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, 2015, 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>
37 #include <asm/div64.h>
41 static lnd_t the_o2iblnd;
43 struct kib_data kiblnd_data;
45 static __u32 kiblnd_cksum(void *ptr, int nob)
51 sum = ((sum << 1) | (sum >> 31)) + *c++;
53 /* ensure I don't return 0 (== no checksum) */
54 return !sum ? 1 : sum;
57 static char *kiblnd_msgtype2str(int type)
60 case IBLND_MSG_CONNREQ:
63 case IBLND_MSG_CONNACK:
69 case IBLND_MSG_IMMEDIATE:
72 case IBLND_MSG_PUT_REQ:
75 case IBLND_MSG_PUT_NAK:
78 case IBLND_MSG_PUT_ACK:
81 case IBLND_MSG_PUT_DONE:
84 case IBLND_MSG_GET_REQ:
87 case IBLND_MSG_GET_DONE:
95 static int kiblnd_msgtype2size(int type)
97 const int hdr_size = offsetof(struct kib_msg, ibm_u);
100 case IBLND_MSG_CONNREQ:
101 case IBLND_MSG_CONNACK:
102 return hdr_size + sizeof(struct kib_connparams);
107 case IBLND_MSG_IMMEDIATE:
108 return offsetof(struct kib_msg, ibm_u.immediate.ibim_payload[0]);
110 case IBLND_MSG_PUT_REQ:
111 return hdr_size + sizeof(struct kib_putreq_msg);
113 case IBLND_MSG_PUT_ACK:
114 return hdr_size + sizeof(struct kib_putack_msg);
116 case IBLND_MSG_GET_REQ:
117 return hdr_size + sizeof(struct kib_get_msg);
119 case IBLND_MSG_PUT_NAK:
120 case IBLND_MSG_PUT_DONE:
121 case IBLND_MSG_GET_DONE:
122 return hdr_size + sizeof(struct kib_completion_msg);
128 static int kiblnd_unpack_rd(struct kib_msg *msg, int flip)
130 struct kib_rdma_desc *rd;
136 LASSERT(msg->ibm_type == IBLND_MSG_GET_REQ ||
137 msg->ibm_type == IBLND_MSG_PUT_ACK);
139 rd = msg->ibm_type == IBLND_MSG_GET_REQ ?
140 &msg->ibm_u.get.ibgm_rd :
141 &msg->ibm_u.putack.ibpam_rd;
144 __swab32s(&rd->rd_key);
145 __swab32s(&rd->rd_nfrags);
150 nob = offsetof(struct kib_msg, ibm_u) +
151 kiblnd_rd_msg_size(rd, msg->ibm_type, n);
153 if (msg->ibm_nob < nob) {
154 CERROR("Short %s: %d(%d)\n",
155 kiblnd_msgtype2str(msg->ibm_type), msg->ibm_nob, nob);
159 msg_size = kiblnd_rd_size(rd);
160 if (msg_size <= 0 || msg_size > LNET_MAX_PAYLOAD) {
161 CERROR("Bad msg_size: %d, should be 0 < n <= %d\n",
162 msg_size, LNET_MAX_PAYLOAD);
169 for (i = 0; i < n; i++) {
170 __swab32s(&rd->rd_frags[i].rf_nob);
171 __swab64s(&rd->rd_frags[i].rf_addr);
177 void kiblnd_pack_msg(lnet_ni_t *ni, struct kib_msg *msg, int version,
178 int credits, lnet_nid_t dstnid, __u64 dststamp)
180 struct kib_net *net = ni->ni_data;
183 * CAVEAT EMPTOR! all message fields not set here should have been
184 * 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);
245 * checksum must be computed with ibm_cksum zero and BEFORE anything
248 msg_cksum = flip ? __swab32(msg->ibm_cksum) : msg->ibm_cksum;
251 msg_cksum != kiblnd_cksum(msg, msg_nob)) {
252 CERROR("Bad checksum\n");
256 msg->ibm_cksum = msg_cksum;
259 /* leave magic unflipped as a clue to peer endianness */
260 msg->ibm_version = version;
261 CLASSERT(sizeof(msg->ibm_type) == 1);
262 CLASSERT(sizeof(msg->ibm_credits) == 1);
263 msg->ibm_nob = msg_nob;
264 __swab64s(&msg->ibm_srcnid);
265 __swab64s(&msg->ibm_srcstamp);
266 __swab64s(&msg->ibm_dstnid);
267 __swab64s(&msg->ibm_dststamp);
270 if (msg->ibm_srcnid == LNET_NID_ANY) {
271 CERROR("Bad src nid: %s\n", libcfs_nid2str(msg->ibm_srcnid));
275 if (msg_nob < kiblnd_msgtype2size(msg->ibm_type)) {
276 CERROR("Short %s: %d(%d)\n", kiblnd_msgtype2str(msg->ibm_type),
277 msg_nob, kiblnd_msgtype2size(msg->ibm_type));
281 switch (msg->ibm_type) {
283 CERROR("Unknown message type %x\n", msg->ibm_type);
287 case IBLND_MSG_IMMEDIATE:
288 case IBLND_MSG_PUT_REQ:
291 case IBLND_MSG_PUT_ACK:
292 case IBLND_MSG_GET_REQ:
293 if (kiblnd_unpack_rd(msg, flip))
297 case IBLND_MSG_PUT_NAK:
298 case IBLND_MSG_PUT_DONE:
299 case IBLND_MSG_GET_DONE:
301 __swab32s(&msg->ibm_u.completion.ibcm_status);
304 case IBLND_MSG_CONNREQ:
305 case IBLND_MSG_CONNACK:
307 __swab16s(&msg->ibm_u.connparams.ibcp_queue_depth);
308 __swab16s(&msg->ibm_u.connparams.ibcp_max_frags);
309 __swab32s(&msg->ibm_u.connparams.ibcp_max_msg_size);
316 int kiblnd_create_peer(lnet_ni_t *ni, struct kib_peer **peerp, lnet_nid_t nid)
318 struct kib_peer *peer;
319 struct kib_net *net = ni->ni_data;
320 int cpt = lnet_cpt_of_nid(nid);
324 LASSERT(nid != LNET_NID_ANY);
326 LIBCFS_CPT_ALLOC(peer, lnet_cpt_table(), cpt, sizeof(*peer));
328 CERROR("Cannot allocate peer\n");
335 peer->ibp_last_alive = 0;
336 peer->ibp_max_frags = kiblnd_cfg_rdma_frags(peer->ibp_ni);
337 peer->ibp_queue_depth = ni->ni_peertxcredits;
338 atomic_set(&peer->ibp_refcount, 1); /* 1 ref for caller */
340 INIT_LIST_HEAD(&peer->ibp_list); /* not in the peer table yet */
341 INIT_LIST_HEAD(&peer->ibp_conns);
342 INIT_LIST_HEAD(&peer->ibp_tx_queue);
344 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
346 /* always called with a ref on ni, which prevents ni being shutdown */
347 LASSERT(!net->ibn_shutdown);
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);
358 void kiblnd_destroy_peer(struct kib_peer *peer)
360 struct kib_net *net = peer->ibp_ni->ni_data;
363 LASSERT(!atomic_read(&peer->ibp_refcount));
364 LASSERT(!kiblnd_peer_active(peer));
365 LASSERT(kiblnd_peer_idle(peer));
366 LASSERT(list_empty(&peer->ibp_tx_queue));
368 LIBCFS_FREE(peer, sizeof(*peer));
371 * NB a peer's connections keep a reference on their peer until
372 * they are destroyed, so we can be assured that _all_ state to do
373 * with this peer has been cleaned up when its refcount drops to
376 atomic_dec(&net->ibn_npeers);
379 struct kib_peer *kiblnd_find_peer_locked(lnet_nid_t nid)
382 * the caller is responsible for accounting the additional reference
385 struct list_head *peer_list = kiblnd_nid2peerlist(nid);
386 struct list_head *tmp;
387 struct kib_peer *peer;
389 list_for_each(tmp, peer_list) {
390 peer = list_entry(tmp, struct kib_peer, ibp_list);
391 LASSERT(!kiblnd_peer_idle(peer));
393 if (peer->ibp_nid != nid)
396 CDEBUG(D_NET, "got peer [%p] -> %s (%d) version: %x\n",
397 peer, libcfs_nid2str(nid),
398 atomic_read(&peer->ibp_refcount),
405 void kiblnd_unlink_peer_locked(struct kib_peer *peer)
407 LASSERT(list_empty(&peer->ibp_conns));
409 LASSERT(kiblnd_peer_active(peer));
410 list_del_init(&peer->ibp_list);
411 /* lose peerlist's ref */
412 kiblnd_peer_decref(peer);
415 static int kiblnd_get_peer_info(lnet_ni_t *ni, int index,
416 lnet_nid_t *nidp, int *count)
418 struct kib_peer *peer;
419 struct list_head *ptmp;
423 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
425 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
426 list_for_each(ptmp, &kiblnd_data.kib_peers[i]) {
427 peer = list_entry(ptmp, struct kib_peer, ibp_list);
428 LASSERT(!kiblnd_peer_idle(peer));
430 if (peer->ibp_ni != ni)
436 *nidp = peer->ibp_nid;
437 *count = atomic_read(&peer->ibp_refcount);
439 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
445 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
449 static void kiblnd_del_peer_locked(struct kib_peer *peer)
451 struct list_head *ctmp;
452 struct list_head *cnxt;
453 struct kib_conn *conn;
455 if (list_empty(&peer->ibp_conns)) {
456 kiblnd_unlink_peer_locked(peer);
458 list_for_each_safe(ctmp, cnxt, &peer->ibp_conns) {
459 conn = list_entry(ctmp, struct kib_conn, ibc_list);
461 kiblnd_close_conn_locked(conn, 0);
463 /* NB closing peer's last conn unlinked it. */
466 * NB peer now unlinked; might even be freed if the peer table had the
471 static int kiblnd_del_peer(lnet_ni_t *ni, lnet_nid_t nid)
474 struct list_head *ptmp;
475 struct list_head *pnxt;
476 struct kib_peer *peer;
483 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
485 if (nid != LNET_NID_ANY) {
486 lo = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
487 hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
490 hi = kiblnd_data.kib_peer_hash_size - 1;
493 for (i = lo; i <= hi; i++) {
494 list_for_each_safe(ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
495 peer = list_entry(ptmp, struct kib_peer, ibp_list);
496 LASSERT(!kiblnd_peer_idle(peer));
498 if (peer->ibp_ni != ni)
501 if (!(nid == LNET_NID_ANY || peer->ibp_nid == nid))
504 if (!list_empty(&peer->ibp_tx_queue)) {
505 LASSERT(list_empty(&peer->ibp_conns));
507 list_splice_init(&peer->ibp_tx_queue,
511 kiblnd_del_peer_locked(peer);
512 rc = 0; /* matched something */
516 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
518 kiblnd_txlist_done(ni, &zombies, -EIO);
523 static struct kib_conn *kiblnd_get_conn_by_idx(lnet_ni_t *ni, int index)
525 struct kib_peer *peer;
526 struct list_head *ptmp;
527 struct kib_conn *conn;
528 struct list_head *ctmp;
532 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
534 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
535 list_for_each(ptmp, &kiblnd_data.kib_peers[i]) {
536 peer = list_entry(ptmp, struct kib_peer, ibp_list);
537 LASSERT(!kiblnd_peer_idle(peer));
539 if (peer->ibp_ni != ni)
542 list_for_each(ctmp, &peer->ibp_conns) {
546 conn = list_entry(ctmp, struct kib_conn,
548 kiblnd_conn_addref(conn);
549 read_unlock_irqrestore(
550 &kiblnd_data.kib_global_lock,
557 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
561 int kiblnd_translate_mtu(int value)
581 static void kiblnd_setup_mtu_locked(struct rdma_cm_id *cmid)
585 /* XXX There is no path record for iWARP, set by netdev->change_mtu? */
586 if (!cmid->route.path_rec)
589 mtu = kiblnd_translate_mtu(*kiblnd_tunables.kib_ib_mtu);
592 cmid->route.path_rec->mtu = mtu;
595 static int kiblnd_get_completion_vector(struct kib_conn *conn, int cpt)
601 lnet_nid_t nid = conn->ibc_peer->ibp_nid;
603 vectors = conn->ibc_cmid->device->num_comp_vectors;
607 mask = cfs_cpt_cpumask(lnet_cpt_table(), cpt);
611 /* hash NID to CPU id in this partition... */
612 off = do_div(nid, cpumask_weight(mask));
613 for_each_cpu(i, mask) {
622 struct kib_conn *kiblnd_create_conn(struct kib_peer *peer, struct rdma_cm_id *cmid,
623 int state, int version)
627 * If the new conn is created successfully it takes over the caller's
628 * ref on 'peer'. It also "owns" 'cmid' and destroys it when it itself
629 * is destroyed. On failure, the caller's ref on 'peer' remains and
630 * she must dispose of 'cmid'. (Actually I'd block forever if I tried
631 * to destroy 'cmid' here since I'm called from the CM which still has
632 * its ref on 'cmid').
634 rwlock_t *glock = &kiblnd_data.kib_global_lock;
635 struct kib_net *net = peer->ibp_ni->ni_data;
637 struct ib_qp_init_attr *init_qp_attr;
638 struct kib_sched_info *sched;
639 struct ib_cq_init_attr cq_attr = {};
640 struct kib_conn *conn;
648 LASSERT(!in_interrupt());
652 cpt = lnet_cpt_of_nid(peer->ibp_nid);
653 sched = kiblnd_data.kib_scheds[cpt];
655 LASSERT(sched->ibs_nthreads > 0);
657 LIBCFS_CPT_ALLOC(init_qp_attr, lnet_cpt_table(), cpt,
658 sizeof(*init_qp_attr));
660 CERROR("Can't allocate qp_attr for %s\n",
661 libcfs_nid2str(peer->ibp_nid));
665 LIBCFS_CPT_ALLOC(conn, lnet_cpt_table(), cpt, sizeof(*conn));
667 CERROR("Can't allocate connection for %s\n",
668 libcfs_nid2str(peer->ibp_nid));
672 conn->ibc_state = IBLND_CONN_INIT;
673 conn->ibc_version = version;
674 conn->ibc_peer = peer; /* I take the caller's ref */
675 cmid->context = conn; /* for future CM callbacks */
676 conn->ibc_cmid = cmid;
677 conn->ibc_max_frags = peer->ibp_max_frags;
678 conn->ibc_queue_depth = peer->ibp_queue_depth;
680 INIT_LIST_HEAD(&conn->ibc_early_rxs);
681 INIT_LIST_HEAD(&conn->ibc_tx_noops);
682 INIT_LIST_HEAD(&conn->ibc_tx_queue);
683 INIT_LIST_HEAD(&conn->ibc_tx_queue_rsrvd);
684 INIT_LIST_HEAD(&conn->ibc_tx_queue_nocred);
685 INIT_LIST_HEAD(&conn->ibc_active_txs);
686 spin_lock_init(&conn->ibc_lock);
688 LIBCFS_CPT_ALLOC(conn->ibc_connvars, lnet_cpt_table(), cpt,
689 sizeof(*conn->ibc_connvars));
690 if (!conn->ibc_connvars) {
691 CERROR("Can't allocate in-progress connection state\n");
695 write_lock_irqsave(glock, flags);
696 if (dev->ibd_failover) {
697 write_unlock_irqrestore(glock, flags);
698 CERROR("%s: failover in progress\n", dev->ibd_ifname);
702 if (dev->ibd_hdev->ibh_ibdev != cmid->device) {
703 /* wakeup failover thread and teardown connection */
704 if (kiblnd_dev_can_failover(dev)) {
705 list_add_tail(&dev->ibd_fail_list,
706 &kiblnd_data.kib_failed_devs);
707 wake_up(&kiblnd_data.kib_failover_waitq);
710 write_unlock_irqrestore(glock, flags);
711 CERROR("cmid HCA(%s), kib_dev(%s) need failover\n",
712 cmid->device->name, dev->ibd_ifname);
716 kiblnd_hdev_addref_locked(dev->ibd_hdev);
717 conn->ibc_hdev = dev->ibd_hdev;
719 kiblnd_setup_mtu_locked(cmid);
721 write_unlock_irqrestore(glock, flags);
723 LIBCFS_CPT_ALLOC(conn->ibc_rxs, lnet_cpt_table(), cpt,
724 IBLND_RX_MSGS(conn) * sizeof(struct kib_rx));
725 if (!conn->ibc_rxs) {
726 CERROR("Cannot allocate RX buffers\n");
730 rc = kiblnd_alloc_pages(&conn->ibc_rx_pages, cpt,
731 IBLND_RX_MSG_PAGES(conn));
735 kiblnd_map_rx_descs(conn);
737 cq_attr.cqe = IBLND_CQ_ENTRIES(conn);
738 cq_attr.comp_vector = kiblnd_get_completion_vector(conn, cpt);
739 cq = ib_create_cq(cmid->device,
740 kiblnd_cq_completion, kiblnd_cq_event, conn,
743 CERROR("Failed to create CQ with %d CQEs: %ld\n",
744 IBLND_CQ_ENTRIES(conn), PTR_ERR(cq));
750 rc = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
752 CERROR("Can't request completion notification: %d\n", rc);
756 init_qp_attr->event_handler = kiblnd_qp_event;
757 init_qp_attr->qp_context = conn;
758 init_qp_attr->cap.max_send_wr = IBLND_SEND_WRS(conn);
759 init_qp_attr->cap.max_recv_wr = IBLND_RECV_WRS(conn);
760 init_qp_attr->cap.max_send_sge = 1;
761 init_qp_attr->cap.max_recv_sge = 1;
762 init_qp_attr->sq_sig_type = IB_SIGNAL_REQ_WR;
763 init_qp_attr->qp_type = IB_QPT_RC;
764 init_qp_attr->send_cq = cq;
765 init_qp_attr->recv_cq = cq;
767 conn->ibc_sched = sched;
769 rc = rdma_create_qp(cmid, conn->ibc_hdev->ibh_pd, init_qp_attr);
771 CERROR("Can't create QP: %d, send_wr: %d, recv_wr: %d\n",
772 rc, init_qp_attr->cap.max_send_wr,
773 init_qp_attr->cap.max_recv_wr);
777 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
779 /* 1 ref for caller and each rxmsg */
780 atomic_set(&conn->ibc_refcount, 1 + IBLND_RX_MSGS(conn));
781 conn->ibc_nrx = IBLND_RX_MSGS(conn);
784 for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
785 rc = kiblnd_post_rx(&conn->ibc_rxs[i],
786 IBLND_POSTRX_NO_CREDIT);
788 CERROR("Can't post rxmsg: %d\n", rc);
790 /* Make posted receives complete */
791 kiblnd_abort_receives(conn);
794 * correct # of posted buffers
795 * NB locking needed now I'm racing with completion
797 spin_lock_irqsave(&sched->ibs_lock, flags);
798 conn->ibc_nrx -= IBLND_RX_MSGS(conn) - i;
799 spin_unlock_irqrestore(&sched->ibs_lock, flags);
802 * cmid will be destroyed by CM(ofed) after cm_callback
803 * returned, so we can't refer it anymore
804 * (by kiblnd_connd()->kiblnd_destroy_conn)
806 rdma_destroy_qp(conn->ibc_cmid);
807 conn->ibc_cmid = NULL;
809 /* Drop my own and unused rxbuffer refcounts */
810 while (i++ <= IBLND_RX_MSGS(conn))
811 kiblnd_conn_decref(conn);
817 /* Init successful! */
818 LASSERT(state == IBLND_CONN_ACTIVE_CONNECT ||
819 state == IBLND_CONN_PASSIVE_WAIT);
820 conn->ibc_state = state;
823 atomic_inc(&net->ibn_nconns);
827 kiblnd_destroy_conn(conn);
828 LIBCFS_FREE(conn, sizeof(*conn));
830 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
835 void kiblnd_destroy_conn(struct kib_conn *conn)
837 struct rdma_cm_id *cmid = conn->ibc_cmid;
838 struct kib_peer *peer = conn->ibc_peer;
841 LASSERT(!in_interrupt());
842 LASSERT(!atomic_read(&conn->ibc_refcount));
843 LASSERT(list_empty(&conn->ibc_early_rxs));
844 LASSERT(list_empty(&conn->ibc_tx_noops));
845 LASSERT(list_empty(&conn->ibc_tx_queue));
846 LASSERT(list_empty(&conn->ibc_tx_queue_rsrvd));
847 LASSERT(list_empty(&conn->ibc_tx_queue_nocred));
848 LASSERT(list_empty(&conn->ibc_active_txs));
849 LASSERT(!conn->ibc_noops_posted);
850 LASSERT(!conn->ibc_nsends_posted);
852 switch (conn->ibc_state) {
854 /* conn must be completely disengaged from the network */
857 case IBLND_CONN_DISCONNECTED:
858 /* connvars should have been freed already */
859 LASSERT(!conn->ibc_connvars);
862 case IBLND_CONN_INIT:
866 /* conn->ibc_cmid might be destroyed by CM already */
867 if (cmid && cmid->qp)
868 rdma_destroy_qp(cmid);
871 rc = ib_destroy_cq(conn->ibc_cq);
873 CWARN("Error destroying CQ: %d\n", rc);
876 if (conn->ibc_rx_pages)
877 kiblnd_unmap_rx_descs(conn);
880 LIBCFS_FREE(conn->ibc_rxs,
881 IBLND_RX_MSGS(conn) * sizeof(struct kib_rx));
884 if (conn->ibc_connvars)
885 LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
888 kiblnd_hdev_decref(conn->ibc_hdev);
890 /* See CAVEAT EMPTOR above in kiblnd_create_conn */
891 if (conn->ibc_state != IBLND_CONN_INIT) {
892 struct kib_net *net = peer->ibp_ni->ni_data;
894 kiblnd_peer_decref(peer);
895 rdma_destroy_id(cmid);
896 atomic_dec(&net->ibn_nconns);
900 int kiblnd_close_peer_conns_locked(struct kib_peer *peer, int why)
902 struct kib_conn *conn;
903 struct list_head *ctmp;
904 struct list_head *cnxt;
907 list_for_each_safe(ctmp, cnxt, &peer->ibp_conns) {
908 conn = list_entry(ctmp, struct kib_conn, ibc_list);
910 CDEBUG(D_NET, "Closing conn -> %s, version: %x, reason: %d\n",
911 libcfs_nid2str(peer->ibp_nid),
912 conn->ibc_version, why);
914 kiblnd_close_conn_locked(conn, why);
921 int kiblnd_close_stale_conns_locked(struct kib_peer *peer,
922 int version, __u64 incarnation)
924 struct kib_conn *conn;
925 struct list_head *ctmp;
926 struct list_head *cnxt;
929 list_for_each_safe(ctmp, cnxt, &peer->ibp_conns) {
930 conn = list_entry(ctmp, struct kib_conn, ibc_list);
932 if (conn->ibc_version == version &&
933 conn->ibc_incarnation == incarnation)
937 "Closing stale conn -> %s version: %x, incarnation:%#llx(%x, %#llx)\n",
938 libcfs_nid2str(peer->ibp_nid),
939 conn->ibc_version, conn->ibc_incarnation,
940 version, incarnation);
942 kiblnd_close_conn_locked(conn, -ESTALE);
949 static int kiblnd_close_matching_conns(lnet_ni_t *ni, lnet_nid_t nid)
951 struct kib_peer *peer;
952 struct list_head *ptmp;
953 struct list_head *pnxt;
960 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
962 if (nid != LNET_NID_ANY) {
963 lo = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
964 hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
967 hi = kiblnd_data.kib_peer_hash_size - 1;
970 for (i = lo; i <= hi; i++) {
971 list_for_each_safe(ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
972 peer = list_entry(ptmp, struct kib_peer, ibp_list);
973 LASSERT(!kiblnd_peer_idle(peer));
975 if (peer->ibp_ni != ni)
978 if (!(nid == LNET_NID_ANY || nid == peer->ibp_nid))
981 count += kiblnd_close_peer_conns_locked(peer, 0);
985 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
987 /* wildcards always succeed */
988 if (nid == LNET_NID_ANY)
991 return !count ? -ENOENT : 0;
994 static int kiblnd_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg)
996 struct libcfs_ioctl_data *data = arg;
1000 case IOC_LIBCFS_GET_PEER: {
1004 rc = kiblnd_get_peer_info(ni, data->ioc_count,
1006 data->ioc_nid = nid;
1007 data->ioc_count = count;
1011 case IOC_LIBCFS_DEL_PEER: {
1012 rc = kiblnd_del_peer(ni, data->ioc_nid);
1015 case IOC_LIBCFS_GET_CONN: {
1016 struct kib_conn *conn;
1019 conn = kiblnd_get_conn_by_idx(ni, data->ioc_count);
1025 LASSERT(conn->ibc_cmid);
1026 data->ioc_nid = conn->ibc_peer->ibp_nid;
1027 if (!conn->ibc_cmid->route.path_rec)
1028 data->ioc_u32[0] = 0; /* iWarp has no path MTU */
1031 ib_mtu_enum_to_int(conn->ibc_cmid->route.path_rec->mtu);
1032 kiblnd_conn_decref(conn);
1035 case IOC_LIBCFS_CLOSE_CONNECTION: {
1036 rc = kiblnd_close_matching_conns(ni, data->ioc_nid);
1047 static void kiblnd_query(lnet_ni_t *ni, lnet_nid_t nid, unsigned long *when)
1049 unsigned long last_alive = 0;
1050 unsigned long now = cfs_time_current();
1051 rwlock_t *glock = &kiblnd_data.kib_global_lock;
1052 struct kib_peer *peer;
1053 unsigned long flags;
1055 read_lock_irqsave(glock, flags);
1057 peer = kiblnd_find_peer_locked(nid);
1059 last_alive = peer->ibp_last_alive;
1061 read_unlock_irqrestore(glock, flags);
1067 * peer is not persistent in hash, trigger peer creation
1068 * and connection establishment with a NULL tx
1071 kiblnd_launch_tx(ni, NULL, nid);
1073 CDEBUG(D_NET, "Peer %s %p, alive %ld secs ago\n",
1074 libcfs_nid2str(nid), peer,
1075 last_alive ? cfs_duration_sec(now - last_alive) : -1);
1078 static void kiblnd_free_pages(struct kib_pages *p)
1080 int npages = p->ibp_npages;
1083 for (i = 0; i < npages; i++) {
1084 if (p->ibp_pages[i])
1085 __free_page(p->ibp_pages[i]);
1088 LIBCFS_FREE(p, offsetof(struct kib_pages, ibp_pages[npages]));
1091 int kiblnd_alloc_pages(struct kib_pages **pp, int cpt, int npages)
1093 struct kib_pages *p;
1096 LIBCFS_CPT_ALLOC(p, lnet_cpt_table(), cpt,
1097 offsetof(struct kib_pages, ibp_pages[npages]));
1099 CERROR("Can't allocate descriptor for %d pages\n", npages);
1103 memset(p, 0, offsetof(struct kib_pages, ibp_pages[npages]));
1104 p->ibp_npages = npages;
1106 for (i = 0; i < npages; i++) {
1107 p->ibp_pages[i] = alloc_pages_node(
1108 cfs_cpt_spread_node(lnet_cpt_table(), cpt),
1110 if (!p->ibp_pages[i]) {
1111 CERROR("Can't allocate page %d of %d\n", i, npages);
1112 kiblnd_free_pages(p);
1121 void kiblnd_unmap_rx_descs(struct kib_conn *conn)
1126 LASSERT(conn->ibc_rxs);
1127 LASSERT(conn->ibc_hdev);
1129 for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
1130 rx = &conn->ibc_rxs[i];
1132 LASSERT(rx->rx_nob >= 0); /* not posted */
1134 kiblnd_dma_unmap_single(conn->ibc_hdev->ibh_ibdev,
1135 KIBLND_UNMAP_ADDR(rx, rx_msgunmap,
1137 IBLND_MSG_SIZE, DMA_FROM_DEVICE);
1140 kiblnd_free_pages(conn->ibc_rx_pages);
1142 conn->ibc_rx_pages = NULL;
1145 void kiblnd_map_rx_descs(struct kib_conn *conn)
1153 for (pg_off = ipg = i = 0; i < IBLND_RX_MSGS(conn); i++) {
1154 pg = conn->ibc_rx_pages->ibp_pages[ipg];
1155 rx = &conn->ibc_rxs[i];
1158 rx->rx_msg = (struct kib_msg *)(((char *)page_address(pg)) + pg_off);
1160 rx->rx_msgaddr = kiblnd_dma_map_single(conn->ibc_hdev->ibh_ibdev,
1164 LASSERT(!kiblnd_dma_mapping_error(conn->ibc_hdev->ibh_ibdev,
1166 KIBLND_UNMAP_ADDR_SET(rx, rx_msgunmap, rx->rx_msgaddr);
1168 CDEBUG(D_NET, "rx %d: %p %#llx(%#llx)\n",
1169 i, rx->rx_msg, rx->rx_msgaddr,
1170 (__u64)(page_to_phys(pg) + pg_off));
1172 pg_off += IBLND_MSG_SIZE;
1173 LASSERT(pg_off <= PAGE_SIZE);
1175 if (pg_off == PAGE_SIZE) {
1178 LASSERT(ipg <= IBLND_RX_MSG_PAGES(conn));
1183 static void kiblnd_unmap_tx_pool(struct kib_tx_pool *tpo)
1185 struct kib_hca_dev *hdev = tpo->tpo_hdev;
1189 LASSERT(!tpo->tpo_pool.po_allocated);
1194 for (i = 0; i < tpo->tpo_pool.po_size; i++) {
1195 tx = &tpo->tpo_tx_descs[i];
1196 kiblnd_dma_unmap_single(hdev->ibh_ibdev,
1197 KIBLND_UNMAP_ADDR(tx, tx_msgunmap,
1199 IBLND_MSG_SIZE, DMA_TO_DEVICE);
1202 kiblnd_hdev_decref(hdev);
1203 tpo->tpo_hdev = NULL;
1206 static struct kib_hca_dev *kiblnd_current_hdev(struct kib_dev *dev)
1208 struct kib_hca_dev *hdev;
1209 unsigned long flags;
1212 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1213 while (dev->ibd_failover) {
1214 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1216 CDEBUG(D_NET, "%s: Wait for failover\n",
1218 set_current_state(TASK_INTERRUPTIBLE);
1219 schedule_timeout(cfs_time_seconds(1) / 100);
1221 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1224 kiblnd_hdev_addref_locked(dev->ibd_hdev);
1225 hdev = dev->ibd_hdev;
1227 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1232 static void kiblnd_map_tx_pool(struct kib_tx_pool *tpo)
1234 struct kib_pages *txpgs = tpo->tpo_tx_pages;
1235 struct kib_pool *pool = &tpo->tpo_pool;
1236 struct kib_net *net = pool->po_owner->ps_net;
1237 struct kib_dev *dev;
1248 /* pre-mapped messages are not bigger than 1 page */
1249 CLASSERT(IBLND_MSG_SIZE <= PAGE_SIZE);
1251 /* No fancy arithmetic when we do the buffer calculations */
1252 CLASSERT(!(PAGE_SIZE % IBLND_MSG_SIZE));
1254 tpo->tpo_hdev = kiblnd_current_hdev(dev);
1256 for (ipage = page_offset = i = 0; i < pool->po_size; i++) {
1257 page = txpgs->ibp_pages[ipage];
1258 tx = &tpo->tpo_tx_descs[i];
1260 tx->tx_msg = (struct kib_msg *)(((char *)page_address(page)) +
1263 tx->tx_msgaddr = kiblnd_dma_map_single(
1264 tpo->tpo_hdev->ibh_ibdev, tx->tx_msg,
1265 IBLND_MSG_SIZE, DMA_TO_DEVICE);
1266 LASSERT(!kiblnd_dma_mapping_error(tpo->tpo_hdev->ibh_ibdev,
1268 KIBLND_UNMAP_ADDR_SET(tx, tx_msgunmap, tx->tx_msgaddr);
1270 list_add(&tx->tx_list, &pool->po_free_list);
1272 page_offset += IBLND_MSG_SIZE;
1273 LASSERT(page_offset <= PAGE_SIZE);
1275 if (page_offset == PAGE_SIZE) {
1278 LASSERT(ipage <= txpgs->ibp_npages);
1283 struct ib_mr *kiblnd_find_rd_dma_mr(struct lnet_ni *ni, struct kib_rdma_desc *rd,
1284 int negotiated_nfrags)
1286 struct kib_net *net = ni->ni_data;
1287 struct kib_hca_dev *hdev = net->ibn_dev->ibd_hdev;
1288 struct lnet_ioctl_config_o2iblnd_tunables *tunables;
1292 tunables = &ni->ni_lnd_tunables->lt_tun_u.lt_o2ib;
1293 mod = tunables->lnd_map_on_demand;
1294 nfrags = (negotiated_nfrags != -1) ? negotiated_nfrags : mod;
1296 LASSERT(hdev->ibh_mrs);
1298 if (mod > 0 && nfrags <= rd->rd_nfrags)
1301 return hdev->ibh_mrs;
1304 static void kiblnd_destroy_fmr_pool(struct kib_fmr_pool *fpo)
1306 LASSERT(!fpo->fpo_map_count);
1308 if (fpo->fpo_is_fmr) {
1309 if (fpo->fmr.fpo_fmr_pool)
1310 ib_destroy_fmr_pool(fpo->fmr.fpo_fmr_pool);
1312 struct kib_fast_reg_descriptor *frd, *tmp;
1315 list_for_each_entry_safe(frd, tmp, &fpo->fast_reg.fpo_pool_list,
1317 list_del(&frd->frd_list);
1318 ib_dereg_mr(frd->frd_mr);
1319 LIBCFS_FREE(frd, sizeof(*frd));
1322 if (i < fpo->fast_reg.fpo_pool_size)
1323 CERROR("FastReg pool still has %d regions registered\n",
1324 fpo->fast_reg.fpo_pool_size - i);
1328 kiblnd_hdev_decref(fpo->fpo_hdev);
1330 LIBCFS_FREE(fpo, sizeof(*fpo));
1333 static void kiblnd_destroy_fmr_pool_list(struct list_head *head)
1335 struct kib_fmr_pool *fpo, *tmp;
1337 list_for_each_entry_safe(fpo, tmp, head, fpo_list) {
1338 list_del(&fpo->fpo_list);
1339 kiblnd_destroy_fmr_pool(fpo);
1344 kiblnd_fmr_pool_size(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
1347 int size = tunables->lnd_fmr_pool_size / ncpts;
1349 return max(IBLND_FMR_POOL, size);
1353 kiblnd_fmr_flush_trigger(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
1356 int size = tunables->lnd_fmr_flush_trigger / ncpts;
1358 return max(IBLND_FMR_POOL_FLUSH, size);
1361 static int kiblnd_alloc_fmr_pool(struct kib_fmr_poolset *fps, struct kib_fmr_pool *fpo)
1363 struct ib_fmr_pool_param param = {
1364 .max_pages_per_fmr = LNET_MAX_PAYLOAD / PAGE_SIZE,
1365 .page_shift = PAGE_SHIFT,
1366 .access = (IB_ACCESS_LOCAL_WRITE |
1367 IB_ACCESS_REMOTE_WRITE),
1368 .pool_size = fps->fps_pool_size,
1369 .dirty_watermark = fps->fps_flush_trigger,
1370 .flush_function = NULL,
1372 .cache = !!fps->fps_cache };
1375 fpo->fmr.fpo_fmr_pool = ib_create_fmr_pool(fpo->fpo_hdev->ibh_pd,
1377 if (IS_ERR(fpo->fmr.fpo_fmr_pool)) {
1378 rc = PTR_ERR(fpo->fmr.fpo_fmr_pool);
1380 CERROR("Failed to create FMR pool: %d\n", rc);
1382 CERROR("FMRs are not supported\n");
1388 static int kiblnd_alloc_freg_pool(struct kib_fmr_poolset *fps, struct kib_fmr_pool *fpo)
1390 struct kib_fast_reg_descriptor *frd, *tmp;
1393 INIT_LIST_HEAD(&fpo->fast_reg.fpo_pool_list);
1394 fpo->fast_reg.fpo_pool_size = 0;
1395 for (i = 0; i < fps->fps_pool_size; i++) {
1396 LIBCFS_CPT_ALLOC(frd, lnet_cpt_table(), fps->fps_cpt,
1399 CERROR("Failed to allocate a new fast_reg descriptor\n");
1404 frd->frd_mr = ib_alloc_mr(fpo->fpo_hdev->ibh_pd,
1406 LNET_MAX_PAYLOAD / PAGE_SIZE);
1407 if (IS_ERR(frd->frd_mr)) {
1408 rc = PTR_ERR(frd->frd_mr);
1409 CERROR("Failed to allocate ib_alloc_mr: %d\n", rc);
1414 frd->frd_valid = true;
1416 list_add_tail(&frd->frd_list, &fpo->fast_reg.fpo_pool_list);
1417 fpo->fast_reg.fpo_pool_size++;
1424 ib_dereg_mr(frd->frd_mr);
1425 LIBCFS_FREE(frd, sizeof(*frd));
1428 list_for_each_entry_safe(frd, tmp, &fpo->fast_reg.fpo_pool_list,
1430 list_del(&frd->frd_list);
1431 ib_dereg_mr(frd->frd_mr);
1432 LIBCFS_FREE(frd, sizeof(*frd));
1438 static int kiblnd_create_fmr_pool(struct kib_fmr_poolset *fps,
1439 struct kib_fmr_pool **pp_fpo)
1441 struct kib_dev *dev = fps->fps_net->ibn_dev;
1442 struct ib_device_attr *dev_attr;
1443 struct kib_fmr_pool *fpo;
1446 LIBCFS_CPT_ALLOC(fpo, lnet_cpt_table(), fps->fps_cpt, sizeof(*fpo));
1450 fpo->fpo_hdev = kiblnd_current_hdev(dev);
1451 dev_attr = &fpo->fpo_hdev->ibh_ibdev->attrs;
1453 /* Check for FMR or FastReg support */
1454 fpo->fpo_is_fmr = 0;
1455 if (fpo->fpo_hdev->ibh_ibdev->alloc_fmr &&
1456 fpo->fpo_hdev->ibh_ibdev->dealloc_fmr &&
1457 fpo->fpo_hdev->ibh_ibdev->map_phys_fmr &&
1458 fpo->fpo_hdev->ibh_ibdev->unmap_fmr) {
1459 LCONSOLE_INFO("Using FMR for registration\n");
1460 fpo->fpo_is_fmr = 1;
1461 } else if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) {
1462 LCONSOLE_INFO("Using FastReg for registration\n");
1465 LCONSOLE_ERROR_MSG(rc, "IB device does not support FMRs nor FastRegs, can't register memory\n");
1469 if (fpo->fpo_is_fmr)
1470 rc = kiblnd_alloc_fmr_pool(fps, fpo);
1472 rc = kiblnd_alloc_freg_pool(fps, fpo);
1476 fpo->fpo_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1477 fpo->fpo_owner = fps;
1483 kiblnd_hdev_decref(fpo->fpo_hdev);
1484 LIBCFS_FREE(fpo, sizeof(*fpo));
1488 static void kiblnd_fail_fmr_poolset(struct kib_fmr_poolset *fps,
1489 struct list_head *zombies)
1491 if (!fps->fps_net) /* intialized? */
1494 spin_lock(&fps->fps_lock);
1496 while (!list_empty(&fps->fps_pool_list)) {
1497 struct kib_fmr_pool *fpo = list_entry(fps->fps_pool_list.next,
1498 struct kib_fmr_pool, fpo_list);
1499 fpo->fpo_failed = 1;
1500 list_del(&fpo->fpo_list);
1501 if (!fpo->fpo_map_count)
1502 list_add(&fpo->fpo_list, zombies);
1504 list_add(&fpo->fpo_list, &fps->fps_failed_pool_list);
1507 spin_unlock(&fps->fps_lock);
1510 static void kiblnd_fini_fmr_poolset(struct kib_fmr_poolset *fps)
1512 if (fps->fps_net) { /* initialized? */
1513 kiblnd_destroy_fmr_pool_list(&fps->fps_failed_pool_list);
1514 kiblnd_destroy_fmr_pool_list(&fps->fps_pool_list);
1519 kiblnd_init_fmr_poolset(struct kib_fmr_poolset *fps, int cpt, int ncpts,
1520 struct kib_net *net,
1521 struct lnet_ioctl_config_o2iblnd_tunables *tunables)
1523 struct kib_fmr_pool *fpo;
1526 memset(fps, 0, sizeof(*fps));
1531 fps->fps_pool_size = kiblnd_fmr_pool_size(tunables, ncpts);
1532 fps->fps_flush_trigger = kiblnd_fmr_flush_trigger(tunables, ncpts);
1533 fps->fps_cache = tunables->lnd_fmr_cache;
1535 spin_lock_init(&fps->fps_lock);
1536 INIT_LIST_HEAD(&fps->fps_pool_list);
1537 INIT_LIST_HEAD(&fps->fps_failed_pool_list);
1539 rc = kiblnd_create_fmr_pool(fps, &fpo);
1541 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1546 static int kiblnd_fmr_pool_is_idle(struct kib_fmr_pool *fpo, unsigned long now)
1548 if (fpo->fpo_map_count) /* still in use */
1550 if (fpo->fpo_failed)
1552 return cfs_time_aftereq(now, fpo->fpo_deadline);
1556 kiblnd_map_tx_pages(struct kib_tx *tx, struct kib_rdma_desc *rd)
1558 __u64 *pages = tx->tx_pages;
1559 struct kib_hca_dev *hdev;
1564 hdev = tx->tx_pool->tpo_hdev;
1566 for (i = 0, npages = 0; i < rd->rd_nfrags; i++) {
1567 for (size = 0; size < rd->rd_frags[i].rf_nob;
1568 size += hdev->ibh_page_size) {
1569 pages[npages++] = (rd->rd_frags[i].rf_addr &
1570 hdev->ibh_page_mask) + size;
1577 void kiblnd_fmr_pool_unmap(struct kib_fmr *fmr, int status)
1580 struct kib_fmr_pool *fpo = fmr->fmr_pool;
1581 struct kib_fmr_poolset *fps;
1582 unsigned long now = cfs_time_current();
1583 struct kib_fmr_pool *tmp;
1589 fps = fpo->fpo_owner;
1590 if (fpo->fpo_is_fmr) {
1591 if (fmr->fmr_pfmr) {
1592 rc = ib_fmr_pool_unmap(fmr->fmr_pfmr);
1594 fmr->fmr_pfmr = NULL;
1598 rc = ib_flush_fmr_pool(fpo->fmr.fpo_fmr_pool);
1602 struct kib_fast_reg_descriptor *frd = fmr->fmr_frd;
1605 frd->frd_valid = false;
1606 spin_lock(&fps->fps_lock);
1607 list_add_tail(&frd->frd_list, &fpo->fast_reg.fpo_pool_list);
1608 spin_unlock(&fps->fps_lock);
1609 fmr->fmr_frd = NULL;
1612 fmr->fmr_pool = NULL;
1614 spin_lock(&fps->fps_lock);
1615 fpo->fpo_map_count--; /* decref the pool */
1617 list_for_each_entry_safe(fpo, tmp, &fps->fps_pool_list, fpo_list) {
1618 /* the first pool is persistent */
1619 if (fps->fps_pool_list.next == &fpo->fpo_list)
1622 if (kiblnd_fmr_pool_is_idle(fpo, now)) {
1623 list_move(&fpo->fpo_list, &zombies);
1627 spin_unlock(&fps->fps_lock);
1629 if (!list_empty(&zombies))
1630 kiblnd_destroy_fmr_pool_list(&zombies);
1633 int kiblnd_fmr_pool_map(struct kib_fmr_poolset *fps, struct kib_tx *tx,
1634 struct kib_rdma_desc *rd, __u32 nob, __u64 iov,
1635 struct kib_fmr *fmr)
1637 __u64 *pages = tx->tx_pages;
1638 bool is_rx = (rd != tx->tx_rd);
1639 bool tx_pages_mapped = 0;
1640 struct kib_fmr_pool *fpo;
1646 spin_lock(&fps->fps_lock);
1647 version = fps->fps_version;
1648 list_for_each_entry(fpo, &fps->fps_pool_list, fpo_list) {
1649 fpo->fpo_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1650 fpo->fpo_map_count++;
1652 if (fpo->fpo_is_fmr) {
1653 struct ib_pool_fmr *pfmr;
1655 spin_unlock(&fps->fps_lock);
1657 if (!tx_pages_mapped) {
1658 npages = kiblnd_map_tx_pages(tx, rd);
1659 tx_pages_mapped = 1;
1662 pfmr = ib_fmr_pool_map_phys(fpo->fmr.fpo_fmr_pool,
1663 pages, npages, iov);
1664 if (likely(!IS_ERR(pfmr))) {
1665 fmr->fmr_key = is_rx ? pfmr->fmr->rkey :
1667 fmr->fmr_frd = NULL;
1668 fmr->fmr_pfmr = pfmr;
1669 fmr->fmr_pool = fpo;
1674 if (!list_empty(&fpo->fast_reg.fpo_pool_list)) {
1675 struct kib_fast_reg_descriptor *frd;
1676 struct ib_reg_wr *wr;
1680 frd = list_first_entry(&fpo->fast_reg.fpo_pool_list,
1681 struct kib_fast_reg_descriptor,
1683 list_del(&frd->frd_list);
1684 spin_unlock(&fps->fps_lock);
1688 if (!frd->frd_valid) {
1689 __u32 key = is_rx ? mr->rkey : mr->lkey;
1690 struct ib_send_wr *inv_wr;
1692 inv_wr = &frd->frd_inv_wr;
1693 memset(inv_wr, 0, sizeof(*inv_wr));
1694 inv_wr->opcode = IB_WR_LOCAL_INV;
1695 inv_wr->wr_id = IBLND_WID_MR;
1696 inv_wr->ex.invalidate_rkey = key;
1699 key = ib_inc_rkey(key);
1700 ib_update_fast_reg_key(mr, key);
1703 n = ib_map_mr_sg(mr, tx->tx_frags,
1704 tx->tx_nfrags, NULL, PAGE_SIZE);
1705 if (unlikely(n != tx->tx_nfrags)) {
1706 CERROR("Failed to map mr %d/%d elements\n",
1708 return n < 0 ? n : -EINVAL;
1713 /* Prepare FastReg WR */
1714 wr = &frd->frd_fastreg_wr;
1715 memset(wr, 0, sizeof(*wr));
1716 wr->wr.opcode = IB_WR_REG_MR;
1717 wr->wr.wr_id = IBLND_WID_MR;
1719 wr->wr.send_flags = 0;
1721 wr->key = is_rx ? mr->rkey : mr->lkey;
1722 wr->access = (IB_ACCESS_LOCAL_WRITE |
1723 IB_ACCESS_REMOTE_WRITE);
1725 fmr->fmr_key = is_rx ? mr->rkey : mr->lkey;
1727 fmr->fmr_pfmr = NULL;
1728 fmr->fmr_pool = fpo;
1731 spin_unlock(&fps->fps_lock);
1735 spin_lock(&fps->fps_lock);
1736 fpo->fpo_map_count--;
1737 if (rc != -EAGAIN) {
1738 spin_unlock(&fps->fps_lock);
1742 /* EAGAIN and ... */
1743 if (version != fps->fps_version) {
1744 spin_unlock(&fps->fps_lock);
1749 if (fps->fps_increasing) {
1750 spin_unlock(&fps->fps_lock);
1751 CDEBUG(D_NET, "Another thread is allocating new FMR pool, waiting for her to complete\n");
1756 if (time_before(cfs_time_current(), fps->fps_next_retry)) {
1757 /* someone failed recently */
1758 spin_unlock(&fps->fps_lock);
1762 fps->fps_increasing = 1;
1763 spin_unlock(&fps->fps_lock);
1765 CDEBUG(D_NET, "Allocate new FMR pool\n");
1766 rc = kiblnd_create_fmr_pool(fps, &fpo);
1767 spin_lock(&fps->fps_lock);
1768 fps->fps_increasing = 0;
1771 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1773 fps->fps_next_retry = cfs_time_shift(IBLND_POOL_RETRY);
1775 spin_unlock(&fps->fps_lock);
1780 static void kiblnd_fini_pool(struct kib_pool *pool)
1782 LASSERT(list_empty(&pool->po_free_list));
1783 LASSERT(!pool->po_allocated);
1785 CDEBUG(D_NET, "Finalize %s pool\n", pool->po_owner->ps_name);
1788 static void kiblnd_init_pool(struct kib_poolset *ps, struct kib_pool *pool, int size)
1790 CDEBUG(D_NET, "Initialize %s pool\n", ps->ps_name);
1792 memset(pool, 0, sizeof(*pool));
1793 INIT_LIST_HEAD(&pool->po_free_list);
1794 pool->po_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1795 pool->po_owner = ps;
1796 pool->po_size = size;
1799 static void kiblnd_destroy_pool_list(struct list_head *head)
1801 struct kib_pool *pool;
1803 while (!list_empty(head)) {
1804 pool = list_entry(head->next, struct kib_pool, po_list);
1805 list_del(&pool->po_list);
1807 LASSERT(pool->po_owner);
1808 pool->po_owner->ps_pool_destroy(pool);
1812 static void kiblnd_fail_poolset(struct kib_poolset *ps, struct list_head *zombies)
1814 if (!ps->ps_net) /* intialized? */
1817 spin_lock(&ps->ps_lock);
1818 while (!list_empty(&ps->ps_pool_list)) {
1819 struct kib_pool *po = list_entry(ps->ps_pool_list.next,
1820 struct kib_pool, po_list);
1822 list_del(&po->po_list);
1823 if (!po->po_allocated)
1824 list_add(&po->po_list, zombies);
1826 list_add(&po->po_list, &ps->ps_failed_pool_list);
1828 spin_unlock(&ps->ps_lock);
1831 static void kiblnd_fini_poolset(struct kib_poolset *ps)
1833 if (ps->ps_net) { /* initialized? */
1834 kiblnd_destroy_pool_list(&ps->ps_failed_pool_list);
1835 kiblnd_destroy_pool_list(&ps->ps_pool_list);
1839 static int kiblnd_init_poolset(struct kib_poolset *ps, int cpt,
1840 struct kib_net *net, char *name, int size,
1841 kib_ps_pool_create_t po_create,
1842 kib_ps_pool_destroy_t po_destroy,
1843 kib_ps_node_init_t nd_init,
1844 kib_ps_node_fini_t nd_fini)
1846 struct kib_pool *pool;
1849 memset(ps, 0, sizeof(*ps));
1853 ps->ps_pool_create = po_create;
1854 ps->ps_pool_destroy = po_destroy;
1855 ps->ps_node_init = nd_init;
1856 ps->ps_node_fini = nd_fini;
1857 ps->ps_pool_size = size;
1858 if (strlcpy(ps->ps_name, name, sizeof(ps->ps_name))
1859 >= sizeof(ps->ps_name))
1861 spin_lock_init(&ps->ps_lock);
1862 INIT_LIST_HEAD(&ps->ps_pool_list);
1863 INIT_LIST_HEAD(&ps->ps_failed_pool_list);
1865 rc = ps->ps_pool_create(ps, size, &pool);
1867 list_add(&pool->po_list, &ps->ps_pool_list);
1869 CERROR("Failed to create the first pool for %s\n", ps->ps_name);
1874 static int kiblnd_pool_is_idle(struct kib_pool *pool, unsigned long now)
1876 if (pool->po_allocated) /* still in use */
1878 if (pool->po_failed)
1880 return cfs_time_aftereq(now, pool->po_deadline);
1883 void kiblnd_pool_free_node(struct kib_pool *pool, struct list_head *node)
1886 struct kib_poolset *ps = pool->po_owner;
1887 struct kib_pool *tmp;
1888 unsigned long now = cfs_time_current();
1890 spin_lock(&ps->ps_lock);
1892 if (ps->ps_node_fini)
1893 ps->ps_node_fini(pool, node);
1895 LASSERT(pool->po_allocated > 0);
1896 list_add(node, &pool->po_free_list);
1897 pool->po_allocated--;
1899 list_for_each_entry_safe(pool, tmp, &ps->ps_pool_list, po_list) {
1900 /* the first pool is persistent */
1901 if (ps->ps_pool_list.next == &pool->po_list)
1904 if (kiblnd_pool_is_idle(pool, now))
1905 list_move(&pool->po_list, &zombies);
1907 spin_unlock(&ps->ps_lock);
1909 if (!list_empty(&zombies))
1910 kiblnd_destroy_pool_list(&zombies);
1913 struct list_head *kiblnd_pool_alloc_node(struct kib_poolset *ps)
1915 struct list_head *node;
1916 struct kib_pool *pool;
1917 unsigned int interval = 1;
1918 unsigned long time_before;
1919 unsigned int trips = 0;
1923 spin_lock(&ps->ps_lock);
1924 list_for_each_entry(pool, &ps->ps_pool_list, po_list) {
1925 if (list_empty(&pool->po_free_list))
1928 pool->po_allocated++;
1929 pool->po_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1930 node = pool->po_free_list.next;
1933 if (ps->ps_node_init) {
1934 /* still hold the lock */
1935 ps->ps_node_init(pool, node);
1937 spin_unlock(&ps->ps_lock);
1941 /* no available tx pool and ... */
1942 if (ps->ps_increasing) {
1943 /* another thread is allocating a new pool */
1944 spin_unlock(&ps->ps_lock);
1946 CDEBUG(D_NET, "Another thread is allocating new %s pool, waiting %d HZs for her to complete. trips = %d\n",
1947 ps->ps_name, interval, trips);
1949 set_current_state(TASK_INTERRUPTIBLE);
1950 schedule_timeout(interval);
1951 if (interval < cfs_time_seconds(1))
1957 if (time_before(cfs_time_current(), ps->ps_next_retry)) {
1958 /* someone failed recently */
1959 spin_unlock(&ps->ps_lock);
1963 ps->ps_increasing = 1;
1964 spin_unlock(&ps->ps_lock);
1966 CDEBUG(D_NET, "%s pool exhausted, allocate new pool\n", ps->ps_name);
1967 time_before = cfs_time_current();
1968 rc = ps->ps_pool_create(ps, ps->ps_pool_size, &pool);
1969 CDEBUG(D_NET, "ps_pool_create took %lu HZ to complete",
1970 cfs_time_current() - time_before);
1972 spin_lock(&ps->ps_lock);
1973 ps->ps_increasing = 0;
1975 list_add_tail(&pool->po_list, &ps->ps_pool_list);
1977 ps->ps_next_retry = cfs_time_shift(IBLND_POOL_RETRY);
1978 CERROR("Can't allocate new %s pool because out of memory\n",
1981 spin_unlock(&ps->ps_lock);
1986 static void kiblnd_destroy_tx_pool(struct kib_pool *pool)
1988 struct kib_tx_pool *tpo = container_of(pool, struct kib_tx_pool, tpo_pool);
1991 LASSERT(!pool->po_allocated);
1993 if (tpo->tpo_tx_pages) {
1994 kiblnd_unmap_tx_pool(tpo);
1995 kiblnd_free_pages(tpo->tpo_tx_pages);
1998 if (!tpo->tpo_tx_descs)
2001 for (i = 0; i < pool->po_size; i++) {
2002 struct kib_tx *tx = &tpo->tpo_tx_descs[i];
2004 list_del(&tx->tx_list);
2006 LIBCFS_FREE(tx->tx_pages,
2008 sizeof(*tx->tx_pages));
2010 LIBCFS_FREE(tx->tx_frags,
2011 (1 + IBLND_MAX_RDMA_FRAGS) *
2012 sizeof(*tx->tx_frags));
2014 LIBCFS_FREE(tx->tx_wrq,
2015 (1 + IBLND_MAX_RDMA_FRAGS) *
2016 sizeof(*tx->tx_wrq));
2018 LIBCFS_FREE(tx->tx_sge,
2019 (1 + IBLND_MAX_RDMA_FRAGS) *
2020 sizeof(*tx->tx_sge));
2022 LIBCFS_FREE(tx->tx_rd,
2023 offsetof(struct kib_rdma_desc,
2024 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2027 LIBCFS_FREE(tpo->tpo_tx_descs,
2028 pool->po_size * sizeof(struct kib_tx));
2030 kiblnd_fini_pool(pool);
2031 LIBCFS_FREE(tpo, sizeof(*tpo));
2034 static int kiblnd_tx_pool_size(int ncpts)
2036 int ntx = *kiblnd_tunables.kib_ntx / ncpts;
2038 return max(IBLND_TX_POOL, ntx);
2041 static int kiblnd_create_tx_pool(struct kib_poolset *ps, int size,
2042 struct kib_pool **pp_po)
2046 struct kib_pool *pool;
2047 struct kib_tx_pool *tpo;
2049 LIBCFS_CPT_ALLOC(tpo, lnet_cpt_table(), ps->ps_cpt, sizeof(*tpo));
2051 CERROR("Failed to allocate TX pool\n");
2055 pool = &tpo->tpo_pool;
2056 kiblnd_init_pool(ps, pool, size);
2057 tpo->tpo_tx_descs = NULL;
2058 tpo->tpo_tx_pages = NULL;
2060 npg = (size * IBLND_MSG_SIZE + PAGE_SIZE - 1) / PAGE_SIZE;
2061 if (kiblnd_alloc_pages(&tpo->tpo_tx_pages, ps->ps_cpt, npg)) {
2062 CERROR("Can't allocate tx pages: %d\n", npg);
2063 LIBCFS_FREE(tpo, sizeof(*tpo));
2067 LIBCFS_CPT_ALLOC(tpo->tpo_tx_descs, lnet_cpt_table(), ps->ps_cpt,
2068 size * sizeof(struct kib_tx));
2069 if (!tpo->tpo_tx_descs) {
2070 CERROR("Can't allocate %d tx descriptors\n", size);
2071 ps->ps_pool_destroy(pool);
2075 memset(tpo->tpo_tx_descs, 0, size * sizeof(struct kib_tx));
2077 for (i = 0; i < size; i++) {
2078 struct kib_tx *tx = &tpo->tpo_tx_descs[i];
2081 if (ps->ps_net->ibn_fmr_ps) {
2082 LIBCFS_CPT_ALLOC(tx->tx_pages,
2083 lnet_cpt_table(), ps->ps_cpt,
2084 LNET_MAX_IOV * sizeof(*tx->tx_pages));
2089 LIBCFS_CPT_ALLOC(tx->tx_frags, lnet_cpt_table(), ps->ps_cpt,
2090 (1 + IBLND_MAX_RDMA_FRAGS) *
2091 sizeof(*tx->tx_frags));
2095 sg_init_table(tx->tx_frags, IBLND_MAX_RDMA_FRAGS + 1);
2097 LIBCFS_CPT_ALLOC(tx->tx_wrq, lnet_cpt_table(), ps->ps_cpt,
2098 (1 + IBLND_MAX_RDMA_FRAGS) *
2099 sizeof(*tx->tx_wrq));
2103 LIBCFS_CPT_ALLOC(tx->tx_sge, lnet_cpt_table(), ps->ps_cpt,
2104 (1 + IBLND_MAX_RDMA_FRAGS) *
2105 sizeof(*tx->tx_sge));
2109 LIBCFS_CPT_ALLOC(tx->tx_rd, lnet_cpt_table(), ps->ps_cpt,
2110 offsetof(struct kib_rdma_desc,
2111 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2117 kiblnd_map_tx_pool(tpo);
2122 ps->ps_pool_destroy(pool);
2126 static void kiblnd_tx_init(struct kib_pool *pool, struct list_head *node)
2128 struct kib_tx_poolset *tps = container_of(pool->po_owner,
2129 struct kib_tx_poolset,
2131 struct kib_tx *tx = list_entry(node, struct kib_tx, tx_list);
2133 tx->tx_cookie = tps->tps_next_tx_cookie++;
2136 static void kiblnd_net_fini_pools(struct kib_net *net)
2140 cfs_cpt_for_each(i, lnet_cpt_table()) {
2141 struct kib_tx_poolset *tps;
2142 struct kib_fmr_poolset *fps;
2144 if (net->ibn_tx_ps) {
2145 tps = net->ibn_tx_ps[i];
2146 kiblnd_fini_poolset(&tps->tps_poolset);
2149 if (net->ibn_fmr_ps) {
2150 fps = net->ibn_fmr_ps[i];
2151 kiblnd_fini_fmr_poolset(fps);
2155 if (net->ibn_tx_ps) {
2156 cfs_percpt_free(net->ibn_tx_ps);
2157 net->ibn_tx_ps = NULL;
2160 if (net->ibn_fmr_ps) {
2161 cfs_percpt_free(net->ibn_fmr_ps);
2162 net->ibn_fmr_ps = NULL;
2166 static int kiblnd_net_init_pools(struct kib_net *net, lnet_ni_t *ni, __u32 *cpts,
2169 struct lnet_ioctl_config_o2iblnd_tunables *tunables;
2170 unsigned long flags;
2175 tunables = &ni->ni_lnd_tunables->lt_tun_u.lt_o2ib;
2177 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2178 if (!tunables->lnd_map_on_demand) {
2179 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2180 goto create_tx_pool;
2183 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2185 if (tunables->lnd_fmr_pool_size < *kiblnd_tunables.kib_ntx / 4) {
2186 CERROR("Can't set fmr pool size (%d) < ntx / 4(%d)\n",
2187 tunables->lnd_fmr_pool_size,
2188 *kiblnd_tunables.kib_ntx / 4);
2194 * TX pool must be created later than FMR, see LU-2268
2197 LASSERT(!net->ibn_tx_ps);
2200 * premapping can fail if ibd_nmr > 1, so we always create
2201 * FMR pool and map-on-demand if premapping failed
2203 * cfs_precpt_alloc is creating an array of struct kib_fmr_poolset
2204 * The number of struct kib_fmr_poolsets create is equal to the
2205 * number of CPTs that exist, i.e net->ibn_fmr_ps[cpt].
2207 net->ibn_fmr_ps = cfs_percpt_alloc(lnet_cpt_table(),
2208 sizeof(struct kib_fmr_poolset));
2209 if (!net->ibn_fmr_ps) {
2210 CERROR("Failed to allocate FMR pool array\n");
2215 for (i = 0; i < ncpts; i++) {
2216 cpt = !cpts ? i : cpts[i];
2217 rc = kiblnd_init_fmr_poolset(net->ibn_fmr_ps[cpt], cpt, ncpts,
2220 CERROR("Can't initialize FMR pool for CPT %d: %d\n",
2227 LASSERT(i == ncpts);
2231 * cfs_precpt_alloc is creating an array of struct kib_tx_poolset
2232 * The number of struct kib_tx_poolsets create is equal to the
2233 * number of CPTs that exist, i.e net->ibn_tx_ps[cpt].
2235 net->ibn_tx_ps = cfs_percpt_alloc(lnet_cpt_table(),
2236 sizeof(struct kib_tx_poolset));
2237 if (!net->ibn_tx_ps) {
2238 CERROR("Failed to allocate tx pool array\n");
2243 for (i = 0; i < ncpts; i++) {
2244 cpt = !cpts ? i : cpts[i];
2245 rc = kiblnd_init_poolset(&net->ibn_tx_ps[cpt]->tps_poolset,
2247 kiblnd_tx_pool_size(ncpts),
2248 kiblnd_create_tx_pool,
2249 kiblnd_destroy_tx_pool,
2250 kiblnd_tx_init, NULL);
2252 CERROR("Can't initialize TX pool for CPT %d: %d\n",
2260 kiblnd_net_fini_pools(net);
2265 static int kiblnd_hdev_get_attr(struct kib_hca_dev *hdev)
2268 * It's safe to assume a HCA can handle a page size
2269 * matching that of the native system
2271 hdev->ibh_page_shift = PAGE_SHIFT;
2272 hdev->ibh_page_size = 1 << PAGE_SHIFT;
2273 hdev->ibh_page_mask = ~((__u64)hdev->ibh_page_size - 1);
2275 hdev->ibh_mr_size = hdev->ibh_ibdev->attrs.max_mr_size;
2276 if (hdev->ibh_mr_size == ~0ULL) {
2277 hdev->ibh_mr_shift = 64;
2281 CERROR("Invalid mr size: %#llx\n", hdev->ibh_mr_size);
2285 static void kiblnd_hdev_cleanup_mrs(struct kib_hca_dev *hdev)
2290 ib_dereg_mr(hdev->ibh_mrs);
2292 hdev->ibh_mrs = NULL;
2295 void kiblnd_hdev_destroy(struct kib_hca_dev *hdev)
2297 kiblnd_hdev_cleanup_mrs(hdev);
2300 ib_dealloc_pd(hdev->ibh_pd);
2303 rdma_destroy_id(hdev->ibh_cmid);
2305 LIBCFS_FREE(hdev, sizeof(*hdev));
2308 static int kiblnd_hdev_setup_mrs(struct kib_hca_dev *hdev)
2312 int acflags = IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE;
2314 rc = kiblnd_hdev_get_attr(hdev);
2318 mr = ib_get_dma_mr(hdev->ibh_pd, acflags);
2320 CERROR("Failed ib_get_dma_mr : %ld\n", PTR_ERR(mr));
2321 kiblnd_hdev_cleanup_mrs(hdev);
2331 static int kiblnd_dummy_callback(struct rdma_cm_id *cmid,
2332 struct rdma_cm_event *event)
2337 static int kiblnd_dev_need_failover(struct kib_dev *dev)
2339 struct rdma_cm_id *cmid;
2340 struct sockaddr_in srcaddr;
2341 struct sockaddr_in dstaddr;
2344 if (!dev->ibd_hdev || /* initializing */
2345 !dev->ibd_hdev->ibh_cmid || /* listener is dead */
2346 *kiblnd_tunables.kib_dev_failover > 1) /* debugging */
2350 * XXX: it's UGLY, but I don't have better way to find
2351 * ib-bonding HCA failover because:
2353 * a. no reliable CM event for HCA failover...
2354 * b. no OFED API to get ib_device for current net_device...
2356 * We have only two choices at this point:
2358 * a. rdma_bind_addr(), it will conflict with listener cmid
2359 * b. rdma_resolve_addr() to zero addr
2361 cmid = kiblnd_rdma_create_id(kiblnd_dummy_callback, dev, RDMA_PS_TCP,
2365 CERROR("Failed to create cmid for failover: %d\n", rc);
2369 memset(&srcaddr, 0, sizeof(srcaddr));
2370 srcaddr.sin_family = AF_INET;
2371 srcaddr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2373 memset(&dstaddr, 0, sizeof(dstaddr));
2374 dstaddr.sin_family = AF_INET;
2375 rc = rdma_resolve_addr(cmid, (struct sockaddr *)&srcaddr,
2376 (struct sockaddr *)&dstaddr, 1);
2377 if (rc || !cmid->device) {
2378 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2379 dev->ibd_ifname, &dev->ibd_ifip,
2381 rdma_destroy_id(cmid);
2385 rc = dev->ibd_hdev->ibh_ibdev != cmid->device; /* true for failover */
2386 rdma_destroy_id(cmid);
2391 int kiblnd_dev_failover(struct kib_dev *dev)
2393 LIST_HEAD(zombie_tpo);
2394 LIST_HEAD(zombie_ppo);
2395 LIST_HEAD(zombie_fpo);
2396 struct rdma_cm_id *cmid = NULL;
2397 struct kib_hca_dev *hdev = NULL;
2399 struct kib_net *net;
2400 struct sockaddr_in addr;
2401 unsigned long flags;
2405 LASSERT(*kiblnd_tunables.kib_dev_failover > 1 ||
2406 dev->ibd_can_failover || !dev->ibd_hdev);
2408 rc = kiblnd_dev_need_failover(dev);
2412 if (dev->ibd_hdev &&
2413 dev->ibd_hdev->ibh_cmid) {
2415 * XXX it's not good to close old listener at here,
2416 * because we can fail to create new listener.
2417 * But we have to close it now, otherwise rdma_bind_addr
2418 * will return EADDRINUSE... How crap!
2420 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2422 cmid = dev->ibd_hdev->ibh_cmid;
2424 * make next schedule of kiblnd_dev_need_failover()
2427 dev->ibd_hdev->ibh_cmid = NULL;
2428 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2430 rdma_destroy_id(cmid);
2433 cmid = kiblnd_rdma_create_id(kiblnd_cm_callback, dev, RDMA_PS_TCP,
2437 CERROR("Failed to create cmid for failover: %d\n", rc);
2441 memset(&addr, 0, sizeof(addr));
2442 addr.sin_family = AF_INET;
2443 addr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2444 addr.sin_port = htons(*kiblnd_tunables.kib_service);
2446 /* Bind to failover device or port */
2447 rc = rdma_bind_addr(cmid, (struct sockaddr *)&addr);
2448 if (rc || !cmid->device) {
2449 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2450 dev->ibd_ifname, &dev->ibd_ifip,
2452 rdma_destroy_id(cmid);
2456 LIBCFS_ALLOC(hdev, sizeof(*hdev));
2458 CERROR("Failed to allocate kib_hca_dev\n");
2459 rdma_destroy_id(cmid);
2464 atomic_set(&hdev->ibh_ref, 1);
2465 hdev->ibh_dev = dev;
2466 hdev->ibh_cmid = cmid;
2467 hdev->ibh_ibdev = cmid->device;
2469 pd = ib_alloc_pd(cmid->device, 0);
2472 CERROR("Can't allocate PD: %d\n", rc);
2478 rc = rdma_listen(cmid, 0);
2480 CERROR("Can't start new listener: %d\n", rc);
2484 rc = kiblnd_hdev_setup_mrs(hdev);
2486 CERROR("Can't setup device: %d\n", rc);
2490 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2492 swap(dev->ibd_hdev, hdev); /* take over the refcount */
2494 list_for_each_entry(net, &dev->ibd_nets, ibn_list) {
2495 cfs_cpt_for_each(i, lnet_cpt_table()) {
2496 kiblnd_fail_poolset(&net->ibn_tx_ps[i]->tps_poolset,
2499 if (net->ibn_fmr_ps)
2500 kiblnd_fail_fmr_poolset(net->ibn_fmr_ps[i],
2505 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2507 if (!list_empty(&zombie_tpo))
2508 kiblnd_destroy_pool_list(&zombie_tpo);
2509 if (!list_empty(&zombie_ppo))
2510 kiblnd_destroy_pool_list(&zombie_ppo);
2511 if (!list_empty(&zombie_fpo))
2512 kiblnd_destroy_fmr_pool_list(&zombie_fpo);
2514 kiblnd_hdev_decref(hdev);
2517 dev->ibd_failed_failover++;
2519 dev->ibd_failed_failover = 0;
2524 void kiblnd_destroy_dev(struct kib_dev *dev)
2526 LASSERT(!dev->ibd_nnets);
2527 LASSERT(list_empty(&dev->ibd_nets));
2529 list_del(&dev->ibd_fail_list);
2530 list_del(&dev->ibd_list);
2533 kiblnd_hdev_decref(dev->ibd_hdev);
2535 LIBCFS_FREE(dev, sizeof(*dev));
2538 static struct kib_dev *kiblnd_create_dev(char *ifname)
2540 struct net_device *netdev;
2541 struct kib_dev *dev;
2547 rc = lnet_ipif_query(ifname, &up, &ip, &netmask);
2549 CERROR("Can't query IPoIB interface %s: %d\n",
2555 CERROR("Can't query IPoIB interface %s: it's down\n", ifname);
2559 LIBCFS_ALLOC(dev, sizeof(*dev));
2563 netdev = dev_get_by_name(&init_net, ifname);
2565 dev->ibd_can_failover = 0;
2567 dev->ibd_can_failover = !!(netdev->flags & IFF_MASTER);
2571 INIT_LIST_HEAD(&dev->ibd_nets);
2572 INIT_LIST_HEAD(&dev->ibd_list); /* not yet in kib_devs */
2573 INIT_LIST_HEAD(&dev->ibd_fail_list);
2575 strcpy(&dev->ibd_ifname[0], ifname);
2577 /* initialize the device */
2578 rc = kiblnd_dev_failover(dev);
2580 CERROR("Can't initialize device: %d\n", rc);
2581 LIBCFS_FREE(dev, sizeof(*dev));
2585 list_add_tail(&dev->ibd_list, &kiblnd_data.kib_devs);
2589 static void kiblnd_base_shutdown(void)
2591 struct kib_sched_info *sched;
2594 LASSERT(list_empty(&kiblnd_data.kib_devs));
2596 switch (kiblnd_data.kib_init) {
2600 case IBLND_INIT_ALL:
2601 case IBLND_INIT_DATA:
2602 LASSERT(kiblnd_data.kib_peers);
2603 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++)
2604 LASSERT(list_empty(&kiblnd_data.kib_peers[i]));
2605 LASSERT(list_empty(&kiblnd_data.kib_connd_zombies));
2606 LASSERT(list_empty(&kiblnd_data.kib_connd_conns));
2607 LASSERT(list_empty(&kiblnd_data.kib_reconn_list));
2608 LASSERT(list_empty(&kiblnd_data.kib_reconn_wait));
2610 /* flag threads to terminate; wake and wait for them to die */
2611 kiblnd_data.kib_shutdown = 1;
2614 * NB: we really want to stop scheduler threads net by net
2615 * instead of the whole module, this should be improved
2616 * with dynamic configuration LNet
2618 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds)
2619 wake_up_all(&sched->ibs_waitq);
2621 wake_up_all(&kiblnd_data.kib_connd_waitq);
2622 wake_up_all(&kiblnd_data.kib_failover_waitq);
2625 while (atomic_read(&kiblnd_data.kib_nthreads)) {
2628 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET,
2629 "Waiting for %d threads to terminate\n",
2630 atomic_read(&kiblnd_data.kib_nthreads));
2631 set_current_state(TASK_UNINTERRUPTIBLE);
2632 schedule_timeout(cfs_time_seconds(1));
2637 case IBLND_INIT_NOTHING:
2641 if (kiblnd_data.kib_peers) {
2642 LIBCFS_FREE(kiblnd_data.kib_peers,
2643 sizeof(struct list_head) *
2644 kiblnd_data.kib_peer_hash_size);
2647 if (kiblnd_data.kib_scheds)
2648 cfs_percpt_free(kiblnd_data.kib_scheds);
2650 kiblnd_data.kib_init = IBLND_INIT_NOTHING;
2651 module_put(THIS_MODULE);
2654 static void kiblnd_shutdown(lnet_ni_t *ni)
2656 struct kib_net *net = ni->ni_data;
2657 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2659 unsigned long flags;
2661 LASSERT(kiblnd_data.kib_init == IBLND_INIT_ALL);
2666 write_lock_irqsave(g_lock, flags);
2667 net->ibn_shutdown = 1;
2668 write_unlock_irqrestore(g_lock, flags);
2670 switch (net->ibn_init) {
2674 case IBLND_INIT_ALL:
2675 /* nuke all existing peers within this net */
2676 kiblnd_del_peer(ni, LNET_NID_ANY);
2678 /* Wait for all peer state to clean up */
2680 while (atomic_read(&net->ibn_npeers)) {
2682 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* 2**n? */
2683 "%s: waiting for %d peers to disconnect\n",
2684 libcfs_nid2str(ni->ni_nid),
2685 atomic_read(&net->ibn_npeers));
2686 set_current_state(TASK_UNINTERRUPTIBLE);
2687 schedule_timeout(cfs_time_seconds(1));
2690 kiblnd_net_fini_pools(net);
2692 write_lock_irqsave(g_lock, flags);
2693 LASSERT(net->ibn_dev->ibd_nnets > 0);
2694 net->ibn_dev->ibd_nnets--;
2695 list_del(&net->ibn_list);
2696 write_unlock_irqrestore(g_lock, flags);
2700 case IBLND_INIT_NOTHING:
2701 LASSERT(!atomic_read(&net->ibn_nconns));
2703 if (net->ibn_dev && !net->ibn_dev->ibd_nnets)
2704 kiblnd_destroy_dev(net->ibn_dev);
2709 net->ibn_init = IBLND_INIT_NOTHING;
2712 LIBCFS_FREE(net, sizeof(*net));
2715 if (list_empty(&kiblnd_data.kib_devs))
2716 kiblnd_base_shutdown();
2719 static int kiblnd_base_startup(void)
2721 struct kib_sched_info *sched;
2725 LASSERT(kiblnd_data.kib_init == IBLND_INIT_NOTHING);
2727 try_module_get(THIS_MODULE);
2728 /* zero pointers, flags etc */
2729 memset(&kiblnd_data, 0, sizeof(kiblnd_data));
2731 rwlock_init(&kiblnd_data.kib_global_lock);
2733 INIT_LIST_HEAD(&kiblnd_data.kib_devs);
2734 INIT_LIST_HEAD(&kiblnd_data.kib_failed_devs);
2736 kiblnd_data.kib_peer_hash_size = IBLND_PEER_HASH_SIZE;
2737 LIBCFS_ALLOC(kiblnd_data.kib_peers,
2738 sizeof(struct list_head) * kiblnd_data.kib_peer_hash_size);
2739 if (!kiblnd_data.kib_peers)
2741 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++)
2742 INIT_LIST_HEAD(&kiblnd_data.kib_peers[i]);
2744 spin_lock_init(&kiblnd_data.kib_connd_lock);
2745 INIT_LIST_HEAD(&kiblnd_data.kib_connd_conns);
2746 INIT_LIST_HEAD(&kiblnd_data.kib_connd_zombies);
2747 INIT_LIST_HEAD(&kiblnd_data.kib_reconn_list);
2748 INIT_LIST_HEAD(&kiblnd_data.kib_reconn_wait);
2750 init_waitqueue_head(&kiblnd_data.kib_connd_waitq);
2751 init_waitqueue_head(&kiblnd_data.kib_failover_waitq);
2753 kiblnd_data.kib_scheds = cfs_percpt_alloc(lnet_cpt_table(),
2755 if (!kiblnd_data.kib_scheds)
2758 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
2761 spin_lock_init(&sched->ibs_lock);
2762 INIT_LIST_HEAD(&sched->ibs_conns);
2763 init_waitqueue_head(&sched->ibs_waitq);
2765 nthrs = cfs_cpt_weight(lnet_cpt_table(), i);
2766 if (*kiblnd_tunables.kib_nscheds > 0) {
2767 nthrs = min(nthrs, *kiblnd_tunables.kib_nscheds);
2770 * max to half of CPUs, another half is reserved for
2771 * upper layer modules
2773 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
2776 sched->ibs_nthreads_max = nthrs;
2780 kiblnd_data.kib_error_qpa.qp_state = IB_QPS_ERR;
2782 /* lists/ptrs/locks initialised */
2783 kiblnd_data.kib_init = IBLND_INIT_DATA;
2784 /*****************************************************/
2786 rc = kiblnd_thread_start(kiblnd_connd, NULL, "kiblnd_connd");
2788 CERROR("Can't spawn o2iblnd connd: %d\n", rc);
2792 if (*kiblnd_tunables.kib_dev_failover)
2793 rc = kiblnd_thread_start(kiblnd_failover_thread, NULL,
2797 CERROR("Can't spawn o2iblnd failover thread: %d\n", rc);
2801 /* flag everything initialised */
2802 kiblnd_data.kib_init = IBLND_INIT_ALL;
2803 /*****************************************************/
2808 kiblnd_base_shutdown();
2812 static int kiblnd_start_schedulers(struct kib_sched_info *sched)
2818 if (!sched->ibs_nthreads) {
2819 if (*kiblnd_tunables.kib_nscheds > 0) {
2820 nthrs = sched->ibs_nthreads_max;
2822 nthrs = cfs_cpt_weight(lnet_cpt_table(),
2824 nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
2825 nthrs = min(IBLND_N_SCHED_HIGH, nthrs);
2828 LASSERT(sched->ibs_nthreads <= sched->ibs_nthreads_max);
2829 /* increase one thread if there is new interface */
2830 nthrs = sched->ibs_nthreads < sched->ibs_nthreads_max;
2833 for (i = 0; i < nthrs; i++) {
2837 id = KIB_THREAD_ID(sched->ibs_cpt, sched->ibs_nthreads + i);
2838 snprintf(name, sizeof(name), "kiblnd_sd_%02ld_%02ld",
2839 KIB_THREAD_CPT(id), KIB_THREAD_TID(id));
2840 rc = kiblnd_thread_start(kiblnd_scheduler, (void *)id, name);
2844 CERROR("Can't spawn thread %d for scheduler[%d]: %d\n",
2845 sched->ibs_cpt, sched->ibs_nthreads + i, rc);
2849 sched->ibs_nthreads += i;
2853 static int kiblnd_dev_start_threads(struct kib_dev *dev, int newdev, __u32 *cpts,
2860 for (i = 0; i < ncpts; i++) {
2861 struct kib_sched_info *sched;
2863 cpt = !cpts ? i : cpts[i];
2864 sched = kiblnd_data.kib_scheds[cpt];
2866 if (!newdev && sched->ibs_nthreads > 0)
2869 rc = kiblnd_start_schedulers(kiblnd_data.kib_scheds[cpt]);
2871 CERROR("Failed to start scheduler threads for %s\n",
2879 static struct kib_dev *kiblnd_dev_search(char *ifname)
2881 struct kib_dev *alias = NULL;
2882 struct kib_dev *dev;
2886 colon = strchr(ifname, ':');
2887 list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) {
2888 if (!strcmp(&dev->ibd_ifname[0], ifname))
2894 colon2 = strchr(dev->ibd_ifname, ':');
2900 if (!strcmp(&dev->ibd_ifname[0], ifname))
2911 static int kiblnd_startup(lnet_ni_t *ni)
2914 struct kib_dev *ibdev = NULL;
2915 struct kib_net *net;
2916 struct timespec64 tv;
2917 unsigned long flags;
2921 LASSERT(ni->ni_lnd == &the_o2iblnd);
2923 if (kiblnd_data.kib_init == IBLND_INIT_NOTHING) {
2924 rc = kiblnd_base_startup();
2929 LIBCFS_ALLOC(net, sizeof(*net));
2934 ktime_get_real_ts64(&tv);
2935 net->ibn_incarnation = tv.tv_sec * USEC_PER_SEC +
2936 tv.tv_nsec / NSEC_PER_USEC;
2938 rc = kiblnd_tunables_setup(ni);
2942 if (ni->ni_interfaces[0]) {
2943 /* Use the IPoIB interface specified in 'networks=' */
2945 CLASSERT(LNET_MAX_INTERFACES > 1);
2946 if (ni->ni_interfaces[1]) {
2947 CERROR("Multiple interfaces not supported\n");
2951 ifname = ni->ni_interfaces[0];
2953 ifname = *kiblnd_tunables.kib_default_ipif;
2956 if (strlen(ifname) >= sizeof(ibdev->ibd_ifname)) {
2957 CERROR("IPoIB interface name too long: %s\n", ifname);
2961 ibdev = kiblnd_dev_search(ifname);
2964 /* hmm...create kib_dev even for alias */
2965 if (!ibdev || strcmp(&ibdev->ibd_ifname[0], ifname))
2966 ibdev = kiblnd_create_dev(ifname);
2971 net->ibn_dev = ibdev;
2972 ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid), ibdev->ibd_ifip);
2974 rc = kiblnd_dev_start_threads(ibdev, newdev,
2975 ni->ni_cpts, ni->ni_ncpts);
2979 rc = kiblnd_net_init_pools(net, ni, ni->ni_cpts, ni->ni_ncpts);
2981 CERROR("Failed to initialize NI pools: %d\n", rc);
2985 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2987 list_add_tail(&net->ibn_list, &ibdev->ibd_nets);
2988 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2990 net->ibn_init = IBLND_INIT_ALL;
2995 if (!net->ibn_dev && ibdev)
2996 kiblnd_destroy_dev(ibdev);
2999 kiblnd_shutdown(ni);
3001 CDEBUG(D_NET, "kiblnd_startup failed\n");
3005 static lnd_t the_o2iblnd = {
3006 .lnd_type = O2IBLND,
3007 .lnd_startup = kiblnd_startup,
3008 .lnd_shutdown = kiblnd_shutdown,
3009 .lnd_ctl = kiblnd_ctl,
3010 .lnd_query = kiblnd_query,
3011 .lnd_send = kiblnd_send,
3012 .lnd_recv = kiblnd_recv,
3015 static void __exit ko2iblnd_exit(void)
3017 lnet_unregister_lnd(&the_o2iblnd);
3020 static int __init ko2iblnd_init(void)
3022 CLASSERT(sizeof(struct kib_msg) <= IBLND_MSG_SIZE);
3023 CLASSERT(offsetof(struct kib_msg,
3024 ibm_u.get.ibgm_rd.rd_frags[IBLND_MAX_RDMA_FRAGS])
3026 CLASSERT(offsetof(struct kib_msg,
3027 ibm_u.putack.ibpam_rd.rd_frags[IBLND_MAX_RDMA_FRAGS])
3030 kiblnd_tunables_init();
3032 lnet_register_lnd(&the_o2iblnd);
3037 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3038 MODULE_DESCRIPTION("OpenIB gen2 LNet Network Driver");
3039 MODULE_VERSION("2.7.0");
3040 MODULE_LICENSE("GPL");
3042 module_init(ko2iblnd_init);
3043 module_exit(ko2iblnd_exit);