projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge remote-tracking branch 'spi/topic/xilinx' into spi-next
[deliverable/linux.git] / drivers / infiniband / core / sa_query.c
CommitLineData
1da177e4
LT		 1/*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
43506d95 3 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
c1a0b23b 4 * Copyright (c) 2006 Intel Corporation. All rights reserved.
1da177e4
LT		 5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
1da177e4
LT		 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>
1da177e4
LT		 41#include <linux/dma-mapping.h>
42#include <linux/kref.h>
43#include <linux/idr.h>
4e57b681 44#include <linux/workqueue.h>
dd5f03be 45#include <uapi/linux/if_ether.h>
a4d61e84 46#include <rdma/ib_pack.h>
6d969a47 47#include <rdma/ib_cache.h>
2ca546b9
KW		 48#include <rdma/rdma_netlink.h>
49#include <net/netlink.h>
50#include <uapi/rdma/ib_user_sa.h>
51#include <rdma/ib_marshall.h>
20029832 52#include <rdma/ib_addr.h>
faec2f7b 53#include "sa.h"
20029832 54#include "core_priv.h"
1da177e4 55
2ca546b9
KW		 56#define IB_SA_LOCAL_SVC_TIMEOUT_MIN 100
57#define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT 2000
58#define IB_SA_LOCAL_SVC_TIMEOUT_MAX 200000
59static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT;
60
1da177e4
LT		 61struct ib_sa_sm_ah {
62 struct ib_ah *ah;
63 struct kref ref;
2aec5c60 64 u16 pkey_index;
d0e7bb14 65 u8 src_path_mask;
1da177e4
LT		 66};
67
68struct ib_sa_port {
69 struct ib_mad_agent *agent;
1da177e4
LT		 70 struct ib_sa_sm_ah *sm_ah;
71 struct work_struct update_task;
72 spinlock_t ah_lock;
73 u8 port_num;
74};
75
76struct ib_sa_device {
77 int start_port, end_port;
78 struct ib_event_handler event_handler;
79 struct ib_sa_port port[0];
80};
81
82struct ib_sa_query {
83 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
84 void (*release)(struct ib_sa_query *);
c1a0b23b 85 struct ib_sa_client *client;
34816ad9
SH		 86 struct ib_sa_port *port;
87 struct ib_mad_send_buf *mad_buf;
88 struct ib_sa_sm_ah *sm_ah;
89 int id;
2ca546b9
KW		 90 u32 flags;
91 struct list_head list; /* Local svc request list */
92 u32 seq; /* Local svc request sequence number */
93 unsigned long timeout; /* Local svc timeout */
94 u8 path_use; /* How will the pathrecord be used */
1da177e4
LT		 95};
96
2ca546b9
KW		 97#define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001
98#define IB_SA_CANCEL 0x00000002
99
cbae32c5
HR		 100struct ib_sa_service_query {
101 void (*callback)(int, struct ib_sa_service_rec *, void *);
102 void *context;
103 struct ib_sa_query sa_query;
104};
105
1da177e4
LT		 106struct ib_sa_path_query {
107 void (*callback)(int, struct ib_sa_path_rec *, void *);
108 void *context;
109 struct ib_sa_query sa_query;
110};
111
aeab97ed
ES		 112struct ib_sa_guidinfo_query {
113 void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
114 void *context;
115 struct ib_sa_query sa_query;
116};
117
628e6f75
ES		 118struct ib_sa_classport_info_query {
119 void (*callback)(int, struct ib_class_port_info *, void *);
120 void *context;
121 struct ib_sa_query sa_query;
122};
123
1da177e4
LT		 124struct ib_sa_mcmember_query {
125 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
126 void *context;
127 struct ib_sa_query sa_query;
128};
129
2ca546b9
KW		 130static LIST_HEAD(ib_nl_request_list);
131static DEFINE_SPINLOCK(ib_nl_request_lock);
132static atomic_t ib_nl_sa_request_seq;
133static struct workqueue_struct *ib_nl_wq;
134static struct delayed_work ib_nl_timed_work;
135static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = {
136 [LS_NLA_TYPE_PATH_RECORD] = {.type = NLA_BINARY,
137 .len = sizeof(struct ib_path_rec_data)},
138 [LS_NLA_TYPE_TIMEOUT] = {.type = NLA_U32},
139 [LS_NLA_TYPE_SERVICE_ID] = {.type = NLA_U64},
140 [LS_NLA_TYPE_DGID] = {.type = NLA_BINARY,
141 .len = sizeof(struct rdma_nla_ls_gid)},
142 [LS_NLA_TYPE_SGID] = {.type = NLA_BINARY,
143 .len = sizeof(struct rdma_nla_ls_gid)},
144 [LS_NLA_TYPE_TCLASS] = {.type = NLA_U8},
145 [LS_NLA_TYPE_PKEY] = {.type = NLA_U16},
146 [LS_NLA_TYPE_QOS_CLASS] = {.type = NLA_U16},
147};
148
149
1da177e4 150static void ib_sa_add_one(struct ib_device *device);
7c1eb45a 151static void ib_sa_remove_one(struct ib_device *device, void *client_data);
1da177e4
LT		 152
153static struct ib_client sa_client = {
154 .name = "sa",
155 .add = ib_sa_add_one,
156 .remove = ib_sa_remove_one
157};
158
6276e08a 159static DEFINE_SPINLOCK(idr_lock);
1da177e4
LT		 160static DEFINE_IDR(query_idr);
161
6276e08a 162static DEFINE_SPINLOCK(tid_lock);
1da177e4
LT		 163static u32 tid;
164
1da177e4
LT		 165#define PATH_REC_FIELD(field) \
166 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
167 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
168 .field_name = "sa_path_rec:" #field
169
170static const struct ib_field path_rec_table[] = {
733d65fe 171 { PATH_REC_FIELD(service_id),
1da177e4
LT		 172 .offset_words = 0,
173 .offset_bits = 0,
733d65fe 174 .size_bits = 64 },
1da177e4
LT		 175 { PATH_REC_FIELD(dgid),
176 .offset_words = 2,
177 .offset_bits = 0,
178 .size_bits = 128 },
179 { PATH_REC_FIELD(sgid),
180 .offset_words = 6,
181 .offset_bits = 0,
182 .size_bits = 128 },
183 { PATH_REC_FIELD(dlid),
184 .offset_words = 10,
185 .offset_bits = 0,
186 .size_bits = 16 },
187 { PATH_REC_FIELD(slid),
188 .offset_words = 10,
189 .offset_bits = 16,
190 .size_bits = 16 },
191 { PATH_REC_FIELD(raw_traffic),
192 .offset_words = 11,
193 .offset_bits = 0,
194 .size_bits = 1 },
195 { RESERVED,
196 .offset_words = 11,
197 .offset_bits = 1,
198 .size_bits = 3 },
199 { PATH_REC_FIELD(flow_label),
200 .offset_words = 11,
201 .offset_bits = 4,
202 .size_bits = 20 },
203 { PATH_REC_FIELD(hop_limit),
204 .offset_words = 11,
205 .offset_bits = 24,
206 .size_bits = 8 },
207 { PATH_REC_FIELD(traffic_class),
208 .offset_words = 12,
209 .offset_bits = 0,
210 .size_bits = 8 },
211 { PATH_REC_FIELD(reversible),
212 .offset_words = 12,
213 .offset_bits = 8,
214 .size_bits = 1 },
215 { PATH_REC_FIELD(numb_path),
216 .offset_words = 12,
217 .offset_bits = 9,
218 .size_bits = 7 },
219 { PATH_REC_FIELD(pkey),
220 .offset_words = 12,
221 .offset_bits = 16,
222 .size_bits = 16 },
733d65fe 223 { PATH_REC_FIELD(qos_class),
1da177e4
LT		 224 .offset_words = 13,
225 .offset_bits = 0,
226 .size_bits = 12 },
227 { PATH_REC_FIELD(sl),
228 .offset_words = 13,
229 .offset_bits = 12,
230 .size_bits = 4 },
231 { PATH_REC_FIELD(mtu_selector),
232 .offset_words = 13,
233 .offset_bits = 16,
234 .size_bits = 2 },
235 { PATH_REC_FIELD(mtu),
236 .offset_words = 13,
237 .offset_bits = 18,
238 .size_bits = 6 },
239 { PATH_REC_FIELD(rate_selector),
240 .offset_words = 13,
241 .offset_bits = 24,
242 .size_bits = 2 },
243 { PATH_REC_FIELD(rate),
244 .offset_words = 13,
245 .offset_bits = 26,
246 .size_bits = 6 },
247 { PATH_REC_FIELD(packet_life_time_selector),
248 .offset_words = 14,
249 .offset_bits = 0,
250 .size_bits = 2 },
251 { PATH_REC_FIELD(packet_life_time),
252 .offset_words = 14,
253 .offset_bits = 2,
254 .size_bits = 6 },
255 { PATH_REC_FIELD(preference),
256 .offset_words = 14,
257 .offset_bits = 8,
258 .size_bits = 8 },
259 { RESERVED,
260 .offset_words = 14,
261 .offset_bits = 16,
262 .size_bits = 48 },
263};
264
265#define MCMEMBER_REC_FIELD(field) \
266 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
267 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
268 .field_name = "sa_mcmember_rec:" #field
269
270static const struct ib_field mcmember_rec_table[] = {
271 { MCMEMBER_REC_FIELD(mgid),
272 .offset_words = 0,
273 .offset_bits = 0,
274 .size_bits = 128 },
275 { MCMEMBER_REC_FIELD(port_gid),
276 .offset_words = 4,
277 .offset_bits = 0,
278 .size_bits = 128 },
279 { MCMEMBER_REC_FIELD(qkey),
280 .offset_words = 8,
281 .offset_bits = 0,
282 .size_bits = 32 },
283 { MCMEMBER_REC_FIELD(mlid),
284 .offset_words = 9,
285 .offset_bits = 0,
286 .size_bits = 16 },
287 { MCMEMBER_REC_FIELD(mtu_selector),
288 .offset_words = 9,
289 .offset_bits = 16,
290 .size_bits = 2 },
291 { MCMEMBER_REC_FIELD(mtu),
292 .offset_words = 9,
293 .offset_bits = 18,
294 .size_bits = 6 },
295 { MCMEMBER_REC_FIELD(traffic_class),
296 .offset_words = 9,
297 .offset_bits = 24,
298 .size_bits = 8 },
299 { MCMEMBER_REC_FIELD(pkey),
300 .offset_words = 10,
301 .offset_bits = 0,
302 .size_bits = 16 },
303 { MCMEMBER_REC_FIELD(rate_selector),
304 .offset_words = 10,
305 .offset_bits = 16,
306 .size_bits = 2 },
307 { MCMEMBER_REC_FIELD(rate),
308 .offset_words = 10,
309 .offset_bits = 18,
310 .size_bits = 6 },
311 { MCMEMBER_REC_FIELD(packet_life_time_selector),
312 .offset_words = 10,
313 .offset_bits = 24,
314 .size_bits = 2 },
315 { MCMEMBER_REC_FIELD(packet_life_time),
316 .offset_words = 10,
317 .offset_bits = 26,
318 .size_bits = 6 },
319 { MCMEMBER_REC_FIELD(sl),
320 .offset_words = 11,
321 .offset_bits = 0,
322 .size_bits = 4 },
323 { MCMEMBER_REC_FIELD(flow_label),
324 .offset_words = 11,
325 .offset_bits = 4,
326 .size_bits = 20 },
327 { MCMEMBER_REC_FIELD(hop_limit),
328 .offset_words = 11,
329 .offset_bits = 24,
330 .size_bits = 8 },
331 { MCMEMBER_REC_FIELD(scope),
332 .offset_words = 12,
333 .offset_bits = 0,
334 .size_bits = 4 },
335 { MCMEMBER_REC_FIELD(join_state),
336 .offset_words = 12,
337 .offset_bits = 4,
338 .size_bits = 4 },
339 { MCMEMBER_REC_FIELD(proxy_join),
340 .offset_words = 12,
341 .offset_bits = 8,
342 .size_bits = 1 },
343 { RESERVED,
344 .offset_words = 12,
345 .offset_bits = 9,
346 .size_bits = 23 },
347};
348
cbae32c5
HR		 349#define SERVICE_REC_FIELD(field) \
350 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
351 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
352 .field_name = "sa_service_rec:" #field
353
354static const struct ib_field service_rec_table[] = {
355 { SERVICE_REC_FIELD(id),
356 .offset_words = 0,
357 .offset_bits = 0,
358 .size_bits = 64 },
359 { SERVICE_REC_FIELD(gid),
360 .offset_words = 2,
361 .offset_bits = 0,
362 .size_bits = 128 },
363 { SERVICE_REC_FIELD(pkey),
364 .offset_words = 6,
365 .offset_bits = 0,
366 .size_bits = 16 },
367 { SERVICE_REC_FIELD(lease),
368 .offset_words = 7,
369 .offset_bits = 0,
370 .size_bits = 32 },
371 { SERVICE_REC_FIELD(key),
372 .offset_words = 8,
373 .offset_bits = 0,
374 .size_bits = 128 },
375 { SERVICE_REC_FIELD(name),
376 .offset_words = 12,
377 .offset_bits = 0,
378 .size_bits = 64*8 },
379 { SERVICE_REC_FIELD(data8),
380 .offset_words = 28,
381 .offset_bits = 0,
382 .size_bits = 16*8 },
383 { SERVICE_REC_FIELD(data16),
384 .offset_words = 32,
385 .offset_bits = 0,
386 .size_bits = 8*16 },
387 { SERVICE_REC_FIELD(data32),
388 .offset_words = 36,
389 .offset_bits = 0,
390 .size_bits = 4*32 },
391 { SERVICE_REC_FIELD(data64),
392 .offset_words = 40,
393 .offset_bits = 0,
394 .size_bits = 2*64 },
395};
396
628e6f75
ES		 397#define CLASSPORTINFO_REC_FIELD(field) \
398 .struct_offset_bytes = offsetof(struct ib_class_port_info, field), \
399 .struct_size_bytes = sizeof((struct ib_class_port_info *)0)->field, \
400 .field_name = "ib_class_port_info:" #field
401
402static const struct ib_field classport_info_rec_table[] = {
403 { CLASSPORTINFO_REC_FIELD(base_version),
404 .offset_words = 0,
405 .offset_bits = 0,
406 .size_bits = 8 },
407 { CLASSPORTINFO_REC_FIELD(class_version),
408 .offset_words = 0,
409 .offset_bits = 8,
410 .size_bits = 8 },
411 { CLASSPORTINFO_REC_FIELD(capability_mask),
412 .offset_words = 0,
413 .offset_bits = 16,
414 .size_bits = 16 },
415 { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
416 .offset_words = 1,
417 .offset_bits = 0,
418 .size_bits = 32 },
419 { CLASSPORTINFO_REC_FIELD(redirect_gid),
420 .offset_words = 2,
421 .offset_bits = 0,
422 .size_bits = 128 },
423 { CLASSPORTINFO_REC_FIELD(redirect_tcslfl),
424 .offset_words = 6,
425 .offset_bits = 0,
426 .size_bits = 32 },
427 { CLASSPORTINFO_REC_FIELD(redirect_lid),
428 .offset_words = 7,
429 .offset_bits = 0,
430 .size_bits = 16 },
431 { CLASSPORTINFO_REC_FIELD(redirect_pkey),
432 .offset_words = 7,
433 .offset_bits = 16,
434 .size_bits = 16 },
435
436 { CLASSPORTINFO_REC_FIELD(redirect_qp),
437 .offset_words = 8,
438 .offset_bits = 0,
439 .size_bits = 32 },
440 { CLASSPORTINFO_REC_FIELD(redirect_qkey),
441 .offset_words = 9,
442 .offset_bits = 0,
443 .size_bits = 32 },
444
445 { CLASSPORTINFO_REC_FIELD(trap_gid),
446 .offset_words = 10,
447 .offset_bits = 0,
448 .size_bits = 128 },
449 { CLASSPORTINFO_REC_FIELD(trap_tcslfl),
450 .offset_words = 14,
451 .offset_bits = 0,
452 .size_bits = 32 },
453
454 { CLASSPORTINFO_REC_FIELD(trap_lid),
455 .offset_words = 15,
456 .offset_bits = 0,
457 .size_bits = 16 },
458 { CLASSPORTINFO_REC_FIELD(trap_pkey),
459 .offset_words = 15,
460 .offset_bits = 16,
461 .size_bits = 16 },
462
463 { CLASSPORTINFO_REC_FIELD(trap_hlqp),
464 .offset_words = 16,
465 .offset_bits = 0,
466 .size_bits = 32 },
467 { CLASSPORTINFO_REC_FIELD(trap_qkey),
468 .offset_words = 17,
469 .offset_bits = 0,
470 .size_bits = 32 },
471};
472
aeab97ed
ES		 473#define GUIDINFO_REC_FIELD(field) \
474 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \
475 .struct_size_bytes = sizeof((struct ib_sa_guidinfo_rec *) 0)->field, \
476 .field_name = "sa_guidinfo_rec:" #field
477
478static const struct ib_field guidinfo_rec_table[] = {
479 { GUIDINFO_REC_FIELD(lid),
480 .offset_words = 0,
481 .offset_bits = 0,
482 .size_bits = 16 },
483 { GUIDINFO_REC_FIELD(block_num),
484 .offset_words = 0,
485 .offset_bits = 16,
486 .size_bits = 8 },
487 { GUIDINFO_REC_FIELD(res1),
488 .offset_words = 0,
489 .offset_bits = 24,
490 .size_bits = 8 },
491 { GUIDINFO_REC_FIELD(res2),
492 .offset_words = 1,
493 .offset_bits = 0,
494 .size_bits = 32 },
495 { GUIDINFO_REC_FIELD(guid_info_list),
496 .offset_words = 2,
497 .offset_bits = 0,
498 .size_bits = 512 },
499};
500
2ca546b9
KW		 501static inline void ib_sa_disable_local_svc(struct ib_sa_query *query)
502{
503 query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE;
504}
505
506static inline int ib_sa_query_cancelled(struct ib_sa_query *query)
507{
508 return (query->flags & IB_SA_CANCEL);
509}
510
511static void ib_nl_set_path_rec_attrs(struct sk_buff *skb,
512 struct ib_sa_query *query)
513{
514 struct ib_sa_path_rec *sa_rec = query->mad_buf->context[1];
515 struct ib_sa_mad *mad = query->mad_buf->mad;
516 ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask;
517 u16 val16;
518 u64 val64;
519 struct rdma_ls_resolve_header *header;
520
521 query->mad_buf->context[1] = NULL;
522
523 /* Construct the family header first */
524 header = (struct rdma_ls_resolve_header *)
525 skb_put(skb, NLMSG_ALIGN(sizeof(*header)));
526 memcpy(header->device_name, query->port->agent->device->name,
527 LS_DEVICE_NAME_MAX);
528 header->port_num = query->port->port_num;
529
530 if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) &&
531 sa_rec->reversible != 0)
532 query->path_use = LS_RESOLVE_PATH_USE_GMP;
533 else
534 query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL;
535 header->path_use = query->path_use;
536
537 /* Now build the attributes */
538 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) {
539 val64 = be64_to_cpu(sa_rec->service_id);
540 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID,
541 sizeof(val64), &val64);
542 }
543 if (comp_mask & IB_SA_PATH_REC_DGID)
544 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID,
545 sizeof(sa_rec->dgid), &sa_rec->dgid);
546 if (comp_mask & IB_SA_PATH_REC_SGID)
547 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID,
548 sizeof(sa_rec->sgid), &sa_rec->sgid);
549 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
550 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS,
551 sizeof(sa_rec->traffic_class), &sa_rec->traffic_class);
552
553 if (comp_mask & IB_SA_PATH_REC_PKEY) {
554 val16 = be16_to_cpu(sa_rec->pkey);
555 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY,
556 sizeof(val16), &val16);
557 }
558 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) {
559 val16 = be16_to_cpu(sa_rec->qos_class);
560 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS,
561 sizeof(val16), &val16);
562 }
563}
564
565static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask)
566{
567 int len = 0;
568
569 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID)
570 len += nla_total_size(sizeof(u64));
571 if (comp_mask & IB_SA_PATH_REC_DGID)
572 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
573 if (comp_mask & IB_SA_PATH_REC_SGID)
574 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
575 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
576 len += nla_total_size(sizeof(u8));
577 if (comp_mask & IB_SA_PATH_REC_PKEY)
578 len += nla_total_size(sizeof(u16));
579 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS)
580 len += nla_total_size(sizeof(u16));
581
582 /*
583 * Make sure that at least some of the required comp_mask bits are
584 * set.
585 */
586 if (WARN_ON(len == 0))
587 return len;
588
589 /* Add the family header */
590 len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header));
591
592 return len;
593}
594
3ebd2fd0 595static int ib_nl_send_msg(struct ib_sa_query *query, gfp_t gfp_mask)
2ca546b9
KW		 596{
597 struct sk_buff *skb = NULL;
598 struct nlmsghdr *nlh;
599 void *data;
600 int ret = 0;
601 struct ib_sa_mad *mad;
602 int len;
603
604 mad = query->mad_buf->mad;
605 len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask);
606 if (len <= 0)
607 return -EMSGSIZE;
608
3ebd2fd0 609 skb = nlmsg_new(len, gfp_mask);
2ca546b9
KW		 610 if (!skb)
611 return -ENOMEM;
612
613 /* Put nlmsg header only for now */
614 data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS,
ba13b5f8 615 RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST);
2ca546b9 616 if (!data) {
0f377d86 617 nlmsg_free(skb);
2ca546b9
KW		 618 return -EMSGSIZE;
619 }
620
621 /* Add attributes */
622 ib_nl_set_path_rec_attrs(skb, query);
623
624 /* Repair the nlmsg header length */
625 nlmsg_end(skb, nlh);
626
3ebd2fd0 627 ret = ibnl_multicast(skb, nlh, RDMA_NL_GROUP_LS, gfp_mask);
2ca546b9
KW		 628 if (!ret)
629 ret = len;
630 else
631 ret = 0;
632
633 return ret;
634}
635
3ebd2fd0 636static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
2ca546b9
KW		 637{
638 unsigned long flags;
639 unsigned long delay;
640 int ret;
641
642 INIT_LIST_HEAD(&query->list);
643 query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq);
644
3ebd2fd0 645 /* Put the request on the list first.*/
2ca546b9 646 spin_lock_irqsave(&ib_nl_request_lock, flags);
2ca546b9
KW		 647 delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
648 query->timeout = delay + jiffies;
649 list_add_tail(&query->list, &ib_nl_request_list);
650 /* Start the timeout if this is the only request */
651 if (ib_nl_request_list.next == &query->list)
652 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
2ca546b9
KW		 653 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
654
3ebd2fd0
KW		 655 ret = ib_nl_send_msg(query, gfp_mask);
656 if (ret <= 0) {
657 ret = -EIO;
658 /* Remove the request */
659 spin_lock_irqsave(&ib_nl_request_lock, flags);
660 list_del(&query->list);
661 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
662 } else {
663 ret = 0;
664 }
665
2ca546b9
KW		 666 return ret;
667}
668
669static int ib_nl_cancel_request(struct ib_sa_query *query)
670{
671 unsigned long flags;
672 struct ib_sa_query *wait_query;
673 int found = 0;
674
675 spin_lock_irqsave(&ib_nl_request_lock, flags);
676 list_for_each_entry(wait_query, &ib_nl_request_list, list) {
677 /* Let the timeout to take care of the callback */
678 if (query == wait_query) {
679 query->flags |= IB_SA_CANCEL;
680 query->timeout = jiffies;
681 list_move(&query->list, &ib_nl_request_list);
682 found = 1;
683 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1);
684 break;
685 }
686 }
687 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
688
689 return found;
690}
691
692static void send_handler(struct ib_mad_agent *agent,
693 struct ib_mad_send_wc *mad_send_wc);
694
695static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
696 const struct nlmsghdr *nlh)
697{
698 struct ib_mad_send_wc mad_send_wc;
699 struct ib_sa_mad *mad = NULL;
700 const struct nlattr *head, *curr;
701 struct ib_path_rec_data *rec;
702 int len, rem;
703 u32 mask = 0;
704 int status = -EIO;
705
706 if (query->callback) {
707 head = (const struct nlattr *) nlmsg_data(nlh);
708 len = nlmsg_len(nlh);
709 switch (query->path_use) {
710 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL:
711 mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND;
712 break;
713
714 case LS_RESOLVE_PATH_USE_ALL:
715 case LS_RESOLVE_PATH_USE_GMP:
716 default:
717 mask = IB_PATH_PRIMARY | IB_PATH_GMP |
718 IB_PATH_BIDIRECTIONAL;
719 break;
720 }
721 nla_for_each_attr(curr, head, len, rem) {
722 if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
723 rec = nla_data(curr);
724 /*
725 * Get the first one. In the future, we may
726 * need to get up to 6 pathrecords.
727 */
728 if ((rec->flags & mask) == mask) {
729 mad = query->mad_buf->mad;
730 mad->mad_hdr.method |=
731 IB_MGMT_METHOD_RESP;
732 memcpy(mad->data, rec->path_rec,
733 sizeof(rec->path_rec));
734 status = 0;
735 break;
736 }
737 }
738 }
739 query->callback(query, status, mad);
740 }
741
742 mad_send_wc.send_buf = query->mad_buf;
743 mad_send_wc.status = IB_WC_SUCCESS;
744 send_handler(query->mad_buf->mad_agent, &mad_send_wc);
745}
746
747static void ib_nl_request_timeout(struct work_struct *work)
748{
749 unsigned long flags;
750 struct ib_sa_query *query;
751 unsigned long delay;
752 struct ib_mad_send_wc mad_send_wc;
753 int ret;
754
755 spin_lock_irqsave(&ib_nl_request_lock, flags);
756 while (!list_empty(&ib_nl_request_list)) {
757 query = list_entry(ib_nl_request_list.next,
758 struct ib_sa_query, list);
759
760 if (time_after(query->timeout, jiffies)) {
761 delay = query->timeout - jiffies;
762 if ((long)delay <= 0)
763 delay = 1;
764 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
765 break;
766 }
767
768 list_del(&query->list);
769 ib_sa_disable_local_svc(query);
770 /* Hold the lock to protect against query cancellation */
771 if (ib_sa_query_cancelled(query))
772 ret = -1;
773 else
774 ret = ib_post_send_mad(query->mad_buf, NULL);
775 if (ret) {
776 mad_send_wc.send_buf = query->mad_buf;
777 mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
778 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
779 send_handler(query->port->agent, &mad_send_wc);
780 spin_lock_irqsave(&ib_nl_request_lock, flags);
781 }
782 }
783 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
784}
785
735c631a
MB		 786int ib_nl_handle_set_timeout(struct sk_buff *skb,
787 struct netlink_callback *cb)
2ca546b9
KW		 788{
789 const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh;
790 int timeout, delta, abs_delta;
791 const struct nlattr *attr;
792 unsigned long flags;
793 struct ib_sa_query *query;
794 long delay = 0;
795 struct nlattr *tb[LS_NLA_TYPE_MAX];
796 int ret;
797
2deeb477
KW		 798 if (!(nlh->nlmsg_flags & NLM_F_REQUEST) ||
799 !(NETLINK_CB(skb).sk) ||
800 !netlink_capable(skb, CAP_NET_ADMIN))
2ca546b9
KW		 801 return -EPERM;
802
803 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
804 nlmsg_len(nlh), ib_nl_policy);
805 attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT];
806 if (ret || !attr)
807 goto settimeout_out;
808
809 timeout = *(int *) nla_data(attr);
810 if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN)
811 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN;
812 if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX)
813 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX;
814
815 delta = timeout - sa_local_svc_timeout_ms;
816 if (delta < 0)
817 abs_delta = -delta;
818 else
819 abs_delta = delta;
820
821 if (delta != 0) {
822 spin_lock_irqsave(&ib_nl_request_lock, flags);
823 sa_local_svc_timeout_ms = timeout;
824 list_for_each_entry(query, &ib_nl_request_list, list) {
825 if (delta < 0 && abs_delta > query->timeout)
826 query->timeout = 0;
827 else
828 query->timeout += delta;
829
830 /* Get the new delay from the first entry */
831 if (!delay) {
832 delay = query->timeout - jiffies;
833 if (delay <= 0)
834 delay = 1;
835 }
836 }
837 if (delay)
838 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work,
839 (unsigned long)delay);
840 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
841 }
842
843settimeout_out:
844 return skb->len;
845}
846
847static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh)
848{
849 struct nlattr *tb[LS_NLA_TYPE_MAX];
850 int ret;
851
852 if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR)
853 return 0;
854
855 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
856 nlmsg_len(nlh), ib_nl_policy);
857 if (ret)
858 return 0;
859
860 return 1;
861}
862
735c631a
MB		 863int ib_nl_handle_resolve_resp(struct sk_buff *skb,
864 struct netlink_callback *cb)
2ca546b9
KW		 865{
866 const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh;
867 unsigned long flags;
868 struct ib_sa_query *query;
869 struct ib_mad_send_buf *send_buf;
870 struct ib_mad_send_wc mad_send_wc;
871 int found = 0;
872 int ret;
873
2deeb477
KW		 874 if ((nlh->nlmsg_flags & NLM_F_REQUEST) ||
875 !(NETLINK_CB(skb).sk) ||
876 !netlink_capable(skb, CAP_NET_ADMIN))
2ca546b9
KW		 877 return -EPERM;
878
879 spin_lock_irqsave(&ib_nl_request_lock, flags);
880 list_for_each_entry(query, &ib_nl_request_list, list) {
881 /*
882 * If the query is cancelled, let the timeout routine
883 * take care of it.
884 */
885 if (nlh->nlmsg_seq == query->seq) {
886 found = !ib_sa_query_cancelled(query);
887 if (found)
888 list_del(&query->list);
889 break;
890 }
891 }
892
893 if (!found) {
894 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
895 goto resp_out;
896 }
897
898 send_buf = query->mad_buf;
899
900 if (!ib_nl_is_good_resolve_resp(nlh)) {
901 /* if the result is a failure, send out the packet via IB */
902 ib_sa_disable_local_svc(query);
903 ret = ib_post_send_mad(query->mad_buf, NULL);
904 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
905 if (ret) {
906 mad_send_wc.send_buf = send_buf;
907 mad_send_wc.status = IB_WC_GENERAL_ERR;
908 send_handler(query->port->agent, &mad_send_wc);
909 }
910 } else {
911 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
912 ib_nl_process_good_resolve_rsp(query, nlh);
913 }
914
915resp_out:
916 return skb->len;
917}
918
1da177e4
LT		 919static void free_sm_ah(struct kref *kref)
920{
921 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
922
923 ib_destroy_ah(sm_ah->ah);
924 kfree(sm_ah);
925}
926
c4028958 927static void update_sm_ah(struct work_struct *work)
1da177e4 928{
c4028958
DH		 929 struct ib_sa_port *port =
930 container_of(work, struct ib_sa_port, update_task);
164ba089 931 struct ib_sa_sm_ah *new_ah;
1da177e4
LT		 932 struct ib_port_attr port_attr;
933 struct ib_ah_attr ah_attr;
934
935 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
aba25a3e 936 pr_warn("Couldn't query port\n");
1da177e4
LT		 937 return;
938 }
939
940 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
941 if (!new_ah) {
1da177e4
LT		 942 return;
943 }
944
945 kref_init(&new_ah->ref);
d0e7bb14 946 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
1da177e4 947
2aec5c60
SH		 948 new_ah->pkey_index = 0;
949 if (ib_find_pkey(port->agent->device, port->port_num,
53998910 950 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
aba25a3e 951 pr_err("Couldn't find index for default PKey\n");
2aec5c60 952
1da177e4
LT		 953 memset(&ah_attr, 0, sizeof ah_attr);
954 ah_attr.dlid = port_attr.sm_lid;
955 ah_attr.sl = port_attr.sm_sl;
956 ah_attr.port_num = port->port_num;
a0c1b2a3
EC		 957 if (port_attr.grh_required) {
958 ah_attr.ah_flags = IB_AH_GRH;
959 ah_attr.grh.dgid.global.subnet_prefix = cpu_to_be64(port_attr.subnet_prefix);
960 ah_attr.grh.dgid.global.interface_id = cpu_to_be64(IB_SA_WELL_KNOWN_GUID);
961 }
1da177e4
LT		 962
963 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
964 if (IS_ERR(new_ah->ah)) {
aba25a3e 965 pr_warn("Couldn't create new SM AH\n");
1da177e4
LT		 966 kfree(new_ah);
967 return;
968 }
969
970 spin_lock_irq(&port->ah_lock);
6b708b3d
JM		 971 if (port->sm_ah)
972 kref_put(&port->sm_ah->ref, free_sm_ah);
1da177e4
LT		 973 port->sm_ah = new_ah;
974 spin_unlock_irq(&port->ah_lock);
975
1da177e4
LT		 976}
977
978static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
979{
980 if (event->event == IB_EVENT_PORT_ERR ||
981 event->event == IB_EVENT_PORT_ACTIVE ||
982 event->event == IB_EVENT_LID_CHANGE ||
983 event->event == IB_EVENT_PKEY_CHANGE ||
acaea9ee
JM		 984 event->event == IB_EVENT_SM_CHANGE ||
985 event->event == IB_EVENT_CLIENT_REREGISTER) {
164ba089
MS		 986 unsigned long flags;
987 struct ib_sa_device *sa_dev =
988 container_of(handler, typeof(*sa_dev), event_handler);
989 struct ib_sa_port *port =
990 &sa_dev->port[event->element.port_num - sa_dev->start_port];
991
9247a8eb 992 if (!rdma_cap_ib_sa(handler->device, port->port_num))
fac70d51
EC		 993 return;
994
164ba089
MS		 995 spin_lock_irqsave(&port->ah_lock, flags);
996 if (port->sm_ah)
997 kref_put(&port->sm_ah->ref, free_sm_ah);
998 port->sm_ah = NULL;
999 spin_unlock_irqrestore(&port->ah_lock, flags);
1da177e4 1000
f0626710 1001 queue_work(ib_wq, &sa_dev->port[event->element.port_num -
1da177e4
LT		 1002 sa_dev->start_port].update_task);
1003 }
1004}
1005
c1a0b23b
MT		 1006void ib_sa_register_client(struct ib_sa_client *client)
1007{
1008 atomic_set(&client->users, 1);
1009 init_completion(&client->comp);
1010}
1011EXPORT_SYMBOL(ib_sa_register_client);
1012
c1a0b23b
MT		 1013void ib_sa_unregister_client(struct ib_sa_client *client)
1014{
1015 ib_sa_client_put(client);
1016 wait_for_completion(&client->comp);
1017}
1018EXPORT_SYMBOL(ib_sa_unregister_client);
1019
1da177e4
LT		 1020/**
1021 * ib_sa_cancel_query - try to cancel an SA query
1022 * @id:ID of query to cancel
1023 * @query:query pointer to cancel
1024 *
1025 * Try to cancel an SA query. If the id and query don't match up or
1026 * the query has already completed, nothing is done. Otherwise the
1027 * query is canceled and will complete with a status of -EINTR.
1028 */
1029void ib_sa_cancel_query(int id, struct ib_sa_query *query)
1030{
1031 unsigned long flags;
1032 struct ib_mad_agent *agent;
34816ad9 1033 struct ib_mad_send_buf *mad_buf;
1da177e4
LT		 1034
1035 spin_lock_irqsave(&idr_lock, flags);
1036 if (idr_find(&query_idr, id) != query) {
1037 spin_unlock_irqrestore(&idr_lock, flags);
1038 return;
1039 }
1040 agent = query->port->agent;
34816ad9 1041 mad_buf = query->mad_buf;
1da177e4
LT		 1042 spin_unlock_irqrestore(&idr_lock, flags);
1043
2ca546b9
KW		 1044 /*
1045 * If the query is still on the netlink request list, schedule
1046 * it to be cancelled by the timeout routine. Otherwise, it has been
1047 * sent to the MAD layer and has to be cancelled from there.
1048 */
1049 if (!ib_nl_cancel_request(query))
1050 ib_cancel_mad(agent, mad_buf);
1da177e4
LT		 1051}
1052EXPORT_SYMBOL(ib_sa_cancel_query);
1053
d0e7bb14
SH		 1054static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
1055{
1056 struct ib_sa_device *sa_dev;
1057 struct ib_sa_port *port;
1058 unsigned long flags;
1059 u8 src_path_mask;
1060
1061 sa_dev = ib_get_client_data(device, &sa_client);
1062 if (!sa_dev)
1063 return 0x7f;
1064
1065 port = &sa_dev->port[port_num - sa_dev->start_port];
1066 spin_lock_irqsave(&port->ah_lock, flags);
1067 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
1068 spin_unlock_irqrestore(&port->ah_lock, flags);
1069
1070 return src_path_mask;
1071}
1072
6d969a47
SH		 1073int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
1074 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)
1075{
1076 int ret;
1077 u16 gid_index;
20029832
MB		 1078 int use_roce;
1079 struct net_device *ndev = NULL;
6d969a47
SH		 1080
1081 memset(ah_attr, 0, sizeof *ah_attr);
1082 ah_attr->dlid = be16_to_cpu(rec->dlid);
1083 ah_attr->sl = rec->sl;
d0e7bb14
SH		 1084 ah_attr->src_path_bits = be16_to_cpu(rec->slid) &
1085 get_src_path_mask(device, port_num);
6d969a47 1086 ah_attr->port_num = port_num;
7084f842 1087 ah_attr->static_rate = rec->rate;
6d969a47 1088
20029832
MB		 1089 use_roce = rdma_cap_eth_ah(device, port_num);
1090
1091 if (use_roce) {
1092 struct net_device *idev;
1093 struct net_device *resolved_dev;
1094 struct rdma_dev_addr dev_addr = {.bound_dev_if = rec->ifindex,
1095 .net = rec->net ? rec->net :
1096 &init_net};
1097 union {
1098 struct sockaddr _sockaddr;
1099 struct sockaddr_in _sockaddr_in;
1100 struct sockaddr_in6 _sockaddr_in6;
1101 } sgid_addr, dgid_addr;
1102
1103 if (!device->get_netdev)
1104 return -EOPNOTSUPP;
1105
1106 rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid);
1107 rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid);
1108
1109 /* validate the route */
1110 ret = rdma_resolve_ip_route(&sgid_addr._sockaddr,
1111 &dgid_addr._sockaddr, &dev_addr);
1112 if (ret)
1113 return ret;
3c86aa70 1114
20029832
MB		 1115 if ((dev_addr.network == RDMA_NETWORK_IPV4 ||
1116 dev_addr.network == RDMA_NETWORK_IPV6) &&
1117 rec->gid_type != IB_GID_TYPE_ROCE_UDP_ENCAP)
1118 return -EINVAL;
1119
1120 idev = device->get_netdev(device, port_num);
1121 if (!idev)
1122 return -ENODEV;
1123
1124 resolved_dev = dev_get_by_index(dev_addr.net,
1125 dev_addr.bound_dev_if);
1126 if (resolved_dev->flags & IFF_LOOPBACK) {
1127 dev_put(resolved_dev);
1128 resolved_dev = idev;
1129 dev_hold(resolved_dev);
1130 }
1131 ndev = ib_get_ndev_from_path(rec);
1132 rcu_read_lock();
1133 if ((ndev && ndev != resolved_dev) ||
1134 (resolved_dev != idev &&
1135 !rdma_is_upper_dev_rcu(idev, resolved_dev)))
1136 ret = -EHOSTUNREACH;
1137 rcu_read_unlock();
1138 dev_put(idev);
1139 dev_put(resolved_dev);
1140 if (ret) {
1141 if (ndev)
1142 dev_put(ndev);
1143 return ret;
1144 }
1145 }
ba36e37f 1146
11d8d645 1147 if (rec->hop_limit > 0 || use_roce) {
6d969a47
SH		 1148 ah_attr->ah_flags = IB_AH_GRH;
1149 ah_attr->grh.dgid = rec->dgid;
1150
20029832
MB		 1151 ret = ib_find_cached_gid_by_port(device, &rec->sgid,
1152 rec->gid_type, port_num, ndev,
1153 &gid_index);
ba36e37f
MB		 1154 if (ret) {
1155 if (ndev)
1156 dev_put(ndev);
6d969a47 1157 return ret;
ba36e37f 1158 }
6d969a47 1159
ca222c6b
SH		 1160 ah_attr->grh.sgid_index = gid_index;
1161 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label);
1162 ah_attr->grh.hop_limit = rec->hop_limit;
6d969a47 1163 ah_attr->grh.traffic_class = rec->traffic_class;
ba36e37f
MB		 1164 if (ndev)
1165 dev_put(ndev);
6d969a47 1166 }
20029832
MB		 1167
1168 if (use_roce)
dd5f03be 1169 memcpy(ah_attr->dmac, rec->dmac, ETH_ALEN);
20029832 1170
6d969a47
SH		 1171 return 0;
1172}
1173EXPORT_SYMBOL(ib_init_ah_from_path);
1174
2aec5c60
SH		 1175static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1176{
1177 unsigned long flags;
1178
1179 spin_lock_irqsave(&query->port->ah_lock, flags);
164ba089
MS		 1180 if (!query->port->sm_ah) {
1181 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1182 return -EAGAIN;
1183 }
2aec5c60
SH		 1184 kref_get(&query->port->sm_ah->ref);
1185 query->sm_ah = query->port->sm_ah;
1186 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1187
1188 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1189 query->sm_ah->pkey_index,
1190 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
da2dfaa3
IW		 1191 gfp_mask,
1192 IB_MGMT_BASE_VERSION);
3c10c7c9 1193 if (IS_ERR(query->mad_buf)) {
2aec5c60
SH		 1194 kref_put(&query->sm_ah->ref, free_sm_ah);
1195 return -ENOMEM;
1196 }
1197
1198 query->mad_buf->ah = query->sm_ah->ah;
1199
1200 return 0;
1201}
1202
1203static void free_mad(struct ib_sa_query *query)
1204{
1205 ib_free_send_mad(query->mad_buf);
1206 kref_put(&query->sm_ah->ref, free_sm_ah);
1207}
1208
1da177e4
LT		 1209static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
1210{
1211 unsigned long flags;
1212
1213 memset(mad, 0, sizeof *mad);
1214
1215 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
1216 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
1217 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1218
1219 spin_lock_irqsave(&tid_lock, flags);
1220 mad->mad_hdr.tid =
1221 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1222 spin_unlock_irqrestore(&tid_lock, flags);
1223}
1224
e322fedf 1225static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
1da177e4 1226{
d0164adc 1227 bool preload = gfpflags_allow_blocking(gfp_mask);
1da177e4 1228 unsigned long flags;
34816ad9 1229 int ret, id;
1da177e4 1230
3b069c5d
TH		 1231 if (preload)
1232 idr_preload(gfp_mask);
1da177e4 1233 spin_lock_irqsave(&idr_lock, flags);
3b069c5d
TH		 1234
1235 id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
1236
1da177e4 1237 spin_unlock_irqrestore(&idr_lock, flags);
3b069c5d
TH		 1238 if (preload)
1239 idr_preload_end();
1240 if (id < 0)
1241 return id;
1da177e4 1242
34816ad9
SH		 1243 query->mad_buf->timeout_ms = timeout_ms;
1244 query->mad_buf->context[0] = query;
1245 query->id = id;
1da177e4 1246
2ca546b9
KW		 1247 if (query->flags & IB_SA_ENABLE_LOCAL_SERVICE) {
1248 if (!ibnl_chk_listeners(RDMA_NL_GROUP_LS)) {
3ebd2fd0 1249 if (!ib_nl_make_request(query, gfp_mask))
2ca546b9
KW		 1250 return id;
1251 }
1252 ib_sa_disable_local_svc(query);
1253 }
1254
34816ad9 1255 ret = ib_post_send_mad(query->mad_buf, NULL);
1da177e4 1256 if (ret) {
1da177e4 1257 spin_lock_irqsave(&idr_lock, flags);
34816ad9 1258 idr_remove(&query_idr, id);
1da177e4
LT		 1259 spin_unlock_irqrestore(&idr_lock, flags);
1260 }
1261
dae4c1d2
RD		 1262 /*
1263 * It's not safe to dereference query any more, because the
1264 * send may already have completed and freed the query in
34816ad9 1265 * another context.
dae4c1d2 1266 */
34816ad9 1267 return ret ? ret : id;
1da177e4
LT		 1268}
1269
a7ca1f00
SH		 1270void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec)
1271{
1272 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1273}
1274EXPORT_SYMBOL(ib_sa_unpack_path);
1275
2e08b587
SH		 1276void ib_sa_pack_path(struct ib_sa_path_rec *rec, void *attribute)
1277{
1278 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1279}
1280EXPORT_SYMBOL(ib_sa_pack_path);
1281
1da177e4
LT		 1282static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1283 int status,
1284 struct ib_sa_mad *mad)
1285{
1286 struct ib_sa_path_query *query =
1287 container_of(sa_query, struct ib_sa_path_query, sa_query);
1288
1289 if (mad) {
1290 struct ib_sa_path_rec rec;
1291
1292 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
1293 mad->data, &rec);
ba36e37f
MB		 1294 rec.net = NULL;
1295 rec.ifindex = 0;
b39ffa1d 1296 rec.gid_type = IB_GID_TYPE_IB;
db9314cd 1297 eth_zero_addr(rec.dmac);
1da177e4
LT		 1298 query->callback(status, &rec, query->context);
1299 } else
1300 query->callback(status, NULL, query->context);
1301}
1302
1303static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1304{
1da177e4
LT		 1305 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
1306}
1307
1308/**
1309 * ib_sa_path_rec_get - Start a Path get query
c1a0b23b 1310 * @client:SA client
1da177e4
LT		 1311 * @device:device to send query on
1312 * @port_num: port number to send query on
1313 * @rec:Path Record to send in query
1314 * @comp_mask:component mask to send in query
1315 * @timeout_ms:time to wait for response
1316 * @gfp_mask:GFP mask to use for internal allocations
1317 * @callback:function called when query completes, times out or is
1318 * canceled
1319 * @context:opaque user context passed to callback
1320 * @sa_query:query context, used to cancel query
1321 *
1322 * Send a Path Record Get query to the SA to look up a path. The
1323 * callback function will be called when the query completes (or
1324 * fails); status is 0 for a successful response, -EINTR if the query
1325 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1326 * occurred sending the query. The resp parameter of the callback is
1327 * only valid if status is 0.
1328 *
1329 * If the return value of ib_sa_path_rec_get() is negative, it is an
1330 * error code. Otherwise it is a query ID that can be used to cancel
1331 * the query.
1332 */
c1a0b23b
MT		 1333int ib_sa_path_rec_get(struct ib_sa_client *client,
1334 struct ib_device *device, u8 port_num,
1da177e4
LT		 1335 struct ib_sa_path_rec *rec,
1336 ib_sa_comp_mask comp_mask,
dd0fc66f 1337 int timeout_ms, gfp_t gfp_mask,
1da177e4
LT		 1338 void (*callback)(int status,
1339 struct ib_sa_path_rec *resp,
1340 void *context),
1341 void *context,
1342 struct ib_sa_query **sa_query)
1343{
1344 struct ib_sa_path_query *query;
1345 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
56c202d6
RD		 1346 struct ib_sa_port *port;
1347 struct ib_mad_agent *agent;
34816ad9 1348 struct ib_sa_mad *mad;
1da177e4
LT		 1349 int ret;
1350
56c202d6
RD		 1351 if (!sa_dev)
1352 return -ENODEV;
1353
1354 port = &sa_dev->port[port_num - sa_dev->start_port];
1355 agent = port->agent;
1356
5d265770 1357 query = kzalloc(sizeof(*query), gfp_mask);
1da177e4
LT		 1358 if (!query)
1359 return -ENOMEM;
34816ad9 1360
2aec5c60
SH		 1361 query->sa_query.port = port;
1362 ret = alloc_mad(&query->sa_query, gfp_mask);
1363 if (ret)
34816ad9 1364 goto err1;
1da177e4 1365
c1a0b23b
MT		 1366 ib_sa_client_get(client);
1367 query->sa_query.client = client;
1368 query->callback = callback;
1369 query->context = context;
1da177e4 1370
34816ad9
SH		 1371 mad = query->sa_query.mad_buf->mad;
1372 init_mad(mad, agent);
1da177e4 1373
34816ad9
SH		 1374 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1375 query->sa_query.release = ib_sa_path_rec_release;
34816ad9
SH		 1376 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1377 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1378 mad->sa_hdr.comp_mask = comp_mask;
1da177e4 1379
34816ad9 1380 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
1da177e4
LT		 1381
1382 *sa_query = &query->sa_query;
dae4c1d2 1383
2ca546b9
KW		 1384 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1385 query->sa_query.mad_buf->context[1] = rec;
1386
e322fedf 1387 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
34816ad9
SH		 1388 if (ret < 0)
1389 goto err2;
1390
1391 return ret;
1392
1393err2:
1394 *sa_query = NULL;
c1a0b23b 1395 ib_sa_client_put(query->sa_query.client);
2aec5c60 1396 free_mad(&query->sa_query);
1da177e4 1397
34816ad9
SH		 1398err1:
1399 kfree(query);
dae4c1d2 1400 return ret;
1da177e4
LT		 1401}
1402EXPORT_SYMBOL(ib_sa_path_rec_get);
1403
cbae32c5
HR		 1404static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1405 int status,
1406 struct ib_sa_mad *mad)
1407{
1408 struct ib_sa_service_query *query =
1409 container_of(sa_query, struct ib_sa_service_query, sa_query);
1410
1411 if (mad) {
1412 struct ib_sa_service_rec rec;
1413
1414 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1415 mad->data, &rec);
1416 query->callback(status, &rec, query->context);
1417 } else
1418 query->callback(status, NULL, query->context);
1419}
1420
1421static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1422{
cbae32c5
HR		 1423 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1424}
1425
1426/**
1427 * ib_sa_service_rec_query - Start Service Record operation
c1a0b23b 1428 * @client:SA client
cbae32c5
HR		 1429 * @device:device to send request on
1430 * @port_num: port number to send request on
1431 * @method:SA method - should be get, set, or delete
1432 * @rec:Service Record to send in request
1433 * @comp_mask:component mask to send in request
1434 * @timeout_ms:time to wait for response
1435 * @gfp_mask:GFP mask to use for internal allocations
1436 * @callback:function called when request completes, times out or is
1437 * canceled
1438 * @context:opaque user context passed to callback
1439 * @sa_query:request context, used to cancel request
1440 *
1441 * Send a Service Record set/get/delete to the SA to register,
1442 * unregister or query a service record.
1443 * The callback function will be called when the request completes (or
1444 * fails); status is 0 for a successful response, -EINTR if the query
1445 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1446 * occurred sending the query. The resp parameter of the callback is
1447 * only valid if status is 0.
1448 *
1449 * If the return value of ib_sa_service_rec_query() is negative, it is an
1450 * error code. Otherwise it is a request ID that can be used to cancel
1451 * the query.
1452 */
c1a0b23b
MT		 1453int ib_sa_service_rec_query(struct ib_sa_client *client,
1454 struct ib_device *device, u8 port_num, u8 method,
cbae32c5
HR		 1455 struct ib_sa_service_rec *rec,
1456 ib_sa_comp_mask comp_mask,
dd0fc66f 1457 int timeout_ms, gfp_t gfp_mask,
cbae32c5
HR		 1458 void (*callback)(int status,
1459 struct ib_sa_service_rec *resp,
1460 void *context),
1461 void *context,
1462 struct ib_sa_query **sa_query)
1463{
1464 struct ib_sa_service_query *query;
1465 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
56c202d6
RD		 1466 struct ib_sa_port *port;
1467 struct ib_mad_agent *agent;
34816ad9 1468 struct ib_sa_mad *mad;
cbae32c5
HR		 1469 int ret;
1470
56c202d6
RD		 1471 if (!sa_dev)
1472 return -ENODEV;
1473
1474 port = &sa_dev->port[port_num - sa_dev->start_port];
1475 agent = port->agent;
1476
cbae32c5
HR		 1477 if (method != IB_MGMT_METHOD_GET &&
1478 method != IB_MGMT_METHOD_SET &&
1479 method != IB_SA_METHOD_DELETE)
1480 return -EINVAL;
1481
5d265770 1482 query = kzalloc(sizeof(*query), gfp_mask);
cbae32c5
HR		 1483 if (!query)
1484 return -ENOMEM;
34816ad9 1485
2aec5c60
SH		 1486 query->sa_query.port = port;
1487 ret = alloc_mad(&query->sa_query, gfp_mask);
1488 if (ret)
34816ad9 1489 goto err1;
cbae32c5 1490
c1a0b23b
MT		 1491 ib_sa_client_get(client);
1492 query->sa_query.client = client;
1493 query->callback = callback;
1494 query->context = context;
cbae32c5 1495
34816ad9
SH		 1496 mad = query->sa_query.mad_buf->mad;
1497 init_mad(mad, agent);
cbae32c5 1498
34816ad9
SH		 1499 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1500 query->sa_query.release = ib_sa_service_rec_release;
34816ad9
SH		 1501 mad->mad_hdr.method = method;
1502 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1503 mad->sa_hdr.comp_mask = comp_mask;
cbae32c5
HR		 1504
1505 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
34816ad9 1506 rec, mad->data);
cbae32c5
HR		 1507
1508 *sa_query = &query->sa_query;
1509
e322fedf 1510 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
34816ad9
SH		 1511 if (ret < 0)
1512 goto err2;
1513
1514 return ret;
cbae32c5 1515
34816ad9
SH		 1516err2:
1517 *sa_query = NULL;
c1a0b23b 1518 ib_sa_client_put(query->sa_query.client);
2aec5c60 1519 free_mad(&query->sa_query);
34816ad9
SH		 1520
1521err1:
1522 kfree(query);
cbae32c5
HR		 1523 return ret;
1524}
1525EXPORT_SYMBOL(ib_sa_service_rec_query);
1526
1da177e4
LT		 1527static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1528 int status,
1529 struct ib_sa_mad *mad)
1530{
1531 struct ib_sa_mcmember_query *query =
1532 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1533
1534 if (mad) {
1535 struct ib_sa_mcmember_rec rec;
1536
1537 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1538 mad->data, &rec);
1539 query->callback(status, &rec, query->context);
1540 } else
1541 query->callback(status, NULL, query->context);
1542}
1543
1544static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1545{
1da177e4
LT		 1546 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1547}
1548
c1a0b23b
MT		 1549int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1550 struct ib_device *device, u8 port_num,
1da177e4
LT		 1551 u8 method,
1552 struct ib_sa_mcmember_rec *rec,
1553 ib_sa_comp_mask comp_mask,
dd0fc66f 1554 int timeout_ms, gfp_t gfp_mask,
1da177e4
LT		 1555 void (*callback)(int status,
1556 struct ib_sa_mcmember_rec *resp,
1557 void *context),
1558 void *context,
1559 struct ib_sa_query **sa_query)
1560{
1561 struct ib_sa_mcmember_query *query;
1562 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
56c202d6
RD		 1563 struct ib_sa_port *port;
1564 struct ib_mad_agent *agent;
34816ad9 1565 struct ib_sa_mad *mad;
1da177e4
LT		 1566 int ret;
1567
56c202d6
RD		 1568 if (!sa_dev)
1569 return -ENODEV;
1570
1571 port = &sa_dev->port[port_num - sa_dev->start_port];
1572 agent = port->agent;
1573
5d265770 1574 query = kzalloc(sizeof(*query), gfp_mask);
1da177e4
LT		 1575 if (!query)
1576 return -ENOMEM;
34816ad9 1577
2aec5c60
SH		 1578 query->sa_query.port = port;
1579 ret = alloc_mad(&query->sa_query, gfp_mask);
1580 if (ret)
34816ad9 1581 goto err1;
1da177e4 1582
c1a0b23b
MT		 1583 ib_sa_client_get(client);
1584 query->sa_query.client = client;
1585 query->callback = callback;
1586 query->context = context;
1da177e4 1587
34816ad9
SH		 1588 mad = query->sa_query.mad_buf->mad;
1589 init_mad(mad, agent);
1da177e4 1590
34816ad9
SH		 1591 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1592 query->sa_query.release = ib_sa_mcmember_rec_release;
34816ad9
SH		 1593 mad->mad_hdr.method = method;
1594 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1595 mad->sa_hdr.comp_mask = comp_mask;
1da177e4
LT		 1596
1597 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
34816ad9 1598 rec, mad->data);
1da177e4
LT		 1599
1600 *sa_query = &query->sa_query;
dae4c1d2 1601
e322fedf 1602 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
34816ad9
SH		 1603 if (ret < 0)
1604 goto err2;
1da177e4 1605
dae4c1d2 1606 return ret;
34816ad9
SH		 1607
1608err2:
1609 *sa_query = NULL;
c1a0b23b 1610 ib_sa_client_put(query->sa_query.client);
2aec5c60 1611 free_mad(&query->sa_query);
34816ad9
SH		 1612
1613err1:
1614 kfree(query);
1615 return ret;
1da177e4 1616}
1da177e4 1617
aeab97ed
ES		 1618/* Support GuidInfoRecord */
1619static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1620 int status,
1621 struct ib_sa_mad *mad)
1622{
1623 struct ib_sa_guidinfo_query *query =
1624 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1625
1626 if (mad) {
1627 struct ib_sa_guidinfo_rec rec;
1628
1629 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1630 mad->data, &rec);
1631 query->callback(status, &rec, query->context);
1632 } else
1633 query->callback(status, NULL, query->context);
1634}
1635
1636static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1637{
1638 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1639}
1640
1641int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1642 struct ib_device *device, u8 port_num,
1643 struct ib_sa_guidinfo_rec *rec,
1644 ib_sa_comp_mask comp_mask, u8 method,
1645 int timeout_ms, gfp_t gfp_mask,
1646 void (*callback)(int status,
1647 struct ib_sa_guidinfo_rec *resp,
1648 void *context),
1649 void *context,
1650 struct ib_sa_query **sa_query)
1651{
1652 struct ib_sa_guidinfo_query *query;
1653 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1654 struct ib_sa_port *port;
1655 struct ib_mad_agent *agent;
1656 struct ib_sa_mad *mad;
1657 int ret;
1658
1659 if (!sa_dev)
1660 return -ENODEV;
1661
1662 if (method != IB_MGMT_METHOD_GET &&
1663 method != IB_MGMT_METHOD_SET &&
1664 method != IB_SA_METHOD_DELETE) {
1665 return -EINVAL;
1666 }
1667
1668 port = &sa_dev->port[port_num - sa_dev->start_port];
1669 agent = port->agent;
1670
5d265770 1671 query = kzalloc(sizeof(*query), gfp_mask);
aeab97ed
ES		 1672 if (!query)
1673 return -ENOMEM;
1674
1675 query->sa_query.port = port;
1676 ret = alloc_mad(&query->sa_query, gfp_mask);
1677 if (ret)
1678 goto err1;
1679
1680 ib_sa_client_get(client);
1681 query->sa_query.client = client;
1682 query->callback = callback;
1683 query->context = context;
1684
1685 mad = query->sa_query.mad_buf->mad;
1686 init_mad(mad, agent);
1687
1688 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1689 query->sa_query.release = ib_sa_guidinfo_rec_release;
1690
1691 mad->mad_hdr.method = method;
1692 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1693 mad->sa_hdr.comp_mask = comp_mask;
1694
1695 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1696 mad->data);
1697
1698 *sa_query = &query->sa_query;
1699
1700 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1701 if (ret < 0)
1702 goto err2;
1703
1704 return ret;
1705
1706err2:
1707 *sa_query = NULL;
1708 ib_sa_client_put(query->sa_query.client);
1709 free_mad(&query->sa_query);
1710
1711err1:
1712 kfree(query);
1713 return ret;
1714}
1715EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
1716
628e6f75
ES		 1717/* Support get SA ClassPortInfo */
1718static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
1719 int status,
1720 struct ib_sa_mad *mad)
1721{
1722 struct ib_sa_classport_info_query *query =
1723 container_of(sa_query, struct ib_sa_classport_info_query, sa_query);
1724
1725 if (mad) {
1726 struct ib_class_port_info rec;
1727
1728 ib_unpack(classport_info_rec_table,
1729 ARRAY_SIZE(classport_info_rec_table),
1730 mad->data, &rec);
1731 query->callback(status, &rec, query->context);
1732 } else {
1733 query->callback(status, NULL, query->context);
1734 }
1735}
1736
1737static void ib_sa_portclass_info_rec_release(struct ib_sa_query *sa_query)
1738{
1739 kfree(container_of(sa_query, struct ib_sa_classport_info_query,
1740 sa_query));
1741}
1742
1743int ib_sa_classport_info_rec_query(struct ib_sa_client *client,
1744 struct ib_device *device, u8 port_num,
1745 int timeout_ms, gfp_t gfp_mask,
1746 void (*callback)(int status,
1747 struct ib_class_port_info *resp,
1748 void *context),
1749 void *context,
1750 struct ib_sa_query **sa_query)
1751{
1752 struct ib_sa_classport_info_query *query;
1753 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1754 struct ib_sa_port *port;
1755 struct ib_mad_agent *agent;
1756 struct ib_sa_mad *mad;
1757 int ret;
1758
1759 if (!sa_dev)
1760 return -ENODEV;
1761
1762 port = &sa_dev->port[port_num - sa_dev->start_port];
1763 agent = port->agent;
1764
1765 query = kzalloc(sizeof(*query), gfp_mask);
1766 if (!query)
1767 return -ENOMEM;
1768
1769 query->sa_query.port = port;
1770 ret = alloc_mad(&query->sa_query, gfp_mask);
1771 if (ret)
1772 goto err1;
1773
1774 ib_sa_client_get(client);
1775 query->sa_query.client = client;
1776 query->callback = callback;
1777 query->context = context;
1778
1779 mad = query->sa_query.mad_buf->mad;
1780 init_mad(mad, agent);
1781
1782 query->sa_query.callback = callback ? ib_sa_classport_info_rec_callback : NULL;
1783
1784 query->sa_query.release = ib_sa_portclass_info_rec_release;
1785 /* support GET only */
1786 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1787 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO);
1788 mad->sa_hdr.comp_mask = 0;
1789 *sa_query = &query->sa_query;
1790
1791 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1792 if (ret < 0)
1793 goto err2;
1794
1795 return ret;
1796
1797err2:
1798 *sa_query = NULL;
1799 ib_sa_client_put(query->sa_query.client);
1800 free_mad(&query->sa_query);
1801
1802err1:
1803 kfree(query);
1804 return ret;
1805}
1806EXPORT_SYMBOL(ib_sa_classport_info_rec_query);
1807
1da177e4
LT		 1808static void send_handler(struct ib_mad_agent *agent,
1809 struct ib_mad_send_wc *mad_send_wc)
1810{
34816ad9 1811 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
1da177e4
LT		 1812 unsigned long flags;
1813
e4f50f00
RD		 1814 if (query->callback)
1815 switch (mad_send_wc->status) {
1816 case IB_WC_SUCCESS:
1817 /* No callback -- already got recv */
1818 break;
1819 case IB_WC_RESP_TIMEOUT_ERR:
1820 query->callback(query, -ETIMEDOUT, NULL);
1821 break;
1822 case IB_WC_WR_FLUSH_ERR:
1823 query->callback(query, -EINTR, NULL);
1824 break;
1825 default:
1826 query->callback(query, -EIO, NULL);
1827 break;
1828 }
1da177e4 1829
1da177e4 1830 spin_lock_irqsave(&idr_lock, flags);
34816ad9 1831 idr_remove(&query_idr, query->id);
1da177e4 1832 spin_unlock_irqrestore(&idr_lock, flags);
34816ad9 1833
2aec5c60 1834 free_mad(query);
c1a0b23b 1835 ib_sa_client_put(query->client);
34816ad9 1836 query->release(query);
1da177e4
LT		 1837}
1838
1839static void recv_handler(struct ib_mad_agent *mad_agent,
ca281265 1840 struct ib_mad_send_buf *send_buf,
1da177e4
LT		 1841 struct ib_mad_recv_wc *mad_recv_wc)
1842{
1843 struct ib_sa_query *query;
1da177e4 1844
ca281265
CH		 1845 if (!send_buf)
1846 return;
1da177e4 1847
ca281265 1848 query = send_buf->context[0];
34816ad9 1849 if (query->callback) {
1da177e4
LT		 1850 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
1851 query->callback(query,
1852 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
1853 -EINVAL : 0,
1854 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
1855 else
1856 query->callback(query, -EIO, NULL);
1857 }
1858
1859 ib_free_recv_mad(mad_recv_wc);
1860}
1861
1862static void ib_sa_add_one(struct ib_device *device)
1863{
1864 struct ib_sa_device *sa_dev;
1865 int s, e, i;
08e3681a 1866 int count = 0;
07ebafba 1867
4139032b
HR		 1868 s = rdma_start_port(device);
1869 e = rdma_end_port(device);
1da177e4 1870
fac70d51 1871 sa_dev = kzalloc(sizeof *sa_dev +
1da177e4
LT		 1872 (e - s + 1) * sizeof (struct ib_sa_port),
1873 GFP_KERNEL);
1874 if (!sa_dev)
1875 return;
1876
1877 sa_dev->start_port = s;
1878 sa_dev->end_port = e;
1879
1880 for (i = 0; i <= e - s; ++i) {
fac70d51 1881 spin_lock_init(&sa_dev->port[i].ah_lock);
fe53ba2f 1882 if (!rdma_cap_ib_sa(device, i + 1))
fac70d51
EC		 1883 continue;
1884
1da177e4
LT		 1885 sa_dev->port[i].sm_ah = NULL;
1886 sa_dev->port[i].port_num = i + s;
1da177e4
LT		 1887
1888 sa_dev->port[i].agent =
1889 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
1890 NULL, 0, send_handler,
0f29b46d 1891 recv_handler, sa_dev, 0);
1da177e4
LT		 1892 if (IS_ERR(sa_dev->port[i].agent))
1893 goto err;
1894
c4028958 1895 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
08e3681a
MW		 1896
1897 count++;
1da177e4
LT		 1898 }
1899
08e3681a
MW		 1900 if (!count)
1901 goto free;
1902
1da177e4
LT		 1903 ib_set_client_data(device, &sa_client, sa_dev);
1904
1905 /*
1906 * We register our event handler after everything is set up,
1907 * and then update our cached info after the event handler is
1908 * registered to avoid any problems if a port changes state
1909 * during our initialization.
1910 */
1911
1912 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
1913 if (ib_register_event_handler(&sa_dev->event_handler))
1914 goto err;
1915
08e3681a 1916 for (i = 0; i <= e - s; ++i) {
fe53ba2f 1917 if (rdma_cap_ib_sa(device, i + 1))
fac70d51 1918 update_sm_ah(&sa_dev->port[i].update_task);
08e3681a 1919 }
1da177e4
LT		 1920
1921 return;
1922
1923err:
08e3681a 1924 while (--i >= 0) {
fe53ba2f 1925 if (rdma_cap_ib_sa(device, i + 1))
fac70d51 1926 ib_unregister_mad_agent(sa_dev->port[i].agent);
08e3681a
MW		 1927 }
1928free:
1da177e4 1929 kfree(sa_dev);
1da177e4
LT		 1930 return;
1931}
1932
7c1eb45a 1933static void ib_sa_remove_one(struct ib_device *device, void *client_data)
1da177e4 1934{
7c1eb45a 1935 struct ib_sa_device *sa_dev = client_data;
1da177e4
LT		 1936 int i;
1937
1938 if (!sa_dev)
1939 return;
1940
1941 ib_unregister_event_handler(&sa_dev->event_handler);
1942
96e61fa5 1943 flush_workqueue(ib_wq);
0f47ae0b 1944
1da177e4 1945 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
fe53ba2f 1946 if (rdma_cap_ib_sa(device, i + 1)) {
fac70d51
EC		 1947 ib_unregister_mad_agent(sa_dev->port[i].agent);
1948 if (sa_dev->port[i].sm_ah)
1949 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
1950 }
1951
1da177e4
LT		 1952 }
1953
1954 kfree(sa_dev);
1955}
1956
c2e49c92 1957int ib_sa_init(void)
1da177e4
LT		 1958{
1959 int ret;
1960
1da177e4
LT		 1961 get_random_bytes(&tid, sizeof tid);
1962
2ca546b9
KW		 1963 atomic_set(&ib_nl_sa_request_seq, 0);
1964
1da177e4 1965 ret = ib_register_client(&sa_client);
faec2f7b 1966 if (ret) {
aba25a3e 1967 pr_err("Couldn't register ib_sa client\n");
faec2f7b
SH		 1968 goto err1;
1969 }
1970
1971 ret = mcast_init();
1972 if (ret) {
aba25a3e 1973 pr_err("Couldn't initialize multicast handling\n");
faec2f7b
SH		 1974 goto err2;
1975 }
1da177e4 1976
2ca546b9
KW		 1977 ib_nl_wq = create_singlethread_workqueue("ib_nl_sa_wq");
1978 if (!ib_nl_wq) {
1979 ret = -ENOMEM;
1980 goto err3;
1981 }
1982
2ca546b9
KW		 1983 INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
1984
faec2f7b 1985 return 0;
735c631a 1986
2ca546b9
KW		 1987err3:
1988 mcast_cleanup();
faec2f7b
SH		 1989err2:
1990 ib_unregister_client(&sa_client);
1991err1:
1da177e4
LT		 1992 return ret;
1993}
1994
c2e49c92 1995void ib_sa_cleanup(void)
1da177e4 1996{
2ca546b9
KW		 1997 cancel_delayed_work(&ib_nl_timed_work);
1998 flush_workqueue(ib_nl_wq);
1999 destroy_workqueue(ib_nl_wq);
faec2f7b 2000 mcast_cleanup();
1da177e4 2001 ib_unregister_client(&sa_client);
5d7edb3c 2002 idr_destroy(&query_idr);
1da177e4 2003}
Linux kernel - Deliverables
This page took 0.926303 seconds and 5 git commands to generate.