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Complete the renaming to TuxOnIce with function names, vars etc.
[linux-2.6/suspend2-head.git] / drivers / infiniband / core / sa_query.c
blob20ab6b3e484d517f29a21fa316f51e01681b30c7
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 * $Id: sa_query.c 2811 2005-07-06 18:11:43Z halr $
35 */
36
37 #include <linux/module.h>
38 #include <linux/init.h>
39 #include <linux/err.h>
40 #include <linux/random.h>
41 #include <linux/spinlock.h>
42 #include <linux/slab.h>
43 #include <linux/dma-mapping.h>
44 #include <linux/kref.h>
45 #include <linux/idr.h>
46 #include <linux/workqueue.h>
47
48 #include <rdma/ib_pack.h>
49 #include <rdma/ib_cache.h>
50 #include "sa.h"
51
52 MODULE_AUTHOR("Roland Dreier");
53 MODULE_DESCRIPTION("InfiniBand subnet administration query support");
54 MODULE_LICENSE("Dual BSD/GPL");
55
56 struct ib_sa_sm_ah {
57 struct ib_ah *ah;
58 struct kref ref;
59 u16 pkey_index;
60 u8 src_path_mask;
61 };
62
63 struct ib_sa_port {
64 struct ib_mad_agent *agent;
65 struct ib_sa_sm_ah *sm_ah;
66 struct work_struct update_task;
67 spinlock_t ah_lock;
68 u8 port_num;
69 };
70
71 struct ib_sa_device {
72 int start_port, end_port;
73 struct ib_event_handler event_handler;
74 struct ib_sa_port port[0];
75 };
76
77 struct ib_sa_query {
78 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
79 void (*release)(struct ib_sa_query *);
80 struct ib_sa_client *client;
81 struct ib_sa_port *port;
82 struct ib_mad_send_buf *mad_buf;
83 struct ib_sa_sm_ah *sm_ah;
84 int id;
85 };
86
87 struct ib_sa_service_query {
88 void (*callback)(int, struct ib_sa_service_rec *, void *);
89 void *context;
90 struct ib_sa_query sa_query;
91 };
92
93 struct ib_sa_path_query {
94 void (*callback)(int, struct ib_sa_path_rec *, void *);
95 void *context;
96 struct ib_sa_query sa_query;
97 };
98
99 struct ib_sa_mcmember_query {
100 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
101 void *context;
102 struct ib_sa_query sa_query;
103 };
104
105 static void ib_sa_add_one(struct ib_device *device);
106 static void ib_sa_remove_one(struct ib_device *device);
107
108 static struct ib_client sa_client = {
109 .name = "sa",
110 .add = ib_sa_add_one,
111 .remove = ib_sa_remove_one
112 };
113
114 static spinlock_t idr_lock;
115 static DEFINE_IDR(query_idr);
116
117 static spinlock_t tid_lock;
118 static u32 tid;
119
120 #define PATH_REC_FIELD(field) \
121 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
122 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
123 .field_name = "sa_path_rec:" #field
124
125 static const struct ib_field path_rec_table[] = {
126 { RESERVED,
127 .offset_words = 0,
128 .offset_bits = 0,
129 .size_bits = 32 },
130 { RESERVED,
131 .offset_words = 1,
132 .offset_bits = 0,
133 .size_bits = 32 },
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 { RESERVED,
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 static void free_sm_ah(struct kref *kref)
357 {
358 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
359
360 ib_destroy_ah(sm_ah->ah);
361 kfree(sm_ah);
362 }
363
364 static void update_sm_ah(struct work_struct *work)
365 {
366 struct ib_sa_port *port =
367 container_of(work, struct ib_sa_port, update_task);
368 struct ib_sa_sm_ah *new_ah, *old_ah;
369 struct ib_port_attr port_attr;
370 struct ib_ah_attr ah_attr;
371
372 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
373 printk(KERN_WARNING "Couldn't query port\n");
374 return;
375 }
376
377 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
378 if (!new_ah) {
379 printk(KERN_WARNING "Couldn't allocate new SM AH\n");
380 return;
381 }
382
383 kref_init(&new_ah->ref);
384 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
385
386 new_ah->pkey_index = 0;
387 if (ib_find_pkey(port->agent->device, port->port_num,
388 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index) &&
389 ib_find_pkey(port->agent->device, port->port_num,
390 IB_DEFAULT_PKEY_PARTIAL, &new_ah->pkey_index))
391 printk(KERN_ERR "Couldn't find index for default PKey\n");
392
393 memset(&ah_attr, 0, sizeof ah_attr);
394 ah_attr.dlid = port_attr.sm_lid;
395 ah_attr.sl = port_attr.sm_sl;
396 ah_attr.port_num = port->port_num;
397
398 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
399 if (IS_ERR(new_ah->ah)) {
400 printk(KERN_WARNING "Couldn't create new SM AH\n");
401 kfree(new_ah);
402 return;
403 }
404
405 spin_lock_irq(&port->ah_lock);
406 old_ah = port->sm_ah;
407 port->sm_ah = new_ah;
408 spin_unlock_irq(&port->ah_lock);
409
410 if (old_ah)
411 kref_put(&old_ah->ref, free_sm_ah);
412 }
413
414 static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
415 {
416 if (event->event == IB_EVENT_PORT_ERR ||
417 event->event == IB_EVENT_PORT_ACTIVE ||
418 event->event == IB_EVENT_LID_CHANGE ||
419 event->event == IB_EVENT_PKEY_CHANGE ||
420 event->event == IB_EVENT_SM_CHANGE ||
421 event->event == IB_EVENT_CLIENT_REREGISTER) {
422 struct ib_sa_device *sa_dev;
423 sa_dev = container_of(handler, typeof(*sa_dev), event_handler);
424
425 schedule_work(&sa_dev->port[event->element.port_num -
426 sa_dev->start_port].update_task);
427 }
428 }
429
430 void ib_sa_register_client(struct ib_sa_client *client)
431 {
432 atomic_set(&client->users, 1);
433 init_completion(&client->comp);
434 }
435 EXPORT_SYMBOL(ib_sa_register_client);
436
437 void ib_sa_unregister_client(struct ib_sa_client *client)
438 {
439 ib_sa_client_put(client);
440 wait_for_completion(&client->comp);
441 }
442 EXPORT_SYMBOL(ib_sa_unregister_client);
443
444 /**
445 * ib_sa_cancel_query - try to cancel an SA query
446 * @id:ID of query to cancel
447 * @query:query pointer to cancel
448 *
449 * Try to cancel an SA query. If the id and query don't match up or
450 * the query has already completed, nothing is done. Otherwise the
451 * query is canceled and will complete with a status of -EINTR.
452 */
453 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
454 {
455 unsigned long flags;
456 struct ib_mad_agent *agent;
457 struct ib_mad_send_buf *mad_buf;
458
459 spin_lock_irqsave(&idr_lock, flags);
460 if (idr_find(&query_idr, id) != query) {
461 spin_unlock_irqrestore(&idr_lock, flags);
462 return;
463 }
464 agent = query->port->agent;
465 mad_buf = query->mad_buf;
466 spin_unlock_irqrestore(&idr_lock, flags);
467
468 ib_cancel_mad(agent, mad_buf);
469 }
470 EXPORT_SYMBOL(ib_sa_cancel_query);
471
472 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
473 {
474 struct ib_sa_device *sa_dev;
475 struct ib_sa_port *port;
476 unsigned long flags;
477 u8 src_path_mask;
478
479 sa_dev = ib_get_client_data(device, &sa_client);
480 if (!sa_dev)
481 return 0x7f;
482
483 port = &sa_dev->port[port_num - sa_dev->start_port];
484 spin_lock_irqsave(&port->ah_lock, flags);
485 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
486 spin_unlock_irqrestore(&port->ah_lock, flags);
487
488 return src_path_mask;
489 }
490
491 int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
492 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)
493 {
494 int ret;
495 u16 gid_index;
496
497 memset(ah_attr, 0, sizeof *ah_attr);
498 ah_attr->dlid = be16_to_cpu(rec->dlid);
499 ah_attr->sl = rec->sl;
500 ah_attr->src_path_bits = be16_to_cpu(rec->slid) &
501 get_src_path_mask(device, port_num);
502 ah_attr->port_num = port_num;
503 ah_attr->static_rate = rec->rate;
504
505 if (rec->hop_limit > 1) {
506 ah_attr->ah_flags = IB_AH_GRH;
507 ah_attr->grh.dgid = rec->dgid;
508
509 ret = ib_find_cached_gid(device, &rec->sgid, &port_num,
510 &gid_index);
511 if (ret)
512 return ret;
513
514 ah_attr->grh.sgid_index = gid_index;
515 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label);
516 ah_attr->grh.hop_limit = rec->hop_limit;
517 ah_attr->grh.traffic_class = rec->traffic_class;
518 }
519 return 0;
520 }
521 EXPORT_SYMBOL(ib_init_ah_from_path);
522
523 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
524 {
525 unsigned long flags;
526
527 spin_lock_irqsave(&query->port->ah_lock, flags);
528 kref_get(&query->port->sm_ah->ref);
529 query->sm_ah = query->port->sm_ah;
530 spin_unlock_irqrestore(&query->port->ah_lock, flags);
531
532 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
533 query->sm_ah->pkey_index,
534 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
535 gfp_mask);
536 if (!query->mad_buf) {
537 kref_put(&query->sm_ah->ref, free_sm_ah);
538 return -ENOMEM;
539 }
540
541 query->mad_buf->ah = query->sm_ah->ah;
542
543 return 0;
544 }
545
546 static void free_mad(struct ib_sa_query *query)
547 {
548 ib_free_send_mad(query->mad_buf);
549 kref_put(&query->sm_ah->ref, free_sm_ah);
550 }
551
552 static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
553 {
554 unsigned long flags;
555
556 memset(mad, 0, sizeof *mad);
557
558 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
559 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
560 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
561
562 spin_lock_irqsave(&tid_lock, flags);
563 mad->mad_hdr.tid =
564 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
565 spin_unlock_irqrestore(&tid_lock, flags);
566 }
567
568 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
569 {
570 unsigned long flags;
571 int ret, id;
572
573 retry:
574 if (!idr_pre_get(&query_idr, gfp_mask))
575 return -ENOMEM;
576 spin_lock_irqsave(&idr_lock, flags);
577 ret = idr_get_new(&query_idr, query, &id);
578 spin_unlock_irqrestore(&idr_lock, flags);
579 if (ret == -EAGAIN)
580 goto retry;
581 if (ret)
582 return ret;
583
584 query->mad_buf->timeout_ms = timeout_ms;
585 query->mad_buf->context[0] = query;
586 query->id = id;
587
588 ret = ib_post_send_mad(query->mad_buf, NULL);
589 if (ret) {
590 spin_lock_irqsave(&idr_lock, flags);
591 idr_remove(&query_idr, id);
592 spin_unlock_irqrestore(&idr_lock, flags);
593 }
594
595 /*
596 * It's not safe to dereference query any more, because the
597 * send may already have completed and freed the query in
598 * another context.
599 */
600 return ret ? ret : id;
601 }
602
603 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
604 int status,
605 struct ib_sa_mad *mad)
606 {
607 struct ib_sa_path_query *query =
608 container_of(sa_query, struct ib_sa_path_query, sa_query);
609
610 if (mad) {
611 struct ib_sa_path_rec rec;
612
613 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
614 mad->data, &rec);
615 query->callback(status, &rec, query->context);
616 } else
617 query->callback(status, NULL, query->context);
618 }
619
620 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
621 {
622 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
623 }
624
625 /**
626 * ib_sa_path_rec_get - Start a Path get query
627 * @client:SA client
628 * @device:device to send query on
629 * @port_num: port number to send query on
630 * @rec:Path Record to send in query
631 * @comp_mask:component mask to send in query
632 * @timeout_ms:time to wait for response
633 * @gfp_mask:GFP mask to use for internal allocations
634 * @callback:function called when query completes, times out or is
635 * canceled
636 * @context:opaque user context passed to callback
637 * @sa_query:query context, used to cancel query
638 *
639 * Send a Path Record Get query to the SA to look up a path. The
640 * callback function will be called when the query completes (or
641 * fails); status is 0 for a successful response, -EINTR if the query
642 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
643 * occurred sending the query. The resp parameter of the callback is
644 * only valid if status is 0.
645 *
646 * If the return value of ib_sa_path_rec_get() is negative, it is an
647 * error code. Otherwise it is a query ID that can be used to cancel
648 * the query.
649 */
650 int ib_sa_path_rec_get(struct ib_sa_client *client,
651 struct ib_device *device, u8 port_num,
652 struct ib_sa_path_rec *rec,
653 ib_sa_comp_mask comp_mask,
654 int timeout_ms, gfp_t gfp_mask,
655 void (*callback)(int status,
656 struct ib_sa_path_rec *resp,
657 void *context),
658 void *context,
659 struct ib_sa_query **sa_query)
660 {
661 struct ib_sa_path_query *query;
662 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
663 struct ib_sa_port *port;
664 struct ib_mad_agent *agent;
665 struct ib_sa_mad *mad;
666 int ret;
667
668 if (!sa_dev)
669 return -ENODEV;
670
671 port = &sa_dev->port[port_num - sa_dev->start_port];
672 agent = port->agent;
673
674 query = kmalloc(sizeof *query, gfp_mask);
675 if (!query)
676 return -ENOMEM;
677
678 query->sa_query.port = port;
679 ret = alloc_mad(&query->sa_query, gfp_mask);
680 if (ret)
681 goto err1;
682
683 ib_sa_client_get(client);
684 query->sa_query.client = client;
685 query->callback = callback;
686 query->context = context;
687
688 mad = query->sa_query.mad_buf->mad;
689 init_mad(mad, agent);
690
691 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
692 query->sa_query.release = ib_sa_path_rec_release;
693 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
694 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
695 mad->sa_hdr.comp_mask = comp_mask;
696
697 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
698
699 *sa_query = &query->sa_query;
700
701 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
702 if (ret < 0)
703 goto err2;
704
705 return ret;
706
707 err2:
708 *sa_query = NULL;
709 ib_sa_client_put(query->sa_query.client);
710 free_mad(&query->sa_query);
711
712 err1:
713 kfree(query);
714 return ret;
715 }
716 EXPORT_SYMBOL(ib_sa_path_rec_get);
717
718 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
719 int status,
720 struct ib_sa_mad *mad)
721 {
722 struct ib_sa_service_query *query =
723 container_of(sa_query, struct ib_sa_service_query, sa_query);
724
725 if (mad) {
726 struct ib_sa_service_rec rec;
727
728 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
729 mad->data, &rec);
730 query->callback(status, &rec, query->context);
731 } else
732 query->callback(status, NULL, query->context);
733 }
734
735 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
736 {
737 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
738 }
739
740 /**
741 * ib_sa_service_rec_query - Start Service Record operation
742 * @client:SA client
743 * @device:device to send request on
744 * @port_num: port number to send request on
745 * @method:SA method - should be get, set, or delete
746 * @rec:Service Record to send in request
747 * @comp_mask:component mask to send in request
748 * @timeout_ms:time to wait for response
749 * @gfp_mask:GFP mask to use for internal allocations
750 * @callback:function called when request completes, times out or is
751 * canceled
752 * @context:opaque user context passed to callback
753 * @sa_query:request context, used to cancel request
754 *
755 * Send a Service Record set/get/delete to the SA to register,
756 * unregister or query a service record.
757 * The callback function will be called when the request completes (or
758 * fails); status is 0 for a successful response, -EINTR if the query
759 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
760 * occurred sending the query. The resp parameter of the callback is
761 * only valid if status is 0.
762 *
763 * If the return value of ib_sa_service_rec_query() is negative, it is an
764 * error code. Otherwise it is a request ID that can be used to cancel
765 * the query.
766 */
767 int ib_sa_service_rec_query(struct ib_sa_client *client,
768 struct ib_device *device, u8 port_num, u8 method,
769 struct ib_sa_service_rec *rec,
770 ib_sa_comp_mask comp_mask,
771 int timeout_ms, gfp_t gfp_mask,
772 void (*callback)(int status,
773 struct ib_sa_service_rec *resp,
774 void *context),
775 void *context,
776 struct ib_sa_query **sa_query)
777 {
778 struct ib_sa_service_query *query;
779 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
780 struct ib_sa_port *port;
781 struct ib_mad_agent *agent;
782 struct ib_sa_mad *mad;
783 int ret;
784
785 if (!sa_dev)
786 return -ENODEV;
787
788 port = &sa_dev->port[port_num - sa_dev->start_port];
789 agent = port->agent;
790
791 if (method != IB_MGMT_METHOD_GET &&
792 method != IB_MGMT_METHOD_SET &&
793 method != IB_SA_METHOD_DELETE)
794 return -EINVAL;
795
796 query = kmalloc(sizeof *query, gfp_mask);
797 if (!query)
798 return -ENOMEM;
799
800 query->sa_query.port = port;
801 ret = alloc_mad(&query->sa_query, gfp_mask);
802 if (ret)
803 goto err1;
804
805 ib_sa_client_get(client);
806 query->sa_query.client = client;
807 query->callback = callback;
808 query->context = context;
809
810 mad = query->sa_query.mad_buf->mad;
811 init_mad(mad, agent);
812
813 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
814 query->sa_query.release = ib_sa_service_rec_release;
815 mad->mad_hdr.method = method;
816 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
817 mad->sa_hdr.comp_mask = comp_mask;
818
819 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
820 rec, mad->data);
821
822 *sa_query = &query->sa_query;
823
824 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
825 if (ret < 0)
826 goto err2;
827
828 return ret;
829
830 err2:
831 *sa_query = NULL;
832 ib_sa_client_put(query->sa_query.client);
833 free_mad(&query->sa_query);
834
835 err1:
836 kfree(query);
837 return ret;
838 }
839 EXPORT_SYMBOL(ib_sa_service_rec_query);
840
841 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
842 int status,
843 struct ib_sa_mad *mad)
844 {
845 struct ib_sa_mcmember_query *query =
846 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
847
848 if (mad) {
849 struct ib_sa_mcmember_rec rec;
850
851 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
852 mad->data, &rec);
853 query->callback(status, &rec, query->context);
854 } else
855 query->callback(status, NULL, query->context);
856 }
857
858 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
859 {
860 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
861 }
862
863 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
864 struct ib_device *device, u8 port_num,
865 u8 method,
866 struct ib_sa_mcmember_rec *rec,
867 ib_sa_comp_mask comp_mask,
868 int timeout_ms, gfp_t gfp_mask,
869 void (*callback)(int status,
870 struct ib_sa_mcmember_rec *resp,
871 void *context),
872 void *context,
873 struct ib_sa_query **sa_query)
874 {
875 struct ib_sa_mcmember_query *query;
876 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
877 struct ib_sa_port *port;
878 struct ib_mad_agent *agent;
879 struct ib_sa_mad *mad;
880 int ret;
881
882 if (!sa_dev)
883 return -ENODEV;
884
885 port = &sa_dev->port[port_num - sa_dev->start_port];
886 agent = port->agent;
887
888 query = kmalloc(sizeof *query, gfp_mask);
889 if (!query)
890 return -ENOMEM;
891
892 query->sa_query.port = port;
893 ret = alloc_mad(&query->sa_query, gfp_mask);
894 if (ret)
895 goto err1;
896
897 ib_sa_client_get(client);
898 query->sa_query.client = client;
899 query->callback = callback;
900 query->context = context;
901
902 mad = query->sa_query.mad_buf->mad;
903 init_mad(mad, agent);
904
905 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
906 query->sa_query.release = ib_sa_mcmember_rec_release;
907 mad->mad_hdr.method = method;
908 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
909 mad->sa_hdr.comp_mask = comp_mask;
910
911 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
912 rec, mad->data);
913
914 *sa_query = &query->sa_query;
915
916 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
917 if (ret < 0)
918 goto err2;
919
920 return ret;
921
922 err2:
923 *sa_query = NULL;
924 ib_sa_client_put(query->sa_query.client);
925 free_mad(&query->sa_query);
926
927 err1:
928 kfree(query);
929 return ret;
930 }
931
932 static void send_handler(struct ib_mad_agent *agent,
933 struct ib_mad_send_wc *mad_send_wc)
934 {
935 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
936 unsigned long flags;
937
938 if (query->callback)
939 switch (mad_send_wc->status) {
940 case IB_WC_SUCCESS:
941 /* No callback -- already got recv */
942 break;
943 case IB_WC_RESP_TIMEOUT_ERR:
944 query->callback(query, -ETIMEDOUT, NULL);
945 break;
946 case IB_WC_WR_FLUSH_ERR:
947 query->callback(query, -EINTR, NULL);
948 break;
949 default:
950 query->callback(query, -EIO, NULL);
951 break;
952 }
953
954 spin_lock_irqsave(&idr_lock, flags);
955 idr_remove(&query_idr, query->id);
956 spin_unlock_irqrestore(&idr_lock, flags);
957
958 free_mad(query);
959 ib_sa_client_put(query->client);
960 query->release(query);
961 }
962
963 static void recv_handler(struct ib_mad_agent *mad_agent,
964 struct ib_mad_recv_wc *mad_recv_wc)
965 {
966 struct ib_sa_query *query;
967 struct ib_mad_send_buf *mad_buf;
968
969 mad_buf = (void *) (unsigned long) mad_recv_wc->wc->wr_id;
970 query = mad_buf->context[0];
971
972 if (query->callback) {
973 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
974 query->callback(query,
975 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
976 -EINVAL : 0,
977 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
978 else
979 query->callback(query, -EIO, NULL);
980 }
981
982 ib_free_recv_mad(mad_recv_wc);
983 }
984
985 static void ib_sa_add_one(struct ib_device *device)
986 {
987 struct ib_sa_device *sa_dev;
988 int s, e, i;
989
990 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
991 return;
992
993 if (device->node_type == RDMA_NODE_IB_SWITCH)
994 s = e = 0;
995 else {
996 s = 1;
997 e = device->phys_port_cnt;
998 }
999
1000 sa_dev = kmalloc(sizeof *sa_dev +
1001 (e - s + 1) * sizeof (struct ib_sa_port),
1002 GFP_KERNEL);
1003 if (!sa_dev)
1004 return;
1005
1006 sa_dev->start_port = s;
1007 sa_dev->end_port = e;
1008
1009 for (i = 0; i <= e - s; ++i) {
1010 sa_dev->port[i].sm_ah = NULL;
1011 sa_dev->port[i].port_num = i + s;
1012 spin_lock_init(&sa_dev->port[i].ah_lock);
1013
1014 sa_dev->port[i].agent =
1015 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
1016 NULL, 0, send_handler,
1017 recv_handler, sa_dev);
1018 if (IS_ERR(sa_dev->port[i].agent))
1019 goto err;
1020
1021 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
1022 }
1023
1024 ib_set_client_data(device, &sa_client, sa_dev);
1025
1026 /*
1027 * We register our event handler after everything is set up,
1028 * and then update our cached info after the event handler is
1029 * registered to avoid any problems if a port changes state
1030 * during our initialization.
1031 */
1032
1033 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
1034 if (ib_register_event_handler(&sa_dev->event_handler))
1035 goto err;
1036
1037 for (i = 0; i <= e - s; ++i)
1038 update_sm_ah(&sa_dev->port[i].update_task);
1039
1040 return;
1041
1042 err:
1043 while (--i >= 0)
1044 ib_unregister_mad_agent(sa_dev->port[i].agent);
1045
1046 kfree(sa_dev);
1047
1048 return;
1049 }
1050
1051 static void ib_sa_remove_one(struct ib_device *device)
1052 {
1053 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1054 int i;
1055
1056 if (!sa_dev)
1057 return;
1058
1059 ib_unregister_event_handler(&sa_dev->event_handler);
1060
1061 flush_scheduled_work();
1062
1063 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
1064 ib_unregister_mad_agent(sa_dev->port[i].agent);
1065 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
1066 }
1067
1068 kfree(sa_dev);
1069 }
1070
1071 static int __init ib_sa_init(void)
1072 {
1073 int ret;
1074
1075 spin_lock_init(&idr_lock);
1076 spin_lock_init(&tid_lock);
1077
1078 get_random_bytes(&tid, sizeof tid);
1079
1080 ret = ib_register_client(&sa_client);
1081 if (ret) {
1082 printk(KERN_ERR "Couldn't register ib_sa client\n");
1083 goto err1;
1084 }
1085
1086 ret = mcast_init();
1087 if (ret) {
1088 printk(KERN_ERR "Couldn't initialize multicast handling\n");
1089 goto err2;
1090 }
1091
1092 return 0;
1093 err2:
1094 ib_unregister_client(&sa_client);
1095 err1:
1096 return ret;
1097 }
1098
1099 static void __exit ib_sa_cleanup(void)
1100 {
1101 mcast_cleanup();
1102 ib_unregister_client(&sa_client);
1103 idr_destroy(&query_idr);
1104 }
1105
1106 module_init(ib_sa_init);
1107 module_exit(ib_sa_cleanup);
Software Suspend 2 for Linus's 2.6 head (mirror)