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35#include <linux/module.h>
36#include <linux/init.h>
37#include <linux/err.h>
38#include <linux/random.h>
39#include <linux/spinlock.h>
40#include <linux/slab.h>
41#include <linux/dma-mapping.h>
42#include <linux/kref.h>
43#include <linux/idr.h>
44#include <linux/workqueue.h>
45#include <uapi/linux/if_ether.h>
46#include <rdma/ib_pack.h>
47#include <rdma/ib_cache.h>
48#include <rdma/rdma_netlink.h>
49#include <net/netlink.h>
50#include <uapi/rdma/ib_user_sa.h>
51#include <rdma/ib_marshall.h>
52#include <rdma/ib_addr.h>
53#include <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
62static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT;
63
64struct ib_sa_sm_ah {
65 struct ib_ah *ah;
66 struct kref ref;
67 u16 pkey_index;
68 u8 src_path_mask;
69};
70
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
84struct ib_sa_classport_cache {
85 bool valid;
86 int retry_cnt;
87 struct rdma_class_port_info data;
88};
89
90struct 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;
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 *);
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;
117 u32 seq;
118 unsigned long timeout;
119 u8 path_use;
120};
121
122#define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001
123#define IB_SA_CANCEL 0x00000002
124#define IB_SA_QUERY_OPA 0x00000004
125
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
132struct ib_sa_path_query {
133 void (*callback)(int, struct sa_path_rec *, void *);
134 void *context;
135 struct ib_sa_query sa_query;
136 struct sa_path_rec *conv_pr;
137};
138
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
145struct ib_sa_classport_info_query {
146 void (*callback)(void *);
147 void *context;
148 struct ib_sa_query sa_query;
149};
150
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
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
177static void ib_sa_add_one(struct ib_device *device);
178static void ib_sa_remove_one(struct ib_device *device, void *client_data);
179
180static struct ib_client sa_client = {
181 .name = "sa",
182 .add = ib_sa_add_one,
183 .remove = ib_sa_remove_one
184};
185
186static DEFINE_SPINLOCK(idr_lock);
187static DEFINE_IDR(query_idr);
188
189static DEFINE_SPINLOCK(tid_lock);
190static u32 tid;
191
192#define PATH_REC_FIELD(field) \
193 .struct_offset_bytes = offsetof(struct sa_path_rec, field), \
194 .struct_size_bytes = sizeof((struct sa_path_rec *)0)->field, \
195 .field_name = "sa_path_rec:" #field
196
197static const struct ib_field path_rec_table[] = {
198 { PATH_REC_FIELD(service_id),
199 .offset_words = 0,
200 .offset_bits = 0,
201 .size_bits = 64 },
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 },
210 { PATH_REC_FIELD(ib.dlid),
211 .offset_words = 10,
212 .offset_bits = 0,
213 .size_bits = 16 },
214 { PATH_REC_FIELD(ib.slid),
215 .offset_words = 10,
216 .offset_bits = 16,
217 .size_bits = 16 },
218 { PATH_REC_FIELD(ib.raw_traffic),
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 },
250 { PATH_REC_FIELD(qos_class),
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
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[] = {
300 { OPA_PATH_REC_FIELD(service_id),
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
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
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
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
559static const struct ib_field ib_classport_info_rec_table[] = {
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
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
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
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{
753 struct sa_path_rec *sa_rec = query->mad_buf->context[1];
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
763 header = skb_put(skb, NLMSG_ALIGN(sizeof(*header)));
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
776 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) {
777 val64 = be64_to_cpu(sa_rec->service_id);
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
822
823
824 if (WARN_ON(len == 0))
825 return len;
826
827
828 len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header));
829
830 return len;
831}
832
833static int ib_nl_send_msg(struct ib_sa_query *query, gfp_t gfp_mask)
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
847 skb = nlmsg_new(len, gfp_mask);
848 if (!skb)
849 return -ENOMEM;
850
851
852 data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS,
853 RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST);
854 if (!data) {
855 nlmsg_free(skb);
856 return -EMSGSIZE;
857 }
858
859
860 ib_nl_set_path_rec_attrs(skb, query);
861
862
863 nlmsg_end(skb, nlh);
864
865 ret = rdma_nl_multicast(skb, RDMA_NL_GROUP_LS, gfp_mask);
866 if (!ret)
867 ret = len;
868 else
869 ret = 0;
870
871 return ret;
872}
873
874static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
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
883
884 spin_lock_irqsave(&ib_nl_request_lock, flags);
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
889 if (ib_nl_request_list.next == &query->list)
890 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
891 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
892
893 ret = ib_nl_send_msg(query, gfp_mask);
894 if (ret <= 0) {
895 ret = -EIO;
896
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
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
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
964
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
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
1024int ib_nl_handle_set_timeout(struct sk_buff *skb,
1025 struct nlmsghdr *nlh,
1026 struct netlink_ext_ack *extack)
1027{
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
1036 if (!(nlh->nlmsg_flags & NLM_F_REQUEST) ||
1037 !(NETLINK_CB(skb).sk))
1038 return -EPERM;
1039
1040 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1041 nlmsg_len(nlh), ib_nl_policy, NULL);
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
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),
1093 nlmsg_len(nlh), ib_nl_policy, NULL);
1094 if (ret)
1095 return 0;
1096
1097 return 1;
1098}
1099
1100int ib_nl_handle_resolve_resp(struct sk_buff *skb,
1101 struct nlmsghdr *nlh,
1102 struct netlink_ext_ack *extack)
1103{
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
1111 if ((nlh->nlmsg_flags & NLM_F_REQUEST) ||
1112 !(NETLINK_CB(skb).sk))
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
1119
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
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
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
1159 rdma_destroy_ah(sm_ah->ah);
1160 kfree(sm_ah);
1161}
1162
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
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
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186void ib_sa_cancel_query(int id, struct ib_sa_query *query)
1187{
1188 unsigned long flags;
1189 struct ib_mad_agent *agent;
1190 struct ib_mad_send_buf *mad_buf;
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;
1198 mad_buf = query->mad_buf;
1199 spin_unlock_irqrestore(&idr_lock, flags);
1200
1201
1202
1203
1204
1205
1206 if (!ib_nl_cancel_request(query))
1207 ib_cancel_mad(agent, mad_buf);
1208}
1209EXPORT_SYMBOL(ib_sa_cancel_query);
1210
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
1230int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
1231 struct sa_path_rec *rec,
1232 struct rdma_ah_attr *ah_attr)
1233{
1234 int ret;
1235 u16 gid_index;
1236 int use_roce;
1237 struct net_device *ndev = NULL;
1238
1239 memset(ah_attr, 0, sizeof *ah_attr);
1240 ah_attr->type = rdma_ah_find_type(device, port_num);
1241
1242 rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec)));
1243
1244 if ((ah_attr->type == RDMA_AH_ATTR_TYPE_OPA) &&
1245 (rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE)))
1246 rdma_ah_set_make_grd(ah_attr, true);
1247
1248 rdma_ah_set_sl(ah_attr, rec->sl);
1249 rdma_ah_set_path_bits(ah_attr, be32_to_cpu(sa_path_get_slid(rec)) &
1250 get_src_path_mask(device, port_num));
1251 rdma_ah_set_port_num(ah_attr, port_num);
1252 rdma_ah_set_static_rate(ah_attr, rec->rate);
1253 use_roce = rdma_cap_eth_ah(device, port_num);
1254
1255 if (use_roce) {
1256 struct net_device *idev;
1257 struct net_device *resolved_dev;
1258 struct rdma_dev_addr dev_addr = {
1259 .bound_dev_if = ((sa_path_get_ifindex(rec) >= 0) ?
1260 sa_path_get_ifindex(rec) : 0),
1261 .net = sa_path_get_ndev(rec) ?
1262 sa_path_get_ndev(rec) :
1263 &init_net
1264 };
1265 union {
1266 struct sockaddr _sockaddr;
1267 struct sockaddr_in _sockaddr_in;
1268 struct sockaddr_in6 _sockaddr_in6;
1269 } sgid_addr, dgid_addr;
1270
1271 if (!device->get_netdev)
1272 return -EOPNOTSUPP;
1273
1274 rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid);
1275 rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid);
1276
1277
1278 ret = rdma_resolve_ip_route(&sgid_addr._sockaddr,
1279 &dgid_addr._sockaddr, &dev_addr);
1280 if (ret)
1281 return ret;
1282
1283 if ((dev_addr.network == RDMA_NETWORK_IPV4 ||
1284 dev_addr.network == RDMA_NETWORK_IPV6) &&
1285 rec->rec_type != SA_PATH_REC_TYPE_ROCE_V2)
1286 return -EINVAL;
1287
1288 idev = device->get_netdev(device, port_num);
1289 if (!idev)
1290 return -ENODEV;
1291
1292 resolved_dev = dev_get_by_index(dev_addr.net,
1293 dev_addr.bound_dev_if);
1294 if (resolved_dev->flags & IFF_LOOPBACK) {
1295 dev_put(resolved_dev);
1296 resolved_dev = idev;
1297 dev_hold(resolved_dev);
1298 }
1299 ndev = ib_get_ndev_from_path(rec);
1300 rcu_read_lock();
1301 if ((ndev && ndev != resolved_dev) ||
1302 (resolved_dev != idev &&
1303 !rdma_is_upper_dev_rcu(idev, resolved_dev)))
1304 ret = -EHOSTUNREACH;
1305 rcu_read_unlock();
1306 dev_put(idev);
1307 dev_put(resolved_dev);
1308 if (ret) {
1309 if (ndev)
1310 dev_put(ndev);
1311 return ret;
1312 }
1313 }
1314
1315 if (rec->hop_limit > 0 || use_roce) {
1316 enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec);
1317
1318 ret = ib_find_cached_gid_by_port(device, &rec->sgid, type,
1319 port_num, ndev, &gid_index);
1320 if (ret) {
1321 if (ndev)
1322 dev_put(ndev);
1323 return ret;
1324 }
1325
1326 rdma_ah_set_grh(ah_attr, &rec->dgid,
1327 be32_to_cpu(rec->flow_label),
1328 gid_index, rec->hop_limit,
1329 rec->traffic_class);
1330 if (ndev)
1331 dev_put(ndev);
1332 }
1333
1334 if (use_roce) {
1335 u8 *dmac = sa_path_get_dmac(rec);
1336
1337 if (!dmac)
1338 return -EINVAL;
1339 memcpy(ah_attr->roce.dmac, dmac, ETH_ALEN);
1340 }
1341
1342 return 0;
1343}
1344EXPORT_SYMBOL(ib_init_ah_from_path);
1345
1346static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1347{
1348 unsigned long flags;
1349
1350 spin_lock_irqsave(&query->port->ah_lock, flags);
1351 if (!query->port->sm_ah) {
1352 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1353 return -EAGAIN;
1354 }
1355 kref_get(&query->port->sm_ah->ref);
1356 query->sm_ah = query->port->sm_ah;
1357 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1358
1359 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1360 query->sm_ah->pkey_index,
1361 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
1362 gfp_mask,
1363 ((query->flags & IB_SA_QUERY_OPA) ?
1364 OPA_MGMT_BASE_VERSION :
1365 IB_MGMT_BASE_VERSION));
1366 if (IS_ERR(query->mad_buf)) {
1367 kref_put(&query->sm_ah->ref, free_sm_ah);
1368 return -ENOMEM;
1369 }
1370
1371 query->mad_buf->ah = query->sm_ah->ah;
1372
1373 return 0;
1374}
1375
1376static void free_mad(struct ib_sa_query *query)
1377{
1378 ib_free_send_mad(query->mad_buf);
1379 kref_put(&query->sm_ah->ref, free_sm_ah);
1380}
1381
1382static void init_mad(struct ib_sa_query *query, struct ib_mad_agent *agent)
1383{
1384 struct ib_sa_mad *mad = query->mad_buf->mad;
1385 unsigned long flags;
1386
1387 memset(mad, 0, sizeof *mad);
1388
1389 if (query->flags & IB_SA_QUERY_OPA) {
1390 mad->mad_hdr.base_version = OPA_MGMT_BASE_VERSION;
1391 mad->mad_hdr.class_version = OPA_SA_CLASS_VERSION;
1392 } else {
1393 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
1394 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1395 }
1396 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
1397 spin_lock_irqsave(&tid_lock, flags);
1398 mad->mad_hdr.tid =
1399 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1400 spin_unlock_irqrestore(&tid_lock, flags);
1401}
1402
1403static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
1404{
1405 bool preload = gfpflags_allow_blocking(gfp_mask);
1406 unsigned long flags;
1407 int ret, id;
1408
1409 if (preload)
1410 idr_preload(gfp_mask);
1411 spin_lock_irqsave(&idr_lock, flags);
1412
1413 id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
1414
1415 spin_unlock_irqrestore(&idr_lock, flags);
1416 if (preload)
1417 idr_preload_end();
1418 if (id < 0)
1419 return id;
1420
1421 query->mad_buf->timeout_ms = timeout_ms;
1422 query->mad_buf->context[0] = query;
1423 query->id = id;
1424
1425 if ((query->flags & IB_SA_ENABLE_LOCAL_SERVICE) &&
1426 (!(query->flags & IB_SA_QUERY_OPA))) {
1427 if (!rdma_nl_chk_listeners(RDMA_NL_GROUP_LS)) {
1428 if (!ib_nl_make_request(query, gfp_mask))
1429 return id;
1430 }
1431 ib_sa_disable_local_svc(query);
1432 }
1433
1434 ret = ib_post_send_mad(query->mad_buf, NULL);
1435 if (ret) {
1436 spin_lock_irqsave(&idr_lock, flags);
1437 idr_remove(&query_idr, id);
1438 spin_unlock_irqrestore(&idr_lock, flags);
1439 }
1440
1441
1442
1443
1444
1445
1446 return ret ? ret : id;
1447}
1448
1449void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec)
1450{
1451 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1452}
1453EXPORT_SYMBOL(ib_sa_unpack_path);
1454
1455void ib_sa_pack_path(struct sa_path_rec *rec, void *attribute)
1456{
1457 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1458}
1459EXPORT_SYMBOL(ib_sa_pack_path);
1460
1461static bool ib_sa_opa_pathrecord_support(struct ib_sa_client *client,
1462 struct ib_device *device,
1463 u8 port_num)
1464{
1465 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1466 struct ib_sa_port *port;
1467 unsigned long flags;
1468 bool ret = false;
1469
1470 if (!sa_dev)
1471 return ret;
1472
1473 port = &sa_dev->port[port_num - sa_dev->start_port];
1474 spin_lock_irqsave(&port->classport_lock, flags);
1475 if (!port->classport_info.valid)
1476 goto ret;
1477
1478 if (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_OPA)
1479 ret = opa_get_cpi_capmask2(&port->classport_info.data.opa) &
1480 OPA_CLASS_PORT_INFO_PR_SUPPORT;
1481ret:
1482 spin_unlock_irqrestore(&port->classport_lock, flags);
1483 return ret;
1484}
1485
1486enum opa_pr_supported {
1487 PR_NOT_SUPPORTED,
1488 PR_OPA_SUPPORTED,
1489 PR_IB_SUPPORTED
1490};
1491
1492
1493
1494
1495
1496
1497
1498
1499static int opa_pr_query_possible(struct ib_sa_client *client,
1500 struct ib_device *device,
1501 u8 port_num,
1502 struct sa_path_rec *rec)
1503{
1504 struct ib_port_attr port_attr;
1505
1506 if (ib_query_port(device, port_num, &port_attr))
1507 return PR_NOT_SUPPORTED;
1508
1509 if (ib_sa_opa_pathrecord_support(client, device, port_num))
1510 return PR_OPA_SUPPORTED;
1511
1512 if (port_attr.lid >= be16_to_cpu(IB_MULTICAST_LID_BASE))
1513 return PR_NOT_SUPPORTED;
1514 else
1515 return PR_IB_SUPPORTED;
1516}
1517
1518static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1519 int status,
1520 struct ib_sa_mad *mad)
1521{
1522 struct ib_sa_path_query *query =
1523 container_of(sa_query, struct ib_sa_path_query, sa_query);
1524
1525 if (mad) {
1526 struct sa_path_rec rec;
1527
1528 if (sa_query->flags & IB_SA_QUERY_OPA) {
1529 ib_unpack(opa_path_rec_table,
1530 ARRAY_SIZE(opa_path_rec_table),
1531 mad->data, &rec);
1532 rec.rec_type = SA_PATH_REC_TYPE_OPA;
1533 query->callback(status, &rec, query->context);
1534 } else {
1535 ib_unpack(path_rec_table,
1536 ARRAY_SIZE(path_rec_table),
1537 mad->data, &rec);
1538 rec.rec_type = SA_PATH_REC_TYPE_IB;
1539 sa_path_set_ndev(&rec, NULL);
1540 sa_path_set_ifindex(&rec, 0);
1541 sa_path_set_dmac_zero(&rec);
1542
1543 if (query->conv_pr) {
1544 struct sa_path_rec opa;
1545
1546 memset(&opa, 0, sizeof(struct sa_path_rec));
1547 sa_convert_path_ib_to_opa(&opa, &rec);
1548 query->callback(status, &opa, query->context);
1549 } else {
1550 query->callback(status, &rec, query->context);
1551 }
1552 }
1553 } else
1554 query->callback(status, NULL, query->context);
1555}
1556
1557static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1558{
1559 struct ib_sa_path_query *query =
1560 container_of(sa_query, struct ib_sa_path_query, sa_query);
1561
1562 kfree(query->conv_pr);
1563 kfree(query);
1564}
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591int ib_sa_path_rec_get(struct ib_sa_client *client,
1592 struct ib_device *device, u8 port_num,
1593 struct sa_path_rec *rec,
1594 ib_sa_comp_mask comp_mask,
1595 int timeout_ms, gfp_t gfp_mask,
1596 void (*callback)(int status,
1597 struct sa_path_rec *resp,
1598 void *context),
1599 void *context,
1600 struct ib_sa_query **sa_query)
1601{
1602 struct ib_sa_path_query *query;
1603 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1604 struct ib_sa_port *port;
1605 struct ib_mad_agent *agent;
1606 struct ib_sa_mad *mad;
1607 enum opa_pr_supported status;
1608 int ret;
1609
1610 if (!sa_dev)
1611 return -ENODEV;
1612
1613 if ((rec->rec_type != SA_PATH_REC_TYPE_IB) &&
1614 (rec->rec_type != SA_PATH_REC_TYPE_OPA))
1615 return -EINVAL;
1616
1617 port = &sa_dev->port[port_num - sa_dev->start_port];
1618 agent = port->agent;
1619
1620 query = kzalloc(sizeof(*query), gfp_mask);
1621 if (!query)
1622 return -ENOMEM;
1623
1624 query->sa_query.port = port;
1625 if (rec->rec_type == SA_PATH_REC_TYPE_OPA) {
1626 status = opa_pr_query_possible(client, device, port_num, rec);
1627 if (status == PR_NOT_SUPPORTED) {
1628 ret = -EINVAL;
1629 goto err1;
1630 } else if (status == PR_OPA_SUPPORTED) {
1631 query->sa_query.flags |= IB_SA_QUERY_OPA;
1632 } else {
1633 query->conv_pr =
1634 kmalloc(sizeof(*query->conv_pr), gfp_mask);
1635 if (!query->conv_pr) {
1636 ret = -ENOMEM;
1637 goto err1;
1638 }
1639 }
1640 }
1641
1642 ret = alloc_mad(&query->sa_query, gfp_mask);
1643 if (ret)
1644 goto err2;
1645
1646 ib_sa_client_get(client);
1647 query->sa_query.client = client;
1648 query->callback = callback;
1649 query->context = context;
1650
1651 mad = query->sa_query.mad_buf->mad;
1652 init_mad(&query->sa_query, agent);
1653
1654 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1655 query->sa_query.release = ib_sa_path_rec_release;
1656 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1657 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1658 mad->sa_hdr.comp_mask = comp_mask;
1659
1660 if (query->sa_query.flags & IB_SA_QUERY_OPA) {
1661 ib_pack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table),
1662 rec, mad->data);
1663 } else if (query->conv_pr) {
1664 sa_convert_path_opa_to_ib(query->conv_pr, rec);
1665 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1666 query->conv_pr, mad->data);
1667 } else {
1668 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1669 rec, mad->data);
1670 }
1671
1672 *sa_query = &query->sa_query;
1673
1674 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1675 query->sa_query.mad_buf->context[1] = (query->conv_pr) ?
1676 query->conv_pr : rec;
1677
1678 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1679 if (ret < 0)
1680 goto err3;
1681
1682 return ret;
1683
1684err3:
1685 *sa_query = NULL;
1686 ib_sa_client_put(query->sa_query.client);
1687 free_mad(&query->sa_query);
1688err2:
1689 kfree(query->conv_pr);
1690err1:
1691 kfree(query);
1692 return ret;
1693}
1694EXPORT_SYMBOL(ib_sa_path_rec_get);
1695
1696static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1697 int status,
1698 struct ib_sa_mad *mad)
1699{
1700 struct ib_sa_service_query *query =
1701 container_of(sa_query, struct ib_sa_service_query, sa_query);
1702
1703 if (mad) {
1704 struct ib_sa_service_rec rec;
1705
1706 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1707 mad->data, &rec);
1708 query->callback(status, &rec, query->context);
1709 } else
1710 query->callback(status, NULL, query->context);
1711}
1712
1713static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1714{
1715 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1716}
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745int ib_sa_service_rec_query(struct ib_sa_client *client,
1746 struct ib_device *device, u8 port_num, u8 method,
1747 struct ib_sa_service_rec *rec,
1748 ib_sa_comp_mask comp_mask,
1749 int timeout_ms, gfp_t gfp_mask,
1750 void (*callback)(int status,
1751 struct ib_sa_service_rec *resp,
1752 void *context),
1753 void *context,
1754 struct ib_sa_query **sa_query)
1755{
1756 struct ib_sa_service_query *query;
1757 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1758 struct ib_sa_port *port;
1759 struct ib_mad_agent *agent;
1760 struct ib_sa_mad *mad;
1761 int ret;
1762
1763 if (!sa_dev)
1764 return -ENODEV;
1765
1766 port = &sa_dev->port[port_num - sa_dev->start_port];
1767 agent = port->agent;
1768
1769 if (method != IB_MGMT_METHOD_GET &&
1770 method != IB_MGMT_METHOD_SET &&
1771 method != IB_SA_METHOD_DELETE)
1772 return -EINVAL;
1773
1774 query = kzalloc(sizeof(*query), gfp_mask);
1775 if (!query)
1776 return -ENOMEM;
1777
1778 query->sa_query.port = port;
1779 ret = alloc_mad(&query->sa_query, gfp_mask);
1780 if (ret)
1781 goto err1;
1782
1783 ib_sa_client_get(client);
1784 query->sa_query.client = client;
1785 query->callback = callback;
1786 query->context = context;
1787
1788 mad = query->sa_query.mad_buf->mad;
1789 init_mad(&query->sa_query, agent);
1790
1791 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1792 query->sa_query.release = ib_sa_service_rec_release;
1793 mad->mad_hdr.method = method;
1794 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1795 mad->sa_hdr.comp_mask = comp_mask;
1796
1797 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
1798 rec, mad->data);
1799
1800 *sa_query = &query->sa_query;
1801
1802 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1803 if (ret < 0)
1804 goto err2;
1805
1806 return ret;
1807
1808err2:
1809 *sa_query = NULL;
1810 ib_sa_client_put(query->sa_query.client);
1811 free_mad(&query->sa_query);
1812
1813err1:
1814 kfree(query);
1815 return ret;
1816}
1817EXPORT_SYMBOL(ib_sa_service_rec_query);
1818
1819static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1820 int status,
1821 struct ib_sa_mad *mad)
1822{
1823 struct ib_sa_mcmember_query *query =
1824 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1825
1826 if (mad) {
1827 struct ib_sa_mcmember_rec rec;
1828
1829 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1830 mad->data, &rec);
1831 query->callback(status, &rec, query->context);
1832 } else
1833 query->callback(status, NULL, query->context);
1834}
1835
1836static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1837{
1838 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1839}
1840
1841int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1842 struct ib_device *device, u8 port_num,
1843 u8 method,
1844 struct ib_sa_mcmember_rec *rec,
1845 ib_sa_comp_mask comp_mask,
1846 int timeout_ms, gfp_t gfp_mask,
1847 void (*callback)(int status,
1848 struct ib_sa_mcmember_rec *resp,
1849 void *context),
1850 void *context,
1851 struct ib_sa_query **sa_query)
1852{
1853 struct ib_sa_mcmember_query *query;
1854 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1855 struct ib_sa_port *port;
1856 struct ib_mad_agent *agent;
1857 struct ib_sa_mad *mad;
1858 int ret;
1859
1860 if (!sa_dev)
1861 return -ENODEV;
1862
1863 port = &sa_dev->port[port_num - sa_dev->start_port];
1864 agent = port->agent;
1865
1866 query = kzalloc(sizeof(*query), gfp_mask);
1867 if (!query)
1868 return -ENOMEM;
1869
1870 query->sa_query.port = port;
1871 ret = alloc_mad(&query->sa_query, gfp_mask);
1872 if (ret)
1873 goto err1;
1874
1875 ib_sa_client_get(client);
1876 query->sa_query.client = client;
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 = callback ? ib_sa_mcmember_rec_callback : NULL;
1884 query->sa_query.release = ib_sa_mcmember_rec_release;
1885 mad->mad_hdr.method = method;
1886 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1887 mad->sa_hdr.comp_mask = comp_mask;
1888
1889 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1890 rec, mad->data);
1891
1892 *sa_query = &query->sa_query;
1893
1894 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1895 if (ret < 0)
1896 goto err2;
1897
1898 return ret;
1899
1900err2:
1901 *sa_query = NULL;
1902 ib_sa_client_put(query->sa_query.client);
1903 free_mad(&query->sa_query);
1904
1905err1:
1906 kfree(query);
1907 return ret;
1908}
1909
1910
1911static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1912 int status,
1913 struct ib_sa_mad *mad)
1914{
1915 struct ib_sa_guidinfo_query *query =
1916 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1917
1918 if (mad) {
1919 struct ib_sa_guidinfo_rec rec;
1920
1921 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1922 mad->data, &rec);
1923 query->callback(status, &rec, query->context);
1924 } else
1925 query->callback(status, NULL, query->context);
1926}
1927
1928static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1929{
1930 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1931}
1932
1933int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1934 struct ib_device *device, u8 port_num,
1935 struct ib_sa_guidinfo_rec *rec,
1936 ib_sa_comp_mask comp_mask, u8 method,
1937 int timeout_ms, gfp_t gfp_mask,
1938 void (*callback)(int status,
1939 struct ib_sa_guidinfo_rec *resp,
1940 void *context),
1941 void *context,
1942 struct ib_sa_query **sa_query)
1943{
1944 struct ib_sa_guidinfo_query *query;
1945 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1946 struct ib_sa_port *port;
1947 struct ib_mad_agent *agent;
1948 struct ib_sa_mad *mad;
1949 int ret;
1950
1951 if (!sa_dev)
1952 return -ENODEV;
1953
1954 if (method != IB_MGMT_METHOD_GET &&
1955 method != IB_MGMT_METHOD_SET &&
1956 method != IB_SA_METHOD_DELETE) {
1957 return -EINVAL;
1958 }
1959
1960 port = &sa_dev->port[port_num - sa_dev->start_port];
1961 agent = port->agent;
1962
1963 query = kzalloc(sizeof(*query), gfp_mask);
1964 if (!query)
1965 return -ENOMEM;
1966
1967 query->sa_query.port = port;
1968 ret = alloc_mad(&query->sa_query, gfp_mask);
1969 if (ret)
1970 goto err1;
1971
1972 ib_sa_client_get(client);
1973 query->sa_query.client = client;
1974 query->callback = callback;
1975 query->context = context;
1976
1977 mad = query->sa_query.mad_buf->mad;
1978 init_mad(&query->sa_query, agent);
1979
1980 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1981 query->sa_query.release = ib_sa_guidinfo_rec_release;
1982
1983 mad->mad_hdr.method = method;
1984 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1985 mad->sa_hdr.comp_mask = comp_mask;
1986
1987 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1988 mad->data);
1989
1990 *sa_query = &query->sa_query;
1991
1992 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1993 if (ret < 0)
1994 goto err2;
1995
1996 return ret;
1997
1998err2:
1999 *sa_query = NULL;
2000 ib_sa_client_put(query->sa_query.client);
2001 free_mad(&query->sa_query);
2002
2003err1:
2004 kfree(query);
2005 return ret;
2006}
2007EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
2008
2009bool ib_sa_sendonly_fullmem_support(struct ib_sa_client *client,
2010 struct ib_device *device,
2011 u8 port_num)
2012{
2013 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
2014 struct ib_sa_port *port;
2015 bool ret = false;
2016 unsigned long flags;
2017
2018 if (!sa_dev)
2019 return ret;
2020
2021 port = &sa_dev->port[port_num - sa_dev->start_port];
2022
2023 spin_lock_irqsave(&port->classport_lock, flags);
2024 if ((port->classport_info.valid) &&
2025 (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_IB))
2026 ret = ib_get_cpi_capmask2(&port->classport_info.data.ib)
2027 & IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT;
2028 spin_unlock_irqrestore(&port->classport_lock, flags);
2029 return ret;
2030}
2031EXPORT_SYMBOL(ib_sa_sendonly_fullmem_support);
2032
2033struct ib_classport_info_context {
2034 struct completion done;
2035 struct ib_sa_query *sa_query;
2036};
2037
2038static void ib_classportinfo_cb(void *context)
2039{
2040 struct ib_classport_info_context *cb_ctx = context;
2041
2042 complete(&cb_ctx->done);
2043}
2044
2045static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
2046 int status,
2047 struct ib_sa_mad *mad)
2048{
2049 unsigned long flags;
2050 struct ib_sa_classport_info_query *query =
2051 container_of(sa_query, struct ib_sa_classport_info_query, sa_query);
2052 struct ib_sa_classport_cache *info = &sa_query->port->classport_info;
2053
2054 if (mad) {
2055 if (sa_query->flags & IB_SA_QUERY_OPA) {
2056 struct opa_class_port_info rec;
2057
2058 ib_unpack(opa_classport_info_rec_table,
2059 ARRAY_SIZE(opa_classport_info_rec_table),
2060 mad->data, &rec);
2061
2062 spin_lock_irqsave(&sa_query->port->classport_lock,
2063 flags);
2064 if (!status && !info->valid) {
2065 memcpy(&info->data.opa, &rec,
2066 sizeof(info->data.opa));
2067
2068 info->valid = true;
2069 info->data.type = RDMA_CLASS_PORT_INFO_OPA;
2070 }
2071 spin_unlock_irqrestore(&sa_query->port->classport_lock,
2072 flags);
2073
2074 } else {
2075 struct ib_class_port_info rec;
2076
2077 ib_unpack(ib_classport_info_rec_table,
2078 ARRAY_SIZE(ib_classport_info_rec_table),
2079 mad->data, &rec);
2080
2081 spin_lock_irqsave(&sa_query->port->classport_lock,
2082 flags);
2083 if (!status && !info->valid) {
2084 memcpy(&info->data.ib, &rec,
2085 sizeof(info->data.ib));
2086
2087 info->valid = true;
2088 info->data.type = RDMA_CLASS_PORT_INFO_IB;
2089 }
2090 spin_unlock_irqrestore(&sa_query->port->classport_lock,
2091 flags);
2092 }
2093 }
2094 query->callback(query->context);
2095}
2096
2097static void ib_sa_classport_info_rec_release(struct ib_sa_query *sa_query)
2098{
2099 kfree(container_of(sa_query, struct ib_sa_classport_info_query,
2100 sa_query));
2101}
2102
2103static int ib_sa_classport_info_rec_query(struct ib_sa_port *port,
2104 int timeout_ms,
2105 void (*callback)(void *context),
2106 void *context,
2107 struct ib_sa_query **sa_query)
2108{
2109 struct ib_mad_agent *agent;
2110 struct ib_sa_classport_info_query *query;
2111 struct ib_sa_mad *mad;
2112 gfp_t gfp_mask = GFP_KERNEL;
2113 int ret;
2114
2115 agent = port->agent;
2116
2117 query = kzalloc(sizeof(*query), gfp_mask);
2118 if (!query)
2119 return -ENOMEM;
2120
2121 query->sa_query.port = port;
2122 query->sa_query.flags |= rdma_cap_opa_ah(port->agent->device,
2123 port->port_num) ?
2124 IB_SA_QUERY_OPA : 0;
2125 ret = alloc_mad(&query->sa_query, gfp_mask);
2126 if (ret)
2127 goto err_free;
2128
2129 query->callback = callback;
2130 query->context = context;
2131
2132 mad = query->sa_query.mad_buf->mad;
2133 init_mad(&query->sa_query, agent);
2134
2135 query->sa_query.callback = ib_sa_classport_info_rec_callback;
2136 query->sa_query.release = ib_sa_classport_info_rec_release;
2137 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
2138 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO);
2139 mad->sa_hdr.comp_mask = 0;
2140 *sa_query = &query->sa_query;
2141
2142 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
2143 if (ret < 0)
2144 goto err_free_mad;
2145
2146 return ret;
2147
2148err_free_mad:
2149 *sa_query = NULL;
2150 free_mad(&query->sa_query);
2151
2152err_free:
2153 kfree(query);
2154 return ret;
2155}
2156
2157static void update_ib_cpi(struct work_struct *work)
2158{
2159 struct ib_sa_port *port =
2160 container_of(work, struct ib_sa_port, ib_cpi_work.work);
2161 struct ib_classport_info_context *cb_context;
2162 unsigned long flags;
2163 int ret;
2164
2165
2166
2167
2168 spin_lock_irqsave(&port->classport_lock, flags);
2169 if (port->classport_info.valid) {
2170 spin_unlock_irqrestore(&port->classport_lock, flags);
2171 return;
2172 }
2173 spin_unlock_irqrestore(&port->classport_lock, flags);
2174
2175 cb_context = kmalloc(sizeof(*cb_context), GFP_KERNEL);
2176 if (!cb_context)
2177 goto err_nomem;
2178
2179 init_completion(&cb_context->done);
2180
2181 ret = ib_sa_classport_info_rec_query(port, 3000,
2182 ib_classportinfo_cb, cb_context,
2183 &cb_context->sa_query);
2184 if (ret < 0)
2185 goto free_cb_err;
2186 wait_for_completion(&cb_context->done);
2187free_cb_err:
2188 kfree(cb_context);
2189 spin_lock_irqsave(&port->classport_lock, flags);
2190
2191
2192
2193
2194 if (!port->classport_info.valid) {
2195 port->classport_info.retry_cnt++;
2196 if (port->classport_info.retry_cnt <=
2197 IB_SA_CPI_MAX_RETRY_CNT) {
2198 unsigned long delay =
2199 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2200
2201 queue_delayed_work(ib_wq, &port->ib_cpi_work, delay);
2202 }
2203 }
2204 spin_unlock_irqrestore(&port->classport_lock, flags);
2205
2206err_nomem:
2207 return;
2208}
2209
2210static void send_handler(struct ib_mad_agent *agent,
2211 struct ib_mad_send_wc *mad_send_wc)
2212{
2213 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
2214 unsigned long flags;
2215
2216 if (query->callback)
2217 switch (mad_send_wc->status) {
2218 case IB_WC_SUCCESS:
2219
2220 break;
2221 case IB_WC_RESP_TIMEOUT_ERR:
2222 query->callback(query, -ETIMEDOUT, NULL);
2223 break;
2224 case IB_WC_WR_FLUSH_ERR:
2225 query->callback(query, -EINTR, NULL);
2226 break;
2227 default:
2228 query->callback(query, -EIO, NULL);
2229 break;
2230 }
2231
2232 spin_lock_irqsave(&idr_lock, flags);
2233 idr_remove(&query_idr, query->id);
2234 spin_unlock_irqrestore(&idr_lock, flags);
2235
2236 free_mad(query);
2237 if (query->client)
2238 ib_sa_client_put(query->client);
2239 query->release(query);
2240}
2241
2242static void recv_handler(struct ib_mad_agent *mad_agent,
2243 struct ib_mad_send_buf *send_buf,
2244 struct ib_mad_recv_wc *mad_recv_wc)
2245{
2246 struct ib_sa_query *query;
2247
2248 if (!send_buf)
2249 return;
2250
2251 query = send_buf->context[0];
2252 if (query->callback) {
2253 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
2254 query->callback(query,
2255 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
2256 -EINVAL : 0,
2257 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
2258 else
2259 query->callback(query, -EIO, NULL);
2260 }
2261
2262 ib_free_recv_mad(mad_recv_wc);
2263}
2264
2265static void update_sm_ah(struct work_struct *work)
2266{
2267 struct ib_sa_port *port =
2268 container_of(work, struct ib_sa_port, update_task);
2269 struct ib_sa_sm_ah *new_ah;
2270 struct ib_port_attr port_attr;
2271 struct rdma_ah_attr ah_attr;
2272
2273 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
2274 pr_warn("Couldn't query port\n");
2275 return;
2276 }
2277
2278 new_ah = kmalloc(sizeof(*new_ah), GFP_KERNEL);
2279 if (!new_ah)
2280 return;
2281
2282 kref_init(&new_ah->ref);
2283 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
2284
2285 new_ah->pkey_index = 0;
2286 if (ib_find_pkey(port->agent->device, port->port_num,
2287 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
2288 pr_err("Couldn't find index for default PKey\n");
2289
2290 memset(&ah_attr, 0, sizeof(ah_attr));
2291 ah_attr.type = rdma_ah_find_type(port->agent->device,
2292 port->port_num);
2293 rdma_ah_set_dlid(&ah_attr, port_attr.sm_lid);
2294 rdma_ah_set_sl(&ah_attr, port_attr.sm_sl);
2295 rdma_ah_set_port_num(&ah_attr, port->port_num);
2296 if (port_attr.grh_required) {
2297 if (ah_attr.type == RDMA_AH_ATTR_TYPE_OPA) {
2298 rdma_ah_set_make_grd(&ah_attr, true);
2299 } else {
2300 rdma_ah_set_ah_flags(&ah_attr, IB_AH_GRH);
2301 rdma_ah_set_subnet_prefix(&ah_attr,
2302 cpu_to_be64(port_attr.subnet_prefix));
2303 rdma_ah_set_interface_id(&ah_attr,
2304 cpu_to_be64(IB_SA_WELL_KNOWN_GUID));
2305 }
2306 }
2307
2308 new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr);
2309 if (IS_ERR(new_ah->ah)) {
2310 pr_warn("Couldn't create new SM AH\n");
2311 kfree(new_ah);
2312 return;
2313 }
2314
2315 spin_lock_irq(&port->ah_lock);
2316 if (port->sm_ah)
2317 kref_put(&port->sm_ah->ref, free_sm_ah);
2318 port->sm_ah = new_ah;
2319 spin_unlock_irq(&port->ah_lock);
2320}
2321
2322static void ib_sa_event(struct ib_event_handler *handler,
2323 struct ib_event *event)
2324{
2325 if (event->event == IB_EVENT_PORT_ERR ||
2326 event->event == IB_EVENT_PORT_ACTIVE ||
2327 event->event == IB_EVENT_LID_CHANGE ||
2328 event->event == IB_EVENT_PKEY_CHANGE ||
2329 event->event == IB_EVENT_SM_CHANGE ||
2330 event->event == IB_EVENT_CLIENT_REREGISTER) {
2331 unsigned long flags;
2332 struct ib_sa_device *sa_dev =
2333 container_of(handler, typeof(*sa_dev), event_handler);
2334 u8 port_num = event->element.port_num - sa_dev->start_port;
2335 struct ib_sa_port *port = &sa_dev->port[port_num];
2336
2337 if (!rdma_cap_ib_sa(handler->device, port->port_num))
2338 return;
2339
2340 spin_lock_irqsave(&port->ah_lock, flags);
2341 if (port->sm_ah)
2342 kref_put(&port->sm_ah->ref, free_sm_ah);
2343 port->sm_ah = NULL;
2344 spin_unlock_irqrestore(&port->ah_lock, flags);
2345
2346 if (event->event == IB_EVENT_SM_CHANGE ||
2347 event->event == IB_EVENT_CLIENT_REREGISTER ||
2348 event->event == IB_EVENT_LID_CHANGE ||
2349 event->event == IB_EVENT_PORT_ACTIVE) {
2350 unsigned long delay =
2351 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2352
2353 spin_lock_irqsave(&port->classport_lock, flags);
2354 port->classport_info.valid = false;
2355 port->classport_info.retry_cnt = 0;
2356 spin_unlock_irqrestore(&port->classport_lock, flags);
2357 queue_delayed_work(ib_wq,
2358 &port->ib_cpi_work, delay);
2359 }
2360 queue_work(ib_wq, &sa_dev->port[port_num].update_task);
2361 }
2362}
2363
2364static void ib_sa_add_one(struct ib_device *device)
2365{
2366 struct ib_sa_device *sa_dev;
2367 int s, e, i;
2368 int count = 0;
2369
2370 s = rdma_start_port(device);
2371 e = rdma_end_port(device);
2372
2373 sa_dev = kzalloc(sizeof *sa_dev +
2374 (e - s + 1) * sizeof (struct ib_sa_port),
2375 GFP_KERNEL);
2376 if (!sa_dev)
2377 return;
2378
2379 sa_dev->start_port = s;
2380 sa_dev->end_port = e;
2381
2382 for (i = 0; i <= e - s; ++i) {
2383 spin_lock_init(&sa_dev->port[i].ah_lock);
2384 if (!rdma_cap_ib_sa(device, i + 1))
2385 continue;
2386
2387 sa_dev->port[i].sm_ah = NULL;
2388 sa_dev->port[i].port_num = i + s;
2389
2390 spin_lock_init(&sa_dev->port[i].classport_lock);
2391 sa_dev->port[i].classport_info.valid = false;
2392
2393 sa_dev->port[i].agent =
2394 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
2395 NULL, 0, send_handler,
2396 recv_handler, sa_dev, 0);
2397 if (IS_ERR(sa_dev->port[i].agent))
2398 goto err;
2399
2400 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
2401 INIT_DELAYED_WORK(&sa_dev->port[i].ib_cpi_work,
2402 update_ib_cpi);
2403
2404 count++;
2405 }
2406
2407 if (!count)
2408 goto free;
2409
2410 ib_set_client_data(device, &sa_client, sa_dev);
2411
2412
2413
2414
2415
2416
2417
2418
2419 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
2420 ib_register_event_handler(&sa_dev->event_handler);
2421
2422 for (i = 0; i <= e - s; ++i) {
2423 if (rdma_cap_ib_sa(device, i + 1))
2424 update_sm_ah(&sa_dev->port[i].update_task);
2425 }
2426
2427 return;
2428
2429err:
2430 while (--i >= 0) {
2431 if (rdma_cap_ib_sa(device, i + 1))
2432 ib_unregister_mad_agent(sa_dev->port[i].agent);
2433 }
2434free:
2435 kfree(sa_dev);
2436 return;
2437}
2438
2439static void ib_sa_remove_one(struct ib_device *device, void *client_data)
2440{
2441 struct ib_sa_device *sa_dev = client_data;
2442 int i;
2443
2444 if (!sa_dev)
2445 return;
2446
2447 ib_unregister_event_handler(&sa_dev->event_handler);
2448 flush_workqueue(ib_wq);
2449
2450 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
2451 if (rdma_cap_ib_sa(device, i + 1)) {
2452 cancel_delayed_work_sync(&sa_dev->port[i].ib_cpi_work);
2453 ib_unregister_mad_agent(sa_dev->port[i].agent);
2454 if (sa_dev->port[i].sm_ah)
2455 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
2456 }
2457
2458 }
2459
2460 kfree(sa_dev);
2461}
2462
2463int ib_sa_init(void)
2464{
2465 int ret;
2466
2467 get_random_bytes(&tid, sizeof tid);
2468
2469 atomic_set(&ib_nl_sa_request_seq, 0);
2470
2471 ret = ib_register_client(&sa_client);
2472 if (ret) {
2473 pr_err("Couldn't register ib_sa client\n");
2474 goto err1;
2475 }
2476
2477 ret = mcast_init();
2478 if (ret) {
2479 pr_err("Couldn't initialize multicast handling\n");
2480 goto err2;
2481 }
2482
2483 ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM);
2484 if (!ib_nl_wq) {
2485 ret = -ENOMEM;
2486 goto err3;
2487 }
2488
2489 INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
2490
2491 return 0;
2492
2493err3:
2494 mcast_cleanup();
2495err2:
2496 ib_unregister_client(&sa_client);
2497err1:
2498 return ret;
2499}
2500
2501void ib_sa_cleanup(void)
2502{
2503 cancel_delayed_work(&ib_nl_timed_work);
2504 flush_workqueue(ib_nl_wq);
2505 destroy_workqueue(ib_nl_wq);
2506 mcast_cleanup();
2507 ib_unregister_client(&sa_client);
2508 idr_destroy(&query_idr);
2509}
2510
