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 const 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 BUILD_BUG_ON(sizeof(msg->ibm_type) != 1);
260 BUILD_BUG_ON(sizeof(msg->ibm_credits) != 1);
261 msg->ibm_nob = msg_nob;
262 __swab64s(&msg->ibm_srcnid);
263 __swab64s(&msg->ibm_srcstamp);
264 __swab64s(&msg->ibm_dstnid);
265 __swab64s(&msg->ibm_dststamp);
268 if (msg->ibm_srcnid == LNET_NID_ANY) {
269 CERROR("Bad src nid: %s\n", libcfs_nid2str(msg->ibm_srcnid));
273 if (msg_nob < kiblnd_msgtype2size(msg->ibm_type)) {
274 CERROR("Short %s: %d(%d)\n", kiblnd_msgtype2str(msg->ibm_type),
275 msg_nob, kiblnd_msgtype2size(msg->ibm_type));
279 switch (msg->ibm_type) {
281 CERROR("Unknown message type %x\n", msg->ibm_type);
285 case IBLND_MSG_IMMEDIATE:
286 case IBLND_MSG_PUT_REQ:
289 case IBLND_MSG_PUT_ACK:
290 case IBLND_MSG_GET_REQ:
291 if (kiblnd_unpack_rd(msg, flip))
295 case IBLND_MSG_PUT_NAK:
296 case IBLND_MSG_PUT_DONE:
297 case IBLND_MSG_GET_DONE:
299 __swab32s(&msg->ibm_u.completion.ibcm_status);
302 case IBLND_MSG_CONNREQ:
303 case IBLND_MSG_CONNACK:
305 __swab16s(&msg->ibm_u.connparams.ibcp_queue_depth);
306 __swab16s(&msg->ibm_u.connparams.ibcp_max_frags);
307 __swab32s(&msg->ibm_u.connparams.ibcp_max_msg_size);
315 kiblnd_create_peer(struct lnet_ni *ni, struct kib_peer_ni **peerp,
318 struct kib_peer_ni *peer_ni;
319 struct kib_net *net = ni->ni_data;
320 int cpt = lnet_cpt_of_nid(nid, ni);
323 LASSERT(net != NULL);
324 LASSERT(nid != LNET_NID_ANY);
326 LIBCFS_CPT_ALLOC(peer_ni, lnet_cpt_table(), cpt, sizeof(*peer_ni));
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 if (atomic_dec_and_test(&net->ibn_npeers))
376 wake_up_var(&net->ibn_npeers);
380 kiblnd_find_peer_locked(struct lnet_ni *ni, lnet_nid_t nid)
382 /* the caller is responsible for accounting the additional reference
383 * that this creates */
384 struct list_head *peer_list = kiblnd_nid2peerlist(nid);
385 struct list_head *tmp;
386 struct kib_peer_ni *peer_ni;
388 list_for_each(tmp, peer_list) {
390 peer_ni = list_entry(tmp, struct kib_peer_ni, ibp_list);
391 LASSERT(!kiblnd_peer_idle(peer_ni));
394 * Match a peer if its NID and the NID of the local NI it
395 * communicates over are the same. Otherwise don't match
396 * the peer, which will result in a new lnd peer being
399 if (peer_ni->ibp_nid != nid ||
400 peer_ni->ibp_ni->ni_nid != ni->ni_nid)
403 CDEBUG(D_NET, "got peer_ni [%p] -> %s (%d) version: %x\n",
404 peer_ni, libcfs_nid2str(nid),
405 atomic_read(&peer_ni->ibp_refcount),
406 peer_ni->ibp_version);
413 kiblnd_unlink_peer_locked(struct kib_peer_ni *peer_ni)
415 LASSERT(list_empty(&peer_ni->ibp_conns));
417 LASSERT (kiblnd_peer_active(peer_ni));
418 list_del_init(&peer_ni->ibp_list);
419 /* lose peerlist's ref */
420 kiblnd_peer_decref(peer_ni);
424 kiblnd_get_peer_info(struct lnet_ni *ni, int index,
425 lnet_nid_t *nidp, int *count)
427 struct kib_peer_ni *peer_ni;
428 struct list_head *ptmp;
432 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
434 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
436 list_for_each(ptmp, &kiblnd_data.kib_peers[i]) {
438 peer_ni = list_entry(ptmp, struct kib_peer_ni, ibp_list);
439 LASSERT(!kiblnd_peer_idle(peer_ni));
441 if (peer_ni->ibp_ni != ni)
447 *nidp = peer_ni->ibp_nid;
448 *count = atomic_read(&peer_ni->ibp_refcount);
450 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
456 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
461 kiblnd_del_peer_locked(struct kib_peer_ni *peer_ni)
463 struct list_head *ctmp;
464 struct list_head *cnxt;
465 struct kib_conn *conn;
467 if (list_empty(&peer_ni->ibp_conns)) {
468 kiblnd_unlink_peer_locked(peer_ni);
470 list_for_each_safe(ctmp, cnxt, &peer_ni->ibp_conns) {
471 conn = list_entry(ctmp, struct kib_conn, ibc_list);
473 kiblnd_close_conn_locked(conn, 0);
475 /* NB closing peer_ni's last conn unlinked it. */
477 /* NB peer_ni now unlinked; might even be freed if the peer_ni table had the
482 kiblnd_del_peer(struct lnet_ni *ni, lnet_nid_t nid)
485 struct list_head *ptmp;
486 struct list_head *pnxt;
487 struct kib_peer_ni *peer_ni;
494 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
496 if (nid != LNET_NID_ANY) {
497 lo = hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
500 hi = kiblnd_data.kib_peer_hash_size - 1;
503 for (i = lo; i <= hi; i++) {
504 list_for_each_safe(ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
505 peer_ni = list_entry(ptmp, struct kib_peer_ni, ibp_list);
506 LASSERT(!kiblnd_peer_idle(peer_ni));
508 if (peer_ni->ibp_ni != ni)
511 if (!(nid == LNET_NID_ANY || peer_ni->ibp_nid == nid))
514 if (!list_empty(&peer_ni->ibp_tx_queue)) {
515 LASSERT(list_empty(&peer_ni->ibp_conns));
517 list_splice_init(&peer_ni->ibp_tx_queue,
521 kiblnd_del_peer_locked(peer_ni);
522 rc = 0; /* matched something */
526 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
528 kiblnd_txlist_done(&zombies, -EIO, LNET_MSG_STATUS_LOCAL_ERROR);
533 static struct kib_conn *
534 kiblnd_get_conn_by_idx(struct lnet_ni *ni, int index)
536 struct kib_peer_ni *peer_ni;
537 struct list_head *ptmp;
538 struct kib_conn *conn;
539 struct list_head *ctmp;
543 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
545 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
546 list_for_each(ptmp, &kiblnd_data.kib_peers[i]) {
548 peer_ni = list_entry(ptmp, struct kib_peer_ni, ibp_list);
549 LASSERT(!kiblnd_peer_idle(peer_ni));
551 if (peer_ni->ibp_ni != ni)
554 list_for_each(ctmp, &peer_ni->ibp_conns) {
558 conn = list_entry(ctmp, struct kib_conn, ibc_list);
559 kiblnd_conn_addref(conn);
560 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
567 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
572 kiblnd_debug_rx(struct kib_rx *rx)
574 CDEBUG(D_CONSOLE, " %p msg_type %x cred %d\n",
575 rx, rx->rx_msg->ibm_type,
576 rx->rx_msg->ibm_credits);
580 kiblnd_debug_tx(struct kib_tx *tx)
582 CDEBUG(D_CONSOLE, " %p snd %d q %d w %d rc %d dl %lld "
583 "cookie %#llx msg %s%s type %x cred %d\n",
584 tx, tx->tx_sending, tx->tx_queued, tx->tx_waiting,
585 tx->tx_status, ktime_to_ns(tx->tx_deadline), tx->tx_cookie,
586 tx->tx_lntmsg[0] == NULL ? "-" : "!",
587 tx->tx_lntmsg[1] == NULL ? "-" : "!",
588 tx->tx_msg->ibm_type, tx->tx_msg->ibm_credits);
592 kiblnd_debug_conn(struct kib_conn *conn)
594 struct list_head *tmp;
597 spin_lock(&conn->ibc_lock);
599 CDEBUG(D_CONSOLE, "conn[%d] %p [version %x] -> %s:\n",
600 atomic_read(&conn->ibc_refcount), conn,
601 conn->ibc_version, libcfs_nid2str(conn->ibc_peer->ibp_nid));
602 CDEBUG(D_CONSOLE, " state %d nposted %d/%d cred %d o_cred %d "
603 " r_cred %d\n", conn->ibc_state, conn->ibc_noops_posted,
604 conn->ibc_nsends_posted, conn->ibc_credits,
605 conn->ibc_outstanding_credits, conn->ibc_reserved_credits);
606 CDEBUG(D_CONSOLE, " comms_err %d\n", conn->ibc_comms_error);
608 CDEBUG(D_CONSOLE, " early_rxs:\n");
609 list_for_each(tmp, &conn->ibc_early_rxs)
610 kiblnd_debug_rx(list_entry(tmp, struct kib_rx, rx_list));
612 CDEBUG(D_CONSOLE, " tx_noops:\n");
613 list_for_each(tmp, &conn->ibc_tx_noops)
614 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
616 CDEBUG(D_CONSOLE, " tx_queue_nocred:\n");
617 list_for_each(tmp, &conn->ibc_tx_queue_nocred)
618 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
620 CDEBUG(D_CONSOLE, " tx_queue_rsrvd:\n");
621 list_for_each(tmp, &conn->ibc_tx_queue_rsrvd)
622 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
624 CDEBUG(D_CONSOLE, " tx_queue:\n");
625 list_for_each(tmp, &conn->ibc_tx_queue)
626 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
628 CDEBUG(D_CONSOLE, " active_txs:\n");
629 list_for_each(tmp, &conn->ibc_active_txs)
630 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
632 CDEBUG(D_CONSOLE, " rxs:\n");
633 for (i = 0; i < IBLND_RX_MSGS(conn); i++)
634 kiblnd_debug_rx(&conn->ibc_rxs[i]);
636 spin_unlock(&conn->ibc_lock);
640 kiblnd_translate_mtu(int value)
661 kiblnd_setup_mtu_locked(struct rdma_cm_id *cmid)
665 /* XXX There is no path record for iWARP, set by netdev->change_mtu? */
666 if (cmid->route.path_rec == NULL)
669 mtu = kiblnd_translate_mtu(*kiblnd_tunables.kib_ib_mtu);
672 cmid->route.path_rec->mtu = mtu;
676 kiblnd_get_completion_vector(struct kib_conn *conn, int cpt)
684 vectors = conn->ibc_cmid->device->num_comp_vectors;
688 mask = cfs_cpt_cpumask(lnet_cpt_table(), cpt);
690 /* hash NID to CPU id in this partition... */
691 ibp_nid = conn->ibc_peer->ibp_nid;
692 off = do_div(ibp_nid, cpumask_weight(*mask));
693 for_each_cpu(i, *mask) {
703 * Get the scheduler bound to this CPT. If the scheduler has no
704 * threads, which means that the CPT has no CPUs, then grab the
705 * next scheduler that we can use.
707 * This case would be triggered if a NUMA node is configured with
708 * no associated CPUs.
710 static struct kib_sched_info *
711 kiblnd_get_scheduler(int cpt)
713 struct kib_sched_info *sched;
716 sched = kiblnd_data.kib_scheds[cpt];
718 if (sched->ibs_nthreads > 0)
721 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
722 if (sched->ibs_nthreads > 0) {
723 CDEBUG(D_NET, "scheduler[%d] has no threads. selected scheduler[%d]\n",
724 cpt, sched->ibs_cpt);
732 static unsigned int kiblnd_send_wrs(struct kib_conn *conn)
735 * One WR for the LNet message
736 * And ibc_max_frags for the transfer WRs
739 int multiplier = 1 + conn->ibc_max_frags;
740 enum kib_dev_caps dev_caps = conn->ibc_hdev->ibh_dev->ibd_dev_caps;
742 /* FastReg needs two extra WRs for map and invalidate */
743 if (dev_caps & IBLND_DEV_CAPS_FASTREG_ENABLED)
746 /* account for a maximum of ibc_queue_depth in-flight transfers */
747 ret = multiplier * conn->ibc_queue_depth;
749 if (ret > conn->ibc_hdev->ibh_max_qp_wr) {
750 CDEBUG(D_NET, "peer_credits %u will result in send work "
751 "request size %d larger than maximum %d device "
752 "can handle\n", conn->ibc_queue_depth, ret,
753 conn->ibc_hdev->ibh_max_qp_wr);
754 conn->ibc_queue_depth =
755 conn->ibc_hdev->ibh_max_qp_wr / multiplier;
758 /* don't go beyond the maximum the device can handle */
759 return min(ret, conn->ibc_hdev->ibh_max_qp_wr);
763 kiblnd_create_conn(struct kib_peer_ni *peer_ni, struct rdma_cm_id *cmid,
764 int state, int version)
767 * If the new conn is created successfully it takes over the caller's
768 * ref on 'peer_ni'. It also "owns" 'cmid' and destroys it when it itself
769 * is destroyed. On failure, the caller's ref on 'peer_ni' remains and
770 * she must dispose of 'cmid'. (Actually I'd block forever if I tried
771 * to destroy 'cmid' here since I'm called from the CM which still has
772 * its ref on 'cmid'). */
773 rwlock_t *glock = &kiblnd_data.kib_global_lock;
774 struct kib_net *net = peer_ni->ibp_ni->ni_data;
776 struct ib_qp_init_attr init_qp_attr = {};
777 struct kib_sched_info *sched;
778 #ifdef HAVE_IB_CQ_INIT_ATTR
779 struct ib_cq_init_attr cq_attr = {};
781 struct kib_conn *conn;
788 LASSERT(net != NULL);
789 LASSERT(!in_interrupt());
793 cpt = lnet_cpt_of_nid(peer_ni->ibp_nid, peer_ni->ibp_ni);
794 sched = kiblnd_get_scheduler(cpt);
797 CERROR("no schedulers available. node is unhealthy\n");
802 * The cpt might have changed if we ended up selecting a non cpt
803 * native scheduler. So use the scheduler's cpt instead.
805 cpt = sched->ibs_cpt;
807 LIBCFS_CPT_ALLOC(conn, lnet_cpt_table(), cpt, sizeof(*conn));
809 CERROR("Can't allocate connection for %s\n",
810 libcfs_nid2str(peer_ni->ibp_nid));
814 conn->ibc_state = IBLND_CONN_INIT;
815 conn->ibc_version = version;
816 conn->ibc_peer = peer_ni; /* I take the caller's ref */
817 cmid->context = conn; /* for future CM callbacks */
818 conn->ibc_cmid = cmid;
819 conn->ibc_max_frags = peer_ni->ibp_max_frags;
820 conn->ibc_queue_depth = peer_ni->ibp_queue_depth;
821 conn->ibc_rxs = NULL;
822 conn->ibc_rx_pages = NULL;
824 INIT_LIST_HEAD(&conn->ibc_early_rxs);
825 INIT_LIST_HEAD(&conn->ibc_tx_noops);
826 INIT_LIST_HEAD(&conn->ibc_tx_queue);
827 INIT_LIST_HEAD(&conn->ibc_tx_queue_rsrvd);
828 INIT_LIST_HEAD(&conn->ibc_tx_queue_nocred);
829 INIT_LIST_HEAD(&conn->ibc_active_txs);
830 INIT_LIST_HEAD(&conn->ibc_zombie_txs);
831 spin_lock_init(&conn->ibc_lock);
833 LIBCFS_CPT_ALLOC(conn->ibc_connvars, lnet_cpt_table(), cpt,
834 sizeof(*conn->ibc_connvars));
835 if (conn->ibc_connvars == NULL) {
836 CERROR("Can't allocate in-progress connection state\n");
840 write_lock_irqsave(glock, flags);
841 if (dev->ibd_failover) {
842 write_unlock_irqrestore(glock, flags);
843 CERROR("%s: failover in progress\n", dev->ibd_ifname);
847 if (dev->ibd_hdev->ibh_ibdev != cmid->device) {
848 /* wakeup failover thread and teardown connection */
849 if (kiblnd_dev_can_failover(dev)) {
850 list_add_tail(&dev->ibd_fail_list,
851 &kiblnd_data.kib_failed_devs);
852 wake_up(&kiblnd_data.kib_failover_waitq);
855 write_unlock_irqrestore(glock, flags);
856 CERROR("cmid HCA(%s), kib_dev(%s) need failover\n",
857 cmid->device->name, dev->ibd_ifname);
861 kiblnd_hdev_addref_locked(dev->ibd_hdev);
862 conn->ibc_hdev = dev->ibd_hdev;
864 kiblnd_setup_mtu_locked(cmid);
866 write_unlock_irqrestore(glock, flags);
868 #ifdef HAVE_IB_CQ_INIT_ATTR
869 cq_attr.cqe = IBLND_CQ_ENTRIES(conn);
870 cq_attr.comp_vector = kiblnd_get_completion_vector(conn, cpt);
871 cq = ib_create_cq(cmid->device,
872 kiblnd_cq_completion, kiblnd_cq_event, conn,
875 cq = ib_create_cq(cmid->device,
876 kiblnd_cq_completion, kiblnd_cq_event, conn,
877 IBLND_CQ_ENTRIES(conn),
878 kiblnd_get_completion_vector(conn, cpt));
882 * on MLX-5 (possibly MLX-4 as well) this error could be
883 * hit if the concurrent_sends and/or peer_tx_credits is set
884 * too high. Or due to an MLX-5 bug which tries to
885 * allocate 256kb via kmalloc for WR cookie array
887 CERROR("Failed to create CQ with %d CQEs: %ld\n",
888 IBLND_CQ_ENTRIES(conn), PTR_ERR(cq));
894 rc = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
896 CERROR("Can't request completion notification: %d\n", rc);
900 init_qp_attr.event_handler = kiblnd_qp_event;
901 init_qp_attr.qp_context = conn;
902 init_qp_attr.cap.max_send_sge = *kiblnd_tunables.kib_wrq_sge;
903 init_qp_attr.cap.max_recv_sge = 1;
904 init_qp_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
905 init_qp_attr.qp_type = IB_QPT_RC;
906 init_qp_attr.send_cq = cq;
907 init_qp_attr.recv_cq = cq;
909 * kiblnd_send_wrs() can change the connection's queue depth if
910 * the maximum work requests for the device is maxed out
912 init_qp_attr.cap.max_send_wr = kiblnd_send_wrs(conn);
913 init_qp_attr.cap.max_recv_wr = IBLND_RECV_WRS(conn);
915 rc = rdma_create_qp(cmid, conn->ibc_hdev->ibh_pd, &init_qp_attr);
917 CERROR("Can't create QP: %d, send_wr: %d, recv_wr: %d, "
918 "send_sge: %d, recv_sge: %d\n",
919 rc, init_qp_attr.cap.max_send_wr,
920 init_qp_attr.cap.max_recv_wr,
921 init_qp_attr.cap.max_send_sge,
922 init_qp_attr.cap.max_recv_sge);
926 conn->ibc_sched = sched;
928 if (conn->ibc_queue_depth != peer_ni->ibp_queue_depth)
929 CWARN("peer %s - queue depth reduced from %u to %u"
930 " to allow for qp creation\n",
931 libcfs_nid2str(peer_ni->ibp_nid),
932 peer_ni->ibp_queue_depth,
933 conn->ibc_queue_depth);
935 LIBCFS_CPT_ALLOC(conn->ibc_rxs, lnet_cpt_table(), cpt,
936 IBLND_RX_MSGS(conn) * sizeof(struct kib_rx));
937 if (conn->ibc_rxs == NULL) {
938 CERROR("Cannot allocate RX buffers\n");
942 rc = kiblnd_alloc_pages(&conn->ibc_rx_pages, cpt,
943 IBLND_RX_MSG_PAGES(conn));
947 kiblnd_map_rx_descs(conn);
949 /* 1 ref for caller and each rxmsg */
950 atomic_set(&conn->ibc_refcount, 1 + IBLND_RX_MSGS(conn));
951 conn->ibc_nrx = IBLND_RX_MSGS(conn);
954 for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
955 rc = kiblnd_post_rx(&conn->ibc_rxs[i], IBLND_POSTRX_NO_CREDIT);
957 CERROR("Can't post rxmsg: %d\n", rc);
959 /* Make posted receives complete */
960 kiblnd_abort_receives(conn);
962 /* correct # of posted buffers
963 * NB locking needed now I'm racing with completion */
964 spin_lock_irqsave(&sched->ibs_lock, flags);
965 conn->ibc_nrx -= IBLND_RX_MSGS(conn) - i;
966 spin_unlock_irqrestore(&sched->ibs_lock, flags);
968 /* cmid will be destroyed by CM(ofed) after cm_callback
969 * returned, so we can't refer it anymore
970 * (by kiblnd_connd()->kiblnd_destroy_conn) */
971 rdma_destroy_qp(conn->ibc_cmid);
972 conn->ibc_cmid = NULL;
974 /* Drop my own and unused rxbuffer refcounts */
975 while (i++ <= IBLND_RX_MSGS(conn))
976 kiblnd_conn_decref(conn);
982 /* Init successful! */
983 LASSERT (state == IBLND_CONN_ACTIVE_CONNECT ||
984 state == IBLND_CONN_PASSIVE_WAIT);
985 conn->ibc_state = state;
988 atomic_inc(&net->ibn_nconns);
992 kiblnd_destroy_conn(conn);
993 LIBCFS_FREE(conn, sizeof(*conn));
999 kiblnd_destroy_conn(struct kib_conn *conn)
1001 struct rdma_cm_id *cmid = conn->ibc_cmid;
1002 struct kib_peer_ni *peer_ni = conn->ibc_peer;
1004 LASSERT (!in_interrupt());
1005 LASSERT (atomic_read(&conn->ibc_refcount) == 0);
1006 LASSERT(list_empty(&conn->ibc_early_rxs));
1007 LASSERT(list_empty(&conn->ibc_tx_noops));
1008 LASSERT(list_empty(&conn->ibc_tx_queue));
1009 LASSERT(list_empty(&conn->ibc_tx_queue_rsrvd));
1010 LASSERT(list_empty(&conn->ibc_tx_queue_nocred));
1011 LASSERT(list_empty(&conn->ibc_active_txs));
1012 LASSERT (conn->ibc_noops_posted == 0);
1013 LASSERT (conn->ibc_nsends_posted == 0);
1015 switch (conn->ibc_state) {
1017 /* conn must be completely disengaged from the network */
1020 case IBLND_CONN_DISCONNECTED:
1021 /* connvars should have been freed already */
1022 LASSERT (conn->ibc_connvars == NULL);
1025 case IBLND_CONN_INIT:
1029 /* conn->ibc_cmid might be destroyed by CM already */
1030 if (cmid != NULL && cmid->qp != NULL)
1031 rdma_destroy_qp(cmid);
1034 ib_destroy_cq(conn->ibc_cq);
1036 kiblnd_txlist_done(&conn->ibc_zombie_txs, -ECONNABORTED,
1037 LNET_MSG_STATUS_OK);
1039 if (conn->ibc_rx_pages != NULL)
1040 kiblnd_unmap_rx_descs(conn);
1042 if (conn->ibc_rxs != NULL)
1043 CFS_FREE_PTR_ARRAY(conn->ibc_rxs, IBLND_RX_MSGS(conn));
1045 if (conn->ibc_connvars != NULL)
1046 LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
1048 if (conn->ibc_hdev != NULL)
1049 kiblnd_hdev_decref(conn->ibc_hdev);
1051 /* See CAVEAT EMPTOR above in kiblnd_create_conn */
1052 if (conn->ibc_state != IBLND_CONN_INIT) {
1053 struct kib_net *net = peer_ni->ibp_ni->ni_data;
1055 kiblnd_peer_decref(peer_ni);
1056 rdma_destroy_id(cmid);
1057 atomic_dec(&net->ibn_nconns);
1062 kiblnd_close_peer_conns_locked(struct kib_peer_ni *peer_ni, int why)
1064 struct kib_conn *conn;
1065 struct list_head *ctmp;
1066 struct list_head *cnxt;
1069 list_for_each_safe(ctmp, cnxt, &peer_ni->ibp_conns) {
1070 conn = list_entry(ctmp, struct kib_conn, ibc_list);
1072 CDEBUG(D_NET, "Closing conn -> %s, "
1073 "version: %x, reason: %d\n",
1074 libcfs_nid2str(peer_ni->ibp_nid),
1075 conn->ibc_version, why);
1077 kiblnd_close_conn_locked(conn, why);
1085 kiblnd_close_stale_conns_locked(struct kib_peer_ni *peer_ni,
1086 int version, __u64 incarnation)
1088 struct kib_conn *conn;
1089 struct list_head *ctmp;
1090 struct list_head *cnxt;
1093 list_for_each_safe(ctmp, cnxt, &peer_ni->ibp_conns) {
1094 conn = list_entry(ctmp, struct kib_conn, ibc_list);
1096 if (conn->ibc_version == version &&
1097 conn->ibc_incarnation == incarnation)
1100 CDEBUG(D_NET, "Closing stale conn -> %s version: %x, "
1101 "incarnation:%#llx(%x, %#llx)\n",
1102 libcfs_nid2str(peer_ni->ibp_nid),
1103 conn->ibc_version, conn->ibc_incarnation,
1104 version, incarnation);
1106 kiblnd_close_conn_locked(conn, -ESTALE);
1114 kiblnd_close_matching_conns(struct lnet_ni *ni, lnet_nid_t nid)
1116 struct kib_peer_ni *peer_ni;
1117 struct list_head *ptmp;
1118 struct list_head *pnxt;
1122 unsigned long flags;
1125 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1127 if (nid != LNET_NID_ANY)
1128 lo = hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
1131 hi = kiblnd_data.kib_peer_hash_size - 1;
1134 for (i = lo; i <= hi; i++) {
1135 list_for_each_safe(ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
1137 peer_ni = list_entry(ptmp, struct kib_peer_ni, ibp_list);
1138 LASSERT(!kiblnd_peer_idle(peer_ni));
1140 if (peer_ni->ibp_ni != ni)
1143 if (!(nid == LNET_NID_ANY || nid == peer_ni->ibp_nid))
1146 count += kiblnd_close_peer_conns_locked(peer_ni, 0);
1150 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1152 /* wildcards always succeed */
1153 if (nid == LNET_NID_ANY)
1156 return (count == 0) ? -ENOENT : 0;
1160 kiblnd_ctl(struct lnet_ni *ni, unsigned int cmd, void *arg)
1162 struct libcfs_ioctl_data *data = arg;
1166 case IOC_LIBCFS_GET_PEER: {
1170 rc = kiblnd_get_peer_info(ni, data->ioc_count,
1172 data->ioc_nid = nid;
1173 data->ioc_count = count;
1177 case IOC_LIBCFS_DEL_PEER: {
1178 rc = kiblnd_del_peer(ni, data->ioc_nid);
1181 case IOC_LIBCFS_GET_CONN: {
1182 struct kib_conn *conn;
1185 conn = kiblnd_get_conn_by_idx(ni, data->ioc_count);
1191 LASSERT(conn->ibc_cmid != NULL);
1192 data->ioc_nid = conn->ibc_peer->ibp_nid;
1193 if (conn->ibc_cmid->route.path_rec == NULL)
1194 data->ioc_u32[0] = 0; /* iWarp has no path MTU */
1197 ib_mtu_enum_to_int(conn->ibc_cmid->route.path_rec->mtu);
1198 kiblnd_conn_decref(conn);
1201 case IOC_LIBCFS_CLOSE_CONNECTION: {
1202 rc = kiblnd_close_matching_conns(ni, data->ioc_nid);
1214 kiblnd_free_pages(struct kib_pages *p)
1216 int npages = p->ibp_npages;
1219 for (i = 0; i < npages; i++) {
1220 if (p->ibp_pages[i] != NULL)
1221 __free_page(p->ibp_pages[i]);
1224 LIBCFS_FREE(p, offsetof(struct kib_pages, ibp_pages[npages]));
1228 kiblnd_alloc_pages(struct kib_pages **pp, int cpt, int npages)
1230 struct kib_pages *p;
1233 LIBCFS_CPT_ALLOC(p, lnet_cpt_table(), cpt,
1234 offsetof(struct kib_pages, ibp_pages[npages]));
1236 CERROR("Can't allocate descriptor for %d pages\n", npages);
1240 memset(p, 0, offsetof(struct kib_pages, ibp_pages[npages]));
1241 p->ibp_npages = npages;
1243 for (i = 0; i < npages; i++) {
1244 p->ibp_pages[i] = cfs_page_cpt_alloc(lnet_cpt_table(), cpt,
1246 if (p->ibp_pages[i] == NULL) {
1247 CERROR("Can't allocate page %d of %d\n", i, npages);
1248 kiblnd_free_pages(p);
1258 kiblnd_unmap_rx_descs(struct kib_conn *conn)
1263 LASSERT (conn->ibc_rxs != NULL);
1264 LASSERT (conn->ibc_hdev != NULL);
1266 for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
1267 rx = &conn->ibc_rxs[i];
1269 LASSERT(rx->rx_nob >= 0); /* not posted */
1271 kiblnd_dma_unmap_single(conn->ibc_hdev->ibh_ibdev,
1272 KIBLND_UNMAP_ADDR(rx, rx_msgunmap,
1274 IBLND_MSG_SIZE, DMA_FROM_DEVICE);
1277 kiblnd_free_pages(conn->ibc_rx_pages);
1279 conn->ibc_rx_pages = NULL;
1283 kiblnd_map_rx_descs(struct kib_conn *conn)
1291 for (pg_off = ipg = i = 0; i < IBLND_RX_MSGS(conn); i++) {
1292 pg = conn->ibc_rx_pages->ibp_pages[ipg];
1293 rx = &conn->ibc_rxs[i];
1296 rx->rx_msg = (struct kib_msg *)(((char *)page_address(pg)) + pg_off);
1299 kiblnd_dma_map_single(conn->ibc_hdev->ibh_ibdev,
1300 rx->rx_msg, IBLND_MSG_SIZE,
1302 LASSERT(!kiblnd_dma_mapping_error(conn->ibc_hdev->ibh_ibdev,
1304 KIBLND_UNMAP_ADDR_SET(rx, rx_msgunmap, rx->rx_msgaddr);
1306 CDEBUG(D_NET, "rx %d: %p %#llx(%#llx)\n",
1307 i, rx->rx_msg, rx->rx_msgaddr,
1308 (__u64)(page_to_phys(pg) + pg_off));
1310 pg_off += IBLND_MSG_SIZE;
1311 LASSERT(pg_off <= PAGE_SIZE);
1313 if (pg_off == PAGE_SIZE) {
1316 LASSERT(ipg <= IBLND_RX_MSG_PAGES(conn));
1322 kiblnd_unmap_tx_pool(struct kib_tx_pool *tpo)
1324 struct kib_hca_dev *hdev = tpo->tpo_hdev;
1328 LASSERT (tpo->tpo_pool.po_allocated == 0);
1333 for (i = 0; i < tpo->tpo_pool.po_size; i++) {
1334 tx = &tpo->tpo_tx_descs[i];
1335 kiblnd_dma_unmap_single(hdev->ibh_ibdev,
1336 KIBLND_UNMAP_ADDR(tx, tx_msgunmap,
1338 IBLND_MSG_SIZE, DMA_TO_DEVICE);
1341 kiblnd_hdev_decref(hdev);
1342 tpo->tpo_hdev = NULL;
1345 static struct kib_hca_dev *
1346 kiblnd_current_hdev(struct kib_dev *dev)
1348 struct kib_hca_dev *hdev;
1349 unsigned long flags;
1352 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1353 while (dev->ibd_failover) {
1354 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1356 CDEBUG(D_NET, "%s: Wait for failover\n",
1358 schedule_timeout_interruptible(cfs_time_seconds(1) / 100);
1360 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1363 kiblnd_hdev_addref_locked(dev->ibd_hdev);
1364 hdev = dev->ibd_hdev;
1366 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1372 kiblnd_map_tx_pool(struct kib_tx_pool *tpo)
1374 struct kib_pages *txpgs = tpo->tpo_tx_pages;
1375 struct kib_pool *pool = &tpo->tpo_pool;
1376 struct kib_net *net = pool->po_owner->ps_net;
1377 struct kib_dev *dev;
1384 LASSERT (net != NULL);
1388 /* pre-mapped messages are not bigger than 1 page */
1389 BUILD_BUG_ON(IBLND_MSG_SIZE > PAGE_SIZE);
1391 /* No fancy arithmetic when we do the buffer calculations */
1392 BUILD_BUG_ON(PAGE_SIZE % IBLND_MSG_SIZE != 0);
1394 tpo->tpo_hdev = kiblnd_current_hdev(dev);
1396 for (ipage = page_offset = i = 0; i < pool->po_size; i++) {
1397 page = txpgs->ibp_pages[ipage];
1398 tx = &tpo->tpo_tx_descs[i];
1400 tx->tx_msg = (struct kib_msg *)(((char *)page_address(page)) +
1403 tx->tx_msgaddr = kiblnd_dma_map_single(tpo->tpo_hdev->ibh_ibdev,
1407 LASSERT(!kiblnd_dma_mapping_error(tpo->tpo_hdev->ibh_ibdev,
1409 KIBLND_UNMAP_ADDR_SET(tx, tx_msgunmap, tx->tx_msgaddr);
1411 list_add(&tx->tx_list, &pool->po_free_list);
1413 page_offset += IBLND_MSG_SIZE;
1414 LASSERT(page_offset <= PAGE_SIZE);
1416 if (page_offset == PAGE_SIZE) {
1419 LASSERT(ipage <= txpgs->ibp_npages);
1425 kiblnd_destroy_fmr_pool(struct kib_fmr_pool *fpo)
1427 LASSERT(fpo->fpo_map_count == 0);
1429 if (fpo->fpo_is_fmr && fpo->fmr.fpo_fmr_pool) {
1430 ib_destroy_fmr_pool(fpo->fmr.fpo_fmr_pool);
1432 struct kib_fast_reg_descriptor *frd, *tmp;
1435 list_for_each_entry_safe(frd, tmp, &fpo->fast_reg.fpo_pool_list,
1437 list_del(&frd->frd_list);
1438 #ifndef HAVE_IB_MAP_MR_SG
1439 ib_free_fast_reg_page_list(frd->frd_frpl);
1441 ib_dereg_mr(frd->frd_mr);
1442 LIBCFS_FREE(frd, sizeof(*frd));
1445 if (i < fpo->fast_reg.fpo_pool_size)
1446 CERROR("FastReg pool still has %d regions registered\n",
1447 fpo->fast_reg.fpo_pool_size - i);
1451 kiblnd_hdev_decref(fpo->fpo_hdev);
1453 LIBCFS_FREE(fpo, sizeof(*fpo));
1457 kiblnd_destroy_fmr_pool_list(struct list_head *head)
1459 struct kib_fmr_pool *fpo, *tmp;
1461 list_for_each_entry_safe(fpo, tmp, head, fpo_list) {
1462 list_del(&fpo->fpo_list);
1463 kiblnd_destroy_fmr_pool(fpo);
1468 kiblnd_fmr_pool_size(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
1471 int size = tunables->lnd_fmr_pool_size / ncpts;
1473 return max(IBLND_FMR_POOL, size);
1477 kiblnd_fmr_flush_trigger(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
1480 int size = tunables->lnd_fmr_flush_trigger / ncpts;
1482 return max(IBLND_FMR_POOL_FLUSH, size);
1485 static int kiblnd_alloc_fmr_pool(struct kib_fmr_poolset *fps,
1486 struct kib_fmr_pool *fpo)
1488 struct ib_fmr_pool_param param = {
1489 .max_pages_per_fmr = LNET_MAX_IOV,
1490 .page_shift = PAGE_SHIFT,
1491 .access = (IB_ACCESS_LOCAL_WRITE |
1492 IB_ACCESS_REMOTE_WRITE),
1493 .pool_size = fps->fps_pool_size,
1494 .dirty_watermark = fps->fps_flush_trigger,
1495 .flush_function = NULL,
1497 .cache = !!fps->fps_cache };
1500 fpo->fmr.fpo_fmr_pool = ib_create_fmr_pool(fpo->fpo_hdev->ibh_pd,
1502 if (IS_ERR(fpo->fmr.fpo_fmr_pool)) {
1503 rc = PTR_ERR(fpo->fmr.fpo_fmr_pool);
1505 CERROR("Failed to create FMR pool: %d\n", rc);
1507 CERROR("FMRs are not supported\n");
1509 fpo->fpo_is_fmr = true;
1514 static int kiblnd_alloc_freg_pool(struct kib_fmr_poolset *fps,
1515 struct kib_fmr_pool *fpo,
1516 enum kib_dev_caps dev_caps)
1518 struct kib_fast_reg_descriptor *frd, *tmp;
1521 fpo->fpo_is_fmr = false;
1523 INIT_LIST_HEAD(&fpo->fast_reg.fpo_pool_list);
1524 fpo->fast_reg.fpo_pool_size = 0;
1525 for (i = 0; i < fps->fps_pool_size; i++) {
1526 LIBCFS_CPT_ALLOC(frd, lnet_cpt_table(), fps->fps_cpt,
1529 CERROR("Failed to allocate a new fast_reg descriptor\n");
1535 #ifndef HAVE_IB_MAP_MR_SG
1536 frd->frd_frpl = ib_alloc_fast_reg_page_list(fpo->fpo_hdev->ibh_ibdev,
1538 if (IS_ERR(frd->frd_frpl)) {
1539 rc = PTR_ERR(frd->frd_frpl);
1540 CERROR("Failed to allocate ib_fast_reg_page_list: %d\n",
1542 frd->frd_frpl = NULL;
1547 #ifdef HAVE_IB_ALLOC_FAST_REG_MR
1548 frd->frd_mr = ib_alloc_fast_reg_mr(fpo->fpo_hdev->ibh_pd,
1552 * it is expected to get here if this is an MLX-5 card.
1553 * MLX-4 cards will always use FMR and MLX-5 cards will
1554 * always use fast_reg. It turns out that some MLX-5 cards
1555 * (possibly due to older FW versions) do not natively support
1556 * gaps. So we will need to track them here.
1558 frd->frd_mr = ib_alloc_mr(fpo->fpo_hdev->ibh_pd,
1559 #ifdef IB_MR_TYPE_SG_GAPS
1560 ((*kiblnd_tunables.kib_use_fastreg_gaps == 1) &&
1561 (dev_caps & IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT)) ?
1562 IB_MR_TYPE_SG_GAPS :
1568 if ((*kiblnd_tunables.kib_use_fastreg_gaps == 1) &&
1569 (dev_caps & IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT))
1570 CWARN("using IB_MR_TYPE_SG_GAPS, expect a performance drop\n");
1572 if (IS_ERR(frd->frd_mr)) {
1573 rc = PTR_ERR(frd->frd_mr);
1574 CERROR("Failed to allocate ib_fast_reg_mr: %d\n", rc);
1579 /* There appears to be a bug in MLX5 code where you must
1580 * invalidate the rkey of a new FastReg pool before first
1581 * using it. Thus, I am marking the FRD invalid here. */
1582 frd->frd_valid = false;
1584 list_add_tail(&frd->frd_list, &fpo->fast_reg.fpo_pool_list);
1585 fpo->fast_reg.fpo_pool_size++;
1592 ib_dereg_mr(frd->frd_mr);
1593 #ifndef HAVE_IB_MAP_MR_SG
1595 ib_free_fast_reg_page_list(frd->frd_frpl);
1597 LIBCFS_FREE(frd, sizeof(*frd));
1600 list_for_each_entry_safe(frd, tmp, &fpo->fast_reg.fpo_pool_list,
1602 list_del(&frd->frd_list);
1603 #ifndef HAVE_IB_MAP_MR_SG
1604 ib_free_fast_reg_page_list(frd->frd_frpl);
1606 ib_dereg_mr(frd->frd_mr);
1607 LIBCFS_FREE(frd, sizeof(*frd));
1613 static int kiblnd_create_fmr_pool(struct kib_fmr_poolset *fps,
1614 struct kib_fmr_pool **pp_fpo)
1616 struct kib_dev *dev = fps->fps_net->ibn_dev;
1617 struct kib_fmr_pool *fpo;
1620 LIBCFS_CPT_ALLOC(fpo, lnet_cpt_table(), fps->fps_cpt, sizeof(*fpo));
1624 memset(fpo, 0, sizeof(*fpo));
1626 fpo->fpo_hdev = kiblnd_current_hdev(dev);
1628 if (dev->ibd_dev_caps & IBLND_DEV_CAPS_FMR_ENABLED)
1629 rc = kiblnd_alloc_fmr_pool(fps, fpo);
1631 rc = kiblnd_alloc_freg_pool(fps, fpo, dev->ibd_dev_caps);
1635 fpo->fpo_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
1636 fpo->fpo_owner = fps;
1642 kiblnd_hdev_decref(fpo->fpo_hdev);
1643 LIBCFS_FREE(fpo, sizeof(*fpo));
1648 kiblnd_fail_fmr_poolset(struct kib_fmr_poolset *fps, struct list_head *zombies)
1650 if (fps->fps_net == NULL) /* intialized? */
1653 spin_lock(&fps->fps_lock);
1655 while (!list_empty(&fps->fps_pool_list)) {
1656 struct kib_fmr_pool *fpo = list_entry(fps->fps_pool_list.next,
1657 struct kib_fmr_pool,
1660 fpo->fpo_failed = 1;
1661 if (fpo->fpo_map_count == 0)
1662 list_move(&fpo->fpo_list, zombies);
1664 list_move(&fpo->fpo_list, &fps->fps_failed_pool_list);
1667 spin_unlock(&fps->fps_lock);
1671 kiblnd_fini_fmr_poolset(struct kib_fmr_poolset *fps)
1673 if (fps->fps_net != NULL) { /* initialized? */
1674 kiblnd_destroy_fmr_pool_list(&fps->fps_failed_pool_list);
1675 kiblnd_destroy_fmr_pool_list(&fps->fps_pool_list);
1680 kiblnd_init_fmr_poolset(struct kib_fmr_poolset *fps, int cpt, int ncpts,
1681 struct kib_net *net,
1682 struct lnet_ioctl_config_o2iblnd_tunables *tunables)
1684 struct kib_fmr_pool *fpo;
1687 memset(fps, 0, sizeof(struct kib_fmr_poolset));
1692 fps->fps_pool_size = kiblnd_fmr_pool_size(tunables, ncpts);
1693 fps->fps_flush_trigger = kiblnd_fmr_flush_trigger(tunables, ncpts);
1694 fps->fps_cache = tunables->lnd_fmr_cache;
1696 spin_lock_init(&fps->fps_lock);
1697 INIT_LIST_HEAD(&fps->fps_pool_list);
1698 INIT_LIST_HEAD(&fps->fps_failed_pool_list);
1700 rc = kiblnd_create_fmr_pool(fps, &fpo);
1702 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1708 kiblnd_fmr_pool_is_idle(struct kib_fmr_pool *fpo, time64_t now)
1710 if (fpo->fpo_map_count != 0) /* still in use */
1712 if (fpo->fpo_failed)
1714 return now >= fpo->fpo_deadline;
1718 kiblnd_map_tx_pages(struct kib_tx *tx, struct kib_rdma_desc *rd)
1720 struct kib_hca_dev *hdev;
1721 __u64 *pages = tx->tx_pages;
1726 hdev = tx->tx_pool->tpo_hdev;
1728 for (i = 0, npages = 0; i < rd->rd_nfrags; i++) {
1729 for (size = 0; size < rd->rd_frags[i].rf_nob;
1730 size += hdev->ibh_page_size) {
1731 pages[npages++] = (rd->rd_frags[i].rf_addr &
1732 hdev->ibh_page_mask) + size;
1740 kiblnd_fmr_pool_unmap(struct kib_fmr *fmr, int status)
1743 struct kib_fmr_pool *fpo = fmr->fmr_pool;
1744 struct kib_fmr_poolset *fps;
1745 time64_t now = ktime_get_seconds();
1746 struct kib_fmr_pool *tmp;
1752 fps = fpo->fpo_owner;
1753 if (fpo->fpo_is_fmr) {
1754 if (fmr->fmr_pfmr) {
1755 ib_fmr_pool_unmap(fmr->fmr_pfmr);
1756 fmr->fmr_pfmr = NULL;
1760 rc = ib_flush_fmr_pool(fpo->fmr.fpo_fmr_pool);
1764 struct kib_fast_reg_descriptor *frd = fmr->fmr_frd;
1767 frd->frd_valid = false;
1768 spin_lock(&fps->fps_lock);
1769 list_add_tail(&frd->frd_list, &fpo->fast_reg.fpo_pool_list);
1770 spin_unlock(&fps->fps_lock);
1771 fmr->fmr_frd = NULL;
1774 fmr->fmr_pool = NULL;
1776 spin_lock(&fps->fps_lock);
1777 fpo->fpo_map_count--; /* decref the pool */
1779 list_for_each_entry_safe(fpo, tmp, &fps->fps_pool_list, fpo_list) {
1780 /* the first pool is persistent */
1781 if (fps->fps_pool_list.next == &fpo->fpo_list)
1784 if (kiblnd_fmr_pool_is_idle(fpo, now)) {
1785 list_move(&fpo->fpo_list, &zombies);
1789 spin_unlock(&fps->fps_lock);
1791 if (!list_empty(&zombies))
1792 kiblnd_destroy_fmr_pool_list(&zombies);
1795 int kiblnd_fmr_pool_map(struct kib_fmr_poolset *fps, struct kib_tx *tx,
1796 struct kib_rdma_desc *rd, u32 nob, u64 iov,
1797 struct kib_fmr *fmr)
1799 struct kib_fmr_pool *fpo;
1800 __u64 *pages = tx->tx_pages;
1802 bool is_rx = (rd != tx->tx_rd);
1803 bool tx_pages_mapped = 0;
1808 spin_lock(&fps->fps_lock);
1809 version = fps->fps_version;
1810 list_for_each_entry(fpo, &fps->fps_pool_list, fpo_list) {
1811 fpo->fpo_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
1812 fpo->fpo_map_count++;
1814 if (fpo->fpo_is_fmr) {
1815 struct ib_pool_fmr *pfmr;
1817 spin_unlock(&fps->fps_lock);
1819 if (!tx_pages_mapped) {
1820 npages = kiblnd_map_tx_pages(tx, rd);
1821 tx_pages_mapped = 1;
1824 pfmr = kib_fmr_pool_map(fpo->fmr.fpo_fmr_pool,
1825 pages, npages, iov);
1826 if (likely(!IS_ERR(pfmr))) {
1827 fmr->fmr_key = is_rx ? pfmr->fmr->rkey
1829 fmr->fmr_frd = NULL;
1830 fmr->fmr_pfmr = pfmr;
1831 fmr->fmr_pool = fpo;
1836 if (!list_empty(&fpo->fast_reg.fpo_pool_list)) {
1837 struct kib_fast_reg_descriptor *frd;
1838 #ifdef HAVE_IB_MAP_MR_SG
1839 struct ib_reg_wr *wr;
1842 struct ib_rdma_wr *wr;
1843 struct ib_fast_reg_page_list *frpl;
1847 frd = list_first_entry(&fpo->fast_reg.fpo_pool_list,
1848 struct kib_fast_reg_descriptor,
1850 list_del(&frd->frd_list);
1851 spin_unlock(&fps->fps_lock);
1853 #ifndef HAVE_IB_MAP_MR_SG
1854 frpl = frd->frd_frpl;
1858 if (!frd->frd_valid) {
1859 struct ib_rdma_wr *inv_wr;
1860 __u32 key = is_rx ? mr->rkey : mr->lkey;
1862 inv_wr = &frd->frd_inv_wr;
1863 memset(inv_wr, 0, sizeof(*inv_wr));
1865 inv_wr->wr.opcode = IB_WR_LOCAL_INV;
1866 inv_wr->wr.wr_id = IBLND_WID_MR;
1867 inv_wr->wr.ex.invalidate_rkey = key;
1870 key = ib_inc_rkey(key);
1871 ib_update_fast_reg_key(mr, key);
1874 #ifdef HAVE_IB_MAP_MR_SG
1875 #ifdef HAVE_IB_MAP_MR_SG_5ARGS
1876 n = ib_map_mr_sg(mr, tx->tx_frags,
1877 rd->rd_nfrags, NULL, PAGE_SIZE);
1879 n = ib_map_mr_sg(mr, tx->tx_frags,
1880 rd->rd_nfrags, PAGE_SIZE);
1882 if (unlikely(n != rd->rd_nfrags)) {
1883 CERROR("Failed to map mr %d/%d "
1884 "elements\n", n, rd->rd_nfrags);
1885 return n < 0 ? n : -EINVAL;
1888 wr = &frd->frd_fastreg_wr;
1889 memset(wr, 0, sizeof(*wr));
1891 wr->wr.opcode = IB_WR_REG_MR;
1892 wr->wr.wr_id = IBLND_WID_MR;
1894 wr->wr.send_flags = 0;
1896 wr->key = is_rx ? mr->rkey : mr->lkey;
1897 wr->access = (IB_ACCESS_LOCAL_WRITE |
1898 IB_ACCESS_REMOTE_WRITE);
1900 if (!tx_pages_mapped) {
1901 npages = kiblnd_map_tx_pages(tx, rd);
1902 tx_pages_mapped = 1;
1905 LASSERT(npages <= frpl->max_page_list_len);
1906 memcpy(frpl->page_list, pages,
1907 sizeof(*pages) * npages);
1909 /* Prepare FastReg WR */
1910 wr = &frd->frd_fastreg_wr;
1911 memset(wr, 0, sizeof(*wr));
1913 wr->wr.opcode = IB_WR_FAST_REG_MR;
1914 wr->wr.wr_id = IBLND_WID_MR;
1916 wr->wr.wr.fast_reg.iova_start = iov;
1917 wr->wr.wr.fast_reg.page_list = frpl;
1918 wr->wr.wr.fast_reg.page_list_len = npages;
1919 wr->wr.wr.fast_reg.page_shift = PAGE_SHIFT;
1920 wr->wr.wr.fast_reg.length = nob;
1921 wr->wr.wr.fast_reg.rkey =
1922 is_rx ? mr->rkey : mr->lkey;
1923 wr->wr.wr.fast_reg.access_flags =
1924 (IB_ACCESS_LOCAL_WRITE |
1925 IB_ACCESS_REMOTE_WRITE);
1928 fmr->fmr_key = is_rx ? mr->rkey : mr->lkey;
1930 fmr->fmr_pfmr = NULL;
1931 fmr->fmr_pool = fpo;
1934 spin_unlock(&fps->fps_lock);
1938 spin_lock(&fps->fps_lock);
1939 fpo->fpo_map_count--;
1940 if (rc != -EAGAIN) {
1941 spin_unlock(&fps->fps_lock);
1945 /* EAGAIN and ... */
1946 if (version != fps->fps_version) {
1947 spin_unlock(&fps->fps_lock);
1952 if (fps->fps_increasing) {
1953 spin_unlock(&fps->fps_lock);
1954 CDEBUG(D_NET, "Another thread is allocating new "
1955 "FMR pool, waiting for her to complete\n");
1961 if (ktime_get_seconds() < fps->fps_next_retry) {
1962 /* someone failed recently */
1963 spin_unlock(&fps->fps_lock);
1967 fps->fps_increasing = 1;
1968 spin_unlock(&fps->fps_lock);
1970 CDEBUG(D_NET, "Allocate new FMR pool\n");
1971 rc = kiblnd_create_fmr_pool(fps, &fpo);
1972 spin_lock(&fps->fps_lock);
1973 fps->fps_increasing = 0;
1976 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1978 fps->fps_next_retry = ktime_get_seconds() + IBLND_POOL_RETRY;
1980 spin_unlock(&fps->fps_lock);
1986 kiblnd_fini_pool(struct kib_pool *pool)
1988 LASSERT(list_empty(&pool->po_free_list));
1989 LASSERT(pool->po_allocated == 0);
1991 CDEBUG(D_NET, "Finalize %s pool\n", pool->po_owner->ps_name);
1995 kiblnd_init_pool(struct kib_poolset *ps, struct kib_pool *pool, int size)
1997 CDEBUG(D_NET, "Initialize %s pool\n", ps->ps_name);
1999 memset(pool, 0, sizeof(struct kib_pool));
2000 INIT_LIST_HEAD(&pool->po_free_list);
2001 pool->po_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
2002 pool->po_owner = ps;
2003 pool->po_size = size;
2007 kiblnd_destroy_pool_list(struct list_head *head)
2009 struct kib_pool *pool;
2011 while (!list_empty(head)) {
2012 pool = list_entry(head->next, struct kib_pool, po_list);
2013 list_del(&pool->po_list);
2015 LASSERT(pool->po_owner != NULL);
2016 pool->po_owner->ps_pool_destroy(pool);
2021 kiblnd_fail_poolset(struct kib_poolset *ps, struct list_head *zombies)
2023 if (ps->ps_net == NULL) /* intialized? */
2026 spin_lock(&ps->ps_lock);
2027 while (!list_empty(&ps->ps_pool_list)) {
2028 struct kib_pool *po = list_entry(ps->ps_pool_list.next,
2029 struct kib_pool, po_list);
2032 if (po->po_allocated == 0)
2033 list_move(&po->po_list, zombies);
2035 list_move(&po->po_list, &ps->ps_failed_pool_list);
2037 spin_unlock(&ps->ps_lock);
2041 kiblnd_fini_poolset(struct kib_poolset *ps)
2043 if (ps->ps_net != NULL) { /* initialized? */
2044 kiblnd_destroy_pool_list(&ps->ps_failed_pool_list);
2045 kiblnd_destroy_pool_list(&ps->ps_pool_list);
2050 kiblnd_init_poolset(struct kib_poolset *ps, int cpt,
2051 struct kib_net *net, char *name, int size,
2052 kib_ps_pool_create_t po_create,
2053 kib_ps_pool_destroy_t po_destroy,
2054 kib_ps_node_init_t nd_init,
2055 kib_ps_node_fini_t nd_fini)
2057 struct kib_pool *pool;
2060 memset(ps, 0, sizeof(struct kib_poolset));
2064 ps->ps_pool_create = po_create;
2065 ps->ps_pool_destroy = po_destroy;
2066 ps->ps_node_init = nd_init;
2067 ps->ps_node_fini = nd_fini;
2068 ps->ps_pool_size = size;
2069 if (strlcpy(ps->ps_name, name, sizeof(ps->ps_name))
2070 >= sizeof(ps->ps_name))
2072 spin_lock_init(&ps->ps_lock);
2073 INIT_LIST_HEAD(&ps->ps_pool_list);
2074 INIT_LIST_HEAD(&ps->ps_failed_pool_list);
2076 rc = ps->ps_pool_create(ps, size, &pool);
2078 list_add(&pool->po_list, &ps->ps_pool_list);
2080 CERROR("Failed to create the first pool for %s\n", ps->ps_name);
2086 kiblnd_pool_is_idle(struct kib_pool *pool, time64_t now)
2088 if (pool->po_allocated != 0) /* still in use */
2090 if (pool->po_failed)
2092 return now >= pool->po_deadline;
2096 kiblnd_pool_free_node(struct kib_pool *pool, struct list_head *node)
2099 struct kib_poolset *ps = pool->po_owner;
2100 struct kib_pool *tmp;
2101 time64_t now = ktime_get_seconds();
2103 spin_lock(&ps->ps_lock);
2105 if (ps->ps_node_fini != NULL)
2106 ps->ps_node_fini(pool, node);
2108 LASSERT(pool->po_allocated > 0);
2109 list_add(node, &pool->po_free_list);
2110 pool->po_allocated--;
2112 list_for_each_entry_safe(pool, tmp, &ps->ps_pool_list, po_list) {
2113 /* the first pool is persistent */
2114 if (ps->ps_pool_list.next == &pool->po_list)
2117 if (kiblnd_pool_is_idle(pool, now))
2118 list_move(&pool->po_list, &zombies);
2120 spin_unlock(&ps->ps_lock);
2122 if (!list_empty(&zombies))
2123 kiblnd_destroy_pool_list(&zombies);
2127 kiblnd_pool_alloc_node(struct kib_poolset *ps)
2129 struct list_head *node;
2130 struct kib_pool *pool;
2132 unsigned int interval = 1;
2133 ktime_t time_before;
2134 unsigned int trips = 0;
2137 spin_lock(&ps->ps_lock);
2138 list_for_each_entry(pool, &ps->ps_pool_list, po_list) {
2139 if (list_empty(&pool->po_free_list))
2142 pool->po_allocated++;
2143 pool->po_deadline = ktime_get_seconds() +
2144 IBLND_POOL_DEADLINE;
2145 node = pool->po_free_list.next;
2148 if (ps->ps_node_init != NULL) {
2149 /* still hold the lock */
2150 ps->ps_node_init(pool, node);
2152 spin_unlock(&ps->ps_lock);
2156 /* no available tx pool and ... */
2157 if (ps->ps_increasing) {
2158 /* another thread is allocating a new pool */
2159 spin_unlock(&ps->ps_lock);
2162 "Another thread is allocating new %s pool, waiting %d jiffies for her to complete. trips = %d\n",
2163 ps->ps_name, interval, trips);
2165 schedule_timeout_interruptible(interval);
2166 if (interval < cfs_time_seconds(1))
2172 if (ktime_get_seconds() < ps->ps_next_retry) {
2173 /* someone failed recently */
2174 spin_unlock(&ps->ps_lock);
2178 ps->ps_increasing = 1;
2179 spin_unlock(&ps->ps_lock);
2181 CDEBUG(D_NET, "%s pool exhausted, allocate new pool\n", ps->ps_name);
2182 time_before = ktime_get();
2183 rc = ps->ps_pool_create(ps, ps->ps_pool_size, &pool);
2184 CDEBUG(D_NET, "ps_pool_create took %lld ms to complete",
2185 ktime_ms_delta(ktime_get(), time_before));
2187 spin_lock(&ps->ps_lock);
2188 ps->ps_increasing = 0;
2190 list_add_tail(&pool->po_list, &ps->ps_pool_list);
2192 ps->ps_next_retry = ktime_get_seconds() + IBLND_POOL_RETRY;
2193 CERROR("Can't allocate new %s pool because out of memory\n",
2196 spin_unlock(&ps->ps_lock);
2202 kiblnd_destroy_tx_pool(struct kib_pool *pool)
2204 struct kib_tx_pool *tpo = container_of(pool, struct kib_tx_pool,
2208 LASSERT (pool->po_allocated == 0);
2210 if (tpo->tpo_tx_pages != NULL) {
2211 kiblnd_unmap_tx_pool(tpo);
2212 kiblnd_free_pages(tpo->tpo_tx_pages);
2215 if (tpo->tpo_tx_descs == NULL)
2218 for (i = 0; i < pool->po_size; i++) {
2219 struct kib_tx *tx = &tpo->tpo_tx_descs[i];
2220 int wrq_sge = *kiblnd_tunables.kib_wrq_sge;
2222 list_del(&tx->tx_list);
2223 if (tx->tx_pages != NULL)
2224 CFS_FREE_PTR_ARRAY(tx->tx_pages, LNET_MAX_IOV);
2225 if (tx->tx_frags != NULL)
2226 CFS_FREE_PTR_ARRAY(tx->tx_frags,
2227 (1 + IBLND_MAX_RDMA_FRAGS));
2228 if (tx->tx_wrq != NULL)
2229 CFS_FREE_PTR_ARRAY(tx->tx_wrq,
2230 (1 + IBLND_MAX_RDMA_FRAGS));
2231 if (tx->tx_sge != NULL)
2232 CFS_FREE_PTR_ARRAY(tx->tx_sge,
2233 (1 + IBLND_MAX_RDMA_FRAGS) *
2235 if (tx->tx_rd != NULL)
2236 LIBCFS_FREE(tx->tx_rd,
2237 offsetof(struct kib_rdma_desc,
2238 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2241 CFS_FREE_PTR_ARRAY(tpo->tpo_tx_descs, pool->po_size);
2243 kiblnd_fini_pool(pool);
2247 static int kiblnd_tx_pool_size(struct lnet_ni *ni, int ncpts)
2249 struct lnet_ioctl_config_o2iblnd_tunables *tunables;
2252 tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib;
2253 ntx = tunables->lnd_ntx / ncpts;
2255 return max(IBLND_TX_POOL, ntx);
2259 kiblnd_create_tx_pool(struct kib_poolset *ps, int size, struct kib_pool **pp_po)
2263 struct kib_pool *pool;
2264 struct kib_tx_pool *tpo;
2266 LIBCFS_CPT_ALLOC(tpo, lnet_cpt_table(), ps->ps_cpt, sizeof(*tpo));
2268 CERROR("Failed to allocate TX pool\n");
2272 pool = &tpo->tpo_pool;
2273 kiblnd_init_pool(ps, pool, size);
2274 tpo->tpo_tx_descs = NULL;
2275 tpo->tpo_tx_pages = NULL;
2277 npg = (size * IBLND_MSG_SIZE + PAGE_SIZE - 1) / PAGE_SIZE;
2278 if (kiblnd_alloc_pages(&tpo->tpo_tx_pages, ps->ps_cpt, npg) != 0) {
2279 CERROR("Can't allocate tx pages: %d\n", npg);
2284 LIBCFS_CPT_ALLOC(tpo->tpo_tx_descs, lnet_cpt_table(), ps->ps_cpt,
2285 size * sizeof(struct kib_tx));
2286 if (tpo->tpo_tx_descs == NULL) {
2287 CERROR("Can't allocate %d tx descriptors\n", size);
2288 ps->ps_pool_destroy(pool);
2292 memset(tpo->tpo_tx_descs, 0, size * sizeof(struct kib_tx));
2294 for (i = 0; i < size; i++) {
2295 struct kib_tx *tx = &tpo->tpo_tx_descs[i];
2296 int wrq_sge = *kiblnd_tunables.kib_wrq_sge;
2299 if (ps->ps_net->ibn_fmr_ps != NULL) {
2300 LIBCFS_CPT_ALLOC(tx->tx_pages,
2301 lnet_cpt_table(), ps->ps_cpt,
2302 LNET_MAX_IOV * sizeof(*tx->tx_pages));
2303 if (tx->tx_pages == NULL)
2307 LIBCFS_CPT_ALLOC(tx->tx_frags, lnet_cpt_table(), ps->ps_cpt,
2308 (1 + IBLND_MAX_RDMA_FRAGS) *
2309 sizeof(*tx->tx_frags));
2310 if (tx->tx_frags == NULL)
2313 sg_init_table(tx->tx_frags, IBLND_MAX_RDMA_FRAGS + 1);
2315 LIBCFS_CPT_ALLOC(tx->tx_wrq, lnet_cpt_table(), ps->ps_cpt,
2316 (1 + IBLND_MAX_RDMA_FRAGS) *
2317 sizeof(*tx->tx_wrq));
2318 if (tx->tx_wrq == NULL)
2321 LIBCFS_CPT_ALLOC(tx->tx_sge, lnet_cpt_table(), ps->ps_cpt,
2322 (1 + IBLND_MAX_RDMA_FRAGS) * wrq_sge *
2323 sizeof(*tx->tx_sge));
2324 if (tx->tx_sge == NULL)
2327 LIBCFS_CPT_ALLOC(tx->tx_rd, lnet_cpt_table(), ps->ps_cpt,
2328 offsetof(struct kib_rdma_desc,
2329 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2330 if (tx->tx_rd == NULL)
2335 kiblnd_map_tx_pool(tpo);
2340 ps->ps_pool_destroy(pool);
2345 kiblnd_tx_init(struct kib_pool *pool, struct list_head *node)
2347 struct kib_tx_poolset *tps = container_of(pool->po_owner,
2348 struct kib_tx_poolset,
2350 struct kib_tx *tx = list_entry(node, struct kib_tx, tx_list);
2352 tx->tx_cookie = tps->tps_next_tx_cookie++;
2356 kiblnd_net_fini_pools(struct kib_net *net)
2360 cfs_cpt_for_each(i, lnet_cpt_table()) {
2361 struct kib_tx_poolset *tps;
2362 struct kib_fmr_poolset *fps;
2364 if (net->ibn_tx_ps != NULL) {
2365 tps = net->ibn_tx_ps[i];
2366 kiblnd_fini_poolset(&tps->tps_poolset);
2369 if (net->ibn_fmr_ps != NULL) {
2370 fps = net->ibn_fmr_ps[i];
2371 kiblnd_fini_fmr_poolset(fps);
2375 if (net->ibn_tx_ps != NULL) {
2376 cfs_percpt_free(net->ibn_tx_ps);
2377 net->ibn_tx_ps = NULL;
2380 if (net->ibn_fmr_ps != NULL) {
2381 cfs_percpt_free(net->ibn_fmr_ps);
2382 net->ibn_fmr_ps = NULL;
2387 kiblnd_net_init_pools(struct kib_net *net, struct lnet_ni *ni, __u32 *cpts,
2390 struct lnet_ioctl_config_o2iblnd_tunables *tunables;
2391 #ifdef HAVE_IB_GET_DMA_MR
2392 unsigned long flags;
2398 tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib;
2400 #ifdef HAVE_IB_GET_DMA_MR
2401 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2403 * if lnd_map_on_demand is zero then we have effectively disabled
2404 * FMR or FastReg and we're using global memory regions
2407 if (!tunables->lnd_map_on_demand) {
2408 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
2410 goto create_tx_pool;
2413 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2416 if (tunables->lnd_fmr_pool_size < tunables->lnd_ntx / 4) {
2417 CERROR("Can't set fmr pool size (%d) < ntx / 4(%d)\n",
2418 tunables->lnd_fmr_pool_size,
2419 tunables->lnd_ntx / 4);
2424 /* TX pool must be created later than FMR, see LU-2268
2426 LASSERT(net->ibn_tx_ps == NULL);
2428 /* premapping can fail if ibd_nmr > 1, so we always create
2429 * FMR pool and map-on-demand if premapping failed */
2431 net->ibn_fmr_ps = cfs_percpt_alloc(lnet_cpt_table(),
2432 sizeof(struct kib_fmr_poolset));
2433 if (net->ibn_fmr_ps == NULL) {
2434 CERROR("Failed to allocate FMR pool array\n");
2439 for (i = 0; i < ncpts; i++) {
2440 cpt = (cpts == NULL) ? i : cpts[i];
2441 rc = kiblnd_init_fmr_poolset(net->ibn_fmr_ps[cpt], cpt, ncpts,
2444 CERROR("Can't initialize FMR pool for CPT %d: %d\n",
2451 LASSERT(i == ncpts);
2453 #ifdef HAVE_IB_GET_DMA_MR
2456 net->ibn_tx_ps = cfs_percpt_alloc(lnet_cpt_table(),
2457 sizeof(struct kib_tx_poolset));
2458 if (net->ibn_tx_ps == NULL) {
2459 CERROR("Failed to allocate tx pool array\n");
2464 for (i = 0; i < ncpts; i++) {
2465 cpt = (cpts == NULL) ? i : cpts[i];
2466 rc = kiblnd_init_poolset(&net->ibn_tx_ps[cpt]->tps_poolset,
2468 kiblnd_tx_pool_size(ni, ncpts),
2469 kiblnd_create_tx_pool,
2470 kiblnd_destroy_tx_pool,
2471 kiblnd_tx_init, NULL);
2473 CERROR("Can't initialize TX pool for CPT %d: %d\n",
2481 kiblnd_net_fini_pools(net);
2487 kiblnd_port_get_attr(struct kib_hca_dev *hdev)
2489 struct ib_port_attr *port_attr;
2491 unsigned long flags;
2492 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2494 LIBCFS_ALLOC(port_attr, sizeof(*port_attr));
2495 if (port_attr == NULL) {
2496 CDEBUG(D_NETERROR, "Out of memory\n");
2500 rc = ib_query_port(hdev->ibh_ibdev, hdev->ibh_port, port_attr);
2502 write_lock_irqsave(g_lock, flags);
2505 hdev->ibh_state = port_attr->state == IB_PORT_ACTIVE
2506 ? IBLND_DEV_PORT_ACTIVE
2507 : IBLND_DEV_PORT_DOWN;
2509 write_unlock_irqrestore(g_lock, flags);
2510 LIBCFS_FREE(port_attr, sizeof(*port_attr));
2513 CDEBUG(D_NETERROR, "Failed to query IB port: %d\n", rc);
2520 kiblnd_set_ni_fatal_on(struct kib_hca_dev *hdev, int val)
2522 struct kib_net *net;
2524 /* for health check */
2525 list_for_each_entry(net, &hdev->ibh_dev->ibd_nets, ibn_list) {
2527 CDEBUG(D_NETERROR, "Fatal device error for NI %s\n",
2528 libcfs_nid2str(net->ibn_ni->ni_nid));
2529 atomic_set(&net->ibn_ni->ni_fatal_error_on, val);
2534 kiblnd_event_handler(struct ib_event_handler *handler, struct ib_event *event)
2536 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2537 struct kib_hca_dev *hdev;
2538 unsigned long flags;
2540 hdev = container_of(handler, struct kib_hca_dev, ibh_event_handler);
2542 write_lock_irqsave(g_lock, flags);
2544 switch (event->event) {
2545 case IB_EVENT_DEVICE_FATAL:
2546 CDEBUG(D_NET, "IB device fatal\n");
2547 hdev->ibh_state = IBLND_DEV_FATAL;
2548 kiblnd_set_ni_fatal_on(hdev, 1);
2550 case IB_EVENT_PORT_ACTIVE:
2551 CDEBUG(D_NET, "IB port active\n");
2552 if (event->element.port_num == hdev->ibh_port) {
2553 hdev->ibh_state = IBLND_DEV_PORT_ACTIVE;
2554 kiblnd_set_ni_fatal_on(hdev, 0);
2557 case IB_EVENT_PORT_ERR:
2558 CDEBUG(D_NET, "IB port err\n");
2559 if (event->element.port_num == hdev->ibh_port) {
2560 hdev->ibh_state = IBLND_DEV_PORT_DOWN;
2561 kiblnd_set_ni_fatal_on(hdev, 1);
2567 write_unlock_irqrestore(g_lock, flags);
2571 kiblnd_hdev_get_attr(struct kib_hca_dev *hdev)
2573 struct ib_device_attr *dev_attr;
2577 /* It's safe to assume a HCA can handle a page size
2578 * matching that of the native system */
2579 hdev->ibh_page_shift = PAGE_SHIFT;
2580 hdev->ibh_page_size = 1 << PAGE_SHIFT;
2581 hdev->ibh_page_mask = ~((__u64)hdev->ibh_page_size - 1);
2583 #ifndef HAVE_IB_DEVICE_ATTRS
2584 LIBCFS_ALLOC(dev_attr, sizeof(*dev_attr));
2585 if (dev_attr == NULL) {
2586 CERROR("Out of memory\n");
2590 rc = ib_query_device(hdev->ibh_ibdev, dev_attr);
2592 CERROR("Failed to query IB device: %d\n", rc);
2593 goto out_clean_attr;
2596 dev_attr = &hdev->ibh_ibdev->attrs;
2599 hdev->ibh_mr_size = dev_attr->max_mr_size;
2600 hdev->ibh_max_qp_wr = dev_attr->max_qp_wr;
2602 /* Setup device Memory Registration capabilities */
2603 #ifdef HAVE_IB_DEVICE_OPS
2604 if (hdev->ibh_ibdev->ops.alloc_fmr &&
2605 hdev->ibh_ibdev->ops.dealloc_fmr &&
2606 hdev->ibh_ibdev->ops.map_phys_fmr &&
2607 hdev->ibh_ibdev->ops.unmap_fmr) {
2609 if (hdev->ibh_ibdev->alloc_fmr &&
2610 hdev->ibh_ibdev->dealloc_fmr &&
2611 hdev->ibh_ibdev->map_phys_fmr &&
2612 hdev->ibh_ibdev->unmap_fmr) {
2614 LCONSOLE_INFO("Using FMR for registration\n");
2615 hdev->ibh_dev->ibd_dev_caps |= IBLND_DEV_CAPS_FMR_ENABLED;
2616 } else if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) {
2617 LCONSOLE_INFO("Using FastReg for registration\n");
2618 hdev->ibh_dev->ibd_dev_caps |= IBLND_DEV_CAPS_FASTREG_ENABLED;
2619 #ifndef HAVE_IB_ALLOC_FAST_REG_MR
2620 #ifdef IB_DEVICE_SG_GAPS_REG
2621 if (dev_attr->device_cap_flags & IB_DEVICE_SG_GAPS_REG)
2622 hdev->ibh_dev->ibd_dev_caps |= IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT;
2629 rc2 = kiblnd_port_get_attr(hdev);
2636 #ifndef HAVE_IB_DEVICE_ATTRS
2638 LIBCFS_FREE(dev_attr, sizeof(*dev_attr));
2642 CERROR("IB device does not support FMRs nor FastRegs, can't "
2643 "register memory: %d\n", rc);
2644 else if (rc == -EINVAL)
2645 CERROR("Invalid mr size: %#llx\n", hdev->ibh_mr_size);
2649 #ifdef HAVE_IB_GET_DMA_MR
2651 kiblnd_hdev_cleanup_mrs(struct kib_hca_dev *hdev)
2653 if (hdev->ibh_mrs == NULL)
2656 ib_dereg_mr(hdev->ibh_mrs);
2658 hdev->ibh_mrs = NULL;
2663 kiblnd_hdev_destroy(struct kib_hca_dev *hdev)
2665 if (hdev->ibh_event_handler.device != NULL)
2666 ib_unregister_event_handler(&hdev->ibh_event_handler);
2668 #ifdef HAVE_IB_GET_DMA_MR
2669 kiblnd_hdev_cleanup_mrs(hdev);
2672 if (hdev->ibh_pd != NULL)
2673 ib_dealloc_pd(hdev->ibh_pd);
2675 if (hdev->ibh_cmid != NULL)
2676 rdma_destroy_id(hdev->ibh_cmid);
2678 LIBCFS_FREE(hdev, sizeof(*hdev));
2681 #ifdef HAVE_IB_GET_DMA_MR
2683 kiblnd_hdev_setup_mrs(struct kib_hca_dev *hdev)
2686 int acflags = IB_ACCESS_LOCAL_WRITE |
2687 IB_ACCESS_REMOTE_WRITE;
2689 mr = ib_get_dma_mr(hdev->ibh_pd, acflags);
2691 CERROR("Failed ib_get_dma_mr: %ld\n", PTR_ERR(mr));
2692 kiblnd_hdev_cleanup_mrs(hdev);
2703 kiblnd_dummy_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event)
2709 kiblnd_dev_need_failover(struct kib_dev *dev, struct net *ns)
2711 struct rdma_cm_id *cmid;
2712 struct sockaddr_in srcaddr;
2713 struct sockaddr_in dstaddr;
2716 if (dev->ibd_hdev == NULL || /* initializing */
2717 dev->ibd_hdev->ibh_cmid == NULL || /* listener is dead */
2718 *kiblnd_tunables.kib_dev_failover > 1) /* debugging */
2721 /* XXX: it's UGLY, but I don't have better way to find
2722 * ib-bonding HCA failover because:
2724 * a. no reliable CM event for HCA failover...
2725 * b. no OFED API to get ib_device for current net_device...
2727 * We have only two choices at this point:
2729 * a. rdma_bind_addr(), it will conflict with listener cmid
2730 * b. rdma_resolve_addr() to zero addr */
2731 cmid = kiblnd_rdma_create_id(ns, kiblnd_dummy_callback, dev,
2732 RDMA_PS_TCP, IB_QPT_RC);
2735 CERROR("Failed to create cmid for failover: %d\n", rc);
2739 memset(&srcaddr, 0, sizeof(srcaddr));
2740 srcaddr.sin_family = AF_INET;
2741 srcaddr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2743 memset(&dstaddr, 0, sizeof(dstaddr));
2744 dstaddr.sin_family = AF_INET;
2745 rc = rdma_resolve_addr(cmid, (struct sockaddr *)&srcaddr,
2746 (struct sockaddr *)&dstaddr, 1);
2747 if (rc != 0 || cmid->device == NULL) {
2748 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2749 dev->ibd_ifname, &dev->ibd_ifip,
2751 rdma_destroy_id(cmid);
2755 rc = dev->ibd_hdev->ibh_ibdev != cmid->device; /* true for failover */
2756 rdma_destroy_id(cmid);
2761 kiblnd_dev_failover(struct kib_dev *dev, struct net *ns)
2763 LIST_HEAD(zombie_tpo);
2764 LIST_HEAD(zombie_ppo);
2765 LIST_HEAD(zombie_fpo);
2766 struct rdma_cm_id *cmid = NULL;
2767 struct kib_hca_dev *hdev = NULL;
2768 struct kib_hca_dev *old;
2770 struct kib_net *net;
2771 struct sockaddr_in addr;
2772 unsigned long flags;
2776 LASSERT (*kiblnd_tunables.kib_dev_failover > 1 ||
2777 dev->ibd_can_failover ||
2778 dev->ibd_hdev == NULL);
2780 rc = kiblnd_dev_need_failover(dev, ns);
2784 if (dev->ibd_hdev != NULL &&
2785 dev->ibd_hdev->ibh_cmid != NULL) {
2786 /* XXX it's not good to close old listener at here,
2787 * because we can fail to create new listener.
2788 * But we have to close it now, otherwise rdma_bind_addr
2789 * will return EADDRINUSE... How crap! */
2790 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2792 cmid = dev->ibd_hdev->ibh_cmid;
2793 /* make next schedule of kiblnd_dev_need_failover()
2794 * return 1 for me */
2795 dev->ibd_hdev->ibh_cmid = NULL;
2796 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2798 rdma_destroy_id(cmid);
2801 cmid = kiblnd_rdma_create_id(ns, kiblnd_cm_callback, dev, RDMA_PS_TCP,
2805 CERROR("Failed to create cmid for failover: %d\n", rc);
2809 memset(&addr, 0, sizeof(addr));
2810 addr.sin_family = AF_INET;
2811 addr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2812 addr.sin_port = htons(*kiblnd_tunables.kib_service);
2814 /* Bind to failover device or port */
2815 rc = rdma_bind_addr(cmid, (struct sockaddr *)&addr);
2816 if (rc != 0 || cmid->device == NULL) {
2817 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2818 dev->ibd_ifname, &dev->ibd_ifip,
2820 rdma_destroy_id(cmid);
2824 LIBCFS_ALLOC(hdev, sizeof(*hdev));
2826 CERROR("Failed to allocate kib_hca_dev\n");
2827 rdma_destroy_id(cmid);
2832 atomic_set(&hdev->ibh_ref, 1);
2833 hdev->ibh_dev = dev;
2834 hdev->ibh_cmid = cmid;
2835 hdev->ibh_ibdev = cmid->device;
2836 hdev->ibh_port = cmid->port_num;
2838 #ifdef HAVE_IB_ALLOC_PD_2ARGS
2839 pd = ib_alloc_pd(cmid->device, 0);
2841 pd = ib_alloc_pd(cmid->device);
2845 CERROR("Can't allocate PD: %d\n", rc);
2851 rc = rdma_listen(cmid, 0);
2853 CERROR("Can't start new listener: %d\n", rc);
2857 rc = kiblnd_hdev_get_attr(hdev);
2859 CERROR("Can't get device attributes: %d\n", rc);
2863 #ifdef HAVE_IB_GET_DMA_MR
2864 rc = kiblnd_hdev_setup_mrs(hdev);
2866 CERROR("Can't setup device: %d\n", rc);
2871 INIT_IB_EVENT_HANDLER(&hdev->ibh_event_handler,
2872 hdev->ibh_ibdev, kiblnd_event_handler);
2873 ib_register_event_handler(&hdev->ibh_event_handler);
2875 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2877 old = dev->ibd_hdev;
2878 dev->ibd_hdev = hdev; /* take over the refcount */
2881 list_for_each_entry(net, &dev->ibd_nets, ibn_list) {
2882 cfs_cpt_for_each(i, lnet_cpt_table()) {
2883 kiblnd_fail_poolset(&net->ibn_tx_ps[i]->tps_poolset,
2886 if (net->ibn_fmr_ps != NULL)
2887 kiblnd_fail_fmr_poolset(net->ibn_fmr_ps[i],
2892 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2894 if (!list_empty(&zombie_tpo))
2895 kiblnd_destroy_pool_list(&zombie_tpo);
2896 if (!list_empty(&zombie_ppo))
2897 kiblnd_destroy_pool_list(&zombie_ppo);
2898 if (!list_empty(&zombie_fpo))
2899 kiblnd_destroy_fmr_pool_list(&zombie_fpo);
2901 kiblnd_hdev_decref(hdev);
2904 dev->ibd_failed_failover++;
2906 dev->ibd_failed_failover = 0;
2912 kiblnd_destroy_dev(struct kib_dev *dev)
2914 LASSERT(dev->ibd_nnets == 0);
2915 LASSERT(list_empty(&dev->ibd_nets));
2917 list_del(&dev->ibd_fail_list);
2918 list_del(&dev->ibd_list);
2920 if (dev->ibd_hdev != NULL)
2921 kiblnd_hdev_decref(dev->ibd_hdev);
2923 LIBCFS_FREE(dev, sizeof(*dev));
2927 kiblnd_base_shutdown(void)
2929 struct kib_sched_info *sched;
2932 LASSERT(list_empty(&kiblnd_data.kib_devs));
2934 CDEBUG(D_MALLOC, "before LND base cleanup: kmem %d\n",
2935 atomic_read(&libcfs_kmemory));
2937 switch (kiblnd_data.kib_init) {
2941 case IBLND_INIT_ALL:
2942 case IBLND_INIT_DATA:
2943 LASSERT (kiblnd_data.kib_peers != NULL);
2944 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
2945 LASSERT(list_empty(&kiblnd_data.kib_peers[i]));
2947 LASSERT(list_empty(&kiblnd_data.kib_connd_zombies));
2948 LASSERT(list_empty(&kiblnd_data.kib_connd_conns));
2949 LASSERT(list_empty(&kiblnd_data.kib_reconn_list));
2950 LASSERT(list_empty(&kiblnd_data.kib_reconn_wait));
2952 /* flag threads to terminate; wake and wait for them to die */
2953 kiblnd_data.kib_shutdown = 1;
2955 /* NB: we really want to stop scheduler threads net by net
2956 * instead of the whole module, this should be improved
2957 * with dynamic configuration LNet */
2958 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds)
2959 wake_up_all(&sched->ibs_waitq);
2961 wake_up_all(&kiblnd_data.kib_connd_waitq);
2962 wake_up_all(&kiblnd_data.kib_failover_waitq);
2964 wait_var_event_warning(&kiblnd_data.kib_nthreads,
2965 !atomic_read(&kiblnd_data.kib_nthreads),
2966 "Waiting for %d threads to terminate\n",
2967 atomic_read(&kiblnd_data.kib_nthreads));
2970 case IBLND_INIT_NOTHING:
2974 if (kiblnd_data.kib_peers)
2975 CFS_FREE_PTR_ARRAY(kiblnd_data.kib_peers,
2976 kiblnd_data.kib_peer_hash_size);
2978 if (kiblnd_data.kib_scheds != NULL)
2979 cfs_percpt_free(kiblnd_data.kib_scheds);
2981 CDEBUG(D_MALLOC, "after LND base cleanup: kmem %d\n",
2982 atomic_read(&libcfs_kmemory));
2984 kiblnd_data.kib_init = IBLND_INIT_NOTHING;
2985 module_put(THIS_MODULE);
2989 kiblnd_shutdown(struct lnet_ni *ni)
2991 struct kib_net *net = ni->ni_data;
2992 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2993 unsigned long flags;
2995 LASSERT(kiblnd_data.kib_init == IBLND_INIT_ALL);
3000 CDEBUG(D_MALLOC, "before LND net cleanup: kmem %d\n",
3001 atomic_read(&libcfs_kmemory));
3003 write_lock_irqsave(g_lock, flags);
3004 net->ibn_shutdown = 1;
3005 write_unlock_irqrestore(g_lock, flags);
3007 switch (net->ibn_init) {
3011 case IBLND_INIT_ALL:
3012 /* nuke all existing peers within this net */
3013 kiblnd_del_peer(ni, LNET_NID_ANY);
3015 /* Wait for all peer_ni state to clean up */
3016 wait_var_event_warning(&net->ibn_npeers,
3017 atomic_read(&net->ibn_npeers) == 0,
3018 "%s: waiting for %d peers to disconnect\n",
3019 libcfs_nid2str(ni->ni_nid),
3020 atomic_read(&net->ibn_npeers));
3022 kiblnd_net_fini_pools(net);
3024 write_lock_irqsave(g_lock, flags);
3025 LASSERT(net->ibn_dev->ibd_nnets > 0);
3026 net->ibn_dev->ibd_nnets--;
3027 list_del(&net->ibn_list);
3028 write_unlock_irqrestore(g_lock, flags);
3032 case IBLND_INIT_NOTHING:
3033 LASSERT (atomic_read(&net->ibn_nconns) == 0);
3035 if (net->ibn_dev != NULL &&
3036 net->ibn_dev->ibd_nnets == 0)
3037 kiblnd_destroy_dev(net->ibn_dev);
3042 CDEBUG(D_MALLOC, "after LND net cleanup: kmem %d\n",
3043 atomic_read(&libcfs_kmemory));
3045 net->ibn_init = IBLND_INIT_NOTHING;
3048 LIBCFS_FREE(net, sizeof(*net));
3051 if (list_empty(&kiblnd_data.kib_devs))
3052 kiblnd_base_shutdown();
3056 kiblnd_base_startup(struct net *ns)
3058 struct kib_sched_info *sched;
3062 LASSERT(kiblnd_data.kib_init == IBLND_INIT_NOTHING);
3064 if (!try_module_get(THIS_MODULE))
3067 memset(&kiblnd_data, 0, sizeof(kiblnd_data)); /* zero pointers, flags etc */
3069 rwlock_init(&kiblnd_data.kib_global_lock);
3071 INIT_LIST_HEAD(&kiblnd_data.kib_devs);
3072 INIT_LIST_HEAD(&kiblnd_data.kib_failed_devs);
3074 kiblnd_data.kib_peer_hash_size = IBLND_PEER_HASH_SIZE;
3075 CFS_ALLOC_PTR_ARRAY(kiblnd_data.kib_peers,
3076 kiblnd_data.kib_peer_hash_size);
3077 if (kiblnd_data.kib_peers == NULL)
3080 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++)
3081 INIT_LIST_HEAD(&kiblnd_data.kib_peers[i]);
3083 spin_lock_init(&kiblnd_data.kib_connd_lock);
3084 INIT_LIST_HEAD(&kiblnd_data.kib_connd_conns);
3085 INIT_LIST_HEAD(&kiblnd_data.kib_connd_zombies);
3086 INIT_LIST_HEAD(&kiblnd_data.kib_reconn_list);
3087 INIT_LIST_HEAD(&kiblnd_data.kib_reconn_wait);
3089 init_waitqueue_head(&kiblnd_data.kib_connd_waitq);
3090 init_waitqueue_head(&kiblnd_data.kib_failover_waitq);
3092 kiblnd_data.kib_scheds = cfs_percpt_alloc(lnet_cpt_table(),
3094 if (kiblnd_data.kib_scheds == NULL)
3097 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
3100 spin_lock_init(&sched->ibs_lock);
3101 INIT_LIST_HEAD(&sched->ibs_conns);
3102 init_waitqueue_head(&sched->ibs_waitq);
3104 nthrs = cfs_cpt_weight(lnet_cpt_table(), i);
3105 if (*kiblnd_tunables.kib_nscheds > 0) {
3106 nthrs = min(nthrs, *kiblnd_tunables.kib_nscheds);
3108 /* max to half of CPUs, another half is reserved for
3109 * upper layer modules */
3110 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
3113 sched->ibs_nthreads_max = nthrs;
3117 kiblnd_data.kib_error_qpa.qp_state = IB_QPS_ERR;
3119 /* lists/ptrs/locks initialised */
3120 kiblnd_data.kib_init = IBLND_INIT_DATA;
3121 /*****************************************************/
3123 rc = kiblnd_thread_start(kiblnd_connd, NULL, "kiblnd_connd");
3125 CERROR("Can't spawn o2iblnd connd: %d\n", rc);
3129 if (*kiblnd_tunables.kib_dev_failover != 0)
3130 rc = kiblnd_thread_start(kiblnd_failover_thread, ns,
3134 CERROR("Can't spawn o2iblnd failover thread: %d\n", rc);
3138 /* flag everything initialised */
3139 kiblnd_data.kib_init = IBLND_INIT_ALL;
3140 /*****************************************************/
3145 kiblnd_base_shutdown();
3150 kiblnd_start_schedulers(struct kib_sched_info *sched)
3156 if (sched->ibs_nthreads == 0) {
3157 if (*kiblnd_tunables.kib_nscheds > 0) {
3158 nthrs = sched->ibs_nthreads_max;
3160 nthrs = cfs_cpt_weight(lnet_cpt_table(),
3162 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
3163 nthrs = min(IBLND_N_SCHED_HIGH, nthrs);
3166 LASSERT(sched->ibs_nthreads <= sched->ibs_nthreads_max);
3167 /* increase one thread if there is new interface */
3168 nthrs = (sched->ibs_nthreads < sched->ibs_nthreads_max);
3171 for (i = 0; i < nthrs; i++) {
3174 id = KIB_THREAD_ID(sched->ibs_cpt, sched->ibs_nthreads + i);
3175 snprintf(name, sizeof(name), "kiblnd_sd_%02ld_%02ld",
3176 KIB_THREAD_CPT(id), KIB_THREAD_TID(id));
3177 rc = kiblnd_thread_start(kiblnd_scheduler, (void *)id, name);
3181 CERROR("Can't spawn thread %d for scheduler[%d]: %d\n",
3182 sched->ibs_cpt, sched->ibs_nthreads + i, rc);
3186 sched->ibs_nthreads += i;
3190 static int kiblnd_dev_start_threads(struct kib_dev *dev, bool newdev, u32 *cpts,
3197 for (i = 0; i < ncpts; i++) {
3198 struct kib_sched_info *sched;
3200 cpt = (cpts == NULL) ? i : cpts[i];
3201 sched = kiblnd_data.kib_scheds[cpt];
3203 if (!newdev && sched->ibs_nthreads > 0)
3206 rc = kiblnd_start_schedulers(kiblnd_data.kib_scheds[cpt]);
3208 CERROR("Failed to start scheduler threads for %s\n",
3216 static struct kib_dev *
3217 kiblnd_dev_search(char *ifname)
3219 struct kib_dev *alias = NULL;
3220 struct kib_dev *dev;
3224 colon = strchr(ifname, ':');
3225 list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) {
3226 if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
3232 colon2 = strchr(dev->ibd_ifname, ':');
3238 if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
3250 kiblnd_startup(struct lnet_ni *ni)
3252 char *ifname = NULL;
3253 struct lnet_inetdev *ifaces = NULL;
3254 struct kib_dev *ibdev = NULL;
3255 struct kib_net *net = NULL;
3256 unsigned long flags;
3261 LASSERT(ni->ni_net->net_lnd == &the_o2iblnd);
3263 if (kiblnd_data.kib_init == IBLND_INIT_NOTHING) {
3264 rc = kiblnd_base_startup(ni->ni_net_ns);
3269 LIBCFS_ALLOC(net, sizeof(*net));
3277 net->ibn_incarnation = ktime_get_real_ns() / NSEC_PER_USEC;
3279 kiblnd_tunables_setup(ni);
3282 * ni_interfaces is only to support legacy pre Multi-Rail
3283 * tcp bonding for ksocklnd. Multi-Rail wants each secondary
3284 * IP to be treated as an unique 'struct ni' interfaces instead.
3286 if (ni->ni_interfaces[0] != NULL) {
3287 /* Use the IPoIB interface specified in 'networks=' */
3288 if (ni->ni_interfaces[1] != NULL) {
3289 CERROR("ko2iblnd: Multiple interfaces not supported\n");
3294 ifname = ni->ni_interfaces[0];
3296 ifname = *kiblnd_tunables.kib_default_ipif;
3299 if (strlen(ifname) >= sizeof(ibdev->ibd_ifname)) {
3300 CERROR("IPoIB interface name too long: %s\n", ifname);
3305 rc = lnet_inet_enumerate(&ifaces, ni->ni_net_ns);
3309 for (i = 0; i < rc; i++) {
3310 if (strcmp(ifname, ifaces[i].li_name) == 0)
3315 CERROR("ko2iblnd: No matching interfaces\n");
3320 ibdev = kiblnd_dev_search(ifname);
3321 newdev = ibdev == NULL;
3322 /* hmm...create kib_dev even for alias */
3323 if (ibdev == NULL || strcmp(&ibdev->ibd_ifname[0], ifname) != 0) {
3324 LIBCFS_ALLOC(ibdev, sizeof(*ibdev));
3330 ibdev->ibd_ifip = ifaces[i].li_ipaddr;
3331 strlcpy(ibdev->ibd_ifname, ifaces[i].li_name,
3332 sizeof(ibdev->ibd_ifname));
3333 ibdev->ibd_can_failover = !!(ifaces[i].li_flags & IFF_MASTER);
3335 INIT_LIST_HEAD(&ibdev->ibd_nets);
3336 INIT_LIST_HEAD(&ibdev->ibd_list); /* not yet in kib_devs */
3337 INIT_LIST_HEAD(&ibdev->ibd_fail_list);
3339 /* initialize the device */
3340 rc = kiblnd_dev_failover(ibdev, ni->ni_net_ns);
3342 CERROR("ko2iblnd: Can't initialize device: rc = %d\n",
3347 list_add_tail(&ibdev->ibd_list, &kiblnd_data.kib_devs);
3350 net->ibn_dev = ibdev;
3351 ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid), ibdev->ibd_ifip);
3353 ni->ni_dev_cpt = ifaces[i].li_cpt;
3355 rc = kiblnd_dev_start_threads(ibdev, newdev, ni->ni_cpts, ni->ni_ncpts);
3359 rc = kiblnd_net_init_pools(net, ni, ni->ni_cpts, ni->ni_ncpts);
3361 CERROR("Failed to initialize NI pools: %d\n", rc);
3365 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
3367 list_add_tail(&net->ibn_list, &ibdev->ibd_nets);
3368 /* for health check */
3369 if (ibdev->ibd_hdev->ibh_state == IBLND_DEV_PORT_DOWN)
3370 kiblnd_set_ni_fatal_on(ibdev->ibd_hdev, 1);
3371 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
3373 net->ibn_init = IBLND_INIT_ALL;
3378 if (net != NULL && net->ibn_dev == NULL && ibdev != NULL)
3379 kiblnd_destroy_dev(ibdev);
3382 kiblnd_shutdown(ni);
3384 CDEBUG(D_NET, "Configuration of device %s failed: rc = %d\n",
3385 ifname ? ifname : "", rc);
3390 static const struct lnet_lnd the_o2iblnd = {
3391 .lnd_type = O2IBLND,
3392 .lnd_startup = kiblnd_startup,
3393 .lnd_shutdown = kiblnd_shutdown,
3394 .lnd_ctl = kiblnd_ctl,
3395 .lnd_send = kiblnd_send,
3396 .lnd_recv = kiblnd_recv,
3399 static void __exit ko2iblnd_exit(void)
3401 lnet_unregister_lnd(&the_o2iblnd);
3404 static int __init ko2iblnd_init(void)
3408 BUILD_BUG_ON(sizeof(struct kib_msg) > IBLND_MSG_SIZE);
3409 BUILD_BUG_ON(offsetof(struct kib_msg,
3410 ibm_u.get.ibgm_rd.rd_frags[IBLND_MAX_RDMA_FRAGS]) >
3412 BUILD_BUG_ON(offsetof(struct kib_msg,
3413 ibm_u.putack.ibpam_rd.rd_frags[IBLND_MAX_RDMA_FRAGS]) >
3416 rc = kiblnd_tunables_init();
3420 lnet_register_lnd(&the_o2iblnd);
3425 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3426 MODULE_DESCRIPTION("OpenIB gen2 LNet Network Driver");
3427 MODULE_VERSION("2.8.0");
3428 MODULE_LICENSE("GPL");
3430 module_init(ko2iblnd_init);
3431 module_exit(ko2iblnd_exit);