srp.h (6652B)
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 */ 33 34#ifndef SCSI_SRP_H 35#define SCSI_SRP_H 36 37/* 38 * Structures and constants for the SCSI RDMA Protocol (SRP) as 39 * defined by the INCITS T10 committee. This file was written using 40 * draft Revision 16a of the SRP standard. 41 */ 42 43enum { 44 45 SRP_LOGIN_REQ = 0x00, 46 SRP_TSK_MGMT = 0x01, 47 SRP_CMD = 0x02, 48 SRP_I_LOGOUT = 0x03, 49 SRP_LOGIN_RSP = 0xc0, 50 SRP_RSP = 0xc1, 51 SRP_LOGIN_REJ = 0xc2, 52 SRP_T_LOGOUT = 0x80, 53 SRP_CRED_REQ = 0x81, 54 SRP_AER_REQ = 0x82, 55 SRP_CRED_RSP = 0x41, 56 SRP_AER_RSP = 0x42 57}; 58 59enum { 60 SRP_BUF_FORMAT_DIRECT = 1 << 1, 61 SRP_BUF_FORMAT_INDIRECT = 1 << 2 62}; 63 64enum { 65 SRP_NO_DATA_DESC = 0, 66 SRP_DATA_DESC_DIRECT = 1, 67 SRP_DATA_DESC_INDIRECT = 2 68}; 69 70enum { 71 SRP_TSK_ABORT_TASK = 0x01, 72 SRP_TSK_ABORT_TASK_SET = 0x02, 73 SRP_TSK_CLEAR_TASK_SET = 0x04, 74 SRP_TSK_LUN_RESET = 0x08, 75 SRP_TSK_CLEAR_ACA = 0x40 76}; 77 78enum srp_login_rej_reason { 79 SRP_LOGIN_REJ_UNABLE_ESTABLISH_CHANNEL = 0x00010000, 80 SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES = 0x00010001, 81 SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE = 0x00010002, 82 SRP_LOGIN_REJ_UNABLE_ASSOCIATE_CHANNEL = 0x00010003, 83 SRP_LOGIN_REJ_UNSUPPORTED_DESCRIPTOR_FMT = 0x00010004, 84 SRP_LOGIN_REJ_MULTI_CHANNEL_UNSUPPORTED = 0x00010005, 85 SRP_LOGIN_REJ_CHANNEL_LIMIT_REACHED = 0x00010006 86}; 87 88enum { 89 SRP_REV10_IB_IO_CLASS = 0xff00, 90 SRP_REV16A_IB_IO_CLASS = 0x0100 91}; 92 93enum { 94 SRP_TSK_MGMT_COMPLETE = 0x00, 95 SRP_TSK_MGMT_FIELDS_INVALID = 0x02, 96 SRP_TSK_MGMT_NOT_SUPPORTED = 0x04, 97 SRP_TSK_MGMT_FAILED = 0x05 98}; 99 100struct srp_direct_buf { 101 uint64_t va; 102 uint32_t key; 103 uint32_t len; 104}; 105 106/* 107 * We need the packed attribute because the SRP spec puts the list of 108 * descriptors at an offset of 20, which is not aligned to the size of 109 * struct srp_direct_buf. The whole structure must be packed to avoid 110 * having the 20-byte structure padded to 24 bytes on 64-bit architectures. 111 */ 112struct srp_indirect_buf { 113 struct srp_direct_buf table_desc; 114 uint32_t len; 115 struct srp_direct_buf desc_list[0]; 116} QEMU_PACKED; 117 118enum { 119 SRP_MULTICHAN_SINGLE = 0, 120 SRP_MULTICHAN_MULTI = 1 121}; 122 123struct srp_login_req { 124 uint8_t opcode; 125 uint8_t reserved1[7]; 126 uint64_t tag; 127 uint32_t req_it_iu_len; 128 uint8_t reserved2[4]; 129 uint16_t req_buf_fmt; 130 uint8_t req_flags; 131 uint8_t reserved3[5]; 132 uint8_t initiator_port_id[16]; 133 uint8_t target_port_id[16]; 134}; 135 136/* 137 * The SRP spec defines the size of the LOGIN_RSP structure to be 52 138 * bytes, so it needs to be packed to avoid having it padded to 56 139 * bytes on 64-bit architectures. 140 */ 141struct srp_login_rsp { 142 uint8_t opcode; 143 uint8_t reserved1[3]; 144 uint32_t req_lim_delta; 145 uint64_t tag; 146 uint32_t max_it_iu_len; 147 uint32_t max_ti_iu_len; 148 uint16_t buf_fmt; 149 uint8_t rsp_flags; 150 uint8_t reserved2[25]; 151} QEMU_PACKED; 152 153struct srp_login_rej { 154 uint8_t opcode; 155 uint8_t reserved1[3]; 156 uint32_t reason; 157 uint64_t tag; 158 uint8_t reserved2[8]; 159 uint16_t buf_fmt; 160 uint8_t reserved3[6]; 161}; 162 163struct srp_i_logout { 164 uint8_t opcode; 165 uint8_t reserved[7]; 166 uint64_t tag; 167}; 168 169struct srp_t_logout { 170 uint8_t opcode; 171 uint8_t sol_not; 172 uint8_t reserved[2]; 173 uint32_t reason; 174 uint64_t tag; 175}; 176 177/* 178 * We need the packed attribute because the SRP spec only aligns the 179 * 8-byte LUN field to 4 bytes. 180 */ 181struct srp_tsk_mgmt { 182 uint8_t opcode; 183 uint8_t sol_not; 184 uint8_t reserved1[6]; 185 uint64_t tag; 186 uint8_t reserved2[4]; 187 uint64_t lun; 188 uint8_t reserved3[2]; 189 uint8_t tsk_mgmt_func; 190 uint8_t reserved4; 191 uint64_t task_tag; 192 uint8_t reserved5[8]; 193} QEMU_PACKED; 194 195/* 196 * We need the packed attribute because the SRP spec only aligns the 197 * 8-byte LUN field to 4 bytes. 198 */ 199struct srp_cmd { 200 uint8_t opcode; 201 uint8_t sol_not; 202 uint8_t reserved1[3]; 203 uint8_t buf_fmt; 204 uint8_t data_out_desc_cnt; 205 uint8_t data_in_desc_cnt; 206 uint64_t tag; 207 uint8_t reserved2[4]; 208 uint64_t lun; 209 uint8_t reserved3; 210 uint8_t task_attr; 211 uint8_t reserved4; 212 uint8_t add_cdb_len; 213 uint8_t cdb[16]; 214 uint8_t add_data[0]; 215} QEMU_PACKED; 216 217enum { 218 SRP_RSP_FLAG_RSPVALID = 1 << 0, 219 SRP_RSP_FLAG_SNSVALID = 1 << 1, 220 SRP_RSP_FLAG_DOOVER = 1 << 2, 221 SRP_RSP_FLAG_DOUNDER = 1 << 3, 222 SRP_RSP_FLAG_DIOVER = 1 << 4, 223 SRP_RSP_FLAG_DIUNDER = 1 << 5 224}; 225 226/* 227 * The SRP spec defines the size of the RSP structure to be 36 bytes, 228 * so it needs to be packed to avoid having it padded to 40 bytes on 229 * 64-bit architectures. 230 */ 231struct srp_rsp { 232 uint8_t opcode; 233 uint8_t sol_not; 234 uint8_t reserved1[2]; 235 uint32_t req_lim_delta; 236 uint64_t tag; 237 uint8_t reserved2[2]; 238 uint8_t flags; 239 uint8_t status; 240 uint32_t data_out_res_cnt; 241 uint32_t data_in_res_cnt; 242 uint32_t sense_data_len; 243 uint32_t resp_data_len; 244 uint8_t data[0]; 245} QEMU_PACKED; 246 247#endif /* SCSI_SRP_H */