drivers/scsi/ufs/ufshcd.h

   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  *
   7  * Authors:
   8  *      Santosh Yaraganavi <santosh.sy@samsung.com>
   9  *      Vinayak Holikatti <h.vinayak@samsung.com>
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  * See the COPYING file in the top-level directory or visit
  16  * <http://www.gnu.org/licenses/gpl-2.0.html>
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * This program is provided "AS IS" and "WITH ALL FAULTS" and
  24  * without warranty of any kind. You are solely responsible for
  25  * determining the appropriateness of using and distributing
  26  * the program and assume all risks associated with your exercise
  27  * of rights with respect to the program, including but not limited
  28  * to infringement of third party rights, the risks and costs of
  29  * program errors, damage to or loss of data, programs or equipment,
  30  * and unavailability or interruption of operations. Under no
  31  * circumstances will the contributor of this Program be liable for
  32  * any damages of any kind arising from your use or distribution of
  33  * this program.
  34  */
  35
  36 #ifndef _UFSHCD_H
  37 #define _UFSHCD_H
  38
  39 #include <linux/module.h>
  40 #include <linux/kernel.h>
  41 #include <linux/init.h>
  42 #include <linux/interrupt.h>
  43 #include <linux/io.h>
  44 #include <linux/delay.h>
  45 #include <linux/slab.h>
  46 #include <linux/spinlock.h>
  47 #include <linux/workqueue.h>
  48 #include <linux/errno.h>
  49 #include <linux/types.h>
  50 #include <linux/wait.h>
  51 #include <linux/bitops.h>
  52 #include <linux/pm_runtime.h>
  53 #include <linux/clk.h>
  54 #include <linux/completion.h>
  55 #include <linux/regulator/consumer.h>
  56
  57 #include <asm/irq.h>
  58 #include <asm/byteorder.h>
  59 #include <scsi/scsi.h>
  60 #include <scsi/scsi_cmnd.h>
  61 #include <scsi/scsi_host.h>
  62 #include <scsi/scsi_tcq.h>
  63 #include <scsi/scsi_dbg.h>
  64 #include <scsi/scsi_eh.h>
  65
  66 #include "ufs.h"
  67 #include "ufshci.h"
  68
  69 #define UFSHCD "ufshcd"
  70 #define UFSHCD_DRIVER_VERSION "0.2"
  71
  72 struct ufs_hba;
  73
  74 enum dev_cmd_type {
  75         DEV_CMD_TYPE_NOP                = 0x0,
  76         DEV_CMD_TYPE_QUERY              = 0x1,
  77 };
  78
  79 /**
  80  * struct uic_command - UIC command structure
  81  * @command: UIC command
  82  * @argument1: UIC command argument 1
  83  * @argument2: UIC command argument 2
  84  * @argument3: UIC command argument 3
  85  * @cmd_active: Indicate if UIC command is outstanding
  86  * @result: UIC command result
  87  * @done: UIC command completion
  88  */
  89 struct uic_command {
  90         u32 command;
  91         u32 argument1;
  92         u32 argument2;
  93         u32 argument3;
  94         int cmd_active;
  95         int result;
  96         struct completion done;
  97 };
  98
  99 /* Used to differentiate the power management options */
 100 enum ufs_pm_op {
 101         UFS_RUNTIME_PM,
 102         UFS_SYSTEM_PM,
 103         UFS_SHUTDOWN_PM,
 104 };
 105
 106 #define ufshcd_is_runtime_pm(op) ((op) == UFS_RUNTIME_PM)
 107 #define ufshcd_is_system_pm(op) ((op) == UFS_SYSTEM_PM)
 108 #define ufshcd_is_shutdown_pm(op) ((op) == UFS_SHUTDOWN_PM)
 109
 110 /* Host <-> Device UniPro Link state */
 111 enum uic_link_state {
 112         UIC_LINK_OFF_STATE      = 0, /* Link powered down or disabled */
 113         UIC_LINK_ACTIVE_STATE   = 1, /* Link is in Fast/Slow/Sleep state */
 114         UIC_LINK_HIBERN8_STATE  = 2, /* Link is in Hibernate state */
 115 };
 116
 117 #define ufshcd_is_link_off(hba) ((hba)->uic_link_state == UIC_LINK_OFF_STATE)
 118 #define ufshcd_is_link_active(hba) ((hba)->uic_link_state == \
 119                                     UIC_LINK_ACTIVE_STATE)
 120 #define ufshcd_is_link_hibern8(hba) ((hba)->uic_link_state == \
 121                                     UIC_LINK_HIBERN8_STATE)
 122 #define ufshcd_set_link_off(hba) ((hba)->uic_link_state = UIC_LINK_OFF_STATE)
 123 #define ufshcd_set_link_active(hba) ((hba)->uic_link_state = \
 124                                     UIC_LINK_ACTIVE_STATE)
 125 #define ufshcd_set_link_hibern8(hba) ((hba)->uic_link_state = \
 126                                     UIC_LINK_HIBERN8_STATE)
 127
 128 /*
 129  * UFS Power management levels.
 130  * Each level is in increasing order of power savings.
 131  */
 132 enum ufs_pm_level {
 133         UFS_PM_LVL_0, /* UFS_ACTIVE_PWR_MODE, UIC_LINK_ACTIVE_STATE */
 134         UFS_PM_LVL_1, /* UFS_ACTIVE_PWR_MODE, UIC_LINK_HIBERN8_STATE */
 135         UFS_PM_LVL_2, /* UFS_SLEEP_PWR_MODE, UIC_LINK_ACTIVE_STATE */
 136         UFS_PM_LVL_3, /* UFS_SLEEP_PWR_MODE, UIC_LINK_HIBERN8_STATE */
 137         UFS_PM_LVL_4, /* UFS_POWERDOWN_PWR_MODE, UIC_LINK_HIBERN8_STATE */
 138         UFS_PM_LVL_5, /* UFS_POWERDOWN_PWR_MODE, UIC_LINK_OFF_STATE */
 139         UFS_PM_LVL_MAX
 140 };
 141
 142 struct ufs_pm_lvl_states {
 143         enum ufs_dev_pwr_mode dev_state;
 144         enum uic_link_state link_state;
 145 };
 146
 147 /**
 148  * struct ufshcd_lrb - local reference block
 149  * @utr_descriptor_ptr: UTRD address of the command
 150  * @ucd_req_ptr: UCD address of the command
 151  * @ucd_rsp_ptr: Response UPIU address for this command
 152  * @ucd_prdt_ptr: PRDT address of the command
 153  * @cmd: pointer to SCSI command
 154  * @sense_buffer: pointer to sense buffer address of the SCSI command
 155  * @sense_bufflen: Length of the sense buffer
 156  * @scsi_status: SCSI status of the command
 157  * @command_type: SCSI, UFS, Query.
 158  * @task_tag: Task tag of the command
 159  * @lun: LUN of the command
 160  * @intr_cmd: Interrupt command (doesn't participate in interrupt aggregation)
 161  */
 162 struct ufshcd_lrb {
 163         struct utp_transfer_req_desc *utr_descriptor_ptr;
 164         struct utp_upiu_req *ucd_req_ptr;
 165         struct utp_upiu_rsp *ucd_rsp_ptr;
 166         struct ufshcd_sg_entry *ucd_prdt_ptr;
 167
 168         struct scsi_cmnd *cmd;
 169         u8 *sense_buffer;
 170         unsigned int sense_bufflen;
 171         int scsi_status;
 172
 173         int command_type;
 174         int task_tag;
 175         u8 lun; /* UPIU LUN id field is only 8-bit wide */
 176         bool intr_cmd;
 177 };
 178
 179 /**
 180  * struct ufs_query - holds relevent data structures for query request
 181  * @request: request upiu and function
 182  * @descriptor: buffer for sending/receiving descriptor
 183  * @response: response upiu and response
 184  */
 185 struct ufs_query {
 186         struct ufs_query_req request;
 187         u8 *descriptor;
 188         struct ufs_query_res response;
 189 };
 190
 191 /**
 192  * struct ufs_dev_cmd - all assosiated fields with device management commands
 193  * @type: device management command type - Query, NOP OUT
 194  * @lock: lock to allow one command at a time
 195  * @complete: internal commands completion
 196  * @tag_wq: wait queue until free command slot is available
 197  */
 198 struct ufs_dev_cmd {
 199         enum dev_cmd_type type;
 200         struct mutex lock;
 201         struct completion *complete;
 202         wait_queue_head_t tag_wq;
 203         struct ufs_query query;
 204 };
 205
 206 /**
 207  * struct ufs_clk_info - UFS clock related info
 208  * @list: list headed by hba->clk_list_head
 209  * @clk: clock node
 210  * @name: clock name
 211  * @max_freq: maximum frequency supported by the clock
 212  * @min_freq: min frequency that can be used for clock scaling
 213  * @curr_freq: indicates the current frequency that it is set to
 214  * @enabled: variable to check against multiple enable/disable
 215  */
 216 struct ufs_clk_info {
 217         struct list_head list;
 218         struct clk *clk;
 219         const char *name;
 220         u32 max_freq;
 221         u32 min_freq;
 222         u32 curr_freq;
 223         bool enabled;
 224 };
 225
 226 #define PRE_CHANGE      0
 227 #define POST_CHANGE     1
 228
 229 struct ufs_pa_layer_attr {
 230         u32 gear_rx;
 231         u32 gear_tx;
 232         u32 lane_rx;
 233         u32 lane_tx;
 234         u32 pwr_rx;
 235         u32 pwr_tx;
 236         u32 hs_rate;
 237 };
 238
 239 struct ufs_pwr_mode_info {
 240         bool is_valid;
 241         struct ufs_pa_layer_attr info;
 242 };
 243
 244 /**
 245  * struct ufs_hba_variant_ops - variant specific callbacks
 246  * @name: variant name
 247  * @init: called when the driver is initialized
 248  * @exit: called to cleanup everything done in init
 249  * @get_ufs_hci_version: called to get UFS HCI version
 250  * @clk_scale_notify: notifies that clks are scaled up/down
 251  * @setup_clocks: called before touching any of the controller registers
 252  * @setup_regulators: called before accessing the host controller
 253  * @hce_enable_notify: called before and after HCE enable bit is set to allow
 254  *                     variant specific Uni-Pro initialization.
 255  * @link_startup_notify: called before and after Link startup is carried out
 256  *                       to allow variant specific Uni-Pro initialization.
 257  * @pwr_change_notify: called before and after a power mode change
 258  *                      is carried out to allow vendor spesific capabilities
 259  *                      to be set.
 260  * @suspend: called during host controller PM callback
 261  * @resume: called during host controller PM callback
 262  */
 263 struct ufs_hba_variant_ops {
 264         const char *name;
 265         int     (*init)(struct ufs_hba *);
 266         void    (*exit)(struct ufs_hba *);
 267         u32     (*get_ufs_hci_version)(struct ufs_hba *);
 268         void    (*clk_scale_notify)(struct ufs_hba *);
 269         int     (*setup_clocks)(struct ufs_hba *, bool);
 270         int     (*setup_regulators)(struct ufs_hba *, bool);
 271         int     (*hce_enable_notify)(struct ufs_hba *, bool);
 272         int     (*link_startup_notify)(struct ufs_hba *, bool);
 273         int     (*pwr_change_notify)(struct ufs_hba *,
 274                                         bool, struct ufs_pa_layer_attr *,
 275                                         struct ufs_pa_layer_attr *);
 276         int     (*suspend)(struct ufs_hba *, enum ufs_pm_op);
 277         int     (*resume)(struct ufs_hba *, enum ufs_pm_op);
 278 };
 279
 280 /* clock gating state  */
 281 enum clk_gating_state {
 282         CLKS_OFF,
 283         CLKS_ON,
 284         REQ_CLKS_OFF,
 285         REQ_CLKS_ON,
 286 };
 287
 288 /**
 289  * struct ufs_clk_gating - UFS clock gating related info
 290  * @gate_work: worker to turn off clocks after some delay as specified in
 291  * delay_ms
 292  * @ungate_work: worker to turn on clocks that will be used in case of
 293  * interrupt context
 294  * @state: the current clocks state
 295  * @delay_ms: gating delay in ms
 296  * @is_suspended: clk gating is suspended when set to 1 which can be used
 297  * during suspend/resume
 298  * @delay_attr: sysfs attribute to control delay_attr
 299  * @active_reqs: number of requests that are pending and should be waited for
 300  * completion before gating clocks.
 301  */
 302 struct ufs_clk_gating {
 303         struct delayed_work gate_work;
 304         struct work_struct ungate_work;
 305         enum clk_gating_state state;
 306         unsigned long delay_ms;
 307         bool is_suspended;
 308         struct device_attribute delay_attr;
 309         int active_reqs;
 310 };
 311
 312 struct ufs_clk_scaling {
 313         ktime_t  busy_start_t;
 314         bool is_busy_started;
 315         unsigned long  tot_busy_t;
 316         unsigned long window_start_t;
 317 };
 318
 319 /**
 320  * struct ufs_init_prefetch - contains data that is pre-fetched once during
 321  * initialization
 322  * @icc_level: icc level which was read during initialization
 323  */
 324 struct ufs_init_prefetch {
 325         u32 icc_level;
 326 };
 327
 328 /**
 329  * struct ufs_hba - per adapter private structure
 330  * @mmio_base: UFSHCI base register address
 331  * @ucdl_base_addr: UFS Command Descriptor base address
 332  * @utrdl_base_addr: UTP Transfer Request Descriptor base address
 333  * @utmrdl_base_addr: UTP Task Management Descriptor base address
 334  * @ucdl_dma_addr: UFS Command Descriptor DMA address
 335  * @utrdl_dma_addr: UTRDL DMA address
 336  * @utmrdl_dma_addr: UTMRDL DMA address
 337  * @host: Scsi_Host instance of the driver
 338  * @dev: device handle
 339  * @lrb: local reference block
 340  * @lrb_in_use: lrb in use
 341  * @outstanding_tasks: Bits representing outstanding task requests
 342  * @outstanding_reqs: Bits representing outstanding transfer requests
 343  * @capabilities: UFS Controller Capabilities
 344  * @nutrs: Transfer Request Queue depth supported by controller
 345  * @nutmrs: Task Management Queue depth supported by controller
 346  * @ufs_version: UFS Version to which controller complies
 347  * @vops: pointer to variant specific operations
 348  * @priv: pointer to variant specific private data
 349  * @irq: Irq number of the controller
 350  * @active_uic_cmd: handle of active UIC command
 351  * @uic_cmd_mutex: mutex for uic command
 352  * @tm_wq: wait queue for task management
 353  * @tm_tag_wq: wait queue for free task management slots
 354  * @tm_slots_in_use: bit map of task management request slots in use
 355  * @pwr_done: completion for power mode change
 356  * @tm_condition: condition variable for task management
 357  * @ufshcd_state: UFSHCD states
 358  * @eh_flags: Error handling flags
 359  * @intr_mask: Interrupt Mask Bits
 360  * @ee_ctrl_mask: Exception event control mask
 361  * @is_powered: flag to check if HBA is powered
 362  * @is_init_prefetch: flag to check if data was pre-fetched in initialization
 363  * @init_prefetch_data: data pre-fetched during initialization
 364  * @eh_work: Worker to handle UFS errors that require s/w attention
 365  * @eeh_work: Worker to handle exception events
 366  * @errors: HBA errors
 367  * @uic_error: UFS interconnect layer error status
 368  * @saved_err: sticky error mask
 369  * @saved_uic_err: sticky UIC error mask
 370  * @dev_cmd: ufs device management command information
 371  * @last_dme_cmd_tstamp: time stamp of the last completed DME command
 372  * @auto_bkops_enabled: to track whether bkops is enabled in device
 373  * @vreg_info: UFS device voltage regulator information
 374  * @clk_list_head: UFS host controller clocks list node head
 375  * @pwr_info: holds current power mode
 376  * @max_pwr_info: keeps the device max valid pwm
 377  */
 378 struct ufs_hba {
 379         void __iomem *mmio_base;
 380
 381         /* Virtual memory reference */
 382         struct utp_transfer_cmd_desc *ucdl_base_addr;
 383         struct utp_transfer_req_desc *utrdl_base_addr;
 384         struct utp_task_req_desc *utmrdl_base_addr;
 385
 386         /* DMA memory reference */
 387         dma_addr_t ucdl_dma_addr;
 388         dma_addr_t utrdl_dma_addr;
 389         dma_addr_t utmrdl_dma_addr;
 390
 391         struct Scsi_Host *host;
 392         struct device *dev;
 393         /*
 394          * This field is to keep a reference to "scsi_device" corresponding to
 395          * "UFS device" W-LU.
 396          */
 397         struct scsi_device *sdev_ufs_device;
 398
 399         enum ufs_dev_pwr_mode curr_dev_pwr_mode;
 400         enum uic_link_state uic_link_state;
 401         /* Desired UFS power management level during runtime PM */
 402         enum ufs_pm_level rpm_lvl;
 403         /* Desired UFS power management level during system PM */
 404         enum ufs_pm_level spm_lvl;
 405         int pm_op_in_progress;
 406
 407         struct ufshcd_lrb *lrb;
 408         unsigned long lrb_in_use;
 409
 410         unsigned long outstanding_tasks;
 411         unsigned long outstanding_reqs;
 412
 413         u32 capabilities;
 414         int nutrs;
 415         int nutmrs;
 416         u32 ufs_version;
 417         struct ufs_hba_variant_ops *vops;
 418         void *priv;
 419         unsigned int irq;
 420         bool is_irq_enabled;
 421
 422         /* Interrupt aggregation support is broken */
 423         #define UFSHCD_QUIRK_BROKEN_INTR_AGGR                   UFS_BIT(0)
 424
 425         /*
 426          * delay before each dme command is required as the unipro
 427          * layer has shown instabilities
 428          */
 429         #define UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS              UFS_BIT(1)
 430
 431         /*
 432          * If UFS host controller is having issue in processing LCC (Line
 433          * Control Command) coming from device then enable this quirk.
 434          * When this quirk is enabled, host controller driver should disable
 435          * the LCC transmission on UFS device (by clearing TX_LCC_ENABLE
 436          * attribute of device to 0).
 437          */
 438         #define UFSHCD_QUIRK_BROKEN_LCC                         UFS_BIT(2)
 439
 440         /*
 441          * The attribute PA_RXHSUNTERMCAP specifies whether or not the
 442          * inbound Link supports unterminated line in HS mode. Setting this
 443          * attribute to 1 fixes moving to HS gear.
 444          */
 445         #define UFSHCD_QUIRK_BROKEN_PA_RXHSUNTERMCAP            UFS_BIT(3)
 446
 447         /*
 448          * This quirk needs to be enabled if the host contoller only allows
 449          * accessing the peer dme attributes in AUTO mode (FAST AUTO or
 450          * SLOW AUTO).
 451          */
 452         #define UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE          UFS_BIT(4)
 453
 454         /*
 455          * This quirk needs to be enabled if the host contoller doesn't
 456          * advertise the correct version in UFS_VER register. If this quirk
 457          * is enabled, standard UFS host driver will call the vendor specific
 458          * ops (get_ufs_hci_version) to get the correct version.
 459          */
 460         #define UFSHCD_QUIRK_BROKEN_UFS_HCI_VERSION             UFS_BIT(5)
 461
 462         unsigned int quirks;    /* Deviations from standard UFSHCI spec. */
 463
 464         wait_queue_head_t tm_wq;
 465         wait_queue_head_t tm_tag_wq;
 466         unsigned long tm_condition;
 467         unsigned long tm_slots_in_use;
 468
 469         struct uic_command *active_uic_cmd;
 470         struct mutex uic_cmd_mutex;
 471         struct completion *uic_async_done;
 472
 473         u32 ufshcd_state;
 474         u32 eh_flags;
 475         u32 intr_mask;
 476         u16 ee_ctrl_mask;
 477         bool is_powered;
 478         bool is_init_prefetch;
 479         struct ufs_init_prefetch init_prefetch_data;
 480
 481         /* Work Queues */
 482         struct work_struct eh_work;
 483         struct work_struct eeh_work;
 484
 485         /* HBA Errors */
 486         u32 errors;
 487         u32 uic_error;
 488         u32 saved_err;
 489         u32 saved_uic_err;
 490
 491         /* Device management request data */
 492         struct ufs_dev_cmd dev_cmd;
 493         ktime_t last_dme_cmd_tstamp;
 494
 495         /* Keeps information of the UFS device connected to this host */
 496         struct ufs_dev_info dev_info;
 497         bool auto_bkops_enabled;
 498         struct ufs_vreg_info vreg_info;
 499         struct list_head clk_list_head;
 500
 501         bool wlun_dev_clr_ua;
 502
 503         struct ufs_pa_layer_attr pwr_info;
 504         struct ufs_pwr_mode_info max_pwr_info;
 505
 506         struct ufs_clk_gating clk_gating;
 507         /* Control to enable/disable host capabilities */
 508         u32 caps;
 509         /* Allow dynamic clk gating */
 510 #define UFSHCD_CAP_CLK_GATING   (1 << 0)
 511         /* Allow hiberb8 with clk gating */
 512 #define UFSHCD_CAP_HIBERN8_WITH_CLK_GATING (1 << 1)
 513         /* Allow dynamic clk scaling */
 514 #define UFSHCD_CAP_CLK_SCALING  (1 << 2)
 515         /* Allow auto bkops to enabled during runtime suspend */
 516 #define UFSHCD_CAP_AUTO_BKOPS_SUSPEND (1 << 3)
 517         /*
 518          * This capability allows host controller driver to use the UFS HCI's
 519          * interrupt aggregation capability.
 520          * CAUTION: Enabling this might reduce overall UFS throughput.
 521          */
 522 #define UFSHCD_CAP_INTR_AGGR (1 << 4)
 523
 524         struct devfreq *devfreq;
 525         struct ufs_clk_scaling clk_scaling;
 526         bool is_sys_suspended;
 527 };
 528
 529 /* Returns true if clocks can be gated. Otherwise false */
 530 static inline bool ufshcd_is_clkgating_allowed(struct ufs_hba *hba)
 531 {
 532         return hba->caps & UFSHCD_CAP_CLK_GATING;
 533 }
 534 static inline bool ufshcd_can_hibern8_during_gating(struct ufs_hba *hba)
 535 {
 536         return hba->caps & UFSHCD_CAP_HIBERN8_WITH_CLK_GATING;
 537 }
 538 static inline int ufshcd_is_clkscaling_enabled(struct ufs_hba *hba)
 539 {
 540         return hba->caps & UFSHCD_CAP_CLK_SCALING;
 541 }
 542 static inline bool ufshcd_can_autobkops_during_suspend(struct ufs_hba *hba)
 543 {
 544         return hba->caps & UFSHCD_CAP_AUTO_BKOPS_SUSPEND;
 545 }
 546
 547 static inline bool ufshcd_is_intr_aggr_allowed(struct ufs_hba *hba)
 548 {
 549         if ((hba->caps & UFSHCD_CAP_INTR_AGGR) &&
 550             !(hba->quirks & UFSHCD_QUIRK_BROKEN_INTR_AGGR))
 551                 return true;
 552         else
 553                 return false;
 554 }
 555
 556 #define ufshcd_writel(hba, val, reg)    \
 557         writel((val), (hba)->mmio_base + (reg))
 558 #define ufshcd_readl(hba, reg)  \
 559         readl((hba)->mmio_base + (reg))
 560
 561 /**
 562  * ufshcd_rmwl - read modify write into a register
 563  * @hba - per adapter instance
 564  * @mask - mask to apply on read value
 565  * @val - actual value to write
 566  * @reg - register address
 567  */
 568 static inline void ufshcd_rmwl(struct ufs_hba *hba, u32 mask, u32 val, u32 reg)
 569 {
 570         u32 tmp;
 571
 572         tmp = ufshcd_readl(hba, reg);
 573         tmp &= ~mask;
 574         tmp |= (val & mask);
 575         ufshcd_writel(hba, tmp, reg);
 576 }
 577
 578 int ufshcd_alloc_host(struct device *, struct ufs_hba **);
 579 int ufshcd_init(struct ufs_hba * , void __iomem * , unsigned int);
 580 void ufshcd_remove(struct ufs_hba *);
 581
 582 /**
 583  * ufshcd_hba_stop - Send controller to reset state
 584  * @hba: per adapter instance
 585  */
 586 static inline void ufshcd_hba_stop(struct ufs_hba *hba)
 587 {
 588         ufshcd_writel(hba, CONTROLLER_DISABLE,  REG_CONTROLLER_ENABLE);
 589 }
 590
 591 static inline void check_upiu_size(void)
 592 {
 593         BUILD_BUG_ON(ALIGNED_UPIU_SIZE <
 594                 GENERAL_UPIU_REQUEST_SIZE + QUERY_DESC_MAX_SIZE);
 595 }
 596
 597 extern int ufshcd_runtime_suspend(struct ufs_hba *hba);
 598 extern int ufshcd_runtime_resume(struct ufs_hba *hba);
 599 extern int ufshcd_runtime_idle(struct ufs_hba *hba);
 600 extern int ufshcd_system_suspend(struct ufs_hba *hba);
 601 extern int ufshcd_system_resume(struct ufs_hba *hba);
 602 extern int ufshcd_shutdown(struct ufs_hba *hba);
 603 extern int ufshcd_dme_set_attr(struct ufs_hba *hba, u32 attr_sel,
 604                                u8 attr_set, u32 mib_val, u8 peer);
 605 extern int ufshcd_dme_get_attr(struct ufs_hba *hba, u32 attr_sel,
 606                                u32 *mib_val, u8 peer);
 607
 608 /* UIC command interfaces for DME primitives */
 609 #define DME_LOCAL       0
 610 #define DME_PEER        1
 611 #define ATTR_SET_NOR    0       /* NORMAL */
 612 #define ATTR_SET_ST     1       /* STATIC */
 613
 614 static inline int ufshcd_dme_set(struct ufs_hba *hba, u32 attr_sel,
 615                                  u32 mib_val)
 616 {
 617         return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
 618                                    mib_val, DME_LOCAL);
 619 }
 620
 621 static inline int ufshcd_dme_st_set(struct ufs_hba *hba, u32 attr_sel,
 622                                     u32 mib_val)
 623 {
 624         return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
 625                                    mib_val, DME_LOCAL);
 626 }
 627
 628 static inline int ufshcd_dme_peer_set(struct ufs_hba *hba, u32 attr_sel,
 629                                       u32 mib_val)
 630 {
 631         return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
 632                                    mib_val, DME_PEER);
 633 }
 634
 635 static inline int ufshcd_dme_peer_st_set(struct ufs_hba *hba, u32 attr_sel,
 636                                          u32 mib_val)
 637 {
 638         return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
 639                                    mib_val, DME_PEER);
 640 }
 641
 642 static inline int ufshcd_dme_get(struct ufs_hba *hba,
 643                                  u32 attr_sel, u32 *mib_val)
 644 {
 645         return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_LOCAL);
 646 }
 647
 648 static inline int ufshcd_dme_peer_get(struct ufs_hba *hba,
 649                                       u32 attr_sel, u32 *mib_val)
 650 {
 651         return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_PEER);
 652 }
 653
 654 int ufshcd_hold(struct ufs_hba *hba, bool async);
 655 void ufshcd_release(struct ufs_hba *hba);
 656 #endif /* End of Header */