4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lnet/klnds/o2iblnd/o2iblnd.c
34 * Author: Eric Barton <eric@bartonsoftware.com>
40 static struct lnet_lnd the_o2iblnd;
42 kib_data_t kiblnd_data;
45 kiblnd_cksum (void *ptr, int nob)
51 sum = ((sum << 1) | (sum >> 31)) + *c++;
53 /* ensure I don't return 0 (== no checksum) */
54 return (sum == 0) ? 1 : sum;
58 kiblnd_msgtype2str(int type)
61 case IBLND_MSG_CONNREQ:
64 case IBLND_MSG_CONNACK:
70 case IBLND_MSG_IMMEDIATE:
73 case IBLND_MSG_PUT_REQ:
76 case IBLND_MSG_PUT_NAK:
79 case IBLND_MSG_PUT_ACK:
82 case IBLND_MSG_PUT_DONE:
85 case IBLND_MSG_GET_REQ:
88 case IBLND_MSG_GET_DONE:
97 kiblnd_msgtype2size(int type)
99 const int hdr_size = offsetof(kib_msg_t, ibm_u);
102 case IBLND_MSG_CONNREQ:
103 case IBLND_MSG_CONNACK:
104 return hdr_size + sizeof(kib_connparams_t);
109 case IBLND_MSG_IMMEDIATE:
110 return offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[0]);
112 case IBLND_MSG_PUT_REQ:
113 return hdr_size + sizeof(kib_putreq_msg_t);
115 case IBLND_MSG_PUT_ACK:
116 return hdr_size + sizeof(kib_putack_msg_t);
118 case IBLND_MSG_GET_REQ:
119 return hdr_size + sizeof(kib_get_msg_t);
121 case IBLND_MSG_PUT_NAK:
122 case IBLND_MSG_PUT_DONE:
123 case IBLND_MSG_GET_DONE:
124 return hdr_size + sizeof(kib_completion_msg_t);
131 kiblnd_unpack_rd(kib_msg_t *msg, int flip)
138 LASSERT (msg->ibm_type == IBLND_MSG_GET_REQ ||
139 msg->ibm_type == IBLND_MSG_PUT_ACK);
141 rd = msg->ibm_type == IBLND_MSG_GET_REQ ?
142 &msg->ibm_u.get.ibgm_rd :
143 &msg->ibm_u.putack.ibpam_rd;
146 __swab32s(&rd->rd_key);
147 __swab32s(&rd->rd_nfrags);
152 if (n <= 0 || n > IBLND_MAX_RDMA_FRAGS) {
153 CERROR("Bad nfrags: %d, should be 0 < n <= %d\n",
154 n, IBLND_MAX_RDMA_FRAGS);
158 nob = offsetof (kib_msg_t, ibm_u) +
159 kiblnd_rd_msg_size(rd, msg->ibm_type, n);
161 if (msg->ibm_nob < nob) {
162 CERROR("Short %s: %d(%d)\n",
163 kiblnd_msgtype2str(msg->ibm_type), msg->ibm_nob, nob);
170 for (i = 0; i < n; i++) {
171 __swab32s(&rd->rd_frags[i].rf_nob);
172 __swab64s(&rd->rd_frags[i].rf_addr);
179 kiblnd_pack_msg(struct lnet_ni *ni, kib_msg_t *msg, int version,
180 int credits, lnet_nid_t dstnid, __u64 dststamp)
182 kib_net_t *net = ni->ni_data;
184 /* CAVEAT EMPTOR! all message fields not set here should have been
185 * initialised previously. */
186 msg->ibm_magic = IBLND_MSG_MAGIC;
187 msg->ibm_version = version;
189 msg->ibm_credits = credits;
192 msg->ibm_srcnid = ni->ni_nid;
193 msg->ibm_srcstamp = net->ibn_incarnation;
194 msg->ibm_dstnid = dstnid;
195 msg->ibm_dststamp = dststamp;
197 if (*kiblnd_tunables.kib_cksum) {
198 /* NB ibm_cksum zero while computing cksum */
199 msg->ibm_cksum = kiblnd_cksum(msg, msg->ibm_nob);
204 kiblnd_unpack_msg(kib_msg_t *msg, int nob)
206 const int hdr_size = offsetof(kib_msg_t, ibm_u);
212 /* 6 bytes are enough to have received magic + version */
214 CERROR("Short message: %d\n", nob);
218 if (msg->ibm_magic == IBLND_MSG_MAGIC) {
220 } else if (msg->ibm_magic == __swab32(IBLND_MSG_MAGIC)) {
223 CERROR("Bad magic: %08x\n", msg->ibm_magic);
227 version = flip ? __swab16(msg->ibm_version) : msg->ibm_version;
228 if (version != IBLND_MSG_VERSION &&
229 version != IBLND_MSG_VERSION_1) {
230 CERROR("Bad version: %x\n", version);
234 if (nob < hdr_size) {
235 CERROR("Short message: %d\n", nob);
239 msg_nob = flip ? __swab32(msg->ibm_nob) : msg->ibm_nob;
241 CERROR("Short message: got %d, wanted %d\n", nob, msg_nob);
245 /* checksum must be computed with ibm_cksum zero and BEFORE anything
247 msg_cksum = flip ? __swab32(msg->ibm_cksum) : msg->ibm_cksum;
249 if (msg_cksum != 0 &&
250 msg_cksum != kiblnd_cksum(msg, msg_nob)) {
251 CERROR("Bad checksum\n");
255 msg->ibm_cksum = msg_cksum;
258 /* leave magic unflipped as a clue to peer_ni endianness */
259 msg->ibm_version = version;
260 CLASSERT (sizeof(msg->ibm_type) == 1);
261 CLASSERT (sizeof(msg->ibm_credits) == 1);
262 msg->ibm_nob = msg_nob;
263 __swab64s(&msg->ibm_srcnid);
264 __swab64s(&msg->ibm_srcstamp);
265 __swab64s(&msg->ibm_dstnid);
266 __swab64s(&msg->ibm_dststamp);
269 if (msg->ibm_srcnid == LNET_NID_ANY) {
270 CERROR("Bad src nid: %s\n", libcfs_nid2str(msg->ibm_srcnid));
274 if (msg_nob < kiblnd_msgtype2size(msg->ibm_type)) {
275 CERROR("Short %s: %d(%d)\n", kiblnd_msgtype2str(msg->ibm_type),
276 msg_nob, kiblnd_msgtype2size(msg->ibm_type));
280 switch (msg->ibm_type) {
282 CERROR("Unknown message type %x\n", msg->ibm_type);
286 case IBLND_MSG_IMMEDIATE:
287 case IBLND_MSG_PUT_REQ:
290 case IBLND_MSG_PUT_ACK:
291 case IBLND_MSG_GET_REQ:
292 if (kiblnd_unpack_rd(msg, flip))
296 case IBLND_MSG_PUT_NAK:
297 case IBLND_MSG_PUT_DONE:
298 case IBLND_MSG_GET_DONE:
300 __swab32s(&msg->ibm_u.completion.ibcm_status);
303 case IBLND_MSG_CONNREQ:
304 case IBLND_MSG_CONNACK:
306 __swab16s(&msg->ibm_u.connparams.ibcp_queue_depth);
307 __swab16s(&msg->ibm_u.connparams.ibcp_max_frags);
308 __swab32s(&msg->ibm_u.connparams.ibcp_max_msg_size);
316 kiblnd_create_peer(struct lnet_ni *ni, kib_peer_ni_t **peerp, lnet_nid_t nid)
318 kib_peer_ni_t *peer_ni;
319 kib_net_t *net = ni->ni_data;
320 int cpt = lnet_cpt_of_nid(nid, ni);
323 LASSERT(net != NULL);
324 LASSERT(nid != LNET_NID_ANY);
326 LIBCFS_CPT_ALLOC(peer_ni, lnet_cpt_table(), cpt, sizeof(*peer_ni));
327 if (peer_ni == NULL) {
328 CERROR("Cannot allocate peer_ni\n");
332 peer_ni->ibp_ni = ni;
333 peer_ni->ibp_nid = nid;
334 peer_ni->ibp_error = 0;
335 peer_ni->ibp_last_alive = 0;
336 peer_ni->ibp_max_frags = IBLND_MAX_RDMA_FRAGS;
337 peer_ni->ibp_queue_depth = ni->ni_net->net_tunables.lct_peer_tx_credits;
338 atomic_set(&peer_ni->ibp_refcount, 1); /* 1 ref for caller */
340 INIT_LIST_HEAD(&peer_ni->ibp_list); /* not in the peer_ni table yet */
341 INIT_LIST_HEAD(&peer_ni->ibp_conns);
342 INIT_LIST_HEAD(&peer_ni->ibp_tx_queue);
344 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
346 /* always called with a ref on ni, which prevents ni being shutdown */
347 LASSERT(net->ibn_shutdown == 0);
349 /* npeers only grows with the global lock held */
350 atomic_inc(&net->ibn_npeers);
352 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
359 kiblnd_destroy_peer (kib_peer_ni_t *peer_ni)
361 kib_net_t *net = peer_ni->ibp_ni->ni_data;
363 LASSERT(net != NULL);
364 LASSERT (atomic_read(&peer_ni->ibp_refcount) == 0);
365 LASSERT(!kiblnd_peer_active(peer_ni));
366 LASSERT(kiblnd_peer_idle(peer_ni));
367 LASSERT(list_empty(&peer_ni->ibp_tx_queue));
369 LIBCFS_FREE(peer_ni, sizeof(*peer_ni));
371 /* NB a peer_ni's connections keep a reference on their peer_ni until
372 * they are destroyed, so we can be assured that _all_ state to do
373 * with this peer_ni has been cleaned up when its refcount drops to
375 atomic_dec(&net->ibn_npeers);
379 kiblnd_find_peer_locked(struct lnet_ni *ni, lnet_nid_t nid)
381 /* the caller is responsible for accounting the additional reference
382 * that this creates */
383 struct list_head *peer_list = kiblnd_nid2peerlist(nid);
384 struct list_head *tmp;
385 kib_peer_ni_t *peer_ni;
387 list_for_each(tmp, peer_list) {
389 peer_ni = list_entry(tmp, kib_peer_ni_t, ibp_list);
390 LASSERT(!kiblnd_peer_idle(peer_ni));
393 * Match a peer if its NID and the NID of the local NI it
394 * communicates over are the same. Otherwise don't match
395 * the peer, which will result in a new lnd peer being
398 if (peer_ni->ibp_nid != nid ||
399 peer_ni->ibp_ni->ni_nid != ni->ni_nid)
402 CDEBUG(D_NET, "got peer_ni [%p] -> %s (%d) version: %x\n",
403 peer_ni, libcfs_nid2str(nid),
404 atomic_read(&peer_ni->ibp_refcount),
405 peer_ni->ibp_version);
412 kiblnd_unlink_peer_locked (kib_peer_ni_t *peer_ni)
414 LASSERT(list_empty(&peer_ni->ibp_conns));
416 LASSERT (kiblnd_peer_active(peer_ni));
417 list_del_init(&peer_ni->ibp_list);
418 /* lose peerlist's ref */
419 kiblnd_peer_decref(peer_ni);
423 kiblnd_get_peer_info(struct lnet_ni *ni, int index,
424 lnet_nid_t *nidp, int *count)
426 kib_peer_ni_t *peer_ni;
427 struct list_head *ptmp;
431 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
433 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
435 list_for_each(ptmp, &kiblnd_data.kib_peers[i]) {
437 peer_ni = list_entry(ptmp, kib_peer_ni_t, ibp_list);
438 LASSERT(!kiblnd_peer_idle(peer_ni));
440 if (peer_ni->ibp_ni != ni)
446 *nidp = peer_ni->ibp_nid;
447 *count = atomic_read(&peer_ni->ibp_refcount);
449 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
455 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
460 kiblnd_del_peer_locked (kib_peer_ni_t *peer_ni)
462 struct list_head *ctmp;
463 struct list_head *cnxt;
466 if (list_empty(&peer_ni->ibp_conns)) {
467 kiblnd_unlink_peer_locked(peer_ni);
469 list_for_each_safe(ctmp, cnxt, &peer_ni->ibp_conns) {
470 conn = list_entry(ctmp, kib_conn_t, ibc_list);
472 kiblnd_close_conn_locked(conn, 0);
474 /* NB closing peer_ni's last conn unlinked it. */
476 /* NB peer_ni now unlinked; might even be freed if the peer_ni table had the
481 kiblnd_del_peer(struct lnet_ni *ni, lnet_nid_t nid)
483 struct list_head zombies = LIST_HEAD_INIT(zombies);
484 struct list_head *ptmp;
485 struct list_head *pnxt;
486 kib_peer_ni_t *peer_ni;
493 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
495 if (nid != LNET_NID_ANY) {
496 lo = hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
499 hi = kiblnd_data.kib_peer_hash_size - 1;
502 for (i = lo; i <= hi; i++) {
503 list_for_each_safe(ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
504 peer_ni = list_entry(ptmp, kib_peer_ni_t, ibp_list);
505 LASSERT(!kiblnd_peer_idle(peer_ni));
507 if (peer_ni->ibp_ni != ni)
510 if (!(nid == LNET_NID_ANY || peer_ni->ibp_nid == nid))
513 if (!list_empty(&peer_ni->ibp_tx_queue)) {
514 LASSERT(list_empty(&peer_ni->ibp_conns));
516 list_splice_init(&peer_ni->ibp_tx_queue,
520 kiblnd_del_peer_locked(peer_ni);
521 rc = 0; /* matched something */
525 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
527 kiblnd_txlist_done(&zombies, -EIO);
533 kiblnd_get_conn_by_idx(struct lnet_ni *ni, int index)
535 kib_peer_ni_t *peer_ni;
536 struct list_head *ptmp;
538 struct list_head *ctmp;
542 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
544 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
545 list_for_each(ptmp, &kiblnd_data.kib_peers[i]) {
547 peer_ni = list_entry(ptmp, kib_peer_ni_t, ibp_list);
548 LASSERT(!kiblnd_peer_idle(peer_ni));
550 if (peer_ni->ibp_ni != ni)
553 list_for_each(ctmp, &peer_ni->ibp_conns) {
557 conn = list_entry(ctmp, kib_conn_t, ibc_list);
558 kiblnd_conn_addref(conn);
559 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
566 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
571 kiblnd_debug_rx (kib_rx_t *rx)
573 CDEBUG(D_CONSOLE, " %p status %d msg_type %x cred %d\n",
574 rx, rx->rx_status, rx->rx_msg->ibm_type,
575 rx->rx_msg->ibm_credits);
579 kiblnd_debug_tx (kib_tx_t *tx)
581 CDEBUG(D_CONSOLE, " %p snd %d q %d w %d rc %d dl %lld "
582 "cookie %#llx msg %s%s type %x cred %d\n",
583 tx, tx->tx_sending, tx->tx_queued, tx->tx_waiting,
584 tx->tx_status, ktime_to_ns(tx->tx_deadline), tx->tx_cookie,
585 tx->tx_lntmsg[0] == NULL ? "-" : "!",
586 tx->tx_lntmsg[1] == NULL ? "-" : "!",
587 tx->tx_msg->ibm_type, tx->tx_msg->ibm_credits);
591 kiblnd_debug_conn (kib_conn_t *conn)
593 struct list_head *tmp;
596 spin_lock(&conn->ibc_lock);
598 CDEBUG(D_CONSOLE, "conn[%d] %p [version %x] -> %s:\n",
599 atomic_read(&conn->ibc_refcount), conn,
600 conn->ibc_version, libcfs_nid2str(conn->ibc_peer->ibp_nid));
601 CDEBUG(D_CONSOLE, " state %d nposted %d/%d cred %d o_cred %d "
602 " r_cred %d\n", conn->ibc_state, conn->ibc_noops_posted,
603 conn->ibc_nsends_posted, conn->ibc_credits,
604 conn->ibc_outstanding_credits, conn->ibc_reserved_credits);
605 CDEBUG(D_CONSOLE, " comms_err %d\n", conn->ibc_comms_error);
607 CDEBUG(D_CONSOLE, " tx_noops:\n");
608 list_for_each(tmp, &conn->ibc_tx_noops)
609 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
611 CDEBUG(D_CONSOLE, " tx_queue_nocred:\n");
612 list_for_each(tmp, &conn->ibc_tx_queue_nocred)
613 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
615 CDEBUG(D_CONSOLE, " tx_queue_rsrvd:\n");
616 list_for_each(tmp, &conn->ibc_tx_queue_rsrvd)
617 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
619 CDEBUG(D_CONSOLE, " tx_queue:\n");
620 list_for_each(tmp, &conn->ibc_tx_queue)
621 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
623 CDEBUG(D_CONSOLE, " active_txs:\n");
624 list_for_each(tmp, &conn->ibc_active_txs)
625 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
627 CDEBUG(D_CONSOLE, " rxs:\n");
628 for (i = 0; i < IBLND_RX_MSGS(conn); i++)
629 kiblnd_debug_rx(&conn->ibc_rxs[i]);
631 spin_unlock(&conn->ibc_lock);
635 kiblnd_translate_mtu(int value)
656 kiblnd_setup_mtu_locked(struct rdma_cm_id *cmid)
660 /* XXX There is no path record for iWARP, set by netdev->change_mtu? */
661 if (cmid->route.path_rec == NULL)
664 mtu = kiblnd_translate_mtu(*kiblnd_tunables.kib_ib_mtu);
667 cmid->route.path_rec->mtu = mtu;
671 kiblnd_get_completion_vector(kib_conn_t *conn, int cpt)
679 vectors = conn->ibc_cmid->device->num_comp_vectors;
683 mask = cfs_cpt_cpumask(lnet_cpt_table(), cpt);
685 /* hash NID to CPU id in this partition... */
686 ibp_nid = conn->ibc_peer->ibp_nid;
687 off = do_div(ibp_nid, cpumask_weight(mask));
688 for_each_cpu(i, mask) {
698 * Get the scheduler bound to this CPT. If the scheduler has no
699 * threads, which means that the CPT has no CPUs, then grab the
700 * next scheduler that we can use.
702 * This case would be triggered if a NUMA node is configured with
703 * no associated CPUs.
705 static struct kib_sched_info *
706 kiblnd_get_scheduler(int cpt)
708 struct kib_sched_info *sched;
711 sched = kiblnd_data.kib_scheds[cpt];
713 if (sched->ibs_nthreads > 0)
716 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
717 if (sched->ibs_nthreads > 0) {
718 CDEBUG(D_NET, "scheduler[%d] has no threads. selected scheduler[%d]\n",
719 cpt, sched->ibs_cpt);
727 static unsigned int kiblnd_send_wrs(struct kib_conn *conn)
730 * One WR for the LNet message
731 * And ibc_max_frags for the transfer WRs
733 unsigned int ret = 1 + conn->ibc_max_frags;
734 __u32 dev_caps = conn->ibc_hdev->ibh_dev->ibd_dev_caps;
736 /* FastReg needs two extra WRs for map and invalidate */
737 if (dev_caps & IBLND_DEV_CAPS_FASTREG_ENABLED)
740 /* account for a maximum of ibc_queue_depth in-flight transfers */
741 ret *= conn->ibc_queue_depth;
746 kiblnd_create_conn(kib_peer_ni_t *peer_ni, struct rdma_cm_id *cmid,
747 int state, int version)
750 * If the new conn is created successfully it takes over the caller's
751 * ref on 'peer_ni'. It also "owns" 'cmid' and destroys it when it itself
752 * is destroyed. On failure, the caller's ref on 'peer_ni' remains and
753 * she must dispose of 'cmid'. (Actually I'd block forever if I tried
754 * to destroy 'cmid' here since I'm called from the CM which still has
755 * its ref on 'cmid'). */
756 rwlock_t *glock = &kiblnd_data.kib_global_lock;
757 kib_net_t *net = peer_ni->ibp_ni->ni_data;
759 struct ib_qp_init_attr *init_qp_attr;
760 struct kib_sched_info *sched;
761 #ifdef HAVE_IB_CQ_INIT_ATTR
762 struct ib_cq_init_attr cq_attr = {};
771 LASSERT(net != NULL);
772 LASSERT(!in_interrupt());
776 cpt = lnet_cpt_of_nid(peer_ni->ibp_nid, peer_ni->ibp_ni);
777 sched = kiblnd_get_scheduler(cpt);
780 CERROR("no schedulers available. node is unhealthy\n");
785 * The cpt might have changed if we ended up selecting a non cpt
786 * native scheduler. So use the scheduler's cpt instead.
788 cpt = sched->ibs_cpt;
790 LIBCFS_CPT_ALLOC(init_qp_attr, lnet_cpt_table(), cpt,
791 sizeof(*init_qp_attr));
792 if (init_qp_attr == NULL) {
793 CERROR("Can't allocate qp_attr for %s\n",
794 libcfs_nid2str(peer_ni->ibp_nid));
798 LIBCFS_CPT_ALLOC(conn, lnet_cpt_table(), cpt, sizeof(*conn));
800 CERROR("Can't allocate connection for %s\n",
801 libcfs_nid2str(peer_ni->ibp_nid));
805 conn->ibc_state = IBLND_CONN_INIT;
806 conn->ibc_version = version;
807 conn->ibc_peer = peer_ni; /* I take the caller's ref */
808 cmid->context = conn; /* for future CM callbacks */
809 conn->ibc_cmid = cmid;
810 conn->ibc_max_frags = peer_ni->ibp_max_frags;
811 conn->ibc_queue_depth = peer_ni->ibp_queue_depth;
813 INIT_LIST_HEAD(&conn->ibc_tx_noops);
814 INIT_LIST_HEAD(&conn->ibc_tx_queue);
815 INIT_LIST_HEAD(&conn->ibc_tx_queue_rsrvd);
816 INIT_LIST_HEAD(&conn->ibc_tx_queue_nocred);
817 INIT_LIST_HEAD(&conn->ibc_active_txs);
818 spin_lock_init(&conn->ibc_lock);
820 LIBCFS_CPT_ALLOC(conn->ibc_connvars, lnet_cpt_table(), cpt,
821 sizeof(*conn->ibc_connvars));
822 if (conn->ibc_connvars == NULL) {
823 CERROR("Can't allocate in-progress connection state\n");
827 write_lock_irqsave(glock, flags);
828 if (dev->ibd_failover) {
829 write_unlock_irqrestore(glock, flags);
830 CERROR("%s: failover in progress\n", dev->ibd_ifname);
834 if (dev->ibd_hdev->ibh_ibdev != cmid->device) {
835 /* wakeup failover thread and teardown connection */
836 if (kiblnd_dev_can_failover(dev)) {
837 list_add_tail(&dev->ibd_fail_list,
838 &kiblnd_data.kib_failed_devs);
839 wake_up(&kiblnd_data.kib_failover_waitq);
842 write_unlock_irqrestore(glock, flags);
843 CERROR("cmid HCA(%s), kib_dev(%s) need failover\n",
844 cmid->device->name, dev->ibd_ifname);
848 kiblnd_hdev_addref_locked(dev->ibd_hdev);
849 conn->ibc_hdev = dev->ibd_hdev;
851 kiblnd_setup_mtu_locked(cmid);
853 write_unlock_irqrestore(glock, flags);
855 LIBCFS_CPT_ALLOC(conn->ibc_rxs, lnet_cpt_table(), cpt,
856 IBLND_RX_MSGS(conn) * sizeof(kib_rx_t));
857 if (conn->ibc_rxs == NULL) {
858 CERROR("Cannot allocate RX buffers\n");
862 rc = kiblnd_alloc_pages(&conn->ibc_rx_pages, cpt,
863 IBLND_RX_MSG_PAGES(conn));
867 kiblnd_map_rx_descs(conn);
869 #ifdef HAVE_IB_CQ_INIT_ATTR
870 cq_attr.cqe = IBLND_CQ_ENTRIES(conn);
871 cq_attr.comp_vector = kiblnd_get_completion_vector(conn, cpt);
872 cq = ib_create_cq(cmid->device,
873 kiblnd_cq_completion, kiblnd_cq_event, conn,
876 cq = ib_create_cq(cmid->device,
877 kiblnd_cq_completion, kiblnd_cq_event, conn,
878 IBLND_CQ_ENTRIES(conn),
879 kiblnd_get_completion_vector(conn, cpt));
883 * on MLX-5 (possibly MLX-4 as well) this error could be
884 * hit if the concurrent_sends and/or peer_tx_credits is set
885 * too high. Or due to an MLX-5 bug which tries to
886 * allocate 256kb via kmalloc for WR cookie array
888 CERROR("Failed to create CQ with %d CQEs: %ld\n",
889 IBLND_CQ_ENTRIES(conn), PTR_ERR(cq));
895 rc = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
897 CERROR("Can't request completion notification: %d\n", rc);
901 init_qp_attr->event_handler = kiblnd_qp_event;
902 init_qp_attr->qp_context = conn;
903 init_qp_attr->cap.max_send_sge = *kiblnd_tunables.kib_wrq_sge;
904 init_qp_attr->cap.max_recv_sge = 1;
905 init_qp_attr->sq_sig_type = IB_SIGNAL_REQ_WR;
906 init_qp_attr->qp_type = IB_QPT_RC;
907 init_qp_attr->send_cq = cq;
908 init_qp_attr->recv_cq = cq;
910 conn->ibc_sched = sched;
913 init_qp_attr->cap.max_send_wr = kiblnd_send_wrs(conn);
914 init_qp_attr->cap.max_recv_wr = IBLND_RECV_WRS(conn);
916 rc = rdma_create_qp(cmid, conn->ibc_hdev->ibh_pd, init_qp_attr);
917 if (!rc || conn->ibc_queue_depth < 2)
920 conn->ibc_queue_depth--;
924 CERROR("Can't create QP: %d, send_wr: %d, recv_wr: %d, "
925 "send_sge: %d, recv_sge: %d\n",
926 rc, init_qp_attr->cap.max_send_wr,
927 init_qp_attr->cap.max_recv_wr,
928 init_qp_attr->cap.max_send_sge,
929 init_qp_attr->cap.max_recv_sge);
933 if (conn->ibc_queue_depth != peer_ni->ibp_queue_depth)
934 CWARN("peer %s - queue depth reduced from %u to %u"
935 " to allow for qp creation\n",
936 libcfs_nid2str(peer_ni->ibp_nid),
937 peer_ni->ibp_queue_depth,
938 conn->ibc_queue_depth);
940 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
942 /* 1 ref for caller and each rxmsg */
943 atomic_set(&conn->ibc_refcount, 1 + IBLND_RX_MSGS(conn));
944 conn->ibc_nrx = IBLND_RX_MSGS(conn);
947 for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
948 rc = kiblnd_post_rx(&conn->ibc_rxs[i], IBLND_POSTRX_NO_CREDIT);
950 CERROR("Can't post rxmsg: %d\n", rc);
952 /* Make posted receives complete */
953 kiblnd_abort_receives(conn);
955 /* correct # of posted buffers
956 * NB locking needed now I'm racing with completion */
957 spin_lock_irqsave(&sched->ibs_lock, flags);
958 conn->ibc_nrx -= IBLND_RX_MSGS(conn) - i;
959 spin_unlock_irqrestore(&sched->ibs_lock, flags);
961 /* cmid will be destroyed by CM(ofed) after cm_callback
962 * returned, so we can't refer it anymore
963 * (by kiblnd_connd()->kiblnd_destroy_conn) */
964 rdma_destroy_qp(conn->ibc_cmid);
965 conn->ibc_cmid = NULL;
967 /* Drop my own and unused rxbuffer refcounts */
968 while (i++ <= IBLND_RX_MSGS(conn))
969 kiblnd_conn_decref(conn);
975 /* Init successful! */
976 LASSERT (state == IBLND_CONN_ACTIVE_CONNECT ||
977 state == IBLND_CONN_PASSIVE_WAIT);
978 conn->ibc_state = state;
981 atomic_inc(&net->ibn_nconns);
985 kiblnd_destroy_conn(conn, true);
987 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
993 kiblnd_destroy_conn(kib_conn_t *conn, bool free_conn)
995 struct rdma_cm_id *cmid = conn->ibc_cmid;
996 kib_peer_ni_t *peer_ni = conn->ibc_peer;
999 LASSERT (!in_interrupt());
1000 LASSERT (atomic_read(&conn->ibc_refcount) == 0);
1001 LASSERT(list_empty(&conn->ibc_tx_noops));
1002 LASSERT(list_empty(&conn->ibc_tx_queue));
1003 LASSERT(list_empty(&conn->ibc_tx_queue_rsrvd));
1004 LASSERT(list_empty(&conn->ibc_tx_queue_nocred));
1005 LASSERT(list_empty(&conn->ibc_active_txs));
1006 LASSERT (conn->ibc_noops_posted == 0);
1007 LASSERT (conn->ibc_nsends_posted == 0);
1009 switch (conn->ibc_state) {
1011 /* conn must be completely disengaged from the network */
1014 case IBLND_CONN_DISCONNECTED:
1015 /* connvars should have been freed already */
1016 LASSERT (conn->ibc_connvars == NULL);
1019 case IBLND_CONN_INIT:
1023 /* conn->ibc_cmid might be destroyed by CM already */
1024 if (cmid != NULL && cmid->qp != NULL)
1025 rdma_destroy_qp(cmid);
1027 if (conn->ibc_cq != NULL) {
1028 rc = ib_destroy_cq(conn->ibc_cq);
1030 CWARN("Error destroying CQ: %d\n", rc);
1033 if (conn->ibc_rx_pages != NULL)
1034 kiblnd_unmap_rx_descs(conn);
1036 if (conn->ibc_rxs != NULL) {
1037 LIBCFS_FREE(conn->ibc_rxs,
1038 IBLND_RX_MSGS(conn) * sizeof(kib_rx_t));
1041 if (conn->ibc_connvars != NULL)
1042 LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
1044 if (conn->ibc_hdev != NULL)
1045 kiblnd_hdev_decref(conn->ibc_hdev);
1047 /* See CAVEAT EMPTOR above in kiblnd_create_conn */
1048 if (conn->ibc_state != IBLND_CONN_INIT) {
1049 kib_net_t *net = peer_ni->ibp_ni->ni_data;
1051 kiblnd_peer_decref(peer_ni);
1052 rdma_destroy_id(cmid);
1053 atomic_dec(&net->ibn_nconns);
1057 LIBCFS_FREE(conn, sizeof(*conn));
1061 kiblnd_close_peer_conns_locked(kib_peer_ni_t *peer_ni, int why)
1064 struct list_head *ctmp;
1065 struct list_head *cnxt;
1068 list_for_each_safe(ctmp, cnxt, &peer_ni->ibp_conns) {
1069 conn = list_entry(ctmp, kib_conn_t, ibc_list);
1071 CDEBUG(D_NET, "Closing conn -> %s, "
1072 "version: %x, reason: %d\n",
1073 libcfs_nid2str(peer_ni->ibp_nid),
1074 conn->ibc_version, why);
1076 kiblnd_close_conn_locked(conn, why);
1084 kiblnd_close_stale_conns_locked(kib_peer_ni_t *peer_ni,
1085 int version, __u64 incarnation)
1088 struct list_head *ctmp;
1089 struct list_head *cnxt;
1092 list_for_each_safe(ctmp, cnxt, &peer_ni->ibp_conns) {
1093 conn = list_entry(ctmp, kib_conn_t, ibc_list);
1095 if (conn->ibc_version == version &&
1096 conn->ibc_incarnation == incarnation)
1099 CDEBUG(D_NET, "Closing stale conn -> %s version: %x, "
1100 "incarnation:%#llx(%x, %#llx)\n",
1101 libcfs_nid2str(peer_ni->ibp_nid),
1102 conn->ibc_version, conn->ibc_incarnation,
1103 version, incarnation);
1105 kiblnd_close_conn_locked(conn, -ESTALE);
1113 kiblnd_close_matching_conns(struct lnet_ni *ni, lnet_nid_t nid)
1115 kib_peer_ni_t *peer_ni;
1116 struct list_head *ptmp;
1117 struct list_head *pnxt;
1121 unsigned long flags;
1124 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1126 if (nid != LNET_NID_ANY)
1127 lo = hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
1130 hi = kiblnd_data.kib_peer_hash_size - 1;
1133 for (i = lo; i <= hi; i++) {
1134 list_for_each_safe(ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
1136 peer_ni = list_entry(ptmp, kib_peer_ni_t, ibp_list);
1137 LASSERT(!kiblnd_peer_idle(peer_ni));
1139 if (peer_ni->ibp_ni != ni)
1142 if (!(nid == LNET_NID_ANY || nid == peer_ni->ibp_nid))
1145 count += kiblnd_close_peer_conns_locked(peer_ni, 0);
1149 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1151 /* wildcards always succeed */
1152 if (nid == LNET_NID_ANY)
1155 return (count == 0) ? -ENOENT : 0;
1159 kiblnd_ctl(struct lnet_ni *ni, unsigned int cmd, void *arg)
1161 struct libcfs_ioctl_data *data = arg;
1165 case IOC_LIBCFS_GET_PEER: {
1169 rc = kiblnd_get_peer_info(ni, data->ioc_count,
1171 data->ioc_nid = nid;
1172 data->ioc_count = count;
1176 case IOC_LIBCFS_DEL_PEER: {
1177 rc = kiblnd_del_peer(ni, data->ioc_nid);
1180 case IOC_LIBCFS_GET_CONN: {
1184 conn = kiblnd_get_conn_by_idx(ni, data->ioc_count);
1190 LASSERT(conn->ibc_cmid != NULL);
1191 data->ioc_nid = conn->ibc_peer->ibp_nid;
1192 if (conn->ibc_cmid->route.path_rec == NULL)
1193 data->ioc_u32[0] = 0; /* iWarp has no path MTU */
1196 ib_mtu_enum_to_int(conn->ibc_cmid->route.path_rec->mtu);
1197 kiblnd_conn_decref(conn);
1200 case IOC_LIBCFS_CLOSE_CONNECTION: {
1201 rc = kiblnd_close_matching_conns(ni, data->ioc_nid);
1213 kiblnd_query(struct lnet_ni *ni, lnet_nid_t nid, time64_t *when)
1215 time64_t last_alive = 0;
1216 time64_t now = ktime_get_seconds();
1217 rwlock_t *glock = &kiblnd_data.kib_global_lock;
1218 kib_peer_ni_t *peer_ni;
1219 unsigned long flags;
1221 read_lock_irqsave(glock, flags);
1223 peer_ni = kiblnd_find_peer_locked(ni, nid);
1224 if (peer_ni != NULL)
1225 last_alive = peer_ni->ibp_last_alive;
1227 read_unlock_irqrestore(glock, flags);
1229 if (last_alive != 0)
1232 /* peer_ni is not persistent in hash, trigger peer_ni creation
1233 * and connection establishment with a NULL tx */
1234 if (peer_ni == NULL)
1235 kiblnd_launch_tx(ni, NULL, nid);
1237 CDEBUG(D_NET, "peer_ni %s %p, alive %lld secs ago\n",
1238 libcfs_nid2str(nid), peer_ni,
1239 last_alive ? now - last_alive : -1);
1244 kiblnd_free_pages(kib_pages_t *p)
1246 int npages = p->ibp_npages;
1249 for (i = 0; i < npages; i++) {
1250 if (p->ibp_pages[i] != NULL)
1251 __free_page(p->ibp_pages[i]);
1254 LIBCFS_FREE(p, offsetof(kib_pages_t, ibp_pages[npages]));
1258 kiblnd_alloc_pages(kib_pages_t **pp, int cpt, int npages)
1263 LIBCFS_CPT_ALLOC(p, lnet_cpt_table(), cpt,
1264 offsetof(kib_pages_t, ibp_pages[npages]));
1266 CERROR("Can't allocate descriptor for %d pages\n", npages);
1270 memset(p, 0, offsetof(kib_pages_t, ibp_pages[npages]));
1271 p->ibp_npages = npages;
1273 for (i = 0; i < npages; i++) {
1274 p->ibp_pages[i] = cfs_page_cpt_alloc(lnet_cpt_table(), cpt,
1276 if (p->ibp_pages[i] == NULL) {
1277 CERROR("Can't allocate page %d of %d\n", i, npages);
1278 kiblnd_free_pages(p);
1288 kiblnd_unmap_rx_descs(kib_conn_t *conn)
1293 LASSERT (conn->ibc_rxs != NULL);
1294 LASSERT (conn->ibc_hdev != NULL);
1296 for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
1297 rx = &conn->ibc_rxs[i];
1299 LASSERT(rx->rx_nob >= 0); /* not posted */
1301 kiblnd_dma_unmap_single(conn->ibc_hdev->ibh_ibdev,
1302 KIBLND_UNMAP_ADDR(rx, rx_msgunmap,
1304 IBLND_MSG_SIZE, DMA_FROM_DEVICE);
1307 kiblnd_free_pages(conn->ibc_rx_pages);
1309 conn->ibc_rx_pages = NULL;
1313 kiblnd_map_rx_descs(kib_conn_t *conn)
1321 for (pg_off = ipg = i = 0; i < IBLND_RX_MSGS(conn); i++) {
1322 pg = conn->ibc_rx_pages->ibp_pages[ipg];
1323 rx = &conn->ibc_rxs[i];
1326 rx->rx_msg = (kib_msg_t *)(((char *)page_address(pg)) + pg_off);
1329 kiblnd_dma_map_single(conn->ibc_hdev->ibh_ibdev,
1330 rx->rx_msg, IBLND_MSG_SIZE,
1332 LASSERT(!kiblnd_dma_mapping_error(conn->ibc_hdev->ibh_ibdev,
1334 KIBLND_UNMAP_ADDR_SET(rx, rx_msgunmap, rx->rx_msgaddr);
1336 CDEBUG(D_NET, "rx %d: %p %#llx(%#llx)\n",
1337 i, rx->rx_msg, rx->rx_msgaddr,
1338 (__u64)(page_to_phys(pg) + pg_off));
1340 pg_off += IBLND_MSG_SIZE;
1341 LASSERT(pg_off <= PAGE_SIZE);
1343 if (pg_off == PAGE_SIZE) {
1346 LASSERT(ipg <= IBLND_RX_MSG_PAGES(conn));
1352 kiblnd_unmap_tx_pool(kib_tx_pool_t *tpo)
1354 kib_hca_dev_t *hdev = tpo->tpo_hdev;
1358 LASSERT (tpo->tpo_pool.po_allocated == 0);
1363 for (i = 0; i < tpo->tpo_pool.po_size; i++) {
1364 tx = &tpo->tpo_tx_descs[i];
1365 kiblnd_dma_unmap_single(hdev->ibh_ibdev,
1366 KIBLND_UNMAP_ADDR(tx, tx_msgunmap,
1368 IBLND_MSG_SIZE, DMA_TO_DEVICE);
1371 kiblnd_hdev_decref(hdev);
1372 tpo->tpo_hdev = NULL;
1375 static kib_hca_dev_t *
1376 kiblnd_current_hdev(kib_dev_t *dev)
1378 kib_hca_dev_t *hdev;
1379 unsigned long flags;
1382 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1383 while (dev->ibd_failover) {
1384 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1386 CDEBUG(D_NET, "%s: Wait for failover\n",
1388 set_current_state(TASK_INTERRUPTIBLE);
1389 schedule_timeout(cfs_time_seconds(1) / 100);
1391 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1394 kiblnd_hdev_addref_locked(dev->ibd_hdev);
1395 hdev = dev->ibd_hdev;
1397 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1403 kiblnd_map_tx_pool(kib_tx_pool_t *tpo)
1405 kib_pages_t *txpgs = tpo->tpo_tx_pages;
1406 kib_pool_t *pool = &tpo->tpo_pool;
1407 kib_net_t *net = pool->po_owner->ps_net;
1415 LASSERT (net != NULL);
1419 /* pre-mapped messages are not bigger than 1 page */
1420 CLASSERT (IBLND_MSG_SIZE <= PAGE_SIZE);
1422 /* No fancy arithmetic when we do the buffer calculations */
1423 CLASSERT (PAGE_SIZE % IBLND_MSG_SIZE == 0);
1425 tpo->tpo_hdev = kiblnd_current_hdev(dev);
1427 for (ipage = page_offset = i = 0; i < pool->po_size; i++) {
1428 page = txpgs->ibp_pages[ipage];
1429 tx = &tpo->tpo_tx_descs[i];
1431 tx->tx_msg = (kib_msg_t *)(((char *)page_address(page)) +
1434 tx->tx_msgaddr = kiblnd_dma_map_single(tpo->tpo_hdev->ibh_ibdev,
1438 LASSERT(!kiblnd_dma_mapping_error(tpo->tpo_hdev->ibh_ibdev,
1440 KIBLND_UNMAP_ADDR_SET(tx, tx_msgunmap, tx->tx_msgaddr);
1442 list_add(&tx->tx_list, &pool->po_free_list);
1444 page_offset += IBLND_MSG_SIZE;
1445 LASSERT(page_offset <= PAGE_SIZE);
1447 if (page_offset == PAGE_SIZE) {
1450 LASSERT(ipage <= txpgs->ibp_npages);
1456 kiblnd_destroy_fmr_pool(kib_fmr_pool_t *fpo)
1458 LASSERT(fpo->fpo_map_count == 0);
1460 if (fpo->fpo_is_fmr && fpo->fmr.fpo_fmr_pool) {
1461 ib_destroy_fmr_pool(fpo->fmr.fpo_fmr_pool);
1463 struct kib_fast_reg_descriptor *frd, *tmp;
1466 list_for_each_entry_safe(frd, tmp, &fpo->fast_reg.fpo_pool_list,
1468 list_del(&frd->frd_list);
1469 #ifndef HAVE_IB_MAP_MR_SG
1470 ib_free_fast_reg_page_list(frd->frd_frpl);
1472 ib_dereg_mr(frd->frd_mr);
1473 LIBCFS_FREE(frd, sizeof(*frd));
1476 if (i < fpo->fast_reg.fpo_pool_size)
1477 CERROR("FastReg pool still has %d regions registered\n",
1478 fpo->fast_reg.fpo_pool_size - i);
1482 kiblnd_hdev_decref(fpo->fpo_hdev);
1484 LIBCFS_FREE(fpo, sizeof(*fpo));
1488 kiblnd_destroy_fmr_pool_list(struct list_head *head)
1490 kib_fmr_pool_t *fpo, *tmp;
1492 list_for_each_entry_safe(fpo, tmp, head, fpo_list) {
1493 list_del(&fpo->fpo_list);
1494 kiblnd_destroy_fmr_pool(fpo);
1499 kiblnd_fmr_pool_size(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
1502 int size = tunables->lnd_fmr_pool_size / ncpts;
1504 return max(IBLND_FMR_POOL, size);
1508 kiblnd_fmr_flush_trigger(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
1511 int size = tunables->lnd_fmr_flush_trigger / ncpts;
1513 return max(IBLND_FMR_POOL_FLUSH, size);
1516 static int kiblnd_alloc_fmr_pool(kib_fmr_poolset_t *fps, kib_fmr_pool_t *fpo)
1518 struct ib_fmr_pool_param param = {
1519 .max_pages_per_fmr = LNET_MAX_PAYLOAD/PAGE_SIZE,
1520 .page_shift = PAGE_SHIFT,
1521 .access = (IB_ACCESS_LOCAL_WRITE |
1522 IB_ACCESS_REMOTE_WRITE),
1523 .pool_size = fps->fps_pool_size,
1524 .dirty_watermark = fps->fps_flush_trigger,
1525 .flush_function = NULL,
1527 .cache = !!fps->fps_cache };
1530 fpo->fmr.fpo_fmr_pool = ib_create_fmr_pool(fpo->fpo_hdev->ibh_pd,
1532 if (IS_ERR(fpo->fmr.fpo_fmr_pool)) {
1533 rc = PTR_ERR(fpo->fmr.fpo_fmr_pool);
1535 CERROR("Failed to create FMR pool: %d\n", rc);
1537 CERROR("FMRs are not supported\n");
1539 fpo->fpo_is_fmr = true;
1544 static int kiblnd_alloc_freg_pool(kib_fmr_poolset_t *fps, kib_fmr_pool_t *fpo,
1547 struct kib_fast_reg_descriptor *frd, *tmp;
1550 fpo->fpo_is_fmr = false;
1552 INIT_LIST_HEAD(&fpo->fast_reg.fpo_pool_list);
1553 fpo->fast_reg.fpo_pool_size = 0;
1554 for (i = 0; i < fps->fps_pool_size; i++) {
1555 LIBCFS_CPT_ALLOC(frd, lnet_cpt_table(), fps->fps_cpt,
1558 CERROR("Failed to allocate a new fast_reg descriptor\n");
1564 #ifndef HAVE_IB_MAP_MR_SG
1565 frd->frd_frpl = ib_alloc_fast_reg_page_list(fpo->fpo_hdev->ibh_ibdev,
1566 LNET_MAX_PAYLOAD/PAGE_SIZE);
1567 if (IS_ERR(frd->frd_frpl)) {
1568 rc = PTR_ERR(frd->frd_frpl);
1569 CERROR("Failed to allocate ib_fast_reg_page_list: %d\n",
1571 frd->frd_frpl = NULL;
1576 #ifdef HAVE_IB_ALLOC_FAST_REG_MR
1577 frd->frd_mr = ib_alloc_fast_reg_mr(fpo->fpo_hdev->ibh_pd,
1578 LNET_MAX_PAYLOAD/PAGE_SIZE);
1581 * it is expected to get here if this is an MLX-5 card.
1582 * MLX-4 cards will always use FMR and MLX-5 cards will
1583 * always use fast_reg. It turns out that some MLX-5 cards
1584 * (possibly due to older FW versions) do not natively support
1585 * gaps. So we will need to track them here.
1587 frd->frd_mr = ib_alloc_mr(fpo->fpo_hdev->ibh_pd,
1588 #ifdef IB_MR_TYPE_SG_GAPS
1589 ((*kiblnd_tunables.kib_use_fastreg_gaps == 1) &&
1590 (dev_caps & IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT)) ?
1591 IB_MR_TYPE_SG_GAPS :
1596 LNET_MAX_PAYLOAD/PAGE_SIZE);
1597 if ((*kiblnd_tunables.kib_use_fastreg_gaps == 1) &&
1598 (dev_caps & IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT))
1599 CWARN("using IB_MR_TYPE_SG_GAPS, expect a performance drop\n");
1601 if (IS_ERR(frd->frd_mr)) {
1602 rc = PTR_ERR(frd->frd_mr);
1603 CERROR("Failed to allocate ib_fast_reg_mr: %d\n", rc);
1608 /* There appears to be a bug in MLX5 code where you must
1609 * invalidate the rkey of a new FastReg pool before first
1610 * using it. Thus, I am marking the FRD invalid here. */
1611 frd->frd_valid = false;
1613 list_add_tail(&frd->frd_list, &fpo->fast_reg.fpo_pool_list);
1614 fpo->fast_reg.fpo_pool_size++;
1621 ib_dereg_mr(frd->frd_mr);
1622 #ifndef HAVE_IB_MAP_MR_SG
1624 ib_free_fast_reg_page_list(frd->frd_frpl);
1626 LIBCFS_FREE(frd, sizeof(*frd));
1629 list_for_each_entry_safe(frd, tmp, &fpo->fast_reg.fpo_pool_list,
1631 list_del(&frd->frd_list);
1632 #ifndef HAVE_IB_MAP_MR_SG
1633 ib_free_fast_reg_page_list(frd->frd_frpl);
1635 ib_dereg_mr(frd->frd_mr);
1636 LIBCFS_FREE(frd, sizeof(*frd));
1643 kiblnd_create_fmr_pool(kib_fmr_poolset_t *fps, kib_fmr_pool_t **pp_fpo)
1645 kib_dev_t *dev = fps->fps_net->ibn_dev;
1646 kib_fmr_pool_t *fpo;
1649 LIBCFS_CPT_ALLOC(fpo, lnet_cpt_table(), fps->fps_cpt, sizeof(*fpo));
1653 memset(fpo, 0, sizeof(*fpo));
1655 fpo->fpo_hdev = kiblnd_current_hdev(dev);
1657 if (dev->ibd_dev_caps & IBLND_DEV_CAPS_FMR_ENABLED)
1658 rc = kiblnd_alloc_fmr_pool(fps, fpo);
1660 rc = kiblnd_alloc_freg_pool(fps, fpo, dev->ibd_dev_caps);
1664 fpo->fpo_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
1665 fpo->fpo_owner = fps;
1671 kiblnd_hdev_decref(fpo->fpo_hdev);
1672 LIBCFS_FREE(fpo, sizeof(*fpo));
1677 kiblnd_fail_fmr_poolset(kib_fmr_poolset_t *fps, struct list_head *zombies)
1679 if (fps->fps_net == NULL) /* intialized? */
1682 spin_lock(&fps->fps_lock);
1684 while (!list_empty(&fps->fps_pool_list)) {
1685 kib_fmr_pool_t *fpo = list_entry(fps->fps_pool_list.next,
1686 kib_fmr_pool_t, fpo_list);
1687 fpo->fpo_failed = 1;
1688 list_del(&fpo->fpo_list);
1689 if (fpo->fpo_map_count == 0)
1690 list_add(&fpo->fpo_list, zombies);
1692 list_add(&fpo->fpo_list, &fps->fps_failed_pool_list);
1695 spin_unlock(&fps->fps_lock);
1699 kiblnd_fini_fmr_poolset(kib_fmr_poolset_t *fps)
1701 if (fps->fps_net != NULL) { /* initialized? */
1702 kiblnd_destroy_fmr_pool_list(&fps->fps_failed_pool_list);
1703 kiblnd_destroy_fmr_pool_list(&fps->fps_pool_list);
1708 kiblnd_init_fmr_poolset(kib_fmr_poolset_t *fps, int cpt, int ncpts,
1710 struct lnet_ioctl_config_o2iblnd_tunables *tunables)
1712 kib_fmr_pool_t *fpo;
1715 memset(fps, 0, sizeof(kib_fmr_poolset_t));
1720 fps->fps_pool_size = kiblnd_fmr_pool_size(tunables, ncpts);
1721 fps->fps_flush_trigger = kiblnd_fmr_flush_trigger(tunables, ncpts);
1722 fps->fps_cache = tunables->lnd_fmr_cache;
1724 spin_lock_init(&fps->fps_lock);
1725 INIT_LIST_HEAD(&fps->fps_pool_list);
1726 INIT_LIST_HEAD(&fps->fps_failed_pool_list);
1728 rc = kiblnd_create_fmr_pool(fps, &fpo);
1730 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1736 kiblnd_fmr_pool_is_idle(kib_fmr_pool_t *fpo, time64_t now)
1738 if (fpo->fpo_map_count != 0) /* still in use */
1740 if (fpo->fpo_failed)
1742 return now >= fpo->fpo_deadline;
1746 kiblnd_map_tx_pages(kib_tx_t *tx, kib_rdma_desc_t *rd)
1748 kib_hca_dev_t *hdev;
1749 __u64 *pages = tx->tx_pages;
1754 hdev = tx->tx_pool->tpo_hdev;
1756 for (i = 0, npages = 0; i < rd->rd_nfrags; i++) {
1757 for (size = 0; size < rd->rd_frags[i].rf_nob;
1758 size += hdev->ibh_page_size) {
1759 pages[npages++] = (rd->rd_frags[i].rf_addr &
1760 hdev->ibh_page_mask) + size;
1768 kiblnd_fmr_pool_unmap(kib_fmr_t *fmr, int status)
1770 struct list_head zombies = LIST_HEAD_INIT(zombies);
1771 kib_fmr_pool_t *fpo = fmr->fmr_pool;
1772 kib_fmr_poolset_t *fps;
1773 time64_t now = ktime_get_seconds();
1774 kib_fmr_pool_t *tmp;
1780 fps = fpo->fpo_owner;
1781 if (fpo->fpo_is_fmr) {
1782 if (fmr->fmr_pfmr) {
1783 rc = ib_fmr_pool_unmap(fmr->fmr_pfmr);
1785 fmr->fmr_pfmr = NULL;
1789 rc = ib_flush_fmr_pool(fpo->fmr.fpo_fmr_pool);
1793 struct kib_fast_reg_descriptor *frd = fmr->fmr_frd;
1796 frd->frd_valid = false;
1797 spin_lock(&fps->fps_lock);
1798 list_add_tail(&frd->frd_list, &fpo->fast_reg.fpo_pool_list);
1799 spin_unlock(&fps->fps_lock);
1800 fmr->fmr_frd = NULL;
1803 fmr->fmr_pool = NULL;
1805 spin_lock(&fps->fps_lock);
1806 fpo->fpo_map_count--; /* decref the pool */
1808 list_for_each_entry_safe(fpo, tmp, &fps->fps_pool_list, fpo_list) {
1809 /* the first pool is persistent */
1810 if (fps->fps_pool_list.next == &fpo->fpo_list)
1813 if (kiblnd_fmr_pool_is_idle(fpo, now)) {
1814 list_move(&fpo->fpo_list, &zombies);
1818 spin_unlock(&fps->fps_lock);
1820 if (!list_empty(&zombies))
1821 kiblnd_destroy_fmr_pool_list(&zombies);
1825 kiblnd_fmr_pool_map(kib_fmr_poolset_t *fps, kib_tx_t *tx, kib_rdma_desc_t *rd,
1826 __u32 nob, __u64 iov, kib_fmr_t *fmr)
1828 kib_fmr_pool_t *fpo;
1829 __u64 *pages = tx->tx_pages;
1831 bool is_rx = (rd != tx->tx_rd);
1832 bool tx_pages_mapped = 0;
1837 spin_lock(&fps->fps_lock);
1838 version = fps->fps_version;
1839 list_for_each_entry(fpo, &fps->fps_pool_list, fpo_list) {
1840 fpo->fpo_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
1841 fpo->fpo_map_count++;
1843 if (fpo->fpo_is_fmr) {
1844 struct ib_pool_fmr *pfmr;
1846 spin_unlock(&fps->fps_lock);
1848 if (!tx_pages_mapped) {
1849 npages = kiblnd_map_tx_pages(tx, rd);
1850 tx_pages_mapped = 1;
1853 pfmr = ib_fmr_pool_map_phys(fpo->fmr.fpo_fmr_pool,
1854 pages, npages, iov);
1855 if (likely(!IS_ERR(pfmr))) {
1856 fmr->fmr_key = is_rx ? pfmr->fmr->rkey
1858 fmr->fmr_frd = NULL;
1859 fmr->fmr_pfmr = pfmr;
1860 fmr->fmr_pool = fpo;
1865 if (!list_empty(&fpo->fast_reg.fpo_pool_list)) {
1866 struct kib_fast_reg_descriptor *frd;
1867 #ifdef HAVE_IB_MAP_MR_SG
1868 struct ib_reg_wr *wr;
1871 struct ib_rdma_wr *wr;
1872 struct ib_fast_reg_page_list *frpl;
1876 frd = list_first_entry(&fpo->fast_reg.fpo_pool_list,
1877 struct kib_fast_reg_descriptor,
1879 list_del(&frd->frd_list);
1880 spin_unlock(&fps->fps_lock);
1882 #ifndef HAVE_IB_MAP_MR_SG
1883 frpl = frd->frd_frpl;
1887 if (!frd->frd_valid) {
1888 struct ib_rdma_wr *inv_wr;
1889 __u32 key = is_rx ? mr->rkey : mr->lkey;
1891 inv_wr = &frd->frd_inv_wr;
1892 memset(inv_wr, 0, sizeof(*inv_wr));
1894 inv_wr->wr.opcode = IB_WR_LOCAL_INV;
1895 inv_wr->wr.wr_id = IBLND_WID_MR;
1896 inv_wr->wr.ex.invalidate_rkey = key;
1899 key = ib_inc_rkey(key);
1900 ib_update_fast_reg_key(mr, key);
1903 #ifdef HAVE_IB_MAP_MR_SG
1904 #ifdef HAVE_IB_MAP_MR_SG_5ARGS
1905 n = ib_map_mr_sg(mr, tx->tx_frags,
1906 tx->tx_nfrags, NULL, PAGE_SIZE);
1908 n = ib_map_mr_sg(mr, tx->tx_frags,
1909 tx->tx_nfrags, PAGE_SIZE);
1911 if (unlikely(n != tx->tx_nfrags)) {
1912 CERROR("Failed to map mr %d/%d "
1913 "elements\n", n, tx->tx_nfrags);
1914 return n < 0 ? n : -EINVAL;
1917 wr = &frd->frd_fastreg_wr;
1918 memset(wr, 0, sizeof(*wr));
1920 wr->wr.opcode = IB_WR_REG_MR;
1921 wr->wr.wr_id = IBLND_WID_MR;
1923 wr->wr.send_flags = 0;
1925 wr->key = is_rx ? mr->rkey : mr->lkey;
1926 wr->access = (IB_ACCESS_LOCAL_WRITE |
1927 IB_ACCESS_REMOTE_WRITE);
1929 if (!tx_pages_mapped) {
1930 npages = kiblnd_map_tx_pages(tx, rd);
1931 tx_pages_mapped = 1;
1934 LASSERT(npages <= frpl->max_page_list_len);
1935 memcpy(frpl->page_list, pages,
1936 sizeof(*pages) * npages);
1938 /* Prepare FastReg WR */
1939 wr = &frd->frd_fastreg_wr;
1940 memset(wr, 0, sizeof(*wr));
1942 wr->wr.opcode = IB_WR_FAST_REG_MR;
1943 wr->wr.wr_id = IBLND_WID_MR;
1945 wr->wr.wr.fast_reg.iova_start = iov;
1946 wr->wr.wr.fast_reg.page_list = frpl;
1947 wr->wr.wr.fast_reg.page_list_len = npages;
1948 wr->wr.wr.fast_reg.page_shift = PAGE_SHIFT;
1949 wr->wr.wr.fast_reg.length = nob;
1950 wr->wr.wr.fast_reg.rkey =
1951 is_rx ? mr->rkey : mr->lkey;
1952 wr->wr.wr.fast_reg.access_flags =
1953 (IB_ACCESS_LOCAL_WRITE |
1954 IB_ACCESS_REMOTE_WRITE);
1957 fmr->fmr_key = is_rx ? mr->rkey : mr->lkey;
1959 fmr->fmr_pfmr = NULL;
1960 fmr->fmr_pool = fpo;
1963 spin_unlock(&fps->fps_lock);
1967 spin_lock(&fps->fps_lock);
1968 fpo->fpo_map_count--;
1969 if (rc != -EAGAIN) {
1970 spin_unlock(&fps->fps_lock);
1974 /* EAGAIN and ... */
1975 if (version != fps->fps_version) {
1976 spin_unlock(&fps->fps_lock);
1981 if (fps->fps_increasing) {
1982 spin_unlock(&fps->fps_lock);
1983 CDEBUG(D_NET, "Another thread is allocating new "
1984 "FMR pool, waiting for her to complete\n");
1990 if (ktime_get_seconds() < fps->fps_next_retry) {
1991 /* someone failed recently */
1992 spin_unlock(&fps->fps_lock);
1996 fps->fps_increasing = 1;
1997 spin_unlock(&fps->fps_lock);
1999 CDEBUG(D_NET, "Allocate new FMR pool\n");
2000 rc = kiblnd_create_fmr_pool(fps, &fpo);
2001 spin_lock(&fps->fps_lock);
2002 fps->fps_increasing = 0;
2005 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
2007 fps->fps_next_retry = ktime_get_seconds() + IBLND_POOL_RETRY;
2009 spin_unlock(&fps->fps_lock);
2015 kiblnd_fini_pool(kib_pool_t *pool)
2017 LASSERT(list_empty(&pool->po_free_list));
2018 LASSERT(pool->po_allocated == 0);
2020 CDEBUG(D_NET, "Finalize %s pool\n", pool->po_owner->ps_name);
2024 kiblnd_init_pool(kib_poolset_t *ps, kib_pool_t *pool, int size)
2026 CDEBUG(D_NET, "Initialize %s pool\n", ps->ps_name);
2028 memset(pool, 0, sizeof(kib_pool_t));
2029 INIT_LIST_HEAD(&pool->po_free_list);
2030 pool->po_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
2031 pool->po_owner = ps;
2032 pool->po_size = size;
2036 kiblnd_destroy_pool_list(struct list_head *head)
2040 while (!list_empty(head)) {
2041 pool = list_entry(head->next, kib_pool_t, po_list);
2042 list_del(&pool->po_list);
2044 LASSERT(pool->po_owner != NULL);
2045 pool->po_owner->ps_pool_destroy(pool);
2050 kiblnd_fail_poolset(kib_poolset_t *ps, struct list_head *zombies)
2052 if (ps->ps_net == NULL) /* intialized? */
2055 spin_lock(&ps->ps_lock);
2056 while (!list_empty(&ps->ps_pool_list)) {
2057 kib_pool_t *po = list_entry(ps->ps_pool_list.next,
2058 kib_pool_t, po_list);
2060 list_del(&po->po_list);
2061 if (po->po_allocated == 0)
2062 list_add(&po->po_list, zombies);
2064 list_add(&po->po_list, &ps->ps_failed_pool_list);
2066 spin_unlock(&ps->ps_lock);
2070 kiblnd_fini_poolset(kib_poolset_t *ps)
2072 if (ps->ps_net != NULL) { /* initialized? */
2073 kiblnd_destroy_pool_list(&ps->ps_failed_pool_list);
2074 kiblnd_destroy_pool_list(&ps->ps_pool_list);
2079 kiblnd_init_poolset(kib_poolset_t *ps, int cpt,
2080 kib_net_t *net, char *name, int size,
2081 kib_ps_pool_create_t po_create,
2082 kib_ps_pool_destroy_t po_destroy,
2083 kib_ps_node_init_t nd_init,
2084 kib_ps_node_fini_t nd_fini)
2089 memset(ps, 0, sizeof(kib_poolset_t));
2093 ps->ps_pool_create = po_create;
2094 ps->ps_pool_destroy = po_destroy;
2095 ps->ps_node_init = nd_init;
2096 ps->ps_node_fini = nd_fini;
2097 ps->ps_pool_size = size;
2098 if (strlcpy(ps->ps_name, name, sizeof(ps->ps_name))
2099 >= sizeof(ps->ps_name))
2101 spin_lock_init(&ps->ps_lock);
2102 INIT_LIST_HEAD(&ps->ps_pool_list);
2103 INIT_LIST_HEAD(&ps->ps_failed_pool_list);
2105 rc = ps->ps_pool_create(ps, size, &pool);
2107 list_add(&pool->po_list, &ps->ps_pool_list);
2109 CERROR("Failed to create the first pool for %s\n", ps->ps_name);
2115 kiblnd_pool_is_idle(kib_pool_t *pool, time64_t now)
2117 if (pool->po_allocated != 0) /* still in use */
2119 if (pool->po_failed)
2121 return now >= pool->po_deadline;
2125 kiblnd_pool_free_node(kib_pool_t *pool, struct list_head *node)
2127 struct list_head zombies = LIST_HEAD_INIT(zombies);
2128 kib_poolset_t *ps = pool->po_owner;
2130 time64_t now = ktime_get_seconds();
2132 spin_lock(&ps->ps_lock);
2134 if (ps->ps_node_fini != NULL)
2135 ps->ps_node_fini(pool, node);
2137 LASSERT(pool->po_allocated > 0);
2138 list_add(node, &pool->po_free_list);
2139 pool->po_allocated--;
2141 list_for_each_entry_safe(pool, tmp, &ps->ps_pool_list, po_list) {
2142 /* the first pool is persistent */
2143 if (ps->ps_pool_list.next == &pool->po_list)
2146 if (kiblnd_pool_is_idle(pool, now))
2147 list_move(&pool->po_list, &zombies);
2149 spin_unlock(&ps->ps_lock);
2151 if (!list_empty(&zombies))
2152 kiblnd_destroy_pool_list(&zombies);
2156 kiblnd_pool_alloc_node(kib_poolset_t *ps)
2158 struct list_head *node;
2161 unsigned int interval = 1;
2162 ktime_t time_before;
2163 unsigned int trips = 0;
2166 spin_lock(&ps->ps_lock);
2167 list_for_each_entry(pool, &ps->ps_pool_list, po_list) {
2168 if (list_empty(&pool->po_free_list))
2171 pool->po_allocated++;
2172 pool->po_deadline = ktime_get_seconds() +
2173 IBLND_POOL_DEADLINE;
2174 node = pool->po_free_list.next;
2177 if (ps->ps_node_init != NULL) {
2178 /* still hold the lock */
2179 ps->ps_node_init(pool, node);
2181 spin_unlock(&ps->ps_lock);
2185 /* no available tx pool and ... */
2186 if (ps->ps_increasing) {
2187 /* another thread is allocating a new pool */
2188 spin_unlock(&ps->ps_lock);
2190 CDEBUG(D_NET, "Another thread is allocating new "
2191 "%s pool, waiting %d HZs for her to complete."
2193 ps->ps_name, interval, trips);
2195 set_current_state(TASK_INTERRUPTIBLE);
2196 schedule_timeout(interval);
2197 if (interval < cfs_time_seconds(1))
2203 if (ktime_get_seconds() < ps->ps_next_retry) {
2204 /* someone failed recently */
2205 spin_unlock(&ps->ps_lock);
2209 ps->ps_increasing = 1;
2210 spin_unlock(&ps->ps_lock);
2212 CDEBUG(D_NET, "%s pool exhausted, allocate new pool\n", ps->ps_name);
2213 time_before = ktime_get();
2214 rc = ps->ps_pool_create(ps, ps->ps_pool_size, &pool);
2215 CDEBUG(D_NET, "ps_pool_create took %lld ms to complete",
2216 ktime_ms_delta(ktime_get(), time_before));
2218 spin_lock(&ps->ps_lock);
2219 ps->ps_increasing = 0;
2221 list_add_tail(&pool->po_list, &ps->ps_pool_list);
2223 ps->ps_next_retry = ktime_get_seconds() + IBLND_POOL_RETRY;
2224 CERROR("Can't allocate new %s pool because out of memory\n",
2227 spin_unlock(&ps->ps_lock);
2233 kiblnd_destroy_tx_pool(kib_pool_t *pool)
2235 kib_tx_pool_t *tpo = container_of(pool, kib_tx_pool_t, tpo_pool);
2238 LASSERT (pool->po_allocated == 0);
2240 if (tpo->tpo_tx_pages != NULL) {
2241 kiblnd_unmap_tx_pool(tpo);
2242 kiblnd_free_pages(tpo->tpo_tx_pages);
2245 if (tpo->tpo_tx_descs == NULL)
2248 for (i = 0; i < pool->po_size; i++) {
2249 kib_tx_t *tx = &tpo->tpo_tx_descs[i];
2250 int wrq_sge = *kiblnd_tunables.kib_wrq_sge;
2252 list_del(&tx->tx_list);
2253 if (tx->tx_pages != NULL)
2254 LIBCFS_FREE(tx->tx_pages,
2256 sizeof(*tx->tx_pages));
2257 if (tx->tx_frags != NULL)
2258 LIBCFS_FREE(tx->tx_frags,
2259 (1 + IBLND_MAX_RDMA_FRAGS) *
2260 sizeof(*tx->tx_frags));
2261 if (tx->tx_wrq != NULL)
2262 LIBCFS_FREE(tx->tx_wrq,
2263 (1 + IBLND_MAX_RDMA_FRAGS) *
2264 sizeof(*tx->tx_wrq));
2265 if (tx->tx_sge != NULL)
2266 LIBCFS_FREE(tx->tx_sge,
2267 (1 + IBLND_MAX_RDMA_FRAGS) * wrq_sge *
2268 sizeof(*tx->tx_sge));
2269 if (tx->tx_rd != NULL)
2270 LIBCFS_FREE(tx->tx_rd,
2271 offsetof(kib_rdma_desc_t,
2272 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2275 LIBCFS_FREE(tpo->tpo_tx_descs,
2276 pool->po_size * sizeof(kib_tx_t));
2278 kiblnd_fini_pool(pool);
2279 LIBCFS_FREE(tpo, sizeof(kib_tx_pool_t));
2282 static int kiblnd_tx_pool_size(struct lnet_ni *ni, int ncpts)
2284 struct lnet_ioctl_config_o2iblnd_tunables *tunables;
2287 tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib;
2288 ntx = tunables->lnd_ntx / ncpts;
2290 return max(IBLND_TX_POOL, ntx);
2294 kiblnd_create_tx_pool(kib_poolset_t *ps, int size, kib_pool_t **pp_po)
2301 LIBCFS_CPT_ALLOC(tpo, lnet_cpt_table(), ps->ps_cpt, sizeof(*tpo));
2303 CERROR("Failed to allocate TX pool\n");
2307 pool = &tpo->tpo_pool;
2308 kiblnd_init_pool(ps, pool, size);
2309 tpo->tpo_tx_descs = NULL;
2310 tpo->tpo_tx_pages = NULL;
2312 npg = (size * IBLND_MSG_SIZE + PAGE_SIZE - 1) / PAGE_SIZE;
2313 if (kiblnd_alloc_pages(&tpo->tpo_tx_pages, ps->ps_cpt, npg) != 0) {
2314 CERROR("Can't allocate tx pages: %d\n", npg);
2315 LIBCFS_FREE(tpo, sizeof(kib_tx_pool_t));
2319 LIBCFS_CPT_ALLOC(tpo->tpo_tx_descs, lnet_cpt_table(), ps->ps_cpt,
2320 size * sizeof(kib_tx_t));
2321 if (tpo->tpo_tx_descs == NULL) {
2322 CERROR("Can't allocate %d tx descriptors\n", size);
2323 ps->ps_pool_destroy(pool);
2327 memset(tpo->tpo_tx_descs, 0, size * sizeof(kib_tx_t));
2329 for (i = 0; i < size; i++) {
2330 kib_tx_t *tx = &tpo->tpo_tx_descs[i];
2331 int wrq_sge = *kiblnd_tunables.kib_wrq_sge;
2334 if (ps->ps_net->ibn_fmr_ps != NULL) {
2335 LIBCFS_CPT_ALLOC(tx->tx_pages,
2336 lnet_cpt_table(), ps->ps_cpt,
2337 LNET_MAX_IOV * sizeof(*tx->tx_pages));
2338 if (tx->tx_pages == NULL)
2342 LIBCFS_CPT_ALLOC(tx->tx_frags, lnet_cpt_table(), ps->ps_cpt,
2343 (1 + IBLND_MAX_RDMA_FRAGS) *
2344 sizeof(*tx->tx_frags));
2345 if (tx->tx_frags == NULL)
2348 sg_init_table(tx->tx_frags, IBLND_MAX_RDMA_FRAGS + 1);
2350 LIBCFS_CPT_ALLOC(tx->tx_wrq, lnet_cpt_table(), ps->ps_cpt,
2351 (1 + IBLND_MAX_RDMA_FRAGS) *
2352 sizeof(*tx->tx_wrq));
2353 if (tx->tx_wrq == NULL)
2356 LIBCFS_CPT_ALLOC(tx->tx_sge, lnet_cpt_table(), ps->ps_cpt,
2357 (1 + IBLND_MAX_RDMA_FRAGS) * wrq_sge *
2358 sizeof(*tx->tx_sge));
2359 if (tx->tx_sge == NULL)
2362 LIBCFS_CPT_ALLOC(tx->tx_rd, lnet_cpt_table(), ps->ps_cpt,
2363 offsetof(kib_rdma_desc_t,
2364 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2365 if (tx->tx_rd == NULL)
2370 kiblnd_map_tx_pool(tpo);
2375 ps->ps_pool_destroy(pool);
2380 kiblnd_tx_init(kib_pool_t *pool, struct list_head *node)
2382 kib_tx_poolset_t *tps = container_of(pool->po_owner, kib_tx_poolset_t,
2384 kib_tx_t *tx = list_entry(node, kib_tx_t, tx_list);
2386 tx->tx_cookie = tps->tps_next_tx_cookie++;
2390 kiblnd_net_fini_pools(kib_net_t *net)
2394 cfs_cpt_for_each(i, lnet_cpt_table()) {
2395 kib_tx_poolset_t *tps;
2396 kib_fmr_poolset_t *fps;
2398 if (net->ibn_tx_ps != NULL) {
2399 tps = net->ibn_tx_ps[i];
2400 kiblnd_fini_poolset(&tps->tps_poolset);
2403 if (net->ibn_fmr_ps != NULL) {
2404 fps = net->ibn_fmr_ps[i];
2405 kiblnd_fini_fmr_poolset(fps);
2409 if (net->ibn_tx_ps != NULL) {
2410 cfs_percpt_free(net->ibn_tx_ps);
2411 net->ibn_tx_ps = NULL;
2414 if (net->ibn_fmr_ps != NULL) {
2415 cfs_percpt_free(net->ibn_fmr_ps);
2416 net->ibn_fmr_ps = NULL;
2421 kiblnd_net_init_pools(kib_net_t *net, struct lnet_ni *ni, __u32 *cpts,
2424 struct lnet_ioctl_config_o2iblnd_tunables *tunables;
2425 #ifdef HAVE_IB_GET_DMA_MR
2426 unsigned long flags;
2432 tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib;
2434 #ifdef HAVE_IB_GET_DMA_MR
2435 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2437 * if lnd_map_on_demand is zero then we have effectively disabled
2438 * FMR or FastReg and we're using global memory regions
2441 if (!tunables->lnd_map_on_demand) {
2442 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
2444 goto create_tx_pool;
2447 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2450 if (tunables->lnd_fmr_pool_size < tunables->lnd_ntx / 4) {
2451 CERROR("Can't set fmr pool size (%d) < ntx / 4(%d)\n",
2452 tunables->lnd_fmr_pool_size,
2453 tunables->lnd_ntx / 4);
2458 /* TX pool must be created later than FMR, see LU-2268
2460 LASSERT(net->ibn_tx_ps == NULL);
2462 /* premapping can fail if ibd_nmr > 1, so we always create
2463 * FMR pool and map-on-demand if premapping failed */
2465 net->ibn_fmr_ps = cfs_percpt_alloc(lnet_cpt_table(),
2466 sizeof(kib_fmr_poolset_t));
2467 if (net->ibn_fmr_ps == NULL) {
2468 CERROR("Failed to allocate FMR pool array\n");
2473 for (i = 0; i < ncpts; i++) {
2474 cpt = (cpts == NULL) ? i : cpts[i];
2475 rc = kiblnd_init_fmr_poolset(net->ibn_fmr_ps[cpt], cpt, ncpts,
2478 CERROR("Can't initialize FMR pool for CPT %d: %d\n",
2485 LASSERT(i == ncpts);
2487 #ifdef HAVE_IB_GET_DMA_MR
2490 net->ibn_tx_ps = cfs_percpt_alloc(lnet_cpt_table(),
2491 sizeof(kib_tx_poolset_t));
2492 if (net->ibn_tx_ps == NULL) {
2493 CERROR("Failed to allocate tx pool array\n");
2498 for (i = 0; i < ncpts; i++) {
2499 cpt = (cpts == NULL) ? i : cpts[i];
2500 rc = kiblnd_init_poolset(&net->ibn_tx_ps[cpt]->tps_poolset,
2502 kiblnd_tx_pool_size(ni, ncpts),
2503 kiblnd_create_tx_pool,
2504 kiblnd_destroy_tx_pool,
2505 kiblnd_tx_init, NULL);
2507 CERROR("Can't initialize TX pool for CPT %d: %d\n",
2515 kiblnd_net_fini_pools(net);
2521 kiblnd_hdev_get_attr(kib_hca_dev_t *hdev)
2523 struct ib_device_attr *dev_attr;
2526 /* It's safe to assume a HCA can handle a page size
2527 * matching that of the native system */
2528 hdev->ibh_page_shift = PAGE_SHIFT;
2529 hdev->ibh_page_size = 1 << PAGE_SHIFT;
2530 hdev->ibh_page_mask = ~((__u64)hdev->ibh_page_size - 1);
2532 #ifndef HAVE_IB_DEVICE_ATTRS
2533 LIBCFS_ALLOC(dev_attr, sizeof(*dev_attr));
2534 if (dev_attr == NULL) {
2535 CERROR("Out of memory\n");
2539 rc = ib_query_device(hdev->ibh_ibdev, dev_attr);
2541 CERROR("Failed to query IB device: %d\n", rc);
2542 goto out_clean_attr;
2545 dev_attr = &hdev->ibh_ibdev->attrs;
2548 hdev->ibh_mr_size = dev_attr->max_mr_size;
2550 /* Setup device Memory Registration capabilities */
2551 if (hdev->ibh_ibdev->alloc_fmr &&
2552 hdev->ibh_ibdev->dealloc_fmr &&
2553 hdev->ibh_ibdev->map_phys_fmr &&
2554 hdev->ibh_ibdev->unmap_fmr) {
2555 LCONSOLE_INFO("Using FMR for registration\n");
2556 hdev->ibh_dev->ibd_dev_caps |= IBLND_DEV_CAPS_FMR_ENABLED;
2557 } else if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) {
2558 LCONSOLE_INFO("Using FastReg for registration\n");
2559 hdev->ibh_dev->ibd_dev_caps |= IBLND_DEV_CAPS_FASTREG_ENABLED;
2560 #ifndef HAVE_IB_ALLOC_FAST_REG_MR
2561 #ifdef IB_DEVICE_SG_GAPS_REG
2562 if (dev_attr->device_cap_flags & IB_DEVICE_SG_GAPS_REG)
2563 hdev->ibh_dev->ibd_dev_caps |= IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT;
2570 if (rc == 0 && hdev->ibh_mr_size == ~0ULL)
2571 hdev->ibh_mr_shift = 64;
2575 #ifndef HAVE_IB_DEVICE_ATTRS
2577 LIBCFS_FREE(dev_attr, sizeof(*dev_attr));
2581 CERROR("IB device does not support FMRs nor FastRegs, can't "
2582 "register memory: %d\n", rc);
2583 else if (rc == -EINVAL)
2584 CERROR("Invalid mr size: %#llx\n", hdev->ibh_mr_size);
2588 #ifdef HAVE_IB_GET_DMA_MR
2590 kiblnd_hdev_cleanup_mrs(kib_hca_dev_t *hdev)
2592 if (hdev->ibh_mrs == NULL)
2595 ib_dereg_mr(hdev->ibh_mrs);
2597 hdev->ibh_mrs = NULL;
2602 kiblnd_hdev_destroy(kib_hca_dev_t *hdev)
2604 #ifdef HAVE_IB_GET_DMA_MR
2605 kiblnd_hdev_cleanup_mrs(hdev);
2608 if (hdev->ibh_pd != NULL)
2609 ib_dealloc_pd(hdev->ibh_pd);
2611 if (hdev->ibh_cmid != NULL)
2612 rdma_destroy_id(hdev->ibh_cmid);
2614 LIBCFS_FREE(hdev, sizeof(*hdev));
2617 #ifdef HAVE_IB_GET_DMA_MR
2619 kiblnd_hdev_setup_mrs(kib_hca_dev_t *hdev)
2622 int acflags = IB_ACCESS_LOCAL_WRITE |
2623 IB_ACCESS_REMOTE_WRITE;
2625 mr = ib_get_dma_mr(hdev->ibh_pd, acflags);
2627 CERROR("Failed ib_get_dma_mr: %ld\n", PTR_ERR(mr));
2628 kiblnd_hdev_cleanup_mrs(hdev);
2639 kiblnd_dummy_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event)
2645 kiblnd_dev_need_failover(kib_dev_t *dev)
2647 struct rdma_cm_id *cmid;
2648 struct sockaddr_in srcaddr;
2649 struct sockaddr_in dstaddr;
2652 if (dev->ibd_hdev == NULL || /* initializing */
2653 dev->ibd_hdev->ibh_cmid == NULL || /* listener is dead */
2654 *kiblnd_tunables.kib_dev_failover > 1) /* debugging */
2657 /* XXX: it's UGLY, but I don't have better way to find
2658 * ib-bonding HCA failover because:
2660 * a. no reliable CM event for HCA failover...
2661 * b. no OFED API to get ib_device for current net_device...
2663 * We have only two choices at this point:
2665 * a. rdma_bind_addr(), it will conflict with listener cmid
2666 * b. rdma_resolve_addr() to zero addr */
2667 cmid = kiblnd_rdma_create_id(kiblnd_dummy_callback, dev, RDMA_PS_TCP,
2671 CERROR("Failed to create cmid for failover: %d\n", rc);
2675 memset(&srcaddr, 0, sizeof(srcaddr));
2676 srcaddr.sin_family = AF_INET;
2677 srcaddr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2679 memset(&dstaddr, 0, sizeof(dstaddr));
2680 dstaddr.sin_family = AF_INET;
2681 rc = rdma_resolve_addr(cmid, (struct sockaddr *)&srcaddr,
2682 (struct sockaddr *)&dstaddr, 1);
2683 if (rc != 0 || cmid->device == NULL) {
2684 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2685 dev->ibd_ifname, &dev->ibd_ifip,
2687 rdma_destroy_id(cmid);
2691 rc = dev->ibd_hdev->ibh_ibdev != cmid->device; /* true for failover */
2692 rdma_destroy_id(cmid);
2697 kiblnd_dev_failover(kib_dev_t *dev)
2699 struct list_head zombie_tpo = LIST_HEAD_INIT(zombie_tpo);
2700 struct list_head zombie_ppo = LIST_HEAD_INIT(zombie_ppo);
2701 struct list_head zombie_fpo = LIST_HEAD_INIT(zombie_fpo);
2702 struct rdma_cm_id *cmid = NULL;
2703 kib_hca_dev_t *hdev = NULL;
2707 struct sockaddr_in addr;
2708 unsigned long flags;
2712 LASSERT (*kiblnd_tunables.kib_dev_failover > 1 ||
2713 dev->ibd_can_failover ||
2714 dev->ibd_hdev == NULL);
2716 rc = kiblnd_dev_need_failover(dev);
2720 if (dev->ibd_hdev != NULL &&
2721 dev->ibd_hdev->ibh_cmid != NULL) {
2722 /* XXX it's not good to close old listener at here,
2723 * because we can fail to create new listener.
2724 * But we have to close it now, otherwise rdma_bind_addr
2725 * will return EADDRINUSE... How crap! */
2726 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2728 cmid = dev->ibd_hdev->ibh_cmid;
2729 /* make next schedule of kiblnd_dev_need_failover()
2730 * return 1 for me */
2731 dev->ibd_hdev->ibh_cmid = NULL;
2732 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2734 rdma_destroy_id(cmid);
2737 cmid = kiblnd_rdma_create_id(kiblnd_cm_callback, dev, RDMA_PS_TCP,
2741 CERROR("Failed to create cmid for failover: %d\n", rc);
2745 memset(&addr, 0, sizeof(addr));
2746 addr.sin_family = AF_INET;
2747 addr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2748 addr.sin_port = htons(*kiblnd_tunables.kib_service);
2750 /* Bind to failover device or port */
2751 rc = rdma_bind_addr(cmid, (struct sockaddr *)&addr);
2752 if (rc != 0 || cmid->device == NULL) {
2753 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2754 dev->ibd_ifname, &dev->ibd_ifip,
2756 rdma_destroy_id(cmid);
2760 LIBCFS_ALLOC(hdev, sizeof(*hdev));
2762 CERROR("Failed to allocate kib_hca_dev\n");
2763 rdma_destroy_id(cmid);
2768 atomic_set(&hdev->ibh_ref, 1);
2769 hdev->ibh_dev = dev;
2770 hdev->ibh_cmid = cmid;
2771 hdev->ibh_ibdev = cmid->device;
2773 #ifdef HAVE_IB_ALLOC_PD_2ARGS
2774 pd = ib_alloc_pd(cmid->device, 0);
2776 pd = ib_alloc_pd(cmid->device);
2780 CERROR("Can't allocate PD: %d\n", rc);
2786 rc = rdma_listen(cmid, 0);
2788 CERROR("Can't start new listener: %d\n", rc);
2792 rc = kiblnd_hdev_get_attr(hdev);
2794 CERROR("Can't get device attributes: %d\n", rc);
2798 #ifdef HAVE_IB_GET_DMA_MR
2799 rc = kiblnd_hdev_setup_mrs(hdev);
2801 CERROR("Can't setup device: %d\n", rc);
2806 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2808 old = dev->ibd_hdev;
2809 dev->ibd_hdev = hdev; /* take over the refcount */
2812 list_for_each_entry(net, &dev->ibd_nets, ibn_list) {
2813 cfs_cpt_for_each(i, lnet_cpt_table()) {
2814 kiblnd_fail_poolset(&net->ibn_tx_ps[i]->tps_poolset,
2817 if (net->ibn_fmr_ps != NULL)
2818 kiblnd_fail_fmr_poolset(net->ibn_fmr_ps[i],
2823 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2825 if (!list_empty(&zombie_tpo))
2826 kiblnd_destroy_pool_list(&zombie_tpo);
2827 if (!list_empty(&zombie_ppo))
2828 kiblnd_destroy_pool_list(&zombie_ppo);
2829 if (!list_empty(&zombie_fpo))
2830 kiblnd_destroy_fmr_pool_list(&zombie_fpo);
2832 kiblnd_hdev_decref(hdev);
2835 dev->ibd_failed_failover++;
2837 dev->ibd_failed_failover = 0;
2843 kiblnd_destroy_dev (kib_dev_t *dev)
2845 LASSERT (dev->ibd_nnets == 0);
2846 LASSERT(list_empty(&dev->ibd_nets));
2848 list_del(&dev->ibd_fail_list);
2849 list_del(&dev->ibd_list);
2851 if (dev->ibd_hdev != NULL)
2852 kiblnd_hdev_decref(dev->ibd_hdev);
2854 LIBCFS_FREE(dev, sizeof(*dev));
2858 kiblnd_create_dev(char *ifname)
2860 struct net_device *netdev;
2867 rc = lnet_ipif_query(ifname, &up, &ip, &netmask);
2869 CERROR("Can't query IPoIB interface %s: %d\n",
2875 CERROR("Can't query IPoIB interface %s: it's down\n", ifname);
2879 LIBCFS_ALLOC(dev, sizeof(*dev));
2883 netdev = dev_get_by_name(&init_net, ifname);
2884 if (netdev == NULL) {
2885 dev->ibd_can_failover = 0;
2887 dev->ibd_can_failover = !!(netdev->flags & IFF_MASTER);
2891 INIT_LIST_HEAD(&dev->ibd_nets);
2892 INIT_LIST_HEAD(&dev->ibd_list); /* not yet in kib_devs */
2893 INIT_LIST_HEAD(&dev->ibd_fail_list);
2895 strcpy(&dev->ibd_ifname[0], ifname);
2897 /* initialize the device */
2898 rc = kiblnd_dev_failover(dev);
2900 CERROR("Can't initialize device: %d\n", rc);
2901 LIBCFS_FREE(dev, sizeof(*dev));
2905 list_add_tail(&dev->ibd_list,
2906 &kiblnd_data.kib_devs);
2911 kiblnd_base_shutdown(void)
2913 struct kib_sched_info *sched;
2916 LASSERT(list_empty(&kiblnd_data.kib_devs));
2918 CDEBUG(D_MALLOC, "before LND base cleanup: kmem %d\n",
2919 atomic_read(&libcfs_kmemory));
2921 switch (kiblnd_data.kib_init) {
2925 case IBLND_INIT_ALL:
2926 case IBLND_INIT_DATA:
2927 LASSERT (kiblnd_data.kib_peers != NULL);
2928 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
2929 LASSERT(list_empty(&kiblnd_data.kib_peers[i]));
2931 LASSERT(list_empty(&kiblnd_data.kib_connd_zombies));
2932 LASSERT(list_empty(&kiblnd_data.kib_connd_conns));
2933 LASSERT(list_empty(&kiblnd_data.kib_reconn_list));
2934 LASSERT(list_empty(&kiblnd_data.kib_reconn_wait));
2936 /* flag threads to terminate; wake and wait for them to die */
2937 kiblnd_data.kib_shutdown = 1;
2939 /* NB: we really want to stop scheduler threads net by net
2940 * instead of the whole module, this should be improved
2941 * with dynamic configuration LNet */
2942 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds)
2943 wake_up_all(&sched->ibs_waitq);
2945 wake_up_all(&kiblnd_data.kib_connd_waitq);
2946 wake_up_all(&kiblnd_data.kib_failover_waitq);
2949 while (atomic_read(&kiblnd_data.kib_nthreads) != 0) {
2952 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET,
2953 "Waiting for %d threads to terminate\n",
2954 atomic_read(&kiblnd_data.kib_nthreads));
2955 set_current_state(TASK_UNINTERRUPTIBLE);
2956 schedule_timeout(cfs_time_seconds(1));
2961 case IBLND_INIT_NOTHING:
2965 if (kiblnd_data.kib_peers != NULL) {
2966 LIBCFS_FREE(kiblnd_data.kib_peers,
2967 sizeof(struct list_head) *
2968 kiblnd_data.kib_peer_hash_size);
2971 if (kiblnd_data.kib_scheds != NULL)
2972 cfs_percpt_free(kiblnd_data.kib_scheds);
2974 CDEBUG(D_MALLOC, "after LND base cleanup: kmem %d\n",
2975 atomic_read(&libcfs_kmemory));
2977 kiblnd_data.kib_init = IBLND_INIT_NOTHING;
2978 module_put(THIS_MODULE);
2982 kiblnd_shutdown(struct lnet_ni *ni)
2984 kib_net_t *net = ni->ni_data;
2985 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2987 unsigned long flags;
2989 LASSERT(kiblnd_data.kib_init == IBLND_INIT_ALL);
2994 CDEBUG(D_MALLOC, "before LND net cleanup: kmem %d\n",
2995 atomic_read(&libcfs_kmemory));
2997 write_lock_irqsave(g_lock, flags);
2998 net->ibn_shutdown = 1;
2999 write_unlock_irqrestore(g_lock, flags);
3001 switch (net->ibn_init) {
3005 case IBLND_INIT_ALL:
3006 /* nuke all existing peers within this net */
3007 kiblnd_del_peer(ni, LNET_NID_ANY);
3009 /* Wait for all peer_ni state to clean up */
3011 while (atomic_read(&net->ibn_npeers) != 0) {
3014 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET,
3015 "%s: waiting for %d peers to disconnect\n",
3016 libcfs_nid2str(ni->ni_nid),
3017 atomic_read(&net->ibn_npeers));
3018 set_current_state(TASK_UNINTERRUPTIBLE);
3019 schedule_timeout(cfs_time_seconds(1));
3022 kiblnd_net_fini_pools(net);
3024 write_lock_irqsave(g_lock, flags);
3025 LASSERT(net->ibn_dev->ibd_nnets > 0);
3026 net->ibn_dev->ibd_nnets--;
3027 list_del(&net->ibn_list);
3028 write_unlock_irqrestore(g_lock, flags);
3032 case IBLND_INIT_NOTHING:
3033 LASSERT (atomic_read(&net->ibn_nconns) == 0);
3035 if (net->ibn_dev != NULL &&
3036 net->ibn_dev->ibd_nnets == 0)
3037 kiblnd_destroy_dev(net->ibn_dev);
3042 CDEBUG(D_MALLOC, "after LND net cleanup: kmem %d\n",
3043 atomic_read(&libcfs_kmemory));
3045 net->ibn_init = IBLND_INIT_NOTHING;
3048 LIBCFS_FREE(net, sizeof(*net));
3051 if (list_empty(&kiblnd_data.kib_devs))
3052 kiblnd_base_shutdown();
3057 kiblnd_base_startup(void)
3059 struct kib_sched_info *sched;
3063 LASSERT(kiblnd_data.kib_init == IBLND_INIT_NOTHING);
3065 try_module_get(THIS_MODULE);
3066 memset(&kiblnd_data, 0, sizeof(kiblnd_data)); /* zero pointers, flags etc */
3068 rwlock_init(&kiblnd_data.kib_global_lock);
3070 INIT_LIST_HEAD(&kiblnd_data.kib_devs);
3071 INIT_LIST_HEAD(&kiblnd_data.kib_failed_devs);
3073 kiblnd_data.kib_peer_hash_size = IBLND_PEER_HASH_SIZE;
3074 LIBCFS_ALLOC(kiblnd_data.kib_peers,
3075 sizeof(struct list_head) *
3076 kiblnd_data.kib_peer_hash_size);
3077 if (kiblnd_data.kib_peers == NULL)
3080 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++)
3081 INIT_LIST_HEAD(&kiblnd_data.kib_peers[i]);
3083 spin_lock_init(&kiblnd_data.kib_connd_lock);
3084 INIT_LIST_HEAD(&kiblnd_data.kib_connd_conns);
3085 INIT_LIST_HEAD(&kiblnd_data.kib_connd_zombies);
3086 INIT_LIST_HEAD(&kiblnd_data.kib_reconn_list);
3087 INIT_LIST_HEAD(&kiblnd_data.kib_reconn_wait);
3089 init_waitqueue_head(&kiblnd_data.kib_connd_waitq);
3090 init_waitqueue_head(&kiblnd_data.kib_failover_waitq);
3092 kiblnd_data.kib_scheds = cfs_percpt_alloc(lnet_cpt_table(),
3094 if (kiblnd_data.kib_scheds == NULL)
3097 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
3100 spin_lock_init(&sched->ibs_lock);
3101 INIT_LIST_HEAD(&sched->ibs_conns);
3102 init_waitqueue_head(&sched->ibs_waitq);
3104 nthrs = cfs_cpt_weight(lnet_cpt_table(), i);
3105 if (*kiblnd_tunables.kib_nscheds > 0) {
3106 nthrs = min(nthrs, *kiblnd_tunables.kib_nscheds);
3108 /* max to half of CPUs, another half is reserved for
3109 * upper layer modules */
3110 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
3113 sched->ibs_nthreads_max = nthrs;
3117 kiblnd_data.kib_error_qpa.qp_state = IB_QPS_ERR;
3119 /* lists/ptrs/locks initialised */
3120 kiblnd_data.kib_init = IBLND_INIT_DATA;
3121 /*****************************************************/
3123 rc = kiblnd_thread_start(kiblnd_connd, NULL, "kiblnd_connd");
3125 CERROR("Can't spawn o2iblnd connd: %d\n", rc);
3129 if (*kiblnd_tunables.kib_dev_failover != 0)
3130 rc = kiblnd_thread_start(kiblnd_failover_thread, NULL,
3134 CERROR("Can't spawn o2iblnd failover thread: %d\n", rc);
3138 /* flag everything initialised */
3139 kiblnd_data.kib_init = IBLND_INIT_ALL;
3140 /*****************************************************/
3145 kiblnd_base_shutdown();
3150 kiblnd_start_schedulers(struct kib_sched_info *sched)
3156 if (sched->ibs_nthreads == 0) {
3157 if (*kiblnd_tunables.kib_nscheds > 0) {
3158 nthrs = sched->ibs_nthreads_max;
3160 nthrs = cfs_cpt_weight(lnet_cpt_table(),
3162 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
3163 nthrs = min(IBLND_N_SCHED_HIGH, nthrs);
3166 LASSERT(sched->ibs_nthreads <= sched->ibs_nthreads_max);
3167 /* increase one thread if there is new interface */
3168 nthrs = (sched->ibs_nthreads < sched->ibs_nthreads_max);
3171 for (i = 0; i < nthrs; i++) {
3174 id = KIB_THREAD_ID(sched->ibs_cpt, sched->ibs_nthreads + i);
3175 snprintf(name, sizeof(name), "kiblnd_sd_%02ld_%02ld",
3176 KIB_THREAD_CPT(id), KIB_THREAD_TID(id));
3177 rc = kiblnd_thread_start(kiblnd_scheduler, (void *)id, name);
3181 CERROR("Can't spawn thread %d for scheduler[%d]: %d\n",
3182 sched->ibs_cpt, sched->ibs_nthreads + i, rc);
3186 sched->ibs_nthreads += i;
3191 kiblnd_dev_start_threads(kib_dev_t *dev, int newdev, __u32 *cpts, int ncpts)
3197 for (i = 0; i < ncpts; i++) {
3198 struct kib_sched_info *sched;
3200 cpt = (cpts == NULL) ? i : cpts[i];
3201 sched = kiblnd_data.kib_scheds[cpt];
3203 if (!newdev && sched->ibs_nthreads > 0)
3206 rc = kiblnd_start_schedulers(kiblnd_data.kib_scheds[cpt]);
3208 CERROR("Failed to start scheduler threads for %s\n",
3217 kiblnd_dev_search(char *ifname)
3219 kib_dev_t *alias = NULL;
3224 colon = strchr(ifname, ':');
3225 list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) {
3226 if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
3232 colon2 = strchr(dev->ibd_ifname, ':');
3238 if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
3250 kiblnd_startup(struct lnet_ni *ni)
3253 kib_dev_t *ibdev = NULL;
3255 unsigned long flags;
3260 LASSERT (ni->ni_net->net_lnd == &the_o2iblnd);
3262 if (kiblnd_data.kib_init == IBLND_INIT_NOTHING) {
3263 rc = kiblnd_base_startup();
3268 LIBCFS_ALLOC(net, sizeof(*net));
3273 net->ibn_incarnation = ktime_get_real_ns() / NSEC_PER_USEC;
3275 kiblnd_tunables_setup(ni);
3277 if (ni->ni_interfaces[0] != NULL) {
3278 /* Use the IPoIB interface specified in 'networks=' */
3280 CLASSERT(LNET_INTERFACES_NUM > 1);
3281 if (ni->ni_interfaces[1] != NULL) {
3282 CERROR("Multiple interfaces not supported\n");
3286 ifname = ni->ni_interfaces[0];
3288 ifname = *kiblnd_tunables.kib_default_ipif;
3291 if (strlen(ifname) >= sizeof(ibdev->ibd_ifname)) {
3292 CERROR("IPoIB interface name too long: %s\n", ifname);
3296 ibdev = kiblnd_dev_search(ifname);
3298 newdev = ibdev == NULL;
3299 /* hmm...create kib_dev even for alias */
3300 if (ibdev == NULL || strcmp(&ibdev->ibd_ifname[0], ifname) != 0)
3301 ibdev = kiblnd_create_dev(ifname);
3306 node_id = dev_to_node(ibdev->ibd_hdev->ibh_ibdev->dma_device);
3307 ni->ni_dev_cpt = cfs_cpt_of_node(lnet_cpt_table(), node_id);
3309 net->ibn_dev = ibdev;
3310 ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid), ibdev->ibd_ifip);
3312 rc = kiblnd_dev_start_threads(ibdev, newdev,
3313 ni->ni_cpts, ni->ni_ncpts);
3317 rc = kiblnd_net_init_pools(net, ni, ni->ni_cpts, ni->ni_ncpts);
3319 CERROR("Failed to initialize NI pools: %d\n", rc);
3323 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
3325 list_add_tail(&net->ibn_list, &ibdev->ibd_nets);
3326 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
3328 net->ibn_init = IBLND_INIT_ALL;
3333 if (net != NULL && net->ibn_dev == NULL && ibdev != NULL)
3334 kiblnd_destroy_dev(ibdev);
3336 kiblnd_shutdown(ni);
3338 CDEBUG(D_NET, "kiblnd_startup failed\n");
3342 static struct lnet_lnd the_o2iblnd = {
3343 .lnd_type = O2IBLND,
3344 .lnd_startup = kiblnd_startup,
3345 .lnd_shutdown = kiblnd_shutdown,
3346 .lnd_ctl = kiblnd_ctl,
3347 .lnd_query = kiblnd_query,
3348 .lnd_send = kiblnd_send,
3349 .lnd_recv = kiblnd_recv,
3352 static void __exit ko2iblnd_exit(void)
3354 lnet_unregister_lnd(&the_o2iblnd);
3357 static int __init ko2iblnd_init(void)
3361 CLASSERT(sizeof(kib_msg_t) <= IBLND_MSG_SIZE);
3362 CLASSERT(offsetof(kib_msg_t,
3363 ibm_u.get.ibgm_rd.rd_frags[IBLND_MAX_RDMA_FRAGS]) <=
3365 CLASSERT(offsetof(kib_msg_t,
3366 ibm_u.putack.ibpam_rd.rd_frags[IBLND_MAX_RDMA_FRAGS])
3369 rc = kiblnd_tunables_init();
3373 lnet_register_lnd(&the_o2iblnd);
3378 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3379 MODULE_DESCRIPTION("OpenIB gen2 LNet Network Driver");
3380 MODULE_VERSION("2.8.0");
3381 MODULE_LICENSE("GPL");
3383 module_init(ko2iblnd_init);
3384 module_exit(ko2iblnd_exit);