2 * Universal Flash Storage Host controller driver
4 * This code is based on drivers/scsi/ufs/ufshcd.h
5 * Copyright (C) 2011-2013 Samsung India Software Operations
6 * Copyright (c) 2013-2016, The Linux Foundation. All rights reserved.
9 * Santosh Yaraganavi <santosh.sy@samsung.com>
10 * Vinayak Holikatti <h.vinayak@samsung.com>
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
16 * See the COPYING file in the top-level directory or visit
17 * <http://www.gnu.org/licenses/gpl-2.0.html>
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * This program is provided "AS IS" and "WITH ALL FAULTS" and
25 * without warranty of any kind. You are solely responsible for
26 * determining the appropriateness of using and distributing
27 * the program and assume all risks associated with your exercise
28 * of rights with respect to the program, including but not limited
29 * to infringement of third party rights, the risks and costs of
30 * program errors, damage to or loss of data, programs or equipment,
31 * and unavailability or interruption of operations. Under no
32 * circumstances will the contributor of this Program be liable for
33 * any damages of any kind arising from your use or distribution of
40 #include <linux/module.h>
41 #include <linux/kernel.h>
42 #include <linux/init.h>
43 #include <linux/interrupt.h>
45 #include <linux/delay.h>
46 #include <linux/slab.h>
47 #include <linux/spinlock.h>
48 #include <linux/rwsem.h>
49 #include <linux/workqueue.h>
50 #include <linux/errno.h>
51 #include <linux/types.h>
52 #include <linux/wait.h>
53 #include <linux/bitops.h>
54 #include <linux/pm_runtime.h>
55 #include <linux/clk.h>
56 #include <linux/completion.h>
57 #include <linux/regulator/consumer.h>
58 #include <linux/bitfield.h>
59 #include <linux/devfreq.h>
63 #include <asm/byteorder.h>
64 #include <scsi/scsi.h>
65 #include <scsi/scsi_cmnd.h>
66 #include <scsi/scsi_host.h>
67 #include <scsi/scsi_tcq.h>
68 #include <scsi/scsi_dbg.h>
69 #include <scsi/scsi_eh.h>
72 #include "ufs_quirks.h"
75 #define UFSHCD "ufshcd"
76 #define UFSHCD_DRIVER_VERSION "0.2"
81 DEV_CMD_TYPE_NOP = 0x0,
82 DEV_CMD_TYPE_QUERY = 0x1,
86 * struct uic_command - UIC command structure
87 * @command: UIC command
88 * @argument1: UIC command argument 1
89 * @argument2: UIC command argument 2
90 * @argument3: UIC command argument 3
91 * @cmd_active: Indicate if UIC command is outstanding
92 * @result: UIC command result
93 * @done: UIC command completion
102 struct completion done;
105 /* Used to differentiate the power management options */
112 #define ufshcd_is_runtime_pm(op) ((op) == UFS_RUNTIME_PM)
113 #define ufshcd_is_system_pm(op) ((op) == UFS_SYSTEM_PM)
114 #define ufshcd_is_shutdown_pm(op) ((op) == UFS_SHUTDOWN_PM)
116 /* Host <-> Device UniPro Link state */
117 enum uic_link_state {
118 UIC_LINK_OFF_STATE = 0, /* Link powered down or disabled */
119 UIC_LINK_ACTIVE_STATE = 1, /* Link is in Fast/Slow/Sleep state */
120 UIC_LINK_HIBERN8_STATE = 2, /* Link is in Hibernate state */
123 #define ufshcd_is_link_off(hba) ((hba)->uic_link_state == UIC_LINK_OFF_STATE)
124 #define ufshcd_is_link_active(hba) ((hba)->uic_link_state == \
125 UIC_LINK_ACTIVE_STATE)
126 #define ufshcd_is_link_hibern8(hba) ((hba)->uic_link_state == \
127 UIC_LINK_HIBERN8_STATE)
128 #define ufshcd_set_link_off(hba) ((hba)->uic_link_state = UIC_LINK_OFF_STATE)
129 #define ufshcd_set_link_active(hba) ((hba)->uic_link_state = \
130 UIC_LINK_ACTIVE_STATE)
131 #define ufshcd_set_link_hibern8(hba) ((hba)->uic_link_state = \
132 UIC_LINK_HIBERN8_STATE)
134 #define ufshcd_set_ufs_dev_active(h) \
135 ((h)->curr_dev_pwr_mode = UFS_ACTIVE_PWR_MODE)
136 #define ufshcd_set_ufs_dev_sleep(h) \
137 ((h)->curr_dev_pwr_mode = UFS_SLEEP_PWR_MODE)
138 #define ufshcd_set_ufs_dev_poweroff(h) \
139 ((h)->curr_dev_pwr_mode = UFS_POWERDOWN_PWR_MODE)
140 #define ufshcd_is_ufs_dev_active(h) \
141 ((h)->curr_dev_pwr_mode == UFS_ACTIVE_PWR_MODE)
142 #define ufshcd_is_ufs_dev_sleep(h) \
143 ((h)->curr_dev_pwr_mode == UFS_SLEEP_PWR_MODE)
144 #define ufshcd_is_ufs_dev_poweroff(h) \
145 ((h)->curr_dev_pwr_mode == UFS_POWERDOWN_PWR_MODE)
148 * UFS Power management levels.
149 * Each level is in increasing order of power savings.
152 UFS_PM_LVL_0, /* UFS_ACTIVE_PWR_MODE, UIC_LINK_ACTIVE_STATE */
153 UFS_PM_LVL_1, /* UFS_ACTIVE_PWR_MODE, UIC_LINK_HIBERN8_STATE */
154 UFS_PM_LVL_2, /* UFS_SLEEP_PWR_MODE, UIC_LINK_ACTIVE_STATE */
155 UFS_PM_LVL_3, /* UFS_SLEEP_PWR_MODE, UIC_LINK_HIBERN8_STATE */
156 UFS_PM_LVL_4, /* UFS_POWERDOWN_PWR_MODE, UIC_LINK_HIBERN8_STATE */
157 UFS_PM_LVL_5, /* UFS_POWERDOWN_PWR_MODE, UIC_LINK_OFF_STATE */
161 struct ufs_pm_lvl_states {
162 enum ufs_dev_pwr_mode dev_state;
163 enum uic_link_state link_state;
167 * struct ufshcd_lrb - local reference block
168 * @utr_descriptor_ptr: UTRD address of the command
169 * @ucd_req_ptr: UCD address of the command
170 * @ucd_rsp_ptr: Response UPIU address for this command
171 * @ucd_prdt_ptr: PRDT address of the command
172 * @utrd_dma_addr: UTRD dma address for debug
173 * @ucd_prdt_dma_addr: PRDT dma address for debug
174 * @ucd_rsp_dma_addr: UPIU response dma address for debug
175 * @ucd_req_dma_addr: UPIU request dma address for debug
176 * @cmd: pointer to SCSI command
177 * @sense_buffer: pointer to sense buffer address of the SCSI command
178 * @sense_bufflen: Length of the sense buffer
179 * @scsi_status: SCSI status of the command
180 * @command_type: SCSI, UFS, Query.
181 * @task_tag: Task tag of the command
182 * @lun: LUN of the command
183 * @intr_cmd: Interrupt command (doesn't participate in interrupt aggregation)
184 * @issue_time_stamp: time stamp for debug purposes
185 * @compl_time_stamp: time stamp for statistics
186 * @req_abort_skip: skip request abort task flag
189 struct utp_transfer_req_desc *utr_descriptor_ptr;
190 struct utp_upiu_req *ucd_req_ptr;
191 struct utp_upiu_rsp *ucd_rsp_ptr;
192 struct ufshcd_sg_entry *ucd_prdt_ptr;
194 dma_addr_t utrd_dma_addr;
195 dma_addr_t ucd_req_dma_addr;
196 dma_addr_t ucd_rsp_dma_addr;
197 dma_addr_t ucd_prdt_dma_addr;
199 struct scsi_cmnd *cmd;
201 unsigned int sense_bufflen;
206 u8 lun; /* UPIU LUN id field is only 8-bit wide */
208 ktime_t issue_time_stamp;
209 ktime_t compl_time_stamp;
215 * struct ufs_query - holds relevant data structures for query request
216 * @request: request upiu and function
217 * @descriptor: buffer for sending/receiving descriptor
218 * @response: response upiu and response
221 struct ufs_query_req request;
223 struct ufs_query_res response;
227 * struct ufs_dev_cmd - all assosiated fields with device management commands
228 * @type: device management command type - Query, NOP OUT
229 * @lock: lock to allow one command at a time
230 * @complete: internal commands completion
233 enum dev_cmd_type type;
235 struct completion *complete;
236 struct ufs_query query;
239 struct ufs_desc_size {
250 * struct ufs_clk_info - UFS clock related info
251 * @list: list headed by hba->clk_list_head
254 * @max_freq: maximum frequency supported by the clock
255 * @min_freq: min frequency that can be used for clock scaling
256 * @curr_freq: indicates the current frequency that it is set to
257 * @enabled: variable to check against multiple enable/disable
259 struct ufs_clk_info {
260 struct list_head list;
269 enum ufs_notify_change_status {
274 struct ufs_pa_layer_attr {
284 struct ufs_pwr_mode_info {
286 struct ufs_pa_layer_attr info;
290 * struct ufs_hba_variant_ops - variant specific callbacks
291 * @name: variant name
292 * @init: called when the driver is initialized
293 * @exit: called to cleanup everything done in init
294 * @get_ufs_hci_version: called to get UFS HCI version
295 * @clk_scale_notify: notifies that clks are scaled up/down
296 * @setup_clocks: called before touching any of the controller registers
297 * @setup_regulators: called before accessing the host controller
298 * @hce_enable_notify: called before and after HCE enable bit is set to allow
299 * variant specific Uni-Pro initialization.
300 * @link_startup_notify: called before and after Link startup is carried out
301 * to allow variant specific Uni-Pro initialization.
302 * @pwr_change_notify: called before and after a power mode change
303 * is carried out to allow vendor spesific capabilities
305 * @setup_xfer_req: called before any transfer request is issued
307 * @setup_task_mgmt: called before any task management request is issued
309 * @hibern8_notify: called around hibern8 enter/exit
310 * @apply_dev_quirks: called to apply device specific quirks
311 * @suspend: called during host controller PM callback
312 * @resume: called during host controller PM callback
313 * @dbg_register_dump: used to dump controller debug information
314 * @phy_initialization: used to initialize phys
315 * @device_reset: called to issue a reset pulse on the UFS device
317 struct ufs_hba_variant_ops {
319 int (*init)(struct ufs_hba *);
320 void (*exit)(struct ufs_hba *);
321 u32 (*get_ufs_hci_version)(struct ufs_hba *);
322 int (*clk_scale_notify)(struct ufs_hba *, bool,
323 enum ufs_notify_change_status);
324 int (*setup_clocks)(struct ufs_hba *, bool,
325 enum ufs_notify_change_status);
326 int (*setup_regulators)(struct ufs_hba *, bool);
327 int (*hce_enable_notify)(struct ufs_hba *,
328 enum ufs_notify_change_status);
329 int (*link_startup_notify)(struct ufs_hba *,
330 enum ufs_notify_change_status);
331 int (*pwr_change_notify)(struct ufs_hba *,
332 enum ufs_notify_change_status status,
333 struct ufs_pa_layer_attr *,
334 struct ufs_pa_layer_attr *);
335 void (*setup_xfer_req)(struct ufs_hba *, int, bool);
336 void (*setup_task_mgmt)(struct ufs_hba *, int, u8);
337 void (*hibern8_notify)(struct ufs_hba *, enum uic_cmd_dme,
338 enum ufs_notify_change_status);
339 int (*apply_dev_quirks)(struct ufs_hba *hba);
340 void (*fixup_dev_quirks)(struct ufs_hba *hba);
341 int (*suspend)(struct ufs_hba *, enum ufs_pm_op);
342 int (*resume)(struct ufs_hba *, enum ufs_pm_op);
343 void (*dbg_register_dump)(struct ufs_hba *hba);
344 int (*phy_initialization)(struct ufs_hba *);
345 void (*device_reset)(struct ufs_hba *hba);
346 void (*config_scaling_param)(struct ufs_hba *hba,
347 struct devfreq_dev_profile *profile,
351 /* clock gating state */
352 enum clk_gating_state {
360 * struct ufs_clk_gating - UFS clock gating related info
361 * @gate_work: worker to turn off clocks after some delay as specified in
363 * @ungate_work: worker to turn on clocks that will be used in case of
365 * @state: the current clocks state
366 * @delay_ms: gating delay in ms
367 * @is_suspended: clk gating is suspended when set to 1 which can be used
368 * during suspend/resume
369 * @delay_attr: sysfs attribute to control delay_attr
370 * @enable_attr: sysfs attribute to enable/disable clock gating
371 * @is_enabled: Indicates the current status of clock gating
372 * @active_reqs: number of requests that are pending and should be waited for
373 * completion before gating clocks.
375 struct ufs_clk_gating {
376 struct delayed_work gate_work;
377 struct work_struct ungate_work;
378 enum clk_gating_state state;
379 unsigned long delay_ms;
381 struct device_attribute delay_attr;
382 struct device_attribute enable_attr;
385 struct workqueue_struct *clk_gating_workq;
388 struct ufs_saved_pwr_info {
389 struct ufs_pa_layer_attr info;
394 * struct ufs_clk_scaling - UFS clock scaling related data
395 * @active_reqs: number of requests that are pending. If this is zero when
396 * devfreq ->target() function is called then schedule "suspend_work" to
398 * @tot_busy_t: Total busy time in current polling window
399 * @window_start_t: Start time (in jiffies) of the current polling window
400 * @busy_start_t: Start time of current busy period
401 * @enable_attr: sysfs attribute to enable/disable clock scaling
402 * @saved_pwr_info: UFS power mode may also be changed during scaling and this
403 * one keeps track of previous power mode.
404 * @workq: workqueue to schedule devfreq suspend/resume work
405 * @suspend_work: worker to suspend devfreq
406 * @resume_work: worker to resume devfreq
407 * @is_allowed: tracks if scaling is currently allowed or not
408 * @is_busy_started: tracks if busy period has started or not
409 * @is_suspended: tracks if devfreq is suspended or not
411 struct ufs_clk_scaling {
413 unsigned long tot_busy_t;
414 unsigned long window_start_t;
415 ktime_t busy_start_t;
416 struct device_attribute enable_attr;
417 struct ufs_saved_pwr_info saved_pwr_info;
418 struct workqueue_struct *workq;
419 struct work_struct suspend_work;
420 struct work_struct resume_work;
422 bool is_busy_started;
426 #define UFS_ERR_REG_HIST_LENGTH 8
428 * struct ufs_err_reg_hist - keeps history of errors
429 * @pos: index to indicate cyclic buffer position
430 * @reg: cyclic buffer for registers value
431 * @tstamp: cyclic buffer for time stamp
433 struct ufs_err_reg_hist {
435 u32 reg[UFS_ERR_REG_HIST_LENGTH];
436 ktime_t tstamp[UFS_ERR_REG_HIST_LENGTH];
440 * struct ufs_stats - keeps usage/err statistics
441 * @hibern8_exit_cnt: Counter to keep track of number of exits,
442 * reset this after link-startup.
443 * @last_hibern8_exit_tstamp: Set time after the hibern8 exit.
444 * Clear after the first successful command completion.
445 * @pa_err: tracks pa-uic errors
446 * @dl_err: tracks dl-uic errors
447 * @nl_err: tracks nl-uic errors
448 * @tl_err: tracks tl-uic errors
449 * @dme_err: tracks dme errors
450 * @auto_hibern8_err: tracks auto-hibernate errors
451 * @fatal_err: tracks fatal errors
452 * @linkup_err: tracks link-startup errors
453 * @resume_err: tracks resume errors
454 * @suspend_err: tracks suspend errors
455 * @dev_reset: tracks device reset events
456 * @host_reset: tracks host reset events
457 * @tsk_abort: tracks task abort events
460 u32 hibern8_exit_cnt;
461 ktime_t last_hibern8_exit_tstamp;
463 /* uic specific errors */
464 struct ufs_err_reg_hist pa_err;
465 struct ufs_err_reg_hist dl_err;
466 struct ufs_err_reg_hist nl_err;
467 struct ufs_err_reg_hist tl_err;
468 struct ufs_err_reg_hist dme_err;
471 struct ufs_err_reg_hist auto_hibern8_err;
472 struct ufs_err_reg_hist fatal_err;
473 struct ufs_err_reg_hist link_startup_err;
474 struct ufs_err_reg_hist resume_err;
475 struct ufs_err_reg_hist suspend_err;
477 /* abnormal events */
478 struct ufs_err_reg_hist dev_reset;
479 struct ufs_err_reg_hist host_reset;
480 struct ufs_err_reg_hist task_abort;
484 /* Interrupt aggregation support is broken */
485 UFSHCD_QUIRK_BROKEN_INTR_AGGR = 1 << 0,
488 * delay before each dme command is required as the unipro
489 * layer has shown instabilities
491 UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS = 1 << 1,
494 * If UFS host controller is having issue in processing LCC (Line
495 * Control Command) coming from device then enable this quirk.
496 * When this quirk is enabled, host controller driver should disable
497 * the LCC transmission on UFS device (by clearing TX_LCC_ENABLE
498 * attribute of device to 0).
500 UFSHCD_QUIRK_BROKEN_LCC = 1 << 2,
503 * The attribute PA_RXHSUNTERMCAP specifies whether or not the
504 * inbound Link supports unterminated line in HS mode. Setting this
505 * attribute to 1 fixes moving to HS gear.
507 UFSHCD_QUIRK_BROKEN_PA_RXHSUNTERMCAP = 1 << 3,
510 * This quirk needs to be enabled if the host controller only allows
511 * accessing the peer dme attributes in AUTO mode (FAST AUTO or
514 UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE = 1 << 4,
517 * This quirk needs to be enabled if the host controller doesn't
518 * advertise the correct version in UFS_VER register. If this quirk
519 * is enabled, standard UFS host driver will call the vendor specific
520 * ops (get_ufs_hci_version) to get the correct version.
522 UFSHCD_QUIRK_BROKEN_UFS_HCI_VERSION = 1 << 5,
525 * Clear handling for transfer/task request list is just opposite.
527 UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR = 1 << 6,
530 * This quirk needs to be enabled if host controller doesn't allow
531 * that the interrupt aggregation timer and counter are reset by s/w.
533 UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR = 1 << 7,
537 /* Allow dynamic clk gating */
538 UFSHCD_CAP_CLK_GATING = 1 << 0,
540 /* Allow hiberb8 with clk gating */
541 UFSHCD_CAP_HIBERN8_WITH_CLK_GATING = 1 << 1,
543 /* Allow dynamic clk scaling */
544 UFSHCD_CAP_CLK_SCALING = 1 << 2,
546 /* Allow auto bkops to enabled during runtime suspend */
547 UFSHCD_CAP_AUTO_BKOPS_SUSPEND = 1 << 3,
550 * This capability allows host controller driver to use the UFS HCI's
551 * interrupt aggregation capability.
552 * CAUTION: Enabling this might reduce overall UFS throughput.
554 UFSHCD_CAP_INTR_AGGR = 1 << 4,
557 * This capability allows the device auto-bkops to be always enabled
558 * except during suspend (both runtime and suspend).
559 * Enabling this capability means that device will always be allowed
560 * to do background operation when it's active but it might degrade
561 * the performance of ongoing read/write operations.
563 UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND = 1 << 5,
566 * This capability allows host controller driver to automatically
567 * enable runtime power management by itself instead of waiting
568 * for userspace to control the power management.
570 UFSHCD_CAP_RPM_AUTOSUSPEND = 1 << 6,
573 * This capability allows the host controller driver to turn-on
574 * WriteBooster, if the underlying device supports it and is
575 * provisioned to be used. This would increase the write performance.
577 UFSHCD_CAP_WB_EN = 1 << 7,
580 struct ufs_hba_variant_params {
581 struct devfreq_dev_profile devfreq_profile;
582 struct devfreq_simple_ondemand_data ondemand_data;
583 u16 hba_enable_delay_us;
584 u32 wb_flush_threshold;
588 * struct ufs_hba - per adapter private structure
589 * @mmio_base: UFSHCI base register address
590 * @ucdl_base_addr: UFS Command Descriptor base address
591 * @utrdl_base_addr: UTP Transfer Request Descriptor base address
592 * @utmrdl_base_addr: UTP Task Management Descriptor base address
593 * @ucdl_dma_addr: UFS Command Descriptor DMA address
594 * @utrdl_dma_addr: UTRDL DMA address
595 * @utmrdl_dma_addr: UTMRDL DMA address
596 * @host: Scsi_Host instance of the driver
597 * @dev: device handle
598 * @lrb: local reference block
599 * @cmd_queue: Used to allocate command tags from hba->host->tag_set.
600 * @outstanding_tasks: Bits representing outstanding task requests
601 * @outstanding_reqs: Bits representing outstanding transfer requests
602 * @capabilities: UFS Controller Capabilities
603 * @nutrs: Transfer Request Queue depth supported by controller
604 * @nutmrs: Task Management Queue depth supported by controller
605 * @ufs_version: UFS Version to which controller complies
606 * @vops: pointer to variant specific operations
607 * @priv: pointer to variant specific private data
608 * @irq: Irq number of the controller
609 * @active_uic_cmd: handle of active UIC command
610 * @uic_cmd_mutex: mutex for uic command
611 * @tmf_tag_set: TMF tag set.
612 * @tmf_queue: Used to allocate TMF tags.
613 * @pwr_done: completion for power mode change
614 * @ufshcd_state: UFSHCD states
615 * @eh_flags: Error handling flags
616 * @intr_mask: Interrupt Mask Bits
617 * @ee_ctrl_mask: Exception event control mask
618 * @is_powered: flag to check if HBA is powered
619 * @eh_work: Worker to handle UFS errors that require s/w attention
620 * @eeh_work: Worker to handle exception events
621 * @errors: HBA errors
622 * @uic_error: UFS interconnect layer error status
623 * @saved_err: sticky error mask
624 * @saved_uic_err: sticky UIC error mask
625 * @silence_err_logs: flag to silence error logs
626 * @dev_cmd: ufs device management command information
627 * @last_dme_cmd_tstamp: time stamp of the last completed DME command
628 * @auto_bkops_enabled: to track whether bkops is enabled in device
629 * @vreg_info: UFS device voltage regulator information
630 * @clk_list_head: UFS host controller clocks list node head
631 * @pwr_info: holds current power mode
632 * @max_pwr_info: keeps the device max valid pwm
633 * @desc_size: descriptor sizes reported by device
634 * @urgent_bkops_lvl: keeps track of urgent bkops level for device
635 * @is_urgent_bkops_lvl_checked: keeps track if the urgent bkops level for
636 * device is known or not.
637 * @scsi_block_reqs_cnt: reference counting for scsi block requests
640 void __iomem *mmio_base;
642 /* Virtual memory reference */
643 struct utp_transfer_cmd_desc *ucdl_base_addr;
644 struct utp_transfer_req_desc *utrdl_base_addr;
645 struct utp_task_req_desc *utmrdl_base_addr;
647 /* DMA memory reference */
648 dma_addr_t ucdl_dma_addr;
649 dma_addr_t utrdl_dma_addr;
650 dma_addr_t utmrdl_dma_addr;
652 struct Scsi_Host *host;
654 struct request_queue *cmd_queue;
656 * This field is to keep a reference to "scsi_device" corresponding to
659 struct scsi_device *sdev_ufs_device;
661 enum ufs_dev_pwr_mode curr_dev_pwr_mode;
662 enum uic_link_state uic_link_state;
663 /* Desired UFS power management level during runtime PM */
664 enum ufs_pm_level rpm_lvl;
665 /* Desired UFS power management level during system PM */
666 enum ufs_pm_level spm_lvl;
667 struct device_attribute rpm_lvl_attr;
668 struct device_attribute spm_lvl_attr;
669 int pm_op_in_progress;
671 /* Auto-Hibernate Idle Timer register value */
674 struct ufshcd_lrb *lrb;
676 unsigned long outstanding_tasks;
677 unsigned long outstanding_reqs;
683 const struct ufs_hba_variant_ops *vops;
684 struct ufs_hba_variant_params *vps;
688 enum ufs_ref_clk_freq dev_ref_clk_freq;
690 unsigned int quirks; /* Deviations from standard UFSHCI spec. */
692 /* Device deviations from standard UFS device spec. */
693 unsigned int dev_quirks;
695 struct blk_mq_tag_set tmf_tag_set;
696 struct request_queue *tmf_queue;
698 struct uic_command *active_uic_cmd;
699 struct mutex uic_cmd_mutex;
700 struct completion *uic_async_done;
709 struct work_struct eh_work;
710 struct work_struct eeh_work;
717 struct ufs_stats ufs_stats;
718 bool silence_err_logs;
720 /* Device management request data */
721 struct ufs_dev_cmd dev_cmd;
722 ktime_t last_dme_cmd_tstamp;
724 /* Keeps information of the UFS device connected to this host */
725 struct ufs_dev_info dev_info;
726 bool auto_bkops_enabled;
727 struct ufs_vreg_info vreg_info;
728 struct list_head clk_list_head;
730 bool wlun_dev_clr_ua;
732 /* Number of requests aborts */
735 /* Number of lanes available (1 or 2) for Rx/Tx */
736 u32 lanes_per_direction;
737 struct ufs_pa_layer_attr pwr_info;
738 struct ufs_pwr_mode_info max_pwr_info;
740 struct ufs_clk_gating clk_gating;
741 /* Control to enable/disable host capabilities */
744 struct devfreq *devfreq;
745 struct ufs_clk_scaling clk_scaling;
746 bool is_sys_suspended;
748 enum bkops_status urgent_bkops_lvl;
749 bool is_urgent_bkops_lvl_checked;
751 struct rw_semaphore clk_scaling_lock;
752 struct ufs_desc_size desc_size;
753 atomic_t scsi_block_reqs_cnt;
755 struct device bsg_dev;
756 struct request_queue *bsg_queue;
757 bool wb_buf_flush_enabled;
759 struct delayed_work rpm_dev_flush_recheck_work;
762 /* Returns true if clocks can be gated. Otherwise false */
763 static inline bool ufshcd_is_clkgating_allowed(struct ufs_hba *hba)
765 return hba->caps & UFSHCD_CAP_CLK_GATING;
767 static inline bool ufshcd_can_hibern8_during_gating(struct ufs_hba *hba)
769 return hba->caps & UFSHCD_CAP_HIBERN8_WITH_CLK_GATING;
771 static inline int ufshcd_is_clkscaling_supported(struct ufs_hba *hba)
773 return hba->caps & UFSHCD_CAP_CLK_SCALING;
775 static inline bool ufshcd_can_autobkops_during_suspend(struct ufs_hba *hba)
777 return hba->caps & UFSHCD_CAP_AUTO_BKOPS_SUSPEND;
779 static inline bool ufshcd_is_rpm_autosuspend_allowed(struct ufs_hba *hba)
781 return hba->caps & UFSHCD_CAP_RPM_AUTOSUSPEND;
784 static inline bool ufshcd_is_intr_aggr_allowed(struct ufs_hba *hba)
786 /* DWC UFS Core has the Interrupt aggregation feature but is not detectable*/
787 #ifndef CONFIG_SCSI_UFS_DWC
788 if ((hba->caps & UFSHCD_CAP_INTR_AGGR) &&
789 !(hba->quirks & UFSHCD_QUIRK_BROKEN_INTR_AGGR))
798 static inline bool ufshcd_is_auto_hibern8_supported(struct ufs_hba *hba)
800 return (hba->capabilities & MASK_AUTO_HIBERN8_SUPPORT);
803 static inline bool ufshcd_is_auto_hibern8_enabled(struct ufs_hba *hba)
805 return FIELD_GET(UFSHCI_AHIBERN8_TIMER_MASK, hba->ahit) ? true : false;
808 static inline bool ufshcd_is_wb_allowed(struct ufs_hba *hba)
810 return hba->caps & UFSHCD_CAP_WB_EN;
813 #define ufshcd_writel(hba, val, reg) \
814 writel((val), (hba)->mmio_base + (reg))
815 #define ufshcd_readl(hba, reg) \
816 readl((hba)->mmio_base + (reg))
819 * ufshcd_rmwl - read modify write into a register
820 * @hba - per adapter instance
821 * @mask - mask to apply on read value
822 * @val - actual value to write
823 * @reg - register address
825 static inline void ufshcd_rmwl(struct ufs_hba *hba, u32 mask, u32 val, u32 reg)
829 tmp = ufshcd_readl(hba, reg);
832 ufshcd_writel(hba, tmp, reg);
835 int ufshcd_alloc_host(struct device *, struct ufs_hba **);
836 void ufshcd_dealloc_host(struct ufs_hba *);
837 int ufshcd_hba_enable(struct ufs_hba *hba);
838 int ufshcd_init(struct ufs_hba * , void __iomem * , unsigned int);
839 int ufshcd_link_recovery(struct ufs_hba *hba);
840 int ufshcd_make_hba_operational(struct ufs_hba *hba);
841 void ufshcd_remove(struct ufs_hba *);
842 int ufshcd_uic_hibern8_exit(struct ufs_hba *hba);
843 void ufshcd_delay_us(unsigned long us, unsigned long tolerance);
844 int ufshcd_wait_for_register(struct ufs_hba *hba, u32 reg, u32 mask,
845 u32 val, unsigned long interval_us,
846 unsigned long timeout_ms);
847 void ufshcd_parse_dev_ref_clk_freq(struct ufs_hba *hba, struct clk *refclk);
848 void ufshcd_update_reg_hist(struct ufs_err_reg_hist *reg_hist,
851 static inline void check_upiu_size(void)
853 BUILD_BUG_ON(ALIGNED_UPIU_SIZE <
854 GENERAL_UPIU_REQUEST_SIZE + QUERY_DESC_MAX_SIZE);
858 * ufshcd_set_variant - set variant specific data to the hba
859 * @hba - per adapter instance
860 * @variant - pointer to variant specific data
862 static inline void ufshcd_set_variant(struct ufs_hba *hba, void *variant)
869 * ufshcd_get_variant - get variant specific data from the hba
870 * @hba - per adapter instance
872 static inline void *ufshcd_get_variant(struct ufs_hba *hba)
877 static inline bool ufshcd_keep_autobkops_enabled_except_suspend(
880 return hba->caps & UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND;
883 static inline u8 ufshcd_wb_get_query_index(struct ufs_hba *hba)
885 if (hba->dev_info.b_wb_buffer_type == WB_BUF_MODE_LU_DEDICATED)
886 return hba->dev_info.wb_dedicated_lu;
890 extern int ufshcd_runtime_suspend(struct ufs_hba *hba);
891 extern int ufshcd_runtime_resume(struct ufs_hba *hba);
892 extern int ufshcd_runtime_idle(struct ufs_hba *hba);
893 extern int ufshcd_system_suspend(struct ufs_hba *hba);
894 extern int ufshcd_system_resume(struct ufs_hba *hba);
895 extern int ufshcd_shutdown(struct ufs_hba *hba);
896 extern int ufshcd_dme_set_attr(struct ufs_hba *hba, u32 attr_sel,
897 u8 attr_set, u32 mib_val, u8 peer);
898 extern int ufshcd_dme_get_attr(struct ufs_hba *hba, u32 attr_sel,
899 u32 *mib_val, u8 peer);
900 extern int ufshcd_config_pwr_mode(struct ufs_hba *hba,
901 struct ufs_pa_layer_attr *desired_pwr_mode);
903 /* UIC command interfaces for DME primitives */
906 #define ATTR_SET_NOR 0 /* NORMAL */
907 #define ATTR_SET_ST 1 /* STATIC */
909 static inline int ufshcd_dme_set(struct ufs_hba *hba, u32 attr_sel,
912 return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
916 static inline int ufshcd_dme_st_set(struct ufs_hba *hba, u32 attr_sel,
919 return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
923 static inline int ufshcd_dme_peer_set(struct ufs_hba *hba, u32 attr_sel,
926 return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
930 static inline int ufshcd_dme_peer_st_set(struct ufs_hba *hba, u32 attr_sel,
933 return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
937 static inline int ufshcd_dme_get(struct ufs_hba *hba,
938 u32 attr_sel, u32 *mib_val)
940 return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_LOCAL);
943 static inline int ufshcd_dme_peer_get(struct ufs_hba *hba,
944 u32 attr_sel, u32 *mib_val)
946 return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_PEER);
949 static inline bool ufshcd_is_hs_mode(struct ufs_pa_layer_attr *pwr_info)
951 return (pwr_info->pwr_rx == FAST_MODE ||
952 pwr_info->pwr_rx == FASTAUTO_MODE) &&
953 (pwr_info->pwr_tx == FAST_MODE ||
954 pwr_info->pwr_tx == FASTAUTO_MODE);
957 static inline int ufshcd_disable_host_tx_lcc(struct ufs_hba *hba)
959 return ufshcd_dme_set(hba, UIC_ARG_MIB(PA_LOCAL_TX_LCC_ENABLE), 0);
962 /* Expose Query-Request API */
963 int ufshcd_query_descriptor_retry(struct ufs_hba *hba,
964 enum query_opcode opcode,
965 enum desc_idn idn, u8 index,
967 u8 *desc_buf, int *buf_len);
968 int ufshcd_read_desc_param(struct ufs_hba *hba,
969 enum desc_idn desc_id,
974 int ufshcd_query_attr(struct ufs_hba *hba, enum query_opcode opcode,
975 enum attr_idn idn, u8 index, u8 selector, u32 *attr_val);
976 int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
977 enum flag_idn idn, u8 index, bool *flag_res);
979 void ufshcd_auto_hibern8_enable(struct ufs_hba *hba);
980 void ufshcd_auto_hibern8_update(struct ufs_hba *hba, u32 ahit);
981 void ufshcd_fixup_dev_quirks(struct ufs_hba *hba, struct ufs_dev_fix *fixups);
982 #define SD_ASCII_STD true
984 int ufshcd_read_string_desc(struct ufs_hba *hba, u8 desc_index,
985 u8 **buf, bool ascii);
987 int ufshcd_hold(struct ufs_hba *hba, bool async);
988 void ufshcd_release(struct ufs_hba *hba);
990 int ufshcd_map_desc_id_to_length(struct ufs_hba *hba, enum desc_idn desc_id,
993 u32 ufshcd_get_local_unipro_ver(struct ufs_hba *hba);
995 int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd);
997 int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba,
998 struct utp_upiu_req *req_upiu,
999 struct utp_upiu_req *rsp_upiu,
1001 u8 *desc_buff, int *buff_len,
1002 enum query_opcode desc_op);
1004 /* Wrapper functions for safely calling variant operations */
1005 static inline const char *ufshcd_get_var_name(struct ufs_hba *hba)
1008 return hba->vops->name;
1012 static inline int ufshcd_vops_init(struct ufs_hba *hba)
1014 if (hba->vops && hba->vops->init)
1015 return hba->vops->init(hba);
1020 static inline void ufshcd_vops_exit(struct ufs_hba *hba)
1022 if (hba->vops && hba->vops->exit)
1023 return hba->vops->exit(hba);
1026 static inline u32 ufshcd_vops_get_ufs_hci_version(struct ufs_hba *hba)
1028 if (hba->vops && hba->vops->get_ufs_hci_version)
1029 return hba->vops->get_ufs_hci_version(hba);
1031 return ufshcd_readl(hba, REG_UFS_VERSION);
1034 static inline int ufshcd_vops_clk_scale_notify(struct ufs_hba *hba,
1035 bool up, enum ufs_notify_change_status status)
1037 if (hba->vops && hba->vops->clk_scale_notify)
1038 return hba->vops->clk_scale_notify(hba, up, status);
1042 static inline int ufshcd_vops_setup_clocks(struct ufs_hba *hba, bool on,
1043 enum ufs_notify_change_status status)
1045 if (hba->vops && hba->vops->setup_clocks)
1046 return hba->vops->setup_clocks(hba, on, status);
1050 static inline int ufshcd_vops_setup_regulators(struct ufs_hba *hba, bool status)
1052 if (hba->vops && hba->vops->setup_regulators)
1053 return hba->vops->setup_regulators(hba, status);
1058 static inline int ufshcd_vops_hce_enable_notify(struct ufs_hba *hba,
1061 if (hba->vops && hba->vops->hce_enable_notify)
1062 return hba->vops->hce_enable_notify(hba, status);
1066 static inline int ufshcd_vops_link_startup_notify(struct ufs_hba *hba,
1069 if (hba->vops && hba->vops->link_startup_notify)
1070 return hba->vops->link_startup_notify(hba, status);
1075 static inline int ufshcd_vops_pwr_change_notify(struct ufs_hba *hba,
1077 struct ufs_pa_layer_attr *dev_max_params,
1078 struct ufs_pa_layer_attr *dev_req_params)
1080 if (hba->vops && hba->vops->pwr_change_notify)
1081 return hba->vops->pwr_change_notify(hba, status,
1082 dev_max_params, dev_req_params);
1087 static inline void ufshcd_vops_setup_xfer_req(struct ufs_hba *hba, int tag,
1090 if (hba->vops && hba->vops->setup_xfer_req)
1091 return hba->vops->setup_xfer_req(hba, tag, is_scsi_cmd);
1094 static inline void ufshcd_vops_setup_task_mgmt(struct ufs_hba *hba,
1095 int tag, u8 tm_function)
1097 if (hba->vops && hba->vops->setup_task_mgmt)
1098 return hba->vops->setup_task_mgmt(hba, tag, tm_function);
1101 static inline void ufshcd_vops_hibern8_notify(struct ufs_hba *hba,
1102 enum uic_cmd_dme cmd,
1103 enum ufs_notify_change_status status)
1105 if (hba->vops && hba->vops->hibern8_notify)
1106 return hba->vops->hibern8_notify(hba, cmd, status);
1109 static inline int ufshcd_vops_apply_dev_quirks(struct ufs_hba *hba)
1111 if (hba->vops && hba->vops->apply_dev_quirks)
1112 return hba->vops->apply_dev_quirks(hba);
1116 static inline void ufshcd_vops_fixup_dev_quirks(struct ufs_hba *hba)
1118 if (hba->vops && hba->vops->fixup_dev_quirks)
1119 hba->vops->fixup_dev_quirks(hba);
1122 static inline int ufshcd_vops_suspend(struct ufs_hba *hba, enum ufs_pm_op op)
1124 if (hba->vops && hba->vops->suspend)
1125 return hba->vops->suspend(hba, op);
1130 static inline int ufshcd_vops_resume(struct ufs_hba *hba, enum ufs_pm_op op)
1132 if (hba->vops && hba->vops->resume)
1133 return hba->vops->resume(hba, op);
1138 static inline void ufshcd_vops_dbg_register_dump(struct ufs_hba *hba)
1140 if (hba->vops && hba->vops->dbg_register_dump)
1141 hba->vops->dbg_register_dump(hba);
1144 static inline void ufshcd_vops_device_reset(struct ufs_hba *hba)
1146 if (hba->vops && hba->vops->device_reset) {
1147 hba->vops->device_reset(hba);
1148 ufshcd_set_ufs_dev_active(hba);
1149 ufshcd_update_reg_hist(&hba->ufs_stats.dev_reset, 0);
1153 static inline void ufshcd_vops_config_scaling_param(struct ufs_hba *hba,
1154 struct devfreq_dev_profile
1155 *profile, void *data)
1157 if (hba->vops && hba->vops->config_scaling_param)
1158 hba->vops->config_scaling_param(hba, profile, data);
1161 extern struct ufs_pm_lvl_states ufs_pm_lvl_states[];
1164 * ufshcd_scsi_to_upiu_lun - maps scsi LUN to UPIU LUN
1165 * @scsi_lun: scsi LUN id
1167 * Returns UPIU LUN id
1169 static inline u8 ufshcd_scsi_to_upiu_lun(unsigned int scsi_lun)
1171 if (scsi_is_wlun(scsi_lun))
1172 return (scsi_lun & UFS_UPIU_MAX_UNIT_NUM_ID)
1175 return scsi_lun & UFS_UPIU_MAX_UNIT_NUM_ID;
1178 int ufshcd_dump_regs(struct ufs_hba *hba, size_t offset, size_t len,
1179 const char *prefix);
1181 #endif /* End of Header */