cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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scsi_bsg_ufs.h (2766B)

      1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
      2/*
      3 * UFS Transport SGIO v4 BSG Message Support
      4 *
      5 * Copyright (C) 2011-2013 Samsung India Software Operations
      6 * Copyright (C) 2018 Western Digital Corporation
      7 */
      8#ifndef SCSI_BSG_UFS_H
      9#define SCSI_BSG_UFS_H
     10
     11#include <linux/types.h>
     12/*
     13 * This file intended to be included by both kernel and user space
     14 */
     15
     16#define UFS_CDB_SIZE	16
     17#define UPIU_TRANSACTION_UIC_CMD 0x1F
     18/* uic commands are 4DW long, per UFSHCI V2.1 paragraph 5.6.1 */
     19#define UIC_CMD_SIZE (sizeof(__u32) * 4)
     20
     21/**
     22 * struct utp_upiu_header - UPIU header structure
     23 * @dword_0: UPIU header DW-0
     24 * @dword_1: UPIU header DW-1
     25 * @dword_2: UPIU header DW-2
     26 */
     27struct utp_upiu_header {
     28	__be32 dword_0;
     29	__be32 dword_1;
     30	__be32 dword_2;
     31};
     32
     33/**
     34 * struct utp_upiu_query - upiu request buffer structure for
     35 * query request.
     36 * @opcode: command to perform B-0
     37 * @idn: a value that indicates the particular type of data B-1
     38 * @index: Index to further identify data B-2
     39 * @selector: Index to further identify data B-3
     40 * @reserved_osf: spec reserved field B-4,5
     41 * @length: number of descriptor bytes to read/write B-6,7
     42 * @value: Attribute value to be written DW-5
     43 * @reserved: spec reserved DW-6,7
     44 */
     45struct utp_upiu_query {
     46	__u8 opcode;
     47	__u8 idn;
     48	__u8 index;
     49	__u8 selector;
     50	__be16 reserved_osf;
     51	__be16 length;
     52	__be32 value;
     53	__be32 reserved[2];
     54};
     55
     56/**
     57 * struct utp_upiu_cmd - Command UPIU structure
     58 * @data_transfer_len: Data Transfer Length DW-3
     59 * @cdb: Command Descriptor Block CDB DW-4 to DW-7
     60 */
     61struct utp_upiu_cmd {
     62	__be32 exp_data_transfer_len;
     63	__u8 cdb[UFS_CDB_SIZE];
     64};
     65
     66/**
     67 * struct utp_upiu_req - general upiu request structure
     68 * @header:UPIU header structure DW-0 to DW-2
     69 * @sc: fields structure for scsi command DW-3 to DW-7
     70 * @qr: fields structure for query request DW-3 to DW-7
     71 * @uc: use utp_upiu_query to host the 4 dwords of uic command
     72 */
     73struct utp_upiu_req {
     74	struct utp_upiu_header header;
     75	union {
     76		struct utp_upiu_cmd		sc;
     77		struct utp_upiu_query		qr;
     78		struct utp_upiu_query		uc;
     79	};
     80};
     81
     82/* request (CDB) structure of the sg_io_v4 */
     83struct ufs_bsg_request {
     84	__u32 msgcode;
     85	struct utp_upiu_req upiu_req;
     86};
     87
     88/* response (request sense data) structure of the sg_io_v4 */
     89struct ufs_bsg_reply {
     90	/*
     91	 * The completion result. Result exists in two forms:
     92	 * if negative, it is an -Exxx system errno value. There will
     93	 * be no further reply information supplied.
     94	 * else, it's the 4-byte scsi error result, with driver, host,
     95	 * msg and status fields. The per-msgcode reply structure
     96	 * will contain valid data.
     97	 */
     98	__u32 result;
     99
    100	/* If there was reply_payload, how much was received? */
    101	__u32 reply_payload_rcv_len;
    102
    103	struct utp_upiu_req upiu_rsp;
    104};
    105#endif /* UFS_BSG_H */