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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
46#include <rdma/ib_pack.h>
47#include <rdma/ib_cache.h>
48#include "sa.h"
49
50MODULE_AUTHOR("Roland Dreier");
51MODULE_DESCRIPTION("InfiniBand subnet administration query support");
52MODULE_LICENSE("Dual BSD/GPL");
53
54struct ib_sa_sm_ah {
55 struct ib_ah *ah;
56 struct kref ref;
57 u16 pkey_index;
58 u8 src_path_mask;
59};
60
61struct ib_sa_port {
62 struct ib_mad_agent *agent;
63 struct ib_sa_sm_ah *sm_ah;
64 struct work_struct update_task;
65 spinlock_t ah_lock;
66 u8 port_num;
67};
68
69struct ib_sa_device {
70 int start_port, end_port;
71 struct ib_event_handler event_handler;
72 struct ib_sa_port port[0];
73};
74
75struct ib_sa_query {
76 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
77 void (*release)(struct ib_sa_query *);
78 struct ib_sa_client *client;
79 struct ib_sa_port *port;
80 struct ib_mad_send_buf *mad_buf;
81 struct ib_sa_sm_ah *sm_ah;
82 int id;
83};
84
85struct ib_sa_service_query {
86 void (*callback)(int, struct ib_sa_service_rec *, void *);
87 void *context;
88 struct ib_sa_query sa_query;
89};
90
91struct ib_sa_path_query {
92 void (*callback)(int, struct ib_sa_path_rec *, void *);
93 void *context;
94 struct ib_sa_query sa_query;
95};
96
97struct ib_sa_mcmember_query {
98 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
99 void *context;
100 struct ib_sa_query sa_query;
101};
102
103static void ib_sa_add_one(struct ib_device *device);
104static void ib_sa_remove_one(struct ib_device *device);
105
106static struct ib_client sa_client = {
107 .name = "sa",
108 .add = ib_sa_add_one,
109 .remove = ib_sa_remove_one
110};
111
112static DEFINE_SPINLOCK(idr_lock);
113static DEFINE_IDR(query_idr);
114
115static DEFINE_SPINLOCK(tid_lock);
116static u32 tid;
117
118#define PATH_REC_FIELD(field) \
119 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
120 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
121 .field_name = "sa_path_rec:" #field
122
123static const struct ib_field path_rec_table[] = {
124 { PATH_REC_FIELD(service_id),
125 .offset_words = 0,
126 .offset_bits = 0,
127 .size_bits = 64 },
128 { PATH_REC_FIELD(dgid),
129 .offset_words = 2,
130 .offset_bits = 0,
131 .size_bits = 128 },
132 { PATH_REC_FIELD(sgid),
133 .offset_words = 6,
134 .offset_bits = 0,
135 .size_bits = 128 },
136 { PATH_REC_FIELD(dlid),
137 .offset_words = 10,
138 .offset_bits = 0,
139 .size_bits = 16 },
140 { PATH_REC_FIELD(slid),
141 .offset_words = 10,
142 .offset_bits = 16,
143 .size_bits = 16 },
144 { PATH_REC_FIELD(raw_traffic),
145 .offset_words = 11,
146 .offset_bits = 0,
147 .size_bits = 1 },
148 { RESERVED,
149 .offset_words = 11,
150 .offset_bits = 1,
151 .size_bits = 3 },
152 { PATH_REC_FIELD(flow_label),
153 .offset_words = 11,
154 .offset_bits = 4,
155 .size_bits = 20 },
156 { PATH_REC_FIELD(hop_limit),
157 .offset_words = 11,
158 .offset_bits = 24,
159 .size_bits = 8 },
160 { PATH_REC_FIELD(traffic_class),
161 .offset_words = 12,
162 .offset_bits = 0,
163 .size_bits = 8 },
164 { PATH_REC_FIELD(reversible),
165 .offset_words = 12,
166 .offset_bits = 8,
167 .size_bits = 1 },
168 { PATH_REC_FIELD(numb_path),
169 .offset_words = 12,
170 .offset_bits = 9,
171 .size_bits = 7 },
172 { PATH_REC_FIELD(pkey),
173 .offset_words = 12,
174 .offset_bits = 16,
175 .size_bits = 16 },
176 { PATH_REC_FIELD(qos_class),
177 .offset_words = 13,
178 .offset_bits = 0,
179 .size_bits = 12 },
180 { PATH_REC_FIELD(sl),
181 .offset_words = 13,
182 .offset_bits = 12,
183 .size_bits = 4 },
184 { PATH_REC_FIELD(mtu_selector),
185 .offset_words = 13,
186 .offset_bits = 16,
187 .size_bits = 2 },
188 { PATH_REC_FIELD(mtu),
189 .offset_words = 13,
190 .offset_bits = 18,
191 .size_bits = 6 },
192 { PATH_REC_FIELD(rate_selector),
193 .offset_words = 13,
194 .offset_bits = 24,
195 .size_bits = 2 },
196 { PATH_REC_FIELD(rate),
197 .offset_words = 13,
198 .offset_bits = 26,
199 .size_bits = 6 },
200 { PATH_REC_FIELD(packet_life_time_selector),
201 .offset_words = 14,
202 .offset_bits = 0,
203 .size_bits = 2 },
204 { PATH_REC_FIELD(packet_life_time),
205 .offset_words = 14,
206 .offset_bits = 2,
207 .size_bits = 6 },
208 { PATH_REC_FIELD(preference),
209 .offset_words = 14,
210 .offset_bits = 8,
211 .size_bits = 8 },
212 { RESERVED,
213 .offset_words = 14,
214 .offset_bits = 16,
215 .size_bits = 48 },
216};
217
218#define MCMEMBER_REC_FIELD(field) \
219 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
220 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
221 .field_name = "sa_mcmember_rec:" #field
222
223static const struct ib_field mcmember_rec_table[] = {
224 { MCMEMBER_REC_FIELD(mgid),
225 .offset_words = 0,
226 .offset_bits = 0,
227 .size_bits = 128 },
228 { MCMEMBER_REC_FIELD(port_gid),
229 .offset_words = 4,
230 .offset_bits = 0,
231 .size_bits = 128 },
232 { MCMEMBER_REC_FIELD(qkey),
233 .offset_words = 8,
234 .offset_bits = 0,
235 .size_bits = 32 },
236 { MCMEMBER_REC_FIELD(mlid),
237 .offset_words = 9,
238 .offset_bits = 0,
239 .size_bits = 16 },
240 { MCMEMBER_REC_FIELD(mtu_selector),
241 .offset_words = 9,
242 .offset_bits = 16,
243 .size_bits = 2 },
244 { MCMEMBER_REC_FIELD(mtu),
245 .offset_words = 9,
246 .offset_bits = 18,
247 .size_bits = 6 },
248 { MCMEMBER_REC_FIELD(traffic_class),
249 .offset_words = 9,
250 .offset_bits = 24,
251 .size_bits = 8 },
252 { MCMEMBER_REC_FIELD(pkey),
253 .offset_words = 10,
254 .offset_bits = 0,
255 .size_bits = 16 },
256 { MCMEMBER_REC_FIELD(rate_selector),
257 .offset_words = 10,
258 .offset_bits = 16,
259 .size_bits = 2 },
260 { MCMEMBER_REC_FIELD(rate),
261 .offset_words = 10,
262 .offset_bits = 18,
263 .size_bits = 6 },
264 { MCMEMBER_REC_FIELD(packet_life_time_selector),
265 .offset_words = 10,
266 .offset_bits = 24,
267 .size_bits = 2 },
268 { MCMEMBER_REC_FIELD(packet_life_time),
269 .offset_words = 10,
270 .offset_bits = 26,
271 .size_bits = 6 },
272 { MCMEMBER_REC_FIELD(sl),
273 .offset_words = 11,
274 .offset_bits = 0,
275 .size_bits = 4 },
276 { MCMEMBER_REC_FIELD(flow_label),
277 .offset_words = 11,
278 .offset_bits = 4,
279 .size_bits = 20 },
280 { MCMEMBER_REC_FIELD(hop_limit),
281 .offset_words = 11,
282 .offset_bits = 24,
283 .size_bits = 8 },
284 { MCMEMBER_REC_FIELD(scope),
285 .offset_words = 12,
286 .offset_bits = 0,
287 .size_bits = 4 },
288 { MCMEMBER_REC_FIELD(join_state),
289 .offset_words = 12,
290 .offset_bits = 4,
291 .size_bits = 4 },
292 { MCMEMBER_REC_FIELD(proxy_join),
293 .offset_words = 12,
294 .offset_bits = 8,
295 .size_bits = 1 },
296 { RESERVED,
297 .offset_words = 12,
298 .offset_bits = 9,
299 .size_bits = 23 },
300};
301
302#define SERVICE_REC_FIELD(field) \
303 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
304 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
305 .field_name = "sa_service_rec:" #field
306
307static const struct ib_field service_rec_table[] = {
308 { SERVICE_REC_FIELD(id),
309 .offset_words = 0,
310 .offset_bits = 0,
311 .size_bits = 64 },
312 { SERVICE_REC_FIELD(gid),
313 .offset_words = 2,
314 .offset_bits = 0,
315 .size_bits = 128 },
316 { SERVICE_REC_FIELD(pkey),
317 .offset_words = 6,
318 .offset_bits = 0,
319 .size_bits = 16 },
320 { SERVICE_REC_FIELD(lease),
321 .offset_words = 7,
322 .offset_bits = 0,
323 .size_bits = 32 },
324 { SERVICE_REC_FIELD(key),
325 .offset_words = 8,
326 .offset_bits = 0,
327 .size_bits = 128 },
328 { SERVICE_REC_FIELD(name),
329 .offset_words = 12,
330 .offset_bits = 0,
331 .size_bits = 64*8 },
332 { SERVICE_REC_FIELD(data8),
333 .offset_words = 28,
334 .offset_bits = 0,
335 .size_bits = 16*8 },
336 { SERVICE_REC_FIELD(data16),
337 .offset_words = 32,
338 .offset_bits = 0,
339 .size_bits = 8*16 },
340 { SERVICE_REC_FIELD(data32),
341 .offset_words = 36,
342 .offset_bits = 0,
343 .size_bits = 4*32 },
344 { SERVICE_REC_FIELD(data64),
345 .offset_words = 40,
346 .offset_bits = 0,
347 .size_bits = 2*64 },
348};
349
350static void free_sm_ah(struct kref *kref)
351{
352 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
353
354 ib_destroy_ah(sm_ah->ah);
355 kfree(sm_ah);
356}
357
358static void update_sm_ah(struct work_struct *work)
359{
360 struct ib_sa_port *port =
361 container_of(work, struct ib_sa_port, update_task);
362 struct ib_sa_sm_ah *new_ah;
363 struct ib_port_attr port_attr;
364 struct ib_ah_attr ah_attr;
365
366 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
367 printk(KERN_WARNING "Couldn't query port\n");
368 return;
369 }
370
371 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
372 if (!new_ah) {
373 printk(KERN_WARNING "Couldn't allocate new SM AH\n");
374 return;
375 }
376
377 kref_init(&new_ah->ref);
378 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
379
380 new_ah->pkey_index = 0;
381 if (ib_find_pkey(port->agent->device, port->port_num,
382 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
383 printk(KERN_ERR "Couldn't find index for default PKey\n");
384
385 memset(&ah_attr, 0, sizeof ah_attr);
386 ah_attr.dlid = port_attr.sm_lid;
387 ah_attr.sl = port_attr.sm_sl;
388 ah_attr.port_num = port->port_num;
389
390 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
391 if (IS_ERR(new_ah->ah)) {
392 printk(KERN_WARNING "Couldn't create new SM AH\n");
393 kfree(new_ah);
394 return;
395 }
396
397 spin_lock_irq(&port->ah_lock);
398 if (port->sm_ah)
399 kref_put(&port->sm_ah->ref, free_sm_ah);
400 port->sm_ah = new_ah;
401 spin_unlock_irq(&port->ah_lock);
402
403}
404
405static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
406{
407 if (event->event == IB_EVENT_PORT_ERR ||
408 event->event == IB_EVENT_PORT_ACTIVE ||
409 event->event == IB_EVENT_LID_CHANGE ||
410 event->event == IB_EVENT_PKEY_CHANGE ||
411 event->event == IB_EVENT_SM_CHANGE ||
412 event->event == IB_EVENT_CLIENT_REREGISTER) {
413 unsigned long flags;
414 struct ib_sa_device *sa_dev =
415 container_of(handler, typeof(*sa_dev), event_handler);
416 struct ib_sa_port *port =
417 &sa_dev->port[event->element.port_num - sa_dev->start_port];
418
419 if (rdma_port_get_link_layer(handler->device, port->port_num) != IB_LINK_LAYER_INFINIBAND)
420 return;
421
422 spin_lock_irqsave(&port->ah_lock, flags);
423 if (port->sm_ah)
424 kref_put(&port->sm_ah->ref, free_sm_ah);
425 port->sm_ah = NULL;
426 spin_unlock_irqrestore(&port->ah_lock, flags);
427
428 queue_work(ib_wq, &sa_dev->port[event->element.port_num -
429 sa_dev->start_port].update_task);
430 }
431}
432
433void ib_sa_register_client(struct ib_sa_client *client)
434{
435 atomic_set(&client->users, 1);
436 init_completion(&client->comp);
437}
438EXPORT_SYMBOL(ib_sa_register_client);
439
440void ib_sa_unregister_client(struct ib_sa_client *client)
441{
442 ib_sa_client_put(client);
443 wait_for_completion(&client->comp);
444}
445EXPORT_SYMBOL(ib_sa_unregister_client);
446
447/**
448 * ib_sa_cancel_query - try to cancel an SA query
449 * @id:ID of query to cancel
450 * @query:query pointer to cancel
451 *
452 * Try to cancel an SA query. If the id and query don't match up or
453 * the query has already completed, nothing is done. Otherwise the
454 * query is canceled and will complete with a status of -EINTR.
455 */
456void ib_sa_cancel_query(int id, struct ib_sa_query *query)
457{
458 unsigned long flags;
459 struct ib_mad_agent *agent;
460 struct ib_mad_send_buf *mad_buf;
461
462 spin_lock_irqsave(&idr_lock, flags);
463 if (idr_find(&query_idr, id) != query) {
464 spin_unlock_irqrestore(&idr_lock, flags);
465 return;
466 }
467 agent = query->port->agent;
468 mad_buf = query->mad_buf;
469 spin_unlock_irqrestore(&idr_lock, flags);
470
471 ib_cancel_mad(agent, mad_buf);
472}
473EXPORT_SYMBOL(ib_sa_cancel_query);
474
475static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
476{
477 struct ib_sa_device *sa_dev;
478 struct ib_sa_port *port;
479 unsigned long flags;
480 u8 src_path_mask;
481
482 sa_dev = ib_get_client_data(device, &sa_client);
483 if (!sa_dev)
484 return 0x7f;
485
486 port = &sa_dev->port[port_num - sa_dev->start_port];
487 spin_lock_irqsave(&port->ah_lock, flags);
488 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
489 spin_unlock_irqrestore(&port->ah_lock, flags);
490
491 return src_path_mask;
492}
493
494int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
495 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)
496{
497 int ret;
498 u16 gid_index;
499 int force_grh;
500
501 memset(ah_attr, 0, sizeof *ah_attr);
502 ah_attr->dlid = be16_to_cpu(rec->dlid);
503 ah_attr->sl = rec->sl;
504 ah_attr->src_path_bits = be16_to_cpu(rec->slid) &
505 get_src_path_mask(device, port_num);
506 ah_attr->port_num = port_num;
507 ah_attr->static_rate = rec->rate;
508
509 force_grh = rdma_port_get_link_layer(device, port_num) == IB_LINK_LAYER_ETHERNET;
510
511 if (rec->hop_limit > 1 || force_grh) {
512 ah_attr->ah_flags = IB_AH_GRH;
513 ah_attr->grh.dgid = rec->dgid;
514
515 ret = ib_find_cached_gid(device, &rec->sgid, &port_num,
516 &gid_index);
517 if (ret)
518 return ret;
519
520 ah_attr->grh.sgid_index = gid_index;
521 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label);
522 ah_attr->grh.hop_limit = rec->hop_limit;
523 ah_attr->grh.traffic_class = rec->traffic_class;
524 }
525 return 0;
526}
527EXPORT_SYMBOL(ib_init_ah_from_path);
528
529static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
530{
531 unsigned long flags;
532
533 spin_lock_irqsave(&query->port->ah_lock, flags);
534 if (!query->port->sm_ah) {
535 spin_unlock_irqrestore(&query->port->ah_lock, flags);
536 return -EAGAIN;
537 }
538 kref_get(&query->port->sm_ah->ref);
539 query->sm_ah = query->port->sm_ah;
540 spin_unlock_irqrestore(&query->port->ah_lock, flags);
541
542 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
543 query->sm_ah->pkey_index,
544 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
545 gfp_mask);
546 if (IS_ERR(query->mad_buf)) {
547 kref_put(&query->sm_ah->ref, free_sm_ah);
548 return -ENOMEM;
549 }
550
551 query->mad_buf->ah = query->sm_ah->ah;
552
553 return 0;
554}
555
556static void free_mad(struct ib_sa_query *query)
557{
558 ib_free_send_mad(query->mad_buf);
559 kref_put(&query->sm_ah->ref, free_sm_ah);
560}
561
562static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
563{
564 unsigned long flags;
565
566 memset(mad, 0, sizeof *mad);
567
568 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
569 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
570 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
571
572 spin_lock_irqsave(&tid_lock, flags);
573 mad->mad_hdr.tid =
574 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
575 spin_unlock_irqrestore(&tid_lock, flags);
576}
577
578static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
579{
580 unsigned long flags;
581 int ret, id;
582
583retry:
584 if (!idr_pre_get(&query_idr, gfp_mask))
585 return -ENOMEM;
586 spin_lock_irqsave(&idr_lock, flags);
587 ret = idr_get_new(&query_idr, query, &id);
588 spin_unlock_irqrestore(&idr_lock, flags);
589 if (ret == -EAGAIN)
590 goto retry;
591 if (ret)
592 return ret;
593
594 query->mad_buf->timeout_ms = timeout_ms;
595 query->mad_buf->context[0] = query;
596 query->id = id;
597
598 ret = ib_post_send_mad(query->mad_buf, NULL);
599 if (ret) {
600 spin_lock_irqsave(&idr_lock, flags);
601 idr_remove(&query_idr, id);
602 spin_unlock_irqrestore(&idr_lock, flags);
603 }
604
605 /*
606 * It's not safe to dereference query any more, because the
607 * send may already have completed and freed the query in
608 * another context.
609 */
610 return ret ? ret : id;
611}
612
613void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec)
614{
615 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
616}
617EXPORT_SYMBOL(ib_sa_unpack_path);
618
619static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
620 int status,
621 struct ib_sa_mad *mad)
622{
623 struct ib_sa_path_query *query =
624 container_of(sa_query, struct ib_sa_path_query, sa_query);
625
626 if (mad) {
627 struct ib_sa_path_rec rec;
628
629 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
630 mad->data, &rec);
631 query->callback(status, &rec, query->context);
632 } else
633 query->callback(status, NULL, query->context);
634}
635
636static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
637{
638 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
639}
640
641/**
642 * ib_sa_path_rec_get - Start a Path get query
643 * @client:SA client
644 * @device:device to send query on
645 * @port_num: port number to send query on
646 * @rec:Path Record to send in query
647 * @comp_mask:component mask to send in query
648 * @timeout_ms:time to wait for response
649 * @gfp_mask:GFP mask to use for internal allocations
650 * @callback:function called when query completes, times out or is
651 * canceled
652 * @context:opaque user context passed to callback
653 * @sa_query:query context, used to cancel query
654 *
655 * Send a Path Record Get query to the SA to look up a path. The
656 * callback function will be called when the query completes (or
657 * fails); status is 0 for a successful response, -EINTR if the query
658 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
659 * occurred sending the query. The resp parameter of the callback is
660 * only valid if status is 0.
661 *
662 * If the return value of ib_sa_path_rec_get() is negative, it is an
663 * error code. Otherwise it is a query ID that can be used to cancel
664 * the query.
665 */
666int ib_sa_path_rec_get(struct ib_sa_client *client,
667 struct ib_device *device, u8 port_num,
668 struct ib_sa_path_rec *rec,
669 ib_sa_comp_mask comp_mask,
670 int timeout_ms, gfp_t gfp_mask,
671 void (*callback)(int status,
672 struct ib_sa_path_rec *resp,
673 void *context),
674 void *context,
675 struct ib_sa_query **sa_query)
676{
677 struct ib_sa_path_query *query;
678 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
679 struct ib_sa_port *port;
680 struct ib_mad_agent *agent;
681 struct ib_sa_mad *mad;
682 int ret;
683
684 if (!sa_dev)
685 return -ENODEV;
686
687 port = &sa_dev->port[port_num - sa_dev->start_port];
688 agent = port->agent;
689
690 query = kmalloc(sizeof *query, gfp_mask);
691 if (!query)
692 return -ENOMEM;
693
694 query->sa_query.port = port;
695 ret = alloc_mad(&query->sa_query, gfp_mask);
696 if (ret)
697 goto err1;
698
699 ib_sa_client_get(client);
700 query->sa_query.client = client;
701 query->callback = callback;
702 query->context = context;
703
704 mad = query->sa_query.mad_buf->mad;
705 init_mad(mad, agent);
706
707 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
708 query->sa_query.release = ib_sa_path_rec_release;
709 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
710 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
711 mad->sa_hdr.comp_mask = comp_mask;
712
713 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
714
715 *sa_query = &query->sa_query;
716
717 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
718 if (ret < 0)
719 goto err2;
720
721 return ret;
722
723err2:
724 *sa_query = NULL;
725 ib_sa_client_put(query->sa_query.client);
726 free_mad(&query->sa_query);
727
728err1:
729 kfree(query);
730 return ret;
731}
732EXPORT_SYMBOL(ib_sa_path_rec_get);
733
734static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
735 int status,
736 struct ib_sa_mad *mad)
737{
738 struct ib_sa_service_query *query =
739 container_of(sa_query, struct ib_sa_service_query, sa_query);
740
741 if (mad) {
742 struct ib_sa_service_rec rec;
743
744 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
745 mad->data, &rec);
746 query->callback(status, &rec, query->context);
747 } else
748 query->callback(status, NULL, query->context);
749}
750
751static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
752{
753 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
754}
755
756/**
757 * ib_sa_service_rec_query - Start Service Record operation
758 * @client:SA client
759 * @device:device to send request on
760 * @port_num: port number to send request on
761 * @method:SA method - should be get, set, or delete
762 * @rec:Service Record to send in request
763 * @comp_mask:component mask to send in request
764 * @timeout_ms:time to wait for response
765 * @gfp_mask:GFP mask to use for internal allocations
766 * @callback:function called when request completes, times out or is
767 * canceled
768 * @context:opaque user context passed to callback
769 * @sa_query:request context, used to cancel request
770 *
771 * Send a Service Record set/get/delete to the SA to register,
772 * unregister or query a service record.
773 * The callback function will be called when the request completes (or
774 * fails); status is 0 for a successful response, -EINTR if the query
775 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
776 * occurred sending the query. The resp parameter of the callback is
777 * only valid if status is 0.
778 *
779 * If the return value of ib_sa_service_rec_query() is negative, it is an
780 * error code. Otherwise it is a request ID that can be used to cancel
781 * the query.
782 */
783int ib_sa_service_rec_query(struct ib_sa_client *client,
784 struct ib_device *device, u8 port_num, u8 method,
785 struct ib_sa_service_rec *rec,
786 ib_sa_comp_mask comp_mask,
787 int timeout_ms, gfp_t gfp_mask,
788 void (*callback)(int status,
789 struct ib_sa_service_rec *resp,
790 void *context),
791 void *context,
792 struct ib_sa_query **sa_query)
793{
794 struct ib_sa_service_query *query;
795 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
796 struct ib_sa_port *port;
797 struct ib_mad_agent *agent;
798 struct ib_sa_mad *mad;
799 int ret;
800
801 if (!sa_dev)
802 return -ENODEV;
803
804 port = &sa_dev->port[port_num - sa_dev->start_port];
805 agent = port->agent;
806
807 if (method != IB_MGMT_METHOD_GET &&
808 method != IB_MGMT_METHOD_SET &&
809 method != IB_SA_METHOD_DELETE)
810 return -EINVAL;
811
812 query = kmalloc(sizeof *query, gfp_mask);
813 if (!query)
814 return -ENOMEM;
815
816 query->sa_query.port = port;
817 ret = alloc_mad(&query->sa_query, gfp_mask);
818 if (ret)
819 goto err1;
820
821 ib_sa_client_get(client);
822 query->sa_query.client = client;
823 query->callback = callback;
824 query->context = context;
825
826 mad = query->sa_query.mad_buf->mad;
827 init_mad(mad, agent);
828
829 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
830 query->sa_query.release = ib_sa_service_rec_release;
831 mad->mad_hdr.method = method;
832 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
833 mad->sa_hdr.comp_mask = comp_mask;
834
835 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
836 rec, mad->data);
837
838 *sa_query = &query->sa_query;
839
840 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
841 if (ret < 0)
842 goto err2;
843
844 return ret;
845
846err2:
847 *sa_query = NULL;
848 ib_sa_client_put(query->sa_query.client);
849 free_mad(&query->sa_query);
850
851err1:
852 kfree(query);
853 return ret;
854}
855EXPORT_SYMBOL(ib_sa_service_rec_query);
856
857static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
858 int status,
859 struct ib_sa_mad *mad)
860{
861 struct ib_sa_mcmember_query *query =
862 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
863
864 if (mad) {
865 struct ib_sa_mcmember_rec rec;
866
867 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
868 mad->data, &rec);
869 query->callback(status, &rec, query->context);
870 } else
871 query->callback(status, NULL, query->context);
872}
873
874static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
875{
876 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
877}
878
879int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
880 struct ib_device *device, u8 port_num,
881 u8 method,
882 struct ib_sa_mcmember_rec *rec,
883 ib_sa_comp_mask comp_mask,
884 int timeout_ms, gfp_t gfp_mask,
885 void (*callback)(int status,
886 struct ib_sa_mcmember_rec *resp,
887 void *context),
888 void *context,
889 struct ib_sa_query **sa_query)
890{
891 struct ib_sa_mcmember_query *query;
892 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
893 struct ib_sa_port *port;
894 struct ib_mad_agent *agent;
895 struct ib_sa_mad *mad;
896 int ret;
897
898 if (!sa_dev)
899 return -ENODEV;
900
901 port = &sa_dev->port[port_num - sa_dev->start_port];
902 agent = port->agent;
903
904 query = kmalloc(sizeof *query, gfp_mask);
905 if (!query)
906 return -ENOMEM;
907
908 query->sa_query.port = port;
909 ret = alloc_mad(&query->sa_query, gfp_mask);
910 if (ret)
911 goto err1;
912
913 ib_sa_client_get(client);
914 query->sa_query.client = client;
915 query->callback = callback;
916 query->context = context;
917
918 mad = query->sa_query.mad_buf->mad;
919 init_mad(mad, agent);
920
921 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
922 query->sa_query.release = ib_sa_mcmember_rec_release;
923 mad->mad_hdr.method = method;
924 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
925 mad->sa_hdr.comp_mask = comp_mask;
926
927 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
928 rec, mad->data);
929
930 *sa_query = &query->sa_query;
931
932 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
933 if (ret < 0)
934 goto err2;
935
936 return ret;
937
938err2:
939 *sa_query = NULL;
940 ib_sa_client_put(query->sa_query.client);
941 free_mad(&query->sa_query);
942
943err1:
944 kfree(query);
945 return ret;
946}
947
948static void send_handler(struct ib_mad_agent *agent,
949 struct ib_mad_send_wc *mad_send_wc)
950{
951 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
952 unsigned long flags;
953
954 if (query->callback)
955 switch (mad_send_wc->status) {
956 case IB_WC_SUCCESS:
957 /* No callback -- already got recv */
958 break;
959 case IB_WC_RESP_TIMEOUT_ERR:
960 query->callback(query, -ETIMEDOUT, NULL);
961 break;
962 case IB_WC_WR_FLUSH_ERR:
963 query->callback(query, -EINTR, NULL);
964 break;
965 default:
966 query->callback(query, -EIO, NULL);
967 break;
968 }
969
970 spin_lock_irqsave(&idr_lock, flags);
971 idr_remove(&query_idr, query->id);
972 spin_unlock_irqrestore(&idr_lock, flags);
973
974 free_mad(query);
975 ib_sa_client_put(query->client);
976 query->release(query);
977}
978
979static void recv_handler(struct ib_mad_agent *mad_agent,
980 struct ib_mad_recv_wc *mad_recv_wc)
981{
982 struct ib_sa_query *query;
983 struct ib_mad_send_buf *mad_buf;
984
985 mad_buf = (void *) (unsigned long) mad_recv_wc->wc->wr_id;
986 query = mad_buf->context[0];
987
988 if (query->callback) {
989 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
990 query->callback(query,
991 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
992 -EINVAL : 0,
993 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
994 else
995 query->callback(query, -EIO, NULL);
996 }
997
998 ib_free_recv_mad(mad_recv_wc);
999}
1000
1001static void ib_sa_add_one(struct ib_device *device)
1002{
1003 struct ib_sa_device *sa_dev;
1004 int s, e, i;
1005
1006 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1007 return;
1008
1009 if (device->node_type == RDMA_NODE_IB_SWITCH)
1010 s = e = 0;
1011 else {
1012 s = 1;
1013 e = device->phys_port_cnt;
1014 }
1015
1016 sa_dev = kzalloc(sizeof *sa_dev +
1017 (e - s + 1) * sizeof (struct ib_sa_port),
1018 GFP_KERNEL);
1019 if (!sa_dev)
1020 return;
1021
1022 sa_dev->start_port = s;
1023 sa_dev->end_port = e;
1024
1025 for (i = 0; i <= e - s; ++i) {
1026 spin_lock_init(&sa_dev->port[i].ah_lock);
1027 if (rdma_port_get_link_layer(device, i + 1) != IB_LINK_LAYER_INFINIBAND)
1028 continue;
1029
1030 sa_dev->port[i].sm_ah = NULL;
1031 sa_dev->port[i].port_num = i + s;
1032
1033 sa_dev->port[i].agent =
1034 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
1035 NULL, 0, send_handler,
1036 recv_handler, sa_dev);
1037 if (IS_ERR(sa_dev->port[i].agent))
1038 goto err;
1039
1040 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
1041 }
1042
1043 ib_set_client_data(device, &sa_client, sa_dev);
1044
1045 /*
1046 * We register our event handler after everything is set up,
1047 * and then update our cached info after the event handler is
1048 * registered to avoid any problems if a port changes state
1049 * during our initialization.
1050 */
1051
1052 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
1053 if (ib_register_event_handler(&sa_dev->event_handler))
1054 goto err;
1055
1056 for (i = 0; i <= e - s; ++i)
1057 if (rdma_port_get_link_layer(device, i + 1) == IB_LINK_LAYER_INFINIBAND)
1058 update_sm_ah(&sa_dev->port[i].update_task);
1059
1060 return;
1061
1062err:
1063 while (--i >= 0)
1064 if (rdma_port_get_link_layer(device, i + 1) == IB_LINK_LAYER_INFINIBAND)
1065 ib_unregister_mad_agent(sa_dev->port[i].agent);
1066
1067 kfree(sa_dev);
1068
1069 return;
1070}
1071
1072static void ib_sa_remove_one(struct ib_device *device)
1073{
1074 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1075 int i;
1076
1077 if (!sa_dev)
1078 return;
1079
1080 ib_unregister_event_handler(&sa_dev->event_handler);
1081
1082 flush_workqueue(ib_wq);
1083
1084 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
1085 if (rdma_port_get_link_layer(device, i + 1) == IB_LINK_LAYER_INFINIBAND) {
1086 ib_unregister_mad_agent(sa_dev->port[i].agent);
1087 if (sa_dev->port[i].sm_ah)
1088 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
1089 }
1090
1091 }
1092
1093 kfree(sa_dev);
1094}
1095
1096static int __init ib_sa_init(void)
1097{
1098 int ret;
1099
1100 get_random_bytes(&tid, sizeof tid);
1101
1102 ret = ib_register_client(&sa_client);
1103 if (ret) {
1104 printk(KERN_ERR "Couldn't register ib_sa client\n");
1105 goto err1;
1106 }
1107
1108 ret = mcast_init();
1109 if (ret) {
1110 printk(KERN_ERR "Couldn't initialize multicast handling\n");
1111 goto err2;
1112 }
1113
1114 return 0;
1115err2:
1116 ib_unregister_client(&sa_client);
1117err1:
1118 return ret;
1119}
1120
1121static void __exit ib_sa_cleanup(void)
1122{
1123 mcast_cleanup();
1124 ib_unregister_client(&sa_client);
1125 idr_destroy(&query_idr);
1126}
1127
1128module_init(ib_sa_init);
1129module_exit(ib_sa_cleanup);
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 */
62static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT;
63
64struct ib_sa_sm_ah {
65 struct ib_ah *ah;
66 struct kref ref;
67 u16 pkey_index;
68 u8 src_path_mask;
69};
70
71enum rdma_class_port_info_type {
72 RDMA_CLASS_PORT_INFO_IB,
73 RDMA_CLASS_PORT_INFO_OPA
74};
75
76struct 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
84struct ib_sa_classport_cache {
85 bool valid;
86 int retry_cnt;
87 struct rdma_class_port_info data;
88};
89
90struct 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
101struct ib_sa_device {
102 int start_port, end_port;
103 struct ib_event_handler event_handler;
104 struct ib_sa_port port[];
105};
106
107struct 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
126struct 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
132struct 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
139struct 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
145struct ib_sa_classport_info_query {
146 void (*callback)(void *);
147 void *context;
148 struct ib_sa_query sa_query;
149};
150
151struct 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
157static LIST_HEAD(ib_nl_request_list);
158static DEFINE_SPINLOCK(ib_nl_request_lock);
159static atomic_t ib_nl_sa_request_seq;
160static struct workqueue_struct *ib_nl_wq;
161static struct delayed_work ib_nl_timed_work;
162static 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
177static int ib_sa_add_one(struct ib_device *device);
178static void ib_sa_remove_one(struct ib_device *device, void *client_data);
179
180static struct ib_client sa_client = {
181 .name = "sa",
182 .add = ib_sa_add_one,
183 .remove = ib_sa_remove_one
184};
185
186static DEFINE_XARRAY_FLAGS(queries, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
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_field(struct sa_path_rec, 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_field(struct sa_path_rec, 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_field(struct ib_sa_mcmember_rec, 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_field(struct ib_sa_service_rec, 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_field(struct ib_class_port_info, 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_field(struct opa_class_port_info, 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_field(struct ib_sa_guidinfo_rec, 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 = 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
802static 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
832static 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
887out:
888 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
889
890 return ret;
891}
892
893static 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
916static void send_handler(struct ib_mad_agent *agent,
917 struct ib_mad_send_wc *mad_send_wc);
918
919static 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
971static 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
1010int 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
1066settimeout_out:
1067 return 0;
1068}
1069
1070static 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
1086int 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
1137resp_out:
1138 return 0;
1139}
1140
1141static 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
1149void ib_sa_register_client(struct ib_sa_client *client)
1150{
1151 atomic_set(&client->users, 1);
1152 init_completion(&client->comp);
1153}
1154EXPORT_SYMBOL(ib_sa_register_client);
1155
1156void ib_sa_unregister_client(struct ib_sa_client *client)
1157{
1158 ib_sa_client_put(client);
1159 wait_for_completion(&client->comp);
1160}
1161EXPORT_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 */
1172void 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}
1195EXPORT_SYMBOL(ib_sa_cancel_query);
1196
1197static 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
1216static 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 */
1254int 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}
1289EXPORT_SYMBOL(ib_init_ah_attr_from_path);
1290
1291static 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
1331static 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
1337static 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
1358static 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
1398void 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}
1402EXPORT_SYMBOL(ib_sa_unpack_path);
1403
1404void 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}
1408EXPORT_SYMBOL(ib_sa_pack_path);
1409
1410static 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;
1426ret:
1427 spin_unlock_irqrestore(&port->classport_lock, flags);
1428 return ret;
1429}
1430
1431enum opa_pr_supported {
1432 PR_NOT_SUPPORTED,
1433 PR_OPA_SUPPORTED,
1434 PR_IB_SUPPORTED
1435};
1436
1437/**
1438 * Check if current PR query can be an OPA query.
1439 * Retuns PR_NOT_SUPPORTED if a path record query is not
1440 * possible, PR_OPA_SUPPORTED if an OPA path record query
1441 * is possible and PR_IB_SUPPORTED if an IB path record
1442 * query is possible.
1443 */
1444static int opa_pr_query_possible(struct ib_sa_client *client,
1445 struct ib_sa_device *sa_dev,
1446 struct ib_device *device, u8 port_num,
1447 struct sa_path_rec *rec)
1448{
1449 struct ib_port_attr port_attr;
1450
1451 if (ib_query_port(device, port_num, &port_attr))
1452 return PR_NOT_SUPPORTED;
1453
1454 if (ib_sa_opa_pathrecord_support(client, sa_dev, port_num))
1455 return PR_OPA_SUPPORTED;
1456
1457 if (port_attr.lid >= be16_to_cpu(IB_MULTICAST_LID_BASE))
1458 return PR_NOT_SUPPORTED;
1459 else
1460 return PR_IB_SUPPORTED;
1461}
1462
1463static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1464 int status,
1465 struct ib_sa_mad *mad)
1466{
1467 struct ib_sa_path_query *query =
1468 container_of(sa_query, struct ib_sa_path_query, sa_query);
1469
1470 if (mad) {
1471 struct sa_path_rec rec;
1472
1473 if (sa_query->flags & IB_SA_QUERY_OPA) {
1474 ib_unpack(opa_path_rec_table,
1475 ARRAY_SIZE(opa_path_rec_table),
1476 mad->data, &rec);
1477 rec.rec_type = SA_PATH_REC_TYPE_OPA;
1478 query->callback(status, &rec, query->context);
1479 } else {
1480 ib_unpack(path_rec_table,
1481 ARRAY_SIZE(path_rec_table),
1482 mad->data, &rec);
1483 rec.rec_type = SA_PATH_REC_TYPE_IB;
1484 sa_path_set_dmac_zero(&rec);
1485
1486 if (query->conv_pr) {
1487 struct sa_path_rec opa;
1488
1489 memset(&opa, 0, sizeof(struct sa_path_rec));
1490 sa_convert_path_ib_to_opa(&opa, &rec);
1491 query->callback(status, &opa, query->context);
1492 } else {
1493 query->callback(status, &rec, query->context);
1494 }
1495 }
1496 } else
1497 query->callback(status, NULL, query->context);
1498}
1499
1500static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1501{
1502 struct ib_sa_path_query *query =
1503 container_of(sa_query, struct ib_sa_path_query, sa_query);
1504
1505 kfree(query->conv_pr);
1506 kfree(query);
1507}
1508
1509/**
1510 * ib_sa_path_rec_get - Start a Path get query
1511 * @client:SA client
1512 * @device:device to send query on
1513 * @port_num: port number to send query on
1514 * @rec:Path Record to send in query
1515 * @comp_mask:component mask to send in query
1516 * @timeout_ms:time to wait for response
1517 * @gfp_mask:GFP mask to use for internal allocations
1518 * @callback:function called when query completes, times out or is
1519 * canceled
1520 * @context:opaque user context passed to callback
1521 * @sa_query:query context, used to cancel query
1522 *
1523 * Send a Path Record Get query to the SA to look up a path. The
1524 * callback function will be called when the query completes (or
1525 * fails); status is 0 for a successful response, -EINTR if the query
1526 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1527 * occurred sending the query. The resp parameter of the callback is
1528 * only valid if status is 0.
1529 *
1530 * If the return value of ib_sa_path_rec_get() is negative, it is an
1531 * error code. Otherwise it is a query ID that can be used to cancel
1532 * the query.
1533 */
1534int ib_sa_path_rec_get(struct ib_sa_client *client,
1535 struct ib_device *device, u8 port_num,
1536 struct sa_path_rec *rec,
1537 ib_sa_comp_mask comp_mask,
1538 unsigned long timeout_ms, gfp_t gfp_mask,
1539 void (*callback)(int status,
1540 struct sa_path_rec *resp,
1541 void *context),
1542 void *context,
1543 struct ib_sa_query **sa_query)
1544{
1545 struct ib_sa_path_query *query;
1546 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1547 struct ib_sa_port *port;
1548 struct ib_mad_agent *agent;
1549 struct ib_sa_mad *mad;
1550 enum opa_pr_supported status;
1551 int ret;
1552
1553 if (!sa_dev)
1554 return -ENODEV;
1555
1556 if ((rec->rec_type != SA_PATH_REC_TYPE_IB) &&
1557 (rec->rec_type != SA_PATH_REC_TYPE_OPA))
1558 return -EINVAL;
1559
1560 port = &sa_dev->port[port_num - sa_dev->start_port];
1561 agent = port->agent;
1562
1563 query = kzalloc(sizeof(*query), gfp_mask);
1564 if (!query)
1565 return -ENOMEM;
1566
1567 query->sa_query.port = port;
1568 if (rec->rec_type == SA_PATH_REC_TYPE_OPA) {
1569 status = opa_pr_query_possible(client, sa_dev, device, port_num,
1570 rec);
1571 if (status == PR_NOT_SUPPORTED) {
1572 ret = -EINVAL;
1573 goto err1;
1574 } else if (status == PR_OPA_SUPPORTED) {
1575 query->sa_query.flags |= IB_SA_QUERY_OPA;
1576 } else {
1577 query->conv_pr =
1578 kmalloc(sizeof(*query->conv_pr), gfp_mask);
1579 if (!query->conv_pr) {
1580 ret = -ENOMEM;
1581 goto err1;
1582 }
1583 }
1584 }
1585
1586 ret = alloc_mad(&query->sa_query, gfp_mask);
1587 if (ret)
1588 goto err2;
1589
1590 ib_sa_client_get(client);
1591 query->sa_query.client = client;
1592 query->callback = callback;
1593 query->context = context;
1594
1595 mad = query->sa_query.mad_buf->mad;
1596 init_mad(&query->sa_query, agent);
1597
1598 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1599 query->sa_query.release = ib_sa_path_rec_release;
1600 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1601 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1602 mad->sa_hdr.comp_mask = comp_mask;
1603
1604 if (query->sa_query.flags & IB_SA_QUERY_OPA) {
1605 ib_pack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table),
1606 rec, mad->data);
1607 } else if (query->conv_pr) {
1608 sa_convert_path_opa_to_ib(query->conv_pr, rec);
1609 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1610 query->conv_pr, mad->data);
1611 } else {
1612 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1613 rec, mad->data);
1614 }
1615
1616 *sa_query = &query->sa_query;
1617
1618 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1619 query->sa_query.mad_buf->context[1] = (query->conv_pr) ?
1620 query->conv_pr : rec;
1621
1622 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1623 if (ret < 0)
1624 goto err3;
1625
1626 return ret;
1627
1628err3:
1629 *sa_query = NULL;
1630 ib_sa_client_put(query->sa_query.client);
1631 free_mad(&query->sa_query);
1632err2:
1633 kfree(query->conv_pr);
1634err1:
1635 kfree(query);
1636 return ret;
1637}
1638EXPORT_SYMBOL(ib_sa_path_rec_get);
1639
1640static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1641 int status,
1642 struct ib_sa_mad *mad)
1643{
1644 struct ib_sa_service_query *query =
1645 container_of(sa_query, struct ib_sa_service_query, sa_query);
1646
1647 if (mad) {
1648 struct ib_sa_service_rec rec;
1649
1650 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1651 mad->data, &rec);
1652 query->callback(status, &rec, query->context);
1653 } else
1654 query->callback(status, NULL, query->context);
1655}
1656
1657static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1658{
1659 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1660}
1661
1662/**
1663 * ib_sa_service_rec_query - Start Service Record operation
1664 * @client:SA client
1665 * @device:device to send request on
1666 * @port_num: port number to send request on
1667 * @method:SA method - should be get, set, or delete
1668 * @rec:Service Record to send in request
1669 * @comp_mask:component mask to send in request
1670 * @timeout_ms:time to wait for response
1671 * @gfp_mask:GFP mask to use for internal allocations
1672 * @callback:function called when request completes, times out or is
1673 * canceled
1674 * @context:opaque user context passed to callback
1675 * @sa_query:request context, used to cancel request
1676 *
1677 * Send a Service Record set/get/delete to the SA to register,
1678 * unregister or query a service record.
1679 * The callback function will be called when the request completes (or
1680 * fails); status is 0 for a successful response, -EINTR if the query
1681 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1682 * occurred sending the query. The resp parameter of the callback is
1683 * only valid if status is 0.
1684 *
1685 * If the return value of ib_sa_service_rec_query() is negative, it is an
1686 * error code. Otherwise it is a request ID that can be used to cancel
1687 * the query.
1688 */
1689int ib_sa_service_rec_query(struct ib_sa_client *client,
1690 struct ib_device *device, u8 port_num, u8 method,
1691 struct ib_sa_service_rec *rec,
1692 ib_sa_comp_mask comp_mask,
1693 unsigned long timeout_ms, gfp_t gfp_mask,
1694 void (*callback)(int status,
1695 struct ib_sa_service_rec *resp,
1696 void *context),
1697 void *context,
1698 struct ib_sa_query **sa_query)
1699{
1700 struct ib_sa_service_query *query;
1701 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1702 struct ib_sa_port *port;
1703 struct ib_mad_agent *agent;
1704 struct ib_sa_mad *mad;
1705 int ret;
1706
1707 if (!sa_dev)
1708 return -ENODEV;
1709
1710 port = &sa_dev->port[port_num - sa_dev->start_port];
1711 agent = port->agent;
1712
1713 if (method != IB_MGMT_METHOD_GET &&
1714 method != IB_MGMT_METHOD_SET &&
1715 method != IB_SA_METHOD_DELETE)
1716 return -EINVAL;
1717
1718 query = kzalloc(sizeof(*query), gfp_mask);
1719 if (!query)
1720 return -ENOMEM;
1721
1722 query->sa_query.port = port;
1723 ret = alloc_mad(&query->sa_query, gfp_mask);
1724 if (ret)
1725 goto err1;
1726
1727 ib_sa_client_get(client);
1728 query->sa_query.client = client;
1729 query->callback = callback;
1730 query->context = context;
1731
1732 mad = query->sa_query.mad_buf->mad;
1733 init_mad(&query->sa_query, agent);
1734
1735 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1736 query->sa_query.release = ib_sa_service_rec_release;
1737 mad->mad_hdr.method = method;
1738 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1739 mad->sa_hdr.comp_mask = comp_mask;
1740
1741 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
1742 rec, mad->data);
1743
1744 *sa_query = &query->sa_query;
1745
1746 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1747 if (ret < 0)
1748 goto err2;
1749
1750 return ret;
1751
1752err2:
1753 *sa_query = NULL;
1754 ib_sa_client_put(query->sa_query.client);
1755 free_mad(&query->sa_query);
1756
1757err1:
1758 kfree(query);
1759 return ret;
1760}
1761EXPORT_SYMBOL(ib_sa_service_rec_query);
1762
1763static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1764 int status,
1765 struct ib_sa_mad *mad)
1766{
1767 struct ib_sa_mcmember_query *query =
1768 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1769
1770 if (mad) {
1771 struct ib_sa_mcmember_rec rec;
1772
1773 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1774 mad->data, &rec);
1775 query->callback(status, &rec, query->context);
1776 } else
1777 query->callback(status, NULL, query->context);
1778}
1779
1780static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1781{
1782 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1783}
1784
1785int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1786 struct ib_device *device, u8 port_num,
1787 u8 method,
1788 struct ib_sa_mcmember_rec *rec,
1789 ib_sa_comp_mask comp_mask,
1790 unsigned long timeout_ms, gfp_t gfp_mask,
1791 void (*callback)(int status,
1792 struct ib_sa_mcmember_rec *resp,
1793 void *context),
1794 void *context,
1795 struct ib_sa_query **sa_query)
1796{
1797 struct ib_sa_mcmember_query *query;
1798 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1799 struct ib_sa_port *port;
1800 struct ib_mad_agent *agent;
1801 struct ib_sa_mad *mad;
1802 int ret;
1803
1804 if (!sa_dev)
1805 return -ENODEV;
1806
1807 port = &sa_dev->port[port_num - sa_dev->start_port];
1808 agent = port->agent;
1809
1810 query = kzalloc(sizeof(*query), gfp_mask);
1811 if (!query)
1812 return -ENOMEM;
1813
1814 query->sa_query.port = port;
1815 ret = alloc_mad(&query->sa_query, gfp_mask);
1816 if (ret)
1817 goto err1;
1818
1819 ib_sa_client_get(client);
1820 query->sa_query.client = client;
1821 query->callback = callback;
1822 query->context = context;
1823
1824 mad = query->sa_query.mad_buf->mad;
1825 init_mad(&query->sa_query, agent);
1826
1827 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1828 query->sa_query.release = ib_sa_mcmember_rec_release;
1829 mad->mad_hdr.method = method;
1830 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1831 mad->sa_hdr.comp_mask = comp_mask;
1832
1833 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1834 rec, mad->data);
1835
1836 *sa_query = &query->sa_query;
1837
1838 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1839 if (ret < 0)
1840 goto err2;
1841
1842 return ret;
1843
1844err2:
1845 *sa_query = NULL;
1846 ib_sa_client_put(query->sa_query.client);
1847 free_mad(&query->sa_query);
1848
1849err1:
1850 kfree(query);
1851 return ret;
1852}
1853
1854/* Support GuidInfoRecord */
1855static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1856 int status,
1857 struct ib_sa_mad *mad)
1858{
1859 struct ib_sa_guidinfo_query *query =
1860 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1861
1862 if (mad) {
1863 struct ib_sa_guidinfo_rec rec;
1864
1865 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1866 mad->data, &rec);
1867 query->callback(status, &rec, query->context);
1868 } else
1869 query->callback(status, NULL, query->context);
1870}
1871
1872static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1873{
1874 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1875}
1876
1877int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1878 struct ib_device *device, u8 port_num,
1879 struct ib_sa_guidinfo_rec *rec,
1880 ib_sa_comp_mask comp_mask, u8 method,
1881 unsigned long timeout_ms, gfp_t gfp_mask,
1882 void (*callback)(int status,
1883 struct ib_sa_guidinfo_rec *resp,
1884 void *context),
1885 void *context,
1886 struct ib_sa_query **sa_query)
1887{
1888 struct ib_sa_guidinfo_query *query;
1889 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1890 struct ib_sa_port *port;
1891 struct ib_mad_agent *agent;
1892 struct ib_sa_mad *mad;
1893 int ret;
1894
1895 if (!sa_dev)
1896 return -ENODEV;
1897
1898 if (method != IB_MGMT_METHOD_GET &&
1899 method != IB_MGMT_METHOD_SET &&
1900 method != IB_SA_METHOD_DELETE) {
1901 return -EINVAL;
1902 }
1903
1904 port = &sa_dev->port[port_num - sa_dev->start_port];
1905 agent = port->agent;
1906
1907 query = kzalloc(sizeof(*query), gfp_mask);
1908 if (!query)
1909 return -ENOMEM;
1910
1911 query->sa_query.port = port;
1912 ret = alloc_mad(&query->sa_query, gfp_mask);
1913 if (ret)
1914 goto err1;
1915
1916 ib_sa_client_get(client);
1917 query->sa_query.client = client;
1918 query->callback = callback;
1919 query->context = context;
1920
1921 mad = query->sa_query.mad_buf->mad;
1922 init_mad(&query->sa_query, agent);
1923
1924 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1925 query->sa_query.release = ib_sa_guidinfo_rec_release;
1926
1927 mad->mad_hdr.method = method;
1928 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1929 mad->sa_hdr.comp_mask = comp_mask;
1930
1931 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1932 mad->data);
1933
1934 *sa_query = &query->sa_query;
1935
1936 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1937 if (ret < 0)
1938 goto err2;
1939
1940 return ret;
1941
1942err2:
1943 *sa_query = NULL;
1944 ib_sa_client_put(query->sa_query.client);
1945 free_mad(&query->sa_query);
1946
1947err1:
1948 kfree(query);
1949 return ret;
1950}
1951EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
1952
1953bool ib_sa_sendonly_fullmem_support(struct ib_sa_client *client,
1954 struct ib_device *device,
1955 u8 port_num)
1956{
1957 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1958 struct ib_sa_port *port;
1959 bool ret = false;
1960 unsigned long flags;
1961
1962 if (!sa_dev)
1963 return ret;
1964
1965 port = &sa_dev->port[port_num - sa_dev->start_port];
1966
1967 spin_lock_irqsave(&port->classport_lock, flags);
1968 if ((port->classport_info.valid) &&
1969 (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_IB))
1970 ret = ib_get_cpi_capmask2(&port->classport_info.data.ib)
1971 & IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT;
1972 spin_unlock_irqrestore(&port->classport_lock, flags);
1973 return ret;
1974}
1975EXPORT_SYMBOL(ib_sa_sendonly_fullmem_support);
1976
1977struct ib_classport_info_context {
1978 struct completion done;
1979 struct ib_sa_query *sa_query;
1980};
1981
1982static void ib_classportinfo_cb(void *context)
1983{
1984 struct ib_classport_info_context *cb_ctx = context;
1985
1986 complete(&cb_ctx->done);
1987}
1988
1989static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
1990 int status,
1991 struct ib_sa_mad *mad)
1992{
1993 unsigned long flags;
1994 struct ib_sa_classport_info_query *query =
1995 container_of(sa_query, struct ib_sa_classport_info_query, sa_query);
1996 struct ib_sa_classport_cache *info = &sa_query->port->classport_info;
1997
1998 if (mad) {
1999 if (sa_query->flags & IB_SA_QUERY_OPA) {
2000 struct opa_class_port_info rec;
2001
2002 ib_unpack(opa_classport_info_rec_table,
2003 ARRAY_SIZE(opa_classport_info_rec_table),
2004 mad->data, &rec);
2005
2006 spin_lock_irqsave(&sa_query->port->classport_lock,
2007 flags);
2008 if (!status && !info->valid) {
2009 memcpy(&info->data.opa, &rec,
2010 sizeof(info->data.opa));
2011
2012 info->valid = true;
2013 info->data.type = RDMA_CLASS_PORT_INFO_OPA;
2014 }
2015 spin_unlock_irqrestore(&sa_query->port->classport_lock,
2016 flags);
2017
2018 } else {
2019 struct ib_class_port_info rec;
2020
2021 ib_unpack(ib_classport_info_rec_table,
2022 ARRAY_SIZE(ib_classport_info_rec_table),
2023 mad->data, &rec);
2024
2025 spin_lock_irqsave(&sa_query->port->classport_lock,
2026 flags);
2027 if (!status && !info->valid) {
2028 memcpy(&info->data.ib, &rec,
2029 sizeof(info->data.ib));
2030
2031 info->valid = true;
2032 info->data.type = RDMA_CLASS_PORT_INFO_IB;
2033 }
2034 spin_unlock_irqrestore(&sa_query->port->classport_lock,
2035 flags);
2036 }
2037 }
2038 query->callback(query->context);
2039}
2040
2041static void ib_sa_classport_info_rec_release(struct ib_sa_query *sa_query)
2042{
2043 kfree(container_of(sa_query, struct ib_sa_classport_info_query,
2044 sa_query));
2045}
2046
2047static int ib_sa_classport_info_rec_query(struct ib_sa_port *port,
2048 unsigned long timeout_ms,
2049 void (*callback)(void *context),
2050 void *context,
2051 struct ib_sa_query **sa_query)
2052{
2053 struct ib_mad_agent *agent;
2054 struct ib_sa_classport_info_query *query;
2055 struct ib_sa_mad *mad;
2056 gfp_t gfp_mask = GFP_KERNEL;
2057 int ret;
2058
2059 agent = port->agent;
2060
2061 query = kzalloc(sizeof(*query), gfp_mask);
2062 if (!query)
2063 return -ENOMEM;
2064
2065 query->sa_query.port = port;
2066 query->sa_query.flags |= rdma_cap_opa_ah(port->agent->device,
2067 port->port_num) ?
2068 IB_SA_QUERY_OPA : 0;
2069 ret = alloc_mad(&query->sa_query, gfp_mask);
2070 if (ret)
2071 goto err_free;
2072
2073 query->callback = callback;
2074 query->context = context;
2075
2076 mad = query->sa_query.mad_buf->mad;
2077 init_mad(&query->sa_query, agent);
2078
2079 query->sa_query.callback = ib_sa_classport_info_rec_callback;
2080 query->sa_query.release = ib_sa_classport_info_rec_release;
2081 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
2082 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO);
2083 mad->sa_hdr.comp_mask = 0;
2084 *sa_query = &query->sa_query;
2085
2086 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
2087 if (ret < 0)
2088 goto err_free_mad;
2089
2090 return ret;
2091
2092err_free_mad:
2093 *sa_query = NULL;
2094 free_mad(&query->sa_query);
2095
2096err_free:
2097 kfree(query);
2098 return ret;
2099}
2100
2101static void update_ib_cpi(struct work_struct *work)
2102{
2103 struct ib_sa_port *port =
2104 container_of(work, struct ib_sa_port, ib_cpi_work.work);
2105 struct ib_classport_info_context *cb_context;
2106 unsigned long flags;
2107 int ret;
2108
2109 /* If the classport info is valid, nothing
2110 * to do here.
2111 */
2112 spin_lock_irqsave(&port->classport_lock, flags);
2113 if (port->classport_info.valid) {
2114 spin_unlock_irqrestore(&port->classport_lock, flags);
2115 return;
2116 }
2117 spin_unlock_irqrestore(&port->classport_lock, flags);
2118
2119 cb_context = kmalloc(sizeof(*cb_context), GFP_KERNEL);
2120 if (!cb_context)
2121 goto err_nomem;
2122
2123 init_completion(&cb_context->done);
2124
2125 ret = ib_sa_classport_info_rec_query(port, 3000,
2126 ib_classportinfo_cb, cb_context,
2127 &cb_context->sa_query);
2128 if (ret < 0)
2129 goto free_cb_err;
2130 wait_for_completion(&cb_context->done);
2131free_cb_err:
2132 kfree(cb_context);
2133 spin_lock_irqsave(&port->classport_lock, flags);
2134
2135 /* If the classport info is still not valid, the query should have
2136 * failed for some reason. Retry issuing the query
2137 */
2138 if (!port->classport_info.valid) {
2139 port->classport_info.retry_cnt++;
2140 if (port->classport_info.retry_cnt <=
2141 IB_SA_CPI_MAX_RETRY_CNT) {
2142 unsigned long delay =
2143 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2144
2145 queue_delayed_work(ib_wq, &port->ib_cpi_work, delay);
2146 }
2147 }
2148 spin_unlock_irqrestore(&port->classport_lock, flags);
2149
2150err_nomem:
2151 return;
2152}
2153
2154static void send_handler(struct ib_mad_agent *agent,
2155 struct ib_mad_send_wc *mad_send_wc)
2156{
2157 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
2158 unsigned long flags;
2159
2160 if (query->callback)
2161 switch (mad_send_wc->status) {
2162 case IB_WC_SUCCESS:
2163 /* No callback -- already got recv */
2164 break;
2165 case IB_WC_RESP_TIMEOUT_ERR:
2166 query->callback(query, -ETIMEDOUT, NULL);
2167 break;
2168 case IB_WC_WR_FLUSH_ERR:
2169 query->callback(query, -EINTR, NULL);
2170 break;
2171 default:
2172 query->callback(query, -EIO, NULL);
2173 break;
2174 }
2175
2176 xa_lock_irqsave(&queries, flags);
2177 __xa_erase(&queries, query->id);
2178 xa_unlock_irqrestore(&queries, flags);
2179
2180 free_mad(query);
2181 if (query->client)
2182 ib_sa_client_put(query->client);
2183 query->release(query);
2184}
2185
2186static void recv_handler(struct ib_mad_agent *mad_agent,
2187 struct ib_mad_send_buf *send_buf,
2188 struct ib_mad_recv_wc *mad_recv_wc)
2189{
2190 struct ib_sa_query *query;
2191
2192 if (!send_buf)
2193 return;
2194
2195 query = send_buf->context[0];
2196 if (query->callback) {
2197 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
2198 query->callback(query,
2199 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
2200 -EINVAL : 0,
2201 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
2202 else
2203 query->callback(query, -EIO, NULL);
2204 }
2205
2206 ib_free_recv_mad(mad_recv_wc);
2207}
2208
2209static void update_sm_ah(struct work_struct *work)
2210{
2211 struct ib_sa_port *port =
2212 container_of(work, struct ib_sa_port, update_task);
2213 struct ib_sa_sm_ah *new_ah;
2214 struct ib_port_attr port_attr;
2215 struct rdma_ah_attr ah_attr;
2216 bool grh_required;
2217
2218 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
2219 pr_warn("Couldn't query port\n");
2220 return;
2221 }
2222
2223 new_ah = kmalloc(sizeof(*new_ah), GFP_KERNEL);
2224 if (!new_ah)
2225 return;
2226
2227 kref_init(&new_ah->ref);
2228 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
2229
2230 new_ah->pkey_index = 0;
2231 if (ib_find_pkey(port->agent->device, port->port_num,
2232 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
2233 pr_err("Couldn't find index for default PKey\n");
2234
2235 memset(&ah_attr, 0, sizeof(ah_attr));
2236 ah_attr.type = rdma_ah_find_type(port->agent->device,
2237 port->port_num);
2238 rdma_ah_set_dlid(&ah_attr, port_attr.sm_lid);
2239 rdma_ah_set_sl(&ah_attr, port_attr.sm_sl);
2240 rdma_ah_set_port_num(&ah_attr, port->port_num);
2241
2242 grh_required = rdma_is_grh_required(port->agent->device,
2243 port->port_num);
2244
2245 /*
2246 * The OPA sm_lid of 0xFFFF needs special handling so that it can be
2247 * differentiated from a permissive LID of 0xFFFF. We set the
2248 * grh_required flag here so the SA can program the DGID in the
2249 * address handle appropriately
2250 */
2251 if (ah_attr.type == RDMA_AH_ATTR_TYPE_OPA &&
2252 (grh_required ||
2253 port_attr.sm_lid == be16_to_cpu(IB_LID_PERMISSIVE)))
2254 rdma_ah_set_make_grd(&ah_attr, true);
2255
2256 if (ah_attr.type == RDMA_AH_ATTR_TYPE_IB && grh_required) {
2257 rdma_ah_set_ah_flags(&ah_attr, IB_AH_GRH);
2258 rdma_ah_set_subnet_prefix(&ah_attr,
2259 cpu_to_be64(port_attr.subnet_prefix));
2260 rdma_ah_set_interface_id(&ah_attr,
2261 cpu_to_be64(IB_SA_WELL_KNOWN_GUID));
2262 }
2263
2264 new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr,
2265 RDMA_CREATE_AH_SLEEPABLE);
2266 if (IS_ERR(new_ah->ah)) {
2267 pr_warn("Couldn't create new SM AH\n");
2268 kfree(new_ah);
2269 return;
2270 }
2271
2272 spin_lock_irq(&port->ah_lock);
2273 if (port->sm_ah)
2274 kref_put(&port->sm_ah->ref, free_sm_ah);
2275 port->sm_ah = new_ah;
2276 spin_unlock_irq(&port->ah_lock);
2277}
2278
2279static void ib_sa_event(struct ib_event_handler *handler,
2280 struct ib_event *event)
2281{
2282 if (event->event == IB_EVENT_PORT_ERR ||
2283 event->event == IB_EVENT_PORT_ACTIVE ||
2284 event->event == IB_EVENT_LID_CHANGE ||
2285 event->event == IB_EVENT_PKEY_CHANGE ||
2286 event->event == IB_EVENT_SM_CHANGE ||
2287 event->event == IB_EVENT_CLIENT_REREGISTER) {
2288 unsigned long flags;
2289 struct ib_sa_device *sa_dev =
2290 container_of(handler, typeof(*sa_dev), event_handler);
2291 u8 port_num = event->element.port_num - sa_dev->start_port;
2292 struct ib_sa_port *port = &sa_dev->port[port_num];
2293
2294 if (!rdma_cap_ib_sa(handler->device, port->port_num))
2295 return;
2296
2297 spin_lock_irqsave(&port->ah_lock, flags);
2298 if (port->sm_ah)
2299 kref_put(&port->sm_ah->ref, free_sm_ah);
2300 port->sm_ah = NULL;
2301 spin_unlock_irqrestore(&port->ah_lock, flags);
2302
2303 if (event->event == IB_EVENT_SM_CHANGE ||
2304 event->event == IB_EVENT_CLIENT_REREGISTER ||
2305 event->event == IB_EVENT_LID_CHANGE ||
2306 event->event == IB_EVENT_PORT_ACTIVE) {
2307 unsigned long delay =
2308 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2309
2310 spin_lock_irqsave(&port->classport_lock, flags);
2311 port->classport_info.valid = false;
2312 port->classport_info.retry_cnt = 0;
2313 spin_unlock_irqrestore(&port->classport_lock, flags);
2314 queue_delayed_work(ib_wq,
2315 &port->ib_cpi_work, delay);
2316 }
2317 queue_work(ib_wq, &sa_dev->port[port_num].update_task);
2318 }
2319}
2320
2321static int ib_sa_add_one(struct ib_device *device)
2322{
2323 struct ib_sa_device *sa_dev;
2324 int s, e, i;
2325 int count = 0;
2326 int ret;
2327
2328 s = rdma_start_port(device);
2329 e = rdma_end_port(device);
2330
2331 sa_dev = kzalloc(struct_size(sa_dev, port, e - s + 1), GFP_KERNEL);
2332 if (!sa_dev)
2333 return -ENOMEM;
2334
2335 sa_dev->start_port = s;
2336 sa_dev->end_port = e;
2337
2338 for (i = 0; i <= e - s; ++i) {
2339 spin_lock_init(&sa_dev->port[i].ah_lock);
2340 if (!rdma_cap_ib_sa(device, i + 1))
2341 continue;
2342
2343 sa_dev->port[i].sm_ah = NULL;
2344 sa_dev->port[i].port_num = i + s;
2345
2346 spin_lock_init(&sa_dev->port[i].classport_lock);
2347 sa_dev->port[i].classport_info.valid = false;
2348
2349 sa_dev->port[i].agent =
2350 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
2351 NULL, 0, send_handler,
2352 recv_handler, sa_dev, 0);
2353 if (IS_ERR(sa_dev->port[i].agent)) {
2354 ret = PTR_ERR(sa_dev->port[i].agent);
2355 goto err;
2356 }
2357
2358 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
2359 INIT_DELAYED_WORK(&sa_dev->port[i].ib_cpi_work,
2360 update_ib_cpi);
2361
2362 count++;
2363 }
2364
2365 if (!count) {
2366 ret = -EOPNOTSUPP;
2367 goto free;
2368 }
2369
2370 ib_set_client_data(device, &sa_client, sa_dev);
2371
2372 /*
2373 * We register our event handler after everything is set up,
2374 * and then update our cached info after the event handler is
2375 * registered to avoid any problems if a port changes state
2376 * during our initialization.
2377 */
2378
2379 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
2380 ib_register_event_handler(&sa_dev->event_handler);
2381
2382 for (i = 0; i <= e - s; ++i) {
2383 if (rdma_cap_ib_sa(device, i + 1))
2384 update_sm_ah(&sa_dev->port[i].update_task);
2385 }
2386
2387 return 0;
2388
2389err:
2390 while (--i >= 0) {
2391 if (rdma_cap_ib_sa(device, i + 1))
2392 ib_unregister_mad_agent(sa_dev->port[i].agent);
2393 }
2394free:
2395 kfree(sa_dev);
2396 return ret;
2397}
2398
2399static void ib_sa_remove_one(struct ib_device *device, void *client_data)
2400{
2401 struct ib_sa_device *sa_dev = client_data;
2402 int i;
2403
2404 ib_unregister_event_handler(&sa_dev->event_handler);
2405 flush_workqueue(ib_wq);
2406
2407 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
2408 if (rdma_cap_ib_sa(device, i + 1)) {
2409 cancel_delayed_work_sync(&sa_dev->port[i].ib_cpi_work);
2410 ib_unregister_mad_agent(sa_dev->port[i].agent);
2411 if (sa_dev->port[i].sm_ah)
2412 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
2413 }
2414
2415 }
2416
2417 kfree(sa_dev);
2418}
2419
2420int ib_sa_init(void)
2421{
2422 int ret;
2423
2424 get_random_bytes(&tid, sizeof tid);
2425
2426 atomic_set(&ib_nl_sa_request_seq, 0);
2427
2428 ret = ib_register_client(&sa_client);
2429 if (ret) {
2430 pr_err("Couldn't register ib_sa client\n");
2431 goto err1;
2432 }
2433
2434 ret = mcast_init();
2435 if (ret) {
2436 pr_err("Couldn't initialize multicast handling\n");
2437 goto err2;
2438 }
2439
2440 ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM);
2441 if (!ib_nl_wq) {
2442 ret = -ENOMEM;
2443 goto err3;
2444 }
2445
2446 INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
2447
2448 return 0;
2449
2450err3:
2451 mcast_cleanup();
2452err2:
2453 ib_unregister_client(&sa_client);
2454err1:
2455 return ret;
2456}
2457
2458void ib_sa_cleanup(void)
2459{
2460 cancel_delayed_work(&ib_nl_timed_work);
2461 flush_workqueue(ib_nl_wq);
2462 destroy_workqueue(ib_nl_wq);
2463 mcast_cleanup();
2464 ib_unregister_client(&sa_client);
2465 WARN_ON(!xa_empty(&queries));
2466}