root / hw / srp.h @ d3674c57
History | View | Annotate | Download (6.4 kB)
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 |
*/
|
33 |
|
34 |
#ifndef SCSI_SRP_H
|
35 |
#define SCSI_SRP_H
|
36 |
|
37 |
/*
|
38 |
* Structures and constants for the SCSI RDMA Protocol (SRP) as
|
39 |
* defined by the INCITS T10 committee. This file was written using
|
40 |
* draft Revision 16a of the SRP standard.
|
41 |
*/
|
42 |
|
43 |
enum {
|
44 |
|
45 |
SRP_LOGIN_REQ = 0x00,
|
46 |
SRP_TSK_MGMT = 0x01,
|
47 |
SRP_CMD = 0x02,
|
48 |
SRP_I_LOGOUT = 0x03,
|
49 |
SRP_LOGIN_RSP = 0xc0,
|
50 |
SRP_RSP = 0xc1,
|
51 |
SRP_LOGIN_REJ = 0xc2,
|
52 |
SRP_T_LOGOUT = 0x80,
|
53 |
SRP_CRED_REQ = 0x81,
|
54 |
SRP_AER_REQ = 0x82,
|
55 |
SRP_CRED_RSP = 0x41,
|
56 |
SRP_AER_RSP = 0x42
|
57 |
}; |
58 |
|
59 |
enum {
|
60 |
SRP_BUF_FORMAT_DIRECT = 1 << 1, |
61 |
SRP_BUF_FORMAT_INDIRECT = 1 << 2 |
62 |
}; |
63 |
|
64 |
enum {
|
65 |
SRP_NO_DATA_DESC = 0,
|
66 |
SRP_DATA_DESC_DIRECT = 1,
|
67 |
SRP_DATA_DESC_INDIRECT = 2
|
68 |
}; |
69 |
|
70 |
enum {
|
71 |
SRP_TSK_ABORT_TASK = 0x01,
|
72 |
SRP_TSK_ABORT_TASK_SET = 0x02,
|
73 |
SRP_TSK_CLEAR_TASK_SET = 0x04,
|
74 |
SRP_TSK_LUN_RESET = 0x08,
|
75 |
SRP_TSK_CLEAR_ACA = 0x40
|
76 |
}; |
77 |
|
78 |
enum srp_login_rej_reason {
|
79 |
SRP_LOGIN_REJ_UNABLE_ESTABLISH_CHANNEL = 0x00010000,
|
80 |
SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES = 0x00010001,
|
81 |
SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE = 0x00010002,
|
82 |
SRP_LOGIN_REJ_UNABLE_ASSOCIATE_CHANNEL = 0x00010003,
|
83 |
SRP_LOGIN_REJ_UNSUPPORTED_DESCRIPTOR_FMT = 0x00010004,
|
84 |
SRP_LOGIN_REJ_MULTI_CHANNEL_UNSUPPORTED = 0x00010005,
|
85 |
SRP_LOGIN_REJ_CHANNEL_LIMIT_REACHED = 0x00010006
|
86 |
}; |
87 |
|
88 |
enum {
|
89 |
SRP_REV10_IB_IO_CLASS = 0xff00,
|
90 |
SRP_REV16A_IB_IO_CLASS = 0x0100
|
91 |
}; |
92 |
|
93 |
struct srp_direct_buf {
|
94 |
uint64_t va; |
95 |
uint32_t key; |
96 |
uint32_t len; |
97 |
}; |
98 |
|
99 |
/*
|
100 |
* We need the packed attribute because the SRP spec puts the list of
|
101 |
* descriptors at an offset of 20, which is not aligned to the size of
|
102 |
* struct srp_direct_buf. The whole structure must be packed to avoid
|
103 |
* having the 20-byte structure padded to 24 bytes on 64-bit architectures.
|
104 |
*/
|
105 |
struct srp_indirect_buf {
|
106 |
struct srp_direct_buf table_desc;
|
107 |
uint32_t len; |
108 |
struct srp_direct_buf desc_list[0]; |
109 |
} __attribute__((packed)); |
110 |
|
111 |
enum {
|
112 |
SRP_MULTICHAN_SINGLE = 0,
|
113 |
SRP_MULTICHAN_MULTI = 1
|
114 |
}; |
115 |
|
116 |
struct srp_login_req {
|
117 |
uint8_t opcode; |
118 |
uint8_t reserved1[7];
|
119 |
uint64_t tag; |
120 |
uint32_t req_it_iu_len; |
121 |
uint8_t reserved2[4];
|
122 |
uint16_t req_buf_fmt; |
123 |
uint8_t req_flags; |
124 |
uint8_t reserved3[5];
|
125 |
uint8_t initiator_port_id[16];
|
126 |
uint8_t target_port_id[16];
|
127 |
}; |
128 |
|
129 |
/*
|
130 |
* The SRP spec defines the size of the LOGIN_RSP structure to be 52
|
131 |
* bytes, so it needs to be packed to avoid having it padded to 56
|
132 |
* bytes on 64-bit architectures.
|
133 |
*/
|
134 |
struct srp_login_rsp {
|
135 |
uint8_t opcode; |
136 |
uint8_t reserved1[3];
|
137 |
uint32_t req_lim_delta; |
138 |
uint64_t tag; |
139 |
uint32_t max_it_iu_len; |
140 |
uint32_t max_ti_iu_len; |
141 |
uint16_t buf_fmt; |
142 |
uint8_t rsp_flags; |
143 |
uint8_t reserved2[25];
|
144 |
} __attribute__((packed)); |
145 |
|
146 |
struct srp_login_rej {
|
147 |
uint8_t opcode; |
148 |
uint8_t reserved1[3];
|
149 |
uint32_t reason; |
150 |
uint64_t tag; |
151 |
uint8_t reserved2[8];
|
152 |
uint16_t buf_fmt; |
153 |
uint8_t reserved3[6];
|
154 |
}; |
155 |
|
156 |
struct srp_i_logout {
|
157 |
uint8_t opcode; |
158 |
uint8_t reserved[7];
|
159 |
uint64_t tag; |
160 |
}; |
161 |
|
162 |
struct srp_t_logout {
|
163 |
uint8_t opcode; |
164 |
uint8_t sol_not; |
165 |
uint8_t reserved[2];
|
166 |
uint32_t reason; |
167 |
uint64_t tag; |
168 |
}; |
169 |
|
170 |
/*
|
171 |
* We need the packed attribute because the SRP spec only aligns the
|
172 |
* 8-byte LUN field to 4 bytes.
|
173 |
*/
|
174 |
struct srp_tsk_mgmt {
|
175 |
uint8_t opcode; |
176 |
uint8_t sol_not; |
177 |
uint8_t reserved1[6];
|
178 |
uint64_t tag; |
179 |
uint8_t reserved2[4];
|
180 |
uint64_t lun __attribute__((packed)); |
181 |
uint8_t reserved3[2];
|
182 |
uint8_t tsk_mgmt_func; |
183 |
uint8_t reserved4; |
184 |
uint64_t task_tag; |
185 |
uint8_t reserved5[8];
|
186 |
}; |
187 |
|
188 |
/*
|
189 |
* We need the packed attribute because the SRP spec only aligns the
|
190 |
* 8-byte LUN field to 4 bytes.
|
191 |
*/
|
192 |
struct srp_cmd {
|
193 |
uint8_t opcode; |
194 |
uint8_t sol_not; |
195 |
uint8_t reserved1[3];
|
196 |
uint8_t buf_fmt; |
197 |
uint8_t data_out_desc_cnt; |
198 |
uint8_t data_in_desc_cnt; |
199 |
uint64_t tag; |
200 |
uint8_t reserved2[4];
|
201 |
uint64_t lun __attribute__((packed)); |
202 |
uint8_t reserved3; |
203 |
uint8_t task_attr; |
204 |
uint8_t reserved4; |
205 |
uint8_t add_cdb_len; |
206 |
uint8_t cdb[16];
|
207 |
uint8_t add_data[0];
|
208 |
}; |
209 |
|
210 |
enum {
|
211 |
SRP_RSP_FLAG_RSPVALID = 1 << 0, |
212 |
SRP_RSP_FLAG_SNSVALID = 1 << 1, |
213 |
SRP_RSP_FLAG_DOOVER = 1 << 2, |
214 |
SRP_RSP_FLAG_DOUNDER = 1 << 3, |
215 |
SRP_RSP_FLAG_DIOVER = 1 << 4, |
216 |
SRP_RSP_FLAG_DIUNDER = 1 << 5 |
217 |
}; |
218 |
|
219 |
/*
|
220 |
* The SRP spec defines the size of the RSP structure to be 36 bytes,
|
221 |
* so it needs to be packed to avoid having it padded to 40 bytes on
|
222 |
* 64-bit architectures.
|
223 |
*/
|
224 |
struct srp_rsp {
|
225 |
uint8_t opcode; |
226 |
uint8_t sol_not; |
227 |
uint8_t reserved1[2];
|
228 |
uint32_t req_lim_delta; |
229 |
uint64_t tag; |
230 |
uint8_t reserved2[2];
|
231 |
uint8_t flags; |
232 |
uint8_t status; |
233 |
uint32_t data_out_res_cnt; |
234 |
uint32_t data_in_res_cnt; |
235 |
uint32_t sense_data_len; |
236 |
uint32_t resp_data_len; |
237 |
uint8_t data[0];
|
238 |
} __attribute__((packed)); |
239 |
|
240 |
#endif /* SCSI_SRP_H */ |