131 lines
3.8 KiB
C
131 lines
3.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Universal Flash Storage tw Write
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*
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* Copyright (C) 2017-2018 Samsung Electronics Co., Ltd.
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*
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* Authors:
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* Yongmyung Lee <ymhungry.lee@samsung.com>
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* Jinyoung Choi <j-young.choi@samsung.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* See the COPYING file in the top-level directory or visit
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* <http://www.gnu.org/licenses/gpl-2.0.html>
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* This program is provided "AS IS" and "WITH ALL FAULTS" and
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* without warranty of any kind. You are solely responsible for
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* determining the appropriateness of using and distributing
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* the program and assume all risks associated with your exercise
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* of rights with respect to the program, including but not limited
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* to infringement of third party rights, the risks and costs of
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* program errors, damage to or loss of data, programs or equipment,
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* and unavailability or interruption of operations. Under no
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* circumstances will the contributor of this Program be liable for
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* any damages of any kind arising from your use or distribution of
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* this program.
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*
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* The Linux Foundation chooses to take subject only to the GPLv2
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* license terms, and distributes only under these terms.
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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 0x0110
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#define UFSTW_DD_VER 0x010300
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#define UFSTW_DD_VER_POST ""
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#define UFSTW_LIFETIME_SECT 2097152 /* 1GB */
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#define UFSTW_MAX_LIFETIME_VALUE 0x0B
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#define MASK_UFSTW_LIFETIME_NOT_GUARANTEE 0x80
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#define UFS_FEATURE_SUPPORT_TW_BIT 0x100
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#define TW_LU_SHARED -1
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enum UFSTW_STATE {
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TW_NEED_INIT = 0,
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TW_PRESENT = 1,
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TW_SUSPEND = 2,
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TW_RESET = -3,
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TW_FAILED = -4,
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TW_PREPARE_RESET = -5,
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};
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enum {
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TW_BUF_TYPE_LU = 0,
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TW_BUF_TYPE_SHARED,
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};
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struct ufstw_dev_info {
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/* from Device Descriptor */
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u16 tw_ver;
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u32 tw_shared_buf_alloc_units;
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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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bool tw_enable;
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bool flush_enable;
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bool flush_during_hibern_enter;
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unsigned int flush_status;
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unsigned int available_buffer_size;
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unsigned int curr_buffer_size;
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unsigned int 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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/* 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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int ufstw_get_state(struct ufsf_feature *ufsf);
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void ufstw_set_state(struct ufsf_feature *ufsf, int state);
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void ufstw_get_dev_info(struct ufsf_feature *ufsf, u8 *desc_buf);
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void ufstw_get_geo_info(struct ufsf_feature *ufsf, u8 *geo_buf);
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void ufstw_alloc_lu(struct ufsf_feature *ufsf, int lun, u8 *lu_buf);
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void ufstw_prep_fn(struct ufsf_feature *ufsf, struct ufshcd_lrb *lrbp);
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void ufstw_init(struct ufsf_feature *ufsf);
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void ufstw_remove(struct ufsf_feature *ufsf);
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void ufstw_suspend(struct ufsf_feature *ufsf);
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void ufstw_resume(struct ufsf_feature *ufsf, bool is_link_off);
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void ufstw_reset_host(struct ufsf_feature *ufsf);
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void ufstw_reset(struct ufsf_feature *ufsf);
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#endif /* End of Header */
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