fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / scsi / srp.h
blobad178fa78f665a69fba3b4d26e66c9aee9443d75
1 /*
2 * Copyright (c) 2005 Cisco Systems. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
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.
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.
32 * $Id$
35 #ifndef SCSI_SRP_H
36 #define SCSI_SRP_H
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.
44 #include <linux/types.h>
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
61 enum {
62 SRP_BUF_FORMAT_DIRECT = 1 << 1,
63 SRP_BUF_FORMAT_INDIRECT = 1 << 2
66 enum {
67 SRP_NO_DATA_DESC = 0,
68 SRP_DATA_DESC_DIRECT = 1,
69 SRP_DATA_DESC_INDIRECT = 2
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
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
90 enum {
91 SRP_REV10_IB_IO_CLASS = 0xff00,
92 SRP_REV16A_IB_IO_CLASS = 0x0100
95 struct srp_direct_buf {
96 __be64 va;
97 __be32 key;
98 __be32 len;
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.
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));
113 enum {
114 SRP_MULTICHAN_SINGLE = 0,
115 SRP_MULTICHAN_MULTI = 1
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];
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.
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));
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];
158 struct srp_i_logout {
159 u8 opcode;
160 u8 reserved[7];
161 u64 tag;
164 struct srp_t_logout {
165 u8 opcode;
166 u8 sol_not;
167 u8 reserved[2];
168 __be32 reason;
169 u64 tag;
173 * We need the packed attribute because the SRP spec only aligns the
174 * 8-byte LUN field to 4 bytes.
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];
191 * We need the packed attribute because the SRP spec only aligns the
192 * 8-byte LUN field to 4 bytes.
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];
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
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.
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));
242 #endif /* SCSI_SRP_H */