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aef9ec39 RD |
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> | |
985aa495 | 45 | #include <scsi/scsi.h> |
aef9ec39 RD |
46 | |
47 | enum { | |
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 = 0x42 | |
60 | }; | |
61 | ||
62 | enum { | |
63 | SRP_BUF_FORMAT_DIRECT = 1 << 1, | |
64 | SRP_BUF_FORMAT_INDIRECT = 1 << 2 | |
65 | }; | |
66 | ||
67 | enum { | |
68 | SRP_NO_DATA_DESC = 0, | |
69 | SRP_DATA_DESC_DIRECT = 1, | |
70 | SRP_DATA_DESC_INDIRECT = 2 | |
71 | }; | |
72 | ||
73 | enum { | |
74 | SRP_TSK_ABORT_TASK = 0x01, | |
75 | SRP_TSK_ABORT_TASK_SET = 0x02, | |
76 | SRP_TSK_CLEAR_TASK_SET = 0x04, | |
77 | SRP_TSK_LUN_RESET = 0x08, | |
78 | SRP_TSK_CLEAR_ACA = 0x40 | |
79 | }; | |
80 | ||
81 | enum srp_login_rej_reason { | |
82 | SRP_LOGIN_REJ_UNABLE_ESTABLISH_CHANNEL = 0x00010000, | |
83 | SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES = 0x00010001, | |
84 | SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE = 0x00010002, | |
85 | SRP_LOGIN_REJ_UNABLE_ASSOCIATE_CHANNEL = 0x00010003, | |
86 | SRP_LOGIN_REJ_UNSUPPORTED_DESCRIPTOR_FMT = 0x00010004, | |
87 | SRP_LOGIN_REJ_MULTI_CHANNEL_UNSUPPORTED = 0x00010005, | |
88 | SRP_LOGIN_REJ_CHANNEL_LIMIT_REACHED = 0x00010006 | |
89 | }; | |
90 | ||
73c0996b R |
91 | enum { |
92 | SRP_REV10_IB_IO_CLASS = 0xff00, | |
93 | SRP_REV16A_IB_IO_CLASS = 0x0100 | |
94 | }; | |
95 | ||
aef9ec39 RD |
96 | struct srp_direct_buf { |
97 | __be64 va; | |
98 | __be32 key; | |
99 | __be32 len; | |
100 | }; | |
101 | ||
102 | /* | |
103 | * We need the packed attribute because the SRP spec puts the list of | |
ec448a0a RD |
104 | * descriptors at an offset of 20, which is not aligned to the size of |
105 | * struct srp_direct_buf. The whole structure must be packed to avoid | |
106 | * having the 20-byte structure padded to 24 bytes on 64-bit architectures. | |
aef9ec39 RD |
107 | */ |
108 | struct srp_indirect_buf { | |
109 | struct srp_direct_buf table_desc; | |
110 | __be32 len; | |
ec448a0a RD |
111 | struct srp_direct_buf desc_list[0]; |
112 | } __attribute__((packed)); | |
aef9ec39 RD |
113 | |
114 | enum { | |
115 | SRP_MULTICHAN_SINGLE = 0, | |
116 | SRP_MULTICHAN_MULTI = 1 | |
117 | }; | |
118 | ||
119 | struct srp_login_req { | |
120 | u8 opcode; | |
121 | u8 reserved1[7]; | |
122 | u64 tag; | |
123 | __be32 req_it_iu_len; | |
124 | u8 reserved2[4]; | |
125 | __be16 req_buf_fmt; | |
126 | u8 req_flags; | |
127 | u8 reserved3[5]; | |
128 | u8 initiator_port_id[16]; | |
129 | u8 target_port_id[16]; | |
130 | }; | |
131 | ||
19f31343 BVA |
132 | /** |
133 | * struct srp_login_req_rdma - RDMA/CM login parameters. | |
134 | * | |
135 | * RDMA/CM over InfiniBand can only carry 92 - 36 = 56 bytes of private | |
136 | * data. The %srp_login_req_rdma structure contains the same information as | |
137 | * %srp_login_req but with the reserved data removed. | |
138 | */ | |
139 | struct srp_login_req_rdma { | |
140 | u64 tag; | |
141 | __be16 req_buf_fmt; | |
142 | u8 req_flags; | |
143 | u8 opcode; | |
144 | __be32 req_it_iu_len; | |
145 | u8 initiator_port_id[16]; | |
146 | u8 target_port_id[16]; | |
147 | }; | |
148 | ||
ec448a0a RD |
149 | /* |
150 | * The SRP spec defines the size of the LOGIN_RSP structure to be 52 | |
151 | * bytes, so it needs to be packed to avoid having it padded to 56 | |
152 | * bytes on 64-bit architectures. | |
153 | */ | |
aef9ec39 RD |
154 | struct srp_login_rsp { |
155 | u8 opcode; | |
156 | u8 reserved1[3]; | |
157 | __be32 req_lim_delta; | |
158 | u64 tag; | |
159 | __be32 max_it_iu_len; | |
160 | __be32 max_ti_iu_len; | |
161 | __be16 buf_fmt; | |
162 | u8 rsp_flags; | |
163 | u8 reserved2[25]; | |
ec448a0a | 164 | } __attribute__((packed)); |
aef9ec39 RD |
165 | |
166 | struct srp_login_rej { | |
167 | u8 opcode; | |
168 | u8 reserved1[3]; | |
169 | __be32 reason; | |
170 | u64 tag; | |
171 | u8 reserved2[8]; | |
172 | __be16 buf_fmt; | |
173 | u8 reserved3[6]; | |
174 | }; | |
175 | ||
176 | struct srp_i_logout { | |
177 | u8 opcode; | |
178 | u8 reserved[7]; | |
179 | u64 tag; | |
180 | }; | |
181 | ||
182 | struct srp_t_logout { | |
183 | u8 opcode; | |
184 | u8 sol_not; | |
185 | u8 reserved[2]; | |
186 | __be32 reason; | |
187 | u64 tag; | |
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_tsk_mgmt { | |
195 | u8 opcode; | |
196 | u8 sol_not; | |
197 | u8 reserved1[6]; | |
198 | u64 tag; | |
199 | u8 reserved2[4]; | |
985aa495 | 200 | struct scsi_lun lun; |
aef9ec39 RD |
201 | u8 reserved3[2]; |
202 | u8 tsk_mgmt_func; | |
203 | u8 reserved4; | |
204 | u64 task_tag; | |
205 | u8 reserved5[8]; | |
206 | }; | |
207 | ||
208 | /* | |
209 | * We need the packed attribute because the SRP spec only aligns the | |
210 | * 8-byte LUN field to 4 bytes. | |
211 | */ | |
212 | struct srp_cmd { | |
213 | u8 opcode; | |
214 | u8 sol_not; | |
215 | u8 reserved1[3]; | |
216 | u8 buf_fmt; | |
217 | u8 data_out_desc_cnt; | |
218 | u8 data_in_desc_cnt; | |
219 | u64 tag; | |
220 | u8 reserved2[4]; | |
985aa495 | 221 | struct scsi_lun lun; |
aef9ec39 RD |
222 | u8 reserved3; |
223 | u8 task_attr; | |
224 | u8 reserved4; | |
225 | u8 add_cdb_len; | |
226 | u8 cdb[16]; | |
227 | u8 add_data[0]; | |
228 | }; | |
229 | ||
230 | enum { | |
231 | SRP_RSP_FLAG_RSPVALID = 1 << 0, | |
232 | SRP_RSP_FLAG_SNSVALID = 1 << 1, | |
233 | SRP_RSP_FLAG_DOOVER = 1 << 2, | |
234 | SRP_RSP_FLAG_DOUNDER = 1 << 3, | |
235 | SRP_RSP_FLAG_DIOVER = 1 << 4, | |
236 | SRP_RSP_FLAG_DIUNDER = 1 << 5 | |
237 | }; | |
238 | ||
ec448a0a RD |
239 | /* |
240 | * The SRP spec defines the size of the RSP structure to be 36 bytes, | |
241 | * so it needs to be packed to avoid having it padded to 40 bytes on | |
242 | * 64-bit architectures. | |
243 | */ | |
aef9ec39 RD |
244 | struct srp_rsp { |
245 | u8 opcode; | |
246 | u8 sol_not; | |
247 | u8 reserved1[2]; | |
248 | __be32 req_lim_delta; | |
249 | u64 tag; | |
250 | u8 reserved2[2]; | |
251 | u8 flags; | |
252 | u8 status; | |
253 | __be32 data_out_res_cnt; | |
254 | __be32 data_in_res_cnt; | |
255 | __be32 sense_data_len; | |
256 | __be32 resp_data_len; | |
257 | u8 data[0]; | |
ec448a0a | 258 | } __attribute__((packed)); |
aef9ec39 | 259 | |
bb12588a DD |
260 | struct srp_cred_req { |
261 | u8 opcode; | |
262 | u8 sol_not; | |
263 | u8 reserved[2]; | |
264 | __be32 req_lim_delta; | |
265 | u64 tag; | |
266 | }; | |
267 | ||
268 | struct srp_cred_rsp { | |
269 | u8 opcode; | |
270 | u8 reserved[7]; | |
271 | u64 tag; | |
272 | }; | |
273 | ||
274 | /* | |
275 | * The SRP spec defines the fixed portion of the AER_REQ structure to be | |
276 | * 36 bytes, so it needs to be packed to avoid having it padded to 40 bytes | |
277 | * on 64-bit architectures. | |
278 | */ | |
279 | struct srp_aer_req { | |
280 | u8 opcode; | |
281 | u8 sol_not; | |
282 | u8 reserved[2]; | |
283 | __be32 req_lim_delta; | |
284 | u64 tag; | |
285 | u32 reserved2; | |
985aa495 | 286 | struct scsi_lun lun; |
bb12588a DD |
287 | __be32 sense_data_len; |
288 | u32 reserved3; | |
289 | u8 sense_data[0]; | |
290 | } __attribute__((packed)); | |
291 | ||
292 | struct srp_aer_rsp { | |
293 | u8 opcode; | |
294 | u8 reserved[7]; | |
295 | u64 tag; | |
296 | }; | |
297 | ||
aef9ec39 | 298 | #endif /* SCSI_SRP_H */ |