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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / infiniband / core / sa_query.c
blobf820958e4047fbf47cb0e51934aa7d36cb314356
1 /*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
4 * Copyright (c) 2006 Intel Corporation. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35 #include <linux/module.h>
36 #include <linux/init.h>
37 #include <linux/err.h>
38 #include <linux/random.h>
39 #include <linux/spinlock.h>
40 #include <linux/slab.h>
41 #include <linux/dma-mapping.h>
42 #include <linux/kref.h>
43 #include <linux/idr.h>
44 #include <linux/workqueue.h>
45 #include <uapi/linux/if_ether.h>
46 #include <rdma/ib_pack.h>
47 #include <rdma/ib_cache.h>
48 #include "sa.h"
49
50 MODULE_AUTHOR("Roland Dreier");
51 MODULE_DESCRIPTION("InfiniBand subnet administration query support");
52 MODULE_LICENSE("Dual BSD/GPL");
53
54 struct ib_sa_sm_ah {
55 struct ib_ah *ah;
56 struct kref ref;
57 u16 pkey_index;
58 u8 src_path_mask;
59 };
60
61 struct 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
69 struct 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
75 struct 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
85 struct 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
91 struct 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
97 struct ib_sa_guidinfo_query {
98 void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
99 void *context;
100 struct ib_sa_query sa_query;
101 };
102
103 struct ib_sa_mcmember_query {
104 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
105 void *context;
106 struct ib_sa_query sa_query;
107 };
108
109 static void ib_sa_add_one(struct ib_device *device);
110 static void ib_sa_remove_one(struct ib_device *device);
111
112 static struct ib_client sa_client = {
113 .name = "sa",
114 .add = ib_sa_add_one,
115 .remove = ib_sa_remove_one
116 };
117
118 static DEFINE_SPINLOCK(idr_lock);
119 static DEFINE_IDR(query_idr);
120
121 static DEFINE_SPINLOCK(tid_lock);
122 static u32 tid;
123
124 #define PATH_REC_FIELD(field) \
125 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
126 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
127 .field_name = "sa_path_rec:" #field
128
129 static const struct ib_field path_rec_table[] = {
130 { PATH_REC_FIELD(service_id),
131 .offset_words = 0,
132 .offset_bits = 0,
133 .size_bits = 64 },
134 { PATH_REC_FIELD(dgid),
135 .offset_words = 2,
136 .offset_bits = 0,
137 .size_bits = 128 },
138 { PATH_REC_FIELD(sgid),
139 .offset_words = 6,
140 .offset_bits = 0,
141 .size_bits = 128 },
142 { PATH_REC_FIELD(dlid),
143 .offset_words = 10,
144 .offset_bits = 0,
145 .size_bits = 16 },
146 { PATH_REC_FIELD(slid),
147 .offset_words = 10,
148 .offset_bits = 16,
149 .size_bits = 16 },
150 { PATH_REC_FIELD(raw_traffic),
151 .offset_words = 11,
152 .offset_bits = 0,
153 .size_bits = 1 },
154 { RESERVED,
155 .offset_words = 11,
156 .offset_bits = 1,
157 .size_bits = 3 },
158 { PATH_REC_FIELD(flow_label),
159 .offset_words = 11,
160 .offset_bits = 4,
161 .size_bits = 20 },
162 { PATH_REC_FIELD(hop_limit),
163 .offset_words = 11,
164 .offset_bits = 24,
165 .size_bits = 8 },
166 { PATH_REC_FIELD(traffic_class),
167 .offset_words = 12,
168 .offset_bits = 0,
169 .size_bits = 8 },
170 { PATH_REC_FIELD(reversible),
171 .offset_words = 12,
172 .offset_bits = 8,
173 .size_bits = 1 },
174 { PATH_REC_FIELD(numb_path),
175 .offset_words = 12,
176 .offset_bits = 9,
177 .size_bits = 7 },
178 { PATH_REC_FIELD(pkey),
179 .offset_words = 12,
180 .offset_bits = 16,
181 .size_bits = 16 },
182 { PATH_REC_FIELD(qos_class),
183 .offset_words = 13,
184 .offset_bits = 0,
185 .size_bits = 12 },
186 { PATH_REC_FIELD(sl),
187 .offset_words = 13,
188 .offset_bits = 12,
189 .size_bits = 4 },
190 { PATH_REC_FIELD(mtu_selector),
191 .offset_words = 13,
192 .offset_bits = 16,
193 .size_bits = 2 },
194 { PATH_REC_FIELD(mtu),
195 .offset_words = 13,
196 .offset_bits = 18,
197 .size_bits = 6 },
198 { PATH_REC_FIELD(rate_selector),
199 .offset_words = 13,
200 .offset_bits = 24,
201 .size_bits = 2 },
202 { PATH_REC_FIELD(rate),
203 .offset_words = 13,
204 .offset_bits = 26,
205 .size_bits = 6 },
206 { PATH_REC_FIELD(packet_life_time_selector),
207 .offset_words = 14,
208 .offset_bits = 0,
209 .size_bits = 2 },
210 { PATH_REC_FIELD(packet_life_time),
211 .offset_words = 14,
212 .offset_bits = 2,
213 .size_bits = 6 },
214 { PATH_REC_FIELD(preference),
215 .offset_words = 14,
216 .offset_bits = 8,
217 .size_bits = 8 },
218 { RESERVED,
219 .offset_words = 14,
220 .offset_bits = 16,
221 .size_bits = 48 },
222 };
223
224 #define MCMEMBER_REC_FIELD(field) \
225 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
226 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
227 .field_name = "sa_mcmember_rec:" #field
228
229 static const struct ib_field mcmember_rec_table[] = {
230 { MCMEMBER_REC_FIELD(mgid),
231 .offset_words = 0,
232 .offset_bits = 0,
233 .size_bits = 128 },
234 { MCMEMBER_REC_FIELD(port_gid),
235 .offset_words = 4,
236 .offset_bits = 0,
237 .size_bits = 128 },
238 { MCMEMBER_REC_FIELD(qkey),
239 .offset_words = 8,
240 .offset_bits = 0,
241 .size_bits = 32 },
242 { MCMEMBER_REC_FIELD(mlid),
243 .offset_words = 9,
244 .offset_bits = 0,
245 .size_bits = 16 },
246 { MCMEMBER_REC_FIELD(mtu_selector),
247 .offset_words = 9,
248 .offset_bits = 16,
249 .size_bits = 2 },
250 { MCMEMBER_REC_FIELD(mtu),
251 .offset_words = 9,
252 .offset_bits = 18,
253 .size_bits = 6 },
254 { MCMEMBER_REC_FIELD(traffic_class),
255 .offset_words = 9,
256 .offset_bits = 24,
257 .size_bits = 8 },
258 { MCMEMBER_REC_FIELD(pkey),
259 .offset_words = 10,
260 .offset_bits = 0,
261 .size_bits = 16 },
262 { MCMEMBER_REC_FIELD(rate_selector),
263 .offset_words = 10,
264 .offset_bits = 16,
265 .size_bits = 2 },
266 { MCMEMBER_REC_FIELD(rate),
267 .offset_words = 10,
268 .offset_bits = 18,
269 .size_bits = 6 },
270 { MCMEMBER_REC_FIELD(packet_life_time_selector),
271 .offset_words = 10,
272 .offset_bits = 24,
273 .size_bits = 2 },
274 { MCMEMBER_REC_FIELD(packet_life_time),
275 .offset_words = 10,
276 .offset_bits = 26,
277 .size_bits = 6 },
278 { MCMEMBER_REC_FIELD(sl),
279 .offset_words = 11,
280 .offset_bits = 0,
281 .size_bits = 4 },
282 { MCMEMBER_REC_FIELD(flow_label),
283 .offset_words = 11,
284 .offset_bits = 4,
285 .size_bits = 20 },
286 { MCMEMBER_REC_FIELD(hop_limit),
287 .offset_words = 11,
288 .offset_bits = 24,
289 .size_bits = 8 },
290 { MCMEMBER_REC_FIELD(scope),
291 .offset_words = 12,
292 .offset_bits = 0,
293 .size_bits = 4 },
294 { MCMEMBER_REC_FIELD(join_state),
295 .offset_words = 12,
296 .offset_bits = 4,
297 .size_bits = 4 },
298 { MCMEMBER_REC_FIELD(proxy_join),
299 .offset_words = 12,
300 .offset_bits = 8,
301 .size_bits = 1 },
302 { RESERVED,
303 .offset_words = 12,
304 .offset_bits = 9,
305 .size_bits = 23 },
306 };
307
308 #define SERVICE_REC_FIELD(field) \
309 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
310 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
311 .field_name = "sa_service_rec:" #field
312
313 static const struct ib_field service_rec_table[] = {
314 { SERVICE_REC_FIELD(id),
315 .offset_words = 0,
316 .offset_bits = 0,
317 .size_bits = 64 },
318 { SERVICE_REC_FIELD(gid),
319 .offset_words = 2,
320 .offset_bits = 0,
321 .size_bits = 128 },
322 { SERVICE_REC_FIELD(pkey),
323 .offset_words = 6,
324 .offset_bits = 0,
325 .size_bits = 16 },
326 { SERVICE_REC_FIELD(lease),
327 .offset_words = 7,
328 .offset_bits = 0,
329 .size_bits = 32 },
330 { SERVICE_REC_FIELD(key),
331 .offset_words = 8,
332 .offset_bits = 0,
333 .size_bits = 128 },
334 { SERVICE_REC_FIELD(name),
335 .offset_words = 12,
336 .offset_bits = 0,
337 .size_bits = 64*8 },
338 { SERVICE_REC_FIELD(data8),
339 .offset_words = 28,
340 .offset_bits = 0,
341 .size_bits = 16*8 },
342 { SERVICE_REC_FIELD(data16),
343 .offset_words = 32,
344 .offset_bits = 0,
345 .size_bits = 8*16 },
346 { SERVICE_REC_FIELD(data32),
347 .offset_words = 36,
348 .offset_bits = 0,
349 .size_bits = 4*32 },
350 { SERVICE_REC_FIELD(data64),
351 .offset_words = 40,
352 .offset_bits = 0,
353 .size_bits = 2*64 },
354 };
355
356 #define GUIDINFO_REC_FIELD(field) \
357 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \
358 .struct_size_bytes = sizeof((struct ib_sa_guidinfo_rec *) 0)->field, \
359 .field_name = "sa_guidinfo_rec:" #field
360
361 static const struct ib_field guidinfo_rec_table[] = {
362 { GUIDINFO_REC_FIELD(lid),
363 .offset_words = 0,
364 .offset_bits = 0,
365 .size_bits = 16 },
366 { GUIDINFO_REC_FIELD(block_num),
367 .offset_words = 0,
368 .offset_bits = 16,
369 .size_bits = 8 },
370 { GUIDINFO_REC_FIELD(res1),
371 .offset_words = 0,
372 .offset_bits = 24,
373 .size_bits = 8 },
374 { GUIDINFO_REC_FIELD(res2),
375 .offset_words = 1,
376 .offset_bits = 0,
377 .size_bits = 32 },
378 { GUIDINFO_REC_FIELD(guid_info_list),
379 .offset_words = 2,
380 .offset_bits = 0,
381 .size_bits = 512 },
382 };
383
384 static void free_sm_ah(struct kref *kref)
385 {
386 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
387
388 ib_destroy_ah(sm_ah->ah);
389 kfree(sm_ah);
390 }
391
392 static void update_sm_ah(struct work_struct *work)
393 {
394 struct ib_sa_port *port =
395 container_of(work, struct ib_sa_port, update_task);
396 struct ib_sa_sm_ah *new_ah;
397 struct ib_port_attr port_attr;
398 struct ib_ah_attr ah_attr;
399
400 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
401 printk(KERN_WARNING "Couldn't query port\n");
402 return;
403 }
404
405 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
406 if (!new_ah) {
407 printk(KERN_WARNING "Couldn't allocate new SM AH\n");
408 return;
409 }
410
411 kref_init(&new_ah->ref);
412 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
413
414 new_ah->pkey_index = 0;
415 if (ib_find_pkey(port->agent->device, port->port_num,
416 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
417 printk(KERN_ERR "Couldn't find index for default PKey\n");
418
419 memset(&ah_attr, 0, sizeof ah_attr);
420 ah_attr.dlid = port_attr.sm_lid;
421 ah_attr.sl = port_attr.sm_sl;
422 ah_attr.port_num = port->port_num;
423
424 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
425 if (IS_ERR(new_ah->ah)) {
426 printk(KERN_WARNING "Couldn't create new SM AH\n");
427 kfree(new_ah);
428 return;
429 }
430
431 spin_lock_irq(&port->ah_lock);
432 if (port->sm_ah)
433 kref_put(&port->sm_ah->ref, free_sm_ah);
434 port->sm_ah = new_ah;
435 spin_unlock_irq(&port->ah_lock);
436
437 }
438
439 static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
440 {
441 if (event->event == IB_EVENT_PORT_ERR ||
442 event->event == IB_EVENT_PORT_ACTIVE ||
443 event->event == IB_EVENT_LID_CHANGE ||
444 event->event == IB_EVENT_PKEY_CHANGE ||
445 event->event == IB_EVENT_SM_CHANGE ||
446 event->event == IB_EVENT_CLIENT_REREGISTER) {
447 unsigned long flags;
448 struct ib_sa_device *sa_dev =
449 container_of(handler, typeof(*sa_dev), event_handler);
450 struct ib_sa_port *port =
451 &sa_dev->port[event->element.port_num - sa_dev->start_port];
452
453 if (rdma_port_get_link_layer(handler->device, port->port_num) != IB_LINK_LAYER_INFINIBAND)
454 return;
455
456 spin_lock_irqsave(&port->ah_lock, flags);
457 if (port->sm_ah)
458 kref_put(&port->sm_ah->ref, free_sm_ah);
459 port->sm_ah = NULL;
460 spin_unlock_irqrestore(&port->ah_lock, flags);
461
462 queue_work(ib_wq, &sa_dev->port[event->element.port_num -
463 sa_dev->start_port].update_task);
464 }
465 }
466
467 void ib_sa_register_client(struct ib_sa_client *client)
468 {
469 atomic_set(&client->users, 1);
470 init_completion(&client->comp);
471 }
472 EXPORT_SYMBOL(ib_sa_register_client);
473
474 void ib_sa_unregister_client(struct ib_sa_client *client)
475 {
476 ib_sa_client_put(client);
477 wait_for_completion(&client->comp);
478 }
479 EXPORT_SYMBOL(ib_sa_unregister_client);
480
481 /**
482 * ib_sa_cancel_query - try to cancel an SA query
483 * @id:ID of query to cancel
484 * @query:query pointer to cancel
485 *
486 * Try to cancel an SA query. If the id and query don't match up or
487 * the query has already completed, nothing is done. Otherwise the
488 * query is canceled and will complete with a status of -EINTR.
489 */
490 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
491 {
492 unsigned long flags;
493 struct ib_mad_agent *agent;
494 struct ib_mad_send_buf *mad_buf;
495
496 spin_lock_irqsave(&idr_lock, flags);
497 if (idr_find(&query_idr, id) != query) {
498 spin_unlock_irqrestore(&idr_lock, flags);
499 return;
500 }
501 agent = query->port->agent;
502 mad_buf = query->mad_buf;
503 spin_unlock_irqrestore(&idr_lock, flags);
504
505 ib_cancel_mad(agent, mad_buf);
506 }
507 EXPORT_SYMBOL(ib_sa_cancel_query);
508
509 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
510 {
511 struct ib_sa_device *sa_dev;
512 struct ib_sa_port *port;
513 unsigned long flags;
514 u8 src_path_mask;
515
516 sa_dev = ib_get_client_data(device, &sa_client);
517 if (!sa_dev)
518 return 0x7f;
519
520 port = &sa_dev->port[port_num - sa_dev->start_port];
521 spin_lock_irqsave(&port->ah_lock, flags);
522 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
523 spin_unlock_irqrestore(&port->ah_lock, flags);
524
525 return src_path_mask;
526 }
527
528 int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
529 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)
530 {
531 int ret;
532 u16 gid_index;
533 int force_grh;
534
535 memset(ah_attr, 0, sizeof *ah_attr);
536 ah_attr->dlid = be16_to_cpu(rec->dlid);
537 ah_attr->sl = rec->sl;
538 ah_attr->src_path_bits = be16_to_cpu(rec->slid) &
539 get_src_path_mask(device, port_num);
540 ah_attr->port_num = port_num;
541 ah_attr->static_rate = rec->rate;
542
543 force_grh = rdma_port_get_link_layer(device, port_num) == IB_LINK_LAYER_ETHERNET;
544
545 if (rec->hop_limit > 1 || force_grh) {
546 ah_attr->ah_flags = IB_AH_GRH;
547 ah_attr->grh.dgid = rec->dgid;
548
549 ret = ib_find_cached_gid(device, &rec->sgid, &port_num,
550 &gid_index);
551 if (ret)
552 return ret;
553
554 ah_attr->grh.sgid_index = gid_index;
555 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label);
556 ah_attr->grh.hop_limit = rec->hop_limit;
557 ah_attr->grh.traffic_class = rec->traffic_class;
558 }
559 if (force_grh) {
560 memcpy(ah_attr->dmac, rec->dmac, ETH_ALEN);
561 ah_attr->vlan_id = rec->vlan_id;
562 } else {
563 ah_attr->vlan_id = 0xffff;
564 }
565
566 return 0;
567 }
568 EXPORT_SYMBOL(ib_init_ah_from_path);
569
570 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
571 {
572 unsigned long flags;
573
574 spin_lock_irqsave(&query->port->ah_lock, flags);
575 if (!query->port->sm_ah) {
576 spin_unlock_irqrestore(&query->port->ah_lock, flags);
577 return -EAGAIN;
578 }
579 kref_get(&query->port->sm_ah->ref);
580 query->sm_ah = query->port->sm_ah;
581 spin_unlock_irqrestore(&query->port->ah_lock, flags);
582
583 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
584 query->sm_ah->pkey_index,
585 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
586 gfp_mask);
587 if (IS_ERR(query->mad_buf)) {
588 kref_put(&query->sm_ah->ref, free_sm_ah);
589 return -ENOMEM;
590 }
591
592 query->mad_buf->ah = query->sm_ah->ah;
593
594 return 0;
595 }
596
597 static void free_mad(struct ib_sa_query *query)
598 {
599 ib_free_send_mad(query->mad_buf);
600 kref_put(&query->sm_ah->ref, free_sm_ah);
601 }
602
603 static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
604 {
605 unsigned long flags;
606
607 memset(mad, 0, sizeof *mad);
608
609 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
610 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
611 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
612
613 spin_lock_irqsave(&tid_lock, flags);
614 mad->mad_hdr.tid =
615 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
616 spin_unlock_irqrestore(&tid_lock, flags);
617 }
618
619 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
620 {
621 bool preload = gfp_mask & __GFP_WAIT;
622 unsigned long flags;
623 int ret, id;
624
625 if (preload)
626 idr_preload(gfp_mask);
627 spin_lock_irqsave(&idr_lock, flags);
628
629 id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
630
631 spin_unlock_irqrestore(&idr_lock, flags);
632 if (preload)
633 idr_preload_end();
634 if (id < 0)
635 return id;
636
637 query->mad_buf->timeout_ms = timeout_ms;
638 query->mad_buf->context[0] = query;
639 query->id = id;
640
641 ret = ib_post_send_mad(query->mad_buf, NULL);
642 if (ret) {
643 spin_lock_irqsave(&idr_lock, flags);
644 idr_remove(&query_idr, id);
645 spin_unlock_irqrestore(&idr_lock, flags);
646 }
647
648 /*
649 * It's not safe to dereference query any more, because the
650 * send may already have completed and freed the query in
651 * another context.
652 */
653 return ret ? ret : id;
654 }
655
656 void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec)
657 {
658 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
659 }
660 EXPORT_SYMBOL(ib_sa_unpack_path);
661
662 void ib_sa_pack_path(struct ib_sa_path_rec *rec, void *attribute)
663 {
664 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
665 }
666 EXPORT_SYMBOL(ib_sa_pack_path);
667
668 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
669 int status,
670 struct ib_sa_mad *mad)
671 {
672 struct ib_sa_path_query *query =
673 container_of(sa_query, struct ib_sa_path_query, sa_query);
674
675 if (mad) {
676 struct ib_sa_path_rec rec;
677
678 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
679 mad->data, &rec);
680 rec.vlan_id = 0xffff;
681 memset(rec.dmac, 0, ETH_ALEN);
682 memset(rec.smac, 0, ETH_ALEN);
683 query->callback(status, &rec, query->context);
684 } else
685 query->callback(status, NULL, query->context);
686 }
687
688 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
689 {
690 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
691 }
692
693 /**
694 * ib_sa_path_rec_get - Start a Path get query
695 * @client:SA client
696 * @device:device to send query on
697 * @port_num: port number to send query on
698 * @rec:Path Record to send in query
699 * @comp_mask:component mask to send in query
700 * @timeout_ms:time to wait for response
701 * @gfp_mask:GFP mask to use for internal allocations
702 * @callback:function called when query completes, times out or is
703 * canceled
704 * @context:opaque user context passed to callback
705 * @sa_query:query context, used to cancel query
706 *
707 * Send a Path Record Get query to the SA to look up a path. The
708 * callback function will be called when the query completes (or
709 * fails); status is 0 for a successful response, -EINTR if the query
710 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
711 * occurred sending the query. The resp parameter of the callback is
712 * only valid if status is 0.
713 *
714 * If the return value of ib_sa_path_rec_get() is negative, it is an
715 * error code. Otherwise it is a query ID that can be used to cancel
716 * the query.
717 */
718 int ib_sa_path_rec_get(struct ib_sa_client *client,
719 struct ib_device *device, u8 port_num,
720 struct ib_sa_path_rec *rec,
721 ib_sa_comp_mask comp_mask,
722 int timeout_ms, gfp_t gfp_mask,
723 void (*callback)(int status,
724 struct ib_sa_path_rec *resp,
725 void *context),
726 void *context,
727 struct ib_sa_query **sa_query)
728 {
729 struct ib_sa_path_query *query;
730 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
731 struct ib_sa_port *port;
732 struct ib_mad_agent *agent;
733 struct ib_sa_mad *mad;
734 int ret;
735
736 if (!sa_dev)
737 return -ENODEV;
738
739 port = &sa_dev->port[port_num - sa_dev->start_port];
740 agent = port->agent;
741
742 query = kmalloc(sizeof *query, gfp_mask);
743 if (!query)
744 return -ENOMEM;
745
746 query->sa_query.port = port;
747 ret = alloc_mad(&query->sa_query, gfp_mask);
748 if (ret)
749 goto err1;
750
751 ib_sa_client_get(client);
752 query->sa_query.client = client;
753 query->callback = callback;
754 query->context = context;
755
756 mad = query->sa_query.mad_buf->mad;
757 init_mad(mad, agent);
758
759 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
760 query->sa_query.release = ib_sa_path_rec_release;
761 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
762 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
763 mad->sa_hdr.comp_mask = comp_mask;
764
765 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
766
767 *sa_query = &query->sa_query;
768
769 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
770 if (ret < 0)
771 goto err2;
772
773 return ret;
774
775 err2:
776 *sa_query = NULL;
777 ib_sa_client_put(query->sa_query.client);
778 free_mad(&query->sa_query);
779
780 err1:
781 kfree(query);
782 return ret;
783 }
784 EXPORT_SYMBOL(ib_sa_path_rec_get);
785
786 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
787 int status,
788 struct ib_sa_mad *mad)
789 {
790 struct ib_sa_service_query *query =
791 container_of(sa_query, struct ib_sa_service_query, sa_query);
792
793 if (mad) {
794 struct ib_sa_service_rec rec;
795
796 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
797 mad->data, &rec);
798 query->callback(status, &rec, query->context);
799 } else
800 query->callback(status, NULL, query->context);
801 }
802
803 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
804 {
805 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
806 }
807
808 /**
809 * ib_sa_service_rec_query - Start Service Record operation
810 * @client:SA client
811 * @device:device to send request on
812 * @port_num: port number to send request on
813 * @method:SA method - should be get, set, or delete
814 * @rec:Service Record to send in request
815 * @comp_mask:component mask to send in request
816 * @timeout_ms:time to wait for response
817 * @gfp_mask:GFP mask to use for internal allocations
818 * @callback:function called when request completes, times out or is
819 * canceled
820 * @context:opaque user context passed to callback
821 * @sa_query:request context, used to cancel request
822 *
823 * Send a Service Record set/get/delete to the SA to register,
824 * unregister or query a service record.
825 * The callback function will be called when the request completes (or
826 * fails); status is 0 for a successful response, -EINTR if the query
827 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
828 * occurred sending the query. The resp parameter of the callback is
829 * only valid if status is 0.
830 *
831 * If the return value of ib_sa_service_rec_query() is negative, it is an
832 * error code. Otherwise it is a request ID that can be used to cancel
833 * the query.
834 */
835 int ib_sa_service_rec_query(struct ib_sa_client *client,
836 struct ib_device *device, u8 port_num, u8 method,
837 struct ib_sa_service_rec *rec,
838 ib_sa_comp_mask comp_mask,
839 int timeout_ms, gfp_t gfp_mask,
840 void (*callback)(int status,
841 struct ib_sa_service_rec *resp,
842 void *context),
843 void *context,
844 struct ib_sa_query **sa_query)
845 {
846 struct ib_sa_service_query *query;
847 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
848 struct ib_sa_port *port;
849 struct ib_mad_agent *agent;
850 struct ib_sa_mad *mad;
851 int ret;
852
853 if (!sa_dev)
854 return -ENODEV;
855
856 port = &sa_dev->port[port_num - sa_dev->start_port];
857 agent = port->agent;
858
859 if (method != IB_MGMT_METHOD_GET &&
860 method != IB_MGMT_METHOD_SET &&
861 method != IB_SA_METHOD_DELETE)
862 return -EINVAL;
863
864 query = kmalloc(sizeof *query, gfp_mask);
865 if (!query)
866 return -ENOMEM;
867
868 query->sa_query.port = port;
869 ret = alloc_mad(&query->sa_query, gfp_mask);
870 if (ret)
871 goto err1;
872
873 ib_sa_client_get(client);
874 query->sa_query.client = client;
875 query->callback = callback;
876 query->context = context;
877
878 mad = query->sa_query.mad_buf->mad;
879 init_mad(mad, agent);
880
881 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
882 query->sa_query.release = ib_sa_service_rec_release;
883 mad->mad_hdr.method = method;
884 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
885 mad->sa_hdr.comp_mask = comp_mask;
886
887 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
888 rec, mad->data);
889
890 *sa_query = &query->sa_query;
891
892 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
893 if (ret < 0)
894 goto err2;
895
896 return ret;
897
898 err2:
899 *sa_query = NULL;
900 ib_sa_client_put(query->sa_query.client);
901 free_mad(&query->sa_query);
902
903 err1:
904 kfree(query);
905 return ret;
906 }
907 EXPORT_SYMBOL(ib_sa_service_rec_query);
908
909 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
910 int status,
911 struct ib_sa_mad *mad)
912 {
913 struct ib_sa_mcmember_query *query =
914 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
915
916 if (mad) {
917 struct ib_sa_mcmember_rec rec;
918
919 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
920 mad->data, &rec);
921 query->callback(status, &rec, query->context);
922 } else
923 query->callback(status, NULL, query->context);
924 }
925
926 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
927 {
928 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
929 }
930
931 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
932 struct ib_device *device, u8 port_num,
933 u8 method,
934 struct ib_sa_mcmember_rec *rec,
935 ib_sa_comp_mask comp_mask,
936 int timeout_ms, gfp_t gfp_mask,
937 void (*callback)(int status,
938 struct ib_sa_mcmember_rec *resp,
939 void *context),
940 void *context,
941 struct ib_sa_query **sa_query)
942 {
943 struct ib_sa_mcmember_query *query;
944 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
945 struct ib_sa_port *port;
946 struct ib_mad_agent *agent;
947 struct ib_sa_mad *mad;
948 int ret;
949
950 if (!sa_dev)
951 return -ENODEV;
952
953 port = &sa_dev->port[port_num - sa_dev->start_port];
954 agent = port->agent;
955
956 query = kmalloc(sizeof *query, gfp_mask);
957 if (!query)
958 return -ENOMEM;
959
960 query->sa_query.port = port;
961 ret = alloc_mad(&query->sa_query, gfp_mask);
962 if (ret)
963 goto err1;
964
965 ib_sa_client_get(client);
966 query->sa_query.client = client;
967 query->callback = callback;
968 query->context = context;
969
970 mad = query->sa_query.mad_buf->mad;
971 init_mad(mad, agent);
972
973 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
974 query->sa_query.release = ib_sa_mcmember_rec_release;
975 mad->mad_hdr.method = method;
976 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
977 mad->sa_hdr.comp_mask = comp_mask;
978
979 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
980 rec, mad->data);
981
982 *sa_query = &query->sa_query;
983
984 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
985 if (ret < 0)
986 goto err2;
987
988 return ret;
989
990 err2:
991 *sa_query = NULL;
992 ib_sa_client_put(query->sa_query.client);
993 free_mad(&query->sa_query);
994
995 err1:
996 kfree(query);
997 return ret;
998 }
999
1000 /* Support GuidInfoRecord */
1001 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1002 int status,
1003 struct ib_sa_mad *mad)
1004 {
1005 struct ib_sa_guidinfo_query *query =
1006 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1007
1008 if (mad) {
1009 struct ib_sa_guidinfo_rec rec;
1010
1011 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1012 mad->data, &rec);
1013 query->callback(status, &rec, query->context);
1014 } else
1015 query->callback(status, NULL, query->context);
1016 }
1017
1018 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1019 {
1020 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1021 }
1022
1023 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1024 struct ib_device *device, u8 port_num,
1025 struct ib_sa_guidinfo_rec *rec,
1026 ib_sa_comp_mask comp_mask, u8 method,
1027 int timeout_ms, gfp_t gfp_mask,
1028 void (*callback)(int status,
1029 struct ib_sa_guidinfo_rec *resp,
1030 void *context),
1031 void *context,
1032 struct ib_sa_query **sa_query)
1033 {
1034 struct ib_sa_guidinfo_query *query;
1035 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1036 struct ib_sa_port *port;
1037 struct ib_mad_agent *agent;
1038 struct ib_sa_mad *mad;
1039 int ret;
1040
1041 if (!sa_dev)
1042 return -ENODEV;
1043
1044 if (method != IB_MGMT_METHOD_GET &&
1045 method != IB_MGMT_METHOD_SET &&
1046 method != IB_SA_METHOD_DELETE) {
1047 return -EINVAL;
1048 }
1049
1050 port = &sa_dev->port[port_num - sa_dev->start_port];
1051 agent = port->agent;
1052
1053 query = kmalloc(sizeof *query, gfp_mask);
1054 if (!query)
1055 return -ENOMEM;
1056
1057 query->sa_query.port = port;
1058 ret = alloc_mad(&query->sa_query, gfp_mask);
1059 if (ret)
1060 goto err1;
1061
1062 ib_sa_client_get(client);
1063 query->sa_query.client = client;
1064 query->callback = callback;
1065 query->context = context;
1066
1067 mad = query->sa_query.mad_buf->mad;
1068 init_mad(mad, agent);
1069
1070 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1071 query->sa_query.release = ib_sa_guidinfo_rec_release;
1072
1073 mad->mad_hdr.method = method;
1074 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1075 mad->sa_hdr.comp_mask = comp_mask;
1076
1077 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1078 mad->data);
1079
1080 *sa_query = &query->sa_query;
1081
1082 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1083 if (ret < 0)
1084 goto err2;
1085
1086 return ret;
1087
1088 err2:
1089 *sa_query = NULL;
1090 ib_sa_client_put(query->sa_query.client);
1091 free_mad(&query->sa_query);
1092
1093 err1:
1094 kfree(query);
1095 return ret;
1096 }
1097 EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
1098
1099 static void send_handler(struct ib_mad_agent *agent,
1100 struct ib_mad_send_wc *mad_send_wc)
1101 {
1102 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
1103 unsigned long flags;
1104
1105 if (query->callback)
1106 switch (mad_send_wc->status) {
1107 case IB_WC_SUCCESS:
1108 /* No callback -- already got recv */
1109 break;
1110 case IB_WC_RESP_TIMEOUT_ERR:
1111 query->callback(query, -ETIMEDOUT, NULL);
1112 break;
1113 case IB_WC_WR_FLUSH_ERR:
1114 query->callback(query, -EINTR, NULL);
1115 break;
1116 default:
1117 query->callback(query, -EIO, NULL);
1118 break;
1119 }
1120
1121 spin_lock_irqsave(&idr_lock, flags);
1122 idr_remove(&query_idr, query->id);
1123 spin_unlock_irqrestore(&idr_lock, flags);
1124
1125 free_mad(query);
1126 ib_sa_client_put(query->client);
1127 query->release(query);
1128 }
1129
1130 static void recv_handler(struct ib_mad_agent *mad_agent,
1131 struct ib_mad_recv_wc *mad_recv_wc)
1132 {
1133 struct ib_sa_query *query;
1134 struct ib_mad_send_buf *mad_buf;
1135
1136 mad_buf = (void *) (unsigned long) mad_recv_wc->wc->wr_id;
1137 query = mad_buf->context[0];
1138
1139 if (query->callback) {
1140 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
1141 query->callback(query,
1142 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
1143 -EINVAL : 0,
1144 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
1145 else
1146 query->callback(query, -EIO, NULL);
1147 }
1148
1149 ib_free_recv_mad(mad_recv_wc);
1150 }
1151
1152 static void ib_sa_add_one(struct ib_device *device)
1153 {
1154 struct ib_sa_device *sa_dev;
1155 int s, e, i;
1156
1157 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1158 return;
1159
1160 if (device->node_type == RDMA_NODE_IB_SWITCH)
1161 s = e = 0;
1162 else {
1163 s = 1;
1164 e = device->phys_port_cnt;
1165 }
1166
1167 sa_dev = kzalloc(sizeof *sa_dev +
1168 (e - s + 1) * sizeof (struct ib_sa_port),
1169 GFP_KERNEL);
1170 if (!sa_dev)
1171 return;
1172
1173 sa_dev->start_port = s;
1174 sa_dev->end_port = e;
1175
1176 for (i = 0; i <= e - s; ++i) {
1177 spin_lock_init(&sa_dev->port[i].ah_lock);
1178 if (rdma_port_get_link_layer(device, i + 1) != IB_LINK_LAYER_INFINIBAND)
1179 continue;
1180
1181 sa_dev->port[i].sm_ah = NULL;
1182 sa_dev->port[i].port_num = i + s;
1183
1184 sa_dev->port[i].agent =
1185 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
1186 NULL, 0, send_handler,
1187 recv_handler, sa_dev);
1188 if (IS_ERR(sa_dev->port[i].agent))
1189 goto err;
1190
1191 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
1192 }
1193
1194 ib_set_client_data(device, &sa_client, sa_dev);
1195
1196 /*
1197 * We register our event handler after everything is set up,
1198 * and then update our cached info after the event handler is
1199 * registered to avoid any problems if a port changes state
1200 * during our initialization.
1201 */
1202
1203 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
1204 if (ib_register_event_handler(&sa_dev->event_handler))
1205 goto err;
1206
1207 for (i = 0; i <= e - s; ++i)
1208 if (rdma_port_get_link_layer(device, i + 1) == IB_LINK_LAYER_INFINIBAND)
1209 update_sm_ah(&sa_dev->port[i].update_task);
1210
1211 return;
1212
1213 err:
1214 while (--i >= 0)
1215 if (rdma_port_get_link_layer(device, i + 1) == IB_LINK_LAYER_INFINIBAND)
1216 ib_unregister_mad_agent(sa_dev->port[i].agent);
1217
1218 kfree(sa_dev);
1219
1220 return;
1221 }
1222
1223 static void ib_sa_remove_one(struct ib_device *device)
1224 {
1225 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1226 int i;
1227
1228 if (!sa_dev)
1229 return;
1230
1231 ib_unregister_event_handler(&sa_dev->event_handler);
1232
1233 flush_workqueue(ib_wq);
1234
1235 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
1236 if (rdma_port_get_link_layer(device, i + 1) == IB_LINK_LAYER_INFINIBAND) {
1237 ib_unregister_mad_agent(sa_dev->port[i].agent);
1238 if (sa_dev->port[i].sm_ah)
1239 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
1240 }
1241
1242 }
1243
1244 kfree(sa_dev);
1245 }
1246
1247 static int __init ib_sa_init(void)
1248 {
1249 int ret;
1250
1251 get_random_bytes(&tid, sizeof tid);
1252
1253 ret = ib_register_client(&sa_client);
1254 if (ret) {
1255 printk(KERN_ERR "Couldn't register ib_sa client\n");
1256 goto err1;
1257 }
1258
1259 ret = mcast_init();
1260 if (ret) {
1261 printk(KERN_ERR "Couldn't initialize multicast handling\n");
1262 goto err2;
1263 }
1264
1265 return 0;
1266 err2:
1267 ib_unregister_client(&sa_client);
1268 err1:
1269 return ret;
1270 }
1271
1272 static void __exit ib_sa_cleanup(void)
1273 {
1274 mcast_cleanup();
1275 ib_unregister_client(&sa_client);
1276 idr_destroy(&query_idr);
1277 }
1278
1279 module_init(ib_sa_init);
1280 module_exit(ib_sa_cleanup);
Linux with added FPC-III support