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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 if (mask == NULL)
706 return 0;
707
708
709 off = do_div(nid, cpus_weight(*mask));
710 for_each_cpu_mask(i, *mask) {
711 if (off-- == 0)
712 return i % vectors;
713 }
714
715 LBUG();
716 return 1;
717}
718
719kib_conn_t *
720kiblnd_create_conn(kib_peer_t *peer, struct rdma_cm_id *cmid,
721 int state, int version)
722{
723
724
725
726
727
728
729
730 rwlock_t *glock = &kiblnd_data.kib_global_lock;
731 kib_net_t *net = peer->ibp_ni->ni_data;
732 kib_dev_t *dev;
733 struct ib_qp_init_attr *init_qp_attr;
734 struct kib_sched_info *sched;
735 kib_conn_t *conn;
736 struct ib_cq *cq;
737 unsigned long flags;
738 int cpt;
739 int rc;
740 int i;
741
742 LASSERT(net != NULL);
743 LASSERT(!in_interrupt());
744
745 dev = net->ibn_dev;
746
747 cpt = lnet_cpt_of_nid(peer->ibp_nid);
748 sched = kiblnd_data.kib_scheds[cpt];
749
750 LASSERT(sched->ibs_nthreads > 0);
751
752 LIBCFS_CPT_ALLOC(init_qp_attr, lnet_cpt_table(), cpt,
753 sizeof(*init_qp_attr));
754 if (init_qp_attr == NULL) {
755 CERROR("Can't allocate qp_attr for %s\n",
756 libcfs_nid2str(peer->ibp_nid));
757 goto failed_0;
758 }
759
760 LIBCFS_CPT_ALLOC(conn, lnet_cpt_table(), cpt, sizeof(*conn));
761 if (conn == NULL) {
762 CERROR("Can't allocate connection for %s\n",
763 libcfs_nid2str(peer->ibp_nid));
764 goto failed_1;
765 }
766
767 conn->ibc_state = IBLND_CONN_INIT;
768 conn->ibc_version = version;
769 conn->ibc_peer = peer;
770 cmid->context = conn;
771 conn->ibc_cmid = cmid;
772
773 INIT_LIST_HEAD(&conn->ibc_early_rxs);
774 INIT_LIST_HEAD(&conn->ibc_tx_noops);
775 INIT_LIST_HEAD(&conn->ibc_tx_queue);
776 INIT_LIST_HEAD(&conn->ibc_tx_queue_rsrvd);
777 INIT_LIST_HEAD(&conn->ibc_tx_queue_nocred);
778 INIT_LIST_HEAD(&conn->ibc_active_txs);
779 spin_lock_init(&conn->ibc_lock);
780
781 LIBCFS_CPT_ALLOC(conn->ibc_connvars, lnet_cpt_table(), cpt,
782 sizeof(*conn->ibc_connvars));
783 if (conn->ibc_connvars == NULL) {
784 CERROR("Can't allocate in-progress connection state\n");
785 goto failed_2;
786 }
787
788 write_lock_irqsave(glock, flags);
789 if (dev->ibd_failover) {
790 write_unlock_irqrestore(glock, flags);
791 CERROR("%s: failover in progress\n", dev->ibd_ifname);
792 goto failed_2;
793 }
794
795 if (dev->ibd_hdev->ibh_ibdev != cmid->device) {
796
797 if (kiblnd_dev_can_failover(dev)) {
798 list_add_tail(&dev->ibd_fail_list,
799 &kiblnd_data.kib_failed_devs);
800 wake_up(&kiblnd_data.kib_failover_waitq);
801 }
802
803 write_unlock_irqrestore(glock, flags);
804 CERROR("cmid HCA(%s), kib_dev(%s) need failover\n",
805 cmid->device->name, dev->ibd_ifname);
806 goto failed_2;
807 }
808
809 kiblnd_hdev_addref_locked(dev->ibd_hdev);
810 conn->ibc_hdev = dev->ibd_hdev;
811
812 kiblnd_setup_mtu_locked(cmid);
813
814 write_unlock_irqrestore(glock, flags);
815
816 LIBCFS_CPT_ALLOC(conn->ibc_rxs, lnet_cpt_table(), cpt,
817 IBLND_RX_MSGS(version) * sizeof(kib_rx_t));
818 if (conn->ibc_rxs == NULL) {
819 CERROR("Cannot allocate RX buffers\n");
820 goto failed_2;
821 }
822
823 rc = kiblnd_alloc_pages(&conn->ibc_rx_pages, cpt,
824 IBLND_RX_MSG_PAGES(version));
825 if (rc != 0)
826 goto failed_2;
827
828 kiblnd_map_rx_descs(conn);
829
830 cq = ib_create_cq(cmid->device,
831 kiblnd_cq_completion, kiblnd_cq_event, conn,
832 IBLND_CQ_ENTRIES(version),
833 kiblnd_get_completion_vector(conn, cpt));
834 if (IS_ERR(cq)) {
835 CERROR("Can't create CQ: %ld, cqe: %d\n",
836 PTR_ERR(cq), IBLND_CQ_ENTRIES(version));
837 goto failed_2;
838 }
839
840 conn->ibc_cq = cq;
841
842 rc = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
843 if (rc != 0) {
844 CERROR("Can't request completion notificiation: %d\n", rc);
845 goto failed_2;
846 }
847
848 init_qp_attr->event_handler = kiblnd_qp_event;
849 init_qp_attr->qp_context = conn;
850 init_qp_attr->cap.max_send_wr = IBLND_SEND_WRS(version);
851 init_qp_attr->cap.max_recv_wr = IBLND_RECV_WRS(version);
852 init_qp_attr->cap.max_send_sge = 1;
853 init_qp_attr->cap.max_recv_sge = 1;
854 init_qp_attr->sq_sig_type = IB_SIGNAL_REQ_WR;
855 init_qp_attr->qp_type = IB_QPT_RC;
856 init_qp_attr->send_cq = cq;
857 init_qp_attr->recv_cq = cq;
858
859 conn->ibc_sched = sched;
860
861 rc = rdma_create_qp(cmid, conn->ibc_hdev->ibh_pd, init_qp_attr);
862 if (rc != 0) {
863 CERROR("Can't create QP: %d, send_wr: %d, recv_wr: %d\n",
864 rc, init_qp_attr->cap.max_send_wr,
865 init_qp_attr->cap.max_recv_wr);
866 goto failed_2;
867 }
868
869 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
870
871
872 atomic_set(&conn->ibc_refcount, 1 + IBLND_RX_MSGS(version));
873 conn->ibc_nrx = IBLND_RX_MSGS(version);
874
875
876 for (i = 0; i < IBLND_RX_MSGS(version); i++) {
877 rc = kiblnd_post_rx(&conn->ibc_rxs[i],
878 IBLND_POSTRX_NO_CREDIT);
879 if (rc != 0) {
880 CERROR("Can't post rxmsg: %d\n", rc);
881
882
883 kiblnd_abort_receives(conn);
884
885
886
887 spin_lock_irqsave(&sched->ibs_lock, flags);
888 conn->ibc_nrx -= IBLND_RX_MSGS(version) - i;
889 spin_unlock_irqrestore(&sched->ibs_lock, flags);
890
891
892
893
894 rdma_destroy_qp(conn->ibc_cmid);
895 conn->ibc_cmid = NULL;
896
897
898 while (i++ <= IBLND_RX_MSGS(version))
899 kiblnd_conn_decref(conn);
900
901 return NULL;
902 }
903 }
904
905
906 LASSERT (state == IBLND_CONN_ACTIVE_CONNECT ||
907 state == IBLND_CONN_PASSIVE_WAIT);
908 conn->ibc_state = state;
909
910
911 atomic_inc(&net->ibn_nconns);
912 return conn;
913
914 failed_2:
915 kiblnd_destroy_conn(conn);
916 failed_1:
917 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
918 failed_0:
919 return NULL;
920}
921
922void
923kiblnd_destroy_conn (kib_conn_t *conn)
924{
925 struct rdma_cm_id *cmid = conn->ibc_cmid;
926 kib_peer_t *peer = conn->ibc_peer;
927 int rc;
928
929 LASSERT (!in_interrupt());
930 LASSERT (atomic_read(&conn->ibc_refcount) == 0);
931 LASSERT (list_empty(&conn->ibc_early_rxs));
932 LASSERT (list_empty(&conn->ibc_tx_noops));
933 LASSERT (list_empty(&conn->ibc_tx_queue));
934 LASSERT (list_empty(&conn->ibc_tx_queue_rsrvd));
935 LASSERT (list_empty(&conn->ibc_tx_queue_nocred));
936 LASSERT (list_empty(&conn->ibc_active_txs));
937 LASSERT (conn->ibc_noops_posted == 0);
938 LASSERT (conn->ibc_nsends_posted == 0);
939
940 switch (conn->ibc_state) {
941 default:
942
943 LBUG();
944
945 case IBLND_CONN_DISCONNECTED:
946
947 LASSERT (conn->ibc_connvars == NULL);
948 break;
949
950 case IBLND_CONN_INIT:
951 break;
952 }
953
954
955 if (cmid != NULL && cmid->qp != NULL)
956 rdma_destroy_qp(cmid);
957
958 if (conn->ibc_cq != NULL) {
959 rc = ib_destroy_cq(conn->ibc_cq);
960 if (rc != 0)
961 CWARN("Error destroying CQ: %d\n", rc);
962 }
963
964 if (conn->ibc_rx_pages != NULL)
965 kiblnd_unmap_rx_descs(conn);
966
967 if (conn->ibc_rxs != NULL) {
968 LIBCFS_FREE(conn->ibc_rxs,
969 IBLND_RX_MSGS(conn->ibc_version) * sizeof(kib_rx_t));
970 }
971
972 if (conn->ibc_connvars != NULL)
973 LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
974
975 if (conn->ibc_hdev != NULL)
976 kiblnd_hdev_decref(conn->ibc_hdev);
977
978
979 if (conn->ibc_state != IBLND_CONN_INIT) {
980 kib_net_t *net = peer->ibp_ni->ni_data;
981
982 kiblnd_peer_decref(peer);
983 rdma_destroy_id(cmid);
984 atomic_dec(&net->ibn_nconns);
985 }
986
987 LIBCFS_FREE(conn, sizeof(*conn));
988}
989
990int
991kiblnd_close_peer_conns_locked (kib_peer_t *peer, int why)
992{
993 kib_conn_t *conn;
994 struct list_head *ctmp;
995 struct list_head *cnxt;
996 int count = 0;
997
998 list_for_each_safe (ctmp, cnxt, &peer->ibp_conns) {
999 conn = list_entry(ctmp, kib_conn_t, ibc_list);
1000
1001 CDEBUG(D_NET, "Closing conn -> %s, "
1002 "version: %x, reason: %d\n",
1003 libcfs_nid2str(peer->ibp_nid),
1004 conn->ibc_version, why);
1005
1006 kiblnd_close_conn_locked(conn, why);
1007 count++;
1008 }
1009
1010 return count;
1011}
1012
1013int
1014kiblnd_close_stale_conns_locked (kib_peer_t *peer,
1015 int version, __u64 incarnation)
1016{
1017 kib_conn_t *conn;
1018 struct list_head *ctmp;
1019 struct list_head *cnxt;
1020 int count = 0;
1021
1022 list_for_each_safe (ctmp, cnxt, &peer->ibp_conns) {
1023 conn = list_entry(ctmp, kib_conn_t, ibc_list);
1024
1025 if (conn->ibc_version == version &&
1026 conn->ibc_incarnation == incarnation)
1027 continue;
1028
1029 CDEBUG(D_NET, "Closing stale conn -> %s version: %x, "
1030 "incarnation:"LPX64"(%x, "LPX64")\n",
1031 libcfs_nid2str(peer->ibp_nid),
1032 conn->ibc_version, conn->ibc_incarnation,
1033 version, incarnation);
1034
1035 kiblnd_close_conn_locked(conn, -ESTALE);
1036 count++;
1037 }
1038
1039 return count;
1040}
1041
1042int
1043kiblnd_close_matching_conns (lnet_ni_t *ni, lnet_nid_t nid)
1044{
1045 kib_peer_t *peer;
1046 struct list_head *ptmp;
1047 struct list_head *pnxt;
1048 int lo;
1049 int hi;
1050 int i;
1051 unsigned long flags;
1052 int count = 0;
1053
1054 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1055
1056 if (nid != LNET_NID_ANY)
1057 lo = hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
1058 else {
1059 lo = 0;
1060 hi = kiblnd_data.kib_peer_hash_size - 1;
1061 }
1062
1063 for (i = lo; i <= hi; i++) {
1064 list_for_each_safe (ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
1065
1066 peer = list_entry(ptmp, kib_peer_t, ibp_list);
1067 LASSERT (peer->ibp_connecting > 0 ||
1068 peer->ibp_accepting > 0 ||
1069 !list_empty(&peer->ibp_conns));
1070
1071 if (peer->ibp_ni != ni)
1072 continue;
1073
1074 if (!(nid == LNET_NID_ANY || nid == peer->ibp_nid))
1075 continue;
1076
1077 count += kiblnd_close_peer_conns_locked(peer, 0);
1078 }
1079 }
1080
1081 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1082
1083
1084 if (nid == LNET_NID_ANY)
1085 return 0;
1086
1087 return (count == 0) ? -ENOENT : 0;
1088}
1089
1090int
1091kiblnd_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg)
1092{
1093 struct libcfs_ioctl_data *data = arg;
1094 int rc = -EINVAL;
1095
1096 switch(cmd) {
1097 case IOC_LIBCFS_GET_PEER: {
1098 lnet_nid_t nid = 0;
1099 int count = 0;
1100
1101 rc = kiblnd_get_peer_info(ni, data->ioc_count,
1102 &nid, &count);
1103 data->ioc_nid = nid;
1104 data->ioc_count = count;
1105 break;
1106 }
1107
1108 case IOC_LIBCFS_DEL_PEER: {
1109 rc = kiblnd_del_peer(ni, data->ioc_nid);
1110 break;
1111 }
1112 case IOC_LIBCFS_GET_CONN: {
1113 kib_conn_t *conn;
1114
1115 rc = 0;
1116 conn = kiblnd_get_conn_by_idx(ni, data->ioc_count);
1117 if (conn == NULL) {
1118 rc = -ENOENT;
1119 break;
1120 }
1121
1122 LASSERT (conn->ibc_cmid != NULL);
1123 data->ioc_nid = conn->ibc_peer->ibp_nid;
1124 if (conn->ibc_cmid->route.path_rec == NULL)
1125 data->ioc_u32[0] = 0;
1126 else
1127 data->ioc_u32[0] =
1128 ib_mtu_enum_to_int(conn->ibc_cmid->route.path_rec->mtu);
1129 kiblnd_conn_decref(conn);
1130 break;
1131 }
1132 case IOC_LIBCFS_CLOSE_CONNECTION: {
1133 rc = kiblnd_close_matching_conns(ni, data->ioc_nid);
1134 break;
1135 }
1136
1137 default:
1138 break;
1139 }
1140
1141 return rc;
1142}
1143
1144void
1145kiblnd_query (lnet_ni_t *ni, lnet_nid_t nid, cfs_time_t *when)
1146{
1147 cfs_time_t last_alive = 0;
1148 cfs_time_t now = cfs_time_current();
1149 rwlock_t *glock = &kiblnd_data.kib_global_lock;
1150 kib_peer_t *peer;
1151 unsigned long flags;
1152
1153 read_lock_irqsave(glock, flags);
1154
1155 peer = kiblnd_find_peer_locked(nid);
1156 if (peer != NULL) {
1157 LASSERT (peer->ibp_connecting > 0 ||
1158 peer->ibp_accepting > 0 ||
1159 !list_empty(&peer->ibp_conns));
1160 last_alive = peer->ibp_last_alive;
1161 }
1162
1163 read_unlock_irqrestore(glock, flags);
1164
1165 if (last_alive != 0)
1166 *when = last_alive;
1167
1168
1169
1170 if (peer == NULL)
1171 kiblnd_launch_tx(ni, NULL, nid);
1172
1173 CDEBUG(D_NET, "Peer %s %p, alive %ld secs ago\n",
1174 libcfs_nid2str(nid), peer,
1175 last_alive ? cfs_duration_sec(now - last_alive) : -1);
1176 return;
1177}
1178
1179void
1180kiblnd_free_pages(kib_pages_t *p)
1181{
1182 int npages = p->ibp_npages;
1183 int i;
1184
1185 for (i = 0; i < npages; i++) {
1186 if (p->ibp_pages[i] != NULL)
1187 __free_page(p->ibp_pages[i]);
1188 }
1189
1190 LIBCFS_FREE(p, offsetof(kib_pages_t, ibp_pages[npages]));
1191}
1192
1193int
1194kiblnd_alloc_pages(kib_pages_t **pp, int cpt, int npages)
1195{
1196 kib_pages_t *p;
1197 int i;
1198
1199 LIBCFS_CPT_ALLOC(p, lnet_cpt_table(), cpt,
1200 offsetof(kib_pages_t, ibp_pages[npages]));
1201 if (p == NULL) {
1202 CERROR("Can't allocate descriptor for %d pages\n", npages);
1203 return -ENOMEM;
1204 }
1205
1206 memset(p, 0, offsetof(kib_pages_t, ibp_pages[npages]));
1207 p->ibp_npages = npages;
1208
1209 for (i = 0; i < npages; i++) {
1210 p->ibp_pages[i] = alloc_pages_node(
1211 cfs_cpt_spread_node(lnet_cpt_table(), cpt),
1212 __GFP_IO, 0);
1213 if (p->ibp_pages[i] == NULL) {
1214 CERROR("Can't allocate page %d of %d\n", i, npages);
1215 kiblnd_free_pages(p);
1216 return -ENOMEM;
1217 }
1218 }
1219
1220 *pp = p;
1221 return 0;
1222}
1223
1224void
1225kiblnd_unmap_rx_descs(kib_conn_t *conn)
1226{
1227 kib_rx_t *rx;
1228 int i;
1229
1230 LASSERT (conn->ibc_rxs != NULL);
1231 LASSERT (conn->ibc_hdev != NULL);
1232
1233 for (i = 0; i < IBLND_RX_MSGS(conn->ibc_version); i++) {
1234 rx = &conn->ibc_rxs[i];
1235
1236 LASSERT (rx->rx_nob >= 0);
1237
1238 kiblnd_dma_unmap_single(conn->ibc_hdev->ibh_ibdev,
1239 KIBLND_UNMAP_ADDR(rx, rx_msgunmap,
1240 rx->rx_msgaddr),
1241 IBLND_MSG_SIZE, DMA_FROM_DEVICE);
1242 }
1243
1244 kiblnd_free_pages(conn->ibc_rx_pages);
1245
1246 conn->ibc_rx_pages = NULL;
1247}
1248
1249void
1250kiblnd_map_rx_descs(kib_conn_t *conn)
1251{
1252 kib_rx_t *rx;
1253 struct page *pg;
1254 int pg_off;
1255 int ipg;
1256 int i;
1257
1258 for (pg_off = ipg = i = 0;
1259 i < IBLND_RX_MSGS(conn->ibc_version); i++) {
1260 pg = conn->ibc_rx_pages->ibp_pages[ipg];
1261 rx = &conn->ibc_rxs[i];
1262
1263 rx->rx_conn = conn;
1264 rx->rx_msg = (kib_msg_t *)(((char *)page_address(pg)) + pg_off);
1265
1266 rx->rx_msgaddr = kiblnd_dma_map_single(conn->ibc_hdev->ibh_ibdev,
1267 rx->rx_msg, IBLND_MSG_SIZE,
1268 DMA_FROM_DEVICE);
1269 LASSERT (!kiblnd_dma_mapping_error(conn->ibc_hdev->ibh_ibdev,
1270 rx->rx_msgaddr));
1271 KIBLND_UNMAP_ADDR_SET(rx, rx_msgunmap, rx->rx_msgaddr);
1272
1273 CDEBUG(D_NET,"rx %d: %p "LPX64"("LPX64")\n",
1274 i, rx->rx_msg, rx->rx_msgaddr,
1275 lnet_page2phys(pg) + pg_off);
1276
1277 pg_off += IBLND_MSG_SIZE;
1278 LASSERT (pg_off <= PAGE_SIZE);
1279
1280 if (pg_off == PAGE_SIZE) {
1281 pg_off = 0;
1282 ipg++;
1283 LASSERT (ipg <= IBLND_RX_MSG_PAGES(conn->ibc_version));
1284 }
1285 }
1286}
1287
1288static void
1289kiblnd_unmap_tx_pool(kib_tx_pool_t *tpo)
1290{
1291 kib_hca_dev_t *hdev = tpo->tpo_hdev;
1292 kib_tx_t *tx;
1293 int i;
1294
1295 LASSERT (tpo->tpo_pool.po_allocated == 0);
1296
1297 if (hdev == NULL)
1298 return;
1299
1300 for (i = 0; i < tpo->tpo_pool.po_size; i++) {
1301 tx = &tpo->tpo_tx_descs[i];
1302 kiblnd_dma_unmap_single(hdev->ibh_ibdev,
1303 KIBLND_UNMAP_ADDR(tx, tx_msgunmap,
1304 tx->tx_msgaddr),
1305 IBLND_MSG_SIZE, DMA_TO_DEVICE);
1306 }
1307
1308 kiblnd_hdev_decref(hdev);
1309 tpo->tpo_hdev = NULL;
1310}
1311
1312static kib_hca_dev_t *
1313kiblnd_current_hdev(kib_dev_t *dev)
1314{
1315 kib_hca_dev_t *hdev;
1316 unsigned long flags;
1317 int i = 0;
1318
1319 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1320 while (dev->ibd_failover) {
1321 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1322 if (i++ % 50 == 0)
1323 CDEBUG(D_NET, "%s: Wait for failover\n",
1324 dev->ibd_ifname);
1325 schedule_timeout(cfs_time_seconds(1) / 100);
1326
1327 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1328 }
1329
1330 kiblnd_hdev_addref_locked(dev->ibd_hdev);
1331 hdev = dev->ibd_hdev;
1332
1333 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1334
1335 return hdev;
1336}
1337
1338static void
1339kiblnd_map_tx_pool(kib_tx_pool_t *tpo)
1340{
1341 kib_pages_t *txpgs = tpo->tpo_tx_pages;
1342 kib_pool_t *pool = &tpo->tpo_pool;
1343 kib_net_t *net = pool->po_owner->ps_net;
1344 kib_dev_t *dev;
1345 struct page *page;
1346 kib_tx_t *tx;
1347 int page_offset;
1348 int ipage;
1349 int i;
1350
1351 LASSERT (net != NULL);
1352
1353 dev = net->ibn_dev;
1354
1355
1356 CLASSERT (IBLND_MSG_SIZE <= PAGE_SIZE);
1357
1358
1359 CLASSERT (PAGE_SIZE % IBLND_MSG_SIZE == 0);
1360
1361 tpo->tpo_hdev = kiblnd_current_hdev(dev);
1362
1363 for (ipage = page_offset = i = 0; i < pool->po_size; i++) {
1364 page = txpgs->ibp_pages[ipage];
1365 tx = &tpo->tpo_tx_descs[i];
1366
1367 tx->tx_msg = (kib_msg_t *)(((char *)page_address(page)) +
1368 page_offset);
1369
1370 tx->tx_msgaddr = kiblnd_dma_map_single(
1371 tpo->tpo_hdev->ibh_ibdev, tx->tx_msg,
1372 IBLND_MSG_SIZE, DMA_TO_DEVICE);
1373 LASSERT (!kiblnd_dma_mapping_error(tpo->tpo_hdev->ibh_ibdev,
1374 tx->tx_msgaddr));
1375 KIBLND_UNMAP_ADDR_SET(tx, tx_msgunmap, tx->tx_msgaddr);
1376
1377 list_add(&tx->tx_list, &pool->po_free_list);
1378
1379 page_offset += IBLND_MSG_SIZE;
1380 LASSERT (page_offset <= PAGE_SIZE);
1381
1382 if (page_offset == PAGE_SIZE) {
1383 page_offset = 0;
1384 ipage++;
1385 LASSERT (ipage <= txpgs->ibp_npages);
1386 }
1387 }
1388}
1389
1390struct ib_mr *
1391kiblnd_find_dma_mr(kib_hca_dev_t *hdev, __u64 addr, __u64 size)
1392{
1393 __u64 index;
1394
1395 LASSERT (hdev->ibh_mrs[0] != NULL);
1396
1397 if (hdev->ibh_nmrs == 1)
1398 return hdev->ibh_mrs[0];
1399
1400 index = addr >> hdev->ibh_mr_shift;
1401
1402 if (index < hdev->ibh_nmrs &&
1403 index == ((addr + size - 1) >> hdev->ibh_mr_shift))
1404 return hdev->ibh_mrs[index];
1405
1406 return NULL;
1407}
1408
1409struct ib_mr *
1410kiblnd_find_rd_dma_mr(kib_hca_dev_t *hdev, kib_rdma_desc_t *rd)
1411{
1412 struct ib_mr *prev_mr;
1413 struct ib_mr *mr;
1414 int i;
1415
1416 LASSERT (hdev->ibh_mrs[0] != NULL);
1417
1418 if (*kiblnd_tunables.kib_map_on_demand > 0 &&
1419 *kiblnd_tunables.kib_map_on_demand <= rd->rd_nfrags)
1420 return NULL;
1421
1422 if (hdev->ibh_nmrs == 1)
1423 return hdev->ibh_mrs[0];
1424
1425 for (i = 0, mr = prev_mr = NULL;
1426 i < rd->rd_nfrags; i++) {
1427 mr = kiblnd_find_dma_mr(hdev,
1428 rd->rd_frags[i].rf_addr,
1429 rd->rd_frags[i].rf_nob);
1430 if (prev_mr == NULL)
1431 prev_mr = mr;
1432
1433 if (mr == NULL || prev_mr != mr) {
1434
1435 mr = NULL;
1436 break;
1437 }
1438 }
1439
1440 return mr;
1441}
1442
1443void
1444kiblnd_destroy_fmr_pool(kib_fmr_pool_t *pool)
1445{
1446 LASSERT (pool->fpo_map_count == 0);
1447
1448 if (pool->fpo_fmr_pool != NULL)
1449 ib_destroy_fmr_pool(pool->fpo_fmr_pool);
1450
1451 if (pool->fpo_hdev != NULL)
1452 kiblnd_hdev_decref(pool->fpo_hdev);
1453
1454 LIBCFS_FREE(pool, sizeof(kib_fmr_pool_t));
1455}
1456
1457void
1458kiblnd_destroy_fmr_pool_list(struct list_head *head)
1459{
1460 kib_fmr_pool_t *pool;
1461
1462 while (!list_empty(head)) {
1463 pool = list_entry(head->next, kib_fmr_pool_t, fpo_list);
1464 list_del(&pool->fpo_list);
1465 kiblnd_destroy_fmr_pool(pool);
1466 }
1467}
1468
1469static int kiblnd_fmr_pool_size(int ncpts)
1470{
1471 int size = *kiblnd_tunables.kib_fmr_pool_size / ncpts;
1472
1473 return max(IBLND_FMR_POOL, size);
1474}
1475
1476static int kiblnd_fmr_flush_trigger(int ncpts)
1477{
1478 int size = *kiblnd_tunables.kib_fmr_flush_trigger / ncpts;
1479
1480 return max(IBLND_FMR_POOL_FLUSH, size);
1481}
1482
1483int
1484kiblnd_create_fmr_pool(kib_fmr_poolset_t *fps, kib_fmr_pool_t **pp_fpo)
1485{
1486
1487 kib_dev_t *dev = fps->fps_net->ibn_dev;
1488 kib_fmr_pool_t *fpo;
1489 struct ib_fmr_pool_param param = {
1490 .max_pages_per_fmr = LNET_MAX_PAYLOAD/PAGE_SIZE,
1491 .page_shift = PAGE_SHIFT,
1492 .access = (IB_ACCESS_LOCAL_WRITE |
1493 IB_ACCESS_REMOTE_WRITE),
1494 .pool_size = fps->fps_pool_size,
1495 .dirty_watermark = fps->fps_flush_trigger,
1496 .flush_function = NULL,
1497 .flush_arg = NULL,
1498 .cache = !!*kiblnd_tunables.kib_fmr_cache};
1499 int rc;
1500
1501 LIBCFS_CPT_ALLOC(fpo, lnet_cpt_table(), fps->fps_cpt, sizeof(*fpo));
1502 if (fpo == NULL)
1503 return -ENOMEM;
1504
1505 fpo->fpo_hdev = kiblnd_current_hdev(dev);
1506
1507 fpo->fpo_fmr_pool = ib_create_fmr_pool(fpo->fpo_hdev->ibh_pd, ¶m);
1508 if (IS_ERR(fpo->fpo_fmr_pool)) {
1509 rc = PTR_ERR(fpo->fpo_fmr_pool);
1510 CERROR("Failed to create FMR pool: %d\n", rc);
1511
1512 kiblnd_hdev_decref(fpo->fpo_hdev);
1513 LIBCFS_FREE(fpo, sizeof(kib_fmr_pool_t));
1514 return rc;
1515 }
1516
1517 fpo->fpo_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1518 fpo->fpo_owner = fps;
1519 *pp_fpo = fpo;
1520
1521 return 0;
1522}
1523
1524static void
1525kiblnd_fail_fmr_poolset(kib_fmr_poolset_t *fps, struct list_head *zombies)
1526{
1527 if (fps->fps_net == NULL)
1528 return;
1529
1530 spin_lock(&fps->fps_lock);
1531
1532 while (!list_empty(&fps->fps_pool_list)) {
1533 kib_fmr_pool_t *fpo = list_entry(fps->fps_pool_list.next,
1534 kib_fmr_pool_t, fpo_list);
1535 fpo->fpo_failed = 1;
1536 list_del(&fpo->fpo_list);
1537 if (fpo->fpo_map_count == 0)
1538 list_add(&fpo->fpo_list, zombies);
1539 else
1540 list_add(&fpo->fpo_list, &fps->fps_failed_pool_list);
1541 }
1542
1543 spin_unlock(&fps->fps_lock);
1544}
1545
1546static void
1547kiblnd_fini_fmr_poolset(kib_fmr_poolset_t *fps)
1548{
1549 if (fps->fps_net != NULL) {
1550 kiblnd_destroy_fmr_pool_list(&fps->fps_failed_pool_list);
1551 kiblnd_destroy_fmr_pool_list(&fps->fps_pool_list);
1552 }
1553}
1554
1555static int
1556kiblnd_init_fmr_poolset(kib_fmr_poolset_t *fps, int cpt, kib_net_t *net,
1557 int pool_size, int flush_trigger)
1558{
1559 kib_fmr_pool_t *fpo;
1560 int rc;
1561
1562 memset(fps, 0, sizeof(kib_fmr_poolset_t));
1563
1564 fps->fps_net = net;
1565 fps->fps_cpt = cpt;
1566 fps->fps_pool_size = pool_size;
1567 fps->fps_flush_trigger = flush_trigger;
1568 spin_lock_init(&fps->fps_lock);
1569 INIT_LIST_HEAD(&fps->fps_pool_list);
1570 INIT_LIST_HEAD(&fps->fps_failed_pool_list);
1571
1572 rc = kiblnd_create_fmr_pool(fps, &fpo);
1573 if (rc == 0)
1574 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1575
1576 return rc;
1577}
1578
1579static int
1580kiblnd_fmr_pool_is_idle(kib_fmr_pool_t *fpo, cfs_time_t now)
1581{
1582 if (fpo->fpo_map_count != 0)
1583 return 0;
1584 if (fpo->fpo_failed)
1585 return 1;
1586 return cfs_time_aftereq(now, fpo->fpo_deadline);
1587}
1588
1589void
1590kiblnd_fmr_pool_unmap(kib_fmr_t *fmr, int status)
1591{
1592 LIST_HEAD (zombies);
1593 kib_fmr_pool_t *fpo = fmr->fmr_pool;
1594 kib_fmr_poolset_t *fps = fpo->fpo_owner;
1595 cfs_time_t now = cfs_time_current();
1596 kib_fmr_pool_t *tmp;
1597 int rc;
1598
1599 rc = ib_fmr_pool_unmap(fmr->fmr_pfmr);
1600 LASSERT (rc == 0);
1601
1602 if (status != 0) {
1603 rc = ib_flush_fmr_pool(fpo->fpo_fmr_pool);
1604 LASSERT (rc == 0);
1605 }
1606
1607 fmr->fmr_pool = NULL;
1608 fmr->fmr_pfmr = NULL;
1609
1610 spin_lock(&fps->fps_lock);
1611 fpo->fpo_map_count --;
1612
1613 list_for_each_entry_safe(fpo, tmp, &fps->fps_pool_list, fpo_list) {
1614
1615 if (fps->fps_pool_list.next == &fpo->fpo_list)
1616 continue;
1617
1618 if (kiblnd_fmr_pool_is_idle(fpo, now)) {
1619 list_move(&fpo->fpo_list, &zombies);
1620 fps->fps_version ++;
1621 }
1622 }
1623 spin_unlock(&fps->fps_lock);
1624
1625 if (!list_empty(&zombies))
1626 kiblnd_destroy_fmr_pool_list(&zombies);
1627}
1628
1629int
1630kiblnd_fmr_pool_map(kib_fmr_poolset_t *fps, __u64 *pages, int npages,
1631 __u64 iov, kib_fmr_t *fmr)
1632{
1633 struct ib_pool_fmr *pfmr;
1634 kib_fmr_pool_t *fpo;
1635 __u64 version;
1636 int rc;
1637
1638 again:
1639 spin_lock(&fps->fps_lock);
1640 version = fps->fps_version;
1641 list_for_each_entry(fpo, &fps->fps_pool_list, fpo_list) {
1642 fpo->fpo_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1643 fpo->fpo_map_count++;
1644 spin_unlock(&fps->fps_lock);
1645
1646 pfmr = ib_fmr_pool_map_phys(fpo->fpo_fmr_pool,
1647 pages, npages, iov);
1648 if (likely(!IS_ERR(pfmr))) {
1649 fmr->fmr_pool = fpo;
1650 fmr->fmr_pfmr = pfmr;
1651 return 0;
1652 }
1653
1654 spin_lock(&fps->fps_lock);
1655 fpo->fpo_map_count--;
1656 if (PTR_ERR(pfmr) != -EAGAIN) {
1657 spin_unlock(&fps->fps_lock);
1658 return PTR_ERR(pfmr);
1659 }
1660
1661
1662 if (version != fps->fps_version) {
1663 spin_unlock(&fps->fps_lock);
1664 goto again;
1665 }
1666 }
1667
1668 if (fps->fps_increasing) {
1669 spin_unlock(&fps->fps_lock);
1670 CDEBUG(D_NET, "Another thread is allocating new "
1671 "FMR pool, waiting for her to complete\n");
1672 schedule();
1673 goto again;
1674
1675 }
1676
1677 if (cfs_time_before(cfs_time_current(), fps->fps_next_retry)) {
1678
1679 spin_unlock(&fps->fps_lock);
1680 return -EAGAIN;
1681 }
1682
1683 fps->fps_increasing = 1;
1684 spin_unlock(&fps->fps_lock);
1685
1686 CDEBUG(D_NET, "Allocate new FMR pool\n");
1687 rc = kiblnd_create_fmr_pool(fps, &fpo);
1688 spin_lock(&fps->fps_lock);
1689 fps->fps_increasing = 0;
1690 if (rc == 0) {
1691 fps->fps_version++;
1692 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1693 } else {
1694 fps->fps_next_retry = cfs_time_shift(IBLND_POOL_RETRY);
1695 }
1696 spin_unlock(&fps->fps_lock);
1697
1698 goto again;
1699}
1700
1701static void
1702kiblnd_fini_pool(kib_pool_t *pool)
1703{
1704 LASSERT (list_empty(&pool->po_free_list));
1705 LASSERT (pool->po_allocated == 0);
1706
1707 CDEBUG(D_NET, "Finalize %s pool\n", pool->po_owner->ps_name);
1708}
1709
1710static void
1711kiblnd_init_pool(kib_poolset_t *ps, kib_pool_t *pool, int size)
1712{
1713 CDEBUG(D_NET, "Initialize %s pool\n", ps->ps_name);
1714
1715 memset(pool, 0, sizeof(kib_pool_t));
1716 INIT_LIST_HEAD(&pool->po_free_list);
1717 pool->po_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1718 pool->po_owner = ps;
1719 pool->po_size = size;
1720}
1721
1722void
1723kiblnd_destroy_pool_list(struct list_head *head)
1724{
1725 kib_pool_t *pool;
1726
1727 while (!list_empty(head)) {
1728 pool = list_entry(head->next, kib_pool_t, po_list);
1729 list_del(&pool->po_list);
1730
1731 LASSERT (pool->po_owner != NULL);
1732 pool->po_owner->ps_pool_destroy(pool);
1733 }
1734}
1735
1736static void
1737kiblnd_fail_poolset(kib_poolset_t *ps, struct list_head *zombies)
1738{
1739 if (ps->ps_net == NULL)
1740 return;
1741
1742 spin_lock(&ps->ps_lock);
1743 while (!list_empty(&ps->ps_pool_list)) {
1744 kib_pool_t *po = list_entry(ps->ps_pool_list.next,
1745 kib_pool_t, po_list);
1746 po->po_failed = 1;
1747 list_del(&po->po_list);
1748 if (po->po_allocated == 0)
1749 list_add(&po->po_list, zombies);
1750 else
1751 list_add(&po->po_list, &ps->ps_failed_pool_list);
1752 }
1753 spin_unlock(&ps->ps_lock);
1754}
1755
1756static void
1757kiblnd_fini_poolset(kib_poolset_t *ps)
1758{
1759 if (ps->ps_net != NULL) {
1760 kiblnd_destroy_pool_list(&ps->ps_failed_pool_list);
1761 kiblnd_destroy_pool_list(&ps->ps_pool_list);
1762 }
1763}
1764
1765static int
1766kiblnd_init_poolset(kib_poolset_t *ps, int cpt,
1767 kib_net_t *net, char *name, int size,
1768 kib_ps_pool_create_t po_create,
1769 kib_ps_pool_destroy_t po_destroy,
1770 kib_ps_node_init_t nd_init,
1771 kib_ps_node_fini_t nd_fini)
1772{
1773 kib_pool_t *pool;
1774 int rc;
1775
1776 memset(ps, 0, sizeof(kib_poolset_t));
1777
1778 ps->ps_cpt = cpt;
1779 ps->ps_net = net;
1780 ps->ps_pool_create = po_create;
1781 ps->ps_pool_destroy = po_destroy;
1782 ps->ps_node_init = nd_init;
1783 ps->ps_node_fini = nd_fini;
1784 ps->ps_pool_size = size;
1785 if (strlcpy(ps->ps_name, name, sizeof(ps->ps_name))
1786 >= sizeof(ps->ps_name))
1787 return -E2BIG;
1788 spin_lock_init(&ps->ps_lock);
1789 INIT_LIST_HEAD(&ps->ps_pool_list);
1790 INIT_LIST_HEAD(&ps->ps_failed_pool_list);
1791
1792 rc = ps->ps_pool_create(ps, size, &pool);
1793 if (rc == 0)
1794 list_add(&pool->po_list, &ps->ps_pool_list);
1795 else
1796 CERROR("Failed to create the first pool for %s\n", ps->ps_name);
1797
1798 return rc;
1799}
1800
1801static int
1802kiblnd_pool_is_idle(kib_pool_t *pool, cfs_time_t now)
1803{
1804 if (pool->po_allocated != 0)
1805 return 0;
1806 if (pool->po_failed)
1807 return 1;
1808 return cfs_time_aftereq(now, pool->po_deadline);
1809}
1810
1811void
1812kiblnd_pool_free_node(kib_pool_t *pool, struct list_head *node)
1813{
1814 LIST_HEAD (zombies);
1815 kib_poolset_t *ps = pool->po_owner;
1816 kib_pool_t *tmp;
1817 cfs_time_t now = cfs_time_current();
1818
1819 spin_lock(&ps->ps_lock);
1820
1821 if (ps->ps_node_fini != NULL)
1822 ps->ps_node_fini(pool, node);
1823
1824 LASSERT (pool->po_allocated > 0);
1825 list_add(node, &pool->po_free_list);
1826 pool->po_allocated --;
1827
1828 list_for_each_entry_safe(pool, tmp, &ps->ps_pool_list, po_list) {
1829
1830 if (ps->ps_pool_list.next == &pool->po_list)
1831 continue;
1832
1833 if (kiblnd_pool_is_idle(pool, now))
1834 list_move(&pool->po_list, &zombies);
1835 }
1836 spin_unlock(&ps->ps_lock);
1837
1838 if (!list_empty(&zombies))
1839 kiblnd_destroy_pool_list(&zombies);
1840}
1841
1842struct list_head *
1843kiblnd_pool_alloc_node(kib_poolset_t *ps)
1844{
1845 struct list_head *node;
1846 kib_pool_t *pool;
1847 int rc;
1848
1849 again:
1850 spin_lock(&ps->ps_lock);
1851 list_for_each_entry(pool, &ps->ps_pool_list, po_list) {
1852 if (list_empty(&pool->po_free_list))
1853 continue;
1854
1855 pool->po_allocated ++;
1856 pool->po_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1857 node = pool->po_free_list.next;
1858 list_del(node);
1859
1860 if (ps->ps_node_init != NULL) {
1861
1862 ps->ps_node_init(pool, node);
1863 }
1864 spin_unlock(&ps->ps_lock);
1865 return node;
1866 }
1867
1868
1869 if (ps->ps_increasing) {
1870
1871 spin_unlock(&ps->ps_lock);
1872 CDEBUG(D_NET, "Another thread is allocating new "
1873 "%s pool, waiting for her to complete\n",
1874 ps->ps_name);
1875 schedule();
1876 goto again;
1877 }
1878
1879 if (cfs_time_before(cfs_time_current(), ps->ps_next_retry)) {
1880
1881 spin_unlock(&ps->ps_lock);
1882 return NULL;
1883 }
1884
1885 ps->ps_increasing = 1;
1886 spin_unlock(&ps->ps_lock);
1887
1888 CDEBUG(D_NET, "%s pool exhausted, allocate new pool\n", ps->ps_name);
1889
1890 rc = ps->ps_pool_create(ps, ps->ps_pool_size, &pool);
1891
1892 spin_lock(&ps->ps_lock);
1893 ps->ps_increasing = 0;
1894 if (rc == 0) {
1895 list_add_tail(&pool->po_list, &ps->ps_pool_list);
1896 } else {
1897 ps->ps_next_retry = cfs_time_shift(IBLND_POOL_RETRY);
1898 CERROR("Can't allocate new %s pool because out of memory\n",
1899 ps->ps_name);
1900 }
1901 spin_unlock(&ps->ps_lock);
1902
1903 goto again;
1904}
1905
1906void
1907kiblnd_pmr_pool_unmap(kib_phys_mr_t *pmr)
1908{
1909 kib_pmr_pool_t *ppo = pmr->pmr_pool;
1910 struct ib_mr *mr = pmr->pmr_mr;
1911
1912 pmr->pmr_mr = NULL;
1913 kiblnd_pool_free_node(&ppo->ppo_pool, &pmr->pmr_list);
1914 if (mr != NULL)
1915 ib_dereg_mr(mr);
1916}
1917
1918int
1919kiblnd_pmr_pool_map(kib_pmr_poolset_t *pps, kib_hca_dev_t *hdev,
1920 kib_rdma_desc_t *rd, __u64 *iova, kib_phys_mr_t **pp_pmr)
1921{
1922 kib_phys_mr_t *pmr;
1923 struct list_head *node;
1924 int rc;
1925 int i;
1926
1927 node = kiblnd_pool_alloc_node(&pps->pps_poolset);
1928 if (node == NULL) {
1929 CERROR("Failed to allocate PMR descriptor\n");
1930 return -ENOMEM;
1931 }
1932
1933 pmr = container_of(node, kib_phys_mr_t, pmr_list);
1934 if (pmr->pmr_pool->ppo_hdev != hdev) {
1935 kiblnd_pool_free_node(&pmr->pmr_pool->ppo_pool, node);
1936 return -EAGAIN;
1937 }
1938
1939 for (i = 0; i < rd->rd_nfrags; i ++) {
1940 pmr->pmr_ipb[i].addr = rd->rd_frags[i].rf_addr;
1941 pmr->pmr_ipb[i].size = rd->rd_frags[i].rf_nob;
1942 }
1943
1944 pmr->pmr_mr = ib_reg_phys_mr(hdev->ibh_pd,
1945 pmr->pmr_ipb, rd->rd_nfrags,
1946 IB_ACCESS_LOCAL_WRITE |
1947 IB_ACCESS_REMOTE_WRITE,
1948 iova);
1949 if (!IS_ERR(pmr->pmr_mr)) {
1950 pmr->pmr_iova = *iova;
1951 *pp_pmr = pmr;
1952 return 0;
1953 }
1954
1955 rc = PTR_ERR(pmr->pmr_mr);
1956 CERROR("Failed ib_reg_phys_mr: %d\n", rc);
1957
1958 pmr->pmr_mr = NULL;
1959 kiblnd_pool_free_node(&pmr->pmr_pool->ppo_pool, node);
1960
1961 return rc;
1962}
1963
1964static void
1965kiblnd_destroy_pmr_pool(kib_pool_t *pool)
1966{
1967 kib_pmr_pool_t *ppo = container_of(pool, kib_pmr_pool_t, ppo_pool);
1968 kib_phys_mr_t *pmr;
1969
1970 LASSERT (pool->po_allocated == 0);
1971
1972 while (!list_empty(&pool->po_free_list)) {
1973 pmr = list_entry(pool->po_free_list.next,
1974 kib_phys_mr_t, pmr_list);
1975
1976 LASSERT (pmr->pmr_mr == NULL);
1977 list_del(&pmr->pmr_list);
1978
1979 if (pmr->pmr_ipb != NULL) {
1980 LIBCFS_FREE(pmr->pmr_ipb,
1981 IBLND_MAX_RDMA_FRAGS *
1982 sizeof(struct ib_phys_buf));
1983 }
1984
1985 LIBCFS_FREE(pmr, sizeof(kib_phys_mr_t));
1986 }
1987
1988 kiblnd_fini_pool(pool);
1989 if (ppo->ppo_hdev != NULL)
1990 kiblnd_hdev_decref(ppo->ppo_hdev);
1991
1992 LIBCFS_FREE(ppo, sizeof(kib_pmr_pool_t));
1993}
1994
1995static inline int kiblnd_pmr_pool_size(int ncpts)
1996{
1997 int size = *kiblnd_tunables.kib_pmr_pool_size / ncpts;
1998
1999 return max(IBLND_PMR_POOL, size);
2000}
2001
2002static int
2003kiblnd_create_pmr_pool(kib_poolset_t *ps, int size, kib_pool_t **pp_po)
2004{
2005 struct kib_pmr_pool *ppo;
2006 struct kib_pool *pool;
2007 kib_phys_mr_t *pmr;
2008 int i;
2009
2010 LIBCFS_CPT_ALLOC(ppo, lnet_cpt_table(),
2011 ps->ps_cpt, sizeof(kib_pmr_pool_t));
2012 if (ppo == NULL) {
2013 CERROR("Failed to allocate PMR pool\n");
2014 return -ENOMEM;
2015 }
2016
2017 pool = &ppo->ppo_pool;
2018 kiblnd_init_pool(ps, pool, size);
2019
2020 for (i = 0; i < size; i++) {
2021 LIBCFS_CPT_ALLOC(pmr, lnet_cpt_table(),
2022 ps->ps_cpt, sizeof(kib_phys_mr_t));
2023 if (pmr == NULL)
2024 break;
2025
2026 pmr->pmr_pool = ppo;
2027 LIBCFS_CPT_ALLOC(pmr->pmr_ipb, lnet_cpt_table(), ps->ps_cpt,
2028 IBLND_MAX_RDMA_FRAGS * sizeof(*pmr->pmr_ipb));
2029 if (pmr->pmr_ipb == NULL)
2030 break;
2031
2032 list_add(&pmr->pmr_list, &pool->po_free_list);
2033 }
2034
2035 if (i < size) {
2036 ps->ps_pool_destroy(pool);
2037 return -ENOMEM;
2038 }
2039
2040 ppo->ppo_hdev = kiblnd_current_hdev(ps->ps_net->ibn_dev);
2041 *pp_po = pool;
2042 return 0;
2043}
2044
2045static void
2046kiblnd_destroy_tx_pool(kib_pool_t *pool)
2047{
2048 kib_tx_pool_t *tpo = container_of(pool, kib_tx_pool_t, tpo_pool);
2049 int i;
2050
2051 LASSERT (pool->po_allocated == 0);
2052
2053 if (tpo->tpo_tx_pages != NULL) {
2054 kiblnd_unmap_tx_pool(tpo);
2055 kiblnd_free_pages(tpo->tpo_tx_pages);
2056 }
2057
2058 if (tpo->tpo_tx_descs == NULL)
2059 goto out;
2060
2061 for (i = 0; i < pool->po_size; i++) {
2062 kib_tx_t *tx = &tpo->tpo_tx_descs[i];
2063
2064 list_del(&tx->tx_list);
2065 if (tx->tx_pages != NULL)
2066 LIBCFS_FREE(tx->tx_pages,
2067 LNET_MAX_IOV *
2068 sizeof(*tx->tx_pages));
2069 if (tx->tx_frags != NULL)
2070 LIBCFS_FREE(tx->tx_frags,
2071 IBLND_MAX_RDMA_FRAGS *
2072 sizeof(*tx->tx_frags));
2073 if (tx->tx_wrq != NULL)
2074 LIBCFS_FREE(tx->tx_wrq,
2075 (1 + IBLND_MAX_RDMA_FRAGS) *
2076 sizeof(*tx->tx_wrq));
2077 if (tx->tx_sge != NULL)
2078 LIBCFS_FREE(tx->tx_sge,
2079 (1 + IBLND_MAX_RDMA_FRAGS) *
2080 sizeof(*tx->tx_sge));
2081 if (tx->tx_rd != NULL)
2082 LIBCFS_FREE(tx->tx_rd,
2083 offsetof(kib_rdma_desc_t,
2084 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2085 }
2086
2087 LIBCFS_FREE(tpo->tpo_tx_descs,
2088 pool->po_size * sizeof(kib_tx_t));
2089out:
2090 kiblnd_fini_pool(pool);
2091 LIBCFS_FREE(tpo, sizeof(kib_tx_pool_t));
2092}
2093
2094static int kiblnd_tx_pool_size(int ncpts)
2095{
2096 int ntx = *kiblnd_tunables.kib_ntx / ncpts;
2097
2098 return max(IBLND_TX_POOL, ntx);
2099}
2100
2101static int
2102kiblnd_create_tx_pool(kib_poolset_t *ps, int size, kib_pool_t **pp_po)
2103{
2104 int i;
2105 int npg;
2106 kib_pool_t *pool;
2107 kib_tx_pool_t *tpo;
2108
2109 LIBCFS_CPT_ALLOC(tpo, lnet_cpt_table(), ps->ps_cpt, sizeof(*tpo));
2110 if (tpo == NULL) {
2111 CERROR("Failed to allocate TX pool\n");
2112 return -ENOMEM;
2113 }
2114
2115 pool = &tpo->tpo_pool;
2116 kiblnd_init_pool(ps, pool, size);
2117 tpo->tpo_tx_descs = NULL;
2118 tpo->tpo_tx_pages = NULL;
2119
2120 npg = (size * IBLND_MSG_SIZE + PAGE_SIZE - 1) / PAGE_SIZE;
2121 if (kiblnd_alloc_pages(&tpo->tpo_tx_pages, ps->ps_cpt, npg) != 0) {
2122 CERROR("Can't allocate tx pages: %d\n", npg);
2123 LIBCFS_FREE(tpo, sizeof(kib_tx_pool_t));
2124 return -ENOMEM;
2125 }
2126
2127 LIBCFS_CPT_ALLOC(tpo->tpo_tx_descs, lnet_cpt_table(), ps->ps_cpt,
2128 size * sizeof(kib_tx_t));
2129 if (tpo->tpo_tx_descs == NULL) {
2130 CERROR("Can't allocate %d tx descriptors\n", size);
2131 ps->ps_pool_destroy(pool);
2132 return -ENOMEM;
2133 }
2134
2135 memset(tpo->tpo_tx_descs, 0, size * sizeof(kib_tx_t));
2136
2137 for (i = 0; i < size; i++) {
2138 kib_tx_t *tx = &tpo->tpo_tx_descs[i];
2139
2140 tx->tx_pool = tpo;
2141 if (ps->ps_net->ibn_fmr_ps != NULL) {
2142 LIBCFS_CPT_ALLOC(tx->tx_pages,
2143 lnet_cpt_table(), ps->ps_cpt,
2144 LNET_MAX_IOV * sizeof(*tx->tx_pages));
2145 if (tx->tx_pages == NULL)
2146 break;
2147 }
2148
2149 LIBCFS_CPT_ALLOC(tx->tx_frags, lnet_cpt_table(), ps->ps_cpt,
2150 IBLND_MAX_RDMA_FRAGS * sizeof(*tx->tx_frags));
2151 if (tx->tx_frags == NULL)
2152 break;
2153
2154 sg_init_table(tx->tx_frags, IBLND_MAX_RDMA_FRAGS);
2155
2156 LIBCFS_CPT_ALLOC(tx->tx_wrq, lnet_cpt_table(), ps->ps_cpt,
2157 (1 + IBLND_MAX_RDMA_FRAGS) *
2158 sizeof(*tx->tx_wrq));
2159 if (tx->tx_wrq == NULL)
2160 break;
2161
2162 LIBCFS_CPT_ALLOC(tx->tx_sge, lnet_cpt_table(), ps->ps_cpt,
2163 (1 + IBLND_MAX_RDMA_FRAGS) *
2164 sizeof(*tx->tx_sge));
2165 if (tx->tx_sge == NULL)
2166 break;
2167
2168 LIBCFS_CPT_ALLOC(tx->tx_rd, lnet_cpt_table(), ps->ps_cpt,
2169 offsetof(kib_rdma_desc_t,
2170 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2171 if (tx->tx_rd == NULL)
2172 break;
2173 }
2174
2175 if (i == size) {
2176 kiblnd_map_tx_pool(tpo);
2177 *pp_po = pool;
2178 return 0;
2179 }
2180
2181 ps->ps_pool_destroy(pool);
2182 return -ENOMEM;
2183}
2184
2185static void
2186kiblnd_tx_init(kib_pool_t *pool, struct list_head *node)
2187{
2188 kib_tx_poolset_t *tps = container_of(pool->po_owner, kib_tx_poolset_t,
2189 tps_poolset);
2190 kib_tx_t *tx = list_entry(node, kib_tx_t, tx_list);
2191
2192 tx->tx_cookie = tps->tps_next_tx_cookie ++;
2193}
2194
2195void
2196kiblnd_net_fini_pools(kib_net_t *net)
2197{
2198 int i;
2199
2200 cfs_cpt_for_each(i, lnet_cpt_table()) {
2201 kib_tx_poolset_t *tps;
2202 kib_fmr_poolset_t *fps;
2203 kib_pmr_poolset_t *pps;
2204
2205 if (net->ibn_tx_ps != NULL) {
2206 tps = net->ibn_tx_ps[i];
2207 kiblnd_fini_poolset(&tps->tps_poolset);
2208 }
2209
2210 if (net->ibn_fmr_ps != NULL) {
2211 fps = net->ibn_fmr_ps[i];
2212 kiblnd_fini_fmr_poolset(fps);
2213 }
2214
2215 if (net->ibn_pmr_ps != NULL) {
2216 pps = net->ibn_pmr_ps[i];
2217 kiblnd_fini_poolset(&pps->pps_poolset);
2218 }
2219 }
2220
2221 if (net->ibn_tx_ps != NULL) {
2222 cfs_percpt_free(net->ibn_tx_ps);
2223 net->ibn_tx_ps = NULL;
2224 }
2225
2226 if (net->ibn_fmr_ps != NULL) {
2227 cfs_percpt_free(net->ibn_fmr_ps);
2228 net->ibn_fmr_ps = NULL;
2229 }
2230
2231 if (net->ibn_pmr_ps != NULL) {
2232 cfs_percpt_free(net->ibn_pmr_ps);
2233 net->ibn_pmr_ps = NULL;
2234 }
2235}
2236
2237int
2238kiblnd_net_init_pools(kib_net_t *net, __u32 *cpts, int ncpts)
2239{
2240 unsigned long flags;
2241 int cpt;
2242 int rc;
2243 int i;
2244
2245 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2246 if (*kiblnd_tunables.kib_map_on_demand == 0 &&
2247 net->ibn_dev->ibd_hdev->ibh_nmrs == 1) {
2248 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
2249 flags);
2250 goto create_tx_pool;
2251 }
2252
2253 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2254
2255 if (*kiblnd_tunables.kib_fmr_pool_size <
2256 *kiblnd_tunables.kib_ntx / 4) {
2257 CERROR("Can't set fmr pool size (%d) < ntx / 4(%d)\n",
2258 *kiblnd_tunables.kib_fmr_pool_size,
2259 *kiblnd_tunables.kib_ntx / 4);
2260 rc = -EINVAL;
2261 goto failed;
2262 }
2263
2264
2265
2266 LASSERT(net->ibn_tx_ps == NULL);
2267
2268
2269
2270
2271 net->ibn_fmr_ps = cfs_percpt_alloc(lnet_cpt_table(),
2272 sizeof(kib_fmr_poolset_t));
2273 if (net->ibn_fmr_ps == NULL) {
2274 CERROR("Failed to allocate FMR pool array\n");
2275 rc = -ENOMEM;
2276 goto failed;
2277 }
2278
2279 for (i = 0; i < ncpts; i++) {
2280 cpt = (cpts == NULL) ? i : cpts[i];
2281 rc = kiblnd_init_fmr_poolset(net->ibn_fmr_ps[cpt], cpt, net,
2282 kiblnd_fmr_pool_size(ncpts),
2283 kiblnd_fmr_flush_trigger(ncpts));
2284 if (rc == -ENOSYS && i == 0)
2285 break;
2286
2287 if (rc != 0) {
2288 CERROR("Can't initialize FMR pool for CPT %d: %d\n",
2289 cpt, rc);
2290 goto failed;
2291 }
2292 }
2293
2294 if (i > 0) {
2295 LASSERT(i == ncpts);
2296 goto create_tx_pool;
2297 }
2298
2299 cfs_percpt_free(net->ibn_fmr_ps);
2300 net->ibn_fmr_ps = NULL;
2301
2302 CWARN("Device does not support FMR, failing back to PMR\n");
2303
2304 if (*kiblnd_tunables.kib_pmr_pool_size <
2305 *kiblnd_tunables.kib_ntx / 4) {
2306 CERROR("Can't set pmr pool size (%d) < ntx / 4(%d)\n",
2307 *kiblnd_tunables.kib_pmr_pool_size,
2308 *kiblnd_tunables.kib_ntx / 4);
2309 rc = -EINVAL;
2310 goto failed;
2311 }
2312
2313 net->ibn_pmr_ps = cfs_percpt_alloc(lnet_cpt_table(),
2314 sizeof(kib_pmr_poolset_t));
2315 if (net->ibn_pmr_ps == NULL) {
2316 CERROR("Failed to allocate PMR pool array\n");
2317 rc = -ENOMEM;
2318 goto failed;
2319 }
2320
2321 for (i = 0; i < ncpts; i++) {
2322 cpt = (cpts == NULL) ? i : cpts[i];
2323 rc = kiblnd_init_poolset(&net->ibn_pmr_ps[cpt]->pps_poolset,
2324 cpt, net, "PMR",
2325 kiblnd_pmr_pool_size(ncpts),
2326 kiblnd_create_pmr_pool,
2327 kiblnd_destroy_pmr_pool, NULL, NULL);
2328 if (rc != 0) {
2329 CERROR("Can't initialize PMR pool for CPT %d: %d\n",
2330 cpt, rc);
2331 goto failed;
2332 }
2333 }
2334
2335 create_tx_pool:
2336 net->ibn_tx_ps = cfs_percpt_alloc(lnet_cpt_table(),
2337 sizeof(kib_tx_poolset_t));
2338 if (net->ibn_tx_ps == NULL) {
2339 CERROR("Failed to allocate tx pool array\n");
2340 rc = -ENOMEM;
2341 goto failed;
2342 }
2343
2344 for (i = 0; i < ncpts; i++) {
2345 cpt = (cpts == NULL) ? i : cpts[i];
2346 rc = kiblnd_init_poolset(&net->ibn_tx_ps[cpt]->tps_poolset,
2347 cpt, net, "TX",
2348 kiblnd_tx_pool_size(ncpts),
2349 kiblnd_create_tx_pool,
2350 kiblnd_destroy_tx_pool,
2351 kiblnd_tx_init, NULL);
2352 if (rc != 0) {
2353 CERROR("Can't initialize TX pool for CPT %d: %d\n",
2354 cpt, rc);
2355 goto failed;
2356 }
2357 }
2358
2359 return 0;
2360 failed:
2361 kiblnd_net_fini_pools(net);
2362 LASSERT(rc != 0);
2363 return rc;
2364}
2365
2366static int
2367kiblnd_hdev_get_attr(kib_hca_dev_t *hdev)
2368{
2369 struct ib_device_attr *attr;
2370 int rc;
2371
2372
2373
2374 hdev->ibh_page_shift = PAGE_SHIFT;
2375 hdev->ibh_page_size = 1 << PAGE_SHIFT;
2376 hdev->ibh_page_mask = ~((__u64)hdev->ibh_page_size - 1);
2377
2378 LIBCFS_ALLOC(attr, sizeof(*attr));
2379 if (attr == NULL) {
2380 CERROR("Out of memory\n");
2381 return -ENOMEM;
2382 }
2383
2384 rc = ib_query_device(hdev->ibh_ibdev, attr);
2385 if (rc == 0)
2386 hdev->ibh_mr_size = attr->max_mr_size;
2387
2388 LIBCFS_FREE(attr, sizeof(*attr));
2389
2390 if (rc != 0) {
2391 CERROR("Failed to query IB device: %d\n", rc);
2392 return rc;
2393 }
2394
2395 if (hdev->ibh_mr_size == ~0ULL) {
2396 hdev->ibh_mr_shift = 64;
2397 return 0;
2398 }
2399
2400 for (hdev->ibh_mr_shift = 0;
2401 hdev->ibh_mr_shift < 64; hdev->ibh_mr_shift ++) {
2402 if (hdev->ibh_mr_size == (1ULL << hdev->ibh_mr_shift) ||
2403 hdev->ibh_mr_size == (1ULL << hdev->ibh_mr_shift) - 1)
2404 return 0;
2405 }
2406
2407 CERROR("Invalid mr size: "LPX64"\n", hdev->ibh_mr_size);
2408 return -EINVAL;
2409}
2410
2411void
2412kiblnd_hdev_cleanup_mrs(kib_hca_dev_t *hdev)
2413{
2414 int i;
2415
2416 if (hdev->ibh_nmrs == 0 || hdev->ibh_mrs == NULL)
2417 return;
2418
2419 for (i = 0; i < hdev->ibh_nmrs; i++) {
2420 if (hdev->ibh_mrs[i] == NULL)
2421 break;
2422
2423 ib_dereg_mr(hdev->ibh_mrs[i]);
2424 }
2425
2426 LIBCFS_FREE(hdev->ibh_mrs, sizeof(*hdev->ibh_mrs) * hdev->ibh_nmrs);
2427 hdev->ibh_mrs = NULL;
2428 hdev->ibh_nmrs = 0;
2429}
2430
2431void
2432kiblnd_hdev_destroy(kib_hca_dev_t *hdev)
2433{
2434 kiblnd_hdev_cleanup_mrs(hdev);
2435
2436 if (hdev->ibh_pd != NULL)
2437 ib_dealloc_pd(hdev->ibh_pd);
2438
2439 if (hdev->ibh_cmid != NULL)
2440 rdma_destroy_id(hdev->ibh_cmid);
2441
2442 LIBCFS_FREE(hdev, sizeof(*hdev));
2443}
2444
2445int
2446kiblnd_hdev_setup_mrs(kib_hca_dev_t *hdev)
2447{
2448 struct ib_mr *mr;
2449 int i;
2450 int rc;
2451 __u64 mm_size;
2452 __u64 mr_size;
2453 int acflags = IB_ACCESS_LOCAL_WRITE |
2454 IB_ACCESS_REMOTE_WRITE;
2455
2456 rc = kiblnd_hdev_get_attr(hdev);
2457 if (rc != 0)
2458 return rc;
2459
2460 if (hdev->ibh_mr_shift == 64) {
2461 LIBCFS_ALLOC(hdev->ibh_mrs, 1 * sizeof(*hdev->ibh_mrs));
2462 if (hdev->ibh_mrs == NULL) {
2463 CERROR("Failed to allocate MRs table\n");
2464 return -ENOMEM;
2465 }
2466
2467 hdev->ibh_mrs[0] = NULL;
2468 hdev->ibh_nmrs = 1;
2469
2470 mr = ib_get_dma_mr(hdev->ibh_pd, acflags);
2471 if (IS_ERR(mr)) {
2472 CERROR("Failed ib_get_dma_mr : %ld\n", PTR_ERR(mr));
2473 kiblnd_hdev_cleanup_mrs(hdev);
2474 return PTR_ERR(mr);
2475 }
2476
2477 hdev->ibh_mrs[0] = mr;
2478
2479 goto out;
2480 }
2481
2482 mr_size = (1ULL << hdev->ibh_mr_shift);
2483 mm_size = (unsigned long)high_memory - PAGE_OFFSET;
2484
2485 hdev->ibh_nmrs = (int)((mm_size + mr_size - 1) >> hdev->ibh_mr_shift);
2486
2487 if (hdev->ibh_mr_shift < 32 || hdev->ibh_nmrs > 1024) {
2488
2489 CERROR("Can't support memory size: x"LPX64
2490 " with MR size: x"LPX64"\n", mm_size, mr_size);
2491 return -EINVAL;
2492 }
2493
2494
2495 LIBCFS_ALLOC(hdev->ibh_mrs, sizeof(*hdev->ibh_mrs) * hdev->ibh_nmrs);
2496 if (hdev->ibh_mrs == NULL) {
2497 CERROR("Failed to allocate MRs' table\n");
2498 return -ENOMEM;
2499 }
2500
2501 memset(hdev->ibh_mrs, 0, sizeof(*hdev->ibh_mrs) * hdev->ibh_nmrs);
2502
2503 for (i = 0; i < hdev->ibh_nmrs; i++) {
2504 struct ib_phys_buf ipb;
2505 __u64 iova;
2506
2507 ipb.size = hdev->ibh_mr_size;
2508 ipb.addr = i * mr_size;
2509 iova = ipb.addr;
2510
2511 mr = ib_reg_phys_mr(hdev->ibh_pd, &ipb, 1, acflags, &iova);
2512 if (IS_ERR(mr)) {
2513 CERROR("Failed ib_reg_phys_mr addr "LPX64
2514 " size "LPX64" : %ld\n",
2515 ipb.addr, ipb.size, PTR_ERR(mr));
2516 kiblnd_hdev_cleanup_mrs(hdev);
2517 return PTR_ERR(mr);
2518 }
2519
2520 LASSERT (iova == ipb.addr);
2521
2522 hdev->ibh_mrs[i] = mr;
2523 }
2524
2525out:
2526 if (hdev->ibh_mr_size != ~0ULL || hdev->ibh_nmrs != 1)
2527 LCONSOLE_INFO("Register global MR array, MR size: "
2528 LPX64", array size: %d\n",
2529 hdev->ibh_mr_size, hdev->ibh_nmrs);
2530 return 0;
2531}
2532
2533static int
2534kiblnd_dummy_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event)
2535{
2536 return 0;
2537}
2538
2539static int
2540kiblnd_dev_need_failover(kib_dev_t *dev)
2541{
2542 struct rdma_cm_id *cmid;
2543 struct sockaddr_in srcaddr;
2544 struct sockaddr_in dstaddr;
2545 int rc;
2546
2547 if (dev->ibd_hdev == NULL ||
2548 dev->ibd_hdev->ibh_cmid == NULL ||
2549 *kiblnd_tunables.kib_dev_failover > 1)
2550 return 1;
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562 cmid = kiblnd_rdma_create_id(kiblnd_dummy_callback, dev, RDMA_PS_TCP,
2563 IB_QPT_RC);
2564 if (IS_ERR(cmid)) {
2565 rc = PTR_ERR(cmid);
2566 CERROR("Failed to create cmid for failover: %d\n", rc);
2567 return rc;
2568 }
2569
2570 memset(&srcaddr, 0, sizeof(srcaddr));
2571 srcaddr.sin_family = AF_INET;
2572 srcaddr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2573
2574 memset(&dstaddr, 0, sizeof(dstaddr));
2575 dstaddr.sin_family = AF_INET;
2576 rc = rdma_resolve_addr(cmid, (struct sockaddr *)&srcaddr,
2577 (struct sockaddr *)&dstaddr, 1);
2578 if (rc != 0 || cmid->device == NULL) {
2579 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2580 dev->ibd_ifname, &dev->ibd_ifip,
2581 cmid->device, rc);
2582 rdma_destroy_id(cmid);
2583 return rc;
2584 }
2585
2586 if (dev->ibd_hdev->ibh_ibdev == cmid->device) {
2587
2588 rdma_destroy_id(cmid);
2589 return 0;
2590 }
2591
2592 return 1;
2593}
2594
2595int
2596kiblnd_dev_failover(kib_dev_t *dev)
2597{
2598 LIST_HEAD (zombie_tpo);
2599 LIST_HEAD (zombie_ppo);
2600 LIST_HEAD (zombie_fpo);
2601 struct rdma_cm_id *cmid = NULL;
2602 kib_hca_dev_t *hdev = NULL;
2603 kib_hca_dev_t *old;
2604 struct ib_pd *pd;
2605 kib_net_t *net;
2606 struct sockaddr_in addr;
2607 unsigned long flags;
2608 int rc = 0;
2609 int i;
2610
2611 LASSERT (*kiblnd_tunables.kib_dev_failover > 1 ||
2612 dev->ibd_can_failover ||
2613 dev->ibd_hdev == NULL);
2614
2615 rc = kiblnd_dev_need_failover(dev);
2616 if (rc <= 0)
2617 goto out;
2618
2619 if (dev->ibd_hdev != NULL &&
2620 dev->ibd_hdev->ibh_cmid != NULL) {
2621
2622
2623
2624
2625 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2626
2627 cmid = dev->ibd_hdev->ibh_cmid;
2628
2629
2630 dev->ibd_hdev->ibh_cmid = NULL;
2631 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2632
2633 rdma_destroy_id(cmid);
2634 }
2635
2636 cmid = kiblnd_rdma_create_id(kiblnd_cm_callback, dev, RDMA_PS_TCP,
2637 IB_QPT_RC);
2638 if (IS_ERR(cmid)) {
2639 rc = PTR_ERR(cmid);
2640 CERROR("Failed to create cmid for failover: %d\n", rc);
2641 goto out;
2642 }
2643
2644 memset(&addr, 0, sizeof(addr));
2645 addr.sin_family = AF_INET;
2646 addr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2647 addr.sin_port = htons(*kiblnd_tunables.kib_service);
2648
2649
2650 rc = rdma_bind_addr(cmid, (struct sockaddr *)&addr);
2651 if (rc != 0 || cmid->device == NULL) {
2652 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2653 dev->ibd_ifname, &dev->ibd_ifip,
2654 cmid->device, rc);
2655 rdma_destroy_id(cmid);
2656 goto out;
2657 }
2658
2659 LIBCFS_ALLOC(hdev, sizeof(*hdev));
2660 if (hdev == NULL) {
2661 CERROR("Failed to allocate kib_hca_dev\n");
2662 rdma_destroy_id(cmid);
2663 rc = -ENOMEM;
2664 goto out;
2665 }
2666
2667 atomic_set(&hdev->ibh_ref, 1);
2668 hdev->ibh_dev = dev;
2669 hdev->ibh_cmid = cmid;
2670 hdev->ibh_ibdev = cmid->device;
2671
2672 pd = ib_alloc_pd(cmid->device);
2673 if (IS_ERR(pd)) {
2674 rc = PTR_ERR(pd);
2675 CERROR("Can't allocate PD: %d\n", rc);
2676 goto out;
2677 }
2678
2679 hdev->ibh_pd = pd;
2680
2681 rc = rdma_listen(cmid, 0);
2682 if (rc != 0) {
2683 CERROR("Can't start new listener: %d\n", rc);
2684 goto out;
2685 }
2686
2687 rc = kiblnd_hdev_setup_mrs(hdev);
2688 if (rc != 0) {
2689 CERROR("Can't setup device: %d\n", rc);
2690 goto out;
2691 }
2692
2693 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2694
2695 old = dev->ibd_hdev;
2696 dev->ibd_hdev = hdev;
2697 hdev = old;
2698
2699 list_for_each_entry(net, &dev->ibd_nets, ibn_list) {
2700 cfs_cpt_for_each(i, lnet_cpt_table()) {
2701 kiblnd_fail_poolset(&net->ibn_tx_ps[i]->tps_poolset,
2702 &zombie_tpo);
2703
2704 if (net->ibn_fmr_ps != NULL) {
2705 kiblnd_fail_fmr_poolset(net->ibn_fmr_ps[i],
2706 &zombie_fpo);
2707
2708 } else if (net->ibn_pmr_ps != NULL) {
2709 kiblnd_fail_poolset(&net->ibn_pmr_ps[i]->
2710 pps_poolset, &zombie_ppo);
2711 }
2712 }
2713 }
2714
2715 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2716 out:
2717 if (!list_empty(&zombie_tpo))
2718 kiblnd_destroy_pool_list(&zombie_tpo);
2719 if (!list_empty(&zombie_ppo))
2720 kiblnd_destroy_pool_list(&zombie_ppo);
2721 if (!list_empty(&zombie_fpo))
2722 kiblnd_destroy_fmr_pool_list(&zombie_fpo);
2723 if (hdev != NULL)
2724 kiblnd_hdev_decref(hdev);
2725
2726 if (rc != 0)
2727 dev->ibd_failed_failover++;
2728 else
2729 dev->ibd_failed_failover = 0;
2730
2731 return rc;
2732}
2733
2734void
2735kiblnd_destroy_dev (kib_dev_t *dev)
2736{
2737 LASSERT (dev->ibd_nnets == 0);
2738 LASSERT (list_empty(&dev->ibd_nets));
2739
2740 list_del(&dev->ibd_fail_list);
2741 list_del(&dev->ibd_list);
2742
2743 if (dev->ibd_hdev != NULL)
2744 kiblnd_hdev_decref(dev->ibd_hdev);
2745
2746 LIBCFS_FREE(dev, sizeof(*dev));
2747}
2748
2749kib_dev_t *
2750kiblnd_create_dev(char *ifname)
2751{
2752 struct net_device *netdev;
2753 kib_dev_t *dev;
2754 __u32 netmask;
2755 __u32 ip;
2756 int up;
2757 int rc;
2758
2759 rc = libcfs_ipif_query(ifname, &up, &ip, &netmask);
2760 if (rc != 0) {
2761 CERROR("Can't query IPoIB interface %s: %d\n",
2762 ifname, rc);
2763 return NULL;
2764 }
2765
2766 if (!up) {
2767 CERROR("Can't query IPoIB interface %s: it's down\n", ifname);
2768 return NULL;
2769 }
2770
2771 LIBCFS_ALLOC(dev, sizeof(*dev));
2772 if (dev == NULL)
2773 return NULL;
2774
2775 memset(dev, 0, sizeof(*dev));
2776 netdev = dev_get_by_name(&init_net, ifname);
2777 if (netdev == NULL) {
2778 dev->ibd_can_failover = 0;
2779 } else {
2780 dev->ibd_can_failover = !!(netdev->flags & IFF_MASTER);
2781 dev_put(netdev);
2782 }
2783
2784 INIT_LIST_HEAD(&dev->ibd_nets);
2785 INIT_LIST_HEAD(&dev->ibd_list);
2786 INIT_LIST_HEAD(&dev->ibd_fail_list);
2787 dev->ibd_ifip = ip;
2788 strcpy(&dev->ibd_ifname[0], ifname);
2789
2790
2791 rc = kiblnd_dev_failover(dev);
2792 if (rc != 0) {
2793 CERROR("Can't initialize device: %d\n", rc);
2794 LIBCFS_FREE(dev, sizeof(*dev));
2795 return NULL;
2796 }
2797
2798 list_add_tail(&dev->ibd_list,
2799 &kiblnd_data.kib_devs);
2800 return dev;
2801}
2802
2803void
2804kiblnd_base_shutdown(void)
2805{
2806 struct kib_sched_info *sched;
2807 int i;
2808
2809 LASSERT (list_empty(&kiblnd_data.kib_devs));
2810
2811 CDEBUG(D_MALLOC, "before LND base cleanup: kmem %d\n",
2812 atomic_read(&libcfs_kmemory));
2813
2814 switch (kiblnd_data.kib_init) {
2815 default:
2816 LBUG();
2817
2818 case IBLND_INIT_ALL:
2819 case IBLND_INIT_DATA:
2820 LASSERT (kiblnd_data.kib_peers != NULL);
2821 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
2822 LASSERT (list_empty(&kiblnd_data.kib_peers[i]));
2823 }
2824 LASSERT (list_empty(&kiblnd_data.kib_connd_zombies));
2825 LASSERT (list_empty(&kiblnd_data.kib_connd_conns));
2826
2827
2828 kiblnd_data.kib_shutdown = 1;
2829
2830
2831
2832
2833 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds)
2834 wake_up_all(&sched->ibs_waitq);
2835
2836 wake_up_all(&kiblnd_data.kib_connd_waitq);
2837 wake_up_all(&kiblnd_data.kib_failover_waitq);
2838
2839 i = 2;
2840 while (atomic_read(&kiblnd_data.kib_nthreads) != 0) {
2841 i++;
2842 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET,
2843 "Waiting for %d threads to terminate\n",
2844 atomic_read(&kiblnd_data.kib_nthreads));
2845 cfs_pause(cfs_time_seconds(1));
2846 }
2847
2848
2849
2850 case IBLND_INIT_NOTHING:
2851 break;
2852 }
2853
2854 if (kiblnd_data.kib_peers != NULL) {
2855 LIBCFS_FREE(kiblnd_data.kib_peers,
2856 sizeof(struct list_head) *
2857 kiblnd_data.kib_peer_hash_size);
2858 }
2859
2860 if (kiblnd_data.kib_scheds != NULL)
2861 cfs_percpt_free(kiblnd_data.kib_scheds);
2862
2863 CDEBUG(D_MALLOC, "after LND base cleanup: kmem %d\n",
2864 atomic_read(&libcfs_kmemory));
2865
2866 kiblnd_data.kib_init = IBLND_INIT_NOTHING;
2867 module_put(THIS_MODULE);
2868}
2869
2870void
2871kiblnd_shutdown (lnet_ni_t *ni)
2872{
2873 kib_net_t *net = ni->ni_data;
2874 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2875 int i;
2876 unsigned long flags;
2877
2878 LASSERT(kiblnd_data.kib_init == IBLND_INIT_ALL);
2879
2880 if (net == NULL)
2881 goto out;
2882
2883 CDEBUG(D_MALLOC, "before LND net cleanup: kmem %d\n",
2884 atomic_read(&libcfs_kmemory));
2885
2886 write_lock_irqsave(g_lock, flags);
2887 net->ibn_shutdown = 1;
2888 write_unlock_irqrestore(g_lock, flags);
2889
2890 switch (net->ibn_init) {
2891 default:
2892 LBUG();
2893
2894 case IBLND_INIT_ALL:
2895
2896 kiblnd_del_peer(ni, LNET_NID_ANY);
2897
2898
2899 i = 2;
2900 while (atomic_read(&net->ibn_npeers) != 0) {
2901 i++;
2902 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET,
2903 "%s: waiting for %d peers to disconnect\n",
2904 libcfs_nid2str(ni->ni_nid),
2905 atomic_read(&net->ibn_npeers));
2906 cfs_pause(cfs_time_seconds(1));
2907 }
2908
2909 kiblnd_net_fini_pools(net);
2910
2911 write_lock_irqsave(g_lock, flags);
2912 LASSERT(net->ibn_dev->ibd_nnets > 0);
2913 net->ibn_dev->ibd_nnets--;
2914 list_del(&net->ibn_list);
2915 write_unlock_irqrestore(g_lock, flags);
2916
2917
2918
2919 case IBLND_INIT_NOTHING:
2920 LASSERT (atomic_read(&net->ibn_nconns) == 0);
2921
2922 if (net->ibn_dev != NULL &&
2923 net->ibn_dev->ibd_nnets == 0)
2924 kiblnd_destroy_dev(net->ibn_dev);
2925
2926 break;
2927 }
2928
2929 CDEBUG(D_MALLOC, "after LND net cleanup: kmem %d\n",
2930 atomic_read(&libcfs_kmemory));
2931
2932 net->ibn_init = IBLND_INIT_NOTHING;
2933 ni->ni_data = NULL;
2934
2935 LIBCFS_FREE(net, sizeof(*net));
2936
2937out:
2938 if (list_empty(&kiblnd_data.kib_devs))
2939 kiblnd_base_shutdown();
2940 return;
2941}
2942
2943int
2944kiblnd_base_startup(void)
2945{
2946 struct kib_sched_info *sched;
2947 int rc;
2948 int i;
2949
2950 LASSERT (kiblnd_data.kib_init == IBLND_INIT_NOTHING);
2951
2952 try_module_get(THIS_MODULE);
2953 memset(&kiblnd_data, 0, sizeof(kiblnd_data));
2954
2955 rwlock_init(&kiblnd_data.kib_global_lock);
2956
2957 INIT_LIST_HEAD(&kiblnd_data.kib_devs);
2958 INIT_LIST_HEAD(&kiblnd_data.kib_failed_devs);
2959
2960 kiblnd_data.kib_peer_hash_size = IBLND_PEER_HASH_SIZE;
2961 LIBCFS_ALLOC(kiblnd_data.kib_peers,
2962 sizeof(struct list_head) *
2963 kiblnd_data.kib_peer_hash_size);
2964 if (kiblnd_data.kib_peers == NULL) {
2965 goto failed;
2966 }
2967 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++)
2968 INIT_LIST_HEAD(&kiblnd_data.kib_peers[i]);
2969
2970 spin_lock_init(&kiblnd_data.kib_connd_lock);
2971 INIT_LIST_HEAD(&kiblnd_data.kib_connd_conns);
2972 INIT_LIST_HEAD(&kiblnd_data.kib_connd_zombies);
2973 init_waitqueue_head(&kiblnd_data.kib_connd_waitq);
2974 init_waitqueue_head(&kiblnd_data.kib_failover_waitq);
2975
2976 kiblnd_data.kib_scheds = cfs_percpt_alloc(lnet_cpt_table(),
2977 sizeof(*sched));
2978 if (kiblnd_data.kib_scheds == NULL)
2979 goto failed;
2980
2981 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
2982 int nthrs;
2983
2984 spin_lock_init(&sched->ibs_lock);
2985 INIT_LIST_HEAD(&sched->ibs_conns);
2986 init_waitqueue_head(&sched->ibs_waitq);
2987
2988 nthrs = cfs_cpt_weight(lnet_cpt_table(), i);
2989 if (*kiblnd_tunables.kib_nscheds > 0) {
2990 nthrs = min(nthrs, *kiblnd_tunables.kib_nscheds);
2991 } else {
2992
2993
2994 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
2995 }
2996
2997 sched->ibs_nthreads_max = nthrs;
2998 sched->ibs_cpt = i;
2999 }
3000
3001 kiblnd_data.kib_error_qpa.qp_state = IB_QPS_ERR;
3002
3003
3004 kiblnd_data.kib_init = IBLND_INIT_DATA;
3005
3006
3007 rc = kiblnd_thread_start(kiblnd_connd, NULL, "kiblnd_connd");
3008 if (rc != 0) {
3009 CERROR("Can't spawn o2iblnd connd: %d\n", rc);
3010 goto failed;
3011 }
3012
3013 if (*kiblnd_tunables.kib_dev_failover != 0)
3014 rc = kiblnd_thread_start(kiblnd_failover_thread, NULL,
3015 "kiblnd_failover");
3016
3017 if (rc != 0) {
3018 CERROR("Can't spawn o2iblnd failover thread: %d\n", rc);
3019 goto failed;
3020 }
3021
3022
3023 kiblnd_data.kib_init = IBLND_INIT_ALL;
3024
3025
3026 return 0;
3027
3028 failed:
3029 kiblnd_base_shutdown();
3030 return -ENETDOWN;
3031}
3032
3033int
3034kiblnd_start_schedulers(struct kib_sched_info *sched)
3035{
3036 int rc = 0;
3037 int nthrs;
3038 int i;
3039
3040 if (sched->ibs_nthreads == 0) {
3041 if (*kiblnd_tunables.kib_nscheds > 0) {
3042 nthrs = sched->ibs_nthreads_max;
3043 } else {
3044 nthrs = cfs_cpt_weight(lnet_cpt_table(),
3045 sched->ibs_cpt);
3046 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
3047 nthrs = min(IBLND_N_SCHED_HIGH, nthrs);
3048 }
3049 } else {
3050 LASSERT(sched->ibs_nthreads <= sched->ibs_nthreads_max);
3051
3052 nthrs = (sched->ibs_nthreads < sched->ibs_nthreads_max);
3053 }
3054
3055 for (i = 0; i < nthrs; i++) {
3056 long id;
3057 char name[20];
3058 id = KIB_THREAD_ID(sched->ibs_cpt, sched->ibs_nthreads + i);
3059 snprintf(name, sizeof(name), "kiblnd_sd_%02ld_%02ld",
3060 KIB_THREAD_CPT(id), KIB_THREAD_TID(id));
3061 rc = kiblnd_thread_start(kiblnd_scheduler, (void *)id, name);
3062 if (rc == 0)
3063 continue;
3064
3065 CERROR("Can't spawn thread %d for scheduler[%d]: %d\n",
3066 sched->ibs_cpt, sched->ibs_nthreads + i, rc);
3067 break;
3068 }
3069
3070 sched->ibs_nthreads += i;
3071 return rc;
3072}
3073
3074int
3075kiblnd_dev_start_threads(kib_dev_t *dev, int newdev, __u32 *cpts, int ncpts)
3076{
3077 int cpt;
3078 int rc;
3079 int i;
3080
3081 for (i = 0; i < ncpts; i++) {
3082 struct kib_sched_info *sched;
3083
3084 cpt = (cpts == NULL) ? i : cpts[i];
3085 sched = kiblnd_data.kib_scheds[cpt];
3086
3087 if (!newdev && sched->ibs_nthreads > 0)
3088 continue;
3089
3090 rc = kiblnd_start_schedulers(kiblnd_data.kib_scheds[cpt]);
3091 if (rc != 0) {
3092 CERROR("Failed to start scheduler threads for %s\n",
3093 dev->ibd_ifname);
3094 return rc;
3095 }
3096 }
3097 return 0;
3098}
3099
3100kib_dev_t *
3101kiblnd_dev_search(char *ifname)
3102{
3103 kib_dev_t *alias = NULL;
3104 kib_dev_t *dev;
3105 char *colon;
3106 char *colon2;
3107
3108 colon = strchr(ifname, ':');
3109 list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) {
3110 if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
3111 return dev;
3112
3113 if (alias != NULL)
3114 continue;
3115
3116 colon2 = strchr(dev->ibd_ifname, ':');
3117 if (colon != NULL)
3118 *colon = 0;
3119 if (colon2 != NULL)
3120 *colon2 = 0;
3121
3122 if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
3123 alias = dev;
3124
3125 if (colon != NULL)
3126 *colon = ':';
3127 if (colon2 != NULL)
3128 *colon2 = ':';
3129 }
3130 return alias;
3131}
3132
3133int
3134kiblnd_startup (lnet_ni_t *ni)
3135{
3136 char *ifname;
3137 kib_dev_t *ibdev = NULL;
3138 kib_net_t *net;
3139 struct timeval tv;
3140 unsigned long flags;
3141 int rc;
3142 int newdev;
3143
3144 LASSERT (ni->ni_lnd == &the_o2iblnd);
3145
3146 if (kiblnd_data.kib_init == IBLND_INIT_NOTHING) {
3147 rc = kiblnd_base_startup();
3148 if (rc != 0)
3149 return rc;
3150 }
3151
3152 LIBCFS_ALLOC(net, sizeof(*net));
3153 ni->ni_data = net;
3154 if (net == NULL)
3155 goto failed;
3156
3157 memset(net, 0, sizeof(*net));
3158
3159 do_gettimeofday(&tv);
3160 net->ibn_incarnation = (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
3161
3162 ni->ni_peertimeout = *kiblnd_tunables.kib_peertimeout;
3163 ni->ni_maxtxcredits = *kiblnd_tunables.kib_credits;
3164 ni->ni_peertxcredits = *kiblnd_tunables.kib_peertxcredits;
3165 ni->ni_peerrtrcredits = *kiblnd_tunables.kib_peerrtrcredits;
3166
3167 if (ni->ni_interfaces[0] != NULL) {
3168
3169
3170 CLASSERT (LNET_MAX_INTERFACES > 1);
3171 if (ni->ni_interfaces[1] != NULL) {
3172 CERROR("Multiple interfaces not supported\n");
3173 goto failed;
3174 }
3175
3176 ifname = ni->ni_interfaces[0];
3177 } else {
3178 ifname = *kiblnd_tunables.kib_default_ipif;
3179 }
3180
3181 if (strlen(ifname) >= sizeof(ibdev->ibd_ifname)) {
3182 CERROR("IPoIB interface name too long: %s\n", ifname);
3183 goto failed;
3184 }
3185
3186 ibdev = kiblnd_dev_search(ifname);
3187
3188 newdev = ibdev == NULL;
3189
3190 if (ibdev == NULL || strcmp(&ibdev->ibd_ifname[0], ifname) != 0)
3191 ibdev = kiblnd_create_dev(ifname);
3192
3193 if (ibdev == NULL)
3194 goto failed;
3195
3196 net->ibn_dev = ibdev;
3197 ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid), ibdev->ibd_ifip);
3198
3199 rc = kiblnd_dev_start_threads(ibdev, newdev,
3200 ni->ni_cpts, ni->ni_ncpts);
3201 if (rc != 0)
3202 goto failed;
3203
3204 rc = kiblnd_net_init_pools(net, ni->ni_cpts, ni->ni_ncpts);
3205 if (rc != 0) {
3206 CERROR("Failed to initialize NI pools: %d\n", rc);
3207 goto failed;
3208 }
3209
3210 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
3211 ibdev->ibd_nnets++;
3212 list_add_tail(&net->ibn_list, &ibdev->ibd_nets);
3213 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
3214
3215 net->ibn_init = IBLND_INIT_ALL;
3216
3217 return 0;
3218
3219failed:
3220 if (net->ibn_dev == NULL && ibdev != NULL)
3221 kiblnd_destroy_dev(ibdev);
3222
3223 kiblnd_shutdown(ni);
3224
3225 CDEBUG(D_NET, "kiblnd_startup failed\n");
3226 return -ENETDOWN;
3227}
3228
3229void __exit
3230kiblnd_module_fini (void)
3231{
3232 lnet_unregister_lnd(&the_o2iblnd);
3233 kiblnd_tunables_fini();
3234}
3235
3236int __init
3237kiblnd_module_init (void)
3238{
3239 int rc;
3240
3241 CLASSERT (sizeof(kib_msg_t) <= IBLND_MSG_SIZE);
3242 CLASSERT (offsetof(kib_msg_t, ibm_u.get.ibgm_rd.rd_frags[IBLND_MAX_RDMA_FRAGS])
3243 <= IBLND_MSG_SIZE);
3244 CLASSERT (offsetof(kib_msg_t, ibm_u.putack.ibpam_rd.rd_frags[IBLND_MAX_RDMA_FRAGS])
3245 <= IBLND_MSG_SIZE);
3246
3247 rc = kiblnd_tunables_init();
3248 if (rc != 0)
3249 return rc;
3250
3251 lnet_register_lnd(&the_o2iblnd);
3252
3253 return 0;
3254}
3255
3256MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
3257MODULE_DESCRIPTION("Kernel OpenIB gen2 LND v2.00");
3258MODULE_LICENSE("GPL");
3259
3260module_init(kiblnd_module_init);
3261module_exit(kiblnd_module_fini);
3262
