1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Universal Flash Storage Host controller driver
4 * Copyright (C) 2011-2013 Samsung India Software Operations
5 * Copyright (c) 2013-2016, The Linux Foundation. All rights reserved.
8 * Santosh Yaraganavi <santosh.sy@samsung.com>
9 * Vinayak Holikatti <h.vinayak@samsung.com>
15 #include <linux/bitfield.h>
16 #include <linux/blk-crypto-profile.h>
17 #include <linux/blk-mq.h>
18 #include <linux/devfreq.h>
19 #include <linux/pm_runtime.h>
20 #include <scsi/scsi_device.h>
21 #include <ufs/unipro.h>
23 #include <ufs/ufs_quirks.h>
24 #include <ufs/ufshci.h>
26 #define UFSHCD "ufshcd"
31 DEV_CMD_TYPE_NOP = 0x0,
32 DEV_CMD_TYPE_QUERY = 0x1,
36 /* uic specific errors */
44 UFS_EVT_AUTO_HIBERN8_ERR,
46 UFS_EVT_LINK_STARTUP_FAIL,
61 * struct uic_command - UIC command structure
62 * @command: UIC command
63 * @argument1: UIC command argument 1
64 * @argument2: UIC command argument 2
65 * @argument3: UIC command argument 3
66 * @cmd_active: Indicate if UIC command is outstanding
67 * @done: UIC command completion
75 struct completion done;
78 /* Used to differentiate the power management options */
85 /* Host <-> Device UniPro Link state */
87 UIC_LINK_OFF_STATE = 0, /* Link powered down or disabled */
88 UIC_LINK_ACTIVE_STATE = 1, /* Link is in Fast/Slow/Sleep state */
89 UIC_LINK_HIBERN8_STATE = 2, /* Link is in Hibernate state */
90 UIC_LINK_BROKEN_STATE = 3, /* Link is in broken state */
93 #define ufshcd_is_link_off(hba) ((hba)->uic_link_state == UIC_LINK_OFF_STATE)
94 #define ufshcd_is_link_active(hba) ((hba)->uic_link_state == \
95 UIC_LINK_ACTIVE_STATE)
96 #define ufshcd_is_link_hibern8(hba) ((hba)->uic_link_state == \
97 UIC_LINK_HIBERN8_STATE)
98 #define ufshcd_is_link_broken(hba) ((hba)->uic_link_state == \
99 UIC_LINK_BROKEN_STATE)
100 #define ufshcd_set_link_off(hba) ((hba)->uic_link_state = UIC_LINK_OFF_STATE)
101 #define ufshcd_set_link_active(hba) ((hba)->uic_link_state = \
102 UIC_LINK_ACTIVE_STATE)
103 #define ufshcd_set_link_hibern8(hba) ((hba)->uic_link_state = \
104 UIC_LINK_HIBERN8_STATE)
105 #define ufshcd_set_link_broken(hba) ((hba)->uic_link_state = \
106 UIC_LINK_BROKEN_STATE)
108 #define ufshcd_set_ufs_dev_active(h) \
109 ((h)->curr_dev_pwr_mode = UFS_ACTIVE_PWR_MODE)
110 #define ufshcd_set_ufs_dev_sleep(h) \
111 ((h)->curr_dev_pwr_mode = UFS_SLEEP_PWR_MODE)
112 #define ufshcd_set_ufs_dev_poweroff(h) \
113 ((h)->curr_dev_pwr_mode = UFS_POWERDOWN_PWR_MODE)
114 #define ufshcd_set_ufs_dev_deepsleep(h) \
115 ((h)->curr_dev_pwr_mode = UFS_DEEPSLEEP_PWR_MODE)
116 #define ufshcd_is_ufs_dev_active(h) \
117 ((h)->curr_dev_pwr_mode == UFS_ACTIVE_PWR_MODE)
118 #define ufshcd_is_ufs_dev_sleep(h) \
119 ((h)->curr_dev_pwr_mode == UFS_SLEEP_PWR_MODE)
120 #define ufshcd_is_ufs_dev_poweroff(h) \
121 ((h)->curr_dev_pwr_mode == UFS_POWERDOWN_PWR_MODE)
122 #define ufshcd_is_ufs_dev_deepsleep(h) \
123 ((h)->curr_dev_pwr_mode == UFS_DEEPSLEEP_PWR_MODE)
126 * UFS Power management levels.
127 * Each level is in increasing order of power savings, except DeepSleep
128 * which is lower than PowerDown with power on but not PowerDown with
142 struct ufs_pm_lvl_states {
143 enum ufs_dev_pwr_mode dev_state;
144 enum uic_link_state link_state;
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 * @utrd_dma_addr: UTRD dma address for debug
154 * @ucd_prdt_dma_addr: PRDT dma address for debug
155 * @ucd_rsp_dma_addr: UPIU response dma address for debug
156 * @ucd_req_dma_addr: UPIU request dma address for debug
157 * @cmd: pointer to SCSI command
158 * @scsi_status: SCSI status of the command
159 * @command_type: SCSI, UFS, Query.
160 * @task_tag: Task tag of the command
161 * @lun: LUN of the command
162 * @intr_cmd: Interrupt command (doesn't participate in interrupt aggregation)
163 * @issue_time_stamp: time stamp for debug purposes
164 * @compl_time_stamp: time stamp for statistics
165 * @crypto_key_slot: the key slot to use for inline crypto (-1 if none)
166 * @data_unit_num: the data unit number for the first block for inline crypto
167 * @req_abort_skip: skip request abort task flag
170 struct utp_transfer_req_desc *utr_descriptor_ptr;
171 struct utp_upiu_req *ucd_req_ptr;
172 struct utp_upiu_rsp *ucd_rsp_ptr;
173 struct ufshcd_sg_entry *ucd_prdt_ptr;
175 dma_addr_t utrd_dma_addr;
176 dma_addr_t ucd_req_dma_addr;
177 dma_addr_t ucd_rsp_dma_addr;
178 dma_addr_t ucd_prdt_dma_addr;
180 struct scsi_cmnd *cmd;
185 u8 lun; /* UPIU LUN id field is only 8-bit wide */
187 ktime_t issue_time_stamp;
188 ktime_t compl_time_stamp;
189 #ifdef CONFIG_SCSI_UFS_CRYPTO
198 * struct ufs_query - holds relevant data structures for query request
199 * @request: request upiu and function
200 * @descriptor: buffer for sending/receiving descriptor
201 * @response: response upiu and response
204 struct ufs_query_req request;
206 struct ufs_query_res response;
210 * struct ufs_dev_cmd - all assosiated fields with device management commands
211 * @type: device management command type - Query, NOP OUT
212 * @lock: lock to allow one command at a time
213 * @complete: internal commands completion
214 * @query: Device management query information
217 enum dev_cmd_type type;
219 struct completion *complete;
220 struct ufs_query query;
224 * struct ufs_clk_info - UFS clock related info
225 * @list: list headed by hba->clk_list_head
228 * @max_freq: maximum frequency supported by the clock
229 * @min_freq: min frequency that can be used for clock scaling
230 * @curr_freq: indicates the current frequency that it is set to
231 * @keep_link_active: indicates that the clk should not be disabled if
233 * @enabled: variable to check against multiple enable/disable
235 struct ufs_clk_info {
236 struct list_head list;
242 bool keep_link_active;
246 enum ufs_notify_change_status {
251 struct ufs_pa_layer_attr {
261 struct ufs_pwr_mode_info {
263 struct ufs_pa_layer_attr info;
267 * struct ufs_hba_variant_ops - variant specific callbacks
268 * @name: variant name
269 * @init: called when the driver is initialized
270 * @exit: called to cleanup everything done in init
271 * @get_ufs_hci_version: called to get UFS HCI version
272 * @clk_scale_notify: notifies that clks are scaled up/down
273 * @setup_clocks: called before touching any of the controller registers
274 * @hce_enable_notify: called before and after HCE enable bit is set to allow
275 * variant specific Uni-Pro initialization.
276 * @link_startup_notify: called before and after Link startup is carried out
277 * to allow variant specific Uni-Pro initialization.
278 * @pwr_change_notify: called before and after a power mode change
279 * is carried out to allow vendor spesific capabilities
281 * @setup_xfer_req: called before any transfer request is issued
283 * @setup_task_mgmt: called before any task management request is issued
285 * @hibern8_notify: called around hibern8 enter/exit
286 * @apply_dev_quirks: called to apply device specific quirks
287 * @fixup_dev_quirks: called to modify device specific quirks
288 * @suspend: called during host controller PM callback
289 * @resume: called during host controller PM callback
290 * @dbg_register_dump: used to dump controller debug information
291 * @phy_initialization: used to initialize phys
292 * @device_reset: called to issue a reset pulse on the UFS device
293 * @config_scaling_param: called to configure clock scaling parameters
294 * @program_key: program or evict an inline encryption key
295 * @event_notify: called to notify important events
297 struct ufs_hba_variant_ops {
299 int (*init)(struct ufs_hba *);
300 void (*exit)(struct ufs_hba *);
301 u32 (*get_ufs_hci_version)(struct ufs_hba *);
302 int (*clk_scale_notify)(struct ufs_hba *, bool,
303 enum ufs_notify_change_status);
304 int (*setup_clocks)(struct ufs_hba *, bool,
305 enum ufs_notify_change_status);
306 int (*hce_enable_notify)(struct ufs_hba *,
307 enum ufs_notify_change_status);
308 int (*link_startup_notify)(struct ufs_hba *,
309 enum ufs_notify_change_status);
310 int (*pwr_change_notify)(struct ufs_hba *,
311 enum ufs_notify_change_status status,
312 struct ufs_pa_layer_attr *,
313 struct ufs_pa_layer_attr *);
314 void (*setup_xfer_req)(struct ufs_hba *hba, int tag,
316 void (*setup_task_mgmt)(struct ufs_hba *, int, u8);
317 void (*hibern8_notify)(struct ufs_hba *, enum uic_cmd_dme,
318 enum ufs_notify_change_status);
319 int (*apply_dev_quirks)(struct ufs_hba *hba);
320 void (*fixup_dev_quirks)(struct ufs_hba *hba);
321 int (*suspend)(struct ufs_hba *, enum ufs_pm_op,
322 enum ufs_notify_change_status);
323 int (*resume)(struct ufs_hba *, enum ufs_pm_op);
324 void (*dbg_register_dump)(struct ufs_hba *hba);
325 int (*phy_initialization)(struct ufs_hba *);
326 int (*device_reset)(struct ufs_hba *hba);
327 void (*config_scaling_param)(struct ufs_hba *hba,
328 struct devfreq_dev_profile *profile,
329 struct devfreq_simple_ondemand_data *data);
330 int (*program_key)(struct ufs_hba *hba,
331 const union ufs_crypto_cfg_entry *cfg, int slot);
332 void (*event_notify)(struct ufs_hba *hba,
333 enum ufs_event_type evt, void *data);
336 /* clock gating state */
337 enum clk_gating_state {
345 * struct ufs_clk_gating - UFS clock gating related info
346 * @gate_work: worker to turn off clocks after some delay as specified in
348 * @ungate_work: worker to turn on clocks that will be used in case of
350 * @state: the current clocks state
351 * @delay_ms: gating delay in ms
352 * @is_suspended: clk gating is suspended when set to 1 which can be used
353 * during suspend/resume
354 * @delay_attr: sysfs attribute to control delay_attr
355 * @enable_attr: sysfs attribute to enable/disable clock gating
356 * @is_enabled: Indicates the current status of clock gating
357 * @is_initialized: Indicates whether clock gating is initialized or not
358 * @active_reqs: number of requests that are pending and should be waited for
359 * completion before gating clocks.
360 * @clk_gating_workq: workqueue for clock gating work.
362 struct ufs_clk_gating {
363 struct delayed_work gate_work;
364 struct work_struct ungate_work;
365 enum clk_gating_state state;
366 unsigned long delay_ms;
368 struct device_attribute delay_attr;
369 struct device_attribute enable_attr;
373 struct workqueue_struct *clk_gating_workq;
376 struct ufs_saved_pwr_info {
377 struct ufs_pa_layer_attr info;
382 * struct ufs_clk_scaling - UFS clock scaling related data
383 * @active_reqs: number of requests that are pending. If this is zero when
384 * devfreq ->target() function is called then schedule "suspend_work" to
386 * @tot_busy_t: Total busy time in current polling window
387 * @window_start_t: Start time (in jiffies) of the current polling window
388 * @busy_start_t: Start time of current busy period
389 * @enable_attr: sysfs attribute to enable/disable clock scaling
390 * @saved_pwr_info: UFS power mode may also be changed during scaling and this
391 * one keeps track of previous power mode.
392 * @workq: workqueue to schedule devfreq suspend/resume work
393 * @suspend_work: worker to suspend devfreq
394 * @resume_work: worker to resume devfreq
395 * @min_gear: lowest HS gear to scale down to
396 * @is_enabled: tracks if scaling is currently enabled or not, controlled by
397 * clkscale_enable sysfs node
398 * @is_allowed: tracks if scaling is currently allowed or not, used to block
399 * clock scaling which is not invoked from devfreq governor
400 * @is_initialized: Indicates whether clock scaling is initialized or not
401 * @is_busy_started: tracks if busy period has started or not
402 * @is_suspended: tracks if devfreq is suspended or not
404 struct ufs_clk_scaling {
406 unsigned long tot_busy_t;
407 ktime_t window_start_t;
408 ktime_t busy_start_t;
409 struct device_attribute enable_attr;
410 struct ufs_saved_pwr_info saved_pwr_info;
411 struct workqueue_struct *workq;
412 struct work_struct suspend_work;
413 struct work_struct resume_work;
418 bool is_busy_started;
422 #define UFS_EVENT_HIST_LENGTH 8
424 * struct ufs_event_hist - keeps history of errors
425 * @pos: index to indicate cyclic buffer position
426 * @val: cyclic buffer for registers value
427 * @tstamp: cyclic buffer for time stamp
428 * @cnt: error counter
430 struct ufs_event_hist {
432 u32 val[UFS_EVENT_HIST_LENGTH];
433 ktime_t tstamp[UFS_EVENT_HIST_LENGTH];
434 unsigned long long cnt;
438 * struct ufs_stats - keeps usage/err statistics
439 * @last_intr_status: record the last interrupt status.
440 * @last_intr_ts: record the last interrupt timestamp.
441 * @hibern8_exit_cnt: Counter to keep track of number of exits,
442 * reset this after link-startup.
443 * @last_hibern8_exit_tstamp: Set time after the hibern8 exit.
444 * Clear after the first successful command completion.
445 * @event: array with event history.
448 u32 last_intr_status;
449 ktime_t last_intr_ts;
451 u32 hibern8_exit_cnt;
452 ktime_t last_hibern8_exit_tstamp;
453 struct ufs_event_hist event[UFS_EVT_CNT];
457 * enum ufshcd_state - UFS host controller state
458 * @UFSHCD_STATE_RESET: Link is not operational. Postpone SCSI command
460 * @UFSHCD_STATE_OPERATIONAL: The host controller is operational and can process
462 * @UFSHCD_STATE_EH_SCHEDULED_NON_FATAL: The error handler has been scheduled.
463 * SCSI commands may be submitted to the controller.
464 * @UFSHCD_STATE_EH_SCHEDULED_FATAL: The error handler has been scheduled. Fail
465 * newly submitted SCSI commands with error code DID_BAD_TARGET.
466 * @UFSHCD_STATE_ERROR: An unrecoverable error occurred, e.g. link recovery
467 * failed. Fail all SCSI commands with error code DID_ERROR.
471 UFSHCD_STATE_OPERATIONAL,
472 UFSHCD_STATE_EH_SCHEDULED_NON_FATAL,
473 UFSHCD_STATE_EH_SCHEDULED_FATAL,
478 /* Interrupt aggregation support is broken */
479 UFSHCD_QUIRK_BROKEN_INTR_AGGR = 1 << 0,
482 * delay before each dme command is required as the unipro
483 * layer has shown instabilities
485 UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS = 1 << 1,
488 * If UFS host controller is having issue in processing LCC (Line
489 * Control Command) coming from device then enable this quirk.
490 * When this quirk is enabled, host controller driver should disable
491 * the LCC transmission on UFS device (by clearing TX_LCC_ENABLE
492 * attribute of device to 0).
494 UFSHCD_QUIRK_BROKEN_LCC = 1 << 2,
497 * The attribute PA_RXHSUNTERMCAP specifies whether or not the
498 * inbound Link supports unterminated line in HS mode. Setting this
499 * attribute to 1 fixes moving to HS gear.
501 UFSHCD_QUIRK_BROKEN_PA_RXHSUNTERMCAP = 1 << 3,
504 * This quirk needs to be enabled if the host controller only allows
505 * accessing the peer dme attributes in AUTO mode (FAST AUTO or
508 UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE = 1 << 4,
511 * This quirk needs to be enabled if the host controller doesn't
512 * advertise the correct version in UFS_VER register. If this quirk
513 * is enabled, standard UFS host driver will call the vendor specific
514 * ops (get_ufs_hci_version) to get the correct version.
516 UFSHCD_QUIRK_BROKEN_UFS_HCI_VERSION = 1 << 5,
519 * Clear handling for transfer/task request list is just opposite.
521 UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR = 1 << 6,
524 * This quirk needs to be enabled if host controller doesn't allow
525 * that the interrupt aggregation timer and counter are reset by s/w.
527 UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR = 1 << 7,
530 * This quirks needs to be enabled if host controller cannot be
531 * enabled via HCE register.
533 UFSHCI_QUIRK_BROKEN_HCE = 1 << 8,
536 * This quirk needs to be enabled if the host controller regards
537 * resolution of the values of PRDTO and PRDTL in UTRD as byte.
539 UFSHCD_QUIRK_PRDT_BYTE_GRAN = 1 << 9,
542 * This quirk needs to be enabled if the host controller reports
543 * OCS FATAL ERROR with device error through sense data
545 UFSHCD_QUIRK_BROKEN_OCS_FATAL_ERROR = 1 << 10,
548 * This quirk needs to be enabled if the host controller has
549 * auto-hibernate capability but it doesn't work.
551 UFSHCD_QUIRK_BROKEN_AUTO_HIBERN8 = 1 << 11,
554 * This quirk needs to disable manual flush for write booster
556 UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL = 1 << 12,
559 * This quirk needs to disable unipro timeout values
560 * before power mode change
562 UFSHCD_QUIRK_SKIP_DEF_UNIPRO_TIMEOUT_SETTING = 1 << 13,
565 * This quirk allows only sg entries aligned with page size.
567 UFSHCD_QUIRK_ALIGN_SG_WITH_PAGE_SIZE = 1 << 14,
570 * This quirk needs to be enabled if the host controller does not
571 * support UIC command
573 UFSHCD_QUIRK_BROKEN_UIC_CMD = 1 << 15,
576 * This quirk needs to be enabled if the host controller cannot
577 * support physical host configuration.
579 UFSHCD_QUIRK_SKIP_PH_CONFIGURATION = 1 << 16,
582 * This quirk needs to be enabled if the host controller has
583 * 64-bit addressing supported capability but it doesn't work.
585 UFSHCD_QUIRK_BROKEN_64BIT_ADDRESS = 1 << 17,
588 * This quirk needs to be enabled if the host controller has
589 * auto-hibernate capability but it's FASTAUTO only.
591 UFSHCD_QUIRK_HIBERN_FASTAUTO = 1 << 18,
595 /* Allow dynamic clk gating */
596 UFSHCD_CAP_CLK_GATING = 1 << 0,
598 /* Allow hiberb8 with clk gating */
599 UFSHCD_CAP_HIBERN8_WITH_CLK_GATING = 1 << 1,
601 /* Allow dynamic clk scaling */
602 UFSHCD_CAP_CLK_SCALING = 1 << 2,
604 /* Allow auto bkops to enabled during runtime suspend */
605 UFSHCD_CAP_AUTO_BKOPS_SUSPEND = 1 << 3,
608 * This capability allows host controller driver to use the UFS HCI's
609 * interrupt aggregation capability.
610 * CAUTION: Enabling this might reduce overall UFS throughput.
612 UFSHCD_CAP_INTR_AGGR = 1 << 4,
615 * This capability allows the device auto-bkops to be always enabled
616 * except during suspend (both runtime and suspend).
617 * Enabling this capability means that device will always be allowed
618 * to do background operation when it's active but it might degrade
619 * the performance of ongoing read/write operations.
621 UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND = 1 << 5,
624 * This capability allows host controller driver to automatically
625 * enable runtime power management by itself instead of waiting
626 * for userspace to control the power management.
628 UFSHCD_CAP_RPM_AUTOSUSPEND = 1 << 6,
631 * This capability allows the host controller driver to turn-on
632 * WriteBooster, if the underlying device supports it and is
633 * provisioned to be used. This would increase the write performance.
635 UFSHCD_CAP_WB_EN = 1 << 7,
638 * This capability allows the host controller driver to use the
639 * inline crypto engine, if it is present
641 UFSHCD_CAP_CRYPTO = 1 << 8,
644 * This capability allows the controller regulators to be put into
645 * lpm mode aggressively during clock gating.
646 * This would increase power savings.
648 UFSHCD_CAP_AGGR_POWER_COLLAPSE = 1 << 9,
651 * This capability allows the host controller driver to use DeepSleep,
652 * if it is supported by the UFS device. The host controller driver must
653 * support device hardware reset via the hba->device_reset() callback,
654 * in order to exit DeepSleep state.
656 UFSHCD_CAP_DEEPSLEEP = 1 << 10,
659 * This capability allows the host controller driver to use temperature
660 * notification if it is supported by the UFS device.
662 UFSHCD_CAP_TEMP_NOTIF = 1 << 11,
665 struct ufs_hba_variant_params {
666 struct devfreq_dev_profile devfreq_profile;
667 struct devfreq_simple_ondemand_data ondemand_data;
668 u16 hba_enable_delay_us;
669 u32 wb_flush_threshold;
672 #ifdef CONFIG_SCSI_UFS_HPB
674 * struct ufshpb_dev_info - UFSHPB device related info
675 * @num_lu: the number of user logical unit to check whether all lu finished
677 * @rgn_size: device reported HPB region size
678 * @srgn_size: device reported HPB sub-region size
679 * @slave_conf_cnt: counter to check all lu finished initialization
680 * @hpb_disabled: flag to check if HPB is disabled
681 * @max_hpb_single_cmd: device reported bMAX_DATA_SIZE_FOR_SINGLE_CMD value
682 * @is_legacy: flag to check HPB 1.0
683 * @control_mode: either host or device
685 struct ufshpb_dev_info {
689 atomic_t slave_conf_cnt;
691 u8 max_hpb_single_cmd;
697 struct ufs_hba_monitor {
698 unsigned long chunk_size;
700 unsigned long nr_sec_rw[2];
701 ktime_t total_busy[2];
703 unsigned long nr_req[2];
710 ktime_t busy_start_ts[2];
717 * struct ufs_hba - per adapter private structure
718 * @mmio_base: UFSHCI base register address
719 * @ucdl_base_addr: UFS Command Descriptor base address
720 * @utrdl_base_addr: UTP Transfer Request Descriptor base address
721 * @utmrdl_base_addr: UTP Task Management Descriptor base address
722 * @ucdl_dma_addr: UFS Command Descriptor DMA address
723 * @utrdl_dma_addr: UTRDL DMA address
724 * @utmrdl_dma_addr: UTMRDL DMA address
725 * @host: Scsi_Host instance of the driver
726 * @dev: device handle
727 * @ufs_device_wlun: WLUN that controls the entire UFS device.
728 * @hwmon_device: device instance registered with the hwmon core.
729 * @curr_dev_pwr_mode: active UFS device power mode.
730 * @uic_link_state: active state of the link to the UFS device.
731 * @rpm_lvl: desired UFS power management level during runtime PM.
732 * @spm_lvl: desired UFS power management level during system PM.
733 * @pm_op_in_progress: whether or not a PM operation is in progress.
734 * @ahit: value of Auto-Hibernate Idle Timer register.
735 * @lrb: local reference block
736 * @outstanding_tasks: Bits representing outstanding task requests
737 * @outstanding_lock: Protects @outstanding_reqs.
738 * @outstanding_reqs: Bits representing outstanding transfer requests
739 * @capabilities: UFS Controller Capabilities
740 * @nutrs: Transfer Request Queue depth supported by controller
741 * @nutmrs: Task Management Queue depth supported by controller
742 * @reserved_slot: Used to submit device commands. Protected by @dev_cmd.lock.
743 * @ufs_version: UFS Version to which controller complies
744 * @vops: pointer to variant specific operations
745 * @vps: pointer to variant specific parameters
746 * @priv: pointer to variant specific private data
747 * @irq: Irq number of the controller
748 * @is_irq_enabled: whether or not the UFS controller interrupt is enabled.
749 * @dev_ref_clk_freq: reference clock frequency
750 * @quirks: bitmask with information about deviations from the UFSHCI standard.
751 * @dev_quirks: bitmask with information about deviations from the UFS standard.
752 * @tmf_tag_set: TMF tag set.
753 * @tmf_queue: Used to allocate TMF tags.
754 * @tmf_rqs: array with pointers to TMF requests while these are in progress.
755 * @active_uic_cmd: handle of active UIC command
756 * @uic_cmd_mutex: mutex for UIC command
757 * @uic_async_done: completion used during UIC processing
758 * @ufshcd_state: UFSHCD state
759 * @eh_flags: Error handling flags
760 * @intr_mask: Interrupt Mask Bits
761 * @ee_ctrl_mask: Exception event control mask
762 * @ee_drv_mask: Exception event mask for driver
763 * @ee_usr_mask: Exception event mask for user (set via debugfs)
764 * @ee_ctrl_mutex: Used to serialize exception event information.
765 * @is_powered: flag to check if HBA is powered
766 * @shutting_down: flag to check if shutdown has been invoked
767 * @host_sem: semaphore used to serialize concurrent contexts
768 * @eh_wq: Workqueue that eh_work works on
769 * @eh_work: Worker to handle UFS errors that require s/w attention
770 * @eeh_work: Worker to handle exception events
771 * @errors: HBA errors
772 * @uic_error: UFS interconnect layer error status
773 * @saved_err: sticky error mask
774 * @saved_uic_err: sticky UIC error mask
775 * @ufs_stats: various error counters
776 * @force_reset: flag to force eh_work perform a full reset
777 * @force_pmc: flag to force a power mode change
778 * @silence_err_logs: flag to silence error logs
779 * @dev_cmd: ufs device management command information
780 * @last_dme_cmd_tstamp: time stamp of the last completed DME command
781 * @nop_out_timeout: NOP OUT timeout value
782 * @dev_info: information about the UFS device
783 * @auto_bkops_enabled: to track whether bkops is enabled in device
784 * @vreg_info: UFS device voltage regulator information
785 * @clk_list_head: UFS host controller clocks list node head
786 * @req_abort_count: number of times ufshcd_abort() has been called
787 * @lanes_per_direction: number of lanes per data direction between the UFS
788 * controller and the UFS device.
789 * @pwr_info: holds current power mode
790 * @max_pwr_info: keeps the device max valid pwm
791 * @clk_gating: information related to clock gating
792 * @caps: bitmask with information about UFS controller capabilities
793 * @devfreq: frequency scaling information owned by the devfreq core
794 * @clk_scaling: frequency scaling information owned by the UFS driver
795 * @is_sys_suspended: whether or not the entire system has been suspended
796 * @urgent_bkops_lvl: keeps track of urgent bkops level for device
797 * @is_urgent_bkops_lvl_checked: keeps track if the urgent bkops level for
798 * device is known or not.
799 * @clk_scaling_lock: used to serialize device commands and clock scaling
800 * @desc_size: descriptor sizes reported by device
801 * @scsi_block_reqs_cnt: reference counting for scsi block requests
802 * @bsg_dev: struct device associated with the BSG queue
803 * @bsg_queue: BSG queue associated with the UFS controller
804 * @rpm_dev_flush_recheck_work: used to suspend from RPM (runtime power
805 * management) after the UFS device has finished a WriteBooster buffer
806 * flush or auto BKOP.
807 * @ufshpb_dev: information related to HPB (Host Performance Booster).
808 * @monitor: statistics about UFS commands
809 * @crypto_capabilities: Content of crypto capabilities register (0x100)
810 * @crypto_cap_array: Array of crypto capabilities
811 * @crypto_cfg_register: Start of the crypto cfg array
812 * @crypto_profile: the crypto profile of this hba (if applicable)
813 * @debugfs_root: UFS controller debugfs root directory
814 * @debugfs_ee_work: used to restore ee_ctrl_mask after a delay
815 * @debugfs_ee_rate_limit_ms: user configurable delay after which to restore
817 * @luns_avail: number of regular and well known LUNs supported by the UFS
819 * @complete_put: whether or not to call ufshcd_rpm_put() from inside
820 * ufshcd_resume_complete()
823 void __iomem *mmio_base;
825 /* Virtual memory reference */
826 struct utp_transfer_cmd_desc *ucdl_base_addr;
827 struct utp_transfer_req_desc *utrdl_base_addr;
828 struct utp_task_req_desc *utmrdl_base_addr;
830 /* DMA memory reference */
831 dma_addr_t ucdl_dma_addr;
832 dma_addr_t utrdl_dma_addr;
833 dma_addr_t utmrdl_dma_addr;
835 struct Scsi_Host *host;
837 struct scsi_device *ufs_device_wlun;
839 #ifdef CONFIG_SCSI_UFS_HWMON
840 struct device *hwmon_device;
843 enum ufs_dev_pwr_mode curr_dev_pwr_mode;
844 enum uic_link_state uic_link_state;
845 /* Desired UFS power management level during runtime PM */
846 enum ufs_pm_level rpm_lvl;
847 /* Desired UFS power management level during system PM */
848 enum ufs_pm_level spm_lvl;
849 int pm_op_in_progress;
851 /* Auto-Hibernate Idle Timer register value */
854 struct ufshcd_lrb *lrb;
856 unsigned long outstanding_tasks;
857 spinlock_t outstanding_lock;
858 unsigned long outstanding_reqs;
865 const struct ufs_hba_variant_ops *vops;
866 struct ufs_hba_variant_params *vps;
870 enum ufs_ref_clk_freq dev_ref_clk_freq;
872 unsigned int quirks; /* Deviations from standard UFSHCI spec. */
874 /* Device deviations from standard UFS device spec. */
875 unsigned int dev_quirks;
877 struct blk_mq_tag_set tmf_tag_set;
878 struct request_queue *tmf_queue;
879 struct request **tmf_rqs;
881 struct uic_command *active_uic_cmd;
882 struct mutex uic_cmd_mutex;
883 struct completion *uic_async_done;
885 enum ufshcd_state ufshcd_state;
891 struct mutex ee_ctrl_mutex;
894 struct semaphore host_sem;
897 struct workqueue_struct *eh_wq;
898 struct work_struct eh_work;
899 struct work_struct eeh_work;
906 struct ufs_stats ufs_stats;
909 bool silence_err_logs;
911 /* Device management request data */
912 struct ufs_dev_cmd dev_cmd;
913 ktime_t last_dme_cmd_tstamp;
916 /* Keeps information of the UFS device connected to this host */
917 struct ufs_dev_info dev_info;
918 bool auto_bkops_enabled;
919 struct ufs_vreg_info vreg_info;
920 struct list_head clk_list_head;
922 /* Number of requests aborts */
925 /* Number of lanes available (1 or 2) for Rx/Tx */
926 u32 lanes_per_direction;
927 struct ufs_pa_layer_attr pwr_info;
928 struct ufs_pwr_mode_info max_pwr_info;
930 struct ufs_clk_gating clk_gating;
931 /* Control to enable/disable host capabilities */
934 struct devfreq *devfreq;
935 struct ufs_clk_scaling clk_scaling;
936 bool is_sys_suspended;
938 enum bkops_status urgent_bkops_lvl;
939 bool is_urgent_bkops_lvl_checked;
941 struct rw_semaphore clk_scaling_lock;
942 unsigned char desc_size[QUERY_DESC_IDN_MAX];
943 atomic_t scsi_block_reqs_cnt;
945 struct device bsg_dev;
946 struct request_queue *bsg_queue;
947 struct delayed_work rpm_dev_flush_recheck_work;
949 #ifdef CONFIG_SCSI_UFS_HPB
950 struct ufshpb_dev_info ufshpb_dev;
953 struct ufs_hba_monitor monitor;
955 #ifdef CONFIG_SCSI_UFS_CRYPTO
956 union ufs_crypto_capabilities crypto_capabilities;
957 union ufs_crypto_cap_entry *crypto_cap_array;
958 u32 crypto_cfg_register;
959 struct blk_crypto_profile crypto_profile;
961 #ifdef CONFIG_DEBUG_FS
962 struct dentry *debugfs_root;
963 struct delayed_work debugfs_ee_work;
964 u32 debugfs_ee_rate_limit_ms;
970 /* Returns true if clocks can be gated. Otherwise false */
971 static inline bool ufshcd_is_clkgating_allowed(struct ufs_hba *hba)
973 return hba->caps & UFSHCD_CAP_CLK_GATING;
975 static inline bool ufshcd_can_hibern8_during_gating(struct ufs_hba *hba)
977 return hba->caps & UFSHCD_CAP_HIBERN8_WITH_CLK_GATING;
979 static inline int ufshcd_is_clkscaling_supported(struct ufs_hba *hba)
981 return hba->caps & UFSHCD_CAP_CLK_SCALING;
983 static inline bool ufshcd_can_autobkops_during_suspend(struct ufs_hba *hba)
985 return hba->caps & UFSHCD_CAP_AUTO_BKOPS_SUSPEND;
987 static inline bool ufshcd_is_rpm_autosuspend_allowed(struct ufs_hba *hba)
989 return hba->caps & UFSHCD_CAP_RPM_AUTOSUSPEND;
992 static inline bool ufshcd_is_intr_aggr_allowed(struct ufs_hba *hba)
994 return (hba->caps & UFSHCD_CAP_INTR_AGGR) &&
995 !(hba->quirks & UFSHCD_QUIRK_BROKEN_INTR_AGGR);
998 static inline bool ufshcd_can_aggressive_pc(struct ufs_hba *hba)
1000 return !!(ufshcd_is_link_hibern8(hba) &&
1001 (hba->caps & UFSHCD_CAP_AGGR_POWER_COLLAPSE));
1004 static inline bool ufshcd_is_auto_hibern8_supported(struct ufs_hba *hba)
1006 return (hba->capabilities & MASK_AUTO_HIBERN8_SUPPORT) &&
1007 !(hba->quirks & UFSHCD_QUIRK_BROKEN_AUTO_HIBERN8);
1010 static inline bool ufshcd_is_auto_hibern8_enabled(struct ufs_hba *hba)
1012 return FIELD_GET(UFSHCI_AHIBERN8_TIMER_MASK, hba->ahit);
1015 static inline bool ufshcd_is_wb_allowed(struct ufs_hba *hba)
1017 return hba->caps & UFSHCD_CAP_WB_EN;
1020 #define ufshcd_writel(hba, val, reg) \
1021 writel((val), (hba)->mmio_base + (reg))
1022 #define ufshcd_readl(hba, reg) \
1023 readl((hba)->mmio_base + (reg))
1026 * ufshcd_rmwl - perform read/modify/write for a controller register
1027 * @hba: per adapter instance
1028 * @mask: mask to apply on read value
1029 * @val: actual value to write
1030 * @reg: register address
1032 static inline void ufshcd_rmwl(struct ufs_hba *hba, u32 mask, u32 val, u32 reg)
1036 tmp = ufshcd_readl(hba, reg);
1038 tmp |= (val & mask);
1039 ufshcd_writel(hba, tmp, reg);
1042 int ufshcd_alloc_host(struct device *, struct ufs_hba **);
1043 void ufshcd_dealloc_host(struct ufs_hba *);
1044 int ufshcd_hba_enable(struct ufs_hba *hba);
1045 int ufshcd_init(struct ufs_hba *, void __iomem *, unsigned int);
1046 int ufshcd_link_recovery(struct ufs_hba *hba);
1047 int ufshcd_make_hba_operational(struct ufs_hba *hba);
1048 void ufshcd_remove(struct ufs_hba *);
1049 int ufshcd_uic_hibern8_enter(struct ufs_hba *hba);
1050 int ufshcd_uic_hibern8_exit(struct ufs_hba *hba);
1051 void ufshcd_delay_us(unsigned long us, unsigned long tolerance);
1052 void ufshcd_parse_dev_ref_clk_freq(struct ufs_hba *hba, struct clk *refclk);
1053 void ufshcd_update_evt_hist(struct ufs_hba *hba, u32 id, u32 val);
1054 void ufshcd_hba_stop(struct ufs_hba *hba);
1055 void ufshcd_schedule_eh_work(struct ufs_hba *hba);
1057 static inline void check_upiu_size(void)
1059 BUILD_BUG_ON(ALIGNED_UPIU_SIZE <
1060 GENERAL_UPIU_REQUEST_SIZE + QUERY_DESC_MAX_SIZE);
1064 * ufshcd_set_variant - set variant specific data to the hba
1065 * @hba: per adapter instance
1066 * @variant: pointer to variant specific data
1068 static inline void ufshcd_set_variant(struct ufs_hba *hba, void *variant)
1071 hba->priv = variant;
1075 * ufshcd_get_variant - get variant specific data from the hba
1076 * @hba: per adapter instance
1078 static inline void *ufshcd_get_variant(struct ufs_hba *hba)
1085 extern int ufshcd_runtime_suspend(struct device *dev);
1086 extern int ufshcd_runtime_resume(struct device *dev);
1088 #ifdef CONFIG_PM_SLEEP
1089 extern int ufshcd_system_suspend(struct device *dev);
1090 extern int ufshcd_system_resume(struct device *dev);
1092 extern int ufshcd_shutdown(struct ufs_hba *hba);
1093 extern int ufshcd_dme_configure_adapt(struct ufs_hba *hba,
1096 extern int ufshcd_dme_set_attr(struct ufs_hba *hba, u32 attr_sel,
1097 u8 attr_set, u32 mib_val, u8 peer);
1098 extern int ufshcd_dme_get_attr(struct ufs_hba *hba, u32 attr_sel,
1099 u32 *mib_val, u8 peer);
1100 extern int ufshcd_config_pwr_mode(struct ufs_hba *hba,
1101 struct ufs_pa_layer_attr *desired_pwr_mode);
1102 extern int ufshcd_uic_change_pwr_mode(struct ufs_hba *hba, u8 mode);
1104 /* UIC command interfaces for DME primitives */
1107 #define ATTR_SET_NOR 0 /* NORMAL */
1108 #define ATTR_SET_ST 1 /* STATIC */
1110 static inline int ufshcd_dme_set(struct ufs_hba *hba, u32 attr_sel,
1113 return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
1114 mib_val, DME_LOCAL);
1117 static inline int ufshcd_dme_st_set(struct ufs_hba *hba, u32 attr_sel,
1120 return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
1121 mib_val, DME_LOCAL);
1124 static inline int ufshcd_dme_peer_set(struct ufs_hba *hba, u32 attr_sel,
1127 return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
1131 static inline int ufshcd_dme_peer_st_set(struct ufs_hba *hba, u32 attr_sel,
1134 return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
1138 static inline int ufshcd_dme_get(struct ufs_hba *hba,
1139 u32 attr_sel, u32 *mib_val)
1141 return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_LOCAL);
1144 static inline int ufshcd_dme_peer_get(struct ufs_hba *hba,
1145 u32 attr_sel, u32 *mib_val)
1147 return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_PEER);
1150 static inline bool ufshcd_is_hs_mode(struct ufs_pa_layer_attr *pwr_info)
1152 return (pwr_info->pwr_rx == FAST_MODE ||
1153 pwr_info->pwr_rx == FASTAUTO_MODE) &&
1154 (pwr_info->pwr_tx == FAST_MODE ||
1155 pwr_info->pwr_tx == FASTAUTO_MODE);
1158 static inline int ufshcd_disable_host_tx_lcc(struct ufs_hba *hba)
1160 return ufshcd_dme_set(hba, UIC_ARG_MIB(PA_LOCAL_TX_LCC_ENABLE), 0);
1163 /* Expose Query-Request API */
1164 int ufshcd_query_descriptor_retry(struct ufs_hba *hba,
1165 enum query_opcode opcode,
1166 enum desc_idn idn, u8 index,
1168 u8 *desc_buf, int *buf_len);
1169 int ufshcd_read_desc_param(struct ufs_hba *hba,
1170 enum desc_idn desc_id,
1175 int ufshcd_query_attr_retry(struct ufs_hba *hba, enum query_opcode opcode,
1176 enum attr_idn idn, u8 index, u8 selector,
1178 int ufshcd_query_attr(struct ufs_hba *hba, enum query_opcode opcode,
1179 enum attr_idn idn, u8 index, u8 selector, u32 *attr_val);
1180 int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
1181 enum flag_idn idn, u8 index, bool *flag_res);
1183 void ufshcd_auto_hibern8_enable(struct ufs_hba *hba);
1184 void ufshcd_auto_hibern8_update(struct ufs_hba *hba, u32 ahit);
1185 void ufshcd_fixup_dev_quirks(struct ufs_hba *hba,
1186 const struct ufs_dev_quirk *fixups);
1187 #define SD_ASCII_STD true
1188 #define SD_RAW false
1189 int ufshcd_read_string_desc(struct ufs_hba *hba, u8 desc_index,
1190 u8 **buf, bool ascii);
1192 int ufshcd_hold(struct ufs_hba *hba, bool async);
1193 void ufshcd_release(struct ufs_hba *hba);
1195 void ufshcd_clkgate_delay_set(struct device *dev, unsigned long value);
1197 void ufshcd_map_desc_id_to_length(struct ufs_hba *hba, enum desc_idn desc_id,
1200 u32 ufshcd_get_local_unipro_ver(struct ufs_hba *hba);
1202 int ufshcd_get_vreg(struct device *dev, struct ufs_vreg *vreg);
1204 int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd);
1206 int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba,
1207 struct utp_upiu_req *req_upiu,
1208 struct utp_upiu_req *rsp_upiu,
1210 u8 *desc_buff, int *buff_len,
1211 enum query_opcode desc_op);
1213 int ufshcd_wb_toggle(struct ufs_hba *hba, bool enable);
1214 int ufshcd_suspend_prepare(struct device *dev);
1215 int __ufshcd_suspend_prepare(struct device *dev, bool rpm_ok_for_spm);
1216 void ufshcd_resume_complete(struct device *dev);
1218 /* Wrapper functions for safely calling variant operations */
1219 static inline int ufshcd_vops_init(struct ufs_hba *hba)
1221 if (hba->vops && hba->vops->init)
1222 return hba->vops->init(hba);
1227 static inline int ufshcd_vops_phy_initialization(struct ufs_hba *hba)
1229 if (hba->vops && hba->vops->phy_initialization)
1230 return hba->vops->phy_initialization(hba);
1235 extern const struct ufs_pm_lvl_states ufs_pm_lvl_states[];
1237 int ufshcd_dump_regs(struct ufs_hba *hba, size_t offset, size_t len,
1238 const char *prefix);
1240 int __ufshcd_write_ee_control(struct ufs_hba *hba, u32 ee_ctrl_mask);
1241 int ufshcd_write_ee_control(struct ufs_hba *hba);
1242 int ufshcd_update_ee_control(struct ufs_hba *hba, u16 *mask,
1243 const u16 *other_mask, u16 set, u16 clr);
1245 #endif /* End of Header */