1/* 2 * Copyright (c) 2005 Cisco Systems. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 * 32 * $Id$ 33 */ 34 35#ifndef SCSI_SRP_H 36#define SCSI_SRP_H 37 38/* 39 * Structures and constants for the SCSI RDMA Protocol (SRP) as 40 * defined by the INCITS T10 committee. This file was written using 41 * draft Revision 16a of the SRP standard. 42 */ 43 44#include <linux/types.h> 45#include <scsi/scsi.h> 46 47enum { 48 SRP_LOGIN_REQ = 0x00, 49 SRP_TSK_MGMT = 0x01, 50 SRP_CMD = 0x02, 51 SRP_I_LOGOUT = 0x03, 52 SRP_LOGIN_RSP = 0xc0, 53 SRP_RSP = 0xc1, 54 SRP_LOGIN_REJ = 0xc2, 55 SRP_T_LOGOUT = 0x80, 56 SRP_CRED_REQ = 0x81, 57 SRP_AER_REQ = 0x82, 58 SRP_CRED_RSP = 0x41, 59 SRP_AER_RSP = 0x42 60}; 61 62enum { 63 SRP_BUF_FORMAT_DIRECT = 1 << 1, 64 SRP_BUF_FORMAT_INDIRECT = 1 << 2 65}; 66 67enum { 68 SRP_NO_DATA_DESC = 0, 69 SRP_DATA_DESC_DIRECT = 1, 70 SRP_DATA_DESC_INDIRECT = 2 71}; 72 73enum { 74 SRP_TSK_ABORT_TASK = 0x01, 75 SRP_TSK_ABORT_TASK_SET = 0x02, 76 SRP_TSK_CLEAR_TASK_SET = 0x04, 77 SRP_TSK_LUN_RESET = 0x08, 78 SRP_TSK_CLEAR_ACA = 0x40 79}; 80 81enum srp_login_rej_reason { 82 SRP_LOGIN_REJ_UNABLE_ESTABLISH_CHANNEL = 0x00010000, 83 SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES = 0x00010001, 84 SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE = 0x00010002, 85 SRP_LOGIN_REJ_UNABLE_ASSOCIATE_CHANNEL = 0x00010003, 86 SRP_LOGIN_REJ_UNSUPPORTED_DESCRIPTOR_FMT = 0x00010004, 87 SRP_LOGIN_REJ_MULTI_CHANNEL_UNSUPPORTED = 0x00010005, 88 SRP_LOGIN_REJ_CHANNEL_LIMIT_REACHED = 0x00010006 89}; 90 91enum { 92 SRP_REV10_IB_IO_CLASS = 0xff00, 93 SRP_REV16A_IB_IO_CLASS = 0x0100 94}; 95 96struct srp_direct_buf { 97 __be64 va; 98 __be32 key; 99 __be32 len; 100}; 101 102/* 103 * We need the packed attribute because the SRP spec puts the list of 104 * descriptors at an offset of 20, which is not aligned to the size of 105 * struct srp_direct_buf. The whole structure must be packed to avoid 106 * having the 20-byte structure padded to 24 bytes on 64-bit architectures. 107 */ 108struct srp_indirect_buf { 109 struct srp_direct_buf table_desc; 110 __be32 len; 111 struct srp_direct_buf desc_list[0]; 112} __attribute__((packed)); 113 114enum { 115 SRP_MULTICHAN_SINGLE = 0, 116 SRP_MULTICHAN_MULTI = 1 117}; 118 119struct srp_login_req { 120 u8 opcode; 121 u8 reserved1[7]; 122 u64 tag; 123 __be32 req_it_iu_len; 124 u8 reserved2[4]; 125 __be16 req_buf_fmt; 126 u8 req_flags; 127 u8 reserved3[5]; 128 u8 initiator_port_id[16]; 129 u8 target_port_id[16]; 130}; 131 132/* 133 * The SRP spec defines the size of the LOGIN_RSP structure to be 52 134 * bytes, so it needs to be packed to avoid having it padded to 56 135 * bytes on 64-bit architectures. 136 */ 137struct srp_login_rsp { 138 u8 opcode; 139 u8 reserved1[3]; 140 __be32 req_lim_delta; 141 u64 tag; 142 __be32 max_it_iu_len; 143 __be32 max_ti_iu_len; 144 __be16 buf_fmt; 145 u8 rsp_flags; 146 u8 reserved2[25]; 147} __attribute__((packed)); 148 149struct srp_login_rej { 150 u8 opcode; 151 u8 reserved1[3]; 152 __be32 reason; 153 u64 tag; 154 u8 reserved2[8]; 155 __be16 buf_fmt; 156 u8 reserved3[6]; 157}; 158 159struct srp_i_logout { 160 u8 opcode; 161 u8 reserved[7]; 162 u64 tag; 163}; 164 165struct srp_t_logout { 166 u8 opcode; 167 u8 sol_not; 168 u8 reserved[2]; 169 __be32 reason; 170 u64 tag; 171}; 172 173/* 174 * We need the packed attribute because the SRP spec only aligns the 175 * 8-byte LUN field to 4 bytes. 176 */ 177struct srp_tsk_mgmt { 178 u8 opcode; 179 u8 sol_not; 180 u8 reserved1[6]; 181 u64 tag; 182 u8 reserved2[4]; 183 struct scsi_lun lun; 184 u8 reserved3[2]; 185 u8 tsk_mgmt_func; 186 u8 reserved4; 187 u64 task_tag; 188 u8 reserved5[8]; 189}; 190 191/* 192 * We need the packed attribute because the SRP spec only aligns the 193 * 8-byte LUN field to 4 bytes. 194 */ 195struct srp_cmd { 196 u8 opcode; 197 u8 sol_not; 198 u8 reserved1[3]; 199 u8 buf_fmt; 200 u8 data_out_desc_cnt; 201 u8 data_in_desc_cnt; 202 u64 tag; 203 u8 reserved2[4]; 204 struct scsi_lun lun; 205 u8 reserved3; 206 u8 task_attr; 207 u8 reserved4; 208 u8 add_cdb_len; 209 u8 cdb[16]; 210 u8 add_data[0]; 211}; 212 213enum { 214 SRP_RSP_FLAG_RSPVALID = 1 << 0, 215 SRP_RSP_FLAG_SNSVALID = 1 << 1, 216 SRP_RSP_FLAG_DOOVER = 1 << 2, 217 SRP_RSP_FLAG_DOUNDER = 1 << 3, 218 SRP_RSP_FLAG_DIOVER = 1 << 4, 219 SRP_RSP_FLAG_DIUNDER = 1 << 5 220}; 221 222/* 223 * The SRP spec defines the size of the RSP structure to be 36 bytes, 224 * so it needs to be packed to avoid having it padded to 40 bytes on 225 * 64-bit architectures. 226 */ 227struct srp_rsp { 228 u8 opcode; 229 u8 sol_not; 230 u8 reserved1[2]; 231 __be32 req_lim_delta; 232 u64 tag; 233 u8 reserved2[2]; 234 u8 flags; 235 u8 status; 236 __be32 data_out_res_cnt; 237 __be32 data_in_res_cnt; 238 __be32 sense_data_len; 239 __be32 resp_data_len; 240 u8 data[0]; 241} __attribute__((packed)); 242 243struct srp_cred_req { 244 u8 opcode; 245 u8 sol_not; 246 u8 reserved[2]; 247 __be32 req_lim_delta; 248 u64 tag; 249}; 250 251struct srp_cred_rsp { 252 u8 opcode; 253 u8 reserved[7]; 254 u64 tag; 255}; 256 257/* 258 * The SRP spec defines the fixed portion of the AER_REQ structure to be 259 * 36 bytes, so it needs to be packed to avoid having it padded to 40 bytes 260 * on 64-bit architectures. 261 */ 262struct srp_aer_req { 263 u8 opcode; 264 u8 sol_not; 265 u8 reserved[2]; 266 __be32 req_lim_delta; 267 u64 tag; 268 u32 reserved2; 269 struct scsi_lun lun; 270 __be32 sense_data_len; 271 u32 reserved3; 272 u8 sense_data[0]; 273} __attribute__((packed)); 274 275struct srp_aer_rsp { 276 u8 opcode; 277 u8 reserved[7]; 278 u64 tag; 279}; 280 281#endif /* SCSI_SRP_H */ 282