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, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lnet/klnds/o2iblnd/o2iblnd.c
34 * Author: Eric Barton <eric@bartonsoftware.com>
40 static lnd_t the_o2iblnd;
42 kib_data_t kiblnd_data;
45 kiblnd_cksum (void *ptr, int nob)
51 sum = ((sum << 1) | (sum >> 31)) + *c++;
53 /* ensure I don't return 0 (== no checksum) */
54 return (sum == 0) ? 1 : sum;
58 kiblnd_msgtype2str(int type)
61 case IBLND_MSG_CONNREQ:
64 case IBLND_MSG_CONNACK:
70 case IBLND_MSG_IMMEDIATE:
73 case IBLND_MSG_PUT_REQ:
76 case IBLND_MSG_PUT_NAK:
79 case IBLND_MSG_PUT_ACK:
82 case IBLND_MSG_PUT_DONE:
85 case IBLND_MSG_GET_REQ:
88 case IBLND_MSG_GET_DONE:
97 kiblnd_msgtype2size(int type)
99 const int hdr_size = offsetof(kib_msg_t, ibm_u);
102 case IBLND_MSG_CONNREQ:
103 case IBLND_MSG_CONNACK:
104 return hdr_size + sizeof(kib_connparams_t);
109 case IBLND_MSG_IMMEDIATE:
110 return offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[0]);
112 case IBLND_MSG_PUT_REQ:
113 return hdr_size + sizeof(kib_putreq_msg_t);
115 case IBLND_MSG_PUT_ACK:
116 return hdr_size + sizeof(kib_putack_msg_t);
118 case IBLND_MSG_GET_REQ:
119 return hdr_size + sizeof(kib_get_msg_t);
121 case IBLND_MSG_PUT_NAK:
122 case IBLND_MSG_PUT_DONE:
123 case IBLND_MSG_GET_DONE:
124 return hdr_size + sizeof(kib_completion_msg_t);
131 kiblnd_unpack_rd(kib_msg_t *msg, int flip)
138 LASSERT (msg->ibm_type == IBLND_MSG_GET_REQ ||
139 msg->ibm_type == IBLND_MSG_PUT_ACK);
141 rd = msg->ibm_type == IBLND_MSG_GET_REQ ?
142 &msg->ibm_u.get.ibgm_rd :
143 &msg->ibm_u.putack.ibpam_rd;
146 __swab32s(&rd->rd_key);
147 __swab32s(&rd->rd_nfrags);
152 if (n <= 0 || n > IBLND_MAX_RDMA_FRAGS) {
153 CERROR("Bad nfrags: %d, should be 0 < n <= %d\n",
154 n, IBLND_MAX_RDMA_FRAGS);
158 nob = offsetof (kib_msg_t, ibm_u) +
159 kiblnd_rd_msg_size(rd, msg->ibm_type, n);
161 if (msg->ibm_nob < nob) {
162 CERROR("Short %s: %d(%d)\n",
163 kiblnd_msgtype2str(msg->ibm_type), msg->ibm_nob, nob);
170 for (i = 0; i < n; i++) {
171 __swab32s(&rd->rd_frags[i].rf_nob);
172 __swab64s(&rd->rd_frags[i].rf_addr);
179 kiblnd_pack_msg (lnet_ni_t *ni, kib_msg_t *msg, int version,
180 int credits, lnet_nid_t dstnid, __u64 dststamp)
182 kib_net_t *net = ni->ni_data;
184 /* CAVEAT EMPTOR! all message fields not set here should have been
185 * initialised previously. */
186 msg->ibm_magic = IBLND_MSG_MAGIC;
187 msg->ibm_version = version;
189 msg->ibm_credits = credits;
192 msg->ibm_srcnid = ni->ni_nid;
193 msg->ibm_srcstamp = net->ibn_incarnation;
194 msg->ibm_dstnid = dstnid;
195 msg->ibm_dststamp = dststamp;
197 if (*kiblnd_tunables.kib_cksum) {
198 /* NB ibm_cksum zero while computing cksum */
199 msg->ibm_cksum = kiblnd_cksum(msg, msg->ibm_nob);
204 kiblnd_unpack_msg(kib_msg_t *msg, int nob)
206 const int hdr_size = offsetof(kib_msg_t, ibm_u);
212 /* 6 bytes are enough to have received magic + version */
214 CERROR("Short message: %d\n", nob);
218 if (msg->ibm_magic == IBLND_MSG_MAGIC) {
220 } else if (msg->ibm_magic == __swab32(IBLND_MSG_MAGIC)) {
223 CERROR("Bad magic: %08x\n", msg->ibm_magic);
227 version = flip ? __swab16(msg->ibm_version) : msg->ibm_version;
228 if (version != IBLND_MSG_VERSION &&
229 version != IBLND_MSG_VERSION_1) {
230 CERROR("Bad version: %x\n", version);
234 if (nob < hdr_size) {
235 CERROR("Short message: %d\n", nob);
239 msg_nob = flip ? __swab32(msg->ibm_nob) : msg->ibm_nob;
241 CERROR("Short message: got %d, wanted %d\n", nob, msg_nob);
245 /* checksum must be computed with ibm_cksum zero and BEFORE anything
247 msg_cksum = flip ? __swab32(msg->ibm_cksum) : msg->ibm_cksum;
249 if (msg_cksum != 0 &&
250 msg_cksum != kiblnd_cksum(msg, msg_nob)) {
251 CERROR("Bad checksum\n");
255 msg->ibm_cksum = msg_cksum;
258 /* leave magic unflipped as a clue to peer endianness */
259 msg->ibm_version = version;
260 CLASSERT (sizeof(msg->ibm_type) == 1);
261 CLASSERT (sizeof(msg->ibm_credits) == 1);
262 msg->ibm_nob = msg_nob;
263 __swab64s(&msg->ibm_srcnid);
264 __swab64s(&msg->ibm_srcstamp);
265 __swab64s(&msg->ibm_dstnid);
266 __swab64s(&msg->ibm_dststamp);
269 if (msg->ibm_srcnid == LNET_NID_ANY) {
270 CERROR("Bad src nid: %s\n", libcfs_nid2str(msg->ibm_srcnid));
274 if (msg_nob < kiblnd_msgtype2size(msg->ibm_type)) {
275 CERROR("Short %s: %d(%d)\n", kiblnd_msgtype2str(msg->ibm_type),
276 msg_nob, kiblnd_msgtype2size(msg->ibm_type));
280 switch (msg->ibm_type) {
282 CERROR("Unknown message type %x\n", msg->ibm_type);
286 case IBLND_MSG_IMMEDIATE:
287 case IBLND_MSG_PUT_REQ:
290 case IBLND_MSG_PUT_ACK:
291 case IBLND_MSG_GET_REQ:
292 if (kiblnd_unpack_rd(msg, flip))
296 case IBLND_MSG_PUT_NAK:
297 case IBLND_MSG_PUT_DONE:
298 case IBLND_MSG_GET_DONE:
300 __swab32s(&msg->ibm_u.completion.ibcm_status);
303 case IBLND_MSG_CONNREQ:
304 case IBLND_MSG_CONNACK:
306 __swab16s(&msg->ibm_u.connparams.ibcp_queue_depth);
307 __swab16s(&msg->ibm_u.connparams.ibcp_max_frags);
308 __swab32s(&msg->ibm_u.connparams.ibcp_max_msg_size);
316 kiblnd_create_peer(lnet_ni_t *ni, kib_peer_t **peerp, lnet_nid_t nid)
319 kib_net_t *net = ni->ni_data;
320 int cpt = lnet_cpt_of_nid(nid, ni);
323 LASSERT(net != NULL);
324 LASSERT(nid != LNET_NID_ANY);
326 LIBCFS_CPT_ALLOC(peer, lnet_cpt_table(), cpt, sizeof(*peer));
328 CERROR("Cannot allocate peer\n");
335 peer->ibp_last_alive = 0;
336 peer->ibp_max_frags = kiblnd_cfg_rdma_frags(peer->ibp_ni);
337 peer->ibp_queue_depth = ni->ni_net->net_tunables.lct_peer_tx_credits;
338 atomic_set(&peer->ibp_refcount, 1); /* 1 ref for caller */
340 INIT_LIST_HEAD(&peer->ibp_list); /* not in the peer table yet */
341 INIT_LIST_HEAD(&peer->ibp_conns);
342 INIT_LIST_HEAD(&peer->ibp_tx_queue);
344 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
346 /* always called with a ref on ni, which prevents ni being shutdown */
347 LASSERT(net->ibn_shutdown == 0);
349 /* npeers only grows with the global lock held */
350 atomic_inc(&net->ibn_npeers);
352 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
359 kiblnd_destroy_peer (kib_peer_t *peer)
361 kib_net_t *net = peer->ibp_ni->ni_data;
363 LASSERT(net != NULL);
364 LASSERT (atomic_read(&peer->ibp_refcount) == 0);
365 LASSERT(!kiblnd_peer_active(peer));
366 LASSERT(kiblnd_peer_idle(peer));
367 LASSERT(list_empty(&peer->ibp_tx_queue));
369 LIBCFS_FREE(peer, sizeof(*peer));
371 /* NB a peer's connections keep a reference on their peer until
372 * they are destroyed, so we can be assured that _all_ state to do
373 * with this peer has been cleaned up when its refcount drops to
375 atomic_dec(&net->ibn_npeers);
379 kiblnd_find_peer_locked (lnet_nid_t nid)
381 /* the caller is responsible for accounting the additional reference
382 * that this creates */
383 struct list_head *peer_list = kiblnd_nid2peerlist(nid);
384 struct list_head *tmp;
387 list_for_each(tmp, peer_list) {
389 peer = list_entry(tmp, kib_peer_t, ibp_list);
390 LASSERT(!kiblnd_peer_idle(peer));
392 if (peer->ibp_nid != nid)
395 CDEBUG(D_NET, "got peer [%p] -> %s (%d) version: %x\n",
396 peer, libcfs_nid2str(nid),
397 atomic_read(&peer->ibp_refcount),
405 kiblnd_unlink_peer_locked (kib_peer_t *peer)
407 LASSERT(list_empty(&peer->ibp_conns));
409 LASSERT (kiblnd_peer_active(peer));
410 list_del_init(&peer->ibp_list);
411 /* lose peerlist's ref */
412 kiblnd_peer_decref(peer);
416 kiblnd_get_peer_info(lnet_ni_t *ni, int index,
417 lnet_nid_t *nidp, int *count)
420 struct list_head *ptmp;
424 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
426 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
428 list_for_each(ptmp, &kiblnd_data.kib_peers[i]) {
430 peer = list_entry(ptmp, kib_peer_t, ibp_list);
431 LASSERT(!kiblnd_peer_idle(peer));
433 if (peer->ibp_ni != ni)
439 *nidp = peer->ibp_nid;
440 *count = atomic_read(&peer->ibp_refcount);
442 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
448 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
453 kiblnd_del_peer_locked (kib_peer_t *peer)
455 struct list_head *ctmp;
456 struct list_head *cnxt;
459 if (list_empty(&peer->ibp_conns)) {
460 kiblnd_unlink_peer_locked(peer);
462 list_for_each_safe(ctmp, cnxt, &peer->ibp_conns) {
463 conn = list_entry(ctmp, kib_conn_t, ibc_list);
465 kiblnd_close_conn_locked(conn, 0);
467 /* NB closing peer's last conn unlinked it. */
469 /* NB peer now unlinked; might even be freed if the peer table had the
474 kiblnd_del_peer (lnet_ni_t *ni, lnet_nid_t nid)
476 struct list_head zombies = LIST_HEAD_INIT(zombies);
477 struct list_head *ptmp;
478 struct list_head *pnxt;
486 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
488 if (nid != LNET_NID_ANY) {
489 lo = hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
492 hi = kiblnd_data.kib_peer_hash_size - 1;
495 for (i = lo; i <= hi; i++) {
496 list_for_each_safe(ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
497 peer = list_entry(ptmp, kib_peer_t, ibp_list);
498 LASSERT(!kiblnd_peer_idle(peer));
500 if (peer->ibp_ni != ni)
503 if (!(nid == LNET_NID_ANY || peer->ibp_nid == nid))
506 if (!list_empty(&peer->ibp_tx_queue)) {
507 LASSERT(list_empty(&peer->ibp_conns));
509 list_splice_init(&peer->ibp_tx_queue,
513 kiblnd_del_peer_locked(peer);
514 rc = 0; /* matched something */
518 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
520 kiblnd_txlist_done(ni, &zombies, -EIO);
526 kiblnd_get_conn_by_idx(lnet_ni_t *ni, int index)
529 struct list_head *ptmp;
531 struct list_head *ctmp;
535 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
537 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
538 list_for_each(ptmp, &kiblnd_data.kib_peers[i]) {
540 peer = list_entry(ptmp, kib_peer_t, ibp_list);
541 LASSERT(!kiblnd_peer_idle(peer));
543 if (peer->ibp_ni != ni)
546 list_for_each(ctmp, &peer->ibp_conns) {
550 conn = list_entry(ctmp, kib_conn_t, ibc_list);
551 kiblnd_conn_addref(conn);
552 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
559 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
564 kiblnd_debug_rx (kib_rx_t *rx)
566 CDEBUG(D_CONSOLE, " %p status %d msg_type %x cred %d\n",
567 rx, rx->rx_status, rx->rx_msg->ibm_type,
568 rx->rx_msg->ibm_credits);
572 kiblnd_debug_tx (kib_tx_t *tx)
574 CDEBUG(D_CONSOLE, " %p snd %d q %d w %d rc %d dl %lx "
575 "cookie %#llx msg %s%s type %x cred %d\n",
576 tx, tx->tx_sending, tx->tx_queued, tx->tx_waiting,
577 tx->tx_status, tx->tx_deadline, tx->tx_cookie,
578 tx->tx_lntmsg[0] == NULL ? "-" : "!",
579 tx->tx_lntmsg[1] == NULL ? "-" : "!",
580 tx->tx_msg->ibm_type, tx->tx_msg->ibm_credits);
584 kiblnd_debug_conn (kib_conn_t *conn)
586 struct list_head *tmp;
589 spin_lock(&conn->ibc_lock);
591 CDEBUG(D_CONSOLE, "conn[%d] %p [version %x] -> %s:\n",
592 atomic_read(&conn->ibc_refcount), conn,
593 conn->ibc_version, libcfs_nid2str(conn->ibc_peer->ibp_nid));
594 CDEBUG(D_CONSOLE, " state %d nposted %d/%d cred %d o_cred %d "
595 " r_cred %d\n", conn->ibc_state, conn->ibc_noops_posted,
596 conn->ibc_nsends_posted, conn->ibc_credits,
597 conn->ibc_outstanding_credits, conn->ibc_reserved_credits);
598 CDEBUG(D_CONSOLE, " comms_err %d\n", conn->ibc_comms_error);
600 CDEBUG(D_CONSOLE, " early_rxs:\n");
601 list_for_each(tmp, &conn->ibc_early_rxs)
602 kiblnd_debug_rx(list_entry(tmp, kib_rx_t, rx_list));
604 CDEBUG(D_CONSOLE, " tx_noops:\n");
605 list_for_each(tmp, &conn->ibc_tx_noops)
606 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
608 CDEBUG(D_CONSOLE, " tx_queue_nocred:\n");
609 list_for_each(tmp, &conn->ibc_tx_queue_nocred)
610 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
612 CDEBUG(D_CONSOLE, " tx_queue_rsrvd:\n");
613 list_for_each(tmp, &conn->ibc_tx_queue_rsrvd)
614 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
616 CDEBUG(D_CONSOLE, " tx_queue:\n");
617 list_for_each(tmp, &conn->ibc_tx_queue)
618 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
620 CDEBUG(D_CONSOLE, " active_txs:\n");
621 list_for_each(tmp, &conn->ibc_active_txs)
622 kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list));
624 CDEBUG(D_CONSOLE, " rxs:\n");
625 for (i = 0; i < IBLND_RX_MSGS(conn); i++)
626 kiblnd_debug_rx(&conn->ibc_rxs[i]);
628 spin_unlock(&conn->ibc_lock);
632 kiblnd_translate_mtu(int value)
653 kiblnd_setup_mtu_locked(struct rdma_cm_id *cmid)
657 /* XXX There is no path record for iWARP, set by netdev->change_mtu? */
658 if (cmid->route.path_rec == NULL)
661 mtu = kiblnd_translate_mtu(*kiblnd_tunables.kib_ib_mtu);
664 cmid->route.path_rec->mtu = mtu;
668 kiblnd_get_completion_vector(kib_conn_t *conn, int cpt)
676 vectors = conn->ibc_cmid->device->num_comp_vectors;
680 mask = cfs_cpt_cpumask(lnet_cpt_table(), cpt);
682 /* hash NID to CPU id in this partition... */
683 ibp_nid = conn->ibc_peer->ibp_nid;
684 off = do_div(ibp_nid, cpumask_weight(mask));
685 for_each_cpu(i, mask) {
695 kiblnd_create_conn(kib_peer_t *peer, struct rdma_cm_id *cmid,
696 int state, int version)
699 * If the new conn is created successfully it takes over the caller's
700 * ref on 'peer'. It also "owns" 'cmid' and destroys it when it itself
701 * is destroyed. On failure, the caller's ref on 'peer' remains and
702 * she must dispose of 'cmid'. (Actually I'd block forever if I tried
703 * to destroy 'cmid' here since I'm called from the CM which still has
704 * its ref on 'cmid'). */
705 rwlock_t *glock = &kiblnd_data.kib_global_lock;
706 kib_net_t *net = peer->ibp_ni->ni_data;
708 struct ib_qp_init_attr *init_qp_attr;
709 struct kib_sched_info *sched;
710 #ifdef HAVE_IB_CQ_INIT_ATTR
711 struct ib_cq_init_attr cq_attr = {};
720 LASSERT(net != NULL);
721 LASSERT(!in_interrupt());
725 cpt = lnet_cpt_of_nid(peer->ibp_nid, peer->ibp_ni);
726 sched = kiblnd_data.kib_scheds[cpt];
728 LASSERT(sched->ibs_nthreads > 0);
730 LIBCFS_CPT_ALLOC(init_qp_attr, lnet_cpt_table(), cpt,
731 sizeof(*init_qp_attr));
732 if (init_qp_attr == NULL) {
733 CERROR("Can't allocate qp_attr for %s\n",
734 libcfs_nid2str(peer->ibp_nid));
738 LIBCFS_CPT_ALLOC(conn, lnet_cpt_table(), cpt, sizeof(*conn));
740 CERROR("Can't allocate connection for %s\n",
741 libcfs_nid2str(peer->ibp_nid));
745 conn->ibc_state = IBLND_CONN_INIT;
746 conn->ibc_version = version;
747 conn->ibc_peer = peer; /* I take the caller's ref */
748 cmid->context = conn; /* for future CM callbacks */
749 conn->ibc_cmid = cmid;
750 conn->ibc_max_frags = peer->ibp_max_frags;
751 conn->ibc_queue_depth = peer->ibp_queue_depth;
753 INIT_LIST_HEAD(&conn->ibc_early_rxs);
754 INIT_LIST_HEAD(&conn->ibc_tx_noops);
755 INIT_LIST_HEAD(&conn->ibc_tx_queue);
756 INIT_LIST_HEAD(&conn->ibc_tx_queue_rsrvd);
757 INIT_LIST_HEAD(&conn->ibc_tx_queue_nocred);
758 INIT_LIST_HEAD(&conn->ibc_active_txs);
759 spin_lock_init(&conn->ibc_lock);
761 LIBCFS_CPT_ALLOC(conn->ibc_connvars, lnet_cpt_table(), cpt,
762 sizeof(*conn->ibc_connvars));
763 if (conn->ibc_connvars == NULL) {
764 CERROR("Can't allocate in-progress connection state\n");
768 write_lock_irqsave(glock, flags);
769 if (dev->ibd_failover) {
770 write_unlock_irqrestore(glock, flags);
771 CERROR("%s: failover in progress\n", dev->ibd_ifname);
775 if (dev->ibd_hdev->ibh_ibdev != cmid->device) {
776 /* wakeup failover thread and teardown connection */
777 if (kiblnd_dev_can_failover(dev)) {
778 list_add_tail(&dev->ibd_fail_list,
779 &kiblnd_data.kib_failed_devs);
780 wake_up(&kiblnd_data.kib_failover_waitq);
783 write_unlock_irqrestore(glock, flags);
784 CERROR("cmid HCA(%s), kib_dev(%s) need failover\n",
785 cmid->device->name, dev->ibd_ifname);
789 kiblnd_hdev_addref_locked(dev->ibd_hdev);
790 conn->ibc_hdev = dev->ibd_hdev;
792 kiblnd_setup_mtu_locked(cmid);
794 write_unlock_irqrestore(glock, flags);
796 LIBCFS_CPT_ALLOC(conn->ibc_rxs, lnet_cpt_table(), cpt,
797 IBLND_RX_MSGS(conn) * sizeof(kib_rx_t));
798 if (conn->ibc_rxs == NULL) {
799 CERROR("Cannot allocate RX buffers\n");
803 rc = kiblnd_alloc_pages(&conn->ibc_rx_pages, cpt,
804 IBLND_RX_MSG_PAGES(conn));
808 kiblnd_map_rx_descs(conn);
810 #ifdef HAVE_IB_CQ_INIT_ATTR
811 cq_attr.cqe = IBLND_CQ_ENTRIES(conn);
812 cq_attr.comp_vector = kiblnd_get_completion_vector(conn, cpt);
813 cq = ib_create_cq(cmid->device,
814 kiblnd_cq_completion, kiblnd_cq_event, conn,
817 cq = ib_create_cq(cmid->device,
818 kiblnd_cq_completion, kiblnd_cq_event, conn,
819 IBLND_CQ_ENTRIES(conn),
820 kiblnd_get_completion_vector(conn, cpt));
823 CERROR("Failed to create CQ with %d CQEs: %ld\n",
824 IBLND_CQ_ENTRIES(conn), PTR_ERR(cq));
830 rc = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
832 CERROR("Can't request completion notification: %d\n", rc);
836 init_qp_attr->event_handler = kiblnd_qp_event;
837 init_qp_attr->qp_context = conn;
838 init_qp_attr->cap.max_send_wr = IBLND_SEND_WRS(conn);
839 init_qp_attr->cap.max_recv_wr = IBLND_RECV_WRS(conn);
840 init_qp_attr->cap.max_send_sge = 1;
841 init_qp_attr->cap.max_recv_sge = 1;
842 init_qp_attr->sq_sig_type = IB_SIGNAL_REQ_WR;
843 init_qp_attr->qp_type = IB_QPT_RC;
844 init_qp_attr->send_cq = cq;
845 init_qp_attr->recv_cq = cq;
847 conn->ibc_sched = sched;
850 rc = rdma_create_qp(cmid, conn->ibc_hdev->ibh_pd, init_qp_attr);
851 if (!rc || init_qp_attr->cap.max_send_wr < 16)
854 init_qp_attr->cap.max_send_wr -= init_qp_attr->cap.max_send_wr / 4;
858 CERROR("Can't create QP: %d, send_wr: %d, recv_wr: %d\n",
859 rc, init_qp_attr->cap.max_send_wr,
860 init_qp_attr->cap.max_recv_wr);
864 if (init_qp_attr->cap.max_send_wr != IBLND_SEND_WRS(conn))
865 CDEBUG(D_NET, "original send wr %d, created with %d\n",
866 IBLND_SEND_WRS(conn), init_qp_attr->cap.max_send_wr);
868 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
870 /* 1 ref for caller and each rxmsg */
871 atomic_set(&conn->ibc_refcount, 1 + IBLND_RX_MSGS(conn));
872 conn->ibc_nrx = IBLND_RX_MSGS(conn);
875 for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
876 rc = kiblnd_post_rx(&conn->ibc_rxs[i], IBLND_POSTRX_NO_CREDIT);
878 CERROR("Can't post rxmsg: %d\n", rc);
880 /* Make posted receives complete */
881 kiblnd_abort_receives(conn);
883 /* correct # of posted buffers
884 * NB locking needed now I'm racing with completion */
885 spin_lock_irqsave(&sched->ibs_lock, flags);
886 conn->ibc_nrx -= IBLND_RX_MSGS(conn) - i;
887 spin_unlock_irqrestore(&sched->ibs_lock, flags);
889 /* cmid will be destroyed by CM(ofed) after cm_callback
890 * returned, so we can't refer it anymore
891 * (by kiblnd_connd()->kiblnd_destroy_conn) */
892 rdma_destroy_qp(conn->ibc_cmid);
893 conn->ibc_cmid = NULL;
895 /* Drop my own and unused rxbuffer refcounts */
896 while (i++ <= IBLND_RX_MSGS(conn))
897 kiblnd_conn_decref(conn);
903 /* Init successful! */
904 LASSERT (state == IBLND_CONN_ACTIVE_CONNECT ||
905 state == IBLND_CONN_PASSIVE_WAIT);
906 conn->ibc_state = state;
909 atomic_inc(&net->ibn_nconns);
913 kiblnd_destroy_conn(conn, true);
915 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
921 kiblnd_destroy_conn(kib_conn_t *conn, bool free_conn)
923 struct rdma_cm_id *cmid = conn->ibc_cmid;
924 kib_peer_t *peer = conn->ibc_peer;
927 LASSERT (!in_interrupt());
928 LASSERT (atomic_read(&conn->ibc_refcount) == 0);
929 LASSERT(list_empty(&conn->ibc_early_rxs));
930 LASSERT(list_empty(&conn->ibc_tx_noops));
931 LASSERT(list_empty(&conn->ibc_tx_queue));
932 LASSERT(list_empty(&conn->ibc_tx_queue_rsrvd));
933 LASSERT(list_empty(&conn->ibc_tx_queue_nocred));
934 LASSERT(list_empty(&conn->ibc_active_txs));
935 LASSERT (conn->ibc_noops_posted == 0);
936 LASSERT (conn->ibc_nsends_posted == 0);
938 switch (conn->ibc_state) {
940 /* conn must be completely disengaged from the network */
943 case IBLND_CONN_DISCONNECTED:
944 /* connvars should have been freed already */
945 LASSERT (conn->ibc_connvars == NULL);
948 case IBLND_CONN_INIT:
952 /* conn->ibc_cmid might be destroyed by CM already */
953 if (cmid != NULL && cmid->qp != NULL)
954 rdma_destroy_qp(cmid);
956 if (conn->ibc_cq != NULL) {
957 rc = ib_destroy_cq(conn->ibc_cq);
959 CWARN("Error destroying CQ: %d\n", rc);
962 if (conn->ibc_rx_pages != NULL)
963 kiblnd_unmap_rx_descs(conn);
965 if (conn->ibc_rxs != NULL) {
966 LIBCFS_FREE(conn->ibc_rxs,
967 IBLND_RX_MSGS(conn) * sizeof(kib_rx_t));
970 if (conn->ibc_connvars != NULL)
971 LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
973 if (conn->ibc_hdev != NULL)
974 kiblnd_hdev_decref(conn->ibc_hdev);
976 /* See CAVEAT EMPTOR above in kiblnd_create_conn */
977 if (conn->ibc_state != IBLND_CONN_INIT) {
978 kib_net_t *net = peer->ibp_ni->ni_data;
980 kiblnd_peer_decref(peer);
981 rdma_destroy_id(cmid);
982 atomic_dec(&net->ibn_nconns);
986 LIBCFS_FREE(conn, sizeof(*conn));
990 kiblnd_close_peer_conns_locked(kib_peer_t *peer, int why)
993 struct list_head *ctmp;
994 struct list_head *cnxt;
997 list_for_each_safe(ctmp, cnxt, &peer->ibp_conns) {
998 conn = list_entry(ctmp, kib_conn_t, ibc_list);
1000 CDEBUG(D_NET, "Closing conn -> %s, "
1001 "version: %x, reason: %d\n",
1002 libcfs_nid2str(peer->ibp_nid),
1003 conn->ibc_version, why);
1005 kiblnd_close_conn_locked(conn, why);
1013 kiblnd_close_stale_conns_locked(kib_peer_t *peer,
1014 int version, __u64 incarnation)
1017 struct list_head *ctmp;
1018 struct list_head *cnxt;
1021 list_for_each_safe(ctmp, cnxt, &peer->ibp_conns) {
1022 conn = list_entry(ctmp, kib_conn_t, ibc_list);
1024 if (conn->ibc_version == version &&
1025 conn->ibc_incarnation == incarnation)
1028 CDEBUG(D_NET, "Closing stale conn -> %s version: %x, "
1029 "incarnation:%#llx(%x, %#llx)\n",
1030 libcfs_nid2str(peer->ibp_nid),
1031 conn->ibc_version, conn->ibc_incarnation,
1032 version, incarnation);
1034 kiblnd_close_conn_locked(conn, -ESTALE);
1042 kiblnd_close_matching_conns(lnet_ni_t *ni, lnet_nid_t nid)
1045 struct list_head *ptmp;
1046 struct list_head *pnxt;
1050 unsigned long flags;
1053 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1055 if (nid != LNET_NID_ANY)
1056 lo = hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
1059 hi = kiblnd_data.kib_peer_hash_size - 1;
1062 for (i = lo; i <= hi; i++) {
1063 list_for_each_safe(ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
1065 peer = list_entry(ptmp, kib_peer_t, ibp_list);
1066 LASSERT(!kiblnd_peer_idle(peer));
1068 if (peer->ibp_ni != ni)
1071 if (!(nid == LNET_NID_ANY || nid == peer->ibp_nid))
1074 count += kiblnd_close_peer_conns_locked(peer, 0);
1078 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1080 /* wildcards always succeed */
1081 if (nid == LNET_NID_ANY)
1084 return (count == 0) ? -ENOENT : 0;
1088 kiblnd_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg)
1090 struct libcfs_ioctl_data *data = arg;
1094 case IOC_LIBCFS_GET_PEER: {
1098 rc = kiblnd_get_peer_info(ni, data->ioc_count,
1100 data->ioc_nid = nid;
1101 data->ioc_count = count;
1105 case IOC_LIBCFS_DEL_PEER: {
1106 rc = kiblnd_del_peer(ni, data->ioc_nid);
1109 case IOC_LIBCFS_GET_CONN: {
1113 conn = kiblnd_get_conn_by_idx(ni, data->ioc_count);
1119 LASSERT (conn->ibc_cmid != NULL);
1120 data->ioc_nid = conn->ibc_peer->ibp_nid;
1121 if (conn->ibc_cmid->route.path_rec == NULL)
1122 data->ioc_u32[0] = 0; /* iWarp has no path MTU */
1125 ib_mtu_enum_to_int(conn->ibc_cmid->route.path_rec->mtu);
1126 kiblnd_conn_decref(conn);
1129 case IOC_LIBCFS_CLOSE_CONNECTION: {
1130 rc = kiblnd_close_matching_conns(ni, data->ioc_nid);
1142 kiblnd_query(lnet_ni_t *ni, lnet_nid_t nid, cfs_time_t *when)
1144 cfs_time_t last_alive = 0;
1145 cfs_time_t now = cfs_time_current();
1146 rwlock_t *glock = &kiblnd_data.kib_global_lock;
1148 unsigned long flags;
1150 read_lock_irqsave(glock, flags);
1152 peer = kiblnd_find_peer_locked(nid);
1154 last_alive = peer->ibp_last_alive;
1156 read_unlock_irqrestore(glock, flags);
1158 if (last_alive != 0)
1161 /* peer is not persistent in hash, trigger peer creation
1162 * and connection establishment with a NULL tx */
1164 kiblnd_launch_tx(ni, NULL, nid);
1166 CDEBUG(D_NET, "Peer %s %p, alive %ld secs ago\n",
1167 libcfs_nid2str(nid), peer,
1168 last_alive ? cfs_duration_sec(now - last_alive) : -1);
1173 kiblnd_free_pages(kib_pages_t *p)
1175 int npages = p->ibp_npages;
1178 for (i = 0; i < npages; i++) {
1179 if (p->ibp_pages[i] != NULL)
1180 __free_page(p->ibp_pages[i]);
1183 LIBCFS_FREE(p, offsetof(kib_pages_t, ibp_pages[npages]));
1187 kiblnd_alloc_pages(kib_pages_t **pp, int cpt, int npages)
1192 LIBCFS_CPT_ALLOC(p, lnet_cpt_table(), cpt,
1193 offsetof(kib_pages_t, ibp_pages[npages]));
1195 CERROR("Can't allocate descriptor for %d pages\n", npages);
1199 memset(p, 0, offsetof(kib_pages_t, ibp_pages[npages]));
1200 p->ibp_npages = npages;
1202 for (i = 0; i < npages; i++) {
1203 p->ibp_pages[i] = cfs_page_cpt_alloc(lnet_cpt_table(), cpt,
1205 if (p->ibp_pages[i] == NULL) {
1206 CERROR("Can't allocate page %d of %d\n", i, npages);
1207 kiblnd_free_pages(p);
1217 kiblnd_unmap_rx_descs(kib_conn_t *conn)
1222 LASSERT (conn->ibc_rxs != NULL);
1223 LASSERT (conn->ibc_hdev != NULL);
1225 for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
1226 rx = &conn->ibc_rxs[i];
1228 LASSERT(rx->rx_nob >= 0); /* not posted */
1230 kiblnd_dma_unmap_single(conn->ibc_hdev->ibh_ibdev,
1231 KIBLND_UNMAP_ADDR(rx, rx_msgunmap,
1233 IBLND_MSG_SIZE, DMA_FROM_DEVICE);
1236 kiblnd_free_pages(conn->ibc_rx_pages);
1238 conn->ibc_rx_pages = NULL;
1242 kiblnd_map_rx_descs(kib_conn_t *conn)
1250 for (pg_off = ipg = i = 0; i < IBLND_RX_MSGS(conn); i++) {
1251 pg = conn->ibc_rx_pages->ibp_pages[ipg];
1252 rx = &conn->ibc_rxs[i];
1255 rx->rx_msg = (kib_msg_t *)(((char *)page_address(pg)) + pg_off);
1258 kiblnd_dma_map_single(conn->ibc_hdev->ibh_ibdev,
1259 rx->rx_msg, IBLND_MSG_SIZE,
1261 LASSERT(!kiblnd_dma_mapping_error(conn->ibc_hdev->ibh_ibdev,
1263 KIBLND_UNMAP_ADDR_SET(rx, rx_msgunmap, rx->rx_msgaddr);
1265 CDEBUG(D_NET, "rx %d: %p %#llx(%#llx)\n",
1266 i, rx->rx_msg, rx->rx_msgaddr,
1267 (__u64)(page_to_phys(pg) + pg_off));
1269 pg_off += IBLND_MSG_SIZE;
1270 LASSERT(pg_off <= PAGE_SIZE);
1272 if (pg_off == PAGE_SIZE) {
1275 LASSERT(ipg <= IBLND_RX_MSG_PAGES(conn));
1281 kiblnd_unmap_tx_pool(kib_tx_pool_t *tpo)
1283 kib_hca_dev_t *hdev = tpo->tpo_hdev;
1287 LASSERT (tpo->tpo_pool.po_allocated == 0);
1292 for (i = 0; i < tpo->tpo_pool.po_size; i++) {
1293 tx = &tpo->tpo_tx_descs[i];
1294 kiblnd_dma_unmap_single(hdev->ibh_ibdev,
1295 KIBLND_UNMAP_ADDR(tx, tx_msgunmap,
1297 IBLND_MSG_SIZE, DMA_TO_DEVICE);
1300 kiblnd_hdev_decref(hdev);
1301 tpo->tpo_hdev = NULL;
1304 static kib_hca_dev_t *
1305 kiblnd_current_hdev(kib_dev_t *dev)
1307 kib_hca_dev_t *hdev;
1308 unsigned long flags;
1311 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1312 while (dev->ibd_failover) {
1313 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1315 CDEBUG(D_NET, "%s: Wait for failover\n",
1317 set_current_state(TASK_INTERRUPTIBLE);
1318 schedule_timeout(cfs_time_seconds(1) / 100);
1320 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1323 kiblnd_hdev_addref_locked(dev->ibd_hdev);
1324 hdev = dev->ibd_hdev;
1326 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1332 kiblnd_map_tx_pool(kib_tx_pool_t *tpo)
1334 kib_pages_t *txpgs = tpo->tpo_tx_pages;
1335 kib_pool_t *pool = &tpo->tpo_pool;
1336 kib_net_t *net = pool->po_owner->ps_net;
1344 LASSERT (net != NULL);
1348 /* pre-mapped messages are not bigger than 1 page */
1349 CLASSERT (IBLND_MSG_SIZE <= PAGE_SIZE);
1351 /* No fancy arithmetic when we do the buffer calculations */
1352 CLASSERT (PAGE_SIZE % IBLND_MSG_SIZE == 0);
1354 tpo->tpo_hdev = kiblnd_current_hdev(dev);
1356 for (ipage = page_offset = i = 0; i < pool->po_size; i++) {
1357 page = txpgs->ibp_pages[ipage];
1358 tx = &tpo->tpo_tx_descs[i];
1360 tx->tx_msg = (kib_msg_t *)(((char *)page_address(page)) +
1363 tx->tx_msgaddr = kiblnd_dma_map_single(tpo->tpo_hdev->ibh_ibdev,
1367 LASSERT(!kiblnd_dma_mapping_error(tpo->tpo_hdev->ibh_ibdev,
1369 KIBLND_UNMAP_ADDR_SET(tx, tx_msgunmap, tx->tx_msgaddr);
1371 list_add(&tx->tx_list, &pool->po_free_list);
1373 page_offset += IBLND_MSG_SIZE;
1374 LASSERT(page_offset <= PAGE_SIZE);
1376 if (page_offset == PAGE_SIZE) {
1379 LASSERT(ipage <= txpgs->ibp_npages);
1385 kiblnd_find_rd_dma_mr(struct lnet_ni *ni, kib_rdma_desc_t *rd,
1386 int negotiated_nfrags)
1388 kib_net_t *net = ni->ni_data;
1389 kib_hca_dev_t *hdev = net->ibn_dev->ibd_hdev;
1390 struct lnet_ioctl_config_o2iblnd_tunables *tunables;
1394 tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib;
1395 mod = tunables->lnd_map_on_demand;
1396 nfrags = (negotiated_nfrags != -1) ? negotiated_nfrags : mod;
1398 LASSERT(hdev->ibh_mrs != NULL);
1400 if (mod > 0 && nfrags <= rd->rd_nfrags)
1403 return hdev->ibh_mrs;
1407 kiblnd_destroy_fmr_pool(kib_fmr_pool_t *fpo)
1409 LASSERT(fpo->fpo_map_count == 0);
1411 if (fpo->fpo_is_fmr) {
1412 if (fpo->fmr.fpo_fmr_pool)
1413 ib_destroy_fmr_pool(fpo->fmr.fpo_fmr_pool);
1415 struct kib_fast_reg_descriptor *frd, *tmp;
1418 list_for_each_entry_safe(frd, tmp, &fpo->fast_reg.fpo_pool_list,
1420 list_del(&frd->frd_list);
1421 #ifndef HAVE_IB_MAP_MR_SG
1422 ib_free_fast_reg_page_list(frd->frd_frpl);
1424 ib_dereg_mr(frd->frd_mr);
1425 LIBCFS_FREE(frd, sizeof(*frd));
1428 if (i < fpo->fast_reg.fpo_pool_size)
1429 CERROR("FastReg pool still has %d regions registered\n",
1430 fpo->fast_reg.fpo_pool_size - i);
1434 kiblnd_hdev_decref(fpo->fpo_hdev);
1436 LIBCFS_FREE(fpo, sizeof(*fpo));
1440 kiblnd_destroy_fmr_pool_list(struct list_head *head)
1442 kib_fmr_pool_t *fpo, *tmp;
1444 list_for_each_entry_safe(fpo, tmp, head, fpo_list) {
1445 list_del(&fpo->fpo_list);
1446 kiblnd_destroy_fmr_pool(fpo);
1451 kiblnd_fmr_pool_size(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
1454 int size = tunables->lnd_fmr_pool_size / ncpts;
1456 return max(IBLND_FMR_POOL, size);
1460 kiblnd_fmr_flush_trigger(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
1463 int size = tunables->lnd_fmr_flush_trigger / ncpts;
1465 return max(IBLND_FMR_POOL_FLUSH, size);
1468 static int kiblnd_alloc_fmr_pool(kib_fmr_poolset_t *fps, kib_fmr_pool_t *fpo)
1470 struct ib_fmr_pool_param param = {
1471 .max_pages_per_fmr = LNET_MAX_PAYLOAD/PAGE_SIZE,
1472 .page_shift = PAGE_SHIFT,
1473 .access = (IB_ACCESS_LOCAL_WRITE |
1474 IB_ACCESS_REMOTE_WRITE),
1475 .pool_size = fps->fps_pool_size,
1476 .dirty_watermark = fps->fps_flush_trigger,
1477 .flush_function = NULL,
1479 .cache = !!fps->fps_cache };
1482 fpo->fmr.fpo_fmr_pool = ib_create_fmr_pool(fpo->fpo_hdev->ibh_pd,
1484 if (IS_ERR(fpo->fmr.fpo_fmr_pool)) {
1485 rc = PTR_ERR(fpo->fmr.fpo_fmr_pool);
1487 CERROR("Failed to create FMR pool: %d\n", rc);
1489 CERROR("FMRs are not supported\n");
1495 static int kiblnd_alloc_freg_pool(kib_fmr_poolset_t *fps, kib_fmr_pool_t *fpo)
1497 struct kib_fast_reg_descriptor *frd, *tmp;
1500 INIT_LIST_HEAD(&fpo->fast_reg.fpo_pool_list);
1501 fpo->fast_reg.fpo_pool_size = 0;
1502 for (i = 0; i < fps->fps_pool_size; i++) {
1503 LIBCFS_CPT_ALLOC(frd, lnet_cpt_table(), fps->fps_cpt,
1506 CERROR("Failed to allocate a new fast_reg descriptor\n");
1512 #ifndef HAVE_IB_MAP_MR_SG
1513 frd->frd_frpl = ib_alloc_fast_reg_page_list(fpo->fpo_hdev->ibh_ibdev,
1514 LNET_MAX_PAYLOAD/PAGE_SIZE);
1515 if (IS_ERR(frd->frd_frpl)) {
1516 rc = PTR_ERR(frd->frd_frpl);
1517 CERROR("Failed to allocate ib_fast_reg_page_list: %d\n",
1519 frd->frd_frpl = NULL;
1524 #ifdef HAVE_IB_ALLOC_FAST_REG_MR
1525 frd->frd_mr = ib_alloc_fast_reg_mr(fpo->fpo_hdev->ibh_pd,
1526 LNET_MAX_PAYLOAD/PAGE_SIZE);
1528 frd->frd_mr = ib_alloc_mr(fpo->fpo_hdev->ibh_pd,
1530 LNET_MAX_PAYLOAD/PAGE_SIZE);
1532 if (IS_ERR(frd->frd_mr)) {
1533 rc = PTR_ERR(frd->frd_mr);
1534 CERROR("Failed to allocate ib_fast_reg_mr: %d\n", rc);
1539 /* There appears to be a bug in MLX5 code where you must
1540 * invalidate the rkey of a new FastReg pool before first
1541 * using it. Thus, I am marking the FRD invalid here. */
1542 frd->frd_valid = false;
1544 list_add_tail(&frd->frd_list, &fpo->fast_reg.fpo_pool_list);
1545 fpo->fast_reg.fpo_pool_size++;
1552 ib_dereg_mr(frd->frd_mr);
1553 #ifndef HAVE_IB_MAP_MR_SG
1555 ib_free_fast_reg_page_list(frd->frd_frpl);
1557 LIBCFS_FREE(frd, sizeof(*frd));
1560 list_for_each_entry_safe(frd, tmp, &fpo->fast_reg.fpo_pool_list,
1562 list_del(&frd->frd_list);
1563 #ifndef HAVE_IB_MAP_MR_SG
1564 ib_free_fast_reg_page_list(frd->frd_frpl);
1566 ib_dereg_mr(frd->frd_mr);
1567 LIBCFS_FREE(frd, sizeof(*frd));
1574 kiblnd_create_fmr_pool(kib_fmr_poolset_t *fps, kib_fmr_pool_t **pp_fpo)
1576 struct ib_device_attr *dev_attr;
1577 kib_dev_t *dev = fps->fps_net->ibn_dev;
1578 kib_fmr_pool_t *fpo;
1581 #ifndef HAVE_IB_DEVICE_ATTRS
1582 dev_attr = kmalloc(sizeof(*dev_attr), GFP_KERNEL);
1587 LIBCFS_CPT_ALLOC(fpo, lnet_cpt_table(), fps->fps_cpt, sizeof(*fpo));
1593 fpo->fpo_hdev = kiblnd_current_hdev(dev);
1595 #ifdef HAVE_IB_DEVICE_ATTRS
1596 dev_attr = &fpo->fpo_hdev->ibh_ibdev->attrs;
1598 rc = ib_query_device(fpo->fpo_hdev->ibh_ibdev, dev_attr);
1600 CERROR("Query device failed for %s: %d\n",
1601 fpo->fpo_hdev->ibh_ibdev->name, rc);
1606 /* Check for FMR or FastReg support */
1607 fpo->fpo_is_fmr = 0;
1608 if (fpo->fpo_hdev->ibh_ibdev->alloc_fmr &&
1609 fpo->fpo_hdev->ibh_ibdev->dealloc_fmr &&
1610 fpo->fpo_hdev->ibh_ibdev->map_phys_fmr &&
1611 fpo->fpo_hdev->ibh_ibdev->unmap_fmr) {
1612 LCONSOLE_INFO("Using FMR for registration\n");
1613 fpo->fpo_is_fmr = 1;
1614 } else if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) {
1615 LCONSOLE_INFO("Using FastReg for registration\n");
1618 LCONSOLE_ERROR_MSG(rc, "IB device does not support FMRs nor FastRegs, can't register memory\n");
1622 if (fpo->fpo_is_fmr)
1623 rc = kiblnd_alloc_fmr_pool(fps, fpo);
1625 rc = kiblnd_alloc_freg_pool(fps, fpo);
1629 #ifndef HAVE_IB_DEVICE_ATTRS
1632 fpo->fpo_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1633 fpo->fpo_owner = fps;
1639 kiblnd_hdev_decref(fpo->fpo_hdev);
1640 LIBCFS_FREE(fpo, sizeof(*fpo));
1643 #ifndef HAVE_IB_DEVICE_ATTRS
1651 kiblnd_fail_fmr_poolset(kib_fmr_poolset_t *fps, struct list_head *zombies)
1653 if (fps->fps_net == NULL) /* intialized? */
1656 spin_lock(&fps->fps_lock);
1658 while (!list_empty(&fps->fps_pool_list)) {
1659 kib_fmr_pool_t *fpo = list_entry(fps->fps_pool_list.next,
1660 kib_fmr_pool_t, fpo_list);
1661 fpo->fpo_failed = 1;
1662 list_del(&fpo->fpo_list);
1663 if (fpo->fpo_map_count == 0)
1664 list_add(&fpo->fpo_list, zombies);
1666 list_add(&fpo->fpo_list, &fps->fps_failed_pool_list);
1669 spin_unlock(&fps->fps_lock);
1673 kiblnd_fini_fmr_poolset(kib_fmr_poolset_t *fps)
1675 if (fps->fps_net != NULL) { /* initialized? */
1676 kiblnd_destroy_fmr_pool_list(&fps->fps_failed_pool_list);
1677 kiblnd_destroy_fmr_pool_list(&fps->fps_pool_list);
1682 kiblnd_init_fmr_poolset(kib_fmr_poolset_t *fps, int cpt, int ncpts,
1684 struct lnet_ioctl_config_o2iblnd_tunables *tunables)
1686 kib_fmr_pool_t *fpo;
1689 memset(fps, 0, sizeof(kib_fmr_poolset_t));
1694 fps->fps_pool_size = kiblnd_fmr_pool_size(tunables, ncpts);
1695 fps->fps_flush_trigger = kiblnd_fmr_flush_trigger(tunables, ncpts);
1696 fps->fps_cache = tunables->lnd_fmr_cache;
1698 spin_lock_init(&fps->fps_lock);
1699 INIT_LIST_HEAD(&fps->fps_pool_list);
1700 INIT_LIST_HEAD(&fps->fps_failed_pool_list);
1702 rc = kiblnd_create_fmr_pool(fps, &fpo);
1704 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1710 kiblnd_fmr_pool_is_idle(kib_fmr_pool_t *fpo, cfs_time_t now)
1712 if (fpo->fpo_map_count != 0) /* still in use */
1714 if (fpo->fpo_failed)
1716 return cfs_time_aftereq(now, fpo->fpo_deadline);
1720 kiblnd_map_tx_pages(kib_tx_t *tx, kib_rdma_desc_t *rd)
1722 kib_hca_dev_t *hdev;
1723 __u64 *pages = tx->tx_pages;
1728 hdev = tx->tx_pool->tpo_hdev;
1730 for (i = 0, npages = 0; i < rd->rd_nfrags; i++) {
1731 for (size = 0; size < rd->rd_frags[i].rf_nob;
1732 size += hdev->ibh_page_size) {
1733 pages[npages++] = (rd->rd_frags[i].rf_addr &
1734 hdev->ibh_page_mask) + size;
1742 kiblnd_fmr_pool_unmap(kib_fmr_t *fmr, int status)
1744 struct list_head zombies = LIST_HEAD_INIT(zombies);
1745 kib_fmr_pool_t *fpo = fmr->fmr_pool;
1746 kib_fmr_poolset_t *fps;
1747 cfs_time_t now = cfs_time_current();
1748 kib_fmr_pool_t *tmp;
1754 fps = fpo->fpo_owner;
1755 if (fpo->fpo_is_fmr) {
1756 if (fmr->fmr_pfmr) {
1757 rc = ib_fmr_pool_unmap(fmr->fmr_pfmr);
1759 fmr->fmr_pfmr = NULL;
1763 rc = ib_flush_fmr_pool(fpo->fmr.fpo_fmr_pool);
1767 struct kib_fast_reg_descriptor *frd = fmr->fmr_frd;
1770 frd->frd_valid = false;
1771 spin_lock(&fps->fps_lock);
1772 list_add_tail(&frd->frd_list, &fpo->fast_reg.fpo_pool_list);
1773 spin_unlock(&fps->fps_lock);
1774 fmr->fmr_frd = NULL;
1777 fmr->fmr_pool = NULL;
1779 spin_lock(&fps->fps_lock);
1780 fpo->fpo_map_count--; /* decref the pool */
1782 list_for_each_entry_safe(fpo, tmp, &fps->fps_pool_list, fpo_list) {
1783 /* the first pool is persistent */
1784 if (fps->fps_pool_list.next == &fpo->fpo_list)
1787 if (kiblnd_fmr_pool_is_idle(fpo, now)) {
1788 list_move(&fpo->fpo_list, &zombies);
1792 spin_unlock(&fps->fps_lock);
1794 if (!list_empty(&zombies))
1795 kiblnd_destroy_fmr_pool_list(&zombies);
1799 kiblnd_fmr_pool_map(kib_fmr_poolset_t *fps, kib_tx_t *tx, kib_rdma_desc_t *rd,
1800 __u32 nob, __u64 iov, kib_fmr_t *fmr)
1802 kib_fmr_pool_t *fpo;
1803 __u64 *pages = tx->tx_pages;
1805 bool is_rx = (rd != tx->tx_rd);
1806 bool tx_pages_mapped = 0;
1811 spin_lock(&fps->fps_lock);
1812 version = fps->fps_version;
1813 list_for_each_entry(fpo, &fps->fps_pool_list, fpo_list) {
1814 fpo->fpo_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1815 fpo->fpo_map_count++;
1817 if (fpo->fpo_is_fmr) {
1818 struct ib_pool_fmr *pfmr;
1820 spin_unlock(&fps->fps_lock);
1822 if (!tx_pages_mapped) {
1823 npages = kiblnd_map_tx_pages(tx, rd);
1824 tx_pages_mapped = 1;
1827 pfmr = ib_fmr_pool_map_phys(fpo->fmr.fpo_fmr_pool,
1828 pages, npages, iov);
1829 if (likely(!IS_ERR(pfmr))) {
1830 fmr->fmr_key = is_rx ? pfmr->fmr->rkey
1832 fmr->fmr_frd = NULL;
1833 fmr->fmr_pfmr = pfmr;
1834 fmr->fmr_pool = fpo;
1839 if (!list_empty(&fpo->fast_reg.fpo_pool_list)) {
1840 struct kib_fast_reg_descriptor *frd;
1841 #ifdef HAVE_IB_MAP_MR_SG
1842 struct ib_reg_wr *wr;
1845 struct ib_rdma_wr *wr;
1846 struct ib_fast_reg_page_list *frpl;
1850 frd = list_first_entry(&fpo->fast_reg.fpo_pool_list,
1851 struct kib_fast_reg_descriptor,
1853 list_del(&frd->frd_list);
1854 spin_unlock(&fps->fps_lock);
1856 #ifndef HAVE_IB_MAP_MR_SG
1857 frpl = frd->frd_frpl;
1861 if (!frd->frd_valid) {
1862 struct ib_rdma_wr *inv_wr;
1863 __u32 key = is_rx ? mr->rkey : mr->lkey;
1865 inv_wr = &frd->frd_inv_wr;
1866 memset(inv_wr, 0, sizeof(*inv_wr));
1868 inv_wr->wr.opcode = IB_WR_LOCAL_INV;
1869 inv_wr->wr.wr_id = IBLND_WID_MR;
1870 inv_wr->wr.ex.invalidate_rkey = key;
1873 key = ib_inc_rkey(key);
1874 ib_update_fast_reg_key(mr, key);
1877 #ifdef HAVE_IB_MAP_MR_SG
1878 #ifdef HAVE_IB_MAP_MR_SG_5ARGS
1879 n = ib_map_mr_sg(mr, tx->tx_frags,
1880 tx->tx_nfrags, NULL, PAGE_SIZE);
1882 n = ib_map_mr_sg(mr, tx->tx_frags,
1883 tx->tx_nfrags, PAGE_SIZE);
1885 if (unlikely(n != tx->tx_nfrags)) {
1886 CERROR("Failed to map mr %d/%d "
1887 "elements\n", n, tx->tx_nfrags);
1888 return n < 0 ? n : -EINVAL;
1893 wr = &frd->frd_fastreg_wr;
1894 memset(wr, 0, sizeof(*wr));
1896 wr->wr.opcode = IB_WR_REG_MR;
1897 wr->wr.wr_id = IBLND_WID_MR;
1899 wr->wr.send_flags = 0;
1901 wr->key = is_rx ? mr->rkey : mr->lkey;
1902 wr->access = (IB_ACCESS_LOCAL_WRITE |
1903 IB_ACCESS_REMOTE_WRITE);
1905 if (!tx_pages_mapped) {
1906 npages = kiblnd_map_tx_pages(tx, rd);
1907 tx_pages_mapped = 1;
1910 LASSERT(npages <= frpl->max_page_list_len);
1911 memcpy(frpl->page_list, pages,
1912 sizeof(*pages) * npages);
1914 /* Prepare FastReg WR */
1915 wr = &frd->frd_fastreg_wr;
1916 memset(wr, 0, sizeof(*wr));
1918 wr->wr.opcode = IB_WR_FAST_REG_MR;
1919 wr->wr.wr_id = IBLND_WID_MR;
1921 wr->wr.wr.fast_reg.iova_start = iov;
1922 wr->wr.wr.fast_reg.page_list = frpl;
1923 wr->wr.wr.fast_reg.page_list_len = npages;
1924 wr->wr.wr.fast_reg.page_shift = PAGE_SHIFT;
1925 wr->wr.wr.fast_reg.length = nob;
1926 wr->wr.wr.fast_reg.rkey =
1927 is_rx ? mr->rkey : mr->lkey;
1928 wr->wr.wr.fast_reg.access_flags =
1929 (IB_ACCESS_LOCAL_WRITE |
1930 IB_ACCESS_REMOTE_WRITE);
1933 fmr->fmr_key = is_rx ? mr->rkey : mr->lkey;
1935 fmr->fmr_pfmr = NULL;
1936 fmr->fmr_pool = fpo;
1939 spin_unlock(&fps->fps_lock);
1943 spin_lock(&fps->fps_lock);
1944 fpo->fpo_map_count--;
1945 if (rc != -EAGAIN) {
1946 spin_unlock(&fps->fps_lock);
1950 /* EAGAIN and ... */
1951 if (version != fps->fps_version) {
1952 spin_unlock(&fps->fps_lock);
1957 if (fps->fps_increasing) {
1958 spin_unlock(&fps->fps_lock);
1959 CDEBUG(D_NET, "Another thread is allocating new "
1960 "FMR pool, waiting for her to complete\n");
1966 if (cfs_time_before(cfs_time_current(), fps->fps_next_retry)) {
1967 /* someone failed recently */
1968 spin_unlock(&fps->fps_lock);
1972 fps->fps_increasing = 1;
1973 spin_unlock(&fps->fps_lock);
1975 CDEBUG(D_NET, "Allocate new FMR pool\n");
1976 rc = kiblnd_create_fmr_pool(fps, &fpo);
1977 spin_lock(&fps->fps_lock);
1978 fps->fps_increasing = 0;
1981 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1983 fps->fps_next_retry = cfs_time_shift(IBLND_POOL_RETRY);
1985 spin_unlock(&fps->fps_lock);
1991 kiblnd_fini_pool(kib_pool_t *pool)
1993 LASSERT(list_empty(&pool->po_free_list));
1994 LASSERT(pool->po_allocated == 0);
1996 CDEBUG(D_NET, "Finalize %s pool\n", pool->po_owner->ps_name);
2000 kiblnd_init_pool(kib_poolset_t *ps, kib_pool_t *pool, int size)
2002 CDEBUG(D_NET, "Initialize %s pool\n", ps->ps_name);
2004 memset(pool, 0, sizeof(kib_pool_t));
2005 INIT_LIST_HEAD(&pool->po_free_list);
2006 pool->po_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
2007 pool->po_owner = ps;
2008 pool->po_size = size;
2012 kiblnd_destroy_pool_list(struct list_head *head)
2016 while (!list_empty(head)) {
2017 pool = list_entry(head->next, kib_pool_t, po_list);
2018 list_del(&pool->po_list);
2020 LASSERT(pool->po_owner != NULL);
2021 pool->po_owner->ps_pool_destroy(pool);
2026 kiblnd_fail_poolset(kib_poolset_t *ps, struct list_head *zombies)
2028 if (ps->ps_net == NULL) /* intialized? */
2031 spin_lock(&ps->ps_lock);
2032 while (!list_empty(&ps->ps_pool_list)) {
2033 kib_pool_t *po = list_entry(ps->ps_pool_list.next,
2034 kib_pool_t, po_list);
2036 list_del(&po->po_list);
2037 if (po->po_allocated == 0)
2038 list_add(&po->po_list, zombies);
2040 list_add(&po->po_list, &ps->ps_failed_pool_list);
2042 spin_unlock(&ps->ps_lock);
2046 kiblnd_fini_poolset(kib_poolset_t *ps)
2048 if (ps->ps_net != NULL) { /* initialized? */
2049 kiblnd_destroy_pool_list(&ps->ps_failed_pool_list);
2050 kiblnd_destroy_pool_list(&ps->ps_pool_list);
2055 kiblnd_init_poolset(kib_poolset_t *ps, int cpt,
2056 kib_net_t *net, char *name, int size,
2057 kib_ps_pool_create_t po_create,
2058 kib_ps_pool_destroy_t po_destroy,
2059 kib_ps_node_init_t nd_init,
2060 kib_ps_node_fini_t nd_fini)
2065 memset(ps, 0, sizeof(kib_poolset_t));
2069 ps->ps_pool_create = po_create;
2070 ps->ps_pool_destroy = po_destroy;
2071 ps->ps_node_init = nd_init;
2072 ps->ps_node_fini = nd_fini;
2073 ps->ps_pool_size = size;
2074 if (strlcpy(ps->ps_name, name, sizeof(ps->ps_name))
2075 >= sizeof(ps->ps_name))
2077 spin_lock_init(&ps->ps_lock);
2078 INIT_LIST_HEAD(&ps->ps_pool_list);
2079 INIT_LIST_HEAD(&ps->ps_failed_pool_list);
2081 rc = ps->ps_pool_create(ps, size, &pool);
2083 list_add(&pool->po_list, &ps->ps_pool_list);
2085 CERROR("Failed to create the first pool for %s\n", ps->ps_name);
2091 kiblnd_pool_is_idle(kib_pool_t *pool, cfs_time_t now)
2093 if (pool->po_allocated != 0) /* still in use */
2095 if (pool->po_failed)
2097 return cfs_time_aftereq(now, pool->po_deadline);
2101 kiblnd_pool_free_node(kib_pool_t *pool, struct list_head *node)
2103 struct list_head zombies = LIST_HEAD_INIT(zombies);
2104 kib_poolset_t *ps = pool->po_owner;
2106 cfs_time_t now = cfs_time_current();
2108 spin_lock(&ps->ps_lock);
2110 if (ps->ps_node_fini != NULL)
2111 ps->ps_node_fini(pool, node);
2113 LASSERT(pool->po_allocated > 0);
2114 list_add(node, &pool->po_free_list);
2115 pool->po_allocated--;
2117 list_for_each_entry_safe(pool, tmp, &ps->ps_pool_list, po_list) {
2118 /* the first pool is persistent */
2119 if (ps->ps_pool_list.next == &pool->po_list)
2122 if (kiblnd_pool_is_idle(pool, now))
2123 list_move(&pool->po_list, &zombies);
2125 spin_unlock(&ps->ps_lock);
2127 if (!list_empty(&zombies))
2128 kiblnd_destroy_pool_list(&zombies);
2132 kiblnd_pool_alloc_node(kib_poolset_t *ps)
2134 struct list_head *node;
2137 unsigned int interval = 1;
2138 cfs_time_t time_before;
2139 unsigned int trips = 0;
2142 spin_lock(&ps->ps_lock);
2143 list_for_each_entry(pool, &ps->ps_pool_list, po_list) {
2144 if (list_empty(&pool->po_free_list))
2147 pool->po_allocated++;
2148 pool->po_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
2149 node = pool->po_free_list.next;
2152 if (ps->ps_node_init != NULL) {
2153 /* still hold the lock */
2154 ps->ps_node_init(pool, node);
2156 spin_unlock(&ps->ps_lock);
2160 /* no available tx pool and ... */
2161 if (ps->ps_increasing) {
2162 /* another thread is allocating a new pool */
2163 spin_unlock(&ps->ps_lock);
2165 CDEBUG(D_NET, "Another thread is allocating new "
2166 "%s pool, waiting %d HZs for her to complete."
2168 ps->ps_name, interval, trips);
2170 set_current_state(TASK_INTERRUPTIBLE);
2171 schedule_timeout(interval);
2172 if (interval < cfs_time_seconds(1))
2178 if (cfs_time_before(cfs_time_current(), ps->ps_next_retry)) {
2179 /* someone failed recently */
2180 spin_unlock(&ps->ps_lock);
2184 ps->ps_increasing = 1;
2185 spin_unlock(&ps->ps_lock);
2187 CDEBUG(D_NET, "%s pool exhausted, allocate new pool\n", ps->ps_name);
2188 time_before = cfs_time_current();
2189 rc = ps->ps_pool_create(ps, ps->ps_pool_size, &pool);
2190 CDEBUG(D_NET, "ps_pool_create took %lu HZ to complete",
2191 cfs_time_current() - time_before);
2193 spin_lock(&ps->ps_lock);
2194 ps->ps_increasing = 0;
2196 list_add_tail(&pool->po_list, &ps->ps_pool_list);
2198 ps->ps_next_retry = cfs_time_shift(IBLND_POOL_RETRY);
2199 CERROR("Can't allocate new %s pool because out of memory\n",
2202 spin_unlock(&ps->ps_lock);
2208 kiblnd_destroy_tx_pool(kib_pool_t *pool)
2210 kib_tx_pool_t *tpo = container_of(pool, kib_tx_pool_t, tpo_pool);
2213 LASSERT (pool->po_allocated == 0);
2215 if (tpo->tpo_tx_pages != NULL) {
2216 kiblnd_unmap_tx_pool(tpo);
2217 kiblnd_free_pages(tpo->tpo_tx_pages);
2220 if (tpo->tpo_tx_descs == NULL)
2223 for (i = 0; i < pool->po_size; i++) {
2224 kib_tx_t *tx = &tpo->tpo_tx_descs[i];
2226 list_del(&tx->tx_list);
2227 if (tx->tx_pages != NULL)
2228 LIBCFS_FREE(tx->tx_pages,
2230 sizeof(*tx->tx_pages));
2231 if (tx->tx_frags != NULL)
2232 LIBCFS_FREE(tx->tx_frags,
2233 (1 + IBLND_MAX_RDMA_FRAGS) *
2234 sizeof(*tx->tx_frags));
2235 if (tx->tx_wrq != NULL)
2236 LIBCFS_FREE(tx->tx_wrq,
2237 (1 + IBLND_MAX_RDMA_FRAGS) *
2238 sizeof(*tx->tx_wrq));
2239 if (tx->tx_sge != NULL)
2240 LIBCFS_FREE(tx->tx_sge,
2241 (1 + IBLND_MAX_RDMA_FRAGS) *
2242 sizeof(*tx->tx_sge));
2243 if (tx->tx_rd != NULL)
2244 LIBCFS_FREE(tx->tx_rd,
2245 offsetof(kib_rdma_desc_t,
2246 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2249 LIBCFS_FREE(tpo->tpo_tx_descs,
2250 pool->po_size * sizeof(kib_tx_t));
2252 kiblnd_fini_pool(pool);
2253 LIBCFS_FREE(tpo, sizeof(kib_tx_pool_t));
2256 static int kiblnd_tx_pool_size(int ncpts)
2258 int ntx = *kiblnd_tunables.kib_ntx / ncpts;
2260 return max(IBLND_TX_POOL, ntx);
2264 kiblnd_create_tx_pool(kib_poolset_t *ps, int size, kib_pool_t **pp_po)
2271 LIBCFS_CPT_ALLOC(tpo, lnet_cpt_table(), ps->ps_cpt, sizeof(*tpo));
2273 CERROR("Failed to allocate TX pool\n");
2277 pool = &tpo->tpo_pool;
2278 kiblnd_init_pool(ps, pool, size);
2279 tpo->tpo_tx_descs = NULL;
2280 tpo->tpo_tx_pages = NULL;
2282 npg = (size * IBLND_MSG_SIZE + PAGE_SIZE - 1) / PAGE_SIZE;
2283 if (kiblnd_alloc_pages(&tpo->tpo_tx_pages, ps->ps_cpt, npg) != 0) {
2284 CERROR("Can't allocate tx pages: %d\n", npg);
2285 LIBCFS_FREE(tpo, sizeof(kib_tx_pool_t));
2289 LIBCFS_CPT_ALLOC(tpo->tpo_tx_descs, lnet_cpt_table(), ps->ps_cpt,
2290 size * sizeof(kib_tx_t));
2291 if (tpo->tpo_tx_descs == NULL) {
2292 CERROR("Can't allocate %d tx descriptors\n", size);
2293 ps->ps_pool_destroy(pool);
2297 memset(tpo->tpo_tx_descs, 0, size * sizeof(kib_tx_t));
2299 for (i = 0; i < size; i++) {
2300 kib_tx_t *tx = &tpo->tpo_tx_descs[i];
2303 if (ps->ps_net->ibn_fmr_ps != NULL) {
2304 LIBCFS_CPT_ALLOC(tx->tx_pages,
2305 lnet_cpt_table(), ps->ps_cpt,
2306 LNET_MAX_IOV * sizeof(*tx->tx_pages));
2307 if (tx->tx_pages == NULL)
2311 LIBCFS_CPT_ALLOC(tx->tx_frags, lnet_cpt_table(), ps->ps_cpt,
2312 (1 + IBLND_MAX_RDMA_FRAGS) *
2313 sizeof(*tx->tx_frags));
2314 if (tx->tx_frags == NULL)
2317 sg_init_table(tx->tx_frags, IBLND_MAX_RDMA_FRAGS + 1);
2319 LIBCFS_CPT_ALLOC(tx->tx_wrq, lnet_cpt_table(), ps->ps_cpt,
2320 (1 + IBLND_MAX_RDMA_FRAGS) *
2321 sizeof(*tx->tx_wrq));
2322 if (tx->tx_wrq == NULL)
2325 LIBCFS_CPT_ALLOC(tx->tx_sge, lnet_cpt_table(), ps->ps_cpt,
2326 (1 + IBLND_MAX_RDMA_FRAGS) *
2327 sizeof(*tx->tx_sge));
2328 if (tx->tx_sge == NULL)
2331 LIBCFS_CPT_ALLOC(tx->tx_rd, lnet_cpt_table(), ps->ps_cpt,
2332 offsetof(kib_rdma_desc_t,
2333 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2334 if (tx->tx_rd == NULL)
2339 kiblnd_map_tx_pool(tpo);
2344 ps->ps_pool_destroy(pool);
2349 kiblnd_tx_init(kib_pool_t *pool, struct list_head *node)
2351 kib_tx_poolset_t *tps = container_of(pool->po_owner, kib_tx_poolset_t,
2353 kib_tx_t *tx = list_entry(node, kib_tx_t, tx_list);
2355 tx->tx_cookie = tps->tps_next_tx_cookie++;
2359 kiblnd_net_fini_pools(kib_net_t *net)
2363 cfs_cpt_for_each(i, lnet_cpt_table()) {
2364 kib_tx_poolset_t *tps;
2365 kib_fmr_poolset_t *fps;
2367 if (net->ibn_tx_ps != NULL) {
2368 tps = net->ibn_tx_ps[i];
2369 kiblnd_fini_poolset(&tps->tps_poolset);
2372 if (net->ibn_fmr_ps != NULL) {
2373 fps = net->ibn_fmr_ps[i];
2374 kiblnd_fini_fmr_poolset(fps);
2378 if (net->ibn_tx_ps != NULL) {
2379 cfs_percpt_free(net->ibn_tx_ps);
2380 net->ibn_tx_ps = NULL;
2383 if (net->ibn_fmr_ps != NULL) {
2384 cfs_percpt_free(net->ibn_fmr_ps);
2385 net->ibn_fmr_ps = NULL;
2390 kiblnd_net_init_pools(kib_net_t *net, lnet_ni_t *ni, __u32 *cpts, int ncpts)
2392 struct lnet_ioctl_config_o2iblnd_tunables *tunables;
2393 unsigned long flags;
2398 tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib;
2400 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2401 if (tunables->lnd_map_on_demand == 0) {
2402 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
2404 goto create_tx_pool;
2407 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2409 if (tunables->lnd_fmr_pool_size < *kiblnd_tunables.kib_ntx / 4) {
2410 CERROR("Can't set fmr pool size (%d) < ntx / 4(%d)\n",
2411 tunables->lnd_fmr_pool_size,
2412 *kiblnd_tunables.kib_ntx / 4);
2417 /* TX pool must be created later than FMR, see LU-2268
2419 LASSERT(net->ibn_tx_ps == NULL);
2421 /* premapping can fail if ibd_nmr > 1, so we always create
2422 * FMR pool and map-on-demand if premapping failed */
2424 net->ibn_fmr_ps = cfs_percpt_alloc(lnet_cpt_table(),
2425 sizeof(kib_fmr_poolset_t));
2426 if (net->ibn_fmr_ps == NULL) {
2427 CERROR("Failed to allocate FMR pool array\n");
2432 for (i = 0; i < ncpts; i++) {
2433 cpt = (cpts == NULL) ? i : cpts[i];
2434 rc = kiblnd_init_fmr_poolset(net->ibn_fmr_ps[cpt], cpt, ncpts,
2437 CERROR("Can't initialize FMR pool for CPT %d: %d\n",
2444 LASSERT(i == ncpts);
2447 net->ibn_tx_ps = cfs_percpt_alloc(lnet_cpt_table(),
2448 sizeof(kib_tx_poolset_t));
2449 if (net->ibn_tx_ps == NULL) {
2450 CERROR("Failed to allocate tx pool array\n");
2455 for (i = 0; i < ncpts; i++) {
2456 cpt = (cpts == NULL) ? i : cpts[i];
2457 rc = kiblnd_init_poolset(&net->ibn_tx_ps[cpt]->tps_poolset,
2459 kiblnd_tx_pool_size(ncpts),
2460 kiblnd_create_tx_pool,
2461 kiblnd_destroy_tx_pool,
2462 kiblnd_tx_init, NULL);
2464 CERROR("Can't initialize TX pool for CPT %d: %d\n",
2472 kiblnd_net_fini_pools(net);
2478 kiblnd_hdev_get_attr(kib_hca_dev_t *hdev)
2480 #ifndef HAVE_IB_DEVICE_ATTRS
2481 struct ib_device_attr *attr;
2485 /* It's safe to assume a HCA can handle a page size
2486 * matching that of the native system */
2487 hdev->ibh_page_shift = PAGE_SHIFT;
2488 hdev->ibh_page_size = 1 << PAGE_SHIFT;
2489 hdev->ibh_page_mask = ~((__u64)hdev->ibh_page_size - 1);
2491 #ifdef HAVE_IB_DEVICE_ATTRS
2492 hdev->ibh_mr_size = hdev->ibh_ibdev->attrs.max_mr_size;
2494 LIBCFS_ALLOC(attr, sizeof(*attr));
2496 CERROR("Out of memory\n");
2500 rc = ib_query_device(hdev->ibh_ibdev, attr);
2502 hdev->ibh_mr_size = attr->max_mr_size;
2504 LIBCFS_FREE(attr, sizeof(*attr));
2507 CERROR("Failed to query IB device: %d\n", rc);
2512 if (hdev->ibh_mr_size == ~0ULL) {
2513 hdev->ibh_mr_shift = 64;
2517 CERROR("Invalid mr size: %#llx\n", hdev->ibh_mr_size);
2522 kiblnd_hdev_cleanup_mrs(kib_hca_dev_t *hdev)
2524 if (hdev->ibh_mrs == NULL)
2527 ib_dereg_mr(hdev->ibh_mrs);
2529 hdev->ibh_mrs = NULL;
2533 kiblnd_hdev_destroy(kib_hca_dev_t *hdev)
2535 kiblnd_hdev_cleanup_mrs(hdev);
2537 if (hdev->ibh_pd != NULL)
2538 ib_dealloc_pd(hdev->ibh_pd);
2540 if (hdev->ibh_cmid != NULL)
2541 rdma_destroy_id(hdev->ibh_cmid);
2543 LIBCFS_FREE(hdev, sizeof(*hdev));
2547 kiblnd_hdev_setup_mrs(kib_hca_dev_t *hdev)
2551 int acflags = IB_ACCESS_LOCAL_WRITE |
2552 IB_ACCESS_REMOTE_WRITE;
2554 rc = kiblnd_hdev_get_attr(hdev);
2558 mr = ib_get_dma_mr(hdev->ibh_pd, acflags);
2560 CERROR("Failed ib_get_dma_mr: %ld\n", PTR_ERR(mr));
2561 kiblnd_hdev_cleanup_mrs(hdev);
2571 kiblnd_dummy_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event)
2577 kiblnd_dev_need_failover(kib_dev_t *dev)
2579 struct rdma_cm_id *cmid;
2580 struct sockaddr_in srcaddr;
2581 struct sockaddr_in dstaddr;
2584 if (dev->ibd_hdev == NULL || /* initializing */
2585 dev->ibd_hdev->ibh_cmid == NULL || /* listener is dead */
2586 *kiblnd_tunables.kib_dev_failover > 1) /* debugging */
2589 /* XXX: it's UGLY, but I don't have better way to find
2590 * ib-bonding HCA failover because:
2592 * a. no reliable CM event for HCA failover...
2593 * b. no OFED API to get ib_device for current net_device...
2595 * We have only two choices at this point:
2597 * a. rdma_bind_addr(), it will conflict with listener cmid
2598 * b. rdma_resolve_addr() to zero addr */
2599 cmid = kiblnd_rdma_create_id(kiblnd_dummy_callback, dev, RDMA_PS_TCP,
2603 CERROR("Failed to create cmid for failover: %d\n", rc);
2607 memset(&srcaddr, 0, sizeof(srcaddr));
2608 srcaddr.sin_family = AF_INET;
2609 srcaddr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2611 memset(&dstaddr, 0, sizeof(dstaddr));
2612 dstaddr.sin_family = AF_INET;
2613 rc = rdma_resolve_addr(cmid, (struct sockaddr *)&srcaddr,
2614 (struct sockaddr *)&dstaddr, 1);
2615 if (rc != 0 || cmid->device == NULL) {
2616 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2617 dev->ibd_ifname, &dev->ibd_ifip,
2619 rdma_destroy_id(cmid);
2623 rc = dev->ibd_hdev->ibh_ibdev != cmid->device; /* true for failover */
2624 rdma_destroy_id(cmid);
2629 kiblnd_dev_failover(kib_dev_t *dev)
2631 struct list_head zombie_tpo = LIST_HEAD_INIT(zombie_tpo);
2632 struct list_head zombie_ppo = LIST_HEAD_INIT(zombie_ppo);
2633 struct list_head zombie_fpo = LIST_HEAD_INIT(zombie_fpo);
2634 struct rdma_cm_id *cmid = NULL;
2635 kib_hca_dev_t *hdev = NULL;
2639 struct sockaddr_in addr;
2640 unsigned long flags;
2644 LASSERT (*kiblnd_tunables.kib_dev_failover > 1 ||
2645 dev->ibd_can_failover ||
2646 dev->ibd_hdev == NULL);
2648 rc = kiblnd_dev_need_failover(dev);
2652 if (dev->ibd_hdev != NULL &&
2653 dev->ibd_hdev->ibh_cmid != NULL) {
2654 /* XXX it's not good to close old listener at here,
2655 * because we can fail to create new listener.
2656 * But we have to close it now, otherwise rdma_bind_addr
2657 * will return EADDRINUSE... How crap! */
2658 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2660 cmid = dev->ibd_hdev->ibh_cmid;
2661 /* make next schedule of kiblnd_dev_need_failover()
2662 * return 1 for me */
2663 dev->ibd_hdev->ibh_cmid = NULL;
2664 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2666 rdma_destroy_id(cmid);
2669 cmid = kiblnd_rdma_create_id(kiblnd_cm_callback, dev, RDMA_PS_TCP,
2673 CERROR("Failed to create cmid for failover: %d\n", rc);
2677 memset(&addr, 0, sizeof(addr));
2678 addr.sin_family = AF_INET;
2679 addr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2680 addr.sin_port = htons(*kiblnd_tunables.kib_service);
2682 /* Bind to failover device or port */
2683 rc = rdma_bind_addr(cmid, (struct sockaddr *)&addr);
2684 if (rc != 0 || cmid->device == NULL) {
2685 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2686 dev->ibd_ifname, &dev->ibd_ifip,
2688 rdma_destroy_id(cmid);
2692 LIBCFS_ALLOC(hdev, sizeof(*hdev));
2694 CERROR("Failed to allocate kib_hca_dev\n");
2695 rdma_destroy_id(cmid);
2700 atomic_set(&hdev->ibh_ref, 1);
2701 hdev->ibh_dev = dev;
2702 hdev->ibh_cmid = cmid;
2703 hdev->ibh_ibdev = cmid->device;
2705 pd = ib_alloc_pd(cmid->device);
2708 CERROR("Can't allocate PD: %d\n", rc);
2714 rc = rdma_listen(cmid, 0);
2716 CERROR("Can't start new listener: %d\n", rc);
2720 rc = kiblnd_hdev_setup_mrs(hdev);
2722 CERROR("Can't setup device: %d\n", rc);
2726 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2728 old = dev->ibd_hdev;
2729 dev->ibd_hdev = hdev; /* take over the refcount */
2732 list_for_each_entry(net, &dev->ibd_nets, ibn_list) {
2733 cfs_cpt_for_each(i, lnet_cpt_table()) {
2734 kiblnd_fail_poolset(&net->ibn_tx_ps[i]->tps_poolset,
2737 if (net->ibn_fmr_ps != NULL)
2738 kiblnd_fail_fmr_poolset(net->ibn_fmr_ps[i],
2743 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2745 if (!list_empty(&zombie_tpo))
2746 kiblnd_destroy_pool_list(&zombie_tpo);
2747 if (!list_empty(&zombie_ppo))
2748 kiblnd_destroy_pool_list(&zombie_ppo);
2749 if (!list_empty(&zombie_fpo))
2750 kiblnd_destroy_fmr_pool_list(&zombie_fpo);
2752 kiblnd_hdev_decref(hdev);
2755 dev->ibd_failed_failover++;
2757 dev->ibd_failed_failover = 0;
2763 kiblnd_destroy_dev (kib_dev_t *dev)
2765 LASSERT (dev->ibd_nnets == 0);
2766 LASSERT(list_empty(&dev->ibd_nets));
2768 list_del(&dev->ibd_fail_list);
2769 list_del(&dev->ibd_list);
2771 if (dev->ibd_hdev != NULL)
2772 kiblnd_hdev_decref(dev->ibd_hdev);
2774 LIBCFS_FREE(dev, sizeof(*dev));
2778 kiblnd_create_dev(char *ifname)
2780 struct net_device *netdev;
2787 rc = lnet_ipif_query(ifname, &up, &ip, &netmask);
2789 CERROR("Can't query IPoIB interface %s: %d\n",
2795 CERROR("Can't query IPoIB interface %s: it's down\n", ifname);
2799 LIBCFS_ALLOC(dev, sizeof(*dev));
2803 netdev = dev_get_by_name(&init_net, ifname);
2804 if (netdev == NULL) {
2805 dev->ibd_can_failover = 0;
2807 dev->ibd_can_failover = !!(netdev->flags & IFF_MASTER);
2811 INIT_LIST_HEAD(&dev->ibd_nets);
2812 INIT_LIST_HEAD(&dev->ibd_list); /* not yet in kib_devs */
2813 INIT_LIST_HEAD(&dev->ibd_fail_list);
2815 strcpy(&dev->ibd_ifname[0], ifname);
2817 /* initialize the device */
2818 rc = kiblnd_dev_failover(dev);
2820 CERROR("Can't initialize device: %d\n", rc);
2821 LIBCFS_FREE(dev, sizeof(*dev));
2825 list_add_tail(&dev->ibd_list,
2826 &kiblnd_data.kib_devs);
2831 kiblnd_base_shutdown(void)
2833 struct kib_sched_info *sched;
2836 LASSERT(list_empty(&kiblnd_data.kib_devs));
2838 CDEBUG(D_MALLOC, "before LND base cleanup: kmem %d\n",
2839 atomic_read(&libcfs_kmemory));
2841 switch (kiblnd_data.kib_init) {
2845 case IBLND_INIT_ALL:
2846 case IBLND_INIT_DATA:
2847 LASSERT (kiblnd_data.kib_peers != NULL);
2848 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
2849 LASSERT(list_empty(&kiblnd_data.kib_peers[i]));
2851 LASSERT(list_empty(&kiblnd_data.kib_connd_zombies));
2852 LASSERT(list_empty(&kiblnd_data.kib_connd_conns));
2853 LASSERT(list_empty(&kiblnd_data.kib_reconn_list));
2854 LASSERT(list_empty(&kiblnd_data.kib_reconn_wait));
2856 /* flag threads to terminate; wake and wait for them to die */
2857 kiblnd_data.kib_shutdown = 1;
2859 /* NB: we really want to stop scheduler threads net by net
2860 * instead of the whole module, this should be improved
2861 * with dynamic configuration LNet */
2862 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds)
2863 wake_up_all(&sched->ibs_waitq);
2865 wake_up_all(&kiblnd_data.kib_connd_waitq);
2866 wake_up_all(&kiblnd_data.kib_failover_waitq);
2869 while (atomic_read(&kiblnd_data.kib_nthreads) != 0) {
2872 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET,
2873 "Waiting for %d threads to terminate\n",
2874 atomic_read(&kiblnd_data.kib_nthreads));
2875 set_current_state(TASK_UNINTERRUPTIBLE);
2876 schedule_timeout(cfs_time_seconds(1));
2881 case IBLND_INIT_NOTHING:
2885 if (kiblnd_data.kib_peers != NULL) {
2886 LIBCFS_FREE(kiblnd_data.kib_peers,
2887 sizeof(struct list_head) *
2888 kiblnd_data.kib_peer_hash_size);
2891 if (kiblnd_data.kib_scheds != NULL)
2892 cfs_percpt_free(kiblnd_data.kib_scheds);
2894 CDEBUG(D_MALLOC, "after LND base cleanup: kmem %d\n",
2895 atomic_read(&libcfs_kmemory));
2897 kiblnd_data.kib_init = IBLND_INIT_NOTHING;
2898 module_put(THIS_MODULE);
2902 kiblnd_shutdown (lnet_ni_t *ni)
2904 kib_net_t *net = ni->ni_data;
2905 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2907 unsigned long flags;
2909 LASSERT(kiblnd_data.kib_init == IBLND_INIT_ALL);
2914 CDEBUG(D_MALLOC, "before LND net cleanup: kmem %d\n",
2915 atomic_read(&libcfs_kmemory));
2917 write_lock_irqsave(g_lock, flags);
2918 net->ibn_shutdown = 1;
2919 write_unlock_irqrestore(g_lock, flags);
2921 switch (net->ibn_init) {
2925 case IBLND_INIT_ALL:
2926 /* nuke all existing peers within this net */
2927 kiblnd_del_peer(ni, LNET_NID_ANY);
2929 /* Wait for all peer state to clean up */
2931 while (atomic_read(&net->ibn_npeers) != 0) {
2934 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET,
2935 "%s: waiting for %d peers to disconnect\n",
2936 libcfs_nid2str(ni->ni_nid),
2937 atomic_read(&net->ibn_npeers));
2938 set_current_state(TASK_UNINTERRUPTIBLE);
2939 schedule_timeout(cfs_time_seconds(1));
2942 kiblnd_net_fini_pools(net);
2944 write_lock_irqsave(g_lock, flags);
2945 LASSERT(net->ibn_dev->ibd_nnets > 0);
2946 net->ibn_dev->ibd_nnets--;
2947 list_del(&net->ibn_list);
2948 write_unlock_irqrestore(g_lock, flags);
2952 case IBLND_INIT_NOTHING:
2953 LASSERT (atomic_read(&net->ibn_nconns) == 0);
2955 if (net->ibn_dev != NULL &&
2956 net->ibn_dev->ibd_nnets == 0)
2957 kiblnd_destroy_dev(net->ibn_dev);
2962 CDEBUG(D_MALLOC, "after LND net cleanup: kmem %d\n",
2963 atomic_read(&libcfs_kmemory));
2965 net->ibn_init = IBLND_INIT_NOTHING;
2968 LIBCFS_FREE(net, sizeof(*net));
2971 if (list_empty(&kiblnd_data.kib_devs))
2972 kiblnd_base_shutdown();
2977 kiblnd_base_startup(void)
2979 struct kib_sched_info *sched;
2983 LASSERT(kiblnd_data.kib_init == IBLND_INIT_NOTHING);
2985 try_module_get(THIS_MODULE);
2986 memset(&kiblnd_data, 0, sizeof(kiblnd_data)); /* zero pointers, flags etc */
2988 rwlock_init(&kiblnd_data.kib_global_lock);
2990 INIT_LIST_HEAD(&kiblnd_data.kib_devs);
2991 INIT_LIST_HEAD(&kiblnd_data.kib_failed_devs);
2993 kiblnd_data.kib_peer_hash_size = IBLND_PEER_HASH_SIZE;
2994 LIBCFS_ALLOC(kiblnd_data.kib_peers,
2995 sizeof(struct list_head) *
2996 kiblnd_data.kib_peer_hash_size);
2997 if (kiblnd_data.kib_peers == NULL)
3000 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++)
3001 INIT_LIST_HEAD(&kiblnd_data.kib_peers[i]);
3003 spin_lock_init(&kiblnd_data.kib_connd_lock);
3004 INIT_LIST_HEAD(&kiblnd_data.kib_connd_conns);
3005 INIT_LIST_HEAD(&kiblnd_data.kib_connd_zombies);
3006 INIT_LIST_HEAD(&kiblnd_data.kib_reconn_list);
3007 INIT_LIST_HEAD(&kiblnd_data.kib_reconn_wait);
3009 init_waitqueue_head(&kiblnd_data.kib_connd_waitq);
3010 init_waitqueue_head(&kiblnd_data.kib_failover_waitq);
3012 kiblnd_data.kib_scheds = cfs_percpt_alloc(lnet_cpt_table(),
3014 if (kiblnd_data.kib_scheds == NULL)
3017 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
3020 spin_lock_init(&sched->ibs_lock);
3021 INIT_LIST_HEAD(&sched->ibs_conns);
3022 init_waitqueue_head(&sched->ibs_waitq);
3024 nthrs = cfs_cpt_weight(lnet_cpt_table(), i);
3025 if (*kiblnd_tunables.kib_nscheds > 0) {
3026 nthrs = min(nthrs, *kiblnd_tunables.kib_nscheds);
3028 /* max to half of CPUs, another half is reserved for
3029 * upper layer modules */
3030 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
3033 sched->ibs_nthreads_max = nthrs;
3037 kiblnd_data.kib_error_qpa.qp_state = IB_QPS_ERR;
3039 /* lists/ptrs/locks initialised */
3040 kiblnd_data.kib_init = IBLND_INIT_DATA;
3041 /*****************************************************/
3043 rc = kiblnd_thread_start(kiblnd_connd, NULL, "kiblnd_connd");
3045 CERROR("Can't spawn o2iblnd connd: %d\n", rc);
3049 if (*kiblnd_tunables.kib_dev_failover != 0)
3050 rc = kiblnd_thread_start(kiblnd_failover_thread, NULL,
3054 CERROR("Can't spawn o2iblnd failover thread: %d\n", rc);
3058 /* flag everything initialised */
3059 kiblnd_data.kib_init = IBLND_INIT_ALL;
3060 /*****************************************************/
3065 kiblnd_base_shutdown();
3070 kiblnd_start_schedulers(struct kib_sched_info *sched)
3076 if (sched->ibs_nthreads == 0) {
3077 if (*kiblnd_tunables.kib_nscheds > 0) {
3078 nthrs = sched->ibs_nthreads_max;
3080 nthrs = cfs_cpt_weight(lnet_cpt_table(),
3082 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
3083 nthrs = min(IBLND_N_SCHED_HIGH, nthrs);
3086 LASSERT(sched->ibs_nthreads <= sched->ibs_nthreads_max);
3087 /* increase one thread if there is new interface */
3088 nthrs = (sched->ibs_nthreads < sched->ibs_nthreads_max);
3091 for (i = 0; i < nthrs; i++) {
3094 id = KIB_THREAD_ID(sched->ibs_cpt, sched->ibs_nthreads + i);
3095 snprintf(name, sizeof(name), "kiblnd_sd_%02ld_%02ld",
3096 KIB_THREAD_CPT(id), KIB_THREAD_TID(id));
3097 rc = kiblnd_thread_start(kiblnd_scheduler, (void *)id, name);
3101 CERROR("Can't spawn thread %d for scheduler[%d]: %d\n",
3102 sched->ibs_cpt, sched->ibs_nthreads + i, rc);
3106 sched->ibs_nthreads += i;
3111 kiblnd_dev_start_threads(kib_dev_t *dev, int newdev, __u32 *cpts, int ncpts)
3117 for (i = 0; i < ncpts; i++) {
3118 struct kib_sched_info *sched;
3120 cpt = (cpts == NULL) ? i : cpts[i];
3121 sched = kiblnd_data.kib_scheds[cpt];
3123 if (!newdev && sched->ibs_nthreads > 0)
3126 rc = kiblnd_start_schedulers(kiblnd_data.kib_scheds[cpt]);
3128 CERROR("Failed to start scheduler threads for %s\n",
3137 kiblnd_dev_search(char *ifname)
3139 kib_dev_t *alias = NULL;
3144 colon = strchr(ifname, ':');
3145 list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) {
3146 if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
3152 colon2 = strchr(dev->ibd_ifname, ':');
3158 if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
3170 kiblnd_startup (lnet_ni_t *ni)
3173 kib_dev_t *ibdev = NULL;
3176 unsigned long flags;
3180 LASSERT (ni->ni_net->net_lnd == &the_o2iblnd);
3182 if (kiblnd_data.kib_init == IBLND_INIT_NOTHING) {
3183 rc = kiblnd_base_startup();
3188 LIBCFS_ALLOC(net, sizeof(*net));
3193 do_gettimeofday(&tv);
3194 net->ibn_incarnation = (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
3196 kiblnd_tunables_setup(ni);
3198 if (ni->ni_interfaces[0] != NULL) {
3199 /* Use the IPoIB interface specified in 'networks=' */
3201 CLASSERT (LNET_MAX_INTERFACES > 1);
3202 if (ni->ni_interfaces[1] != NULL) {
3203 CERROR("Multiple interfaces not supported\n");
3207 ifname = ni->ni_interfaces[0];
3209 ifname = *kiblnd_tunables.kib_default_ipif;
3212 if (strlen(ifname) >= sizeof(ibdev->ibd_ifname)) {
3213 CERROR("IPoIB interface name too long: %s\n", ifname);
3217 ibdev = kiblnd_dev_search(ifname);
3219 newdev = ibdev == NULL;
3220 /* hmm...create kib_dev even for alias */
3221 if (ibdev == NULL || strcmp(&ibdev->ibd_ifname[0], ifname) != 0)
3222 ibdev = kiblnd_create_dev(ifname);
3227 net->ibn_dev = ibdev;
3228 ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid), ibdev->ibd_ifip);
3230 rc = kiblnd_dev_start_threads(ibdev, newdev,
3231 ni->ni_cpts, ni->ni_ncpts);
3235 rc = kiblnd_net_init_pools(net, ni, ni->ni_cpts, ni->ni_ncpts);
3237 CERROR("Failed to initialize NI pools: %d\n", rc);
3241 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
3243 list_add_tail(&net->ibn_list, &ibdev->ibd_nets);
3244 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
3246 net->ibn_init = IBLND_INIT_ALL;
3251 if (net != NULL && net->ibn_dev == NULL && ibdev != NULL)
3252 kiblnd_destroy_dev(ibdev);
3254 kiblnd_shutdown(ni);
3256 CDEBUG(D_NET, "kiblnd_startup failed\n");
3260 static lnd_t the_o2iblnd = {
3261 .lnd_type = O2IBLND,
3262 .lnd_startup = kiblnd_startup,
3263 .lnd_shutdown = kiblnd_shutdown,
3264 .lnd_ctl = kiblnd_ctl,
3265 .lnd_query = kiblnd_query,
3266 .lnd_send = kiblnd_send,
3267 .lnd_recv = kiblnd_recv,
3270 static void __exit ko2iblnd_exit(void)
3272 lnet_unregister_lnd(&the_o2iblnd);
3275 static int __init ko2iblnd_init(void)
3279 CLASSERT(sizeof(kib_msg_t) <= IBLND_MSG_SIZE);
3280 CLASSERT(offsetof(kib_msg_t,
3281 ibm_u.get.ibgm_rd.rd_frags[IBLND_MAX_RDMA_FRAGS]) <=
3283 CLASSERT(offsetof(kib_msg_t,
3284 ibm_u.putack.ibpam_rd.rd_frags[IBLND_MAX_RDMA_FRAGS])
3287 rc = kiblnd_tunables_init();
3291 lnet_register_lnd(&the_o2iblnd);
3296 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3297 MODULE_DESCRIPTION("OpenIB gen2 LNet Network Driver");
3298 MODULE_VERSION("2.8.0");
3299 MODULE_LICENSE("GPL");
3301 module_init(ko2iblnd_init);
3302 module_exit(ko2iblnd_exit);