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
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
|
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
* FC Transport BSG Interface
*
* Copyright (C) 2008 James Smart, Emulex Corporation
*/
#ifndef SCSI_BSG_FC_H
#define SCSI_BSG_FC_H
#include <linux/types.h>
/*
* This file intended to be included by both kernel and user space
*/
/*
* FC Transport SGIO v4 BSG Message Support
*/
/* Default BSG request timeout (in seconds) */
#define FC_DEFAULT_BSG_TIMEOUT (10 * HZ)
/*
* Request Message Codes supported by the FC Transport
*/
/* define the class masks for the message codes */
#define FC_BSG_CLS_MASK 0xF0000000 /* find object class */
#define FC_BSG_HST_MASK 0x80000000 /* fc host class */
#define FC_BSG_RPT_MASK 0x40000000 /* fc rport class */
/* fc_host Message Codes */
#define FC_BSG_HST_ADD_RPORT (FC_BSG_HST_MASK | 0x00000001)
#define FC_BSG_HST_DEL_RPORT (FC_BSG_HST_MASK | 0x00000002)
#define FC_BSG_HST_ELS_NOLOGIN (FC_BSG_HST_MASK | 0x00000003)
#define FC_BSG_HST_CT (FC_BSG_HST_MASK | 0x00000004)
#define FC_BSG_HST_VENDOR (FC_BSG_HST_MASK | 0x000000FF)
/* fc_rport Message Codes */
#define FC_BSG_RPT_ELS (FC_BSG_RPT_MASK | 0x00000001)
#define FC_BSG_RPT_CT (FC_BSG_RPT_MASK | 0x00000002)
/*
* FC Address Identifiers in Message Structures :
*
* Whenever a command payload contains a FC Address Identifier
* (aka port_id), the value is effectively in big-endian
* order, thus the array elements are decoded as follows:
* element [0] is bits 23:16 of the FC Address Identifier
* element [1] is bits 15:8 of the FC Address Identifier
* element [2] is bits 7:0 of the FC Address Identifier
*/
/*
* FC Host Messages
*/
/* FC_BSG_HST_ADDR_PORT : */
/* Request:
* This message requests the FC host to login to the remote port
* at the specified N_Port_Id. The remote port is to be enumerated
* with the transport upon completion of the login.
*/
struct fc_bsg_host_add_rport {
__u8 reserved;
/* FC Address Identier of the remote port to login to */
__u8 port_id[3];
};
/* Response:
* There is no additional response data - fc_bsg_reply->result is sufficient
*/
/* FC_BSG_HST_DEL_RPORT : */
/* Request:
* This message requests the FC host to remove an enumerated
* remote port and to terminate the login to it.
*
* Note: The driver is free to reject this request if it desires to
* remain logged in with the remote port.
*/
struct fc_bsg_host_del_rport {
__u8 reserved;
/* FC Address Identier of the remote port to logout of */
__u8 port_id[3];
};
/* Response:
* There is no additional response data - fc_bsg_reply->result is sufficient
*/
/* FC_BSG_HST_ELS_NOLOGIN : */
/* Request:
* This message requests the FC_Host to send an ELS to a specific
* N_Port_ID. The host does not need to log into the remote port,
* nor does it need to enumerate the rport for further traffic
* (although, the FC host is free to do so if it desires).
*/
struct fc_bsg_host_els {
/*
* ELS Command Code being sent (must be the same as byte 0
* of the payload)
*/
__u8 command_code;
/* FC Address Identier of the remote port to send the ELS to */
__u8 port_id[3];
};
/* Response:
*/
/* fc_bsg_ctels_reply->status values */
#define FC_CTELS_STATUS_OK 0x00000000
#define FC_CTELS_STATUS_REJECT 0x00000001
#define FC_CTELS_STATUS_P_RJT 0x00000002
#define FC_CTELS_STATUS_F_RJT 0x00000003
#define FC_CTELS_STATUS_P_BSY 0x00000004
#define FC_CTELS_STATUS_F_BSY 0x00000006
struct fc_bsg_ctels_reply {
/*
* Note: An ELS LS_RJT may be reported in 2 ways:
* a) A status of FC_CTELS_STATUS_OK is returned. The caller
* is to look into the ELS receive payload to determine
* LS_ACC or LS_RJT (by contents of word 0). The reject
* data will be in word 1.
* b) A status of FC_CTELS_STATUS_REJECT is returned, The
* rjt_data field will contain valid data.
*
* Note: ELS LS_ACC is determined by an FC_CTELS_STATUS_OK, and
* the receive payload word 0 indicates LS_ACC
* (e.g. value is 0x02xxxxxx).
*
* Note: Similarly, a CT Reject may be reported in 2 ways:
* a) A status of FC_CTELS_STATUS_OK is returned. The caller
* is to look into the CT receive payload to determine
* Accept or Reject (by contents of word 2). The reject
* data will be in word 3.
* b) A status of FC_CTELS_STATUS_REJECT is returned, The
* rjt_data field will contain valid data.
*
* Note: x_RJT/BSY status will indicae that the rjt_data field
* is valid and contains the reason/explanation values.
*/
__u32 status; /* See FC_CTELS_STATUS_xxx */
/* valid if status is not FC_CTELS_STATUS_OK */
struct {
__u8 action; /* fragment_id for CT REJECT */
__u8 reason_code;
__u8 reason_explanation;
__u8 vendor_unique;
} rjt_data;
};
/* FC_BSG_HST_CT : */
/* Request:
* This message requests that a CT Request be performed with the
* indicated N_Port_ID. The driver is responsible for logging in with
* the fabric and/or N_Port_ID, etc as per FC rules. This request does
* not mandate that the driver must enumerate the destination in the
* transport. The driver is allowed to decide whether to enumerate it,
* and whether to tear it down after the request.
*/
struct fc_bsg_host_ct {
__u8 reserved;
/* FC Address Identier of the remote port to send the ELS to */
__u8 port_id[3];
/*
* We need words 0-2 of the generic preamble for the LLD's
*/
__u32 preamble_word0; /* revision & IN_ID */
__u32 preamble_word1; /* GS_Type, GS_SubType, Options, Rsvd */
__u32 preamble_word2; /* Cmd Code, Max Size */
};
/* Response:
*
* The reply structure is an fc_bsg_ctels_reply structure
*/
/* FC_BSG_HST_VENDOR : */
/* Request:
* Note: When specifying vendor_id, be sure to read the Vendor Type and ID
* formatting requirements specified in scsi_netlink.h
*/
struct fc_bsg_host_vendor {
/*
* Identifies the vendor that the message is formatted for. This
* should be the recipient of the message.
*/
__u64 vendor_id;
/* start of vendor command area */
__u32 vendor_cmd[0];
};
/* Response:
*/
struct fc_bsg_host_vendor_reply {
/* start of vendor response area */
__u32 vendor_rsp[0];
};
/*
* FC Remote Port Messages
*/
/* FC_BSG_RPT_ELS : */
/* Request:
* This message requests that an ELS be performed with the rport.
*/
struct fc_bsg_rport_els {
/*
* ELS Command Code being sent (must be the same as
* byte 0 of the payload)
*/
__u8 els_code;
};
/* Response:
*
* The reply structure is an fc_bsg_ctels_reply structure
*/
/* FC_BSG_RPT_CT : */
/* Request:
* This message requests that a CT Request be performed with the rport.
*/
struct fc_bsg_rport_ct {
/*
* We need words 0-2 of the generic preamble for the LLD's
*/
__u32 preamble_word0; /* revision & IN_ID */
__u32 preamble_word1; /* GS_Type, GS_SubType, Options, Rsvd */
__u32 preamble_word2; /* Cmd Code, Max Size */
};
/* Response:
*
* The reply structure is an fc_bsg_ctels_reply structure
*/
/* request (CDB) structure of the sg_io_v4 */
struct fc_bsg_request {
__u32 msgcode;
union {
struct fc_bsg_host_add_rport h_addrport;
struct fc_bsg_host_del_rport h_delrport;
struct fc_bsg_host_els h_els;
struct fc_bsg_host_ct h_ct;
struct fc_bsg_host_vendor h_vendor;
struct fc_bsg_rport_els r_els;
struct fc_bsg_rport_ct r_ct;
} rqst_data;
} __attribute__((packed));
/* response (request sense data) structure of the sg_io_v4 */
struct fc_bsg_reply {
/*
* The completion result. Result exists in two forms:
* if negative, it is an -Exxx system errno value. There will
* be no further reply information supplied.
* else, it's the 4-byte scsi error result, with driver, host,
* msg and status fields. The per-msgcode reply structure
* will contain valid data.
*/
__u32 result;
/* If there was reply_payload, how much was recevied ? */
__u32 reply_payload_rcv_len;
union {
struct fc_bsg_host_vendor_reply vendor_reply;
struct fc_bsg_ctels_reply ctels_reply;
} reply_data;
};
#endif /* SCSI_BSG_FC_H */
|
