+++ /dev/null
-/* -*- 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
- * 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) 2004, 2010, Oracle and/or its affiliates. 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/iiblnd/iiblnd_cb.c
- *
- * Author: Eric Barton <eric@bartonsoftware.com>
- */
-
-#include "iiblnd.h"
-
-void
-hexdump(char *string, void *ptr, int len)
-{
- unsigned char *c = ptr;
- int i;
-
- return;
-
- if (len < 0 || len > 2048) {
- printk("XXX what the hell? %d\n",len);
- return;
- }
-
- printk("%d bytes of '%s' from 0x%p\n", len, string, ptr);
-
- for (i = 0; i < len;) {
- printk("%02x",*(c++));
- i++;
- if (!(i & 15)) {
- printk("\n");
- } else if (!(i&1)) {
- printk(" ");
- }
- }
-
- if(len & 15) {
- printk("\n");
- }
-}
-
-void
-kibnal_tx_done (kib_tx_t *tx)
-{
- lnet_msg_t *lntmsg[2];
- int rc = tx->tx_status;
- int i;
-
- LASSERT (!in_interrupt());
- LASSERT (!tx->tx_queued); /* mustn't be queued for sending */
- LASSERT (tx->tx_sending == 0); /* mustn't be awaiting sent callback */
- LASSERT (!tx->tx_waiting); /* mustn't be awaiting peer response */
-
-#if IBNAL_USE_FMR
- /* Handle unmapping if required */
-#endif
- /* tx may have up to 2 lnet msgs to finalise */
- lntmsg[0] = tx->tx_lntmsg[0]; tx->tx_lntmsg[0] = NULL;
- lntmsg[1] = tx->tx_lntmsg[1]; tx->tx_lntmsg[1] = NULL;
-
- if (tx->tx_conn != NULL) {
- kibnal_conn_decref(tx->tx_conn);
- tx->tx_conn = NULL;
- }
-
- tx->tx_nwrq = 0;
- tx->tx_status = 0;
-
- spin_lock(&kibnal_data.kib_tx_lock);
-
- list_add (&tx->tx_list, &kibnal_data.kib_idle_txs);
-
- spin_unlock(&kibnal_data.kib_tx_lock);
-
- /* delay finalize until my descs have been freed */
- for (i = 0; i < 2; i++) {
- if (lntmsg[i] == NULL)
- continue;
-
- lnet_finalize (kibnal_data.kib_ni, lntmsg[i], rc);
- }
-}
-
-kib_tx_t *
-kibnal_get_idle_tx (void)
-{
- kib_tx_t *tx;
-
- spin_lock(&kibnal_data.kib_tx_lock);
-
- if (list_empty (&kibnal_data.kib_idle_txs)) {
- spin_unlock(&kibnal_data.kib_tx_lock);
- return NULL;
- }
-
- tx = list_entry (kibnal_data.kib_idle_txs.next, kib_tx_t, tx_list);
- list_del (&tx->tx_list);
-
- /* Allocate a new completion cookie. It might not be needed,
- * but we've got a lock right now and we're unlikely to
- * wrap... */
- tx->tx_cookie = kibnal_data.kib_next_tx_cookie++;
-
- spin_unlock(&kibnal_data.kib_tx_lock);
-
- LASSERT (tx->tx_nwrq == 0);
- LASSERT (!tx->tx_queued);
- LASSERT (tx->tx_sending == 0);
- LASSERT (!tx->tx_waiting);
- LASSERT (tx->tx_status == 0);
- LASSERT (tx->tx_conn == NULL);
- LASSERT (tx->tx_lntmsg[0] == NULL);
- LASSERT (tx->tx_lntmsg[1] == NULL);
-
- return tx;
-}
-
-int
-kibnal_post_rx (kib_rx_t *rx, int credit, int rsrvd_credit)
-{
- kib_conn_t *conn = rx->rx_conn;
- int rc = 0;
- FSTATUS frc;
-
- LASSERT (!in_interrupt());
- /* old peers don't reserve rxs for RDMA replies */
- LASSERT (!rsrvd_credit ||
- conn->ibc_version != IBNAL_MSG_VERSION_RDMAREPLYNOTRSRVD);
-
- rx->rx_gl = (IB_LOCAL_DATASEGMENT) {
- .Address = rx->rx_hca_msg,
- .Lkey = kibnal_data.kib_whole_mem.md_lkey,
- .Length = IBNAL_MSG_SIZE,
- };
-
- rx->rx_wrq = (IB_WORK_REQ2) {
- .Next = NULL,
- .WorkReqId = kibnal_ptr2wreqid(rx, IBNAL_WID_RX),
- .MessageLen = IBNAL_MSG_SIZE,
- .DSList = &rx->rx_gl,
- .DSListDepth = 1,
- .Operation = WROpRecv,
- };
-
- LASSERT (conn->ibc_state >= IBNAL_CONN_CONNECTING);
- LASSERT (rx->rx_nob >= 0); /* not posted */
-
- CDEBUG(D_NET, "posting rx [%d %x "LPX64"]\n",
- rx->rx_wrq.DSList->Length,
- rx->rx_wrq.DSList->Lkey,
- rx->rx_wrq.DSList->Address);
-
- if (conn->ibc_state > IBNAL_CONN_ESTABLISHED) {
- /* No more posts for this rx; so lose its ref */
- kibnal_conn_decref(conn);
- return 0;
- }
-
- rx->rx_nob = -1; /* flag posted */
- mb();
-
- frc = iba_post_recv2(conn->ibc_qp, &rx->rx_wrq, NULL);
- if (frc == FSUCCESS) {
- if (credit || rsrvd_credit) {
- spin_lock(&conn->ibc_lock);
-
- if (credit)
- conn->ibc_outstanding_credits++;
- if (rsrvd_credit)
- conn->ibc_reserved_credits++;
-
- spin_unlock(&conn->ibc_lock);
-
- kibnal_check_sends(conn);
- }
- return 0;
- }
-
- CERROR ("post rx -> %s failed %d\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid), frc);
- rc = -EIO;
- kibnal_close_conn(rx->rx_conn, rc);
- /* No more posts for this rx; so lose its ref */
- kibnal_conn_decref(conn);
- return rc;
-}
-
-int
-kibnal_post_receives (kib_conn_t *conn)
-{
- int i;
- int rc;
-
- LASSERT (conn->ibc_state == IBNAL_CONN_CONNECTING);
-
- for (i = 0; i < IBNAL_RX_MSGS; i++) {
- /* +1 ref for rx desc. This ref remains until kibnal_post_rx
- * fails (i.e. actual failure or we're disconnecting) */
- kibnal_conn_addref(conn);
- rc = kibnal_post_rx (&conn->ibc_rxs[i], 0, 0);
- if (rc != 0)
- return rc;
- }
-
- return 0;
-}
-
-kib_tx_t *
-kibnal_find_waiting_tx_locked(kib_conn_t *conn, int txtype, __u64 cookie)
-{
- struct list_head *tmp;
-
- list_for_each(tmp, &conn->ibc_active_txs) {
- kib_tx_t *tx = list_entry(tmp, kib_tx_t, tx_list);
-
- LASSERT (!tx->tx_queued);
- LASSERT (tx->tx_sending != 0 || tx->tx_waiting);
-
- if (tx->tx_cookie != cookie)
- continue;
-
- if (tx->tx_waiting &&
- tx->tx_msg->ibm_type == txtype)
- return tx;
-
- CWARN("Bad completion: %swaiting, type %x (wanted %x)\n",
- tx->tx_waiting ? "" : "NOT ",
- tx->tx_msg->ibm_type, txtype);
- }
- return NULL;
-}
-
-void
-kibnal_handle_completion(kib_conn_t *conn, int txtype, int status, __u64 cookie)
-{
- kib_tx_t *tx;
- int idle;
-
- spin_lock(&conn->ibc_lock);
-
- tx = kibnal_find_waiting_tx_locked(conn, txtype, cookie);
- if (tx == NULL) {
- spin_unlock(&conn->ibc_lock);
-
- CWARN("Unmatched completion type %x cookie "LPX64" from %s\n",
- txtype, cookie, libcfs_nid2str(conn->ibc_peer->ibp_nid));
- kibnal_close_conn (conn, -EPROTO);
- return;
- }
-
- if (tx->tx_status == 0) { /* success so far */
- if (status < 0) { /* failed? */
- tx->tx_status = status;
- } else if (txtype == IBNAL_MSG_GET_REQ) {
- lnet_set_reply_msg_len(kibnal_data.kib_ni,
- tx->tx_lntmsg[1], status);
- }
- }
-
- tx->tx_waiting = 0;
-
- idle = !tx->tx_queued && (tx->tx_sending == 0);
- if (idle)
- list_del(&tx->tx_list);
-
- spin_unlock(&conn->ibc_lock);
-
- if (idle)
- kibnal_tx_done(tx);
-}
-
-void
-kibnal_send_completion (kib_conn_t *conn, int type, int status, __u64 cookie)
-{
- kib_tx_t *tx = kibnal_get_idle_tx();
-
- if (tx == NULL) {
- CERROR("Can't get tx for completion %x for %s\n",
- type, libcfs_nid2str(conn->ibc_peer->ibp_nid));
- return;
- }
-
- tx->tx_msg->ibm_u.completion.ibcm_status = status;
- tx->tx_msg->ibm_u.completion.ibcm_cookie = cookie;
- kibnal_init_tx_msg(tx, type, sizeof(kib_completion_msg_t));
-
- kibnal_queue_tx(tx, conn);
-}
-
-void
-kibnal_handle_rx (kib_rx_t *rx)
-{
- kib_msg_t *msg = rx->rx_msg;
- kib_conn_t *conn = rx->rx_conn;
- int credits = msg->ibm_credits;
- kib_tx_t *tx;
- int rc = 0;
- int repost = 1;
- int rsrvd_credit = 0;
- int rc2;
-
- LASSERT (conn->ibc_state >= IBNAL_CONN_ESTABLISHED);
-
- CDEBUG (D_NET, "Received %x[%d] from %s\n",
- msg->ibm_type, credits, libcfs_nid2str(conn->ibc_peer->ibp_nid));
-
- if (credits != 0) {
- /* Have I received credits that will let me send? */
- spin_lock(&conn->ibc_lock);
- conn->ibc_credits += credits;
- spin_unlock(&conn->ibc_lock);
-
- kibnal_check_sends(conn);
- }
-
- switch (msg->ibm_type) {
- default:
- CERROR("Bad IBNAL message type %x from %s\n",
- msg->ibm_type, libcfs_nid2str(conn->ibc_peer->ibp_nid));
- rc = -EPROTO;
- break;
-
- case IBNAL_MSG_NOOP:
- break;
-
- case IBNAL_MSG_IMMEDIATE:
- rc = lnet_parse(kibnal_data.kib_ni, &msg->ibm_u.immediate.ibim_hdr,
- msg->ibm_srcnid, rx, 0);
- repost = rc < 0; /* repost on error */
- break;
-
- case IBNAL_MSG_PUT_REQ:
- rc = lnet_parse(kibnal_data.kib_ni, &msg->ibm_u.putreq.ibprm_hdr,
- msg->ibm_srcnid, rx, 1);
- repost = rc < 0; /* repost on error */
- break;
-
- case IBNAL_MSG_PUT_NAK:
- rsrvd_credit = 1; /* rdma reply (was pre-reserved) */
-
- CWARN ("PUT_NACK from %s\n", libcfs_nid2str(conn->ibc_peer->ibp_nid));
- kibnal_handle_completion(conn, IBNAL_MSG_PUT_REQ,
- msg->ibm_u.completion.ibcm_status,
- msg->ibm_u.completion.ibcm_cookie);
- break;
-
- case IBNAL_MSG_PUT_ACK:
- rsrvd_credit = 1; /* rdma reply (was pre-reserved) */
-
- spin_lock(&conn->ibc_lock);
- tx = kibnal_find_waiting_tx_locked(conn, IBNAL_MSG_PUT_REQ,
- msg->ibm_u.putack.ibpam_src_cookie);
- if (tx != NULL)
- list_del(&tx->tx_list);
- spin_unlock(&conn->ibc_lock);
-
- if (tx == NULL) {
- CERROR("Unmatched PUT_ACK from %s\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid));
- rc = -EPROTO;
- break;
- }
-
- LASSERT (tx->tx_waiting);
- /* CAVEAT EMPTOR: I could be racing with tx_complete, but...
- * (a) I can overwrite tx_msg since my peer has received it!
- * (b) tx_waiting set tells tx_complete() it's not done. */
-
- tx->tx_nwrq = 0; /* overwrite PUT_REQ */
-
- rc2 = kibnal_init_rdma(tx, IBNAL_MSG_PUT_DONE,
- kibnal_rd_size(&msg->ibm_u.putack.ibpam_rd),
- &msg->ibm_u.putack.ibpam_rd,
- msg->ibm_u.putack.ibpam_dst_cookie);
- if (rc2 < 0)
- CERROR("Can't setup rdma for PUT to %s: %d\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid), rc2);
-
- spin_lock(&conn->ibc_lock);
- if (tx->tx_status == 0 && rc2 < 0)
- tx->tx_status = rc2;
- tx->tx_waiting = 0; /* clear waiting and queue atomically */
- kibnal_queue_tx_locked(tx, conn);
- spin_unlock(&conn->ibc_lock);
- break;
-
- case IBNAL_MSG_PUT_DONE:
- /* This buffer was pre-reserved by not returning the credit
- * when the PUT_REQ's buffer was reposted, so I just return it
- * now */
- kibnal_handle_completion(conn, IBNAL_MSG_PUT_ACK,
- msg->ibm_u.completion.ibcm_status,
- msg->ibm_u.completion.ibcm_cookie);
- break;
-
- case IBNAL_MSG_GET_REQ:
- rc = lnet_parse(kibnal_data.kib_ni, &msg->ibm_u.get.ibgm_hdr,
- msg->ibm_srcnid, rx, 1);
- repost = rc < 0; /* repost on error */
- break;
-
- case IBNAL_MSG_GET_DONE:
- rsrvd_credit = 1; /* rdma reply (was pre-reserved) */
-
- kibnal_handle_completion(conn, IBNAL_MSG_GET_REQ,
- msg->ibm_u.completion.ibcm_status,
- msg->ibm_u.completion.ibcm_cookie);
- break;
- }
-
- if (rc < 0) /* protocol error */
- kibnal_close_conn(conn, rc);
-
- if (repost) {
- if (conn->ibc_version == IBNAL_MSG_VERSION_RDMAREPLYNOTRSRVD)
- rsrvd_credit = 0; /* peer isn't pre-reserving */
-
- kibnal_post_rx(rx, !rsrvd_credit, rsrvd_credit);
- }
-}
-
-void
-kibnal_rx_complete (IB_WORK_COMPLETION *wc, __u64 rxseq)
-{
- kib_rx_t *rx = (kib_rx_t *)kibnal_wreqid2ptr(wc->WorkReqId);
- int nob = wc->Length;
- kib_msg_t *msg = rx->rx_msg;
- kib_conn_t *conn = rx->rx_conn;
- unsigned long flags;
- int rc;
- int err = -EIO;
-
- LASSERT (rx->rx_nob < 0); /* was posted */
- rx->rx_nob = 0; /* isn't now */
- mb();
-
- /* receives complete with error in any case after we've started
- * disconnecting */
- if (conn->ibc_state > IBNAL_CONN_ESTABLISHED)
- goto ignore;
-
- if (wc->Status != WRStatusSuccess) {
- CERROR("Rx from %s failed: %d\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid), wc->Status);
- goto failed;
- }
-
- rc = kibnal_unpack_msg(msg, conn->ibc_version, nob);
- if (rc != 0) {
- CERROR ("Error %d unpacking rx from %s\n",
- rc, libcfs_nid2str(conn->ibc_peer->ibp_nid));
- goto failed;
- }
-
- rx->rx_nob = nob; /* Now I know nob > 0 */
- mb();
-
- if (msg->ibm_srcnid != conn->ibc_peer->ibp_nid ||
- msg->ibm_dstnid != kibnal_data.kib_ni->ni_nid ||
- msg->ibm_srcstamp != conn->ibc_incarnation ||
- msg->ibm_dststamp != kibnal_data.kib_incarnation) {
- CERROR ("Stale rx from %s\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid));
- err = -ESTALE;
- goto failed;
- }
-
- if (msg->ibm_seq != rxseq) {
- CERROR ("Out-of-sequence rx from %s"
- ": got "LPD64" but expected "LPD64"\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid),
- msg->ibm_seq, rxseq);
- goto failed;
- }
-
- /* set time last known alive */
- kibnal_peer_alive(conn->ibc_peer);
-
- /* racing with connection establishment/teardown! */
-
- if (conn->ibc_state < IBNAL_CONN_ESTABLISHED) {
- write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
- /* must check holding global lock to eliminate race */
- if (conn->ibc_state < IBNAL_CONN_ESTABLISHED) {
- list_add_tail(&rx->rx_list, &conn->ibc_early_rxs);
- write_unlock_irqrestore(&kibnal_data.kib_global_lock,
- flags);
- return;
- }
- write_unlock_irqrestore(&kibnal_data.kib_global_lock,
- flags);
- }
- kibnal_handle_rx(rx);
- return;
-
- failed:
- kibnal_close_conn(conn, err);
- ignore:
- /* Don't re-post rx & drop its ref on conn */
- kibnal_conn_decref(conn);
-}
-
-struct page *
-kibnal_kvaddr_to_page (unsigned long vaddr)
-{
- struct page *page;
-
- if (vaddr >= VMALLOC_START &&
- vaddr < VMALLOC_END) {
- page = vmalloc_to_page ((void *)vaddr);
- LASSERT (page != NULL);
- return page;
- }
-#ifdef CONFIG_HIGHMEM
- if (vaddr >= PKMAP_BASE &&
- vaddr < (PKMAP_BASE + LAST_PKMAP * PAGE_SIZE)) {
- /* No highmem pages only used for bulk (kiov) I/O */
- CERROR("find page for address in highmem\n");
- LBUG();
- }
-#endif
- page = virt_to_page (vaddr);
- LASSERT (page != NULL);
- return page;
-}
-
-#if !IBNAL_USE_FMR
-int
-kibnal_append_rdfrag(kib_rdma_desc_t *rd, int active, struct page *page,
- unsigned long page_offset, unsigned long len)
-{
- kib_rdma_frag_t *frag = &rd->rd_frags[rd->rd_nfrag];
-
- if (rd->rd_nfrag >= IBNAL_MAX_RDMA_FRAGS) {
- CERROR ("Too many RDMA fragments\n");
- return -EMSGSIZE;
- }
-
- if (active) {
- if (rd->rd_nfrag == 0)
- rd->rd_key = kibnal_data.kib_whole_mem.md_lkey;
- } else {
- if (rd->rd_nfrag == 0)
- rd->rd_key = kibnal_data.kib_whole_mem.md_rkey;
- }
-
- frag->rf_nob = len;
- frag->rf_addr = kibnal_data.kib_whole_mem.md_addr +
- lnet_page2phys(page) + page_offset;
-
- CDEBUG(D_NET,"map key %x frag [%d]["LPX64" for %d]\n",
- rd->rd_key, rd->rd_nfrag, frag->rf_addr, frag->rf_nob);
-
- rd->rd_nfrag++;
- return 0;
-}
-
-int
-kibnal_setup_rd_iov(kib_tx_t *tx, kib_rdma_desc_t *rd, int active,
- unsigned int niov, struct iovec *iov, int offset, int nob)
-
-{
- int fragnob;
- int rc;
- unsigned long vaddr;
- struct page *page;
- int page_offset;
-
- LASSERT (nob > 0);
- LASSERT (niov > 0);
- LASSERT ((rd != tx->tx_rd) == !active);
-
- while (offset >= iov->iov_len) {
- offset -= iov->iov_len;
- niov--;
- iov++;
- LASSERT (niov > 0);
- }
-
- rd->rd_nfrag = 0;
- do {
- LASSERT (niov > 0);
-
- vaddr = ((unsigned long)iov->iov_base) + offset;
- page_offset = vaddr & (PAGE_SIZE - 1);
- page = kibnal_kvaddr_to_page(vaddr);
- if (page == NULL) {
- CERROR ("Can't find page\n");
- return -EFAULT;
- }
-
- fragnob = min((int)(iov->iov_len - offset), nob);
- fragnob = min(fragnob, (int)PAGE_SIZE - page_offset);
-
- rc = kibnal_append_rdfrag(rd, active, page,
- page_offset, fragnob);
- if (rc != 0)
- return rc;
-
- if (offset + fragnob < iov->iov_len) {
- offset += fragnob;
- } else {
- offset = 0;
- iov++;
- niov--;
- }
- nob -= fragnob;
- } while (nob > 0);
-
- return 0;
-}
-
-int
-kibnal_setup_rd_kiov (kib_tx_t *tx, kib_rdma_desc_t *rd, int active,
- int nkiov, lnet_kiov_t *kiov, int offset, int nob)
-{
- int fragnob;
- int rc;
-
- CDEBUG(D_NET, "niov %d offset %d nob %d\n", nkiov, offset, nob);
-
- LASSERT (nob > 0);
- LASSERT (nkiov > 0);
- LASSERT ((rd != tx->tx_rd) == !active);
-
- while (offset >= kiov->kiov_len) {
- offset -= kiov->kiov_len;
- nkiov--;
- kiov++;
- LASSERT (nkiov > 0);
- }
-
- rd->rd_nfrag = 0;
- do {
- LASSERT (nkiov > 0);
- fragnob = min((int)(kiov->kiov_len - offset), nob);
-
- rc = kibnal_append_rdfrag(rd, active, kiov->kiov_page,
- kiov->kiov_offset + offset,
- fragnob);
- if (rc != 0)
- return rc;
-
- offset = 0;
- kiov++;
- nkiov--;
- nob -= fragnob;
- } while (nob > 0);
-
- return 0;
-}
-#else
-int
-kibnal_map_tx (kib_tx_t *tx, kib_rdma_desc_t *rd, int active,
- int npages, unsigned long page_offset, int nob)
-{
- IB_ACCESS_CONTROL access = {0,};
- FSTATUS frc;
-
- LASSERT ((rd != tx->tx_rd) == !active);
- LASSERT (!tx->tx_md.md_active);
- LASSERT (tx->tx_md.md_fmrcount > 0);
- LASSERT (page_offset < PAGE_SIZE);
- LASSERT (npages >= (1 + ((page_offset + nob - 1)>>PAGE_SHIFT)));
- LASSERT (npages <= LNET_MAX_IOV);
-
- if (!active) {
- // access.s.MWBindable = 1;
- access.s.LocalWrite = 1;
- access.s.RdmaWrite = 1;
- }
-
- /* Map the memory described by tx->tx_pages
- frc = iibt_register_physical_memory(kibnal_data.kib_hca,
- IBNAL_RDMA_BASE,
- tx->tx_pages, npages,
- page_offset,
- kibnal_data.kib_pd,
- access,
- &tx->tx_md.md_handle,
- &tx->tx_md.md_addr,
- &tx->tx_md.md_lkey,
- &tx->tx_md.md_rkey);
- */
- return -EINVAL;
-}
-
-int
-kibnal_setup_rd_iov (kib_tx_t *tx, kib_rdma_desc_t *rd, int active,
- unsigned int niov, struct iovec *iov, int offset, int nob)
-
-{
- int resid;
- int fragnob;
- struct page *page;
- int npages;
- unsigned long page_offset;
- unsigned long vaddr;
-
- LASSERT (nob > 0);
- LASSERT (niov > 0);
-
- while (offset >= iov->iov_len) {
- offset -= iov->iov_len;
- niov--;
- iov++;
- LASSERT (niov > 0);
- }
-
- if (nob > iov->iov_len - offset) {
- CERROR ("Can't map multiple vaddr fragments\n");
- return (-EMSGSIZE);
- }
-
- vaddr = ((unsigned long)iov->iov_base) + offset;
-
- page_offset = vaddr & (PAGE_SIZE - 1);
- resid = nob;
- npages = 0;
-
- do {
- LASSERT (npages < LNET_MAX_IOV);
-
- page = kibnal_kvaddr_to_page(vaddr);
- if (page == NULL) {
- CERROR("Can't find page for %lu\n", vaddr);
- return -EFAULT;
- }
-
- tx->tx_pages[npages++] = lnet_page2phys(page);
-
- fragnob = PAGE_SIZE - (vaddr & (PAGE_SIZE - 1));
- vaddr += fragnob;
- resid -= fragnob;
-
- } while (resid > 0);
-
- return kibnal_map_tx(tx, rd, active, npages, page_offset, nob);
-}
-
-int
-kibnal_setup_rd_kiov (kib_tx_t *tx, kib_rdma_desc_t *rd, int active,
- int nkiov, lnet_kiov_t *kiov, int offset, int nob)
-{
- int resid;
- int npages;
- unsigned long page_offset;
-
- CDEBUG(D_NET, "niov %d offset %d nob %d\n", nkiov, offset, nob);
-
- LASSERT (nob > 0);
- LASSERT (nkiov > 0);
- LASSERT (nkiov <= LNET_MAX_IOV);
- LASSERT (!tx->tx_md.md_active);
- LASSERT ((rd != tx->tx_rd) == !active);
-
- while (offset >= kiov->kiov_len) {
- offset -= kiov->kiov_len;
- nkiov--;
- kiov++;
- LASSERT (nkiov > 0);
- }
-
- page_offset = kiov->kiov_offset + offset;
-
- resid = offset + nob;
- npages = 0;
-
- do {
- LASSERT (npages < LNET_MAX_IOV);
- LASSERT (nkiov > 0);
-
- if ((npages > 0 && kiov->kiov_offset != 0) ||
- (resid > kiov->kiov_len &&
- (kiov->kiov_offset + kiov->kiov_len) != PAGE_SIZE)) {
- /* Can't have gaps */
- CERROR ("Can't make payload contiguous in I/O VM:"
- "page %d, offset %d, len %d \n",
- npages, kiov->kiov_offset, kiov->kiov_len);
-
- return -EINVAL;
- }
-
- tx->tx_pages[npages++] = lnet_page2phys(kiov->kiov_page);
- resid -= kiov->kiov_len;
- kiov++;
- nkiov--;
- } while (resid > 0);
-
- return kibnal_map_tx(tx, rd, active, npages, page_offset, nob);
-}
-#endif
-
-kib_conn_t *
-kibnal_find_conn_locked (kib_peer_t *peer)
-{
- struct list_head *tmp;
-
- /* just return the first connection */
- list_for_each (tmp, &peer->ibp_conns) {
- return (list_entry(tmp, kib_conn_t, ibc_list));
- }
-
- return (NULL);
-}
-
-void
-kibnal_check_sends (kib_conn_t *conn)
-{
- kib_tx_t *tx;
- FSTATUS frc;
- int rc;
- int consume_cred;
- int done;
-
- LASSERT (conn->ibc_state >= IBNAL_CONN_ESTABLISHED);
-
- spin_lock(&conn->ibc_lock);
-
- LASSERT (conn->ibc_nsends_posted <=
- *kibnal_tunables.kib_concurrent_sends);
- LASSERT (conn->ibc_reserved_credits >= 0);
-
- while (conn->ibc_reserved_credits > 0 &&
- !list_empty(&conn->ibc_tx_queue_rsrvd)) {
- LASSERT (conn->ibc_version !=
- IBNAL_MSG_VERSION_RDMAREPLYNOTRSRVD);
- tx = list_entry(conn->ibc_tx_queue_rsrvd.next,
- kib_tx_t, tx_list);
- list_del(&tx->tx_list);
- list_add_tail(&tx->tx_list, &conn->ibc_tx_queue);
- conn->ibc_reserved_credits--;
- }
-
- if (list_empty(&conn->ibc_tx_queue) &&
- list_empty(&conn->ibc_tx_queue_nocred) &&
- (conn->ibc_outstanding_credits >= IBNAL_CREDIT_HIGHWATER ||
- kibnal_send_keepalive(conn))) {
- spin_unlock(&conn->ibc_lock);
-
- tx = kibnal_get_idle_tx();
- if (tx != NULL)
- kibnal_init_tx_msg(tx, IBNAL_MSG_NOOP, 0);
-
- spin_lock(&conn->ibc_lock);
-
- if (tx != NULL)
- kibnal_queue_tx_locked(tx, conn);
- }
-
- for (;;) {
- if (!list_empty(&conn->ibc_tx_queue_nocred)) {
- LASSERT (conn->ibc_version !=
- IBNAL_MSG_VERSION_RDMAREPLYNOTRSRVD);
- tx = list_entry (conn->ibc_tx_queue_nocred.next,
- kib_tx_t, tx_list);
- consume_cred = 0;
- } else if (!list_empty (&conn->ibc_tx_queue)) {
- tx = list_entry (conn->ibc_tx_queue.next,
- kib_tx_t, tx_list);
- consume_cred = 1;
- } else {
- /* nothing waiting */
- break;
- }
-
- LASSERT (tx->tx_queued);
- /* We rely on this for QP sizing */
- LASSERT (tx->tx_nwrq > 0 && tx->tx_nwrq <= 1 + IBNAL_MAX_RDMA_FRAGS);
-
- LASSERT (conn->ibc_outstanding_credits >= 0);
- LASSERT (conn->ibc_outstanding_credits <= IBNAL_MSG_QUEUE_SIZE);
- LASSERT (conn->ibc_credits >= 0);
- LASSERT (conn->ibc_credits <= IBNAL_MSG_QUEUE_SIZE);
-
- if (conn->ibc_nsends_posted ==
- *kibnal_tunables.kib_concurrent_sends) {
- /* We've got some tx completions outstanding... */
- CDEBUG(D_NET, "%s: posted enough\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid));
- break;
- }
-
- if (consume_cred) {
- if (conn->ibc_credits == 0) { /* no credits */
- CDEBUG(D_NET, "%s: no credits\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid));
- break;
- }
-
- if (conn->ibc_credits == 1 && /* last credit reserved for */
- conn->ibc_outstanding_credits == 0) { /* giving back credits */
- CDEBUG(D_NET, "%s: not using last credit\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid));
- break;
- }
- }
-
- list_del (&tx->tx_list);
- tx->tx_queued = 0;
-
- /* NB don't drop ibc_lock before bumping tx_sending */
-
- if (tx->tx_msg->ibm_type == IBNAL_MSG_NOOP &&
- (!list_empty(&conn->ibc_tx_queue) ||
- !list_empty(&conn->ibc_tx_queue_nocred) ||
- (conn->ibc_outstanding_credits < IBNAL_CREDIT_HIGHWATER &&
- !kibnal_send_keepalive(conn)))) {
- /* redundant NOOP */
- spin_unlock(&conn->ibc_lock);
- kibnal_tx_done(tx);
- spin_lock(&conn->ibc_lock);
- CDEBUG(D_NET, "%s: redundant noop\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid));
- continue;
- }
-
- kibnal_pack_msg(tx->tx_msg, conn->ibc_version,
- conn->ibc_outstanding_credits,
- conn->ibc_peer->ibp_nid, conn->ibc_incarnation,
- conn->ibc_txseq);
-
- conn->ibc_txseq++;
- conn->ibc_outstanding_credits = 0;
- conn->ibc_nsends_posted++;
- if (consume_cred)
- conn->ibc_credits--;
-
- /* CAVEAT EMPTOR! This tx could be the PUT_DONE of an RDMA
- * PUT. If so, it was first queued here as a PUT_REQ, sent and
- * stashed on ibc_active_txs, matched by an incoming PUT_ACK,
- * and then re-queued here. It's (just) possible that
- * tx_sending is non-zero if we've not done the tx_complete() from
- * the first send; hence the ++ rather than = below. */
- tx->tx_sending++;
-
- list_add (&tx->tx_list, &conn->ibc_active_txs);
-
- LASSERT (tx->tx_nwrq > 0);
-
- rc = 0;
- frc = FSUCCESS;
- if (conn->ibc_state != IBNAL_CONN_ESTABLISHED) {
- rc = -ECONNABORTED;
- } else {
- frc = iba_post_send2(conn->ibc_qp, tx->tx_wrq, NULL);
- if (frc != FSUCCESS)
- rc = -EIO;
- }
-
- conn->ibc_last_send = jiffies;
-
- if (rc != 0) {
- /* NB credits are transferred in the actual
- * message, which can only be the last work item */
- conn->ibc_outstanding_credits += tx->tx_msg->ibm_credits;
- if (consume_cred)
- conn->ibc_credits++;
- conn->ibc_nsends_posted--;
-
- tx->tx_status = rc;
- tx->tx_waiting = 0;
- tx->tx_sending--;
-
- done = (tx->tx_sending == 0);
- if (done)
- list_del (&tx->tx_list);
-
- spin_unlock(&conn->ibc_lock);
-
- if (conn->ibc_state == IBNAL_CONN_ESTABLISHED)
- CERROR ("Error %d posting transmit to %s\n",
- frc, libcfs_nid2str(conn->ibc_peer->ibp_nid));
- else
- CDEBUG (D_NET, "Error %d posting transmit to %s\n",
- rc, libcfs_nid2str(conn->ibc_peer->ibp_nid));
-
- kibnal_close_conn (conn, rc);
-
- if (done)
- kibnal_tx_done (tx);
- return;
- }
- }
-
- spin_unlock(&conn->ibc_lock);
-}
-
-void
-kibnal_tx_complete (IB_WORK_COMPLETION *wc)
-{
- kib_tx_t *tx = (kib_tx_t *)kibnal_wreqid2ptr(wc->WorkReqId);
- kib_conn_t *conn = tx->tx_conn;
- int failed = wc->Status != WRStatusSuccess;
- int idle;
-
- CDEBUG(D_NET, "%s: sending %d nwrq %d status %d\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid),
- tx->tx_sending, tx->tx_nwrq, wc->Status);
-
- LASSERT (tx->tx_sending > 0);
-
- if (failed &&
- tx->tx_status == 0 &&
- conn->ibc_state == IBNAL_CONN_ESTABLISHED) {
-#if KIBLND_DETAILED_DEBUG
- int i;
- IB_WORK_REQ2 *wrq = &tx->tx_wrq[0];
- IB_LOCAL_DATASEGMENT *gl = &tx->tx_gl[0];
- lnet_msg_t *lntmsg = tx->tx_lntmsg[0];
-#endif
- CDEBUG(D_NETERROR, "tx -> %s type %x cookie "LPX64
- " sending %d waiting %d failed %d nwrk %d\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid),
- tx->tx_msg->ibm_type, tx->tx_cookie,
- tx->tx_sending, tx->tx_waiting, wc->Status,
- tx->tx_nwrq);
-#if KIBLND_DETAILED_DEBUG
- for (i = 0; i < tx->tx_nwrq; i++, wrq++, gl++) {
- switch (wrq->Operation) {
- default:
- CDEBUG(D_NETERROR, " [%3d] Addr %p Next %p OP %d "
- "DSList %p(%p)/%d: "LPX64"/%d K %x\n",
- i, wrq, wrq->Next, wrq->Operation,
- wrq->DSList, gl, wrq->DSListDepth,
- gl->Address, gl->Length, gl->Lkey);
- break;
- case WROpSend:
- CDEBUG(D_NETERROR, " [%3d] Addr %p Next %p SEND "
- "DSList %p(%p)/%d: "LPX64"/%d K %x\n",
- i, wrq, wrq->Next,
- wrq->DSList, gl, wrq->DSListDepth,
- gl->Address, gl->Length, gl->Lkey);
- break;
- case WROpRdmaWrite:
- CDEBUG(D_NETERROR, " [%3d] Addr %p Next %p DMA "
- "DSList: %p(%p)/%d "LPX64"/%d K %x -> "
- LPX64" K %x\n",
- i, wrq, wrq->Next,
- wrq->DSList, gl, wrq->DSListDepth,
- gl->Address, gl->Length, gl->Lkey,
- wrq->Req.SendRC.RemoteDS.Address,
- wrq->Req.SendRC.RemoteDS.Rkey);
- break;
- }
- }
-
- switch (tx->tx_msg->ibm_type) {
- default:
- CDEBUG(D_NETERROR, " msg type %x %p/%d, No RDMA\n",
- tx->tx_msg->ibm_type,
- tx->tx_msg, tx->tx_msg->ibm_nob);
- break;
-
- case IBNAL_MSG_PUT_DONE:
- case IBNAL_MSG_GET_DONE:
- CDEBUG(D_NETERROR, " msg type %x %p/%d, RDMA key %x frags %d...\n",
- tx->tx_msg->ibm_type,
- tx->tx_msg, tx->tx_msg->ibm_nob,
- tx->tx_rd->rd_key, tx->tx_rd->rd_nfrag);
- for (i = 0; i < tx->tx_rd->rd_nfrag; i++)
- CDEBUG(D_NETERROR, " [%d] "LPX64"/%d\n", i,
- tx->tx_rd->rd_frags[i].rf_addr,
- tx->tx_rd->rd_frags[i].rf_nob);
- if (lntmsg == NULL) {
- CDEBUG(D_NETERROR, " No lntmsg\n");
- } else if (lntmsg->msg_iov != NULL) {
- CDEBUG(D_NETERROR, " lntmsg in %d VIRT frags...\n",
- lntmsg->msg_niov);
- for (i = 0; i < lntmsg->msg_niov; i++)
- CDEBUG(D_NETERROR, " [%d] %p/%d\n", i,
- lntmsg->msg_iov[i].iov_base,
- lntmsg->msg_iov[i].iov_len);
- } else if (lntmsg->msg_kiov != NULL) {
- CDEBUG(D_NETERROR, " lntmsg in %d PAGE frags...\n",
- lntmsg->msg_niov);
- for (i = 0; i < lntmsg->msg_niov; i++)
- CDEBUG(D_NETERROR, " [%d] %p+%d/%d\n", i,
- lntmsg->msg_kiov[i].kiov_page,
- lntmsg->msg_kiov[i].kiov_offset,
- lntmsg->msg_kiov[i].kiov_len);
- } else {
- CDEBUG(D_NETERROR, " lntmsg in %d frags\n",
- lntmsg->msg_niov);
- }
-
- break;
- }
-#endif
- }
-
- spin_lock(&conn->ibc_lock);
-
- /* I could be racing with rdma completion. Whoever makes 'tx' idle
- * gets to free it, which also drops its ref on 'conn'. */
-
- tx->tx_sending--;
- conn->ibc_nsends_posted--;
-
- if (failed) {
- tx->tx_waiting = 0;
- tx->tx_status = -EIO;
- }
-
- idle = (tx->tx_sending == 0) && /* This is the final callback */
- !tx->tx_waiting && /* Not waiting for peer */
- !tx->tx_queued; /* Not re-queued (PUT_DONE) */
- if (idle)
- list_del(&tx->tx_list);
-
- kibnal_conn_addref(conn); /* 1 ref for me.... */
-
- spin_unlock(&conn->ibc_lock);
-
- if (idle)
- kibnal_tx_done (tx);
-
- if (failed) {
- kibnal_close_conn (conn, -EIO);
- } else {
- kibnal_peer_alive(conn->ibc_peer);
- kibnal_check_sends(conn);
- }
-
- kibnal_conn_decref(conn); /* ...until here */
-}
-
-void
-kibnal_init_tx_msg (kib_tx_t *tx, int type, int body_nob)
-{
- IB_LOCAL_DATASEGMENT *gl = &tx->tx_gl[tx->tx_nwrq];
- IB_WORK_REQ2 *wrq = &tx->tx_wrq[tx->tx_nwrq];
- int nob = offsetof (kib_msg_t, ibm_u) + body_nob;
-
- LASSERT (tx->tx_nwrq >= 0 &&
- tx->tx_nwrq < (1 + IBNAL_MAX_RDMA_FRAGS));
- LASSERT (nob <= IBNAL_MSG_SIZE);
-
- kibnal_init_msg(tx->tx_msg, type, body_nob);
-
- *gl = (IB_LOCAL_DATASEGMENT) {
- .Address = tx->tx_hca_msg,
- .Length = IBNAL_MSG_SIZE,
- .Lkey = kibnal_data.kib_whole_mem.md_lkey,
- };
-
- wrq->Next = NULL; /* This is the last one */
-
- wrq->WorkReqId = kibnal_ptr2wreqid(tx, IBNAL_WID_TX);
- wrq->Operation = WROpSend;
- wrq->DSList = gl;
- wrq->DSListDepth = 1;
- wrq->MessageLen = nob;
- wrq->Req.SendRC.ImmediateData = 0;
- wrq->Req.SendRC.Options.s.SolicitedEvent = 1;
- wrq->Req.SendRC.Options.s.SignaledCompletion = 1;
- wrq->Req.SendRC.Options.s.ImmediateData = 0;
- wrq->Req.SendRC.Options.s.Fence = 0;
- /* fence only needed on RDMA reads */
-
- tx->tx_nwrq++;
-}
-
-int
-kibnal_init_rdma (kib_tx_t *tx, int type, int nob,
- kib_rdma_desc_t *dstrd, __u64 dstcookie)
-{
- kib_msg_t *ibmsg = tx->tx_msg;
- kib_rdma_desc_t *srcrd = tx->tx_rd;
- IB_LOCAL_DATASEGMENT *gl;
- IB_WORK_REQ2 *wrq;
- int rc;
-
-#if IBNAL_USE_FMR
- LASSERT (tx->tx_nwrq == 0);
-
- gl = &tx->tx_gl[0];
- gl->Length = nob;
- gl->Address = srcrd->rd_addr;
- gl->Lkey = srcrd->rd_key;
-
- wrq = &tx->tx_wrq[0];
-
- wrq->Next = wrq + 1;
- wrq->WorkReqId = kibnal_ptr2wreqid(tx, IBNAL_WID_RDMA);
- wrq->Operation = WROpRdmaWrite;
- wrq->DSList = gl;
- wrq->DSListDepth = 1;
- wrq->MessageLen = nob;
-
- wrq->Req.SendRC.ImmediateData = 0;
- wrq->Req.SendRC.Options.s.SolicitedEvent = 0;
- wrq->Req.SendRC.Options.s.SignaledCompletion = 0;
- wrq->Req.SendRC.Options.s.ImmediateData = 0;
- wrq->Req.SendRC.Options.s.Fence = 0;
-
- wrq->Req.SendRC.RemoteDS.Address = dstrd->rd_addr;
- wrq->Req.SendRC.RemoteDS.Rkey = dstrd->rd_key;
-
- tx->tx_nwrq = 1;
- rc = nob;
-#else
- /* CAVEAT EMPTOR: this 'consumes' the frags in 'dstrd' */
- int resid = nob;
- kib_rdma_frag_t *srcfrag;
- int srcidx;
- kib_rdma_frag_t *dstfrag;
- int dstidx;
- int wrknob;
-
- /* Called by scheduler */
- LASSERT (!in_interrupt());
-
- LASSERT (type == IBNAL_MSG_GET_DONE ||
- type == IBNAL_MSG_PUT_DONE);
-
- srcidx = dstidx = 0;
- srcfrag = &srcrd->rd_frags[0];
- dstfrag = &dstrd->rd_frags[0];
- rc = resid;
-
- while (resid > 0) {
- if (srcidx >= srcrd->rd_nfrag) {
- CERROR("Src buffer exhausted: %d frags\n", srcidx);
- rc = -EPROTO;
- break;
- }
-
- if (dstidx == dstrd->rd_nfrag) {
- CERROR("Dst buffer exhausted: %d frags\n", dstidx);
- rc = -EPROTO;
- break;
- }
-
- if (tx->tx_nwrq == IBNAL_MAX_RDMA_FRAGS) {
- CERROR("RDMA too fragmented: %d/%d src %d/%d dst frags\n",
- srcidx, srcrd->rd_nfrag,
- dstidx, dstrd->rd_nfrag);
- rc = -EMSGSIZE;
- break;
- }
-
- wrknob = MIN(MIN(srcfrag->rf_nob, dstfrag->rf_nob), resid);
-
- gl = &tx->tx_gl[tx->tx_nwrq];
- gl->Length = wrknob;
- gl->Address = srcfrag->rf_addr;
- gl->Lkey = srcrd->rd_key;
-
- wrq = &tx->tx_wrq[tx->tx_nwrq];
-
- wrq->Next = wrq + 1;
- wrq->WorkReqId = kibnal_ptr2wreqid(tx, IBNAL_WID_RDMA);
- wrq->Operation = WROpRdmaWrite;
- wrq->DSList = gl;
- wrq->DSListDepth = 1;
- wrq->MessageLen = nob;
-
- wrq->Req.SendRC.ImmediateData = 0;
- wrq->Req.SendRC.Options.s.SolicitedEvent = 0;
- wrq->Req.SendRC.Options.s.SignaledCompletion = 0;
- wrq->Req.SendRC.Options.s.ImmediateData = 0;
- wrq->Req.SendRC.Options.s.Fence = 0;
-
- wrq->Req.SendRC.RemoteDS.Address = dstfrag->rf_addr;
- wrq->Req.SendRC.RemoteDS.Rkey = dstrd->rd_key;
-
- resid -= wrknob;
- if (wrknob < srcfrag->rf_nob) {
- srcfrag->rf_addr += wrknob;
- srcfrag->rf_nob -= wrknob;
- } else {
- srcfrag++;
- srcidx++;
- }
-
- if (wrknob < dstfrag->rf_nob) {
- dstfrag->rf_addr += wrknob;
- dstfrag->rf_nob -= wrknob;
- } else {
- dstfrag++;
- dstidx++;
- }
-
- tx->tx_nwrq++;
- }
-
- if (rc < 0) /* no RDMA if completing with failure */
- tx->tx_nwrq = 0;
-#endif
-
- ibmsg->ibm_u.completion.ibcm_status = rc;
- ibmsg->ibm_u.completion.ibcm_cookie = dstcookie;
- kibnal_init_tx_msg(tx, type, sizeof (kib_completion_msg_t));
-
- return rc;
-}
-
-void
-kibnal_queue_tx (kib_tx_t *tx, kib_conn_t *conn)
-{
- spin_lock(&conn->ibc_lock);
- kibnal_queue_tx_locked (tx, conn);
- spin_unlock(&conn->ibc_lock);
-
- kibnal_check_sends(conn);
-}
-
-void
-kibnal_schedule_active_connect_locked (kib_peer_t *peer, int proto_version)
-{
- /* Called holding kib_global_lock exclusive with IRQs disabled */
-
- peer->ibp_version = proto_version; /* proto version for new conn */
- peer->ibp_connecting++; /* I'm connecting */
- kibnal_peer_addref(peer); /* extra ref for connd */
-
- spin_lock(&kibnal_data.kib_connd_lock);
-
- list_add_tail (&peer->ibp_connd_list, &kibnal_data.kib_connd_peers);
- wake_up (&kibnal_data.kib_connd_waitq);
-
- spin_unlock(&kibnal_data.kib_connd_lock);
-}
-
-void
-kibnal_schedule_active_connect (kib_peer_t *peer, int proto_version)
-{
- unsigned long flags;
-
- write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
-
- kibnal_schedule_active_connect_locked(peer, proto_version);
-
- write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
-}
-
-void
-kibnal_launch_tx (kib_tx_t *tx, lnet_nid_t nid)
-{
- kib_peer_t *peer;
- kib_conn_t *conn;
- unsigned long flags;
- rwlock_t *g_lock = &kibnal_data.kib_global_lock;
- int retry;
- int rc;
-
- /* If I get here, I've committed to send, so I complete the tx with
- * failure on any problems */
-
- LASSERT (tx->tx_conn == NULL); /* only set when assigned a conn */
- LASSERT (tx->tx_nwrq > 0); /* work items have been set up */
-
- for (retry = 0; ; retry = 1) {
- read_lock_irqsave(g_lock, flags);
-
- peer = kibnal_find_peer_locked (nid);
- if (peer != NULL) {
- conn = kibnal_find_conn_locked (peer);
- if (conn != NULL) {
- kibnal_conn_addref(conn); /* 1 ref for me... */
- read_unlock_irqrestore(g_lock, flags);
-
- kibnal_queue_tx (tx, conn);
- kibnal_conn_decref(conn); /* ...to here */
- return;
- }
- }
-
- /* Making one or more connections; I'll need a write lock... */
- read_unlock(g_lock);
- write_lock(g_lock);
-
- peer = kibnal_find_peer_locked (nid);
- if (peer != NULL)
- break;
-
- write_unlock_irqrestore(g_lock, flags);
-
- if (retry) {
- CERROR("Can't find peer %s\n", libcfs_nid2str(nid));
-
- tx->tx_status = -EHOSTUNREACH;
- tx->tx_waiting = 0;
- kibnal_tx_done (tx);
- return;
- }
-
- rc = kibnal_add_persistent_peer(nid);
- if (rc != 0) {
- CERROR("Can't add peer %s: %d\n",
- libcfs_nid2str(nid), rc);
-
- tx->tx_status = -EHOSTUNREACH;
- tx->tx_waiting = 0;
- kibnal_tx_done (tx);
- return;
- }
- }
-
- conn = kibnal_find_conn_locked (peer);
- if (conn != NULL) {
- /* Connection exists; queue message on it */
- kibnal_conn_addref(conn); /* 1 ref for me... */
- write_unlock_irqrestore(g_lock, flags);
-
- kibnal_queue_tx (tx, conn);
- kibnal_conn_decref(conn); /* ...until here */
- return;
- }
-
- if (!kibnal_peer_connecting(peer)) {
- if (!(peer->ibp_reconnect_interval == 0 || /* first attempt */
- time_after_eq(jiffies, peer->ibp_reconnect_time))) {
- write_unlock_irqrestore(g_lock, flags);
- tx->tx_status = -EHOSTUNREACH;
- tx->tx_waiting = 0;
- kibnal_tx_done (tx);
- return;
- }
-
- kibnal_schedule_active_connect_locked(peer, IBNAL_MSG_VERSION);
- }
-
- /* A connection is being established; queue the message... */
- list_add_tail (&tx->tx_list, &peer->ibp_tx_queue);
-
- write_unlock_irqrestore(g_lock, flags);
-}
-
-void
-kibnal_txlist_done (struct list_head *txlist, int status)
-{
- kib_tx_t *tx;
-
- while (!list_empty (txlist)) {
- tx = list_entry (txlist->next, kib_tx_t, tx_list);
-
- list_del (&tx->tx_list);
- /* complete now */
- tx->tx_waiting = 0;
- tx->tx_status = status;
- kibnal_tx_done (tx);
- }
-}
-
-int
-kibnal_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg)
-{
- lnet_hdr_t *hdr = &lntmsg->msg_hdr;
- int type = lntmsg->msg_type;
- lnet_process_id_t target = lntmsg->msg_target;
- int target_is_router = lntmsg->msg_target_is_router;
- int routing = lntmsg->msg_routing;
- unsigned int payload_niov = lntmsg->msg_niov;
- struct iovec *payload_iov = lntmsg->msg_iov;
- lnet_kiov_t *payload_kiov = lntmsg->msg_kiov;
- unsigned int payload_offset = lntmsg->msg_offset;
- unsigned int payload_nob = lntmsg->msg_len;
- kib_msg_t *ibmsg;
- kib_tx_t *tx;
- int nob;
- int rc;
-
- /* NB 'private' is different depending on what we're sending.... */
-
- CDEBUG(D_NET, "sending %d bytes in %d frags to %s\n",
- payload_nob, payload_niov, libcfs_id2str(target));
-
- LASSERT (payload_nob == 0 || payload_niov > 0);
- LASSERT (payload_niov <= LNET_MAX_IOV);
-
- /* Thread context */
- LASSERT (!in_interrupt());
- /* payload is either all vaddrs or all pages */
- LASSERT (!(payload_kiov != NULL && payload_iov != NULL));
-
- switch (type) {
- default:
- LBUG();
- return (-EIO);
-
- case LNET_MSG_ACK:
- LASSERT (payload_nob == 0);
- break;
-
- case LNET_MSG_GET:
- if (routing || target_is_router)
- break; /* send IMMEDIATE */
-
- /* is the REPLY message too small for RDMA? */
- nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[lntmsg->msg_md->md_length]);
- if (nob <= IBNAL_MSG_SIZE)
- break; /* send IMMEDIATE */
-
- tx = kibnal_get_idle_tx();
- if (tx == NULL) {
- CERROR("Can allocate txd for GET to %s: \n",
- libcfs_nid2str(target.nid));
- return -ENOMEM;
- }
-
- ibmsg = tx->tx_msg;
- ibmsg->ibm_u.get.ibgm_hdr = *hdr;
- ibmsg->ibm_u.get.ibgm_cookie = tx->tx_cookie;
-
- if ((lntmsg->msg_md->md_options & LNET_MD_KIOV) == 0)
- rc = kibnal_setup_rd_iov(tx, &ibmsg->ibm_u.get.ibgm_rd,
- 0,
- lntmsg->msg_md->md_niov,
- lntmsg->msg_md->md_iov.iov,
- 0, lntmsg->msg_md->md_length);
- else
- rc = kibnal_setup_rd_kiov(tx, &ibmsg->ibm_u.get.ibgm_rd,
- 0,
- lntmsg->msg_md->md_niov,
- lntmsg->msg_md->md_iov.kiov,
- 0, lntmsg->msg_md->md_length);
- if (rc != 0) {
- CERROR("Can't setup GET sink for %s: %d\n",
- libcfs_nid2str(target.nid), rc);
- kibnal_tx_done(tx);
- return -EIO;
- }
-
-#if IBNAL_USE_FMR
- nob = sizeof(kib_get_msg_t);
-#else
- {
- int n = ibmsg->ibm_u.get.ibgm_rd.rd_nfrag;
-
- nob = offsetof(kib_get_msg_t, ibgm_rd.rd_frags[n]);
- }
-#endif
- kibnal_init_tx_msg(tx, IBNAL_MSG_GET_REQ, nob);
-
- tx->tx_lntmsg[1] = lnet_create_reply_msg(kibnal_data.kib_ni,
- lntmsg);
- if (tx->tx_lntmsg[1] == NULL) {
- CERROR("Can't create reply for GET -> %s\n",
- libcfs_nid2str(target.nid));
- kibnal_tx_done(tx);
- return -EIO;
- }
-
- tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg[0,1] on completion */
- tx->tx_waiting = 1; /* waiting for GET_DONE */
- kibnal_launch_tx(tx, target.nid);
- return 0;
-
- case LNET_MSG_REPLY:
- case LNET_MSG_PUT:
- /* Is the payload small enough not to need RDMA? */
- nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob]);
- if (nob <= IBNAL_MSG_SIZE)
- break; /* send IMMEDIATE */
-
- tx = kibnal_get_idle_tx();
- if (tx == NULL) {
- CERROR("Can't allocate %s txd for %s\n",
- type == LNET_MSG_PUT ? "PUT" : "REPLY",
- libcfs_nid2str(target.nid));
- return -ENOMEM;
- }
-
- if (payload_kiov == NULL)
- rc = kibnal_setup_rd_iov(tx, tx->tx_rd, 1,
- payload_niov, payload_iov,
- payload_offset, payload_nob);
- else
- rc = kibnal_setup_rd_kiov(tx, tx->tx_rd, 1,
- payload_niov, payload_kiov,
- payload_offset, payload_nob);
- if (rc != 0) {
- CERROR("Can't setup PUT src for %s: %d\n",
- libcfs_nid2str(target.nid), rc);
- kibnal_tx_done(tx);
- return -EIO;
- }
-
- ibmsg = tx->tx_msg;
- ibmsg->ibm_u.putreq.ibprm_hdr = *hdr;
- ibmsg->ibm_u.putreq.ibprm_cookie = tx->tx_cookie;
- kibnal_init_tx_msg(tx, IBNAL_MSG_PUT_REQ, sizeof(kib_putreq_msg_t));
-
- tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
- tx->tx_waiting = 1; /* waiting for PUT_{ACK,NAK} */
- kibnal_launch_tx(tx, target.nid);
- return 0;
- }
-
- /* send IMMEDIATE */
-
- LASSERT (offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob])
- <= IBNAL_MSG_SIZE);
-
- tx = kibnal_get_idle_tx();
- if (tx == NULL) {
- CERROR ("Can't send %d to %s: tx descs exhausted\n",
- type, libcfs_nid2str(target.nid));
- return -ENOMEM;
- }
-
- ibmsg = tx->tx_msg;
- ibmsg->ibm_u.immediate.ibim_hdr = *hdr;
-
- if (payload_kiov != NULL)
- lnet_copy_kiov2flat(IBNAL_MSG_SIZE, ibmsg,
- offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
- payload_niov, payload_kiov,
- payload_offset, payload_nob);
- else
- lnet_copy_iov2flat(IBNAL_MSG_SIZE, ibmsg,
- offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
- payload_niov, payload_iov,
- payload_offset, payload_nob);
-
- nob = offsetof(kib_immediate_msg_t, ibim_payload[payload_nob]);
- kibnal_init_tx_msg (tx, IBNAL_MSG_IMMEDIATE, nob);
-
- tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
- kibnal_launch_tx(tx, target.nid);
- return 0;
-}
-
-void
-kibnal_reply(lnet_ni_t *ni, kib_rx_t *rx, lnet_msg_t *lntmsg)
-{
- lnet_process_id_t target = lntmsg->msg_target;
- unsigned int niov = lntmsg->msg_niov;
- struct iovec *iov = lntmsg->msg_iov;
- lnet_kiov_t *kiov = lntmsg->msg_kiov;
- unsigned int offset = lntmsg->msg_offset;
- unsigned int nob = lntmsg->msg_len;
- kib_tx_t *tx;
- int rc;
-
- tx = kibnal_get_idle_tx();
- if (tx == NULL) {
- CERROR("Can't get tx for REPLY to %s\n",
- libcfs_nid2str(target.nid));
- goto failed_0;
- }
-
- if (nob == 0)
- rc = 0;
- else if (kiov == NULL)
- rc = kibnal_setup_rd_iov(tx, tx->tx_rd, 1,
- niov, iov, offset, nob);
- else
- rc = kibnal_setup_rd_kiov(tx, tx->tx_rd, 1,
- niov, kiov, offset, nob);
-
- if (rc != 0) {
- CERROR("Can't setup GET src for %s: %d\n",
- libcfs_nid2str(target.nid), rc);
- goto failed_1;
- }
-
- rc = kibnal_init_rdma(tx, IBNAL_MSG_GET_DONE, nob,
- &rx->rx_msg->ibm_u.get.ibgm_rd,
- rx->rx_msg->ibm_u.get.ibgm_cookie);
- if (rc < 0) {
- CERROR("Can't setup rdma for GET from %s: %d\n",
- libcfs_nid2str(target.nid), rc);
- goto failed_1;
- }
-
- if (rc == 0) {
- /* No RDMA: local completion may happen now! */
- lnet_finalize(ni, lntmsg, 0);
- } else {
- /* RDMA: lnet_finalize(lntmsg) when it
- * completes */
- tx->tx_lntmsg[0] = lntmsg;
- }
-
- kibnal_queue_tx(tx, rx->rx_conn);
- return;
-
- failed_1:
- kibnal_tx_done(tx);
- failed_0:
- lnet_finalize(ni, lntmsg, -EIO);
-}
-
-int
-kibnal_eager_recv (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg,
- void **new_private)
-{
- kib_rx_t *rx = private;
- kib_conn_t *conn = rx->rx_conn;
-
- if (conn->ibc_version == IBNAL_MSG_VERSION_RDMAREPLYNOTRSRVD) {
- /* Can't block if RDMA completions need normal credits */
- LCONSOLE_ERROR_MSG(0x12d, "Dropping message from %s: no "
- "buffers free. %s is running an old version"
- " of LNET that may deadlock if messages "
- "wait for buffers)\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid),
- libcfs_nid2str(conn->ibc_peer->ibp_nid));
- return -EDEADLK;
- }
-
- *new_private = private;
- return 0;
-}
-
-int
-kibnal_recv (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed,
- unsigned int niov, struct iovec *iov, lnet_kiov_t *kiov,
- unsigned int offset, unsigned int mlen, unsigned int rlen)
-{
- kib_rx_t *rx = private;
- kib_msg_t *rxmsg = rx->rx_msg;
- kib_conn_t *conn = rx->rx_conn;
- kib_tx_t *tx;
- kib_msg_t *txmsg;
- int nob;
- int post_cred = 1;
- int rc = 0;
-
- LASSERT (mlen <= rlen);
- LASSERT (!in_interrupt());
- /* Either all pages or all vaddrs */
- LASSERT (!(kiov != NULL && iov != NULL));
-
- switch (rxmsg->ibm_type) {
- default:
- LBUG();
-
- case IBNAL_MSG_IMMEDIATE:
- nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[rlen]);
- if (nob > rx->rx_nob) {
- CERROR ("Immediate message from %s too big: %d(%d)\n",
- libcfs_nid2str(rxmsg->ibm_u.immediate.ibim_hdr.src_nid),
- nob, rx->rx_nob);
- rc = -EPROTO;
- break;
- }
-
- if (kiov != NULL)
- lnet_copy_flat2kiov(niov, kiov, offset,
- IBNAL_MSG_SIZE, rxmsg,
- offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
- mlen);
- else
- lnet_copy_flat2iov(niov, iov, offset,
- IBNAL_MSG_SIZE, rxmsg,
- offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
- mlen);
- lnet_finalize (ni, lntmsg, 0);
- break;
-
- case IBNAL_MSG_PUT_REQ:
- if (mlen == 0) {
- lnet_finalize(ni, lntmsg, 0);
- kibnal_send_completion(rx->rx_conn, IBNAL_MSG_PUT_NAK, 0,
- rxmsg->ibm_u.putreq.ibprm_cookie);
- break;
- }
-
- tx = kibnal_get_idle_tx();
- if (tx == NULL) {
- CERROR("Can't allocate tx for %s\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid));
- /* Not replying will break the connection */
- rc = -ENOMEM;
- break;
- }
-
- txmsg = tx->tx_msg;
- if (kiov == NULL)
- rc = kibnal_setup_rd_iov(tx,
- &txmsg->ibm_u.putack.ibpam_rd,
- 0,
- niov, iov, offset, mlen);
- else
- rc = kibnal_setup_rd_kiov(tx,
- &txmsg->ibm_u.putack.ibpam_rd,
- 0,
- niov, kiov, offset, mlen);
- if (rc != 0) {
- CERROR("Can't setup PUT sink for %s: %d\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid), rc);
- kibnal_tx_done(tx);
- /* tell peer it's over */
- kibnal_send_completion(rx->rx_conn, IBNAL_MSG_PUT_NAK, rc,
- rxmsg->ibm_u.putreq.ibprm_cookie);
- break;
- }
-
- txmsg->ibm_u.putack.ibpam_src_cookie = rxmsg->ibm_u.putreq.ibprm_cookie;
- txmsg->ibm_u.putack.ibpam_dst_cookie = tx->tx_cookie;
-#if IBNAL_USE_FMR
- nob = sizeof(kib_putack_msg_t);
-#else
- {
- int n = tx->tx_msg->ibm_u.putack.ibpam_rd.rd_nfrag;
-
- nob = offsetof(kib_putack_msg_t, ibpam_rd.rd_frags[n]);
- }
-#endif
- kibnal_init_tx_msg(tx, IBNAL_MSG_PUT_ACK, nob);
-
- tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
- tx->tx_waiting = 1; /* waiting for PUT_DONE */
- kibnal_queue_tx(tx, conn);
-
- if (conn->ibc_version != IBNAL_MSG_VERSION_RDMAREPLYNOTRSRVD)
- post_cred = 0; /* peer still owns 'rx' for sending PUT_DONE */
- break;
-
- case IBNAL_MSG_GET_REQ:
- if (lntmsg != NULL) {
- /* Optimized GET; RDMA lntmsg's payload */
- kibnal_reply(ni, rx, lntmsg);
- } else {
- /* GET didn't match anything */
- kibnal_send_completion(rx->rx_conn, IBNAL_MSG_GET_DONE,
- -ENODATA,
- rxmsg->ibm_u.get.ibgm_cookie);
- }
- break;
- }
-
- kibnal_post_rx(rx, post_cred, 0);
- return rc;
-}
-
-int
-kibnal_thread_start (int (*fn)(void *arg), void *arg)
-{
- long pid = kernel_thread (fn, arg, 0);
-
- if (pid < 0)
- return ((int)pid);
-
- atomic_inc (&kibnal_data.kib_nthreads);
- return (0);
-}
-
-void
-kibnal_thread_fini (void)
-{
- atomic_dec (&kibnal_data.kib_nthreads);
-}
-
-void
-kibnal_peer_alive (kib_peer_t *peer)
-{
- /* This is racy, but everyone's only writing cfs_time_current() */
- peer->ibp_last_alive = cfs_time_current();
- mb();
-}
-
-void
-kibnal_peer_notify (kib_peer_t *peer)
-{
- time_t last_alive = 0;
- int error = 0;
- unsigned long flags;
-
- read_lock_irqsave(&kibnal_data.kib_global_lock, flags);
-
- if (list_empty(&peer->ibp_conns) &&
- peer->ibp_accepting == 0 &&
- peer->ibp_connecting == 0 &&
- peer->ibp_error != 0) {
- error = peer->ibp_error;
- peer->ibp_error = 0;
- last_alive = cfs_time_current_sec() -
- cfs_duration_sec(cfs_time_current() -
- peer->ibp_last_alive);
- }
-
- read_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
-
- if (error != 0)
- lnet_notify(kibnal_data.kib_ni, peer->ibp_nid, 0, last_alive);
-}
-
-void
-kibnal_schedule_conn (kib_conn_t *conn)
-{
- unsigned long flags;
-
- kibnal_conn_addref(conn); /* ++ref for connd */
-
- spin_lock_irqsave(&kibnal_data.kib_connd_lock, flags);
-
- list_add_tail (&conn->ibc_list, &kibnal_data.kib_connd_conns);
- wake_up (&kibnal_data.kib_connd_waitq);
-
- spin_unlock_irqrestore(&kibnal_data.kib_connd_lock, flags);
-}
-
-void
-kibnal_close_conn_locked (kib_conn_t *conn, int error)
-{
- /* This just does the immediate housekeeping to start shutdown of an
- * established connection. 'error' is zero for a normal shutdown.
- * Caller holds kib_global_lock exclusively in irq context */
- kib_peer_t *peer = conn->ibc_peer;
-
- LASSERT (conn->ibc_state >= IBNAL_CONN_ESTABLISHED);
-
- if (conn->ibc_state != IBNAL_CONN_ESTABLISHED)
- return; /* already being handled */
-
- /* NB Can't take ibc_lock here (could be in IRQ context), without
- * risking deadlock, so access to ibc_{tx_queue,active_txs} is racey */
-
- if (error == 0 &&
- list_empty(&conn->ibc_tx_queue) &&
- list_empty(&conn->ibc_tx_queue_rsrvd) &&
- list_empty(&conn->ibc_tx_queue_nocred) &&
- list_empty(&conn->ibc_active_txs)) {
- CDEBUG(D_NET, "closing conn to %s"
- " rx# "LPD64" tx# "LPD64"\n",
- libcfs_nid2str(peer->ibp_nid),
- conn->ibc_txseq, conn->ibc_rxseq);
- } else {
- CDEBUG(D_NETERROR, "Closing conn to %s: error %d%s%s%s%s"
- " rx# "LPD64" tx# "LPD64"\n",
- libcfs_nid2str(peer->ibp_nid), error,
- list_empty(&conn->ibc_tx_queue) ? "" : "(sending)",
- list_empty(&conn->ibc_tx_queue_rsrvd) ? "" : "(sending_rsrvd)",
- list_empty(&conn->ibc_tx_queue_nocred) ? "" : "(sending_nocred)",
- list_empty(&conn->ibc_active_txs) ? "" : "(waiting)",
- conn->ibc_txseq, conn->ibc_rxseq);
-#if 0
- /* can't skip down the queue without holding ibc_lock (see above) */
- list_for_each(tmp, &conn->ibc_tx_queue) {
- kib_tx_t *tx = list_entry(tmp, kib_tx_t, tx_list);
-
- CERROR(" queued tx type %x cookie "LPX64
- " sending %d waiting %d ticks %ld/%d\n",
- tx->tx_msg->ibm_type, tx->tx_cookie,
- tx->tx_sending, tx->tx_waiting,
- (long)(tx->tx_deadline - jiffies), HZ);
- }
-
- list_for_each(tmp, &conn->ibc_active_txs) {
- kib_tx_t *tx = list_entry(tmp, kib_tx_t, tx_list);
-
- CERROR(" active tx type %x cookie "LPX64
- " sending %d waiting %d ticks %ld/%d\n",
- tx->tx_msg->ibm_type, tx->tx_cookie,
- tx->tx_sending, tx->tx_waiting,
- (long)(tx->tx_deadline - jiffies), HZ);
- }
-#endif
- }
-
- list_del (&conn->ibc_list);
-
- if (list_empty (&peer->ibp_conns)) { /* no more conns */
- if (peer->ibp_persistence == 0 && /* non-persistent peer */
- kibnal_peer_active(peer)) /* still in peer table */
- kibnal_unlink_peer_locked (peer);
-
- peer->ibp_error = error; /* set/clear error on last conn */
- }
-
- kibnal_set_conn_state(conn, IBNAL_CONN_DISCONNECTING);
-
- kibnal_schedule_conn(conn);
- kibnal_conn_decref(conn); /* lose ibc_list's ref */
-}
-
-void
-kibnal_close_conn (kib_conn_t *conn, int error)
-{
- unsigned long flags;
-
- write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
-
- kibnal_close_conn_locked (conn, error);
-
- write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
-}
-
-void
-kibnal_handle_early_rxs(kib_conn_t *conn)
-{
- unsigned long flags;
- kib_rx_t *rx;
-
- LASSERT (!in_interrupt());
- LASSERT (conn->ibc_state >= IBNAL_CONN_ESTABLISHED);
-
- write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
- while (!list_empty(&conn->ibc_early_rxs)) {
- rx = list_entry(conn->ibc_early_rxs.next,
- kib_rx_t, rx_list);
- list_del(&rx->rx_list);
- write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
-
- kibnal_handle_rx(rx);
-
- write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
- }
- write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
-}
-
-void
-kibnal_abort_txs(kib_conn_t *conn, struct list_head *txs)
-{
- LIST_HEAD (zombies);
- struct list_head *tmp;
- struct list_head *nxt;
- kib_tx_t *tx;
-
- spin_lock(&conn->ibc_lock);
-
- list_for_each_safe (tmp, nxt, txs) {
- tx = list_entry (tmp, kib_tx_t, tx_list);
-
- if (txs == &conn->ibc_active_txs) {
- LASSERT (!tx->tx_queued);
- LASSERT (tx->tx_waiting || tx->tx_sending != 0);
- } else {
- LASSERT (tx->tx_queued);
- }
-
- tx->tx_status = -ECONNABORTED;
- tx->tx_queued = 0;
- tx->tx_waiting = 0;
-
- if (tx->tx_sending == 0) {
- list_del (&tx->tx_list);
- list_add (&tx->tx_list, &zombies);
- }
- }
-
- spin_unlock(&conn->ibc_lock);
-
- kibnal_txlist_done(&zombies, -ECONNABORTED);
-}
-
-void
-kibnal_conn_disconnected(kib_conn_t *conn)
-{
- static IB_QP_ATTRIBUTES_MODIFY qpam = {.RequestState = QPStateError};
-
- FSTATUS frc;
-
- LASSERT (conn->ibc_state >= IBNAL_CONN_INIT_QP);
-
- kibnal_set_conn_state(conn, IBNAL_CONN_DISCONNECTED);
-
- /* move QP to error state to make posted work items complete */
- frc = iba_modify_qp(conn->ibc_qp, &qpam, NULL);
- if (frc != FSUCCESS)
- CERROR("can't move qp state to error: %d\n", frc);
-
- /* Complete all tx descs not waiting for sends to complete.
- * NB we should be safe from RDMA now that the QP has changed state */
-
- kibnal_abort_txs(conn, &conn->ibc_tx_queue);
- kibnal_abort_txs(conn, &conn->ibc_tx_queue_rsrvd);
- kibnal_abort_txs(conn, &conn->ibc_tx_queue);
- kibnal_abort_txs(conn, &conn->ibc_active_txs);
-
- kibnal_handle_early_rxs(conn);
-}
-
-void
-kibnal_peer_connect_failed (kib_peer_t *peer, int type, int error)
-{
- LIST_HEAD (zombies);
- unsigned long flags;
-
- LASSERT (error != 0);
- LASSERT (!in_interrupt());
-
- write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
-
- LASSERT (kibnal_peer_connecting(peer));
-
- switch (type) {
- case IBNAL_CONN_ACTIVE:
- LASSERT (peer->ibp_connecting > 0);
- peer->ibp_connecting--;
- break;
-
- case IBNAL_CONN_PASSIVE:
- LASSERT (peer->ibp_accepting > 0);
- peer->ibp_accepting--;
- break;
-
- case IBNAL_CONN_WAITING:
- /* Can't assert; I might be racing with a successful connection
- * which clears passivewait */
- peer->ibp_passivewait = 0;
- break;
- default:
- LBUG();
- }
-
- if (kibnal_peer_connecting(peer) || /* another attempt underway */
- !list_empty(&peer->ibp_conns)) { /* got connected */
- write_unlock_irqrestore (&kibnal_data.kib_global_lock, flags);
- return;
- }
-
- /* Say when active connection can be re-attempted */
- peer->ibp_reconnect_interval *= 2;
- peer->ibp_reconnect_interval =
- MAX(peer->ibp_reconnect_interval,
- *kibnal_tunables.kib_min_reconnect_interval);
- peer->ibp_reconnect_interval =
- MIN(peer->ibp_reconnect_interval,
- *kibnal_tunables.kib_max_reconnect_interval);
-
- peer->ibp_reconnect_time = jiffies + peer->ibp_reconnect_interval * HZ;
-
- /* Take peer's blocked transmits to complete with error */
- list_add(&zombies, &peer->ibp_tx_queue);
- list_del_init(&peer->ibp_tx_queue);
-
- if (kibnal_peer_active(peer) &&
- peer->ibp_persistence == 0) {
- /* failed connection attempt on non-persistent peer */
- kibnal_unlink_peer_locked (peer);
- }
-
- peer->ibp_error = error;
-
- write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
-
- kibnal_peer_notify(peer);
-
- if (list_empty (&zombies))
- return;
-
- CDEBUG (D_NETERROR, "Deleting messages for %s: connection failed\n",
- libcfs_nid2str(peer->ibp_nid));
-
- kibnal_txlist_done (&zombies, -EHOSTUNREACH);
-}
-
-void
-kibnal_connreq_done (kib_conn_t *conn, int type, int status)
-{
- kib_peer_t *peer = conn->ibc_peer;
- struct list_head txs;
- kib_tx_t *tx;
- unsigned long flags;
-
- LASSERT (!in_interrupt());
- LASSERT (type == IBNAL_CONN_ACTIVE || type == IBNAL_CONN_PASSIVE);
- LASSERT (conn->ibc_state >= IBNAL_CONN_INIT_QP);
- LASSERT (conn->ibc_state < IBNAL_CONN_ESTABLISHED);
- LASSERT (kibnal_peer_connecting(peer));
-
- LIBCFS_FREE(conn->ibc_cvars, sizeof(*conn->ibc_cvars));
- conn->ibc_cvars = NULL;
-
- if (status != 0) {
- /* failed to establish connection */
- kibnal_peer_connect_failed(conn->ibc_peer, type, status);
- kibnal_conn_disconnected(conn);
- kibnal_conn_decref(conn); /* Lose CM's ref */
- return;
- }
-
- /* connection established */
- LASSERT(conn->ibc_state == IBNAL_CONN_CONNECTING);
-
- conn->ibc_last_send = jiffies;
- kibnal_set_conn_state(conn, IBNAL_CONN_ESTABLISHED);
- kibnal_peer_alive(peer);
-
- CDEBUG(D_NET, "Connection %s ESTABLISHED\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid));
-
- write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
-
- peer->ibp_passivewait = 0; /* not waiting (got conn now) */
- kibnal_conn_addref(conn); /* +1 ref for ibc_list */
- list_add_tail(&conn->ibc_list, &peer->ibp_conns);
-
- if (!kibnal_peer_active(peer)) {
- /* peer has been deleted */
- kibnal_close_conn_locked(conn, -ECONNABORTED);
- write_unlock_irqrestore (&kibnal_data.kib_global_lock, flags);
-
- kibnal_peer_connect_failed(conn->ibc_peer, type, -ECONNABORTED);
- kibnal_conn_decref(conn); /* lose CM's ref */
- return;
- }
-
- switch (type) {
- case IBNAL_CONN_ACTIVE:
- LASSERT (peer->ibp_connecting > 0);
- peer->ibp_connecting--;
- break;
-
- case IBNAL_CONN_PASSIVE:
- LASSERT (peer->ibp_accepting > 0);
- peer->ibp_accepting--;
- break;
- default:
- LBUG();
- }
-
- peer->ibp_reconnect_interval = 0; /* OK to reconnect at any time */
-
- /* Nuke any dangling conns from a different peer instance... */
- kibnal_close_stale_conns_locked(peer, conn->ibc_incarnation);
-
- /* grab txs blocking for a conn */
- list_add(&txs, &peer->ibp_tx_queue);
- list_del_init(&peer->ibp_tx_queue);
-
- write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
-
- /* Schedule blocked txs */
- spin_lock (&conn->ibc_lock);
- while (!list_empty (&txs)) {
- tx = list_entry (txs.next, kib_tx_t, tx_list);
- list_del (&tx->tx_list);
-
- kibnal_queue_tx_locked (tx, conn);
- }
- spin_unlock (&conn->ibc_lock);
- kibnal_check_sends (conn);
-}
-
-void
-kibnal_reject (lnet_nid_t nid, IB_HANDLE cep, int why)
-{
- static CM_REJECT_INFO msgs[3];
- CM_REJECT_INFO *msg = &msgs[why];
- FSTATUS frc;
-
- LASSERT (why >= 0 && why < sizeof(msgs)/sizeof(msgs[0]));
-
- /* If I wasn't so lazy, I'd initialise this only once; it's effectively
- * read-only... */
- msg->Reason = RC_USER_REJ;
- msg->PrivateData[0] = (IBNAL_MSG_MAGIC) & 0xff;
- msg->PrivateData[1] = (IBNAL_MSG_MAGIC >> 8) & 0xff;
- msg->PrivateData[2] = (IBNAL_MSG_MAGIC >> 16) & 0xff;
- msg->PrivateData[3] = (IBNAL_MSG_MAGIC >> 24) & 0xff;
- msg->PrivateData[4] = (IBNAL_MSG_VERSION) & 0xff;
- msg->PrivateData[5] = (IBNAL_MSG_VERSION >> 8) & 0xff;
- msg->PrivateData[6] = why;
-
- frc = iba_cm_reject(cep, msg);
- if (frc != FSUCCESS)
- CERROR("Error %d rejecting %s\n", frc, libcfs_nid2str(nid));
-}
-
-void
-kibnal_check_connreject(kib_conn_t *conn, int type, CM_REJECT_INFO *rej)
-{
- kib_peer_t *peer = conn->ibc_peer;
- unsigned long flags;
- int magic;
- int version;
- int why;
-
- LASSERT (type == IBNAL_CONN_ACTIVE ||
- type == IBNAL_CONN_PASSIVE);
-
- CDEBUG(D_NET, "%s connection with %s rejected: %d\n",
- (type == IBNAL_CONN_ACTIVE) ? "Active" : "Passive",
- libcfs_nid2str(peer->ibp_nid), rej->Reason);
-
- switch (rej->Reason) {
- case RC_STALE_CONN:
- if (type == IBNAL_CONN_PASSIVE) {
- CERROR("Connection to %s rejected (stale QP)\n",
- libcfs_nid2str(peer->ibp_nid));
- } else {
- CWARN("Connection from %s rejected (stale QP): "
- "retrying...\n", libcfs_nid2str(peer->ibp_nid));
-
- /* retry from scratch to allocate a new conn
- * which will use a different QP */
- kibnal_schedule_active_connect(peer, peer->ibp_version);
- }
-
- /* An FCM_DISCONNECTED callback is still outstanding: give it a
- * ref since kibnal_connreq_done() drops the CM's ref on conn
- * on failure */
- kibnal_conn_addref(conn);
- break;
-
- case RC_USER_REJ:
- magic = (rej->PrivateData[0]) |
- (rej->PrivateData[1] << 8) |
- (rej->PrivateData[2] << 16) |
- (rej->PrivateData[3] << 24);
- version = (rej->PrivateData[4]) |
- (rej->PrivateData[5] << 8);
- why = (rej->PrivateData[6]);
-
- /* retry with old proto version */
- if (magic == IBNAL_MSG_MAGIC &&
- version == IBNAL_MSG_VERSION_RDMAREPLYNOTRSRVD &&
- conn->ibc_version == IBNAL_MSG_VERSION &&
- type != IBNAL_CONN_PASSIVE) {
- /* retry with a new conn */
- CWARN ("Connection to %s refused: "
- "retrying with old protocol version 0x%x\n",
- libcfs_nid2str(peer->ibp_nid), version);
- kibnal_schedule_active_connect(peer, version);
- break;
- }
-
- if (magic != IBNAL_MSG_MAGIC ||
- version != IBNAL_MSG_VERSION) {
- CERROR("%s connection with %s rejected "
- "(magic/ver %08x/%d why %d): "
- "incompatible protocol\n",
- (type == IBNAL_CONN_ACTIVE) ?
- "Active" : "Passive",
- libcfs_nid2str(peer->ibp_nid),
- magic, version, why);
- break;
- }
-
- if (type == IBNAL_CONN_ACTIVE &&
- why == IBNAL_REJECT_CONN_RACE) {
- /* lost connection race */
- CWARN("Connection to %s rejected: "
- "lost connection race\n",
- libcfs_nid2str(peer->ibp_nid));
-
- write_lock_irqsave(&kibnal_data.kib_global_lock,
- flags);
-
- if (list_empty(&peer->ibp_conns)) {
- peer->ibp_passivewait = 1;
- peer->ibp_passivewait_deadline =
- jiffies +
- (*kibnal_tunables.kib_timeout * HZ);
- }
- write_unlock_irqrestore(&kibnal_data.kib_global_lock,
- flags);
- break;
- }
-
- CERROR("%s connection with %s rejected: %d\n",
- (type == IBNAL_CONN_ACTIVE) ? "Active" : "Passive",
- libcfs_nid2str(peer->ibp_nid), why);
- break;
-
- default:
- CERROR("%s connection with %s rejected: %d\n",
- (type == IBNAL_CONN_ACTIVE) ? "Active" : "Passive",
- libcfs_nid2str(peer->ibp_nid), rej->Reason);
- }
-
- kibnal_connreq_done(conn, type, -ECONNREFUSED);
-}
-
-void
-kibnal_cm_disconnect_callback(kib_conn_t *conn, CM_CONN_INFO *info)
-{
- CDEBUG(D_NET, "%s: state %d, status 0x%x\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid),
- conn->ibc_state, info->Status);
-
- LASSERT (conn->ibc_state >= IBNAL_CONN_ESTABLISHED);
-
- switch (info->Status) {
- default:
- LBUG();
- break;
-
- case FCM_DISCONNECT_REQUEST:
- /* Schedule conn to iba_cm_disconnect() if it wasn't already */
- kibnal_close_conn (conn, 0);
- break;
-
- case FCM_DISCONNECT_REPLY: /* peer acks my disconnect req */
- case FCM_DISCONNECTED: /* end of TIME_WAIT */
- CDEBUG(D_NET, "Connection %s disconnected.\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid));
- kibnal_conn_decref(conn); /* Lose CM's ref */
- break;
- }
-}
-
-void
-kibnal_cm_passive_callback(IB_HANDLE cep, CM_CONN_INFO *info, void *arg)
-{
- kib_conn_t *conn = arg;
-
- CDEBUG(D_NET, "status 0x%x\n", info->Status);
-
- /* Established Connection Notifier */
- switch (info->Status) {
- default:
- CERROR("Unexpected status %d on Connection %s\n",
- info->Status, libcfs_nid2str(conn->ibc_peer->ibp_nid));
- LBUG();
- break;
-
- case FCM_CONNECT_TIMEOUT:
- kibnal_connreq_done(conn, IBNAL_CONN_PASSIVE, -ETIMEDOUT);
- break;
-
- case FCM_CONNECT_REJECT:
- kibnal_check_connreject(conn, IBNAL_CONN_PASSIVE,
- &info->Info.Reject);
- break;
-
- case FCM_CONNECT_ESTABLISHED:
- kibnal_connreq_done(conn, IBNAL_CONN_PASSIVE, 0);
- break;
-
- case FCM_DISCONNECT_REQUEST:
- case FCM_DISCONNECT_REPLY:
- case FCM_DISCONNECTED:
- kibnal_cm_disconnect_callback(conn, info);
- break;
- }
-}
-
-int
-kibnal_accept (kib_conn_t **connp, IB_HANDLE cep, kib_msg_t *msg, int nob)
-{
- lnet_nid_t nid;
- kib_conn_t *conn;
- kib_peer_t *peer;
- kib_peer_t *peer2;
- unsigned long flags;
- int rc;
-
- rc = kibnal_unpack_msg(msg, 0, nob);
- if (rc != 0) {
- /* SILENT! kibnal_unpack_msg() complains if required */
- kibnal_reject(LNET_NID_ANY, cep, IBNAL_REJECT_FATAL);
- return -EPROTO;
- }
-
- nid = msg->ibm_srcnid;
-
- if (msg->ibm_version != IBNAL_MSG_VERSION)
- CWARN("Connection from %s: old protocol version 0x%x\n",
- libcfs_nid2str(nid), msg->ibm_version);
-
- if (msg->ibm_type != IBNAL_MSG_CONNREQ) {
- CERROR("Can't accept %s: bad request type %d (%d expected)\n",
- libcfs_nid2str(nid), msg->ibm_type, IBNAL_MSG_CONNREQ);
- kibnal_reject(nid, cep, IBNAL_REJECT_FATAL);
- return -EPROTO;
- }
-
- if (msg->ibm_dstnid != kibnal_data.kib_ni->ni_nid) {
- CERROR("Can't accept %s: bad dst NID %s (%s expected)\n",
- libcfs_nid2str(nid),
- libcfs_nid2str(msg->ibm_dstnid),
- libcfs_nid2str(kibnal_data.kib_ni->ni_nid));
- kibnal_reject(nid, cep, IBNAL_REJECT_FATAL);
- return -EPROTO;
- }
-
- if (msg->ibm_u.connparams.ibcp_queue_depth != IBNAL_MSG_QUEUE_SIZE ||
- msg->ibm_u.connparams.ibcp_max_msg_size > IBNAL_MSG_SIZE ||
- msg->ibm_u.connparams.ibcp_max_frags > IBNAL_MAX_RDMA_FRAGS) {
- CERROR("Reject %s: q %d sz %d frag %d, (%d %d %d expected)\n",
- libcfs_nid2str(nid),
- msg->ibm_u.connparams.ibcp_queue_depth,
- msg->ibm_u.connparams.ibcp_max_msg_size,
- msg->ibm_u.connparams.ibcp_max_frags,
- IBNAL_MSG_QUEUE_SIZE,
- IBNAL_MSG_SIZE,
- IBNAL_MAX_RDMA_FRAGS);
- kibnal_reject(nid, cep, IBNAL_REJECT_FATAL);
- return -EPROTO;
- }
-
- conn = kibnal_create_conn(nid, msg->ibm_version);
- if (conn == NULL) {
- kibnal_reject(nid, cep, IBNAL_REJECT_NO_RESOURCES);
- return -ENOMEM;
- }
-
- /* assume 'nid' is a new peer */
- rc = kibnal_create_peer(&peer, nid);
- if (rc != 0) {
- kibnal_conn_decref(conn);
- kibnal_reject(nid, cep, IBNAL_REJECT_NO_RESOURCES);
- return -ENOMEM;
- }
-
- write_lock_irqsave (&kibnal_data.kib_global_lock, flags);
-
- if (kibnal_data.kib_listener_cep == NULL) { /* shutdown started */
- write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
-
- kibnal_peer_decref(peer);
- kibnal_conn_decref(conn);
- kibnal_reject(nid, cep, IBNAL_REJECT_NO_RESOURCES);
- return -ESHUTDOWN;
- }
-
- peer2 = kibnal_find_peer_locked(nid);
- if (peer2 == NULL) {
- /* peer table takes my ref on peer */
- list_add_tail (&peer->ibp_list, kibnal_nid2peerlist(nid));
- LASSERT (peer->ibp_connecting == 0);
- } else {
- kibnal_peer_decref(peer);
- peer = peer2;
-
- if (peer->ibp_connecting != 0 &&
- peer->ibp_nid < kibnal_data.kib_ni->ni_nid) {
- /* Resolve concurrent connection attempts in favour of
- * the higher NID */
- write_unlock_irqrestore(&kibnal_data.kib_global_lock,
- flags);
- kibnal_conn_decref(conn);
- kibnal_reject(nid, cep, IBNAL_REJECT_CONN_RACE);
- return -EALREADY;
- }
- }
-
- kibnal_peer_addref(peer); /* +1 ref for conn */
- peer->ibp_accepting++;
-
- kibnal_set_conn_state(conn, IBNAL_CONN_CONNECTING);
- conn->ibc_peer = peer;
- conn->ibc_incarnation = msg->ibm_srcstamp;
- conn->ibc_credits = IBNAL_MSG_QUEUE_SIZE;
- conn->ibc_reserved_credits = IBNAL_MSG_QUEUE_SIZE;
- LASSERT (conn->ibc_credits + conn->ibc_reserved_credits
- <= IBNAL_RX_MSGS);
-
- write_unlock_irqrestore (&kibnal_data.kib_global_lock, flags);
-
- *connp = conn;
- return 0;
-}
-
-void
-kibnal_listen_callback(IB_HANDLE cep, CM_CONN_INFO *info, void *arg)
-{
-
- CM_REQUEST_INFO *req = &info->Info.Request;
- CM_REPLY_INFO *rep;
- kib_conn_t *conn;
- FSTATUS frc;
- int rc;
-
- LASSERT(arg == NULL); /* no conn yet for passive */
-
- CDEBUG(D_NET, "%x\n", info->Status);
-
- if (info->Status == FCM_CONNECT_CANCEL) {
- up(&kibnal_data.kib_listener_signal);
- return;
- }
-
- LASSERT (info->Status == FCM_CONNECT_REQUEST);
-
- rc = kibnal_accept(&conn, cep, (kib_msg_t *)req->PrivateData,
- CM_REQUEST_INFO_USER_LEN);
- if (rc != 0) /* kibnal_accept has rejected */
- return;
-
- conn->ibc_cvars->cv_path = req->PathInfo.Path;
-
- rc = kibnal_conn_rts(conn,
- req->CEPInfo.QPN,
- req->CEPInfo.OfferedInitiatorDepth,
- req->CEPInfo.OfferedResponderResources,
- req->CEPInfo.StartingPSN);
- if (rc != 0) {
- kibnal_reject(conn->ibc_peer->ibp_nid, cep,
- IBNAL_REJECT_NO_RESOURCES);
- kibnal_connreq_done(conn, IBNAL_CONN_PASSIVE, -ECONNABORTED);
- return;
- }
-
- memset(&conn->ibc_cvars->cv_cmci, 0, sizeof(conn->ibc_cvars->cv_cmci));
- rep = &conn->ibc_cvars->cv_cmci.Info.Reply;
-
- rep->QPN = conn->ibc_cvars->cv_qpattrs.QPNumber;
- rep->QKey = conn->ibc_cvars->cv_qpattrs.Qkey;
- rep->StartingPSN = conn->ibc_cvars->cv_qpattrs.RecvPSN;
- rep->EndToEndFlowControl = conn->ibc_cvars->cv_qpattrs.FlowControl;
- rep->ArbInitiatorDepth = conn->ibc_cvars->cv_qpattrs.InitiatorDepth;
- rep->ArbResponderResources = conn->ibc_cvars->cv_qpattrs.ResponderResources;
- rep->TargetAckDelay = kibnal_data.kib_hca_attrs.LocalCaAckDelay;
- rep->FailoverAccepted = IBNAL_FAILOVER_ACCEPTED;
- rep->RnRRetryCount = req->CEPInfo.RnrRetryCount;
-
- CLASSERT (CM_REPLY_INFO_USER_LEN >=
- offsetof(kib_msg_t, ibm_u) + sizeof(kib_connparams_t));
-
- kibnal_pack_connmsg((kib_msg_t *)rep->PrivateData,
- conn->ibc_version,
- CM_REPLY_INFO_USER_LEN,
- IBNAL_MSG_CONNACK,
- conn->ibc_peer->ibp_nid, conn->ibc_incarnation);
-
- LASSERT (conn->ibc_cep == NULL);
- kibnal_set_conn_state(conn, IBNAL_CONN_CONNECTING);
-
- frc = iba_cm_accept(cep,
- &conn->ibc_cvars->cv_cmci,
- NULL,
- kibnal_cm_passive_callback, conn,
- &conn->ibc_cep);
-
- if (frc == FSUCCESS || frc == FPENDING)
- return;
-
- CERROR("iba_cm_accept(%s) failed: %d\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid), frc);
- kibnal_connreq_done(conn, IBNAL_CONN_PASSIVE, -ECONNABORTED);
-}
-
-void
-kibnal_check_connreply(kib_conn_t *conn, CM_REPLY_INFO *rep)
-{
- kib_msg_t *msg = (kib_msg_t *)rep->PrivateData;
- lnet_nid_t nid = conn->ibc_peer->ibp_nid;
- FSTATUS frc;
- int rc;
-
- rc = kibnal_unpack_msg(msg, conn->ibc_version, CM_REPLY_INFO_USER_LEN);
- if (rc != 0) {
- CERROR ("Error %d unpacking connack from %s\n",
- rc, libcfs_nid2str(nid));
- kibnal_reject(nid, conn->ibc_cep, IBNAL_REJECT_FATAL);
- kibnal_connreq_done(conn, IBNAL_CONN_ACTIVE, -EPROTO);
- return;
- }
-
- if (msg->ibm_type != IBNAL_MSG_CONNACK) {
- CERROR("Bad connack request type %d (%d expected) from %s\n",
- msg->ibm_type, IBNAL_MSG_CONNREQ,
- libcfs_nid2str(msg->ibm_srcnid));
- kibnal_reject(nid, conn->ibc_cep, IBNAL_REJECT_FATAL);
- kibnal_connreq_done(conn, IBNAL_CONN_ACTIVE, -EPROTO);
- return;
- }
-
- if (msg->ibm_srcnid != conn->ibc_peer->ibp_nid ||
- msg->ibm_dstnid != kibnal_data.kib_ni->ni_nid ||
- msg->ibm_dststamp != kibnal_data.kib_incarnation) {
- CERROR("Stale connack from %s(%s): %s(%s), "LPX64"("LPX64")\n",
- libcfs_nid2str(msg->ibm_srcnid),
- libcfs_nid2str(conn->ibc_peer->ibp_nid),
- libcfs_nid2str(msg->ibm_dstnid),
- libcfs_nid2str(kibnal_data.kib_ni->ni_nid),
- msg->ibm_dststamp, kibnal_data.kib_incarnation);
- kibnal_reject(nid, conn->ibc_cep, IBNAL_REJECT_FATAL);
- kibnal_connreq_done(conn, IBNAL_CONN_ACTIVE, -ESTALE);
- return;
- }
-
- if (msg->ibm_u.connparams.ibcp_queue_depth != IBNAL_MSG_QUEUE_SIZE ||
- msg->ibm_u.connparams.ibcp_max_msg_size > IBNAL_MSG_SIZE ||
- msg->ibm_u.connparams.ibcp_max_frags > IBNAL_MAX_RDMA_FRAGS) {
- CERROR("Reject %s: q %d sz %d frag %d, (%d %d %d expected)\n",
- libcfs_nid2str(msg->ibm_srcnid),
- msg->ibm_u.connparams.ibcp_queue_depth,
- msg->ibm_u.connparams.ibcp_max_msg_size,
- msg->ibm_u.connparams.ibcp_max_frags,
- IBNAL_MSG_QUEUE_SIZE,
- IBNAL_MSG_SIZE,
- IBNAL_MAX_RDMA_FRAGS);
- kibnal_reject(nid, conn->ibc_cep, IBNAL_REJECT_FATAL);
- kibnal_connreq_done(conn, IBNAL_CONN_ACTIVE, -EPROTO);
- return;
- }
-
- CDEBUG(D_NET, "Connection %s REP_RECEIVED.\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid));
-
- conn->ibc_incarnation = msg->ibm_srcstamp;
- conn->ibc_credits = IBNAL_MSG_QUEUE_SIZE;
- conn->ibc_reserved_credits = IBNAL_MSG_QUEUE_SIZE;
- LASSERT (conn->ibc_credits + conn->ibc_reserved_credits
- <= IBNAL_RX_MSGS);
-
- rc = kibnal_conn_rts(conn,
- rep->QPN,
- rep->ArbInitiatorDepth,
- rep->ArbResponderResources,
- rep->StartingPSN);
- if (rc != 0) {
- kibnal_reject(nid, conn->ibc_cep, IBNAL_REJECT_NO_RESOURCES);
- kibnal_connreq_done(conn, IBNAL_CONN_ACTIVE, -EIO);
- return;
- }
-
- memset(&conn->ibc_cvars->cv_cmci, 0, sizeof(conn->ibc_cvars->cv_cmci));
-
- frc = iba_cm_accept(conn->ibc_cep,
- &conn->ibc_cvars->cv_cmci,
- NULL, NULL, NULL, NULL);
-
- if (frc == FCM_CONNECT_ESTABLISHED) {
- kibnal_connreq_done(conn, IBNAL_CONN_ACTIVE, 0);
- return;
- }
-
- CERROR("Connection %s CMAccept failed: %d\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid), frc);
- kibnal_connreq_done(conn, IBNAL_CONN_ACTIVE, -ECONNABORTED);
-}
-
-void
-kibnal_cm_active_callback(IB_HANDLE cep, CM_CONN_INFO *info, void *arg)
-{
- kib_conn_t *conn = arg;
-
- CDEBUG(D_NET, "status 0x%x\n", info->Status);
-
- switch (info->Status) {
- default:
- CERROR("unknown status %d on Connection %s\n",
- info->Status, libcfs_nid2str(conn->ibc_peer->ibp_nid));
- LBUG();
- break;
-
- case FCM_CONNECT_TIMEOUT:
- kibnal_connreq_done(conn, IBNAL_CONN_ACTIVE, -ETIMEDOUT);
- break;
-
- case FCM_CONNECT_REJECT:
- kibnal_check_connreject(conn, IBNAL_CONN_ACTIVE,
- &info->Info.Reject);
- break;
-
- case FCM_CONNECT_REPLY:
- kibnal_check_connreply(conn, &info->Info.Reply);
- break;
-
- case FCM_DISCONNECT_REQUEST:
- case FCM_DISCONNECT_REPLY:
- case FCM_DISCONNECTED:
- kibnal_cm_disconnect_callback(conn, info);
- break;
- }
-}
-
-void
-dump_path_records(PATH_RESULTS *results)
-{
- IB_PATH_RECORD *path;
- int i;
-
- for (i = 0; i < results->NumPathRecords; i++) {
- path = &results->PathRecords[i];
- CDEBUG(D_NET, "%d: sgid "LPX64":"LPX64" dgid "
- LPX64":"LPX64" pkey %x\n",
- i,
- path->SGID.Type.Global.SubnetPrefix,
- path->SGID.Type.Global.InterfaceID,
- path->DGID.Type.Global.SubnetPrefix,
- path->DGID.Type.Global.InterfaceID,
- path->P_Key);
- }
-}
-
-void
-kibnal_pathreq_callback (void *arg, QUERY *qry,
- QUERY_RESULT_VALUES *qrslt)
-{
- IB_CA_ATTRIBUTES *ca_attr = &kibnal_data.kib_hca_attrs;
- kib_conn_t *conn = arg;
- CM_REQUEST_INFO *req = &conn->ibc_cvars->cv_cmci.Info.Request;
- PATH_RESULTS *path = (PATH_RESULTS *)qrslt->QueryResult;
- FSTATUS frc;
-
- if (qrslt->Status != FSUCCESS ||
- qrslt->ResultDataSize < sizeof(*path)) {
- CDEBUG (D_NETERROR, "pathreq %s failed: status %d data size %d\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid),
- qrslt->Status, qrslt->ResultDataSize);
- kibnal_connreq_done(conn, IBNAL_CONN_ACTIVE, -EHOSTUNREACH);
- return;
- }
-
- if (path->NumPathRecords < 1) {
- CDEBUG (D_NETERROR, "pathreq %s failed: no path records\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid));
- kibnal_connreq_done(conn, IBNAL_CONN_ACTIVE, -EHOSTUNREACH);
- return;
- }
-
- //dump_path_records(path);
- conn->ibc_cvars->cv_path = path->PathRecords[0];
-
- LASSERT (conn->ibc_cep == NULL);
-
- conn->ibc_cep = kibnal_create_cep(conn->ibc_peer->ibp_nid);
- if (conn->ibc_cep == NULL) {
- kibnal_connreq_done(conn, IBNAL_CONN_ACTIVE, -ENOMEM);
- return;
- }
-
- memset(req, 0, sizeof(*req));
- req->SID = conn->ibc_cvars->cv_svcrec.RID.ServiceID;
- req->CEPInfo.CaGUID = kibnal_data.kib_hca_guids[kibnal_data.kib_hca_idx];
- req->CEPInfo.EndToEndFlowControl = IBNAL_EE_FLOW;
- req->CEPInfo.PortGUID = conn->ibc_cvars->cv_path.SGID.Type.Global.InterfaceID;
- req->CEPInfo.RetryCount = IBNAL_RETRY;
- req->CEPInfo.RnrRetryCount = IBNAL_RNR_RETRY;
- req->CEPInfo.AckTimeout = IBNAL_ACK_TIMEOUT;
- req->CEPInfo.StartingPSN = IBNAL_STARTING_PSN;
- req->CEPInfo.QPN = conn->ibc_cvars->cv_qpattrs.QPNumber;
- req->CEPInfo.QKey = conn->ibc_cvars->cv_qpattrs.Qkey;
- req->CEPInfo.OfferedResponderResources = ca_attr->MaxQPResponderResources;
- req->CEPInfo.OfferedInitiatorDepth = ca_attr->MaxQPInitiatorDepth;
- req->PathInfo.bSubnetLocal = IBNAL_LOCAL_SUB;
- req->PathInfo.Path = conn->ibc_cvars->cv_path;
-
- CLASSERT (CM_REQUEST_INFO_USER_LEN >=
- offsetof(kib_msg_t, ibm_u) + sizeof(kib_connparams_t));
-
- kibnal_pack_connmsg((kib_msg_t *)req->PrivateData,
- conn->ibc_version,
- CM_REQUEST_INFO_USER_LEN,
- IBNAL_MSG_CONNREQ,
- conn->ibc_peer->ibp_nid, 0);
-
- if (the_lnet.ln_testprotocompat != 0) {
- /* single-shot proto test */
- LNET_LOCK();
- if ((the_lnet.ln_testprotocompat & 1) != 0) {
- ((kib_msg_t *)req->PrivateData)->ibm_version++;
- the_lnet.ln_testprotocompat &= ~1;
- }
- if ((the_lnet.ln_testprotocompat & 2) != 0) {
- ((kib_msg_t *)req->PrivateData)->ibm_magic =
- LNET_PROTO_MAGIC;
- the_lnet.ln_testprotocompat &= ~2;
- }
- LNET_UNLOCK();
- }
-
- /* Flag I'm getting involved with the CM... */
- kibnal_set_conn_state(conn, IBNAL_CONN_CONNECTING);
-
- /* cm callback gets my conn ref */
- frc = iba_cm_connect(conn->ibc_cep, req,
- kibnal_cm_active_callback, conn);
- if (frc == FPENDING || frc == FSUCCESS)
- return;
-
- CERROR ("Connect %s failed: %d\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid), frc);
- kibnal_connreq_done(conn, IBNAL_CONN_ACTIVE, -EHOSTUNREACH);
-}
-
-void
-kibnal_dump_service_records(SERVICE_RECORD_RESULTS *results)
-{
- IB_SERVICE_RECORD *svc;
- int i;
-
- for (i = 0; i < results->NumServiceRecords; i++) {
- svc = &results->ServiceRecords[i];
- CDEBUG(D_NET, "%d: sid "LPX64" gid "LPX64":"LPX64" pkey %x\n",
- i,
- svc->RID.ServiceID,
- svc->RID.ServiceGID.Type.Global.SubnetPrefix,
- svc->RID.ServiceGID.Type.Global.InterfaceID,
- svc->RID.ServiceP_Key);
- }
-}
-
-void
-kibnal_service_get_callback (void *arg, QUERY *qry,
- QUERY_RESULT_VALUES *qrslt)
-{
- kib_conn_t *conn = arg;
- SERVICE_RECORD_RESULTS *svc;
- FSTATUS frc;
-
- if (qrslt->Status != FSUCCESS ||
- qrslt->ResultDataSize < sizeof(*svc)) {
- CDEBUG (D_NETERROR, "Lookup %s failed: status %d data size %d\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid),
- qrslt->Status, qrslt->ResultDataSize);
- kibnal_connreq_done(conn, IBNAL_CONN_ACTIVE, -EHOSTUNREACH);
- return;
- }
-
- svc = (SERVICE_RECORD_RESULTS *)qrslt->QueryResult;
- if (svc->NumServiceRecords < 1) {
- CDEBUG (D_NETERROR, "lookup %s failed: no service records\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid));
- kibnal_connreq_done(conn, IBNAL_CONN_ACTIVE, -EHOSTUNREACH);
- return;
- }
-
- //kibnal_dump_service_records(svc);
- conn->ibc_cvars->cv_svcrec = svc->ServiceRecords[0];
-
- qry = &conn->ibc_cvars->cv_query;
- memset(qry, 0, sizeof(*qry));
-
- qry->OutputType = OutputTypePathRecord;
- qry->InputType = InputTypePortGuidPair;
-
- qry->InputValue.PortGuidPair.SourcePortGuid =
- kibnal_data.kib_port_guid;
- qry->InputValue.PortGuidPair.DestPortGuid =
- conn->ibc_cvars->cv_svcrec.RID.ServiceGID.Type.Global.InterfaceID;
-
- /* kibnal_pathreq_callback gets my conn ref */
- frc = iba_sd_query_port_fabric_info(kibnal_data.kib_sd,
- kibnal_data.kib_port_guid,
- qry,
- kibnal_pathreq_callback,
- &kibnal_data.kib_sdretry,
- conn);
- if (frc == FPENDING)
- return;
-
- CERROR ("pathreq %s failed: %d\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid), frc);
- kibnal_connreq_done(conn, IBNAL_CONN_ACTIVE, -EHOSTUNREACH);
-}
-
-void
-kibnal_connect_peer (kib_peer_t *peer)
-{
- QUERY *qry;
- FSTATUS frc;
- kib_conn_t *conn;
-
- LASSERT (peer->ibp_connecting != 0);
-
- conn = kibnal_create_conn(peer->ibp_nid, peer->ibp_version);
- if (conn == NULL) {
- CERROR ("Can't allocate conn\n");
- kibnal_peer_connect_failed(peer, IBNAL_CONN_ACTIVE, -ENOMEM);
- return;
- }
-
- conn->ibc_peer = peer;
- kibnal_peer_addref(peer);
-
- qry = &conn->ibc_cvars->cv_query;
- memset(qry, 0, sizeof(*qry));
-
- qry->OutputType = OutputTypeServiceRecord;
- qry->InputType = InputTypeServiceRecord;
-
- qry->InputValue.ServiceRecordValue.ComponentMask =
- KIBNAL_SERVICE_KEY_MASK;
- kibnal_set_service_keys(
- &qry->InputValue.ServiceRecordValue.ServiceRecord,
- peer->ibp_nid);
-
- /* kibnal_service_get_callback gets my conn ref */
- frc = iba_sd_query_port_fabric_info(kibnal_data.kib_sd,
- kibnal_data.kib_port_guid,
- qry,
- kibnal_service_get_callback,
- &kibnal_data.kib_sdretry,
- conn);
- if (frc == FPENDING)
- return;
-
- CERROR("Lookup %s failed: %d\n", libcfs_nid2str(peer->ibp_nid), frc);
- kibnal_connreq_done(conn, IBNAL_CONN_ACTIVE, -EHOSTUNREACH);
-}
-
-int
-kibnal_check_txs (kib_conn_t *conn, struct list_head *txs)
-{
- kib_tx_t *tx;
- struct list_head *ttmp;
- int timed_out = 0;
-
- spin_lock(&conn->ibc_lock);
-
- list_for_each (ttmp, txs) {
- tx = list_entry (ttmp, kib_tx_t, tx_list);
-
- if (txs == &conn->ibc_active_txs) {
- LASSERT (!tx->tx_queued);
- LASSERT (tx->tx_waiting || tx->tx_sending != 0);
- } else {
- LASSERT (tx->tx_queued);
- }
-
- if (time_after_eq (jiffies, tx->tx_deadline)) {
- timed_out = 1;
- break;
- }
- }
-
- spin_unlock(&conn->ibc_lock);
- return timed_out;
-}
-
-int
-kibnal_conn_timed_out (kib_conn_t *conn)
-{
- return kibnal_check_txs(conn, &conn->ibc_tx_queue) ||
- kibnal_check_txs(conn, &conn->ibc_tx_queue_rsrvd) ||
- kibnal_check_txs(conn, &conn->ibc_tx_queue_nocred) ||
- kibnal_check_txs(conn, &conn->ibc_active_txs);
-}
-
-void
-kibnal_check_peers (int idx)
-{
- rwlock_t *rwlock = &kibnal_data.kib_global_lock;
- struct list_head *peers = &kibnal_data.kib_peers[idx];
- struct list_head *ptmp;
- kib_peer_t *peer;
- kib_conn_t *conn;
- struct list_head *ctmp;
- unsigned long flags;
-
- again:
- /* NB. We expect to have a look at all the peers and not find any
- * rdmas to time out, so we just use a shared lock while we
- * take a look... */
- read_lock_irqsave(rwlock, flags);
-
- list_for_each (ptmp, peers) {
- peer = list_entry (ptmp, kib_peer_t, ibp_list);
-
- if (peer->ibp_passivewait) {
- LASSERT (list_empty(&peer->ibp_conns));
-
- if (!time_after_eq(jiffies,
- peer->ibp_passivewait_deadline))
- continue;
-
- kibnal_peer_addref(peer); /* ++ ref for me... */
- read_unlock_irqrestore(rwlock, flags);
-
- kibnal_peer_connect_failed(peer, IBNAL_CONN_WAITING,
- -ETIMEDOUT);
- kibnal_peer_decref(peer); /* ...until here */
-
- /* start again now I've dropped the lock */
- goto again;
- }
-
- list_for_each (ctmp, &peer->ibp_conns) {
- conn = list_entry (ctmp, kib_conn_t, ibc_list);
-
- LASSERT (conn->ibc_state == IBNAL_CONN_ESTABLISHED);
-
- /* In case we have enough credits to return via a
- * NOOP, but there were no non-blocking tx descs
- * free to do it last time... */
- kibnal_check_sends(conn);
-
- if (!kibnal_conn_timed_out(conn))
- continue;
-
- /* Handle timeout by closing the whole connection. We
- * can only be sure RDMA activity has ceased once the
- * QP has been modified. */
-
- kibnal_conn_addref(conn); /* 1 ref for me... */
-
- read_unlock_irqrestore(rwlock, flags);
-
- CERROR("Timed out RDMA with %s\n",
- libcfs_nid2str(peer->ibp_nid));
-
- kibnal_close_conn (conn, -ETIMEDOUT);
- kibnal_conn_decref(conn); /* ...until here */
-
- /* start again now I've dropped the lock */
- goto again;
- }
- }
-
- read_unlock_irqrestore(rwlock, flags);
-}
-
-void
-kibnal_disconnect_conn (kib_conn_t *conn)
-{
- FSTATUS frc;
-
- LASSERT (conn->ibc_state == IBNAL_CONN_DISCONNECTING);
-
- kibnal_conn_disconnected(conn);
-
- frc = iba_cm_disconnect(conn->ibc_cep, NULL, NULL);
- switch (frc) {
- case FSUCCESS:
- break;
-
- case FINSUFFICIENT_RESOURCES:
- CERROR("ENOMEM disconnecting %s\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid));
- /* This might cause the module to become unloadable since the
- * FCM_DISCONNECTED callback is still outstanding */
- break;
-
- default:
- CERROR("Unexpected error disconnecting %s: %d\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid), frc);
- LBUG();
- }
-
- kibnal_peer_notify(conn->ibc_peer);
-}
-
-int
-kibnal_connd (void *arg)
-{
- wait_queue_t wait;
- unsigned long flags;
- kib_conn_t *conn;
- kib_peer_t *peer;
- int timeout;
- int i;
- int did_something;
- int peer_index = 0;
- unsigned long deadline = jiffies;
-
- cfs_daemonize ("kibnal_connd");
- cfs_block_allsigs ();
-
- init_waitqueue_entry (&wait, current);
-
- spin_lock_irqsave(&kibnal_data.kib_connd_lock, flags);
-
- while (!kibnal_data.kib_shutdown) {
- did_something = 0;
-
- if (!list_empty (&kibnal_data.kib_connd_zombies)) {
- conn = list_entry (kibnal_data.kib_connd_zombies.next,
- kib_conn_t, ibc_list);
- list_del (&conn->ibc_list);
- spin_unlock_irqrestore (&kibnal_data.kib_connd_lock, flags);
- did_something = 1;
-
- kibnal_destroy_conn(conn);
-
- spin_lock_irqsave (&kibnal_data.kib_connd_lock, flags);
- }
-
- if (!list_empty (&kibnal_data.kib_connd_conns)) {
- conn = list_entry (kibnal_data.kib_connd_conns.next,
- kib_conn_t, ibc_list);
- list_del (&conn->ibc_list);
- spin_unlock_irqrestore (&kibnal_data.kib_connd_lock, flags);
- did_something = 1;
-
- kibnal_disconnect_conn(conn);
- kibnal_conn_decref(conn);
-
- spin_lock_irqsave (&kibnal_data.kib_connd_lock, flags);
- }
-
- if (!list_empty (&kibnal_data.kib_connd_peers)) {
- peer = list_entry (kibnal_data.kib_connd_peers.next,
- kib_peer_t, ibp_connd_list);
-
- list_del_init (&peer->ibp_connd_list);
- spin_unlock_irqrestore (&kibnal_data.kib_connd_lock, flags);
- did_something = 1;
-
- kibnal_connect_peer (peer);
- kibnal_peer_decref (peer);
-
- spin_lock_irqsave (&kibnal_data.kib_connd_lock, flags);
- }
-
- /* careful with the jiffy wrap... */
- while ((timeout = (int)(deadline - jiffies)) <= 0) {
- const int n = 4;
- const int p = 1;
- int chunk = kibnal_data.kib_peer_hash_size;
-
- spin_unlock_irqrestore (&kibnal_data.kib_connd_lock, flags);
-
- /* Time to check for RDMA timeouts on a few more
- * peers: I do checks every 'p' seconds on a
- * proportion of the peer table and I need to check
- * every connection 'n' times within a timeout
- * interval, to ensure I detect a timeout on any
- * connection within (n+1)/n times the timeout
- * interval. */
-
- if (*kibnal_tunables.kib_timeout > n * p)
- chunk = (chunk * n * p) /
- *kibnal_tunables.kib_timeout;
- if (chunk == 0)
- chunk = 1;
-
- for (i = 0; i < chunk; i++) {
- kibnal_check_peers (peer_index);
- peer_index = (peer_index + 1) %
- kibnal_data.kib_peer_hash_size;
- }
-
- deadline += p * HZ;
- spin_lock_irqsave (&kibnal_data.kib_connd_lock, flags);
- did_something = 1;
- }
-
- if (did_something)
- continue;
-
- spin_unlock_irqrestore (&kibnal_data.kib_connd_lock, flags);
-
- set_current_state (TASK_INTERRUPTIBLE);
- add_wait_queue (&kibnal_data.kib_connd_waitq, &wait);
-
- if (!kibnal_data.kib_shutdown &&
- list_empty (&kibnal_data.kib_connd_conns) &&
- list_empty (&kibnal_data.kib_connd_peers))
- schedule_timeout (timeout);
-
- set_current_state (TASK_RUNNING);
- remove_wait_queue (&kibnal_data.kib_connd_waitq, &wait);
-
- spin_lock_irqsave (&kibnal_data.kib_connd_lock, flags);
- }
-
- spin_unlock_irqrestore (&kibnal_data.kib_connd_lock, flags);
-
- kibnal_thread_fini ();
- return (0);
-}
-
-
-void
-kibnal_hca_async_callback (void *hca_arg, IB_EVENT_RECORD *ev)
-{
- /* XXX flesh out. this seems largely for async errors */
- CERROR("type: %d code: %u\n", ev->EventType, ev->EventCode);
-}
-
-void
-kibnal_hca_callback (void *hca_arg, void *cq_arg)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&kibnal_data.kib_sched_lock, flags);
- kibnal_data.kib_ready = 1;
- wake_up(&kibnal_data.kib_sched_waitq);
- spin_unlock_irqrestore(&kibnal_data.kib_sched_lock, flags);
-}
-
-int
-kibnal_scheduler(void *arg)
-{
- long id = (long)arg;
- wait_queue_t wait;
- char name[16];
- FSTATUS frc;
- FSTATUS frc2;
- IB_WORK_COMPLETION wc;
- kib_rx_t *rx;
- unsigned long flags;
- __u64 rxseq = 0;
- int busy_loops = 0;
-
- snprintf(name, sizeof(name), "kibnal_sd_%02ld", id);
- cfs_daemonize(name);
- cfs_block_allsigs();
-
- init_waitqueue_entry(&wait, current);
-
- spin_lock_irqsave(&kibnal_data.kib_sched_lock, flags);
-
- while (!kibnal_data.kib_shutdown) {
- if (busy_loops++ >= IBNAL_RESCHED) {
- spin_unlock_irqrestore(&kibnal_data.kib_sched_lock,
- flags);
-
- cfs_cond_resched();
- busy_loops = 0;
-
- spin_lock_irqsave(&kibnal_data.kib_sched_lock, flags);
- }
-
- if (kibnal_data.kib_ready &&
- !kibnal_data.kib_checking_cq) {
- /* take ownership of completion polling */
- kibnal_data.kib_checking_cq = 1;
- /* Assume I'll exhaust the CQ */
- kibnal_data.kib_ready = 0;
- spin_unlock_irqrestore(&kibnal_data.kib_sched_lock,
- flags);
-
- frc = iba_poll_cq(kibnal_data.kib_cq, &wc);
- if (frc == FNOT_DONE) {
- /* CQ empty */
- frc2 = iba_rearm_cq(kibnal_data.kib_cq,
- CQEventSelNextWC);
- LASSERT (frc2 == FSUCCESS);
- }
-
- if (frc == FSUCCESS &&
- kibnal_wreqid2type(wc.WorkReqId) == IBNAL_WID_RX) {
- rx = (kib_rx_t *)kibnal_wreqid2ptr(wc.WorkReqId);
-
- /* Grab the RX sequence number NOW before
- * anyone else can get an RX completion */
- rxseq = rx->rx_conn->ibc_rxseq++;
- }
-
- spin_lock_irqsave(&kibnal_data.kib_sched_lock, flags);
- /* give up ownership of completion polling */
- kibnal_data.kib_checking_cq = 0;
-
- if (frc == FNOT_DONE)
- continue;
-
- LASSERT (frc == FSUCCESS);
- /* Assume there's more: get another scheduler to check
- * while I handle this completion... */
-
- kibnal_data.kib_ready = 1;
- wake_up(&kibnal_data.kib_sched_waitq);
-
- spin_unlock_irqrestore(&kibnal_data.kib_sched_lock,
- flags);
-
- switch (kibnal_wreqid2type(wc.WorkReqId)) {
- case IBNAL_WID_RX:
- kibnal_rx_complete(&wc, rxseq);
- break;
-
- case IBNAL_WID_TX:
- kibnal_tx_complete(&wc);
- break;
-
- case IBNAL_WID_RDMA:
- /* We only get RDMA completion notification if
- * it fails. So we just ignore them completely
- * because...
- *
- * 1) If an RDMA fails, all subsequent work
- * items, including the final SEND will fail
- * too, so I'm still guaranteed to notice that
- * this connection is hosed.
- *
- * 2) It's positively dangerous to look inside
- * the tx descriptor obtained from an RDMA work
- * item. As soon as I drop the kib_sched_lock,
- * I give a scheduler on another CPU a chance
- * to get the final SEND completion, so the tx
- * descriptor can get freed as I inspect it. */
- CERROR ("RDMA failed: %d\n", wc.Status);
- break;
-
- default:
- LBUG();
- }
-
- spin_lock_irqsave(&kibnal_data.kib_sched_lock, flags);
- continue;
- }
-
- /* Nothing to do; sleep... */
-
- set_current_state(TASK_INTERRUPTIBLE);
- add_wait_queue_exclusive(&kibnal_data.kib_sched_waitq, &wait);
- spin_unlock_irqrestore(&kibnal_data.kib_sched_lock,
- flags);
-
- schedule();
-
- remove_wait_queue(&kibnal_data.kib_sched_waitq, &wait);
- set_current_state(TASK_RUNNING);
- spin_lock_irqsave(&kibnal_data.kib_sched_lock, flags);
- }
-
- spin_unlock_irqrestore(&kibnal_data.kib_sched_lock, flags);
-
- kibnal_thread_fini();
- return (0);
-}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff