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41#include "o2iblnd.h"
42#include <asm/div64.h>
43
44lnd_t the_o2iblnd = {
45 .lnd_type = O2IBLND,
46 .lnd_startup = kiblnd_startup,
47 .lnd_shutdown = kiblnd_shutdown,
48 .lnd_ctl = kiblnd_ctl,
49 .lnd_query = kiblnd_query,
50 .lnd_send = kiblnd_send,
51 .lnd_recv = kiblnd_recv,
52};
53
54kib_data_t kiblnd_data;
55
56__u32
57kiblnd_cksum (void *ptr, int nob)
58{
59 char *c = ptr;
60 __u32 sum = 0;
61
62 while (nob-- > 0)
63 sum = ((sum << 1) | (sum >> 31)) + *c++;
64
65
66 return (sum == 0) ? 1 : sum;
67}
68
69static char *
70kiblnd_msgtype2str(int type)
71{
72 switch (type) {
73 case IBLND_MSG_CONNREQ:
74 return "CONNREQ";
75
76 case IBLND_MSG_CONNACK:
77 return "CONNACK";
78
79 case IBLND_MSG_NOOP:
80 return "NOOP";
81
82 case IBLND_MSG_IMMEDIATE:
83 return "IMMEDIATE";
84
85 case IBLND_MSG_PUT_REQ:
86 return "PUT_REQ";
87
88 case IBLND_MSG_PUT_NAK:
89 return "PUT_NAK";
90
91 case IBLND_MSG_PUT_ACK:
92 return "PUT_ACK";
93
94 case IBLND_MSG_PUT_DONE:
95 return "PUT_DONE";
96
97 case IBLND_MSG_GET_REQ:
98 return "GET_REQ";
99
100 case IBLND_MSG_GET_DONE:
101 return "GET_DONE";
102
103 default:
104 return "???";
105 }
106}
107
108static int
109kiblnd_msgtype2size(int type)
110{
111 const int hdr_size = offsetof(kib_msg_t, ibm_u);
112
113 switch (type) {
114 case IBLND_MSG_CONNREQ:
115 case IBLND_MSG_CONNACK:
116 return hdr_size + sizeof(kib_connparams_t);
117
118 case IBLND_MSG_NOOP:
119 return hdr_size;
120
121 case IBLND_MSG_IMMEDIATE:
122 return offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[0]);
123
124 case IBLND_MSG_PUT_REQ:
125 return hdr_size + sizeof(kib_putreq_msg_t);
126
127 case IBLND_MSG_PUT_ACK:
128 return hdr_size + sizeof(kib_putack_msg_t);
129
130 case IBLND_MSG_GET_REQ:
131 return hdr_size + sizeof(kib_get_msg_t);
132
133 case IBLND_MSG_PUT_NAK:
134 case IBLND_MSG_PUT_DONE:
135 case IBLND_MSG_GET_DONE:
136 return hdr_size + sizeof(kib_completion_msg_t);
137 default:
138 return -1;
139 }
140}
141
142static int
143kiblnd_unpack_rd(kib_msg_t *msg, int flip)
144{
145 kib_rdma_desc_t *rd;
146 int nob;
147 int n;
148 int i;
149
150 LASSERT (msg->ibm_type == IBLND_MSG_GET_REQ ||
151 msg->ibm_type == IBLND_MSG_PUT_ACK);
152
153 rd = msg->ibm_type == IBLND_MSG_GET_REQ ?
154 &msg->ibm_u.get.ibgm_rd :
155 &msg->ibm_u.putack.ibpam_rd;
156
157 if (flip) {
158 __swab32s(&rd->rd_key);
159 __swab32s(&rd->rd_nfrags);
160 }
161
162 n = rd->rd_nfrags;
163
164 if (n <= 0 || n > IBLND_MAX_RDMA_FRAGS) {
165 CERROR("Bad nfrags: %d, should be 0 < n <= %d\n",
166 n, IBLND_MAX_RDMA_FRAGS);
167 return 1;
168 }
169
170 nob = offsetof (kib_msg_t, ibm_u) +
171 kiblnd_rd_msg_size(rd, msg->ibm_type, n);
172
173 if (msg->ibm_nob < nob) {
174 CERROR("Short %s: %d(%d)\n",
175 kiblnd_msgtype2str(msg->ibm_type), msg->ibm_nob, nob);
176 return 1;
177 }
178
179 if (!flip)
180 return 0;
181
182 for (i = 0; i < n; i++) {
183 __swab32s(&rd->rd_frags[i].rf_nob);
184 __swab64s(&rd->rd_frags[i].rf_addr);
185 }
186
187 return 0;
188}
189
190void
191kiblnd_pack_msg (lnet_ni_t *ni, kib_msg_t *msg, int version,
192 int credits, lnet_nid_t dstnid, __u64 dststamp)
193{
194 kib_net_t *net = ni->ni_data;
195
196
197
198 msg->ibm_magic = IBLND_MSG_MAGIC;
199 msg->ibm_version = version;
200
201 msg->ibm_credits = credits;
202
203 msg->ibm_cksum = 0;
204 msg->ibm_srcnid = ni->ni_nid;
205 msg->ibm_srcstamp = net->ibn_incarnation;
206 msg->ibm_dstnid = dstnid;
207 msg->ibm_dststamp = dststamp;
208
209 if (*kiblnd_tunables.kib_cksum) {
210
211 msg->ibm_cksum = kiblnd_cksum(msg, msg->ibm_nob);
212 }
213}
214
215int
216kiblnd_unpack_msg(kib_msg_t *msg, int nob)
217{
218 const int hdr_size = offsetof(kib_msg_t, ibm_u);
219 __u32 msg_cksum;
220 __u16 version;
221 int msg_nob;
222 int flip;
223
224
225 if (nob < 6) {
226 CERROR("Short message: %d\n", nob);
227 return -EPROTO;
228 }
229
230 if (msg->ibm_magic == IBLND_MSG_MAGIC) {
231 flip = 0;
232 } else if (msg->ibm_magic == __swab32(IBLND_MSG_MAGIC)) {
233 flip = 1;
234 } else {
235 CERROR("Bad magic: %08x\n", msg->ibm_magic);
236 return -EPROTO;
237 }
238
239 version = flip ? __swab16(msg->ibm_version) : msg->ibm_version;
240 if (version != IBLND_MSG_VERSION &&
241 version != IBLND_MSG_VERSION_1) {
242 CERROR("Bad version: %x\n", version);
243 return -EPROTO;
244 }
245
246 if (nob < hdr_size) {
247 CERROR("Short message: %d\n", nob);
248 return -EPROTO;
249 }
250
251 msg_nob = flip ? __swab32(msg->ibm_nob) : msg->ibm_nob;
252 if (msg_nob > nob) {
253 CERROR("Short message: got %d, wanted %d\n", nob, msg_nob);
254 return -EPROTO;
255 }
256
257
258
259 msg_cksum = flip ? __swab32(msg->ibm_cksum) : msg->ibm_cksum;
260 msg->ibm_cksum = 0;
261 if (msg_cksum != 0 &&
262 msg_cksum != kiblnd_cksum(msg, msg_nob)) {
263 CERROR("Bad checksum\n");
264 return -EPROTO;
265 }
266
267 msg->ibm_cksum = msg_cksum;
268
269 if (flip) {
270
271 msg->ibm_version = version;
272 CLASSERT (sizeof(msg->ibm_type) == 1);
273 CLASSERT (sizeof(msg->ibm_credits) == 1);
274 msg->ibm_nob = msg_nob;
275 __swab64s(&msg->ibm_srcnid);
276 __swab64s(&msg->ibm_srcstamp);
277 __swab64s(&msg->ibm_dstnid);
278 __swab64s(&msg->ibm_dststamp);
279 }
280
281 if (msg->ibm_srcnid == LNET_NID_ANY) {
282 CERROR("Bad src nid: %s\n", libcfs_nid2str(msg->ibm_srcnid));
283 return -EPROTO;
284 }
285
286 if (msg_nob < kiblnd_msgtype2size(msg->ibm_type)) {
287 CERROR("Short %s: %d(%d)\n", kiblnd_msgtype2str(msg->ibm_type),
288 msg_nob, kiblnd_msgtype2size(msg->ibm_type));
289 return -EPROTO;
290 }
291
292 switch (msg->ibm_type) {
293 default:
294 CERROR("Unknown message type %x\n", msg->ibm_type);
295 return -EPROTO;
296
297 case IBLND_MSG_NOOP:
298 case IBLND_MSG_IMMEDIATE:
299 case IBLND_MSG_PUT_REQ:
300 break;
301
302 case IBLND_MSG_PUT_ACK:
303 case IBLND_MSG_GET_REQ:
304 if (kiblnd_unpack_rd(msg, flip))
305 return -EPROTO;
306 break;
307
308 case IBLND_MSG_PUT_NAK:
309 case IBLND_MSG_PUT_DONE:
310 case IBLND_MSG_GET_DONE:
311 if (flip)
312 __swab32s(&msg->ibm_u.completion.ibcm_status);
313 break;
314
315 case IBLND_MSG_CONNREQ:
316 case IBLND_MSG_CONNACK:
317 if (flip) {
318 __swab16s(&msg->ibm_u.connparams.ibcp_queue_depth);
319 __swab16s(&msg->ibm_u.connparams.ibcp_max_frags);
320 __swab32s(&msg->ibm_u.connparams.ibcp_max_msg_size);
321 }
322 break;
323 }
324 return 0;
325}
326
327int
328kiblnd_create_peer(lnet_ni_t *ni, kib_peer_t **peerp, lnet_nid_t nid)
329{
330 kib_peer_t *peer;
331 kib_net_t *net = ni->ni_data;
332 int cpt = lnet_cpt_of_nid(nid);
333 unsigned long flags;
334
335 LASSERT(net != NULL);
336 LASSERT(nid != LNET_NID_ANY);
337
338 LIBCFS_CPT_ALLOC(peer, lnet_cpt_table(), cpt, sizeof(*peer));
339 if (peer == NULL) {
340 CERROR("Cannot allocate peer\n");
341 return -ENOMEM;
342 }
343
344 memset(peer, 0, sizeof(*peer));
345
346 peer->ibp_ni = ni;
347 peer->ibp_nid = nid;
348 peer->ibp_error = 0;
349 peer->ibp_last_alive = 0;
350 atomic_set(&peer->ibp_refcount, 1);
351
352 INIT_LIST_HEAD(&peer->ibp_list);
353 INIT_LIST_HEAD(&peer->ibp_conns);
354 INIT_LIST_HEAD(&peer->ibp_tx_queue);
355
356 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
357
358
359 LASSERT (net->ibn_shutdown == 0);
360
361
362 atomic_inc(&net->ibn_npeers);
363
364 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
365
366 *peerp = peer;
367 return 0;
368}
369
370void
371kiblnd_destroy_peer (kib_peer_t *peer)
372{
373 kib_net_t *net = peer->ibp_ni->ni_data;
374
375 LASSERT (net != NULL);
376 LASSERT (atomic_read(&peer->ibp_refcount) == 0);
377 LASSERT (!kiblnd_peer_active(peer));
378 LASSERT (peer->ibp_connecting == 0);
379 LASSERT (peer->ibp_accepting == 0);
380 LASSERT (list_empty(&peer->ibp_conns));
381 LASSERT (list_empty(&peer->ibp_tx_queue));
382
383 LIBCFS_FREE(peer, sizeof(*peer));
384
385
386
387
388
389 atomic_dec(&net->ibn_npeers);
390}
391
392kib_peer_t *
393kiblnd_find_peer_locked (lnet_nid_t nid)
394{
395
396
397 struct list_head *peer_list = kiblnd_nid2peerlist(nid);
398 struct list_head *tmp;
399 kib_peer_t *peer;
400
401 list_for_each (tmp, peer_list) {
402
403 peer = list_entry(tmp, kib_peer_t, ibp_list);
404
405 LASSERT (peer->ibp_connecting > 0 ||
406 peer->ibp_accepting > 0 ||
407 !list_empty(&peer->ibp_conns));
408
409 if (peer->ibp_nid != nid)
410 continue;
411
412 CDEBUG(D_NET, "got peer [%p] -> %s (%d) version: %x\n",
413 peer, libcfs_nid2str(nid),
414 atomic_read(&peer->ibp_refcount),
415 peer->ibp_version);
416 return peer;
417 }
418 return NULL;
419}
420
421void
422kiblnd_unlink_peer_locked (kib_peer_t *peer)
423{
424 LASSERT (list_empty(&peer->ibp_conns));
425
426 LASSERT (kiblnd_peer_active(peer));
427 list_del_init(&peer->ibp_list);
428
429 kiblnd_peer_decref(peer);
430}
431
432int
433kiblnd_get_peer_info (lnet_ni_t *ni, int index,
434 lnet_nid_t *nidp, int *count)
435{
436 kib_peer_t *peer;
437 struct list_head *ptmp;
438 int i;
439 unsigned long flags;
440
441 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
442
443 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
444
445 list_for_each (ptmp, &kiblnd_data.kib_peers[i]) {
446
447 peer = list_entry(ptmp, kib_peer_t, ibp_list);
448 LASSERT (peer->ibp_connecting > 0 ||
449 peer->ibp_accepting > 0 ||
450 !list_empty(&peer->ibp_conns));
451
452 if (peer->ibp_ni != ni)
453 continue;
454
455 if (index-- > 0)
456 continue;
457
458 *nidp = peer->ibp_nid;
459 *count = atomic_read(&peer->ibp_refcount);
460
461 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
462 flags);
463 return 0;
464 }
465 }
466
467 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
468 return -ENOENT;
469}
470
471void
472kiblnd_del_peer_locked (kib_peer_t *peer)
473{
474 struct list_head *ctmp;
475 struct list_head *cnxt;
476 kib_conn_t *conn;
477
478 if (list_empty(&peer->ibp_conns)) {
479 kiblnd_unlink_peer_locked(peer);
480 } else {
481 list_for_each_safe (ctmp, cnxt, &peer->ibp_conns) {
482 conn = list_entry(ctmp, kib_conn_t, ibc_list);
483
484 kiblnd_close_conn_locked(conn, 0);
485 }
486
487 }
488
489
490}
491
492int
493kiblnd_del_peer (lnet_ni_t *ni, lnet_nid_t nid)
494{
495 LIST_HEAD (zombies);
496 struct list_head *ptmp;
497 struct list_head *pnxt;
498 kib_peer_t *peer;
499 int lo;
500 int hi;
501 int i;
502 unsigned long flags;
503 int rc = -ENOENT;
504
505 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
506
507 if (nid != LNET_NID_ANY) {
508 lo = hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
509 } else {
510 lo = 0;
511 hi = kiblnd_data.kib_peer_hash_size - 1;
512 }
513
514 for (i = lo; i <= hi; i++) {
515 list_for_each_safe (ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
516 peer = list_entry(ptmp, kib_peer_t, ibp_list);
517 LASSERT (peer->ibp_connecting > 0 ||
518 peer->ibp_accepting > 0 ||
519 !list_empty(&peer->ibp_conns));
520
521 if (peer->ibp_ni != ni)
522 continue;
523
524 if (!(nid == LNET_NID_ANY || peer->ibp_nid == nid))
525 continue;
526
527 if (!list_empty(&peer->ibp_tx_queue)) {
528 LASSERT (list_empty(&peer->ibp_conns));
529
530 list_splice_init(&peer->ibp_tx_queue,
531 &zombies);
532 }
533
534 kiblnd_del_peer_locked(peer);
535 rc = 0;
536 }
537 }
538
539 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
540
541 kiblnd_txlist_done(ni, &zombies, -EIO);
542
543 return rc;
544}
545
546kib_conn_t *
547kiblnd_get_conn_by_idx (lnet_ni_t *ni, int index)
548{
549 kib_peer_t *peer;
550 struct list_head *ptmp;
551 kib_conn_t *conn;
552 struct list_head *ctmp;
553 int i;
554 unsigned long flags;
555
556 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
557
558 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
559 list_for_each (ptmp, &kiblnd_data.kib_peers[i]) {
560
561 peer = list_entry(ptmp, kib_peer_t, ibp_list);
562 LASSERT (peer->ibp_connecting > 0 ||
563 peer->ibp_accepting > 0 ||
564 !list_empty(&peer->ibp_conns));
565
566 if (peer->ibp_ni != ni)
567 continue;
568
569 list_for_each (ctmp, &peer->ibp_conns) {
570 if (index-- > 0)
571 continue;
572
573 conn = list_entry(ctmp, kib_conn_t,
574 ibc_list);
575 kiblnd_conn_addref(conn);
576 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
577 flags);
578 return conn;
579 }
580 }
581 }
582
583 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
584 return NULL;
585}
586
587void
588kiblnd_debug_rx (kib_rx_t *rx)
589{
590 CDEBUG(D_CONSOLE, " %p status %d msg_type %x cred %d\n",
591 rx, rx->rx_status, rx->rx_msg->ibm_type,
592 rx->rx_msg->ibm_credits);
593}
594
595void
596kiblnd_debug_tx (kib_tx_t *tx)
597{
598 CDEBUG(D_CONSOLE, " %p snd %d q %d w %d rc %d dl %lx "
599 "cookie "LPX64" msg %s%s type %x cred %d\n",
600 tx, tx->tx_sending, tx->tx_queued, tx->tx_waiting,
601 tx->tx_status, tx->tx_deadline, tx->tx_cookie,
602 tx->tx_lntmsg[0] == NULL ? "-" : "!",
603 tx->tx_lntmsg[1] == NULL ? "-" : "!",
604 tx->tx_msg->ibm_type, tx->tx_msg->ibm_credits);
605}
606
607void
608kiblnd_debug_conn (kib_conn_t *conn)
609{
610 struct list_head *tmp;
611 int i;
612
613 spin_lock(&conn->ibc_lock);
614
615 CDEBUG(D_CONSOLE, "conn[%d] %p [version %x] -> %s: \n",
616 atomic_read(&conn->ibc_refcount), conn,
617 conn->ibc_version, libcfs_nid2str(conn->ibc_peer->ibp_nid));
618 CDEBUG(D_CONSOLE, " state %d nposted %d/%d cred %d o_cred %d r_cred %d\n",
619 conn->ibc_state, conn->ibc_noops_posted,
620 conn->ibc_nsends_posted, conn->ibc_credits,
621 conn->ibc_outstanding_credits, conn->ibc_reserved_credits);
622 CDEBUG(D_CONSOLE, " comms_err %d\n", conn->ibc_comms_error);
623
624 CDEBUG(D_CONSOLE, " early_rxs:\n");
625 list_for_each(tmp, &conn->ibc_early_rxs)
626 kiblnd_debug_rx(list_entry(tmp, kib_rx_t, rx_list));
627
628 CDEBUG(D_CONSOLE, " tx_noops:\n");
629 list_for_each(tmp, &conn->ibc_tx_noops)
630 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
631
632 CDEBUG(D_CONSOLE, " tx_queue_nocred:\n");
633 list_for_each(tmp, &conn->ibc_tx_queue_nocred)
634 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
635
636 CDEBUG(D_CONSOLE, " tx_queue_rsrvd:\n");
637 list_for_each(tmp, &conn->ibc_tx_queue_rsrvd)
638 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
639
640 CDEBUG(D_CONSOLE, " tx_queue:\n");
641 list_for_each(tmp, &conn->ibc_tx_queue)
642 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
643
644 CDEBUG(D_CONSOLE, " active_txs:\n");
645 list_for_each(tmp, &conn->ibc_active_txs)
646 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
647
648 CDEBUG(D_CONSOLE, " rxs:\n");
649 for (i = 0; i < IBLND_RX_MSGS(conn->ibc_version); i++)
650 kiblnd_debug_rx(&conn->ibc_rxs[i]);
651
652 spin_unlock(&conn->ibc_lock);
653}
654
655int
656kiblnd_translate_mtu(int value)
657{
658 switch (value) {
659 default:
660 return -1;
661 case 0:
662 return 0;
663 case 256:
664 return IB_MTU_256;
665 case 512:
666 return IB_MTU_512;
667 case 1024:
668 return IB_MTU_1024;
669 case 2048:
670 return IB_MTU_2048;
671 case 4096:
672 return IB_MTU_4096;
673 }
674}
675
676static void
677kiblnd_setup_mtu_locked(struct rdma_cm_id *cmid)
678{
679 int mtu;
680
681
682 if (cmid->route.path_rec == NULL)
683 return;
684
685 mtu = kiblnd_translate_mtu(*kiblnd_tunables.kib_ib_mtu);
686 LASSERT (mtu >= 0);
687 if (mtu != 0)
688 cmid->route.path_rec->mtu = mtu;
689}
690
691static int
692kiblnd_get_completion_vector(kib_conn_t *conn, int cpt)
693{
694 cpumask_t *mask;
695 int vectors;
696 int off;
697 int i;
698 lnet_nid_t nid = conn->ibc_peer->ibp_nid;
699
700 vectors = conn->ibc_cmid->device->num_comp_vectors;
701 if (vectors <= 1)
702 return 0;
703
704 mask = cfs_cpt_cpumask(lnet_cpt_table(), cpt);
705
706
707 off = do_div(nid, cpus_weight(*mask));
708 for_each_cpu_mask(i, *mask) {
709 if (off-- == 0)
710 return i % vectors;
711 }
712
713 LBUG();
714 return 1;
715}
716
717kib_conn_t *
718kiblnd_create_conn(kib_peer_t *peer, struct rdma_cm_id *cmid,
719 int state, int version)
720{
721
722
723
724
725
726
727
728 rwlock_t *glock = &kiblnd_data.kib_global_lock;
729 kib_net_t *net = peer->ibp_ni->ni_data;
730 kib_dev_t *dev;
731 struct ib_qp_init_attr *init_qp_attr;
732 struct kib_sched_info *sched;
733 kib_conn_t *conn;
734 struct ib_cq *cq;
735 unsigned long flags;
736 int cpt;
737 int rc;
738 int i;
739
740 LASSERT(net != NULL);
741 LASSERT(!in_interrupt());
742
743 dev = net->ibn_dev;
744
745 cpt = lnet_cpt_of_nid(peer->ibp_nid);
746 sched = kiblnd_data.kib_scheds[cpt];
747
748 LASSERT(sched->ibs_nthreads > 0);
749
750 LIBCFS_CPT_ALLOC(init_qp_attr, lnet_cpt_table(), cpt,
751 sizeof(*init_qp_attr));
752 if (init_qp_attr == NULL) {
753 CERROR("Can't allocate qp_attr for %s\n",
754 libcfs_nid2str(peer->ibp_nid));
755 goto failed_0;
756 }
757
758 LIBCFS_CPT_ALLOC(conn, lnet_cpt_table(), cpt, sizeof(*conn));
759 if (conn == NULL) {
760 CERROR("Can't allocate connection for %s\n",
761 libcfs_nid2str(peer->ibp_nid));
762 goto failed_1;
763 }
764
765 conn->ibc_state = IBLND_CONN_INIT;
766 conn->ibc_version = version;
767 conn->ibc_peer = peer;
768 cmid->context = conn;
769 conn->ibc_cmid = cmid;
770
771 INIT_LIST_HEAD(&conn->ibc_early_rxs);
772 INIT_LIST_HEAD(&conn->ibc_tx_noops);
773 INIT_LIST_HEAD(&conn->ibc_tx_queue);
774 INIT_LIST_HEAD(&conn->ibc_tx_queue_rsrvd);
775 INIT_LIST_HEAD(&conn->ibc_tx_queue_nocred);
776 INIT_LIST_HEAD(&conn->ibc_active_txs);
777 spin_lock_init(&conn->ibc_lock);
778
779 LIBCFS_CPT_ALLOC(conn->ibc_connvars, lnet_cpt_table(), cpt,
780 sizeof(*conn->ibc_connvars));
781 if (conn->ibc_connvars == NULL) {
782 CERROR("Can't allocate in-progress connection state\n");
783 goto failed_2;
784 }
785
786 write_lock_irqsave(glock, flags);
787 if (dev->ibd_failover) {
788 write_unlock_irqrestore(glock, flags);
789 CERROR("%s: failover in progress\n", dev->ibd_ifname);
790 goto failed_2;
791 }
792
793 if (dev->ibd_hdev->ibh_ibdev != cmid->device) {
794
795 if (kiblnd_dev_can_failover(dev)) {
796 list_add_tail(&dev->ibd_fail_list,
797 &kiblnd_data.kib_failed_devs);
798 wake_up(&kiblnd_data.kib_failover_waitq);
799 }
800
801 write_unlock_irqrestore(glock, flags);
802 CERROR("cmid HCA(%s), kib_dev(%s) need failover\n",
803 cmid->device->name, dev->ibd_ifname);
804 goto failed_2;
805 }
806
807 kiblnd_hdev_addref_locked(dev->ibd_hdev);
808 conn->ibc_hdev = dev->ibd_hdev;
809
810 kiblnd_setup_mtu_locked(cmid);
811
812 write_unlock_irqrestore(glock, flags);
813
814 LIBCFS_CPT_ALLOC(conn->ibc_rxs, lnet_cpt_table(), cpt,
815 IBLND_RX_MSGS(version) * sizeof(kib_rx_t));
816 if (conn->ibc_rxs == NULL) {
817 CERROR("Cannot allocate RX buffers\n");
818 goto failed_2;
819 }
820
821 rc = kiblnd_alloc_pages(&conn->ibc_rx_pages, cpt,
822 IBLND_RX_MSG_PAGES(version));
823 if (rc != 0)
824 goto failed_2;
825
826 kiblnd_map_rx_descs(conn);
827
828 cq = ib_create_cq(cmid->device,
829 kiblnd_cq_completion, kiblnd_cq_event, conn,
830 IBLND_CQ_ENTRIES(version),
831 kiblnd_get_completion_vector(conn, cpt));
832 if (IS_ERR(cq)) {
833 CERROR("Can't create CQ: %ld, cqe: %d\n",
834 PTR_ERR(cq), IBLND_CQ_ENTRIES(version));
835 goto failed_2;
836 }
837
838 conn->ibc_cq = cq;
839
840 rc = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
841 if (rc != 0) {
842 CERROR("Can't request completion notificiation: %d\n", rc);
843 goto failed_2;
844 }
845
846 init_qp_attr->event_handler = kiblnd_qp_event;
847 init_qp_attr->qp_context = conn;
848 init_qp_attr->cap.max_send_wr = IBLND_SEND_WRS(version);
849 init_qp_attr->cap.max_recv_wr = IBLND_RECV_WRS(version);
850 init_qp_attr->cap.max_send_sge = 1;
851 init_qp_attr->cap.max_recv_sge = 1;
852 init_qp_attr->sq_sig_type = IB_SIGNAL_REQ_WR;
853 init_qp_attr->qp_type = IB_QPT_RC;
854 init_qp_attr->send_cq = cq;
855 init_qp_attr->recv_cq = cq;
856
857 conn->ibc_sched = sched;
858
859 rc = rdma_create_qp(cmid, conn->ibc_hdev->ibh_pd, init_qp_attr);
860 if (rc != 0) {
861 CERROR("Can't create QP: %d, send_wr: %d, recv_wr: %d\n",
862 rc, init_qp_attr->cap.max_send_wr,
863 init_qp_attr->cap.max_recv_wr);
864 goto failed_2;
865 }
866
867 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
868
869
870 atomic_set(&conn->ibc_refcount, 1 + IBLND_RX_MSGS(version));
871 conn->ibc_nrx = IBLND_RX_MSGS(version);
872
873
874 for (i = 0; i < IBLND_RX_MSGS(version); i++) {
875 rc = kiblnd_post_rx(&conn->ibc_rxs[i],
876 IBLND_POSTRX_NO_CREDIT);
877 if (rc != 0) {
878 CERROR("Can't post rxmsg: %d\n", rc);
879
880
881 kiblnd_abort_receives(conn);
882
883
884
885 spin_lock_irqsave(&sched->ibs_lock, flags);
886 conn->ibc_nrx -= IBLND_RX_MSGS(version) - i;
887 spin_unlock_irqrestore(&sched->ibs_lock, flags);
888
889
890
891
892 rdma_destroy_qp(conn->ibc_cmid);
893 conn->ibc_cmid = NULL;
894
895
896 while (i++ <= IBLND_RX_MSGS(version))
897 kiblnd_conn_decref(conn);
898
899 return NULL;
900 }
901 }
902
903
904 LASSERT (state == IBLND_CONN_ACTIVE_CONNECT ||
905 state == IBLND_CONN_PASSIVE_WAIT);
906 conn->ibc_state = state;
907
908
909 atomic_inc(&net->ibn_nconns);
910 return conn;
911
912 failed_2:
913 kiblnd_destroy_conn(conn);
914 failed_1:
915 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
916 failed_0:
917 return NULL;
918}
919
920void
921kiblnd_destroy_conn (kib_conn_t *conn)
922{
923 struct rdma_cm_id *cmid = conn->ibc_cmid;
924 kib_peer_t *peer = conn->ibc_peer;
925 int rc;
926
927 LASSERT (!in_interrupt());
928 LASSERT (atomic_read(&conn->ibc_refcount) == 0);
929 LASSERT (list_empty(&conn->ibc_early_rxs));
930 LASSERT (list_empty(&conn->ibc_tx_noops));
931 LASSERT (list_empty(&conn->ibc_tx_queue));
932 LASSERT (list_empty(&conn->ibc_tx_queue_rsrvd));
933 LASSERT (list_empty(&conn->ibc_tx_queue_nocred));
934 LASSERT (list_empty(&conn->ibc_active_txs));
935 LASSERT (conn->ibc_noops_posted == 0);
936 LASSERT (conn->ibc_nsends_posted == 0);
937
938 switch (conn->ibc_state) {
939 default:
940
941 LBUG();
942
943 case IBLND_CONN_DISCONNECTED:
944
945 LASSERT (conn->ibc_connvars == NULL);
946 break;
947
948 case IBLND_CONN_INIT:
949 break;
950 }
951
952
953 if (cmid != NULL && cmid->qp != NULL)
954 rdma_destroy_qp(cmid);
955
956 if (conn->ibc_cq != NULL) {
957 rc = ib_destroy_cq(conn->ibc_cq);
958 if (rc != 0)
959 CWARN("Error destroying CQ: %d\n", rc);
960 }
961
962 if (conn->ibc_rx_pages != NULL)
963 kiblnd_unmap_rx_descs(conn);
964
965 if (conn->ibc_rxs != NULL) {
966 LIBCFS_FREE(conn->ibc_rxs,
967 IBLND_RX_MSGS(conn->ibc_version) * sizeof(kib_rx_t));
968 }
969
970 if (conn->ibc_connvars != NULL)
971 LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
972
973 if (conn->ibc_hdev != NULL)
974 kiblnd_hdev_decref(conn->ibc_hdev);
975
976
977 if (conn->ibc_state != IBLND_CONN_INIT) {
978 kib_net_t *net = peer->ibp_ni->ni_data;
979
980 kiblnd_peer_decref(peer);
981 rdma_destroy_id(cmid);
982 atomic_dec(&net->ibn_nconns);
983 }
984
985 LIBCFS_FREE(conn, sizeof(*conn));
986}
987
988int
989kiblnd_close_peer_conns_locked (kib_peer_t *peer, int why)
990{
991 kib_conn_t *conn;
992 struct list_head *ctmp;
993 struct list_head *cnxt;
994 int count = 0;
995
996 list_for_each_safe (ctmp, cnxt, &peer->ibp_conns) {
997 conn = list_entry(ctmp, kib_conn_t, ibc_list);
998
999 CDEBUG(D_NET, "Closing conn -> %s, "
1000 "version: %x, reason: %d\n",
1001 libcfs_nid2str(peer->ibp_nid),
1002 conn->ibc_version, why);
1003
1004 kiblnd_close_conn_locked(conn, why);
1005 count++;
1006 }
1007
1008 return count;
1009}
1010
1011int
1012kiblnd_close_stale_conns_locked (kib_peer_t *peer,
1013 int version, __u64 incarnation)
1014{
1015 kib_conn_t *conn;
1016 struct list_head *ctmp;
1017 struct list_head *cnxt;
1018 int count = 0;
1019
1020 list_for_each_safe (ctmp, cnxt, &peer->ibp_conns) {
1021 conn = list_entry(ctmp, kib_conn_t, ibc_list);
1022
1023 if (conn->ibc_version == version &&
1024 conn->ibc_incarnation == incarnation)
1025 continue;
1026
1027 CDEBUG(D_NET, "Closing stale conn -> %s version: %x, "
1028 "incarnation:"LPX64"(%x, "LPX64")\n",
1029 libcfs_nid2str(peer->ibp_nid),
1030 conn->ibc_version, conn->ibc_incarnation,
1031 version, incarnation);
1032
1033 kiblnd_close_conn_locked(conn, -ESTALE);
1034 count++;
1035 }
1036
1037 return count;
1038}
1039
1040int
1041kiblnd_close_matching_conns (lnet_ni_t *ni, lnet_nid_t nid)
1042{
1043 kib_peer_t *peer;
1044 struct list_head *ptmp;
1045 struct list_head *pnxt;
1046 int lo;
1047 int hi;
1048 int i;
1049 unsigned long flags;
1050 int count = 0;
1051
1052 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1053
1054 if (nid != LNET_NID_ANY)
1055 lo = hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
1056 else {
1057 lo = 0;
1058 hi = kiblnd_data.kib_peer_hash_size - 1;
1059 }
1060
1061 for (i = lo; i <= hi; i++) {
1062 list_for_each_safe (ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
1063
1064 peer = list_entry(ptmp, kib_peer_t, ibp_list);
1065 LASSERT (peer->ibp_connecting > 0 ||
1066 peer->ibp_accepting > 0 ||
1067 !list_empty(&peer->ibp_conns));
1068
1069 if (peer->ibp_ni != ni)
1070 continue;
1071
1072 if (!(nid == LNET_NID_ANY || nid == peer->ibp_nid))
1073 continue;
1074
1075 count += kiblnd_close_peer_conns_locked(peer, 0);
1076 }
1077 }
1078
1079 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1080
1081
1082 if (nid == LNET_NID_ANY)
1083 return 0;
1084
1085 return (count == 0) ? -ENOENT : 0;
1086}
1087
1088int
1089kiblnd_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg)
1090{
1091 struct libcfs_ioctl_data *data = arg;
1092 int rc = -EINVAL;
1093
1094 switch(cmd) {
1095 case IOC_LIBCFS_GET_PEER: {
1096 lnet_nid_t nid = 0;
1097 int count = 0;
1098
1099 rc = kiblnd_get_peer_info(ni, data->ioc_count,
1100 &nid, &count);
1101 data->ioc_nid = nid;
1102 data->ioc_count = count;
1103 break;
1104 }
1105
1106 case IOC_LIBCFS_DEL_PEER: {
1107 rc = kiblnd_del_peer(ni, data->ioc_nid);
1108 break;
1109 }
1110 case IOC_LIBCFS_GET_CONN: {
1111 kib_conn_t *conn;
1112
1113 rc = 0;
1114 conn = kiblnd_get_conn_by_idx(ni, data->ioc_count);
1115 if (conn == NULL) {
1116 rc = -ENOENT;
1117 break;
1118 }
1119
1120 LASSERT (conn->ibc_cmid != NULL);
1121 data->ioc_nid = conn->ibc_peer->ibp_nid;
1122 if (conn->ibc_cmid->route.path_rec == NULL)
1123 data->ioc_u32[0] = 0;
1124 else
1125 data->ioc_u32[0] =
1126 ib_mtu_enum_to_int(conn->ibc_cmid->route.path_rec->mtu);
1127 kiblnd_conn_decref(conn);
1128 break;
1129 }
1130 case IOC_LIBCFS_CLOSE_CONNECTION: {
1131 rc = kiblnd_close_matching_conns(ni, data->ioc_nid);
1132 break;
1133 }
1134
1135 default:
1136 break;
1137 }
1138
1139 return rc;
1140}
1141
1142void
1143kiblnd_query (lnet_ni_t *ni, lnet_nid_t nid, cfs_time_t *when)
1144{
1145 cfs_time_t last_alive = 0;
1146 cfs_time_t now = cfs_time_current();
1147 rwlock_t *glock = &kiblnd_data.kib_global_lock;
1148 kib_peer_t *peer;
1149 unsigned long flags;
1150
1151 read_lock_irqsave(glock, flags);
1152
1153 peer = kiblnd_find_peer_locked(nid);
1154 if (peer != NULL) {
1155 LASSERT (peer->ibp_connecting > 0 ||
1156 peer->ibp_accepting > 0 ||
1157 !list_empty(&peer->ibp_conns));
1158 last_alive = peer->ibp_last_alive;
1159 }
1160
1161 read_unlock_irqrestore(glock, flags);
1162
1163 if (last_alive != 0)
1164 *when = last_alive;
1165
1166
1167
1168 if (peer == NULL)
1169 kiblnd_launch_tx(ni, NULL, nid);
1170
1171 CDEBUG(D_NET, "Peer %s %p, alive %ld secs ago\n",
1172 libcfs_nid2str(nid), peer,
1173 last_alive ? cfs_duration_sec(now - last_alive) : -1);
1174 return;
1175}
1176
1177void
1178kiblnd_free_pages(kib_pages_t *p)
1179{
1180 int npages = p->ibp_npages;
1181 int i;
1182
1183 for (i = 0; i < npages; i++) {
1184 if (p->ibp_pages[i] != NULL)
1185 __free_page(p->ibp_pages[i]);
1186 }
1187
1188 LIBCFS_FREE(p, offsetof(kib_pages_t, ibp_pages[npages]));
1189}
1190
1191int
1192kiblnd_alloc_pages(kib_pages_t **pp, int cpt, int npages)
1193{
1194 kib_pages_t *p;
1195 int i;
1196
1197 LIBCFS_CPT_ALLOC(p, lnet_cpt_table(), cpt,
1198 offsetof(kib_pages_t, ibp_pages[npages]));
1199 if (p == NULL) {
1200 CERROR("Can't allocate descriptor for %d pages\n", npages);
1201 return -ENOMEM;
1202 }
1203
1204 memset(p, 0, offsetof(kib_pages_t, ibp_pages[npages]));
1205 p->ibp_npages = npages;
1206
1207 for (i = 0; i < npages; i++) {
1208 p->ibp_pages[i] = alloc_pages_node(
1209 cfs_cpt_spread_node(lnet_cpt_table(), cpt),
1210 __GFP_IO, 0);
1211 if (p->ibp_pages[i] == NULL) {
1212 CERROR("Can't allocate page %d of %d\n", i, npages);
1213 kiblnd_free_pages(p);
1214 return -ENOMEM;
1215 }
1216 }
1217
1218 *pp = p;
1219 return 0;
1220}
1221
1222void
1223kiblnd_unmap_rx_descs(kib_conn_t *conn)
1224{
1225 kib_rx_t *rx;
1226 int i;
1227
1228 LASSERT (conn->ibc_rxs != NULL);
1229 LASSERT (conn->ibc_hdev != NULL);
1230
1231 for (i = 0; i < IBLND_RX_MSGS(conn->ibc_version); i++) {
1232 rx = &conn->ibc_rxs[i];
1233
1234 LASSERT (rx->rx_nob >= 0);
1235
1236 kiblnd_dma_unmap_single(conn->ibc_hdev->ibh_ibdev,
1237 KIBLND_UNMAP_ADDR(rx, rx_msgunmap,
1238 rx->rx_msgaddr),
1239 IBLND_MSG_SIZE, DMA_FROM_DEVICE);
1240 }
1241
1242 kiblnd_free_pages(conn->ibc_rx_pages);
1243
1244 conn->ibc_rx_pages = NULL;
1245}
1246
1247void
1248kiblnd_map_rx_descs(kib_conn_t *conn)
1249{
1250 kib_rx_t *rx;
1251 struct page *pg;
1252 int pg_off;
1253 int ipg;
1254 int i;
1255
1256 for (pg_off = ipg = i = 0;
1257 i < IBLND_RX_MSGS(conn->ibc_version); i++) {
1258 pg = conn->ibc_rx_pages->ibp_pages[ipg];
1259 rx = &conn->ibc_rxs[i];
1260
1261 rx->rx_conn = conn;
1262 rx->rx_msg = (kib_msg_t *)(((char *)page_address(pg)) + pg_off);
1263
1264 rx->rx_msgaddr = kiblnd_dma_map_single(conn->ibc_hdev->ibh_ibdev,
1265 rx->rx_msg, IBLND_MSG_SIZE,
1266 DMA_FROM_DEVICE);
1267 LASSERT (!kiblnd_dma_mapping_error(conn->ibc_hdev->ibh_ibdev,
1268 rx->rx_msgaddr));
1269 KIBLND_UNMAP_ADDR_SET(rx, rx_msgunmap, rx->rx_msgaddr);
1270
1271 CDEBUG(D_NET,"rx %d: %p "LPX64"("LPX64")\n",
1272 i, rx->rx_msg, rx->rx_msgaddr,
1273 lnet_page2phys(pg) + pg_off);
1274
1275 pg_off += IBLND_MSG_SIZE;
1276 LASSERT (pg_off <= PAGE_SIZE);
1277
1278 if (pg_off == PAGE_SIZE) {
1279 pg_off = 0;
1280 ipg++;
1281 LASSERT (ipg <= IBLND_RX_MSG_PAGES(conn->ibc_version));
1282 }
1283 }
1284}
1285
1286static void
1287kiblnd_unmap_tx_pool(kib_tx_pool_t *tpo)
1288{
1289 kib_hca_dev_t *hdev = tpo->tpo_hdev;
1290 kib_tx_t *tx;
1291 int i;
1292
1293 LASSERT (tpo->tpo_pool.po_allocated == 0);
1294
1295 if (hdev == NULL)
1296 return;
1297
1298 for (i = 0; i < tpo->tpo_pool.po_size; i++) {
1299 tx = &tpo->tpo_tx_descs[i];
1300 kiblnd_dma_unmap_single(hdev->ibh_ibdev,
1301 KIBLND_UNMAP_ADDR(tx, tx_msgunmap,
1302 tx->tx_msgaddr),
1303 IBLND_MSG_SIZE, DMA_TO_DEVICE);
1304 }
1305
1306 kiblnd_hdev_decref(hdev);
1307 tpo->tpo_hdev = NULL;
1308}
1309
1310static kib_hca_dev_t *
1311kiblnd_current_hdev(kib_dev_t *dev)
1312{
1313 kib_hca_dev_t *hdev;
1314 unsigned long flags;
1315 int i = 0;
1316
1317 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1318 while (dev->ibd_failover) {
1319 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1320 if (i++ % 50 == 0)
1321 CDEBUG(D_NET, "%s: Wait for failover\n",
1322 dev->ibd_ifname);
1323 schedule_timeout(cfs_time_seconds(1) / 100);
1324
1325 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1326 }
1327
1328 kiblnd_hdev_addref_locked(dev->ibd_hdev);
1329 hdev = dev->ibd_hdev;
1330
1331 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1332
1333 return hdev;
1334}
1335
1336static void
1337kiblnd_map_tx_pool(kib_tx_pool_t *tpo)
1338{
1339 kib_pages_t *txpgs = tpo->tpo_tx_pages;
1340 kib_pool_t *pool = &tpo->tpo_pool;
1341 kib_net_t *net = pool->po_owner->ps_net;
1342 kib_dev_t *dev;
1343 struct page *page;
1344 kib_tx_t *tx;
1345 int page_offset;
1346 int ipage;
1347 int i;
1348
1349 LASSERT (net != NULL);
1350
1351 dev = net->ibn_dev;
1352
1353
1354 CLASSERT (IBLND_MSG_SIZE <= PAGE_SIZE);
1355
1356
1357 CLASSERT (PAGE_SIZE % IBLND_MSG_SIZE == 0);
1358
1359 tpo->tpo_hdev = kiblnd_current_hdev(dev);
1360
1361 for (ipage = page_offset = i = 0; i < pool->po_size; i++) {
1362 page = txpgs->ibp_pages[ipage];
1363 tx = &tpo->tpo_tx_descs[i];
1364
1365 tx->tx_msg = (kib_msg_t *)(((char *)page_address(page)) +
1366 page_offset);
1367
1368 tx->tx_msgaddr = kiblnd_dma_map_single(
1369 tpo->tpo_hdev->ibh_ibdev, tx->tx_msg,
1370 IBLND_MSG_SIZE, DMA_TO_DEVICE);
1371 LASSERT (!kiblnd_dma_mapping_error(tpo->tpo_hdev->ibh_ibdev,
1372 tx->tx_msgaddr));
1373 KIBLND_UNMAP_ADDR_SET(tx, tx_msgunmap, tx->tx_msgaddr);
1374
1375 list_add(&tx->tx_list, &pool->po_free_list);
1376
1377 page_offset += IBLND_MSG_SIZE;
1378 LASSERT (page_offset <= PAGE_SIZE);
1379
1380 if (page_offset == PAGE_SIZE) {
1381 page_offset = 0;
1382 ipage++;
1383 LASSERT (ipage <= txpgs->ibp_npages);
1384 }
1385 }
1386}
1387
1388struct ib_mr *
1389kiblnd_find_dma_mr(kib_hca_dev_t *hdev, __u64 addr, __u64 size)
1390{
1391 __u64 index;
1392
1393 LASSERT (hdev->ibh_mrs[0] != NULL);
1394
1395 if (hdev->ibh_nmrs == 1)
1396 return hdev->ibh_mrs[0];
1397
1398 index = addr >> hdev->ibh_mr_shift;
1399
1400 if (index < hdev->ibh_nmrs &&
1401 index == ((addr + size - 1) >> hdev->ibh_mr_shift))
1402 return hdev->ibh_mrs[index];
1403
1404 return NULL;
1405}
1406
1407struct ib_mr *
1408kiblnd_find_rd_dma_mr(kib_hca_dev_t *hdev, kib_rdma_desc_t *rd)
1409{
1410 struct ib_mr *prev_mr;
1411 struct ib_mr *mr;
1412 int i;
1413
1414 LASSERT (hdev->ibh_mrs[0] != NULL);
1415
1416 if (*kiblnd_tunables.kib_map_on_demand > 0 &&
1417 *kiblnd_tunables.kib_map_on_demand <= rd->rd_nfrags)
1418 return NULL;
1419
1420 if (hdev->ibh_nmrs == 1)
1421 return hdev->ibh_mrs[0];
1422
1423 for (i = 0, mr = prev_mr = NULL;
1424 i < rd->rd_nfrags; i++) {
1425 mr = kiblnd_find_dma_mr(hdev,
1426 rd->rd_frags[i].rf_addr,
1427 rd->rd_frags[i].rf_nob);
1428 if (prev_mr == NULL)
1429 prev_mr = mr;
1430
1431 if (mr == NULL || prev_mr != mr) {
1432
1433 mr = NULL;
1434 break;
1435 }
1436 }
1437
1438 return mr;
1439}
1440
1441void
1442kiblnd_destroy_fmr_pool(kib_fmr_pool_t *pool)
1443{
1444 LASSERT (pool->fpo_map_count == 0);
1445
1446 if (pool->fpo_fmr_pool != NULL)
1447 ib_destroy_fmr_pool(pool->fpo_fmr_pool);
1448
1449 if (pool->fpo_hdev != NULL)
1450 kiblnd_hdev_decref(pool->fpo_hdev);
1451
1452 LIBCFS_FREE(pool, sizeof(kib_fmr_pool_t));
1453}
1454
1455void
1456kiblnd_destroy_fmr_pool_list(struct list_head *head)
1457{
1458 kib_fmr_pool_t *pool;
1459
1460 while (!list_empty(head)) {
1461 pool = list_entry(head->next, kib_fmr_pool_t, fpo_list);
1462 list_del(&pool->fpo_list);
1463 kiblnd_destroy_fmr_pool(pool);
1464 }
1465}
1466
1467static int kiblnd_fmr_pool_size(int ncpts)
1468{
1469 int size = *kiblnd_tunables.kib_fmr_pool_size / ncpts;
1470
1471 return max(IBLND_FMR_POOL, size);
1472}
1473
1474static int kiblnd_fmr_flush_trigger(int ncpts)
1475{
1476 int size = *kiblnd_tunables.kib_fmr_flush_trigger / ncpts;
1477
1478 return max(IBLND_FMR_POOL_FLUSH, size);
1479}
1480
1481int
1482kiblnd_create_fmr_pool(kib_fmr_poolset_t *fps, kib_fmr_pool_t **pp_fpo)
1483{
1484
1485 kib_dev_t *dev = fps->fps_net->ibn_dev;
1486 kib_fmr_pool_t *fpo;
1487 struct ib_fmr_pool_param param = {
1488 .max_pages_per_fmr = LNET_MAX_PAYLOAD/PAGE_SIZE,
1489 .page_shift = PAGE_SHIFT,
1490 .access = (IB_ACCESS_LOCAL_WRITE |
1491 IB_ACCESS_REMOTE_WRITE),
1492 .pool_size = fps->fps_pool_size,
1493 .dirty_watermark = fps->fps_flush_trigger,
1494 .flush_function = NULL,
1495 .flush_arg = NULL,
1496 .cache = !!*kiblnd_tunables.kib_fmr_cache};
1497 int rc;
1498
1499 LIBCFS_CPT_ALLOC(fpo, lnet_cpt_table(), fps->fps_cpt, sizeof(*fpo));
1500 if (fpo == NULL)
1501 return -ENOMEM;
1502
1503 fpo->fpo_hdev = kiblnd_current_hdev(dev);
1504
1505 fpo->fpo_fmr_pool = ib_create_fmr_pool(fpo->fpo_hdev->ibh_pd, ¶m);
1506 if (IS_ERR(fpo->fpo_fmr_pool)) {
1507 rc = PTR_ERR(fpo->fpo_fmr_pool);
1508 CERROR("Failed to create FMR pool: %d\n", rc);
1509
1510 kiblnd_hdev_decref(fpo->fpo_hdev);
1511 LIBCFS_FREE(fpo, sizeof(kib_fmr_pool_t));
1512 return rc;
1513 }
1514
1515 fpo->fpo_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1516 fpo->fpo_owner = fps;
1517 *pp_fpo = fpo;
1518
1519 return 0;
1520}
1521
1522static void
1523kiblnd_fail_fmr_poolset(kib_fmr_poolset_t *fps, struct list_head *zombies)
1524{
1525 if (fps->fps_net == NULL)
1526 return;
1527
1528 spin_lock(&fps->fps_lock);
1529
1530 while (!list_empty(&fps->fps_pool_list)) {
1531 kib_fmr_pool_t *fpo = list_entry(fps->fps_pool_list.next,
1532 kib_fmr_pool_t, fpo_list);
1533 fpo->fpo_failed = 1;
1534 list_del(&fpo->fpo_list);
1535 if (fpo->fpo_map_count == 0)
1536 list_add(&fpo->fpo_list, zombies);
1537 else
1538 list_add(&fpo->fpo_list, &fps->fps_failed_pool_list);
1539 }
1540
1541 spin_unlock(&fps->fps_lock);
1542}
1543
1544static void
1545kiblnd_fini_fmr_poolset(kib_fmr_poolset_t *fps)
1546{
1547 if (fps->fps_net != NULL) {
1548 kiblnd_destroy_fmr_pool_list(&fps->fps_failed_pool_list);
1549 kiblnd_destroy_fmr_pool_list(&fps->fps_pool_list);
1550 }
1551}
1552
1553static int
1554kiblnd_init_fmr_poolset(kib_fmr_poolset_t *fps, int cpt, kib_net_t *net,
1555 int pool_size, int flush_trigger)
1556{
1557 kib_fmr_pool_t *fpo;
1558 int rc;
1559
1560 memset(fps, 0, sizeof(kib_fmr_poolset_t));
1561
1562 fps->fps_net = net;
1563 fps->fps_cpt = cpt;
1564 fps->fps_pool_size = pool_size;
1565 fps->fps_flush_trigger = flush_trigger;
1566 spin_lock_init(&fps->fps_lock);
1567 INIT_LIST_HEAD(&fps->fps_pool_list);
1568 INIT_LIST_HEAD(&fps->fps_failed_pool_list);
1569
1570 rc = kiblnd_create_fmr_pool(fps, &fpo);
1571 if (rc == 0)
1572 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1573
1574 return rc;
1575}
1576
1577static int
1578kiblnd_fmr_pool_is_idle(kib_fmr_pool_t *fpo, cfs_time_t now)
1579{
1580 if (fpo->fpo_map_count != 0)
1581 return 0;
1582 if (fpo->fpo_failed)
1583 return 1;
1584 return cfs_time_aftereq(now, fpo->fpo_deadline);
1585}
1586
1587void
1588kiblnd_fmr_pool_unmap(kib_fmr_t *fmr, int status)
1589{
1590 LIST_HEAD (zombies);
1591 kib_fmr_pool_t *fpo = fmr->fmr_pool;
1592 kib_fmr_poolset_t *fps = fpo->fpo_owner;
1593 cfs_time_t now = cfs_time_current();
1594 kib_fmr_pool_t *tmp;
1595 int rc;
1596
1597 rc = ib_fmr_pool_unmap(fmr->fmr_pfmr);
1598 LASSERT (rc == 0);
1599
1600 if (status != 0) {
1601 rc = ib_flush_fmr_pool(fpo->fpo_fmr_pool);
1602 LASSERT (rc == 0);
1603 }
1604
1605 fmr->fmr_pool = NULL;
1606 fmr->fmr_pfmr = NULL;
1607
1608 spin_lock(&fps->fps_lock);
1609 fpo->fpo_map_count --;
1610
1611 list_for_each_entry_safe(fpo, tmp, &fps->fps_pool_list, fpo_list) {
1612
1613 if (fps->fps_pool_list.next == &fpo->fpo_list)
1614 continue;
1615
1616 if (kiblnd_fmr_pool_is_idle(fpo, now)) {
1617 list_move(&fpo->fpo_list, &zombies);
1618 fps->fps_version ++;
1619 }
1620 }
1621 spin_unlock(&fps->fps_lock);
1622
1623 if (!list_empty(&zombies))
1624 kiblnd_destroy_fmr_pool_list(&zombies);
1625}
1626
1627int
1628kiblnd_fmr_pool_map(kib_fmr_poolset_t *fps, __u64 *pages, int npages,
1629 __u64 iov, kib_fmr_t *fmr)
1630{
1631 struct ib_pool_fmr *pfmr;
1632 kib_fmr_pool_t *fpo;
1633 __u64 version;
1634 int rc;
1635
1636 again:
1637 spin_lock(&fps->fps_lock);
1638 version = fps->fps_version;
1639 list_for_each_entry(fpo, &fps->fps_pool_list, fpo_list) {
1640 fpo->fpo_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1641 fpo->fpo_map_count++;
1642 spin_unlock(&fps->fps_lock);
1643
1644 pfmr = ib_fmr_pool_map_phys(fpo->fpo_fmr_pool,
1645 pages, npages, iov);
1646 if (likely(!IS_ERR(pfmr))) {
1647 fmr->fmr_pool = fpo;
1648 fmr->fmr_pfmr = pfmr;
1649 return 0;
1650 }
1651
1652 spin_lock(&fps->fps_lock);
1653 fpo->fpo_map_count--;
1654 if (PTR_ERR(pfmr) != -EAGAIN) {
1655 spin_unlock(&fps->fps_lock);
1656 return PTR_ERR(pfmr);
1657 }
1658
1659
1660 if (version != fps->fps_version) {
1661 spin_unlock(&fps->fps_lock);
1662 goto again;
1663 }
1664 }
1665
1666 if (fps->fps_increasing) {
1667 spin_unlock(&fps->fps_lock);
1668 CDEBUG(D_NET, "Another thread is allocating new "
1669 "FMR pool, waiting for her to complete\n");
1670 schedule();
1671 goto again;
1672
1673 }
1674
1675 if (cfs_time_before(cfs_time_current(), fps->fps_next_retry)) {
1676
1677 spin_unlock(&fps->fps_lock);
1678 return -EAGAIN;
1679 }
1680
1681 fps->fps_increasing = 1;
1682 spin_unlock(&fps->fps_lock);
1683
1684 CDEBUG(D_NET, "Allocate new FMR pool\n");
1685 rc = kiblnd_create_fmr_pool(fps, &fpo);
1686 spin_lock(&fps->fps_lock);
1687 fps->fps_increasing = 0;
1688 if (rc == 0) {
1689 fps->fps_version++;
1690 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1691 } else {
1692 fps->fps_next_retry = cfs_time_shift(IBLND_POOL_RETRY);
1693 }
1694 spin_unlock(&fps->fps_lock);
1695
1696 goto again;
1697}
1698
1699static void
1700kiblnd_fini_pool(kib_pool_t *pool)
1701{
1702 LASSERT (list_empty(&pool->po_free_list));
1703 LASSERT (pool->po_allocated == 0);
1704
1705 CDEBUG(D_NET, "Finalize %s pool\n", pool->po_owner->ps_name);
1706}
1707
1708static void
1709kiblnd_init_pool(kib_poolset_t *ps, kib_pool_t *pool, int size)
1710{
1711 CDEBUG(D_NET, "Initialize %s pool\n", ps->ps_name);
1712
1713 memset(pool, 0, sizeof(kib_pool_t));
1714 INIT_LIST_HEAD(&pool->po_free_list);
1715 pool->po_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1716 pool->po_owner = ps;
1717 pool->po_size = size;
1718}
1719
1720void
1721kiblnd_destroy_pool_list(struct list_head *head)
1722{
1723 kib_pool_t *pool;
1724
1725 while (!list_empty(head)) {
1726 pool = list_entry(head->next, kib_pool_t, po_list);
1727 list_del(&pool->po_list);
1728
1729 LASSERT (pool->po_owner != NULL);
1730 pool->po_owner->ps_pool_destroy(pool);
1731 }
1732}
1733
1734static void
1735kiblnd_fail_poolset(kib_poolset_t *ps, struct list_head *zombies)
1736{
1737 if (ps->ps_net == NULL)
1738 return;
1739
1740 spin_lock(&ps->ps_lock);
1741 while (!list_empty(&ps->ps_pool_list)) {
1742 kib_pool_t *po = list_entry(ps->ps_pool_list.next,
1743 kib_pool_t, po_list);
1744 po->po_failed = 1;
1745 list_del(&po->po_list);
1746 if (po->po_allocated == 0)
1747 list_add(&po->po_list, zombies);
1748 else
1749 list_add(&po->po_list, &ps->ps_failed_pool_list);
1750 }
1751 spin_unlock(&ps->ps_lock);
1752}
1753
1754static void
1755kiblnd_fini_poolset(kib_poolset_t *ps)
1756{
1757 if (ps->ps_net != NULL) {
1758 kiblnd_destroy_pool_list(&ps->ps_failed_pool_list);
1759 kiblnd_destroy_pool_list(&ps->ps_pool_list);
1760 }
1761}
1762
1763static int
1764kiblnd_init_poolset(kib_poolset_t *ps, int cpt,
1765 kib_net_t *net, char *name, int size,
1766 kib_ps_pool_create_t po_create,
1767 kib_ps_pool_destroy_t po_destroy,
1768 kib_ps_node_init_t nd_init,
1769 kib_ps_node_fini_t nd_fini)
1770{
1771 kib_pool_t *pool;
1772 int rc;
1773
1774 memset(ps, 0, sizeof(kib_poolset_t));
1775
1776 ps->ps_cpt = cpt;
1777 ps->ps_net = net;
1778 ps->ps_pool_create = po_create;
1779 ps->ps_pool_destroy = po_destroy;
1780 ps->ps_node_init = nd_init;
1781 ps->ps_node_fini = nd_fini;
1782 ps->ps_pool_size = size;
1783 if (strlcpy(ps->ps_name, name, sizeof(ps->ps_name))
1784 >= sizeof(ps->ps_name))
1785 return -E2BIG;
1786 spin_lock_init(&ps->ps_lock);
1787 INIT_LIST_HEAD(&ps->ps_pool_list);
1788 INIT_LIST_HEAD(&ps->ps_failed_pool_list);
1789
1790 rc = ps->ps_pool_create(ps, size, &pool);
1791 if (rc == 0)
1792 list_add(&pool->po_list, &ps->ps_pool_list);
1793 else
1794 CERROR("Failed to create the first pool for %s\n", ps->ps_name);
1795
1796 return rc;
1797}
1798
1799static int
1800kiblnd_pool_is_idle(kib_pool_t *pool, cfs_time_t now)
1801{
1802 if (pool->po_allocated != 0)
1803 return 0;
1804 if (pool->po_failed)
1805 return 1;
1806 return cfs_time_aftereq(now, pool->po_deadline);
1807}
1808
1809void
1810kiblnd_pool_free_node(kib_pool_t *pool, struct list_head *node)
1811{
1812 LIST_HEAD (zombies);
1813 kib_poolset_t *ps = pool->po_owner;
1814 kib_pool_t *tmp;
1815 cfs_time_t now = cfs_time_current();
1816
1817 spin_lock(&ps->ps_lock);
1818
1819 if (ps->ps_node_fini != NULL)
1820 ps->ps_node_fini(pool, node);
1821
1822 LASSERT (pool->po_allocated > 0);
1823 list_add(node, &pool->po_free_list);
1824 pool->po_allocated --;
1825
1826 list_for_each_entry_safe(pool, tmp, &ps->ps_pool_list, po_list) {
1827
1828 if (ps->ps_pool_list.next == &pool->po_list)
1829 continue;
1830
1831 if (kiblnd_pool_is_idle(pool, now))
1832 list_move(&pool->po_list, &zombies);
1833 }
1834 spin_unlock(&ps->ps_lock);
1835
1836 if (!list_empty(&zombies))
1837 kiblnd_destroy_pool_list(&zombies);
1838}
1839
1840struct list_head *
1841kiblnd_pool_alloc_node(kib_poolset_t *ps)
1842{
1843 struct list_head *node;
1844 kib_pool_t *pool;
1845 int rc;
1846
1847 again:
1848 spin_lock(&ps->ps_lock);
1849 list_for_each_entry(pool, &ps->ps_pool_list, po_list) {
1850 if (list_empty(&pool->po_free_list))
1851 continue;
1852
1853 pool->po_allocated ++;
1854 pool->po_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1855 node = pool->po_free_list.next;
1856 list_del(node);
1857
1858 if (ps->ps_node_init != NULL) {
1859
1860 ps->ps_node_init(pool, node);
1861 }
1862 spin_unlock(&ps->ps_lock);
1863 return node;
1864 }
1865
1866
1867 if (ps->ps_increasing) {
1868
1869 spin_unlock(&ps->ps_lock);
1870 CDEBUG(D_NET, "Another thread is allocating new "
1871 "%s pool, waiting for her to complete\n",
1872 ps->ps_name);
1873 schedule();
1874 goto again;
1875 }
1876
1877 if (cfs_time_before(cfs_time_current(), ps->ps_next_retry)) {
1878
1879 spin_unlock(&ps->ps_lock);
1880 return NULL;
1881 }
1882
1883 ps->ps_increasing = 1;
1884 spin_unlock(&ps->ps_lock);
1885
1886 CDEBUG(D_NET, "%s pool exhausted, allocate new pool\n", ps->ps_name);
1887
1888 rc = ps->ps_pool_create(ps, ps->ps_pool_size, &pool);
1889
1890 spin_lock(&ps->ps_lock);
1891 ps->ps_increasing = 0;
1892 if (rc == 0) {
1893 list_add_tail(&pool->po_list, &ps->ps_pool_list);
1894 } else {
1895 ps->ps_next_retry = cfs_time_shift(IBLND_POOL_RETRY);
1896 CERROR("Can't allocate new %s pool because out of memory\n",
1897 ps->ps_name);
1898 }
1899 spin_unlock(&ps->ps_lock);
1900
1901 goto again;
1902}
1903
1904void
1905kiblnd_pmr_pool_unmap(kib_phys_mr_t *pmr)
1906{
1907 kib_pmr_pool_t *ppo = pmr->pmr_pool;
1908 struct ib_mr *mr = pmr->pmr_mr;
1909
1910 pmr->pmr_mr = NULL;
1911 kiblnd_pool_free_node(&ppo->ppo_pool, &pmr->pmr_list);
1912 if (mr != NULL)
1913 ib_dereg_mr(mr);
1914}
1915
1916int
1917kiblnd_pmr_pool_map(kib_pmr_poolset_t *pps, kib_hca_dev_t *hdev,
1918 kib_rdma_desc_t *rd, __u64 *iova, kib_phys_mr_t **pp_pmr)
1919{
1920 kib_phys_mr_t *pmr;
1921 struct list_head *node;
1922 int rc;
1923 int i;
1924
1925 node = kiblnd_pool_alloc_node(&pps->pps_poolset);
1926 if (node == NULL) {
1927 CERROR("Failed to allocate PMR descriptor\n");
1928 return -ENOMEM;
1929 }
1930
1931 pmr = container_of(node, kib_phys_mr_t, pmr_list);
1932 if (pmr->pmr_pool->ppo_hdev != hdev) {
1933 kiblnd_pool_free_node(&pmr->pmr_pool->ppo_pool, node);
1934 return -EAGAIN;
1935 }
1936
1937 for (i = 0; i < rd->rd_nfrags; i ++) {
1938 pmr->pmr_ipb[i].addr = rd->rd_frags[i].rf_addr;
1939 pmr->pmr_ipb[i].size = rd->rd_frags[i].rf_nob;
1940 }
1941
1942 pmr->pmr_mr = ib_reg_phys_mr(hdev->ibh_pd,
1943 pmr->pmr_ipb, rd->rd_nfrags,
1944 IB_ACCESS_LOCAL_WRITE |
1945 IB_ACCESS_REMOTE_WRITE,
1946 iova);
1947 if (!IS_ERR(pmr->pmr_mr)) {
1948 pmr->pmr_iova = *iova;
1949 *pp_pmr = pmr;
1950 return 0;
1951 }
1952
1953 rc = PTR_ERR(pmr->pmr_mr);
1954 CERROR("Failed ib_reg_phys_mr: %d\n", rc);
1955
1956 pmr->pmr_mr = NULL;
1957 kiblnd_pool_free_node(&pmr->pmr_pool->ppo_pool, node);
1958
1959 return rc;
1960}
1961
1962static void
1963kiblnd_destroy_pmr_pool(kib_pool_t *pool)
1964{
1965 kib_pmr_pool_t *ppo = container_of(pool, kib_pmr_pool_t, ppo_pool);
1966 kib_phys_mr_t *pmr;
1967
1968 LASSERT (pool->po_allocated == 0);
1969
1970 while (!list_empty(&pool->po_free_list)) {
1971 pmr = list_entry(pool->po_free_list.next,
1972 kib_phys_mr_t, pmr_list);
1973
1974 LASSERT (pmr->pmr_mr == NULL);
1975 list_del(&pmr->pmr_list);
1976
1977 if (pmr->pmr_ipb != NULL) {
1978 LIBCFS_FREE(pmr->pmr_ipb,
1979 IBLND_MAX_RDMA_FRAGS *
1980 sizeof(struct ib_phys_buf));
1981 }
1982
1983 LIBCFS_FREE(pmr, sizeof(kib_phys_mr_t));
1984 }
1985
1986 kiblnd_fini_pool(pool);
1987 if (ppo->ppo_hdev != NULL)
1988 kiblnd_hdev_decref(ppo->ppo_hdev);
1989
1990 LIBCFS_FREE(ppo, sizeof(kib_pmr_pool_t));
1991}
1992
1993static inline int kiblnd_pmr_pool_size(int ncpts)
1994{
1995 int size = *kiblnd_tunables.kib_pmr_pool_size / ncpts;
1996
1997 return max(IBLND_PMR_POOL, size);
1998}
1999
2000static int
2001kiblnd_create_pmr_pool(kib_poolset_t *ps, int size, kib_pool_t **pp_po)
2002{
2003 struct kib_pmr_pool *ppo;
2004 struct kib_pool *pool;
2005 kib_phys_mr_t *pmr;
2006 int i;
2007
2008 LIBCFS_CPT_ALLOC(ppo, lnet_cpt_table(),
2009 ps->ps_cpt, sizeof(kib_pmr_pool_t));
2010 if (ppo == NULL) {
2011 CERROR("Failed to allocate PMR pool\n");
2012 return -ENOMEM;
2013 }
2014
2015 pool = &ppo->ppo_pool;
2016 kiblnd_init_pool(ps, pool, size);
2017
2018 for (i = 0; i < size; i++) {
2019 LIBCFS_CPT_ALLOC(pmr, lnet_cpt_table(),
2020 ps->ps_cpt, sizeof(kib_phys_mr_t));
2021 if (pmr == NULL)
2022 break;
2023
2024 pmr->pmr_pool = ppo;
2025 LIBCFS_CPT_ALLOC(pmr->pmr_ipb, lnet_cpt_table(), ps->ps_cpt,
2026 IBLND_MAX_RDMA_FRAGS * sizeof(*pmr->pmr_ipb));
2027 if (pmr->pmr_ipb == NULL)
2028 break;
2029
2030 list_add(&pmr->pmr_list, &pool->po_free_list);
2031 }
2032
2033 if (i < size) {
2034 ps->ps_pool_destroy(pool);
2035 return -ENOMEM;
2036 }
2037
2038 ppo->ppo_hdev = kiblnd_current_hdev(ps->ps_net->ibn_dev);
2039 *pp_po = pool;
2040 return 0;
2041}
2042
2043static void
2044kiblnd_destroy_tx_pool(kib_pool_t *pool)
2045{
2046 kib_tx_pool_t *tpo = container_of(pool, kib_tx_pool_t, tpo_pool);
2047 int i;
2048
2049 LASSERT (pool->po_allocated == 0);
2050
2051 if (tpo->tpo_tx_pages != NULL) {
2052 kiblnd_unmap_tx_pool(tpo);
2053 kiblnd_free_pages(tpo->tpo_tx_pages);
2054 }
2055
2056 if (tpo->tpo_tx_descs == NULL)
2057 goto out;
2058
2059 for (i = 0; i < pool->po_size; i++) {
2060 kib_tx_t *tx = &tpo->tpo_tx_descs[i];
2061
2062 list_del(&tx->tx_list);
2063 if (tx->tx_pages != NULL)
2064 LIBCFS_FREE(tx->tx_pages,
2065 LNET_MAX_IOV *
2066 sizeof(*tx->tx_pages));
2067 if (tx->tx_frags != NULL)
2068 LIBCFS_FREE(tx->tx_frags,
2069 IBLND_MAX_RDMA_FRAGS *
2070 sizeof(*tx->tx_frags));
2071 if (tx->tx_wrq != NULL)
2072 LIBCFS_FREE(tx->tx_wrq,
2073 (1 + IBLND_MAX_RDMA_FRAGS) *
2074 sizeof(*tx->tx_wrq));
2075 if (tx->tx_sge != NULL)
2076 LIBCFS_FREE(tx->tx_sge,
2077 (1 + IBLND_MAX_RDMA_FRAGS) *
2078 sizeof(*tx->tx_sge));
2079 if (tx->tx_rd != NULL)
2080 LIBCFS_FREE(tx->tx_rd,
2081 offsetof(kib_rdma_desc_t,
2082 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2083 }
2084
2085 LIBCFS_FREE(tpo->tpo_tx_descs,
2086 pool->po_size * sizeof(kib_tx_t));
2087out:
2088 kiblnd_fini_pool(pool);
2089 LIBCFS_FREE(tpo, sizeof(kib_tx_pool_t));
2090}
2091
2092static int kiblnd_tx_pool_size(int ncpts)
2093{
2094 int ntx = *kiblnd_tunables.kib_ntx / ncpts;
2095
2096 return max(IBLND_TX_POOL, ntx);
2097}
2098
2099static int
2100kiblnd_create_tx_pool(kib_poolset_t *ps, int size, kib_pool_t **pp_po)
2101{
2102 int i;
2103 int npg;
2104 kib_pool_t *pool;
2105 kib_tx_pool_t *tpo;
2106
2107 LIBCFS_CPT_ALLOC(tpo, lnet_cpt_table(), ps->ps_cpt, sizeof(*tpo));
2108 if (tpo == NULL) {
2109 CERROR("Failed to allocate TX pool\n");
2110 return -ENOMEM;
2111 }
2112
2113 pool = &tpo->tpo_pool;
2114 kiblnd_init_pool(ps, pool, size);
2115 tpo->tpo_tx_descs = NULL;
2116 tpo->tpo_tx_pages = NULL;
2117
2118 npg = (size * IBLND_MSG_SIZE + PAGE_SIZE - 1) / PAGE_SIZE;
2119 if (kiblnd_alloc_pages(&tpo->tpo_tx_pages, ps->ps_cpt, npg) != 0) {
2120 CERROR("Can't allocate tx pages: %d\n", npg);
2121 LIBCFS_FREE(tpo, sizeof(kib_tx_pool_t));
2122 return -ENOMEM;
2123 }
2124
2125 LIBCFS_CPT_ALLOC(tpo->tpo_tx_descs, lnet_cpt_table(), ps->ps_cpt,
2126 size * sizeof(kib_tx_t));
2127 if (tpo->tpo_tx_descs == NULL) {
2128 CERROR("Can't allocate %d tx descriptors\n", size);
2129 ps->ps_pool_destroy(pool);
2130 return -ENOMEM;
2131 }
2132
2133 memset(tpo->tpo_tx_descs, 0, size * sizeof(kib_tx_t));
2134
2135 for (i = 0; i < size; i++) {
2136 kib_tx_t *tx = &tpo->tpo_tx_descs[i];
2137
2138 tx->tx_pool = tpo;
2139 if (ps->ps_net->ibn_fmr_ps != NULL) {
2140 LIBCFS_CPT_ALLOC(tx->tx_pages,
2141 lnet_cpt_table(), ps->ps_cpt,
2142 LNET_MAX_IOV * sizeof(*tx->tx_pages));
2143 if (tx->tx_pages == NULL)
2144 break;
2145 }
2146
2147 LIBCFS_CPT_ALLOC(tx->tx_frags, lnet_cpt_table(), ps->ps_cpt,
2148 IBLND_MAX_RDMA_FRAGS * sizeof(*tx->tx_frags));
2149 if (tx->tx_frags == NULL)
2150 break;
2151
2152 sg_init_table(tx->tx_frags, IBLND_MAX_RDMA_FRAGS);
2153
2154 LIBCFS_CPT_ALLOC(tx->tx_wrq, lnet_cpt_table(), ps->ps_cpt,
2155 (1 + IBLND_MAX_RDMA_FRAGS) *
2156 sizeof(*tx->tx_wrq));
2157 if (tx->tx_wrq == NULL)
2158 break;
2159
2160 LIBCFS_CPT_ALLOC(tx->tx_sge, lnet_cpt_table(), ps->ps_cpt,
2161 (1 + IBLND_MAX_RDMA_FRAGS) *
2162 sizeof(*tx->tx_sge));
2163 if (tx->tx_sge == NULL)
2164 break;
2165
2166 LIBCFS_CPT_ALLOC(tx->tx_rd, lnet_cpt_table(), ps->ps_cpt,
2167 offsetof(kib_rdma_desc_t,
2168 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2169 if (tx->tx_rd == NULL)
2170 break;
2171 }
2172
2173 if (i == size) {
2174 kiblnd_map_tx_pool(tpo);
2175 *pp_po = pool;
2176 return 0;
2177 }
2178
2179 ps->ps_pool_destroy(pool);
2180 return -ENOMEM;
2181}
2182
2183static void
2184kiblnd_tx_init(kib_pool_t *pool, struct list_head *node)
2185{
2186 kib_tx_poolset_t *tps = container_of(pool->po_owner, kib_tx_poolset_t,
2187 tps_poolset);
2188 kib_tx_t *tx = list_entry(node, kib_tx_t, tx_list);
2189
2190 tx->tx_cookie = tps->tps_next_tx_cookie ++;
2191}
2192
2193void
2194kiblnd_net_fini_pools(kib_net_t *net)
2195{
2196 int i;
2197
2198 cfs_cpt_for_each(i, lnet_cpt_table()) {
2199 kib_tx_poolset_t *tps;
2200 kib_fmr_poolset_t *fps;
2201 kib_pmr_poolset_t *pps;
2202
2203 if (net->ibn_tx_ps != NULL) {
2204 tps = net->ibn_tx_ps[i];
2205 kiblnd_fini_poolset(&tps->tps_poolset);
2206 }
2207
2208 if (net->ibn_fmr_ps != NULL) {
2209 fps = net->ibn_fmr_ps[i];
2210 kiblnd_fini_fmr_poolset(fps);
2211 }
2212
2213 if (net->ibn_pmr_ps != NULL) {
2214 pps = net->ibn_pmr_ps[i];
2215 kiblnd_fini_poolset(&pps->pps_poolset);
2216 }
2217 }
2218
2219 if (net->ibn_tx_ps != NULL) {
2220 cfs_percpt_free(net->ibn_tx_ps);
2221 net->ibn_tx_ps = NULL;
2222 }
2223
2224 if (net->ibn_fmr_ps != NULL) {
2225 cfs_percpt_free(net->ibn_fmr_ps);
2226 net->ibn_fmr_ps = NULL;
2227 }
2228
2229 if (net->ibn_pmr_ps != NULL) {
2230 cfs_percpt_free(net->ibn_pmr_ps);
2231 net->ibn_pmr_ps = NULL;
2232 }
2233}
2234
2235int
2236kiblnd_net_init_pools(kib_net_t *net, __u32 *cpts, int ncpts)
2237{
2238 unsigned long flags;
2239 int cpt;
2240 int rc;
2241 int i;
2242
2243 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2244 if (*kiblnd_tunables.kib_map_on_demand == 0 &&
2245 net->ibn_dev->ibd_hdev->ibh_nmrs == 1) {
2246 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
2247 flags);
2248 goto create_tx_pool;
2249 }
2250
2251 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2252
2253 if (*kiblnd_tunables.kib_fmr_pool_size <
2254 *kiblnd_tunables.kib_ntx / 4) {
2255 CERROR("Can't set fmr pool size (%d) < ntx / 4(%d)\n",
2256 *kiblnd_tunables.kib_fmr_pool_size,
2257 *kiblnd_tunables.kib_ntx / 4);
2258 rc = -EINVAL;
2259 goto failed;
2260 }
2261
2262
2263
2264 LASSERT(net->ibn_tx_ps == NULL);
2265
2266
2267
2268
2269 net->ibn_fmr_ps = cfs_percpt_alloc(lnet_cpt_table(),
2270 sizeof(kib_fmr_poolset_t));
2271 if (net->ibn_fmr_ps == NULL) {
2272 CERROR("Failed to allocate FMR pool array\n");
2273 rc = -ENOMEM;
2274 goto failed;
2275 }
2276
2277 for (i = 0; i < ncpts; i++) {
2278 cpt = (cpts == NULL) ? i : cpts[i];
2279 rc = kiblnd_init_fmr_poolset(net->ibn_fmr_ps[cpt], cpt, net,
2280 kiblnd_fmr_pool_size(ncpts),
2281 kiblnd_fmr_flush_trigger(ncpts));
2282 if (rc == -ENOSYS && i == 0)
2283 break;
2284
2285 if (rc != 0) {
2286 CERROR("Can't initialize FMR pool for CPT %d: %d\n",
2287 cpt, rc);
2288 goto failed;
2289 }
2290 }
2291
2292 if (i > 0) {
2293 LASSERT(i == ncpts);
2294 goto create_tx_pool;
2295 }
2296
2297 cfs_percpt_free(net->ibn_fmr_ps);
2298 net->ibn_fmr_ps = NULL;
2299
2300 CWARN("Device does not support FMR, failing back to PMR\n");
2301
2302 if (*kiblnd_tunables.kib_pmr_pool_size <
2303 *kiblnd_tunables.kib_ntx / 4) {
2304 CERROR("Can't set pmr pool size (%d) < ntx / 4(%d)\n",
2305 *kiblnd_tunables.kib_pmr_pool_size,
2306 *kiblnd_tunables.kib_ntx / 4);
2307 rc = -EINVAL;
2308 goto failed;
2309 }
2310
2311 net->ibn_pmr_ps = cfs_percpt_alloc(lnet_cpt_table(),
2312 sizeof(kib_pmr_poolset_t));
2313 if (net->ibn_pmr_ps == NULL) {
2314 CERROR("Failed to allocate PMR pool array\n");
2315 rc = -ENOMEM;
2316 goto failed;
2317 }
2318
2319 for (i = 0; i < ncpts; i++) {
2320 cpt = (cpts == NULL) ? i : cpts[i];
2321 rc = kiblnd_init_poolset(&net->ibn_pmr_ps[cpt]->pps_poolset,
2322 cpt, net, "PMR",
2323 kiblnd_pmr_pool_size(ncpts),
2324 kiblnd_create_pmr_pool,
2325 kiblnd_destroy_pmr_pool, NULL, NULL);
2326 if (rc != 0) {
2327 CERROR("Can't initialize PMR pool for CPT %d: %d\n",
2328 cpt, rc);
2329 goto failed;
2330 }
2331 }
2332
2333 create_tx_pool:
2334 net->ibn_tx_ps = cfs_percpt_alloc(lnet_cpt_table(),
2335 sizeof(kib_tx_poolset_t));
2336 if (net->ibn_tx_ps == NULL) {
2337 CERROR("Failed to allocate tx pool array\n");
2338 rc = -ENOMEM;
2339 goto failed;
2340 }
2341
2342 for (i = 0; i < ncpts; i++) {
2343 cpt = (cpts == NULL) ? i : cpts[i];
2344 rc = kiblnd_init_poolset(&net->ibn_tx_ps[cpt]->tps_poolset,
2345 cpt, net, "TX",
2346 kiblnd_tx_pool_size(ncpts),
2347 kiblnd_create_tx_pool,
2348 kiblnd_destroy_tx_pool,
2349 kiblnd_tx_init, NULL);
2350 if (rc != 0) {
2351 CERROR("Can't initialize TX pool for CPT %d: %d\n",
2352 cpt, rc);
2353 goto failed;
2354 }
2355 }
2356
2357 return 0;
2358 failed:
2359 kiblnd_net_fini_pools(net);
2360 LASSERT(rc != 0);
2361 return rc;
2362}
2363
2364static int
2365kiblnd_hdev_get_attr(kib_hca_dev_t *hdev)
2366{
2367 struct ib_device_attr *attr;
2368 int rc;
2369
2370
2371
2372 hdev->ibh_page_shift = PAGE_SHIFT;
2373 hdev->ibh_page_size = 1 << PAGE_SHIFT;
2374 hdev->ibh_page_mask = ~((__u64)hdev->ibh_page_size - 1);
2375
2376 LIBCFS_ALLOC(attr, sizeof(*attr));
2377 if (attr == NULL) {
2378 CERROR("Out of memory\n");
2379 return -ENOMEM;
2380 }
2381
2382 rc = ib_query_device(hdev->ibh_ibdev, attr);
2383 if (rc == 0)
2384 hdev->ibh_mr_size = attr->max_mr_size;
2385
2386 LIBCFS_FREE(attr, sizeof(*attr));
2387
2388 if (rc != 0) {
2389 CERROR("Failed to query IB device: %d\n", rc);
2390 return rc;
2391 }
2392
2393 if (hdev->ibh_mr_size == ~0ULL) {
2394 hdev->ibh_mr_shift = 64;
2395 return 0;
2396 }
2397
2398 for (hdev->ibh_mr_shift = 0;
2399 hdev->ibh_mr_shift < 64; hdev->ibh_mr_shift ++) {
2400 if (hdev->ibh_mr_size == (1ULL << hdev->ibh_mr_shift) ||
2401 hdev->ibh_mr_size == (1ULL << hdev->ibh_mr_shift) - 1)
2402 return 0;
2403 }
2404
2405 CERROR("Invalid mr size: "LPX64"\n", hdev->ibh_mr_size);
2406 return -EINVAL;
2407}
2408
2409void
2410kiblnd_hdev_cleanup_mrs(kib_hca_dev_t *hdev)
2411{
2412 int i;
2413
2414 if (hdev->ibh_nmrs == 0 || hdev->ibh_mrs == NULL)
2415 return;
2416
2417 for (i = 0; i < hdev->ibh_nmrs; i++) {
2418 if (hdev->ibh_mrs[i] == NULL)
2419 break;
2420
2421 ib_dereg_mr(hdev->ibh_mrs[i]);
2422 }
2423
2424 LIBCFS_FREE(hdev->ibh_mrs, sizeof(*hdev->ibh_mrs) * hdev->ibh_nmrs);
2425 hdev->ibh_mrs = NULL;
2426 hdev->ibh_nmrs = 0;
2427}
2428
2429void
2430kiblnd_hdev_destroy(kib_hca_dev_t *hdev)
2431{
2432 kiblnd_hdev_cleanup_mrs(hdev);
2433
2434 if (hdev->ibh_pd != NULL)
2435 ib_dealloc_pd(hdev->ibh_pd);
2436
2437 if (hdev->ibh_cmid != NULL)
2438 rdma_destroy_id(hdev->ibh_cmid);
2439
2440 LIBCFS_FREE(hdev, sizeof(*hdev));
2441}
2442
2443int
2444kiblnd_hdev_setup_mrs(kib_hca_dev_t *hdev)
2445{
2446 struct ib_mr *mr;
2447 int i;
2448 int rc;
2449 __u64 mm_size;
2450 __u64 mr_size;
2451 int acflags = IB_ACCESS_LOCAL_WRITE |
2452 IB_ACCESS_REMOTE_WRITE;
2453
2454 rc = kiblnd_hdev_get_attr(hdev);
2455 if (rc != 0)
2456 return rc;
2457
2458 if (hdev->ibh_mr_shift == 64) {
2459 LIBCFS_ALLOC(hdev->ibh_mrs, 1 * sizeof(*hdev->ibh_mrs));
2460 if (hdev->ibh_mrs == NULL) {
2461 CERROR("Failed to allocate MRs table\n");
2462 return -ENOMEM;
2463 }
2464
2465 hdev->ibh_mrs[0] = NULL;
2466 hdev->ibh_nmrs = 1;
2467
2468 mr = ib_get_dma_mr(hdev->ibh_pd, acflags);
2469 if (IS_ERR(mr)) {
2470 CERROR("Failed ib_get_dma_mr : %ld\n", PTR_ERR(mr));
2471 kiblnd_hdev_cleanup_mrs(hdev);
2472 return PTR_ERR(mr);
2473 }
2474
2475 hdev->ibh_mrs[0] = mr;
2476
2477 goto out;
2478 }
2479
2480 mr_size = (1ULL << hdev->ibh_mr_shift);
2481 mm_size = (unsigned long)high_memory - PAGE_OFFSET;
2482
2483 hdev->ibh_nmrs = (int)((mm_size + mr_size - 1) >> hdev->ibh_mr_shift);
2484
2485 if (hdev->ibh_mr_shift < 32 || hdev->ibh_nmrs > 1024) {
2486
2487 CERROR("Can't support memory size: x"LPX64
2488 " with MR size: x"LPX64"\n", mm_size, mr_size);
2489 return -EINVAL;
2490 }
2491
2492
2493 LIBCFS_ALLOC(hdev->ibh_mrs, sizeof(*hdev->ibh_mrs) * hdev->ibh_nmrs);
2494 if (hdev->ibh_mrs == NULL) {
2495 CERROR("Failed to allocate MRs' table\n");
2496 return -ENOMEM;
2497 }
2498
2499 memset(hdev->ibh_mrs, 0, sizeof(*hdev->ibh_mrs) * hdev->ibh_nmrs);
2500
2501 for (i = 0; i < hdev->ibh_nmrs; i++) {
2502 struct ib_phys_buf ipb;
2503 __u64 iova;
2504
2505 ipb.size = hdev->ibh_mr_size;
2506 ipb.addr = i * mr_size;
2507 iova = ipb.addr;
2508
2509 mr = ib_reg_phys_mr(hdev->ibh_pd, &ipb, 1, acflags, &iova);
2510 if (IS_ERR(mr)) {
2511 CERROR("Failed ib_reg_phys_mr addr "LPX64
2512 " size "LPX64" : %ld\n",
2513 ipb.addr, ipb.size, PTR_ERR(mr));
2514 kiblnd_hdev_cleanup_mrs(hdev);
2515 return PTR_ERR(mr);
2516 }
2517
2518 LASSERT (iova == ipb.addr);
2519
2520 hdev->ibh_mrs[i] = mr;
2521 }
2522
2523out:
2524 if (hdev->ibh_mr_size != ~0ULL || hdev->ibh_nmrs != 1)
2525 LCONSOLE_INFO("Register global MR array, MR size: "
2526 LPX64", array size: %d\n",
2527 hdev->ibh_mr_size, hdev->ibh_nmrs);
2528 return 0;
2529}
2530
2531static int
2532kiblnd_dummy_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event)
2533{
2534 return 0;
2535}
2536
2537static int
2538kiblnd_dev_need_failover(kib_dev_t *dev)
2539{
2540 struct rdma_cm_id *cmid;
2541 struct sockaddr_in srcaddr;
2542 struct sockaddr_in dstaddr;
2543 int rc;
2544
2545 if (dev->ibd_hdev == NULL ||
2546 dev->ibd_hdev->ibh_cmid == NULL ||
2547 *kiblnd_tunables.kib_dev_failover > 1)
2548 return 1;
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560 cmid = kiblnd_rdma_create_id(kiblnd_dummy_callback, dev, RDMA_PS_TCP,
2561 IB_QPT_RC);
2562 if (IS_ERR(cmid)) {
2563 rc = PTR_ERR(cmid);
2564 CERROR("Failed to create cmid for failover: %d\n", rc);
2565 return rc;
2566 }
2567
2568 memset(&srcaddr, 0, sizeof(srcaddr));
2569 srcaddr.sin_family = AF_INET;
2570 srcaddr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2571
2572 memset(&dstaddr, 0, sizeof(dstaddr));
2573 dstaddr.sin_family = AF_INET;
2574 rc = rdma_resolve_addr(cmid, (struct sockaddr *)&srcaddr,
2575 (struct sockaddr *)&dstaddr, 1);
2576 if (rc != 0 || cmid->device == NULL) {
2577 CERROR("Failed to bind %s:%u.%u.%u.%u to device(%p): %d\n",
2578 dev->ibd_ifname, HIPQUAD(dev->ibd_ifip),
2579 cmid->device, rc);
2580 rdma_destroy_id(cmid);
2581 return rc;
2582 }
2583
2584 if (dev->ibd_hdev->ibh_ibdev == cmid->device) {
2585
2586 rdma_destroy_id(cmid);
2587 return 0;
2588 }
2589
2590 return 1;
2591}
2592
2593int
2594kiblnd_dev_failover(kib_dev_t *dev)
2595{
2596 LIST_HEAD (zombie_tpo);
2597 LIST_HEAD (zombie_ppo);
2598 LIST_HEAD (zombie_fpo);
2599 struct rdma_cm_id *cmid = NULL;
2600 kib_hca_dev_t *hdev = NULL;
2601 kib_hca_dev_t *old;
2602 struct ib_pd *pd;
2603 kib_net_t *net;
2604 struct sockaddr_in addr;
2605 unsigned long flags;
2606 int rc = 0;
2607 int i;
2608
2609 LASSERT (*kiblnd_tunables.kib_dev_failover > 1 ||
2610 dev->ibd_can_failover ||
2611 dev->ibd_hdev == NULL);
2612
2613 rc = kiblnd_dev_need_failover(dev);
2614 if (rc <= 0)
2615 goto out;
2616
2617 if (dev->ibd_hdev != NULL &&
2618 dev->ibd_hdev->ibh_cmid != NULL) {
2619
2620
2621
2622
2623 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2624
2625 cmid = dev->ibd_hdev->ibh_cmid;
2626
2627
2628 dev->ibd_hdev->ibh_cmid = NULL;
2629 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2630
2631 rdma_destroy_id(cmid);
2632 }
2633
2634 cmid = kiblnd_rdma_create_id(kiblnd_cm_callback, dev, RDMA_PS_TCP,
2635 IB_QPT_RC);
2636 if (IS_ERR(cmid)) {
2637 rc = PTR_ERR(cmid);
2638 CERROR("Failed to create cmid for failover: %d\n", rc);
2639 goto out;
2640 }
2641
2642 memset(&addr, 0, sizeof(addr));
2643 addr.sin_family = AF_INET;
2644 addr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2645 addr.sin_port = htons(*kiblnd_tunables.kib_service);
2646
2647
2648 rc = rdma_bind_addr(cmid, (struct sockaddr *)&addr);
2649 if (rc != 0 || cmid->device == NULL) {
2650 CERROR("Failed to bind %s:%u.%u.%u.%u to device(%p): %d\n",
2651 dev->ibd_ifname, HIPQUAD(dev->ibd_ifip),
2652 cmid->device, rc);
2653 rdma_destroy_id(cmid);
2654 goto out;
2655 }
2656
2657 LIBCFS_ALLOC(hdev, sizeof(*hdev));
2658 if (hdev == NULL) {
2659 CERROR("Failed to allocate kib_hca_dev\n");
2660 rdma_destroy_id(cmid);
2661 rc = -ENOMEM;
2662 goto out;
2663 }
2664
2665 atomic_set(&hdev->ibh_ref, 1);
2666 hdev->ibh_dev = dev;
2667 hdev->ibh_cmid = cmid;
2668 hdev->ibh_ibdev = cmid->device;
2669
2670 pd = ib_alloc_pd(cmid->device);
2671 if (IS_ERR(pd)) {
2672 rc = PTR_ERR(pd);
2673 CERROR("Can't allocate PD: %d\n", rc);
2674 goto out;
2675 }
2676
2677 hdev->ibh_pd = pd;
2678
2679 rc = rdma_listen(cmid, 0);
2680 if (rc != 0) {
2681 CERROR("Can't start new listener: %d\n", rc);
2682 goto out;
2683 }
2684
2685 rc = kiblnd_hdev_setup_mrs(hdev);
2686 if (rc != 0) {
2687 CERROR("Can't setup device: %d\n", rc);
2688 goto out;
2689 }
2690
2691 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2692
2693 old = dev->ibd_hdev;
2694 dev->ibd_hdev = hdev;
2695 hdev = old;
2696
2697 list_for_each_entry(net, &dev->ibd_nets, ibn_list) {
2698 cfs_cpt_for_each(i, lnet_cpt_table()) {
2699 kiblnd_fail_poolset(&net->ibn_tx_ps[i]->tps_poolset,
2700 &zombie_tpo);
2701
2702 if (net->ibn_fmr_ps != NULL) {
2703 kiblnd_fail_fmr_poolset(net->ibn_fmr_ps[i],
2704 &zombie_fpo);
2705
2706 } else if (net->ibn_pmr_ps != NULL) {
2707 kiblnd_fail_poolset(&net->ibn_pmr_ps[i]->
2708 pps_poolset, &zombie_ppo);
2709 }
2710 }
2711 }
2712
2713 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2714 out:
2715 if (!list_empty(&zombie_tpo))
2716 kiblnd_destroy_pool_list(&zombie_tpo);
2717 if (!list_empty(&zombie_ppo))
2718 kiblnd_destroy_pool_list(&zombie_ppo);
2719 if (!list_empty(&zombie_fpo))
2720 kiblnd_destroy_fmr_pool_list(&zombie_fpo);
2721 if (hdev != NULL)
2722 kiblnd_hdev_decref(hdev);
2723
2724 if (rc != 0)
2725 dev->ibd_failed_failover++;
2726 else
2727 dev->ibd_failed_failover = 0;
2728
2729 return rc;
2730}
2731
2732void
2733kiblnd_destroy_dev (kib_dev_t *dev)
2734{
2735 LASSERT (dev->ibd_nnets == 0);
2736 LASSERT (list_empty(&dev->ibd_nets));
2737
2738 list_del(&dev->ibd_fail_list);
2739 list_del(&dev->ibd_list);
2740
2741 if (dev->ibd_hdev != NULL)
2742 kiblnd_hdev_decref(dev->ibd_hdev);
2743
2744 LIBCFS_FREE(dev, sizeof(*dev));
2745}
2746
2747kib_dev_t *
2748kiblnd_create_dev(char *ifname)
2749{
2750 struct net_device *netdev;
2751 kib_dev_t *dev;
2752 __u32 netmask;
2753 __u32 ip;
2754 int up;
2755 int rc;
2756
2757 rc = libcfs_ipif_query(ifname, &up, &ip, &netmask);
2758 if (rc != 0) {
2759 CERROR("Can't query IPoIB interface %s: %d\n",
2760 ifname, rc);
2761 return NULL;
2762 }
2763
2764 if (!up) {
2765 CERROR("Can't query IPoIB interface %s: it's down\n", ifname);
2766 return NULL;
2767 }
2768
2769 LIBCFS_ALLOC(dev, sizeof(*dev));
2770 if (dev == NULL)
2771 return NULL;
2772
2773 memset(dev, 0, sizeof(*dev));
2774 netdev = dev_get_by_name(&init_net, ifname);
2775 if (netdev == NULL) {
2776 dev->ibd_can_failover = 0;
2777 } else {
2778 dev->ibd_can_failover = !!(netdev->flags & IFF_MASTER);
2779 dev_put(netdev);
2780 }
2781
2782 INIT_LIST_HEAD(&dev->ibd_nets);
2783 INIT_LIST_HEAD(&dev->ibd_list);
2784 INIT_LIST_HEAD(&dev->ibd_fail_list);
2785 dev->ibd_ifip = ip;
2786 strcpy(&dev->ibd_ifname[0], ifname);
2787
2788
2789 rc = kiblnd_dev_failover(dev);
2790 if (rc != 0) {
2791 CERROR("Can't initialize device: %d\n", rc);
2792 LIBCFS_FREE(dev, sizeof(*dev));
2793 return NULL;
2794 }
2795
2796 list_add_tail(&dev->ibd_list,
2797 &kiblnd_data.kib_devs);
2798 return dev;
2799}
2800
2801void
2802kiblnd_base_shutdown(void)
2803{
2804 struct kib_sched_info *sched;
2805 int i;
2806
2807 LASSERT (list_empty(&kiblnd_data.kib_devs));
2808
2809 CDEBUG(D_MALLOC, "before LND base cleanup: kmem %d\n",
2810 atomic_read(&libcfs_kmemory));
2811
2812 switch (kiblnd_data.kib_init) {
2813 default:
2814 LBUG();
2815
2816 case IBLND_INIT_ALL:
2817 case IBLND_INIT_DATA:
2818 LASSERT (kiblnd_data.kib_peers != NULL);
2819 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
2820 LASSERT (list_empty(&kiblnd_data.kib_peers[i]));
2821 }
2822 LASSERT (list_empty(&kiblnd_data.kib_connd_zombies));
2823 LASSERT (list_empty(&kiblnd_data.kib_connd_conns));
2824
2825
2826 kiblnd_data.kib_shutdown = 1;
2827
2828
2829
2830
2831 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds)
2832 wake_up_all(&sched->ibs_waitq);
2833
2834 wake_up_all(&kiblnd_data.kib_connd_waitq);
2835 wake_up_all(&kiblnd_data.kib_failover_waitq);
2836
2837 i = 2;
2838 while (atomic_read(&kiblnd_data.kib_nthreads) != 0) {
2839 i++;
2840 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET,
2841 "Waiting for %d threads to terminate\n",
2842 atomic_read(&kiblnd_data.kib_nthreads));
2843 cfs_pause(cfs_time_seconds(1));
2844 }
2845
2846
2847
2848 case IBLND_INIT_NOTHING:
2849 break;
2850 }
2851
2852 if (kiblnd_data.kib_peers != NULL) {
2853 LIBCFS_FREE(kiblnd_data.kib_peers,
2854 sizeof(struct list_head) *
2855 kiblnd_data.kib_peer_hash_size);
2856 }
2857
2858 if (kiblnd_data.kib_scheds != NULL)
2859 cfs_percpt_free(kiblnd_data.kib_scheds);
2860
2861 CDEBUG(D_MALLOC, "after LND base cleanup: kmem %d\n",
2862 atomic_read(&libcfs_kmemory));
2863
2864 kiblnd_data.kib_init = IBLND_INIT_NOTHING;
2865 module_put(THIS_MODULE);
2866}
2867
2868void
2869kiblnd_shutdown (lnet_ni_t *ni)
2870{
2871 kib_net_t *net = ni->ni_data;
2872 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2873 int i;
2874 unsigned long flags;
2875
2876 LASSERT(kiblnd_data.kib_init == IBLND_INIT_ALL);
2877
2878 if (net == NULL)
2879 goto out;
2880
2881 CDEBUG(D_MALLOC, "before LND net cleanup: kmem %d\n",
2882 atomic_read(&libcfs_kmemory));
2883
2884 write_lock_irqsave(g_lock, flags);
2885 net->ibn_shutdown = 1;
2886 write_unlock_irqrestore(g_lock, flags);
2887
2888 switch (net->ibn_init) {
2889 default:
2890 LBUG();
2891
2892 case IBLND_INIT_ALL:
2893
2894 kiblnd_del_peer(ni, LNET_NID_ANY);
2895
2896
2897 i = 2;
2898 while (atomic_read(&net->ibn_npeers) != 0) {
2899 i++;
2900 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET,
2901 "%s: waiting for %d peers to disconnect\n",
2902 libcfs_nid2str(ni->ni_nid),
2903 atomic_read(&net->ibn_npeers));
2904 cfs_pause(cfs_time_seconds(1));
2905 }
2906
2907 kiblnd_net_fini_pools(net);
2908
2909 write_lock_irqsave(g_lock, flags);
2910 LASSERT(net->ibn_dev->ibd_nnets > 0);
2911 net->ibn_dev->ibd_nnets--;
2912 list_del(&net->ibn_list);
2913 write_unlock_irqrestore(g_lock, flags);
2914
2915
2916
2917 case IBLND_INIT_NOTHING:
2918 LASSERT (atomic_read(&net->ibn_nconns) == 0);
2919
2920 if (net->ibn_dev != NULL &&
2921 net->ibn_dev->ibd_nnets == 0)
2922 kiblnd_destroy_dev(net->ibn_dev);
2923
2924 break;
2925 }
2926
2927 CDEBUG(D_MALLOC, "after LND net cleanup: kmem %d\n",
2928 atomic_read(&libcfs_kmemory));
2929
2930 net->ibn_init = IBLND_INIT_NOTHING;
2931 ni->ni_data = NULL;
2932
2933 LIBCFS_FREE(net, sizeof(*net));
2934
2935out:
2936 if (list_empty(&kiblnd_data.kib_devs))
2937 kiblnd_base_shutdown();
2938 return;
2939}
2940
2941int
2942kiblnd_base_startup(void)
2943{
2944 struct kib_sched_info *sched;
2945 int rc;
2946 int i;
2947
2948 LASSERT (kiblnd_data.kib_init == IBLND_INIT_NOTHING);
2949
2950 try_module_get(THIS_MODULE);
2951 memset(&kiblnd_data, 0, sizeof(kiblnd_data));
2952
2953 rwlock_init(&kiblnd_data.kib_global_lock);
2954
2955 INIT_LIST_HEAD(&kiblnd_data.kib_devs);
2956 INIT_LIST_HEAD(&kiblnd_data.kib_failed_devs);
2957
2958 kiblnd_data.kib_peer_hash_size = IBLND_PEER_HASH_SIZE;
2959 LIBCFS_ALLOC(kiblnd_data.kib_peers,
2960 sizeof(struct list_head) *
2961 kiblnd_data.kib_peer_hash_size);
2962 if (kiblnd_data.kib_peers == NULL) {
2963 goto failed;
2964 }
2965 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++)
2966 INIT_LIST_HEAD(&kiblnd_data.kib_peers[i]);
2967
2968 spin_lock_init(&kiblnd_data.kib_connd_lock);
2969 INIT_LIST_HEAD(&kiblnd_data.kib_connd_conns);
2970 INIT_LIST_HEAD(&kiblnd_data.kib_connd_zombies);
2971 init_waitqueue_head(&kiblnd_data.kib_connd_waitq);
2972 init_waitqueue_head(&kiblnd_data.kib_failover_waitq);
2973
2974 kiblnd_data.kib_scheds = cfs_percpt_alloc(lnet_cpt_table(),
2975 sizeof(*sched));
2976 if (kiblnd_data.kib_scheds == NULL)
2977 goto failed;
2978
2979 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
2980 int nthrs;
2981
2982 spin_lock_init(&sched->ibs_lock);
2983 INIT_LIST_HEAD(&sched->ibs_conns);
2984 init_waitqueue_head(&sched->ibs_waitq);
2985
2986 nthrs = cfs_cpt_weight(lnet_cpt_table(), i);
2987 if (*kiblnd_tunables.kib_nscheds > 0) {
2988 nthrs = min(nthrs, *kiblnd_tunables.kib_nscheds);
2989 } else {
2990
2991
2992 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
2993 }
2994
2995 sched->ibs_nthreads_max = nthrs;
2996 sched->ibs_cpt = i;
2997 }
2998
2999 kiblnd_data.kib_error_qpa.qp_state = IB_QPS_ERR;
3000
3001
3002 kiblnd_data.kib_init = IBLND_INIT_DATA;
3003
3004
3005 rc = kiblnd_thread_start(kiblnd_connd, NULL, "kiblnd_connd");
3006 if (rc != 0) {
3007 CERROR("Can't spawn o2iblnd connd: %d\n", rc);
3008 goto failed;
3009 }
3010
3011 if (*kiblnd_tunables.kib_dev_failover != 0)
3012 rc = kiblnd_thread_start(kiblnd_failover_thread, NULL,
3013 "kiblnd_failover");
3014
3015 if (rc != 0) {
3016 CERROR("Can't spawn o2iblnd failover thread: %d\n", rc);
3017 goto failed;
3018 }
3019
3020
3021 kiblnd_data.kib_init = IBLND_INIT_ALL;
3022
3023
3024 return 0;
3025
3026 failed:
3027 kiblnd_base_shutdown();
3028 return -ENETDOWN;
3029}
3030
3031int
3032kiblnd_start_schedulers(struct kib_sched_info *sched)
3033{
3034 int rc = 0;
3035 int nthrs;
3036 int i;
3037
3038 if (sched->ibs_nthreads == 0) {
3039 if (*kiblnd_tunables.kib_nscheds > 0) {
3040 nthrs = sched->ibs_nthreads_max;
3041 } else {
3042 nthrs = cfs_cpt_weight(lnet_cpt_table(),
3043 sched->ibs_cpt);
3044 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
3045 nthrs = min(IBLND_N_SCHED_HIGH, nthrs);
3046 }
3047 } else {
3048 LASSERT(sched->ibs_nthreads <= sched->ibs_nthreads_max);
3049
3050 nthrs = (sched->ibs_nthreads < sched->ibs_nthreads_max);
3051 }
3052
3053 for (i = 0; i < nthrs; i++) {
3054 long id;
3055 char name[20];
3056 id = KIB_THREAD_ID(sched->ibs_cpt, sched->ibs_nthreads + i);
3057 snprintf(name, sizeof(name), "kiblnd_sd_%02ld_%02ld",
3058 KIB_THREAD_CPT(id), KIB_THREAD_TID(id));
3059 rc = kiblnd_thread_start(kiblnd_scheduler, (void *)id, name);
3060 if (rc == 0)
3061 continue;
3062
3063 CERROR("Can't spawn thread %d for scheduler[%d]: %d\n",
3064 sched->ibs_cpt, sched->ibs_nthreads + i, rc);
3065 break;
3066 }
3067
3068 sched->ibs_nthreads += i;
3069 return rc;
3070}
3071
3072int
3073kiblnd_dev_start_threads(kib_dev_t *dev, int newdev, __u32 *cpts, int ncpts)
3074{
3075 int cpt;
3076 int rc;
3077 int i;
3078
3079 for (i = 0; i < ncpts; i++) {
3080 struct kib_sched_info *sched;
3081
3082 cpt = (cpts == NULL) ? i : cpts[i];
3083 sched = kiblnd_data.kib_scheds[cpt];
3084
3085 if (!newdev && sched->ibs_nthreads > 0)
3086 continue;
3087
3088 rc = kiblnd_start_schedulers(kiblnd_data.kib_scheds[cpt]);
3089 if (rc != 0) {
3090 CERROR("Failed to start scheduler threads for %s\n",
3091 dev->ibd_ifname);
3092 return rc;
3093 }
3094 }
3095 return 0;
3096}
3097
3098kib_dev_t *
3099kiblnd_dev_search(char *ifname)
3100{
3101 kib_dev_t *alias = NULL;
3102 kib_dev_t *dev;
3103 char *colon;
3104 char *colon2;
3105
3106 colon = strchr(ifname, ':');
3107 list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) {
3108 if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
3109 return dev;
3110
3111 if (alias != NULL)
3112 continue;
3113
3114 colon2 = strchr(dev->ibd_ifname, ':');
3115 if (colon != NULL)
3116 *colon = 0;
3117 if (colon2 != NULL)
3118 *colon2 = 0;
3119
3120 if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
3121 alias = dev;
3122
3123 if (colon != NULL)
3124 *colon = ':';
3125 if (colon2 != NULL)
3126 *colon2 = ':';
3127 }
3128 return alias;
3129}
3130
3131int
3132kiblnd_startup (lnet_ni_t *ni)
3133{
3134 char *ifname;
3135 kib_dev_t *ibdev = NULL;
3136 kib_net_t *net;
3137 struct timeval tv;
3138 unsigned long flags;
3139 int rc;
3140 int newdev;
3141
3142 LASSERT (ni->ni_lnd == &the_o2iblnd);
3143
3144 if (kiblnd_data.kib_init == IBLND_INIT_NOTHING) {
3145 rc = kiblnd_base_startup();
3146 if (rc != 0)
3147 return rc;
3148 }
3149
3150 LIBCFS_ALLOC(net, sizeof(*net));
3151 ni->ni_data = net;
3152 if (net == NULL)
3153 goto failed;
3154
3155 memset(net, 0, sizeof(*net));
3156
3157 do_gettimeofday(&tv);
3158 net->ibn_incarnation = (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
3159
3160 ni->ni_peertimeout = *kiblnd_tunables.kib_peertimeout;
3161 ni->ni_maxtxcredits = *kiblnd_tunables.kib_credits;
3162 ni->ni_peertxcredits = *kiblnd_tunables.kib_peertxcredits;
3163 ni->ni_peerrtrcredits = *kiblnd_tunables.kib_peerrtrcredits;
3164
3165 if (ni->ni_interfaces[0] != NULL) {
3166
3167
3168 CLASSERT (LNET_MAX_INTERFACES > 1);
3169 if (ni->ni_interfaces[1] != NULL) {
3170 CERROR("Multiple interfaces not supported\n");
3171 goto failed;
3172 }
3173
3174 ifname = ni->ni_interfaces[0];
3175 } else {
3176 ifname = *kiblnd_tunables.kib_default_ipif;
3177 }
3178
3179 if (strlen(ifname) >= sizeof(ibdev->ibd_ifname)) {
3180 CERROR("IPoIB interface name too long: %s\n", ifname);
3181 goto failed;
3182 }
3183
3184 ibdev = kiblnd_dev_search(ifname);
3185
3186 newdev = ibdev == NULL;
3187
3188 if (ibdev == NULL || strcmp(&ibdev->ibd_ifname[0], ifname) != 0)
3189 ibdev = kiblnd_create_dev(ifname);
3190
3191 if (ibdev == NULL)
3192 goto failed;
3193
3194 net->ibn_dev = ibdev;
3195 ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid), ibdev->ibd_ifip);
3196
3197 rc = kiblnd_dev_start_threads(ibdev, newdev,
3198 ni->ni_cpts, ni->ni_ncpts);
3199 if (rc != 0)
3200 goto failed;
3201
3202 rc = kiblnd_net_init_pools(net, ni->ni_cpts, ni->ni_ncpts);
3203 if (rc != 0) {
3204 CERROR("Failed to initialize NI pools: %d\n", rc);
3205 goto failed;
3206 }
3207
3208 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
3209 ibdev->ibd_nnets++;
3210 list_add_tail(&net->ibn_list, &ibdev->ibd_nets);
3211 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
3212
3213 net->ibn_init = IBLND_INIT_ALL;
3214
3215 return 0;
3216
3217failed:
3218 if (net->ibn_dev == NULL && ibdev != NULL)
3219 kiblnd_destroy_dev(ibdev);
3220
3221 kiblnd_shutdown(ni);
3222
3223 CDEBUG(D_NET, "kiblnd_startup failed\n");
3224 return -ENETDOWN;
3225}
3226
3227void __exit
3228kiblnd_module_fini (void)
3229{
3230 lnet_unregister_lnd(&the_o2iblnd);
3231 kiblnd_tunables_fini();
3232}
3233
3234int __init
3235kiblnd_module_init (void)
3236{
3237 int rc;
3238
3239 CLASSERT (sizeof(kib_msg_t) <= IBLND_MSG_SIZE);
3240 CLASSERT (offsetof(kib_msg_t, ibm_u.get.ibgm_rd.rd_frags[IBLND_MAX_RDMA_FRAGS])
3241 <= IBLND_MSG_SIZE);
3242 CLASSERT (offsetof(kib_msg_t, ibm_u.putack.ibpam_rd.rd_frags[IBLND_MAX_RDMA_FRAGS])
3243 <= IBLND_MSG_SIZE);
3244
3245 rc = kiblnd_tunables_init();
3246 if (rc != 0)
3247 return rc;
3248
3249 lnet_register_lnd(&the_o2iblnd);
3250
3251 return 0;
3252}
3253
3254MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
3255MODULE_DESCRIPTION("Kernel OpenIB gen2 LND v2.00");
3256MODULE_LICENSE("GPL");
3257
3258module_init(kiblnd_module_init);
3259module_exit(kiblnd_module_fini);
3260
