path: root/include/ufs/ufshcd.h

/* 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 <santosh.sy@samsung.com>
 *	Vinayak Holikatti <h.vinayak@samsung.com>
 */

#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/pm_runtime.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,
};

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_ab