1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
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>
45 .lnd_startup = kiblnd_startup,
46 .lnd_shutdown = kiblnd_shutdown,
47 .lnd_ctl = kiblnd_ctl,
48 .lnd_query = kiblnd_query,
49 .lnd_send = kiblnd_send,
50 .lnd_recv = kiblnd_recv,
53 kib_data_t kiblnd_data;
56 kiblnd_cksum (void *ptr, int nob)
62 sum = ((sum << 1) | (sum >> 31)) + *c++;
64 /* ensure I don't return 0 (== no checksum) */
65 return (sum == 0) ? 1 : sum;
69 kiblnd_msgtype2str(int type)
72 case IBLND_MSG_CONNREQ:
75 case IBLND_MSG_CONNACK:
81 case IBLND_MSG_IMMEDIATE:
84 case IBLND_MSG_PUT_REQ:
87 case IBLND_MSG_PUT_NAK:
90 case IBLND_MSG_PUT_ACK:
93 case IBLND_MSG_PUT_DONE:
96 case IBLND_MSG_GET_REQ:
99 case IBLND_MSG_GET_DONE:
108 kiblnd_msgtype2size(int type)
110 const int hdr_size = offsetof(kib_msg_t, ibm_u);
113 case IBLND_MSG_CONNREQ:
114 case IBLND_MSG_CONNACK:
115 return hdr_size + sizeof(kib_connparams_t);
120 case IBLND_MSG_IMMEDIATE:
121 return offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[0]);
123 case IBLND_MSG_PUT_REQ:
124 return hdr_size + sizeof(kib_putreq_msg_t);
126 case IBLND_MSG_PUT_ACK:
127 return hdr_size + sizeof(kib_putack_msg_t);
129 case IBLND_MSG_GET_REQ:
130 return hdr_size + sizeof(kib_get_msg_t);
132 case IBLND_MSG_PUT_NAK:
133 case IBLND_MSG_PUT_DONE:
134 case IBLND_MSG_GET_DONE:
135 return hdr_size + sizeof(kib_completion_msg_t);
142 kiblnd_unpack_rd(kib_msg_t *msg, int flip)
149 LASSERT (msg->ibm_type == IBLND_MSG_GET_REQ ||
150 msg->ibm_type == IBLND_MSG_PUT_ACK);
152 rd = msg->ibm_type == IBLND_MSG_GET_REQ ?
153 &msg->ibm_u.get.ibgm_rd :
154 &msg->ibm_u.putack.ibpam_rd;
157 __swab32s(&rd->rd_key);
158 __swab32s(&rd->rd_nfrags);
163 if (n <= 0 || n > IBLND_MAX_RDMA_FRAGS) {
164 CERROR("Bad nfrags: %d, should be 0 < n <= %d\n",
165 n, IBLND_MAX_RDMA_FRAGS);
169 nob = offsetof (kib_msg_t, ibm_u) +
170 kiblnd_rd_msg_size(rd, msg->ibm_type, n);
172 if (msg->ibm_nob < nob) {
173 CERROR("Short %s: %d(%d)\n",
174 kiblnd_msgtype2str(msg->ibm_type), msg->ibm_nob, nob);
181 for (i = 0; i < n; i++) {
182 __swab32s(&rd->rd_frags[i].rf_nob);
183 __swab64s(&rd->rd_frags[i].rf_addr);
190 kiblnd_pack_msg (lnet_ni_t *ni, kib_msg_t *msg, int version,
191 int credits, lnet_nid_t dstnid, __u64 dststamp)
193 kib_net_t *net = ni->ni_data;
195 /* CAVEAT EMPTOR! all message fields not set here should have been
196 * initialised previously. */
197 msg->ibm_magic = IBLND_MSG_MAGIC;
198 msg->ibm_version = version;
200 msg->ibm_credits = credits;
203 msg->ibm_srcnid = ni->ni_nid;
204 msg->ibm_srcstamp = net->ibn_incarnation;
205 msg->ibm_dstnid = dstnid;
206 msg->ibm_dststamp = dststamp;
208 if (*kiblnd_tunables.kib_cksum) {
209 /* NB ibm_cksum zero while computing cksum */
210 msg->ibm_cksum = kiblnd_cksum(msg, msg->ibm_nob);
215 kiblnd_unpack_msg(kib_msg_t *msg, int nob)
217 const int hdr_size = offsetof(kib_msg_t, ibm_u);
223 /* 6 bytes are enough to have received magic + version */
225 CERROR("Short message: %d\n", nob);
229 if (msg->ibm_magic == IBLND_MSG_MAGIC) {
231 } else if (msg->ibm_magic == __swab32(IBLND_MSG_MAGIC)) {
234 CERROR("Bad magic: %08x\n", msg->ibm_magic);
238 version = flip ? __swab16(msg->ibm_version) : msg->ibm_version;
239 if (version != IBLND_MSG_VERSION &&
240 version != IBLND_MSG_VERSION_1) {
241 CERROR("Bad version: %x\n", version);
245 if (nob < hdr_size) {
246 CERROR("Short message: %d\n", nob);
250 msg_nob = flip ? __swab32(msg->ibm_nob) : msg->ibm_nob;
252 CERROR("Short message: got %d, wanted %d\n", nob, msg_nob);
256 /* checksum must be computed with ibm_cksum zero and BEFORE anything
258 msg_cksum = flip ? __swab32(msg->ibm_cksum) : msg->ibm_cksum;
260 if (msg_cksum != 0 &&
261 msg_cksum != kiblnd_cksum(msg, msg_nob)) {
262 CERROR("Bad checksum\n");
266 msg->ibm_cksum = msg_cksum;
269 /* leave magic unflipped as a clue to peer endianness */
270 msg->ibm_version = version;
271 CLASSERT (sizeof(msg->ibm_type) == 1);
272 CLASSERT (sizeof(msg->ibm_credits) == 1);
273 msg->ibm_nob = msg_nob;
274 __swab64s(&msg->ibm_srcnid);
275 __swab64s(&msg->ibm_srcstamp);
276 __swab64s(&msg->ibm_dstnid);
277 __swab64s(&msg->ibm_dststamp);
280 if (msg->ibm_srcnid == LNET_NID_ANY) {
281 CERROR("Bad src nid: %s\n", libcfs_nid2str(msg->ibm_srcnid));
285 if (msg_nob < kiblnd_msgtype2size(msg->ibm_type)) {
286 CERROR("Short %s: %d(%d)\n", kiblnd_msgtype2str(msg->ibm_type),
287 msg_nob, kiblnd_msgtype2size(msg->ibm_type));
291 switch (msg->ibm_type) {
293 CERROR("Unknown message type %x\n", msg->ibm_type);
297 case IBLND_MSG_IMMEDIATE:
298 case IBLND_MSG_PUT_REQ:
301 case IBLND_MSG_PUT_ACK:
302 case IBLND_MSG_GET_REQ:
303 if (kiblnd_unpack_rd(msg, flip))
307 case IBLND_MSG_PUT_NAK:
308 case IBLND_MSG_PUT_DONE:
309 case IBLND_MSG_GET_DONE:
311 __swab32s(&msg->ibm_u.completion.ibcm_status);
314 case IBLND_MSG_CONNREQ:
315 case IBLND_MSG_CONNACK:
317 __swab16s(&msg->ibm_u.connparams.ibcp_queue_depth);
318 __swab16s(&msg->ibm_u.connparams.ibcp_max_frags);
319 __swab32s(&msg->ibm_u.connparams.ibcp_max_msg_size);
327 kiblnd_create_peer (lnet_ni_t *ni, kib_peer_t **peerp, lnet_nid_t nid)
330 kib_net_t *net = ni->ni_data;
333 LASSERT (net != NULL);
334 LASSERT (nid != LNET_NID_ANY);
336 LIBCFS_ALLOC(peer, sizeof(*peer));
338 CERROR("Cannot allocate peer\n");
342 memset(peer, 0, sizeof(*peer)); /* zero flags etc */
347 peer->ibp_last_alive = 0;
348 cfs_atomic_set(&peer->ibp_refcount, 1); /* 1 ref for caller */
350 CFS_INIT_LIST_HEAD(&peer->ibp_list); /* not in the peer table yet */
351 CFS_INIT_LIST_HEAD(&peer->ibp_conns);
352 CFS_INIT_LIST_HEAD(&peer->ibp_tx_queue);
354 cfs_write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
356 /* always called with a ref on ni, which prevents ni being shutdown */
357 LASSERT (net->ibn_shutdown == 0);
359 /* npeers only grows with the global lock held */
360 cfs_atomic_inc(&net->ibn_npeers);
362 cfs_write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
369 kiblnd_destroy_peer (kib_peer_t *peer)
371 kib_net_t *net = peer->ibp_ni->ni_data;
373 LASSERT (net != NULL);
374 LASSERT (cfs_atomic_read(&peer->ibp_refcount) == 0);
375 LASSERT (!kiblnd_peer_active(peer));
376 LASSERT (peer->ibp_connecting == 0);
377 LASSERT (peer->ibp_accepting == 0);
378 LASSERT (cfs_list_empty(&peer->ibp_conns));
379 LASSERT (cfs_list_empty(&peer->ibp_tx_queue));
381 LIBCFS_FREE(peer, sizeof(*peer));
383 /* NB a peer's connections keep a reference on their peer until
384 * they are destroyed, so we can be assured that _all_ state to do
385 * with this peer has been cleaned up when its refcount drops to
387 cfs_atomic_dec(&net->ibn_npeers);
391 kiblnd_find_peer_locked (lnet_nid_t nid)
393 /* the caller is responsible for accounting the additional reference
394 * that this creates */
395 cfs_list_t *peer_list = kiblnd_nid2peerlist(nid);
399 cfs_list_for_each (tmp, peer_list) {
401 peer = cfs_list_entry(tmp, kib_peer_t, ibp_list);
403 LASSERT (peer->ibp_connecting > 0 || /* creating conns */
404 peer->ibp_accepting > 0 ||
405 !cfs_list_empty(&peer->ibp_conns)); /* active conn */
407 if (peer->ibp_nid != nid)
410 CDEBUG(D_NET, "got peer [%p] -> %s (%d) version: %x\n",
411 peer, libcfs_nid2str(nid),
412 cfs_atomic_read(&peer->ibp_refcount),
420 kiblnd_unlink_peer_locked (kib_peer_t *peer)
422 LASSERT (cfs_list_empty(&peer->ibp_conns));
424 LASSERT (kiblnd_peer_active(peer));
425 cfs_list_del_init(&peer->ibp_list);
426 /* lose peerlist's ref */
427 kiblnd_peer_decref(peer);
431 kiblnd_get_peer_info (lnet_ni_t *ni, int index,
432 lnet_nid_t *nidp, int *count)
439 cfs_read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
441 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
443 cfs_list_for_each (ptmp, &kiblnd_data.kib_peers[i]) {
445 peer = cfs_list_entry(ptmp, kib_peer_t, ibp_list);
446 LASSERT (peer->ibp_connecting > 0 ||
447 peer->ibp_accepting > 0 ||
448 !cfs_list_empty(&peer->ibp_conns));
450 if (peer->ibp_ni != ni)
456 *nidp = peer->ibp_nid;
457 *count = cfs_atomic_read(&peer->ibp_refcount);
459 cfs_read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
465 cfs_read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
470 kiblnd_del_peer_locked (kib_peer_t *peer)
476 if (cfs_list_empty(&peer->ibp_conns)) {
477 kiblnd_unlink_peer_locked(peer);
479 cfs_list_for_each_safe (ctmp, cnxt, &peer->ibp_conns) {
480 conn = cfs_list_entry(ctmp, kib_conn_t, ibc_list);
482 kiblnd_close_conn_locked(conn, 0);
484 /* NB closing peer's last conn unlinked it. */
486 /* NB peer now unlinked; might even be freed if the peer table had the
491 kiblnd_del_peer (lnet_ni_t *ni, lnet_nid_t nid)
493 CFS_LIST_HEAD (zombies);
503 cfs_write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
505 if (nid != LNET_NID_ANY) {
506 lo = hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
509 hi = kiblnd_data.kib_peer_hash_size - 1;
512 for (i = lo; i <= hi; i++) {
513 cfs_list_for_each_safe (ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
514 peer = cfs_list_entry(ptmp, kib_peer_t, ibp_list);
515 LASSERT (peer->ibp_connecting > 0 ||
516 peer->ibp_accepting > 0 ||
517 !cfs_list_empty(&peer->ibp_conns));
519 if (peer->ibp_ni != ni)
522 if (!(nid == LNET_NID_ANY || peer->ibp_nid == nid))
525 if (!cfs_list_empty(&peer->ibp_tx_queue)) {
526 LASSERT (cfs_list_empty(&peer->ibp_conns));
528 cfs_list_splice_init(&peer->ibp_tx_queue,
532 kiblnd_del_peer_locked(peer);
533 rc = 0; /* matched something */
537 cfs_write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
539 kiblnd_txlist_done(ni, &zombies, -EIO);
545 kiblnd_get_conn_by_idx (lnet_ni_t *ni, int index)
554 cfs_read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
556 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
557 cfs_list_for_each (ptmp, &kiblnd_data.kib_peers[i]) {
559 peer = cfs_list_entry(ptmp, kib_peer_t, ibp_list);
560 LASSERT (peer->ibp_connecting > 0 ||
561 peer->ibp_accepting > 0 ||
562 !cfs_list_empty(&peer->ibp_conns));
564 if (peer->ibp_ni != ni)
567 cfs_list_for_each (ctmp, &peer->ibp_conns) {
571 conn = cfs_list_entry(ctmp, kib_conn_t,
573 kiblnd_conn_addref(conn);
574 cfs_read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
581 cfs_read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
586 kiblnd_debug_rx (kib_rx_t *rx)
588 CDEBUG(D_CONSOLE, " %p status %d msg_type %x cred %d\n",
589 rx, rx->rx_status, rx->rx_msg->ibm_type,
590 rx->rx_msg->ibm_credits);
594 kiblnd_debug_tx (kib_tx_t *tx)
596 CDEBUG(D_CONSOLE, " %p snd %d q %d w %d rc %d dl %lx "
597 "cookie "LPX64" msg %s%s type %x cred %d\n",
598 tx, tx->tx_sending, tx->tx_queued, tx->tx_waiting,
599 tx->tx_status, tx->tx_deadline, tx->tx_cookie,
600 tx->tx_lntmsg[0] == NULL ? "-" : "!",
601 tx->tx_lntmsg[1] == NULL ? "-" : "!",
602 tx->tx_msg->ibm_type, tx->tx_msg->ibm_credits);
606 kiblnd_debug_conn (kib_conn_t *conn)
611 cfs_spin_lock(&conn->ibc_lock);
613 CDEBUG(D_CONSOLE, "conn[%d] %p [version %x] -> %s: \n",
614 cfs_atomic_read(&conn->ibc_refcount), conn,
615 conn->ibc_version, libcfs_nid2str(conn->ibc_peer->ibp_nid));
616 CDEBUG(D_CONSOLE, " state %d nposted %d/%d cred %d o_cred %d r_cred %d\n",
617 conn->ibc_state, conn->ibc_noops_posted,
618 conn->ibc_nsends_posted, conn->ibc_credits,
619 conn->ibc_outstanding_credits, conn->ibc_reserved_credits);
620 CDEBUG(D_CONSOLE, " comms_err %d\n", conn->ibc_comms_error);
622 CDEBUG(D_CONSOLE, " early_rxs:\n");
623 cfs_list_for_each(tmp, &conn->ibc_early_rxs)
624 kiblnd_debug_rx(cfs_list_entry(tmp, kib_rx_t, rx_list));
626 CDEBUG(D_CONSOLE, " tx_queue_nocred:\n");
627 cfs_list_for_each(tmp, &conn->ibc_tx_queue_nocred)
628 kiblnd_debug_tx(cfs_list_entry(tmp, kib_tx_t, tx_list));
630 CDEBUG(D_CONSOLE, " tx_queue_rsrvd:\n");
631 cfs_list_for_each(tmp, &conn->ibc_tx_queue_rsrvd)
632 kiblnd_debug_tx(cfs_list_entry(tmp, kib_tx_t, tx_list));
634 CDEBUG(D_CONSOLE, " tx_queue:\n");
635 cfs_list_for_each(tmp, &conn->ibc_tx_queue)
636 kiblnd_debug_tx(cfs_list_entry(tmp, kib_tx_t, tx_list));
638 CDEBUG(D_CONSOLE, " active_txs:\n");
639 cfs_list_for_each(tmp, &conn->ibc_active_txs)
640 kiblnd_debug_tx(cfs_list_entry(tmp, kib_tx_t, tx_list));
642 CDEBUG(D_CONSOLE, " rxs:\n");
643 for (i = 0; i < IBLND_RX_MSGS(conn->ibc_version); i++)
644 kiblnd_debug_rx(&conn->ibc_rxs[i]);
646 cfs_spin_unlock(&conn->ibc_lock);
650 kiblnd_translate_mtu(int value)
671 kiblnd_setup_mtu_locked(struct rdma_cm_id *cmid)
675 /* XXX There is no path record for iWARP, set by netdev->change_mtu? */
676 if (cmid->route.path_rec == NULL)
679 mtu = kiblnd_translate_mtu(*kiblnd_tunables.kib_ib_mtu);
682 cmid->route.path_rec->mtu = mtu;
686 kiblnd_create_conn(kib_peer_t *peer, struct rdma_cm_id *cmid,
687 int state, int version)
690 * If the new conn is created successfully it takes over the caller's
691 * ref on 'peer'. It also "owns" 'cmid' and destroys it when it itself
692 * is destroyed. On failure, the caller's ref on 'peer' remains and
693 * she must dispose of 'cmid'. (Actually I'd block forever if I tried
694 * to destroy 'cmid' here since I'm called from the CM which still has
695 * its ref on 'cmid'). */
696 cfs_rwlock_t *glock = &kiblnd_data.kib_global_lock;
697 kib_net_t *net = peer->ibp_ni->ni_data;
698 kib_dev_t *dev = net->ibn_dev;
699 struct ib_qp_init_attr *init_qp_attr;
706 LASSERT (net != NULL);
707 LASSERT (!cfs_in_interrupt());
709 LIBCFS_ALLOC(init_qp_attr, sizeof(*init_qp_attr));
710 if (init_qp_attr == NULL) {
711 CERROR("Can't allocate qp_attr for %s\n",
712 libcfs_nid2str(peer->ibp_nid));
716 LIBCFS_ALLOC(conn, sizeof(*conn));
718 CERROR("Can't allocate connection for %s\n",
719 libcfs_nid2str(peer->ibp_nid));
723 memset(conn, 0, sizeof(*conn)); /* zero flags, NULL pointers etc... */
725 conn->ibc_state = IBLND_CONN_INIT;
726 conn->ibc_version = version;
727 conn->ibc_peer = peer; /* I take the caller's ref */
728 cmid->context = conn; /* for future CM callbacks */
729 conn->ibc_cmid = cmid;
731 CFS_INIT_LIST_HEAD(&conn->ibc_early_rxs);
732 CFS_INIT_LIST_HEAD(&conn->ibc_tx_queue);
733 CFS_INIT_LIST_HEAD(&conn->ibc_tx_queue_rsrvd);
734 CFS_INIT_LIST_HEAD(&conn->ibc_tx_queue_nocred);
735 CFS_INIT_LIST_HEAD(&conn->ibc_active_txs);
736 cfs_spin_lock_init(&conn->ibc_lock);
738 LIBCFS_ALLOC(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
739 if (conn->ibc_connvars == NULL) {
740 CERROR("Can't allocate in-progress connection state\n");
743 memset(conn->ibc_connvars, 0, sizeof(*conn->ibc_connvars));
745 cfs_write_lock_irqsave(glock, flags);
746 if (dev->ibd_failover) {
747 cfs_write_unlock_irqrestore(glock, flags);
748 CERROR("%s: failover in progress\n", dev->ibd_ifname);
752 if (dev->ibd_hdev->ibh_ibdev != cmid->device) {
753 /* wakeup failover thread and teardown connection */
754 if (kiblnd_dev_can_failover(dev)) {
755 cfs_list_add_tail(&dev->ibd_fail_list,
756 &kiblnd_data.kib_failed_devs);
757 cfs_waitq_signal(&kiblnd_data.kib_failover_waitq);
760 cfs_write_unlock_irqrestore(glock, flags);
761 CERROR("cmid HCA(%s), kib_dev(%s) need failover\n",
762 cmid->device->name, dev->ibd_ifname);
766 kiblnd_hdev_addref_locked(dev->ibd_hdev);
767 conn->ibc_hdev = dev->ibd_hdev;
769 kiblnd_setup_mtu_locked(cmid);
771 cfs_write_unlock_irqrestore(glock, flags);
773 LIBCFS_ALLOC(conn->ibc_rxs, IBLND_RX_MSGS(version) * sizeof(kib_rx_t));
774 if (conn->ibc_rxs == NULL) {
775 CERROR("Cannot allocate RX buffers\n");
778 memset(conn->ibc_rxs, 0, IBLND_RX_MSGS(version) * sizeof(kib_rx_t));
780 rc = kiblnd_alloc_pages(&conn->ibc_rx_pages,
781 IBLND_RX_MSG_PAGES(version));
785 kiblnd_map_rx_descs(conn);
787 #ifdef HAVE_OFED_IB_COMP_VECTOR
788 cq = ib_create_cq(cmid->device,
789 kiblnd_cq_completion, kiblnd_cq_event, conn,
790 IBLND_CQ_ENTRIES(version), 0);
792 cq = ib_create_cq(cmid->device,
793 kiblnd_cq_completion, kiblnd_cq_event, conn,
794 IBLND_CQ_ENTRIES(version));
797 CERROR("Can't create CQ: %ld, cqe: %d\n",
798 PTR_ERR(cq), IBLND_CQ_ENTRIES(version));
804 rc = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
806 CERROR("Can't request completion notificiation: %d\n", rc);
810 memset(init_qp_attr, 0, sizeof(*init_qp_attr));
811 init_qp_attr->event_handler = kiblnd_qp_event;
812 init_qp_attr->qp_context = conn;
813 init_qp_attr->cap.max_send_wr = IBLND_SEND_WRS(version);
814 init_qp_attr->cap.max_recv_wr = IBLND_RECV_WRS(version);
815 init_qp_attr->cap.max_send_sge = 1;
816 init_qp_attr->cap.max_recv_sge = 1;
817 init_qp_attr->sq_sig_type = IB_SIGNAL_REQ_WR;
818 init_qp_attr->qp_type = IB_QPT_RC;
819 init_qp_attr->send_cq = cq;
820 init_qp_attr->recv_cq = cq;
822 rc = rdma_create_qp(cmid, conn->ibc_hdev->ibh_pd, init_qp_attr);
824 CERROR("Can't create QP: %d, send_wr: %d, recv_wr: %d\n",
825 rc, init_qp_attr->cap.max_send_wr,
826 init_qp_attr->cap.max_recv_wr);
830 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
832 /* 1 ref for caller and each rxmsg */
833 cfs_atomic_set(&conn->ibc_refcount, 1 + IBLND_RX_MSGS(version));
834 conn->ibc_nrx = IBLND_RX_MSGS(version);
837 for (i = 0; i < IBLND_RX_MSGS(version); i++) {
838 rc = kiblnd_post_rx(&conn->ibc_rxs[i],
839 IBLND_POSTRX_NO_CREDIT);
841 CERROR("Can't post rxmsg: %d\n", rc);
843 /* Make posted receives complete */
844 kiblnd_abort_receives(conn);
846 /* correct # of posted buffers
847 * NB locking needed now I'm racing with completion */
848 cfs_spin_lock_irqsave(&kiblnd_data.kib_sched_lock,
850 conn->ibc_nrx -= IBLND_RX_MSGS(version) - i;
851 cfs_spin_unlock_irqrestore(&kiblnd_data.kib_sched_lock,
854 /* cmid will be destroyed by CM(ofed) after cm_callback
855 * returned, so we can't refer it anymore
856 * (by kiblnd_connd()->kiblnd_destroy_conn) */
857 rdma_destroy_qp(conn->ibc_cmid);
858 conn->ibc_cmid = NULL;
860 /* Drop my own and unused rxbuffer refcounts */
861 while (i++ <= IBLND_RX_MSGS(version))
862 kiblnd_conn_decref(conn);
868 /* Init successful! */
869 LASSERT (state == IBLND_CONN_ACTIVE_CONNECT ||
870 state == IBLND_CONN_PASSIVE_WAIT);
871 conn->ibc_state = state;
874 cfs_atomic_inc(&net->ibn_nconns);
878 kiblnd_destroy_conn(conn);
880 LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr));
886 kiblnd_destroy_conn (kib_conn_t *conn)
888 struct rdma_cm_id *cmid = conn->ibc_cmid;
889 kib_peer_t *peer = conn->ibc_peer;
892 LASSERT (!cfs_in_interrupt());
893 LASSERT (cfs_atomic_read(&conn->ibc_refcount) == 0);
894 LASSERT (cfs_list_empty(&conn->ibc_early_rxs));
895 LASSERT (cfs_list_empty(&conn->ibc_tx_queue));
896 LASSERT (cfs_list_empty(&conn->ibc_tx_queue_rsrvd));
897 LASSERT (cfs_list_empty(&conn->ibc_tx_queue_nocred));
898 LASSERT (cfs_list_empty(&conn->ibc_active_txs));
899 LASSERT (conn->ibc_noops_posted == 0);
900 LASSERT (conn->ibc_nsends_posted == 0);
902 switch (conn->ibc_state) {
904 /* conn must be completely disengaged from the network */
907 case IBLND_CONN_DISCONNECTED:
908 /* connvars should have been freed already */
909 LASSERT (conn->ibc_connvars == NULL);
912 case IBLND_CONN_INIT:
916 /* conn->ibc_cmid might be destroyed by CM already */
917 if (cmid != NULL && cmid->qp != NULL)
918 rdma_destroy_qp(cmid);
920 if (conn->ibc_cq != NULL) {
921 rc = ib_destroy_cq(conn->ibc_cq);
923 CWARN("Error destroying CQ: %d\n", rc);
926 if (conn->ibc_rx_pages != NULL)
927 kiblnd_unmap_rx_descs(conn);
929 if (conn->ibc_rxs != NULL) {
930 LIBCFS_FREE(conn->ibc_rxs,
931 IBLND_RX_MSGS(conn->ibc_version) * sizeof(kib_rx_t));
934 if (conn->ibc_connvars != NULL)
935 LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
937 if (conn->ibc_hdev != NULL)
938 kiblnd_hdev_decref(conn->ibc_hdev);
940 /* See CAVEAT EMPTOR above in kiblnd_create_conn */
941 if (conn->ibc_state != IBLND_CONN_INIT) {
942 kib_net_t *net = peer->ibp_ni->ni_data;
944 kiblnd_peer_decref(peer);
945 rdma_destroy_id(cmid);
946 cfs_atomic_dec(&net->ibn_nconns);
949 LIBCFS_FREE(conn, sizeof(*conn));
953 kiblnd_close_peer_conns_locked (kib_peer_t *peer, int why)
960 cfs_list_for_each_safe (ctmp, cnxt, &peer->ibp_conns) {
961 conn = cfs_list_entry(ctmp, kib_conn_t, ibc_list);
963 CDEBUG(D_NET, "Closing conn -> %s, "
964 "version: %x, reason: %d\n",
965 libcfs_nid2str(peer->ibp_nid),
966 conn->ibc_version, why);
968 kiblnd_close_conn_locked(conn, why);
976 kiblnd_close_stale_conns_locked (kib_peer_t *peer,
977 int version, __u64 incarnation)
984 cfs_list_for_each_safe (ctmp, cnxt, &peer->ibp_conns) {
985 conn = cfs_list_entry(ctmp, kib_conn_t, ibc_list);
987 if (conn->ibc_version == version &&
988 conn->ibc_incarnation == incarnation)
991 CDEBUG(D_NET, "Closing stale conn -> %s version: %x, "
992 "incarnation:"LPX64"(%x, "LPX64")\n",
993 libcfs_nid2str(peer->ibp_nid),
994 conn->ibc_version, conn->ibc_incarnation,
995 version, incarnation);
997 kiblnd_close_conn_locked(conn, -ESTALE);
1005 kiblnd_close_matching_conns (lnet_ni_t *ni, lnet_nid_t nid)
1013 unsigned long flags;
1016 cfs_write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1018 if (nid != LNET_NID_ANY)
1019 lo = hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers;
1022 hi = kiblnd_data.kib_peer_hash_size - 1;
1025 for (i = lo; i <= hi; i++) {
1026 cfs_list_for_each_safe (ptmp, pnxt, &kiblnd_data.kib_peers[i]) {
1028 peer = cfs_list_entry(ptmp, kib_peer_t, ibp_list);
1029 LASSERT (peer->ibp_connecting > 0 ||
1030 peer->ibp_accepting > 0 ||
1031 !cfs_list_empty(&peer->ibp_conns));
1033 if (peer->ibp_ni != ni)
1036 if (!(nid == LNET_NID_ANY || nid == peer->ibp_nid))
1039 count += kiblnd_close_peer_conns_locked(peer, 0);
1043 cfs_write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1045 /* wildcards always succeed */
1046 if (nid == LNET_NID_ANY)
1049 return (count == 0) ? -ENOENT : 0;
1053 kiblnd_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg)
1055 struct libcfs_ioctl_data *data = arg;
1059 case IOC_LIBCFS_GET_PEER: {
1063 rc = kiblnd_get_peer_info(ni, data->ioc_count,
1065 data->ioc_nid = nid;
1066 data->ioc_count = count;
1070 case IOC_LIBCFS_DEL_PEER: {
1071 rc = kiblnd_del_peer(ni, data->ioc_nid);
1074 case IOC_LIBCFS_GET_CONN: {
1078 conn = kiblnd_get_conn_by_idx(ni, data->ioc_count);
1084 LASSERT (conn->ibc_cmid != NULL);
1085 data->ioc_nid = conn->ibc_peer->ibp_nid;
1086 if (conn->ibc_cmid->route.path_rec == NULL)
1087 data->ioc_u32[0] = 0; /* iWarp has no path MTU */
1090 ib_mtu_enum_to_int(conn->ibc_cmid->route.path_rec->mtu);
1091 kiblnd_conn_decref(conn);
1094 case IOC_LIBCFS_CLOSE_CONNECTION: {
1095 rc = kiblnd_close_matching_conns(ni, data->ioc_nid);
1107 kiblnd_query (lnet_ni_t *ni, lnet_nid_t nid, cfs_time_t *when)
1109 cfs_time_t last_alive = 0;
1110 cfs_time_t now = cfs_time_current();
1111 cfs_rwlock_t *glock = &kiblnd_data.kib_global_lock;
1113 unsigned long flags;
1115 cfs_read_lock_irqsave(glock, flags);
1117 peer = kiblnd_find_peer_locked(nid);
1119 LASSERT (peer->ibp_connecting > 0 || /* creating conns */
1120 peer->ibp_accepting > 0 ||
1121 !cfs_list_empty(&peer->ibp_conns)); /* active conn */
1122 last_alive = peer->ibp_last_alive;
1125 cfs_read_unlock_irqrestore(glock, flags);
1127 if (last_alive != 0)
1130 /* peer is not persistent in hash, trigger peer creation
1131 * and connection establishment with a NULL tx */
1133 kiblnd_launch_tx(ni, NULL, nid);
1135 CDEBUG(D_NET, "Peer %s %p, alive %ld secs ago\n",
1136 libcfs_nid2str(nid), peer,
1137 last_alive ? cfs_duration_sec(now - last_alive) : -1);
1142 kiblnd_free_pages (kib_pages_t *p)
1144 int npages = p->ibp_npages;
1147 for (i = 0; i < npages; i++)
1148 if (p->ibp_pages[i] != NULL)
1149 __free_page(p->ibp_pages[i]);
1151 LIBCFS_FREE (p, offsetof(kib_pages_t, ibp_pages[npages]));
1155 kiblnd_alloc_pages (kib_pages_t **pp, int npages)
1160 LIBCFS_ALLOC(p, offsetof(kib_pages_t, ibp_pages[npages]));
1162 CERROR("Can't allocate descriptor for %d pages\n", npages);
1166 memset(p, 0, offsetof(kib_pages_t, ibp_pages[npages]));
1167 p->ibp_npages = npages;
1169 for (i = 0; i < npages; i++) {
1170 p->ibp_pages[i] = alloc_page(GFP_KERNEL);
1171 if (p->ibp_pages[i] == NULL) {
1172 CERROR("Can't allocate page %d of %d\n", i, npages);
1173 kiblnd_free_pages(p);
1183 kiblnd_unmap_rx_descs(kib_conn_t *conn)
1188 LASSERT (conn->ibc_rxs != NULL);
1189 LASSERT (conn->ibc_hdev != NULL);
1191 for (i = 0; i < IBLND_RX_MSGS(conn->ibc_version); i++) {
1192 rx = &conn->ibc_rxs[i];
1194 LASSERT (rx->rx_nob >= 0); /* not posted */
1196 kiblnd_dma_unmap_single(conn->ibc_hdev->ibh_ibdev,
1197 KIBLND_UNMAP_ADDR(rx, rx_msgunmap,
1199 IBLND_MSG_SIZE, DMA_FROM_DEVICE);
1202 kiblnd_free_pages(conn->ibc_rx_pages);
1204 conn->ibc_rx_pages = NULL;
1208 kiblnd_map_rx_descs(kib_conn_t *conn)
1216 for (pg_off = ipg = i = 0;
1217 i < IBLND_RX_MSGS(conn->ibc_version); i++) {
1218 pg = conn->ibc_rx_pages->ibp_pages[ipg];
1219 rx = &conn->ibc_rxs[i];
1222 rx->rx_msg = (kib_msg_t *)(((char *)page_address(pg)) + pg_off);
1224 rx->rx_msgaddr = kiblnd_dma_map_single(conn->ibc_hdev->ibh_ibdev,
1225 rx->rx_msg, IBLND_MSG_SIZE,
1227 LASSERT (!kiblnd_dma_mapping_error(conn->ibc_hdev->ibh_ibdev,
1229 KIBLND_UNMAP_ADDR_SET(rx, rx_msgunmap, rx->rx_msgaddr);
1231 CDEBUG(D_NET,"rx %d: %p "LPX64"("LPX64")\n",
1232 i, rx->rx_msg, rx->rx_msgaddr,
1233 lnet_page2phys(pg) + pg_off);
1235 pg_off += IBLND_MSG_SIZE;
1236 LASSERT (pg_off <= PAGE_SIZE);
1238 if (pg_off == PAGE_SIZE) {
1241 LASSERT (ipg <= IBLND_RX_MSG_PAGES(conn->ibc_version));
1247 kiblnd_unmap_tx_pool(kib_tx_pool_t *tpo)
1249 kib_hca_dev_t *hdev = tpo->tpo_hdev;
1253 LASSERT (tpo->tpo_pool.po_allocated == 0);
1258 for (i = 0; i < tpo->tpo_pool.po_size; i++) {
1259 tx = &tpo->tpo_tx_descs[i];
1260 kiblnd_dma_unmap_single(hdev->ibh_ibdev,
1261 KIBLND_UNMAP_ADDR(tx, tx_msgunmap,
1263 IBLND_MSG_SIZE, DMA_TO_DEVICE);
1266 kiblnd_hdev_decref(hdev);
1267 tpo->tpo_hdev = NULL;
1270 static kib_hca_dev_t *
1271 kiblnd_current_hdev(kib_dev_t *dev)
1273 kib_hca_dev_t *hdev;
1274 unsigned long flags;
1277 cfs_read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1278 while (dev->ibd_failover) {
1279 cfs_read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1281 CDEBUG(D_NET, "Wait for dev(%s) failover\n", dev->ibd_ifname);
1282 cfs_schedule_timeout(cfs_time_seconds(1) / 100);
1284 cfs_read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1287 kiblnd_hdev_addref_locked(dev->ibd_hdev);
1288 hdev = dev->ibd_hdev;
1290 cfs_read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1296 kiblnd_map_tx_pool(kib_tx_pool_t *tpo)
1298 kib_pages_t *txpgs = tpo->tpo_tx_pages;
1299 kib_pool_t *pool = &tpo->tpo_pool;
1300 kib_net_t *net = pool->po_owner->ps_net;
1301 kib_dev_t *dev = net->ibn_dev;
1308 LASSERT (net != NULL);
1310 /* pre-mapped messages are not bigger than 1 page */
1311 CLASSERT (IBLND_MSG_SIZE <= PAGE_SIZE);
1313 /* No fancy arithmetic when we do the buffer calculations */
1314 CLASSERT (PAGE_SIZE % IBLND_MSG_SIZE == 0);
1316 tpo->tpo_hdev = kiblnd_current_hdev(dev);
1318 for (ipage = page_offset = i = 0; i < pool->po_size; i++) {
1319 page = txpgs->ibp_pages[ipage];
1320 tx = &tpo->tpo_tx_descs[i];
1322 tx->tx_msg = (kib_msg_t *)(((char *)page_address(page)) +
1325 tx->tx_msgaddr = kiblnd_dma_map_single(
1326 tpo->tpo_hdev->ibh_ibdev, tx->tx_msg,
1327 IBLND_MSG_SIZE, DMA_TO_DEVICE);
1328 LASSERT (!kiblnd_dma_mapping_error(tpo->tpo_hdev->ibh_ibdev,
1330 KIBLND_UNMAP_ADDR_SET(tx, tx_msgunmap, tx->tx_msgaddr);
1332 cfs_list_add(&tx->tx_list, &pool->po_free_list);
1334 page_offset += IBLND_MSG_SIZE;
1335 LASSERT (page_offset <= PAGE_SIZE);
1337 if (page_offset == PAGE_SIZE) {
1340 LASSERT (ipage <= txpgs->ibp_npages);
1346 kiblnd_find_dma_mr(kib_hca_dev_t *hdev, __u64 addr, __u64 size)
1350 LASSERT (hdev->ibh_mrs[0] != NULL);
1352 if (hdev->ibh_nmrs == 1)
1353 return hdev->ibh_mrs[0];
1355 index = addr >> hdev->ibh_mr_shift;
1357 if (index < hdev->ibh_nmrs &&
1358 index == ((addr + size - 1) >> hdev->ibh_mr_shift))
1359 return hdev->ibh_mrs[index];
1365 kiblnd_find_rd_dma_mr(kib_hca_dev_t *hdev, kib_rdma_desc_t *rd)
1367 struct ib_mr *prev_mr;
1371 LASSERT (hdev->ibh_mrs[0] != NULL);
1373 if (*kiblnd_tunables.kib_map_on_demand > 0 &&
1374 *kiblnd_tunables.kib_map_on_demand <= rd->rd_nfrags)
1377 if (hdev->ibh_nmrs == 1)
1378 return hdev->ibh_mrs[0];
1380 for (i = 0, mr = prev_mr = NULL;
1381 i < rd->rd_nfrags; i++) {
1382 mr = kiblnd_find_dma_mr(hdev,
1383 rd->rd_frags[i].rf_addr,
1384 rd->rd_frags[i].rf_nob);
1385 if (prev_mr == NULL)
1388 if (mr == NULL || prev_mr != mr) {
1389 /* Can't covered by one single MR */
1399 kiblnd_destroy_fmr_pool(kib_fmr_pool_t *pool)
1401 LASSERT (pool->fpo_map_count == 0);
1403 if (pool->fpo_fmr_pool != NULL)
1404 ib_destroy_fmr_pool(pool->fpo_fmr_pool);
1406 if (pool->fpo_hdev != NULL)
1407 kiblnd_hdev_decref(pool->fpo_hdev);
1409 LIBCFS_FREE(pool, sizeof(kib_fmr_pool_t));
1413 kiblnd_destroy_fmr_pool_list(cfs_list_t *head)
1415 kib_fmr_pool_t *pool;
1417 while (!cfs_list_empty(head)) {
1418 pool = cfs_list_entry(head->next, kib_fmr_pool_t, fpo_list);
1419 cfs_list_del(&pool->fpo_list);
1420 kiblnd_destroy_fmr_pool(pool);
1425 kiblnd_create_fmr_pool(kib_fmr_poolset_t *fps, kib_fmr_pool_t **pp_fpo)
1427 /* FMR pool for RDMA */
1428 kib_dev_t *dev = fps->fps_net->ibn_dev;
1429 kib_fmr_pool_t *fpo;
1430 struct ib_fmr_pool_param param = {
1431 .max_pages_per_fmr = LNET_MAX_PAYLOAD/PAGE_SIZE,
1432 .page_shift = PAGE_SHIFT,
1433 .access = (IB_ACCESS_LOCAL_WRITE |
1434 IB_ACCESS_REMOTE_WRITE),
1435 .pool_size = *kiblnd_tunables.kib_fmr_pool_size,
1436 .dirty_watermark = *kiblnd_tunables.kib_fmr_flush_trigger,
1437 .flush_function = NULL,
1439 .cache = !!*kiblnd_tunables.kib_fmr_cache};
1442 LIBCFS_ALLOC(fpo, sizeof(kib_fmr_pool_t));
1446 memset(fpo, 0, sizeof(kib_fmr_pool_t));
1447 fpo->fpo_hdev = kiblnd_current_hdev(dev);
1448 fpo->fpo_fmr_pool = ib_create_fmr_pool(fpo->fpo_hdev->ibh_pd, ¶m);
1449 if (IS_ERR(fpo->fpo_fmr_pool)) {
1450 CERROR("Failed to create FMR pool: %ld\n",
1451 PTR_ERR(fpo->fpo_fmr_pool));
1452 rc = PTR_ERR(fpo->fpo_fmr_pool);
1453 kiblnd_hdev_decref(fpo->fpo_hdev);
1454 LIBCFS_FREE(fpo, sizeof(kib_fmr_pool_t));
1458 fpo->fpo_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1459 fpo->fpo_owner = fps;
1466 kiblnd_fail_fmr_pool_set(kib_fmr_poolset_t *fps, cfs_list_t *zombies)
1468 cfs_spin_lock(&fps->fps_lock);
1470 while (!cfs_list_empty(&fps->fps_pool_list)) {
1471 kib_fmr_pool_t *fpo = cfs_list_entry(fps->fps_pool_list.next,
1472 kib_fmr_pool_t, fpo_list);
1473 fpo->fpo_failed = 1;
1474 cfs_list_del(&fpo->fpo_list);
1475 if (fpo->fpo_map_count == 0)
1476 cfs_list_add(&fpo->fpo_list, zombies);
1478 cfs_list_add(&fpo->fpo_list, &fps->fps_failed_pool_list);
1481 cfs_spin_unlock(&fps->fps_lock);
1485 kiblnd_fini_fmr_pool_set(kib_fmr_poolset_t *fps)
1487 kiblnd_destroy_fmr_pool_list(&fps->fps_failed_pool_list);
1488 kiblnd_destroy_fmr_pool_list(&fps->fps_pool_list);
1492 kiblnd_init_fmr_pool_set(kib_fmr_poolset_t *fps, kib_net_t *net)
1494 kib_fmr_pool_t *fpo;
1497 memset(fps, 0, sizeof(kib_fmr_poolset_t));
1500 cfs_spin_lock_init(&fps->fps_lock);
1501 CFS_INIT_LIST_HEAD(&fps->fps_pool_list);
1502 CFS_INIT_LIST_HEAD(&fps->fps_failed_pool_list);
1503 rc = kiblnd_create_fmr_pool(fps, &fpo);
1505 cfs_list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1511 kiblnd_fmr_pool_is_idle(kib_fmr_pool_t *fpo, cfs_time_t now)
1513 if (fpo->fpo_map_count != 0) /* still in use */
1515 if (fpo->fpo_failed)
1517 return cfs_time_aftereq(now, fpo->fpo_deadline);
1521 kiblnd_fmr_pool_unmap(kib_fmr_t *fmr, int status)
1523 CFS_LIST_HEAD (zombies);
1524 kib_fmr_pool_t *fpo = fmr->fmr_pool;
1525 kib_fmr_poolset_t *fps = fpo->fpo_owner;
1526 cfs_time_t now = cfs_time_current();
1527 kib_fmr_pool_t *tmp;
1530 rc = ib_fmr_pool_unmap(fmr->fmr_pfmr);
1534 rc = ib_flush_fmr_pool(fpo->fpo_fmr_pool);
1538 fmr->fmr_pool = NULL;
1539 fmr->fmr_pfmr = NULL;
1541 cfs_spin_lock(&fps->fps_lock);
1542 fpo->fpo_map_count --; /* decref the pool */
1544 cfs_list_for_each_entry_safe(fpo, tmp, &fps->fps_pool_list, fpo_list) {
1545 /* the first pool is persistent */
1546 if (fps->fps_pool_list.next == &fpo->fpo_list)
1549 if (kiblnd_fmr_pool_is_idle(fpo, now)) {
1550 cfs_list_move(&fpo->fpo_list, &zombies);
1551 fps->fps_version ++;
1554 cfs_spin_unlock(&fps->fps_lock);
1556 if (!cfs_list_empty(&zombies))
1557 kiblnd_destroy_fmr_pool_list(&zombies);
1561 kiblnd_fmr_pool_map(kib_fmr_poolset_t *fps, __u64 *pages, int npages,
1562 __u64 iov, kib_fmr_t *fmr)
1564 struct ib_pool_fmr *pfmr;
1565 kib_fmr_pool_t *fpo;
1569 LASSERT (fps->fps_net->ibn_with_fmr);
1571 cfs_spin_lock(&fps->fps_lock);
1572 version = fps->fps_version;
1573 cfs_list_for_each_entry(fpo, &fps->fps_pool_list, fpo_list) {
1574 fpo->fpo_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1575 fpo->fpo_map_count ++;
1576 cfs_spin_unlock(&fps->fps_lock);
1578 pfmr = ib_fmr_pool_map_phys(fpo->fpo_fmr_pool,
1579 pages, npages, iov);
1580 if (likely(!IS_ERR(pfmr))) {
1581 fmr->fmr_pool = fpo;
1582 fmr->fmr_pfmr = pfmr;
1586 cfs_spin_lock(&fps->fps_lock);
1587 fpo->fpo_map_count --;
1588 if (PTR_ERR(pfmr) != -EAGAIN) {
1589 cfs_spin_unlock(&fps->fps_lock);
1590 return PTR_ERR(pfmr);
1593 /* EAGAIN and ... */
1594 if (version != fps->fps_version) {
1595 cfs_spin_unlock(&fps->fps_lock);
1600 if (fps->fps_increasing) {
1601 cfs_spin_unlock(&fps->fps_lock);
1602 CDEBUG(D_NET, "Another thread is allocating new "
1603 "FMR pool, waiting for her to complete\n");
1609 if (cfs_time_before(cfs_time_current(), fps->fps_next_retry)) {
1610 /* someone failed recently */
1611 cfs_spin_unlock(&fps->fps_lock);
1615 fps->fps_increasing = 1;
1616 cfs_spin_unlock(&fps->fps_lock);
1618 CDEBUG(D_NET, "Allocate new FMR pool\n");
1619 rc = kiblnd_create_fmr_pool(fps, &fpo);
1620 cfs_spin_lock(&fps->fps_lock);
1621 fps->fps_increasing = 0;
1623 fps->fps_version ++;
1624 cfs_list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1626 fps->fps_next_retry = cfs_time_shift(10);
1628 cfs_spin_unlock(&fps->fps_lock);
1634 kiblnd_fini_pool(kib_pool_t *pool)
1636 LASSERT (cfs_list_empty(&pool->po_free_list));
1637 LASSERT (pool->po_allocated == 0);
1639 CDEBUG(D_NET, "Finalize %s pool\n", pool->po_owner->ps_name);
1643 kiblnd_init_pool(kib_poolset_t *ps, kib_pool_t *pool, int size)
1645 CDEBUG(D_NET, "Initialize %s pool\n", ps->ps_name);
1647 memset(pool, 0, sizeof(kib_pool_t));
1648 CFS_INIT_LIST_HEAD(&pool->po_free_list);
1649 pool->po_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1650 pool->po_owner = ps;
1651 pool->po_size = size;
1655 kiblnd_destroy_pool_list(cfs_list_t *head)
1659 while (!cfs_list_empty(head)) {
1660 pool = cfs_list_entry(head->next, kib_pool_t, po_list);
1661 cfs_list_del(&pool->po_list);
1663 LASSERT (pool->po_owner != NULL);
1664 pool->po_owner->ps_pool_destroy(pool);
1669 kiblnd_fail_pool_set(kib_poolset_t *ps, cfs_list_t *zombies)
1671 cfs_spin_lock(&ps->ps_lock);
1672 while (!cfs_list_empty(&ps->ps_pool_list)) {
1673 kib_pool_t *po = cfs_list_entry(ps->ps_pool_list.next,
1674 kib_pool_t, po_list);
1676 cfs_list_del(&po->po_list);
1677 if (po->po_allocated == 0)
1678 cfs_list_add(&po->po_list, zombies);
1680 cfs_list_add(&po->po_list, &ps->ps_failed_pool_list);
1682 cfs_spin_unlock(&ps->ps_lock);
1686 kiblnd_fini_pool_set(kib_poolset_t *ps)
1688 kiblnd_destroy_pool_list(&ps->ps_failed_pool_list);
1689 kiblnd_destroy_pool_list(&ps->ps_pool_list);
1693 kiblnd_init_pool_set(kib_poolset_t *ps, kib_net_t *net,
1694 char *name, int size,
1695 kib_ps_pool_create_t po_create,
1696 kib_ps_pool_destroy_t po_destroy,
1697 kib_ps_node_init_t nd_init,
1698 kib_ps_node_fini_t nd_fini)
1703 memset(ps, 0, sizeof(kib_poolset_t));
1706 ps->ps_pool_create = po_create;
1707 ps->ps_pool_destroy = po_destroy;
1708 ps->ps_node_init = nd_init;
1709 ps->ps_node_fini = nd_fini;
1710 ps->ps_pool_size = size;
1711 strncpy(ps->ps_name, name, IBLND_POOL_NAME_LEN);
1712 cfs_spin_lock_init(&ps->ps_lock);
1713 CFS_INIT_LIST_HEAD(&ps->ps_pool_list);
1714 CFS_INIT_LIST_HEAD(&ps->ps_failed_pool_list);
1716 rc = ps->ps_pool_create(ps, size, &pool);
1718 cfs_list_add(&pool->po_list, &ps->ps_pool_list);
1720 CERROR("Failed to create the first pool for %s\n", ps->ps_name);
1726 kiblnd_pool_is_idle(kib_pool_t *pool, cfs_time_t now)
1728 if (pool->po_allocated != 0) /* still in use */
1730 if (pool->po_failed)
1732 return cfs_time_aftereq(now, pool->po_deadline);
1736 kiblnd_pool_free_node(kib_pool_t *pool, cfs_list_t *node)
1738 CFS_LIST_HEAD (zombies);
1739 kib_poolset_t *ps = pool->po_owner;
1741 cfs_time_t now = cfs_time_current();
1743 cfs_spin_lock(&ps->ps_lock);
1745 if (ps->ps_node_fini != NULL)
1746 ps->ps_node_fini(pool, node);
1748 LASSERT (pool->po_allocated > 0);
1749 cfs_list_add(node, &pool->po_free_list);
1750 pool->po_allocated --;
1752 cfs_list_for_each_entry_safe(pool, tmp, &ps->ps_pool_list, po_list) {
1753 /* the first pool is persistent */
1754 if (ps->ps_pool_list.next == &pool->po_list)
1757 if (kiblnd_pool_is_idle(pool, now))
1758 cfs_list_move(&pool->po_list, &zombies);
1760 cfs_spin_unlock(&ps->ps_lock);
1762 if (!cfs_list_empty(&zombies))
1763 kiblnd_destroy_pool_list(&zombies);
1767 kiblnd_pool_alloc_node(kib_poolset_t *ps)
1774 cfs_spin_lock(&ps->ps_lock);
1775 cfs_list_for_each_entry(pool, &ps->ps_pool_list, po_list) {
1776 if (cfs_list_empty(&pool->po_free_list))
1779 pool->po_allocated ++;
1780 pool->po_deadline = cfs_time_shift(IBLND_POOL_DEADLINE);
1781 node = pool->po_free_list.next;
1784 if (ps->ps_node_init != NULL) {
1785 /* still hold the lock */
1786 ps->ps_node_init(pool, node);
1788 cfs_spin_unlock(&ps->ps_lock);
1792 /* no available tx pool and ... */
1793 if (ps->ps_increasing) {
1794 /* another thread is allocating a new pool */
1795 cfs_spin_unlock(&ps->ps_lock);
1796 CDEBUG(D_NET, "Another thread is allocating new "
1797 "%s pool, waiting for her to complete\n",
1803 if (cfs_time_before(cfs_time_current(), ps->ps_next_retry)) {
1804 /* someone failed recently */
1805 cfs_spin_unlock(&ps->ps_lock);
1809 ps->ps_increasing = 1;
1810 cfs_spin_unlock(&ps->ps_lock);
1812 CDEBUG(D_NET, "%s pool exhausted, allocate new pool\n", ps->ps_name);
1814 rc = ps->ps_pool_create(ps, ps->ps_pool_size, &pool);
1816 cfs_spin_lock(&ps->ps_lock);
1817 ps->ps_increasing = 0;
1819 cfs_list_add_tail(&pool->po_list, &ps->ps_pool_list);
1821 /* retry 10 seconds later */
1822 ps->ps_next_retry = cfs_time_shift(10);
1823 CERROR("Can't allocate new %s pool because out of memory\n",
1826 cfs_spin_unlock(&ps->ps_lock);
1832 kiblnd_pmr_pool_unmap(kib_phys_mr_t *pmr)
1834 kib_pmr_pool_t *ppo = pmr->pmr_pool;
1835 struct ib_mr *mr = pmr->pmr_mr;
1838 kiblnd_pool_free_node(&ppo->ppo_pool, &pmr->pmr_list);
1844 kiblnd_pmr_pool_map(kib_pmr_poolset_t *pps, kib_hca_dev_t *hdev,
1845 kib_rdma_desc_t *rd, __u64 *iova, kib_phys_mr_t **pp_pmr)
1852 node = kiblnd_pool_alloc_node(&pps->pps_poolset);
1854 CERROR("Failed to allocate PMR descriptor\n");
1858 pmr = container_of(node, kib_phys_mr_t, pmr_list);
1859 if (pmr->pmr_pool->ppo_hdev != hdev) {
1860 kiblnd_pool_free_node(&pmr->pmr_pool->ppo_pool, node);
1864 for (i = 0; i < rd->rd_nfrags; i ++) {
1865 pmr->pmr_ipb[i].addr = rd->rd_frags[i].rf_addr;
1866 pmr->pmr_ipb[i].size = rd->rd_frags[i].rf_nob;
1869 pmr->pmr_mr = ib_reg_phys_mr(hdev->ibh_pd,
1870 pmr->pmr_ipb, rd->rd_nfrags,
1871 IB_ACCESS_LOCAL_WRITE |
1872 IB_ACCESS_REMOTE_WRITE,
1874 if (!IS_ERR(pmr->pmr_mr)) {
1875 pmr->pmr_iova = *iova;
1880 rc = PTR_ERR(pmr->pmr_mr);
1881 CERROR("Failed ib_reg_phys_mr: %d\n", rc);
1884 kiblnd_pool_free_node(&pmr->pmr_pool->ppo_pool, node);
1890 kiblnd_destroy_pmr_pool(kib_pool_t *pool)
1892 kib_pmr_pool_t *ppo = container_of(pool, kib_pmr_pool_t, ppo_pool);
1895 LASSERT (pool->po_allocated == 0);
1897 while (!cfs_list_empty(&pool->po_free_list)) {
1898 pmr = cfs_list_entry(pool->po_free_list.next,
1899 kib_phys_mr_t, pmr_list);
1901 LASSERT (pmr->pmr_mr == NULL);
1902 cfs_list_del(&pmr->pmr_list);
1904 if (pmr->pmr_ipb != NULL) {
1905 LIBCFS_FREE(pmr->pmr_ipb,
1906 IBLND_MAX_RDMA_FRAGS *
1907 sizeof(struct ib_phys_buf));
1910 LIBCFS_FREE(pmr, sizeof(kib_phys_mr_t));
1913 kiblnd_fini_pool(pool);
1914 if (ppo->ppo_hdev != NULL)
1915 kiblnd_hdev_decref(ppo->ppo_hdev);
1917 LIBCFS_FREE(ppo, sizeof(kib_pmr_pool_t));
1921 kiblnd_create_pmr_pool(kib_poolset_t *ps, int size, kib_pool_t **pp_po)
1923 kib_pmr_pool_t *ppo;
1928 LIBCFS_ALLOC(ppo, sizeof(kib_pmr_pool_t));
1930 CERROR("Failed to allocate PMR pool\n");
1934 pool = &ppo->ppo_pool;
1935 kiblnd_init_pool(ps, pool, size);
1937 for (i = 0; i < size; i++) {
1938 LIBCFS_ALLOC(pmr, sizeof(kib_phys_mr_t));
1942 memset(pmr, 0, sizeof(kib_phys_mr_t));
1943 pmr->pmr_pool = ppo;
1944 LIBCFS_ALLOC(pmr->pmr_ipb,
1945 IBLND_MAX_RDMA_FRAGS *
1946 sizeof(struct ib_phys_buf));
1947 if (pmr->pmr_ipb == NULL)
1950 cfs_list_add(&pmr->pmr_list, &pool->po_free_list);
1954 ps->ps_pool_destroy(pool);
1958 ppo->ppo_hdev = kiblnd_current_hdev(ps->ps_net->ibn_dev);
1964 kiblnd_destroy_tx_pool(kib_pool_t *pool)
1966 kib_tx_pool_t *tpo = container_of(pool, kib_tx_pool_t, tpo_pool);
1969 LASSERT (pool->po_allocated == 0);
1971 if (tpo->tpo_tx_pages != NULL) {
1972 kiblnd_unmap_tx_pool(tpo);
1973 kiblnd_free_pages(tpo->tpo_tx_pages);
1976 if (tpo->tpo_tx_descs == NULL)
1979 for (i = 0; i < pool->po_size; i++) {
1980 kib_tx_t *tx = &tpo->tpo_tx_descs[i];
1982 cfs_list_del(&tx->tx_list);
1983 if (tx->tx_pages != NULL)
1984 LIBCFS_FREE(tx->tx_pages,
1986 sizeof(*tx->tx_pages));
1987 if (tx->tx_frags != NULL)
1988 LIBCFS_FREE(tx->tx_frags,
1989 IBLND_MAX_RDMA_FRAGS *
1990 sizeof(*tx->tx_frags));
1991 if (tx->tx_wrq != NULL)
1992 LIBCFS_FREE(tx->tx_wrq,
1993 (1 + IBLND_MAX_RDMA_FRAGS) *
1994 sizeof(*tx->tx_wrq));
1995 if (tx->tx_sge != NULL)
1996 LIBCFS_FREE(tx->tx_sge,
1997 (1 + IBLND_MAX_RDMA_FRAGS) *
1998 sizeof(*tx->tx_sge));
1999 if (tx->tx_rd != NULL)
2000 LIBCFS_FREE(tx->tx_rd,
2001 offsetof(kib_rdma_desc_t,
2002 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2005 LIBCFS_FREE(tpo->tpo_tx_descs,
2006 pool->po_size * sizeof(kib_tx_t));
2008 kiblnd_fini_pool(pool);
2009 LIBCFS_FREE(tpo, sizeof(kib_tx_pool_t));
2013 kiblnd_create_tx_pool(kib_poolset_t *ps, int size, kib_pool_t **pp_po)
2020 LIBCFS_ALLOC(tpo, sizeof(kib_tx_pool_t));
2022 CERROR("Failed to allocate TX pool\n");
2026 pool = &tpo->tpo_pool;
2027 kiblnd_init_pool(ps, pool, size);
2028 tpo->tpo_tx_descs = NULL;
2029 tpo->tpo_tx_pages = NULL;
2031 npg = (size * IBLND_MSG_SIZE + PAGE_SIZE - 1) / PAGE_SIZE;
2032 if (kiblnd_alloc_pages(&tpo->tpo_tx_pages, npg) != 0) {
2033 CERROR("Can't allocate tx pages: %d\n", npg);
2034 LIBCFS_FREE(tpo, sizeof(kib_tx_pool_t));
2038 LIBCFS_ALLOC (tpo->tpo_tx_descs, size * sizeof(kib_tx_t));
2039 if (tpo->tpo_tx_descs == NULL) {
2040 CERROR("Can't allocate %d tx descriptors\n", size);
2041 ps->ps_pool_destroy(pool);
2045 memset(tpo->tpo_tx_descs, 0, size * sizeof(kib_tx_t));
2047 for (i = 0; i < size; i++) {
2048 kib_tx_t *tx = &tpo->tpo_tx_descs[i];
2051 if (ps->ps_net->ibn_with_fmr){
2052 LIBCFS_ALLOC(tx->tx_pages, LNET_MAX_IOV *
2053 sizeof(*tx->tx_pages));
2054 if (tx->tx_pages == NULL)
2058 LIBCFS_ALLOC(tx->tx_frags,
2059 IBLND_MAX_RDMA_FRAGS *
2060 sizeof(*tx->tx_frags));
2061 if (tx->tx_frags == NULL)
2064 LIBCFS_ALLOC(tx->tx_wrq,
2065 (1 + IBLND_MAX_RDMA_FRAGS) *
2066 sizeof(*tx->tx_wrq));
2067 if (tx->tx_wrq == NULL)
2070 LIBCFS_ALLOC(tx->tx_sge,
2071 (1 + IBLND_MAX_RDMA_FRAGS) *
2072 sizeof(*tx->tx_sge));
2073 if (tx->tx_sge == NULL)
2076 LIBCFS_ALLOC(tx->tx_rd,
2077 offsetof(kib_rdma_desc_t,
2078 rd_frags[IBLND_MAX_RDMA_FRAGS]));
2079 if (tx->tx_rd == NULL)
2084 kiblnd_map_tx_pool(tpo);
2089 ps->ps_pool_destroy(pool);
2094 kiblnd_tx_init(kib_pool_t *pool, cfs_list_t *node)
2096 kib_tx_poolset_t *tps = container_of(pool->po_owner, kib_tx_poolset_t,
2098 kib_tx_t *tx = cfs_list_entry(node, kib_tx_t, tx_list);
2100 tx->tx_cookie = tps->tps_next_tx_cookie ++;
2104 kiblnd_ni_fini_pools(kib_net_t *net)
2106 kiblnd_fini_pool_set(&net->ibn_tx_ps.tps_poolset);
2107 if (net->ibn_with_fmr)
2108 kiblnd_fini_fmr_pool_set(&net->ibn_fmr_ps);
2109 else if (net->ibn_with_pmr)
2110 kiblnd_fini_pool_set(&net->ibn_pmr_ps.pps_poolset);
2114 kiblnd_net_init_pools(kib_net_t *net)
2116 kib_fmr_poolset_t *fps = &net->ibn_fmr_ps;
2117 kib_pmr_poolset_t *pps = &net->ibn_pmr_ps;
2118 kib_tx_poolset_t *tps = &net->ibn_tx_ps;
2119 unsigned long flags;
2122 if (*kiblnd_tunables.kib_fmr_pool_size <
2123 *kiblnd_tunables.kib_ntx / 4) {
2124 CERROR("Can't set fmr pool size (%d) < ntx / 4(%d)\n",
2125 *kiblnd_tunables.kib_fmr_pool_size,
2126 *kiblnd_tunables.kib_ntx / 4);
2130 if (*kiblnd_tunables.kib_pmr_pool_size <
2131 *kiblnd_tunables.kib_ntx / 4) {
2132 CERROR("Can't set pmr pool size (%d) < ntx / 4(%d)\n",
2133 *kiblnd_tunables.kib_pmr_pool_size,
2134 *kiblnd_tunables.kib_ntx / 4);
2138 cfs_read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2139 if (*kiblnd_tunables.kib_map_on_demand > 0 ||
2140 net->ibn_dev->ibd_hdev->ibh_nmrs > 1) {
2141 /* premapping can fail if ibd_nmr > 1, so we always create
2142 * FMR/PMR pool and map-on-demand if premapping failed */
2143 cfs_read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2144 rc = kiblnd_init_fmr_pool_set(fps, net);
2146 net->ibn_with_fmr = 1;
2147 } else if (rc == -ENOSYS) {
2148 rc = kiblnd_init_pool_set(&pps->pps_poolset, net, "PMR",
2149 *kiblnd_tunables.kib_pmr_pool_size,
2150 kiblnd_create_pmr_pool,
2151 kiblnd_destroy_pmr_pool,
2154 net->ibn_with_pmr = 1;
2159 cfs_read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2162 rc = kiblnd_init_pool_set(&tps->tps_poolset, net, "TX", IBLND_TX_MSGS(),
2163 kiblnd_create_tx_pool, kiblnd_destroy_tx_pool,
2164 kiblnd_tx_init, NULL);
2168 if (net->ibn_with_fmr)
2169 kiblnd_fini_fmr_pool_set(fps);
2170 else if (net->ibn_with_pmr)
2171 kiblnd_fini_pool_set(&pps->pps_poolset);
2177 kiblnd_hdev_get_attr(kib_hca_dev_t *hdev)
2179 struct ib_device_attr *attr;
2182 /* It's safe to assume a HCA can handle a page size
2183 * matching that of the native system */
2184 hdev->ibh_page_shift = PAGE_SHIFT;
2185 hdev->ibh_page_size = 1 << PAGE_SHIFT;
2186 hdev->ibh_page_mask = ~((__u64)hdev->ibh_page_size - 1);
2188 LIBCFS_ALLOC(attr, sizeof(*attr));
2190 CERROR("Out of memory\n");
2194 rc = ib_query_device(hdev->ibh_ibdev, attr);
2196 hdev->ibh_mr_size = attr->max_mr_size;
2198 LIBCFS_FREE(attr, sizeof(*attr));
2201 CERROR("Failed to query IB device: %d\n", rc);
2205 #ifdef HAVE_OFED_TRANSPORT_IWARP
2206 /* XXX We can't trust this value returned by Chelsio driver, it's wrong
2207 * and we have reported the bug, remove these in the future when Chelsio
2209 if (rdma_node_get_transport(hdev->ibh_ibdev->node_type) ==
2210 RDMA_TRANSPORT_IWARP)
2211 hdev->ibh_mr_size = (1ULL << 32) - 1;
2214 if (hdev->ibh_mr_size == ~0ULL) {
2215 hdev->ibh_mr_shift = 64;
2219 for (hdev->ibh_mr_shift = 0;
2220 hdev->ibh_mr_shift < 64; hdev->ibh_mr_shift ++) {
2221 if (hdev->ibh_mr_size == (1ULL << hdev->ibh_mr_shift) ||
2222 hdev->ibh_mr_size == (1ULL << hdev->ibh_mr_shift) - 1)
2226 CERROR("Invalid mr size: "LPX64"\n", hdev->ibh_mr_size);
2231 kiblnd_hdev_cleanup_mrs(kib_hca_dev_t *hdev)
2235 if (hdev->ibh_nmrs == 0 || hdev->ibh_mrs == NULL)
2238 for (i = 0; i < hdev->ibh_nmrs; i++) {
2239 if (hdev->ibh_mrs[i] == NULL)
2242 ib_dereg_mr(hdev->ibh_mrs[i]);
2245 LIBCFS_FREE(hdev->ibh_mrs, sizeof(*hdev->ibh_mrs) * hdev->ibh_nmrs);
2246 hdev->ibh_mrs = NULL;
2251 kiblnd_hdev_destroy(kib_hca_dev_t *hdev)
2253 kiblnd_hdev_cleanup_mrs(hdev);
2255 if (hdev->ibh_pd != NULL)
2256 ib_dealloc_pd(hdev->ibh_pd);
2258 if (hdev->ibh_cmid != NULL)
2259 rdma_destroy_id(hdev->ibh_cmid);
2261 LIBCFS_FREE(hdev, sizeof(*hdev));
2265 kiblnd_hdev_setup_mrs(kib_hca_dev_t *hdev)
2272 int acflags = IB_ACCESS_LOCAL_WRITE |
2273 IB_ACCESS_REMOTE_WRITE;
2275 rc = kiblnd_hdev_get_attr(hdev);
2279 if (hdev->ibh_mr_shift == 64) {
2280 LIBCFS_ALLOC(hdev->ibh_mrs, 1 * sizeof(*hdev->ibh_mrs));
2281 if (hdev->ibh_mrs == NULL) {
2282 CERROR("Failed to allocate MRs table\n");
2286 hdev->ibh_mrs[0] = NULL;
2289 mr = ib_get_dma_mr(hdev->ibh_pd, acflags);
2291 CERROR("Failed ib_get_dma_mr : %ld\n", PTR_ERR(mr));
2292 kiblnd_hdev_cleanup_mrs(hdev);
2296 hdev->ibh_mrs[0] = mr;
2301 mr_size = (1ULL << hdev->ibh_mr_shift);
2302 mm_size = (unsigned long)high_memory - PAGE_OFFSET;
2304 hdev->ibh_nmrs = (int)((mm_size + mr_size - 1) >> hdev->ibh_mr_shift);
2306 if (hdev->ibh_mr_shift < 32 || hdev->ibh_nmrs > 1024) {
2307 /* it's 4T..., assume we will re-code at that time */
2308 CERROR("Can't support memory size: x"LPX64
2309 " with MR size: x"LPX64"\n", mm_size, mr_size);
2313 /* create an array of MRs to cover all memory */
2314 LIBCFS_ALLOC(hdev->ibh_mrs, sizeof(*hdev->ibh_mrs) * hdev->ibh_nmrs);
2315 if (hdev->ibh_mrs == NULL) {
2316 CERROR("Failed to allocate MRs' table\n");
2320 memset(hdev->ibh_mrs, 0, sizeof(*hdev->ibh_mrs) * hdev->ibh_nmrs);
2322 for (i = 0; i < hdev->ibh_nmrs; i++) {
2323 struct ib_phys_buf ipb;
2326 ipb.size = hdev->ibh_mr_size;
2327 ipb.addr = i * mr_size;
2330 mr = ib_reg_phys_mr(hdev->ibh_pd, &ipb, 1, acflags, &iova);
2332 CERROR("Failed ib_reg_phys_mr addr "LPX64
2333 " size "LPX64" : %ld\n",
2334 ipb.addr, ipb.size, PTR_ERR(mr));
2335 kiblnd_hdev_cleanup_mrs(hdev);
2339 LASSERT (iova == ipb.addr);
2341 hdev->ibh_mrs[i] = mr;
2345 CDEBUG(D_CONSOLE, "Register global MR array, MR size: "
2346 LPX64", array size: %d\n",
2347 hdev->ibh_mr_size, hdev->ibh_nmrs);
2352 kiblnd_dummy_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event)
2358 kiblnd_dev_need_failover(kib_dev_t *dev)
2360 struct rdma_cm_id *cmid;
2361 struct sockaddr_in srcaddr;
2362 struct sockaddr_in dstaddr;
2365 if (dev->ibd_hdev == NULL || /* initializing */
2366 dev->ibd_hdev->ibh_cmid == NULL || /* listener is dead */
2367 *kiblnd_tunables.kib_dev_failover > 1) /* debugging */
2370 /* XXX: it's UGLY, but I don't have better way to find
2371 * ib-bonding HCA failover because:
2373 * a. no reliable CM event for HCA failover...
2374 * b. no OFED API to get ib_device for current net_device...
2376 * We have only two choices at this point:
2378 * a. rdma_bind_addr(), it will conflict with listener cmid
2379 * b. rdma_resolve_addr() to zero addr */
2380 cmid = rdma_create_id(kiblnd_dummy_callback,
2384 CERROR("Failed to create cmid for failover: %d\n", rc);
2388 memset(&srcaddr, 0, sizeof(srcaddr));
2389 srcaddr.sin_family = AF_INET;
2390 srcaddr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2392 memset(&dstaddr, 0, sizeof(dstaddr));
2393 dstaddr.sin_family = AF_INET;
2394 rc = rdma_resolve_addr(cmid, (struct sockaddr *)&srcaddr,
2395 (struct sockaddr *)&dstaddr, 1);
2397 CERROR("Failed to bind %s to device: %d\n",
2398 dev->ibd_ifname, rc);
2399 rdma_destroy_id(cmid);
2403 LASSERT (cmid->device != NULL);
2404 if (dev->ibd_hdev->ibh_ibdev == cmid->device) {
2405 /* don't need device failover */
2406 rdma_destroy_id(cmid);
2414 kiblnd_dev_failover(kib_dev_t *dev)
2416 CFS_LIST_HEAD (zombie_tpo);
2417 CFS_LIST_HEAD (zombie_ppo);
2418 CFS_LIST_HEAD (zombie_fpo);
2419 struct rdma_cm_id *cmid = NULL;
2420 kib_hca_dev_t *hdev = NULL;
2424 struct sockaddr_in addr;
2425 unsigned long flags;
2428 LASSERT (*kiblnd_tunables.kib_dev_failover > 1 ||
2429 dev->ibd_can_failover ||
2430 dev->ibd_hdev == NULL);
2432 rc = kiblnd_dev_need_failover(dev);
2436 if (dev->ibd_hdev != NULL &&
2437 dev->ibd_hdev->ibh_cmid != NULL) {
2438 /* XXX it's not good to close old listener at here,
2439 * because we can fail to create new listener.
2440 * But we have to close it now, otherwise rdma_bind_addr
2441 * will return EADDRINUSE... How crap! */
2442 cfs_write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2444 cmid = dev->ibd_hdev->ibh_cmid;
2445 /* make next schedule of kiblnd_dev_need_failover
2446 * will return 1 for me */
2447 dev->ibd_hdev->ibh_cmid = NULL;
2448 cfs_write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2450 rdma_destroy_id(cmid);
2453 cmid = rdma_create_id(kiblnd_cm_callback, dev, RDMA_PS_TCP);
2456 CERROR("Failed to create cmid for failover: %d\n", rc);
2460 memset(&addr, 0, sizeof(addr));
2461 addr.sin_family = AF_INET;
2462 addr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2463 addr.sin_port = htons(*kiblnd_tunables.kib_service);
2465 /* Bind to failover device or port */
2466 rc = rdma_bind_addr(cmid, (struct sockaddr *)&addr);
2468 CERROR("Failed to bind %s to device: %d\n",
2469 dev->ibd_ifname, rc);
2470 rdma_destroy_id(cmid);
2474 LIBCFS_ALLOC(hdev, sizeof(*hdev));
2476 CERROR("Failed to allocate kib_hca_dev\n");
2477 rdma_destroy_id(cmid);
2481 memset(hdev, 0, sizeof(*hdev));
2482 atomic_set(&hdev->ibh_ref, 1);
2483 hdev->ibh_dev = dev;
2484 hdev->ibh_cmid = cmid;
2485 hdev->ibh_ibdev = cmid->device;
2487 pd = ib_alloc_pd(cmid->device);
2490 CERROR("Can't allocate PD: %d\n", rc);
2496 rc = rdma_listen(cmid, 0);
2498 CERROR("Can't start new listener: %d\n", rc);
2502 rc = kiblnd_hdev_setup_mrs(hdev);
2504 CERROR("Can't setup device: %d\n", rc);
2508 cfs_write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2510 old = dev->ibd_hdev;
2511 dev->ibd_hdev = hdev; /* take over the refcount */
2514 cfs_list_for_each_entry(net, &dev->ibd_nets, ibn_list) {
2515 kiblnd_fail_pool_set(&net->ibn_tx_ps.tps_poolset, &zombie_tpo);
2516 if (net->ibn_with_pmr)
2517 kiblnd_fail_pool_set(&net->ibn_pmr_ps.pps_poolset, &zombie_ppo);
2518 if (net->ibn_with_fmr)
2519 kiblnd_fail_fmr_pool_set(&net->ibn_fmr_ps, &zombie_fpo);
2522 cfs_write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2524 if (!cfs_list_empty(&zombie_tpo))
2525 kiblnd_destroy_pool_list(&zombie_tpo);
2526 if (!cfs_list_empty(&zombie_ppo))
2527 kiblnd_destroy_pool_list(&zombie_ppo);
2528 if (!cfs_list_empty(&zombie_fpo))
2529 kiblnd_destroy_fmr_pool_list(&zombie_fpo);
2531 kiblnd_hdev_decref(hdev);
2534 dev->ibd_failed_failover++;
2536 dev->ibd_failed_failover = 0;
2542 kiblnd_destroy_dev (kib_dev_t *dev)
2544 LASSERT (dev->ibd_nnets == 0);
2545 LASSERT (cfs_list_empty(&dev->ibd_nets));
2547 cfs_list_del(&dev->ibd_fail_list);
2548 cfs_list_del(&dev->ibd_list);
2550 if (dev->ibd_hdev != NULL)
2551 kiblnd_hdev_decref(dev->ibd_hdev);
2553 LIBCFS_FREE(dev, sizeof(*dev));
2557 kiblnd_create_dev(char *ifname)
2559 struct net_device *netdev;
2566 rc = libcfs_ipif_query(ifname, &up, &ip, &netmask);
2568 CERROR("Can't query IPoIB interface %s: %d\n",
2574 CERROR("Can't query IPoIB interface %s: it's down\n", ifname);
2578 LIBCFS_ALLOC(dev, sizeof(*dev));
2582 memset(dev, 0, sizeof(*dev));
2583 #ifdef HAVE_DEV_GET_BY_NAME_2ARG
2584 if ((netdev = dev_get_by_name(&init_net, ifname)) == NULL) {
2586 if ((netdev = dev_get_by_name(ifname)) == NULL) {
2588 CERROR("Can't find netdev of IF: %s\n", ifname);
2589 LIBCFS_FREE(dev, sizeof(*dev));
2593 dev->ibd_can_failover = !!(netdev->flags & IFF_MASTER);
2596 CFS_INIT_LIST_HEAD(&dev->ibd_nets);
2597 CFS_INIT_LIST_HEAD(&dev->ibd_list); /* not yet in kib_devs */
2598 CFS_INIT_LIST_HEAD(&dev->ibd_fail_list);
2600 strcpy(&dev->ibd_ifname[0], ifname);
2602 /* initialize the device */
2603 rc = kiblnd_dev_failover(dev);
2605 CERROR("Can't initialize device: %d\n", rc);
2606 LIBCFS_FREE(dev, sizeof(*dev));
2610 cfs_list_add_tail(&dev->ibd_list,
2611 &kiblnd_data.kib_devs);
2616 kiblnd_base_shutdown (void)
2620 LASSERT (cfs_list_empty(&kiblnd_data.kib_devs));
2622 CDEBUG(D_MALLOC, "before LND base cleanup: kmem %d\n",
2623 cfs_atomic_read(&libcfs_kmemory));
2625 switch (kiblnd_data.kib_init) {
2629 case IBLND_INIT_ALL:
2630 case IBLND_INIT_DATA:
2631 LASSERT (kiblnd_data.kib_peers != NULL);
2632 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) {
2633 LASSERT (cfs_list_empty(&kiblnd_data.kib_peers[i]));
2635 LASSERT (cfs_list_empty(&kiblnd_data.kib_connd_zombies));
2636 LASSERT (cfs_list_empty(&kiblnd_data.kib_connd_conns));
2638 /* flag threads to terminate; wake and wait for them to die */
2639 kiblnd_data.kib_shutdown = 1;
2640 cfs_waitq_broadcast(&kiblnd_data.kib_sched_waitq);
2641 cfs_waitq_broadcast(&kiblnd_data.kib_connd_waitq);
2642 cfs_waitq_broadcast(&kiblnd_data.kib_failover_waitq);
2645 while (cfs_atomic_read(&kiblnd_data.kib_nthreads) != 0) {
2647 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
2648 "Waiting for %d threads to terminate\n",
2649 cfs_atomic_read(&kiblnd_data.kib_nthreads));
2650 cfs_pause(cfs_time_seconds(1));
2655 case IBLND_INIT_NOTHING:
2659 if (kiblnd_data.kib_peers != NULL)
2660 LIBCFS_FREE(kiblnd_data.kib_peers,
2661 sizeof(cfs_list_t) *
2662 kiblnd_data.kib_peer_hash_size);
2664 CDEBUG(D_MALLOC, "after LND base cleanup: kmem %d\n",
2665 cfs_atomic_read(&libcfs_kmemory));
2667 kiblnd_data.kib_init = IBLND_INIT_NOTHING;
2668 PORTAL_MODULE_UNUSE;
2672 kiblnd_shutdown (lnet_ni_t *ni)
2674 kib_net_t *net = ni->ni_data;
2675 cfs_rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2677 unsigned long flags;
2679 LASSERT(kiblnd_data.kib_init == IBLND_INIT_ALL);
2684 CDEBUG(D_MALLOC, "before LND net cleanup: kmem %d\n",
2685 cfs_atomic_read(&libcfs_kmemory));
2687 cfs_write_lock_irqsave(g_lock, flags);
2688 net->ibn_shutdown = 1;
2689 cfs_write_unlock_irqrestore(g_lock, flags);
2691 switch (net->ibn_init) {
2695 case IBLND_INIT_ALL:
2696 /* nuke all existing peers within this net */
2697 kiblnd_del_peer(ni, LNET_NID_ANY);
2699 /* Wait for all peer state to clean up */
2701 while (cfs_atomic_read(&net->ibn_npeers) != 0) {
2703 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* 2**n? */
2704 "%s: waiting for %d peers to disconnect\n",
2705 libcfs_nid2str(ni->ni_nid),
2706 cfs_atomic_read(&net->ibn_npeers));
2707 cfs_pause(cfs_time_seconds(1));
2710 kiblnd_ni_fini_pools(net);
2712 cfs_write_lock_irqsave(g_lock, flags);
2713 LASSERT (net->ibn_dev->ibd_nnets > 0);
2714 net->ibn_dev->ibd_nnets--;
2715 cfs_list_del(&net->ibn_list);
2716 cfs_write_unlock_irqrestore(g_lock, flags);
2720 case IBLND_INIT_NOTHING:
2721 LASSERT (cfs_atomic_read(&net->ibn_nconns) == 0);
2723 if (net->ibn_dev != NULL &&
2724 net->ibn_dev->ibd_nnets == 0)
2725 kiblnd_destroy_dev(net->ibn_dev);
2730 CDEBUG(D_MALLOC, "after LND net cleanup: kmem %d\n",
2731 cfs_atomic_read(&libcfs_kmemory));
2733 net->ibn_init = IBLND_INIT_NOTHING;
2736 LIBCFS_FREE(net, sizeof(*net));
2739 if (cfs_list_empty(&kiblnd_data.kib_devs))
2740 kiblnd_base_shutdown();
2745 kiblnd_base_startup (void)
2750 LASSERT (kiblnd_data.kib_init == IBLND_INIT_NOTHING);
2753 memset(&kiblnd_data, 0, sizeof(kiblnd_data)); /* zero pointers, flags etc */
2755 cfs_rwlock_init(&kiblnd_data.kib_global_lock);
2757 CFS_INIT_LIST_HEAD(&kiblnd_data.kib_devs);
2758 CFS_INIT_LIST_HEAD(&kiblnd_data.kib_failed_devs);
2760 kiblnd_data.kib_peer_hash_size = IBLND_PEER_HASH_SIZE;
2761 LIBCFS_ALLOC(kiblnd_data.kib_peers,
2762 sizeof(cfs_list_t) *
2763 kiblnd_data.kib_peer_hash_size);
2764 if (kiblnd_data.kib_peers == NULL) {
2767 for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++)
2768 CFS_INIT_LIST_HEAD(&kiblnd_data.kib_peers[i]);
2770 cfs_spin_lock_init(&kiblnd_data.kib_connd_lock);
2771 CFS_INIT_LIST_HEAD(&kiblnd_data.kib_connd_conns);
2772 CFS_INIT_LIST_HEAD(&kiblnd_data.kib_connd_zombies);
2773 cfs_waitq_init(&kiblnd_data.kib_connd_waitq);
2775 cfs_spin_lock_init(&kiblnd_data.kib_sched_lock);
2776 CFS_INIT_LIST_HEAD(&kiblnd_data.kib_sched_conns);
2777 cfs_waitq_init(&kiblnd_data.kib_sched_waitq);
2778 cfs_waitq_init(&kiblnd_data.kib_failover_waitq);
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 for (i = 0; i < IBLND_N_SCHED; i++) {
2787 rc = kiblnd_thread_start(kiblnd_scheduler, (void *)((long)i));
2789 CERROR("Can't spawn o2iblnd scheduler[%d]: %d\n",
2795 rc = kiblnd_thread_start(kiblnd_connd, NULL);
2797 CERROR("Can't spawn o2iblnd connd: %d\n", rc);
2801 if (*kiblnd_tunables.kib_dev_failover != 0)
2802 rc = kiblnd_thread_start(kiblnd_failover_thread, NULL);
2805 CERROR("Can't spawn o2iblnd failover thread: %d\n", rc);
2809 /* flag everything initialised */
2810 kiblnd_data.kib_init = IBLND_INIT_ALL;
2811 /*****************************************************/
2816 kiblnd_base_shutdown();
2821 kiblnd_startup (lnet_ni_t *ni)
2824 kib_dev_t *ibdev = NULL;
2828 unsigned long flags;
2831 LASSERT (ni->ni_lnd == &the_o2iblnd);
2833 if (kiblnd_data.kib_init == IBLND_INIT_NOTHING) {
2834 rc = kiblnd_base_startup();
2839 LIBCFS_ALLOC(net, sizeof(*net));
2844 memset(net, 0, sizeof(*net));
2846 cfs_gettimeofday(&tv);
2847 net->ibn_incarnation = (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
2849 ni->ni_peertimeout = *kiblnd_tunables.kib_peertimeout;
2850 ni->ni_maxtxcredits = *kiblnd_tunables.kib_credits;
2851 ni->ni_peertxcredits = *kiblnd_tunables.kib_peertxcredits;
2852 ni->ni_peerrtrcredits = *kiblnd_tunables.kib_peerrtrcredits;
2854 if (ni->ni_interfaces[0] != NULL) {
2855 /* Use the IPoIB interface specified in 'networks=' */
2857 CLASSERT (LNET_MAX_INTERFACES > 1);
2858 if (ni->ni_interfaces[1] != NULL) {
2859 CERROR("Multiple interfaces not supported\n");
2863 ifname = ni->ni_interfaces[0];
2865 ifname = *kiblnd_tunables.kib_default_ipif;
2868 if (strlen(ifname) >= sizeof(ibdev->ibd_ifname)) {
2869 CERROR("IPoIB interface name too long: %s\n", ifname);
2873 cfs_list_for_each (tmp, &kiblnd_data.kib_devs) {
2874 ibdev = cfs_list_entry(tmp, kib_dev_t, ibd_list);
2876 if (!strcmp(&ibdev->ibd_ifname[0], ifname))
2883 ibdev = kiblnd_create_dev(ifname);
2888 net->ibn_dev = ibdev;
2889 ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid), ibdev->ibd_ifip);
2891 rc = kiblnd_net_init_pools(net);
2893 CERROR("Failed to initialize NI pools: %d\n", rc);
2897 cfs_write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2899 cfs_list_add_tail(&net->ibn_list, &ibdev->ibd_nets);
2900 cfs_write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2902 net->ibn_init = IBLND_INIT_ALL;
2907 if (net->ibn_dev == NULL && ibdev != NULL)
2908 kiblnd_destroy_dev(ibdev);
2910 kiblnd_shutdown(ni);
2912 CDEBUG(D_NET, "kiblnd_startup failed\n");
2917 kiblnd_module_fini (void)
2919 lnet_unregister_lnd(&the_o2iblnd);
2920 kiblnd_tunables_fini();
2924 kiblnd_module_init (void)
2928 CLASSERT (sizeof(kib_msg_t) <= IBLND_MSG_SIZE);
2929 CLASSERT (offsetof(kib_msg_t, ibm_u.get.ibgm_rd.rd_frags[IBLND_MAX_RDMA_FRAGS])
2931 CLASSERT (offsetof(kib_msg_t, ibm_u.putack.ibpam_rd.rd_frags[IBLND_MAX_RDMA_FRAGS])
2934 rc = kiblnd_tunables_init();
2938 lnet_register_lnd(&the_o2iblnd);
2943 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2944 MODULE_DESCRIPTION("Kernel OpenIB gen2 LND v2.00");
2945 MODULE_LICENSE("GPL");
2947 module_init(kiblnd_module_init);
2948 module_exit(kiblnd_module_fini);