Commit | Line | Data |
---|---|---|
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> | |
46 | ||
47 | #include <ib_pack.h> | |
48 | #include <ib_sa.h> | |
49 | ||
50 | MODULE_AUTHOR("Roland Dreier"); | |
51 | MODULE_DESCRIPTION("InfiniBand subnet administration query support"); | |
52 | MODULE_LICENSE("Dual BSD/GPL"); | |
53 | ||
1da177e4 LT |
54 | struct ib_sa_sm_ah { |
55 | struct ib_ah *ah; | |
56 | struct kref ref; | |
57 | }; | |
58 | ||
59 | struct ib_sa_port { | |
60 | struct ib_mad_agent *agent; | |
1da177e4 LT |
61 | struct ib_sa_sm_ah *sm_ah; |
62 | struct work_struct update_task; | |
63 | spinlock_t ah_lock; | |
64 | u8 port_num; | |
65 | }; | |
66 | ||
67 | struct ib_sa_device { | |
68 | int start_port, end_port; | |
69 | struct ib_event_handler event_handler; | |
70 | struct ib_sa_port port[0]; | |
71 | }; | |
72 | ||
73 | struct ib_sa_query { | |
74 | void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *); | |
75 | void (*release)(struct ib_sa_query *); | |
76 | struct ib_sa_port *port; | |
77 | struct ib_sa_mad *mad; | |
78 | struct ib_sa_sm_ah *sm_ah; | |
79 | DECLARE_PCI_UNMAP_ADDR(mapping) | |
80 | int id; | |
81 | }; | |
82 | ||
cbae32c5 HR |
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 | ||
1da177e4 LT |
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 | enum { | |
117 | IB_SA_ATTR_CLASS_PORTINFO = 0x01, | |
118 | IB_SA_ATTR_NOTICE = 0x02, | |
119 | IB_SA_ATTR_INFORM_INFO = 0x03, | |
120 | IB_SA_ATTR_NODE_REC = 0x11, | |
121 | IB_SA_ATTR_PORT_INFO_REC = 0x12, | |
122 | IB_SA_ATTR_SL2VL_REC = 0x13, | |
123 | IB_SA_ATTR_SWITCH_REC = 0x14, | |
124 | IB_SA_ATTR_LINEAR_FDB_REC = 0x15, | |
125 | IB_SA_ATTR_RANDOM_FDB_REC = 0x16, | |
126 | IB_SA_ATTR_MCAST_FDB_REC = 0x17, | |
127 | IB_SA_ATTR_SM_INFO_REC = 0x18, | |
128 | IB_SA_ATTR_LINK_REC = 0x20, | |
129 | IB_SA_ATTR_GUID_INFO_REC = 0x30, | |
130 | IB_SA_ATTR_SERVICE_REC = 0x31, | |
131 | IB_SA_ATTR_PARTITION_REC = 0x33, | |
132 | IB_SA_ATTR_RANGE_REC = 0x34, | |
133 | IB_SA_ATTR_PATH_REC = 0x35, | |
134 | IB_SA_ATTR_VL_ARB_REC = 0x36, | |
135 | IB_SA_ATTR_MC_GROUP_REC = 0x37, | |
136 | IB_SA_ATTR_MC_MEMBER_REC = 0x38, | |
137 | IB_SA_ATTR_TRACE_REC = 0x39, | |
138 | IB_SA_ATTR_MULTI_PATH_REC = 0x3a, | |
139 | IB_SA_ATTR_SERVICE_ASSOC_REC = 0x3b | |
140 | }; | |
141 | ||
142 | #define PATH_REC_FIELD(field) \ | |
143 | .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \ | |
144 | .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \ | |
145 | .field_name = "sa_path_rec:" #field | |
146 | ||
147 | static const struct ib_field path_rec_table[] = { | |
148 | { RESERVED, | |
149 | .offset_words = 0, | |
150 | .offset_bits = 0, | |
151 | .size_bits = 32 }, | |
152 | { RESERVED, | |
153 | .offset_words = 1, | |
154 | .offset_bits = 0, | |
155 | .size_bits = 32 }, | |
156 | { PATH_REC_FIELD(dgid), | |
157 | .offset_words = 2, | |
158 | .offset_bits = 0, | |
159 | .size_bits = 128 }, | |
160 | { PATH_REC_FIELD(sgid), | |
161 | .offset_words = 6, | |
162 | .offset_bits = 0, | |
163 | .size_bits = 128 }, | |
164 | { PATH_REC_FIELD(dlid), | |
165 | .offset_words = 10, | |
166 | .offset_bits = 0, | |
167 | .size_bits = 16 }, | |
168 | { PATH_REC_FIELD(slid), | |
169 | .offset_words = 10, | |
170 | .offset_bits = 16, | |
171 | .size_bits = 16 }, | |
172 | { PATH_REC_FIELD(raw_traffic), | |
173 | .offset_words = 11, | |
174 | .offset_bits = 0, | |
175 | .size_bits = 1 }, | |
176 | { RESERVED, | |
177 | .offset_words = 11, | |
178 | .offset_bits = 1, | |
179 | .size_bits = 3 }, | |
180 | { PATH_REC_FIELD(flow_label), | |
181 | .offset_words = 11, | |
182 | .offset_bits = 4, | |
183 | .size_bits = 20 }, | |
184 | { PATH_REC_FIELD(hop_limit), | |
185 | .offset_words = 11, | |
186 | .offset_bits = 24, | |
187 | .size_bits = 8 }, | |
188 | { PATH_REC_FIELD(traffic_class), | |
189 | .offset_words = 12, | |
190 | .offset_bits = 0, | |
191 | .size_bits = 8 }, | |
192 | { PATH_REC_FIELD(reversible), | |
193 | .offset_words = 12, | |
194 | .offset_bits = 8, | |
195 | .size_bits = 1 }, | |
196 | { PATH_REC_FIELD(numb_path), | |
197 | .offset_words = 12, | |
198 | .offset_bits = 9, | |
199 | .size_bits = 7 }, | |
200 | { PATH_REC_FIELD(pkey), | |
201 | .offset_words = 12, | |
202 | .offset_bits = 16, | |
203 | .size_bits = 16 }, | |
204 | { RESERVED, | |
205 | .offset_words = 13, | |
206 | .offset_bits = 0, | |
207 | .size_bits = 12 }, | |
208 | { PATH_REC_FIELD(sl), | |
209 | .offset_words = 13, | |
210 | .offset_bits = 12, | |
211 | .size_bits = 4 }, | |
212 | { PATH_REC_FIELD(mtu_selector), | |
213 | .offset_words = 13, | |
214 | .offset_bits = 16, | |
215 | .size_bits = 2 }, | |
216 | { PATH_REC_FIELD(mtu), | |
217 | .offset_words = 13, | |
218 | .offset_bits = 18, | |
219 | .size_bits = 6 }, | |
220 | { PATH_REC_FIELD(rate_selector), | |
221 | .offset_words = 13, | |
222 | .offset_bits = 24, | |
223 | .size_bits = 2 }, | |
224 | { PATH_REC_FIELD(rate), | |
225 | .offset_words = 13, | |
226 | .offset_bits = 26, | |
227 | .size_bits = 6 }, | |
228 | { PATH_REC_FIELD(packet_life_time_selector), | |
229 | .offset_words = 14, | |
230 | .offset_bits = 0, | |
231 | .size_bits = 2 }, | |
232 | { PATH_REC_FIELD(packet_life_time), | |
233 | .offset_words = 14, | |
234 | .offset_bits = 2, | |
235 | .size_bits = 6 }, | |
236 | { PATH_REC_FIELD(preference), | |
237 | .offset_words = 14, | |
238 | .offset_bits = 8, | |
239 | .size_bits = 8 }, | |
240 | { RESERVED, | |
241 | .offset_words = 14, | |
242 | .offset_bits = 16, | |
243 | .size_bits = 48 }, | |
244 | }; | |
245 | ||
246 | #define MCMEMBER_REC_FIELD(field) \ | |
247 | .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \ | |
248 | .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \ | |
249 | .field_name = "sa_mcmember_rec:" #field | |
250 | ||
251 | static const struct ib_field mcmember_rec_table[] = { | |
252 | { MCMEMBER_REC_FIELD(mgid), | |
253 | .offset_words = 0, | |
254 | .offset_bits = 0, | |
255 | .size_bits = 128 }, | |
256 | { MCMEMBER_REC_FIELD(port_gid), | |
257 | .offset_words = 4, | |
258 | .offset_bits = 0, | |
259 | .size_bits = 128 }, | |
260 | { MCMEMBER_REC_FIELD(qkey), | |
261 | .offset_words = 8, | |
262 | .offset_bits = 0, | |
263 | .size_bits = 32 }, | |
264 | { MCMEMBER_REC_FIELD(mlid), | |
265 | .offset_words = 9, | |
266 | .offset_bits = 0, | |
267 | .size_bits = 16 }, | |
268 | { MCMEMBER_REC_FIELD(mtu_selector), | |
269 | .offset_words = 9, | |
270 | .offset_bits = 16, | |
271 | .size_bits = 2 }, | |
272 | { MCMEMBER_REC_FIELD(mtu), | |
273 | .offset_words = 9, | |
274 | .offset_bits = 18, | |
275 | .size_bits = 6 }, | |
276 | { MCMEMBER_REC_FIELD(traffic_class), | |
277 | .offset_words = 9, | |
278 | .offset_bits = 24, | |
279 | .size_bits = 8 }, | |
280 | { MCMEMBER_REC_FIELD(pkey), | |
281 | .offset_words = 10, | |
282 | .offset_bits = 0, | |
283 | .size_bits = 16 }, | |
284 | { MCMEMBER_REC_FIELD(rate_selector), | |
285 | .offset_words = 10, | |
286 | .offset_bits = 16, | |
287 | .size_bits = 2 }, | |
288 | { MCMEMBER_REC_FIELD(rate), | |
289 | .offset_words = 10, | |
290 | .offset_bits = 18, | |
291 | .size_bits = 6 }, | |
292 | { MCMEMBER_REC_FIELD(packet_life_time_selector), | |
293 | .offset_words = 10, | |
294 | .offset_bits = 24, | |
295 | .size_bits = 2 }, | |
296 | { MCMEMBER_REC_FIELD(packet_life_time), | |
297 | .offset_words = 10, | |
298 | .offset_bits = 26, | |
299 | .size_bits = 6 }, | |
300 | { MCMEMBER_REC_FIELD(sl), | |
301 | .offset_words = 11, | |
302 | .offset_bits = 0, | |
303 | .size_bits = 4 }, | |
304 | { MCMEMBER_REC_FIELD(flow_label), | |
305 | .offset_words = 11, | |
306 | .offset_bits = 4, | |
307 | .size_bits = 20 }, | |
308 | { MCMEMBER_REC_FIELD(hop_limit), | |
309 | .offset_words = 11, | |
310 | .offset_bits = 24, | |
311 | .size_bits = 8 }, | |
312 | { MCMEMBER_REC_FIELD(scope), | |
313 | .offset_words = 12, | |
314 | .offset_bits = 0, | |
315 | .size_bits = 4 }, | |
316 | { MCMEMBER_REC_FIELD(join_state), | |
317 | .offset_words = 12, | |
318 | .offset_bits = 4, | |
319 | .size_bits = 4 }, | |
320 | { MCMEMBER_REC_FIELD(proxy_join), | |
321 | .offset_words = 12, | |
322 | .offset_bits = 8, | |
323 | .size_bits = 1 }, | |
324 | { RESERVED, | |
325 | .offset_words = 12, | |
326 | .offset_bits = 9, | |
327 | .size_bits = 23 }, | |
328 | }; | |
329 | ||
cbae32c5 HR |
330 | #define SERVICE_REC_FIELD(field) \ |
331 | .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \ | |
332 | .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \ | |
333 | .field_name = "sa_service_rec:" #field | |
334 | ||
335 | static const struct ib_field service_rec_table[] = { | |
336 | { SERVICE_REC_FIELD(id), | |
337 | .offset_words = 0, | |
338 | .offset_bits = 0, | |
339 | .size_bits = 64 }, | |
340 | { SERVICE_REC_FIELD(gid), | |
341 | .offset_words = 2, | |
342 | .offset_bits = 0, | |
343 | .size_bits = 128 }, | |
344 | { SERVICE_REC_FIELD(pkey), | |
345 | .offset_words = 6, | |
346 | .offset_bits = 0, | |
347 | .size_bits = 16 }, | |
348 | { SERVICE_REC_FIELD(lease), | |
349 | .offset_words = 7, | |
350 | .offset_bits = 0, | |
351 | .size_bits = 32 }, | |
352 | { SERVICE_REC_FIELD(key), | |
353 | .offset_words = 8, | |
354 | .offset_bits = 0, | |
355 | .size_bits = 128 }, | |
356 | { SERVICE_REC_FIELD(name), | |
357 | .offset_words = 12, | |
358 | .offset_bits = 0, | |
359 | .size_bits = 64*8 }, | |
360 | { SERVICE_REC_FIELD(data8), | |
361 | .offset_words = 28, | |
362 | .offset_bits = 0, | |
363 | .size_bits = 16*8 }, | |
364 | { SERVICE_REC_FIELD(data16), | |
365 | .offset_words = 32, | |
366 | .offset_bits = 0, | |
367 | .size_bits = 8*16 }, | |
368 | { SERVICE_REC_FIELD(data32), | |
369 | .offset_words = 36, | |
370 | .offset_bits = 0, | |
371 | .size_bits = 4*32 }, | |
372 | { SERVICE_REC_FIELD(data64), | |
373 | .offset_words = 40, | |
374 | .offset_bits = 0, | |
375 | .size_bits = 2*64 }, | |
376 | }; | |
377 | ||
1da177e4 LT |
378 | static void free_sm_ah(struct kref *kref) |
379 | { | |
380 | struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref); | |
381 | ||
382 | ib_destroy_ah(sm_ah->ah); | |
383 | kfree(sm_ah); | |
384 | } | |
385 | ||
386 | static void update_sm_ah(void *port_ptr) | |
387 | { | |
388 | struct ib_sa_port *port = port_ptr; | |
389 | struct ib_sa_sm_ah *new_ah, *old_ah; | |
390 | struct ib_port_attr port_attr; | |
391 | struct ib_ah_attr ah_attr; | |
392 | ||
393 | if (ib_query_port(port->agent->device, port->port_num, &port_attr)) { | |
394 | printk(KERN_WARNING "Couldn't query port\n"); | |
395 | return; | |
396 | } | |
397 | ||
398 | new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL); | |
399 | if (!new_ah) { | |
400 | printk(KERN_WARNING "Couldn't allocate new SM AH\n"); | |
401 | return; | |
402 | } | |
403 | ||
404 | kref_init(&new_ah->ref); | |
405 | ||
406 | memset(&ah_attr, 0, sizeof ah_attr); | |
407 | ah_attr.dlid = port_attr.sm_lid; | |
408 | ah_attr.sl = port_attr.sm_sl; | |
409 | ah_attr.port_num = port->port_num; | |
410 | ||
411 | new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr); | |
412 | if (IS_ERR(new_ah->ah)) { | |
413 | printk(KERN_WARNING "Couldn't create new SM AH\n"); | |
414 | kfree(new_ah); | |
415 | return; | |
416 | } | |
417 | ||
418 | spin_lock_irq(&port->ah_lock); | |
419 | old_ah = port->sm_ah; | |
420 | port->sm_ah = new_ah; | |
421 | spin_unlock_irq(&port->ah_lock); | |
422 | ||
423 | if (old_ah) | |
424 | kref_put(&old_ah->ref, free_sm_ah); | |
425 | } | |
426 | ||
427 | static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event) | |
428 | { | |
429 | if (event->event == IB_EVENT_PORT_ERR || | |
430 | event->event == IB_EVENT_PORT_ACTIVE || | |
431 | event->event == IB_EVENT_LID_CHANGE || | |
432 | event->event == IB_EVENT_PKEY_CHANGE || | |
433 | event->event == IB_EVENT_SM_CHANGE) { | |
434 | struct ib_sa_device *sa_dev = | |
435 | ib_get_client_data(event->device, &sa_client); | |
436 | ||
437 | schedule_work(&sa_dev->port[event->element.port_num - | |
438 | sa_dev->start_port].update_task); | |
439 | } | |
440 | } | |
441 | ||
442 | /** | |
443 | * ib_sa_cancel_query - try to cancel an SA query | |
444 | * @id:ID of query to cancel | |
445 | * @query:query pointer to cancel | |
446 | * | |
447 | * Try to cancel an SA query. If the id and query don't match up or | |
448 | * the query has already completed, nothing is done. Otherwise the | |
449 | * query is canceled and will complete with a status of -EINTR. | |
450 | */ | |
451 | void ib_sa_cancel_query(int id, struct ib_sa_query *query) | |
452 | { | |
453 | unsigned long flags; | |
454 | struct ib_mad_agent *agent; | |
455 | ||
456 | spin_lock_irqsave(&idr_lock, flags); | |
457 | if (idr_find(&query_idr, id) != query) { | |
458 | spin_unlock_irqrestore(&idr_lock, flags); | |
459 | return; | |
460 | } | |
461 | agent = query->port->agent; | |
462 | spin_unlock_irqrestore(&idr_lock, flags); | |
463 | ||
464 | ib_cancel_mad(agent, id); | |
465 | } | |
466 | EXPORT_SYMBOL(ib_sa_cancel_query); | |
467 | ||
468 | static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent) | |
469 | { | |
470 | unsigned long flags; | |
471 | ||
472 | memset(mad, 0, sizeof *mad); | |
473 | ||
474 | mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION; | |
475 | mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM; | |
476 | mad->mad_hdr.class_version = IB_SA_CLASS_VERSION; | |
477 | ||
478 | spin_lock_irqsave(&tid_lock, flags); | |
479 | mad->mad_hdr.tid = | |
480 | cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++); | |
481 | spin_unlock_irqrestore(&tid_lock, flags); | |
482 | } | |
483 | ||
484 | static int send_mad(struct ib_sa_query *query, int timeout_ms) | |
485 | { | |
486 | struct ib_sa_port *port = query->port; | |
487 | unsigned long flags; | |
488 | int ret; | |
489 | struct ib_sge gather_list; | |
490 | struct ib_send_wr *bad_wr, wr = { | |
491 | .opcode = IB_WR_SEND, | |
492 | .sg_list = &gather_list, | |
493 | .num_sge = 1, | |
494 | .send_flags = IB_SEND_SIGNALED, | |
495 | .wr = { | |
496 | .ud = { | |
497 | .mad_hdr = &query->mad->mad_hdr, | |
498 | .remote_qpn = 1, | |
499 | .remote_qkey = IB_QP1_QKEY, | |
f75b7a52 | 500 | .timeout_ms = timeout_ms, |
1da177e4 LT |
501 | } |
502 | } | |
503 | }; | |
504 | ||
505 | retry: | |
506 | if (!idr_pre_get(&query_idr, GFP_ATOMIC)) | |
507 | return -ENOMEM; | |
508 | spin_lock_irqsave(&idr_lock, flags); | |
509 | ret = idr_get_new(&query_idr, query, &query->id); | |
510 | spin_unlock_irqrestore(&idr_lock, flags); | |
511 | if (ret == -EAGAIN) | |
512 | goto retry; | |
513 | if (ret) | |
514 | return ret; | |
515 | ||
516 | wr.wr_id = query->id; | |
517 | ||
518 | spin_lock_irqsave(&port->ah_lock, flags); | |
519 | kref_get(&port->sm_ah->ref); | |
520 | query->sm_ah = port->sm_ah; | |
521 | wr.wr.ud.ah = port->sm_ah->ah; | |
522 | spin_unlock_irqrestore(&port->ah_lock, flags); | |
523 | ||
524 | gather_list.addr = dma_map_single(port->agent->device->dma_device, | |
525 | query->mad, | |
526 | sizeof (struct ib_sa_mad), | |
527 | DMA_TO_DEVICE); | |
528 | gather_list.length = sizeof (struct ib_sa_mad); | |
b82cab6b | 529 | gather_list.lkey = port->agent->mr->lkey; |
1da177e4 LT |
530 | pci_unmap_addr_set(query, mapping, gather_list.addr); |
531 | ||
532 | ret = ib_post_send_mad(port->agent, &wr, &bad_wr); | |
533 | if (ret) { | |
534 | dma_unmap_single(port->agent->device->dma_device, | |
535 | pci_unmap_addr(query, mapping), | |
536 | sizeof (struct ib_sa_mad), | |
537 | DMA_TO_DEVICE); | |
538 | kref_put(&query->sm_ah->ref, free_sm_ah); | |
539 | spin_lock_irqsave(&idr_lock, flags); | |
540 | idr_remove(&query_idr, query->id); | |
541 | spin_unlock_irqrestore(&idr_lock, flags); | |
542 | } | |
543 | ||
dae4c1d2 RD |
544 | /* |
545 | * It's not safe to dereference query any more, because the | |
546 | * send may already have completed and freed the query in | |
547 | * another context. So use wr.wr_id, which has a copy of the | |
548 | * query's id. | |
549 | */ | |
550 | return ret ? ret : wr.wr_id; | |
1da177e4 LT |
551 | } |
552 | ||
553 | static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query, | |
554 | int status, | |
555 | struct ib_sa_mad *mad) | |
556 | { | |
557 | struct ib_sa_path_query *query = | |
558 | container_of(sa_query, struct ib_sa_path_query, sa_query); | |
559 | ||
560 | if (mad) { | |
561 | struct ib_sa_path_rec rec; | |
562 | ||
563 | ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), | |
564 | mad->data, &rec); | |
565 | query->callback(status, &rec, query->context); | |
566 | } else | |
567 | query->callback(status, NULL, query->context); | |
568 | } | |
569 | ||
570 | static void ib_sa_path_rec_release(struct ib_sa_query *sa_query) | |
571 | { | |
572 | kfree(sa_query->mad); | |
573 | kfree(container_of(sa_query, struct ib_sa_path_query, sa_query)); | |
574 | } | |
575 | ||
576 | /** | |
577 | * ib_sa_path_rec_get - Start a Path get query | |
578 | * @device:device to send query on | |
579 | * @port_num: port number to send query on | |
580 | * @rec:Path Record to send in query | |
581 | * @comp_mask:component mask to send in query | |
582 | * @timeout_ms:time to wait for response | |
583 | * @gfp_mask:GFP mask to use for internal allocations | |
584 | * @callback:function called when query completes, times out or is | |
585 | * canceled | |
586 | * @context:opaque user context passed to callback | |
587 | * @sa_query:query context, used to cancel query | |
588 | * | |
589 | * Send a Path Record Get query to the SA to look up a path. The | |
590 | * callback function will be called when the query completes (or | |
591 | * fails); status is 0 for a successful response, -EINTR if the query | |
592 | * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error | |
593 | * occurred sending the query. The resp parameter of the callback is | |
594 | * only valid if status is 0. | |
595 | * | |
596 | * If the return value of ib_sa_path_rec_get() is negative, it is an | |
597 | * error code. Otherwise it is a query ID that can be used to cancel | |
598 | * the query. | |
599 | */ | |
600 | int ib_sa_path_rec_get(struct ib_device *device, u8 port_num, | |
601 | struct ib_sa_path_rec *rec, | |
602 | ib_sa_comp_mask comp_mask, | |
f13f9f50 | 603 | int timeout_ms, unsigned int __nocast gfp_mask, |
1da177e4 LT |
604 | void (*callback)(int status, |
605 | struct ib_sa_path_rec *resp, | |
606 | void *context), | |
607 | void *context, | |
608 | struct ib_sa_query **sa_query) | |
609 | { | |
610 | struct ib_sa_path_query *query; | |
611 | struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); | |
612 | struct ib_sa_port *port = &sa_dev->port[port_num - sa_dev->start_port]; | |
613 | struct ib_mad_agent *agent = port->agent; | |
614 | int ret; | |
615 | ||
616 | query = kmalloc(sizeof *query, gfp_mask); | |
617 | if (!query) | |
618 | return -ENOMEM; | |
619 | query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask); | |
620 | if (!query->sa_query.mad) { | |
621 | kfree(query); | |
622 | return -ENOMEM; | |
623 | } | |
624 | ||
625 | query->callback = callback; | |
626 | query->context = context; | |
627 | ||
628 | init_mad(query->sa_query.mad, agent); | |
629 | ||
e4f50f00 | 630 | query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL; |
1da177e4 LT |
631 | query->sa_query.release = ib_sa_path_rec_release; |
632 | query->sa_query.port = port; | |
633 | query->sa_query.mad->mad_hdr.method = IB_MGMT_METHOD_GET; | |
634 | query->sa_query.mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC); | |
635 | query->sa_query.mad->sa_hdr.comp_mask = comp_mask; | |
636 | ||
637 | ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), | |
638 | rec, query->sa_query.mad->data); | |
639 | ||
640 | *sa_query = &query->sa_query; | |
dae4c1d2 | 641 | |
1da177e4 | 642 | ret = send_mad(&query->sa_query, timeout_ms); |
dae4c1d2 | 643 | if (ret < 0) { |
1da177e4 LT |
644 | *sa_query = NULL; |
645 | kfree(query->sa_query.mad); | |
646 | kfree(query); | |
647 | } | |
648 | ||
dae4c1d2 | 649 | return ret; |
1da177e4 LT |
650 | } |
651 | EXPORT_SYMBOL(ib_sa_path_rec_get); | |
652 | ||
cbae32c5 HR |
653 | static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query, |
654 | int status, | |
655 | struct ib_sa_mad *mad) | |
656 | { | |
657 | struct ib_sa_service_query *query = | |
658 | container_of(sa_query, struct ib_sa_service_query, sa_query); | |
659 | ||
660 | if (mad) { | |
661 | struct ib_sa_service_rec rec; | |
662 | ||
663 | ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table), | |
664 | mad->data, &rec); | |
665 | query->callback(status, &rec, query->context); | |
666 | } else | |
667 | query->callback(status, NULL, query->context); | |
668 | } | |
669 | ||
670 | static void ib_sa_service_rec_release(struct ib_sa_query *sa_query) | |
671 | { | |
672 | kfree(sa_query->mad); | |
673 | kfree(container_of(sa_query, struct ib_sa_service_query, sa_query)); | |
674 | } | |
675 | ||
676 | /** | |
677 | * ib_sa_service_rec_query - Start Service Record operation | |
678 | * @device:device to send request on | |
679 | * @port_num: port number to send request on | |
680 | * @method:SA method - should be get, set, or delete | |
681 | * @rec:Service Record to send in request | |
682 | * @comp_mask:component mask to send in request | |
683 | * @timeout_ms:time to wait for response | |
684 | * @gfp_mask:GFP mask to use for internal allocations | |
685 | * @callback:function called when request completes, times out or is | |
686 | * canceled | |
687 | * @context:opaque user context passed to callback | |
688 | * @sa_query:request context, used to cancel request | |
689 | * | |
690 | * Send a Service Record set/get/delete to the SA to register, | |
691 | * unregister or query a service record. | |
692 | * The callback function will be called when the request completes (or | |
693 | * fails); status is 0 for a successful response, -EINTR if the query | |
694 | * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error | |
695 | * occurred sending the query. The resp parameter of the callback is | |
696 | * only valid if status is 0. | |
697 | * | |
698 | * If the return value of ib_sa_service_rec_query() is negative, it is an | |
699 | * error code. Otherwise it is a request ID that can be used to cancel | |
700 | * the query. | |
701 | */ | |
702 | int ib_sa_service_rec_query(struct ib_device *device, u8 port_num, u8 method, | |
703 | struct ib_sa_service_rec *rec, | |
704 | ib_sa_comp_mask comp_mask, | |
f13f9f50 | 705 | int timeout_ms, unsigned int __nocast gfp_mask, |
cbae32c5 HR |
706 | void (*callback)(int status, |
707 | struct ib_sa_service_rec *resp, | |
708 | void *context), | |
709 | void *context, | |
710 | struct ib_sa_query **sa_query) | |
711 | { | |
712 | struct ib_sa_service_query *query; | |
713 | struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); | |
714 | struct ib_sa_port *port = &sa_dev->port[port_num - sa_dev->start_port]; | |
715 | struct ib_mad_agent *agent = port->agent; | |
716 | int ret; | |
717 | ||
718 | if (method != IB_MGMT_METHOD_GET && | |
719 | method != IB_MGMT_METHOD_SET && | |
720 | method != IB_SA_METHOD_DELETE) | |
721 | return -EINVAL; | |
722 | ||
723 | query = kmalloc(sizeof *query, gfp_mask); | |
724 | if (!query) | |
725 | return -ENOMEM; | |
726 | query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask); | |
727 | if (!query->sa_query.mad) { | |
728 | kfree(query); | |
729 | return -ENOMEM; | |
730 | } | |
731 | ||
732 | query->callback = callback; | |
733 | query->context = context; | |
734 | ||
735 | init_mad(query->sa_query.mad, agent); | |
736 | ||
737 | query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL; | |
738 | query->sa_query.release = ib_sa_service_rec_release; | |
739 | query->sa_query.port = port; | |
740 | query->sa_query.mad->mad_hdr.method = method; | |
741 | query->sa_query.mad->mad_hdr.attr_id = | |
742 | cpu_to_be16(IB_SA_ATTR_SERVICE_REC); | |
743 | query->sa_query.mad->sa_hdr.comp_mask = comp_mask; | |
744 | ||
745 | ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table), | |
746 | rec, query->sa_query.mad->data); | |
747 | ||
748 | *sa_query = &query->sa_query; | |
749 | ||
750 | ret = send_mad(&query->sa_query, timeout_ms); | |
751 | if (ret < 0) { | |
752 | *sa_query = NULL; | |
753 | kfree(query->sa_query.mad); | |
754 | kfree(query); | |
755 | } | |
756 | ||
757 | return ret; | |
758 | } | |
759 | EXPORT_SYMBOL(ib_sa_service_rec_query); | |
760 | ||
1da177e4 LT |
761 | static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query, |
762 | int status, | |
763 | struct ib_sa_mad *mad) | |
764 | { | |
765 | struct ib_sa_mcmember_query *query = | |
766 | container_of(sa_query, struct ib_sa_mcmember_query, sa_query); | |
767 | ||
768 | if (mad) { | |
769 | struct ib_sa_mcmember_rec rec; | |
770 | ||
771 | ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), | |
772 | mad->data, &rec); | |
773 | query->callback(status, &rec, query->context); | |
774 | } else | |
775 | query->callback(status, NULL, query->context); | |
776 | } | |
777 | ||
778 | static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query) | |
779 | { | |
780 | kfree(sa_query->mad); | |
781 | kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query)); | |
782 | } | |
783 | ||
784 | int ib_sa_mcmember_rec_query(struct ib_device *device, u8 port_num, | |
785 | u8 method, | |
786 | struct ib_sa_mcmember_rec *rec, | |
787 | ib_sa_comp_mask comp_mask, | |
f13f9f50 | 788 | int timeout_ms, unsigned int __nocast gfp_mask, |
1da177e4 LT |
789 | void (*callback)(int status, |
790 | struct ib_sa_mcmember_rec *resp, | |
791 | void *context), | |
792 | void *context, | |
793 | struct ib_sa_query **sa_query) | |
794 | { | |
795 | struct ib_sa_mcmember_query *query; | |
796 | struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); | |
797 | struct ib_sa_port *port = &sa_dev->port[port_num - sa_dev->start_port]; | |
798 | struct ib_mad_agent *agent = port->agent; | |
799 | int ret; | |
800 | ||
801 | query = kmalloc(sizeof *query, gfp_mask); | |
802 | if (!query) | |
803 | return -ENOMEM; | |
804 | query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask); | |
805 | if (!query->sa_query.mad) { | |
806 | kfree(query); | |
807 | return -ENOMEM; | |
808 | } | |
809 | ||
810 | query->callback = callback; | |
811 | query->context = context; | |
812 | ||
813 | init_mad(query->sa_query.mad, agent); | |
814 | ||
e4f50f00 | 815 | query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL; |
1da177e4 LT |
816 | query->sa_query.release = ib_sa_mcmember_rec_release; |
817 | query->sa_query.port = port; | |
818 | query->sa_query.mad->mad_hdr.method = method; | |
819 | query->sa_query.mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC); | |
820 | query->sa_query.mad->sa_hdr.comp_mask = comp_mask; | |
821 | ||
822 | ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), | |
823 | rec, query->sa_query.mad->data); | |
824 | ||
825 | *sa_query = &query->sa_query; | |
dae4c1d2 | 826 | |
1da177e4 | 827 | ret = send_mad(&query->sa_query, timeout_ms); |
dae4c1d2 | 828 | if (ret < 0) { |
1da177e4 LT |
829 | *sa_query = NULL; |
830 | kfree(query->sa_query.mad); | |
831 | kfree(query); | |
832 | } | |
833 | ||
dae4c1d2 | 834 | return ret; |
1da177e4 LT |
835 | } |
836 | EXPORT_SYMBOL(ib_sa_mcmember_rec_query); | |
837 | ||
838 | static void send_handler(struct ib_mad_agent *agent, | |
839 | struct ib_mad_send_wc *mad_send_wc) | |
840 | { | |
841 | struct ib_sa_query *query; | |
842 | unsigned long flags; | |
843 | ||
844 | spin_lock_irqsave(&idr_lock, flags); | |
845 | query = idr_find(&query_idr, mad_send_wc->wr_id); | |
846 | spin_unlock_irqrestore(&idr_lock, flags); | |
847 | ||
848 | if (!query) | |
849 | return; | |
850 | ||
e4f50f00 RD |
851 | if (query->callback) |
852 | switch (mad_send_wc->status) { | |
853 | case IB_WC_SUCCESS: | |
854 | /* No callback -- already got recv */ | |
855 | break; | |
856 | case IB_WC_RESP_TIMEOUT_ERR: | |
857 | query->callback(query, -ETIMEDOUT, NULL); | |
858 | break; | |
859 | case IB_WC_WR_FLUSH_ERR: | |
860 | query->callback(query, -EINTR, NULL); | |
861 | break; | |
862 | default: | |
863 | query->callback(query, -EIO, NULL); | |
864 | break; | |
865 | } | |
1da177e4 LT |
866 | |
867 | dma_unmap_single(agent->device->dma_device, | |
868 | pci_unmap_addr(query, mapping), | |
869 | sizeof (struct ib_sa_mad), | |
870 | DMA_TO_DEVICE); | |
871 | kref_put(&query->sm_ah->ref, free_sm_ah); | |
872 | ||
873 | query->release(query); | |
874 | ||
875 | spin_lock_irqsave(&idr_lock, flags); | |
876 | idr_remove(&query_idr, mad_send_wc->wr_id); | |
877 | spin_unlock_irqrestore(&idr_lock, flags); | |
878 | } | |
879 | ||
880 | static void recv_handler(struct ib_mad_agent *mad_agent, | |
881 | struct ib_mad_recv_wc *mad_recv_wc) | |
882 | { | |
883 | struct ib_sa_query *query; | |
884 | unsigned long flags; | |
885 | ||
886 | spin_lock_irqsave(&idr_lock, flags); | |
887 | query = idr_find(&query_idr, mad_recv_wc->wc->wr_id); | |
888 | spin_unlock_irqrestore(&idr_lock, flags); | |
889 | ||
e4f50f00 | 890 | if (query && query->callback) { |
1da177e4 LT |
891 | if (mad_recv_wc->wc->status == IB_WC_SUCCESS) |
892 | query->callback(query, | |
893 | mad_recv_wc->recv_buf.mad->mad_hdr.status ? | |
894 | -EINVAL : 0, | |
895 | (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad); | |
896 | else | |
897 | query->callback(query, -EIO, NULL); | |
898 | } | |
899 | ||
900 | ib_free_recv_mad(mad_recv_wc); | |
901 | } | |
902 | ||
903 | static void ib_sa_add_one(struct ib_device *device) | |
904 | { | |
905 | struct ib_sa_device *sa_dev; | |
906 | int s, e, i; | |
907 | ||
908 | if (device->node_type == IB_NODE_SWITCH) | |
909 | s = e = 0; | |
910 | else { | |
911 | s = 1; | |
912 | e = device->phys_port_cnt; | |
913 | } | |
914 | ||
915 | sa_dev = kmalloc(sizeof *sa_dev + | |
916 | (e - s + 1) * sizeof (struct ib_sa_port), | |
917 | GFP_KERNEL); | |
918 | if (!sa_dev) | |
919 | return; | |
920 | ||
921 | sa_dev->start_port = s; | |
922 | sa_dev->end_port = e; | |
923 | ||
924 | for (i = 0; i <= e - s; ++i) { | |
1da177e4 LT |
925 | sa_dev->port[i].sm_ah = NULL; |
926 | sa_dev->port[i].port_num = i + s; | |
927 | spin_lock_init(&sa_dev->port[i].ah_lock); | |
928 | ||
929 | sa_dev->port[i].agent = | |
930 | ib_register_mad_agent(device, i + s, IB_QPT_GSI, | |
931 | NULL, 0, send_handler, | |
932 | recv_handler, sa_dev); | |
933 | if (IS_ERR(sa_dev->port[i].agent)) | |
934 | goto err; | |
935 | ||
1da177e4 LT |
936 | INIT_WORK(&sa_dev->port[i].update_task, |
937 | update_sm_ah, &sa_dev->port[i]); | |
938 | } | |
939 | ||
940 | ib_set_client_data(device, &sa_client, sa_dev); | |
941 | ||
942 | /* | |
943 | * We register our event handler after everything is set up, | |
944 | * and then update our cached info after the event handler is | |
945 | * registered to avoid any problems if a port changes state | |
946 | * during our initialization. | |
947 | */ | |
948 | ||
949 | INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event); | |
950 | if (ib_register_event_handler(&sa_dev->event_handler)) | |
951 | goto err; | |
952 | ||
953 | for (i = 0; i <= e - s; ++i) | |
954 | update_sm_ah(&sa_dev->port[i]); | |
955 | ||
956 | return; | |
957 | ||
958 | err: | |
b82cab6b | 959 | while (--i >= 0) |
1da177e4 | 960 | ib_unregister_mad_agent(sa_dev->port[i].agent); |
1da177e4 LT |
961 | |
962 | kfree(sa_dev); | |
963 | ||
964 | return; | |
965 | } | |
966 | ||
967 | static void ib_sa_remove_one(struct ib_device *device) | |
968 | { | |
969 | struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); | |
970 | int i; | |
971 | ||
972 | if (!sa_dev) | |
973 | return; | |
974 | ||
975 | ib_unregister_event_handler(&sa_dev->event_handler); | |
976 | ||
977 | for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) { | |
978 | ib_unregister_mad_agent(sa_dev->port[i].agent); | |
979 | kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah); | |
980 | } | |
981 | ||
982 | kfree(sa_dev); | |
983 | } | |
984 | ||
985 | static int __init ib_sa_init(void) | |
986 | { | |
987 | int ret; | |
988 | ||
989 | spin_lock_init(&idr_lock); | |
990 | spin_lock_init(&tid_lock); | |
991 | ||
992 | get_random_bytes(&tid, sizeof tid); | |
993 | ||
994 | ret = ib_register_client(&sa_client); | |
995 | if (ret) | |
996 | printk(KERN_ERR "Couldn't register ib_sa client\n"); | |
997 | ||
998 | return ret; | |
999 | } | |
1000 | ||
1001 | static void __exit ib_sa_cleanup(void) | |
1002 | { | |
1003 | ib_unregister_client(&sa_client); | |
1004 | } | |
1005 | ||
1006 | module_init(ib_sa_init); | |
1007 | module_exit(ib_sa_cleanup); |