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net/vlan: Provide read access to the vlan egress map
[deliverable/linux.git] / drivers / infiniband / core / sa_query.c
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
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 return 0;
560 }
561 EXPORT_SYMBOL(ib_init_ah_from_path);
562
563 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
564 {
565 unsigned long flags;
566
567 spin_lock_irqsave(&query->port->ah_lock, flags);
568 if (!query->port->sm_ah) {
569 spin_unlock_irqrestore(&query->port->ah_lock, flags);
570 return -EAGAIN;
571 }
572 kref_get(&query->port->sm_ah->ref);
573 query->sm_ah = query->port->sm_ah;
574 spin_unlock_irqrestore(&query->port->ah_lock, flags);
575
576 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
577 query->sm_ah->pkey_index,
578 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
579 gfp_mask);
580 if (IS_ERR(query->mad_buf)) {
581 kref_put(&query->sm_ah->ref, free_sm_ah);
582 return -ENOMEM;
583 }
584
585 query->mad_buf->ah = query->sm_ah->ah;
586
587 return 0;
588 }
589
590 static void free_mad(struct ib_sa_query *query)
591 {
592 ib_free_send_mad(query->mad_buf);
593 kref_put(&query->sm_ah->ref, free_sm_ah);
594 }
595
596 static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
597 {
598 unsigned long flags;
599
600 memset(mad, 0, sizeof *mad);
601
602 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
603 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
604 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
605
606 spin_lock_irqsave(&tid_lock, flags);
607 mad->mad_hdr.tid =
608 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
609 spin_unlock_irqrestore(&tid_lock, flags);
610 }
611
612 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
613 {
614 bool preload = gfp_mask & __GFP_WAIT;
615 unsigned long flags;
616 int ret, id;
617
618 if (preload)
619 idr_preload(gfp_mask);
620 spin_lock_irqsave(&idr_lock, flags);
621
622 id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
623
624 spin_unlock_irqrestore(&idr_lock, flags);
625 if (preload)
626 idr_preload_end();
627 if (id < 0)
628 return id;
629
630 query->mad_buf->timeout_ms = timeout_ms;
631 query->mad_buf->context[0] = query;
632 query->id = id;
633
634 ret = ib_post_send_mad(query->mad_buf, NULL);
635 if (ret) {
636 spin_lock_irqsave(&idr_lock, flags);
637 idr_remove(&query_idr, id);
638 spin_unlock_irqrestore(&idr_lock, flags);
639 }
640
641 /*
642 * It's not safe to dereference query any more, because the
643 * send may already have completed and freed the query in
644 * another context.
645 */
646 return ret ? ret : id;
647 }
648
649 void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec)
650 {
651 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
652 }
653 EXPORT_SYMBOL(ib_sa_unpack_path);
654
655 void ib_sa_pack_path(struct ib_sa_path_rec *rec, void *attribute)
656 {
657 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
658 }
659 EXPORT_SYMBOL(ib_sa_pack_path);
660
661 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
662 int status,
663 struct ib_sa_mad *mad)
664 {
665 struct ib_sa_path_query *query =
666 container_of(sa_query, struct ib_sa_path_query, sa_query);
667
668 if (mad) {
669 struct ib_sa_path_rec rec;
670
671 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
672 mad->data, &rec);
673 query->callback(status, &rec, query->context);
674 } else
675 query->callback(status, NULL, query->context);
676 }
677
678 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
679 {
680 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
681 }
682
683 /**
684 * ib_sa_path_rec_get - Start a Path get query
685 * @client:SA client
686 * @device:device to send query on
687 * @port_num: port number to send query on
688 * @rec:Path Record to send in query
689 * @comp_mask:component mask to send in query
690 * @timeout_ms:time to wait for response
691 * @gfp_mask:GFP mask to use for internal allocations
692 * @callback:function called when query completes, times out or is
693 * canceled
694 * @context:opaque user context passed to callback
695 * @sa_query:query context, used to cancel query
696 *
697 * Send a Path Record Get query to the SA to look up a path. The
698 * callback function will be called when the query completes (or
699 * fails); status is 0 for a successful response, -EINTR if the query
700 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
701 * occurred sending the query. The resp parameter of the callback is
702 * only valid if status is 0.
703 *
704 * If the return value of ib_sa_path_rec_get() is negative, it is an
705 * error code. Otherwise it is a query ID that can be used to cancel
706 * the query.
707 */
708 int ib_sa_path_rec_get(struct ib_sa_client *client,
709 struct ib_device *device, u8 port_num,
710 struct ib_sa_path_rec *rec,
711 ib_sa_comp_mask comp_mask,
712 int timeout_ms, gfp_t gfp_mask,
713 void (*callback)(int status,
714 struct ib_sa_path_rec *resp,
715 void *context),
716 void *context,
717 struct ib_sa_query **sa_query)
718 {
719 struct ib_sa_path_query *query;
720 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
721 struct ib_sa_port *port;
722 struct ib_mad_agent *agent;
723 struct ib_sa_mad *mad;
724 int ret;
725
726 if (!sa_dev)
727 return -ENODEV;
728
729 port = &sa_dev->port[port_num - sa_dev->start_port];
730 agent = port->agent;
731
732 query = kmalloc(sizeof *query, gfp_mask);
733 if (!query)
734 return -ENOMEM;
735
736 query->sa_query.port = port;
737 ret = alloc_mad(&query->sa_query, gfp_mask);
738 if (ret)
739 goto err1;
740
741 ib_sa_client_get(client);
742 query->sa_query.client = client;
743 query->callback = callback;
744 query->context = context;
745
746 mad = query->sa_query.mad_buf->mad;
747 init_mad(mad, agent);
748
749 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
750 query->sa_query.release = ib_sa_path_rec_release;
751 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
752 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
753 mad->sa_hdr.comp_mask = comp_mask;
754
755 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
756
757 *sa_query = &query->sa_query;
758
759 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
760 if (ret < 0)
761 goto err2;
762
763 return ret;
764
765 err2:
766 *sa_query = NULL;
767 ib_sa_client_put(query->sa_query.client);
768 free_mad(&query->sa_query);
769
770 err1:
771 kfree(query);
772 return ret;
773 }
774 EXPORT_SYMBOL(ib_sa_path_rec_get);
775
776 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
777 int status,
778 struct ib_sa_mad *mad)
779 {
780 struct ib_sa_service_query *query =
781 container_of(sa_query, struct ib_sa_service_query, sa_query);
782
783 if (mad) {
784 struct ib_sa_service_rec rec;
785
786 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
787 mad->data, &rec);
788 query->callback(status, &rec, query->context);
789 } else
790 query->callback(status, NULL, query->context);
791 }
792
793 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
794 {
795 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
796 }
797
798 /**
799 * ib_sa_service_rec_query - Start Service Record operation
800 * @client:SA client
801 * @device:device to send request on
802 * @port_num: port number to send request on
803 * @method:SA method - should be get, set, or delete
804 * @rec:Service Record to send in request
805 * @comp_mask:component mask to send in request
806 * @timeout_ms:time to wait for response
807 * @gfp_mask:GFP mask to use for internal allocations
808 * @callback:function called when request completes, times out or is
809 * canceled
810 * @context:opaque user context passed to callback
811 * @sa_query:request context, used to cancel request
812 *
813 * Send a Service Record set/get/delete to the SA to register,
814 * unregister or query a service record.
815 * The callback function will be called when the request completes (or
816 * fails); status is 0 for a successful response, -EINTR if the query
817 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
818 * occurred sending the query. The resp parameter of the callback is
819 * only valid if status is 0.
820 *
821 * If the return value of ib_sa_service_rec_query() is negative, it is an
822 * error code. Otherwise it is a request ID that can be used to cancel
823 * the query.
824 */
825 int ib_sa_service_rec_query(struct ib_sa_client *client,
826 struct ib_device *device, u8 port_num, u8 method,
827 struct ib_sa_service_rec *rec,
828 ib_sa_comp_mask comp_mask,
829 int timeout_ms, gfp_t gfp_mask,
830 void (*callback)(int status,
831 struct ib_sa_service_rec *resp,
832 void *context),
833 void *context,
834 struct ib_sa_query **sa_query)
835 {
836 struct ib_sa_service_query *query;
837 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
838 struct ib_sa_port *port;
839 struct ib_mad_agent *agent;
840 struct ib_sa_mad *mad;
841 int ret;
842
843 if (!sa_dev)
844 return -ENODEV;
845
846 port = &sa_dev->port[port_num - sa_dev->start_port];
847 agent = port->agent;
848
849 if (method != IB_MGMT_METHOD_GET &&
850 method != IB_MGMT_METHOD_SET &&
851 method != IB_SA_METHOD_DELETE)
852 return -EINVAL;
853
854 query = kmalloc(sizeof *query, gfp_mask);
855 if (!query)
856 return -ENOMEM;
857
858 query->sa_query.port = port;
859 ret = alloc_mad(&query->sa_query, gfp_mask);
860 if (ret)
861 goto err1;
862
863 ib_sa_client_get(client);
864 query->sa_query.client = client;
865 query->callback = callback;
866 query->context = context;
867
868 mad = query->sa_query.mad_buf->mad;
869 init_mad(mad, agent);
870
871 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
872 query->sa_query.release = ib_sa_service_rec_release;
873 mad->mad_hdr.method = method;
874 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
875 mad->sa_hdr.comp_mask = comp_mask;
876
877 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
878 rec, mad->data);
879
880 *sa_query = &query->sa_query;
881
882 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
883 if (ret < 0)
884 goto err2;
885
886 return ret;
887
888 err2:
889 *sa_query = NULL;
890 ib_sa_client_put(query->sa_query.client);
891 free_mad(&query->sa_query);
892
893 err1:
894 kfree(query);
895 return ret;
896 }
897 EXPORT_SYMBOL(ib_sa_service_rec_query);
898
899 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
900 int status,
901 struct ib_sa_mad *mad)
902 {
903 struct ib_sa_mcmember_query *query =
904 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
905
906 if (mad) {
907 struct ib_sa_mcmember_rec rec;
908
909 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
910 mad->data, &rec);
911 query->callback(status, &rec, query->context);
912 } else
913 query->callback(status, NULL, query->context);
914 }
915
916 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
917 {
918 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
919 }
920
921 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
922 struct ib_device *device, u8 port_num,
923 u8 method,
924 struct ib_sa_mcmember_rec *rec,
925 ib_sa_comp_mask comp_mask,
926 int timeout_ms, gfp_t gfp_mask,
927 void (*callback)(int status,
928 struct ib_sa_mcmember_rec *resp,
929 void *context),
930 void *context,
931 struct ib_sa_query **sa_query)
932 {
933 struct ib_sa_mcmember_query *query;
934 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
935 struct ib_sa_port *port;
936 struct ib_mad_agent *agent;
937 struct ib_sa_mad *mad;
938 int ret;
939
940 if (!sa_dev)
941 return -ENODEV;
942
943 port = &sa_dev->port[port_num - sa_dev->start_port];
944 agent = port->agent;
945
946 query = kmalloc(sizeof *query, gfp_mask);
947 if (!query)
948 return -ENOMEM;
949
950 query->sa_query.port = port;
951 ret = alloc_mad(&query->sa_query, gfp_mask);
952 if (ret)
953 goto err1;
954
955 ib_sa_client_get(client);
956 query->sa_query.client = client;
957 query->callback = callback;
958 query->context = context;
959
960 mad = query->sa_query.mad_buf->mad;
961 init_mad(mad, agent);
962
963 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
964 query->sa_query.release = ib_sa_mcmember_rec_release;
965 mad->mad_hdr.method = method;
966 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
967 mad->sa_hdr.comp_mask = comp_mask;
968
969 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
970 rec, mad->data);
971
972 *sa_query = &query->sa_query;
973
974 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
975 if (ret < 0)
976 goto err2;
977
978 return ret;
979
980 err2:
981 *sa_query = NULL;
982 ib_sa_client_put(query->sa_query.client);
983 free_mad(&query->sa_query);
984
985 err1:
986 kfree(query);
987 return ret;
988 }
989
990 /* Support GuidInfoRecord */
991 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
992 int status,
993 struct ib_sa_mad *mad)
994 {
995 struct ib_sa_guidinfo_query *query =
996 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
997
998 if (mad) {
999 struct ib_sa_guidinfo_rec rec;
1000
1001 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1002 mad->data, &rec);
1003 query->callback(status, &rec, query->context);
1004 } else
1005 query->callback(status, NULL, query->context);
1006 }
1007
1008 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1009 {
1010 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1011 }
1012
1013 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1014 struct ib_device *device, u8 port_num,
1015 struct ib_sa_guidinfo_rec *rec,
1016 ib_sa_comp_mask comp_mask, u8 method,
1017 int timeout_ms, gfp_t gfp_mask,
1018 void (*callback)(int status,
1019 struct ib_sa_guidinfo_rec *resp,
1020 void *context),
1021 void *context,
1022 struct ib_sa_query **sa_query)
1023 {
1024 struct ib_sa_guidinfo_query *query;
1025 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1026 struct ib_sa_port *port;
1027 struct ib_mad_agent *agent;
1028 struct ib_sa_mad *mad;
1029 int ret;
1030
1031 if (!sa_dev)
1032 return -ENODEV;
1033
1034 if (method != IB_MGMT_METHOD_GET &&
1035 method != IB_MGMT_METHOD_SET &&
1036 method != IB_SA_METHOD_DELETE) {
1037 return -EINVAL;
1038 }
1039
1040 port = &sa_dev->port[port_num - sa_dev->start_port];
1041 agent = port->agent;
1042
1043 query = kmalloc(sizeof *query, gfp_mask);
1044 if (!query)
1045 return -ENOMEM;
1046
1047 query->sa_query.port = port;
1048 ret = alloc_mad(&query->sa_query, gfp_mask);
1049 if (ret)
1050 goto err1;
1051
1052 ib_sa_client_get(client);
1053 query->sa_query.client = client;
1054 query->callback = callback;
1055 query->context = context;
1056
1057 mad = query->sa_query.mad_buf->mad;
1058 init_mad(mad, agent);
1059
1060 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1061 query->sa_query.release = ib_sa_guidinfo_rec_release;
1062
1063 mad->mad_hdr.method = method;
1064 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1065 mad->sa_hdr.comp_mask = comp_mask;
1066
1067 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1068 mad->data);
1069
1070 *sa_query = &query->sa_query;
1071
1072 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1073 if (ret < 0)
1074 goto err2;
1075
1076 return ret;
1077
1078 err2:
1079 *sa_query = NULL;
1080 ib_sa_client_put(query->sa_query.client);
1081 free_mad(&query->sa_query);
1082
1083 err1:
1084 kfree(query);
1085 return ret;
1086 }
1087 EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
1088
1089 static void send_handler(struct ib_mad_agent *agent,
1090 struct ib_mad_send_wc *mad_send_wc)
1091 {
1092 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
1093 unsigned long flags;
1094
1095 if (query->callback)
1096 switch (mad_send_wc->status) {
1097 case IB_WC_SUCCESS:
1098 /* No callback -- already got recv */
1099 break;
1100 case IB_WC_RESP_TIMEOUT_ERR:
1101 query->callback(query, -ETIMEDOUT, NULL);
1102 break;
1103 case IB_WC_WR_FLUSH_ERR:
1104 query->callback(query, -EINTR, NULL);
1105 break;
1106 default:
1107 query->callback(query, -EIO, NULL);
1108 break;
1109 }
1110
1111 spin_lock_irqsave(&idr_lock, flags);
1112 idr_remove(&query_idr, query->id);
1113 spin_unlock_irqrestore(&idr_lock, flags);
1114
1115 free_mad(query);
1116 ib_sa_client_put(query->client);
1117 query->release(query);
1118 }
1119
1120 static void recv_handler(struct ib_mad_agent *mad_agent,
1121 struct ib_mad_recv_wc *mad_recv_wc)
1122 {
1123 struct ib_sa_query *query;
1124 struct ib_mad_send_buf *mad_buf;
1125
1126 mad_buf = (void *) (unsigned long) mad_recv_wc->wc->wr_id;
1127 query = mad_buf->context[0];
1128
1129 if (query->callback) {
1130 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
1131 query->callback(query,
1132 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
1133 -EINVAL : 0,
1134 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
1135 else
1136 query->callback(query, -EIO, NULL);
1137 }
1138
1139 ib_free_recv_mad(mad_recv_wc);
1140 }
1141
1142 static void ib_sa_add_one(struct ib_device *device)
1143 {
1144 struct ib_sa_device *sa_dev;
1145 int s, e, i;
1146
1147 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1148 return;
1149
1150 if (device->node_type == RDMA_NODE_IB_SWITCH)
1151 s = e = 0;
1152 else {
1153 s = 1;
1154 e = device->phys_port_cnt;
1155 }
1156
1157 sa_dev = kzalloc(sizeof *sa_dev +
1158 (e - s + 1) * sizeof (struct ib_sa_port),
1159 GFP_KERNEL);
1160 if (!sa_dev)
1161 return;
1162
1163 sa_dev->start_port = s;
1164 sa_dev->end_port = e;
1165
1166 for (i = 0; i <= e - s; ++i) {
1167 spin_lock_init(&sa_dev->port[i].ah_lock);
1168 if (rdma_port_get_link_layer(device, i + 1) != IB_LINK_LAYER_INFINIBAND)
1169 continue;
1170
1171 sa_dev->port[i].sm_ah = NULL;
1172 sa_dev->port[i].port_num = i + s;
1173
1174 sa_dev->port[i].agent =
1175 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
1176 NULL, 0, send_handler,
1177 recv_handler, sa_dev);
1178 if (IS_ERR(sa_dev->port[i].agent))
1179 goto err;
1180
1181 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
1182 }
1183
1184 ib_set_client_data(device, &sa_client, sa_dev);
1185
1186 /*
1187 * We register our event handler after everything is set up,
1188 * and then update our cached info after the event handler is
1189 * registered to avoid any problems if a port changes state
1190 * during our initialization.
1191 */
1192
1193 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
1194 if (ib_register_event_handler(&sa_dev->event_handler))
1195 goto err;
1196
1197 for (i = 0; i <= e - s; ++i)
1198 if (rdma_port_get_link_layer(device, i + 1) == IB_LINK_LAYER_INFINIBAND)
1199 update_sm_ah(&sa_dev->port[i].update_task);
1200
1201 return;
1202
1203 err:
1204 while (--i >= 0)
1205 if (rdma_port_get_link_layer(device, i + 1) == IB_LINK_LAYER_INFINIBAND)
1206 ib_unregister_mad_agent(sa_dev->port[i].agent);
1207
1208 kfree(sa_dev);
1209
1210 return;
1211 }
1212
1213 static void ib_sa_remove_one(struct ib_device *device)
1214 {
1215 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1216 int i;
1217
1218 if (!sa_dev)
1219 return;
1220
1221 ib_unregister_event_handler(&sa_dev->event_handler);
1222
1223 flush_workqueue(ib_wq);
1224
1225 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
1226 if (rdma_port_get_link_layer(device, i + 1) == IB_LINK_LAYER_INFINIBAND) {
1227 ib_unregister_mad_agent(sa_dev->port[i].agent);
1228 if (sa_dev->port[i].sm_ah)
1229 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
1230 }
1231
1232 }
1233
1234 kfree(sa_dev);
1235 }
1236
1237 static int __init ib_sa_init(void)
1238 {
1239 int ret;
1240
1241 get_random_bytes(&tid, sizeof tid);
1242
1243 ret = ib_register_client(&sa_client);
1244 if (ret) {
1245 printk(KERN_ERR "Couldn't register ib_sa client\n");
1246 goto err1;
1247 }
1248
1249 ret = mcast_init();
1250 if (ret) {
1251 printk(KERN_ERR "Couldn't initialize multicast handling\n");
1252 goto err2;
1253 }
1254
1255 return 0;
1256 err2:
1257 ib_unregister_client(&sa_client);
1258 err1:
1259 return ret;
1260 }
1261
1262 static void __exit ib_sa_cleanup(void)
1263 {
1264 mcast_cleanup();
1265 ib_unregister_client(&sa_client);
1266 idr_destroy(&query_idr);
1267 }
1268
1269 module_init(ib_sa_init);
1270 module_exit(ib_sa_cleanup);
Linux kernel - Deliverables
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