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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / infiniband / core / sa_query.c
blob89a831fa1885b8eecf2ed5b1c2f46bda485c6ca5
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[];
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 int 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_field(struct sa_path_rec, 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_field(struct sa_path_rec, 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_field(struct ib_sa_mcmember_rec, 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_field(struct ib_sa_service_rec, 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_field(struct ib_class_port_info, 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_field(struct opa_class_port_info, 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_field(struct ib_sa_guidinfo_rec, 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_make_request(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 unsigned long flags;
840 unsigned long delay;
841 gfp_t gfp_flag;
842 int ret;
843
844 INIT_LIST_HEAD(&query->list);
845 query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq);
846
847 mad = query->mad_buf->mad;
848 len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask);
849 if (len <= 0)
850 return -EMSGSIZE;
851
852 skb = nlmsg_new(len, gfp_mask);
853 if (!skb)
854 return -ENOMEM;
855
856 /* Put nlmsg header only for now */
857 data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS,
858 RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST);
859 if (!data) {
860 nlmsg_free(skb);
861 return -EMSGSIZE;
862 }
863
864 /* Add attributes */
865 ib_nl_set_path_rec_attrs(skb, query);
866
867 /* Repair the nlmsg header length */
868 nlmsg_end(skb, nlh);
869
870 gfp_flag = ((gfp_mask & GFP_ATOMIC) == GFP_ATOMIC) ? GFP_ATOMIC :
871 GFP_NOWAIT;
872
873 spin_lock_irqsave(&ib_nl_request_lock, flags);
874 ret = rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_LS, gfp_flag);
875
876 if (ret)
877 goto out;
878
879 /* Put the request on the list.*/
880 delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
881 query->timeout = delay + jiffies;
882 list_add_tail(&query->list, &ib_nl_request_list);
883 /* Start the timeout if this is the only request */
884 if (ib_nl_request_list.next == &query->list)
885 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
886
887 out:
888 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
889
890 return ret;
891 }
892
893 static int ib_nl_cancel_request(struct ib_sa_query *query)
894 {
895 unsigned long flags;
896 struct ib_sa_query *wait_query;
897 int found = 0;
898
899 spin_lock_irqsave(&ib_nl_request_lock, flags);
900 list_for_each_entry(wait_query, &ib_nl_request_list, list) {
901 /* Let the timeout to take care of the callback */
902 if (query == wait_query) {
903 query->flags |= IB_SA_CANCEL;
904 query->timeout = jiffies;
905 list_move(&query->list, &ib_nl_request_list);
906 found = 1;
907 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1);
908 break;
909 }
910 }
911 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
912
913 return found;
914 }
915
916 static void send_handler(struct ib_mad_agent *agent,
917 struct ib_mad_send_wc *mad_send_wc);
918
919 static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
920 const struct nlmsghdr *nlh)
921 {
922 struct ib_mad_send_wc mad_send_wc;
923 struct ib_sa_mad *mad = NULL;
924 const struct nlattr *head, *curr;
925 struct ib_path_rec_data *rec;
926 int len, rem;
927 u32 mask = 0;
928 int status = -EIO;
929
930 if (query->callback) {
931 head = (const struct nlattr *) nlmsg_data(nlh);
932 len = nlmsg_len(nlh);
933 switch (query->path_use) {
934 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL:
935 mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND;
936 break;
937
938 case LS_RESOLVE_PATH_USE_ALL:
939 case LS_RESOLVE_PATH_USE_GMP:
940 default:
941 mask = IB_PATH_PRIMARY | IB_PATH_GMP |
942 IB_PATH_BIDIRECTIONAL;
943 break;
944 }
945 nla_for_each_attr(curr, head, len, rem) {
946 if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
947 rec = nla_data(curr);
948 /*
949 * Get the first one. In the future, we may
950 * need to get up to 6 pathrecords.
951 */
952 if ((rec->flags & mask) == mask) {
953 mad = query->mad_buf->mad;
954 mad->mad_hdr.method |=
955 IB_MGMT_METHOD_RESP;
956 memcpy(mad->data, rec->path_rec,
957 sizeof(rec->path_rec));
958 status = 0;
959 break;
960 }
961 }
962 }
963 query->callback(query, status, mad);
964 }
965
966 mad_send_wc.send_buf = query->mad_buf;
967 mad_send_wc.status = IB_WC_SUCCESS;
968 send_handler(query->mad_buf->mad_agent, &mad_send_wc);
969 }
970
971 static void ib_nl_request_timeout(struct work_struct *work)
972 {
973 unsigned long flags;
974 struct ib_sa_query *query;
975 unsigned long delay;
976 struct ib_mad_send_wc mad_send_wc;
977 int ret;
978
979 spin_lock_irqsave(&ib_nl_request_lock, flags);
980 while (!list_empty(&ib_nl_request_list)) {
981 query = list_entry(ib_nl_request_list.next,
982 struct ib_sa_query, list);
983
984 if (time_after(query->timeout, jiffies)) {
985 delay = query->timeout - jiffies;
986 if ((long)delay <= 0)
987 delay = 1;
988 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
989 break;
990 }
991
992 list_del(&query->list);
993 ib_sa_disable_local_svc(query);
994 /* Hold the lock to protect against query cancellation */
995 if (ib_sa_query_cancelled(query))
996 ret = -1;
997 else
998 ret = ib_post_send_mad(query->mad_buf, NULL);
999 if (ret) {
1000 mad_send_wc.send_buf = query->mad_buf;
1001 mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
1002 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1003 send_handler(query->port->agent, &mad_send_wc);
1004 spin_lock_irqsave(&ib_nl_request_lock, flags);
1005 }
1006 }
1007 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1008 }
1009
1010 int ib_nl_handle_set_timeout(struct sk_buff *skb,
1011 struct nlmsghdr *nlh,
1012 struct netlink_ext_ack *extack)
1013 {
1014 int timeout, delta, abs_delta;
1015 const struct nlattr *attr;
1016 unsigned long flags;
1017 struct ib_sa_query *query;
1018 long delay = 0;
1019 struct nlattr *tb[LS_NLA_TYPE_MAX];
1020 int ret;
1021
1022 if (!(nlh->nlmsg_flags & NLM_F_REQUEST) ||
1023 !(NETLINK_CB(skb).sk))
1024 return -EPERM;
1025
1026 ret = nla_parse_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1027 nlmsg_len(nlh), ib_nl_policy, NULL);
1028 attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT];
1029 if (ret || !attr)
1030 goto settimeout_out;
1031
1032 timeout = *(int *) nla_data(attr);
1033 if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN)
1034 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN;
1035 if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX)
1036 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX;
1037
1038 delta = timeout - sa_local_svc_timeout_ms;
1039 if (delta < 0)
1040 abs_delta = -delta;
1041 else
1042 abs_delta = delta;
1043
1044 if (delta != 0) {
1045 spin_lock_irqsave(&ib_nl_request_lock, flags);
1046 sa_local_svc_timeout_ms = timeout;
1047 list_for_each_entry(query, &ib_nl_request_list, list) {
1048 if (delta < 0 && abs_delta > query->timeout)
1049 query->timeout = 0;
1050 else
1051 query->timeout += delta;
1052
1053 /* Get the new delay from the first entry */
1054 if (!delay) {
1055 delay = query->timeout - jiffies;
1056 if (delay <= 0)
1057 delay = 1;
1058 }
1059 }
1060 if (delay)
1061 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work,
1062 (unsigned long)delay);
1063 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1064 }
1065
1066 settimeout_out:
1067 return 0;
1068 }
1069
1070 static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh)
1071 {
1072 struct nlattr *tb[LS_NLA_TYPE_MAX];
1073 int ret;
1074
1075 if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR)
1076 return 0;
1077
1078 ret = nla_parse_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1079 nlmsg_len(nlh), ib_nl_policy, NULL);
1080 if (ret)
1081 return 0;
1082
1083 return 1;
1084 }
1085
1086 int ib_nl_handle_resolve_resp(struct sk_buff *skb,
1087 struct nlmsghdr *nlh,
1088 struct netlink_ext_ack *extack)
1089 {
1090 unsigned long flags;
1091 struct ib_sa_query *query;
1092 struct ib_mad_send_buf *send_buf;
1093 struct ib_mad_send_wc mad_send_wc;
1094 int found = 0;
1095 int ret;
1096
1097 if ((nlh->nlmsg_flags & NLM_F_REQUEST) ||
1098 !(NETLINK_CB(skb).sk))
1099 return -EPERM;
1100
1101 spin_lock_irqsave(&ib_nl_request_lock, flags);
1102 list_for_each_entry(query, &ib_nl_request_list, list) {
1103 /*
1104 * If the query is cancelled, let the timeout routine
1105 * take care of it.
1106 */
1107 if (nlh->nlmsg_seq == query->seq) {
1108 found = !ib_sa_query_cancelled(query);
1109 if (found)
1110 list_del(&query->list);
1111 break;
1112 }
1113 }
1114
1115 if (!found) {
1116 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1117 goto resp_out;
1118 }
1119
1120 send_buf = query->mad_buf;
1121
1122 if (!ib_nl_is_good_resolve_resp(nlh)) {
1123 /* if the result is a failure, send out the packet via IB */
1124 ib_sa_disable_local_svc(query);
1125 ret = ib_post_send_mad(query->mad_buf, NULL);
1126 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1127 if (ret) {
1128 mad_send_wc.send_buf = send_buf;
1129 mad_send_wc.status = IB_WC_GENERAL_ERR;
1130 send_handler(query->port->agent, &mad_send_wc);
1131 }
1132 } else {
1133 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1134 ib_nl_process_good_resolve_rsp(query, nlh);
1135 }
1136
1137 resp_out:
1138 return 0;
1139 }
1140
1141 static void free_sm_ah(struct kref *kref)
1142 {
1143 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
1144
1145 rdma_destroy_ah(sm_ah->ah, 0);
1146 kfree(sm_ah);
1147 }
1148
1149 void ib_sa_register_client(struct ib_sa_client *client)
1150 {
1151 atomic_set(&client->users, 1);
1152 init_completion(&client->comp);
1153 }
1154 EXPORT_SYMBOL(ib_sa_register_client);
1155
1156 void ib_sa_unregister_client(struct ib_sa_client *client)
1157 {
1158 ib_sa_client_put(client);
1159 wait_for_completion(&client->comp);
1160 }
1161 EXPORT_SYMBOL(ib_sa_unregister_client);
1162
1163 /**
1164 * ib_sa_cancel_query - try to cancel an SA query
1165 * @id:ID of query to cancel
1166 * @query:query pointer to cancel
1167 *
1168 * Try to cancel an SA query. If the id and query don't match up or
1169 * the query has already completed, nothing is done. Otherwise the
1170 * query is canceled and will complete with a status of -EINTR.
1171 */
1172 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
1173 {
1174 unsigned long flags;
1175 struct ib_mad_agent *agent;
1176 struct ib_mad_send_buf *mad_buf;
1177
1178 xa_lock_irqsave(&queries, flags);
1179 if (xa_load(&queries, id) != query) {
1180 xa_unlock_irqrestore(&queries, flags);
1181 return;
1182 }
1183 agent = query->port->agent;
1184 mad_buf = query->mad_buf;
1185 xa_unlock_irqrestore(&queries, flags);
1186
1187 /*
1188 * If the query is still on the netlink request list, schedule
1189 * it to be cancelled by the timeout routine. Otherwise, it has been
1190 * sent to the MAD layer and has to be cancelled from there.
1191 */
1192 if (!ib_nl_cancel_request(query))
1193 ib_cancel_mad(agent, mad_buf);
1194 }
1195 EXPORT_SYMBOL(ib_sa_cancel_query);
1196
1197 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
1198 {
1199 struct ib_sa_device *sa_dev;
1200 struct ib_sa_port *port;
1201 unsigned long flags;
1202 u8 src_path_mask;
1203
1204 sa_dev = ib_get_client_data(device, &sa_client);
1205 if (!sa_dev)
1206 return 0x7f;
1207
1208 port = &sa_dev->port[port_num - sa_dev->start_port];
1209 spin_lock_irqsave(&port->ah_lock, flags);
1210 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
1211 spin_unlock_irqrestore(&port->ah_lock, flags);
1212
1213 return src_path_mask;
1214 }
1215
1216 static int init_ah_attr_grh_fields(struct ib_device *device, u8 port_num,
1217 struct sa_path_rec *rec,
1218 struct rdma_ah_attr *ah_attr,
1219 const struct ib_gid_attr *gid_attr)
1220 {
1221 enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec);
1222
1223 if (!gid_attr) {
1224 gid_attr = rdma_find_gid_by_port(device, &rec->sgid, type,
1225 port_num, NULL);
1226 if (IS_ERR(gid_attr))
1227 return PTR_ERR(gid_attr);
1228 } else
1229 rdma_hold_gid_attr(gid_attr);
1230
1231 rdma_move_grh_sgid_attr(ah_attr, &rec->dgid,
1232 be32_to_cpu(rec->flow_label),
1233 rec->hop_limit, rec->traffic_class,
1234 gid_attr);
1235 return 0;
1236 }
1237
1238 /**
1239 * ib_init_ah_attr_from_path - Initialize address handle attributes based on
1240 * an SA path record.
1241 * @device: Device associated ah attributes initialization.
1242 * @port_num: Port on the specified device.
1243 * @rec: path record entry to use for ah attributes initialization.
1244 * @ah_attr: address handle attributes to initialization from path record.
1245 * @gid_attr: SGID attribute to consider during initialization.
1246 *
1247 * When ib_init_ah_attr_from_path() returns success,
1248 * (a) for IB link layer it optionally contains a reference to SGID attribute
1249 * when GRH is present for IB link layer.
1250 * (b) for RoCE link layer it contains a reference to SGID attribute.
1251 * User must invoke rdma_destroy_ah_attr() to release reference to SGID
1252 * attributes which are initialized using ib_init_ah_attr_from_path().
1253 */
1254 int ib_init_ah_attr_from_path(struct ib_device *device, u8 port_num,
1255 struct sa_path_rec *rec,
1256 struct rdma_ah_attr *ah_attr,
1257 const struct ib_gid_attr *gid_attr)
1258 {
1259 int ret = 0;
1260
1261 memset(ah_attr, 0, sizeof(*ah_attr));
1262 ah_attr->type = rdma_ah_find_type(device, port_num);
1263 rdma_ah_set_sl(ah_attr, rec->sl);
1264 rdma_ah_set_port_num(ah_attr, port_num);
1265 rdma_ah_set_static_rate(ah_attr, rec->rate);
1266
1267 if (sa_path_is_roce(rec)) {
1268 ret = roce_resolve_route_from_path(rec, gid_attr);
1269 if (ret)
1270 return ret;
1271
1272 memcpy(ah_attr->roce.dmac, sa_path_get_dmac(rec), ETH_ALEN);
1273 } else {
1274 rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec)));
1275 if (sa_path_is_opa(rec) &&
1276 rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE))
1277 rdma_ah_set_make_grd(ah_attr, true);
1278
1279 rdma_ah_set_path_bits(ah_attr,
1280 be32_to_cpu(sa_path_get_slid(rec)) &
1281 get_src_path_mask(device, port_num));
1282 }
1283
1284 if (rec->hop_limit > 0 || sa_path_is_roce(rec))
1285 ret = init_ah_attr_grh_fields(device, port_num,
1286 rec, ah_attr, gid_attr);
1287 return ret;
1288 }
1289 EXPORT_SYMBOL(ib_init_ah_attr_from_path);
1290
1291 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1292 {
1293 struct rdma_ah_attr ah_attr;
1294 unsigned long flags;
1295
1296 spin_lock_irqsave(&query->port->ah_lock, flags);
1297 if (!query->port->sm_ah) {
1298 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1299 return -EAGAIN;
1300 }
1301 kref_get(&query->port->sm_ah->ref);
1302 query->sm_ah = query->port->sm_ah;
1303 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1304
1305 /*
1306 * Always check if sm_ah has valid dlid assigned,
1307 * before querying for class port info
1308 */
1309 if ((rdma_query_ah(query->sm_ah->ah, &ah_attr) < 0) ||
1310 !rdma_is_valid_unicast_lid(&ah_attr)) {
1311 kref_put(&query->sm_ah->ref, free_sm_ah);
1312 return -EAGAIN;
1313 }
1314 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1315 query->sm_ah->pkey_index,
1316 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
1317 gfp_mask,
1318 ((query->flags & IB_SA_QUERY_OPA) ?
1319 OPA_MGMT_BASE_VERSION :
1320 IB_MGMT_BASE_VERSION));
1321 if (IS_ERR(query->mad_buf)) {
1322 kref_put(&query->sm_ah->ref, free_sm_ah);
1323 return -ENOMEM;
1324 }
1325
1326 query->mad_buf->ah = query->sm_ah->ah;
1327
1328 return 0;
1329 }
1330
1331 static void free_mad(struct ib_sa_query *query)
1332 {
1333 ib_free_send_mad(query->mad_buf);
1334 kref_put(&query->sm_ah->ref, free_sm_ah);
1335 }
1336
1337 static void init_mad(struct ib_sa_query *query, struct ib_mad_agent *agent)
1338 {
1339 struct ib_sa_mad *mad = query->mad_buf->mad;
1340 unsigned long flags;
1341
1342 memset(mad, 0, sizeof *mad);
1343
1344 if (query->flags & IB_SA_QUERY_OPA) {
1345 mad->mad_hdr.base_version = OPA_MGMT_BASE_VERSION;
1346 mad->mad_hdr.class_version = OPA_SA_CLASS_VERSION;
1347 } else {
1348 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
1349 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1350 }
1351 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
1352 spin_lock_irqsave(&tid_lock, flags);
1353 mad->mad_hdr.tid =
1354 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1355 spin_unlock_irqrestore(&tid_lock, flags);
1356 }
1357
1358 static int send_mad(struct ib_sa_query *query, unsigned long timeout_ms,
1359 gfp_t gfp_mask)
1360 {
1361 unsigned long flags;
1362 int ret, id;
1363
1364 xa_lock_irqsave(&queries, flags);
1365 ret = __xa_alloc(&queries, &id, query, xa_limit_32b, gfp_mask);
1366 xa_unlock_irqrestore(&queries, flags);
1367 if (ret < 0)
1368 return ret;
1369
1370 query->mad_buf->timeout_ms = timeout_ms;
1371 query->mad_buf->context[0] = query;
1372 query->id = id;
1373
1374 if ((query->flags & IB_SA_ENABLE_LOCAL_SERVICE) &&
1375 (!(query->flags & IB_SA_QUERY_OPA))) {
1376 if (rdma_nl_chk_listeners(RDMA_NL_GROUP_LS)) {
1377 if (!ib_nl_make_request(query, gfp_mask))
1378 return id;
1379 }
1380 ib_sa_disable_local_svc(query);
1381 }
1382
1383 ret = ib_post_send_mad(query->mad_buf, NULL);
1384 if (ret) {
1385 xa_lock_irqsave(&queries, flags);
1386 __xa_erase(&queries, id);
1387 xa_unlock_irqrestore(&queries, flags);
1388 }
1389
1390 /*
1391 * It's not safe to dereference query any more, because the
1392 * send may already have completed and freed the query in
1393 * another context.
1394 */
1395 return ret ? ret : id;
1396 }
1397
1398 void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec)
1399 {
1400 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1401 }
1402 EXPORT_SYMBOL(ib_sa_unpack_path);
1403
1404 void ib_sa_pack_path(struct sa_path_rec *rec, void *attribute)
1405 {
1406 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1407 }
1408 EXPORT_SYMBOL(ib_sa_pack_path);
1409
1410 static bool ib_sa_opa_pathrecord_support(struct ib_sa_client *client,
1411 struct ib_sa_device *sa_dev,
1412 u8 port_num)
1413 {
1414 struct ib_sa_port *port;
1415 unsigned long flags;
1416 bool ret = false;
1417
1418 port = &sa_dev->port[port_num - sa_dev->start_port];
1419 spin_lock_irqsave(&port->classport_lock, flags);
1420 if (!port->classport_info.valid)
1421 goto ret;
1422
1423 if (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_OPA)
1424 ret = opa_get_cpi_capmask2(&port->classport_info.data.opa) &
1425 OPA_CLASS_PORT_INFO_PR_SUPPORT;
1426 ret:
1427 spin_unlock_irqrestore(&port->classport_lock, flags);
1428 return ret;
1429 }
1430
1431 enum opa_pr_supported {
1432 PR_NOT_SUPPORTED,
1433 PR_OPA_SUPPORTED,
1434 PR_IB_SUPPORTED
1435 };
1436
1437 /**
1438 * opa_pr_query_possible - Check if current PR query can be an OPA query.
1439 *
1440 * Retuns PR_NOT_SUPPORTED if a path record query is not
1441 * possible, PR_OPA_SUPPORTED if an OPA path record query
1442 * is possible and PR_IB_SUPPORTED if an IB path record
1443 * query is possible.
1444 */
1445 static int opa_pr_query_possible(struct ib_sa_client *client,
1446 struct ib_sa_device *sa_dev,
1447 struct ib_device *device, u8 port_num,
1448 struct sa_path_rec *rec)
1449 {
1450 struct ib_port_attr port_attr;
1451
1452 if (ib_query_port(device, port_num, &port_attr))
1453 return PR_NOT_SUPPORTED;
1454
1455 if (ib_sa_opa_pathrecord_support(client, sa_dev, port_num))
1456 return PR_OPA_SUPPORTED;
1457
1458 if (port_attr.lid >= be16_to_cpu(IB_MULTICAST_LID_BASE))
1459 return PR_NOT_SUPPORTED;
1460 else
1461 return PR_IB_SUPPORTED;
1462 }
1463
1464 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1465 int status,
1466 struct ib_sa_mad *mad)
1467 {
1468 struct ib_sa_path_query *query =
1469 container_of(sa_query, struct ib_sa_path_query, sa_query);
1470
1471 if (mad) {
1472 struct sa_path_rec rec;
1473
1474 if (sa_query->flags & IB_SA_QUERY_OPA) {
1475 ib_unpack(opa_path_rec_table,
1476 ARRAY_SIZE(opa_path_rec_table),
1477 mad->data, &rec);
1478 rec.rec_type = SA_PATH_REC_TYPE_OPA;
1479 query->callback(status, &rec, query->context);
1480 } else {
1481 ib_unpack(path_rec_table,
1482 ARRAY_SIZE(path_rec_table),
1483 mad->data, &rec);
1484 rec.rec_type = SA_PATH_REC_TYPE_IB;
1485 sa_path_set_dmac_zero(&rec);
1486
1487 if (query->conv_pr) {
1488 struct sa_path_rec opa;
1489
1490 memset(&opa, 0, sizeof(struct sa_path_rec));
1491 sa_convert_path_ib_to_opa(&opa, &rec);
1492 query->callback(status, &opa, query->context);
1493 } else {
1494 query->callback(status, &rec, query->context);
1495 }
1496 }
1497 } else
1498 query->callback(status, NULL, query->context);
1499 }
1500
1501 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1502 {
1503 struct ib_sa_path_query *query =
1504 container_of(sa_query, struct ib_sa_path_query, sa_query);
1505
1506 kfree(query->conv_pr);
1507 kfree(query);
1508 }
1509
1510 /**
1511 * ib_sa_path_rec_get - Start a Path get query
1512 * @client:SA client
1513 * @device:device to send query on
1514 * @port_num: port number to send query on
1515 * @rec:Path Record to send in query
1516 * @comp_mask:component mask to send in query
1517 * @timeout_ms:time to wait for response
1518 * @gfp_mask:GFP mask to use for internal allocations
1519 * @callback:function called when query completes, times out or is
1520 * canceled
1521 * @context:opaque user context passed to callback
1522 * @sa_query:query context, used to cancel query
1523 *
1524 * Send a Path Record Get query to the SA to look up a path. The
1525 * callback function will be called when the query completes (or
1526 * fails); status is 0 for a successful response, -EINTR if the query
1527 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1528 * occurred sending the query. The resp parameter of the callback is
1529 * only valid if status is 0.
1530 *
1531 * If the return value of ib_sa_path_rec_get() is negative, it is an
1532 * error code. Otherwise it is a query ID that can be used to cancel
1533 * the query.
1534 */
1535 int ib_sa_path_rec_get(struct ib_sa_client *client,
1536 struct ib_device *device, u8 port_num,
1537 struct sa_path_rec *rec,
1538 ib_sa_comp_mask comp_mask,
1539 unsigned long timeout_ms, gfp_t gfp_mask,
1540 void (*callback)(int status,
1541 struct sa_path_rec *resp,
1542 void *context),
1543 void *context,
1544 struct ib_sa_query **sa_query)
1545 {
1546 struct ib_sa_path_query *query;
1547 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1548 struct ib_sa_port *port;
1549 struct ib_mad_agent *agent;
1550 struct ib_sa_mad *mad;
1551 enum opa_pr_supported status;
1552 int ret;
1553
1554 if (!sa_dev)
1555 return -ENODEV;
1556
1557 if ((rec->rec_type != SA_PATH_REC_TYPE_IB) &&
1558 (rec->rec_type != SA_PATH_REC_TYPE_OPA))
1559 return -EINVAL;
1560
1561 port = &sa_dev->port[port_num - sa_dev->start_port];
1562 agent = port->agent;
1563
1564 query = kzalloc(sizeof(*query), gfp_mask);
1565 if (!query)
1566 return -ENOMEM;
1567
1568 query->sa_query.port = port;
1569 if (rec->rec_type == SA_PATH_REC_TYPE_OPA) {
1570 status = opa_pr_query_possible(client, sa_dev, device, port_num,
1571 rec);
1572 if (status == PR_NOT_SUPPORTED) {
1573 ret = -EINVAL;
1574 goto err1;
1575 } else if (status == PR_OPA_SUPPORTED) {
1576 query->sa_query.flags |= IB_SA_QUERY_OPA;
1577 } else {
1578 query->conv_pr =
1579 kmalloc(sizeof(*query->conv_pr), gfp_mask);
1580 if (!query->conv_pr) {
1581 ret = -ENOMEM;
1582 goto err1;
1583 }
1584 }
1585 }
1586
1587 ret = alloc_mad(&query->sa_query, gfp_mask);
1588 if (ret)
1589 goto err2;
1590
1591 ib_sa_client_get(client);
1592 query->sa_query.client = client;
1593 query->callback = callback;
1594 query->context = context;
1595
1596 mad = query->sa_query.mad_buf->mad;
1597 init_mad(&query->sa_query, agent);
1598
1599 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1600 query->sa_query.release = ib_sa_path_rec_release;
1601 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1602 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1603 mad->sa_hdr.comp_mask = comp_mask;
1604
1605 if (query->sa_query.flags & IB_SA_QUERY_OPA) {
1606 ib_pack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table),
1607 rec, mad->data);
1608 } else if (query->conv_pr) {
1609 sa_convert_path_opa_to_ib(query->conv_pr, rec);
1610 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1611 query->conv_pr, mad->data);
1612 } else {
1613 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1614 rec, mad->data);
1615 }
1616
1617 *sa_query = &query->sa_query;
1618
1619 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1620 query->sa_query.mad_buf->context[1] = (query->conv_pr) ?
1621 query->conv_pr : rec;
1622
1623 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1624 if (ret < 0)
1625 goto err3;
1626
1627 return ret;
1628
1629 err3:
1630 *sa_query = NULL;
1631 ib_sa_client_put(query->sa_query.client);
1632 free_mad(&query->sa_query);
1633 err2:
1634 kfree(query->conv_pr);
1635 err1:
1636 kfree(query);
1637 return ret;
1638 }
1639 EXPORT_SYMBOL(ib_sa_path_rec_get);
1640
1641 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1642 int status,
1643 struct ib_sa_mad *mad)
1644 {
1645 struct ib_sa_service_query *query =
1646 container_of(sa_query, struct ib_sa_service_query, sa_query);
1647
1648 if (mad) {
1649 struct ib_sa_service_rec rec;
1650
1651 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1652 mad->data, &rec);
1653 query->callback(status, &rec, query->context);
1654 } else
1655 query->callback(status, NULL, query->context);
1656 }
1657
1658 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1659 {
1660 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1661 }
1662
1663 /**
1664 * ib_sa_service_rec_query - Start Service Record operation
1665 * @client:SA client
1666 * @device:device to send request on
1667 * @port_num: port number to send request on
1668 * @method:SA method - should be get, set, or delete
1669 * @rec:Service Record to send in request
1670 * @comp_mask:component mask to send in request
1671 * @timeout_ms:time to wait for response
1672 * @gfp_mask:GFP mask to use for internal allocations
1673 * @callback:function called when request completes, times out or is
1674 * canceled
1675 * @context:opaque user context passed to callback
1676 * @sa_query:request context, used to cancel request
1677 *
1678 * Send a Service Record set/get/delete to the SA to register,
1679 * unregister or query a service record.
1680 * The callback function will be called when the request completes (or
1681 * fails); status is 0 for a successful response, -EINTR if the query
1682 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1683 * occurred sending the query. The resp parameter of the callback is
1684 * only valid if status is 0.
1685 *
1686 * If the return value of ib_sa_service_rec_query() is negative, it is an
1687 * error code. Otherwise it is a request ID that can be used to cancel
1688 * the query.
1689 */
1690 int ib_sa_service_rec_query(struct ib_sa_client *client,
1691 struct ib_device *device, u8 port_num, u8 method,
1692 struct ib_sa_service_rec *rec,
1693 ib_sa_comp_mask comp_mask,
1694 unsigned long timeout_ms, gfp_t gfp_mask,
1695 void (*callback)(int status,
1696 struct ib_sa_service_rec *resp,
1697 void *context),
1698 void *context,
1699 struct ib_sa_query **sa_query)
1700 {
1701 struct ib_sa_service_query *query;
1702 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1703 struct ib_sa_port *port;
1704 struct ib_mad_agent *agent;
1705 struct ib_sa_mad *mad;
1706 int ret;
1707
1708 if (!sa_dev)
1709 return -ENODEV;
1710
1711 port = &sa_dev->port[port_num - sa_dev->start_port];
1712 agent = port->agent;
1713
1714 if (method != IB_MGMT_METHOD_GET &&
1715 method != IB_MGMT_METHOD_SET &&
1716 method != IB_SA_METHOD_DELETE)
1717 return -EINVAL;
1718
1719 query = kzalloc(sizeof(*query), gfp_mask);
1720 if (!query)
1721 return -ENOMEM;
1722
1723 query->sa_query.port = port;
1724 ret = alloc_mad(&query->sa_query, gfp_mask);
1725 if (ret)
1726 goto err1;
1727
1728 ib_sa_client_get(client);
1729 query->sa_query.client = client;
1730 query->callback = callback;
1731 query->context = context;
1732
1733 mad = query->sa_query.mad_buf->mad;
1734 init_mad(&query->sa_query, agent);
1735
1736 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1737 query->sa_query.release = ib_sa_service_rec_release;
1738 mad->mad_hdr.method = method;
1739 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1740 mad->sa_hdr.comp_mask = comp_mask;
1741
1742 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
1743 rec, mad->data);
1744
1745 *sa_query = &query->sa_query;
1746
1747 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1748 if (ret < 0)
1749 goto err2;
1750
1751 return ret;
1752
1753 err2:
1754 *sa_query = NULL;
1755 ib_sa_client_put(query->sa_query.client);
1756 free_mad(&query->sa_query);
1757
1758 err1:
1759 kfree(query);
1760 return ret;
1761 }
1762 EXPORT_SYMBOL(ib_sa_service_rec_query);
1763
1764 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1765 int status,
1766 struct ib_sa_mad *mad)
1767 {
1768 struct ib_sa_mcmember_query *query =
1769 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1770
1771 if (mad) {
1772 struct ib_sa_mcmember_rec rec;
1773
1774 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1775 mad->data, &rec);
1776 query->callback(status, &rec, query->context);
1777 } else
1778 query->callback(status, NULL, query->context);
1779 }
1780
1781 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1782 {
1783 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1784 }
1785
1786 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1787 struct ib_device *device, u8 port_num,
1788 u8 method,
1789 struct ib_sa_mcmember_rec *rec,
1790 ib_sa_comp_mask comp_mask,
1791 unsigned long timeout_ms, gfp_t gfp_mask,
1792 void (*callback)(int status,
1793 struct ib_sa_mcmember_rec *resp,
1794 void *context),
1795 void *context,
1796 struct ib_sa_query **sa_query)
1797 {
1798 struct ib_sa_mcmember_query *query;
1799 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1800 struct ib_sa_port *port;
1801 struct ib_mad_agent *agent;
1802 struct ib_sa_mad *mad;
1803 int ret;
1804
1805 if (!sa_dev)
1806 return -ENODEV;
1807
1808 port = &sa_dev->port[port_num - sa_dev->start_port];
1809 agent = port->agent;
1810
1811 query = kzalloc(sizeof(*query), gfp_mask);
1812 if (!query)
1813 return -ENOMEM;
1814
1815 query->sa_query.port = port;
1816 ret = alloc_mad(&query->sa_query, gfp_mask);
1817 if (ret)
1818 goto err1;
1819
1820 ib_sa_client_get(client);
1821 query->sa_query.client = client;
1822 query->callback = callback;
1823 query->context = context;
1824
1825 mad = query->sa_query.mad_buf->mad;
1826 init_mad(&query->sa_query, agent);
1827
1828 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1829 query->sa_query.release = ib_sa_mcmember_rec_release;
1830 mad->mad_hdr.method = method;
1831 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1832 mad->sa_hdr.comp_mask = comp_mask;
1833
1834 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1835 rec, mad->data);
1836
1837 *sa_query = &query->sa_query;
1838
1839 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1840 if (ret < 0)
1841 goto err2;
1842
1843 return ret;
1844
1845 err2:
1846 *sa_query = NULL;
1847 ib_sa_client_put(query->sa_query.client);
1848 free_mad(&query->sa_query);
1849
1850 err1:
1851 kfree(query);
1852 return ret;
1853 }
1854
1855 /* Support GuidInfoRecord */
1856 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1857 int status,
1858 struct ib_sa_mad *mad)
1859 {
1860 struct ib_sa_guidinfo_query *query =
1861 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1862
1863 if (mad) {
1864 struct ib_sa_guidinfo_rec rec;
1865
1866 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1867 mad->data, &rec);
1868 query->callback(status, &rec, query->context);
1869 } else
1870 query->callback(status, NULL, query->context);
1871 }
1872
1873 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1874 {
1875 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1876 }
1877
1878 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1879 struct ib_device *device, u8 port_num,
1880 struct ib_sa_guidinfo_rec *rec,
1881 ib_sa_comp_mask comp_mask, u8 method,
1882 unsigned long timeout_ms, gfp_t gfp_mask,
1883 void (*callback)(int status,
1884 struct ib_sa_guidinfo_rec *resp,
1885 void *context),
1886 void *context,
1887 struct ib_sa_query **sa_query)
1888 {
1889 struct ib_sa_guidinfo_query *query;
1890 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1891 struct ib_sa_port *port;
1892 struct ib_mad_agent *agent;
1893 struct ib_sa_mad *mad;
1894 int ret;
1895
1896 if (!sa_dev)
1897 return -ENODEV;
1898
1899 if (method != IB_MGMT_METHOD_GET &&
1900 method != IB_MGMT_METHOD_SET &&
1901 method != IB_SA_METHOD_DELETE) {
1902 return -EINVAL;
1903 }
1904
1905 port = &sa_dev->port[port_num - sa_dev->start_port];
1906 agent = port->agent;
1907
1908 query = kzalloc(sizeof(*query), gfp_mask);
1909 if (!query)
1910 return -ENOMEM;
1911
1912 query->sa_query.port = port;
1913 ret = alloc_mad(&query->sa_query, gfp_mask);
1914 if (ret)
1915 goto err1;
1916
1917 ib_sa_client_get(client);
1918 query->sa_query.client = client;
1919 query->callback = callback;
1920 query->context = context;
1921
1922 mad = query->sa_query.mad_buf->mad;
1923 init_mad(&query->sa_query, agent);
1924
1925 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1926 query->sa_query.release = ib_sa_guidinfo_rec_release;
1927
1928 mad->mad_hdr.method = method;
1929 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1930 mad->sa_hdr.comp_mask = comp_mask;
1931
1932 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1933 mad->data);
1934
1935 *sa_query = &query->sa_query;
1936
1937 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1938 if (ret < 0)
1939 goto err2;
1940
1941 return ret;
1942
1943 err2:
1944 *sa_query = NULL;
1945 ib_sa_client_put(query->sa_query.client);
1946 free_mad(&query->sa_query);
1947
1948 err1:
1949 kfree(query);
1950 return ret;
1951 }
1952 EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
1953
1954 bool ib_sa_sendonly_fullmem_support(struct ib_sa_client *client,
1955 struct ib_device *device,
1956 u8 port_num)
1957 {
1958 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1959 struct ib_sa_port *port;
1960 bool ret = false;
1961 unsigned long flags;
1962
1963 if (!sa_dev)
1964 return ret;
1965
1966 port = &sa_dev->port[port_num - sa_dev->start_port];
1967
1968 spin_lock_irqsave(&port->classport_lock, flags);
1969 if ((port->classport_info.valid) &&
1970 (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_IB))
1971 ret = ib_get_cpi_capmask2(&port->classport_info.data.ib)
1972 & IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT;
1973 spin_unlock_irqrestore(&port->classport_lock, flags);
1974 return ret;
1975 }
1976 EXPORT_SYMBOL(ib_sa_sendonly_fullmem_support);
1977
1978 struct ib_classport_info_context {
1979 struct completion done;
1980 struct ib_sa_query *sa_query;
1981 };
1982
1983 static void ib_classportinfo_cb(void *context)
1984 {
1985 struct ib_classport_info_context *cb_ctx = context;
1986
1987 complete(&cb_ctx->done);
1988 }
1989
1990 static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
1991 int status,
1992 struct ib_sa_mad *mad)
1993 {
1994 unsigned long flags;
1995 struct ib_sa_classport_info_query *query =
1996 container_of(sa_query, struct ib_sa_classport_info_query, sa_query);
1997 struct ib_sa_classport_cache *info = &sa_query->port->classport_info;
1998
1999 if (mad) {
2000 if (sa_query->flags & IB_SA_QUERY_OPA) {
2001 struct opa_class_port_info rec;
2002
2003 ib_unpack(opa_classport_info_rec_table,
2004 ARRAY_SIZE(opa_classport_info_rec_table),
2005 mad->data, &rec);
2006
2007 spin_lock_irqsave(&sa_query->port->classport_lock,
2008 flags);
2009 if (!status && !info->valid) {
2010 memcpy(&info->data.opa, &rec,
2011 sizeof(info->data.opa));
2012
2013 info->valid = true;
2014 info->data.type = RDMA_CLASS_PORT_INFO_OPA;
2015 }
2016 spin_unlock_irqrestore(&sa_query->port->classport_lock,
2017 flags);
2018
2019 } else {
2020 struct ib_class_port_info rec;
2021
2022 ib_unpack(ib_classport_info_rec_table,
2023 ARRAY_SIZE(ib_classport_info_rec_table),
2024 mad->data, &rec);
2025
2026 spin_lock_irqsave(&sa_query->port->classport_lock,
2027 flags);
2028 if (!status && !info->valid) {
2029 memcpy(&info->data.ib, &rec,
2030 sizeof(info->data.ib));
2031
2032 info->valid = true;
2033 info->data.type = RDMA_CLASS_PORT_INFO_IB;
2034 }
2035 spin_unlock_irqrestore(&sa_query->port->classport_lock,
2036 flags);
2037 }
2038 }
2039 query->callback(query->context);
2040 }
2041
2042 static void ib_sa_classport_info_rec_release(struct ib_sa_query *sa_query)
2043 {
2044 kfree(container_of(sa_query, struct ib_sa_classport_info_query,
2045 sa_query));
2046 }
2047
2048 static int ib_sa_classport_info_rec_query(struct ib_sa_port *port,
2049 unsigned long timeout_ms,
2050 void (*callback)(void *context),
2051 void *context,
2052 struct ib_sa_query **sa_query)
2053 {
2054 struct ib_mad_agent *agent;
2055 struct ib_sa_classport_info_query *query;
2056 struct ib_sa_mad *mad;
2057 gfp_t gfp_mask = GFP_KERNEL;
2058 int ret;
2059
2060 agent = port->agent;
2061
2062 query = kzalloc(sizeof(*query), gfp_mask);
2063 if (!query)
2064 return -ENOMEM;
2065
2066 query->sa_query.port = port;
2067 query->sa_query.flags |= rdma_cap_opa_ah(port->agent->device,
2068 port->port_num) ?
2069 IB_SA_QUERY_OPA : 0;
2070 ret = alloc_mad(&query->sa_query, gfp_mask);
2071 if (ret)
2072 goto err_free;
2073
2074 query->callback = callback;
2075 query->context = context;
2076
2077 mad = query->sa_query.mad_buf->mad;
2078 init_mad(&query->sa_query, agent);
2079
2080 query->sa_query.callback = ib_sa_classport_info_rec_callback;
2081 query->sa_query.release = ib_sa_classport_info_rec_release;
2082 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
2083 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO);
2084 mad->sa_hdr.comp_mask = 0;
2085 *sa_query = &query->sa_query;
2086
2087 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
2088 if (ret < 0)
2089 goto err_free_mad;
2090
2091 return ret;
2092
2093 err_free_mad:
2094 *sa_query = NULL;
2095 free_mad(&query->sa_query);
2096
2097 err_free:
2098 kfree(query);
2099 return ret;
2100 }
2101
2102 static void update_ib_cpi(struct work_struct *work)
2103 {
2104 struct ib_sa_port *port =
2105 container_of(work, struct ib_sa_port, ib_cpi_work.work);
2106 struct ib_classport_info_context *cb_context;
2107 unsigned long flags;
2108 int ret;
2109
2110 /* If the classport info is valid, nothing
2111 * to do here.
2112 */
2113 spin_lock_irqsave(&port->classport_lock, flags);
2114 if (port->classport_info.valid) {
2115 spin_unlock_irqrestore(&port->classport_lock, flags);
2116 return;
2117 }
2118 spin_unlock_irqrestore(&port->classport_lock, flags);
2119
2120 cb_context = kmalloc(sizeof(*cb_context), GFP_KERNEL);
2121 if (!cb_context)
2122 goto err_nomem;
2123
2124 init_completion(&cb_context->done);
2125
2126 ret = ib_sa_classport_info_rec_query(port, 3000,
2127 ib_classportinfo_cb, cb_context,
2128 &cb_context->sa_query);
2129 if (ret < 0)
2130 goto free_cb_err;
2131 wait_for_completion(&cb_context->done);
2132 free_cb_err:
2133 kfree(cb_context);
2134 spin_lock_irqsave(&port->classport_lock, flags);
2135
2136 /* If the classport info is still not valid, the query should have
2137 * failed for some reason. Retry issuing the query
2138 */
2139 if (!port->classport_info.valid) {
2140 port->classport_info.retry_cnt++;
2141 if (port->classport_info.retry_cnt <=
2142 IB_SA_CPI_MAX_RETRY_CNT) {
2143 unsigned long delay =
2144 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2145
2146 queue_delayed_work(ib_wq, &port->ib_cpi_work, delay);
2147 }
2148 }
2149 spin_unlock_irqrestore(&port->classport_lock, flags);
2150
2151 err_nomem:
2152 return;
2153 }
2154
2155 static void send_handler(struct ib_mad_agent *agent,
2156 struct ib_mad_send_wc *mad_send_wc)
2157 {
2158 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
2159 unsigned long flags;
2160
2161 if (query->callback)
2162 switch (mad_send_wc->status) {
2163 case IB_WC_SUCCESS:
2164 /* No callback -- already got recv */
2165 break;
2166 case IB_WC_RESP_TIMEOUT_ERR:
2167 query->callback(query, -ETIMEDOUT, NULL);
2168 break;
2169 case IB_WC_WR_FLUSH_ERR:
2170 query->callback(query, -EINTR, NULL);
2171 break;
2172 default:
2173 query->callback(query, -EIO, NULL);
2174 break;
2175 }
2176
2177 xa_lock_irqsave(&queries, flags);
2178 __xa_erase(&queries, query->id);
2179 xa_unlock_irqrestore(&queries, flags);
2180
2181 free_mad(query);
2182 if (query->client)
2183 ib_sa_client_put(query->client);
2184 query->release(query);
2185 }
2186
2187 static void recv_handler(struct ib_mad_agent *mad_agent,
2188 struct ib_mad_send_buf *send_buf,
2189 struct ib_mad_recv_wc *mad_recv_wc)
2190 {
2191 struct ib_sa_query *query;
2192
2193 if (!send_buf)
2194 return;
2195
2196 query = send_buf->context[0];
2197 if (query->callback) {
2198 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
2199 query->callback(query,
2200 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
2201 -EINVAL : 0,
2202 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
2203 else
2204 query->callback(query, -EIO, NULL);
2205 }
2206
2207 ib_free_recv_mad(mad_recv_wc);
2208 }
2209
2210 static void update_sm_ah(struct work_struct *work)
2211 {
2212 struct ib_sa_port *port =
2213 container_of(work, struct ib_sa_port, update_task);
2214 struct ib_sa_sm_ah *new_ah;
2215 struct ib_port_attr port_attr;
2216 struct rdma_ah_attr ah_attr;
2217 bool grh_required;
2218
2219 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
2220 pr_warn("Couldn't query port\n");
2221 return;
2222 }
2223
2224 new_ah = kmalloc(sizeof(*new_ah), GFP_KERNEL);
2225 if (!new_ah)
2226 return;
2227
2228 kref_init(&new_ah->ref);
2229 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
2230
2231 new_ah->pkey_index = 0;
2232 if (ib_find_pkey(port->agent->device, port->port_num,
2233 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
2234 pr_err("Couldn't find index for default PKey\n");
2235
2236 memset(&ah_attr, 0, sizeof(ah_attr));
2237 ah_attr.type = rdma_ah_find_type(port->agent->device,
2238 port->port_num);
2239 rdma_ah_set_dlid(&ah_attr, port_attr.sm_lid);
2240 rdma_ah_set_sl(&ah_attr, port_attr.sm_sl);
2241 rdma_ah_set_port_num(&ah_attr, port->port_num);
2242
2243 grh_required = rdma_is_grh_required(port->agent->device,
2244 port->port_num);
2245
2246 /*
2247 * The OPA sm_lid of 0xFFFF needs special handling so that it can be
2248 * differentiated from a permissive LID of 0xFFFF. We set the
2249 * grh_required flag here so the SA can program the DGID in the
2250 * address handle appropriately
2251 */
2252 if (ah_attr.type == RDMA_AH_ATTR_TYPE_OPA &&
2253 (grh_required ||
2254 port_attr.sm_lid == be16_to_cpu(IB_LID_PERMISSIVE)))
2255 rdma_ah_set_make_grd(&ah_attr, true);
2256
2257 if (ah_attr.type == RDMA_AH_ATTR_TYPE_IB && grh_required) {
2258 rdma_ah_set_ah_flags(&ah_attr, IB_AH_GRH);
2259 rdma_ah_set_subnet_prefix(&ah_attr,
2260 cpu_to_be64(port_attr.subnet_prefix));
2261 rdma_ah_set_interface_id(&ah_attr,
2262 cpu_to_be64(IB_SA_WELL_KNOWN_GUID));
2263 }
2264
2265 new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr,
2266 RDMA_CREATE_AH_SLEEPABLE);
2267 if (IS_ERR(new_ah->ah)) {
2268 pr_warn("Couldn't create new SM AH\n");
2269 kfree(new_ah);
2270 return;
2271 }
2272
2273 spin_lock_irq(&port->ah_lock);
2274 if (port->sm_ah)
2275 kref_put(&port->sm_ah->ref, free_sm_ah);
2276 port->sm_ah = new_ah;
2277 spin_unlock_irq(&port->ah_lock);
2278 }
2279
2280 static void ib_sa_event(struct ib_event_handler *handler,
2281 struct ib_event *event)
2282 {
2283 if (event->event == IB_EVENT_PORT_ERR ||
2284 event->event == IB_EVENT_PORT_ACTIVE ||
2285 event->event == IB_EVENT_LID_CHANGE ||
2286 event->event == IB_EVENT_PKEY_CHANGE ||
2287 event->event == IB_EVENT_SM_CHANGE ||
2288 event->event == IB_EVENT_CLIENT_REREGISTER) {
2289 unsigned long flags;
2290 struct ib_sa_device *sa_dev =
2291 container_of(handler, typeof(*sa_dev), event_handler);
2292 u8 port_num = event->element.port_num - sa_dev->start_port;
2293 struct ib_sa_port *port = &sa_dev->port[port_num];
2294
2295 if (!rdma_cap_ib_sa(handler->device, port->port_num))
2296 return;
2297
2298 spin_lock_irqsave(&port->ah_lock, flags);
2299 if (port->sm_ah)
2300 kref_put(&port->sm_ah->ref, free_sm_ah);
2301 port->sm_ah = NULL;
2302 spin_unlock_irqrestore(&port->ah_lock, flags);
2303
2304 if (event->event == IB_EVENT_SM_CHANGE ||
2305 event->event == IB_EVENT_CLIENT_REREGISTER ||
2306 event->event == IB_EVENT_LID_CHANGE ||
2307 event->event == IB_EVENT_PORT_ACTIVE) {
2308 unsigned long delay =
2309 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2310
2311 spin_lock_irqsave(&port->classport_lock, flags);
2312 port->classport_info.valid = false;
2313 port->classport_info.retry_cnt = 0;
2314 spin_unlock_irqrestore(&port->classport_lock, flags);
2315 queue_delayed_work(ib_wq,
2316 &port->ib_cpi_work, delay);
2317 }
2318 queue_work(ib_wq, &sa_dev->port[port_num].update_task);
2319 }
2320 }
2321
2322 static int ib_sa_add_one(struct ib_device *device)
2323 {
2324 struct ib_sa_device *sa_dev;
2325 int s, e, i;
2326 int count = 0;
2327 int ret;
2328
2329 s = rdma_start_port(device);
2330 e = rdma_end_port(device);
2331
2332 sa_dev = kzalloc(struct_size(sa_dev, port, e - s + 1), GFP_KERNEL);
2333 if (!sa_dev)
2334 return -ENOMEM;
2335
2336 sa_dev->start_port = s;
2337 sa_dev->end_port = e;
2338
2339 for (i = 0; i <= e - s; ++i) {
2340 spin_lock_init(&sa_dev->port[i].ah_lock);
2341 if (!rdma_cap_ib_sa(device, i + 1))
2342 continue;
2343
2344 sa_dev->port[i].sm_ah = NULL;
2345 sa_dev->port[i].port_num = i + s;
2346
2347 spin_lock_init(&sa_dev->port[i].classport_lock);
2348 sa_dev->port[i].classport_info.valid = false;
2349
2350 sa_dev->port[i].agent =
2351 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
2352 NULL, 0, send_handler,
2353 recv_handler, sa_dev, 0);
2354 if (IS_ERR(sa_dev->port[i].agent)) {
2355 ret = PTR_ERR(sa_dev->port[i].agent);
2356 goto err;
2357 }
2358
2359 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
2360 INIT_DELAYED_WORK(&sa_dev->port[i].ib_cpi_work,
2361 update_ib_cpi);
2362
2363 count++;
2364 }
2365
2366 if (!count) {
2367 ret = -EOPNOTSUPP;
2368 goto free;
2369 }
2370
2371 ib_set_client_data(device, &sa_client, sa_dev);
2372
2373 /*
2374 * We register our event handler after everything is set up,
2375 * and then update our cached info after the event handler is
2376 * registered to avoid any problems if a port changes state
2377 * during our initialization.
2378 */
2379
2380 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
2381 ib_register_event_handler(&sa_dev->event_handler);
2382
2383 for (i = 0; i <= e - s; ++i) {
2384 if (rdma_cap_ib_sa(device, i + 1))
2385 update_sm_ah(&sa_dev->port[i].update_task);
2386 }
2387
2388 return 0;
2389
2390 err:
2391 while (--i >= 0) {
2392 if (rdma_cap_ib_sa(device, i + 1))
2393 ib_unregister_mad_agent(sa_dev->port[i].agent);
2394 }
2395 free:
2396 kfree(sa_dev);
2397 return ret;
2398 }
2399
2400 static void ib_sa_remove_one(struct ib_device *device, void *client_data)
2401 {
2402 struct ib_sa_device *sa_dev = client_data;
2403 int i;
2404
2405 ib_unregister_event_handler(&sa_dev->event_handler);
2406 flush_workqueue(ib_wq);
2407
2408 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
2409 if (rdma_cap_ib_sa(device, i + 1)) {
2410 cancel_delayed_work_sync(&sa_dev->port[i].ib_cpi_work);
2411 ib_unregister_mad_agent(sa_dev->port[i].agent);
2412 if (sa_dev->port[i].sm_ah)
2413 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
2414 }
2415
2416 }
2417
2418 kfree(sa_dev);
2419 }
2420
2421 int ib_sa_init(void)
2422 {
2423 int ret;
2424
2425 get_random_bytes(&tid, sizeof tid);
2426
2427 atomic_set(&ib_nl_sa_request_seq, 0);
2428
2429 ret = ib_register_client(&sa_client);
2430 if (ret) {
2431 pr_err("Couldn't register ib_sa client\n");
2432 goto err1;
2433 }
2434
2435 ret = mcast_init();
2436 if (ret) {
2437 pr_err("Couldn't initialize multicast handling\n");
2438 goto err2;
2439 }
2440
2441 ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM);
2442 if (!ib_nl_wq) {
2443 ret = -ENOMEM;
2444 goto err3;
2445 }
2446
2447 INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
2448
2449 return 0;
2450
2451 err3:
2452 mcast_cleanup();
2453 err2:
2454 ib_unregister_client(&sa_client);
2455 err1:
2456 return ret;
2457 }
2458
2459 void ib_sa_cleanup(void)
2460 {
2461 cancel_delayed_work(&ib_nl_timed_work);
2462 flush_workqueue(ib_nl_wq);
2463 destroy_workqueue(ib_nl_wq);
2464 mcast_cleanup();
2465 ib_unregister_client(&sa_client);
2466 WARN_ON(!xa_empty(&queries));
2467 }
Linux with added FPC-III support