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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2015, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lnet/klnds/o2iblnd/o2iblnd.c
38 * Author: Eric Barton <eric@bartonsoftware.com>
44 static lnd_t the_o2iblnd;
46 kib_data_t kiblnd_data;
49 kiblnd_cksum (void *ptr, int nob)
55 sum = ((sum << 1) | (sum >> 31)) + *c++;
57 /* ensure I don't return 0 (== no checksum) */
58 return (sum == 0) ? 1 : sum;
62 kiblnd_msgtype2str(int type)
65 case IBLND_MSG_CONNREQ:
68 case IBLND_MSG_CONNACK:
74 case IBLND_MSG_IMMEDIATE:
77 case IBLND_MSG_PUT_REQ:
80 case IBLND_MSG_PUT_NAK:
83 case IBLND_MSG_PUT_ACK:
86 case IBLND_MSG_PUT_DONE:
89 case IBLND_MSG_GET_REQ:
92 case IBLND_MSG_GET_DONE:
101 kiblnd_msgtype2size(int type)
103 const int hdr_size = offsetof(kib_msg_t, ibm_u);
106 case IBLND_MSG_CONNREQ:
107 case IBLND_MSG_CONNACK:
108 return hdr_size + sizeof(kib_connparams_t);
113 case IBLND_MSG_IMMEDIATE:
114 return offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[0]);
116 case IBLND_MSG_PUT_REQ:
117 return hdr_size + sizeof(kib_putreq_msg_t);
119 case IBLND_MSG_PUT_ACK:
120 return hdr_size + sizeof(kib_putack_msg_t);
122 case IBLND_MSG_GET_REQ:
123 return hdr_size + sizeof(kib_get_msg_t);
125 case IBLND_MSG_PUT_NAK:
126 case IBLND_MSG_PUT_DONE:
127 case IBLND_MSG_GET_DONE:
128 return hdr_size + sizeof(kib_completion_msg_t);
135 kiblnd_unpack_rd(kib_msg_t *msg, int flip)
143 LASSERT (msg->ibm_type == IBLND_MSG_GET_REQ ||
144 msg->ibm_type == IBLND_MSG_PUT_ACK);
146 rd = msg->ibm_type == IBLND_MSG_GET_REQ ?
147 &msg->ibm_u.get.ibgm_rd :
148 &msg->ibm_u.putack.ibpam_rd;
151 __swab32s(&rd->rd_key);
152 __swab32s(&rd->rd_nfrags);
156 nob = offsetof (kib_msg_t, ibm_u) +
157 kiblnd_rd_msg_size(rd, msg->ibm_type, n);
159 if (msg->ibm_nob < nob) {
160 CERROR("Short %s: %d(%d)\n",
161 kiblnd_msgtype2str(msg->ibm_type), msg->ibm_nob, nob);
165 msg_size = kiblnd_rd_size(rd);
166 if (msg_size <= 0 || msg_size > LNET_MAX_PAYLOAD) {
167 CERROR("Bad msg_size: %d, should be 0 < n <= %d\n",
168 msg_size, LNET_MAX_PAYLOAD);
175 for (i = 0; i < n; i++) {
176 __swab32s(&rd->rd_frags[i].rf_nob);
177 __swab64s(&rd->rd_frags[i].rf_addr);
184 kiblnd_pack_msg (lnet_ni_t *ni, kib_msg_t *msg, int version,
185 int credits, lnet_nid_t dstnid, __u64 dststamp)
187 kib_net_t *net = ni->ni_data;
189 /* CAVEAT EMPTOR! all message fields not set here should have been
190 * initialised previously. */
191 msg->ibm_magic = IBLND_MSG_MAGIC;
192 msg->ibm_version = version;
194 msg->ibm_credits = credits;
197 msg->ibm_srcnid = ni->ni_nid;
198 msg->ibm_srcstamp = net->ibn_incarnation;
199 msg->ibm_dstnid = dstnid;
200 msg->ibm_dststamp = dststamp;
202 if (*kiblnd_tunables.kib_cksum) {
203 /* NB ibm_cksum zero while computing cksum */
204 msg->ibm_cksum = kiblnd_cksum(msg, msg->ibm_nob);
209 kiblnd_unpack_msg(kib_msg_t *msg, int nob)
211 const int hdr_size = offsetof(kib_msg_t, ibm_u);
217 /* 6 bytes are enough to have received magic + version */
219 CERROR("Short message: %d\n", nob);
223 if (msg->ibm_magic == IBLND_MSG_MAGIC) {
225 } else if (msg->ibm_magic == __swab32(IBLND_MSG_MAGIC)) {
228 CERROR("Bad magic: %08x\n", msg->ibm_magic);
232 version = flip ? __swab16(msg->ibm_version) : msg->ibm_version;
233 if (version != IBLND_MSG_VERSION &&
234 version != IBLND_MSG_VERSION_1) {
235 CERROR("Bad version: %x\n", version);
239 if (nob < hdr_size) {
240 CERROR("Short message: %d\n", nob);
244 msg_nob = flip ? __swab32(msg->ibm_nob) : msg->ibm_nob;
246 CERROR("Short message: got %d, wanted %d\n", nob, msg_nob);
250 /* checksum must be computed with ibm_cksum zero and BEFORE anything
252 msg_cksum = flip ? __swab32(msg->ibm_cksum) : msg->ibm_cksum;
254 if (msg_cksum != 0 &&
255 msg_cksum != kiblnd_cksum(msg, msg_nob)) {
256 CERROR("Bad checksum\n");
260 msg->ibm_cksum = msg_cksum;
263 /* leave magic unflipped as a clue to peer endianness */
264 msg->ibm_version = version;
265 CLASSERT (sizeof(msg->ibm_type) == 1);
266 CLASSERT (sizeof(msg->ibm_credits) == 1);
267 msg->ibm_nob = msg_nob;
268 __swab64s(&msg->ibm_srcnid);
269 __swab64s(&msg->ibm_srcstamp);
270 __swab64s(&msg->ibm_dstnid);
271 __swab64s(&msg->ibm_dststamp);
274 if (msg->ibm_srcnid == LNET_NID_ANY) {
275 CERROR("Bad src nid: %s\n", libcfs_nid2str(msg->ibm_srcnid));
279 if (msg_nob < kiblnd_msgtype2size(msg->ibm_type)) {
280 CERROR("Short %s: %d(%d)\n", kiblnd_msgtype2str(msg->ibm_type),
281 msg_nob, kiblnd_msgtype2size(msg->ibm_type));
285 switch (msg->ibm_type) {
287 CERROR("Unknown message type %x\n", msg->ibm_type);
291 case IBLND_MSG_IMMEDIATE:
292 case IBLND_MSG_PUT_REQ:
295 case IBLND_MSG_PUT_ACK:
296 case IBLND_MSG_GET_REQ:
297 if (kiblnd_unpack_rd(msg, flip))
301 case IBLND_MSG_PUT_NAK:
302 case IBLND_MSG_PUT_DONE:
303 case IBLND_MSG_GET_DONE:
305 __swab32s(&msg->ibm_u.completion.ibcm_status);
308 case IBLND_MSG_CONNREQ:
309 case IBLND_MSG_CONNACK:
311 __swab16s(&msg->ibm_u.connparams.ibcp_queue_depth);
312 __swab16s(&msg->ibm_u.connparams.ibcp_max_frags);
313 __swab32s(&msg->ibm_u.connparams.ibcp_max_msg_size);
321 kiblnd_create_peer(lnet_ni_t *ni, kib_peer_t **peerp, lnet_nid_t nid)
324 kib_net_t *net = ni->ni_data;
325 int cpt = lnet_cpt_of_nid(nid);
328 LASSERT(net != NULL);
329 LASSERT(nid != LNET_NID_ANY);
331 LIBCFS_CPT_ALLOC(peer, lnet_cpt_table(), cpt, sizeof(*peer));
333 CERROR("Cannot allocate peer\n");
340 peer->ibp_last_alive = 0;
341 peer->ibp_max_frags = kiblnd_cfg_rdma_frags(peer->ibp_ni);
342 peer->ibp_queue_depth = ni->ni_peertxcredits;
343 atomic_set(&peer->ibp_refcount, 1); /* 1 ref for caller */
345 INIT_LIST_HEAD(&peer->ibp_list); /* not in the peer table yet */
346 INIT_LIST_HEAD(&peer->ibp_conns);
347 INIT_LIST_HEAD(&peer->ibp_tx_queue);
349 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
351 /* always called with a ref on ni, which prevents ni being shutdown */
352 LASSERT(net->ibn_shutdown == 0);
354 /* npeers only grows with the global lock held */
355 atomic_inc(&net->ibn_npeers);
357 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
364 kiblnd_destroy_peer (kib_peer_t *peer)
366 kib_net_t *net = peer->ibp_ni->ni_data;
368 LASSERT(net != NULL);
369 LASSERT (atomic_read(&peer->ibp_refcount) == 0);
370 LASSERT(!kiblnd_peer_active(peer));
371 LASSERT(kiblnd_peer_idle(peer));
372 LASSERT(list_empty(&peer->ibp_tx_queue));
374 LIBCFS_FREE(peer, sizeof(*peer));
376 /* NB a peer's connections keep a reference on their peer until
377 * they are destroyed, so we can be assured that _all_ state to do
378 * with this peer has been cleaned up when its refcount drops to
380 atomic_dec(&net->ibn_npeers);
384 kiblnd_find_peer_locked (lnet_nid_t nid)
386 /* the caller is responsible for accounting the additional reference
387 * that this creates */
388 struct list_head *peer_list = kiblnd_nid2peerlist(nid);
389 struct list_head *tmp;
392 list_for_each(tmp, peer_list) {
394 peer = list_entry(tmp, kib_peer_t, ibp_list);
395 LASSERT(!kiblnd_peer_idle(peer));
397 if (peer->ibp_nid != nid)
400 CDEBUG(D_NET, "got peer [%p] -> %s (%d) version: %x\n",
401 peer, libcfs_nid2str(nid),
402 atomic_read(&peer->ibp_refcount),
410 kiblnd_unlink_peer_locked (kib_peer_t *peer)
412 LASSERT(list_empty(&peer->ibp_conns));
414 LASSERT (kiblnd_peer_active(peer));
415 list_del_init(&peer->ibp_list);
416 /* lose peerlist's ref */
417 kiblnd_peer_decref(peer);
421 kiblnd_get_peer_info(lnet_ni_t *ni, int index,
422 lnet_nid_t *nidp, int *count)
425 struct list_head *ptmp;
429 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
431 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
433 list_for_each(ptmp, &kiblnd_data.kib_peers[i]) {
435 peer = list_entry(ptmp, kib_peer_t, ibp_list);
436 LASSERT(!kiblnd_peer_idle(peer));
438 if (peer->ibp_ni != ni)
444 *nidp = peer->ibp_nid;
445 *count = atomic_read(&peer->ibp_refcount);
447 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
453 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
458 kiblnd_del_peer_locked (kib_peer_t *peer)
460 struct list_head *ctmp;
461 struct list_head *cnxt;
464 if (list_empty(&peer->ibp_conns)) {
465 kiblnd_unlink_peer_locked(peer);
467 list_for_each_safe(ctmp, cnxt, &peer->ibp_conns) {
468 conn = list_entry(ctmp, kib_conn_t, ibc_list);
470 kiblnd_close_conn_locked(conn, 0);
472 /* NB closing peer's last conn unlinked it. */
474 /* NB peer now unlinked; might even be freed if the peer table had the
479 kiblnd_del_peer (lnet_ni_t *ni, lnet_nid_t nid)
481 struct list_head zombies = LIST_HEAD_INIT(zombies);
482 struct list_head *ptmp;
483 struct list_head *pnxt;
491 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
493 if (nid != LNET_NID_ANY) {
494 lo = hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
497 hi = kiblnd_data.kib_peer_hash_size - 1;
500 for (i = lo; i <= hi; i++) {
501 list_for_each_safe(ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
502 peer = list_entry(ptmp, kib_peer_t, ibp_list);
503 LASSERT(!kiblnd_peer_idle(peer));
505 if (peer->ibp_ni != ni)
508 if (!(nid == LNET_NID_ANY || peer->ibp_nid == nid))
511 if (!list_empty(&peer->ibp_tx_queue)) {
512 LASSERT(list_empty(&peer->ibp_conns));
514 list_splice_init(&peer->ibp_tx_queue,
518 kiblnd_del_peer_locked(peer);
519 rc = 0; /* matched something */
523 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
525 kiblnd_txlist_done(ni, &zombies, -EIO);
531 kiblnd_get_conn_by_idx(lnet_ni_t *ni, int index)
534 struct list_head *ptmp;
536 struct list_head *ctmp;
540 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
542 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
543 list_for_each(ptmp, &kiblnd_data.kib_peers[i]) {
545 peer = list_entry(ptmp, kib_peer_t, ibp_list);
546 LASSERT(!kiblnd_peer_idle(peer));
548 if (peer->ibp_ni != ni)
551 list_for_each(ctmp, &peer->ibp_conns) {
555 conn = list_entry(ctmp, kib_conn_t, ibc_list);
556 kiblnd_conn_addref(conn);
557 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
564 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
569 kiblnd_debug_rx (kib_rx_t *rx)
571 CDEBUG(D_CONSOLE, " %p status %d msg_type %x cred %d\n",
572 rx, rx->rx_status, rx->rx_msg->ibm_type,
573 rx->rx_msg->ibm_credits);
577 kiblnd_debug_tx (kib_tx_t *tx)
579 CDEBUG(D_CONSOLE, " %p snd %d q %d w %d rc %d dl %lx "
580 "cookie %#llx msg %s%s type %x cred %d\n",
581 tx, tx->tx_sending, tx->tx_queued, tx->tx_waiting,
582 tx->tx_status, tx->tx_deadline, tx->tx_cookie,
583 tx->tx_lntmsg[0] == NULL ? "-" : "!",
584 tx->tx_lntmsg[1] == NULL ? "-" : "!",
585 tx->tx_msg->ibm_type, tx->tx_msg->ibm_credits);
589 kiblnd_debug_conn (kib_conn_t *conn)
591 struct list_head *tmp;
594 spin_lock(&conn->ibc_lock);
596 CDEBUG(D_CONSOLE, "conn[%d] %p [version %x] -> %s:\n",
597 atomic_read(&conn->ibc_refcount), conn,
598 conn->ibc_version, libcfs_nid2str(conn->ibc_peer->ibp_nid));
599 CDEBUG(D_CONSOLE, " state %d nposted %d/%d cred %d o_cred %d "
600 " r_cred %d\n", conn->ibc_state, conn->ibc_noops_posted,
601 conn->ibc_nsends_posted, conn->ibc_credits,
602 conn->ibc_outstanding_credits, conn->ibc_reserved_credits);
603 CDEBUG(D_CONSOLE, " comms_err %d\n", conn->ibc_comms_error);
605 CDEBUG(D_CONSOLE, " early_rxs:\n");
606 list_for_each(tmp, &conn->ibc_early_rxs)
607 kiblnd_debug_rx(list_entry(tmp, kib_rx_t, rx_list));
609 CDEBUG(D_CONSOLE, " tx_noops:\n");
610 list_for_each(tmp, &conn->ibc_tx_noops)
611 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
613 CDEBUG(D_CONSOLE, " tx_queue_nocred:\n");
614 list_for_each(tmp, &conn->ibc_tx_queue_nocred)
615 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
617 CDEBUG(D_CONSOLE, " tx_queue_rsrvd:\n");
618 list_for_each(tmp, &conn->ibc_tx_queue_rsrvd)
619 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
621 CDEBUG(D_CONSOLE, " tx_queue:\n");
622 list_for_each(tmp, &conn->ibc_tx_queue)
623 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
625 CDEBUG(D_CONSOLE, " active_txs:\n");
626 list_for_each(tmp, &conn->ibc_active_txs)
627 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
629 CDEBUG(D_CONSOLE, " rxs:\n");
630 for (i = 0; i < IBLND_RX_MSGS(conn); i++)
631 kiblnd_debug_rx(&conn->ibc_rxs[i]);
633 spin_unlock(&conn->ibc_lock);
637 kiblnd_translate_mtu(int value)
658 kiblnd_setup_mtu_locked(struct rdma_cm_id *cmid)
662 /* XXX There is no path record for iWARP, set by netdev->change_mtu? */
663 if (cmid->route.path_rec == NULL)
666 mtu = kiblnd_translate_mtu(*kiblnd_tunables.kib_ib_mtu);
669 cmid->route.path_rec->mtu = mtu;
673 kiblnd_get_completion_vector(kib_conn_t *conn, int cpt)
681 vectors = conn->ibc_cmid->device->num_comp_vectors;
685 mask = cfs_cpt_cpumask(lnet_cpt_table(), cpt);
687 /* hash NID to CPU id in this partition... */
688 ibp_nid = conn->ibc_peer->ibp_nid;
689 off = do_div(ibp_nid, cpumask_weight(mask));
690 for_each_cpu(i, mask) {
700 kiblnd_create_conn(kib_peer_t *peer, struct rdma_cm_id *cmid,
701 int state, int version)
704 * If the new conn is created successfully it takes over the caller's
705 * ref on 'peer'. It also "owns" 'cmid' and destroys it when it itself
706 * is destroyed. On failure, the caller's ref on 'peer' remains and
707 * she must dispose of 'cmid'. (Actually I'd block forever if I tried
708 * to destroy 'cmid' here since I'm called from the CM which still has
709 * its ref on 'cmid'). */
710 rwlock_t *glock = &kiblnd_data.kib_global_lock;
711 kib_net_t *net = peer->ibp_ni->ni_data;
713 struct ib_qp_init_attr *init_qp_attr;
714 struct kib_sched_info *sched;
715 #ifdef HAVE_IB_CQ_INIT_ATTR
716 struct ib_cq_init_attr cq_attr = {};
725 LASSERT(net != NULL);
726 LASSERT(!in_interrupt());
730 cpt = lnet_cpt_of_nid(peer->ibp_nid);
731 sched = kiblnd_data.kib_scheds[cpt];
733 LASSERT(sched->ibs_nthreads > 0);
735 LIBCFS_CPT_ALLOC(init_qp_attr, lnet_cpt_table(), cpt,
736 sizeof(*init_qp_attr));
737 if (init_qp_attr == NULL) {
738 CERROR("Can't allocate qp_attr for %s\n",
739 libcfs_nid2str(peer->ibp_nid));
743 LIBCFS_CPT_ALLOC(conn, lnet_cpt_table(), cpt, sizeof(*conn));
745 CERROR("Can't allocate connection for %s\n",
746 libcfs_nid2str(peer->ibp_nid));
750 conn->ibc_state = IBLND_CONN_INIT;
751 conn->ibc_version = version;
752 conn->ibc_peer = peer; /* I take the caller's ref */
753 cmid->context = conn; /* for future CM callbacks */
754 conn->ibc_cmid = cmid;
755 conn->ibc_max_frags = peer->ibp_max_frags;
756 conn->ibc_queue_depth = peer->ibp_queue_depth;
758 INIT_LIST_HEAD(&conn->ibc_early_rxs);
759 INIT_LIST_HEAD(&conn->ibc_tx_noops);
760 INIT_LIST_HEAD(&conn->ibc_tx_queue);
761 INIT_LIST_HEAD(&conn->ibc_tx_queue_rsrvd);
762 INIT_LIST_HEAD(&conn->ibc_tx_queue_nocred);
763 INIT_LIST_HEAD(&conn->ibc_active_txs);
764 spin_lock_init(&conn->ibc_lock);
766 LIBCFS_CPT_ALLOC(conn->ibc_connvars, lnet_cpt_table(), cpt,
767 sizeof(*conn->ibc_connvars));
768 if (conn->ibc_connvars == NULL) {
769 CERROR("Can't allocate in-progress connection state\n");
773 write_lock_irqsave(glock, flags);
774 if (dev->ibd_failover) {
775 write_unlock_irqrestore(glock, flags);
776 CERROR("%s: failover in progress\n", dev->ibd_ifname);
780 if (dev->ibd_hdev->ibh_ibdev != cmid->device) {
781 /* wakeup failover thread and teardown connection */
782 if (kiblnd_dev_can_failover(dev)) {
783 list_add_tail(&dev->ibd_fail_list,
784 &kiblnd_data.kib_failed_devs);
785 wake_up(&kiblnd_data.kib_failover_waitq);
788 write_unlock_irqrestore(glock, flags);
789 CERROR("cmid HCA(%s), kib_dev(%s) need failover\n",
790 cmid->device->name, dev->ibd_ifname);
794 kiblnd_hdev_addref_locked(dev->ibd_hdev);
795 conn->ibc_hdev = dev->ibd_hdev;
797 kiblnd_setup_mtu_locked(cmid);
799 write_unlock_irqrestore(glock, flags);
801 LIBCFS_CPT_ALLOC(conn->ibc_rxs, lnet_cpt_table(), cpt,
802 IBLND_RX_MSGS(conn) * sizeof(kib_rx_t));
803 if (conn->ibc_rxs == NULL) {
804 CERROR("Cannot allocate RX buffers\n");
808 rc = kiblnd_alloc_pages(&conn->ibc_rx_pages, cpt,
809 IBLND_RX_MSG_PAGES(conn));
813 kiblnd_map_rx_descs(conn);
815 #ifdef HAVE_IB_CQ_INIT_ATTR
816 cq_attr.cqe = IBLND_CQ_ENTRIES(conn);
817 cq_attr.comp_vector = kiblnd_get_completion_vector(conn, cpt);
818 cq = ib_create_cq(cmid->device,
819 kiblnd_cq_completion, kiblnd_cq_event, conn,
822 cq = ib_create_cq(cmid->device,
823 kiblnd_cq_completion, kiblnd_cq_event, conn,
824 IBLND_CQ_ENTRIES(conn),
825 kiblnd_get_completion_vector(conn, cpt));
828 CERROR("Failed to create CQ with %d CQEs: %ld\n",
829 IBLND_CQ_ENTRIES(conn), PTR_ERR(cq));
835 rc = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
837 CERROR("Can't request completion notification: %d\n", rc);
841 init_qp_attr->event_handler = kiblnd_qp_event;
842 init_qp_attr->qp_context = conn;
843 init_qp_attr->cap.max_send_wr = IBLND_SEND_WRS(conn);
844 init_qp_attr->cap.max_recv_wr = IBLND_RECV_WRS(conn);
845 init_qp_attr->cap.max_send_sge = 1;
846 init_qp_attr->cap.max_recv_sge = 1;
847 init_qp_attr->sq_sig_type = IB_SIGNAL_REQ_WR;
848 init_qp_attr->qp_type = IB_QPT_RC;
849 init_qp_attr->send_cq = cq;
850 init_qp_attr->recv_cq = cq;
852 conn->ibc_sched = sched;
855 rc = rdma_create_qp(cmid, conn->ibc_hdev->ibh_pd, init_qp_attr);
856 if (!rc || init_qp_attr->cap.max_send_wr < 16)
859 init_qp_attr->cap.max_send_wr -= init_qp_attr->cap.max_send_wr / 4;
863 CERROR("Can't create QP: %d, send_wr: %d, recv_wr: %d\n",
864 rc, init_qp_attr->cap.max_send_wr,
865 init_qp_attr->cap.max_recv_wr);
869 if (init_qp_attr->cap.max_send_wr != IBLND_SEND_WRS(conn))
870 CDEBUG(D_NET, "original send wr %d, created with %d\n",
871 IBLND_SEND_WRS(conn), init_qp_attr->cap.max_send_wr);
873 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
875 /* 1 ref for caller and each rxmsg */
876 atomic_set(&conn->ibc_refcount, 1 + IBLND_RX_MSGS(conn));
877 conn->ibc_nrx = IBLND_RX_MSGS(conn);
880 for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
881 rc = kiblnd_post_rx(&conn->ibc_rxs[i], IBLND_POSTRX_NO_CREDIT);
883 CERROR("Can't post rxmsg: %d\n", rc);
885 /* Make posted receives complete */
886 kiblnd_abort_receives(conn);
888 /* correct # of posted buffers
889 * NB locking needed now I'm racing with completion */
890 spin_lock_irqsave(&sched->ibs_lock, flags);
891 conn->ibc_nrx -= IBLND_RX_MSGS(conn) - i;
892 spin_unlock_irqrestore(&sched->ibs_lock, flags);
894 /* cmid will be destroyed by CM(ofed) after cm_callback
895 * returned, so we can't refer it anymore
896 * (by kiblnd_connd()->kiblnd_destroy_conn) */
897 rdma_destroy_qp(conn->ibc_cmid);
898 conn->ibc_cmid = NULL;
900 /* Drop my own and unused rxbuffer refcounts */
901 while (i++ <= IBLND_RX_MSGS(conn))
902 kiblnd_conn_decref(conn);
908 /* Init successful! */
909 LASSERT (state == IBLND_CONN_ACTIVE_CONNECT ||
910 state == IBLND_CONN_PASSIVE_WAIT);
911 conn->ibc_state = state;
914 atomic_inc(&net->ibn_nconns);
918 kiblnd_destroy_conn(conn, true);
920 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
926 kiblnd_destroy_conn(kib_conn_t *conn, bool free_conn)
928 struct rdma_cm_id *cmid = conn->ibc_cmid;
929 kib_peer_t *peer = conn->ibc_peer;
932 LASSERT (!in_interrupt());
933 LASSERT (atomic_read(&conn->ibc_refcount) == 0);
934 LASSERT(list_empty(&conn->ibc_early_rxs));
935 LASSERT(list_empty(&conn->ibc_tx_noops));
936 LASSERT(list_empty(&conn->ibc_tx_queue));
937 LASSERT(list_empty(&conn->ibc_tx_queue_rsrvd));
938 LASSERT(list_empty(&conn->ibc_tx_queue_nocred));
939 LASSERT(list_empty(&conn->ibc_active_txs));
940 LASSERT (conn->ibc_noops_posted == 0);
941 LASSERT (conn->ibc_nsends_posted == 0);
943 switch (conn->ibc_state) {
945 /* conn must be completely disengaged from the network */
948 case IBLND_CONN_DISCONNECTED:
949 /* connvars should have been freed already */
950 LASSERT (conn->ibc_connvars == NULL);
953 case IBLND_CONN_INIT:
957 /* conn->ibc_cmid might be destroyed by CM already */
958 if (cmid != NULL && cmid->qp != NULL)
959 rdma_destroy_qp(cmid);
961 if (conn->ibc_cq != NULL) {
962 rc = ib_destroy_cq(conn->ibc_cq);
964 CWARN("Error destroying CQ: %d\n", rc);
967 if (conn->ibc_rx_pages != NULL)
968 kiblnd_unmap_rx_descs(conn);
970 if (conn->ibc_rxs != NULL) {
971 LIBCFS_FREE(conn->ibc_rxs,
972 IBLND_RX_MSGS(conn) * sizeof(kib_rx_t));
975 if (conn->ibc_connvars != NULL)
976 LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
978 if (conn->ibc_hdev != NULL)
979 kiblnd_hdev_decref(conn->ibc_hdev);
981 /* See CAVEAT EMPTOR above in kiblnd_create_conn */
982 if (conn->ibc_state != IBLND_CONN_INIT) {
983 kib_net_t *net = peer->ibp_ni->ni_data;
985 kiblnd_peer_decref(peer);
986 rdma_destroy_id(cmid);
987 atomic_dec(&net->ibn_nconns);
991 LIBCFS_FREE(conn, sizeof(*conn));
995 kiblnd_close_peer_conns_locked(kib_peer_t *peer, int why)
998 struct list_head *ctmp;
999 struct list_head *cnxt;
1002 list_for_each_safe(ctmp, cnxt, &peer->ibp_conns) {
1003 conn = list_entry(ctmp, kib_conn_t, ibc_list);
1005 CDEBUG(D_NET, "Closing conn -> %s, "
1006 "version: %x, reason: %d\n",
1007 libcfs_nid2str(peer->ibp_nid),
1008 conn->ibc_version, why);
1010 kiblnd_close_conn_locked(conn, why);
1018 kiblnd_close_stale_conns_locked(kib_peer_t *peer,
1019 int version, __u64 incarnation)
1022 struct list_head *ctmp;
1023 struct list_head *cnxt;
1026 list_for_each_safe(ctmp, cnxt, &peer->ibp_conns) {
1027 conn = list_entry(ctmp, kib_conn_t, ibc_list);
1029 if (conn->ibc_version == version &&
1030 conn->ibc_incarnation == incarnation)
1033 CDEBUG(D_NET, "Closing stale conn -> %s version: %x, "
1034 "incarnation:%#llx(%x, %#llx)\n",
1035 libcfs_nid2str(peer->ibp_nid),
1036 conn->ibc_version, conn->ibc_incarnation,
1037 version, incarnation);
1039 kiblnd_close_conn_locked(conn, -ESTALE);
1047 kiblnd_close_matching_conns(lnet_ni_t *ni, lnet_nid_t nid)
1050 struct list_head *ptmp;
1051 struct list_head *pnxt;
1055 unsigned long flags;
1058 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1060 if (nid != LNET_NID_ANY)
1061 lo = hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
1064 hi = kiblnd_data.kib_peer_hash_size - 1;
1067 for (i = lo; i <= hi; i++) {
1068 list_for_each_safe(ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
1070 peer = list_entry(ptmp, kib_peer_t, ibp_list);
1071 LASSERT(!kiblnd_peer_idle(peer));
1073 if (peer->ibp_ni != ni)
1076 if (!(nid == LNET_NID_ANY || nid == peer->ibp_nid))
1079 count += kiblnd_close_peer_conns_locked(peer, 0);
1083 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1085 /* wildcards always succeed */
1086 if (nid == LNET_NID_ANY)
1089 return (count == 0) ? -ENOENT : 0;
1093 kiblnd_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg)
1095 struct libcfs_ioctl_data *data = arg;
1099 case IOC_LIBCFS_GET_PEER: {
1103 rc = kiblnd_get_peer_info(ni, data->ioc_count,
1105 data->ioc_nid = nid;
1106 data->ioc_count = count;
1110 case IOC_LIBCFS_DEL_PEER: {
1111 rc = kiblnd_del_peer(ni, data->ioc_nid);
1114 case IOC_LIBCFS_GET_CONN: {
1118 conn = kiblnd_get_conn_by_idx(ni, data->ioc_count);
1124 LASSERT (conn->ibc_cmid != NULL);
1125 data->ioc_nid = conn->ibc_peer->ibp_nid;
1126 if (conn->ibc_cmid->route.path_rec == NULL)
1127 data->ioc_u32[0] = 0; /* iWarp has no path MTU */
1130 ib_mtu_enum_to_int(conn->ibc_cmid->route.path_rec->mtu);
1131 kiblnd_conn_decref(conn);
1134 case IOC_LIBCFS_CLOSE_CONNECTION: {
1135 rc = kiblnd_close_matching_conns(ni, data->ioc_nid);
1147 kiblnd_query(lnet_ni_t *ni, lnet_nid_t nid, cfs_time_t *when)
1149 cfs_time_t last_alive = 0;
1150 cfs_time_t now = cfs_time_current();
1151 rwlock_t *glock = &kiblnd_data.kib_global_lock;
1153 unsigned long flags;
1155 read_lock_irqsave(glock, flags);
1157 peer = kiblnd_find_peer_locked(nid);
1159 last_alive = peer->ibp_last_alive;
1161 read_unlock_irqrestore(glock, flags);
1163 if (last_alive != 0)
1166 /* peer is not persistent in hash, trigger peer creation
1167 * and connection establishment with a NULL tx */
1169 kiblnd_launch_tx(ni, NULL, nid);
1171 CDEBUG(D_NET, "Peer %s %p, alive %ld secs ago\n",
1172 libcfs_nid2str(nid), peer,
1173 last_alive ? cfs_duration_sec(now - last_alive) : -1);
1178 kiblnd_free_pages(kib_pages_t *p)
1180 int npages = p->ibp_npages;
1183 for (i = 0; i < npages; i++) {
1184 if (p->ibp_pages[i] != NULL)
1185 __free_page(p->ibp_pages[i]);
1188 LIBCFS_FREE(p, offsetof(kib_pages_t, ibp_pages[npages]));
1192 kiblnd_alloc_pages(kib_pages_t **pp, int cpt, int npages)
1197 LIBCFS_CPT_ALLOC(p, lnet_cpt_table(), cpt,
1198 offsetof(kib_pages_t, ibp_pages[npages]));
1200 CERROR("Can't allocate descriptor for %d pages\n", npages);
1204 memset(p, 0, offsetof(kib_pages_t, ibp_pages[npages]));
1205 p->ibp_npages = npages;
1207 for (i = 0; i < npages; i++) {
1208 p->ibp_pages[i] = cfs_page_cpt_alloc(lnet_cpt_table(), cpt,
1210 if (p->ibp_pages[i] == NULL) {
1211 CERROR("Can't allocate page %d of %d\n", i, npages);
1212 kiblnd_free_pages(p);
1222 kiblnd_unmap_rx_descs(kib_conn_t *conn)
1227 LASSERT (conn->ibc_rxs != NULL);
1228 LASSERT (conn->ibc_hdev != NULL);
1230 for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
1231 rx = &conn->ibc_rxs[i];
1233 LASSERT(rx->rx_nob >= 0); /* not posted */
1235 kiblnd_dma_unmap_single(conn->ibc_hdev->ibh_ibdev,
1236 KIBLND_UNMAP_ADDR(rx, rx_msgunmap,
1238 IBLND_MSG_SIZE, DMA_FROM_DEVICE);
1241 kiblnd_free_pages(conn->ibc_rx_pages);
1243 conn->ibc_rx_pages = NULL;
1247 kiblnd_map_rx_descs(kib_conn_t *conn)
1255 for (pg_off = ipg = i = 0; i < IBLND_RX_MSGS(conn); i++) {
1256 pg = conn->ibc_rx_pages->ibp_pages[ipg];
1257 rx = &conn->ibc_rxs[i];
1260 rx->rx_msg = (kib_msg_t *)(((char *)page_address(pg)) + pg_off);
1263 kiblnd_dma_map_single(conn->ibc_hdev->ibh_ibdev,
1264 rx->rx_msg, IBLND_MSG_SIZE,
1266 LASSERT(!kiblnd_dma_mapping_error(conn->ibc_hdev->ibh_ibdev,
1268 KIBLND_UNMAP_ADDR_SET(rx, rx_msgunmap, rx->rx_msgaddr);
1270 CDEBUG(D_NET, "rx %d: %p %#llx(%#llx)\n",
1271 i, rx->rx_msg, rx->rx_msgaddr,
1272 (__u64)(page_to_phys(pg) + pg_off));
1274 pg_off += IBLND_MSG_SIZE;
1275 LASSERT(pg_off <= PAGE_SIZE);
1277 if (pg_off == PAGE_SIZE) {
1280 LASSERT(ipg <= IBLND_RX_MSG_PAGES(conn));
1286 kiblnd_unmap_tx_pool(kib_tx_pool_t *tpo)
1288 kib_hca_dev_t *hdev = tpo->tpo_hdev;
1292 LASSERT (tpo->tpo_pool.po_allocated == 0);
1297 for (i = 0; i < tpo->tpo_pool.po_size; i++) {
1298 tx = &tpo->tpo_tx_descs[i];
1299 kiblnd_dma_unmap_single(hdev->ibh_ibdev,
1300 KIBLND_UNMAP_ADDR(tx, tx_msgunmap,
1302 IBLND_MSG_SIZE, DMA_TO_DEVICE);
1305 kiblnd_hdev_decref(hdev);
1306 tpo->tpo_hdev = NULL;
1309 static kib_hca_dev_t *
1310 kiblnd_current_hdev(kib_dev_t *dev)
1312 kib_hca_dev_t *hdev;
1313 unsigned long flags;
1316 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1317 while (dev->ibd_failover) {
1318 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1320 CDEBUG(D_NET, "%s: Wait for failover\n",
1322 set_current_state(TASK_INTERRUPTIBLE);
1323 schedule_timeout(cfs_time_seconds(1) / 100);
1325 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1328 kiblnd_hdev_addref_locked(dev->ibd_hdev);
1329 hdev = dev->ibd_hdev;
1331 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1337 kiblnd_map_tx_pool(kib_tx_pool_t *tpo)
1339 kib_pages_t *txpgs = tpo->tpo_tx_pages;
1340 kib_pool_t *pool = &tpo->tpo_pool;
1341 kib_net_t *net = pool->po_owner->ps_net;
1349 LASSERT (net != NULL);
1353 /* pre-mapped messages are not bigger than 1 page */
1354 CLASSERT (IBLND_MSG_SIZE <= PAGE_SIZE);
1356 /* No fancy arithmetic when we do the buffer calculations */
1357 CLASSERT (PAGE_SIZE % IBLND_MSG_SIZE == 0);
1359 tpo->tpo_hdev = kiblnd_current_hdev(dev);
1361 for (ipage = page_offset = i = 0; i < pool->po_size; i++) {
1362 page = txpgs->ibp_pages[ipage];
1363 tx = &tpo->tpo_tx_descs[i];
1365 tx->tx_msg = (kib_msg_t *)(((char *)page_address(page)) +
1368 tx->tx_msgaddr = kiblnd_dma_map_single(tpo->tpo_hdev->ibh_ibdev,
1372 LASSERT(!kiblnd_dma_mapping_error(tpo->tpo_hdev->ibh_ibdev,
1374 KIBLND_UNMAP_ADDR_SET(tx, tx_msgunmap, tx->tx_msgaddr);
1376 list_add(&tx->tx_list, &pool->po_free_list);
1378 page_offset += IBLND_MSG_SIZE;
1379 LASSERT(page_offset <= PAGE_SIZE);
1381 if (page_offset == PAGE_SIZE) {
1384 LASSERT(ipage <= txpgs->ibp_npages);
1390 kiblnd_find_rd_dma_mr(struct lnet_ni *ni, kib_rdma_desc_t *rd,
1391 int negotiated_nfrags)
1393 kib_net_t *net = ni->ni_data;
1394 kib_hca_dev_t *hdev = net->ibn_dev->ibd_hdev;
1395 struct lnet_ioctl_config_o2iblnd_tunables *tunables;
1399 tunables = &ni->ni_lnd_tunables->lt_tun_u.lt_o2ib;
1400 mod = tunables->lnd_map_on_demand;
1401 nfrags = (negotiated_nfrags != -1) ? negotiated_nfrags : mod;
1403 LASSERT(hdev->ibh_mrs != NULL);
1405 if (mod > 0 && nfrags <= rd->rd_nfrags)
1408 return hdev->ibh_mrs;
1412 kiblnd_destroy_fmr_pool(kib_fmr_pool_t *fpo)
1414 LASSERT(fpo->fpo_map_count == 0);
1416 if (fpo->fpo_is_fmr) {
1417 if (fpo->fmr.fpo_fmr_pool)
1418 ib_destroy_fmr_pool(fpo->fmr.fpo_fmr_pool);
1420 struct kib_fast_reg_descriptor *frd, *tmp;
1423 list_for_each_entry_safe(frd, tmp, &fpo->fast_reg.fpo_pool_list,
1425 list_del(&frd->frd_list);
1426 #ifndef HAVE_IB_MAP_MR_SG
1427 ib_free_fast_reg_page_list(frd->frd_frpl);
1429 ib_dereg_mr(frd->frd_mr);
1430 LIBCFS_FREE(frd, sizeof(*frd));
1433 if (i < fpo->fast_reg.fpo_pool_size)
1434 CERROR("FastReg pool still has %d regions registered\n",
1435 fpo->fast_reg.fpo_pool_size - i);
1439 kiblnd_hdev_decref(fpo->fpo_hdev);
1441 LIBCFS_FREE(fpo, sizeof(*fpo));
1445 kiblnd_destroy_fmr_pool_list(struct list_head *head)
1447 kib_fmr_pool_t *fpo, *tmp;
1449 list_for_each_entry_safe(fpo, tmp, head, fpo_list) {
1450 list_del(&fpo->fpo_list);
1451 kiblnd_destroy_fmr_pool(fpo);
1456 kiblnd_fmr_pool_size(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
1459 int size = tunables->lnd_fmr_pool_size / ncpts;
1461 return max(IBLND_FMR_POOL, size);
1465 kiblnd_fmr_flush_trigger(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
1468 int size = tunables->lnd_fmr_flush_trigger / ncpts;
1470 return max(IBLND_FMR_POOL_FLUSH, size);
1473 static int kiblnd_alloc_fmr_pool(kib_fmr_poolset_t *fps, kib_fmr_pool_t *fpo)
1475 struct ib_fmr_pool_param param = {
1476 .max_pages_per_fmr = LNET_MAX_PAYLOAD/PAGE_SIZE,
1477 .page_shift = PAGE_SHIFT,
1478 .access = (IB_ACCESS_LOCAL_WRITE |
1479 IB_ACCESS_REMOTE_WRITE),
1480 .pool_size = fps->fps_pool_size,
1481 .dirty_watermark = fps->fps_flush_trigger,
1482 .flush_function = NULL,
1484 .cache = !!fps->fps_cache };
1487 fpo->fmr.fpo_fmr_pool = ib_create_fmr_pool(fpo->fpo_hdev->ibh_pd,
1489 if (IS_ERR(fpo->fmr.fpo_fmr_pool)) {
1490 rc = PTR_ERR(fpo->fmr.fpo_fmr_pool);
1492 CERROR("Failed to create FMR pool: %d\n", rc);
1494 CERROR("FMRs are not supported\n");
1500 static int kiblnd_alloc_freg_pool(kib_fmr_poolset_t *fps, kib_fmr_pool_t *fpo)
1502 struct kib_fast_reg_descriptor *frd, *tmp;
1505 INIT_LIST_HEAD(&fpo->fast_reg.fpo_pool_list);
1506 fpo->fast_reg.fpo_pool_size = 0;
1507 for (i = 0; i < fps->fps_pool_size; i++) {
1508 LIBCFS_CPT_ALLOC(frd, lnet_cpt_table(), fps->fps_cpt,
1511 CERROR("Failed to allocate a new fast_reg descriptor\n");
1517 #ifndef HAVE_IB_MAP_MR_SG
1518 frd->frd_frpl = ib_alloc_fast_reg_page_list(fpo->fpo_hdev->ibh_ibdev,
1519 LNET_MAX_PAYLOAD/PAGE_SIZE);
1520 if (IS_ERR(frd->frd_frpl)) {
1521 rc = PTR_ERR(frd->frd_frpl);
1522 CERROR("Failed to allocate ib_fast_reg_page_list: %d\n",
1524 frd->frd_frpl = NULL;
1529 #ifdef HAVE_IB_ALLOC_FAST_REG_MR
1530 frd->frd_mr = ib_alloc_fast_reg_mr(fpo->fpo_hdev->ibh_pd,
1531 LNET_MAX_PAYLOAD/PAGE_SIZE);
1533 frd->frd_mr = ib_alloc_mr(fpo->fpo_hdev->ibh_pd,
1535 LNET_MAX_PAYLOAD/PAGE_SIZE);
1537 if (IS_ERR(frd->frd_mr)) {
1538 rc = PTR_ERR(frd->frd_mr);
1539 CERROR("Failed to allocate ib_fast_reg_mr: %d\n", rc);
1544 frd->frd_valid = true;
1546 list_add_tail(&frd->frd_list, &fpo->fast_reg.fpo_pool_list);
1547 fpo->fast_reg.fpo_pool_size++;
1554 ib_dereg_mr(frd->frd_mr);
1555 #ifndef HAVE_IB_MAP_MR_SG
1557 ib_free_fast_reg_page_list(frd->frd_frpl);
1559 LIBCFS_FREE(frd, sizeof(*frd));
1562 list_for_each_entry_safe(frd, tmp, &fpo->fast_reg.fpo_pool_list,
1564 list_del(&frd->frd_list);
1565 #ifndef HAVE_IB_MAP_MR_SG
1566 ib_free_fast_reg_page_list(frd->frd_frpl);
1568 ib_dereg_mr(frd->frd_mr);
1569 LIBCFS_FREE(frd, sizeof(*frd));
1576 kiblnd_create_fmr_pool(kib_fmr_poolset_t *fps, kib_fmr_pool_t **pp_fpo)
1578 struct ib_device_attr *dev_attr;
1579 kib_dev_t *dev = fps->fps_net->ibn_dev;
1580 kib_fmr_pool_t *fpo;
1583 #ifndef HAVE_IB_DEVICE_ATTRS
1584 dev_attr = kmalloc(sizeof(*dev_attr), GFP_KERNEL);
1589 LIBCFS_CPT_ALLOC(fpo, lnet_cpt_table(), fps->fps_cpt, sizeof(*fpo));
1595 fpo->fpo_hdev = kiblnd_current_hdev(dev);
1597 #ifdef HAVE_IB_DEVICE_ATTRS
1598 dev_attr = &fpo->fpo_hdev->ibh_ibdev->attrs;
1600 rc = ib_query_device(fpo->fpo_hdev->ibh_ibdev, dev_attr);
1602 CERROR("Query device failed for %s: %d\n",
1603 fpo->fpo_hdev->ibh_ibdev->name, rc);
1608 /* Check for FMR or FastReg support */
1609 fpo->fpo_is_fmr = 0;
1610 if (fpo->fpo_hdev->ibh_ibdev->alloc_fmr &&
1611 fpo->fpo_hdev->ibh_ibdev->dealloc_fmr &&
1612 fpo->fpo_hdev->ibh_ibdev->map_phys_fmr &&
1613 fpo->fpo_hdev->ibh_ibdev->unmap_fmr) {
1614 LCONSOLE_INFO("Using FMR for registration\n");
1615 fpo->fpo_is_fmr = 1;
1616 } else if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) {
1617 LCONSOLE_INFO("Using FastReg for registration\n");
1620 LCONSOLE_ERROR_MSG(rc, "IB device does not support FMRs nor FastRegs, can't register memory\n");
1624 if (fpo->fpo_is_fmr)
1625 rc = kiblnd_alloc_fmr_pool(fps, fpo);
1627 rc = kiblnd_alloc_freg_pool(fps, fpo);
1631 #ifndef HAVE_IB_DEVICE_ATTRS
1634 fpo->fpo_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1635 fpo->fpo_owner = fps;
1641 kiblnd_hdev_decref(fpo->fpo_hdev);
1642 LIBCFS_FREE(fpo, sizeof(*fpo));
1645 #ifndef HAVE_IB_DEVICE_ATTRS
1653 kiblnd_fail_fmr_poolset(kib_fmr_poolset_t *fps, struct list_head *zombies)
1655 if (fps->fps_net == NULL) /* intialized? */
1658 spin_lock(&fps->fps_lock);
1660 while (!list_empty(&fps->fps_pool_list)) {
1661 kib_fmr_pool_t *fpo = list_entry(fps->fps_pool_list.next,
1662 kib_fmr_pool_t, fpo_list);
1663 fpo->fpo_failed = 1;
1664 list_del(&fpo->fpo_list);
1665 if (fpo->fpo_map_count == 0)
1666 list_add(&fpo->fpo_list, zombies);
1668 list_add(&fpo->fpo_list, &fps->fps_failed_pool_list);
1671 spin_unlock(&fps->fps_lock);
1675 kiblnd_fini_fmr_poolset(kib_fmr_poolset_t *fps)
1677 if (fps->fps_net != NULL) { /* initialized? */
1678 kiblnd_destroy_fmr_pool_list(&fps->fps_failed_pool_list);
1679 kiblnd_destroy_fmr_pool_list(&fps->fps_pool_list);
1684 kiblnd_init_fmr_poolset(kib_fmr_poolset_t *fps, int cpt, int ncpts,
1686 struct lnet_ioctl_config_o2iblnd_tunables *tunables)
1688 kib_fmr_pool_t *fpo;
1691 memset(fps, 0, sizeof(kib_fmr_poolset_t));
1696 fps->fps_pool_size = kiblnd_fmr_pool_size(tunables, ncpts);
1697 fps->fps_flush_trigger = kiblnd_fmr_flush_trigger(tunables, ncpts);
1698 fps->fps_cache = tunables->lnd_fmr_cache;
1700 spin_lock_init(&fps->fps_lock);
1701 INIT_LIST_HEAD(&fps->fps_pool_list);
1702 INIT_LIST_HEAD(&fps->fps_failed_pool_list);
1704 rc = kiblnd_create_fmr_pool(fps, &fpo);
1706 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1712 kiblnd_fmr_pool_is_idle(kib_fmr_pool_t *fpo, cfs_time_t now)
1714 if (fpo->fpo_map_count != 0) /* still in use */
1716 if (fpo->fpo_failed)
1718 return cfs_time_aftereq(now, fpo->fpo_deadline);
1722 kiblnd_map_tx_pages(kib_tx_t *tx, kib_rdma_desc_t *rd)
1724 kib_hca_dev_t *hdev;
1725 __u64 *pages = tx->tx_pages;
1730 hdev = tx->tx_pool->tpo_hdev;
1732 for (i = 0, npages = 0; i < rd->rd_nfrags; i++) {
1733 for (size = 0; size < rd->rd_frags[i].rf_nob;
1734 size += hdev->ibh_page_size) {
1735 pages[npages++] = (rd->rd_frags[i].rf_addr &
1736 hdev->ibh_page_mask) + size;
1744 kiblnd_fmr_pool_unmap(kib_fmr_t *fmr, int status)
1746 struct list_head zombies = LIST_HEAD_INIT(zombies);
1747 kib_fmr_pool_t *fpo = fmr->fmr_pool;
1748 kib_fmr_poolset_t *fps;
1749 cfs_time_t now = cfs_time_current();
1750 kib_fmr_pool_t *tmp;
1756 fps = fpo->fpo_owner;
1757 if (fpo->fpo_is_fmr) {
1758 if (fmr->fmr_pfmr) {
1759 rc = ib_fmr_pool_unmap(fmr->fmr_pfmr);
1761 fmr->fmr_pfmr = NULL;
1765 rc = ib_flush_fmr_pool(fpo->fmr.fpo_fmr_pool);
1769 struct kib_fast_reg_descriptor *frd = fmr->fmr_frd;
1772 frd->frd_valid = false;
1773 spin_lock(&fps->fps_lock);
1774 list_add_tail(&frd->frd_list, &fpo->fast_reg.fpo_pool_list);
1775 spin_unlock(&fps->fps_lock);
1776 fmr->fmr_frd = NULL;
1779 fmr->fmr_pool = NULL;
1781 spin_lock(&fps->fps_lock);
1782 fpo->fpo_map_count--; /* decref the pool */
1784 list_for_each_entry_safe(fpo, tmp, &fps->fps_pool_list, fpo_list) {
1785 /* the first pool is persistent */
1786 if (fps->fps_pool_list.next == &fpo->fpo_list)
1789 if (kiblnd_fmr_pool_is_idle(fpo, now)) {
1790 list_move(&fpo->fpo_list, &zombies);
1794 spin_unlock(&fps->fps_lock);
1796 if (!list_empty(&zombies))
1797 kiblnd_destroy_fmr_pool_list(&zombies);
1801 kiblnd_fmr_pool_map(kib_fmr_poolset_t *fps, kib_tx_t *tx, kib_rdma_desc_t *rd,
1802 __u32 nob, __u64 iov, kib_fmr_t *fmr)
1804 kib_fmr_pool_t *fpo;
1805 __u64 *pages = tx->tx_pages;
1807 bool is_rx = (rd != tx->tx_rd);
1808 bool tx_pages_mapped = 0;
1813 spin_lock(&fps->fps_lock);
1814 version = fps->fps_version;
1815 list_for_each_entry(fpo, &fps->fps_pool_list, fpo_list) {
1816 fpo->fpo_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1817 fpo->fpo_map_count++;
1819 if (fpo->fpo_is_fmr) {
1820 struct ib_pool_fmr *pfmr;
1822 spin_unlock(&fps->fps_lock);
1824 if (!tx_pages_mapped) {
1825 npages = kiblnd_map_tx_pages(tx, rd);
1826 tx_pages_mapped = 1;
1829 pfmr = ib_fmr_pool_map_phys(fpo->fmr.fpo_fmr_pool,
1830 pages, npages, iov);
1831 if (likely(!IS_ERR(pfmr))) {
1832 fmr->fmr_key = is_rx ? pfmr->fmr->rkey
1834 fmr->fmr_frd = NULL;
1835 fmr->fmr_pfmr = pfmr;
1836 fmr->fmr_pool = fpo;
1841 if (!list_empty(&fpo->fast_reg.fpo_pool_list)) {
1842 struct kib_fast_reg_descriptor *frd;
1843 #ifdef HAVE_IB_MAP_MR_SG
1844 struct ib_reg_wr *wr;
1847 struct ib_rdma_wr *wr;
1848 struct ib_fast_reg_page_list *frpl;
1852 frd = list_first_entry(&fpo->fast_reg.fpo_pool_list,
1853 struct kib_fast_reg_descriptor,
1855 list_del(&frd->frd_list);
1856 spin_unlock(&fps->fps_lock);
1858 #ifndef HAVE_IB_MAP_MR_SG
1859 frpl = frd->frd_frpl;
1863 if (!frd->frd_valid) {
1864 struct ib_rdma_wr *inv_wr;
1865 __u32 key = is_rx ? mr->rkey : mr->lkey;
1867 inv_wr = &frd->frd_inv_wr;
1868 memset(inv_wr, 0, sizeof(*inv_wr));
1870 inv_wr->wr.opcode = IB_WR_LOCAL_INV;
1871 inv_wr->wr.wr_id = IBLND_WID_MR;
1872 inv_wr->wr.ex.invalidate_rkey = key;
1875 key = ib_inc_rkey(key);
1876 ib_update_fast_reg_key(mr, key);
1879 #ifdef HAVE_IB_MAP_MR_SG
1880 n = ib_map_mr_sg(mr, tx->tx_frags,
1881 tx->tx_nfrags, PAGE_SIZE);
1882 if (unlikely(n != tx->tx_nfrags)) {
1883 CERROR("Failed to map mr %d/%d "
1884 "elements\n", n, tx->tx_nfrags);
1885 return n < 0 ? n : -EINVAL;
1890 wr = &frd->frd_fastreg_wr;
1891 memset(wr, 0, sizeof(*wr));
1893 wr->wr.opcode = IB_WR_REG_MR;
1894 wr->wr.wr_id = IBLND_WID_MR;
1896 wr->wr.send_flags = 0;
1898 wr->key = is_rx ? mr->rkey : mr->lkey;
1899 wr->access = (IB_ACCESS_LOCAL_WRITE |
1900 IB_ACCESS_REMOTE_WRITE);
1902 if (!tx_pages_mapped) {
1903 npages = kiblnd_map_tx_pages(tx, rd);
1904 tx_pages_mapped = 1;
1907 LASSERT(npages <= frpl->max_page_list_len);
1908 memcpy(frpl->page_list, pages,
1909 sizeof(*pages) * npages);
1911 /* Prepare FastReg WR */
1912 wr = &frd->frd_fastreg_wr;
1913 memset(wr, 0, sizeof(*wr));
1915 wr->wr.opcode = IB_WR_FAST_REG_MR;
1916 wr->wr.wr_id = IBLND_WID_MR;
1918 wr->wr.wr.fast_reg.iova_start = iov;
1919 wr->wr.wr.fast_reg.page_list = frpl;
1920 wr->wr.wr.fast_reg.page_list_len = npages;
1921 wr->wr.wr.fast_reg.page_shift = PAGE_SHIFT;
1922 wr->wr.wr.fast_reg.length = nob;
1923 wr->wr.wr.fast_reg.rkey =
1924 is_rx ? mr->rkey : mr->lkey;
1925 wr->wr.wr.fast_reg.access_flags =
1926 (IB_ACCESS_LOCAL_WRITE |
1927 IB_ACCESS_REMOTE_WRITE);
1930 fmr->fmr_key = is_rx ? mr->rkey : mr->lkey;
1932 fmr->fmr_pfmr = NULL;
1933 fmr->fmr_pool = fpo;
1936 spin_unlock(&fps->fps_lock);
1940 spin_lock(&fps->fps_lock);
1941 fpo->fpo_map_count--;
1942 if (rc != -EAGAIN) {
1943 spin_unlock(&fps->fps_lock);
1947 /* EAGAIN and ... */
1948 if (version != fps->fps_version) {
1949 spin_unlock(&fps->fps_lock);
1954 if (fps->fps_increasing) {
1955 spin_unlock(&fps->fps_lock);
1956 CDEBUG(D_NET, "Another thread is allocating new "
1957 "FMR pool, waiting for her to complete\n");
1963 if (cfs_time_before(cfs_time_current(), fps->fps_next_retry)) {
1964 /* someone failed recently */
1965 spin_unlock(&fps->fps_lock);
1969 fps->fps_increasing = 1;
1970 spin_unlock(&fps->fps_lock);
1972 CDEBUG(D_NET, "Allocate new FMR pool\n");
1973 rc = kiblnd_create_fmr_pool(fps, &fpo);
1974 spin_lock(&fps->fps_lock);
1975 fps->fps_increasing = 0;
1978 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1980 fps->fps_next_retry = cfs_time_shift(IBLND_POOL_RETRY);
1982 spin_unlock(&fps->fps_lock);
1988 kiblnd_fini_pool(kib_pool_t *pool)
1990 LASSERT(list_empty(&pool->po_free_list));
1991 LASSERT(pool->po_allocated == 0);
1993 CDEBUG(D_NET, "Finalize %s pool\n", pool->po_owner->ps_name);
1997 kiblnd_init_pool(kib_poolset_t *ps, kib_pool_t *pool, int size)
1999 CDEBUG(D_NET, "Initialize %s pool\n", ps->ps_name);
2001 memset(pool, 0, sizeof(kib_pool_t));
2002 INIT_LIST_HEAD(&pool->po_free_list);
2003 pool->po_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
2004 pool->po_owner = ps;
2005 pool->po_size = size;
2009 kiblnd_destroy_pool_list(struct list_head *head)
2013 while (!list_empty(head)) {
2014 pool = list_entry(head->next, kib_pool_t, po_list);
2015 list_del(&pool->po_list);
2017 LASSERT(pool->po_owner != NULL);
2018 pool->po_owner->ps_pool_destroy(pool);
2023 kiblnd_fail_poolset(kib_poolset_t *ps, struct list_head *zombies)
2025 if (ps->ps_net == NULL) /* intialized? */
2028 spin_lock(&ps->ps_lock);
2029 while (!list_empty(&ps->ps_pool_list)) {
2030 kib_pool_t *po = list_entry(ps->ps_pool_list.next,
2031 kib_pool_t, po_list);
2033 list_del(&po->po_list);
2034 if (po->po_allocated == 0)
2035 list_add(&po->po_list, zombies);
2037 list_add(&po->po_list, &ps->ps_failed_pool_list);
2039 spin_unlock(&ps->ps_lock);
2043 kiblnd_fini_poolset(kib_poolset_t *ps)
2045 if (ps->ps_net != NULL) { /* initialized? */
2046 kiblnd_destroy_pool_list(&ps->ps_failed_pool_list);
2047 kiblnd_destroy_pool_list(&ps->ps_pool_list);
2052 kiblnd_init_poolset(kib_poolset_t *ps, int cpt,
2053 kib_net_t *net, char *name, int size,
2054 kib_ps_pool_create_t po_create,
2055 kib_ps_pool_destroy_t po_destroy,
2056 kib_ps_node_init_t nd_init,
2057 kib_ps_node_fini_t nd_fini)
2062 memset(ps, 0, sizeof(kib_poolset_t));
2066 ps->ps_pool_create = po_create;
2067 ps->ps_pool_destroy = po_destroy;
2068 ps->ps_node_init = nd_init;
2069 ps->ps_node_fini = nd_fini;
2070 ps->ps_pool_size = size;
2071 if (strlcpy(ps->ps_name, name, sizeof(ps->ps_name))
2072 >= sizeof(ps->ps_name))
2074 spin_lock_init(&ps->ps_lock);
2075 INIT_LIST_HEAD(&ps->ps_pool_list);
2076 INIT_LIST_HEAD(&ps->ps_failed_pool_list);
2078 rc = ps->ps_pool_create(ps, size, &pool);
2080 list_add(&pool->po_list, &ps->ps_pool_list);
2082 CERROR("Failed to create the first pool for %s\n", ps->ps_name);
2088 kiblnd_pool_is_idle(kib_pool_t *pool, cfs_time_t now)
2090 if (pool->po_allocated != 0) /* still in use */
2092 if (pool->po_failed)
2094 return cfs_time_aftereq(now, pool->po_deadline);
2098 kiblnd_pool_free_node(kib_pool_t *pool, struct list_head *node)
2100 struct list_head zombies = LIST_HEAD_INIT(zombies);
2101 kib_poolset_t *ps = pool->po_owner;
2103 cfs_time_t now = cfs_time_current();
2105 spin_lock(&ps->ps_lock);
2107 if (ps->ps_node_fini != NULL)
2108 ps->ps_node_fini(pool, node);
2110 LASSERT(pool->po_allocated > 0);
2111 list_add(node, &pool->po_free_list);
2112 pool->po_allocated--;
2114 list_for_each_entry_safe(pool, tmp, &ps->ps_pool_list, po_list) {
2115 /* the first pool is persistent */
2116 if (ps->ps_pool_list.next == &pool->po_list)
2119 if (kiblnd_pool_is_idle(pool, now))
2120 list_move(&pool->po_list, &zombies);
2122 spin_unlock(&ps->ps_lock);
2124 if (!list_empty(&zombies))
2125 kiblnd_destroy_pool_list(&zombies);
2129 kiblnd_pool_alloc_node(kib_poolset_t *ps)
2131 struct list_head *node;
2134 unsigned int interval = 1;
2135 cfs_time_t time_before;
2136 unsigned int trips = 0;
2139 spin_lock(&ps->ps_lock);
2140 list_for_each_entry(pool, &ps->ps_pool_list, po_list) {
2141 if (list_empty(&pool->po_free_list))
2144 pool->po_allocated++;
2145 pool->po_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
2146 node = pool->po_free_list.next;
2149 if (ps->ps_node_init != NULL) {
2150 /* still hold the lock */
2151 ps->ps_node_init(pool, node);
2153 spin_unlock(&ps->ps_lock);
2157 /* no available tx pool and ... */
2158 if (ps->ps_increasing) {
2159 /* another thread is allocating a new pool */
2160 spin_unlock(&ps->ps_lock);
2162 CDEBUG(D_NET, "Another thread is allocating new "
2163 "%s pool, waiting %d HZs for her to complete."
2165 ps->ps_name, interval, trips);
2167 set_current_state(TASK_INTERRUPTIBLE);
2168 schedule_timeout(interval);
2169 if (interval < cfs_time_seconds(1))
2175 if (cfs_time_before(cfs_time_current(), ps->ps_next_retry)) {
2176 /* someone failed recently */
2177 spin_unlock(&ps->ps_lock);
2181 ps->ps_increasing = 1;
2182 spin_unlock(&ps->ps_lock);
2184 CDEBUG(D_NET, "%s pool exhausted, allocate new pool\n", ps->ps_name);
2185 time_before = cfs_time_current();
2186 rc = ps->ps_pool_create(ps, ps->ps_pool_size, &pool);
2187 CDEBUG(D_NET, "ps_pool_create took %lu HZ to complete",
2188 cfs_time_current() - time_before);
2190 spin_lock(&ps->ps_lock);
2191 ps->ps_increasing = 0;
2193 list_add_tail(&pool->po_list, &ps->ps_pool_list);
2195 ps->ps_next_retry = cfs_time_shift(IBLND_POOL_RETRY);
2196 CERROR("Can't allocate new %s pool because out of memory\n",
2199 spin_unlock(&ps->ps_lock);
2205 kiblnd_destroy_tx_pool(kib_pool_t *pool)
2207 kib_tx_pool_t *tpo = container_of(pool, kib_tx_pool_t, tpo_pool);
2210 LASSERT (pool->po_allocated == 0);
2212 if (tpo->tpo_tx_pages != NULL) {
2213 kiblnd_unmap_tx_pool(tpo);
2214 kiblnd_free_pages(tpo->tpo_tx_pages);
2217 if (tpo->tpo_tx_descs == NULL)
2220 for (i = 0; i < pool->po_size; i++) {
2221 kib_tx_t *tx = &tpo->tpo_tx_descs[i];
2223 list_del(&tx->tx_list);
2224 if (tx->tx_pages != NULL)
2225 LIBCFS_FREE(tx->tx_pages,
2227 sizeof(*tx->tx_pages));
2228 if (tx->tx_frags != NULL)
2229 LIBCFS_FREE(tx->tx_frags,
2230 (1 + IBLND_MAX_RDMA_FRAGS) *
2231 sizeof(*tx->tx_frags));
2232 if (tx->tx_wrq != NULL)
2233 LIBCFS_FREE(tx->tx_wrq,
2234 (1 + IBLND_MAX_RDMA_FRAGS) *
2235 sizeof(*tx->tx_wrq));
2236 if (tx->tx_sge != NULL)
2237 LIBCFS_FREE(tx->tx_sge,
2238 (1 + IBLND_MAX_RDMA_FRAGS) *
2239 sizeof(*tx->tx_sge));
2240 if (tx->tx_rd != NULL)
2241 LIBCFS_FREE(tx->tx_rd,
2242 offsetof(kib_rdma_desc_t,
2243 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2246 LIBCFS_FREE(tpo->tpo_tx_descs,
2247 pool->po_size * sizeof(kib_tx_t));
2249 kiblnd_fini_pool(pool);
2250 LIBCFS_FREE(tpo, sizeof(kib_tx_pool_t));
2253 static int kiblnd_tx_pool_size(int ncpts)
2255 int ntx = *kiblnd_tunables.kib_ntx / ncpts;
2257 return max(IBLND_TX_POOL, ntx);
2261 kiblnd_create_tx_pool(kib_poolset_t *ps, int size, kib_pool_t **pp_po)
2268 LIBCFS_CPT_ALLOC(tpo, lnet_cpt_table(), ps->ps_cpt, sizeof(*tpo));
2270 CERROR("Failed to allocate TX pool\n");
2274 pool = &tpo->tpo_pool;
2275 kiblnd_init_pool(ps, pool, size);
2276 tpo->tpo_tx_descs = NULL;
2277 tpo->tpo_tx_pages = NULL;
2279 npg = (size * IBLND_MSG_SIZE + PAGE_SIZE - 1) / PAGE_SIZE;
2280 if (kiblnd_alloc_pages(&tpo->tpo_tx_pages, ps->ps_cpt, npg) != 0) {
2281 CERROR("Can't allocate tx pages: %d\n", npg);
2282 LIBCFS_FREE(tpo, sizeof(kib_tx_pool_t));
2286 LIBCFS_CPT_ALLOC(tpo->tpo_tx_descs, lnet_cpt_table(), ps->ps_cpt,
2287 size * sizeof(kib_tx_t));
2288 if (tpo->tpo_tx_descs == NULL) {
2289 CERROR("Can't allocate %d tx descriptors\n", size);
2290 ps->ps_pool_destroy(pool);
2294 memset(tpo->tpo_tx_descs, 0, size * sizeof(kib_tx_t));
2296 for (i = 0; i < size; i++) {
2297 kib_tx_t *tx = &tpo->tpo_tx_descs[i];
2300 if (ps->ps_net->ibn_fmr_ps != NULL) {
2301 LIBCFS_CPT_ALLOC(tx->tx_pages,
2302 lnet_cpt_table(), ps->ps_cpt,
2303 LNET_MAX_IOV * sizeof(*tx->tx_pages));
2304 if (tx->tx_pages == NULL)
2308 LIBCFS_CPT_ALLOC(tx->tx_frags, lnet_cpt_table(), ps->ps_cpt,
2309 (1 + IBLND_MAX_RDMA_FRAGS) *
2310 sizeof(*tx->tx_frags));
2311 if (tx->tx_frags == NULL)
2314 sg_init_table(tx->tx_frags, IBLND_MAX_RDMA_FRAGS + 1);
2316 LIBCFS_CPT_ALLOC(tx->tx_wrq, lnet_cpt_table(), ps->ps_cpt,
2317 (1 + IBLND_MAX_RDMA_FRAGS) *
2318 sizeof(*tx->tx_wrq));
2319 if (tx->tx_wrq == NULL)
2322 LIBCFS_CPT_ALLOC(tx->tx_sge, lnet_cpt_table(), ps->ps_cpt,
2323 (1 + IBLND_MAX_RDMA_FRAGS) *
2324 sizeof(*tx->tx_sge));
2325 if (tx->tx_sge == NULL)
2328 LIBCFS_CPT_ALLOC(tx->tx_rd, lnet_cpt_table(), ps->ps_cpt,
2329 offsetof(kib_rdma_desc_t,
2330 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2331 if (tx->tx_rd == NULL)
2336 kiblnd_map_tx_pool(tpo);
2341 ps->ps_pool_destroy(pool);
2346 kiblnd_tx_init(kib_pool_t *pool, struct list_head *node)
2348 kib_tx_poolset_t *tps = container_of(pool->po_owner, kib_tx_poolset_t,
2350 kib_tx_t *tx = list_entry(node, kib_tx_t, tx_list);
2352 tx->tx_cookie = tps->tps_next_tx_cookie++;
2356 kiblnd_net_fini_pools(kib_net_t *net)
2360 cfs_cpt_for_each(i, lnet_cpt_table()) {
2361 kib_tx_poolset_t *tps;
2362 kib_fmr_poolset_t *fps;
2364 if (net->ibn_tx_ps != NULL) {
2365 tps = net->ibn_tx_ps[i];
2366 kiblnd_fini_poolset(&tps->tps_poolset);
2369 if (net->ibn_fmr_ps != NULL) {
2370 fps = net->ibn_fmr_ps[i];
2371 kiblnd_fini_fmr_poolset(fps);
2375 if (net->ibn_tx_ps != NULL) {
2376 cfs_percpt_free(net->ibn_tx_ps);
2377 net->ibn_tx_ps = NULL;
2380 if (net->ibn_fmr_ps != NULL) {
2381 cfs_percpt_free(net->ibn_fmr_ps);
2382 net->ibn_fmr_ps = NULL;
2387 kiblnd_net_init_pools(kib_net_t *net, lnet_ni_t *ni, __u32 *cpts, int ncpts)
2389 struct lnet_ioctl_config_o2iblnd_tunables *tunables;
2390 unsigned long flags;
2395 tunables = &ni->ni_lnd_tunables->lt_tun_u.lt_o2ib;
2397 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2398 if (tunables->lnd_map_on_demand == 0) {
2399 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
2401 goto create_tx_pool;
2404 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2406 if (tunables->lnd_fmr_pool_size < *kiblnd_tunables.kib_ntx / 4) {
2407 CERROR("Can't set fmr pool size (%d) < ntx / 4(%d)\n",
2408 tunables->lnd_fmr_pool_size,
2409 *kiblnd_tunables.kib_ntx / 4);
2414 /* TX pool must be created later than FMR, see LU-2268
2416 LASSERT(net->ibn_tx_ps == NULL);
2418 /* premapping can fail if ibd_nmr > 1, so we always create
2419 * FMR pool and map-on-demand if premapping failed */
2421 net->ibn_fmr_ps = cfs_percpt_alloc(lnet_cpt_table(),
2422 sizeof(kib_fmr_poolset_t));
2423 if (net->ibn_fmr_ps == NULL) {
2424 CERROR("Failed to allocate FMR pool array\n");
2429 for (i = 0; i < ncpts; i++) {
2430 cpt = (cpts == NULL) ? i : cpts[i];
2431 rc = kiblnd_init_fmr_poolset(net->ibn_fmr_ps[cpt], cpt, ncpts,
2434 CERROR("Can't initialize FMR pool for CPT %d: %d\n",
2441 LASSERT(i == ncpts);
2444 net->ibn_tx_ps = cfs_percpt_alloc(lnet_cpt_table(),
2445 sizeof(kib_tx_poolset_t));
2446 if (net->ibn_tx_ps == NULL) {
2447 CERROR("Failed to allocate tx pool array\n");
2452 for (i = 0; i < ncpts; i++) {
2453 cpt = (cpts == NULL) ? i : cpts[i];
2454 rc = kiblnd_init_poolset(&net->ibn_tx_ps[cpt]->tps_poolset,
2456 kiblnd_tx_pool_size(ncpts),
2457 kiblnd_create_tx_pool,
2458 kiblnd_destroy_tx_pool,
2459 kiblnd_tx_init, NULL);
2461 CERROR("Can't initialize TX pool for CPT %d: %d\n",
2469 kiblnd_net_fini_pools(net);
2475 kiblnd_hdev_get_attr(kib_hca_dev_t *hdev)
2477 #ifndef HAVE_IB_DEVICE_ATTRS
2478 struct ib_device_attr *attr;
2482 /* It's safe to assume a HCA can handle a page size
2483 * matching that of the native system */
2484 hdev->ibh_page_shift = PAGE_SHIFT;
2485 hdev->ibh_page_size = 1 << PAGE_SHIFT;
2486 hdev->ibh_page_mask = ~((__u64)hdev->ibh_page_size - 1);
2488 #ifdef HAVE_IB_DEVICE_ATTRS
2489 hdev->ibh_mr_size = hdev->ibh_ibdev->attrs.max_mr_size;
2491 LIBCFS_ALLOC(attr, sizeof(*attr));
2493 CERROR("Out of memory\n");
2497 rc = ib_query_device(hdev->ibh_ibdev, attr);
2499 hdev->ibh_mr_size = attr->max_mr_size;
2501 LIBCFS_FREE(attr, sizeof(*attr));
2504 CERROR("Failed to query IB device: %d\n", rc);
2509 if (hdev->ibh_mr_size == ~0ULL) {
2510 hdev->ibh_mr_shift = 64;
2514 CERROR("Invalid mr size: %#llx\n", hdev->ibh_mr_size);
2519 kiblnd_hdev_cleanup_mrs(kib_hca_dev_t *hdev)
2521 if (hdev->ibh_mrs == NULL)
2524 ib_dereg_mr(hdev->ibh_mrs);
2526 hdev->ibh_mrs = NULL;
2530 kiblnd_hdev_destroy(kib_hca_dev_t *hdev)
2532 kiblnd_hdev_cleanup_mrs(hdev);
2534 if (hdev->ibh_pd != NULL)
2535 ib_dealloc_pd(hdev->ibh_pd);
2537 if (hdev->ibh_cmid != NULL)
2538 rdma_destroy_id(hdev->ibh_cmid);
2540 LIBCFS_FREE(hdev, sizeof(*hdev));
2544 kiblnd_hdev_setup_mrs(kib_hca_dev_t *hdev)
2548 int acflags = IB_ACCESS_LOCAL_WRITE |
2549 IB_ACCESS_REMOTE_WRITE;
2551 rc = kiblnd_hdev_get_attr(hdev);
2555 mr = ib_get_dma_mr(hdev->ibh_pd, acflags);
2557 CERROR("Failed ib_get_dma_mr: %ld\n", PTR_ERR(mr));
2558 kiblnd_hdev_cleanup_mrs(hdev);
2568 kiblnd_dummy_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event)
2574 kiblnd_dev_need_failover(kib_dev_t *dev)
2576 struct rdma_cm_id *cmid;
2577 struct sockaddr_in srcaddr;
2578 struct sockaddr_in dstaddr;
2581 if (dev->ibd_hdev == NULL || /* initializing */
2582 dev->ibd_hdev->ibh_cmid == NULL || /* listener is dead */
2583 *kiblnd_tunables.kib_dev_failover > 1) /* debugging */
2586 /* XXX: it's UGLY, but I don't have better way to find
2587 * ib-bonding HCA failover because:
2589 * a. no reliable CM event for HCA failover...
2590 * b. no OFED API to get ib_device for current net_device...
2592 * We have only two choices at this point:
2594 * a. rdma_bind_addr(), it will conflict with listener cmid
2595 * b. rdma_resolve_addr() to zero addr */
2596 cmid = kiblnd_rdma_create_id(kiblnd_dummy_callback, dev, RDMA_PS_TCP,
2600 CERROR("Failed to create cmid for failover: %d\n", rc);
2604 memset(&srcaddr, 0, sizeof(srcaddr));
2605 srcaddr.sin_family = AF_INET;
2606 srcaddr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2608 memset(&dstaddr, 0, sizeof(dstaddr));
2609 dstaddr.sin_family = AF_INET;
2610 rc = rdma_resolve_addr(cmid, (struct sockaddr *)&srcaddr,
2611 (struct sockaddr *)&dstaddr, 1);
2612 if (rc != 0 || cmid->device == NULL) {
2613 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2614 dev->ibd_ifname, &dev->ibd_ifip,
2616 rdma_destroy_id(cmid);
2620 rc = dev->ibd_hdev->ibh_ibdev != cmid->device; /* true for failover */
2621 rdma_destroy_id(cmid);
2626 kiblnd_dev_failover(kib_dev_t *dev)
2628 struct list_head zombie_tpo = LIST_HEAD_INIT(zombie_tpo);
2629 struct list_head zombie_ppo = LIST_HEAD_INIT(zombie_ppo);
2630 struct list_head zombie_fpo = LIST_HEAD_INIT(zombie_fpo);
2631 struct rdma_cm_id *cmid = NULL;
2632 kib_hca_dev_t *hdev = NULL;
2636 struct sockaddr_in addr;
2637 unsigned long flags;
2641 LASSERT (*kiblnd_tunables.kib_dev_failover > 1 ||
2642 dev->ibd_can_failover ||
2643 dev->ibd_hdev == NULL);
2645 rc = kiblnd_dev_need_failover(dev);
2649 if (dev->ibd_hdev != NULL &&
2650 dev->ibd_hdev->ibh_cmid != NULL) {
2651 /* XXX it's not good to close old listener at here,
2652 * because we can fail to create new listener.
2653 * But we have to close it now, otherwise rdma_bind_addr
2654 * will return EADDRINUSE... How crap! */
2655 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2657 cmid = dev->ibd_hdev->ibh_cmid;
2658 /* make next schedule of kiblnd_dev_need_failover()
2659 * return 1 for me */
2660 dev->ibd_hdev->ibh_cmid = NULL;
2661 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2663 rdma_destroy_id(cmid);
2666 cmid = kiblnd_rdma_create_id(kiblnd_cm_callback, dev, RDMA_PS_TCP,
2670 CERROR("Failed to create cmid for failover: %d\n", rc);
2674 memset(&addr, 0, sizeof(addr));
2675 addr.sin_family = AF_INET;
2676 addr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2677 addr.sin_port = htons(*kiblnd_tunables.kib_service);
2679 /* Bind to failover device or port */
2680 rc = rdma_bind_addr(cmid, (struct sockaddr *)&addr);
2681 if (rc != 0 || cmid->device == NULL) {
2682 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2683 dev->ibd_ifname, &dev->ibd_ifip,
2685 rdma_destroy_id(cmid);
2689 LIBCFS_ALLOC(hdev, sizeof(*hdev));
2691 CERROR("Failed to allocate kib_hca_dev\n");
2692 rdma_destroy_id(cmid);
2697 atomic_set(&hdev->ibh_ref, 1);
2698 hdev->ibh_dev = dev;
2699 hdev->ibh_cmid = cmid;
2700 hdev->ibh_ibdev = cmid->device;
2702 pd = ib_alloc_pd(cmid->device);
2705 CERROR("Can't allocate PD: %d\n", rc);
2711 rc = rdma_listen(cmid, 0);
2713 CERROR("Can't start new listener: %d\n", rc);
2717 rc = kiblnd_hdev_setup_mrs(hdev);
2719 CERROR("Can't setup device: %d\n", rc);
2723 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2725 old = dev->ibd_hdev;
2726 dev->ibd_hdev = hdev; /* take over the refcount */
2729 list_for_each_entry(net, &dev->ibd_nets, ibn_list) {
2730 cfs_cpt_for_each(i, lnet_cpt_table()) {
2731 kiblnd_fail_poolset(&net->ibn_tx_ps[i]->tps_poolset,
2734 if (net->ibn_fmr_ps != NULL)
2735 kiblnd_fail_fmr_poolset(net->ibn_fmr_ps[i],
2740 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2742 if (!list_empty(&zombie_tpo))
2743 kiblnd_destroy_pool_list(&zombie_tpo);
2744 if (!list_empty(&zombie_ppo))
2745 kiblnd_destroy_pool_list(&zombie_ppo);
2746 if (!list_empty(&zombie_fpo))
2747 kiblnd_destroy_fmr_pool_list(&zombie_fpo);
2749 kiblnd_hdev_decref(hdev);
2752 dev->ibd_failed_failover++;
2754 dev->ibd_failed_failover = 0;
2760 kiblnd_destroy_dev (kib_dev_t *dev)
2762 LASSERT (dev->ibd_nnets == 0);
2763 LASSERT(list_empty(&dev->ibd_nets));
2765 list_del(&dev->ibd_fail_list);
2766 list_del(&dev->ibd_list);
2768 if (dev->ibd_hdev != NULL)
2769 kiblnd_hdev_decref(dev->ibd_hdev);
2771 LIBCFS_FREE(dev, sizeof(*dev));
2775 kiblnd_create_dev(char *ifname)
2777 struct net_device *netdev;
2784 rc = lnet_ipif_query(ifname, &up, &ip, &netmask);
2786 CERROR("Can't query IPoIB interface %s: %d\n",
2792 CERROR("Can't query IPoIB interface %s: it's down\n", ifname);
2796 LIBCFS_ALLOC(dev, sizeof(*dev));
2800 netdev = dev_get_by_name(&init_net, ifname);
2801 if (netdev == NULL) {
2802 dev->ibd_can_failover = 0;
2804 dev->ibd_can_failover = !!(netdev->flags & IFF_MASTER);
2808 INIT_LIST_HEAD(&dev->ibd_nets);
2809 INIT_LIST_HEAD(&dev->ibd_list); /* not yet in kib_devs */
2810 INIT_LIST_HEAD(&dev->ibd_fail_list);
2812 strcpy(&dev->ibd_ifname[0], ifname);
2814 /* initialize the device */
2815 rc = kiblnd_dev_failover(dev);
2817 CERROR("Can't initialize device: %d\n", rc);
2818 LIBCFS_FREE(dev, sizeof(*dev));
2822 list_add_tail(&dev->ibd_list,
2823 &kiblnd_data.kib_devs);
2828 kiblnd_base_shutdown(void)
2830 struct kib_sched_info *sched;
2833 LASSERT(list_empty(&kiblnd_data.kib_devs));
2835 CDEBUG(D_MALLOC, "before LND base cleanup: kmem %d\n",
2836 atomic_read(&libcfs_kmemory));
2838 switch (kiblnd_data.kib_init) {
2842 case IBLND_INIT_ALL:
2843 case IBLND_INIT_DATA:
2844 LASSERT (kiblnd_data.kib_peers != NULL);
2845 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
2846 LASSERT(list_empty(&kiblnd_data.kib_peers[i]));
2848 LASSERT(list_empty(&kiblnd_data.kib_connd_zombies));
2849 LASSERT(list_empty(&kiblnd_data.kib_connd_conns));
2850 LASSERT(list_empty(&kiblnd_data.kib_reconn_list));
2851 LASSERT(list_empty(&kiblnd_data.kib_reconn_wait));
2853 /* flag threads to terminate; wake and wait for them to die */
2854 kiblnd_data.kib_shutdown = 1;
2856 /* NB: we really want to stop scheduler threads net by net
2857 * instead of the whole module, this should be improved
2858 * with dynamic configuration LNet */
2859 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds)
2860 wake_up_all(&sched->ibs_waitq);
2862 wake_up_all(&kiblnd_data.kib_connd_waitq);
2863 wake_up_all(&kiblnd_data.kib_failover_waitq);
2866 while (atomic_read(&kiblnd_data.kib_nthreads) != 0) {
2869 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET,
2870 "Waiting for %d threads to terminate\n",
2871 atomic_read(&kiblnd_data.kib_nthreads));
2872 set_current_state(TASK_UNINTERRUPTIBLE);
2873 schedule_timeout(cfs_time_seconds(1));
2878 case IBLND_INIT_NOTHING:
2882 if (kiblnd_data.kib_peers != NULL) {
2883 LIBCFS_FREE(kiblnd_data.kib_peers,
2884 sizeof(struct list_head) *
2885 kiblnd_data.kib_peer_hash_size);
2888 if (kiblnd_data.kib_scheds != NULL)
2889 cfs_percpt_free(kiblnd_data.kib_scheds);
2891 CDEBUG(D_MALLOC, "after LND base cleanup: kmem %d\n",
2892 atomic_read(&libcfs_kmemory));
2894 kiblnd_data.kib_init = IBLND_INIT_NOTHING;
2895 module_put(THIS_MODULE);
2899 kiblnd_shutdown (lnet_ni_t *ni)
2901 kib_net_t *net = ni->ni_data;
2902 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2904 unsigned long flags;
2906 LASSERT(kiblnd_data.kib_init == IBLND_INIT_ALL);
2911 CDEBUG(D_MALLOC, "before LND net cleanup: kmem %d\n",
2912 atomic_read(&libcfs_kmemory));
2914 write_lock_irqsave(g_lock, flags);
2915 net->ibn_shutdown = 1;
2916 write_unlock_irqrestore(g_lock, flags);
2918 switch (net->ibn_init) {
2922 case IBLND_INIT_ALL:
2923 /* nuke all existing peers within this net */
2924 kiblnd_del_peer(ni, LNET_NID_ANY);
2926 /* Wait for all peer state to clean up */
2928 while (atomic_read(&net->ibn_npeers) != 0) {
2931 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET,
2932 "%s: waiting for %d peers to disconnect\n",
2933 libcfs_nid2str(ni->ni_nid),
2934 atomic_read(&net->ibn_npeers));
2935 set_current_state(TASK_UNINTERRUPTIBLE);
2936 schedule_timeout(cfs_time_seconds(1));
2939 kiblnd_net_fini_pools(net);
2941 write_lock_irqsave(g_lock, flags);
2942 LASSERT(net->ibn_dev->ibd_nnets > 0);
2943 net->ibn_dev->ibd_nnets--;
2944 list_del(&net->ibn_list);
2945 write_unlock_irqrestore(g_lock, flags);
2949 case IBLND_INIT_NOTHING:
2950 LASSERT (atomic_read(&net->ibn_nconns) == 0);
2952 if (net->ibn_dev != NULL &&
2953 net->ibn_dev->ibd_nnets == 0)
2954 kiblnd_destroy_dev(net->ibn_dev);
2959 CDEBUG(D_MALLOC, "after LND net cleanup: kmem %d\n",
2960 atomic_read(&libcfs_kmemory));
2962 net->ibn_init = IBLND_INIT_NOTHING;
2965 LIBCFS_FREE(net, sizeof(*net));
2968 if (list_empty(&kiblnd_data.kib_devs))
2969 kiblnd_base_shutdown();
2974 kiblnd_base_startup(void)
2976 struct kib_sched_info *sched;
2980 LASSERT(kiblnd_data.kib_init == IBLND_INIT_NOTHING);
2982 try_module_get(THIS_MODULE);
2983 memset(&kiblnd_data, 0, sizeof(kiblnd_data)); /* zero pointers, flags etc */
2985 rwlock_init(&kiblnd_data.kib_global_lock);
2987 INIT_LIST_HEAD(&kiblnd_data.kib_devs);
2988 INIT_LIST_HEAD(&kiblnd_data.kib_failed_devs);
2990 kiblnd_data.kib_peer_hash_size = IBLND_PEER_HASH_SIZE;
2991 LIBCFS_ALLOC(kiblnd_data.kib_peers,
2992 sizeof(struct list_head) *
2993 kiblnd_data.kib_peer_hash_size);
2994 if (kiblnd_data.kib_peers == NULL)
2997 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++)
2998 INIT_LIST_HEAD(&kiblnd_data.kib_peers[i]);
3000 spin_lock_init(&kiblnd_data.kib_connd_lock);
3001 INIT_LIST_HEAD(&kiblnd_data.kib_connd_conns);
3002 INIT_LIST_HEAD(&kiblnd_data.kib_connd_zombies);
3003 INIT_LIST_HEAD(&kiblnd_data.kib_reconn_list);
3004 INIT_LIST_HEAD(&kiblnd_data.kib_reconn_wait);
3006 init_waitqueue_head(&kiblnd_data.kib_connd_waitq);
3007 init_waitqueue_head(&kiblnd_data.kib_failover_waitq);
3009 kiblnd_data.kib_scheds = cfs_percpt_alloc(lnet_cpt_table(),
3011 if (kiblnd_data.kib_scheds == NULL)
3014 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
3017 spin_lock_init(&sched->ibs_lock);
3018 INIT_LIST_HEAD(&sched->ibs_conns);
3019 init_waitqueue_head(&sched->ibs_waitq);
3021 nthrs = cfs_cpt_weight(lnet_cpt_table(), i);
3022 if (*kiblnd_tunables.kib_nscheds > 0) {
3023 nthrs = min(nthrs, *kiblnd_tunables.kib_nscheds);
3025 /* max to half of CPUs, another half is reserved for
3026 * upper layer modules */
3027 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
3030 sched->ibs_nthreads_max = nthrs;
3034 kiblnd_data.kib_error_qpa.qp_state = IB_QPS_ERR;
3036 /* lists/ptrs/locks initialised */
3037 kiblnd_data.kib_init = IBLND_INIT_DATA;
3038 /*****************************************************/
3040 rc = kiblnd_thread_start(kiblnd_connd, NULL, "kiblnd_connd");
3042 CERROR("Can't spawn o2iblnd connd: %d\n", rc);
3046 if (*kiblnd_tunables.kib_dev_failover != 0)
3047 rc = kiblnd_thread_start(kiblnd_failover_thread, NULL,
3051 CERROR("Can't spawn o2iblnd failover thread: %d\n", rc);
3055 /* flag everything initialised */
3056 kiblnd_data.kib_init = IBLND_INIT_ALL;
3057 /*****************************************************/
3062 kiblnd_base_shutdown();
3067 kiblnd_start_schedulers(struct kib_sched_info *sched)
3073 if (sched->ibs_nthreads == 0) {
3074 if (*kiblnd_tunables.kib_nscheds > 0) {
3075 nthrs = sched->ibs_nthreads_max;
3077 nthrs = cfs_cpt_weight(lnet_cpt_table(),
3079 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
3080 nthrs = min(IBLND_N_SCHED_HIGH, nthrs);
3083 LASSERT(sched->ibs_nthreads <= sched->ibs_nthreads_max);
3084 /* increase one thread if there is new interface */
3085 nthrs = (sched->ibs_nthreads < sched->ibs_nthreads_max);
3088 for (i = 0; i < nthrs; i++) {
3091 id = KIB_THREAD_ID(sched->ibs_cpt, sched->ibs_nthreads + i);
3092 snprintf(name, sizeof(name), "kiblnd_sd_%02ld_%02ld",
3093 KIB_THREAD_CPT(id), KIB_THREAD_TID(id));
3094 rc = kiblnd_thread_start(kiblnd_scheduler, (void *)id, name);
3098 CERROR("Can't spawn thread %d for scheduler[%d]: %d\n",
3099 sched->ibs_cpt, sched->ibs_nthreads + i, rc);
3103 sched->ibs_nthreads += i;
3108 kiblnd_dev_start_threads(kib_dev_t *dev, int newdev, __u32 *cpts, int ncpts)
3114 for (i = 0; i < ncpts; i++) {
3115 struct kib_sched_info *sched;
3117 cpt = (cpts == NULL) ? i : cpts[i];
3118 sched = kiblnd_data.kib_scheds[cpt];
3120 if (!newdev && sched->ibs_nthreads > 0)
3123 rc = kiblnd_start_schedulers(kiblnd_data.kib_scheds[cpt]);
3125 CERROR("Failed to start scheduler threads for %s\n",
3134 kiblnd_dev_search(char *ifname)
3136 kib_dev_t *alias = NULL;
3141 colon = strchr(ifname, ':');
3142 list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) {
3143 if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
3149 colon2 = strchr(dev->ibd_ifname, ':');
3155 if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
3167 kiblnd_startup (lnet_ni_t *ni)
3170 kib_dev_t *ibdev = NULL;
3173 unsigned long flags;
3177 LASSERT (ni->ni_lnd == &the_o2iblnd);
3179 if (kiblnd_data.kib_init == IBLND_INIT_NOTHING) {
3180 rc = kiblnd_base_startup();
3185 LIBCFS_ALLOC(net, sizeof(*net));
3190 do_gettimeofday(&tv);
3191 net->ibn_incarnation = (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
3193 kiblnd_tunables_setup(ni);
3195 if (ni->ni_interfaces[0] != NULL) {
3196 /* Use the IPoIB interface specified in 'networks=' */
3198 CLASSERT (LNET_MAX_INTERFACES > 1);
3199 if (ni->ni_interfaces[1] != NULL) {
3200 CERROR("Multiple interfaces not supported\n");
3204 ifname = ni->ni_interfaces[0];
3206 ifname = *kiblnd_tunables.kib_default_ipif;
3209 if (strlen(ifname) >= sizeof(ibdev->ibd_ifname)) {
3210 CERROR("IPoIB interface name too long: %s\n", ifname);
3214 ibdev = kiblnd_dev_search(ifname);
3216 newdev = ibdev == NULL;
3217 /* hmm...create kib_dev even for alias */
3218 if (ibdev == NULL || strcmp(&ibdev->ibd_ifname[0], ifname) != 0)
3219 ibdev = kiblnd_create_dev(ifname);
3224 net->ibn_dev = ibdev;
3225 ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid), ibdev->ibd_ifip);
3227 rc = kiblnd_dev_start_threads(ibdev, newdev,
3228 ni->ni_cpts, ni->ni_ncpts);
3232 rc = kiblnd_net_init_pools(net, ni, ni->ni_cpts, ni->ni_ncpts);
3234 CERROR("Failed to initialize NI pools: %d\n", rc);
3238 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
3240 list_add_tail(&net->ibn_list, &ibdev->ibd_nets);
3241 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
3243 net->ibn_init = IBLND_INIT_ALL;
3248 if (net != NULL && net->ibn_dev == NULL && ibdev != NULL)
3249 kiblnd_destroy_dev(ibdev);
3251 kiblnd_shutdown(ni);
3253 CDEBUG(D_NET, "kiblnd_startup failed\n");
3257 static lnd_t the_o2iblnd = {
3258 .lnd_type = O2IBLND,
3259 .lnd_startup = kiblnd_startup,
3260 .lnd_shutdown = kiblnd_shutdown,
3261 .lnd_ctl = kiblnd_ctl,
3262 .lnd_query = kiblnd_query,
3263 .lnd_send = kiblnd_send,
3264 .lnd_recv = kiblnd_recv,
3267 static void __exit ko2iblnd_exit(void)
3269 lnet_unregister_lnd(&the_o2iblnd);
3272 static int __init ko2iblnd_init(void)
3276 CLASSERT(sizeof(kib_msg_t) <= IBLND_MSG_SIZE);
3277 CLASSERT(offsetof(kib_msg_t,
3278 ibm_u.get.ibgm_rd.rd_frags[IBLND_MAX_RDMA_FRAGS]) <=
3280 CLASSERT(offsetof(kib_msg_t,
3281 ibm_u.putack.ibpam_rd.rd_frags[IBLND_MAX_RDMA_FRAGS])
3284 rc = kiblnd_tunables_init();
3288 lnet_register_lnd(&the_o2iblnd);
3293 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3294 MODULE_DESCRIPTION("OpenIB gen2 LNet Network Driver");
3295 MODULE_VERSION("2.8.0");
3296 MODULE_LICENSE("GPL");
3298 module_init(ko2iblnd_init);
3299 module_exit(ko2iblnd_exit);