| /* |
| * 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 <eric@bartonsoftware.com> |
| */ |
| |
| #include <asm/div64.h> |
| #include <asm/page.h> |
| #include "o2iblnd.h" |
| |
| static 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; |
| |
| static __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 */ |
| |
| 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); |
| } |
| |
| 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) 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(list_empty(&peer->ibp_conns)); |
| |
| LASSERT(kiblnd_peer_active(peer)); |
| list_del_init(&peer->ibp_list); |
| /* lose peerlist's ref */ |
| kiblnd_peer_decref(peer); |
| } |
| |
| static 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; |
| } |
| |
| static 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. */ |
| } |
| |
| static int kiblnd_del_peer(lnet_ni_t *ni, lnet_nid_t nid) |
| { |
| 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; |
| } |
| |
| static 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; |
| } |
| |
| 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; |
| } |
| |
| static int kiblnd_get_completion_vector(kib_conn_t *conn, int cpt) |
| { |
| cpumask_t *mask; |
| int vectors; |
| int off; |
| int i; |
| lnet_nid_t nid = conn->ibc_peer->ibp_nid; |
| |
| vectors = conn->ibc_cmid->device->num_comp_vectors; |
| if (vectors <= 1) |
| return 0; |
| |
| mask = cfs_cpt_cpumask(lnet_cpt_table(), cpt); |
| if (mask == NULL) |
| return 0; |
| |
| /* hash NID to CPU id in this partition... */ |
| off = do_div(nid, cpumask_weight(mask)); |
| for_each_cpu(i, mask) { |
| if (off-- == 0) |
| return i % vectors; |
| } |
| |
| LBUG(); |
| return 1; |
| } |
| |
| 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; |
| struct ib_cq_init_attr cq_attr = {}; |
| 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; |
| |
| 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_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)) { |
| 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); |
| |
| cq_attr.cqe = IBLND_CQ_ENTRIES(version); |
| cq_attr.comp_vector = kiblnd_get_completion_vector(conn, cpt); |
| cq = ib_create_cq(cmid->device, |
| kiblnd_cq_completion, kiblnd_cq_event, conn, |
| &cq_attr); |
| 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(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_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; |
| 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); |
| |
| 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; |
| 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_version == version && |
| conn->ibc_incarnation == incarnation) |
| continue; |
| |
| CDEBUG(D_NET, |
| "Closing stale conn -> %s version: %x, incarnation:%#llx(%x, %#llx)\n", |
| libcfs_nid2str(peer->ibp_nid), |
| conn->ibc_version, conn->ibc_incarnation, |
| version, incarnation); |
| |
| kiblnd_close_conn_locked(conn, -ESTALE); |
| count++; |
| } |
| |
| return count; |
| } |
| |
| static 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; |
| |
| 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, unsigned long *when) |
| { |
| unsigned long last_alive = 0; |
| unsigned long 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 || |
| !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); |
| } |
| |
| 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] = alloc_pages_node( |
| cfs_cpt_spread_node(lnet_cpt_table(), cpt), |
| GFP_NOFS, 0); |
| 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 %#llx(%#llx)\n", |
| i, rx->rx_msg, rx->rx_msgaddr, |
| (__u64)(page_to_phys(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); |
| |
| 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; |
| } |
| |
| static 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)); |
| } |
| |
| static void kiblnd_destroy_fmr_pool_list(struct list_head *head) |
| { |
| kib_fmr_pool_t *pool; |
| |
| while (!list_empty(head)) { |
| pool = list_entry(head->next, kib_fmr_pool_t, fpo_list); |
| 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); |
| } |
| |
| static 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, |
| struct list_head *zombies) |
| { |
| if (fps->fps_net == NULL) /* intialized? */ |
| return; |
| |
| spin_lock(&fps->fps_lock); |
| |
| while (!list_empty(&fps->fps_pool_list)) { |
| kib_fmr_pool_t *fpo = list_entry(fps->fps_pool_list.next, |
| kib_fmr_pool_t, fpo_list); |
| fpo->fpo_failed = 1; |
| list_del(&fpo->fpo_list); |
| if (fpo->fpo_map_count == 0) |
| list_add(&fpo->fpo_list, zombies); |
| else |
| 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); |
| INIT_LIST_HEAD(&fps->fps_pool_list); |
| INIT_LIST_HEAD(&fps->fps_failed_pool_list); |
| |
| rc = kiblnd_create_fmr_pool(fps, &fpo); |
| if (rc == 0) |
| list_add_tail(&fpo->fpo_list, &fps->fps_pool_list); |
| |
| return rc; |
| } |
| |
| static int kiblnd_fmr_pool_is_idle(kib_fmr_pool_t *fpo, unsigned long 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) |
| { |
| LIST_HEAD(zombies); |
| kib_fmr_pool_t *fpo = fmr->fmr_pool; |
| kib_fmr_poolset_t *fps = fpo->fpo_owner; |
| unsigned long 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 */ |
| |
| 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)) { |
| list_move(&fpo->fpo_list, &zombies); |
| fps->fps_version++; |
| } |
| } |
| spin_unlock(&fps->fps_lock); |
| |
| if (!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; |
| 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 (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++; |
| 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(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)); |
| INIT_LIST_HEAD(&pool->po_free_list); |
| pool->po_deadline = cfs_time_shift(IBLND_POOL_DEADLINE); |
| pool->po_owner = ps; |
| pool->po_size = size; |
| } |
| |
| static void kiblnd_destroy_pool_list(struct list_head *head) |
| { |
| kib_pool_t *pool; |
| |
| while (!list_empty(head)) { |
| pool = list_entry(head->next, kib_pool_t, po_list); |
| 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, struct list_head *zombies) |
| { |
| if (ps->ps_net == NULL) /* intialized? */ |
| return; |
| |
| spin_lock(&ps->ps_lock); |
| while (!list_empty(&ps->ps_pool_list)) { |
| kib_pool_t *po = list_entry(ps->ps_pool_list.next, |
| kib_pool_t, po_list); |
| po->po_failed = 1; |
| list_del(&po->po_list); |
| if (po->po_allocated == 0) |
| list_add(&po->po_list, zombies); |
| else |
| 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); |
| INIT_LIST_HEAD(&ps->ps_pool_list); |
| INIT_LIST_HEAD(&ps->ps_failed_pool_list); |
| |
| rc = ps->ps_pool_create(ps, size, &pool); |
| if (rc == 0) |
| 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, unsigned long 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, struct list_head *node) |
| { |
| LIST_HEAD(zombies); |
| kib_poolset_t *ps = pool->po_owner; |
| kib_pool_t *tmp; |
| unsigned long 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); |
| list_add(node, &pool->po_free_list); |
| pool->po_allocated--; |
| |
| 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)) |
| list_move(&pool->po_list, &zombies); |
| } |
| spin_unlock(&ps->ps_lock); |
| |
| if (!list_empty(&zombies)) |
| kiblnd_destroy_pool_list(&zombies); |
| } |
| |
| struct list_head *kiblnd_pool_alloc_node(kib_poolset_t *ps) |
| { |
| struct list_head *node; |
| kib_pool_t *pool; |
| int rc; |
| |
| again: |
| spin_lock(&ps->ps_lock); |
| list_for_each_entry(pool, &ps->ps_pool_list, po_list) { |
| if (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; |
| 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 (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) { |
| 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; |
| } |
| |
| 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]; |
| |
| 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, struct list_head *node) |
| { |
| kib_tx_poolset_t *tps = container_of(pool->po_owner, kib_tx_poolset_t, |
| tps_poolset); |
| kib_tx_t *tx = list_entry(node, kib_tx_t, tx_list); |
| |
| tx->tx_cookie = tps->tps_next_tx_cookie++; |
| } |
| |
| static 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; |
| |
| 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_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; |
| } |
| } |
| |
| static int kiblnd_net_init_pools(kib_net_t *net, __u32 *cpts, int ncpts) |
| { |
| unsigned long flags; |
| int cpt; |
| int rc = 0; |
| 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, see LU-2268 |
| * for details |
| */ |
| LASSERT(net->ibn_tx_ps == NULL); |
| |
| /* |
| * premapping can fail if ibd_nmr > 1, so we always create |
| * FMR 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; |
| |
| 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\n"); |
| 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: %#llx\n", hdev->ibh_mr_size); |
| return -EINVAL; |
| } |
| |
| static 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)); |
| } |
| |
| static int kiblnd_hdev_setup_mrs(kib_hca_dev_t *hdev) |
| { |
| struct ib_mr *mr; |
| int rc; |
| int acflags = IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE; |
| |
| rc = kiblnd_hdev_get_attr(hdev); |
| if (rc != 0) |
| return rc; |
| |
| 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; |
| |
| return 0; |
| } |
| |
| /* DUMMY */ |
| static int kiblnd_dummy_callback(struct rdma_cm_id *cmid, |
| struct rdma_cm_event *event) |
| { |
| 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:%pI4h to device(%p): %d\n", |
| dev->ibd_ifname, &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) |
| { |
| LIST_HEAD(zombie_tpo); |
| LIST_HEAD(zombie_ppo); |
| LIST_HEAD(zombie_fpo); |
| struct rdma_cm_id *cmid = NULL; |
| kib_hca_dev_t *hdev = NULL; |
| 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:%pI4h to device(%p): %d\n", |
| dev->ibd_ifname, &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); |
| |
| swap(dev->ibd_hdev, hdev); /* take over the refcount */ |
| |
| 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) |
| kiblnd_fail_fmr_poolset(net->ibn_fmr_ps[i], |
| &zombie_fpo); |
| } |
| } |
| |
| write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| out: |
| if (!list_empty(&zombie_tpo)) |
| kiblnd_destroy_pool_list(&zombie_tpo); |
| if (!list_empty(&zombie_ppo)) |
| kiblnd_destroy_pool_list(&zombie_ppo); |
| if (!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(list_empty(&dev->ibd_nets)); |
| |
| list_del(&dev->ibd_fail_list); |
| list_del(&dev->ibd_list); |
| |
| if (dev->ibd_hdev != NULL) |
| kiblnd_hdev_decref(dev->ibd_hdev); |
| |
| LIBCFS_FREE(dev, sizeof(*dev)); |
| } |
| |
| static 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 = lnet_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; |
| |
| netdev = dev_get_by_name(&init_net, ifname); |
| if (netdev == NULL) { |
| dev->ibd_can_failover = 0; |
| } else { |
| dev->ibd_can_failover = !!(netdev->flags & IFF_MASTER); |
| dev_put(netdev); |
| } |
| |
| INIT_LIST_HEAD(&dev->ibd_nets); |
| INIT_LIST_HEAD(&dev->ibd_list); /* not yet in kib_devs */ |
| 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; |
| } |
| |
| list_add_tail(&dev->ibd_list, |
| &kiblnd_data.kib_devs); |
| return dev; |
| } |
| |
| static void kiblnd_base_shutdown(void) |
| { |
| struct kib_sched_info *sched; |
| int i; |
| |
| LASSERT(list_empty(&kiblnd_data.kib_devs)); |
| |
| 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; |
| |
| /* 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++; |
| /* power of 2 ? */ |
| CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, |
| "Waiting for %d threads to terminate\n", |
| atomic_read(&kiblnd_data.kib_nthreads)); |
| set_current_state(TASK_UNINTERRUPTIBLE); |
| schedule_timeout(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); |
| } |
| |
| if (kiblnd_data.kib_scheds != NULL) |
| cfs_percpt_free(kiblnd_data.kib_scheds); |
| |
| 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; |
| |
| 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)); |
| set_current_state(TASK_UNINTERRUPTIBLE); |
| schedule_timeout(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--; |
| 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; |
| } |
| |
| 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(); |
| } |
| |
| static 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); |
| /* zero pointers, flags etc */ |
| memset(&kiblnd_data, 0, sizeof(kiblnd_data)); |
| |
| rwlock_init(&kiblnd_data.kib_global_lock); |
| |
| INIT_LIST_HEAD(&kiblnd_data.kib_devs); |
| 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(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); |
| 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); |
| 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; |
| } |
| |
| static 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; |
| } |
| |
| static 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; |
| } |
| |
| static kib_dev_t *kiblnd_dev_search(char *ifname) |
| { |
| kib_dev_t *alias = NULL; |
| kib_dev_t *dev; |
| char *colon; |
| char *colon2; |
| |
| colon = strchr(ifname, ':'); |
| 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 net_failed; |
| |
| 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++; |
| 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->ibn_dev == NULL && ibdev != NULL) |
| kiblnd_destroy_dev(ibdev); |
| |
| net_failed: |
| kiblnd_shutdown(ni); |
| |
| CDEBUG(D_NET, "kiblnd_startup failed\n"); |
| return -ENETDOWN; |
| } |
| |
| static void __exit kiblnd_module_fini(void) |
| { |
| lnet_unregister_lnd(&the_o2iblnd); |
| } |
| |
| static 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. <http://www.lustre.org/>"); |
| MODULE_DESCRIPTION("Kernel OpenIB gen2 LND v2.00"); |
| MODULE_LICENSE("GPL"); |
| |
| module_init(kiblnd_module_init); |
| module_exit(kiblnd_module_fini); |