/* * GPL HEADER START * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 only, * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License version 2 for more details (a copy is included * in the LICENSE file that accompanied this code). * * You should have received a copy of the GNU General Public License * version 2 along with this program; If not, see * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * * GPL HEADER END */ /* * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * * Copyright (c) 2011, 2012, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. * * lnet/klnds/o2iblnd/o2iblnd.c * * Author: Eric Barton */ #include "o2iblnd.h" lnd_t the_o2iblnd = { .lnd_type = O2IBLND, .lnd_startup = kiblnd_startup, .lnd_shutdown = kiblnd_shutdown, .lnd_ctl = kiblnd_ctl, .lnd_query = kiblnd_query, .lnd_send = kiblnd_send, .lnd_recv = kiblnd_recv, }; kib_data_t kiblnd_data; __u32 kiblnd_cksum (void *ptr, int nob) { char *c = ptr; __u32 sum = 0; while (nob-- > 0) sum = ((sum << 1) | (sum >> 31)) + *c++; /* ensure I don't return 0 (== no checksum) */ return (sum == 0) ? 1 : sum; } static char * kiblnd_msgtype2str(int type) { switch (type) { case IBLND_MSG_CONNREQ: return "CONNREQ"; case IBLND_MSG_CONNACK: return "CONNACK"; case IBLND_MSG_NOOP: return "NOOP"; case IBLND_MSG_IMMEDIATE: return "IMMEDIATE"; case IBLND_MSG_PUT_REQ: return "PUT_REQ"; case IBLND_MSG_PUT_NAK: return "PUT_NAK"; case IBLND_MSG_PUT_ACK: return "PUT_ACK"; case IBLND_MSG_PUT_DONE: return "PUT_DONE"; case IBLND_MSG_GET_REQ: return "GET_REQ"; case IBLND_MSG_GET_DONE: return "GET_DONE"; default: return "???"; } } static int kiblnd_msgtype2size(int type) { const int hdr_size = offsetof(kib_msg_t, ibm_u); switch (type) { case IBLND_MSG_CONNREQ: case IBLND_MSG_CONNACK: return hdr_size + sizeof(kib_connparams_t); case IBLND_MSG_NOOP: return hdr_size; case IBLND_MSG_IMMEDIATE: return offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[0]); case IBLND_MSG_PUT_REQ: return hdr_size + sizeof(kib_putreq_msg_t); case IBLND_MSG_PUT_ACK: return hdr_size + sizeof(kib_putack_msg_t); case IBLND_MSG_GET_REQ: return hdr_size + sizeof(kib_get_msg_t); case IBLND_MSG_PUT_NAK: case IBLND_MSG_PUT_DONE: case IBLND_MSG_GET_DONE: return hdr_size + sizeof(kib_completion_msg_t); default: return -1; } } static int kiblnd_unpack_rd(kib_msg_t *msg, int flip) { kib_rdma_desc_t *rd; int nob; int n; int i; LASSERT (msg->ibm_type == IBLND_MSG_GET_REQ || msg->ibm_type == IBLND_MSG_PUT_ACK); rd = msg->ibm_type == IBLND_MSG_GET_REQ ? &msg->ibm_u.get.ibgm_rd : &msg->ibm_u.putack.ibpam_rd; if (flip) { __swab32s(&rd->rd_key); __swab32s(&rd->rd_nfrags); } n = rd->rd_nfrags; if (n <= 0 || n > IBLND_MAX_RDMA_FRAGS) { CERROR("Bad nfrags: %d, should be 0 < n <= %d\n", n, IBLND_MAX_RDMA_FRAGS); return 1; } nob = offsetof (kib_msg_t, ibm_u) + kiblnd_rd_msg_size(rd, msg->ibm_type, n); if (msg->ibm_nob < nob) { CERROR("Short %s: %d(%d)\n", kiblnd_msgtype2str(msg->ibm_type), msg->ibm_nob, nob); return 1; } if (!flip) return 0; for (i = 0; i < n; i++) { __swab32s(&rd->rd_frags[i].rf_nob); __swab64s(&rd->rd_frags[i].rf_addr); } return 0; } void kiblnd_pack_msg (lnet_ni_t *ni, kib_msg_t *msg, int version, int credits, lnet_nid_t dstnid, __u64 dststamp) { kib_net_t *net = ni->ni_data; /* CAVEAT EMPTOR! all message fields not set here should have been * initialised previously. */ msg->ibm_magic = IBLND_MSG_MAGIC; msg->ibm_version = version; /* ibm_type */ msg->ibm_credits = credits; /* ibm_nob */ msg->ibm_cksum = 0; msg->ibm_srcnid = ni->ni_nid; msg->ibm_srcstamp = net->ibn_incarnation; msg->ibm_dstnid = dstnid; msg->ibm_dststamp = dststamp; if (*kiblnd_tunables.kib_cksum) { /* NB ibm_cksum zero while computing cksum */ msg->ibm_cksum = kiblnd_cksum(msg, msg->ibm_nob); } } int kiblnd_unpack_msg(kib_msg_t *msg, int nob) { const int hdr_size = offsetof(kib_msg_t, ibm_u); __u32 msg_cksum; __u16 version; int msg_nob; int flip; /* 6 bytes are enough to have received magic + version */ if (nob < 6) { CERROR("Short message: %d\n", nob); return -EPROTO; } if (msg->ibm_magic == IBLND_MSG_MAGIC) { flip = 0; } else if (msg->ibm_magic == __swab32(IBLND_MSG_MAGIC)) { flip = 1; } else { CERROR("Bad magic: %08x\n", msg->ibm_magic); return -EPROTO; } version = flip ? __swab16(msg->ibm_version) : msg->ibm_version; if (version != IBLND_MSG_VERSION && version != IBLND_MSG_VERSION_1) { CERROR("Bad version: %x\n", version); return -EPROTO; } if (nob < hdr_size) { CERROR("Short message: %d\n", nob); return -EPROTO; } msg_nob = flip ? __swab32(msg->ibm_nob) : msg->ibm_nob; if (msg_nob > nob) { CERROR("Short message: got %d, wanted %d\n", nob, msg_nob); return -EPROTO; } /* checksum must be computed with ibm_cksum zero and BEFORE anything * gets flipped */ msg_cksum = flip ? __swab32(msg->ibm_cksum) : msg->ibm_cksum; msg->ibm_cksum = 0; if (msg_cksum != 0 && msg_cksum != kiblnd_cksum(msg, msg_nob)) { CERROR("Bad checksum\n"); return -EPROTO; } msg->ibm_cksum = msg_cksum; if (flip) { /* leave magic unflipped as a clue to peer endianness */ msg->ibm_version = version; CLASSERT (sizeof(msg->ibm_type) == 1); CLASSERT (sizeof(msg->ibm_credits) == 1); msg->ibm_nob = msg_nob; __swab64s(&msg->ibm_srcnid); __swab64s(&msg->ibm_srcstamp); __swab64s(&msg->ibm_dstnid); __swab64s(&msg->ibm_dststamp); } if (msg->ibm_srcnid == LNET_NID_ANY) { CERROR("Bad src nid: %s\n", libcfs_nid2str(msg->ibm_srcnid)); return -EPROTO; } if (msg_nob < kiblnd_msgtype2size(msg->ibm_type)) { CERROR("Short %s: %d(%d)\n", kiblnd_msgtype2str(msg->ibm_type), msg_nob, kiblnd_msgtype2size(msg->ibm_type)); return -EPROTO; } switch (msg->ibm_type) { default: CERROR("Unknown message type %x\n", msg->ibm_type); return -EPROTO; case IBLND_MSG_NOOP: case IBLND_MSG_IMMEDIATE: case IBLND_MSG_PUT_REQ: break; case IBLND_MSG_PUT_ACK: case IBLND_MSG_GET_REQ: if (kiblnd_unpack_rd(msg, flip)) return -EPROTO; break; case IBLND_MSG_PUT_NAK: case IBLND_MSG_PUT_DONE: case IBLND_MSG_GET_DONE: if (flip) __swab32s(&msg->ibm_u.completion.ibcm_status); break; case IBLND_MSG_CONNREQ: case IBLND_MSG_CONNACK: if (flip) { __swab16s(&msg->ibm_u.connparams.ibcp_queue_depth); __swab16s(&msg->ibm_u.connparams.ibcp_max_frags); __swab32s(&msg->ibm_u.connparams.ibcp_max_msg_size); } break; } return 0; } int kiblnd_create_peer(lnet_ni_t *ni, kib_peer_t **peerp, lnet_nid_t nid) { kib_peer_t *peer; kib_net_t *net = ni->ni_data; int cpt = lnet_cpt_of_nid(nid); unsigned long flags; LASSERT(net != NULL); LASSERT(nid != LNET_NID_ANY); LIBCFS_CPT_ALLOC(peer, lnet_cpt_table(), cpt, sizeof(*peer)); if (peer == NULL) { CERROR("Cannot allocate peer\n"); return -ENOMEM; } memset(peer, 0, sizeof(*peer)); /* zero flags etc */ peer->ibp_ni = ni; peer->ibp_nid = nid; peer->ibp_error = 0; peer->ibp_last_alive = 0; atomic_set(&peer->ibp_refcount, 1); /* 1 ref for caller */ CFS_INIT_LIST_HEAD(&peer->ibp_list); /* not in the peer table yet */ CFS_INIT_LIST_HEAD(&peer->ibp_conns); CFS_INIT_LIST_HEAD(&peer->ibp_tx_queue); write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); /* always called with a ref on ni, which prevents ni being shutdown */ LASSERT (net->ibn_shutdown == 0); /* npeers only grows with the global lock held */ atomic_inc(&net->ibn_npeers); write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); *peerp = peer; return 0; } void kiblnd_destroy_peer (kib_peer_t *peer) { kib_net_t *net = peer->ibp_ni->ni_data; LASSERT (net != NULL); LASSERT (atomic_read(&peer->ibp_refcount) == 0); LASSERT (!kiblnd_peer_active(peer)); LASSERT (peer->ibp_connecting == 0); LASSERT (peer->ibp_accepting == 0); LASSERT (cfs_list_empty(&peer->ibp_conns)); LASSERT (cfs_list_empty(&peer->ibp_tx_queue)); LIBCFS_FREE(peer, sizeof(*peer)); /* NB a peer's connections keep a reference on their peer until * they are destroyed, so we can be assured that _all_ state to do * with this peer has been cleaned up when its refcount drops to * zero. */ atomic_dec(&net->ibn_npeers); } kib_peer_t * kiblnd_find_peer_locked (lnet_nid_t nid) { /* the caller is responsible for accounting the additional reference * that this creates */ cfs_list_t *peer_list = kiblnd_nid2peerlist(nid); cfs_list_t *tmp; kib_peer_t *peer; cfs_list_for_each (tmp, peer_list) { peer = cfs_list_entry(tmp, kib_peer_t, ibp_list); LASSERT (peer->ibp_connecting > 0 || /* creating conns */ peer->ibp_accepting > 0 || !cfs_list_empty(&peer->ibp_conns)); /* active conn */ if (peer->ibp_nid != nid) continue; CDEBUG(D_NET, "got peer [%p] -> %s (%d) version: %x\n", peer, libcfs_nid2str(nid), atomic_read(&peer->ibp_refcount), peer->ibp_version); return peer; } return NULL; } void kiblnd_unlink_peer_locked (kib_peer_t *peer) { LASSERT (cfs_list_empty(&peer->ibp_conns)); LASSERT (kiblnd_peer_active(peer)); cfs_list_del_init(&peer->ibp_list); /* lose peerlist's ref */ kiblnd_peer_decref(peer); } int kiblnd_get_peer_info (lnet_ni_t *ni, int index, lnet_nid_t *nidp, int *count) { kib_peer_t *peer; cfs_list_t *ptmp; int i; unsigned long flags; read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) { cfs_list_for_each (ptmp, &kiblnd_data.kib_peers[i]) { peer = cfs_list_entry(ptmp, kib_peer_t, ibp_list); LASSERT (peer->ibp_connecting > 0 || peer->ibp_accepting > 0 || !cfs_list_empty(&peer->ibp_conns)); if (peer->ibp_ni != ni) continue; if (index-- > 0) continue; *nidp = peer->ibp_nid; *count = atomic_read(&peer->ibp_refcount); read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); return 0; } } read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); return -ENOENT; } void kiblnd_del_peer_locked (kib_peer_t *peer) { cfs_list_t *ctmp; cfs_list_t *cnxt; kib_conn_t *conn; if (cfs_list_empty(&peer->ibp_conns)) { kiblnd_unlink_peer_locked(peer); } else { cfs_list_for_each_safe (ctmp, cnxt, &peer->ibp_conns) { conn = cfs_list_entry(ctmp, kib_conn_t, ibc_list); kiblnd_close_conn_locked(conn, 0); } /* NB closing peer's last conn unlinked it. */ } /* NB peer now unlinked; might even be freed if the peer table had the * last ref on it. */ } int kiblnd_del_peer (lnet_ni_t *ni, lnet_nid_t nid) { CFS_LIST_HEAD (zombies); cfs_list_t *ptmp; cfs_list_t *pnxt; kib_peer_t *peer; int lo; int hi; int i; unsigned long flags; int rc = -ENOENT; write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); if (nid != LNET_NID_ANY) { lo = hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers; } else { lo = 0; hi = kiblnd_data.kib_peer_hash_size - 1; } for (i = lo; i <= hi; i++) { cfs_list_for_each_safe (ptmp, pnxt, &kiblnd_data.kib_peers[i]) { peer = cfs_list_entry(ptmp, kib_peer_t, ibp_list); LASSERT (peer->ibp_connecting > 0 || peer->ibp_accepting > 0 || !cfs_list_empty(&peer->ibp_conns)); if (peer->ibp_ni != ni) continue; if (!(nid == LNET_NID_ANY || peer->ibp_nid == nid)) continue; if (!cfs_list_empty(&peer->ibp_tx_queue)) { LASSERT (cfs_list_empty(&peer->ibp_conns)); cfs_list_splice_init(&peer->ibp_tx_queue, &zombies); } kiblnd_del_peer_locked(peer); rc = 0; /* matched something */ } } write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); kiblnd_txlist_done(ni, &zombies, -EIO); return rc; } kib_conn_t * kiblnd_get_conn_by_idx (lnet_ni_t *ni, int index) { kib_peer_t *peer; cfs_list_t *ptmp; kib_conn_t *conn; cfs_list_t *ctmp; int i; unsigned long flags; read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) { cfs_list_for_each (ptmp, &kiblnd_data.kib_peers[i]) { peer = cfs_list_entry(ptmp, kib_peer_t, ibp_list); LASSERT (peer->ibp_connecting > 0 || peer->ibp_accepting > 0 || !cfs_list_empty(&peer->ibp_conns)); if (peer->ibp_ni != ni) continue; cfs_list_for_each (ctmp, &peer->ibp_conns) { if (index-- > 0) continue; conn = cfs_list_entry(ctmp, kib_conn_t, ibc_list); kiblnd_conn_addref(conn); read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); return conn; } } } read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); return NULL; } void kiblnd_debug_rx (kib_rx_t *rx) { CDEBUG(D_CONSOLE, " %p status %d msg_type %x cred %d\n", rx, rx->rx_status, rx->rx_msg->ibm_type, rx->rx_msg->ibm_credits); } void kiblnd_debug_tx (kib_tx_t *tx) { CDEBUG(D_CONSOLE, " %p snd %d q %d w %d rc %d dl %lx " "cookie "LPX64" msg %s%s type %x cred %d\n", tx, tx->tx_sending, tx->tx_queued, tx->tx_waiting, tx->tx_status, tx->tx_deadline, tx->tx_cookie, tx->tx_lntmsg[0] == NULL ? "-" : "!", tx->tx_lntmsg[1] == NULL ? "-" : "!", tx->tx_msg->ibm_type, tx->tx_msg->ibm_credits); } void kiblnd_debug_conn (kib_conn_t *conn) { cfs_list_t *tmp; int i; spin_lock(&conn->ibc_lock); CDEBUG(D_CONSOLE, "conn[%d] %p [version %x] -> %s: \n", atomic_read(&conn->ibc_refcount), conn, conn->ibc_version, libcfs_nid2str(conn->ibc_peer->ibp_nid)); CDEBUG(D_CONSOLE, " state %d nposted %d/%d cred %d o_cred %d r_cred %d\n", conn->ibc_state, conn->ibc_noops_posted, conn->ibc_nsends_posted, conn->ibc_credits, conn->ibc_outstanding_credits, conn->ibc_reserved_credits); CDEBUG(D_CONSOLE, " comms_err %d\n", conn->ibc_comms_error); CDEBUG(D_CONSOLE, " early_rxs:\n"); cfs_list_for_each(tmp, &conn->ibc_early_rxs) kiblnd_debug_rx(cfs_list_entry(tmp, kib_rx_t, rx_list)); CDEBUG(D_CONSOLE, " tx_noops:\n"); cfs_list_for_each(tmp, &conn->ibc_tx_noops) kiblnd_debug_tx(cfs_list_entry(tmp, kib_tx_t, tx_list)); CDEBUG(D_CONSOLE, " tx_queue_nocred:\n"); cfs_list_for_each(tmp, &conn->ibc_tx_queue_nocred) kiblnd_debug_tx(cfs_list_entry(tmp, kib_tx_t, tx_list)); CDEBUG(D_CONSOLE, " tx_queue_rsrvd:\n"); cfs_list_for_each(tmp, &conn->ibc_tx_queue_rsrvd) kiblnd_debug_tx(cfs_list_entry(tmp, kib_tx_t, tx_list)); CDEBUG(D_CONSOLE, " tx_queue:\n"); cfs_list_for_each(tmp, &conn->ibc_tx_queue) kiblnd_debug_tx(cfs_list_entry(tmp, kib_tx_t, tx_list)); CDEBUG(D_CONSOLE, " active_txs:\n"); cfs_list_for_each(tmp, &conn->ibc_active_txs) kiblnd_debug_tx(cfs_list_entry(tmp, kib_tx_t, tx_list)); CDEBUG(D_CONSOLE, " rxs:\n"); for (i = 0; i < IBLND_RX_MSGS(conn->ibc_version); i++) kiblnd_debug_rx(&conn->ibc_rxs[i]); spin_unlock(&conn->ibc_lock); } int kiblnd_translate_mtu(int value) { switch (value) { default: return -1; case 0: return 0; case 256: return IB_MTU_256; case 512: return IB_MTU_512; case 1024: return IB_MTU_1024; case 2048: return IB_MTU_2048; case 4096: return IB_MTU_4096; } } static void kiblnd_setup_mtu_locked(struct rdma_cm_id *cmid) { int mtu; /* XXX There is no path record for iWARP, set by netdev->change_mtu? */ if (cmid->route.path_rec == NULL) return; mtu = kiblnd_translate_mtu(*kiblnd_tunables.kib_ib_mtu); LASSERT (mtu >= 0); if (mtu != 0) cmid->route.path_rec->mtu = mtu; } #ifdef HAVE_OFED_IB_COMP_VECTOR static int kiblnd_get_completion_vector(kib_conn_t *conn, int cpt) { cpumask_t *mask; int vectors; int off; int i; vectors = conn->ibc_cmid->device->num_comp_vectors; if (vectors <= 1) return 0; mask = cfs_cpt_cpumask(lnet_cpt_table(), cpt); /* hash NID to CPU id in this partition... */ off = conn->ibc_peer->ibp_nid % cpus_weight(*mask); for_each_cpu_mask(i, *mask) { if (off-- == 0) return i % vectors; } LBUG(); return 1; } #endif kib_conn_t * kiblnd_create_conn(kib_peer_t *peer, struct rdma_cm_id *cmid, int state, int version) { /* CAVEAT EMPTOR: * If the new conn is created successfully it takes over the caller's * ref on 'peer'. It also "owns" 'cmid' and destroys it when it itself * is destroyed. On failure, the caller's ref on 'peer' remains and * she must dispose of 'cmid'. (Actually I'd block forever if I tried * to destroy 'cmid' here since I'm called from the CM which still has * its ref on 'cmid'). */ rwlock_t *glock = &kiblnd_data.kib_global_lock; kib_net_t *net = peer->ibp_ni->ni_data; kib_dev_t *dev; struct ib_qp_init_attr *init_qp_attr; struct kib_sched_info *sched; kib_conn_t *conn; struct ib_cq *cq; unsigned long flags; int cpt; int rc; int i; LASSERT(net != NULL); LASSERT(!in_interrupt()); dev = net->ibn_dev; cpt = lnet_cpt_of_nid(peer->ibp_nid); sched = kiblnd_data.kib_scheds[cpt]; LASSERT(sched->ibs_nthreads > 0); LIBCFS_CPT_ALLOC(init_qp_attr, lnet_cpt_table(), cpt, sizeof(*init_qp_attr)); if (init_qp_attr == NULL) { CERROR("Can't allocate qp_attr for %s\n", libcfs_nid2str(peer->ibp_nid)); goto failed_0; } LIBCFS_CPT_ALLOC(conn, lnet_cpt_table(), cpt, sizeof(*conn)); if (conn == NULL) { CERROR("Can't allocate connection for %s\n", libcfs_nid2str(peer->ibp_nid)); goto failed_1; } conn->ibc_state = IBLND_CONN_INIT; conn->ibc_version = version; conn->ibc_peer = peer; /* I take the caller's ref */ cmid->context = conn; /* for future CM callbacks */ conn->ibc_cmid = cmid; CFS_INIT_LIST_HEAD(&conn->ibc_early_rxs); CFS_INIT_LIST_HEAD(&conn->ibc_tx_noops); CFS_INIT_LIST_HEAD(&conn->ibc_tx_queue); CFS_INIT_LIST_HEAD(&conn->ibc_tx_queue_rsrvd); CFS_INIT_LIST_HEAD(&conn->ibc_tx_queue_nocred); CFS_INIT_LIST_HEAD(&conn->ibc_active_txs); spin_lock_init(&conn->ibc_lock); LIBCFS_CPT_ALLOC(conn->ibc_connvars, lnet_cpt_table(), cpt, sizeof(*conn->ibc_connvars)); if (conn->ibc_connvars == NULL) { CERROR("Can't allocate in-progress connection state\n"); goto failed_2; } write_lock_irqsave(glock, flags); if (dev->ibd_failover) { write_unlock_irqrestore(glock, flags); CERROR("%s: failover in progress\n", dev->ibd_ifname); goto failed_2; } if (dev->ibd_hdev->ibh_ibdev != cmid->device) { /* wakeup failover thread and teardown connection */ if (kiblnd_dev_can_failover(dev)) { cfs_list_add_tail(&dev->ibd_fail_list, &kiblnd_data.kib_failed_devs); wake_up(&kiblnd_data.kib_failover_waitq); } write_unlock_irqrestore(glock, flags); CERROR("cmid HCA(%s), kib_dev(%s) need failover\n", cmid->device->name, dev->ibd_ifname); goto failed_2; } kiblnd_hdev_addref_locked(dev->ibd_hdev); conn->ibc_hdev = dev->ibd_hdev; kiblnd_setup_mtu_locked(cmid); write_unlock_irqrestore(glock, flags); LIBCFS_CPT_ALLOC(conn->ibc_rxs, lnet_cpt_table(), cpt, IBLND_RX_MSGS(version) * sizeof(kib_rx_t)); if (conn->ibc_rxs == NULL) { CERROR("Cannot allocate RX buffers\n"); goto failed_2; } rc = kiblnd_alloc_pages(&conn->ibc_rx_pages, cpt, IBLND_RX_MSG_PAGES(version)); if (rc != 0) goto failed_2; kiblnd_map_rx_descs(conn); #ifdef HAVE_OFED_IB_COMP_VECTOR cq = ib_create_cq(cmid->device, kiblnd_cq_completion, kiblnd_cq_event, conn, IBLND_CQ_ENTRIES(version), kiblnd_get_completion_vector(conn, cpt)); #else cq = ib_create_cq(cmid->device, kiblnd_cq_completion, kiblnd_cq_event, conn, IBLND_CQ_ENTRIES(version)); #endif if (IS_ERR(cq)) { CERROR("Can't create CQ: %ld, cqe: %d\n", PTR_ERR(cq), IBLND_CQ_ENTRIES(version)); goto failed_2; } conn->ibc_cq = cq; rc = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); if (rc != 0) { CERROR("Can't request completion notificiation: %d\n", rc); goto failed_2; } init_qp_attr->event_handler = kiblnd_qp_event; init_qp_attr->qp_context = conn; init_qp_attr->cap.max_send_wr = IBLND_SEND_WRS(version); init_qp_attr->cap.max_recv_wr = IBLND_RECV_WRS(version); init_qp_attr->cap.max_send_sge = 1; init_qp_attr->cap.max_recv_sge = 1; init_qp_attr->sq_sig_type = IB_SIGNAL_REQ_WR; init_qp_attr->qp_type = IB_QPT_RC; init_qp_attr->send_cq = cq; init_qp_attr->recv_cq = cq; conn->ibc_sched = sched; rc = rdma_create_qp(cmid, conn->ibc_hdev->ibh_pd, init_qp_attr); if (rc != 0) { CERROR("Can't create QP: %d, send_wr: %d, recv_wr: %d\n", rc, init_qp_attr->cap.max_send_wr, init_qp_attr->cap.max_recv_wr); goto failed_2; } LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr)); /* 1 ref for caller and each rxmsg */ atomic_set(&conn->ibc_refcount, 1 + IBLND_RX_MSGS(version)); conn->ibc_nrx = IBLND_RX_MSGS(version); /* post receives */ for (i = 0; i < IBLND_RX_MSGS(version); i++) { rc = kiblnd_post_rx(&conn->ibc_rxs[i], IBLND_POSTRX_NO_CREDIT); if (rc != 0) { CERROR("Can't post rxmsg: %d\n", rc); /* Make posted receives complete */ kiblnd_abort_receives(conn); /* correct # of posted buffers * NB locking needed now I'm racing with completion */ spin_lock_irqsave(&sched->ibs_lock, flags); conn->ibc_nrx -= IBLND_RX_MSGS(version) - i; spin_unlock_irqrestore(&sched->ibs_lock, flags); /* cmid will be destroyed by CM(ofed) after cm_callback * returned, so we can't refer it anymore * (by kiblnd_connd()->kiblnd_destroy_conn) */ rdma_destroy_qp(conn->ibc_cmid); conn->ibc_cmid = NULL; /* Drop my own and unused rxbuffer refcounts */ while (i++ <= IBLND_RX_MSGS(version)) kiblnd_conn_decref(conn); return NULL; } } /* Init successful! */ LASSERT (state == IBLND_CONN_ACTIVE_CONNECT || state == IBLND_CONN_PASSIVE_WAIT); conn->ibc_state = state; /* 1 more conn */ atomic_inc(&net->ibn_nconns); return conn; failed_2: kiblnd_destroy_conn(conn); failed_1: LIBCFS_FREE(init_qp_attr, sizeof(*init_qp_attr)); failed_0: return NULL; } void kiblnd_destroy_conn (kib_conn_t *conn) { struct rdma_cm_id *cmid = conn->ibc_cmid; kib_peer_t *peer = conn->ibc_peer; int rc; LASSERT (!in_interrupt()); LASSERT (atomic_read(&conn->ibc_refcount) == 0); LASSERT (cfs_list_empty(&conn->ibc_early_rxs)); LASSERT (cfs_list_empty(&conn->ibc_tx_noops)); LASSERT (cfs_list_empty(&conn->ibc_tx_queue)); LASSERT (cfs_list_empty(&conn->ibc_tx_queue_rsrvd)); LASSERT (cfs_list_empty(&conn->ibc_tx_queue_nocred)); LASSERT (cfs_list_empty(&conn->ibc_active_txs)); LASSERT (conn->ibc_noops_posted == 0); LASSERT (conn->ibc_nsends_posted == 0); switch (conn->ibc_state) { default: /* conn must be completely disengaged from the network */ LBUG(); case IBLND_CONN_DISCONNECTED: /* connvars should have been freed already */ LASSERT (conn->ibc_connvars == NULL); break; case IBLND_CONN_INIT: break; } /* conn->ibc_cmid might be destroyed by CM already */ if (cmid != NULL && cmid->qp != NULL) rdma_destroy_qp(cmid); if (conn->ibc_cq != NULL) { rc = ib_destroy_cq(conn->ibc_cq); if (rc != 0) CWARN("Error destroying CQ: %d\n", rc); } if (conn->ibc_rx_pages != NULL) kiblnd_unmap_rx_descs(conn); if (conn->ibc_rxs != NULL) { LIBCFS_FREE(conn->ibc_rxs, IBLND_RX_MSGS(conn->ibc_version) * sizeof(kib_rx_t)); } if (conn->ibc_connvars != NULL) LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars)); if (conn->ibc_hdev != NULL) kiblnd_hdev_decref(conn->ibc_hdev); /* See CAVEAT EMPTOR above in kiblnd_create_conn */ if (conn->ibc_state != IBLND_CONN_INIT) { kib_net_t *net = peer->ibp_ni->ni_data; kiblnd_peer_decref(peer); rdma_destroy_id(cmid); atomic_dec(&net->ibn_nconns); } LIBCFS_FREE(conn, sizeof(*conn)); } int kiblnd_close_peer_conns_locked (kib_peer_t *peer, int why) { kib_conn_t *conn; cfs_list_t *ctmp; cfs_list_t *cnxt; int count = 0; cfs_list_for_each_safe (ctmp, cnxt, &peer->ibp_conns) { conn = cfs_list_entry(ctmp, kib_conn_t, ibc_list); CDEBUG(D_NET, "Closing conn -> %s, " "version: %x, reason: %d\n", libcfs_nid2str(peer->ibp_nid), conn->ibc_version, why); kiblnd_close_conn_locked(conn, why); count++; } return count; } int kiblnd_close_stale_conns_locked (kib_peer_t *peer, int version, __u64 incarnation) { kib_conn_t *conn; cfs_list_t *ctmp; cfs_list_t *cnxt; int count = 0; cfs_list_for_each_safe (ctmp, cnxt, &peer->ibp_conns) { conn = cfs_list_entry(ctmp, kib_conn_t, ibc_list); if (conn->ibc_version == version && conn->ibc_incarnation == incarnation) continue; CDEBUG(D_NET, "Closing stale conn -> %s version: %x, " "incarnation:"LPX64"(%x, "LPX64")\n", libcfs_nid2str(peer->ibp_nid), conn->ibc_version, conn->ibc_incarnation, version, incarnation); kiblnd_close_conn_locked(conn, -ESTALE); count++; } return count; } int kiblnd_close_matching_conns (lnet_ni_t *ni, lnet_nid_t nid) { kib_peer_t *peer; cfs_list_t *ptmp; cfs_list_t *pnxt; int lo; int hi; int i; unsigned long flags; int count = 0; write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); if (nid != LNET_NID_ANY) lo = hi = kiblnd_nid2peerlist(nid) - kiblnd_data.kib_peers; else { lo = 0; hi = kiblnd_data.kib_peer_hash_size - 1; } for (i = lo; i <= hi; i++) { cfs_list_for_each_safe (ptmp, pnxt, &kiblnd_data.kib_peers[i]) { peer = cfs_list_entry(ptmp, kib_peer_t, ibp_list); LASSERT (peer->ibp_connecting > 0 || peer->ibp_accepting > 0 || !cfs_list_empty(&peer->ibp_conns)); if (peer->ibp_ni != ni) continue; if (!(nid == LNET_NID_ANY || nid == peer->ibp_nid)) continue; count += kiblnd_close_peer_conns_locked(peer, 0); } } write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); /* wildcards always succeed */ if (nid == LNET_NID_ANY) return 0; return (count == 0) ? -ENOENT : 0; } int kiblnd_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg) { struct libcfs_ioctl_data *data = arg; int rc = -EINVAL; switch(cmd) { case IOC_LIBCFS_GET_PEER: { lnet_nid_t nid = 0; int count = 0; rc = kiblnd_get_peer_info(ni, data->ioc_count, &nid, &count); data->ioc_nid = nid; data->ioc_count = count; break; } case IOC_LIBCFS_DEL_PEER: { rc = kiblnd_del_peer(ni, data->ioc_nid); break; } case IOC_LIBCFS_GET_CONN: { kib_conn_t *conn; rc = 0; conn = kiblnd_get_conn_by_idx(ni, data->ioc_count); if (conn == NULL) { rc = -ENOENT; break; } LASSERT (conn->ibc_cmid != NULL); data->ioc_nid = conn->ibc_peer->ibp_nid; if (conn->ibc_cmid->route.path_rec == NULL) data->ioc_u32[0] = 0; /* iWarp has no path MTU */ else data->ioc_u32[0] = ib_mtu_enum_to_int(conn->ibc_cmid->route.path_rec->mtu); kiblnd_conn_decref(conn); break; } case IOC_LIBCFS_CLOSE_CONNECTION: { rc = kiblnd_close_matching_conns(ni, data->ioc_nid); break; } default: break; } return rc; } void kiblnd_query (lnet_ni_t *ni, lnet_nid_t nid, cfs_time_t *when) { cfs_time_t last_alive = 0; cfs_time_t now = cfs_time_current(); rwlock_t *glock = &kiblnd_data.kib_global_lock; kib_peer_t *peer; unsigned long flags; read_lock_irqsave(glock, flags); peer = kiblnd_find_peer_locked(nid); if (peer != NULL) { LASSERT (peer->ibp_connecting > 0 || /* creating conns */ peer->ibp_accepting > 0 || !cfs_list_empty(&peer->ibp_conns)); /* active conn */ last_alive = peer->ibp_last_alive; } read_unlock_irqrestore(glock, flags); if (last_alive != 0) *when = last_alive; /* peer is not persistent in hash, trigger peer creation * and connection establishment with a NULL tx */ if (peer == NULL) kiblnd_launch_tx(ni, NULL, nid); CDEBUG(D_NET, "Peer %s %p, alive %ld secs ago\n", libcfs_nid2str(nid), peer, last_alive ? cfs_duration_sec(now - last_alive) : -1); return; } void kiblnd_free_pages(kib_pages_t *p) { int npages = p->ibp_npages; int i; for (i = 0; i < npages; i++) { if (p->ibp_pages[i] != NULL) __free_page(p->ibp_pages[i]); } LIBCFS_FREE(p, offsetof(kib_pages_t, ibp_pages[npages])); } int kiblnd_alloc_pages(kib_pages_t **pp, int cpt, int npages) { kib_pages_t *p; int i; LIBCFS_CPT_ALLOC(p, lnet_cpt_table(), cpt, offsetof(kib_pages_t, ibp_pages[npages])); if (p == NULL) { CERROR("Can't allocate descriptor for %d pages\n", npages); return -ENOMEM; } memset(p, 0, offsetof(kib_pages_t, ibp_pages[npages])); p->ibp_npages = npages; for (i = 0; i < npages; i++) { p->ibp_pages[i] = cfs_page_cpt_alloc(lnet_cpt_table(), cpt, __GFP_IO); if (p->ibp_pages[i] == NULL) { CERROR("Can't allocate page %d of %d\n", i, npages); kiblnd_free_pages(p); return -ENOMEM; } } *pp = p; return 0; } void kiblnd_unmap_rx_descs(kib_conn_t *conn) { kib_rx_t *rx; int i; LASSERT (conn->ibc_rxs != NULL); LASSERT (conn->ibc_hdev != NULL); for (i = 0; i < IBLND_RX_MSGS(conn->ibc_version); i++) { rx = &conn->ibc_rxs[i]; LASSERT (rx->rx_nob >= 0); /* not posted */ kiblnd_dma_unmap_single(conn->ibc_hdev->ibh_ibdev, KIBLND_UNMAP_ADDR(rx, rx_msgunmap, rx->rx_msgaddr), IBLND_MSG_SIZE, DMA_FROM_DEVICE); } kiblnd_free_pages(conn->ibc_rx_pages); conn->ibc_rx_pages = NULL; } void kiblnd_map_rx_descs(kib_conn_t *conn) { kib_rx_t *rx; struct page *pg; int pg_off; int ipg; int i; for (pg_off = ipg = i = 0; i < IBLND_RX_MSGS(conn->ibc_version); i++) { pg = conn->ibc_rx_pages->ibp_pages[ipg]; rx = &conn->ibc_rxs[i]; rx->rx_conn = conn; rx->rx_msg = (kib_msg_t *)(((char *)page_address(pg)) + pg_off); rx->rx_msgaddr = kiblnd_dma_map_single(conn->ibc_hdev->ibh_ibdev, rx->rx_msg, IBLND_MSG_SIZE, DMA_FROM_DEVICE); LASSERT (!kiblnd_dma_mapping_error(conn->ibc_hdev->ibh_ibdev, rx->rx_msgaddr)); KIBLND_UNMAP_ADDR_SET(rx, rx_msgunmap, rx->rx_msgaddr); CDEBUG(D_NET,"rx %d: %p "LPX64"("LPX64")\n", i, rx->rx_msg, rx->rx_msgaddr, lnet_page2phys(pg) + pg_off); pg_off += IBLND_MSG_SIZE; LASSERT (pg_off <= PAGE_SIZE); if (pg_off == PAGE_SIZE) { pg_off = 0; ipg++; LASSERT (ipg <= IBLND_RX_MSG_PAGES(conn->ibc_version)); } } } static void kiblnd_unmap_tx_pool(kib_tx_pool_t *tpo) { kib_hca_dev_t *hdev = tpo->tpo_hdev; kib_tx_t *tx; int i; LASSERT (tpo->tpo_pool.po_allocated == 0); if (hdev == NULL) return; for (i = 0; i < tpo->tpo_pool.po_size; i++) { tx = &tpo->tpo_tx_descs[i]; kiblnd_dma_unmap_single(hdev->ibh_ibdev, KIBLND_UNMAP_ADDR(tx, tx_msgunmap, tx->tx_msgaddr), IBLND_MSG_SIZE, DMA_TO_DEVICE); } kiblnd_hdev_decref(hdev); tpo->tpo_hdev = NULL; } static kib_hca_dev_t * kiblnd_current_hdev(kib_dev_t *dev) { kib_hca_dev_t *hdev; unsigned long flags; int i = 0; read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); while (dev->ibd_failover) { read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); if (i++ % 50 == 0) CDEBUG(D_NET, "%s: Wait for failover\n", dev->ibd_ifname); schedule_timeout(cfs_time_seconds(1) / 100); read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); } kiblnd_hdev_addref_locked(dev->ibd_hdev); hdev = dev->ibd_hdev; read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); return hdev; } static void kiblnd_map_tx_pool(kib_tx_pool_t *tpo) { kib_pages_t *txpgs = tpo->tpo_tx_pages; kib_pool_t *pool = &tpo->tpo_pool; kib_net_t *net = pool->po_owner->ps_net; kib_dev_t *dev; struct page *page; kib_tx_t *tx; int page_offset; int ipage; int i; LASSERT (net != NULL); dev = net->ibn_dev; /* pre-mapped messages are not bigger than 1 page */ CLASSERT (IBLND_MSG_SIZE <= PAGE_SIZE); /* No fancy arithmetic when we do the buffer calculations */ CLASSERT (PAGE_SIZE % IBLND_MSG_SIZE == 0); tpo->tpo_hdev = kiblnd_current_hdev(dev); for (ipage = page_offset = i = 0; i < pool->po_size; i++) { page = txpgs->ibp_pages[ipage]; tx = &tpo->tpo_tx_descs[i]; tx->tx_msg = (kib_msg_t *)(((char *)page_address(page)) + page_offset); tx->tx_msgaddr = kiblnd_dma_map_single( tpo->tpo_hdev->ibh_ibdev, tx->tx_msg, IBLND_MSG_SIZE, DMA_TO_DEVICE); LASSERT (!kiblnd_dma_mapping_error(tpo->tpo_hdev->ibh_ibdev, tx->tx_msgaddr)); KIBLND_UNMAP_ADDR_SET(tx, tx_msgunmap, tx->tx_msgaddr); cfs_list_add(&tx->tx_list, &pool->po_free_list); page_offset += IBLND_MSG_SIZE; LASSERT (page_offset <= PAGE_SIZE); if (page_offset == PAGE_SIZE) { page_offset = 0; ipage++; LASSERT (ipage <= txpgs->ibp_npages); } } } struct ib_mr * kiblnd_find_dma_mr(kib_hca_dev_t *hdev, __u64 addr, __u64 size) { __u64 index; LASSERT (hdev->ibh_mrs[0] != NULL); if (hdev->ibh_nmrs == 1) return hdev->ibh_mrs[0]; index = addr >> hdev->ibh_mr_shift; if (index < hdev->ibh_nmrs && index == ((addr + size - 1) >> hdev->ibh_mr_shift)) return hdev->ibh_mrs[index]; return NULL; } struct ib_mr * kiblnd_find_rd_dma_mr(kib_hca_dev_t *hdev, kib_rdma_desc_t *rd) { struct ib_mr *prev_mr; struct ib_mr *mr; int i; LASSERT (hdev->ibh_mrs[0] != NULL); if (*kiblnd_tunables.kib_map_on_demand > 0 && *kiblnd_tunables.kib_map_on_demand <= rd->rd_nfrags) return NULL; if (hdev->ibh_nmrs == 1) return hdev->ibh_mrs[0]; for (i = 0, mr = prev_mr = NULL; i < rd->rd_nfrags; i++) { mr = kiblnd_find_dma_mr(hdev, rd->rd_frags[i].rf_addr, rd->rd_frags[i].rf_nob); if (prev_mr == NULL) prev_mr = mr; if (mr == NULL || prev_mr != mr) { /* Can't covered by one single MR */ mr = NULL; break; } } return mr; } void kiblnd_destroy_fmr_pool(kib_fmr_pool_t *pool) { LASSERT (pool->fpo_map_count == 0); if (pool->fpo_fmr_pool != NULL) ib_destroy_fmr_pool(pool->fpo_fmr_pool); if (pool->fpo_hdev != NULL) kiblnd_hdev_decref(pool->fpo_hdev); LIBCFS_FREE(pool, sizeof(kib_fmr_pool_t)); } void kiblnd_destroy_fmr_pool_list(cfs_list_t *head) { kib_fmr_pool_t *pool; while (!cfs_list_empty(head)) { pool = cfs_list_entry(head->next, kib_fmr_pool_t, fpo_list); cfs_list_del(&pool->fpo_list); kiblnd_destroy_fmr_pool(pool); } } static int kiblnd_fmr_pool_size(int ncpts) { int size = *kiblnd_tunables.kib_fmr_pool_size / ncpts; return max(IBLND_FMR_POOL, size); } static int kiblnd_fmr_flush_trigger(int ncpts) { int size = *kiblnd_tunables.kib_fmr_flush_trigger / ncpts; return max(IBLND_FMR_POOL_FLUSH, size); } int kiblnd_create_fmr_pool(kib_fmr_poolset_t *fps, kib_fmr_pool_t **pp_fpo) { /* FMR pool for RDMA */ kib_dev_t *dev = fps->fps_net->ibn_dev; kib_fmr_pool_t *fpo; struct ib_fmr_pool_param param = { .max_pages_per_fmr = LNET_MAX_PAYLOAD/PAGE_SIZE, .page_shift = PAGE_SHIFT, .access = (IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE), .pool_size = fps->fps_pool_size, .dirty_watermark = fps->fps_flush_trigger, .flush_function = NULL, .flush_arg = NULL, .cache = !!*kiblnd_tunables.kib_fmr_cache}; int rc; LIBCFS_CPT_ALLOC(fpo, lnet_cpt_table(), fps->fps_cpt, sizeof(*fpo)); if (fpo == NULL) return -ENOMEM; fpo->fpo_hdev = kiblnd_current_hdev(dev); fpo->fpo_fmr_pool = ib_create_fmr_pool(fpo->fpo_hdev->ibh_pd, ¶m); if (IS_ERR(fpo->fpo_fmr_pool)) { rc = PTR_ERR(fpo->fpo_fmr_pool); CERROR("Failed to create FMR pool: %d\n", rc); kiblnd_hdev_decref(fpo->fpo_hdev); LIBCFS_FREE(fpo, sizeof(kib_fmr_pool_t)); return rc; } fpo->fpo_deadline = cfs_time_shift(IBLND_POOL_DEADLINE); fpo->fpo_owner = fps; *pp_fpo = fpo; return 0; } static void kiblnd_fail_fmr_poolset(kib_fmr_poolset_t *fps, cfs_list_t *zombies) { if (fps->fps_net == NULL) /* intialized? */ return; spin_lock(&fps->fps_lock); while (!cfs_list_empty(&fps->fps_pool_list)) { kib_fmr_pool_t *fpo = cfs_list_entry(fps->fps_pool_list.next, kib_fmr_pool_t, fpo_list); fpo->fpo_failed = 1; cfs_list_del(&fpo->fpo_list); if (fpo->fpo_map_count == 0) cfs_list_add(&fpo->fpo_list, zombies); else cfs_list_add(&fpo->fpo_list, &fps->fps_failed_pool_list); } spin_unlock(&fps->fps_lock); } static void kiblnd_fini_fmr_poolset(kib_fmr_poolset_t *fps) { if (fps->fps_net != NULL) { /* initialized? */ kiblnd_destroy_fmr_pool_list(&fps->fps_failed_pool_list); kiblnd_destroy_fmr_pool_list(&fps->fps_pool_list); } } static int kiblnd_init_fmr_poolset(kib_fmr_poolset_t *fps, int cpt, kib_net_t *net, int pool_size, int flush_trigger) { kib_fmr_pool_t *fpo; int rc; memset(fps, 0, sizeof(kib_fmr_poolset_t)); fps->fps_net = net; fps->fps_cpt = cpt; fps->fps_pool_size = pool_size; fps->fps_flush_trigger = flush_trigger; spin_lock_init(&fps->fps_lock); CFS_INIT_LIST_HEAD(&fps->fps_pool_list); CFS_INIT_LIST_HEAD(&fps->fps_failed_pool_list); rc = kiblnd_create_fmr_pool(fps, &fpo); if (rc == 0) cfs_list_add_tail(&fpo->fpo_list, &fps->fps_pool_list); return rc; } static int kiblnd_fmr_pool_is_idle(kib_fmr_pool_t *fpo, cfs_time_t now) { if (fpo->fpo_map_count != 0) /* still in use */ return 0; if (fpo->fpo_failed) return 1; return cfs_time_aftereq(now, fpo->fpo_deadline); } void kiblnd_fmr_pool_unmap(kib_fmr_t *fmr, int status) { CFS_LIST_HEAD (zombies); kib_fmr_pool_t *fpo = fmr->fmr_pool; kib_fmr_poolset_t *fps = fpo->fpo_owner; cfs_time_t now = cfs_time_current(); kib_fmr_pool_t *tmp; int rc; rc = ib_fmr_pool_unmap(fmr->fmr_pfmr); LASSERT (rc == 0); if (status != 0) { rc = ib_flush_fmr_pool(fpo->fpo_fmr_pool); LASSERT (rc == 0); } fmr->fmr_pool = NULL; fmr->fmr_pfmr = NULL; spin_lock(&fps->fps_lock); fpo->fpo_map_count --; /* decref the pool */ cfs_list_for_each_entry_safe(fpo, tmp, &fps->fps_pool_list, fpo_list) { /* the first pool is persistent */ if (fps->fps_pool_list.next == &fpo->fpo_list) continue; if (kiblnd_fmr_pool_is_idle(fpo, now)) { cfs_list_move(&fpo->fpo_list, &zombies); fps->fps_version ++; } } spin_unlock(&fps->fps_lock); if (!cfs_list_empty(&zombies)) kiblnd_destroy_fmr_pool_list(&zombies); } int kiblnd_fmr_pool_map(kib_fmr_poolset_t *fps, __u64 *pages, int npages, __u64 iov, kib_fmr_t *fmr) { struct ib_pool_fmr *pfmr; kib_fmr_pool_t *fpo; __u64 version; int rc; again: spin_lock(&fps->fps_lock); version = fps->fps_version; cfs_list_for_each_entry(fpo, &fps->fps_pool_list, fpo_list) { fpo->fpo_deadline = cfs_time_shift(IBLND_POOL_DEADLINE); fpo->fpo_map_count++; spin_unlock(&fps->fps_lock); pfmr = ib_fmr_pool_map_phys(fpo->fpo_fmr_pool, pages, npages, iov); if (likely(!IS_ERR(pfmr))) { fmr->fmr_pool = fpo; fmr->fmr_pfmr = pfmr; return 0; } spin_lock(&fps->fps_lock); fpo->fpo_map_count--; if (PTR_ERR(pfmr) != -EAGAIN) { spin_unlock(&fps->fps_lock); return PTR_ERR(pfmr); } /* EAGAIN and ... */ if (version != fps->fps_version) { spin_unlock(&fps->fps_lock); goto again; } } if (fps->fps_increasing) { spin_unlock(&fps->fps_lock); CDEBUG(D_NET, "Another thread is allocating new " "FMR pool, waiting for her to complete\n"); schedule(); goto again; } if (cfs_time_before(cfs_time_current(), fps->fps_next_retry)) { /* someone failed recently */ spin_unlock(&fps->fps_lock); return -EAGAIN; } fps->fps_increasing = 1; spin_unlock(&fps->fps_lock); CDEBUG(D_NET, "Allocate new FMR pool\n"); rc = kiblnd_create_fmr_pool(fps, &fpo); spin_lock(&fps->fps_lock); fps->fps_increasing = 0; if (rc == 0) { fps->fps_version++; cfs_list_add_tail(&fpo->fpo_list, &fps->fps_pool_list); } else { fps->fps_next_retry = cfs_time_shift(IBLND_POOL_RETRY); } spin_unlock(&fps->fps_lock); goto again; } static void kiblnd_fini_pool(kib_pool_t *pool) { LASSERT (cfs_list_empty(&pool->po_free_list)); LASSERT (pool->po_allocated == 0); CDEBUG(D_NET, "Finalize %s pool\n", pool->po_owner->ps_name); } static void kiblnd_init_pool(kib_poolset_t *ps, kib_pool_t *pool, int size) { CDEBUG(D_NET, "Initialize %s pool\n", ps->ps_name); memset(pool, 0, sizeof(kib_pool_t)); CFS_INIT_LIST_HEAD(&pool->po_free_list); pool->po_deadline = cfs_time_shift(IBLND_POOL_DEADLINE); pool->po_owner = ps; pool->po_size = size; } void kiblnd_destroy_pool_list(cfs_list_t *head) { kib_pool_t *pool; while (!cfs_list_empty(head)) { pool = cfs_list_entry(head->next, kib_pool_t, po_list); cfs_list_del(&pool->po_list); LASSERT (pool->po_owner != NULL); pool->po_owner->ps_pool_destroy(pool); } } static void kiblnd_fail_poolset(kib_poolset_t *ps, cfs_list_t *zombies) { if (ps->ps_net == NULL) /* intialized? */ return; spin_lock(&ps->ps_lock); while (!cfs_list_empty(&ps->ps_pool_list)) { kib_pool_t *po = cfs_list_entry(ps->ps_pool_list.next, kib_pool_t, po_list); po->po_failed = 1; cfs_list_del(&po->po_list); if (po->po_allocated == 0) cfs_list_add(&po->po_list, zombies); else cfs_list_add(&po->po_list, &ps->ps_failed_pool_list); } spin_unlock(&ps->ps_lock); } static void kiblnd_fini_poolset(kib_poolset_t *ps) { if (ps->ps_net != NULL) { /* initialized? */ kiblnd_destroy_pool_list(&ps->ps_failed_pool_list); kiblnd_destroy_pool_list(&ps->ps_pool_list); } } static int kiblnd_init_poolset(kib_poolset_t *ps, int cpt, kib_net_t *net, char *name, int size, kib_ps_pool_create_t po_create, kib_ps_pool_destroy_t po_destroy, kib_ps_node_init_t nd_init, kib_ps_node_fini_t nd_fini) { kib_pool_t *pool; int rc; memset(ps, 0, sizeof(kib_poolset_t)); ps->ps_cpt = cpt; ps->ps_net = net; ps->ps_pool_create = po_create; ps->ps_pool_destroy = po_destroy; ps->ps_node_init = nd_init; ps->ps_node_fini = nd_fini; ps->ps_pool_size = size; if (strlcpy(ps->ps_name, name, sizeof(ps->ps_name)) >= sizeof(ps->ps_name)) return -E2BIG; spin_lock_init(&ps->ps_lock); CFS_INIT_LIST_HEAD(&ps->ps_pool_list); CFS_INIT_LIST_HEAD(&ps->ps_failed_pool_list); rc = ps->ps_pool_create(ps, size, &pool); if (rc == 0) cfs_list_add(&pool->po_list, &ps->ps_pool_list); else CERROR("Failed to create the first pool for %s\n", ps->ps_name); return rc; } static int kiblnd_pool_is_idle(kib_pool_t *pool, cfs_time_t now) { if (pool->po_allocated != 0) /* still in use */ return 0; if (pool->po_failed) return 1; return cfs_time_aftereq(now, pool->po_deadline); } void kiblnd_pool_free_node(kib_pool_t *pool, cfs_list_t *node) { CFS_LIST_HEAD (zombies); kib_poolset_t *ps = pool->po_owner; kib_pool_t *tmp; cfs_time_t now = cfs_time_current(); spin_lock(&ps->ps_lock); if (ps->ps_node_fini != NULL) ps->ps_node_fini(pool, node); LASSERT (pool->po_allocated > 0); cfs_list_add(node, &pool->po_free_list); pool->po_allocated --; cfs_list_for_each_entry_safe(pool, tmp, &ps->ps_pool_list, po_list) { /* the first pool is persistent */ if (ps->ps_pool_list.next == &pool->po_list) continue; if (kiblnd_pool_is_idle(pool, now)) cfs_list_move(&pool->po_list, &zombies); } spin_unlock(&ps->ps_lock); if (!cfs_list_empty(&zombies)) kiblnd_destroy_pool_list(&zombies); } cfs_list_t * kiblnd_pool_alloc_node(kib_poolset_t *ps) { cfs_list_t *node; kib_pool_t *pool; int rc; again: spin_lock(&ps->ps_lock); cfs_list_for_each_entry(pool, &ps->ps_pool_list, po_list) { if (cfs_list_empty(&pool->po_free_list)) continue; pool->po_allocated ++; pool->po_deadline = cfs_time_shift(IBLND_POOL_DEADLINE); node = pool->po_free_list.next; cfs_list_del(node); if (ps->ps_node_init != NULL) { /* still hold the lock */ ps->ps_node_init(pool, node); } spin_unlock(&ps->ps_lock); return node; } /* no available tx pool and ... */ if (ps->ps_increasing) { /* another thread is allocating a new pool */ spin_unlock(&ps->ps_lock); CDEBUG(D_NET, "Another thread is allocating new " "%s pool, waiting for her to complete\n", ps->ps_name); schedule(); goto again; } if (cfs_time_before(cfs_time_current(), ps->ps_next_retry)) { /* someone failed recently */ spin_unlock(&ps->ps_lock); return NULL; } ps->ps_increasing = 1; spin_unlock(&ps->ps_lock); CDEBUG(D_NET, "%s pool exhausted, allocate new pool\n", ps->ps_name); rc = ps->ps_pool_create(ps, ps->ps_pool_size, &pool); spin_lock(&ps->ps_lock); ps->ps_increasing = 0; if (rc == 0) { cfs_list_add_tail(&pool->po_list, &ps->ps_pool_list); } else { ps->ps_next_retry = cfs_time_shift(IBLND_POOL_RETRY); CERROR("Can't allocate new %s pool because out of memory\n", ps->ps_name); } spin_unlock(&ps->ps_lock); goto again; } void kiblnd_pmr_pool_unmap(kib_phys_mr_t *pmr) { kib_pmr_pool_t *ppo = pmr->pmr_pool; struct ib_mr *mr = pmr->pmr_mr; pmr->pmr_mr = NULL; kiblnd_pool_free_node(&ppo->ppo_pool, &pmr->pmr_list); if (mr != NULL) ib_dereg_mr(mr); } int kiblnd_pmr_pool_map(kib_pmr_poolset_t *pps, kib_hca_dev_t *hdev, kib_rdma_desc_t *rd, __u64 *iova, kib_phys_mr_t **pp_pmr) { kib_phys_mr_t *pmr; cfs_list_t *node; int rc; int i; node = kiblnd_pool_alloc_node(&pps->pps_poolset); if (node == NULL) { CERROR("Failed to allocate PMR descriptor\n"); return -ENOMEM; } pmr = container_of(node, kib_phys_mr_t, pmr_list); if (pmr->pmr_pool->ppo_hdev != hdev) { kiblnd_pool_free_node(&pmr->pmr_pool->ppo_pool, node); return -EAGAIN; } for (i = 0; i < rd->rd_nfrags; i ++) { pmr->pmr_ipb[i].addr = rd->rd_frags[i].rf_addr; pmr->pmr_ipb[i].size = rd->rd_frags[i].rf_nob; } pmr->pmr_mr = ib_reg_phys_mr(hdev->ibh_pd, pmr->pmr_ipb, rd->rd_nfrags, IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE, iova); if (!IS_ERR(pmr->pmr_mr)) { pmr->pmr_iova = *iova; *pp_pmr = pmr; return 0; } rc = PTR_ERR(pmr->pmr_mr); CERROR("Failed ib_reg_phys_mr: %d\n", rc); pmr->pmr_mr = NULL; kiblnd_pool_free_node(&pmr->pmr_pool->ppo_pool, node); return rc; } static void kiblnd_destroy_pmr_pool(kib_pool_t *pool) { kib_pmr_pool_t *ppo = container_of(pool, kib_pmr_pool_t, ppo_pool); kib_phys_mr_t *pmr; LASSERT (pool->po_allocated == 0); while (!cfs_list_empty(&pool->po_free_list)) { pmr = cfs_list_entry(pool->po_free_list.next, kib_phys_mr_t, pmr_list); LASSERT (pmr->pmr_mr == NULL); cfs_list_del(&pmr->pmr_list); if (pmr->pmr_ipb != NULL) { LIBCFS_FREE(pmr->pmr_ipb, IBLND_MAX_RDMA_FRAGS * sizeof(struct ib_phys_buf)); } LIBCFS_FREE(pmr, sizeof(kib_phys_mr_t)); } kiblnd_fini_pool(pool); if (ppo->ppo_hdev != NULL) kiblnd_hdev_decref(ppo->ppo_hdev); LIBCFS_FREE(ppo, sizeof(kib_pmr_pool_t)); } static inline int kiblnd_pmr_pool_size(int ncpts) { int size = *kiblnd_tunables.kib_pmr_pool_size / ncpts; return max(IBLND_PMR_POOL, size); } static int kiblnd_create_pmr_pool(kib_poolset_t *ps, int size, kib_pool_t **pp_po) { struct kib_pmr_pool *ppo; struct kib_pool *pool; kib_phys_mr_t *pmr; int i; LIBCFS_CPT_ALLOC(ppo, lnet_cpt_table(), ps->ps_cpt, sizeof(kib_pmr_pool_t)); if (ppo == NULL) { CERROR("Failed to allocate PMR pool\n"); return -ENOMEM; } pool = &ppo->ppo_pool; kiblnd_init_pool(ps, pool, size); for (i = 0; i < size; i++) { LIBCFS_CPT_ALLOC(pmr, lnet_cpt_table(), ps->ps_cpt, sizeof(kib_phys_mr_t)); if (pmr == NULL) break; pmr->pmr_pool = ppo; LIBCFS_CPT_ALLOC(pmr->pmr_ipb, lnet_cpt_table(), ps->ps_cpt, IBLND_MAX_RDMA_FRAGS * sizeof(*pmr->pmr_ipb)); if (pmr->pmr_ipb == NULL) break; cfs_list_add(&pmr->pmr_list, &pool->po_free_list); } if (i < size) { ps->ps_pool_destroy(pool); return -ENOMEM; } ppo->ppo_hdev = kiblnd_current_hdev(ps->ps_net->ibn_dev); *pp_po = pool; return 0; } static void kiblnd_destroy_tx_pool(kib_pool_t *pool) { kib_tx_pool_t *tpo = container_of(pool, kib_tx_pool_t, tpo_pool); int i; LASSERT (pool->po_allocated == 0); if (tpo->tpo_tx_pages != NULL) { kiblnd_unmap_tx_pool(tpo); kiblnd_free_pages(tpo->tpo_tx_pages); } if (tpo->tpo_tx_descs == NULL) goto out; for (i = 0; i < pool->po_size; i++) { kib_tx_t *tx = &tpo->tpo_tx_descs[i]; cfs_list_del(&tx->tx_list); if (tx->tx_pages != NULL) LIBCFS_FREE(tx->tx_pages, LNET_MAX_IOV * sizeof(*tx->tx_pages)); if (tx->tx_frags != NULL) LIBCFS_FREE(tx->tx_frags, IBLND_MAX_RDMA_FRAGS * sizeof(*tx->tx_frags)); if (tx->tx_wrq != NULL) LIBCFS_FREE(tx->tx_wrq, (1 + IBLND_MAX_RDMA_FRAGS) * sizeof(*tx->tx_wrq)); if (tx->tx_sge != NULL) LIBCFS_FREE(tx->tx_sge, (1 + IBLND_MAX_RDMA_FRAGS) * sizeof(*tx->tx_sge)); if (tx->tx_rd != NULL) LIBCFS_FREE(tx->tx_rd, offsetof(kib_rdma_desc_t, rd_frags[IBLND_MAX_RDMA_FRAGS])); } LIBCFS_FREE(tpo->tpo_tx_descs, pool->po_size * sizeof(kib_tx_t)); out: kiblnd_fini_pool(pool); LIBCFS_FREE(tpo, sizeof(kib_tx_pool_t)); } static int kiblnd_tx_pool_size(int ncpts) { int ntx = *kiblnd_tunables.kib_ntx / ncpts; return max(IBLND_TX_POOL, ntx); } static int kiblnd_create_tx_pool(kib_poolset_t *ps, int size, kib_pool_t **pp_po) { int i; int npg; kib_pool_t *pool; kib_tx_pool_t *tpo; LIBCFS_CPT_ALLOC(tpo, lnet_cpt_table(), ps->ps_cpt, sizeof(*tpo)); if (tpo == NULL) { CERROR("Failed to allocate TX pool\n"); return -ENOMEM; } pool = &tpo->tpo_pool; kiblnd_init_pool(ps, pool, size); tpo->tpo_tx_descs = NULL; tpo->tpo_tx_pages = NULL; npg = (size * IBLND_MSG_SIZE + PAGE_SIZE - 1) / PAGE_SIZE; if (kiblnd_alloc_pages(&tpo->tpo_tx_pages, ps->ps_cpt, npg) != 0) { CERROR("Can't allocate tx pages: %d\n", npg); LIBCFS_FREE(tpo, sizeof(kib_tx_pool_t)); return -ENOMEM; } LIBCFS_CPT_ALLOC(tpo->tpo_tx_descs, lnet_cpt_table(), ps->ps_cpt, size * sizeof(kib_tx_t)); if (tpo->tpo_tx_descs == NULL) { CERROR("Can't allocate %d tx descriptors\n", size); ps->ps_pool_destroy(pool); return -ENOMEM; } memset(tpo->tpo_tx_descs, 0, size * sizeof(kib_tx_t)); for (i = 0; i < size; i++) { kib_tx_t *tx = &tpo->tpo_tx_descs[i]; tx->tx_pool = tpo; if (ps->ps_net->ibn_fmr_ps != NULL) { LIBCFS_CPT_ALLOC(tx->tx_pages, lnet_cpt_table(), ps->ps_cpt, LNET_MAX_IOV * sizeof(*tx->tx_pages)); if (tx->tx_pages == NULL) break; } LIBCFS_CPT_ALLOC(tx->tx_frags, lnet_cpt_table(), ps->ps_cpt, IBLND_MAX_RDMA_FRAGS * sizeof(*tx->tx_frags)); if (tx->tx_frags == NULL) break; sg_init_table(tx->tx_frags, IBLND_MAX_RDMA_FRAGS); LIBCFS_CPT_ALLOC(tx->tx_wrq, lnet_cpt_table(), ps->ps_cpt, (1 + IBLND_MAX_RDMA_FRAGS) * sizeof(*tx->tx_wrq)); if (tx->tx_wrq == NULL) break; LIBCFS_CPT_ALLOC(tx->tx_sge, lnet_cpt_table(), ps->ps_cpt, (1 + IBLND_MAX_RDMA_FRAGS) * sizeof(*tx->tx_sge)); if (tx->tx_sge == NULL) break; LIBCFS_CPT_ALLOC(tx->tx_rd, lnet_cpt_table(), ps->ps_cpt, offsetof(kib_rdma_desc_t, rd_frags[IBLND_MAX_RDMA_FRAGS])); if (tx->tx_rd == NULL) break; } if (i == size) { kiblnd_map_tx_pool(tpo); *pp_po = pool; return 0; } ps->ps_pool_destroy(pool); return -ENOMEM; } static void kiblnd_tx_init(kib_pool_t *pool, cfs_list_t *node) { kib_tx_poolset_t *tps = container_of(pool->po_owner, kib_tx_poolset_t, tps_poolset); kib_tx_t *tx = cfs_list_entry(node, kib_tx_t, tx_list); tx->tx_cookie = tps->tps_next_tx_cookie ++; } void kiblnd_net_fini_pools(kib_net_t *net) { int i; cfs_cpt_for_each(i, lnet_cpt_table()) { kib_tx_poolset_t *tps; kib_fmr_poolset_t *fps; kib_pmr_poolset_t *pps; if (net->ibn_tx_ps != NULL) { tps = net->ibn_tx_ps[i]; kiblnd_fini_poolset(&tps->tps_poolset); } if (net->ibn_fmr_ps != NULL) { fps = net->ibn_fmr_ps[i]; kiblnd_fini_fmr_poolset(fps); } if (net->ibn_pmr_ps != NULL) { pps = net->ibn_pmr_ps[i]; kiblnd_fini_poolset(&pps->pps_poolset); } } if (net->ibn_tx_ps != NULL) { cfs_percpt_free(net->ibn_tx_ps); net->ibn_tx_ps = NULL; } if (net->ibn_fmr_ps != NULL) { cfs_percpt_free(net->ibn_fmr_ps); net->ibn_fmr_ps = NULL; } if (net->ibn_pmr_ps != NULL) { cfs_percpt_free(net->ibn_pmr_ps); net->ibn_pmr_ps = NULL; } } int kiblnd_net_init_pools(kib_net_t *net, __u32 *cpts, int ncpts) { unsigned long flags; int cpt; int rc; int i; read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); if (*kiblnd_tunables.kib_map_on_demand == 0 && net->ibn_dev->ibd_hdev->ibh_nmrs == 1) { read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); goto create_tx_pool; } read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); if (*kiblnd_tunables.kib_fmr_pool_size < *kiblnd_tunables.kib_ntx / 4) { CERROR("Can't set fmr pool size (%d) < ntx / 4(%d)\n", *kiblnd_tunables.kib_fmr_pool_size, *kiblnd_tunables.kib_ntx / 4); rc = -EINVAL; goto failed; } /* TX pool must be created later than FMR/PMR, see LU-2268 * for details */ LASSERT(net->ibn_tx_ps == NULL); /* premapping can fail if ibd_nmr > 1, so we always create * FMR/PMR pool and map-on-demand if premapping failed */ net->ibn_fmr_ps = cfs_percpt_alloc(lnet_cpt_table(), sizeof(kib_fmr_poolset_t)); if (net->ibn_fmr_ps == NULL) { CERROR("Failed to allocate FMR pool array\n"); rc = -ENOMEM; goto failed; } for (i = 0; i < ncpts; i++) { cpt = (cpts == NULL) ? i : cpts[i]; rc = kiblnd_init_fmr_poolset(net->ibn_fmr_ps[cpt], cpt, net, kiblnd_fmr_pool_size(ncpts), kiblnd_fmr_flush_trigger(ncpts)); if (rc == -ENOSYS && i == 0) /* no FMR */ break; /* create PMR pool */ if (rc != 0) { /* a real error */ CERROR("Can't initialize FMR pool for CPT %d: %d\n", cpt, rc); goto failed; } } if (i > 0) { LASSERT(i == ncpts); goto create_tx_pool; } cfs_percpt_free(net->ibn_fmr_ps); net->ibn_fmr_ps = NULL; CWARN("Device does not support FMR, failing back to PMR\n"); if (*kiblnd_tunables.kib_pmr_pool_size < *kiblnd_tunables.kib_ntx / 4) { CERROR("Can't set pmr pool size (%d) < ntx / 4(%d)\n", *kiblnd_tunables.kib_pmr_pool_size, *kiblnd_tunables.kib_ntx / 4); rc = -EINVAL; goto failed; } net->ibn_pmr_ps = cfs_percpt_alloc(lnet_cpt_table(), sizeof(kib_pmr_poolset_t)); if (net->ibn_pmr_ps == NULL) { CERROR("Failed to allocate PMR pool array\n"); rc = -ENOMEM; goto failed; } for (i = 0; i < ncpts; i++) { cpt = (cpts == NULL) ? i : cpts[i]; rc = kiblnd_init_poolset(&net->ibn_pmr_ps[cpt]->pps_poolset, cpt, net, "PMR", kiblnd_pmr_pool_size(ncpts), kiblnd_create_pmr_pool, kiblnd_destroy_pmr_pool, NULL, NULL); if (rc != 0) { CERROR("Can't initialize PMR pool for CPT %d: %d\n", cpt, rc); goto failed; } } create_tx_pool: net->ibn_tx_ps = cfs_percpt_alloc(lnet_cpt_table(), sizeof(kib_tx_poolset_t)); if (net->ibn_tx_ps == NULL) { CERROR("Failed to allocate tx pool array\n"); rc = -ENOMEM; goto failed; } for (i = 0; i < ncpts; i++) { cpt = (cpts == NULL) ? i : cpts[i]; rc = kiblnd_init_poolset(&net->ibn_tx_ps[cpt]->tps_poolset, cpt, net, "TX", kiblnd_tx_pool_size(ncpts), kiblnd_create_tx_pool, kiblnd_destroy_tx_pool, kiblnd_tx_init, NULL); if (rc != 0) { CERROR("Can't initialize TX pool for CPT %d: %d\n", cpt, rc); goto failed; } } return 0; failed: kiblnd_net_fini_pools(net); LASSERT(rc != 0); return rc; } static int kiblnd_hdev_get_attr(kib_hca_dev_t *hdev) { struct ib_device_attr *attr; int rc; /* It's safe to assume a HCA can handle a page size * matching that of the native system */ hdev->ibh_page_shift = PAGE_SHIFT; hdev->ibh_page_size = 1 << PAGE_SHIFT; hdev->ibh_page_mask = ~((__u64)hdev->ibh_page_size - 1); LIBCFS_ALLOC(attr, sizeof(*attr)); if (attr == NULL) { CERROR("Out of memory\n"); return -ENOMEM; } rc = ib_query_device(hdev->ibh_ibdev, attr); if (rc == 0) hdev->ibh_mr_size = attr->max_mr_size; LIBCFS_FREE(attr, sizeof(*attr)); if (rc != 0) { CERROR("Failed to query IB device: %d\n", rc); return rc; } if (hdev->ibh_mr_size == ~0ULL) { hdev->ibh_mr_shift = 64; return 0; } for (hdev->ibh_mr_shift = 0; hdev->ibh_mr_shift < 64; hdev->ibh_mr_shift ++) { if (hdev->ibh_mr_size == (1ULL << hdev->ibh_mr_shift) || hdev->ibh_mr_size == (1ULL << hdev->ibh_mr_shift) - 1) return 0; } CERROR("Invalid mr size: "LPX64"\n", hdev->ibh_mr_size); return -EINVAL; } void kiblnd_hdev_cleanup_mrs(kib_hca_dev_t *hdev) { int i; if (hdev->ibh_nmrs == 0 || hdev->ibh_mrs == NULL) return; for (i = 0; i < hdev->ibh_nmrs; i++) { if (hdev->ibh_mrs[i] == NULL) break; ib_dereg_mr(hdev->ibh_mrs[i]); } LIBCFS_FREE(hdev->ibh_mrs, sizeof(*hdev->ibh_mrs) * hdev->ibh_nmrs); hdev->ibh_mrs = NULL; hdev->ibh_nmrs = 0; } void kiblnd_hdev_destroy(kib_hca_dev_t *hdev) { kiblnd_hdev_cleanup_mrs(hdev); if (hdev->ibh_pd != NULL) ib_dealloc_pd(hdev->ibh_pd); if (hdev->ibh_cmid != NULL) rdma_destroy_id(hdev->ibh_cmid); LIBCFS_FREE(hdev, sizeof(*hdev)); } int kiblnd_hdev_setup_mrs(kib_hca_dev_t *hdev) { struct ib_mr *mr; int i; int rc; __u64 mm_size; __u64 mr_size; int acflags = IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE; rc = kiblnd_hdev_get_attr(hdev); if (rc != 0) return rc; if (hdev->ibh_mr_shift == 64) { LIBCFS_ALLOC(hdev->ibh_mrs, 1 * sizeof(*hdev->ibh_mrs)); if (hdev->ibh_mrs == NULL) { CERROR("Failed to allocate MRs table\n"); return -ENOMEM; } hdev->ibh_mrs[0] = NULL; hdev->ibh_nmrs = 1; mr = ib_get_dma_mr(hdev->ibh_pd, acflags); if (IS_ERR(mr)) { CERROR("Failed ib_get_dma_mr : %ld\n", PTR_ERR(mr)); kiblnd_hdev_cleanup_mrs(hdev); return PTR_ERR(mr); } hdev->ibh_mrs[0] = mr; goto out; } mr_size = (1ULL << hdev->ibh_mr_shift); mm_size = (unsigned long)high_memory - PAGE_OFFSET; hdev->ibh_nmrs = (int)((mm_size + mr_size - 1) >> hdev->ibh_mr_shift); if (hdev->ibh_mr_shift < 32 || hdev->ibh_nmrs > 1024) { /* it's 4T..., assume we will re-code at that time */ CERROR("Can't support memory size: x"LPX64 " with MR size: x"LPX64"\n", mm_size, mr_size); return -EINVAL; } /* create an array of MRs to cover all memory */ LIBCFS_ALLOC(hdev->ibh_mrs, sizeof(*hdev->ibh_mrs) * hdev->ibh_nmrs); if (hdev->ibh_mrs == NULL) { CERROR("Failed to allocate MRs' table\n"); return -ENOMEM; } memset(hdev->ibh_mrs, 0, sizeof(*hdev->ibh_mrs) * hdev->ibh_nmrs); for (i = 0; i < hdev->ibh_nmrs; i++) { struct ib_phys_buf ipb; __u64 iova; ipb.size = hdev->ibh_mr_size; ipb.addr = i * mr_size; iova = ipb.addr; mr = ib_reg_phys_mr(hdev->ibh_pd, &ipb, 1, acflags, &iova); if (IS_ERR(mr)) { CERROR("Failed ib_reg_phys_mr addr "LPX64 " size "LPX64" : %ld\n", ipb.addr, ipb.size, PTR_ERR(mr)); kiblnd_hdev_cleanup_mrs(hdev); return PTR_ERR(mr); } LASSERT (iova == ipb.addr); hdev->ibh_mrs[i] = mr; } out: if (hdev->ibh_mr_size != ~0ULL || hdev->ibh_nmrs != 1) LCONSOLE_INFO("Register global MR array, MR size: " LPX64", array size: %d\n", hdev->ibh_mr_size, hdev->ibh_nmrs); return 0; } static int kiblnd_dummy_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event) { /* DUMMY */ return 0; } static int kiblnd_dev_need_failover(kib_dev_t *dev) { struct rdma_cm_id *cmid; struct sockaddr_in srcaddr; struct sockaddr_in dstaddr; int rc; if (dev->ibd_hdev == NULL || /* initializing */ dev->ibd_hdev->ibh_cmid == NULL || /* listener is dead */ *kiblnd_tunables.kib_dev_failover > 1) /* debugging */ return 1; /* XXX: it's UGLY, but I don't have better way to find * ib-bonding HCA failover because: * * a. no reliable CM event for HCA failover... * b. no OFED API to get ib_device for current net_device... * * We have only two choices at this point: * * a. rdma_bind_addr(), it will conflict with listener cmid * b. rdma_resolve_addr() to zero addr */ cmid = kiblnd_rdma_create_id(kiblnd_dummy_callback, dev, RDMA_PS_TCP, IB_QPT_RC); if (IS_ERR(cmid)) { rc = PTR_ERR(cmid); CERROR("Failed to create cmid for failover: %d\n", rc); return rc; } memset(&srcaddr, 0, sizeof(srcaddr)); srcaddr.sin_family = AF_INET; srcaddr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip); memset(&dstaddr, 0, sizeof(dstaddr)); dstaddr.sin_family = AF_INET; rc = rdma_resolve_addr(cmid, (struct sockaddr *)&srcaddr, (struct sockaddr *)&dstaddr, 1); if (rc != 0 || cmid->device == NULL) { CERROR("Failed to bind %s:%u.%u.%u.%u to device(%p): %d\n", dev->ibd_ifname, HIPQUAD(dev->ibd_ifip), cmid->device, rc); rdma_destroy_id(cmid); return rc; } if (dev->ibd_hdev->ibh_ibdev == cmid->device) { /* don't need device failover */ rdma_destroy_id(cmid); return 0; } return 1; } int kiblnd_dev_failover(kib_dev_t *dev) { CFS_LIST_HEAD (zombie_tpo); CFS_LIST_HEAD (zombie_ppo); CFS_LIST_HEAD (zombie_fpo); struct rdma_cm_id *cmid = NULL; kib_hca_dev_t *hdev = NULL; kib_hca_dev_t *old; struct ib_pd *pd; kib_net_t *net; struct sockaddr_in addr; unsigned long flags; int rc = 0; int i; LASSERT (*kiblnd_tunables.kib_dev_failover > 1 || dev->ibd_can_failover || dev->ibd_hdev == NULL); rc = kiblnd_dev_need_failover(dev); if (rc <= 0) goto out; if (dev->ibd_hdev != NULL && dev->ibd_hdev->ibh_cmid != NULL) { /* XXX it's not good to close old listener at here, * because we can fail to create new listener. * But we have to close it now, otherwise rdma_bind_addr * will return EADDRINUSE... How crap! */ write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); cmid = dev->ibd_hdev->ibh_cmid; /* make next schedule of kiblnd_dev_need_failover() * return 1 for me */ dev->ibd_hdev->ibh_cmid = NULL; write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); rdma_destroy_id(cmid); } cmid = kiblnd_rdma_create_id(kiblnd_cm_callback, dev, RDMA_PS_TCP, IB_QPT_RC); if (IS_ERR(cmid)) { rc = PTR_ERR(cmid); CERROR("Failed to create cmid for failover: %d\n", rc); goto out; } memset(&addr, 0, sizeof(addr)); addr.sin_family = AF_INET; addr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip); addr.sin_port = htons(*kiblnd_tunables.kib_service); /* Bind to failover device or port */ rc = rdma_bind_addr(cmid, (struct sockaddr *)&addr); if (rc != 0 || cmid->device == NULL) { CERROR("Failed to bind %s:%u.%u.%u.%u to device(%p): %d\n", dev->ibd_ifname, HIPQUAD(dev->ibd_ifip), cmid->device, rc); rdma_destroy_id(cmid); goto out; } LIBCFS_ALLOC(hdev, sizeof(*hdev)); if (hdev == NULL) { CERROR("Failed to allocate kib_hca_dev\n"); rdma_destroy_id(cmid); rc = -ENOMEM; goto out; } atomic_set(&hdev->ibh_ref, 1); hdev->ibh_dev = dev; hdev->ibh_cmid = cmid; hdev->ibh_ibdev = cmid->device; pd = ib_alloc_pd(cmid->device); if (IS_ERR(pd)) { rc = PTR_ERR(pd); CERROR("Can't allocate PD: %d\n", rc); goto out; } hdev->ibh_pd = pd; rc = rdma_listen(cmid, 0); if (rc != 0) { CERROR("Can't start new listener: %d\n", rc); goto out; } rc = kiblnd_hdev_setup_mrs(hdev); if (rc != 0) { CERROR("Can't setup device: %d\n", rc); goto out; } write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); old = dev->ibd_hdev; dev->ibd_hdev = hdev; /* take over the refcount */ hdev = old; cfs_list_for_each_entry(net, &dev->ibd_nets, ibn_list) { cfs_cpt_for_each(i, lnet_cpt_table()) { kiblnd_fail_poolset(&net->ibn_tx_ps[i]->tps_poolset, &zombie_tpo); if (net->ibn_fmr_ps != NULL) { kiblnd_fail_fmr_poolset(net->ibn_fmr_ps[i], &zombie_fpo); } else if (net->ibn_pmr_ps != NULL) { kiblnd_fail_poolset(&net->ibn_pmr_ps[i]-> pps_poolset, &zombie_ppo); } } } write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); out: if (!cfs_list_empty(&zombie_tpo)) kiblnd_destroy_pool_list(&zombie_tpo); if (!cfs_list_empty(&zombie_ppo)) kiblnd_destroy_pool_list(&zombie_ppo); if (!cfs_list_empty(&zombie_fpo)) kiblnd_destroy_fmr_pool_list(&zombie_fpo); if (hdev != NULL) kiblnd_hdev_decref(hdev); if (rc != 0) dev->ibd_failed_failover++; else dev->ibd_failed_failover = 0; return rc; } void kiblnd_destroy_dev (kib_dev_t *dev) { LASSERT (dev->ibd_nnets == 0); LASSERT (cfs_list_empty(&dev->ibd_nets)); cfs_list_del(&dev->ibd_fail_list); cfs_list_del(&dev->ibd_list); if (dev->ibd_hdev != NULL) kiblnd_hdev_decref(dev->ibd_hdev); LIBCFS_FREE(dev, sizeof(*dev)); } kib_dev_t * kiblnd_create_dev(char *ifname) { struct net_device *netdev; kib_dev_t *dev; __u32 netmask; __u32 ip; int up; int rc; rc = libcfs_ipif_query(ifname, &up, &ip, &netmask); if (rc != 0) { CERROR("Can't query IPoIB interface %s: %d\n", ifname, rc); return NULL; } if (!up) { CERROR("Can't query IPoIB interface %s: it's down\n", ifname); return NULL; } LIBCFS_ALLOC(dev, sizeof(*dev)); if (dev == NULL) return NULL; memset(dev, 0, sizeof(*dev)); #ifdef HAVE_DEV_GET_BY_NAME_2ARG netdev = dev_get_by_name(&init_net, ifname); #else netdev = dev_get_by_name(ifname); #endif if (netdev == NULL) { dev->ibd_can_failover = 0; } else { dev->ibd_can_failover = !!(netdev->flags & IFF_MASTER); dev_put(netdev); } CFS_INIT_LIST_HEAD(&dev->ibd_nets); CFS_INIT_LIST_HEAD(&dev->ibd_list); /* not yet in kib_devs */ CFS_INIT_LIST_HEAD(&dev->ibd_fail_list); dev->ibd_ifip = ip; strcpy(&dev->ibd_ifname[0], ifname); /* initialize the device */ rc = kiblnd_dev_failover(dev); if (rc != 0) { CERROR("Can't initialize device: %d\n", rc); LIBCFS_FREE(dev, sizeof(*dev)); return NULL; } cfs_list_add_tail(&dev->ibd_list, &kiblnd_data.kib_devs); return dev; } void kiblnd_base_shutdown(void) { struct kib_sched_info *sched; int i; LASSERT (cfs_list_empty(&kiblnd_data.kib_devs)); CDEBUG(D_MALLOC, "before LND base cleanup: kmem %d\n", atomic_read(&libcfs_kmemory)); switch (kiblnd_data.kib_init) { default: LBUG(); case IBLND_INIT_ALL: case IBLND_INIT_DATA: LASSERT (kiblnd_data.kib_peers != NULL); for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) { LASSERT (cfs_list_empty(&kiblnd_data.kib_peers[i])); } LASSERT (cfs_list_empty(&kiblnd_data.kib_connd_zombies)); LASSERT (cfs_list_empty(&kiblnd_data.kib_connd_conns)); /* flag threads to terminate; wake and wait for them to die */ kiblnd_data.kib_shutdown = 1; /* NB: we really want to stop scheduler threads net by net * instead of the whole module, this should be improved * with dynamic configuration LNet */ cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) wake_up_all(&sched->ibs_waitq); wake_up_all(&kiblnd_data.kib_connd_waitq); wake_up_all(&kiblnd_data.kib_failover_waitq); i = 2; while (atomic_read(&kiblnd_data.kib_nthreads) != 0) { i++; CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */ "Waiting for %d threads to terminate\n", atomic_read(&kiblnd_data.kib_nthreads)); cfs_pause(cfs_time_seconds(1)); } /* fall through */ case IBLND_INIT_NOTHING: break; } if (kiblnd_data.kib_peers != NULL) { LIBCFS_FREE(kiblnd_data.kib_peers, sizeof(cfs_list_t) * kiblnd_data.kib_peer_hash_size); } if (kiblnd_data.kib_scheds != NULL) cfs_percpt_free(kiblnd_data.kib_scheds); CDEBUG(D_MALLOC, "after LND base cleanup: kmem %d\n", atomic_read(&libcfs_kmemory)); kiblnd_data.kib_init = IBLND_INIT_NOTHING; module_put(THIS_MODULE); } void kiblnd_shutdown (lnet_ni_t *ni) { kib_net_t *net = ni->ni_data; rwlock_t *g_lock = &kiblnd_data.kib_global_lock; int i; unsigned long flags; LASSERT(kiblnd_data.kib_init == IBLND_INIT_ALL); if (net == NULL) goto out; CDEBUG(D_MALLOC, "before LND net cleanup: kmem %d\n", atomic_read(&libcfs_kmemory)); write_lock_irqsave(g_lock, flags); net->ibn_shutdown = 1; write_unlock_irqrestore(g_lock, flags); switch (net->ibn_init) { default: LBUG(); case IBLND_INIT_ALL: /* nuke all existing peers within this net */ kiblnd_del_peer(ni, LNET_NID_ANY); /* Wait for all peer state to clean up */ i = 2; while (atomic_read(&net->ibn_npeers) != 0) { i++; CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* 2**n? */ "%s: waiting for %d peers to disconnect\n", libcfs_nid2str(ni->ni_nid), atomic_read(&net->ibn_npeers)); cfs_pause(cfs_time_seconds(1)); } kiblnd_net_fini_pools(net); write_lock_irqsave(g_lock, flags); LASSERT(net->ibn_dev->ibd_nnets > 0); net->ibn_dev->ibd_nnets--; cfs_list_del(&net->ibn_list); write_unlock_irqrestore(g_lock, flags); /* fall through */ case IBLND_INIT_NOTHING: LASSERT (atomic_read(&net->ibn_nconns) == 0); if (net->ibn_dev != NULL && net->ibn_dev->ibd_nnets == 0) kiblnd_destroy_dev(net->ibn_dev); break; } CDEBUG(D_MALLOC, "after LND net cleanup: kmem %d\n", atomic_read(&libcfs_kmemory)); net->ibn_init = IBLND_INIT_NOTHING; ni->ni_data = NULL; LIBCFS_FREE(net, sizeof(*net)); out: if (cfs_list_empty(&kiblnd_data.kib_devs)) kiblnd_base_shutdown(); return; } int kiblnd_base_startup(void) { struct kib_sched_info *sched; int rc; int i; LASSERT (kiblnd_data.kib_init == IBLND_INIT_NOTHING); try_module_get(THIS_MODULE); memset(&kiblnd_data, 0, sizeof(kiblnd_data)); /* zero pointers, flags etc */ rwlock_init(&kiblnd_data.kib_global_lock); CFS_INIT_LIST_HEAD(&kiblnd_data.kib_devs); CFS_INIT_LIST_HEAD(&kiblnd_data.kib_failed_devs); kiblnd_data.kib_peer_hash_size = IBLND_PEER_HASH_SIZE; LIBCFS_ALLOC(kiblnd_data.kib_peers, sizeof(cfs_list_t) * kiblnd_data.kib_peer_hash_size); if (kiblnd_data.kib_peers == NULL) { goto failed; } for (i = 0; i < kiblnd_data.kib_peer_hash_size; i++) CFS_INIT_LIST_HEAD(&kiblnd_data.kib_peers[i]); spin_lock_init(&kiblnd_data.kib_connd_lock); CFS_INIT_LIST_HEAD(&kiblnd_data.kib_connd_conns); CFS_INIT_LIST_HEAD(&kiblnd_data.kib_connd_zombies); init_waitqueue_head(&kiblnd_data.kib_connd_waitq); init_waitqueue_head(&kiblnd_data.kib_failover_waitq); kiblnd_data.kib_scheds = cfs_percpt_alloc(lnet_cpt_table(), sizeof(*sched)); if (kiblnd_data.kib_scheds == NULL) goto failed; cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) { int nthrs; spin_lock_init(&sched->ibs_lock); CFS_INIT_LIST_HEAD(&sched->ibs_conns); init_waitqueue_head(&sched->ibs_waitq); nthrs = cfs_cpt_weight(lnet_cpt_table(), i); if (*kiblnd_tunables.kib_nscheds > 0) { nthrs = min(nthrs, *kiblnd_tunables.kib_nscheds); } else { /* max to half of CPUs, another half is reserved for * upper layer modules */ nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs); } sched->ibs_nthreads_max = nthrs; sched->ibs_cpt = i; } kiblnd_data.kib_error_qpa.qp_state = IB_QPS_ERR; /* lists/ptrs/locks initialised */ kiblnd_data.kib_init = IBLND_INIT_DATA; /*****************************************************/ rc = kiblnd_thread_start(kiblnd_connd, NULL, "kiblnd_connd"); if (rc != 0) { CERROR("Can't spawn o2iblnd connd: %d\n", rc); goto failed; } if (*kiblnd_tunables.kib_dev_failover != 0) rc = kiblnd_thread_start(kiblnd_failover_thread, NULL, "kiblnd_failover"); if (rc != 0) { CERROR("Can't spawn o2iblnd failover thread: %d\n", rc); goto failed; } /* flag everything initialised */ kiblnd_data.kib_init = IBLND_INIT_ALL; /*****************************************************/ return 0; failed: kiblnd_base_shutdown(); return -ENETDOWN; } int kiblnd_start_schedulers(struct kib_sched_info *sched) { int rc = 0; int nthrs; int i; if (sched->ibs_nthreads == 0) { if (*kiblnd_tunables.kib_nscheds > 0) { nthrs = sched->ibs_nthreads_max; } else { nthrs = cfs_cpt_weight(lnet_cpt_table(), sched->ibs_cpt); nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs); nthrs = min(IBLND_N_SCHED_HIGH, nthrs); } } else { LASSERT(sched->ibs_nthreads <= sched->ibs_nthreads_max); /* increase one thread if there is new interface */ nthrs = (sched->ibs_nthreads < sched->ibs_nthreads_max); } for (i = 0; i < nthrs; i++) { long id; char name[20]; id = KIB_THREAD_ID(sched->ibs_cpt, sched->ibs_nthreads + i); snprintf(name, sizeof(name), "kiblnd_sd_%02ld_%02ld", KIB_THREAD_CPT(id), KIB_THREAD_TID(id)); rc = kiblnd_thread_start(kiblnd_scheduler, (void *)id, name); if (rc == 0) continue; CERROR("Can't spawn thread %d for scheduler[%d]: %d\n", sched->ibs_cpt, sched->ibs_nthreads + i, rc); break; } sched->ibs_nthreads += i; return rc; } int kiblnd_dev_start_threads(kib_dev_t *dev, int newdev, __u32 *cpts, int ncpts) { int cpt; int rc; int i; for (i = 0; i < ncpts; i++) { struct kib_sched_info *sched; cpt = (cpts == NULL) ? i : cpts[i]; sched = kiblnd_data.kib_scheds[cpt]; if (!newdev && sched->ibs_nthreads > 0) continue; rc = kiblnd_start_schedulers(kiblnd_data.kib_scheds[cpt]); if (rc != 0) { CERROR("Failed to start scheduler threads for %s\n", dev->ibd_ifname); return rc; } } return 0; } kib_dev_t * kiblnd_dev_search(char *ifname) { kib_dev_t *alias = NULL; kib_dev_t *dev; char *colon; char *colon2; colon = strchr(ifname, ':'); cfs_list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) { if (strcmp(&dev->ibd_ifname[0], ifname) == 0) return dev; if (alias != NULL) continue; colon2 = strchr(dev->ibd_ifname, ':'); if (colon != NULL) *colon = 0; if (colon2 != NULL) *colon2 = 0; if (strcmp(&dev->ibd_ifname[0], ifname) == 0) alias = dev; if (colon != NULL) *colon = ':'; if (colon2 != NULL) *colon2 = ':'; } return alias; } int kiblnd_startup (lnet_ni_t *ni) { char *ifname; kib_dev_t *ibdev = NULL; kib_net_t *net; struct timeval tv; unsigned long flags; int rc; int newdev; LASSERT (ni->ni_lnd == &the_o2iblnd); if (kiblnd_data.kib_init == IBLND_INIT_NOTHING) { rc = kiblnd_base_startup(); if (rc != 0) return rc; } LIBCFS_ALLOC(net, sizeof(*net)); ni->ni_data = net; if (net == NULL) goto failed; memset(net, 0, sizeof(*net)); do_gettimeofday(&tv); net->ibn_incarnation = (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec; ni->ni_peertimeout = *kiblnd_tunables.kib_peertimeout; ni->ni_maxtxcredits = *kiblnd_tunables.kib_credits; ni->ni_peertxcredits = *kiblnd_tunables.kib_peertxcredits; ni->ni_peerrtrcredits = *kiblnd_tunables.kib_peerrtrcredits; if (ni->ni_interfaces[0] != NULL) { /* Use the IPoIB interface specified in 'networks=' */ CLASSERT (LNET_MAX_INTERFACES > 1); if (ni->ni_interfaces[1] != NULL) { CERROR("Multiple interfaces not supported\n"); goto failed; } ifname = ni->ni_interfaces[0]; } else { ifname = *kiblnd_tunables.kib_default_ipif; } if (strlen(ifname) >= sizeof(ibdev->ibd_ifname)) { CERROR("IPoIB interface name too long: %s\n", ifname); goto failed; } ibdev = kiblnd_dev_search(ifname); newdev = ibdev == NULL; /* hmm...create kib_dev even for alias */ if (ibdev == NULL || strcmp(&ibdev->ibd_ifname[0], ifname) != 0) ibdev = kiblnd_create_dev(ifname); if (ibdev == NULL) goto failed; net->ibn_dev = ibdev; ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid), ibdev->ibd_ifip); rc = kiblnd_dev_start_threads(ibdev, newdev, ni->ni_cpts, ni->ni_ncpts); if (rc != 0) goto failed; rc = kiblnd_net_init_pools(net, ni->ni_cpts, ni->ni_ncpts); if (rc != 0) { CERROR("Failed to initialize NI pools: %d\n", rc); goto failed; } write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); ibdev->ibd_nnets++; cfs_list_add_tail(&net->ibn_list, &ibdev->ibd_nets); write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); net->ibn_init = IBLND_INIT_ALL; return 0; failed: if (net != NULL && net->ibn_dev == NULL && ibdev != NULL) kiblnd_destroy_dev(ibdev); kiblnd_shutdown(ni); CDEBUG(D_NET, "kiblnd_startup failed\n"); return -ENETDOWN; } void __exit kiblnd_module_fini (void) { lnet_unregister_lnd(&the_o2iblnd); kiblnd_tunables_fini(); } int __init kiblnd_module_init (void) { int rc; CLASSERT (sizeof(kib_msg_t) <= IBLND_MSG_SIZE); CLASSERT (offsetof(kib_msg_t, ibm_u.get.ibgm_rd.rd_frags[IBLND_MAX_RDMA_FRAGS]) <= IBLND_MSG_SIZE); CLASSERT (offsetof(kib_msg_t, ibm_u.putack.ibpam_rd.rd_frags[IBLND_MAX_RDMA_FRAGS]) <= IBLND_MSG_SIZE); rc = kiblnd_tunables_init(); if (rc != 0) return rc; lnet_register_lnd(&the_o2iblnd); return 0; } MODULE_AUTHOR("Sun Microsystems, Inc. "); MODULE_DESCRIPTION("Kernel OpenIB gen2 LND v2.00"); MODULE_LICENSE("GPL"); module_init(kiblnd_module_init); module_exit(kiblnd_module_fini);