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IB/cm: Replace members of sa_path_rec with 'struct sgid_attr *'
[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>
d98bb7f7 53#include <rdma/opa_addr.h>
faec2f7b 54#include "sa.h"
20029832 55#include "core_priv.h"
1da177e4 56
2ca546b9
KW		 57#define IB_SA_LOCAL_SVC_TIMEOUT_MIN 100
58#define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT 2000
59#define IB_SA_LOCAL_SVC_TIMEOUT_MAX 200000
ee1c60b1
DC		 60#define IB_SA_CPI_MAX_RETRY_CNT 3
61#define IB_SA_CPI_RETRY_WAIT 1000 /*msecs */
2ca546b9
KW		 62static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT;
63
1da177e4
LT		 64struct ib_sa_sm_ah {
65 struct ib_ah *ah;
66 struct kref ref;
2aec5c60 67 u16 pkey_index;
d0e7bb14 68 u8 src_path_mask;
1da177e4
LT		 69};
70
2196f271
DC		 71enum rdma_class_port_info_type {
72 RDMA_CLASS_PORT_INFO_IB,
73 RDMA_CLASS_PORT_INFO_OPA
74};
75
76struct rdma_class_port_info {
77 enum rdma_class_port_info_type type;
78 union {
79 struct ib_class_port_info ib;
80 struct opa_class_port_info opa;
81 };
82};
83
3d3fd742
AV		 84struct ib_sa_classport_cache {
85 bool valid;
ee1c60b1 86 int retry_cnt;
2196f271 87 struct rdma_class_port_info data;
3d3fd742
AV		 88};
89
1da177e4
LT		 90struct ib_sa_port {
91 struct ib_mad_agent *agent;
1da177e4
LT		 92 struct ib_sa_sm_ah *sm_ah;
93 struct work_struct update_task;
3d3fd742 94 struct ib_sa_classport_cache classport_info;
ee1c60b1 95 struct delayed_work ib_cpi_work;
3d3fd742 96 spinlock_t classport_lock; /* protects class port info set */
1da177e4
LT		 97 spinlock_t ah_lock;
98 u8 port_num;
99};
100
101struct ib_sa_device {
102 int start_port, end_port;
103 struct ib_event_handler event_handler;
104 struct ib_sa_port port[0];
105};
106
107struct ib_sa_query {
108 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
109 void (*release)(struct ib_sa_query *);
c1a0b23b 110 struct ib_sa_client *client;
34816ad9
SH		 111 struct ib_sa_port *port;
112 struct ib_mad_send_buf *mad_buf;
113 struct ib_sa_sm_ah *sm_ah;
114 int id;
2ca546b9
KW		 115 u32 flags;
116 struct list_head list; /* Local svc request list */
117 u32 seq; /* Local svc request sequence number */
118 unsigned long timeout; /* Local svc timeout */
119 u8 path_use; /* How will the pathrecord be used */
1da177e4
LT		 120};
121
2ca546b9
KW		 122#define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001
123#define IB_SA_CANCEL 0x00000002
2196f271 124#define IB_SA_QUERY_OPA 0x00000004
2ca546b9 125
cbae32c5
HR		 126struct ib_sa_service_query {
127 void (*callback)(int, struct ib_sa_service_rec *, void *);
128 void *context;
129 struct ib_sa_query sa_query;
130};
131
1da177e4 132struct ib_sa_path_query {
c2f8fc4e 133 void (*callback)(int, struct sa_path_rec *, void *);
1da177e4
LT		 134 void *context;
135 struct ib_sa_query sa_query;
4c33bd19 136 struct sa_path_rec *conv_pr;
1da177e4
LT		 137};
138
aeab97ed
ES		 139struct ib_sa_guidinfo_query {
140 void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
141 void *context;
142 struct ib_sa_query sa_query;
143};
144
628e6f75 145struct ib_sa_classport_info_query {
ee1c60b1 146 void (*callback)(void *);
628e6f75
ES		 147 void *context;
148 struct ib_sa_query sa_query;
149};
150
1da177e4
LT		 151struct ib_sa_mcmember_query {
152 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
153 void *context;
154 struct ib_sa_query sa_query;
155};
156
2ca546b9
KW		 157static LIST_HEAD(ib_nl_request_list);
158static DEFINE_SPINLOCK(ib_nl_request_lock);
159static atomic_t ib_nl_sa_request_seq;
160static struct workqueue_struct *ib_nl_wq;
161static struct delayed_work ib_nl_timed_work;
162static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = {
163 [LS_NLA_TYPE_PATH_RECORD] = {.type = NLA_BINARY,
164 .len = sizeof(struct ib_path_rec_data)},
165 [LS_NLA_TYPE_TIMEOUT] = {.type = NLA_U32},
166 [LS_NLA_TYPE_SERVICE_ID] = {.type = NLA_U64},
167 [LS_NLA_TYPE_DGID] = {.type = NLA_BINARY,
168 .len = sizeof(struct rdma_nla_ls_gid)},
169 [LS_NLA_TYPE_SGID] = {.type = NLA_BINARY,
170 .len = sizeof(struct rdma_nla_ls_gid)},
171 [LS_NLA_TYPE_TCLASS] = {.type = NLA_U8},
172 [LS_NLA_TYPE_PKEY] = {.type = NLA_U16},
173 [LS_NLA_TYPE_QOS_CLASS] = {.type = NLA_U16},
174};
175
176
1da177e4 177static void ib_sa_add_one(struct ib_device *device);
7c1eb45a 178static void ib_sa_remove_one(struct ib_device *device, void *client_data);
1da177e4
LT		 179
180static struct ib_client sa_client = {
181 .name = "sa",
182 .add = ib_sa_add_one,
183 .remove = ib_sa_remove_one
184};
185
6276e08a 186static DEFINE_SPINLOCK(idr_lock);
1da177e4
LT		 187static DEFINE_IDR(query_idr);
188
6276e08a 189static DEFINE_SPINLOCK(tid_lock);
1da177e4
LT		 190static u32 tid;
191
1da177e4 192#define PATH_REC_FIELD(field) \
c2f8fc4e
DC		 193 .struct_offset_bytes = offsetof(struct sa_path_rec, field), \
194 .struct_size_bytes = sizeof((struct sa_path_rec *)0)->field, \
1da177e4
LT		 195 .field_name = "sa_path_rec:" #field
196
197static const struct ib_field path_rec_table[] = {
d3957b86 198 { PATH_REC_FIELD(service_id),
1da177e4
LT		 199 .offset_words = 0,
200 .offset_bits = 0,
733d65fe 201 .size_bits = 64 },
1da177e4
LT		 202 { PATH_REC_FIELD(dgid),
203 .offset_words = 2,
204 .offset_bits = 0,
205 .size_bits = 128 },
206 { PATH_REC_FIELD(sgid),
207 .offset_words = 6,
208 .offset_bits = 0,
209 .size_bits = 128 },
9fdca4da 210 { PATH_REC_FIELD(ib.dlid),
1da177e4
LT		 211 .offset_words = 10,
212 .offset_bits = 0,
213 .size_bits = 16 },
9fdca4da 214 { PATH_REC_FIELD(ib.slid),
1da177e4
LT		 215 .offset_words = 10,
216 .offset_bits = 16,
217 .size_bits = 16 },
9fdca4da 218 { PATH_REC_FIELD(ib.raw_traffic),
1da177e4
LT		 219 .offset_words = 11,
220 .offset_bits = 0,
221 .size_bits = 1 },
222 { RESERVED,
223 .offset_words = 11,
224 .offset_bits = 1,
225 .size_bits = 3 },
226 { PATH_REC_FIELD(flow_label),
227 .offset_words = 11,
228 .offset_bits = 4,
229 .size_bits = 20 },
230 { PATH_REC_FIELD(hop_limit),
231 .offset_words = 11,
232 .offset_bits = 24,
233 .size_bits = 8 },
234 { PATH_REC_FIELD(traffic_class),
235 .offset_words = 12,
236 .offset_bits = 0,
237 .size_bits = 8 },
238 { PATH_REC_FIELD(reversible),
239 .offset_words = 12,
240 .offset_bits = 8,
241 .size_bits = 1 },
242 { PATH_REC_FIELD(numb_path),
243 .offset_words = 12,
244 .offset_bits = 9,
245 .size_bits = 7 },
246 { PATH_REC_FIELD(pkey),
247 .offset_words = 12,
248 .offset_bits = 16,
249 .size_bits = 16 },
733d65fe 250 { PATH_REC_FIELD(qos_class),
1da177e4
LT		 251 .offset_words = 13,
252 .offset_bits = 0,
253 .size_bits = 12 },
254 { PATH_REC_FIELD(sl),
255 .offset_words = 13,
256 .offset_bits = 12,
257 .size_bits = 4 },
258 { PATH_REC_FIELD(mtu_selector),
259 .offset_words = 13,
260 .offset_bits = 16,
261 .size_bits = 2 },
262 { PATH_REC_FIELD(mtu),
263 .offset_words = 13,
264 .offset_bits = 18,
265 .size_bits = 6 },
266 { PATH_REC_FIELD(rate_selector),
267 .offset_words = 13,
268 .offset_bits = 24,
269 .size_bits = 2 },
270 { PATH_REC_FIELD(rate),
271 .offset_words = 13,
272 .offset_bits = 26,
273 .size_bits = 6 },
274 { PATH_REC_FIELD(packet_life_time_selector),
275 .offset_words = 14,
276 .offset_bits = 0,
277 .size_bits = 2 },
278 { PATH_REC_FIELD(packet_life_time),
279 .offset_words = 14,
280 .offset_bits = 2,
281 .size_bits = 6 },
282 { PATH_REC_FIELD(preference),
283 .offset_words = 14,
284 .offset_bits = 8,
285 .size_bits = 8 },
286 { RESERVED,
287 .offset_words = 14,
288 .offset_bits = 16,
289 .size_bits = 48 },
290};
291
4c33bd19
DC		 292#define OPA_PATH_REC_FIELD(field) \
293 .struct_offset_bytes = \
294 offsetof(struct sa_path_rec, field), \
295 .struct_size_bytes = \
296 sizeof((struct sa_path_rec *)0)->field, \
297 .field_name = "sa_path_rec:" #field
298
299static const struct ib_field opa_path_rec_table[] = {
d3957b86 300 { OPA_PATH_REC_FIELD(service_id),
4c33bd19
DC		 301 .offset_words = 0,
302 .offset_bits = 0,
303 .size_bits = 64 },
304 { OPA_PATH_REC_FIELD(dgid),
305 .offset_words = 2,
306 .offset_bits = 0,
307 .size_bits = 128 },
308 { OPA_PATH_REC_FIELD(sgid),
309 .offset_words = 6,
310 .offset_bits = 0,
311 .size_bits = 128 },
312 { OPA_PATH_REC_FIELD(opa.dlid),
313 .offset_words = 10,
314 .offset_bits = 0,
315 .size_bits = 32 },
316 { OPA_PATH_REC_FIELD(opa.slid),
317 .offset_words = 11,
318 .offset_bits = 0,
319 .size_bits = 32 },
320 { OPA_PATH_REC_FIELD(opa.raw_traffic),
321 .offset_words = 12,
322 .offset_bits = 0,
323 .size_bits = 1 },
324 { RESERVED,
325 .offset_words = 12,
326 .offset_bits = 1,
327 .size_bits = 3 },
328 { OPA_PATH_REC_FIELD(flow_label),
329 .offset_words = 12,
330 .offset_bits = 4,
331 .size_bits = 20 },
332 { OPA_PATH_REC_FIELD(hop_limit),
333 .offset_words = 12,
334 .offset_bits = 24,
335 .size_bits = 8 },
336 { OPA_PATH_REC_FIELD(traffic_class),
337 .offset_words = 13,
338 .offset_bits = 0,
339 .size_bits = 8 },
340 { OPA_PATH_REC_FIELD(reversible),
341 .offset_words = 13,
342 .offset_bits = 8,
343 .size_bits = 1 },
344 { OPA_PATH_REC_FIELD(numb_path),
345 .offset_words = 13,
346 .offset_bits = 9,
347 .size_bits = 7 },
348 { OPA_PATH_REC_FIELD(pkey),
349 .offset_words = 13,
350 .offset_bits = 16,
351 .size_bits = 16 },
352 { OPA_PATH_REC_FIELD(opa.l2_8B),
353 .offset_words = 14,
354 .offset_bits = 0,
355 .size_bits = 1 },
356 { OPA_PATH_REC_FIELD(opa.l2_10B),
357 .offset_words = 14,
358 .offset_bits = 1,
359 .size_bits = 1 },
360 { OPA_PATH_REC_FIELD(opa.l2_9B),
361 .offset_words = 14,
362 .offset_bits = 2,
363 .size_bits = 1 },
364 { OPA_PATH_REC_FIELD(opa.l2_16B),
365 .offset_words = 14,
366 .offset_bits = 3,
367 .size_bits = 1 },
368 { RESERVED,
369 .offset_words = 14,
370 .offset_bits = 4,
371 .size_bits = 2 },
372 { OPA_PATH_REC_FIELD(opa.qos_type),
373 .offset_words = 14,
374 .offset_bits = 6,
375 .size_bits = 2 },
376 { OPA_PATH_REC_FIELD(opa.qos_priority),
377 .offset_words = 14,
378 .offset_bits = 8,
379 .size_bits = 8 },
380 { RESERVED,
381 .offset_words = 14,
382 .offset_bits = 16,
383 .size_bits = 3 },
384 { OPA_PATH_REC_FIELD(sl),
385 .offset_words = 14,
386 .offset_bits = 19,
387 .size_bits = 5 },
388 { RESERVED,
389 .offset_words = 14,
390 .offset_bits = 24,
391 .size_bits = 8 },
392 { OPA_PATH_REC_FIELD(mtu_selector),
393 .offset_words = 15,
394 .offset_bits = 0,
395 .size_bits = 2 },
396 { OPA_PATH_REC_FIELD(mtu),
397 .offset_words = 15,
398 .offset_bits = 2,
399 .size_bits = 6 },
400 { OPA_PATH_REC_FIELD(rate_selector),
401 .offset_words = 15,
402 .offset_bits = 8,
403 .size_bits = 2 },
404 { OPA_PATH_REC_FIELD(rate),
405 .offset_words = 15,
406 .offset_bits = 10,
407 .size_bits = 6 },
408 { OPA_PATH_REC_FIELD(packet_life_time_selector),
409 .offset_words = 15,
410 .offset_bits = 16,
411 .size_bits = 2 },
412 { OPA_PATH_REC_FIELD(packet_life_time),
413 .offset_words = 15,
414 .offset_bits = 18,
415 .size_bits = 6 },
416 { OPA_PATH_REC_FIELD(preference),
417 .offset_words = 15,
418 .offset_bits = 24,
419 .size_bits = 8 },
420};
421
1da177e4
LT		 422#define MCMEMBER_REC_FIELD(field) \
423 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
424 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
425 .field_name = "sa_mcmember_rec:" #field
426
427static const struct ib_field mcmember_rec_table[] = {
428 { MCMEMBER_REC_FIELD(mgid),
429 .offset_words = 0,
430 .offset_bits = 0,
431 .size_bits = 128 },
432 { MCMEMBER_REC_FIELD(port_gid),
433 .offset_words = 4,
434 .offset_bits = 0,
435 .size_bits = 128 },
436 { MCMEMBER_REC_FIELD(qkey),
437 .offset_words = 8,
438 .offset_bits = 0,
439 .size_bits = 32 },
440 { MCMEMBER_REC_FIELD(mlid),
441 .offset_words = 9,
442 .offset_bits = 0,
443 .size_bits = 16 },
444 { MCMEMBER_REC_FIELD(mtu_selector),
445 .offset_words = 9,
446 .offset_bits = 16,
447 .size_bits = 2 },
448 { MCMEMBER_REC_FIELD(mtu),
449 .offset_words = 9,
450 .offset_bits = 18,
451 .size_bits = 6 },
452 { MCMEMBER_REC_FIELD(traffic_class),
453 .offset_words = 9,
454 .offset_bits = 24,
455 .size_bits = 8 },
456 { MCMEMBER_REC_FIELD(pkey),
457 .offset_words = 10,
458 .offset_bits = 0,
459 .size_bits = 16 },
460 { MCMEMBER_REC_FIELD(rate_selector),
461 .offset_words = 10,
462 .offset_bits = 16,
463 .size_bits = 2 },
464 { MCMEMBER_REC_FIELD(rate),
465 .offset_words = 10,
466 .offset_bits = 18,
467 .size_bits = 6 },
468 { MCMEMBER_REC_FIELD(packet_life_time_selector),
469 .offset_words = 10,
470 .offset_bits = 24,
471 .size_bits = 2 },
472 { MCMEMBER_REC_FIELD(packet_life_time),
473 .offset_words = 10,
474 .offset_bits = 26,
475 .size_bits = 6 },
476 { MCMEMBER_REC_FIELD(sl),
477 .offset_words = 11,
478 .offset_bits = 0,
479 .size_bits = 4 },
480 { MCMEMBER_REC_FIELD(flow_label),
481 .offset_words = 11,
482 .offset_bits = 4,
483 .size_bits = 20 },
484 { MCMEMBER_REC_FIELD(hop_limit),
485 .offset_words = 11,
486 .offset_bits = 24,
487 .size_bits = 8 },
488 { MCMEMBER_REC_FIELD(scope),
489 .offset_words = 12,
490 .offset_bits = 0,
491 .size_bits = 4 },
492 { MCMEMBER_REC_FIELD(join_state),
493 .offset_words = 12,
494 .offset_bits = 4,
495 .size_bits = 4 },
496 { MCMEMBER_REC_FIELD(proxy_join),
497 .offset_words = 12,
498 .offset_bits = 8,
499 .size_bits = 1 },
500 { RESERVED,
501 .offset_words = 12,
502 .offset_bits = 9,
503 .size_bits = 23 },
504};
505
cbae32c5
HR		 506#define SERVICE_REC_FIELD(field) \
507 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
508 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
509 .field_name = "sa_service_rec:" #field
510
511static const struct ib_field service_rec_table[] = {
512 { SERVICE_REC_FIELD(id),
513 .offset_words = 0,
514 .offset_bits = 0,
515 .size_bits = 64 },
516 { SERVICE_REC_FIELD(gid),
517 .offset_words = 2,
518 .offset_bits = 0,
519 .size_bits = 128 },
520 { SERVICE_REC_FIELD(pkey),
521 .offset_words = 6,
522 .offset_bits = 0,
523 .size_bits = 16 },
524 { SERVICE_REC_FIELD(lease),
525 .offset_words = 7,
526 .offset_bits = 0,
527 .size_bits = 32 },
528 { SERVICE_REC_FIELD(key),
529 .offset_words = 8,
530 .offset_bits = 0,
531 .size_bits = 128 },
532 { SERVICE_REC_FIELD(name),
533 .offset_words = 12,
534 .offset_bits = 0,
535 .size_bits = 64*8 },
536 { SERVICE_REC_FIELD(data8),
537 .offset_words = 28,
538 .offset_bits = 0,
539 .size_bits = 16*8 },
540 { SERVICE_REC_FIELD(data16),
541 .offset_words = 32,
542 .offset_bits = 0,
543 .size_bits = 8*16 },
544 { SERVICE_REC_FIELD(data32),
545 .offset_words = 36,
546 .offset_bits = 0,
547 .size_bits = 4*32 },
548 { SERVICE_REC_FIELD(data64),
549 .offset_words = 40,
550 .offset_bits = 0,
551 .size_bits = 2*64 },
552};
553
628e6f75
ES		 554#define CLASSPORTINFO_REC_FIELD(field) \
555 .struct_offset_bytes = offsetof(struct ib_class_port_info, field), \
556 .struct_size_bytes = sizeof((struct ib_class_port_info *)0)->field, \
557 .field_name = "ib_class_port_info:" #field
558
2196f271 559static const struct ib_field ib_classport_info_rec_table[] = {
628e6f75
ES		 560 { CLASSPORTINFO_REC_FIELD(base_version),
561 .offset_words = 0,
562 .offset_bits = 0,
563 .size_bits = 8 },
564 { CLASSPORTINFO_REC_FIELD(class_version),
565 .offset_words = 0,
566 .offset_bits = 8,
567 .size_bits = 8 },
568 { CLASSPORTINFO_REC_FIELD(capability_mask),
569 .offset_words = 0,
570 .offset_bits = 16,
571 .size_bits = 16 },
572 { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
573 .offset_words = 1,
574 .offset_bits = 0,
575 .size_bits = 32 },
576 { CLASSPORTINFO_REC_FIELD(redirect_gid),
577 .offset_words = 2,
578 .offset_bits = 0,
579 .size_bits = 128 },
580 { CLASSPORTINFO_REC_FIELD(redirect_tcslfl),
581 .offset_words = 6,
582 .offset_bits = 0,
583 .size_bits = 32 },
584 { CLASSPORTINFO_REC_FIELD(redirect_lid),
585 .offset_words = 7,
586 .offset_bits = 0,
587 .size_bits = 16 },
588 { CLASSPORTINFO_REC_FIELD(redirect_pkey),
589 .offset_words = 7,
590 .offset_bits = 16,
591 .size_bits = 16 },
592
593 { CLASSPORTINFO_REC_FIELD(redirect_qp),
594 .offset_words = 8,
595 .offset_bits = 0,
596 .size_bits = 32 },
597 { CLASSPORTINFO_REC_FIELD(redirect_qkey),
598 .offset_words = 9,
599 .offset_bits = 0,
600 .size_bits = 32 },
601
602 { CLASSPORTINFO_REC_FIELD(trap_gid),
603 .offset_words = 10,
604 .offset_bits = 0,
605 .size_bits = 128 },
606 { CLASSPORTINFO_REC_FIELD(trap_tcslfl),
607 .offset_words = 14,
608 .offset_bits = 0,
609 .size_bits = 32 },
610
611 { CLASSPORTINFO_REC_FIELD(trap_lid),
612 .offset_words = 15,
613 .offset_bits = 0,
614 .size_bits = 16 },
615 { CLASSPORTINFO_REC_FIELD(trap_pkey),
616 .offset_words = 15,
617 .offset_bits = 16,
618 .size_bits = 16 },
619
620 { CLASSPORTINFO_REC_FIELD(trap_hlqp),
621 .offset_words = 16,
622 .offset_bits = 0,
623 .size_bits = 32 },
624 { CLASSPORTINFO_REC_FIELD(trap_qkey),
625 .offset_words = 17,
626 .offset_bits = 0,
627 .size_bits = 32 },
628};
629
2196f271
DC		 630#define OPA_CLASSPORTINFO_REC_FIELD(field) \
631 .struct_offset_bytes =\
632 offsetof(struct opa_class_port_info, field), \
633 .struct_size_bytes = \
634 sizeof((struct opa_class_port_info *)0)->field, \
635 .field_name = "opa_class_port_info:" #field
636
637static const struct ib_field opa_classport_info_rec_table[] = {
638 { OPA_CLASSPORTINFO_REC_FIELD(base_version),
639 .offset_words = 0,
640 .offset_bits = 0,
641 .size_bits = 8 },
642 { OPA_CLASSPORTINFO_REC_FIELD(class_version),
643 .offset_words = 0,
644 .offset_bits = 8,
645 .size_bits = 8 },
646 { OPA_CLASSPORTINFO_REC_FIELD(cap_mask),
647 .offset_words = 0,
648 .offset_bits = 16,
649 .size_bits = 16 },
650 { OPA_CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
651 .offset_words = 1,
652 .offset_bits = 0,
653 .size_bits = 32 },
654 { OPA_CLASSPORTINFO_REC_FIELD(redirect_gid),
655 .offset_words = 2,
656 .offset_bits = 0,
657 .size_bits = 128 },
658 { OPA_CLASSPORTINFO_REC_FIELD(redirect_tc_fl),
659 .offset_words = 6,
660 .offset_bits = 0,
661 .size_bits = 32 },
662 { OPA_CLASSPORTINFO_REC_FIELD(redirect_lid),
663 .offset_words = 7,
664 .offset_bits = 0,
665 .size_bits = 32 },
666 { OPA_CLASSPORTINFO_REC_FIELD(redirect_sl_qp),
667 .offset_words = 8,
668 .offset_bits = 0,
669 .size_bits = 32 },
670 { OPA_CLASSPORTINFO_REC_FIELD(redirect_qkey),
671 .offset_words = 9,
672 .offset_bits = 0,
673 .size_bits = 32 },
674 { OPA_CLASSPORTINFO_REC_FIELD(trap_gid),
675 .offset_words = 10,
676 .offset_bits = 0,
677 .size_bits = 128 },
678 { OPA_CLASSPORTINFO_REC_FIELD(trap_tc_fl),
679 .offset_words = 14,
680 .offset_bits = 0,
681 .size_bits = 32 },
682 { OPA_CLASSPORTINFO_REC_FIELD(trap_lid),
683 .offset_words = 15,
684 .offset_bits = 0,
685 .size_bits = 32 },
686 { OPA_CLASSPORTINFO_REC_FIELD(trap_hl_qp),
687 .offset_words = 16,
688 .offset_bits = 0,
689 .size_bits = 32 },
690 { OPA_CLASSPORTINFO_REC_FIELD(trap_qkey),
691 .offset_words = 17,
692 .offset_bits = 0,
693 .size_bits = 32 },
694 { OPA_CLASSPORTINFO_REC_FIELD(trap_pkey),
695 .offset_words = 18,
696 .offset_bits = 0,
697 .size_bits = 16 },
698 { OPA_CLASSPORTINFO_REC_FIELD(redirect_pkey),
699 .offset_words = 18,
700 .offset_bits = 16,
701 .size_bits = 16 },
702 { OPA_CLASSPORTINFO_REC_FIELD(trap_sl_rsvd),
703 .offset_words = 19,
704 .offset_bits = 0,
705 .size_bits = 8 },
706 { RESERVED,
707 .offset_words = 19,
708 .offset_bits = 8,
709 .size_bits = 24 },
710};
711
aeab97ed
ES		 712#define GUIDINFO_REC_FIELD(field) \
713 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \
714 .struct_size_bytes = sizeof((struct ib_sa_guidinfo_rec *) 0)->field, \
715 .field_name = "sa_guidinfo_rec:" #field
716
717static const struct ib_field guidinfo_rec_table[] = {
718 { GUIDINFO_REC_FIELD(lid),
719 .offset_words = 0,
720 .offset_bits = 0,
721 .size_bits = 16 },
722 { GUIDINFO_REC_FIELD(block_num),
723 .offset_words = 0,
724 .offset_bits = 16,
725 .size_bits = 8 },
726 { GUIDINFO_REC_FIELD(res1),
727 .offset_words = 0,
728 .offset_bits = 24,
729 .size_bits = 8 },
730 { GUIDINFO_REC_FIELD(res2),
731 .offset_words = 1,
732 .offset_bits = 0,
733 .size_bits = 32 },
734 { GUIDINFO_REC_FIELD(guid_info_list),
735 .offset_words = 2,
736 .offset_bits = 0,
737 .size_bits = 512 },
738};
739
2ca546b9
KW		 740static inline void ib_sa_disable_local_svc(struct ib_sa_query *query)
741{
742 query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE;
743}
744
745static inline int ib_sa_query_cancelled(struct ib_sa_query *query)
746{
747 return (query->flags & IB_SA_CANCEL);
748}
749
750static void ib_nl_set_path_rec_attrs(struct sk_buff *skb,
751 struct ib_sa_query *query)
752{
c2f8fc4e 753 struct sa_path_rec *sa_rec = query->mad_buf->context[1];
2ca546b9
KW		 754 struct ib_sa_mad *mad = query->mad_buf->mad;
755 ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask;
756 u16 val16;
757 u64 val64;
758 struct rdma_ls_resolve_header *header;
759
760 query->mad_buf->context[1] = NULL;
761
762 /* Construct the family header first */
4df864c1 763 header = skb_put(skb, NLMSG_ALIGN(sizeof(*header)));
2ca546b9
KW		 764 memcpy(header->device_name, query->port->agent->device->name,
765 LS_DEVICE_NAME_MAX);
766 header->port_num = query->port->port_num;
767
768 if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) &&
769 sa_rec->reversible != 0)
770 query->path_use = LS_RESOLVE_PATH_USE_GMP;
771 else
772 query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL;
773 header->path_use = query->path_use;
774
775 /* Now build the attributes */
776 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) {
d3957b86 777 val64 = be64_to_cpu(sa_rec->service_id);
2ca546b9
KW		 778 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID,
779 sizeof(val64), &val64);
780 }
781 if (comp_mask & IB_SA_PATH_REC_DGID)
782 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID,
783 sizeof(sa_rec->dgid), &sa_rec->dgid);
784 if (comp_mask & IB_SA_PATH_REC_SGID)
785 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID,
786 sizeof(sa_rec->sgid), &sa_rec->sgid);
787 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
788 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS,
789 sizeof(sa_rec->traffic_class), &sa_rec->traffic_class);
790
791 if (comp_mask & IB_SA_PATH_REC_PKEY) {
792 val16 = be16_to_cpu(sa_rec->pkey);
793 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY,
794 sizeof(val16), &val16);
795 }
796 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) {
797 val16 = be16_to_cpu(sa_rec->qos_class);
798 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS,
799 sizeof(val16), &val16);
800 }
801}
802
803static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask)
804{
805 int len = 0;
806
807 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID)
808 len += nla_total_size(sizeof(u64));
809 if (comp_mask & IB_SA_PATH_REC_DGID)
810 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
811 if (comp_mask & IB_SA_PATH_REC_SGID)
812 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
813 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
814 len += nla_total_size(sizeof(u8));
815 if (comp_mask & IB_SA_PATH_REC_PKEY)
816 len += nla_total_size(sizeof(u16));
817 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS)
818 len += nla_total_size(sizeof(u16));
819
820 /*
821 * Make sure that at least some of the required comp_mask bits are
822 * set.
823 */
824 if (WARN_ON(len == 0))
825 return len;
826
827 /* Add the family header */
828 len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header));
829
830 return len;
831}
832
3ebd2fd0 833static int ib_nl_send_msg(struct ib_sa_query *query, gfp_t gfp_mask)
2ca546b9
KW		 834{
835 struct sk_buff *skb = NULL;
836 struct nlmsghdr *nlh;
837 void *data;
838 int ret = 0;
839 struct ib_sa_mad *mad;
840 int len;
841
842 mad = query->mad_buf->mad;
843 len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask);
844 if (len <= 0)
845 return -EMSGSIZE;
846
3ebd2fd0 847 skb = nlmsg_new(len, gfp_mask);
2ca546b9
KW		 848 if (!skb)
849 return -ENOMEM;
850
851 /* Put nlmsg header only for now */
852 data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS,
ba13b5f8 853 RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST);
2ca546b9 854 if (!data) {
0f377d86 855 nlmsg_free(skb);
2ca546b9
KW		 856 return -EMSGSIZE;
857 }
858
859 /* Add attributes */
860 ib_nl_set_path_rec_attrs(skb, query);
861
862 /* Repair the nlmsg header length */
863 nlmsg_end(skb, nlh);
864
4d7f693a 865 ret = rdma_nl_multicast(skb, RDMA_NL_GROUP_LS, gfp_mask);
2ca546b9
KW		 866 if (!ret)
867 ret = len;
868 else
869 ret = 0;
870
871 return ret;
872}
873
3ebd2fd0 874static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
2ca546b9
KW		 875{
876 unsigned long flags;
877 unsigned long delay;
878 int ret;
879
880 INIT_LIST_HEAD(&query->list);
881 query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq);
882
3ebd2fd0 883 /* Put the request on the list first.*/
2ca546b9 884 spin_lock_irqsave(&ib_nl_request_lock, flags);
2ca546b9
KW		 885 delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
886 query->timeout = delay + jiffies;
887 list_add_tail(&query->list, &ib_nl_request_list);
888 /* Start the timeout if this is the only request */
889 if (ib_nl_request_list.next == &query->list)
890 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
2ca546b9
KW		 891 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
892
3ebd2fd0
KW		 893 ret = ib_nl_send_msg(query, gfp_mask);
894 if (ret <= 0) {
895 ret = -EIO;
896 /* Remove the request */
897 spin_lock_irqsave(&ib_nl_request_lock, flags);
898 list_del(&query->list);
899 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
900 } else {
901 ret = 0;
902 }
903
2ca546b9
KW		 904 return ret;
905}
906
907static int ib_nl_cancel_request(struct ib_sa_query *query)
908{
909 unsigned long flags;
910 struct ib_sa_query *wait_query;
911 int found = 0;
912
913 spin_lock_irqsave(&ib_nl_request_lock, flags);
914 list_for_each_entry(wait_query, &ib_nl_request_list, list) {
915 /* Let the timeout to take care of the callback */
916 if (query == wait_query) {
917 query->flags |= IB_SA_CANCEL;
918 query->timeout = jiffies;
919 list_move(&query->list, &ib_nl_request_list);
920 found = 1;
921 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1);
922 break;
923 }
924 }
925 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
926
927 return found;
928}
929
930static void send_handler(struct ib_mad_agent *agent,
931 struct ib_mad_send_wc *mad_send_wc);
932
933static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
934 const struct nlmsghdr *nlh)
935{
936 struct ib_mad_send_wc mad_send_wc;
937 struct ib_sa_mad *mad = NULL;
938 const struct nlattr *head, *curr;
939 struct ib_path_rec_data *rec;
940 int len, rem;
941 u32 mask = 0;
942 int status = -EIO;
943
944 if (query->callback) {
945 head = (const struct nlattr *) nlmsg_data(nlh);
946 len = nlmsg_len(nlh);
947 switch (query->path_use) {
948 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL:
949 mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND;
950 break;
951
952 case LS_RESOLVE_PATH_USE_ALL:
953 case LS_RESOLVE_PATH_USE_GMP:
954 default:
955 mask = IB_PATH_PRIMARY | IB_PATH_GMP |
956 IB_PATH_BIDIRECTIONAL;
957 break;
958 }
959 nla_for_each_attr(curr, head, len, rem) {
960 if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
961 rec = nla_data(curr);
962 /*
963 * Get the first one. In the future, we may
964 * need to get up to 6 pathrecords.
965 */
966 if ((rec->flags & mask) == mask) {
967 mad = query->mad_buf->mad;
968 mad->mad_hdr.method |=
969 IB_MGMT_METHOD_RESP;
970 memcpy(mad->data, rec->path_rec,
971 sizeof(rec->path_rec));
972 status = 0;
973 break;
974 }
975 }
976 }
977 query->callback(query, status, mad);
978 }
979
980 mad_send_wc.send_buf = query->mad_buf;
981 mad_send_wc.status = IB_WC_SUCCESS;
982 send_handler(query->mad_buf->mad_agent, &mad_send_wc);
983}
984
985static void ib_nl_request_timeout(struct work_struct *work)
986{
987 unsigned long flags;
988 struct ib_sa_query *query;
989 unsigned long delay;
990 struct ib_mad_send_wc mad_send_wc;
991 int ret;
992
993 spin_lock_irqsave(&ib_nl_request_lock, flags);
994 while (!list_empty(&ib_nl_request_list)) {
995 query = list_entry(ib_nl_request_list.next,
996 struct ib_sa_query, list);
997
998 if (time_after(query->timeout, jiffies)) {
999 delay = query->timeout - jiffies;
1000 if ((long)delay <= 0)
1001 delay = 1;
1002 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
1003 break;
1004 }
1005
1006 list_del(&query->list);
1007 ib_sa_disable_local_svc(query);
1008 /* Hold the lock to protect against query cancellation */
1009 if (ib_sa_query_cancelled(query))
1010 ret = -1;
1011 else
1012 ret = ib_post_send_mad(query->mad_buf, NULL);
1013 if (ret) {
1014 mad_send_wc.send_buf = query->mad_buf;
1015 mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
1016 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1017 send_handler(query->port->agent, &mad_send_wc);
1018 spin_lock_irqsave(&ib_nl_request_lock, flags);
1019 }
1020 }
1021 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1022}
1023
735c631a 1024int ib_nl_handle_set_timeout(struct sk_buff *skb,
647c75ac
LR		 1025 struct nlmsghdr *nlh,
1026 struct netlink_ext_ack *extack)
2ca546b9 1027{
2ca546b9
KW		 1028 int timeout, delta, abs_delta;
1029 const struct nlattr *attr;
1030 unsigned long flags;
1031 struct ib_sa_query *query;
1032 long delay = 0;
1033 struct nlattr *tb[LS_NLA_TYPE_MAX];
1034 int ret;
1035
2deeb477 1036 if (!(nlh->nlmsg_flags & NLM_F_REQUEST) ||
e3a2b93d 1037 !(NETLINK_CB(skb).sk))
2ca546b9
KW		 1038 return -EPERM;
1039
1040 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
fceb6435 1041 nlmsg_len(nlh), ib_nl_policy, NULL);
2ca546b9
KW		 1042 attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT];
1043 if (ret || !attr)
1044 goto settimeout_out;
1045
1046 timeout = *(int *) nla_data(attr);
1047 if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN)
1048 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN;
1049 if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX)
1050 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX;
1051
1052 delta = timeout - sa_local_svc_timeout_ms;
1053 if (delta < 0)
1054 abs_delta = -delta;
1055 else
1056 abs_delta = delta;
1057
1058 if (delta != 0) {
1059 spin_lock_irqsave(&ib_nl_request_lock, flags);
1060 sa_local_svc_timeout_ms = timeout;
1061 list_for_each_entry(query, &ib_nl_request_list, list) {
1062 if (delta < 0 && abs_delta > query->timeout)
1063 query->timeout = 0;
1064 else
1065 query->timeout += delta;
1066
1067 /* Get the new delay from the first entry */
1068 if (!delay) {
1069 delay = query->timeout - jiffies;
1070 if (delay <= 0)
1071 delay = 1;
1072 }
1073 }
1074 if (delay)
1075 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work,
1076 (unsigned long)delay);
1077 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1078 }
1079
1080settimeout_out:
1081 return skb->len;
1082}
1083
1084static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh)
1085{
1086 struct nlattr *tb[LS_NLA_TYPE_MAX];
1087 int ret;
1088
1089 if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR)
1090 return 0;
1091
1092 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
fceb6435 1093 nlmsg_len(nlh), ib_nl_policy, NULL);
2ca546b9
KW		 1094 if (ret)
1095 return 0;
1096
1097 return 1;
1098}
1099
735c631a 1100int ib_nl_handle_resolve_resp(struct sk_buff *skb,
647c75ac
LR		 1101 struct nlmsghdr *nlh,
1102 struct netlink_ext_ack *extack)
2ca546b9 1103{
2ca546b9
KW		 1104 unsigned long flags;
1105 struct ib_sa_query *query;
1106 struct ib_mad_send_buf *send_buf;
1107 struct ib_mad_send_wc mad_send_wc;
1108 int found = 0;
1109 int ret;
1110
2deeb477 1111 if ((nlh->nlmsg_flags & NLM_F_REQUEST) ||
e3a2b93d 1112 !(NETLINK_CB(skb).sk))
2ca546b9
KW		 1113 return -EPERM;
1114
1115 spin_lock_irqsave(&ib_nl_request_lock, flags);
1116 list_for_each_entry(query, &ib_nl_request_list, list) {
1117 /*
1118 * If the query is cancelled, let the timeout routine
1119 * take care of it.
1120 */
1121 if (nlh->nlmsg_seq == query->seq) {
1122 found = !ib_sa_query_cancelled(query);
1123 if (found)
1124 list_del(&query->list);
1125 break;
1126 }
1127 }
1128
1129 if (!found) {
1130 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1131 goto resp_out;
1132 }
1133
1134 send_buf = query->mad_buf;
1135
1136 if (!ib_nl_is_good_resolve_resp(nlh)) {
1137 /* if the result is a failure, send out the packet via IB */
1138 ib_sa_disable_local_svc(query);
1139 ret = ib_post_send_mad(query->mad_buf, NULL);
1140 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1141 if (ret) {
1142 mad_send_wc.send_buf = send_buf;
1143 mad_send_wc.status = IB_WC_GENERAL_ERR;
1144 send_handler(query->port->agent, &mad_send_wc);
1145 }
1146 } else {
1147 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1148 ib_nl_process_good_resolve_rsp(query, nlh);
1149 }
1150
1151resp_out:
1152 return skb->len;
1153}
1154
1da177e4
LT		 1155static void free_sm_ah(struct kref *kref)
1156{
1157 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
1158
36523159 1159 rdma_destroy_ah(sm_ah->ah);
1da177e4
LT		 1160 kfree(sm_ah);
1161}
1162
c1a0b23b
MT		 1163void ib_sa_register_client(struct ib_sa_client *client)
1164{
1165 atomic_set(&client->users, 1);
1166 init_completion(&client->comp);
1167}
1168EXPORT_SYMBOL(ib_sa_register_client);
1169
c1a0b23b
MT		 1170void ib_sa_unregister_client(struct ib_sa_client *client)
1171{
1172 ib_sa_client_put(client);
1173 wait_for_completion(&client->comp);
1174}
1175EXPORT_SYMBOL(ib_sa_unregister_client);
1176
1da177e4
LT		 1177/**
1178 * ib_sa_cancel_query - try to cancel an SA query
1179 * @id:ID of query to cancel
1180 * @query:query pointer to cancel
1181 *
1182 * Try to cancel an SA query. If the id and query don't match up or
1183 * the query has already completed, nothing is done. Otherwise the
1184 * query is canceled and will complete with a status of -EINTR.
1185 */
1186void ib_sa_cancel_query(int id, struct ib_sa_query *query)
1187{
1188 unsigned long flags;
1189 struct ib_mad_agent *agent;
34816ad9 1190 struct ib_mad_send_buf *mad_buf;
1da177e4
LT		 1191
1192 spin_lock_irqsave(&idr_lock, flags);
1193 if (idr_find(&query_idr, id) != query) {
1194 spin_unlock_irqrestore(&idr_lock, flags);
1195 return;
1196 }
1197 agent = query->port->agent;
34816ad9 1198 mad_buf = query->mad_buf;
1da177e4
LT		 1199 spin_unlock_irqrestore(&idr_lock, flags);
1200
2ca546b9
KW		 1201 /*
1202 * If the query is still on the netlink request list, schedule
1203 * it to be cancelled by the timeout routine. Otherwise, it has been
1204 * sent to the MAD layer and has to be cancelled from there.
1205 */
1206 if (!ib_nl_cancel_request(query))
1207 ib_cancel_mad(agent, mad_buf);
1da177e4
LT		 1208}
1209EXPORT_SYMBOL(ib_sa_cancel_query);
1210
d0e7bb14
SH		 1211static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
1212{
1213 struct ib_sa_device *sa_dev;
1214 struct ib_sa_port *port;
1215 unsigned long flags;
1216 u8 src_path_mask;
1217
1218 sa_dev = ib_get_client_data(device, &sa_client);
1219 if (!sa_dev)
1220 return 0x7f;
1221
1222 port = &sa_dev->port[port_num - sa_dev->start_port];
1223 spin_lock_irqsave(&port->ah_lock, flags);
1224 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
1225 spin_unlock_irqrestore(&port->ah_lock, flags);
1226
1227 return src_path_mask;
1228}
1229
0a514159
PP		 1230static int
1231roce_resolve_route_from_path(struct ib_device *device, u8 port_num,
39839107
PP		 1232 struct sa_path_rec *rec,
1233 const struct ib_gid_attr *attr)
6d969a47 1234{
0a514159 1235 struct net_device *resolved_dev;
0a514159 1236 struct net_device *idev;
39839107 1237 struct rdma_dev_addr dev_addr = {};
0a514159
PP		 1238 union {
1239 struct sockaddr _sockaddr;
1240 struct sockaddr_in _sockaddr_in;
1241 struct sockaddr_in6 _sockaddr_in6;
1242 } sgid_addr, dgid_addr;
6d969a47 1243 int ret;
6d969a47 1244
114cc9c4
PP		 1245 if (rec->roce.route_resolved)
1246 return 0;
39839107
PP		 1247 if (!attr || !attr->ndev)
1248 return -EINVAL;
1249
1250 dev_addr.bound_dev_if = attr->ndev->ifindex;
1251 /* TODO: Use net from the ib_gid_attr once it is added to it,
1252 * until than, limit itself to init_net.
1253 */
1254 dev_addr.net = &init_net;
114cc9c4 1255
0a514159
PP		 1256 if (!device->get_netdev)
1257 return -EOPNOTSUPP;
6d969a47 1258
0a514159
PP		 1259 rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid);
1260 rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid);
d98bb7f7 1261
0a514159
PP		 1262 /* validate the route */
1263 ret = rdma_resolve_ip_route(&sgid_addr._sockaddr,
1264 &dgid_addr._sockaddr, &dev_addr);
1265 if (ret)
1266 return ret;
1267
1268 if ((dev_addr.network == RDMA_NETWORK_IPV4 ||
1269 dev_addr.network == RDMA_NETWORK_IPV6) &&
1270 rec->rec_type != SA_PATH_REC_TYPE_ROCE_V2)
1271 return -EINVAL;
1272
1273 idev = device->get_netdev(device, port_num);
1274 if (!idev)
1275 return -ENODEV;
1276
1277 resolved_dev = dev_get_by_index(dev_addr.net,
1278 dev_addr.bound_dev_if);
1279 if (!resolved_dev) {
1280 ret = -ENODEV;
1281 goto done;
1282 }
0a514159 1283 rcu_read_lock();
39839107 1284 if (attr->ndev != resolved_dev ||
0a514159
PP		 1285 (resolved_dev != idev &&
1286 !rdma_is_upper_dev_rcu(idev, resolved_dev)))
1287 ret = -EHOSTUNREACH;
1288 rcu_read_unlock();
1289 dev_put(resolved_dev);
0a514159
PP		 1290done:
1291 dev_put(idev);
114cc9c4
PP		 1292 if (!ret)
1293 rec->roce.route_resolved = true;
0a514159
PP		 1294 return ret;
1295}
d98bb7f7 1296
0a514159
PP		 1297static int init_ah_attr_grh_fields(struct ib_device *device, u8 port_num,
1298 struct sa_path_rec *rec,
39839107
PP		 1299 struct rdma_ah_attr *ah_attr,
1300 const struct ib_gid_attr *gid_attr)
0a514159
PP		 1301{
1302 enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec);
3c86aa70 1303
39839107
PP		 1304 if (!gid_attr) {
1305 gid_attr = rdma_find_gid_by_port(device, &rec->sgid, type,
1306 port_num, NULL);
1307 if (IS_ERR(gid_attr))
1308 return PTR_ERR(gid_attr);
1309 } else
1310 rdma_hold_gid_attr(gid_attr);
20029832 1311
aa74f487
PP		 1312 rdma_move_grh_sgid_attr(ah_attr, &rec->dgid,
1313 be32_to_cpu(rec->flow_label),
1314 rec->hop_limit, rec->traffic_class,
1315 gid_attr);
0a514159
PP		 1316 return 0;
1317}
20029832 1318
39839107
PP		 1319/**
1320 * ib_init_ah_attr_from_path - Initialize address handle attributes based on
1321 * an SA path record.
1322 * @device: Device associated ah attributes initialization.
1323 * @port_num: Port on the specified device.
1324 * @rec: path record entry to use for ah attributes initialization.
1325 * @ah_attr: address handle attributes to initialization from path record.
1326 * @sgid_attr: SGID attribute to consider during initialization.
1327 *
1328 * When ib_init_ah_attr_from_path() returns success,
1329 * (a) for IB link layer it optionally contains a reference to SGID attribute
1330 * when GRH is present for IB link layer.
1331 * (b) for RoCE link layer it contains a reference to SGID attribute.
1332 * User must invoke rdma_destroy_ah_attr() to release reference to SGID
1333 * attributes which are initialized using ib_init_ah_attr_from_path().
1334 */
0a514159
PP		 1335int ib_init_ah_attr_from_path(struct ib_device *device, u8 port_num,
1336 struct sa_path_rec *rec,
39839107
PP		 1337 struct rdma_ah_attr *ah_attr,
1338 const struct ib_gid_attr *gid_attr)
0a514159
PP		 1339{
1340 int ret = 0;
ba36e37f 1341
0a514159
PP		 1342 memset(ah_attr, 0, sizeof(*ah_attr));
1343 ah_attr->type = rdma_ah_find_type(device, port_num);
1344 rdma_ah_set_sl(ah_attr, rec->sl);
1345 rdma_ah_set_port_num(ah_attr, port_num);
1346 rdma_ah_set_static_rate(ah_attr, rec->rate);
dfa834e1 1347
0a514159 1348 if (sa_path_is_roce(rec)) {
39839107
PP		 1349 ret = roce_resolve_route_from_path(device, port_num, rec,
1350 gid_attr);
0a514159 1351 if (ret)
6d969a47
SH		 1352 return ret;
1353
0a514159
PP		 1354 memcpy(ah_attr->roce.dmac, sa_path_get_dmac(rec), ETH_ALEN);
1355 } else {
1356 rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec)));
1357 if (sa_path_is_opa(rec) &&
1358 rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE))
1359 rdma_ah_set_make_grd(ah_attr, true);
1360
1361 rdma_ah_set_path_bits(ah_attr,
1362 be32_to_cpu(sa_path_get_slid(rec)) &
1363 get_src_path_mask(device, port_num));
9fdca4da 1364 }
20029832 1365
0a514159 1366 if (rec->hop_limit > 0 || sa_path_is_roce(rec))
39839107
PP		 1367 ret = init_ah_attr_grh_fields(device, port_num,
1368 rec, ah_attr, gid_attr);
0a514159 1369 return ret;
6d969a47 1370}
4ad6a024 1371EXPORT_SYMBOL(ib_init_ah_attr_from_path);
6d969a47 1372
2aec5c60
SH		 1373static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1374{
af808ece 1375 struct rdma_ah_attr ah_attr;
2aec5c60
SH		 1376 unsigned long flags;
1377
1378 spin_lock_irqsave(&query->port->ah_lock, flags);
164ba089
MS		 1379 if (!query->port->sm_ah) {
1380 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1381 return -EAGAIN;
1382 }
2aec5c60
SH		 1383 kref_get(&query->port->sm_ah->ref);
1384 query->sm_ah = query->port->sm_ah;
1385 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1386
af808ece
VSD		 1387 /*
1388 * Always check if sm_ah has valid dlid assigned,
1389 * before querying for class port info
1390 */
1391 if ((rdma_query_ah(query->sm_ah->ah, &ah_attr) < 0) ||
1392 !rdma_is_valid_unicast_lid(&ah_attr)) {
1393 kref_put(&query->sm_ah->ref, free_sm_ah);
1394 return -EAGAIN;
1395 }
2aec5c60
SH		 1396 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1397 query->sm_ah->pkey_index,
1398 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
da2dfaa3 1399 gfp_mask,
2196f271
DC		 1400 ((query->flags & IB_SA_QUERY_OPA) ?
1401 OPA_MGMT_BASE_VERSION :
1402 IB_MGMT_BASE_VERSION));
3c10c7c9 1403 if (IS_ERR(query->mad_buf)) {
2aec5c60
SH		 1404 kref_put(&query->sm_ah->ref, free_sm_ah);
1405 return -ENOMEM;
1406 }
1407
1408 query->mad_buf->ah = query->sm_ah->ah;
1409
1410 return 0;
1411}
1412
1413static void free_mad(struct ib_sa_query *query)
1414{
1415 ib_free_send_mad(query->mad_buf);
1416 kref_put(&query->sm_ah->ref, free_sm_ah);
1417}
1418
2196f271 1419static void init_mad(struct ib_sa_query *query, struct ib_mad_agent *agent)
1da177e4 1420{
2196f271 1421 struct ib_sa_mad *mad = query->mad_buf->mad;
1da177e4
LT		 1422 unsigned long flags;
1423
1424 memset(mad, 0, sizeof *mad);
1425
2196f271
DC		 1426 if (query->flags & IB_SA_QUERY_OPA) {
1427 mad->mad_hdr.base_version = OPA_MGMT_BASE_VERSION;
1428 mad->mad_hdr.class_version = OPA_SA_CLASS_VERSION;
1429 } else {
1430 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
1431 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1432 }
1da177e4 1433 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
1da177e4
LT		 1434 spin_lock_irqsave(&tid_lock, flags);
1435 mad->mad_hdr.tid =
1436 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1437 spin_unlock_irqrestore(&tid_lock, flags);
1438}
1439
e322fedf 1440static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
1da177e4 1441{
d0164adc 1442 bool preload = gfpflags_allow_blocking(gfp_mask);
1da177e4 1443 unsigned long flags;
34816ad9 1444 int ret, id;
1da177e4 1445
3b069c5d
TH		 1446 if (preload)
1447 idr_preload(gfp_mask);
1da177e4 1448 spin_lock_irqsave(&idr_lock, flags);
3b069c5d
TH		 1449
1450 id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
1451
1da177e4 1452 spin_unlock_irqrestore(&idr_lock, flags);
3b069c5d
TH		 1453 if (preload)
1454 idr_preload_end();
1455 if (id < 0)
1456 return id;
1da177e4 1457
34816ad9
SH		 1458 query->mad_buf->timeout_ms = timeout_ms;
1459 query->mad_buf->context[0] = query;
1460 query->id = id;
1da177e4 1461
4c33bd19
DC		 1462 if ((query->flags & IB_SA_ENABLE_LOCAL_SERVICE) &&
1463 (!(query->flags & IB_SA_QUERY_OPA))) {
ff61c425 1464 if (!rdma_nl_chk_listeners(RDMA_NL_GROUP_LS)) {
3ebd2fd0 1465 if (!ib_nl_make_request(query, gfp_mask))
2ca546b9
KW		 1466 return id;
1467 }
1468 ib_sa_disable_local_svc(query);
1469 }
1470
34816ad9 1471 ret = ib_post_send_mad(query->mad_buf, NULL);
1da177e4 1472 if (ret) {
1da177e4 1473 spin_lock_irqsave(&idr_lock, flags);
34816ad9 1474 idr_remove(&query_idr, id);
1da177e4
LT		 1475 spin_unlock_irqrestore(&idr_lock, flags);
1476 }
1477
dae4c1d2
RD		 1478 /*
1479 * It's not safe to dereference query any more, because the
1480 * send may already have completed and freed the query in
34816ad9 1481 * another context.
dae4c1d2 1482 */
34816ad9 1483 return ret ? ret : id;
1da177e4
LT		 1484}
1485
c2f8fc4e 1486void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec)
a7ca1f00
SH		 1487{
1488 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1489}
1490EXPORT_SYMBOL(ib_sa_unpack_path);
1491
c2f8fc4e 1492void ib_sa_pack_path(struct sa_path_rec *rec, void *attribute)
2e08b587
SH		 1493{
1494 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1495}
1496EXPORT_SYMBOL(ib_sa_pack_path);
1497
4c33bd19
DC		 1498static bool ib_sa_opa_pathrecord_support(struct ib_sa_client *client,
1499 struct ib_device *device,
1500 u8 port_num)
1501{
1502 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1503 struct ib_sa_port *port;
1504 unsigned long flags;
1505 bool ret = false;
1506
1507 if (!sa_dev)
1508 return ret;
1509
1510 port = &sa_dev->port[port_num - sa_dev->start_port];
1511 spin_lock_irqsave(&port->classport_lock, flags);
1512 if (!port->classport_info.valid)
1513 goto ret;
1514
1515 if (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_OPA)
1516 ret = opa_get_cpi_capmask2(&port->classport_info.data.opa) &
1517 OPA_CLASS_PORT_INFO_PR_SUPPORT;
1518ret:
1519 spin_unlock_irqrestore(&port->classport_lock, flags);
1520 return ret;
1521}
1522
1523enum opa_pr_supported {
1524 PR_NOT_SUPPORTED,
1525 PR_OPA_SUPPORTED,
1526 PR_IB_SUPPORTED
1527};
1528
1529/**
1530 * Check if current PR query can be an OPA query.
1531 * Retuns PR_NOT_SUPPORTED if a path record query is not
1532 * possible, PR_OPA_SUPPORTED if an OPA path record query
1533 * is possible and PR_IB_SUPPORTED if an IB path record
1534 * query is possible.
1535 */
1536static int opa_pr_query_possible(struct ib_sa_client *client,
1537 struct ib_device *device,
1538 u8 port_num,
1539 struct sa_path_rec *rec)
1540{
1541 struct ib_port_attr port_attr;
1542
1543 if (ib_query_port(device, port_num, &port_attr))
1544 return PR_NOT_SUPPORTED;
1545
1546 if (ib_sa_opa_pathrecord_support(client, device, port_num))
1547 return PR_OPA_SUPPORTED;
1548
1549 if (port_attr.lid >= be16_to_cpu(IB_MULTICAST_LID_BASE))
1550 return PR_NOT_SUPPORTED;
1551 else
1552 return PR_IB_SUPPORTED;
1553}
1554
1da177e4
LT		 1555static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1556 int status,
1557 struct ib_sa_mad *mad)
1558{
1559 struct ib_sa_path_query *query =
1560 container_of(sa_query, struct ib_sa_path_query, sa_query);
1561
1562 if (mad) {
c2f8fc4e 1563 struct sa_path_rec rec;
1da177e4 1564
4c33bd19
DC		 1565 if (sa_query->flags & IB_SA_QUERY_OPA) {
1566 ib_unpack(opa_path_rec_table,
1567 ARRAY_SIZE(opa_path_rec_table),
1568 mad->data, &rec);
1569 rec.rec_type = SA_PATH_REC_TYPE_OPA;
1570 query->callback(status, &rec, query->context);
1571 } else {
1572 ib_unpack(path_rec_table,
1573 ARRAY_SIZE(path_rec_table),
1574 mad->data, &rec);
1575 rec.rec_type = SA_PATH_REC_TYPE_IB;
4c33bd19
DC		 1576 sa_path_set_dmac_zero(&rec);
1577
1578 if (query->conv_pr) {
1579 struct sa_path_rec opa;
1580
1581 memset(&opa, 0, sizeof(struct sa_path_rec));
1582 sa_convert_path_ib_to_opa(&opa, &rec);
1583 query->callback(status, &opa, query->context);
1584 } else {
1585 query->callback(status, &rec, query->context);
1586 }
1587 }
1da177e4
LT		 1588 } else
1589 query->callback(status, NULL, query->context);
1590}
1591
1592static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1593{
4c33bd19
DC		 1594 struct ib_sa_path_query *query =
1595 container_of(sa_query, struct ib_sa_path_query, sa_query);
1596
1597 kfree(query->conv_pr);
1598 kfree(query);
1da177e4
LT		 1599}
1600
1601/**
1602 * ib_sa_path_rec_get - Start a Path get query
c1a0b23b 1603 * @client:SA client
1da177e4
LT		 1604 * @device:device to send query on
1605 * @port_num: port number to send query on
1606 * @rec:Path Record to send in query
1607 * @comp_mask:component mask to send in query
1608 * @timeout_ms:time to wait for response
1609 * @gfp_mask:GFP mask to use for internal allocations
1610 * @callback:function called when query completes, times out or is
1611 * canceled
1612 * @context:opaque user context passed to callback
1613 * @sa_query:query context, used to cancel query
1614 *
1615 * Send a Path Record Get query to the SA to look up a path. The
1616 * callback function will be called when the query completes (or
1617 * fails); status is 0 for a successful response, -EINTR if the query
1618 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1619 * occurred sending the query. The resp parameter of the callback is
1620 * only valid if status is 0.
1621 *
1622 * If the return value of ib_sa_path_rec_get() is negative, it is an
1623 * error code. Otherwise it is a query ID that can be used to cancel
1624 * the query.
1625 */
c1a0b23b
MT		 1626int ib_sa_path_rec_get(struct ib_sa_client *client,
1627 struct ib_device *device, u8 port_num,
c2f8fc4e 1628 struct sa_path_rec *rec,
1da177e4 1629 ib_sa_comp_mask comp_mask,
dd0fc66f 1630 int timeout_ms, gfp_t gfp_mask,
1da177e4 1631 void (*callback)(int status,
c2f8fc4e 1632 struct sa_path_rec *resp,
1da177e4
LT		 1633 void *context),
1634 void *context,
1635 struct ib_sa_query **sa_query)
1636{
1637 struct ib_sa_path_query *query;
1638 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
56c202d6
RD		 1639 struct ib_sa_port *port;
1640 struct ib_mad_agent *agent;
34816ad9 1641 struct ib_sa_mad *mad;
4c33bd19 1642 enum opa_pr_supported status;
1da177e4
LT		 1643 int ret;
1644
56c202d6
RD		 1645 if (!sa_dev)
1646 return -ENODEV;
1647
4c33bd19
DC		 1648 if ((rec->rec_type != SA_PATH_REC_TYPE_IB) &&
1649 (rec->rec_type != SA_PATH_REC_TYPE_OPA))
dfa834e1
DC		 1650 return -EINVAL;
1651
56c202d6
RD		 1652 port = &sa_dev->port[port_num - sa_dev->start_port];
1653 agent = port->agent;
1654
5d265770 1655 query = kzalloc(sizeof(*query), gfp_mask);
1da177e4
LT		 1656 if (!query)
1657 return -ENOMEM;
34816ad9 1658
2aec5c60 1659 query->sa_query.port = port;
4c33bd19
DC		 1660 if (rec->rec_type == SA_PATH_REC_TYPE_OPA) {
1661 status = opa_pr_query_possible(client, device, port_num, rec);
1662 if (status == PR_NOT_SUPPORTED) {
1663 ret = -EINVAL;
1664 goto err1;
1665 } else if (status == PR_OPA_SUPPORTED) {
1666 query->sa_query.flags |= IB_SA_QUERY_OPA;
1667 } else {
1668 query->conv_pr =
1669 kmalloc(sizeof(*query->conv_pr), gfp_mask);
1670 if (!query->conv_pr) {
1671 ret = -ENOMEM;
1672 goto err1;
1673 }
1674 }
1675 }
1676
2aec5c60
SH		 1677 ret = alloc_mad(&query->sa_query, gfp_mask);
1678 if (ret)
4c33bd19 1679 goto err2;
1da177e4 1680
c1a0b23b
MT		 1681 ib_sa_client_get(client);
1682 query->sa_query.client = client;
1683 query->callback = callback;
1684 query->context = context;
1da177e4 1685
34816ad9 1686 mad = query->sa_query.mad_buf->mad;
2196f271 1687 init_mad(&query->sa_query, agent);
1da177e4 1688
34816ad9
SH		 1689 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1690 query->sa_query.release = ib_sa_path_rec_release;
34816ad9
SH		 1691 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1692 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1693 mad->sa_hdr.comp_mask = comp_mask;
1da177e4 1694
4c33bd19
DC		 1695 if (query->sa_query.flags & IB_SA_QUERY_OPA) {
1696 ib_pack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table),
1697 rec, mad->data);
1698 } else if (query->conv_pr) {
1699 sa_convert_path_opa_to_ib(query->conv_pr, rec);
1700 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1701 query->conv_pr, mad->data);
1702 } else {
1703 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1704 rec, mad->data);
1705 }
1da177e4
LT		 1706
1707 *sa_query = &query->sa_query;
dae4c1d2 1708
2ca546b9 1709 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
4c33bd19
DC		 1710 query->sa_query.mad_buf->context[1] = (query->conv_pr) ?
1711 query->conv_pr : rec;
2ca546b9 1712
e322fedf 1713 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
34816ad9 1714 if (ret < 0)
4c33bd19 1715 goto err3;
34816ad9
SH		 1716
1717 return ret;
1718
4c33bd19 1719err3:
34816ad9 1720 *sa_query = NULL;
c1a0b23b 1721 ib_sa_client_put(query->sa_query.client);
2aec5c60 1722 free_mad(&query->sa_query);
4c33bd19
DC		 1723err2:
1724 kfree(query->conv_pr);
34816ad9
SH		 1725err1:
1726 kfree(query);
dae4c1d2 1727 return ret;
1da177e4
LT		 1728}
1729EXPORT_SYMBOL(ib_sa_path_rec_get);
1730
cbae32c5
HR		 1731static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1732 int status,
1733 struct ib_sa_mad *mad)
1734{
1735 struct ib_sa_service_query *query =
1736 container_of(sa_query, struct ib_sa_service_query, sa_query);
1737
1738 if (mad) {
1739 struct ib_sa_service_rec rec;
1740
1741 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1742 mad->data, &rec);
1743 query->callback(status, &rec, query->context);
1744 } else
1745 query->callback(status, NULL, query->context);
1746}
1747
1748static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1749{
cbae32c5
HR		 1750 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1751}
1752
1753/**
1754 * ib_sa_service_rec_query - Start Service Record operation
c1a0b23b 1755 * @client:SA client
cbae32c5
HR		 1756 * @device:device to send request on
1757 * @port_num: port number to send request on
1758 * @method:SA method - should be get, set, or delete
1759 * @rec:Service Record to send in request
1760 * @comp_mask:component mask to send in request
1761 * @timeout_ms:time to wait for response
1762 * @gfp_mask:GFP mask to use for internal allocations
1763 * @callback:function called when request completes, times out or is
1764 * canceled
1765 * @context:opaque user context passed to callback
1766 * @sa_query:request context, used to cancel request
1767 *
1768 * Send a Service Record set/get/delete to the SA to register,
1769 * unregister or query a service record.
1770 * The callback function will be called when the request completes (or
1771 * fails); status is 0 for a successful response, -EINTR if the query
1772 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1773 * occurred sending the query. The resp parameter of the callback is
1774 * only valid if status is 0.
1775 *
1776 * If the return value of ib_sa_service_rec_query() is negative, it is an
1777 * error code. Otherwise it is a request ID that can be used to cancel
1778 * the query.
1779 */
c1a0b23b
MT		 1780int ib_sa_service_rec_query(struct ib_sa_client *client,
1781 struct ib_device *device, u8 port_num, u8 method,
cbae32c5
HR		 1782 struct ib_sa_service_rec *rec,
1783 ib_sa_comp_mask comp_mask,
dd0fc66f 1784 int timeout_ms, gfp_t gfp_mask,
cbae32c5
HR		 1785 void (*callback)(int status,
1786 struct ib_sa_service_rec *resp,
1787 void *context),
1788 void *context,
1789 struct ib_sa_query **sa_query)
1790{
1791 struct ib_sa_service_query *query;
1792 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
56c202d6
RD		 1793 struct ib_sa_port *port;
1794 struct ib_mad_agent *agent;
34816ad9 1795 struct ib_sa_mad *mad;
cbae32c5
HR		 1796 int ret;
1797
56c202d6
RD		 1798 if (!sa_dev)
1799 return -ENODEV;
1800
1801 port = &sa_dev->port[port_num - sa_dev->start_port];
1802 agent = port->agent;
1803
cbae32c5
HR		 1804 if (method != IB_MGMT_METHOD_GET &&
1805 method != IB_MGMT_METHOD_SET &&
1806 method != IB_SA_METHOD_DELETE)
1807 return -EINVAL;
1808
5d265770 1809 query = kzalloc(sizeof(*query), gfp_mask);
cbae32c5
HR		 1810 if (!query)
1811 return -ENOMEM;
34816ad9 1812
2aec5c60
SH		 1813 query->sa_query.port = port;
1814 ret = alloc_mad(&query->sa_query, gfp_mask);
1815 if (ret)
34816ad9 1816 goto err1;
cbae32c5 1817
c1a0b23b
MT		 1818 ib_sa_client_get(client);
1819 query->sa_query.client = client;
1820 query->callback = callback;
1821 query->context = context;
cbae32c5 1822
34816ad9 1823 mad = query->sa_query.mad_buf->mad;
2196f271 1824 init_mad(&query->sa_query, agent);
cbae32c5 1825
34816ad9
SH		 1826 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1827 query->sa_query.release = ib_sa_service_rec_release;
34816ad9
SH		 1828 mad->mad_hdr.method = method;
1829 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1830 mad->sa_hdr.comp_mask = comp_mask;
cbae32c5
HR		 1831
1832 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
34816ad9 1833 rec, mad->data);
cbae32c5
HR		 1834
1835 *sa_query = &query->sa_query;
1836
e322fedf 1837 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
34816ad9
SH		 1838 if (ret < 0)
1839 goto err2;
1840
1841 return ret;
cbae32c5 1842
34816ad9
SH		 1843err2:
1844 *sa_query = NULL;
c1a0b23b 1845 ib_sa_client_put(query->sa_query.client);
2aec5c60 1846 free_mad(&query->sa_query);
34816ad9
SH		 1847
1848err1:
1849 kfree(query);
cbae32c5
HR		 1850 return ret;
1851}
1852EXPORT_SYMBOL(ib_sa_service_rec_query);
1853
1da177e4
LT		 1854static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1855 int status,
1856 struct ib_sa_mad *mad)
1857{
1858 struct ib_sa_mcmember_query *query =
1859 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1860
1861 if (mad) {
1862 struct ib_sa_mcmember_rec rec;
1863
1864 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1865 mad->data, &rec);
1866 query->callback(status, &rec, query->context);
1867 } else
1868 query->callback(status, NULL, query->context);
1869}
1870
1871static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1872{
1da177e4
LT		 1873 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1874}
1875
c1a0b23b
MT		 1876int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1877 struct ib_device *device, u8 port_num,
1da177e4
LT		 1878 u8 method,
1879 struct ib_sa_mcmember_rec *rec,
1880 ib_sa_comp_mask comp_mask,
dd0fc66f 1881 int timeout_ms, gfp_t gfp_mask,
1da177e4
LT		 1882 void (*callback)(int status,
1883 struct ib_sa_mcmember_rec *resp,
1884 void *context),
1885 void *context,
1886 struct ib_sa_query **sa_query)
1887{
1888 struct ib_sa_mcmember_query *query;
1889 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
56c202d6
RD		 1890 struct ib_sa_port *port;
1891 struct ib_mad_agent *agent;
34816ad9 1892 struct ib_sa_mad *mad;
1da177e4
LT		 1893 int ret;
1894
56c202d6
RD		 1895 if (!sa_dev)
1896 return -ENODEV;
1897
1898 port = &sa_dev->port[port_num - sa_dev->start_port];
1899 agent = port->agent;
1900
5d265770 1901 query = kzalloc(sizeof(*query), gfp_mask);
1da177e4
LT		 1902 if (!query)
1903 return -ENOMEM;
34816ad9 1904
2aec5c60
SH		 1905 query->sa_query.port = port;
1906 ret = alloc_mad(&query->sa_query, gfp_mask);
1907 if (ret)
34816ad9 1908 goto err1;
1da177e4 1909
c1a0b23b
MT		 1910 ib_sa_client_get(client);
1911 query->sa_query.client = client;
1912 query->callback = callback;
1913 query->context = context;
1da177e4 1914
34816ad9 1915 mad = query->sa_query.mad_buf->mad;
2196f271 1916 init_mad(&query->sa_query, agent);
1da177e4 1917
34816ad9
SH		 1918 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1919 query->sa_query.release = ib_sa_mcmember_rec_release;
34816ad9
SH		 1920 mad->mad_hdr.method = method;
1921 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1922 mad->sa_hdr.comp_mask = comp_mask;
1da177e4
LT		 1923
1924 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
34816ad9 1925 rec, mad->data);
1da177e4
LT		 1926
1927 *sa_query = &query->sa_query;
dae4c1d2 1928
e322fedf 1929 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
34816ad9
SH		 1930 if (ret < 0)
1931 goto err2;
1da177e4 1932
dae4c1d2 1933 return ret;
34816ad9
SH		 1934
1935err2:
1936 *sa_query = NULL;
c1a0b23b 1937 ib_sa_client_put(query->sa_query.client);
2aec5c60 1938 free_mad(&query->sa_query);
34816ad9
SH		 1939
1940err1:
1941 kfree(query);
1942 return ret;
1da177e4 1943}
1da177e4 1944
aeab97ed
ES		 1945/* Support GuidInfoRecord */
1946static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1947 int status,
1948 struct ib_sa_mad *mad)
1949{
1950 struct ib_sa_guidinfo_query *query =
1951 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1952
1953 if (mad) {
1954 struct ib_sa_guidinfo_rec rec;
1955
1956 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1957 mad->data, &rec);
1958 query->callback(status, &rec, query->context);
1959 } else
1960 query->callback(status, NULL, query->context);
1961}
1962
1963static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1964{
1965 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1966}
1967
1968int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1969 struct ib_device *device, u8 port_num,
1970 struct ib_sa_guidinfo_rec *rec,
1971 ib_sa_comp_mask comp_mask, u8 method,
1972 int timeout_ms, gfp_t gfp_mask,
1973 void (*callback)(int status,
1974 struct ib_sa_guidinfo_rec *resp,
1975 void *context),
1976 void *context,
1977 struct ib_sa_query **sa_query)
1978{
1979 struct ib_sa_guidinfo_query *query;
1980 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1981 struct ib_sa_port *port;
1982 struct ib_mad_agent *agent;
1983 struct ib_sa_mad *mad;
1984 int ret;
1985
1986 if (!sa_dev)
1987 return -ENODEV;
1988
1989 if (method != IB_MGMT_METHOD_GET &&
1990 method != IB_MGMT_METHOD_SET &&
1991 method != IB_SA_METHOD_DELETE) {
1992 return -EINVAL;
1993 }
1994
1995 port = &sa_dev->port[port_num - sa_dev->start_port];
1996 agent = port->agent;
1997
5d265770 1998 query = kzalloc(sizeof(*query), gfp_mask);
aeab97ed
ES		 1999 if (!query)
2000 return -ENOMEM;
2001
2002 query->sa_query.port = port;
2003 ret = alloc_mad(&query->sa_query, gfp_mask);
2004 if (ret)
2005 goto err1;
2006
2007 ib_sa_client_get(client);
2008 query->sa_query.client = client;
2009 query->callback = callback;
2010 query->context = context;
2011
2012 mad = query->sa_query.mad_buf->mad;
2196f271 2013 init_mad(&query->sa_query, agent);
aeab97ed
ES		 2014
2015 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
2016 query->sa_query.release = ib_sa_guidinfo_rec_release;
2017
2018 mad->mad_hdr.method = method;
2019 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
2020 mad->sa_hdr.comp_mask = comp_mask;
2021
2022 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
2023 mad->data);
2024
2025 *sa_query = &query->sa_query;
2026
2027 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
2028 if (ret < 0)
2029 goto err2;
2030
2031 return ret;
2032
2033err2:
2034 *sa_query = NULL;
2035 ib_sa_client_put(query->sa_query.client);
2036 free_mad(&query->sa_query);
2037
2038err1:
2039 kfree(query);
2040 return ret;
2041}
2042EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
2043
ee1c60b1
DC		 2044bool ib_sa_sendonly_fullmem_support(struct ib_sa_client *client,
2045 struct ib_device *device,
2046 u8 port_num)
2047{
2048 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
2049 struct ib_sa_port *port;
2050 bool ret = false;
2051 unsigned long flags;
2052
2053 if (!sa_dev)
2054 return ret;
2055
2056 port = &sa_dev->port[port_num - sa_dev->start_port];
2057
2058 spin_lock_irqsave(&port->classport_lock, flags);
2196f271
DC		 2059 if ((port->classport_info.valid) &&
2060 (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_IB))
2061 ret = ib_get_cpi_capmask2(&port->classport_info.data.ib)
2062 & IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT;
ee1c60b1
DC		 2063 spin_unlock_irqrestore(&port->classport_lock, flags);
2064 return ret;
2065}
2066EXPORT_SYMBOL(ib_sa_sendonly_fullmem_support);
2067
2068struct ib_classport_info_context {
2069 struct completion done;
2070 struct ib_sa_query *sa_query;
2071};
2072
2073static void ib_classportinfo_cb(void *context)
2074{
2075 struct ib_classport_info_context *cb_ctx = context;
2076
2077 complete(&cb_ctx->done);
2078}
2079
628e6f75
ES		 2080static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
2081 int status,
2082 struct ib_sa_mad *mad)
2083{
3d3fd742 2084 unsigned long flags;
628e6f75
ES		 2085 struct ib_sa_classport_info_query *query =
2086 container_of(sa_query, struct ib_sa_classport_info_query, sa_query);
2196f271 2087 struct ib_sa_classport_cache *info = &sa_query->port->classport_info;
628e6f75
ES		 2088
2089 if (mad) {
2196f271
DC		 2090 if (sa_query->flags & IB_SA_QUERY_OPA) {
2091 struct opa_class_port_info rec;
628e6f75 2092
2196f271
DC		 2093 ib_unpack(opa_classport_info_rec_table,
2094 ARRAY_SIZE(opa_classport_info_rec_table),
2095 mad->data, &rec);
2096
2097 spin_lock_irqsave(&sa_query->port->classport_lock,
2098 flags);
2099 if (!status && !info->valid) {
2100 memcpy(&info->data.opa, &rec,
2101 sizeof(info->data.opa));
2102
2103 info->valid = true;
2104 info->data.type = RDMA_CLASS_PORT_INFO_OPA;
2105 }
2106 spin_unlock_irqrestore(&sa_query->port->classport_lock,
2107 flags);
2108
2109 } else {
2110 struct ib_class_port_info rec;
3d3fd742 2111
2196f271
DC		 2112 ib_unpack(ib_classport_info_rec_table,
2113 ARRAY_SIZE(ib_classport_info_rec_table),
2114 mad->data, &rec);
3d3fd742 2115
2196f271
DC		 2116 spin_lock_irqsave(&sa_query->port->classport_lock,
2117 flags);
2118 if (!status && !info->valid) {
2119 memcpy(&info->data.ib, &rec,
2120 sizeof(info->data.ib));
2121
2122 info->valid = true;
2123 info->data.type = RDMA_CLASS_PORT_INFO_IB;
2124 }
2125 spin_unlock_irqrestore(&sa_query->port->classport_lock,
2126 flags);
3d3fd742 2127 }
628e6f75 2128 }
ee1c60b1 2129 query->callback(query->context);
628e6f75
ES		 2130}
2131
ee1c60b1 2132static void ib_sa_classport_info_rec_release(struct ib_sa_query *sa_query)
628e6f75
ES		 2133{
2134 kfree(container_of(sa_query, struct ib_sa_classport_info_query,
2135 sa_query));
2136}
2137
ee1c60b1
DC		 2138static int ib_sa_classport_info_rec_query(struct ib_sa_port *port,
2139 int timeout_ms,
2140 void (*callback)(void *context),
2141 void *context,
2142 struct ib_sa_query **sa_query)
628e6f75 2143{
628e6f75 2144 struct ib_mad_agent *agent;
ee1c60b1 2145 struct ib_sa_classport_info_query *query;
628e6f75 2146 struct ib_sa_mad *mad;
ee1c60b1 2147 gfp_t gfp_mask = GFP_KERNEL;
628e6f75
ES		 2148 int ret;
2149
628e6f75
ES		 2150 agent = port->agent;
2151
2152 query = kzalloc(sizeof(*query), gfp_mask);
2153 if (!query)
2154 return -ENOMEM;
2155
2156 query->sa_query.port = port;
2196f271
DC		 2157 query->sa_query.flags |= rdma_cap_opa_ah(port->agent->device,
2158 port->port_num) ?
2159 IB_SA_QUERY_OPA : 0;
628e6f75
ES		 2160 ret = alloc_mad(&query->sa_query, gfp_mask);
2161 if (ret)
ee1c60b1 2162 goto err_free;
628e6f75 2163
ee1c60b1
DC		 2164 query->callback = callback;
2165 query->context = context;
628e6f75
ES		 2166
2167 mad = query->sa_query.mad_buf->mad;
2196f271 2168 init_mad(&query->sa_query, agent);
628e6f75 2169
ee1c60b1
DC		 2170 query->sa_query.callback = ib_sa_classport_info_rec_callback;
2171 query->sa_query.release = ib_sa_classport_info_rec_release;
628e6f75
ES		 2172 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
2173 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO);
2174 mad->sa_hdr.comp_mask = 0;
2175 *sa_query = &query->sa_query;
2176
2177 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
2178 if (ret < 0)
ee1c60b1 2179 goto err_free_mad;
628e6f75
ES		 2180
2181 return ret;
2182
ee1c60b1 2183err_free_mad:
628e6f75 2184 *sa_query = NULL;
628e6f75
ES		 2185 free_mad(&query->sa_query);
2186
ee1c60b1 2187err_free:
628e6f75
ES		 2188 kfree(query);
2189 return ret;
2190}
ee1c60b1
DC		 2191
2192static void update_ib_cpi(struct work_struct *work)
2193{
2194 struct ib_sa_port *port =
2195 container_of(work, struct ib_sa_port, ib_cpi_work.work);
2196 struct ib_classport_info_context *cb_context;
2197 unsigned long flags;
2198 int ret;
2199
2200 /* If the classport info is valid, nothing
2201 * to do here.
2202 */
2203 spin_lock_irqsave(&port->classport_lock, flags);
2204 if (port->classport_info.valid) {
2205 spin_unlock_irqrestore(&port->classport_lock, flags);
2206 return;
2207 }
2208 spin_unlock_irqrestore(&port->classport_lock, flags);
2209
2210 cb_context = kmalloc(sizeof(*cb_context), GFP_KERNEL);
2211 if (!cb_context)
2212 goto err_nomem;
2213
2214 init_completion(&cb_context->done);
2215
2216 ret = ib_sa_classport_info_rec_query(port, 3000,
2217 ib_classportinfo_cb, cb_context,
2218 &cb_context->sa_query);
2219 if (ret < 0)
2220 goto free_cb_err;
2221 wait_for_completion(&cb_context->done);
2222free_cb_err:
2223 kfree(cb_context);
2224 spin_lock_irqsave(&port->classport_lock, flags);
2225
2226 /* If the classport info is still not valid, the query should have
2227 * failed for some reason. Retry issuing the query
2228 */
2229 if (!port->classport_info.valid) {
2230 port->classport_info.retry_cnt++;
2231 if (port->classport_info.retry_cnt <=
2232 IB_SA_CPI_MAX_RETRY_CNT) {
2233 unsigned long delay =
2234 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2235
2236 queue_delayed_work(ib_wq, &port->ib_cpi_work, delay);
2237 }
2238 }
2239 spin_unlock_irqrestore(&port->classport_lock, flags);
2240
2241err_nomem:
2242 return;
2243}
628e6f75 2244
1da177e4
LT		 2245static void send_handler(struct ib_mad_agent *agent,
2246 struct ib_mad_send_wc *mad_send_wc)
2247{
34816ad9 2248 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
1da177e4
LT		 2249 unsigned long flags;
2250
e4f50f00
RD		 2251 if (query->callback)
2252 switch (mad_send_wc->status) {
2253 case IB_WC_SUCCESS:
2254 /* No callback -- already got recv */
2255 break;
2256 case IB_WC_RESP_TIMEOUT_ERR:
2257 query->callback(query, -ETIMEDOUT, NULL);
2258 break;
2259 case IB_WC_WR_FLUSH_ERR:
2260 query->callback(query, -EINTR, NULL);
2261 break;
2262 default:
2263 query->callback(query, -EIO, NULL);
2264 break;
2265 }
1da177e4 2266
1da177e4 2267 spin_lock_irqsave(&idr_lock, flags);
34816ad9 2268 idr_remove(&query_idr, query->id);
1da177e4 2269 spin_unlock_irqrestore(&idr_lock, flags);
34816ad9 2270
2aec5c60 2271 free_mad(query);
ee1c60b1
DC		 2272 if (query->client)
2273 ib_sa_client_put(query->client);
34816ad9 2274 query->release(query);
1da177e4
LT		 2275}
2276
2277static void recv_handler(struct ib_mad_agent *mad_agent,
ca281265 2278 struct ib_mad_send_buf *send_buf,
1da177e4
LT		 2279 struct ib_mad_recv_wc *mad_recv_wc)
2280{
2281 struct ib_sa_query *query;
1da177e4 2282
ca281265
CH		 2283 if (!send_buf)
2284 return;
1da177e4 2285
ca281265 2286 query = send_buf->context[0];
34816ad9 2287 if (query->callback) {
1da177e4
LT		 2288 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
2289 query->callback(query,
2290 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
2291 -EINVAL : 0,
2292 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
2293 else
2294 query->callback(query, -EIO, NULL);
2295 }
2296
2297 ib_free_recv_mad(mad_recv_wc);
2298}
2299
cb863766
DC		 2300static void update_sm_ah(struct work_struct *work)
2301{
2302 struct ib_sa_port *port =
2303 container_of(work, struct ib_sa_port, update_task);
2304 struct ib_sa_sm_ah *new_ah;
2305 struct ib_port_attr port_attr;
90898850 2306 struct rdma_ah_attr ah_attr;
cb863766
DC		 2307
2308 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
2309 pr_warn("Couldn't query port\n");
2310 return;
2311 }
2312
2313 new_ah = kmalloc(sizeof(*new_ah), GFP_KERNEL);
2314 if (!new_ah)
2315 return;
2316
2317 kref_init(&new_ah->ref);
2318 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
2319
2320 new_ah->pkey_index = 0;
2321 if (ib_find_pkey(port->agent->device, port->port_num,
2322 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
2323 pr_err("Couldn't find index for default PKey\n");
2324
2325 memset(&ah_attr, 0, sizeof(ah_attr));
44c58487
DC		 2326 ah_attr.type = rdma_ah_find_type(port->agent->device,
2327 port->port_num);
d8966fcd
DC		 2328 rdma_ah_set_dlid(&ah_attr, port_attr.sm_lid);
2329 rdma_ah_set_sl(&ah_attr, port_attr.sm_sl);
2330 rdma_ah_set_port_num(&ah_attr, port->port_num);
cb863766 2331 if (port_attr.grh_required) {
d98bb7f7
DH		 2332 if (ah_attr.type == RDMA_AH_ATTR_TYPE_OPA) {
2333 rdma_ah_set_make_grd(&ah_attr, true);
2334 } else {
2335 rdma_ah_set_ah_flags(&ah_attr, IB_AH_GRH);
2336 rdma_ah_set_subnet_prefix(&ah_attr,
2337 cpu_to_be64(port_attr.subnet_prefix));
2338 rdma_ah_set_interface_id(&ah_attr,
2339 cpu_to_be64(IB_SA_WELL_KNOWN_GUID));
2340 }
cb863766
DC		 2341 }
2342
0a18cfe4 2343 new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr);
cb863766
DC		 2344 if (IS_ERR(new_ah->ah)) {
2345 pr_warn("Couldn't create new SM AH\n");
2346 kfree(new_ah);
2347 return;
2348 }
2349
2350 spin_lock_irq(&port->ah_lock);
2351 if (port->sm_ah)
2352 kref_put(&port->sm_ah->ref, free_sm_ah);
2353 port->sm_ah = new_ah;
2354 spin_unlock_irq(&port->ah_lock);
2355}
2356
2357static void ib_sa_event(struct ib_event_handler *handler,
2358 struct ib_event *event)
2359{
2360 if (event->event == IB_EVENT_PORT_ERR ||
2361 event->event == IB_EVENT_PORT_ACTIVE ||
2362 event->event == IB_EVENT_LID_CHANGE ||
2363 event->event == IB_EVENT_PKEY_CHANGE ||
2364 event->event == IB_EVENT_SM_CHANGE ||
2365 event->event == IB_EVENT_CLIENT_REREGISTER) {
2366 unsigned long flags;
2367 struct ib_sa_device *sa_dev =
2368 container_of(handler, typeof(*sa_dev), event_handler);
2369 u8 port_num = event->element.port_num - sa_dev->start_port;
2370 struct ib_sa_port *port = &sa_dev->port[port_num];
2371
2372 if (!rdma_cap_ib_sa(handler->device, port->port_num))
2373 return;
2374
2375 spin_lock_irqsave(&port->ah_lock, flags);
2376 if (port->sm_ah)
2377 kref_put(&port->sm_ah->ref, free_sm_ah);
2378 port->sm_ah = NULL;
2379 spin_unlock_irqrestore(&port->ah_lock, flags);
2380
2381 if (event->event == IB_EVENT_SM_CHANGE ||
2382 event->event == IB_EVENT_CLIENT_REREGISTER ||
ee1c60b1
DC		 2383 event->event == IB_EVENT_LID_CHANGE ||
2384 event->event == IB_EVENT_PORT_ACTIVE) {
2385 unsigned long delay =
2386 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2387
cb863766
DC		 2388 spin_lock_irqsave(&port->classport_lock, flags);
2389 port->classport_info.valid = false;
ee1c60b1 2390 port->classport_info.retry_cnt = 0;
cb863766 2391 spin_unlock_irqrestore(&port->classport_lock, flags);
ee1c60b1
DC		 2392 queue_delayed_work(ib_wq,
2393 &port->ib_cpi_work, delay);
cb863766
DC		 2394 }
2395 queue_work(ib_wq, &sa_dev->port[port_num].update_task);
2396 }
2397}
2398
1da177e4
LT		 2399static void ib_sa_add_one(struct ib_device *device)
2400{
2401 struct ib_sa_device *sa_dev;
2402 int s, e, i;
08e3681a 2403 int count = 0;
07ebafba 2404
4139032b
HR		 2405 s = rdma_start_port(device);
2406 e = rdma_end_port(device);
1da177e4 2407
fac70d51 2408 sa_dev = kzalloc(sizeof *sa_dev +
1da177e4
LT		 2409 (e - s + 1) * sizeof (struct ib_sa_port),
2410 GFP_KERNEL);
2411 if (!sa_dev)
2412 return;
2413
2414 sa_dev->start_port = s;
2415 sa_dev->end_port = e;
2416
2417 for (i = 0; i <= e - s; ++i) {
fac70d51 2418 spin_lock_init(&sa_dev->port[i].ah_lock);
fe53ba2f 2419 if (!rdma_cap_ib_sa(device, i + 1))
fac70d51
EC		 2420 continue;
2421
1da177e4
LT		 2422 sa_dev->port[i].sm_ah = NULL;
2423 sa_dev->port[i].port_num = i + s;
1da177e4 2424
3d3fd742
AV		 2425 spin_lock_init(&sa_dev->port[i].classport_lock);
2426 sa_dev->port[i].classport_info.valid = false;
2427
1da177e4
LT		 2428 sa_dev->port[i].agent =
2429 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
2430 NULL, 0, send_handler,
0f29b46d 2431 recv_handler, sa_dev, 0);
1da177e4
LT		 2432 if (IS_ERR(sa_dev->port[i].agent))
2433 goto err;
2434
c4028958 2435 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
ee1c60b1
DC		 2436 INIT_DELAYED_WORK(&sa_dev->port[i].ib_cpi_work,
2437 update_ib_cpi);
08e3681a
MW		 2438
2439 count++;
1da177e4
LT		 2440 }
2441
08e3681a
MW		 2442 if (!count)
2443 goto free;
2444
1da177e4
LT		 2445 ib_set_client_data(device, &sa_client, sa_dev);
2446
2447 /*
2448 * We register our event handler after everything is set up,
2449 * and then update our cached info after the event handler is
2450 * registered to avoid any problems if a port changes state
2451 * during our initialization.
2452 */
2453
2454 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
dcc9881e 2455 ib_register_event_handler(&sa_dev->event_handler);
1da177e4 2456
08e3681a 2457 for (i = 0; i <= e - s; ++i) {
fe53ba2f 2458 if (rdma_cap_ib_sa(device, i + 1))
fac70d51 2459 update_sm_ah(&sa_dev->port[i].update_task);
08e3681a 2460 }
1da177e4
LT		 2461
2462 return;
2463
2464err:
08e3681a 2465 while (--i >= 0) {
fe53ba2f 2466 if (rdma_cap_ib_sa(device, i + 1))
fac70d51 2467 ib_unregister_mad_agent(sa_dev->port[i].agent);
08e3681a
MW		 2468 }
2469free:
1da177e4 2470 kfree(sa_dev);
1da177e4
LT		 2471 return;
2472}
2473
7c1eb45a 2474static void ib_sa_remove_one(struct ib_device *device, void *client_data)
1da177e4 2475{
7c1eb45a 2476 struct ib_sa_device *sa_dev = client_data;
1da177e4
LT		 2477 int i;
2478
2479 if (!sa_dev)
2480 return;
2481
2482 ib_unregister_event_handler(&sa_dev->event_handler);
96e61fa5 2483 flush_workqueue(ib_wq);
0f47ae0b 2484
1da177e4 2485 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
fe53ba2f 2486 if (rdma_cap_ib_sa(device, i + 1)) {
ee1c60b1 2487 cancel_delayed_work_sync(&sa_dev->port[i].ib_cpi_work);
fac70d51
EC		 2488 ib_unregister_mad_agent(sa_dev->port[i].agent);
2489 if (sa_dev->port[i].sm_ah)
2490 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
2491 }
2492
1da177e4
LT		 2493 }
2494
2495 kfree(sa_dev);
2496}
2497
c2e49c92 2498int ib_sa_init(void)
1da177e4
LT		 2499{
2500 int ret;
2501
1da177e4
LT		 2502 get_random_bytes(&tid, sizeof tid);
2503
2ca546b9
KW		 2504 atomic_set(&ib_nl_sa_request_seq, 0);
2505
1da177e4 2506 ret = ib_register_client(&sa_client);
faec2f7b 2507 if (ret) {
aba25a3e 2508 pr_err("Couldn't register ib_sa client\n");
faec2f7b
SH		 2509 goto err1;
2510 }
2511
2512 ret = mcast_init();
2513 if (ret) {
aba25a3e 2514 pr_err("Couldn't initialize multicast handling\n");
faec2f7b
SH		 2515 goto err2;
2516 }
1da177e4 2517
4534d859 2518 ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM);
2ca546b9
KW		 2519 if (!ib_nl_wq) {
2520 ret = -ENOMEM;
2521 goto err3;
2522 }
2523
2ca546b9
KW		 2524 INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
2525
faec2f7b 2526 return 0;
735c631a 2527
2ca546b9
KW		 2528err3:
2529 mcast_cleanup();
faec2f7b
SH		 2530err2:
2531 ib_unregister_client(&sa_client);
2532err1:
1da177e4
LT		 2533 return ret;
2534}
2535
c2e49c92 2536void ib_sa_cleanup(void)
1da177e4 2537{
2ca546b9
KW		 2538 cancel_delayed_work(&ib_nl_timed_work);
2539 flush_workqueue(ib_nl_wq);
2540 destroy_workqueue(ib_nl_wq);
faec2f7b 2541 mcast_cleanup();
1da177e4 2542 ib_unregister_client(&sa_client);
5d7edb3c 2543 idr_destroy(&query_idr);
1da177e4 2544}
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