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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 | |
52 | MODULE_AUTHOR("Roland Dreier"); | |
53 | MODULE_DESCRIPTION("InfiniBand subnet administration query support"); | |
54 | MODULE_LICENSE("Dual BSD/GPL"); | |
55 | ||
1da177e4 LT |
56 | struct ib_sa_sm_ah { |
57 | struct ib_ah *ah; | |
58 | struct kref ref; | |
59 | }; | |
60 | ||
61 | struct 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 | ||
69 | struct ib_sa_device { | |
70 | int start_port, end_port; | |
71 | struct ib_event_handler event_handler; | |
72 | struct ib_sa_port port[0]; | |
73 | }; | |
74 | ||
75 | struct ib_sa_query { | |
76 | void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *); | |
77 | void (*release)(struct ib_sa_query *); | |
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 |
84 | struct 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 |
90 | struct 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 | ||
96 | struct 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 | ||
102 | static void ib_sa_add_one(struct ib_device *device); | |
103 | static void ib_sa_remove_one(struct ib_device *device); | |
104 | ||
105 | static struct ib_client sa_client = { | |
106 | .name = "sa", | |
107 | .add = ib_sa_add_one, | |
108 | .remove = ib_sa_remove_one | |
109 | }; | |
110 | ||
111 | static spinlock_t idr_lock; | |
112 | static DEFINE_IDR(query_idr); | |
113 | ||
114 | static spinlock_t tid_lock; | |
115 | static 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 | ||
122 | static 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 | ||
226 | static 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 | ||
310 | static 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 |
353 | static 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 | ||
361 | static 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 | ||
402 | static 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 || | |
408 | event->event == IB_EVENT_SM_CHANGE) { | |
1d6801f9 MT |
409 | struct ib_sa_device *sa_dev; |
410 | sa_dev = container_of(handler, typeof(*sa_dev), event_handler); | |
1da177e4 LT |
411 | |
412 | schedule_work(&sa_dev->port[event->element.port_num - | |
413 | sa_dev->start_port].update_task); | |
414 | } | |
415 | } | |
416 | ||
417 | /** | |
418 | * ib_sa_cancel_query - try to cancel an SA query | |
419 | * @id:ID of query to cancel | |
420 | * @query:query pointer to cancel | |
421 | * | |
422 | * Try to cancel an SA query. If the id and query don't match up or | |
423 | * the query has already completed, nothing is done. Otherwise the | |
424 | * query is canceled and will complete with a status of -EINTR. | |
425 | */ | |
426 | void ib_sa_cancel_query(int id, struct ib_sa_query *query) | |
427 | { | |
428 | unsigned long flags; | |
429 | struct ib_mad_agent *agent; | |
34816ad9 | 430 | struct ib_mad_send_buf *mad_buf; |
1da177e4 LT |
431 | |
432 | spin_lock_irqsave(&idr_lock, flags); | |
433 | if (idr_find(&query_idr, id) != query) { | |
434 | spin_unlock_irqrestore(&idr_lock, flags); | |
435 | return; | |
436 | } | |
437 | agent = query->port->agent; | |
34816ad9 | 438 | mad_buf = query->mad_buf; |
1da177e4 LT |
439 | spin_unlock_irqrestore(&idr_lock, flags); |
440 | ||
34816ad9 | 441 | ib_cancel_mad(agent, mad_buf); |
1da177e4 LT |
442 | } |
443 | EXPORT_SYMBOL(ib_sa_cancel_query); | |
444 | ||
6d969a47 SH |
445 | int ib_init_ah_from_path(struct ib_device *device, u8 port_num, |
446 | struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr) | |
447 | { | |
448 | int ret; | |
449 | u16 gid_index; | |
450 | ||
451 | memset(ah_attr, 0, sizeof *ah_attr); | |
452 | ah_attr->dlid = be16_to_cpu(rec->dlid); | |
453 | ah_attr->sl = rec->sl; | |
454 | ah_attr->src_path_bits = be16_to_cpu(rec->slid) & 0x7f; | |
455 | ah_attr->port_num = port_num; | |
456 | ||
457 | if (rec->hop_limit > 1) { | |
458 | ah_attr->ah_flags = IB_AH_GRH; | |
459 | ah_attr->grh.dgid = rec->dgid; | |
460 | ||
461 | ret = ib_find_cached_gid(device, &rec->sgid, &port_num, | |
462 | &gid_index); | |
463 | if (ret) | |
464 | return ret; | |
465 | ||
ca222c6b SH |
466 | ah_attr->grh.sgid_index = gid_index; |
467 | ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label); | |
468 | ah_attr->grh.hop_limit = rec->hop_limit; | |
6d969a47 SH |
469 | ah_attr->grh.traffic_class = rec->traffic_class; |
470 | } | |
471 | return 0; | |
472 | } | |
473 | EXPORT_SYMBOL(ib_init_ah_from_path); | |
474 | ||
1da177e4 LT |
475 | static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent) |
476 | { | |
477 | unsigned long flags; | |
478 | ||
479 | memset(mad, 0, sizeof *mad); | |
480 | ||
481 | mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION; | |
482 | mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM; | |
483 | mad->mad_hdr.class_version = IB_SA_CLASS_VERSION; | |
484 | ||
485 | spin_lock_irqsave(&tid_lock, flags); | |
486 | mad->mad_hdr.tid = | |
487 | cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++); | |
488 | spin_unlock_irqrestore(&tid_lock, flags); | |
489 | } | |
490 | ||
491 | static int send_mad(struct ib_sa_query *query, int timeout_ms) | |
492 | { | |
1da177e4 | 493 | unsigned long flags; |
34816ad9 | 494 | int ret, id; |
1da177e4 LT |
495 | |
496 | retry: | |
497 | if (!idr_pre_get(&query_idr, GFP_ATOMIC)) | |
498 | return -ENOMEM; | |
499 | spin_lock_irqsave(&idr_lock, flags); | |
34816ad9 | 500 | ret = idr_get_new(&query_idr, query, &id); |
1da177e4 LT |
501 | spin_unlock_irqrestore(&idr_lock, flags); |
502 | if (ret == -EAGAIN) | |
503 | goto retry; | |
504 | if (ret) | |
505 | return ret; | |
506 | ||
34816ad9 SH |
507 | query->mad_buf->timeout_ms = timeout_ms; |
508 | query->mad_buf->context[0] = query; | |
509 | query->id = id; | |
1da177e4 | 510 | |
34816ad9 SH |
511 | spin_lock_irqsave(&query->port->ah_lock, flags); |
512 | kref_get(&query->port->sm_ah->ref); | |
513 | query->sm_ah = query->port->sm_ah; | |
514 | spin_unlock_irqrestore(&query->port->ah_lock, flags); | |
1da177e4 | 515 | |
34816ad9 | 516 | query->mad_buf->ah = query->sm_ah->ah; |
1da177e4 | 517 | |
34816ad9 | 518 | ret = ib_post_send_mad(query->mad_buf, NULL); |
1da177e4 | 519 | if (ret) { |
1da177e4 | 520 | spin_lock_irqsave(&idr_lock, flags); |
34816ad9 | 521 | idr_remove(&query_idr, id); |
1da177e4 | 522 | spin_unlock_irqrestore(&idr_lock, flags); |
34816ad9 SH |
523 | |
524 | kref_put(&query->sm_ah->ref, free_sm_ah); | |
1da177e4 LT |
525 | } |
526 | ||
dae4c1d2 RD |
527 | /* |
528 | * It's not safe to dereference query any more, because the | |
529 | * send may already have completed and freed the query in | |
34816ad9 | 530 | * another context. |
dae4c1d2 | 531 | */ |
34816ad9 | 532 | return ret ? ret : id; |
1da177e4 LT |
533 | } |
534 | ||
535 | static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query, | |
536 | int status, | |
537 | struct ib_sa_mad *mad) | |
538 | { | |
539 | struct ib_sa_path_query *query = | |
540 | container_of(sa_query, struct ib_sa_path_query, sa_query); | |
541 | ||
542 | if (mad) { | |
543 | struct ib_sa_path_rec rec; | |
544 | ||
545 | ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), | |
546 | mad->data, &rec); | |
547 | query->callback(status, &rec, query->context); | |
548 | } else | |
549 | query->callback(status, NULL, query->context); | |
550 | } | |
551 | ||
552 | static void ib_sa_path_rec_release(struct ib_sa_query *sa_query) | |
553 | { | |
1da177e4 LT |
554 | kfree(container_of(sa_query, struct ib_sa_path_query, sa_query)); |
555 | } | |
556 | ||
557 | /** | |
558 | * ib_sa_path_rec_get - Start a Path get query | |
559 | * @device:device to send query on | |
560 | * @port_num: port number to send query on | |
561 | * @rec:Path Record to send in query | |
562 | * @comp_mask:component mask to send in query | |
563 | * @timeout_ms:time to wait for response | |
564 | * @gfp_mask:GFP mask to use for internal allocations | |
565 | * @callback:function called when query completes, times out or is | |
566 | * canceled | |
567 | * @context:opaque user context passed to callback | |
568 | * @sa_query:query context, used to cancel query | |
569 | * | |
570 | * Send a Path Record Get query to the SA to look up a path. The | |
571 | * callback function will be called when the query completes (or | |
572 | * fails); status is 0 for a successful response, -EINTR if the query | |
573 | * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error | |
574 | * occurred sending the query. The resp parameter of the callback is | |
575 | * only valid if status is 0. | |
576 | * | |
577 | * If the return value of ib_sa_path_rec_get() is negative, it is an | |
578 | * error code. Otherwise it is a query ID that can be used to cancel | |
579 | * the query. | |
580 | */ | |
581 | int ib_sa_path_rec_get(struct ib_device *device, u8 port_num, | |
582 | struct ib_sa_path_rec *rec, | |
583 | ib_sa_comp_mask comp_mask, | |
dd0fc66f | 584 | int timeout_ms, gfp_t gfp_mask, |
1da177e4 LT |
585 | void (*callback)(int status, |
586 | struct ib_sa_path_rec *resp, | |
587 | void *context), | |
588 | void *context, | |
589 | struct ib_sa_query **sa_query) | |
590 | { | |
591 | struct ib_sa_path_query *query; | |
592 | struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); | |
56c202d6 RD |
593 | struct ib_sa_port *port; |
594 | struct ib_mad_agent *agent; | |
34816ad9 | 595 | struct ib_sa_mad *mad; |
1da177e4 LT |
596 | int ret; |
597 | ||
56c202d6 RD |
598 | if (!sa_dev) |
599 | return -ENODEV; | |
600 | ||
601 | port = &sa_dev->port[port_num - sa_dev->start_port]; | |
602 | agent = port->agent; | |
603 | ||
1da177e4 LT |
604 | query = kmalloc(sizeof *query, gfp_mask); |
605 | if (!query) | |
606 | return -ENOMEM; | |
34816ad9 SH |
607 | |
608 | query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0, | |
609 | 0, IB_MGMT_SA_HDR, | |
610 | IB_MGMT_SA_DATA, gfp_mask); | |
611 | if (!query->sa_query.mad_buf) { | |
612 | ret = -ENOMEM; | |
613 | goto err1; | |
1da177e4 LT |
614 | } |
615 | ||
616 | query->callback = callback; | |
617 | query->context = context; | |
618 | ||
34816ad9 SH |
619 | mad = query->sa_query.mad_buf->mad; |
620 | init_mad(mad, agent); | |
1da177e4 | 621 | |
34816ad9 SH |
622 | query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL; |
623 | query->sa_query.release = ib_sa_path_rec_release; | |
624 | query->sa_query.port = port; | |
625 | mad->mad_hdr.method = IB_MGMT_METHOD_GET; | |
626 | mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC); | |
627 | mad->sa_hdr.comp_mask = comp_mask; | |
1da177e4 | 628 | |
34816ad9 | 629 | ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data); |
1da177e4 LT |
630 | |
631 | *sa_query = &query->sa_query; | |
dae4c1d2 | 632 | |
1da177e4 | 633 | ret = send_mad(&query->sa_query, timeout_ms); |
34816ad9 SH |
634 | if (ret < 0) |
635 | goto err2; | |
636 | ||
637 | return ret; | |
638 | ||
639 | err2: | |
640 | *sa_query = NULL; | |
641 | ib_free_send_mad(query->sa_query.mad_buf); | |
1da177e4 | 642 | |
34816ad9 SH |
643 | err1: |
644 | kfree(query); | |
dae4c1d2 | 645 | return ret; |
1da177e4 LT |
646 | } |
647 | EXPORT_SYMBOL(ib_sa_path_rec_get); | |
648 | ||
cbae32c5 HR |
649 | static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query, |
650 | int status, | |
651 | struct ib_sa_mad *mad) | |
652 | { | |
653 | struct ib_sa_service_query *query = | |
654 | container_of(sa_query, struct ib_sa_service_query, sa_query); | |
655 | ||
656 | if (mad) { | |
657 | struct ib_sa_service_rec rec; | |
658 | ||
659 | ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table), | |
660 | mad->data, &rec); | |
661 | query->callback(status, &rec, query->context); | |
662 | } else | |
663 | query->callback(status, NULL, query->context); | |
664 | } | |
665 | ||
666 | static void ib_sa_service_rec_release(struct ib_sa_query *sa_query) | |
667 | { | |
cbae32c5 HR |
668 | kfree(container_of(sa_query, struct ib_sa_service_query, sa_query)); |
669 | } | |
670 | ||
671 | /** | |
672 | * ib_sa_service_rec_query - Start Service Record operation | |
673 | * @device:device to send request on | |
674 | * @port_num: port number to send request on | |
675 | * @method:SA method - should be get, set, or delete | |
676 | * @rec:Service Record to send in request | |
677 | * @comp_mask:component mask to send in request | |
678 | * @timeout_ms:time to wait for response | |
679 | * @gfp_mask:GFP mask to use for internal allocations | |
680 | * @callback:function called when request completes, times out or is | |
681 | * canceled | |
682 | * @context:opaque user context passed to callback | |
683 | * @sa_query:request context, used to cancel request | |
684 | * | |
685 | * Send a Service Record set/get/delete to the SA to register, | |
686 | * unregister or query a service record. | |
687 | * The callback function will be called when the request completes (or | |
688 | * fails); status is 0 for a successful response, -EINTR if the query | |
689 | * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error | |
690 | * occurred sending the query. The resp parameter of the callback is | |
691 | * only valid if status is 0. | |
692 | * | |
693 | * If the return value of ib_sa_service_rec_query() is negative, it is an | |
694 | * error code. Otherwise it is a request ID that can be used to cancel | |
695 | * the query. | |
696 | */ | |
697 | int ib_sa_service_rec_query(struct ib_device *device, u8 port_num, u8 method, | |
698 | struct ib_sa_service_rec *rec, | |
699 | ib_sa_comp_mask comp_mask, | |
dd0fc66f | 700 | int timeout_ms, gfp_t gfp_mask, |
cbae32c5 HR |
701 | void (*callback)(int status, |
702 | struct ib_sa_service_rec *resp, | |
703 | void *context), | |
704 | void *context, | |
705 | struct ib_sa_query **sa_query) | |
706 | { | |
707 | struct ib_sa_service_query *query; | |
708 | struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); | |
56c202d6 RD |
709 | struct ib_sa_port *port; |
710 | struct ib_mad_agent *agent; | |
34816ad9 | 711 | struct ib_sa_mad *mad; |
cbae32c5 HR |
712 | int ret; |
713 | ||
56c202d6 RD |
714 | if (!sa_dev) |
715 | return -ENODEV; | |
716 | ||
717 | port = &sa_dev->port[port_num - sa_dev->start_port]; | |
718 | agent = port->agent; | |
719 | ||
cbae32c5 HR |
720 | if (method != IB_MGMT_METHOD_GET && |
721 | method != IB_MGMT_METHOD_SET && | |
722 | method != IB_SA_METHOD_DELETE) | |
723 | return -EINVAL; | |
724 | ||
725 | query = kmalloc(sizeof *query, gfp_mask); | |
726 | if (!query) | |
727 | return -ENOMEM; | |
34816ad9 SH |
728 | |
729 | query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0, | |
730 | 0, IB_MGMT_SA_HDR, | |
731 | IB_MGMT_SA_DATA, gfp_mask); | |
732 | if (!query->sa_query.mad_buf) { | |
733 | ret = -ENOMEM; | |
734 | goto err1; | |
cbae32c5 HR |
735 | } |
736 | ||
737 | query->callback = callback; | |
738 | query->context = context; | |
739 | ||
34816ad9 SH |
740 | mad = query->sa_query.mad_buf->mad; |
741 | init_mad(mad, agent); | |
cbae32c5 | 742 | |
34816ad9 SH |
743 | query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL; |
744 | query->sa_query.release = ib_sa_service_rec_release; | |
745 | query->sa_query.port = port; | |
746 | mad->mad_hdr.method = method; | |
747 | mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC); | |
748 | mad->sa_hdr.comp_mask = comp_mask; | |
cbae32c5 HR |
749 | |
750 | ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table), | |
34816ad9 | 751 | rec, mad->data); |
cbae32c5 HR |
752 | |
753 | *sa_query = &query->sa_query; | |
754 | ||
755 | ret = send_mad(&query->sa_query, timeout_ms); | |
34816ad9 SH |
756 | if (ret < 0) |
757 | goto err2; | |
758 | ||
759 | return ret; | |
cbae32c5 | 760 | |
34816ad9 SH |
761 | err2: |
762 | *sa_query = NULL; | |
763 | ib_free_send_mad(query->sa_query.mad_buf); | |
764 | ||
765 | err1: | |
766 | kfree(query); | |
cbae32c5 HR |
767 | return ret; |
768 | } | |
769 | EXPORT_SYMBOL(ib_sa_service_rec_query); | |
770 | ||
1da177e4 LT |
771 | static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query, |
772 | int status, | |
773 | struct ib_sa_mad *mad) | |
774 | { | |
775 | struct ib_sa_mcmember_query *query = | |
776 | container_of(sa_query, struct ib_sa_mcmember_query, sa_query); | |
777 | ||
778 | if (mad) { | |
779 | struct ib_sa_mcmember_rec rec; | |
780 | ||
781 | ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), | |
782 | mad->data, &rec); | |
783 | query->callback(status, &rec, query->context); | |
784 | } else | |
785 | query->callback(status, NULL, query->context); | |
786 | } | |
787 | ||
788 | static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query) | |
789 | { | |
1da177e4 LT |
790 | kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query)); |
791 | } | |
792 | ||
793 | int ib_sa_mcmember_rec_query(struct ib_device *device, u8 port_num, | |
794 | u8 method, | |
795 | struct ib_sa_mcmember_rec *rec, | |
796 | ib_sa_comp_mask comp_mask, | |
dd0fc66f | 797 | int timeout_ms, gfp_t gfp_mask, |
1da177e4 LT |
798 | void (*callback)(int status, |
799 | struct ib_sa_mcmember_rec *resp, | |
800 | void *context), | |
801 | void *context, | |
802 | struct ib_sa_query **sa_query) | |
803 | { | |
804 | struct ib_sa_mcmember_query *query; | |
805 | struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); | |
56c202d6 RD |
806 | struct ib_sa_port *port; |
807 | struct ib_mad_agent *agent; | |
34816ad9 | 808 | struct ib_sa_mad *mad; |
1da177e4 LT |
809 | int ret; |
810 | ||
56c202d6 RD |
811 | if (!sa_dev) |
812 | return -ENODEV; | |
813 | ||
814 | port = &sa_dev->port[port_num - sa_dev->start_port]; | |
815 | agent = port->agent; | |
816 | ||
1da177e4 LT |
817 | query = kmalloc(sizeof *query, gfp_mask); |
818 | if (!query) | |
819 | return -ENOMEM; | |
34816ad9 SH |
820 | |
821 | query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0, | |
822 | 0, IB_MGMT_SA_HDR, | |
823 | IB_MGMT_SA_DATA, gfp_mask); | |
824 | if (!query->sa_query.mad_buf) { | |
825 | ret = -ENOMEM; | |
826 | goto err1; | |
1da177e4 LT |
827 | } |
828 | ||
829 | query->callback = callback; | |
830 | query->context = context; | |
831 | ||
34816ad9 SH |
832 | mad = query->sa_query.mad_buf->mad; |
833 | init_mad(mad, agent); | |
1da177e4 | 834 | |
34816ad9 SH |
835 | query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL; |
836 | query->sa_query.release = ib_sa_mcmember_rec_release; | |
837 | query->sa_query.port = port; | |
838 | mad->mad_hdr.method = method; | |
839 | mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC); | |
840 | mad->sa_hdr.comp_mask = comp_mask; | |
1da177e4 LT |
841 | |
842 | ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), | |
34816ad9 | 843 | rec, mad->data); |
1da177e4 LT |
844 | |
845 | *sa_query = &query->sa_query; | |
dae4c1d2 | 846 | |
1da177e4 | 847 | ret = send_mad(&query->sa_query, timeout_ms); |
34816ad9 SH |
848 | if (ret < 0) |
849 | goto err2; | |
1da177e4 | 850 | |
dae4c1d2 | 851 | return ret; |
34816ad9 SH |
852 | |
853 | err2: | |
854 | *sa_query = NULL; | |
855 | ib_free_send_mad(query->sa_query.mad_buf); | |
856 | ||
857 | err1: | |
858 | kfree(query); | |
859 | return ret; | |
1da177e4 LT |
860 | } |
861 | EXPORT_SYMBOL(ib_sa_mcmember_rec_query); | |
862 | ||
863 | static void send_handler(struct ib_mad_agent *agent, | |
864 | struct ib_mad_send_wc *mad_send_wc) | |
865 | { | |
34816ad9 | 866 | struct ib_sa_query *query = mad_send_wc->send_buf->context[0]; |
1da177e4 LT |
867 | unsigned long flags; |
868 | ||
e4f50f00 RD |
869 | if (query->callback) |
870 | switch (mad_send_wc->status) { | |
871 | case IB_WC_SUCCESS: | |
872 | /* No callback -- already got recv */ | |
873 | break; | |
874 | case IB_WC_RESP_TIMEOUT_ERR: | |
875 | query->callback(query, -ETIMEDOUT, NULL); | |
876 | break; | |
877 | case IB_WC_WR_FLUSH_ERR: | |
878 | query->callback(query, -EINTR, NULL); | |
879 | break; | |
880 | default: | |
881 | query->callback(query, -EIO, NULL); | |
882 | break; | |
883 | } | |
1da177e4 | 884 | |
1da177e4 | 885 | spin_lock_irqsave(&idr_lock, flags); |
34816ad9 | 886 | idr_remove(&query_idr, query->id); |
1da177e4 | 887 | spin_unlock_irqrestore(&idr_lock, flags); |
34816ad9 SH |
888 | |
889 | ib_free_send_mad(mad_send_wc->send_buf); | |
890 | kref_put(&query->sm_ah->ref, free_sm_ah); | |
891 | query->release(query); | |
1da177e4 LT |
892 | } |
893 | ||
894 | static void recv_handler(struct ib_mad_agent *mad_agent, | |
895 | struct ib_mad_recv_wc *mad_recv_wc) | |
896 | { | |
897 | struct ib_sa_query *query; | |
34816ad9 | 898 | struct ib_mad_send_buf *mad_buf; |
1da177e4 | 899 | |
34816ad9 SH |
900 | mad_buf = (void *) (unsigned long) mad_recv_wc->wc->wr_id; |
901 | query = mad_buf->context[0]; | |
1da177e4 | 902 | |
34816ad9 | 903 | if (query->callback) { |
1da177e4 LT |
904 | if (mad_recv_wc->wc->status == IB_WC_SUCCESS) |
905 | query->callback(query, | |
906 | mad_recv_wc->recv_buf.mad->mad_hdr.status ? | |
907 | -EINVAL : 0, | |
908 | (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad); | |
909 | else | |
910 | query->callback(query, -EIO, NULL); | |
911 | } | |
912 | ||
913 | ib_free_recv_mad(mad_recv_wc); | |
914 | } | |
915 | ||
916 | static void ib_sa_add_one(struct ib_device *device) | |
917 | { | |
918 | struct ib_sa_device *sa_dev; | |
919 | int s, e, i; | |
920 | ||
921 | if (device->node_type == IB_NODE_SWITCH) | |
922 | s = e = 0; | |
923 | else { | |
924 | s = 1; | |
925 | e = device->phys_port_cnt; | |
926 | } | |
927 | ||
928 | sa_dev = kmalloc(sizeof *sa_dev + | |
929 | (e - s + 1) * sizeof (struct ib_sa_port), | |
930 | GFP_KERNEL); | |
931 | if (!sa_dev) | |
932 | return; | |
933 | ||
934 | sa_dev->start_port = s; | |
935 | sa_dev->end_port = e; | |
936 | ||
937 | for (i = 0; i <= e - s; ++i) { | |
1da177e4 LT |
938 | sa_dev->port[i].sm_ah = NULL; |
939 | sa_dev->port[i].port_num = i + s; | |
940 | spin_lock_init(&sa_dev->port[i].ah_lock); | |
941 | ||
942 | sa_dev->port[i].agent = | |
943 | ib_register_mad_agent(device, i + s, IB_QPT_GSI, | |
944 | NULL, 0, send_handler, | |
945 | recv_handler, sa_dev); | |
946 | if (IS_ERR(sa_dev->port[i].agent)) | |
947 | goto err; | |
948 | ||
1da177e4 LT |
949 | INIT_WORK(&sa_dev->port[i].update_task, |
950 | update_sm_ah, &sa_dev->port[i]); | |
951 | } | |
952 | ||
953 | ib_set_client_data(device, &sa_client, sa_dev); | |
954 | ||
955 | /* | |
956 | * We register our event handler after everything is set up, | |
957 | * and then update our cached info after the event handler is | |
958 | * registered to avoid any problems if a port changes state | |
959 | * during our initialization. | |
960 | */ | |
961 | ||
962 | INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event); | |
963 | if (ib_register_event_handler(&sa_dev->event_handler)) | |
964 | goto err; | |
965 | ||
966 | for (i = 0; i <= e - s; ++i) | |
967 | update_sm_ah(&sa_dev->port[i]); | |
968 | ||
969 | return; | |
970 | ||
971 | err: | |
b82cab6b | 972 | while (--i >= 0) |
1da177e4 | 973 | ib_unregister_mad_agent(sa_dev->port[i].agent); |
1da177e4 LT |
974 | |
975 | kfree(sa_dev); | |
976 | ||
977 | return; | |
978 | } | |
979 | ||
980 | static void ib_sa_remove_one(struct ib_device *device) | |
981 | { | |
982 | struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); | |
983 | int i; | |
984 | ||
985 | if (!sa_dev) | |
986 | return; | |
987 | ||
988 | ib_unregister_event_handler(&sa_dev->event_handler); | |
989 | ||
0f47ae0b MT |
990 | flush_scheduled_work(); |
991 | ||
1da177e4 LT |
992 | for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) { |
993 | ib_unregister_mad_agent(sa_dev->port[i].agent); | |
994 | kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah); | |
995 | } | |
996 | ||
997 | kfree(sa_dev); | |
998 | } | |
999 | ||
1000 | static int __init ib_sa_init(void) | |
1001 | { | |
1002 | int ret; | |
1003 | ||
1004 | spin_lock_init(&idr_lock); | |
1005 | spin_lock_init(&tid_lock); | |
1006 | ||
1007 | get_random_bytes(&tid, sizeof tid); | |
1008 | ||
1009 | ret = ib_register_client(&sa_client); | |
1010 | if (ret) | |
1011 | printk(KERN_ERR "Couldn't register ib_sa client\n"); | |
1012 | ||
1013 | return ret; | |
1014 | } | |
1015 | ||
1016 | static void __exit ib_sa_cleanup(void) | |
1017 | { | |
1018 | ib_unregister_client(&sa_client); | |
5d7edb3c | 1019 | idr_destroy(&query_idr); |
1da177e4 LT |
1020 | } |
1021 | ||
1022 | module_init(ib_sa_init); | |
1023 | module_exit(ib_sa_cleanup); |