/* * -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * 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 [sun.com URL with a * copy of GPLv2]. * * 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 2008 Sun Microsystems, Inc. All rights reserved * Use is subject to license terms. */ /* * 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_kiblnd = { .lnd_type = O2IBLND, .lnd_startup = kiblnd_startup, .lnd_shutdown = kiblnd_shutdown, .lnd_ctl = kiblnd_ctl, .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; } void kiblnd_init_msg (kib_msg_t *msg, int type, int body_nob) { msg->ibm_type = type; msg->ibm_nob = offsetof(kib_msg_t, ibm_u) + body_nob; } void kiblnd_pack_msg (lnet_ni_t *ni, kib_msg_t *msg, 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 = IBLND_MSG_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; int flip; int msg_nob; #if !IBLND_MAP_ON_DEMAND int i; int n; #endif /* 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; } if (msg->ibm_version != (flip ? __swab16(IBLND_MSG_VERSION) : IBLND_MSG_VERSION)) { CERROR("Bad version: %d\n", msg->ibm_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 */ __swab16s(&msg->ibm_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; } switch (msg->ibm_type) { default: CERROR("Unknown message type %x\n", msg->ibm_type); return -EPROTO; case IBLND_MSG_NOOP: break; case IBLND_MSG_IMMEDIATE: if (msg_nob < offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[0])) { CERROR("Short IMMEDIATE: %d(%d)\n", msg_nob, (int)offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[0])); return -EPROTO; } break; case IBLND_MSG_PUT_REQ: if (msg_nob < hdr_size + sizeof(msg->ibm_u.putreq)) { CERROR("Short PUT_REQ: %d(%d)\n", msg_nob, (int)(hdr_size + sizeof(msg->ibm_u.putreq))); return -EPROTO; } break; case IBLND_MSG_PUT_ACK: if (msg_nob < hdr_size + sizeof(msg->ibm_u.putack)) { CERROR("Short PUT_ACK: %d(%d)\n", msg_nob, (int)(hdr_size + sizeof(msg->ibm_u.putack))); return -EPROTO; } #if IBLND_MAP_ON_DEMAND if (flip) { __swab64s(&msg->ibm_u.putack.ibpam_rd.rd_addr); __swab32s(&msg->ibm_u.putack.ibpam_rd.rd_nob); __swab32s(&msg->ibm_u.putack.ibpam_rd.rd_key); } #else if (flip) { __swab32s(&msg->ibm_u.putack.ibpam_rd.rd_key); __swab32s(&msg->ibm_u.putack.ibpam_rd.rd_nfrags); } n = msg->ibm_u.putack.ibpam_rd.rd_nfrags; if (n <= 0 || n > IBLND_MAX_RDMA_FRAGS) { CERROR("Bad PUT_ACK nfrags: %d, should be 0 < n <= %d\n", n, IBLND_MAX_RDMA_FRAGS); return -EPROTO; } if (msg_nob < offsetof(kib_msg_t, ibm_u.putack.ibpam_rd.rd_frags[n])) { CERROR("Short PUT_ACK: %d(%d)\n", msg_nob, (int)offsetof(kib_msg_t, ibm_u.putack.ibpam_rd.rd_frags[n])); return -EPROTO; } if (flip) { for (i = 0; i < n; i++) { __swab32s(&msg->ibm_u.putack.ibpam_rd.rd_frags[i].rf_nob); __swab64s(&msg->ibm_u.putack.ibpam_rd.rd_frags[i].rf_addr); } } #endif break; case IBLND_MSG_GET_REQ: if (msg_nob < hdr_size + sizeof(msg->ibm_u.get)) { CERROR("Short GET_REQ: %d(%d)\n", msg_nob, (int)(hdr_size + sizeof(msg->ibm_u.get))); return -EPROTO; } #if IBLND_MAP_ON_DEMAND if (flip) { __swab64s(&msg->ibm_u.get.ibgm_rd.rd_addr); __swab32s(&msg->ibm_u.get.ibgm_rd.rd_nob); __swab32s(&msg->ibm_u.get.ibgm_rd.rd_key); } #else if (flip) { __swab32s(&msg->ibm_u.get.ibgm_rd.rd_key); __swab32s(&msg->ibm_u.get.ibgm_rd.rd_nfrags); } n = msg->ibm_u.get.ibgm_rd.rd_nfrags; if (n <= 0 || n > IBLND_MAX_RDMA_FRAGS) { CERROR("Bad GET_REQ nfrags: %d, should be 0 < n <= %d\n", n, IBLND_MAX_RDMA_FRAGS); return -EPROTO; } if (msg_nob < offsetof(kib_msg_t, ibm_u.get.ibgm_rd.rd_frags[n])) { CERROR("Short GET_REQ: %d(%d)\n", msg_nob, (int)offsetof(kib_msg_t, ibm_u.get.ibgm_rd.rd_frags[n])); return -EPROTO; } if (flip) for (i = 0; i < msg->ibm_u.get.ibgm_rd.rd_nfrags; i++) { __swab32s(&msg->ibm_u.get.ibgm_rd.rd_frags[i].rf_nob); __swab64s(&msg->ibm_u.get.ibgm_rd.rd_frags[i].rf_addr); } #endif break; case IBLND_MSG_PUT_NAK: case IBLND_MSG_PUT_DONE: case IBLND_MSG_GET_DONE: if (msg_nob < hdr_size + sizeof(msg->ibm_u.completion)) { CERROR("Short RDMA completion: %d(%d)\n", msg_nob, (int)(hdr_size + sizeof(msg->ibm_u.completion))); return -EPROTO; } if (flip) __swab32s(&msg->ibm_u.completion.ibcm_status); break; case IBLND_MSG_CONNREQ: case IBLND_MSG_CONNACK: if (msg_nob < hdr_size + sizeof(msg->ibm_u.connparams)) { CERROR("Short connreq/ack: %d(%d)\n", msg_nob, (int)(hdr_size + sizeof(msg->ibm_u.connparams))); return -EPROTO; } 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; unsigned long flags; LASSERT (net != NULL); LASSERT (nid != LNET_NID_ANY); LIBCFS_ALLOC(peer, 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 = cfs_time_current(); atomic_set(&peer->ibp_refcount, 1); /* 1 ref for caller */ INIT_LIST_HEAD(&peer->ibp_list); /* not in the peer table yet */ INIT_LIST_HEAD(&peer->ibp_conns); 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 (list_empty(&peer->ibp_conns)); LASSERT (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); } void kiblnd_destroy_dev (kib_dev_t *dev) { LASSERT (dev->ibd_nnets == 0); if (!list_empty(&dev->ibd_list)) /* on kib_devs? */ list_del_init(&dev->ibd_list); if (dev->ibd_mr != NULL) ib_dereg_mr(dev->ibd_mr); if (dev->ibd_pd != NULL) ib_dealloc_pd(dev->ibd_pd); if (dev->ibd_cmid != NULL) rdma_destroy_id(dev->ibd_cmid); LIBCFS_FREE(dev, sizeof(*dev)); } kib_peer_t * kiblnd_find_peer_locked (lnet_nid_t nid) { /* the caller is responsible for accounting the additional reference * that this creates */ struct list_head *peer_list = kiblnd_nid2peerlist(nid); struct list_head *tmp; kib_peer_t *peer; list_for_each (tmp, peer_list) { peer = list_entry(tmp, kib_peer_t, ibp_list); LASSERT (peer->ibp_connecting > 0 || /* creating conns */ peer->ibp_accepting > 0 || !list_empty(&peer->ibp_conns)); /* active conn */ if (peer->ibp_nid != nid) continue; CDEBUG(D_NET, "got peer [%p] -> %s (%d)\n", peer, libcfs_nid2str(nid), atomic_read(&peer->ibp_refcount)); return peer; } return NULL; } void kiblnd_unlink_peer_locked (kib_peer_t *peer) { LASSERT (list_empty(&peer->ibp_conns)); LASSERT (kiblnd_peer_active(peer)); 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; struct list_head *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++) { list_for_each (ptmp, &kiblnd_data.kib_peers[i]) { peer = list_entry(ptmp, kib_peer_t, ibp_list); LASSERT (peer->ibp_connecting > 0 || peer->ibp_accepting > 0 || !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) { struct list_head *ctmp; struct list_head *cnxt; kib_conn_t *conn; if (list_empty(&peer->ibp_conns)) { kiblnd_unlink_peer_locked(peer); } else { list_for_each_safe (ctmp, cnxt, &peer->ibp_conns) { conn = 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); struct list_head *ptmp; struct list_head *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++) { list_for_each_safe (ptmp, pnxt, &kiblnd_data.kib_peers[i]) { peer = list_entry(ptmp, kib_peer_t, ibp_list); LASSERT (peer->ibp_connecting > 0 || peer->ibp_accepting > 0 || !list_empty(&peer->ibp_conns)); if (peer->ibp_ni != ni) continue; if (!(nid == LNET_NID_ANY || peer->ibp_nid == nid)) continue; if (!list_empty(&peer->ibp_tx_queue)) { LASSERT (list_empty(&peer->ibp_conns)); 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; struct list_head *ptmp; kib_conn_t *conn; struct list_head *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++) { list_for_each (ptmp, &kiblnd_data.kib_peers[i]) { peer = list_entry(ptmp, kib_peer_t, ibp_list); LASSERT (peer->ibp_connecting > 0 || peer->ibp_accepting > 0 || !list_empty(&peer->ibp_conns)); if (peer->ibp_ni != ni) continue; list_for_each (ctmp, &peer->ibp_conns) { if (index-- > 0) continue; conn = 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) { struct list_head *tmp; int i; spin_lock(&conn->ibc_lock); CDEBUG(D_CONSOLE, "conn[%d] %p -> %s: \n", atomic_read(&conn->ibc_refcount), conn, libcfs_nid2str(conn->ibc_peer->ibp_nid)); CDEBUG(D_CONSOLE, " state %d nposted %d cred %d o_cred %d r_cred %d\n", conn->ibc_state, 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"); list_for_each(tmp, &conn->ibc_early_rxs) kiblnd_debug_rx(list_entry(tmp, kib_rx_t, rx_list)); CDEBUG(D_CONSOLE, " tx_noops:\n"); list_for_each(tmp, &conn->ibc_tx_noops) kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list)); CDEBUG(D_CONSOLE, " tx_queue_nocred:\n"); list_for_each(tmp, &conn->ibc_tx_queue_nocred) kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list)); CDEBUG(D_CONSOLE, " tx_queue_rsrvd:\n"); list_for_each(tmp, &conn->ibc_tx_queue_rsrvd) kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list)); CDEBUG(D_CONSOLE, " tx_queue:\n"); list_for_each(tmp, &conn->ibc_tx_queue) kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list)); CDEBUG(D_CONSOLE, " active_txs:\n"); list_for_each(tmp, &conn->ibc_active_txs) kiblnd_debug_tx(list_entry(tmp, kib_tx_t, tx_list)); CDEBUG(D_CONSOLE, " rxs:\n"); for (i = 0; i < IBLND_RX_MSGS; i++) kiblnd_debug_rx(&conn->ibc_rxs[i]); spin_unlock(&conn->ibc_lock); } kib_conn_t * kiblnd_create_conn (kib_peer_t *peer, struct rdma_cm_id *cmid, int state) { /* 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'). */ kib_conn_t *conn; kib_net_t *net = peer->ibp_ni->ni_data; int i; int page_offset; int ipage; int rc; struct ib_cq *cq; struct ib_qp_init_attr *init_qp_attr; unsigned long flags; LASSERT (net != NULL); LASSERT (!in_interrupt()); LIBCFS_ALLOC(init_qp_attr, 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_ALLOC(conn, sizeof(*conn)); if (conn == NULL) { CERROR("Can't allocate connection for %s\n", libcfs_nid2str(peer->ibp_nid)); goto failed_1; } memset(conn, 0, sizeof(*conn)); /* zero flags, NULL pointers etc... */ conn->ibc_state = IBLND_CONN_INIT; conn->ibc_peer = peer; /* I take the caller's ref */ cmid->context = conn; /* for future CM callbacks */ conn->ibc_cmid = cmid; INIT_LIST_HEAD(&conn->ibc_early_rxs); INIT_LIST_HEAD(&conn->ibc_tx_noops); INIT_LIST_HEAD(&conn->ibc_tx_queue); INIT_LIST_HEAD(&conn->ibc_tx_queue_rsrvd); INIT_LIST_HEAD(&conn->ibc_tx_queue_nocred); INIT_LIST_HEAD(&conn->ibc_active_txs); spin_lock_init(&conn->ibc_lock); LIBCFS_ALLOC(conn->ibc_connvars, sizeof(*conn->ibc_connvars)); if (conn->ibc_connvars == NULL) { CERROR("Can't allocate in-progress connection state\n"); goto failed_2; } memset(conn->ibc_connvars, 0, sizeof(*conn->ibc_connvars)); LIBCFS_ALLOC(conn->ibc_rxs, IBLND_RX_MSGS * sizeof(kib_rx_t)); if (conn->ibc_rxs == NULL) { CERROR("Cannot allocate RX buffers\n"); goto failed_2; } memset(conn->ibc_rxs, 0, IBLND_RX_MSGS * sizeof(kib_rx_t)); rc = kiblnd_alloc_pages(&conn->ibc_rx_pages, IBLND_RX_MSG_PAGES); if (rc != 0) goto failed_2; for (i = ipage = page_offset = 0; i < IBLND_RX_MSGS; i++) { struct page *page = conn->ibc_rx_pages->ibp_pages[ipage]; kib_rx_t *rx = &conn->ibc_rxs[i]; rx->rx_conn = conn; rx->rx_msg = (kib_msg_t *)(((char *)page_address(page)) + page_offset); rx->rx_msgaddr = kiblnd_dma_map_single(cmid->device, rx->rx_msg, IBLND_MSG_SIZE, DMA_FROM_DEVICE); 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(page) + page_offset); page_offset += IBLND_MSG_SIZE; LASSERT (page_offset <= PAGE_SIZE); if (page_offset == PAGE_SIZE) { page_offset = 0; ipage++; LASSERT (ipage <= IBLND_RX_MSG_PAGES); } } #ifdef HAVE_OFED_IB_COMP_VECTOR cq = ib_create_cq(cmid->device, kiblnd_cq_completion, kiblnd_cq_event, conn, IBLND_CQ_ENTRIES(), 0); #else cq = ib_create_cq(cmid->device, kiblnd_cq_completion, kiblnd_cq_event, conn, IBLND_CQ_ENTRIES()); #endif if (!IS_ERR(cq)) { conn->ibc_cq = cq; } else { CERROR("Can't create CQ: %ld\n", PTR_ERR(cq)); goto failed_2; } 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; } memset(init_qp_attr, 0, sizeof(*init_qp_attr)); init_qp_attr->event_handler = kiblnd_qp_event; init_qp_attr->qp_context = conn; init_qp_attr->cap.max_send_wr = IBLND_SEND_WRS; init_qp_attr->cap.max_recv_wr = IBLND_RECV_WRS; 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; rc = 0; write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); switch (*kiblnd_tunables.kib_ib_mtu) { default: rc = *kiblnd_tunables.kib_ib_mtu; /* fall through to... */ case 0: /* set tunable to the default * CAVEAT EMPTOR! this assumes the default is one of the MTUs * below, otherwise we'll WARN on the next QP create */ *kiblnd_tunables.kib_ib_mtu = ib_mtu_enum_to_int(cmid->route.path_rec->mtu); break; case 256: cmid->route.path_rec->mtu = IB_MTU_256; break; case 512: cmid->route.path_rec->mtu = IB_MTU_512; break; case 1024: cmid->route.path_rec->mtu = IB_MTU_1024; break; case 2048: cmid->route.path_rec->mtu = IB_MTU_2048; break; case 4096: cmid->route.path_rec->mtu = IB_MTU_4096; break; } write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); if (rc != 0) CWARN("Invalid IB MTU value %d, using default value %d\n", rc, *kiblnd_tunables.kib_ib_mtu); rc = rdma_create_qp(cmid, net->ibn_dev->ibd_pd, init_qp_attr); if (rc != 0) { CERROR("Can't create QP: %d\n", rc); 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); conn->ibc_nrx = IBLND_RX_MSGS; /* post receives */ for (i = 0; i < IBLND_RX_MSGS; 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(&kiblnd_data.kib_sched_lock, flags); conn->ibc_nrx -= IBLND_RX_MSGS - i; spin_unlock_irqrestore(&kiblnd_data.kib_sched_lock, flags); /* Drop my own and unused rxbuffer refcounts */ while (i++ <= IBLND_RX_MSGS) 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; int i; LASSERT (!in_interrupt()); LASSERT (atomic_read(&conn->ibc_refcount) == 0); LASSERT (list_empty(&conn->ibc_early_rxs)); LASSERT (list_empty(&conn->ibc_tx_noops)); LASSERT (list_empty(&conn->ibc_tx_queue)); LASSERT (list_empty(&conn->ibc_tx_queue_rsrvd)); LASSERT (list_empty(&conn->ibc_tx_queue_nocred)); LASSERT (list_empty(&conn->ibc_active_txs)); 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; } if (conn->ibc_cmid->qp != NULL) rdma_destroy_qp(conn->ibc_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) { LASSERT (conn->ibc_rxs != NULL); for (i = 0; i < IBLND_RX_MSGS; i++) { kib_rx_t *rx = &conn->ibc_rxs[i]; LASSERT (rx->rx_nob >= 0); /* not posted */ kiblnd_dma_unmap_single(conn->ibc_cmid->device, KIBLND_UNMAP_ADDR(rx, rx_msgunmap, rx->rx_msgaddr), IBLND_MSG_SIZE, DMA_FROM_DEVICE); } kiblnd_free_pages(conn->ibc_rx_pages); } if (conn->ibc_rxs != NULL) { LIBCFS_FREE(conn->ibc_rxs, IBLND_RX_MSGS * sizeof(kib_rx_t)); } if (conn->ibc_connvars != NULL) LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars)); /* 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; struct list_head *ctmp; struct list_head *cnxt; int count = 0; list_for_each_safe (ctmp, cnxt, &peer->ibp_conns) { conn = list_entry(ctmp, kib_conn_t, ibc_list); count++; kiblnd_close_conn_locked(conn, why); } return count; } int kiblnd_close_stale_conns_locked (kib_peer_t *peer, __u64 incarnation) { kib_conn_t *conn; struct list_head *ctmp; struct list_head *cnxt; int count = 0; list_for_each_safe (ctmp, cnxt, &peer->ibp_conns) { conn = list_entry(ctmp, kib_conn_t, ibc_list); if (conn->ibc_incarnation == incarnation) continue; CDEBUG(D_NET, "Closing stale conn -> %s incarnation:"LPX64"("LPX64")\n", libcfs_nid2str(peer->ibp_nid), conn->ibc_incarnation, incarnation); count++; kiblnd_close_conn_locked(conn, -ESTALE); } return count; } int kiblnd_close_matching_conns (lnet_ni_t *ni, lnet_nid_t nid) { kib_peer_t *peer; struct list_head *ptmp; struct list_head *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++) { list_for_each_safe (ptmp, pnxt, &kiblnd_data.kib_peers[i]) { peer = list_entry(ptmp, kib_peer_t, ibp_list); LASSERT (peer->ibp_connecting > 0 || peer->ibp_accepting > 0 || !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 = kiblnd_get_conn_by_idx(ni, data->ioc_count); if (conn == NULL) { rc = -ENOENT; } else { // kiblnd_debug_conn(conn); rc = 0; data->ioc_nid = conn->ibc_peer->ibp_nid; 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_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 npages) { kib_pages_t *p; int i; LIBCFS_ALLOC(p, 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] = alloc_page(GFP_KERNEL); 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_free_tx_descs (lnet_ni_t *ni) { int i; kib_net_t *net = ni->ni_data; LASSERT (net != NULL); if (net->ibn_tx_descs != NULL) { for (i = 0; i < IBLND_TX_MSGS(); i++) { kib_tx_t *tx = &net->ibn_tx_descs[i]; #if IBLND_MAP_ON_DEMAND if (tx->tx_pages != NULL) LIBCFS_FREE(tx->tx_pages, LNET_MAX_IOV * sizeof(*tx->tx_pages)); #else 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])); if (tx->tx_frags != NULL) LIBCFS_FREE(tx->tx_frags, IBLND_MAX_RDMA_FRAGS * sizeof(*tx->tx_frags)); #endif } LIBCFS_FREE(net->ibn_tx_descs, IBLND_TX_MSGS() * sizeof(kib_tx_t)); } if (net->ibn_tx_pages != NULL) kiblnd_free_pages(net->ibn_tx_pages); } int kiblnd_alloc_tx_descs (lnet_ni_t *ni) { int i; int rc; kib_net_t *net = ni->ni_data; LASSERT (net != NULL); rc = kiblnd_alloc_pages(&net->ibn_tx_pages, IBLND_TX_MSG_PAGES()); if (rc != 0) { CERROR("Can't allocate tx pages\n"); return rc; } LIBCFS_ALLOC (net->ibn_tx_descs, IBLND_TX_MSGS() * sizeof(kib_tx_t)); if (net->ibn_tx_descs == NULL) { CERROR("Can't allocate %d tx descriptors\n", IBLND_TX_MSGS()); return -ENOMEM; } memset(net->ibn_tx_descs, 0, IBLND_TX_MSGS() * sizeof(kib_tx_t)); for (i = 0; i < IBLND_TX_MSGS(); i++) { kib_tx_t *tx = &net->ibn_tx_descs[i]; #if IBLND_MAP_ON_DEMAND LIBCFS_ALLOC(tx->tx_pages, LNET_MAX_IOV * sizeof(*tx->tx_pages)); if (tx->tx_pages == NULL) { CERROR("Can't allocate phys page vector[%d]\n", LNET_MAX_IOV); return -ENOMEM; } #else LIBCFS_ALLOC(tx->tx_wrq, (1 + IBLND_MAX_RDMA_FRAGS) * sizeof(*tx->tx_wrq)); if (tx->tx_wrq == NULL) return -ENOMEM; LIBCFS_ALLOC(tx->tx_sge, (1 + IBLND_MAX_RDMA_FRAGS) * sizeof(*tx->tx_sge)); if (tx->tx_sge == NULL) return -ENOMEM; LIBCFS_ALLOC(tx->tx_rd, offsetof(kib_rdma_desc_t, rd_frags[IBLND_MAX_RDMA_FRAGS])); if (tx->tx_rd == NULL) return -ENOMEM; LIBCFS_ALLOC(tx->tx_frags, IBLND_MAX_RDMA_FRAGS * sizeof(*tx->tx_frags)); if (tx->tx_frags == NULL) return -ENOMEM; #endif } return 0; } void kiblnd_unmap_tx_descs (lnet_ni_t *ni) { int i; kib_tx_t *tx; kib_net_t *net = ni->ni_data; LASSERT (net != NULL); for (i = 0; i < IBLND_TX_MSGS(); i++) { tx = &net->ibn_tx_descs[i]; kiblnd_dma_unmap_single(net->ibn_dev->ibd_cmid->device, KIBLND_UNMAP_ADDR(tx, tx_msgunmap, tx->tx_msgaddr), IBLND_MSG_SIZE, DMA_TO_DEVICE); } } void kiblnd_map_tx_descs (lnet_ni_t *ni) { int ipage = 0; int page_offset = 0; int i; struct page *page; kib_tx_t *tx; kib_net_t *net = ni->ni_data; LASSERT (net != NULL); /* 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); for (i = 0; i < IBLND_TX_MSGS(); i++) { page = net->ibn_tx_pages->ibp_pages[ipage]; tx = &net->ibn_tx_descs[i]; tx->tx_msg = (kib_msg_t *)(((char *)page_address(page)) + page_offset); tx->tx_msgaddr = kiblnd_dma_map_single( net->ibn_dev->ibd_cmid->device, tx->tx_msg, IBLND_MSG_SIZE, DMA_TO_DEVICE); KIBLND_UNMAP_ADDR_SET(tx, tx_msgunmap, tx->tx_msgaddr); list_add(&tx->tx_list, &net->ibn_idle_txs); page_offset += IBLND_MSG_SIZE; LASSERT (page_offset <= PAGE_SIZE); if (page_offset == PAGE_SIZE) { page_offset = 0; ipage++; LASSERT (ipage <= IBLND_TX_MSG_PAGES()); } } } void kiblnd_base_shutdown (void) { int i; LASSERT (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 (list_empty(&kiblnd_data.kib_peers[i])); } LASSERT (list_empty(&kiblnd_data.kib_connd_zombies)); LASSERT (list_empty(&kiblnd_data.kib_connd_conns)); /* flag threads to terminate; wake and wait for them to die */ kiblnd_data.kib_shutdown = 1; wake_up_all(&kiblnd_data.kib_sched_waitq); wake_up_all(&kiblnd_data.kib_connd_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(struct list_head) * kiblnd_data.kib_peer_hash_size); CDEBUG(D_MALLOC, "after LND base cleanup: kmem %d\n", atomic_read(&libcfs_kmemory)); kiblnd_data.kib_init = IBLND_INIT_NOTHING; PORTAL_MODULE_UNUSE; } 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_unmap_tx_descs(ni); LASSERT (net->ibn_dev->ibd_nnets > 0); net->ibn_dev->ibd_nnets--; /* fall through */ case IBLND_INIT_NOTHING: LASSERT (atomic_read(&net->ibn_nconns) == 0); #if IBLND_MAP_ON_DEMAND if (net->ibn_fmrpool != NULL) ib_destroy_fmr_pool(net->ibn_fmrpool); #endif if (net->ibn_dev != NULL && net->ibn_dev->ibd_nnets == 0) kiblnd_destroy_dev(net->ibn_dev); break; } kiblnd_free_tx_descs(ni); 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 (list_empty(&kiblnd_data.kib_devs)) kiblnd_base_shutdown(); return; } int kiblnd_base_startup (void) { int rc; int i; LASSERT (kiblnd_data.kib_init == IBLND_INIT_NOTHING); if (*kiblnd_tunables.kib_credits > *kiblnd_tunables.kib_ntx) { CERROR("Can't set credits(%d) > ntx(%d)\n", *kiblnd_tunables.kib_credits, *kiblnd_tunables.kib_ntx); return -EINVAL; } PORTAL_MODULE_USE; memset(&kiblnd_data, 0, sizeof(kiblnd_data)); /* zero pointers, flags etc */ rwlock_init(&kiblnd_data.kib_global_lock); INIT_LIST_HEAD(&kiblnd_data.kib_devs); kiblnd_data.kib_peer_hash_size = IBLND_PEER_HASH_SIZE; LIBCFS_ALLOC(kiblnd_data.kib_peers, sizeof(struct list_head) * 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++) INIT_LIST_HEAD(&kiblnd_data.kib_peers[i]); spin_lock_init(&kiblnd_data.kib_connd_lock); INIT_LIST_HEAD(&kiblnd_data.kib_connd_conns); INIT_LIST_HEAD(&kiblnd_data.kib_connd_zombies); init_waitqueue_head(&kiblnd_data.kib_connd_waitq); spin_lock_init(&kiblnd_data.kib_sched_lock); INIT_LIST_HEAD(&kiblnd_data.kib_sched_conns); init_waitqueue_head(&kiblnd_data.kib_sched_waitq); kiblnd_data.kib_error_qpa.qp_state = IB_QPS_ERR; /* lists/ptrs/locks initialised */ kiblnd_data.kib_init = IBLND_INIT_DATA; /*****************************************************/ for (i = 0; i < IBLND_N_SCHED; i++) { rc = kiblnd_thread_start(kiblnd_scheduler, (void *)((long)i)); if (rc != 0) { CERROR("Can't spawn o2iblnd scheduler[%d]: %d\n", i, rc); goto failed; } } rc = kiblnd_thread_start(kiblnd_connd, NULL); if (rc != 0) { CERROR("Can't spawn o2iblnd connd: %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_startup (lnet_ni_t *ni) { char *ifname; kib_net_t *net; kib_dev_t *ibdev; struct list_head *tmp; struct timeval tv; int rc; LASSERT (ni->ni_lnd == &the_kiblnd); 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_maxtxcredits = *kiblnd_tunables.kib_credits; ni->ni_peertxcredits = *kiblnd_tunables.kib_peercredits; spin_lock_init(&net->ibn_tx_lock); INIT_LIST_HEAD(&net->ibn_idle_txs); rc = kiblnd_alloc_tx_descs(ni); if (rc != 0) { CERROR("Can't allocate tx descs\n"); goto failed; } 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 = NULL; list_for_each (tmp, &kiblnd_data.kib_devs) { ibdev = list_entry(tmp, kib_dev_t, ibd_list); if (!strcmp(&ibdev->ibd_ifname[0], ifname)) break; ibdev = NULL; } if (ibdev == NULL) { __u32 ip; __u32 netmask; int up; struct rdma_cm_id *id; struct ib_pd *pd; struct ib_mr *mr; struct sockaddr_in addr; rc = libcfs_ipif_query(ifname, &up, &ip, &netmask); if (rc != 0) { CERROR("Can't query IPoIB interface %s: %d\n", ifname, rc); goto failed; } if (!up) { CERROR("Can't query IPoIB interface %s: it's down\n", ifname); goto failed; } LIBCFS_ALLOC(ibdev, sizeof(*ibdev)); if (ibdev == NULL) goto failed; memset(ibdev, 0, sizeof(*ibdev)); INIT_LIST_HEAD(&ibdev->ibd_list); /* not yet in kib_devs */ ibdev->ibd_ifip = ip; strcpy(&ibdev->ibd_ifname[0], ifname); id = rdma_create_id(kiblnd_cm_callback, ibdev, RDMA_PS_TCP); if (!IS_ERR(id)) { ibdev->ibd_cmid = id; } else { CERROR("Can't create listen ID: %ld\n", PTR_ERR(id)); goto failed; } memset(&addr, 0, sizeof(addr)); addr.sin_family = AF_INET; addr.sin_port = htons(*kiblnd_tunables.kib_service); addr.sin_addr.s_addr = htonl(ip); rc = rdma_bind_addr(id, (struct sockaddr *)&addr); if (rc != 0) { CERROR("Can't bind to %s: %d\n", ifname, rc); goto failed; } /* Binding should have assigned me an IB device */ LASSERT (id->device != NULL); pd = ib_alloc_pd(id->device); if (!IS_ERR(pd)) { ibdev->ibd_pd = pd; } else { CERROR("Can't allocate PD: %ld\n", PTR_ERR(pd)); goto failed; } #if IBLND_MAP_ON_DEMAND /* MR for sends and receives */ mr = ib_get_dma_mr(pd, IB_ACCESS_LOCAL_WRITE); #else /* MR for sends, recieves _and_ RDMA...........v */ mr = ib_get_dma_mr(pd, IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE); #endif if (!IS_ERR(mr)) { ibdev->ibd_mr = mr; } else { CERROR("Can't get MR: %ld\n", PTR_ERR(mr)); goto failed; } rc = rdma_listen(id, 0); if (rc != 0) { CERROR("Can't start listener: %d\n", rc); goto failed; } list_add_tail(&ibdev->ibd_list, &kiblnd_data.kib_devs); } ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid), ibdev->ibd_ifip); net->ibn_dev = ibdev; #if IBLND_MAP_ON_DEMAND /* FMR pool for RDMA */ { struct ib_fmr_pool *fmrpool; 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 = *kiblnd_tunables.kib_fmr_pool_size, .dirty_watermark = *kiblnd_tunables.kib_fmr_flush_trigger, .flush_function = NULL, .flush_arg = NULL, .cache = *kiblnd_tunables.kib_fmr_cache}; if (*kiblnd_tunables.kib_fmr_pool_size < *kiblnd_tunables.kib_ntx) { CERROR("Can't set fmr pool size (%d) < ntx(%d)\n", *kiblnd_tunables.kib_fmr_pool_size, *kiblnd_tunables.kib_ntx); goto failed; } fmrpool = ib_create_fmr_pool(ibdev->ibd_pd, ¶m); if (!IS_ERR(fmrpool)) { net->ibn_fmrpool = fmrpool; } else { CERROR("Can't create FMR pool: %ld\n", PTR_ERR(fmrpool)); goto failed; } } #endif kiblnd_map_tx_descs(ni); ibdev->ibd_nnets++; net->ibn_init = IBLND_INIT_ALL; return 0; failed: kiblnd_shutdown(ni); CDEBUG(D_NET, "kiblnd_startup failed\n"); return -ENETDOWN; } void __exit kiblnd_module_fini (void) { lnet_unregister_lnd(&the_kiblnd); kiblnd_tunables_fini(); } int __init kiblnd_module_init (void) { int rc; CLASSERT (sizeof(kib_msg_t) <= IBLND_MSG_SIZE); #if !IBLND_MAP_ON_DEMAND 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); #endif rc = kiblnd_tunables_init(); if (rc != 0) return rc; lnet_register_lnd(&the_kiblnd); return 0; } MODULE_AUTHOR("Sun Microsystems, Inc. "); MODULE_DESCRIPTION("Kernel OpenIB gen2 LND v1.00"); MODULE_LICENSE("GPL"); module_init(kiblnd_module_init); module_exit(kiblnd_module_fini);