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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 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
46enum {
47 SRP_LOGIN_REQ = 0x00,
48 SRP_TSK_MGMT = 0x01,
49 SRP_CMD = 0x02,
50 SRP_I_LOGOUT = 0x03,
51 SRP_LOGIN_RSP = 0xc0,
52 SRP_RSP = 0xc1,
53 SRP_LOGIN_REJ = 0xc2,
54 SRP_T_LOGOUT = 0x80,
55 SRP_CRED_REQ = 0x81,
56 SRP_AER_REQ = 0x82,
57 SRP_CRED_RSP = 0x41,
58 SRP_AER_RSP = 0x42
59};
60
61enum {
62 SRP_BUF_FORMAT_DIRECT = 1 << 1,
63 SRP_BUF_FORMAT_INDIRECT = 1 << 2
64};
65
66enum {
67 SRP_NO_DATA_DESC = 0,
68 SRP_DATA_DESC_DIRECT = 1,
69 SRP_DATA_DESC_INDIRECT = 2
70};
71
72enum {
73 SRP_TSK_ABORT_TASK = 0x01,
74 SRP_TSK_ABORT_TASK_SET = 0x02,
75 SRP_TSK_CLEAR_TASK_SET = 0x04,
76 SRP_TSK_LUN_RESET = 0x08,
77 SRP_TSK_CLEAR_ACA = 0x40
78};
79
80enum srp_login_rej_reason {
81 SRP_LOGIN_REJ_UNABLE_ESTABLISH_CHANNEL = 0x00010000,
82 SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES = 0x00010001,
83 SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE = 0x00010002,
84 SRP_LOGIN_REJ_UNABLE_ASSOCIATE_CHANNEL = 0x00010003,
85 SRP_LOGIN_REJ_UNSUPPORTED_DESCRIPTOR_FMT = 0x00010004,
86 SRP_LOGIN_REJ_MULTI_CHANNEL_UNSUPPORTED = 0x00010005,
87 SRP_LOGIN_REJ_CHANNEL_LIMIT_REACHED = 0x00010006
88};
89
90struct srp_direct_buf {
91 __be64 va;
92 __be32 key;
93 __be32 len;
94};
95
96/*
97 * We need the packed attribute because the SRP spec puts the list of
98 * descriptors at an offset of 20, which is not aligned to the size
99 * of struct srp_direct_buf.
100 */
101struct srp_indirect_buf {
102 struct srp_direct_buf table_desc;
103 __be32 len;
104 struct srp_direct_buf desc_list[0] __attribute__((packed));
105};
106
107enum {
108 SRP_MULTICHAN_SINGLE = 0,
109 SRP_MULTICHAN_MULTI = 1
110};
111
112struct srp_login_req {
113 u8 opcode;
114 u8 reserved1[7];
115 u64 tag;
116 __be32 req_it_iu_len;
117 u8 reserved2[4];
118 __be16 req_buf_fmt;
119 u8 req_flags;
120 u8 reserved3[5];
121 u8 initiator_port_id[16];
122 u8 target_port_id[16];
123};
124
125struct srp_login_rsp {
126 u8 opcode;
127 u8 reserved1[3];
128 __be32 req_lim_delta;
129 u64 tag;
130 __be32 max_it_iu_len;
131 __be32 max_ti_iu_len;
132 __be16 buf_fmt;
133 u8 rsp_flags;
134 u8 reserved2[25];
135};
136
137struct srp_login_rej {
138 u8 opcode;
139 u8 reserved1[3];
140 __be32 reason;
141 u64 tag;
142 u8 reserved2[8];
143 __be16 buf_fmt;
144 u8 reserved3[6];
145};
146
147struct srp_i_logout {
148 u8 opcode;
149 u8 reserved[7];
150 u64 tag;
151};
152
153struct srp_t_logout {
154 u8 opcode;
155 u8 sol_not;
156 u8 reserved[2];
157 __be32 reason;
158 u64 tag;
159};
160
161/*
162 * We need the packed attribute because the SRP spec only aligns the
163 * 8-byte LUN field to 4 bytes.
164 */
165struct srp_tsk_mgmt {
166 u8 opcode;
167 u8 sol_not;
168 u8 reserved1[6];
169 u64 tag;
170 u8 reserved2[4];
171 __be64 lun __attribute__((packed));
172 u8 reserved3[2];
173 u8 tsk_mgmt_func;
174 u8 reserved4;
175 u64 task_tag;
176 u8 reserved5[8];
177};
178
179/*
180 * We need the packed attribute because the SRP spec only aligns the
181 * 8-byte LUN field to 4 bytes.
182 */
183struct srp_cmd {
184 u8 opcode;
185 u8 sol_not;
186 u8 reserved1[3];
187 u8 buf_fmt;
188 u8 data_out_desc_cnt;
189 u8 data_in_desc_cnt;
190 u64 tag;
191 u8 reserved2[4];
192 __be64 lun __attribute__((packed));
193 u8 reserved3;
194 u8 task_attr;
195 u8 reserved4;
196 u8 add_cdb_len;
197 u8 cdb[16];
198 u8 add_data[0];
199};
200
201enum {
202 SRP_RSP_FLAG_RSPVALID = 1 << 0,
203 SRP_RSP_FLAG_SNSVALID = 1 << 1,
204 SRP_RSP_FLAG_DOOVER = 1 << 2,
205 SRP_RSP_FLAG_DOUNDER = 1 << 3,
206 SRP_RSP_FLAG_DIOVER = 1 << 4,
207 SRP_RSP_FLAG_DIUNDER = 1 << 5
208};
209
210struct srp_rsp {
211 u8 opcode;
212 u8 sol_not;
213 u8 reserved1[2];
214 __be32 req_lim_delta;
215 u64 tag;
216 u8 reserved2[2];
217 u8 flags;
218 u8 status;
219 __be32 data_out_res_cnt;
220 __be32 data_in_res_cnt;
221 __be32 sense_data_len;
222 __be32 resp_data_len;
223 u8 data[0];
224};
225
226#endif /* SCSI_SRP_H */
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