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ufshcd.h
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ufshcd.h
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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Universal Flash Storage Host controller driver
* Copyright (C) 2011-2013 Samsung India Software Operations
* Copyright (c) 2013-2016, The Linux Foundation. All rights reserved.
*
* Authors:
* Santosh Yaraganavi <[email protected]>
* Vinayak Holikatti <[email protected]>
*/
#ifndef _UFSHCD_H
#define _UFSHCD_H
#include <linux/bitfield.h>
#include <linux/blk-crypto-profile.h>
#include <linux/blk-mq.h>
#include <linux/devfreq.h>
#include <linux/msi.h>
#include <linux/pm_runtime.h>
#include <linux/dma-direction.h>
#include <scsi/scsi_device.h>
#include <ufs/unipro.h>
#include <ufs/ufs.h>
#include <ufs/ufs_quirks.h>
#include <ufs/ufshci.h>
#define UFSHCD "ufshcd"
struct ufs_hba;
enum dev_cmd_type {
DEV_CMD_TYPE_NOP = 0x0,
DEV_CMD_TYPE_QUERY = 0x1,
DEV_CMD_TYPE_RPMB = 0x2,
};
enum ufs_event_type {
/* uic specific errors */
UFS_EVT_PA_ERR = 0,
UFS_EVT_DL_ERR,
UFS_EVT_NL_ERR,
UFS_EVT_TL_ERR,
UFS_EVT_DME_ERR,
/* fatal errors */
UFS_EVT_AUTO_HIBERN8_ERR,
UFS_EVT_FATAL_ERR,
UFS_EVT_LINK_STARTUP_FAIL,
UFS_EVT_RESUME_ERR,
UFS_EVT_SUSPEND_ERR,
UFS_EVT_WL_SUSP_ERR,
UFS_EVT_WL_RES_ERR,
/* abnormal events */
UFS_EVT_DEV_RESET,
UFS_EVT_HOST_RESET,
UFS_EVT_ABORT,
UFS_EVT_CNT,
};
/**
* struct uic_command - UIC command structure
* @command: UIC command
* @argument1: UIC command argument 1
* @argument2: UIC command argument 2
* @argument3: UIC command argument 3
* @cmd_active: Indicate if UIC command is outstanding
* @done: UIC command completion
*/
struct uic_command {
u32 command;
u32 argument1;
u32 argument2;
u32 argument3;
int cmd_active;
struct completion done;
};
/* Used to differentiate the power management options */
enum ufs_pm_op {
UFS_RUNTIME_PM,
UFS_SYSTEM_PM,
UFS_SHUTDOWN_PM,
};
/* Host <-> Device UniPro Link state */
enum uic_link_state {
UIC_LINK_OFF_STATE = 0, /* Link powered down or disabled */
UIC_LINK_ACTIVE_STATE = 1, /* Link is in Fast/Slow/Sleep state */
UIC_LINK_HIBERN8_STATE = 2, /* Link is in Hibernate state */
UIC_LINK_BROKEN_STATE = 3, /* Link is in broken state */
};
#define ufshcd_is_link_off(hba) ((hba)->uic_link_state == UIC_LINK_OFF_STATE)
#define ufshcd_is_link_active(hba) ((hba)->uic_link_state == \
UIC_LINK_ACTIVE_STATE)
#define ufshcd_is_link_hibern8(hba) ((hba)->uic_link_state == \
UIC_LINK_HIBERN8_STATE)
#define ufshcd_is_link_broken(hba) ((hba)->uic_link_state == \
UIC_LINK_BROKEN_STATE)
#define ufshcd_set_link_off(hba) ((hba)->uic_link_state = UIC_LINK_OFF_STATE)
#define ufshcd_set_link_active(hba) ((hba)->uic_link_state = \
UIC_LINK_ACTIVE_STATE)
#define ufshcd_set_link_hibern8(hba) ((hba)->uic_link_state = \
UIC_LINK_HIBERN8_STATE)
#define ufshcd_set_link_broken(hba) ((hba)->uic_link_state = \
UIC_LINK_BROKEN_STATE)
#define ufshcd_set_ufs_dev_active(h) \
((h)->curr_dev_pwr_mode = UFS_ACTIVE_PWR_MODE)
#define ufshcd_set_ufs_dev_sleep(h) \
((h)->curr_dev_pwr_mode = UFS_SLEEP_PWR_MODE)
#define ufshcd_set_ufs_dev_poweroff(h) \
((h)->curr_dev_pwr_mode = UFS_POWERDOWN_PWR_MODE)
#define ufshcd_set_ufs_dev_deepsleep(h) \
((h)->curr_dev_pwr_mode = UFS_DEEPSLEEP_PWR_MODE)
#define ufshcd_is_ufs_dev_active(h) \
((h)->curr_dev_pwr_mode == UFS_ACTIVE_PWR_MODE)
#define ufshcd_is_ufs_dev_sleep(h) \
((h)->curr_dev_pwr_mode == UFS_SLEEP_PWR_MODE)
#define ufshcd_is_ufs_dev_poweroff(h) \
((h)->curr_dev_pwr_mode == UFS_POWERDOWN_PWR_MODE)
#define ufshcd_is_ufs_dev_deepsleep(h) \
((h)->curr_dev_pwr_mode == UFS_DEEPSLEEP_PWR_MODE)
/*
* UFS Power management levels.
* Each level is in increasing order of power savings, except DeepSleep
* which is lower than PowerDown with power on but not PowerDown with
* power off.
*/
enum ufs_pm_level {
UFS_PM_LVL_0,
UFS_PM_LVL_1,
UFS_PM_LVL_2,
UFS_PM_LVL_3,
UFS_PM_LVL_4,
UFS_PM_LVL_5,
UFS_PM_LVL_6,
UFS_PM_LVL_MAX
};
struct ufs_pm_lvl_states {
enum ufs_dev_pwr_mode dev_state;
enum uic_link_state link_state;
};
/**
* struct ufshcd_lrb - local reference block
* @utr_descriptor_ptr: UTRD address of the command
* @ucd_req_ptr: UCD address of the command
* @ucd_rsp_ptr: Response UPIU address for this command
* @ucd_prdt_ptr: PRDT address of the command
* @utrd_dma_addr: UTRD dma address for debug
* @ucd_prdt_dma_addr: PRDT dma address for debug
* @ucd_rsp_dma_addr: UPIU response dma address for debug
* @ucd_req_dma_addr: UPIU request dma address for debug
* @cmd: pointer to SCSI command
* @scsi_status: SCSI status of the command
* @command_type: SCSI, UFS, Query.
* @task_tag: Task tag of the command
* @lun: LUN of the command
* @intr_cmd: Interrupt command (doesn't participate in interrupt aggregation)
* @issue_time_stamp: time stamp for debug purposes (CLOCK_MONOTONIC)
* @issue_time_stamp_local_clock: time stamp for debug purposes (local_clock)
* @compl_time_stamp: time stamp for statistics (CLOCK_MONOTONIC)
* @compl_time_stamp_local_clock: time stamp for debug purposes (local_clock)
* @crypto_key_slot: the key slot to use for inline crypto (-1 if none)
* @data_unit_num: the data unit number for the first block for inline crypto
* @req_abort_skip: skip request abort task flag
*/
struct ufshcd_lrb {
struct utp_transfer_req_desc *utr_descriptor_ptr;
struct utp_upiu_req *ucd_req_ptr;
struct utp_upiu_rsp *ucd_rsp_ptr;
struct ufshcd_sg_entry *ucd_prdt_ptr;
dma_addr_t utrd_dma_addr;
dma_addr_t ucd_req_dma_addr;
dma_addr_t ucd_rsp_dma_addr;
dma_addr_t ucd_prdt_dma_addr;
struct scsi_cmnd *cmd;
int scsi_status;
int command_type;
int task_tag;
u8 lun; /* UPIU LUN id field is only 8-bit wide */
bool intr_cmd;
ktime_t issue_time_stamp;
u64 issue_time_stamp_local_clock;
ktime_t compl_time_stamp;
u64 compl_time_stamp_local_clock;
#ifdef CONFIG_SCSI_UFS_CRYPTO
int crypto_key_slot;
u64 data_unit_num;
#endif
bool req_abort_skip;
};
/**
* struct ufs_query - holds relevant data structures for query request
* @request: request upiu and function
* @descriptor: buffer for sending/receiving descriptor
* @response: response upiu and response
*/
struct ufs_query {
struct ufs_query_req request;
u8 *descriptor;
struct ufs_query_res response;
};
/**
* struct ufs_dev_cmd - all assosiated fields with device management commands
* @type: device management command type - Query, NOP OUT
* @lock: lock to allow one command at a time
* @complete: internal commands completion
* @query: Device management query information
*/
struct ufs_dev_cmd {
enum dev_cmd_type type;
struct mutex lock;
struct completion *complete;
struct ufs_query query;
struct cq_entry *cqe;
};
/**
* struct ufs_clk_info - UFS clock related info
* @list: list headed by hba->clk_list_head
* @clk: clock node
* @name: clock name
* @max_freq: maximum frequency supported by the clock
* @min_freq: min frequency that can be used for clock scaling
* @curr_freq: indicates the current frequency that it is set to
* @keep_link_active: indicates that the clk should not be disabled if
* link is active
* @enabled: variable to check against multiple enable/disable
*/
struct ufs_clk_info {
struct list_head list;
struct clk *clk;
const char *name;
u32 max_freq;
u32 min_freq;
u32 curr_freq;
bool keep_link_active;
bool enabled;
};
enum ufs_notify_change_status {
PRE_CHANGE,
POST_CHANGE,
};
struct ufs_pa_layer_attr {
u32 gear_rx;
u32 gear_tx;
u32 lane_rx;
u32 lane_tx;
u32 pwr_rx;
u32 pwr_tx;
u32 hs_rate;
};
struct ufs_pwr_mode_info {
bool is_valid;
struct ufs_pa_layer_attr info;
};
/**
* struct ufs_hba_variant_ops - variant specific callbacks
* @name: variant name
* @init: called when the driver is initialized
* @exit: called to cleanup everything done in init
* @get_ufs_hci_version: called to get UFS HCI version
* @clk_scale_notify: notifies that clks are scaled up/down
* @setup_clocks: called before touching any of the controller registers
* @hce_enable_notify: called before and after HCE enable bit is set to allow
* variant specific Uni-Pro initialization.
* @link_startup_notify: called before and after Link startup is carried out
* to allow variant specific Uni-Pro initialization.
* @pwr_change_notify: called before and after a power mode change
* is carried out to allow vendor spesific capabilities
* to be set.
* @setup_xfer_req: called before any transfer request is issued
* to set some things
* @setup_task_mgmt: called before any task management request is issued
* to set some things
* @hibern8_notify: called around hibern8 enter/exit
* @apply_dev_quirks: called to apply device specific quirks
* @fixup_dev_quirks: called to modify device specific quirks
* @suspend: called during host controller PM callback
* @resume: called during host controller PM callback
* @dbg_register_dump: used to dump controller debug information
* @phy_initialization: used to initialize phys
* @device_reset: called to issue a reset pulse on the UFS device
* @config_scaling_param: called to configure clock scaling parameters
* @program_key: program or evict an inline encryption key
* @event_notify: called to notify important events
* @reinit_notify: called to notify reinit of UFSHCD during max gear switch
* @mcq_config_resource: called to configure MCQ platform resources
* @get_hba_mac: called to get vendor specific mac value, mandatory for mcq mode
* @op_runtime_config: called to config Operation and runtime regs Pointers
* @get_outstanding_cqs: called to get outstanding completion queues
* @config_esi: called to config Event Specific Interrupt
*/
struct ufs_hba_variant_ops {
const char *name;
int (*init)(struct ufs_hba *);
void (*exit)(struct ufs_hba *);
u32 (*get_ufs_hci_version)(struct ufs_hba *);
int (*clk_scale_notify)(struct ufs_hba *, bool,
enum ufs_notify_change_status);
int (*setup_clocks)(struct ufs_hba *, bool,
enum ufs_notify_change_status);
int (*hce_enable_notify)(struct ufs_hba *,
enum ufs_notify_change_status);
int (*link_startup_notify)(struct ufs_hba *,
enum ufs_notify_change_status);
int (*pwr_change_notify)(struct ufs_hba *,
enum ufs_notify_change_status status,
struct ufs_pa_layer_attr *,
struct ufs_pa_layer_attr *);
void (*setup_xfer_req)(struct ufs_hba *hba, int tag,
bool is_scsi_cmd);
void (*setup_task_mgmt)(struct ufs_hba *, int, u8);
void (*hibern8_notify)(struct ufs_hba *, enum uic_cmd_dme,
enum ufs_notify_change_status);
int (*apply_dev_quirks)(struct ufs_hba *hba);
void (*fixup_dev_quirks)(struct ufs_hba *hba);
int (*suspend)(struct ufs_hba *, enum ufs_pm_op,
enum ufs_notify_change_status);
int (*resume)(struct ufs_hba *, enum ufs_pm_op);
void (*dbg_register_dump)(struct ufs_hba *hba);
int (*phy_initialization)(struct ufs_hba *);
int (*device_reset)(struct ufs_hba *hba);
void (*config_scaling_param)(struct ufs_hba *hba,
struct devfreq_dev_profile *profile,
struct devfreq_simple_ondemand_data *data);
int (*program_key)(struct ufs_hba *hba,
const union ufs_crypto_cfg_entry *cfg, int slot);
void (*event_notify)(struct ufs_hba *hba,
enum ufs_event_type evt, void *data);
void (*reinit_notify)(struct ufs_hba *);
int (*mcq_config_resource)(struct ufs_hba *hba);
int (*get_hba_mac)(struct ufs_hba *hba);
int (*op_runtime_config)(struct ufs_hba *hba);
int (*get_outstanding_cqs)(struct ufs_hba *hba,
unsigned long *ocqs);
int (*config_esi)(struct ufs_hba *hba);
};
/* clock gating state */
enum clk_gating_state {
CLKS_OFF,
CLKS_ON,
REQ_CLKS_OFF,
REQ_CLKS_ON,
};
/**
* struct ufs_clk_gating - UFS clock gating related info
* @gate_work: worker to turn off clocks after some delay as specified in
* delay_ms
* @ungate_work: worker to turn on clocks that will be used in case of
* interrupt context
* @state: the current clocks state
* @delay_ms: gating delay in ms
* @is_suspended: clk gating is suspended when set to 1 which can be used
* during suspend/resume
* @delay_attr: sysfs attribute to control delay_attr
* @enable_attr: sysfs attribute to enable/disable clock gating
* @is_enabled: Indicates the current status of clock gating
* @is_initialized: Indicates whether clock gating is initialized or not
* @active_reqs: number of requests that are pending and should be waited for
* completion before gating clocks.
* @clk_gating_workq: workqueue for clock gating work.
*/
struct ufs_clk_gating {
struct delayed_work gate_work;
struct work_struct ungate_work;
enum clk_gating_state state;
unsigned long delay_ms;
bool is_suspended;
struct device_attribute delay_attr;
struct device_attribute enable_attr;
bool is_enabled;
bool is_initialized;
int active_reqs;
struct workqueue_struct *clk_gating_workq;
};
/**
* struct ufs_clk_scaling - UFS clock scaling related data
* @active_reqs: number of requests that are pending. If this is zero when
* devfreq ->target() function is called then schedule "suspend_work" to
* suspend devfreq.
* @tot_busy_t: Total busy time in current polling window
* @window_start_t: Start time (in jiffies) of the current polling window
* @busy_start_t: Start time of current busy period
* @enable_attr: sysfs attribute to enable/disable clock scaling
* @saved_pwr_info: UFS power mode may also be changed during scaling and this
* one keeps track of previous power mode.
* @workq: workqueue to schedule devfreq suspend/resume work
* @suspend_work: worker to suspend devfreq
* @resume_work: worker to resume devfreq
* @min_gear: lowest HS gear to scale down to
* @is_enabled: tracks if scaling is currently enabled or not, controlled by
* clkscale_enable sysfs node
* @is_allowed: tracks if scaling is currently allowed or not, used to block
* clock scaling which is not invoked from devfreq governor
* @is_initialized: Indicates whether clock scaling is initialized or not
* @is_busy_started: tracks if busy period has started or not
* @is_suspended: tracks if devfreq is suspended or not
*/
struct ufs_clk_scaling {
int active_reqs;
unsigned long tot_busy_t;
ktime_t window_start_t;
ktime_t busy_start_t;
struct device_attribute enable_attr;
struct ufs_pa_layer_attr saved_pwr_info;
struct workqueue_struct *workq;
struct work_struct suspend_work;
struct work_struct resume_work;
u32 min_gear;
bool is_enabled;
bool is_allowed;
bool is_initialized;
bool is_busy_started;
bool is_suspended;
};
#define UFS_EVENT_HIST_LENGTH 8
/**
* struct ufs_event_hist - keeps history of errors
* @pos: index to indicate cyclic buffer position
* @val: cyclic buffer for registers value
* @tstamp: cyclic buffer for time stamp
* @cnt: error counter
*/
struct ufs_event_hist {
int pos;
u32 val[UFS_EVENT_HIST_LENGTH];
u64 tstamp[UFS_EVENT_HIST_LENGTH];
unsigned long long cnt;
};
/**
* struct ufs_stats - keeps usage/err statistics
* @last_intr_status: record the last interrupt status.
* @last_intr_ts: record the last interrupt timestamp.
* @hibern8_exit_cnt: Counter to keep track of number of exits,
* reset this after link-startup.
* @last_hibern8_exit_tstamp: Set time after the hibern8 exit.
* Clear after the first successful command completion.
* @event: array with event history.
*/
struct ufs_stats {
u32 last_intr_status;
u64 last_intr_ts;
u32 hibern8_exit_cnt;
u64 last_hibern8_exit_tstamp;
struct ufs_event_hist event[UFS_EVT_CNT];
};
/**
* enum ufshcd_state - UFS host controller state
* @UFSHCD_STATE_RESET: Link is not operational. Postpone SCSI command
* processing.
* @UFSHCD_STATE_OPERATIONAL: The host controller is operational and can process
* SCSI commands.
* @UFSHCD_STATE_EH_SCHEDULED_NON_FATAL: The error handler has been scheduled.
* SCSI commands may be submitted to the controller.
* @UFSHCD_STATE_EH_SCHEDULED_FATAL: The error handler has been scheduled. Fail
* newly submitted SCSI commands with error code DID_BAD_TARGET.
* @UFSHCD_STATE_ERROR: An unrecoverable error occurred, e.g. link recovery
* failed. Fail all SCSI commands with error code DID_ERROR.
*/
enum ufshcd_state {
UFSHCD_STATE_RESET,
UFSHCD_STATE_OPERATIONAL,
UFSHCD_STATE_EH_SCHEDULED_NON_FATAL,
UFSHCD_STATE_EH_SCHEDULED_FATAL,
UFSHCD_STATE_ERROR,
};
enum ufshcd_quirks {
/* Interrupt aggregation support is broken */
UFSHCD_QUIRK_BROKEN_INTR_AGGR = 1 << 0,
/*
* delay before each dme command is required as the unipro
* layer has shown instabilities
*/
UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS = 1 << 1,
/*
* If UFS host controller is having issue in processing LCC (Line
* Control Command) coming from device then enable this quirk.
* When this quirk is enabled, host controller driver should disable
* the LCC transmission on UFS device (by clearing TX_LCC_ENABLE
* attribute of device to 0).
*/
UFSHCD_QUIRK_BROKEN_LCC = 1 << 2,
/*
* The attribute PA_RXHSUNTERMCAP specifies whether or not the
* inbound Link supports unterminated line in HS mode. Setting this
* attribute to 1 fixes moving to HS gear.
*/
UFSHCD_QUIRK_BROKEN_PA_RXHSUNTERMCAP = 1 << 3,
/*
* This quirk needs to be enabled if the host controller only allows
* accessing the peer dme attributes in AUTO mode (FAST AUTO or
* SLOW AUTO).
*/
UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE = 1 << 4,
/*
* This quirk needs to be enabled if the host controller doesn't
* advertise the correct version in UFS_VER register. If this quirk
* is enabled, standard UFS host driver will call the vendor specific
* ops (get_ufs_hci_version) to get the correct version.
*/
UFSHCD_QUIRK_BROKEN_UFS_HCI_VERSION = 1 << 5,
/*
* Clear handling for transfer/task request list is just opposite.
*/
UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR = 1 << 6,
/*
* This quirk needs to be enabled if host controller doesn't allow
* that the interrupt aggregation timer and counter are reset by s/w.
*/
UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR = 1 << 7,
/*
* This quirks needs to be enabled if host controller cannot be
* enabled via HCE register.
*/
UFSHCI_QUIRK_BROKEN_HCE = 1 << 8,
/*
* This quirk needs to be enabled if the host controller regards
* resolution of the values of PRDTO and PRDTL in UTRD as byte.
*/
UFSHCD_QUIRK_PRDT_BYTE_GRAN = 1 << 9,
/*
* This quirk needs to be enabled if the host controller reports
* OCS FATAL ERROR with device error through sense data
*/
UFSHCD_QUIRK_BROKEN_OCS_FATAL_ERROR = 1 << 10,
/*
* This quirk needs to be enabled if the host controller has
* auto-hibernate capability but it doesn't work.
*/
UFSHCD_QUIRK_BROKEN_AUTO_HIBERN8 = 1 << 11,
/*
* This quirk needs to disable manual flush for write booster
*/
UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL = 1 << 12,
/*
* This quirk needs to disable unipro timeout values
* before power mode change
*/
UFSHCD_QUIRK_SKIP_DEF_UNIPRO_TIMEOUT_SETTING = 1 << 13,
/*
* Align DMA SG entries on a 4 KiB boundary.
*/
UFSHCD_QUIRK_4KB_DMA_ALIGNMENT = 1 << 14,
/*
* This quirk needs to be enabled if the host controller does not
* support UIC command
*/
UFSHCD_QUIRK_BROKEN_UIC_CMD = 1 << 15,
/*
* This quirk needs to be enabled if the host controller cannot
* support physical host configuration.
*/
UFSHCD_QUIRK_SKIP_PH_CONFIGURATION = 1 << 16,
/*
* This quirk needs to be enabled if the host controller has
* 64-bit addressing supported capability but it doesn't work.
*/
UFSHCD_QUIRK_BROKEN_64BIT_ADDRESS = 1 << 17,
/*
* This quirk needs to be enabled if the host controller has
* auto-hibernate capability but it's FASTAUTO only.
*/
UFSHCD_QUIRK_HIBERN_FASTAUTO = 1 << 18,
/*
* This quirk needs to be enabled if the host controller needs
* to reinit the device after switching to maximum gear.
*/
UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH = 1 << 19,
};
enum ufshcd_caps {
/* Allow dynamic clk gating */
UFSHCD_CAP_CLK_GATING = 1 << 0,
/* Allow hiberb8 with clk gating */
UFSHCD_CAP_HIBERN8_WITH_CLK_GATING = 1 << 1,
/* Allow dynamic clk scaling */
UFSHCD_CAP_CLK_SCALING = 1 << 2,
/* Allow auto bkops to enabled during runtime suspend */
UFSHCD_CAP_AUTO_BKOPS_SUSPEND = 1 << 3,
/*
* This capability allows host controller driver to use the UFS HCI's
* interrupt aggregation capability.
* CAUTION: Enabling this might reduce overall UFS throughput.
*/
UFSHCD_CAP_INTR_AGGR = 1 << 4,
/*
* This capability allows the device auto-bkops to be always enabled
* except during suspend (both runtime and suspend).
* Enabling this capability means that device will always be allowed
* to do background operation when it's active but it might degrade
* the performance of ongoing read/write operations.
*/
UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND = 1 << 5,
/*
* This capability allows host controller driver to automatically
* enable runtime power management by itself instead of waiting
* for userspace to control the power management.
*/
UFSHCD_CAP_RPM_AUTOSUSPEND = 1 << 6,
/*
* This capability allows the host controller driver to turn-on
* WriteBooster, if the underlying device supports it and is
* provisioned to be used. This would increase the write performance.
*/
UFSHCD_CAP_WB_EN = 1 << 7,
/*
* This capability allows the host controller driver to use the
* inline crypto engine, if it is present
*/
UFSHCD_CAP_CRYPTO = 1 << 8,
/*
* This capability allows the controller regulators to be put into
* lpm mode aggressively during clock gating.
* This would increase power savings.
*/
UFSHCD_CAP_AGGR_POWER_COLLAPSE = 1 << 9,
/*
* This capability allows the host controller driver to use DeepSleep,
* if it is supported by the UFS device. The host controller driver must
* support device hardware reset via the hba->device_reset() callback,
* in order to exit DeepSleep state.
*/
UFSHCD_CAP_DEEPSLEEP = 1 << 10,
/*
* This capability allows the host controller driver to use temperature
* notification if it is supported by the UFS device.
*/
UFSHCD_CAP_TEMP_NOTIF = 1 << 11,
/*
* Enable WriteBooster when scaling up the clock and disable
* WriteBooster when scaling the clock down.
*/
UFSHCD_CAP_WB_WITH_CLK_SCALING = 1 << 12,
};
struct ufs_hba_variant_params {
struct devfreq_dev_profile devfreq_profile;
struct devfreq_simple_ondemand_data ondemand_data;
u16 hba_enable_delay_us;
u32 wb_flush_threshold;
};
#ifdef CONFIG_SCSI_UFS_HPB
/**
* struct ufshpb_dev_info - UFSHPB device related info
* @num_lu: the number of user logical unit to check whether all lu finished
* initialization
* @rgn_size: device reported HPB region size
* @srgn_size: device reported HPB sub-region size
* @slave_conf_cnt: counter to check all lu finished initialization
* @hpb_disabled: flag to check if HPB is disabled
* @max_hpb_single_cmd: device reported bMAX_DATA_SIZE_FOR_SINGLE_CMD value
* @is_legacy: flag to check HPB 1.0
* @control_mode: either host or device
*/
struct ufshpb_dev_info {
int num_lu;
int rgn_size;
int srgn_size;
atomic_t slave_conf_cnt;
bool hpb_disabled;
u8 max_hpb_single_cmd;
bool is_legacy;
u8 control_mode;
};
#endif
struct ufs_hba_monitor {
unsigned long chunk_size;
unsigned long nr_sec_rw[2];
ktime_t total_busy[2];
unsigned long nr_req[2];
/* latencies*/
ktime_t lat_sum[2];
ktime_t lat_max[2];
ktime_t lat_min[2];
u32 nr_queued[2];
ktime_t busy_start_ts[2];
ktime_t enabled_ts;
bool enabled;
};
/**
* struct ufshcd_res_info_t - MCQ related resource regions
*
* @name: resource name
* @resource: pointer to resource region
* @base: register base address
*/
struct ufshcd_res_info {
const char *name;
struct resource *resource;
void __iomem *base;
};
enum ufshcd_res {
RES_UFS,
RES_MCQ,
RES_MCQ_SQD,
RES_MCQ_SQIS,
RES_MCQ_CQD,
RES_MCQ_CQIS,
RES_MCQ_VS,
RES_MAX,
};
/**
* struct ufshcd_mcq_opr_info_t - Operation and Runtime registers
*
* @offset: Doorbell Address Offset
* @stride: Steps proportional to queue [0...31]
* @base: base address
*/
struct ufshcd_mcq_opr_info_t {
unsigned long offset;
unsigned long stride;
void __iomem *base;
};
enum ufshcd_mcq_opr {
OPR_SQD,
OPR_SQIS,
OPR_CQD,
OPR_CQIS,
OPR_MAX,
};
/**
* struct ufs_hba - per adapter private structure
* @mmio_base: UFSHCI base register address
* @ucdl_base_addr: UFS Command Descriptor base address
* @utrdl_base_addr: UTP Transfer Request Descriptor base address
* @utmrdl_base_addr: UTP Task Management Descriptor base address
* @ucdl_dma_addr: UFS Command Descriptor DMA address
* @utrdl_dma_addr: UTRDL DMA address
* @utmrdl_dma_addr: UTMRDL DMA address
* @host: Scsi_Host instance of the driver
* @dev: device handle
* @ufs_device_wlun: WLUN that controls the entire UFS device.
* @hwmon_device: device instance registered with the hwmon core.
* @curr_dev_pwr_mode: active UFS device power mode.
* @uic_link_state: active state of the link to the UFS device.
* @rpm_lvl: desired UFS power management level during runtime PM.
* @spm_lvl: desired UFS power management level during system PM.
* @pm_op_in_progress: whether or not a PM operation is in progress.
* @ahit: value of Auto-Hibernate Idle Timer register.
* @lrb: local reference block
* @outstanding_tasks: Bits representing outstanding task requests
* @outstanding_lock: Protects @outstanding_reqs.
* @outstanding_reqs: Bits representing outstanding transfer requests
* @capabilities: UFS Controller Capabilities
* @mcq_capabilities: UFS Multi Circular Queue capabilities
* @nutrs: Transfer Request Queue depth supported by controller
* @nutmrs: Task Management Queue depth supported by controller
* @reserved_slot: Used to submit device commands. Protected by @dev_cmd.lock.
* @ufs_version: UFS Version to which controller complies
* @vops: pointer to variant specific operations
* @vps: pointer to variant specific parameters
* @priv: pointer to variant specific private data
* @sg_entry_size: size of struct ufshcd_sg_entry (may include variant fields)
* @irq: Irq number of the controller
* @is_irq_enabled: whether or not the UFS controller interrupt is enabled.
* @dev_ref_clk_freq: reference clock frequency
* @quirks: bitmask with information about deviations from the UFSHCI standard.
* @dev_quirks: bitmask with information about deviations from the UFS standard.
* @tmf_tag_set: TMF tag set.
* @tmf_queue: Used to allocate TMF tags.
* @tmf_rqs: array with pointers to TMF requests while these are in progress.
* @active_uic_cmd: handle of active UIC command
* @uic_cmd_mutex: mutex for UIC command
* @uic_async_done: completion used during UIC processing
* @ufshcd_state: UFSHCD state
* @eh_flags: Error handling flags
* @intr_mask: Interrupt Mask Bits
* @ee_ctrl_mask: Exception event control mask
* @ee_drv_mask: Exception event mask for driver
* @ee_usr_mask: Exception event mask for user (set via debugfs)
* @ee_ctrl_mutex: Used to serialize exception event information.
* @is_powered: flag to check if HBA is powered
* @shutting_down: flag to check if shutdown has been invoked
* @host_sem: semaphore used to serialize concurrent contexts
* @eh_wq: Workqueue that eh_work works on
* @eh_work: Worker to handle UFS errors that require s/w attention
* @eeh_work: Worker to handle exception events
* @errors: HBA errors
* @uic_error: UFS interconnect layer error status
* @saved_err: sticky error mask
* @saved_uic_err: sticky UIC error mask
* @ufs_stats: various error counters
* @force_reset: flag to force eh_work perform a full reset
* @force_pmc: flag to force a power mode change
* @silence_err_logs: flag to silence error logs
* @dev_cmd: ufs device management command information
* @last_dme_cmd_tstamp: time stamp of the last completed DME command
* @nop_out_timeout: NOP OUT timeout value
* @dev_info: information about the UFS device
* @auto_bkops_enabled: to track whether bkops is enabled in device
* @vreg_info: UFS device voltage regulator information
* @clk_list_head: UFS host controller clocks list node head
* @req_abort_count: number of times ufshcd_abort() has been called
* @lanes_per_direction: number of lanes per data direction between the UFS
* controller and the UFS device.
* @pwr_info: holds current power mode
* @max_pwr_info: keeps the device max valid pwm
* @clk_gating: information related to clock gating
* @caps: bitmask with information about UFS controller capabilities
* @devfreq: frequency scaling information owned by the devfreq core
* @clk_scaling: frequency scaling information owned by the UFS driver
* @system_suspending: system suspend has been started and system resume has
* not yet finished.
* @is_sys_suspended: UFS device has been suspended because of system suspend
* @urgent_bkops_lvl: keeps track of urgent bkops level for device
* @is_urgent_bkops_lvl_checked: keeps track if the urgent bkops level for
* device is known or not.
* @wb_mutex: used to serialize devfreq and sysfs write booster toggling
* @clk_scaling_lock: used to serialize device commands and clock scaling
* @desc_size: descriptor sizes reported by device
* @scsi_block_reqs_cnt: reference counting for scsi block requests
* @bsg_dev: struct device associated with the BSG queue
* @bsg_queue: BSG queue associated with the UFS controller
* @rpm_dev_flush_recheck_work: used to suspend from RPM (runtime power
* management) after the UFS device has finished a WriteBooster buffer
* flush or auto BKOP.
* @ufshpb_dev: information related to HPB (Host Performance Booster).
* @monitor: statistics about UFS commands
* @crypto_capabilities: Content of crypto capabilities register (0x100)
* @crypto_cap_array: Array of crypto capabilities
* @crypto_cfg_register: Start of the crypto cfg array
* @crypto_profile: the crypto profile of this hba (if applicable)
* @debugfs_root: UFS controller debugfs root directory
* @debugfs_ee_work: used to restore ee_ctrl_mask after a delay
* @debugfs_ee_rate_limit_ms: user configurable delay after which to restore
* ee_ctrl_mask
* @luns_avail: number of regular and well known LUNs supported by the UFS
* device
* @nr_hw_queues: number of hardware queues configured
* @nr_queues: number of Queues of different queue types
* @complete_put: whether or not to call ufshcd_rpm_put() from inside
* ufshcd_resume_complete()
* @ext_iid_sup: is EXT_IID is supported by UFSHC
* @mcq_sup: is mcq supported by UFSHC
* @mcq_enabled: is mcq ready to accept requests
* @res: array of resource info of MCQ registers
* @mcq_base: Multi circular queue registers base address
* @uhq: array of supported hardware queues
* @dev_cmd_queue: Queue for issuing device management commands
*/
struct ufs_hba {
void __iomem *mmio_base;
/* Virtual memory reference */
struct utp_transfer_cmd_desc *ucdl_base_addr;
struct utp_transfer_req_desc *utrdl_base_addr;
struct utp_task_req_desc *utmrdl_base_addr;
/* DMA memory reference */
dma_addr_t ucdl_dma_addr;
dma_addr_t utrdl_dma_addr;
dma_addr_t utmrdl_dma_addr;
struct Scsi_Host *host;
struct device *dev;
struct scsi_device *ufs_device_wlun;
#ifdef CONFIG_SCSI_UFS_HWMON
struct device *hwmon_device;
#endif
enum ufs_dev_pwr_mode curr_dev_pwr_mode;
enum uic_link_state uic_link_state;
/* Desired UFS power management level during runtime PM */
enum ufs_pm_level rpm_lvl;
/* Desired UFS power management level during system PM */
enum ufs_pm_level spm_lvl;
int pm_op_in_progress;
/* Auto-Hibernate Idle Timer register value */
u32 ahit;
struct ufshcd_lrb *lrb;
unsigned long outstanding_tasks;
spinlock_t outstanding_lock;
unsigned long outstanding_reqs;
u32 capabilities;
int nutrs;
u32 mcq_capabilities;
int nutmrs;
u32 reserved_slot;
u32 ufs_version;
const struct ufs_hba_variant_ops *vops;
struct ufs_hba_variant_params *vps;
void *priv;
#ifdef CONFIG_SCSI_UFS_VARIABLE_SG_ENTRY_SIZE
size_t sg_entry_size;
#endif
unsigned int irq;
bool is_irq_enabled;
enum ufs_ref_clk_freq dev_ref_clk_freq;
unsigned int quirks; /* Deviations from standard UFSHCI spec. */
/* Device deviations from standard UFS device spec. */
unsigned int dev_quirks;
struct blk_mq_tag_set tmf_tag_set;
struct request_queue *tmf_queue;
struct request **tmf_rqs;
struct uic_command *active_uic_cmd;
struct mutex uic_cmd_mutex;
struct completion *uic_async_done;
enum ufshcd_state ufshcd_state;
u32 eh_flags;
u32 intr_mask;
u16 ee_ctrl_mask;
u16 ee_drv_mask;
u16 ee_usr_mask;
struct mutex ee_ctrl_mutex;
bool is_powered;
bool shutting_down;
struct semaphore host_sem;
/* Work Queues */
struct workqueue_struct *eh_wq;
struct work_struct eh_work;
struct work_struct eeh_work;
/* HBA Errors */
u32 errors;
u32 uic_error;
u32 saved_err;
u32 saved_uic_err;
struct ufs_stats ufs_stats;
bool force_reset;
bool force_pmc;
bool silence_err_logs;