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 <asm/byteorder.h> 12 #include <linux/types.h> 13 /* 14 * This file intended to be included by both kernel and user space 15 */ 16 17 #define UFS_CDB_SIZE 16 18 /* uic commands are 4DW long, per UFSHCI V2.1 paragraph 5.6.1 */ 19 #define UIC_CMD_SIZE (sizeof(__u32) * 4) 20 21 enum ufs_bsg_msg_code { 22 UPIU_TRANSACTION_UIC_CMD = 0x1F, 23 UPIU_TRANSACTION_ARPMB_CMD, 24 }; 25 26 /* UFS RPMB Request Message Types */ 27 enum ufs_rpmb_op_type { 28 UFS_RPMB_WRITE_KEY = 0x01, 29 UFS_RPMB_READ_CNT = 0x02, 30 UFS_RPMB_WRITE = 0x03, 31 UFS_RPMB_READ = 0x04, 32 UFS_RPMB_READ_RESP = 0x05, 33 UFS_RPMB_SEC_CONF_WRITE = 0x06, 34 UFS_RPMB_SEC_CONF_READ = 0x07, 35 UFS_RPMB_PURGE_ENABLE = 0x08, 36 UFS_RPMB_PURGE_STATUS_READ = 0x09, 37 }; 38 39 /** 40 * struct utp_upiu_header - UPIU header structure 41 * @dword_0: UPIU header DW-0 42 * @dword_1: UPIU header DW-1 43 * @dword_2: UPIU header DW-2 44 * 45 * @transaction_code: Type of request or response. See also enum 46 * upiu_request_transaction and enum upiu_response_transaction. 47 * @flags: UPIU flags. The meaning of individual flags depends on the 48 * transaction code. 49 * @lun: Logical unit number. 50 * @task_tag: Task tag. 51 * @iid: Initiator ID. 52 * @command_set_type: 0 for SCSI command set; 1 for UFS specific. 53 * @tm_function: Task management function in case of a task management request 54 * UPIU. 55 * @query_function: Query function in case of a query request UPIU. 56 * @response: 0 for success; 1 for failure. 57 * @status: SCSI status if this is the header of a response to a SCSI command. 58 * @ehs_length: EHS length in units of 32 bytes. 59 * @device_information: 60 * @data_segment_length: data segment length. 61 */ 62 struct utp_upiu_header { 63 union { 64 struct { 65 __be32 dword_0; 66 __be32 dword_1; 67 __be32 dword_2; 68 }; 69 struct { 70 __u8 transaction_code; 71 __u8 flags; 72 __u8 lun; 73 __u8 task_tag; 74 #if defined(__BIG_ENDIAN) 75 __u8 iid: 4; 76 __u8 command_set_type: 4; 77 #elif defined(__LITTLE_ENDIAN) 78 __u8 command_set_type: 4; 79 __u8 iid: 4; 80 #else 81 #error 82 #endif 83 union { 84 __u8 tm_function; 85 __u8 query_function; 86 }; 87 __u8 response; 88 __u8 status; 89 __u8 ehs_length; 90 __u8 device_information; 91 __be16 data_segment_length; 92 }; 93 }; 94 }; 95 96 /** 97 * struct utp_upiu_query - upiu request buffer structure for 98 * query request. 99 * @opcode: command to perform B-0 100 * @idn: a value that indicates the particular type of data B-1 101 * @index: Index to further identify data B-2 102 * @selector: Index to further identify data B-3 103 * @reserved_osf: spec reserved field B-4,5 104 * @length: number of descriptor bytes to read/write B-6,7 105 * @value: Attribute value to be written DW-5 106 * @reserved: spec reserved DW-6,7 107 */ 108 struct utp_upiu_query { 109 __u8 opcode; 110 __u8 idn; 111 __u8 index; 112 __u8 selector; 113 __be16 reserved_osf; 114 __be16 length; 115 __be32 value; 116 __be32 reserved[2]; 117 }; 118 119 /** 120 * struct utp_upiu_cmd - Command UPIU structure 121 * @data_transfer_len: Data Transfer Length DW-3 122 * @cdb: Command Descriptor Block CDB DW-4 to DW-7 123 */ 124 struct utp_upiu_cmd { 125 __be32 exp_data_transfer_len; 126 __u8 cdb[UFS_CDB_SIZE]; 127 }; 128 129 /** 130 * struct utp_upiu_req - general upiu request structure 131 * @header:UPIU header structure DW-0 to DW-2 132 * @sc: fields structure for scsi command DW-3 to DW-7 133 * @qr: fields structure for query request DW-3 to DW-7 134 * @uc: use utp_upiu_query to host the 4 dwords of uic command 135 */ 136 struct utp_upiu_req { 137 struct utp_upiu_header header; 138 union { 139 struct utp_upiu_cmd sc; 140 struct utp_upiu_query qr; 141 struct utp_upiu_query uc; 142 }; 143 }; 144 145 struct ufs_arpmb_meta { 146 __be16 req_resp_type; 147 __u8 nonce[16]; 148 __be32 write_counter; 149 __be16 addr_lun; 150 __be16 block_count; 151 __be16 result; 152 } __attribute__((__packed__)); 153 154 struct ufs_ehs { 155 __u8 length; 156 __u8 ehs_type; 157 __be16 ehssub_type; 158 struct ufs_arpmb_meta meta; 159 __u8 mac_key[32]; 160 } __attribute__((__packed__)); 161 162 /* request (CDB) structure of the sg_io_v4 */ 163 struct ufs_bsg_request { 164 __u32 msgcode; 165 struct utp_upiu_req upiu_req; 166 }; 167 168 /* response (request sense data) structure of the sg_io_v4 */ 169 struct ufs_bsg_reply { 170 /* 171 * The completion result. Result exists in two forms: 172 * if negative, it is an -Exxx system errno value. There will 173 * be no further reply information supplied. 174 * else, it's the 4-byte scsi error result, with driver, host, 175 * msg and status fields. The per-msgcode reply structure 176 * will contain valid data. 177 */ 178 int result; 179 180 /* If there was reply_payload, how much was received? */ 181 __u32 reply_payload_rcv_len; 182 183 struct utp_upiu_req upiu_rsp; 184 }; 185 186 struct ufs_rpmb_request { 187 struct ufs_bsg_request bsg_request; 188 struct ufs_ehs ehs_req; 189 }; 190 191 struct ufs_rpmb_reply { 192 struct ufs_bsg_reply bsg_reply; 193 struct ufs_ehs ehs_rsp; 194 }; 195 #endif /* UFS_BSG_H */ 196