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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / infiniband / core / sa_query.c
blob30d4c126a2db0bab7ab5be4b9824286daf3879ce
1 /*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
4 * Copyright (c) 2006 Intel Corporation. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35 #include <linux/module.h>
36 #include <linux/init.h>
37 #include <linux/err.h>
38 #include <linux/random.h>
39 #include <linux/spinlock.h>
40 #include <linux/slab.h>
41 #include <linux/dma-mapping.h>
42 #include <linux/kref.h>
43 #include <linux/xarray.h>
44 #include <linux/workqueue.h>
45 #include <uapi/linux/if_ether.h>
46 #include <rdma/ib_pack.h>
47 #include <rdma/ib_cache.h>
48 #include <rdma/rdma_netlink.h>
49 #include <net/netlink.h>
50 #include <uapi/rdma/ib_user_sa.h>
51 #include <rdma/ib_marshall.h>
52 #include <rdma/ib_addr.h>
53 #include <rdma/opa_addr.h>
54 #include "sa.h"
55 #include "core_priv.h"
56
57 #define IB_SA_LOCAL_SVC_TIMEOUT_MIN 100
58 #define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT 2000
59 #define IB_SA_LOCAL_SVC_TIMEOUT_MAX 200000
60 #define IB_SA_CPI_MAX_RETRY_CNT 3
61 #define IB_SA_CPI_RETRY_WAIT 1000 /*msecs */
62 static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT;
63
64 struct ib_sa_sm_ah {
65 struct ib_ah *ah;
66 struct kref ref;
67 u16 pkey_index;
68 u8 src_path_mask;
69 };
70
71 enum rdma_class_port_info_type {
72 RDMA_CLASS_PORT_INFO_IB,
73 RDMA_CLASS_PORT_INFO_OPA
74 };
75
76 struct rdma_class_port_info {
77 enum rdma_class_port_info_type type;
78 union {
79 struct ib_class_port_info ib;
80 struct opa_class_port_info opa;
81 };
82 };
83
84 struct ib_sa_classport_cache {
85 bool valid;
86 int retry_cnt;
87 struct rdma_class_port_info data;
88 };
89
90 struct ib_sa_port {
91 struct ib_mad_agent *agent;
92 struct ib_sa_sm_ah *sm_ah;
93 struct work_struct update_task;
94 struct ib_sa_classport_cache classport_info;
95 struct delayed_work ib_cpi_work;
96 spinlock_t classport_lock; /* protects class port info set */
97 spinlock_t ah_lock;
98 u8 port_num;
99 };
100
101 struct ib_sa_device {
102 int start_port, end_port;
103 struct ib_event_handler event_handler;
104 struct ib_sa_port port[0];
105 };
106
107 struct ib_sa_query {
108 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
109 void (*release)(struct ib_sa_query *);
110 struct ib_sa_client *client;
111 struct ib_sa_port *port;
112 struct ib_mad_send_buf *mad_buf;
113 struct ib_sa_sm_ah *sm_ah;
114 int id;
115 u32 flags;
116 struct list_head list; /* Local svc request list */
117 u32 seq; /* Local svc request sequence number */
118 unsigned long timeout; /* Local svc timeout */
119 u8 path_use; /* How will the pathrecord be used */
120 };
121
122 #define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001
123 #define IB_SA_CANCEL 0x00000002
124 #define IB_SA_QUERY_OPA 0x00000004
125
126 struct ib_sa_service_query {
127 void (*callback)(int, struct ib_sa_service_rec *, void *);
128 void *context;
129 struct ib_sa_query sa_query;
130 };
131
132 struct ib_sa_path_query {
133 void (*callback)(int, struct sa_path_rec *, void *);
134 void *context;
135 struct ib_sa_query sa_query;
136 struct sa_path_rec *conv_pr;
137 };
138
139 struct ib_sa_guidinfo_query {
140 void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
141 void *context;
142 struct ib_sa_query sa_query;
143 };
144
145 struct ib_sa_classport_info_query {
146 void (*callback)(void *);
147 void *context;
148 struct ib_sa_query sa_query;
149 };
150
151 struct ib_sa_mcmember_query {
152 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
153 void *context;
154 struct ib_sa_query sa_query;
155 };
156
157 static LIST_HEAD(ib_nl_request_list);
158 static DEFINE_SPINLOCK(ib_nl_request_lock);
159 static atomic_t ib_nl_sa_request_seq;
160 static struct workqueue_struct *ib_nl_wq;
161 static struct delayed_work ib_nl_timed_work;
162 static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = {
163 [LS_NLA_TYPE_PATH_RECORD] = {.type = NLA_BINARY,
164 .len = sizeof(struct ib_path_rec_data)},
165 [LS_NLA_TYPE_TIMEOUT] = {.type = NLA_U32},
166 [LS_NLA_TYPE_SERVICE_ID] = {.type = NLA_U64},
167 [LS_NLA_TYPE_DGID] = {.type = NLA_BINARY,
168 .len = sizeof(struct rdma_nla_ls_gid)},
169 [LS_NLA_TYPE_SGID] = {.type = NLA_BINARY,
170 .len = sizeof(struct rdma_nla_ls_gid)},
171 [LS_NLA_TYPE_TCLASS] = {.type = NLA_U8},
172 [LS_NLA_TYPE_PKEY] = {.type = NLA_U16},
173 [LS_NLA_TYPE_QOS_CLASS] = {.type = NLA_U16},
174 };
175
176
177 static void ib_sa_add_one(struct ib_device *device);
178 static void ib_sa_remove_one(struct ib_device *device, void *client_data);
179
180 static struct ib_client sa_client = {
181 .name = "sa",
182 .add = ib_sa_add_one,
183 .remove = ib_sa_remove_one
184 };
185
186 static DEFINE_XARRAY_FLAGS(queries, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
187
188 static DEFINE_SPINLOCK(tid_lock);
189 static u32 tid;
190
191 #define PATH_REC_FIELD(field) \
192 .struct_offset_bytes = offsetof(struct sa_path_rec, field), \
193 .struct_size_bytes = sizeof((struct sa_path_rec *)0)->field, \
194 .field_name = "sa_path_rec:" #field
195
196 static const struct ib_field path_rec_table[] = {
197 { PATH_REC_FIELD(service_id),
198 .offset_words = 0,
199 .offset_bits = 0,
200 .size_bits = 64 },
201 { PATH_REC_FIELD(dgid),
202 .offset_words = 2,
203 .offset_bits = 0,
204 .size_bits = 128 },
205 { PATH_REC_FIELD(sgid),
206 .offset_words = 6,
207 .offset_bits = 0,
208 .size_bits = 128 },
209 { PATH_REC_FIELD(ib.dlid),
210 .offset_words = 10,
211 .offset_bits = 0,
212 .size_bits = 16 },
213 { PATH_REC_FIELD(ib.slid),
214 .offset_words = 10,
215 .offset_bits = 16,
216 .size_bits = 16 },
217 { PATH_REC_FIELD(ib.raw_traffic),
218 .offset_words = 11,
219 .offset_bits = 0,
220 .size_bits = 1 },
221 { RESERVED,
222 .offset_words = 11,
223 .offset_bits = 1,
224 .size_bits = 3 },
225 { PATH_REC_FIELD(flow_label),
226 .offset_words = 11,
227 .offset_bits = 4,
228 .size_bits = 20 },
229 { PATH_REC_FIELD(hop_limit),
230 .offset_words = 11,
231 .offset_bits = 24,
232 .size_bits = 8 },
233 { PATH_REC_FIELD(traffic_class),
234 .offset_words = 12,
235 .offset_bits = 0,
236 .size_bits = 8 },
237 { PATH_REC_FIELD(reversible),
238 .offset_words = 12,
239 .offset_bits = 8,
240 .size_bits = 1 },
241 { PATH_REC_FIELD(numb_path),
242 .offset_words = 12,
243 .offset_bits = 9,
244 .size_bits = 7 },
245 { PATH_REC_FIELD(pkey),
246 .offset_words = 12,
247 .offset_bits = 16,
248 .size_bits = 16 },
249 { PATH_REC_FIELD(qos_class),
250 .offset_words = 13,
251 .offset_bits = 0,
252 .size_bits = 12 },
253 { PATH_REC_FIELD(sl),
254 .offset_words = 13,
255 .offset_bits = 12,
256 .size_bits = 4 },
257 { PATH_REC_FIELD(mtu_selector),
258 .offset_words = 13,
259 .offset_bits = 16,
260 .size_bits = 2 },
261 { PATH_REC_FIELD(mtu),
262 .offset_words = 13,
263 .offset_bits = 18,
264 .size_bits = 6 },
265 { PATH_REC_FIELD(rate_selector),
266 .offset_words = 13,
267 .offset_bits = 24,
268 .size_bits = 2 },
269 { PATH_REC_FIELD(rate),
270 .offset_words = 13,
271 .offset_bits = 26,
272 .size_bits = 6 },
273 { PATH_REC_FIELD(packet_life_time_selector),
274 .offset_words = 14,
275 .offset_bits = 0,
276 .size_bits = 2 },
277 { PATH_REC_FIELD(packet_life_time),
278 .offset_words = 14,
279 .offset_bits = 2,
280 .size_bits = 6 },
281 { PATH_REC_FIELD(preference),
282 .offset_words = 14,
283 .offset_bits = 8,
284 .size_bits = 8 },
285 { RESERVED,
286 .offset_words = 14,
287 .offset_bits = 16,
288 .size_bits = 48 },
289 };
290
291 #define OPA_PATH_REC_FIELD(field) \
292 .struct_offset_bytes = \
293 offsetof(struct sa_path_rec, field), \
294 .struct_size_bytes = \
295 sizeof((struct sa_path_rec *)0)->field, \
296 .field_name = "sa_path_rec:" #field
297
298 static const struct ib_field opa_path_rec_table[] = {
299 { OPA_PATH_REC_FIELD(service_id),
300 .offset_words = 0,
301 .offset_bits = 0,
302 .size_bits = 64 },
303 { OPA_PATH_REC_FIELD(dgid),
304 .offset_words = 2,
305 .offset_bits = 0,
306 .size_bits = 128 },
307 { OPA_PATH_REC_FIELD(sgid),
308 .offset_words = 6,
309 .offset_bits = 0,
310 .size_bits = 128 },
311 { OPA_PATH_REC_FIELD(opa.dlid),
312 .offset_words = 10,
313 .offset_bits = 0,
314 .size_bits = 32 },
315 { OPA_PATH_REC_FIELD(opa.slid),
316 .offset_words = 11,
317 .offset_bits = 0,
318 .size_bits = 32 },
319 { OPA_PATH_REC_FIELD(opa.raw_traffic),
320 .offset_words = 12,
321 .offset_bits = 0,
322 .size_bits = 1 },
323 { RESERVED,
324 .offset_words = 12,
325 .offset_bits = 1,
326 .size_bits = 3 },
327 { OPA_PATH_REC_FIELD(flow_label),
328 .offset_words = 12,
329 .offset_bits = 4,
330 .size_bits = 20 },
331 { OPA_PATH_REC_FIELD(hop_limit),
332 .offset_words = 12,
333 .offset_bits = 24,
334 .size_bits = 8 },
335 { OPA_PATH_REC_FIELD(traffic_class),
336 .offset_words = 13,
337 .offset_bits = 0,
338 .size_bits = 8 },
339 { OPA_PATH_REC_FIELD(reversible),
340 .offset_words = 13,
341 .offset_bits = 8,
342 .size_bits = 1 },
343 { OPA_PATH_REC_FIELD(numb_path),
344 .offset_words = 13,
345 .offset_bits = 9,
346 .size_bits = 7 },
347 { OPA_PATH_REC_FIELD(pkey),
348 .offset_words = 13,
349 .offset_bits = 16,
350 .size_bits = 16 },
351 { OPA_PATH_REC_FIELD(opa.l2_8B),
352 .offset_words = 14,
353 .offset_bits = 0,
354 .size_bits = 1 },
355 { OPA_PATH_REC_FIELD(opa.l2_10B),
356 .offset_words = 14,
357 .offset_bits = 1,
358 .size_bits = 1 },
359 { OPA_PATH_REC_FIELD(opa.l2_9B),
360 .offset_words = 14,
361 .offset_bits = 2,
362 .size_bits = 1 },
363 { OPA_PATH_REC_FIELD(opa.l2_16B),
364 .offset_words = 14,
365 .offset_bits = 3,
366 .size_bits = 1 },
367 { RESERVED,
368 .offset_words = 14,
369 .offset_bits = 4,
370 .size_bits = 2 },
371 { OPA_PATH_REC_FIELD(opa.qos_type),
372 .offset_words = 14,
373 .offset_bits = 6,
374 .size_bits = 2 },
375 { OPA_PATH_REC_FIELD(opa.qos_priority),
376 .offset_words = 14,
377 .offset_bits = 8,
378 .size_bits = 8 },
379 { RESERVED,
380 .offset_words = 14,
381 .offset_bits = 16,
382 .size_bits = 3 },
383 { OPA_PATH_REC_FIELD(sl),
384 .offset_words = 14,
385 .offset_bits = 19,
386 .size_bits = 5 },
387 { RESERVED,
388 .offset_words = 14,
389 .offset_bits = 24,
390 .size_bits = 8 },
391 { OPA_PATH_REC_FIELD(mtu_selector),
392 .offset_words = 15,
393 .offset_bits = 0,
394 .size_bits = 2 },
395 { OPA_PATH_REC_FIELD(mtu),
396 .offset_words = 15,
397 .offset_bits = 2,
398 .size_bits = 6 },
399 { OPA_PATH_REC_FIELD(rate_selector),
400 .offset_words = 15,
401 .offset_bits = 8,
402 .size_bits = 2 },
403 { OPA_PATH_REC_FIELD(rate),
404 .offset_words = 15,
405 .offset_bits = 10,
406 .size_bits = 6 },
407 { OPA_PATH_REC_FIELD(packet_life_time_selector),
408 .offset_words = 15,
409 .offset_bits = 16,
410 .size_bits = 2 },
411 { OPA_PATH_REC_FIELD(packet_life_time),
412 .offset_words = 15,
413 .offset_bits = 18,
414 .size_bits = 6 },
415 { OPA_PATH_REC_FIELD(preference),
416 .offset_words = 15,
417 .offset_bits = 24,
418 .size_bits = 8 },
419 };
420
421 #define MCMEMBER_REC_FIELD(field) \
422 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
423 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
424 .field_name = "sa_mcmember_rec:" #field
425
426 static const struct ib_field mcmember_rec_table[] = {
427 { MCMEMBER_REC_FIELD(mgid),
428 .offset_words = 0,
429 .offset_bits = 0,
430 .size_bits = 128 },
431 { MCMEMBER_REC_FIELD(port_gid),
432 .offset_words = 4,
433 .offset_bits = 0,
434 .size_bits = 128 },
435 { MCMEMBER_REC_FIELD(qkey),
436 .offset_words = 8,
437 .offset_bits = 0,
438 .size_bits = 32 },
439 { MCMEMBER_REC_FIELD(mlid),
440 .offset_words = 9,
441 .offset_bits = 0,
442 .size_bits = 16 },
443 { MCMEMBER_REC_FIELD(mtu_selector),
444 .offset_words = 9,
445 .offset_bits = 16,
446 .size_bits = 2 },
447 { MCMEMBER_REC_FIELD(mtu),
448 .offset_words = 9,
449 .offset_bits = 18,
450 .size_bits = 6 },
451 { MCMEMBER_REC_FIELD(traffic_class),
452 .offset_words = 9,
453 .offset_bits = 24,
454 .size_bits = 8 },
455 { MCMEMBER_REC_FIELD(pkey),
456 .offset_words = 10,
457 .offset_bits = 0,
458 .size_bits = 16 },
459 { MCMEMBER_REC_FIELD(rate_selector),
460 .offset_words = 10,
461 .offset_bits = 16,
462 .size_bits = 2 },
463 { MCMEMBER_REC_FIELD(rate),
464 .offset_words = 10,
465 .offset_bits = 18,
466 .size_bits = 6 },
467 { MCMEMBER_REC_FIELD(packet_life_time_selector),
468 .offset_words = 10,
469 .offset_bits = 24,
470 .size_bits = 2 },
471 { MCMEMBER_REC_FIELD(packet_life_time),
472 .offset_words = 10,
473 .offset_bits = 26,
474 .size_bits = 6 },
475 { MCMEMBER_REC_FIELD(sl),
476 .offset_words = 11,
477 .offset_bits = 0,
478 .size_bits = 4 },
479 { MCMEMBER_REC_FIELD(flow_label),
480 .offset_words = 11,
481 .offset_bits = 4,
482 .size_bits = 20 },
483 { MCMEMBER_REC_FIELD(hop_limit),
484 .offset_words = 11,
485 .offset_bits = 24,
486 .size_bits = 8 },
487 { MCMEMBER_REC_FIELD(scope),
488 .offset_words = 12,
489 .offset_bits = 0,
490 .size_bits = 4 },
491 { MCMEMBER_REC_FIELD(join_state),
492 .offset_words = 12,
493 .offset_bits = 4,
494 .size_bits = 4 },
495 { MCMEMBER_REC_FIELD(proxy_join),
496 .offset_words = 12,
497 .offset_bits = 8,
498 .size_bits = 1 },
499 { RESERVED,
500 .offset_words = 12,
501 .offset_bits = 9,
502 .size_bits = 23 },
503 };
504
505 #define SERVICE_REC_FIELD(field) \
506 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
507 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
508 .field_name = "sa_service_rec:" #field
509
510 static const struct ib_field service_rec_table[] = {
511 { SERVICE_REC_FIELD(id),
512 .offset_words = 0,
513 .offset_bits = 0,
514 .size_bits = 64 },
515 { SERVICE_REC_FIELD(gid),
516 .offset_words = 2,
517 .offset_bits = 0,
518 .size_bits = 128 },
519 { SERVICE_REC_FIELD(pkey),
520 .offset_words = 6,
521 .offset_bits = 0,
522 .size_bits = 16 },
523 { SERVICE_REC_FIELD(lease),
524 .offset_words = 7,
525 .offset_bits = 0,
526 .size_bits = 32 },
527 { SERVICE_REC_FIELD(key),
528 .offset_words = 8,
529 .offset_bits = 0,
530 .size_bits = 128 },
531 { SERVICE_REC_FIELD(name),
532 .offset_words = 12,
533 .offset_bits = 0,
534 .size_bits = 64*8 },
535 { SERVICE_REC_FIELD(data8),
536 .offset_words = 28,
537 .offset_bits = 0,
538 .size_bits = 16*8 },
539 { SERVICE_REC_FIELD(data16),
540 .offset_words = 32,
541 .offset_bits = 0,
542 .size_bits = 8*16 },
543 { SERVICE_REC_FIELD(data32),
544 .offset_words = 36,
545 .offset_bits = 0,
546 .size_bits = 4*32 },
547 { SERVICE_REC_FIELD(data64),
548 .offset_words = 40,
549 .offset_bits = 0,
550 .size_bits = 2*64 },
551 };
552
553 #define CLASSPORTINFO_REC_FIELD(field) \
554 .struct_offset_bytes = offsetof(struct ib_class_port_info, field), \
555 .struct_size_bytes = sizeof((struct ib_class_port_info *)0)->field, \
556 .field_name = "ib_class_port_info:" #field
557
558 static const struct ib_field ib_classport_info_rec_table[] = {
559 { CLASSPORTINFO_REC_FIELD(base_version),
560 .offset_words = 0,
561 .offset_bits = 0,
562 .size_bits = 8 },
563 { CLASSPORTINFO_REC_FIELD(class_version),
564 .offset_words = 0,
565 .offset_bits = 8,
566 .size_bits = 8 },
567 { CLASSPORTINFO_REC_FIELD(capability_mask),
568 .offset_words = 0,
569 .offset_bits = 16,
570 .size_bits = 16 },
571 { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
572 .offset_words = 1,
573 .offset_bits = 0,
574 .size_bits = 32 },
575 { CLASSPORTINFO_REC_FIELD(redirect_gid),
576 .offset_words = 2,
577 .offset_bits = 0,
578 .size_bits = 128 },
579 { CLASSPORTINFO_REC_FIELD(redirect_tcslfl),
580 .offset_words = 6,
581 .offset_bits = 0,
582 .size_bits = 32 },
583 { CLASSPORTINFO_REC_FIELD(redirect_lid),
584 .offset_words = 7,
585 .offset_bits = 0,
586 .size_bits = 16 },
587 { CLASSPORTINFO_REC_FIELD(redirect_pkey),
588 .offset_words = 7,
589 .offset_bits = 16,
590 .size_bits = 16 },
591
592 { CLASSPORTINFO_REC_FIELD(redirect_qp),
593 .offset_words = 8,
594 .offset_bits = 0,
595 .size_bits = 32 },
596 { CLASSPORTINFO_REC_FIELD(redirect_qkey),
597 .offset_words = 9,
598 .offset_bits = 0,
599 .size_bits = 32 },
600
601 { CLASSPORTINFO_REC_FIELD(trap_gid),
602 .offset_words = 10,
603 .offset_bits = 0,
604 .size_bits = 128 },
605 { CLASSPORTINFO_REC_FIELD(trap_tcslfl),
606 .offset_words = 14,
607 .offset_bits = 0,
608 .size_bits = 32 },
609
610 { CLASSPORTINFO_REC_FIELD(trap_lid),
611 .offset_words = 15,
612 .offset_bits = 0,
613 .size_bits = 16 },
614 { CLASSPORTINFO_REC_FIELD(trap_pkey),
615 .offset_words = 15,
616 .offset_bits = 16,
617 .size_bits = 16 },
618
619 { CLASSPORTINFO_REC_FIELD(trap_hlqp),
620 .offset_words = 16,
621 .offset_bits = 0,
622 .size_bits = 32 },
623 { CLASSPORTINFO_REC_FIELD(trap_qkey),
624 .offset_words = 17,
625 .offset_bits = 0,
626 .size_bits = 32 },
627 };
628
629 #define OPA_CLASSPORTINFO_REC_FIELD(field) \
630 .struct_offset_bytes =\
631 offsetof(struct opa_class_port_info, field), \
632 .struct_size_bytes = \
633 sizeof((struct opa_class_port_info *)0)->field, \
634 .field_name = "opa_class_port_info:" #field
635
636 static const struct ib_field opa_classport_info_rec_table[] = {
637 { OPA_CLASSPORTINFO_REC_FIELD(base_version),
638 .offset_words = 0,
639 .offset_bits = 0,
640 .size_bits = 8 },
641 { OPA_CLASSPORTINFO_REC_FIELD(class_version),
642 .offset_words = 0,
643 .offset_bits = 8,
644 .size_bits = 8 },
645 { OPA_CLASSPORTINFO_REC_FIELD(cap_mask),
646 .offset_words = 0,
647 .offset_bits = 16,
648 .size_bits = 16 },
649 { OPA_CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
650 .offset_words = 1,
651 .offset_bits = 0,
652 .size_bits = 32 },
653 { OPA_CLASSPORTINFO_REC_FIELD(redirect_gid),
654 .offset_words = 2,
655 .offset_bits = 0,
656 .size_bits = 128 },
657 { OPA_CLASSPORTINFO_REC_FIELD(redirect_tc_fl),
658 .offset_words = 6,
659 .offset_bits = 0,
660 .size_bits = 32 },
661 { OPA_CLASSPORTINFO_REC_FIELD(redirect_lid),
662 .offset_words = 7,
663 .offset_bits = 0,
664 .size_bits = 32 },
665 { OPA_CLASSPORTINFO_REC_FIELD(redirect_sl_qp),
666 .offset_words = 8,
667 .offset_bits = 0,
668 .size_bits = 32 },
669 { OPA_CLASSPORTINFO_REC_FIELD(redirect_qkey),
670 .offset_words = 9,
671 .offset_bits = 0,
672 .size_bits = 32 },
673 { OPA_CLASSPORTINFO_REC_FIELD(trap_gid),
674 .offset_words = 10,
675 .offset_bits = 0,
676 .size_bits = 128 },
677 { OPA_CLASSPORTINFO_REC_FIELD(trap_tc_fl),
678 .offset_words = 14,
679 .offset_bits = 0,
680 .size_bits = 32 },
681 { OPA_CLASSPORTINFO_REC_FIELD(trap_lid),
682 .offset_words = 15,
683 .offset_bits = 0,
684 .size_bits = 32 },
685 { OPA_CLASSPORTINFO_REC_FIELD(trap_hl_qp),
686 .offset_words = 16,
687 .offset_bits = 0,
688 .size_bits = 32 },
689 { OPA_CLASSPORTINFO_REC_FIELD(trap_qkey),
690 .offset_words = 17,
691 .offset_bits = 0,
692 .size_bits = 32 },
693 { OPA_CLASSPORTINFO_REC_FIELD(trap_pkey),
694 .offset_words = 18,
695 .offset_bits = 0,
696 .size_bits = 16 },
697 { OPA_CLASSPORTINFO_REC_FIELD(redirect_pkey),
698 .offset_words = 18,
699 .offset_bits = 16,
700 .size_bits = 16 },
701 { OPA_CLASSPORTINFO_REC_FIELD(trap_sl_rsvd),
702 .offset_words = 19,
703 .offset_bits = 0,
704 .size_bits = 8 },
705 { RESERVED,
706 .offset_words = 19,
707 .offset_bits = 8,
708 .size_bits = 24 },
709 };
710
711 #define GUIDINFO_REC_FIELD(field) \
712 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \
713 .struct_size_bytes = sizeof((struct ib_sa_guidinfo_rec *) 0)->field, \
714 .field_name = "sa_guidinfo_rec:" #field
715
716 static const struct ib_field guidinfo_rec_table[] = {
717 { GUIDINFO_REC_FIELD(lid),
718 .offset_words = 0,
719 .offset_bits = 0,
720 .size_bits = 16 },
721 { GUIDINFO_REC_FIELD(block_num),
722 .offset_words = 0,
723 .offset_bits = 16,
724 .size_bits = 8 },
725 { GUIDINFO_REC_FIELD(res1),
726 .offset_words = 0,
727 .offset_bits = 24,
728 .size_bits = 8 },
729 { GUIDINFO_REC_FIELD(res2),
730 .offset_words = 1,
731 .offset_bits = 0,
732 .size_bits = 32 },
733 { GUIDINFO_REC_FIELD(guid_info_list),
734 .offset_words = 2,
735 .offset_bits = 0,
736 .size_bits = 512 },
737 };
738
739 static inline void ib_sa_disable_local_svc(struct ib_sa_query *query)
740 {
741 query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE;
742 }
743
744 static inline int ib_sa_query_cancelled(struct ib_sa_query *query)
745 {
746 return (query->flags & IB_SA_CANCEL);
747 }
748
749 static void ib_nl_set_path_rec_attrs(struct sk_buff *skb,
750 struct ib_sa_query *query)
751 {
752 struct sa_path_rec *sa_rec = query->mad_buf->context[1];
753 struct ib_sa_mad *mad = query->mad_buf->mad;
754 ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask;
755 u16 val16;
756 u64 val64;
757 struct rdma_ls_resolve_header *header;
758
759 query->mad_buf->context[1] = NULL;
760
761 /* Construct the family header first */
762 header = skb_put(skb, NLMSG_ALIGN(sizeof(*header)));
763 memcpy(header->device_name, dev_name(&query->port->agent->device->dev),
764 LS_DEVICE_NAME_MAX);
765 header->port_num = query->port->port_num;
766
767 if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) &&
768 sa_rec->reversible != 0)
769 query->path_use = LS_RESOLVE_PATH_USE_GMP;
770 else
771 query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL;
772 header->path_use = query->path_use;
773
774 /* Now build the attributes */
775 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) {
776 val64 = be64_to_cpu(sa_rec->service_id);
777 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID,
778 sizeof(val64), &val64);
779 }
780 if (comp_mask & IB_SA_PATH_REC_DGID)
781 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID,
782 sizeof(sa_rec->dgid), &sa_rec->dgid);
783 if (comp_mask & IB_SA_PATH_REC_SGID)
784 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID,
785 sizeof(sa_rec->sgid), &sa_rec->sgid);
786 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
787 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS,
788 sizeof(sa_rec->traffic_class), &sa_rec->traffic_class);
789
790 if (comp_mask & IB_SA_PATH_REC_PKEY) {
791 val16 = be16_to_cpu(sa_rec->pkey);
792 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY,
793 sizeof(val16), &val16);
794 }
795 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) {
796 val16 = be16_to_cpu(sa_rec->qos_class);
797 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS,
798 sizeof(val16), &val16);
799 }
800 }
801
802 static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask)
803 {
804 int len = 0;
805
806 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID)
807 len += nla_total_size(sizeof(u64));
808 if (comp_mask & IB_SA_PATH_REC_DGID)
809 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
810 if (comp_mask & IB_SA_PATH_REC_SGID)
811 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
812 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
813 len += nla_total_size(sizeof(u8));
814 if (comp_mask & IB_SA_PATH_REC_PKEY)
815 len += nla_total_size(sizeof(u16));
816 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS)
817 len += nla_total_size(sizeof(u16));
818
819 /*
820 * Make sure that at least some of the required comp_mask bits are
821 * set.
822 */
823 if (WARN_ON(len == 0))
824 return len;
825
826 /* Add the family header */
827 len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header));
828
829 return len;
830 }
831
832 static int ib_nl_send_msg(struct ib_sa_query *query, gfp_t gfp_mask)
833 {
834 struct sk_buff *skb = NULL;
835 struct nlmsghdr *nlh;
836 void *data;
837 struct ib_sa_mad *mad;
838 int len;
839
840 mad = query->mad_buf->mad;
841 len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask);
842 if (len <= 0)
843 return -EMSGSIZE;
844
845 skb = nlmsg_new(len, gfp_mask);
846 if (!skb)
847 return -ENOMEM;
848
849 /* Put nlmsg header only for now */
850 data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS,
851 RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST);
852 if (!data) {
853 nlmsg_free(skb);
854 return -EMSGSIZE;
855 }
856
857 /* Add attributes */
858 ib_nl_set_path_rec_attrs(skb, query);
859
860 /* Repair the nlmsg header length */
861 nlmsg_end(skb, nlh);
862
863 return rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_LS, gfp_mask);
864 }
865
866 static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
867 {
868 unsigned long flags;
869 unsigned long delay;
870 int ret;
871
872 INIT_LIST_HEAD(&query->list);
873 query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq);
874
875 /* Put the request on the list first.*/
876 spin_lock_irqsave(&ib_nl_request_lock, flags);
877 delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
878 query->timeout = delay + jiffies;
879 list_add_tail(&query->list, &ib_nl_request_list);
880 /* Start the timeout if this is the only request */
881 if (ib_nl_request_list.next == &query->list)
882 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
883 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
884
885 ret = ib_nl_send_msg(query, gfp_mask);
886 if (ret) {
887 ret = -EIO;
888 /* Remove the request */
889 spin_lock_irqsave(&ib_nl_request_lock, flags);
890 list_del(&query->list);
891 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
892 }
893
894 return ret;
895 }
896
897 static int ib_nl_cancel_request(struct ib_sa_query *query)
898 {
899 unsigned long flags;
900 struct ib_sa_query *wait_query;
901 int found = 0;
902
903 spin_lock_irqsave(&ib_nl_request_lock, flags);
904 list_for_each_entry(wait_query, &ib_nl_request_list, list) {
905 /* Let the timeout to take care of the callback */
906 if (query == wait_query) {
907 query->flags |= IB_SA_CANCEL;
908 query->timeout = jiffies;
909 list_move(&query->list, &ib_nl_request_list);
910 found = 1;
911 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1);
912 break;
913 }
914 }
915 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
916
917 return found;
918 }
919
920 static void send_handler(struct ib_mad_agent *agent,
921 struct ib_mad_send_wc *mad_send_wc);
922
923 static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
924 const struct nlmsghdr *nlh)
925 {
926 struct ib_mad_send_wc mad_send_wc;
927 struct ib_sa_mad *mad = NULL;
928 const struct nlattr *head, *curr;
929 struct ib_path_rec_data *rec;
930 int len, rem;
931 u32 mask = 0;
932 int status = -EIO;
933
934 if (query->callback) {
935 head = (const struct nlattr *) nlmsg_data(nlh);
936 len = nlmsg_len(nlh);
937 switch (query->path_use) {
938 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL:
939 mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND;
940 break;
941
942 case LS_RESOLVE_PATH_USE_ALL:
943 case LS_RESOLVE_PATH_USE_GMP:
944 default:
945 mask = IB_PATH_PRIMARY | IB_PATH_GMP |
946 IB_PATH_BIDIRECTIONAL;
947 break;
948 }
949 nla_for_each_attr(curr, head, len, rem) {
950 if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
951 rec = nla_data(curr);
952 /*
953 * Get the first one. In the future, we may
954 * need to get up to 6 pathrecords.
955 */
956 if ((rec->flags & mask) == mask) {
957 mad = query->mad_buf->mad;
958 mad->mad_hdr.method |=
959 IB_MGMT_METHOD_RESP;
960 memcpy(mad->data, rec->path_rec,
961 sizeof(rec->path_rec));
962 status = 0;
963 break;
964 }
965 }
966 }
967 query->callback(query, status, mad);
968 }
969
970 mad_send_wc.send_buf = query->mad_buf;
971 mad_send_wc.status = IB_WC_SUCCESS;
972 send_handler(query->mad_buf->mad_agent, &mad_send_wc);
973 }
974
975 static void ib_nl_request_timeout(struct work_struct *work)
976 {
977 unsigned long flags;
978 struct ib_sa_query *query;
979 unsigned long delay;
980 struct ib_mad_send_wc mad_send_wc;
981 int ret;
982
983 spin_lock_irqsave(&ib_nl_request_lock, flags);
984 while (!list_empty(&ib_nl_request_list)) {
985 query = list_entry(ib_nl_request_list.next,
986 struct ib_sa_query, list);
987
988 if (time_after(query->timeout, jiffies)) {
989 delay = query->timeout - jiffies;
990 if ((long)delay <= 0)
991 delay = 1;
992 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
993 break;
994 }
995
996 list_del(&query->list);
997 ib_sa_disable_local_svc(query);
998 /* Hold the lock to protect against query cancellation */
999 if (ib_sa_query_cancelled(query))
1000 ret = -1;
1001 else
1002 ret = ib_post_send_mad(query->mad_buf, NULL);
1003 if (ret) {
1004 mad_send_wc.send_buf = query->mad_buf;
1005 mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
1006 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1007 send_handler(query->port->agent, &mad_send_wc);
1008 spin_lock_irqsave(&ib_nl_request_lock, flags);
1009 }
1010 }
1011 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1012 }
1013
1014 int ib_nl_handle_set_timeout(struct sk_buff *skb,
1015 struct nlmsghdr *nlh,
1016 struct netlink_ext_ack *extack)
1017 {
1018 int timeout, delta, abs_delta;
1019 const struct nlattr *attr;
1020 unsigned long flags;
1021 struct ib_sa_query *query;
1022 long delay = 0;
1023 struct nlattr *tb[LS_NLA_TYPE_MAX];
1024 int ret;
1025
1026 if (!(nlh->nlmsg_flags & NLM_F_REQUEST) ||
1027 !(NETLINK_CB(skb).sk))
1028 return -EPERM;
1029
1030 ret = nla_parse_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1031 nlmsg_len(nlh), ib_nl_policy, NULL);
1032 attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT];
1033 if (ret || !attr)
1034 goto settimeout_out;
1035
1036 timeout = *(int *) nla_data(attr);
1037 if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN)
1038 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN;
1039 if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX)
1040 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX;
1041
1042 delta = timeout - sa_local_svc_timeout_ms;
1043 if (delta < 0)
1044 abs_delta = -delta;
1045 else
1046 abs_delta = delta;
1047
1048 if (delta != 0) {
1049 spin_lock_irqsave(&ib_nl_request_lock, flags);
1050 sa_local_svc_timeout_ms = timeout;
1051 list_for_each_entry(query, &ib_nl_request_list, list) {
1052 if (delta < 0 && abs_delta > query->timeout)
1053 query->timeout = 0;
1054 else
1055 query->timeout += delta;
1056
1057 /* Get the new delay from the first entry */
1058 if (!delay) {
1059 delay = query->timeout - jiffies;
1060 if (delay <= 0)
1061 delay = 1;
1062 }
1063 }
1064 if (delay)
1065 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work,
1066 (unsigned long)delay);
1067 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1068 }
1069
1070 settimeout_out:
1071 return 0;
1072 }
1073
1074 static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh)
1075 {
1076 struct nlattr *tb[LS_NLA_TYPE_MAX];
1077 int ret;
1078
1079 if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR)
1080 return 0;
1081
1082 ret = nla_parse_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1083 nlmsg_len(nlh), ib_nl_policy, NULL);
1084 if (ret)
1085 return 0;
1086
1087 return 1;
1088 }
1089
1090 int ib_nl_handle_resolve_resp(struct sk_buff *skb,
1091 struct nlmsghdr *nlh,
1092 struct netlink_ext_ack *extack)
1093 {
1094 unsigned long flags;
1095 struct ib_sa_query *query;
1096 struct ib_mad_send_buf *send_buf;
1097 struct ib_mad_send_wc mad_send_wc;
1098 int found = 0;
1099 int ret;
1100
1101 if ((nlh->nlmsg_flags & NLM_F_REQUEST) ||
1102 !(NETLINK_CB(skb).sk))
1103 return -EPERM;
1104
1105 spin_lock_irqsave(&ib_nl_request_lock, flags);
1106 list_for_each_entry(query, &ib_nl_request_list, list) {
1107 /*
1108 * If the query is cancelled, let the timeout routine
1109 * take care of it.
1110 */
1111 if (nlh->nlmsg_seq == query->seq) {
1112 found = !ib_sa_query_cancelled(query);
1113 if (found)
1114 list_del(&query->list);
1115 break;
1116 }
1117 }
1118
1119 if (!found) {
1120 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1121 goto resp_out;
1122 }
1123
1124 send_buf = query->mad_buf;
1125
1126 if (!ib_nl_is_good_resolve_resp(nlh)) {
1127 /* if the result is a failure, send out the packet via IB */
1128 ib_sa_disable_local_svc(query);
1129 ret = ib_post_send_mad(query->mad_buf, NULL);
1130 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1131 if (ret) {
1132 mad_send_wc.send_buf = send_buf;
1133 mad_send_wc.status = IB_WC_GENERAL_ERR;
1134 send_handler(query->port->agent, &mad_send_wc);
1135 }
1136 } else {
1137 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1138 ib_nl_process_good_resolve_rsp(query, nlh);
1139 }
1140
1141 resp_out:
1142 return 0;
1143 }
1144
1145 static void free_sm_ah(struct kref *kref)
1146 {
1147 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
1148
1149 rdma_destroy_ah(sm_ah->ah, 0);
1150 kfree(sm_ah);
1151 }
1152
1153 void ib_sa_register_client(struct ib_sa_client *client)
1154 {
1155 atomic_set(&client->users, 1);
1156 init_completion(&client->comp);
1157 }
1158 EXPORT_SYMBOL(ib_sa_register_client);
1159
1160 void ib_sa_unregister_client(struct ib_sa_client *client)
1161 {
1162 ib_sa_client_put(client);
1163 wait_for_completion(&client->comp);
1164 }
1165 EXPORT_SYMBOL(ib_sa_unregister_client);
1166
1167 /**
1168 * ib_sa_cancel_query - try to cancel an SA query
1169 * @id:ID of query to cancel
1170 * @query:query pointer to cancel
1171 *
1172 * Try to cancel an SA query. If the id and query don't match up or
1173 * the query has already completed, nothing is done. Otherwise the
1174 * query is canceled and will complete with a status of -EINTR.
1175 */
1176 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
1177 {
1178 unsigned long flags;
1179 struct ib_mad_agent *agent;
1180 struct ib_mad_send_buf *mad_buf;
1181
1182 xa_lock_irqsave(&queries, flags);
1183 if (xa_load(&queries, id) != query) {
1184 xa_unlock_irqrestore(&queries, flags);
1185 return;
1186 }
1187 agent = query->port->agent;
1188 mad_buf = query->mad_buf;
1189 xa_unlock_irqrestore(&queries, flags);
1190
1191 /*
1192 * If the query is still on the netlink request list, schedule
1193 * it to be cancelled by the timeout routine. Otherwise, it has been
1194 * sent to the MAD layer and has to be cancelled from there.
1195 */
1196 if (!ib_nl_cancel_request(query))
1197 ib_cancel_mad(agent, mad_buf);
1198 }
1199 EXPORT_SYMBOL(ib_sa_cancel_query);
1200
1201 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
1202 {
1203 struct ib_sa_device *sa_dev;
1204 struct ib_sa_port *port;
1205 unsigned long flags;
1206 u8 src_path_mask;
1207
1208 sa_dev = ib_get_client_data(device, &sa_client);
1209 if (!sa_dev)
1210 return 0x7f;
1211
1212 port = &sa_dev->port[port_num - sa_dev->start_port];
1213 spin_lock_irqsave(&port->ah_lock, flags);
1214 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
1215 spin_unlock_irqrestore(&port->ah_lock, flags);
1216
1217 return src_path_mask;
1218 }
1219
1220 static int init_ah_attr_grh_fields(struct ib_device *device, u8 port_num,
1221 struct sa_path_rec *rec,
1222 struct rdma_ah_attr *ah_attr,
1223 const struct ib_gid_attr *gid_attr)
1224 {
1225 enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec);
1226
1227 if (!gid_attr) {
1228 gid_attr = rdma_find_gid_by_port(device, &rec->sgid, type,
1229 port_num, NULL);
1230 if (IS_ERR(gid_attr))
1231 return PTR_ERR(gid_attr);
1232 } else
1233 rdma_hold_gid_attr(gid_attr);
1234
1235 rdma_move_grh_sgid_attr(ah_attr, &rec->dgid,
1236 be32_to_cpu(rec->flow_label),
1237 rec->hop_limit, rec->traffic_class,
1238 gid_attr);
1239 return 0;
1240 }
1241
1242 /**
1243 * ib_init_ah_attr_from_path - Initialize address handle attributes based on
1244 * an SA path record.
1245 * @device: Device associated ah attributes initialization.
1246 * @port_num: Port on the specified device.
1247 * @rec: path record entry to use for ah attributes initialization.
1248 * @ah_attr: address handle attributes to initialization from path record.
1249 * @gid_attr: SGID attribute to consider during initialization.
1250 *
1251 * When ib_init_ah_attr_from_path() returns success,
1252 * (a) for IB link layer it optionally contains a reference to SGID attribute
1253 * when GRH is present for IB link layer.
1254 * (b) for RoCE link layer it contains a reference to SGID attribute.
1255 * User must invoke rdma_destroy_ah_attr() to release reference to SGID
1256 * attributes which are initialized using ib_init_ah_attr_from_path().
1257 */
1258 int ib_init_ah_attr_from_path(struct ib_device *device, u8 port_num,
1259 struct sa_path_rec *rec,
1260 struct rdma_ah_attr *ah_attr,
1261 const struct ib_gid_attr *gid_attr)
1262 {
1263 int ret = 0;
1264
1265 memset(ah_attr, 0, sizeof(*ah_attr));
1266 ah_attr->type = rdma_ah_find_type(device, port_num);
1267 rdma_ah_set_sl(ah_attr, rec->sl);
1268 rdma_ah_set_port_num(ah_attr, port_num);
1269 rdma_ah_set_static_rate(ah_attr, rec->rate);
1270
1271 if (sa_path_is_roce(rec)) {
1272 ret = roce_resolve_route_from_path(rec, gid_attr);
1273 if (ret)
1274 return ret;
1275
1276 memcpy(ah_attr->roce.dmac, sa_path_get_dmac(rec), ETH_ALEN);
1277 } else {
1278 rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec)));
1279 if (sa_path_is_opa(rec) &&
1280 rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE))
1281 rdma_ah_set_make_grd(ah_attr, true);
1282
1283 rdma_ah_set_path_bits(ah_attr,
1284 be32_to_cpu(sa_path_get_slid(rec)) &
1285 get_src_path_mask(device, port_num));
1286 }
1287
1288 if (rec->hop_limit > 0 || sa_path_is_roce(rec))
1289 ret = init_ah_attr_grh_fields(device, port_num,
1290 rec, ah_attr, gid_attr);
1291 return ret;
1292 }
1293 EXPORT_SYMBOL(ib_init_ah_attr_from_path);
1294
1295 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1296 {
1297 struct rdma_ah_attr ah_attr;
1298 unsigned long flags;
1299
1300 spin_lock_irqsave(&query->port->ah_lock, flags);
1301 if (!query->port->sm_ah) {
1302 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1303 return -EAGAIN;
1304 }
1305 kref_get(&query->port->sm_ah->ref);
1306 query->sm_ah = query->port->sm_ah;
1307 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1308
1309 /*
1310 * Always check if sm_ah has valid dlid assigned,
1311 * before querying for class port info
1312 */
1313 if ((rdma_query_ah(query->sm_ah->ah, &ah_attr) < 0) ||
1314 !rdma_is_valid_unicast_lid(&ah_attr)) {
1315 kref_put(&query->sm_ah->ref, free_sm_ah);
1316 return -EAGAIN;
1317 }
1318 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1319 query->sm_ah->pkey_index,
1320 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
1321 gfp_mask,
1322 ((query->flags & IB_SA_QUERY_OPA) ?
1323 OPA_MGMT_BASE_VERSION :
1324 IB_MGMT_BASE_VERSION));
1325 if (IS_ERR(query->mad_buf)) {
1326 kref_put(&query->sm_ah->ref, free_sm_ah);
1327 return -ENOMEM;
1328 }
1329
1330 query->mad_buf->ah = query->sm_ah->ah;
1331
1332 return 0;
1333 }
1334
1335 static void free_mad(struct ib_sa_query *query)
1336 {
1337 ib_free_send_mad(query->mad_buf);
1338 kref_put(&query->sm_ah->ref, free_sm_ah);
1339 }
1340
1341 static void init_mad(struct ib_sa_query *query, struct ib_mad_agent *agent)
1342 {
1343 struct ib_sa_mad *mad = query->mad_buf->mad;
1344 unsigned long flags;
1345
1346 memset(mad, 0, sizeof *mad);
1347
1348 if (query->flags & IB_SA_QUERY_OPA) {
1349 mad->mad_hdr.base_version = OPA_MGMT_BASE_VERSION;
1350 mad->mad_hdr.class_version = OPA_SA_CLASS_VERSION;
1351 } else {
1352 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
1353 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1354 }
1355 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
1356 spin_lock_irqsave(&tid_lock, flags);
1357 mad->mad_hdr.tid =
1358 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1359 spin_unlock_irqrestore(&tid_lock, flags);
1360 }
1361
1362 static int send_mad(struct ib_sa_query *query, unsigned long timeout_ms,
1363 gfp_t gfp_mask)
1364 {
1365 unsigned long flags;
1366 int ret, id;
1367
1368 xa_lock_irqsave(&queries, flags);
1369 ret = __xa_alloc(&queries, &id, query, xa_limit_32b, gfp_mask);
1370 xa_unlock_irqrestore(&queries, flags);
1371 if (ret < 0)
1372 return ret;
1373
1374 query->mad_buf->timeout_ms = timeout_ms;
1375 query->mad_buf->context[0] = query;
1376 query->id = id;
1377
1378 if ((query->flags & IB_SA_ENABLE_LOCAL_SERVICE) &&
1379 (!(query->flags & IB_SA_QUERY_OPA))) {
1380 if (rdma_nl_chk_listeners(RDMA_NL_GROUP_LS)) {
1381 if (!ib_nl_make_request(query, gfp_mask))
1382 return id;
1383 }
1384 ib_sa_disable_local_svc(query);
1385 }
1386
1387 ret = ib_post_send_mad(query->mad_buf, NULL);
1388 if (ret) {
1389 xa_lock_irqsave(&queries, flags);
1390 __xa_erase(&queries, id);
1391 xa_unlock_irqrestore(&queries, flags);
1392 }
1393
1394 /*
1395 * It's not safe to dereference query any more, because the
1396 * send may already have completed and freed the query in
1397 * another context.
1398 */
1399 return ret ? ret : id;
1400 }
1401
1402 void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec)
1403 {
1404 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1405 }
1406 EXPORT_SYMBOL(ib_sa_unpack_path);
1407
1408 void ib_sa_pack_path(struct sa_path_rec *rec, void *attribute)
1409 {
1410 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1411 }
1412 EXPORT_SYMBOL(ib_sa_pack_path);
1413
1414 static bool ib_sa_opa_pathrecord_support(struct ib_sa_client *client,
1415 struct ib_device *device,
1416 u8 port_num)
1417 {
1418 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1419 struct ib_sa_port *port;
1420 unsigned long flags;
1421 bool ret = false;
1422
1423 if (!sa_dev)
1424 return ret;
1425
1426 port = &sa_dev->port[port_num - sa_dev->start_port];
1427 spin_lock_irqsave(&port->classport_lock, flags);
1428 if (!port->classport_info.valid)
1429 goto ret;
1430
1431 if (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_OPA)
1432 ret = opa_get_cpi_capmask2(&port->classport_info.data.opa) &
1433 OPA_CLASS_PORT_INFO_PR_SUPPORT;
1434 ret:
1435 spin_unlock_irqrestore(&port->classport_lock, flags);
1436 return ret;
1437 }
1438
1439 enum opa_pr_supported {
1440 PR_NOT_SUPPORTED,
1441 PR_OPA_SUPPORTED,
1442 PR_IB_SUPPORTED
1443 };
1444
1445 /**
1446 * Check if current PR query can be an OPA query.
1447 * Retuns PR_NOT_SUPPORTED if a path record query is not
1448 * possible, PR_OPA_SUPPORTED if an OPA path record query
1449 * is possible and PR_IB_SUPPORTED if an IB path record
1450 * query is possible.
1451 */
1452 static int opa_pr_query_possible(struct ib_sa_client *client,
1453 struct ib_device *device,
1454 u8 port_num,
1455 struct sa_path_rec *rec)
1456 {
1457 struct ib_port_attr port_attr;
1458
1459 if (ib_query_port(device, port_num, &port_attr))
1460 return PR_NOT_SUPPORTED;
1461
1462 if (ib_sa_opa_pathrecord_support(client, device, port_num))
1463 return PR_OPA_SUPPORTED;
1464
1465 if (port_attr.lid >= be16_to_cpu(IB_MULTICAST_LID_BASE))
1466 return PR_NOT_SUPPORTED;
1467 else
1468 return PR_IB_SUPPORTED;
1469 }
1470
1471 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1472 int status,
1473 struct ib_sa_mad *mad)
1474 {
1475 struct ib_sa_path_query *query =
1476 container_of(sa_query, struct ib_sa_path_query, sa_query);
1477
1478 if (mad) {
1479 struct sa_path_rec rec;
1480
1481 if (sa_query->flags & IB_SA_QUERY_OPA) {
1482 ib_unpack(opa_path_rec_table,
1483 ARRAY_SIZE(opa_path_rec_table),
1484 mad->data, &rec);
1485 rec.rec_type = SA_PATH_REC_TYPE_OPA;
1486 query->callback(status, &rec, query->context);
1487 } else {
1488 ib_unpack(path_rec_table,
1489 ARRAY_SIZE(path_rec_table),
1490 mad->data, &rec);
1491 rec.rec_type = SA_PATH_REC_TYPE_IB;
1492 sa_path_set_dmac_zero(&rec);
1493
1494 if (query->conv_pr) {
1495 struct sa_path_rec opa;
1496
1497 memset(&opa, 0, sizeof(struct sa_path_rec));
1498 sa_convert_path_ib_to_opa(&opa, &rec);
1499 query->callback(status, &opa, query->context);
1500 } else {
1501 query->callback(status, &rec, query->context);
1502 }
1503 }
1504 } else
1505 query->callback(status, NULL, query->context);
1506 }
1507
1508 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1509 {
1510 struct ib_sa_path_query *query =
1511 container_of(sa_query, struct ib_sa_path_query, sa_query);
1512
1513 kfree(query->conv_pr);
1514 kfree(query);
1515 }
1516
1517 /**
1518 * ib_sa_path_rec_get - Start a Path get query
1519 * @client:SA client
1520 * @device:device to send query on
1521 * @port_num: port number to send query on
1522 * @rec:Path Record to send in query
1523 * @comp_mask:component mask to send in query
1524 * @timeout_ms:time to wait for response
1525 * @gfp_mask:GFP mask to use for internal allocations
1526 * @callback:function called when query completes, times out or is
1527 * canceled
1528 * @context:opaque user context passed to callback
1529 * @sa_query:query context, used to cancel query
1530 *
1531 * Send a Path Record Get query to the SA to look up a path. The
1532 * callback function will be called when the query completes (or
1533 * fails); status is 0 for a successful response, -EINTR if the query
1534 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1535 * occurred sending the query. The resp parameter of the callback is
1536 * only valid if status is 0.
1537 *
1538 * If the return value of ib_sa_path_rec_get() is negative, it is an
1539 * error code. Otherwise it is a query ID that can be used to cancel
1540 * the query.
1541 */
1542 int ib_sa_path_rec_get(struct ib_sa_client *client,
1543 struct ib_device *device, u8 port_num,
1544 struct sa_path_rec *rec,
1545 ib_sa_comp_mask comp_mask,
1546 unsigned long timeout_ms, gfp_t gfp_mask,
1547 void (*callback)(int status,
1548 struct sa_path_rec *resp,
1549 void *context),
1550 void *context,
1551 struct ib_sa_query **sa_query)
1552 {
1553 struct ib_sa_path_query *query;
1554 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1555 struct ib_sa_port *port;
1556 struct ib_mad_agent *agent;
1557 struct ib_sa_mad *mad;
1558 enum opa_pr_supported status;
1559 int ret;
1560
1561 if (!sa_dev)
1562 return -ENODEV;
1563
1564 if ((rec->rec_type != SA_PATH_REC_TYPE_IB) &&
1565 (rec->rec_type != SA_PATH_REC_TYPE_OPA))
1566 return -EINVAL;
1567
1568 port = &sa_dev->port[port_num - sa_dev->start_port];
1569 agent = port->agent;
1570
1571 query = kzalloc(sizeof(*query), gfp_mask);
1572 if (!query)
1573 return -ENOMEM;
1574
1575 query->sa_query.port = port;
1576 if (rec->rec_type == SA_PATH_REC_TYPE_OPA) {
1577 status = opa_pr_query_possible(client, device, port_num, rec);
1578 if (status == PR_NOT_SUPPORTED) {
1579 ret = -EINVAL;
1580 goto err1;
1581 } else if (status == PR_OPA_SUPPORTED) {
1582 query->sa_query.flags |= IB_SA_QUERY_OPA;
1583 } else {
1584 query->conv_pr =
1585 kmalloc(sizeof(*query->conv_pr), gfp_mask);
1586 if (!query->conv_pr) {
1587 ret = -ENOMEM;
1588 goto err1;
1589 }
1590 }
1591 }
1592
1593 ret = alloc_mad(&query->sa_query, gfp_mask);
1594 if (ret)
1595 goto err2;
1596
1597 ib_sa_client_get(client);
1598 query->sa_query.client = client;
1599 query->callback = callback;
1600 query->context = context;
1601
1602 mad = query->sa_query.mad_buf->mad;
1603 init_mad(&query->sa_query, agent);
1604
1605 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1606 query->sa_query.release = ib_sa_path_rec_release;
1607 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1608 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1609 mad->sa_hdr.comp_mask = comp_mask;
1610
1611 if (query->sa_query.flags & IB_SA_QUERY_OPA) {
1612 ib_pack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table),
1613 rec, mad->data);
1614 } else if (query->conv_pr) {
1615 sa_convert_path_opa_to_ib(query->conv_pr, rec);
1616 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1617 query->conv_pr, mad->data);
1618 } else {
1619 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1620 rec, mad->data);
1621 }
1622
1623 *sa_query = &query->sa_query;
1624
1625 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1626 query->sa_query.mad_buf->context[1] = (query->conv_pr) ?
1627 query->conv_pr : rec;
1628
1629 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1630 if (ret < 0)
1631 goto err3;
1632
1633 return ret;
1634
1635 err3:
1636 *sa_query = NULL;
1637 ib_sa_client_put(query->sa_query.client);
1638 free_mad(&query->sa_query);
1639 err2:
1640 kfree(query->conv_pr);
1641 err1:
1642 kfree(query);
1643 return ret;
1644 }
1645 EXPORT_SYMBOL(ib_sa_path_rec_get);
1646
1647 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1648 int status,
1649 struct ib_sa_mad *mad)
1650 {
1651 struct ib_sa_service_query *query =
1652 container_of(sa_query, struct ib_sa_service_query, sa_query);
1653
1654 if (mad) {
1655 struct ib_sa_service_rec rec;
1656
1657 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1658 mad->data, &rec);
1659 query->callback(status, &rec, query->context);
1660 } else
1661 query->callback(status, NULL, query->context);
1662 }
1663
1664 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1665 {
1666 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1667 }
1668
1669 /**
1670 * ib_sa_service_rec_query - Start Service Record operation
1671 * @client:SA client
1672 * @device:device to send request on
1673 * @port_num: port number to send request on
1674 * @method:SA method - should be get, set, or delete
1675 * @rec:Service Record to send in request
1676 * @comp_mask:component mask to send in request
1677 * @timeout_ms:time to wait for response
1678 * @gfp_mask:GFP mask to use for internal allocations
1679 * @callback:function called when request completes, times out or is
1680 * canceled
1681 * @context:opaque user context passed to callback
1682 * @sa_query:request context, used to cancel request
1683 *
1684 * Send a Service Record set/get/delete to the SA to register,
1685 * unregister or query a service record.
1686 * The callback function will be called when the request completes (or
1687 * fails); status is 0 for a successful response, -EINTR if the query
1688 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1689 * occurred sending the query. The resp parameter of the callback is
1690 * only valid if status is 0.
1691 *
1692 * If the return value of ib_sa_service_rec_query() is negative, it is an
1693 * error code. Otherwise it is a request ID that can be used to cancel
1694 * the query.
1695 */
1696 int ib_sa_service_rec_query(struct ib_sa_client *client,
1697 struct ib_device *device, u8 port_num, u8 method,
1698 struct ib_sa_service_rec *rec,
1699 ib_sa_comp_mask comp_mask,
1700 unsigned long timeout_ms, gfp_t gfp_mask,
1701 void (*callback)(int status,
1702 struct ib_sa_service_rec *resp,
1703 void *context),
1704 void *context,
1705 struct ib_sa_query **sa_query)
1706 {
1707 struct ib_sa_service_query *query;
1708 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1709 struct ib_sa_port *port;
1710 struct ib_mad_agent *agent;
1711 struct ib_sa_mad *mad;
1712 int ret;
1713
1714 if (!sa_dev)
1715 return -ENODEV;
1716
1717 port = &sa_dev->port[port_num - sa_dev->start_port];
1718 agent = port->agent;
1719
1720 if (method != IB_MGMT_METHOD_GET &&
1721 method != IB_MGMT_METHOD_SET &&
1722 method != IB_SA_METHOD_DELETE)
1723 return -EINVAL;
1724
1725 query = kzalloc(sizeof(*query), gfp_mask);
1726 if (!query)
1727 return -ENOMEM;
1728
1729 query->sa_query.port = port;
1730 ret = alloc_mad(&query->sa_query, gfp_mask);
1731 if (ret)
1732 goto err1;
1733
1734 ib_sa_client_get(client);
1735 query->sa_query.client = client;
1736 query->callback = callback;
1737 query->context = context;
1738
1739 mad = query->sa_query.mad_buf->mad;
1740 init_mad(&query->sa_query, agent);
1741
1742 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1743 query->sa_query.release = ib_sa_service_rec_release;
1744 mad->mad_hdr.method = method;
1745 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1746 mad->sa_hdr.comp_mask = comp_mask;
1747
1748 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
1749 rec, mad->data);
1750
1751 *sa_query = &query->sa_query;
1752
1753 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1754 if (ret < 0)
1755 goto err2;
1756
1757 return ret;
1758
1759 err2:
1760 *sa_query = NULL;
1761 ib_sa_client_put(query->sa_query.client);
1762 free_mad(&query->sa_query);
1763
1764 err1:
1765 kfree(query);
1766 return ret;
1767 }
1768 EXPORT_SYMBOL(ib_sa_service_rec_query);
1769
1770 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1771 int status,
1772 struct ib_sa_mad *mad)
1773 {
1774 struct ib_sa_mcmember_query *query =
1775 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1776
1777 if (mad) {
1778 struct ib_sa_mcmember_rec rec;
1779
1780 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1781 mad->data, &rec);
1782 query->callback(status, &rec, query->context);
1783 } else
1784 query->callback(status, NULL, query->context);
1785 }
1786
1787 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1788 {
1789 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1790 }
1791
1792 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1793 struct ib_device *device, u8 port_num,
1794 u8 method,
1795 struct ib_sa_mcmember_rec *rec,
1796 ib_sa_comp_mask comp_mask,
1797 unsigned long timeout_ms, gfp_t gfp_mask,
1798 void (*callback)(int status,
1799 struct ib_sa_mcmember_rec *resp,
1800 void *context),
1801 void *context,
1802 struct ib_sa_query **sa_query)
1803 {
1804 struct ib_sa_mcmember_query *query;
1805 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1806 struct ib_sa_port *port;
1807 struct ib_mad_agent *agent;
1808 struct ib_sa_mad *mad;
1809 int ret;
1810
1811 if (!sa_dev)
1812 return -ENODEV;
1813
1814 port = &sa_dev->port[port_num - sa_dev->start_port];
1815 agent = port->agent;
1816
1817 query = kzalloc(sizeof(*query), gfp_mask);
1818 if (!query)
1819 return -ENOMEM;
1820
1821 query->sa_query.port = port;
1822 ret = alloc_mad(&query->sa_query, gfp_mask);
1823 if (ret)
1824 goto err1;
1825
1826 ib_sa_client_get(client);
1827 query->sa_query.client = client;
1828 query->callback = callback;
1829 query->context = context;
1830
1831 mad = query->sa_query.mad_buf->mad;
1832 init_mad(&query->sa_query, agent);
1833
1834 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1835 query->sa_query.release = ib_sa_mcmember_rec_release;
1836 mad->mad_hdr.method = method;
1837 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1838 mad->sa_hdr.comp_mask = comp_mask;
1839
1840 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1841 rec, mad->data);
1842
1843 *sa_query = &query->sa_query;
1844
1845 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1846 if (ret < 0)
1847 goto err2;
1848
1849 return ret;
1850
1851 err2:
1852 *sa_query = NULL;
1853 ib_sa_client_put(query->sa_query.client);
1854 free_mad(&query->sa_query);
1855
1856 err1:
1857 kfree(query);
1858 return ret;
1859 }
1860
1861 /* Support GuidInfoRecord */
1862 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1863 int status,
1864 struct ib_sa_mad *mad)
1865 {
1866 struct ib_sa_guidinfo_query *query =
1867 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1868
1869 if (mad) {
1870 struct ib_sa_guidinfo_rec rec;
1871
1872 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1873 mad->data, &rec);
1874 query->callback(status, &rec, query->context);
1875 } else
1876 query->callback(status, NULL, query->context);
1877 }
1878
1879 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1880 {
1881 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1882 }
1883
1884 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1885 struct ib_device *device, u8 port_num,
1886 struct ib_sa_guidinfo_rec *rec,
1887 ib_sa_comp_mask comp_mask, u8 method,
1888 unsigned long timeout_ms, gfp_t gfp_mask,
1889 void (*callback)(int status,
1890 struct ib_sa_guidinfo_rec *resp,
1891 void *context),
1892 void *context,
1893 struct ib_sa_query **sa_query)
1894 {
1895 struct ib_sa_guidinfo_query *query;
1896 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1897 struct ib_sa_port *port;
1898 struct ib_mad_agent *agent;
1899 struct ib_sa_mad *mad;
1900 int ret;
1901
1902 if (!sa_dev)
1903 return -ENODEV;
1904
1905 if (method != IB_MGMT_METHOD_GET &&
1906 method != IB_MGMT_METHOD_SET &&
1907 method != IB_SA_METHOD_DELETE) {
1908 return -EINVAL;
1909 }
1910
1911 port = &sa_dev->port[port_num - sa_dev->start_port];
1912 agent = port->agent;
1913
1914 query = kzalloc(sizeof(*query), gfp_mask);
1915 if (!query)
1916 return -ENOMEM;
1917
1918 query->sa_query.port = port;
1919 ret = alloc_mad(&query->sa_query, gfp_mask);
1920 if (ret)
1921 goto err1;
1922
1923 ib_sa_client_get(client);
1924 query->sa_query.client = client;
1925 query->callback = callback;
1926 query->context = context;
1927
1928 mad = query->sa_query.mad_buf->mad;
1929 init_mad(&query->sa_query, agent);
1930
1931 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1932 query->sa_query.release = ib_sa_guidinfo_rec_release;
1933
1934 mad->mad_hdr.method = method;
1935 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1936 mad->sa_hdr.comp_mask = comp_mask;
1937
1938 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1939 mad->data);
1940
1941 *sa_query = &query->sa_query;
1942
1943 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1944 if (ret < 0)
1945 goto err2;
1946
1947 return ret;
1948
1949 err2:
1950 *sa_query = NULL;
1951 ib_sa_client_put(query->sa_query.client);
1952 free_mad(&query->sa_query);
1953
1954 err1:
1955 kfree(query);
1956 return ret;
1957 }
1958 EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
1959
1960 bool ib_sa_sendonly_fullmem_support(struct ib_sa_client *client,
1961 struct ib_device *device,
1962 u8 port_num)
1963 {
1964 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1965 struct ib_sa_port *port;
1966 bool ret = false;
1967 unsigned long flags;
1968
1969 if (!sa_dev)
1970 return ret;
1971
1972 port = &sa_dev->port[port_num - sa_dev->start_port];
1973
1974 spin_lock_irqsave(&port->classport_lock, flags);
1975 if ((port->classport_info.valid) &&
1976 (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_IB))
1977 ret = ib_get_cpi_capmask2(&port->classport_info.data.ib)
1978 & IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT;
1979 spin_unlock_irqrestore(&port->classport_lock, flags);
1980 return ret;
1981 }
1982 EXPORT_SYMBOL(ib_sa_sendonly_fullmem_support);
1983
1984 struct ib_classport_info_context {
1985 struct completion done;
1986 struct ib_sa_query *sa_query;
1987 };
1988
1989 static void ib_classportinfo_cb(void *context)
1990 {
1991 struct ib_classport_info_context *cb_ctx = context;
1992
1993 complete(&cb_ctx->done);
1994 }
1995
1996 static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
1997 int status,
1998 struct ib_sa_mad *mad)
1999 {
2000 unsigned long flags;
2001 struct ib_sa_classport_info_query *query =
2002 container_of(sa_query, struct ib_sa_classport_info_query, sa_query);
2003 struct ib_sa_classport_cache *info = &sa_query->port->classport_info;
2004
2005 if (mad) {
2006 if (sa_query->flags & IB_SA_QUERY_OPA) {
2007 struct opa_class_port_info rec;
2008
2009 ib_unpack(opa_classport_info_rec_table,
2010 ARRAY_SIZE(opa_classport_info_rec_table),
2011 mad->data, &rec);
2012
2013 spin_lock_irqsave(&sa_query->port->classport_lock,
2014 flags);
2015 if (!status && !info->valid) {
2016 memcpy(&info->data.opa, &rec,
2017 sizeof(info->data.opa));
2018
2019 info->valid = true;
2020 info->data.type = RDMA_CLASS_PORT_INFO_OPA;
2021 }
2022 spin_unlock_irqrestore(&sa_query->port->classport_lock,
2023 flags);
2024
2025 } else {
2026 struct ib_class_port_info rec;
2027
2028 ib_unpack(ib_classport_info_rec_table,
2029 ARRAY_SIZE(ib_classport_info_rec_table),
2030 mad->data, &rec);
2031
2032 spin_lock_irqsave(&sa_query->port->classport_lock,
2033 flags);
2034 if (!status && !info->valid) {
2035 memcpy(&info->data.ib, &rec,
2036 sizeof(info->data.ib));
2037
2038 info->valid = true;
2039 info->data.type = RDMA_CLASS_PORT_INFO_IB;
2040 }
2041 spin_unlock_irqrestore(&sa_query->port->classport_lock,
2042 flags);
2043 }
2044 }
2045 query->callback(query->context);
2046 }
2047
2048 static void ib_sa_classport_info_rec_release(struct ib_sa_query *sa_query)
2049 {
2050 kfree(container_of(sa_query, struct ib_sa_classport_info_query,
2051 sa_query));
2052 }
2053
2054 static int ib_sa_classport_info_rec_query(struct ib_sa_port *port,
2055 unsigned long timeout_ms,
2056 void (*callback)(void *context),
2057 void *context,
2058 struct ib_sa_query **sa_query)
2059 {
2060 struct ib_mad_agent *agent;
2061 struct ib_sa_classport_info_query *query;
2062 struct ib_sa_mad *mad;
2063 gfp_t gfp_mask = GFP_KERNEL;
2064 int ret;
2065
2066 agent = port->agent;
2067
2068 query = kzalloc(sizeof(*query), gfp_mask);
2069 if (!query)
2070 return -ENOMEM;
2071
2072 query->sa_query.port = port;
2073 query->sa_query.flags |= rdma_cap_opa_ah(port->agent->device,
2074 port->port_num) ?
2075 IB_SA_QUERY_OPA : 0;
2076 ret = alloc_mad(&query->sa_query, gfp_mask);
2077 if (ret)
2078 goto err_free;
2079
2080 query->callback = callback;
2081 query->context = context;
2082
2083 mad = query->sa_query.mad_buf->mad;
2084 init_mad(&query->sa_query, agent);
2085
2086 query->sa_query.callback = ib_sa_classport_info_rec_callback;
2087 query->sa_query.release = ib_sa_classport_info_rec_release;
2088 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
2089 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO);
2090 mad->sa_hdr.comp_mask = 0;
2091 *sa_query = &query->sa_query;
2092
2093 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
2094 if (ret < 0)
2095 goto err_free_mad;
2096
2097 return ret;
2098
2099 err_free_mad:
2100 *sa_query = NULL;
2101 free_mad(&query->sa_query);
2102
2103 err_free:
2104 kfree(query);
2105 return ret;
2106 }
2107
2108 static void update_ib_cpi(struct work_struct *work)
2109 {
2110 struct ib_sa_port *port =
2111 container_of(work, struct ib_sa_port, ib_cpi_work.work);
2112 struct ib_classport_info_context *cb_context;
2113 unsigned long flags;
2114 int ret;
2115
2116 /* If the classport info is valid, nothing
2117 * to do here.
2118 */
2119 spin_lock_irqsave(&port->classport_lock, flags);
2120 if (port->classport_info.valid) {
2121 spin_unlock_irqrestore(&port->classport_lock, flags);
2122 return;
2123 }
2124 spin_unlock_irqrestore(&port->classport_lock, flags);
2125
2126 cb_context = kmalloc(sizeof(*cb_context), GFP_KERNEL);
2127 if (!cb_context)
2128 goto err_nomem;
2129
2130 init_completion(&cb_context->done);
2131
2132 ret = ib_sa_classport_info_rec_query(port, 3000,
2133 ib_classportinfo_cb, cb_context,
2134 &cb_context->sa_query);
2135 if (ret < 0)
2136 goto free_cb_err;
2137 wait_for_completion(&cb_context->done);
2138 free_cb_err:
2139 kfree(cb_context);
2140 spin_lock_irqsave(&port->classport_lock, flags);
2141
2142 /* If the classport info is still not valid, the query should have
2143 * failed for some reason. Retry issuing the query
2144 */
2145 if (!port->classport_info.valid) {
2146 port->classport_info.retry_cnt++;
2147 if (port->classport_info.retry_cnt <=
2148 IB_SA_CPI_MAX_RETRY_CNT) {
2149 unsigned long delay =
2150 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2151
2152 queue_delayed_work(ib_wq, &port->ib_cpi_work, delay);
2153 }
2154 }
2155 spin_unlock_irqrestore(&port->classport_lock, flags);
2156
2157 err_nomem:
2158 return;
2159 }
2160
2161 static void send_handler(struct ib_mad_agent *agent,
2162 struct ib_mad_send_wc *mad_send_wc)
2163 {
2164 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
2165 unsigned long flags;
2166
2167 if (query->callback)
2168 switch (mad_send_wc->status) {
2169 case IB_WC_SUCCESS:
2170 /* No callback -- already got recv */
2171 break;
2172 case IB_WC_RESP_TIMEOUT_ERR:
2173 query->callback(query, -ETIMEDOUT, NULL);
2174 break;
2175 case IB_WC_WR_FLUSH_ERR:
2176 query->callback(query, -EINTR, NULL);
2177 break;
2178 default:
2179 query->callback(query, -EIO, NULL);
2180 break;
2181 }
2182
2183 xa_lock_irqsave(&queries, flags);
2184 __xa_erase(&queries, query->id);
2185 xa_unlock_irqrestore(&queries, flags);
2186
2187 free_mad(query);
2188 if (query->client)
2189 ib_sa_client_put(query->client);
2190 query->release(query);
2191 }
2192
2193 static void recv_handler(struct ib_mad_agent *mad_agent,
2194 struct ib_mad_send_buf *send_buf,
2195 struct ib_mad_recv_wc *mad_recv_wc)
2196 {
2197 struct ib_sa_query *query;
2198
2199 if (!send_buf)
2200 return;
2201
2202 query = send_buf->context[0];
2203 if (query->callback) {
2204 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
2205 query->callback(query,
2206 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
2207 -EINVAL : 0,
2208 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
2209 else
2210 query->callback(query, -EIO, NULL);
2211 }
2212
2213 ib_free_recv_mad(mad_recv_wc);
2214 }
2215
2216 static void update_sm_ah(struct work_struct *work)
2217 {
2218 struct ib_sa_port *port =
2219 container_of(work, struct ib_sa_port, update_task);
2220 struct ib_sa_sm_ah *new_ah;
2221 struct ib_port_attr port_attr;
2222 struct rdma_ah_attr ah_attr;
2223 bool grh_required;
2224
2225 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
2226 pr_warn("Couldn't query port\n");
2227 return;
2228 }
2229
2230 new_ah = kmalloc(sizeof(*new_ah), GFP_KERNEL);
2231 if (!new_ah)
2232 return;
2233
2234 kref_init(&new_ah->ref);
2235 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
2236
2237 new_ah->pkey_index = 0;
2238 if (ib_find_pkey(port->agent->device, port->port_num,
2239 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
2240 pr_err("Couldn't find index for default PKey\n");
2241
2242 memset(&ah_attr, 0, sizeof(ah_attr));
2243 ah_attr.type = rdma_ah_find_type(port->agent->device,
2244 port->port_num);
2245 rdma_ah_set_dlid(&ah_attr, port_attr.sm_lid);
2246 rdma_ah_set_sl(&ah_attr, port_attr.sm_sl);
2247 rdma_ah_set_port_num(&ah_attr, port->port_num);
2248
2249 grh_required = rdma_is_grh_required(port->agent->device,
2250 port->port_num);
2251
2252 /*
2253 * The OPA sm_lid of 0xFFFF needs special handling so that it can be
2254 * differentiated from a permissive LID of 0xFFFF. We set the
2255 * grh_required flag here so the SA can program the DGID in the
2256 * address handle appropriately
2257 */
2258 if (ah_attr.type == RDMA_AH_ATTR_TYPE_OPA &&
2259 (grh_required ||
2260 port_attr.sm_lid == be16_to_cpu(IB_LID_PERMISSIVE)))
2261 rdma_ah_set_make_grd(&ah_attr, true);
2262
2263 if (ah_attr.type == RDMA_AH_ATTR_TYPE_IB && grh_required) {
2264 rdma_ah_set_ah_flags(&ah_attr, IB_AH_GRH);
2265 rdma_ah_set_subnet_prefix(&ah_attr,
2266 cpu_to_be64(port_attr.subnet_prefix));
2267 rdma_ah_set_interface_id(&ah_attr,
2268 cpu_to_be64(IB_SA_WELL_KNOWN_GUID));
2269 }
2270
2271 new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr,
2272 RDMA_CREATE_AH_SLEEPABLE);
2273 if (IS_ERR(new_ah->ah)) {
2274 pr_warn("Couldn't create new SM AH\n");
2275 kfree(new_ah);
2276 return;
2277 }
2278
2279 spin_lock_irq(&port->ah_lock);
2280 if (port->sm_ah)
2281 kref_put(&port->sm_ah->ref, free_sm_ah);
2282 port->sm_ah = new_ah;
2283 spin_unlock_irq(&port->ah_lock);
2284 }
2285
2286 static void ib_sa_event(struct ib_event_handler *handler,
2287 struct ib_event *event)
2288 {
2289 if (event->event == IB_EVENT_PORT_ERR ||
2290 event->event == IB_EVENT_PORT_ACTIVE ||
2291 event->event == IB_EVENT_LID_CHANGE ||
2292 event->event == IB_EVENT_PKEY_CHANGE ||
2293 event->event == IB_EVENT_SM_CHANGE ||
2294 event->event == IB_EVENT_CLIENT_REREGISTER) {
2295 unsigned long flags;
2296 struct ib_sa_device *sa_dev =
2297 container_of(handler, typeof(*sa_dev), event_handler);
2298 u8 port_num = event->element.port_num - sa_dev->start_port;
2299 struct ib_sa_port *port = &sa_dev->port[port_num];
2300
2301 if (!rdma_cap_ib_sa(handler->device, port->port_num))
2302 return;
2303
2304 spin_lock_irqsave(&port->ah_lock, flags);
2305 if (port->sm_ah)
2306 kref_put(&port->sm_ah->ref, free_sm_ah);
2307 port->sm_ah = NULL;
2308 spin_unlock_irqrestore(&port->ah_lock, flags);
2309
2310 if (event->event == IB_EVENT_SM_CHANGE ||
2311 event->event == IB_EVENT_CLIENT_REREGISTER ||
2312 event->event == IB_EVENT_LID_CHANGE ||
2313 event->event == IB_EVENT_PORT_ACTIVE) {
2314 unsigned long delay =
2315 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2316
2317 spin_lock_irqsave(&port->classport_lock, flags);
2318 port->classport_info.valid = false;
2319 port->classport_info.retry_cnt = 0;
2320 spin_unlock_irqrestore(&port->classport_lock, flags);
2321 queue_delayed_work(ib_wq,
2322 &port->ib_cpi_work, delay);
2323 }
2324 queue_work(ib_wq, &sa_dev->port[port_num].update_task);
2325 }
2326 }
2327
2328 static void ib_sa_add_one(struct ib_device *device)
2329 {
2330 struct ib_sa_device *sa_dev;
2331 int s, e, i;
2332 int count = 0;
2333
2334 s = rdma_start_port(device);
2335 e = rdma_end_port(device);
2336
2337 sa_dev = kzalloc(struct_size(sa_dev, port, e - s + 1), GFP_KERNEL);
2338 if (!sa_dev)
2339 return;
2340
2341 sa_dev->start_port = s;
2342 sa_dev->end_port = e;
2343
2344 for (i = 0; i <= e - s; ++i) {
2345 spin_lock_init(&sa_dev->port[i].ah_lock);
2346 if (!rdma_cap_ib_sa(device, i + 1))
2347 continue;
2348
2349 sa_dev->port[i].sm_ah = NULL;
2350 sa_dev->port[i].port_num = i + s;
2351
2352 spin_lock_init(&sa_dev->port[i].classport_lock);
2353 sa_dev->port[i].classport_info.valid = false;
2354
2355 sa_dev->port[i].agent =
2356 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
2357 NULL, 0, send_handler,
2358 recv_handler, sa_dev, 0);
2359 if (IS_ERR(sa_dev->port[i].agent))
2360 goto err;
2361
2362 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
2363 INIT_DELAYED_WORK(&sa_dev->port[i].ib_cpi_work,
2364 update_ib_cpi);
2365
2366 count++;
2367 }
2368
2369 if (!count)
2370 goto free;
2371
2372 ib_set_client_data(device, &sa_client, sa_dev);
2373
2374 /*
2375 * We register our event handler after everything is set up,
2376 * and then update our cached info after the event handler is
2377 * registered to avoid any problems if a port changes state
2378 * during our initialization.
2379 */
2380
2381 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
2382 ib_register_event_handler(&sa_dev->event_handler);
2383
2384 for (i = 0; i <= e - s; ++i) {
2385 if (rdma_cap_ib_sa(device, i + 1))
2386 update_sm_ah(&sa_dev->port[i].update_task);
2387 }
2388
2389 return;
2390
2391 err:
2392 while (--i >= 0) {
2393 if (rdma_cap_ib_sa(device, i + 1))
2394 ib_unregister_mad_agent(sa_dev->port[i].agent);
2395 }
2396 free:
2397 kfree(sa_dev);
2398 return;
2399 }
2400
2401 static void ib_sa_remove_one(struct ib_device *device, void *client_data)
2402 {
2403 struct ib_sa_device *sa_dev = client_data;
2404 int i;
2405
2406 if (!sa_dev)
2407 return;
2408
2409 ib_unregister_event_handler(&sa_dev->event_handler);
2410 flush_workqueue(ib_wq);
2411
2412 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
2413 if (rdma_cap_ib_sa(device, i + 1)) {
2414 cancel_delayed_work_sync(&sa_dev->port[i].ib_cpi_work);
2415 ib_unregister_mad_agent(sa_dev->port[i].agent);
2416 if (sa_dev->port[i].sm_ah)
2417 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
2418 }
2419
2420 }
2421
2422 kfree(sa_dev);
2423 }
2424
2425 int ib_sa_init(void)
2426 {
2427 int ret;
2428
2429 get_random_bytes(&tid, sizeof tid);
2430
2431 atomic_set(&ib_nl_sa_request_seq, 0);
2432
2433 ret = ib_register_client(&sa_client);
2434 if (ret) {
2435 pr_err("Couldn't register ib_sa client\n");
2436 goto err1;
2437 }
2438
2439 ret = mcast_init();
2440 if (ret) {
2441 pr_err("Couldn't initialize multicast handling\n");
2442 goto err2;
2443 }
2444
2445 ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM);
2446 if (!ib_nl_wq) {
2447 ret = -ENOMEM;
2448 goto err3;
2449 }
2450
2451 INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
2452
2453 return 0;
2454
2455 err3:
2456 mcast_cleanup();
2457 err2:
2458 ib_unregister_client(&sa_client);
2459 err1:
2460 return ret;
2461 }
2462
2463 void ib_sa_cleanup(void)
2464 {
2465 cancel_delayed_work(&ib_nl_timed_work);
2466 flush_workqueue(ib_nl_wq);
2467 destroy_workqueue(ib_nl_wq);
2468 mcast_cleanup();
2469 ib_unregister_client(&sa_client);
2470 WARN_ON(!xa_empty(&queries));
2471 }
Linux with added FPC-III support