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locking/refcounts: Include fewer headers in <linux/refcount.h>
[linux/fpc-iii.git] / drivers / infiniband / core / sa_query.c
bloba61ec7e33613e9f99e5a02794e763e77836663c0
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/idr.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_SPINLOCK(idr_lock);
187 static DEFINE_IDR(query_idr);
188
189 static DEFINE_SPINLOCK(tid_lock);
190 static u32 tid;
191
192 #define PATH_REC_FIELD(field) \
193 .struct_offset_bytes = offsetof(struct sa_path_rec, field), \
194 .struct_size_bytes = sizeof((struct sa_path_rec *)0)->field, \
195 .field_name = "sa_path_rec:" #field
196
197 static const struct ib_field path_rec_table[] = {
198 { PATH_REC_FIELD(service_id),
199 .offset_words = 0,
200 .offset_bits = 0,
201 .size_bits = 64 },
202 { PATH_REC_FIELD(dgid),
203 .offset_words = 2,
204 .offset_bits = 0,
205 .size_bits = 128 },
206 { PATH_REC_FIELD(sgid),
207 .offset_words = 6,
208 .offset_bits = 0,
209 .size_bits = 128 },
210 { PATH_REC_FIELD(ib.dlid),
211 .offset_words = 10,
212 .offset_bits = 0,
213 .size_bits = 16 },
214 { PATH_REC_FIELD(ib.slid),
215 .offset_words = 10,
216 .offset_bits = 16,
217 .size_bits = 16 },
218 { PATH_REC_FIELD(ib.raw_traffic),
219 .offset_words = 11,
220 .offset_bits = 0,
221 .size_bits = 1 },
222 { RESERVED,
223 .offset_words = 11,
224 .offset_bits = 1,
225 .size_bits = 3 },
226 { PATH_REC_FIELD(flow_label),
227 .offset_words = 11,
228 .offset_bits = 4,
229 .size_bits = 20 },
230 { PATH_REC_FIELD(hop_limit),
231 .offset_words = 11,
232 .offset_bits = 24,
233 .size_bits = 8 },
234 { PATH_REC_FIELD(traffic_class),
235 .offset_words = 12,
236 .offset_bits = 0,
237 .size_bits = 8 },
238 { PATH_REC_FIELD(reversible),
239 .offset_words = 12,
240 .offset_bits = 8,
241 .size_bits = 1 },
242 { PATH_REC_FIELD(numb_path),
243 .offset_words = 12,
244 .offset_bits = 9,
245 .size_bits = 7 },
246 { PATH_REC_FIELD(pkey),
247 .offset_words = 12,
248 .offset_bits = 16,
249 .size_bits = 16 },
250 { PATH_REC_FIELD(qos_class),
251 .offset_words = 13,
252 .offset_bits = 0,
253 .size_bits = 12 },
254 { PATH_REC_FIELD(sl),
255 .offset_words = 13,
256 .offset_bits = 12,
257 .size_bits = 4 },
258 { PATH_REC_FIELD(mtu_selector),
259 .offset_words = 13,
260 .offset_bits = 16,
261 .size_bits = 2 },
262 { PATH_REC_FIELD(mtu),
263 .offset_words = 13,
264 .offset_bits = 18,
265 .size_bits = 6 },
266 { PATH_REC_FIELD(rate_selector),
267 .offset_words = 13,
268 .offset_bits = 24,
269 .size_bits = 2 },
270 { PATH_REC_FIELD(rate),
271 .offset_words = 13,
272 .offset_bits = 26,
273 .size_bits = 6 },
274 { PATH_REC_FIELD(packet_life_time_selector),
275 .offset_words = 14,
276 .offset_bits = 0,
277 .size_bits = 2 },
278 { PATH_REC_FIELD(packet_life_time),
279 .offset_words = 14,
280 .offset_bits = 2,
281 .size_bits = 6 },
282 { PATH_REC_FIELD(preference),
283 .offset_words = 14,
284 .offset_bits = 8,
285 .size_bits = 8 },
286 { RESERVED,
287 .offset_words = 14,
288 .offset_bits = 16,
289 .size_bits = 48 },
290 };
291
292 #define OPA_PATH_REC_FIELD(field) \
293 .struct_offset_bytes = \
294 offsetof(struct sa_path_rec, field), \
295 .struct_size_bytes = \
296 sizeof((struct sa_path_rec *)0)->field, \
297 .field_name = "sa_path_rec:" #field
298
299 static const struct ib_field opa_path_rec_table[] = {
300 { OPA_PATH_REC_FIELD(service_id),
301 .offset_words = 0,
302 .offset_bits = 0,
303 .size_bits = 64 },
304 { OPA_PATH_REC_FIELD(dgid),
305 .offset_words = 2,
306 .offset_bits = 0,
307 .size_bits = 128 },
308 { OPA_PATH_REC_FIELD(sgid),
309 .offset_words = 6,
310 .offset_bits = 0,
311 .size_bits = 128 },
312 { OPA_PATH_REC_FIELD(opa.dlid),
313 .offset_words = 10,
314 .offset_bits = 0,
315 .size_bits = 32 },
316 { OPA_PATH_REC_FIELD(opa.slid),
317 .offset_words = 11,
318 .offset_bits = 0,
319 .size_bits = 32 },
320 { OPA_PATH_REC_FIELD(opa.raw_traffic),
321 .offset_words = 12,
322 .offset_bits = 0,
323 .size_bits = 1 },
324 { RESERVED,
325 .offset_words = 12,
326 .offset_bits = 1,
327 .size_bits = 3 },
328 { OPA_PATH_REC_FIELD(flow_label),
329 .offset_words = 12,
330 .offset_bits = 4,
331 .size_bits = 20 },
332 { OPA_PATH_REC_FIELD(hop_limit),
333 .offset_words = 12,
334 .offset_bits = 24,
335 .size_bits = 8 },
336 { OPA_PATH_REC_FIELD(traffic_class),
337 .offset_words = 13,
338 .offset_bits = 0,
339 .size_bits = 8 },
340 { OPA_PATH_REC_FIELD(reversible),
341 .offset_words = 13,
342 .offset_bits = 8,
343 .size_bits = 1 },
344 { OPA_PATH_REC_FIELD(numb_path),
345 .offset_words = 13,
346 .offset_bits = 9,
347 .size_bits = 7 },
348 { OPA_PATH_REC_FIELD(pkey),
349 .offset_words = 13,
350 .offset_bits = 16,
351 .size_bits = 16 },
352 { OPA_PATH_REC_FIELD(opa.l2_8B),
353 .offset_words = 14,
354 .offset_bits = 0,
355 .size_bits = 1 },
356 { OPA_PATH_REC_FIELD(opa.l2_10B),
357 .offset_words = 14,
358 .offset_bits = 1,
359 .size_bits = 1 },
360 { OPA_PATH_REC_FIELD(opa.l2_9B),
361 .offset_words = 14,
362 .offset_bits = 2,
363 .size_bits = 1 },
364 { OPA_PATH_REC_FIELD(opa.l2_16B),
365 .offset_words = 14,
366 .offset_bits = 3,
367 .size_bits = 1 },
368 { RESERVED,
369 .offset_words = 14,
370 .offset_bits = 4,
371 .size_bits = 2 },
372 { OPA_PATH_REC_FIELD(opa.qos_type),
373 .offset_words = 14,
374 .offset_bits = 6,
375 .size_bits = 2 },
376 { OPA_PATH_REC_FIELD(opa.qos_priority),
377 .offset_words = 14,
378 .offset_bits = 8,
379 .size_bits = 8 },
380 { RESERVED,
381 .offset_words = 14,
382 .offset_bits = 16,
383 .size_bits = 3 },
384 { OPA_PATH_REC_FIELD(sl),
385 .offset_words = 14,
386 .offset_bits = 19,
387 .size_bits = 5 },
388 { RESERVED,
389 .offset_words = 14,
390 .offset_bits = 24,
391 .size_bits = 8 },
392 { OPA_PATH_REC_FIELD(mtu_selector),
393 .offset_words = 15,
394 .offset_bits = 0,
395 .size_bits = 2 },
396 { OPA_PATH_REC_FIELD(mtu),
397 .offset_words = 15,
398 .offset_bits = 2,
399 .size_bits = 6 },
400 { OPA_PATH_REC_FIELD(rate_selector),
401 .offset_words = 15,
402 .offset_bits = 8,
403 .size_bits = 2 },
404 { OPA_PATH_REC_FIELD(rate),
405 .offset_words = 15,
406 .offset_bits = 10,
407 .size_bits = 6 },
408 { OPA_PATH_REC_FIELD(packet_life_time_selector),
409 .offset_words = 15,
410 .offset_bits = 16,
411 .size_bits = 2 },
412 { OPA_PATH_REC_FIELD(packet_life_time),
413 .offset_words = 15,
414 .offset_bits = 18,
415 .size_bits = 6 },
416 { OPA_PATH_REC_FIELD(preference),
417 .offset_words = 15,
418 .offset_bits = 24,
419 .size_bits = 8 },
420 };
421
422 #define MCMEMBER_REC_FIELD(field) \
423 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
424 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
425 .field_name = "sa_mcmember_rec:" #field
426
427 static const struct ib_field mcmember_rec_table[] = {
428 { MCMEMBER_REC_FIELD(mgid),
429 .offset_words = 0,
430 .offset_bits = 0,
431 .size_bits = 128 },
432 { MCMEMBER_REC_FIELD(port_gid),
433 .offset_words = 4,
434 .offset_bits = 0,
435 .size_bits = 128 },
436 { MCMEMBER_REC_FIELD(qkey),
437 .offset_words = 8,
438 .offset_bits = 0,
439 .size_bits = 32 },
440 { MCMEMBER_REC_FIELD(mlid),
441 .offset_words = 9,
442 .offset_bits = 0,
443 .size_bits = 16 },
444 { MCMEMBER_REC_FIELD(mtu_selector),
445 .offset_words = 9,
446 .offset_bits = 16,
447 .size_bits = 2 },
448 { MCMEMBER_REC_FIELD(mtu),
449 .offset_words = 9,
450 .offset_bits = 18,
451 .size_bits = 6 },
452 { MCMEMBER_REC_FIELD(traffic_class),
453 .offset_words = 9,
454 .offset_bits = 24,
455 .size_bits = 8 },
456 { MCMEMBER_REC_FIELD(pkey),
457 .offset_words = 10,
458 .offset_bits = 0,
459 .size_bits = 16 },
460 { MCMEMBER_REC_FIELD(rate_selector),
461 .offset_words = 10,
462 .offset_bits = 16,
463 .size_bits = 2 },
464 { MCMEMBER_REC_FIELD(rate),
465 .offset_words = 10,
466 .offset_bits = 18,
467 .size_bits = 6 },
468 { MCMEMBER_REC_FIELD(packet_life_time_selector),
469 .offset_words = 10,
470 .offset_bits = 24,
471 .size_bits = 2 },
472 { MCMEMBER_REC_FIELD(packet_life_time),
473 .offset_words = 10,
474 .offset_bits = 26,
475 .size_bits = 6 },
476 { MCMEMBER_REC_FIELD(sl),
477 .offset_words = 11,
478 .offset_bits = 0,
479 .size_bits = 4 },
480 { MCMEMBER_REC_FIELD(flow_label),
481 .offset_words = 11,
482 .offset_bits = 4,
483 .size_bits = 20 },
484 { MCMEMBER_REC_FIELD(hop_limit),
485 .offset_words = 11,
486 .offset_bits = 24,
487 .size_bits = 8 },
488 { MCMEMBER_REC_FIELD(scope),
489 .offset_words = 12,
490 .offset_bits = 0,
491 .size_bits = 4 },
492 { MCMEMBER_REC_FIELD(join_state),
493 .offset_words = 12,
494 .offset_bits = 4,
495 .size_bits = 4 },
496 { MCMEMBER_REC_FIELD(proxy_join),
497 .offset_words = 12,
498 .offset_bits = 8,
499 .size_bits = 1 },
500 { RESERVED,
501 .offset_words = 12,
502 .offset_bits = 9,
503 .size_bits = 23 },
504 };
505
506 #define SERVICE_REC_FIELD(field) \
507 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
508 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
509 .field_name = "sa_service_rec:" #field
510
511 static const struct ib_field service_rec_table[] = {
512 { SERVICE_REC_FIELD(id),
513 .offset_words = 0,
514 .offset_bits = 0,
515 .size_bits = 64 },
516 { SERVICE_REC_FIELD(gid),
517 .offset_words = 2,
518 .offset_bits = 0,
519 .size_bits = 128 },
520 { SERVICE_REC_FIELD(pkey),
521 .offset_words = 6,
522 .offset_bits = 0,
523 .size_bits = 16 },
524 { SERVICE_REC_FIELD(lease),
525 .offset_words = 7,
526 .offset_bits = 0,
527 .size_bits = 32 },
528 { SERVICE_REC_FIELD(key),
529 .offset_words = 8,
530 .offset_bits = 0,
531 .size_bits = 128 },
532 { SERVICE_REC_FIELD(name),
533 .offset_words = 12,
534 .offset_bits = 0,
535 .size_bits = 64*8 },
536 { SERVICE_REC_FIELD(data8),
537 .offset_words = 28,
538 .offset_bits = 0,
539 .size_bits = 16*8 },
540 { SERVICE_REC_FIELD(data16),
541 .offset_words = 32,
542 .offset_bits = 0,
543 .size_bits = 8*16 },
544 { SERVICE_REC_FIELD(data32),
545 .offset_words = 36,
546 .offset_bits = 0,
547 .size_bits = 4*32 },
548 { SERVICE_REC_FIELD(data64),
549 .offset_words = 40,
550 .offset_bits = 0,
551 .size_bits = 2*64 },
552 };
553
554 #define CLASSPORTINFO_REC_FIELD(field) \
555 .struct_offset_bytes = offsetof(struct ib_class_port_info, field), \
556 .struct_size_bytes = sizeof((struct ib_class_port_info *)0)->field, \
557 .field_name = "ib_class_port_info:" #field
558
559 static const struct ib_field ib_classport_info_rec_table[] = {
560 { CLASSPORTINFO_REC_FIELD(base_version),
561 .offset_words = 0,
562 .offset_bits = 0,
563 .size_bits = 8 },
564 { CLASSPORTINFO_REC_FIELD(class_version),
565 .offset_words = 0,
566 .offset_bits = 8,
567 .size_bits = 8 },
568 { CLASSPORTINFO_REC_FIELD(capability_mask),
569 .offset_words = 0,
570 .offset_bits = 16,
571 .size_bits = 16 },
572 { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
573 .offset_words = 1,
574 .offset_bits = 0,
575 .size_bits = 32 },
576 { CLASSPORTINFO_REC_FIELD(redirect_gid),
577 .offset_words = 2,
578 .offset_bits = 0,
579 .size_bits = 128 },
580 { CLASSPORTINFO_REC_FIELD(redirect_tcslfl),
581 .offset_words = 6,
582 .offset_bits = 0,
583 .size_bits = 32 },
584 { CLASSPORTINFO_REC_FIELD(redirect_lid),
585 .offset_words = 7,
586 .offset_bits = 0,
587 .size_bits = 16 },
588 { CLASSPORTINFO_REC_FIELD(redirect_pkey),
589 .offset_words = 7,
590 .offset_bits = 16,
591 .size_bits = 16 },
592
593 { CLASSPORTINFO_REC_FIELD(redirect_qp),
594 .offset_words = 8,
595 .offset_bits = 0,
596 .size_bits = 32 },
597 { CLASSPORTINFO_REC_FIELD(redirect_qkey),
598 .offset_words = 9,
599 .offset_bits = 0,
600 .size_bits = 32 },
601
602 { CLASSPORTINFO_REC_FIELD(trap_gid),
603 .offset_words = 10,
604 .offset_bits = 0,
605 .size_bits = 128 },
606 { CLASSPORTINFO_REC_FIELD(trap_tcslfl),
607 .offset_words = 14,
608 .offset_bits = 0,
609 .size_bits = 32 },
610
611 { CLASSPORTINFO_REC_FIELD(trap_lid),
612 .offset_words = 15,
613 .offset_bits = 0,
614 .size_bits = 16 },
615 { CLASSPORTINFO_REC_FIELD(trap_pkey),
616 .offset_words = 15,
617 .offset_bits = 16,
618 .size_bits = 16 },
619
620 { CLASSPORTINFO_REC_FIELD(trap_hlqp),
621 .offset_words = 16,
622 .offset_bits = 0,
623 .size_bits = 32 },
624 { CLASSPORTINFO_REC_FIELD(trap_qkey),
625 .offset_words = 17,
626 .offset_bits = 0,
627 .size_bits = 32 },
628 };
629
630 #define OPA_CLASSPORTINFO_REC_FIELD(field) \
631 .struct_offset_bytes =\
632 offsetof(struct opa_class_port_info, field), \
633 .struct_size_bytes = \
634 sizeof((struct opa_class_port_info *)0)->field, \
635 .field_name = "opa_class_port_info:" #field
636
637 static const struct ib_field opa_classport_info_rec_table[] = {
638 { OPA_CLASSPORTINFO_REC_FIELD(base_version),
639 .offset_words = 0,
640 .offset_bits = 0,
641 .size_bits = 8 },
642 { OPA_CLASSPORTINFO_REC_FIELD(class_version),
643 .offset_words = 0,
644 .offset_bits = 8,
645 .size_bits = 8 },
646 { OPA_CLASSPORTINFO_REC_FIELD(cap_mask),
647 .offset_words = 0,
648 .offset_bits = 16,
649 .size_bits = 16 },
650 { OPA_CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
651 .offset_words = 1,
652 .offset_bits = 0,
653 .size_bits = 32 },
654 { OPA_CLASSPORTINFO_REC_FIELD(redirect_gid),
655 .offset_words = 2,
656 .offset_bits = 0,
657 .size_bits = 128 },
658 { OPA_CLASSPORTINFO_REC_FIELD(redirect_tc_fl),
659 .offset_words = 6,
660 .offset_bits = 0,
661 .size_bits = 32 },
662 { OPA_CLASSPORTINFO_REC_FIELD(redirect_lid),
663 .offset_words = 7,
664 .offset_bits = 0,
665 .size_bits = 32 },
666 { OPA_CLASSPORTINFO_REC_FIELD(redirect_sl_qp),
667 .offset_words = 8,
668 .offset_bits = 0,
669 .size_bits = 32 },
670 { OPA_CLASSPORTINFO_REC_FIELD(redirect_qkey),
671 .offset_words = 9,
672 .offset_bits = 0,
673 .size_bits = 32 },
674 { OPA_CLASSPORTINFO_REC_FIELD(trap_gid),
675 .offset_words = 10,
676 .offset_bits = 0,
677 .size_bits = 128 },
678 { OPA_CLASSPORTINFO_REC_FIELD(trap_tc_fl),
679 .offset_words = 14,
680 .offset_bits = 0,
681 .size_bits = 32 },
682 { OPA_CLASSPORTINFO_REC_FIELD(trap_lid),
683 .offset_words = 15,
684 .offset_bits = 0,
685 .size_bits = 32 },
686 { OPA_CLASSPORTINFO_REC_FIELD(trap_hl_qp),
687 .offset_words = 16,
688 .offset_bits = 0,
689 .size_bits = 32 },
690 { OPA_CLASSPORTINFO_REC_FIELD(trap_qkey),
691 .offset_words = 17,
692 .offset_bits = 0,
693 .size_bits = 32 },
694 { OPA_CLASSPORTINFO_REC_FIELD(trap_pkey),
695 .offset_words = 18,
696 .offset_bits = 0,
697 .size_bits = 16 },
698 { OPA_CLASSPORTINFO_REC_FIELD(redirect_pkey),
699 .offset_words = 18,
700 .offset_bits = 16,
701 .size_bits = 16 },
702 { OPA_CLASSPORTINFO_REC_FIELD(trap_sl_rsvd),
703 .offset_words = 19,
704 .offset_bits = 0,
705 .size_bits = 8 },
706 { RESERVED,
707 .offset_words = 19,
708 .offset_bits = 8,
709 .size_bits = 24 },
710 };
711
712 #define GUIDINFO_REC_FIELD(field) \
713 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \
714 .struct_size_bytes = sizeof((struct ib_sa_guidinfo_rec *) 0)->field, \
715 .field_name = "sa_guidinfo_rec:" #field
716
717 static const struct ib_field guidinfo_rec_table[] = {
718 { GUIDINFO_REC_FIELD(lid),
719 .offset_words = 0,
720 .offset_bits = 0,
721 .size_bits = 16 },
722 { GUIDINFO_REC_FIELD(block_num),
723 .offset_words = 0,
724 .offset_bits = 16,
725 .size_bits = 8 },
726 { GUIDINFO_REC_FIELD(res1),
727 .offset_words = 0,
728 .offset_bits = 24,
729 .size_bits = 8 },
730 { GUIDINFO_REC_FIELD(res2),
731 .offset_words = 1,
732 .offset_bits = 0,
733 .size_bits = 32 },
734 { GUIDINFO_REC_FIELD(guid_info_list),
735 .offset_words = 2,
736 .offset_bits = 0,
737 .size_bits = 512 },
738 };
739
740 static inline void ib_sa_disable_local_svc(struct ib_sa_query *query)
741 {
742 query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE;
743 }
744
745 static inline int ib_sa_query_cancelled(struct ib_sa_query *query)
746 {
747 return (query->flags & IB_SA_CANCEL);
748 }
749
750 static void ib_nl_set_path_rec_attrs(struct sk_buff *skb,
751 struct ib_sa_query *query)
752 {
753 struct sa_path_rec *sa_rec = query->mad_buf->context[1];
754 struct ib_sa_mad *mad = query->mad_buf->mad;
755 ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask;
756 u16 val16;
757 u64 val64;
758 struct rdma_ls_resolve_header *header;
759
760 query->mad_buf->context[1] = NULL;
761
762 /* Construct the family header first */
763 header = skb_put(skb, NLMSG_ALIGN(sizeof(*header)));
764 memcpy(header->device_name, query->port->agent->device->name,
765 LS_DEVICE_NAME_MAX);
766 header->port_num = query->port->port_num;
767
768 if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) &&
769 sa_rec->reversible != 0)
770 query->path_use = LS_RESOLVE_PATH_USE_GMP;
771 else
772 query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL;
773 header->path_use = query->path_use;
774
775 /* Now build the attributes */
776 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) {
777 val64 = be64_to_cpu(sa_rec->service_id);
778 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID,
779 sizeof(val64), &val64);
780 }
781 if (comp_mask & IB_SA_PATH_REC_DGID)
782 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID,
783 sizeof(sa_rec->dgid), &sa_rec->dgid);
784 if (comp_mask & IB_SA_PATH_REC_SGID)
785 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID,
786 sizeof(sa_rec->sgid), &sa_rec->sgid);
787 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
788 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS,
789 sizeof(sa_rec->traffic_class), &sa_rec->traffic_class);
790
791 if (comp_mask & IB_SA_PATH_REC_PKEY) {
792 val16 = be16_to_cpu(sa_rec->pkey);
793 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY,
794 sizeof(val16), &val16);
795 }
796 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) {
797 val16 = be16_to_cpu(sa_rec->qos_class);
798 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS,
799 sizeof(val16), &val16);
800 }
801 }
802
803 static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask)
804 {
805 int len = 0;
806
807 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID)
808 len += nla_total_size(sizeof(u64));
809 if (comp_mask & IB_SA_PATH_REC_DGID)
810 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
811 if (comp_mask & IB_SA_PATH_REC_SGID)
812 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
813 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
814 len += nla_total_size(sizeof(u8));
815 if (comp_mask & IB_SA_PATH_REC_PKEY)
816 len += nla_total_size(sizeof(u16));
817 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS)
818 len += nla_total_size(sizeof(u16));
819
820 /*
821 * Make sure that at least some of the required comp_mask bits are
822 * set.
823 */
824 if (WARN_ON(len == 0))
825 return len;
826
827 /* Add the family header */
828 len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header));
829
830 return len;
831 }
832
833 static int ib_nl_send_msg(struct ib_sa_query *query, gfp_t gfp_mask)
834 {
835 struct sk_buff *skb = NULL;
836 struct nlmsghdr *nlh;
837 void *data;
838 int ret = 0;
839 struct ib_sa_mad *mad;
840 int len;
841
842 mad = query->mad_buf->mad;
843 len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask);
844 if (len <= 0)
845 return -EMSGSIZE;
846
847 skb = nlmsg_new(len, gfp_mask);
848 if (!skb)
849 return -ENOMEM;
850
851 /* Put nlmsg header only for now */
852 data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS,
853 RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST);
854 if (!data) {
855 nlmsg_free(skb);
856 return -EMSGSIZE;
857 }
858
859 /* Add attributes */
860 ib_nl_set_path_rec_attrs(skb, query);
861
862 /* Repair the nlmsg header length */
863 nlmsg_end(skb, nlh);
864
865 ret = rdma_nl_multicast(skb, RDMA_NL_GROUP_LS, gfp_mask);
866 if (!ret)
867 ret = len;
868 else
869 ret = 0;
870
871 return ret;
872 }
873
874 static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
875 {
876 unsigned long flags;
877 unsigned long delay;
878 int ret;
879
880 INIT_LIST_HEAD(&query->list);
881 query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq);
882
883 /* Put the request on the list first.*/
884 spin_lock_irqsave(&ib_nl_request_lock, flags);
885 delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
886 query->timeout = delay + jiffies;
887 list_add_tail(&query->list, &ib_nl_request_list);
888 /* Start the timeout if this is the only request */
889 if (ib_nl_request_list.next == &query->list)
890 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
891 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
892
893 ret = ib_nl_send_msg(query, gfp_mask);
894 if (ret <= 0) {
895 ret = -EIO;
896 /* Remove the request */
897 spin_lock_irqsave(&ib_nl_request_lock, flags);
898 list_del(&query->list);
899 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
900 } else {
901 ret = 0;
902 }
903
904 return ret;
905 }
906
907 static int ib_nl_cancel_request(struct ib_sa_query *query)
908 {
909 unsigned long flags;
910 struct ib_sa_query *wait_query;
911 int found = 0;
912
913 spin_lock_irqsave(&ib_nl_request_lock, flags);
914 list_for_each_entry(wait_query, &ib_nl_request_list, list) {
915 /* Let the timeout to take care of the callback */
916 if (query == wait_query) {
917 query->flags |= IB_SA_CANCEL;
918 query->timeout = jiffies;
919 list_move(&query->list, &ib_nl_request_list);
920 found = 1;
921 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1);
922 break;
923 }
924 }
925 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
926
927 return found;
928 }
929
930 static void send_handler(struct ib_mad_agent *agent,
931 struct ib_mad_send_wc *mad_send_wc);
932
933 static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
934 const struct nlmsghdr *nlh)
935 {
936 struct ib_mad_send_wc mad_send_wc;
937 struct ib_sa_mad *mad = NULL;
938 const struct nlattr *head, *curr;
939 struct ib_path_rec_data *rec;
940 int len, rem;
941 u32 mask = 0;
942 int status = -EIO;
943
944 if (query->callback) {
945 head = (const struct nlattr *) nlmsg_data(nlh);
946 len = nlmsg_len(nlh);
947 switch (query->path_use) {
948 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL:
949 mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND;
950 break;
951
952 case LS_RESOLVE_PATH_USE_ALL:
953 case LS_RESOLVE_PATH_USE_GMP:
954 default:
955 mask = IB_PATH_PRIMARY | IB_PATH_GMP |
956 IB_PATH_BIDIRECTIONAL;
957 break;
958 }
959 nla_for_each_attr(curr, head, len, rem) {
960 if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
961 rec = nla_data(curr);
962 /*
963 * Get the first one. In the future, we may
964 * need to get up to 6 pathrecords.
965 */
966 if ((rec->flags & mask) == mask) {
967 mad = query->mad_buf->mad;
968 mad->mad_hdr.method |=
969 IB_MGMT_METHOD_RESP;
970 memcpy(mad->data, rec->path_rec,
971 sizeof(rec->path_rec));
972 status = 0;
973 break;
974 }
975 }
976 }
977 query->callback(query, status, mad);
978 }
979
980 mad_send_wc.send_buf = query->mad_buf;
981 mad_send_wc.status = IB_WC_SUCCESS;
982 send_handler(query->mad_buf->mad_agent, &mad_send_wc);
983 }
984
985 static void ib_nl_request_timeout(struct work_struct *work)
986 {
987 unsigned long flags;
988 struct ib_sa_query *query;
989 unsigned long delay;
990 struct ib_mad_send_wc mad_send_wc;
991 int ret;
992
993 spin_lock_irqsave(&ib_nl_request_lock, flags);
994 while (!list_empty(&ib_nl_request_list)) {
995 query = list_entry(ib_nl_request_list.next,
996 struct ib_sa_query, list);
997
998 if (time_after(query->timeout, jiffies)) {
999 delay = query->timeout - jiffies;
1000 if ((long)delay <= 0)
1001 delay = 1;
1002 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
1003 break;
1004 }
1005
1006 list_del(&query->list);
1007 ib_sa_disable_local_svc(query);
1008 /* Hold the lock to protect against query cancellation */
1009 if (ib_sa_query_cancelled(query))
1010 ret = -1;
1011 else
1012 ret = ib_post_send_mad(query->mad_buf, NULL);
1013 if (ret) {
1014 mad_send_wc.send_buf = query->mad_buf;
1015 mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
1016 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1017 send_handler(query->port->agent, &mad_send_wc);
1018 spin_lock_irqsave(&ib_nl_request_lock, flags);
1019 }
1020 }
1021 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1022 }
1023
1024 int ib_nl_handle_set_timeout(struct sk_buff *skb,
1025 struct nlmsghdr *nlh,
1026 struct netlink_ext_ack *extack)
1027 {
1028 int timeout, delta, abs_delta;
1029 const struct nlattr *attr;
1030 unsigned long flags;
1031 struct ib_sa_query *query;
1032 long delay = 0;
1033 struct nlattr *tb[LS_NLA_TYPE_MAX];
1034 int ret;
1035
1036 if (!(nlh->nlmsg_flags & NLM_F_REQUEST) ||
1037 !(NETLINK_CB(skb).sk))
1038 return -EPERM;
1039
1040 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1041 nlmsg_len(nlh), ib_nl_policy, NULL);
1042 attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT];
1043 if (ret || !attr)
1044 goto settimeout_out;
1045
1046 timeout = *(int *) nla_data(attr);
1047 if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN)
1048 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN;
1049 if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX)
1050 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX;
1051
1052 delta = timeout - sa_local_svc_timeout_ms;
1053 if (delta < 0)
1054 abs_delta = -delta;
1055 else
1056 abs_delta = delta;
1057
1058 if (delta != 0) {
1059 spin_lock_irqsave(&ib_nl_request_lock, flags);
1060 sa_local_svc_timeout_ms = timeout;
1061 list_for_each_entry(query, &ib_nl_request_list, list) {
1062 if (delta < 0 && abs_delta > query->timeout)
1063 query->timeout = 0;
1064 else
1065 query->timeout += delta;
1066
1067 /* Get the new delay from the first entry */
1068 if (!delay) {
1069 delay = query->timeout - jiffies;
1070 if (delay <= 0)
1071 delay = 1;
1072 }
1073 }
1074 if (delay)
1075 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work,
1076 (unsigned long)delay);
1077 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1078 }
1079
1080 settimeout_out:
1081 return skb->len;
1082 }
1083
1084 static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh)
1085 {
1086 struct nlattr *tb[LS_NLA_TYPE_MAX];
1087 int ret;
1088
1089 if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR)
1090 return 0;
1091
1092 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1093 nlmsg_len(nlh), ib_nl_policy, NULL);
1094 if (ret)
1095 return 0;
1096
1097 return 1;
1098 }
1099
1100 int ib_nl_handle_resolve_resp(struct sk_buff *skb,
1101 struct nlmsghdr *nlh,
1102 struct netlink_ext_ack *extack)
1103 {
1104 unsigned long flags;
1105 struct ib_sa_query *query;
1106 struct ib_mad_send_buf *send_buf;
1107 struct ib_mad_send_wc mad_send_wc;
1108 int found = 0;
1109 int ret;
1110
1111 if ((nlh->nlmsg_flags & NLM_F_REQUEST) ||
1112 !(NETLINK_CB(skb).sk))
1113 return -EPERM;
1114
1115 spin_lock_irqsave(&ib_nl_request_lock, flags);
1116 list_for_each_entry(query, &ib_nl_request_list, list) {
1117 /*
1118 * If the query is cancelled, let the timeout routine
1119 * take care of it.
1120 */
1121 if (nlh->nlmsg_seq == query->seq) {
1122 found = !ib_sa_query_cancelled(query);
1123 if (found)
1124 list_del(&query->list);
1125 break;
1126 }
1127 }
1128
1129 if (!found) {
1130 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1131 goto resp_out;
1132 }
1133
1134 send_buf = query->mad_buf;
1135
1136 if (!ib_nl_is_good_resolve_resp(nlh)) {
1137 /* if the result is a failure, send out the packet via IB */
1138 ib_sa_disable_local_svc(query);
1139 ret = ib_post_send_mad(query->mad_buf, NULL);
1140 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1141 if (ret) {
1142 mad_send_wc.send_buf = send_buf;
1143 mad_send_wc.status = IB_WC_GENERAL_ERR;
1144 send_handler(query->port->agent, &mad_send_wc);
1145 }
1146 } else {
1147 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1148 ib_nl_process_good_resolve_rsp(query, nlh);
1149 }
1150
1151 resp_out:
1152 return skb->len;
1153 }
1154
1155 static void free_sm_ah(struct kref *kref)
1156 {
1157 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
1158
1159 rdma_destroy_ah(sm_ah->ah);
1160 kfree(sm_ah);
1161 }
1162
1163 void ib_sa_register_client(struct ib_sa_client *client)
1164 {
1165 atomic_set(&client->users, 1);
1166 init_completion(&client->comp);
1167 }
1168 EXPORT_SYMBOL(ib_sa_register_client);
1169
1170 void ib_sa_unregister_client(struct ib_sa_client *client)
1171 {
1172 ib_sa_client_put(client);
1173 wait_for_completion(&client->comp);
1174 }
1175 EXPORT_SYMBOL(ib_sa_unregister_client);
1176
1177 /**
1178 * ib_sa_cancel_query - try to cancel an SA query
1179 * @id:ID of query to cancel
1180 * @query:query pointer to cancel
1181 *
1182 * Try to cancel an SA query. If the id and query don't match up or
1183 * the query has already completed, nothing is done. Otherwise the
1184 * query is canceled and will complete with a status of -EINTR.
1185 */
1186 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
1187 {
1188 unsigned long flags;
1189 struct ib_mad_agent *agent;
1190 struct ib_mad_send_buf *mad_buf;
1191
1192 spin_lock_irqsave(&idr_lock, flags);
1193 if (idr_find(&query_idr, id) != query) {
1194 spin_unlock_irqrestore(&idr_lock, flags);
1195 return;
1196 }
1197 agent = query->port->agent;
1198 mad_buf = query->mad_buf;
1199 spin_unlock_irqrestore(&idr_lock, flags);
1200
1201 /*
1202 * If the query is still on the netlink request list, schedule
1203 * it to be cancelled by the timeout routine. Otherwise, it has been
1204 * sent to the MAD layer and has to be cancelled from there.
1205 */
1206 if (!ib_nl_cancel_request(query))
1207 ib_cancel_mad(agent, mad_buf);
1208 }
1209 EXPORT_SYMBOL(ib_sa_cancel_query);
1210
1211 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
1212 {
1213 struct ib_sa_device *sa_dev;
1214 struct ib_sa_port *port;
1215 unsigned long flags;
1216 u8 src_path_mask;
1217
1218 sa_dev = ib_get_client_data(device, &sa_client);
1219 if (!sa_dev)
1220 return 0x7f;
1221
1222 port = &sa_dev->port[port_num - sa_dev->start_port];
1223 spin_lock_irqsave(&port->ah_lock, flags);
1224 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
1225 spin_unlock_irqrestore(&port->ah_lock, flags);
1226
1227 return src_path_mask;
1228 }
1229
1230 static int
1231 roce_resolve_route_from_path(struct ib_device *device, u8 port_num,
1232 struct sa_path_rec *rec)
1233 {
1234 struct net_device *resolved_dev;
1235 struct net_device *ndev;
1236 struct net_device *idev;
1237 struct rdma_dev_addr dev_addr = {
1238 .bound_dev_if = ((sa_path_get_ifindex(rec) >= 0) ?
1239 sa_path_get_ifindex(rec) : 0),
1240 .net = sa_path_get_ndev(rec) ?
1241 sa_path_get_ndev(rec) :
1242 &init_net
1243 };
1244 union {
1245 struct sockaddr _sockaddr;
1246 struct sockaddr_in _sockaddr_in;
1247 struct sockaddr_in6 _sockaddr_in6;
1248 } sgid_addr, dgid_addr;
1249 int ret;
1250
1251 if (rec->roce.route_resolved)
1252 return 0;
1253
1254 if (!device->get_netdev)
1255 return -EOPNOTSUPP;
1256
1257 rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid);
1258 rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid);
1259
1260 /* validate the route */
1261 ret = rdma_resolve_ip_route(&sgid_addr._sockaddr,
1262 &dgid_addr._sockaddr, &dev_addr);
1263 if (ret)
1264 return ret;
1265
1266 if ((dev_addr.network == RDMA_NETWORK_IPV4 ||
1267 dev_addr.network == RDMA_NETWORK_IPV6) &&
1268 rec->rec_type != SA_PATH_REC_TYPE_ROCE_V2)
1269 return -EINVAL;
1270
1271 idev = device->get_netdev(device, port_num);
1272 if (!idev)
1273 return -ENODEV;
1274
1275 resolved_dev = dev_get_by_index(dev_addr.net,
1276 dev_addr.bound_dev_if);
1277 if (!resolved_dev) {
1278 ret = -ENODEV;
1279 goto done;
1280 }
1281 ndev = ib_get_ndev_from_path(rec);
1282 rcu_read_lock();
1283 if ((ndev && ndev != resolved_dev) ||
1284 (resolved_dev != idev &&
1285 !rdma_is_upper_dev_rcu(idev, resolved_dev)))
1286 ret = -EHOSTUNREACH;
1287 rcu_read_unlock();
1288 dev_put(resolved_dev);
1289 if (ndev)
1290 dev_put(ndev);
1291 done:
1292 dev_put(idev);
1293 if (!ret)
1294 rec->roce.route_resolved = true;
1295 return ret;
1296 }
1297
1298 static int init_ah_attr_grh_fields(struct ib_device *device, u8 port_num,
1299 struct sa_path_rec *rec,
1300 struct rdma_ah_attr *ah_attr)
1301 {
1302 enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec);
1303 struct net_device *ndev;
1304 u16 gid_index;
1305 int ret;
1306
1307 ndev = ib_get_ndev_from_path(rec);
1308 ret = ib_find_cached_gid_by_port(device, &rec->sgid, type,
1309 port_num, ndev, &gid_index);
1310 if (ndev)
1311 dev_put(ndev);
1312 if (ret)
1313 return ret;
1314
1315 rdma_ah_set_grh(ah_attr, &rec->dgid,
1316 be32_to_cpu(rec->flow_label),
1317 gid_index, rec->hop_limit,
1318 rec->traffic_class);
1319 return 0;
1320 }
1321
1322 int ib_init_ah_attr_from_path(struct ib_device *device, u8 port_num,
1323 struct sa_path_rec *rec,
1324 struct rdma_ah_attr *ah_attr)
1325 {
1326 int ret = 0;
1327
1328 memset(ah_attr, 0, sizeof(*ah_attr));
1329 ah_attr->type = rdma_ah_find_type(device, port_num);
1330 rdma_ah_set_sl(ah_attr, rec->sl);
1331 rdma_ah_set_port_num(ah_attr, port_num);
1332 rdma_ah_set_static_rate(ah_attr, rec->rate);
1333
1334 if (sa_path_is_roce(rec)) {
1335 ret = roce_resolve_route_from_path(device, port_num, rec);
1336 if (ret)
1337 return ret;
1338
1339 memcpy(ah_attr->roce.dmac, sa_path_get_dmac(rec), ETH_ALEN);
1340 } else {
1341 rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec)));
1342 if (sa_path_is_opa(rec) &&
1343 rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE))
1344 rdma_ah_set_make_grd(ah_attr, true);
1345
1346 rdma_ah_set_path_bits(ah_attr,
1347 be32_to_cpu(sa_path_get_slid(rec)) &
1348 get_src_path_mask(device, port_num));
1349 }
1350
1351 if (rec->hop_limit > 0 || sa_path_is_roce(rec))
1352 ret = init_ah_attr_grh_fields(device, port_num, rec, ah_attr);
1353 return ret;
1354 }
1355 EXPORT_SYMBOL(ib_init_ah_attr_from_path);
1356
1357 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1358 {
1359 struct rdma_ah_attr ah_attr;
1360 unsigned long flags;
1361
1362 spin_lock_irqsave(&query->port->ah_lock, flags);
1363 if (!query->port->sm_ah) {
1364 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1365 return -EAGAIN;
1366 }
1367 kref_get(&query->port->sm_ah->ref);
1368 query->sm_ah = query->port->sm_ah;
1369 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1370
1371 /*
1372 * Always check if sm_ah has valid dlid assigned,
1373 * before querying for class port info
1374 */
1375 if ((rdma_query_ah(query->sm_ah->ah, &ah_attr) < 0) ||
1376 !rdma_is_valid_unicast_lid(&ah_attr)) {
1377 kref_put(&query->sm_ah->ref, free_sm_ah);
1378 return -EAGAIN;
1379 }
1380 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1381 query->sm_ah->pkey_index,
1382 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
1383 gfp_mask,
1384 ((query->flags & IB_SA_QUERY_OPA) ?
1385 OPA_MGMT_BASE_VERSION :
1386 IB_MGMT_BASE_VERSION));
1387 if (IS_ERR(query->mad_buf)) {
1388 kref_put(&query->sm_ah->ref, free_sm_ah);
1389 return -ENOMEM;
1390 }
1391
1392 query->mad_buf->ah = query->sm_ah->ah;
1393
1394 return 0;
1395 }
1396
1397 static void free_mad(struct ib_sa_query *query)
1398 {
1399 ib_free_send_mad(query->mad_buf);
1400 kref_put(&query->sm_ah->ref, free_sm_ah);
1401 }
1402
1403 static void init_mad(struct ib_sa_query *query, struct ib_mad_agent *agent)
1404 {
1405 struct ib_sa_mad *mad = query->mad_buf->mad;
1406 unsigned long flags;
1407
1408 memset(mad, 0, sizeof *mad);
1409
1410 if (query->flags & IB_SA_QUERY_OPA) {
1411 mad->mad_hdr.base_version = OPA_MGMT_BASE_VERSION;
1412 mad->mad_hdr.class_version = OPA_SA_CLASS_VERSION;
1413 } else {
1414 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
1415 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1416 }
1417 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
1418 spin_lock_irqsave(&tid_lock, flags);
1419 mad->mad_hdr.tid =
1420 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1421 spin_unlock_irqrestore(&tid_lock, flags);
1422 }
1423
1424 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
1425 {
1426 bool preload = gfpflags_allow_blocking(gfp_mask);
1427 unsigned long flags;
1428 int ret, id;
1429
1430 if (preload)
1431 idr_preload(gfp_mask);
1432 spin_lock_irqsave(&idr_lock, flags);
1433
1434 id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
1435
1436 spin_unlock_irqrestore(&idr_lock, flags);
1437 if (preload)
1438 idr_preload_end();
1439 if (id < 0)
1440 return id;
1441
1442 query->mad_buf->timeout_ms = timeout_ms;
1443 query->mad_buf->context[0] = query;
1444 query->id = id;
1445
1446 if ((query->flags & IB_SA_ENABLE_LOCAL_SERVICE) &&
1447 (!(query->flags & IB_SA_QUERY_OPA))) {
1448 if (!rdma_nl_chk_listeners(RDMA_NL_GROUP_LS)) {
1449 if (!ib_nl_make_request(query, gfp_mask))
1450 return id;
1451 }
1452 ib_sa_disable_local_svc(query);
1453 }
1454
1455 ret = ib_post_send_mad(query->mad_buf, NULL);
1456 if (ret) {
1457 spin_lock_irqsave(&idr_lock, flags);
1458 idr_remove(&query_idr, id);
1459 spin_unlock_irqrestore(&idr_lock, flags);
1460 }
1461
1462 /*
1463 * It's not safe to dereference query any more, because the
1464 * send may already have completed and freed the query in
1465 * another context.
1466 */
1467 return ret ? ret : id;
1468 }
1469
1470 void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec)
1471 {
1472 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1473 }
1474 EXPORT_SYMBOL(ib_sa_unpack_path);
1475
1476 void ib_sa_pack_path(struct sa_path_rec *rec, void *attribute)
1477 {
1478 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1479 }
1480 EXPORT_SYMBOL(ib_sa_pack_path);
1481
1482 static bool ib_sa_opa_pathrecord_support(struct ib_sa_client *client,
1483 struct ib_device *device,
1484 u8 port_num)
1485 {
1486 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1487 struct ib_sa_port *port;
1488 unsigned long flags;
1489 bool ret = false;
1490
1491 if (!sa_dev)
1492 return ret;
1493
1494 port = &sa_dev->port[port_num - sa_dev->start_port];
1495 spin_lock_irqsave(&port->classport_lock, flags);
1496 if (!port->classport_info.valid)
1497 goto ret;
1498
1499 if (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_OPA)
1500 ret = opa_get_cpi_capmask2(&port->classport_info.data.opa) &
1501 OPA_CLASS_PORT_INFO_PR_SUPPORT;
1502 ret:
1503 spin_unlock_irqrestore(&port->classport_lock, flags);
1504 return ret;
1505 }
1506
1507 enum opa_pr_supported {
1508 PR_NOT_SUPPORTED,
1509 PR_OPA_SUPPORTED,
1510 PR_IB_SUPPORTED
1511 };
1512
1513 /**
1514 * Check if current PR query can be an OPA query.
1515 * Retuns PR_NOT_SUPPORTED if a path record query is not
1516 * possible, PR_OPA_SUPPORTED if an OPA path record query
1517 * is possible and PR_IB_SUPPORTED if an IB path record
1518 * query is possible.
1519 */
1520 static int opa_pr_query_possible(struct ib_sa_client *client,
1521 struct ib_device *device,
1522 u8 port_num,
1523 struct sa_path_rec *rec)
1524 {
1525 struct ib_port_attr port_attr;
1526
1527 if (ib_query_port(device, port_num, &port_attr))
1528 return PR_NOT_SUPPORTED;
1529
1530 if (ib_sa_opa_pathrecord_support(client, device, port_num))
1531 return PR_OPA_SUPPORTED;
1532
1533 if (port_attr.lid >= be16_to_cpu(IB_MULTICAST_LID_BASE))
1534 return PR_NOT_SUPPORTED;
1535 else
1536 return PR_IB_SUPPORTED;
1537 }
1538
1539 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1540 int status,
1541 struct ib_sa_mad *mad)
1542 {
1543 struct ib_sa_path_query *query =
1544 container_of(sa_query, struct ib_sa_path_query, sa_query);
1545
1546 if (mad) {
1547 struct sa_path_rec rec;
1548
1549 if (sa_query->flags & IB_SA_QUERY_OPA) {
1550 ib_unpack(opa_path_rec_table,
1551 ARRAY_SIZE(opa_path_rec_table),
1552 mad->data, &rec);
1553 rec.rec_type = SA_PATH_REC_TYPE_OPA;
1554 query->callback(status, &rec, query->context);
1555 } else {
1556 ib_unpack(path_rec_table,
1557 ARRAY_SIZE(path_rec_table),
1558 mad->data, &rec);
1559 rec.rec_type = SA_PATH_REC_TYPE_IB;
1560 sa_path_set_ndev(&rec, NULL);
1561 sa_path_set_ifindex(&rec, 0);
1562 sa_path_set_dmac_zero(&rec);
1563
1564 if (query->conv_pr) {
1565 struct sa_path_rec opa;
1566
1567 memset(&opa, 0, sizeof(struct sa_path_rec));
1568 sa_convert_path_ib_to_opa(&opa, &rec);
1569 query->callback(status, &opa, query->context);
1570 } else {
1571 query->callback(status, &rec, query->context);
1572 }
1573 }
1574 } else
1575 query->callback(status, NULL, query->context);
1576 }
1577
1578 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1579 {
1580 struct ib_sa_path_query *query =
1581 container_of(sa_query, struct ib_sa_path_query, sa_query);
1582
1583 kfree(query->conv_pr);
1584 kfree(query);
1585 }
1586
1587 /**
1588 * ib_sa_path_rec_get - Start a Path get query
1589 * @client:SA client
1590 * @device:device to send query on
1591 * @port_num: port number to send query on
1592 * @rec:Path Record to send in query
1593 * @comp_mask:component mask to send in query
1594 * @timeout_ms:time to wait for response
1595 * @gfp_mask:GFP mask to use for internal allocations
1596 * @callback:function called when query completes, times out or is
1597 * canceled
1598 * @context:opaque user context passed to callback
1599 * @sa_query:query context, used to cancel query
1600 *
1601 * Send a Path Record Get query to the SA to look up a path. The
1602 * callback function will be called when the query completes (or
1603 * fails); status is 0 for a successful response, -EINTR if the query
1604 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1605 * occurred sending the query. The resp parameter of the callback is
1606 * only valid if status is 0.
1607 *
1608 * If the return value of ib_sa_path_rec_get() is negative, it is an
1609 * error code. Otherwise it is a query ID that can be used to cancel
1610 * the query.
1611 */
1612 int ib_sa_path_rec_get(struct ib_sa_client *client,
1613 struct ib_device *device, u8 port_num,
1614 struct sa_path_rec *rec,
1615 ib_sa_comp_mask comp_mask,
1616 int timeout_ms, gfp_t gfp_mask,
1617 void (*callback)(int status,
1618 struct sa_path_rec *resp,
1619 void *context),
1620 void *context,
1621 struct ib_sa_query **sa_query)
1622 {
1623 struct ib_sa_path_query *query;
1624 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1625 struct ib_sa_port *port;
1626 struct ib_mad_agent *agent;
1627 struct ib_sa_mad *mad;
1628 enum opa_pr_supported status;
1629 int ret;
1630
1631 if (!sa_dev)
1632 return -ENODEV;
1633
1634 if ((rec->rec_type != SA_PATH_REC_TYPE_IB) &&
1635 (rec->rec_type != SA_PATH_REC_TYPE_OPA))
1636 return -EINVAL;
1637
1638 port = &sa_dev->port[port_num - sa_dev->start_port];
1639 agent = port->agent;
1640
1641 query = kzalloc(sizeof(*query), gfp_mask);
1642 if (!query)
1643 return -ENOMEM;
1644
1645 query->sa_query.port = port;
1646 if (rec->rec_type == SA_PATH_REC_TYPE_OPA) {
1647 status = opa_pr_query_possible(client, device, port_num, rec);
1648 if (status == PR_NOT_SUPPORTED) {
1649 ret = -EINVAL;
1650 goto err1;
1651 } else if (status == PR_OPA_SUPPORTED) {
1652 query->sa_query.flags |= IB_SA_QUERY_OPA;
1653 } else {
1654 query->conv_pr =
1655 kmalloc(sizeof(*query->conv_pr), gfp_mask);
1656 if (!query->conv_pr) {
1657 ret = -ENOMEM;
1658 goto err1;
1659 }
1660 }
1661 }
1662
1663 ret = alloc_mad(&query->sa_query, gfp_mask);
1664 if (ret)
1665 goto err2;
1666
1667 ib_sa_client_get(client);
1668 query->sa_query.client = client;
1669 query->callback = callback;
1670 query->context = context;
1671
1672 mad = query->sa_query.mad_buf->mad;
1673 init_mad(&query->sa_query, agent);
1674
1675 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1676 query->sa_query.release = ib_sa_path_rec_release;
1677 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1678 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1679 mad->sa_hdr.comp_mask = comp_mask;
1680
1681 if (query->sa_query.flags & IB_SA_QUERY_OPA) {
1682 ib_pack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table),
1683 rec, mad->data);
1684 } else if (query->conv_pr) {
1685 sa_convert_path_opa_to_ib(query->conv_pr, rec);
1686 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1687 query->conv_pr, mad->data);
1688 } else {
1689 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1690 rec, mad->data);
1691 }
1692
1693 *sa_query = &query->sa_query;
1694
1695 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1696 query->sa_query.mad_buf->context[1] = (query->conv_pr) ?
1697 query->conv_pr : rec;
1698
1699 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1700 if (ret < 0)
1701 goto err3;
1702
1703 return ret;
1704
1705 err3:
1706 *sa_query = NULL;
1707 ib_sa_client_put(query->sa_query.client);
1708 free_mad(&query->sa_query);
1709 err2:
1710 kfree(query->conv_pr);
1711 err1:
1712 kfree(query);
1713 return ret;
1714 }
1715 EXPORT_SYMBOL(ib_sa_path_rec_get);
1716
1717 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1718 int status,
1719 struct ib_sa_mad *mad)
1720 {
1721 struct ib_sa_service_query *query =
1722 container_of(sa_query, struct ib_sa_service_query, sa_query);
1723
1724 if (mad) {
1725 struct ib_sa_service_rec rec;
1726
1727 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1728 mad->data, &rec);
1729 query->callback(status, &rec, query->context);
1730 } else
1731 query->callback(status, NULL, query->context);
1732 }
1733
1734 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1735 {
1736 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1737 }
1738
1739 /**
1740 * ib_sa_service_rec_query - Start Service Record operation
1741 * @client:SA client
1742 * @device:device to send request on
1743 * @port_num: port number to send request on
1744 * @method:SA method - should be get, set, or delete
1745 * @rec:Service Record to send in request
1746 * @comp_mask:component mask to send in request
1747 * @timeout_ms:time to wait for response
1748 * @gfp_mask:GFP mask to use for internal allocations
1749 * @callback:function called when request completes, times out or is
1750 * canceled
1751 * @context:opaque user context passed to callback
1752 * @sa_query:request context, used to cancel request
1753 *
1754 * Send a Service Record set/get/delete to the SA to register,
1755 * unregister or query a service record.
1756 * The callback function will be called when the request completes (or
1757 * fails); status is 0 for a successful response, -EINTR if the query
1758 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1759 * occurred sending the query. The resp parameter of the callback is
1760 * only valid if status is 0.
1761 *
1762 * If the return value of ib_sa_service_rec_query() is negative, it is an
1763 * error code. Otherwise it is a request ID that can be used to cancel
1764 * the query.
1765 */
1766 int ib_sa_service_rec_query(struct ib_sa_client *client,
1767 struct ib_device *device, u8 port_num, u8 method,
1768 struct ib_sa_service_rec *rec,
1769 ib_sa_comp_mask comp_mask,
1770 int timeout_ms, gfp_t gfp_mask,
1771 void (*callback)(int status,
1772 struct ib_sa_service_rec *resp,
1773 void *context),
1774 void *context,
1775 struct ib_sa_query **sa_query)
1776 {
1777 struct ib_sa_service_query *query;
1778 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1779 struct ib_sa_port *port;
1780 struct ib_mad_agent *agent;
1781 struct ib_sa_mad *mad;
1782 int ret;
1783
1784 if (!sa_dev)
1785 return -ENODEV;
1786
1787 port = &sa_dev->port[port_num - sa_dev->start_port];
1788 agent = port->agent;
1789
1790 if (method != IB_MGMT_METHOD_GET &&
1791 method != IB_MGMT_METHOD_SET &&
1792 method != IB_SA_METHOD_DELETE)
1793 return -EINVAL;
1794
1795 query = kzalloc(sizeof(*query), gfp_mask);
1796 if (!query)
1797 return -ENOMEM;
1798
1799 query->sa_query.port = port;
1800 ret = alloc_mad(&query->sa_query, gfp_mask);
1801 if (ret)
1802 goto err1;
1803
1804 ib_sa_client_get(client);
1805 query->sa_query.client = client;
1806 query->callback = callback;
1807 query->context = context;
1808
1809 mad = query->sa_query.mad_buf->mad;
1810 init_mad(&query->sa_query, agent);
1811
1812 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1813 query->sa_query.release = ib_sa_service_rec_release;
1814 mad->mad_hdr.method = method;
1815 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1816 mad->sa_hdr.comp_mask = comp_mask;
1817
1818 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
1819 rec, mad->data);
1820
1821 *sa_query = &query->sa_query;
1822
1823 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1824 if (ret < 0)
1825 goto err2;
1826
1827 return ret;
1828
1829 err2:
1830 *sa_query = NULL;
1831 ib_sa_client_put(query->sa_query.client);
1832 free_mad(&query->sa_query);
1833
1834 err1:
1835 kfree(query);
1836 return ret;
1837 }
1838 EXPORT_SYMBOL(ib_sa_service_rec_query);
1839
1840 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1841 int status,
1842 struct ib_sa_mad *mad)
1843 {
1844 struct ib_sa_mcmember_query *query =
1845 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1846
1847 if (mad) {
1848 struct ib_sa_mcmember_rec rec;
1849
1850 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1851 mad->data, &rec);
1852 query->callback(status, &rec, query->context);
1853 } else
1854 query->callback(status, NULL, query->context);
1855 }
1856
1857 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1858 {
1859 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1860 }
1861
1862 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1863 struct ib_device *device, u8 port_num,
1864 u8 method,
1865 struct ib_sa_mcmember_rec *rec,
1866 ib_sa_comp_mask comp_mask,
1867 int timeout_ms, gfp_t gfp_mask,
1868 void (*callback)(int status,
1869 struct ib_sa_mcmember_rec *resp,
1870 void *context),
1871 void *context,
1872 struct ib_sa_query **sa_query)
1873 {
1874 struct ib_sa_mcmember_query *query;
1875 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1876 struct ib_sa_port *port;
1877 struct ib_mad_agent *agent;
1878 struct ib_sa_mad *mad;
1879 int ret;
1880
1881 if (!sa_dev)
1882 return -ENODEV;
1883
1884 port = &sa_dev->port[port_num - sa_dev->start_port];
1885 agent = port->agent;
1886
1887 query = kzalloc(sizeof(*query), gfp_mask);
1888 if (!query)
1889 return -ENOMEM;
1890
1891 query->sa_query.port = port;
1892 ret = alloc_mad(&query->sa_query, gfp_mask);
1893 if (ret)
1894 goto err1;
1895
1896 ib_sa_client_get(client);
1897 query->sa_query.client = client;
1898 query->callback = callback;
1899 query->context = context;
1900
1901 mad = query->sa_query.mad_buf->mad;
1902 init_mad(&query->sa_query, agent);
1903
1904 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1905 query->sa_query.release = ib_sa_mcmember_rec_release;
1906 mad->mad_hdr.method = method;
1907 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1908 mad->sa_hdr.comp_mask = comp_mask;
1909
1910 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1911 rec, mad->data);
1912
1913 *sa_query = &query->sa_query;
1914
1915 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1916 if (ret < 0)
1917 goto err2;
1918
1919 return ret;
1920
1921 err2:
1922 *sa_query = NULL;
1923 ib_sa_client_put(query->sa_query.client);
1924 free_mad(&query->sa_query);
1925
1926 err1:
1927 kfree(query);
1928 return ret;
1929 }
1930
1931 /* Support GuidInfoRecord */
1932 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1933 int status,
1934 struct ib_sa_mad *mad)
1935 {
1936 struct ib_sa_guidinfo_query *query =
1937 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1938
1939 if (mad) {
1940 struct ib_sa_guidinfo_rec rec;
1941
1942 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1943 mad->data, &rec);
1944 query->callback(status, &rec, query->context);
1945 } else
1946 query->callback(status, NULL, query->context);
1947 }
1948
1949 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1950 {
1951 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1952 }
1953
1954 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1955 struct ib_device *device, u8 port_num,
1956 struct ib_sa_guidinfo_rec *rec,
1957 ib_sa_comp_mask comp_mask, u8 method,
1958 int timeout_ms, gfp_t gfp_mask,
1959 void (*callback)(int status,
1960 struct ib_sa_guidinfo_rec *resp,
1961 void *context),
1962 void *context,
1963 struct ib_sa_query **sa_query)
1964 {
1965 struct ib_sa_guidinfo_query *query;
1966 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1967 struct ib_sa_port *port;
1968 struct ib_mad_agent *agent;
1969 struct ib_sa_mad *mad;
1970 int ret;
1971
1972 if (!sa_dev)
1973 return -ENODEV;
1974
1975 if (method != IB_MGMT_METHOD_GET &&
1976 method != IB_MGMT_METHOD_SET &&
1977 method != IB_SA_METHOD_DELETE) {
1978 return -EINVAL;
1979 }
1980
1981 port = &sa_dev->port[port_num - sa_dev->start_port];
1982 agent = port->agent;
1983
1984 query = kzalloc(sizeof(*query), gfp_mask);
1985 if (!query)
1986 return -ENOMEM;
1987
1988 query->sa_query.port = port;
1989 ret = alloc_mad(&query->sa_query, gfp_mask);
1990 if (ret)
1991 goto err1;
1992
1993 ib_sa_client_get(client);
1994 query->sa_query.client = client;
1995 query->callback = callback;
1996 query->context = context;
1997
1998 mad = query->sa_query.mad_buf->mad;
1999 init_mad(&query->sa_query, agent);
2000
2001 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
2002 query->sa_query.release = ib_sa_guidinfo_rec_release;
2003
2004 mad->mad_hdr.method = method;
2005 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
2006 mad->sa_hdr.comp_mask = comp_mask;
2007
2008 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
2009 mad->data);
2010
2011 *sa_query = &query->sa_query;
2012
2013 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
2014 if (ret < 0)
2015 goto err2;
2016
2017 return ret;
2018
2019 err2:
2020 *sa_query = NULL;
2021 ib_sa_client_put(query->sa_query.client);
2022 free_mad(&query->sa_query);
2023
2024 err1:
2025 kfree(query);
2026 return ret;
2027 }
2028 EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
2029
2030 bool ib_sa_sendonly_fullmem_support(struct ib_sa_client *client,
2031 struct ib_device *device,
2032 u8 port_num)
2033 {
2034 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
2035 struct ib_sa_port *port;
2036 bool ret = false;
2037 unsigned long flags;
2038
2039 if (!sa_dev)
2040 return ret;
2041
2042 port = &sa_dev->port[port_num - sa_dev->start_port];
2043
2044 spin_lock_irqsave(&port->classport_lock, flags);
2045 if ((port->classport_info.valid) &&
2046 (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_IB))
2047 ret = ib_get_cpi_capmask2(&port->classport_info.data.ib)
2048 & IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT;
2049 spin_unlock_irqrestore(&port->classport_lock, flags);
2050 return ret;
2051 }
2052 EXPORT_SYMBOL(ib_sa_sendonly_fullmem_support);
2053
2054 struct ib_classport_info_context {
2055 struct completion done;
2056 struct ib_sa_query *sa_query;
2057 };
2058
2059 static void ib_classportinfo_cb(void *context)
2060 {
2061 struct ib_classport_info_context *cb_ctx = context;
2062
2063 complete(&cb_ctx->done);
2064 }
2065
2066 static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
2067 int status,
2068 struct ib_sa_mad *mad)
2069 {
2070 unsigned long flags;
2071 struct ib_sa_classport_info_query *query =
2072 container_of(sa_query, struct ib_sa_classport_info_query, sa_query);
2073 struct ib_sa_classport_cache *info = &sa_query->port->classport_info;
2074
2075 if (mad) {
2076 if (sa_query->flags & IB_SA_QUERY_OPA) {
2077 struct opa_class_port_info rec;
2078
2079 ib_unpack(opa_classport_info_rec_table,
2080 ARRAY_SIZE(opa_classport_info_rec_table),
2081 mad->data, &rec);
2082
2083 spin_lock_irqsave(&sa_query->port->classport_lock,
2084 flags);
2085 if (!status && !info->valid) {
2086 memcpy(&info->data.opa, &rec,
2087 sizeof(info->data.opa));
2088
2089 info->valid = true;
2090 info->data.type = RDMA_CLASS_PORT_INFO_OPA;
2091 }
2092 spin_unlock_irqrestore(&sa_query->port->classport_lock,
2093 flags);
2094
2095 } else {
2096 struct ib_class_port_info rec;
2097
2098 ib_unpack(ib_classport_info_rec_table,
2099 ARRAY_SIZE(ib_classport_info_rec_table),
2100 mad->data, &rec);
2101
2102 spin_lock_irqsave(&sa_query->port->classport_lock,
2103 flags);
2104 if (!status && !info->valid) {
2105 memcpy(&info->data.ib, &rec,
2106 sizeof(info->data.ib));
2107
2108 info->valid = true;
2109 info->data.type = RDMA_CLASS_PORT_INFO_IB;
2110 }
2111 spin_unlock_irqrestore(&sa_query->port->classport_lock,
2112 flags);
2113 }
2114 }
2115 query->callback(query->context);
2116 }
2117
2118 static void ib_sa_classport_info_rec_release(struct ib_sa_query *sa_query)
2119 {
2120 kfree(container_of(sa_query, struct ib_sa_classport_info_query,
2121 sa_query));
2122 }
2123
2124 static int ib_sa_classport_info_rec_query(struct ib_sa_port *port,
2125 int timeout_ms,
2126 void (*callback)(void *context),
2127 void *context,
2128 struct ib_sa_query **sa_query)
2129 {
2130 struct ib_mad_agent *agent;
2131 struct ib_sa_classport_info_query *query;
2132 struct ib_sa_mad *mad;
2133 gfp_t gfp_mask = GFP_KERNEL;
2134 int ret;
2135
2136 agent = port->agent;
2137
2138 query = kzalloc(sizeof(*query), gfp_mask);
2139 if (!query)
2140 return -ENOMEM;
2141
2142 query->sa_query.port = port;
2143 query->sa_query.flags |= rdma_cap_opa_ah(port->agent->device,
2144 port->port_num) ?
2145 IB_SA_QUERY_OPA : 0;
2146 ret = alloc_mad(&query->sa_query, gfp_mask);
2147 if (ret)
2148 goto err_free;
2149
2150 query->callback = callback;
2151 query->context = context;
2152
2153 mad = query->sa_query.mad_buf->mad;
2154 init_mad(&query->sa_query, agent);
2155
2156 query->sa_query.callback = ib_sa_classport_info_rec_callback;
2157 query->sa_query.release = ib_sa_classport_info_rec_release;
2158 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
2159 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO);
2160 mad->sa_hdr.comp_mask = 0;
2161 *sa_query = &query->sa_query;
2162
2163 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
2164 if (ret < 0)
2165 goto err_free_mad;
2166
2167 return ret;
2168
2169 err_free_mad:
2170 *sa_query = NULL;
2171 free_mad(&query->sa_query);
2172
2173 err_free:
2174 kfree(query);
2175 return ret;
2176 }
2177
2178 static void update_ib_cpi(struct work_struct *work)
2179 {
2180 struct ib_sa_port *port =
2181 container_of(work, struct ib_sa_port, ib_cpi_work.work);
2182 struct ib_classport_info_context *cb_context;
2183 unsigned long flags;
2184 int ret;
2185
2186 /* If the classport info is valid, nothing
2187 * to do here.
2188 */
2189 spin_lock_irqsave(&port->classport_lock, flags);
2190 if (port->classport_info.valid) {
2191 spin_unlock_irqrestore(&port->classport_lock, flags);
2192 return;
2193 }
2194 spin_unlock_irqrestore(&port->classport_lock, flags);
2195
2196 cb_context = kmalloc(sizeof(*cb_context), GFP_KERNEL);
2197 if (!cb_context)
2198 goto err_nomem;
2199
2200 init_completion(&cb_context->done);
2201
2202 ret = ib_sa_classport_info_rec_query(port, 3000,
2203 ib_classportinfo_cb, cb_context,
2204 &cb_context->sa_query);
2205 if (ret < 0)
2206 goto free_cb_err;
2207 wait_for_completion(&cb_context->done);
2208 free_cb_err:
2209 kfree(cb_context);
2210 spin_lock_irqsave(&port->classport_lock, flags);
2211
2212 /* If the classport info is still not valid, the query should have
2213 * failed for some reason. Retry issuing the query
2214 */
2215 if (!port->classport_info.valid) {
2216 port->classport_info.retry_cnt++;
2217 if (port->classport_info.retry_cnt <=
2218 IB_SA_CPI_MAX_RETRY_CNT) {
2219 unsigned long delay =
2220 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2221
2222 queue_delayed_work(ib_wq, &port->ib_cpi_work, delay);
2223 }
2224 }
2225 spin_unlock_irqrestore(&port->classport_lock, flags);
2226
2227 err_nomem:
2228 return;
2229 }
2230
2231 static void send_handler(struct ib_mad_agent *agent,
2232 struct ib_mad_send_wc *mad_send_wc)
2233 {
2234 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
2235 unsigned long flags;
2236
2237 if (query->callback)
2238 switch (mad_send_wc->status) {
2239 case IB_WC_SUCCESS:
2240 /* No callback -- already got recv */
2241 break;
2242 case IB_WC_RESP_TIMEOUT_ERR:
2243 query->callback(query, -ETIMEDOUT, NULL);
2244 break;
2245 case IB_WC_WR_FLUSH_ERR:
2246 query->callback(query, -EINTR, NULL);
2247 break;
2248 default:
2249 query->callback(query, -EIO, NULL);
2250 break;
2251 }
2252
2253 spin_lock_irqsave(&idr_lock, flags);
2254 idr_remove(&query_idr, query->id);
2255 spin_unlock_irqrestore(&idr_lock, flags);
2256
2257 free_mad(query);
2258 if (query->client)
2259 ib_sa_client_put(query->client);
2260 query->release(query);
2261 }
2262
2263 static void recv_handler(struct ib_mad_agent *mad_agent,
2264 struct ib_mad_send_buf *send_buf,
2265 struct ib_mad_recv_wc *mad_recv_wc)
2266 {
2267 struct ib_sa_query *query;
2268
2269 if (!send_buf)
2270 return;
2271
2272 query = send_buf->context[0];
2273 if (query->callback) {
2274 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
2275 query->callback(query,
2276 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
2277 -EINVAL : 0,
2278 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
2279 else
2280 query->callback(query, -EIO, NULL);
2281 }
2282
2283 ib_free_recv_mad(mad_recv_wc);
2284 }
2285
2286 static void update_sm_ah(struct work_struct *work)
2287 {
2288 struct ib_sa_port *port =
2289 container_of(work, struct ib_sa_port, update_task);
2290 struct ib_sa_sm_ah *new_ah;
2291 struct ib_port_attr port_attr;
2292 struct rdma_ah_attr ah_attr;
2293
2294 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
2295 pr_warn("Couldn't query port\n");
2296 return;
2297 }
2298
2299 new_ah = kmalloc(sizeof(*new_ah), GFP_KERNEL);
2300 if (!new_ah)
2301 return;
2302
2303 kref_init(&new_ah->ref);
2304 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
2305
2306 new_ah->pkey_index = 0;
2307 if (ib_find_pkey(port->agent->device, port->port_num,
2308 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
2309 pr_err("Couldn't find index for default PKey\n");
2310
2311 memset(&ah_attr, 0, sizeof(ah_attr));
2312 ah_attr.type = rdma_ah_find_type(port->agent->device,
2313 port->port_num);
2314 rdma_ah_set_dlid(&ah_attr, port_attr.sm_lid);
2315 rdma_ah_set_sl(&ah_attr, port_attr.sm_sl);
2316 rdma_ah_set_port_num(&ah_attr, port->port_num);
2317 if (port_attr.grh_required) {
2318 if (ah_attr.type == RDMA_AH_ATTR_TYPE_OPA) {
2319 rdma_ah_set_make_grd(&ah_attr, true);
2320 } else {
2321 rdma_ah_set_ah_flags(&ah_attr, IB_AH_GRH);
2322 rdma_ah_set_subnet_prefix(&ah_attr,
2323 cpu_to_be64(port_attr.subnet_prefix));
2324 rdma_ah_set_interface_id(&ah_attr,
2325 cpu_to_be64(IB_SA_WELL_KNOWN_GUID));
2326 }
2327 }
2328
2329 new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr);
2330 if (IS_ERR(new_ah->ah)) {
2331 pr_warn("Couldn't create new SM AH\n");
2332 kfree(new_ah);
2333 return;
2334 }
2335
2336 spin_lock_irq(&port->ah_lock);
2337 if (port->sm_ah)
2338 kref_put(&port->sm_ah->ref, free_sm_ah);
2339 port->sm_ah = new_ah;
2340 spin_unlock_irq(&port->ah_lock);
2341 }
2342
2343 static void ib_sa_event(struct ib_event_handler *handler,
2344 struct ib_event *event)
2345 {
2346 if (event->event == IB_EVENT_PORT_ERR ||
2347 event->event == IB_EVENT_PORT_ACTIVE ||
2348 event->event == IB_EVENT_LID_CHANGE ||
2349 event->event == IB_EVENT_PKEY_CHANGE ||
2350 event->event == IB_EVENT_SM_CHANGE ||
2351 event->event == IB_EVENT_CLIENT_REREGISTER) {
2352 unsigned long flags;
2353 struct ib_sa_device *sa_dev =
2354 container_of(handler, typeof(*sa_dev), event_handler);
2355 u8 port_num = event->element.port_num - sa_dev->start_port;
2356 struct ib_sa_port *port = &sa_dev->port[port_num];
2357
2358 if (!rdma_cap_ib_sa(handler->device, port->port_num))
2359 return;
2360
2361 spin_lock_irqsave(&port->ah_lock, flags);
2362 if (port->sm_ah)
2363 kref_put(&port->sm_ah->ref, free_sm_ah);
2364 port->sm_ah = NULL;
2365 spin_unlock_irqrestore(&port->ah_lock, flags);
2366
2367 if (event->event == IB_EVENT_SM_CHANGE ||
2368 event->event == IB_EVENT_CLIENT_REREGISTER ||
2369 event->event == IB_EVENT_LID_CHANGE ||
2370 event->event == IB_EVENT_PORT_ACTIVE) {
2371 unsigned long delay =
2372 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2373
2374 spin_lock_irqsave(&port->classport_lock, flags);
2375 port->classport_info.valid = false;
2376 port->classport_info.retry_cnt = 0;
2377 spin_unlock_irqrestore(&port->classport_lock, flags);
2378 queue_delayed_work(ib_wq,
2379 &port->ib_cpi_work, delay);
2380 }
2381 queue_work(ib_wq, &sa_dev->port[port_num].update_task);
2382 }
2383 }
2384
2385 static void ib_sa_add_one(struct ib_device *device)
2386 {
2387 struct ib_sa_device *sa_dev;
2388 int s, e, i;
2389 int count = 0;
2390
2391 s = rdma_start_port(device);
2392 e = rdma_end_port(device);
2393
2394 sa_dev = kzalloc(sizeof *sa_dev +
2395 (e - s + 1) * sizeof (struct ib_sa_port),
2396 GFP_KERNEL);
2397 if (!sa_dev)
2398 return;
2399
2400 sa_dev->start_port = s;
2401 sa_dev->end_port = e;
2402
2403 for (i = 0; i <= e - s; ++i) {
2404 spin_lock_init(&sa_dev->port[i].ah_lock);
2405 if (!rdma_cap_ib_sa(device, i + 1))
2406 continue;
2407
2408 sa_dev->port[i].sm_ah = NULL;
2409 sa_dev->port[i].port_num = i + s;
2410
2411 spin_lock_init(&sa_dev->port[i].classport_lock);
2412 sa_dev->port[i].classport_info.valid = false;
2413
2414 sa_dev->port[i].agent =
2415 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
2416 NULL, 0, send_handler,
2417 recv_handler, sa_dev, 0);
2418 if (IS_ERR(sa_dev->port[i].agent))
2419 goto err;
2420
2421 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
2422 INIT_DELAYED_WORK(&sa_dev->port[i].ib_cpi_work,
2423 update_ib_cpi);
2424
2425 count++;
2426 }
2427
2428 if (!count)
2429 goto free;
2430
2431 ib_set_client_data(device, &sa_client, sa_dev);
2432
2433 /*
2434 * We register our event handler after everything is set up,
2435 * and then update our cached info after the event handler is
2436 * registered to avoid any problems if a port changes state
2437 * during our initialization.
2438 */
2439
2440 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
2441 ib_register_event_handler(&sa_dev->event_handler);
2442
2443 for (i = 0; i <= e - s; ++i) {
2444 if (rdma_cap_ib_sa(device, i + 1))
2445 update_sm_ah(&sa_dev->port[i].update_task);
2446 }
2447
2448 return;
2449
2450 err:
2451 while (--i >= 0) {
2452 if (rdma_cap_ib_sa(device, i + 1))
2453 ib_unregister_mad_agent(sa_dev->port[i].agent);
2454 }
2455 free:
2456 kfree(sa_dev);
2457 return;
2458 }
2459
2460 static void ib_sa_remove_one(struct ib_device *device, void *client_data)
2461 {
2462 struct ib_sa_device *sa_dev = client_data;
2463 int i;
2464
2465 if (!sa_dev)
2466 return;
2467
2468 ib_unregister_event_handler(&sa_dev->event_handler);
2469 flush_workqueue(ib_wq);
2470
2471 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
2472 if (rdma_cap_ib_sa(device, i + 1)) {
2473 cancel_delayed_work_sync(&sa_dev->port[i].ib_cpi_work);
2474 ib_unregister_mad_agent(sa_dev->port[i].agent);
2475 if (sa_dev->port[i].sm_ah)
2476 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
2477 }
2478
2479 }
2480
2481 kfree(sa_dev);
2482 }
2483
2484 int ib_sa_init(void)
2485 {
2486 int ret;
2487
2488 get_random_bytes(&tid, sizeof tid);
2489
2490 atomic_set(&ib_nl_sa_request_seq, 0);
2491
2492 ret = ib_register_client(&sa_client);
2493 if (ret) {
2494 pr_err("Couldn't register ib_sa client\n");
2495 goto err1;
2496 }
2497
2498 ret = mcast_init();
2499 if (ret) {
2500 pr_err("Couldn't initialize multicast handling\n");
2501 goto err2;
2502 }
2503
2504 ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM);
2505 if (!ib_nl_wq) {
2506 ret = -ENOMEM;
2507 goto err3;
2508 }
2509
2510 INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
2511
2512 return 0;
2513
2514 err3:
2515 mcast_cleanup();
2516 err2:
2517 ib_unregister_client(&sa_client);
2518 err1:
2519 return ret;
2520 }
2521
2522 void ib_sa_cleanup(void)
2523 {
2524 cancel_delayed_work(&ib_nl_timed_work);
2525 flush_workqueue(ib_nl_wq);
2526 destroy_workqueue(ib_nl_wq);
2527 mcast_cleanup();
2528 ib_unregister_client(&sa_client);
2529 idr_destroy(&query_idr);
2530 }
Linux with added FPC-III support