2 * Universal Flash Storage Host controller driver
4 * This code is based on drivers/scsi/ufs/ufshcd.h
5 * Copyright (C) 2011-2013 Samsung India Software Operations
6 * Copyright (c) 2013-2016, The Linux Foundation. All rights reserved.
9 * Santosh Yaraganavi <santosh.sy@samsung.com>
10 * Vinayak Holikatti <h.vinayak@samsung.com>
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
16 * See the COPYING file in the top-level directory or visit
17 * <http://www.gnu.org/licenses/gpl-2.0.html>
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * This program is provided "AS IS" and "WITH ALL FAULTS" and
25 * without warranty of any kind. You are solely responsible for
26 * determining the appropriateness of using and distributing
27 * the program and assume all risks associated with your exercise
28 * of rights with respect to the program, including but not limited
29 * to infringement of third party rights, the risks and costs of
30 * program errors, damage to or loss of data, programs or equipment,
31 * and unavailability or interruption of operations. Under no
32 * circumstances will the contributor of this Program be liable for
33 * any damages of any kind arising from your use or distribution of
40 #include <linux/module.h>
41 #include <linux/kernel.h>
42 #include <linux/init.h>
43 #include <linux/interrupt.h>
45 #include <linux/delay.h>
46 #include <linux/slab.h>
47 #include <linux/spinlock.h>
48 #include <linux/rwsem.h>
49 #include <linux/workqueue.h>
50 #include <linux/errno.h>
51 #include <linux/types.h>
52 #include <linux/wait.h>
53 #include <linux/bitops.h>
54 #include <linux/pm_runtime.h>
55 #include <linux/clk.h>
56 #include <linux/completion.h>
57 #include <linux/regulator/consumer.h>
58 #include <linux/bitfield.h>
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>
73 #define UFSHCD "ufshcd"
74 #define UFSHCD_DRIVER_VERSION "0.2"
79 DEV_CMD_TYPE_NOP = 0x0,
80 DEV_CMD_TYPE_QUERY = 0x1,
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
100 struct completion done;
103 /* Used to differentiate the power management options */
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)
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 */
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)
133 * UFS Power management levels.
134 * Each level is in increasing order of power savings.
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 */
146 struct ufs_pm_lvl_states {
147 enum ufs_dev_pwr_mode dev_state;
148 enum uic_link_state link_state;
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
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;
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;
184 struct scsi_cmnd *cmd;
186 unsigned int sense_bufflen;
191 u8 lun; /* UPIU LUN id field is only 8-bit wide */
193 ktime_t issue_time_stamp;
194 ktime_t compl_time_stamp;
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
206 struct ufs_query_req request;
208 struct ufs_query_res response;
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
218 enum dev_cmd_type type;
220 struct completion *complete;
221 struct ufs_query query;
224 struct ufs_desc_size {
235 * struct ufs_clk_info - UFS clock related info
236 * @list: list headed by hba->clk_list_head
239 * @max_freq: maximum frequency supported by the clock
240 * @min_freq: min frequency that can be used for clock scaling
241 * @curr_freq: indicates the current frequency that it is set to
242 * @enabled: variable to check against multiple enable/disable
244 struct ufs_clk_info {
245 struct list_head list;
254 enum ufs_notify_change_status {
259 struct ufs_pa_layer_attr {
269 struct ufs_pwr_mode_info {
271 struct ufs_pa_layer_attr info;
275 * struct ufs_hba_variant_ops - variant specific callbacks
276 * @name: variant name
277 * @init: called when the driver is initialized
278 * @exit: called to cleanup everything done in init
279 * @get_ufs_hci_version: called to get UFS HCI version
280 * @clk_scale_notify: notifies that clks are scaled up/down
281 * @setup_clocks: called before touching any of the controller registers
282 * @setup_regulators: called before accessing the host controller
283 * @hce_enable_notify: called before and after HCE enable bit is set to allow
284 * variant specific Uni-Pro initialization.
285 * @link_startup_notify: called before and after Link startup is carried out
286 * to allow variant specific Uni-Pro initialization.
287 * @pwr_change_notify: called before and after a power mode change
288 * is carried out to allow vendor spesific capabilities
290 * @setup_xfer_req: called before any transfer request is issued
292 * @setup_task_mgmt: called before any task management request is issued
294 * @hibern8_notify: called around hibern8 enter/exit
295 * @apply_dev_quirks: called to apply device specific quirks
296 * @suspend: called during host controller PM callback
297 * @resume: called during host controller PM callback
298 * @dbg_register_dump: used to dump controller debug information
299 * @phy_initialization: used to initialize phys
300 * @device_reset: called to issue a reset pulse on the UFS device
302 struct ufs_hba_variant_ops {
304 int (*init)(struct ufs_hba *);
305 void (*exit)(struct ufs_hba *);
306 u32 (*get_ufs_hci_version)(struct ufs_hba *);
307 int (*clk_scale_notify)(struct ufs_hba *, bool,
308 enum ufs_notify_change_status);
309 int (*setup_clocks)(struct ufs_hba *, bool,
310 enum ufs_notify_change_status);
311 int (*setup_regulators)(struct ufs_hba *, bool);
312 int (*hce_enable_notify)(struct ufs_hba *,
313 enum ufs_notify_change_status);
314 int (*link_startup_notify)(struct ufs_hba *,
315 enum ufs_notify_change_status);
316 int (*pwr_change_notify)(struct ufs_hba *,
317 enum ufs_notify_change_status status,
318 struct ufs_pa_layer_attr *,
319 struct ufs_pa_layer_attr *);
320 void (*setup_xfer_req)(struct ufs_hba *, int, bool);
321 void (*setup_task_mgmt)(struct ufs_hba *, int, u8);
322 void (*hibern8_notify)(struct ufs_hba *, enum uic_cmd_dme,
323 enum ufs_notify_change_status);
324 int (*apply_dev_quirks)(struct ufs_hba *, struct ufs_dev_desc *);
325 int (*suspend)(struct ufs_hba *, enum ufs_pm_op);
326 int (*resume)(struct ufs_hba *, enum ufs_pm_op);
327 void (*dbg_register_dump)(struct ufs_hba *hba);
328 int (*phy_initialization)(struct ufs_hba *);
329 void (*device_reset)(struct ufs_hba *hba);
332 /* clock gating state */
333 enum clk_gating_state {
341 * struct ufs_clk_gating - UFS clock gating related info
342 * @gate_work: worker to turn off clocks after some delay as specified in
344 * @ungate_work: worker to turn on clocks that will be used in case of
346 * @state: the current clocks state
347 * @delay_ms: gating delay in ms
348 * @is_suspended: clk gating is suspended when set to 1 which can be used
349 * during suspend/resume
350 * @delay_attr: sysfs attribute to control delay_attr
351 * @enable_attr: sysfs attribute to enable/disable clock gating
352 * @is_enabled: Indicates the current status of clock gating
353 * @active_reqs: number of requests that are pending and should be waited for
354 * completion before gating clocks.
356 struct ufs_clk_gating {
357 struct delayed_work gate_work;
358 struct work_struct ungate_work;
359 enum clk_gating_state state;
360 unsigned long delay_ms;
362 struct device_attribute delay_attr;
363 struct device_attribute enable_attr;
366 struct workqueue_struct *clk_gating_workq;
369 struct ufs_saved_pwr_info {
370 struct ufs_pa_layer_attr info;
375 * struct ufs_clk_scaling - UFS clock scaling related data
376 * @active_reqs: number of requests that are pending. If this is zero when
377 * devfreq ->target() function is called then schedule "suspend_work" to
379 * @tot_busy_t: Total busy time in current polling window
380 * @window_start_t: Start time (in jiffies) of the current polling window
381 * @busy_start_t: Start time of current busy period
382 * @enable_attr: sysfs attribute to enable/disable clock scaling
383 * @saved_pwr_info: UFS power mode may also be changed during scaling and this
384 * one keeps track of previous power mode.
385 * @workq: workqueue to schedule devfreq suspend/resume work
386 * @suspend_work: worker to suspend devfreq
387 * @resume_work: worker to resume devfreq
388 * @is_allowed: tracks if scaling is currently allowed or not
389 * @is_busy_started: tracks if busy period has started or not
390 * @is_suspended: tracks if devfreq is suspended or not
392 struct ufs_clk_scaling {
394 unsigned long tot_busy_t;
395 unsigned long window_start_t;
396 ktime_t busy_start_t;
397 struct device_attribute enable_attr;
398 struct ufs_saved_pwr_info saved_pwr_info;
399 struct workqueue_struct *workq;
400 struct work_struct suspend_work;
401 struct work_struct resume_work;
403 bool is_busy_started;
408 * struct ufs_init_prefetch - contains data that is pre-fetched once during
410 * @icc_level: icc level which was read during initialization
412 struct ufs_init_prefetch {
416 #define UFS_ERR_REG_HIST_LENGTH 8
418 * struct ufs_err_reg_hist - keeps history of errors
419 * @pos: index to indicate cyclic buffer position
420 * @reg: cyclic buffer for registers value
421 * @tstamp: cyclic buffer for time stamp
423 struct ufs_err_reg_hist {
425 u32 reg[UFS_ERR_REG_HIST_LENGTH];
426 ktime_t tstamp[UFS_ERR_REG_HIST_LENGTH];
430 * struct ufs_stats - keeps usage/err statistics
431 * @hibern8_exit_cnt: Counter to keep track of number of exits,
432 * reset this after link-startup.
433 * @last_hibern8_exit_tstamp: Set time after the hibern8 exit.
434 * Clear after the first successful command completion.
435 * @pa_err: tracks pa-uic errors
436 * @dl_err: tracks dl-uic errors
437 * @nl_err: tracks nl-uic errors
438 * @tl_err: tracks tl-uic errors
439 * @dme_err: tracks dme errors
440 * @auto_hibern8_err: tracks auto-hibernate errors
441 * @fatal_err: tracks fatal errors
442 * @linkup_err: tracks link-startup errors
443 * @resume_err: tracks resume errors
444 * @suspend_err: tracks suspend errors
445 * @dev_reset: tracks device reset events
446 * @host_reset: tracks host reset events
447 * @tsk_abort: tracks task abort events
450 u32 hibern8_exit_cnt;
451 ktime_t last_hibern8_exit_tstamp;
453 /* uic specific errors */
454 struct ufs_err_reg_hist pa_err;
455 struct ufs_err_reg_hist dl_err;
456 struct ufs_err_reg_hist nl_err;
457 struct ufs_err_reg_hist tl_err;
458 struct ufs_err_reg_hist dme_err;
461 struct ufs_err_reg_hist auto_hibern8_err;
462 struct ufs_err_reg_hist fatal_err;
463 struct ufs_err_reg_hist link_startup_err;
464 struct ufs_err_reg_hist resume_err;
465 struct ufs_err_reg_hist suspend_err;
467 /* abnormal events */
468 struct ufs_err_reg_hist dev_reset;
469 struct ufs_err_reg_hist host_reset;
470 struct ufs_err_reg_hist task_abort;
474 * struct ufs_hba - per adapter private structure
475 * @mmio_base: UFSHCI base register address
476 * @ucdl_base_addr: UFS Command Descriptor base address
477 * @utrdl_base_addr: UTP Transfer Request Descriptor base address
478 * @utmrdl_base_addr: UTP Task Management Descriptor base address
479 * @ucdl_dma_addr: UFS Command Descriptor DMA address
480 * @utrdl_dma_addr: UTRDL DMA address
481 * @utmrdl_dma_addr: UTMRDL DMA address
482 * @host: Scsi_Host instance of the driver
483 * @dev: device handle
484 * @lrb: local reference block
485 * @cmd_queue: Used to allocate command tags from hba->host->tag_set.
486 * @outstanding_tasks: Bits representing outstanding task requests
487 * @outstanding_reqs: Bits representing outstanding transfer requests
488 * @capabilities: UFS Controller Capabilities
489 * @nutrs: Transfer Request Queue depth supported by controller
490 * @nutmrs: Task Management Queue depth supported by controller
491 * @ufs_version: UFS Version to which controller complies
492 * @vops: pointer to variant specific operations
493 * @priv: pointer to variant specific private data
494 * @irq: Irq number of the controller
495 * @active_uic_cmd: handle of active UIC command
496 * @uic_cmd_mutex: mutex for uic command
497 * @tmf_tag_set: TMF tag set.
498 * @tmf_queue: Used to allocate TMF tags.
499 * @pwr_done: completion for power mode change
500 * @ufshcd_state: UFSHCD states
501 * @eh_flags: Error handling flags
502 * @intr_mask: Interrupt Mask Bits
503 * @ee_ctrl_mask: Exception event control mask
504 * @is_powered: flag to check if HBA is powered
505 * @is_init_prefetch: flag to check if data was pre-fetched in initialization
506 * @init_prefetch_data: data pre-fetched during initialization
507 * @eh_work: Worker to handle UFS errors that require s/w attention
508 * @eeh_work: Worker to handle exception events
509 * @errors: HBA errors
510 * @uic_error: UFS interconnect layer error status
511 * @saved_err: sticky error mask
512 * @saved_uic_err: sticky UIC error mask
513 * @silence_err_logs: flag to silence error logs
514 * @dev_cmd: ufs device management command information
515 * @last_dme_cmd_tstamp: time stamp of the last completed DME command
516 * @auto_bkops_enabled: to track whether bkops is enabled in device
517 * @vreg_info: UFS device voltage regulator information
518 * @clk_list_head: UFS host controller clocks list node head
519 * @pwr_info: holds current power mode
520 * @max_pwr_info: keeps the device max valid pwm
521 * @desc_size: descriptor sizes reported by device
522 * @urgent_bkops_lvl: keeps track of urgent bkops level for device
523 * @is_urgent_bkops_lvl_checked: keeps track if the urgent bkops level for
524 * device is known or not.
525 * @scsi_block_reqs_cnt: reference counting for scsi block requests
528 void __iomem *mmio_base;
530 /* Virtual memory reference */
531 struct utp_transfer_cmd_desc *ucdl_base_addr;
532 struct utp_transfer_req_desc *utrdl_base_addr;
533 struct utp_task_req_desc *utmrdl_base_addr;
535 /* DMA memory reference */
536 dma_addr_t ucdl_dma_addr;
537 dma_addr_t utrdl_dma_addr;
538 dma_addr_t utmrdl_dma_addr;
540 struct Scsi_Host *host;
542 struct request_queue *cmd_queue;
544 * This field is to keep a reference to "scsi_device" corresponding to
547 struct scsi_device *sdev_ufs_device;
549 enum ufs_dev_pwr_mode curr_dev_pwr_mode;
550 enum uic_link_state uic_link_state;
551 /* Desired UFS power management level during runtime PM */
552 enum ufs_pm_level rpm_lvl;
553 /* Desired UFS power management level during system PM */
554 enum ufs_pm_level spm_lvl;
555 struct device_attribute rpm_lvl_attr;
556 struct device_attribute spm_lvl_attr;
557 int pm_op_in_progress;
559 /* Auto-Hibernate Idle Timer register value */
562 struct ufshcd_lrb *lrb;
564 unsigned long outstanding_tasks;
565 unsigned long outstanding_reqs;
571 const struct ufs_hba_variant_ops *vops;
575 enum ufs_ref_clk_freq dev_ref_clk_freq;
577 /* Interrupt aggregation support is broken */
578 #define UFSHCD_QUIRK_BROKEN_INTR_AGGR 0x1
581 * delay before each dme command is required as the unipro
582 * layer has shown instabilities
584 #define UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS 0x2
587 * If UFS host controller is having issue in processing LCC (Line
588 * Control Command) coming from device then enable this quirk.
589 * When this quirk is enabled, host controller driver should disable
590 * the LCC transmission on UFS device (by clearing TX_LCC_ENABLE
591 * attribute of device to 0).
593 #define UFSHCD_QUIRK_BROKEN_LCC 0x4
596 * The attribute PA_RXHSUNTERMCAP specifies whether or not the
597 * inbound Link supports unterminated line in HS mode. Setting this
598 * attribute to 1 fixes moving to HS gear.
600 #define UFSHCD_QUIRK_BROKEN_PA_RXHSUNTERMCAP 0x8
603 * This quirk needs to be enabled if the host contoller only allows
604 * accessing the peer dme attributes in AUTO mode (FAST AUTO or
607 #define UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE 0x10
610 * This quirk needs to be enabled if the host contoller doesn't
611 * advertise the correct version in UFS_VER register. If this quirk
612 * is enabled, standard UFS host driver will call the vendor specific
613 * ops (get_ufs_hci_version) to get the correct version.
615 #define UFSHCD_QUIRK_BROKEN_UFS_HCI_VERSION 0x20
618 * This quirk needs to be enabled if the host contoller regards
619 * resolution of the values of PRDTO and PRDTL in UTRD as byte.
621 #define UFSHCD_QUIRK_PRDT_BYTE_GRAN 0x80
624 * Clear handling for transfer/task request list is just opposite.
626 #define UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR 0x100
629 * This quirk needs to be enabled if host controller doesn't allow
630 * that the interrupt aggregation timer and counter are reset by s/w.
632 #define UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR 0x200
635 * This quirks needs to be enabled if host controller cannot be
636 * enabled via HCE register.
638 #define UFSHCI_QUIRK_BROKEN_HCE 0x400
639 unsigned int quirks; /* Deviations from standard UFSHCI spec. */
641 /* Device deviations from standard UFS device spec. */
642 unsigned int dev_quirks;
644 struct blk_mq_tag_set tmf_tag_set;
645 struct request_queue *tmf_queue;
647 struct uic_command *active_uic_cmd;
648 struct mutex uic_cmd_mutex;
649 struct completion *uic_async_done;
656 bool is_init_prefetch;
657 struct ufs_init_prefetch init_prefetch_data;
660 struct work_struct eh_work;
661 struct work_struct eeh_work;
668 struct ufs_stats ufs_stats;
669 bool silence_err_logs;
671 /* Device management request data */
672 struct ufs_dev_cmd dev_cmd;
673 ktime_t last_dme_cmd_tstamp;
675 /* Keeps information of the UFS device connected to this host */
676 struct ufs_dev_info dev_info;
677 bool auto_bkops_enabled;
678 struct ufs_vreg_info vreg_info;
679 struct list_head clk_list_head;
681 bool wlun_dev_clr_ua;
683 /* Number of requests aborts */
686 /* Number of lanes available (1 or 2) for Rx/Tx */
687 u32 lanes_per_direction;
688 struct ufs_pa_layer_attr pwr_info;
689 struct ufs_pwr_mode_info max_pwr_info;
691 struct ufs_clk_gating clk_gating;
692 /* Control to enable/disable host capabilities */
694 /* Allow dynamic clk gating */
695 #define UFSHCD_CAP_CLK_GATING (1 << 0)
696 /* Allow hiberb8 with clk gating */
697 #define UFSHCD_CAP_HIBERN8_WITH_CLK_GATING (1 << 1)
698 /* Allow dynamic clk scaling */
699 #define UFSHCD_CAP_CLK_SCALING (1 << 2)
700 /* Allow auto bkops to enabled during runtime suspend */
701 #define UFSHCD_CAP_AUTO_BKOPS_SUSPEND (1 << 3)
703 * This capability allows host controller driver to use the UFS HCI's
704 * interrupt aggregation capability.
705 * CAUTION: Enabling this might reduce overall UFS throughput.
707 #define UFSHCD_CAP_INTR_AGGR (1 << 4)
709 * This capability allows the device auto-bkops to be always enabled
710 * except during suspend (both runtime and suspend).
711 * Enabling this capability means that device will always be allowed
712 * to do background operation when it's active but it might degrade
713 * the performance of ongoing read/write operations.
715 #define UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND (1 << 5)
717 struct devfreq *devfreq;
718 struct ufs_clk_scaling clk_scaling;
719 bool is_sys_suspended;
721 enum bkops_status urgent_bkops_lvl;
722 bool is_urgent_bkops_lvl_checked;
724 struct rw_semaphore clk_scaling_lock;
725 struct ufs_desc_size desc_size;
726 atomic_t scsi_block_reqs_cnt;
728 struct device bsg_dev;
729 struct request_queue *bsg_queue;
732 /* Returns true if clocks can be gated. Otherwise false */
733 static inline bool ufshcd_is_clkgating_allowed(struct ufs_hba *hba)
735 return hba->caps & UFSHCD_CAP_CLK_GATING;
737 static inline bool ufshcd_can_hibern8_during_gating(struct ufs_hba *hba)
739 return hba->caps & UFSHCD_CAP_HIBERN8_WITH_CLK_GATING;
741 static inline int ufshcd_is_clkscaling_supported(struct ufs_hba *hba)
743 return hba->caps & UFSHCD_CAP_CLK_SCALING;
745 static inline bool ufshcd_can_autobkops_during_suspend(struct ufs_hba *hba)
747 return hba->caps & UFSHCD_CAP_AUTO_BKOPS_SUSPEND;
750 static inline bool ufshcd_is_intr_aggr_allowed(struct ufs_hba *hba)
752 /* DWC UFS Core has the Interrupt aggregation feature but is not detectable*/
753 #ifndef CONFIG_SCSI_UFS_DWC
754 if ((hba->caps & UFSHCD_CAP_INTR_AGGR) &&
755 !(hba->quirks & UFSHCD_QUIRK_BROKEN_INTR_AGGR))
764 static inline bool ufshcd_is_auto_hibern8_supported(struct ufs_hba *hba)
766 return (hba->capabilities & MASK_AUTO_HIBERN8_SUPPORT);
769 static inline bool ufshcd_is_auto_hibern8_enabled(struct ufs_hba *hba)
771 return FIELD_GET(UFSHCI_AHIBERN8_TIMER_MASK, hba->ahit) ? true : false;
774 #define ufshcd_writel(hba, val, reg) \
775 writel((val), (hba)->mmio_base + (reg))
776 #define ufshcd_readl(hba, reg) \
777 readl((hba)->mmio_base + (reg))
780 * ufshcd_rmwl - read modify write into a register
781 * @hba - per adapter instance
782 * @mask - mask to apply on read value
783 * @val - actual value to write
784 * @reg - register address
786 static inline void ufshcd_rmwl(struct ufs_hba *hba, u32 mask, u32 val, u32 reg)
790 tmp = ufshcd_readl(hba, reg);
793 ufshcd_writel(hba, tmp, reg);
796 int ufshcd_alloc_host(struct device *, struct ufs_hba **);
797 void ufshcd_dealloc_host(struct ufs_hba *);
798 int ufshcd_init(struct ufs_hba * , void __iomem * , unsigned int);
799 void ufshcd_remove(struct ufs_hba *);
800 int ufshcd_wait_for_register(struct ufs_hba *hba, u32 reg, u32 mask,
801 u32 val, unsigned long interval_us,
802 unsigned long timeout_ms, bool can_sleep);
803 void ufshcd_parse_dev_ref_clk_freq(struct ufs_hba *hba, struct clk *refclk);
805 static inline void check_upiu_size(void)
807 BUILD_BUG_ON(ALIGNED_UPIU_SIZE <
808 GENERAL_UPIU_REQUEST_SIZE + QUERY_DESC_MAX_SIZE);
812 * ufshcd_set_variant - set variant specific data to the hba
813 * @hba - per adapter instance
814 * @variant - pointer to variant specific data
816 static inline void ufshcd_set_variant(struct ufs_hba *hba, void *variant)
823 * ufshcd_get_variant - get variant specific data from the hba
824 * @hba - per adapter instance
826 static inline void *ufshcd_get_variant(struct ufs_hba *hba)
831 static inline bool ufshcd_keep_autobkops_enabled_except_suspend(
834 return hba->caps & UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND;
837 extern int ufshcd_runtime_suspend(struct ufs_hba *hba);
838 extern int ufshcd_runtime_resume(struct ufs_hba *hba);
839 extern int ufshcd_runtime_idle(struct ufs_hba *hba);
840 extern int ufshcd_system_suspend(struct ufs_hba *hba);
841 extern int ufshcd_system_resume(struct ufs_hba *hba);
842 extern int ufshcd_shutdown(struct ufs_hba *hba);
843 extern int ufshcd_dme_set_attr(struct ufs_hba *hba, u32 attr_sel,
844 u8 attr_set, u32 mib_val, u8 peer);
845 extern int ufshcd_dme_get_attr(struct ufs_hba *hba, u32 attr_sel,
846 u32 *mib_val, u8 peer);
847 extern int ufshcd_config_pwr_mode(struct ufs_hba *hba,
848 struct ufs_pa_layer_attr *desired_pwr_mode);
850 /* UIC command interfaces for DME primitives */
853 #define ATTR_SET_NOR 0 /* NORMAL */
854 #define ATTR_SET_ST 1 /* STATIC */
856 static inline int ufshcd_dme_set(struct ufs_hba *hba, u32 attr_sel,
859 return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
863 static inline int ufshcd_dme_st_set(struct ufs_hba *hba, u32 attr_sel,
866 return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
870 static inline int ufshcd_dme_peer_set(struct ufs_hba *hba, u32 attr_sel,
873 return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
877 static inline int ufshcd_dme_peer_st_set(struct ufs_hba *hba, u32 attr_sel,
880 return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
884 static inline int ufshcd_dme_get(struct ufs_hba *hba,
885 u32 attr_sel, u32 *mib_val)
887 return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_LOCAL);
890 static inline int ufshcd_dme_peer_get(struct ufs_hba *hba,
891 u32 attr_sel, u32 *mib_val)
893 return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_PEER);
896 static inline bool ufshcd_is_hs_mode(struct ufs_pa_layer_attr *pwr_info)
898 return (pwr_info->pwr_rx == FAST_MODE ||
899 pwr_info->pwr_rx == FASTAUTO_MODE) &&
900 (pwr_info->pwr_tx == FAST_MODE ||
901 pwr_info->pwr_tx == FASTAUTO_MODE);
904 /* Expose Query-Request API */
905 int ufshcd_query_descriptor_retry(struct ufs_hba *hba,
906 enum query_opcode opcode,
907 enum desc_idn idn, u8 index,
909 u8 *desc_buf, int *buf_len);
910 int ufshcd_read_desc_param(struct ufs_hba *hba,
911 enum desc_idn desc_id,
916 int ufshcd_query_attr(struct ufs_hba *hba, enum query_opcode opcode,
917 enum attr_idn idn, u8 index, u8 selector, u32 *attr_val);
918 int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
919 enum flag_idn idn, bool *flag_res);
921 void ufshcd_auto_hibern8_enable(struct ufs_hba *hba);
923 #define SD_ASCII_STD true
925 int ufshcd_read_string_desc(struct ufs_hba *hba, u8 desc_index,
926 u8 **buf, bool ascii);
928 int ufshcd_hold(struct ufs_hba *hba, bool async);
929 void ufshcd_release(struct ufs_hba *hba);
931 int ufshcd_map_desc_id_to_length(struct ufs_hba *hba, enum desc_idn desc_id,
934 u32 ufshcd_get_local_unipro_ver(struct ufs_hba *hba);
936 int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd);
938 int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba,
939 struct utp_upiu_req *req_upiu,
940 struct utp_upiu_req *rsp_upiu,
942 u8 *desc_buff, int *buff_len,
943 enum query_opcode desc_op);
945 /* Wrapper functions for safely calling variant operations */
946 static inline const char *ufshcd_get_var_name(struct ufs_hba *hba)
949 return hba->vops->name;
953 static inline int ufshcd_vops_init(struct ufs_hba *hba)
955 if (hba->vops && hba->vops->init)
956 return hba->vops->init(hba);
961 static inline void ufshcd_vops_exit(struct ufs_hba *hba)
963 if (hba->vops && hba->vops->exit)
964 return hba->vops->exit(hba);
967 static inline u32 ufshcd_vops_get_ufs_hci_version(struct ufs_hba *hba)
969 if (hba->vops && hba->vops->get_ufs_hci_version)
970 return hba->vops->get_ufs_hci_version(hba);
972 return ufshcd_readl(hba, REG_UFS_VERSION);
975 static inline int ufshcd_vops_clk_scale_notify(struct ufs_hba *hba,
976 bool up, enum ufs_notify_change_status status)
978 if (hba->vops && hba->vops->clk_scale_notify)
979 return hba->vops->clk_scale_notify(hba, up, status);
983 static inline int ufshcd_vops_setup_clocks(struct ufs_hba *hba, bool on,
984 enum ufs_notify_change_status status)
986 if (hba->vops && hba->vops->setup_clocks)
987 return hba->vops->setup_clocks(hba, on, status);
991 static inline int ufshcd_vops_setup_regulators(struct ufs_hba *hba, bool status)
993 if (hba->vops && hba->vops->setup_regulators)
994 return hba->vops->setup_regulators(hba, status);
999 static inline int ufshcd_vops_hce_enable_notify(struct ufs_hba *hba,
1002 if (hba->vops && hba->vops->hce_enable_notify)
1003 return hba->vops->hce_enable_notify(hba, status);
1007 static inline int ufshcd_vops_link_startup_notify(struct ufs_hba *hba,
1010 if (hba->vops && hba->vops->link_startup_notify)
1011 return hba->vops->link_startup_notify(hba, status);
1016 static inline int ufshcd_vops_pwr_change_notify(struct ufs_hba *hba,
1018 struct ufs_pa_layer_attr *dev_max_params,
1019 struct ufs_pa_layer_attr *dev_req_params)
1021 if (hba->vops && hba->vops->pwr_change_notify)
1022 return hba->vops->pwr_change_notify(hba, status,
1023 dev_max_params, dev_req_params);
1028 static inline void ufshcd_vops_setup_xfer_req(struct ufs_hba *hba, int tag,
1031 if (hba->vops && hba->vops->setup_xfer_req)
1032 return hba->vops->setup_xfer_req(hba, tag, is_scsi_cmd);
1035 static inline void ufshcd_vops_setup_task_mgmt(struct ufs_hba *hba,
1036 int tag, u8 tm_function)
1038 if (hba->vops && hba->vops->setup_task_mgmt)
1039 return hba->vops->setup_task_mgmt(hba, tag, tm_function);
1042 static inline void ufshcd_vops_hibern8_notify(struct ufs_hba *hba,
1043 enum uic_cmd_dme cmd,
1044 enum ufs_notify_change_status status)
1046 if (hba->vops && hba->vops->hibern8_notify)
1047 return hba->vops->hibern8_notify(hba, cmd, status);
1050 static inline int ufshcd_vops_apply_dev_quirks(struct ufs_hba *hba,
1051 struct ufs_dev_desc *card)
1053 if (hba->vops && hba->vops->apply_dev_quirks)
1054 return hba->vops->apply_dev_quirks(hba, card);
1058 static inline int ufshcd_vops_suspend(struct ufs_hba *hba, enum ufs_pm_op op)
1060 if (hba->vops && hba->vops->suspend)
1061 return hba->vops->suspend(hba, op);
1066 static inline int ufshcd_vops_resume(struct ufs_hba *hba, enum ufs_pm_op op)
1068 if (hba->vops && hba->vops->resume)
1069 return hba->vops->resume(hba, op);
1074 static inline void ufshcd_vops_dbg_register_dump(struct ufs_hba *hba)
1076 if (hba->vops && hba->vops->dbg_register_dump)
1077 hba->vops->dbg_register_dump(hba);
1080 static inline void ufshcd_vops_device_reset(struct ufs_hba *hba)
1082 if (hba->vops && hba->vops->device_reset)
1083 hba->vops->device_reset(hba);
1086 extern struct ufs_pm_lvl_states ufs_pm_lvl_states[];
1089 * ufshcd_scsi_to_upiu_lun - maps scsi LUN to UPIU LUN
1090 * @scsi_lun: scsi LUN id
1092 * Returns UPIU LUN id
1094 static inline u8 ufshcd_scsi_to_upiu_lun(unsigned int scsi_lun)
1096 if (scsi_is_wlun(scsi_lun))
1097 return (scsi_lun & UFS_UPIU_MAX_UNIT_NUM_ID)
1100 return scsi_lun & UFS_UPIU_MAX_UNIT_NUM_ID;
1103 int ufshcd_dump_regs(struct ufs_hba *hba, size_t offset, size_t len,
1104 const char *prefix);
1106 #endif /* End of Header */