summaryrefslogtreecommitdiff
path: root/hw/srp.h
blob: 5e0cad5c196fcd125b95d38c4ec3daf4e6e404c8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
/*
 * Copyright (c) 2005 Cisco Systems.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

#ifndef SCSI_SRP_H
#define SCSI_SRP_H

/*
 * Structures and constants for the SCSI RDMA Protocol (SRP) as
 * defined by the INCITS T10 committee.  This file was written using
 * draft Revision 16a of the SRP standard.
 */

enum {

    SRP_LOGIN_REQ = 0x00,
    SRP_TSK_MGMT  = 0x01,
    SRP_CMD       = 0x02,
    SRP_I_LOGOUT  = 0x03,
    SRP_LOGIN_RSP = 0xc0,
    SRP_RSP       = 0xc1,
    SRP_LOGIN_REJ = 0xc2,
    SRP_T_LOGOUT  = 0x80,
    SRP_CRED_REQ  = 0x81,
    SRP_AER_REQ   = 0x82,
    SRP_CRED_RSP  = 0x41,
    SRP_AER_RSP   = 0x42
};

enum {
    SRP_BUF_FORMAT_DIRECT   = 1 << 1,
    SRP_BUF_FORMAT_INDIRECT = 1 << 2
};

enum {
    SRP_NO_DATA_DESC       = 0,
    SRP_DATA_DESC_DIRECT   = 1,
    SRP_DATA_DESC_INDIRECT = 2
};

enum {
    SRP_TSK_ABORT_TASK     = 0x01,
    SRP_TSK_ABORT_TASK_SET = 0x02,
    SRP_TSK_CLEAR_TASK_SET = 0x04,
    SRP_TSK_LUN_RESET      = 0x08,
    SRP_TSK_CLEAR_ACA      = 0x40
};

enum srp_login_rej_reason {
    SRP_LOGIN_REJ_UNABLE_ESTABLISH_CHANNEL   = 0x00010000,
    SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES     = 0x00010001,
    SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE = 0x00010002,
    SRP_LOGIN_REJ_UNABLE_ASSOCIATE_CHANNEL   = 0x00010003,
    SRP_LOGIN_REJ_UNSUPPORTED_DESCRIPTOR_FMT = 0x00010004,
    SRP_LOGIN_REJ_MULTI_CHANNEL_UNSUPPORTED  = 0x00010005,
    SRP_LOGIN_REJ_CHANNEL_LIMIT_REACHED      = 0x00010006
};

enum {
    SRP_REV10_IB_IO_CLASS  = 0xff00,
    SRP_REV16A_IB_IO_CLASS = 0x0100
};

struct srp_direct_buf {
    uint64_t    va;
    uint32_t    key;
    uint32_t    len;
};

/*
 * We need the packed attribute because the SRP spec puts the list of
 * descriptors at an offset of 20, which is not aligned to the size of
 * struct srp_direct_buf.  The whole structure must be packed to avoid
 * having the 20-byte structure padded to 24 bytes on 64-bit architectures.
 */
struct srp_indirect_buf {
    struct srp_direct_buf    table_desc;
    uint32_t                 len;
    struct srp_direct_buf    desc_list[0];
} QEMU_PACKED;

enum {
    SRP_MULTICHAN_SINGLE = 0,
    SRP_MULTICHAN_MULTI  = 1
};

struct srp_login_req {
    uint8_t    opcode;
    uint8_t    reserved1[7];
    uint64_t   tag;
    uint32_t   req_it_iu_len;
    uint8_t    reserved2[4];
    uint16_t   req_buf_fmt;
    uint8_t    req_flags;
    uint8_t    reserved3[5];
    uint8_t    initiator_port_id[16];
    uint8_t    target_port_id[16];
};

/*
 * The SRP spec defines the size of the LOGIN_RSP structure to be 52
 * bytes, so it needs to be packed to avoid having it padded to 56
 * bytes on 64-bit architectures.
 */
struct srp_login_rsp {
    uint8_t    opcode;
    uint8_t    reserved1[3];
    uint32_t   req_lim_delta;
    uint64_t   tag;
    uint32_t   max_it_iu_len;
    uint32_t   max_ti_iu_len;
    uint16_t   buf_fmt;
    uint8_t    rsp_flags;
    uint8_t    reserved2[25];
} QEMU_PACKED;

struct srp_login_rej {
    uint8_t    opcode;
    uint8_t    reserved1[3];
    uint32_t   reason;
    uint64_t   tag;
    uint8_t    reserved2[8];
    uint16_t   buf_fmt;
    uint8_t    reserved3[6];
};

struct srp_i_logout {
    uint8_t    opcode;
    uint8_t    reserved[7];
    uint64_t   tag;
};

struct srp_t_logout {
    uint8_t    opcode;
    uint8_t    sol_not;
    uint8_t    reserved[2];
    uint32_t   reason;
    uint64_t   tag;
};

/*
 * We need the packed attribute because the SRP spec only aligns the
 * 8-byte LUN field to 4 bytes.
 */
struct srp_tsk_mgmt {
    uint8_t    opcode;
    uint8_t    sol_not;
    uint8_t    reserved1[6];
    uint64_t   tag;
    uint8_t    reserved2[4];
    uint64_t   lun;
    uint8_t    reserved3[2];
    uint8_t    tsk_mgmt_func;
    uint8_t    reserved4;
    uint64_t   task_tag;
    uint8_t    reserved5[8];
} QEMU_PACKED;

/*
 * We need the packed attribute because the SRP spec only aligns the
 * 8-byte LUN field to 4 bytes.
 */
struct srp_cmd {
    uint8_t    opcode;
    uint8_t    sol_not;
    uint8_t    reserved1[3];
    uint8_t    buf_fmt;
    uint8_t    data_out_desc_cnt;
    uint8_t    data_in_desc_cnt;
    uint64_t   tag;
    uint8_t    reserved2[4];
    uint64_t   lun;
    uint8_t    reserved3;
    uint8_t    task_attr;
    uint8_t    reserved4;
    uint8_t    add_cdb_len;
    uint8_t    cdb[16];
    uint8_t    add_data[0];
} QEMU_PACKED;

enum {
    SRP_RSP_FLAG_RSPVALID = 1 << 0,
    SRP_RSP_FLAG_SNSVALID = 1 << 1,
    SRP_RSP_FLAG_DOOVER   = 1 << 2,
    SRP_RSP_FLAG_DOUNDER  = 1 << 3,
    SRP_RSP_FLAG_DIOVER   = 1 << 4,
    SRP_RSP_FLAG_DIUNDER  = 1 << 5
};

/*
 * The SRP spec defines the size of the RSP structure to be 36 bytes,
 * so it needs to be packed to avoid having it padded to 40 bytes on
 * 64-bit architectures.
 */
struct srp_rsp {
    uint8_t    opcode;
    uint8_t    sol_not;
    uint8_t    reserved1[2];
    uint32_t   req_lim_delta;
    uint64_t   tag;
    uint8_t    reserved2[2];
    uint8_t    flags;
    uint8_t    status;
    uint32_t   data_out_res_cnt;
    uint32_t   data_in_res_cnt;
    uint32_t   sense_data_len;
    uint32_t   resp_data_len;
    uint8_t    data[0];
} QEMU_PACKED;

#endif /* SCSI_SRP_H */