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Linux 2.6.17.7
[linux/fpc-iii.git] / drivers / infiniband / core / sa_query.c
blob501cc054cb3b150d8af4bd3c1c6d0196560ffb65
1 /*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Voltaire, Inc.  All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 *
33 * $Id: sa_query.c 2811 2005-07-06 18:11:43Z halr $
34 */
35
36 #include <linux/module.h>
37 #include <linux/init.h>
38 #include <linux/err.h>
39 #include <linux/random.h>
40 #include <linux/spinlock.h>
41 #include <linux/slab.h>
42 #include <linux/pci.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_sa.h>
50
51 MODULE_AUTHOR("Roland Dreier");
52 MODULE_DESCRIPTION("InfiniBand subnet administration query support");
53 MODULE_LICENSE("Dual BSD/GPL");
54
55 struct ib_sa_sm_ah {
56 struct ib_ah *ah;
57 struct kref ref;
58 };
59
60 struct ib_sa_port {
61 struct ib_mad_agent *agent;
62 struct ib_sa_sm_ah *sm_ah;
63 struct work_struct update_task;
64 spinlock_t ah_lock;
65 u8 port_num;
66 };
67
68 struct ib_sa_device {
69 int start_port, end_port;
70 struct ib_event_handler event_handler;
71 struct ib_sa_port port[0];
72 };
73
74 struct ib_sa_query {
75 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
76 void (*release)(struct ib_sa_query *);
77 struct ib_sa_port *port;
78 struct ib_mad_send_buf *mad_buf;
79 struct ib_sa_sm_ah *sm_ah;
80 int id;
81 };
82
83 struct ib_sa_service_query {
84 void (*callback)(int, struct ib_sa_service_rec *, void *);
85 void *context;
86 struct ib_sa_query sa_query;
87 };
88
89 struct ib_sa_path_query {
90 void (*callback)(int, struct ib_sa_path_rec *, void *);
91 void *context;
92 struct ib_sa_query sa_query;
93 };
94
95 struct ib_sa_mcmember_query {
96 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
97 void *context;
98 struct ib_sa_query sa_query;
99 };
100
101 static void ib_sa_add_one(struct ib_device *device);
102 static void ib_sa_remove_one(struct ib_device *device);
103
104 static struct ib_client sa_client = {
105 .name = "sa",
106 .add = ib_sa_add_one,
107 .remove = ib_sa_remove_one
108 };
109
110 static spinlock_t idr_lock;
111 static DEFINE_IDR(query_idr);
112
113 static spinlock_t tid_lock;
114 static u32 tid;
115
116 #define PATH_REC_FIELD(field) \
117 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
118 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
119 .field_name = "sa_path_rec:" #field
120
121 static const struct ib_field path_rec_table[] = {
122 { RESERVED,
123 .offset_words = 0,
124 .offset_bits = 0,
125 .size_bits = 32 },
126 { RESERVED,
127 .offset_words = 1,
128 .offset_bits = 0,
129 .size_bits = 32 },
130 { PATH_REC_FIELD(dgid),
131 .offset_words = 2,
132 .offset_bits = 0,
133 .size_bits = 128 },
134 { PATH_REC_FIELD(sgid),
135 .offset_words = 6,
136 .offset_bits = 0,
137 .size_bits = 128 },
138 { PATH_REC_FIELD(dlid),
139 .offset_words = 10,
140 .offset_bits = 0,
141 .size_bits = 16 },
142 { PATH_REC_FIELD(slid),
143 .offset_words = 10,
144 .offset_bits = 16,
145 .size_bits = 16 },
146 { PATH_REC_FIELD(raw_traffic),
147 .offset_words = 11,
148 .offset_bits = 0,
149 .size_bits = 1 },
150 { RESERVED,
151 .offset_words = 11,
152 .offset_bits = 1,
153 .size_bits = 3 },
154 { PATH_REC_FIELD(flow_label),
155 .offset_words = 11,
156 .offset_bits = 4,
157 .size_bits = 20 },
158 { PATH_REC_FIELD(hop_limit),
159 .offset_words = 11,
160 .offset_bits = 24,
161 .size_bits = 8 },
162 { PATH_REC_FIELD(traffic_class),
163 .offset_words = 12,
164 .offset_bits = 0,
165 .size_bits = 8 },
166 { PATH_REC_FIELD(reversible),
167 .offset_words = 12,
168 .offset_bits = 8,
169 .size_bits = 1 },
170 { PATH_REC_FIELD(numb_path),
171 .offset_words = 12,
172 .offset_bits = 9,
173 .size_bits = 7 },
174 { PATH_REC_FIELD(pkey),
175 .offset_words = 12,
176 .offset_bits = 16,
177 .size_bits = 16 },
178 { RESERVED,
179 .offset_words = 13,
180 .offset_bits = 0,
181 .size_bits = 12 },
182 { PATH_REC_FIELD(sl),
183 .offset_words = 13,
184 .offset_bits = 12,
185 .size_bits = 4 },
186 { PATH_REC_FIELD(mtu_selector),
187 .offset_words = 13,
188 .offset_bits = 16,
189 .size_bits = 2 },
190 { PATH_REC_FIELD(mtu),
191 .offset_words = 13,
192 .offset_bits = 18,
193 .size_bits = 6 },
194 { PATH_REC_FIELD(rate_selector),
195 .offset_words = 13,
196 .offset_bits = 24,
197 .size_bits = 2 },
198 { PATH_REC_FIELD(rate),
199 .offset_words = 13,
200 .offset_bits = 26,
201 .size_bits = 6 },
202 { PATH_REC_FIELD(packet_life_time_selector),
203 .offset_words = 14,
204 .offset_bits = 0,
205 .size_bits = 2 },
206 { PATH_REC_FIELD(packet_life_time),
207 .offset_words = 14,
208 .offset_bits = 2,
209 .size_bits = 6 },
210 { PATH_REC_FIELD(preference),
211 .offset_words = 14,
212 .offset_bits = 8,
213 .size_bits = 8 },
214 { RESERVED,
215 .offset_words = 14,
216 .offset_bits = 16,
217 .size_bits = 48 },
218 };
219
220 #define MCMEMBER_REC_FIELD(field) \
221 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
222 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
223 .field_name = "sa_mcmember_rec:" #field
224
225 static const struct ib_field mcmember_rec_table[] = {
226 { MCMEMBER_REC_FIELD(mgid),
227 .offset_words = 0,
228 .offset_bits = 0,
229 .size_bits = 128 },
230 { MCMEMBER_REC_FIELD(port_gid),
231 .offset_words = 4,
232 .offset_bits = 0,
233 .size_bits = 128 },
234 { MCMEMBER_REC_FIELD(qkey),
235 .offset_words = 8,
236 .offset_bits = 0,
237 .size_bits = 32 },
238 { MCMEMBER_REC_FIELD(mlid),
239 .offset_words = 9,
240 .offset_bits = 0,
241 .size_bits = 16 },
242 { MCMEMBER_REC_FIELD(mtu_selector),
243 .offset_words = 9,
244 .offset_bits = 16,
245 .size_bits = 2 },
246 { MCMEMBER_REC_FIELD(mtu),
247 .offset_words = 9,
248 .offset_bits = 18,
249 .size_bits = 6 },
250 { MCMEMBER_REC_FIELD(traffic_class),
251 .offset_words = 9,
252 .offset_bits = 24,
253 .size_bits = 8 },
254 { MCMEMBER_REC_FIELD(pkey),
255 .offset_words = 10,
256 .offset_bits = 0,
257 .size_bits = 16 },
258 { MCMEMBER_REC_FIELD(rate_selector),
259 .offset_words = 10,
260 .offset_bits = 16,
261 .size_bits = 2 },
262 { MCMEMBER_REC_FIELD(rate),
263 .offset_words = 10,
264 .offset_bits = 18,
265 .size_bits = 6 },
266 { MCMEMBER_REC_FIELD(packet_life_time_selector),
267 .offset_words = 10,
268 .offset_bits = 24,
269 .size_bits = 2 },
270 { MCMEMBER_REC_FIELD(packet_life_time),
271 .offset_words = 10,
272 .offset_bits = 26,
273 .size_bits = 6 },
274 { MCMEMBER_REC_FIELD(sl),
275 .offset_words = 11,
276 .offset_bits = 0,
277 .size_bits = 4 },
278 { MCMEMBER_REC_FIELD(flow_label),
279 .offset_words = 11,
280 .offset_bits = 4,
281 .size_bits = 20 },
282 { MCMEMBER_REC_FIELD(hop_limit),
283 .offset_words = 11,
284 .offset_bits = 24,
285 .size_bits = 8 },
286 { MCMEMBER_REC_FIELD(scope),
287 .offset_words = 12,
288 .offset_bits = 0,
289 .size_bits = 4 },
290 { MCMEMBER_REC_FIELD(join_state),
291 .offset_words = 12,
292 .offset_bits = 4,
293 .size_bits = 4 },
294 { MCMEMBER_REC_FIELD(proxy_join),
295 .offset_words = 12,
296 .offset_bits = 8,
297 .size_bits = 1 },
298 { RESERVED,
299 .offset_words = 12,
300 .offset_bits = 9,
301 .size_bits = 23 },
302 };
303
304 #define SERVICE_REC_FIELD(field) \
305 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
306 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
307 .field_name = "sa_service_rec:" #field
308
309 static const struct ib_field service_rec_table[] = {
310 { SERVICE_REC_FIELD(id),
311 .offset_words = 0,
312 .offset_bits = 0,
313 .size_bits = 64 },
314 { SERVICE_REC_FIELD(gid),
315 .offset_words = 2,
316 .offset_bits = 0,
317 .size_bits = 128 },
318 { SERVICE_REC_FIELD(pkey),
319 .offset_words = 6,
320 .offset_bits = 0,
321 .size_bits = 16 },
322 { SERVICE_REC_FIELD(lease),
323 .offset_words = 7,
324 .offset_bits = 0,
325 .size_bits = 32 },
326 { SERVICE_REC_FIELD(key),
327 .offset_words = 8,
328 .offset_bits = 0,
329 .size_bits = 128 },
330 { SERVICE_REC_FIELD(name),
331 .offset_words = 12,
332 .offset_bits = 0,
333 .size_bits = 64*8 },
334 { SERVICE_REC_FIELD(data8),
335 .offset_words = 28,
336 .offset_bits = 0,
337 .size_bits = 16*8 },
338 { SERVICE_REC_FIELD(data16),
339 .offset_words = 32,
340 .offset_bits = 0,
341 .size_bits = 8*16 },
342 { SERVICE_REC_FIELD(data32),
343 .offset_words = 36,
344 .offset_bits = 0,
345 .size_bits = 4*32 },
346 { SERVICE_REC_FIELD(data64),
347 .offset_words = 40,
348 .offset_bits = 0,
349 .size_bits = 2*64 },
350 };
351
352 static void free_sm_ah(struct kref *kref)
353 {
354 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
355
356 ib_destroy_ah(sm_ah->ah);
357 kfree(sm_ah);
358 }
359
360 static void update_sm_ah(void *port_ptr)
361 {
362 struct ib_sa_port *port = port_ptr;
363 struct ib_sa_sm_ah *new_ah, *old_ah;
364 struct ib_port_attr port_attr;
365 struct ib_ah_attr ah_attr;
366
367 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
368 printk(KERN_WARNING "Couldn't query port\n");
369 return;
370 }
371
372 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
373 if (!new_ah) {
374 printk(KERN_WARNING "Couldn't allocate new SM AH\n");
375 return;
376 }
377
378 kref_init(&new_ah->ref);
379
380 memset(&ah_attr, 0, sizeof ah_attr);
381 ah_attr.dlid = port_attr.sm_lid;
382 ah_attr.sl = port_attr.sm_sl;
383 ah_attr.port_num = port->port_num;
384
385 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
386 if (IS_ERR(new_ah->ah)) {
387 printk(KERN_WARNING "Couldn't create new SM AH\n");
388 kfree(new_ah);
389 return;
390 }
391
392 spin_lock_irq(&port->ah_lock);
393 old_ah = port->sm_ah;
394 port->sm_ah = new_ah;
395 spin_unlock_irq(&port->ah_lock);
396
397 if (old_ah)
398 kref_put(&old_ah->ref, free_sm_ah);
399 }
400
401 static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
402 {
403 if (event->event == IB_EVENT_PORT_ERR ||
404 event->event == IB_EVENT_PORT_ACTIVE ||
405 event->event == IB_EVENT_LID_CHANGE ||
406 event->event == IB_EVENT_PKEY_CHANGE ||
407 event->event == IB_EVENT_SM_CHANGE) {
408 struct ib_sa_device *sa_dev;
409 sa_dev = container_of(handler, typeof(*sa_dev), event_handler);
410
411 schedule_work(&sa_dev->port[event->element.port_num -
412 sa_dev->start_port].update_task);
413 }
414 }
415
416 /**
417 * ib_sa_cancel_query - try to cancel an SA query
418 * @id:ID of query to cancel
419 * @query:query pointer to cancel
420 *
421 * Try to cancel an SA query. If the id and query don't match up or
422 * the query has already completed, nothing is done. Otherwise the
423 * query is canceled and will complete with a status of -EINTR.
424 */
425 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
426 {
427 unsigned long flags;
428 struct ib_mad_agent *agent;
429 struct ib_mad_send_buf *mad_buf;
430
431 spin_lock_irqsave(&idr_lock, flags);
432 if (idr_find(&query_idr, id) != query) {
433 spin_unlock_irqrestore(&idr_lock, flags);
434 return;
435 }
436 agent = query->port->agent;
437 mad_buf = query->mad_buf;
438 spin_unlock_irqrestore(&idr_lock, flags);
439
440 ib_cancel_mad(agent, mad_buf);
441 }
442 EXPORT_SYMBOL(ib_sa_cancel_query);
443
444 static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
445 {
446 unsigned long flags;
447
448 memset(mad, 0, sizeof *mad);
449
450 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
451 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
452 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
453
454 spin_lock_irqsave(&tid_lock, flags);
455 mad->mad_hdr.tid =
456 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
457 spin_unlock_irqrestore(&tid_lock, flags);
458 }
459
460 static int send_mad(struct ib_sa_query *query, int timeout_ms)
461 {
462 unsigned long flags;
463 int ret, id;
464
465 retry:
466 if (!idr_pre_get(&query_idr, GFP_ATOMIC))
467 return -ENOMEM;
468 spin_lock_irqsave(&idr_lock, flags);
469 ret = idr_get_new(&query_idr, query, &id);
470 spin_unlock_irqrestore(&idr_lock, flags);
471 if (ret == -EAGAIN)
472 goto retry;
473 if (ret)
474 return ret;
475
476 query->mad_buf->timeout_ms = timeout_ms;
477 query->mad_buf->context[0] = query;
478 query->id = id;
479
480 spin_lock_irqsave(&query->port->ah_lock, flags);
481 kref_get(&query->port->sm_ah->ref);
482 query->sm_ah = query->port->sm_ah;
483 spin_unlock_irqrestore(&query->port->ah_lock, flags);
484
485 query->mad_buf->ah = query->sm_ah->ah;
486
487 ret = ib_post_send_mad(query->mad_buf, NULL);
488 if (ret) {
489 spin_lock_irqsave(&idr_lock, flags);
490 idr_remove(&query_idr, id);
491 spin_unlock_irqrestore(&idr_lock, flags);
492
493 kref_put(&query->sm_ah->ref, free_sm_ah);
494 }
495
496 /*
497 * It's not safe to dereference query any more, because the
498 * send may already have completed and freed the query in
499 * another context.
500 */
501 return ret ? ret : id;
502 }
503
504 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
505 int status,
506 struct ib_sa_mad *mad)
507 {
508 struct ib_sa_path_query *query =
509 container_of(sa_query, struct ib_sa_path_query, sa_query);
510
511 if (mad) {
512 struct ib_sa_path_rec rec;
513
514 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
515 mad->data, &rec);
516 query->callback(status, &rec, query->context);
517 } else
518 query->callback(status, NULL, query->context);
519 }
520
521 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
522 {
523 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
524 }
525
526 /**
527 * ib_sa_path_rec_get - Start a Path get query
528 * @device:device to send query on
529 * @port_num: port number to send query on
530 * @rec:Path Record to send in query
531 * @comp_mask:component mask to send in query
532 * @timeout_ms:time to wait for response
533 * @gfp_mask:GFP mask to use for internal allocations
534 * @callback:function called when query completes, times out or is
535 * canceled
536 * @context:opaque user context passed to callback
537 * @sa_query:query context, used to cancel query
538 *
539 * Send a Path Record Get query to the SA to look up a path. The
540 * callback function will be called when the query completes (or
541 * fails); status is 0 for a successful response, -EINTR if the query
542 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
543 * occurred sending the query. The resp parameter of the callback is
544 * only valid if status is 0.
545 *
546 * If the return value of ib_sa_path_rec_get() is negative, it is an
547 * error code. Otherwise it is a query ID that can be used to cancel
548 * the query.
549 */
550 int ib_sa_path_rec_get(struct ib_device *device, u8 port_num,
551 struct ib_sa_path_rec *rec,
552 ib_sa_comp_mask comp_mask,
553 int timeout_ms, gfp_t gfp_mask,
554 void (*callback)(int status,
555 struct ib_sa_path_rec *resp,
556 void *context),
557 void *context,
558 struct ib_sa_query **sa_query)
559 {
560 struct ib_sa_path_query *query;
561 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
562 struct ib_sa_port *port;
563 struct ib_mad_agent *agent;
564 struct ib_sa_mad *mad;
565 int ret;
566
567 if (!sa_dev)
568 return -ENODEV;
569
570 port = &sa_dev->port[port_num - sa_dev->start_port];
571 agent = port->agent;
572
573 query = kmalloc(sizeof *query, gfp_mask);
574 if (!query)
575 return -ENOMEM;
576
577 query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0,
578 0, IB_MGMT_SA_HDR,
579 IB_MGMT_SA_DATA, gfp_mask);
580 if (!query->sa_query.mad_buf) {
581 ret = -ENOMEM;
582 goto err1;
583 }
584
585 query->callback = callback;
586 query->context = context;
587
588 mad = query->sa_query.mad_buf->mad;
589 init_mad(mad, agent);
590
591 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
592 query->sa_query.release = ib_sa_path_rec_release;
593 query->sa_query.port = port;
594 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
595 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
596 mad->sa_hdr.comp_mask = comp_mask;
597
598 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
599
600 *sa_query = &query->sa_query;
601
602 ret = send_mad(&query->sa_query, timeout_ms);
603 if (ret < 0)
604 goto err2;
605
606 return ret;
607
608 err2:
609 *sa_query = NULL;
610 ib_free_send_mad(query->sa_query.mad_buf);
611
612 err1:
613 kfree(query);
614 return ret;
615 }
616 EXPORT_SYMBOL(ib_sa_path_rec_get);
617
618 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
619 int status,
620 struct ib_sa_mad *mad)
621 {
622 struct ib_sa_service_query *query =
623 container_of(sa_query, struct ib_sa_service_query, sa_query);
624
625 if (mad) {
626 struct ib_sa_service_rec rec;
627
628 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
629 mad->data, &rec);
630 query->callback(status, &rec, query->context);
631 } else
632 query->callback(status, NULL, query->context);
633 }
634
635 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
636 {
637 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
638 }
639
640 /**
641 * ib_sa_service_rec_query - Start Service Record operation
642 * @device:device to send request on
643 * @port_num: port number to send request on
644 * @method:SA method - should be get, set, or delete
645 * @rec:Service Record to send in request
646 * @comp_mask:component mask to send in request
647 * @timeout_ms:time to wait for response
648 * @gfp_mask:GFP mask to use for internal allocations
649 * @callback:function called when request completes, times out or is
650 * canceled
651 * @context:opaque user context passed to callback
652 * @sa_query:request context, used to cancel request
653 *
654 * Send a Service Record set/get/delete to the SA to register,
655 * unregister or query a service record.
656 * The callback function will be called when the request completes (or
657 * fails); status is 0 for a successful response, -EINTR if the query
658 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
659 * occurred sending the query. The resp parameter of the callback is
660 * only valid if status is 0.
661 *
662 * If the return value of ib_sa_service_rec_query() is negative, it is an
663 * error code. Otherwise it is a request ID that can be used to cancel
664 * the query.
665 */
666 int ib_sa_service_rec_query(struct ib_device *device, u8 port_num, u8 method,
667 struct ib_sa_service_rec *rec,
668 ib_sa_comp_mask comp_mask,
669 int timeout_ms, gfp_t gfp_mask,
670 void (*callback)(int status,
671 struct ib_sa_service_rec *resp,
672 void *context),
673 void *context,
674 struct ib_sa_query **sa_query)
675 {
676 struct ib_sa_service_query *query;
677 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
678 struct ib_sa_port *port;
679 struct ib_mad_agent *agent;
680 struct ib_sa_mad *mad;
681 int ret;
682
683 if (!sa_dev)
684 return -ENODEV;
685
686 port = &sa_dev->port[port_num - sa_dev->start_port];
687 agent = port->agent;
688
689 if (method != IB_MGMT_METHOD_GET &&
690 method != IB_MGMT_METHOD_SET &&
691 method != IB_SA_METHOD_DELETE)
692 return -EINVAL;
693
694 query = kmalloc(sizeof *query, gfp_mask);
695 if (!query)
696 return -ENOMEM;
697
698 query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0,
699 0, IB_MGMT_SA_HDR,
700 IB_MGMT_SA_DATA, gfp_mask);
701 if (!query->sa_query.mad_buf) {
702 ret = -ENOMEM;
703 goto err1;
704 }
705
706 query->callback = callback;
707 query->context = context;
708
709 mad = query->sa_query.mad_buf->mad;
710 init_mad(mad, agent);
711
712 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
713 query->sa_query.release = ib_sa_service_rec_release;
714 query->sa_query.port = port;
715 mad->mad_hdr.method = method;
716 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
717 mad->sa_hdr.comp_mask = comp_mask;
718
719 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
720 rec, mad->data);
721
722 *sa_query = &query->sa_query;
723
724 ret = send_mad(&query->sa_query, timeout_ms);
725 if (ret < 0)
726 goto err2;
727
728 return ret;
729
730 err2:
731 *sa_query = NULL;
732 ib_free_send_mad(query->sa_query.mad_buf);
733
734 err1:
735 kfree(query);
736 return ret;
737 }
738 EXPORT_SYMBOL(ib_sa_service_rec_query);
739
740 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
741 int status,
742 struct ib_sa_mad *mad)
743 {
744 struct ib_sa_mcmember_query *query =
745 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
746
747 if (mad) {
748 struct ib_sa_mcmember_rec rec;
749
750 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
751 mad->data, &rec);
752 query->callback(status, &rec, query->context);
753 } else
754 query->callback(status, NULL, query->context);
755 }
756
757 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
758 {
759 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
760 }
761
762 int ib_sa_mcmember_rec_query(struct ib_device *device, u8 port_num,
763 u8 method,
764 struct ib_sa_mcmember_rec *rec,
765 ib_sa_comp_mask comp_mask,
766 int timeout_ms, gfp_t gfp_mask,
767 void (*callback)(int status,
768 struct ib_sa_mcmember_rec *resp,
769 void *context),
770 void *context,
771 struct ib_sa_query **sa_query)
772 {
773 struct ib_sa_mcmember_query *query;
774 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
775 struct ib_sa_port *port;
776 struct ib_mad_agent *agent;
777 struct ib_sa_mad *mad;
778 int ret;
779
780 if (!sa_dev)
781 return -ENODEV;
782
783 port = &sa_dev->port[port_num - sa_dev->start_port];
784 agent = port->agent;
785
786 query = kmalloc(sizeof *query, gfp_mask);
787 if (!query)
788 return -ENOMEM;
789
790 query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0,
791 0, IB_MGMT_SA_HDR,
792 IB_MGMT_SA_DATA, gfp_mask);
793 if (!query->sa_query.mad_buf) {
794 ret = -ENOMEM;
795 goto err1;
796 }
797
798 query->callback = callback;
799 query->context = context;
800
801 mad = query->sa_query.mad_buf->mad;
802 init_mad(mad, agent);
803
804 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
805 query->sa_query.release = ib_sa_mcmember_rec_release;
806 query->sa_query.port = port;
807 mad->mad_hdr.method = method;
808 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
809 mad->sa_hdr.comp_mask = comp_mask;
810
811 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
812 rec, mad->data);
813
814 *sa_query = &query->sa_query;
815
816 ret = send_mad(&query->sa_query, timeout_ms);
817 if (ret < 0)
818 goto err2;
819
820 return ret;
821
822 err2:
823 *sa_query = NULL;
824 ib_free_send_mad(query->sa_query.mad_buf);
825
826 err1:
827 kfree(query);
828 return ret;
829 }
830 EXPORT_SYMBOL(ib_sa_mcmember_rec_query);
831
832 static void send_handler(struct ib_mad_agent *agent,
833 struct ib_mad_send_wc *mad_send_wc)
834 {
835 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
836 unsigned long flags;
837
838 if (query->callback)
839 switch (mad_send_wc->status) {
840 case IB_WC_SUCCESS:
841 /* No callback -- already got recv */
842 break;
843 case IB_WC_RESP_TIMEOUT_ERR:
844 query->callback(query, -ETIMEDOUT, NULL);
845 break;
846 case IB_WC_WR_FLUSH_ERR:
847 query->callback(query, -EINTR, NULL);
848 break;
849 default:
850 query->callback(query, -EIO, NULL);
851 break;
852 }
853
854 spin_lock_irqsave(&idr_lock, flags);
855 idr_remove(&query_idr, query->id);
856 spin_unlock_irqrestore(&idr_lock, flags);
857
858 ib_free_send_mad(mad_send_wc->send_buf);
859 kref_put(&query->sm_ah->ref, free_sm_ah);
860 query->release(query);
861 }
862
863 static void recv_handler(struct ib_mad_agent *mad_agent,
864 struct ib_mad_recv_wc *mad_recv_wc)
865 {
866 struct ib_sa_query *query;
867 struct ib_mad_send_buf *mad_buf;
868
869 mad_buf = (void *) (unsigned long) mad_recv_wc->wc->wr_id;
870 query = mad_buf->context[0];
871
872 if (query->callback) {
873 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
874 query->callback(query,
875 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
876 -EINVAL : 0,
877 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
878 else
879 query->callback(query, -EIO, NULL);
880 }
881
882 ib_free_recv_mad(mad_recv_wc);
883 }
884
885 static void ib_sa_add_one(struct ib_device *device)
886 {
887 struct ib_sa_device *sa_dev;
888 int s, e, i;
889
890 if (device->node_type == IB_NODE_SWITCH)
891 s = e = 0;
892 else {
893 s = 1;
894 e = device->phys_port_cnt;
895 }
896
897 sa_dev = kmalloc(sizeof *sa_dev +
898 (e - s + 1) * sizeof (struct ib_sa_port),
899 GFP_KERNEL);
900 if (!sa_dev)
901 return;
902
903 sa_dev->start_port = s;
904 sa_dev->end_port = e;
905
906 for (i = 0; i <= e - s; ++i) {
907 sa_dev->port[i].sm_ah = NULL;
908 sa_dev->port[i].port_num = i + s;
909 spin_lock_init(&sa_dev->port[i].ah_lock);
910
911 sa_dev->port[i].agent =
912 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
913 NULL, 0, send_handler,
914 recv_handler, sa_dev);
915 if (IS_ERR(sa_dev->port[i].agent))
916 goto err;
917
918 INIT_WORK(&sa_dev->port[i].update_task,
919 update_sm_ah, &sa_dev->port[i]);
920 }
921
922 ib_set_client_data(device, &sa_client, sa_dev);
923
924 /*
925 * We register our event handler after everything is set up,
926 * and then update our cached info after the event handler is
927 * registered to avoid any problems if a port changes state
928 * during our initialization.
929 */
930
931 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
932 if (ib_register_event_handler(&sa_dev->event_handler))
933 goto err;
934
935 for (i = 0; i <= e - s; ++i)
936 update_sm_ah(&sa_dev->port[i]);
937
938 return;
939
940 err:
941 while (--i >= 0)
942 ib_unregister_mad_agent(sa_dev->port[i].agent);
943
944 kfree(sa_dev);
945
946 return;
947 }
948
949 static void ib_sa_remove_one(struct ib_device *device)
950 {
951 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
952 int i;
953
954 if (!sa_dev)
955 return;
956
957 ib_unregister_event_handler(&sa_dev->event_handler);
958
959 flush_scheduled_work();
960
961 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
962 ib_unregister_mad_agent(sa_dev->port[i].agent);
963 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
964 }
965
966 kfree(sa_dev);
967 }
968
969 static int __init ib_sa_init(void)
970 {
971 int ret;
972
973 spin_lock_init(&idr_lock);
974 spin_lock_init(&tid_lock);
975
976 get_random_bytes(&tid, sizeof tid);
977
978 ret = ib_register_client(&sa_client);
979 if (ret)
980 printk(KERN_ERR "Couldn't register ib_sa client\n");
981
982 return ret;
983 }
984
985 static void __exit ib_sa_cleanup(void)
986 {
987 ib_unregister_client(&sa_client);
988 idr_destroy(&query_idr);
989 }
990
991 module_init(ib_sa_init);
992 module_exit(ib_sa_cleanup);
Linux with added FPC-III support