root/drivers/scsi/ufs/ufshcd.h

INCLUDED FROM

DEFINITIONS

1. ufshcd_is_clkgating_allowed
2. ufshcd_can_hibern8_during_gating
3. ufshcd_is_clkscaling_supported
4. ufshcd_can_autobkops_during_suspend
5. ufshcd_is_intr_aggr_allowed
6. ufshcd_is_auto_hibern8_supported
7. ufshcd_is_auto_hibern8_enabled
8. ufshcd_rmwl
9. check_upiu_size
10. ufshcd_set_variant
11. ufshcd_get_variant
12. ufshcd_keep_autobkops_enabled_except_suspend
13. ufshcd_dme_set
14. ufshcd_dme_st_set
15. ufshcd_dme_peer_set
16. ufshcd_dme_peer_st_set
17. ufshcd_dme_get
18. ufshcd_dme_peer_get
19. ufshcd_is_hs_mode
20. ufshcd_get_var_name
21. ufshcd_vops_init
22. ufshcd_vops_exit
23. ufshcd_vops_get_ufs_hci_version
24. ufshcd_vops_clk_scale_notify
25. ufshcd_vops_setup_clocks
26. ufshcd_vops_setup_regulators
27. ufshcd_vops_hce_enable_notify
28. ufshcd_vops_link_startup_notify
29. ufshcd_vops_pwr_change_notify
30. ufshcd_vops_setup_xfer_req
31. ufshcd_vops_setup_task_mgmt
32. ufshcd_vops_hibern8_notify
33. ufshcd_vops_apply_dev_quirks
34. ufshcd_vops_suspend
35. ufshcd_vops_resume
36. ufshcd_vops_dbg_register_dump
37. ufshcd_vops_device_reset
38. ufshcd_scsi_to_upiu_lun

   1 /*
   2  * Universal Flash Storage Host controller driver
   3  *
   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.
   7  *
   8  * Authors:
   9  *      Santosh Yaraganavi <santosh.sy@samsung.com>
  10  *      Vinayak Holikatti <h.vinayak@samsung.com>
  11  *
  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>
  18  *
  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.
  23  *
  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
  34  * this program.
  35  */
  36 
  37 #ifndef _UFSHCD_H
  38 #define _UFSHCD_H
  39 
  40 #include <linux/module.h>
  41 #include <linux/kernel.h>
  42 #include <linux/init.h>
  43 #include <linux/interrupt.h>
  44 #include <linux/io.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 "unipro.h"
  60 
  61 #include <asm/irq.h>
  62 #include <asm/byteorder.h>
  63 #include <scsi/scsi.h>
  64 #include <scsi/scsi_cmnd.h>
  65 #include <scsi/scsi_host.h>
  66 #include <scsi/scsi_tcq.h>
  67 #include <scsi/scsi_dbg.h>
  68 #include <scsi/scsi_eh.h>
  69 
  70 #include "ufs.h"
  71 #include "ufshci.h"
  72 
  73 #define UFSHCD "ufshcd"
  74 #define UFSHCD_DRIVER_VERSION "0.2"
  75 
  76 struct ufs_hba;
  77 
  78 enum dev_cmd_type {
  79         DEV_CMD_TYPE_NOP                = 0x0,
  80         DEV_CMD_TYPE_QUERY              = 0x1,
  81 };
  82 
  83 /**
  84  * struct uic_command - UIC command structure
  85  * @command: UIC command
  86  * @argument1: UIC command argument 1
  87  * @argument2: UIC command argument 2
  88  * @argument3: UIC command argument 3
  89  * @cmd_active: Indicate if UIC command is outstanding
  90  * @result: UIC command result
  91  * @done: UIC command completion
  92  */
  93 struct uic_command {
  94         u32 command;
  95         u32 argument1;
  96         u32 argument2;
  97         u32 argument3;
  98         int cmd_active;
  99         int result;
 100         struct completion done;
 101 };
 102 
 103 /* Used to differentiate the power management options */
 104 enum ufs_pm_op {
 105         UFS_RUNTIME_PM,
 106         UFS_SYSTEM_PM,
 107         UFS_SHUTDOWN_PM,
 108 };
 109 
 110 #define ufshcd_is_runtime_pm(op) ((op) == UFS_RUNTIME_PM)
 111 #define ufshcd_is_system_pm(op) ((op) == UFS_SYSTEM_PM)
 112 #define ufshcd_is_shutdown_pm(op) ((op) == UFS_SHUTDOWN_PM)
 113 
 114 /* Host <-> Device UniPro Link state */
 115 enum uic_link_state {
 116         UIC_LINK_OFF_STATE      = 0, /* Link powered down or disabled */
 117         UIC_LINK_ACTIVE_STATE   = 1, /* Link is in Fast/Slow/Sleep state */
 118         UIC_LINK_HIBERN8_STATE  = 2, /* Link is in Hibernate state */
 119 };
 120 
 121 #define ufshcd_is_link_off(hba) ((hba)->uic_link_state == UIC_LINK_OFF_STATE)
 122 #define ufshcd_is_link_active(hba) ((hba)->uic_link_state == \
 123                                     UIC_LINK_ACTIVE_STATE)
 124 #define ufshcd_is_link_hibern8(hba) ((hba)->uic_link_state == \
 125                                     UIC_LINK_HIBERN8_STATE)
 126 #define ufshcd_set_link_off(hba) ((hba)->uic_link_state = UIC_LINK_OFF_STATE)
 127 #define ufshcd_set_link_active(hba) ((hba)->uic_link_state = \
 128                                     UIC_LINK_ACTIVE_STATE)
 129 #define ufshcd_set_link_hibern8(hba) ((hba)->uic_link_state = \
 130                                     UIC_LINK_HIBERN8_STATE)
 131 
 132 /*
 133  * UFS Power management levels.
 134  * Each level is in increasing order of power savings.
 135  */
 136 enum ufs_pm_level {
 137         UFS_PM_LVL_0, /* UFS_ACTIVE_PWR_MODE, UIC_LINK_ACTIVE_STATE */
 138         UFS_PM_LVL_1, /* UFS_ACTIVE_PWR_MODE, UIC_LINK_HIBERN8_STATE */
 139         UFS_PM_LVL_2, /* UFS_SLEEP_PWR_MODE, UIC_LINK_ACTIVE_STATE */
 140         UFS_PM_LVL_3, /* UFS_SLEEP_PWR_MODE, UIC_LINK_HIBERN8_STATE */
 141         UFS_PM_LVL_4, /* UFS_POWERDOWN_PWR_MODE, UIC_LINK_HIBERN8_STATE */
 142         UFS_PM_LVL_5, /* UFS_POWERDOWN_PWR_MODE, UIC_LINK_OFF_STATE */
 143         UFS_PM_LVL_MAX
 144 };
 145 
 146 struct ufs_pm_lvl_states {
 147         enum ufs_dev_pwr_mode dev_state;
 148         enum uic_link_state link_state;
 149 };
 150 
 151 /**
 152  * struct ufshcd_lrb - local reference block
 153  * @utr_descriptor_ptr: UTRD address of the command
 154  * @ucd_req_ptr: UCD address of the command
 155  * @ucd_rsp_ptr: Response UPIU address for this command
 156  * @ucd_prdt_ptr: PRDT address of the command
 157  * @utrd_dma_addr: UTRD dma address for debug
 158  * @ucd_prdt_dma_addr: PRDT dma address for debug
 159  * @ucd_rsp_dma_addr: UPIU response dma address for debug
 160  * @ucd_req_dma_addr: UPIU request dma address for debug
 161  * @cmd: pointer to SCSI command
 162  * @sense_buffer: pointer to sense buffer address of the SCSI command
 163  * @sense_bufflen: Length of the sense buffer
 164  * @scsi_status: SCSI status of the command
 165  * @command_type: SCSI, UFS, Query.
 166  * @task_tag: Task tag of the command
 167  * @lun: LUN of the command
 168  * @intr_cmd: Interrupt command (doesn't participate in interrupt aggregation)
 169  * @issue_time_stamp: time stamp for debug purposes
 170  * @compl_time_stamp: time stamp for statistics
 171  * @req_abort_skip: skip request abort task flag
 172  */
 173 struct ufshcd_lrb {
 174         struct utp_transfer_req_desc *utr_descriptor_ptr;
 175         struct utp_upiu_req *ucd_req_ptr;
 176         struct utp_upiu_rsp *ucd_rsp_ptr;
 177         struct ufshcd_sg_entry *ucd_prdt_ptr;
 178 
 179         dma_addr_t utrd_dma_addr;
 180         dma_addr_t ucd_req_dma_addr;
 181         dma_addr_t ucd_rsp_dma_addr;
 182         dma_addr_t ucd_prdt_dma_addr;
 183 
 184         struct scsi_cmnd *cmd;
 185         u8 *sense_buffer;
 186         unsigned int sense_bufflen;
 187         int scsi_status;
 188 
 189         int command_type;
 190         int task_tag;
 191         u8 lun; /* UPIU LUN id field is only 8-bit wide */
 192         bool intr_cmd;
 193         ktime_t issue_time_stamp;
 194         ktime_t compl_time_stamp;
 195 
 196         bool req_abort_skip;
 197 };
 198 
 199 /**
 200  * struct ufs_query - holds relevant data structures for query request
 201  * @request: request upiu and function
 202  * @descriptor: buffer for sending/receiving descriptor
 203  * @response: response upiu and response
 204  */
 205 struct ufs_query {
 206         struct ufs_query_req request;
 207         u8 *descriptor;
 208         struct ufs_query_res response;
 209 };
 210 
 211 /**
 212  * struct ufs_dev_cmd - all assosiated fields with device management commands
 213  * @type: device management command type - Query, NOP OUT
 214  * @lock: lock to allow one command at a time
 215  * @complete: internal commands completion
 216  * @tag_wq: wait queue until free command slot is available
 217  */
 218 struct ufs_dev_cmd {
 219         enum dev_cmd_type type;
 220         struct mutex lock;
 221         struct completion *complete;
 222         wait_queue_head_t tag_wq;
 223         struct ufs_query query;
 224 };
 225 
 226 struct ufs_desc_size {
 227         int dev_desc;
 228         int pwr_desc;
 229         int geom_desc;
 230         int interc_desc;
 231         int unit_desc;
 232         int conf_desc;
 233         int hlth_desc;
 234 };
 235 
 236 /**
 237  * struct ufs_clk_info - UFS clock related info
 238  * @list: list headed by hba->clk_list_head
 239  * @clk: clock node
 240  * @name: clock name
 241  * @max_freq: maximum frequency supported by the clock
 242  * @min_freq: min frequency that can be used for clock scaling
 243  * @curr_freq: indicates the current frequency that it is set to
 244  * @enabled: variable to check against multiple enable/disable
 245  */
 246 struct ufs_clk_info {
 247         struct list_head list;
 248         struct clk *clk;
 249         const char *name;
 250         u32 max_freq;
 251         u32 min_freq;
 252         u32 curr_freq;
 253         bool enabled;
 254 };
 255 
 256 enum ufs_notify_change_status {
 257         PRE_CHANGE,
 258         POST_CHANGE,
 259 };
 260 
 261 struct ufs_pa_layer_attr {
 262         u32 gear_rx;
 263         u32 gear_tx;
 264         u32 lane_rx;
 265         u32 lane_tx;
 266         u32 pwr_rx;
 267         u32 pwr_tx;
 268         u32 hs_rate;
 269 };
 270 
 271 struct ufs_pwr_mode_info {
 272         bool is_valid;
 273         struct ufs_pa_layer_attr info;
 274 };
 275 
 276 /**
 277  * struct ufs_hba_variant_ops - variant specific callbacks
 278  * @name: variant name
 279  * @init: called when the driver is initialized
 280  * @exit: called to cleanup everything done in init
 281  * @get_ufs_hci_version: called to get UFS HCI version
 282  * @clk_scale_notify: notifies that clks are scaled up/down
 283  * @setup_clocks: called before touching any of the controller registers
 284  * @setup_regulators: called before accessing the host controller
 285  * @hce_enable_notify: called before and after HCE enable bit is set to allow
 286  *                     variant specific Uni-Pro initialization.
 287  * @link_startup_notify: called before and after Link startup is carried out
 288  *                       to allow variant specific Uni-Pro initialization.
 289  * @pwr_change_notify: called before and after a power mode change
 290  *                      is carried out to allow vendor spesific capabilities
 291  *                      to be set.
 292  * @setup_xfer_req: called before any transfer request is issued
 293  *                  to set some things
 294  * @setup_task_mgmt: called before any task management request is issued
 295  *                  to set some things
 296  * @hibern8_notify: called around hibern8 enter/exit
 297  * @apply_dev_quirks: called to apply device specific quirks
 298  * @suspend: called during host controller PM callback
 299  * @resume: called during host controller PM callback
 300  * @dbg_register_dump: used to dump controller debug information
 301  * @phy_initialization: used to initialize phys
 302  * @device_reset: called to issue a reset pulse on the UFS device
 303  */
 304 struct ufs_hba_variant_ops {
 305         const char *name;
 306         int     (*init)(struct ufs_hba *);
 307         void    (*exit)(struct ufs_hba *);
 308         u32     (*get_ufs_hci_version)(struct ufs_hba *);
 309         int     (*clk_scale_notify)(struct ufs_hba *, bool,
 310                                     enum ufs_notify_change_status);
 311         int     (*setup_clocks)(struct ufs_hba *, bool,
 312                                 enum ufs_notify_change_status);
 313         int     (*setup_regulators)(struct ufs_hba *, bool);
 314         int     (*hce_enable_notify)(struct ufs_hba *,
 315                                      enum ufs_notify_change_status);
 316         int     (*link_startup_notify)(struct ufs_hba *,
 317                                        enum ufs_notify_change_status);
 318         int     (*pwr_change_notify)(struct ufs_hba *,
 319                                         enum ufs_notify_change_status status,
 320                                         struct ufs_pa_layer_attr *,
 321                                         struct ufs_pa_layer_attr *);
 322         void    (*setup_xfer_req)(struct ufs_hba *, int, bool);
 323         void    (*setup_task_mgmt)(struct ufs_hba *, int, u8);
 324         void    (*hibern8_notify)(struct ufs_hba *, enum uic_cmd_dme,
 325                                         enum ufs_notify_change_status);
 326         int     (*apply_dev_quirks)(struct ufs_hba *, struct ufs_dev_desc *);
 327         int     (*suspend)(struct ufs_hba *, enum ufs_pm_op);
 328         int     (*resume)(struct ufs_hba *, enum ufs_pm_op);
 329         void    (*dbg_register_dump)(struct ufs_hba *hba);
 330         int     (*phy_initialization)(struct ufs_hba *);
 331         void    (*device_reset)(struct ufs_hba *hba);
 332 };
 333 
 334 /* clock gating state  */
 335 enum clk_gating_state {
 336         CLKS_OFF,
 337         CLKS_ON,
 338         REQ_CLKS_OFF,
 339         REQ_CLKS_ON,
 340 };
 341 
 342 /**
 343  * struct ufs_clk_gating - UFS clock gating related info
 344  * @gate_work: worker to turn off clocks after some delay as specified in
 345  * delay_ms
 346  * @ungate_work: worker to turn on clocks that will be used in case of
 347  * interrupt context
 348  * @state: the current clocks state
 349  * @delay_ms: gating delay in ms
 350  * @is_suspended: clk gating is suspended when set to 1 which can be used
 351  * during suspend/resume
 352  * @delay_attr: sysfs attribute to control delay_attr
 353  * @enable_attr: sysfs attribute to enable/disable clock gating
 354  * @is_enabled: Indicates the current status of clock gating
 355  * @active_reqs: number of requests that are pending and should be waited for
 356  * completion before gating clocks.
 357  */
 358 struct ufs_clk_gating {
 359         struct delayed_work gate_work;
 360         struct work_struct ungate_work;
 361         enum clk_gating_state state;
 362         unsigned long delay_ms;
 363         bool is_suspended;
 364         struct device_attribute delay_attr;
 365         struct device_attribute enable_attr;
 366         bool is_enabled;
 367         int active_reqs;
 368         struct workqueue_struct *clk_gating_workq;
 369 };
 370 
 371 struct ufs_saved_pwr_info {
 372         struct ufs_pa_layer_attr info;
 373         bool is_valid;
 374 };
 375 
 376 /**
 377  * struct ufs_clk_scaling - UFS clock scaling related data
 378  * @active_reqs: number of requests that are pending. If this is zero when
 379  * devfreq ->target() function is called then schedule "suspend_work" to
 380  * suspend devfreq.
 381  * @tot_busy_t: Total busy time in current polling window
 382  * @window_start_t: Start time (in jiffies) of the current polling window
 383  * @busy_start_t: Start time of current busy period
 384  * @enable_attr: sysfs attribute to enable/disable clock scaling
 385  * @saved_pwr_info: UFS power mode may also be changed during scaling and this
 386  * one keeps track of previous power mode.
 387  * @workq: workqueue to schedule devfreq suspend/resume work
 388  * @suspend_work: worker to suspend devfreq
 389  * @resume_work: worker to resume devfreq
 390  * @is_allowed: tracks if scaling is currently allowed or not
 391  * @is_busy_started: tracks if busy period has started or not
 392  * @is_suspended: tracks if devfreq is suspended or not
 393  */
 394 struct ufs_clk_scaling {
 395         int active_reqs;
 396         unsigned long tot_busy_t;
 397         unsigned long window_start_t;
 398         ktime_t busy_start_t;
 399         struct device_attribute enable_attr;
 400         struct ufs_saved_pwr_info saved_pwr_info;
 401         struct workqueue_struct *workq;
 402         struct work_struct suspend_work;
 403         struct work_struct resume_work;
 404         bool is_allowed;
 405         bool is_busy_started;
 406         bool is_suspended;
 407 };
 408 
 409 /**
 410  * struct ufs_init_prefetch - contains data that is pre-fetched once during
 411  * initialization
 412  * @icc_level: icc level which was read during initialization
 413  */
 414 struct ufs_init_prefetch {
 415         u32 icc_level;
 416 };
 417 
 418 #define UFS_ERR_REG_HIST_LENGTH 8
 419 /**
 420  * struct ufs_err_reg_hist - keeps history of errors
 421  * @pos: index to indicate cyclic buffer position
 422  * @reg: cyclic buffer for registers value
 423  * @tstamp: cyclic buffer for time stamp
 424  */
 425 struct ufs_err_reg_hist {
 426         int pos;
 427         u32 reg[UFS_ERR_REG_HIST_LENGTH];
 428         ktime_t tstamp[UFS_ERR_REG_HIST_LENGTH];
 429 };
 430 
 431 /**
 432  * struct ufs_stats - keeps usage/err statistics
 433  * @hibern8_exit_cnt: Counter to keep track of number of exits,
 434  *              reset this after link-startup.
 435  * @last_hibern8_exit_tstamp: Set time after the hibern8 exit.
 436  *              Clear after the first successful command completion.
 437  * @pa_err: tracks pa-uic errors
 438  * @dl_err: tracks dl-uic errors
 439  * @nl_err: tracks nl-uic errors
 440  * @tl_err: tracks tl-uic errors
 441  * @dme_err: tracks dme errors
 442  * @auto_hibern8_err: tracks auto-hibernate errors
 443  * @fatal_err: tracks fatal errors
 444  * @linkup_err: tracks link-startup errors
 445  * @resume_err: tracks resume errors
 446  * @suspend_err: tracks suspend errors
 447  * @dev_reset: tracks device reset events
 448  * @host_reset: tracks host reset events
 449  * @tsk_abort: tracks task abort events
 450  */
 451 struct ufs_stats {
 452         u32 hibern8_exit_cnt;
 453         ktime_t last_hibern8_exit_tstamp;
 454 
 455         /* uic specific errors */
 456         struct ufs_err_reg_hist pa_err;
 457         struct ufs_err_reg_hist dl_err;
 458         struct ufs_err_reg_hist nl_err;
 459         struct ufs_err_reg_hist tl_err;
 460         struct ufs_err_reg_hist dme_err;
 461 
 462         /* fatal errors */
 463         struct ufs_err_reg_hist auto_hibern8_err;
 464         struct ufs_err_reg_hist fatal_err;
 465         struct ufs_err_reg_hist link_startup_err;
 466         struct ufs_err_reg_hist resume_err;
 467         struct ufs_err_reg_hist suspend_err;
 468 
 469         /* abnormal events */
 470         struct ufs_err_reg_hist dev_reset;
 471         struct ufs_err_reg_hist host_reset;
 472         struct ufs_err_reg_hist task_abort;
 473 };
 474 
 475 /**
 476  * struct ufs_hba - per adapter private structure
 477  * @mmio_base: UFSHCI base register address
 478  * @ucdl_base_addr: UFS Command Descriptor base address
 479  * @utrdl_base_addr: UTP Transfer Request Descriptor base address
 480  * @utmrdl_base_addr: UTP Task Management Descriptor base address
 481  * @ucdl_dma_addr: UFS Command Descriptor DMA address
 482  * @utrdl_dma_addr: UTRDL DMA address
 483  * @utmrdl_dma_addr: UTMRDL DMA address
 484  * @host: Scsi_Host instance of the driver
 485  * @dev: device handle
 486  * @lrb: local reference block
 487  * @lrb_in_use: lrb in use
 488  * @outstanding_tasks: Bits representing outstanding task requests
 489  * @outstanding_reqs: Bits representing outstanding transfer requests
 490  * @capabilities: UFS Controller Capabilities
 491  * @nutrs: Transfer Request Queue depth supported by controller
 492  * @nutmrs: Task Management Queue depth supported by controller
 493  * @ufs_version: UFS Version to which controller complies
 494  * @vops: pointer to variant specific operations
 495  * @priv: pointer to variant specific private data
 496  * @irq: Irq number of the controller
 497  * @active_uic_cmd: handle of active UIC command
 498  * @uic_cmd_mutex: mutex for uic command
 499  * @tm_wq: wait queue for task management
 500  * @tm_tag_wq: wait queue for free task management slots
 501  * @tm_slots_in_use: bit map of task management request slots in use
 502  * @pwr_done: completion for power mode change
 503  * @tm_condition: condition variable for task management
 504  * @ufshcd_state: UFSHCD states
 505  * @eh_flags: Error handling flags
 506  * @intr_mask: Interrupt Mask Bits
 507  * @ee_ctrl_mask: Exception event control mask
 508  * @is_powered: flag to check if HBA is powered
 509  * @is_init_prefetch: flag to check if data was pre-fetched in initialization
 510  * @init_prefetch_data: data pre-fetched during initialization
 511  * @eh_work: Worker to handle UFS errors that require s/w attention
 512  * @eeh_work: Worker to handle exception events
 513  * @errors: HBA errors
 514  * @uic_error: UFS interconnect layer error status
 515  * @saved_err: sticky error mask
 516  * @saved_uic_err: sticky UIC error mask
 517  * @silence_err_logs: flag to silence error logs
 518  * @dev_cmd: ufs device management command information
 519  * @last_dme_cmd_tstamp: time stamp of the last completed DME command
 520  * @auto_bkops_enabled: to track whether bkops is enabled in device
 521  * @vreg_info: UFS device voltage regulator information
 522  * @clk_list_head: UFS host controller clocks list node head
 523  * @pwr_info: holds current power mode
 524  * @max_pwr_info: keeps the device max valid pwm
 525  * @desc_size: descriptor sizes reported by device
 526  * @urgent_bkops_lvl: keeps track of urgent bkops level for device
 527  * @is_urgent_bkops_lvl_checked: keeps track if the urgent bkops level for
 528  *  device is known or not.
 529  * @scsi_block_reqs_cnt: reference counting for scsi block requests
 530  */
 531 struct ufs_hba {
 532         void __iomem *mmio_base;
 533 
 534         /* Virtual memory reference */
 535         struct utp_transfer_cmd_desc *ucdl_base_addr;
 536         struct utp_transfer_req_desc *utrdl_base_addr;
 537         struct utp_task_req_desc *utmrdl_base_addr;
 538 
 539         /* DMA memory reference */
 540         dma_addr_t ucdl_dma_addr;
 541         dma_addr_t utrdl_dma_addr;
 542         dma_addr_t utmrdl_dma_addr;
 543 
 544         struct Scsi_Host *host;
 545         struct device *dev;
 546         /*
 547          * This field is to keep a reference to "scsi_device" corresponding to
 548          * "UFS device" W-LU.
 549          */
 550         struct scsi_device *sdev_ufs_device;
 551 
 552         enum ufs_dev_pwr_mode curr_dev_pwr_mode;
 553         enum uic_link_state uic_link_state;
 554         /* Desired UFS power management level during runtime PM */
 555         enum ufs_pm_level rpm_lvl;
 556         /* Desired UFS power management level during system PM */
 557         enum ufs_pm_level spm_lvl;
 558         struct device_attribute rpm_lvl_attr;
 559         struct device_attribute spm_lvl_attr;
 560         int pm_op_in_progress;
 561 
 562         /* Auto-Hibernate Idle Timer register value */
 563         u32 ahit;
 564 
 565         struct ufshcd_lrb *lrb;
 566         unsigned long lrb_in_use;
 567 
 568         unsigned long outstanding_tasks;
 569         unsigned long outstanding_reqs;
 570 
 571         u32 capabilities;
 572         int nutrs;
 573         int nutmrs;
 574         u32 ufs_version;
 575         const struct ufs_hba_variant_ops *vops;
 576         void *priv;
 577         unsigned int irq;
 578         bool is_irq_enabled;
 579         enum ufs_ref_clk_freq dev_ref_clk_freq;
 580 
 581         /* Interrupt aggregation support is broken */
 582         #define UFSHCD_QUIRK_BROKEN_INTR_AGGR                   0x1
 583 
 584         /*
 585          * delay before each dme command is required as the unipro
 586          * layer has shown instabilities
 587          */
 588         #define UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS              0x2
 589 
 590         /*
 591          * If UFS host controller is having issue in processing LCC (Line
 592          * Control Command) coming from device then enable this quirk.
 593          * When this quirk is enabled, host controller driver should disable
 594          * the LCC transmission on UFS device (by clearing TX_LCC_ENABLE
 595          * attribute of device to 0).
 596          */
 597         #define UFSHCD_QUIRK_BROKEN_LCC                         0x4
 598 
 599         /*
 600          * The attribute PA_RXHSUNTERMCAP specifies whether or not the
 601          * inbound Link supports unterminated line in HS mode. Setting this
 602          * attribute to 1 fixes moving to HS gear.
 603          */
 604         #define UFSHCD_QUIRK_BROKEN_PA_RXHSUNTERMCAP            0x8
 605 
 606         /*
 607          * This quirk needs to be enabled if the host contoller only allows
 608          * accessing the peer dme attributes in AUTO mode (FAST AUTO or
 609          * SLOW AUTO).
 610          */
 611         #define UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE          0x10
 612 
 613         /*
 614          * This quirk needs to be enabled if the host contoller doesn't
 615          * advertise the correct version in UFS_VER register. If this quirk
 616          * is enabled, standard UFS host driver will call the vendor specific
 617          * ops (get_ufs_hci_version) to get the correct version.
 618          */
 619         #define UFSHCD_QUIRK_BROKEN_UFS_HCI_VERSION             0x20
 620 
 621         /*
 622          * This quirk needs to be enabled if the host contoller regards
 623          * resolution of the values of PRDTO and PRDTL in UTRD as byte.
 624          */
 625         #define UFSHCD_QUIRK_PRDT_BYTE_GRAN                     0x80
 626 
 627         /*
 628          * Clear handling for transfer/task request list is just opposite.
 629          */
 630         #define UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR                0x100
 631 
 632         /*
 633          * This quirk needs to be enabled if host controller doesn't allow
 634          * that the interrupt aggregation timer and counter are reset by s/w.
 635          */
 636         #define UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR               0x200
 637 
 638         /*
 639          * This quirks needs to be enabled if host controller cannot be
 640          * enabled via HCE register.
 641          */
 642         #define UFSHCI_QUIRK_BROKEN_HCE                         0x400
 643         unsigned int quirks;    /* Deviations from standard UFSHCI spec. */
 644 
 645         /* Device deviations from standard UFS device spec. */
 646         unsigned int dev_quirks;
 647 
 648         wait_queue_head_t tm_wq;
 649         wait_queue_head_t tm_tag_wq;
 650         unsigned long tm_condition;
 651         unsigned long tm_slots_in_use;
 652 
 653         struct uic_command *active_uic_cmd;
 654         struct mutex uic_cmd_mutex;
 655         struct completion *uic_async_done;
 656 
 657         u32 ufshcd_state;
 658         u32 eh_flags;
 659         u32 intr_mask;
 660         u16 ee_ctrl_mask;
 661         bool is_powered;
 662         bool is_init_prefetch;
 663         struct ufs_init_prefetch init_prefetch_data;
 664 
 665         /* Work Queues */
 666         struct work_struct eh_work;
 667         struct work_struct eeh_work;
 668 
 669         /* HBA Errors */
 670         u32 errors;
 671         u32 uic_error;
 672         u32 saved_err;
 673         u32 saved_uic_err;
 674         struct ufs_stats ufs_stats;
 675         bool silence_err_logs;
 676 
 677         /* Device management request data */
 678         struct ufs_dev_cmd dev_cmd;
 679         ktime_t last_dme_cmd_tstamp;
 680 
 681         /* Keeps information of the UFS device connected to this host */
 682         struct ufs_dev_info dev_info;
 683         bool auto_bkops_enabled;
 684         struct ufs_vreg_info vreg_info;
 685         struct list_head clk_list_head;
 686 
 687         bool wlun_dev_clr_ua;
 688 
 689         /* Number of requests aborts */
 690         int req_abort_count;
 691 
 692         /* Number of lanes available (1 or 2) for Rx/Tx */
 693         u32 lanes_per_direction;
 694         struct ufs_pa_layer_attr pwr_info;
 695         struct ufs_pwr_mode_info max_pwr_info;
 696 
 697         struct ufs_clk_gating clk_gating;
 698         /* Control to enable/disable host capabilities */
 699         u32 caps;
 700         /* Allow dynamic clk gating */
 701 #define UFSHCD_CAP_CLK_GATING   (1 << 0)
 702         /* Allow hiberb8 with clk gating */
 703 #define UFSHCD_CAP_HIBERN8_WITH_CLK_GATING (1 << 1)
 704         /* Allow dynamic clk scaling */
 705 #define UFSHCD_CAP_CLK_SCALING  (1 << 2)
 706         /* Allow auto bkops to enabled during runtime suspend */
 707 #define UFSHCD_CAP_AUTO_BKOPS_SUSPEND (1 << 3)
 708         /*
 709          * This capability allows host controller driver to use the UFS HCI's
 710          * interrupt aggregation capability.
 711          * CAUTION: Enabling this might reduce overall UFS throughput.
 712          */
 713 #define UFSHCD_CAP_INTR_AGGR (1 << 4)
 714         /*
 715          * This capability allows the device auto-bkops to be always enabled
 716          * except during suspend (both runtime and suspend).
 717          * Enabling this capability means that device will always be allowed
 718          * to do background operation when it's active but it might degrade
 719          * the performance of ongoing read/write operations.
 720          */
 721 #define UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND (1 << 5)
 722 
 723         struct devfreq *devfreq;
 724         struct ufs_clk_scaling clk_scaling;
 725         bool is_sys_suspended;
 726 
 727         enum bkops_status urgent_bkops_lvl;
 728         bool is_urgent_bkops_lvl_checked;
 729 
 730         struct rw_semaphore clk_scaling_lock;
 731         struct ufs_desc_size desc_size;
 732         atomic_t scsi_block_reqs_cnt;
 733 
 734         struct device           bsg_dev;
 735         struct request_queue    *bsg_queue;
 736 };
 737 
 738 /* Returns true if clocks can be gated. Otherwise false */
 739 static inline bool ufshcd_is_clkgating_allowed(struct ufs_hba *hba)
 740 {
 741         return hba->caps & UFSHCD_CAP_CLK_GATING;
 742 }
 743 static inline bool ufshcd_can_hibern8_during_gating(struct ufs_hba *hba)
 744 {
 745         return hba->caps & UFSHCD_CAP_HIBERN8_WITH_CLK_GATING;
 746 }
 747 static inline int ufshcd_is_clkscaling_supported(struct ufs_hba *hba)
 748 {
 749         return hba->caps & UFSHCD_CAP_CLK_SCALING;
 750 }
 751 static inline bool ufshcd_can_autobkops_during_suspend(struct ufs_hba *hba)
 752 {
 753         return hba->caps & UFSHCD_CAP_AUTO_BKOPS_SUSPEND;
 754 }
 755 
 756 static inline bool ufshcd_is_intr_aggr_allowed(struct ufs_hba *hba)
 757 {
 758 /* DWC UFS Core has the Interrupt aggregation feature but is not detectable*/
 759 #ifndef CONFIG_SCSI_UFS_DWC
 760         if ((hba->caps & UFSHCD_CAP_INTR_AGGR) &&
 761             !(hba->quirks & UFSHCD_QUIRK_BROKEN_INTR_AGGR))
 762                 return true;
 763         else
 764                 return false;
 765 #else
 766 return true;
 767 #endif
 768 }
 769 
 770 static inline bool ufshcd_is_auto_hibern8_supported(struct ufs_hba *hba)
 771 {
 772         return (hba->capabilities & MASK_AUTO_HIBERN8_SUPPORT);
 773 }
 774 
 775 static inline bool ufshcd_is_auto_hibern8_enabled(struct ufs_hba *hba)
 776 {
 777         return FIELD_GET(UFSHCI_AHIBERN8_TIMER_MASK, hba->ahit) ? true : false;
 778 }
 779 
 780 #define ufshcd_writel(hba, val, reg)    \
 781         writel((val), (hba)->mmio_base + (reg))
 782 #define ufshcd_readl(hba, reg)  \
 783         readl((hba)->mmio_base + (reg))
 784 
 785 /**
 786  * ufshcd_rmwl - read modify write into a register
 787  * @hba - per adapter instance
 788  * @mask - mask to apply on read value
 789  * @val - actual value to write
 790  * @reg - register address
 791  */
 792 static inline void ufshcd_rmwl(struct ufs_hba *hba, u32 mask, u32 val, u32 reg)
 793 {
 794         u32 tmp;
 795 
 796         tmp = ufshcd_readl(hba, reg);
 797         tmp &= ~mask;
 798         tmp |= (val & mask);
 799         ufshcd_writel(hba, tmp, reg);
 800 }
 801 
 802 int ufshcd_alloc_host(struct device *, struct ufs_hba **);
 803 void ufshcd_dealloc_host(struct ufs_hba *);
 804 int ufshcd_init(struct ufs_hba * , void __iomem * , unsigned int);
 805 void ufshcd_remove(struct ufs_hba *);
 806 int ufshcd_wait_for_register(struct ufs_hba *hba, u32 reg, u32 mask,
 807                                 u32 val, unsigned long interval_us,
 808                                 unsigned long timeout_ms, bool can_sleep);
 809 void ufshcd_parse_dev_ref_clk_freq(struct ufs_hba *hba, struct clk *refclk);
 810 
 811 static inline void check_upiu_size(void)
 812 {
 813         BUILD_BUG_ON(ALIGNED_UPIU_SIZE <
 814                 GENERAL_UPIU_REQUEST_SIZE + QUERY_DESC_MAX_SIZE);
 815 }
 816 
 817 /**
 818  * ufshcd_set_variant - set variant specific data to the hba
 819  * @hba - per adapter instance
 820  * @variant - pointer to variant specific data
 821  */
 822 static inline void ufshcd_set_variant(struct ufs_hba *hba, void *variant)
 823 {
 824         BUG_ON(!hba);
 825         hba->priv = variant;
 826 }
 827 
 828 /**
 829  * ufshcd_get_variant - get variant specific data from the hba
 830  * @hba - per adapter instance
 831  */
 832 static inline void *ufshcd_get_variant(struct ufs_hba *hba)
 833 {
 834         BUG_ON(!hba);
 835         return hba->priv;
 836 }
 837 static inline bool ufshcd_keep_autobkops_enabled_except_suspend(
 838                                                         struct ufs_hba *hba)
 839 {
 840         return hba->caps & UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND;
 841 }
 842 
 843 extern int ufshcd_runtime_suspend(struct ufs_hba *hba);
 844 extern int ufshcd_runtime_resume(struct ufs_hba *hba);
 845 extern int ufshcd_runtime_idle(struct ufs_hba *hba);
 846 extern int ufshcd_system_suspend(struct ufs_hba *hba);
 847 extern int ufshcd_system_resume(struct ufs_hba *hba);
 848 extern int ufshcd_shutdown(struct ufs_hba *hba);
 849 extern int ufshcd_dme_set_attr(struct ufs_hba *hba, u32 attr_sel,
 850                                u8 attr_set, u32 mib_val, u8 peer);
 851 extern int ufshcd_dme_get_attr(struct ufs_hba *hba, u32 attr_sel,
 852                                u32 *mib_val, u8 peer);
 853 extern int ufshcd_config_pwr_mode(struct ufs_hba *hba,
 854                         struct ufs_pa_layer_attr *desired_pwr_mode);
 855 
 856 /* UIC command interfaces for DME primitives */
 857 #define DME_LOCAL       0
 858 #define DME_PEER        1
 859 #define ATTR_SET_NOR    0       /* NORMAL */
 860 #define ATTR_SET_ST     1       /* STATIC */
 861 
 862 static inline int ufshcd_dme_set(struct ufs_hba *hba, u32 attr_sel,
 863                                  u32 mib_val)
 864 {
 865         return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
 866                                    mib_val, DME_LOCAL);
 867 }
 868 
 869 static inline int ufshcd_dme_st_set(struct ufs_hba *hba, u32 attr_sel,
 870                                     u32 mib_val)
 871 {
 872         return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
 873                                    mib_val, DME_LOCAL);
 874 }
 875 
 876 static inline int ufshcd_dme_peer_set(struct ufs_hba *hba, u32 attr_sel,
 877                                       u32 mib_val)
 878 {
 879         return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
 880                                    mib_val, DME_PEER);
 881 }
 882 
 883 static inline int ufshcd_dme_peer_st_set(struct ufs_hba *hba, u32 attr_sel,
 884                                          u32 mib_val)
 885 {
 886         return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
 887                                    mib_val, DME_PEER);
 888 }
 889 
 890 static inline int ufshcd_dme_get(struct ufs_hba *hba,
 891                                  u32 attr_sel, u32 *mib_val)
 892 {
 893         return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_LOCAL);
 894 }
 895 
 896 static inline int ufshcd_dme_peer_get(struct ufs_hba *hba,
 897                                       u32 attr_sel, u32 *mib_val)
 898 {
 899         return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_PEER);
 900 }
 901 
 902 static inline bool ufshcd_is_hs_mode(struct ufs_pa_layer_attr *pwr_info)
 903 {
 904         return (pwr_info->pwr_rx == FAST_MODE ||
 905                 pwr_info->pwr_rx == FASTAUTO_MODE) &&
 906                 (pwr_info->pwr_tx == FAST_MODE ||
 907                 pwr_info->pwr_tx == FASTAUTO_MODE);
 908 }
 909 
 910 /* Expose Query-Request API */
 911 int ufshcd_query_descriptor_retry(struct ufs_hba *hba,
 912                                   enum query_opcode opcode,
 913                                   enum desc_idn idn, u8 index,
 914                                   u8 selector,
 915                                   u8 *desc_buf, int *buf_len);
 916 int ufshcd_read_desc_param(struct ufs_hba *hba,
 917                            enum desc_idn desc_id,
 918                            int desc_index,
 919                            u8 param_offset,
 920                            u8 *param_read_buf,
 921                            u8 param_size);
 922 int ufshcd_query_attr(struct ufs_hba *hba, enum query_opcode opcode,
 923                       enum attr_idn idn, u8 index, u8 selector, u32 *attr_val);
 924 int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
 925         enum flag_idn idn, bool *flag_res);
 926 
 927 void ufshcd_auto_hibern8_enable(struct ufs_hba *hba);
 928 
 929 #define SD_ASCII_STD true
 930 #define SD_RAW false
 931 int ufshcd_read_string_desc(struct ufs_hba *hba, u8 desc_index,
 932                             u8 **buf, bool ascii);
 933 
 934 int ufshcd_hold(struct ufs_hba *hba, bool async);
 935 void ufshcd_release(struct ufs_hba *hba);
 936 
 937 int ufshcd_map_desc_id_to_length(struct ufs_hba *hba, enum desc_idn desc_id,
 938         int *desc_length);
 939 
 940 u32 ufshcd_get_local_unipro_ver(struct ufs_hba *hba);
 941 
 942 int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd);
 943 
 944 int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba,
 945                              struct utp_upiu_req *req_upiu,
 946                              struct utp_upiu_req *rsp_upiu,
 947                              int msgcode,
 948                              u8 *desc_buff, int *buff_len,
 949                              enum query_opcode desc_op);
 950 
 951 /* Wrapper functions for safely calling variant operations */
 952 static inline const char *ufshcd_get_var_name(struct ufs_hba *hba)
 953 {
 954         if (hba->vops)
 955                 return hba->vops->name;
 956         return "";
 957 }
 958 
 959 static inline int ufshcd_vops_init(struct ufs_hba *hba)
 960 {
 961         if (hba->vops && hba->vops->init)
 962                 return hba->vops->init(hba);
 963 
 964         return 0;
 965 }
 966 
 967 static inline void ufshcd_vops_exit(struct ufs_hba *hba)
 968 {
 969         if (hba->vops && hba->vops->exit)
 970                 return hba->vops->exit(hba);
 971 }
 972 
 973 static inline u32 ufshcd_vops_get_ufs_hci_version(struct ufs_hba *hba)
 974 {
 975         if (hba->vops && hba->vops->get_ufs_hci_version)
 976                 return hba->vops->get_ufs_hci_version(hba);
 977 
 978         return ufshcd_readl(hba, REG_UFS_VERSION);
 979 }
 980 
 981 static inline int ufshcd_vops_clk_scale_notify(struct ufs_hba *hba,
 982                         bool up, enum ufs_notify_change_status status)
 983 {
 984         if (hba->vops && hba->vops->clk_scale_notify)
 985                 return hba->vops->clk_scale_notify(hba, up, status);
 986         return 0;
 987 }
 988 
 989 static inline int ufshcd_vops_setup_clocks(struct ufs_hba *hba, bool on,
 990                                         enum ufs_notify_change_status status)
 991 {
 992         if (hba->vops && hba->vops->setup_clocks)
 993                 return hba->vops->setup_clocks(hba, on, status);
 994         return 0;
 995 }
 996 
 997 static inline int ufshcd_vops_setup_regulators(struct ufs_hba *hba, bool status)
 998 {
 999         if (hba->vops && hba->vops->setup_regulators)
1000                 return hba->vops->setup_regulators(hba, status);
1001 
1002         return 0;
1003 }
1004 
1005 static inline int ufshcd_vops_hce_enable_notify(struct ufs_hba *hba,
1006                                                 bool status)
1007 {
1008         if (hba->vops && hba->vops->hce_enable_notify)
1009                 return hba->vops->hce_enable_notify(hba, status);
1010 
1011         return 0;
1012 }
1013 static inline int ufshcd_vops_link_startup_notify(struct ufs_hba *hba,
1014                                                 bool status)
1015 {
1016         if (hba->vops && hba->vops->link_startup_notify)
1017                 return hba->vops->link_startup_notify(hba, status);
1018 
1019         return 0;
1020 }
1021 
1022 static inline int ufshcd_vops_pwr_change_notify(struct ufs_hba *hba,
1023                                   bool status,
1024                                   struct ufs_pa_layer_attr *dev_max_params,
1025                                   struct ufs_pa_layer_attr *dev_req_params)
1026 {
1027         if (hba->vops && hba->vops->pwr_change_notify)
1028                 return hba->vops->pwr_change_notify(hba, status,
1029                                         dev_max_params, dev_req_params);
1030 
1031         return -ENOTSUPP;
1032 }
1033 
1034 static inline void ufshcd_vops_setup_xfer_req(struct ufs_hba *hba, int tag,
1035                                         bool is_scsi_cmd)
1036 {
1037         if (hba->vops && hba->vops->setup_xfer_req)
1038                 return hba->vops->setup_xfer_req(hba, tag, is_scsi_cmd);
1039 }
1040 
1041 static inline void ufshcd_vops_setup_task_mgmt(struct ufs_hba *hba,
1042                                         int tag, u8 tm_function)
1043 {
1044         if (hba->vops && hba->vops->setup_task_mgmt)
1045                 return hba->vops->setup_task_mgmt(hba, tag, tm_function);
1046 }
1047 
1048 static inline void ufshcd_vops_hibern8_notify(struct ufs_hba *hba,
1049                                         enum uic_cmd_dme cmd,
1050                                         enum ufs_notify_change_status status)
1051 {
1052         if (hba->vops && hba->vops->hibern8_notify)
1053                 return hba->vops->hibern8_notify(hba, cmd, status);
1054 }
1055 
1056 static inline int ufshcd_vops_apply_dev_quirks(struct ufs_hba *hba,
1057                                                struct ufs_dev_desc *card)
1058 {
1059         if (hba->vops && hba->vops->apply_dev_quirks)
1060                 return hba->vops->apply_dev_quirks(hba, card);
1061         return 0;
1062 }
1063 
1064 static inline int ufshcd_vops_suspend(struct ufs_hba *hba, enum ufs_pm_op op)
1065 {
1066         if (hba->vops && hba->vops->suspend)
1067                 return hba->vops->suspend(hba, op);
1068 
1069         return 0;
1070 }
1071 
1072 static inline int ufshcd_vops_resume(struct ufs_hba *hba, enum ufs_pm_op op)
1073 {
1074         if (hba->vops && hba->vops->resume)
1075                 return hba->vops->resume(hba, op);
1076 
1077         return 0;
1078 }
1079 
1080 static inline void ufshcd_vops_dbg_register_dump(struct ufs_hba *hba)
1081 {
1082         if (hba->vops && hba->vops->dbg_register_dump)
1083                 hba->vops->dbg_register_dump(hba);
1084 }
1085 
1086 static inline void ufshcd_vops_device_reset(struct ufs_hba *hba)
1087 {
1088         if (hba->vops && hba->vops->device_reset)
1089                 hba->vops->device_reset(hba);
1090 }
1091 
1092 extern struct ufs_pm_lvl_states ufs_pm_lvl_states[];
1093 
1094 /*
1095  * ufshcd_scsi_to_upiu_lun - maps scsi LUN to UPIU LUN
1096  * @scsi_lun: scsi LUN id
1097  *
1098  * Returns UPIU LUN id
1099  */
1100 static inline u8 ufshcd_scsi_to_upiu_lun(unsigned int scsi_lun)
1101 {
1102         if (scsi_is_wlun(scsi_lun))
1103                 return (scsi_lun & UFS_UPIU_MAX_UNIT_NUM_ID)
1104                         | UFS_UPIU_WLUN_ID;
1105         else
1106                 return scsi_lun & UFS_UPIU_MAX_UNIT_NUM_ID;
1107 }
1108 
1109 int ufshcd_dump_regs(struct ufs_hba *hba, size_t offset, size_t len,
1110                      const char *prefix);
1111 
1112 #endif /* End of Header */