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/
31 * lnet/klnds/o2iblnd/o2iblnd.c
33 * Author: Eric Barton <eric@bartonsoftware.com>
37 #include <linux/inetdevice.h>
41 static const struct lnet_lnd the_o2iblnd;
43 struct kib_data kiblnd_data;
46 kiblnd_cksum (void *ptr, int nob)
52 sum = ((sum << 1) | (sum >> 31)) + *c++;
54 /* ensure I don't return 0 (== no checksum) */
55 return (sum == 0) ? 1 : sum;
59 kiblnd_msgtype2str(int type)
62 case IBLND_MSG_CONNREQ:
65 case IBLND_MSG_CONNACK:
71 case IBLND_MSG_IMMEDIATE:
74 case IBLND_MSG_PUT_REQ:
77 case IBLND_MSG_PUT_NAK:
80 case IBLND_MSG_PUT_ACK:
83 case IBLND_MSG_PUT_DONE:
86 case IBLND_MSG_GET_REQ:
89 case IBLND_MSG_GET_DONE:
98 kiblnd_msgtype2size(int type)
100 const int hdr_size = offsetof(struct kib_msg, ibm_u);
103 case IBLND_MSG_CONNREQ:
104 case IBLND_MSG_CONNACK:
105 return hdr_size + sizeof(struct kib_connparams);
110 case IBLND_MSG_IMMEDIATE:
111 return offsetof(struct kib_msg, ibm_u.immediate.ibim_payload[0]);
113 case IBLND_MSG_PUT_REQ:
114 return hdr_size + sizeof(struct kib_putreq_msg);
116 case IBLND_MSG_PUT_ACK:
117 return hdr_size + sizeof(struct kib_putack_msg);
119 case IBLND_MSG_GET_REQ:
120 return hdr_size + sizeof(struct kib_get_msg);
122 case IBLND_MSG_PUT_NAK:
123 case IBLND_MSG_PUT_DONE:
124 case IBLND_MSG_GET_DONE:
125 return hdr_size + sizeof(struct kib_completion_msg);
131 static int kiblnd_unpack_rd(struct kib_msg *msg, bool flip)
133 struct kib_rdma_desc *rd;
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(struct kib_msg, 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);
178 void kiblnd_pack_msg(struct lnet_ni *ni, struct kib_msg *msg, int version,
179 int credits, lnet_nid_t dstnid, __u64 dststamp)
181 struct kib_net *net = ni->ni_data;
183 /* CAVEAT EMPTOR! all message fields not set here should have been
184 * initialised previously. */
185 msg->ibm_magic = IBLND_MSG_MAGIC;
186 msg->ibm_version = version;
188 msg->ibm_credits = credits;
191 msg->ibm_srcnid = ni->ni_nid;
192 msg->ibm_srcstamp = net->ibn_incarnation;
193 msg->ibm_dstnid = dstnid;
194 msg->ibm_dststamp = dststamp;
196 if (*kiblnd_tunables.kib_cksum) {
197 /* NB ibm_cksum zero while computing cksum */
198 msg->ibm_cksum = kiblnd_cksum(msg, msg->ibm_nob);
202 int kiblnd_unpack_msg(struct kib_msg *msg, int nob)
204 const int hdr_size = offsetof(struct kib_msg, ibm_u);
210 /* 6 bytes are enough to have received magic + version */
212 CERROR("Short message: %d\n", nob);
216 if (msg->ibm_magic == IBLND_MSG_MAGIC) {
218 } else if (msg->ibm_magic == __swab32(IBLND_MSG_MAGIC)) {
221 CERROR("Bad magic: %08x\n", msg->ibm_magic);
225 version = flip ? __swab16(msg->ibm_version) : msg->ibm_version;
226 if (version != IBLND_MSG_VERSION &&
227 version != IBLND_MSG_VERSION_1) {
228 CERROR("Bad version: %x\n", version);
232 if (nob < hdr_size) {
233 CERROR("Short message: %d\n", nob);
237 msg_nob = flip ? __swab32(msg->ibm_nob) : msg->ibm_nob;
239 CERROR("Short message: got %d, wanted %d\n", nob, msg_nob);
243 /* checksum must be computed with ibm_cksum zero and BEFORE anything
246 msg_cksum = flip ? __swab32(msg->ibm_cksum) : msg->ibm_cksum;
248 if (msg_cksum != 0 &&
249 msg_cksum != kiblnd_cksum(msg, msg_nob)) {
250 CERROR("Bad checksum\n");
254 msg->ibm_cksum = msg_cksum;
257 /* leave magic unflipped as a clue to peer_ni endianness */
258 msg->ibm_version = version;
259 BUILD_BUG_ON(sizeof(msg->ibm_type) != 1);
260 BUILD_BUG_ON(sizeof(msg->ibm_credits) != 1);
261 msg->ibm_nob = msg_nob;
262 __swab64s(&msg->ibm_srcnid);
263 __swab64s(&msg->ibm_srcstamp);
264 __swab64s(&msg->ibm_dstnid);
265 __swab64s(&msg->ibm_dststamp);
268 if (msg->ibm_srcnid == LNET_NID_ANY) {
269 CERROR("Bad src nid: %s\n", libcfs_nid2str(msg->ibm_srcnid));
273 if (msg_nob < kiblnd_msgtype2size(msg->ibm_type)) {
274 CERROR("Short %s: %d(%d)\n", kiblnd_msgtype2str(msg->ibm_type),
275 msg_nob, kiblnd_msgtype2size(msg->ibm_type));
279 switch (msg->ibm_type) {
281 CERROR("Unknown message type %x\n", msg->ibm_type);
285 case IBLND_MSG_IMMEDIATE:
286 case IBLND_MSG_PUT_REQ:
289 case IBLND_MSG_PUT_ACK:
290 case IBLND_MSG_GET_REQ:
291 if (kiblnd_unpack_rd(msg, flip))
295 case IBLND_MSG_PUT_NAK:
296 case IBLND_MSG_PUT_DONE:
297 case IBLND_MSG_GET_DONE:
299 __swab32s(&msg->ibm_u.completion.ibcm_status);
302 case IBLND_MSG_CONNREQ:
303 case IBLND_MSG_CONNACK:
305 __swab16s(&msg->ibm_u.connparams.ibcp_queue_depth);
306 __swab16s(&msg->ibm_u.connparams.ibcp_max_frags);
307 __swab32s(&msg->ibm_u.connparams.ibcp_max_msg_size);
315 kiblnd_create_peer(struct lnet_ni *ni, struct kib_peer_ni **peerp,
318 struct kib_peer_ni *peer_ni;
319 struct kib_net *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));
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 peer_ni->ibp_queue_depth_mod = 0; /* try to use the default */
339 atomic_set(&peer_ni->ibp_refcount, 1); /* 1 ref for caller */
341 INIT_HLIST_NODE(&peer_ni->ibp_list);
342 INIT_LIST_HEAD(&peer_ni->ibp_conns);
343 INIT_LIST_HEAD(&peer_ni->ibp_tx_queue);
345 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
347 /* always called with a ref on ni, which prevents ni being shutdown */
348 LASSERT(net->ibn_shutdown == 0);
350 /* npeers only grows with the global lock held */
351 atomic_inc(&net->ibn_npeers);
353 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
360 kiblnd_destroy_peer(struct kib_peer_ni *peer_ni)
362 struct kib_net *net = peer_ni->ibp_ni->ni_data;
364 LASSERT(net != NULL);
365 LASSERT (atomic_read(&peer_ni->ibp_refcount) == 0);
366 LASSERT(!kiblnd_peer_active(peer_ni));
367 LASSERT(kiblnd_peer_idle(peer_ni));
368 LASSERT(list_empty(&peer_ni->ibp_tx_queue));
370 LIBCFS_FREE(peer_ni, sizeof(*peer_ni));
372 /* NB a peer_ni's connections keep a reference on their peer_ni until
373 * they are destroyed, so we can be assured that _all_ state to do
374 * with this peer_ni has been cleaned up when its refcount drops to
377 if (atomic_dec_and_test(&net->ibn_npeers))
378 wake_up_var(&net->ibn_npeers);
382 kiblnd_find_peer_locked(struct lnet_ni *ni, lnet_nid_t nid)
384 /* the caller is responsible for accounting the additional reference
387 struct kib_peer_ni *peer_ni;
389 hash_for_each_possible(kiblnd_data.kib_peers, peer_ni,
391 LASSERT(!kiblnd_peer_idle(peer_ni));
394 * Match a peer if its NID and the NID of the local NI it
395 * communicates over are the same. Otherwise don't match
396 * the peer, which will result in a new lnd peer being
399 if (peer_ni->ibp_nid != nid ||
400 peer_ni->ibp_ni->ni_nid != ni->ni_nid)
403 CDEBUG(D_NET, "got peer_ni [%p] -> %s (%d) version: %x\n",
404 peer_ni, libcfs_nid2str(nid),
405 atomic_read(&peer_ni->ibp_refcount),
406 peer_ni->ibp_version);
413 kiblnd_unlink_peer_locked(struct kib_peer_ni *peer_ni)
415 LASSERT(list_empty(&peer_ni->ibp_conns));
417 LASSERT(kiblnd_peer_active(peer_ni));
418 hlist_del_init(&peer_ni->ibp_list);
419 /* lose peerlist's ref */
420 kiblnd_peer_decref(peer_ni);
424 kiblnd_get_peer_info(struct lnet_ni *ni, int index,
425 lnet_nid_t *nidp, int *count)
427 struct kib_peer_ni *peer_ni;
431 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
433 hash_for_each(kiblnd_data.kib_peers, i, peer_ni, ibp_list) {
434 LASSERT(!kiblnd_peer_idle(peer_ni));
436 if (peer_ni->ibp_ni != ni)
442 *nidp = peer_ni->ibp_nid;
443 *count = atomic_read(&peer_ni->ibp_refcount);
445 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
449 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
454 kiblnd_del_peer_locked(struct kib_peer_ni *peer_ni)
456 struct kib_conn *cnxt;
457 struct kib_conn *conn;
459 if (list_empty(&peer_ni->ibp_conns)) {
460 kiblnd_unlink_peer_locked(peer_ni);
462 list_for_each_entry_safe(conn, cnxt, &peer_ni->ibp_conns,
464 kiblnd_close_conn_locked(conn, 0);
465 /* NB closing peer_ni's last conn unlinked it. */
467 /* NB peer_ni now unlinked; might even be freed if the peer_ni table had the
472 kiblnd_del_peer(struct lnet_ni *ni, lnet_nid_t nid)
475 struct hlist_node *pnxt;
476 struct kib_peer_ni *peer_ni;
483 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
485 if (nid != LNET_NID_ANY) {
486 lo = hash_min(nid, HASH_BITS(kiblnd_data.kib_peers));
490 hi = HASH_SIZE(kiblnd_data.kib_peers) - 1;
493 for (i = lo; i <= hi; i++) {
494 hlist_for_each_entry_safe(peer_ni, pnxt,
495 &kiblnd_data.kib_peers[i], ibp_list) {
496 LASSERT(!kiblnd_peer_idle(peer_ni));
498 if (peer_ni->ibp_ni != ni)
501 if (!(nid == LNET_NID_ANY || peer_ni->ibp_nid == nid))
504 if (!list_empty(&peer_ni->ibp_tx_queue)) {
505 LASSERT(list_empty(&peer_ni->ibp_conns));
507 list_splice_init(&peer_ni->ibp_tx_queue,
511 kiblnd_del_peer_locked(peer_ni);
512 rc = 0; /* matched something */
516 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
518 kiblnd_txlist_done(&zombies, -EIO, LNET_MSG_STATUS_LOCAL_ERROR);
523 static struct kib_conn *
524 kiblnd_get_conn_by_idx(struct lnet_ni *ni, int index)
526 struct kib_peer_ni *peer_ni;
527 struct kib_conn *conn;
528 struct list_head *ctmp;
532 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
534 hash_for_each(kiblnd_data.kib_peers, i, peer_ni, ibp_list) {
535 LASSERT(!kiblnd_peer_idle(peer_ni));
537 if (peer_ni->ibp_ni != ni)
540 list_for_each(ctmp, &peer_ni->ibp_conns) {
544 conn = list_entry(ctmp, struct kib_conn, ibc_list);
545 kiblnd_conn_addref(conn);
546 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
552 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
557 kiblnd_debug_rx(struct kib_rx *rx)
559 CDEBUG(D_CONSOLE, " %p msg_type %x cred %d\n",
560 rx, rx->rx_msg->ibm_type,
561 rx->rx_msg->ibm_credits);
565 kiblnd_debug_tx(struct kib_tx *tx)
567 CDEBUG(D_CONSOLE, " %p snd %d q %d w %d rc %d dl %lld "
568 "cookie %#llx msg %s%s type %x cred %d\n",
569 tx, tx->tx_sending, tx->tx_queued, tx->tx_waiting,
570 tx->tx_status, ktime_to_ns(tx->tx_deadline), tx->tx_cookie,
571 tx->tx_lntmsg[0] == NULL ? "-" : "!",
572 tx->tx_lntmsg[1] == NULL ? "-" : "!",
573 tx->tx_msg->ibm_type, tx->tx_msg->ibm_credits);
577 kiblnd_debug_conn(struct kib_conn *conn)
579 struct list_head *tmp;
582 spin_lock(&conn->ibc_lock);
584 CDEBUG(D_CONSOLE, "conn[%d] %p [version %x] -> %s:\n",
585 atomic_read(&conn->ibc_refcount), conn,
586 conn->ibc_version, libcfs_nid2str(conn->ibc_peer->ibp_nid));
587 CDEBUG(D_CONSOLE, " state %d nposted %d/%d cred %d o_cred %d "
588 " r_cred %d\n", conn->ibc_state, conn->ibc_noops_posted,
589 conn->ibc_nsends_posted, conn->ibc_credits,
590 conn->ibc_outstanding_credits, conn->ibc_reserved_credits);
591 CDEBUG(D_CONSOLE, " comms_err %d\n", conn->ibc_comms_error);
593 CDEBUG(D_CONSOLE, " early_rxs:\n");
594 list_for_each(tmp, &conn->ibc_early_rxs)
595 kiblnd_debug_rx(list_entry(tmp, struct kib_rx, rx_list));
597 CDEBUG(D_CONSOLE, " tx_noops:\n");
598 list_for_each(tmp, &conn->ibc_tx_noops)
599 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
601 CDEBUG(D_CONSOLE, " tx_queue_nocred:\n");
602 list_for_each(tmp, &conn->ibc_tx_queue_nocred)
603 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
605 CDEBUG(D_CONSOLE, " tx_queue_rsrvd:\n");
606 list_for_each(tmp, &conn->ibc_tx_queue_rsrvd)
607 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
609 CDEBUG(D_CONSOLE, " tx_queue:\n");
610 list_for_each(tmp, &conn->ibc_tx_queue)
611 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
613 CDEBUG(D_CONSOLE, " active_txs:\n");
614 list_for_each(tmp, &conn->ibc_active_txs)
615 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
617 CDEBUG(D_CONSOLE, " rxs:\n");
618 for (i = 0; i < IBLND_RX_MSGS(conn); i++)
619 kiblnd_debug_rx(&conn->ibc_rxs[i]);
621 spin_unlock(&conn->ibc_lock);
625 kiblnd_setup_mtu_locked(struct rdma_cm_id *cmid)
627 /* XXX There is no path record for iWARP, set by netdev->change_mtu? */
628 if (cmid->route.path_rec == NULL)
631 if (*kiblnd_tunables.kib_ib_mtu)
632 cmid->route.path_rec->mtu =
633 ib_mtu_int_to_enum(*kiblnd_tunables.kib_ib_mtu);
637 kiblnd_get_completion_vector(struct kib_conn *conn, int cpt)
645 vectors = conn->ibc_cmid->device->num_comp_vectors;
649 mask = cfs_cpt_cpumask(lnet_cpt_table(), cpt);
651 /* hash NID to CPU id in this partition... */
652 ibp_nid = conn->ibc_peer->ibp_nid;
653 off = do_div(ibp_nid, cpumask_weight(*mask));
654 for_each_cpu(i, *mask) {
664 * Get the scheduler bound to this CPT. If the scheduler has no
665 * threads, which means that the CPT has no CPUs, then grab the
666 * next scheduler that we can use.
668 * This case would be triggered if a NUMA node is configured with
669 * no associated CPUs.
671 static struct kib_sched_info *
672 kiblnd_get_scheduler(int cpt)
674 struct kib_sched_info *sched;
677 sched = kiblnd_data.kib_scheds[cpt];
679 if (sched->ibs_nthreads > 0)
682 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
683 if (sched->ibs_nthreads > 0) {
684 CDEBUG(D_NET, "scheduler[%d] has no threads. selected scheduler[%d]\n",
685 cpt, sched->ibs_cpt);
693 static unsigned int kiblnd_send_wrs(struct kib_conn *conn)
696 * One WR for the LNet message
697 * And ibc_max_frags for the transfer WRs
700 int multiplier = 1 + conn->ibc_max_frags;
701 enum kib_dev_caps dev_caps = conn->ibc_hdev->ibh_dev->ibd_dev_caps;
703 /* FastReg needs two extra WRs for map and invalidate */
704 if (dev_caps & IBLND_DEV_CAPS_FASTREG_ENABLED)
707 /* account for a maximum of ibc_queue_depth in-flight transfers */
708 ret = multiplier * conn->ibc_queue_depth;
710 if (ret > conn->ibc_hdev->ibh_max_qp_wr) {
711 CDEBUG(D_NET, "peer_credits %u will result in send work "
712 "request size %d larger than maximum %d device "
713 "can handle\n", conn->ibc_queue_depth, ret,
714 conn->ibc_hdev->ibh_max_qp_wr);
715 conn->ibc_queue_depth =
716 conn->ibc_hdev->ibh_max_qp_wr / multiplier;
719 /* don't go beyond the maximum the device can handle */
720 return min(ret, conn->ibc_hdev->ibh_max_qp_wr);
724 kiblnd_create_conn(struct kib_peer_ni *peer_ni, struct rdma_cm_id *cmid,
725 int state, int version)
728 * If the new conn is created successfully it takes over the caller's
729 * ref on 'peer_ni'. It also "owns" 'cmid' and destroys it when it itself
730 * is destroyed. On failure, the caller's ref on 'peer_ni' remains and
731 * she must dispose of 'cmid'. (Actually I'd block forever if I tried
732 * to destroy 'cmid' here since I'm called from the CM which still has
733 * its ref on 'cmid'). */
734 rwlock_t *glock = &kiblnd_data.kib_global_lock;
735 struct kib_net *net = peer_ni->ibp_ni->ni_data;
737 struct ib_qp_init_attr init_qp_attr = {};
738 struct kib_sched_info *sched;
739 #ifdef HAVE_IB_CQ_INIT_ATTR
740 struct ib_cq_init_attr cq_attr = {};
742 struct kib_conn *conn;
749 LASSERT(net != NULL);
750 LASSERT(!in_interrupt());
754 cpt = lnet_cpt_of_nid(peer_ni->ibp_nid, peer_ni->ibp_ni);
755 sched = kiblnd_get_scheduler(cpt);
758 CERROR("no schedulers available. node is unhealthy\n");
763 * The cpt might have changed if we ended up selecting a non cpt
764 * native scheduler. So use the scheduler's cpt instead.
766 cpt = sched->ibs_cpt;
768 LIBCFS_CPT_ALLOC(conn, lnet_cpt_table(), cpt, sizeof(*conn));
770 CERROR("Can't allocate connection for %s\n",
771 libcfs_nid2str(peer_ni->ibp_nid));
775 conn->ibc_state = IBLND_CONN_INIT;
776 conn->ibc_version = version;
777 conn->ibc_peer = peer_ni; /* I take the caller's ref */
778 cmid->context = conn; /* for future CM callbacks */
779 conn->ibc_cmid = cmid;
780 conn->ibc_max_frags = peer_ni->ibp_max_frags;
781 conn->ibc_queue_depth = peer_ni->ibp_queue_depth;
782 conn->ibc_rxs = NULL;
783 conn->ibc_rx_pages = NULL;
785 INIT_LIST_HEAD(&conn->ibc_early_rxs);
786 INIT_LIST_HEAD(&conn->ibc_tx_noops);
787 INIT_LIST_HEAD(&conn->ibc_tx_queue);
788 INIT_LIST_HEAD(&conn->ibc_tx_queue_rsrvd);
789 INIT_LIST_HEAD(&conn->ibc_tx_queue_nocred);
790 INIT_LIST_HEAD(&conn->ibc_active_txs);
791 INIT_LIST_HEAD(&conn->ibc_zombie_txs);
792 spin_lock_init(&conn->ibc_lock);
794 LIBCFS_CPT_ALLOC(conn->ibc_connvars, lnet_cpt_table(), cpt,
795 sizeof(*conn->ibc_connvars));
796 if (conn->ibc_connvars == NULL) {
797 CERROR("Can't allocate in-progress connection state\n");
801 write_lock_irqsave(glock, flags);
802 if (dev->ibd_failover) {
803 write_unlock_irqrestore(glock, flags);
804 CERROR("%s: failover in progress\n", dev->ibd_ifname);
808 if (dev->ibd_hdev->ibh_ibdev != cmid->device) {
809 /* wakeup failover thread and teardown connection */
810 if (kiblnd_dev_can_failover(dev)) {
811 list_add_tail(&dev->ibd_fail_list,
812 &kiblnd_data.kib_failed_devs);
813 wake_up(&kiblnd_data.kib_failover_waitq);
816 write_unlock_irqrestore(glock, flags);
817 CERROR("cmid HCA(%s), kib_dev(%s) need failover\n",
818 cmid->device->name, dev->ibd_ifname);
822 kiblnd_hdev_addref_locked(dev->ibd_hdev);
823 conn->ibc_hdev = dev->ibd_hdev;
825 kiblnd_setup_mtu_locked(cmid);
827 write_unlock_irqrestore(glock, flags);
829 #ifdef HAVE_IB_CQ_INIT_ATTR
830 cq_attr.cqe = IBLND_CQ_ENTRIES(conn);
831 cq_attr.comp_vector = kiblnd_get_completion_vector(conn, cpt);
832 cq = ib_create_cq(cmid->device,
833 kiblnd_cq_completion, kiblnd_cq_event, conn,
836 cq = ib_create_cq(cmid->device,
837 kiblnd_cq_completion, kiblnd_cq_event, conn,
838 IBLND_CQ_ENTRIES(conn),
839 kiblnd_get_completion_vector(conn, cpt));
843 * on MLX-5 (possibly MLX-4 as well) this error could be
844 * hit if the concurrent_sends and/or peer_tx_credits is set
845 * too high. Or due to an MLX-5 bug which tries to
846 * allocate 256kb via kmalloc for WR cookie array
848 CERROR("Failed to create CQ with %d CQEs: %ld\n",
849 IBLND_CQ_ENTRIES(conn), PTR_ERR(cq));
855 rc = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
857 CERROR("Can't request completion notification: %d\n", rc);
861 init_qp_attr.event_handler = kiblnd_qp_event;
862 init_qp_attr.qp_context = conn;
863 init_qp_attr.cap.max_send_sge = *kiblnd_tunables.kib_wrq_sge;
864 init_qp_attr.cap.max_recv_sge = 1;
865 init_qp_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
866 init_qp_attr.qp_type = IB_QPT_RC;
867 init_qp_attr.send_cq = cq;
868 init_qp_attr.recv_cq = cq;
870 if (peer_ni->ibp_queue_depth_mod &&
871 peer_ni->ibp_queue_depth_mod < peer_ni->ibp_queue_depth) {
872 conn->ibc_queue_depth = peer_ni->ibp_queue_depth_mod;
873 CDEBUG(D_NET, "Use reduced queue depth %u (from %u)\n",
874 peer_ni->ibp_queue_depth_mod,
875 peer_ni->ibp_queue_depth);
879 /* kiblnd_send_wrs() can change the connection's queue depth if
880 * the maximum work requests for the device is maxed out
882 init_qp_attr.cap.max_send_wr = kiblnd_send_wrs(conn);
883 init_qp_attr.cap.max_recv_wr = IBLND_RECV_WRS(conn);
884 rc = rdma_create_qp(cmid, conn->ibc_hdev->ibh_pd,
886 if (rc != -ENOMEM || conn->ibc_queue_depth < 2)
888 conn->ibc_queue_depth--;
892 CERROR("Can't create QP: %d, send_wr: %d, recv_wr: %d, "
893 "send_sge: %d, recv_sge: %d\n",
894 rc, init_qp_attr.cap.max_send_wr,
895 init_qp_attr.cap.max_recv_wr,
896 init_qp_attr.cap.max_send_sge,
897 init_qp_attr.cap.max_recv_sge);
901 conn->ibc_sched = sched;
903 if (!peer_ni->ibp_queue_depth_mod &&
904 conn->ibc_queue_depth != peer_ni->ibp_queue_depth) {
905 CWARN("peer %s - queue depth reduced from %u to %u"
906 " to allow for qp creation\n",
907 libcfs_nid2str(peer_ni->ibp_nid),
908 peer_ni->ibp_queue_depth,
909 conn->ibc_queue_depth);
910 peer_ni->ibp_queue_depth_mod = conn->ibc_queue_depth;
913 LIBCFS_CPT_ALLOC(conn->ibc_rxs, lnet_cpt_table(), cpt,
914 IBLND_RX_MSGS(conn) * sizeof(struct kib_rx));
915 if (conn->ibc_rxs == NULL) {
916 CERROR("Cannot allocate RX buffers\n");
920 rc = kiblnd_alloc_pages(&conn->ibc_rx_pages, cpt,
921 IBLND_RX_MSG_PAGES(conn));
925 kiblnd_map_rx_descs(conn);
927 /* 1 ref for caller and each rxmsg */
928 atomic_set(&conn->ibc_refcount, 1 + IBLND_RX_MSGS(conn));
929 conn->ibc_nrx = IBLND_RX_MSGS(conn);
932 for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
933 rc = kiblnd_post_rx(&conn->ibc_rxs[i], IBLND_POSTRX_NO_CREDIT);
935 CERROR("Can't post rxmsg: %d\n", rc);
937 /* Make posted receives complete */
938 kiblnd_abort_receives(conn);
940 /* correct # of posted buffers
941 * NB locking needed now I'm racing with completion */
942 spin_lock_irqsave(&sched->ibs_lock, flags);
943 conn->ibc_nrx -= IBLND_RX_MSGS(conn) - i;
944 spin_unlock_irqrestore(&sched->ibs_lock, flags);
946 /* cmid will be destroyed by CM(ofed) after cm_callback
947 * returned, so we can't refer it anymore
948 * (by kiblnd_connd()->kiblnd_destroy_conn) */
949 rdma_destroy_qp(conn->ibc_cmid);
950 conn->ibc_cmid = NULL;
952 /* Drop my own and unused rxbuffer refcounts */
953 while (i++ <= IBLND_RX_MSGS(conn))
954 kiblnd_conn_decref(conn);
960 /* Init successful! */
961 LASSERT (state == IBLND_CONN_ACTIVE_CONNECT ||
962 state == IBLND_CONN_PASSIVE_WAIT);
963 conn->ibc_state = state;
966 atomic_inc(&net->ibn_nconns);
970 kiblnd_destroy_conn(conn);
971 LIBCFS_FREE(conn, sizeof(*conn));
977 kiblnd_destroy_conn(struct kib_conn *conn)
979 struct rdma_cm_id *cmid = conn->ibc_cmid;
980 struct kib_peer_ni *peer_ni = conn->ibc_peer;
982 LASSERT (!in_interrupt());
983 LASSERT (atomic_read(&conn->ibc_refcount) == 0);
984 LASSERT(list_empty(&conn->ibc_early_rxs));
985 LASSERT(list_empty(&conn->ibc_tx_noops));
986 LASSERT(list_empty(&conn->ibc_tx_queue));
987 LASSERT(list_empty(&conn->ibc_tx_queue_rsrvd));
988 LASSERT(list_empty(&conn->ibc_tx_queue_nocred));
989 LASSERT(list_empty(&conn->ibc_active_txs));
990 LASSERT (conn->ibc_noops_posted == 0);
991 LASSERT (conn->ibc_nsends_posted == 0);
993 switch (conn->ibc_state) {
995 /* conn must be completely disengaged from the network */
998 case IBLND_CONN_DISCONNECTED:
999 /* connvars should have been freed already */
1000 LASSERT (conn->ibc_connvars == NULL);
1003 case IBLND_CONN_INIT:
1007 /* conn->ibc_cmid might be destroyed by CM already */
1008 if (cmid != NULL && cmid->qp != NULL)
1009 rdma_destroy_qp(cmid);
1012 ib_destroy_cq(conn->ibc_cq);
1014 kiblnd_txlist_done(&conn->ibc_zombie_txs, -ECONNABORTED,
1015 LNET_MSG_STATUS_OK);
1017 if (conn->ibc_rx_pages != NULL)
1018 kiblnd_unmap_rx_descs(conn);
1020 if (conn->ibc_rxs != NULL)
1021 CFS_FREE_PTR_ARRAY(conn->ibc_rxs, IBLND_RX_MSGS(conn));
1023 if (conn->ibc_connvars != NULL)
1024 LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
1026 if (conn->ibc_hdev != NULL)
1027 kiblnd_hdev_decref(conn->ibc_hdev);
1029 /* See CAVEAT EMPTOR above in kiblnd_create_conn */
1030 if (conn->ibc_state != IBLND_CONN_INIT) {
1031 struct kib_net *net = peer_ni->ibp_ni->ni_data;
1033 kiblnd_peer_decref(peer_ni);
1034 rdma_destroy_id(cmid);
1035 atomic_dec(&net->ibn_nconns);
1040 kiblnd_close_peer_conns_locked(struct kib_peer_ni *peer_ni, int why)
1042 struct kib_conn *conn;
1043 struct kib_conn *cnxt;
1046 list_for_each_entry_safe(conn, cnxt, &peer_ni->ibp_conns,
1048 CDEBUG(D_NET, "Closing conn -> %s, "
1049 "version: %x, reason: %d\n",
1050 libcfs_nid2str(peer_ni->ibp_nid),
1051 conn->ibc_version, why);
1053 kiblnd_close_conn_locked(conn, why);
1061 kiblnd_close_stale_conns_locked(struct kib_peer_ni *peer_ni,
1062 int version, __u64 incarnation)
1064 struct kib_conn *conn;
1065 struct kib_conn *cnxt;
1068 list_for_each_entry_safe(conn, cnxt, &peer_ni->ibp_conns,
1070 if (conn->ibc_version == version &&
1071 conn->ibc_incarnation == incarnation)
1074 CDEBUG(D_NET, "Closing stale conn -> %s version: %x, "
1075 "incarnation:%#llx(%x, %#llx)\n",
1076 libcfs_nid2str(peer_ni->ibp_nid),
1077 conn->ibc_version, conn->ibc_incarnation,
1078 version, incarnation);
1080 kiblnd_close_conn_locked(conn, -ESTALE);
1088 kiblnd_close_matching_conns(struct lnet_ni *ni, lnet_nid_t nid)
1090 struct kib_peer_ni *peer_ni;
1091 struct hlist_node *pnxt;
1095 unsigned long flags;
1098 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1100 if (nid != LNET_NID_ANY) {
1101 lo = hash_min(nid, HASH_BITS(kiblnd_data.kib_peers));
1105 hi = HASH_SIZE(kiblnd_data.kib_peers) - 1;
1108 for (i = lo; i <= hi; i++) {
1109 hlist_for_each_entry_safe(peer_ni, pnxt,
1110 &kiblnd_data.kib_peers[i], ibp_list) {
1111 LASSERT(!kiblnd_peer_idle(peer_ni));
1113 if (peer_ni->ibp_ni != ni)
1116 if (!(nid == LNET_NID_ANY || nid == peer_ni->ibp_nid))
1119 count += kiblnd_close_peer_conns_locked(peer_ni, 0);
1123 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1125 /* wildcards always succeed */
1126 if (nid == LNET_NID_ANY)
1129 return (count == 0) ? -ENOENT : 0;
1133 kiblnd_ctl(struct lnet_ni *ni, unsigned int cmd, void *arg)
1135 struct libcfs_ioctl_data *data = arg;
1139 case IOC_LIBCFS_GET_PEER: {
1143 rc = kiblnd_get_peer_info(ni, data->ioc_count,
1145 data->ioc_nid = nid;
1146 data->ioc_count = count;
1150 case IOC_LIBCFS_DEL_PEER: {
1151 rc = kiblnd_del_peer(ni, data->ioc_nid);
1154 case IOC_LIBCFS_GET_CONN: {
1155 struct kib_conn *conn;
1158 conn = kiblnd_get_conn_by_idx(ni, data->ioc_count);
1164 LASSERT(conn->ibc_cmid != NULL);
1165 data->ioc_nid = conn->ibc_peer->ibp_nid;
1166 if (conn->ibc_cmid->route.path_rec == NULL)
1167 data->ioc_u32[0] = 0; /* iWarp has no path MTU */
1170 ib_mtu_enum_to_int(conn->ibc_cmid->route.path_rec->mtu);
1171 kiblnd_conn_decref(conn);
1174 case IOC_LIBCFS_CLOSE_CONNECTION: {
1175 rc = kiblnd_close_matching_conns(ni, data->ioc_nid);
1187 kiblnd_free_pages(struct kib_pages *p)
1189 int npages = p->ibp_npages;
1192 for (i = 0; i < npages; i++) {
1193 if (p->ibp_pages[i] != NULL)
1194 __free_page(p->ibp_pages[i]);
1197 LIBCFS_FREE(p, offsetof(struct kib_pages, ibp_pages[npages]));
1201 kiblnd_alloc_pages(struct kib_pages **pp, int cpt, int npages)
1203 struct kib_pages *p;
1206 LIBCFS_CPT_ALLOC(p, lnet_cpt_table(), cpt,
1207 offsetof(struct kib_pages, ibp_pages[npages]));
1209 CERROR("Can't allocate descriptor for %d pages\n", npages);
1213 memset(p, 0, offsetof(struct kib_pages, ibp_pages[npages]));
1214 p->ibp_npages = npages;
1216 for (i = 0; i < npages; i++) {
1217 p->ibp_pages[i] = cfs_page_cpt_alloc(lnet_cpt_table(), cpt,
1219 if (p->ibp_pages[i] == NULL) {
1220 CERROR("Can't allocate page %d of %d\n", i, npages);
1221 kiblnd_free_pages(p);
1231 kiblnd_unmap_rx_descs(struct kib_conn *conn)
1236 LASSERT (conn->ibc_rxs != NULL);
1237 LASSERT (conn->ibc_hdev != NULL);
1239 for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
1240 rx = &conn->ibc_rxs[i];
1242 LASSERT(rx->rx_nob >= 0); /* not posted */
1244 kiblnd_dma_unmap_single(conn->ibc_hdev->ibh_ibdev,
1245 KIBLND_UNMAP_ADDR(rx, rx_msgunmap,
1247 IBLND_MSG_SIZE, DMA_FROM_DEVICE);
1250 kiblnd_free_pages(conn->ibc_rx_pages);
1252 conn->ibc_rx_pages = NULL;
1256 kiblnd_map_rx_descs(struct kib_conn *conn)
1264 for (pg_off = ipg = i = 0; i < IBLND_RX_MSGS(conn); i++) {
1265 pg = conn->ibc_rx_pages->ibp_pages[ipg];
1266 rx = &conn->ibc_rxs[i];
1269 rx->rx_msg = (struct kib_msg *)(((char *)page_address(pg)) + pg_off);
1272 kiblnd_dma_map_single(conn->ibc_hdev->ibh_ibdev,
1273 rx->rx_msg, IBLND_MSG_SIZE,
1275 LASSERT(!kiblnd_dma_mapping_error(conn->ibc_hdev->ibh_ibdev,
1277 KIBLND_UNMAP_ADDR_SET(rx, rx_msgunmap, rx->rx_msgaddr);
1279 CDEBUG(D_NET, "rx %d: %p %#llx(%#llx)\n",
1280 i, rx->rx_msg, rx->rx_msgaddr,
1281 (__u64)(page_to_phys(pg) + pg_off));
1283 pg_off += IBLND_MSG_SIZE;
1284 LASSERT(pg_off <= PAGE_SIZE);
1286 if (pg_off == PAGE_SIZE) {
1289 LASSERT(ipg <= IBLND_RX_MSG_PAGES(conn));
1295 kiblnd_unmap_tx_pool(struct kib_tx_pool *tpo)
1297 struct kib_hca_dev *hdev = tpo->tpo_hdev;
1301 LASSERT (tpo->tpo_pool.po_allocated == 0);
1306 for (i = 0; i < tpo->tpo_pool.po_size; i++) {
1307 tx = &tpo->tpo_tx_descs[i];
1308 kiblnd_dma_unmap_single(hdev->ibh_ibdev,
1309 KIBLND_UNMAP_ADDR(tx, tx_msgunmap,
1311 IBLND_MSG_SIZE, DMA_TO_DEVICE);
1314 kiblnd_hdev_decref(hdev);
1315 tpo->tpo_hdev = NULL;
1318 static struct kib_hca_dev *
1319 kiblnd_current_hdev(struct kib_dev *dev)
1321 struct kib_hca_dev *hdev;
1322 unsigned long flags;
1325 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1326 while (dev->ibd_failover) {
1327 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1329 CDEBUG(D_NET, "%s: Wait for failover\n",
1331 schedule_timeout_interruptible(cfs_time_seconds(1) / 100);
1333 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1336 kiblnd_hdev_addref_locked(dev->ibd_hdev);
1337 hdev = dev->ibd_hdev;
1339 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1345 kiblnd_map_tx_pool(struct kib_tx_pool *tpo)
1347 struct kib_pages *txpgs = tpo->tpo_tx_pages;
1348 struct kib_pool *pool = &tpo->tpo_pool;
1349 struct kib_net *net = pool->po_owner->ps_net;
1350 struct kib_dev *dev;
1357 LASSERT (net != NULL);
1361 /* pre-mapped messages are not bigger than 1 page */
1362 BUILD_BUG_ON(IBLND_MSG_SIZE > PAGE_SIZE);
1364 /* No fancy arithmetic when we do the buffer calculations */
1365 BUILD_BUG_ON(PAGE_SIZE % IBLND_MSG_SIZE != 0);
1367 tpo->tpo_hdev = kiblnd_current_hdev(dev);
1369 for (ipage = page_offset = i = 0; i < pool->po_size; i++) {
1370 page = txpgs->ibp_pages[ipage];
1371 tx = &tpo->tpo_tx_descs[i];
1373 tx->tx_msg = (struct kib_msg *)(((char *)page_address(page)) +
1376 tx->tx_msgaddr = kiblnd_dma_map_single(tpo->tpo_hdev->ibh_ibdev,
1380 LASSERT(!kiblnd_dma_mapping_error(tpo->tpo_hdev->ibh_ibdev,
1382 KIBLND_UNMAP_ADDR_SET(tx, tx_msgunmap, tx->tx_msgaddr);
1384 list_add(&tx->tx_list, &pool->po_free_list);
1386 page_offset += IBLND_MSG_SIZE;
1387 LASSERT(page_offset <= PAGE_SIZE);
1389 if (page_offset == PAGE_SIZE) {
1392 LASSERT(ipage <= txpgs->ibp_npages);
1398 kiblnd_destroy_fmr_pool(struct kib_fmr_pool *fpo)
1400 LASSERT(fpo->fpo_map_count == 0);
1402 #ifdef HAVE_FMR_POOL_API
1403 if (fpo->fpo_is_fmr && fpo->fmr.fpo_fmr_pool) {
1404 ib_destroy_fmr_pool(fpo->fmr.fpo_fmr_pool);
1406 #endif /* HAVE_FMR_POOL_API */
1408 struct kib_fast_reg_descriptor *frd, *tmp;
1411 list_for_each_entry_safe(frd, tmp, &fpo->fast_reg.fpo_pool_list,
1413 list_del(&frd->frd_list);
1414 #ifndef HAVE_IB_MAP_MR_SG
1415 ib_free_fast_reg_page_list(frd->frd_frpl);
1417 ib_dereg_mr(frd->frd_mr);
1418 LIBCFS_FREE(frd, sizeof(*frd));
1421 if (i < fpo->fast_reg.fpo_pool_size)
1422 CERROR("FastReg pool still has %d regions registered\n",
1423 fpo->fast_reg.fpo_pool_size - i);
1427 kiblnd_hdev_decref(fpo->fpo_hdev);
1429 LIBCFS_FREE(fpo, sizeof(*fpo));
1433 kiblnd_destroy_fmr_pool_list(struct list_head *head)
1435 struct kib_fmr_pool *fpo, *tmp;
1437 list_for_each_entry_safe(fpo, tmp, head, fpo_list) {
1438 list_del(&fpo->fpo_list);
1439 kiblnd_destroy_fmr_pool(fpo);
1444 kiblnd_fmr_pool_size(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
1447 int size = tunables->lnd_fmr_pool_size / ncpts;
1449 return max(IBLND_FMR_POOL, size);
1453 kiblnd_fmr_flush_trigger(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
1456 int size = tunables->lnd_fmr_flush_trigger / ncpts;
1458 return max(IBLND_FMR_POOL_FLUSH, size);
1461 #ifdef HAVE_FMR_POOL_API
1462 static int kiblnd_alloc_fmr_pool(struct kib_fmr_poolset *fps,
1463 struct kib_fmr_pool *fpo)
1465 struct ib_fmr_pool_param param = {
1466 .max_pages_per_fmr = LNET_MAX_IOV,
1467 .page_shift = PAGE_SHIFT,
1468 .access = (IB_ACCESS_LOCAL_WRITE |
1469 IB_ACCESS_REMOTE_WRITE),
1470 .pool_size = fps->fps_pool_size,
1471 .dirty_watermark = fps->fps_flush_trigger,
1472 .flush_function = NULL,
1474 .cache = !!fps->fps_cache };
1477 fpo->fmr.fpo_fmr_pool = ib_create_fmr_pool(fpo->fpo_hdev->ibh_pd,
1479 if (IS_ERR(fpo->fmr.fpo_fmr_pool)) {
1480 rc = PTR_ERR(fpo->fmr.fpo_fmr_pool);
1482 CERROR("Failed to create FMR pool: %d\n", rc);
1484 CERROR("FMRs are not supported\n");
1486 fpo->fpo_is_fmr = true;
1490 #endif /* HAVE_FMR_POOL_API */
1492 static int kiblnd_alloc_freg_pool(struct kib_fmr_poolset *fps,
1493 struct kib_fmr_pool *fpo,
1494 enum kib_dev_caps dev_caps)
1496 struct kib_fast_reg_descriptor *frd, *tmp;
1499 #ifdef HAVE_FMR_POOL_API
1500 fpo->fpo_is_fmr = false;
1503 INIT_LIST_HEAD(&fpo->fast_reg.fpo_pool_list);
1504 fpo->fast_reg.fpo_pool_size = 0;
1505 for (i = 0; i < fps->fps_pool_size; i++) {
1506 LIBCFS_CPT_ALLOC(frd, lnet_cpt_table(), fps->fps_cpt,
1509 CERROR("Failed to allocate a new fast_reg descriptor\n");
1515 #ifndef HAVE_IB_MAP_MR_SG
1516 frd->frd_frpl = ib_alloc_fast_reg_page_list(fpo->fpo_hdev->ibh_ibdev,
1518 if (IS_ERR(frd->frd_frpl)) {
1519 rc = PTR_ERR(frd->frd_frpl);
1520 CERROR("Failed to allocate ib_fast_reg_page_list: %d\n",
1522 frd->frd_frpl = NULL;
1527 #ifdef HAVE_IB_ALLOC_FAST_REG_MR
1528 frd->frd_mr = ib_alloc_fast_reg_mr(fpo->fpo_hdev->ibh_pd,
1532 * it is expected to get here if this is an MLX-5 card.
1533 * MLX-4 cards will always use FMR and MLX-5 cards will
1534 * always use fast_reg. It turns out that some MLX-5 cards
1535 * (possibly due to older FW versions) do not natively support
1536 * gaps. So we will need to track them here.
1538 frd->frd_mr = ib_alloc_mr(fpo->fpo_hdev->ibh_pd,
1539 #ifdef IB_MR_TYPE_SG_GAPS
1540 ((*kiblnd_tunables.kib_use_fastreg_gaps == 1) &&
1541 (dev_caps & IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT)) ?
1542 IB_MR_TYPE_SG_GAPS :
1548 if ((*kiblnd_tunables.kib_use_fastreg_gaps == 1) &&
1549 (dev_caps & IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT))
1550 CWARN("using IB_MR_TYPE_SG_GAPS, expect a performance drop\n");
1552 if (IS_ERR(frd->frd_mr)) {
1553 rc = PTR_ERR(frd->frd_mr);
1554 CERROR("Failed to allocate ib_fast_reg_mr: %d\n", rc);
1559 /* There appears to be a bug in MLX5 code where you must
1560 * invalidate the rkey of a new FastReg pool before first
1561 * using it. Thus, I am marking the FRD invalid here. */
1562 frd->frd_valid = false;
1564 list_add_tail(&frd->frd_list, &fpo->fast_reg.fpo_pool_list);
1565 fpo->fast_reg.fpo_pool_size++;
1572 ib_dereg_mr(frd->frd_mr);
1573 #ifndef HAVE_IB_MAP_MR_SG
1575 ib_free_fast_reg_page_list(frd->frd_frpl);
1577 LIBCFS_FREE(frd, sizeof(*frd));
1580 list_for_each_entry_safe(frd, tmp, &fpo->fast_reg.fpo_pool_list,
1582 list_del(&frd->frd_list);
1583 #ifndef HAVE_IB_MAP_MR_SG
1584 ib_free_fast_reg_page_list(frd->frd_frpl);
1586 ib_dereg_mr(frd->frd_mr);
1587 LIBCFS_FREE(frd, sizeof(*frd));
1593 static int kiblnd_create_fmr_pool(struct kib_fmr_poolset *fps,
1594 struct kib_fmr_pool **pp_fpo)
1596 struct kib_dev *dev = fps->fps_net->ibn_dev;
1597 struct kib_fmr_pool *fpo;
1600 LIBCFS_CPT_ALLOC(fpo, lnet_cpt_table(), fps->fps_cpt, sizeof(*fpo));
1604 memset(fpo, 0, sizeof(*fpo));
1606 fpo->fpo_hdev = kiblnd_current_hdev(dev);
1608 #ifdef HAVE_FMR_POOL_API
1609 if (dev->ibd_dev_caps & IBLND_DEV_CAPS_FMR_ENABLED)
1610 rc = kiblnd_alloc_fmr_pool(fps, fpo);
1612 #endif /* HAVE_FMR_POOL_API */
1613 rc = kiblnd_alloc_freg_pool(fps, fpo, dev->ibd_dev_caps);
1617 fpo->fpo_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
1618 fpo->fpo_owner = fps;
1624 kiblnd_hdev_decref(fpo->fpo_hdev);
1625 LIBCFS_FREE(fpo, sizeof(*fpo));
1630 kiblnd_fail_fmr_poolset(struct kib_fmr_poolset *fps, struct list_head *zombies)
1632 struct kib_fmr_pool *fpo;
1634 if (fps->fps_net == NULL) /* intialized? */
1637 spin_lock(&fps->fps_lock);
1639 while ((fpo = list_first_entry_or_null(&fps->fps_pool_list,
1640 struct kib_fmr_pool,
1641 fpo_list)) != NULL) {
1642 fpo->fpo_failed = 1;
1643 if (fpo->fpo_map_count == 0)
1644 list_move(&fpo->fpo_list, zombies);
1646 list_move(&fpo->fpo_list, &fps->fps_failed_pool_list);
1649 spin_unlock(&fps->fps_lock);
1653 kiblnd_fini_fmr_poolset(struct kib_fmr_poolset *fps)
1655 if (fps->fps_net != NULL) { /* initialized? */
1656 kiblnd_destroy_fmr_pool_list(&fps->fps_failed_pool_list);
1657 kiblnd_destroy_fmr_pool_list(&fps->fps_pool_list);
1662 kiblnd_init_fmr_poolset(struct kib_fmr_poolset *fps, int cpt, int ncpts,
1663 struct kib_net *net,
1664 struct lnet_ioctl_config_o2iblnd_tunables *tunables)
1666 struct kib_fmr_pool *fpo;
1669 memset(fps, 0, sizeof(struct kib_fmr_poolset));
1674 fps->fps_pool_size = kiblnd_fmr_pool_size(tunables, ncpts);
1675 fps->fps_flush_trigger = kiblnd_fmr_flush_trigger(tunables, ncpts);
1676 fps->fps_cache = tunables->lnd_fmr_cache;
1678 spin_lock_init(&fps->fps_lock);
1679 INIT_LIST_HEAD(&fps->fps_pool_list);
1680 INIT_LIST_HEAD(&fps->fps_failed_pool_list);
1682 rc = kiblnd_create_fmr_pool(fps, &fpo);
1684 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1690 kiblnd_fmr_pool_is_idle(struct kib_fmr_pool *fpo, time64_t now)
1692 if (fpo->fpo_map_count != 0) /* still in use */
1694 if (fpo->fpo_failed)
1696 return now >= fpo->fpo_deadline;
1699 #if defined(HAVE_FMR_POOL_API) || !defined(HAVE_IB_MAP_MR_SG)
1701 kiblnd_map_tx_pages(struct kib_tx *tx, struct kib_rdma_desc *rd)
1703 struct kib_hca_dev *hdev;
1704 __u64 *pages = tx->tx_pages;
1709 hdev = tx->tx_pool->tpo_hdev;
1711 for (i = 0, npages = 0; i < rd->rd_nfrags; i++) {
1712 for (size = 0; size < rd->rd_frags[i].rf_nob;
1713 size += hdev->ibh_page_size) {
1714 pages[npages++] = (rd->rd_frags[i].rf_addr &
1715 hdev->ibh_page_mask) + size;
1724 kiblnd_fmr_pool_unmap(struct kib_fmr *fmr, int status)
1727 struct kib_fmr_pool *fpo = fmr->fmr_pool;
1728 struct kib_fmr_poolset *fps;
1729 time64_t now = ktime_get_seconds();
1730 struct kib_fmr_pool *tmp;
1735 fps = fpo->fpo_owner;
1737 #ifdef HAVE_FMR_POOL_API
1738 if (fpo->fpo_is_fmr) {
1739 if (fmr->fmr_pfmr) {
1740 ib_fmr_pool_unmap(fmr->fmr_pfmr);
1741 fmr->fmr_pfmr = NULL;
1745 int rc = ib_flush_fmr_pool(fpo->fmr.fpo_fmr_pool);
1749 #endif /* HAVE_FMR_POOL_API */
1751 struct kib_fast_reg_descriptor *frd = fmr->fmr_frd;
1754 frd->frd_valid = false;
1755 spin_lock(&fps->fps_lock);
1756 list_add_tail(&frd->frd_list, &fpo->fast_reg.fpo_pool_list);
1757 spin_unlock(&fps->fps_lock);
1758 fmr->fmr_frd = NULL;
1761 fmr->fmr_pool = NULL;
1763 spin_lock(&fps->fps_lock);
1764 fpo->fpo_map_count--; /* decref the pool */
1766 list_for_each_entry_safe(fpo, tmp, &fps->fps_pool_list, fpo_list) {
1767 /* the first pool is persistent */
1768 if (fps->fps_pool_list.next == &fpo->fpo_list)
1771 if (kiblnd_fmr_pool_is_idle(fpo, now)) {
1772 list_move(&fpo->fpo_list, &zombies);
1776 spin_unlock(&fps->fps_lock);
1778 if (!list_empty(&zombies))
1779 kiblnd_destroy_fmr_pool_list(&zombies);
1782 int kiblnd_fmr_pool_map(struct kib_fmr_poolset *fps, struct kib_tx *tx,
1783 struct kib_rdma_desc *rd, u32 nob, u64 iov,
1784 struct kib_fmr *fmr)
1786 struct kib_fmr_pool *fpo;
1788 bool is_rx = (rd != tx->tx_rd);
1789 #ifdef HAVE_FMR_POOL_API
1790 __u64 *pages = tx->tx_pages;
1791 bool tx_pages_mapped = false;
1797 spin_lock(&fps->fps_lock);
1798 version = fps->fps_version;
1799 list_for_each_entry(fpo, &fps->fps_pool_list, fpo_list) {
1800 fpo->fpo_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
1801 fpo->fpo_map_count++;
1803 #ifdef HAVE_FMR_POOL_API
1804 fmr->fmr_pfmr = NULL;
1805 if (fpo->fpo_is_fmr) {
1806 struct ib_pool_fmr *pfmr;
1808 spin_unlock(&fps->fps_lock);
1810 if (!tx_pages_mapped) {
1811 npages = kiblnd_map_tx_pages(tx, rd);
1812 tx_pages_mapped = true;
1815 pfmr = kib_fmr_pool_map(fpo->fmr.fpo_fmr_pool,
1816 pages, npages, iov);
1817 if (likely(!IS_ERR(pfmr))) {
1818 fmr->fmr_key = is_rx ? pfmr->fmr->rkey
1820 fmr->fmr_frd = NULL;
1821 fmr->fmr_pfmr = pfmr;
1822 fmr->fmr_pool = fpo;
1827 #endif /* HAVE_FMR_POOL_API */
1829 if (!list_empty(&fpo->fast_reg.fpo_pool_list)) {
1830 struct kib_fast_reg_descriptor *frd;
1831 #ifdef HAVE_IB_MAP_MR_SG
1832 struct ib_reg_wr *wr;
1835 struct ib_rdma_wr *wr;
1836 struct ib_fast_reg_page_list *frpl;
1840 frd = list_first_entry(
1841 &fpo->fast_reg.fpo_pool_list,
1842 struct kib_fast_reg_descriptor,
1844 list_del(&frd->frd_list);
1845 spin_unlock(&fps->fps_lock);
1847 #ifndef HAVE_IB_MAP_MR_SG
1848 frpl = frd->frd_frpl;
1852 if (!frd->frd_valid) {
1853 struct ib_rdma_wr *inv_wr;
1854 __u32 key = is_rx ? mr->rkey : mr->lkey;
1856 inv_wr = &frd->frd_inv_wr;
1857 memset(inv_wr, 0, sizeof(*inv_wr));
1859 inv_wr->wr.opcode = IB_WR_LOCAL_INV;
1860 inv_wr->wr.wr_id = IBLND_WID_MR;
1861 inv_wr->wr.ex.invalidate_rkey = key;
1864 key = ib_inc_rkey(key);
1865 ib_update_fast_reg_key(mr, key);
1868 #ifdef HAVE_IB_MAP_MR_SG
1869 #ifdef HAVE_IB_MAP_MR_SG_5ARGS
1870 n = ib_map_mr_sg(mr, tx->tx_frags,
1871 rd->rd_nfrags, NULL, PAGE_SIZE);
1873 n = ib_map_mr_sg(mr, tx->tx_frags,
1874 rd->rd_nfrags, PAGE_SIZE);
1875 #endif /* HAVE_IB_MAP_MR_SG_5ARGS */
1876 if (unlikely(n != rd->rd_nfrags)) {
1877 CERROR("Failed to map mr %d/%d elements\n",
1879 return n < 0 ? n : -EINVAL;
1882 wr = &frd->frd_fastreg_wr;
1883 memset(wr, 0, sizeof(*wr));
1885 wr->wr.opcode = IB_WR_REG_MR;
1886 wr->wr.wr_id = IBLND_WID_MR;
1888 wr->wr.send_flags = 0;
1890 wr->key = is_rx ? mr->rkey : mr->lkey;
1891 wr->access = (IB_ACCESS_LOCAL_WRITE |
1892 IB_ACCESS_REMOTE_WRITE);
1893 #else /* HAVE_IB_MAP_MR_SG */
1894 if (!tx_pages_mapped) {
1895 npages = kiblnd_map_tx_pages(tx, rd);
1896 tx_pages_mapped = true;
1899 LASSERT(npages <= frpl->max_page_list_len);
1900 memcpy(frpl->page_list, pages,
1901 sizeof(*pages) * npages);
1903 /* Prepare FastReg WR */
1904 wr = &frd->frd_fastreg_wr;
1905 memset(wr, 0, sizeof(*wr));
1907 wr->wr.opcode = IB_WR_FAST_REG_MR;
1908 wr->wr.wr_id = IBLND_WID_MR;
1910 wr->wr.wr.fast_reg.iova_start = iov;
1911 wr->wr.wr.fast_reg.page_list = frpl;
1912 wr->wr.wr.fast_reg.page_list_len = npages;
1913 wr->wr.wr.fast_reg.page_shift = PAGE_SHIFT;
1914 wr->wr.wr.fast_reg.length = nob;
1915 wr->wr.wr.fast_reg.rkey =
1916 is_rx ? mr->rkey : mr->lkey;
1917 wr->wr.wr.fast_reg.access_flags =
1918 (IB_ACCESS_LOCAL_WRITE |
1919 IB_ACCESS_REMOTE_WRITE);
1920 #endif /* HAVE_IB_MAP_MR_SG */
1922 fmr->fmr_key = is_rx ? mr->rkey : mr->lkey;
1924 fmr->fmr_pool = fpo;
1927 spin_unlock(&fps->fps_lock);
1931 spin_lock(&fps->fps_lock);
1932 fpo->fpo_map_count--;
1933 if (rc != -EAGAIN) {
1934 spin_unlock(&fps->fps_lock);
1938 /* EAGAIN and ... */
1939 if (version != fps->fps_version) {
1940 spin_unlock(&fps->fps_lock);
1945 if (fps->fps_increasing) {
1946 spin_unlock(&fps->fps_lock);
1947 CDEBUG(D_NET, "Another thread is allocating new "
1948 "FMR pool, waiting for her to complete\n");
1949 wait_var_event(fps, !fps->fps_increasing);
1954 if (ktime_get_seconds() < fps->fps_next_retry) {
1955 /* someone failed recently */
1956 spin_unlock(&fps->fps_lock);
1960 fps->fps_increasing = 1;
1961 spin_unlock(&fps->fps_lock);
1963 CDEBUG(D_NET, "Allocate new FMR pool\n");
1964 rc = kiblnd_create_fmr_pool(fps, &fpo);
1965 spin_lock(&fps->fps_lock);
1966 fps->fps_increasing = 0;
1970 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1972 fps->fps_next_retry = ktime_get_seconds() + IBLND_POOL_RETRY;
1974 spin_unlock(&fps->fps_lock);
1980 kiblnd_fini_pool(struct kib_pool *pool)
1982 LASSERT(list_empty(&pool->po_free_list));
1983 LASSERT(pool->po_allocated == 0);
1985 CDEBUG(D_NET, "Finalize %s pool\n", pool->po_owner->ps_name);
1989 kiblnd_init_pool(struct kib_poolset *ps, struct kib_pool *pool, int size)
1991 CDEBUG(D_NET, "Initialize %s pool\n", ps->ps_name);
1993 memset(pool, 0, sizeof(struct kib_pool));
1994 INIT_LIST_HEAD(&pool->po_free_list);
1995 pool->po_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
1996 pool->po_owner = ps;
1997 pool->po_size = size;
2001 kiblnd_destroy_pool_list(struct list_head *head)
2003 struct kib_pool *pool;
2005 while ((pool = list_first_entry_or_null(head,
2007 po_list)) != NULL) {
2008 list_del(&pool->po_list);
2010 LASSERT(pool->po_owner != NULL);
2011 pool->po_owner->ps_pool_destroy(pool);
2016 kiblnd_fail_poolset(struct kib_poolset *ps, struct list_head *zombies)
2018 struct kib_pool *po;
2020 if (ps->ps_net == NULL) /* intialized? */
2023 spin_lock(&ps->ps_lock);
2024 while ((po = list_first_entry_or_null(&ps->ps_pool_list,
2026 po_list)) == NULL) {
2028 if (po->po_allocated == 0)
2029 list_move(&po->po_list, zombies);
2031 list_move(&po->po_list, &ps->ps_failed_pool_list);
2033 spin_unlock(&ps->ps_lock);
2037 kiblnd_fini_poolset(struct kib_poolset *ps)
2039 if (ps->ps_net != NULL) { /* initialized? */
2040 kiblnd_destroy_pool_list(&ps->ps_failed_pool_list);
2041 kiblnd_destroy_pool_list(&ps->ps_pool_list);
2046 kiblnd_init_poolset(struct kib_poolset *ps, int cpt,
2047 struct kib_net *net, char *name, int size,
2048 kib_ps_pool_create_t po_create,
2049 kib_ps_pool_destroy_t po_destroy,
2050 kib_ps_node_init_t nd_init,
2051 kib_ps_node_fini_t nd_fini)
2053 struct kib_pool *pool;
2056 memset(ps, 0, sizeof(struct kib_poolset));
2060 ps->ps_pool_create = po_create;
2061 ps->ps_pool_destroy = po_destroy;
2062 ps->ps_node_init = nd_init;
2063 ps->ps_node_fini = nd_fini;
2064 ps->ps_pool_size = size;
2065 if (strlcpy(ps->ps_name, name, sizeof(ps->ps_name))
2066 >= sizeof(ps->ps_name))
2068 spin_lock_init(&ps->ps_lock);
2069 INIT_LIST_HEAD(&ps->ps_pool_list);
2070 INIT_LIST_HEAD(&ps->ps_failed_pool_list);
2072 rc = ps->ps_pool_create(ps, size, &pool);
2074 list_add(&pool->po_list, &ps->ps_pool_list);
2076 CERROR("Failed to create the first pool for %s\n", ps->ps_name);
2082 kiblnd_pool_is_idle(struct kib_pool *pool, time64_t now)
2084 if (pool->po_allocated != 0) /* still in use */
2086 if (pool->po_failed)
2088 return now >= pool->po_deadline;
2092 kiblnd_pool_free_node(struct kib_pool *pool, struct list_head *node)
2095 struct kib_poolset *ps = pool->po_owner;
2096 struct kib_pool *tmp;
2097 time64_t now = ktime_get_seconds();
2099 spin_lock(&ps->ps_lock);
2101 if (ps->ps_node_fini != NULL)
2102 ps->ps_node_fini(pool, node);
2104 LASSERT(pool->po_allocated > 0);
2105 list_add(node, &pool->po_free_list);
2106 pool->po_allocated--;
2108 list_for_each_entry_safe(pool, tmp, &ps->ps_pool_list, po_list) {
2109 /* the first pool is persistent */
2110 if (ps->ps_pool_list.next == &pool->po_list)
2113 if (kiblnd_pool_is_idle(pool, now))
2114 list_move(&pool->po_list, &zombies);
2116 spin_unlock(&ps->ps_lock);
2118 if (!list_empty(&zombies))
2119 kiblnd_destroy_pool_list(&zombies);
2123 kiblnd_pool_alloc_node(struct kib_poolset *ps)
2125 struct list_head *node;
2126 struct kib_pool *pool;
2128 unsigned int interval = 1;
2129 ktime_t time_before;
2130 unsigned int trips = 0;
2133 spin_lock(&ps->ps_lock);
2134 list_for_each_entry(pool, &ps->ps_pool_list, po_list) {
2135 if (list_empty(&pool->po_free_list))
2138 pool->po_allocated++;
2139 pool->po_deadline = ktime_get_seconds() +
2140 IBLND_POOL_DEADLINE;
2141 node = pool->po_free_list.next;
2144 if (ps->ps_node_init != NULL) {
2145 /* still hold the lock */
2146 ps->ps_node_init(pool, node);
2148 spin_unlock(&ps->ps_lock);
2152 /* no available tx pool and ... */
2153 if (ps->ps_increasing) {
2154 /* another thread is allocating a new pool */
2155 spin_unlock(&ps->ps_lock);
2158 "Another thread is allocating new %s pool, waiting %d jiffies for her to complete. trips = %d\n",
2159 ps->ps_name, interval, trips);
2161 schedule_timeout_interruptible(interval);
2162 if (interval < cfs_time_seconds(1))
2168 if (ktime_get_seconds() < ps->ps_next_retry) {
2169 /* someone failed recently */
2170 spin_unlock(&ps->ps_lock);
2174 ps->ps_increasing = 1;
2175 spin_unlock(&ps->ps_lock);
2177 CDEBUG(D_NET, "%s pool exhausted, allocate new pool\n", ps->ps_name);
2178 time_before = ktime_get();
2179 rc = ps->ps_pool_create(ps, ps->ps_pool_size, &pool);
2180 CDEBUG(D_NET, "ps_pool_create took %lld ms to complete",
2181 ktime_ms_delta(ktime_get(), time_before));
2183 spin_lock(&ps->ps_lock);
2184 ps->ps_increasing = 0;
2186 list_add_tail(&pool->po_list, &ps->ps_pool_list);
2188 ps->ps_next_retry = ktime_get_seconds() + IBLND_POOL_RETRY;
2189 CERROR("Can't allocate new %s pool because out of memory\n",
2192 spin_unlock(&ps->ps_lock);
2198 kiblnd_destroy_tx_pool(struct kib_pool *pool)
2200 struct kib_tx_pool *tpo = container_of(pool, struct kib_tx_pool,
2204 LASSERT (pool->po_allocated == 0);
2206 if (tpo->tpo_tx_pages != NULL) {
2207 kiblnd_unmap_tx_pool(tpo);
2208 kiblnd_free_pages(tpo->tpo_tx_pages);
2211 if (tpo->tpo_tx_descs == NULL)
2214 for (i = 0; i < pool->po_size; i++) {
2215 struct kib_tx *tx = &tpo->tpo_tx_descs[i];
2216 int wrq_sge = *kiblnd_tunables.kib_wrq_sge;
2218 list_del(&tx->tx_list);
2219 if (tx->tx_pages != NULL)
2220 CFS_FREE_PTR_ARRAY(tx->tx_pages, LNET_MAX_IOV);
2221 if (tx->tx_frags != NULL)
2222 CFS_FREE_PTR_ARRAY(tx->tx_frags,
2223 (1 + IBLND_MAX_RDMA_FRAGS));
2224 if (tx->tx_wrq != NULL)
2225 CFS_FREE_PTR_ARRAY(tx->tx_wrq,
2226 (1 + IBLND_MAX_RDMA_FRAGS));
2227 if (tx->tx_sge != NULL)
2228 CFS_FREE_PTR_ARRAY(tx->tx_sge,
2229 (1 + IBLND_MAX_RDMA_FRAGS) *
2231 if (tx->tx_rd != NULL)
2232 LIBCFS_FREE(tx->tx_rd,
2233 offsetof(struct kib_rdma_desc,
2234 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2237 CFS_FREE_PTR_ARRAY(tpo->tpo_tx_descs, pool->po_size);
2239 kiblnd_fini_pool(pool);
2243 static int kiblnd_tx_pool_size(struct lnet_ni *ni, int ncpts)
2245 struct lnet_ioctl_config_o2iblnd_tunables *tunables;
2248 tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib;
2249 ntx = tunables->lnd_ntx / ncpts;
2251 return max(IBLND_TX_POOL, ntx);
2255 kiblnd_create_tx_pool(struct kib_poolset *ps, int size, struct kib_pool **pp_po)
2259 struct kib_pool *pool;
2260 struct kib_tx_pool *tpo;
2262 LIBCFS_CPT_ALLOC(tpo, lnet_cpt_table(), ps->ps_cpt, sizeof(*tpo));
2264 CERROR("Failed to allocate TX pool\n");
2268 pool = &tpo->tpo_pool;
2269 kiblnd_init_pool(ps, pool, size);
2270 tpo->tpo_tx_descs = NULL;
2271 tpo->tpo_tx_pages = NULL;
2273 npg = (size * IBLND_MSG_SIZE + PAGE_SIZE - 1) / PAGE_SIZE;
2274 if (kiblnd_alloc_pages(&tpo->tpo_tx_pages, ps->ps_cpt, npg) != 0) {
2275 CERROR("Can't allocate tx pages: %d\n", npg);
2280 LIBCFS_CPT_ALLOC(tpo->tpo_tx_descs, lnet_cpt_table(), ps->ps_cpt,
2281 size * sizeof(struct kib_tx));
2282 if (tpo->tpo_tx_descs == NULL) {
2283 CERROR("Can't allocate %d tx descriptors\n", size);
2284 ps->ps_pool_destroy(pool);
2288 memset(tpo->tpo_tx_descs, 0, size * sizeof(struct kib_tx));
2290 for (i = 0; i < size; i++) {
2291 struct kib_tx *tx = &tpo->tpo_tx_descs[i];
2292 int wrq_sge = *kiblnd_tunables.kib_wrq_sge;
2295 if (ps->ps_net->ibn_fmr_ps != NULL) {
2296 LIBCFS_CPT_ALLOC(tx->tx_pages,
2297 lnet_cpt_table(), ps->ps_cpt,
2298 LNET_MAX_IOV * sizeof(*tx->tx_pages));
2299 if (tx->tx_pages == NULL)
2303 LIBCFS_CPT_ALLOC(tx->tx_frags, lnet_cpt_table(), ps->ps_cpt,
2304 (1 + IBLND_MAX_RDMA_FRAGS) *
2305 sizeof(*tx->tx_frags));
2306 if (tx->tx_frags == NULL)
2309 sg_init_table(tx->tx_frags, IBLND_MAX_RDMA_FRAGS + 1);
2311 LIBCFS_CPT_ALLOC(tx->tx_wrq, lnet_cpt_table(), ps->ps_cpt,
2312 (1 + IBLND_MAX_RDMA_FRAGS) *
2313 sizeof(*tx->tx_wrq));
2314 if (tx->tx_wrq == NULL)
2317 LIBCFS_CPT_ALLOC(tx->tx_sge, lnet_cpt_table(), ps->ps_cpt,
2318 (1 + IBLND_MAX_RDMA_FRAGS) * wrq_sge *
2319 sizeof(*tx->tx_sge));
2320 if (tx->tx_sge == NULL)
2323 LIBCFS_CPT_ALLOC(tx->tx_rd, lnet_cpt_table(), ps->ps_cpt,
2324 offsetof(struct kib_rdma_desc,
2325 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2326 if (tx->tx_rd == NULL)
2331 kiblnd_map_tx_pool(tpo);
2336 ps->ps_pool_destroy(pool);
2341 kiblnd_tx_init(struct kib_pool *pool, struct list_head *node)
2343 struct kib_tx_poolset *tps = container_of(pool->po_owner,
2344 struct kib_tx_poolset,
2346 struct kib_tx *tx = list_entry(node, struct kib_tx, tx_list);
2348 tx->tx_cookie = tps->tps_next_tx_cookie++;
2352 kiblnd_net_fini_pools(struct kib_net *net)
2356 cfs_cpt_for_each(i, lnet_cpt_table()) {
2357 struct kib_tx_poolset *tps;
2358 struct kib_fmr_poolset *fps;
2360 if (net->ibn_tx_ps != NULL) {
2361 tps = net->ibn_tx_ps[i];
2362 kiblnd_fini_poolset(&tps->tps_poolset);
2365 if (net->ibn_fmr_ps != NULL) {
2366 fps = net->ibn_fmr_ps[i];
2367 kiblnd_fini_fmr_poolset(fps);
2371 if (net->ibn_tx_ps != NULL) {
2372 cfs_percpt_free(net->ibn_tx_ps);
2373 net->ibn_tx_ps = NULL;
2376 if (net->ibn_fmr_ps != NULL) {
2377 cfs_percpt_free(net->ibn_fmr_ps);
2378 net->ibn_fmr_ps = NULL;
2383 kiblnd_net_init_pools(struct kib_net *net, struct lnet_ni *ni, __u32 *cpts,
2386 struct lnet_ioctl_config_o2iblnd_tunables *tunables;
2387 #ifdef HAVE_IB_GET_DMA_MR
2388 unsigned long flags;
2394 tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib;
2396 #ifdef HAVE_IB_GET_DMA_MR
2397 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2399 * if lnd_map_on_demand is zero then we have effectively disabled
2400 * FMR or FastReg and we're using global memory regions
2403 if (!tunables->lnd_map_on_demand) {
2404 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
2406 goto create_tx_pool;
2409 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2412 if (tunables->lnd_fmr_pool_size < tunables->lnd_ntx / 4) {
2413 CERROR("Can't set fmr pool size (%d) < ntx / 4(%d)\n",
2414 tunables->lnd_fmr_pool_size,
2415 tunables->lnd_ntx / 4);
2420 /* TX pool must be created later than FMR, see LU-2268
2422 LASSERT(net->ibn_tx_ps == NULL);
2424 /* premapping can fail if ibd_nmr > 1, so we always create
2425 * FMR pool and map-on-demand if premapping failed */
2427 net->ibn_fmr_ps = cfs_percpt_alloc(lnet_cpt_table(),
2428 sizeof(struct kib_fmr_poolset));
2429 if (net->ibn_fmr_ps == NULL) {
2430 CERROR("Failed to allocate FMR pool array\n");
2435 for (i = 0; i < ncpts; i++) {
2436 cpt = (cpts == NULL) ? i : cpts[i];
2437 rc = kiblnd_init_fmr_poolset(net->ibn_fmr_ps[cpt], cpt, ncpts,
2440 CERROR("Can't initialize FMR pool for CPT %d: %d\n",
2447 LASSERT(i == ncpts);
2449 #ifdef HAVE_IB_GET_DMA_MR
2452 net->ibn_tx_ps = cfs_percpt_alloc(lnet_cpt_table(),
2453 sizeof(struct kib_tx_poolset));
2454 if (net->ibn_tx_ps == NULL) {
2455 CERROR("Failed to allocate tx pool array\n");
2460 for (i = 0; i < ncpts; i++) {
2461 cpt = (cpts == NULL) ? i : cpts[i];
2462 rc = kiblnd_init_poolset(&net->ibn_tx_ps[cpt]->tps_poolset,
2464 kiblnd_tx_pool_size(ni, ncpts),
2465 kiblnd_create_tx_pool,
2466 kiblnd_destroy_tx_pool,
2467 kiblnd_tx_init, NULL);
2469 CERROR("Can't initialize TX pool for CPT %d: %d\n",
2477 kiblnd_net_fini_pools(net);
2483 kiblnd_port_get_attr(struct kib_hca_dev *hdev)
2485 struct ib_port_attr *port_attr;
2487 unsigned long flags;
2488 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2490 LIBCFS_ALLOC(port_attr, sizeof(*port_attr));
2491 if (port_attr == NULL) {
2492 CDEBUG(D_NETERROR, "Out of memory\n");
2496 rc = ib_query_port(hdev->ibh_ibdev, hdev->ibh_port, port_attr);
2498 write_lock_irqsave(g_lock, flags);
2501 hdev->ibh_state = port_attr->state == IB_PORT_ACTIVE
2502 ? IBLND_DEV_PORT_ACTIVE
2503 : IBLND_DEV_PORT_DOWN;
2505 write_unlock_irqrestore(g_lock, flags);
2506 LIBCFS_FREE(port_attr, sizeof(*port_attr));
2509 CDEBUG(D_NETERROR, "Failed to query IB port: %d\n", rc);
2516 kiblnd_set_ni_fatal_on(struct kib_hca_dev *hdev, int val)
2518 struct kib_net *net;
2520 /* for health check */
2521 list_for_each_entry(net, &hdev->ibh_dev->ibd_nets, ibn_list) {
2523 CDEBUG(D_NETERROR, "Fatal device error for NI %s\n",
2524 libcfs_nid2str(net->ibn_ni->ni_nid));
2525 atomic_set(&net->ibn_ni->ni_fatal_error_on, val);
2530 kiblnd_event_handler(struct ib_event_handler *handler, struct ib_event *event)
2532 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2533 struct kib_hca_dev *hdev;
2534 unsigned long flags;
2536 hdev = container_of(handler, struct kib_hca_dev, ibh_event_handler);
2538 write_lock_irqsave(g_lock, flags);
2540 switch (event->event) {
2541 case IB_EVENT_DEVICE_FATAL:
2542 CDEBUG(D_NET, "IB device fatal\n");
2543 hdev->ibh_state = IBLND_DEV_FATAL;
2544 kiblnd_set_ni_fatal_on(hdev, 1);
2546 case IB_EVENT_PORT_ACTIVE:
2547 CDEBUG(D_NET, "IB port active\n");
2548 if (event->element.port_num == hdev->ibh_port) {
2549 hdev->ibh_state = IBLND_DEV_PORT_ACTIVE;
2550 kiblnd_set_ni_fatal_on(hdev, 0);
2553 case IB_EVENT_PORT_ERR:
2554 CDEBUG(D_NET, "IB port err\n");
2555 if (event->element.port_num == hdev->ibh_port) {
2556 hdev->ibh_state = IBLND_DEV_PORT_DOWN;
2557 kiblnd_set_ni_fatal_on(hdev, 1);
2563 write_unlock_irqrestore(g_lock, flags);
2567 kiblnd_hdev_get_attr(struct kib_hca_dev *hdev)
2569 struct ib_device_attr *dev_attr;
2573 /* It's safe to assume a HCA can handle a page size
2574 * matching that of the native system */
2575 hdev->ibh_page_shift = PAGE_SHIFT;
2576 hdev->ibh_page_size = 1 << PAGE_SHIFT;
2577 hdev->ibh_page_mask = ~((__u64)hdev->ibh_page_size - 1);
2579 #ifndef HAVE_IB_DEVICE_ATTRS
2580 LIBCFS_ALLOC(dev_attr, sizeof(*dev_attr));
2581 if (dev_attr == NULL) {
2582 CERROR("Out of memory\n");
2586 rc = ib_query_device(hdev->ibh_ibdev, dev_attr);
2588 CERROR("Failed to query IB device: %d\n", rc);
2589 goto out_clean_attr;
2592 dev_attr = &hdev->ibh_ibdev->attrs;
2595 hdev->ibh_mr_size = dev_attr->max_mr_size;
2596 hdev->ibh_max_qp_wr = dev_attr->max_qp_wr;
2598 /* Setup device Memory Registration capabilities */
2599 #ifdef HAVE_FMR_POOL_API
2600 #ifdef HAVE_IB_DEVICE_OPS
2601 if (hdev->ibh_ibdev->ops.alloc_fmr &&
2602 hdev->ibh_ibdev->ops.dealloc_fmr &&
2603 hdev->ibh_ibdev->ops.map_phys_fmr &&
2604 hdev->ibh_ibdev->ops.unmap_fmr) {
2606 if (hdev->ibh_ibdev->alloc_fmr &&
2607 hdev->ibh_ibdev->dealloc_fmr &&
2608 hdev->ibh_ibdev->map_phys_fmr &&
2609 hdev->ibh_ibdev->unmap_fmr) {
2611 LCONSOLE_INFO("Using FMR for registration\n");
2612 hdev->ibh_dev->ibd_dev_caps |= IBLND_DEV_CAPS_FMR_ENABLED;
2614 #endif /* HAVE_FMR_POOL_API */
2615 if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) {
2616 LCONSOLE_INFO("Using FastReg for registration\n");
2617 hdev->ibh_dev->ibd_dev_caps |= IBLND_DEV_CAPS_FASTREG_ENABLED;
2618 #ifndef HAVE_IB_ALLOC_FAST_REG_MR
2619 #ifdef IB_DEVICE_SG_GAPS_REG
2620 if (dev_attr->device_cap_flags & IB_DEVICE_SG_GAPS_REG)
2621 hdev->ibh_dev->ibd_dev_caps |= IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT;
2628 rc2 = kiblnd_port_get_attr(hdev);
2635 #ifndef HAVE_IB_DEVICE_ATTRS
2637 LIBCFS_FREE(dev_attr, sizeof(*dev_attr));
2641 CERROR("IB device does not support FMRs nor FastRegs, can't "
2642 "register memory: %d\n", rc);
2643 else if (rc == -EINVAL)
2644 CERROR("Invalid mr size: %#llx\n", hdev->ibh_mr_size);
2648 #ifdef HAVE_IB_GET_DMA_MR
2650 kiblnd_hdev_cleanup_mrs(struct kib_hca_dev *hdev)
2652 if (hdev->ibh_mrs == NULL)
2655 ib_dereg_mr(hdev->ibh_mrs);
2657 hdev->ibh_mrs = NULL;
2662 kiblnd_hdev_destroy(struct kib_hca_dev *hdev)
2664 if (hdev->ibh_event_handler.device != NULL)
2665 ib_unregister_event_handler(&hdev->ibh_event_handler);
2667 #ifdef HAVE_IB_GET_DMA_MR
2668 kiblnd_hdev_cleanup_mrs(hdev);
2671 if (hdev->ibh_pd != NULL)
2672 ib_dealloc_pd(hdev->ibh_pd);
2674 if (hdev->ibh_cmid != NULL)
2675 rdma_destroy_id(hdev->ibh_cmid);
2677 LIBCFS_FREE(hdev, sizeof(*hdev));
2680 #ifdef HAVE_IB_GET_DMA_MR
2682 kiblnd_hdev_setup_mrs(struct kib_hca_dev *hdev)
2685 int acflags = IB_ACCESS_LOCAL_WRITE |
2686 IB_ACCESS_REMOTE_WRITE;
2688 mr = ib_get_dma_mr(hdev->ibh_pd, acflags);
2690 CERROR("Failed ib_get_dma_mr: %ld\n", PTR_ERR(mr));
2691 kiblnd_hdev_cleanup_mrs(hdev);
2702 kiblnd_dummy_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event)
2708 kiblnd_dev_need_failover(struct kib_dev *dev, struct net *ns)
2710 struct rdma_cm_id *cmid;
2711 struct sockaddr_in srcaddr;
2712 struct sockaddr_in dstaddr;
2715 if (dev->ibd_hdev == NULL || /* initializing */
2716 dev->ibd_hdev->ibh_cmid == NULL || /* listener is dead */
2717 *kiblnd_tunables.kib_dev_failover > 1) /* debugging */
2720 /* XXX: it's UGLY, but I don't have better way to find
2721 * ib-bonding HCA failover because:
2723 * a. no reliable CM event for HCA failover...
2724 * b. no OFED API to get ib_device for current net_device...
2726 * We have only two choices at this point:
2728 * a. rdma_bind_addr(), it will conflict with listener cmid
2729 * b. rdma_resolve_addr() to zero addr */
2730 cmid = kiblnd_rdma_create_id(ns, kiblnd_dummy_callback, dev,
2731 RDMA_PS_TCP, IB_QPT_RC);
2734 CERROR("Failed to create cmid for failover: %d\n", rc);
2738 memset(&srcaddr, 0, sizeof(srcaddr));
2739 srcaddr.sin_family = AF_INET;
2740 srcaddr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2742 memset(&dstaddr, 0, sizeof(dstaddr));
2743 dstaddr.sin_family = AF_INET;
2744 rc = rdma_resolve_addr(cmid, (struct sockaddr *)&srcaddr,
2745 (struct sockaddr *)&dstaddr, 1);
2746 if (rc != 0 || cmid->device == NULL) {
2747 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2748 dev->ibd_ifname, &dev->ibd_ifip,
2750 rdma_destroy_id(cmid);
2754 rc = dev->ibd_hdev->ibh_ibdev != cmid->device; /* true for failover */
2755 rdma_destroy_id(cmid);
2760 kiblnd_dev_failover(struct kib_dev *dev, struct net *ns)
2762 LIST_HEAD(zombie_tpo);
2763 LIST_HEAD(zombie_ppo);
2764 LIST_HEAD(zombie_fpo);
2765 struct rdma_cm_id *cmid = NULL;
2766 struct kib_hca_dev *hdev = NULL;
2767 struct kib_hca_dev *old;
2769 struct kib_net *net;
2770 struct sockaddr_in addr;
2771 unsigned long flags;
2775 LASSERT (*kiblnd_tunables.kib_dev_failover > 1 ||
2776 dev->ibd_can_failover ||
2777 dev->ibd_hdev == NULL);
2779 rc = kiblnd_dev_need_failover(dev, ns);
2783 if (dev->ibd_hdev != NULL &&
2784 dev->ibd_hdev->ibh_cmid != NULL) {
2785 /* XXX it's not good to close old listener at here,
2786 * because we can fail to create new listener.
2787 * But we have to close it now, otherwise rdma_bind_addr
2788 * will return EADDRINUSE... How crap! */
2789 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2791 cmid = dev->ibd_hdev->ibh_cmid;
2792 /* make next schedule of kiblnd_dev_need_failover()
2793 * return 1 for me */
2794 dev->ibd_hdev->ibh_cmid = NULL;
2795 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2797 rdma_destroy_id(cmid);
2800 cmid = kiblnd_rdma_create_id(ns, kiblnd_cm_callback, dev, RDMA_PS_TCP,
2804 CERROR("Failed to create cmid for failover: %d\n", rc);
2808 memset(&addr, 0, sizeof(addr));
2809 addr.sin_family = AF_INET;
2810 addr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2811 addr.sin_port = htons(*kiblnd_tunables.kib_service);
2813 /* Bind to failover device or port */
2814 rc = rdma_bind_addr(cmid, (struct sockaddr *)&addr);
2815 if (rc != 0 || cmid->device == NULL) {
2816 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2817 dev->ibd_ifname, &dev->ibd_ifip,
2819 rdma_destroy_id(cmid);
2823 LIBCFS_ALLOC(hdev, sizeof(*hdev));
2825 CERROR("Failed to allocate kib_hca_dev\n");
2826 rdma_destroy_id(cmid);
2831 atomic_set(&hdev->ibh_ref, 1);
2832 hdev->ibh_dev = dev;
2833 hdev->ibh_cmid = cmid;
2834 hdev->ibh_ibdev = cmid->device;
2835 hdev->ibh_port = cmid->port_num;
2837 #ifdef HAVE_IB_ALLOC_PD_2ARGS
2838 pd = ib_alloc_pd(cmid->device, 0);
2840 pd = ib_alloc_pd(cmid->device);
2844 CERROR("Can't allocate PD: %d\n", rc);
2850 rc = rdma_listen(cmid, 0);
2852 CERROR("Can't start new listener: %d\n", rc);
2856 rc = kiblnd_hdev_get_attr(hdev);
2858 CERROR("Can't get device attributes: %d\n", rc);
2862 #ifdef HAVE_IB_GET_DMA_MR
2863 rc = kiblnd_hdev_setup_mrs(hdev);
2865 CERROR("Can't setup device: %d\n", rc);
2870 INIT_IB_EVENT_HANDLER(&hdev->ibh_event_handler,
2871 hdev->ibh_ibdev, kiblnd_event_handler);
2872 ib_register_event_handler(&hdev->ibh_event_handler);
2874 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2876 old = dev->ibd_hdev;
2877 dev->ibd_hdev = hdev; /* take over the refcount */
2880 list_for_each_entry(net, &dev->ibd_nets, ibn_list) {
2881 cfs_cpt_for_each(i, lnet_cpt_table()) {
2882 kiblnd_fail_poolset(&net->ibn_tx_ps[i]->tps_poolset,
2885 if (net->ibn_fmr_ps != NULL)
2886 kiblnd_fail_fmr_poolset(net->ibn_fmr_ps[i],
2891 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2893 if (!list_empty(&zombie_tpo))
2894 kiblnd_destroy_pool_list(&zombie_tpo);
2895 if (!list_empty(&zombie_ppo))
2896 kiblnd_destroy_pool_list(&zombie_ppo);
2897 if (!list_empty(&zombie_fpo))
2898 kiblnd_destroy_fmr_pool_list(&zombie_fpo);
2900 kiblnd_hdev_decref(hdev);
2903 dev->ibd_failed_failover++;
2905 dev->ibd_failed_failover = 0;
2911 kiblnd_destroy_dev(struct kib_dev *dev)
2913 LASSERT(dev->ibd_nnets == 0);
2914 LASSERT(list_empty(&dev->ibd_nets));
2916 list_del(&dev->ibd_fail_list);
2917 list_del(&dev->ibd_list);
2919 if (dev->ibd_hdev != NULL)
2920 kiblnd_hdev_decref(dev->ibd_hdev);
2922 LIBCFS_FREE(dev, sizeof(*dev));
2926 kiblnd_base_shutdown(void)
2928 struct kib_sched_info *sched;
2929 struct kib_peer_ni *peer_ni;
2932 LASSERT(list_empty(&kiblnd_data.kib_devs));
2934 CDEBUG(D_MALLOC, "before LND base cleanup: kmem %lld\n",
2935 libcfs_kmem_read());
2937 switch (kiblnd_data.kib_init) {
2941 case IBLND_INIT_ALL:
2942 case IBLND_INIT_DATA:
2943 hash_for_each(kiblnd_data.kib_peers, i, peer_ni, ibp_list)
2945 LASSERT(list_empty(&kiblnd_data.kib_connd_zombies));
2946 LASSERT(list_empty(&kiblnd_data.kib_connd_conns));
2947 LASSERT(list_empty(&kiblnd_data.kib_reconn_list));
2948 LASSERT(list_empty(&kiblnd_data.kib_reconn_wait));
2950 /* flag threads to terminate; wake and wait for them to die */
2951 kiblnd_data.kib_shutdown = 1;
2953 /* NB: we really want to stop scheduler threads net by net
2954 * instead of the whole module, this should be improved
2955 * with dynamic configuration LNet.
2957 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds)
2958 wake_up_all(&sched->ibs_waitq);
2960 wake_up(&kiblnd_data.kib_connd_waitq);
2961 wake_up(&kiblnd_data.kib_failover_waitq);
2963 wait_var_event_warning(&kiblnd_data.kib_nthreads,
2964 !atomic_read(&kiblnd_data.kib_nthreads),
2965 "Waiting for %d threads to terminate\n",
2966 atomic_read(&kiblnd_data.kib_nthreads));
2969 case IBLND_INIT_NOTHING:
2973 if (kiblnd_data.kib_scheds != NULL)
2974 cfs_percpt_free(kiblnd_data.kib_scheds);
2976 CDEBUG(D_MALLOC, "after LND base cleanup: kmem %lld\n",
2977 libcfs_kmem_read());
2979 kiblnd_data.kib_init = IBLND_INIT_NOTHING;
2980 module_put(THIS_MODULE);
2984 kiblnd_shutdown(struct lnet_ni *ni)
2986 struct kib_net *net = ni->ni_data;
2987 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2988 unsigned long flags;
2990 LASSERT(kiblnd_data.kib_init == IBLND_INIT_ALL);
2995 CDEBUG(D_MALLOC, "before LND net cleanup: kmem %lld\n",
2996 libcfs_kmem_read());
2998 write_lock_irqsave(g_lock, flags);
2999 net->ibn_shutdown = 1;
3000 write_unlock_irqrestore(g_lock, flags);
3002 switch (net->ibn_init) {
3006 case IBLND_INIT_ALL:
3007 /* nuke all existing peers within this net */
3008 kiblnd_del_peer(ni, LNET_NID_ANY);
3010 /* Wait for all peer_ni state to clean up */
3011 wait_var_event_warning(&net->ibn_npeers,
3012 atomic_read(&net->ibn_npeers) == 0,
3013 "%s: waiting for %d peers to disconnect\n",
3014 libcfs_nid2str(ni->ni_nid),
3015 atomic_read(&net->ibn_npeers));
3017 kiblnd_net_fini_pools(net);
3019 write_lock_irqsave(g_lock, flags);
3020 LASSERT(net->ibn_dev->ibd_nnets > 0);
3021 net->ibn_dev->ibd_nnets--;
3022 list_del(&net->ibn_list);
3023 write_unlock_irqrestore(g_lock, flags);
3027 case IBLND_INIT_NOTHING:
3028 LASSERT (atomic_read(&net->ibn_nconns) == 0);
3030 if (net->ibn_dev != NULL &&
3031 net->ibn_dev->ibd_nnets == 0)
3032 kiblnd_destroy_dev(net->ibn_dev);
3037 CDEBUG(D_MALLOC, "after LND net cleanup: kmem %lld\n",
3038 libcfs_kmem_read());
3040 net->ibn_init = IBLND_INIT_NOTHING;
3043 LIBCFS_FREE(net, sizeof(*net));
3046 if (list_empty(&kiblnd_data.kib_devs))
3047 kiblnd_base_shutdown();
3051 kiblnd_base_startup(struct net *ns)
3053 struct kib_sched_info *sched;
3057 LASSERT(kiblnd_data.kib_init == IBLND_INIT_NOTHING);
3059 if (!try_module_get(THIS_MODULE))
3062 memset(&kiblnd_data, 0, sizeof(kiblnd_data)); /* zero pointers, flags etc */
3064 rwlock_init(&kiblnd_data.kib_global_lock);
3066 INIT_LIST_HEAD(&kiblnd_data.kib_devs);
3067 INIT_LIST_HEAD(&kiblnd_data.kib_failed_devs);
3069 hash_init(kiblnd_data.kib_peers);
3071 spin_lock_init(&kiblnd_data.kib_connd_lock);
3072 INIT_LIST_HEAD(&kiblnd_data.kib_connd_conns);
3073 INIT_LIST_HEAD(&kiblnd_data.kib_connd_waits);
3074 INIT_LIST_HEAD(&kiblnd_data.kib_connd_zombies);
3075 INIT_LIST_HEAD(&kiblnd_data.kib_reconn_list);
3076 INIT_LIST_HEAD(&kiblnd_data.kib_reconn_wait);
3078 init_waitqueue_head(&kiblnd_data.kib_connd_waitq);
3079 init_waitqueue_head(&kiblnd_data.kib_failover_waitq);
3081 kiblnd_data.kib_scheds = cfs_percpt_alloc(lnet_cpt_table(),
3083 if (kiblnd_data.kib_scheds == NULL)
3086 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
3089 spin_lock_init(&sched->ibs_lock);
3090 INIT_LIST_HEAD(&sched->ibs_conns);
3091 init_waitqueue_head(&sched->ibs_waitq);
3093 nthrs = cfs_cpt_weight(lnet_cpt_table(), i);
3094 if (*kiblnd_tunables.kib_nscheds > 0) {
3095 nthrs = min(nthrs, *kiblnd_tunables.kib_nscheds);
3097 /* max to half of CPUs, another half is reserved for
3098 * upper layer modules */
3099 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
3102 sched->ibs_nthreads_max = nthrs;
3106 kiblnd_data.kib_error_qpa.qp_state = IB_QPS_ERR;
3108 /* lists/ptrs/locks initialised */
3109 kiblnd_data.kib_init = IBLND_INIT_DATA;
3110 /*****************************************************/
3112 rc = kiblnd_thread_start(kiblnd_connd, NULL, "kiblnd_connd");
3114 CERROR("Can't spawn o2iblnd connd: %d\n", rc);
3118 if (*kiblnd_tunables.kib_dev_failover != 0)
3119 rc = kiblnd_thread_start(kiblnd_failover_thread, ns,
3123 CERROR("Can't spawn o2iblnd failover thread: %d\n", rc);
3127 /* flag everything initialised */
3128 kiblnd_data.kib_init = IBLND_INIT_ALL;
3129 /*****************************************************/
3134 kiblnd_base_shutdown();
3139 kiblnd_start_schedulers(struct kib_sched_info *sched)
3145 if (sched->ibs_nthreads == 0) {
3146 if (*kiblnd_tunables.kib_nscheds > 0) {
3147 nthrs = sched->ibs_nthreads_max;
3149 nthrs = cfs_cpt_weight(lnet_cpt_table(),
3151 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
3152 nthrs = min(IBLND_N_SCHED_HIGH, nthrs);
3155 LASSERT(sched->ibs_nthreads <= sched->ibs_nthreads_max);
3156 /* increase one thread if there is new interface */
3157 nthrs = (sched->ibs_nthreads < sched->ibs_nthreads_max);
3160 for (i = 0; i < nthrs; i++) {
3163 id = KIB_THREAD_ID(sched->ibs_cpt, sched->ibs_nthreads + i);
3164 snprintf(name, sizeof(name), "kiblnd_sd_%02ld_%02ld",
3165 KIB_THREAD_CPT(id), KIB_THREAD_TID(id));
3166 rc = kiblnd_thread_start(kiblnd_scheduler, (void *)id, name);
3170 CERROR("Can't spawn thread %d for scheduler[%d]: %d\n",
3171 sched->ibs_cpt, sched->ibs_nthreads + i, rc);
3175 sched->ibs_nthreads += i;
3179 static int kiblnd_dev_start_threads(struct kib_dev *dev, bool newdev, u32 *cpts,
3186 for (i = 0; i < ncpts; i++) {
3187 struct kib_sched_info *sched;
3189 cpt = (cpts == NULL) ? i : cpts[i];
3190 sched = kiblnd_data.kib_scheds[cpt];
3192 if (!newdev && sched->ibs_nthreads > 0)
3195 rc = kiblnd_start_schedulers(kiblnd_data.kib_scheds[cpt]);
3197 CERROR("Failed to start scheduler threads for %s\n",
3205 static struct kib_dev *
3206 kiblnd_dev_search(char *ifname)
3208 struct kib_dev *alias = NULL;
3209 struct kib_dev *dev;
3213 colon = strchr(ifname, ':');
3214 list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) {
3215 if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
3221 colon2 = strchr(dev->ibd_ifname, ':');
3227 if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
3239 kiblnd_startup(struct lnet_ni *ni)
3241 char *ifname = NULL;
3242 struct lnet_inetdev *ifaces = NULL;
3243 struct kib_dev *ibdev = NULL;
3244 struct kib_net *net = NULL;
3245 unsigned long flags;
3250 LASSERT(ni->ni_net->net_lnd == &the_o2iblnd);
3252 if (kiblnd_data.kib_init == IBLND_INIT_NOTHING) {
3253 rc = kiblnd_base_startup(ni->ni_net_ns);
3258 LIBCFS_ALLOC(net, sizeof(*net));
3266 net->ibn_incarnation = ktime_get_real_ns() / NSEC_PER_USEC;
3268 kiblnd_tunables_setup(ni);
3271 * Multi-Rail wants each secondary
3272 * IP to be treated as an unique 'struct ni' interface.
3274 if (ni->ni_interface != NULL) {
3275 /* Use the IPoIB interface specified in 'networks=' */
3276 ifname = ni->ni_interface;
3278 ifname = *kiblnd_tunables.kib_default_ipif;
3281 if (strlen(ifname) >= sizeof(ibdev->ibd_ifname)) {
3282 CERROR("IPoIB interface name too long: %s\n", ifname);
3287 rc = lnet_inet_enumerate(&ifaces, ni->ni_net_ns);
3291 for (i = 0; i < rc; i++) {
3292 if (strcmp(ifname, ifaces[i].li_name) == 0)
3297 CERROR("ko2iblnd: No matching interfaces\n");
3302 ibdev = kiblnd_dev_search(ifname);
3303 newdev = ibdev == NULL;
3304 /* hmm...create kib_dev even for alias */
3305 if (ibdev == NULL || strcmp(&ibdev->ibd_ifname[0], ifname) != 0) {
3306 LIBCFS_ALLOC(ibdev, sizeof(*ibdev));
3312 ibdev->ibd_ifip = ifaces[i].li_ipaddr;
3313 strlcpy(ibdev->ibd_ifname, ifaces[i].li_name,
3314 sizeof(ibdev->ibd_ifname));
3315 ibdev->ibd_can_failover = !!(ifaces[i].li_flags & IFF_MASTER);
3317 INIT_LIST_HEAD(&ibdev->ibd_nets);
3318 INIT_LIST_HEAD(&ibdev->ibd_list); /* not yet in kib_devs */
3319 INIT_LIST_HEAD(&ibdev->ibd_fail_list);
3321 /* initialize the device */
3322 rc = kiblnd_dev_failover(ibdev, ni->ni_net_ns);
3324 CERROR("ko2iblnd: Can't initialize device: rc = %d\n",
3329 list_add_tail(&ibdev->ibd_list, &kiblnd_data.kib_devs);
3332 net->ibn_dev = ibdev;
3333 ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid), ibdev->ibd_ifip);
3335 ni->ni_dev_cpt = ifaces[i].li_cpt;
3337 rc = kiblnd_dev_start_threads(ibdev, newdev, ni->ni_cpts, ni->ni_ncpts);
3341 rc = kiblnd_net_init_pools(net, ni, ni->ni_cpts, ni->ni_ncpts);
3343 CERROR("Failed to initialize NI pools: %d\n", rc);
3347 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
3349 list_add_tail(&net->ibn_list, &ibdev->ibd_nets);
3350 /* for health check */
3351 if (ibdev->ibd_hdev->ibh_state == IBLND_DEV_PORT_DOWN)
3352 kiblnd_set_ni_fatal_on(ibdev->ibd_hdev, 1);
3353 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
3355 net->ibn_init = IBLND_INIT_ALL;
3360 if (net != NULL && net->ibn_dev == NULL && ibdev != NULL)
3361 kiblnd_destroy_dev(ibdev);
3364 kiblnd_shutdown(ni);
3366 CDEBUG(D_NET, "Configuration of device %s failed: rc = %d\n",
3367 ifname ? ifname : "", rc);
3372 static const struct lnet_lnd the_o2iblnd = {
3373 .lnd_type = O2IBLND,
3374 .lnd_startup = kiblnd_startup,
3375 .lnd_shutdown = kiblnd_shutdown,
3376 .lnd_ctl = kiblnd_ctl,
3377 .lnd_send = kiblnd_send,
3378 .lnd_recv = kiblnd_recv,
3381 static void ko2inlnd_assert_wire_constants(void)
3383 BUILD_BUG_ON(IBLND_MSG_MAGIC != 0x0be91b91);
3384 BUILD_BUG_ON(IBLND_MSG_VERSION_1 != 0x11);
3385 BUILD_BUG_ON(IBLND_MSG_VERSION_2 != 0x12);
3386 BUILD_BUG_ON(IBLND_MSG_VERSION != IBLND_MSG_VERSION_2);
3388 BUILD_BUG_ON(IBLND_MSG_CONNREQ != 0xc0);
3389 BUILD_BUG_ON(IBLND_MSG_CONNACK != 0xc1);
3390 BUILD_BUG_ON(IBLND_MSG_NOOP != 0xd0);
3391 BUILD_BUG_ON(IBLND_MSG_IMMEDIATE != 0xd1);
3392 BUILD_BUG_ON(IBLND_MSG_PUT_REQ != 0xd2);
3393 BUILD_BUG_ON(IBLND_MSG_PUT_NAK != 0xd3);
3394 BUILD_BUG_ON(IBLND_MSG_PUT_ACK != 0xd4);
3395 BUILD_BUG_ON(IBLND_MSG_PUT_DONE != 0xd5);
3396 BUILD_BUG_ON(IBLND_MSG_GET_REQ != 0xd6);
3397 BUILD_BUG_ON(IBLND_MSG_GET_DONE != 0xd7);
3399 BUILD_BUG_ON(IBLND_REJECT_CONN_RACE != 1);
3400 BUILD_BUG_ON(IBLND_REJECT_NO_RESOURCES != 2);
3401 BUILD_BUG_ON(IBLND_REJECT_FATAL != 3);
3402 BUILD_BUG_ON(IBLND_REJECT_CONN_UNCOMPAT != 4);
3403 BUILD_BUG_ON(IBLND_REJECT_CONN_STALE != 5);
3404 BUILD_BUG_ON(IBLND_REJECT_RDMA_FRAGS != 6);
3405 BUILD_BUG_ON(IBLND_REJECT_MSG_QUEUE_SIZE != 7);
3406 BUILD_BUG_ON(IBLND_REJECT_INVALID_SRV_ID != 8);
3408 BUILD_BUG_ON((int)sizeof(struct kib_connparams) != 8);
3409 BUILD_BUG_ON((int)offsetof(struct kib_connparams, ibcp_queue_depth) != 0);
3410 BUILD_BUG_ON((int)sizeof(((struct kib_connparams *)0)->ibcp_queue_depth) != 2);
3411 BUILD_BUG_ON((int)offsetof(struct kib_connparams, ibcp_max_frags) != 2);
3412 BUILD_BUG_ON((int)sizeof(((struct kib_connparams *)0)->ibcp_max_frags) != 2);
3413 BUILD_BUG_ON((int)offsetof(struct kib_connparams, ibcp_max_msg_size) != 4);
3414 BUILD_BUG_ON((int)sizeof(((struct kib_connparams *)0)->ibcp_max_msg_size) != 4);
3416 BUILD_BUG_ON((int)sizeof(struct kib_immediate_msg) != 72);
3417 BUILD_BUG_ON((int)offsetof(struct kib_immediate_msg, ibim_hdr) != 0);
3418 BUILD_BUG_ON((int)sizeof(((struct kib_immediate_msg *)0)->ibim_hdr) != 72);
3419 BUILD_BUG_ON((int)offsetof(struct kib_immediate_msg, ibim_payload) != 72);
3420 BUILD_BUG_ON((int)sizeof(((struct kib_immediate_msg *)0)->ibim_payload) != 0);
3422 BUILD_BUG_ON((int)sizeof(struct kib_rdma_frag) != 12);
3423 BUILD_BUG_ON((int)offsetof(struct kib_rdma_frag, rf_nob) != 0);
3424 BUILD_BUG_ON((int)sizeof(((struct kib_rdma_frag *)0)->rf_nob) != 4);
3425 BUILD_BUG_ON((int)offsetof(struct kib_rdma_frag, rf_addr) != 4);
3426 BUILD_BUG_ON((int)sizeof(((struct kib_rdma_frag *)0)->rf_addr) != 8);
3428 BUILD_BUG_ON((int)sizeof(struct kib_rdma_desc) != 8);
3429 BUILD_BUG_ON((int)offsetof(struct kib_rdma_desc, rd_key) != 0);
3430 BUILD_BUG_ON((int)sizeof(((struct kib_rdma_desc *)0)->rd_key) != 4);
3431 BUILD_BUG_ON((int)offsetof(struct kib_rdma_desc, rd_nfrags) != 4);
3432 BUILD_BUG_ON((int)sizeof(((struct kib_rdma_desc *)0)->rd_nfrags) != 4);
3433 BUILD_BUG_ON((int)offsetof(struct kib_rdma_desc, rd_frags) != 8);
3434 BUILD_BUG_ON((int)sizeof(((struct kib_rdma_desc *)0)->rd_frags) != 0);
3436 BUILD_BUG_ON((int)sizeof(struct kib_putreq_msg) != 80);
3437 BUILD_BUG_ON((int)offsetof(struct kib_putreq_msg, ibprm_hdr) != 0);
3438 BUILD_BUG_ON((int)sizeof(((struct kib_putreq_msg *)0)->ibprm_hdr) != 72);
3439 BUILD_BUG_ON((int)offsetof(struct kib_putreq_msg, ibprm_cookie) != 72);
3440 BUILD_BUG_ON((int)sizeof(((struct kib_putreq_msg *)0)->ibprm_cookie) != 8);
3442 BUILD_BUG_ON((int)sizeof(struct kib_putack_msg) != 24);
3443 BUILD_BUG_ON((int)offsetof(struct kib_putack_msg, ibpam_src_cookie) != 0);
3444 BUILD_BUG_ON((int)sizeof(((struct kib_putack_msg *)0)->ibpam_src_cookie) != 8);
3445 BUILD_BUG_ON((int)offsetof(struct kib_putack_msg, ibpam_dst_cookie) != 8);
3446 BUILD_BUG_ON((int)sizeof(((struct kib_putack_msg *)0)->ibpam_dst_cookie) != 8);
3447 BUILD_BUG_ON((int)offsetof(struct kib_putack_msg, ibpam_rd) != 16);
3448 BUILD_BUG_ON((int)sizeof(((struct kib_putack_msg *)0)->ibpam_rd) != 8);
3450 BUILD_BUG_ON((int)sizeof(struct kib_get_msg) != 88);
3451 BUILD_BUG_ON((int)offsetof(struct kib_get_msg, ibgm_hdr) != 0);
3452 BUILD_BUG_ON((int)sizeof(((struct kib_get_msg *)0)->ibgm_hdr) != 72);
3453 BUILD_BUG_ON((int)offsetof(struct kib_get_msg, ibgm_cookie) != 72);
3454 BUILD_BUG_ON((int)sizeof(((struct kib_get_msg *)0)->ibgm_cookie) != 8);
3455 BUILD_BUG_ON((int)offsetof(struct kib_get_msg, ibgm_rd) != 80);
3456 BUILD_BUG_ON((int)sizeof(((struct kib_get_msg *)0)->ibgm_rd) != 8);
3458 BUILD_BUG_ON((int)sizeof(struct kib_completion_msg) != 12);
3459 BUILD_BUG_ON((int)offsetof(struct kib_completion_msg, ibcm_cookie) != 0);
3460 BUILD_BUG_ON((int)sizeof(((struct kib_completion_msg *)0)->ibcm_cookie) != 8);
3461 BUILD_BUG_ON((int)offsetof(struct kib_completion_msg, ibcm_status) != 8);
3462 BUILD_BUG_ON((int)sizeof(((struct kib_completion_msg *)0)->ibcm_status) != 4);
3464 /* Checks for struct kib_msg */
3465 //BUILD_BUG_ON((int)sizeof(struct kib_msg) != 12);
3466 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_magic) != 0);
3467 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_magic) != 4);
3468 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_version) != 4);
3469 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_version) != 2);
3470 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_type) != 6);
3471 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_type) != 1);
3472 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_credits) != 7);
3473 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_credits) != 1);
3474 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_nob) != 8);
3475 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_nob) != 4);
3476 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_cksum) != 12);
3477 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_cksum) != 4);
3478 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_srcnid) != 16);
3479 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_srcnid) != 8);
3480 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_srcstamp) != 24);
3481 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_srcstamp) != 8);
3482 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_dstnid) != 32);
3483 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_dstnid) != 8);
3484 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_dststamp) != 40);
3485 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_dststamp) != 8);
3488 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.connparams.ibcp_queue_depth) != 48);
3489 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.connparams.ibcp_queue_depth) != 2);
3490 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.connparams.ibcp_max_frags) != 50);
3491 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.connparams.ibcp_max_frags) != 2);
3492 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.connparams.ibcp_max_msg_size) != 52);
3493 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.connparams.ibcp_max_msg_size) != 4);
3495 /* Immediate message */
3496 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.immediate.ibim_hdr) != 48);
3497 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.immediate.ibim_hdr) != 72);
3498 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.immediate.ibim_payload) != 120);
3499 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.immediate.ibim_payload) != 0);
3501 /* PUT req message */
3502 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.putreq.ibprm_hdr) != 48);
3503 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.putreq.ibprm_hdr) != 72);
3504 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.putreq.ibprm_cookie) != 120);
3505 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.putreq.ibprm_cookie) != 8);
3508 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.putack.ibpam_src_cookie) != 48);
3509 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.putack.ibpam_src_cookie) != 8);
3510 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.putack.ibpam_dst_cookie) != 56);
3511 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.putack.ibpam_dst_cookie) != 8);
3512 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.putack.ibpam_rd) != 64);
3513 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.putack.ibpam_rd) != 8);
3516 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.get.ibgm_hdr) != 48);
3517 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.get.ibgm_hdr) != 72);
3518 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.get.ibgm_cookie) != 120);
3519 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.get.ibgm_cookie) != 8);
3520 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.get.ibgm_rd) != 128);
3521 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.get.ibgm_rd) != 8);
3523 /* Completion message */
3524 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.completion.ibcm_cookie) != 48);
3525 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.completion.ibcm_cookie) != 8);
3526 BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.completion.ibcm_status) != 56);
3527 BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.completion.ibcm_status) != 4);
3530 BUILD_BUG_ON(sizeof(struct kib_msg) > IBLND_MSG_SIZE);
3531 BUILD_BUG_ON(offsetof(struct kib_msg,
3532 ibm_u.get.ibgm_rd.rd_frags[IBLND_MAX_RDMA_FRAGS]) >
3534 BUILD_BUG_ON(offsetof(struct kib_msg,
3535 ibm_u.putack.ibpam_rd.rd_frags[IBLND_MAX_RDMA_FRAGS]) >
3539 static void __exit ko2iblnd_exit(void)
3541 lnet_unregister_lnd(&the_o2iblnd);
3544 static int __init ko2iblnd_init(void)
3548 ko2inlnd_assert_wire_constants();
3550 rc = kiblnd_tunables_init();
3554 lnet_register_lnd(&the_o2iblnd);
3559 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3560 MODULE_DESCRIPTION("OpenIB gen2 LNet Network Driver");
3561 MODULE_VERSION("2.8.0");
3562 MODULE_LICENSE("GPL");
3564 module_init(ko2iblnd_init);
3565 module_exit(ko2iblnd_exit);