutex_unlock(&vi->vop_mutex);
-unlock:
- mutex_unlock(&vdev->vdev_mutex);
- if (!found)
- wait_for_completion(&vdev->destroy);
- f->private_data = NULL;
- kfree(vdev);
- return 0;
-}
-
-static long vop_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
-{
- struct vop_vdev *vdev = f->private_data;
- struct vop_info *vi = vdev->vi;
- void __user *argp = (void __user *)arg;
- int ret;
-
- switch (cmd) {
- case MIC_VIRTIO_ADD_DEVICE:
- {
- struct mic_device_desc dd, *dd_config;
-
- if (copy_from_user(&dd, argp, sizeof(dd)))
- return -EFAULT;
-
- if (mic_aligned_desc_size(&dd) > MIC_MAX_DESC_BLK_SIZE ||
- dd.num_vq > MIC_MAX_VRINGS)
- return -EINVAL;
-
- dd_config = memdup_user(argp, mic_desc_size(&dd));
- if (IS_ERR(dd_config))
- return PTR_ERR(dd_config);
-
- /* Ensure desc has not changed between the two reads */
- if (memcmp(&dd, dd_config, sizeof(dd))) {
- ret = -EINVAL;
- goto free_ret;
- }
- mutex_lock(&vdev->vdev_mutex);
- mutex_lock(&vi->vop_mutex);
- ret = vop_virtio_add_device(vdev, dd_config);
- if (ret)
- goto unlock_ret;
- list_add_tail(&vdev->list, &vi->vdev_list);
-unlock_ret:
- mutex_unlock(&vi->vop_mutex);
- mutex_unlock(&vdev->vdev_mutex);
-free_ret:
- kfree(dd_config);
- return ret;
- }
- case MIC_VIRTIO_COPY_DESC:
- {
- struct mic_copy_desc copy;
-
- mutex_lock(&vdev->vdev_mutex);
- ret = vop_vdev_inited(vdev);
- if (ret)
- goto _unlock_ret;
-
- if (copy_from_user(©, argp, sizeof(copy))) {
- ret = -EFAULT;
- goto _unlock_ret;
- }
-
- ret = vop_virtio_copy_desc(vdev, ©);
- if (ret < 0)
- goto _unlock_ret;
- if (copy_to_user(
- &((struct mic_copy_desc __user *)argp)->out_len,
- ©.out_len, sizeof(copy.out_len)))
- ret = -EFAULT;
-_unlock_ret:
- mutex_unlock(&vdev->vdev_mutex);
- return ret;
- }
- case MIC_VIRTIO_CONFIG_CHANGE:
- {
- void *buf;
-
- mutex_lock(&vdev->vdev_mutex);
- ret = vop_vdev_inited(vdev);
- if (ret)
- goto __unlock_ret;
- buf = memdup_user(argp, vdev->dd->config_len);
- if (IS_ERR(buf)) {
- ret = PTR_ERR(buf);
- goto __unlock_ret;
- }
- ret = vop_virtio_config_change(vdev, buf);
- kfree(buf);
-__unlock_ret:
- mutex_unlock(&vdev->vdev_mutex);
- return ret;
- }
- default:
- return -ENOIOCTLCMD;
- };
- return 0;
-}
-
-/*
- * We return EPOLLIN | EPOLLOUT from poll when new buffers are enqueued, and
- * not when previously enqueued buffers may be available. This means that
- * in the card->host (TX) path, when userspace is unblocked by poll it
- * must drain all available descriptors or it can stall.
- */
-static __poll_t vop_poll(struct file *f, poll_table *wait)
-{
- struct vop_vdev *vdev = f->private_data;
- __poll_t mask = 0;
-
- mutex_lock(&vdev->vdev_mutex);
- if (vop_vdev_inited(vdev)) {
- mask = EPOLLERR;
- goto done;
- }
- poll_wait(f, &vdev->waitq, wait);
- if (vop_vdev_inited(vdev)) {
- mask = EPOLLERR;
- } else if (vdev->poll_wake) {
- vdev->poll_wake = 0;
- mask = EPOLLIN | EPOLLOUT;
- }
-done:
- mutex_unlock(&vdev->vdev_mutex);
- return mask;
-}
-
-static inline int
-vop_query_offset(struct vop_vdev *vdev, unsigned long offset,
- unsigned long *size, unsigned long *pa)
-{
- struct vop_device *vpdev = vdev->vpdev;
- unsigned long start = MIC_DP_SIZE;
- int i;
-
- /*
- * MMAP interface is as follows:
- * offset region
- * 0x0 virtio device_page
- * 0x1000 first vring
- * 0x1000 + size of 1st vring second vring
- * ....
- */
- if (!offset) {
- *pa = virt_to_phys(vpdev->hw_ops->get_dp(vpdev));
- *size = MIC_DP_SIZE;
- return 0;
- }
-
- for (i = 0; i < vdev->dd->num_vq; i++) {
- struct vop_vringh *vvr = &vdev->vvr[i];
-
- if (offset == start) {
- *pa = virt_to_phys(vvr->vring.va);
- *size = vvr->vring.len;
- return 0;
- }
- start += vvr->vring.len;
- }
- return -1;
-}
-
-/*
- * Maps the device page and virtio rings to user space for readonly access.
- */
-static int vop_mmap(struct file *f, struct vm_area_struct *vma)
-{
- struct vop_vdev *vdev = f->private_data;
- unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
- unsigned long pa, size = vma->vm_end - vma->vm_start, size_rem = size;
- int i, err;
-
- err = vop_vdev_inited(vdev);
- if (err)
- goto ret;
- if (vma->vm_flags & VM_WRITE) {
- err = -EACCES;
- goto ret;
- }
- while (size_rem) {
- i = vop_query_offset(vdev, offset, &size, &pa);
- if (i < 0) {
- err = -EINVAL;
- goto ret;
- }
- err = remap_pfn_range(vma, vma->vm_start + offset,
- pa >> PAGE_SHIFT, size,
- vma->vm_page_prot);
- if (err)
- goto ret;
- size_rem -= size;
- offset += size;
- }
-ret:
- return err;
-}
-
-static const struct file_operations vop_fops = {
- .open = vop_open,
- .release = vop_release,
- .unlocked_ioctl = vop_ioctl,
- .poll = vop_poll,
- .mmap = vop_mmap,
- .owner = THIS_MODULE,
-};
-
-int vop_host_init(struct vop_info *vi)
-{
- int rc;
- struct miscdevice *mdev;
- struct vop_device *vpdev = vi->vpdev;
-
- INIT_LIST_HEAD(&vi->vdev_list);
- vi->dma_ch = vpdev->dma_ch;
- mdev = &vi->miscdev;
- mdev->minor = MISC_DYNAMIC_MINOR;
- snprintf(vi->name, sizeof(vi->name), "vop_virtio%d", vpdev->index);
- mdev->name = vi->name;
- mdev->fops = &vop_fops;
- mdev->parent = &vpdev->dev;
-
- rc = misc_register(mdev);
- if (rc)
- dev_err(&vpdev->dev, "%s failed rc %d\n", __func__, rc);
- return rc;
-}
-
-void vop_host_uninit(struct vop_info *vi)
-{
- struct list_head *pos, *tmp;
- struct vop_vdev *vdev;
-
- mutex_lock(&vi->vop_mutex);
- vop_virtio_reset_devices(vi);
- list_for_each_safe(pos, tmp, &vi->vdev_list) {
- vdev = list_entry(pos, struct vop_vdev, list);
- list_del(pos);
- reinit_completion(&vdev->destroy);
- mutex_unlock(&vi->vop_mutex);
- mutex_lock(&vdev->vdev_mutex);
- vop_virtio_del_device(vdev);
- vdev->deleted = true;
- mutex_unlock(&vdev->vdev_mutex);
- complete(&vdev->destroy);
- mutex_lock(&vi->vop_mutex);
- }
- mutex_unlock(&vi->vop_mutex);
- misc_deregister(&vi->miscdev);
-}
* Copyright (c) 2007 Freescale Semiconductor, Inc.
* Copyright (c) 2009 MontaVista Software, Inc.
* Copyright (c) 2010 Pengutronix e.K.
+ * Copyright 2020 NXP
* Author: Wolfram Sang <kernel@pengutronix.de>
*/
/* DLL Config 0 Register */
#define ESDHC_DLLCFG0 0x160
#define ESDHC_DLL_ENABLE 0x80000000
+#define ESDHC_DLL_RESET 0x40000000
#define ESDHC_DLL_FREQ_SEL 0x08000000
/* DLL Config 1 Register */
*
* Copyright (c) 2007, 2010, 2012 Freescale Semiconductor, Inc.
* Copyright (c) 2009 MontaVista Software, Inc.
+ * Copyright 2020 NXP
*
* Authors: Xiaobo Xie <X.Xie@freescale.com>
* Anton Vorontsov <avorontsov@ru.mvista.com>
#include <linux/clk.h>
#include <linux/ktime.h>
#include <linux/dma-mapping.h>
+#include <linux/iopoll.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include "sdhci-pltfm.h"
if (host->mmc->actual_clock == MMC_HS200_MAX_DTR)
temp |= ESDHC_DLL_FREQ_SEL;
sdhci_writel(host, temp, ESDHC_DLLCFG0);
+
+ temp |= ESDHC_DLL_RESET;
+ sdhci_writel(host, temp, ESDHC_DLLCFG0);
+ udelay(1);
+ temp &= ~ESDHC_DLL_RESET;
+ sdhci_writel(host, temp, ESDHC_DLLCFG0);
+
+ /* Wait max 20 ms */
+ if (read_poll_timeout(sdhci_readl, temp,
+ temp & ESDHC_DLL_STS_SLV_LOCK,
+ 10, 20000, false,
+ host, ESDHC_DLLSTAT0))
+ pr_err("%s: timeout for delay chain lock.\n",
+ mmc_hostname(host->mmc));
+
temp = sdhci_readl(host, ESDHC_TBCTL);
sdhci_writel(host, temp | ESDHC_HS400_WNDW_ADJUST, ESDHC_TBCTL);
esdhc_tuning_block_enable(host, true);
+ /*
+ * The eSDHC controller takes the data timeout value into account
+ * during tuning. If the SD card is too slow sending the response, the
+ * timer will expire and a "Buffer Read Ready" interrupt without data
+ * is triggered. This leads to tuning errors.
+ *
+ * Just set the timeout to the maximum value because the core will
+ * already take care of it in sdhci_send_tuning().
+ */
+ sdhci_writeb(host, 0xe, SDHCI_TIMEOUT_CONTROL);
+
hs400_tuning = host->flags & SDHCI_HS400_TUNING;
do {
/*
* In case of Version 4.10 or later, use of 'Auto CMD Auto
* Select' is recommended rather than use of 'Auto CMD12
- * Enable' or 'Auto CMD23 Enable'.
+ * Enable' or 'Auto CMD23 Enable'. We require Version 4 Mode
+ * here because some controllers (e.g sdhci-of-dwmshc) expect it.
*/
- if (host->version >= SDHCI_SPEC_410 && (use_cmd12 || use_cmd23)) {
+ if (host->version >= SDHCI_SPEC_410 && host->v4_mode &&
+ (use_cmd12 || use_cmd23)) {
*mode |= SDHCI_TRNS_AUTO_SEL;
ctrl2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
schedule_work(&bp->sp_task);
}
-static void bnxt_cancel_sp_work(struct bnxt *bp)
-{
- if (BNXT_PF(bp)) {
- flush_workqueue(bnxt_pf_wq);
- } else {
- cancel_work_sync(&bp->sp_task);
- cancel_delayed_work_sync(&bp->fw_reset_task);
- }
-}
-
static void bnxt_sched_reset(struct bnxt *bp, struct bnxt_rx_ring_info *rxr)
{
if (!rxr->bnapi->in_reset) {
u32 bar_offset = BNXT_GRCPF_REG_CHIMP_COMM;
u16 dst = BNXT_HWRM_CHNL_CHIMP;
- if (BNXT_NO_FW_ACCESS(bp))
+ if (BNXT_NO_FW_ACCESS(bp) &&
+ le16_to_cpu(req->req_type) != HWRM_FUNC_RESET)
return -EBUSY;
if (msg_len > BNXT_HWRM_MAX_REQ_LEN) {
{
int rc = 0;
- rc = __bnxt_open_nic(bp, irq_re_init, link_re_init);
+ if (test_bit(BNXT_STATE_ABORT_ERR, &bp->state))
+ rc = -EIO;
+ if (!rc)
+ rc = __bnxt_open_nic(bp, irq_re_init, link_re_init);
if (rc) {
netdev_err(bp->dev, "nic open fail (rc: %x)\n", rc);
dev_close(bp->dev);
if (BNXT_PF(bp))
bnxt_sriov_disable(bp);
- clear_bit(BNXT_STATE_IN_FW_RESET, &bp->state);
- bnxt_cancel_sp_work(bp);
- bp->sp_event = 0;
-
- bnxt_dl_fw_reporters_destroy(bp, true);
if (BNXT_PF(bp))
devlink_port_type_clear(&bp->dl_port);
pci_disable_pcie_error_reporting(pdev);
unregister_netdev(dev);
+ clear_bit(BNXT_STATE_IN_FW_RESET, &bp->state);
+ /* Flush any pending tasks */
+ cancel_work_sync(&bp->sp_task);
+ cancel_delayed_work_sync(&bp->fw_reset_task);
+ bp->sp_event = 0;
+
+ bnxt_dl_fw_reporters_destroy(bp, true);
bnxt_dl_unregister(bp);
bnxt_shutdown_tc(bp);
return PCI_ERS_RESULT_DISCONNECT;
}
+ if (state == pci_channel_io_frozen)
+ set_bit(BNXT_STATE_PCI_CHANNEL_IO_FROZEN, &bp->state);
+
if (netif_running(netdev))
bnxt_close(netdev);
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct bnxt *bp = netdev_priv(netdev);
- int err = 0;
+ int err = 0, off;
pci_ers_result_t result = PCI_ERS_RESULT_DISCONNECT;
netdev_info(bp->dev, "PCI Slot Reset\n");
"Cannot re-enable PCI device after reset.\n");
} else {
pci_set_master(pdev);
+ /* Upon fatal error, our device internal logic that latches to
+ * BAR value is getting reset and will restore only upon
+ * rewritting the BARs.
+ *
+ * As pci_restore_state() does not re-write the BARs if the
+ * value is same as saved value earlier, driver needs to
+ * write the BARs to 0 to force restore, in case of fatal error.
+ */
+ if (test_and_clear_bit(BNXT_STATE_PCI_CHANNEL_IO_FROZEN,
+ &bp->state)) {
+ for (off = PCI_BASE_ADDRESS_0;
+ off <= PCI_BASE_ADDRESS_5; off += 4)
+ pci_write_config_dword(bp->pdev, off, 0);
+ }
pci_restore_state(pdev);
pci_save_state(pdev);
#define BNXT_STATE_ABORT_ERR 5
#define BNXT_STATE_FW_FATAL_COND 6
#define BNXT_STATE_DRV_REGISTERED 7
+#define BNXT_STATE_PCI_CHANNEL_IO_FROZEN 8
#define BNXT_NO_FW_ACCESS(bp) \
(test_bit(BNXT_STATE_FW_FATAL_COND, &(bp)->state) || \
int err;
/* do a set-tcb for smac-sel and CWR bit.. */
- err = set_tcb_tflag(adap, f, f->tid, TF_CCTRL_CWR_S, 1, 1);
- if (err)
- goto smac_err;
-
err = set_tcb_field(adap, f, f->tid, TCB_SMAC_SEL_W,
TCB_SMAC_SEL_V(TCB_SMAC_SEL_M),
TCB_SMAC_SEL_V(f->smt->idx), 1);
+ if (err)
+ goto smac_err;
+
+ err = set_tcb_tflag(adap, f, f->tid, TF_CCTRL_CWR_S, 1, 1);
if (!err)
return 0;
FW_FILTER_WR_DIRSTEERHASH_V(f->fs.dirsteerhash) |
FW_FILTER_WR_LPBK_V(f->fs.action == FILTER_SWITCH) |
FW_FILTER_WR_DMAC_V(f->fs.newdmac) |
+ FW_FILTER_WR_SMAC_V(f->fs.newsmac) |
FW_FILTER_WR_INSVLAN_V(f->fs.newvlan == VLAN_INSERT ||
f->fs.newvlan == VLAN_REWRITE) |
FW_FILTER_WR_RMVLAN_V(f->fs.newvlan == VLAN_REMOVE ||
FW_FILTER_WR_OVLAN_VLD_V(f->fs.val.ovlan_vld) |
FW_FILTER_WR_IVLAN_VLDM_V(f->fs.mask.ivlan_vld) |
FW_FILTER_WR_OVLAN_VLDM_V(f->fs.mask.ovlan_vld));
- fwr->smac_sel = 0;
+ fwr->smac_sel = f->smt->idx;
fwr->rx_chan_rx_rpl_iq =
htons(FW_FILTER_WR_RX_CHAN_V(0) |
FW_FILTER_WR_RX_RPL_IQ_V(adapter->sge.fw_evtq.abs_id));
TX_QUEUE_V(f->fs.nat_mode) |
T5_OPT_2_VALID_F |
RX_CHANNEL_V(cxgb4_port_e2cchan(f->dev)) |
- CONG_CNTRL_V((f->fs.action == FILTER_DROP) |
- (f->fs.dirsteer << 1)) |
PACE_V((f->fs.maskhash) |
- ((f->fs.dirsteerhash) << 1)) |
- CCTRL_ECN_V(f->fs.action == FILTER_SWITCH));
+ ((f->fs.dirsteerhash) << 1)));
}
static void mk_act_open_req(struct filter_entry *f, struct sk_buff *skb,
TX_QUEUE_V(f->fs.nat_mode) |
T5_OPT_2_VALID_F |
RX_CHANNEL_V(cxgb4_port_e2cchan(f->dev)) |
- CONG_CNTRL_V((f->fs.action == FILTER_DROP) |
- (f->fs.dirsteer << 1)) |
PACE_V((f->fs.maskhash) |
- ((f->fs.dirsteerhash) << 1)) |
- CCTRL_ECN_V(f->fs.action == FILTER_SWITCH));
+ ((f->fs.dirsteerhash) << 1)));
}
static int cxgb4_set_hash_filter(struct net_device *dev,
}
return;
}
+ switch (f->fs.action) {
+ case FILTER_PASS:
+ if (f->fs.dirsteer)
+ set_tcb_tflag(adap, f, tid,
+ TF_DIRECT_STEER_S, 1, 1);
+ break;
+ case FILTER_DROP:
+ set_tcb_tflag(adap, f, tid, TF_DROP_S, 1, 1);
+ break;
+ case FILTER_SWITCH:
+ set_tcb_tflag(adap, f, tid, TF_LPBK_S, 1, 1);
+ break;
+ }
+
break;
default:
if (ctx)
ctx->result = 0;
} else if (ret == FW_FILTER_WR_FLT_ADDED) {
- int err = 0;
-
- if (f->fs.newsmac)
- err = configure_filter_smac(adap, f);
-
- if (!err) {
- f->pending = 0; /* async setup completed */
- f->valid = 1;
- if (ctx) {
- ctx->result = 0;
- ctx->tid = idx;
- }
- } else {
- clear_filter(adap, f);
- if (ctx)
- ctx->result = err;
+ f->pending = 0; /* async setup completed */
+ f->valid = 1;
+ if (ctx) {
+ ctx->result = 0;
+ ctx->tid = idx;
}
} else {
/* Something went wrong. Issue a warning about the
#define TCB_T_FLAGS_M 0xffffffffffffffffULL
#define TCB_T_FLAGS_V(x) ((__u64)(x) << TCB_T_FLAGS_S)
+#define TF_DROP_S 22
+#define TF_DIRECT_STEER_S 23
+#define TF_LPBK_S 59
+
#define TF_CCTRL_ECE_S 60
#define TF_CCTRL_CWR_S 61
#define TF_CCTRL_RFR_S 62
if (rpl->status != CPL_ERR_NONE) {
pr_info("Unexpected PASS_OPEN_RPL status %u for STID %u\n",
rpl->status, stid);
- return CPL_RET_BUF_DONE;
+ } else {
+ cxgb4_free_stid(cdev->tids, stid, listen_ctx->lsk->sk_family);
+ sock_put(listen_ctx->lsk);
+ kfree(listen_ctx);
+ module_put(THIS_MODULE);
}
- cxgb4_free_stid(cdev->tids, stid, listen_ctx->lsk->sk_family);
- sock_put(listen_ctx->lsk);
- kfree(listen_ctx);
- module_put(THIS_MODULE);
-
- return 0;
+ return CPL_RET_BUF_DONE;
}
static int chtls_close_listsrv_rpl(struct chtls_dev *cdev, struct sk_buff *skb)
if (rpl->status != CPL_ERR_NONE) {
pr_info("Unexpected CLOSE_LISTSRV_RPL status %u for STID %u\n",
rpl->status, stid);
- return CPL_RET_BUF_DONE;
+ } else {
+ cxgb4_free_stid(cdev->tids, stid, listen_ctx->lsk->sk_family);
+ sock_put(listen_ctx->lsk);
+ kfree(listen_ctx);
+ module_put(THIS_MODULE);
}
-
- cxgb4_free_stid(cdev->tids, stid, listen_ctx->lsk->sk_family);
- sock_put(listen_ctx->lsk);
- kfree(listen_ctx);
- module_put(THIS_MODULE);
-
- return 0;
+ return CPL_RET_BUF_DONE;
}
static void chtls_purge_wr_queue(struct sock *sk)
struct chtls_sock *csk = sk->sk_user_data;
local_bh_disable();
- bh_lock_sock(sk);
release_tcp_port(sk); /* release the port immediately */
spin_lock(&reap_list_lock);
if (!csk->passive_reap_next)
schedule_work(&reap_task);
spin_unlock(&reap_list_lock);
- bh_unlock_sock(sk);
local_bh_enable();
}
tp->urg_data = 0;
if ((avail + offset) >= skb->len) {
+ struct sk_buff *next_skb;
if (ULP_SKB_CB(skb)->flags & ULPCB_FLAG_TLS_HDR) {
tp->copied_seq += skb->len;
hws->rcvpld = skb->hdr_len;
chtls_free_skb(sk, skb);
buffers_freed++;
hws->copied_seq = 0;
- if (copied >= target &&
- !skb_peek(&sk->sk_receive_queue))
+ next_skb = skb_peek(&sk->sk_receive_queue);
+ if (copied >= target && !next_skb)
+ break;
+ if (ULP_SKB_CB(next_skb)->flags & ULPCB_FLAG_TLS_HDR)
break;
}
} while (len > 0);
u32 num_entries;
refcount_t refcount;
struct hlist_node node;
- struct action_gate_entry entries[0];
+ struct action_gate_entry entries[];
};
/* Only enable the green color frame now
(ugeth->phy_interface == PHY_INTERFACE_MODE_RTBI)) {
upsmr |= UCC_GETH_UPSMR_TBIM;
}
- if ((ugeth->phy_interface == PHY_INTERFACE_MODE_SGMII))
+ if (ugeth->phy_interface == PHY_INTERFACE_MODE_SGMII)
upsmr |= UCC_GETH_UPSMR_SGMM;
out_be32(&uf_regs->upsmr, upsmr);
struct gve_stats_report {
__be64 written_count;
- struct stats stats[0];
+ struct stats stats[];
};
static_assert(sizeof(struct gve_stats_report) == 8);
priv->tx_cfg.num_queues;
rx_stats_num = (GVE_RX_STATS_REPORT_NUM + NIC_RX_STATS_REPORT_NUM) *
priv->rx_cfg.num_queues;
- priv->stats_report_len = sizeof(struct gve_stats_report) +
- (tx_stats_num + rx_stats_num) *
- sizeof(struct stats);
+ priv->stats_report_len = struct_size(priv->stats_report, stats,
+ tx_stats_num + rx_stats_num);
priv->stats_report =
dma_alloc_coherent(&priv->pdev->dev, priv->stats_report_len,
&priv->stats_report_bus, GFP_KERNEL);
return ret;
}
- return ret;
+ return 0;
}
int hclge_pause_setup_hw(struct hclge_dev *hdev, bool init)
hclgevf_uninit_msi(hdev);
}
- hclgevf_pci_uninit(hdev);
hclgevf_cmd_uninit(hdev);
+ hclgevf_pci_uninit(hdev);
hclgevf_uninit_mac_list(hdev);
}
ret = -EOPNOTSUPP;
}
- if (!ether_addr_equal(ether_header->h_source, netdev->dev_addr)) {
- netdev_dbg(netdev, "source packet MAC address does not match veth device's, dropping packet.\n");
- netdev->stats.tx_dropped++;
- ret = -EOPNOTSUPP;
- }
-
return ret;
}
int rc;
rc = 0;
- ether_addr_copy(adapter->mac_addr, addr->sa_data);
- if (adapter->state != VNIC_PROBED)
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ if (adapter->state != VNIC_PROBED) {
+ ether_addr_copy(adapter->mac_addr, addr->sa_data);
rc = __ibmvnic_set_mac(netdev, addr->sa_data);
+ }
return rc;
}
u32 key_type, u32 *p_key_id);
void mlx5_destroy_encryption_key(struct mlx5_core_dev *mdev, u32 key_id);
-static inline struct net *mlx5_core_net(struct mlx5_core_dev *dev)
-{
- return devlink_net(priv_to_devlink(dev));
-}
-
#endif
err = mlxsw_emad_transmit(trans->core, trans);
if (err == 0)
return;
+
+ if (!atomic_dec_and_test(&trans->active))
+ return;
} else {
err = -EIO;
}
if (!reload)
devlink_resources_unregister(devlink, NULL);
mlxsw_core->bus->fini(mlxsw_core->bus_priv);
+ if (!reload)
+ devlink_free(devlink);
return;
u32 eth_proto_cap, eth_proto_admin, eth_proto_oper;
const struct mlxsw_sp_port_type_speed_ops *ops;
char ptys_pl[MLXSW_REG_PTYS_LEN];
+ u32 eth_proto_cap_masked;
int err;
ops = mlxsw_sp->port_type_speed_ops;
- /* Set advertised speeds to supported speeds. */
+ /* Set advertised speeds to speeds supported by both the driver
+ * and the device.
+ */
ops->reg_ptys_eth_pack(mlxsw_sp, ptys_pl, mlxsw_sp_port->local_port,
0, false);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ptys), ptys_pl);
ops->reg_ptys_eth_unpack(mlxsw_sp, ptys_pl, ð_proto_cap,
ð_proto_admin, ð_proto_oper);
+ eth_proto_cap_masked = ops->ptys_proto_cap_masked_get(eth_proto_cap);
ops->reg_ptys_eth_pack(mlxsw_sp, ptys_pl, mlxsw_sp_port->local_port,
- eth_proto_cap, mlxsw_sp_port->link.autoneg);
+ eth_proto_cap_masked,
+ mlxsw_sp_port->link.autoneg);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptys), ptys_pl);
}
u32 *p_eth_proto_cap,
u32 *p_eth_proto_admin,
u32 *p_eth_proto_oper);
+ u32 (*ptys_proto_cap_masked_get)(u32 eth_proto_cap);
};
static inline struct net_device *
p_eth_proto_oper);
}
+static u32 mlxsw_sp1_ptys_proto_cap_masked_get(u32 eth_proto_cap)
+{
+ u32 ptys_proto_cap_masked = 0;
+ int i;
+
+ for (i = 0; i < MLXSW_SP1_PORT_LINK_MODE_LEN; i++) {
+ if (mlxsw_sp1_port_link_mode[i].mask & eth_proto_cap)
+ ptys_proto_cap_masked |=
+ mlxsw_sp1_port_link_mode[i].mask;
+ }
+
+ return ptys_proto_cap_masked;
+}
+
const struct mlxsw_sp_port_type_speed_ops mlxsw_sp1_port_type_speed_ops = {
.from_ptys_supported_port = mlxsw_sp1_from_ptys_supported_port,
.from_ptys_link = mlxsw_sp1_from_ptys_link,
.to_ptys_speed = mlxsw_sp1_to_ptys_speed,
.reg_ptys_eth_pack = mlxsw_sp1_reg_ptys_eth_pack,
.reg_ptys_eth_unpack = mlxsw_sp1_reg_ptys_eth_unpack,
+ .ptys_proto_cap_masked_get = mlxsw_sp1_ptys_proto_cap_masked_get,
};
static const enum ethtool_link_mode_bit_indices
p_eth_proto_admin, p_eth_proto_oper);
}
+static u32 mlxsw_sp2_ptys_proto_cap_masked_get(u32 eth_proto_cap)
+{
+ u32 ptys_proto_cap_masked = 0;
+ int i;
+
+ for (i = 0; i < MLXSW_SP2_PORT_LINK_MODE_LEN; i++) {
+ if (mlxsw_sp2_port_link_mode[i].mask & eth_proto_cap)
+ ptys_proto_cap_masked |=
+ mlxsw_sp2_port_link_mode[i].mask;
+ }
+
+ return ptys_proto_cap_masked;
+}
+
const struct mlxsw_sp_port_type_speed_ops mlxsw_sp2_port_type_speed_ops = {
.from_ptys_supported_port = mlxsw_sp2_from_ptys_supported_port,
.from_ptys_link = mlxsw_sp2_from_ptys_link,
.to_ptys_speed = mlxsw_sp2_to_ptys_speed,
.reg_ptys_eth_pack = mlxsw_sp2_reg_ptys_eth_pack,
.reg_ptys_eth_unpack = mlxsw_sp2_reg_ptys_eth_unpack,
+ .ptys_proto_cap_masked_get = mlxsw_sp2_ptys_proto_cap_masked_get,
};
union ionic_dev_cmd cmd = {
.vf_setattr.opcode = IONIC_CMD_VF_SETATTR,
.vf_setattr.attr = attr,
- .vf_setattr.vf_index = vf,
+ .vf_setattr.vf_index = cpu_to_le16(vf),
};
int err;
{
union ionic_dev_cmd cmd = {
.q_identify.opcode = IONIC_CMD_Q_IDENTIFY,
- .q_identify.lif_type = lif_type,
+ .q_identify.lif_type = cpu_to_le16(lif_type),
.q_identify.type = qtype,
.q_identify.ver = qver,
};
int res_index;
};
+#ifndef __CHECKER__
/* Registers */
static_assert(sizeof(struct ionic_intr) == 32);
static_assert(sizeof(struct ionic_vf_setattr_comp) == 16);
static_assert(sizeof(struct ionic_vf_getattr_cmd) == 64);
static_assert(sizeof(struct ionic_vf_getattr_comp) == 16);
+#endif /* __CHECKER__ */
struct ionic_devinfo {
u8 asic_type;
{
union ionic_dev_cmd cmd = {
.fw_download.opcode = IONIC_CMD_FW_DOWNLOAD,
- .fw_download.offset = offset,
- .fw_download.addr = addr,
- .fw_download.length = length
+ .fw_download.offset = cpu_to_le32(offset),
+ .fw_download.addr = cpu_to_le64(addr),
+ .fw_download.length = cpu_to_le32(length),
};
ionic_dev_cmd_go(idev, &cmd);
if (lif->rxqcqs) {
for (i = 0; i < lif->nxqs && lif->rxqcqs[i]; i++) {
ionic_lif_qcq_deinit(lif, lif->rxqcqs[i]);
- ionic_rx_flush(&lif->rxqcqs[i]->cq);
ionic_rx_empty(&lif->rxqcqs[i]->q);
}
}
ret = -EINVAL;
} else {
ivf->vf = vf;
- ivf->vlan = ionic->vfs[vf].vlanid;
+ ivf->vlan = le16_to_cpu(ionic->vfs[vf].vlanid);
ivf->qos = 0;
ivf->spoofchk = ionic->vfs[vf].spoofchk;
ivf->linkstate = ionic->vfs[vf].linkstate;
- ivf->max_tx_rate = ionic->vfs[vf].maxrate;
+ ivf->max_tx_rate = le32_to_cpu(ionic->vfs[vf].maxrate);
ivf->trusted = ionic->vfs[vf].trusted;
ether_addr_copy(ivf->mac, ionic->vfs[vf].macaddr);
}
ret = ionic_set_vf_config(ionic, vf,
IONIC_VF_ATTR_VLAN, (u8 *)&vlan);
if (!ret)
- ionic->vfs[vf].vlanid = vlan;
+ ionic->vfs[vf].vlanid = cpu_to_le16(vlan);
}
up_write(&ionic->vf_op_lock);
ret = ionic_set_vf_config(ionic, vf,
IONIC_VF_ATTR_RATE, (u8 *)&tx_max);
if (!ret)
- lif->ionic->vfs[vf].maxrate = tx_max;
+ lif->ionic->vfs[vf].maxrate = cpu_to_le32(tx_max);
}
up_write(&ionic->vf_op_lock);
static void ionic_lif_queue_identify(struct ionic_lif *lif)
{
+ union ionic_q_identity __iomem *q_ident;
struct ionic *ionic = lif->ionic;
- union ionic_q_identity *q_ident;
struct ionic_dev *idev;
int qtype;
int err;
idev = &lif->ionic->idev;
- q_ident = (union ionic_q_identity *)&idev->dev_cmd_regs->data;
+ q_ident = (union ionic_q_identity __iomem *)&idev->dev_cmd_regs->data;
for (qtype = 0; qtype < ARRAY_SIZE(ionic_qtype_versions); qtype++) {
struct ionic_qtype_info *qti = &lif->qtype_info[qtype];
ionic_qtype_versions[qtype]);
err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
if (!err) {
- qti->version = q_ident->version;
- qti->supported = q_ident->supported;
- qti->features = le64_to_cpu(q_ident->features);
- qti->desc_sz = le16_to_cpu(q_ident->desc_sz);
- qti->comp_sz = le16_to_cpu(q_ident->comp_sz);
- qti->sg_desc_sz = le16_to_cpu(q_ident->sg_desc_sz);
- qti->max_sg_elems = le16_to_cpu(q_ident->max_sg_elems);
- qti->sg_desc_stride = le16_to_cpu(q_ident->sg_desc_stride);
+ qti->version = readb(&q_ident->version);
+ qti->supported = readb(&q_ident->supported);
+ qti->features = readq(&q_ident->features);
+ qti->desc_sz = readw(&q_ident->desc_sz);
+ qti->comp_sz = readw(&q_ident->comp_sz);
+ qti->sg_desc_sz = readw(&q_ident->sg_desc_sz);
+ qti->max_sg_elems = readw(&q_ident->max_sg_elems);
+ qti->sg_desc_stride = readw(&q_ident->sg_desc_stride);
}
mutex_unlock(&ionic->dev_cmd_lock);
static void ionic_dev_cmd_clean(struct ionic *ionic)
{
- union ionic_dev_cmd_regs *regs = ionic->idev.dev_cmd_regs;
+ union __iomem ionic_dev_cmd_regs *regs = ionic->idev.dev_cmd_regs;
iowrite32(0, ®s->doorbell);
memset_io(®s->cmd, 0, sizeof(regs->cmd));
*/
max_wait = jiffies + (max_seconds * HZ);
try_again:
- opcode = idev->dev_cmd_regs->cmd.cmd.opcode;
+ opcode = readb(&idev->dev_cmd_regs->cmd.cmd.opcode);
start_time = jiffies;
do {
done = ionic_dev_cmd_done(idev);
(*((u64 *)(((u8 *)(base_ptr)) + (desc_ptr)->offset)))
#define IONIC_READ_STAT_LE64(base_ptr, desc_ptr) \
- __le64_to_cpu(*((u64 *)(((u8 *)(base_ptr)) + (desc_ptr)->offset)))
+ __le64_to_cpu(*((__le64 *)(((u8 *)(base_ptr)) + (desc_ptr)->offset)))
struct ionic_stat_desc {
char name[ETH_GSTRING_LEN];
if (likely(netdev->features & NETIF_F_RXCSUM)) {
if (comp->csum_flags & IONIC_RXQ_COMP_CSUM_F_CALC) {
skb->ip_summed = CHECKSUM_COMPLETE;
- skb->csum = (__wsum)le16_to_cpu(comp->csum);
+ skb->csum = (__force __wsum)le16_to_cpu(comp->csum);
stats->csum_complete++;
}
} else {
return true;
}
-void ionic_rx_flush(struct ionic_cq *cq)
-{
- struct ionic_dev *idev = &cq->lif->ionic->idev;
- u32 work_done;
-
- work_done = ionic_cq_service(cq, cq->num_descs,
- ionic_rx_service, NULL, NULL);
-
- if (work_done)
- ionic_intr_credits(idev->intr_ctrl, cq->bound_intr->index,
- work_done, IONIC_INTR_CRED_RESET_COALESCE);
-}
-
static int ionic_rx_page_alloc(struct ionic_queue *q,
struct ionic_page_info *page_info)
{
void ionic_rx_empty(struct ionic_queue *q)
{
struct ionic_desc_info *desc_info;
- struct ionic_rxq_desc *desc;
- unsigned int i;
- u16 idx;
-
- idx = q->tail_idx;
- while (idx != q->head_idx) {
- desc_info = &q->info[idx];
- desc = desc_info->desc;
- desc->addr = 0;
- desc->len = 0;
+ struct ionic_page_info *page_info;
+ unsigned int i, j;
- for (i = 0; i < desc_info->npages; i++)
- ionic_rx_page_free(q, &desc_info->pages[i]);
+ for (i = 0; i < q->num_descs; i++) {
+ desc_info = &q->info[i];
+ for (j = 0; j < IONIC_RX_MAX_SG_ELEMS + 1; j++) {
+ page_info = &desc_info->pages[j];
+ if (page_info->page)
+ ionic_rx_page_free(q, page_info);
+ }
+ desc_info->npages = 0;
+ desc_info->cb = NULL;
desc_info->cb_arg = NULL;
- idx = (idx + 1) & (q->num_descs - 1);
}
}
skb_frag_t *frag;
bool start, done;
bool outer_csum;
+ dma_addr_t addr;
bool has_vlan;
u16 desc_len;
u8 desc_nsge;
if (frag_left > 0) {
len = min(frag_left, left);
frag_left -= len;
- elem->addr =
- cpu_to_le64(ionic_tx_map_frag(q, frag,
- offset, len));
- if (dma_mapping_error(dev, elem->addr))
+ addr = ionic_tx_map_frag(q, frag, offset, len);
+ if (dma_mapping_error(dev, addr))
goto err_out_abort;
+ elem->addr = cpu_to_le64(addr);
elem->len = cpu_to_le16(len);
elem++;
desc_nsge++;
#ifndef _IONIC_TXRX_H_
#define _IONIC_TXRX_H_
-void ionic_rx_flush(struct ionic_cq *cq);
void ionic_tx_flush(struct ionic_cq *cq);
void ionic_rx_fill(struct ionic_queue *q);
}
rtl_irq_disable(tp);
- napi_schedule_irqoff(&tp->napi);
+ napi_schedule(&tp->napi);
out:
rtl_ack_events(tp, status);
rtl_request_firmware(tp);
retval = request_irq(pci_irq_vector(pdev, 0), rtl8169_interrupt,
- IRQF_NO_THREAD | IRQF_SHARED, dev->name, tp);
+ IRQF_SHARED, dev->name, tp);
if (retval < 0)
goto err_release_fw_2;
config.flags = 0;
config.tx_type = priv->tstamp_tx_ctrl ? HWTSTAMP_TX_ON :
HWTSTAMP_TX_OFF;
- if (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE_V2_L2_EVENT)
+ switch (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE) {
+ case RAVB_RXTSTAMP_TYPE_V2_L2_EVENT:
config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
- else if (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE_ALL)
+ break;
+ case RAVB_RXTSTAMP_TYPE_ALL:
config.rx_filter = HWTSTAMP_FILTER_ALL;
- else
+ break;
+ default:
config.rx_filter = HWTSTAMP_FILTER_NONE;
+ }
return copy_to_user(req->ifr_data, &config, sizeof(config)) ?
-EFAULT : 0;
gtp = netdev_priv(dev);
- err = gtp_encap_enable(gtp, data);
- if (err < 0)
- return err;
-
if (!data[IFLA_GTP_PDP_HASHSIZE]) {
hashsize = 1024;
} else {
err = gtp_hashtable_new(gtp, hashsize);
if (err < 0)
- goto out_encap;
+ return err;
+
+ err = gtp_encap_enable(gtp, data);
+ if (err < 0)
+ goto out_hashtable;
err = register_netdevice(dev);
if (err < 0) {
netdev_dbg(dev, "failed to register new netdev %d\n", err);
- goto out_hashtable;
+ goto out_encap;
}
gn = net_generic(dev_net(dev), gtp_net_id);
return 0;
+out_encap:
+ gtp_encap_disable(gtp);
out_hashtable:
kfree(gtp->addr_hash);
kfree(gtp->tid_hash);
-out_encap:
- gtp_encap_disable(gtp);
return err;
}
/* assert(which < trans->tre_count); */
- /* Set the page information for the buffer. We also need to fill in
- * the DMA address and length for the buffer (something dma_map_sg()
- * normally does).
+ /* Commands are quite different from data transfer requests.
+ * Their payloads come from a pool whose memory is allocated
+ * using dma_alloc_coherent(). We therefore do *not* map them
+ * for DMA (unlike what we do for pages and skbs).
+ *
+ * When a transaction completes, the SGL is normally unmapped.
+ * A command transaction has direction DMA_NONE, which tells
+ * gsi_trans_complete() to skip the unmapping step.
+ *
+ * The only things we use directly in a command scatter/gather
+ * entry are the DMA address and length. We still need the SG
+ * table flags to be maintained though, so assign a NULL page
+ * pointer for that purpose.
*/
sg = &trans->sgl[which];
-
- sg_set_buf(sg, buf, size);
+ sg_assign_page(sg, NULL);
sg_dma_address(sg) = addr;
- sg_dma_len(sg) = sg->length;
+ sg_dma_len(sg) = size;
info = &trans->info[which];
info->opcode = opcode;
if (blk_queue_is_zoned(ns->queue)) {
ret = nvme_revalidate_zones(ns);
- if (ret)
+ if (ret && !nvme_first_scan(ns->disk))
return ret;
}
/* fc_ctrl flags values - specified as bit positions */
#define ASSOC_ACTIVE 0
-#define FCCTRL_TERMIO 1
+#define ASSOC_FAILED 1
+#define FCCTRL_TERMIO 2
struct nvme_fc_ctrl {
spinlock_t lock;
u32 cnum;
bool ioq_live;
- atomic_t err_work_active;
u64 association_id;
struct nvmefc_ls_rcv_op *rcv_disconn;
struct blk_mq_tag_set tag_set;
struct delayed_work connect_work;
- struct work_struct err_work;
struct kref ref;
unsigned long flags;
nvme_fc_ctrl_put(ctrl);
}
+/*
+ * This routine is used by the transport when it needs to find active
+ * io on a queue that is to be terminated. The transport uses
+ * blk_mq_tagset_busy_itr() to find the busy requests, which then invoke
+ * this routine to kill them on a 1 by 1 basis.
+ *
+ * As FC allocates FC exchange for each io, the transport must contact
+ * the LLDD to terminate the exchange, thus releasing the FC exchange.
+ * After terminating the exchange the LLDD will call the transport's
+ * normal io done path for the request, but it will have an aborted
+ * status. The done path will return the io request back to the block
+ * layer with an error status.
+ */
+static bool
+nvme_fc_terminate_exchange(struct request *req, void *data, bool reserved)
+{
+ struct nvme_ctrl *nctrl = data;
+ struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl);
+ struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(req);
+
+ __nvme_fc_abort_op(ctrl, op);
+ return true;
+}
+
+/*
+ * This routine runs through all outstanding commands on the association
+ * and aborts them. This routine is typically be called by the
+ * delete_association routine. It is also called due to an error during
+ * reconnect. In that scenario, it is most likely a command that initializes
+ * the controller, including fabric Connect commands on io queues, that
+ * may have timed out or failed thus the io must be killed for the connect
+ * thread to see the error.
+ */
static void
-nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg)
+__nvme_fc_abort_outstanding_ios(struct nvme_fc_ctrl *ctrl, bool start_queues)
{
- int active;
+ /*
+ * If io queues are present, stop them and terminate all outstanding
+ * ios on them. As FC allocates FC exchange for each io, the
+ * transport must contact the LLDD to terminate the exchange,
+ * thus releasing the FC exchange. We use blk_mq_tagset_busy_itr()
+ * to tell us what io's are busy and invoke a transport routine
+ * to kill them with the LLDD. After terminating the exchange
+ * the LLDD will call the transport's normal io done path, but it
+ * will have an aborted status. The done path will return the
+ * io requests back to the block layer as part of normal completions
+ * (but with error status).
+ */
+ if (ctrl->ctrl.queue_count > 1) {
+ nvme_stop_queues(&ctrl->ctrl);
+ blk_mq_tagset_busy_iter(&ctrl->tag_set,
+ nvme_fc_terminate_exchange, &ctrl->ctrl);
+ blk_mq_tagset_wait_completed_request(&ctrl->tag_set);
+ if (start_queues)
+ nvme_start_queues(&ctrl->ctrl);
+ }
+
+ /*
+ * Other transports, which don't have link-level contexts bound
+ * to sqe's, would try to gracefully shutdown the controller by
+ * writing the registers for shutdown and polling (call
+ * nvme_shutdown_ctrl()). Given a bunch of i/o was potentially
+ * just aborted and we will wait on those contexts, and given
+ * there was no indication of how live the controlelr is on the
+ * link, don't send more io to create more contexts for the
+ * shutdown. Let the controller fail via keepalive failure if
+ * its still present.
+ */
/*
- * if an error (io timeout, etc) while (re)connecting,
- * it's an error on creating the new association.
- * Start the error recovery thread if it hasn't already
- * been started. It is expected there could be multiple
- * ios hitting this path before things are cleaned up.
+ * clean up the admin queue. Same thing as above.
+ */
+ blk_mq_quiesce_queue(ctrl->ctrl.admin_q);
+ blk_mq_tagset_busy_iter(&ctrl->admin_tag_set,
+ nvme_fc_terminate_exchange, &ctrl->ctrl);
+ blk_mq_tagset_wait_completed_request(&ctrl->admin_tag_set);
+}
+
+static void
+nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg)
+{
+ /*
+ * if an error (io timeout, etc) while (re)connecting, the remote
+ * port requested terminating of the association (disconnect_ls)
+ * or an error (timeout or abort) occurred on an io while creating
+ * the controller. Abort any ios on the association and let the
+ * create_association error path resolve things.
*/
if (ctrl->ctrl.state == NVME_CTRL_CONNECTING) {
- active = atomic_xchg(&ctrl->err_work_active, 1);
- if (!active && !queue_work(nvme_fc_wq, &ctrl->err_work)) {
- atomic_set(&ctrl->err_work_active, 0);
- WARN_ON(1);
- }
+ __nvme_fc_abort_outstanding_ios(ctrl, true);
+ set_bit(ASSOC_FAILED, &ctrl->flags);
return;
}
nvme_fc_ctrl_put(ctrl);
}
-/*
- * This routine is used by the transport when it needs to find active
- * io on a queue that is to be terminated. The transport uses
- * blk_mq_tagset_busy_itr() to find the busy requests, which then invoke
- * this routine to kill them on a 1 by 1 basis.
- *
- * As FC allocates FC exchange for each io, the transport must contact
- * the LLDD to terminate the exchange, thus releasing the FC exchange.
- * After terminating the exchange the LLDD will call the transport's
- * normal io done path for the request, but it will have an aborted
- * status. The done path will return the io request back to the block
- * layer with an error status.
- */
-static bool
-nvme_fc_terminate_exchange(struct request *req, void *data, bool reserved)
-{
- struct nvme_ctrl *nctrl = data;
- struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl);
- struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(req);
-
- __nvme_fc_abort_op(ctrl, op);
- return true;
-}
-
static const struct blk_mq_ops nvme_fc_mq_ops = {
.queue_rq = nvme_fc_queue_rq,
ctrl->cnum, ctrl->lport->localport.port_name,
ctrl->rport->remoteport.port_name, ctrl->ctrl.opts->subsysnqn);
+ clear_bit(ASSOC_FAILED, &ctrl->flags);
+
/*
* Create the admin queue
*/
*/
ret = nvme_enable_ctrl(&ctrl->ctrl);
- if (ret)
+ if (ret || test_bit(ASSOC_FAILED, &ctrl->flags))
goto out_disconnect_admin_queue;
ctrl->ctrl.max_segments = ctrl->lport->ops->max_sgl_segments;
blk_mq_unquiesce_queue(ctrl->ctrl.admin_q);
ret = nvme_init_identify(&ctrl->ctrl);
- if (ret)
+ if (ret || test_bit(ASSOC_FAILED, &ctrl->flags))
goto out_disconnect_admin_queue;
/* sanity checks */
ret = nvme_fc_create_io_queues(ctrl);
else
ret = nvme_fc_recreate_io_queues(ctrl);
- if (ret)
- goto out_term_aen_ops;
}
+ if (ret || test_bit(ASSOC_FAILED, &ctrl->flags))
+ goto out_term_aen_ops;
changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE);
}
-/*
- * This routine runs through all outstanding commands on the association
- * and aborts them. This routine is typically be called by the
- * delete_association routine. It is also called due to an error during
- * reconnect. In that scenario, it is most likely a command that initializes
- * the controller, including fabric Connect commands on io queues, that
- * may have timed out or failed thus the io must be killed for the connect
- * thread to see the error.
- */
-static void
-__nvme_fc_abort_outstanding_ios(struct nvme_fc_ctrl *ctrl, bool start_queues)
-{
- /*
- * If io queues are present, stop them and terminate all outstanding
- * ios on them. As FC allocates FC exchange for each io, the
- * transport must contact the LLDD to terminate the exchange,
- * thus releasing the FC exchange. We use blk_mq_tagset_busy_itr()
- * to tell us what io's are busy and invoke a transport routine
- * to kill them with the LLDD. After terminating the exchange
- * the LLDD will call the transport's normal io done path, but it
- * will have an aborted status. The done path will return the
- * io requests back to the block layer as part of normal completions
- * (but with error status).
- */
- if (ctrl->ctrl.queue_count > 1) {
- nvme_stop_queues(&ctrl->ctrl);
- blk_mq_tagset_busy_iter(&ctrl->tag_set,
- nvme_fc_terminate_exchange, &ctrl->ctrl);
- blk_mq_tagset_wait_completed_request(&ctrl->tag_set);
- if (start_queues)
- nvme_start_queues(&ctrl->ctrl);
- }
-
- /*
- * Other transports, which don't have link-level contexts bound
- * to sqe's, would try to gracefully shutdown the controller by
- * writing the registers for shutdown and polling (call
- * nvme_shutdown_ctrl()). Given a bunch of i/o was potentially
- * just aborted and we will wait on those contexts, and given
- * there was no indication of how live the controlelr is on the
- * link, don't send more io to create more contexts for the
- * shutdown. Let the controller fail via keepalive failure if
- * its still present.
- */
-
- /*
- * clean up the admin queue. Same thing as above.
- */
- blk_mq_quiesce_queue(ctrl->ctrl.admin_q);
- blk_mq_tagset_busy_iter(&ctrl->admin_tag_set,
- nvme_fc_terminate_exchange, &ctrl->ctrl);
- blk_mq_tagset_wait_completed_request(&ctrl->admin_tag_set);
-}
-
/*
* This routine stops operation of the controller on the host side.
* On the host os stack side: Admin and IO queues are stopped,
{
struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl);
- cancel_work_sync(&ctrl->err_work);
cancel_delayed_work_sync(&ctrl->connect_work);
/*
* kill the association on the link side. this will block
}
static void
-__nvme_fc_terminate_io(struct nvme_fc_ctrl *ctrl)
+nvme_fc_reset_ctrl_work(struct work_struct *work)
{
- /*
- * if state is CONNECTING - the error occurred as part of a
- * reconnect attempt. Abort any ios on the association and
- * let the create_association error paths resolve things.
- */
- if (ctrl->ctrl.state == NVME_CTRL_CONNECTING) {
- __nvme_fc_abort_outstanding_ios(ctrl, true);
- return;
- }
-
- /*
- * For any other state, kill the association. As this routine
- * is a common io abort routine for resetting and such, after
- * the association is terminated, ensure that the state is set
- * to CONNECTING.
- */
+ struct nvme_fc_ctrl *ctrl =
+ container_of(work, struct nvme_fc_ctrl, ctrl.reset_work);
- nvme_stop_keep_alive(&ctrl->ctrl);
+ nvme_stop_ctrl(&ctrl->ctrl);
/* will block will waiting for io to terminate */
nvme_fc_delete_association(ctrl);
- if (ctrl->ctrl.state != NVME_CTRL_CONNECTING &&
- !nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING))
+ if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING))
dev_err(ctrl->ctrl.device,
"NVME-FC{%d}: error_recovery: Couldn't change state "
"to CONNECTING\n", ctrl->cnum);
-}
-
-static void
-nvme_fc_reset_ctrl_work(struct work_struct *work)
-{
- struct nvme_fc_ctrl *ctrl =
- container_of(work, struct nvme_fc_ctrl, ctrl.reset_work);
- int ret;
- __nvme_fc_terminate_io(ctrl);
-
- nvme_stop_ctrl(&ctrl->ctrl);
-
- if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE)
- ret = nvme_fc_create_association(ctrl);
- else
- ret = -ENOTCONN;
-
- if (ret)
- nvme_fc_reconnect_or_delete(ctrl, ret);
- else
- dev_info(ctrl->ctrl.device,
- "NVME-FC{%d}: controller reset complete\n",
- ctrl->cnum);
+ if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE) {
+ if (!queue_delayed_work(nvme_wq, &ctrl->connect_work, 0)) {
+ dev_err(ctrl->ctrl.device,
+ "NVME-FC{%d}: failed to schedule connect "
+ "after reset\n", ctrl->cnum);
+ } else {
+ flush_delayed_work(&ctrl->connect_work);
+ }
+ } else {
+ nvme_fc_reconnect_or_delete(ctrl, -ENOTCONN);
+ }
}
-static void
-nvme_fc_connect_err_work(struct work_struct *work)
-{
- struct nvme_fc_ctrl *ctrl =
- container_of(work, struct nvme_fc_ctrl, err_work);
-
- __nvme_fc_terminate_io(ctrl);
-
- atomic_set(&ctrl->err_work_active, 0);
-
- /*
- * Rescheduling the connection after recovering
- * from the io error is left to the reconnect work
- * item, which is what should have stalled waiting on
- * the io that had the error that scheduled this work.
- */
-}
static const struct nvme_ctrl_ops nvme_fc_ctrl_ops = {
.name = "fc",
ctrl->dev = lport->dev;
ctrl->cnum = idx;
ctrl->ioq_live = false;
- atomic_set(&ctrl->err_work_active, 0);
init_waitqueue_head(&ctrl->ioabort_wait);
get_device(ctrl->dev);
INIT_WORK(&ctrl->ctrl.reset_work, nvme_fc_reset_ctrl_work);
INIT_DELAYED_WORK(&ctrl->connect_work, nvme_fc_connect_ctrl_work);
- INIT_WORK(&ctrl->err_work, nvme_fc_connect_err_work);
spin_lock_init(&ctrl->lock);
/* io queue count */
fail_ctrl:
nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_DELETING);
cancel_work_sync(&ctrl->ctrl.reset_work);
- cancel_work_sync(&ctrl->err_work);
cancel_delayed_work_sync(&ctrl->connect_work);
ctrl->ctrl.opts = NULL;
return;
}
+ /* sanity checking for received data length */
+ if (unlikely(wc->byte_len < len)) {
+ dev_err(queue->ctrl->ctrl.device,
+ "Unexpected nvme completion length(%d)\n", wc->byte_len);
+ nvme_rdma_error_recovery(queue->ctrl);
+ return;
+ }
+
ib_dma_sync_single_for_cpu(ibdev, qe->dma, len, DMA_FROM_DEVICE);
/*
* AEN requests are special as they don't time out and can
priv.hsqsize = cpu_to_le16(queue->ctrl->ctrl.sqsize);
}
- ret = rdma_connect(queue->cm_id, ¶m);
+ ret = rdma_connect_locked(queue->cm_id, ¶m);
if (ret) {
dev_err(ctrl->ctrl.device,
- "rdma_connect failed (%d).\n", ret);
+ "rdma_connect_locked failed (%d).\n", ret);
goto out_destroy_queue_ib;
}
req->error_loc = NVMET_NO_ERROR_LOC;
req->error_slba = 0;
- trace_nvmet_req_init(req, req->cmd);
-
/* no support for fused commands yet */
if (unlikely(flags & (NVME_CMD_FUSE_FIRST | NVME_CMD_FUSE_SECOND))) {
req->error_loc = offsetof(struct nvme_common_command, flags);
if (status)
goto fail;
+ trace_nvmet_req_init(req, req->cmd);
+
if (unlikely(!percpu_ref_tryget_live(&sq->ref))) {
status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
goto fail;
return req->sq->ctrl;
}
-static inline void __assign_disk_name(char *name, struct nvmet_req *req,
- bool init)
+static inline void __assign_req_name(char *name, struct nvmet_req *req)
{
- struct nvmet_ctrl *ctrl = nvmet_req_to_ctrl(req);
- struct nvmet_ns *ns;
-
- if ((init && req->sq->qid) || (!init && req->cq->qid)) {
- ns = nvmet_find_namespace(ctrl, req->cmd->rw.nsid);
- strncpy(name, ns->device_path, DISK_NAME_LEN);
- return;
- }
-
- memset(name, 0, DISK_NAME_LEN);
+ if (req->ns)
+ strncpy(name, req->ns->device_path, DISK_NAME_LEN);
+ else
+ memset(name, 0, DISK_NAME_LEN);
}
#endif
TP_fast_assign(
__entry->cmd = cmd;
__entry->ctrl = nvmet_req_to_ctrl(req);
- __assign_disk_name(__entry->disk, req, true);
+ __assign_req_name(__entry->disk, req);
__entry->qid = req->sq->qid;
__entry->cid = cmd->common.command_id;
__entry->opcode = cmd->common.opcode;
__entry->cid = req->cqe->command_id;
__entry->result = le64_to_cpu(req->cqe->result.u64);
__entry->status = le16_to_cpu(req->cqe->status) >> 1;
- __assign_disk_name(__entry->disk, req, false);
+ __assign_req_name(__entry->disk, req);
),
TP_printk("nvmet%s: %sqid=%d, cmdid=%u, res=%#llx, status=%#x",
__print_ctrl_name(__entry->ctrl),
{
const struct iommu_ops *iommu;
const struct bus_dma_region *map = NULL;
- dma_addr_t dma_start = 0;
+ u64 dma_start = 0;
u64 mask, end, size = 0;
bool coherent;
int ret;
return ret == -ENODEV ? 0 : ret;
} else {
const struct bus_dma_region *r = map;
- dma_addr_t dma_end = 0;
+ u64 dma_end = 0;
/* Determine the overall bounds of all DMA regions */
- for (dma_start = ~(dma_addr_t)0; r->size; r++) {
+ for (dma_start = ~0; r->size; r++) {
/* Take lower and upper limits */
if (r->dma_start < dma_start)
dma_start = r->dma_start;
if (ra->base > rb->base)
return 1;
+ /*
+ * Put the dynamic allocations (address == 0, size == 0) before static
+ * allocations at address 0x0 so that overlap detection works
+ * correctly.
+ */
+ if (ra->size < rb->size)
+ return -1;
+ if (ra->size > rb->size)
+ return 1;
+
return 0;
}
this = &reserved_mem[i];
next = &reserved_mem[i + 1];
- if (!(this->base && next->base))
- continue;
+
if (this->base + this->size > next->base) {
phys_addr_t this_end, next_end;
}
/**
- * pnp_protocol_register - adds a pnp protocol to the pnp layer
+ * pnp_register_protocol - adds a pnp protocol to the pnp layer
* @protocol: pointer to the corresponding pnp_protocol structure
*
* Ex protocols: ISAPNP, PNPBIOS, etc
}
/**
- * pnp_protocol_unregister - removes a pnp protocol from the pnp layer
+ * pnp_unregister_protocol - removes a pnp protocol from the pnp layer
* @protocol: pointer to the corresponding pnp_protocol structure
*/
void pnp_unregister_protocol(struct pnp_protocol *protocol)
}
static struct ism_systemeid SYSTEM_EID = {
- .seid_string = "IBM-SYSZ-IBMSEID00000000",
+ .seid_string = "IBM-SYSZ-ISMSEID00000000",
.serial_number = "0000",
.type = "0000",
};
}
}
- if (scmd) {
+ if (scmd && hisi_hba->shost->nr_hw_queues) {
unsigned int dq_index;
u32 blk_tag;
spin_unlock_irqrestore(hostdata->host->host_lock, flags);
}
+/**
+ * ibmvscsi_set_request_limit - Set the adapter request_limit in response to
+ * an adapter failure, reset, or SRP Login. Done under host lock to prevent
+ * race with SCSI command submission.
+ * @hostdata: adapter to adjust
+ * @limit: new request limit
+ */
+static void ibmvscsi_set_request_limit(struct ibmvscsi_host_data *hostdata, int limit)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(hostdata->host->host_lock, flags);
+ atomic_set(&hostdata->request_limit, limit);
+ spin_unlock_irqrestore(hostdata->host->host_lock, flags);
+}
+
/**
* ibmvscsi_reset_host - Reset the connection to the server
* @hostdata: struct ibmvscsi_host_data to reset
static void ibmvscsi_reset_host(struct ibmvscsi_host_data *hostdata)
{
scsi_block_requests(hostdata->host);
- atomic_set(&hostdata->request_limit, 0);
+ ibmvscsi_set_request_limit(hostdata, 0);
purge_requests(hostdata, DID_ERROR);
hostdata->action = IBMVSCSI_HOST_ACTION_RESET;
dev_info(hostdata->dev, "SRP_LOGIN_REJ reason %u\n",
evt_struct->xfer_iu->srp.login_rej.reason);
/* Login failed. */
- atomic_set(&hostdata->request_limit, -1);
+ ibmvscsi_set_request_limit(hostdata, -1);
return;
default:
dev_err(hostdata->dev, "Invalid login response typecode 0x%02x!\n",
evt_struct->xfer_iu->srp.login_rsp.opcode);
/* Login failed. */
- atomic_set(&hostdata->request_limit, -1);
+ ibmvscsi_set_request_limit(hostdata, -1);
return;
}
* This value is set rather than added to request_limit because
* request_limit could have been set to -1 by this client.
*/
- atomic_set(&hostdata->request_limit,
+ ibmvscsi_set_request_limit(hostdata,
be32_to_cpu(evt_struct->xfer_iu->srp.login_rsp.req_lim_delta));
/* If we had any pending I/Os, kick them */
login->req_buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT |
SRP_BUF_FORMAT_INDIRECT);
- spin_lock_irqsave(hostdata->host->host_lock, flags);
/* Start out with a request limit of 0, since this is negotiated in
* the login request we are just sending and login requests always
* get sent by the driver regardless of request_limit.
*/
- atomic_set(&hostdata->request_limit, 0);
+ ibmvscsi_set_request_limit(hostdata, 0);
+ spin_lock_irqsave(hostdata->host->host_lock, flags);
rc = ibmvscsi_send_srp_event(evt_struct, hostdata, login_timeout * 2);
spin_unlock_irqrestore(hostdata->host->host_lock, flags);
dev_info(hostdata->dev, "sent SRP login\n");
return;
case VIOSRP_CRQ_XPORT_EVENT: /* Hypervisor telling us the connection is closed */
scsi_block_requests(hostdata->host);
- atomic_set(&hostdata->request_limit, 0);
+ ibmvscsi_set_request_limit(hostdata, 0);
if (crq->format == 0x06) {
/* We need to re-setup the interpartition connection */
dev_info(hostdata->dev, "Re-enabling adapter!\n");
}
hostdata->action = IBMVSCSI_HOST_ACTION_NONE;
+ spin_unlock_irqrestore(hostdata->host->host_lock, flags);
if (rc) {
- atomic_set(&hostdata->request_limit, -1);
+ ibmvscsi_set_request_limit(hostdata, -1);
dev_err(hostdata->dev, "error after %s\n", action);
}
- spin_unlock_irqrestore(hostdata->host->host_lock, flags);
scsi_unblock_requests(hostdata->host);
}
init_waitqueue_head(&hostdata->work_wait_q);
hostdata->host = host;
hostdata->dev = dev;
- atomic_set(&hostdata->request_limit, -1);
+ ibmvscsi_set_request_limit(hostdata, -1);
hostdata->host->max_sectors = IBMVSCSI_MAX_SECTORS_DEFAULT;
if (map_persist_bufs(hostdata)) {
fcport = qla_rport->fcport;
- if (!qpair || !fcport || (qpair && !qpair->fw_started) ||
- (fcport && fcport->deleted))
+ if (!qpair || !fcport)
return -ENODEV;
+ if (!qpair->fw_started || fcport->deleted)
+ return -EBUSY;
+
vha = fcport->vha;
if (!(fcport->nvme_flag & NVME_FLAG_REGISTERED))
{
ulong flags = 0;
-#ifndef __CHECKER__
if (!hardware_locked)
spin_lock_irqsave(&vha->hw->hardware_lock, flags);
-#endif
if (!vha->hw->mpi_fw_dump) {
ql_log(ql_log_warn, vha, 0x02f3, "-> mpi_fwdump no buffer\n");
} else {
}
bailout:
-#ifndef __CHECKER__
if (!hardware_locked)
spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
-#endif
}
void
*/
static struct async_scan_data *scsi_prep_async_scan(struct Scsi_Host *shost)
{
- struct async_scan_data *data;
+ struct async_scan_data *data = NULL;
unsigned long flags;
if (strncmp(scsi_scan_type, "sync", 4) == 0)
return NULL;
+ mutex_lock(&shost->scan_mutex);
if (shost->async_scan) {
shost_printk(KERN_DEBUG, shost, "%s called twice\n", __func__);
- return NULL;
+ goto err;
}
data = kmalloc(sizeof(*data), GFP_KERNEL);
goto err;
init_completion(&data->prev_finished);
- mutex_lock(&shost->scan_mutex);
spin_lock_irqsave(shost->host_lock, flags);
shost->async_scan = 1;
spin_unlock_irqrestore(shost->host_lock, flags);
return data;
err:
+ mutex_unlock(&shost->scan_mutex);
kfree(data);
return NULL;
}
struct genpd_onecell_data *genpd_data = data;
unsigned int idx = genpdspec->args[0];
- if (genpdspec->args_count < 2)
+ if (genpdspec->args_count != 1 && genpdspec->args_count != 2)
return ERR_PTR(-EINVAL);
if (idx >= genpd_data->num_domains) {
if (dev->irq && board->has_ao_fifo) {
dev->write_subdev = s;
s->subdev_flags |= SDF_CMD_WRITE;
+ s->len_chanlist = s->n_chan;
s->do_cmdtest = cb_pcidas_ao_cmdtest;
s->do_cmd = cb_pcidas_ao_cmd;
s->cancel = cb_pcidas_ao_cancel;
regulator = devm_regulator_register(dev, &can_power_desc, &config);
if (IS_ERR(regulator)) {
err = PTR_ERR(regulator);
- goto out_reset;
+ goto out_ida;
}
/* make controller info visible to userspace */
cd->class_dev = kzalloc(sizeof(*cd->class_dev), GFP_KERNEL);
phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0);
if (!phy_node && of_phy_is_fixed_link(priv->of_node)) {
- int rc;
-
- rc = of_phy_register_fixed_link(priv->of_node);
- if (rc)
- return rc;
-
phy_node = of_node_get(priv->of_node);
}
if (!phy_node)
else
port = work->word1.cn38xx.ipprt;
- if ((work->word2.snoip.err_code == 10) && (work->word1.len <= 64)) {
+ if ((work->word2.snoip.err_code == 10) && (work->word1.len <= 64))
/*
* Ignore length errors on min size packets. Some
* equipment incorrectly pads packets to 64+4FCS
* instead of 60+4FCS. Note these packets still get
* counted as frame errors.
*/
- } else if (work->word2.snoip.err_code == 5 ||
- work->word2.snoip.err_code == 7) {
+ return 0;
+
+ if (work->word2.snoip.err_code == 5 ||
+ work->word2.snoip.err_code == 7) {
/*
* We received a packet with either an alignment error
* or a FCS error. This may be signalling that we are
/* Port received 0xd5 preamble */
work->packet_ptr.s.addr += i + 1;
work->word1.len -= i + 5;
- } else if ((*ptr & 0xf) == 0xd) {
+ return 0;
+ }
+
+ if ((*ptr & 0xf) == 0xd) {
/* Port received 0xd preamble */
work->packet_ptr.s.addr += i;
work->word1.len -= i + 4;
((*(ptr + 1) & 0xf) << 4);
ptr++;
}
- } else {
- printk_ratelimited("Port %d unknown preamble, packet dropped\n",
- port);
- cvm_oct_free_work(work);
- return 1;
+ return 0;
}
+
+ printk_ratelimited("Port %d unknown preamble, packet dropped\n",
+ port);
+ cvm_oct_free_work(work);
+ return 1;
}
- } else {
- printk_ratelimited("Port %d receive error code %d, packet dropped\n",
- port, work->word2.snoip.err_code);
- cvm_oct_free_work(work);
- return 1;
}
- return 0;
+ printk_ratelimited("Port %d receive error code %d, packet dropped\n",
+ port, work->word2.snoip.err_code);
+ cvm_oct_free_work(work);
+ return 1;
}
static void copy_segments_to_skb(struct cvmx_wqe *work, struct sk_buff *skb)
#include <linux/phy.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
+#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
break;
}
+ if (priv->of_node && of_phy_is_fixed_link(priv->of_node)) {
+ if (of_phy_register_fixed_link(priv->of_node)) {
+ netdev_err(dev, "Failed to register fixed link for interface %d, port %d\n",
+ interface, priv->port);
+ dev->netdev_ops = NULL;
+ }
+ }
+
if (!dev->netdev_ops) {
free_netdev(dev);
} else if (register_netdev(dev) < 0) {
/* ordered workqueue to process all bulk operations */
struct workqueue_struct *bulk_wq;
+
+ /* handle for a vchiq instance */
+ struct vchiq_instance *vchiq_instance;
};
static struct mmal_msg_context *
mutex_unlock(&instance->vchiq_mutex);
+ vchiq_shutdown(instance->vchiq_instance);
flush_workqueue(instance->bulk_wq);
destroy_workqueue(instance->bulk_wq);
int vchiq_mmal_init(struct vchiq_mmal_instance **out_instance)
{
int status;
+ int err = -ENODEV;
struct vchiq_mmal_instance *instance;
static struct vchiq_instance *vchiq_instance;
struct vchiq_service_params_kernel params = {
status = vchiq_connect(vchiq_instance);
if (status) {
pr_err("Failed to connect VCHI instance (status=%d)\n", status);
- return -EIO;
+ err = -EIO;
+ goto err_shutdown_vchiq;
}
instance = kzalloc(sizeof(*instance), GFP_KERNEL);
- if (!instance)
- return -ENOMEM;
+ if (!instance) {
+ err = -ENOMEM;
+ goto err_shutdown_vchiq;
+ }
mutex_init(&instance->vchiq_mutex);
instance->bulk_scratch = vmalloc(PAGE_SIZE);
+ instance->vchiq_instance = vchiq_instance;
mutex_init(&instance->context_map_lock);
idr_init_base(&instance->context_map, 1);
err_free:
vfree(instance->bulk_scratch);
kfree(instance);
- return -ENODEV;
+err_shutdown_vchiq:
+ vchiq_shutdown(vchiq_instance);
+ return err;
}
EXPORT_SYMBOL_GPL(vchiq_mmal_init);
if (!wdev->pdata.gpio_wakeup)
return;
- if (gpiod_get_value_cansleep(wdev->pdata.gpio_wakeup) >= 0)
+ if (gpiod_get_value_cansleep(wdev->pdata.gpio_wakeup) > 0)
return;
if (wfx_api_older_than(wdev, 1, 4)) {
}
return rate->idx + 14;
}
+ // WFx only support 2GHz, else band information should be retrieved
+ // from ieee80211_tx_info
+ band = wdev->hw->wiphy->bands[NL80211_BAND_2GHZ];
if (rate->idx >= band->n_bitrates) {
WARN(1, "wrong rate->idx value: %d", rate->idx);
return -1;
}
- // WFx only support 2GHz, else band information should be retrieved
- // from ieee80211_tx_info
- band = wdev->hw->wiphy->bands[NL80211_BAND_2GHZ];
return band->bitrates[rate->idx].hw_value;
}
uint8_t tmr_type;
uint32_t tmr_cmd_cnt;
- int16_t tmr_cmd_ids[0];
+ int16_t tmr_cmd_ids[];
};
/*
int name_len;
int rc;
- if (connection_method == TEE_IOCTL_LOGIN_PUBLIC) {
+ if (connection_method == TEE_IOCTL_LOGIN_PUBLIC ||
+ connection_method == TEE_IOCTL_LOGIN_REE_KERNEL) {
/* Nil UUID to be passed to TEE environment */
uuid_copy(uuid, &uuid_null);
return 0;
static bool is_enabled(struct uart_port *port, int bit)
{
- unsigned long private_data = (unsigned long)port->private_data;
+ unsigned long *private_data = (unsigned long *)&port->private_data;
- if (test_bit(bit, &private_data))
+ if (test_bit(bit, private_data))
return true;
return false;
}
static void enable(struct uart_port *port, int bit)
{
- unsigned long private_data = (unsigned long)port->private_data;
+ unsigned long *private_data = (unsigned long *)&port->private_data;
- set_bit(bit, &private_data);
+ set_bit(bit, private_data);
}
static void disable(struct uart_port *port, int bit)
{
- unsigned long private_data = (unsigned long)port->private_data;
+ unsigned long *private_data = (unsigned long *)&port->private_data;
- clear_bit(bit, &private_data);
+ clear_bit(bit, private_data);
}
#define is_tx_enabled(port) is_enabled(port, tx_enabled_bit)
/* Forward declare this for the dma callbacks*/
static void lpuart_dma_tx_complete(void *arg);
-static inline bool is_ls1028a_lpuart(struct lpuart_port *sport)
+static inline bool is_layerscape_lpuart(struct lpuart_port *sport)
{
- return sport->devtype == LS1028A_LPUART;
+ return (sport->devtype == LS1021A_LPUART ||
+ sport->devtype == LS1028A_LPUART);
}
static inline bool is_imx8qxp_lpuart(struct lpuart_port *sport)
UARTFIFO_FIFOSIZE_MASK);
/*
- * The LS1028A has a fixed length of 16 words. Although it supports the
- * RX/TXSIZE fields their encoding is different. Eg the reference manual
- * states 0b101 is 16 words.
+ * The LS1021A and LS1028A have a fixed FIFO depth of 16 words.
+ * Although they support the RX/TXSIZE fields, their encoding is
+ * different. Eg the reference manual states 0b101 is 16 words.
*/
- if (is_ls1028a_lpuart(sport)) {
+ if (is_layerscape_lpuart(sport)) {
sport->rxfifo_size = 16;
sport->txfifo_size = 16;
sport->port.fifosize = sport->txfifo_size;
return;
if ((unsigned)value < ARRAY_SIZE(func_table)) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&func_buf_lock, flags);
if (func_table[value])
puts_queue(vc, func_table[value]);
+ spin_unlock_irqrestore(&func_buf_lock, flags);
+
} else
pr_err("k_fn called with value=%d\n", value);
}
#undef s
#undef v
-/* FIXME: This one needs untangling and locking */
+/* FIXME: This one needs untangling */
int vt_do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm)
{
struct kbsentry *kbs;
- char *p;
u_char *q;
- u_char __user *up;
int sz, fnw_sz;
int delta;
char *first_free, *fj, *fnw;
i = array_index_nospec(kbs->kb_func, MAX_NR_FUNC);
switch (cmd) {
- case KDGKBSENT:
- sz = sizeof(kbs->kb_string) - 1; /* sz should have been
- a struct member */
- up = user_kdgkb->kb_string;
- p = func_table[i];
- if(p)
- for ( ; *p && sz; p++, sz--)
- if (put_user(*p, up++)) {
- ret = -EFAULT;
- goto reterr;
- }
- if (put_user('\0', up)) {
- ret = -EFAULT;
- goto reterr;
- }
- kfree(kbs);
- return ((p && *p) ? -EOVERFLOW : 0);
+ case KDGKBSENT: {
+ /* size should have been a struct member */
+ ssize_t len = sizeof(user_kdgkb->kb_string);
+
+ spin_lock_irqsave(&func_buf_lock, flags);
+ len = strlcpy(kbs->kb_string, func_table[i] ? : "", len);
+ spin_unlock_irqrestore(&func_buf_lock, flags);
+
+ ret = copy_to_user(user_kdgkb->kb_string, kbs->kb_string,
+ len + 1) ? -EFAULT : 0;
+
+ goto reterr;
+ }
case KDSKBSENT:
if (!perm) {
ret = -EPERM;
return 0;
}
-static inline int do_fontx_ioctl(int cmd,
+static inline int do_fontx_ioctl(struct vc_data *vc, int cmd,
struct consolefontdesc __user *user_cfd,
struct console_font_op *op)
{
op->height = cfdarg.charheight;
op->charcount = cfdarg.charcount;
op->data = cfdarg.chardata;
- return con_font_op(vc_cons[fg_console].d, op);
- case GIO_FONTX: {
+ return con_font_op(vc, op);
+
+ case GIO_FONTX:
op->op = KD_FONT_OP_GET;
op->flags = KD_FONT_FLAG_OLD;
op->width = 8;
op->height = cfdarg.charheight;
op->charcount = cfdarg.charcount;
op->data = cfdarg.chardata;
- i = con_font_op(vc_cons[fg_console].d, op);
+ i = con_font_op(vc, op);
if (i)
return i;
cfdarg.charheight = op->height;
if (copy_to_user(user_cfd, &cfdarg, sizeof(struct consolefontdesc)))
return -EFAULT;
return 0;
- }
}
return -EINVAL;
}
-static int vt_io_fontreset(struct console_font_op *op)
+static int vt_io_fontreset(struct vc_data *vc, struct console_font_op *op)
{
int ret;
op->op = KD_FONT_OP_SET_DEFAULT;
op->data = NULL;
- ret = con_font_op(vc_cons[fg_console].d, op);
+ ret = con_font_op(vc, op);
if (ret)
return ret;
console_lock();
- con_set_default_unimap(vc_cons[fg_console].d);
+ con_set_default_unimap(vc);
console_unlock();
return 0;
}
static inline int do_unimap_ioctl(int cmd, struct unimapdesc __user *user_ud,
- struct vc_data *vc)
+ bool perm, struct vc_data *vc)
{
struct unimapdesc tmp;
return -EFAULT;
switch (cmd) {
case PIO_UNIMAP:
+ if (!perm)
+ return -EPERM;
return con_set_unimap(vc, tmp.entry_ct, tmp.entries);
case GIO_UNIMAP:
- if (fg_console != vc->vc_num)
+ if (!perm && fg_console != vc->vc_num)
return -EPERM;
return con_get_unimap(vc, tmp.entry_ct, &(user_ud->entry_ct),
tmp.entries);
op.height = 0;
op.charcount = 256;
op.data = up;
- return con_font_op(vc_cons[fg_console].d, &op);
+ return con_font_op(vc, &op);
case GIO_FONT:
op.op = KD_FONT_OP_GET;
op.height = 32;
op.charcount = 256;
op.data = up;
- return con_font_op(vc_cons[fg_console].d, &op);
+ return con_font_op(vc, &op);
case PIO_CMAP:
if (!perm)
fallthrough;
case GIO_FONTX:
- return do_fontx_ioctl(cmd, up, &op);
+ return do_fontx_ioctl(vc, cmd, up, &op);
case PIO_FONTRESET:
if (!perm)
return -EPERM;
- return vt_io_fontreset(&op);
+ return vt_io_fontreset(vc, &op);
case PIO_SCRNMAP:
if (!perm)
case PIO_UNIMAP:
case GIO_UNIMAP:
- if (!perm)
- return -EPERM;
-
- return do_unimap_ioctl(cmd, up, vc);
+ return do_unimap_ioctl(cmd, up, perm, vc);
default:
return -ENOIOCTLCMD;
};
static inline int
-compat_fontx_ioctl(int cmd, struct compat_consolefontdesc __user *user_cfd,
- int perm, struct console_font_op *op)
+compat_fontx_ioctl(struct vc_data *vc, int cmd,
+ struct compat_consolefontdesc __user *user_cfd,
+ int perm, struct console_font_op *op)
{
struct compat_consolefontdesc cfdarg;
int i;
op->height = cfdarg.charheight;
op->charcount = cfdarg.charcount;
op->data = compat_ptr(cfdarg.chardata);
- return con_font_op(vc_cons[fg_console].d, op);
+ return con_font_op(vc, op);
+
case GIO_FONTX:
op->op = KD_FONT_OP_GET;
op->flags = KD_FONT_FLAG_OLD;
op->height = cfdarg.charheight;
op->charcount = cfdarg.charcount;
op->data = compat_ptr(cfdarg.chardata);
- i = con_font_op(vc_cons[fg_console].d, op);
+ i = con_font_op(vc, op);
if (i)
return i;
cfdarg.charheight = op->height;
*/
case PIO_FONTX:
case GIO_FONTX:
- return compat_fontx_ioctl(cmd, up, perm, &op);
+ return compat_fontx_ioctl(vc, cmd, up, perm, &op);
case KDFONTOP:
return compat_kdfontop_ioctl(up, perm, &op, vc);
struct usb_ctrlrequest *ctrl_req)
{
enum usb_device_state device_state = priv_dev->gadget.state;
- struct cdns3_endpoint *priv_ep;
u32 config = le16_to_cpu(ctrl_req->wValue);
int result = 0;
- int i;
switch (device_state) {
case USB_STATE_ADDRESS:
- /* Configure non-control EPs */
- for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++) {
- priv_ep = priv_dev->eps[i];
- if (!priv_ep)
- continue;
-
- if (priv_ep->flags & EP_CLAIMED)
- cdns3_ep_config(priv_ep);
- }
-
result = cdns3_ep0_delegate_req(priv_dev, ctrl_req);
- if (result)
- return result;
-
- if (!config) {
- cdns3_hw_reset_eps_config(priv_dev);
- usb_gadget_set_state(&priv_dev->gadget,
- USB_STATE_ADDRESS);
- }
+ if (result || !config)
+ goto reset_config;
break;
case USB_STATE_CONFIGURED:
result = cdns3_ep0_delegate_req(priv_dev, ctrl_req);
+ if (!config && !result)
+ goto reset_config;
- if (!config && !result) {
- cdns3_hw_reset_eps_config(priv_dev);
- usb_gadget_set_state(&priv_dev->gadget,
- USB_STATE_ADDRESS);
- }
break;
default:
- result = -EINVAL;
+ return -EINVAL;
}
+ return 0;
+
+reset_config:
+ if (result != USB_GADGET_DELAYED_STATUS)
+ cdns3_hw_reset_eps_config(priv_dev);
+
+ usb_gadget_set_state(&priv_dev->gadget,
+ USB_STATE_ADDRESS);
+
return result;
}
unsigned long flags;
int ret = 0;
u8 zlp = 0;
+ int i;
spin_lock_irqsave(&priv_dev->lock, flags);
trace_cdns3_ep0_queue(priv_dev, request);
u32 val;
cdns3_select_ep(priv_dev, 0x00);
+
+ /*
+ * Configure all non-control EPs which are not enabled by class driver
+ */
+ for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++) {
+ priv_ep = priv_dev->eps[i];
+ if (priv_ep && priv_ep->flags & EP_CLAIMED &&
+ !(priv_ep->flags & EP_ENABLED))
+ cdns3_ep_config(priv_ep, 0);
+ }
+
cdns3_set_hw_configuration(priv_dev);
cdns3_ep0_complete_setup(priv_dev, 0, 1);
/* wait until configuration set */
struct cdns3_usb_regs __iomem *regs;
struct cdns3_endpoint *priv_ep;
u32 max_packet_size = 64;
+ u32 ep_cfg;
regs = priv_dev->regs;
BIT(0) | BIT(16));
}
- writel(EP_CFG_ENABLE | EP_CFG_MAXPKTSIZE(max_packet_size),
- ®s->ep_cfg);
+ ep_cfg = EP_CFG_ENABLE | EP_CFG_MAXPKTSIZE(max_packet_size);
+
+ if (!(priv_ep->flags & EP_CONFIGURED))
+ writel(ep_cfg, ®s->ep_cfg);
writel(EP_STS_EN_SETUPEN | EP_STS_EN_DESCMISEN | EP_STS_EN_TRBERREN,
®s->ep_sts_en);
/* init ep in */
cdns3_select_ep(priv_dev, USB_DIR_IN);
- writel(EP_CFG_ENABLE | EP_CFG_MAXPKTSIZE(max_packet_size),
- ®s->ep_cfg);
+ if (!(priv_ep->flags & EP_CONFIGURED))
+ writel(ep_cfg, ®s->ep_cfg);
+
+ priv_ep->flags |= EP_CONFIGURED;
writel(EP_STS_EN_SETUPEN | EP_STS_EN_TRBERREN, ®s->ep_sts_en);
*/
void cdns3_hw_reset_eps_config(struct cdns3_device *priv_dev)
{
+ int i;
+
writel(USB_CONF_CFGRST, &priv_dev->regs->usb_conf);
cdns3_allow_enable_l1(priv_dev, 0);
priv_dev->out_mem_is_allocated = 0;
priv_dev->wait_for_setup = 0;
priv_dev->using_streams = 0;
+
+ for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++)
+ if (priv_dev->eps[i])
+ priv_dev->eps[i]->flags &= ~EP_CONFIGURED;
}
/**
while (!list_empty(&priv_ep->wa2_descmiss_req_list)) {
int chunk_end;
- int length;
descmiss_priv_req =
cdns3_next_priv_request(&priv_ep->wa2_descmiss_req_list);
break;
chunk_end = descmiss_priv_req->flags & REQUEST_INTERNAL_CH;
- length = request->actual + descmiss_req->actual;
request->status = descmiss_req->status;
__cdns3_descmiss_copy_data(request, descmiss_req);
list_del_init(&descmiss_priv_req->list);
static void cdns3_disconnect_gadget(struct cdns3_device *priv_dev)
{
- if (priv_dev->gadget_driver && priv_dev->gadget_driver->disconnect) {
- spin_unlock(&priv_dev->lock);
+ if (priv_dev->gadget_driver && priv_dev->gadget_driver->disconnect)
priv_dev->gadget_driver->disconnect(&priv_dev->gadget);
- spin_lock(&priv_dev->lock);
- }
}
/**
*/
static void cdns3_check_usb_interrupt_proceed(struct cdns3_device *priv_dev,
u32 usb_ists)
+__must_hold(&priv_dev->lock)
{
int speed = 0;
/* Disconnection detected */
if (usb_ists & (USB_ISTS_DIS2I | USB_ISTS_DISI)) {
+ spin_unlock(&priv_dev->lock);
cdns3_disconnect_gadget(priv_dev);
+ spin_lock(&priv_dev->lock);
priv_dev->gadget.speed = USB_SPEED_UNKNOWN;
usb_gadget_set_state(&priv_dev->gadget, USB_STATE_NOTATTACHED);
cdns3_hw_reset_eps_config(priv_dev);
return 0;
}
-static void cdns3_stream_ep_reconfig(struct cdns3_device *priv_dev,
- struct cdns3_endpoint *priv_ep)
-{
- if (!priv_ep->use_streams || priv_dev->gadget.speed < USB_SPEED_SUPER)
- return;
-
- if (priv_dev->dev_ver >= DEV_VER_V3) {
- u32 mask = BIT(priv_ep->num + (priv_ep->dir ? 16 : 0));
-
- /*
- * Stream capable endpoints are handled by using ep_tdl
- * register. Other endpoints use TDL from TRB feature.
- */
- cdns3_clear_register_bit(&priv_dev->regs->tdl_from_trb, mask);
- }
-
- /* Enable Stream Bit TDL chk and SID chk */
- cdns3_set_register_bit(&priv_dev->regs->ep_cfg, EP_CFG_STREAM_EN |
- EP_CFG_TDL_CHK | EP_CFG_SID_CHK);
-}
-
static void cdns3_configure_dmult(struct cdns3_device *priv_dev,
struct cdns3_endpoint *priv_ep)
{
/**
* cdns3_ep_config Configure hardware endpoint
* @priv_ep: extended endpoint object
+ * @enable: set EP_CFG_ENABLE bit in ep_cfg register.
*/
-void cdns3_ep_config(struct cdns3_endpoint *priv_ep)
+int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable)
{
bool is_iso_ep = (priv_ep->type == USB_ENDPOINT_XFER_ISOC);
struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
break;
default:
/* all other speed are not supported */
- return;
+ return -EINVAL;
}
if (max_packet_size == 1024)
else
priv_ep->trb_burst_size = 16;
- ret = cdns3_ep_onchip_buffer_reserve(priv_dev, buffering + 1,
- !!priv_ep->dir);
- if (ret) {
- dev_err(priv_dev->dev, "onchip mem is full, ep is invalid\n");
- return;
+ /* onchip buffer is only allocated before configuration */
+ if (!priv_dev->hw_configured_flag) {
+ ret = cdns3_ep_onchip_buffer_reserve(priv_dev, buffering + 1,
+ !!priv_ep->dir);
+ if (ret) {
+ dev_err(priv_dev->dev, "onchip mem is full, ep is invalid\n");
+ return ret;
+ }
+ }
+
+ if (enable)
+ ep_cfg |= EP_CFG_ENABLE;
+
+ if (priv_ep->use_streams && priv_dev->gadget.speed >= USB_SPEED_SUPER) {
+ if (priv_dev->dev_ver >= DEV_VER_V3) {
+ u32 mask = BIT(priv_ep->num + (priv_ep->dir ? 16 : 0));
+
+ /*
+ * Stream capable endpoints are handled by using ep_tdl
+ * register. Other endpoints use TDL from TRB feature.
+ */
+ cdns3_clear_register_bit(&priv_dev->regs->tdl_from_trb,
+ mask);
+ }
+
+ /* Enable Stream Bit TDL chk and SID chk */
+ ep_cfg |= EP_CFG_STREAM_EN | EP_CFG_TDL_CHK | EP_CFG_SID_CHK;
}
ep_cfg |= EP_CFG_MAXPKTSIZE(max_packet_size) |
cdns3_select_ep(priv_dev, bEndpointAddress);
writel(ep_cfg, &priv_dev->regs->ep_cfg);
+ priv_ep->flags |= EP_CONFIGURED;
dev_dbg(priv_dev->dev, "Configure %s: with val %08x\n",
priv_ep->name, ep_cfg);
+
+ return 0;
}
/* Find correct direction for HW endpoint according to description */
u32 bEndpointAddress;
unsigned long flags;
int enable = 1;
- int ret;
+ int ret = 0;
int val;
priv_ep = ep_to_cdns3_ep(ep);
bEndpointAddress = priv_ep->num | priv_ep->dir;
cdns3_select_ep(priv_dev, bEndpointAddress);
+ /*
+ * For some versions of controller at some point during ISO OUT traffic
+ * DMA reads Transfer Ring for the EP which has never got doorbell.
+ * This issue was detected only on simulation, but to avoid this issue
+ * driver add protection against it. To fix it driver enable ISO OUT
+ * endpoint before setting DRBL. This special treatment of ISO OUT
+ * endpoints are recommended by controller specification.
+ */
+ if (priv_ep->type == USB_ENDPOINT_XFER_ISOC && !priv_ep->dir)
+ enable = 0;
+
if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) {
/*
* Enable stream support (SS mode) related interrupts
EP_STS_EN_SIDERREN | EP_STS_EN_MD_EXITEN |
EP_STS_EN_STREAMREN;
priv_ep->use_streams = true;
- cdns3_stream_ep_reconfig(priv_dev, priv_ep);
+ ret = cdns3_ep_config(priv_ep, enable);
priv_dev->using_streams |= true;
}
+ } else {
+ ret = cdns3_ep_config(priv_ep, enable);
}
- ret = cdns3_allocate_trb_pool(priv_ep);
+ if (ret)
+ goto exit;
+ ret = cdns3_allocate_trb_pool(priv_ep);
if (ret)
goto exit;
writel(reg, &priv_dev->regs->ep_sts_en);
- /*
- * For some versions of controller at some point during ISO OUT traffic
- * DMA reads Transfer Ring for the EP which has never got doorbell.
- * This issue was detected only on simulation, but to avoid this issue
- * driver add protection against it. To fix it driver enable ISO OUT
- * endpoint before setting DRBL. This special treatment of ISO OUT
- * endpoints are recommended by controller specification.
- */
- if (priv_ep->type == USB_ENDPOINT_XFER_ISOC && !priv_ep->dir)
- enable = 0;
-
- if (enable)
- cdns3_set_register_bit(&priv_dev->regs->ep_cfg, EP_CFG_ENABLE);
-
ep->desc = desc;
priv_ep->flags &= ~(EP_PENDING_REQUEST | EP_STALLED | EP_STALL_PENDING |
EP_QUIRK_ISO_OUT_EN | EP_QUIRK_EXTRA_BUF_EN);
}
static int cdns3_gadget_suspend(struct cdns3 *cdns, bool do_wakeup)
+__must_hold(&cdns->lock)
{
struct cdns3_device *priv_dev = cdns->gadget_dev;
+ spin_unlock(&cdns->lock);
cdns3_disconnect_gadget(priv_dev);
+ spin_lock(&cdns->lock);
priv_dev->gadget.speed = USB_SPEED_UNKNOWN;
usb_gadget_set_state(&priv_dev->gadget, USB_STATE_NOTATTACHED);
#define TRB_TDL_SS_SIZE_GET(p) (((p) & GENMASK(23, 17)) >> 17)
/* transfer_len bitmasks - bits 31:24 */
-#define TRB_BURST_LEN(p) (((p) << 24) & GENMASK(31, 24))
+#define TRB_BURST_LEN(p) ((unsigned int)((p) << 24) & GENMASK(31, 24))
#define TRB_BURST_LEN_GET(p) (((p) & GENMASK(31, 24)) >> 24)
/* Data buffer pointer bitmasks*/
#define EP_QUIRK_EXTRA_BUF_DET BIT(12)
#define EP_QUIRK_EXTRA_BUF_EN BIT(13)
#define EP_TDLCHK_EN BIT(15)
+#define EP_CONFIGURED BIT(16)
u32 flags;
struct cdns3_request *descmis_req;
int cdns3_init_ep0(struct cdns3_device *priv_dev,
struct cdns3_endpoint *priv_ep);
void cdns3_ep0_config(struct cdns3_device *priv_dev);
-void cdns3_ep_config(struct cdns3_endpoint *priv_ep);
+int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable);
void cdns3_check_ep0_interrupt_proceed(struct cdns3_device *priv_dev, int dir);
int __cdns3_gadget_wakeup(struct cdns3_device *priv_dev);
"%s - cooling babbling device\n", __func__);
usb_mark_last_busy(acm->dev);
set_bit(rb->index, &acm->urbs_in_error_delay);
+ set_bit(ACM_ERROR_DELAY, &acm->flags);
cooldown = true;
break;
default:
if (stopped || stalled || cooldown) {
if (stalled)
- schedule_work(&acm->work);
+ schedule_delayed_work(&acm->dwork, 0);
else if (cooldown)
schedule_delayed_work(&acm->dwork, HZ / 2);
return;
acm_write_done(acm, wb);
spin_unlock_irqrestore(&acm->write_lock, flags);
set_bit(EVENT_TTY_WAKEUP, &acm->flags);
- schedule_work(&acm->work);
+ schedule_delayed_work(&acm->dwork, 0);
}
static void acm_softint(struct work_struct *work)
{
int i;
- struct acm *acm = container_of(work, struct acm, work);
+ struct acm *acm = container_of(work, struct acm, dwork.work);
if (test_bit(EVENT_RX_STALL, &acm->flags)) {
smp_mb(); /* against acm_suspend() */
if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) {
for (i = 0; i < acm->rx_buflimit; i++)
if (test_and_clear_bit(i, &acm->urbs_in_error_delay))
- acm_submit_read_urb(acm, i, GFP_NOIO);
+ acm_submit_read_urb(acm, i, GFP_KERNEL);
}
if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags))
acm->ctrlsize = ctrlsize;
acm->readsize = readsize;
acm->rx_buflimit = num_rx_buf;
- INIT_WORK(&acm->work, acm_softint);
INIT_DELAYED_WORK(&acm->dwork, acm_softint);
init_waitqueue_head(&acm->wioctl);
spin_lock_init(&acm->write_lock);
}
acm_kill_urbs(acm);
- cancel_work_sync(&acm->work);
cancel_delayed_work_sync(&acm->dwork);
tty_unregister_device(acm_tty_driver, acm->minor);
return 0;
acm_kill_urbs(acm);
- cancel_work_sync(&acm->work);
cancel_delayed_work_sync(&acm->dwork);
acm->urbs_in_error_delay = 0;
# define ACM_ERROR_DELAY 3
unsigned long urbs_in_error_delay; /* these need to be restarted after a delay */
struct usb_cdc_line_coding line; /* bits, stop, parity */
- struct work_struct work; /* work queue entry for various purposes*/
- struct delayed_work dwork; /* for cool downs needed in error recovery */
+ struct delayed_work dwork; /* work queue entry for various purposes */
unsigned int ctrlin; /* input control lines (DCD, DSR, RI, break, overruns) */
unsigned int ctrlout; /* output control lines (DTR, RTS) */
struct async_icount iocount; /* counters for control line changes */
return NULL;
}
+bool usb_driver_applicable(struct usb_device *udev,
+ struct usb_device_driver *udrv)
+{
+ if (udrv->id_table && udrv->match)
+ return usb_device_match_id(udev, udrv->id_table) != NULL &&
+ udrv->match(udev);
+
+ if (udrv->id_table)
+ return usb_device_match_id(udev, udrv->id_table) != NULL;
+
+ if (udrv->match)
+ return udrv->match(udev);
+
+ return false;
+}
+
static int usb_device_match(struct device *dev, struct device_driver *drv)
{
/* devices and interfaces are handled separately */
udev = to_usb_device(dev);
udrv = to_usb_device_driver(drv);
- if (udrv->id_table)
- return usb_device_match_id(udev, udrv->id_table) != NULL;
-
- if (udrv->match)
- return udrv->match(udev);
-
/* If the device driver under consideration does not have a
* id_table or a match function, then let the driver's probe
* function decide.
*/
- return 1;
+ if (!udrv->id_table && !udrv->match)
+ return 1;
+
+ return usb_driver_applicable(udev, udrv);
} else if (is_usb_interface(dev)) {
struct usb_interface *intf;
return 0;
udev = to_usb_device(dev);
- if (usb_device_match_id(udev, new_udriver->id_table) == NULL &&
- (!new_udriver->match || new_udriver->match(udev) == 0))
+ if (!usb_driver_applicable(udev, new_udriver))
return 0;
ret = device_reprobe(dev);
udrv = to_usb_device_driver(drv);
if (udrv == &usb_generic_driver)
return 0;
- if (usb_device_match_id(udev, udrv->id_table) != NULL)
- return 1;
- return (udrv->match && udrv->match(udev));
+ return usb_driver_applicable(udev, udrv);
}
static bool usb_generic_driver_match(struct usb_device *udev)
const struct usb_device_id *id);
extern const struct usb_device_id *usb_device_match_id(struct usb_device *udev,
const struct usb_device_id *id);
+extern bool usb_driver_applicable(struct usb_device *udev,
+ struct usb_device_driver *udrv);
extern void usb_forced_unbind_intf(struct usb_interface *intf);
extern void usb_unbind_and_rebind_marked_interfaces(struct usb_device *udev);
// SPDX-License-Identifier: GPL-2.0
-/**
+/*
* core.c - DesignWare USB3 DRD Controller Core file
*
* Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
#define DWC3_DEPEVT_EPCMDCMPLT 0x07
/**
- * struct dwc3_event_depvt - Device Endpoint Events
+ * struct dwc3_event_depevt - Device Endpoint Events
* @one_bit: indicates this is an endpoint event (not used)
* @endpoint_number: number of the endpoint
* @endpoint_event: The event we have:
EXPORT_SYMBOL_GPL(usb_string_id);
/**
- * usb_string_ids() - allocate unused string IDs in batch
+ * usb_string_ids_tab() - allocate unused string IDs in batch
* @cdev: the device whose string descriptor IDs are being allocated
* @str: an array of usb_string objects to assign numbers to
* Context: single threaded during gadget setup
u_phy->otg->host = hcd_to_bus(hcd);
irq = platform_get_irq(pdev, 0);
- if (!irq) {
- err = -ENODEV;
+ if (irq < 0) {
+ err = irq;
goto cleanup_phy;
}
pdev->dev.coherent_dma_mask = ofdev->dev.coherent_dma_mask;
- if (!pdev->dev.dma_mask)
+ if (!pdev->dev.dma_mask) {
pdev->dev.dma_mask = &ofdev->dev.coherent_dma_mask;
- else
- dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
+ } else {
+ retval = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (retval)
+ goto error;
+ }
retval = platform_device_add_data(pdev, pdata, sizeof(*pdata));
if (retval)
if (!rhub->num_ports)
return;
- rhub->ports = kcalloc_node(rhub->num_ports, sizeof(rhub->ports), flags,
- dev_to_node(dev));
+ rhub->ports = kcalloc_node(rhub->num_ports, sizeof(*rhub->ports),
+ flags, dev_to_node(dev));
for (i = 0; i < HCS_MAX_PORTS(xhci->hcs_params1); i++) {
if (xhci->hw_ports[i].rhub != rhub ||
xhci->hw_ports[i].hcd_portnum == DUPLICATE_ENTRY)
#define SSIC_PORT_CFG2_OFFSET 0x30
#define PROG_DONE (1 << 30)
#define SSIC_PORT_UNUSED (1 << 31)
+#define SPARSE_DISABLE_BIT 17
+#define SPARSE_CNTL_ENABLE 0xC12C
/* Device for a quirk */
#define PCI_VENDOR_ID_FRESCO_LOGIC 0x1b73
(pdev->device == 0x15e0 || pdev->device == 0x15e1))
xhci->quirks |= XHCI_SNPS_BROKEN_SUSPEND;
+ if (pdev->vendor == PCI_VENDOR_ID_AMD && pdev->device == 0x15e5)
+ xhci->quirks |= XHCI_DISABLE_SPARSE;
+
if (pdev->vendor == PCI_VENDOR_ID_AMD)
xhci->quirks |= XHCI_TRUST_TX_LENGTH;
readl(reg);
}
+static void xhci_sparse_control_quirk(struct usb_hcd *hcd)
+{
+ u32 reg;
+
+ reg = readl(hcd->regs + SPARSE_CNTL_ENABLE);
+ reg &= ~BIT(SPARSE_DISABLE_BIT);
+ writel(reg, hcd->regs + SPARSE_CNTL_ENABLE);
+}
+
static int xhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
if (xhci->quirks & XHCI_SSIC_PORT_UNUSED)
xhci_ssic_port_unused_quirk(hcd, true);
+ if (xhci->quirks & XHCI_DISABLE_SPARSE)
+ xhci_sparse_control_quirk(hcd);
+
ret = xhci_suspend(xhci, do_wakeup);
if (ret && (xhci->quirks & XHCI_SSIC_PORT_UNUSED))
xhci_ssic_port_unused_quirk(hcd, false);
xhci_dbg(xhci, "Slot %u ep ctx %u now has streams.\n",
udev->slot_id, ep_index);
vdev->eps[ep_index].ep_state |= EP_HAS_STREAMS;
- xhci_debugfs_create_stream_files(xhci, vdev, ep_index);
}
xhci_free_command(xhci, config_cmd);
spin_unlock_irqrestore(&xhci->lock, flags);
+ for (i = 0; i < num_eps; i++) {
+ ep_index = xhci_get_endpoint_index(&eps[i]->desc);
+ xhci_debugfs_create_stream_files(xhci, vdev, ep_index);
+ }
/* Subtract 1 for stream 0, which drivers can't use */
return num_streams - 1;
#define XHCI_SNPS_BROKEN_SUSPEND BIT_ULL(35)
#define XHCI_RENESAS_FW_QUIRK BIT_ULL(36)
#define XHCI_SKIP_PHY_INIT BIT_ULL(37)
+#define XHCI_DISABLE_SPARSE BIT_ULL(38)
unsigned int num_active_eps;
unsigned int limit_active_eps;
.property_is_writeable = apple_mfi_fc_property_is_writeable
};
+static bool mfi_fc_match(struct usb_device *udev)
+{
+ int idProduct;
+
+ idProduct = le16_to_cpu(udev->descriptor.idProduct);
+ /* See comment above mfi_fc_id_table[] */
+ return (idProduct >= 0x1200 && idProduct <= 0x12ff);
+}
+
static int mfi_fc_probe(struct usb_device *udev)
{
struct power_supply_config battery_cfg = {};
struct mfi_device *mfi = NULL;
- int err, idProduct;
+ int err;
- idProduct = le16_to_cpu(udev->descriptor.idProduct);
- /* See comment above mfi_fc_id_table[] */
- if (idProduct < 0x1200 || idProduct > 0x12ff) {
+ if (!mfi_fc_match(udev))
return -ENODEV;
- }
mfi = kzalloc(sizeof(struct mfi_device), GFP_KERNEL);
if (!mfi) {
.probe = mfi_fc_probe,
.disconnect = mfi_fc_disconnect,
.id_table = mfi_fc_id_table,
+ .match = mfi_fc_match,
.generic_subclass = 1,
};
EXPORT_SYMBOL_GPL(fwnode_typec_switch_get);
/**
- * typec_put_switch - Release USB Type-C orientation switch
+ * typec_switch_put - Release USB Type-C orientation switch
* @sw: USB Type-C orientation switch
*
* Decrement reference count for @sw.
*/
ret = fwnode_property_read_string(fwnode, "power-role", &cap_str);
if (!ret) {
- chip->port_type = typec_find_port_power_role(cap_str);
- if (chip->port_type < 0) {
- ret = chip->port_type;
+ ret = typec_find_port_power_role(cap_str);
+ if (ret < 0)
return ret;
- }
+ chip->port_type = ret;
}
chip->capability.type = chip->port_type;
*/
ret = fwnode_property_read_string(fwnode, "power-opmode", &cap_str);
if (!ret) {
- chip->pwr_opmode = typec_find_pwr_opmode(cap_str);
+ ret = typec_find_pwr_opmode(cap_str);
/* Power delivery not yet supported */
- if (chip->pwr_opmode < 0 ||
- chip->pwr_opmode == TYPEC_PWR_MODE_PD) {
- ret = chip->pwr_opmode < 0 ? chip->pwr_opmode : -EINVAL;
- dev_err(chip->dev, "bad power operation mode: %d\n",
- chip->pwr_opmode);
- return ret;
+ if (ret < 0 || ret == TYPEC_PWR_MODE_PD) {
+ dev_err(chip->dev, "bad power operation mode: %d\n", ret);
+ return -EINVAL;
}
+ chip->pwr_opmode = ret;
}
return 0;
{ .compatible = "st,stusb1600", .data = &stusb1600_regmap_config},
{},
};
+MODULE_DEVICE_TABLE(of, stusb160x_of_match);
static int stusb160x_probe(struct i2c_client *client)
{
}
chip->port = typec_register_port(chip->dev, &chip->capability);
- if (!chip->port) {
- ret = -ENODEV;
+ if (IS_ERR(chip->port)) {
+ ret = PTR_ERR(chip->port);
goto all_reg_disable;
}
static void tcpm_detach(struct tcpm_port *port)
{
+ if (tcpm_port_is_disconnected(port))
+ port->hard_reset_count = 0;
+
if (!port->attached)
return;
port->tcpc->set_bist_data(port->tcpc, false);
}
- if (tcpm_port_is_disconnected(port))
- port->hard_reset_count = 0;
-
tcpm_reset_port(port);
}
u64 paend;
struct scatterlist *sg;
struct device *dma = mvdev->mdev->device;
- int ret;
for (map = vhost_iotlb_itree_first(iotlb, mr->start, mr->end - 1);
map; map = vhost_iotlb_itree_next(map, start, mr->end - 1)) {
done:
mr->log_size = log_entity_size;
mr->nsg = nsg;
- ret = dma_map_sg_attrs(dma, mr->sg_head.sgl, mr->nsg, DMA_BIDIRECTIONAL, 0);
- if (!ret)
+ err = dma_map_sg_attrs(dma, mr->sg_head.sgl, mr->nsg, DMA_BIDIRECTIONAL, 0);
+ if (!err)
goto err_map;
err = create_direct_mr(mvdev, mr);
module_param(batch_mapping, int, 0444);
MODULE_PARM_DESC(batch_mapping, "Batched mapping 1 -Enable; 0 - Disable");
+static char *macaddr;
+module_param(macaddr, charp, 0);
+MODULE_PARM_DESC(macaddr, "Ethernet MAC address");
+
struct vdpasim_virtqueue {
struct vringh vring;
struct vringh_kiov iov;
static u64 vdpasim_features = (1ULL << VIRTIO_F_ANY_LAYOUT) |
(1ULL << VIRTIO_F_VERSION_1) |
- (1ULL << VIRTIO_F_ACCESS_PLATFORM);
+ (1ULL << VIRTIO_F_ACCESS_PLATFORM) |
+ (1ULL << VIRTIO_NET_F_MAC);
/* State of each vdpasim device */
struct vdpasim {
spin_lock_init(&vdpasim->iommu_lock);
dev = &vdpasim->vdpa.dev;
- dev->coherent_dma_mask = DMA_BIT_MASK(64);
+ dev->dma_mask = &dev->coherent_dma_mask;
+ if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
+ goto err_iommu;
set_dma_ops(dev, &vdpasim_dma_ops);
vdpasim->iommu = vhost_iotlb_alloc(2048, 0);
if (!vdpasim->buffer)
goto err_iommu;
- eth_random_addr(vdpasim->config.mac);
+ if (macaddr) {
+ mac_pton(macaddr, vdpasim->config.mac);
+ if (!is_valid_ether_addr(vdpasim->config.mac)) {
+ ret = -EADDRNOTAVAIL;
+ goto err_iommu;
+ }
+ } else {
+ eth_random_addr(vdpasim->config.mac);
+ }
vringh_set_iotlb(&vdpasim->vqs[0].vring, vdpasim->iommu);
vringh_set_iotlb(&vdpasim->vqs[1].vring, vdpasim->iommu);
return vdpasim->generation;
}
+static struct vdpa_iova_range vdpasim_get_iova_range(struct vdpa_device *vdpa)
+{
+ struct vdpa_iova_range range = {
+ .first = 0ULL,
+ .last = ULLONG_MAX,
+ };
+
+ return range;
+}
+
static int vdpasim_set_map(struct vdpa_device *vdpa,
struct vhost_iotlb *iotlb)
{
.get_config = vdpasim_get_config,
.set_config = vdpasim_set_config,
.get_generation = vdpasim_get_generation,
+ .get_iova_range = vdpasim_get_iova_range,
.dma_map = vdpasim_dma_map,
.dma_unmap = vdpasim_dma_unmap,
.free = vdpasim_free,
.get_config = vdpasim_get_config,
.set_config = vdpasim_set_config,
.get_generation = vdpasim_get_generation,
+ .get_iova_range = vdpasim_get_iova_range,
.set_map = vdpasim_set_map,
.free = vdpasim_free,
};
int minor;
struct eventfd_ctx *config_ctx;
int in_batch;
+ struct vdpa_iova_range range;
};
static DEFINE_IDA(vhost_vdpa_ida);
vq->call_ctx.producer.token = vq->call_ctx.ctx;
vq->call_ctx.producer.irq = irq;
ret = irq_bypass_register_producer(&vq->call_ctx.producer);
+ if (unlikely(ret))
+ dev_info(&v->dev, "vq %u, irq bypass producer (token %p) registration fails, ret = %d\n",
+ qid, vq->call_ctx.producer.token, ret);
}
static void vhost_vdpa_unsetup_vq_irq(struct vhost_vdpa *v, u16 qid)
return 0;
}
+static long vhost_vdpa_get_iova_range(struct vhost_vdpa *v, u32 __user *argp)
+{
+ struct vhost_vdpa_iova_range range = {
+ .first = v->range.first,
+ .last = v->range.last,
+ };
+
+ return copy_to_user(argp, &range, sizeof(range));
+}
+
static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
void __user *argp)
{
void __user *argp = (void __user *)arg;
u64 __user *featurep = argp;
u64 features;
- long r;
+ long r = 0;
if (cmd == VHOST_SET_BACKEND_FEATURES) {
- r = copy_from_user(&features, featurep, sizeof(features));
- if (r)
- return r;
+ if (copy_from_user(&features, featurep, sizeof(features)))
+ return -EFAULT;
if (features & ~VHOST_VDPA_BACKEND_FEATURES)
return -EOPNOTSUPP;
vhost_set_backend_features(&v->vdev, features);
break;
case VHOST_GET_BACKEND_FEATURES:
features = VHOST_VDPA_BACKEND_FEATURES;
- r = copy_to_user(featurep, &features, sizeof(features));
+ if (copy_to_user(featurep, &features, sizeof(features)))
+ r = -EFAULT;
+ break;
+ case VHOST_VDPA_GET_IOVA_RANGE:
+ r = vhost_vdpa_get_iova_range(v, argp);
break;
default:
r = vhost_dev_ioctl(&v->vdev, cmd, argp);
struct vhost_dev *dev = &v->vdev;
struct vhost_iotlb *iotlb = dev->iotlb;
struct page **page_list;
- struct vm_area_struct **vmas;
+ unsigned long list_size = PAGE_SIZE / sizeof(struct page *);
unsigned int gup_flags = FOLL_LONGTERM;
- unsigned long map_pfn, last_pfn = 0;
- unsigned long npages, lock_limit;
- unsigned long i, nmap = 0;
+ unsigned long npages, cur_base, map_pfn, last_pfn = 0;
+ unsigned long locked, lock_limit, pinned, i;
u64 iova = msg->iova;
- long pinned;
int ret = 0;
+ if (msg->iova < v->range.first ||
+ msg->iova + msg->size - 1 > v->range.last)
+ return -EINVAL;
+
if (vhost_iotlb_itree_first(iotlb, msg->iova,
msg->iova + msg->size - 1))
return -EEXIST;
+ page_list = (struct page **) __get_free_page(GFP_KERNEL);
+ if (!page_list)
+ return -ENOMEM;
+
if (msg->perm & VHOST_ACCESS_WO)
gup_flags |= FOLL_WRITE;
if (!npages)
return -EINVAL;
- page_list = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
- vmas = kvmalloc_array(npages, sizeof(struct vm_area_struct *),
- GFP_KERNEL);
- if (!page_list || !vmas) {
- ret = -ENOMEM;
- goto free;
- }
-
mmap_read_lock(dev->mm);
+ locked = atomic64_add_return(npages, &dev->mm->pinned_vm);
lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
- if (npages + atomic64_read(&dev->mm->pinned_vm) > lock_limit) {
- ret = -ENOMEM;
- goto unlock;
- }
- pinned = pin_user_pages(msg->uaddr & PAGE_MASK, npages, gup_flags,
- page_list, vmas);
- if (npages != pinned) {
- if (pinned < 0) {
- ret = pinned;
- } else {
- unpin_user_pages(page_list, pinned);
- ret = -ENOMEM;
- }
- goto unlock;
+ if (locked > lock_limit) {
+ ret = -ENOMEM;
+ goto out;
}
+ cur_base = msg->uaddr & PAGE_MASK;
iova &= PAGE_MASK;
- map_pfn = page_to_pfn(page_list[0]);
-
- /* One more iteration to avoid extra vdpa_map() call out of loop. */
- for (i = 0; i <= npages; i++) {
- unsigned long this_pfn;
- u64 csize;
-
- /* The last chunk may have no valid PFN next to it */
- this_pfn = i < npages ? page_to_pfn(page_list[i]) : -1UL;
-
- if (last_pfn && (this_pfn == -1UL ||
- this_pfn != last_pfn + 1)) {
- /* Pin a contiguous chunk of memory */
- csize = last_pfn - map_pfn + 1;
- ret = vhost_vdpa_map(v, iova, csize << PAGE_SHIFT,
- map_pfn << PAGE_SHIFT,
- msg->perm);
- if (ret) {
- /*
- * Unpin the rest chunks of memory on the
- * flight with no corresponding vdpa_map()
- * calls having been made yet. On the other
- * hand, vdpa_unmap() in the failure path
- * is in charge of accounting the number of
- * pinned pages for its own.
- * This asymmetrical pattern of accounting
- * is for efficiency to pin all pages at
- * once, while there is no other callsite
- * of vdpa_map() than here above.
- */
- unpin_user_pages(&page_list[nmap],
- npages - nmap);
- goto out;
+
+ while (npages) {
+ pinned = min_t(unsigned long, npages, list_size);
+ ret = pin_user_pages(cur_base, pinned,
+ gup_flags, page_list, NULL);
+ if (ret != pinned)
+ goto out;
+
+ if (!last_pfn)
+ map_pfn = page_to_pfn(page_list[0]);
+
+ for (i = 0; i < ret; i++) {
+ unsigned long this_pfn = page_to_pfn(page_list[i]);
+ u64 csize;
+
+ if (last_pfn && (this_pfn != last_pfn + 1)) {
+ /* Pin a contiguous chunk of memory */
+ csize = (last_pfn - map_pfn + 1) << PAGE_SHIFT;
+ if (vhost_vdpa_map(v, iova, csize,
+ map_pfn << PAGE_SHIFT,
+ msg->perm))
+ goto out;
+ map_pfn = this_pfn;
+ iova += csize;
}
- atomic64_add(csize, &dev->mm->pinned_vm);
- nmap += csize;
- iova += csize << PAGE_SHIFT;
- map_pfn = this_pfn;
+
+ last_pfn = this_pfn;
}
- last_pfn = this_pfn;
+
+ cur_base += ret << PAGE_SHIFT;
+ npages -= ret;
}
- WARN_ON(nmap != npages);
+ /* Pin the rest chunk */
+ ret = vhost_vdpa_map(v, iova, (last_pfn - map_pfn + 1) << PAGE_SHIFT,
+ map_pfn << PAGE_SHIFT, msg->perm);
out:
- if (ret)
+ if (ret) {
vhost_vdpa_unmap(v, msg->iova, msg->size);
-unlock:
+ atomic64_sub(npages, &dev->mm->pinned_vm);
+ }
mmap_read_unlock(dev->mm);
-free:
- kvfree(vmas);
- kvfree(page_list);
+ free_page((unsigned long)page_list);
return ret;
}
v->domain = NULL;
}
+static void vhost_vdpa_set_iova_range(struct vhost_vdpa *v)
+{
+ struct vdpa_iova_range *range = &v->range;
+ struct iommu_domain_geometry geo;
+ struct vdpa_device *vdpa = v->vdpa;
+ const struct vdpa_config_ops *ops = vdpa->config;
+
+ if (ops->get_iova_range) {
+ *range = ops->get_iova_range(vdpa);
+ } else if (v->domain &&
+ !iommu_domain_get_attr(v->domain,
+ DOMAIN_ATTR_GEOMETRY, &geo) &&
+ geo.force_aperture) {
+ range->first = geo.aperture_start;
+ range->last = geo.aperture_end;
+ } else {
+ range->first = 0;
+ range->last = ULLONG_MAX;
+ }
+}
+
static int vhost_vdpa_open(struct inode *inode, struct file *filep)
{
struct vhost_vdpa *v;
if (r)
goto err_init_iotlb;
+ vhost_vdpa_set_iova_range(v);
+
filep->private_data = v;
return 0;
getmem_done:
remove_conflicting_framebuffers(info->apertures,
KBUILD_MODNAME, false);
- if (!gen2vm)
+
+ if (gen2vm) {
+ /* framebuffer is reallocated, clear screen_info to avoid misuse from kexec */
+ screen_info.lfb_size = 0;
+ screen_info.lfb_base = 0;
+ screen_info.orig_video_isVGA = 0;
+ } else {
pci_dev_put(pdev);
+ }
kfree(info->apertures);
return 0;
*/
void afs_unuse_cell(struct afs_net *net, struct afs_cell *cell, enum afs_cell_trace reason)
{
- unsigned int debug_id = cell->debug_id;
+ unsigned int debug_id;
time64_t now, expire_delay;
int u, a;
if (cell->vl_servers->nr_servers)
expire_delay = afs_cell_gc_delay;
+ debug_id = cell->debug_id;
u = atomic_read(&cell->ref);
a = atomic_dec_return(&cell->active);
trace_afs_cell(debug_id, u, a, reason);
if (ret < 0)
goto error;
- set_page_private(req->pages[i], 1);
- SetPagePrivate(req->pages[i]);
+ attach_page_private(req->pages[i], (void *)1);
unlock_page(req->pages[i]);
i++;
} else {
_enter("{{%llx:%llu}[%lu]}", dvnode->fid.vid, dvnode->fid.vnode, page->index);
- set_page_private(page, 0);
- ClearPagePrivate(page);
+ detach_page_private(page);
/* The directory will need reloading. */
if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags))
afs_stat_v(dvnode, n_inval);
/* we clean up only if the entire page is being invalidated */
- if (offset == 0 && length == PAGE_SIZE) {
- set_page_private(page, 0);
- ClearPagePrivate(page);
- }
+ if (offset == 0 && length == PAGE_SIZE)
+ detach_page_private(page);
}
index, gfp);
if (!page)
goto error;
- if (!PagePrivate(page)) {
- set_page_private(page, 1);
- SetPagePrivate(page);
- }
+ if (!PagePrivate(page))
+ attach_page_private(page, (void *)1);
dir_page = kmap(page);
}
.write_iter = afs_file_write,
.mmap = afs_file_mmap,
.splice_read = generic_file_splice_read,
+ .splice_write = iter_file_splice_write,
.fsync = afs_fsync,
.lock = afs_lock,
.flock = afs_flock,
return ret;
}
+/*
+ * Adjust the dirty region of the page on truncation or full invalidation,
+ * getting rid of the markers altogether if the region is entirely invalidated.
+ */
+static void afs_invalidate_dirty(struct page *page, unsigned int offset,
+ unsigned int length)
+{
+ struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
+ unsigned long priv;
+ unsigned int f, t, end = offset + length;
+
+ priv = page_private(page);
+
+ /* we clean up only if the entire page is being invalidated */
+ if (offset == 0 && length == thp_size(page))
+ goto full_invalidate;
+
+ /* If the page was dirtied by page_mkwrite(), the PTE stays writable
+ * and we don't get another notification to tell us to expand it
+ * again.
+ */
+ if (afs_is_page_dirty_mmapped(priv))
+ return;
+
+ /* We may need to shorten the dirty region */
+ f = afs_page_dirty_from(priv);
+ t = afs_page_dirty_to(priv);
+
+ if (t <= offset || f >= end)
+ return; /* Doesn't overlap */
+
+ if (f < offset && t > end)
+ return; /* Splits the dirty region - just absorb it */
+
+ if (f >= offset && t <= end)
+ goto undirty;
+
+ if (f < offset)
+ t = offset;
+ else
+ f = end;
+ if (f == t)
+ goto undirty;
+
+ priv = afs_page_dirty(f, t);
+ set_page_private(page, priv);
+ trace_afs_page_dirty(vnode, tracepoint_string("trunc"), page->index, priv);
+ return;
+
+undirty:
+ trace_afs_page_dirty(vnode, tracepoint_string("undirty"), page->index, priv);
+ clear_page_dirty_for_io(page);
+full_invalidate:
+ priv = (unsigned long)detach_page_private(page);
+ trace_afs_page_dirty(vnode, tracepoint_string("inval"), page->index, priv);
+}
+
/*
* invalidate part or all of a page
* - release a page and clean up its private data if offset is 0 (indicating
static void afs_invalidatepage(struct page *page, unsigned int offset,
unsigned int length)
{
- struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
- unsigned long priv;
-
_enter("{%lu},%u,%u", page->index, offset, length);
BUG_ON(!PageLocked(page));
+#ifdef CONFIG_AFS_FSCACHE
/* we clean up only if the entire page is being invalidated */
if (offset == 0 && length == PAGE_SIZE) {
-#ifdef CONFIG_AFS_FSCACHE
if (PageFsCache(page)) {
struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
fscache_wait_on_page_write(vnode->cache, page);
fscache_uncache_page(vnode->cache, page);
}
+ }
#endif
- if (PagePrivate(page)) {
- priv = page_private(page);
- trace_afs_page_dirty(vnode, tracepoint_string("inval"),
- page->index, priv);
- set_page_private(page, 0);
- ClearPagePrivate(page);
- }
- }
+ if (PagePrivate(page))
+ afs_invalidate_dirty(page, offset, length);
_leave("");
}
#endif
if (PagePrivate(page)) {
- priv = page_private(page);
+ priv = (unsigned long)detach_page_private(page);
trace_afs_page_dirty(vnode, tracepoint_string("rel"),
page->index, priv);
- set_page_private(page, 0);
- ClearPagePrivate(page);
}
/* indicate that the page can be released */
pgoff_t last; /* last page in mapping to deal with */
unsigned first_offset; /* offset into mapping[first] */
unsigned last_to; /* amount of mapping[last] */
+ bool laundering; /* Laundering page, PG_writeback not set */
} store;
struct {
struct iattr *attr;
u64 data_version;
} __packed;
+/*
+ * We use page->private to hold the amount of the page that we've written to,
+ * splitting the field into two parts. However, we need to represent a range
+ * 0...PAGE_SIZE, so we reduce the resolution if the size of the page
+ * exceeds what we can encode.
+ */
+#ifdef CONFIG_64BIT
+#define __AFS_PAGE_PRIV_MASK 0x7fffffffUL
+#define __AFS_PAGE_PRIV_SHIFT 32
+#define __AFS_PAGE_PRIV_MMAPPED 0x80000000UL
+#else
+#define __AFS_PAGE_PRIV_MASK 0x7fffUL
+#define __AFS_PAGE_PRIV_SHIFT 16
+#define __AFS_PAGE_PRIV_MMAPPED 0x8000UL
+#endif
+
+static inline unsigned int afs_page_dirty_resolution(void)
+{
+ int shift = PAGE_SHIFT - (__AFS_PAGE_PRIV_SHIFT - 1);
+ return (shift > 0) ? shift : 0;
+}
+
+static inline size_t afs_page_dirty_from(unsigned long priv)
+{
+ unsigned long x = priv & __AFS_PAGE_PRIV_MASK;
+
+ /* The lower bound is inclusive */
+ return x << afs_page_dirty_resolution();
+}
+
+static inline size_t afs_page_dirty_to(unsigned long priv)
+{
+ unsigned long x = (priv >> __AFS_PAGE_PRIV_SHIFT) & __AFS_PAGE_PRIV_MASK;
+
+ /* The upper bound is immediately beyond the region */
+ return (x + 1) << afs_page_dirty_resolution();
+}
+
+static inline unsigned long afs_page_dirty(size_t from, size_t to)
+{
+ unsigned int res = afs_page_dirty_resolution();
+ from >>= res;
+ to = (to - 1) >> res;
+ return (to << __AFS_PAGE_PRIV_SHIFT) | from;
+}
+
+static inline unsigned long afs_page_dirty_mmapped(unsigned long priv)
+{
+ return priv | __AFS_PAGE_PRIV_MMAPPED;
+}
+
+static inline bool afs_is_page_dirty_mmapped(unsigned long priv)
+{
+ return priv & __AFS_PAGE_PRIV_MMAPPED;
+}
+
#include <trace/events/afs.h>
/*****************************************************************************/
*/
int afs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata)
+ struct page **_page, void **fsdata)
{
struct afs_vnode *vnode = AFS_FS_I(file_inode(file));
struct page *page;
_enter("{%llx:%llu},{%lx},%u,%u",
vnode->fid.vid, vnode->fid.vnode, index, from, to);
- /* We want to store information about how much of a page is altered in
- * page->private.
- */
- BUILD_BUG_ON(PAGE_SIZE > 32768 && sizeof(page->private) < 8);
-
page = grab_cache_page_write_begin(mapping, index, flags);
if (!page)
return -ENOMEM;
SetPageUptodate(page);
}
- /* page won't leak in error case: it eventually gets cleaned off LRU */
- *pagep = page;
-
try_again:
/* See if this page is already partially written in a way that we can
* merge the new write with.
t = f = 0;
if (PagePrivate(page)) {
priv = page_private(page);
- f = priv & AFS_PRIV_MAX;
- t = priv >> AFS_PRIV_SHIFT;
+ f = afs_page_dirty_from(priv);
+ t = afs_page_dirty_to(priv);
ASSERTCMP(f, <=, t);
}
if (!test_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags) &&
(to < f || from > t))
goto flush_conflicting_write;
- if (from < f)
- f = from;
- if (to > t)
- t = to;
- } else {
- f = from;
- t = to;
}
- priv = (unsigned long)t << AFS_PRIV_SHIFT;
- priv |= f;
- trace_afs_page_dirty(vnode, tracepoint_string("begin"),
- page->index, priv);
- SetPagePrivate(page);
- set_page_private(page, priv);
+ *_page = page;
_leave(" = 0");
return 0;
flush_conflicting_write:
_debug("flush conflict");
ret = write_one_page(page);
- if (ret < 0) {
- _leave(" = %d", ret);
- return ret;
- }
+ if (ret < 0)
+ goto error;
ret = lock_page_killable(page);
- if (ret < 0) {
- _leave(" = %d", ret);
- return ret;
- }
+ if (ret < 0)
+ goto error;
goto try_again;
+
+error:
+ put_page(page);
+ _leave(" = %d", ret);
+ return ret;
}
/*
{
struct afs_vnode *vnode = AFS_FS_I(file_inode(file));
struct key *key = afs_file_key(file);
+ unsigned long priv;
+ unsigned int f, from = pos & (PAGE_SIZE - 1);
+ unsigned int t, to = from + copied;
loff_t i_size, maybe_i_size;
int ret;
SetPageUptodate(page);
}
+ if (PagePrivate(page)) {
+ priv = page_private(page);
+ f = afs_page_dirty_from(priv);
+ t = afs_page_dirty_to(priv);
+ if (from < f)
+ f = from;
+ if (to > t)
+ t = to;
+ priv = afs_page_dirty(f, t);
+ set_page_private(page, priv);
+ trace_afs_page_dirty(vnode, tracepoint_string("dirty+"),
+ page->index, priv);
+ } else {
+ priv = afs_page_dirty(from, to);
+ attach_page_private(page, (void *)priv);
+ trace_afs_page_dirty(vnode, tracepoint_string("dirty"),
+ page->index, priv);
+ }
+
set_page_dirty(page);
if (PageDirty(page))
_debug("dirtied");
ASSERTCMP(pv.nr, ==, count);
for (loop = 0; loop < count; loop++) {
- priv = page_private(pv.pages[loop]);
+ priv = (unsigned long)detach_page_private(pv.pages[loop]);
trace_afs_page_dirty(vnode, tracepoint_string("clear"),
pv.pages[loop]->index, priv);
- set_page_private(pv.pages[loop], 0);
end_page_writeback(pv.pages[loop]);
}
first += count;
op->ctime = op->file[0].scb.status.mtime_client;
afs_vnode_commit_status(op, &op->file[0]);
if (op->error == 0) {
- afs_pages_written_back(vnode, op->store.first, op->store.last);
+ if (!op->store.laundering)
+ afs_pages_written_back(vnode, op->store.first, op->store.last);
afs_stat_v(vnode, n_stores);
atomic_long_add((op->store.last * PAGE_SIZE + op->store.last_to) -
(op->store.first * PAGE_SIZE + op->store.first_offset),
*/
static int afs_store_data(struct address_space *mapping,
pgoff_t first, pgoff_t last,
- unsigned offset, unsigned to)
+ unsigned offset, unsigned to, bool laundering)
{
struct afs_vnode *vnode = AFS_FS_I(mapping->host);
struct afs_operation *op;
op->store.last = last;
op->store.first_offset = offset;
op->store.last_to = to;
+ op->store.laundering = laundering;
op->mtime = vnode->vfs_inode.i_mtime;
op->flags |= AFS_OPERATION_UNINTR;
op->ops = &afs_store_data_operation;
*/
start = primary_page->index;
priv = page_private(primary_page);
- offset = priv & AFS_PRIV_MAX;
- to = priv >> AFS_PRIV_SHIFT;
+ offset = afs_page_dirty_from(priv);
+ to = afs_page_dirty_to(priv);
trace_afs_page_dirty(vnode, tracepoint_string("store"),
primary_page->index, priv);
}
priv = page_private(page);
- f = priv & AFS_PRIV_MAX;
- t = priv >> AFS_PRIV_SHIFT;
+ f = afs_page_dirty_from(priv);
+ t = afs_page_dirty_to(priv);
if (f != 0 &&
!test_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags)) {
unlock_page(page);
if (end > i_size)
to = i_size & ~PAGE_MASK;
- ret = afs_store_data(mapping, first, last, offset, to);
+ ret = afs_store_data(mapping, first, last, offset, to, false);
switch (ret) {
case 0:
ret = count;
*/
wait_on_page_writeback(vmf->page);
- priv = (unsigned long)PAGE_SIZE << AFS_PRIV_SHIFT; /* To */
- priv |= 0; /* From */
+ priv = afs_page_dirty(0, PAGE_SIZE);
+ priv = afs_page_dirty_mmapped(priv);
trace_afs_page_dirty(vnode, tracepoint_string("mkwrite"),
vmf->page->index, priv);
- SetPagePrivate(vmf->page);
- set_page_private(vmf->page, priv);
+ if (PagePrivate(vmf->page))
+ set_page_private(vmf->page, priv);
+ else
+ attach_page_private(vmf->page, (void *)priv);
file_update_time(file);
sb_end_pagefault(inode->i_sb);
f = 0;
t = PAGE_SIZE;
if (PagePrivate(page)) {
- f = priv & AFS_PRIV_MAX;
- t = priv >> AFS_PRIV_SHIFT;
+ f = afs_page_dirty_from(priv);
+ t = afs_page_dirty_to(priv);
}
trace_afs_page_dirty(vnode, tracepoint_string("launder"),
page->index, priv);
- ret = afs_store_data(mapping, page->index, page->index, t, f);
+ ret = afs_store_data(mapping, page->index, page->index, t, f, true);
}
+ priv = (unsigned long)detach_page_private(page);
trace_afs_page_dirty(vnode, tracepoint_string("laundered"),
page->index, priv);
- set_page_private(page, 0);
- ClearPagePrivate(page);
#ifdef CONFIG_AFS_FSCACHE
if (PageFsCache(page)) {
if (acl->size <= size)
memcpy(buffer, acl->data, acl->size);
else
- op->error = -ERANGE;
+ ret = -ERANGE;
}
}
.set = afs_xattr_set_acl,
};
-static void yfs_acl_put(struct afs_operation *op)
-{
- yfs_free_opaque_acl(op->yacl);
-}
-
static const struct afs_operation_ops yfs_fetch_opaque_acl_operation = {
.issue_yfs_rpc = yfs_fs_fetch_opaque_acl,
.success = afs_acl_success,
static const struct afs_operation_ops yfs_store_opaque_acl2_operation = {
.issue_yfs_rpc = yfs_fs_store_opaque_acl2,
.success = afs_acl_success,
- .put = yfs_acl_put,
+ .put = afs_acl_put,
};
/*
memcpy(bp, acl->data, acl->size);
if (acl->size != size)
memset((void *)bp + acl->size, 0, size - acl->size);
+ bp += size / sizeof(__be32);
yfs_check_req(call, bp);
trace_afs_make_fs_call(call, &vp->fid);
struct elf_thread_core_info *next;
struct task_struct *task;
struct elf_prstatus prstatus;
- struct memelfnote notes[0];
+ struct memelfnote notes[];
};
struct elf_note_info {
int level = ref->level;
struct btrfs_key search_key = ref->key_for_search;
- root = btrfs_get_fs_root(fs_info, ref->root_id, false);
+ /*
+ * If we're search_commit_root we could possibly be holding locks on
+ * other tree nodes. This happens when qgroups does backref walks when
+ * adding new delayed refs. To deal with this we need to look in cache
+ * for the root, and if we don't find it then we need to search the
+ * tree_root's commit root, thus the btrfs_get_fs_root_commit_root usage
+ * here.
+ */
+ if (path->search_commit_root)
+ root = btrfs_get_fs_root_commit_root(fs_info, path, ref->root_id);
+ else
+ root = btrfs_get_fs_root(fs_info, ref->root_id, false);
if (IS_ERR(root)) {
ret = PTR_ERR(root);
goto out_free;
key.offset = 0;
btrfs_release_path(path);
}
+ btrfs_release_path(path);
list_for_each_entry(space_info, &info->space_info, list) {
int i;
int btrfs_reada_wait(void *handle);
void btrfs_reada_detach(void *handle);
int btree_readahead_hook(struct extent_buffer *eb, int err);
+void btrfs_reada_remove_dev(struct btrfs_device *dev);
+void btrfs_reada_undo_remove_dev(struct btrfs_device *dev);
static inline int is_fstree(u64 rootid)
{
}
btrfs_wait_ordered_roots(fs_info, U64_MAX, 0, (u64)-1);
+ if (!scrub_ret)
+ btrfs_reada_remove_dev(src_device);
+
/*
* We have to use this loop approach because at this point src_device
* has to be available for transaction commit to complete, yet new
while (1) {
trans = btrfs_start_transaction(root, 0);
if (IS_ERR(trans)) {
+ btrfs_reada_undo_remove_dev(src_device);
mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
return PTR_ERR(trans);
}
up_write(&dev_replace->rwsem);
mutex_unlock(&fs_info->chunk_mutex);
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
+ btrfs_reada_undo_remove_dev(src_device);
btrfs_rm_dev_replace_blocked(fs_info);
if (tgt_device)
btrfs_destroy_dev_replace_tgtdev(tgt_device);
return 0;
}
-struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root,
- struct btrfs_key *key)
+static struct btrfs_root *read_tree_root_path(struct btrfs_root *tree_root,
+ struct btrfs_path *path,
+ struct btrfs_key *key)
{
struct btrfs_root *root;
struct btrfs_fs_info *fs_info = tree_root->fs_info;
- struct btrfs_path *path;
u64 generation;
int ret;
int level;
- path = btrfs_alloc_path();
- if (!path)
- return ERR_PTR(-ENOMEM);
-
root = btrfs_alloc_root(fs_info, key->objectid, GFP_NOFS);
- if (!root) {
- ret = -ENOMEM;
- goto alloc_fail;
- }
+ if (!root)
+ return ERR_PTR(-ENOMEM);
ret = btrfs_find_root(tree_root, key, path,
&root->root_item, &root->root_key);
if (ret) {
if (ret > 0)
ret = -ENOENT;
- goto find_fail;
+ goto fail;
}
generation = btrfs_root_generation(&root->root_item);
if (IS_ERR(root->node)) {
ret = PTR_ERR(root->node);
root->node = NULL;
- goto find_fail;
+ goto fail;
} else if (!btrfs_buffer_uptodate(root->node, generation, 0)) {
ret = -EIO;
- goto find_fail;
+ goto fail;
}
root->commit_root = btrfs_root_node(root);
-out:
- btrfs_free_path(path);
return root;
-
-find_fail:
+fail:
btrfs_put_root(root);
-alloc_fail:
- root = ERR_PTR(ret);
- goto out;
+ return ERR_PTR(ret);
+}
+
+struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root,
+ struct btrfs_key *key)
+{
+ struct btrfs_root *root;
+ struct btrfs_path *path;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return ERR_PTR(-ENOMEM);
+ root = read_tree_root_path(tree_root, path, key);
+ btrfs_free_path(path);
+
+ return root;
}
/*
return root;
}
+static struct btrfs_root *btrfs_get_global_root(struct btrfs_fs_info *fs_info,
+ u64 objectid)
+{
+ if (objectid == BTRFS_ROOT_TREE_OBJECTID)
+ return btrfs_grab_root(fs_info->tree_root);
+ if (objectid == BTRFS_EXTENT_TREE_OBJECTID)
+ return btrfs_grab_root(fs_info->extent_root);
+ if (objectid == BTRFS_CHUNK_TREE_OBJECTID)
+ return btrfs_grab_root(fs_info->chunk_root);
+ if (objectid == BTRFS_DEV_TREE_OBJECTID)
+ return btrfs_grab_root(fs_info->dev_root);
+ if (objectid == BTRFS_CSUM_TREE_OBJECTID)
+ return btrfs_grab_root(fs_info->csum_root);
+ if (objectid == BTRFS_QUOTA_TREE_OBJECTID)
+ return btrfs_grab_root(fs_info->quota_root) ?
+ fs_info->quota_root : ERR_PTR(-ENOENT);
+ if (objectid == BTRFS_UUID_TREE_OBJECTID)
+ return btrfs_grab_root(fs_info->uuid_root) ?
+ fs_info->uuid_root : ERR_PTR(-ENOENT);
+ if (objectid == BTRFS_FREE_SPACE_TREE_OBJECTID)
+ return btrfs_grab_root(fs_info->free_space_root) ?
+ fs_info->free_space_root : ERR_PTR(-ENOENT);
+ return NULL;
+}
+
int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info,
struct btrfs_root *root)
{
struct btrfs_key key;
int ret;
- if (objectid == BTRFS_ROOT_TREE_OBJECTID)
- return btrfs_grab_root(fs_info->tree_root);
- if (objectid == BTRFS_EXTENT_TREE_OBJECTID)
- return btrfs_grab_root(fs_info->extent_root);
- if (objectid == BTRFS_CHUNK_TREE_OBJECTID)
- return btrfs_grab_root(fs_info->chunk_root);
- if (objectid == BTRFS_DEV_TREE_OBJECTID)
- return btrfs_grab_root(fs_info->dev_root);
- if (objectid == BTRFS_CSUM_TREE_OBJECTID)
- return btrfs_grab_root(fs_info->csum_root);
- if (objectid == BTRFS_QUOTA_TREE_OBJECTID)
- return btrfs_grab_root(fs_info->quota_root) ?
- fs_info->quota_root : ERR_PTR(-ENOENT);
- if (objectid == BTRFS_UUID_TREE_OBJECTID)
- return btrfs_grab_root(fs_info->uuid_root) ?
- fs_info->uuid_root : ERR_PTR(-ENOENT);
- if (objectid == BTRFS_FREE_SPACE_TREE_OBJECTID)
- return btrfs_grab_root(fs_info->free_space_root) ?
- fs_info->free_space_root : ERR_PTR(-ENOENT);
+ root = btrfs_get_global_root(fs_info, objectid);
+ if (root)
+ return root;
again:
root = btrfs_lookup_fs_root(fs_info, objectid);
if (root) {
return btrfs_get_root_ref(fs_info, objectid, anon_dev, true);
}
+/*
+ * btrfs_get_fs_root_commit_root - return a root for the given objectid
+ * @fs_info: the fs_info
+ * @objectid: the objectid we need to lookup
+ *
+ * This is exclusively used for backref walking, and exists specifically because
+ * of how qgroups does lookups. Qgroups will do a backref lookup at delayed ref
+ * creation time, which means we may have to read the tree_root in order to look
+ * up a fs root that is not in memory. If the root is not in memory we will
+ * read the tree root commit root and look up the fs root from there. This is a
+ * temporary root, it will not be inserted into the radix tree as it doesn't
+ * have the most uptodate information, it'll simply be discarded once the
+ * backref code is finished using the root.
+ */
+struct btrfs_root *btrfs_get_fs_root_commit_root(struct btrfs_fs_info *fs_info,
+ struct btrfs_path *path,
+ u64 objectid)
+{
+ struct btrfs_root *root;
+ struct btrfs_key key;
+
+ ASSERT(path->search_commit_root && path->skip_locking);
+
+ /*
+ * This can return -ENOENT if we ask for a root that doesn't exist, but
+ * since this is called via the backref walking code we won't be looking
+ * up a root that doesn't exist, unless there's corruption. So if root
+ * != NULL just return it.
+ */
+ root = btrfs_get_global_root(fs_info, objectid);
+ if (root)
+ return root;
+
+ root = btrfs_lookup_fs_root(fs_info, objectid);
+ if (root)
+ return root;
+
+ key.objectid = objectid;
+ key.type = BTRFS_ROOT_ITEM_KEY;
+ key.offset = (u64)-1;
+ root = read_tree_root_path(fs_info->tree_root, path, &key);
+ btrfs_release_path(path);
+
+ return root;
+}
+
/*
* called by the kthread helper functions to finally call the bio end_io
* functions. This is where read checksum verification actually happens
u64 objectid, bool check_ref);
struct btrfs_root *btrfs_get_new_fs_root(struct btrfs_fs_info *fs_info,
u64 objectid, dev_t anon_dev);
+struct btrfs_root *btrfs_get_fs_root_commit_root(struct btrfs_fs_info *fs_info,
+ struct btrfs_path *path,
+ u64 objectid);
void btrfs_free_fs_info(struct btrfs_fs_info *fs_info);
int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info);
struct btrfs_tree_block_info *bi;
if (item_size < sizeof(*ei) + sizeof(*bi)) {
btrfs_crit(info,
-"invalid extent item size for key (%llu, %u, %llu) owner %llu, has %u expect >= %lu",
+"invalid extent item size for key (%llu, %u, %llu) owner %llu, has %u expect >= %zu",
key.objectid, key.type, key.offset,
owner_objectid, item_size,
sizeof(*ei) + sizeof(*bi));
inode_lock_shared(inode);
ret = btrfs_direct_IO(iocb, to);
inode_unlock_shared(inode);
- if (ret < 0)
+ if (ret < 0 || !iov_iter_count(to) ||
+ iocb->ki_pos >= i_size_read(file_inode(iocb->ki_filp)))
return ret;
}
* clear_offset by our extent size.
*/
clear_offset += ins.offset;
- btrfs_dec_block_group_reservations(fs_info, ins.objectid);
last_alloc = ins.offset;
trans = insert_prealloc_file_extent(trans, inode, &ins, cur_offset);
+ /*
+ * Now that we inserted the prealloc extent we can finally
+ * decrement the number of reservations in the block group.
+ * If we did it before, we could race with relocation and have
+ * relocation miss the reserved extent, making it fail later.
+ */
+ btrfs_dec_block_group_reservations(fs_info, ins.objectid);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
btrfs_free_reserved_extent(fs_info, ins.objectid,
btrfs_item_key_to_cpu(leaf, &found_key, slot);
if (found_key.type == BTRFS_ROOT_REF_KEY) {
+
+ /* Release locks on tree_root before we access quota_root */
+ btrfs_release_path(path);
+
ret = add_qgroup_item(trans, quota_root,
found_key.offset);
if (ret) {
btrfs_abort_transaction(trans, ret);
goto out_free_path;
}
+ ret = btrfs_search_slot_for_read(tree_root, &found_key,
+ path, 1, 0);
+ if (ret < 0) {
+ btrfs_abort_transaction(trans, ret);
+ goto out_free_path;
+ }
+ if (ret > 0) {
+ /*
+ * Shouldn't happen, but in case it does we
+ * don't need to do the btrfs_next_item, just
+ * continue.
+ */
+ continue;
+ }
}
ret = btrfs_next_item(tree_root, path);
if (ret < 0) {
if (!dev->bdev)
continue;
+ if (test_bit(BTRFS_DEV_STATE_NO_READA, &dev->dev_state))
+ continue;
+
if (dev_replace_is_ongoing &&
dev == fs_info->dev_replace.tgtdev) {
/*
}
have_zone = 1;
}
+ if (!have_zone)
+ radix_tree_delete(&fs_info->reada_tree, index);
spin_unlock(&fs_info->reada_lock);
up_read(&fs_info->dev_replace.rwsem);
kref_put(&rc->refcnt, reada_control_release);
}
+
+/*
+ * Before removing a device (device replace or device remove ioctls), call this
+ * function to wait for all existing readahead requests on the device and to
+ * make sure no one queues more readahead requests for the device.
+ *
+ * Must be called without holding neither the device list mutex nor the device
+ * replace semaphore, otherwise it will deadlock.
+ */
+void btrfs_reada_remove_dev(struct btrfs_device *dev)
+{
+ struct btrfs_fs_info *fs_info = dev->fs_info;
+
+ /* Serialize with readahead extent creation at reada_find_extent(). */
+ spin_lock(&fs_info->reada_lock);
+ set_bit(BTRFS_DEV_STATE_NO_READA, &dev->dev_state);
+ spin_unlock(&fs_info->reada_lock);
+
+ /*
+ * There might be readahead requests added to the radix trees which
+ * were not yet added to the readahead work queue. We need to start
+ * them and wait for their completion, otherwise we can end up with
+ * use-after-free problems when dropping the last reference on the
+ * readahead extents and their zones, as they need to access the
+ * device structure.
+ */
+ reada_start_machine(fs_info);
+ btrfs_flush_workqueue(fs_info->readahead_workers);
+}
+
+/*
+ * If when removing a device (device replace or device remove ioctls) an error
+ * happens after calling btrfs_reada_remove_dev(), call this to undo what that
+ * function did. This is safe to call even if btrfs_reada_remove_dev() was not
+ * called before.
+ */
+void btrfs_reada_undo_remove_dev(struct btrfs_device *dev)
+{
+ spin_lock(&dev->fs_info->reada_lock);
+ clear_bit(BTRFS_DEV_STATE_NO_READA, &dev->dev_state);
+ spin_unlock(&dev->fs_info->reada_lock);
+}
u64 type;
u64 features;
bool mixed = false;
+ int raid_index;
+ int nparity;
+ int ncopies;
length = btrfs_chunk_length(leaf, chunk);
stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
sub_stripes = btrfs_chunk_sub_stripes(leaf, chunk);
type = btrfs_chunk_type(leaf, chunk);
+ raid_index = btrfs_bg_flags_to_raid_index(type);
+ ncopies = btrfs_raid_array[raid_index].ncopies;
+ nparity = btrfs_raid_array[raid_index].nparity;
if (!num_stripes) {
chunk_err(leaf, chunk, logical,
"invalid chunk num_stripes, have %u", num_stripes);
return -EUCLEAN;
}
+ if (num_stripes < ncopies) {
+ chunk_err(leaf, chunk, logical,
+ "invalid chunk num_stripes < ncopies, have %u < %d",
+ num_stripes, ncopies);
+ return -EUCLEAN;
+ }
+ if (nparity && num_stripes == nparity) {
+ chunk_err(leaf, chunk, logical,
+ "invalid chunk num_stripes == nparity, have %u == %d",
+ num_stripes, nparity);
+ return -EUCLEAN;
+ }
if (!IS_ALIGNED(logical, fs_info->sectorsize)) {
chunk_err(leaf, chunk, logical,
"invalid chunk logical, have %llu should aligned to %u",
atomic_set(&dev->reada_in_flight, 0);
atomic_set(&dev->dev_stats_ccnt, 0);
- btrfs_device_data_ordered_init(dev);
+ btrfs_device_data_ordered_init(dev, fs_info);
INIT_RADIX_TREE(&dev->reada_zones, GFP_NOFS & ~__GFP_DIRECT_RECLAIM);
INIT_RADIX_TREE(&dev->reada_extents, GFP_NOFS & ~__GFP_DIRECT_RECLAIM);
extent_io_tree_init(fs_info, &dev->alloc_state,
mutex_unlock(&uuid_mutex);
ret = btrfs_shrink_device(device, 0);
+ if (!ret)
+ btrfs_reada_remove_dev(device);
mutex_lock(&uuid_mutex);
if (ret)
goto error_undo;
return ret;
error_undo:
+ btrfs_reada_undo_remove_dev(device);
if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state)) {
mutex_lock(&fs_info->chunk_mutex);
list_add(&device->dev_alloc_list,
#if BITS_PER_LONG==32 && defined(CONFIG_SMP)
#include <linux/seqlock.h>
#define __BTRFS_NEED_DEVICE_DATA_ORDERED
-#define btrfs_device_data_ordered_init(device) \
- seqcount_init(&device->data_seqcount)
+#define btrfs_device_data_ordered_init(device, info) \
+ seqcount_mutex_init(&device->data_seqcount, &info->chunk_mutex)
#else
-#define btrfs_device_data_ordered_init(device) do { } while (0)
+#define btrfs_device_data_ordered_init(device, info) do { } while (0)
#endif
#define BTRFS_DEV_STATE_WRITEABLE (0)
#define BTRFS_DEV_STATE_MISSING (2)
#define BTRFS_DEV_STATE_REPLACE_TGT (3)
#define BTRFS_DEV_STATE_FLUSH_SENT (4)
+#define BTRFS_DEV_STATE_NO_READA (5)
struct btrfs_device {
struct list_head dev_list; /* device_list_mutex */
blk_status_t last_flush_error;
#ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED
- seqcount_t data_seqcount;
+ /* A seqcount_t with associated chunk_mutex (for lockdep) */
+ seqcount_mutex_t data_seqcount;
#endif
/* the internal btrfs device id */
static inline void \
btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \
{ \
- preempt_disable(); \
write_seqcount_begin(&dev->data_seqcount); \
dev->name = size; \
write_seqcount_end(&dev->data_seqcount); \
- preempt_enable(); \
}
#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPTION)
#define BTRFS_DEVICE_GETSET_FUNCS(name) \
_debug("reissue read");
ret = bmapping->a_ops->readpage(NULL, backpage);
if (ret < 0)
- goto unlock_discard;
+ goto discard;
}
/* but the page may have been read before the monitor was installed, so
unlock_discard:
unlock_page(backpage);
+discard:
spin_lock_irq(&object->work_lock);
list_del(&monitor->op_link);
spin_unlock_irq(&object->work_lock);
* file will be created in the root of the debugfs filesystem.
* @read_fn: function pointer called to print the seq_file content.
*/
-struct dentry *debugfs_create_devm_seqfile(struct device *dev, const char *name,
- struct dentry *parent,
- int (*read_fn)(struct seq_file *s,
- void *data))
+void debugfs_create_devm_seqfile(struct device *dev, const char *name,
+ struct dentry *parent,
+ int (*read_fn)(struct seq_file *s, void *data))
{
struct debugfs_devm_entry *entry;
if (IS_ERR(parent))
- return ERR_PTR(-ENOENT);
+ return;
entry = devm_kzalloc(dev, sizeof(*entry), GFP_KERNEL);
if (!entry)
- return ERR_PTR(-ENOMEM);
+ return;
entry->read = read_fn;
entry->dev = dev;
- return debugfs_create_file(name, S_IRUGO, parent, entry,
- &debugfs_devm_entry_ops);
+ debugfs_create_file(name, S_IRUGO, parent, entry,
+ &debugfs_devm_entry_ops);
}
EXPORT_SYMBOL_GPL(debugfs_create_devm_seqfile);
};
#ifdef CONFIG_UNICODE
-static int ext4_d_compare(const struct dentry *dentry, unsigned int len,
- const char *str, const struct qstr *name)
-{
- struct qstr qstr = {.name = str, .len = len };
- const struct dentry *parent = READ_ONCE(dentry->d_parent);
- const struct inode *inode = d_inode_rcu(parent);
- char strbuf[DNAME_INLINE_LEN];
-
- if (!inode || !IS_CASEFOLDED(inode) ||
- !EXT4_SB(inode->i_sb)->s_encoding) {
- if (len != name->len)
- return -1;
- return memcmp(str, name->name, len);
- }
-
- /*
- * If the dentry name is stored in-line, then it may be concurrently
- * modified by a rename. If this happens, the VFS will eventually retry
- * the lookup, so it doesn't matter what ->d_compare() returns.
- * However, it's unsafe to call utf8_strncasecmp() with an unstable
- * string. Therefore, we have to copy the name into a temporary buffer.
- */
- if (len <= DNAME_INLINE_LEN - 1) {
- memcpy(strbuf, str, len);
- strbuf[len] = 0;
- qstr.name = strbuf;
- /* prevent compiler from optimizing out the temporary buffer */
- barrier();
- }
-
- return ext4_ci_compare(inode, name, &qstr, false);
-}
-
-static int ext4_d_hash(const struct dentry *dentry, struct qstr *str)
-{
- const struct ext4_sb_info *sbi = EXT4_SB(dentry->d_sb);
- const struct unicode_map *um = sbi->s_encoding;
- const struct inode *inode = d_inode_rcu(dentry);
- unsigned char *norm;
- int len, ret = 0;
-
- if (!inode || !IS_CASEFOLDED(inode) || !um)
- return 0;
-
- norm = kmalloc(PATH_MAX, GFP_ATOMIC);
- if (!norm)
- return -ENOMEM;
-
- len = utf8_casefold(um, str, norm, PATH_MAX);
- if (len < 0) {
- if (ext4_has_strict_mode(sbi))
- ret = -EINVAL;
- goto out;
- }
- str->hash = full_name_hash(dentry, norm, len);
-out:
- kfree(norm);
- return ret;
-}
-
const struct dentry_operations ext4_dentry_ops = {
- .d_hash = ext4_d_hash,
- .d_compare = ext4_d_compare,
+ .d_hash = generic_ci_d_hash,
+ .d_compare = generic_ci_d_compare,
};
#endif
#define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */
#define EXT4_ERROR_FS 0x0002 /* Errors detected */
#define EXT4_ORPHAN_FS 0x0004 /* Orphans being recovered */
-#define EXT4_FC_INELIGIBLE 0x0008 /* Fast commit ineligible */
-#define EXT4_FC_COMMITTING 0x0010 /* File system underoing a fast
- * commit.
- */
#define EXT4_FC_REPLAY 0x0020 /* Fast commit replay ongoing */
/*
*/
#define EXT4_MF_MNTDIR_SAMPLED 0x0001
#define EXT4_MF_FS_ABORTED 0x0002 /* Fatal error detected */
+#define EXT4_MF_FC_INELIGIBLE 0x0004 /* Fast commit ineligible */
+#define EXT4_MF_FC_COMMITTING 0x0008 /* File system underoing a fast
+ * commit.
+ */
#ifdef CONFIG_FS_ENCRYPTION
#define DUMMY_ENCRYPTION_ENABLED(sbi) ((sbi)->s_dummy_enc_policy.policy != NULL)
#define EXT4_ENC_UTF8_12_1 1
-/*
- * Flags for ext4_sb_info.s_encoding_flags.
- */
-#define EXT4_ENC_STRICT_MODE_FL (1 << 0)
-
-#define ext4_has_strict_mode(sbi) \
- (sbi->s_encoding_flags & EXT4_ENC_STRICT_MODE_FL)
-
/*
* fourth extended-fs super-block data in memory
*/
struct kobject s_kobj;
struct completion s_kobj_unregister;
struct super_block *s_sb;
-#ifdef CONFIG_UNICODE
- struct unicode_map *s_encoding;
- __u16 s_encoding_flags;
-#endif
/* Journaling */
struct journal_s *s_journal;
}
/*
- * search the closest allocated block to the right for *logical
- * and returns it at @logical + it's physical address at @phys
- * if *logical is the largest allocated block, the function
- * returns 0 at @phys
- * return value contains 0 (success) or error code
+ * Search the closest allocated block to the right for *logical
+ * and returns it at @logical + it's physical address at @phys.
+ * If not exists, return 0 and @phys is set to 0. We will return
+ * 1 which means we found an allocated block and ret_ex is valid.
+ * Or return a (< 0) error code.
*/
static int ext4_ext_search_right(struct inode *inode,
struct ext4_ext_path *path,
ext4_lblk_t *logical, ext4_fsblk_t *phys,
- struct ext4_extent **ret_ex)
+ struct ext4_extent *ret_ex)
{
struct buffer_head *bh = NULL;
struct ext4_extent_header *eh;
found_extent:
*logical = le32_to_cpu(ex->ee_block);
*phys = ext4_ext_pblock(ex);
- *ret_ex = ex;
+ if (ret_ex)
+ *ret_ex = *ex;
if (bh)
put_bh(bh);
- return 0;
+ return 1;
}
/*
*/
lblk = ex_end + 1;
err = ext4_ext_search_right(inode, path, &lblk, &pblk,
- &ex);
- if (err)
+ NULL);
+ if (err < 0)
goto out;
if (pblk) {
partial.pclu = EXT4_B2C(sbi, pblk);
struct ext4_map_blocks *map, int flags)
{
struct ext4_ext_path *path = NULL;
- struct ext4_extent newex, *ex, *ex2;
+ struct ext4_extent newex, *ex, ex2;
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
ext4_fsblk_t newblock = 0, pblk;
int err = 0, depth, ret;
if (err)
goto out;
ar.lright = map->m_lblk;
- ex2 = NULL;
err = ext4_ext_search_right(inode, path, &ar.lright, &ar.pright, &ex2);
- if (err)
+ if (err < 0)
goto out;
/* Check if the extent after searching to the right implies a
* cluster we can use. */
- if ((sbi->s_cluster_ratio > 1) && ex2 &&
- get_implied_cluster_alloc(inode->i_sb, map, ex2, path)) {
+ if ((sbi->s_cluster_ratio > 1) && err &&
+ get_implied_cluster_alloc(inode->i_sb, map, &ex2, path)) {
ar.len = allocated = map->m_len;
newblock = map->m_pblk;
goto got_allocated_blocks;
(EXT4_SB(sb)->s_mount_state & EXT4_FC_REPLAY))
return;
- sbi->s_mount_state |= EXT4_FC_INELIGIBLE;
+ sbi->s_mount_flags |= EXT4_MF_FC_INELIGIBLE;
WARN_ON(reason >= EXT4_FC_REASON_MAX);
sbi->s_fc_stats.fc_ineligible_reason_count[reason]++;
}
}
/*
- * Stop a fast commit ineligible update. We set EXT4_FC_INELIGIBLE flag here
+ * Stop a fast commit ineligible update. We set EXT4_MF_FC_INELIGIBLE flag here
* to ensure that after stopping the ineligible update, at least one full
* commit takes place.
*/
(EXT4_SB(sb)->s_mount_state & EXT4_FC_REPLAY))
return;
- EXT4_SB(sb)->s_mount_state |= EXT4_FC_INELIGIBLE;
+ EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FC_INELIGIBLE;
atomic_dec(&EXT4_SB(sb)->s_fc_ineligible_updates);
}
static inline int ext4_fc_is_ineligible(struct super_block *sb)
{
- return (EXT4_SB(sb)->s_mount_state & EXT4_FC_INELIGIBLE) ||
+ return (EXT4_SB(sb)->s_mount_flags & EXT4_MF_FC_INELIGIBLE) ||
atomic_read(&EXT4_SB(sb)->s_fc_ineligible_updates);
}
spin_lock(&sbi->s_fc_lock);
if (list_empty(&EXT4_I(inode)->i_fc_list))
list_add_tail(&EXT4_I(inode)->i_fc_list,
- (sbi->s_mount_state & EXT4_FC_COMMITTING) ?
+ (sbi->s_mount_flags & EXT4_MF_FC_COMMITTING) ?
&sbi->s_fc_q[FC_Q_STAGING] :
&sbi->s_fc_q[FC_Q_MAIN]);
spin_unlock(&sbi->s_fc_lock);
node->fcd_name.len = dentry->d_name.len;
spin_lock(&sbi->s_fc_lock);
- if (sbi->s_mount_state & EXT4_FC_COMMITTING)
+ if (sbi->s_mount_flags & EXT4_MF_FC_COMMITTING)
list_add_tail(&node->fcd_list,
&sbi->s_fc_dentry_q[FC_Q_STAGING]);
else
int ret = 0;
spin_lock(&sbi->s_fc_lock);
- sbi->s_mount_state |= EXT4_FC_COMMITTING;
+ sbi->s_mount_flags |= EXT4_MF_FC_COMMITTING;
list_for_each(pos, &sbi->s_fc_q[FC_Q_MAIN]) {
ei = list_entry(pos, struct ext4_inode_info, i_fc_list);
ext4_set_inode_state(&ei->vfs_inode, EXT4_STATE_FC_COMMITTING);
fc_dentry->fcd_parent, fc_dentry->fcd_ino,
fc_dentry->fcd_name.len,
fc_dentry->fcd_name.name, crc)) {
- spin_lock(&sbi->s_fc_lock);
ret = -ENOSPC;
goto lock_and_exit;
}
list_splice_init(&sbi->s_fc_q[FC_Q_STAGING],
&sbi->s_fc_q[FC_Q_STAGING]);
- sbi->s_mount_state &= ~EXT4_FC_COMMITTING;
- sbi->s_mount_state &= ~EXT4_FC_INELIGIBLE;
+ sbi->s_mount_flags &= ~EXT4_MF_FC_COMMITTING;
+ sbi->s_mount_flags &= ~EXT4_MF_FC_INELIGIBLE;
if (full)
sbi->s_fc_bytes = 0;
if (ret == 0) {
/* Range is not mapped */
path = ext4_find_extent(inode, cur, NULL, 0);
- if (!path)
- continue;
+ if (IS_ERR(path)) {
+ iput(inode);
+ return 0;
+ }
memset(&newex, 0, sizeof(newex));
newex.ee_block = cpu_to_le32(cur);
ext4_ext_store_pblock(
void ext4_fc_init(struct super_block *sb, journal_t *journal)
{
+ int num_fc_blocks;
+
/*
* We set replay callback even if fast commit disabled because we may
* could still have fast commit blocks that need to be replayed even if
if (!test_opt2(sb, JOURNAL_FAST_COMMIT))
return;
journal->j_fc_cleanup_callback = ext4_fc_cleanup;
- if (jbd2_fc_init(journal, EXT4_NUM_FC_BLKS)) {
+ if (!buffer_uptodate(journal->j_sb_buffer)
+ && ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO,
+ true)) {
+ ext4_msg(sb, KERN_ERR, "I/O error on journal");
+ return;
+ }
+ num_fc_blocks = be32_to_cpu(journal->j_superblock->s_num_fc_blks);
+ if (jbd2_fc_init(journal, num_fc_blocks ? num_fc_blocks :
+ EXT4_NUM_FC_BLKS)) {
pr_warn("Error while enabling fast commits, turning off.");
ext4_clear_feature_fast_commit(sb);
}
struct dx_hash_info *hinfo)
{
#ifdef CONFIG_UNICODE
- const struct unicode_map *um = EXT4_SB(dir->i_sb)->s_encoding;
+ const struct unicode_map *um = dir->i_sb->s_encoding;
int r, dlen;
unsigned char *buff;
struct qstr qstr = {.name = name, .len = len };
}
if (ret == 0)
ret = err;
- err = ext4_jbd2_inode_add_write(handle, inode, 0, len);
+ err = ext4_jbd2_inode_add_write(handle, inode, page_offset(page), len);
if (ret == 0)
ret = err;
EXT4_I(inode)->i_datasync_tid = handle->h_transaction->t_tid;
if (journal) {
if (jbd2_transaction_committed(journal,
- EXT4_I(inode)->i_datasync_tid))
- return true;
- return atomic_read(&EXT4_SB(inode->i_sb)->s_fc_subtid) >=
- EXT4_I(inode)->i_fc_committed_subtid;
+ EXT4_I(inode)->i_datasync_tid))
+ return false;
+ if (test_opt2(inode->i_sb, JOURNAL_FAST_COMMIT))
+ return atomic_read(&EXT4_SB(inode->i_sb)->s_fc_subtid) <
+ EXT4_I(inode)->i_fc_committed_subtid;
+ return true;
}
/* Any metadata buffers to write? */
if (ext4_walk_page_buffers(handle, page_buffers(page),
0, len, NULL, write_end_fn))
goto out_error;
- if (ext4_jbd2_inode_add_write(handle, inode, 0, len))
+ if (ext4_jbd2_inode_add_write(handle, inode,
+ page_offset(page), len))
goto out_error;
ext4_set_inode_state(inode, EXT4_STATE_JDATA);
} else {
int ext4_ci_compare(const struct inode *parent, const struct qstr *name,
const struct qstr *entry, bool quick)
{
- const struct ext4_sb_info *sbi = EXT4_SB(parent->i_sb);
- const struct unicode_map *um = sbi->s_encoding;
+ const struct super_block *sb = parent->i_sb;
+ const struct unicode_map *um = sb->s_encoding;
int ret;
if (quick)
/* Handle invalid character sequence as either an error
* or as an opaque byte sequence.
*/
- if (ext4_has_strict_mode(sbi))
+ if (sb_has_strict_encoding(sb))
return -EINVAL;
if (name->len != entry->len)
{
int len;
- if (!IS_CASEFOLDED(dir) || !EXT4_SB(dir->i_sb)->s_encoding) {
+ if (!IS_CASEFOLDED(dir) || !dir->i_sb->s_encoding) {
cf_name->name = NULL;
return;
}
if (!cf_name->name)
return;
- len = utf8_casefold(EXT4_SB(dir->i_sb)->s_encoding,
+ len = utf8_casefold(dir->i_sb->s_encoding,
iname, cf_name->name,
EXT4_NAME_LEN);
if (len <= 0) {
#endif
#ifdef CONFIG_UNICODE
- if (EXT4_SB(parent->i_sb)->s_encoding && IS_CASEFOLDED(parent)) {
+ if (parent->i_sb->s_encoding && IS_CASEFOLDED(parent)) {
if (fname->cf_name.name) {
struct qstr cf = {.name = fname->cf_name.name,
.len = fname->cf_name.len};
struct buffer_head *bh = NULL;
struct ext4_dir_entry_2 *de;
struct super_block *sb;
-#ifdef CONFIG_UNICODE
- struct ext4_sb_info *sbi;
-#endif
struct ext4_filename fname;
int retval;
int dx_fallback=0;
return -EINVAL;
#ifdef CONFIG_UNICODE
- sbi = EXT4_SB(sb);
- if (ext4_has_strict_mode(sbi) && IS_CASEFOLDED(dir) &&
- sbi->s_encoding && utf8_validate(sbi->s_encoding, &dentry->d_name))
+ if (sb_has_strict_encoding(sb) && IS_CASEFOLDED(dir) &&
+ sb->s_encoding && utf8_validate(sb->s_encoding, &dentry->d_name))
return -EINVAL;
#endif
fs_put_dax(sbi->s_daxdev);
fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy);
#ifdef CONFIG_UNICODE
- utf8_unload(sbi->s_encoding);
+ utf8_unload(sb->s_encoding);
#endif
kfree(sbi);
}
goto failed_mount;
#ifdef CONFIG_UNICODE
- if (ext4_has_feature_casefold(sb) && !sbi->s_encoding) {
+ if (ext4_has_feature_casefold(sb) && !sb->s_encoding) {
const struct ext4_sb_encodings *encoding_info;
struct unicode_map *encoding;
__u16 encoding_flags;
"%s-%s with flags 0x%hx", encoding_info->name,
encoding_info->version?:"\b", encoding_flags);
- sbi->s_encoding = encoding;
- sbi->s_encoding_flags = encoding_flags;
+ sb->s_encoding = encoding;
+ sb->s_encoding_flags = encoding_flags;
}
#endif
INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]);
INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]);
sbi->s_fc_bytes = 0;
- sbi->s_mount_state &= ~EXT4_FC_INELIGIBLE;
- sbi->s_mount_state &= ~EXT4_FC_COMMITTING;
+ sbi->s_mount_flags &= ~EXT4_MF_FC_INELIGIBLE;
+ sbi->s_mount_flags &= ~EXT4_MF_FC_COMMITTING;
spin_lock_init(&sbi->s_fc_lock);
memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats));
sbi->s_fc_replay_state.fc_regions = NULL;
}
#ifdef CONFIG_UNICODE
- if (sbi->s_encoding)
+ if (sb->s_encoding)
sb->s_d_op = &ext4_dentry_ops;
#endif
crypto_free_shash(sbi->s_chksum_driver);
#ifdef CONFIG_UNICODE
- utf8_unload(sbi->s_encoding);
+ utf8_unload(sb->s_encoding);
#endif
#ifdef CONFIG_QUOTA
EXT4_ATTR_FEATURE(verity);
#endif
EXT4_ATTR_FEATURE(metadata_csum_seed);
+EXT4_ATTR_FEATURE(fast_commit);
static struct attribute *ext4_feat_attrs[] = {
ATTR_LIST(lazy_itable_init),
ATTR_LIST(verity),
#endif
ATTR_LIST(metadata_csum_seed),
+ ATTR_LIST(fast_commit),
NULL,
};
ATTRIBUTE_GROUPS(ext4_feat);
wait_queue_head_t lock_wq;
atomic_t refcnt;
unsigned int page_offset;
- struct page *page[0];
+ struct page *page[];
};
#define HFS_BNODE_ERROR 0
wait_queue_head_t lock_wq;
atomic_t refcnt;
unsigned int page_offset;
- struct page *page[0];
+ struct page *page[];
};
#define HFS_BNODE_LOCK 0
io_req_init_async(req);
id = req->work.identity;
+ if (req->flags & REQ_F_FORCE_ASYNC)
+ req->work.flags |= IO_WQ_WORK_CONCURRENT;
+
if (req->flags & REQ_F_ISREG) {
if (def->hash_reg_file || (ctx->flags & IORING_SETUP_IOPOLL))
io_wq_hash_work(&req->work, file_inode(req->file));
percpu_ref_put(&ctx->refs);
}
-static bool io_link_cancel_timeout(struct io_kiocb *req)
+static void io_kill_linked_timeout(struct io_kiocb *req)
{
- struct io_timeout_data *io = req->async_data;
struct io_ring_ctx *ctx = req->ctx;
- int ret;
-
- ret = hrtimer_try_to_cancel(&io->timer);
- if (ret != -1) {
- io_cqring_fill_event(req, -ECANCELED);
- io_commit_cqring(ctx);
- req->flags &= ~REQ_F_LINK_HEAD;
- io_put_req_deferred(req, 1);
- return true;
- }
-
- return false;
-}
-
-static bool __io_kill_linked_timeout(struct io_kiocb *req)
-{
struct io_kiocb *link;
- bool wake_ev;
+ bool cancelled = false;
+ unsigned long flags;
- if (list_empty(&req->link_list))
- return false;
- link = list_first_entry(&req->link_list, struct io_kiocb, link_list);
- if (link->opcode != IORING_OP_LINK_TIMEOUT)
- return false;
+ spin_lock_irqsave(&ctx->completion_lock, flags);
+ link = list_first_entry_or_null(&req->link_list, struct io_kiocb,
+ link_list);
/*
* Can happen if a linked timeout fired and link had been like
* req -> link t-out -> link t-out [-> ...]
*/
- if (!(link->flags & REQ_F_LTIMEOUT_ACTIVE))
- return false;
+ if (link && (link->flags & REQ_F_LTIMEOUT_ACTIVE)) {
+ struct io_timeout_data *io = link->async_data;
+ int ret;
- list_del_init(&link->link_list);
- wake_ev = io_link_cancel_timeout(link);
+ list_del_init(&link->link_list);
+ ret = hrtimer_try_to_cancel(&io->timer);
+ if (ret != -1) {
+ io_cqring_fill_event(link, -ECANCELED);
+ io_commit_cqring(ctx);
+ cancelled = true;
+ }
+ }
req->flags &= ~REQ_F_LINK_TIMEOUT;
- return wake_ev;
-}
-
-static void io_kill_linked_timeout(struct io_kiocb *req)
-{
- struct io_ring_ctx *ctx = req->ctx;
- unsigned long flags;
- bool wake_ev;
-
- spin_lock_irqsave(&ctx->completion_lock, flags);
- wake_ev = __io_kill_linked_timeout(req);
spin_unlock_irqrestore(&ctx->completion_lock, flags);
- if (wake_ev)
+ if (cancelled) {
io_cqring_ev_posted(ctx);
+ io_put_req(link);
+ }
}
static struct io_kiocb *io_req_link_next(struct io_kiocb *req)
/* make sure double remove sees this as being gone */
wait->private = NULL;
spin_unlock(&poll->head->lock);
- if (!done)
- __io_async_wake(req, poll, mask, io_poll_task_func);
+ if (!done) {
+ /* use wait func handler, so it matches the rq type */
+ poll->wait.func(&poll->wait, mode, sync, key);
+ }
}
refcount_dec(&req->refs);
return 1;
static void __io_queue_sqe(struct io_kiocb *req, struct io_comp_state *cs)
{
struct io_kiocb *linked_timeout;
- struct io_kiocb *nxt;
const struct cred *old_creds = NULL;
int ret;
*/
if (ret == -EAGAIN && !(req->flags & REQ_F_NOWAIT)) {
if (!io_arm_poll_handler(req)) {
-punt:
/*
* Queued up for async execution, worker will release
* submit reference when the iocb is actually submitted.
if (linked_timeout)
io_queue_linked_timeout(linked_timeout);
- goto exit;
- }
+ } else if (likely(!ret)) {
+ /* drop submission reference */
+ req = io_put_req_find_next(req);
+ if (linked_timeout)
+ io_queue_linked_timeout(linked_timeout);
- if (unlikely(ret)) {
+ if (req) {
+ if (!(req->flags & REQ_F_FORCE_ASYNC))
+ goto again;
+ io_queue_async_work(req);
+ }
+ } else {
/* un-prep timeout, so it'll be killed as any other linked */
req->flags &= ~REQ_F_LINK_TIMEOUT;
req_set_fail_links(req);
io_put_req(req);
io_req_complete(req, ret);
- goto exit;
}
- /* drop submission reference */
- nxt = io_put_req_find_next(req);
- if (linked_timeout)
- io_queue_linked_timeout(linked_timeout);
-
- if (nxt) {
- req = nxt;
-
- if (req->flags & REQ_F_FORCE_ASYNC) {
- linked_timeout = NULL;
- goto punt;
- }
- goto again;
- }
-exit:
if (old_creds)
revert_creds(old_creds);
}
if (unlikely(ret))
goto fail_req;
}
-
- /*
- * Never try inline submit of IOSQE_ASYNC is set, go straight
- * to async execution.
- */
- io_req_init_async(req);
- req->work.flags |= IO_WQ_WORK_CONCURRENT;
io_queue_async_work(req);
} else {
if (sqe) {
__u8 len_des;
__u8 len_src;
__u8 ext_ver;
- __u8 data[0];
+ __u8 data[];
} __attribute__ ((packed));
struct RR_RR_s {
struct SL_component {
__u8 flags;
__u8 len;
- __u8 text[0];
+ __u8 text[];
} __attribute__ ((packed));
struct RR_SL_s {
struct RR_NM_s {
__u8 flags;
- char name[0];
+ char name[];
} __attribute__ ((packed));
struct RR_CL_s {
struct RR_TF_s {
__u8 flags;
- struct stamp times[0]; /* Variable number of these beasts */
+ struct stamp times[]; /* Variable number of these beasts */
} __attribute__ ((packed));
/* Linux-specific extension for transparent decompression */
oom_adj = (task->signal->oom_score_adj * -OOM_DISABLE) /
OOM_SCORE_ADJ_MAX;
put_task_struct(task);
+ if (oom_adj > OOM_ADJUST_MAX)
+ oom_adj = OOM_ADJUST_MAX;
len = snprintf(buffer, sizeof(buffer), "%d\n", oom_adj);
return simple_read_from_buffer(buf, count, ppos, buffer, len);
}
struct poll_table_page {
struct poll_table_page * next;
struct poll_table_entry * entry;
- struct poll_table_entry entries[0];
+ struct poll_table_entry entries[];
};
#define POLL_TABLE_FULL(table) \
struct poll_list {
struct poll_list *next;
int len;
- struct pollfd entries[0];
+ struct pollfd entries[];
};
#define POLLFD_PER_PAGE ((PAGE_SIZE-sizeof(struct poll_list)) / sizeof(struct pollfd))
#ifdef CONFIG_UACCESS_MEMCPY
#include <asm/unaligned.h>
-static inline int __get_user_fn(size_t size, const void __user *from, void *to)
+static __always_inline int
+__get_user_fn(size_t size, const void __user *from, void *to)
{
BUILD_BUG_ON(!__builtin_constant_p(size));
}
#define __get_user_fn(sz, u, k) __get_user_fn(sz, u, k)
-static inline int __put_user_fn(size_t size, void __user *to, void *from)
+static __always_inline int
+__put_user_fn(size_t size, void __user *to, void *from)
{
BUILD_BUG_ON(!__builtin_constant_p(size));
#ifdef CONFIG_CONSTRUCTORS
#define KERNEL_CTORS() . = ALIGN(8); \
__ctors_start = .; \
+ KEEP(*(SORT(.ctors.*))) \
KEEP(*(.ctors)) \
KEEP(*(SORT(.init_array.*))) \
KEEP(*(.init_array)) \
* @link_rate: Requested Link rate from DPCD 0x219
* @num_lanes: Number of lanes requested by sing through DPCD 0x220
* @phy_pattern: DP Phy test pattern from DPCD 0x248
- * @hb2_reset: DP HBR2_COMPLIANCE_SCRAMBLER_RESET from DCPD 0x24A and 0x24B
+ * @hbr2_reset: DP HBR2_COMPLIANCE_SCRAMBLER_RESET from DCPD 0x24A and 0x24B
* @custom80: DP Test_80BIT_CUSTOM_PATTERN from DPCDs 0x250 through 0x259
* @enhanced_frame_cap: flag for enhanced frame capability.
*/
}
#endif
-/**
- * drm_edid_are_equal - compare two edid blobs.
- * @edid1: pointer to first blob
- * @edid2: pointer to second blob
- * This helper can be used during probing to determine if
- * edid had changed.
- */
bool drm_edid_are_equal(const struct edid *edid1, const struct edid *edid2);
int
const char *format, ...);
/**
- * Error output.
+ * DRM_DEV_ERROR() - Error output.
*
* @dev: device pointer
* @fmt: printf() like format string.
drm_dev_printk(dev, KERN_ERR, "*ERROR* " fmt, ##__VA_ARGS__)
/**
- * Rate limited error output. Like DRM_ERROR() but won't flood the log.
+ * DRM_DEV_ERROR_RATELIMITED() - Rate limited error output.
*
* @dev: device pointer
* @fmt: printf() like format string.
+ *
+ * Like DRM_ERROR() but won't flood the log.
*/
#define DRM_DEV_ERROR_RATELIMITED(dev, fmt, ...) \
({ \
})
/**
- * Debug output.
+ * DRM_DEV_DEBUG() - Debug output for generic drm code
*
* @dev: device pointer
* @fmt: printf() like format string.
*/
#define DRM_DEV_DEBUG(dev, fmt, ...) \
drm_dev_dbg(dev, DRM_UT_CORE, fmt, ##__VA_ARGS__)
+/**
+ * DRM_DEV_DEBUG_DRIVER() - Debug output for vendor specific part of the driver
+ *
+ * @dev: device pointer
+ * @fmt: printf() like format string.
+ */
#define DRM_DEV_DEBUG_DRIVER(dev, fmt, ...) \
drm_dev_dbg(dev, DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
+/**
+ * DRM_DEV_DEBUG_KMS() - Debug output for modesetting code
+ *
+ * @dev: device pointer
+ * @fmt: printf() like format string.
+ */
#define DRM_DEV_DEBUG_KMS(dev, fmt, ...) \
drm_dev_dbg(dev, DRM_UT_KMS, fmt, ##__VA_ARGS__)
ARM_SMCCC_SMC_32, \
0, 0x7fff)
+#define SMCCC_ARCH_WORKAROUND_RET_UNAFFECTED 1
+
/* Paravirtualised time calls (defined by ARM DEN0057A) */
#define ARM_SMCCC_HV_PV_TIME_FEATURES \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
struct cpufreq_driver {
char name[CPUFREQ_NAME_LEN];
- u8 flags;
+ u16 flags;
void *driver_data;
/* needed by all drivers */
*/
#define CPUFREQ_IS_COOLING_DEV BIT(7)
+/*
+ * Set by drivers that need to update internale upper and lower boundaries along
+ * with the target frequency and so the core and governors should also invoke
+ * the diver if the target frequency does not change, but the policy min or max
+ * may have changed.
+ */
+#define CPUFREQ_NEED_UPDATE_LIMITS BIT(8)
+
int cpufreq_register_driver(struct cpufreq_driver *driver_data);
int cpufreq_unregister_driver(struct cpufreq_driver *driver_data);
+bool cpufreq_driver_test_flags(u16 flags);
const char *cpufreq_get_current_driver(void);
void *cpufreq_get_driver_data(void);
struct dentry *parent,
struct debugfs_u32_array *array);
-struct dentry *debugfs_create_devm_seqfile(struct device *dev, const char *name,
- struct dentry *parent,
- int (*read_fn)(struct seq_file *s,
- void *data));
+void debugfs_create_devm_seqfile(struct device *dev, const char *name,
+ struct dentry *parent,
+ int (*read_fn)(struct seq_file *s, void *data));
bool debugfs_initialized(void);
{
}
-static inline struct dentry *debugfs_create_devm_seqfile(struct device *dev,
- const char *name,
- struct dentry *parent,
- int (*read_fn)(struct seq_file *s,
- void *data))
+static inline void debugfs_create_devm_seqfile(struct device *dev,
+ const char *name,
+ struct dentry *parent,
+ int (*read_fn)(struct seq_file *s,
+ void *data))
{
- return ERR_PTR(-ENODEV);
}
static inline ssize_t debugfs_read_file_bool(struct file *file,
u32 buf_info1;
u32 org_buf_len;
u64 org_buf_ptr;
- u32 epib[0];
+ u32 epib[];
} __packed;
#define CPPI5_DESC_MIN_ALIGN (16U)
*/
struct cppi5_monolithic_desc_t {
struct cppi5_desc_hdr_t hdr;
- u32 epib[0];
+ u32 epib[];
};
#define CPPI5_INFO2_MDESC_DATA_OFFSET_SHIFT (18U)
*/
struct simple_transaction_argresp {
ssize_t size;
- char data[0];
+ char data[];
};
#define SIMPLE_TRANSACTION_LIMIT (PAGE_SIZE - sizeof(struct simple_transaction_argresp))
/* 0x0050 */
__u8 s_checksum_type; /* checksum type */
__u8 s_padding2[3];
- __u32 s_padding[42];
+/* 0x0054 */
+ __be32 s_num_fc_blks; /* Number of fast commit blocks */
+/* 0x0058 */
+ __u32 s_padding[41];
__be32 s_checksum; /* crc32c(superblock) */
/* 0x0100 */
*/
void (*j_fc_cleanup_callback)(struct journal_s *journal, int);
- /*
+ /**
* @j_fc_replay_callback:
*
* File-system specific function that performs replay of a fast
case 2: a += (u32)k[1]<<8; fallthrough;
case 1: a += k[0];
__jhash_final(a, b, c);
+ break;
case 0: /* Nothing left to add */
break;
}
case 2: b += k[1]; fallthrough;
case 1: a += k[0];
__jhash_final(a, b, c);
+ break;
case 0: /* Nothing left to add */
break;
}
*/
struct zynqmp_ipi_message {
size_t len;
- u8 data[0];
+ u8 data[];
};
#endif /* _LINUX_ZYNQMP_IPI_MESSAGE_H_ */
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel MIC Bus driver.
- *
- * This implementation is very similar to the virtio bus driver
- * implementation @ include/linux/virtio.h.
- */
-#ifndef _MIC_BUS_H_
-#define _MIC_BUS_H_
-/*
- * Everything a mbus driver needs to work with any particular mbus
- * implementation.
- */
-#include <linux/interrupt.h>
-#include <linux/dma-mapping.h>
-
-struct mbus_device_id {
- __u32 device;
- __u32 vendor;
-};
-
-#define MBUS_DEV_DMA_HOST 2
-#define MBUS_DEV_DMA_MIC 3
-#define MBUS_DEV_ANY_ID 0xffffffff
-
-/**
- * mbus_device - representation of a device using mbus
- * @mmio_va: virtual address of mmio space
- * @hw_ops: the hardware ops supported by this device.
- * @id: the device type identification (used to match it with a driver).
- * @dev: underlying device.
- * be used to communicate with.
- * @index: unique position on the mbus bus
- */
-struct mbus_device {
- void __iomem *mmio_va;
- struct mbus_hw_ops *hw_ops;
- struct mbus_device_id id;
- struct device dev;
- int index;
-};
-
-/**
- * mbus_driver - operations for a mbus I/O driver
- * @driver: underlying device driver (populate name and owner).
- * @id_table: the ids serviced by this driver.
- * @probe: the function to call when a device is found. Returns 0 or -errno.
- * @remove: the function to call when a device is removed.
- */
-struct mbus_driver {
- struct device_driver driver;
- const struct mbus_device_id *id_table;
- int (*probe)(struct mbus_device *dev);
- void (*scan)(struct mbus_device *dev);
- void (*remove)(struct mbus_device *dev);
-};
-
-/**
- * struct mic_irq - opaque pointer used as cookie
- */
-struct mic_irq;
-
-/**
- * mbus_hw_ops - Hardware operations for accessing a MIC device on the MIC bus.
- */
-struct mbus_hw_ops {
- struct mic_irq* (*request_threaded_irq)(struct mbus_device *mbdev,
- irq_handler_t handler,
- irq_handler_t thread_fn,
- const char *name, void *data,
- int intr_src);
- void (*free_irq)(struct mbus_device *mbdev,
- struct mic_irq *cookie, void *data);
- void (*ack_interrupt)(struct mbus_device *mbdev, int num);
-};
-
-struct mbus_device *
-mbus_register_device(struct device *pdev, int id, const struct dma_map_ops *dma_ops,
- struct mbus_hw_ops *hw_ops, int index,
- void __iomem *mmio_va);
-void mbus_unregister_device(struct mbus_device *mbdev);
-
-int mbus_register_driver(struct mbus_driver *drv);
-void mbus_unregister_driver(struct mbus_driver *drv);
-
-static inline struct mbus_device *dev_to_mbus(struct device *_dev)
-{
- return container_of(_dev, struct mbus_device, dev);
-}
-
-static inline struct mbus_driver *drv_to_mbus(struct device_driver *drv)
-{
- return container_of(drv, struct mbus_driver, driver);
-}
-
-#endif /* _MIC_BUS_H */
return val.vbool;
}
+/**
+ * mlx5_core_net - Provide net namespace of the mlx5_core_dev
+ * @dev: mlx5 core device
+ *
+ * mlx5_core_net() returns the net namespace of mlx5 core device.
+ * This can be called only in below described limited context.
+ * (a) When a devlink instance for mlx5_core is registered and
+ * when devlink reload operation is disabled.
+ * or
+ * (b) during devlink reload reload_down() and reload_up callbacks
+ * where it is ensured that devlink instance's net namespace is
+ * stable.
+ */
+static inline struct net *mlx5_core_net(struct mlx5_core_dev *dev)
+{
+ return devlink_net(priv_to_devlink(dev));
+}
+
#endif /* MLX5_DRIVER_H */
u8 reserved_at_68[0x10];
u8 num_of_actions[0x8];
- union mlx5_ifc_set_add_copy_action_in_auto_bits actions[0];
+ union mlx5_ifc_set_add_copy_action_in_auto_bits actions[];
};
struct mlx5_ifc_dealloc_modify_header_context_out_bits {
u8 reserved_at_60[0x20];
- u8 data[0][0x20];
+ u8 data[][0x20];
};
enum {
return VM_FAULT_NOPAGE;
}
+#ifndef io_remap_pfn_range
+static inline int io_remap_pfn_range(struct vm_area_struct *vma,
+ unsigned long addr, unsigned long pfn,
+ unsigned long size, pgprot_t prot)
+{
+ return remap_pfn_range(vma, addr, pfn, size, pgprot_decrypted(prot));
+}
+#endif
+
static inline vm_fault_t vmf_error(int err)
{
if (err == -ENOMEM)
}
/* Get/put a kernel symbol (calls should be symmetric) */
-#define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
+#define symbol_get(x) ({ extern typeof(x) x __attribute__((weak,visibility("hidden"))); &(x); })
#define symbol_put(x) do { } while (0)
#define symbol_put_addr(x) do { } while (0)
#endif /* !__ASSEMBLY__ */
-#ifndef io_remap_pfn_range
-#define io_remap_pfn_range remap_pfn_range
-#endif
-
#ifndef has_transparent_hugepage
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
#define has_transparent_hugepage() 1
uint16_t num_banks_total;
/* Number of banks described in banks array. */
uint16_t num_banks_desc;
- struct ec_flash_bank banks[0];
+ struct ec_flash_bank banks[];
} __ec_align4;
/*
/* Total amount of vector lost */
uint16_t total_lost;
/* Lost events since the last fifo_info, per sensors */
- uint16_t lost[0];
+ uint16_t lost[];
} __ec_todo_packed;
struct ec_response_motion_sense_fifo_data {
uint32_t number_data;
- struct ec_response_motion_sensor_data data[0];
+ struct ec_response_motion_sensor_data data[];
} __ec_todo_packed;
/* List supported activity recognition */
uint8_t algorithm;
uint8_t num_params;
uint8_t reserved[2];
- float val[0];
+ float val[];
} __ec_align4;
struct ec_params_tmp006_set_calibration_v1 {
uint8_t algorithm;
uint8_t num_params;
uint8_t reserved;
- float val[0];
+ float val[];
} __ec_align4;
uint8_t type; /* event type : see PD_EVENT_xx below */
uint8_t size_port; /* [7:5] port number [4:0] payload size in bytes */
uint16_t data; /* type-defined data payload */
- uint8_t payload[0]; /* optional additional data payload: 0..16 bytes */
+ uint8_t payload[]; /* optional additional data payload: 0..16 bytes */
} __ec_align4;
/* The timestamp is the microsecond counter shifted to get about a ms. */
struct ec_response_tp_frame_info {
uint32_t n_frames;
- uint32_t frame_sizes[0];
+ uint32_t frame_sizes[];
} __ec_align4;
/* Create a snapshot of current frame readings */
uint32_t outsize;
uint32_t insize;
uint32_t result;
- uint8_t data[0];
+ uint8_t data[];
};
/**
+++ /dev/null
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * This file is provided under a dual BSD/GPLv2 license. When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * BSD LICENSE
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Intel SCIF driver.
- *
- */
-#ifndef __SCIF_H__
-#define __SCIF_H__
-
-#include <linux/types.h>
-#include <linux/poll.h>
-#include <linux/device.h>
-#include <linux/scif_ioctl.h>
-
-#define SCIF_ACCEPT_SYNC 1
-#define SCIF_SEND_BLOCK 1
-#define SCIF_RECV_BLOCK 1
-
-enum {
- SCIF_PROT_READ = (1 << 0),
- SCIF_PROT_WRITE = (1 << 1)
-};
-
-enum {
- SCIF_MAP_FIXED = 0x10,
- SCIF_MAP_KERNEL = 0x20,
-};
-
-enum {
- SCIF_FENCE_INIT_SELF = (1 << 0),
- SCIF_FENCE_INIT_PEER = (1 << 1),
- SCIF_SIGNAL_LOCAL = (1 << 4),
- SCIF_SIGNAL_REMOTE = (1 << 5)
-};
-
-enum {
- SCIF_RMA_USECPU = (1 << 0),
- SCIF_RMA_USECACHE = (1 << 1),
- SCIF_RMA_SYNC = (1 << 2),
- SCIF_RMA_ORDERED = (1 << 3)
-};
-
-/* End of SCIF Admin Reserved Ports */
-#define SCIF_ADMIN_PORT_END 1024
-
-/* End of SCIF Reserved Ports */
-#define SCIF_PORT_RSVD 1088
-
-typedef struct scif_endpt *scif_epd_t;
-typedef struct scif_pinned_pages *scif_pinned_pages_t;
-
-/**
- * struct scif_range - SCIF registered range used in kernel mode
- * @cookie: cookie used internally by SCIF
- * @nr_pages: number of pages of PAGE_SIZE
- * @prot_flags: R/W protection
- * @phys_addr: Array of bus addresses
- * @va: Array of kernel virtual addresses backed by the pages in the phys_addr
- * array. The va is populated only when called on the host for a remote
- * SCIF connection on MIC. This is required to support the use case of DMA
- * between MIC and another device which is not a SCIF node e.g., an IB or
- * ethernet NIC.
- */
-struct scif_range {
- void *cookie;
- int nr_pages;
- int prot_flags;
- dma_addr_t *phys_addr;
- void __iomem **va;
-};
-
-/**
- * struct scif_pollepd - SCIF endpoint to be monitored via scif_poll
- * @epd: SCIF endpoint
- * @events: requested events
- * @revents: returned events
- */
-struct scif_pollepd {
- scif_epd_t epd;
- __poll_t events;
- __poll_t revents;
-};
-
-/**
- * scif_peer_dev - representation of a peer SCIF device
- *
- * Peer devices show up as PCIe devices for the mgmt node but not the cards.
- * The mgmt node discovers all the cards on the PCIe bus and informs the other
- * cards about their peers. Upon notification of a peer a node adds a peer
- * device to the peer bus to maintain symmetry in the way devices are
- * discovered across all nodes in the SCIF network.
- *
- * @dev: underlying device
- * @dnode - The destination node which this device will communicate with.
- */
-struct scif_peer_dev {
- struct device dev;
- u8 dnode;
-};
-
-/**
- * scif_client - representation of a SCIF client
- * @name: client name
- * @probe - client method called when a peer device is registered
- * @remove - client method called when a peer device is unregistered
- * @si - subsys_interface used internally for implementing SCIF clients
- */
-struct scif_client {
- const char *name;
- void (*probe)(struct scif_peer_dev *spdev);
- void (*remove)(struct scif_peer_dev *spdev);
- struct subsys_interface si;
-};
-
-#define SCIF_OPEN_FAILED ((scif_epd_t)-1)
-#define SCIF_REGISTER_FAILED ((off_t)-1)
-#define SCIF_MMAP_FAILED ((void *)-1)
-
-/**
- * scif_open() - Create an endpoint
- *
- * Return:
- * Upon successful completion, scif_open() returns an endpoint descriptor to
- * be used in subsequent SCIF functions calls to refer to that endpoint;
- * otherwise in user mode SCIF_OPEN_FAILED (that is ((scif_epd_t)-1)) is
- * returned and errno is set to indicate the error; in kernel mode a NULL
- * scif_epd_t is returned.
- *
- * Errors:
- * ENOMEM - Insufficient kernel memory was available
- */
-scif_epd_t scif_open(void);
-
-/**
- * scif_bind() - Bind an endpoint to a port
- * @epd: endpoint descriptor
- * @pn: port number
- *
- * scif_bind() binds endpoint epd to port pn, where pn is a port number on the
- * local node. If pn is zero, a port number greater than or equal to
- * SCIF_PORT_RSVD is assigned and returned. Each endpoint may be bound to
- * exactly one local port. Ports less than 1024 when requested can only be bound
- * by system (or root) processes or by processes executed by privileged users.
- *
- * Return:
- * Upon successful completion, scif_bind() returns the port number to which epd
- * is bound; otherwise in user mode -1 is returned and errno is set to
- * indicate the error; in kernel mode the negative of one of the following
- * errors is returned.
- *
- * Errors:
- * EBADF, ENOTTY - epd is not a valid endpoint descriptor
- * EINVAL - the endpoint or the port is already bound
- * EISCONN - The endpoint is already connected
- * ENOSPC - No port number available for assignment
- * EACCES - The port requested is protected and the user is not the superuser
- */
-int scif_bind(scif_epd_t epd, u16 pn);
-
-/**
- * scif_listen() - Listen for connections on an endpoint
- * @epd: endpoint descriptor
- * @backlog: maximum pending connection requests
- *
- * scif_listen() marks the endpoint epd as a listening endpoint - that is, as
- * an endpoint that will be used to accept incoming connection requests. Once
- * so marked, the endpoint is said to be in the listening state and may not be
- * used as the endpoint of a connection.
- *
- * The endpoint, epd, must have been bound to a port.
- *
- * The backlog argument defines the maximum length to which the queue of
- * pending connections for epd may grow. If a connection request arrives when
- * the queue is full, the client may receive an error with an indication that
- * the connection was refused.
- *
- * Return:
- * Upon successful completion, scif_listen() returns 0; otherwise in user mode
- * -1 is returned and errno is set to indicate the error; in kernel mode the
- * negative of one of the following errors is returned.
- *
- * Errors:
- * EBADF, ENOTTY - epd is not a valid endpoint descriptor
- * EINVAL - the endpoint is not bound to a port
- * EISCONN - The endpoint is already connected or listening
- */
-int scif_listen(scif_epd_t epd, int backlog);
-
-/**
- * scif_connect() - Initiate a connection on a port
- * @epd: endpoint descriptor
- * @dst: global id of port to which to connect
- *
- * The scif_connect() function requests the connection of endpoint epd to remote
- * port dst. If the connection is successful, a peer endpoint, bound to dst, is
- * created on node dst.node. On successful return, the connection is complete.
- *
- * If the endpoint epd has not already been bound to a port, scif_connect()
- * will bind it to an unused local port.
- *
- * A connection is terminated when an endpoint of the connection is closed,
- * either explicitly by scif_close(), or when a process that owns one of the
- * endpoints of the connection is terminated.
- *
- * In user space, scif_connect() supports an asynchronous connection mode
- * if the application has set the O_NONBLOCK flag on the endpoint via the
- * fcntl() system call. Setting this flag will result in the calling process
- * not to wait during scif_connect().
- *
- * Return:
- * Upon successful completion, scif_connect() returns the port ID to which the
- * endpoint, epd, is bound; otherwise in user mode -1 is returned and errno is
- * set to indicate the error; in kernel mode the negative of one of the
- * following errors is returned.
- *
- * Errors:
- * EBADF, ENOTTY - epd is not a valid endpoint descriptor
- * ECONNREFUSED - The destination was not listening for connections or refused
- * the connection request
- * EINVAL - dst.port is not a valid port ID
- * EISCONN - The endpoint is already connected
- * ENOMEM - No buffer space is available
- * ENODEV - The destination node does not exist, or the node is lost or existed,
- * but is not currently in the network since it may have crashed
- * ENOSPC - No port number available for assignment
- * EOPNOTSUPP - The endpoint is listening and cannot be connected
- */
-int scif_connect(scif_epd_t epd, struct scif_port_id *dst);
-
-/**
- * scif_accept() - Accept a connection on an endpoint
- * @epd: endpoint descriptor
- * @peer: global id of port to which connected
- * @newepd: new connected endpoint descriptor
- * @flags: flags
- *
- * The scif_accept() call extracts the first connection request from the queue
- * of pending connections for the port on which epd is listening. scif_accept()
- * creates a new endpoint, bound to the same port as epd, and allocates a new
- * SCIF endpoint descriptor, returned in newepd, for the endpoint. The new
- * endpoint is connected to the endpoint through which the connection was
- * requested. epd is unaffected by this call, and remains in the listening
- * state.
- *
- * On successful return, peer holds the global port identifier (node id and
- * local port number) of the port which requested the connection.
- *
- * A connection is terminated when an endpoint of the connection is closed,
- * either explicitly by scif_close(), or when a process that owns one of the
- * endpoints of the connection is terminated.
- *
- * The number of connections that can (subsequently) be accepted on epd is only
- * limited by system resources (memory).
- *
- * The flags argument is formed by OR'ing together zero or more of the
- * following values.
- * SCIF_ACCEPT_SYNC - block until a connection request is presented. If
- * SCIF_ACCEPT_SYNC is not in flags, and no pending
- * connections are present on the queue, scif_accept()
- * fails with an EAGAIN error
- *
- * In user mode, the select() and poll() functions can be used to determine
- * when there is a connection request. In kernel mode, the scif_poll()
- * function may be used for this purpose. A readable event will be delivered
- * when a connection is requested.
- *
- * Return:
- * Upon successful completion, scif_accept() returns 0; otherwise in user mode
- * -1 is returned and errno is set to indicate the error; in kernel mode the
- * negative of one of the following errors is returned.
- *
- * Errors:
- * EAGAIN - SCIF_ACCEPT_SYNC is not set and no connections are present to be
- * accepted or SCIF_ACCEPT_SYNC is not set and remote node failed to complete
- * its connection request
- * EBADF, ENOTTY - epd is not a valid endpoint descriptor
- * EINTR - Interrupted function
- * EINVAL - epd is not a listening endpoint, or flags is invalid, or peer is
- * NULL, or newepd is NULL
- * ENODEV - The requesting node is lost or existed, but is not currently in the
- * network since it may have crashed
- * ENOMEM - Not enough space
- * ENOENT - Secondary part of epd registration failed
- */
-int scif_accept(scif_epd_t epd, struct scif_port_id *peer, scif_epd_t
- *newepd, int flags);
-
-/**
- * scif_close() - Close an endpoint
- * @epd: endpoint descriptor
- *
- * scif_close() closes an endpoint and performs necessary teardown of
- * facilities associated with that endpoint.
- *
- * If epd is a listening endpoint then it will no longer accept connection
- * requests on the port to which it is bound. Any pending connection requests
- * are rejected.
- *
- * If epd is a connected endpoint, then its peer endpoint is also closed. RMAs
- * which are in-process through epd or its peer endpoint will complete before
- * scif_close() returns. Registered windows of the local and peer endpoints are
- * released as if scif_unregister() was called against each window.
- *
- * Closing a SCIF endpoint does not affect local registered memory mapped by
- * a SCIF endpoint on a remote node. The local memory remains mapped by the peer
- * SCIF endpoint explicitly removed by calling munmap(..) by the peer.
- *
- * If the peer endpoint's receive queue is not empty at the time that epd is
- * closed, then the peer endpoint can be passed as the endpoint parameter to
- * scif_recv() until the receive queue is empty.
- *
- * epd is freed and may no longer be accessed.
- *
- * Return:
- * Upon successful completion, scif_close() returns 0; otherwise in user mode
- * -1 is returned and errno is set to indicate the error; in kernel mode the
- * negative of one of the following errors is returned.
- *
- * Errors:
- * EBADF, ENOTTY - epd is not a valid endpoint descriptor
- */
-int scif_close(scif_epd_t epd);
-
-/**
- * scif_send() - Send a message
- * @epd: endpoint descriptor
- * @msg: message buffer address
- * @len: message length
- * @flags: blocking mode flags
- *
- * scif_send() sends data to the peer of endpoint epd. Up to len bytes of data
- * are copied from memory starting at address msg. On successful execution the
- * return value of scif_send() is the number of bytes that were sent, and is
- * zero if no bytes were sent because len was zero. scif_send() may be called
- * only when the endpoint is in a connected state.
- *
- * If a scif_send() call is non-blocking, then it sends only those bytes which
- * can be sent without waiting, up to a maximum of len bytes.
- *
- * If a scif_send() call is blocking, then it normally returns after sending
- * all len bytes. If a blocking call is interrupted or the connection is
- * reset, the call is considered successful if some bytes were sent or len is
- * zero, otherwise the call is considered unsuccessful.
- *
- * In user mode, the select() and poll() functions can be used to determine
- * when the send queue is not full. In kernel mode, the scif_poll() function
- * may be used for this purpose.
- *
- * It is recommended that scif_send()/scif_recv() only be used for short
- * control-type message communication between SCIF endpoints. The SCIF RMA
- * APIs are expected to provide better performance for transfer sizes of
- * 1024 bytes or longer for the current MIC hardware and software
- * implementation.
- *
- * scif_send() will block until the entire message is sent if SCIF_SEND_BLOCK
- * is passed as the flags argument.
- *
- * Return:
- * Upon successful completion, scif_send() returns the number of bytes sent;
- * otherwise in user mode -1 is returned and errno is set to indicate the
- * error; in kernel mode the negative of one of the following errors is
- * returned.
- *
- * Errors:
- * EBADF, ENOTTY - epd is not a valid endpoint descriptor
- * ECONNRESET - Connection reset by peer
- * EINVAL - flags is invalid, or len is negative
- * ENODEV - The remote node is lost or existed, but is not currently in the
- * network since it may have crashed
- * ENOMEM - Not enough space
- * ENOTCONN - The endpoint is not connected
- */
-int scif_send(scif_epd_t epd, void *msg, int len, int flags);
-
-/**
- * scif_recv() - Receive a message
- * @epd: endpoint descriptor
- * @msg: message buffer address
- * @len: message buffer length
- * @flags: blocking mode flags
- *
- * scif_recv() receives data from the peer of endpoint epd. Up to len bytes of
- * data are copied to memory starting at address msg. On successful execution
- * the return value of scif_recv() is the number of bytes that were received,
- * and is zero if no bytes were received because len was zero. scif_recv() may
- * be called only when the endpoint is in a connected state.
- *
- * If a scif_recv() call is non-blocking, then it receives only those bytes
- * which can be received without waiting, up to a maximum of len bytes.
- *
- * If a scif_recv() call is blocking, then it normally returns after receiving
- * all len bytes. If the blocking call was interrupted due to a disconnection,
- * subsequent calls to scif_recv() will copy all bytes received upto the point
- * of disconnection.
- *
- * In user mode, the select() and poll() functions can be used to determine
- * when data is available to be received. In kernel mode, the scif_poll()
- * function may be used for this purpose.
- *
- * It is recommended that scif_send()/scif_recv() only be used for short
- * control-type message communication between SCIF endpoints. The SCIF RMA
- * APIs are expected to provide better performance for transfer sizes of
- * 1024 bytes or longer for the current MIC hardware and software
- * implementation.
- *
- * scif_recv() will block until the entire message is received if
- * SCIF_RECV_BLOCK is passed as the flags argument.
- *
- * Return:
- * Upon successful completion, scif_recv() returns the number of bytes
- * received; otherwise in user mode -1 is returned and errno is set to
- * indicate the error; in kernel mode the negative of one of the following
- * errors is returned.
- *
- * Errors:
- * EAGAIN - The destination node is returning from a low power state
- * EBADF, ENOTTY - epd is not a valid endpoint descriptor
- * ECONNRESET - Connection reset by peer
- * EINVAL - flags is invalid, or len is negative
- * ENODEV - The remote node is lost or existed, but is not currently in the
- * network since it may have crashed
- * ENOMEM - Not enough space
- * ENOTCONN - The endpoint is not connected
- */
-int scif_recv(scif_epd_t epd, void *msg, int len, int flags);
-
-/**
- * scif_register() - Mark a memory region for remote access.
- * @epd: endpoint descriptor
- * @addr: starting virtual address
- * @len: length of range
- * @offset: offset of window
- * @prot_flags: read/write protection flags
- * @map_flags: mapping flags
- *
- * The scif_register() function opens a window, a range of whole pages of the
- * registered address space of the endpoint epd, starting at offset po and
- * continuing for len bytes. The value of po, further described below, is a
- * function of the parameters offset and len, and the value of map_flags. Each
- * page of the window represents the physical memory page which backs the
- * corresponding page of the range of virtual address pages starting at addr
- * and continuing for len bytes. addr and len are constrained to be multiples
- * of the page size. A successful scif_register() call returns po.
- *
- * When SCIF_MAP_FIXED is set in the map_flags argument, po will be offset
- * exactly, and offset is constrained to be a multiple of the page size. The
- * mapping established by scif_register() will not replace any existing
- * registration; an error is returned if any page within the range [offset,
- * offset + len - 1] intersects an existing window.
- *
- * When SCIF_MAP_FIXED is not set, the implementation uses offset in an
- * implementation-defined manner to arrive at po. The po value so chosen will
- * be an area of the registered address space that the implementation deems
- * suitable for a mapping of len bytes. An offset value of 0 is interpreted as
- * granting the implementation complete freedom in selecting po, subject to
- * constraints described below. A non-zero value of offset is taken to be a
- * suggestion of an offset near which the mapping should be placed. When the
- * implementation selects a value for po, it does not replace any extant
- * window. In all cases, po will be a multiple of the page size.
- *
- * The physical pages which are so represented by a window are available for
- * access in calls to mmap(), scif_readfrom(), scif_writeto(),
- * scif_vreadfrom(), and scif_vwriteto(). While a window is registered, the
- * physical pages represented by the window will not be reused by the memory
- * subsystem for any other purpose. Note that the same physical page may be
- * represented by multiple windows.
- *
- * Subsequent operations which change the memory pages to which virtual
- * addresses are mapped (such as mmap(), munmap()) have no effect on
- * existing window.
- *
- * If the process will fork(), it is recommended that the registered
- * virtual address range be marked with MADV_DONTFORK. Doing so will prevent
- * problems due to copy-on-write semantics.
- *
- * The prot_flags argument is formed by OR'ing together one or more of the
- * following values.
- * SCIF_PROT_READ - allow read operations from the window
- * SCIF_PROT_WRITE - allow write operations to the window
- *
- * Return:
- * Upon successful completion, scif_register() returns the offset at which the
- * mapping was placed (po); otherwise in user mode SCIF_REGISTER_FAILED (that
- * is (off_t *)-1) is returned and errno is set to indicate the error; in
- * kernel mode the negative of one of the following errors is returned.
- *
- * Errors:
- * EADDRINUSE - SCIF_MAP_FIXED is set in map_flags, and pages in the range
- * [offset, offset + len -1] are already registered
- * EAGAIN - The mapping could not be performed due to lack of resources
- * EBADF, ENOTTY - epd is not a valid endpoint descriptor
- * ECONNRESET - Connection reset by peer
- * EINVAL - map_flags is invalid, or prot_flags is invalid, or SCIF_MAP_FIXED is
- * set in flags, and offset is not a multiple of the page size, or addr is not a
- * multiple of the page size, or len is not a multiple of the page size, or is
- * 0, or offset is negative
- * ENODEV - The remote node is lost or existed, but is not currently in the
- * network since it may have crashed
- * ENOMEM - Not enough space
- * ENOTCONN -The endpoint is not connected
- */
-off_t scif_register(scif_epd_t epd, void *addr, size_t len, off_t offset,
- int prot_flags, int map_flags);
-
-/**
- * scif_unregister() - Mark a memory region for remote access.
- * @epd: endpoint descriptor
- * @offset: start of range to unregister
- * @len: length of range to unregister
- *
- * The scif_unregister() function closes those previously registered windows
- * which are entirely within the range [offset, offset + len - 1]. It is an
- * error to specify a range which intersects only a subrange of a window.
- *
- * On a successful return, pages within the window may no longer be specified
- * in calls to mmap(), scif_readfrom(), scif_writeto(), scif_vreadfrom(),
- * scif_vwriteto(), scif_get_pages, and scif_fence_signal(). The window,
- * however, continues to exist until all previous references against it are
- * removed. A window is referenced if there is a mapping to it created by
- * mmap(), or if scif_get_pages() was called against the window
- * (and the pages have not been returned via scif_put_pages()). A window is
- * also referenced while an RMA, in which some range of the window is a source
- * or destination, is in progress. Finally a window is referenced while some
- * offset in that window was specified to scif_fence_signal(), and the RMAs
- * marked by that call to scif_fence_signal() have not completed. While a
- * window is in this state, its registered address space pages are not
- * available for use in a new registered window.
- *
- * When all such references to the window have been removed, its references to
- * all the physical pages which it represents are removed. Similarly, the
- * registered address space pages of the window become available for
- * registration in a new window.
- *
- * Return:
- * Upon successful completion, scif_unregister() returns 0; otherwise in user
- * mode -1 is returned and errno is set to indicate the error; in kernel mode
- * the negative of one of the following errors is returned. In the event of an
- * error, no windows are unregistered.
- *
- * Errors:
- * EBADF, ENOTTY - epd is not a valid endpoint descriptor
- * ECONNRESET - Connection reset by peer
- * EINVAL - the range [offset, offset + len - 1] intersects a subrange of a
- * window, or offset is negative
- * ENODEV - The remote node is lost or existed, but is not currently in the
- * network since it may have crashed
- * ENOTCONN - The endpoint is not connected
- * ENXIO - Offsets in the range [offset, offset + len - 1] are invalid for the
- * registered address space of epd
- */
-int scif_unregister(scif_epd_t epd, off_t offset, size_t len);
-
-/**
- * scif_readfrom() - Copy from a remote address space
- * @epd: endpoint descriptor
- * @loffset: offset in local registered address space to
- * which to copy
- * @len: length of range to copy
- * @roffset: offset in remote registered address space
- * from which to copy
- * @rma_flags: transfer mode flags
- *
- * scif_readfrom() copies len bytes from the remote registered address space of
- * the peer of endpoint epd, starting at the offset roffset to the local
- * registered address space of epd, starting at the offset loffset.
- *
- * Each of the specified ranges [loffset, loffset + len - 1] and [roffset,
- * roffset + len - 1] must be within some registered window or windows of the
- * local and remote nodes. A range may intersect multiple registered windows,
- * but only if those windows are contiguous in the registered address space.
- *
- * If rma_flags includes SCIF_RMA_USECPU, then the data is copied using
- * programmed read/writes. Otherwise the data is copied using DMA. If rma_-
- * flags includes SCIF_RMA_SYNC, then scif_readfrom() will return after the
- * transfer is complete. Otherwise, the transfer may be performed asynchron-
- * ously. The order in which any two asynchronous RMA operations complete
- * is non-deterministic. The synchronization functions, scif_fence_mark()/
- * scif_fence_wait() and scif_fence_signal(), can be used to synchronize to
- * the completion of asynchronous RMA operations on the same endpoint.
- *
- * The DMA transfer of individual bytes is not guaranteed to complete in
- * address order. If rma_flags includes SCIF_RMA_ORDERED, then the last
- * cacheline or partial cacheline of the source range will become visible on
- * the destination node after all other transferred data in the source
- * range has become visible on the destination node.
- *
- * The optimal DMA performance will likely be realized if both
- * loffset and roffset are cacheline aligned (are a multiple of 64). Lower
- * performance will likely be realized if loffset and roffset are not
- * cacheline aligned but are separated by some multiple of 64. The lowest level
- * of performance is likely if loffset and roffset are not separated by a
- * multiple of 64.
- *
- * The rma_flags argument is formed by ORing together zero or more of the
- * following values.
- * SCIF_RMA_USECPU - perform the transfer using the CPU, otherwise use the DMA
- * engine.
- * SCIF_RMA_SYNC - perform the transfer synchronously, returning after the
- * transfer has completed. Passing this flag results in the
- * current implementation busy waiting and consuming CPU cycles
- * while the DMA transfer is in progress for best performance by
- * avoiding the interrupt latency.
- * SCIF_RMA_ORDERED - ensure that the last cacheline or partial cacheline of
- * the source range becomes visible on the destination node
- * after all other transferred data in the source range has
- * become visible on the destination
- *
- * Return:
- * Upon successful completion, scif_readfrom() returns 0; otherwise in user
- * mode -1 is returned and errno is set to indicate the error; in kernel mode
- * the negative of one of the following errors is returned.
- *
- * Errors:
- * EACCES - Attempt to write to a read-only range
- * EBADF, ENOTTY - epd is not a valid endpoint descriptor
- * ECONNRESET - Connection reset by peer
- * EINVAL - rma_flags is invalid
- * ENODEV - The remote node is lost or existed, but is not currently in the
- * network since it may have crashed
- * ENOTCONN - The endpoint is not connected
- * ENXIO - The range [loffset, loffset + len - 1] is invalid for the registered
- * address space of epd, or, The range [roffset, roffset + len - 1] is invalid
- * for the registered address space of the peer of epd, or loffset or roffset
- * is negative
- */
-int scif_readfrom(scif_epd_t epd, off_t loffset, size_t len, off_t
- roffset, int rma_flags);
-
-/**
- * scif_writeto() - Copy to a remote address space
- * @epd: endpoint descriptor
- * @loffset: offset in local registered address space
- * from which to copy
- * @len: length of range to copy
- * @roffset: offset in remote registered address space to
- * which to copy
- * @rma_flags: transfer mode flags
- *
- * scif_writeto() copies len bytes from the local registered address space of
- * epd, starting at the offset loffset to the remote registered address space
- * of the peer of endpoint epd, starting at the offset roffset.
- *
- * Each of the specified ranges [loffset, loffset + len - 1] and [roffset,
- * roffset + len - 1] must be within some registered window or windows of the
- * local and remote nodes. A range may intersect multiple registered windows,
- * but only if those windows are contiguous in the registered address space.
- *
- * If rma_flags includes SCIF_RMA_USECPU, then the data is copied using
- * programmed read/writes. Otherwise the data is copied using DMA. If rma_-
- * flags includes SCIF_RMA_SYNC, then scif_writeto() will return after the
- * transfer is complete. Otherwise, the transfer may be performed asynchron-
- * ously. The order in which any two asynchronous RMA operations complete
- * is non-deterministic. The synchronization functions, scif_fence_mark()/
- * scif_fence_wait() and scif_fence_signal(), can be used to synchronize to
- * the completion of asynchronous RMA operations on the same endpoint.
- *
- * The DMA transfer of individual bytes is not guaranteed to complete in
- * address order. If rma_flags includes SCIF_RMA_ORDERED, then the last
- * cacheline or partial cacheline of the source range will become visible on
- * the destination node after all other transferred data in the source
- * range has become visible on the destination node.
- *
- * The optimal DMA performance will likely be realized if both
- * loffset and roffset are cacheline aligned (are a multiple of 64). Lower
- * performance will likely be realized if loffset and roffset are not cacheline
- * aligned but are separated by some multiple of 64. The lowest level of
- * performance is likely if loffset and roffset are not separated by a multiple
- * of 64.
- *
- * The rma_flags argument is formed by ORing together zero or more of the
- * following values.
- * SCIF_RMA_USECPU - perform the transfer using the CPU, otherwise use the DMA
- * engine.
- * SCIF_RMA_SYNC - perform the transfer synchronously, returning after the
- * transfer has completed. Passing this flag results in the
- * current implementation busy waiting and consuming CPU cycles
- * while the DMA transfer is in progress for best performance by
- * avoiding the interrupt latency.
- * SCIF_RMA_ORDERED - ensure that the last cacheline or partial cacheline of
- * the source range becomes visible on the destination node
- * after all other transferred data in the source range has
- * become visible on the destination
- *
- * Return:
- * Upon successful completion, scif_readfrom() returns 0; otherwise in user
- * mode -1 is returned and errno is set to indicate the error; in kernel mode
- * the negative of one of the following errors is returned.
- *
- * Errors:
- * EACCES - Attempt to write to a read-only range
- * EBADF, ENOTTY - epd is not a valid endpoint descriptor
- * ECONNRESET - Connection reset by peer
- * EINVAL - rma_flags is invalid
- * ENODEV - The remote node is lost or existed, but is not currently in the
- * network since it may have crashed
- * ENOTCONN - The endpoint is not connected
- * ENXIO - The range [loffset, loffset + len - 1] is invalid for the registered
- * address space of epd, or, The range [roffset , roffset + len -1] is invalid
- * for the registered address space of the peer of epd, or loffset or roffset
- * is negative
- */
-int scif_writeto(scif_epd_t epd, off_t loffset, size_t len, off_t
- roffset, int rma_flags);
-
-/**
- * scif_vreadfrom() - Copy from a remote address space
- * @epd: endpoint descriptor
- * @addr: address to which to copy
- * @len: length of range to copy
- * @roffset: offset in remote registered address space
- * from which to copy
- * @rma_flags: transfer mode flags
- *
- * scif_vreadfrom() copies len bytes from the remote registered address
- * space of the peer of endpoint epd, starting at the offset roffset, to local
- * memory, starting at addr.
- *
- * The specified range [roffset, roffset + len - 1] must be within some
- * registered window or windows of the remote nodes. The range may
- * intersect multiple registered windows, but only if those windows are
- * contiguous in the registered address space.
- *
- * If rma_flags includes SCIF_RMA_USECPU, then the data is copied using
- * programmed read/writes. Otherwise the data is copied using DMA. If rma_-
- * flags includes SCIF_RMA_SYNC, then scif_vreadfrom() will return after the
- * transfer is complete. Otherwise, the transfer may be performed asynchron-
- * ously. The order in which any two asynchronous RMA operations complete
- * is non-deterministic. The synchronization functions, scif_fence_mark()/
- * scif_fence_wait() and scif_fence_signal(), can be used to synchronize to
- * the completion of asynchronous RMA operations on the same endpoint.
- *
- * The DMA transfer of individual bytes is not guaranteed to complete in
- * address order. If rma_flags includes SCIF_RMA_ORDERED, then the last
- * cacheline or partial cacheline of the source range will become visible on
- * the destination node after all other transferred data in the source
- * range has become visible on the destination node.
- *
- * If rma_flags includes SCIF_RMA_USECACHE, then the physical pages which back
- * the specified local memory range may be remain in a pinned state even after
- * the specified transfer completes. This may reduce overhead if some or all of
- * the same virtual address range is referenced in a subsequent call of
- * scif_vreadfrom() or scif_vwriteto().
- *
- * The optimal DMA performance will likely be realized if both
- * addr and roffset are cacheline aligned (are a multiple of 64). Lower
- * performance will likely be realized if addr and roffset are not
- * cacheline aligned but are separated by some multiple of 64. The lowest level
- * of performance is likely if addr and roffset are not separated by a
- * multiple of 64.
- *
- * The rma_flags argument is formed by ORing together zero or more of the
- * following values.
- * SCIF_RMA_USECPU - perform the transfer using the CPU, otherwise use the DMA
- * engine.
- * SCIF_RMA_USECACHE - enable registration caching
- * SCIF_RMA_SYNC - perform the transfer synchronously, returning after the
- * transfer has completed. Passing this flag results in the
- * current implementation busy waiting and consuming CPU cycles
- * while the DMA transfer is in progress for best performance by
- * avoiding the interrupt latency.
- * SCIF_RMA_ORDERED - ensure that the last cacheline or partial cacheline of
- * the source range becomes visible on the destination node
- * after all other transferred data in the source range has
- * become visible on the destination
- *
- * Return:
- * Upon successful completion, scif_vreadfrom() returns 0; otherwise in user
- * mode -1 is returned and errno is set to indicate the error; in kernel mode
- * the negative of one of the following errors is returned.
- *
- * Errors:
- * EACCES - Attempt to write to a read-only range
- * EBADF, ENOTTY - epd is not a valid endpoint descriptor
- * ECONNRESET - Connection reset by peer
- * EINVAL - rma_flags is invalid
- * ENODEV - The remote node is lost or existed, but is not currently in the
- * network since it may have crashed
- * ENOTCONN - The endpoint is not connected
- * ENXIO - Offsets in the range [roffset, roffset + len - 1] are invalid for the
- * registered address space of epd
- */
-int scif_vreadfrom(scif_epd_t epd, void *addr, size_t len, off_t roffset,
- int rma_flags);
-
-/**
- * scif_vwriteto() - Copy to a remote address space
- * @epd: endpoint descriptor
- * @addr: address from which to copy
- * @len: length of range to copy
- * @roffset: offset in remote registered address space to
- * which to copy
- * @rma_flags: transfer mode flags
- *
- * scif_vwriteto() copies len bytes from the local memory, starting at addr, to
- * the remote registered address space of the peer of endpoint epd, starting at
- * the offset roffset.
- *
- * The specified range [roffset, roffset + len - 1] must be within some
- * registered window or windows of the remote nodes. The range may intersect
- * multiple registered windows, but only if those windows are contiguous in the
- * registered address space.
- *
- * If rma_flags includes SCIF_RMA_USECPU, then the data is copied using
- * programmed read/writes. Otherwise the data is copied using DMA. If rma_-
- * flags includes SCIF_RMA_SYNC, then scif_vwriteto() will return after the
- * transfer is complete. Otherwise, the transfer may be performed asynchron-
- * ously. The order in which any two asynchronous RMA operations complete
- * is non-deterministic. The synchronization functions, scif_fence_mark()/
- * scif_fence_wait() and scif_fence_signal(), can be used to synchronize to
- * the completion of asynchronous RMA operations on the same endpoint.
- *
- * The DMA transfer of individual bytes is not guaranteed to complete in
- * address order. If rma_flags includes SCIF_RMA_ORDERED, then the last
- * cacheline or partial cacheline of the source range will become visible on
- * the destination node after all other transferred data in the source
- * range has become visible on the destination node.
- *
- * If rma_flags includes SCIF_RMA_USECACHE, then the physical pages which back
- * the specified local memory range may be remain in a pinned state even after
- * the specified transfer completes. This may reduce overhead if some or all of
- * the same virtual address range is referenced in a subsequent call of
- * scif_vreadfrom() or scif_vwriteto().
- *
- * The optimal DMA performance will likely be realized if both
- * addr and offset are cacheline aligned (are a multiple of 64). Lower
- * performance will likely be realized if addr and offset are not cacheline
- * aligned but are separated by some multiple of 64. The lowest level of
- * performance is likely if addr and offset are not separated by a multiple of
- * 64.
- *
- * The rma_flags argument is formed by ORing together zero or more of the
- * following values.
- * SCIF_RMA_USECPU - perform the transfer using the CPU, otherwise use the DMA
- * engine.
- * SCIF_RMA_USECACHE - allow registration caching
- * SCIF_RMA_SYNC - perform the transfer synchronously, returning after the
- * transfer has completed. Passing this flag results in the
- * current implementation busy waiting and consuming CPU cycles
- * while the DMA transfer is in progress for best performance by
- * avoiding the interrupt latency.
- * SCIF_RMA_ORDERED - ensure that the last cacheline or partial cacheline of
- * the source range becomes visible on the destination node
- * after all other transferred data in the source range has
- * become visible on the destination
- *
- * Return:
- * Upon successful completion, scif_vwriteto() returns 0; otherwise in user
- * mode -1 is returned and errno is set to indicate the error; in kernel mode
- * the negative of one of the following errors is returned.
- *
- * Errors:
- * EACCES - Attempt to write to a read-only range
- * EBADF, ENOTTY - epd is not a valid endpoint descriptor
- * ECONNRESET - Connection reset by peer
- * EINVAL - rma_flags is invalid
- * ENODEV - The remote node is lost or existed, but is not currently in the
- * network since it may have crashed
- * ENOTCONN - The endpoint is not connected
- * ENXIO - Offsets in the range [roffset, roffset + len - 1] are invalid for the
- * registered address space of epd
- */
-int scif_vwriteto(scif_epd_t epd, void *addr, size_t len, off_t roffset,
- int rma_flags);
-
-/**
- * scif_fence_mark() - Mark previously issued RMAs
- * @epd: endpoint descriptor
- * @flags: control flags
- * @mark: marked value returned as output.
- *
- * scif_fence_mark() returns after marking the current set of all uncompleted
- * RMAs initiated through the endpoint epd or the current set of all
- * uncompleted RMAs initiated through the peer of endpoint epd. The RMAs are
- * marked with a value returned at mark. The application may subsequently call
- * scif_fence_wait(), passing the value returned at mark, to await completion
- * of all RMAs so marked.
- *
- * The flags argument has exactly one of the following values.
- * SCIF_FENCE_INIT_SELF - RMA operations initiated through endpoint
- * epd are marked
- * SCIF_FENCE_INIT_PEER - RMA operations initiated through the peer
- * of endpoint epd are marked
- *
- * Return:
- * Upon successful completion, scif_fence_mark() returns 0; otherwise in user
- * mode -1 is returned and errno is set to indicate the error; in kernel mode
- * the negative of one of the following errors is returned.
- *
- * Errors:
- * EBADF, ENOTTY - epd is not a valid endpoint descriptor
- * ECONNRESET - Connection reset by peer
- * EINVAL - flags is invalid
- * ENODEV - The remote node is lost or existed, but is not currently in the
- * network since it may have crashed
- * ENOTCONN - The endpoint is not connected
- * ENOMEM - Insufficient kernel memory was available
- */
-int scif_fence_mark(scif_epd_t epd, int flags, int *mark);
-
-/**
- * scif_fence_wait() - Wait for completion of marked RMAs
- * @epd: endpoint descriptor
- * @mark: mark request
- *
- * scif_fence_wait() returns after all RMAs marked with mark have completed.
- * The value passed in mark must have been obtained in a previous call to
- * scif_fence_mark().
- *
- * Return:
- * Upon successful completion, scif_fence_wait() returns 0; otherwise in user
- * mode -1 is returned and errno is set to indicate the error; in kernel mode
- * the negative of one of the following errors is returned.
- *
- * Errors:
- * EBADF, ENOTTY - epd is not a valid endpoint descriptor
- * ECONNRESET - Connection reset by peer
- * ENODEV - The remote node is lost or existed, but is not currently in the
- * network since it may have crashed
- * ENOTCONN - The endpoint is not connected
- * ENOMEM - Insufficient kernel memory was available
- */
-int scif_fence_wait(scif_epd_t epd, int mark);
-
-/**
- * scif_fence_signal() - Request a memory update on completion of RMAs
- * @epd: endpoint descriptor
- * @loff: local offset
- * @lval: local value to write to loffset
- * @roff: remote offset
- * @rval: remote value to write to roffset
- * @flags: flags
- *
- * scif_fence_signal() returns after marking the current set of all uncompleted
- * RMAs initiated through the endpoint epd or marking the current set of all
- * uncompleted RMAs initiated through the peer of endpoint epd.
- *
- * If flags includes SCIF_SIGNAL_LOCAL, then on completion of the RMAs in the
- * marked set, lval is written to memory at the address corresponding to offset
- * loff in the local registered address space of epd. loff must be within a
- * registered window. If flags includes SCIF_SIGNAL_REMOTE, then on completion
- * of the RMAs in the marked set, rval is written to memory at the address
- * corresponding to offset roff in the remote registered address space of epd.
- * roff must be within a remote registered window of the peer of epd. Note
- * that any specified offset must be DWORD (4 byte / 32 bit) aligned.
- *
- * The flags argument is formed by OR'ing together the following.
- * Exactly one of the following values.
- * SCIF_FENCE_INIT_SELF - RMA operations initiated through endpoint
- * epd are marked
- * SCIF_FENCE_INIT_PEER - RMA operations initiated through the peer
- * of endpoint epd are marked
- * One or more of the following values.
- * SCIF_SIGNAL_LOCAL - On completion of the marked set of RMAs, write lval to
- * memory at the address corresponding to offset loff in the local
- * registered address space of epd.
- * SCIF_SIGNAL_REMOTE - On completion of the marked set of RMAs, write rval to
- * memory at the address corresponding to offset roff in the remote
- * registered address space of epd.
- *
- * Return:
- * Upon successful completion, scif_fence_signal() returns 0; otherwise in
- * user mode -1 is returned and errno is set to indicate the error; in kernel
- * mode the negative of one of the following errors is returned.
- *
- * Errors:
- * EBADF, ENOTTY - epd is not a valid endpoint descriptor
- * ECONNRESET - Connection reset by peer
- * EINVAL - flags is invalid, or loff or roff are not DWORD aligned
- * ENODEV - The remote node is lost or existed, but is not currently in the
- * network since it may have crashed
- * ENOTCONN - The endpoint is not connected
- * ENXIO - loff is invalid for the registered address of epd, or roff is invalid
- * for the registered address space, of the peer of epd
- */
-int scif_fence_signal(scif_epd_t epd, off_t loff, u64 lval, off_t roff,
- u64 rval, int flags);
-
-/**
- * scif_get_node_ids() - Return information about online nodes
- * @nodes: array in which to return online node IDs
- * @len: number of entries in the nodes array
- * @self: address to place the node ID of the local node
- *
- * scif_get_node_ids() fills in the nodes array with up to len node IDs of the
- * nodes in the SCIF network. If there is not enough space in nodes, as
- * indicated by the len parameter, only len node IDs are returned in nodes. The
- * return value of scif_get_node_ids() is the total number of nodes currently in
- * the SCIF network. By checking the return value against the len parameter,
- * the user may determine if enough space for nodes was allocated.
- *
- * The node ID of the local node is returned at self.
- *
- * Return:
- * Upon successful completion, scif_get_node_ids() returns the actual number of
- * online nodes in the SCIF network including 'self'; otherwise in user mode
- * -1 is returned and errno is set to indicate the error; in kernel mode no
- * errors are returned.
- */
-int scif_get_node_ids(u16 *nodes, int len, u16 *self);
-
-/**
- * scif_pin_pages() - Pin a set of pages
- * @addr: Virtual address of range to pin
- * @len: Length of range to pin
- * @prot_flags: Page protection flags
- * @map_flags: Page classification flags
- * @pinned_pages: Handle to pinned pages
- *
- * scif_pin_pages() pins (locks in physical memory) the physical pages which
- * back the range of virtual address pages starting at addr and continuing for
- * len bytes. addr and len are constrained to be multiples of the page size. A
- * successful scif_pin_pages() call returns a handle to pinned_pages which may
- * be used in subsequent calls to scif_register_pinned_pages().
- *
- * The pages will remain pinned as long as there is a reference against the
- * scif_pinned_pages_t value returned by scif_pin_pages() and until
- * scif_unpin_pages() is called, passing the scif_pinned_pages_t value. A
- * reference is added to a scif_pinned_pages_t value each time a window is
- * created by calling scif_register_pinned_pages() and passing the
- * scif_pinned_pages_t value. A reference is removed from a
- * scif_pinned_pages_t value each time such a window is deleted.
- *
- * Subsequent operations which change the memory pages to which virtual
- * addresses are mapped (such as mmap(), munmap()) have no effect on the
- * scif_pinned_pages_t value or windows created against it.
- *
- * If the process will fork(), it is recommended that the registered
- * virtual address range be marked with MADV_DONTFORK. Doing so will prevent
- * problems due to copy-on-write semantics.
- *
- * The prot_flags argument is formed by OR'ing together one or more of the
- * following values.
- * SCIF_PROT_READ - allow read operations against the pages
- * SCIF_PROT_WRITE - allow write operations against the pages
- * The map_flags argument can be set as SCIF_MAP_KERNEL to interpret addr as a
- * kernel space address. By default, addr is interpreted as a user space
- * address.
- *
- * Return:
- * Upon successful completion, scif_pin_pages() returns 0; otherwise the
- * negative of one of the following errors is returned.
- *
- * Errors:
- * EINVAL - prot_flags is invalid, map_flags is invalid, or offset is negative
- * ENOMEM - Not enough space
- */
-int scif_pin_pages(void *addr, size_t len, int prot_flags, int map_flags,
- scif_pinned_pages_t *pinned_pages);
-
-/**
- * scif_unpin_pages() - Unpin a set of pages
- * @pinned_pages: Handle to pinned pages to be unpinned
- *
- * scif_unpin_pages() prevents scif_register_pinned_pages() from registering new
- * windows against pinned_pages. The physical pages represented by pinned_pages
- * will remain pinned until all windows previously registered against
- * pinned_pages are deleted (the window is scif_unregister()'d and all
- * references to the window are removed (see scif_unregister()).
- *
- * pinned_pages must have been obtain from a previous call to scif_pin_pages().
- * After calling scif_unpin_pages(), it is an error to pass pinned_pages to
- * scif_register_pinned_pages().
- *
- * Return:
- * Upon successful completion, scif_unpin_pages() returns 0; otherwise the
- * negative of one of the following errors is returned.
- *
- * Errors:
- * EINVAL - pinned_pages is not valid
- */
-int scif_unpin_pages(scif_pinned_pages_t pinned_pages);
-
-/**
- * scif_register_pinned_pages() - Mark a memory region for remote access.
- * @epd: endpoint descriptor
- * @pinned_pages: Handle to pinned pages
- * @offset: Registered address space offset
- * @map_flags: Flags which control where pages are mapped
- *
- * The scif_register_pinned_pages() function opens a window, a range of whole
- * pages of the registered address space of the endpoint epd, starting at
- * offset po. The value of po, further described below, is a function of the
- * parameters offset and pinned_pages, and the value of map_flags. Each page of
- * the window represents a corresponding physical memory page of the range
- * represented by pinned_pages; the length of the window is the same as the
- * length of range represented by pinned_pages. A successful
- * scif_register_pinned_pages() call returns po as the return value.
- *
- * When SCIF_MAP_FIXED is set in the map_flags argument, po will be offset
- * exactly, and offset is constrained to be a multiple of the page size. The
- * mapping established by scif_register_pinned_pages() will not replace any
- * existing registration; an error is returned if any page of the new window
- * would intersect an existing window.
- *
- * When SCIF_MAP_FIXED is not set, the implementation uses offset in an
- * implementation-defined manner to arrive at po. The po so chosen will be an
- * area of the registered address space that the implementation deems suitable
- * for a mapping of the required size. An offset value of 0 is interpreted as
- * granting the implementation complete freedom in selecting po, subject to
- * constraints described below. A non-zero value of offset is taken to be a
- * suggestion of an offset near which the mapping should be placed. When the
- * implementation selects a value for po, it does not replace any extant
- * window. In all cases, po will be a multiple of the page size.
- *
- * The physical pages which are so represented by a window are available for
- * access in calls to scif_get_pages(), scif_readfrom(), scif_writeto(),
- * scif_vreadfrom(), and scif_vwriteto(). While a window is registered, the
- * physical pages represented by the window will not be reused by the memory
- * subsystem for any other purpose. Note that the same physical page may be
- * represented by multiple windows.
- *
- * Windows created by scif_register_pinned_pages() are unregistered by
- * scif_unregister().
- *
- * The map_flags argument can be set to SCIF_MAP_FIXED which interprets a
- * fixed offset.
- *
- * Return:
- * Upon successful completion, scif_register_pinned_pages() returns the offset
- * at which the mapping was placed (po); otherwise the negative of one of the
- * following errors is returned.
- *
- * Errors:
- * EADDRINUSE - SCIF_MAP_FIXED is set in map_flags and pages in the new window
- * would intersect an existing window
- * EAGAIN - The mapping could not be performed due to lack of resources
- * ECONNRESET - Connection reset by peer
- * EINVAL - map_flags is invalid, or SCIF_MAP_FIXED is set in map_flags, and
- * offset is not a multiple of the page size, or offset is negative
- * ENODEV - The remote node is lost or existed, but is not currently in the
- * network since it may have crashed
- * ENOMEM - Not enough space
- * ENOTCONN - The endpoint is not connected
- */
-off_t scif_register_pinned_pages(scif_epd_t epd,
- scif_pinned_pages_t pinned_pages,
- off_t offset, int map_flags);
-
-/**
- * scif_get_pages() - Add references to remote registered pages
- * @epd: endpoint descriptor
- * @offset: remote registered offset
- * @len: length of range of pages
- * @pages: returned scif_range structure
- *
- * scif_get_pages() returns the addresses of the physical pages represented by
- * those pages of the registered address space of the peer of epd, starting at
- * offset and continuing for len bytes. offset and len are constrained to be
- * multiples of the page size.
- *
- * All of the pages in the specified range [offset, offset + len - 1] must be
- * within a single window of the registered address space of the peer of epd.
- *
- * The addresses are returned as a virtually contiguous array pointed to by the
- * phys_addr component of the scif_range structure whose address is returned in
- * pages. The nr_pages component of scif_range is the length of the array. The
- * prot_flags component of scif_range holds the protection flag value passed
- * when the pages were registered.
- *
- * Each physical page whose address is returned by scif_get_pages() remains
- * available and will not be released for reuse until the scif_range structure
- * is returned in a call to scif_put_pages(). The scif_range structure returned
- * by scif_get_pages() must be unmodified.
- *
- * It is an error to call scif_close() on an endpoint on which a scif_range
- * structure of that endpoint has not been returned to scif_put_pages().
- *
- * Return:
- * Upon successful completion, scif_get_pages() returns 0; otherwise the
- * negative of one of the following errors is returned.
- * Errors:
- * ECONNRESET - Connection reset by peer.
- * EINVAL - offset is not a multiple of the page size, or offset is negative, or
- * len is not a multiple of the page size
- * ENODEV - The remote node is lost or existed, but is not currently in the
- * network since it may have crashed
- * ENOTCONN - The endpoint is not connected
- * ENXIO - Offsets in the range [offset, offset + len - 1] are invalid
- * for the registered address space of the peer epd
- */
-int scif_get_pages(scif_epd_t epd, off_t offset, size_t len,
- struct scif_range **pages);
-
-/**
- * scif_put_pages() - Remove references from remote registered pages
- * @pages: pages to be returned
- *
- * scif_put_pages() releases a scif_range structure previously obtained by
- * calling scif_get_pages(). The physical pages represented by pages may
- * be reused when the window which represented those pages is unregistered.
- * Therefore, those pages must not be accessed after calling scif_put_pages().
- *
- * Return:
- * Upon successful completion, scif_put_pages() returns 0; otherwise the
- * negative of one of the following errors is returned.
- * Errors:
- * EINVAL - pages does not point to a valid scif_range structure, or
- * the scif_range structure pointed to by pages was already returned
- * ENODEV - The remote node is lost or existed, but is not currently in the
- * network since it may have crashed
- * ENOTCONN - The endpoint is not connected
- */
-int scif_put_pages(struct scif_range *pages);
-
-/**
- * scif_poll() - Wait for some event on an endpoint
- * @epds: Array of endpoint descriptors
- * @nepds: Length of epds
- * @timeout: Upper limit on time for which scif_poll() will block
- *
- * scif_poll() waits for one of a set of endpoints to become ready to perform
- * an I/O operation.
- *
- * The epds argument specifies the endpoint descriptors to be examined and the
- * events of interest for each endpoint descriptor. epds is a pointer to an
- * array with one member for each open endpoint descriptor of interest.
- *
- * The number of items in the epds array is specified in nepds. The epd field
- * of scif_pollepd is an endpoint descriptor of an open endpoint. The field
- * events is a bitmask specifying the events which the application is
- * interested in. The field revents is an output parameter, filled by the
- * kernel with the events that actually occurred. The bits returned in revents
- * can include any of those specified in events, or one of the values EPOLLERR,
- * EPOLLHUP, or EPOLLNVAL. (These three bits are meaningless in the events
- * field, and will be set in the revents field whenever the corresponding
- * condition is true.)
- *
- * If none of the events requested (and no error) has occurred for any of the
- * endpoint descriptors, then scif_poll() blocks until one of the events occurs.
- *
- * The timeout argument specifies an upper limit on the time for which
- * scif_poll() will block, in milliseconds. Specifying a negative value in
- * timeout means an infinite timeout.
- *
- * The following bits may be set in events and returned in revents.
- * EPOLLIN - Data may be received without blocking. For a connected
- * endpoint, this means that scif_recv() may be called without blocking. For a
- * listening endpoint, this means that scif_accept() may be called without
- * blocking.
- * EPOLLOUT - Data may be sent without blocking. For a connected endpoint, this
- * means that scif_send() may be called without blocking. EPOLLOUT may also be
- * used to block waiting for a non-blocking connect to complete. This bit value
- * has no meaning for a listening endpoint and is ignored if specified.
- *
- * The following bits are only returned in revents, and are ignored if set in
- * events.
- * EPOLLERR - An error occurred on the endpoint
- * EPOLLHUP - The connection to the peer endpoint was disconnected
- * EPOLLNVAL - The specified endpoint descriptor is invalid.
- *
- * Return:
- * Upon successful completion, scif_poll() returns a non-negative value. A
- * positive value indicates the total number of endpoint descriptors that have
- * been selected (that is, endpoint descriptors for which the revents member is
- * non-zero). A value of 0 indicates that the call timed out and no endpoint
- * descriptors have been selected. Otherwise in user mode -1 is returned and
- * errno is set to indicate the error; in kernel mode the negative of one of
- * the following errors is returned.
- *
- * Errors:
- * EINTR - A signal occurred before any requested event
- * EINVAL - The nepds argument is greater than {OPEN_MAX}
- * ENOMEM - There was no space to allocate file descriptor tables
- */
-int scif_poll(struct scif_pollepd *epds, unsigned int nepds, long timeout);
-
-/**
- * scif_client_register() - Register a SCIF client
- * @client: client to be registered
- *
- * scif_client_register() registers a SCIF client. The probe() method
- * of the client is called when SCIF peer devices come online and the
- * remove() method is called when the peer devices disappear.
- *
- * Return:
- * Upon successful completion, scif_client_register() returns a non-negative
- * value. Otherwise the return value is the same as subsys_interface_register()
- * in the kernel.
- */
-int scif_client_register(struct scif_client *client);
-
-/**
- * scif_client_unregister() - Unregister a SCIF client
- * @client: client to be unregistered
- *
- * scif_client_unregister() unregisters a SCIF client.
- *
- * Return:
- * None
- */
-void scif_client_unregister(struct scif_client *client);
-
-#endif /* __SCIF_H__ */
memset(&set->sig[1], 0, sizeof(long)*(_NSIG_WORDS-1));
break;
case 2: set->sig[1] = 0;
+ break;
case 1: ;
}
}
memset(&set->sig[1], -1, sizeof(long)*(_NSIG_WORDS-1));
break;
case 2: set->sig[1] = -1;
+ break;
case 1: ;
}
}
*/
static inline s64 timespec64_to_ns(const struct timespec64 *ts)
{
+ /* Prevent multiplication overflow */
+ if ((unsigned long long)ts->tv_sec >= KTIME_SEC_MAX)
+ return KTIME_MAX;
+
return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
}
#define OS_STRING_IDX 0xEE
/**
- * struct usb_composite_device - represents one composite usb gadget
+ * struct usb_composite_dev - represents one composite usb gadget
* @gadget: read-only, abstracts the gadget's usb peripheral controller
* @req: used for control responses; buffer is pre-allocated
* @os_desc_req: used for OS descriptors responses; buffer is pre-allocated
int nvqs;
};
+/**
+ * vDPA IOVA range - the IOVA range support by the device
+ * @first: start of the IOVA range
+ * @last: end of the IOVA range
+ */
+struct vdpa_iova_range {
+ u64 first;
+ u64 last;
+};
+
/**
* vDPA_config_ops - operations for configuring a vDPA device.
* Note: vDPA device drivers are required to implement all of the
* @get_generation: Get device config generation (optional)
* @vdev: vdpa device
* Returns u32: device generation
+ * @get_iova_range: Get supported iova range (optional)
+ * @vdev: vdpa device
+ * Returns the iova range supported by
+ * the device.
* @set_map: Set device memory mapping (optional)
* Needed for device that using device
* specific DMA translation (on-chip IOMMU)
void (*set_config)(struct vdpa_device *vdev, unsigned int offset,
const void *buf, unsigned int len);
u32 (*get_generation)(struct vdpa_device *vdev);
+ struct vdpa_iova_range (*get_iova_range)(struct vdpa_device *vdev);
/* DMA ops */
int (*set_map)(struct vdpa_device *vdev, struct vhost_iotlb *iotlb);
int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
int *qp_attr_mask);
-/**
- * rdma_connect - Initiate an active connection request.
- * @id: Connection identifier to connect.
- * @conn_param: Connection information used for connected QPs.
- *
- * Users must have resolved a route for the rdma_cm_id to connect with
- * by having called rdma_resolve_route before calling this routine.
- *
- * This call will either connect to a remote QP or obtain remote QP
- * information for unconnected rdma_cm_id's. The actual operation is
- * based on the rdma_cm_id's port space.
- */
int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param);
+int rdma_connect_locked(struct rdma_cm_id *id,
+ struct rdma_conn_param *conn_param);
int rdma_connect_ece(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
struct rdma_ucm_ece *ece);
__entry->vnode, __entry->off, __entry->i_size)
);
-/*
- * We use page->private to hold the amount of the page that we've written to,
- * splitting the field into two parts. However, we need to represent a range
- * 0...PAGE_SIZE inclusive, so we can't support 64K pages on a 32-bit system.
- */
-#if PAGE_SIZE > 32768
-#define AFS_PRIV_MAX 0xffffffff
-#define AFS_PRIV_SHIFT 32
-#else
-#define AFS_PRIV_MAX 0xffff
-#define AFS_PRIV_SHIFT 16
-#endif
-
TRACE_EVENT(afs_page_dirty,
TP_PROTO(struct afs_vnode *vnode, const char *where,
pgoff_t page, unsigned long priv),
__entry->priv = priv;
),
- TP_printk("vn=%p %lx %s %lu-%lu",
+ TP_printk("vn=%p %lx %s %zx-%zx%s",
__entry->vnode, __entry->page, __entry->where,
- __entry->priv & AFS_PRIV_MAX,
- __entry->priv >> AFS_PRIV_SHIFT)
+ afs_page_dirty_from(__entry->priv),
+ afs_page_dirty_to(__entry->priv),
+ afs_is_page_dirty_mmapped(__entry->priv) ? " M" : "")
);
TRACE_EVENT(afs_call_state,
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2, as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * The full GNU General Public License is included in this distribution in
- * the file called "COPYING".
- *
- * Intel MIC driver.
- *
- */
-#ifndef __MIC_COMMON_H_
-#define __MIC_COMMON_H_
-
-#include <linux/virtio_ring.h>
-
-#define __mic_align(a, x) (((a) + (x) - 1) & ~((x) - 1))
-
-/**
- * struct mic_device_desc: Virtio device information shared between the
- * virtio driver and userspace backend
- *
- * @type: Device type: console/network/disk etc. Type 0/-1 terminates.
- * @num_vq: Number of virtqueues.
- * @feature_len: Number of bytes of feature bits. Multiply by 2: one for
- host features and one for guest acknowledgements.
- * @config_len: Number of bytes of the config array after virtqueues.
- * @status: A status byte, written by the Guest.
- * @config: Start of the following variable length config.
- */
-struct mic_device_desc {
- __s8 type;
- __u8 num_vq;
- __u8 feature_len;
- __u8 config_len;
- __u8 status;
- __le64 config[0];
-} __attribute__ ((aligned(8)));
-
-/**
- * struct mic_device_ctrl: Per virtio device information in the device page
- * used internally by the host and card side drivers.
- *
- * @vdev: Used for storing MIC vdev information by the guest.
- * @config_change: Set to 1 by host when a config change is requested.
- * @vdev_reset: Set to 1 by guest to indicate virtio device has been reset.
- * @guest_ack: Set to 1 by guest to ack a command.
- * @host_ack: Set to 1 by host to ack a command.
- * @used_address_updated: Set to 1 by guest when the used address should be
- * updated.
- * @c2h_vdev_db: The doorbell number to be used by guest. Set by host.
- * @h2c_vdev_db: The doorbell number to be used by host. Set by guest.
- */
-struct mic_device_ctrl {
- __le64 vdev;
- __u8 config_change;
- __u8 vdev_reset;
- __u8 guest_ack;
- __u8 host_ack;
- __u8 used_address_updated;
- __s8 c2h_vdev_db;
- __s8 h2c_vdev_db;
-} __attribute__ ((aligned(8)));
-
-/**
- * struct mic_bootparam: Virtio device independent information in device page
- *
- * @magic: A magic value used by the card to ensure it can see the host
- * @h2c_config_db: Host to Card Virtio config doorbell set by card
- * @node_id: Unique id of the node
- * @h2c_scif_db - Host to card SCIF doorbell set by card
- * @c2h_scif_db - Card to host SCIF doorbell set by host
- * @scif_host_dma_addr - SCIF host queue pair DMA address
- * @scif_card_dma_addr - SCIF card queue pair DMA address
- */
-struct mic_bootparam {
- __le32 magic;
- __s8 h2c_config_db;
- __u8 node_id;
- __u8 h2c_scif_db;
- __u8 c2h_scif_db;
- __u64 scif_host_dma_addr;
- __u64 scif_card_dma_addr;
-} __attribute__ ((aligned(8)));
-
-/**
- * struct mic_device_page: High level representation of the device page
- *
- * @bootparam: The bootparam structure is used for sharing information and
- * status updates between MIC host and card drivers.
- * @desc: Array of MIC virtio device descriptors.
- */
-struct mic_device_page {
- struct mic_bootparam bootparam;
- struct mic_device_desc desc[0];
-};
-/**
- * struct mic_vqconfig: This is how we expect the device configuration field
- * for a virtqueue to be laid out in config space.
- *
- * @address: Guest/MIC physical address of the virtio ring
- * (avail and desc rings)
- * @used_address: Guest/MIC physical address of the used ring
- * @num: The number of entries in the virtio_ring
- */
-struct mic_vqconfig {
- __le64 address;
- __le64 used_address;
- __le16 num;
-} __attribute__ ((aligned(8)));
-
-/*
- * The alignment to use between consumer and producer parts of vring.
- * This is pagesize for historical reasons.
- */
-#define MIC_VIRTIO_RING_ALIGN 4096
-
-#define MIC_MAX_VRINGS 4
-#define MIC_VRING_ENTRIES 128
-
-/*
- * Max vring entries (power of 2) to ensure desc and avail rings
- * fit in a single page
- */
-#define MIC_MAX_VRING_ENTRIES 128
-
-/**
- * Max size of the desc block in bytes: includes:
- * - struct mic_device_desc
- * - struct mic_vqconfig (num_vq of these)
- * - host and guest features
- * - virtio device config space
- */
-#define MIC_MAX_DESC_BLK_SIZE 256
-
-/**
- * struct _mic_vring_info - Host vring info exposed to userspace backend
- * for the avail index and magic for the card.
- *
- * @avail_idx: host avail idx
- * @magic: A magic debug cookie.
- */
-struct _mic_vring_info {
- __u16 avail_idx;
- __le32 magic;
-};
-
-/**
- * struct mic_vring - Vring information.
- *
- * @vr: The virtio ring.
- * @info: Host vring information exposed to the userspace backend for the
- * avail index and magic for the card.
- * @va: The va for the buffer allocated for vr and info.
- * @len: The length of the buffer required for allocating vr and info.
- */
-struct mic_vring {
- struct vring vr;
- struct _mic_vring_info *info;
- void *va;
- int len;
-};
-
-#define mic_aligned_desc_size(d) __mic_align(mic_desc_size(d), 8)
-
-#ifndef INTEL_MIC_CARD
-static inline unsigned mic_desc_size(const struct mic_device_desc *desc)
-{
- return sizeof(*desc) + desc->num_vq * sizeof(struct mic_vqconfig)
- + desc->feature_len * 2 + desc->config_len;
-}
-
-static inline struct mic_vqconfig *
-mic_vq_config(const struct mic_device_desc *desc)
-{
- return (struct mic_vqconfig *)(desc + 1);
-}
-
-static inline __u8 *mic_vq_features(const struct mic_device_desc *desc)
-{
- return (__u8 *)(mic_vq_config(desc) + desc->num_vq);
-}
-
-static inline __u8 *mic_vq_configspace(const struct mic_device_desc *desc)
-{
- return mic_vq_features(desc) + desc->feature_len * 2;
-}
-static inline unsigned mic_total_desc_size(struct mic_device_desc *desc)
-{
- return mic_aligned_desc_size(desc) + sizeof(struct mic_device_ctrl);
-}
-#endif
-
-/* Device page size */
-#define MIC_DP_SIZE 4096
-
-#define MIC_MAGIC 0xc0ffee00
-
-/**
- * enum mic_states - MIC states.
- */
-enum mic_states {
- MIC_READY = 0,
- MIC_BOOTING,
- MIC_ONLINE,
- MIC_SHUTTING_DOWN,
- MIC_RESETTING,
- MIC_RESET_FAILED,
- MIC_LAST
-};
-
-/**
- * enum mic_status - MIC status reported by card after
- * a host or card initiated shutdown or a card crash.
- */
-enum mic_status {
- MIC_NOP = 0,
- MIC_CRASHED,
- MIC_HALTED,
- MIC_POWER_OFF,
- MIC_RESTART,
- MIC_STATUS_LAST
-};
-
-#endif
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2, as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * The full GNU General Public License is included in this distribution in
- * the file called "COPYING".
- *
- * Intel MIC Host driver.
- *
- */
-#ifndef _MIC_IOCTL_H_
-#define _MIC_IOCTL_H_
-
-#include <linux/types.h>
-
-/*
- * mic_copy - MIC virtio descriptor copy.
- *
- * @iov: An array of IOVEC structures containing user space buffers.
- * @iovcnt: Number of IOVEC structures in iov.
- * @vr_idx: The vring index.
- * @update_used: A non zero value results in used index being updated.
- * @out_len: The aggregate of the total length written to or read from
- * the virtio device.
- */
-struct mic_copy_desc {
-#ifdef __KERNEL__
- struct iovec __user *iov;
-#else
- struct iovec *iov;
-#endif
- __u32 iovcnt;
- __u8 vr_idx;
- __u8 update_used;
- __u32 out_len;
-};
-
-/*
- * Add a new virtio device
- * The (struct mic_device_desc *) pointer points to a device page entry
- * for the virtio device consisting of:
- * - struct mic_device_desc
- * - struct mic_vqconfig (num_vq of these)
- * - host and guest features
- * - virtio device config space
- * The total size referenced by the pointer should equal the size returned
- * by desc_size() in mic_common.h
- */
-#define MIC_VIRTIO_ADD_DEVICE _IOWR('s', 1, struct mic_device_desc *)
-
-/*
- * Copy the number of entries in the iovec and update the used index
- * if requested by the user.
- */
-#define MIC_VIRTIO_COPY_DESC _IOWR('s', 2, struct mic_copy_desc *)
-
-/*
- * Notify virtio device of a config change
- * The (__u8 *) pointer points to config space values for the device
- * as they should be written into the device page. The total size
- * referenced by the pointer should equal the config_len field of struct
- * mic_device_desc.
- */
-#define MIC_VIRTIO_CONFIG_CHANGE _IOWR('s', 5, __u8 *)
-
-#endif
/* Set event fd for config interrupt*/
#define VHOST_VDPA_SET_CONFIG_CALL _IOW(VHOST_VIRTIO, 0x77, int)
+
+/* Get the valid iova range */
+#define VHOST_VDPA_GET_IOVA_RANGE _IOR(VHOST_VIRTIO, 0x78, \
+ struct vhost_vdpa_iova_range)
#endif
__u8 buf[0];
};
+/* vhost vdpa IOVA range
+ * @first: First address that can be mapped by vhost-vDPA
+ * @last: Last address that can be mapped by vhost-vDPA
+ */
+struct vhost_vdpa_iova_range {
+ __u64 first;
+ __u64 last;
+};
+
/* Feature bits */
/* Log all write descriptors. Can be changed while device is active. */
#define VHOST_F_LOG_ALL 26
*/
newval = FUTEX_WAITERS | task_pid_vnr(new_owner);
- if (unlikely(should_fail_futex(true)))
+ if (unlikely(should_fail_futex(true))) {
ret = -EFAULT;
+ goto out_unlock;
+ }
ret = cmpxchg_futex_value_locked(&curval, uaddr, uval, newval);
if (!ret && (curval != uval)) {
* Process updating of timeout sysctl
*/
int proc_dohung_task_timeout_secs(struct ctl_table *table, int write,
- void __user *buffer,
- size_t *lenp, loff_t *ppos)
+ void *buffer, size_t *lenp, loff_t *ppos)
{
int ret;
/* Move the work from worker->delayed_work_list. */
WARN_ON_ONCE(list_empty(&work->node));
list_del_init(&work->node);
- kthread_insert_work(worker, work, &worker->work_list);
+ if (!work->canceling)
+ kthread_insert_work(worker, work, &worker->work_list);
raw_spin_unlock_irqrestore(&worker->lock, flags);
}
if (!debug_locks)
return false;
- if (raw_cpu_read(lockdep_recursion))
+ if (this_cpu_read(lockdep_recursion))
return false;
if (current->lockdep_recursion)
if (unlikely(in_nmi()))
return;
- if (unlikely(__this_cpu_read(lockdep_recursion)))
+ if (unlikely(this_cpu_read(lockdep_recursion)))
return;
if (unlikely(lockdep_hardirqs_enabled())) {
goto skip_checks;
}
- if (unlikely(__this_cpu_read(lockdep_recursion)))
+ if (unlikely(this_cpu_read(lockdep_recursion)))
return;
if (lockdep_hardirqs_enabled()) {
if (unlikely(hlock_class(this)->usage_mask & new_mask))
goto unlock;
+ if (!hlock_class(this)->usage_mask)
+ debug_atomic_dec(nr_unused_locks);
+
hlock_class(this)->usage_mask |= new_mask;
if (new_bit < LOCK_TRACE_STATES) {
return 0;
}
- switch (new_bit) {
- case 0 ... LOCK_USED-1:
+ if (new_bit < LOCK_USED) {
ret = mark_lock_irq(curr, this, new_bit);
if (!ret)
return 0;
- break;
-
- case LOCK_USED:
- debug_atomic_dec(nr_unused_locks);
- break;
-
- default:
- break;
}
unlock:
{
unsigned int num;
struct attribute_group grp;
- struct param_attribute attrs[0];
+ struct param_attribute attrs[];
};
#ifdef CONFIG_SYSFS
BUG_ON(in_atomic());
/*
- * Now that the whole userspace is frozen we need to disbale
+ * Now that the whole userspace is frozen we need to disable
* the OOM killer to disallow any further interference with
* killable tasks. There is no guarantee oom victims will
* ever reach a point they go away we have to wait with a timeout.
*/
struct prb_data_block {
unsigned long id;
- char data[0];
+ char data[];
};
/*
*
* The caller must have disabled interrupts and must not be idle.
*/
-void rcu_momentary_dyntick_idle(void)
+notrace void rcu_momentary_dyntick_idle(void)
{
int special;
static bool sugov_update_next_freq(struct sugov_policy *sg_policy, u64 time,
unsigned int next_freq)
{
- if (sg_policy->next_freq == next_freq)
+ if (sg_policy->next_freq == next_freq &&
+ !cpufreq_driver_test_flags(CPUFREQ_NEED_UPDATE_LIMITS))
return false;
sg_policy->next_freq = next_freq;
freq = map_util_freq(util, freq, max);
- if (freq == sg_policy->cached_raw_freq && !sg_policy->need_freq_update)
+ if (freq == sg_policy->cached_raw_freq && !sg_policy->need_freq_update &&
+ !cpufreq_driver_test_flags(CPUFREQ_NEED_UPDATE_LIMITS))
return sg_policy->next_freq;
sg_policy->need_freq_update = false;
void task_join_group_stop(struct task_struct *task)
{
+ unsigned long mask = current->jobctl & JOBCTL_STOP_SIGMASK;
+ struct signal_struct *sig = current->signal;
+
+ if (sig->group_stop_count) {
+ sig->group_stop_count++;
+ mask |= JOBCTL_STOP_CONSUME;
+ } else if (!(sig->flags & SIGNAL_STOP_STOPPED))
+ return;
+
/* Have the new thread join an on-going signal group stop */
- unsigned long jobctl = current->jobctl;
- if (jobctl & JOBCTL_STOP_PENDING) {
- struct signal_struct *sig = current->signal;
- unsigned long signr = jobctl & JOBCTL_STOP_SIGMASK;
- unsigned long gstop = JOBCTL_STOP_PENDING | JOBCTL_STOP_CONSUME;
- if (task_set_jobctl_pending(task, signr | gstop)) {
- sig->group_stop_count++;
- }
- }
+ task_set_jobctl_pending(task, mask | JOBCTL_STOP_PENDING);
}
/*
set_state(msdata, msdata->state + 1);
}
-void __weak stop_machine_yield(const struct cpumask *cpumask)
+notrace void __weak stop_machine_yield(const struct cpumask *cpumask)
{
cpu_relax();
}
debug_object_deactivate(timer, &hrtimer_debug_descr);
}
-static inline void debug_hrtimer_free(struct hrtimer *timer)
-{
- debug_object_free(timer, &hrtimer_debug_descr);
-}
-
static void __hrtimer_init(struct hrtimer *timer, clockid_t clock_id,
enum hrtimer_mode mode);
u64 oval, nval, ointerval, ninterval;
struct cpu_itimer *it = &tsk->signal->it[clock_id];
- /*
- * Use the to_ktime conversion because that clamps the maximum
- * value to KTIME_MAX and avoid multiplication overflows.
- */
nval = timespec64_to_ns(&value->it_value);
ninterval = timespec64_to_ns(&value->it_interval);
return (cyc * mult) >> shift;
}
-struct clock_read_data *sched_clock_read_begin(unsigned int *seq)
+notrace struct clock_read_data *sched_clock_read_begin(unsigned int *seq)
{
*seq = raw_read_seqcount_latch(&cd.seq);
return cd.read_data + (*seq & 1);
}
-int sched_clock_read_retry(unsigned int seq)
+notrace int sched_clock_read_retry(unsigned int seq)
{
return read_seqcount_latch_retry(&cd.seq, seq);
}
debug_object_deactivate(timer, &timer_debug_descr);
}
-static inline void debug_timer_free(struct timer_list *timer)
-{
- debug_object_free(timer, &timer_debug_descr);
-}
-
static inline void debug_timer_assert_init(struct timer_list *timer)
{
debug_object_assert_init(timer, &timer_debug_descr);
struct synth_field *field;
const char *prefix = NULL, *field_type = argv[0], *field_name, *array;
int len, ret = 0;
+ struct seq_buf s;
ssize_t size;
if (field_type[0] == ';')
field_type++;
len = strlen(field_type) + 1;
- if (array) {
- int l = strlen(array);
+ if (array)
+ len += strlen(array);
- if (l && array[l - 1] == ';')
- l--;
- len += l;
- }
if (prefix)
len += strlen(prefix);
ret = -ENOMEM;
goto free;
}
+ seq_buf_init(&s, field->type, len);
if (prefix)
- strcat(field->type, prefix);
- strcat(field->type, field_type);
+ seq_buf_puts(&s, prefix);
+ seq_buf_puts(&s, field_type);
if (array) {
- strcat(field->type, array);
- if (field->type[len - 1] == ';')
- field->type[len - 1] = '\0';
+ seq_buf_puts(&s, array);
+ if (s.buffer[s.len - 1] == ';')
+ s.len--;
}
+ if (WARN_ON_ONCE(!seq_buf_buffer_left(&s)))
+ goto free;
+ s.buffer[s.len] = '\0';
size = synth_field_size(field->type);
if (size < 0) {
if (synth_field_is_string(field->type)) {
char *type;
- type = kzalloc(sizeof("__data_loc ") + strlen(field->type) + 1, GFP_KERNEL);
+ len = sizeof("__data_loc ") + strlen(field->type) + 1;
+ type = kzalloc(len, GFP_KERNEL);
if (!type) {
ret = -ENOMEM;
goto free;
}
- strcat(type, "__data_loc ");
- strcat(type, field->type);
+ seq_buf_init(&s, type, len);
+ seq_buf_puts(&s, "__data_loc ");
+ seq_buf_puts(&s, field->type);
+
+ if (WARN_ON_ONCE(!seq_buf_buffer_left(&s)))
+ goto free;
+ s.buffer[s.len] = '\0';
+
kfree(field->type);
field->type = type;
*/
struct tp_probes {
struct rcu_head rcu;
- struct tracepoint_func probes[0];
+ struct tracepoint_func probes[];
};
static inline void *allocate_probes(int count)
endmenu # "Kernel Testing and Coverage"
+source "Documentation/Kconfig"
+
endmenu # Kernel hacking
/* reduce OS noise */
local_irq_save(flags);
- local_irq_disable();
nsec = ktime_get_ns();
for (i = 0; i < 100; i++) {
nsec = ktime_get_ns() - nsec;
local_irq_restore(flags);
- local_irq_enable();
pr_info("crc32c: CRC_LE_BITS = %d\n", CRC_LE_BITS);
/* reduce OS noise */
local_irq_save(flags);
- local_irq_disable();
nsec = ktime_get_ns();
for (i = 0; i < 100; i++) {
nsec = ktime_get_ns() - nsec;
local_irq_restore(flags);
- local_irq_enable();
pr_info("crc32: CRC_LE_BITS = %d, CRC_BE BITS = %d\n",
CRC_LE_BITS, CRC_BE_BITS);
sg_miter_start(&miter, sgl, nents, sg_flags);
if (!sg_miter_skip(&miter, skip))
- return false;
+ return 0;
while ((offset < buflen) && sg_miter_next(&miter)) {
unsigned int len;
u64 words[2];
} *ptr1, *ptr2;
+ /* This test is specifically crafted for the generic mode. */
+ if (!IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+ kunit_info(test, "CONFIG_KASAN_GENERIC required\n");
+ return;
+ }
+
ptr1 = kmalloc(sizeof(*ptr1) - 3, GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr1);
kfree(ptr2);
}
+static void kmalloc_uaf_16(struct kunit *test)
+{
+ struct {
+ u64 words[2];
+ } *ptr1, *ptr2;
+
+ ptr1 = kmalloc(sizeof(*ptr1), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr1);
+
+ ptr2 = kmalloc(sizeof(*ptr2), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr2);
+ kfree(ptr2);
+
+ KUNIT_EXPECT_KASAN_FAIL(test, *ptr1 = *ptr2);
+ kfree(ptr1);
+}
+
static void kmalloc_oob_memset_2(struct kunit *test)
{
char *ptr;
volatile int i = 3;
char *p = &global_array[ARRAY_SIZE(global_array) + i];
+ /* Only generic mode instruments globals. */
+ if (!IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+ kunit_info(test, "CONFIG_KASAN_GENERIC required");
+ return;
+ }
+
KUNIT_EXPECT_KASAN_FAIL(test, *(volatile char *)p);
}
char alloca_array[i];
char *p = alloca_array - 1;
+ /* Only generic mode instruments dynamic allocas. */
+ if (!IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+ kunit_info(test, "CONFIG_KASAN_GENERIC required");
+ return;
+ }
+
if (!IS_ENABLED(CONFIG_KASAN_STACK)) {
kunit_info(test, "CONFIG_KASAN_STACK is not enabled");
return;
char alloca_array[i];
char *p = alloca_array + i;
+ /* Only generic mode instruments dynamic allocas. */
+ if (!IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+ kunit_info(test, "CONFIG_KASAN_GENERIC required");
+ return;
+ }
+
if (!IS_ENABLED(CONFIG_KASAN_STACK)) {
kunit_info(test, "CONFIG_KASAN_STACK is not enabled");
return;
return;
}
+ if (OOB_TAG_OFF)
+ size = round_up(size, OOB_TAG_OFF);
+
ptr = kmalloc(size, GFP_KERNEL | __GFP_ZERO);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
return;
}
+ if (OOB_TAG_OFF)
+ size = round_up(size, OOB_TAG_OFF);
+
ptr = kmalloc(size, GFP_KERNEL | __GFP_ZERO);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
memset(arr, 0, sizeof(arr));
KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = strnlen(ptr, 1));
}
-static void kasan_bitops(struct kunit *test)
+static void kasan_bitops_modify(struct kunit *test, int nr, void *addr)
+{
+ KUNIT_EXPECT_KASAN_FAIL(test, set_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, __set_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, clear_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, __clear_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, clear_bit_unlock(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, __clear_bit_unlock(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, change_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, __change_bit(nr, addr));
+}
+
+static void kasan_bitops_test_and_modify(struct kunit *test, int nr, void *addr)
+{
+ KUNIT_EXPECT_KASAN_FAIL(test, test_and_set_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, __test_and_set_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, test_and_set_bit_lock(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, test_and_clear_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, __test_and_clear_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, test_and_change_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, __test_and_change_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = test_bit(nr, addr));
+
+#if defined(clear_bit_unlock_is_negative_byte)
+ KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result =
+ clear_bit_unlock_is_negative_byte(nr, addr));
+#endif
+}
+
+static void kasan_bitops_generic(struct kunit *test)
{
+ long *bits;
+
+ /* This test is specifically crafted for the generic mode. */
+ if (!IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+ kunit_info(test, "CONFIG_KASAN_GENERIC required\n");
+ return;
+ }
+
/*
* Allocate 1 more byte, which causes kzalloc to round up to 16-bytes;
* this way we do not actually corrupt other memory.
*/
- long *bits = kzalloc(sizeof(*bits) + 1, GFP_KERNEL);
+ bits = kzalloc(sizeof(*bits) + 1, GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, bits);
/*
* below accesses are still out-of-bounds, since bitops are defined to
* operate on the whole long the bit is in.
*/
- KUNIT_EXPECT_KASAN_FAIL(test, set_bit(BITS_PER_LONG, bits));
-
- KUNIT_EXPECT_KASAN_FAIL(test, __set_bit(BITS_PER_LONG, bits));
-
- KUNIT_EXPECT_KASAN_FAIL(test, clear_bit(BITS_PER_LONG, bits));
-
- KUNIT_EXPECT_KASAN_FAIL(test, __clear_bit(BITS_PER_LONG, bits));
-
- KUNIT_EXPECT_KASAN_FAIL(test, clear_bit_unlock(BITS_PER_LONG, bits));
-
- KUNIT_EXPECT_KASAN_FAIL(test, __clear_bit_unlock(BITS_PER_LONG, bits));
-
- KUNIT_EXPECT_KASAN_FAIL(test, change_bit(BITS_PER_LONG, bits));
-
- KUNIT_EXPECT_KASAN_FAIL(test, __change_bit(BITS_PER_LONG, bits));
+ kasan_bitops_modify(test, BITS_PER_LONG, bits);
/*
* Below calls try to access bit beyond allocated memory.
*/
- KUNIT_EXPECT_KASAN_FAIL(test,
- test_and_set_bit(BITS_PER_LONG + BITS_PER_BYTE, bits));
-
- KUNIT_EXPECT_KASAN_FAIL(test,
- __test_and_set_bit(BITS_PER_LONG + BITS_PER_BYTE, bits));
-
- KUNIT_EXPECT_KASAN_FAIL(test,
- test_and_set_bit_lock(BITS_PER_LONG + BITS_PER_BYTE, bits));
+ kasan_bitops_test_and_modify(test, BITS_PER_LONG + BITS_PER_BYTE, bits);
- KUNIT_EXPECT_KASAN_FAIL(test,
- test_and_clear_bit(BITS_PER_LONG + BITS_PER_BYTE, bits));
+ kfree(bits);
+}
- KUNIT_EXPECT_KASAN_FAIL(test,
- __test_and_clear_bit(BITS_PER_LONG + BITS_PER_BYTE, bits));
+static void kasan_bitops_tags(struct kunit *test)
+{
+ long *bits;
- KUNIT_EXPECT_KASAN_FAIL(test,
- test_and_change_bit(BITS_PER_LONG + BITS_PER_BYTE, bits));
+ /* This test is specifically crafted for the tag-based mode. */
+ if (IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+ kunit_info(test, "CONFIG_KASAN_SW_TAGS required\n");
+ return;
+ }
- KUNIT_EXPECT_KASAN_FAIL(test,
- __test_and_change_bit(BITS_PER_LONG + BITS_PER_BYTE, bits));
+ /* Allocation size will be rounded to up granule size, which is 16. */
+ bits = kzalloc(sizeof(*bits), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, bits);
- KUNIT_EXPECT_KASAN_FAIL(test,
- kasan_int_result =
- test_bit(BITS_PER_LONG + BITS_PER_BYTE, bits));
+ /* Do the accesses past the 16 allocated bytes. */
+ kasan_bitops_modify(test, BITS_PER_LONG, &bits[1]);
+ kasan_bitops_test_and_modify(test, BITS_PER_LONG + BITS_PER_BYTE, &bits[1]);
-#if defined(clear_bit_unlock_is_negative_byte)
- KUNIT_EXPECT_KASAN_FAIL(test,
- kasan_int_result = clear_bit_unlock_is_negative_byte(
- BITS_PER_LONG + BITS_PER_BYTE, bits));
-#endif
kfree(bits);
}
KUNIT_CASE(kmalloc_oob_krealloc_more),
KUNIT_CASE(kmalloc_oob_krealloc_less),
KUNIT_CASE(kmalloc_oob_16),
+ KUNIT_CASE(kmalloc_uaf_16),
KUNIT_CASE(kmalloc_oob_in_memset),
KUNIT_CASE(kmalloc_oob_memset_2),
KUNIT_CASE(kmalloc_oob_memset_4),
KUNIT_CASE(kasan_memchr),
KUNIT_CASE(kasan_memcmp),
KUNIT_CASE(kasan_strings),
- KUNIT_CASE(kasan_bitops),
+ KUNIT_CASE(kasan_bitops_generic),
+ KUNIT_CASE(kasan_bitops_tags),
KUNIT_CASE(kmalloc_double_kzfree),
KUNIT_CASE(vmalloc_oob),
{}
}
del += t - f;
+ hugetlb_cgroup_uncharge_file_region(
+ resv, rg, t - f);
/* New entry for end of split region */
nrg->from = t;
/* Original entry is trimmed */
rg->to = f;
- hugetlb_cgroup_uncharge_file_region(
- resv, rg, nrg->to - nrg->from);
-
list_add(&nrg->link, &rg->link);
nrg = NULL;
break;
}
if (f <= rg->from) { /* Trim beginning of region */
- del += t - rg->from;
- rg->from = t;
-
hugetlb_cgroup_uncharge_file_region(resv, rg,
t - rg->from);
- } else { /* Trim end of region */
- del += rg->to - f;
- rg->to = f;
+ del += t - rg->from;
+ rg->from = t;
+ } else { /* Trim end of region */
hugetlb_cgroup_uncharge_file_region(resv, rg,
rg->to - f);
+
+ del += rg->to - f;
+ rg->to = f;
}
}
rsv_adjust = hugepage_subpool_put_pages(spool, 1);
hugetlb_acct_memory(h, -rsv_adjust);
+ if (deferred_reserve)
+ hugetlb_cgroup_uncharge_page_rsvd(hstate_index(h),
+ pages_per_huge_page(h), page);
}
return page;
(u64)memsw * PAGE_SIZE);
for (i = 0; i < ARRAY_SIZE(memcg1_stats); i++) {
+ unsigned long nr;
+
if (memcg1_stats[i] == MEMCG_SWAP && !do_memsw_account())
continue;
+ nr = memcg_page_state(memcg, memcg1_stats[i]);
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+ if (memcg1_stats[i] == NR_ANON_THPS)
+ nr *= HPAGE_PMD_NR;
+#endif
seq_printf(m, "total_%s %llu\n", memcg1_stat_names[i],
- (u64)memcg_page_state(memcg, memcg1_stats[i]) *
- PAGE_SIZE);
+ (u64)nr * PAGE_SIZE);
}
for (i = 0; i < ARRAY_SIZE(memcg1_events); i++)
memcg->swappiness = mem_cgroup_swappiness(parent);
memcg->oom_kill_disable = parent->oom_kill_disable;
}
- if (parent && parent->use_hierarchy) {
+ if (!parent) {
+ page_counter_init(&memcg->memory, NULL);
+ page_counter_init(&memcg->swap, NULL);
+ page_counter_init(&memcg->kmem, NULL);
+ page_counter_init(&memcg->tcpmem, NULL);
+ } else if (parent->use_hierarchy) {
memcg->use_hierarchy = true;
page_counter_init(&memcg->memory, &parent->memory);
page_counter_init(&memcg->swap, &parent->swap);
page_counter_init(&memcg->kmem, &parent->kmem);
page_counter_init(&memcg->tcpmem, &parent->tcpmem);
} else {
- page_counter_init(&memcg->memory, NULL);
- page_counter_init(&memcg->swap, NULL);
- page_counter_init(&memcg->kmem, NULL);
- page_counter_init(&memcg->tcpmem, NULL);
+ page_counter_init(&memcg->memory, &root_mem_cgroup->memory);
+ page_counter_init(&memcg->swap, &root_mem_cgroup->swap);
+ page_counter_init(&memcg->kmem, &root_mem_cgroup->kmem);
+ page_counter_init(&memcg->tcpmem, &root_mem_cgroup->tcpmem);
/*
* Deeper hierachy with use_hierarchy == false doesn't make
* much sense so let cgroup subsystem know about this
unsigned long flags = qp->flags;
int ret;
bool has_unmovable = false;
- pte_t *pte;
+ pte_t *pte, *mapped_pte;
spinlock_t *ptl;
ptl = pmd_trans_huge_lock(pmd, vma);
if (pmd_trans_unstable(pmd))
return 0;
- pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
+ mapped_pte = pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
for (; addr != end; pte++, addr += PAGE_SIZE) {
if (!pte_present(*pte))
continue;
} else
break;
}
- pte_unmap_unlock(pte - 1, ptl);
+ pte_unmap_unlock(mapped_pte, ptl);
cond_resched();
if (has_unmovable)
DEFINE_STATIC_KEY_FALSE(devmap_managed_key);
EXPORT_SYMBOL(devmap_managed_key);
-static void devmap_managed_enable_put(void)
+static void devmap_managed_enable_put(struct dev_pagemap *pgmap)
{
- static_branch_dec(&devmap_managed_key);
+ if (pgmap->type == MEMORY_DEVICE_PRIVATE ||
+ pgmap->type == MEMORY_DEVICE_FS_DAX)
+ static_branch_dec(&devmap_managed_key);
}
-static int devmap_managed_enable_get(struct dev_pagemap *pgmap)
+static void devmap_managed_enable_get(struct dev_pagemap *pgmap)
{
- if (pgmap->type == MEMORY_DEVICE_PRIVATE &&
- (!pgmap->ops || !pgmap->ops->page_free)) {
- WARN(1, "Missing page_free method\n");
- return -EINVAL;
- }
-
- static_branch_inc(&devmap_managed_key);
- return 0;
+ if (pgmap->type == MEMORY_DEVICE_PRIVATE ||
+ pgmap->type == MEMORY_DEVICE_FS_DAX)
+ static_branch_inc(&devmap_managed_key);
}
#else
-static int devmap_managed_enable_get(struct dev_pagemap *pgmap)
+static void devmap_managed_enable_get(struct dev_pagemap *pgmap)
{
- return -EINVAL;
}
-static void devmap_managed_enable_put(void)
+static void devmap_managed_enable_put(struct dev_pagemap *pgmap)
{
}
#endif /* CONFIG_DEV_PAGEMAP_OPS */
pageunmap_range(pgmap, i);
WARN_ONCE(pgmap->altmap.alloc, "failed to free all reserved pages\n");
- devmap_managed_enable_put();
+ devmap_managed_enable_put(pgmap);
}
EXPORT_SYMBOL_GPL(memunmap_pages);
.pgprot = PAGE_KERNEL,
};
const int nr_range = pgmap->nr_range;
- bool need_devmap_managed = true;
int error, i;
if (WARN_ONCE(!nr_range, "nr_range must be specified\n"))
WARN(1, "Missing migrate_to_ram method\n");
return ERR_PTR(-EINVAL);
}
+ if (!pgmap->ops->page_free) {
+ WARN(1, "Missing page_free method\n");
+ return ERR_PTR(-EINVAL);
+ }
if (!pgmap->owner) {
WARN(1, "Missing owner\n");
return ERR_PTR(-EINVAL);
}
break;
case MEMORY_DEVICE_GENERIC:
- need_devmap_managed = false;
break;
case MEMORY_DEVICE_PCI_P2PDMA:
params.pgprot = pgprot_noncached(params.pgprot);
- need_devmap_managed = false;
break;
default:
WARN(1, "Invalid pgmap type %d\n", pgmap->type);
}
}
- if (need_devmap_managed) {
- error = devmap_managed_enable_get(pgmap);
- if (error)
- return ERR_PTR(error);
- }
+ devmap_managed_enable_get(pgmap);
/*
* Clear the pgmap nr_range as it will be incremented for each
* Copyright (C) 2010-2011 Christopher Yeoh <cyeoh@au1.ibm.com>, IBM Corp.
*/
+#include <linux/compat.h>
#include <linux/mm.h>
#include <linux/uio.h>
#include <linux/sched.h>
return rc;
if (!iov_iter_count(&iter))
goto free_iov_l;
- iov_r = iovec_from_user(rvec, riovcnt, UIO_FASTIOV, iovstack_r, false);
+ iov_r = iovec_from_user(rvec, riovcnt, UIO_FASTIOV, iovstack_r,
+ in_compat_syscall());
if (IS_ERR(iov_r)) {
rc = PTR_ERR(iov_r);
goto free_iov_l;
}
EXPORT_SYMBOL(truncate_inode_pages_final);
-unsigned long __invalidate_mapping_pages(struct address_space *mapping,
+static unsigned long __invalidate_mapping_pages(struct address_space *mapping,
pgoff_t start, pgoff_t end, unsigned long *nr_pagevec)
{
pgoff_t indices[PAGEVEC_SIZE];
struct msft_cp_read_supported_features {
__u8 sub_opcode;
} __packed;
+
struct msft_rp_read_supported_features {
__u8 status;
__u8 sub_opcode;
__le64 features;
__u8 evt_prefix_len;
- __u8 evt_prefix[0];
+ __u8 evt_prefix[];
} __packed;
struct msft_data {
if (err)
goto nla_put_failure;
- if (region->port)
- if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX,
- region->port->index))
+ if (region->port) {
+ err = nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX,
+ region->port->index);
+ if (err)
goto nla_put_failure;
+ }
err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->ops->name);
if (err)
if (err)
goto out_cancel_msg;
- if (region->port)
- if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX,
- region->port->index))
+ if (region->port) {
+ err = nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX,
+ region->port->index);
+ if (err)
goto out_cancel_msg;
+ }
err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
region->ops->name);
index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
port = devlink_port_get_by_index(devlink, index);
- if (!port)
- return -ENODEV;
+ if (!port) {
+ err = -ENODEV;
+ goto out_unlock;
+ }
}
region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
if (err)
goto nla_put_failure;
- if (region->port)
- if (nla_put_u32(skb, DEVLINK_ATTR_PORT_INDEX,
- region->port->index))
+ if (region->port) {
+ err = nla_put_u32(skb, DEVLINK_ATTR_PORT_INDEX,
+ region->port->index);
+ if (err)
goto nla_put_failure;
+ }
err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
if (err)
return true;
if (tcp_rmem_pressure(sk))
return true;
+ if (tcp_receive_window(tp) <= inet_csk(sk)->icsk_ack.rcv_mss)
+ return true;
}
if (sk->sk_prot->stream_memory_read)
return sk->sk_prot->stream_memory_read(sk);
int avail = tp->rcv_nxt - tp->copied_seq;
if (avail < sk->sk_rcvlowat && !tcp_rmem_pressure(sk) &&
- !sock_flag(sk, SOCK_DONE))
+ !sock_flag(sk, SOCK_DONE) &&
+ tcp_receive_window(tp) > inet_csk(sk)->icsk_ack.rcv_mss)
return;
sk->sk_data_ready(sk);
skb_ext_reset(skb);
skb_orphan(skb);
+ /* try to fetch required memory from subflow */
+ if (!sk_rmem_schedule(sk, skb, skb->truesize)) {
+ if (ssk->sk_forward_alloc < skb->truesize)
+ goto drop;
+ __sk_mem_reclaim(ssk, skb->truesize);
+ if (!sk_rmem_schedule(sk, skb, skb->truesize))
+ goto drop;
+ }
+
/* the skb map_seq accounts for the skb offset:
* mptcp_subflow_get_mapped_dsn() is based on the current tp->copied_seq
* value
* will retransmit as needed, if needed.
*/
MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_DUPDATA);
+drop:
mptcp_drop(sk, skb);
return false;
}
rds_ib_cm_fill_conn_param(conn, &conn_param, &dp,
conn->c_proposed_version,
UINT_MAX, UINT_MAX, isv6);
- ret = rdma_connect(cm_id, &conn_param);
+ ret = rdma_connect_locked(cm_id, &conn_param);
if (ret)
- rds_ib_conn_error(conn, "rdma_connect failed (%d)\n", ret);
+ rds_ib_conn_error(conn, "rdma_connect_locked failed (%d)\n",
+ ret);
out:
/* Beware - returning non-zero tells the rdma_cm to destroy
module_init(mpls_init_module);
module_exit(mpls_cleanup_module);
+MODULE_SOFTDEP("post: mpls_gso");
MODULE_AUTHOR("Netronome Systems <oss-drivers@netronome.com>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("MPLS manipulation actions");
block_cb->indr.binder_type,
&block->flow_block, tcf_block_shared(block),
&extack);
+ rtnl_lock();
down_write(&block->cb_lock);
list_del(&block_cb->driver_list);
list_move(&block_cb->list, &bo.cb_list);
- up_write(&block->cb_lock);
- rtnl_lock();
tcf_block_unbind(block, &bo);
+ up_write(&block->cb_lock);
rtnl_unlock();
}
/* default uniform distribution */
if (dist == NULL)
- return ((rnd % (2 * sigma)) + mu) - sigma;
+ return ((rnd % (2 * (u32)sigma)) + mu) - sigma;
t = dist->table[rnd % dist->size];
x = (sigma % NETEM_DIST_SCALE) * t;
q->slot_config.max_packets = INT_MAX;
if (q->slot_config.max_bytes == 0)
q->slot_config.max_bytes = INT_MAX;
+
+ /* capping dist_jitter to the range acceptable by tabledist() */
+ q->slot_config.dist_jitter = min_t(__s64, INT_MAX, abs(q->slot_config.dist_jitter));
+
q->slot.packets_left = q->slot_config.max_packets;
q->slot.bytes_left = q->slot_config.max_bytes;
if (q->slot_config.min_delay | q->slot_config.max_delay |
if (tb[TCA_NETEM_SLOT])
get_slot(q, tb[TCA_NETEM_SLOT]);
+ /* capping jitter to the range acceptable by tabledist() */
+ q->jitter = min_t(s64, abs(q->jitter), INT_MAX);
+
return ret;
get_table_failure:
/* listen worker: decline and fall back if possible */
static void smc_listen_decline(struct smc_sock *new_smc, int reason_code,
- struct smc_init_info *ini, u8 version)
+ int local_first, u8 version)
{
/* RDMA setup failed, switch back to TCP */
- if (ini->first_contact_local)
+ if (local_first)
smc_lgr_cleanup_early(&new_smc->conn);
else
smc_conn_free(&new_smc->conn);
out_unlock:
mutex_unlock(&smc_server_lgr_pending);
out_decl:
- smc_listen_decline(new_smc, rc, ini, version);
+ smc_listen_decline(new_smc, rc, ini ? ini->first_contact_local : 0,
+ version);
out_free:
kfree(ini);
kfree(buf);
struct smc_clnt_opts_area_hdr hdr;
u8 roce[16]; /* RoCEv2 GID */
u8 reserved[16];
- u8 user_eids[0][SMC_MAX_EID_LEN];
+ u8 user_eids[][SMC_MAX_EID_LEN];
};
struct smc_clc_msg_proposal_prefix { /* prefix part of clc proposal message*/
struct smc_clc_smcd_v2_extension {
u8 system_eid[SMC_MAX_EID_LEN];
u8 reserved[16];
- struct smc_clc_smcd_gid_chid gidchid[0];
+ struct smc_clc_smcd_gid_chid gidchid[];
};
struct smc_clc_msg_proposal { /* clc proposal message sent by Linux */
rc = smc_ism_register_dmb(lgr, bufsize, buf_desc);
if (rc) {
kfree(buf_desc);
- return (rc == -ENOMEM) ? ERR_PTR(-EAGAIN) :
- ERR_PTR(-EIO);
+ if (rc == -ENOMEM)
+ return ERR_PTR(-EAGAIN);
+ if (rc == -ENOSPC)
+ return ERR_PTR(-ENOSPC);
+ return ERR_PTR(-EIO);
}
buf_desc->pages = virt_to_page(buf_desc->cpu_addr);
/* CDC header stored in buf. So, pretend it was smaller */
if (fragid == FIRST_FRAGMENT) {
if (unlikely(head))
goto err;
- if (skb_cloned(frag))
- frag = skb_copy(frag, GFP_ATOMIC);
+ *buf = NULL;
+ frag = skb_unshare(frag, GFP_ATOMIC);
if (unlikely(!frag))
goto err;
head = *headbuf = frag;
- *buf = NULL;
TIPC_SKB_CB(head)->tail = NULL;
if (skb_is_nonlinear(head)) {
skb_walk_frags(head, tail) {
vsk->buffer_min_size = psk->buffer_min_size;
vsk->buffer_max_size = psk->buffer_max_size;
} else {
- vsk->trusted = capable(CAP_NET_ADMIN);
+ vsk->trusted = ns_capable_noaudit(&init_user_ns, CAP_NET_ADMIN);
vsk->owner = get_current_cred();
vsk->connect_timeout = VSOCK_DEFAULT_CONNECT_TIMEOUT;
vsk->buffer_size = VSOCK_DEFAULT_BUFFER_SIZE;
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-mpssd
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0
-ifndef CROSS_COMPILE
-uname_M := $(shell uname -m 2>/dev/null || echo not)
-ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
-
-ifeq ($(ARCH),x86)
-
-PROGS := mpssd
-CC = $(CROSS_COMPILE)gcc
-CFLAGS := -I../../../usr/include -I../../../tools/include
-
-ifdef DEBUG
-CFLAGS += -DDEBUG=$(DEBUG)
-endif
-
-all: $(PROGS)
-mpssd: mpssd.c sysfs.c
- $(CC) $(CFLAGS) mpssd.c sysfs.c -o mpssd -lpthread
-
-install:
- install mpssd /usr/sbin/mpssd
- install micctrl /usr/sbin/micctrl
-
-clean:
- rm -fr $(PROGS)
-
-endif
-endif
+++ /dev/null
-#!/bin/bash
-# SPDX-License-Identifier: GPL-2.0-only
-# Intel MIC Platform Software Stack (MPSS)
-#
-# Copyright(c) 2013 Intel Corporation.
-#
-# Intel MIC User Space Tools.
-#
-# micctrl - Controls MIC boot/start/stop.
-#
-# chkconfig: 2345 95 05
-# description: start MPSS stack processing.
-#
-### BEGIN INIT INFO
-# Provides: micctrl
-### END INIT INFO
-
-# Source function library.
-. /etc/init.d/functions
-
-sysfs="/sys/class/mic"
-
-_status()
-{
- f=$sysfs/$1
- echo -e $1 state: "`cat $f/state`" shutdown_status: "`cat $f/shutdown_status`"
-}
-
-status()
-{
- if [ "`echo $1 | head -c3`" == "mic" ]; then
- _status $1
- return $?
- fi
- for f in $sysfs/*
- do
- _status `basename $f`
- RETVAL=$?
- [ $RETVAL -ne 0 ] && return $RETVAL
- done
- return 0
-}
-
-_reset()
-{
- f=$sysfs/$1
- echo reset > $f/state
-}
-
-reset()
-{
- if [ "`echo $1 | head -c3`" == "mic" ]; then
- _reset $1
- return $?
- fi
- for f in $sysfs/*
- do
- _reset `basename $f`
- RETVAL=$?
- [ $RETVAL -ne 0 ] && return $RETVAL
- done
- return 0
-}
-
-_boot()
-{
- f=$sysfs/$1
- echo "linux" > $f/bootmode
- echo "mic/uos.img" > $f/firmware
- echo "mic/$1.image" > $f/ramdisk
- echo "boot" > $f/state
-}
-
-boot()
-{
- if [ "`echo $1 | head -c3`" == "mic" ]; then
- _boot $1
- return $?
- fi
- for f in $sysfs/*
- do
- _boot `basename $f`
- RETVAL=$?
- [ $RETVAL -ne 0 ] && return $RETVAL
- done
- return 0
-}
-
-_shutdown()
-{
- f=$sysfs/$1
- echo shutdown > $f/state
-}
-
-shutdown()
-{
- if [ "`echo $1 | head -c3`" == "mic" ]; then
- _shutdown $1
- return $?
- fi
- for f in $sysfs/*
- do
- _shutdown `basename $f`
- RETVAL=$?
- [ $RETVAL -ne 0 ] && return $RETVAL
- done
- return 0
-}
-
-_wait()
-{
- f=$sysfs/$1
- while [ "`cat $f/state`" != "offline" -a "`cat $f/state`" != "online" ]
- do
- sleep 1
- echo -e "Waiting for $1 to go offline"
- done
-}
-
-wait()
-{
- if [ "`echo $1 | head -c3`" == "mic" ]; then
- _wait $1
- return $?
- fi
- # Wait for the cards to go offline
- for f in $sysfs/*
- do
- _wait `basename $f`
- RETVAL=$?
- [ $RETVAL -ne 0 ] && return $RETVAL
- done
- return 0
-}
-
-if [ ! -d "$sysfs" ]; then
- echo -e $"Module unloaded "
- exit 3
-fi
-
-case $1 in
- -s)
- status $2
- ;;
- -r)
- reset $2
- ;;
- -b)
- boot $2
- ;;
- -S)
- shutdown $2
- ;;
- -w)
- wait $2
- ;;
- *)
- echo $"Usage: $0 {-s (status) |-r (reset) |-b (boot) |-S (shutdown) |-w (wait)}"
- exit 2
-esac
-
-exit $?
+++ /dev/null
-#!/bin/bash
-# SPDX-License-Identifier: GPL-2.0-only
-# Intel MIC Platform Software Stack (MPSS)
-#
-# Copyright(c) 2013 Intel Corporation.
-#
-# Intel MIC User Space Tools.
-#
-# mpss Start mpssd.
-#
-# chkconfig: 2345 95 05
-# description: start MPSS stack processing.
-#
-### BEGIN INIT INFO
-# Provides: mpss
-# Required-Start:
-# Required-Stop:
-# Short-Description: MPSS stack control
-# Description: MPSS stack control
-### END INIT INFO
-
-# Source function library.
-. /etc/init.d/functions
-
-exec=/usr/sbin/mpssd
-sysfs="/sys/class/mic"
-mic_modules="mic_host mic_x100_dma scif vop"
-
-start()
-{
- [ -x $exec ] || exit 5
-
- if [ "`ps -e | awk '{print $4}' | grep mpssd | head -1`" = "mpssd" ]; then
- echo -e $"MPSSD already running! "
- success
- echo
- return 0
- fi
-
- echo -e $"Starting MPSS Stack"
- echo -e $"Loading MIC drivers:" $mic_modules
-
- modprobe -a $mic_modules
- RETVAL=$?
- if [ $RETVAL -ne 0 ]; then
- failure
- echo
- return $RETVAL
- fi
-
- # Start the daemon
- echo -n $"Starting MPSSD "
- $exec
- RETVAL=$?
- if [ $RETVAL -ne 0 ]; then
- failure
- echo
- return $RETVAL
- fi
- success
- echo
-
- sleep 5
-
- # Boot the cards
- micctrl -b
-
- # Wait till ping works
- for f in $sysfs/*
- do
- count=100
- ipaddr=`cat $f/cmdline`
- ipaddr=${ipaddr#*address,}
- ipaddr=`echo $ipaddr | cut -d, -f1 | cut -d\; -f1`
- while [ $count -ge 0 ]
- do
- echo -e "Pinging "`basename $f`" "
- ping -c 1 $ipaddr &> /dev/null
- RETVAL=$?
- if [ $RETVAL -eq 0 ]; then
- success
- break
- fi
- sleep 1
- count=`expr $count - 1`
- done
- [ $RETVAL -ne 0 ] && failure || success
- echo
- done
- return $RETVAL
-}
-
-stop()
-{
- echo -e $"Shutting down MPSS Stack: "
-
- # Bail out if module is unloaded
- if [ ! -d "$sysfs" ]; then
- echo -n $"Module unloaded "
- success
- echo
- return 0
- fi
-
- # Shut down the cards.
- micctrl -S
-
- # Wait for the cards to go offline
- for f in $sysfs/*
- do
- while [ "`cat $f/state`" != "ready" ]
- do
- sleep 1
- echo -e "Waiting for "`basename $f`" to become ready"
- done
- done
-
- # Display the status of the cards
- micctrl -s
-
- # Kill MPSSD now
- echo -n $"Killing MPSSD"
- killall -9 mpssd 2>/dev/null
- RETVAL=$?
- [ $RETVAL -ne 0 ] && failure || success
- echo
- return $RETVAL
-}
-
-restart()
-{
- stop
- sleep 5
- start
-}
-
-status()
-{
- micctrl -s
- if [ "`ps -e | awk '{print $4}' | grep mpssd | head -n 1`" = "mpssd" ]; then
- echo "mpssd is running"
- else
- echo "mpssd is stopped"
- fi
- return 0
-}
-
-unload()
-{
- if [ ! -d "$sysfs" ]; then
- echo -n $"No MIC_HOST Module: "
- success
- echo
- return
- fi
-
- stop
-
- sleep 5
- echo -n $"Removing MIC drivers:" $mic_modules
- modprobe -r $mic_modules
- RETVAL=$?
- [ $RETVAL -ne 0 ] && failure || success
- echo
- return $RETVAL
-}
-
-case $1 in
- start)
- start
- ;;
- stop)
- stop
- ;;
- restart)
- restart
- ;;
- status)
- status
- ;;
- unload)
- unload
- ;;
- *)
- echo $"Usage: $0 {start|stop|restart|status|unload}"
- exit 2
-esac
-
-exit $?
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Intel MIC User Space Tools.
- */
-
-#define _GNU_SOURCE
-
-#include <stdlib.h>
-#include <fcntl.h>
-#include <getopt.h>
-#include <assert.h>
-#include <unistd.h>
-#include <stdbool.h>
-#include <signal.h>
-#include <poll.h>
-#include <features.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <sys/socket.h>
-#include <linux/virtio_ring.h>
-#include <linux/virtio_net.h>
-#include <linux/virtio_console.h>
-#include <linux/virtio_blk.h>
-#include <linux/version.h>
-#include "mpssd.h"
-#include <linux/mic_ioctl.h>
-#include <linux/mic_common.h>
-#include <tools/endian.h>
-
-static void *init_mic(void *arg);
-
-static FILE *logfp;
-static struct mic_info mic_list;
-
-#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
-
-#define min_t(type, x, y) ({ \
- type __min1 = (x); \
- type __min2 = (y); \
- __min1 < __min2 ? __min1 : __min2; })
-
-/* align addr on a size boundary - adjust address up/down if needed */
-#define _ALIGN_DOWN(addr, size) ((addr)&(~((size)-1)))
-#define _ALIGN_UP(addr, size) _ALIGN_DOWN(addr + size - 1, size)
-
-/* align addr on a size boundary - adjust address up if needed */
-#define _ALIGN(addr, size) _ALIGN_UP(addr, size)
-
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr) _ALIGN(addr, PAGE_SIZE)
-
-#define READ_ONCE(x) (*(volatile typeof(x) *)&(x))
-
-#define GSO_ENABLED 1
-#define MAX_GSO_SIZE (64 * 1024)
-#define ETH_H_LEN 14
-#define MAX_NET_PKT_SIZE (_ALIGN_UP(MAX_GSO_SIZE + ETH_H_LEN, 64))
-#define MIC_DEVICE_PAGE_END 0x1000
-
-#ifndef VIRTIO_NET_HDR_F_DATA_VALID
-#define VIRTIO_NET_HDR_F_DATA_VALID 2 /* Csum is valid */
-#endif
-
-static struct {
- struct mic_device_desc dd;
- struct mic_vqconfig vqconfig[2];
- __u32 host_features, guest_acknowledgements;
- struct virtio_console_config cons_config;
-} virtcons_dev_page = {
- .dd = {
- .type = VIRTIO_ID_CONSOLE,
- .num_vq = ARRAY_SIZE(virtcons_dev_page.vqconfig),
- .feature_len = sizeof(virtcons_dev_page.host_features),
- .config_len = sizeof(virtcons_dev_page.cons_config),
- },
- .vqconfig[0] = {
- .num = htole16(MIC_VRING_ENTRIES),
- },
- .vqconfig[1] = {
- .num = htole16(MIC_VRING_ENTRIES),
- },
-};
-
-static struct {
- struct mic_device_desc dd;
- struct mic_vqconfig vqconfig[2];
- __u32 host_features, guest_acknowledgements;
- struct virtio_net_config net_config;
-} virtnet_dev_page = {
- .dd = {
- .type = VIRTIO_ID_NET,
- .num_vq = ARRAY_SIZE(virtnet_dev_page.vqconfig),
- .feature_len = sizeof(virtnet_dev_page.host_features),
- .config_len = sizeof(virtnet_dev_page.net_config),
- },
- .vqconfig[0] = {
- .num = htole16(MIC_VRING_ENTRIES),
- },
- .vqconfig[1] = {
- .num = htole16(MIC_VRING_ENTRIES),
- },
-#if GSO_ENABLED
- .host_features = htole32(
- 1 << VIRTIO_NET_F_CSUM |
- 1 << VIRTIO_NET_F_GSO |
- 1 << VIRTIO_NET_F_GUEST_TSO4 |
- 1 << VIRTIO_NET_F_GUEST_TSO6 |
- 1 << VIRTIO_NET_F_GUEST_ECN),
-#else
- .host_features = 0,
-#endif
-};
-
-static const char *mic_config_dir = "/etc/mpss";
-static const char *virtblk_backend = "VIRTBLK_BACKEND";
-static struct {
- struct mic_device_desc dd;
- struct mic_vqconfig vqconfig[1];
- __u32 host_features, guest_acknowledgements;
- struct virtio_blk_config blk_config;
-} virtblk_dev_page = {
- .dd = {
- .type = VIRTIO_ID_BLOCK,
- .num_vq = ARRAY_SIZE(virtblk_dev_page.vqconfig),
- .feature_len = sizeof(virtblk_dev_page.host_features),
- .config_len = sizeof(virtblk_dev_page.blk_config),
- },
- .vqconfig[0] = {
- .num = htole16(MIC_VRING_ENTRIES),
- },
- .host_features =
- htole32(1<<VIRTIO_BLK_F_SEG_MAX),
- .blk_config = {
- .seg_max = htole32(MIC_VRING_ENTRIES - 2),
- .capacity = htole64(0),
- }
-};
-
-static char *myname;
-
-static int
-tap_configure(struct mic_info *mic, char *dev)
-{
- pid_t pid;
- char *ifargv[7];
- char ipaddr[IFNAMSIZ];
- int ret = 0;
-
- pid = fork();
- if (pid == 0) {
- ifargv[0] = "ip";
- ifargv[1] = "link";
- ifargv[2] = "set";
- ifargv[3] = dev;
- ifargv[4] = "up";
- ifargv[5] = NULL;
- mpsslog("Configuring %s\n", dev);
- ret = execvp("ip", ifargv);
- if (ret < 0) {
- mpsslog("%s execvp failed errno %s\n",
- mic->name, strerror(errno));
- return ret;
- }
- }
- if (pid < 0) {
- mpsslog("%s fork failed errno %s\n",
- mic->name, strerror(errno));
- return ret;
- }
-
- ret = waitpid(pid, NULL, 0);
- if (ret < 0) {
- mpsslog("%s waitpid failed errno %s\n",
- mic->name, strerror(errno));
- return ret;
- }
-
- snprintf(ipaddr, IFNAMSIZ, "172.31.%d.254/24", mic->id + 1);
-
- pid = fork();
- if (pid == 0) {
- ifargv[0] = "ip";
- ifargv[1] = "addr";
- ifargv[2] = "add";
- ifargv[3] = ipaddr;
- ifargv[4] = "dev";
- ifargv[5] = dev;
- ifargv[6] = NULL;
- mpsslog("Configuring %s ipaddr %s\n", dev, ipaddr);
- ret = execvp("ip", ifargv);
- if (ret < 0) {
- mpsslog("%s execvp failed errno %s\n",
- mic->name, strerror(errno));
- return ret;
- }
- }
- if (pid < 0) {
- mpsslog("%s fork failed errno %s\n",
- mic->name, strerror(errno));
- return ret;
- }
-
- ret = waitpid(pid, NULL, 0);
- if (ret < 0) {
- mpsslog("%s waitpid failed errno %s\n",
- mic->name, strerror(errno));
- return ret;
- }
- mpsslog("MIC name %s %s %d DONE!\n",
- mic->name, __func__, __LINE__);
- return 0;
-}
-
-static int tun_alloc(struct mic_info *mic, char *dev)
-{
- struct ifreq ifr;
- int fd, err;
-#if GSO_ENABLED
- unsigned offload;
-#endif
- fd = open("/dev/net/tun", O_RDWR);
- if (fd < 0) {
- mpsslog("Could not open /dev/net/tun %s\n", strerror(errno));
- goto done;
- }
-
- memset(&ifr, 0, sizeof(ifr));
-
- ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_VNET_HDR;
- if (*dev)
- strncpy(ifr.ifr_name, dev, IFNAMSIZ);
-
- err = ioctl(fd, TUNSETIFF, (void *)&ifr);
- if (err < 0) {
- mpsslog("%s %s %d TUNSETIFF failed %s\n",
- mic->name, __func__, __LINE__, strerror(errno));
- close(fd);
- return err;
- }
-#if GSO_ENABLED
- offload = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6 | TUN_F_TSO_ECN;
-
- err = ioctl(fd, TUNSETOFFLOAD, offload);
- if (err < 0) {
- mpsslog("%s %s %d TUNSETOFFLOAD failed %s\n",
- mic->name, __func__, __LINE__, strerror(errno));
- close(fd);
- return err;
- }
-#endif
- strcpy(dev, ifr.ifr_name);
- mpsslog("Created TAP %s\n", dev);
-done:
- return fd;
-}
-
-#define NET_FD_VIRTIO_NET 0
-#define NET_FD_TUN 1
-#define MAX_NET_FD 2
-
-static void set_dp(struct mic_info *mic, int type, void *dp)
-{
- switch (type) {
- case VIRTIO_ID_CONSOLE:
- mic->mic_console.console_dp = dp;
- return;
- case VIRTIO_ID_NET:
- mic->mic_net.net_dp = dp;
- return;
- case VIRTIO_ID_BLOCK:
- mic->mic_virtblk.block_dp = dp;
- return;
- }
- mpsslog("%s %s %d not found\n", mic->name, __func__, type);
- assert(0);
-}
-
-static void *get_dp(struct mic_info *mic, int type)
-{
- switch (type) {
- case VIRTIO_ID_CONSOLE:
- return mic->mic_console.console_dp;
- case VIRTIO_ID_NET:
- return mic->mic_net.net_dp;
- case VIRTIO_ID_BLOCK:
- return mic->mic_virtblk.block_dp;
- }
- mpsslog("%s %s %d not found\n", mic->name, __func__, type);
- assert(0);
- return NULL;
-}
-
-static struct mic_device_desc *get_device_desc(struct mic_info *mic, int type)
-{
- struct mic_device_desc *d;
- int i;
- void *dp = get_dp(mic, type);
-
- for (i = sizeof(struct mic_bootparam); i < PAGE_SIZE;
- i += mic_total_desc_size(d)) {
- d = dp + i;
-
- /* End of list */
- if (d->type == 0)
- break;
-
- if (d->type == -1)
- continue;
-
- mpsslog("%s %s d-> type %d d %p\n",
- mic->name, __func__, d->type, d);
-
- if (d->type == (__u8)type)
- return d;
- }
- mpsslog("%s %s %d not found\n", mic->name, __func__, type);
- return NULL;
-}
-
-/* See comments in vhost.c for explanation of next_desc() */
-static unsigned next_desc(struct vring_desc *desc)
-{
- unsigned int next;
-
- if (!(le16toh(desc->flags) & VRING_DESC_F_NEXT))
- return -1U;
- next = le16toh(desc->next);
- return next;
-}
-
-/* Sum up all the IOVEC length */
-static ssize_t
-sum_iovec_len(struct mic_copy_desc *copy)
-{
- ssize_t sum = 0;
- unsigned int i;
-
- for (i = 0; i < copy->iovcnt; i++)
- sum += copy->iov[i].iov_len;
- return sum;
-}
-
-static inline void verify_out_len(struct mic_info *mic,
- struct mic_copy_desc *copy)
-{
- if (copy->out_len != sum_iovec_len(copy)) {
- mpsslog("%s %s %d BUG copy->out_len 0x%x len 0x%zx\n",
- mic->name, __func__, __LINE__,
- copy->out_len, sum_iovec_len(copy));
- assert(copy->out_len == sum_iovec_len(copy));
- }
-}
-
-/* Display an iovec */
-static void
-disp_iovec(struct mic_info *mic, struct mic_copy_desc *copy,
- const char *s, int line)
-{
- unsigned int i;
-
- for (i = 0; i < copy->iovcnt; i++)
- mpsslog("%s %s %d copy->iov[%d] addr %p len 0x%zx\n",
- mic->name, s, line, i,
- copy->iov[i].iov_base, copy->iov[i].iov_len);
-}
-
-static inline __u16 read_avail_idx(struct mic_vring *vr)
-{
- return READ_ONCE(vr->info->avail_idx);
-}
-
-static inline void txrx_prepare(int type, bool tx, struct mic_vring *vr,
- struct mic_copy_desc *copy, ssize_t len)
-{
- copy->vr_idx = tx ? 0 : 1;
- copy->update_used = true;
- if (type == VIRTIO_ID_NET)
- copy->iov[1].iov_len = len - sizeof(struct virtio_net_hdr);
- else
- copy->iov[0].iov_len = len;
-}
-
-/* Central API which triggers the copies */
-static int
-mic_virtio_copy(struct mic_info *mic, int fd,
- struct mic_vring *vr, struct mic_copy_desc *copy)
-{
- int ret;
-
- ret = ioctl(fd, MIC_VIRTIO_COPY_DESC, copy);
- if (ret) {
- mpsslog("%s %s %d errno %s ret %d\n",
- mic->name, __func__, __LINE__,
- strerror(errno), ret);
- }
- return ret;
-}
-
-static inline unsigned _vring_size(unsigned int num, unsigned long align)
-{
- return _ALIGN_UP(((sizeof(struct vring_desc) * num + sizeof(__u16) * (3 + num)
- + align - 1) & ~(align - 1))
- + sizeof(__u16) * 3 + sizeof(struct vring_used_elem) * num, 4);
-}
-
-/*
- * This initialization routine requires at least one
- * vring i.e. vr0. vr1 is optional.
- */
-static void *
-init_vr(struct mic_info *mic, int fd, int type,
- struct mic_vring *vr0, struct mic_vring *vr1, int num_vq)
-{
- int vr_size;
- char *va;
-
- vr_size = PAGE_ALIGN(_vring_size(MIC_VRING_ENTRIES,
- MIC_VIRTIO_RING_ALIGN) +
- sizeof(struct _mic_vring_info));
- va = mmap(NULL, MIC_DEVICE_PAGE_END + vr_size * num_vq,
- PROT_READ, MAP_SHARED, fd, 0);
- if (MAP_FAILED == va) {
- mpsslog("%s %s %d mmap failed errno %s\n",
- mic->name, __func__, __LINE__,
- strerror(errno));
- goto done;
- }
- set_dp(mic, type, va);
- vr0->va = (struct mic_vring *)&va[MIC_DEVICE_PAGE_END];
- vr0->info = vr0->va +
- _vring_size(MIC_VRING_ENTRIES, MIC_VIRTIO_RING_ALIGN);
- vring_init(&vr0->vr,
- MIC_VRING_ENTRIES, vr0->va, MIC_VIRTIO_RING_ALIGN);
- mpsslog("%s %s vr0 %p vr0->info %p vr_size 0x%x vring 0x%x ",
- __func__, mic->name, vr0->va, vr0->info, vr_size,
- _vring_size(MIC_VRING_ENTRIES, MIC_VIRTIO_RING_ALIGN));
- mpsslog("magic 0x%x expected 0x%x\n",
- le32toh(vr0->info->magic), MIC_MAGIC + type);
- assert(le32toh(vr0->info->magic) == MIC_MAGIC + type);
- if (vr1) {
- vr1->va = (struct mic_vring *)
- &va[MIC_DEVICE_PAGE_END + vr_size];
- vr1->info = vr1->va + _vring_size(MIC_VRING_ENTRIES,
- MIC_VIRTIO_RING_ALIGN);
- vring_init(&vr1->vr,
- MIC_VRING_ENTRIES, vr1->va, MIC_VIRTIO_RING_ALIGN);
- mpsslog("%s %s vr1 %p vr1->info %p vr_size 0x%x vring 0x%x ",
- __func__, mic->name, vr1->va, vr1->info, vr_size,
- _vring_size(MIC_VRING_ENTRIES, MIC_VIRTIO_RING_ALIGN));
- mpsslog("magic 0x%x expected 0x%x\n",
- le32toh(vr1->info->magic), MIC_MAGIC + type + 1);
- assert(le32toh(vr1->info->magic) == MIC_MAGIC + type + 1);
- }
-done:
- return va;
-}
-
-static int
-wait_for_card_driver(struct mic_info *mic, int fd, int type)
-{
- struct pollfd pollfd;
- int err;
- struct mic_device_desc *desc = get_device_desc(mic, type);
- __u8 prev_status;
-
- if (!desc)
- return -ENODEV;
- prev_status = desc->status;
- pollfd.fd = fd;
- mpsslog("%s %s Waiting .... desc-> type %d status 0x%x\n",
- mic->name, __func__, type, desc->status);
-
- while (1) {
- pollfd.events = POLLIN;
- pollfd.revents = 0;
- err = poll(&pollfd, 1, -1);
- if (err < 0) {
- mpsslog("%s %s poll failed %s\n",
- mic->name, __func__, strerror(errno));
- continue;
- }
-
- if (pollfd.revents) {
- if (desc->status != prev_status) {
- mpsslog("%s %s Waiting... desc-> type %d "
- "status 0x%x\n",
- mic->name, __func__, type,
- desc->status);
- prev_status = desc->status;
- }
- if (desc->status & VIRTIO_CONFIG_S_DRIVER_OK) {
- mpsslog("%s %s poll.revents %d\n",
- mic->name, __func__, pollfd.revents);
- mpsslog("%s %s desc-> type %d status 0x%x\n",
- mic->name, __func__, type,
- desc->status);
- break;
- }
- }
- }
- return 0;
-}
-
-/* Spin till we have some descriptors */
-static void
-spin_for_descriptors(struct mic_info *mic, struct mic_vring *vr)
-{
- __u16 avail_idx = read_avail_idx(vr);
-
- while (avail_idx == le16toh(READ_ONCE(vr->vr.avail->idx))) {
-#ifdef DEBUG
- mpsslog("%s %s waiting for desc avail %d info_avail %d\n",
- mic->name, __func__,
- le16toh(vr->vr.avail->idx), vr->info->avail_idx);
-#endif
- sched_yield();
- }
-}
-
-static void *
-virtio_net(void *arg)
-{
- static __u8 vnet_hdr[2][sizeof(struct virtio_net_hdr)];
- static __u8 vnet_buf[2][MAX_NET_PKT_SIZE] __attribute__ ((aligned(64)));
- struct iovec vnet_iov[2][2] = {
- { { .iov_base = vnet_hdr[0], .iov_len = sizeof(vnet_hdr[0]) },
- { .iov_base = vnet_buf[0], .iov_len = sizeof(vnet_buf[0]) } },
- { { .iov_base = vnet_hdr[1], .iov_len = sizeof(vnet_hdr[1]) },
- { .iov_base = vnet_buf[1], .iov_len = sizeof(vnet_buf[1]) } },
- };
- struct iovec *iov0 = vnet_iov[0], *iov1 = vnet_iov[1];
- struct mic_info *mic = (struct mic_info *)arg;
- char if_name[IFNAMSIZ];
- struct pollfd net_poll[MAX_NET_FD];
- struct mic_vring tx_vr, rx_vr;
- struct mic_copy_desc copy;
- struct mic_device_desc *desc;
- int err;
-
- snprintf(if_name, IFNAMSIZ, "mic%d", mic->id);
- mic->mic_net.tap_fd = tun_alloc(mic, if_name);
- if (mic->mic_net.tap_fd < 0)
- goto done;
-
- if (tap_configure(mic, if_name))
- goto done;
- mpsslog("MIC name %s id %d\n", mic->name, mic->id);
-
- net_poll[NET_FD_VIRTIO_NET].fd = mic->mic_net.virtio_net_fd;
- net_poll[NET_FD_VIRTIO_NET].events = POLLIN;
- net_poll[NET_FD_TUN].fd = mic->mic_net.tap_fd;
- net_poll[NET_FD_TUN].events = POLLIN;
-
- if (MAP_FAILED == init_vr(mic, mic->mic_net.virtio_net_fd,
- VIRTIO_ID_NET, &tx_vr, &rx_vr,
- virtnet_dev_page.dd.num_vq)) {
- mpsslog("%s init_vr failed %s\n",
- mic->name, strerror(errno));
- goto done;
- }
-
- copy.iovcnt = 2;
- desc = get_device_desc(mic, VIRTIO_ID_NET);
-
- while (1) {
- ssize_t len;
-
- net_poll[NET_FD_VIRTIO_NET].revents = 0;
- net_poll[NET_FD_TUN].revents = 0;
-
- /* Start polling for data from tap and virtio net */
- err = poll(net_poll, 2, -1);
- if (err < 0) {
- mpsslog("%s poll failed %s\n",
- __func__, strerror(errno));
- continue;
- }
- if (!(desc->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
- err = wait_for_card_driver(mic,
- mic->mic_net.virtio_net_fd,
- VIRTIO_ID_NET);
- if (err) {
- mpsslog("%s %s %d Exiting...\n",
- mic->name, __func__, __LINE__);
- break;
- }
- }
- /*
- * Check if there is data to be read from TUN and write to
- * virtio net fd if there is.
- */
- if (net_poll[NET_FD_TUN].revents & POLLIN) {
- copy.iov = iov0;
- len = readv(net_poll[NET_FD_TUN].fd,
- copy.iov, copy.iovcnt);
- if (len > 0) {
- struct virtio_net_hdr *hdr
- = (struct virtio_net_hdr *)vnet_hdr[0];
-
- /* Disable checksums on the card since we are on
- a reliable PCIe link */
- hdr->flags |= VIRTIO_NET_HDR_F_DATA_VALID;
-#ifdef DEBUG
- mpsslog("%s %s %d hdr->flags 0x%x ", mic->name,
- __func__, __LINE__, hdr->flags);
- mpsslog("copy.out_len %d hdr->gso_type 0x%x\n",
- copy.out_len, hdr->gso_type);
-#endif
-#ifdef DEBUG
- disp_iovec(mic, ©, __func__, __LINE__);
- mpsslog("%s %s %d read from tap 0x%lx\n",
- mic->name, __func__, __LINE__,
- len);
-#endif
- spin_for_descriptors(mic, &tx_vr);
- txrx_prepare(VIRTIO_ID_NET, 1, &tx_vr, ©,
- len);
-
- err = mic_virtio_copy(mic,
- mic->mic_net.virtio_net_fd, &tx_vr,
- ©);
- if (err < 0) {
- mpsslog("%s %s %d mic_virtio_copy %s\n",
- mic->name, __func__, __LINE__,
- strerror(errno));
- }
- if (!err)
- verify_out_len(mic, ©);
-#ifdef DEBUG
- disp_iovec(mic, ©, __func__, __LINE__);
- mpsslog("%s %s %d wrote to net 0x%lx\n",
- mic->name, __func__, __LINE__,
- sum_iovec_len(©));
-#endif
- /* Reinitialize IOV for next run */
- iov0[1].iov_len = MAX_NET_PKT_SIZE;
- } else if (len < 0) {
- disp_iovec(mic, ©, __func__, __LINE__);
- mpsslog("%s %s %d read failed %s ", mic->name,
- __func__, __LINE__, strerror(errno));
- mpsslog("cnt %d sum %zd\n",
- copy.iovcnt, sum_iovec_len(©));
- }
- }
-
- /*
- * Check if there is data to be read from virtio net and
- * write to TUN if there is.
- */
- if (net_poll[NET_FD_VIRTIO_NET].revents & POLLIN) {
- while (rx_vr.info->avail_idx !=
- le16toh(rx_vr.vr.avail->idx)) {
- copy.iov = iov1;
- txrx_prepare(VIRTIO_ID_NET, 0, &rx_vr, ©,
- MAX_NET_PKT_SIZE
- + sizeof(struct virtio_net_hdr));
-
- err = mic_virtio_copy(mic,
- mic->mic_net.virtio_net_fd, &rx_vr,
- ©);
- if (!err) {
-#ifdef DEBUG
- struct virtio_net_hdr *hdr
- = (struct virtio_net_hdr *)
- vnet_hdr[1];
-
- mpsslog("%s %s %d hdr->flags 0x%x, ",
- mic->name, __func__, __LINE__,
- hdr->flags);
- mpsslog("out_len %d gso_type 0x%x\n",
- copy.out_len,
- hdr->gso_type);
-#endif
- /* Set the correct output iov_len */
- iov1[1].iov_len = copy.out_len -
- sizeof(struct virtio_net_hdr);
- verify_out_len(mic, ©);
-#ifdef DEBUG
- disp_iovec(mic, ©, __func__,
- __LINE__);
- mpsslog("%s %s %d ",
- mic->name, __func__, __LINE__);
- mpsslog("read from net 0x%lx\n",
- sum_iovec_len(©));
-#endif
- len = writev(net_poll[NET_FD_TUN].fd,
- copy.iov, copy.iovcnt);
- if (len != sum_iovec_len(©)) {
- mpsslog("Tun write failed %s ",
- strerror(errno));
- mpsslog("len 0x%zx ", len);
- mpsslog("read_len 0x%zx\n",
- sum_iovec_len(©));
- } else {
-#ifdef DEBUG
- disp_iovec(mic, ©, __func__,
- __LINE__);
- mpsslog("%s %s %d ",
- mic->name, __func__,
- __LINE__);
- mpsslog("wrote to tap 0x%lx\n",
- len);
-#endif
- }
- } else {
- mpsslog("%s %s %d mic_virtio_copy %s\n",
- mic->name, __func__, __LINE__,
- strerror(errno));
- break;
- }
- }
- }
- if (net_poll[NET_FD_VIRTIO_NET].revents & POLLERR)
- mpsslog("%s: %s: POLLERR\n", __func__, mic->name);
- }
-done:
- pthread_exit(NULL);
-}
-
-/* virtio_console */
-#define VIRTIO_CONSOLE_FD 0
-#define MONITOR_FD (VIRTIO_CONSOLE_FD + 1)
-#define MAX_CONSOLE_FD (MONITOR_FD + 1) /* must be the last one + 1 */
-#define MAX_BUFFER_SIZE PAGE_SIZE
-
-static void *
-virtio_console(void *arg)
-{
- static __u8 vcons_buf[2][PAGE_SIZE];
- struct iovec vcons_iov[2] = {
- { .iov_base = vcons_buf[0], .iov_len = sizeof(vcons_buf[0]) },
- { .iov_base = vcons_buf[1], .iov_len = sizeof(vcons_buf[1]) },
- };
- struct iovec *iov0 = &vcons_iov[0], *iov1 = &vcons_iov[1];
- struct mic_info *mic = (struct mic_info *)arg;
- int err;
- struct pollfd console_poll[MAX_CONSOLE_FD];
- int pty_fd;
- char *pts_name;
- ssize_t len;
- struct mic_vring tx_vr, rx_vr;
- struct mic_copy_desc copy;
- struct mic_device_desc *desc;
-
- pty_fd = posix_openpt(O_RDWR);
- if (pty_fd < 0) {
- mpsslog("can't open a pseudoterminal master device: %s\n",
- strerror(errno));
- goto _return;
- }
- pts_name = ptsname(pty_fd);
- if (pts_name == NULL) {
- mpsslog("can't get pts name\n");
- goto _close_pty;
- }
- printf("%s console message goes to %s\n", mic->name, pts_name);
- mpsslog("%s console message goes to %s\n", mic->name, pts_name);
- err = grantpt(pty_fd);
- if (err < 0) {
- mpsslog("can't grant access: %s %s\n",
- pts_name, strerror(errno));
- goto _close_pty;
- }
- err = unlockpt(pty_fd);
- if (err < 0) {
- mpsslog("can't unlock a pseudoterminal: %s %s\n",
- pts_name, strerror(errno));
- goto _close_pty;
- }
- console_poll[MONITOR_FD].fd = pty_fd;
- console_poll[MONITOR_FD].events = POLLIN;
-
- console_poll[VIRTIO_CONSOLE_FD].fd = mic->mic_console.virtio_console_fd;
- console_poll[VIRTIO_CONSOLE_FD].events = POLLIN;
-
- if (MAP_FAILED == init_vr(mic, mic->mic_console.virtio_console_fd,
- VIRTIO_ID_CONSOLE, &tx_vr, &rx_vr,
- virtcons_dev_page.dd.num_vq)) {
- mpsslog("%s init_vr failed %s\n",
- mic->name, strerror(errno));
- goto _close_pty;
- }
-
- copy.iovcnt = 1;
- desc = get_device_desc(mic, VIRTIO_ID_CONSOLE);
-
- for (;;) {
- console_poll[MONITOR_FD].revents = 0;
- console_poll[VIRTIO_CONSOLE_FD].revents = 0;
- err = poll(console_poll, MAX_CONSOLE_FD, -1);
- if (err < 0) {
- mpsslog("%s %d: poll failed: %s\n", __func__, __LINE__,
- strerror(errno));
- continue;
- }
- if (!(desc->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
- err = wait_for_card_driver(mic,
- mic->mic_console.virtio_console_fd,
- VIRTIO_ID_CONSOLE);
- if (err) {
- mpsslog("%s %s %d Exiting...\n",
- mic->name, __func__, __LINE__);
- break;
- }
- }
-
- if (console_poll[MONITOR_FD].revents & POLLIN) {
- copy.iov = iov0;
- len = readv(pty_fd, copy.iov, copy.iovcnt);
- if (len > 0) {
-#ifdef DEBUG
- disp_iovec(mic, ©, __func__, __LINE__);
- mpsslog("%s %s %d read from tap 0x%lx\n",
- mic->name, __func__, __LINE__,
- len);
-#endif
- spin_for_descriptors(mic, &tx_vr);
- txrx_prepare(VIRTIO_ID_CONSOLE, 1, &tx_vr,
- ©, len);
-
- err = mic_virtio_copy(mic,
- mic->mic_console.virtio_console_fd,
- &tx_vr, ©);
- if (err < 0) {
- mpsslog("%s %s %d mic_virtio_copy %s\n",
- mic->name, __func__, __LINE__,
- strerror(errno));
- }
- if (!err)
- verify_out_len(mic, ©);
-#ifdef DEBUG
- disp_iovec(mic, ©, __func__, __LINE__);
- mpsslog("%s %s %d wrote to net 0x%lx\n",
- mic->name, __func__, __LINE__,
- sum_iovec_len(©));
-#endif
- /* Reinitialize IOV for next run */
- iov0->iov_len = PAGE_SIZE;
- } else if (len < 0) {
- disp_iovec(mic, ©, __func__, __LINE__);
- mpsslog("%s %s %d read failed %s ",
- mic->name, __func__, __LINE__,
- strerror(errno));
- mpsslog("cnt %d sum %zd\n",
- copy.iovcnt, sum_iovec_len(©));
- }
- }
-
- if (console_poll[VIRTIO_CONSOLE_FD].revents & POLLIN) {
- while (rx_vr.info->avail_idx !=
- le16toh(rx_vr.vr.avail->idx)) {
- copy.iov = iov1;
- txrx_prepare(VIRTIO_ID_CONSOLE, 0, &rx_vr,
- ©, PAGE_SIZE);
-
- err = mic_virtio_copy(mic,
- mic->mic_console.virtio_console_fd,
- &rx_vr, ©);
- if (!err) {
- /* Set the correct output iov_len */
- iov1->iov_len = copy.out_len;
- verify_out_len(mic, ©);
-#ifdef DEBUG
- disp_iovec(mic, ©, __func__,
- __LINE__);
- mpsslog("%s %s %d ",
- mic->name, __func__, __LINE__);
- mpsslog("read from net 0x%lx\n",
- sum_iovec_len(©));
-#endif
- len = writev(pty_fd,
- copy.iov, copy.iovcnt);
- if (len != sum_iovec_len(©)) {
- mpsslog("Tun write failed %s ",
- strerror(errno));
- mpsslog("len 0x%zx ", len);
- mpsslog("read_len 0x%zx\n",
- sum_iovec_len(©));
- } else {
-#ifdef DEBUG
- disp_iovec(mic, ©, __func__,
- __LINE__);
- mpsslog("%s %s %d ",
- mic->name, __func__,
- __LINE__);
- mpsslog("wrote to tap 0x%lx\n",
- len);
-#endif
- }
- } else {
- mpsslog("%s %s %d mic_virtio_copy %s\n",
- mic->name, __func__, __LINE__,
- strerror(errno));
- break;
- }
- }
- }
- if (console_poll[NET_FD_VIRTIO_NET].revents & POLLERR)
- mpsslog("%s: %s: POLLERR\n", __func__, mic->name);
- }
-_close_pty:
- close(pty_fd);
-_return:
- pthread_exit(NULL);
-}
-
-static void
-add_virtio_device(struct mic_info *mic, struct mic_device_desc *dd)
-{
- char path[PATH_MAX];
- int fd, err;
-
- snprintf(path, PATH_MAX, "/dev/vop_virtio%d", mic->id);
- fd = open(path, O_RDWR);
- if (fd < 0) {
- mpsslog("Could not open %s %s\n", path, strerror(errno));
- return;
- }
-
- err = ioctl(fd, MIC_VIRTIO_ADD_DEVICE, dd);
- if (err < 0) {
- mpsslog("Could not add %d %s\n", dd->type, strerror(errno));
- close(fd);
- return;
- }
- switch (dd->type) {
- case VIRTIO_ID_NET:
- mic->mic_net.virtio_net_fd = fd;
- mpsslog("Added VIRTIO_ID_NET for %s\n", mic->name);
- break;
- case VIRTIO_ID_CONSOLE:
- mic->mic_console.virtio_console_fd = fd;
- mpsslog("Added VIRTIO_ID_CONSOLE for %s\n", mic->name);
- break;
- case VIRTIO_ID_BLOCK:
- mic->mic_virtblk.virtio_block_fd = fd;
- mpsslog("Added VIRTIO_ID_BLOCK for %s\n", mic->name);
- break;
- }
-}
-
-static bool
-set_backend_file(struct mic_info *mic)
-{
- FILE *config;
- char buff[PATH_MAX], *line, *evv, *p;
-
- snprintf(buff, PATH_MAX, "%s/mpssd%03d.conf", mic_config_dir, mic->id);
- config = fopen(buff, "r");
- if (config == NULL)
- return false;
- do { /* look for "virtblk_backend=XXXX" */
- line = fgets(buff, PATH_MAX, config);
- if (line == NULL)
- break;
- if (*line == '#')
- continue;
- p = strchr(line, '\n');
- if (p)
- *p = '\0';
- } while (strncmp(line, virtblk_backend, strlen(virtblk_backend)) != 0);
- fclose(config);
- if (line == NULL)
- return false;
- evv = strchr(line, '=');
- if (evv == NULL)
- return false;
- mic->mic_virtblk.backend_file = malloc(strlen(evv) + 1);
- if (mic->mic_virtblk.backend_file == NULL) {
- mpsslog("%s %d can't allocate memory\n", mic->name, mic->id);
- return false;
- }
- strcpy(mic->mic_virtblk.backend_file, evv + 1);
- return true;
-}
-
-#define SECTOR_SIZE 512
-static bool
-set_backend_size(struct mic_info *mic)
-{
- mic->mic_virtblk.backend_size = lseek(mic->mic_virtblk.backend, 0,
- SEEK_END);
- if (mic->mic_virtblk.backend_size < 0) {
- mpsslog("%s: can't seek: %s\n",
- mic->name, mic->mic_virtblk.backend_file);
- return false;
- }
- virtblk_dev_page.blk_config.capacity =
- mic->mic_virtblk.backend_size / SECTOR_SIZE;
- if ((mic->mic_virtblk.backend_size % SECTOR_SIZE) != 0)
- virtblk_dev_page.blk_config.capacity++;
-
- virtblk_dev_page.blk_config.capacity =
- htole64(virtblk_dev_page.blk_config.capacity);
-
- return true;
-}
-
-static bool
-open_backend(struct mic_info *mic)
-{
- if (!set_backend_file(mic))
- goto _error_exit;
- mic->mic_virtblk.backend = open(mic->mic_virtblk.backend_file, O_RDWR);
- if (mic->mic_virtblk.backend < 0) {
- mpsslog("%s: can't open: %s\n", mic->name,
- mic->mic_virtblk.backend_file);
- goto _error_free;
- }
- if (!set_backend_size(mic))
- goto _error_close;
- mic->mic_virtblk.backend_addr = mmap(NULL,
- mic->mic_virtblk.backend_size,
- PROT_READ|PROT_WRITE, MAP_SHARED,
- mic->mic_virtblk.backend, 0L);
- if (mic->mic_virtblk.backend_addr == MAP_FAILED) {
- mpsslog("%s: can't map: %s %s\n",
- mic->name, mic->mic_virtblk.backend_file,
- strerror(errno));
- goto _error_close;
- }
- return true;
-
- _error_close:
- close(mic->mic_virtblk.backend);
- _error_free:
- free(mic->mic_virtblk.backend_file);
- _error_exit:
- return false;
-}
-
-static void
-close_backend(struct mic_info *mic)
-{
- munmap(mic->mic_virtblk.backend_addr, mic->mic_virtblk.backend_size);
- close(mic->mic_virtblk.backend);
- free(mic->mic_virtblk.backend_file);
-}
-
-static bool
-start_virtblk(struct mic_info *mic, struct mic_vring *vring)
-{
- if (((unsigned long)&virtblk_dev_page.blk_config % 8) != 0) {
- mpsslog("%s: blk_config is not 8 byte aligned.\n",
- mic->name);
- return false;
- }
- add_virtio_device(mic, &virtblk_dev_page.dd);
- if (MAP_FAILED == init_vr(mic, mic->mic_virtblk.virtio_block_fd,
- VIRTIO_ID_BLOCK, vring, NULL,
- virtblk_dev_page.dd.num_vq)) {
- mpsslog("%s init_vr failed %s\n",
- mic->name, strerror(errno));
- return false;
- }
- return true;
-}
-
-static void
-stop_virtblk(struct mic_info *mic)
-{
- int vr_size, ret;
-
- vr_size = PAGE_ALIGN(_vring_size(MIC_VRING_ENTRIES,
- MIC_VIRTIO_RING_ALIGN) +
- sizeof(struct _mic_vring_info));
- ret = munmap(mic->mic_virtblk.block_dp,
- MIC_DEVICE_PAGE_END + vr_size * virtblk_dev_page.dd.num_vq);
- if (ret < 0)
- mpsslog("%s munmap errno %d\n", mic->name, errno);
- close(mic->mic_virtblk.virtio_block_fd);
-}
-
-static __u8
-header_error_check(struct vring_desc *desc)
-{
- if (le32toh(desc->len) != sizeof(struct virtio_blk_outhdr)) {
- mpsslog("%s() %d: length is not sizeof(virtio_blk_outhd)\n",
- __func__, __LINE__);
- return -EIO;
- }
- if (!(le16toh(desc->flags) & VRING_DESC_F_NEXT)) {
- mpsslog("%s() %d: alone\n",
- __func__, __LINE__);
- return -EIO;
- }
- if (le16toh(desc->flags) & VRING_DESC_F_WRITE) {
- mpsslog("%s() %d: not read\n",
- __func__, __LINE__);
- return -EIO;
- }
- return 0;
-}
-
-static int
-read_header(int fd, struct virtio_blk_outhdr *hdr, __u32 desc_idx)
-{
- struct iovec iovec;
- struct mic_copy_desc copy;
-
- iovec.iov_len = sizeof(*hdr);
- iovec.iov_base = hdr;
- copy.iov = &iovec;
- copy.iovcnt = 1;
- copy.vr_idx = 0; /* only one vring on virtio_block */
- copy.update_used = false; /* do not update used index */
- return ioctl(fd, MIC_VIRTIO_COPY_DESC, ©);
-}
-
-static int
-transfer_blocks(int fd, struct iovec *iovec, __u32 iovcnt)
-{
- struct mic_copy_desc copy;
-
- copy.iov = iovec;
- copy.iovcnt = iovcnt;
- copy.vr_idx = 0; /* only one vring on virtio_block */
- copy.update_used = false; /* do not update used index */
- return ioctl(fd, MIC_VIRTIO_COPY_DESC, ©);
-}
-
-static __u8
-status_error_check(struct vring_desc *desc)
-{
- if (le32toh(desc->len) != sizeof(__u8)) {
- mpsslog("%s() %d: length is not sizeof(status)\n",
- __func__, __LINE__);
- return -EIO;
- }
- return 0;
-}
-
-static int
-write_status(int fd, __u8 *status)
-{
- struct iovec iovec;
- struct mic_copy_desc copy;
-
- iovec.iov_base = status;
- iovec.iov_len = sizeof(*status);
- copy.iov = &iovec;
- copy.iovcnt = 1;
- copy.vr_idx = 0; /* only one vring on virtio_block */
- copy.update_used = true; /* Update used index */
- return ioctl(fd, MIC_VIRTIO_COPY_DESC, ©);
-}
-
-#ifndef VIRTIO_BLK_T_GET_ID
-#define VIRTIO_BLK_T_GET_ID 8
-#endif
-
-static void *
-virtio_block(void *arg)
-{
- struct mic_info *mic = (struct mic_info *)arg;
- int ret;
- struct pollfd block_poll;
- struct mic_vring vring;
- __u16 avail_idx;
- __u32 desc_idx;
- struct vring_desc *desc;
- struct iovec *iovec, *piov;
- __u8 status;
- __u32 buffer_desc_idx;
- struct virtio_blk_outhdr hdr;
- void *fos;
-
- for (;;) { /* forever */
- if (!open_backend(mic)) { /* No virtblk */
- for (mic->mic_virtblk.signaled = 0;
- !mic->mic_virtblk.signaled;)
- sleep(1);
- continue;
- }
-
- /* backend file is specified. */
- if (!start_virtblk(mic, &vring))
- goto _close_backend;
- iovec = malloc(sizeof(*iovec) *
- le32toh(virtblk_dev_page.blk_config.seg_max));
- if (!iovec) {
- mpsslog("%s: can't alloc iovec: %s\n",
- mic->name, strerror(ENOMEM));
- goto _stop_virtblk;
- }
-
- block_poll.fd = mic->mic_virtblk.virtio_block_fd;
- block_poll.events = POLLIN;
- for (mic->mic_virtblk.signaled = 0;
- !mic->mic_virtblk.signaled;) {
- block_poll.revents = 0;
- /* timeout in 1 sec to see signaled */
- ret = poll(&block_poll, 1, 1000);
- if (ret < 0) {
- mpsslog("%s %d: poll failed: %s\n",
- __func__, __LINE__,
- strerror(errno));
- continue;
- }
-
- if (!(block_poll.revents & POLLIN)) {
-#ifdef DEBUG
- mpsslog("%s %d: block_poll.revents=0x%x\n",
- __func__, __LINE__, block_poll.revents);
-#endif
- continue;
- }
-
- /* POLLIN */
- while (vring.info->avail_idx !=
- le16toh(vring.vr.avail->idx)) {
- /* read header element */
- avail_idx =
- vring.info->avail_idx &
- (vring.vr.num - 1);
- desc_idx = le16toh(
- vring.vr.avail->ring[avail_idx]);
- desc = &vring.vr.desc[desc_idx];
-#ifdef DEBUG
- mpsslog("%s() %d: avail_idx=%d ",
- __func__, __LINE__,
- vring.info->avail_idx);
- mpsslog("vring.vr.num=%d desc=%p\n",
- vring.vr.num, desc);
-#endif
- status = header_error_check(desc);
- ret = read_header(
- mic->mic_virtblk.virtio_block_fd,
- &hdr, desc_idx);
- if (ret < 0) {
- mpsslog("%s() %d %s: ret=%d %s\n",
- __func__, __LINE__,
- mic->name, ret,
- strerror(errno));
- break;
- }
- /* buffer element */
- piov = iovec;
- status = 0;
- fos = mic->mic_virtblk.backend_addr +
- (hdr.sector * SECTOR_SIZE);
- buffer_desc_idx = next_desc(desc);
- desc_idx = buffer_desc_idx;
- for (desc = &vring.vr.desc[buffer_desc_idx];
- desc->flags & VRING_DESC_F_NEXT;
- desc_idx = next_desc(desc),
- desc = &vring.vr.desc[desc_idx]) {
- piov->iov_len = desc->len;
- piov->iov_base = fos;
- piov++;
- fos += desc->len;
- }
- /* Returning NULLs for VIRTIO_BLK_T_GET_ID. */
- if (hdr.type & ~(VIRTIO_BLK_T_OUT |
- VIRTIO_BLK_T_GET_ID)) {
- /*
- VIRTIO_BLK_T_IN - does not do
- anything. Probably for documenting.
- VIRTIO_BLK_T_SCSI_CMD - for
- virtio_scsi.
- VIRTIO_BLK_T_FLUSH - turned off in
- config space.
- VIRTIO_BLK_T_BARRIER - defined but not
- used in anywhere.
- */
- mpsslog("%s() %d: type %x ",
- __func__, __LINE__,
- hdr.type);
- mpsslog("is not supported\n");
- status = -ENOTSUP;
-
- } else {
- ret = transfer_blocks(
- mic->mic_virtblk.virtio_block_fd,
- iovec,
- piov - iovec);
- if (ret < 0 &&
- status != 0)
- status = ret;
- }
- /* write status and update used pointer */
- if (status != 0)
- status = status_error_check(desc);
- ret = write_status(
- mic->mic_virtblk.virtio_block_fd,
- &status);
-#ifdef DEBUG
- mpsslog("%s() %d: write status=%d on desc=%p\n",
- __func__, __LINE__,
- status, desc);
-#endif
- }
- }
- free(iovec);
-_stop_virtblk:
- stop_virtblk(mic);
-_close_backend:
- close_backend(mic);
- } /* forever */
-
- pthread_exit(NULL);
-}
-
-static void
-reset(struct mic_info *mic)
-{
-#define RESET_TIMEOUT 120
- int i = RESET_TIMEOUT;
- setsysfs(mic->name, "state", "reset");
- while (i) {
- char *state;
- state = readsysfs(mic->name, "state");
- if (!state)
- goto retry;
- mpsslog("%s: %s %d state %s\n",
- mic->name, __func__, __LINE__, state);
-
- if (!strcmp(state, "ready")) {
- free(state);
- break;
- }
- free(state);
-retry:
- sleep(1);
- i--;
- }
-}
-
-static int
-get_mic_shutdown_status(struct mic_info *mic, char *shutdown_status)
-{
- if (!strcmp(shutdown_status, "nop"))
- return MIC_NOP;
- if (!strcmp(shutdown_status, "crashed"))
- return MIC_CRASHED;
- if (!strcmp(shutdown_status, "halted"))
- return MIC_HALTED;
- if (!strcmp(shutdown_status, "poweroff"))
- return MIC_POWER_OFF;
- if (!strcmp(shutdown_status, "restart"))
- return MIC_RESTART;
- mpsslog("%s: BUG invalid status %s\n", mic->name, shutdown_status);
- /* Invalid state */
- assert(0);
-};
-
-static int get_mic_state(struct mic_info *mic)
-{
- char *state = NULL;
- enum mic_states mic_state;
-
- while (!state) {
- state = readsysfs(mic->name, "state");
- sleep(1);
- }
- mpsslog("%s: %s %d state %s\n",
- mic->name, __func__, __LINE__, state);
-
- if (!strcmp(state, "ready")) {
- mic_state = MIC_READY;
- } else if (!strcmp(state, "booting")) {
- mic_state = MIC_BOOTING;
- } else if (!strcmp(state, "online")) {
- mic_state = MIC_ONLINE;
- } else if (!strcmp(state, "shutting_down")) {
- mic_state = MIC_SHUTTING_DOWN;
- } else if (!strcmp(state, "reset_failed")) {
- mic_state = MIC_RESET_FAILED;
- } else if (!strcmp(state, "resetting")) {
- mic_state = MIC_RESETTING;
- } else {
- mpsslog("%s: BUG invalid state %s\n", mic->name, state);
- assert(0);
- }
-
- free(state);
- return mic_state;
-};
-
-static void mic_handle_shutdown(struct mic_info *mic)
-{
-#define SHUTDOWN_TIMEOUT 60
- int i = SHUTDOWN_TIMEOUT;
- char *shutdown_status;
- while (i) {
- shutdown_status = readsysfs(mic->name, "shutdown_status");
- if (!shutdown_status) {
- sleep(1);
- continue;
- }
- mpsslog("%s: %s %d shutdown_status %s\n",
- mic->name, __func__, __LINE__, shutdown_status);
- switch (get_mic_shutdown_status(mic, shutdown_status)) {
- case MIC_RESTART:
- mic->restart = 1;
- case MIC_HALTED:
- case MIC_POWER_OFF:
- case MIC_CRASHED:
- free(shutdown_status);
- goto reset;
- default:
- break;
- }
- free(shutdown_status);
- sleep(1);
- i--;
- }
-reset:
- if (!i)
- mpsslog("%s: %s %d timing out waiting for shutdown_status %s\n",
- mic->name, __func__, __LINE__, shutdown_status);
- reset(mic);
-}
-
-static int open_state_fd(struct mic_info *mic)
-{
- char pathname[PATH_MAX];
- int fd;
-
- snprintf(pathname, PATH_MAX - 1, "%s/%s/%s",
- MICSYSFSDIR, mic->name, "state");
-
- fd = open(pathname, O_RDONLY);
- if (fd < 0)
- mpsslog("%s: opening file %s failed %s\n",
- mic->name, pathname, strerror(errno));
- return fd;
-}
-
-static int block_till_state_change(int fd, struct mic_info *mic)
-{
- struct pollfd ufds[1];
- char value[PAGE_SIZE];
- int ret;
-
- ufds[0].fd = fd;
- ufds[0].events = POLLERR | POLLPRI;
- ret = poll(ufds, 1, -1);
- if (ret < 0) {
- mpsslog("%s: %s %d poll failed %s\n",
- mic->name, __func__, __LINE__, strerror(errno));
- return ret;
- }
-
- ret = lseek(fd, 0, SEEK_SET);
- if (ret < 0) {
- mpsslog("%s: %s %d Failed to seek to 0: %s\n",
- mic->name, __func__, __LINE__, strerror(errno));
- return ret;
- }
-
- ret = read(fd, value, sizeof(value));
- if (ret < 0) {
- mpsslog("%s: %s %d Failed to read sysfs entry: %s\n",
- mic->name, __func__, __LINE__, strerror(errno));
- return ret;
- }
-
- return 0;
-}
-
-static void *
-mic_config(void *arg)
-{
- struct mic_info *mic = (struct mic_info *)arg;
- int fd, ret, stat = 0;
-
- fd = open_state_fd(mic);
- if (fd < 0) {
- mpsslog("%s: %s %d open state fd failed %s\n",
- mic->name, __func__, __LINE__, strerror(errno));
- goto exit;
- }
-
- do {
- ret = block_till_state_change(fd, mic);
- if (ret < 0) {
- mpsslog("%s: %s %d block_till_state_change error %s\n",
- mic->name, __func__, __LINE__, strerror(errno));
- goto close_exit;
- }
-
- switch (get_mic_state(mic)) {
- case MIC_SHUTTING_DOWN:
- mic_handle_shutdown(mic);
- break;
- case MIC_READY:
- case MIC_RESET_FAILED:
- ret = kill(mic->pid, SIGTERM);
- mpsslog("%s: %s %d kill pid %d ret %d\n",
- mic->name, __func__, __LINE__,
- mic->pid, ret);
- if (!ret) {
- ret = waitpid(mic->pid, &stat,
- WIFSIGNALED(stat));
- mpsslog("%s: %s %d waitpid ret %d pid %d\n",
- mic->name, __func__, __LINE__,
- ret, mic->pid);
- }
- if (mic->boot_on_resume) {
- setsysfs(mic->name, "state", "boot");
- mic->boot_on_resume = 0;
- }
- goto close_exit;
- default:
- break;
- }
- } while (1);
-
-close_exit:
- close(fd);
-exit:
- init_mic(mic);
- pthread_exit(NULL);
-}
-
-static void
-set_cmdline(struct mic_info *mic)
-{
- char buffer[PATH_MAX];
- int len;
-
- len = snprintf(buffer, PATH_MAX,
- "clocksource=tsc highres=off nohz=off ");
- len += snprintf(buffer + len, PATH_MAX - len,
- "cpufreq_on;corec6_off;pc3_off;pc6_off ");
- len += snprintf(buffer + len, PATH_MAX - len,
- "ifcfg=static;address,172.31.%d.1;netmask,255.255.255.0",
- mic->id + 1);
-
- setsysfs(mic->name, "cmdline", buffer);
- mpsslog("%s: Command line: \"%s\"\n", mic->name, buffer);
- snprintf(buffer, PATH_MAX, "172.31.%d.1", mic->id + 1);
- mpsslog("%s: IPADDR: \"%s\"\n", mic->name, buffer);
-}
-
-static void
-set_log_buf_info(struct mic_info *mic)
-{
- int fd;
- off_t len;
- char system_map[] = "/lib/firmware/mic/System.map";
- char *map, *temp, log_buf[17] = {'\0'};
-
- fd = open(system_map, O_RDONLY);
- if (fd < 0) {
- mpsslog("%s: Opening System.map failed: %d\n",
- mic->name, errno);
- return;
- }
- len = lseek(fd, 0, SEEK_END);
- if (len < 0) {
- mpsslog("%s: Reading System.map size failed: %d\n",
- mic->name, errno);
- close(fd);
- return;
- }
- map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
- if (map == MAP_FAILED) {
- mpsslog("%s: mmap of System.map failed: %d\n",
- mic->name, errno);
- close(fd);
- return;
- }
- temp = strstr(map, "__log_buf");
- if (!temp) {
- mpsslog("%s: __log_buf not found: %d\n", mic->name, errno);
- munmap(map, len);
- close(fd);
- return;
- }
- strncpy(log_buf, temp - 19, 16);
- setsysfs(mic->name, "log_buf_addr", log_buf);
- mpsslog("%s: log_buf_addr: %s\n", mic->name, log_buf);
- temp = strstr(map, "log_buf_len");
- if (!temp) {
- mpsslog("%s: log_buf_len not found: %d\n", mic->name, errno);
- munmap(map, len);
- close(fd);
- return;
- }
- strncpy(log_buf, temp - 19, 16);
- setsysfs(mic->name, "log_buf_len", log_buf);
- mpsslog("%s: log_buf_len: %s\n", mic->name, log_buf);
- munmap(map, len);
- close(fd);
-}
-
-static void
-change_virtblk_backend(int x, siginfo_t *siginfo, void *p)
-{
- struct mic_info *mic;
-
- for (mic = mic_list.next; mic != NULL; mic = mic->next)
- mic->mic_virtblk.signaled = 1/* true */;
-}
-
-static void
-set_mic_boot_params(struct mic_info *mic)
-{
- set_log_buf_info(mic);
- set_cmdline(mic);
-}
-
-static void *
-init_mic(void *arg)
-{
- struct mic_info *mic = (struct mic_info *)arg;
- struct sigaction ignore = {
- .sa_flags = 0,
- .sa_handler = SIG_IGN
- };
- struct sigaction act = {
- .sa_flags = SA_SIGINFO,
- .sa_sigaction = change_virtblk_backend,
- };
- char buffer[PATH_MAX];
- int err, fd;
-
- /*
- * Currently, one virtio block device is supported for each MIC card
- * at a time. Any user (or test) can send a SIGUSR1 to the MIC daemon.
- * The signal informs the virtio block backend about a change in the
- * configuration file which specifies the virtio backend file name on
- * the host. Virtio block backend then re-reads the configuration file
- * and switches to the new block device. This signalling mechanism may
- * not be required once multiple virtio block devices are supported by
- * the MIC daemon.
- */
- sigaction(SIGUSR1, &ignore, NULL);
-retry:
- fd = open_state_fd(mic);
- if (fd < 0) {
- mpsslog("%s: %s %d open state fd failed %s\n",
- mic->name, __func__, __LINE__, strerror(errno));
- sleep(2);
- goto retry;
- }
-
- if (mic->restart) {
- snprintf(buffer, PATH_MAX, "boot");
- setsysfs(mic->name, "state", buffer);
- mpsslog("%s restarting mic %d\n",
- mic->name, mic->restart);
- mic->restart = 0;
- }
-
- while (1) {
- while (block_till_state_change(fd, mic)) {
- mpsslog("%s: %s %d block_till_state_change error %s\n",
- mic->name, __func__, __LINE__, strerror(errno));
- sleep(2);
- continue;
- }
-
- if (get_mic_state(mic) == MIC_BOOTING)
- break;
- }
-
- mic->pid = fork();
- switch (mic->pid) {
- case 0:
- add_virtio_device(mic, &virtcons_dev_page.dd);
- add_virtio_device(mic, &virtnet_dev_page.dd);
- err = pthread_create(&mic->mic_console.console_thread, NULL,
- virtio_console, mic);
- if (err)
- mpsslog("%s virtcons pthread_create failed %s\n",
- mic->name, strerror(err));
- err = pthread_create(&mic->mic_net.net_thread, NULL,
- virtio_net, mic);
- if (err)
- mpsslog("%s virtnet pthread_create failed %s\n",
- mic->name, strerror(err));
- err = pthread_create(&mic->mic_virtblk.block_thread, NULL,
- virtio_block, mic);
- if (err)
- mpsslog("%s virtblk pthread_create failed %s\n",
- mic->name, strerror(err));
- sigemptyset(&act.sa_mask);
- err = sigaction(SIGUSR1, &act, NULL);
- if (err)
- mpsslog("%s sigaction SIGUSR1 failed %s\n",
- mic->name, strerror(errno));
- while (1)
- sleep(60);
- case -1:
- mpsslog("fork failed MIC name %s id %d errno %d\n",
- mic->name, mic->id, errno);
- break;
- default:
- err = pthread_create(&mic->config_thread, NULL,
- mic_config, mic);
- if (err)
- mpsslog("%s mic_config pthread_create failed %s\n",
- mic->name, strerror(err));
- }
-
- return NULL;
-}
-
-static void
-start_daemon(void)
-{
- struct mic_info *mic;
- int err;
-
- for (mic = mic_list.next; mic; mic = mic->next) {
- set_mic_boot_params(mic);
- err = pthread_create(&mic->init_thread, NULL, init_mic, mic);
- if (err)
- mpsslog("%s init_mic pthread_create failed %s\n",
- mic->name, strerror(err));
- }
-
- while (1)
- sleep(60);
-}
-
-static int
-init_mic_list(void)
-{
- struct mic_info *mic = &mic_list;
- struct dirent *file;
- DIR *dp;
- int cnt = 0;
-
- dp = opendir(MICSYSFSDIR);
- if (!dp)
- return 0;
-
- while ((file = readdir(dp)) != NULL) {
- if (!strncmp(file->d_name, "mic", 3)) {
- mic->next = calloc(1, sizeof(struct mic_info));
- if (mic->next) {
- mic = mic->next;
- mic->id = atoi(&file->d_name[3]);
- mic->name = malloc(strlen(file->d_name) + 16);
- if (mic->name)
- strcpy(mic->name, file->d_name);
- mpsslog("MIC name %s id %d\n", mic->name,
- mic->id);
- cnt++;
- }
- }
- }
-
- closedir(dp);
- return cnt;
-}
-
-void
-mpsslog(char *format, ...)
-{
- va_list args;
- char buffer[4096];
- char ts[52], *ts1;
- time_t t;
-
- if (logfp == NULL)
- return;
-
- va_start(args, format);
- vsprintf(buffer, format, args);
- va_end(args);
-
- time(&t);
- ts1 = ctime_r(&t, ts);
- ts1[strlen(ts1) - 1] = '\0';
- fprintf(logfp, "%s: %s", ts1, buffer);
-
- fflush(logfp);
-}
-
-int
-main(int argc, char *argv[])
-{
- int cnt;
- pid_t pid;
-
- myname = argv[0];
-
- logfp = fopen(LOGFILE_NAME, "a+");
- if (!logfp) {
- fprintf(stderr, "cannot open logfile '%s'\n", LOGFILE_NAME);
- exit(1);
- }
- pid = fork();
- switch (pid) {
- case 0:
- break;
- case -1:
- exit(2);
- default:
- exit(0);
- }
-
- mpsslog("MIC Daemon start\n");
-
- cnt = init_mic_list();
- if (cnt == 0) {
- mpsslog("MIC module not loaded\n");
- exit(3);
- }
- mpsslog("MIC found %d devices\n", cnt);
-
- start_daemon();
-
- exit(0);
-}
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Intel MIC User Space Tools.
- */
-#ifndef _MPSSD_H_
-#define _MPSSD_H_
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <dirent.h>
-#include <libgen.h>
-#include <pthread.h>
-#include <stdarg.h>
-#include <time.h>
-#include <errno.h>
-#include <sys/dir.h>
-#include <sys/ioctl.h>
-#include <sys/poll.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <sys/utsname.h>
-#include <sys/wait.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-#include <signal.h>
-#include <limits.h>
-#include <syslog.h>
-#include <getopt.h>
-#include <net/if.h>
-#include <linux/if_tun.h>
-#include <linux/virtio_ids.h>
-
-#define MICSYSFSDIR "/sys/class/mic"
-#define LOGFILE_NAME "/var/log/mpssd"
-#define PAGE_SIZE 4096
-
-struct mic_console_info {
- pthread_t console_thread;
- int virtio_console_fd;
- void *console_dp;
-};
-
-struct mic_net_info {
- pthread_t net_thread;
- int virtio_net_fd;
- int tap_fd;
- void *net_dp;
-};
-
-struct mic_virtblk_info {
- pthread_t block_thread;
- int virtio_block_fd;
- void *block_dp;
- volatile sig_atomic_t signaled;
- char *backend_file;
- int backend;
- void *backend_addr;
- long backend_size;
-};
-
-struct mic_info {
- int id;
- char *name;
- pthread_t config_thread;
- pthread_t init_thread;
- pid_t pid;
- struct mic_console_info mic_console;
- struct mic_net_info mic_net;
- struct mic_virtblk_info mic_virtblk;
- int restart;
- int boot_on_resume;
- struct mic_info *next;
-};
-
-__attribute__((format(printf, 1, 2)))
-void mpsslog(char *format, ...);
-char *readsysfs(char *dir, char *entry);
-int setsysfs(char *dir, char *entry, char *value);
-#endif
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Intel MIC User Space Tools.
- */
-
-#include "mpssd.h"
-
-#define PAGE_SIZE 4096
-
-char *
-readsysfs(char *dir, char *entry)
-{
- char filename[PATH_MAX];
- char value[PAGE_SIZE];
- char *string = NULL;
- int fd;
- int len;
-
- if (dir == NULL)
- snprintf(filename, PATH_MAX, "%s/%s", MICSYSFSDIR, entry);
- else
- snprintf(filename, PATH_MAX,
- "%s/%s/%s", MICSYSFSDIR, dir, entry);
-
- fd = open(filename, O_RDONLY);
- if (fd < 0) {
- mpsslog("Failed to open sysfs entry '%s': %s\n",
- filename, strerror(errno));
- return NULL;
- }
-
- len = read(fd, value, sizeof(value));
- if (len < 0) {
- mpsslog("Failed to read sysfs entry '%s': %s\n",
- filename, strerror(errno));
- goto readsys_ret;
- }
- if (len == 0)
- goto readsys_ret;
-
- value[len - 1] = '\0';
-
- string = malloc(strlen(value) + 1);
- if (string)
- strcpy(string, value);
-
-readsys_ret:
- close(fd);
- return string;
-}
-
-int
-setsysfs(char *dir, char *entry, char *value)
-{
- char filename[PATH_MAX];
- char *oldvalue;
- int fd, ret = 0;
-
- if (dir == NULL)
- snprintf(filename, PATH_MAX, "%s/%s", MICSYSFSDIR, entry);
- else
- snprintf(filename, PATH_MAX, "%s/%s/%s",
- MICSYSFSDIR, dir, entry);
-
- oldvalue = readsysfs(dir, entry);
-
- fd = open(filename, O_RDWR);
- if (fd < 0) {
- ret = errno;
- mpsslog("Failed to open sysfs entry '%s': %s\n",
- filename, strerror(errno));
- goto done;
- }
-
- if (!oldvalue || strcmp(value, oldvalue)) {
- if (write(fd, value, strlen(value)) < 0) {
- ret = errno;
- mpsslog("Failed to write new sysfs entry '%s': %s\n",
- filename, strerror(errno));
- }
- }
- close(fd);
-done:
- if (oldvalue)
- free(oldvalue);
- return ret;
-}
# SPDX-License-Identifier: GPL-2.0
use strict;
+use warnings;
+use utf8;
use Pod::Usage;
use Getopt::Long;
use File::Find;
use Fcntl ':mode';
-my $help;
-my $man;
-my $debug;
+my $help = 0;
+my $man = 0;
+my $debug = 0;
+my $enable_lineno = 0;
my $prefix="Documentation/ABI";
+#
+# If true, assumes that the description is formatted with ReST
+#
+my $description_is_rst = 1;
+
GetOptions(
"debug|d+" => \$debug,
+ "enable-lineno" => \$enable_lineno,
+ "rst-source!" => \$description_is_rst,
"dir=s" => \$prefix,
'help|?' => \$help,
man => \$man
require Data::Dumper if ($debug);
my %data;
+my %symbols;
#
# Displays an error message, printing file name and line
sub parse_error($$$$) {
my ($file, $ln, $msg, $data) = @_;
- print STDERR "file $file#$ln: $msg at\n\t$data";
+ $data =~ s/\s+$/\n/;
+
+ print STDERR "Warning: file $file#$ln:\n\t$msg";
+
+ if ($data ne "") {
+ print STDERR ". Line\n\t\t$data";
+ } else {
+ print STDERR "\n";
+ }
}
#
my $name = $file;
$name =~ s,.*/,,;
- my $nametag = "File $name";
+ my $fn = $file;
+ $fn =~ s,Documentation/ABI/,,;
+
+ my $nametag = "File $fn";
$data{$nametag}->{what} = "File $name";
$data{$nametag}->{type} = "File";
$data{$nametag}->{file} = $name;
$data{$nametag}->{filepath} = $file;
$data{$nametag}->{is_file} = 1;
+ $data{$nametag}->{line_no} = 1;
my $type = $file;
$type =~ s,.*/(.*)/.*,$1,;
my $what;
my $new_what;
- my $tag;
+ my $tag = "";
my $ln;
my $xrefs;
my $space;
my @labels;
- my $label;
+ my $label = "";
print STDERR "Opening $file\n" if ($debug > 1);
open IN, $file;
# Invalid, but it is a common mistake
if ($new_tag eq "where") {
- parse_error($file, $ln, "tag 'Where' is invalid. Should be 'What:' instead", $_);
+ parse_error($file, $ln, "tag 'Where' is invalid. Should be 'What:' instead", "");
$new_tag = "what";
}
if ($new_tag =~ m/what/) {
$space = "";
+ $content =~ s/[,.;]$//;
+
+ push @{$symbols{$content}->{file}}, " $file:" . ($ln - 1);
+
if ($tag =~ m/what/) {
$what .= ", " . $content;
} else {
- parse_error($file, $ln, "What '$what' doesn't have a description", "") if ($what && !$data{$what}->{description});
+ if ($what) {
+ parse_error($file, $ln, "What '$what' doesn't have a description", "") if (!$data{$what}->{description});
+
+ foreach my $w(split /, /, $what) {
+ $symbols{$w}->{xref} = $what;
+ };
+ }
$what = $content;
$label = $content;
push @labels, [($content, $label)];
$tag = $new_tag;
- push @{$data{$nametag}->{xrefs}}, [($content, $label)] if ($data{$nametag}->{what});
+ push @{$data{$nametag}->{symbols}}, $content if ($data{$nametag}->{what});
next;
}
$tag = $new_tag;
if ($new_what) {
- @{$data{$what}->{label}} = @labels if ($data{$nametag}->{what});
+ @{$data{$what}->{label_list}} = @labels if ($data{$nametag}->{what});
@labels = ();
$label = "";
$new_what = 0;
$data{$what}->{type} = $type;
- $data{$what}->{file} = $name;
- $data{$what}->{filepath} = $file;
+ if (!defined($data{$what}->{file})) {
+ $data{$what}->{file} = $name;
+ $data{$what}->{filepath} = $file;
+ } else {
+ if ($name ne $data{$what}->{file}) {
+ $data{$what}->{file} .= " " . $name;
+ $data{$what}->{filepath} .= " " . $file;
+ }
+ }
print STDERR "\twhat: $what\n" if ($debug > 1);
+ $data{$what}->{line_no} = $ln;
+ } else {
+ $data{$what}->{line_no} = $ln if (!defined($data{$what}->{line_no}));
}
if (!$what) {
parse_error($file, $ln, "'What:' should come first:", $_);
next;
}
- if ($tag eq "description") {
- next if ($content =~ m/^\s*$/);
- if ($content =~ m/^(\s*)(.*)/) {
- my $new_content = $2;
- $space = $new_tag . $sep . $1;
- while ($space =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
- $space =~ s/./ /g;
- $data{$what}->{$tag} .= "$new_content\n";
+ if ($new_tag eq "description") {
+ $sep =~ s,:, ,;
+ $content = ' ' x length($new_tag) . $sep . $content;
+ while ($content =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
+ if ($content =~ m/^(\s*)(\S.*)$/) {
+ # Preserve initial spaces for the first line
+ $space = $1;
+ $content = "$2\n";
+ $data{$what}->{$tag} .= $content;
+ } else {
+ undef($space);
}
+
} else {
$data{$what}->{$tag} = $content;
}
}
if ($tag eq "description") {
- if (!$data{$what}->{description}) {
- next if (m/^\s*\n/);
- if (m/^(\s*)(.*)/) {
+ my $content = $_;
+ while ($content =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
+ if (m/^\s*\n/) {
+ $data{$what}->{$tag} .= "\n";
+ next;
+ }
+
+ if (!defined($space)) {
+ # Preserve initial spaces for the first line
+ if ($content =~ m/^(\s*)(\S.*)$/) {
$space = $1;
- while ($space =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
- $data{$what}->{$tag} .= "$2\n";
+ $content = "$2\n";
}
} else {
- my $content = $_;
- if (m/^\s*\n/) {
- $data{$what}->{$tag} .= $content;
- next;
- }
-
- while ($content =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
$space = "" if (!($content =~ s/^($space)//));
-
- # Compress spaces with tabs
- $content =~ s<^ {8}> <\t>;
- $content =~ s<^ {1,7}\t> <\t>;
- $content =~ s< {1,7}\t> <\t>;
- $data{$what}->{$tag} .= $content;
}
+ $data{$what}->{$tag} .= $content;
+
next;
}
if (m/^\s*(.*)/) {
}
# Everything else is error
- parse_error($file, $ln, "Unexpected line:", $_);
+ parse_error($file, $ln, "Unexpected content", $_);
+ }
+ $data{$nametag}->{description} =~ s/^\n+// if ($data{$nametag}->{description});
+ if ($what) {
+ parse_error($file, $ln, "What '$what' doesn't have a description", "") if (!$data{$what}->{description});
+
+ foreach my $w(split /, /,$what) {
+ $symbols{$w}->{xref} = $what;
+ };
}
- $data{$nametag}->{description} =~ s/^\n+//;
close IN;
}
-#
-# Outputs the book on ReST format
-#
-
-my %labels;
-
-sub output_rest {
- foreach my $what (sort {
- ($data{$a}->{type} eq "File") cmp ($data{$b}->{type} eq "File") ||
- $a cmp $b
- } keys %data) {
- my $type = $data{$what}->{type};
- my $file = $data{$what}->{file};
- my $filepath = $data{$what}->{filepath};
-
- my $w = $what;
- $w =~ s/([\(\)\_\-\*\=\^\~\\])/\\$1/g;
+sub create_labels {
+ my %labels;
+ foreach my $what (keys %data) {
+ next if ($data{$what}->{file} eq "File");
- foreach my $p (@{$data{$what}->{label}}) {
+ foreach my $p (@{$data{$what}->{label_list}}) {
my ($content, $label) = @{$p};
$label = "abi_" . $label . " ";
$label =~ tr/A-Z/a-z/;
}
$labels{$label} = 1;
- $data{$what}->{label} .= $label;
-
- printf ".. _%s:\n\n", $label;
+ $data{$what}->{label} = $label;
# only one label is enough
last;
}
+ }
+}
+#
+# Outputs the book on ReST format
+#
- $filepath =~ s,.*/(.*/.*),\1,;;
- $filepath =~ s,[/\-],_,g;;
- my $fileref = "abi_file_".$filepath;
+# \b doesn't work well with paths. So, we need to define something else
+my $bondary = qr { (?<![\w\/\`\{])(?=[\w\/\`\{])|(?<=[\w\/\`\{])(?![\w\/\`\{]) }x;
- if ($type eq "File") {
- my $bar = $w;
- $bar =~ s/./-/g;
+sub output_rest {
+ create_labels();
- print ".. _$fileref:\n\n";
- print "$w\n$bar\n\n";
- } else {
- my @names = split /\s*,\s*/,$w;
+ foreach my $what (sort {
+ ($data{$a}->{type} eq "File") cmp ($data{$b}->{type} eq "File") ||
+ $a cmp $b
+ } keys %data) {
+ my $type = $data{$what}->{type};
+
+ my @file = split / /, $data{$what}->{file};
+ my @filepath = split / /, $data{$what}->{filepath};
+
+ if ($enable_lineno) {
+ printf "#define LINENO %s%s#%s\n\n",
+ $prefix, $file[0],
+ $data{$what}->{line_no};
+ }
+ my $w = $what;
+ $w =~ s/([\(\)\_\-\*\=\^\~\\])/\\$1/g;
+
+ if ($type ne "File") {
+ printf ".. _%s:\n\n", $data{$what}->{label};
+
+ my @names = split /, /,$w;
my $len = 0;
foreach my $name (@names) {
+ $name = "**$name**";
$len = length($name) if (length($name) > $len);
}
- print "What:\n\n";
-
print "+-" . "-" x $len . "-+\n";
foreach my $name (@names) {
printf "| %s", $name . " " x ($len - length($name)) . " |\n";
print "+-" . "-" x $len . "-+\n";
}
+
print "\n";
}
- print "Defined on file :ref:`$file <$fileref>`\n\n" if ($type ne "File");
+ for (my $i = 0; $i < scalar(@filepath); $i++) {
+ my $path = $filepath[$i];
+ my $f = $file[$i];
- my $desc = $data{$what}->{description};
- $desc =~ s/^\s+//;
+ $path =~ s,.*/(.*/.*),$1,;;
+ $path =~ s,[/\-],_,g;;
+ my $fileref = "abi_file_".$path;
- # Remove title markups from the description, as they won't work
- $desc =~ s/\n[\-\*\=\^\~]+\n/\n/g;
+ if ($type eq "File") {
+ print ".. _$fileref:\n\n";
+ } else {
+ print "Defined on file :ref:`$f <$fileref>`\n\n";
+ }
+ }
+
+ if ($type eq "File") {
+ my $bar = $w;
+ $bar =~ s/./-/g;
+ print "$w\n$bar\n\n";
+ }
+
+ my $desc = "";
+ $desc = $data{$what}->{description} if (defined($data{$what}->{description}));
+ $desc =~ s/\s+$/\n/;
if (!($desc =~ /^\s*$/)) {
- if ($desc =~ m/\:\n/ || $desc =~ m/\n[\t ]+/ || $desc =~ m/[\x00-\x08\x0b-\x1f\x7b-\xff]/) {
- # put everything inside a code block
- $desc =~ s/\n/\n /g;
+ if ($description_is_rst) {
+ # Enrich text by creating cross-references
+
+ $desc =~ s,Documentation/(?!devicetree)(\S+)\.rst,:doc:`/$1`,g;
+
+ my @matches = $desc =~ m,Documentation/ABI/([\w\/\-]+),;
+ foreach my $f (@matches) {
+ my $xref = $f;
+ my $path = $f;
+ $path =~ s,.*/(.*/.*),$1,;;
+ $path =~ s,[/\-],_,g;;
+ $xref .= " <abi_file_" . $path . ">";
+ $desc =~ s,\bDocumentation/ABI/$f\b,:ref:`$xref`,g;
+ }
- print "::\n\n";
- print " $desc\n\n";
- } else {
- # Escape any special chars from description
- $desc =~s/([\x00-\x08\x0b-\x1f\x21-\x2a\x2d\x2f\x3c-\x40\x5c\x5e-\x60\x7b-\xff])/\\$1/g;
+ @matches = $desc =~ m,$bondary(/sys/[^\s\.\,\;\:\*\s\`\'\(\)]+)$bondary,;
+
+ foreach my $s (@matches) {
+ if (defined($data{$s}) && defined($data{$s}->{label})) {
+ my $xref = $s;
+
+ $xref =~ s/([\x00-\x1f\x21-\x2f\x3a-\x40\x7b-\xff])/\\$1/g;
+ $xref = ":ref:`$xref <" . $data{$s}->{label} . ">`";
+
+ $desc =~ s,$bondary$s$bondary,$xref,g;
+ }
+ }
print "$desc\n\n";
+ } else {
+ $desc =~ s/^\s+//;
+
+ # Remove title markups from the description, as they won't work
+ $desc =~ s/\n[\-\*\=\^\~]+\n/\n\n/g;
+
+ if ($desc =~ m/\:\n/ || $desc =~ m/\n[\t ]+/ || $desc =~ m/[\x00-\x08\x0b-\x1f\x7b-\xff]/) {
+ # put everything inside a code block
+ $desc =~ s/\n/\n /g;
+
+ print "::\n\n";
+ print " $desc\n\n";
+ } else {
+ # Escape any special chars from description
+ $desc =~s/([\x00-\x08\x0b-\x1f\x21-\x2a\x2d\x2f\x3c-\x40\x5c\x5e-\x60\x7b-\xff])/\\$1/g;
+ print "$desc\n\n";
+ }
}
} else {
print "DESCRIPTION MISSING for $what\n\n" if (!$data{$what}->{is_file});
}
- if ($data{$what}->{xrefs}) {
+ if ($data{$what}->{symbols}) {
printf "Has the following ABI:\n\n";
- foreach my $p(@{$data{$what}->{xrefs}}) {
- my ($content, $label) = @{$p};
- $label = "abi_" . $label . " ";
- $label =~ tr/A-Z/a-z/;
-
- # Convert special chars to "_"
- $label =~s/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\xff])/_/g;
- $label =~ s,_+,_,g;
- $label =~ s,_$,,;
+ foreach my $content(@{$data{$what}->{symbols}}) {
+ my $label = $data{$symbols{$content}->{xref}}->{label};
# Escape special chars from content
$content =~s/([\x00-\x1f\x21-\x2f\x3a-\x40\x7b-\xff])/\\$1/g;
print "- :ref:`$content <$label>`\n\n";
}
}
+
+ if (defined($data{$what}->{users})) {
+ my $users = $data{$what}->{users};
+
+ $users =~ s/\n/\n\t/g;
+ printf "Users:\n\t%s\n\n", $users if ($users ne "");
+ }
+
}
}
print "\n$what\n$bar\n\n";
- my $kernelversion = $data{$what}->{kernelversion};
- my $contact = $data{$what}->{contact};
- my $users = $data{$what}->{users};
- my $date = $data{$what}->{date};
- my $desc = $data{$what}->{description};
- $kernelversion =~ s/^\s+//;
- $contact =~ s/^\s+//;
- $users =~ s/^\s+//;
- $users =~ s/\n//g;
- $date =~ s/^\s+//;
- $desc =~ s/^\s+//;
+ my $kernelversion = $data{$what}->{kernelversion} if (defined($data{$what}->{kernelversion}));
+ my $contact = $data{$what}->{contact} if (defined($data{$what}->{contact}));
+ my $users = $data{$what}->{users} if (defined($data{$what}->{users}));
+ my $date = $data{$what}->{date} if (defined($data{$what}->{date}));
+ my $desc = $data{$what}->{description} if (defined($data{$what}->{description}));
+
+ $kernelversion =~ s/^\s+// if ($kernelversion);
+ $contact =~ s/^\s+// if ($contact);
+ if ($users) {
+ $users =~ s/^\s+//;
+ $users =~ s/\n//g;
+ }
+ $date =~ s/^\s+// if ($date);
+ $desc =~ s/^\s+// if ($desc);
printf "Kernel version:\t\t%s\n", $kernelversion if ($kernelversion);
printf "Date:\t\t\t%s\n", $date if ($date);
printf "Contact:\t\t%s\n", $contact if ($contact);
printf "Users:\t\t\t%s\n", $users if ($users);
- print "Defined on file:\t$file\n\n";
+ print "Defined on file(s):\t$file\n\n";
print "Description:\n\n$desc";
}
}
+# Ensure that the prefix will always end with a slash
+# While this is not needed for find, it makes the patch nicer
+# with --enable-lineno
+$prefix =~ s,/?$,/,;
#
# Parses all ABI files located at $prefix dir
#
# Handles the command
#
-if ($cmd eq "rest") {
- output_rest;
-} elsif ($cmd eq "search") {
+if ($cmd eq "search") {
search_symbols;
-}
+} else {
+ if ($cmd eq "rest") {
+ output_rest;
+ }
+
+ # Warn about duplicated ABI entries
+ foreach my $what(sort keys %symbols) {
+ my @files = @{$symbols{$what}->{file}};
+ next if (scalar(@files) == 1);
+
+ printf STDERR "Warning: $what is defined %d times: @files\n",
+ scalar(@files);
+ }
+}
__END__
=head1 SYNOPSIS
-B<abi_book.pl> [--debug] [--man] [--help] [--dir=<dir>] <COMAND> [<ARGUMENT>]
+B<abi_book.pl> [--debug] [--enable-lineno] [--man] [--help]
+ [--(no-)rst-source] [--dir=<dir>] <COMAND> [<ARGUMENT>]
Where <COMMAND> can be:
Changes the location of the ABI search. By default, it uses
the Documentation/ABI directory.
+=item B<--rst-source> and B<--no-rst-source>
+
+The input file may be using ReST syntax or not. Those two options allow
+selecting between a rst-compliant source ABI (--rst-source), or a
+plain text that may be violating ReST spec, so it requres some escaping
+logic (--no-rst-source).
+
+=item B<--enable-lineno>
+
+Enable output of #define LINENO lines.
+
=item B<--debug>
Put the script in verbose mode, useful for debugging. Can be called multiple
struct tpm_digest *digests;
struct ima_template_desc *template_desc; /* template descriptor */
u32 template_data_len;
- struct ima_field_data template_data[0]; /* template related data */
+ struct ima_field_data template_data[]; /* template related data */
};
struct ima_queue_entry {
/* Register SIGSEGV handler */
mte_register_signal(SIGSEGV, mte_default_handler);
+ /* Set test plan */
+ ksft_set_plan(20);
+
/* Buffer by byte tests */
evaluate_test(check_buffer_by_byte(USE_MMAP, MTE_SYNC_ERR),
"Check buffer correctness by byte with sync err mode and mmap memory\n");
mte_register_signal(SIGSEGV, mte_default_handler);
mte_register_signal(SIGBUS, mte_default_handler);
+ /* Set test plan */
+ ksft_set_plan(12);
+
evaluate_test(check_child_memory_mapping(USE_MMAP, MTE_SYNC_ERR, MAP_PRIVATE),
"Check child anonymous memory with private mapping, precise mode and mmap memory\n");
evaluate_test(check_child_memory_mapping(USE_MMAP, MTE_SYNC_ERR, MAP_SHARED),
/* Register signal handlers */
mte_register_signal(SIGBUS, mte_default_handler);
mte_register_signal(SIGSEGV, mte_default_handler);
+
+ /* Set test plan */
+ ksft_set_plan(4);
+
/* Enable KSM */
mte_ksm_setup();
mte_register_signal(SIGBUS, mte_default_handler);
mte_register_signal(SIGSEGV, mte_default_handler);
+ /* Set test plan */
+ ksft_set_plan(22);
+
mte_enable_pstate_tco();
+
evaluate_test(check_anonymous_memory_mapping(USE_MMAP, MTE_SYNC_ERR, MAP_PRIVATE, TAG_CHECK_OFF),
"Check anonymous memory with private mapping, sync error mode, mmap memory and tag check off\n");
evaluate_test(check_file_memory_mapping(USE_MPROTECT, MTE_SYNC_ERR, MAP_PRIVATE, TAG_CHECK_OFF),
/* Register SIGSEGV handler */
mte_register_signal(SIGSEGV, mte_default_handler);
+ /* Set test plan */
+ ksft_set_plan(4);
+
evaluate_test(check_single_included_tags(USE_MMAP, MTE_SYNC_ERR),
"Check an included tag value with sync mode\n");
evaluate_test(check_multiple_included_tags(USE_MMAP, MTE_SYNC_ERR),
err = mte_default_setup();
if (err)
return err;
+
/* Register signal handlers */
mte_register_signal(SIGSEGV, mte_default_handler);
+ /* Set test plan */
+ ksft_set_plan(4);
+
evaluate_test(check_usermem_access_fault(USE_MMAP, MTE_SYNC_ERR, MAP_PRIVATE),
"Check memory access from kernel in sync mode, private mapping and mmap memory\n");
evaluate_test(check_usermem_access_fault(USE_MMAP, MTE_SYNC_ERR, MAP_SHARED),
close(ctx.epfd);
}
+struct epoll61_ctx {
+ int epfd;
+ int evfd;
+};
+
+static void *epoll61_write_eventfd(void *ctx_)
+{
+ struct epoll61_ctx *ctx = ctx_;
+ int64_t l = 1;
+
+ usleep(10950);
+ write(ctx->evfd, &l, sizeof(l));
+ return NULL;
+}
+
+static void *epoll61_epoll_with_timeout(void *ctx_)
+{
+ struct epoll61_ctx *ctx = ctx_;
+ struct epoll_event events[1];
+ int n;
+
+ n = epoll_wait(ctx->epfd, events, 1, 11);
+ /*
+ * If epoll returned the eventfd, write on the eventfd to wake up the
+ * blocking poller.
+ */
+ if (n == 1) {
+ int64_t l = 1;
+
+ write(ctx->evfd, &l, sizeof(l));
+ }
+ return NULL;
+}
+
+static void *epoll61_blocking_epoll(void *ctx_)
+{
+ struct epoll61_ctx *ctx = ctx_;
+ struct epoll_event events[1];
+
+ epoll_wait(ctx->epfd, events, 1, -1);
+ return NULL;
+}
+
+TEST(epoll61)
+{
+ struct epoll61_ctx ctx;
+ struct epoll_event ev;
+ int i, r;
+
+ ctx.epfd = epoll_create1(0);
+ ASSERT_GE(ctx.epfd, 0);
+ ctx.evfd = eventfd(0, EFD_NONBLOCK);
+ ASSERT_GE(ctx.evfd, 0);
+
+ ev.events = EPOLLIN | EPOLLET | EPOLLERR | EPOLLHUP;
+ ev.data.ptr = NULL;
+ r = epoll_ctl(ctx.epfd, EPOLL_CTL_ADD, ctx.evfd, &ev);
+ ASSERT_EQ(r, 0);
+
+ /*
+ * We are testing a race. Repeat the test case 1000 times to make it
+ * more likely to fail in case of a bug.
+ */
+ for (i = 0; i < 1000; i++) {
+ pthread_t threads[3];
+ int n;
+
+ /*
+ * Start 3 threads:
+ * Thread 1 sleeps for 10.9ms and writes to the evenfd.
+ * Thread 2 calls epoll with a timeout of 11ms.
+ * Thread 3 calls epoll with a timeout of -1.
+ *
+ * The eventfd write by Thread 1 should either wakeup Thread 2
+ * or Thread 3. If it wakes up Thread 2, Thread 2 writes on the
+ * eventfd to wake up Thread 3.
+ *
+ * If no events are missed, all three threads should eventually
+ * be joinable.
+ */
+ ASSERT_EQ(pthread_create(&threads[0], NULL,
+ epoll61_write_eventfd, &ctx), 0);
+ ASSERT_EQ(pthread_create(&threads[1], NULL,
+ epoll61_epoll_with_timeout, &ctx), 0);
+ ASSERT_EQ(pthread_create(&threads[2], NULL,
+ epoll61_blocking_epoll, &ctx), 0);
+
+ for (n = 0; n < ARRAY_SIZE(threads); ++n)
+ ASSERT_EQ(pthread_join(threads[n], NULL), 0);
+ }
+
+ close(ctx.epfd);
+ close(ctx.evfd);
+}
+
TEST_HARNESS_MAIN
/x86_64/vmx_preemption_timer_test
/x86_64/svm_vmcall_test
/x86_64/sync_regs_test
+/x86_64/vmx_apic_access_test
/x86_64/vmx_close_while_nested_test
/x86_64/vmx_dirty_log_test
/x86_64/vmx_set_nested_state_test
TEST_GEN_PROGS_x86_64 += x86_64/vmx_preemption_timer_test
TEST_GEN_PROGS_x86_64 += x86_64/svm_vmcall_test
TEST_GEN_PROGS_x86_64 += x86_64/sync_regs_test
+TEST_GEN_PROGS_x86_64 += x86_64/vmx_apic_access_test
TEST_GEN_PROGS_x86_64 += x86_64/vmx_close_while_nested_test
TEST_GEN_PROGS_x86_64 += x86_64/vmx_dirty_log_test
TEST_GEN_PROGS_x86_64 += x86_64/vmx_set_nested_state_test
void *eptp_hva;
uint64_t eptp_gpa;
void *eptp;
+
+ void *apic_access_hva;
+ uint64_t apic_access_gpa;
+ void *apic_access;
};
union vmx_basic {
uint32_t memslot, uint32_t eptp_memslot);
void prepare_eptp(struct vmx_pages *vmx, struct kvm_vm *vm,
uint32_t eptp_memslot);
+void prepare_virtualize_apic_accesses(struct vmx_pages *vmx, struct kvm_vm *vm,
+ uint32_t eptp_memslot);
#endif /* SELFTEST_KVM_VMX_H */
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <unistd.h>
#include <linux/kernel.h>
#define KVM_UTIL_PGS_PER_HUGEPG 512
/* As needed perform madvise */
if (src_type == VM_MEM_SRC_ANONYMOUS || src_type == VM_MEM_SRC_ANONYMOUS_THP) {
- ret = madvise(region->host_mem, npages * vm->page_size,
- src_type == VM_MEM_SRC_ANONYMOUS ? MADV_NOHUGEPAGE : MADV_HUGEPAGE);
- TEST_ASSERT(ret == 0, "madvise failed,\n"
- " addr: %p\n"
- " length: 0x%lx\n"
- " src_type: %x",
- region->host_mem, npages * vm->page_size, src_type);
+ struct stat statbuf;
+
+ ret = stat("/sys/kernel/mm/transparent_hugepage", &statbuf);
+ TEST_ASSERT(ret == 0 || (ret == -1 && errno == ENOENT),
+ "stat /sys/kernel/mm/transparent_hugepage");
+
+ TEST_ASSERT(ret == 0 || src_type != VM_MEM_SRC_ANONYMOUS_THP,
+ "VM_MEM_SRC_ANONYMOUS_THP requires THP to be configured in the host kernel");
+
+ if (ret == 0) {
+ ret = madvise(region->host_mem, npages * vm->page_size,
+ src_type == VM_MEM_SRC_ANONYMOUS ? MADV_NOHUGEPAGE : MADV_HUGEPAGE);
+ TEST_ASSERT(ret == 0, "madvise failed, addr: %p length: 0x%lx src_type: %x",
+ region->host_mem, npages * vm->page_size, src_type);
+ }
}
region->unused_phy_pages = sparsebit_alloc();
vmx->eptp_hva = addr_gva2hva(vm, (uintptr_t)vmx->eptp);
vmx->eptp_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->eptp);
}
+
+void prepare_virtualize_apic_accesses(struct vmx_pages *vmx, struct kvm_vm *vm,
+ uint32_t eptp_memslot)
+{
+ vmx->apic_access = (void *)vm_vaddr_alloc(vm, getpagesize(),
+ 0x10000, 0, 0);
+ vmx->apic_access_hva = addr_gva2hva(vm, (uintptr_t)vmx->apic_access);
+ vmx->apic_access_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->apic_access);
+}
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * vmx_apic_access_test
+ *
+ * Copyright (C) 2020, Google LLC.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.
+ *
+ * The first subtest simply checks to see that an L2 guest can be
+ * launched with a valid APIC-access address that is backed by a
+ * page of L1 physical memory.
+ *
+ * The second subtest sets the APIC-access address to a (valid) L1
+ * physical address that is not backed by memory. KVM can't handle
+ * this situation, so resuming L2 should result in a KVM exit for
+ * internal error (emulation). This is not an architectural
+ * requirement. It is just a shortcoming of KVM. The internal error
+ * is unfortunate, but it's better than what used to happen!
+ */
+
+#include "test_util.h"
+#include "kvm_util.h"
+#include "processor.h"
+#include "vmx.h"
+
+#include <string.h>
+#include <sys/ioctl.h>
+
+#include "kselftest.h"
+
+#define VCPU_ID 0
+
+/* The virtual machine object. */
+static struct kvm_vm *vm;
+
+static void l2_guest_code(void)
+{
+ /* Exit to L1 */
+ __asm__ __volatile__("vmcall");
+}
+
+static void l1_guest_code(struct vmx_pages *vmx_pages, unsigned long high_gpa)
+{
+#define L2_GUEST_STACK_SIZE 64
+ unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
+ uint32_t control;
+
+ GUEST_ASSERT(prepare_for_vmx_operation(vmx_pages));
+ GUEST_ASSERT(load_vmcs(vmx_pages));
+
+ /* Prepare the VMCS for L2 execution. */
+ prepare_vmcs(vmx_pages, l2_guest_code,
+ &l2_guest_stack[L2_GUEST_STACK_SIZE]);
+ control = vmreadz(CPU_BASED_VM_EXEC_CONTROL);
+ control |= CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
+ vmwrite(CPU_BASED_VM_EXEC_CONTROL, control);
+ control = vmreadz(SECONDARY_VM_EXEC_CONTROL);
+ control |= SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
+ vmwrite(SECONDARY_VM_EXEC_CONTROL, control);
+ vmwrite(APIC_ACCESS_ADDR, vmx_pages->apic_access_gpa);
+
+ /* Try to launch L2 with the memory-backed APIC-access address. */
+ GUEST_SYNC(vmreadz(APIC_ACCESS_ADDR));
+ GUEST_ASSERT(!vmlaunch());
+ GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_VMCALL);
+
+ vmwrite(APIC_ACCESS_ADDR, high_gpa);
+
+ /* Try to resume L2 with the unbacked APIC-access address. */
+ GUEST_SYNC(vmreadz(APIC_ACCESS_ADDR));
+ GUEST_ASSERT(!vmresume());
+ GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_VMCALL);
+
+ GUEST_DONE();
+}
+
+int main(int argc, char *argv[])
+{
+ unsigned long apic_access_addr = ~0ul;
+ unsigned int paddr_width;
+ unsigned int vaddr_width;
+ vm_vaddr_t vmx_pages_gva;
+ unsigned long high_gpa;
+ struct vmx_pages *vmx;
+ bool done = false;
+
+ nested_vmx_check_supported();
+
+ vm = vm_create_default(VCPU_ID, 0, (void *) l1_guest_code);
+ vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
+
+ kvm_get_cpu_address_width(&paddr_width, &vaddr_width);
+ high_gpa = (1ul << paddr_width) - getpagesize();
+ if ((unsigned long)DEFAULT_GUEST_PHY_PAGES * getpagesize() > high_gpa) {
+ print_skip("No unbacked physical page available");
+ exit(KSFT_SKIP);
+ }
+
+ vmx = vcpu_alloc_vmx(vm, &vmx_pages_gva);
+ prepare_virtualize_apic_accesses(vmx, vm, 0);
+ vcpu_args_set(vm, VCPU_ID, 2, vmx_pages_gva, high_gpa);
+
+ while (!done) {
+ volatile struct kvm_run *run = vcpu_state(vm, VCPU_ID);
+ struct ucall uc;
+
+ vcpu_run(vm, VCPU_ID);
+ if (apic_access_addr == high_gpa) {
+ TEST_ASSERT(run->exit_reason ==
+ KVM_EXIT_INTERNAL_ERROR,
+ "Got exit reason other than KVM_EXIT_INTERNAL_ERROR: %u (%s)\n",
+ run->exit_reason,
+ exit_reason_str(run->exit_reason));
+ TEST_ASSERT(run->internal.suberror ==
+ KVM_INTERNAL_ERROR_EMULATION,
+ "Got internal suberror other than KVM_INTERNAL_ERROR_EMULATION: %u\n",
+ run->internal.suberror);
+ break;
+ }
+ TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
+ "Got exit_reason other than KVM_EXIT_IO: %u (%s)\n",
+ run->exit_reason,
+ exit_reason_str(run->exit_reason));
+
+ switch (get_ucall(vm, VCPU_ID, &uc)) {
+ case UCALL_ABORT:
+ TEST_FAIL("%s at %s:%ld", (const char *)uc.args[0],
+ __FILE__, uc.args[1]);
+ /* NOT REACHED */
+ case UCALL_SYNC:
+ apic_access_addr = uc.args[1];
+ break;
+ case UCALL_DONE:
+ done = true;
+ break;
+ default:
+ TEST_ASSERT(false, "Unknown ucall %lu", uc.cmd);
+ }
+ }
+ kvm_vm_free(vm);
+ return 0;
+}
projects / linux-2.6-microblaze.git / commitdiff