1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Thunderbolt driver - bus logic (NHI independent)
5 * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
6 * Copyright (C) 2018, Intel Corporation
12 #include <linux/nvmem-provider.h>
13 #include <linux/pci.h>
14 #include <linux/thunderbolt.h>
15 #include <linux/uuid.h>
22 * struct tb_switch_nvm - Structure holding switch NVM information
23 * @major: Major version number of the active NVM portion
24 * @minor: Minor version number of the active NVM portion
25 * @id: Identifier used with both NVM portions
26 * @active: Active portion NVMem device
27 * @non_active: Non-active portion NVMem device
28 * @buf: Buffer where the NVM image is stored before it is written to
29 * the actual NVM flash device
30 * @buf_data_size: Number of bytes actually consumed by the new NVM
32 * @authenticating: The switch is authenticating the new NVM
34 struct tb_switch_nvm {
38 struct nvmem_device *active;
39 struct nvmem_device *non_active;
45 #define TB_SWITCH_KEY_SIZE 32
46 #define TB_SWITCH_MAX_DEPTH 6
47 #define USB4_SWITCH_MAX_DEPTH 5
50 * enum tb_switch_tmu_rate - TMU refresh rate
51 * @TB_SWITCH_TMU_RATE_OFF: %0 (Disable Time Sync handshake)
52 * @TB_SWITCH_TMU_RATE_HIFI: %16 us time interval between successive
53 * transmission of the Delay Request TSNOS
54 * (Time Sync Notification Ordered Set) on a Link
55 * @TB_SWITCH_TMU_RATE_NORMAL: %1 ms time interval between successive
56 * transmission of the Delay Request TSNOS on
59 enum tb_switch_tmu_rate {
60 TB_SWITCH_TMU_RATE_OFF = 0,
61 TB_SWITCH_TMU_RATE_HIFI = 16,
62 TB_SWITCH_TMU_RATE_NORMAL = 1000,
66 * struct tb_switch_tmu - Structure holding switch TMU configuration
67 * @cap: Offset to the TMU capability (%0 if not found)
68 * @has_ucap: Does the switch support uni-directional mode
69 * @rate: TMU refresh rate related to upstream switch. In case of root
70 * switch this holds the domain rate.
71 * @unidirectional: Is the TMU in uni-directional or bi-directional mode
72 * related to upstream switch. Don't case for root switch.
74 struct tb_switch_tmu {
77 enum tb_switch_tmu_rate rate;
82 * struct tb_switch - a thunderbolt switch
83 * @dev: Device for the switch
84 * @config: Switch configuration
85 * @ports: Ports in this switch
86 * @dma_port: If the switch has port supporting DMA configuration based
87 * mailbox this will hold the pointer to that (%NULL
88 * otherwise). If set it also means the switch has
90 * @tmu: The switch TMU configuration
91 * @tb: Pointer to the domain the switch belongs to
92 * @uid: Unique ID of the switch
93 * @uuid: UUID of the switch (or %NULL if not supported)
94 * @vendor: Vendor ID of the switch
95 * @device: Device ID of the switch
96 * @vendor_name: Name of the vendor (or %NULL if not known)
97 * @device_name: Name of the device (or %NULL if not known)
98 * @link_speed: Speed of the link in Gb/s
99 * @link_width: Width of the link (1 or 2)
100 * @link_usb4: Upstream link is USB4
101 * @generation: Switch Thunderbolt generation
102 * @cap_plug_events: Offset to the plug events capability (%0 if not found)
103 * @cap_lc: Offset to the link controller capability (%0 if not found)
104 * @is_unplugged: The switch is going away
105 * @drom: DROM of the switch (%NULL if not found)
106 * @nvm: Pointer to the NVM if the switch has one (%NULL otherwise)
107 * @no_nvm_upgrade: Prevent NVM upgrade of this switch
108 * @safe_mode: The switch is in safe-mode
109 * @boot: Whether the switch was already authorized on boot or not
110 * @rpm: The switch supports runtime PM
111 * @authorized: Whether the switch is authorized by user or policy
112 * @security_level: Switch supported security level
113 * @key: Contains the key used to challenge the device or %NULL if not
114 * supported. Size of the key is %TB_SWITCH_KEY_SIZE.
115 * @connection_id: Connection ID used with ICM messaging
116 * @connection_key: Connection key used with ICM messaging
117 * @link: Root switch link this switch is connected (ICM only)
118 * @depth: Depth in the chain this switch is connected (ICM only)
119 * @rpm_complete: Completion used to wait for runtime resume to
120 * complete (ICM only)
122 * When the switch is being added or removed to the domain (other
123 * switches) you need to have domain lock held.
127 struct tb_regs_switch_header config;
128 struct tb_port *ports;
129 struct tb_dma_port *dma_port;
130 struct tb_switch_tmu tmu;
136 const char *vendor_name;
137 const char *device_name;
138 unsigned int link_speed;
139 unsigned int link_width;
141 unsigned int generation;
146 struct tb_switch_nvm *nvm;
151 unsigned int authorized;
152 enum tb_security_level security_level;
158 struct completion rpm_complete;
162 * struct tb_port - a thunderbolt port, part of a tb_switch
163 * @config: Cached port configuration read from registers
164 * @sw: Switch the port belongs to
165 * @remote: Remote port (%NULL if not connected)
166 * @xdomain: Remote host (%NULL if not connected)
167 * @cap_phy: Offset, zero if not found
168 * @cap_tmu: Offset of the adapter specific TMU capability (%0 if not present)
169 * @cap_adap: Offset of the adapter specific capability (%0 if not present)
170 * @cap_usb4: Offset to the USB4 port capability (%0 if not present)
171 * @port: Port number on switch
172 * @disabled: Disabled by eeprom
173 * @bonded: true if the port is bonded (two lanes combined as one)
174 * @dual_link_port: If the switch is connected using two ports, points
176 * @link_nr: Is this primary or secondary port on the dual_link.
177 * @in_hopids: Currently allocated input HopIDs
178 * @out_hopids: Currently allocated output HopIDs
179 * @list: Used to link ports to DP resources list
182 struct tb_regs_port_header config;
183 struct tb_switch *sw;
184 struct tb_port *remote;
185 struct tb_xdomain *xdomain;
193 struct tb_port *dual_link_port;
195 struct ida in_hopids;
196 struct ida out_hopids;
197 struct list_head list;
201 * struct tb_path_hop - routing information for a tb_path
202 * @in_port: Ingress port of a switch
203 * @out_port: Egress port of a switch where the packet is routed out
204 * (must be on the same switch than @in_port)
205 * @in_hop_index: HopID where the path configuration entry is placed in
206 * the path config space of @in_port.
207 * @in_counter_index: Used counter index (not used in the driver
208 * currently, %-1 to disable)
209 * @next_hop_index: HopID of the packet when it is routed out from @out_port
210 * @initial_credits: Number of initial flow control credits allocated for
213 * Hop configuration is always done on the IN port of a switch.
214 * in_port and out_port have to be on the same switch. Packets arriving on
215 * in_port with "hop" = in_hop_index will get routed to through out_port. The
216 * next hop to take (on out_port->remote) is determined by
217 * next_hop_index. When routing packet to another switch (out->remote is
218 * set) the @next_hop_index must match the @in_hop_index of that next
219 * hop to make routing possible.
221 * in_counter_index is the index of a counter (in TB_CFG_COUNTERS) on the in
225 struct tb_port *in_port;
226 struct tb_port *out_port;
228 int in_counter_index;
230 unsigned int initial_credits;
234 * enum tb_path_port - path options mask
235 * @TB_PATH_NONE: Do not activate on any hop on path
236 * @TB_PATH_SOURCE: Activate on the first hop (out of src)
237 * @TB_PATH_INTERNAL: Activate on the intermediate hops (not the first/last)
238 * @TB_PATH_DESTINATION: Activate on the last hop (into dst)
239 * @TB_PATH_ALL: Activate on all hops on the path
244 TB_PATH_INTERNAL = 2,
245 TB_PATH_DESTINATION = 4,
250 * struct tb_path - a unidirectional path between two ports
251 * @tb: Pointer to the domain structure
252 * @name: Name of the path (used for debugging)
253 * @nfc_credits: Number of non flow controlled credits allocated for the path
254 * @ingress_shared_buffer: Shared buffering used for ingress ports on the path
255 * @egress_shared_buffer: Shared buffering used for egress ports on the path
256 * @ingress_fc_enable: Flow control for ingress ports on the path
257 * @egress_fc_enable: Flow control for egress ports on the path
258 * @priority: Priority group if the path
259 * @weight: Weight of the path inside the priority group
260 * @drop_packages: Drop packages from queue tail or head
261 * @activated: Is the path active
262 * @clear_fc: Clear all flow control from the path config space entries
263 * when deactivating this path
265 * @path_length: How many hops the path uses
267 * A path consists of a number of hops (see &struct tb_path_hop). To
268 * establish a PCIe tunnel two paths have to be created between the two
275 enum tb_path_port ingress_shared_buffer;
276 enum tb_path_port egress_shared_buffer;
277 enum tb_path_port ingress_fc_enable;
278 enum tb_path_port egress_fc_enable;
280 unsigned int priority:3;
285 struct tb_path_hop *hops;
289 /* HopIDs 0-7 are reserved by the Thunderbolt protocol */
290 #define TB_PATH_MIN_HOPID 8
292 * Support paths from the farthest (depth 6) router to the host and back
293 * to the same level (not necessarily to the same router).
295 #define TB_PATH_MAX_HOPS (7 * 2)
298 * struct tb_cm_ops - Connection manager specific operations vector
299 * @driver_ready: Called right after control channel is started. Used by
300 * ICM to send driver ready message to the firmware.
301 * @start: Starts the domain
302 * @stop: Stops the domain
303 * @suspend_noirq: Connection manager specific suspend_noirq
304 * @resume_noirq: Connection manager specific resume_noirq
305 * @suspend: Connection manager specific suspend
306 * @complete: Connection manager specific complete
307 * @runtime_suspend: Connection manager specific runtime_suspend
308 * @runtime_resume: Connection manager specific runtime_resume
309 * @runtime_suspend_switch: Runtime suspend a switch
310 * @runtime_resume_switch: Runtime resume a switch
311 * @handle_event: Handle thunderbolt event
312 * @get_boot_acl: Get boot ACL list
313 * @set_boot_acl: Set boot ACL list
314 * @approve_switch: Approve switch
315 * @add_switch_key: Add key to switch
316 * @challenge_switch_key: Challenge switch using key
317 * @disconnect_pcie_paths: Disconnects PCIe paths before NVM update
318 * @approve_xdomain_paths: Approve (establish) XDomain DMA paths
319 * @disconnect_xdomain_paths: Disconnect XDomain DMA paths
322 int (*driver_ready)(struct tb *tb);
323 int (*start)(struct tb *tb);
324 void (*stop)(struct tb *tb);
325 int (*suspend_noirq)(struct tb *tb);
326 int (*resume_noirq)(struct tb *tb);
327 int (*suspend)(struct tb *tb);
328 void (*complete)(struct tb *tb);
329 int (*runtime_suspend)(struct tb *tb);
330 int (*runtime_resume)(struct tb *tb);
331 int (*runtime_suspend_switch)(struct tb_switch *sw);
332 int (*runtime_resume_switch)(struct tb_switch *sw);
333 void (*handle_event)(struct tb *tb, enum tb_cfg_pkg_type,
334 const void *buf, size_t size);
335 int (*get_boot_acl)(struct tb *tb, uuid_t *uuids, size_t nuuids);
336 int (*set_boot_acl)(struct tb *tb, const uuid_t *uuids, size_t nuuids);
337 int (*approve_switch)(struct tb *tb, struct tb_switch *sw);
338 int (*add_switch_key)(struct tb *tb, struct tb_switch *sw);
339 int (*challenge_switch_key)(struct tb *tb, struct tb_switch *sw,
340 const u8 *challenge, u8 *response);
341 int (*disconnect_pcie_paths)(struct tb *tb);
342 int (*approve_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd);
343 int (*disconnect_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd);
346 static inline void *tb_priv(struct tb *tb)
348 return (void *)tb->privdata;
351 #define TB_AUTOSUSPEND_DELAY 15000 /* ms */
353 /* helper functions & macros */
356 * tb_upstream_port() - return the upstream port of a switch
358 * Every switch has an upstream port (for the root switch it is the NHI).
360 * During switch alloc/init tb_upstream_port()->remote may be NULL, even for
361 * non root switches (on the NHI port remote is always NULL).
363 * Return: Returns the upstream port of the switch.
365 static inline struct tb_port *tb_upstream_port(struct tb_switch *sw)
367 return &sw->ports[sw->config.upstream_port_number];
371 * tb_is_upstream_port() - Is the port upstream facing
372 * @port: Port to check
374 * Returns true if @port is upstream facing port. In case of dual link
375 * ports both return true.
377 static inline bool tb_is_upstream_port(const struct tb_port *port)
379 const struct tb_port *upstream_port = tb_upstream_port(port->sw);
380 return port == upstream_port || port->dual_link_port == upstream_port;
383 static inline u64 tb_route(const struct tb_switch *sw)
385 return ((u64) sw->config.route_hi) << 32 | sw->config.route_lo;
388 static inline struct tb_port *tb_port_at(u64 route, struct tb_switch *sw)
392 port = route >> (sw->config.depth * 8);
393 if (WARN_ON(port > sw->config.max_port_number))
395 return &sw->ports[port];
399 * tb_port_has_remote() - Does the port have switch connected downstream
400 * @port: Port to check
402 * Returns true only when the port is primary port and has remote set.
404 static inline bool tb_port_has_remote(const struct tb_port *port)
406 if (tb_is_upstream_port(port))
410 if (port->dual_link_port && port->link_nr)
416 static inline bool tb_port_is_null(const struct tb_port *port)
418 return port && port->port && port->config.type == TB_TYPE_PORT;
421 static inline bool tb_port_is_pcie_down(const struct tb_port *port)
423 return port && port->config.type == TB_TYPE_PCIE_DOWN;
426 static inline bool tb_port_is_pcie_up(const struct tb_port *port)
428 return port && port->config.type == TB_TYPE_PCIE_UP;
431 static inline bool tb_port_is_dpin(const struct tb_port *port)
433 return port && port->config.type == TB_TYPE_DP_HDMI_IN;
436 static inline bool tb_port_is_dpout(const struct tb_port *port)
438 return port && port->config.type == TB_TYPE_DP_HDMI_OUT;
441 static inline bool tb_port_is_usb3_down(const struct tb_port *port)
443 return port && port->config.type == TB_TYPE_USB3_DOWN;
446 static inline bool tb_port_is_usb3_up(const struct tb_port *port)
448 return port && port->config.type == TB_TYPE_USB3_UP;
451 static inline int tb_sw_read(struct tb_switch *sw, void *buffer,
452 enum tb_cfg_space space, u32 offset, u32 length)
454 if (sw->is_unplugged)
456 return tb_cfg_read(sw->tb->ctl,
465 static inline int tb_sw_write(struct tb_switch *sw, const void *buffer,
466 enum tb_cfg_space space, u32 offset, u32 length)
468 if (sw->is_unplugged)
470 return tb_cfg_write(sw->tb->ctl,
479 static inline int tb_port_read(struct tb_port *port, void *buffer,
480 enum tb_cfg_space space, u32 offset, u32 length)
482 if (port->sw->is_unplugged)
484 return tb_cfg_read(port->sw->tb->ctl,
493 static inline int tb_port_write(struct tb_port *port, const void *buffer,
494 enum tb_cfg_space space, u32 offset, u32 length)
496 if (port->sw->is_unplugged)
498 return tb_cfg_write(port->sw->tb->ctl,
507 #define tb_err(tb, fmt, arg...) dev_err(&(tb)->nhi->pdev->dev, fmt, ## arg)
508 #define tb_WARN(tb, fmt, arg...) dev_WARN(&(tb)->nhi->pdev->dev, fmt, ## arg)
509 #define tb_warn(tb, fmt, arg...) dev_warn(&(tb)->nhi->pdev->dev, fmt, ## arg)
510 #define tb_info(tb, fmt, arg...) dev_info(&(tb)->nhi->pdev->dev, fmt, ## arg)
511 #define tb_dbg(tb, fmt, arg...) dev_dbg(&(tb)->nhi->pdev->dev, fmt, ## arg)
513 #define __TB_SW_PRINT(level, sw, fmt, arg...) \
515 const struct tb_switch *__sw = (sw); \
516 level(__sw->tb, "%llx: " fmt, \
517 tb_route(__sw), ## arg); \
519 #define tb_sw_WARN(sw, fmt, arg...) __TB_SW_PRINT(tb_WARN, sw, fmt, ##arg)
520 #define tb_sw_warn(sw, fmt, arg...) __TB_SW_PRINT(tb_warn, sw, fmt, ##arg)
521 #define tb_sw_info(sw, fmt, arg...) __TB_SW_PRINT(tb_info, sw, fmt, ##arg)
522 #define tb_sw_dbg(sw, fmt, arg...) __TB_SW_PRINT(tb_dbg, sw, fmt, ##arg)
524 #define __TB_PORT_PRINT(level, _port, fmt, arg...) \
526 const struct tb_port *__port = (_port); \
527 level(__port->sw->tb, "%llx:%x: " fmt, \
528 tb_route(__port->sw), __port->port, ## arg); \
530 #define tb_port_WARN(port, fmt, arg...) \
531 __TB_PORT_PRINT(tb_WARN, port, fmt, ##arg)
532 #define tb_port_warn(port, fmt, arg...) \
533 __TB_PORT_PRINT(tb_warn, port, fmt, ##arg)
534 #define tb_port_info(port, fmt, arg...) \
535 __TB_PORT_PRINT(tb_info, port, fmt, ##arg)
536 #define tb_port_dbg(port, fmt, arg...) \
537 __TB_PORT_PRINT(tb_dbg, port, fmt, ##arg)
539 struct tb *icm_probe(struct tb_nhi *nhi);
540 struct tb *tb_probe(struct tb_nhi *nhi);
542 extern struct device_type tb_domain_type;
543 extern struct device_type tb_switch_type;
545 int tb_domain_init(void);
546 void tb_domain_exit(void);
547 void tb_switch_exit(void);
548 int tb_xdomain_init(void);
549 void tb_xdomain_exit(void);
551 struct tb *tb_domain_alloc(struct tb_nhi *nhi, size_t privsize);
552 int tb_domain_add(struct tb *tb);
553 void tb_domain_remove(struct tb *tb);
554 int tb_domain_suspend_noirq(struct tb *tb);
555 int tb_domain_resume_noirq(struct tb *tb);
556 int tb_domain_suspend(struct tb *tb);
557 void tb_domain_complete(struct tb *tb);
558 int tb_domain_runtime_suspend(struct tb *tb);
559 int tb_domain_runtime_resume(struct tb *tb);
560 int tb_domain_approve_switch(struct tb *tb, struct tb_switch *sw);
561 int tb_domain_approve_switch_key(struct tb *tb, struct tb_switch *sw);
562 int tb_domain_challenge_switch_key(struct tb *tb, struct tb_switch *sw);
563 int tb_domain_disconnect_pcie_paths(struct tb *tb);
564 int tb_domain_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd);
565 int tb_domain_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd);
566 int tb_domain_disconnect_all_paths(struct tb *tb);
568 static inline struct tb *tb_domain_get(struct tb *tb)
571 get_device(&tb->dev);
575 static inline void tb_domain_put(struct tb *tb)
577 put_device(&tb->dev);
580 struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent,
582 struct tb_switch *tb_switch_alloc_safe_mode(struct tb *tb,
583 struct device *parent, u64 route);
584 int tb_switch_configure(struct tb_switch *sw);
585 int tb_switch_add(struct tb_switch *sw);
586 void tb_switch_remove(struct tb_switch *sw);
587 void tb_switch_suspend(struct tb_switch *sw);
588 int tb_switch_resume(struct tb_switch *sw);
589 int tb_switch_reset(struct tb *tb, u64 route);
590 void tb_sw_set_unplugged(struct tb_switch *sw);
591 struct tb_port *tb_switch_find_port(struct tb_switch *sw,
592 enum tb_port_type type);
593 struct tb_switch *tb_switch_find_by_link_depth(struct tb *tb, u8 link,
595 struct tb_switch *tb_switch_find_by_uuid(struct tb *tb, const uuid_t *uuid);
596 struct tb_switch *tb_switch_find_by_route(struct tb *tb, u64 route);
599 * tb_switch_for_each_port() - Iterate over each switch port
600 * @sw: Switch whose ports to iterate
601 * @p: Port used as iterator
603 * Iterates over each switch port skipping the control port (port %0).
605 #define tb_switch_for_each_port(sw, p) \
606 for ((p) = &(sw)->ports[1]; \
607 (p) <= &(sw)->ports[(sw)->config.max_port_number]; (p)++)
609 static inline struct tb_switch *tb_switch_get(struct tb_switch *sw)
612 get_device(&sw->dev);
616 static inline void tb_switch_put(struct tb_switch *sw)
618 put_device(&sw->dev);
621 static inline bool tb_is_switch(const struct device *dev)
623 return dev->type == &tb_switch_type;
626 static inline struct tb_switch *tb_to_switch(struct device *dev)
628 if (tb_is_switch(dev))
629 return container_of(dev, struct tb_switch, dev);
633 static inline struct tb_switch *tb_switch_parent(struct tb_switch *sw)
635 return tb_to_switch(sw->dev.parent);
638 static inline bool tb_switch_is_light_ridge(const struct tb_switch *sw)
640 return sw->config.device_id == PCI_DEVICE_ID_INTEL_LIGHT_RIDGE;
643 static inline bool tb_switch_is_eagle_ridge(const struct tb_switch *sw)
645 return sw->config.device_id == PCI_DEVICE_ID_INTEL_EAGLE_RIDGE;
648 static inline bool tb_switch_is_cactus_ridge(const struct tb_switch *sw)
650 switch (sw->config.device_id) {
651 case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_2C:
652 case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C:
659 static inline bool tb_switch_is_falcon_ridge(const struct tb_switch *sw)
661 switch (sw->config.device_id) {
662 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_BRIDGE:
663 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_BRIDGE:
670 static inline bool tb_switch_is_alpine_ridge(const struct tb_switch *sw)
672 switch (sw->config.device_id) {
673 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_BRIDGE:
674 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_BRIDGE:
675 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_BRIDGE:
676 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_BRIDGE:
683 static inline bool tb_switch_is_titan_ridge(const struct tb_switch *sw)
685 switch (sw->config.device_id) {
686 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_BRIDGE:
687 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_BRIDGE:
688 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_DD_BRIDGE:
696 * tb_switch_is_usb4() - Is the switch USB4 compliant
697 * @sw: Switch to check
699 * Returns true if the @sw is USB4 compliant router, false otherwise.
701 static inline bool tb_switch_is_usb4(const struct tb_switch *sw)
703 return sw->config.thunderbolt_version == USB4_VERSION_1_0;
707 * tb_switch_is_icm() - Is the switch handled by ICM firmware
708 * @sw: Switch to check
710 * In case there is a need to differentiate whether ICM firmware or SW CM
711 * is handling @sw this function can be called. It is valid to call this
712 * after tb_switch_alloc() and tb_switch_configure() has been called
713 * (latter only for SW CM case).
715 static inline bool tb_switch_is_icm(const struct tb_switch *sw)
717 return !sw->config.enabled;
720 int tb_switch_lane_bonding_enable(struct tb_switch *sw);
721 void tb_switch_lane_bonding_disable(struct tb_switch *sw);
723 bool tb_switch_query_dp_resource(struct tb_switch *sw, struct tb_port *in);
724 int tb_switch_alloc_dp_resource(struct tb_switch *sw, struct tb_port *in);
725 void tb_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in);
727 int tb_switch_tmu_init(struct tb_switch *sw);
728 int tb_switch_tmu_post_time(struct tb_switch *sw);
729 int tb_switch_tmu_disable(struct tb_switch *sw);
730 int tb_switch_tmu_enable(struct tb_switch *sw);
732 static inline bool tb_switch_tmu_is_enabled(const struct tb_switch *sw)
734 return sw->tmu.rate == TB_SWITCH_TMU_RATE_HIFI &&
735 !sw->tmu.unidirectional;
738 int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged);
739 int tb_port_add_nfc_credits(struct tb_port *port, int credits);
740 int tb_port_set_initial_credits(struct tb_port *port, u32 credits);
741 int tb_port_clear_counter(struct tb_port *port, int counter);
742 int tb_port_unlock(struct tb_port *port);
743 int tb_port_alloc_in_hopid(struct tb_port *port, int hopid, int max_hopid);
744 void tb_port_release_in_hopid(struct tb_port *port, int hopid);
745 int tb_port_alloc_out_hopid(struct tb_port *port, int hopid, int max_hopid);
746 void tb_port_release_out_hopid(struct tb_port *port, int hopid);
747 struct tb_port *tb_next_port_on_path(struct tb_port *start, struct tb_port *end,
748 struct tb_port *prev);
751 * tb_for_each_port_on_path() - Iterate over each port on path
753 * @dst: Destination port
754 * @p: Port used as iterator
756 * Walks over each port on path from @src to @dst.
758 #define tb_for_each_port_on_path(src, dst, p) \
759 for ((p) = tb_next_port_on_path((src), (dst), NULL); (p); \
760 (p) = tb_next_port_on_path((src), (dst), (p)))
762 int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec);
763 int tb_switch_find_cap(struct tb_switch *sw, enum tb_switch_cap cap);
764 int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap);
765 bool tb_port_is_enabled(struct tb_port *port);
767 bool tb_usb3_port_is_enabled(struct tb_port *port);
768 int tb_usb3_port_enable(struct tb_port *port, bool enable);
770 bool tb_pci_port_is_enabled(struct tb_port *port);
771 int tb_pci_port_enable(struct tb_port *port, bool enable);
773 int tb_dp_port_hpd_is_active(struct tb_port *port);
774 int tb_dp_port_hpd_clear(struct tb_port *port);
775 int tb_dp_port_set_hops(struct tb_port *port, unsigned int video,
776 unsigned int aux_tx, unsigned int aux_rx);
777 bool tb_dp_port_is_enabled(struct tb_port *port);
778 int tb_dp_port_enable(struct tb_port *port, bool enable);
780 struct tb_path *tb_path_discover(struct tb_port *src, int src_hopid,
781 struct tb_port *dst, int dst_hopid,
782 struct tb_port **last, const char *name);
783 struct tb_path *tb_path_alloc(struct tb *tb, struct tb_port *src, int src_hopid,
784 struct tb_port *dst, int dst_hopid, int link_nr,
786 void tb_path_free(struct tb_path *path);
787 int tb_path_activate(struct tb_path *path);
788 void tb_path_deactivate(struct tb_path *path);
789 bool tb_path_is_invalid(struct tb_path *path);
790 bool tb_path_switch_on_path(const struct tb_path *path,
791 const struct tb_switch *sw);
793 int tb_drom_read(struct tb_switch *sw);
794 int tb_drom_read_uid_only(struct tb_switch *sw, u64 *uid);
796 int tb_lc_read_uuid(struct tb_switch *sw, u32 *uuid);
797 int tb_lc_configure_link(struct tb_switch *sw);
798 void tb_lc_unconfigure_link(struct tb_switch *sw);
799 int tb_lc_set_sleep(struct tb_switch *sw);
800 bool tb_lc_lane_bonding_possible(struct tb_switch *sw);
801 bool tb_lc_dp_sink_query(struct tb_switch *sw, struct tb_port *in);
802 int tb_lc_dp_sink_alloc(struct tb_switch *sw, struct tb_port *in);
803 int tb_lc_dp_sink_dealloc(struct tb_switch *sw, struct tb_port *in);
805 static inline int tb_route_length(u64 route)
807 return (fls64(route) + TB_ROUTE_SHIFT - 1) / TB_ROUTE_SHIFT;
811 * tb_downstream_route() - get route to downstream switch
813 * Port must not be the upstream port (otherwise a loop is created).
815 * Return: Returns a route to the switch behind @port.
817 static inline u64 tb_downstream_route(struct tb_port *port)
819 return tb_route(port->sw)
820 | ((u64) port->port << (port->sw->config.depth * 8));
823 bool tb_xdomain_handle_request(struct tb *tb, enum tb_cfg_pkg_type type,
824 const void *buf, size_t size);
825 struct tb_xdomain *tb_xdomain_alloc(struct tb *tb, struct device *parent,
826 u64 route, const uuid_t *local_uuid,
827 const uuid_t *remote_uuid);
828 void tb_xdomain_add(struct tb_xdomain *xd);
829 void tb_xdomain_remove(struct tb_xdomain *xd);
830 struct tb_xdomain *tb_xdomain_find_by_link_depth(struct tb *tb, u8 link,
833 int usb4_switch_setup(struct tb_switch *sw);
834 int usb4_switch_read_uid(struct tb_switch *sw, u64 *uid);
835 int usb4_switch_drom_read(struct tb_switch *sw, unsigned int address, void *buf,
837 int usb4_switch_configure_link(struct tb_switch *sw);
838 void usb4_switch_unconfigure_link(struct tb_switch *sw);
839 bool usb4_switch_lane_bonding_possible(struct tb_switch *sw);
840 int usb4_switch_set_sleep(struct tb_switch *sw);
841 int usb4_switch_nvm_sector_size(struct tb_switch *sw);
842 int usb4_switch_nvm_read(struct tb_switch *sw, unsigned int address, void *buf,
844 int usb4_switch_nvm_write(struct tb_switch *sw, unsigned int address,
845 const void *buf, size_t size);
846 int usb4_switch_nvm_authenticate(struct tb_switch *sw);
847 bool usb4_switch_query_dp_resource(struct tb_switch *sw, struct tb_port *in);
848 int usb4_switch_alloc_dp_resource(struct tb_switch *sw, struct tb_port *in);
849 int usb4_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in);
850 struct tb_port *usb4_switch_map_pcie_down(struct tb_switch *sw,
851 const struct tb_port *port);
852 struct tb_port *usb4_switch_map_usb3_down(struct tb_switch *sw,
853 const struct tb_port *port);
855 int usb4_port_unlock(struct tb_port *port);