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[people/ms/linux.git] / drivers / infiniband / core / sa_query.c
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1da177e4
LT		 1/*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 * $Id: sa_query.c 1389 2004-12-27 22:56:47Z roland $
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/pci.h>
42#include <linux/dma-mapping.h>
43#include <linux/kref.h>
44#include <linux/idr.h>
45
46#include <ib_pack.h>
47#include <ib_sa.h>
48
49MODULE_AUTHOR("Roland Dreier");
50MODULE_DESCRIPTION("InfiniBand subnet administration query support");
51MODULE_LICENSE("Dual BSD/GPL");
52
53/*
54 * These two structures must be packed because they have 64-bit fields
55 * that are only 32-bit aligned. 64-bit architectures will lay them
56 * out wrong otherwise. (And unfortunately they are sent on the wire
57 * so we can't change the layout)
58 */
59struct ib_sa_hdr {
60 u64 sm_key;
61 u16 attr_offset;
62 u16 reserved;
63 ib_sa_comp_mask comp_mask;
64} __attribute__ ((packed));
65
66struct ib_sa_mad {
67 struct ib_mad_hdr mad_hdr;
68 struct ib_rmpp_hdr rmpp_hdr;
69 struct ib_sa_hdr sa_hdr;
70 u8 data[200];
71} __attribute__ ((packed));
72
73struct ib_sa_sm_ah {
74 struct ib_ah *ah;
75 struct kref ref;
76};
77
78struct ib_sa_port {
79 struct ib_mad_agent *agent;
80 struct ib_mr *mr;
81 struct ib_sa_sm_ah *sm_ah;
82 struct work_struct update_task;
83 spinlock_t ah_lock;
84 u8 port_num;
85};
86
87struct ib_sa_device {
88 int start_port, end_port;
89 struct ib_event_handler event_handler;
90 struct ib_sa_port port[0];
91};
92
93struct ib_sa_query {
94 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
95 void (*release)(struct ib_sa_query *);
96 struct ib_sa_port *port;
97 struct ib_sa_mad *mad;
98 struct ib_sa_sm_ah *sm_ah;
99 DECLARE_PCI_UNMAP_ADDR(mapping)
100 int id;
101};
102
103struct ib_sa_path_query {
104 void (*callback)(int, struct ib_sa_path_rec *, void *);
105 void *context;
106 struct ib_sa_query sa_query;
107};
108
109struct ib_sa_mcmember_query {
110 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
111 void *context;
112 struct ib_sa_query sa_query;
113};
114
115static void ib_sa_add_one(struct ib_device *device);
116static void ib_sa_remove_one(struct ib_device *device);
117
118static struct ib_client sa_client = {
119 .name = "sa",
120 .add = ib_sa_add_one,
121 .remove = ib_sa_remove_one
122};
123
124static spinlock_t idr_lock;
125static DEFINE_IDR(query_idr);
126
127static spinlock_t tid_lock;
128static u32 tid;
129
130enum {
131 IB_SA_ATTR_CLASS_PORTINFO = 0x01,
132 IB_SA_ATTR_NOTICE = 0x02,
133 IB_SA_ATTR_INFORM_INFO = 0x03,
134 IB_SA_ATTR_NODE_REC = 0x11,
135 IB_SA_ATTR_PORT_INFO_REC = 0x12,
136 IB_SA_ATTR_SL2VL_REC = 0x13,
137 IB_SA_ATTR_SWITCH_REC = 0x14,
138 IB_SA_ATTR_LINEAR_FDB_REC = 0x15,
139 IB_SA_ATTR_RANDOM_FDB_REC = 0x16,
140 IB_SA_ATTR_MCAST_FDB_REC = 0x17,
141 IB_SA_ATTR_SM_INFO_REC = 0x18,
142 IB_SA_ATTR_LINK_REC = 0x20,
143 IB_SA_ATTR_GUID_INFO_REC = 0x30,
144 IB_SA_ATTR_SERVICE_REC = 0x31,
145 IB_SA_ATTR_PARTITION_REC = 0x33,
146 IB_SA_ATTR_RANGE_REC = 0x34,
147 IB_SA_ATTR_PATH_REC = 0x35,
148 IB_SA_ATTR_VL_ARB_REC = 0x36,
149 IB_SA_ATTR_MC_GROUP_REC = 0x37,
150 IB_SA_ATTR_MC_MEMBER_REC = 0x38,
151 IB_SA_ATTR_TRACE_REC = 0x39,
152 IB_SA_ATTR_MULTI_PATH_REC = 0x3a,
153 IB_SA_ATTR_SERVICE_ASSOC_REC = 0x3b
154};
155
156#define PATH_REC_FIELD(field) \
157 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
158 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
159 .field_name = "sa_path_rec:" #field
160
161static const struct ib_field path_rec_table[] = {
162 { RESERVED,
163 .offset_words = 0,
164 .offset_bits = 0,
165 .size_bits = 32 },
166 { RESERVED,
167 .offset_words = 1,
168 .offset_bits = 0,
169 .size_bits = 32 },
170 { PATH_REC_FIELD(dgid),
171 .offset_words = 2,
172 .offset_bits = 0,
173 .size_bits = 128 },
174 { PATH_REC_FIELD(sgid),
175 .offset_words = 6,
176 .offset_bits = 0,
177 .size_bits = 128 },
178 { PATH_REC_FIELD(dlid),
179 .offset_words = 10,
180 .offset_bits = 0,
181 .size_bits = 16 },
182 { PATH_REC_FIELD(slid),
183 .offset_words = 10,
184 .offset_bits = 16,
185 .size_bits = 16 },
186 { PATH_REC_FIELD(raw_traffic),
187 .offset_words = 11,
188 .offset_bits = 0,
189 .size_bits = 1 },
190 { RESERVED,
191 .offset_words = 11,
192 .offset_bits = 1,
193 .size_bits = 3 },
194 { PATH_REC_FIELD(flow_label),
195 .offset_words = 11,
196 .offset_bits = 4,
197 .size_bits = 20 },
198 { PATH_REC_FIELD(hop_limit),
199 .offset_words = 11,
200 .offset_bits = 24,
201 .size_bits = 8 },
202 { PATH_REC_FIELD(traffic_class),
203 .offset_words = 12,
204 .offset_bits = 0,
205 .size_bits = 8 },
206 { PATH_REC_FIELD(reversible),
207 .offset_words = 12,
208 .offset_bits = 8,
209 .size_bits = 1 },
210 { PATH_REC_FIELD(numb_path),
211 .offset_words = 12,
212 .offset_bits = 9,
213 .size_bits = 7 },
214 { PATH_REC_FIELD(pkey),
215 .offset_words = 12,
216 .offset_bits = 16,
217 .size_bits = 16 },
218 { RESERVED,
219 .offset_words = 13,
220 .offset_bits = 0,
221 .size_bits = 12 },
222 { PATH_REC_FIELD(sl),
223 .offset_words = 13,
224 .offset_bits = 12,
225 .size_bits = 4 },
226 { PATH_REC_FIELD(mtu_selector),
227 .offset_words = 13,
228 .offset_bits = 16,
229 .size_bits = 2 },
230 { PATH_REC_FIELD(mtu),
231 .offset_words = 13,
232 .offset_bits = 18,
233 .size_bits = 6 },
234 { PATH_REC_FIELD(rate_selector),
235 .offset_words = 13,
236 .offset_bits = 24,
237 .size_bits = 2 },
238 { PATH_REC_FIELD(rate),
239 .offset_words = 13,
240 .offset_bits = 26,
241 .size_bits = 6 },
242 { PATH_REC_FIELD(packet_life_time_selector),
243 .offset_words = 14,
244 .offset_bits = 0,
245 .size_bits = 2 },
246 { PATH_REC_FIELD(packet_life_time),
247 .offset_words = 14,
248 .offset_bits = 2,
249 .size_bits = 6 },
250 { PATH_REC_FIELD(preference),
251 .offset_words = 14,
252 .offset_bits = 8,
253 .size_bits = 8 },
254 { RESERVED,
255 .offset_words = 14,
256 .offset_bits = 16,
257 .size_bits = 48 },
258};
259
260#define MCMEMBER_REC_FIELD(field) \
261 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
262 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
263 .field_name = "sa_mcmember_rec:" #field
264
265static const struct ib_field mcmember_rec_table[] = {
266 { MCMEMBER_REC_FIELD(mgid),
267 .offset_words = 0,
268 .offset_bits = 0,
269 .size_bits = 128 },
270 { MCMEMBER_REC_FIELD(port_gid),
271 .offset_words = 4,
272 .offset_bits = 0,
273 .size_bits = 128 },
274 { MCMEMBER_REC_FIELD(qkey),
275 .offset_words = 8,
276 .offset_bits = 0,
277 .size_bits = 32 },
278 { MCMEMBER_REC_FIELD(mlid),
279 .offset_words = 9,
280 .offset_bits = 0,
281 .size_bits = 16 },
282 { MCMEMBER_REC_FIELD(mtu_selector),
283 .offset_words = 9,
284 .offset_bits = 16,
285 .size_bits = 2 },
286 { MCMEMBER_REC_FIELD(mtu),
287 .offset_words = 9,
288 .offset_bits = 18,
289 .size_bits = 6 },
290 { MCMEMBER_REC_FIELD(traffic_class),
291 .offset_words = 9,
292 .offset_bits = 24,
293 .size_bits = 8 },
294 { MCMEMBER_REC_FIELD(pkey),
295 .offset_words = 10,
296 .offset_bits = 0,
297 .size_bits = 16 },
298 { MCMEMBER_REC_FIELD(rate_selector),
299 .offset_words = 10,
300 .offset_bits = 16,
301 .size_bits = 2 },
302 { MCMEMBER_REC_FIELD(rate),
303 .offset_words = 10,
304 .offset_bits = 18,
305 .size_bits = 6 },
306 { MCMEMBER_REC_FIELD(packet_life_time_selector),
307 .offset_words = 10,
308 .offset_bits = 24,
309 .size_bits = 2 },
310 { MCMEMBER_REC_FIELD(packet_life_time),
311 .offset_words = 10,
312 .offset_bits = 26,
313 .size_bits = 6 },
314 { MCMEMBER_REC_FIELD(sl),
315 .offset_words = 11,
316 .offset_bits = 0,
317 .size_bits = 4 },
318 { MCMEMBER_REC_FIELD(flow_label),
319 .offset_words = 11,
320 .offset_bits = 4,
321 .size_bits = 20 },
322 { MCMEMBER_REC_FIELD(hop_limit),
323 .offset_words = 11,
324 .offset_bits = 24,
325 .size_bits = 8 },
326 { MCMEMBER_REC_FIELD(scope),
327 .offset_words = 12,
328 .offset_bits = 0,
329 .size_bits = 4 },
330 { MCMEMBER_REC_FIELD(join_state),
331 .offset_words = 12,
332 .offset_bits = 4,
333 .size_bits = 4 },
334 { MCMEMBER_REC_FIELD(proxy_join),
335 .offset_words = 12,
336 .offset_bits = 8,
337 .size_bits = 1 },
338 { RESERVED,
339 .offset_words = 12,
340 .offset_bits = 9,
341 .size_bits = 23 },
342};
343
344static void free_sm_ah(struct kref *kref)
345{
346 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
347
348 ib_destroy_ah(sm_ah->ah);
349 kfree(sm_ah);
350}
351
352static void update_sm_ah(void *port_ptr)
353{
354 struct ib_sa_port *port = port_ptr;
355 struct ib_sa_sm_ah *new_ah, *old_ah;
356 struct ib_port_attr port_attr;
357 struct ib_ah_attr ah_attr;
358
359 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
360 printk(KERN_WARNING "Couldn't query port\n");
361 return;
362 }
363
364 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
365 if (!new_ah) {
366 printk(KERN_WARNING "Couldn't allocate new SM AH\n");
367 return;
368 }
369
370 kref_init(&new_ah->ref);
371
372 memset(&ah_attr, 0, sizeof ah_attr);
373 ah_attr.dlid = port_attr.sm_lid;
374 ah_attr.sl = port_attr.sm_sl;
375 ah_attr.port_num = port->port_num;
376
377 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
378 if (IS_ERR(new_ah->ah)) {
379 printk(KERN_WARNING "Couldn't create new SM AH\n");
380 kfree(new_ah);
381 return;
382 }
383
384 spin_lock_irq(&port->ah_lock);
385 old_ah = port->sm_ah;
386 port->sm_ah = new_ah;
387 spin_unlock_irq(&port->ah_lock);
388
389 if (old_ah)
390 kref_put(&old_ah->ref, free_sm_ah);
391}
392
393static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
394{
395 if (event->event == IB_EVENT_PORT_ERR ||
396 event->event == IB_EVENT_PORT_ACTIVE ||
397 event->event == IB_EVENT_LID_CHANGE ||
398 event->event == IB_EVENT_PKEY_CHANGE ||
399 event->event == IB_EVENT_SM_CHANGE) {
400 struct ib_sa_device *sa_dev =
401 ib_get_client_data(event->device, &sa_client);
402
403 schedule_work(&sa_dev->port[event->element.port_num -
404 sa_dev->start_port].update_task);
405 }
406}
407
408/**
409 * ib_sa_cancel_query - try to cancel an SA query
410 * @id:ID of query to cancel
411 * @query:query pointer to cancel
412 *
413 * Try to cancel an SA query. If the id and query don't match up or
414 * the query has already completed, nothing is done. Otherwise the
415 * query is canceled and will complete with a status of -EINTR.
416 */
417void ib_sa_cancel_query(int id, struct ib_sa_query *query)
418{
419 unsigned long flags;
420 struct ib_mad_agent *agent;
421
422 spin_lock_irqsave(&idr_lock, flags);
423 if (idr_find(&query_idr, id) != query) {
424 spin_unlock_irqrestore(&idr_lock, flags);
425 return;
426 }
427 agent = query->port->agent;
428 spin_unlock_irqrestore(&idr_lock, flags);
429
430 ib_cancel_mad(agent, id);
431}
432EXPORT_SYMBOL(ib_sa_cancel_query);
433
434static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
435{
436 unsigned long flags;
437
438 memset(mad, 0, sizeof *mad);
439
440 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
441 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
442 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
443
444 spin_lock_irqsave(&tid_lock, flags);
445 mad->mad_hdr.tid =
446 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
447 spin_unlock_irqrestore(&tid_lock, flags);
448}
449
450static int send_mad(struct ib_sa_query *query, int timeout_ms)
451{
452 struct ib_sa_port *port = query->port;
453 unsigned long flags;
454 int ret;
455 struct ib_sge gather_list;
456 struct ib_send_wr *bad_wr, wr = {
457 .opcode = IB_WR_SEND,
458 .sg_list = &gather_list,
459 .num_sge = 1,
460 .send_flags = IB_SEND_SIGNALED,
461 .wr = {
462 .ud = {
463 .mad_hdr = &query->mad->mad_hdr,
464 .remote_qpn = 1,
465 .remote_qkey = IB_QP1_QKEY,
466 .timeout_ms = timeout_ms
467 }
468 }
469 };
470
471retry:
472 if (!idr_pre_get(&query_idr, GFP_ATOMIC))
473 return -ENOMEM;
474 spin_lock_irqsave(&idr_lock, flags);
475 ret = idr_get_new(&query_idr, query, &query->id);
476 spin_unlock_irqrestore(&idr_lock, flags);
477 if (ret == -EAGAIN)
478 goto retry;
479 if (ret)
480 return ret;
481
482 wr.wr_id = query->id;
483
484 spin_lock_irqsave(&port->ah_lock, flags);
485 kref_get(&port->sm_ah->ref);
486 query->sm_ah = port->sm_ah;
487 wr.wr.ud.ah = port->sm_ah->ah;
488 spin_unlock_irqrestore(&port->ah_lock, flags);
489
490 gather_list.addr = dma_map_single(port->agent->device->dma_device,
491 query->mad,
492 sizeof (struct ib_sa_mad),
493 DMA_TO_DEVICE);
494 gather_list.length = sizeof (struct ib_sa_mad);
495 gather_list.lkey = port->mr->lkey;
496 pci_unmap_addr_set(query, mapping, gather_list.addr);
497
498 ret = ib_post_send_mad(port->agent, &wr, &bad_wr);
499 if (ret) {
500 dma_unmap_single(port->agent->device->dma_device,
501 pci_unmap_addr(query, mapping),
502 sizeof (struct ib_sa_mad),
503 DMA_TO_DEVICE);
504 kref_put(&query->sm_ah->ref, free_sm_ah);
505 spin_lock_irqsave(&idr_lock, flags);
506 idr_remove(&query_idr, query->id);
507 spin_unlock_irqrestore(&idr_lock, flags);
508 }
509
510 return ret;
511}
512
513static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
514 int status,
515 struct ib_sa_mad *mad)
516{
517 struct ib_sa_path_query *query =
518 container_of(sa_query, struct ib_sa_path_query, sa_query);
519
520 if (mad) {
521 struct ib_sa_path_rec rec;
522
523 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
524 mad->data, &rec);
525 query->callback(status, &rec, query->context);
526 } else
527 query->callback(status, NULL, query->context);
528}
529
530static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
531{
532 kfree(sa_query->mad);
533 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
534}
535
536/**
537 * ib_sa_path_rec_get - Start a Path get query
538 * @device:device to send query on
539 * @port_num: port number to send query on
540 * @rec:Path Record to send in query
541 * @comp_mask:component mask to send in query
542 * @timeout_ms:time to wait for response
543 * @gfp_mask:GFP mask to use for internal allocations
544 * @callback:function called when query completes, times out or is
545 * canceled
546 * @context:opaque user context passed to callback
547 * @sa_query:query context, used to cancel query
548 *
549 * Send a Path Record Get query to the SA to look up a path. The
550 * callback function will be called when the query completes (or
551 * fails); status is 0 for a successful response, -EINTR if the query
552 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
553 * occurred sending the query. The resp parameter of the callback is
554 * only valid if status is 0.
555 *
556 * If the return value of ib_sa_path_rec_get() is negative, it is an
557 * error code. Otherwise it is a query ID that can be used to cancel
558 * the query.
559 */
560int ib_sa_path_rec_get(struct ib_device *device, u8 port_num,
561 struct ib_sa_path_rec *rec,
562 ib_sa_comp_mask comp_mask,
563 int timeout_ms, int gfp_mask,
564 void (*callback)(int status,
565 struct ib_sa_path_rec *resp,
566 void *context),
567 void *context,
568 struct ib_sa_query **sa_query)
569{
570 struct ib_sa_path_query *query;
571 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
572 struct ib_sa_port *port = &sa_dev->port[port_num - sa_dev->start_port];
573 struct ib_mad_agent *agent = port->agent;
574 int ret;
575
576 query = kmalloc(sizeof *query, gfp_mask);
577 if (!query)
578 return -ENOMEM;
579 query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask);
580 if (!query->sa_query.mad) {
581 kfree(query);
582 return -ENOMEM;
583 }
584
585 query->callback = callback;
586 query->context = context;
587
588 init_mad(query->sa_query.mad, agent);
589
590 query->sa_query.callback = ib_sa_path_rec_callback;
591 query->sa_query.release = ib_sa_path_rec_release;
592 query->sa_query.port = port;
593 query->sa_query.mad->mad_hdr.method = IB_MGMT_METHOD_GET;
594 query->sa_query.mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
595 query->sa_query.mad->sa_hdr.comp_mask = comp_mask;
596
597 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
598 rec, query->sa_query.mad->data);
599
600 *sa_query = &query->sa_query;
601 ret = send_mad(&query->sa_query, timeout_ms);
602 if (ret) {
603 *sa_query = NULL;
604 kfree(query->sa_query.mad);
605 kfree(query);
606 }
607
608 return ret ? ret : query->sa_query.id;
609}
610EXPORT_SYMBOL(ib_sa_path_rec_get);
611
612static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
613 int status,
614 struct ib_sa_mad *mad)
615{
616 struct ib_sa_mcmember_query *query =
617 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
618
619 if (mad) {
620 struct ib_sa_mcmember_rec rec;
621
622 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
623 mad->data, &rec);
624 query->callback(status, &rec, query->context);
625 } else
626 query->callback(status, NULL, query->context);
627}
628
629static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
630{
631 kfree(sa_query->mad);
632 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
633}
634
635int ib_sa_mcmember_rec_query(struct ib_device *device, u8 port_num,
636 u8 method,
637 struct ib_sa_mcmember_rec *rec,
638 ib_sa_comp_mask comp_mask,
639 int timeout_ms, int gfp_mask,
640 void (*callback)(int status,
641 struct ib_sa_mcmember_rec *resp,
642 void *context),
643 void *context,
644 struct ib_sa_query **sa_query)
645{
646 struct ib_sa_mcmember_query *query;
647 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
648 struct ib_sa_port *port = &sa_dev->port[port_num - sa_dev->start_port];
649 struct ib_mad_agent *agent = port->agent;
650 int ret;
651
652 query = kmalloc(sizeof *query, gfp_mask);
653 if (!query)
654 return -ENOMEM;
655 query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask);
656 if (!query->sa_query.mad) {
657 kfree(query);
658 return -ENOMEM;
659 }
660
661 query->callback = callback;
662 query->context = context;
663
664 init_mad(query->sa_query.mad, agent);
665
666 query->sa_query.callback = ib_sa_mcmember_rec_callback;
667 query->sa_query.release = ib_sa_mcmember_rec_release;
668 query->sa_query.port = port;
669 query->sa_query.mad->mad_hdr.method = method;
670 query->sa_query.mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
671 query->sa_query.mad->sa_hdr.comp_mask = comp_mask;
672
673 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
674 rec, query->sa_query.mad->data);
675
676 *sa_query = &query->sa_query;
677 ret = send_mad(&query->sa_query, timeout_ms);
678 if (ret) {
679 *sa_query = NULL;
680 kfree(query->sa_query.mad);
681 kfree(query);
682 }
683
684 return ret ? ret : query->sa_query.id;
685}
686EXPORT_SYMBOL(ib_sa_mcmember_rec_query);
687
688static void send_handler(struct ib_mad_agent *agent,
689 struct ib_mad_send_wc *mad_send_wc)
690{
691 struct ib_sa_query *query;
692 unsigned long flags;
693
694 spin_lock_irqsave(&idr_lock, flags);
695 query = idr_find(&query_idr, mad_send_wc->wr_id);
696 spin_unlock_irqrestore(&idr_lock, flags);
697
698 if (!query)
699 return;
700
701 switch (mad_send_wc->status) {
702 case IB_WC_SUCCESS:
703 /* No callback -- already got recv */
704 break;
705 case IB_WC_RESP_TIMEOUT_ERR:
706 query->callback(query, -ETIMEDOUT, NULL);
707 break;
708 case IB_WC_WR_FLUSH_ERR:
709 query->callback(query, -EINTR, NULL);
710 break;
711 default:
712 query->callback(query, -EIO, NULL);
713 break;
714 }
715
716 dma_unmap_single(agent->device->dma_device,
717 pci_unmap_addr(query, mapping),
718 sizeof (struct ib_sa_mad),
719 DMA_TO_DEVICE);
720 kref_put(&query->sm_ah->ref, free_sm_ah);
721
722 query->release(query);
723
724 spin_lock_irqsave(&idr_lock, flags);
725 idr_remove(&query_idr, mad_send_wc->wr_id);
726 spin_unlock_irqrestore(&idr_lock, flags);
727}
728
729static void recv_handler(struct ib_mad_agent *mad_agent,
730 struct ib_mad_recv_wc *mad_recv_wc)
731{
732 struct ib_sa_query *query;
733 unsigned long flags;
734
735 spin_lock_irqsave(&idr_lock, flags);
736 query = idr_find(&query_idr, mad_recv_wc->wc->wr_id);
737 spin_unlock_irqrestore(&idr_lock, flags);
738
739 if (query) {
740 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
741 query->callback(query,
742 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
743 -EINVAL : 0,
744 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
745 else
746 query->callback(query, -EIO, NULL);
747 }
748
749 ib_free_recv_mad(mad_recv_wc);
750}
751
752static void ib_sa_add_one(struct ib_device *device)
753{
754 struct ib_sa_device *sa_dev;
755 int s, e, i;
756
757 if (device->node_type == IB_NODE_SWITCH)
758 s = e = 0;
759 else {
760 s = 1;
761 e = device->phys_port_cnt;
762 }
763
764 sa_dev = kmalloc(sizeof *sa_dev +
765 (e - s + 1) * sizeof (struct ib_sa_port),
766 GFP_KERNEL);
767 if (!sa_dev)
768 return;
769
770 sa_dev->start_port = s;
771 sa_dev->end_port = e;
772
773 for (i = 0; i <= e - s; ++i) {
774 sa_dev->port[i].mr = NULL;
775 sa_dev->port[i].sm_ah = NULL;
776 sa_dev->port[i].port_num = i + s;
777 spin_lock_init(&sa_dev->port[i].ah_lock);
778
779 sa_dev->port[i].agent =
780 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
781 NULL, 0, send_handler,
782 recv_handler, sa_dev);
783 if (IS_ERR(sa_dev->port[i].agent))
784 goto err;
785
786 sa_dev->port[i].mr = ib_get_dma_mr(sa_dev->port[i].agent->qp->pd,
787 IB_ACCESS_LOCAL_WRITE);
788 if (IS_ERR(sa_dev->port[i].mr)) {
789 ib_unregister_mad_agent(sa_dev->port[i].agent);
790 goto err;
791 }
792
793 INIT_WORK(&sa_dev->port[i].update_task,
794 update_sm_ah, &sa_dev->port[i]);
795 }
796
797 ib_set_client_data(device, &sa_client, sa_dev);
798
799 /*
800 * We register our event handler after everything is set up,
801 * and then update our cached info after the event handler is
802 * registered to avoid any problems if a port changes state
803 * during our initialization.
804 */
805
806 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
807 if (ib_register_event_handler(&sa_dev->event_handler))
808 goto err;
809
810 for (i = 0; i <= e - s; ++i)
811 update_sm_ah(&sa_dev->port[i]);
812
813 return;
814
815err:
816 while (--i >= 0) {
817 ib_dereg_mr(sa_dev->port[i].mr);
818 ib_unregister_mad_agent(sa_dev->port[i].agent);
819 }
820
821 kfree(sa_dev);
822
823 return;
824}
825
826static void ib_sa_remove_one(struct ib_device *device)
827{
828 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
829 int i;
830
831 if (!sa_dev)
832 return;
833
834 ib_unregister_event_handler(&sa_dev->event_handler);
835
836 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
837 ib_unregister_mad_agent(sa_dev->port[i].agent);
838 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
839 }
840
841 kfree(sa_dev);
842}
843
844static int __init ib_sa_init(void)
845{
846 int ret;
847
848 spin_lock_init(&idr_lock);
849 spin_lock_init(&tid_lock);
850
851 get_random_bytes(&tid, sizeof tid);
852
853 ret = ib_register_client(&sa_client);
854 if (ret)
855 printk(KERN_ERR "Couldn't register ib_sa client\n");
856
857 return ret;
858}
859
860static void __exit ib_sa_cleanup(void)
861{
862 ib_unregister_client(&sa_client);
863}
864
865module_init(ib_sa_init);
866module_exit(ib_sa_cleanup);
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