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105 lines
2.7 KiB
105 lines
2.7 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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/* |
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* UFS Transport SGIO v4 BSG Message Support |
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* |
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* Copyright (C) 2011-2013 Samsung India Software Operations |
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* Copyright (C) 2018 Western Digital Corporation |
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*/ |
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#ifndef SCSI_BSG_UFS_H |
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#define SCSI_BSG_UFS_H |
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#include <linux/types.h> |
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/* |
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* This file intended to be included by both kernel and user space |
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*/ |
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#define UFS_CDB_SIZE 16 |
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#define UPIU_TRANSACTION_UIC_CMD 0x1F |
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/* uic commands are 4DW long, per UFSHCI V2.1 paragraph 5.6.1 */ |
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#define UIC_CMD_SIZE (sizeof(__u32) * 4) |
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/** |
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* struct utp_upiu_header - UPIU header structure |
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* @dword_0: UPIU header DW-0 |
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* @dword_1: UPIU header DW-1 |
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* @dword_2: UPIU header DW-2 |
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*/ |
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struct utp_upiu_header { |
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__be32 dword_0; |
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__be32 dword_1; |
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__be32 dword_2; |
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}; |
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/** |
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* struct utp_upiu_query - upiu request buffer structure for |
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* query request. |
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* @opcode: command to perform B-0 |
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* @idn: a value that indicates the particular type of data B-1 |
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* @index: Index to further identify data B-2 |
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* @selector: Index to further identify data B-3 |
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* @reserved_osf: spec reserved field B-4,5 |
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* @length: number of descriptor bytes to read/write B-6,7 |
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* @value: Attribute value to be written DW-5 |
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* @reserved: spec reserved DW-6,7 |
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*/ |
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struct utp_upiu_query { |
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__u8 opcode; |
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__u8 idn; |
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__u8 index; |
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__u8 selector; |
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__be16 reserved_osf; |
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__be16 length; |
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__be32 value; |
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__be32 reserved[2]; |
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}; |
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/** |
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* struct utp_upiu_cmd - Command UPIU structure |
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* @data_transfer_len: Data Transfer Length DW-3 |
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* @cdb: Command Descriptor Block CDB DW-4 to DW-7 |
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*/ |
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struct utp_upiu_cmd { |
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__be32 exp_data_transfer_len; |
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__u8 cdb[UFS_CDB_SIZE]; |
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}; |
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/** |
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* struct utp_upiu_req - general upiu request structure |
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* @header:UPIU header structure DW-0 to DW-2 |
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* @sc: fields structure for scsi command DW-3 to DW-7 |
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* @qr: fields structure for query request DW-3 to DW-7 |
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* @uc: use utp_upiu_query to host the 4 dwords of uic command |
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*/ |
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struct utp_upiu_req { |
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struct utp_upiu_header header; |
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union { |
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struct utp_upiu_cmd sc; |
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struct utp_upiu_query qr; |
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struct utp_upiu_query uc; |
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}; |
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}; |
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/* request (CDB) structure of the sg_io_v4 */ |
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struct ufs_bsg_request { |
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__u32 msgcode; |
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struct utp_upiu_req upiu_req; |
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}; |
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/* response (request sense data) structure of the sg_io_v4 */ |
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struct ufs_bsg_reply { |
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/* |
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* The completion result. Result exists in two forms: |
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* if negative, it is an -Exxx system errno value. There will |
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* be no further reply information supplied. |
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* else, it's the 4-byte scsi error result, with driver, host, |
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* msg and status fields. The per-msgcode reply structure |
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* will contain valid data. |
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*/ |
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__u32 result; |
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/* If there was reply_payload, how much was received? */ |
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__u32 reply_payload_rcv_len; |
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struct utp_upiu_req upiu_rsp; |
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}; |
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#endif /* UFS_BSG_H */
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