4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lnet/klnds/o2iblnd/o2iblnd.c
34 * Author: Eric Barton <eric@bartonsoftware.com>
38 #include <linux/inetdevice.h>
42 static struct lnet_lnd the_o2iblnd;
44 struct kib_data kiblnd_data;
47 kiblnd_cksum (void *ptr, int nob)
53 sum = ((sum << 1) | (sum >> 31)) + *c++;
55 /* ensure I don't return 0 (== no checksum) */
56 return (sum == 0) ? 1 : sum;
60 kiblnd_msgtype2str(int type)
63 case IBLND_MSG_CONNREQ:
66 case IBLND_MSG_CONNACK:
72 case IBLND_MSG_IMMEDIATE:
75 case IBLND_MSG_PUT_REQ:
78 case IBLND_MSG_PUT_NAK:
81 case IBLND_MSG_PUT_ACK:
84 case IBLND_MSG_PUT_DONE:
87 case IBLND_MSG_GET_REQ:
90 case IBLND_MSG_GET_DONE:
99 kiblnd_msgtype2size(int type)
101 const int hdr_size = offsetof(struct kib_msg, ibm_u);
104 case IBLND_MSG_CONNREQ:
105 case IBLND_MSG_CONNACK:
106 return hdr_size + sizeof(struct kib_connparams);
111 case IBLND_MSG_IMMEDIATE:
112 return offsetof(struct kib_msg, ibm_u.immediate.ibim_payload[0]);
114 case IBLND_MSG_PUT_REQ:
115 return hdr_size + sizeof(struct kib_putreq_msg);
117 case IBLND_MSG_PUT_ACK:
118 return hdr_size + sizeof(struct kib_putack_msg);
120 case IBLND_MSG_GET_REQ:
121 return hdr_size + sizeof(struct kib_get_msg);
123 case IBLND_MSG_PUT_NAK:
124 case IBLND_MSG_PUT_DONE:
125 case IBLND_MSG_GET_DONE:
126 return hdr_size + sizeof(struct kib_completion_msg);
132 static int kiblnd_unpack_rd(struct kib_msg *msg, int flip)
134 struct kib_rdma_desc *rd;
139 LASSERT (msg->ibm_type == IBLND_MSG_GET_REQ ||
140 msg->ibm_type == IBLND_MSG_PUT_ACK);
142 rd = msg->ibm_type == IBLND_MSG_GET_REQ ?
143 &msg->ibm_u.get.ibgm_rd :
144 &msg->ibm_u.putack.ibpam_rd;
147 __swab32s(&rd->rd_key);
148 __swab32s(&rd->rd_nfrags);
153 if (n <= 0 || n > IBLND_MAX_RDMA_FRAGS) {
154 CERROR("Bad nfrags: %d, should be 0 < n <= %d\n",
155 n, IBLND_MAX_RDMA_FRAGS);
159 nob = offsetof(struct kib_msg, ibm_u) +
160 kiblnd_rd_msg_size(rd, msg->ibm_type, n);
162 if (msg->ibm_nob < nob) {
163 CERROR("Short %s: %d(%d)\n",
164 kiblnd_msgtype2str(msg->ibm_type), msg->ibm_nob, nob);
171 for (i = 0; i < n; i++) {
172 __swab32s(&rd->rd_frags[i].rf_nob);
173 __swab64s(&rd->rd_frags[i].rf_addr);
179 void kiblnd_pack_msg(struct lnet_ni *ni, struct kib_msg *msg, int version,
180 int credits, lnet_nid_t dstnid, __u64 dststamp)
182 struct kib_net *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);
203 int kiblnd_unpack_msg(struct kib_msg *msg, int nob)
205 const int hdr_size = offsetof(struct kib_msg, ibm_u);
211 /* 6 bytes are enough to have received magic + version */
213 CERROR("Short message: %d\n", nob);
217 if (msg->ibm_magic == IBLND_MSG_MAGIC) {
219 } else if (msg->ibm_magic == __swab32(IBLND_MSG_MAGIC)) {
222 CERROR("Bad magic: %08x\n", msg->ibm_magic);
226 version = flip ? __swab16(msg->ibm_version) : msg->ibm_version;
227 if (version != IBLND_MSG_VERSION &&
228 version != IBLND_MSG_VERSION_1) {
229 CERROR("Bad version: %x\n", version);
233 if (nob < hdr_size) {
234 CERROR("Short message: %d\n", nob);
238 msg_nob = flip ? __swab32(msg->ibm_nob) : msg->ibm_nob;
240 CERROR("Short message: got %d, wanted %d\n", nob, msg_nob);
244 /* checksum must be computed with ibm_cksum zero and BEFORE anything
246 msg_cksum = flip ? __swab32(msg->ibm_cksum) : msg->ibm_cksum;
248 if (msg_cksum != 0 &&
249 msg_cksum != kiblnd_cksum(msg, msg_nob)) {
250 CERROR("Bad checksum\n");
254 msg->ibm_cksum = msg_cksum;
257 /* leave magic unflipped as a clue to peer_ni endianness */
258 msg->ibm_version = version;
259 CLASSERT (sizeof(msg->ibm_type) == 1);
260 CLASSERT (sizeof(msg->ibm_credits) == 1);
261 msg->ibm_nob = msg_nob;
262 __swab64s(&msg->ibm_srcnid);
263 __swab64s(&msg->ibm_srcstamp);
264 __swab64s(&msg->ibm_dstnid);
265 __swab64s(&msg->ibm_dststamp);
268 if (msg->ibm_srcnid == LNET_NID_ANY) {
269 CERROR("Bad src nid: %s\n", libcfs_nid2str(msg->ibm_srcnid));
273 if (msg_nob < kiblnd_msgtype2size(msg->ibm_type)) {
274 CERROR("Short %s: %d(%d)\n", kiblnd_msgtype2str(msg->ibm_type),
275 msg_nob, kiblnd_msgtype2size(msg->ibm_type));
279 switch (msg->ibm_type) {
281 CERROR("Unknown message type %x\n", msg->ibm_type);
285 case IBLND_MSG_IMMEDIATE:
286 case IBLND_MSG_PUT_REQ:
289 case IBLND_MSG_PUT_ACK:
290 case IBLND_MSG_GET_REQ:
291 if (kiblnd_unpack_rd(msg, flip))
295 case IBLND_MSG_PUT_NAK:
296 case IBLND_MSG_PUT_DONE:
297 case IBLND_MSG_GET_DONE:
299 __swab32s(&msg->ibm_u.completion.ibcm_status);
302 case IBLND_MSG_CONNREQ:
303 case IBLND_MSG_CONNACK:
305 __swab16s(&msg->ibm_u.connparams.ibcp_queue_depth);
306 __swab16s(&msg->ibm_u.connparams.ibcp_max_frags);
307 __swab32s(&msg->ibm_u.connparams.ibcp_max_msg_size);
315 kiblnd_create_peer(struct lnet_ni *ni, struct kib_peer_ni **peerp,
318 struct kib_peer_ni *peer_ni;
319 struct kib_net *net = ni->ni_data;
320 int cpt = lnet_cpt_of_nid(nid, ni);
323 LASSERT(net != NULL);
324 LASSERT(nid != LNET_NID_ANY);
326 LIBCFS_CPT_ALLOC(peer_ni, lnet_cpt_table(), cpt, sizeof(*peer_ni));
327 if (peer_ni == NULL) {
328 CERROR("Cannot allocate peer_ni\n");
332 peer_ni->ibp_ni = ni;
333 peer_ni->ibp_nid = nid;
334 peer_ni->ibp_error = 0;
335 peer_ni->ibp_last_alive = 0;
336 peer_ni->ibp_max_frags = IBLND_MAX_RDMA_FRAGS;
337 peer_ni->ibp_queue_depth = ni->ni_net->net_tunables.lct_peer_tx_credits;
338 atomic_set(&peer_ni->ibp_refcount, 1); /* 1 ref for caller */
340 INIT_LIST_HEAD(&peer_ni->ibp_list); /* not in the peer_ni table yet */
341 INIT_LIST_HEAD(&peer_ni->ibp_conns);
342 INIT_LIST_HEAD(&peer_ni->ibp_tx_queue);
344 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
346 /* always called with a ref on ni, which prevents ni being shutdown */
347 LASSERT(net->ibn_shutdown == 0);
349 /* npeers only grows with the global lock held */
350 atomic_inc(&net->ibn_npeers);
352 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
359 kiblnd_destroy_peer(struct kib_peer_ni *peer_ni)
361 struct kib_net *net = peer_ni->ibp_ni->ni_data;
363 LASSERT(net != NULL);
364 LASSERT (atomic_read(&peer_ni->ibp_refcount) == 0);
365 LASSERT(!kiblnd_peer_active(peer_ni));
366 LASSERT(kiblnd_peer_idle(peer_ni));
367 LASSERT(list_empty(&peer_ni->ibp_tx_queue));
369 LIBCFS_FREE(peer_ni, sizeof(*peer_ni));
371 /* NB a peer_ni's connections keep a reference on their peer_ni until
372 * they are destroyed, so we can be assured that _all_ state to do
373 * with this peer_ni has been cleaned up when its refcount drops to
375 atomic_dec(&net->ibn_npeers);
379 kiblnd_find_peer_locked(struct lnet_ni *ni, lnet_nid_t nid)
381 /* the caller is responsible for accounting the additional reference
382 * that this creates */
383 struct list_head *peer_list = kiblnd_nid2peerlist(nid);
384 struct list_head *tmp;
385 struct kib_peer_ni *peer_ni;
387 list_for_each(tmp, peer_list) {
389 peer_ni = list_entry(tmp, struct kib_peer_ni, ibp_list);
390 LASSERT(!kiblnd_peer_idle(peer_ni));
393 * Match a peer if its NID and the NID of the local NI it
394 * communicates over are the same. Otherwise don't match
395 * the peer, which will result in a new lnd peer being
398 if (peer_ni->ibp_nid != nid ||
399 peer_ni->ibp_ni->ni_nid != ni->ni_nid)
402 CDEBUG(D_NET, "got peer_ni [%p] -> %s (%d) version: %x\n",
403 peer_ni, libcfs_nid2str(nid),
404 atomic_read(&peer_ni->ibp_refcount),
405 peer_ni->ibp_version);
412 kiblnd_unlink_peer_locked(struct kib_peer_ni *peer_ni)
414 LASSERT(list_empty(&peer_ni->ibp_conns));
416 LASSERT (kiblnd_peer_active(peer_ni));
417 list_del_init(&peer_ni->ibp_list);
418 /* lose peerlist's ref */
419 kiblnd_peer_decref(peer_ni);
423 kiblnd_get_peer_info(struct lnet_ni *ni, int index,
424 lnet_nid_t *nidp, int *count)
426 struct kib_peer_ni *peer_ni;
427 struct list_head *ptmp;
431 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
433 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
435 list_for_each(ptmp, &kiblnd_data.kib_peers[i]) {
437 peer_ni = list_entry(ptmp, struct kib_peer_ni, ibp_list);
438 LASSERT(!kiblnd_peer_idle(peer_ni));
440 if (peer_ni->ibp_ni != ni)
446 *nidp = peer_ni->ibp_nid;
447 *count = atomic_read(&peer_ni->ibp_refcount);
449 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
455 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
460 kiblnd_del_peer_locked(struct kib_peer_ni *peer_ni)
462 struct list_head *ctmp;
463 struct list_head *cnxt;
464 struct kib_conn *conn;
466 if (list_empty(&peer_ni->ibp_conns)) {
467 kiblnd_unlink_peer_locked(peer_ni);
469 list_for_each_safe(ctmp, cnxt, &peer_ni->ibp_conns) {
470 conn = list_entry(ctmp, struct kib_conn, ibc_list);
472 kiblnd_close_conn_locked(conn, 0);
474 /* NB closing peer_ni's last conn unlinked it. */
476 /* NB peer_ni now unlinked; might even be freed if the peer_ni table had the
481 kiblnd_del_peer(struct lnet_ni *ni, lnet_nid_t nid)
483 struct list_head zombies = LIST_HEAD_INIT(zombies);
484 struct list_head *ptmp;
485 struct list_head *pnxt;
486 struct kib_peer_ni *peer_ni;
493 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
495 if (nid != LNET_NID_ANY) {
496 lo = hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
499 hi = kiblnd_data.kib_peer_hash_size - 1;
502 for (i = lo; i <= hi; i++) {
503 list_for_each_safe(ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
504 peer_ni = list_entry(ptmp, struct kib_peer_ni, ibp_list);
505 LASSERT(!kiblnd_peer_idle(peer_ni));
507 if (peer_ni->ibp_ni != ni)
510 if (!(nid == LNET_NID_ANY || peer_ni->ibp_nid == nid))
513 if (!list_empty(&peer_ni->ibp_tx_queue)) {
514 LASSERT(list_empty(&peer_ni->ibp_conns));
516 list_splice_init(&peer_ni->ibp_tx_queue,
520 kiblnd_del_peer_locked(peer_ni);
521 rc = 0; /* matched something */
525 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
527 kiblnd_txlist_done(&zombies, -EIO, LNET_MSG_STATUS_LOCAL_ERROR);
532 static struct kib_conn *
533 kiblnd_get_conn_by_idx(struct lnet_ni *ni, int index)
535 struct kib_peer_ni *peer_ni;
536 struct list_head *ptmp;
537 struct kib_conn *conn;
538 struct list_head *ctmp;
542 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
544 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
545 list_for_each(ptmp, &kiblnd_data.kib_peers[i]) {
547 peer_ni = list_entry(ptmp, struct kib_peer_ni, ibp_list);
548 LASSERT(!kiblnd_peer_idle(peer_ni));
550 if (peer_ni->ibp_ni != ni)
553 list_for_each(ctmp, &peer_ni->ibp_conns) {
557 conn = list_entry(ctmp, struct kib_conn, ibc_list);
558 kiblnd_conn_addref(conn);
559 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
566 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
571 kiblnd_debug_rx(struct kib_rx *rx)
573 CDEBUG(D_CONSOLE, " %p status %d msg_type %x cred %d\n",
574 rx, rx->rx_status, rx->rx_msg->ibm_type,
575 rx->rx_msg->ibm_credits);
579 kiblnd_debug_tx(struct kib_tx *tx)
581 CDEBUG(D_CONSOLE, " %p snd %d q %d w %d rc %d dl %lld "
582 "cookie %#llx msg %s%s type %x cred %d\n",
583 tx, tx->tx_sending, tx->tx_queued, tx->tx_waiting,
584 tx->tx_status, ktime_to_ns(tx->tx_deadline), tx->tx_cookie,
585 tx->tx_lntmsg[0] == NULL ? "-" : "!",
586 tx->tx_lntmsg[1] == NULL ? "-" : "!",
587 tx->tx_msg->ibm_type, tx->tx_msg->ibm_credits);
591 kiblnd_debug_conn(struct kib_conn *conn)
593 struct list_head *tmp;
596 spin_lock(&conn->ibc_lock);
598 CDEBUG(D_CONSOLE, "conn[%d] %p [version %x] -> %s:\n",
599 atomic_read(&conn->ibc_refcount), conn,
600 conn->ibc_version, libcfs_nid2str(conn->ibc_peer->ibp_nid));
601 CDEBUG(D_CONSOLE, " state %d nposted %d/%d cred %d o_cred %d "
602 " r_cred %d\n", conn->ibc_state, conn->ibc_noops_posted,
603 conn->ibc_nsends_posted, conn->ibc_credits,
604 conn->ibc_outstanding_credits, conn->ibc_reserved_credits);
605 CDEBUG(D_CONSOLE, " comms_err %d\n", conn->ibc_comms_error);
607 CDEBUG(D_CONSOLE, " early_rxs:\n");
608 list_for_each(tmp, &conn->ibc_early_rxs)
609 kiblnd_debug_rx(list_entry(tmp, struct kib_rx, rx_list));
611 CDEBUG(D_CONSOLE, " tx_noops:\n");
612 list_for_each(tmp, &conn->ibc_tx_noops)
613 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
615 CDEBUG(D_CONSOLE, " tx_queue_nocred:\n");
616 list_for_each(tmp, &conn->ibc_tx_queue_nocred)
617 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
619 CDEBUG(D_CONSOLE, " tx_queue_rsrvd:\n");
620 list_for_each(tmp, &conn->ibc_tx_queue_rsrvd)
621 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
623 CDEBUG(D_CONSOLE, " tx_queue:\n");
624 list_for_each(tmp, &conn->ibc_tx_queue)
625 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
627 CDEBUG(D_CONSOLE, " active_txs:\n");
628 list_for_each(tmp, &conn->ibc_active_txs)
629 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
631 CDEBUG(D_CONSOLE, " rxs:\n");
632 for (i = 0; i < IBLND_RX_MSGS(conn); i++)
633 kiblnd_debug_rx(&conn->ibc_rxs[i]);
635 spin_unlock(&conn->ibc_lock);
639 kiblnd_translate_mtu(int value)
660 kiblnd_setup_mtu_locked(struct rdma_cm_id *cmid)
664 /* XXX There is no path record for iWARP, set by netdev->change_mtu? */
665 if (cmid->route.path_rec == NULL)
668 mtu = kiblnd_translate_mtu(*kiblnd_tunables.kib_ib_mtu);
671 cmid->route.path_rec->mtu = mtu;
675 kiblnd_get_completion_vector(struct kib_conn *conn, int cpt)
683 vectors = conn->ibc_cmid->device->num_comp_vectors;
687 mask = cfs_cpt_cpumask(lnet_cpt_table(), cpt);
689 /* hash NID to CPU id in this partition... */
690 ibp_nid = conn->ibc_peer->ibp_nid;
691 off = do_div(ibp_nid, cpumask_weight(mask));
692 for_each_cpu(i, mask) {
702 * Get the scheduler bound to this CPT. If the scheduler has no
703 * threads, which means that the CPT has no CPUs, then grab the
704 * next scheduler that we can use.
706 * This case would be triggered if a NUMA node is configured with
707 * no associated CPUs.
709 static struct kib_sched_info *
710 kiblnd_get_scheduler(int cpt)
712 struct kib_sched_info *sched;
715 sched = kiblnd_data.kib_scheds[cpt];
717 if (sched->ibs_nthreads > 0)
720 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
721 if (sched->ibs_nthreads > 0) {
722 CDEBUG(D_NET, "scheduler[%d] has no threads. selected scheduler[%d]\n",
723 cpt, sched->ibs_cpt);
731 static unsigned int kiblnd_send_wrs(struct kib_conn *conn)
734 * One WR for the LNet message
735 * And ibc_max_frags for the transfer WRs
737 unsigned int ret = 1 + conn->ibc_max_frags;
738 enum kib_dev_caps dev_caps = conn->ibc_hdev->ibh_dev->ibd_dev_caps;
740 /* FastReg needs two extra WRs for map and invalidate */
741 if (dev_caps & IBLND_DEV_CAPS_FASTREG_ENABLED)
744 /* account for a maximum of ibc_queue_depth in-flight transfers */
745 ret *= conn->ibc_queue_depth;
750 kiblnd_create_conn(struct kib_peer_ni *peer_ni, struct rdma_cm_id *cmid,
751 int state, int version)
754 * If the new conn is created successfully it takes over the caller's
755 * ref on 'peer_ni'. It also "owns" 'cmid' and destroys it when it itself
756 * is destroyed. On failure, the caller's ref on 'peer_ni' remains and
757 * she must dispose of 'cmid'. (Actually I'd block forever if I tried
758 * to destroy 'cmid' here since I'm called from the CM which still has
759 * its ref on 'cmid'). */
760 rwlock_t *glock = &kiblnd_data.kib_global_lock;
761 struct kib_net *net = peer_ni->ibp_ni->ni_data;
763 struct ib_qp_init_attr *init_qp_attr;
764 struct kib_sched_info *sched;
765 #ifdef HAVE_IB_CQ_INIT_ATTR
766 struct ib_cq_init_attr cq_attr = {};
768 struct kib_conn *conn;
775 LASSERT(net != NULL);
776 LASSERT(!in_interrupt());
780 cpt = lnet_cpt_of_nid(peer_ni->ibp_nid, peer_ni->ibp_ni);
781 sched = kiblnd_get_scheduler(cpt);
784 CERROR("no schedulers available. node is unhealthy\n");
789 * The cpt might have changed if we ended up selecting a non cpt
790 * native scheduler. So use the scheduler's cpt instead.
792 cpt = sched->ibs_cpt;
794 LIBCFS_CPT_ALLOC(init_qp_attr, lnet_cpt_table(), cpt,
795 sizeof(*init_qp_attr));
796 if (init_qp_attr == NULL) {
797 CERROR("Can't allocate qp_attr for %s\n",
798 libcfs_nid2str(peer_ni->ibp_nid));
802 LIBCFS_CPT_ALLOC(conn, lnet_cpt_table(), cpt, sizeof(*conn));
804 CERROR("Can't allocate connection for %s\n",
805 libcfs_nid2str(peer_ni->ibp_nid));
809 conn->ibc_state = IBLND_CONN_INIT;
810 conn->ibc_version = version;
811 conn->ibc_peer = peer_ni; /* I take the caller's ref */
812 cmid->context = conn; /* for future CM callbacks */
813 conn->ibc_cmid = cmid;
814 conn->ibc_max_frags = peer_ni->ibp_max_frags;
815 conn->ibc_queue_depth = peer_ni->ibp_queue_depth;
816 conn->ibc_rxs = NULL;
817 conn->ibc_rx_pages = NULL;
819 INIT_LIST_HEAD(&conn->ibc_early_rxs);
820 INIT_LIST_HEAD(&conn->ibc_tx_noops);
821 INIT_LIST_HEAD(&conn->ibc_tx_queue);
822 INIT_LIST_HEAD(&conn->ibc_tx_queue_rsrvd);
823 INIT_LIST_HEAD(&conn->ibc_tx_queue_nocred);
824 INIT_LIST_HEAD(&conn->ibc_active_txs);
825 INIT_LIST_HEAD(&conn->ibc_zombie_txs);
826 spin_lock_init(&conn->ibc_lock);
828 LIBCFS_CPT_ALLOC(conn->ibc_connvars, lnet_cpt_table(), cpt,
829 sizeof(*conn->ibc_connvars));
830 if (conn->ibc_connvars == NULL) {
831 CERROR("Can't allocate in-progress connection state\n");
835 write_lock_irqsave(glock, flags);
836 if (dev->ibd_failover) {
837 write_unlock_irqrestore(glock, flags);
838 CERROR("%s: failover in progress\n", dev->ibd_ifname);
842 if (dev->ibd_hdev->ibh_ibdev != cmid->device) {
843 /* wakeup failover thread and teardown connection */
844 if (kiblnd_dev_can_failover(dev)) {
845 list_add_tail(&dev->ibd_fail_list,
846 &kiblnd_data.kib_failed_devs);
847 wake_up(&kiblnd_data.kib_failover_waitq);
850 write_unlock_irqrestore(glock, flags);
851 CERROR("cmid HCA(%s), kib_dev(%s) need failover\n",
852 cmid->device->name, dev->ibd_ifname);
856 kiblnd_hdev_addref_locked(dev->ibd_hdev);
857 conn->ibc_hdev = dev->ibd_hdev;
859 kiblnd_setup_mtu_locked(cmid);
861 write_unlock_irqrestore(glock, flags);
863 #ifdef HAVE_IB_CQ_INIT_ATTR
864 cq_attr.cqe = IBLND_CQ_ENTRIES(conn);
865 cq_attr.comp_vector = kiblnd_get_completion_vector(conn, cpt);
866 cq = ib_create_cq(cmid->device,
867 kiblnd_cq_completion, kiblnd_cq_event, conn,
870 cq = ib_create_cq(cmid->device,
871 kiblnd_cq_completion, kiblnd_cq_event, conn,
872 IBLND_CQ_ENTRIES(conn),
873 kiblnd_get_completion_vector(conn, cpt));
877 * on MLX-5 (possibly MLX-4 as well) this error could be
878 * hit if the concurrent_sends and/or peer_tx_credits is set
879 * too high. Or due to an MLX-5 bug which tries to
880 * allocate 256kb via kmalloc for WR cookie array
882 CERROR("Failed to create CQ with %d CQEs: %ld\n",
883 IBLND_CQ_ENTRIES(conn), PTR_ERR(cq));
889 rc = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
891 CERROR("Can't request completion notification: %d\n", rc);
895 init_qp_attr->event_handler = kiblnd_qp_event;
896 init_qp_attr->qp_context = conn;
897 init_qp_attr->cap.max_send_sge = *kiblnd_tunables.kib_wrq_sge;
898 init_qp_attr->cap.max_recv_sge = 1;
899 init_qp_attr->sq_sig_type = IB_SIGNAL_REQ_WR;
900 init_qp_attr->qp_type = IB_QPT_RC;
901 init_qp_attr->send_cq = cq;
902 init_qp_attr->recv_cq = cq;
904 conn->ibc_sched = sched;
907 init_qp_attr->cap.max_send_wr = kiblnd_send_wrs(conn);
908 init_qp_attr->cap.max_recv_wr = IBLND_RECV_WRS(conn);
910 rc = rdma_create_qp(cmid, conn->ibc_hdev->ibh_pd, init_qp_attr);
911 if (!rc || conn->ibc_queue_depth < 2)
914 conn->ibc_queue_depth--;
918 CERROR("Can't create QP: %d, send_wr: %d, recv_wr: %d, "
919 "send_sge: %d, recv_sge: %d\n",
920 rc, init_qp_attr->cap.max_send_wr,
921 init_qp_attr->cap.max_recv_wr,
922 init_qp_attr->cap.max_send_sge,
923 init_qp_attr->cap.max_recv_sge);
927 if (conn->ibc_queue_depth != peer_ni->ibp_queue_depth)
928 CWARN("peer %s - queue depth reduced from %u to %u"
929 " to allow for qp creation\n",
930 libcfs_nid2str(peer_ni->ibp_nid),
931 peer_ni->ibp_queue_depth,
932 conn->ibc_queue_depth);
934 LIBCFS_CPT_ALLOC(conn->ibc_rxs, lnet_cpt_table(), cpt,
935 IBLND_RX_MSGS(conn) * sizeof(struct kib_rx));
936 if (conn->ibc_rxs == NULL) {
937 CERROR("Cannot allocate RX buffers\n");
941 rc = kiblnd_alloc_pages(&conn->ibc_rx_pages, cpt,
942 IBLND_RX_MSG_PAGES(conn));
946 kiblnd_map_rx_descs(conn);
948 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
950 /* 1 ref for caller and each rxmsg */
951 atomic_set(&conn->ibc_refcount, 1 + IBLND_RX_MSGS(conn));
952 conn->ibc_nrx = IBLND_RX_MSGS(conn);
955 for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
956 rc = kiblnd_post_rx(&conn->ibc_rxs[i], IBLND_POSTRX_NO_CREDIT);
958 CERROR("Can't post rxmsg: %d\n", rc);
960 /* Make posted receives complete */
961 kiblnd_abort_receives(conn);
963 /* correct # of posted buffers
964 * NB locking needed now I'm racing with completion */
965 spin_lock_irqsave(&sched->ibs_lock, flags);
966 conn->ibc_nrx -= IBLND_RX_MSGS(conn) - i;
967 spin_unlock_irqrestore(&sched->ibs_lock, flags);
969 /* cmid will be destroyed by CM(ofed) after cm_callback
970 * returned, so we can't refer it anymore
971 * (by kiblnd_connd()->kiblnd_destroy_conn) */
972 rdma_destroy_qp(conn->ibc_cmid);
973 conn->ibc_cmid = NULL;
975 /* Drop my own and unused rxbuffer refcounts */
976 while (i++ <= IBLND_RX_MSGS(conn))
977 kiblnd_conn_decref(conn);
983 /* Init successful! */
984 LASSERT (state == IBLND_CONN_ACTIVE_CONNECT ||
985 state == IBLND_CONN_PASSIVE_WAIT);
986 conn->ibc_state = state;
989 atomic_inc(&net->ibn_nconns);
993 kiblnd_destroy_conn(conn);
994 LIBCFS_FREE(conn, sizeof(*conn));
996 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
1002 kiblnd_destroy_conn(struct kib_conn *conn)
1004 struct rdma_cm_id *cmid = conn->ibc_cmid;
1005 struct kib_peer_ni *peer_ni = conn->ibc_peer;
1008 LASSERT (!in_interrupt());
1009 LASSERT (atomic_read(&conn->ibc_refcount) == 0);
1010 LASSERT(list_empty(&conn->ibc_early_rxs));
1011 LASSERT(list_empty(&conn->ibc_tx_noops));
1012 LASSERT(list_empty(&conn->ibc_tx_queue));
1013 LASSERT(list_empty(&conn->ibc_tx_queue_rsrvd));
1014 LASSERT(list_empty(&conn->ibc_tx_queue_nocred));
1015 LASSERT(list_empty(&conn->ibc_active_txs));
1016 LASSERT (conn->ibc_noops_posted == 0);
1017 LASSERT (conn->ibc_nsends_posted == 0);
1019 switch (conn->ibc_state) {
1021 /* conn must be completely disengaged from the network */
1024 case IBLND_CONN_DISCONNECTED:
1025 /* connvars should have been freed already */
1026 LASSERT (conn->ibc_connvars == NULL);
1029 case IBLND_CONN_INIT:
1033 /* conn->ibc_cmid might be destroyed by CM already */
1034 if (cmid != NULL && cmid->qp != NULL)
1035 rdma_destroy_qp(cmid);
1037 if (conn->ibc_cq != NULL) {
1038 rc = ib_destroy_cq(conn->ibc_cq);
1040 CWARN("Error destroying CQ: %d\n", rc);
1043 kiblnd_txlist_done(&conn->ibc_zombie_txs, -ECONNABORTED,
1044 LNET_MSG_STATUS_OK);
1046 if (conn->ibc_rx_pages != NULL)
1047 kiblnd_unmap_rx_descs(conn);
1049 if (conn->ibc_rxs != NULL) {
1050 LIBCFS_FREE(conn->ibc_rxs,
1051 IBLND_RX_MSGS(conn) * sizeof(struct kib_rx));
1054 if (conn->ibc_connvars != NULL)
1055 LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
1057 if (conn->ibc_hdev != NULL)
1058 kiblnd_hdev_decref(conn->ibc_hdev);
1060 /* See CAVEAT EMPTOR above in kiblnd_create_conn */
1061 if (conn->ibc_state != IBLND_CONN_INIT) {
1062 struct kib_net *net = peer_ni->ibp_ni->ni_data;
1064 kiblnd_peer_decref(peer_ni);
1065 rdma_destroy_id(cmid);
1066 atomic_dec(&net->ibn_nconns);
1071 kiblnd_close_peer_conns_locked(struct kib_peer_ni *peer_ni, int why)
1073 struct kib_conn *conn;
1074 struct list_head *ctmp;
1075 struct list_head *cnxt;
1078 list_for_each_safe(ctmp, cnxt, &peer_ni->ibp_conns) {
1079 conn = list_entry(ctmp, struct kib_conn, ibc_list);
1081 CDEBUG(D_NET, "Closing conn -> %s, "
1082 "version: %x, reason: %d\n",
1083 libcfs_nid2str(peer_ni->ibp_nid),
1084 conn->ibc_version, why);
1086 kiblnd_close_conn_locked(conn, why);
1094 kiblnd_close_stale_conns_locked(struct kib_peer_ni *peer_ni,
1095 int version, __u64 incarnation)
1097 struct kib_conn *conn;
1098 struct list_head *ctmp;
1099 struct list_head *cnxt;
1102 list_for_each_safe(ctmp, cnxt, &peer_ni->ibp_conns) {
1103 conn = list_entry(ctmp, struct kib_conn, ibc_list);
1105 if (conn->ibc_version == version &&
1106 conn->ibc_incarnation == incarnation)
1109 CDEBUG(D_NET, "Closing stale conn -> %s version: %x, "
1110 "incarnation:%#llx(%x, %#llx)\n",
1111 libcfs_nid2str(peer_ni->ibp_nid),
1112 conn->ibc_version, conn->ibc_incarnation,
1113 version, incarnation);
1115 kiblnd_close_conn_locked(conn, -ESTALE);
1123 kiblnd_close_matching_conns(struct lnet_ni *ni, lnet_nid_t nid)
1125 struct kib_peer_ni *peer_ni;
1126 struct list_head *ptmp;
1127 struct list_head *pnxt;
1131 unsigned long flags;
1134 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1136 if (nid != LNET_NID_ANY)
1137 lo = hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
1140 hi = kiblnd_data.kib_peer_hash_size - 1;
1143 for (i = lo; i <= hi; i++) {
1144 list_for_each_safe(ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
1146 peer_ni = list_entry(ptmp, struct kib_peer_ni, ibp_list);
1147 LASSERT(!kiblnd_peer_idle(peer_ni));
1149 if (peer_ni->ibp_ni != ni)
1152 if (!(nid == LNET_NID_ANY || nid == peer_ni->ibp_nid))
1155 count += kiblnd_close_peer_conns_locked(peer_ni, 0);
1159 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1161 /* wildcards always succeed */
1162 if (nid == LNET_NID_ANY)
1165 return (count == 0) ? -ENOENT : 0;
1169 kiblnd_ctl(struct lnet_ni *ni, unsigned int cmd, void *arg)
1171 struct libcfs_ioctl_data *data = arg;
1175 case IOC_LIBCFS_GET_PEER: {
1179 rc = kiblnd_get_peer_info(ni, data->ioc_count,
1181 data->ioc_nid = nid;
1182 data->ioc_count = count;
1186 case IOC_LIBCFS_DEL_PEER: {
1187 rc = kiblnd_del_peer(ni, data->ioc_nid);
1190 case IOC_LIBCFS_GET_CONN: {
1191 struct kib_conn *conn;
1194 conn = kiblnd_get_conn_by_idx(ni, data->ioc_count);
1200 LASSERT(conn->ibc_cmid != NULL);
1201 data->ioc_nid = conn->ibc_peer->ibp_nid;
1202 if (conn->ibc_cmid->route.path_rec == NULL)
1203 data->ioc_u32[0] = 0; /* iWarp has no path MTU */
1206 ib_mtu_enum_to_int(conn->ibc_cmid->route.path_rec->mtu);
1207 kiblnd_conn_decref(conn);
1210 case IOC_LIBCFS_CLOSE_CONNECTION: {
1211 rc = kiblnd_close_matching_conns(ni, data->ioc_nid);
1223 kiblnd_query(struct lnet_ni *ni, lnet_nid_t nid, time64_t *when)
1225 time64_t last_alive = 0;
1226 time64_t now = ktime_get_seconds();
1227 rwlock_t *glock = &kiblnd_data.kib_global_lock;
1228 struct kib_peer_ni *peer_ni;
1229 unsigned long flags;
1231 read_lock_irqsave(glock, flags);
1233 peer_ni = kiblnd_find_peer_locked(ni, nid);
1234 if (peer_ni != NULL)
1235 last_alive = peer_ni->ibp_last_alive;
1237 read_unlock_irqrestore(glock, flags);
1239 if (last_alive != 0)
1242 /* peer_ni is not persistent in hash, trigger peer_ni creation
1243 * and connection establishment with a NULL tx */
1244 if (peer_ni == NULL)
1245 kiblnd_launch_tx(ni, NULL, nid);
1247 CDEBUG(D_NET, "peer_ni %s %p, alive %lld secs ago\n",
1248 libcfs_nid2str(nid), peer_ni,
1249 last_alive ? now - last_alive : -1);
1254 kiblnd_free_pages(struct kib_pages *p)
1256 int npages = p->ibp_npages;
1259 for (i = 0; i < npages; i++) {
1260 if (p->ibp_pages[i] != NULL)
1261 __free_page(p->ibp_pages[i]);
1264 LIBCFS_FREE(p, offsetof(struct kib_pages, ibp_pages[npages]));
1268 kiblnd_alloc_pages(struct kib_pages **pp, int cpt, int npages)
1270 struct kib_pages *p;
1273 LIBCFS_CPT_ALLOC(p, lnet_cpt_table(), cpt,
1274 offsetof(struct kib_pages, ibp_pages[npages]));
1276 CERROR("Can't allocate descriptor for %d pages\n", npages);
1280 memset(p, 0, offsetof(struct kib_pages, ibp_pages[npages]));
1281 p->ibp_npages = npages;
1283 for (i = 0; i < npages; i++) {
1284 p->ibp_pages[i] = cfs_page_cpt_alloc(lnet_cpt_table(), cpt,
1286 if (p->ibp_pages[i] == NULL) {
1287 CERROR("Can't allocate page %d of %d\n", i, npages);
1288 kiblnd_free_pages(p);
1298 kiblnd_unmap_rx_descs(struct kib_conn *conn)
1303 LASSERT (conn->ibc_rxs != NULL);
1304 LASSERT (conn->ibc_hdev != NULL);
1306 for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
1307 rx = &conn->ibc_rxs[i];
1309 LASSERT(rx->rx_nob >= 0); /* not posted */
1311 kiblnd_dma_unmap_single(conn->ibc_hdev->ibh_ibdev,
1312 KIBLND_UNMAP_ADDR(rx, rx_msgunmap,
1314 IBLND_MSG_SIZE, DMA_FROM_DEVICE);
1317 kiblnd_free_pages(conn->ibc_rx_pages);
1319 conn->ibc_rx_pages = NULL;
1323 kiblnd_map_rx_descs(struct kib_conn *conn)
1331 for (pg_off = ipg = i = 0; i < IBLND_RX_MSGS(conn); i++) {
1332 pg = conn->ibc_rx_pages->ibp_pages[ipg];
1333 rx = &conn->ibc_rxs[i];
1336 rx->rx_msg = (struct kib_msg *)(((char *)page_address(pg)) + pg_off);
1339 kiblnd_dma_map_single(conn->ibc_hdev->ibh_ibdev,
1340 rx->rx_msg, IBLND_MSG_SIZE,
1342 LASSERT(!kiblnd_dma_mapping_error(conn->ibc_hdev->ibh_ibdev,
1344 KIBLND_UNMAP_ADDR_SET(rx, rx_msgunmap, rx->rx_msgaddr);
1346 CDEBUG(D_NET, "rx %d: %p %#llx(%#llx)\n",
1347 i, rx->rx_msg, rx->rx_msgaddr,
1348 (__u64)(page_to_phys(pg) + pg_off));
1350 pg_off += IBLND_MSG_SIZE;
1351 LASSERT(pg_off <= PAGE_SIZE);
1353 if (pg_off == PAGE_SIZE) {
1356 LASSERT(ipg <= IBLND_RX_MSG_PAGES(conn));
1362 kiblnd_unmap_tx_pool(struct kib_tx_pool *tpo)
1364 struct kib_hca_dev *hdev = tpo->tpo_hdev;
1368 LASSERT (tpo->tpo_pool.po_allocated == 0);
1373 for (i = 0; i < tpo->tpo_pool.po_size; i++) {
1374 tx = &tpo->tpo_tx_descs[i];
1375 kiblnd_dma_unmap_single(hdev->ibh_ibdev,
1376 KIBLND_UNMAP_ADDR(tx, tx_msgunmap,
1378 IBLND_MSG_SIZE, DMA_TO_DEVICE);
1381 kiblnd_hdev_decref(hdev);
1382 tpo->tpo_hdev = NULL;
1385 static struct kib_hca_dev *
1386 kiblnd_current_hdev(struct kib_dev *dev)
1388 struct kib_hca_dev *hdev;
1389 unsigned long flags;
1392 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1393 while (dev->ibd_failover) {
1394 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1396 CDEBUG(D_NET, "%s: Wait for failover\n",
1398 set_current_state(TASK_INTERRUPTIBLE);
1399 schedule_timeout(cfs_time_seconds(1) / 100);
1401 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1404 kiblnd_hdev_addref_locked(dev->ibd_hdev);
1405 hdev = dev->ibd_hdev;
1407 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1413 kiblnd_map_tx_pool(struct kib_tx_pool *tpo)
1415 struct kib_pages *txpgs = tpo->tpo_tx_pages;
1416 struct kib_pool *pool = &tpo->tpo_pool;
1417 struct kib_net *net = pool->po_owner->ps_net;
1418 struct kib_dev *dev;
1425 LASSERT (net != NULL);
1429 /* pre-mapped messages are not bigger than 1 page */
1430 CLASSERT (IBLND_MSG_SIZE <= PAGE_SIZE);
1432 /* No fancy arithmetic when we do the buffer calculations */
1433 CLASSERT (PAGE_SIZE % IBLND_MSG_SIZE == 0);
1435 tpo->tpo_hdev = kiblnd_current_hdev(dev);
1437 for (ipage = page_offset = i = 0; i < pool->po_size; i++) {
1438 page = txpgs->ibp_pages[ipage];
1439 tx = &tpo->tpo_tx_descs[i];
1441 tx->tx_msg = (struct kib_msg *)(((char *)page_address(page)) +
1444 tx->tx_msgaddr = kiblnd_dma_map_single(tpo->tpo_hdev->ibh_ibdev,
1448 LASSERT(!kiblnd_dma_mapping_error(tpo->tpo_hdev->ibh_ibdev,
1450 KIBLND_UNMAP_ADDR_SET(tx, tx_msgunmap, tx->tx_msgaddr);
1452 list_add(&tx->tx_list, &pool->po_free_list);
1454 page_offset += IBLND_MSG_SIZE;
1455 LASSERT(page_offset <= PAGE_SIZE);
1457 if (page_offset == PAGE_SIZE) {
1460 LASSERT(ipage <= txpgs->ibp_npages);
1466 kiblnd_destroy_fmr_pool(struct kib_fmr_pool *fpo)
1468 LASSERT(fpo->fpo_map_count == 0);
1470 if (fpo->fpo_is_fmr && fpo->fmr.fpo_fmr_pool) {
1471 ib_destroy_fmr_pool(fpo->fmr.fpo_fmr_pool);
1473 struct kib_fast_reg_descriptor *frd, *tmp;
1476 list_for_each_entry_safe(frd, tmp, &fpo->fast_reg.fpo_pool_list,
1478 list_del(&frd->frd_list);
1479 #ifndef HAVE_IB_MAP_MR_SG
1480 ib_free_fast_reg_page_list(frd->frd_frpl);
1482 ib_dereg_mr(frd->frd_mr);
1483 LIBCFS_FREE(frd, sizeof(*frd));
1486 if (i < fpo->fast_reg.fpo_pool_size)
1487 CERROR("FastReg pool still has %d regions registered\n",
1488 fpo->fast_reg.fpo_pool_size - i);
1492 kiblnd_hdev_decref(fpo->fpo_hdev);
1494 LIBCFS_FREE(fpo, sizeof(*fpo));
1498 kiblnd_destroy_fmr_pool_list(struct list_head *head)
1500 struct kib_fmr_pool *fpo, *tmp;
1502 list_for_each_entry_safe(fpo, tmp, head, fpo_list) {
1503 list_del(&fpo->fpo_list);
1504 kiblnd_destroy_fmr_pool(fpo);
1509 kiblnd_fmr_pool_size(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
1512 int size = tunables->lnd_fmr_pool_size / ncpts;
1514 return max(IBLND_FMR_POOL, size);
1518 kiblnd_fmr_flush_trigger(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
1521 int size = tunables->lnd_fmr_flush_trigger / ncpts;
1523 return max(IBLND_FMR_POOL_FLUSH, size);
1526 static int kiblnd_alloc_fmr_pool(struct kib_fmr_poolset *fps,
1527 struct kib_fmr_pool *fpo)
1529 struct ib_fmr_pool_param param = {
1530 .max_pages_per_fmr = LNET_MAX_IOV,
1531 .page_shift = PAGE_SHIFT,
1532 .access = (IB_ACCESS_LOCAL_WRITE |
1533 IB_ACCESS_REMOTE_WRITE),
1534 .pool_size = fps->fps_pool_size,
1535 .dirty_watermark = fps->fps_flush_trigger,
1536 .flush_function = NULL,
1538 .cache = !!fps->fps_cache };
1541 fpo->fmr.fpo_fmr_pool = ib_create_fmr_pool(fpo->fpo_hdev->ibh_pd,
1543 if (IS_ERR(fpo->fmr.fpo_fmr_pool)) {
1544 rc = PTR_ERR(fpo->fmr.fpo_fmr_pool);
1546 CERROR("Failed to create FMR pool: %d\n", rc);
1548 CERROR("FMRs are not supported\n");
1550 fpo->fpo_is_fmr = true;
1555 static int kiblnd_alloc_freg_pool(struct kib_fmr_poolset *fps,
1556 struct kib_fmr_pool *fpo,
1557 enum kib_dev_caps dev_caps)
1559 struct kib_fast_reg_descriptor *frd, *tmp;
1562 fpo->fpo_is_fmr = false;
1564 INIT_LIST_HEAD(&fpo->fast_reg.fpo_pool_list);
1565 fpo->fast_reg.fpo_pool_size = 0;
1566 for (i = 0; i < fps->fps_pool_size; i++) {
1567 LIBCFS_CPT_ALLOC(frd, lnet_cpt_table(), fps->fps_cpt,
1570 CERROR("Failed to allocate a new fast_reg descriptor\n");
1576 #ifndef HAVE_IB_MAP_MR_SG
1577 frd->frd_frpl = ib_alloc_fast_reg_page_list(fpo->fpo_hdev->ibh_ibdev,
1579 if (IS_ERR(frd->frd_frpl)) {
1580 rc = PTR_ERR(frd->frd_frpl);
1581 CERROR("Failed to allocate ib_fast_reg_page_list: %d\n",
1583 frd->frd_frpl = NULL;
1588 #ifdef HAVE_IB_ALLOC_FAST_REG_MR
1589 frd->frd_mr = ib_alloc_fast_reg_mr(fpo->fpo_hdev->ibh_pd,
1593 * it is expected to get here if this is an MLX-5 card.
1594 * MLX-4 cards will always use FMR and MLX-5 cards will
1595 * always use fast_reg. It turns out that some MLX-5 cards
1596 * (possibly due to older FW versions) do not natively support
1597 * gaps. So we will need to track them here.
1599 frd->frd_mr = ib_alloc_mr(fpo->fpo_hdev->ibh_pd,
1600 #ifdef IB_MR_TYPE_SG_GAPS
1601 ((*kiblnd_tunables.kib_use_fastreg_gaps == 1) &&
1602 (dev_caps & IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT)) ?
1603 IB_MR_TYPE_SG_GAPS :
1609 if ((*kiblnd_tunables.kib_use_fastreg_gaps == 1) &&
1610 (dev_caps & IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT))
1611 CWARN("using IB_MR_TYPE_SG_GAPS, expect a performance drop\n");
1613 if (IS_ERR(frd->frd_mr)) {
1614 rc = PTR_ERR(frd->frd_mr);
1615 CERROR("Failed to allocate ib_fast_reg_mr: %d\n", rc);
1620 /* There appears to be a bug in MLX5 code where you must
1621 * invalidate the rkey of a new FastReg pool before first
1622 * using it. Thus, I am marking the FRD invalid here. */
1623 frd->frd_valid = false;
1625 list_add_tail(&frd->frd_list, &fpo->fast_reg.fpo_pool_list);
1626 fpo->fast_reg.fpo_pool_size++;
1633 ib_dereg_mr(frd->frd_mr);
1634 #ifndef HAVE_IB_MAP_MR_SG
1636 ib_free_fast_reg_page_list(frd->frd_frpl);
1638 LIBCFS_FREE(frd, sizeof(*frd));
1641 list_for_each_entry_safe(frd, tmp, &fpo->fast_reg.fpo_pool_list,
1643 list_del(&frd->frd_list);
1644 #ifndef HAVE_IB_MAP_MR_SG
1645 ib_free_fast_reg_page_list(frd->frd_frpl);
1647 ib_dereg_mr(frd->frd_mr);
1648 LIBCFS_FREE(frd, sizeof(*frd));
1654 static int kiblnd_create_fmr_pool(struct kib_fmr_poolset *fps,
1655 struct kib_fmr_pool **pp_fpo)
1657 struct kib_dev *dev = fps->fps_net->ibn_dev;
1658 struct kib_fmr_pool *fpo;
1661 LIBCFS_CPT_ALLOC(fpo, lnet_cpt_table(), fps->fps_cpt, sizeof(*fpo));
1665 memset(fpo, 0, sizeof(*fpo));
1667 fpo->fpo_hdev = kiblnd_current_hdev(dev);
1669 if (dev->ibd_dev_caps & IBLND_DEV_CAPS_FMR_ENABLED)
1670 rc = kiblnd_alloc_fmr_pool(fps, fpo);
1672 rc = kiblnd_alloc_freg_pool(fps, fpo, dev->ibd_dev_caps);
1676 fpo->fpo_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
1677 fpo->fpo_owner = fps;
1683 kiblnd_hdev_decref(fpo->fpo_hdev);
1684 LIBCFS_FREE(fpo, sizeof(*fpo));
1689 kiblnd_fail_fmr_poolset(struct kib_fmr_poolset *fps, struct list_head *zombies)
1691 if (fps->fps_net == NULL) /* intialized? */
1694 spin_lock(&fps->fps_lock);
1696 while (!list_empty(&fps->fps_pool_list)) {
1697 struct kib_fmr_pool *fpo = list_entry(fps->fps_pool_list.next,
1698 struct kib_fmr_pool,
1701 fpo->fpo_failed = 1;
1702 list_del(&fpo->fpo_list);
1703 if (fpo->fpo_map_count == 0)
1704 list_add(&fpo->fpo_list, zombies);
1706 list_add(&fpo->fpo_list, &fps->fps_failed_pool_list);
1709 spin_unlock(&fps->fps_lock);
1713 kiblnd_fini_fmr_poolset(struct kib_fmr_poolset *fps)
1715 if (fps->fps_net != NULL) { /* initialized? */
1716 kiblnd_destroy_fmr_pool_list(&fps->fps_failed_pool_list);
1717 kiblnd_destroy_fmr_pool_list(&fps->fps_pool_list);
1722 kiblnd_init_fmr_poolset(struct kib_fmr_poolset *fps, int cpt, int ncpts,
1723 struct kib_net *net,
1724 struct lnet_ioctl_config_o2iblnd_tunables *tunables)
1726 struct kib_fmr_pool *fpo;
1729 memset(fps, 0, sizeof(struct kib_fmr_poolset));
1734 fps->fps_pool_size = kiblnd_fmr_pool_size(tunables, ncpts);
1735 fps->fps_flush_trigger = kiblnd_fmr_flush_trigger(tunables, ncpts);
1736 fps->fps_cache = tunables->lnd_fmr_cache;
1738 spin_lock_init(&fps->fps_lock);
1739 INIT_LIST_HEAD(&fps->fps_pool_list);
1740 INIT_LIST_HEAD(&fps->fps_failed_pool_list);
1742 rc = kiblnd_create_fmr_pool(fps, &fpo);
1744 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1750 kiblnd_fmr_pool_is_idle(struct kib_fmr_pool *fpo, time64_t now)
1752 if (fpo->fpo_map_count != 0) /* still in use */
1754 if (fpo->fpo_failed)
1756 return now >= fpo->fpo_deadline;
1760 kiblnd_map_tx_pages(struct kib_tx *tx, struct kib_rdma_desc *rd)
1762 struct kib_hca_dev *hdev;
1763 __u64 *pages = tx->tx_pages;
1768 hdev = tx->tx_pool->tpo_hdev;
1770 for (i = 0, npages = 0; i < rd->rd_nfrags; i++) {
1771 for (size = 0; size < rd->rd_frags[i].rf_nob;
1772 size += hdev->ibh_page_size) {
1773 pages[npages++] = (rd->rd_frags[i].rf_addr &
1774 hdev->ibh_page_mask) + size;
1782 kiblnd_fmr_pool_unmap(struct kib_fmr *fmr, int status)
1784 struct list_head zombies = LIST_HEAD_INIT(zombies);
1785 struct kib_fmr_pool *fpo = fmr->fmr_pool;
1786 struct kib_fmr_poolset *fps;
1787 time64_t now = ktime_get_seconds();
1788 struct kib_fmr_pool *tmp;
1794 fps = fpo->fpo_owner;
1795 if (fpo->fpo_is_fmr) {
1796 if (fmr->fmr_pfmr) {
1797 ib_fmr_pool_unmap(fmr->fmr_pfmr);
1798 fmr->fmr_pfmr = NULL;
1802 rc = ib_flush_fmr_pool(fpo->fmr.fpo_fmr_pool);
1806 struct kib_fast_reg_descriptor *frd = fmr->fmr_frd;
1809 frd->frd_valid = false;
1810 spin_lock(&fps->fps_lock);
1811 list_add_tail(&frd->frd_list, &fpo->fast_reg.fpo_pool_list);
1812 spin_unlock(&fps->fps_lock);
1813 fmr->fmr_frd = NULL;
1816 fmr->fmr_pool = NULL;
1818 spin_lock(&fps->fps_lock);
1819 fpo->fpo_map_count--; /* decref the pool */
1821 list_for_each_entry_safe(fpo, tmp, &fps->fps_pool_list, fpo_list) {
1822 /* the first pool is persistent */
1823 if (fps->fps_pool_list.next == &fpo->fpo_list)
1826 if (kiblnd_fmr_pool_is_idle(fpo, now)) {
1827 list_move(&fpo->fpo_list, &zombies);
1831 spin_unlock(&fps->fps_lock);
1833 if (!list_empty(&zombies))
1834 kiblnd_destroy_fmr_pool_list(&zombies);
1837 int kiblnd_fmr_pool_map(struct kib_fmr_poolset *fps, struct kib_tx *tx,
1838 struct kib_rdma_desc *rd, u32 nob, u64 iov,
1839 struct kib_fmr *fmr)
1841 struct kib_fmr_pool *fpo;
1842 __u64 *pages = tx->tx_pages;
1844 bool is_rx = (rd != tx->tx_rd);
1845 bool tx_pages_mapped = 0;
1850 spin_lock(&fps->fps_lock);
1851 version = fps->fps_version;
1852 list_for_each_entry(fpo, &fps->fps_pool_list, fpo_list) {
1853 fpo->fpo_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
1854 fpo->fpo_map_count++;
1856 if (fpo->fpo_is_fmr) {
1857 struct ib_pool_fmr *pfmr;
1859 spin_unlock(&fps->fps_lock);
1861 if (!tx_pages_mapped) {
1862 npages = kiblnd_map_tx_pages(tx, rd);
1863 tx_pages_mapped = 1;
1866 pfmr = kib_fmr_pool_map(fpo->fmr.fpo_fmr_pool,
1867 pages, npages, iov);
1868 if (likely(!IS_ERR(pfmr))) {
1869 fmr->fmr_key = is_rx ? pfmr->fmr->rkey
1871 fmr->fmr_frd = NULL;
1872 fmr->fmr_pfmr = pfmr;
1873 fmr->fmr_pool = fpo;
1878 if (!list_empty(&fpo->fast_reg.fpo_pool_list)) {
1879 struct kib_fast_reg_descriptor *frd;
1880 #ifdef HAVE_IB_MAP_MR_SG
1881 struct ib_reg_wr *wr;
1884 struct ib_rdma_wr *wr;
1885 struct ib_fast_reg_page_list *frpl;
1889 frd = list_first_entry(&fpo->fast_reg.fpo_pool_list,
1890 struct kib_fast_reg_descriptor,
1892 list_del(&frd->frd_list);
1893 spin_unlock(&fps->fps_lock);
1895 #ifndef HAVE_IB_MAP_MR_SG
1896 frpl = frd->frd_frpl;
1900 if (!frd->frd_valid) {
1901 struct ib_rdma_wr *inv_wr;
1902 __u32 key = is_rx ? mr->rkey : mr->lkey;
1904 inv_wr = &frd->frd_inv_wr;
1905 memset(inv_wr, 0, sizeof(*inv_wr));
1907 inv_wr->wr.opcode = IB_WR_LOCAL_INV;
1908 inv_wr->wr.wr_id = IBLND_WID_MR;
1909 inv_wr->wr.ex.invalidate_rkey = key;
1912 key = ib_inc_rkey(key);
1913 ib_update_fast_reg_key(mr, key);
1916 #ifdef HAVE_IB_MAP_MR_SG
1917 #ifdef HAVE_IB_MAP_MR_SG_5ARGS
1918 n = ib_map_mr_sg(mr, tx->tx_frags,
1919 tx->tx_nfrags, NULL, PAGE_SIZE);
1921 n = ib_map_mr_sg(mr, tx->tx_frags,
1922 tx->tx_nfrags, PAGE_SIZE);
1924 if (unlikely(n != tx->tx_nfrags)) {
1925 CERROR("Failed to map mr %d/%d "
1926 "elements\n", n, tx->tx_nfrags);
1927 return n < 0 ? n : -EINVAL;
1930 wr = &frd->frd_fastreg_wr;
1931 memset(wr, 0, sizeof(*wr));
1933 wr->wr.opcode = IB_WR_REG_MR;
1934 wr->wr.wr_id = IBLND_WID_MR;
1936 wr->wr.send_flags = 0;
1938 wr->key = is_rx ? mr->rkey : mr->lkey;
1939 wr->access = (IB_ACCESS_LOCAL_WRITE |
1940 IB_ACCESS_REMOTE_WRITE);
1942 if (!tx_pages_mapped) {
1943 npages = kiblnd_map_tx_pages(tx, rd);
1944 tx_pages_mapped = 1;
1947 LASSERT(npages <= frpl->max_page_list_len);
1948 memcpy(frpl->page_list, pages,
1949 sizeof(*pages) * npages);
1951 /* Prepare FastReg WR */
1952 wr = &frd->frd_fastreg_wr;
1953 memset(wr, 0, sizeof(*wr));
1955 wr->wr.opcode = IB_WR_FAST_REG_MR;
1956 wr->wr.wr_id = IBLND_WID_MR;
1958 wr->wr.wr.fast_reg.iova_start = iov;
1959 wr->wr.wr.fast_reg.page_list = frpl;
1960 wr->wr.wr.fast_reg.page_list_len = npages;
1961 wr->wr.wr.fast_reg.page_shift = PAGE_SHIFT;
1962 wr->wr.wr.fast_reg.length = nob;
1963 wr->wr.wr.fast_reg.rkey =
1964 is_rx ? mr->rkey : mr->lkey;
1965 wr->wr.wr.fast_reg.access_flags =
1966 (IB_ACCESS_LOCAL_WRITE |
1967 IB_ACCESS_REMOTE_WRITE);
1970 fmr->fmr_key = is_rx ? mr->rkey : mr->lkey;
1972 fmr->fmr_pfmr = NULL;
1973 fmr->fmr_pool = fpo;
1976 spin_unlock(&fps->fps_lock);
1980 spin_lock(&fps->fps_lock);
1981 fpo->fpo_map_count--;
1982 if (rc != -EAGAIN) {
1983 spin_unlock(&fps->fps_lock);
1987 /* EAGAIN and ... */
1988 if (version != fps->fps_version) {
1989 spin_unlock(&fps->fps_lock);
1994 if (fps->fps_increasing) {
1995 spin_unlock(&fps->fps_lock);
1996 CDEBUG(D_NET, "Another thread is allocating new "
1997 "FMR pool, waiting for her to complete\n");
2003 if (ktime_get_seconds() < fps->fps_next_retry) {
2004 /* someone failed recently */
2005 spin_unlock(&fps->fps_lock);
2009 fps->fps_increasing = 1;
2010 spin_unlock(&fps->fps_lock);
2012 CDEBUG(D_NET, "Allocate new FMR pool\n");
2013 rc = kiblnd_create_fmr_pool(fps, &fpo);
2014 spin_lock(&fps->fps_lock);
2015 fps->fps_increasing = 0;
2018 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
2020 fps->fps_next_retry = ktime_get_seconds() + IBLND_POOL_RETRY;
2022 spin_unlock(&fps->fps_lock);
2028 kiblnd_fini_pool(struct kib_pool *pool)
2030 LASSERT(list_empty(&pool->po_free_list));
2031 LASSERT(pool->po_allocated == 0);
2033 CDEBUG(D_NET, "Finalize %s pool\n", pool->po_owner->ps_name);
2037 kiblnd_init_pool(struct kib_poolset *ps, struct kib_pool *pool, int size)
2039 CDEBUG(D_NET, "Initialize %s pool\n", ps->ps_name);
2041 memset(pool, 0, sizeof(struct kib_pool));
2042 INIT_LIST_HEAD(&pool->po_free_list);
2043 pool->po_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
2044 pool->po_owner = ps;
2045 pool->po_size = size;
2049 kiblnd_destroy_pool_list(struct list_head *head)
2051 struct kib_pool *pool;
2053 while (!list_empty(head)) {
2054 pool = list_entry(head->next, struct kib_pool, po_list);
2055 list_del(&pool->po_list);
2057 LASSERT(pool->po_owner != NULL);
2058 pool->po_owner->ps_pool_destroy(pool);
2063 kiblnd_fail_poolset(struct kib_poolset *ps, struct list_head *zombies)
2065 if (ps->ps_net == NULL) /* intialized? */
2068 spin_lock(&ps->ps_lock);
2069 while (!list_empty(&ps->ps_pool_list)) {
2070 struct kib_pool *po = list_entry(ps->ps_pool_list.next,
2071 struct kib_pool, po_list);
2074 list_del(&po->po_list);
2075 if (po->po_allocated == 0)
2076 list_add(&po->po_list, zombies);
2078 list_add(&po->po_list, &ps->ps_failed_pool_list);
2080 spin_unlock(&ps->ps_lock);
2084 kiblnd_fini_poolset(struct kib_poolset *ps)
2086 if (ps->ps_net != NULL) { /* initialized? */
2087 kiblnd_destroy_pool_list(&ps->ps_failed_pool_list);
2088 kiblnd_destroy_pool_list(&ps->ps_pool_list);
2093 kiblnd_init_poolset(struct kib_poolset *ps, int cpt,
2094 struct kib_net *net, char *name, int size,
2095 kib_ps_pool_create_t po_create,
2096 kib_ps_pool_destroy_t po_destroy,
2097 kib_ps_node_init_t nd_init,
2098 kib_ps_node_fini_t nd_fini)
2100 struct kib_pool *pool;
2103 memset(ps, 0, sizeof(struct kib_poolset));
2107 ps->ps_pool_create = po_create;
2108 ps->ps_pool_destroy = po_destroy;
2109 ps->ps_node_init = nd_init;
2110 ps->ps_node_fini = nd_fini;
2111 ps->ps_pool_size = size;
2112 if (strlcpy(ps->ps_name, name, sizeof(ps->ps_name))
2113 >= sizeof(ps->ps_name))
2115 spin_lock_init(&ps->ps_lock);
2116 INIT_LIST_HEAD(&ps->ps_pool_list);
2117 INIT_LIST_HEAD(&ps->ps_failed_pool_list);
2119 rc = ps->ps_pool_create(ps, size, &pool);
2121 list_add(&pool->po_list, &ps->ps_pool_list);
2123 CERROR("Failed to create the first pool for %s\n", ps->ps_name);
2129 kiblnd_pool_is_idle(struct kib_pool *pool, time64_t now)
2131 if (pool->po_allocated != 0) /* still in use */
2133 if (pool->po_failed)
2135 return now >= pool->po_deadline;
2139 kiblnd_pool_free_node(struct kib_pool *pool, struct list_head *node)
2141 struct list_head zombies = LIST_HEAD_INIT(zombies);
2142 struct kib_poolset *ps = pool->po_owner;
2143 struct kib_pool *tmp;
2144 time64_t now = ktime_get_seconds();
2146 spin_lock(&ps->ps_lock);
2148 if (ps->ps_node_fini != NULL)
2149 ps->ps_node_fini(pool, node);
2151 LASSERT(pool->po_allocated > 0);
2152 list_add(node, &pool->po_free_list);
2153 pool->po_allocated--;
2155 list_for_each_entry_safe(pool, tmp, &ps->ps_pool_list, po_list) {
2156 /* the first pool is persistent */
2157 if (ps->ps_pool_list.next == &pool->po_list)
2160 if (kiblnd_pool_is_idle(pool, now))
2161 list_move(&pool->po_list, &zombies);
2163 spin_unlock(&ps->ps_lock);
2165 if (!list_empty(&zombies))
2166 kiblnd_destroy_pool_list(&zombies);
2170 kiblnd_pool_alloc_node(struct kib_poolset *ps)
2172 struct list_head *node;
2173 struct kib_pool *pool;
2175 unsigned int interval = 1;
2176 ktime_t time_before;
2177 unsigned int trips = 0;
2180 spin_lock(&ps->ps_lock);
2181 list_for_each_entry(pool, &ps->ps_pool_list, po_list) {
2182 if (list_empty(&pool->po_free_list))
2185 pool->po_allocated++;
2186 pool->po_deadline = ktime_get_seconds() +
2187 IBLND_POOL_DEADLINE;
2188 node = pool->po_free_list.next;
2191 if (ps->ps_node_init != NULL) {
2192 /* still hold the lock */
2193 ps->ps_node_init(pool, node);
2195 spin_unlock(&ps->ps_lock);
2199 /* no available tx pool and ... */
2200 if (ps->ps_increasing) {
2201 /* another thread is allocating a new pool */
2202 spin_unlock(&ps->ps_lock);
2204 CDEBUG(D_NET, "Another thread is allocating new "
2205 "%s pool, waiting %d HZs for her to complete."
2207 ps->ps_name, interval, trips);
2209 set_current_state(TASK_INTERRUPTIBLE);
2210 schedule_timeout(interval);
2211 if (interval < cfs_time_seconds(1))
2217 if (ktime_get_seconds() < ps->ps_next_retry) {
2218 /* someone failed recently */
2219 spin_unlock(&ps->ps_lock);
2223 ps->ps_increasing = 1;
2224 spin_unlock(&ps->ps_lock);
2226 CDEBUG(D_NET, "%s pool exhausted, allocate new pool\n", ps->ps_name);
2227 time_before = ktime_get();
2228 rc = ps->ps_pool_create(ps, ps->ps_pool_size, &pool);
2229 CDEBUG(D_NET, "ps_pool_create took %lld ms to complete",
2230 ktime_ms_delta(ktime_get(), time_before));
2232 spin_lock(&ps->ps_lock);
2233 ps->ps_increasing = 0;
2235 list_add_tail(&pool->po_list, &ps->ps_pool_list);
2237 ps->ps_next_retry = ktime_get_seconds() + IBLND_POOL_RETRY;
2238 CERROR("Can't allocate new %s pool because out of memory\n",
2241 spin_unlock(&ps->ps_lock);
2247 kiblnd_destroy_tx_pool(struct kib_pool *pool)
2249 struct kib_tx_pool *tpo = container_of(pool, struct kib_tx_pool,
2253 LASSERT (pool->po_allocated == 0);
2255 if (tpo->tpo_tx_pages != NULL) {
2256 kiblnd_unmap_tx_pool(tpo);
2257 kiblnd_free_pages(tpo->tpo_tx_pages);
2260 if (tpo->tpo_tx_descs == NULL)
2263 for (i = 0; i < pool->po_size; i++) {
2264 struct kib_tx *tx = &tpo->tpo_tx_descs[i];
2265 int wrq_sge = *kiblnd_tunables.kib_wrq_sge;
2267 list_del(&tx->tx_list);
2268 if (tx->tx_pages != NULL)
2269 LIBCFS_FREE(tx->tx_pages,
2271 sizeof(*tx->tx_pages));
2272 if (tx->tx_frags != NULL)
2273 LIBCFS_FREE(tx->tx_frags,
2274 (1 + IBLND_MAX_RDMA_FRAGS) *
2275 sizeof(*tx->tx_frags));
2276 if (tx->tx_wrq != NULL)
2277 LIBCFS_FREE(tx->tx_wrq,
2278 (1 + IBLND_MAX_RDMA_FRAGS) *
2279 sizeof(*tx->tx_wrq));
2280 if (tx->tx_sge != NULL)
2281 LIBCFS_FREE(tx->tx_sge,
2282 (1 + IBLND_MAX_RDMA_FRAGS) * wrq_sge *
2283 sizeof(*tx->tx_sge));
2284 if (tx->tx_rd != NULL)
2285 LIBCFS_FREE(tx->tx_rd,
2286 offsetof(struct kib_rdma_desc,
2287 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2290 LIBCFS_FREE(tpo->tpo_tx_descs,
2291 pool->po_size * sizeof(struct kib_tx));
2293 kiblnd_fini_pool(pool);
2294 LIBCFS_FREE(tpo, sizeof(struct kib_tx_pool));
2297 static int kiblnd_tx_pool_size(struct lnet_ni *ni, int ncpts)
2299 struct lnet_ioctl_config_o2iblnd_tunables *tunables;
2302 tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib;
2303 ntx = tunables->lnd_ntx / ncpts;
2305 return max(IBLND_TX_POOL, ntx);
2309 kiblnd_create_tx_pool(struct kib_poolset *ps, int size, struct kib_pool **pp_po)
2313 struct kib_pool *pool;
2314 struct kib_tx_pool *tpo;
2316 LIBCFS_CPT_ALLOC(tpo, lnet_cpt_table(), ps->ps_cpt, sizeof(*tpo));
2318 CERROR("Failed to allocate TX pool\n");
2322 pool = &tpo->tpo_pool;
2323 kiblnd_init_pool(ps, pool, size);
2324 tpo->tpo_tx_descs = NULL;
2325 tpo->tpo_tx_pages = NULL;
2327 npg = (size * IBLND_MSG_SIZE + PAGE_SIZE - 1) / PAGE_SIZE;
2328 if (kiblnd_alloc_pages(&tpo->tpo_tx_pages, ps->ps_cpt, npg) != 0) {
2329 CERROR("Can't allocate tx pages: %d\n", npg);
2330 LIBCFS_FREE(tpo, sizeof(struct kib_tx_pool));
2334 LIBCFS_CPT_ALLOC(tpo->tpo_tx_descs, lnet_cpt_table(), ps->ps_cpt,
2335 size * sizeof(struct kib_tx));
2336 if (tpo->tpo_tx_descs == NULL) {
2337 CERROR("Can't allocate %d tx descriptors\n", size);
2338 ps->ps_pool_destroy(pool);
2342 memset(tpo->tpo_tx_descs, 0, size * sizeof(struct kib_tx));
2344 for (i = 0; i < size; i++) {
2345 struct kib_tx *tx = &tpo->tpo_tx_descs[i];
2346 int wrq_sge = *kiblnd_tunables.kib_wrq_sge;
2349 if (ps->ps_net->ibn_fmr_ps != NULL) {
2350 LIBCFS_CPT_ALLOC(tx->tx_pages,
2351 lnet_cpt_table(), ps->ps_cpt,
2352 LNET_MAX_IOV * sizeof(*tx->tx_pages));
2353 if (tx->tx_pages == NULL)
2357 LIBCFS_CPT_ALLOC(tx->tx_frags, lnet_cpt_table(), ps->ps_cpt,
2358 (1 + IBLND_MAX_RDMA_FRAGS) *
2359 sizeof(*tx->tx_frags));
2360 if (tx->tx_frags == NULL)
2363 sg_init_table(tx->tx_frags, IBLND_MAX_RDMA_FRAGS + 1);
2365 LIBCFS_CPT_ALLOC(tx->tx_wrq, lnet_cpt_table(), ps->ps_cpt,
2366 (1 + IBLND_MAX_RDMA_FRAGS) *
2367 sizeof(*tx->tx_wrq));
2368 if (tx->tx_wrq == NULL)
2371 LIBCFS_CPT_ALLOC(tx->tx_sge, lnet_cpt_table(), ps->ps_cpt,
2372 (1 + IBLND_MAX_RDMA_FRAGS) * wrq_sge *
2373 sizeof(*tx->tx_sge));
2374 if (tx->tx_sge == NULL)
2377 LIBCFS_CPT_ALLOC(tx->tx_rd, lnet_cpt_table(), ps->ps_cpt,
2378 offsetof(struct kib_rdma_desc,
2379 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2380 if (tx->tx_rd == NULL)
2385 kiblnd_map_tx_pool(tpo);
2390 ps->ps_pool_destroy(pool);
2395 kiblnd_tx_init(struct kib_pool *pool, struct list_head *node)
2397 struct kib_tx_poolset *tps = container_of(pool->po_owner,
2398 struct kib_tx_poolset,
2400 struct kib_tx *tx = list_entry(node, struct kib_tx, tx_list);
2402 tx->tx_cookie = tps->tps_next_tx_cookie++;
2406 kiblnd_net_fini_pools(struct kib_net *net)
2410 cfs_cpt_for_each(i, lnet_cpt_table()) {
2411 struct kib_tx_poolset *tps;
2412 struct kib_fmr_poolset *fps;
2414 if (net->ibn_tx_ps != NULL) {
2415 tps = net->ibn_tx_ps[i];
2416 kiblnd_fini_poolset(&tps->tps_poolset);
2419 if (net->ibn_fmr_ps != NULL) {
2420 fps = net->ibn_fmr_ps[i];
2421 kiblnd_fini_fmr_poolset(fps);
2425 if (net->ibn_tx_ps != NULL) {
2426 cfs_percpt_free(net->ibn_tx_ps);
2427 net->ibn_tx_ps = NULL;
2430 if (net->ibn_fmr_ps != NULL) {
2431 cfs_percpt_free(net->ibn_fmr_ps);
2432 net->ibn_fmr_ps = NULL;
2437 kiblnd_net_init_pools(struct kib_net *net, struct lnet_ni *ni, __u32 *cpts,
2440 struct lnet_ioctl_config_o2iblnd_tunables *tunables;
2441 #ifdef HAVE_IB_GET_DMA_MR
2442 unsigned long flags;
2448 tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib;
2450 #ifdef HAVE_IB_GET_DMA_MR
2451 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2453 * if lnd_map_on_demand is zero then we have effectively disabled
2454 * FMR or FastReg and we're using global memory regions
2457 if (!tunables->lnd_map_on_demand) {
2458 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
2460 goto create_tx_pool;
2463 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2466 if (tunables->lnd_fmr_pool_size < tunables->lnd_ntx / 4) {
2467 CERROR("Can't set fmr pool size (%d) < ntx / 4(%d)\n",
2468 tunables->lnd_fmr_pool_size,
2469 tunables->lnd_ntx / 4);
2474 /* TX pool must be created later than FMR, see LU-2268
2476 LASSERT(net->ibn_tx_ps == NULL);
2478 /* premapping can fail if ibd_nmr > 1, so we always create
2479 * FMR pool and map-on-demand if premapping failed */
2481 net->ibn_fmr_ps = cfs_percpt_alloc(lnet_cpt_table(),
2482 sizeof(struct kib_fmr_poolset));
2483 if (net->ibn_fmr_ps == NULL) {
2484 CERROR("Failed to allocate FMR pool array\n");
2489 for (i = 0; i < ncpts; i++) {
2490 cpt = (cpts == NULL) ? i : cpts[i];
2491 rc = kiblnd_init_fmr_poolset(net->ibn_fmr_ps[cpt], cpt, ncpts,
2494 CERROR("Can't initialize FMR pool for CPT %d: %d\n",
2501 LASSERT(i == ncpts);
2503 #ifdef HAVE_IB_GET_DMA_MR
2506 net->ibn_tx_ps = cfs_percpt_alloc(lnet_cpt_table(),
2507 sizeof(struct kib_tx_poolset));
2508 if (net->ibn_tx_ps == NULL) {
2509 CERROR("Failed to allocate tx pool array\n");
2514 for (i = 0; i < ncpts; i++) {
2515 cpt = (cpts == NULL) ? i : cpts[i];
2516 rc = kiblnd_init_poolset(&net->ibn_tx_ps[cpt]->tps_poolset,
2518 kiblnd_tx_pool_size(ni, ncpts),
2519 kiblnd_create_tx_pool,
2520 kiblnd_destroy_tx_pool,
2521 kiblnd_tx_init, NULL);
2523 CERROR("Can't initialize TX pool for CPT %d: %d\n",
2531 kiblnd_net_fini_pools(net);
2537 kiblnd_hdev_get_attr(struct kib_hca_dev *hdev)
2539 struct ib_device_attr *dev_attr;
2542 /* It's safe to assume a HCA can handle a page size
2543 * matching that of the native system */
2544 hdev->ibh_page_shift = PAGE_SHIFT;
2545 hdev->ibh_page_size = 1 << PAGE_SHIFT;
2546 hdev->ibh_page_mask = ~((__u64)hdev->ibh_page_size - 1);
2548 #ifndef HAVE_IB_DEVICE_ATTRS
2549 LIBCFS_ALLOC(dev_attr, sizeof(*dev_attr));
2550 if (dev_attr == NULL) {
2551 CERROR("Out of memory\n");
2555 rc = ib_query_device(hdev->ibh_ibdev, dev_attr);
2557 CERROR("Failed to query IB device: %d\n", rc);
2558 goto out_clean_attr;
2561 dev_attr = &hdev->ibh_ibdev->attrs;
2564 hdev->ibh_mr_size = dev_attr->max_mr_size;
2566 /* Setup device Memory Registration capabilities */
2567 #ifdef HAVE_IB_DEVICE_OPS
2568 if (hdev->ibh_ibdev->ops.alloc_fmr &&
2569 hdev->ibh_ibdev->ops.dealloc_fmr &&
2570 hdev->ibh_ibdev->ops.map_phys_fmr &&
2571 hdev->ibh_ibdev->ops.unmap_fmr) {
2573 if (hdev->ibh_ibdev->alloc_fmr &&
2574 hdev->ibh_ibdev->dealloc_fmr &&
2575 hdev->ibh_ibdev->map_phys_fmr &&
2576 hdev->ibh_ibdev->unmap_fmr) {
2578 LCONSOLE_INFO("Using FMR for registration\n");
2579 hdev->ibh_dev->ibd_dev_caps |= IBLND_DEV_CAPS_FMR_ENABLED;
2580 } else if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) {
2581 LCONSOLE_INFO("Using FastReg for registration\n");
2582 hdev->ibh_dev->ibd_dev_caps |= IBLND_DEV_CAPS_FASTREG_ENABLED;
2583 #ifndef HAVE_IB_ALLOC_FAST_REG_MR
2584 #ifdef IB_DEVICE_SG_GAPS_REG
2585 if (dev_attr->device_cap_flags & IB_DEVICE_SG_GAPS_REG)
2586 hdev->ibh_dev->ibd_dev_caps |= IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT;
2593 if (rc == 0 && hdev->ibh_mr_size == ~0ULL)
2594 hdev->ibh_mr_shift = 64;
2598 #ifndef HAVE_IB_DEVICE_ATTRS
2600 LIBCFS_FREE(dev_attr, sizeof(*dev_attr));
2604 CERROR("IB device does not support FMRs nor FastRegs, can't "
2605 "register memory: %d\n", rc);
2606 else if (rc == -EINVAL)
2607 CERROR("Invalid mr size: %#llx\n", hdev->ibh_mr_size);
2611 #ifdef HAVE_IB_GET_DMA_MR
2613 kiblnd_hdev_cleanup_mrs(struct kib_hca_dev *hdev)
2615 if (hdev->ibh_mrs == NULL)
2618 ib_dereg_mr(hdev->ibh_mrs);
2620 hdev->ibh_mrs = NULL;
2625 kiblnd_hdev_destroy(struct kib_hca_dev *hdev)
2627 #ifdef HAVE_IB_GET_DMA_MR
2628 kiblnd_hdev_cleanup_mrs(hdev);
2631 if (hdev->ibh_pd != NULL)
2632 ib_dealloc_pd(hdev->ibh_pd);
2634 if (hdev->ibh_cmid != NULL)
2635 rdma_destroy_id(hdev->ibh_cmid);
2637 LIBCFS_FREE(hdev, sizeof(*hdev));
2640 #ifdef HAVE_IB_GET_DMA_MR
2642 kiblnd_hdev_setup_mrs(struct kib_hca_dev *hdev)
2645 int acflags = IB_ACCESS_LOCAL_WRITE |
2646 IB_ACCESS_REMOTE_WRITE;
2648 mr = ib_get_dma_mr(hdev->ibh_pd, acflags);
2650 CERROR("Failed ib_get_dma_mr: %ld\n", PTR_ERR(mr));
2651 kiblnd_hdev_cleanup_mrs(hdev);
2662 kiblnd_dummy_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event)
2668 kiblnd_dev_need_failover(struct kib_dev *dev, struct net *ns)
2670 struct rdma_cm_id *cmid;
2671 struct sockaddr_in srcaddr;
2672 struct sockaddr_in dstaddr;
2675 if (dev->ibd_hdev == NULL || /* initializing */
2676 dev->ibd_hdev->ibh_cmid == NULL || /* listener is dead */
2677 *kiblnd_tunables.kib_dev_failover > 1) /* debugging */
2680 /* XXX: it's UGLY, but I don't have better way to find
2681 * ib-bonding HCA failover because:
2683 * a. no reliable CM event for HCA failover...
2684 * b. no OFED API to get ib_device for current net_device...
2686 * We have only two choices at this point:
2688 * a. rdma_bind_addr(), it will conflict with listener cmid
2689 * b. rdma_resolve_addr() to zero addr */
2690 cmid = kiblnd_rdma_create_id(ns, kiblnd_dummy_callback, dev,
2691 RDMA_PS_TCP, IB_QPT_RC);
2694 CERROR("Failed to create cmid for failover: %d\n", rc);
2698 memset(&srcaddr, 0, sizeof(srcaddr));
2699 srcaddr.sin_family = AF_INET;
2700 srcaddr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2702 memset(&dstaddr, 0, sizeof(dstaddr));
2703 dstaddr.sin_family = AF_INET;
2704 rc = rdma_resolve_addr(cmid, (struct sockaddr *)&srcaddr,
2705 (struct sockaddr *)&dstaddr, 1);
2706 if (rc != 0 || cmid->device == NULL) {
2707 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2708 dev->ibd_ifname, &dev->ibd_ifip,
2710 rdma_destroy_id(cmid);
2714 rc = dev->ibd_hdev->ibh_ibdev != cmid->device; /* true for failover */
2715 rdma_destroy_id(cmid);
2720 kiblnd_dev_failover(struct kib_dev *dev, struct net *ns)
2722 struct list_head zombie_tpo = LIST_HEAD_INIT(zombie_tpo);
2723 struct list_head zombie_ppo = LIST_HEAD_INIT(zombie_ppo);
2724 struct list_head zombie_fpo = LIST_HEAD_INIT(zombie_fpo);
2725 struct rdma_cm_id *cmid = NULL;
2726 struct kib_hca_dev *hdev = NULL;
2727 struct kib_hca_dev *old;
2729 struct kib_net *net;
2730 struct sockaddr_in addr;
2731 unsigned long flags;
2735 LASSERT (*kiblnd_tunables.kib_dev_failover > 1 ||
2736 dev->ibd_can_failover ||
2737 dev->ibd_hdev == NULL);
2739 rc = kiblnd_dev_need_failover(dev, ns);
2743 if (dev->ibd_hdev != NULL &&
2744 dev->ibd_hdev->ibh_cmid != NULL) {
2745 /* XXX it's not good to close old listener at here,
2746 * because we can fail to create new listener.
2747 * But we have to close it now, otherwise rdma_bind_addr
2748 * will return EADDRINUSE... How crap! */
2749 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2751 cmid = dev->ibd_hdev->ibh_cmid;
2752 /* make next schedule of kiblnd_dev_need_failover()
2753 * return 1 for me */
2754 dev->ibd_hdev->ibh_cmid = NULL;
2755 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2757 rdma_destroy_id(cmid);
2760 cmid = kiblnd_rdma_create_id(ns, kiblnd_cm_callback, dev, RDMA_PS_TCP,
2764 CERROR("Failed to create cmid for failover: %d\n", rc);
2768 memset(&addr, 0, sizeof(addr));
2769 addr.sin_family = AF_INET;
2770 addr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2771 addr.sin_port = htons(*kiblnd_tunables.kib_service);
2773 /* Bind to failover device or port */
2774 rc = rdma_bind_addr(cmid, (struct sockaddr *)&addr);
2775 if (rc != 0 || cmid->device == NULL) {
2776 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2777 dev->ibd_ifname, &dev->ibd_ifip,
2779 rdma_destroy_id(cmid);
2783 LIBCFS_ALLOC(hdev, sizeof(*hdev));
2785 CERROR("Failed to allocate kib_hca_dev\n");
2786 rdma_destroy_id(cmid);
2791 atomic_set(&hdev->ibh_ref, 1);
2792 hdev->ibh_dev = dev;
2793 hdev->ibh_cmid = cmid;
2794 hdev->ibh_ibdev = cmid->device;
2796 #ifdef HAVE_IB_ALLOC_PD_2ARGS
2797 pd = ib_alloc_pd(cmid->device, 0);
2799 pd = ib_alloc_pd(cmid->device);
2803 CERROR("Can't allocate PD: %d\n", rc);
2809 rc = rdma_listen(cmid, 0);
2811 CERROR("Can't start new listener: %d\n", rc);
2815 rc = kiblnd_hdev_get_attr(hdev);
2817 CERROR("Can't get device attributes: %d\n", rc);
2821 #ifdef HAVE_IB_GET_DMA_MR
2822 rc = kiblnd_hdev_setup_mrs(hdev);
2824 CERROR("Can't setup device: %d\n", rc);
2829 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2831 old = dev->ibd_hdev;
2832 dev->ibd_hdev = hdev; /* take over the refcount */
2835 list_for_each_entry(net, &dev->ibd_nets, ibn_list) {
2836 cfs_cpt_for_each(i, lnet_cpt_table()) {
2837 kiblnd_fail_poolset(&net->ibn_tx_ps[i]->tps_poolset,
2840 if (net->ibn_fmr_ps != NULL)
2841 kiblnd_fail_fmr_poolset(net->ibn_fmr_ps[i],
2846 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2848 if (!list_empty(&zombie_tpo))
2849 kiblnd_destroy_pool_list(&zombie_tpo);
2850 if (!list_empty(&zombie_ppo))
2851 kiblnd_destroy_pool_list(&zombie_ppo);
2852 if (!list_empty(&zombie_fpo))
2853 kiblnd_destroy_fmr_pool_list(&zombie_fpo);
2855 kiblnd_hdev_decref(hdev);
2858 dev->ibd_failed_failover++;
2860 dev->ibd_failed_failover = 0;
2866 kiblnd_destroy_dev(struct kib_dev *dev)
2868 LASSERT(dev->ibd_nnets == 0);
2869 LASSERT(list_empty(&dev->ibd_nets));
2871 list_del(&dev->ibd_fail_list);
2872 list_del(&dev->ibd_list);
2874 if (dev->ibd_hdev != NULL)
2875 kiblnd_hdev_decref(dev->ibd_hdev);
2877 LIBCFS_FREE(dev, sizeof(*dev));
2881 kiblnd_base_shutdown(void)
2883 struct kib_sched_info *sched;
2886 LASSERT(list_empty(&kiblnd_data.kib_devs));
2888 CDEBUG(D_MALLOC, "before LND base cleanup: kmem %d\n",
2889 atomic_read(&libcfs_kmemory));
2891 switch (kiblnd_data.kib_init) {
2895 case IBLND_INIT_ALL:
2896 case IBLND_INIT_DATA:
2897 LASSERT (kiblnd_data.kib_peers != NULL);
2898 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
2899 LASSERT(list_empty(&kiblnd_data.kib_peers[i]));
2901 LASSERT(list_empty(&kiblnd_data.kib_connd_zombies));
2902 LASSERT(list_empty(&kiblnd_data.kib_connd_conns));
2903 LASSERT(list_empty(&kiblnd_data.kib_reconn_list));
2904 LASSERT(list_empty(&kiblnd_data.kib_reconn_wait));
2906 /* flag threads to terminate; wake and wait for them to die */
2907 kiblnd_data.kib_shutdown = 1;
2909 /* NB: we really want to stop scheduler threads net by net
2910 * instead of the whole module, this should be improved
2911 * with dynamic configuration LNet */
2912 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds)
2913 wake_up_all(&sched->ibs_waitq);
2915 wake_up_all(&kiblnd_data.kib_connd_waitq);
2916 wake_up_all(&kiblnd_data.kib_failover_waitq);
2919 while (atomic_read(&kiblnd_data.kib_nthreads) != 0) {
2922 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET,
2923 "Waiting for %d threads to terminate\n",
2924 atomic_read(&kiblnd_data.kib_nthreads));
2925 set_current_state(TASK_UNINTERRUPTIBLE);
2926 schedule_timeout(cfs_time_seconds(1));
2931 case IBLND_INIT_NOTHING:
2935 if (kiblnd_data.kib_peers != NULL) {
2936 LIBCFS_FREE(kiblnd_data.kib_peers,
2937 sizeof(struct list_head) *
2938 kiblnd_data.kib_peer_hash_size);
2941 if (kiblnd_data.kib_scheds != NULL)
2942 cfs_percpt_free(kiblnd_data.kib_scheds);
2944 CDEBUG(D_MALLOC, "after LND base cleanup: kmem %d\n",
2945 atomic_read(&libcfs_kmemory));
2947 kiblnd_data.kib_init = IBLND_INIT_NOTHING;
2948 module_put(THIS_MODULE);
2952 kiblnd_shutdown(struct lnet_ni *ni)
2954 struct kib_net *net = ni->ni_data;
2955 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2957 unsigned long flags;
2959 LASSERT(kiblnd_data.kib_init == IBLND_INIT_ALL);
2964 CDEBUG(D_MALLOC, "before LND net cleanup: kmem %d\n",
2965 atomic_read(&libcfs_kmemory));
2967 write_lock_irqsave(g_lock, flags);
2968 net->ibn_shutdown = 1;
2969 write_unlock_irqrestore(g_lock, flags);
2971 switch (net->ibn_init) {
2975 case IBLND_INIT_ALL:
2976 /* nuke all existing peers within this net */
2977 kiblnd_del_peer(ni, LNET_NID_ANY);
2979 /* Wait for all peer_ni state to clean up */
2981 while (atomic_read(&net->ibn_npeers) != 0) {
2984 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET,
2985 "%s: waiting for %d peers to disconnect\n",
2986 libcfs_nid2str(ni->ni_nid),
2987 atomic_read(&net->ibn_npeers));
2988 set_current_state(TASK_UNINTERRUPTIBLE);
2989 schedule_timeout(cfs_time_seconds(1));
2992 kiblnd_net_fini_pools(net);
2994 write_lock_irqsave(g_lock, flags);
2995 LASSERT(net->ibn_dev->ibd_nnets > 0);
2996 net->ibn_dev->ibd_nnets--;
2997 list_del(&net->ibn_list);
2998 write_unlock_irqrestore(g_lock, flags);
3002 case IBLND_INIT_NOTHING:
3003 LASSERT (atomic_read(&net->ibn_nconns) == 0);
3005 if (net->ibn_dev != NULL &&
3006 net->ibn_dev->ibd_nnets == 0)
3007 kiblnd_destroy_dev(net->ibn_dev);
3012 CDEBUG(D_MALLOC, "after LND net cleanup: kmem %d\n",
3013 atomic_read(&libcfs_kmemory));
3015 net->ibn_init = IBLND_INIT_NOTHING;
3018 LIBCFS_FREE(net, sizeof(*net));
3021 if (list_empty(&kiblnd_data.kib_devs))
3022 kiblnd_base_shutdown();
3027 kiblnd_base_startup(struct net *ns)
3029 struct kib_sched_info *sched;
3033 LASSERT(kiblnd_data.kib_init == IBLND_INIT_NOTHING);
3035 try_module_get(THIS_MODULE);
3036 memset(&kiblnd_data, 0, sizeof(kiblnd_data)); /* zero pointers, flags etc */
3038 rwlock_init(&kiblnd_data.kib_global_lock);
3040 INIT_LIST_HEAD(&kiblnd_data.kib_devs);
3041 INIT_LIST_HEAD(&kiblnd_data.kib_failed_devs);
3043 kiblnd_data.kib_peer_hash_size = IBLND_PEER_HASH_SIZE;
3044 LIBCFS_ALLOC(kiblnd_data.kib_peers,
3045 sizeof(struct list_head) *
3046 kiblnd_data.kib_peer_hash_size);
3047 if (kiblnd_data.kib_peers == NULL)
3050 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++)
3051 INIT_LIST_HEAD(&kiblnd_data.kib_peers[i]);
3053 spin_lock_init(&kiblnd_data.kib_connd_lock);
3054 INIT_LIST_HEAD(&kiblnd_data.kib_connd_conns);
3055 INIT_LIST_HEAD(&kiblnd_data.kib_connd_zombies);
3056 INIT_LIST_HEAD(&kiblnd_data.kib_reconn_list);
3057 INIT_LIST_HEAD(&kiblnd_data.kib_reconn_wait);
3059 init_waitqueue_head(&kiblnd_data.kib_connd_waitq);
3060 init_waitqueue_head(&kiblnd_data.kib_failover_waitq);
3062 kiblnd_data.kib_scheds = cfs_percpt_alloc(lnet_cpt_table(),
3064 if (kiblnd_data.kib_scheds == NULL)
3067 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
3070 spin_lock_init(&sched->ibs_lock);
3071 INIT_LIST_HEAD(&sched->ibs_conns);
3072 init_waitqueue_head(&sched->ibs_waitq);
3074 nthrs = cfs_cpt_weight(lnet_cpt_table(), i);
3075 if (*kiblnd_tunables.kib_nscheds > 0) {
3076 nthrs = min(nthrs, *kiblnd_tunables.kib_nscheds);
3078 /* max to half of CPUs, another half is reserved for
3079 * upper layer modules */
3080 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
3083 sched->ibs_nthreads_max = nthrs;
3087 kiblnd_data.kib_error_qpa.qp_state = IB_QPS_ERR;
3089 /* lists/ptrs/locks initialised */
3090 kiblnd_data.kib_init = IBLND_INIT_DATA;
3091 /*****************************************************/
3093 rc = kiblnd_thread_start(kiblnd_connd, NULL, "kiblnd_connd");
3095 CERROR("Can't spawn o2iblnd connd: %d\n", rc);
3099 if (*kiblnd_tunables.kib_dev_failover != 0)
3100 rc = kiblnd_thread_start(kiblnd_failover_thread, ns,
3104 CERROR("Can't spawn o2iblnd failover thread: %d\n", rc);
3108 /* flag everything initialised */
3109 kiblnd_data.kib_init = IBLND_INIT_ALL;
3110 /*****************************************************/
3115 kiblnd_base_shutdown();
3120 kiblnd_start_schedulers(struct kib_sched_info *sched)
3126 if (sched->ibs_nthreads == 0) {
3127 if (*kiblnd_tunables.kib_nscheds > 0) {
3128 nthrs = sched->ibs_nthreads_max;
3130 nthrs = cfs_cpt_weight(lnet_cpt_table(),
3132 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
3133 nthrs = min(IBLND_N_SCHED_HIGH, nthrs);
3136 LASSERT(sched->ibs_nthreads <= sched->ibs_nthreads_max);
3137 /* increase one thread if there is new interface */
3138 nthrs = (sched->ibs_nthreads < sched->ibs_nthreads_max);
3141 for (i = 0; i < nthrs; i++) {
3144 id = KIB_THREAD_ID(sched->ibs_cpt, sched->ibs_nthreads + i);
3145 snprintf(name, sizeof(name), "kiblnd_sd_%02ld_%02ld",
3146 KIB_THREAD_CPT(id), KIB_THREAD_TID(id));
3147 rc = kiblnd_thread_start(kiblnd_scheduler, (void *)id, name);
3151 CERROR("Can't spawn thread %d for scheduler[%d]: %d\n",
3152 sched->ibs_cpt, sched->ibs_nthreads + i, rc);
3156 sched->ibs_nthreads += i;
3160 static int kiblnd_dev_start_threads(struct kib_dev *dev, u32 *cpts, int ncpts)
3166 for (i = 0; i < ncpts; i++) {
3167 struct kib_sched_info *sched;
3169 cpt = (cpts == NULL) ? i : cpts[i];
3170 sched = kiblnd_data.kib_scheds[cpt];
3172 if (sched->ibs_nthreads > 0)
3175 rc = kiblnd_start_schedulers(kiblnd_data.kib_scheds[cpt]);
3177 CERROR("Failed to start scheduler threads for %s\n",
3186 kiblnd_startup(struct lnet_ni *ni)
3189 struct lnet_inetdev *ifaces = NULL;
3190 struct kib_dev *ibdev = NULL;
3191 struct kib_net *net;
3192 unsigned long flags;
3196 LASSERT (ni->ni_net->net_lnd == &the_o2iblnd);
3198 if (kiblnd_data.kib_init == IBLND_INIT_NOTHING) {
3199 rc = kiblnd_base_startup(ni->ni_net_ns);
3204 LIBCFS_ALLOC(net, sizeof(*net));
3209 net->ibn_incarnation = ktime_get_real_ns() / NSEC_PER_USEC;
3211 kiblnd_tunables_setup(ni);
3214 * ni_interfaces is only to support legacy pre Multi-Rail
3215 * tcp bonding for ksocklnd. Multi-Rail wants each secondary
3216 * IP to be treated as an unique 'struct ni' interfaces instead.
3218 if (ni->ni_interfaces[0] != NULL) {
3219 /* Use the IPoIB interface specified in 'networks=' */
3220 if (ni->ni_interfaces[1] != NULL) {
3221 CERROR("ko2iblnd: Multiple interfaces not supported\n");
3225 ifname = ni->ni_interfaces[0];
3227 ifname = *kiblnd_tunables.kib_default_ipif;
3230 if (strlen(ifname) >= sizeof(ibdev->ibd_ifname)) {
3231 CERROR("IPoIB interface name too long: %s\n", ifname);
3235 rc = lnet_inet_enumerate(&ifaces, ni->ni_net_ns);
3239 for (i = 0; i < rc; i++) {
3240 if (strcmp(ifname, ifaces[i].li_name) == 0)
3245 CERROR("ko2iblnd: No matching interfaces\n");
3250 LIBCFS_ALLOC(ibdev, sizeof(*ibdev));
3256 ibdev->ibd_ifip = ifaces[i].li_ipaddr;
3257 strlcpy(ibdev->ibd_ifname, ifaces[i].li_name,
3258 sizeof(ibdev->ibd_ifname));
3259 ibdev->ibd_can_failover = !!(ifaces[i].li_flags & IFF_MASTER);
3261 INIT_LIST_HEAD(&ibdev->ibd_nets);
3262 INIT_LIST_HEAD(&ibdev->ibd_list); /* not yet in kib_devs */
3263 INIT_LIST_HEAD(&ibdev->ibd_fail_list);
3265 /* initialize the device */
3266 rc = kiblnd_dev_failover(ibdev, ni->ni_net_ns);
3268 CERROR("ko2iblnd: Can't initialize device: rc = %d\n", rc);
3272 list_add_tail(&ibdev->ibd_list, &kiblnd_data.kib_devs);
3274 net->ibn_dev = ibdev;
3275 ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid), ibdev->ibd_ifip);
3277 ni->ni_dev_cpt = ifaces[i].li_cpt;
3279 rc = kiblnd_dev_start_threads(ibdev, ni->ni_cpts, ni->ni_ncpts);
3283 rc = kiblnd_net_init_pools(net, ni, ni->ni_cpts, ni->ni_ncpts);
3285 CERROR("Failed to initialize NI pools: %d\n", rc);
3289 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
3291 list_add_tail(&net->ibn_list, &ibdev->ibd_nets);
3292 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
3294 net->ibn_init = IBLND_INIT_ALL;
3299 if (net != NULL && net->ibn_dev == NULL && ibdev != NULL)
3300 kiblnd_destroy_dev(ibdev);
3303 kiblnd_shutdown(ni);
3305 CDEBUG(D_NET, "kiblnd_startup failed\n");
3309 static struct lnet_lnd the_o2iblnd = {
3310 .lnd_type = O2IBLND,
3311 .lnd_startup = kiblnd_startup,
3312 .lnd_shutdown = kiblnd_shutdown,
3313 .lnd_ctl = kiblnd_ctl,
3314 .lnd_query = kiblnd_query,
3315 .lnd_send = kiblnd_send,
3316 .lnd_recv = kiblnd_recv,
3319 static void __exit ko2iblnd_exit(void)
3321 lnet_unregister_lnd(&the_o2iblnd);
3324 static int __init ko2iblnd_init(void)
3328 CLASSERT(sizeof(struct kib_msg) <= IBLND_MSG_SIZE);
3329 CLASSERT(offsetof(struct kib_msg,
3330 ibm_u.get.ibgm_rd.rd_frags[IBLND_MAX_RDMA_FRAGS]) <=
3332 CLASSERT(offsetof(struct kib_msg,
3333 ibm_u.putack.ibpam_rd.rd_frags[IBLND_MAX_RDMA_FRAGS])
3336 rc = kiblnd_tunables_init();
3340 lnet_register_lnd(&the_o2iblnd);
3345 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3346 MODULE_DESCRIPTION("OpenIB gen2 LNet Network Driver");
3347 MODULE_VERSION("2.8.0");
3348 MODULE_LICENSE("GPL");
3350 module_init(ko2iblnd_init);
3351 module_exit(ko2iblnd_exit);