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/xarray.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 <rdma/opa_addr.h>
54 #include "sa.h"
55 #include "core_priv.h"
56
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
60 #define IB_SA_CPI_MAX_RETRY_CNT 3
61 #define IB_SA_CPI_RETRY_WAIT 1000 /*msecs */
62 static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT;
63
64 struct ib_sa_sm_ah {
65 struct ib_ah *ah;
66 struct kref ref;
67 u16 pkey_index;
68 u8 src_path_mask;
69 };
70
71 enum rdma_class_port_info_type {
72 RDMA_CLASS_PORT_INFO_IB,
73 RDMA_CLASS_PORT_INFO_OPA
74 };
75
76 struct 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
84 struct ib_sa_classport_cache {
85 bool valid;
86 int retry_cnt;
87 struct rdma_class_port_info data;
88 };
89
90 struct ib_sa_port {
91 struct ib_mad_agent *agent;
92 struct ib_sa_sm_ah *sm_ah;
93 struct work_struct update_task;
94 struct ib_sa_classport_cache classport_info;
95 struct delayed_work ib_cpi_work;
96 spinlock_t classport_lock; /* protects class port info set */
97 spinlock_t ah_lock;
98 u32 port_num;
99 };
100
101 struct ib_sa_device {
102 int start_port, end_port;
103 struct ib_event_handler event_handler;
104 struct ib_sa_port port[];
105 };
106
107 struct ib_sa_query {
108 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
109 void (*release)(struct ib_sa_query *);
110 struct ib_sa_client *client;
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;
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 */
120 };
121
122 #define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001
123 #define IB_SA_CANCEL 0x00000002
124 #define IB_SA_QUERY_OPA 0x00000004
125
126 struct ib_sa_path_query {
127 void (*callback)(int, struct sa_path_rec *, void *);
128 void *context;
129 struct ib_sa_query sa_query;
130 struct sa_path_rec *conv_pr;
131 };
132
133 struct ib_sa_guidinfo_query {
134 void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
135 void *context;
136 struct ib_sa_query sa_query;
137 };
138
139 struct ib_sa_classport_info_query {
140 void (*callback)(void *);
141 void *context;
142 struct ib_sa_query sa_query;
143 };
144
145 struct ib_sa_mcmember_query {
146 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
147 void *context;
148 struct ib_sa_query sa_query;
149 };
150
151 static LIST_HEAD(ib_nl_request_list);
152 static DEFINE_SPINLOCK(ib_nl_request_lock);
153 static atomic_t ib_nl_sa_request_seq;
154 static struct workqueue_struct *ib_nl_wq;
155 static struct delayed_work ib_nl_timed_work;
156 static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = {
157 [LS_NLA_TYPE_PATH_RECORD] = {.type = NLA_BINARY,
158 .len = sizeof(struct ib_path_rec_data)},
159 [LS_NLA_TYPE_TIMEOUT] = {.type = NLA_U32},
160 [LS_NLA_TYPE_SERVICE_ID] = {.type = NLA_U64},
161 [LS_NLA_TYPE_DGID] = {.type = NLA_BINARY,
162 .len = sizeof(struct rdma_nla_ls_gid)},
163 [LS_NLA_TYPE_SGID] = {.type = NLA_BINARY,
164 .len = sizeof(struct rdma_nla_ls_gid)},
165 [LS_NLA_TYPE_TCLASS] = {.type = NLA_U8},
166 [LS_NLA_TYPE_PKEY] = {.type = NLA_U16},
167 [LS_NLA_TYPE_QOS_CLASS] = {.type = NLA_U16},
168 };
169
170
171 static int ib_sa_add_one(struct ib_device *device);
172 static void ib_sa_remove_one(struct ib_device *device, void *client_data);
173
174 static struct ib_client sa_client = {
175 .name = "sa",
176 .add = ib_sa_add_one,
177 .remove = ib_sa_remove_one
178 };
179
180 static DEFINE_XARRAY_FLAGS(queries, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
181
182 static DEFINE_SPINLOCK(tid_lock);
183 static u32 tid;
184
185 #define PATH_REC_FIELD(field) \
186 .struct_offset_bytes = offsetof(struct sa_path_rec, field), \
187 .struct_size_bytes = sizeof_field(struct sa_path_rec, field), \
188 .field_name = "sa_path_rec:" #field
189
190 static const struct ib_field path_rec_table[] = {
191 { PATH_REC_FIELD(service_id),
192 .offset_words = 0,
193 .offset_bits = 0,
194 .size_bits = 64 },
195 { PATH_REC_FIELD(dgid),
196 .offset_words = 2,
197 .offset_bits = 0,
198 .size_bits = 128 },
199 { PATH_REC_FIELD(sgid),
200 .offset_words = 6,
201 .offset_bits = 0,
202 .size_bits = 128 },
203 { PATH_REC_FIELD(ib.dlid),
204 .offset_words = 10,
205 .offset_bits = 0,
206 .size_bits = 16 },
207 { PATH_REC_FIELD(ib.slid),
208 .offset_words = 10,
209 .offset_bits = 16,
210 .size_bits = 16 },
211 { PATH_REC_FIELD(ib.raw_traffic),
212 .offset_words = 11,
213 .offset_bits = 0,
214 .size_bits = 1 },
215 { RESERVED,
216 .offset_words = 11,
217 .offset_bits = 1,
218 .size_bits = 3 },
219 { PATH_REC_FIELD(flow_label),
220 .offset_words = 11,
221 .offset_bits = 4,
222 .size_bits = 20 },
223 { PATH_REC_FIELD(hop_limit),
224 .offset_words = 11,
225 .offset_bits = 24,
226 .size_bits = 8 },
227 { PATH_REC_FIELD(traffic_class),
228 .offset_words = 12,
229 .offset_bits = 0,
230 .size_bits = 8 },
231 { PATH_REC_FIELD(reversible),
232 .offset_words = 12,
233 .offset_bits = 8,
234 .size_bits = 1 },
235 { PATH_REC_FIELD(numb_path),
236 .offset_words = 12,
237 .offset_bits = 9,
238 .size_bits = 7 },
239 { PATH_REC_FIELD(pkey),
240 .offset_words = 12,
241 .offset_bits = 16,
242 .size_bits = 16 },
243 { PATH_REC_FIELD(qos_class),
244 .offset_words = 13,
245 .offset_bits = 0,
246 .size_bits = 12 },
247 { PATH_REC_FIELD(sl),
248 .offset_words = 13,
249 .offset_bits = 12,
250 .size_bits = 4 },
251 { PATH_REC_FIELD(mtu_selector),
252 .offset_words = 13,
253 .offset_bits = 16,
254 .size_bits = 2 },
255 { PATH_REC_FIELD(mtu),
256 .offset_words = 13,
257 .offset_bits = 18,
258 .size_bits = 6 },
259 { PATH_REC_FIELD(rate_selector),
260 .offset_words = 13,
261 .offset_bits = 24,
262 .size_bits = 2 },
263 { PATH_REC_FIELD(rate),
264 .offset_words = 13,
265 .offset_bits = 26,
266 .size_bits = 6 },
267 { PATH_REC_FIELD(packet_life_time_selector),
268 .offset_words = 14,
269 .offset_bits = 0,
270 .size_bits = 2 },
271 { PATH_REC_FIELD(packet_life_time),
272 .offset_words = 14,
273 .offset_bits = 2,
274 .size_bits = 6 },
275 { PATH_REC_FIELD(preference),
276 .offset_words = 14,
277 .offset_bits = 8,
278 .size_bits = 8 },
279 { RESERVED,
280 .offset_words = 14,
281 .offset_bits = 16,
282 .size_bits = 48 },
283 };
284
285 #define OPA_PATH_REC_FIELD(field) \
286 .struct_offset_bytes = \
287 offsetof(struct sa_path_rec, field), \
288 .struct_size_bytes = \
289 sizeof_field(struct sa_path_rec, field), \
290 .field_name = "sa_path_rec:" #field
291
292 static const struct ib_field opa_path_rec_table[] = {
293 { OPA_PATH_REC_FIELD(service_id),
294 .offset_words = 0,
295 .offset_bits = 0,
296 .size_bits = 64 },
297 { OPA_PATH_REC_FIELD(dgid),
298 .offset_words = 2,
299 .offset_bits = 0,
300 .size_bits = 128 },
301 { OPA_PATH_REC_FIELD(sgid),
302 .offset_words = 6,
303 .offset_bits = 0,
304 .size_bits = 128 },
305 { OPA_PATH_REC_FIELD(opa.dlid),
306 .offset_words = 10,
307 .offset_bits = 0,
308 .size_bits = 32 },
309 { OPA_PATH_REC_FIELD(opa.slid),
310 .offset_words = 11,
311 .offset_bits = 0,
312 .size_bits = 32 },
313 { OPA_PATH_REC_FIELD(opa.raw_traffic),
314 .offset_words = 12,
315 .offset_bits = 0,
316 .size_bits = 1 },
317 { RESERVED,
318 .offset_words = 12,
319 .offset_bits = 1,
320 .size_bits = 3 },
321 { OPA_PATH_REC_FIELD(flow_label),
322 .offset_words = 12,
323 .offset_bits = 4,
324 .size_bits = 20 },
325 { OPA_PATH_REC_FIELD(hop_limit),
326 .offset_words = 12,
327 .offset_bits = 24,
328 .size_bits = 8 },
329 { OPA_PATH_REC_FIELD(traffic_class),
330 .offset_words = 13,
331 .offset_bits = 0,
332 .size_bits = 8 },
333 { OPA_PATH_REC_FIELD(reversible),
334 .offset_words = 13,
335 .offset_bits = 8,
336 .size_bits = 1 },
337 { OPA_PATH_REC_FIELD(numb_path),
338 .offset_words = 13,
339 .offset_bits = 9,
340 .size_bits = 7 },
341 { OPA_PATH_REC_FIELD(pkey),
342 .offset_words = 13,
343 .offset_bits = 16,
344 .size_bits = 16 },
345 { OPA_PATH_REC_FIELD(opa.l2_8B),
346 .offset_words = 14,
347 .offset_bits = 0,
348 .size_bits = 1 },
349 { OPA_PATH_REC_FIELD(opa.l2_10B),
350 .offset_words = 14,
351 .offset_bits = 1,
352 .size_bits = 1 },
353 { OPA_PATH_REC_FIELD(opa.l2_9B),
354 .offset_words = 14,
355 .offset_bits = 2,
356 .size_bits = 1 },
357 { OPA_PATH_REC_FIELD(opa.l2_16B),
358 .offset_words = 14,
359 .offset_bits = 3,
360 .size_bits = 1 },
361 { RESERVED,
362 .offset_words = 14,
363 .offset_bits = 4,
364 .size_bits = 2 },
365 { OPA_PATH_REC_FIELD(opa.qos_type),
366 .offset_words = 14,
367 .offset_bits = 6,
368 .size_bits = 2 },
369 { OPA_PATH_REC_FIELD(opa.qos_priority),
370 .offset_words = 14,
371 .offset_bits = 8,
372 .size_bits = 8 },
373 { RESERVED,
374 .offset_words = 14,
375 .offset_bits = 16,
376 .size_bits = 3 },
377 { OPA_PATH_REC_FIELD(sl),
378 .offset_words = 14,
379 .offset_bits = 19,
380 .size_bits = 5 },
381 { RESERVED,
382 .offset_words = 14,
383 .offset_bits = 24,
384 .size_bits = 8 },
385 { OPA_PATH_REC_FIELD(mtu_selector),
386 .offset_words = 15,
387 .offset_bits = 0,
388 .size_bits = 2 },
389 { OPA_PATH_REC_FIELD(mtu),
390 .offset_words = 15,
391 .offset_bits = 2,
392 .size_bits = 6 },
393 { OPA_PATH_REC_FIELD(rate_selector),
394 .offset_words = 15,
395 .offset_bits = 8,
396 .size_bits = 2 },
397 { OPA_PATH_REC_FIELD(rate),
398 .offset_words = 15,
399 .offset_bits = 10,
400 .size_bits = 6 },
401 { OPA_PATH_REC_FIELD(packet_life_time_selector),
402 .offset_words = 15,
403 .offset_bits = 16,
404 .size_bits = 2 },
405 { OPA_PATH_REC_FIELD(packet_life_time),
406 .offset_words = 15,
407 .offset_bits = 18,
408 .size_bits = 6 },
409 { OPA_PATH_REC_FIELD(preference),
410 .offset_words = 15,
411 .offset_bits = 24,
412 .size_bits = 8 },
413 };
414
415 #define MCMEMBER_REC_FIELD(field) \
416 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
417 .struct_size_bytes = sizeof_field(struct ib_sa_mcmember_rec, field), \
418 .field_name = "sa_mcmember_rec:" #field
419
420 static const struct ib_field mcmember_rec_table[] = {
421 { MCMEMBER_REC_FIELD(mgid),
422 .offset_words = 0,
423 .offset_bits = 0,
424 .size_bits = 128 },
425 { MCMEMBER_REC_FIELD(port_gid),
426 .offset_words = 4,
427 .offset_bits = 0,
428 .size_bits = 128 },
429 { MCMEMBER_REC_FIELD(qkey),
430 .offset_words = 8,
431 .offset_bits = 0,
432 .size_bits = 32 },
433 { MCMEMBER_REC_FIELD(mlid),
434 .offset_words = 9,
435 .offset_bits = 0,
436 .size_bits = 16 },
437 { MCMEMBER_REC_FIELD(mtu_selector),
438 .offset_words = 9,
439 .offset_bits = 16,
440 .size_bits = 2 },
441 { MCMEMBER_REC_FIELD(mtu),
442 .offset_words = 9,
443 .offset_bits = 18,
444 .size_bits = 6 },
445 { MCMEMBER_REC_FIELD(traffic_class),
446 .offset_words = 9,
447 .offset_bits = 24,
448 .size_bits = 8 },
449 { MCMEMBER_REC_FIELD(pkey),
450 .offset_words = 10,
451 .offset_bits = 0,
452 .size_bits = 16 },
453 { MCMEMBER_REC_FIELD(rate_selector),
454 .offset_words = 10,
455 .offset_bits = 16,
456 .size_bits = 2 },
457 { MCMEMBER_REC_FIELD(rate),
458 .offset_words = 10,
459 .offset_bits = 18,
460 .size_bits = 6 },
461 { MCMEMBER_REC_FIELD(packet_life_time_selector),
462 .offset_words = 10,
463 .offset_bits = 24,
464 .size_bits = 2 },
465 { MCMEMBER_REC_FIELD(packet_life_time),
466 .offset_words = 10,
467 .offset_bits = 26,
468 .size_bits = 6 },
469 { MCMEMBER_REC_FIELD(sl),
470 .offset_words = 11,
471 .offset_bits = 0,
472 .size_bits = 4 },
473 { MCMEMBER_REC_FIELD(flow_label),
474 .offset_words = 11,
475 .offset_bits = 4,
476 .size_bits = 20 },
477 { MCMEMBER_REC_FIELD(hop_limit),
478 .offset_words = 11,
479 .offset_bits = 24,
480 .size_bits = 8 },
481 { MCMEMBER_REC_FIELD(scope),
482 .offset_words = 12,
483 .offset_bits = 0,
484 .size_bits = 4 },
485 { MCMEMBER_REC_FIELD(join_state),
486 .offset_words = 12,
487 .offset_bits = 4,
488 .size_bits = 4 },
489 { MCMEMBER_REC_FIELD(proxy_join),
490 .offset_words = 12,
491 .offset_bits = 8,
492 .size_bits = 1 },
493 { RESERVED,
494 .offset_words = 12,
495 .offset_bits = 9,
496 .size_bits = 23 },
497 };
498
499 #define CLASSPORTINFO_REC_FIELD(field) \
500 .struct_offset_bytes = offsetof(struct ib_class_port_info, field), \
501 .struct_size_bytes = sizeof_field(struct ib_class_port_info, field), \
502 .field_name = "ib_class_port_info:" #field
503
504 static const struct ib_field ib_classport_info_rec_table[] = {
505 { CLASSPORTINFO_REC_FIELD(base_version),
506 .offset_words = 0,
507 .offset_bits = 0,
508 .size_bits = 8 },
509 { CLASSPORTINFO_REC_FIELD(class_version),
510 .offset_words = 0,
511 .offset_bits = 8,
512 .size_bits = 8 },
513 { CLASSPORTINFO_REC_FIELD(capability_mask),
514 .offset_words = 0,
515 .offset_bits = 16,
516 .size_bits = 16 },
517 { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
518 .offset_words = 1,
519 .offset_bits = 0,
520 .size_bits = 32 },
521 { CLASSPORTINFO_REC_FIELD(redirect_gid),
522 .offset_words = 2,
523 .offset_bits = 0,
524 .size_bits = 128 },
525 { CLASSPORTINFO_REC_FIELD(redirect_tcslfl),
526 .offset_words = 6,
527 .offset_bits = 0,
528 .size_bits = 32 },
529 { CLASSPORTINFO_REC_FIELD(redirect_lid),
530 .offset_words = 7,
531 .offset_bits = 0,
532 .size_bits = 16 },
533 { CLASSPORTINFO_REC_FIELD(redirect_pkey),
534 .offset_words = 7,
535 .offset_bits = 16,
536 .size_bits = 16 },
537
538 { CLASSPORTINFO_REC_FIELD(redirect_qp),
539 .offset_words = 8,
540 .offset_bits = 0,
541 .size_bits = 32 },
542 { CLASSPORTINFO_REC_FIELD(redirect_qkey),
543 .offset_words = 9,
544 .offset_bits = 0,
545 .size_bits = 32 },
546
547 { CLASSPORTINFO_REC_FIELD(trap_gid),
548 .offset_words = 10,
549 .offset_bits = 0,
550 .size_bits = 128 },
551 { CLASSPORTINFO_REC_FIELD(trap_tcslfl),
552 .offset_words = 14,
553 .offset_bits = 0,
554 .size_bits = 32 },
555
556 { CLASSPORTINFO_REC_FIELD(trap_lid),
557 .offset_words = 15,
558 .offset_bits = 0,
559 .size_bits = 16 },
560 { CLASSPORTINFO_REC_FIELD(trap_pkey),
561 .offset_words = 15,
562 .offset_bits = 16,
563 .size_bits = 16 },
564
565 { CLASSPORTINFO_REC_FIELD(trap_hlqp),
566 .offset_words = 16,
567 .offset_bits = 0,
568 .size_bits = 32 },
569 { CLASSPORTINFO_REC_FIELD(trap_qkey),
570 .offset_words = 17,
571 .offset_bits = 0,
572 .size_bits = 32 },
573 };
574
575 #define OPA_CLASSPORTINFO_REC_FIELD(field) \
576 .struct_offset_bytes =\
577 offsetof(struct opa_class_port_info, field), \
578 .struct_size_bytes = \
579 sizeof_field(struct opa_class_port_info, field), \
580 .field_name = "opa_class_port_info:" #field
581
582 static const struct ib_field opa_classport_info_rec_table[] = {
583 { OPA_CLASSPORTINFO_REC_FIELD(base_version),
584 .offset_words = 0,
585 .offset_bits = 0,
586 .size_bits = 8 },
587 { OPA_CLASSPORTINFO_REC_FIELD(class_version),
588 .offset_words = 0,
589 .offset_bits = 8,
590 .size_bits = 8 },
591 { OPA_CLASSPORTINFO_REC_FIELD(cap_mask),
592 .offset_words = 0,
593 .offset_bits = 16,
594 .size_bits = 16 },
595 { OPA_CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
596 .offset_words = 1,
597 .offset_bits = 0,
598 .size_bits = 32 },
599 { OPA_CLASSPORTINFO_REC_FIELD(redirect_gid),
600 .offset_words = 2,
601 .offset_bits = 0,
602 .size_bits = 128 },
603 { OPA_CLASSPORTINFO_REC_FIELD(redirect_tc_fl),
604 .offset_words = 6,
605 .offset_bits = 0,
606 .size_bits = 32 },
607 { OPA_CLASSPORTINFO_REC_FIELD(redirect_lid),
608 .offset_words = 7,
609 .offset_bits = 0,
610 .size_bits = 32 },
611 { OPA_CLASSPORTINFO_REC_FIELD(redirect_sl_qp),
612 .offset_words = 8,
613 .offset_bits = 0,
614 .size_bits = 32 },
615 { OPA_CLASSPORTINFO_REC_FIELD(redirect_qkey),
616 .offset_words = 9,
617 .offset_bits = 0,
618 .size_bits = 32 },
619 { OPA_CLASSPORTINFO_REC_FIELD(trap_gid),
620 .offset_words = 10,
621 .offset_bits = 0,
622 .size_bits = 128 },
623 { OPA_CLASSPORTINFO_REC_FIELD(trap_tc_fl),
624 .offset_words = 14,
625 .offset_bits = 0,
626 .size_bits = 32 },
627 { OPA_CLASSPORTINFO_REC_FIELD(trap_lid),
628 .offset_words = 15,
629 .offset_bits = 0,
630 .size_bits = 32 },
631 { OPA_CLASSPORTINFO_REC_FIELD(trap_hl_qp),
632 .offset_words = 16,
633 .offset_bits = 0,
634 .size_bits = 32 },
635 { OPA_CLASSPORTINFO_REC_FIELD(trap_qkey),
636 .offset_words = 17,
637 .offset_bits = 0,
638 .size_bits = 32 },
639 { OPA_CLASSPORTINFO_REC_FIELD(trap_pkey),
640 .offset_words = 18,
641 .offset_bits = 0,
642 .size_bits = 16 },
643 { OPA_CLASSPORTINFO_REC_FIELD(redirect_pkey),
644 .offset_words = 18,
645 .offset_bits = 16,
646 .size_bits = 16 },
647 { OPA_CLASSPORTINFO_REC_FIELD(trap_sl_rsvd),
648 .offset_words = 19,
649 .offset_bits = 0,
650 .size_bits = 8 },
651 { RESERVED,
652 .offset_words = 19,
653 .offset_bits = 8,
654 .size_bits = 24 },
655 };
656
657 #define GUIDINFO_REC_FIELD(field) \
658 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \
659 .struct_size_bytes = sizeof_field(struct ib_sa_guidinfo_rec, field), \
660 .field_name = "sa_guidinfo_rec:" #field
661
662 static const struct ib_field guidinfo_rec_table[] = {
663 { GUIDINFO_REC_FIELD(lid),
664 .offset_words = 0,
665 .offset_bits = 0,
666 .size_bits = 16 },
667 { GUIDINFO_REC_FIELD(block_num),
668 .offset_words = 0,
669 .offset_bits = 16,
670 .size_bits = 8 },
671 { GUIDINFO_REC_FIELD(res1),
672 .offset_words = 0,
673 .offset_bits = 24,
674 .size_bits = 8 },
675 { GUIDINFO_REC_FIELD(res2),
676 .offset_words = 1,
677 .offset_bits = 0,
678 .size_bits = 32 },
679 { GUIDINFO_REC_FIELD(guid_info_list),
680 .offset_words = 2,
681 .offset_bits = 0,
682 .size_bits = 512 },
683 };
684
ib_sa_disable_local_svc(struct ib_sa_query * query)685 static inline void ib_sa_disable_local_svc(struct ib_sa_query *query)
686 {
687 query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE;
688 }
689
ib_sa_query_cancelled(struct ib_sa_query * query)690 static inline int ib_sa_query_cancelled(struct ib_sa_query *query)
691 {
692 return (query->flags & IB_SA_CANCEL);
693 }
694
ib_nl_set_path_rec_attrs(struct sk_buff * skb,struct ib_sa_query * query)695 static void ib_nl_set_path_rec_attrs(struct sk_buff *skb,
696 struct ib_sa_query *query)
697 {
698 struct sa_path_rec *sa_rec = query->mad_buf->context[1];
699 struct ib_sa_mad *mad = query->mad_buf->mad;
700 ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask;
701 u16 val16;
702 u64 val64;
703 struct rdma_ls_resolve_header *header;
704
705 query->mad_buf->context[1] = NULL;
706
707 /* Construct the family header first */
708 header = skb_put(skb, NLMSG_ALIGN(sizeof(*header)));
709 strscpy_pad(header->device_name,
710 dev_name(&query->port->agent->device->dev),
711 LS_DEVICE_NAME_MAX);
712 header->port_num = query->port->port_num;
713
714 if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) &&
715 sa_rec->reversible != 0)
716 query->path_use = LS_RESOLVE_PATH_USE_GMP;
717 else
718 query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL;
719 header->path_use = query->path_use;
720
721 /* Now build the attributes */
722 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) {
723 val64 = be64_to_cpu(sa_rec->service_id);
724 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID,
725 sizeof(val64), &val64);
726 }
727 if (comp_mask & IB_SA_PATH_REC_DGID)
728 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID,
729 sizeof(sa_rec->dgid), &sa_rec->dgid);
730 if (comp_mask & IB_SA_PATH_REC_SGID)
731 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID,
732 sizeof(sa_rec->sgid), &sa_rec->sgid);
733 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
734 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS,
735 sizeof(sa_rec->traffic_class), &sa_rec->traffic_class);
736
737 if (comp_mask & IB_SA_PATH_REC_PKEY) {
738 val16 = be16_to_cpu(sa_rec->pkey);
739 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY,
740 sizeof(val16), &val16);
741 }
742 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) {
743 val16 = be16_to_cpu(sa_rec->qos_class);
744 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS,
745 sizeof(val16), &val16);
746 }
747 }
748
ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask)749 static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask)
750 {
751 int len = 0;
752
753 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID)
754 len += nla_total_size(sizeof(u64));
755 if (comp_mask & IB_SA_PATH_REC_DGID)
756 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
757 if (comp_mask & IB_SA_PATH_REC_SGID)
758 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
759 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
760 len += nla_total_size(sizeof(u8));
761 if (comp_mask & IB_SA_PATH_REC_PKEY)
762 len += nla_total_size(sizeof(u16));
763 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS)
764 len += nla_total_size(sizeof(u16));
765
766 /*
767 * Make sure that at least some of the required comp_mask bits are
768 * set.
769 */
770 if (WARN_ON(len == 0))
771 return len;
772
773 /* Add the family header */
774 len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header));
775
776 return len;
777 }
778
ib_nl_make_request(struct ib_sa_query * query,gfp_t gfp_mask)779 static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
780 {
781 struct sk_buff *skb = NULL;
782 struct nlmsghdr *nlh;
783 void *data;
784 struct ib_sa_mad *mad;
785 int len;
786 unsigned long flags;
787 unsigned long delay;
788 gfp_t gfp_flag;
789 int ret;
790
791 INIT_LIST_HEAD(&query->list);
792 query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq);
793
794 mad = query->mad_buf->mad;
795 len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask);
796 if (len <= 0)
797 return -EMSGSIZE;
798
799 skb = nlmsg_new(len, gfp_mask);
800 if (!skb)
801 return -ENOMEM;
802
803 /* Put nlmsg header only for now */
804 data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS,
805 RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST);
806 if (!data) {
807 nlmsg_free(skb);
808 return -EMSGSIZE;
809 }
810
811 /* Add attributes */
812 ib_nl_set_path_rec_attrs(skb, query);
813
814 /* Repair the nlmsg header length */
815 nlmsg_end(skb, nlh);
816
817 gfp_flag = ((gfp_mask & GFP_ATOMIC) == GFP_ATOMIC) ? GFP_ATOMIC :
818 GFP_NOWAIT;
819
820 spin_lock_irqsave(&ib_nl_request_lock, flags);
821 ret = rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_LS, gfp_flag);
822
823 if (ret)
824 goto out;
825
826 /* Put the request on the list.*/
827 delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
828 query->timeout = delay + jiffies;
829 list_add_tail(&query->list, &ib_nl_request_list);
830 /* Start the timeout if this is the only request */
831 if (ib_nl_request_list.next == &query->list)
832 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
833
834 out:
835 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
836
837 return ret;
838 }
839
ib_nl_cancel_request(struct ib_sa_query * query)840 static int ib_nl_cancel_request(struct ib_sa_query *query)
841 {
842 unsigned long flags;
843 struct ib_sa_query *wait_query;
844 int found = 0;
845
846 spin_lock_irqsave(&ib_nl_request_lock, flags);
847 list_for_each_entry(wait_query, &ib_nl_request_list, list) {
848 /* Let the timeout to take care of the callback */
849 if (query == wait_query) {
850 query->flags |= IB_SA_CANCEL;
851 query->timeout = jiffies;
852 list_move(&query->list, &ib_nl_request_list);
853 found = 1;
854 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1);
855 break;
856 }
857 }
858 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
859
860 return found;
861 }
862
863 static void send_handler(struct ib_mad_agent *agent,
864 struct ib_mad_send_wc *mad_send_wc);
865
ib_nl_process_good_resolve_rsp(struct ib_sa_query * query,const struct nlmsghdr * nlh)866 static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
867 const struct nlmsghdr *nlh)
868 {
869 struct ib_mad_send_wc mad_send_wc;
870 struct ib_sa_mad *mad = NULL;
871 const struct nlattr *head, *curr;
872 struct ib_path_rec_data *rec;
873 int len, rem;
874 u32 mask = 0;
875 int status = -EIO;
876
877 if (query->callback) {
878 head = (const struct nlattr *) nlmsg_data(nlh);
879 len = nlmsg_len(nlh);
880 switch (query->path_use) {
881 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL:
882 mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND;
883 break;
884
885 case LS_RESOLVE_PATH_USE_ALL:
886 case LS_RESOLVE_PATH_USE_GMP:
887 default:
888 mask = IB_PATH_PRIMARY | IB_PATH_GMP |
889 IB_PATH_BIDIRECTIONAL;
890 break;
891 }
892 nla_for_each_attr(curr, head, len, rem) {
893 if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
894 rec = nla_data(curr);
895 /*
896 * Get the first one. In the future, we may
897 * need to get up to 6 pathrecords.
898 */
899 if ((rec->flags & mask) == mask) {
900 mad = query->mad_buf->mad;
901 mad->mad_hdr.method |=
902 IB_MGMT_METHOD_RESP;
903 memcpy(mad->data, rec->path_rec,
904 sizeof(rec->path_rec));
905 status = 0;
906 break;
907 }
908 }
909 }
910 query->callback(query, status, mad);
911 }
912
913 mad_send_wc.send_buf = query->mad_buf;
914 mad_send_wc.status = IB_WC_SUCCESS;
915 send_handler(query->mad_buf->mad_agent, &mad_send_wc);
916 }
917
ib_nl_request_timeout(struct work_struct * work)918 static void ib_nl_request_timeout(struct work_struct *work)
919 {
920 unsigned long flags;
921 struct ib_sa_query *query;
922 unsigned long delay;
923 struct ib_mad_send_wc mad_send_wc;
924 int ret;
925
926 spin_lock_irqsave(&ib_nl_request_lock, flags);
927 while (!list_empty(&ib_nl_request_list)) {
928 query = list_entry(ib_nl_request_list.next,
929 struct ib_sa_query, list);
930
931 if (time_after(query->timeout, jiffies)) {
932 delay = query->timeout - jiffies;
933 if ((long)delay <= 0)
934 delay = 1;
935 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
936 break;
937 }
938
939 list_del(&query->list);
940 ib_sa_disable_local_svc(query);
941 /* Hold the lock to protect against query cancellation */
942 if (ib_sa_query_cancelled(query))
943 ret = -1;
944 else
945 ret = ib_post_send_mad(query->mad_buf, NULL);
946 if (ret) {
947 mad_send_wc.send_buf = query->mad_buf;
948 mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
949 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
950 send_handler(query->port->agent, &mad_send_wc);
951 spin_lock_irqsave(&ib_nl_request_lock, flags);
952 }
953 }
954 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
955 }
956
ib_nl_handle_set_timeout(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack)957 int ib_nl_handle_set_timeout(struct sk_buff *skb,
958 struct nlmsghdr *nlh,
959 struct netlink_ext_ack *extack)
960 {
961 int timeout, delta, abs_delta;
962 const struct nlattr *attr;
963 unsigned long flags;
964 struct ib_sa_query *query;
965 long delay = 0;
966 struct nlattr *tb[LS_NLA_TYPE_MAX];
967 int ret;
968
969 if (!(nlh->nlmsg_flags & NLM_F_REQUEST) ||
970 !(NETLINK_CB(skb).sk))
971 return -EPERM;
972
973 ret = nla_parse_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
974 nlmsg_len(nlh), ib_nl_policy, NULL);
975 attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT];
976 if (ret || !attr)
977 goto settimeout_out;
978
979 timeout = *(int *) nla_data(attr);
980 if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN)
981 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN;
982 if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX)
983 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX;
984
985 delta = timeout - sa_local_svc_timeout_ms;
986 if (delta < 0)
987 abs_delta = -delta;
988 else
989 abs_delta = delta;
990
991 if (delta != 0) {
992 spin_lock_irqsave(&ib_nl_request_lock, flags);
993 sa_local_svc_timeout_ms = timeout;
994 list_for_each_entry(query, &ib_nl_request_list, list) {
995 if (delta < 0 && abs_delta > query->timeout)
996 query->timeout = 0;
997 else
998 query->timeout += delta;
999
1000 /* Get the new delay from the first entry */
1001 if (!delay) {
1002 delay = query->timeout - jiffies;
1003 if (delay <= 0)
1004 delay = 1;
1005 }
1006 }
1007 if (delay)
1008 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work,
1009 (unsigned long)delay);
1010 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1011 }
1012
1013 settimeout_out:
1014 return 0;
1015 }
1016
ib_nl_is_good_resolve_resp(const struct nlmsghdr * nlh)1017 static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh)
1018 {
1019 struct nlattr *tb[LS_NLA_TYPE_MAX];
1020 int ret;
1021
1022 if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR)
1023 return 0;
1024
1025 ret = nla_parse_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1026 nlmsg_len(nlh), ib_nl_policy, NULL);
1027 if (ret)
1028 return 0;
1029
1030 return 1;
1031 }
1032
ib_nl_handle_resolve_resp(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack)1033 int ib_nl_handle_resolve_resp(struct sk_buff *skb,
1034 struct nlmsghdr *nlh,
1035 struct netlink_ext_ack *extack)
1036 {
1037 unsigned long flags;
1038 struct ib_sa_query *query;
1039 struct ib_mad_send_buf *send_buf;
1040 struct ib_mad_send_wc mad_send_wc;
1041 int found = 0;
1042 int ret;
1043
1044 if ((nlh->nlmsg_flags & NLM_F_REQUEST) ||
1045 !(NETLINK_CB(skb).sk))
1046 return -EPERM;
1047
1048 spin_lock_irqsave(&ib_nl_request_lock, flags);
1049 list_for_each_entry(query, &ib_nl_request_list, list) {
1050 /*
1051 * If the query is cancelled, let the timeout routine
1052 * take care of it.
1053 */
1054 if (nlh->nlmsg_seq == query->seq) {
1055 found = !ib_sa_query_cancelled(query);
1056 if (found)
1057 list_del(&query->list);
1058 break;
1059 }
1060 }
1061
1062 if (!found) {
1063 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1064 goto resp_out;
1065 }
1066
1067 send_buf = query->mad_buf;
1068
1069 if (!ib_nl_is_good_resolve_resp(nlh)) {
1070 /* if the result is a failure, send out the packet via IB */
1071 ib_sa_disable_local_svc(query);
1072 ret = ib_post_send_mad(query->mad_buf, NULL);
1073 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1074 if (ret) {
1075 mad_send_wc.send_buf = send_buf;
1076 mad_send_wc.status = IB_WC_GENERAL_ERR;
1077 send_handler(query->port->agent, &mad_send_wc);
1078 }
1079 } else {
1080 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1081 ib_nl_process_good_resolve_rsp(query, nlh);
1082 }
1083
1084 resp_out:
1085 return 0;
1086 }
1087
free_sm_ah(struct kref * kref)1088 static void free_sm_ah(struct kref *kref)
1089 {
1090 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
1091
1092 rdma_destroy_ah(sm_ah->ah, 0);
1093 kfree(sm_ah);
1094 }
1095
ib_sa_register_client(struct ib_sa_client * client)1096 void ib_sa_register_client(struct ib_sa_client *client)
1097 {
1098 atomic_set(&client->users, 1);
1099 init_completion(&client->comp);
1100 }
1101 EXPORT_SYMBOL(ib_sa_register_client);
1102
ib_sa_unregister_client(struct ib_sa_client * client)1103 void ib_sa_unregister_client(struct ib_sa_client *client)
1104 {
1105 ib_sa_client_put(client);
1106 wait_for_completion(&client->comp);
1107 }
1108 EXPORT_SYMBOL(ib_sa_unregister_client);
1109
1110 /**
1111 * ib_sa_cancel_query - try to cancel an SA query
1112 * @id:ID of query to cancel
1113 * @query:query pointer to cancel
1114 *
1115 * Try to cancel an SA query. If the id and query don't match up or
1116 * the query has already completed, nothing is done. Otherwise the
1117 * query is canceled and will complete with a status of -EINTR.
1118 */
ib_sa_cancel_query(int id,struct ib_sa_query * query)1119 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
1120 {
1121 unsigned long flags;
1122 struct ib_mad_send_buf *mad_buf;
1123
1124 xa_lock_irqsave(&queries, flags);
1125 if (xa_load(&queries, id) != query) {
1126 xa_unlock_irqrestore(&queries, flags);
1127 return;
1128 }
1129 mad_buf = query->mad_buf;
1130 xa_unlock_irqrestore(&queries, flags);
1131
1132 /*
1133 * If the query is still on the netlink request list, schedule
1134 * it to be cancelled by the timeout routine. Otherwise, it has been
1135 * sent to the MAD layer and has to be cancelled from there.
1136 */
1137 if (!ib_nl_cancel_request(query))
1138 ib_cancel_mad(mad_buf);
1139 }
1140 EXPORT_SYMBOL(ib_sa_cancel_query);
1141
get_src_path_mask(struct ib_device * device,u32 port_num)1142 static u8 get_src_path_mask(struct ib_device *device, u32 port_num)
1143 {
1144 struct ib_sa_device *sa_dev;
1145 struct ib_sa_port *port;
1146 unsigned long flags;
1147 u8 src_path_mask;
1148
1149 sa_dev = ib_get_client_data(device, &sa_client);
1150 if (!sa_dev)
1151 return 0x7f;
1152
1153 port = &sa_dev->port[port_num - sa_dev->start_port];
1154 spin_lock_irqsave(&port->ah_lock, flags);
1155 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
1156 spin_unlock_irqrestore(&port->ah_lock, flags);
1157
1158 return src_path_mask;
1159 }
1160
init_ah_attr_grh_fields(struct ib_device * device,u32 port_num,struct sa_path_rec * rec,struct rdma_ah_attr * ah_attr,const struct ib_gid_attr * gid_attr)1161 static int init_ah_attr_grh_fields(struct ib_device *device, u32 port_num,
1162 struct sa_path_rec *rec,
1163 struct rdma_ah_attr *ah_attr,
1164 const struct ib_gid_attr *gid_attr)
1165 {
1166 enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec);
1167
1168 if (!gid_attr) {
1169 gid_attr = rdma_find_gid_by_port(device, &rec->sgid, type,
1170 port_num, NULL);
1171 if (IS_ERR(gid_attr))
1172 return PTR_ERR(gid_attr);
1173 } else
1174 rdma_hold_gid_attr(gid_attr);
1175
1176 rdma_move_grh_sgid_attr(ah_attr, &rec->dgid,
1177 be32_to_cpu(rec->flow_label),
1178 rec->hop_limit, rec->traffic_class,
1179 gid_attr);
1180 return 0;
1181 }
1182
1183 /**
1184 * ib_init_ah_attr_from_path - Initialize address handle attributes based on
1185 * an SA path record.
1186 * @device: Device associated ah attributes initialization.
1187 * @port_num: Port on the specified device.
1188 * @rec: path record entry to use for ah attributes initialization.
1189 * @ah_attr: address handle attributes to initialization from path record.
1190 * @gid_attr: SGID attribute to consider during initialization.
1191 *
1192 * When ib_init_ah_attr_from_path() returns success,
1193 * (a) for IB link layer it optionally contains a reference to SGID attribute
1194 * when GRH is present for IB link layer.
1195 * (b) for RoCE link layer it contains a reference to SGID attribute.
1196 * User must invoke rdma_destroy_ah_attr() to release reference to SGID
1197 * attributes which are initialized using ib_init_ah_attr_from_path().
1198 */
ib_init_ah_attr_from_path(struct ib_device * device,u32 port_num,struct sa_path_rec * rec,struct rdma_ah_attr * ah_attr,const struct ib_gid_attr * gid_attr)1199 int ib_init_ah_attr_from_path(struct ib_device *device, u32 port_num,
1200 struct sa_path_rec *rec,
1201 struct rdma_ah_attr *ah_attr,
1202 const struct ib_gid_attr *gid_attr)
1203 {
1204 int ret = 0;
1205
1206 memset(ah_attr, 0, sizeof(*ah_attr));
1207 ah_attr->type = rdma_ah_find_type(device, port_num);
1208 rdma_ah_set_sl(ah_attr, rec->sl);
1209 rdma_ah_set_port_num(ah_attr, port_num);
1210 rdma_ah_set_static_rate(ah_attr, rec->rate);
1211
1212 if (sa_path_is_roce(rec)) {
1213 ret = roce_resolve_route_from_path(rec, gid_attr);
1214 if (ret)
1215 return ret;
1216
1217 memcpy(ah_attr->roce.dmac, sa_path_get_dmac(rec), ETH_ALEN);
1218 } else {
1219 rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec)));
1220 if (sa_path_is_opa(rec) &&
1221 rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE))
1222 rdma_ah_set_make_grd(ah_attr, true);
1223
1224 rdma_ah_set_path_bits(ah_attr,
1225 be32_to_cpu(sa_path_get_slid(rec)) &
1226 get_src_path_mask(device, port_num));
1227 }
1228
1229 if (rec->hop_limit > 0 || sa_path_is_roce(rec))
1230 ret = init_ah_attr_grh_fields(device, port_num,
1231 rec, ah_attr, gid_attr);
1232 return ret;
1233 }
1234 EXPORT_SYMBOL(ib_init_ah_attr_from_path);
1235
alloc_mad(struct ib_sa_query * query,gfp_t gfp_mask)1236 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1237 {
1238 struct rdma_ah_attr ah_attr;
1239 unsigned long flags;
1240
1241 spin_lock_irqsave(&query->port->ah_lock, flags);
1242 if (!query->port->sm_ah) {
1243 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1244 return -EAGAIN;
1245 }
1246 kref_get(&query->port->sm_ah->ref);
1247 query->sm_ah = query->port->sm_ah;
1248 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1249
1250 /*
1251 * Always check if sm_ah has valid dlid assigned,
1252 * before querying for class port info
1253 */
1254 if ((rdma_query_ah(query->sm_ah->ah, &ah_attr) < 0) ||
1255 !rdma_is_valid_unicast_lid(&ah_attr)) {
1256 kref_put(&query->sm_ah->ref, free_sm_ah);
1257 return -EAGAIN;
1258 }
1259 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1260 query->sm_ah->pkey_index,
1261 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
1262 gfp_mask,
1263 ((query->flags & IB_SA_QUERY_OPA) ?
1264 OPA_MGMT_BASE_VERSION :
1265 IB_MGMT_BASE_VERSION));
1266 if (IS_ERR(query->mad_buf)) {
1267 kref_put(&query->sm_ah->ref, free_sm_ah);
1268 return -ENOMEM;
1269 }
1270
1271 query->mad_buf->ah = query->sm_ah->ah;
1272
1273 return 0;
1274 }
1275
free_mad(struct ib_sa_query * query)1276 static void free_mad(struct ib_sa_query *query)
1277 {
1278 ib_free_send_mad(query->mad_buf);
1279 kref_put(&query->sm_ah->ref, free_sm_ah);
1280 }
1281
init_mad(struct ib_sa_query * query,struct ib_mad_agent * agent)1282 static void init_mad(struct ib_sa_query *query, struct ib_mad_agent *agent)
1283 {
1284 struct ib_sa_mad *mad = query->mad_buf->mad;
1285 unsigned long flags;
1286
1287 memset(mad, 0, sizeof *mad);
1288
1289 if (query->flags & IB_SA_QUERY_OPA) {
1290 mad->mad_hdr.base_version = OPA_MGMT_BASE_VERSION;
1291 mad->mad_hdr.class_version = OPA_SA_CLASS_VERSION;
1292 } else {
1293 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
1294 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1295 }
1296 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
1297 spin_lock_irqsave(&tid_lock, flags);
1298 mad->mad_hdr.tid =
1299 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1300 spin_unlock_irqrestore(&tid_lock, flags);
1301 }
1302
send_mad(struct ib_sa_query * query,unsigned long timeout_ms,gfp_t gfp_mask)1303 static int send_mad(struct ib_sa_query *query, unsigned long timeout_ms,
1304 gfp_t gfp_mask)
1305 {
1306 unsigned long flags;
1307 int ret, id;
1308 const int nmbr_sa_query_retries = 10;
1309
1310 xa_lock_irqsave(&queries, flags);
1311 ret = __xa_alloc(&queries, &id, query, xa_limit_32b, gfp_mask);
1312 xa_unlock_irqrestore(&queries, flags);
1313 if (ret < 0)
1314 return ret;
1315
1316 query->mad_buf->timeout_ms = timeout_ms / nmbr_sa_query_retries;
1317 query->mad_buf->retries = nmbr_sa_query_retries;
1318 if (!query->mad_buf->timeout_ms) {
1319 /* Special case, very small timeout_ms */
1320 query->mad_buf->timeout_ms = 1;
1321 query->mad_buf->retries = timeout_ms;
1322 }
1323 query->mad_buf->context[0] = query;
1324 query->id = id;
1325
1326 if ((query->flags & IB_SA_ENABLE_LOCAL_SERVICE) &&
1327 (!(query->flags & IB_SA_QUERY_OPA))) {
1328 if (rdma_nl_chk_listeners(RDMA_NL_GROUP_LS)) {
1329 if (!ib_nl_make_request(query, gfp_mask))
1330 return id;
1331 }
1332 ib_sa_disable_local_svc(query);
1333 }
1334
1335 ret = ib_post_send_mad(query->mad_buf, NULL);
1336 if (ret) {
1337 xa_lock_irqsave(&queries, flags);
1338 __xa_erase(&queries, id);
1339 xa_unlock_irqrestore(&queries, flags);
1340 }
1341
1342 /*
1343 * It's not safe to dereference query any more, because the
1344 * send may already have completed and freed the query in
1345 * another context.
1346 */
1347 return ret ? ret : id;
1348 }
1349
ib_sa_unpack_path(void * attribute,struct sa_path_rec * rec)1350 void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec)
1351 {
1352 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1353 }
1354 EXPORT_SYMBOL(ib_sa_unpack_path);
1355
ib_sa_pack_path(struct sa_path_rec * rec,void * attribute)1356 void ib_sa_pack_path(struct sa_path_rec *rec, void *attribute)
1357 {
1358 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1359 }
1360 EXPORT_SYMBOL(ib_sa_pack_path);
1361
ib_sa_opa_pathrecord_support(struct ib_sa_client * client,struct ib_sa_device * sa_dev,u32 port_num)1362 static bool ib_sa_opa_pathrecord_support(struct ib_sa_client *client,
1363 struct ib_sa_device *sa_dev,
1364 u32 port_num)
1365 {
1366 struct ib_sa_port *port;
1367 unsigned long flags;
1368 bool ret = false;
1369
1370 port = &sa_dev->port[port_num - sa_dev->start_port];
1371 spin_lock_irqsave(&port->classport_lock, flags);
1372 if (!port->classport_info.valid)
1373 goto ret;
1374
1375 if (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_OPA)
1376 ret = opa_get_cpi_capmask2(&port->classport_info.data.opa) &
1377 OPA_CLASS_PORT_INFO_PR_SUPPORT;
1378 ret:
1379 spin_unlock_irqrestore(&port->classport_lock, flags);
1380 return ret;
1381 }
1382
1383 enum opa_pr_supported {
1384 PR_NOT_SUPPORTED,
1385 PR_OPA_SUPPORTED,
1386 PR_IB_SUPPORTED
1387 };
1388
1389 /*
1390 * opa_pr_query_possible - Check if current PR query can be an OPA query.
1391 *
1392 * Retuns PR_NOT_SUPPORTED if a path record query is not
1393 * possible, PR_OPA_SUPPORTED if an OPA path record query
1394 * is possible and PR_IB_SUPPORTED if an IB path record
1395 * query is possible.
1396 */
opa_pr_query_possible(struct ib_sa_client * client,struct ib_sa_device * sa_dev,struct ib_device * device,u32 port_num)1397 static int opa_pr_query_possible(struct ib_sa_client *client,
1398 struct ib_sa_device *sa_dev,
1399 struct ib_device *device, u32 port_num)
1400 {
1401 struct ib_port_attr port_attr;
1402
1403 if (ib_query_port(device, port_num, &port_attr))
1404 return PR_NOT_SUPPORTED;
1405
1406 if (ib_sa_opa_pathrecord_support(client, sa_dev, port_num))
1407 return PR_OPA_SUPPORTED;
1408
1409 if (port_attr.lid >= be16_to_cpu(IB_MULTICAST_LID_BASE))
1410 return PR_NOT_SUPPORTED;
1411 else
1412 return PR_IB_SUPPORTED;
1413 }
1414
ib_sa_path_rec_callback(struct ib_sa_query * sa_query,int status,struct ib_sa_mad * mad)1415 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1416 int status,
1417 struct ib_sa_mad *mad)
1418 {
1419 struct ib_sa_path_query *query =
1420 container_of(sa_query, struct ib_sa_path_query, sa_query);
1421
1422 if (mad) {
1423 struct sa_path_rec rec;
1424
1425 if (sa_query->flags & IB_SA_QUERY_OPA) {
1426 ib_unpack(opa_path_rec_table,
1427 ARRAY_SIZE(opa_path_rec_table),
1428 mad->data, &rec);
1429 rec.rec_type = SA_PATH_REC_TYPE_OPA;
1430 query->callback(status, &rec, query->context);
1431 } else {
1432 ib_unpack(path_rec_table,
1433 ARRAY_SIZE(path_rec_table),
1434 mad->data, &rec);
1435 rec.rec_type = SA_PATH_REC_TYPE_IB;
1436 sa_path_set_dmac_zero(&rec);
1437
1438 if (query->conv_pr) {
1439 struct sa_path_rec opa;
1440
1441 memset(&opa, 0, sizeof(struct sa_path_rec));
1442 sa_convert_path_ib_to_opa(&opa, &rec);
1443 query->callback(status, &opa, query->context);
1444 } else {
1445 query->callback(status, &rec, query->context);
1446 }
1447 }
1448 } else
1449 query->callback(status, NULL, query->context);
1450 }
1451
ib_sa_path_rec_release(struct ib_sa_query * sa_query)1452 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1453 {
1454 struct ib_sa_path_query *query =
1455 container_of(sa_query, struct ib_sa_path_query, sa_query);
1456
1457 kfree(query->conv_pr);
1458 kfree(query);
1459 }
1460
1461 /**
1462 * ib_sa_path_rec_get - Start a Path get query
1463 * @client:SA client
1464 * @device:device to send query on
1465 * @port_num: port number to send query on
1466 * @rec:Path Record to send in query
1467 * @comp_mask:component mask to send in query
1468 * @timeout_ms:time to wait for response
1469 * @gfp_mask:GFP mask to use for internal allocations
1470 * @callback:function called when query completes, times out or is
1471 * canceled
1472 * @context:opaque user context passed to callback
1473 * @sa_query:query context, used to cancel query
1474 *
1475 * Send a Path Record Get query to the SA to look up a path. The
1476 * callback function will be called when the query completes (or
1477 * fails); status is 0 for a successful response, -EINTR if the query
1478 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1479 * occurred sending the query. The resp parameter of the callback is
1480 * only valid if status is 0.
1481 *
1482 * If the return value of ib_sa_path_rec_get() is negative, it is an
1483 * error code. Otherwise it is a query ID that can be used to cancel
1484 * the query.
1485 */
ib_sa_path_rec_get(struct ib_sa_client * client,struct ib_device * device,u32 port_num,struct sa_path_rec * rec,ib_sa_comp_mask comp_mask,unsigned long timeout_ms,gfp_t gfp_mask,void (* callback)(int status,struct sa_path_rec * resp,void * context),void * context,struct ib_sa_query ** sa_query)1486 int ib_sa_path_rec_get(struct ib_sa_client *client,
1487 struct ib_device *device, u32 port_num,
1488 struct sa_path_rec *rec,
1489 ib_sa_comp_mask comp_mask,
1490 unsigned long timeout_ms, gfp_t gfp_mask,
1491 void (*callback)(int status,
1492 struct sa_path_rec *resp,
1493 void *context),
1494 void *context,
1495 struct ib_sa_query **sa_query)
1496 {
1497 struct ib_sa_path_query *query;
1498 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1499 struct ib_sa_port *port;
1500 struct ib_mad_agent *agent;
1501 struct ib_sa_mad *mad;
1502 enum opa_pr_supported status;
1503 int ret;
1504
1505 if (!sa_dev)
1506 return -ENODEV;
1507
1508 if ((rec->rec_type != SA_PATH_REC_TYPE_IB) &&
1509 (rec->rec_type != SA_PATH_REC_TYPE_OPA))
1510 return -EINVAL;
1511
1512 port = &sa_dev->port[port_num - sa_dev->start_port];
1513 agent = port->agent;
1514
1515 query = kzalloc(sizeof(*query), gfp_mask);
1516 if (!query)
1517 return -ENOMEM;
1518
1519 query->sa_query.port = port;
1520 if (rec->rec_type == SA_PATH_REC_TYPE_OPA) {
1521 status = opa_pr_query_possible(client, sa_dev, device, port_num);
1522 if (status == PR_NOT_SUPPORTED) {
1523 ret = -EINVAL;
1524 goto err1;
1525 } else if (status == PR_OPA_SUPPORTED) {
1526 query->sa_query.flags |= IB_SA_QUERY_OPA;
1527 } else {
1528 query->conv_pr =
1529 kmalloc(sizeof(*query->conv_pr), gfp_mask);
1530 if (!query->conv_pr) {
1531 ret = -ENOMEM;
1532 goto err1;
1533 }
1534 }
1535 }
1536
1537 ret = alloc_mad(&query->sa_query, gfp_mask);
1538 if (ret)
1539 goto err2;
1540
1541 ib_sa_client_get(client);
1542 query->sa_query.client = client;
1543 query->callback = callback;
1544 query->context = context;
1545
1546 mad = query->sa_query.mad_buf->mad;
1547 init_mad(&query->sa_query, agent);
1548
1549 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1550 query->sa_query.release = ib_sa_path_rec_release;
1551 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1552 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1553 mad->sa_hdr.comp_mask = comp_mask;
1554
1555 if (query->sa_query.flags & IB_SA_QUERY_OPA) {
1556 ib_pack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table),
1557 rec, mad->data);
1558 } else if (query->conv_pr) {
1559 sa_convert_path_opa_to_ib(query->conv_pr, rec);
1560 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1561 query->conv_pr, mad->data);
1562 } else {
1563 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1564 rec, mad->data);
1565 }
1566
1567 *sa_query = &query->sa_query;
1568
1569 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1570 query->sa_query.mad_buf->context[1] = (query->conv_pr) ?
1571 query->conv_pr : rec;
1572
1573 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1574 if (ret < 0)
1575 goto err3;
1576
1577 return ret;
1578
1579 err3:
1580 *sa_query = NULL;
1581 ib_sa_client_put(query->sa_query.client);
1582 free_mad(&query->sa_query);
1583 err2:
1584 kfree(query->conv_pr);
1585 err1:
1586 kfree(query);
1587 return ret;
1588 }
1589 EXPORT_SYMBOL(ib_sa_path_rec_get);
1590
ib_sa_mcmember_rec_callback(struct ib_sa_query * sa_query,int status,struct ib_sa_mad * mad)1591 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1592 int status,
1593 struct ib_sa_mad *mad)
1594 {
1595 struct ib_sa_mcmember_query *query =
1596 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1597
1598 if (mad) {
1599 struct ib_sa_mcmember_rec rec;
1600
1601 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1602 mad->data, &rec);
1603 query->callback(status, &rec, query->context);
1604 } else
1605 query->callback(status, NULL, query->context);
1606 }
1607
ib_sa_mcmember_rec_release(struct ib_sa_query * sa_query)1608 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1609 {
1610 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1611 }
1612
ib_sa_mcmember_rec_query(struct ib_sa_client * client,struct ib_device * device,u32 port_num,u8 method,struct ib_sa_mcmember_rec * rec,ib_sa_comp_mask comp_mask,unsigned long timeout_ms,gfp_t gfp_mask,void (* callback)(int status,struct ib_sa_mcmember_rec * resp,void * context),void * context,struct ib_sa_query ** sa_query)1613 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1614 struct ib_device *device, u32 port_num,
1615 u8 method,
1616 struct ib_sa_mcmember_rec *rec,
1617 ib_sa_comp_mask comp_mask,
1618 unsigned long timeout_ms, gfp_t gfp_mask,
1619 void (*callback)(int status,
1620 struct ib_sa_mcmember_rec *resp,
1621 void *context),
1622 void *context,
1623 struct ib_sa_query **sa_query)
1624 {
1625 struct ib_sa_mcmember_query *query;
1626 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1627 struct ib_sa_port *port;
1628 struct ib_mad_agent *agent;
1629 struct ib_sa_mad *mad;
1630 int ret;
1631
1632 if (!sa_dev)
1633 return -ENODEV;
1634
1635 port = &sa_dev->port[port_num - sa_dev->start_port];
1636 agent = port->agent;
1637
1638 query = kzalloc(sizeof(*query), gfp_mask);
1639 if (!query)
1640 return -ENOMEM;
1641
1642 query->sa_query.port = port;
1643 ret = alloc_mad(&query->sa_query, gfp_mask);
1644 if (ret)
1645 goto err1;
1646
1647 ib_sa_client_get(client);
1648 query->sa_query.client = client;
1649 query->callback = callback;
1650 query->context = context;
1651
1652 mad = query->sa_query.mad_buf->mad;
1653 init_mad(&query->sa_query, agent);
1654
1655 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1656 query->sa_query.release = ib_sa_mcmember_rec_release;
1657 mad->mad_hdr.method = method;
1658 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1659 mad->sa_hdr.comp_mask = comp_mask;
1660
1661 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1662 rec, mad->data);
1663
1664 *sa_query = &query->sa_query;
1665
1666 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1667 if (ret < 0)
1668 goto err2;
1669
1670 return ret;
1671
1672 err2:
1673 *sa_query = NULL;
1674 ib_sa_client_put(query->sa_query.client);
1675 free_mad(&query->sa_query);
1676
1677 err1:
1678 kfree(query);
1679 return ret;
1680 }
1681
1682 /* Support GuidInfoRecord */
ib_sa_guidinfo_rec_callback(struct ib_sa_query * sa_query,int status,struct ib_sa_mad * mad)1683 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1684 int status,
1685 struct ib_sa_mad *mad)
1686 {
1687 struct ib_sa_guidinfo_query *query =
1688 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1689
1690 if (mad) {
1691 struct ib_sa_guidinfo_rec rec;
1692
1693 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1694 mad->data, &rec);
1695 query->callback(status, &rec, query->context);
1696 } else
1697 query->callback(status, NULL, query->context);
1698 }
1699
ib_sa_guidinfo_rec_release(struct ib_sa_query * sa_query)1700 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1701 {
1702 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1703 }
1704
ib_sa_guid_info_rec_query(struct ib_sa_client * client,struct ib_device * device,u32 port_num,struct ib_sa_guidinfo_rec * rec,ib_sa_comp_mask comp_mask,u8 method,unsigned long timeout_ms,gfp_t gfp_mask,void (* callback)(int status,struct ib_sa_guidinfo_rec * resp,void * context),void * context,struct ib_sa_query ** sa_query)1705 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1706 struct ib_device *device, u32 port_num,
1707 struct ib_sa_guidinfo_rec *rec,
1708 ib_sa_comp_mask comp_mask, u8 method,
1709 unsigned long timeout_ms, gfp_t gfp_mask,
1710 void (*callback)(int status,
1711 struct ib_sa_guidinfo_rec *resp,
1712 void *context),
1713 void *context,
1714 struct ib_sa_query **sa_query)
1715 {
1716 struct ib_sa_guidinfo_query *query;
1717 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1718 struct ib_sa_port *port;
1719 struct ib_mad_agent *agent;
1720 struct ib_sa_mad *mad;
1721 int ret;
1722
1723 if (!sa_dev)
1724 return -ENODEV;
1725
1726 if (method != IB_MGMT_METHOD_GET &&
1727 method != IB_MGMT_METHOD_SET &&
1728 method != IB_SA_METHOD_DELETE) {
1729 return -EINVAL;
1730 }
1731
1732 port = &sa_dev->port[port_num - sa_dev->start_port];
1733 agent = port->agent;
1734
1735 query = kzalloc(sizeof(*query), gfp_mask);
1736 if (!query)
1737 return -ENOMEM;
1738
1739 query->sa_query.port = port;
1740 ret = alloc_mad(&query->sa_query, gfp_mask);
1741 if (ret)
1742 goto err1;
1743
1744 ib_sa_client_get(client);
1745 query->sa_query.client = client;
1746 query->callback = callback;
1747 query->context = context;
1748
1749 mad = query->sa_query.mad_buf->mad;
1750 init_mad(&query->sa_query, agent);
1751
1752 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1753 query->sa_query.release = ib_sa_guidinfo_rec_release;
1754
1755 mad->mad_hdr.method = method;
1756 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1757 mad->sa_hdr.comp_mask = comp_mask;
1758
1759 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1760 mad->data);
1761
1762 *sa_query = &query->sa_query;
1763
1764 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1765 if (ret < 0)
1766 goto err2;
1767
1768 return ret;
1769
1770 err2:
1771 *sa_query = NULL;
1772 ib_sa_client_put(query->sa_query.client);
1773 free_mad(&query->sa_query);
1774
1775 err1:
1776 kfree(query);
1777 return ret;
1778 }
1779 EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
1780
1781 struct ib_classport_info_context {
1782 struct completion done;
1783 struct ib_sa_query *sa_query;
1784 };
1785
ib_classportinfo_cb(void * context)1786 static void ib_classportinfo_cb(void *context)
1787 {
1788 struct ib_classport_info_context *cb_ctx = context;
1789
1790 complete(&cb_ctx->done);
1791 }
1792
ib_sa_classport_info_rec_callback(struct ib_sa_query * sa_query,int status,struct ib_sa_mad * mad)1793 static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
1794 int status,
1795 struct ib_sa_mad *mad)
1796 {
1797 unsigned long flags;
1798 struct ib_sa_classport_info_query *query =
1799 container_of(sa_query, struct ib_sa_classport_info_query, sa_query);
1800 struct ib_sa_classport_cache *info = &sa_query->port->classport_info;
1801
1802 if (mad) {
1803 if (sa_query->flags & IB_SA_QUERY_OPA) {
1804 struct opa_class_port_info rec;
1805
1806 ib_unpack(opa_classport_info_rec_table,
1807 ARRAY_SIZE(opa_classport_info_rec_table),
1808 mad->data, &rec);
1809
1810 spin_lock_irqsave(&sa_query->port->classport_lock,
1811 flags);
1812 if (!status && !info->valid) {
1813 memcpy(&info->data.opa, &rec,
1814 sizeof(info->data.opa));
1815
1816 info->valid = true;
1817 info->data.type = RDMA_CLASS_PORT_INFO_OPA;
1818 }
1819 spin_unlock_irqrestore(&sa_query->port->classport_lock,
1820 flags);
1821
1822 } else {
1823 struct ib_class_port_info rec;
1824
1825 ib_unpack(ib_classport_info_rec_table,
1826 ARRAY_SIZE(ib_classport_info_rec_table),
1827 mad->data, &rec);
1828
1829 spin_lock_irqsave(&sa_query->port->classport_lock,
1830 flags);
1831 if (!status && !info->valid) {
1832 memcpy(&info->data.ib, &rec,
1833 sizeof(info->data.ib));
1834
1835 info->valid = true;
1836 info->data.type = RDMA_CLASS_PORT_INFO_IB;
1837 }
1838 spin_unlock_irqrestore(&sa_query->port->classport_lock,
1839 flags);
1840 }
1841 }
1842 query->callback(query->context);
1843 }
1844
ib_sa_classport_info_rec_release(struct ib_sa_query * sa_query)1845 static void ib_sa_classport_info_rec_release(struct ib_sa_query *sa_query)
1846 {
1847 kfree(container_of(sa_query, struct ib_sa_classport_info_query,
1848 sa_query));
1849 }
1850
ib_sa_classport_info_rec_query(struct ib_sa_port * port,unsigned long timeout_ms,void (* callback)(void * context),void * context,struct ib_sa_query ** sa_query)1851 static int ib_sa_classport_info_rec_query(struct ib_sa_port *port,
1852 unsigned long timeout_ms,
1853 void (*callback)(void *context),
1854 void *context,
1855 struct ib_sa_query **sa_query)
1856 {
1857 struct ib_mad_agent *agent;
1858 struct ib_sa_classport_info_query *query;
1859 struct ib_sa_mad *mad;
1860 gfp_t gfp_mask = GFP_KERNEL;
1861 int ret;
1862
1863 agent = port->agent;
1864
1865 query = kzalloc(sizeof(*query), gfp_mask);
1866 if (!query)
1867 return -ENOMEM;
1868
1869 query->sa_query.port = port;
1870 query->sa_query.flags |= rdma_cap_opa_ah(port->agent->device,
1871 port->port_num) ?
1872 IB_SA_QUERY_OPA : 0;
1873 ret = alloc_mad(&query->sa_query, gfp_mask);
1874 if (ret)
1875 goto err_free;
1876
1877 query->callback = callback;
1878 query->context = context;
1879
1880 mad = query->sa_query.mad_buf->mad;
1881 init_mad(&query->sa_query, agent);
1882
1883 query->sa_query.callback = ib_sa_classport_info_rec_callback;
1884 query->sa_query.release = ib_sa_classport_info_rec_release;
1885 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1886 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO);
1887 mad->sa_hdr.comp_mask = 0;
1888 *sa_query = &query->sa_query;
1889
1890 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1891 if (ret < 0)
1892 goto err_free_mad;
1893
1894 return ret;
1895
1896 err_free_mad:
1897 *sa_query = NULL;
1898 free_mad(&query->sa_query);
1899
1900 err_free:
1901 kfree(query);
1902 return ret;
1903 }
1904
update_ib_cpi(struct work_struct * work)1905 static void update_ib_cpi(struct work_struct *work)
1906 {
1907 struct ib_sa_port *port =
1908 container_of(work, struct ib_sa_port, ib_cpi_work.work);
1909 struct ib_classport_info_context *cb_context;
1910 unsigned long flags;
1911 int ret;
1912
1913 /* If the classport info is valid, nothing
1914 * to do here.
1915 */
1916 spin_lock_irqsave(&port->classport_lock, flags);
1917 if (port->classport_info.valid) {
1918 spin_unlock_irqrestore(&port->classport_lock, flags);
1919 return;
1920 }
1921 spin_unlock_irqrestore(&port->classport_lock, flags);
1922
1923 cb_context = kmalloc(sizeof(*cb_context), GFP_KERNEL);
1924 if (!cb_context)
1925 goto err_nomem;
1926
1927 init_completion(&cb_context->done);
1928
1929 ret = ib_sa_classport_info_rec_query(port, 3000,
1930 ib_classportinfo_cb, cb_context,
1931 &cb_context->sa_query);
1932 if (ret < 0)
1933 goto free_cb_err;
1934 wait_for_completion(&cb_context->done);
1935 free_cb_err:
1936 kfree(cb_context);
1937 spin_lock_irqsave(&port->classport_lock, flags);
1938
1939 /* If the classport info is still not valid, the query should have
1940 * failed for some reason. Retry issuing the query
1941 */
1942 if (!port->classport_info.valid) {
1943 port->classport_info.retry_cnt++;
1944 if (port->classport_info.retry_cnt <=
1945 IB_SA_CPI_MAX_RETRY_CNT) {
1946 unsigned long delay =
1947 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
1948
1949 queue_delayed_work(ib_wq, &port->ib_cpi_work, delay);
1950 }
1951 }
1952 spin_unlock_irqrestore(&port->classport_lock, flags);
1953
1954 err_nomem:
1955 return;
1956 }
1957
send_handler(struct ib_mad_agent * agent,struct ib_mad_send_wc * mad_send_wc)1958 static void send_handler(struct ib_mad_agent *agent,
1959 struct ib_mad_send_wc *mad_send_wc)
1960 {
1961 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
1962 unsigned long flags;
1963
1964 if (query->callback)
1965 switch (mad_send_wc->status) {
1966 case IB_WC_SUCCESS:
1967 /* No callback -- already got recv */
1968 break;
1969 case IB_WC_RESP_TIMEOUT_ERR:
1970 query->callback(query, -ETIMEDOUT, NULL);
1971 break;
1972 case IB_WC_WR_FLUSH_ERR:
1973 query->callback(query, -EINTR, NULL);
1974 break;
1975 default:
1976 query->callback(query, -EIO, NULL);
1977 break;
1978 }
1979
1980 xa_lock_irqsave(&queries, flags);
1981 __xa_erase(&queries, query->id);
1982 xa_unlock_irqrestore(&queries, flags);
1983
1984 free_mad(query);
1985 if (query->client)
1986 ib_sa_client_put(query->client);
1987 query->release(query);
1988 }
1989
recv_handler(struct ib_mad_agent * mad_agent,struct ib_mad_send_buf * send_buf,struct ib_mad_recv_wc * mad_recv_wc)1990 static void recv_handler(struct ib_mad_agent *mad_agent,
1991 struct ib_mad_send_buf *send_buf,
1992 struct ib_mad_recv_wc *mad_recv_wc)
1993 {
1994 struct ib_sa_query *query;
1995
1996 if (!send_buf)
1997 return;
1998
1999 query = send_buf->context[0];
2000 if (query->callback) {
2001 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
2002 query->callback(query,
2003 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
2004 -EINVAL : 0,
2005 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
2006 else
2007 query->callback(query, -EIO, NULL);
2008 }
2009
2010 ib_free_recv_mad(mad_recv_wc);
2011 }
2012
update_sm_ah(struct work_struct * work)2013 static void update_sm_ah(struct work_struct *work)
2014 {
2015 struct ib_sa_port *port =
2016 container_of(work, struct ib_sa_port, update_task);
2017 struct ib_sa_sm_ah *new_ah;
2018 struct ib_port_attr port_attr;
2019 struct rdma_ah_attr ah_attr;
2020 bool grh_required;
2021
2022 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
2023 pr_warn("Couldn't query port\n");
2024 return;
2025 }
2026
2027 new_ah = kmalloc(sizeof(*new_ah), GFP_KERNEL);
2028 if (!new_ah)
2029 return;
2030
2031 kref_init(&new_ah->ref);
2032 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
2033
2034 new_ah->pkey_index = 0;
2035 if (ib_find_pkey(port->agent->device, port->port_num,
2036 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
2037 pr_err("Couldn't find index for default PKey\n");
2038
2039 memset(&ah_attr, 0, sizeof(ah_attr));
2040 ah_attr.type = rdma_ah_find_type(port->agent->device,
2041 port->port_num);
2042 rdma_ah_set_dlid(&ah_attr, port_attr.sm_lid);
2043 rdma_ah_set_sl(&ah_attr, port_attr.sm_sl);
2044 rdma_ah_set_port_num(&ah_attr, port->port_num);
2045
2046 grh_required = rdma_is_grh_required(port->agent->device,
2047 port->port_num);
2048
2049 /*
2050 * The OPA sm_lid of 0xFFFF needs special handling so that it can be
2051 * differentiated from a permissive LID of 0xFFFF. We set the
2052 * grh_required flag here so the SA can program the DGID in the
2053 * address handle appropriately
2054 */
2055 if (ah_attr.type == RDMA_AH_ATTR_TYPE_OPA &&
2056 (grh_required ||
2057 port_attr.sm_lid == be16_to_cpu(IB_LID_PERMISSIVE)))
2058 rdma_ah_set_make_grd(&ah_attr, true);
2059
2060 if (ah_attr.type == RDMA_AH_ATTR_TYPE_IB && grh_required) {
2061 rdma_ah_set_ah_flags(&ah_attr, IB_AH_GRH);
2062 rdma_ah_set_subnet_prefix(&ah_attr,
2063 cpu_to_be64(port_attr.subnet_prefix));
2064 rdma_ah_set_interface_id(&ah_attr,
2065 cpu_to_be64(IB_SA_WELL_KNOWN_GUID));
2066 }
2067
2068 new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr,
2069 RDMA_CREATE_AH_SLEEPABLE);
2070 if (IS_ERR(new_ah->ah)) {
2071 pr_warn("Couldn't create new SM AH\n");
2072 kfree(new_ah);
2073 return;
2074 }
2075
2076 spin_lock_irq(&port->ah_lock);
2077 if (port->sm_ah)
2078 kref_put(&port->sm_ah->ref, free_sm_ah);
2079 port->sm_ah = new_ah;
2080 spin_unlock_irq(&port->ah_lock);
2081 }
2082
ib_sa_event(struct ib_event_handler * handler,struct ib_event * event)2083 static void ib_sa_event(struct ib_event_handler *handler,
2084 struct ib_event *event)
2085 {
2086 if (event->event == IB_EVENT_PORT_ERR ||
2087 event->event == IB_EVENT_PORT_ACTIVE ||
2088 event->event == IB_EVENT_LID_CHANGE ||
2089 event->event == IB_EVENT_PKEY_CHANGE ||
2090 event->event == IB_EVENT_SM_CHANGE ||
2091 event->event == IB_EVENT_CLIENT_REREGISTER) {
2092 unsigned long flags;
2093 struct ib_sa_device *sa_dev =
2094 container_of(handler, typeof(*sa_dev), event_handler);
2095 u32 port_num = event->element.port_num - sa_dev->start_port;
2096 struct ib_sa_port *port = &sa_dev->port[port_num];
2097
2098 if (!rdma_cap_ib_sa(handler->device, port->port_num))
2099 return;
2100
2101 spin_lock_irqsave(&port->ah_lock, flags);
2102 if (port->sm_ah)
2103 kref_put(&port->sm_ah->ref, free_sm_ah);
2104 port->sm_ah = NULL;
2105 spin_unlock_irqrestore(&port->ah_lock, flags);
2106
2107 if (event->event == IB_EVENT_SM_CHANGE ||
2108 event->event == IB_EVENT_CLIENT_REREGISTER ||
2109 event->event == IB_EVENT_LID_CHANGE ||
2110 event->event == IB_EVENT_PORT_ACTIVE) {
2111 unsigned long delay =
2112 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2113
2114 spin_lock_irqsave(&port->classport_lock, flags);
2115 port->classport_info.valid = false;
2116 port->classport_info.retry_cnt = 0;
2117 spin_unlock_irqrestore(&port->classport_lock, flags);
2118 queue_delayed_work(ib_wq,
2119 &port->ib_cpi_work, delay);
2120 }
2121 queue_work(ib_wq, &sa_dev->port[port_num].update_task);
2122 }
2123 }
2124
ib_sa_add_one(struct ib_device * device)2125 static int ib_sa_add_one(struct ib_device *device)
2126 {
2127 struct ib_sa_device *sa_dev;
2128 int s, e, i;
2129 int count = 0;
2130 int ret;
2131
2132 s = rdma_start_port(device);
2133 e = rdma_end_port(device);
2134
2135 sa_dev = kzalloc(struct_size(sa_dev, port, e - s + 1), GFP_KERNEL);
2136 if (!sa_dev)
2137 return -ENOMEM;
2138
2139 sa_dev->start_port = s;
2140 sa_dev->end_port = e;
2141
2142 for (i = 0; i <= e - s; ++i) {
2143 spin_lock_init(&sa_dev->port[i].ah_lock);
2144 if (!rdma_cap_ib_sa(device, i + 1))
2145 continue;
2146
2147 sa_dev->port[i].sm_ah = NULL;
2148 sa_dev->port[i].port_num = i + s;
2149
2150 spin_lock_init(&sa_dev->port[i].classport_lock);
2151 sa_dev->port[i].classport_info.valid = false;
2152
2153 sa_dev->port[i].agent =
2154 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
2155 NULL, 0, send_handler,
2156 recv_handler, sa_dev, 0);
2157 if (IS_ERR(sa_dev->port[i].agent)) {
2158 ret = PTR_ERR(sa_dev->port[i].agent);
2159 goto err;
2160 }
2161
2162 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
2163 INIT_DELAYED_WORK(&sa_dev->port[i].ib_cpi_work,
2164 update_ib_cpi);
2165
2166 count++;
2167 }
2168
2169 if (!count) {
2170 ret = -EOPNOTSUPP;
2171 goto free;
2172 }
2173
2174 ib_set_client_data(device, &sa_client, sa_dev);
2175
2176 /*
2177 * We register our event handler after everything is set up,
2178 * and then update our cached info after the event handler is
2179 * registered to avoid any problems if a port changes state
2180 * during our initialization.
2181 */
2182
2183 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
2184 ib_register_event_handler(&sa_dev->event_handler);
2185
2186 for (i = 0; i <= e - s; ++i) {
2187 if (rdma_cap_ib_sa(device, i + 1))
2188 update_sm_ah(&sa_dev->port[i].update_task);
2189 }
2190
2191 return 0;
2192
2193 err:
2194 while (--i >= 0) {
2195 if (rdma_cap_ib_sa(device, i + 1))
2196 ib_unregister_mad_agent(sa_dev->port[i].agent);
2197 }
2198 free:
2199 kfree(sa_dev);
2200 return ret;
2201 }
2202
ib_sa_remove_one(struct ib_device * device,void * client_data)2203 static void ib_sa_remove_one(struct ib_device *device, void *client_data)
2204 {
2205 struct ib_sa_device *sa_dev = client_data;
2206 int i;
2207
2208 ib_unregister_event_handler(&sa_dev->event_handler);
2209 flush_workqueue(ib_wq);
2210
2211 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
2212 if (rdma_cap_ib_sa(device, i + 1)) {
2213 cancel_delayed_work_sync(&sa_dev->port[i].ib_cpi_work);
2214 ib_unregister_mad_agent(sa_dev->port[i].agent);
2215 if (sa_dev->port[i].sm_ah)
2216 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
2217 }
2218
2219 }
2220
2221 kfree(sa_dev);
2222 }
2223
ib_sa_init(void)2224 int ib_sa_init(void)
2225 {
2226 int ret;
2227
2228 get_random_bytes(&tid, sizeof tid);
2229
2230 atomic_set(&ib_nl_sa_request_seq, 0);
2231
2232 ret = ib_register_client(&sa_client);
2233 if (ret) {
2234 pr_err("Couldn't register ib_sa client\n");
2235 goto err1;
2236 }
2237
2238 ret = mcast_init();
2239 if (ret) {
2240 pr_err("Couldn't initialize multicast handling\n");
2241 goto err2;
2242 }
2243
2244 ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM);
2245 if (!ib_nl_wq) {
2246 ret = -ENOMEM;
2247 goto err3;
2248 }
2249
2250 INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
2251
2252 return 0;
2253
2254 err3:
2255 mcast_cleanup();
2256 err2:
2257 ib_unregister_client(&sa_client);
2258 err1:
2259 return ret;
2260 }
2261
ib_sa_cleanup(void)2262 void ib_sa_cleanup(void)
2263 {
2264 cancel_delayed_work(&ib_nl_timed_work);
2265 flush_workqueue(ib_nl_wq);
2266 destroy_workqueue(ib_nl_wq);
2267 mcast_cleanup();
2268 ib_unregister_client(&sa_client);
2269 WARN_ON(!xa_empty(&queries));
2270 }
2271
