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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 | struct 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 | |
ec448a0a RD |
98 | * descriptors at an offset of 20, which is not aligned to the size of |
99 | * struct srp_direct_buf. The whole structure must be packed to avoid | |
100 | * having the 20-byte structure padded to 24 bytes on 64-bit architectures. | |
aef9ec39 RD |
101 | */ |
102 | struct srp_indirect_buf { | |
103 | struct srp_direct_buf table_desc; | |
104 | __be32 len; | |
ec448a0a RD |
105 | struct srp_direct_buf desc_list[0]; |
106 | } __attribute__((packed)); | |
aef9ec39 RD |
107 | |
108 | enum { | |
109 | SRP_MULTICHAN_SINGLE = 0, | |
110 | SRP_MULTICHAN_MULTI = 1 | |
111 | }; | |
112 | ||
113 | struct srp_login_req { | |
114 | u8 opcode; | |
115 | u8 reserved1[7]; | |
116 | u64 tag; | |
117 | __be32 req_it_iu_len; | |
118 | u8 reserved2[4]; | |
119 | __be16 req_buf_fmt; | |
120 | u8 req_flags; | |
121 | u8 reserved3[5]; | |
122 | u8 initiator_port_id[16]; | |
123 | u8 target_port_id[16]; | |
124 | }; | |
125 | ||
ec448a0a RD |
126 | /* |
127 | * The SRP spec defines the size of the LOGIN_RSP structure to be 52 | |
128 | * bytes, so it needs to be packed to avoid having it padded to 56 | |
129 | * bytes on 64-bit architectures. | |
130 | */ | |
aef9ec39 RD |
131 | struct srp_login_rsp { |
132 | u8 opcode; | |
133 | u8 reserved1[3]; | |
134 | __be32 req_lim_delta; | |
135 | u64 tag; | |
136 | __be32 max_it_iu_len; | |
137 | __be32 max_ti_iu_len; | |
138 | __be16 buf_fmt; | |
139 | u8 rsp_flags; | |
140 | u8 reserved2[25]; | |
ec448a0a | 141 | } __attribute__((packed)); |
aef9ec39 RD |
142 | |
143 | struct srp_login_rej { | |
144 | u8 opcode; | |
145 | u8 reserved1[3]; | |
146 | __be32 reason; | |
147 | u64 tag; | |
148 | u8 reserved2[8]; | |
149 | __be16 buf_fmt; | |
150 | u8 reserved3[6]; | |
151 | }; | |
152 | ||
153 | struct srp_i_logout { | |
154 | u8 opcode; | |
155 | u8 reserved[7]; | |
156 | u64 tag; | |
157 | }; | |
158 | ||
159 | struct srp_t_logout { | |
160 | u8 opcode; | |
161 | u8 sol_not; | |
162 | u8 reserved[2]; | |
163 | __be32 reason; | |
164 | u64 tag; | |
165 | }; | |
166 | ||
167 | /* | |
168 | * We need the packed attribute because the SRP spec only aligns the | |
169 | * 8-byte LUN field to 4 bytes. | |
170 | */ | |
171 | struct srp_tsk_mgmt { | |
172 | u8 opcode; | |
173 | u8 sol_not; | |
174 | u8 reserved1[6]; | |
175 | u64 tag; | |
176 | u8 reserved2[4]; | |
177 | __be64 lun __attribute__((packed)); | |
178 | u8 reserved3[2]; | |
179 | u8 tsk_mgmt_func; | |
180 | u8 reserved4; | |
181 | u64 task_tag; | |
182 | u8 reserved5[8]; | |
183 | }; | |
184 | ||
185 | /* | |
186 | * We need the packed attribute because the SRP spec only aligns the | |
187 | * 8-byte LUN field to 4 bytes. | |
188 | */ | |
189 | struct srp_cmd { | |
190 | u8 opcode; | |
191 | u8 sol_not; | |
192 | u8 reserved1[3]; | |
193 | u8 buf_fmt; | |
194 | u8 data_out_desc_cnt; | |
195 | u8 data_in_desc_cnt; | |
196 | u64 tag; | |
197 | u8 reserved2[4]; | |
198 | __be64 lun __attribute__((packed)); | |
199 | u8 reserved3; | |
200 | u8 task_attr; | |
201 | u8 reserved4; | |
202 | u8 add_cdb_len; | |
203 | u8 cdb[16]; | |
204 | u8 add_data[0]; | |
205 | }; | |
206 | ||
207 | enum { | |
208 | SRP_RSP_FLAG_RSPVALID = 1 << 0, | |
209 | SRP_RSP_FLAG_SNSVALID = 1 << 1, | |
210 | SRP_RSP_FLAG_DOOVER = 1 << 2, | |
211 | SRP_RSP_FLAG_DOUNDER = 1 << 3, | |
212 | SRP_RSP_FLAG_DIOVER = 1 << 4, | |
213 | SRP_RSP_FLAG_DIUNDER = 1 << 5 | |
214 | }; | |
215 | ||
ec448a0a RD |
216 | /* |
217 | * The SRP spec defines the size of the RSP structure to be 36 bytes, | |
218 | * so it needs to be packed to avoid having it padded to 40 bytes on | |
219 | * 64-bit architectures. | |
220 | */ | |
aef9ec39 RD |
221 | struct srp_rsp { |
222 | u8 opcode; | |
223 | u8 sol_not; | |
224 | u8 reserved1[2]; | |
225 | __be32 req_lim_delta; | |
226 | u64 tag; | |
227 | u8 reserved2[2]; | |
228 | u8 flags; | |
229 | u8 status; | |
230 | __be32 data_out_res_cnt; | |
231 | __be32 data_in_res_cnt; | |
232 | __be32 sense_data_len; | |
233 | __be32 resp_data_len; | |
234 | u8 data[0]; | |
ec448a0a | 235 | } __attribute__((packed)); |
aef9ec39 RD |
236 | |
237 | #endif /* SCSI_SRP_H */ |