2 * Copyright (c) 2005 Cisco Systems. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
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.
44 #include <linux/types.h>
45 #include <scsi/scsi.h>
63 SRP_BUF_FORMAT_DIRECT = 1 << 1,
64 SRP_BUF_FORMAT_INDIRECT = 1 << 2
69 SRP_DATA_DESC_DIRECT = 1,
70 SRP_DATA_DESC_INDIRECT = 2,
71 SRP_DATA_DESC_IMM = 3, /* new in SRP2 */
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 = 0x40
82 enum 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 = 0x00010006
93 SRP_REV10_IB_IO_CLASS = 0xff00,
94 SRP_REV16A_IB_IO_CLASS = 0x0100
97 struct srp_direct_buf {
104 * We need the packed attribute because the SRP spec puts the list of
105 * descriptors at an offset of 20, which is not aligned to the size of
106 * struct srp_direct_buf. The whole structure must be packed to avoid
107 * having the 20-byte structure padded to 24 bytes on 64-bit architectures.
109 struct srp_indirect_buf {
110 struct srp_direct_buf table_desc __packed __aligned(4);
112 struct srp_direct_buf desc_list[] __packed __aligned(4);
115 /* Immediate data buffer descriptor as defined in SRP2. */
120 /* srp_login_req.flags */
122 SRP_MULTICHAN_SINGLE = 0,
123 SRP_MULTICHAN_MULTI = 1,
124 SRP_IMMED_REQUESTED = 0x80, /* new in SRP2 */
127 struct srp_login_req {
131 __be32 req_it_iu_len;
136 __be16 imm_data_offset; /* new in SRP2 */
138 u8 initiator_port_id[16];
139 u8 target_port_id[16];
143 * struct srp_login_req_rdma - RDMA/CM login parameters.
145 * RDMA/CM over InfiniBand can only carry 92 - 36 = 56 bytes of private
146 * data. The %srp_login_req_rdma structure contains the same information as
147 * %srp_login_req but with the reserved data removed.
149 struct srp_login_req_rdma {
154 __be32 req_it_iu_len;
155 u8 initiator_port_id[16];
156 u8 target_port_id[16];
157 __be16 imm_data_offset;
161 /* srp_login_rsp.rsp_flags */
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 */
170 * The SRP spec defines the size of the LOGIN_RSP structure to be 52
171 * bytes, so it needs to be packed to avoid having it padded to 56
172 * bytes on 64-bit architectures.
174 struct srp_login_rsp {
177 __be32 req_lim_delta;
178 u64 tag __packed __aligned(4);
179 __be32 max_it_iu_len;
180 __be32 max_ti_iu_len;
186 struct srp_login_rej {
196 struct srp_i_logout {
202 struct srp_t_logout {
210 struct srp_tsk_mgmt {
229 u8 data_out_desc_cnt;
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 << 5
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 on
254 * 64-bit architectures.
260 __be32 req_lim_delta;
261 u64 tag __packed __aligned(4);
265 __be32 data_out_res_cnt;
266 __be32 data_in_res_cnt;
267 __be32 sense_data_len;
268 __be32 resp_data_len;
272 struct srp_cred_req {
276 __be32 req_lim_delta;
280 struct srp_cred_rsp {
287 * The SRP spec defines the fixed portion of the AER_REQ structure to be
288 * 36 bytes, so it needs to be packed to avoid having it padded to 40 bytes
289 * on 64-bit architectures.
295 __be32 req_lim_delta;
296 u64 tag __packed __aligned(4);
299 __be32 sense_data_len;
310 #endif /* SCSI_SRP_H */