148 lines
3.2 KiB
C
148 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2017-2018 Samsung Electronics Co., Ltd.
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*/
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#ifndef _UFSTW_H_
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#define _UFSTW_H_
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#include <linux/interrupt.h>
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#include <linux/sysfs.h>
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#include <linux/blktrace_api.h>
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#include <linux/blkdev.h>
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#include <scsi/scsi_cmnd.h>
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#include "../../../block/blk.h"
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#define UFSTW_VER 0x0101
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#define UFSTW_DD_VER 0x0103
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#define UFSTW_FLUSH_CHECK_PERIOD_MS 1000
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#define UFSTW_FLUSH_WORKER_TH_MIN 3
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#define UFSTW_FLUSH_WORKER_TH_MAX 8
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#define UFSTW_LIFETIME_SECT 2097152 /* 1GB */
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#define UFSTW_MAX_LIFETIME_VALUE 0x0B
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/* TW 1.0.1[31], TW 1.1.0[7] */
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#define MASK_UFSTW_LIFETIME_NOT_GUARANTEE 0x80000080
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/*
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* UFSTW DEBUG
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*/
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#define TW_DEBUG(ufsf, msg, args...) \
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do { if (ufsf->tw_debug) \
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printk(KERN_ERR "%s:%d " msg "\n", \
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__func__, __LINE__, ##args); \
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} while (0)
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enum {
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FLUSH_IDLE = 0,
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FLUSH_RUN,
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FLUSH_COMPLETE,
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FLUSH_FAIL,
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FLUSH_NUM_OF_STATE,
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};
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enum UFSTW_STATE {
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TW_NOT_SUPPORTED = -1,
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TW_NEED_INIT = 0,
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TW_PRESENT = 1,
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TW_FAILED = -2,
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TW_RESET = -3,
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};
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enum {
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TW_MODE_DISABLED,
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TW_MODE_MANUAL,
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TW_MODE_FS,
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TW_MODE_NUM
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};
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enum {
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TW_EE_MODE_DISABLE,
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TW_EE_MODE_AUTO,
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TW_EE_MODE_NUM
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};
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enum {
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TW_FLAG_ENABLE_NONE = 0,
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TW_FLAG_ENABLE_CLEAR = 1,
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TW_FLAG_ENABLE_SET = 2,
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};
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struct ufstw_dev_info {
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bool tw_device;
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/* from Device Descriptor */
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u16 tw_ver;
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u8 tw_buf_no_reduct;
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u8 tw_buf_type;
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/* from Geometry Descriptor */
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u8 tw_number_lu;
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};
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struct ufstw_lu {
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struct ufsf_feature *ufsf;
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int lun;
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/* Flags */
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bool tw_flush_enable;
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bool tw_flush_during_hibern_enter;
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struct mutex flush_lock;
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/* lifetiem estimated */
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unsigned int tw_lifetime_est;
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spinlock_t lifetime_lock;
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u32 stat_write_sec;
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struct work_struct tw_lifetime_work;
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/* Attributes */
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unsigned int tw_flush_status;
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unsigned int tw_available_buffer_size;
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unsigned int tw_current_tw_buffer_size;
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/* mode manual/fs */
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atomic_t tw_mode;
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bool tw_enable;
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atomic_t active_cnt;
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struct mutex mode_lock;
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/* Worker */
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struct delayed_work tw_flush_work;
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struct delayed_work tw_flush_h8_work;
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unsigned long next_q;
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unsigned int flush_th_max;
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unsigned int flush_th_min;
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/* for sysfs */
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struct kobject kobj;
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struct mutex sysfs_lock;
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struct ufstw_sysfs_entry *sysfs_entries;
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};
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struct ufstw_sysfs_entry {
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struct attribute attr;
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ssize_t (*show)(struct ufstw_lu *tw, char *buf);
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ssize_t (*store)(struct ufstw_lu *tw, const char *buf, size_t count);
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};
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struct ufshcd_lrb;
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void ufstw_get_dev_info(struct ufstw_dev_info *tw_dev_info, u8 *desc_buf);
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void ufstw_get_geo_info(struct ufstw_dev_info *tw_dev_info, u8 *geo_buf);
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int ufstw_get_lu_info(struct ufsf_feature *ufsf, unsigned int lun, u8 *lu_buf);
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void ufstw_init(struct ufsf_feature *ufsf);
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void ufstw_prep_fn(struct ufsf_feature *ufsf, struct ufshcd_lrb *lrbp);
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void ufstw_init_work_fn(struct work_struct *work);
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void ufstw_ee_handler(struct ufsf_feature *ufsf);
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void ufstw_error_handler(struct ufsf_feature *ufsf);
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void ufstw_reset_work_fn(struct work_struct *work);
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void ufstw_suspend(struct ufsf_feature *ufsf);
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void ufstw_resume(struct ufsf_feature *ufsf);
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void ufstw_release(struct kref *kref);
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bool ufstw_need_flush(struct ufsf_feature *ufsf);
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#endif /* End of Header */
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