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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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cf949bbe22
Added 'WITH Linux-syscall-note' exception which is the officially assigned
exception identifier for the kernel syscall exception. This exception
makes it possible to include GPL headers into non GPL code without
confusing license compliance tools.
Fixes: a851b2bd36 (scsi: uapi: ufs: Make utp_upiu_req visible to user space)
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Pedro Sousa <pedrom.sousa@synopsys.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
/* 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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*/
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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 tr;
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/* use utp_upiu_query to host the 4 dwords of uic command */
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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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