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Merge tag 'regmap-fix-v4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux/fpc-iii.git] / drivers / infiniband / core / sa_query.c
blob81b742ca163911f3cfe6ffc42ea624931e7f3089
1 /*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
4 * Copyright (c) 2006 Intel Corporation. All rights reserved.
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.
33 */
34
35 #include <linux/module.h>
36 #include <linux/init.h>
37 #include <linux/err.h>
38 #include <linux/random.h>
39 #include <linux/spinlock.h>
40 #include <linux/slab.h>
41 #include <linux/dma-mapping.h>
42 #include <linux/kref.h>
43 #include <linux/idr.h>
44 #include <linux/workqueue.h>
45 #include <uapi/linux/if_ether.h>
46 #include <rdma/ib_pack.h>
47 #include <rdma/ib_cache.h>
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>
52 #include <rdma/ib_addr.h>
53 #include "sa.h"
54 #include "core_priv.h"
55
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
59 static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT;
60
61 struct ib_sa_sm_ah {
62 struct ib_ah *ah;
63 struct kref ref;
64 u16 pkey_index;
65 u8 src_path_mask;
66 };
67
68 struct ib_sa_classport_cache {
69 bool valid;
70 struct ib_class_port_info data;
71 };
72
73 struct ib_sa_port {
74 struct ib_mad_agent *agent;
75 struct ib_sa_sm_ah *sm_ah;
76 struct work_struct update_task;
77 struct ib_sa_classport_cache classport_info;
78 spinlock_t classport_lock; /* protects class port info set */
79 spinlock_t ah_lock;
80 u8 port_num;
81 };
82
83 struct ib_sa_device {
84 int start_port, end_port;
85 struct ib_event_handler event_handler;
86 struct ib_sa_port port[0];
87 };
88
89 struct ib_sa_query {
90 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
91 void (*release)(struct ib_sa_query *);
92 struct ib_sa_client *client;
93 struct ib_sa_port *port;
94 struct ib_mad_send_buf *mad_buf;
95 struct ib_sa_sm_ah *sm_ah;
96 int id;
97 u32 flags;
98 struct list_head list; /* Local svc request list */
99 u32 seq; /* Local svc request sequence number */
100 unsigned long timeout; /* Local svc timeout */
101 u8 path_use; /* How will the pathrecord be used */
102 };
103
104 #define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001
105 #define IB_SA_CANCEL 0x00000002
106
107 struct ib_sa_service_query {
108 void (*callback)(int, struct ib_sa_service_rec *, void *);
109 void *context;
110 struct ib_sa_query sa_query;
111 };
112
113 struct ib_sa_path_query {
114 void (*callback)(int, struct ib_sa_path_rec *, void *);
115 void *context;
116 struct ib_sa_query sa_query;
117 };
118
119 struct ib_sa_guidinfo_query {
120 void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
121 void *context;
122 struct ib_sa_query sa_query;
123 };
124
125 struct ib_sa_classport_info_query {
126 void (*callback)(int, struct ib_class_port_info *, void *);
127 void *context;
128 struct ib_sa_query sa_query;
129 };
130
131 struct ib_sa_mcmember_query {
132 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
133 void *context;
134 struct ib_sa_query sa_query;
135 };
136
137 static LIST_HEAD(ib_nl_request_list);
138 static DEFINE_SPINLOCK(ib_nl_request_lock);
139 static atomic_t ib_nl_sa_request_seq;
140 static struct workqueue_struct *ib_nl_wq;
141 static struct delayed_work ib_nl_timed_work;
142 static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = {
143 [LS_NLA_TYPE_PATH_RECORD] = {.type = NLA_BINARY,
144 .len = sizeof(struct ib_path_rec_data)},
145 [LS_NLA_TYPE_TIMEOUT] = {.type = NLA_U32},
146 [LS_NLA_TYPE_SERVICE_ID] = {.type = NLA_U64},
147 [LS_NLA_TYPE_DGID] = {.type = NLA_BINARY,
148 .len = sizeof(struct rdma_nla_ls_gid)},
149 [LS_NLA_TYPE_SGID] = {.type = NLA_BINARY,
150 .len = sizeof(struct rdma_nla_ls_gid)},
151 [LS_NLA_TYPE_TCLASS] = {.type = NLA_U8},
152 [LS_NLA_TYPE_PKEY] = {.type = NLA_U16},
153 [LS_NLA_TYPE_QOS_CLASS] = {.type = NLA_U16},
154 };
155
156
157 static void ib_sa_add_one(struct ib_device *device);
158 static void ib_sa_remove_one(struct ib_device *device, void *client_data);
159
160 static struct ib_client sa_client = {
161 .name = "sa",
162 .add = ib_sa_add_one,
163 .remove = ib_sa_remove_one
164 };
165
166 static DEFINE_SPINLOCK(idr_lock);
167 static DEFINE_IDR(query_idr);
168
169 static DEFINE_SPINLOCK(tid_lock);
170 static u32 tid;
171
172 #define PATH_REC_FIELD(field) \
173 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
174 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
175 .field_name = "sa_path_rec:" #field
176
177 static const struct ib_field path_rec_table[] = {
178 { PATH_REC_FIELD(service_id),
179 .offset_words = 0,
180 .offset_bits = 0,
181 .size_bits = 64 },
182 { PATH_REC_FIELD(dgid),
183 .offset_words = 2,
184 .offset_bits = 0,
185 .size_bits = 128 },
186 { PATH_REC_FIELD(sgid),
187 .offset_words = 6,
188 .offset_bits = 0,
189 .size_bits = 128 },
190 { PATH_REC_FIELD(dlid),
191 .offset_words = 10,
192 .offset_bits = 0,
193 .size_bits = 16 },
194 { PATH_REC_FIELD(slid),
195 .offset_words = 10,
196 .offset_bits = 16,
197 .size_bits = 16 },
198 { PATH_REC_FIELD(raw_traffic),
199 .offset_words = 11,
200 .offset_bits = 0,
201 .size_bits = 1 },
202 { RESERVED,
203 .offset_words = 11,
204 .offset_bits = 1,
205 .size_bits = 3 },
206 { PATH_REC_FIELD(flow_label),
207 .offset_words = 11,
208 .offset_bits = 4,
209 .size_bits = 20 },
210 { PATH_REC_FIELD(hop_limit),
211 .offset_words = 11,
212 .offset_bits = 24,
213 .size_bits = 8 },
214 { PATH_REC_FIELD(traffic_class),
215 .offset_words = 12,
216 .offset_bits = 0,
217 .size_bits = 8 },
218 { PATH_REC_FIELD(reversible),
219 .offset_words = 12,
220 .offset_bits = 8,
221 .size_bits = 1 },
222 { PATH_REC_FIELD(numb_path),
223 .offset_words = 12,
224 .offset_bits = 9,
225 .size_bits = 7 },
226 { PATH_REC_FIELD(pkey),
227 .offset_words = 12,
228 .offset_bits = 16,
229 .size_bits = 16 },
230 { PATH_REC_FIELD(qos_class),
231 .offset_words = 13,
232 .offset_bits = 0,
233 .size_bits = 12 },
234 { PATH_REC_FIELD(sl),
235 .offset_words = 13,
236 .offset_bits = 12,
237 .size_bits = 4 },
238 { PATH_REC_FIELD(mtu_selector),
239 .offset_words = 13,
240 .offset_bits = 16,
241 .size_bits = 2 },
242 { PATH_REC_FIELD(mtu),
243 .offset_words = 13,
244 .offset_bits = 18,
245 .size_bits = 6 },
246 { PATH_REC_FIELD(rate_selector),
247 .offset_words = 13,
248 .offset_bits = 24,
249 .size_bits = 2 },
250 { PATH_REC_FIELD(rate),
251 .offset_words = 13,
252 .offset_bits = 26,
253 .size_bits = 6 },
254 { PATH_REC_FIELD(packet_life_time_selector),
255 .offset_words = 14,
256 .offset_bits = 0,
257 .size_bits = 2 },
258 { PATH_REC_FIELD(packet_life_time),
259 .offset_words = 14,
260 .offset_bits = 2,
261 .size_bits = 6 },
262 { PATH_REC_FIELD(preference),
263 .offset_words = 14,
264 .offset_bits = 8,
265 .size_bits = 8 },
266 { RESERVED,
267 .offset_words = 14,
268 .offset_bits = 16,
269 .size_bits = 48 },
270 };
271
272 #define MCMEMBER_REC_FIELD(field) \
273 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
274 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
275 .field_name = "sa_mcmember_rec:" #field
276
277 static const struct ib_field mcmember_rec_table[] = {
278 { MCMEMBER_REC_FIELD(mgid),
279 .offset_words = 0,
280 .offset_bits = 0,
281 .size_bits = 128 },
282 { MCMEMBER_REC_FIELD(port_gid),
283 .offset_words = 4,
284 .offset_bits = 0,
285 .size_bits = 128 },
286 { MCMEMBER_REC_FIELD(qkey),
287 .offset_words = 8,
288 .offset_bits = 0,
289 .size_bits = 32 },
290 { MCMEMBER_REC_FIELD(mlid),
291 .offset_words = 9,
292 .offset_bits = 0,
293 .size_bits = 16 },
294 { MCMEMBER_REC_FIELD(mtu_selector),
295 .offset_words = 9,
296 .offset_bits = 16,
297 .size_bits = 2 },
298 { MCMEMBER_REC_FIELD(mtu),
299 .offset_words = 9,
300 .offset_bits = 18,
301 .size_bits = 6 },
302 { MCMEMBER_REC_FIELD(traffic_class),
303 .offset_words = 9,
304 .offset_bits = 24,
305 .size_bits = 8 },
306 { MCMEMBER_REC_FIELD(pkey),
307 .offset_words = 10,
308 .offset_bits = 0,
309 .size_bits = 16 },
310 { MCMEMBER_REC_FIELD(rate_selector),
311 .offset_words = 10,
312 .offset_bits = 16,
313 .size_bits = 2 },
314 { MCMEMBER_REC_FIELD(rate),
315 .offset_words = 10,
316 .offset_bits = 18,
317 .size_bits = 6 },
318 { MCMEMBER_REC_FIELD(packet_life_time_selector),
319 .offset_words = 10,
320 .offset_bits = 24,
321 .size_bits = 2 },
322 { MCMEMBER_REC_FIELD(packet_life_time),
323 .offset_words = 10,
324 .offset_bits = 26,
325 .size_bits = 6 },
326 { MCMEMBER_REC_FIELD(sl),
327 .offset_words = 11,
328 .offset_bits = 0,
329 .size_bits = 4 },
330 { MCMEMBER_REC_FIELD(flow_label),
331 .offset_words = 11,
332 .offset_bits = 4,
333 .size_bits = 20 },
334 { MCMEMBER_REC_FIELD(hop_limit),
335 .offset_words = 11,
336 .offset_bits = 24,
337 .size_bits = 8 },
338 { MCMEMBER_REC_FIELD(scope),
339 .offset_words = 12,
340 .offset_bits = 0,
341 .size_bits = 4 },
342 { MCMEMBER_REC_FIELD(join_state),
343 .offset_words = 12,
344 .offset_bits = 4,
345 .size_bits = 4 },
346 { MCMEMBER_REC_FIELD(proxy_join),
347 .offset_words = 12,
348 .offset_bits = 8,
349 .size_bits = 1 },
350 { RESERVED,
351 .offset_words = 12,
352 .offset_bits = 9,
353 .size_bits = 23 },
354 };
355
356 #define SERVICE_REC_FIELD(field) \
357 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
358 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
359 .field_name = "sa_service_rec:" #field
360
361 static const struct ib_field service_rec_table[] = {
362 { SERVICE_REC_FIELD(id),
363 .offset_words = 0,
364 .offset_bits = 0,
365 .size_bits = 64 },
366 { SERVICE_REC_FIELD(gid),
367 .offset_words = 2,
368 .offset_bits = 0,
369 .size_bits = 128 },
370 { SERVICE_REC_FIELD(pkey),
371 .offset_words = 6,
372 .offset_bits = 0,
373 .size_bits = 16 },
374 { SERVICE_REC_FIELD(lease),
375 .offset_words = 7,
376 .offset_bits = 0,
377 .size_bits = 32 },
378 { SERVICE_REC_FIELD(key),
379 .offset_words = 8,
380 .offset_bits = 0,
381 .size_bits = 128 },
382 { SERVICE_REC_FIELD(name),
383 .offset_words = 12,
384 .offset_bits = 0,
385 .size_bits = 64*8 },
386 { SERVICE_REC_FIELD(data8),
387 .offset_words = 28,
388 .offset_bits = 0,
389 .size_bits = 16*8 },
390 { SERVICE_REC_FIELD(data16),
391 .offset_words = 32,
392 .offset_bits = 0,
393 .size_bits = 8*16 },
394 { SERVICE_REC_FIELD(data32),
395 .offset_words = 36,
396 .offset_bits = 0,
397 .size_bits = 4*32 },
398 { SERVICE_REC_FIELD(data64),
399 .offset_words = 40,
400 .offset_bits = 0,
401 .size_bits = 2*64 },
402 };
403
404 #define CLASSPORTINFO_REC_FIELD(field) \
405 .struct_offset_bytes = offsetof(struct ib_class_port_info, field), \
406 .struct_size_bytes = sizeof((struct ib_class_port_info *)0)->field, \
407 .field_name = "ib_class_port_info:" #field
408
409 static const struct ib_field classport_info_rec_table[] = {
410 { CLASSPORTINFO_REC_FIELD(base_version),
411 .offset_words = 0,
412 .offset_bits = 0,
413 .size_bits = 8 },
414 { CLASSPORTINFO_REC_FIELD(class_version),
415 .offset_words = 0,
416 .offset_bits = 8,
417 .size_bits = 8 },
418 { CLASSPORTINFO_REC_FIELD(capability_mask),
419 .offset_words = 0,
420 .offset_bits = 16,
421 .size_bits = 16 },
422 { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
423 .offset_words = 1,
424 .offset_bits = 0,
425 .size_bits = 32 },
426 { CLASSPORTINFO_REC_FIELD(redirect_gid),
427 .offset_words = 2,
428 .offset_bits = 0,
429 .size_bits = 128 },
430 { CLASSPORTINFO_REC_FIELD(redirect_tcslfl),
431 .offset_words = 6,
432 .offset_bits = 0,
433 .size_bits = 32 },
434 { CLASSPORTINFO_REC_FIELD(redirect_lid),
435 .offset_words = 7,
436 .offset_bits = 0,
437 .size_bits = 16 },
438 { CLASSPORTINFO_REC_FIELD(redirect_pkey),
439 .offset_words = 7,
440 .offset_bits = 16,
441 .size_bits = 16 },
442
443 { CLASSPORTINFO_REC_FIELD(redirect_qp),
444 .offset_words = 8,
445 .offset_bits = 0,
446 .size_bits = 32 },
447 { CLASSPORTINFO_REC_FIELD(redirect_qkey),
448 .offset_words = 9,
449 .offset_bits = 0,
450 .size_bits = 32 },
451
452 { CLASSPORTINFO_REC_FIELD(trap_gid),
453 .offset_words = 10,
454 .offset_bits = 0,
455 .size_bits = 128 },
456 { CLASSPORTINFO_REC_FIELD(trap_tcslfl),
457 .offset_words = 14,
458 .offset_bits = 0,
459 .size_bits = 32 },
460
461 { CLASSPORTINFO_REC_FIELD(trap_lid),
462 .offset_words = 15,
463 .offset_bits = 0,
464 .size_bits = 16 },
465 { CLASSPORTINFO_REC_FIELD(trap_pkey),
466 .offset_words = 15,
467 .offset_bits = 16,
468 .size_bits = 16 },
469
470 { CLASSPORTINFO_REC_FIELD(trap_hlqp),
471 .offset_words = 16,
472 .offset_bits = 0,
473 .size_bits = 32 },
474 { CLASSPORTINFO_REC_FIELD(trap_qkey),
475 .offset_words = 17,
476 .offset_bits = 0,
477 .size_bits = 32 },
478 };
479
480 #define GUIDINFO_REC_FIELD(field) \
481 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \
482 .struct_size_bytes = sizeof((struct ib_sa_guidinfo_rec *) 0)->field, \
483 .field_name = "sa_guidinfo_rec:" #field
484
485 static const struct ib_field guidinfo_rec_table[] = {
486 { GUIDINFO_REC_FIELD(lid),
487 .offset_words = 0,
488 .offset_bits = 0,
489 .size_bits = 16 },
490 { GUIDINFO_REC_FIELD(block_num),
491 .offset_words = 0,
492 .offset_bits = 16,
493 .size_bits = 8 },
494 { GUIDINFO_REC_FIELD(res1),
495 .offset_words = 0,
496 .offset_bits = 24,
497 .size_bits = 8 },
498 { GUIDINFO_REC_FIELD(res2),
499 .offset_words = 1,
500 .offset_bits = 0,
501 .size_bits = 32 },
502 { GUIDINFO_REC_FIELD(guid_info_list),
503 .offset_words = 2,
504 .offset_bits = 0,
505 .size_bits = 512 },
506 };
507
508 static inline void ib_sa_disable_local_svc(struct ib_sa_query *query)
509 {
510 query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE;
511 }
512
513 static inline int ib_sa_query_cancelled(struct ib_sa_query *query)
514 {
515 return (query->flags & IB_SA_CANCEL);
516 }
517
518 static void ib_nl_set_path_rec_attrs(struct sk_buff *skb,
519 struct ib_sa_query *query)
520 {
521 struct ib_sa_path_rec *sa_rec = query->mad_buf->context[1];
522 struct ib_sa_mad *mad = query->mad_buf->mad;
523 ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask;
524 u16 val16;
525 u64 val64;
526 struct rdma_ls_resolve_header *header;
527
528 query->mad_buf->context[1] = NULL;
529
530 /* Construct the family header first */
531 header = (struct rdma_ls_resolve_header *)
532 skb_put(skb, NLMSG_ALIGN(sizeof(*header)));
533 memcpy(header->device_name, query->port->agent->device->name,
534 LS_DEVICE_NAME_MAX);
535 header->port_num = query->port->port_num;
536
537 if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) &&
538 sa_rec->reversible != 0)
539 query->path_use = LS_RESOLVE_PATH_USE_GMP;
540 else
541 query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL;
542 header->path_use = query->path_use;
543
544 /* Now build the attributes */
545 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) {
546 val64 = be64_to_cpu(sa_rec->service_id);
547 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID,
548 sizeof(val64), &val64);
549 }
550 if (comp_mask & IB_SA_PATH_REC_DGID)
551 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID,
552 sizeof(sa_rec->dgid), &sa_rec->dgid);
553 if (comp_mask & IB_SA_PATH_REC_SGID)
554 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID,
555 sizeof(sa_rec->sgid), &sa_rec->sgid);
556 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
557 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS,
558 sizeof(sa_rec->traffic_class), &sa_rec->traffic_class);
559
560 if (comp_mask & IB_SA_PATH_REC_PKEY) {
561 val16 = be16_to_cpu(sa_rec->pkey);
562 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY,
563 sizeof(val16), &val16);
564 }
565 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) {
566 val16 = be16_to_cpu(sa_rec->qos_class);
567 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS,
568 sizeof(val16), &val16);
569 }
570 }
571
572 static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask)
573 {
574 int len = 0;
575
576 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID)
577 len += nla_total_size(sizeof(u64));
578 if (comp_mask & IB_SA_PATH_REC_DGID)
579 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
580 if (comp_mask & IB_SA_PATH_REC_SGID)
581 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
582 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
583 len += nla_total_size(sizeof(u8));
584 if (comp_mask & IB_SA_PATH_REC_PKEY)
585 len += nla_total_size(sizeof(u16));
586 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS)
587 len += nla_total_size(sizeof(u16));
588
589 /*
590 * Make sure that at least some of the required comp_mask bits are
591 * set.
592 */
593 if (WARN_ON(len == 0))
594 return len;
595
596 /* Add the family header */
597 len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header));
598
599 return len;
600 }
601
602 static int ib_nl_send_msg(struct ib_sa_query *query, gfp_t gfp_mask)
603 {
604 struct sk_buff *skb = NULL;
605 struct nlmsghdr *nlh;
606 void *data;
607 int ret = 0;
608 struct ib_sa_mad *mad;
609 int len;
610
611 mad = query->mad_buf->mad;
612 len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask);
613 if (len <= 0)
614 return -EMSGSIZE;
615
616 skb = nlmsg_new(len, gfp_mask);
617 if (!skb)
618 return -ENOMEM;
619
620 /* Put nlmsg header only for now */
621 data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS,
622 RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST);
623 if (!data) {
624 nlmsg_free(skb);
625 return -EMSGSIZE;
626 }
627
628 /* Add attributes */
629 ib_nl_set_path_rec_attrs(skb, query);
630
631 /* Repair the nlmsg header length */
632 nlmsg_end(skb, nlh);
633
634 ret = ibnl_multicast(skb, nlh, RDMA_NL_GROUP_LS, gfp_mask);
635 if (!ret)
636 ret = len;
637 else
638 ret = 0;
639
640 return ret;
641 }
642
643 static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
644 {
645 unsigned long flags;
646 unsigned long delay;
647 int ret;
648
649 INIT_LIST_HEAD(&query->list);
650 query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq);
651
652 /* Put the request on the list first.*/
653 spin_lock_irqsave(&ib_nl_request_lock, flags);
654 delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
655 query->timeout = delay + jiffies;
656 list_add_tail(&query->list, &ib_nl_request_list);
657 /* Start the timeout if this is the only request */
658 if (ib_nl_request_list.next == &query->list)
659 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
660 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
661
662 ret = ib_nl_send_msg(query, gfp_mask);
663 if (ret <= 0) {
664 ret = -EIO;
665 /* Remove the request */
666 spin_lock_irqsave(&ib_nl_request_lock, flags);
667 list_del(&query->list);
668 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
669 } else {
670 ret = 0;
671 }
672
673 return ret;
674 }
675
676 static int ib_nl_cancel_request(struct ib_sa_query *query)
677 {
678 unsigned long flags;
679 struct ib_sa_query *wait_query;
680 int found = 0;
681
682 spin_lock_irqsave(&ib_nl_request_lock, flags);
683 list_for_each_entry(wait_query, &ib_nl_request_list, list) {
684 /* Let the timeout to take care of the callback */
685 if (query == wait_query) {
686 query->flags |= IB_SA_CANCEL;
687 query->timeout = jiffies;
688 list_move(&query->list, &ib_nl_request_list);
689 found = 1;
690 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1);
691 break;
692 }
693 }
694 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
695
696 return found;
697 }
698
699 static void send_handler(struct ib_mad_agent *agent,
700 struct ib_mad_send_wc *mad_send_wc);
701
702 static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
703 const struct nlmsghdr *nlh)
704 {
705 struct ib_mad_send_wc mad_send_wc;
706 struct ib_sa_mad *mad = NULL;
707 const struct nlattr *head, *curr;
708 struct ib_path_rec_data *rec;
709 int len, rem;
710 u32 mask = 0;
711 int status = -EIO;
712
713 if (query->callback) {
714 head = (const struct nlattr *) nlmsg_data(nlh);
715 len = nlmsg_len(nlh);
716 switch (query->path_use) {
717 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL:
718 mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND;
719 break;
720
721 case LS_RESOLVE_PATH_USE_ALL:
722 case LS_RESOLVE_PATH_USE_GMP:
723 default:
724 mask = IB_PATH_PRIMARY | IB_PATH_GMP |
725 IB_PATH_BIDIRECTIONAL;
726 break;
727 }
728 nla_for_each_attr(curr, head, len, rem) {
729 if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
730 rec = nla_data(curr);
731 /*
732 * Get the first one. In the future, we may
733 * need to get up to 6 pathrecords.
734 */
735 if ((rec->flags & mask) == mask) {
736 mad = query->mad_buf->mad;
737 mad->mad_hdr.method |=
738 IB_MGMT_METHOD_RESP;
739 memcpy(mad->data, rec->path_rec,
740 sizeof(rec->path_rec));
741 status = 0;
742 break;
743 }
744 }
745 }
746 query->callback(query, status, mad);
747 }
748
749 mad_send_wc.send_buf = query->mad_buf;
750 mad_send_wc.status = IB_WC_SUCCESS;
751 send_handler(query->mad_buf->mad_agent, &mad_send_wc);
752 }
753
754 static void ib_nl_request_timeout(struct work_struct *work)
755 {
756 unsigned long flags;
757 struct ib_sa_query *query;
758 unsigned long delay;
759 struct ib_mad_send_wc mad_send_wc;
760 int ret;
761
762 spin_lock_irqsave(&ib_nl_request_lock, flags);
763 while (!list_empty(&ib_nl_request_list)) {
764 query = list_entry(ib_nl_request_list.next,
765 struct ib_sa_query, list);
766
767 if (time_after(query->timeout, jiffies)) {
768 delay = query->timeout - jiffies;
769 if ((long)delay <= 0)
770 delay = 1;
771 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
772 break;
773 }
774
775 list_del(&query->list);
776 ib_sa_disable_local_svc(query);
777 /* Hold the lock to protect against query cancellation */
778 if (ib_sa_query_cancelled(query))
779 ret = -1;
780 else
781 ret = ib_post_send_mad(query->mad_buf, NULL);
782 if (ret) {
783 mad_send_wc.send_buf = query->mad_buf;
784 mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
785 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
786 send_handler(query->port->agent, &mad_send_wc);
787 spin_lock_irqsave(&ib_nl_request_lock, flags);
788 }
789 }
790 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
791 }
792
793 int ib_nl_handle_set_timeout(struct sk_buff *skb,
794 struct netlink_callback *cb)
795 {
796 const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh;
797 int timeout, delta, abs_delta;
798 const struct nlattr *attr;
799 unsigned long flags;
800 struct ib_sa_query *query;
801 long delay = 0;
802 struct nlattr *tb[LS_NLA_TYPE_MAX];
803 int ret;
804
805 if (!(nlh->nlmsg_flags & NLM_F_REQUEST) ||
806 !(NETLINK_CB(skb).sk) ||
807 !netlink_capable(skb, CAP_NET_ADMIN))
808 return -EPERM;
809
810 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
811 nlmsg_len(nlh), ib_nl_policy);
812 attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT];
813 if (ret || !attr)
814 goto settimeout_out;
815
816 timeout = *(int *) nla_data(attr);
817 if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN)
818 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN;
819 if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX)
820 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX;
821
822 delta = timeout - sa_local_svc_timeout_ms;
823 if (delta < 0)
824 abs_delta = -delta;
825 else
826 abs_delta = delta;
827
828 if (delta != 0) {
829 spin_lock_irqsave(&ib_nl_request_lock, flags);
830 sa_local_svc_timeout_ms = timeout;
831 list_for_each_entry(query, &ib_nl_request_list, list) {
832 if (delta < 0 && abs_delta > query->timeout)
833 query->timeout = 0;
834 else
835 query->timeout += delta;
836
837 /* Get the new delay from the first entry */
838 if (!delay) {
839 delay = query->timeout - jiffies;
840 if (delay <= 0)
841 delay = 1;
842 }
843 }
844 if (delay)
845 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work,
846 (unsigned long)delay);
847 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
848 }
849
850 settimeout_out:
851 return skb->len;
852 }
853
854 static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh)
855 {
856 struct nlattr *tb[LS_NLA_TYPE_MAX];
857 int ret;
858
859 if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR)
860 return 0;
861
862 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
863 nlmsg_len(nlh), ib_nl_policy);
864 if (ret)
865 return 0;
866
867 return 1;
868 }
869
870 int ib_nl_handle_resolve_resp(struct sk_buff *skb,
871 struct netlink_callback *cb)
872 {
873 const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh;
874 unsigned long flags;
875 struct ib_sa_query *query;
876 struct ib_mad_send_buf *send_buf;
877 struct ib_mad_send_wc mad_send_wc;
878 int found = 0;
879 int ret;
880
881 if ((nlh->nlmsg_flags & NLM_F_REQUEST) ||
882 !(NETLINK_CB(skb).sk) ||
883 !netlink_capable(skb, CAP_NET_ADMIN))
884 return -EPERM;
885
886 spin_lock_irqsave(&ib_nl_request_lock, flags);
887 list_for_each_entry(query, &ib_nl_request_list, list) {
888 /*
889 * If the query is cancelled, let the timeout routine
890 * take care of it.
891 */
892 if (nlh->nlmsg_seq == query->seq) {
893 found = !ib_sa_query_cancelled(query);
894 if (found)
895 list_del(&query->list);
896 break;
897 }
898 }
899
900 if (!found) {
901 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
902 goto resp_out;
903 }
904
905 send_buf = query->mad_buf;
906
907 if (!ib_nl_is_good_resolve_resp(nlh)) {
908 /* if the result is a failure, send out the packet via IB */
909 ib_sa_disable_local_svc(query);
910 ret = ib_post_send_mad(query->mad_buf, NULL);
911 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
912 if (ret) {
913 mad_send_wc.send_buf = send_buf;
914 mad_send_wc.status = IB_WC_GENERAL_ERR;
915 send_handler(query->port->agent, &mad_send_wc);
916 }
917 } else {
918 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
919 ib_nl_process_good_resolve_rsp(query, nlh);
920 }
921
922 resp_out:
923 return skb->len;
924 }
925
926 static void free_sm_ah(struct kref *kref)
927 {
928 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
929
930 ib_destroy_ah(sm_ah->ah);
931 kfree(sm_ah);
932 }
933
934 static void update_sm_ah(struct work_struct *work)
935 {
936 struct ib_sa_port *port =
937 container_of(work, struct ib_sa_port, update_task);
938 struct ib_sa_sm_ah *new_ah;
939 struct ib_port_attr port_attr;
940 struct ib_ah_attr ah_attr;
941
942 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
943 pr_warn("Couldn't query port\n");
944 return;
945 }
946
947 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
948 if (!new_ah) {
949 return;
950 }
951
952 kref_init(&new_ah->ref);
953 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
954
955 new_ah->pkey_index = 0;
956 if (ib_find_pkey(port->agent->device, port->port_num,
957 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
958 pr_err("Couldn't find index for default PKey\n");
959
960 memset(&ah_attr, 0, sizeof ah_attr);
961 ah_attr.dlid = port_attr.sm_lid;
962 ah_attr.sl = port_attr.sm_sl;
963 ah_attr.port_num = port->port_num;
964 if (port_attr.grh_required) {
965 ah_attr.ah_flags = IB_AH_GRH;
966 ah_attr.grh.dgid.global.subnet_prefix = cpu_to_be64(port_attr.subnet_prefix);
967 ah_attr.grh.dgid.global.interface_id = cpu_to_be64(IB_SA_WELL_KNOWN_GUID);
968 }
969
970 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
971 if (IS_ERR(new_ah->ah)) {
972 pr_warn("Couldn't create new SM AH\n");
973 kfree(new_ah);
974 return;
975 }
976
977 spin_lock_irq(&port->ah_lock);
978 if (port->sm_ah)
979 kref_put(&port->sm_ah->ref, free_sm_ah);
980 port->sm_ah = new_ah;
981 spin_unlock_irq(&port->ah_lock);
982
983 }
984
985 static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
986 {
987 if (event->event == IB_EVENT_PORT_ERR ||
988 event->event == IB_EVENT_PORT_ACTIVE ||
989 event->event == IB_EVENT_LID_CHANGE ||
990 event->event == IB_EVENT_PKEY_CHANGE ||
991 event->event == IB_EVENT_SM_CHANGE ||
992 event->event == IB_EVENT_CLIENT_REREGISTER) {
993 unsigned long flags;
994 struct ib_sa_device *sa_dev =
995 container_of(handler, typeof(*sa_dev), event_handler);
996 struct ib_sa_port *port =
997 &sa_dev->port[event->element.port_num - sa_dev->start_port];
998
999 if (!rdma_cap_ib_sa(handler->device, port->port_num))
1000 return;
1001
1002 spin_lock_irqsave(&port->ah_lock, flags);
1003 if (port->sm_ah)
1004 kref_put(&port->sm_ah->ref, free_sm_ah);
1005 port->sm_ah = NULL;
1006 spin_unlock_irqrestore(&port->ah_lock, flags);
1007
1008 if (event->event == IB_EVENT_SM_CHANGE ||
1009 event->event == IB_EVENT_CLIENT_REREGISTER ||
1010 event->event == IB_EVENT_LID_CHANGE) {
1011 spin_lock_irqsave(&port->classport_lock, flags);
1012 port->classport_info.valid = false;
1013 spin_unlock_irqrestore(&port->classport_lock, flags);
1014 }
1015 queue_work(ib_wq, &sa_dev->port[event->element.port_num -
1016 sa_dev->start_port].update_task);
1017 }
1018 }
1019
1020 void ib_sa_register_client(struct ib_sa_client *client)
1021 {
1022 atomic_set(&client->users, 1);
1023 init_completion(&client->comp);
1024 }
1025 EXPORT_SYMBOL(ib_sa_register_client);
1026
1027 void ib_sa_unregister_client(struct ib_sa_client *client)
1028 {
1029 ib_sa_client_put(client);
1030 wait_for_completion(&client->comp);
1031 }
1032 EXPORT_SYMBOL(ib_sa_unregister_client);
1033
1034 /**
1035 * ib_sa_cancel_query - try to cancel an SA query
1036 * @id:ID of query to cancel
1037 * @query:query pointer to cancel
1038 *
1039 * Try to cancel an SA query. If the id and query don't match up or
1040 * the query has already completed, nothing is done. Otherwise the
1041 * query is canceled and will complete with a status of -EINTR.
1042 */
1043 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
1044 {
1045 unsigned long flags;
1046 struct ib_mad_agent *agent;
1047 struct ib_mad_send_buf *mad_buf;
1048
1049 spin_lock_irqsave(&idr_lock, flags);
1050 if (idr_find(&query_idr, id) != query) {
1051 spin_unlock_irqrestore(&idr_lock, flags);
1052 return;
1053 }
1054 agent = query->port->agent;
1055 mad_buf = query->mad_buf;
1056 spin_unlock_irqrestore(&idr_lock, flags);
1057
1058 /*
1059 * If the query is still on the netlink request list, schedule
1060 * it to be cancelled by the timeout routine. Otherwise, it has been
1061 * sent to the MAD layer and has to be cancelled from there.
1062 */
1063 if (!ib_nl_cancel_request(query))
1064 ib_cancel_mad(agent, mad_buf);
1065 }
1066 EXPORT_SYMBOL(ib_sa_cancel_query);
1067
1068 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
1069 {
1070 struct ib_sa_device *sa_dev;
1071 struct ib_sa_port *port;
1072 unsigned long flags;
1073 u8 src_path_mask;
1074
1075 sa_dev = ib_get_client_data(device, &sa_client);
1076 if (!sa_dev)
1077 return 0x7f;
1078
1079 port = &sa_dev->port[port_num - sa_dev->start_port];
1080 spin_lock_irqsave(&port->ah_lock, flags);
1081 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
1082 spin_unlock_irqrestore(&port->ah_lock, flags);
1083
1084 return src_path_mask;
1085 }
1086
1087 int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
1088 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)
1089 {
1090 int ret;
1091 u16 gid_index;
1092 int use_roce;
1093 struct net_device *ndev = NULL;
1094
1095 memset(ah_attr, 0, sizeof *ah_attr);
1096 ah_attr->dlid = be16_to_cpu(rec->dlid);
1097 ah_attr->sl = rec->sl;
1098 ah_attr->src_path_bits = be16_to_cpu(rec->slid) &
1099 get_src_path_mask(device, port_num);
1100 ah_attr->port_num = port_num;
1101 ah_attr->static_rate = rec->rate;
1102
1103 use_roce = rdma_cap_eth_ah(device, port_num);
1104
1105 if (use_roce) {
1106 struct net_device *idev;
1107 struct net_device *resolved_dev;
1108 struct rdma_dev_addr dev_addr = {.bound_dev_if = rec->ifindex,
1109 .net = rec->net ? rec->net :
1110 &init_net};
1111 union {
1112 struct sockaddr _sockaddr;
1113 struct sockaddr_in _sockaddr_in;
1114 struct sockaddr_in6 _sockaddr_in6;
1115 } sgid_addr, dgid_addr;
1116
1117 if (!device->get_netdev)
1118 return -EOPNOTSUPP;
1119
1120 rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid);
1121 rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid);
1122
1123 /* validate the route */
1124 ret = rdma_resolve_ip_route(&sgid_addr._sockaddr,
1125 &dgid_addr._sockaddr, &dev_addr);
1126 if (ret)
1127 return ret;
1128
1129 if ((dev_addr.network == RDMA_NETWORK_IPV4 ||
1130 dev_addr.network == RDMA_NETWORK_IPV6) &&
1131 rec->gid_type != IB_GID_TYPE_ROCE_UDP_ENCAP)
1132 return -EINVAL;
1133
1134 idev = device->get_netdev(device, port_num);
1135 if (!idev)
1136 return -ENODEV;
1137
1138 resolved_dev = dev_get_by_index(dev_addr.net,
1139 dev_addr.bound_dev_if);
1140 if (resolved_dev->flags & IFF_LOOPBACK) {
1141 dev_put(resolved_dev);
1142 resolved_dev = idev;
1143 dev_hold(resolved_dev);
1144 }
1145 ndev = ib_get_ndev_from_path(rec);
1146 rcu_read_lock();
1147 if ((ndev && ndev != resolved_dev) ||
1148 (resolved_dev != idev &&
1149 !rdma_is_upper_dev_rcu(idev, resolved_dev)))
1150 ret = -EHOSTUNREACH;
1151 rcu_read_unlock();
1152 dev_put(idev);
1153 dev_put(resolved_dev);
1154 if (ret) {
1155 if (ndev)
1156 dev_put(ndev);
1157 return ret;
1158 }
1159 }
1160
1161 if (rec->hop_limit > 0 || use_roce) {
1162 ah_attr->ah_flags = IB_AH_GRH;
1163 ah_attr->grh.dgid = rec->dgid;
1164
1165 ret = ib_find_cached_gid_by_port(device, &rec->sgid,
1166 rec->gid_type, port_num, ndev,
1167 &gid_index);
1168 if (ret) {
1169 if (ndev)
1170 dev_put(ndev);
1171 return ret;
1172 }
1173
1174 ah_attr->grh.sgid_index = gid_index;
1175 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label);
1176 ah_attr->grh.hop_limit = rec->hop_limit;
1177 ah_attr->grh.traffic_class = rec->traffic_class;
1178 if (ndev)
1179 dev_put(ndev);
1180 }
1181
1182 if (use_roce)
1183 memcpy(ah_attr->dmac, rec->dmac, ETH_ALEN);
1184
1185 return 0;
1186 }
1187 EXPORT_SYMBOL(ib_init_ah_from_path);
1188
1189 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1190 {
1191 unsigned long flags;
1192
1193 spin_lock_irqsave(&query->port->ah_lock, flags);
1194 if (!query->port->sm_ah) {
1195 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1196 return -EAGAIN;
1197 }
1198 kref_get(&query->port->sm_ah->ref);
1199 query->sm_ah = query->port->sm_ah;
1200 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1201
1202 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1203 query->sm_ah->pkey_index,
1204 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
1205 gfp_mask,
1206 IB_MGMT_BASE_VERSION);
1207 if (IS_ERR(query->mad_buf)) {
1208 kref_put(&query->sm_ah->ref, free_sm_ah);
1209 return -ENOMEM;
1210 }
1211
1212 query->mad_buf->ah = query->sm_ah->ah;
1213
1214 return 0;
1215 }
1216
1217 static void free_mad(struct ib_sa_query *query)
1218 {
1219 ib_free_send_mad(query->mad_buf);
1220 kref_put(&query->sm_ah->ref, free_sm_ah);
1221 }
1222
1223 static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
1224 {
1225 unsigned long flags;
1226
1227 memset(mad, 0, sizeof *mad);
1228
1229 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
1230 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
1231 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1232
1233 spin_lock_irqsave(&tid_lock, flags);
1234 mad->mad_hdr.tid =
1235 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1236 spin_unlock_irqrestore(&tid_lock, flags);
1237 }
1238
1239 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
1240 {
1241 bool preload = gfpflags_allow_blocking(gfp_mask);
1242 unsigned long flags;
1243 int ret, id;
1244
1245 if (preload)
1246 idr_preload(gfp_mask);
1247 spin_lock_irqsave(&idr_lock, flags);
1248
1249 id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
1250
1251 spin_unlock_irqrestore(&idr_lock, flags);
1252 if (preload)
1253 idr_preload_end();
1254 if (id < 0)
1255 return id;
1256
1257 query->mad_buf->timeout_ms = timeout_ms;
1258 query->mad_buf->context[0] = query;
1259 query->id = id;
1260
1261 if (query->flags & IB_SA_ENABLE_LOCAL_SERVICE) {
1262 if (!ibnl_chk_listeners(RDMA_NL_GROUP_LS)) {
1263 if (!ib_nl_make_request(query, gfp_mask))
1264 return id;
1265 }
1266 ib_sa_disable_local_svc(query);
1267 }
1268
1269 ret = ib_post_send_mad(query->mad_buf, NULL);
1270 if (ret) {
1271 spin_lock_irqsave(&idr_lock, flags);
1272 idr_remove(&query_idr, id);
1273 spin_unlock_irqrestore(&idr_lock, flags);
1274 }
1275
1276 /*
1277 * It's not safe to dereference query any more, because the
1278 * send may already have completed and freed the query in
1279 * another context.
1280 */
1281 return ret ? ret : id;
1282 }
1283
1284 void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec)
1285 {
1286 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1287 }
1288 EXPORT_SYMBOL(ib_sa_unpack_path);
1289
1290 void ib_sa_pack_path(struct ib_sa_path_rec *rec, void *attribute)
1291 {
1292 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1293 }
1294 EXPORT_SYMBOL(ib_sa_pack_path);
1295
1296 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1297 int status,
1298 struct ib_sa_mad *mad)
1299 {
1300 struct ib_sa_path_query *query =
1301 container_of(sa_query, struct ib_sa_path_query, sa_query);
1302
1303 if (mad) {
1304 struct ib_sa_path_rec rec;
1305
1306 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
1307 mad->data, &rec);
1308 rec.net = NULL;
1309 rec.ifindex = 0;
1310 rec.gid_type = IB_GID_TYPE_IB;
1311 eth_zero_addr(rec.dmac);
1312 query->callback(status, &rec, query->context);
1313 } else
1314 query->callback(status, NULL, query->context);
1315 }
1316
1317 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1318 {
1319 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
1320 }
1321
1322 /**
1323 * ib_sa_path_rec_get - Start a Path get query
1324 * @client:SA client
1325 * @device:device to send query on
1326 * @port_num: port number to send query on
1327 * @rec:Path Record to send in query
1328 * @comp_mask:component mask to send in query
1329 * @timeout_ms:time to wait for response
1330 * @gfp_mask:GFP mask to use for internal allocations
1331 * @callback:function called when query completes, times out or is
1332 * canceled
1333 * @context:opaque user context passed to callback
1334 * @sa_query:query context, used to cancel query
1335 *
1336 * Send a Path Record Get query to the SA to look up a path. The
1337 * callback function will be called when the query completes (or
1338 * fails); status is 0 for a successful response, -EINTR if the query
1339 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1340 * occurred sending the query. The resp parameter of the callback is
1341 * only valid if status is 0.
1342 *
1343 * If the return value of ib_sa_path_rec_get() is negative, it is an
1344 * error code. Otherwise it is a query ID that can be used to cancel
1345 * the query.
1346 */
1347 int ib_sa_path_rec_get(struct ib_sa_client *client,
1348 struct ib_device *device, u8 port_num,
1349 struct ib_sa_path_rec *rec,
1350 ib_sa_comp_mask comp_mask,
1351 int timeout_ms, gfp_t gfp_mask,
1352 void (*callback)(int status,
1353 struct ib_sa_path_rec *resp,
1354 void *context),
1355 void *context,
1356 struct ib_sa_query **sa_query)
1357 {
1358 struct ib_sa_path_query *query;
1359 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1360 struct ib_sa_port *port;
1361 struct ib_mad_agent *agent;
1362 struct ib_sa_mad *mad;
1363 int ret;
1364
1365 if (!sa_dev)
1366 return -ENODEV;
1367
1368 port = &sa_dev->port[port_num - sa_dev->start_port];
1369 agent = port->agent;
1370
1371 query = kzalloc(sizeof(*query), gfp_mask);
1372 if (!query)
1373 return -ENOMEM;
1374
1375 query->sa_query.port = port;
1376 ret = alloc_mad(&query->sa_query, gfp_mask);
1377 if (ret)
1378 goto err1;
1379
1380 ib_sa_client_get(client);
1381 query->sa_query.client = client;
1382 query->callback = callback;
1383 query->context = context;
1384
1385 mad = query->sa_query.mad_buf->mad;
1386 init_mad(mad, agent);
1387
1388 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1389 query->sa_query.release = ib_sa_path_rec_release;
1390 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1391 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1392 mad->sa_hdr.comp_mask = comp_mask;
1393
1394 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
1395
1396 *sa_query = &query->sa_query;
1397
1398 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1399 query->sa_query.mad_buf->context[1] = rec;
1400
1401 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1402 if (ret < 0)
1403 goto err2;
1404
1405 return ret;
1406
1407 err2:
1408 *sa_query = NULL;
1409 ib_sa_client_put(query->sa_query.client);
1410 free_mad(&query->sa_query);
1411
1412 err1:
1413 kfree(query);
1414 return ret;
1415 }
1416 EXPORT_SYMBOL(ib_sa_path_rec_get);
1417
1418 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1419 int status,
1420 struct ib_sa_mad *mad)
1421 {
1422 struct ib_sa_service_query *query =
1423 container_of(sa_query, struct ib_sa_service_query, sa_query);
1424
1425 if (mad) {
1426 struct ib_sa_service_rec rec;
1427
1428 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1429 mad->data, &rec);
1430 query->callback(status, &rec, query->context);
1431 } else
1432 query->callback(status, NULL, query->context);
1433 }
1434
1435 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1436 {
1437 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1438 }
1439
1440 /**
1441 * ib_sa_service_rec_query - Start Service Record operation
1442 * @client:SA client
1443 * @device:device to send request on
1444 * @port_num: port number to send request on
1445 * @method:SA method - should be get, set, or delete
1446 * @rec:Service Record to send in request
1447 * @comp_mask:component mask to send in request
1448 * @timeout_ms:time to wait for response
1449 * @gfp_mask:GFP mask to use for internal allocations
1450 * @callback:function called when request completes, times out or is
1451 * canceled
1452 * @context:opaque user context passed to callback
1453 * @sa_query:request context, used to cancel request
1454 *
1455 * Send a Service Record set/get/delete to the SA to register,
1456 * unregister or query a service record.
1457 * The callback function will be called when the request completes (or
1458 * fails); status is 0 for a successful response, -EINTR if the query
1459 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1460 * occurred sending the query. The resp parameter of the callback is
1461 * only valid if status is 0.
1462 *
1463 * If the return value of ib_sa_service_rec_query() is negative, it is an
1464 * error code. Otherwise it is a request ID that can be used to cancel
1465 * the query.
1466 */
1467 int ib_sa_service_rec_query(struct ib_sa_client *client,
1468 struct ib_device *device, u8 port_num, u8 method,
1469 struct ib_sa_service_rec *rec,
1470 ib_sa_comp_mask comp_mask,
1471 int timeout_ms, gfp_t gfp_mask,
1472 void (*callback)(int status,
1473 struct ib_sa_service_rec *resp,
1474 void *context),
1475 void *context,
1476 struct ib_sa_query **sa_query)
1477 {
1478 struct ib_sa_service_query *query;
1479 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1480 struct ib_sa_port *port;
1481 struct ib_mad_agent *agent;
1482 struct ib_sa_mad *mad;
1483 int ret;
1484
1485 if (!sa_dev)
1486 return -ENODEV;
1487
1488 port = &sa_dev->port[port_num - sa_dev->start_port];
1489 agent = port->agent;
1490
1491 if (method != IB_MGMT_METHOD_GET &&
1492 method != IB_MGMT_METHOD_SET &&
1493 method != IB_SA_METHOD_DELETE)
1494 return -EINVAL;
1495
1496 query = kzalloc(sizeof(*query), gfp_mask);
1497 if (!query)
1498 return -ENOMEM;
1499
1500 query->sa_query.port = port;
1501 ret = alloc_mad(&query->sa_query, gfp_mask);
1502 if (ret)
1503 goto err1;
1504
1505 ib_sa_client_get(client);
1506 query->sa_query.client = client;
1507 query->callback = callback;
1508 query->context = context;
1509
1510 mad = query->sa_query.mad_buf->mad;
1511 init_mad(mad, agent);
1512
1513 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1514 query->sa_query.release = ib_sa_service_rec_release;
1515 mad->mad_hdr.method = method;
1516 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1517 mad->sa_hdr.comp_mask = comp_mask;
1518
1519 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
1520 rec, mad->data);
1521
1522 *sa_query = &query->sa_query;
1523
1524 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1525 if (ret < 0)
1526 goto err2;
1527
1528 return ret;
1529
1530 err2:
1531 *sa_query = NULL;
1532 ib_sa_client_put(query->sa_query.client);
1533 free_mad(&query->sa_query);
1534
1535 err1:
1536 kfree(query);
1537 return ret;
1538 }
1539 EXPORT_SYMBOL(ib_sa_service_rec_query);
1540
1541 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1542 int status,
1543 struct ib_sa_mad *mad)
1544 {
1545 struct ib_sa_mcmember_query *query =
1546 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1547
1548 if (mad) {
1549 struct ib_sa_mcmember_rec rec;
1550
1551 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1552 mad->data, &rec);
1553 query->callback(status, &rec, query->context);
1554 } else
1555 query->callback(status, NULL, query->context);
1556 }
1557
1558 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1559 {
1560 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1561 }
1562
1563 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1564 struct ib_device *device, u8 port_num,
1565 u8 method,
1566 struct ib_sa_mcmember_rec *rec,
1567 ib_sa_comp_mask comp_mask,
1568 int timeout_ms, gfp_t gfp_mask,
1569 void (*callback)(int status,
1570 struct ib_sa_mcmember_rec *resp,
1571 void *context),
1572 void *context,
1573 struct ib_sa_query **sa_query)
1574 {
1575 struct ib_sa_mcmember_query *query;
1576 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1577 struct ib_sa_port *port;
1578 struct ib_mad_agent *agent;
1579 struct ib_sa_mad *mad;
1580 int ret;
1581
1582 if (!sa_dev)
1583 return -ENODEV;
1584
1585 port = &sa_dev->port[port_num - sa_dev->start_port];
1586 agent = port->agent;
1587
1588 query = kzalloc(sizeof(*query), gfp_mask);
1589 if (!query)
1590 return -ENOMEM;
1591
1592 query->sa_query.port = port;
1593 ret = alloc_mad(&query->sa_query, gfp_mask);
1594 if (ret)
1595 goto err1;
1596
1597 ib_sa_client_get(client);
1598 query->sa_query.client = client;
1599 query->callback = callback;
1600 query->context = context;
1601
1602 mad = query->sa_query.mad_buf->mad;
1603 init_mad(mad, agent);
1604
1605 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1606 query->sa_query.release = ib_sa_mcmember_rec_release;
1607 mad->mad_hdr.method = method;
1608 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1609 mad->sa_hdr.comp_mask = comp_mask;
1610
1611 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1612 rec, mad->data);
1613
1614 *sa_query = &query->sa_query;
1615
1616 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1617 if (ret < 0)
1618 goto err2;
1619
1620 return ret;
1621
1622 err2:
1623 *sa_query = NULL;
1624 ib_sa_client_put(query->sa_query.client);
1625 free_mad(&query->sa_query);
1626
1627 err1:
1628 kfree(query);
1629 return ret;
1630 }
1631
1632 /* Support GuidInfoRecord */
1633 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1634 int status,
1635 struct ib_sa_mad *mad)
1636 {
1637 struct ib_sa_guidinfo_query *query =
1638 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1639
1640 if (mad) {
1641 struct ib_sa_guidinfo_rec rec;
1642
1643 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1644 mad->data, &rec);
1645 query->callback(status, &rec, query->context);
1646 } else
1647 query->callback(status, NULL, query->context);
1648 }
1649
1650 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1651 {
1652 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1653 }
1654
1655 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1656 struct ib_device *device, u8 port_num,
1657 struct ib_sa_guidinfo_rec *rec,
1658 ib_sa_comp_mask comp_mask, u8 method,
1659 int timeout_ms, gfp_t gfp_mask,
1660 void (*callback)(int status,
1661 struct ib_sa_guidinfo_rec *resp,
1662 void *context),
1663 void *context,
1664 struct ib_sa_query **sa_query)
1665 {
1666 struct ib_sa_guidinfo_query *query;
1667 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1668 struct ib_sa_port *port;
1669 struct ib_mad_agent *agent;
1670 struct ib_sa_mad *mad;
1671 int ret;
1672
1673 if (!sa_dev)
1674 return -ENODEV;
1675
1676 if (method != IB_MGMT_METHOD_GET &&
1677 method != IB_MGMT_METHOD_SET &&
1678 method != IB_SA_METHOD_DELETE) {
1679 return -EINVAL;
1680 }
1681
1682 port = &sa_dev->port[port_num - sa_dev->start_port];
1683 agent = port->agent;
1684
1685 query = kzalloc(sizeof(*query), gfp_mask);
1686 if (!query)
1687 return -ENOMEM;
1688
1689 query->sa_query.port = port;
1690 ret = alloc_mad(&query->sa_query, gfp_mask);
1691 if (ret)
1692 goto err1;
1693
1694 ib_sa_client_get(client);
1695 query->sa_query.client = client;
1696 query->callback = callback;
1697 query->context = context;
1698
1699 mad = query->sa_query.mad_buf->mad;
1700 init_mad(mad, agent);
1701
1702 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1703 query->sa_query.release = ib_sa_guidinfo_rec_release;
1704
1705 mad->mad_hdr.method = method;
1706 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1707 mad->sa_hdr.comp_mask = comp_mask;
1708
1709 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1710 mad->data);
1711
1712 *sa_query = &query->sa_query;
1713
1714 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1715 if (ret < 0)
1716 goto err2;
1717
1718 return ret;
1719
1720 err2:
1721 *sa_query = NULL;
1722 ib_sa_client_put(query->sa_query.client);
1723 free_mad(&query->sa_query);
1724
1725 err1:
1726 kfree(query);
1727 return ret;
1728 }
1729 EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
1730
1731 /* Support get SA ClassPortInfo */
1732 static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
1733 int status,
1734 struct ib_sa_mad *mad)
1735 {
1736 unsigned long flags;
1737 struct ib_sa_classport_info_query *query =
1738 container_of(sa_query, struct ib_sa_classport_info_query, sa_query);
1739
1740 if (mad) {
1741 struct ib_class_port_info rec;
1742
1743 ib_unpack(classport_info_rec_table,
1744 ARRAY_SIZE(classport_info_rec_table),
1745 mad->data, &rec);
1746
1747 spin_lock_irqsave(&sa_query->port->classport_lock, flags);
1748 if (!status && !sa_query->port->classport_info.valid) {
1749 memcpy(&sa_query->port->classport_info.data, &rec,
1750 sizeof(sa_query->port->classport_info.data));
1751
1752 sa_query->port->classport_info.valid = true;
1753 }
1754 spin_unlock_irqrestore(&sa_query->port->classport_lock, flags);
1755
1756 query->callback(status, &rec, query->context);
1757 } else {
1758 query->callback(status, NULL, query->context);
1759 }
1760 }
1761
1762 static void ib_sa_portclass_info_rec_release(struct ib_sa_query *sa_query)
1763 {
1764 kfree(container_of(sa_query, struct ib_sa_classport_info_query,
1765 sa_query));
1766 }
1767
1768 int ib_sa_classport_info_rec_query(struct ib_sa_client *client,
1769 struct ib_device *device, u8 port_num,
1770 int timeout_ms, gfp_t gfp_mask,
1771 void (*callback)(int status,
1772 struct ib_class_port_info *resp,
1773 void *context),
1774 void *context,
1775 struct ib_sa_query **sa_query)
1776 {
1777 struct ib_sa_classport_info_query *query;
1778 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1779 struct ib_sa_port *port;
1780 struct ib_mad_agent *agent;
1781 struct ib_sa_mad *mad;
1782 struct ib_class_port_info cached_class_port_info;
1783 int ret;
1784 unsigned long flags;
1785
1786 if (!sa_dev)
1787 return -ENODEV;
1788
1789 port = &sa_dev->port[port_num - sa_dev->start_port];
1790 agent = port->agent;
1791
1792 /* Use cached ClassPortInfo attribute if valid instead of sending mad */
1793 spin_lock_irqsave(&port->classport_lock, flags);
1794 if (port->classport_info.valid && callback) {
1795 memcpy(&cached_class_port_info, &port->classport_info.data,
1796 sizeof(cached_class_port_info));
1797 spin_unlock_irqrestore(&port->classport_lock, flags);
1798 callback(0, &cached_class_port_info, context);
1799 return 0;
1800 }
1801 spin_unlock_irqrestore(&port->classport_lock, flags);
1802
1803 query = kzalloc(sizeof(*query), gfp_mask);
1804 if (!query)
1805 return -ENOMEM;
1806
1807 query->sa_query.port = port;
1808 ret = alloc_mad(&query->sa_query, gfp_mask);
1809 if (ret)
1810 goto err1;
1811
1812 ib_sa_client_get(client);
1813 query->sa_query.client = client;
1814 query->callback = callback;
1815 query->context = context;
1816
1817 mad = query->sa_query.mad_buf->mad;
1818 init_mad(mad, agent);
1819
1820 query->sa_query.callback = callback ? ib_sa_classport_info_rec_callback : NULL;
1821
1822 query->sa_query.release = ib_sa_portclass_info_rec_release;
1823 /* support GET only */
1824 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1825 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO);
1826 mad->sa_hdr.comp_mask = 0;
1827 *sa_query = &query->sa_query;
1828
1829 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1830 if (ret < 0)
1831 goto err2;
1832
1833 return ret;
1834
1835 err2:
1836 *sa_query = NULL;
1837 ib_sa_client_put(query->sa_query.client);
1838 free_mad(&query->sa_query);
1839
1840 err1:
1841 kfree(query);
1842 return ret;
1843 }
1844 EXPORT_SYMBOL(ib_sa_classport_info_rec_query);
1845
1846 static void send_handler(struct ib_mad_agent *agent,
1847 struct ib_mad_send_wc *mad_send_wc)
1848 {
1849 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
1850 unsigned long flags;
1851
1852 if (query->callback)
1853 switch (mad_send_wc->status) {
1854 case IB_WC_SUCCESS:
1855 /* No callback -- already got recv */
1856 break;
1857 case IB_WC_RESP_TIMEOUT_ERR:
1858 query->callback(query, -ETIMEDOUT, NULL);
1859 break;
1860 case IB_WC_WR_FLUSH_ERR:
1861 query->callback(query, -EINTR, NULL);
1862 break;
1863 default:
1864 query->callback(query, -EIO, NULL);
1865 break;
1866 }
1867
1868 spin_lock_irqsave(&idr_lock, flags);
1869 idr_remove(&query_idr, query->id);
1870 spin_unlock_irqrestore(&idr_lock, flags);
1871
1872 free_mad(query);
1873 ib_sa_client_put(query->client);
1874 query->release(query);
1875 }
1876
1877 static void recv_handler(struct ib_mad_agent *mad_agent,
1878 struct ib_mad_send_buf *send_buf,
1879 struct ib_mad_recv_wc *mad_recv_wc)
1880 {
1881 struct ib_sa_query *query;
1882
1883 if (!send_buf)
1884 return;
1885
1886 query = send_buf->context[0];
1887 if (query->callback) {
1888 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
1889 query->callback(query,
1890 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
1891 -EINVAL : 0,
1892 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
1893 else
1894 query->callback(query, -EIO, NULL);
1895 }
1896
1897 ib_free_recv_mad(mad_recv_wc);
1898 }
1899
1900 static void ib_sa_add_one(struct ib_device *device)
1901 {
1902 struct ib_sa_device *sa_dev;
1903 int s, e, i;
1904 int count = 0;
1905
1906 s = rdma_start_port(device);
1907 e = rdma_end_port(device);
1908
1909 sa_dev = kzalloc(sizeof *sa_dev +
1910 (e - s + 1) * sizeof (struct ib_sa_port),
1911 GFP_KERNEL);
1912 if (!sa_dev)
1913 return;
1914
1915 sa_dev->start_port = s;
1916 sa_dev->end_port = e;
1917
1918 for (i = 0; i <= e - s; ++i) {
1919 spin_lock_init(&sa_dev->port[i].ah_lock);
1920 if (!rdma_cap_ib_sa(device, i + 1))
1921 continue;
1922
1923 sa_dev->port[i].sm_ah = NULL;
1924 sa_dev->port[i].port_num = i + s;
1925
1926 spin_lock_init(&sa_dev->port[i].classport_lock);
1927 sa_dev->port[i].classport_info.valid = false;
1928
1929 sa_dev->port[i].agent =
1930 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
1931 NULL, 0, send_handler,
1932 recv_handler, sa_dev, 0);
1933 if (IS_ERR(sa_dev->port[i].agent))
1934 goto err;
1935
1936 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
1937
1938 count++;
1939 }
1940
1941 if (!count)
1942 goto free;
1943
1944 ib_set_client_data(device, &sa_client, sa_dev);
1945
1946 /*
1947 * We register our event handler after everything is set up,
1948 * and then update our cached info after the event handler is
1949 * registered to avoid any problems if a port changes state
1950 * during our initialization.
1951 */
1952
1953 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
1954 if (ib_register_event_handler(&sa_dev->event_handler))
1955 goto err;
1956
1957 for (i = 0; i <= e - s; ++i) {
1958 if (rdma_cap_ib_sa(device, i + 1))
1959 update_sm_ah(&sa_dev->port[i].update_task);
1960 }
1961
1962 return;
1963
1964 err:
1965 while (--i >= 0) {
1966 if (rdma_cap_ib_sa(device, i + 1))
1967 ib_unregister_mad_agent(sa_dev->port[i].agent);
1968 }
1969 free:
1970 kfree(sa_dev);
1971 return;
1972 }
1973
1974 static void ib_sa_remove_one(struct ib_device *device, void *client_data)
1975 {
1976 struct ib_sa_device *sa_dev = client_data;
1977 int i;
1978
1979 if (!sa_dev)
1980 return;
1981
1982 ib_unregister_event_handler(&sa_dev->event_handler);
1983
1984 flush_workqueue(ib_wq);
1985
1986 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
1987 if (rdma_cap_ib_sa(device, i + 1)) {
1988 ib_unregister_mad_agent(sa_dev->port[i].agent);
1989 if (sa_dev->port[i].sm_ah)
1990 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
1991 }
1992
1993 }
1994
1995 kfree(sa_dev);
1996 }
1997
1998 int ib_sa_init(void)
1999 {
2000 int ret;
2001
2002 get_random_bytes(&tid, sizeof tid);
2003
2004 atomic_set(&ib_nl_sa_request_seq, 0);
2005
2006 ret = ib_register_client(&sa_client);
2007 if (ret) {
2008 pr_err("Couldn't register ib_sa client\n");
2009 goto err1;
2010 }
2011
2012 ret = mcast_init();
2013 if (ret) {
2014 pr_err("Couldn't initialize multicast handling\n");
2015 goto err2;
2016 }
2017
2018 ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM);
2019 if (!ib_nl_wq) {
2020 ret = -ENOMEM;
2021 goto err3;
2022 }
2023
2024 INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
2025
2026 return 0;
2027
2028 err3:
2029 mcast_cleanup();
2030 err2:
2031 ib_unregister_client(&sa_client);
2032 err1:
2033 return ret;
2034 }
2035
2036 void ib_sa_cleanup(void)
2037 {
2038 cancel_delayed_work(&ib_nl_timed_work);
2039 flush_workqueue(ib_nl_wq);
2040 destroy_workqueue(ib_nl_wq);
2041 mcast_cleanup();
2042 ib_unregister_client(&sa_client);
2043 idr_destroy(&query_idr);
2044 }
Linux with added FPC-III support