Linux kernel mirror (for testing)
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linux
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 "sa.h"
54#include "core_priv.h"
55
56#define IB_SA_LOCAL_SVC_TIMEOUT_MIN 100
57#define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT 2000
58#define IB_SA_LOCAL_SVC_TIMEOUT_MAX 200000
59#define IB_SA_CPI_MAX_RETRY_CNT 3
60#define IB_SA_CPI_RETRY_WAIT 1000 /*msecs */
61static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT;
62
63struct ib_sa_sm_ah {
64 struct ib_ah *ah;
65 struct kref ref;
66 u16 pkey_index;
67 u8 src_path_mask;
68};
69
70enum rdma_class_port_info_type {
71 RDMA_CLASS_PORT_INFO_IB,
72 RDMA_CLASS_PORT_INFO_OPA
73};
74
75struct rdma_class_port_info {
76 enum rdma_class_port_info_type type;
77 union {
78 struct ib_class_port_info ib;
79 struct opa_class_port_info opa;
80 };
81};
82
83struct ib_sa_classport_cache {
84 bool valid;
85 int retry_cnt;
86 struct rdma_class_port_info data;
87};
88
89struct ib_sa_port {
90 struct ib_mad_agent *agent;
91 struct ib_sa_sm_ah *sm_ah;
92 struct work_struct update_task;
93 struct ib_sa_classport_cache classport_info;
94 struct delayed_work ib_cpi_work;
95 spinlock_t classport_lock; /* protects class port info set */
96 spinlock_t ah_lock;
97 u8 port_num;
98};
99
100struct ib_sa_device {
101 int start_port, end_port;
102 struct ib_event_handler event_handler;
103 struct ib_sa_port port[0];
104};
105
106struct ib_sa_query {
107 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
108 void (*release)(struct ib_sa_query *);
109 struct ib_sa_client *client;
110 struct ib_sa_port *port;
111 struct ib_mad_send_buf *mad_buf;
112 struct ib_sa_sm_ah *sm_ah;
113 int id;
114 u32 flags;
115 struct list_head list; /* Local svc request list */
116 u32 seq; /* Local svc request sequence number */
117 unsigned long timeout; /* Local svc timeout */
118 u8 path_use; /* How will the pathrecord be used */
119};
120
121#define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001
122#define IB_SA_CANCEL 0x00000002
123#define IB_SA_QUERY_OPA 0x00000004
124
125struct ib_sa_service_query {
126 void (*callback)(int, struct ib_sa_service_rec *, void *);
127 void *context;
128 struct ib_sa_query sa_query;
129};
130
131struct ib_sa_path_query {
132 void (*callback)(int, struct sa_path_rec *, void *);
133 void *context;
134 struct ib_sa_query sa_query;
135 struct sa_path_rec *conv_pr;
136};
137
138struct ib_sa_guidinfo_query {
139 void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
140 void *context;
141 struct ib_sa_query sa_query;
142};
143
144struct ib_sa_classport_info_query {
145 void (*callback)(void *);
146 void *context;
147 struct ib_sa_query sa_query;
148};
149
150struct ib_sa_mcmember_query {
151 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
152 void *context;
153 struct ib_sa_query sa_query;
154};
155
156static LIST_HEAD(ib_nl_request_list);
157static DEFINE_SPINLOCK(ib_nl_request_lock);
158static atomic_t ib_nl_sa_request_seq;
159static struct workqueue_struct *ib_nl_wq;
160static struct delayed_work ib_nl_timed_work;
161static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = {
162 [LS_NLA_TYPE_PATH_RECORD] = {.type = NLA_BINARY,
163 .len = sizeof(struct ib_path_rec_data)},
164 [LS_NLA_TYPE_TIMEOUT] = {.type = NLA_U32},
165 [LS_NLA_TYPE_SERVICE_ID] = {.type = NLA_U64},
166 [LS_NLA_TYPE_DGID] = {.type = NLA_BINARY,
167 .len = sizeof(struct rdma_nla_ls_gid)},
168 [LS_NLA_TYPE_SGID] = {.type = NLA_BINARY,
169 .len = sizeof(struct rdma_nla_ls_gid)},
170 [LS_NLA_TYPE_TCLASS] = {.type = NLA_U8},
171 [LS_NLA_TYPE_PKEY] = {.type = NLA_U16},
172 [LS_NLA_TYPE_QOS_CLASS] = {.type = NLA_U16},
173};
174
175
176static void ib_sa_add_one(struct ib_device *device);
177static void ib_sa_remove_one(struct ib_device *device, void *client_data);
178
179static struct ib_client sa_client = {
180 .name = "sa",
181 .add = ib_sa_add_one,
182 .remove = ib_sa_remove_one
183};
184
185static DEFINE_SPINLOCK(idr_lock);
186static DEFINE_IDR(query_idr);
187
188static DEFINE_SPINLOCK(tid_lock);
189static u32 tid;
190
191#define PATH_REC_FIELD(field) \
192 .struct_offset_bytes = offsetof(struct sa_path_rec, field), \
193 .struct_size_bytes = sizeof((struct sa_path_rec *)0)->field, \
194 .field_name = "sa_path_rec:" #field
195
196static const struct ib_field path_rec_table[] = {
197 { PATH_REC_FIELD(service_id),
198 .offset_words = 0,
199 .offset_bits = 0,
200 .size_bits = 64 },
201 { PATH_REC_FIELD(dgid),
202 .offset_words = 2,
203 .offset_bits = 0,
204 .size_bits = 128 },
205 { PATH_REC_FIELD(sgid),
206 .offset_words = 6,
207 .offset_bits = 0,
208 .size_bits = 128 },
209 { PATH_REC_FIELD(ib.dlid),
210 .offset_words = 10,
211 .offset_bits = 0,
212 .size_bits = 16 },
213 { PATH_REC_FIELD(ib.slid),
214 .offset_words = 10,
215 .offset_bits = 16,
216 .size_bits = 16 },
217 { PATH_REC_FIELD(ib.raw_traffic),
218 .offset_words = 11,
219 .offset_bits = 0,
220 .size_bits = 1 },
221 { RESERVED,
222 .offset_words = 11,
223 .offset_bits = 1,
224 .size_bits = 3 },
225 { PATH_REC_FIELD(flow_label),
226 .offset_words = 11,
227 .offset_bits = 4,
228 .size_bits = 20 },
229 { PATH_REC_FIELD(hop_limit),
230 .offset_words = 11,
231 .offset_bits = 24,
232 .size_bits = 8 },
233 { PATH_REC_FIELD(traffic_class),
234 .offset_words = 12,
235 .offset_bits = 0,
236 .size_bits = 8 },
237 { PATH_REC_FIELD(reversible),
238 .offset_words = 12,
239 .offset_bits = 8,
240 .size_bits = 1 },
241 { PATH_REC_FIELD(numb_path),
242 .offset_words = 12,
243 .offset_bits = 9,
244 .size_bits = 7 },
245 { PATH_REC_FIELD(pkey),
246 .offset_words = 12,
247 .offset_bits = 16,
248 .size_bits = 16 },
249 { PATH_REC_FIELD(qos_class),
250 .offset_words = 13,
251 .offset_bits = 0,
252 .size_bits = 12 },
253 { PATH_REC_FIELD(sl),
254 .offset_words = 13,
255 .offset_bits = 12,
256 .size_bits = 4 },
257 { PATH_REC_FIELD(mtu_selector),
258 .offset_words = 13,
259 .offset_bits = 16,
260 .size_bits = 2 },
261 { PATH_REC_FIELD(mtu),
262 .offset_words = 13,
263 .offset_bits = 18,
264 .size_bits = 6 },
265 { PATH_REC_FIELD(rate_selector),
266 .offset_words = 13,
267 .offset_bits = 24,
268 .size_bits = 2 },
269 { PATH_REC_FIELD(rate),
270 .offset_words = 13,
271 .offset_bits = 26,
272 .size_bits = 6 },
273 { PATH_REC_FIELD(packet_life_time_selector),
274 .offset_words = 14,
275 .offset_bits = 0,
276 .size_bits = 2 },
277 { PATH_REC_FIELD(packet_life_time),
278 .offset_words = 14,
279 .offset_bits = 2,
280 .size_bits = 6 },
281 { PATH_REC_FIELD(preference),
282 .offset_words = 14,
283 .offset_bits = 8,
284 .size_bits = 8 },
285 { RESERVED,
286 .offset_words = 14,
287 .offset_bits = 16,
288 .size_bits = 48 },
289};
290
291#define OPA_PATH_REC_FIELD(field) \
292 .struct_offset_bytes = \
293 offsetof(struct sa_path_rec, field), \
294 .struct_size_bytes = \
295 sizeof((struct sa_path_rec *)0)->field, \
296 .field_name = "sa_path_rec:" #field
297
298static const struct ib_field opa_path_rec_table[] = {
299 { OPA_PATH_REC_FIELD(service_id),
300 .offset_words = 0,
301 .offset_bits = 0,
302 .size_bits = 64 },
303 { OPA_PATH_REC_FIELD(dgid),
304 .offset_words = 2,
305 .offset_bits = 0,
306 .size_bits = 128 },
307 { OPA_PATH_REC_FIELD(sgid),
308 .offset_words = 6,
309 .offset_bits = 0,
310 .size_bits = 128 },
311 { OPA_PATH_REC_FIELD(opa.dlid),
312 .offset_words = 10,
313 .offset_bits = 0,
314 .size_bits = 32 },
315 { OPA_PATH_REC_FIELD(opa.slid),
316 .offset_words = 11,
317 .offset_bits = 0,
318 .size_bits = 32 },
319 { OPA_PATH_REC_FIELD(opa.raw_traffic),
320 .offset_words = 12,
321 .offset_bits = 0,
322 .size_bits = 1 },
323 { RESERVED,
324 .offset_words = 12,
325 .offset_bits = 1,
326 .size_bits = 3 },
327 { OPA_PATH_REC_FIELD(flow_label),
328 .offset_words = 12,
329 .offset_bits = 4,
330 .size_bits = 20 },
331 { OPA_PATH_REC_FIELD(hop_limit),
332 .offset_words = 12,
333 .offset_bits = 24,
334 .size_bits = 8 },
335 { OPA_PATH_REC_FIELD(traffic_class),
336 .offset_words = 13,
337 .offset_bits = 0,
338 .size_bits = 8 },
339 { OPA_PATH_REC_FIELD(reversible),
340 .offset_words = 13,
341 .offset_bits = 8,
342 .size_bits = 1 },
343 { OPA_PATH_REC_FIELD(numb_path),
344 .offset_words = 13,
345 .offset_bits = 9,
346 .size_bits = 7 },
347 { OPA_PATH_REC_FIELD(pkey),
348 .offset_words = 13,
349 .offset_bits = 16,
350 .size_bits = 16 },
351 { OPA_PATH_REC_FIELD(opa.l2_8B),
352 .offset_words = 14,
353 .offset_bits = 0,
354 .size_bits = 1 },
355 { OPA_PATH_REC_FIELD(opa.l2_10B),
356 .offset_words = 14,
357 .offset_bits = 1,
358 .size_bits = 1 },
359 { OPA_PATH_REC_FIELD(opa.l2_9B),
360 .offset_words = 14,
361 .offset_bits = 2,
362 .size_bits = 1 },
363 { OPA_PATH_REC_FIELD(opa.l2_16B),
364 .offset_words = 14,
365 .offset_bits = 3,
366 .size_bits = 1 },
367 { RESERVED,
368 .offset_words = 14,
369 .offset_bits = 4,
370 .size_bits = 2 },
371 { OPA_PATH_REC_FIELD(opa.qos_type),
372 .offset_words = 14,
373 .offset_bits = 6,
374 .size_bits = 2 },
375 { OPA_PATH_REC_FIELD(opa.qos_priority),
376 .offset_words = 14,
377 .offset_bits = 8,
378 .size_bits = 8 },
379 { RESERVED,
380 .offset_words = 14,
381 .offset_bits = 16,
382 .size_bits = 3 },
383 { OPA_PATH_REC_FIELD(sl),
384 .offset_words = 14,
385 .offset_bits = 19,
386 .size_bits = 5 },
387 { RESERVED,
388 .offset_words = 14,
389 .offset_bits = 24,
390 .size_bits = 8 },
391 { OPA_PATH_REC_FIELD(mtu_selector),
392 .offset_words = 15,
393 .offset_bits = 0,
394 .size_bits = 2 },
395 { OPA_PATH_REC_FIELD(mtu),
396 .offset_words = 15,
397 .offset_bits = 2,
398 .size_bits = 6 },
399 { OPA_PATH_REC_FIELD(rate_selector),
400 .offset_words = 15,
401 .offset_bits = 8,
402 .size_bits = 2 },
403 { OPA_PATH_REC_FIELD(rate),
404 .offset_words = 15,
405 .offset_bits = 10,
406 .size_bits = 6 },
407 { OPA_PATH_REC_FIELD(packet_life_time_selector),
408 .offset_words = 15,
409 .offset_bits = 16,
410 .size_bits = 2 },
411 { OPA_PATH_REC_FIELD(packet_life_time),
412 .offset_words = 15,
413 .offset_bits = 18,
414 .size_bits = 6 },
415 { OPA_PATH_REC_FIELD(preference),
416 .offset_words = 15,
417 .offset_bits = 24,
418 .size_bits = 8 },
419};
420
421#define MCMEMBER_REC_FIELD(field) \
422 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
423 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
424 .field_name = "sa_mcmember_rec:" #field
425
426static const struct ib_field mcmember_rec_table[] = {
427 { MCMEMBER_REC_FIELD(mgid),
428 .offset_words = 0,
429 .offset_bits = 0,
430 .size_bits = 128 },
431 { MCMEMBER_REC_FIELD(port_gid),
432 .offset_words = 4,
433 .offset_bits = 0,
434 .size_bits = 128 },
435 { MCMEMBER_REC_FIELD(qkey),
436 .offset_words = 8,
437 .offset_bits = 0,
438 .size_bits = 32 },
439 { MCMEMBER_REC_FIELD(mlid),
440 .offset_words = 9,
441 .offset_bits = 0,
442 .size_bits = 16 },
443 { MCMEMBER_REC_FIELD(mtu_selector),
444 .offset_words = 9,
445 .offset_bits = 16,
446 .size_bits = 2 },
447 { MCMEMBER_REC_FIELD(mtu),
448 .offset_words = 9,
449 .offset_bits = 18,
450 .size_bits = 6 },
451 { MCMEMBER_REC_FIELD(traffic_class),
452 .offset_words = 9,
453 .offset_bits = 24,
454 .size_bits = 8 },
455 { MCMEMBER_REC_FIELD(pkey),
456 .offset_words = 10,
457 .offset_bits = 0,
458 .size_bits = 16 },
459 { MCMEMBER_REC_FIELD(rate_selector),
460 .offset_words = 10,
461 .offset_bits = 16,
462 .size_bits = 2 },
463 { MCMEMBER_REC_FIELD(rate),
464 .offset_words = 10,
465 .offset_bits = 18,
466 .size_bits = 6 },
467 { MCMEMBER_REC_FIELD(packet_life_time_selector),
468 .offset_words = 10,
469 .offset_bits = 24,
470 .size_bits = 2 },
471 { MCMEMBER_REC_FIELD(packet_life_time),
472 .offset_words = 10,
473 .offset_bits = 26,
474 .size_bits = 6 },
475 { MCMEMBER_REC_FIELD(sl),
476 .offset_words = 11,
477 .offset_bits = 0,
478 .size_bits = 4 },
479 { MCMEMBER_REC_FIELD(flow_label),
480 .offset_words = 11,
481 .offset_bits = 4,
482 .size_bits = 20 },
483 { MCMEMBER_REC_FIELD(hop_limit),
484 .offset_words = 11,
485 .offset_bits = 24,
486 .size_bits = 8 },
487 { MCMEMBER_REC_FIELD(scope),
488 .offset_words = 12,
489 .offset_bits = 0,
490 .size_bits = 4 },
491 { MCMEMBER_REC_FIELD(join_state),
492 .offset_words = 12,
493 .offset_bits = 4,
494 .size_bits = 4 },
495 { MCMEMBER_REC_FIELD(proxy_join),
496 .offset_words = 12,
497 .offset_bits = 8,
498 .size_bits = 1 },
499 { RESERVED,
500 .offset_words = 12,
501 .offset_bits = 9,
502 .size_bits = 23 },
503};
504
505#define SERVICE_REC_FIELD(field) \
506 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
507 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
508 .field_name = "sa_service_rec:" #field
509
510static const struct ib_field service_rec_table[] = {
511 { SERVICE_REC_FIELD(id),
512 .offset_words = 0,
513 .offset_bits = 0,
514 .size_bits = 64 },
515 { SERVICE_REC_FIELD(gid),
516 .offset_words = 2,
517 .offset_bits = 0,
518 .size_bits = 128 },
519 { SERVICE_REC_FIELD(pkey),
520 .offset_words = 6,
521 .offset_bits = 0,
522 .size_bits = 16 },
523 { SERVICE_REC_FIELD(lease),
524 .offset_words = 7,
525 .offset_bits = 0,
526 .size_bits = 32 },
527 { SERVICE_REC_FIELD(key),
528 .offset_words = 8,
529 .offset_bits = 0,
530 .size_bits = 128 },
531 { SERVICE_REC_FIELD(name),
532 .offset_words = 12,
533 .offset_bits = 0,
534 .size_bits = 64*8 },
535 { SERVICE_REC_FIELD(data8),
536 .offset_words = 28,
537 .offset_bits = 0,
538 .size_bits = 16*8 },
539 { SERVICE_REC_FIELD(data16),
540 .offset_words = 32,
541 .offset_bits = 0,
542 .size_bits = 8*16 },
543 { SERVICE_REC_FIELD(data32),
544 .offset_words = 36,
545 .offset_bits = 0,
546 .size_bits = 4*32 },
547 { SERVICE_REC_FIELD(data64),
548 .offset_words = 40,
549 .offset_bits = 0,
550 .size_bits = 2*64 },
551};
552
553#define CLASSPORTINFO_REC_FIELD(field) \
554 .struct_offset_bytes = offsetof(struct ib_class_port_info, field), \
555 .struct_size_bytes = sizeof((struct ib_class_port_info *)0)->field, \
556 .field_name = "ib_class_port_info:" #field
557
558static const struct ib_field ib_classport_info_rec_table[] = {
559 { CLASSPORTINFO_REC_FIELD(base_version),
560 .offset_words = 0,
561 .offset_bits = 0,
562 .size_bits = 8 },
563 { CLASSPORTINFO_REC_FIELD(class_version),
564 .offset_words = 0,
565 .offset_bits = 8,
566 .size_bits = 8 },
567 { CLASSPORTINFO_REC_FIELD(capability_mask),
568 .offset_words = 0,
569 .offset_bits = 16,
570 .size_bits = 16 },
571 { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
572 .offset_words = 1,
573 .offset_bits = 0,
574 .size_bits = 32 },
575 { CLASSPORTINFO_REC_FIELD(redirect_gid),
576 .offset_words = 2,
577 .offset_bits = 0,
578 .size_bits = 128 },
579 { CLASSPORTINFO_REC_FIELD(redirect_tcslfl),
580 .offset_words = 6,
581 .offset_bits = 0,
582 .size_bits = 32 },
583 { CLASSPORTINFO_REC_FIELD(redirect_lid),
584 .offset_words = 7,
585 .offset_bits = 0,
586 .size_bits = 16 },
587 { CLASSPORTINFO_REC_FIELD(redirect_pkey),
588 .offset_words = 7,
589 .offset_bits = 16,
590 .size_bits = 16 },
591
592 { CLASSPORTINFO_REC_FIELD(redirect_qp),
593 .offset_words = 8,
594 .offset_bits = 0,
595 .size_bits = 32 },
596 { CLASSPORTINFO_REC_FIELD(redirect_qkey),
597 .offset_words = 9,
598 .offset_bits = 0,
599 .size_bits = 32 },
600
601 { CLASSPORTINFO_REC_FIELD(trap_gid),
602 .offset_words = 10,
603 .offset_bits = 0,
604 .size_bits = 128 },
605 { CLASSPORTINFO_REC_FIELD(trap_tcslfl),
606 .offset_words = 14,
607 .offset_bits = 0,
608 .size_bits = 32 },
609
610 { CLASSPORTINFO_REC_FIELD(trap_lid),
611 .offset_words = 15,
612 .offset_bits = 0,
613 .size_bits = 16 },
614 { CLASSPORTINFO_REC_FIELD(trap_pkey),
615 .offset_words = 15,
616 .offset_bits = 16,
617 .size_bits = 16 },
618
619 { CLASSPORTINFO_REC_FIELD(trap_hlqp),
620 .offset_words = 16,
621 .offset_bits = 0,
622 .size_bits = 32 },
623 { CLASSPORTINFO_REC_FIELD(trap_qkey),
624 .offset_words = 17,
625 .offset_bits = 0,
626 .size_bits = 32 },
627};
628
629#define OPA_CLASSPORTINFO_REC_FIELD(field) \
630 .struct_offset_bytes =\
631 offsetof(struct opa_class_port_info, field), \
632 .struct_size_bytes = \
633 sizeof((struct opa_class_port_info *)0)->field, \
634 .field_name = "opa_class_port_info:" #field
635
636static const struct ib_field opa_classport_info_rec_table[] = {
637 { OPA_CLASSPORTINFO_REC_FIELD(base_version),
638 .offset_words = 0,
639 .offset_bits = 0,
640 .size_bits = 8 },
641 { OPA_CLASSPORTINFO_REC_FIELD(class_version),
642 .offset_words = 0,
643 .offset_bits = 8,
644 .size_bits = 8 },
645 { OPA_CLASSPORTINFO_REC_FIELD(cap_mask),
646 .offset_words = 0,
647 .offset_bits = 16,
648 .size_bits = 16 },
649 { OPA_CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
650 .offset_words = 1,
651 .offset_bits = 0,
652 .size_bits = 32 },
653 { OPA_CLASSPORTINFO_REC_FIELD(redirect_gid),
654 .offset_words = 2,
655 .offset_bits = 0,
656 .size_bits = 128 },
657 { OPA_CLASSPORTINFO_REC_FIELD(redirect_tc_fl),
658 .offset_words = 6,
659 .offset_bits = 0,
660 .size_bits = 32 },
661 { OPA_CLASSPORTINFO_REC_FIELD(redirect_lid),
662 .offset_words = 7,
663 .offset_bits = 0,
664 .size_bits = 32 },
665 { OPA_CLASSPORTINFO_REC_FIELD(redirect_sl_qp),
666 .offset_words = 8,
667 .offset_bits = 0,
668 .size_bits = 32 },
669 { OPA_CLASSPORTINFO_REC_FIELD(redirect_qkey),
670 .offset_words = 9,
671 .offset_bits = 0,
672 .size_bits = 32 },
673 { OPA_CLASSPORTINFO_REC_FIELD(trap_gid),
674 .offset_words = 10,
675 .offset_bits = 0,
676 .size_bits = 128 },
677 { OPA_CLASSPORTINFO_REC_FIELD(trap_tc_fl),
678 .offset_words = 14,
679 .offset_bits = 0,
680 .size_bits = 32 },
681 { OPA_CLASSPORTINFO_REC_FIELD(trap_lid),
682 .offset_words = 15,
683 .offset_bits = 0,
684 .size_bits = 32 },
685 { OPA_CLASSPORTINFO_REC_FIELD(trap_hl_qp),
686 .offset_words = 16,
687 .offset_bits = 0,
688 .size_bits = 32 },
689 { OPA_CLASSPORTINFO_REC_FIELD(trap_qkey),
690 .offset_words = 17,
691 .offset_bits = 0,
692 .size_bits = 32 },
693 { OPA_CLASSPORTINFO_REC_FIELD(trap_pkey),
694 .offset_words = 18,
695 .offset_bits = 0,
696 .size_bits = 16 },
697 { OPA_CLASSPORTINFO_REC_FIELD(redirect_pkey),
698 .offset_words = 18,
699 .offset_bits = 16,
700 .size_bits = 16 },
701 { OPA_CLASSPORTINFO_REC_FIELD(trap_sl_rsvd),
702 .offset_words = 19,
703 .offset_bits = 0,
704 .size_bits = 8 },
705 { RESERVED,
706 .offset_words = 19,
707 .offset_bits = 8,
708 .size_bits = 24 },
709};
710
711#define GUIDINFO_REC_FIELD(field) \
712 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \
713 .struct_size_bytes = sizeof((struct ib_sa_guidinfo_rec *) 0)->field, \
714 .field_name = "sa_guidinfo_rec:" #field
715
716static 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
739static inline void ib_sa_disable_local_svc(struct ib_sa_query *query)
740{
741 query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE;
742}
743
744static inline int ib_sa_query_cancelled(struct ib_sa_query *query)
745{
746 return (query->flags & IB_SA_CANCEL);
747}
748
749static 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 = (struct rdma_ls_resolve_header *)
763 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
803static 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
833static 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 = ibnl_multicast(skb, nlh, RDMA_NL_GROUP_LS, gfp_mask);
866 if (!ret)
867 ret = len;
868 else
869 ret = 0;
870
871 return ret;
872}
873
874static 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
907static 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
930static void send_handler(struct ib_mad_agent *agent,
931 struct ib_mad_send_wc *mad_send_wc);
932
933static 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
985static 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
1024int ib_nl_handle_set_timeout(struct sk_buff *skb,
1025 struct netlink_callback *cb)
1026{
1027 const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh;
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 !netlink_capable(skb, CAP_NET_ADMIN))
1039 return -EPERM;
1040
1041 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1042 nlmsg_len(nlh), ib_nl_policy, NULL);
1043 attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT];
1044 if (ret || !attr)
1045 goto settimeout_out;
1046
1047 timeout = *(int *) nla_data(attr);
1048 if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN)
1049 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN;
1050 if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX)
1051 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX;
1052
1053 delta = timeout - sa_local_svc_timeout_ms;
1054 if (delta < 0)
1055 abs_delta = -delta;
1056 else
1057 abs_delta = delta;
1058
1059 if (delta != 0) {
1060 spin_lock_irqsave(&ib_nl_request_lock, flags);
1061 sa_local_svc_timeout_ms = timeout;
1062 list_for_each_entry(query, &ib_nl_request_list, list) {
1063 if (delta < 0 && abs_delta > query->timeout)
1064 query->timeout = 0;
1065 else
1066 query->timeout += delta;
1067
1068 /* Get the new delay from the first entry */
1069 if (!delay) {
1070 delay = query->timeout - jiffies;
1071 if (delay <= 0)
1072 delay = 1;
1073 }
1074 }
1075 if (delay)
1076 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work,
1077 (unsigned long)delay);
1078 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1079 }
1080
1081settimeout_out:
1082 return skb->len;
1083}
1084
1085static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh)
1086{
1087 struct nlattr *tb[LS_NLA_TYPE_MAX];
1088 int ret;
1089
1090 if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR)
1091 return 0;
1092
1093 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1094 nlmsg_len(nlh), ib_nl_policy, NULL);
1095 if (ret)
1096 return 0;
1097
1098 return 1;
1099}
1100
1101int ib_nl_handle_resolve_resp(struct sk_buff *skb,
1102 struct netlink_callback *cb)
1103{
1104 const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh;
1105 unsigned long flags;
1106 struct ib_sa_query *query;
1107 struct ib_mad_send_buf *send_buf;
1108 struct ib_mad_send_wc mad_send_wc;
1109 int found = 0;
1110 int ret;
1111
1112 if ((nlh->nlmsg_flags & NLM_F_REQUEST) ||
1113 !(NETLINK_CB(skb).sk) ||
1114 !netlink_capable(skb, CAP_NET_ADMIN))
1115 return -EPERM;
1116
1117 spin_lock_irqsave(&ib_nl_request_lock, flags);
1118 list_for_each_entry(query, &ib_nl_request_list, list) {
1119 /*
1120 * If the query is cancelled, let the timeout routine
1121 * take care of it.
1122 */
1123 if (nlh->nlmsg_seq == query->seq) {
1124 found = !ib_sa_query_cancelled(query);
1125 if (found)
1126 list_del(&query->list);
1127 break;
1128 }
1129 }
1130
1131 if (!found) {
1132 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1133 goto resp_out;
1134 }
1135
1136 send_buf = query->mad_buf;
1137
1138 if (!ib_nl_is_good_resolve_resp(nlh)) {
1139 /* if the result is a failure, send out the packet via IB */
1140 ib_sa_disable_local_svc(query);
1141 ret = ib_post_send_mad(query->mad_buf, NULL);
1142 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1143 if (ret) {
1144 mad_send_wc.send_buf = send_buf;
1145 mad_send_wc.status = IB_WC_GENERAL_ERR;
1146 send_handler(query->port->agent, &mad_send_wc);
1147 }
1148 } else {
1149 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1150 ib_nl_process_good_resolve_rsp(query, nlh);
1151 }
1152
1153resp_out:
1154 return skb->len;
1155}
1156
1157static void free_sm_ah(struct kref *kref)
1158{
1159 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
1160
1161 rdma_destroy_ah(sm_ah->ah);
1162 kfree(sm_ah);
1163}
1164
1165void ib_sa_register_client(struct ib_sa_client *client)
1166{
1167 atomic_set(&client->users, 1);
1168 init_completion(&client->comp);
1169}
1170EXPORT_SYMBOL(ib_sa_register_client);
1171
1172void ib_sa_unregister_client(struct ib_sa_client *client)
1173{
1174 ib_sa_client_put(client);
1175 wait_for_completion(&client->comp);
1176}
1177EXPORT_SYMBOL(ib_sa_unregister_client);
1178
1179/**
1180 * ib_sa_cancel_query - try to cancel an SA query
1181 * @id:ID of query to cancel
1182 * @query:query pointer to cancel
1183 *
1184 * Try to cancel an SA query. If the id and query don't match up or
1185 * the query has already completed, nothing is done. Otherwise the
1186 * query is canceled and will complete with a status of -EINTR.
1187 */
1188void ib_sa_cancel_query(int id, struct ib_sa_query *query)
1189{
1190 unsigned long flags;
1191 struct ib_mad_agent *agent;
1192 struct ib_mad_send_buf *mad_buf;
1193
1194 spin_lock_irqsave(&idr_lock, flags);
1195 if (idr_find(&query_idr, id) != query) {
1196 spin_unlock_irqrestore(&idr_lock, flags);
1197 return;
1198 }
1199 agent = query->port->agent;
1200 mad_buf = query->mad_buf;
1201 spin_unlock_irqrestore(&idr_lock, flags);
1202
1203 /*
1204 * If the query is still on the netlink request list, schedule
1205 * it to be cancelled by the timeout routine. Otherwise, it has been
1206 * sent to the MAD layer and has to be cancelled from there.
1207 */
1208 if (!ib_nl_cancel_request(query))
1209 ib_cancel_mad(agent, mad_buf);
1210}
1211EXPORT_SYMBOL(ib_sa_cancel_query);
1212
1213static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
1214{
1215 struct ib_sa_device *sa_dev;
1216 struct ib_sa_port *port;
1217 unsigned long flags;
1218 u8 src_path_mask;
1219
1220 sa_dev = ib_get_client_data(device, &sa_client);
1221 if (!sa_dev)
1222 return 0x7f;
1223
1224 port = &sa_dev->port[port_num - sa_dev->start_port];
1225 spin_lock_irqsave(&port->ah_lock, flags);
1226 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
1227 spin_unlock_irqrestore(&port->ah_lock, flags);
1228
1229 return src_path_mask;
1230}
1231
1232int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
1233 struct sa_path_rec *rec,
1234 struct rdma_ah_attr *ah_attr)
1235{
1236 int ret;
1237 u16 gid_index;
1238 int use_roce;
1239 struct net_device *ndev = NULL;
1240
1241 memset(ah_attr, 0, sizeof *ah_attr);
1242 ah_attr->type = rdma_ah_find_type(device, port_num);
1243
1244 rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec)));
1245 rdma_ah_set_sl(ah_attr, rec->sl);
1246 rdma_ah_set_path_bits(ah_attr, be32_to_cpu(sa_path_get_slid(rec)) &
1247 get_src_path_mask(device, port_num));
1248 rdma_ah_set_port_num(ah_attr, port_num);
1249 rdma_ah_set_static_rate(ah_attr, rec->rate);
1250 use_roce = rdma_cap_eth_ah(device, port_num);
1251
1252 if (use_roce) {
1253 struct net_device *idev;
1254 struct net_device *resolved_dev;
1255 struct rdma_dev_addr dev_addr = {
1256 .bound_dev_if = ((sa_path_get_ifindex(rec) >= 0) ?
1257 sa_path_get_ifindex(rec) : 0),
1258 .net = sa_path_get_ndev(rec) ?
1259 sa_path_get_ndev(rec) :
1260 &init_net
1261 };
1262 union {
1263 struct sockaddr _sockaddr;
1264 struct sockaddr_in _sockaddr_in;
1265 struct sockaddr_in6 _sockaddr_in6;
1266 } sgid_addr, dgid_addr;
1267
1268 if (!device->get_netdev)
1269 return -EOPNOTSUPP;
1270
1271 rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid);
1272 rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid);
1273
1274 /* validate the route */
1275 ret = rdma_resolve_ip_route(&sgid_addr._sockaddr,
1276 &dgid_addr._sockaddr, &dev_addr);
1277 if (ret)
1278 return ret;
1279
1280 if ((dev_addr.network == RDMA_NETWORK_IPV4 ||
1281 dev_addr.network == RDMA_NETWORK_IPV6) &&
1282 rec->rec_type != SA_PATH_REC_TYPE_ROCE_V2)
1283 return -EINVAL;
1284
1285 idev = device->get_netdev(device, port_num);
1286 if (!idev)
1287 return -ENODEV;
1288
1289 resolved_dev = dev_get_by_index(dev_addr.net,
1290 dev_addr.bound_dev_if);
1291 if (resolved_dev->flags & IFF_LOOPBACK) {
1292 dev_put(resolved_dev);
1293 resolved_dev = idev;
1294 dev_hold(resolved_dev);
1295 }
1296 ndev = ib_get_ndev_from_path(rec);
1297 rcu_read_lock();
1298 if ((ndev && ndev != resolved_dev) ||
1299 (resolved_dev != idev &&
1300 !rdma_is_upper_dev_rcu(idev, resolved_dev)))
1301 ret = -EHOSTUNREACH;
1302 rcu_read_unlock();
1303 dev_put(idev);
1304 dev_put(resolved_dev);
1305 if (ret) {
1306 if (ndev)
1307 dev_put(ndev);
1308 return ret;
1309 }
1310 }
1311
1312 if (rec->hop_limit > 0 || use_roce) {
1313 enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec);
1314
1315 ret = ib_find_cached_gid_by_port(device, &rec->sgid, type,
1316 port_num, ndev, &gid_index);
1317 if (ret) {
1318 if (ndev)
1319 dev_put(ndev);
1320 return ret;
1321 }
1322
1323 rdma_ah_set_grh(ah_attr, &rec->dgid,
1324 be32_to_cpu(rec->flow_label),
1325 gid_index, rec->hop_limit,
1326 rec->traffic_class);
1327 if (ndev)
1328 dev_put(ndev);
1329 }
1330
1331 if (use_roce) {
1332 u8 *dmac = sa_path_get_dmac(rec);
1333
1334 if (!dmac)
1335 return -EINVAL;
1336 memcpy(ah_attr->roce.dmac, dmac, ETH_ALEN);
1337 }
1338
1339 return 0;
1340}
1341EXPORT_SYMBOL(ib_init_ah_from_path);
1342
1343static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1344{
1345 unsigned long flags;
1346
1347 spin_lock_irqsave(&query->port->ah_lock, flags);
1348 if (!query->port->sm_ah) {
1349 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1350 return -EAGAIN;
1351 }
1352 kref_get(&query->port->sm_ah->ref);
1353 query->sm_ah = query->port->sm_ah;
1354 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1355
1356 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1357 query->sm_ah->pkey_index,
1358 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
1359 gfp_mask,
1360 ((query->flags & IB_SA_QUERY_OPA) ?
1361 OPA_MGMT_BASE_VERSION :
1362 IB_MGMT_BASE_VERSION));
1363 if (IS_ERR(query->mad_buf)) {
1364 kref_put(&query->sm_ah->ref, free_sm_ah);
1365 return -ENOMEM;
1366 }
1367
1368 query->mad_buf->ah = query->sm_ah->ah;
1369
1370 return 0;
1371}
1372
1373static void free_mad(struct ib_sa_query *query)
1374{
1375 ib_free_send_mad(query->mad_buf);
1376 kref_put(&query->sm_ah->ref, free_sm_ah);
1377}
1378
1379static void init_mad(struct ib_sa_query *query, struct ib_mad_agent *agent)
1380{
1381 struct ib_sa_mad *mad = query->mad_buf->mad;
1382 unsigned long flags;
1383
1384 memset(mad, 0, sizeof *mad);
1385
1386 if (query->flags & IB_SA_QUERY_OPA) {
1387 mad->mad_hdr.base_version = OPA_MGMT_BASE_VERSION;
1388 mad->mad_hdr.class_version = OPA_SA_CLASS_VERSION;
1389 } else {
1390 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
1391 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1392 }
1393 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
1394 spin_lock_irqsave(&tid_lock, flags);
1395 mad->mad_hdr.tid =
1396 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1397 spin_unlock_irqrestore(&tid_lock, flags);
1398}
1399
1400static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
1401{
1402 bool preload = gfpflags_allow_blocking(gfp_mask);
1403 unsigned long flags;
1404 int ret, id;
1405
1406 if (preload)
1407 idr_preload(gfp_mask);
1408 spin_lock_irqsave(&idr_lock, flags);
1409
1410 id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
1411
1412 spin_unlock_irqrestore(&idr_lock, flags);
1413 if (preload)
1414 idr_preload_end();
1415 if (id < 0)
1416 return id;
1417
1418 query->mad_buf->timeout_ms = timeout_ms;
1419 query->mad_buf->context[0] = query;
1420 query->id = id;
1421
1422 if ((query->flags & IB_SA_ENABLE_LOCAL_SERVICE) &&
1423 (!(query->flags & IB_SA_QUERY_OPA))) {
1424 if (!ibnl_chk_listeners(RDMA_NL_GROUP_LS)) {
1425 if (!ib_nl_make_request(query, gfp_mask))
1426 return id;
1427 }
1428 ib_sa_disable_local_svc(query);
1429 }
1430
1431 ret = ib_post_send_mad(query->mad_buf, NULL);
1432 if (ret) {
1433 spin_lock_irqsave(&idr_lock, flags);
1434 idr_remove(&query_idr, id);
1435 spin_unlock_irqrestore(&idr_lock, flags);
1436 }
1437
1438 /*
1439 * It's not safe to dereference query any more, because the
1440 * send may already have completed and freed the query in
1441 * another context.
1442 */
1443 return ret ? ret : id;
1444}
1445
1446void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec)
1447{
1448 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1449}
1450EXPORT_SYMBOL(ib_sa_unpack_path);
1451
1452void ib_sa_pack_path(struct sa_path_rec *rec, void *attribute)
1453{
1454 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1455}
1456EXPORT_SYMBOL(ib_sa_pack_path);
1457
1458static bool ib_sa_opa_pathrecord_support(struct ib_sa_client *client,
1459 struct ib_device *device,
1460 u8 port_num)
1461{
1462 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1463 struct ib_sa_port *port;
1464 unsigned long flags;
1465 bool ret = false;
1466
1467 if (!sa_dev)
1468 return ret;
1469
1470 port = &sa_dev->port[port_num - sa_dev->start_port];
1471 spin_lock_irqsave(&port->classport_lock, flags);
1472 if (!port->classport_info.valid)
1473 goto ret;
1474
1475 if (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_OPA)
1476 ret = opa_get_cpi_capmask2(&port->classport_info.data.opa) &
1477 OPA_CLASS_PORT_INFO_PR_SUPPORT;
1478ret:
1479 spin_unlock_irqrestore(&port->classport_lock, flags);
1480 return ret;
1481}
1482
1483enum opa_pr_supported {
1484 PR_NOT_SUPPORTED,
1485 PR_OPA_SUPPORTED,
1486 PR_IB_SUPPORTED
1487};
1488
1489/**
1490 * Check if current PR query can be an OPA query.
1491 * Retuns PR_NOT_SUPPORTED if a path record query is not
1492 * possible, PR_OPA_SUPPORTED if an OPA path record query
1493 * is possible and PR_IB_SUPPORTED if an IB path record
1494 * query is possible.
1495 */
1496static int opa_pr_query_possible(struct ib_sa_client *client,
1497 struct ib_device *device,
1498 u8 port_num,
1499 struct sa_path_rec *rec)
1500{
1501 struct ib_port_attr port_attr;
1502
1503 if (ib_query_port(device, port_num, &port_attr))
1504 return PR_NOT_SUPPORTED;
1505
1506 if (ib_sa_opa_pathrecord_support(client, device, port_num))
1507 return PR_OPA_SUPPORTED;
1508
1509 if (port_attr.lid >= be16_to_cpu(IB_MULTICAST_LID_BASE))
1510 return PR_NOT_SUPPORTED;
1511 else
1512 return PR_IB_SUPPORTED;
1513}
1514
1515static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1516 int status,
1517 struct ib_sa_mad *mad)
1518{
1519 struct ib_sa_path_query *query =
1520 container_of(sa_query, struct ib_sa_path_query, sa_query);
1521
1522 if (mad) {
1523 struct sa_path_rec rec;
1524
1525 if (sa_query->flags & IB_SA_QUERY_OPA) {
1526 ib_unpack(opa_path_rec_table,
1527 ARRAY_SIZE(opa_path_rec_table),
1528 mad->data, &rec);
1529 rec.rec_type = SA_PATH_REC_TYPE_OPA;
1530 query->callback(status, &rec, query->context);
1531 } else {
1532 ib_unpack(path_rec_table,
1533 ARRAY_SIZE(path_rec_table),
1534 mad->data, &rec);
1535 rec.rec_type = SA_PATH_REC_TYPE_IB;
1536 sa_path_set_ndev(&rec, NULL);
1537 sa_path_set_ifindex(&rec, 0);
1538 sa_path_set_dmac_zero(&rec);
1539
1540 if (query->conv_pr) {
1541 struct sa_path_rec opa;
1542
1543 memset(&opa, 0, sizeof(struct sa_path_rec));
1544 sa_convert_path_ib_to_opa(&opa, &rec);
1545 query->callback(status, &opa, query->context);
1546 } else {
1547 query->callback(status, &rec, query->context);
1548 }
1549 }
1550 } else
1551 query->callback(status, NULL, query->context);
1552}
1553
1554static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1555{
1556 struct ib_sa_path_query *query =
1557 container_of(sa_query, struct ib_sa_path_query, sa_query);
1558
1559 kfree(query->conv_pr);
1560 kfree(query);
1561}
1562
1563/**
1564 * ib_sa_path_rec_get - Start a Path get query
1565 * @client:SA client
1566 * @device:device to send query on
1567 * @port_num: port number to send query on
1568 * @rec:Path Record to send in query
1569 * @comp_mask:component mask to send in query
1570 * @timeout_ms:time to wait for response
1571 * @gfp_mask:GFP mask to use for internal allocations
1572 * @callback:function called when query completes, times out or is
1573 * canceled
1574 * @context:opaque user context passed to callback
1575 * @sa_query:query context, used to cancel query
1576 *
1577 * Send a Path Record Get query to the SA to look up a path. The
1578 * callback function will be called when the query completes (or
1579 * fails); status is 0 for a successful response, -EINTR if the query
1580 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1581 * occurred sending the query. The resp parameter of the callback is
1582 * only valid if status is 0.
1583 *
1584 * If the return value of ib_sa_path_rec_get() is negative, it is an
1585 * error code. Otherwise it is a query ID that can be used to cancel
1586 * the query.
1587 */
1588int ib_sa_path_rec_get(struct ib_sa_client *client,
1589 struct ib_device *device, u8 port_num,
1590 struct sa_path_rec *rec,
1591 ib_sa_comp_mask comp_mask,
1592 int timeout_ms, gfp_t gfp_mask,
1593 void (*callback)(int status,
1594 struct sa_path_rec *resp,
1595 void *context),
1596 void *context,
1597 struct ib_sa_query **sa_query)
1598{
1599 struct ib_sa_path_query *query;
1600 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1601 struct ib_sa_port *port;
1602 struct ib_mad_agent *agent;
1603 struct ib_sa_mad *mad;
1604 enum opa_pr_supported status;
1605 int ret;
1606
1607 if (!sa_dev)
1608 return -ENODEV;
1609
1610 if ((rec->rec_type != SA_PATH_REC_TYPE_IB) &&
1611 (rec->rec_type != SA_PATH_REC_TYPE_OPA))
1612 return -EINVAL;
1613
1614 port = &sa_dev->port[port_num - sa_dev->start_port];
1615 agent = port->agent;
1616
1617 query = kzalloc(sizeof(*query), gfp_mask);
1618 if (!query)
1619 return -ENOMEM;
1620
1621 query->sa_query.port = port;
1622 if (rec->rec_type == SA_PATH_REC_TYPE_OPA) {
1623 status = opa_pr_query_possible(client, device, port_num, rec);
1624 if (status == PR_NOT_SUPPORTED) {
1625 ret = -EINVAL;
1626 goto err1;
1627 } else if (status == PR_OPA_SUPPORTED) {
1628 query->sa_query.flags |= IB_SA_QUERY_OPA;
1629 } else {
1630 query->conv_pr =
1631 kmalloc(sizeof(*query->conv_pr), gfp_mask);
1632 if (!query->conv_pr) {
1633 ret = -ENOMEM;
1634 goto err1;
1635 }
1636 }
1637 }
1638
1639 ret = alloc_mad(&query->sa_query, gfp_mask);
1640 if (ret)
1641 goto err2;
1642
1643 ib_sa_client_get(client);
1644 query->sa_query.client = client;
1645 query->callback = callback;
1646 query->context = context;
1647
1648 mad = query->sa_query.mad_buf->mad;
1649 init_mad(&query->sa_query, agent);
1650
1651 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1652 query->sa_query.release = ib_sa_path_rec_release;
1653 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1654 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1655 mad->sa_hdr.comp_mask = comp_mask;
1656
1657 if (query->sa_query.flags & IB_SA_QUERY_OPA) {
1658 ib_pack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table),
1659 rec, mad->data);
1660 } else if (query->conv_pr) {
1661 sa_convert_path_opa_to_ib(query->conv_pr, rec);
1662 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1663 query->conv_pr, mad->data);
1664 } else {
1665 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1666 rec, mad->data);
1667 }
1668
1669 *sa_query = &query->sa_query;
1670
1671 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1672 query->sa_query.mad_buf->context[1] = (query->conv_pr) ?
1673 query->conv_pr : rec;
1674
1675 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1676 if (ret < 0)
1677 goto err3;
1678
1679 return ret;
1680
1681err3:
1682 *sa_query = NULL;
1683 ib_sa_client_put(query->sa_query.client);
1684 free_mad(&query->sa_query);
1685err2:
1686 kfree(query->conv_pr);
1687err1:
1688 kfree(query);
1689 return ret;
1690}
1691EXPORT_SYMBOL(ib_sa_path_rec_get);
1692
1693static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1694 int status,
1695 struct ib_sa_mad *mad)
1696{
1697 struct ib_sa_service_query *query =
1698 container_of(sa_query, struct ib_sa_service_query, sa_query);
1699
1700 if (mad) {
1701 struct ib_sa_service_rec rec;
1702
1703 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1704 mad->data, &rec);
1705 query->callback(status, &rec, query->context);
1706 } else
1707 query->callback(status, NULL, query->context);
1708}
1709
1710static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1711{
1712 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1713}
1714
1715/**
1716 * ib_sa_service_rec_query - Start Service Record operation
1717 * @client:SA client
1718 * @device:device to send request on
1719 * @port_num: port number to send request on
1720 * @method:SA method - should be get, set, or delete
1721 * @rec:Service Record to send in request
1722 * @comp_mask:component mask to send in request
1723 * @timeout_ms:time to wait for response
1724 * @gfp_mask:GFP mask to use for internal allocations
1725 * @callback:function called when request completes, times out or is
1726 * canceled
1727 * @context:opaque user context passed to callback
1728 * @sa_query:request context, used to cancel request
1729 *
1730 * Send a Service Record set/get/delete to the SA to register,
1731 * unregister or query a service record.
1732 * The callback function will be called when the request completes (or
1733 * fails); status is 0 for a successful response, -EINTR if the query
1734 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1735 * occurred sending the query. The resp parameter of the callback is
1736 * only valid if status is 0.
1737 *
1738 * If the return value of ib_sa_service_rec_query() is negative, it is an
1739 * error code. Otherwise it is a request ID that can be used to cancel
1740 * the query.
1741 */
1742int ib_sa_service_rec_query(struct ib_sa_client *client,
1743 struct ib_device *device, u8 port_num, u8 method,
1744 struct ib_sa_service_rec *rec,
1745 ib_sa_comp_mask comp_mask,
1746 int timeout_ms, gfp_t gfp_mask,
1747 void (*callback)(int status,
1748 struct ib_sa_service_rec *resp,
1749 void *context),
1750 void *context,
1751 struct ib_sa_query **sa_query)
1752{
1753 struct ib_sa_service_query *query;
1754 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1755 struct ib_sa_port *port;
1756 struct ib_mad_agent *agent;
1757 struct ib_sa_mad *mad;
1758 int ret;
1759
1760 if (!sa_dev)
1761 return -ENODEV;
1762
1763 port = &sa_dev->port[port_num - sa_dev->start_port];
1764 agent = port->agent;
1765
1766 if (method != IB_MGMT_METHOD_GET &&
1767 method != IB_MGMT_METHOD_SET &&
1768 method != IB_SA_METHOD_DELETE)
1769 return -EINVAL;
1770
1771 query = kzalloc(sizeof(*query), gfp_mask);
1772 if (!query)
1773 return -ENOMEM;
1774
1775 query->sa_query.port = port;
1776 ret = alloc_mad(&query->sa_query, gfp_mask);
1777 if (ret)
1778 goto err1;
1779
1780 ib_sa_client_get(client);
1781 query->sa_query.client = client;
1782 query->callback = callback;
1783 query->context = context;
1784
1785 mad = query->sa_query.mad_buf->mad;
1786 init_mad(&query->sa_query, agent);
1787
1788 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1789 query->sa_query.release = ib_sa_service_rec_release;
1790 mad->mad_hdr.method = method;
1791 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1792 mad->sa_hdr.comp_mask = comp_mask;
1793
1794 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
1795 rec, mad->data);
1796
1797 *sa_query = &query->sa_query;
1798
1799 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1800 if (ret < 0)
1801 goto err2;
1802
1803 return ret;
1804
1805err2:
1806 *sa_query = NULL;
1807 ib_sa_client_put(query->sa_query.client);
1808 free_mad(&query->sa_query);
1809
1810err1:
1811 kfree(query);
1812 return ret;
1813}
1814EXPORT_SYMBOL(ib_sa_service_rec_query);
1815
1816static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1817 int status,
1818 struct ib_sa_mad *mad)
1819{
1820 struct ib_sa_mcmember_query *query =
1821 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1822
1823 if (mad) {
1824 struct ib_sa_mcmember_rec rec;
1825
1826 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1827 mad->data, &rec);
1828 query->callback(status, &rec, query->context);
1829 } else
1830 query->callback(status, NULL, query->context);
1831}
1832
1833static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1834{
1835 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1836}
1837
1838int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1839 struct ib_device *device, u8 port_num,
1840 u8 method,
1841 struct ib_sa_mcmember_rec *rec,
1842 ib_sa_comp_mask comp_mask,
1843 int timeout_ms, gfp_t gfp_mask,
1844 void (*callback)(int status,
1845 struct ib_sa_mcmember_rec *resp,
1846 void *context),
1847 void *context,
1848 struct ib_sa_query **sa_query)
1849{
1850 struct ib_sa_mcmember_query *query;
1851 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1852 struct ib_sa_port *port;
1853 struct ib_mad_agent *agent;
1854 struct ib_sa_mad *mad;
1855 int ret;
1856
1857 if (!sa_dev)
1858 return -ENODEV;
1859
1860 port = &sa_dev->port[port_num - sa_dev->start_port];
1861 agent = port->agent;
1862
1863 query = kzalloc(sizeof(*query), gfp_mask);
1864 if (!query)
1865 return -ENOMEM;
1866
1867 query->sa_query.port = port;
1868 ret = alloc_mad(&query->sa_query, gfp_mask);
1869 if (ret)
1870 goto err1;
1871
1872 ib_sa_client_get(client);
1873 query->sa_query.client = client;
1874 query->callback = callback;
1875 query->context = context;
1876
1877 mad = query->sa_query.mad_buf->mad;
1878 init_mad(&query->sa_query, agent);
1879
1880 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1881 query->sa_query.release = ib_sa_mcmember_rec_release;
1882 mad->mad_hdr.method = method;
1883 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1884 mad->sa_hdr.comp_mask = comp_mask;
1885
1886 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1887 rec, mad->data);
1888
1889 *sa_query = &query->sa_query;
1890
1891 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1892 if (ret < 0)
1893 goto err2;
1894
1895 return ret;
1896
1897err2:
1898 *sa_query = NULL;
1899 ib_sa_client_put(query->sa_query.client);
1900 free_mad(&query->sa_query);
1901
1902err1:
1903 kfree(query);
1904 return ret;
1905}
1906
1907/* Support GuidInfoRecord */
1908static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1909 int status,
1910 struct ib_sa_mad *mad)
1911{
1912 struct ib_sa_guidinfo_query *query =
1913 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1914
1915 if (mad) {
1916 struct ib_sa_guidinfo_rec rec;
1917
1918 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1919 mad->data, &rec);
1920 query->callback(status, &rec, query->context);
1921 } else
1922 query->callback(status, NULL, query->context);
1923}
1924
1925static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1926{
1927 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1928}
1929
1930int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1931 struct ib_device *device, u8 port_num,
1932 struct ib_sa_guidinfo_rec *rec,
1933 ib_sa_comp_mask comp_mask, u8 method,
1934 int timeout_ms, gfp_t gfp_mask,
1935 void (*callback)(int status,
1936 struct ib_sa_guidinfo_rec *resp,
1937 void *context),
1938 void *context,
1939 struct ib_sa_query **sa_query)
1940{
1941 struct ib_sa_guidinfo_query *query;
1942 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1943 struct ib_sa_port *port;
1944 struct ib_mad_agent *agent;
1945 struct ib_sa_mad *mad;
1946 int ret;
1947
1948 if (!sa_dev)
1949 return -ENODEV;
1950
1951 if (method != IB_MGMT_METHOD_GET &&
1952 method != IB_MGMT_METHOD_SET &&
1953 method != IB_SA_METHOD_DELETE) {
1954 return -EINVAL;
1955 }
1956
1957 port = &sa_dev->port[port_num - sa_dev->start_port];
1958 agent = port->agent;
1959
1960 query = kzalloc(sizeof(*query), gfp_mask);
1961 if (!query)
1962 return -ENOMEM;
1963
1964 query->sa_query.port = port;
1965 ret = alloc_mad(&query->sa_query, gfp_mask);
1966 if (ret)
1967 goto err1;
1968
1969 ib_sa_client_get(client);
1970 query->sa_query.client = client;
1971 query->callback = callback;
1972 query->context = context;
1973
1974 mad = query->sa_query.mad_buf->mad;
1975 init_mad(&query->sa_query, agent);
1976
1977 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1978 query->sa_query.release = ib_sa_guidinfo_rec_release;
1979
1980 mad->mad_hdr.method = method;
1981 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1982 mad->sa_hdr.comp_mask = comp_mask;
1983
1984 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1985 mad->data);
1986
1987 *sa_query = &query->sa_query;
1988
1989 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1990 if (ret < 0)
1991 goto err2;
1992
1993 return ret;
1994
1995err2:
1996 *sa_query = NULL;
1997 ib_sa_client_put(query->sa_query.client);
1998 free_mad(&query->sa_query);
1999
2000err1:
2001 kfree(query);
2002 return ret;
2003}
2004EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
2005
2006bool ib_sa_sendonly_fullmem_support(struct ib_sa_client *client,
2007 struct ib_device *device,
2008 u8 port_num)
2009{
2010 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
2011 struct ib_sa_port *port;
2012 bool ret = false;
2013 unsigned long flags;
2014
2015 if (!sa_dev)
2016 return ret;
2017
2018 port = &sa_dev->port[port_num - sa_dev->start_port];
2019
2020 spin_lock_irqsave(&port->classport_lock, flags);
2021 if ((port->classport_info.valid) &&
2022 (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_IB))
2023 ret = ib_get_cpi_capmask2(&port->classport_info.data.ib)
2024 & IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT;
2025 spin_unlock_irqrestore(&port->classport_lock, flags);
2026 return ret;
2027}
2028EXPORT_SYMBOL(ib_sa_sendonly_fullmem_support);
2029
2030struct ib_classport_info_context {
2031 struct completion done;
2032 struct ib_sa_query *sa_query;
2033};
2034
2035static void ib_classportinfo_cb(void *context)
2036{
2037 struct ib_classport_info_context *cb_ctx = context;
2038
2039 complete(&cb_ctx->done);
2040}
2041
2042static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
2043 int status,
2044 struct ib_sa_mad *mad)
2045{
2046 unsigned long flags;
2047 struct ib_sa_classport_info_query *query =
2048 container_of(sa_query, struct ib_sa_classport_info_query, sa_query);
2049 struct ib_sa_classport_cache *info = &sa_query->port->classport_info;
2050
2051 if (mad) {
2052 if (sa_query->flags & IB_SA_QUERY_OPA) {
2053 struct opa_class_port_info rec;
2054
2055 ib_unpack(opa_classport_info_rec_table,
2056 ARRAY_SIZE(opa_classport_info_rec_table),
2057 mad->data, &rec);
2058
2059 spin_lock_irqsave(&sa_query->port->classport_lock,
2060 flags);
2061 if (!status && !info->valid) {
2062 memcpy(&info->data.opa, &rec,
2063 sizeof(info->data.opa));
2064
2065 info->valid = true;
2066 info->data.type = RDMA_CLASS_PORT_INFO_OPA;
2067 }
2068 spin_unlock_irqrestore(&sa_query->port->classport_lock,
2069 flags);
2070
2071 } else {
2072 struct ib_class_port_info rec;
2073
2074 ib_unpack(ib_classport_info_rec_table,
2075 ARRAY_SIZE(ib_classport_info_rec_table),
2076 mad->data, &rec);
2077
2078 spin_lock_irqsave(&sa_query->port->classport_lock,
2079 flags);
2080 if (!status && !info->valid) {
2081 memcpy(&info->data.ib, &rec,
2082 sizeof(info->data.ib));
2083
2084 info->valid = true;
2085 info->data.type = RDMA_CLASS_PORT_INFO_IB;
2086 }
2087 spin_unlock_irqrestore(&sa_query->port->classport_lock,
2088 flags);
2089 }
2090 }
2091 query->callback(query->context);
2092}
2093
2094static void ib_sa_classport_info_rec_release(struct ib_sa_query *sa_query)
2095{
2096 kfree(container_of(sa_query, struct ib_sa_classport_info_query,
2097 sa_query));
2098}
2099
2100static int ib_sa_classport_info_rec_query(struct ib_sa_port *port,
2101 int timeout_ms,
2102 void (*callback)(void *context),
2103 void *context,
2104 struct ib_sa_query **sa_query)
2105{
2106 struct ib_mad_agent *agent;
2107 struct ib_sa_classport_info_query *query;
2108 struct ib_sa_mad *mad;
2109 gfp_t gfp_mask = GFP_KERNEL;
2110 int ret;
2111
2112 agent = port->agent;
2113
2114 query = kzalloc(sizeof(*query), gfp_mask);
2115 if (!query)
2116 return -ENOMEM;
2117
2118 query->sa_query.port = port;
2119 query->sa_query.flags |= rdma_cap_opa_ah(port->agent->device,
2120 port->port_num) ?
2121 IB_SA_QUERY_OPA : 0;
2122 ret = alloc_mad(&query->sa_query, gfp_mask);
2123 if (ret)
2124 goto err_free;
2125
2126 query->callback = callback;
2127 query->context = context;
2128
2129 mad = query->sa_query.mad_buf->mad;
2130 init_mad(&query->sa_query, agent);
2131
2132 query->sa_query.callback = ib_sa_classport_info_rec_callback;
2133 query->sa_query.release = ib_sa_classport_info_rec_release;
2134 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
2135 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO);
2136 mad->sa_hdr.comp_mask = 0;
2137 *sa_query = &query->sa_query;
2138
2139 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
2140 if (ret < 0)
2141 goto err_free_mad;
2142
2143 return ret;
2144
2145err_free_mad:
2146 *sa_query = NULL;
2147 free_mad(&query->sa_query);
2148
2149err_free:
2150 kfree(query);
2151 return ret;
2152}
2153
2154static void update_ib_cpi(struct work_struct *work)
2155{
2156 struct ib_sa_port *port =
2157 container_of(work, struct ib_sa_port, ib_cpi_work.work);
2158 struct ib_classport_info_context *cb_context;
2159 unsigned long flags;
2160 int ret;
2161
2162 /* If the classport info is valid, nothing
2163 * to do here.
2164 */
2165 spin_lock_irqsave(&port->classport_lock, flags);
2166 if (port->classport_info.valid) {
2167 spin_unlock_irqrestore(&port->classport_lock, flags);
2168 return;
2169 }
2170 spin_unlock_irqrestore(&port->classport_lock, flags);
2171
2172 cb_context = kmalloc(sizeof(*cb_context), GFP_KERNEL);
2173 if (!cb_context)
2174 goto err_nomem;
2175
2176 init_completion(&cb_context->done);
2177
2178 ret = ib_sa_classport_info_rec_query(port, 3000,
2179 ib_classportinfo_cb, cb_context,
2180 &cb_context->sa_query);
2181 if (ret < 0)
2182 goto free_cb_err;
2183 wait_for_completion(&cb_context->done);
2184free_cb_err:
2185 kfree(cb_context);
2186 spin_lock_irqsave(&port->classport_lock, flags);
2187
2188 /* If the classport info is still not valid, the query should have
2189 * failed for some reason. Retry issuing the query
2190 */
2191 if (!port->classport_info.valid) {
2192 port->classport_info.retry_cnt++;
2193 if (port->classport_info.retry_cnt <=
2194 IB_SA_CPI_MAX_RETRY_CNT) {
2195 unsigned long delay =
2196 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2197
2198 queue_delayed_work(ib_wq, &port->ib_cpi_work, delay);
2199 }
2200 }
2201 spin_unlock_irqrestore(&port->classport_lock, flags);
2202
2203err_nomem:
2204 return;
2205}
2206
2207static void send_handler(struct ib_mad_agent *agent,
2208 struct ib_mad_send_wc *mad_send_wc)
2209{
2210 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
2211 unsigned long flags;
2212
2213 if (query->callback)
2214 switch (mad_send_wc->status) {
2215 case IB_WC_SUCCESS:
2216 /* No callback -- already got recv */
2217 break;
2218 case IB_WC_RESP_TIMEOUT_ERR:
2219 query->callback(query, -ETIMEDOUT, NULL);
2220 break;
2221 case IB_WC_WR_FLUSH_ERR:
2222 query->callback(query, -EINTR, NULL);
2223 break;
2224 default:
2225 query->callback(query, -EIO, NULL);
2226 break;
2227 }
2228
2229 spin_lock_irqsave(&idr_lock, flags);
2230 idr_remove(&query_idr, query->id);
2231 spin_unlock_irqrestore(&idr_lock, flags);
2232
2233 free_mad(query);
2234 if (query->client)
2235 ib_sa_client_put(query->client);
2236 query->release(query);
2237}
2238
2239static void recv_handler(struct ib_mad_agent *mad_agent,
2240 struct ib_mad_send_buf *send_buf,
2241 struct ib_mad_recv_wc *mad_recv_wc)
2242{
2243 struct ib_sa_query *query;
2244
2245 if (!send_buf)
2246 return;
2247
2248 query = send_buf->context[0];
2249 if (query->callback) {
2250 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
2251 query->callback(query,
2252 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
2253 -EINVAL : 0,
2254 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
2255 else
2256 query->callback(query, -EIO, NULL);
2257 }
2258
2259 ib_free_recv_mad(mad_recv_wc);
2260}
2261
2262static void update_sm_ah(struct work_struct *work)
2263{
2264 struct ib_sa_port *port =
2265 container_of(work, struct ib_sa_port, update_task);
2266 struct ib_sa_sm_ah *new_ah;
2267 struct ib_port_attr port_attr;
2268 struct rdma_ah_attr ah_attr;
2269
2270 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
2271 pr_warn("Couldn't query port\n");
2272 return;
2273 }
2274
2275 new_ah = kmalloc(sizeof(*new_ah), GFP_KERNEL);
2276 if (!new_ah)
2277 return;
2278
2279 kref_init(&new_ah->ref);
2280 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
2281
2282 new_ah->pkey_index = 0;
2283 if (ib_find_pkey(port->agent->device, port->port_num,
2284 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
2285 pr_err("Couldn't find index for default PKey\n");
2286
2287 memset(&ah_attr, 0, sizeof(ah_attr));
2288 ah_attr.type = rdma_ah_find_type(port->agent->device,
2289 port->port_num);
2290 rdma_ah_set_dlid(&ah_attr, port_attr.sm_lid);
2291 rdma_ah_set_sl(&ah_attr, port_attr.sm_sl);
2292 rdma_ah_set_port_num(&ah_attr, port->port_num);
2293 if (port_attr.grh_required) {
2294 rdma_ah_set_ah_flags(&ah_attr, IB_AH_GRH);
2295
2296 rdma_ah_set_subnet_prefix(&ah_attr,
2297 cpu_to_be64(port_attr.subnet_prefix));
2298 rdma_ah_set_interface_id(&ah_attr,
2299 cpu_to_be64(IB_SA_WELL_KNOWN_GUID));
2300 }
2301
2302 new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr);
2303 if (IS_ERR(new_ah->ah)) {
2304 pr_warn("Couldn't create new SM AH\n");
2305 kfree(new_ah);
2306 return;
2307 }
2308
2309 spin_lock_irq(&port->ah_lock);
2310 if (port->sm_ah)
2311 kref_put(&port->sm_ah->ref, free_sm_ah);
2312 port->sm_ah = new_ah;
2313 spin_unlock_irq(&port->ah_lock);
2314}
2315
2316static void ib_sa_event(struct ib_event_handler *handler,
2317 struct ib_event *event)
2318{
2319 if (event->event == IB_EVENT_PORT_ERR ||
2320 event->event == IB_EVENT_PORT_ACTIVE ||
2321 event->event == IB_EVENT_LID_CHANGE ||
2322 event->event == IB_EVENT_PKEY_CHANGE ||
2323 event->event == IB_EVENT_SM_CHANGE ||
2324 event->event == IB_EVENT_CLIENT_REREGISTER) {
2325 unsigned long flags;
2326 struct ib_sa_device *sa_dev =
2327 container_of(handler, typeof(*sa_dev), event_handler);
2328 u8 port_num = event->element.port_num - sa_dev->start_port;
2329 struct ib_sa_port *port = &sa_dev->port[port_num];
2330
2331 if (!rdma_cap_ib_sa(handler->device, port->port_num))
2332 return;
2333
2334 spin_lock_irqsave(&port->ah_lock, flags);
2335 if (port->sm_ah)
2336 kref_put(&port->sm_ah->ref, free_sm_ah);
2337 port->sm_ah = NULL;
2338 spin_unlock_irqrestore(&port->ah_lock, flags);
2339
2340 if (event->event == IB_EVENT_SM_CHANGE ||
2341 event->event == IB_EVENT_CLIENT_REREGISTER ||
2342 event->event == IB_EVENT_LID_CHANGE ||
2343 event->event == IB_EVENT_PORT_ACTIVE) {
2344 unsigned long delay =
2345 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2346
2347 spin_lock_irqsave(&port->classport_lock, flags);
2348 port->classport_info.valid = false;
2349 port->classport_info.retry_cnt = 0;
2350 spin_unlock_irqrestore(&port->classport_lock, flags);
2351 queue_delayed_work(ib_wq,
2352 &port->ib_cpi_work, delay);
2353 }
2354 queue_work(ib_wq, &sa_dev->port[port_num].update_task);
2355 }
2356}
2357
2358static void ib_sa_add_one(struct ib_device *device)
2359{
2360 struct ib_sa_device *sa_dev;
2361 int s, e, i;
2362 int count = 0;
2363
2364 s = rdma_start_port(device);
2365 e = rdma_end_port(device);
2366
2367 sa_dev = kzalloc(sizeof *sa_dev +
2368 (e - s + 1) * sizeof (struct ib_sa_port),
2369 GFP_KERNEL);
2370 if (!sa_dev)
2371 return;
2372
2373 sa_dev->start_port = s;
2374 sa_dev->end_port = e;
2375
2376 for (i = 0; i <= e - s; ++i) {
2377 spin_lock_init(&sa_dev->port[i].ah_lock);
2378 if (!rdma_cap_ib_sa(device, i + 1))
2379 continue;
2380
2381 sa_dev->port[i].sm_ah = NULL;
2382 sa_dev->port[i].port_num = i + s;
2383
2384 spin_lock_init(&sa_dev->port[i].classport_lock);
2385 sa_dev->port[i].classport_info.valid = false;
2386
2387 sa_dev->port[i].agent =
2388 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
2389 NULL, 0, send_handler,
2390 recv_handler, sa_dev, 0);
2391 if (IS_ERR(sa_dev->port[i].agent))
2392 goto err;
2393
2394 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
2395 INIT_DELAYED_WORK(&sa_dev->port[i].ib_cpi_work,
2396 update_ib_cpi);
2397
2398 count++;
2399 }
2400
2401 if (!count)
2402 goto free;
2403
2404 ib_set_client_data(device, &sa_client, sa_dev);
2405
2406 /*
2407 * We register our event handler after everything is set up,
2408 * and then update our cached info after the event handler is
2409 * registered to avoid any problems if a port changes state
2410 * during our initialization.
2411 */
2412
2413 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
2414 if (ib_register_event_handler(&sa_dev->event_handler))
2415 goto err;
2416
2417 for (i = 0; i <= e - s; ++i) {
2418 if (rdma_cap_ib_sa(device, i + 1))
2419 update_sm_ah(&sa_dev->port[i].update_task);
2420 }
2421
2422 return;
2423
2424err:
2425 while (--i >= 0) {
2426 if (rdma_cap_ib_sa(device, i + 1))
2427 ib_unregister_mad_agent(sa_dev->port[i].agent);
2428 }
2429free:
2430 kfree(sa_dev);
2431 return;
2432}
2433
2434static void ib_sa_remove_one(struct ib_device *device, void *client_data)
2435{
2436 struct ib_sa_device *sa_dev = client_data;
2437 int i;
2438
2439 if (!sa_dev)
2440 return;
2441
2442 ib_unregister_event_handler(&sa_dev->event_handler);
2443 flush_workqueue(ib_wq);
2444
2445 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
2446 if (rdma_cap_ib_sa(device, i + 1)) {
2447 cancel_delayed_work_sync(&sa_dev->port[i].ib_cpi_work);
2448 ib_unregister_mad_agent(sa_dev->port[i].agent);
2449 if (sa_dev->port[i].sm_ah)
2450 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
2451 }
2452
2453 }
2454
2455 kfree(sa_dev);
2456}
2457
2458int ib_sa_init(void)
2459{
2460 int ret;
2461
2462 get_random_bytes(&tid, sizeof tid);
2463
2464 atomic_set(&ib_nl_sa_request_seq, 0);
2465
2466 ret = ib_register_client(&sa_client);
2467 if (ret) {
2468 pr_err("Couldn't register ib_sa client\n");
2469 goto err1;
2470 }
2471
2472 ret = mcast_init();
2473 if (ret) {
2474 pr_err("Couldn't initialize multicast handling\n");
2475 goto err2;
2476 }
2477
2478 ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM);
2479 if (!ib_nl_wq) {
2480 ret = -ENOMEM;
2481 goto err3;
2482 }
2483
2484 INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
2485
2486 return 0;
2487
2488err3:
2489 mcast_cleanup();
2490err2:
2491 ib_unregister_client(&sa_client);
2492err1:
2493 return ret;
2494}
2495
2496void ib_sa_cleanup(void)
2497{
2498 cancel_delayed_work(&ib_nl_timed_work);
2499 flush_workqueue(ib_nl_wq);
2500 destroy_workqueue(ib_nl_wq);
2501 mcast_cleanup();
2502 ib_unregister_client(&sa_client);
2503 idr_destroy(&query_idr);
2504}