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,
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10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2015, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lnet/klnds/o2iblnd/o2iblnd.c
38 * Author: Eric Barton <eric@bartonsoftware.com>
41 #include <asm/div64.h>
45 static lnd_t the_o2iblnd;
47 kib_data_t kiblnd_data;
49 static __u32 kiblnd_cksum(void *ptr, int nob)
55 sum = ((sum << 1) | (sum >> 31)) + *c++;
57 /* ensure I don't return 0 (== no checksum) */
58 return !sum ? 1 : sum;
61 static char *kiblnd_msgtype2str(int type)
64 case IBLND_MSG_CONNREQ:
67 case IBLND_MSG_CONNACK:
73 case IBLND_MSG_IMMEDIATE:
76 case IBLND_MSG_PUT_REQ:
79 case IBLND_MSG_PUT_NAK:
82 case IBLND_MSG_PUT_ACK:
85 case IBLND_MSG_PUT_DONE:
88 case IBLND_MSG_GET_REQ:
91 case IBLND_MSG_GET_DONE:
99 static int kiblnd_msgtype2size(int type)
101 const int hdr_size = offsetof(kib_msg_t, ibm_u);
104 case IBLND_MSG_CONNREQ:
105 case IBLND_MSG_CONNACK:
106 return hdr_size + sizeof(kib_connparams_t);
111 case IBLND_MSG_IMMEDIATE:
112 return offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[0]);
114 case IBLND_MSG_PUT_REQ:
115 return hdr_size + sizeof(kib_putreq_msg_t);
117 case IBLND_MSG_PUT_ACK:
118 return hdr_size + sizeof(kib_putack_msg_t);
120 case IBLND_MSG_GET_REQ:
121 return hdr_size + sizeof(kib_get_msg_t);
123 case IBLND_MSG_PUT_NAK:
124 case IBLND_MSG_PUT_DONE:
125 case IBLND_MSG_GET_DONE:
126 return hdr_size + sizeof(kib_completion_msg_t);
132 static int kiblnd_unpack_rd(kib_msg_t *msg, int flip)
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(kib_msg_t, 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(lnet_ni_t *ni, kib_msg_t *msg, int version,
180 int credits, lnet_nid_t dstnid, __u64 dststamp)
182 kib_net_t *net = ni->ni_data;
185 * CAVEAT EMPTOR! all message fields not set here should have been
186 * initialised previously.
188 msg->ibm_magic = IBLND_MSG_MAGIC;
189 msg->ibm_version = version;
191 msg->ibm_credits = credits;
194 msg->ibm_srcnid = ni->ni_nid;
195 msg->ibm_srcstamp = net->ibn_incarnation;
196 msg->ibm_dstnid = dstnid;
197 msg->ibm_dststamp = dststamp;
199 if (*kiblnd_tunables.kib_cksum) {
200 /* NB ibm_cksum zero while computing cksum */
201 msg->ibm_cksum = kiblnd_cksum(msg, msg->ibm_nob);
205 int kiblnd_unpack_msg(kib_msg_t *msg, int nob)
207 const int hdr_size = offsetof(kib_msg_t, ibm_u);
213 /* 6 bytes are enough to have received magic + version */
215 CERROR("Short message: %d\n", nob);
219 if (msg->ibm_magic == IBLND_MSG_MAGIC) {
221 } else if (msg->ibm_magic == __swab32(IBLND_MSG_MAGIC)) {
224 CERROR("Bad magic: %08x\n", msg->ibm_magic);
228 version = flip ? __swab16(msg->ibm_version) : msg->ibm_version;
229 if (version != IBLND_MSG_VERSION &&
230 version != IBLND_MSG_VERSION_1) {
231 CERROR("Bad version: %x\n", version);
235 if (nob < hdr_size) {
236 CERROR("Short message: %d\n", nob);
240 msg_nob = flip ? __swab32(msg->ibm_nob) : msg->ibm_nob;
242 CERROR("Short message: got %d, wanted %d\n", nob, msg_nob);
247 * checksum must be computed with ibm_cksum zero and BEFORE anything
250 msg_cksum = flip ? __swab32(msg->ibm_cksum) : msg->ibm_cksum;
253 msg_cksum != kiblnd_cksum(msg, msg_nob)) {
254 CERROR("Bad checksum\n");
258 msg->ibm_cksum = msg_cksum;
261 /* leave magic unflipped as a clue to peer endianness */
262 msg->ibm_version = version;
263 CLASSERT(sizeof(msg->ibm_type) == 1);
264 CLASSERT(sizeof(msg->ibm_credits) == 1);
265 msg->ibm_nob = msg_nob;
266 __swab64s(&msg->ibm_srcnid);
267 __swab64s(&msg->ibm_srcstamp);
268 __swab64s(&msg->ibm_dstnid);
269 __swab64s(&msg->ibm_dststamp);
272 if (msg->ibm_srcnid == LNET_NID_ANY) {
273 CERROR("Bad src nid: %s\n", libcfs_nid2str(msg->ibm_srcnid));
277 if (msg_nob < kiblnd_msgtype2size(msg->ibm_type)) {
278 CERROR("Short %s: %d(%d)\n", kiblnd_msgtype2str(msg->ibm_type),
279 msg_nob, kiblnd_msgtype2size(msg->ibm_type));
283 switch (msg->ibm_type) {
285 CERROR("Unknown message type %x\n", msg->ibm_type);
289 case IBLND_MSG_IMMEDIATE:
290 case IBLND_MSG_PUT_REQ:
293 case IBLND_MSG_PUT_ACK:
294 case IBLND_MSG_GET_REQ:
295 if (kiblnd_unpack_rd(msg, flip))
299 case IBLND_MSG_PUT_NAK:
300 case IBLND_MSG_PUT_DONE:
301 case IBLND_MSG_GET_DONE:
303 __swab32s(&msg->ibm_u.completion.ibcm_status);
306 case IBLND_MSG_CONNREQ:
307 case IBLND_MSG_CONNACK:
309 __swab16s(&msg->ibm_u.connparams.ibcp_queue_depth);
310 __swab16s(&msg->ibm_u.connparams.ibcp_max_frags);
311 __swab32s(&msg->ibm_u.connparams.ibcp_max_msg_size);
318 int kiblnd_create_peer(lnet_ni_t *ni, kib_peer_t **peerp, lnet_nid_t nid)
321 kib_net_t *net = ni->ni_data;
322 int cpt = lnet_cpt_of_nid(nid);
326 LASSERT(nid != LNET_NID_ANY);
328 LIBCFS_CPT_ALLOC(peer, lnet_cpt_table(), cpt, sizeof(*peer));
330 CERROR("Cannot allocate peer\n");
337 peer->ibp_last_alive = 0;
338 peer->ibp_max_frags = IBLND_CFG_RDMA_FRAGS;
339 peer->ibp_queue_depth = *kiblnd_tunables.kib_peertxcredits;
340 atomic_set(&peer->ibp_refcount, 1); /* 1 ref for caller */
342 INIT_LIST_HEAD(&peer->ibp_list); /* not in the peer table yet */
343 INIT_LIST_HEAD(&peer->ibp_conns);
344 INIT_LIST_HEAD(&peer->ibp_tx_queue);
346 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
348 /* always called with a ref on ni, which prevents ni being shutdown */
349 LASSERT(!net->ibn_shutdown);
351 /* npeers only grows with the global lock held */
352 atomic_inc(&net->ibn_npeers);
354 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
360 void kiblnd_destroy_peer(kib_peer_t *peer)
362 kib_net_t *net = peer->ibp_ni->ni_data;
365 LASSERT(!atomic_read(&peer->ibp_refcount));
366 LASSERT(!kiblnd_peer_active(peer));
367 LASSERT(kiblnd_peer_idle(peer));
368 LASSERT(list_empty(&peer->ibp_tx_queue));
370 LIBCFS_FREE(peer, sizeof(*peer));
373 * NB a peer's connections keep a reference on their peer until
374 * they are destroyed, so we can be assured that _all_ state to do
375 * with this peer has been cleaned up when its refcount drops to
378 atomic_dec(&net->ibn_npeers);
381 kib_peer_t *kiblnd_find_peer_locked(lnet_nid_t nid)
384 * the caller is responsible for accounting the additional reference
387 struct list_head *peer_list = kiblnd_nid2peerlist(nid);
388 struct list_head *tmp;
391 list_for_each(tmp, peer_list) {
392 peer = list_entry(tmp, kib_peer_t, ibp_list);
393 LASSERT(!kiblnd_peer_idle(peer));
395 if (peer->ibp_nid != nid)
398 CDEBUG(D_NET, "got peer [%p] -> %s (%d) version: %x\n",
399 peer, libcfs_nid2str(nid),
400 atomic_read(&peer->ibp_refcount),
407 void kiblnd_unlink_peer_locked(kib_peer_t *peer)
409 LASSERT(list_empty(&peer->ibp_conns));
411 LASSERT(kiblnd_peer_active(peer));
412 list_del_init(&peer->ibp_list);
413 /* lose peerlist's ref */
414 kiblnd_peer_decref(peer);
417 static int kiblnd_get_peer_info(lnet_ni_t *ni, int index,
418 lnet_nid_t *nidp, int *count)
421 struct list_head *ptmp;
425 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
427 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
428 list_for_each(ptmp, &kiblnd_data.kib_peers[i]) {
429 peer = list_entry(ptmp, kib_peer_t, ibp_list);
430 LASSERT(!kiblnd_peer_idle(peer));
432 if (peer->ibp_ni != ni)
438 *nidp = peer->ibp_nid;
439 *count = atomic_read(&peer->ibp_refcount);
441 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
447 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
451 static void kiblnd_del_peer_locked(kib_peer_t *peer)
453 struct list_head *ctmp;
454 struct list_head *cnxt;
457 if (list_empty(&peer->ibp_conns)) {
458 kiblnd_unlink_peer_locked(peer);
460 list_for_each_safe(ctmp, cnxt, &peer->ibp_conns) {
461 conn = list_entry(ctmp, kib_conn_t, ibc_list);
463 kiblnd_close_conn_locked(conn, 0);
465 /* NB closing peer's last conn unlinked it. */
468 * NB peer now unlinked; might even be freed if the peer table had the
473 static int kiblnd_del_peer(lnet_ni_t *ni, lnet_nid_t nid)
476 struct list_head *ptmp;
477 struct list_head *pnxt;
485 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
487 if (nid != LNET_NID_ANY) {
488 lo = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
489 hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
492 hi = kiblnd_data.kib_peer_hash_size - 1;
495 for (i = lo; i <= hi; i++) {
496 list_for_each_safe(ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
497 peer = list_entry(ptmp, kib_peer_t, ibp_list);
498 LASSERT(!kiblnd_peer_idle(peer));
500 if (peer->ibp_ni != ni)
503 if (!(nid == LNET_NID_ANY || peer->ibp_nid == nid))
506 if (!list_empty(&peer->ibp_tx_queue)) {
507 LASSERT(list_empty(&peer->ibp_conns));
509 list_splice_init(&peer->ibp_tx_queue,
513 kiblnd_del_peer_locked(peer);
514 rc = 0; /* matched something */
518 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
520 kiblnd_txlist_done(ni, &zombies, -EIO);
525 static kib_conn_t *kiblnd_get_conn_by_idx(lnet_ni_t *ni, int index)
528 struct list_head *ptmp;
530 struct list_head *ctmp;
534 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
536 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
537 list_for_each(ptmp, &kiblnd_data.kib_peers[i]) {
538 peer = list_entry(ptmp, kib_peer_t, ibp_list);
539 LASSERT(!kiblnd_peer_idle(peer));
541 if (peer->ibp_ni != ni)
544 list_for_each(ctmp, &peer->ibp_conns) {
548 conn = list_entry(ctmp, kib_conn_t,
550 kiblnd_conn_addref(conn);
551 read_unlock_irqrestore(
552 &kiblnd_data.kib_global_lock,
559 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
563 int kiblnd_translate_mtu(int value)
583 static void kiblnd_setup_mtu_locked(struct rdma_cm_id *cmid)
587 /* XXX There is no path record for iWARP, set by netdev->change_mtu? */
588 if (!cmid->route.path_rec)
591 mtu = kiblnd_translate_mtu(*kiblnd_tunables.kib_ib_mtu);
594 cmid->route.path_rec->mtu = mtu;
597 static int kiblnd_get_completion_vector(kib_conn_t *conn, int cpt)
603 lnet_nid_t nid = conn->ibc_peer->ibp_nid;
605 vectors = conn->ibc_cmid->device->num_comp_vectors;
609 mask = cfs_cpt_cpumask(lnet_cpt_table(), cpt);
613 /* hash NID to CPU id in this partition... */
614 off = do_div(nid, cpumask_weight(mask));
615 for_each_cpu(i, mask) {
624 kib_conn_t *kiblnd_create_conn(kib_peer_t *peer, struct rdma_cm_id *cmid,
625 int state, int version)
629 * If the new conn is created successfully it takes over the caller's
630 * ref on 'peer'. It also "owns" 'cmid' and destroys it when it itself
631 * is destroyed. On failure, the caller's ref on 'peer' remains and
632 * she must dispose of 'cmid'. (Actually I'd block forever if I tried
633 * to destroy 'cmid' here since I'm called from the CM which still has
634 * its ref on 'cmid').
636 rwlock_t *glock = &kiblnd_data.kib_global_lock;
637 kib_net_t *net = peer->ibp_ni->ni_data;
639 struct ib_qp_init_attr *init_qp_attr;
640 struct kib_sched_info *sched;
641 struct ib_cq_init_attr cq_attr = {};
650 LASSERT(!in_interrupt());
654 cpt = lnet_cpt_of_nid(peer->ibp_nid);
655 sched = kiblnd_data.kib_scheds[cpt];
657 LASSERT(sched->ibs_nthreads > 0);
659 LIBCFS_CPT_ALLOC(init_qp_attr, lnet_cpt_table(), cpt,
660 sizeof(*init_qp_attr));
662 CERROR("Can't allocate qp_attr for %s\n",
663 libcfs_nid2str(peer->ibp_nid));
667 LIBCFS_CPT_ALLOC(conn, lnet_cpt_table(), cpt, sizeof(*conn));
669 CERROR("Can't allocate connection for %s\n",
670 libcfs_nid2str(peer->ibp_nid));
674 conn->ibc_state = IBLND_CONN_INIT;
675 conn->ibc_version = version;
676 conn->ibc_peer = peer; /* I take the caller's ref */
677 cmid->context = conn; /* for future CM callbacks */
678 conn->ibc_cmid = cmid;
679 conn->ibc_max_frags = peer->ibp_max_frags;
680 conn->ibc_queue_depth = peer->ibp_queue_depth;
682 INIT_LIST_HEAD(&conn->ibc_early_rxs);
683 INIT_LIST_HEAD(&conn->ibc_tx_noops);
684 INIT_LIST_HEAD(&conn->ibc_tx_queue);
685 INIT_LIST_HEAD(&conn->ibc_tx_queue_rsrvd);
686 INIT_LIST_HEAD(&conn->ibc_tx_queue_nocred);
687 INIT_LIST_HEAD(&conn->ibc_active_txs);
688 spin_lock_init(&conn->ibc_lock);
690 LIBCFS_CPT_ALLOC(conn->ibc_connvars, lnet_cpt_table(), cpt,
691 sizeof(*conn->ibc_connvars));
692 if (!conn->ibc_connvars) {
693 CERROR("Can't allocate in-progress connection state\n");
697 write_lock_irqsave(glock, flags);
698 if (dev->ibd_failover) {
699 write_unlock_irqrestore(glock, flags);
700 CERROR("%s: failover in progress\n", dev->ibd_ifname);
704 if (dev->ibd_hdev->ibh_ibdev != cmid->device) {
705 /* wakeup failover thread and teardown connection */
706 if (kiblnd_dev_can_failover(dev)) {
707 list_add_tail(&dev->ibd_fail_list,
708 &kiblnd_data.kib_failed_devs);
709 wake_up(&kiblnd_data.kib_failover_waitq);
712 write_unlock_irqrestore(glock, flags);
713 CERROR("cmid HCA(%s), kib_dev(%s) need failover\n",
714 cmid->device->name, dev->ibd_ifname);
718 kiblnd_hdev_addref_locked(dev->ibd_hdev);
719 conn->ibc_hdev = dev->ibd_hdev;
721 kiblnd_setup_mtu_locked(cmid);
723 write_unlock_irqrestore(glock, flags);
725 LIBCFS_CPT_ALLOC(conn->ibc_rxs, lnet_cpt_table(), cpt,
726 IBLND_RX_MSGS(conn) * sizeof(kib_rx_t));
727 if (!conn->ibc_rxs) {
728 CERROR("Cannot allocate RX buffers\n");
732 rc = kiblnd_alloc_pages(&conn->ibc_rx_pages, cpt,
733 IBLND_RX_MSG_PAGES(conn));
737 kiblnd_map_rx_descs(conn);
739 cq_attr.cqe = IBLND_CQ_ENTRIES(conn);
740 cq_attr.comp_vector = kiblnd_get_completion_vector(conn, cpt);
741 cq = ib_create_cq(cmid->device,
742 kiblnd_cq_completion, kiblnd_cq_event, conn,
745 CERROR("Failed to create CQ with %d CQEs: %ld\n",
746 IBLND_CQ_ENTRIES(conn), PTR_ERR(cq));
752 rc = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
754 CERROR("Can't request completion notification: %d\n", rc);
758 init_qp_attr->event_handler = kiblnd_qp_event;
759 init_qp_attr->qp_context = conn;
760 init_qp_attr->cap.max_send_wr = IBLND_SEND_WRS(conn);
761 init_qp_attr->cap.max_recv_wr = IBLND_RECV_WRS(conn);
762 init_qp_attr->cap.max_send_sge = 1;
763 init_qp_attr->cap.max_recv_sge = 1;
764 init_qp_attr->sq_sig_type = IB_SIGNAL_REQ_WR;
765 init_qp_attr->qp_type = IB_QPT_RC;
766 init_qp_attr->send_cq = cq;
767 init_qp_attr->recv_cq = cq;
769 conn->ibc_sched = sched;
771 rc = rdma_create_qp(cmid, conn->ibc_hdev->ibh_pd, init_qp_attr);
773 CERROR("Can't create QP: %d, send_wr: %d, recv_wr: %d\n",
774 rc, init_qp_attr->cap.max_send_wr,
775 init_qp_attr->cap.max_recv_wr);
779 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
781 /* 1 ref for caller and each rxmsg */
782 atomic_set(&conn->ibc_refcount, 1 + IBLND_RX_MSGS(conn));
783 conn->ibc_nrx = IBLND_RX_MSGS(conn);
786 for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
787 rc = kiblnd_post_rx(&conn->ibc_rxs[i],
788 IBLND_POSTRX_NO_CREDIT);
790 CERROR("Can't post rxmsg: %d\n", rc);
792 /* Make posted receives complete */
793 kiblnd_abort_receives(conn);
796 * correct # of posted buffers
797 * NB locking needed now I'm racing with completion
799 spin_lock_irqsave(&sched->ibs_lock, flags);
800 conn->ibc_nrx -= IBLND_RX_MSGS(conn) - i;
801 spin_unlock_irqrestore(&sched->ibs_lock, flags);
804 * cmid will be destroyed by CM(ofed) after cm_callback
805 * returned, so we can't refer it anymore
806 * (by kiblnd_connd()->kiblnd_destroy_conn)
808 rdma_destroy_qp(conn->ibc_cmid);
809 conn->ibc_cmid = NULL;
811 /* Drop my own and unused rxbuffer refcounts */
812 while (i++ <= IBLND_RX_MSGS(conn))
813 kiblnd_conn_decref(conn);
819 /* Init successful! */
820 LASSERT(state == IBLND_CONN_ACTIVE_CONNECT ||
821 state == IBLND_CONN_PASSIVE_WAIT);
822 conn->ibc_state = state;
825 atomic_inc(&net->ibn_nconns);
829 kiblnd_destroy_conn(conn, true);
831 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
836 void kiblnd_destroy_conn(kib_conn_t *conn, bool free_conn)
838 struct rdma_cm_id *cmid = conn->ibc_cmid;
839 kib_peer_t *peer = conn->ibc_peer;
842 LASSERT(!in_interrupt());
843 LASSERT(!atomic_read(&conn->ibc_refcount));
844 LASSERT(list_empty(&conn->ibc_early_rxs));
845 LASSERT(list_empty(&conn->ibc_tx_noops));
846 LASSERT(list_empty(&conn->ibc_tx_queue));
847 LASSERT(list_empty(&conn->ibc_tx_queue_rsrvd));
848 LASSERT(list_empty(&conn->ibc_tx_queue_nocred));
849 LASSERT(list_empty(&conn->ibc_active_txs));
850 LASSERT(!conn->ibc_noops_posted);
851 LASSERT(!conn->ibc_nsends_posted);
853 switch (conn->ibc_state) {
855 /* conn must be completely disengaged from the network */
858 case IBLND_CONN_DISCONNECTED:
859 /* connvars should have been freed already */
860 LASSERT(!conn->ibc_connvars);
863 case IBLND_CONN_INIT:
867 /* conn->ibc_cmid might be destroyed by CM already */
868 if (cmid && cmid->qp)
869 rdma_destroy_qp(cmid);
872 rc = ib_destroy_cq(conn->ibc_cq);
874 CWARN("Error destroying CQ: %d\n", rc);
877 if (conn->ibc_rx_pages)
878 kiblnd_unmap_rx_descs(conn);
881 LIBCFS_FREE(conn->ibc_rxs,
882 IBLND_RX_MSGS(conn) * sizeof(kib_rx_t));
885 if (conn->ibc_connvars)
886 LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
889 kiblnd_hdev_decref(conn->ibc_hdev);
891 /* See CAVEAT EMPTOR above in kiblnd_create_conn */
892 if (conn->ibc_state != IBLND_CONN_INIT) {
893 kib_net_t *net = peer->ibp_ni->ni_data;
895 kiblnd_peer_decref(peer);
896 rdma_destroy_id(cmid);
897 atomic_dec(&net->ibn_nconns);
900 LIBCFS_FREE(conn, sizeof(*conn));
903 int kiblnd_close_peer_conns_locked(kib_peer_t *peer, int why)
906 struct list_head *ctmp;
907 struct list_head *cnxt;
910 list_for_each_safe(ctmp, cnxt, &peer->ibp_conns) {
911 conn = list_entry(ctmp, kib_conn_t, ibc_list);
913 CDEBUG(D_NET, "Closing conn -> %s, version: %x, reason: %d\n",
914 libcfs_nid2str(peer->ibp_nid),
915 conn->ibc_version, why);
917 kiblnd_close_conn_locked(conn, why);
924 int kiblnd_close_stale_conns_locked(kib_peer_t *peer,
925 int version, __u64 incarnation)
928 struct list_head *ctmp;
929 struct list_head *cnxt;
932 list_for_each_safe(ctmp, cnxt, &peer->ibp_conns) {
933 conn = list_entry(ctmp, kib_conn_t, ibc_list);
935 if (conn->ibc_version == version &&
936 conn->ibc_incarnation == incarnation)
940 "Closing stale conn -> %s version: %x, incarnation:%#llx(%x, %#llx)\n",
941 libcfs_nid2str(peer->ibp_nid),
942 conn->ibc_version, conn->ibc_incarnation,
943 version, incarnation);
945 kiblnd_close_conn_locked(conn, -ESTALE);
952 static int kiblnd_close_matching_conns(lnet_ni_t *ni, lnet_nid_t nid)
955 struct list_head *ptmp;
956 struct list_head *pnxt;
963 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
965 if (nid != LNET_NID_ANY) {
966 lo = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
967 hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
970 hi = kiblnd_data.kib_peer_hash_size - 1;
973 for (i = lo; i <= hi; i++) {
974 list_for_each_safe(ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
975 peer = list_entry(ptmp, kib_peer_t, ibp_list);
976 LASSERT(!kiblnd_peer_idle(peer));
978 if (peer->ibp_ni != ni)
981 if (!(nid == LNET_NID_ANY || nid == peer->ibp_nid))
984 count += kiblnd_close_peer_conns_locked(peer, 0);
988 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
990 /* wildcards always succeed */
991 if (nid == LNET_NID_ANY)
994 return !count ? -ENOENT : 0;
997 static int kiblnd_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg)
999 struct libcfs_ioctl_data *data = arg;
1003 case IOC_LIBCFS_GET_PEER: {
1007 rc = kiblnd_get_peer_info(ni, data->ioc_count,
1009 data->ioc_nid = nid;
1010 data->ioc_count = count;
1014 case IOC_LIBCFS_DEL_PEER: {
1015 rc = kiblnd_del_peer(ni, data->ioc_nid);
1018 case IOC_LIBCFS_GET_CONN: {
1022 conn = kiblnd_get_conn_by_idx(ni, data->ioc_count);
1028 LASSERT(conn->ibc_cmid);
1029 data->ioc_nid = conn->ibc_peer->ibp_nid;
1030 if (!conn->ibc_cmid->route.path_rec)
1031 data->ioc_u32[0] = 0; /* iWarp has no path MTU */
1034 ib_mtu_enum_to_int(conn->ibc_cmid->route.path_rec->mtu);
1035 kiblnd_conn_decref(conn);
1038 case IOC_LIBCFS_CLOSE_CONNECTION: {
1039 rc = kiblnd_close_matching_conns(ni, data->ioc_nid);
1050 static void kiblnd_query(lnet_ni_t *ni, lnet_nid_t nid, unsigned long *when)
1052 unsigned long last_alive = 0;
1053 unsigned long now = cfs_time_current();
1054 rwlock_t *glock = &kiblnd_data.kib_global_lock;
1056 unsigned long flags;
1058 read_lock_irqsave(glock, flags);
1060 peer = kiblnd_find_peer_locked(nid);
1062 last_alive = peer->ibp_last_alive;
1064 read_unlock_irqrestore(glock, flags);
1070 * peer is not persistent in hash, trigger peer creation
1071 * and connection establishment with a NULL tx
1074 kiblnd_launch_tx(ni, NULL, nid);
1076 CDEBUG(D_NET, "Peer %s %p, alive %ld secs ago\n",
1077 libcfs_nid2str(nid), peer,
1078 last_alive ? cfs_duration_sec(now - last_alive) : -1);
1081 static void kiblnd_free_pages(kib_pages_t *p)
1083 int npages = p->ibp_npages;
1086 for (i = 0; i < npages; i++) {
1087 if (p->ibp_pages[i])
1088 __free_page(p->ibp_pages[i]);
1091 LIBCFS_FREE(p, offsetof(kib_pages_t, ibp_pages[npages]));
1094 int kiblnd_alloc_pages(kib_pages_t **pp, int cpt, int npages)
1099 LIBCFS_CPT_ALLOC(p, lnet_cpt_table(), cpt,
1100 offsetof(kib_pages_t, ibp_pages[npages]));
1102 CERROR("Can't allocate descriptor for %d pages\n", npages);
1106 memset(p, 0, offsetof(kib_pages_t, ibp_pages[npages]));
1107 p->ibp_npages = npages;
1109 for (i = 0; i < npages; i++) {
1110 p->ibp_pages[i] = alloc_pages_node(
1111 cfs_cpt_spread_node(lnet_cpt_table(), cpt),
1113 if (!p->ibp_pages[i]) {
1114 CERROR("Can't allocate page %d of %d\n", i, npages);
1115 kiblnd_free_pages(p);
1124 void kiblnd_unmap_rx_descs(kib_conn_t *conn)
1129 LASSERT(conn->ibc_rxs);
1130 LASSERT(conn->ibc_hdev);
1132 for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
1133 rx = &conn->ibc_rxs[i];
1135 LASSERT(rx->rx_nob >= 0); /* not posted */
1137 kiblnd_dma_unmap_single(conn->ibc_hdev->ibh_ibdev,
1138 KIBLND_UNMAP_ADDR(rx, rx_msgunmap,
1140 IBLND_MSG_SIZE, DMA_FROM_DEVICE);
1143 kiblnd_free_pages(conn->ibc_rx_pages);
1145 conn->ibc_rx_pages = NULL;
1148 void kiblnd_map_rx_descs(kib_conn_t *conn)
1156 for (pg_off = ipg = i = 0; i < IBLND_RX_MSGS(conn); i++) {
1157 pg = conn->ibc_rx_pages->ibp_pages[ipg];
1158 rx = &conn->ibc_rxs[i];
1161 rx->rx_msg = (kib_msg_t *)(((char *)page_address(pg)) + pg_off);
1163 rx->rx_msgaddr = kiblnd_dma_map_single(conn->ibc_hdev->ibh_ibdev,
1167 LASSERT(!kiblnd_dma_mapping_error(conn->ibc_hdev->ibh_ibdev,
1169 KIBLND_UNMAP_ADDR_SET(rx, rx_msgunmap, rx->rx_msgaddr);
1171 CDEBUG(D_NET, "rx %d: %p %#llx(%#llx)\n",
1172 i, rx->rx_msg, rx->rx_msgaddr,
1173 (__u64)(page_to_phys(pg) + pg_off));
1175 pg_off += IBLND_MSG_SIZE;
1176 LASSERT(pg_off <= PAGE_SIZE);
1178 if (pg_off == PAGE_SIZE) {
1181 LASSERT(ipg <= IBLND_RX_MSG_PAGES(conn));
1186 static void kiblnd_unmap_tx_pool(kib_tx_pool_t *tpo)
1188 kib_hca_dev_t *hdev = tpo->tpo_hdev;
1192 LASSERT(!tpo->tpo_pool.po_allocated);
1197 for (i = 0; i < tpo->tpo_pool.po_size; i++) {
1198 tx = &tpo->tpo_tx_descs[i];
1199 kiblnd_dma_unmap_single(hdev->ibh_ibdev,
1200 KIBLND_UNMAP_ADDR(tx, tx_msgunmap,
1202 IBLND_MSG_SIZE, DMA_TO_DEVICE);
1205 kiblnd_hdev_decref(hdev);
1206 tpo->tpo_hdev = NULL;
1209 static kib_hca_dev_t *kiblnd_current_hdev(kib_dev_t *dev)
1211 kib_hca_dev_t *hdev;
1212 unsigned long flags;
1215 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1216 while (dev->ibd_failover) {
1217 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1219 CDEBUG(D_NET, "%s: Wait for failover\n",
1221 set_current_state(TASK_INTERRUPTIBLE);
1222 schedule_timeout(cfs_time_seconds(1) / 100);
1224 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1227 kiblnd_hdev_addref_locked(dev->ibd_hdev);
1228 hdev = dev->ibd_hdev;
1230 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1235 static void kiblnd_map_tx_pool(kib_tx_pool_t *tpo)
1237 kib_pages_t *txpgs = tpo->tpo_tx_pages;
1238 kib_pool_t *pool = &tpo->tpo_pool;
1239 kib_net_t *net = pool->po_owner->ps_net;
1251 /* pre-mapped messages are not bigger than 1 page */
1252 CLASSERT(IBLND_MSG_SIZE <= PAGE_SIZE);
1254 /* No fancy arithmetic when we do the buffer calculations */
1255 CLASSERT(!(PAGE_SIZE % IBLND_MSG_SIZE));
1257 tpo->tpo_hdev = kiblnd_current_hdev(dev);
1259 for (ipage = page_offset = i = 0; i < pool->po_size; i++) {
1260 page = txpgs->ibp_pages[ipage];
1261 tx = &tpo->tpo_tx_descs[i];
1263 tx->tx_msg = (kib_msg_t *)(((char *)page_address(page)) +
1266 tx->tx_msgaddr = kiblnd_dma_map_single(
1267 tpo->tpo_hdev->ibh_ibdev, tx->tx_msg,
1268 IBLND_MSG_SIZE, DMA_TO_DEVICE);
1269 LASSERT(!kiblnd_dma_mapping_error(tpo->tpo_hdev->ibh_ibdev,
1271 KIBLND_UNMAP_ADDR_SET(tx, tx_msgunmap, tx->tx_msgaddr);
1273 list_add(&tx->tx_list, &pool->po_free_list);
1275 page_offset += IBLND_MSG_SIZE;
1276 LASSERT(page_offset <= PAGE_SIZE);
1278 if (page_offset == PAGE_SIZE) {
1281 LASSERT(ipage <= txpgs->ibp_npages);
1286 struct ib_mr *kiblnd_find_rd_dma_mr(kib_hca_dev_t *hdev, kib_rdma_desc_t *rd,
1287 int negotiated_nfrags)
1289 __u16 nfrags = (negotiated_nfrags != -1) ?
1290 negotiated_nfrags : *kiblnd_tunables.kib_map_on_demand;
1292 LASSERT(hdev->ibh_mrs);
1294 if (*kiblnd_tunables.kib_map_on_demand > 0 &&
1295 nfrags <= rd->rd_nfrags)
1298 return hdev->ibh_mrs;
1301 static void kiblnd_destroy_fmr_pool(kib_fmr_pool_t *fpo)
1303 LASSERT(!fpo->fpo_map_count);
1305 if (fpo->fpo_fmr_pool)
1306 ib_destroy_fmr_pool(fpo->fpo_fmr_pool);
1309 kiblnd_hdev_decref(fpo->fpo_hdev);
1311 LIBCFS_FREE(fpo, sizeof(*fpo));
1314 static void kiblnd_destroy_fmr_pool_list(struct list_head *head)
1316 kib_fmr_pool_t *fpo, *tmp;
1318 list_for_each_entry_safe(fpo, tmp, head, fpo_list) {
1319 list_del(&fpo->fpo_list);
1320 kiblnd_destroy_fmr_pool(fpo);
1324 static int kiblnd_fmr_pool_size(int ncpts)
1326 int size = *kiblnd_tunables.kib_fmr_pool_size / ncpts;
1328 return max(IBLND_FMR_POOL, size);
1331 static int kiblnd_fmr_flush_trigger(int ncpts)
1333 int size = *kiblnd_tunables.kib_fmr_flush_trigger / ncpts;
1335 return max(IBLND_FMR_POOL_FLUSH, size);
1338 static int kiblnd_create_fmr_pool(kib_fmr_poolset_t *fps,
1339 kib_fmr_pool_t **pp_fpo)
1341 /* FMR pool for RDMA */
1342 kib_dev_t *dev = fps->fps_net->ibn_dev;
1343 kib_fmr_pool_t *fpo;
1344 struct ib_fmr_pool_param param = {
1345 .max_pages_per_fmr = LNET_MAX_PAYLOAD / PAGE_SIZE,
1346 .page_shift = PAGE_SHIFT,
1347 .access = (IB_ACCESS_LOCAL_WRITE |
1348 IB_ACCESS_REMOTE_WRITE),
1349 .pool_size = fps->fps_pool_size,
1350 .dirty_watermark = fps->fps_flush_trigger,
1351 .flush_function = NULL,
1353 .cache = !!*kiblnd_tunables.kib_fmr_cache};
1356 LIBCFS_CPT_ALLOC(fpo, lnet_cpt_table(), fps->fps_cpt, sizeof(*fpo));
1360 fpo->fpo_hdev = kiblnd_current_hdev(dev);
1362 fpo->fpo_fmr_pool = ib_create_fmr_pool(fpo->fpo_hdev->ibh_pd, ¶m);
1363 if (IS_ERR(fpo->fpo_fmr_pool)) {
1364 rc = PTR_ERR(fpo->fpo_fmr_pool);
1365 CERROR("Failed to create FMR pool: %d\n", rc);
1367 kiblnd_hdev_decref(fpo->fpo_hdev);
1368 LIBCFS_FREE(fpo, sizeof(*fpo));
1372 fpo->fpo_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1373 fpo->fpo_owner = fps;
1379 static void kiblnd_fail_fmr_poolset(kib_fmr_poolset_t *fps,
1380 struct list_head *zombies)
1382 if (!fps->fps_net) /* intialized? */
1385 spin_lock(&fps->fps_lock);
1387 while (!list_empty(&fps->fps_pool_list)) {
1388 kib_fmr_pool_t *fpo = list_entry(fps->fps_pool_list.next,
1389 kib_fmr_pool_t, fpo_list);
1390 fpo->fpo_failed = 1;
1391 list_del(&fpo->fpo_list);
1392 if (!fpo->fpo_map_count)
1393 list_add(&fpo->fpo_list, zombies);
1395 list_add(&fpo->fpo_list, &fps->fps_failed_pool_list);
1398 spin_unlock(&fps->fps_lock);
1401 static void kiblnd_fini_fmr_poolset(kib_fmr_poolset_t *fps)
1403 if (fps->fps_net) { /* initialized? */
1404 kiblnd_destroy_fmr_pool_list(&fps->fps_failed_pool_list);
1405 kiblnd_destroy_fmr_pool_list(&fps->fps_pool_list);
1409 static int kiblnd_init_fmr_poolset(kib_fmr_poolset_t *fps, int cpt,
1410 kib_net_t *net, int pool_size,
1413 kib_fmr_pool_t *fpo;
1416 memset(fps, 0, sizeof(*fps));
1420 fps->fps_pool_size = pool_size;
1421 fps->fps_flush_trigger = flush_trigger;
1422 spin_lock_init(&fps->fps_lock);
1423 INIT_LIST_HEAD(&fps->fps_pool_list);
1424 INIT_LIST_HEAD(&fps->fps_failed_pool_list);
1426 rc = kiblnd_create_fmr_pool(fps, &fpo);
1428 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1433 static int kiblnd_fmr_pool_is_idle(kib_fmr_pool_t *fpo, unsigned long now)
1435 if (fpo->fpo_map_count) /* still in use */
1437 if (fpo->fpo_failed)
1439 return cfs_time_aftereq(now, fpo->fpo_deadline);
1442 void kiblnd_fmr_pool_unmap(kib_fmr_t *fmr, int status)
1445 kib_fmr_pool_t *fpo = fmr->fmr_pool;
1446 kib_fmr_poolset_t *fps = fpo->fpo_owner;
1447 unsigned long now = cfs_time_current();
1448 kib_fmr_pool_t *tmp;
1451 rc = ib_fmr_pool_unmap(fmr->fmr_pfmr);
1455 rc = ib_flush_fmr_pool(fpo->fpo_fmr_pool);
1459 fmr->fmr_pool = NULL;
1460 fmr->fmr_pfmr = NULL;
1462 spin_lock(&fps->fps_lock);
1463 fpo->fpo_map_count--; /* decref the pool */
1465 list_for_each_entry_safe(fpo, tmp, &fps->fps_pool_list, fpo_list) {
1466 /* the first pool is persistent */
1467 if (fps->fps_pool_list.next == &fpo->fpo_list)
1470 if (kiblnd_fmr_pool_is_idle(fpo, now)) {
1471 list_move(&fpo->fpo_list, &zombies);
1475 spin_unlock(&fps->fps_lock);
1477 if (!list_empty(&zombies))
1478 kiblnd_destroy_fmr_pool_list(&zombies);
1481 int kiblnd_fmr_pool_map(kib_fmr_poolset_t *fps, __u64 *pages, int npages,
1482 __u64 iov, kib_fmr_t *fmr)
1484 struct ib_pool_fmr *pfmr;
1485 kib_fmr_pool_t *fpo;
1490 spin_lock(&fps->fps_lock);
1491 version = fps->fps_version;
1492 list_for_each_entry(fpo, &fps->fps_pool_list, fpo_list) {
1493 fpo->fpo_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1494 fpo->fpo_map_count++;
1495 spin_unlock(&fps->fps_lock);
1497 pfmr = ib_fmr_pool_map_phys(fpo->fpo_fmr_pool,
1498 pages, npages, iov);
1499 if (likely(!IS_ERR(pfmr))) {
1500 fmr->fmr_pool = fpo;
1501 fmr->fmr_pfmr = pfmr;
1505 spin_lock(&fps->fps_lock);
1506 fpo->fpo_map_count--;
1507 if (PTR_ERR(pfmr) != -EAGAIN) {
1508 spin_unlock(&fps->fps_lock);
1509 return PTR_ERR(pfmr);
1512 /* EAGAIN and ... */
1513 if (version != fps->fps_version) {
1514 spin_unlock(&fps->fps_lock);
1519 if (fps->fps_increasing) {
1520 spin_unlock(&fps->fps_lock);
1521 CDEBUG(D_NET, "Another thread is allocating new FMR pool, waiting for her to complete\n");
1526 if (time_before(cfs_time_current(), fps->fps_next_retry)) {
1527 /* someone failed recently */
1528 spin_unlock(&fps->fps_lock);
1532 fps->fps_increasing = 1;
1533 spin_unlock(&fps->fps_lock);
1535 CDEBUG(D_NET, "Allocate new FMR pool\n");
1536 rc = kiblnd_create_fmr_pool(fps, &fpo);
1537 spin_lock(&fps->fps_lock);
1538 fps->fps_increasing = 0;
1541 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1543 fps->fps_next_retry = cfs_time_shift(IBLND_POOL_RETRY);
1545 spin_unlock(&fps->fps_lock);
1550 static void kiblnd_fini_pool(kib_pool_t *pool)
1552 LASSERT(list_empty(&pool->po_free_list));
1553 LASSERT(!pool->po_allocated);
1555 CDEBUG(D_NET, "Finalize %s pool\n", pool->po_owner->ps_name);
1558 static void kiblnd_init_pool(kib_poolset_t *ps, kib_pool_t *pool, int size)
1560 CDEBUG(D_NET, "Initialize %s pool\n", ps->ps_name);
1562 memset(pool, 0, sizeof(*pool));
1563 INIT_LIST_HEAD(&pool->po_free_list);
1564 pool->po_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1565 pool->po_owner = ps;
1566 pool->po_size = size;
1569 static void kiblnd_destroy_pool_list(struct list_head *head)
1573 while (!list_empty(head)) {
1574 pool = list_entry(head->next, kib_pool_t, po_list);
1575 list_del(&pool->po_list);
1577 LASSERT(pool->po_owner);
1578 pool->po_owner->ps_pool_destroy(pool);
1582 static void kiblnd_fail_poolset(kib_poolset_t *ps, struct list_head *zombies)
1584 if (!ps->ps_net) /* intialized? */
1587 spin_lock(&ps->ps_lock);
1588 while (!list_empty(&ps->ps_pool_list)) {
1589 kib_pool_t *po = list_entry(ps->ps_pool_list.next,
1590 kib_pool_t, po_list);
1592 list_del(&po->po_list);
1593 if (!po->po_allocated)
1594 list_add(&po->po_list, zombies);
1596 list_add(&po->po_list, &ps->ps_failed_pool_list);
1598 spin_unlock(&ps->ps_lock);
1601 static void kiblnd_fini_poolset(kib_poolset_t *ps)
1603 if (ps->ps_net) { /* initialized? */
1604 kiblnd_destroy_pool_list(&ps->ps_failed_pool_list);
1605 kiblnd_destroy_pool_list(&ps->ps_pool_list);
1609 static int kiblnd_init_poolset(kib_poolset_t *ps, int cpt,
1610 kib_net_t *net, char *name, int size,
1611 kib_ps_pool_create_t po_create,
1612 kib_ps_pool_destroy_t po_destroy,
1613 kib_ps_node_init_t nd_init,
1614 kib_ps_node_fini_t nd_fini)
1619 memset(ps, 0, sizeof(*ps));
1623 ps->ps_pool_create = po_create;
1624 ps->ps_pool_destroy = po_destroy;
1625 ps->ps_node_init = nd_init;
1626 ps->ps_node_fini = nd_fini;
1627 ps->ps_pool_size = size;
1628 if (strlcpy(ps->ps_name, name, sizeof(ps->ps_name))
1629 >= sizeof(ps->ps_name))
1631 spin_lock_init(&ps->ps_lock);
1632 INIT_LIST_HEAD(&ps->ps_pool_list);
1633 INIT_LIST_HEAD(&ps->ps_failed_pool_list);
1635 rc = ps->ps_pool_create(ps, size, &pool);
1637 list_add(&pool->po_list, &ps->ps_pool_list);
1639 CERROR("Failed to create the first pool for %s\n", ps->ps_name);
1644 static int kiblnd_pool_is_idle(kib_pool_t *pool, unsigned long now)
1646 if (pool->po_allocated) /* still in use */
1648 if (pool->po_failed)
1650 return cfs_time_aftereq(now, pool->po_deadline);
1653 void kiblnd_pool_free_node(kib_pool_t *pool, struct list_head *node)
1656 kib_poolset_t *ps = pool->po_owner;
1658 unsigned long now = cfs_time_current();
1660 spin_lock(&ps->ps_lock);
1662 if (ps->ps_node_fini)
1663 ps->ps_node_fini(pool, node);
1665 LASSERT(pool->po_allocated > 0);
1666 list_add(node, &pool->po_free_list);
1667 pool->po_allocated--;
1669 list_for_each_entry_safe(pool, tmp, &ps->ps_pool_list, po_list) {
1670 /* the first pool is persistent */
1671 if (ps->ps_pool_list.next == &pool->po_list)
1674 if (kiblnd_pool_is_idle(pool, now))
1675 list_move(&pool->po_list, &zombies);
1677 spin_unlock(&ps->ps_lock);
1679 if (!list_empty(&zombies))
1680 kiblnd_destroy_pool_list(&zombies);
1683 struct list_head *kiblnd_pool_alloc_node(kib_poolset_t *ps)
1685 struct list_head *node;
1687 unsigned int interval = 1;
1688 unsigned long time_before;
1689 unsigned int trips = 0;
1693 spin_lock(&ps->ps_lock);
1694 list_for_each_entry(pool, &ps->ps_pool_list, po_list) {
1695 if (list_empty(&pool->po_free_list))
1698 pool->po_allocated++;
1699 pool->po_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1700 node = pool->po_free_list.next;
1703 if (ps->ps_node_init) {
1704 /* still hold the lock */
1705 ps->ps_node_init(pool, node);
1707 spin_unlock(&ps->ps_lock);
1711 /* no available tx pool and ... */
1712 if (ps->ps_increasing) {
1713 /* another thread is allocating a new pool */
1714 spin_unlock(&ps->ps_lock);
1716 CDEBUG(D_NET, "Another thread is allocating new %s pool, waiting %d HZs for her to complete. trips = %d\n",
1717 ps->ps_name, interval, trips);
1719 set_current_state(TASK_INTERRUPTIBLE);
1720 schedule_timeout(interval);
1721 if (interval < cfs_time_seconds(1))
1727 if (time_before(cfs_time_current(), ps->ps_next_retry)) {
1728 /* someone failed recently */
1729 spin_unlock(&ps->ps_lock);
1733 ps->ps_increasing = 1;
1734 spin_unlock(&ps->ps_lock);
1736 CDEBUG(D_NET, "%s pool exhausted, allocate new pool\n", ps->ps_name);
1737 time_before = cfs_time_current();
1738 rc = ps->ps_pool_create(ps, ps->ps_pool_size, &pool);
1739 CDEBUG(D_NET, "ps_pool_create took %lu HZ to complete",
1740 cfs_time_current() - time_before);
1742 spin_lock(&ps->ps_lock);
1743 ps->ps_increasing = 0;
1745 list_add_tail(&pool->po_list, &ps->ps_pool_list);
1747 ps->ps_next_retry = cfs_time_shift(IBLND_POOL_RETRY);
1748 CERROR("Can't allocate new %s pool because out of memory\n",
1751 spin_unlock(&ps->ps_lock);
1756 static void kiblnd_destroy_tx_pool(kib_pool_t *pool)
1758 kib_tx_pool_t *tpo = container_of(pool, kib_tx_pool_t, tpo_pool);
1761 LASSERT(!pool->po_allocated);
1763 if (tpo->tpo_tx_pages) {
1764 kiblnd_unmap_tx_pool(tpo);
1765 kiblnd_free_pages(tpo->tpo_tx_pages);
1768 if (!tpo->tpo_tx_descs)
1771 for (i = 0; i < pool->po_size; i++) {
1772 kib_tx_t *tx = &tpo->tpo_tx_descs[i];
1774 list_del(&tx->tx_list);
1776 LIBCFS_FREE(tx->tx_pages,
1778 sizeof(*tx->tx_pages));
1780 LIBCFS_FREE(tx->tx_frags,
1781 IBLND_MAX_RDMA_FRAGS *
1782 sizeof(*tx->tx_frags));
1784 LIBCFS_FREE(tx->tx_wrq,
1785 (1 + IBLND_MAX_RDMA_FRAGS) *
1786 sizeof(*tx->tx_wrq));
1788 LIBCFS_FREE(tx->tx_sge,
1789 (1 + IBLND_MAX_RDMA_FRAGS) *
1790 sizeof(*tx->tx_sge));
1792 LIBCFS_FREE(tx->tx_rd,
1793 offsetof(kib_rdma_desc_t,
1794 rd_frags[IBLND_MAX_RDMA_FRAGS]));
1797 LIBCFS_FREE(tpo->tpo_tx_descs,
1798 pool->po_size * sizeof(kib_tx_t));
1800 kiblnd_fini_pool(pool);
1801 LIBCFS_FREE(tpo, sizeof(*tpo));
1804 static int kiblnd_tx_pool_size(int ncpts)
1806 int ntx = *kiblnd_tunables.kib_ntx / ncpts;
1808 return max(IBLND_TX_POOL, ntx);
1811 static int kiblnd_create_tx_pool(kib_poolset_t *ps, int size,
1819 LIBCFS_CPT_ALLOC(tpo, lnet_cpt_table(), ps->ps_cpt, sizeof(*tpo));
1821 CERROR("Failed to allocate TX pool\n");
1825 pool = &tpo->tpo_pool;
1826 kiblnd_init_pool(ps, pool, size);
1827 tpo->tpo_tx_descs = NULL;
1828 tpo->tpo_tx_pages = NULL;
1830 npg = (size * IBLND_MSG_SIZE + PAGE_SIZE - 1) / PAGE_SIZE;
1831 if (kiblnd_alloc_pages(&tpo->tpo_tx_pages, ps->ps_cpt, npg)) {
1832 CERROR("Can't allocate tx pages: %d\n", npg);
1833 LIBCFS_FREE(tpo, sizeof(*tpo));
1837 LIBCFS_CPT_ALLOC(tpo->tpo_tx_descs, lnet_cpt_table(), ps->ps_cpt,
1838 size * sizeof(kib_tx_t));
1839 if (!tpo->tpo_tx_descs) {
1840 CERROR("Can't allocate %d tx descriptors\n", size);
1841 ps->ps_pool_destroy(pool);
1845 memset(tpo->tpo_tx_descs, 0, size * sizeof(kib_tx_t));
1847 for (i = 0; i < size; i++) {
1848 kib_tx_t *tx = &tpo->tpo_tx_descs[i];
1851 if (ps->ps_net->ibn_fmr_ps) {
1852 LIBCFS_CPT_ALLOC(tx->tx_pages,
1853 lnet_cpt_table(), ps->ps_cpt,
1854 LNET_MAX_IOV * sizeof(*tx->tx_pages));
1859 LIBCFS_CPT_ALLOC(tx->tx_frags, lnet_cpt_table(), ps->ps_cpt,
1860 IBLND_MAX_RDMA_FRAGS * sizeof(*tx->tx_frags));
1864 sg_init_table(tx->tx_frags, IBLND_MAX_RDMA_FRAGS);
1866 LIBCFS_CPT_ALLOC(tx->tx_wrq, lnet_cpt_table(), ps->ps_cpt,
1867 (1 + IBLND_MAX_RDMA_FRAGS) *
1868 sizeof(*tx->tx_wrq));
1872 LIBCFS_CPT_ALLOC(tx->tx_sge, lnet_cpt_table(), ps->ps_cpt,
1873 (1 + IBLND_MAX_RDMA_FRAGS) *
1874 sizeof(*tx->tx_sge));
1878 LIBCFS_CPT_ALLOC(tx->tx_rd, lnet_cpt_table(), ps->ps_cpt,
1879 offsetof(kib_rdma_desc_t,
1880 rd_frags[IBLND_MAX_RDMA_FRAGS]));
1886 kiblnd_map_tx_pool(tpo);
1891 ps->ps_pool_destroy(pool);
1895 static void kiblnd_tx_init(kib_pool_t *pool, struct list_head *node)
1897 kib_tx_poolset_t *tps = container_of(pool->po_owner, kib_tx_poolset_t,
1899 kib_tx_t *tx = list_entry(node, kib_tx_t, tx_list);
1901 tx->tx_cookie = tps->tps_next_tx_cookie++;
1904 static void kiblnd_net_fini_pools(kib_net_t *net)
1908 cfs_cpt_for_each(i, lnet_cpt_table()) {
1909 kib_tx_poolset_t *tps;
1910 kib_fmr_poolset_t *fps;
1912 if (net->ibn_tx_ps) {
1913 tps = net->ibn_tx_ps[i];
1914 kiblnd_fini_poolset(&tps->tps_poolset);
1917 if (net->ibn_fmr_ps) {
1918 fps = net->ibn_fmr_ps[i];
1919 kiblnd_fini_fmr_poolset(fps);
1923 if (net->ibn_tx_ps) {
1924 cfs_percpt_free(net->ibn_tx_ps);
1925 net->ibn_tx_ps = NULL;
1928 if (net->ibn_fmr_ps) {
1929 cfs_percpt_free(net->ibn_fmr_ps);
1930 net->ibn_fmr_ps = NULL;
1934 static int kiblnd_net_init_pools(kib_net_t *net, __u32 *cpts, int ncpts)
1936 unsigned long flags;
1941 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1942 if (!*kiblnd_tunables.kib_map_on_demand) {
1943 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1944 goto create_tx_pool;
1947 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1949 if (*kiblnd_tunables.kib_fmr_pool_size <
1950 *kiblnd_tunables.kib_ntx / 4) {
1951 CERROR("Can't set fmr pool size (%d) < ntx / 4(%d)\n",
1952 *kiblnd_tunables.kib_fmr_pool_size,
1953 *kiblnd_tunables.kib_ntx / 4);
1959 * TX pool must be created later than FMR, see LU-2268
1962 LASSERT(!net->ibn_tx_ps);
1965 * premapping can fail if ibd_nmr > 1, so we always create
1966 * FMR pool and map-on-demand if premapping failed
1968 * cfs_precpt_alloc is creating an array of struct kib_fmr_poolset
1969 * The number of struct kib_fmr_poolsets create is equal to the
1970 * number of CPTs that exist, i.e net->ibn_fmr_ps[cpt].
1972 net->ibn_fmr_ps = cfs_percpt_alloc(lnet_cpt_table(),
1973 sizeof(kib_fmr_poolset_t));
1974 if (!net->ibn_fmr_ps) {
1975 CERROR("Failed to allocate FMR pool array\n");
1980 for (i = 0; i < ncpts; i++) {
1981 cpt = !cpts ? i : cpts[i];
1982 rc = kiblnd_init_fmr_poolset(net->ibn_fmr_ps[cpt], cpt, net,
1983 kiblnd_fmr_pool_size(ncpts),
1984 kiblnd_fmr_flush_trigger(ncpts));
1986 CERROR("Can't initialize FMR pool for CPT %d: %d\n",
1993 LASSERT(i == ncpts);
1997 * cfs_precpt_alloc is creating an array of struct kib_tx_poolset
1998 * The number of struct kib_tx_poolsets create is equal to the
1999 * number of CPTs that exist, i.e net->ibn_tx_ps[cpt].
2001 net->ibn_tx_ps = cfs_percpt_alloc(lnet_cpt_table(),
2002 sizeof(kib_tx_poolset_t));
2003 if (!net->ibn_tx_ps) {
2004 CERROR("Failed to allocate tx pool array\n");
2009 for (i = 0; i < ncpts; i++) {
2010 cpt = !cpts ? i : cpts[i];
2011 rc = kiblnd_init_poolset(&net->ibn_tx_ps[cpt]->tps_poolset,
2013 kiblnd_tx_pool_size(ncpts),
2014 kiblnd_create_tx_pool,
2015 kiblnd_destroy_tx_pool,
2016 kiblnd_tx_init, NULL);
2018 CERROR("Can't initialize TX pool for CPT %d: %d\n",
2026 kiblnd_net_fini_pools(net);
2031 static int kiblnd_hdev_get_attr(kib_hca_dev_t *hdev)
2034 * It's safe to assume a HCA can handle a page size
2035 * matching that of the native system
2037 hdev->ibh_page_shift = PAGE_SHIFT;
2038 hdev->ibh_page_size = 1 << PAGE_SHIFT;
2039 hdev->ibh_page_mask = ~((__u64)hdev->ibh_page_size - 1);
2041 hdev->ibh_mr_size = hdev->ibh_ibdev->attrs.max_mr_size;
2042 if (hdev->ibh_mr_size == ~0ULL) {
2043 hdev->ibh_mr_shift = 64;
2047 CERROR("Invalid mr size: %#llx\n", hdev->ibh_mr_size);
2051 static void kiblnd_hdev_cleanup_mrs(kib_hca_dev_t *hdev)
2056 ib_dereg_mr(hdev->ibh_mrs);
2058 hdev->ibh_mrs = NULL;
2061 void kiblnd_hdev_destroy(kib_hca_dev_t *hdev)
2063 kiblnd_hdev_cleanup_mrs(hdev);
2066 ib_dealloc_pd(hdev->ibh_pd);
2069 rdma_destroy_id(hdev->ibh_cmid);
2071 LIBCFS_FREE(hdev, sizeof(*hdev));
2074 static int kiblnd_hdev_setup_mrs(kib_hca_dev_t *hdev)
2078 int acflags = IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE;
2080 rc = kiblnd_hdev_get_attr(hdev);
2084 mr = ib_get_dma_mr(hdev->ibh_pd, acflags);
2086 CERROR("Failed ib_get_dma_mr : %ld\n", PTR_ERR(mr));
2087 kiblnd_hdev_cleanup_mrs(hdev);
2097 static int kiblnd_dummy_callback(struct rdma_cm_id *cmid,
2098 struct rdma_cm_event *event)
2103 static int kiblnd_dev_need_failover(kib_dev_t *dev)
2105 struct rdma_cm_id *cmid;
2106 struct sockaddr_in srcaddr;
2107 struct sockaddr_in dstaddr;
2110 if (!dev->ibd_hdev || /* initializing */
2111 !dev->ibd_hdev->ibh_cmid || /* listener is dead */
2112 *kiblnd_tunables.kib_dev_failover > 1) /* debugging */
2116 * XXX: it's UGLY, but I don't have better way to find
2117 * ib-bonding HCA failover because:
2119 * a. no reliable CM event for HCA failover...
2120 * b. no OFED API to get ib_device for current net_device...
2122 * We have only two choices at this point:
2124 * a. rdma_bind_addr(), it will conflict with listener cmid
2125 * b. rdma_resolve_addr() to zero addr
2127 cmid = kiblnd_rdma_create_id(kiblnd_dummy_callback, dev, RDMA_PS_TCP,
2131 CERROR("Failed to create cmid for failover: %d\n", rc);
2135 memset(&srcaddr, 0, sizeof(srcaddr));
2136 srcaddr.sin_family = AF_INET;
2137 srcaddr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2139 memset(&dstaddr, 0, sizeof(dstaddr));
2140 dstaddr.sin_family = AF_INET;
2141 rc = rdma_resolve_addr(cmid, (struct sockaddr *)&srcaddr,
2142 (struct sockaddr *)&dstaddr, 1);
2143 if (rc || !cmid->device) {
2144 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2145 dev->ibd_ifname, &dev->ibd_ifip,
2147 rdma_destroy_id(cmid);
2151 rc = dev->ibd_hdev->ibh_ibdev != cmid->device; /* true for failover */
2152 rdma_destroy_id(cmid);
2157 int kiblnd_dev_failover(kib_dev_t *dev)
2159 LIST_HEAD(zombie_tpo);
2160 LIST_HEAD(zombie_ppo);
2161 LIST_HEAD(zombie_fpo);
2162 struct rdma_cm_id *cmid = NULL;
2163 kib_hca_dev_t *hdev = NULL;
2166 struct sockaddr_in addr;
2167 unsigned long flags;
2171 LASSERT(*kiblnd_tunables.kib_dev_failover > 1 ||
2172 dev->ibd_can_failover || !dev->ibd_hdev);
2174 rc = kiblnd_dev_need_failover(dev);
2178 if (dev->ibd_hdev &&
2179 dev->ibd_hdev->ibh_cmid) {
2181 * XXX it's not good to close old listener at here,
2182 * because we can fail to create new listener.
2183 * But we have to close it now, otherwise rdma_bind_addr
2184 * will return EADDRINUSE... How crap!
2186 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2188 cmid = dev->ibd_hdev->ibh_cmid;
2190 * make next schedule of kiblnd_dev_need_failover()
2193 dev->ibd_hdev->ibh_cmid = NULL;
2194 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2196 rdma_destroy_id(cmid);
2199 cmid = kiblnd_rdma_create_id(kiblnd_cm_callback, dev, RDMA_PS_TCP,
2203 CERROR("Failed to create cmid for failover: %d\n", rc);
2207 memset(&addr, 0, sizeof(addr));
2208 addr.sin_family = AF_INET;
2209 addr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2210 addr.sin_port = htons(*kiblnd_tunables.kib_service);
2212 /* Bind to failover device or port */
2213 rc = rdma_bind_addr(cmid, (struct sockaddr *)&addr);
2214 if (rc || !cmid->device) {
2215 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2216 dev->ibd_ifname, &dev->ibd_ifip,
2218 rdma_destroy_id(cmid);
2222 LIBCFS_ALLOC(hdev, sizeof(*hdev));
2224 CERROR("Failed to allocate kib_hca_dev\n");
2225 rdma_destroy_id(cmid);
2230 atomic_set(&hdev->ibh_ref, 1);
2231 hdev->ibh_dev = dev;
2232 hdev->ibh_cmid = cmid;
2233 hdev->ibh_ibdev = cmid->device;
2235 pd = ib_alloc_pd(cmid->device);
2238 CERROR("Can't allocate PD: %d\n", rc);
2244 rc = rdma_listen(cmid, 0);
2246 CERROR("Can't start new listener: %d\n", rc);
2250 rc = kiblnd_hdev_setup_mrs(hdev);
2252 CERROR("Can't setup device: %d\n", rc);
2256 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2258 swap(dev->ibd_hdev, hdev); /* take over the refcount */
2260 list_for_each_entry(net, &dev->ibd_nets, ibn_list) {
2261 cfs_cpt_for_each(i, lnet_cpt_table()) {
2262 kiblnd_fail_poolset(&net->ibn_tx_ps[i]->tps_poolset,
2265 if (net->ibn_fmr_ps)
2266 kiblnd_fail_fmr_poolset(net->ibn_fmr_ps[i],
2271 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2273 if (!list_empty(&zombie_tpo))
2274 kiblnd_destroy_pool_list(&zombie_tpo);
2275 if (!list_empty(&zombie_ppo))
2276 kiblnd_destroy_pool_list(&zombie_ppo);
2277 if (!list_empty(&zombie_fpo))
2278 kiblnd_destroy_fmr_pool_list(&zombie_fpo);
2280 kiblnd_hdev_decref(hdev);
2283 dev->ibd_failed_failover++;
2285 dev->ibd_failed_failover = 0;
2290 void kiblnd_destroy_dev(kib_dev_t *dev)
2292 LASSERT(!dev->ibd_nnets);
2293 LASSERT(list_empty(&dev->ibd_nets));
2295 list_del(&dev->ibd_fail_list);
2296 list_del(&dev->ibd_list);
2299 kiblnd_hdev_decref(dev->ibd_hdev);
2301 LIBCFS_FREE(dev, sizeof(*dev));
2304 static kib_dev_t *kiblnd_create_dev(char *ifname)
2306 struct net_device *netdev;
2313 rc = lnet_ipif_query(ifname, &up, &ip, &netmask);
2315 CERROR("Can't query IPoIB interface %s: %d\n",
2321 CERROR("Can't query IPoIB interface %s: it's down\n", ifname);
2325 LIBCFS_ALLOC(dev, sizeof(*dev));
2329 netdev = dev_get_by_name(&init_net, ifname);
2331 dev->ibd_can_failover = 0;
2333 dev->ibd_can_failover = !!(netdev->flags & IFF_MASTER);
2337 INIT_LIST_HEAD(&dev->ibd_nets);
2338 INIT_LIST_HEAD(&dev->ibd_list); /* not yet in kib_devs */
2339 INIT_LIST_HEAD(&dev->ibd_fail_list);
2341 strcpy(&dev->ibd_ifname[0], ifname);
2343 /* initialize the device */
2344 rc = kiblnd_dev_failover(dev);
2346 CERROR("Can't initialize device: %d\n", rc);
2347 LIBCFS_FREE(dev, sizeof(*dev));
2351 list_add_tail(&dev->ibd_list, &kiblnd_data.kib_devs);
2355 static void kiblnd_base_shutdown(void)
2357 struct kib_sched_info *sched;
2360 LASSERT(list_empty(&kiblnd_data.kib_devs));
2362 switch (kiblnd_data.kib_init) {
2366 case IBLND_INIT_ALL:
2367 case IBLND_INIT_DATA:
2368 LASSERT(kiblnd_data.kib_peers);
2369 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++)
2370 LASSERT(list_empty(&kiblnd_data.kib_peers[i]));
2371 LASSERT(list_empty(&kiblnd_data.kib_connd_zombies));
2372 LASSERT(list_empty(&kiblnd_data.kib_connd_conns));
2373 LASSERT(list_empty(&kiblnd_data.kib_reconn_list));
2374 LASSERT(list_empty(&kiblnd_data.kib_reconn_wait));
2376 /* flag threads to terminate; wake and wait for them to die */
2377 kiblnd_data.kib_shutdown = 1;
2380 * NB: we really want to stop scheduler threads net by net
2381 * instead of the whole module, this should be improved
2382 * with dynamic configuration LNet
2384 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds)
2385 wake_up_all(&sched->ibs_waitq);
2387 wake_up_all(&kiblnd_data.kib_connd_waitq);
2388 wake_up_all(&kiblnd_data.kib_failover_waitq);
2391 while (atomic_read(&kiblnd_data.kib_nthreads)) {
2394 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET,
2395 "Waiting for %d threads to terminate\n",
2396 atomic_read(&kiblnd_data.kib_nthreads));
2397 set_current_state(TASK_UNINTERRUPTIBLE);
2398 schedule_timeout(cfs_time_seconds(1));
2403 case IBLND_INIT_NOTHING:
2407 if (kiblnd_data.kib_peers) {
2408 LIBCFS_FREE(kiblnd_data.kib_peers,
2409 sizeof(struct list_head) *
2410 kiblnd_data.kib_peer_hash_size);
2413 if (kiblnd_data.kib_scheds)
2414 cfs_percpt_free(kiblnd_data.kib_scheds);
2416 kiblnd_data.kib_init = IBLND_INIT_NOTHING;
2417 module_put(THIS_MODULE);
2420 static void kiblnd_shutdown(lnet_ni_t *ni)
2422 kib_net_t *net = ni->ni_data;
2423 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2425 unsigned long flags;
2427 LASSERT(kiblnd_data.kib_init == IBLND_INIT_ALL);
2432 write_lock_irqsave(g_lock, flags);
2433 net->ibn_shutdown = 1;
2434 write_unlock_irqrestore(g_lock, flags);
2436 switch (net->ibn_init) {
2440 case IBLND_INIT_ALL:
2441 /* nuke all existing peers within this net */
2442 kiblnd_del_peer(ni, LNET_NID_ANY);
2444 /* Wait for all peer state to clean up */
2446 while (atomic_read(&net->ibn_npeers)) {
2448 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* 2**n? */
2449 "%s: waiting for %d peers to disconnect\n",
2450 libcfs_nid2str(ni->ni_nid),
2451 atomic_read(&net->ibn_npeers));
2452 set_current_state(TASK_UNINTERRUPTIBLE);
2453 schedule_timeout(cfs_time_seconds(1));
2456 kiblnd_net_fini_pools(net);
2458 write_lock_irqsave(g_lock, flags);
2459 LASSERT(net->ibn_dev->ibd_nnets > 0);
2460 net->ibn_dev->ibd_nnets--;
2461 list_del(&net->ibn_list);
2462 write_unlock_irqrestore(g_lock, flags);
2466 case IBLND_INIT_NOTHING:
2467 LASSERT(!atomic_read(&net->ibn_nconns));
2469 if (net->ibn_dev && !net->ibn_dev->ibd_nnets)
2470 kiblnd_destroy_dev(net->ibn_dev);
2475 net->ibn_init = IBLND_INIT_NOTHING;
2478 LIBCFS_FREE(net, sizeof(*net));
2481 if (list_empty(&kiblnd_data.kib_devs))
2482 kiblnd_base_shutdown();
2485 static int kiblnd_base_startup(void)
2487 struct kib_sched_info *sched;
2491 LASSERT(kiblnd_data.kib_init == IBLND_INIT_NOTHING);
2493 try_module_get(THIS_MODULE);
2494 /* zero pointers, flags etc */
2495 memset(&kiblnd_data, 0, sizeof(kiblnd_data));
2497 rwlock_init(&kiblnd_data.kib_global_lock);
2499 INIT_LIST_HEAD(&kiblnd_data.kib_devs);
2500 INIT_LIST_HEAD(&kiblnd_data.kib_failed_devs);
2502 kiblnd_data.kib_peer_hash_size = IBLND_PEER_HASH_SIZE;
2503 LIBCFS_ALLOC(kiblnd_data.kib_peers,
2504 sizeof(struct list_head) * kiblnd_data.kib_peer_hash_size);
2505 if (!kiblnd_data.kib_peers)
2507 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++)
2508 INIT_LIST_HEAD(&kiblnd_data.kib_peers[i]);
2510 spin_lock_init(&kiblnd_data.kib_connd_lock);
2511 INIT_LIST_HEAD(&kiblnd_data.kib_connd_conns);
2512 INIT_LIST_HEAD(&kiblnd_data.kib_connd_zombies);
2513 INIT_LIST_HEAD(&kiblnd_data.kib_reconn_list);
2514 INIT_LIST_HEAD(&kiblnd_data.kib_reconn_wait);
2516 init_waitqueue_head(&kiblnd_data.kib_connd_waitq);
2517 init_waitqueue_head(&kiblnd_data.kib_failover_waitq);
2519 kiblnd_data.kib_scheds = cfs_percpt_alloc(lnet_cpt_table(),
2521 if (!kiblnd_data.kib_scheds)
2524 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
2527 spin_lock_init(&sched->ibs_lock);
2528 INIT_LIST_HEAD(&sched->ibs_conns);
2529 init_waitqueue_head(&sched->ibs_waitq);
2531 nthrs = cfs_cpt_weight(lnet_cpt_table(), i);
2532 if (*kiblnd_tunables.kib_nscheds > 0) {
2533 nthrs = min(nthrs, *kiblnd_tunables.kib_nscheds);
2536 * max to half of CPUs, another half is reserved for
2537 * upper layer modules
2539 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
2542 sched->ibs_nthreads_max = nthrs;
2546 kiblnd_data.kib_error_qpa.qp_state = IB_QPS_ERR;
2548 /* lists/ptrs/locks initialised */
2549 kiblnd_data.kib_init = IBLND_INIT_DATA;
2550 /*****************************************************/
2552 rc = kiblnd_thread_start(kiblnd_connd, NULL, "kiblnd_connd");
2554 CERROR("Can't spawn o2iblnd connd: %d\n", rc);
2558 if (*kiblnd_tunables.kib_dev_failover)
2559 rc = kiblnd_thread_start(kiblnd_failover_thread, NULL,
2563 CERROR("Can't spawn o2iblnd failover thread: %d\n", rc);
2567 /* flag everything initialised */
2568 kiblnd_data.kib_init = IBLND_INIT_ALL;
2569 /*****************************************************/
2574 kiblnd_base_shutdown();
2578 static int kiblnd_start_schedulers(struct kib_sched_info *sched)
2584 if (!sched->ibs_nthreads) {
2585 if (*kiblnd_tunables.kib_nscheds > 0) {
2586 nthrs = sched->ibs_nthreads_max;
2588 nthrs = cfs_cpt_weight(lnet_cpt_table(),
2590 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
2591 nthrs = min(IBLND_N_SCHED_HIGH, nthrs);
2594 LASSERT(sched->ibs_nthreads <= sched->ibs_nthreads_max);
2595 /* increase one thread if there is new interface */
2596 nthrs = sched->ibs_nthreads < sched->ibs_nthreads_max;
2599 for (i = 0; i < nthrs; i++) {
2603 id = KIB_THREAD_ID(sched->ibs_cpt, sched->ibs_nthreads + i);
2604 snprintf(name, sizeof(name), "kiblnd_sd_%02ld_%02ld",
2605 KIB_THREAD_CPT(id), KIB_THREAD_TID(id));
2606 rc = kiblnd_thread_start(kiblnd_scheduler, (void *)id, name);
2610 CERROR("Can't spawn thread %d for scheduler[%d]: %d\n",
2611 sched->ibs_cpt, sched->ibs_nthreads + i, rc);
2615 sched->ibs_nthreads += i;
2619 static int kiblnd_dev_start_threads(kib_dev_t *dev, int newdev, __u32 *cpts,
2626 for (i = 0; i < ncpts; i++) {
2627 struct kib_sched_info *sched;
2629 cpt = !cpts ? i : cpts[i];
2630 sched = kiblnd_data.kib_scheds[cpt];
2632 if (!newdev && sched->ibs_nthreads > 0)
2635 rc = kiblnd_start_schedulers(kiblnd_data.kib_scheds[cpt]);
2637 CERROR("Failed to start scheduler threads for %s\n",
2645 static kib_dev_t *kiblnd_dev_search(char *ifname)
2647 kib_dev_t *alias = NULL;
2652 colon = strchr(ifname, ':');
2653 list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) {
2654 if (!strcmp(&dev->ibd_ifname[0], ifname))
2660 colon2 = strchr(dev->ibd_ifname, ':');
2666 if (!strcmp(&dev->ibd_ifname[0], ifname))
2677 static int kiblnd_startup(lnet_ni_t *ni)
2680 kib_dev_t *ibdev = NULL;
2682 struct timespec64 tv;
2683 unsigned long flags;
2687 LASSERT(ni->ni_lnd == &the_o2iblnd);
2689 if (kiblnd_data.kib_init == IBLND_INIT_NOTHING) {
2690 rc = kiblnd_base_startup();
2695 LIBCFS_ALLOC(net, sizeof(*net));
2700 ktime_get_real_ts64(&tv);
2701 net->ibn_incarnation = tv.tv_sec * USEC_PER_SEC +
2702 tv.tv_nsec / NSEC_PER_USEC;
2704 ni->ni_peertimeout = *kiblnd_tunables.kib_peertimeout;
2705 ni->ni_maxtxcredits = *kiblnd_tunables.kib_credits;
2706 ni->ni_peertxcredits = *kiblnd_tunables.kib_peertxcredits;
2707 ni->ni_peerrtrcredits = *kiblnd_tunables.kib_peerrtrcredits;
2709 if (ni->ni_interfaces[0]) {
2710 /* Use the IPoIB interface specified in 'networks=' */
2712 CLASSERT(LNET_MAX_INTERFACES > 1);
2713 if (ni->ni_interfaces[1]) {
2714 CERROR("Multiple interfaces not supported\n");
2718 ifname = ni->ni_interfaces[0];
2720 ifname = *kiblnd_tunables.kib_default_ipif;
2723 if (strlen(ifname) >= sizeof(ibdev->ibd_ifname)) {
2724 CERROR("IPoIB interface name too long: %s\n", ifname);
2728 ibdev = kiblnd_dev_search(ifname);
2731 /* hmm...create kib_dev even for alias */
2732 if (!ibdev || strcmp(&ibdev->ibd_ifname[0], ifname))
2733 ibdev = kiblnd_create_dev(ifname);
2738 net->ibn_dev = ibdev;
2739 ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid), ibdev->ibd_ifip);
2741 rc = kiblnd_dev_start_threads(ibdev, newdev,
2742 ni->ni_cpts, ni->ni_ncpts);
2746 rc = kiblnd_net_init_pools(net, ni->ni_cpts, ni->ni_ncpts);
2748 CERROR("Failed to initialize NI pools: %d\n", rc);
2752 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2754 list_add_tail(&net->ibn_list, &ibdev->ibd_nets);
2755 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2757 net->ibn_init = IBLND_INIT_ALL;
2762 if (!net->ibn_dev && ibdev)
2763 kiblnd_destroy_dev(ibdev);
2766 kiblnd_shutdown(ni);
2768 CDEBUG(D_NET, "kiblnd_startup failed\n");
2772 static lnd_t the_o2iblnd = {
2773 .lnd_type = O2IBLND,
2774 .lnd_startup = kiblnd_startup,
2775 .lnd_shutdown = kiblnd_shutdown,
2776 .lnd_ctl = kiblnd_ctl,
2777 .lnd_query = kiblnd_query,
2778 .lnd_send = kiblnd_send,
2779 .lnd_recv = kiblnd_recv,
2782 static void __exit ko2iblnd_exit(void)
2784 lnet_unregister_lnd(&the_o2iblnd);
2787 static int __init ko2iblnd_init(void)
2791 CLASSERT(sizeof(kib_msg_t) <= IBLND_MSG_SIZE);
2792 CLASSERT(offsetof(kib_msg_t,
2793 ibm_u.get.ibgm_rd.rd_frags[IBLND_MAX_RDMA_FRAGS])
2795 CLASSERT(offsetof(kib_msg_t,
2796 ibm_u.putack.ibpam_rd.rd_frags[IBLND_MAX_RDMA_FRAGS])
2799 rc = kiblnd_tunables_init();
2803 lnet_register_lnd(&the_o2iblnd);
2808 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
2809 MODULE_DESCRIPTION("OpenIB gen2 LNet Network Driver");
2810 MODULE_VERSION("2.7.0");
2811 MODULE_LICENSE("GPL");
2813 module_init(ko2iblnd_init);
2814 module_exit(ko2iblnd_exit);