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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 | |
46 | enum { |
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 | |
61 | enum { |
62 | SRP_BUF_FORMAT_DIRECT = 1 << 1, |
63 | SRP_BUF_FORMAT_INDIRECT = 1 << 2 |
64 | }; |
65 | |
66 | enum { |
67 | SRP_NO_DATA_DESC = 0, |
68 | SRP_DATA_DESC_DIRECT = 1, |
69 | SRP_DATA_DESC_INDIRECT = 2 |
70 | }; |
71 | |
72 | enum { |
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 | |
80 | enum 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 | |
90 | enum { |
91 | SRP_REV10_IB_IO_CLASS = 0xff00, |
92 | SRP_REV16A_IB_IO_CLASS = 0x0100 |
93 | }; |
94 | |
95 | struct srp_direct_buf { |
96 | __be64 va; |
97 | __be32 key; |
98 | __be32 len; |
99 | }; |
100 | |
101 | /* |
102 | * We need the packed attribute because the SRP spec puts the list of |
103 | * descriptors at an offset of 20, which is not aligned to the size of |
104 | * struct srp_direct_buf. The whole structure must be packed to avoid |
105 | * having the 20-byte structure padded to 24 bytes on 64-bit architectures. |
106 | */ |
107 | struct srp_indirect_buf { |
108 | struct srp_direct_buf table_desc; |
109 | __be32 len; |
110 | struct srp_direct_buf desc_list[0]; |
111 | } __attribute__((packed)); |
112 | |
113 | enum { |
114 | SRP_MULTICHAN_SINGLE = 0, |
115 | SRP_MULTICHAN_MULTI = 1 |
116 | }; |
117 | |
118 | struct srp_login_req { |
119 | u8 opcode; |
120 | u8 reserved1[7]; |
121 | u64 tag; |
122 | __be32 req_it_iu_len; |
123 | u8 reserved2[4]; |
124 | __be16 req_buf_fmt; |
125 | u8 req_flags; |
126 | u8 reserved3[5]; |
127 | u8 initiator_port_id[16]; |
128 | u8 target_port_id[16]; |
129 | }; |
130 | |
131 | /* |
132 | * The SRP spec defines the size of the LOGIN_RSP structure to be 52 |
133 | * bytes, so it needs to be packed to avoid having it padded to 56 |
134 | * bytes on 64-bit architectures. |
135 | */ |
136 | struct srp_login_rsp { |
137 | u8 opcode; |
138 | u8 reserved1[3]; |
139 | __be32 req_lim_delta; |
140 | u64 tag; |
141 | __be32 max_it_iu_len; |
142 | __be32 max_ti_iu_len; |
143 | __be16 buf_fmt; |
144 | u8 rsp_flags; |
145 | u8 reserved2[25]; |
146 | } __attribute__((packed)); |
147 | |
148 | struct srp_login_rej { |
149 | u8 opcode; |
150 | u8 reserved1[3]; |
151 | __be32 reason; |
152 | u64 tag; |
153 | u8 reserved2[8]; |
154 | __be16 buf_fmt; |
155 | u8 reserved3[6]; |
156 | }; |
157 | |
158 | struct srp_i_logout { |
159 | u8 opcode; |
160 | u8 reserved[7]; |
161 | u64 tag; |
162 | }; |
163 | |
164 | struct srp_t_logout { |
165 | u8 opcode; |
166 | u8 sol_not; |
167 | u8 reserved[2]; |
168 | __be32 reason; |
169 | u64 tag; |
170 | }; |
171 | |
172 | /* |
173 | * We need the packed attribute because the SRP spec only aligns the |
174 | * 8-byte LUN field to 4 bytes. |
175 | */ |
176 | struct srp_tsk_mgmt { |
177 | u8 opcode; |
178 | u8 sol_not; |
179 | u8 reserved1[6]; |
180 | u64 tag; |
181 | u8 reserved2[4]; |
182 | __be64 lun __attribute__((packed)); |
183 | u8 reserved3[2]; |
184 | u8 tsk_mgmt_func; |
185 | u8 reserved4; |
186 | u64 task_tag; |
187 | u8 reserved5[8]; |
188 | }; |
189 | |
190 | /* |
191 | * We need the packed attribute because the SRP spec only aligns the |
192 | * 8-byte LUN field to 4 bytes. |
193 | */ |
194 | struct srp_cmd { |
195 | u8 opcode; |
196 | u8 sol_not; |
197 | u8 reserved1[3]; |
198 | u8 buf_fmt; |
199 | u8 data_out_desc_cnt; |
200 | u8 data_in_desc_cnt; |
201 | u64 tag; |
202 | u8 reserved2[4]; |
203 | __be64 lun __attribute__((packed)); |
204 | u8 reserved3; |
205 | u8 task_attr; |
206 | u8 reserved4; |
207 | u8 add_cdb_len; |
208 | u8 cdb[16]; |
209 | u8 add_data[0]; |
210 | }; |
211 | |
212 | enum { |
213 | SRP_RSP_FLAG_RSPVALID = 1 << 0, |
214 | SRP_RSP_FLAG_SNSVALID = 1 << 1, |
215 | SRP_RSP_FLAG_DOOVER = 1 << 2, |
216 | SRP_RSP_FLAG_DOUNDER = 1 << 3, |
217 | SRP_RSP_FLAG_DIOVER = 1 << 4, |
218 | SRP_RSP_FLAG_DIUNDER = 1 << 5 |
219 | }; |
220 | |
221 | /* |
222 | * The SRP spec defines the size of the RSP structure to be 36 bytes, |
223 | * so it needs to be packed to avoid having it padded to 40 bytes on |
224 | * 64-bit architectures. |
225 | */ |
226 | struct srp_rsp { |
227 | u8 opcode; |
228 | u8 sol_not; |
229 | u8 reserved1[2]; |
230 | __be32 req_lim_delta; |
231 | u64 tag; |
232 | u8 reserved2[2]; |
233 | u8 flags; |
234 | u8 status; |
235 | __be32 data_out_res_cnt; |
236 | __be32 data_in_res_cnt; |
237 | __be32 sense_data_len; |
238 | __be32 resp_data_len; |
239 | u8 data[0]; |
240 | } __attribute__((packed)); |
241 | |
242 | #endif /* SCSI_SRP_H */ |
243 |
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