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1/*2 * Copyright (c) 2005 Cisco Systems. All rights reserved.3 *4 * This software is available to you under a choice of one of two5 * licenses. You may choose to be licensed under the terms of the GNU6 * General Public License (GPL) Version 2, available from the file7 * COPYING in the main directory of this source tree, or the8 * OpenIB.org BSD license below:9 *10 * Redistribution and use in source and binary forms, with or11 * without modification, are permitted provided that the following12 * conditions are met:13 *14 * - Redistributions of source code must retain the above15 * copyright notice, this list of conditions and the following16 * disclaimer.17 *18 * - Redistributions in binary form must reproduce the above19 * copyright notice, this list of conditions and the following20 * disclaimer in the documentation and/or other materials21 * 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 OF25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE30 * SOFTWARE.31 *32 * $Id$33 */34 35#ifndef SCSI_SRP_H36#define SCSI_SRP_H37 38/*39 * Structures and constants for the SCSI RDMA Protocol (SRP) as40 * defined by the INCITS T10 committee. This file was written using41 * 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 = 0x4260};61 62enum {63 SRP_BUF_FORMAT_DIRECT = 1 << 1,64 SRP_BUF_FORMAT_INDIRECT = 1 << 265};66 67enum {68 SRP_NO_DATA_DESC = 0,69 SRP_DATA_DESC_DIRECT = 1,70 SRP_DATA_DESC_INDIRECT = 2,71 SRP_DATA_DESC_IMM = 3, /* new in SRP2 */72};73 74enum {75 SRP_TSK_ABORT_TASK = 0x01,76 SRP_TSK_ABORT_TASK_SET = 0x02,77 SRP_TSK_CLEAR_TASK_SET = 0x04,78 SRP_TSK_LUN_RESET = 0x08,79 SRP_TSK_CLEAR_ACA = 0x4080};81 82enum srp_login_rej_reason {83 SRP_LOGIN_REJ_UNABLE_ESTABLISH_CHANNEL = 0x00010000,84 SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES = 0x00010001,85 SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE = 0x00010002,86 SRP_LOGIN_REJ_UNABLE_ASSOCIATE_CHANNEL = 0x00010003,87 SRP_LOGIN_REJ_UNSUPPORTED_DESCRIPTOR_FMT = 0x00010004,88 SRP_LOGIN_REJ_MULTI_CHANNEL_UNSUPPORTED = 0x00010005,89 SRP_LOGIN_REJ_CHANNEL_LIMIT_REACHED = 0x0001000690};91 92enum {93 SRP_REV10_IB_IO_CLASS = 0xff00,94 SRP_REV16A_IB_IO_CLASS = 0x010095};96 97struct srp_direct_buf {98 __be64 va;99 __be32 key;100 __be32 len;101};102 103/*104 * We need the packed attribute because the SRP spec puts the list of105 * descriptors at an offset of 20, which is not aligned to the size of106 * struct srp_direct_buf. The whole structure must be packed to avoid107 * having the 20-byte structure padded to 24 bytes on 64-bit architectures.108 */109struct srp_indirect_buf {110 struct srp_direct_buf table_desc __packed __aligned(4);111 __be32 len;112 struct srp_direct_buf desc_list[] __packed __aligned(4);113};114 115/* Immediate data buffer descriptor as defined in SRP2. */116struct srp_imm_buf {117 __be32 len;118};119 120/* srp_login_req.flags */121enum {122 SRP_MULTICHAN_SINGLE = 0,123 SRP_MULTICHAN_MULTI = 1,124 SRP_IMMED_REQUESTED = 0x80, /* new in SRP2 */125};126 127struct srp_login_req {128 u8 opcode;129 u8 reserved1[7];130 u64 tag;131 __be32 req_it_iu_len;132 u8 reserved2[4];133 __be16 req_buf_fmt;134 u8 req_flags;135 u8 reserved3[1];136 __be16 imm_data_offset; /* new in SRP2 */137 u8 reserved4[2];138 u8 initiator_port_id[16];139 u8 target_port_id[16];140};141 142/**143 * struct srp_login_req_rdma - RDMA/CM login parameters.144 *145 * RDMA/CM over InfiniBand can only carry 92 - 36 = 56 bytes of private146 * data. The %srp_login_req_rdma structure contains the same information as147 * %srp_login_req but with the reserved data removed.148 */149struct srp_login_req_rdma {150 u64 tag;151 __be16 req_buf_fmt;152 u8 req_flags;153 u8 opcode;154 __be32 req_it_iu_len;155 u8 initiator_port_id[16];156 u8 target_port_id[16];157 __be16 imm_data_offset;158 u8 reserved[6];159};160 161/* srp_login_rsp.rsp_flags */162enum {163 SRP_LOGIN_RSP_MULTICHAN_NO_CHAN = 0x0,164 SRP_LOGIN_RSP_MULTICHAN_TERMINATED = 0x1,165 SRP_LOGIN_RSP_MULTICHAN_MAINTAINED = 0x2,166 SRP_LOGIN_RSP_IMMED_SUPP = 0x80, /* new in SRP2 */167};168 169/*170 * The SRP spec defines the size of the LOGIN_RSP structure to be 52171 * bytes, so it needs to be packed to avoid having it padded to 56172 * bytes on 64-bit architectures.173 */174struct srp_login_rsp {175 u8 opcode;176 u8 reserved1[3];177 __be32 req_lim_delta;178 u64 tag __packed __aligned(4);179 __be32 max_it_iu_len;180 __be32 max_ti_iu_len;181 __be16 buf_fmt;182 u8 rsp_flags;183 u8 reserved2[25];184};185 186struct srp_login_rej {187 u8 opcode;188 u8 reserved1[3];189 __be32 reason;190 u64 tag;191 u8 reserved2[8];192 __be16 buf_fmt;193 u8 reserved3[6];194};195 196struct srp_i_logout {197 u8 opcode;198 u8 reserved[7];199 u64 tag;200};201 202struct srp_t_logout {203 u8 opcode;204 u8 sol_not;205 u8 reserved[2];206 __be32 reason;207 u64 tag;208};209 210struct srp_tsk_mgmt {211 u8 opcode;212 u8 sol_not;213 u8 reserved1[6];214 u64 tag;215 u8 reserved2[4];216 struct scsi_lun lun;217 u8 reserved3[2];218 u8 tsk_mgmt_func;219 u8 reserved4;220 u64 task_tag;221 u8 reserved5[8];222};223 224struct srp_cmd {225 u8 opcode;226 u8 sol_not;227 u8 reserved1[3];228 u8 buf_fmt;229 u8 data_out_desc_cnt;230 u8 data_in_desc_cnt;231 u64 tag;232 u8 reserved2[4];233 struct scsi_lun lun;234 u8 reserved3;235 u8 task_attr;236 u8 reserved4;237 u8 add_cdb_len;238 u8 cdb[16];239 u8 add_data[];240};241 242enum {243 SRP_RSP_FLAG_RSPVALID = 1 << 0,244 SRP_RSP_FLAG_SNSVALID = 1 << 1,245 SRP_RSP_FLAG_DOOVER = 1 << 2,246 SRP_RSP_FLAG_DOUNDER = 1 << 3,247 SRP_RSP_FLAG_DIOVER = 1 << 4,248 SRP_RSP_FLAG_DIUNDER = 1 << 5249};250 251/*252 * The SRP spec defines the size of the RSP structure to be 36 bytes,253 * so it needs to be packed to avoid having it padded to 40 bytes on254 * 64-bit architectures.255 */256struct srp_rsp {257 u8 opcode;258 u8 sol_not;259 u8 reserved1[2];260 __be32 req_lim_delta;261 u64 tag __packed __aligned(4);262 u8 reserved2[2];263 u8 flags;264 u8 status;265 __be32 data_out_res_cnt;266 __be32 data_in_res_cnt;267 __be32 sense_data_len;268 __be32 resp_data_len;269 u8 data[];270};271 272struct srp_cred_req {273 u8 opcode;274 u8 sol_not;275 u8 reserved[2];276 __be32 req_lim_delta;277 u64 tag;278};279 280struct srp_cred_rsp {281 u8 opcode;282 u8 reserved[7];283 u64 tag;284};285 286/*287 * The SRP spec defines the fixed portion of the AER_REQ structure to be288 * 36 bytes, so it needs to be packed to avoid having it padded to 40 bytes289 * on 64-bit architectures.290 */291struct srp_aer_req {292 u8 opcode;293 u8 sol_not;294 u8 reserved[2];295 __be32 req_lim_delta;296 u64 tag __packed __aligned(4);297 u32 reserved2;298 struct scsi_lun lun;299 __be32 sense_data_len;300 u32 reserved3;301 u8 sense_data[];302};303 304struct srp_aer_rsp {305 u8 opcode;306 u8 reserved[7];307 u64 tag;308};309 310#endif /* SCSI_SRP_H */311