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[net-next-2.6.git] / drivers / infiniband / core / sa_query.c
CommitLineData
1da177e4
LT		 1/*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
2a1d9b7f 3 * Copyright (c) 2005 Voltaire, Inc.  All rights reserved.
1da177e4
LT		 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 *
cbae32c5 33 * $Id: sa_query.c 2811 2005-07-06 18:11:43Z halr $
1da177e4
LT		 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>
4e57b681 46#include <linux/workqueue.h>
1da177e4 47
a4d61e84
RD		 48#include <rdma/ib_pack.h>
49#include <rdma/ib_sa.h>
6d969a47 50#include <rdma/ib_cache.h>
1da177e4
LT		 51
52MODULE_AUTHOR("Roland Dreier");
53MODULE_DESCRIPTION("InfiniBand subnet administration query support");
54MODULE_LICENSE("Dual BSD/GPL");
55
1da177e4
LT		 56struct ib_sa_sm_ah {
57 struct ib_ah *ah;
58 struct kref ref;
59};
60
61struct ib_sa_port {
62 struct ib_mad_agent *agent;
1da177e4
LT		 63 struct ib_sa_sm_ah *sm_ah;
64 struct work_struct update_task;
65 spinlock_t ah_lock;
66 u8 port_num;
67};
68
69struct ib_sa_device {
70 int start_port, end_port;
71 struct ib_event_handler event_handler;
72 struct ib_sa_port port[0];
73};
74
75struct ib_sa_query {
76 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
77 void (*release)(struct ib_sa_query *);
34816ad9
SH		 78 struct ib_sa_port *port;
79 struct ib_mad_send_buf *mad_buf;
80 struct ib_sa_sm_ah *sm_ah;
81 int id;
1da177e4
LT		 82};
83
cbae32c5
HR		 84struct ib_sa_service_query {
85 void (*callback)(int, struct ib_sa_service_rec *, void *);
86 void *context;
87 struct ib_sa_query sa_query;
88};
89
1da177e4
LT		 90struct ib_sa_path_query {
91 void (*callback)(int, struct ib_sa_path_rec *, void *);
92 void *context;
93 struct ib_sa_query sa_query;
94};
95
96struct ib_sa_mcmember_query {
97 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
98 void *context;
99 struct ib_sa_query sa_query;
100};
101
102static void ib_sa_add_one(struct ib_device *device);
103static void ib_sa_remove_one(struct ib_device *device);
104
105static struct ib_client sa_client = {
106 .name = "sa",
107 .add = ib_sa_add_one,
108 .remove = ib_sa_remove_one
109};
110
111static spinlock_t idr_lock;
112static DEFINE_IDR(query_idr);
113
114static spinlock_t tid_lock;
115static u32 tid;
116
1da177e4
LT		 117#define PATH_REC_FIELD(field) \
118 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
119 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
120 .field_name = "sa_path_rec:" #field
121
122static const struct ib_field path_rec_table[] = {
123 { RESERVED,
124 .offset_words = 0,
125 .offset_bits = 0,
126 .size_bits = 32 },
127 { RESERVED,
128 .offset_words = 1,
129 .offset_bits = 0,
130 .size_bits = 32 },
131 { PATH_REC_FIELD(dgid),
132 .offset_words = 2,
133 .offset_bits = 0,
134 .size_bits = 128 },
135 { PATH_REC_FIELD(sgid),
136 .offset_words = 6,
137 .offset_bits = 0,
138 .size_bits = 128 },
139 { PATH_REC_FIELD(dlid),
140 .offset_words = 10,
141 .offset_bits = 0,
142 .size_bits = 16 },
143 { PATH_REC_FIELD(slid),
144 .offset_words = 10,
145 .offset_bits = 16,
146 .size_bits = 16 },
147 { PATH_REC_FIELD(raw_traffic),
148 .offset_words = 11,
149 .offset_bits = 0,
150 .size_bits = 1 },
151 { RESERVED,
152 .offset_words = 11,
153 .offset_bits = 1,
154 .size_bits = 3 },
155 { PATH_REC_FIELD(flow_label),
156 .offset_words = 11,
157 .offset_bits = 4,
158 .size_bits = 20 },
159 { PATH_REC_FIELD(hop_limit),
160 .offset_words = 11,
161 .offset_bits = 24,
162 .size_bits = 8 },
163 { PATH_REC_FIELD(traffic_class),
164 .offset_words = 12,
165 .offset_bits = 0,
166 .size_bits = 8 },
167 { PATH_REC_FIELD(reversible),
168 .offset_words = 12,
169 .offset_bits = 8,
170 .size_bits = 1 },
171 { PATH_REC_FIELD(numb_path),
172 .offset_words = 12,
173 .offset_bits = 9,
174 .size_bits = 7 },
175 { PATH_REC_FIELD(pkey),
176 .offset_words = 12,
177 .offset_bits = 16,
178 .size_bits = 16 },
179 { RESERVED,
180 .offset_words = 13,
181 .offset_bits = 0,
182 .size_bits = 12 },
183 { PATH_REC_FIELD(sl),
184 .offset_words = 13,
185 .offset_bits = 12,
186 .size_bits = 4 },
187 { PATH_REC_FIELD(mtu_selector),
188 .offset_words = 13,
189 .offset_bits = 16,
190 .size_bits = 2 },
191 { PATH_REC_FIELD(mtu),
192 .offset_words = 13,
193 .offset_bits = 18,
194 .size_bits = 6 },
195 { PATH_REC_FIELD(rate_selector),
196 .offset_words = 13,
197 .offset_bits = 24,
198 .size_bits = 2 },
199 { PATH_REC_FIELD(rate),
200 .offset_words = 13,
201 .offset_bits = 26,
202 .size_bits = 6 },
203 { PATH_REC_FIELD(packet_life_time_selector),
204 .offset_words = 14,
205 .offset_bits = 0,
206 .size_bits = 2 },
207 { PATH_REC_FIELD(packet_life_time),
208 .offset_words = 14,
209 .offset_bits = 2,
210 .size_bits = 6 },
211 { PATH_REC_FIELD(preference),
212 .offset_words = 14,
213 .offset_bits = 8,
214 .size_bits = 8 },
215 { RESERVED,
216 .offset_words = 14,
217 .offset_bits = 16,
218 .size_bits = 48 },
219};
220
221#define MCMEMBER_REC_FIELD(field) \
222 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
223 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
224 .field_name = "sa_mcmember_rec:" #field
225
226static const struct ib_field mcmember_rec_table[] = {
227 { MCMEMBER_REC_FIELD(mgid),
228 .offset_words = 0,
229 .offset_bits = 0,
230 .size_bits = 128 },
231 { MCMEMBER_REC_FIELD(port_gid),
232 .offset_words = 4,
233 .offset_bits = 0,
234 .size_bits = 128 },
235 { MCMEMBER_REC_FIELD(qkey),
236 .offset_words = 8,
237 .offset_bits = 0,
238 .size_bits = 32 },
239 { MCMEMBER_REC_FIELD(mlid),
240 .offset_words = 9,
241 .offset_bits = 0,
242 .size_bits = 16 },
243 { MCMEMBER_REC_FIELD(mtu_selector),
244 .offset_words = 9,
245 .offset_bits = 16,
246 .size_bits = 2 },
247 { MCMEMBER_REC_FIELD(mtu),
248 .offset_words = 9,
249 .offset_bits = 18,
250 .size_bits = 6 },
251 { MCMEMBER_REC_FIELD(traffic_class),
252 .offset_words = 9,
253 .offset_bits = 24,
254 .size_bits = 8 },
255 { MCMEMBER_REC_FIELD(pkey),
256 .offset_words = 10,
257 .offset_bits = 0,
258 .size_bits = 16 },
259 { MCMEMBER_REC_FIELD(rate_selector),
260 .offset_words = 10,
261 .offset_bits = 16,
262 .size_bits = 2 },
263 { MCMEMBER_REC_FIELD(rate),
264 .offset_words = 10,
265 .offset_bits = 18,
266 .size_bits = 6 },
267 { MCMEMBER_REC_FIELD(packet_life_time_selector),
268 .offset_words = 10,
269 .offset_bits = 24,
270 .size_bits = 2 },
271 { MCMEMBER_REC_FIELD(packet_life_time),
272 .offset_words = 10,
273 .offset_bits = 26,
274 .size_bits = 6 },
275 { MCMEMBER_REC_FIELD(sl),
276 .offset_words = 11,
277 .offset_bits = 0,
278 .size_bits = 4 },
279 { MCMEMBER_REC_FIELD(flow_label),
280 .offset_words = 11,
281 .offset_bits = 4,
282 .size_bits = 20 },
283 { MCMEMBER_REC_FIELD(hop_limit),
284 .offset_words = 11,
285 .offset_bits = 24,
286 .size_bits = 8 },
287 { MCMEMBER_REC_FIELD(scope),
288 .offset_words = 12,
289 .offset_bits = 0,
290 .size_bits = 4 },
291 { MCMEMBER_REC_FIELD(join_state),
292 .offset_words = 12,
293 .offset_bits = 4,
294 .size_bits = 4 },
295 { MCMEMBER_REC_FIELD(proxy_join),
296 .offset_words = 12,
297 .offset_bits = 8,
298 .size_bits = 1 },
299 { RESERVED,
300 .offset_words = 12,
301 .offset_bits = 9,
302 .size_bits = 23 },
303};
304
cbae32c5
HR		 305#define SERVICE_REC_FIELD(field) \
306 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
307 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
308 .field_name = "sa_service_rec:" #field
309
310static const struct ib_field service_rec_table[] = {
311 { SERVICE_REC_FIELD(id),
312 .offset_words = 0,
313 .offset_bits = 0,
314 .size_bits = 64 },
315 { SERVICE_REC_FIELD(gid),
316 .offset_words = 2,
317 .offset_bits = 0,
318 .size_bits = 128 },
319 { SERVICE_REC_FIELD(pkey),
320 .offset_words = 6,
321 .offset_bits = 0,
322 .size_bits = 16 },
323 { SERVICE_REC_FIELD(lease),
324 .offset_words = 7,
325 .offset_bits = 0,
326 .size_bits = 32 },
327 { SERVICE_REC_FIELD(key),
328 .offset_words = 8,
329 .offset_bits = 0,
330 .size_bits = 128 },
331 { SERVICE_REC_FIELD(name),
332 .offset_words = 12,
333 .offset_bits = 0,
334 .size_bits = 64*8 },
335 { SERVICE_REC_FIELD(data8),
336 .offset_words = 28,
337 .offset_bits = 0,
338 .size_bits = 16*8 },
339 { SERVICE_REC_FIELD(data16),
340 .offset_words = 32,
341 .offset_bits = 0,
342 .size_bits = 8*16 },
343 { SERVICE_REC_FIELD(data32),
344 .offset_words = 36,
345 .offset_bits = 0,
346 .size_bits = 4*32 },
347 { SERVICE_REC_FIELD(data64),
348 .offset_words = 40,
349 .offset_bits = 0,
350 .size_bits = 2*64 },
351};
352
1da177e4
LT		 353static void free_sm_ah(struct kref *kref)
354{
355 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
356
357 ib_destroy_ah(sm_ah->ah);
358 kfree(sm_ah);
359}
360
361static void update_sm_ah(void *port_ptr)
362{
363 struct ib_sa_port *port = port_ptr;
364 struct ib_sa_sm_ah *new_ah, *old_ah;
365 struct ib_port_attr port_attr;
366 struct ib_ah_attr ah_attr;
367
368 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
369 printk(KERN_WARNING "Couldn't query port\n");
370 return;
371 }
372
373 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
374 if (!new_ah) {
375 printk(KERN_WARNING "Couldn't allocate new SM AH\n");
376 return;
377 }
378
379 kref_init(&new_ah->ref);
380
381 memset(&ah_attr, 0, sizeof ah_attr);
382 ah_attr.dlid = port_attr.sm_lid;
383 ah_attr.sl = port_attr.sm_sl;
384 ah_attr.port_num = port->port_num;
385
386 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
387 if (IS_ERR(new_ah->ah)) {
388 printk(KERN_WARNING "Couldn't create new SM AH\n");
389 kfree(new_ah);
390 return;
391 }
392
393 spin_lock_irq(&port->ah_lock);
394 old_ah = port->sm_ah;
395 port->sm_ah = new_ah;
396 spin_unlock_irq(&port->ah_lock);
397
398 if (old_ah)
399 kref_put(&old_ah->ref, free_sm_ah);
400}
401
402static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
403{
404 if (event->event == IB_EVENT_PORT_ERR ||
405 event->event == IB_EVENT_PORT_ACTIVE ||
406 event->event == IB_EVENT_LID_CHANGE ||
407 event->event == IB_EVENT_PKEY_CHANGE ||
acaea9ee
JM		 408 event->event == IB_EVENT_SM_CHANGE ||
409 event->event == IB_EVENT_CLIENT_REREGISTER) {
1d6801f9
MT		 410 struct ib_sa_device *sa_dev;
411 sa_dev = container_of(handler, typeof(*sa_dev), event_handler);
1da177e4
LT		 412
413 schedule_work(&sa_dev->port[event->element.port_num -
414 sa_dev->start_port].update_task);
415 }
416}
417
418/**
419 * ib_sa_cancel_query - try to cancel an SA query
420 * @id:ID of query to cancel
421 * @query:query pointer to cancel
422 *
423 * Try to cancel an SA query. If the id and query don't match up or
424 * the query has already completed, nothing is done. Otherwise the
425 * query is canceled and will complete with a status of -EINTR.
426 */
427void ib_sa_cancel_query(int id, struct ib_sa_query *query)
428{
429 unsigned long flags;
430 struct ib_mad_agent *agent;
34816ad9 431 struct ib_mad_send_buf *mad_buf;
1da177e4
LT		 432
433 spin_lock_irqsave(&idr_lock, flags);
434 if (idr_find(&query_idr, id) != query) {
435 spin_unlock_irqrestore(&idr_lock, flags);
436 return;
437 }
438 agent = query->port->agent;
34816ad9 439 mad_buf = query->mad_buf;
1da177e4
LT		 440 spin_unlock_irqrestore(&idr_lock, flags);
441
34816ad9 442 ib_cancel_mad(agent, mad_buf);
1da177e4
LT		 443}
444EXPORT_SYMBOL(ib_sa_cancel_query);
445
6d969a47
SH		 446int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
447 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)
448{
449 int ret;
450 u16 gid_index;
451
452 memset(ah_attr, 0, sizeof *ah_attr);
453 ah_attr->dlid = be16_to_cpu(rec->dlid);
454 ah_attr->sl = rec->sl;
455 ah_attr->src_path_bits = be16_to_cpu(rec->slid) & 0x7f;
456 ah_attr->port_num = port_num;
457
458 if (rec->hop_limit > 1) {
459 ah_attr->ah_flags = IB_AH_GRH;
460 ah_attr->grh.dgid = rec->dgid;
461
462 ret = ib_find_cached_gid(device, &rec->sgid, &port_num,
463 &gid_index);
464 if (ret)
465 return ret;
466
ca222c6b
SH		 467 ah_attr->grh.sgid_index = gid_index;
468 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label);
469 ah_attr->grh.hop_limit = rec->hop_limit;
6d969a47
SH		 470 ah_attr->grh.traffic_class = rec->traffic_class;
471 }
472 return 0;
473}
474EXPORT_SYMBOL(ib_init_ah_from_path);
475
1da177e4
LT		 476static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
477{
478 unsigned long flags;
479
480 memset(mad, 0, sizeof *mad);
481
482 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
483 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
484 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
485
486 spin_lock_irqsave(&tid_lock, flags);
487 mad->mad_hdr.tid =
488 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
489 spin_unlock_irqrestore(&tid_lock, flags);
490}
491
e322fedf 492static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
1da177e4 493{
1da177e4 494 unsigned long flags;
34816ad9 495 int ret, id;
1da177e4
LT		 496
497retry:
e322fedf 498 if (!idr_pre_get(&query_idr, gfp_mask))
1da177e4
LT		 499 return -ENOMEM;
500 spin_lock_irqsave(&idr_lock, flags);
34816ad9 501 ret = idr_get_new(&query_idr, query, &id);
1da177e4
LT		 502 spin_unlock_irqrestore(&idr_lock, flags);
503 if (ret == -EAGAIN)
504 goto retry;
505 if (ret)
506 return ret;
507
34816ad9
SH		 508 query->mad_buf->timeout_ms = timeout_ms;
509 query->mad_buf->context[0] = query;
510 query->id = id;
1da177e4 511
34816ad9
SH		 512 spin_lock_irqsave(&query->port->ah_lock, flags);
513 kref_get(&query->port->sm_ah->ref);
514 query->sm_ah = query->port->sm_ah;
515 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1da177e4 516
34816ad9 517 query->mad_buf->ah = query->sm_ah->ah;
1da177e4 518
34816ad9 519 ret = ib_post_send_mad(query->mad_buf, NULL);
1da177e4 520 if (ret) {
1da177e4 521 spin_lock_irqsave(&idr_lock, flags);
34816ad9 522 idr_remove(&query_idr, id);
1da177e4 523 spin_unlock_irqrestore(&idr_lock, flags);
34816ad9
SH		 524
525 kref_put(&query->sm_ah->ref, free_sm_ah);
1da177e4
LT		 526 }
527
dae4c1d2
RD		 528 /*
529 * It's not safe to dereference query any more, because the
530 * send may already have completed and freed the query in
34816ad9 531 * another context.
dae4c1d2 532 */
34816ad9 533 return ret ? ret : id;
1da177e4
LT		 534}
535
536static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
537 int status,
538 struct ib_sa_mad *mad)
539{
540 struct ib_sa_path_query *query =
541 container_of(sa_query, struct ib_sa_path_query, sa_query);
542
543 if (mad) {
544 struct ib_sa_path_rec rec;
545
546 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
547 mad->data, &rec);
548 query->callback(status, &rec, query->context);
549 } else
550 query->callback(status, NULL, query->context);
551}
552
553static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
554{
1da177e4
LT		 555 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
556}
557
558/**
559 * ib_sa_path_rec_get - Start a Path get query
560 * @device:device to send query on
561 * @port_num: port number to send query on
562 * @rec:Path Record to send in query
563 * @comp_mask:component mask to send in query
564 * @timeout_ms:time to wait for response
565 * @gfp_mask:GFP mask to use for internal allocations
566 * @callback:function called when query completes, times out or is
567 * canceled
568 * @context:opaque user context passed to callback
569 * @sa_query:query context, used to cancel query
570 *
571 * Send a Path Record Get query to the SA to look up a path. The
572 * callback function will be called when the query completes (or
573 * fails); status is 0 for a successful response, -EINTR if the query
574 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
575 * occurred sending the query. The resp parameter of the callback is
576 * only valid if status is 0.
577 *
578 * If the return value of ib_sa_path_rec_get() is negative, it is an
579 * error code. Otherwise it is a query ID that can be used to cancel
580 * the query.
581 */
582int ib_sa_path_rec_get(struct ib_device *device, u8 port_num,
583 struct ib_sa_path_rec *rec,
584 ib_sa_comp_mask comp_mask,
dd0fc66f 585 int timeout_ms, gfp_t gfp_mask,
1da177e4
LT		 586 void (*callback)(int status,
587 struct ib_sa_path_rec *resp,
588 void *context),
589 void *context,
590 struct ib_sa_query **sa_query)
591{
592 struct ib_sa_path_query *query;
593 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
56c202d6
RD		 594 struct ib_sa_port *port;
595 struct ib_mad_agent *agent;
34816ad9 596 struct ib_sa_mad *mad;
1da177e4
LT		 597 int ret;
598
56c202d6
RD		 599 if (!sa_dev)
600 return -ENODEV;
601
602 port = &sa_dev->port[port_num - sa_dev->start_port];
603 agent = port->agent;
604
1da177e4
LT		 605 query = kmalloc(sizeof *query, gfp_mask);
606 if (!query)
607 return -ENOMEM;
34816ad9
SH		 608
609 query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0,
610 0, IB_MGMT_SA_HDR,
611 IB_MGMT_SA_DATA, gfp_mask);
612 if (!query->sa_query.mad_buf) {
613 ret = -ENOMEM;
614 goto err1;
1da177e4
LT		 615 }
616
617 query->callback = callback;
618 query->context = context;
619
34816ad9
SH		 620 mad = query->sa_query.mad_buf->mad;
621 init_mad(mad, agent);
1da177e4 622
34816ad9
SH		 623 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
624 query->sa_query.release = ib_sa_path_rec_release;
625 query->sa_query.port = port;
626 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
627 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
628 mad->sa_hdr.comp_mask = comp_mask;
1da177e4 629
34816ad9 630 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
1da177e4
LT		 631
632 *sa_query = &query->sa_query;
dae4c1d2 633
e322fedf 634 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
34816ad9
SH		 635 if (ret < 0)
636 goto err2;
637
638 return ret;
639
640err2:
641 *sa_query = NULL;
642 ib_free_send_mad(query->sa_query.mad_buf);
1da177e4 643
34816ad9
SH		 644err1:
645 kfree(query);
dae4c1d2 646 return ret;
1da177e4
LT		 647}
648EXPORT_SYMBOL(ib_sa_path_rec_get);
649
cbae32c5
HR		 650static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
651 int status,
652 struct ib_sa_mad *mad)
653{
654 struct ib_sa_service_query *query =
655 container_of(sa_query, struct ib_sa_service_query, sa_query);
656
657 if (mad) {
658 struct ib_sa_service_rec rec;
659
660 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
661 mad->data, &rec);
662 query->callback(status, &rec, query->context);
663 } else
664 query->callback(status, NULL, query->context);
665}
666
667static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
668{
cbae32c5
HR		 669 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
670}
671
672/**
673 * ib_sa_service_rec_query - Start Service Record operation
674 * @device:device to send request on
675 * @port_num: port number to send request on
676 * @method:SA method - should be get, set, or delete
677 * @rec:Service Record to send in request
678 * @comp_mask:component mask to send in request
679 * @timeout_ms:time to wait for response
680 * @gfp_mask:GFP mask to use for internal allocations
681 * @callback:function called when request completes, times out or is
682 * canceled
683 * @context:opaque user context passed to callback
684 * @sa_query:request context, used to cancel request
685 *
686 * Send a Service Record set/get/delete to the SA to register,
687 * unregister or query a service record.
688 * The callback function will be called when the request completes (or
689 * fails); status is 0 for a successful response, -EINTR if the query
690 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
691 * occurred sending the query. The resp parameter of the callback is
692 * only valid if status is 0.
693 *
694 * If the return value of ib_sa_service_rec_query() is negative, it is an
695 * error code. Otherwise it is a request ID that can be used to cancel
696 * the query.
697 */
698int ib_sa_service_rec_query(struct ib_device *device, u8 port_num, u8 method,
699 struct ib_sa_service_rec *rec,
700 ib_sa_comp_mask comp_mask,
dd0fc66f 701 int timeout_ms, gfp_t gfp_mask,
cbae32c5
HR		 702 void (*callback)(int status,
703 struct ib_sa_service_rec *resp,
704 void *context),
705 void *context,
706 struct ib_sa_query **sa_query)
707{
708 struct ib_sa_service_query *query;
709 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
56c202d6
RD		 710 struct ib_sa_port *port;
711 struct ib_mad_agent *agent;
34816ad9 712 struct ib_sa_mad *mad;
cbae32c5
HR		 713 int ret;
714
56c202d6
RD		 715 if (!sa_dev)
716 return -ENODEV;
717
718 port = &sa_dev->port[port_num - sa_dev->start_port];
719 agent = port->agent;
720
cbae32c5
HR		 721 if (method != IB_MGMT_METHOD_GET &&
722 method != IB_MGMT_METHOD_SET &&
723 method != IB_SA_METHOD_DELETE)
724 return -EINVAL;
725
726 query = kmalloc(sizeof *query, gfp_mask);
727 if (!query)
728 return -ENOMEM;
34816ad9
SH		 729
730 query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0,
731 0, IB_MGMT_SA_HDR,
732 IB_MGMT_SA_DATA, gfp_mask);
733 if (!query->sa_query.mad_buf) {
734 ret = -ENOMEM;
735 goto err1;
cbae32c5
HR		 736 }
737
738 query->callback = callback;
739 query->context = context;
740
34816ad9
SH		 741 mad = query->sa_query.mad_buf->mad;
742 init_mad(mad, agent);
cbae32c5 743
34816ad9
SH		 744 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
745 query->sa_query.release = ib_sa_service_rec_release;
746 query->sa_query.port = port;
747 mad->mad_hdr.method = method;
748 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
749 mad->sa_hdr.comp_mask = comp_mask;
cbae32c5
HR		 750
751 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
34816ad9 752 rec, mad->data);
cbae32c5
HR		 753
754 *sa_query = &query->sa_query;
755
e322fedf 756 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
34816ad9
SH		 757 if (ret < 0)
758 goto err2;
759
760 return ret;
cbae32c5 761
34816ad9
SH		 762err2:
763 *sa_query = NULL;
764 ib_free_send_mad(query->sa_query.mad_buf);
765
766err1:
767 kfree(query);
cbae32c5
HR		 768 return ret;
769}
770EXPORT_SYMBOL(ib_sa_service_rec_query);
771
1da177e4
LT		 772static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
773 int status,
774 struct ib_sa_mad *mad)
775{
776 struct ib_sa_mcmember_query *query =
777 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
778
779 if (mad) {
780 struct ib_sa_mcmember_rec rec;
781
782 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
783 mad->data, &rec);
784 query->callback(status, &rec, query->context);
785 } else
786 query->callback(status, NULL, query->context);
787}
788
789static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
790{
1da177e4
LT		 791 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
792}
793
794int ib_sa_mcmember_rec_query(struct ib_device *device, u8 port_num,
795 u8 method,
796 struct ib_sa_mcmember_rec *rec,
797 ib_sa_comp_mask comp_mask,
dd0fc66f 798 int timeout_ms, gfp_t gfp_mask,
1da177e4
LT		 799 void (*callback)(int status,
800 struct ib_sa_mcmember_rec *resp,
801 void *context),
802 void *context,
803 struct ib_sa_query **sa_query)
804{
805 struct ib_sa_mcmember_query *query;
806 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
56c202d6
RD		 807 struct ib_sa_port *port;
808 struct ib_mad_agent *agent;
34816ad9 809 struct ib_sa_mad *mad;
1da177e4
LT		 810 int ret;
811
56c202d6
RD		 812 if (!sa_dev)
813 return -ENODEV;
814
815 port = &sa_dev->port[port_num - sa_dev->start_port];
816 agent = port->agent;
817
1da177e4
LT		 818 query = kmalloc(sizeof *query, gfp_mask);
819 if (!query)
820 return -ENOMEM;
34816ad9
SH		 821
822 query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0,
823 0, IB_MGMT_SA_HDR,
824 IB_MGMT_SA_DATA, gfp_mask);
825 if (!query->sa_query.mad_buf) {
826 ret = -ENOMEM;
827 goto err1;
1da177e4
LT		 828 }
829
830 query->callback = callback;
831 query->context = context;
832
34816ad9
SH		 833 mad = query->sa_query.mad_buf->mad;
834 init_mad(mad, agent);
1da177e4 835
34816ad9
SH		 836 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
837 query->sa_query.release = ib_sa_mcmember_rec_release;
838 query->sa_query.port = port;
839 mad->mad_hdr.method = method;
840 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
841 mad->sa_hdr.comp_mask = comp_mask;
1da177e4
LT		 842
843 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
34816ad9 844 rec, mad->data);
1da177e4
LT		 845
846 *sa_query = &query->sa_query;
dae4c1d2 847
e322fedf 848 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
34816ad9
SH		 849 if (ret < 0)
850 goto err2;
1da177e4 851
dae4c1d2 852 return ret;
34816ad9
SH		 853
854err2:
855 *sa_query = NULL;
856 ib_free_send_mad(query->sa_query.mad_buf);
857
858err1:
859 kfree(query);
860 return ret;
1da177e4
LT		 861}
862EXPORT_SYMBOL(ib_sa_mcmember_rec_query);
863
864static void send_handler(struct ib_mad_agent *agent,
865 struct ib_mad_send_wc *mad_send_wc)
866{
34816ad9 867 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
1da177e4
LT		 868 unsigned long flags;
869
e4f50f00
RD		 870 if (query->callback)
871 switch (mad_send_wc->status) {
872 case IB_WC_SUCCESS:
873 /* No callback -- already got recv */
874 break;
875 case IB_WC_RESP_TIMEOUT_ERR:
876 query->callback(query, -ETIMEDOUT, NULL);
877 break;
878 case IB_WC_WR_FLUSH_ERR:
879 query->callback(query, -EINTR, NULL);
880 break;
881 default:
882 query->callback(query, -EIO, NULL);
883 break;
884 }
1da177e4 885
1da177e4 886 spin_lock_irqsave(&idr_lock, flags);
34816ad9 887 idr_remove(&query_idr, query->id);
1da177e4 888 spin_unlock_irqrestore(&idr_lock, flags);
34816ad9 889
3cd96564 890 ib_free_send_mad(mad_send_wc->send_buf);
34816ad9
SH		 891 kref_put(&query->sm_ah->ref, free_sm_ah);
892 query->release(query);
1da177e4
LT		 893}
894
895static void recv_handler(struct ib_mad_agent *mad_agent,
896 struct ib_mad_recv_wc *mad_recv_wc)
897{
898 struct ib_sa_query *query;
34816ad9 899 struct ib_mad_send_buf *mad_buf;
1da177e4 900
34816ad9
SH		 901 mad_buf = (void *) (unsigned long) mad_recv_wc->wc->wr_id;
902 query = mad_buf->context[0];
1da177e4 903
34816ad9 904 if (query->callback) {
1da177e4
LT		 905 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
906 query->callback(query,
907 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
908 -EINVAL : 0,
909 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
910 else
911 query->callback(query, -EIO, NULL);
912 }
913
914 ib_free_recv_mad(mad_recv_wc);
915}
916
917static void ib_sa_add_one(struct ib_device *device)
918{
919 struct ib_sa_device *sa_dev;
920 int s, e, i;
921
922 if (device->node_type == IB_NODE_SWITCH)
923 s = e = 0;
924 else {
925 s = 1;
926 e = device->phys_port_cnt;
927 }
928
929 sa_dev = kmalloc(sizeof *sa_dev +
930 (e - s + 1) * sizeof (struct ib_sa_port),
931 GFP_KERNEL);
932 if (!sa_dev)
933 return;
934
935 sa_dev->start_port = s;
936 sa_dev->end_port = e;
937
938 for (i = 0; i <= e - s; ++i) {
1da177e4
LT		 939 sa_dev->port[i].sm_ah = NULL;
940 sa_dev->port[i].port_num = i + s;
941 spin_lock_init(&sa_dev->port[i].ah_lock);
942
943 sa_dev->port[i].agent =
944 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
945 NULL, 0, send_handler,
946 recv_handler, sa_dev);
947 if (IS_ERR(sa_dev->port[i].agent))
948 goto err;
949
1da177e4
LT		 950 INIT_WORK(&sa_dev->port[i].update_task,
951 update_sm_ah, &sa_dev->port[i]);
952 }
953
954 ib_set_client_data(device, &sa_client, sa_dev);
955
956 /*
957 * We register our event handler after everything is set up,
958 * and then update our cached info after the event handler is
959 * registered to avoid any problems if a port changes state
960 * during our initialization.
961 */
962
963 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
964 if (ib_register_event_handler(&sa_dev->event_handler))
965 goto err;
966
967 for (i = 0; i <= e - s; ++i)
968 update_sm_ah(&sa_dev->port[i]);
969
970 return;
971
972err:
b82cab6b 973 while (--i >= 0)
1da177e4 974 ib_unregister_mad_agent(sa_dev->port[i].agent);
1da177e4
LT		 975
976 kfree(sa_dev);
977
978 return;
979}
980
981static void ib_sa_remove_one(struct ib_device *device)
982{
983 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
984 int i;
985
986 if (!sa_dev)
987 return;
988
989 ib_unregister_event_handler(&sa_dev->event_handler);
990
0f47ae0b
MT		 991 flush_scheduled_work();
992
1da177e4
LT		 993 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
994 ib_unregister_mad_agent(sa_dev->port[i].agent);
995 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
996 }
997
998 kfree(sa_dev);
999}
1000
1001static int __init ib_sa_init(void)
1002{
1003 int ret;
1004
1005 spin_lock_init(&idr_lock);
1006 spin_lock_init(&tid_lock);
1007
1008 get_random_bytes(&tid, sizeof tid);
1009
1010 ret = ib_register_client(&sa_client);
1011 if (ret)
1012 printk(KERN_ERR "Couldn't register ib_sa client\n");
1013
1014 return ret;
1015}
1016
1017static void __exit ib_sa_cleanup(void)
1018{
1019 ib_unregister_client(&sa_client);
5d7edb3c 1020 idr_destroy(&query_idr);
1da177e4
LT		 1021}
1022
1023module_init(ib_sa_init);
1024module_exit(ib_sa_cleanup);
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