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
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
|
/*
* Copyright (c) 2004, 2005 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2004, 2005 Infinicon Corporation. All rights reserved.
* Copyright (c) 2004, 2005 Intel Corporation. All rights reserved.
* Copyright (c) 2004, 2005 Topspin Corporation. All rights reserved.
* Copyright (c) 2004-2007 Voltaire Corporation. All rights reserved.
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
* Copyright (c) 2014 Intel Corporation. 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.
*
*/
#include <rdma/ib_smi.h>
#include "smi.h"
#include "opa_smi.h"
static enum smi_action __smi_handle_dr_smp_send(bool is_switch, int port_num,
u8 *hop_ptr, u8 hop_cnt,
const u8 *initial_path,
const u8 *return_path,
u8 direction,
bool dr_dlid_is_permissive,
bool dr_slid_is_permissive)
{
/* See section 14.2.2.2, Vol 1 IB spec */
/* C14-6 -- valid hop_cnt values are from 0 to 63 */
if (hop_cnt >= IB_SMP_MAX_PATH_HOPS)
return IB_SMI_DISCARD;
if (!direction) {
/* C14-9:1 */
if (hop_cnt && *hop_ptr == 0) {
(*hop_ptr)++;
return (initial_path[*hop_ptr] ==
port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
}
/* C14-9:2 */
if (*hop_ptr && *hop_ptr < hop_cnt) {
if (!is_switch)
return IB_SMI_DISCARD;
/* return_path set when received */
(*hop_ptr)++;
return (initial_path[*hop_ptr] ==
port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
}
/* C14-9:3 -- We're at the end of the DR segment of path */
if (*hop_ptr == hop_cnt) {
/* return_path set when received */
(*hop_ptr)++;
return (is_switch ||
dr_dlid_is_permissive ?
IB_SMI_HANDLE : IB_SMI_DISCARD);
}
/* C14-9:4 -- hop_ptr = hop_cnt + 1 -> give to SMA/SM */
/* C14-9:5 -- Fail unreasonable hop pointer */
return (*hop_ptr == hop_cnt + 1 ? IB_SMI_HANDLE : IB_SMI_DISCARD);
} else {
/* C14-13:1 */
if (hop_cnt && *hop_ptr == hop_cnt + 1) {
(*hop_ptr)--;
return (return_path[*hop_ptr] ==
port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
}
/* C14-13:2 */
if (2 <= *hop_ptr && *hop_ptr <= hop_cnt) {
if (!is_switch)
return IB_SMI_DISCARD;
(*hop_ptr)--;
return (return_path[*hop_ptr] ==
port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
}
/* C14-13:3 -- at the end of the DR segment of path */
if (*hop_ptr == 1) {
(*hop_ptr)--;
/* C14-13:3 -- SMPs destined for SM shouldn't be here */
return (is_switch ||
dr_slid_is_permissive ?
IB_SMI_HANDLE : IB_SMI_DISCARD);
}
/* C14-13:4 -- hop_ptr = 0 -> should have gone to SM */
if (*hop_ptr == 0)
return IB_SMI_HANDLE;
/* C14-13:5 -- Check for unreasonable hop pointer */
return IB_SMI_DISCARD;
}
}
/*
* Fixup a directed route SMP for sending
* Return IB_SMI_DISCARD if the SMP should be discarded
*/
enum smi_action smi_handle_dr_smp_send(struct ib_smp *smp,
bool is_switch, int port_num)
{
return __smi_handle_dr_smp_send(is_switch, port_num,
&smp->hop_ptr, smp->hop_cnt,
smp->initial_path,
smp->return_path,
ib_get_smp_direction(smp),
smp->dr_dlid == IB_LID_PERMISSIVE,
smp->dr_slid == IB_LID_PERMISSIVE);
}
enum smi_action opa_smi_handle_dr_smp_send(struct opa_smp *smp,
bool is_switch, int port_num)
{
return __smi_handle_dr_smp_send(is_switch, port_num,
&smp->hop_ptr, smp->hop_cnt,
smp->route.dr.initial_path,
smp->route.dr.return_path,
opa_get_smp_direction(smp),
smp->route.dr.dr_dlid ==
OPA_LID_PERMISSIVE,
smp->route.dr.dr_slid ==
OPA_LID_PERMISSIVE);
}
static enum smi_action __smi_handle_dr_smp_recv(bool is_switch, int port_num,
int phys_port_cnt,
u8 *hop_ptr, u8 hop_cnt,
const u8 *initial_path,
u8 *return_path,
u8 direction,
bool dr_dlid_is_permissive,
bool dr_slid_is_permissive)
{
/* See section 14.2.2.2, Vol 1 IB spec */
/* C14-6 -- valid hop_cnt values are from 0 to 63 */
if (hop_cnt >= IB_SMP_MAX_PATH_HOPS)
return IB_SMI_DISCARD;
if (!direction) {
/* C14-9:1 -- sender should have incremented hop_ptr */
if (hop_cnt && *hop_ptr == 0)
return IB_SMI_DISCARD;
/* C14-9:2 -- intermediate hop */
if (*hop_ptr && *hop_ptr < hop_cnt) {
if (!is_switch)
return IB_SMI_DISCARD;
return_path[*hop_ptr] = port_num;
/* hop_ptr updated when sending */
return (initial_path[*hop_ptr+1] <= phys_port_cnt ?
IB_SMI_HANDLE : IB_SMI_DISCARD);
}
/* C14-9:3 -- We're at the end of the DR segment of path */
if (*hop_ptr == hop_cnt) {
if (hop_cnt)
return_path[*hop_ptr] = port_num;
/* hop_ptr updated when sending */
return (is_switch ||
dr_dlid_is_permissive ?
IB_SMI_HANDLE : IB_SMI_DISCARD);
}
/* C14-9:4 -- hop_ptr = hop_cnt + 1 -> give to SMA/SM */
/* C14-9:5 -- fail unreasonable hop pointer */
return (*hop_ptr == hop_cnt + 1 ? IB_SMI_HANDLE : IB_SMI_DISCARD);
} else {
/* C14-13:1 */
if (hop_cnt && *hop_ptr == hop_cnt + 1) {
(*hop_ptr)--;
return (return_path[*hop_ptr] ==
port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
}
/* C14-13:2 */
if (2 <= *hop_ptr && *hop_ptr <= hop_cnt) {
if (!is_switch)
return IB_SMI_DISCARD;
/* hop_ptr updated when sending */
return (return_path[*hop_ptr-1] <= phys_port_cnt ?
IB_SMI_HANDLE : IB_SMI_DISCARD);
}
/* C14-13:3 -- We're at the end of the DR segment of path */
if (*hop_ptr == 1) {
if (dr_slid_is_permissive) {
/* giving SMP to SM - update hop_ptr */
(*hop_ptr)--;
return IB_SMI_HANDLE;
}
/* hop_ptr updated when sending */
return (is_switch ? IB_SMI_HANDLE : IB_SMI_DISCARD);
}
/* C14-13:4 -- hop_ptr = 0 -> give to SM */
/* C14-13:5 -- Check for unreasonable hop pointer */
return (*hop_ptr == 0 ? IB_SMI_HANDLE : IB_SMI_DISCARD);
}
}
/*
* Adjust information for a received SMP
* Return IB_SMI_DISCARD if the SMP should be dropped
*/
enum smi_action smi_handle_dr_smp_recv(struct ib_smp *smp, bool is_switch,
int port_num, int phys_port_cnt)
{
return __smi_handle_dr_smp_recv(is_switch, port_num, phys_port_cnt,
&smp->hop_ptr, smp->hop_cnt,
smp->initial_path,
smp->return_path,
ib_get_smp_direction(smp),
smp->dr_dlid == IB_LID_PERMISSIVE,
smp->dr_slid == IB_LID_PERMISSIVE);
}
/*
* Adjust information for a received SMP
* Return IB_SMI_DISCARD if the SMP should be dropped
*/
enum smi_action opa_smi_handle_dr_smp_recv(struct opa_smp *smp, bool is_switch,
int port_num, int phys_port_cnt)
{
return __smi_handle_dr_smp_recv(is_switch, port_num, phys_port_cnt,
&smp->hop_ptr, smp->hop_cnt,
smp->route.dr.initial_path,
smp->route.dr.return_path,
opa_get_smp_direction(smp),
smp->route.dr.dr_dlid ==
OPA_LID_PERMISSIVE,
smp->route.dr.dr_slid ==
OPA_LID_PERMISSIVE);
}
static enum smi_forward_action __smi_check_forward_dr_smp(u8 hop_ptr, u8 hop_cnt,
u8 direction,
bool dr_dlid_is_permissive,
bool dr_slid_is_permissive)
{
if (!direction) {
/* C14-9:2 -- intermediate hop */
if (hop_ptr && hop_ptr < hop_cnt)
return IB_SMI_FORWARD;
/* C14-9:3 -- at the end of the DR segment of path */
if (hop_ptr == hop_cnt)
return (dr_dlid_is_permissive ?
IB_SMI_SEND : IB_SMI_LOCAL);
/* C14-9:4 -- hop_ptr = hop_cnt + 1 -> give to SMA/SM */
if (hop_ptr == hop_cnt + 1)
return IB_SMI_SEND;
} else {
/* C14-13:2 -- intermediate hop */
if (2 <= hop_ptr && hop_ptr <= hop_cnt)
return IB_SMI_FORWARD;
/* C14-13:3 -- at the end of the DR segment of path */
if (hop_ptr == 1)
return (!dr_slid_is_permissive ?
IB_SMI_SEND : IB_SMI_LOCAL);
}
return IB_SMI_LOCAL;
}
enum smi_forward_action smi_check_forward_dr_smp(struct ib_smp *smp)
{
return __smi_check_forward_dr_smp(smp->hop_ptr, smp->hop_cnt,
ib_get_smp_direction(smp),
smp->dr_dlid == IB_LID_PERMISSIVE,
smp->dr_slid == IB_LID_PERMISSIVE);
}
enum smi_forward_action opa_smi_check_forward_dr_smp(struct opa_smp *smp)
{
return __smi_check_forward_dr_smp(smp->hop_ptr, smp->hop_cnt,
opa_get_smp_direction(smp),
smp->route.dr.dr_dlid ==
OPA_LID_PERMISSIVE,
smp->route.dr.dr_slid ==
OPA_LID_PERMISSIVE);
}
/*
* Return the forwarding port number from initial_path for outgoing SMP and
* from return_path for returning SMP
*/
int smi_get_fwd_port(struct ib_smp *smp)
{
return (!ib_get_smp_direction(smp) ? smp->initial_path[smp->hop_ptr+1] :
smp->return_path[smp->hop_ptr-1]);
}
/*
* Return the forwarding port number from initial_path for outgoing SMP and
* from return_path for returning SMP
*/
int opa_smi_get_fwd_port(struct opa_smp *smp)
{
return !opa_get_smp_direction(smp) ? smp->route.dr.initial_path[smp->hop_ptr+1] :
smp->route.dr.return_path[smp->hop_ptr-1];
}
|
