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 * @clk_scale_notify: notifies that clks are scaled up/down
250 * @setup_clocks: called before touching any of the controller registers
251 * @setup_regulators: called before accessing the host controller
252 * @hce_enable_notify: called before and after HCE enable bit is set to allow
253 * variant specific Uni-Pro initialization.
254 * @link_startup_notify: called before and after Link startup is carried out
255 * to allow variant specific Uni-Pro initialization.
256 * @pwr_change_notify: called before and after a power mode change
257 * is carried out to allow vendor spesific capabilities
258 * to be set.
259 * @suspend: called during host controller PM callback
260 * @resume: called during host controller PM callback
261 */
262 struct ufs_hba_variant_ops {
263 const char *name;
264 int (*init)(struct ufs_hba *);
265 void (*exit)(struct ufs_hba *);
266 void (*clk_scale_notify)(struct ufs_hba *);
267 int (*setup_clocks)(struct ufs_hba *, bool);
268 int (*setup_regulators)(struct ufs_hba *, bool);
269 int (*hce_enable_notify)(struct ufs_hba *, bool);
270 int (*link_startup_notify)(struct ufs_hba *, bool);
271 int (*pwr_change_notify)(struct ufs_hba *,
272 bool, struct ufs_pa_layer_attr *,
273 struct ufs_pa_layer_attr *);
274 int (*suspend)(struct ufs_hba *, enum ufs_pm_op);
275 int (*resume)(struct ufs_hba *, enum ufs_pm_op);
276 };
277
278 /* clock gating state */
279 enum clk_gating_state {
280 CLKS_OFF,
281 CLKS_ON,
282 REQ_CLKS_OFF,
283 REQ_CLKS_ON,
284 };
285
286 /**
287 * struct ufs_clk_gating - UFS clock gating related info
288 * @gate_work: worker to turn off clocks after some delay as specified in
289 * delay_ms
290 * @ungate_work: worker to turn on clocks that will be used in case of
291 * interrupt context
292 * @state: the current clocks state
293 * @delay_ms: gating delay in ms
294 * @is_suspended: clk gating is suspended when set to 1 which can be used
295 * during suspend/resume
296 * @delay_attr: sysfs attribute to control delay_attr
297 * @active_reqs: number of requests that are pending and should be waited for
298 * completion before gating clocks.
299 */
300 struct ufs_clk_gating {
301 struct delayed_work gate_work;
302 struct work_struct ungate_work;
303 enum clk_gating_state state;
304 unsigned long delay_ms;
305 bool is_suspended;
306 struct device_attribute delay_attr;
307 int active_reqs;
308 };
309
310 struct ufs_clk_scaling {
311 ktime_t busy_start_t;
312 bool is_busy_started;
313 unsigned long tot_busy_t;
314 unsigned long window_start_t;
315 };
316
317 /**
318 * struct ufs_init_prefetch - contains data that is pre-fetched once during
319 * initialization
320 * @icc_level: icc level which was read during initialization
321 */
322 struct ufs_init_prefetch {
323 u32 icc_level;
324 };
325
326 /**
327 * struct ufs_hba - per adapter private structure
328 * @mmio_base: UFSHCI base register address
329 * @ucdl_base_addr: UFS Command Descriptor base address
330 * @utrdl_base_addr: UTP Transfer Request Descriptor base address
331 * @utmrdl_base_addr: UTP Task Management Descriptor base address
332 * @ucdl_dma_addr: UFS Command Descriptor DMA address
333 * @utrdl_dma_addr: UTRDL DMA address
334 * @utmrdl_dma_addr: UTMRDL DMA address
335 * @host: Scsi_Host instance of the driver
336 * @dev: device handle
337 * @lrb: local reference block
338 * @lrb_in_use: lrb in use
339 * @outstanding_tasks: Bits representing outstanding task requests
340 * @outstanding_reqs: Bits representing outstanding transfer requests
341 * @capabilities: UFS Controller Capabilities
342 * @nutrs: Transfer Request Queue depth supported by controller
343 * @nutmrs: Task Management Queue depth supported by controller
344 * @ufs_version: UFS Version to which controller complies
345 * @vops: pointer to variant specific operations
346 * @priv: pointer to variant specific private data
347 * @irq: Irq number of the controller
348 * @active_uic_cmd: handle of active UIC command
349 * @uic_cmd_mutex: mutex for uic command
350 * @tm_wq: wait queue for task management
351 * @tm_tag_wq: wait queue for free task management slots
352 * @tm_slots_in_use: bit map of task management request slots in use
353 * @pwr_done: completion for power mode change
354 * @tm_condition: condition variable for task management
355 * @ufshcd_state: UFSHCD states
356 * @eh_flags: Error handling flags
357 * @intr_mask: Interrupt Mask Bits
358 * @ee_ctrl_mask: Exception event control mask
359 * @is_powered: flag to check if HBA is powered
360 * @is_init_prefetch: flag to check if data was pre-fetched in initialization
361 * @init_prefetch_data: data pre-fetched during initialization
362 * @eh_work: Worker to handle UFS errors that require s/w attention
363 * @eeh_work: Worker to handle exception events
364 * @errors: HBA errors
365 * @uic_error: UFS interconnect layer error status
366 * @saved_err: sticky error mask
367 * @saved_uic_err: sticky UIC error mask
368 * @dev_cmd: ufs device management command information
369 * @auto_bkops_enabled: to track whether bkops is enabled in device
370 * @vreg_info: UFS device voltage regulator information
371 * @clk_list_head: UFS host controller clocks list node head
372 * @pwr_info: holds current power mode
373 * @max_pwr_info: keeps the device max valid pwm
374 */
375 struct ufs_hba {
376 void __iomem *mmio_base;
377
378 /* Virtual memory reference */
379 struct utp_transfer_cmd_desc *ucdl_base_addr;
380 struct utp_transfer_req_desc *utrdl_base_addr;
381 struct utp_task_req_desc *utmrdl_base_addr;
382
383 /* DMA memory reference */
384 dma_addr_t ucdl_dma_addr;
385 dma_addr_t utrdl_dma_addr;
386 dma_addr_t utmrdl_dma_addr;
387
388 struct Scsi_Host *host;
389 struct device *dev;
390 /*
391 * This field is to keep a reference to "scsi_device" corresponding to
392 * "UFS device" W-LU.
393 */
394 struct scsi_device *sdev_ufs_device;
395
396 enum ufs_dev_pwr_mode curr_dev_pwr_mode;
397 enum uic_link_state uic_link_state;
398 /* Desired UFS power management level during runtime PM */
399 enum ufs_pm_level rpm_lvl;
400 /* Desired UFS power management level during system PM */
401 enum ufs_pm_level spm_lvl;
402 int pm_op_in_progress;
403
404 struct ufshcd_lrb *lrb;
405 unsigned long lrb_in_use;
406
407 unsigned long outstanding_tasks;
408 unsigned long outstanding_reqs;
409
410 u32 capabilities;
411 int nutrs;
412 int nutmrs;
413 u32 ufs_version;
414 struct ufs_hba_variant_ops *vops;
415 void *priv;
416 unsigned int irq;
417 bool is_irq_enabled;
418
419
420 wait_queue_head_t tm_wq;
421 wait_queue_head_t tm_tag_wq;
422 unsigned long tm_condition;
423 unsigned long tm_slots_in_use;
424
425 struct uic_command *active_uic_cmd;
426 struct mutex uic_cmd_mutex;
427 struct completion *uic_async_done;
428
429 u32 ufshcd_state;
430 u32 eh_flags;
431 u32 intr_mask;
432 u16 ee_ctrl_mask;
433 bool is_powered;
434 bool is_init_prefetch;
435 struct ufs_init_prefetch init_prefetch_data;
436
437 /* Work Queues */
438 struct work_struct eh_work;
439 struct work_struct eeh_work;
440
441 /* HBA Errors */
442 u32 errors;
443 u32 uic_error;
444 u32 saved_err;
445 u32 saved_uic_err;
446
447 /* Device management request data */
448 struct ufs_dev_cmd dev_cmd;
449
450 /* Keeps information of the UFS device connected to this host */
451 struct ufs_dev_info dev_info;
452 bool auto_bkops_enabled;
453 struct ufs_vreg_info vreg_info;
454 struct list_head clk_list_head;
455
456 bool wlun_dev_clr_ua;
457
458 struct ufs_pa_layer_attr pwr_info;
459 struct ufs_pwr_mode_info max_pwr_info;
460
461 struct ufs_clk_gating clk_gating;
462 /* Control to enable/disable host capabilities */
463 u32 caps;
464 /* Allow dynamic clk gating */
465 #define UFSHCD_CAP_CLK_GATING (1 << 0)
466 /* Allow hiberb8 with clk gating */
467 #define UFSHCD_CAP_HIBERN8_WITH_CLK_GATING (1 << 1)
468 /* Allow dynamic clk scaling */
469 #define UFSHCD_CAP_CLK_SCALING (1 << 2)
470 /* Allow auto bkops to enabled during runtime suspend */
471 #define UFSHCD_CAP_AUTO_BKOPS_SUSPEND (1 << 3)
472
473 struct devfreq *devfreq;
474 struct ufs_clk_scaling clk_scaling;
475 bool is_sys_suspended;
476
477 int latency_hist_enabled;
478 struct io_latency_state io_lat_read;
479 struct io_latency_state io_lat_write;
480 };
481
482 /* Returns true if clocks can be gated. Otherwise false */
ufshcd_is_clkgating_allowed(struct ufs_hba * hba)483 static inline bool ufshcd_is_clkgating_allowed(struct ufs_hba *hba)
484 {
485 return hba->caps & UFSHCD_CAP_CLK_GATING;
486 }
ufshcd_can_hibern8_during_gating(struct ufs_hba * hba)487 static inline bool ufshcd_can_hibern8_during_gating(struct ufs_hba *hba)
488 {
489 return hba->caps & UFSHCD_CAP_HIBERN8_WITH_CLK_GATING;
490 }
ufshcd_is_clkscaling_enabled(struct ufs_hba * hba)491 static inline int ufshcd_is_clkscaling_enabled(struct ufs_hba *hba)
492 {
493 return hba->caps & UFSHCD_CAP_CLK_SCALING;
494 }
ufshcd_can_autobkops_during_suspend(struct ufs_hba * hba)495 static inline bool ufshcd_can_autobkops_during_suspend(struct ufs_hba *hba)
496 {
497 return hba->caps & UFSHCD_CAP_AUTO_BKOPS_SUSPEND;
498 }
499
500 #define ufshcd_writel(hba, val, reg) \
501 writel((val), (hba)->mmio_base + (reg))
502 #define ufshcd_readl(hba, reg) \
503 readl((hba)->mmio_base + (reg))
504
505 /**
506 * ufshcd_rmwl - read modify write into a register
507 * @hba - per adapter instance
508 * @mask - mask to apply on read value
509 * @val - actual value to write
510 * @reg - register address
511 */
ufshcd_rmwl(struct ufs_hba * hba,u32 mask,u32 val,u32 reg)512 static inline void ufshcd_rmwl(struct ufs_hba *hba, u32 mask, u32 val, u32 reg)
513 {
514 u32 tmp;
515
516 tmp = ufshcd_readl(hba, reg);
517 tmp &= ~mask;
518 tmp |= (val & mask);
519 ufshcd_writel(hba, tmp, reg);
520 }
521
522 int ufshcd_alloc_host(struct device *, struct ufs_hba **);
523 int ufshcd_init(struct ufs_hba * , void __iomem * , unsigned int);
524 void ufshcd_remove(struct ufs_hba *);
525
526 /**
527 * ufshcd_hba_stop - Send controller to reset state
528 * @hba: per adapter instance
529 */
ufshcd_hba_stop(struct ufs_hba * hba)530 static inline void ufshcd_hba_stop(struct ufs_hba *hba)
531 {
532 ufshcd_writel(hba, CONTROLLER_DISABLE, REG_CONTROLLER_ENABLE);
533 }
534
check_upiu_size(void)535 static inline void check_upiu_size(void)
536 {
537 BUILD_BUG_ON(ALIGNED_UPIU_SIZE <
538 GENERAL_UPIU_REQUEST_SIZE + QUERY_DESC_MAX_SIZE);
539 }
540
541 extern int ufshcd_runtime_suspend(struct ufs_hba *hba);
542 extern int ufshcd_runtime_resume(struct ufs_hba *hba);
543 extern int ufshcd_runtime_idle(struct ufs_hba *hba);
544 extern int ufshcd_system_suspend(struct ufs_hba *hba);
545 extern int ufshcd_system_resume(struct ufs_hba *hba);
546 extern int ufshcd_shutdown(struct ufs_hba *hba);
547 extern int ufshcd_dme_set_attr(struct ufs_hba *hba, u32 attr_sel,
548 u8 attr_set, u32 mib_val, u8 peer);
549 extern int ufshcd_dme_get_attr(struct ufs_hba *hba, u32 attr_sel,
550 u32 *mib_val, u8 peer);
551
552 /* UIC command interfaces for DME primitives */
553 #define DME_LOCAL 0
554 #define DME_PEER 1
555 #define ATTR_SET_NOR 0 /* NORMAL */
556 #define ATTR_SET_ST 1 /* STATIC */
557
ufshcd_dme_set(struct ufs_hba * hba,u32 attr_sel,u32 mib_val)558 static inline int ufshcd_dme_set(struct ufs_hba *hba, u32 attr_sel,
559 u32 mib_val)
560 {
561 return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
562 mib_val, DME_LOCAL);
563 }
564
ufshcd_dme_st_set(struct ufs_hba * hba,u32 attr_sel,u32 mib_val)565 static inline int ufshcd_dme_st_set(struct ufs_hba *hba, u32 attr_sel,
566 u32 mib_val)
567 {
568 return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
569 mib_val, DME_LOCAL);
570 }
571
ufshcd_dme_peer_set(struct ufs_hba * hba,u32 attr_sel,u32 mib_val)572 static inline int ufshcd_dme_peer_set(struct ufs_hba *hba, u32 attr_sel,
573 u32 mib_val)
574 {
575 return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
576 mib_val, DME_PEER);
577 }
578
ufshcd_dme_peer_st_set(struct ufs_hba * hba,u32 attr_sel,u32 mib_val)579 static inline int ufshcd_dme_peer_st_set(struct ufs_hba *hba, u32 attr_sel,
580 u32 mib_val)
581 {
582 return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
583 mib_val, DME_PEER);
584 }
585
ufshcd_dme_get(struct ufs_hba * hba,u32 attr_sel,u32 * mib_val)586 static inline int ufshcd_dme_get(struct ufs_hba *hba,
587 u32 attr_sel, u32 *mib_val)
588 {
589 return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_LOCAL);
590 }
591
ufshcd_dme_peer_get(struct ufs_hba * hba,u32 attr_sel,u32 * mib_val)592 static inline int ufshcd_dme_peer_get(struct ufs_hba *hba,
593 u32 attr_sel, u32 *mib_val)
594 {
595 return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_PEER);
596 }
597
598 int ufshcd_hold(struct ufs_hba *hba, bool async);
599 void ufshcd_release(struct ufs_hba *hba);
600 #endif /* End of Header */
601