-/* -*- 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/viblnd/viblnd_cb.c
- *
- * Author: Eric Barton <eric@bartonsoftware.com>
- * Author: Frank Zago <fzago@systemfabricworks.com>
- */
-
-#include "viblnd.h"
-
-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
- if (tx->tx_md.md_fmrcount == 0 ||
- (rc != 0 && tx->tx_md.md_active)) {
- vv_return_t vvrc;
-
- /* mapping must be active (it dropped fmrcount to 0) */
- LASSERT (tx->tx_md.md_active);
-
- vvrc = vv_unmap_fmr(kibnal_data.kib_hca,
- 1, &tx->tx_md.md_fmrhandle);
- LASSERT (vvrc == vv_return_ok);
-
- tx->tx_md.md_fmrcount = *kibnal_tunables.kib_fmr_remaps;
- }
- tx->tx_md.md_active = 0;
-#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);
- }
-}
-
-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);
- }
-}
-
-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;
- __u64 addr = (__u64)((unsigned long)((rx)->rx_msg));
- vv_return_t vvrc;
-
- 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 = (vv_scatgat_t) {
- .v_address = KIBNAL_ADDR2SG(addr),
- .l_key = rx->rx_lkey,
- .length = IBNAL_MSG_SIZE,
- };
-
- rx->rx_wrq = (vv_wr_t) {
- .wr_id = kibnal_ptr2wreqid(rx, IBNAL_WID_RX),
- .completion_notification = 1,
- .scatgat_list = &rx->rx_gl,
- .num_of_data_segments = 1,
- .wr_type = vv_wr_receive,
- };
-
- LASSERT (conn->ibc_state >= IBNAL_CONN_INIT);
- LASSERT (rx->rx_nob >= 0); /* not posted */
-
- CDEBUG(D_NET, "posting rx [%d %x "LPX64"]\n",
- rx->rx_wrq.scatgat_list->length,
- rx->rx_wrq.scatgat_list->l_key,
- KIBNAL_SG2ADDR(rx->rx_wrq.scatgat_list->v_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 */
-
- spin_lock(&conn->ibc_lock);
- /* Serialise vv_post_receive; it's not re-entrant on the same QP */
- vvrc = vv_post_receive(kibnal_data.kib_hca,
- conn->ibc_qp, &rx->rx_wrq);
-
- if (vvrc == vv_return_ok) {
- if (credit)
- conn->ibc_outstanding_credits++;
- if (rsrvd_credit)
- conn->ibc_reserved_credits++;
-
- spin_unlock(&conn->ibc_lock);
-
- if (credit || rsrvd_credit)
- kibnal_check_sends(conn);
-
- return 0;
- }
-
- spin_unlock(&conn->ibc_lock);
-
- CERROR ("post rx -> %s failed %d\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid), vvrc);
- rc = -EIO;
- kibnal_close_conn(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_ESTABLISHED);
- LASSERT (conn->ibc_comms_error == 0);
-
- 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 (kib_rx_t *rx, vv_comp_status_t vvrc, int nob, __u64 rxseq)
-{
- kib_msg_t *msg = rx->rx_msg;
- kib_conn_t *conn = rx->rx_conn;
- unsigned long flags;
- int rc;
-
- CDEBUG(D_NET, "rx %p conn %p\n", rx, conn);
- LASSERT (rx->rx_nob < 0); /* was posted */
- rx->rx_nob = 0; /* isn't now */
-
- if (conn->ibc_state > IBNAL_CONN_ESTABLISHED)
- goto ignore;
-
- if (vvrc != vv_comp_status_success) {
- CERROR("Rx from %s failed: %d\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid), vvrc);
- 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; /* Can trust 'nob' now */
-
- if (conn->ibc_peer->ibp_nid != msg->ibm_srcnid ||
- kibnal_data.kib_ni->ni_nid != msg->ibm_dstnid ||
- 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));
- 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:
- CDEBUG(D_NET, "rx %p conn %p\n", rx, conn);
- kibnal_close_conn(conn, -EIO);
- 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];
- vv_l_key_t l_key;
- vv_r_key_t r_key;
- __u64 addr;
- __u64 frag_addr;
- vv_mem_reg_h_t mem_h;
- vv_return_t vvrc;
-
- if (rd->rd_nfrag >= IBNAL_MAX_RDMA_FRAGS) {
- CERROR ("Too many RDMA fragments\n");
- return -EMSGSIZE;
- }
-
- /* Try to create an address that adaptor-tavor will munge into a valid
- * network address, given how it maps all phys mem into 1 region */
- addr = lnet_page2phys(page) + page_offset + PAGE_OFFSET;
-
- /* NB this relies entirely on there being a single region for the whole
- * of memory, since "high" memory will wrap in the (void *) cast! */
- vvrc = vv_get_gen_mr_attrib(kibnal_data.kib_hca,
- (void *)((unsigned long)addr),
- len, &mem_h, &l_key, &r_key);
- LASSERT (vvrc == vv_return_ok);
-
- if (active) {
- if (rd->rd_nfrag == 0) {
- rd->rd_key = l_key;
- } else if (l_key != rd->rd_key) {
- CERROR ("> 1 key for single RDMA desc\n");
- return -EINVAL;
- }
- frag_addr = addr;
- } else {
- if (rd->rd_nfrag == 0) {
- rd->rd_key = r_key;
- } else if (r_key != rd->rd_key) {
- CERROR ("> 1 key for single RDMA desc\n");
- return -EINVAL;
- }
-
- frag_addr = kibnal_addr2net(addr);
- }
-
- kibnal_rf_set(frag, frag_addr, len);
-
- CDEBUG(D_NET,"map frag [%d][%d %x %08x%08x] "LPX64"\n",
- rd->rd_nfrag, frag->rf_nob, rd->rd_key,
- frag->rf_addr_hi, frag->rf_addr_lo, frag_addr);
-
- rd->rd_nfrag++;
- return 0;
-}
-
-int
-kibnal_setup_rd_iov(kib_tx_t *tx, kib_rdma_desc_t *rd,
- vv_access_con_bit_mask_t access,
- unsigned int niov, struct iovec *iov, int offset, int nob)
-{
- /* active if I'm sending */
- int active = ((access & vv_acc_r_mem_write) == 0);
- 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,
- vv_access_con_bit_mask_t access,
- int nkiov, lnet_kiov_t *kiov, int offset, int nob)
-{
- /* active if I'm sending */
- int active = ((access & vv_acc_r_mem_write) == 0);
- 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)
-{
- vv_return_t vvrc;
- vv_fmr_map_t map_props;
-
- 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);
-
- memset(&map_props, 0, sizeof(map_props));
-
- map_props.start = (void *)page_offset;
- map_props.size = nob;
- map_props.page_array_len = npages;
- map_props.page_array = tx->tx_pages;
-
- vvrc = vv_map_fmr(kibnal_data.kib_hca, tx->tx_md.md_fmrhandle,
- &map_props, &tx->tx_md.md_lkey, &tx->tx_md.md_rkey);
- if (vvrc != vv_return_ok) {
- CERROR ("Can't map vaddr %p for %d in %d pages: %d\n",
- map_props.start, nob, npages, vvrc);
- return -EFAULT;
- }
-
- tx->tx_md.md_addr = (unsigned long)map_props.start;
- tx->tx_md.md_active = 1;
- tx->tx_md.md_fmrcount--;
-
- rd->rd_key = active ? tx->tx_md.md_lkey : tx->tx_md.md_rkey;
- rd->rd_nob = nob;
- rd->rd_addr = tx->tx_md.md_addr;
-
- /* Compensate for adaptor-tavor's munging of gatherlist addresses */
- if (active)
- rd->rd_addr += PAGE_OFFSET;
-
- return 0;
-}
-
-int
-kibnal_setup_rd_iov (kib_tx_t *tx, kib_rdma_desc_t *rd,
- vv_access_con_bit_mask_t access,
- unsigned int niov, struct iovec *iov, int offset, int nob)
-{
- /* active if I'm sending */
- int active = ((access & vv_acc_r_mem_write) == 0);
- 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,
- vv_access_con_bit_mask_t access,
- int nkiov, lnet_kiov_t *kiov, int offset, int nob)
-{
- /* active if I'm sending */
- int active = ((access & vv_acc_r_mem_write) == 0);
- 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;
- vv_return_t vvrc;
- int rc;
- int consume_cred;
- int done;
-
- /* Don't send anything until after the connection is established */
- if (conn->ibc_state < IBNAL_CONN_ESTABLISHED) {
- CDEBUG(D_NET, "%s too soon\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid));
- return;
- }
-
- 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);
-
- /* Keep holding ibc_lock while posting sends on this
- * connection; vv_post_send() isn't re-entrant on the same
- * QP!! */
-
- LASSERT (tx->tx_nwrq > 0);
-#if 0
- if (tx->tx_wrq[0].wr_type == vv_wr_rdma_write)
- CDEBUG(D_NET, "WORK[0]: RDMA gl %p for %d k %x -> "LPX64" k %x\n",
- tx->tx_wrq[0].scatgat_list->v_address,
- tx->tx_wrq[0].scatgat_list->length,
- tx->tx_wrq[0].scatgat_list->l_key,
- tx->tx_wrq[0].type.send.send_qp_type.rc_type.r_addr,
- tx->tx_wrq[0].type.send.send_qp_type.rc_type.r_r_key);
- else
- CDEBUG(D_NET, "WORK[0]: %s gl %p for %d k %x\n",
- tx->tx_wrq[0].wr_type == vv_wr_send ? "SEND" : "????",
- tx->tx_wrq[0].scatgat_list->v_address,
- tx->tx_wrq[0].scatgat_list->length,
- tx->tx_wrq[0].scatgat_list->l_key);
-
- if (tx->tx_nwrq > 1) {
- if (tx->tx_wrq[1].wr_type == vv_wr_rdma_write)
- CDEBUG(D_NET, "WORK[1]: RDMA gl %p for %d k %x -> "LPX64" k %x\n",
- tx->tx_wrq[1].scatgat_list->v_address,
- tx->tx_wrq[1].scatgat_list->length,
- tx->tx_wrq[1].scatgat_list->l_key,
- tx->tx_wrq[1].type.send.send_qp_type.rc_type.r_addr,
- tx->tx_wrq[1].type.send.send_qp_type.rc_type.r_r_key);
- else
- CDEBUG(D_NET, "WORK[1]: %s gl %p for %d k %x\n",
- tx->tx_wrq[1].wr_type == vv_wr_send ? "SEND" : "????",
- tx->tx_wrq[1].scatgat_list->v_address,
- tx->tx_wrq[1].scatgat_list->length,
- tx->tx_wrq[1].scatgat_list->l_key);
- }
-#endif
- rc = -ECONNABORTED;
- vvrc = vv_return_ok;
- if (conn->ibc_state == IBNAL_CONN_ESTABLISHED) {
- tx->tx_status = 0;
- vvrc = vv_post_send_list(kibnal_data.kib_hca,
- conn->ibc_qp,
- tx->tx_nwrq,
- tx->tx_wrq,
- vv_operation_type_send_rc);
- rc = (vvrc == vv_return_ok) ? 0 : -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",
- vvrc, 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 (kib_tx_t *tx, vv_comp_status_t vvrc)
-{
- kib_conn_t *conn = tx->tx_conn;
- int failed = (vvrc != vv_comp_status_success);
- int idle;
-
- CDEBUG(D_NET, "tx %p conn %p sending %d nwrq %d vvrc %d\n",
- tx, conn, tx->tx_sending, tx->tx_nwrq, vvrc);
-
- LASSERT (tx->tx_sending > 0);
-
- if (failed &&
- tx->tx_status == 0 &&
- conn->ibc_state == IBNAL_CONN_ESTABLISHED)
- CDEBUG(D_NETERROR, "tx -> %s type %x cookie "LPX64
- "sending %d waiting %d: failed %d\n",
- libcfs_nid2str(conn->ibc_peer->ibp_nid),
- tx->tx_msg->ibm_type, tx->tx_cookie,
- tx->tx_sending, tx->tx_waiting, vvrc);
-
- 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)
-{
- vv_scatgat_t *gl = &tx->tx_gl[tx->tx_nwrq];
- vv_wr_t *wrq = &tx->tx_wrq[tx->tx_nwrq];
- int nob = offsetof (kib_msg_t, ibm_u) + body_nob;
- __u64 addr = (__u64)((unsigned long)((tx)->tx_msg));
-
- 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 = (vv_scatgat_t) {
- .v_address = KIBNAL_ADDR2SG(addr),
- .l_key = tx->tx_lkey,
- .length = nob,
- };
-
- memset(wrq, 0, sizeof(*wrq));
-
- wrq->wr_id = kibnal_ptr2wreqid(tx, IBNAL_WID_TX);
- wrq->wr_type = vv_wr_send;
- wrq->scatgat_list = gl;
- wrq->num_of_data_segments = 1;
- wrq->completion_notification = 1;
- wrq->type.send.solicited_event = 1;
- wrq->type.send.immidiate_data_indicator = 0;
- wrq->type.send.send_qp_type.rc_type.fance_indicator = 0;
-
- 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;
- vv_scatgat_t *gl;
- vv_wr_t *wrq;
- int rc;
-
-#if IBNAL_USE_FMR
- LASSERT (tx->tx_nwrq == 0);
-
- gl = &tx->tx_gl[0];
- gl->length = nob;
- gl->v_address = KIBNAL_ADDR2SG(srcrd->rd_addr);
- gl->l_key = srcrd->rd_key;
-
- wrq = &tx->tx_wrq[0];
-
- wrq->wr_id = kibnal_ptr2wreqid(tx, IBNAL_WID_RDMA);
- wrq->completion_notification = 0;
- wrq->scatgat_list = gl;
- wrq->num_of_data_segments = 1;
- wrq->wr_type = vv_wr_rdma_write;
- wrq->type.send.solicited_event = 0;
- wrq->type.send.send_qp_type.rc_type.fance_indicator = 0;
- wrq->type.send.send_qp_type.rc_type.r_addr = dstrd->rd_addr;
- wrq->type.send.send_qp_type.rc_type.r_r_key = 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->v_address = KIBNAL_ADDR2SG(kibnal_rf_addr(srcfrag));
- gl->length = wrknob;
- gl->l_key = srcrd->rd_key;
-
- wrq = &tx->tx_wrq[tx->tx_nwrq];
-
- wrq->wr_id = kibnal_ptr2wreqid(tx, IBNAL_WID_RDMA);
- wrq->completion_notification = 0;
- wrq->scatgat_list = gl;
- wrq->num_of_data_segments = 1;
- wrq->wr_type = vv_wr_rdma_write;
- wrq->type.send.solicited_event = 0;
- wrq->type.send.send_qp_type.rc_type.fance_indicator = 0;
- wrq->type.send.send_qp_type.rc_type.r_addr = kibnal_rf_addr(dstfrag);
- wrq->type.send.send_qp_type.rc_type.r_r_key = dstrd->rd_key;
-
- resid -= wrknob;
- if (wrknob < srcfrag->rf_nob) {
- kibnal_rf_set(srcfrag,
- kibnal_rf_addr(srcfrag) + wrknob,
- srcfrag->rf_nob - wrknob);
- } else {
- srcfrag++;
- srcidx++;
- }
-
- if (wrknob < dstfrag->rf_nob) {
- kibnal_rf_set(dstfrag,
- kibnal_rf_addr(dstfrag) + 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_peer_arp (kib_peer_t *peer)
-{
- unsigned long flags;
-
- LASSERT (peer->ibp_connecting != 0);
- LASSERT (peer->ibp_arp_count > 0);
-
- kibnal_peer_addref(peer); /* extra ref for connd */
-
- spin_lock_irqsave(&kibnal_data.kib_connd_lock, flags);
-
- list_add_tail (&peer->ibp_connd_list, &kibnal_data.kib_connd_peers);
- wake_up (&kibnal_data.kib_connd_waitq);
-
- spin_unlock_irqrestore(&kibnal_data.kib_connd_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, LNET_NIDADDR(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 (peer->ibp_connecting == 0 &&
- peer->ibp_accepting == 0) {
- 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;
- }
-
- peer->ibp_connecting = 1;
- peer->ibp_arp_count = 1 + *kibnal_tunables.kib_arp_retries;
- kibnal_schedule_peer_arp(peer);
- }
-
- /* A connection is being established; queue the message... */
- list_add_tail (&tx->tx_list, &peer->ibp_tx_queue);
-
- write_unlock_irqrestore(g_lock, flags);
-}
-
-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,
- vv_acc_r_mem_write,
- 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,
- vv_acc_r_mem_write,
- 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, 0,
- payload_niov, payload_iov,
- payload_offset, payload_nob);
- else
- rc = kibnal_setup_rd_kiov(tx, tx->tx_rd, 0,
- 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, 0,
- niov, iov, offset, nob);
- else
- rc = kibnal_setup_rd_kiov(tx, tx->tx_rd, 0,
- 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(0x129, "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(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,
- vv_acc_r_mem_write,
- niov, iov, offset, mlen);
- else
- rc = kibnal_setup_rd_kiov(tx,
- &txmsg->ibm_u.putack.ibpam_rd,
- vv_acc_r_mem_write,
- 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(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(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. 'error' is zero for a
- * normal shutdown which can happen only after the connection has been
- * established. If the connection is established, schedule the
- * connection to be finished off by the connd. Otherwise the connd is
- * already dealing with it (either to set it up or tear it down).
- * Caller holds kib_global_lock exclusively in irq context */
- kib_peer_t *peer = conn->ibc_peer;
-
- LASSERT (error != 0 || conn->ibc_state >= IBNAL_CONN_ESTABLISHED);
-
- if (error != 0 && conn->ibc_comms_error == 0)
- conn->ibc_comms_error = error;
-
- 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);
- }
-
- 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);
-
- /* set/clear error on last conn */
- peer->ibp_error = conn->ibc_comms_error;
- }
-
- kibnal_set_conn_state(conn, IBNAL_CONN_DISCONNECT1);
-
- 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)
-{
- /* I'm the connd */
- LASSERT (!in_interrupt());
- LASSERT (current == kibnal_data.kib_connd);
- LASSERT (conn->ibc_state >= IBNAL_CONN_INIT);
-
- kibnal_set_conn_state(conn, IBNAL_CONN_DISCONNECTED);
-
- /* move QP to error state to make posted work items complete */
- kibnal_set_qp_state(conn, vv_qp_state_error);
-
- /* 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_nocred);
- kibnal_abort_txs(conn, &conn->ibc_active_txs);
-
- kibnal_handle_early_rxs(conn);
-
- kibnal_peer_notify(conn->ibc_peer);
-}
-
-void
-kibnal_peer_connect_failed (kib_peer_t *peer, int active, int error)
-{
- LIST_HEAD (zombies);
- unsigned long flags;
-
- /* Only the connd creates conns => single threaded */
- LASSERT (error != 0);
- LASSERT (!in_interrupt());
- LASSERT (current == kibnal_data.kib_connd);
-
- write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
-
- if (active) {
- LASSERT (peer->ibp_connecting != 0);
- peer->ibp_connecting--;
- } else {
- LASSERT (peer->ibp_accepting != 0);
- peer->ibp_accepting--;
- }
-
- if (peer->ibp_connecting != 0 ||
- peer->ibp_accepting != 0) {
- /* another connection attempt under way (loopback?)... */
- write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
- return;
- }
-
- if (list_empty(&peer->ibp_conns)) {
- /* 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;
- } else {
- /* Can't have blocked transmits if there are connections */
- LASSERT (list_empty(&peer->ibp_tx_queue));
- }
-
- 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_reject(cm_cep_handle_t cep, int why)
-{
- static cm_reject_data_t rejs[3];
- cm_reject_data_t *rej = &rejs[why];
-
- LASSERT (why >= 0 && why < sizeof(rejs)/sizeof(rejs[0]));
-
- /* If I wasn't so lazy, I'd initialise this only once; it's effective
- * read-only */
- rej->reason = cm_rej_code_usr_rej;
- rej->priv_data[0] = (IBNAL_MSG_MAGIC) & 0xff;
- rej->priv_data[1] = (IBNAL_MSG_MAGIC >> 8) & 0xff;
- rej->priv_data[2] = (IBNAL_MSG_MAGIC >> 16) & 0xff;
- rej->priv_data[3] = (IBNAL_MSG_MAGIC >> 24) & 0xff;
- rej->priv_data[4] = (IBNAL_MSG_VERSION) & 0xff;
- rej->priv_data[5] = (IBNAL_MSG_VERSION >> 8) & 0xff;
- rej->priv_data[6] = why;
-
- cm_reject(cep, rej);
-}
-
-void
-kibnal_connreq_done(kib_conn_t *conn, int active, int status)
-{
- struct list_head txs;
- kib_peer_t *peer = conn->ibc_peer;
- unsigned long flags;
- kib_tx_t *tx;
-
- CDEBUG(D_NET,"%d\n", status);
-
- /* Only the connd creates conns => single threaded */
- LASSERT (!in_interrupt());
- LASSERT (current == kibnal_data.kib_connd);
- LASSERT (conn->ibc_state < IBNAL_CONN_ESTABLISHED);
-
- if (active) {
- LASSERT (peer->ibp_connecting > 0);
- } else {
- LASSERT (peer->ibp_accepting > 0);
- }
-
- LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
- conn->ibc_connvars = NULL;
-
- if (status != 0) {
- /* failed to establish connection */
- switch (conn->ibc_state) {
- default:
- LBUG();
-
- case IBNAL_CONN_ACTIVE_CHECK_REPLY:
- /* got a connection reply but failed checks */
- LASSERT (active);
- kibnal_reject(conn->ibc_cep, IBNAL_REJECT_FATAL);
- break;
-
- case IBNAL_CONN_ACTIVE_CONNECT:
- LASSERT (active);
- cm_cancel(conn->ibc_cep);
- cfs_pause(cfs_time_seconds(1)/10);
- /* cm_connect() failed immediately or
- * callback returned failure */
- break;
-
- case IBNAL_CONN_ACTIVE_ARP:
- LASSERT (active);
- /* ibat_get_ib_data() failed immediately
- * or callback returned failure */
- break;
-
- case IBNAL_CONN_INIT:
- break;
-
- case IBNAL_CONN_PASSIVE_WAIT:
- LASSERT (!active);
- /* cm_accept callback returned failure */
- break;
- }
-
- kibnal_peer_connect_failed(peer, active, status);
- kibnal_conn_disconnected(conn);
- return;
- }
-
- /* connection established */
- write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
-
- if (active) {
- LASSERT(conn->ibc_state == IBNAL_CONN_ACTIVE_RTU);
- } else {
- LASSERT(conn->ibc_state == IBNAL_CONN_PASSIVE_WAIT);
- }
-
- conn->ibc_last_send = jiffies;
- kibnal_set_conn_state(conn, IBNAL_CONN_ESTABLISHED);
- kibnal_peer_alive(peer);
-
- /* Add conn to peer's list and nuke any dangling conns from a different
- * peer instance... */
- kibnal_conn_addref(conn); /* +1 ref for ibc_list */
- list_add(&conn->ibc_list, &peer->ibp_conns);
- kibnal_close_stale_conns_locked (peer, conn->ibc_incarnation);
-
- if (!kibnal_peer_active(peer) || /* peer has been deleted */
- conn->ibc_comms_error != 0 || /* comms error */
- conn->ibc_disconnect) { /* need to disconnect */
-
- /* start to shut down connection */
- kibnal_close_conn_locked(conn, -ECONNABORTED);
-
- write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
- kibnal_peer_connect_failed(peer, active, -ECONNABORTED);
- return;
- }
-
- if (active)
- peer->ibp_connecting--;
- else
- peer->ibp_accepting--;
-
- /* grab pending txs while I have the lock */
- list_add(&txs, &peer->ibp_tx_queue);
- list_del_init(&peer->ibp_tx_queue);
-
- peer->ibp_reconnect_interval = 0; /* OK to reconnect at any time */
-
- 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);
-
- /* schedule blocked rxs */
- kibnal_handle_early_rxs(conn);
-}
-
-void
-kibnal_cm_callback(cm_cep_handle_t cep, cm_conn_data_t *cmdata, void *arg)
-{
- static cm_dreply_data_t drep; /* just zeroed space */
-
- kib_conn_t *conn = (kib_conn_t *)arg;
- unsigned long flags;
-
- /* CAVEAT EMPTOR: tasklet context */
-
- switch (cmdata->status) {
- default:
- LBUG();
-
- case cm_event_disconn_request:
- /* IBNAL_CONN_ACTIVE_RTU: gets closed in kibnal_connreq_done
- * IBNAL_CONN_ESTABLISHED: I start it closing
- * otherwise: it's closing anyway */
- cm_disconnect(conn->ibc_cep, NULL, &drep);
- cm_cancel(conn->ibc_cep);
-
- write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
- LASSERT (!conn->ibc_disconnect);
- conn->ibc_disconnect = 1;
-
- switch (conn->ibc_state) {
- default:
- LBUG();
-
- case IBNAL_CONN_ACTIVE_RTU:
- /* kibnal_connreq_done is getting there; It'll see
- * ibc_disconnect set... */
- break;
-
- case IBNAL_CONN_ESTABLISHED:
- /* kibnal_connreq_done got there already; get
- * disconnect going... */
- kibnal_close_conn_locked(conn, 0);
- break;
-
- case IBNAL_CONN_DISCONNECT1:
- /* kibnal_disconnect_conn is getting there; It'll see
- * ibc_disconnect set... */
- break;
-
- case IBNAL_CONN_DISCONNECT2:
- /* kibnal_disconnect_conn got there already; complete
- * the disconnect. */
- kibnal_schedule_conn(conn);
- break;
- }
- write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
- break;
-
- case cm_event_disconn_timeout:
- case cm_event_disconn_reply:
- write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
- LASSERT (conn->ibc_state == IBNAL_CONN_DISCONNECT2);
- LASSERT (!conn->ibc_disconnect);
- conn->ibc_disconnect = 1;
-
- /* kibnal_disconnect_conn sent the disconnect request. */
- kibnal_schedule_conn(conn);
-
- write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
- break;
-
- case cm_event_connected:
- case cm_event_conn_timeout:
- case cm_event_conn_reject:
- LASSERT (conn->ibc_state == IBNAL_CONN_PASSIVE_WAIT);
- conn->ibc_connvars->cv_conndata = *cmdata;
-
- kibnal_schedule_conn(conn);
- break;
- }
-
- kibnal_conn_decref(conn); /* lose my ref */
-}
-
-void
-kibnal_check_passive_wait(kib_conn_t *conn)
-{
- int rc;
-
- switch (conn->ibc_connvars->cv_conndata.status) {
- default:
- LBUG();
-
- case cm_event_connected:
- kibnal_conn_addref(conn); /* ++ ref for CM callback */
- rc = kibnal_set_qp_state(conn, vv_qp_state_rts);
- if (rc != 0)
- conn->ibc_comms_error = rc;
- /* connection _has_ been established; it's just that we've had
- * an error immediately... */
- kibnal_connreq_done(conn, 0, 0);
- break;
-
- case cm_event_conn_timeout:
- kibnal_connreq_done(conn, 0, -ETIMEDOUT);
- break;
-
- case cm_event_conn_reject:
- kibnal_connreq_done(conn, 0, -ECONNRESET);
- break;
- }
-}
-
-void
-kibnal_recv_connreq(cm_cep_handle_t *cep, cm_request_data_t *cmreq)
-{
- static kib_msg_t txmsg;
- static kib_msg_t rxmsg;
- static cm_reply_data_t reply;
-
- kib_conn_t *conn = NULL;
- int rc = 0;
- int reason;
- int rxmsgnob;
- rwlock_t *g_lock = &kibnal_data.kib_global_lock;
- kib_peer_t *peer;
- kib_peer_t *peer2;
- unsigned long flags;
- kib_connvars_t *cv;
- cm_return_t cmrc;
- vv_return_t vvrc;
-
- /* I'm the connd executing in thread context
- * No concurrency problems with static data! */
- LASSERT (!in_interrupt());
- LASSERT (current == kibnal_data.kib_connd);
-
- if (cmreq->sid != (__u64)(*kibnal_tunables.kib_service_number)) {
- CERROR(LPX64" != IBNAL_SERVICE_NUMBER("LPX64")\n",
- cmreq->sid, (__u64)(*kibnal_tunables.kib_service_number));
- reason = IBNAL_REJECT_FATAL;
- goto reject;
- }
-
- /* copy into rxmsg to avoid alignment issues */
- rxmsgnob = MIN(cm_REQ_priv_data_len, sizeof(rxmsg));
- memcpy(&rxmsg, cmreq->priv_data, rxmsgnob);
-
- rc = kibnal_unpack_msg(&rxmsg, 0, rxmsgnob);
- if (rc != 0) {
- /* SILENT! kibnal_unpack_msg() complains if required */
- reason = IBNAL_REJECT_FATAL;
- goto reject;
- }
-
- if (rxmsg.ibm_version != IBNAL_MSG_VERSION)
- CWARN("Connection from %s: old protocol version 0x%x\n",
- libcfs_nid2str(rxmsg.ibm_srcnid), rxmsg.ibm_version);
-
- if (rxmsg.ibm_type != IBNAL_MSG_CONNREQ) {
- CERROR("Unexpected connreq msg type: %x from %s\n",
- rxmsg.ibm_type, libcfs_nid2str(rxmsg.ibm_srcnid));
- reason = IBNAL_REJECT_FATAL;
- goto reject;
- }
-
- if (kibnal_data.kib_ni->ni_nid != rxmsg.ibm_dstnid) {
- CERROR("Can't accept %s: bad dst nid %s\n",
- libcfs_nid2str(rxmsg.ibm_srcnid),
- libcfs_nid2str(rxmsg.ibm_dstnid));
- reason = IBNAL_REJECT_FATAL;
- goto reject;
- }
-
- if (rxmsg.ibm_u.connparams.ibcp_queue_depth != IBNAL_MSG_QUEUE_SIZE) {
- CERROR("Can't accept %s: incompatible queue depth %d (%d wanted)\n",
- libcfs_nid2str(rxmsg.ibm_srcnid),
- rxmsg.ibm_u.connparams.ibcp_queue_depth,
- IBNAL_MSG_QUEUE_SIZE);
- reason = IBNAL_REJECT_FATAL;
- goto reject;
- }
-
- if (rxmsg.ibm_u.connparams.ibcp_max_msg_size > IBNAL_MSG_SIZE) {
- CERROR("Can't accept %s: message size %d too big (%d max)\n",
- libcfs_nid2str(rxmsg.ibm_srcnid),
- rxmsg.ibm_u.connparams.ibcp_max_msg_size,
- IBNAL_MSG_SIZE);
- reason = IBNAL_REJECT_FATAL;
- goto reject;
- }
-
- if (rxmsg.ibm_u.connparams.ibcp_max_frags > IBNAL_MAX_RDMA_FRAGS) {
- CERROR("Can't accept %s: max frags %d too big (%d max)\n",
- libcfs_nid2str(rxmsg.ibm_srcnid),
- rxmsg.ibm_u.connparams.ibcp_max_frags,
- IBNAL_MAX_RDMA_FRAGS);
- reason = IBNAL_REJECT_FATAL;
- goto reject;
- }
-
- /* assume 'rxmsg.ibm_srcnid' is a new peer; create */
- rc = kibnal_create_peer (&peer, rxmsg.ibm_srcnid);
- if (rc != 0) {
- CERROR("Can't create peer for %s\n",
- libcfs_nid2str(rxmsg.ibm_srcnid));
- reason = IBNAL_REJECT_NO_RESOURCES;
- goto reject;
- }
-
- write_lock_irqsave(g_lock, flags);
-
- if (kibnal_data.kib_listen_handle == NULL) {
- write_unlock_irqrestore(g_lock, flags);
-
- CWARN ("Shutdown has started, rejecting connreq from %s\n",
- libcfs_nid2str(rxmsg.ibm_srcnid));
- kibnal_peer_decref(peer);
- reason = IBNAL_REJECT_FATAL;
- goto reject;
- }
-
- peer2 = kibnal_find_peer_locked(rxmsg.ibm_srcnid);
- if (peer2 != NULL) {
- /* tie-break connection race in favour of the higher NID */
- if (peer2->ibp_connecting != 0 &&
- rxmsg.ibm_srcnid < kibnal_data.kib_ni->ni_nid) {
- write_unlock_irqrestore(g_lock, flags);
-
- CWARN("Conn race %s\n",
- libcfs_nid2str(rxmsg.ibm_srcnid));
-
- kibnal_peer_decref(peer);
- reason = IBNAL_REJECT_CONN_RACE;
- goto reject;
- }
-
- peer2->ibp_accepting++;
- kibnal_peer_addref(peer2);
-
- write_unlock_irqrestore(g_lock, flags);
- kibnal_peer_decref(peer);
- peer = peer2;
- } else {
- /* Brand new peer */
- LASSERT (peer->ibp_accepting == 0);
- peer->ibp_accepting = 1;
-
- kibnal_peer_addref(peer);
- list_add_tail(&peer->ibp_list, kibnal_nid2peerlist(rxmsg.ibm_srcnid));
-
- write_unlock_irqrestore(g_lock, flags);
- }
-
- conn = kibnal_create_conn(cep);
- if (conn == NULL) {
- CERROR("Can't create conn for %s\n",
- libcfs_nid2str(rxmsg.ibm_srcnid));
- kibnal_peer_connect_failed(peer, 0, -ENOMEM);
- kibnal_peer_decref(peer);
- reason = IBNAL_REJECT_NO_RESOURCES;
- goto reject;
- }
-
- conn->ibc_version = rxmsg.ibm_version;
-
- conn->ibc_peer = peer; /* conn takes over my ref */
- conn->ibc_incarnation = rxmsg.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);
-
- cv = conn->ibc_connvars;
-
- cv->cv_txpsn = cmreq->cep_data.start_psn;
- cv->cv_remote_qpn = cmreq->cep_data.qpn;
- cv->cv_path = cmreq->path_data.path;
- cv->cv_rnr_count = cmreq->cep_data.rtr_retry_cnt;
- // XXX cmreq->cep_data.retry_cnt;
- cv->cv_port = cmreq->cep_data.local_port_num;
-
- vvrc = gid2gid_index(kibnal_data.kib_hca, cv->cv_port,
- &cv->cv_path.sgid, &cv->cv_sgid_index);
- if (vvrc != vv_return_ok) {
- CERROR("gid2gid_index failed for %s: %d\n",
- libcfs_nid2str(rxmsg.ibm_srcnid), vvrc);
- rc = -EIO;
- reason = IBNAL_REJECT_FATAL;
- goto reject;
- }
-
- vvrc = pkey2pkey_index(kibnal_data.kib_hca, cv->cv_port,
- cv->cv_path.pkey, &cv->cv_pkey_index);
- if (vvrc != vv_return_ok) {
- CERROR("pkey2pkey_index failed for %s: %d\n",
- libcfs_nid2str(rxmsg.ibm_srcnid), vvrc);
- rc = -EIO;
- reason = IBNAL_REJECT_FATAL;
- goto reject;
- }
-
- rc = kibnal_set_qp_state(conn, vv_qp_state_init);
- if (rc != 0) {
- reason = IBNAL_REJECT_FATAL;
- goto reject;
- }
-
- rc = kibnal_post_receives(conn);
- if (rc != 0) {
- CERROR("Can't post receives for %s\n",
- libcfs_nid2str(rxmsg.ibm_srcnid));
- reason = IBNAL_REJECT_FATAL;
- goto reject;
- }
-
- rc = kibnal_set_qp_state(conn, vv_qp_state_rtr);
- if (rc != 0) {
- reason = IBNAL_REJECT_FATAL;
- goto reject;
- }
-
- memset(&reply, 0, sizeof(reply));
- reply.qpn = cv->cv_local_qpn;
- reply.qkey = IBNAL_QKEY;
- reply.start_psn = cv->cv_rxpsn;
- reply.arb_initiator_depth = IBNAL_ARB_INITIATOR_DEPTH;
- reply.arb_resp_res = IBNAL_ARB_RESP_RES;
- reply.failover_accepted = IBNAL_FAILOVER_ACCEPTED;
- reply.rnr_retry_count = cv->cv_rnr_count;
- reply.targ_ack_delay = kibnal_data.kib_hca_attrs.ack_delay;
-
- /* setup txmsg... */
- memset(&txmsg, 0, sizeof(txmsg));
- kibnal_init_msg(&txmsg, IBNAL_MSG_CONNACK,
- sizeof(txmsg.ibm_u.connparams));
- LASSERT (txmsg.ibm_nob <= cm_REP_priv_data_len);
- txmsg.ibm_u.connparams.ibcp_queue_depth = IBNAL_MSG_QUEUE_SIZE;
- txmsg.ibm_u.connparams.ibcp_max_msg_size = IBNAL_MSG_SIZE;
- txmsg.ibm_u.connparams.ibcp_max_frags = IBNAL_MAX_RDMA_FRAGS;
- kibnal_pack_msg(&txmsg, conn->ibc_version,
- 0, rxmsg.ibm_srcnid, rxmsg.ibm_srcstamp, 0);
-
- /* ...and copy into reply to avoid alignment issues */
- memcpy(&reply.priv_data, &txmsg, txmsg.ibm_nob);
-
- kibnal_set_conn_state(conn, IBNAL_CONN_PASSIVE_WAIT);
-
- cmrc = cm_accept(conn->ibc_cep, &reply, NULL,
- kibnal_cm_callback, conn);
-
- if (cmrc == cm_stat_success)
- return; /* callback has got my ref on conn */
-
- /* back out state change (no callback happening) */
- kibnal_set_conn_state(conn, IBNAL_CONN_INIT);
- rc = -EIO;
- reason = IBNAL_REJECT_FATAL;
-
- reject:
- CDEBUG(D_NET, "Rejecting connreq from %s\n",
- libcfs_nid2str(rxmsg.ibm_srcnid));
-
- kibnal_reject(cep, reason);
-
- if (conn != NULL) {
- LASSERT (rc != 0);
- kibnal_connreq_done(conn, 0, rc);
- kibnal_conn_decref(conn);
- } else {
- cm_destroy_cep(cep);
- }
-}
-
-void
-kibnal_listen_callback(cm_cep_handle_t cep, cm_conn_data_t *data, void *arg)
-{
- cm_request_data_t *cmreq = &data->data.request;
- kib_pcreq_t *pcr;
- unsigned long flags;
-
- LASSERT (arg == NULL);
-
- if (data->status != cm_event_conn_request) {
- CERROR("status %d is not cm_event_conn_request\n",
- data->status);
- return;
- }
-
- LIBCFS_ALLOC_ATOMIC(pcr, sizeof(*pcr));
- if (pcr == NULL) {
- CERROR("Can't allocate passive connreq\n");
-
- kibnal_reject(cep, IBNAL_REJECT_NO_RESOURCES);
- cm_destroy_cep(cep);
- return;
- }
-
- pcr->pcr_cep = cep;
- pcr->pcr_cmreq = *cmreq;
-
- spin_lock_irqsave(&kibnal_data.kib_connd_lock, flags);
-
- list_add_tail(&pcr->pcr_list, &kibnal_data.kib_connd_pcreqs);
- wake_up(&kibnal_data.kib_connd_waitq);
-spin_unlock_irqrestore(&kibnal_data.kib_connd_lock, flags);
-}
-
-
-void
-kibnal_active_connect_callback (cm_cep_handle_t cep, cm_conn_data_t *cd,
- void *arg)
-{
- /* CAVEAT EMPTOR: tasklet context */
- kib_conn_t *conn = (kib_conn_t *)arg;
- kib_connvars_t *cv = conn->ibc_connvars;
-
- LASSERT (conn->ibc_state == IBNAL_CONN_ACTIVE_CONNECT);
- cv->cv_conndata = *cd;
-
- kibnal_schedule_conn(conn);
- kibnal_conn_decref(conn);
-}
-
-void
-kibnal_connect_conn (kib_conn_t *conn)
-{
- static cm_request_data_t cmreq;
- static kib_msg_t msg;
-
- kib_connvars_t *cv = conn->ibc_connvars;
- kib_peer_t *peer = conn->ibc_peer;
- cm_return_t cmrc;
-
- /* Only called by connd => statics OK */
- LASSERT (!in_interrupt());
- LASSERT (current == kibnal_data.kib_connd);
- LASSERT (conn->ibc_state == IBNAL_CONN_ACTIVE_ARP);
-
- memset(&cmreq, 0, sizeof(cmreq));
-
- cmreq.sid = (__u64)(*kibnal_tunables.kib_service_number);
-
- cmreq.cep_data.ca_guid = kibnal_data.kib_hca_attrs.guid;
- cmreq.cep_data.qpn = cv->cv_local_qpn;
- cmreq.cep_data.retry_cnt = *kibnal_tunables.kib_retry_cnt;
- cmreq.cep_data.rtr_retry_cnt = *kibnal_tunables.kib_rnr_cnt;
- cmreq.cep_data.start_psn = cv->cv_rxpsn;
- cmreq.cep_data.end_to_end_flow_ctrl = IBNAL_EE_FLOW_CNT;
- // XXX ack_timeout?
- // offered_resp_res
- // offered_initiator_depth
-
- cmreq.path_data.subn_local = IBNAL_LOCAL_SUB;
- cmreq.path_data.path = cv->cv_path;
-
- /* setup msg... */
- memset(&msg, 0, sizeof(msg));
- kibnal_init_msg(&msg, IBNAL_MSG_CONNREQ, sizeof(msg.ibm_u.connparams));
- LASSERT(msg.ibm_nob <= cm_REQ_priv_data_len);
- 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;
- kibnal_pack_msg(&msg, conn->ibc_version, 0, peer->ibp_nid, 0, 0);
-
- if (the_lnet.ln_testprotocompat != 0) {
- /* single-shot proto check */
- LNET_LOCK();
- if ((the_lnet.ln_testprotocompat & 1) != 0) {
- msg.ibm_version++;
- the_lnet.ln_testprotocompat &= ~1;
- }
- if ((the_lnet.ln_testprotocompat & 2) != 0) {
- msg.ibm_magic = LNET_PROTO_MAGIC;
- the_lnet.ln_testprotocompat &= ~2;
- }
- LNET_UNLOCK();
- }
-
- /* ...and copy into cmreq to avoid alignment issues */
- memcpy(&cmreq.priv_data, &msg, msg.ibm_nob);
-
- CDEBUG(D_NET, "Connecting %p to %s\n", conn,
- libcfs_nid2str(peer->ibp_nid));
-
- kibnal_conn_addref(conn); /* ++ref for CM callback */
- kibnal_set_conn_state(conn, IBNAL_CONN_ACTIVE_CONNECT);
-
- cmrc = cm_connect(conn->ibc_cep, &cmreq,
- kibnal_active_connect_callback, conn);
- if (cmrc == cm_stat_success) {
- CDEBUG(D_NET, "connection REQ sent to %s\n",
- libcfs_nid2str(peer->ibp_nid));
- return;
- }
-
- CERROR ("Connect %s failed: %d\n", libcfs_nid2str(peer->ibp_nid), cmrc);
- kibnal_conn_decref(conn); /* drop callback's ref */
- kibnal_connreq_done(conn, 1, -EHOSTUNREACH);
-}
-
-void
-kibnal_reconnect (kib_conn_t *conn, int why)
-{
- kib_peer_t *peer = conn->ibc_peer;
- int retry;
- unsigned long flags;
- cm_return_t cmrc;
- cm_cep_handle_t cep;
-
- LASSERT (conn->ibc_state == IBNAL_CONN_ACTIVE_CONNECT);
-
- read_lock_irqsave(&kibnal_data.kib_global_lock, flags);
-
- LASSERT (peer->ibp_connecting > 0); /* 'conn' at least */
-
- /* retry connection if it's still needed and no other connection
- * attempts (active or passive) are in progress.
- * Immediate reconnect is required, so I don't even look at the
- * reconnection timeout etc */
-
- retry = (!list_empty(&peer->ibp_tx_queue) &&
- peer->ibp_connecting == 1 &&
- peer->ibp_accepting == 0);
-
- read_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
-
- if (!retry) {
- kibnal_connreq_done(conn, 1, why);
- return;
- }
-
- cep = cm_create_cep(cm_cep_transp_rc);
- if (cep == NULL) {
- CERROR("Can't create new CEP\n");
- kibnal_connreq_done(conn, 1, -ENOMEM);
- return;
- }
-
- cmrc = cm_cancel(conn->ibc_cep);
- LASSERT (cmrc == cm_stat_success);
- cmrc = cm_destroy_cep(conn->ibc_cep);
- LASSERT (cmrc == cm_stat_success);
-
- conn->ibc_cep = cep;
-
- /* reuse conn; no need to peer->ibp_connecting++ */
- kibnal_set_conn_state(conn, IBNAL_CONN_ACTIVE_ARP);
- kibnal_connect_conn(conn);
-}
-
-void
-kibnal_check_connreply (kib_conn_t *conn)
-{
- static cm_rtu_data_t rtu;
- static kib_msg_t msg;
-
- kib_connvars_t *cv = conn->ibc_connvars;
- cm_reply_data_t *reply = &cv->cv_conndata.data.reply;
- kib_peer_t *peer = conn->ibc_peer;
- int msgnob;
- cm_return_t cmrc;
- unsigned long flags;
- int rc;
-
- /* Only called by connd => statics OK */
- LASSERT (!in_interrupt());
- LASSERT (current == kibnal_data.kib_connd);
- LASSERT (conn->ibc_state == IBNAL_CONN_ACTIVE_CONNECT);
-
- if (cv->cv_conndata.status == cm_event_conn_reply) {
- cv->cv_remote_qpn = reply->qpn;
- cv->cv_txpsn = reply->start_psn;
- // XXX reply->targ_ack_delay;
- cv->cv_rnr_count = reply->rnr_retry_count;
-
- kibnal_set_conn_state(conn, IBNAL_CONN_ACTIVE_CHECK_REPLY);
-
- /* copy into msg to avoid alignment issues */
- msgnob = MIN(cm_REP_priv_data_len, sizeof(msg));
- memcpy(&msg, &reply->priv_data, msgnob);
-
- rc = kibnal_unpack_msg(&msg, conn->ibc_version, msgnob);
- if (rc != 0) {
- CERROR("Can't unpack reply from %s\n",
- libcfs_nid2str(peer->ibp_nid));
- kibnal_connreq_done(conn, 1, rc);
- return;
- }
-
- if (msg.ibm_type != IBNAL_MSG_CONNACK ) {
- CERROR("Unexpected message type %d from %s\n",
- msg.ibm_type, libcfs_nid2str(peer->ibp_nid));
- kibnal_connreq_done(conn, 1, -EPROTO);
- return;
- }
-
- if (msg.ibm_u.connparams.ibcp_queue_depth != IBNAL_MSG_QUEUE_SIZE) {
- CERROR("%s has incompatible queue depth %d(%d wanted)\n",
- libcfs_nid2str(peer->ibp_nid),
- msg.ibm_u.connparams.ibcp_queue_depth,
- IBNAL_MSG_QUEUE_SIZE);
- kibnal_connreq_done(conn, 1, -EPROTO);
- return;
- }
-
- if (msg.ibm_u.connparams.ibcp_max_msg_size > IBNAL_MSG_SIZE) {
- CERROR("%s max message size %d too big (%d max)\n",
- libcfs_nid2str(peer->ibp_nid),
- msg.ibm_u.connparams.ibcp_max_msg_size,
- IBNAL_MSG_SIZE);
- kibnal_connreq_done(conn, 1, -EPROTO);
- return;
- }
-
- if (msg.ibm_u.connparams.ibcp_max_frags > IBNAL_MAX_RDMA_FRAGS) {
- CERROR("%s max frags %d too big (%d max)\n",
- libcfs_nid2str(peer->ibp_nid),
- msg.ibm_u.connparams.ibcp_max_frags,
- IBNAL_MAX_RDMA_FRAGS);
- kibnal_connreq_done(conn, 1, -EPROTO);
- return;
- }
-
- read_lock_irqsave(&kibnal_data.kib_global_lock, flags);
- if (kibnal_data.kib_ni->ni_nid == msg.ibm_dstnid &&
- msg.ibm_dststamp == kibnal_data.kib_incarnation)
- rc = 0;
- else
- rc = -ESTALE;
- read_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
- if (rc != 0) {
- CERROR("Stale connection reply from %s\n",
- libcfs_nid2str(peer->ibp_nid));
- kibnal_connreq_done(conn, 1, rc);
- return;
- }
-
- 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_post_receives(conn);
- if (rc != 0) {
- CERROR("Can't post receives for %s\n",
- libcfs_nid2str(peer->ibp_nid));
- kibnal_connreq_done(conn, 1, rc);
- return;
- }
-
- rc = kibnal_set_qp_state(conn, vv_qp_state_rtr);
- if (rc != 0) {
- kibnal_connreq_done(conn, 1, rc);
- return;
- }
-
- rc = kibnal_set_qp_state(conn, vv_qp_state_rts);
- if (rc != 0) {
- kibnal_connreq_done(conn, 1, rc);
- return;
- }
-
- kibnal_set_conn_state(conn, IBNAL_CONN_ACTIVE_RTU);
- kibnal_conn_addref(conn); /* ++for CM callback */
-
- memset(&rtu, 0, sizeof(rtu));
- cmrc = cm_accept(conn->ibc_cep, NULL, &rtu,
- kibnal_cm_callback, conn);
- if (cmrc == cm_stat_success) {
- /* Now I'm racing with disconnect signalled by
- * kibnal_cm_callback */
- kibnal_connreq_done(conn, 1, 0);
- return;
- }
-
- CERROR("cm_accept %s failed: %d\n",
- libcfs_nid2str(peer->ibp_nid), cmrc);
- /* Back out of RTU: no callback coming */
- kibnal_set_conn_state(conn, IBNAL_CONN_ACTIVE_CHECK_REPLY);
- kibnal_conn_decref(conn);
- kibnal_connreq_done(conn, 1, -EIO);
- return;
- }
-
- if (cv->cv_conndata.status == cm_event_conn_reject) {
-
- if (cv->cv_conndata.data.reject.reason == cm_rej_code_usr_rej) {
- unsigned char *bytes =
- cv->cv_conndata.data.reject.priv_data;
- int magic = (bytes[0]) |
- (bytes[1] << 8) |
- (bytes[2] << 16) |
- (bytes[3] << 24);
- int version = (bytes[4]) |
- (bytes[5] << 8);
- int why = (bytes[6]);
-
- /* Expected proto/version: she just doesn't like me (or
- * ran out of resources) */
- if (magic == IBNAL_MSG_MAGIC &&
- version == conn->ibc_version) {
- CERROR("conn -> %s rejected: fatal error %d\n",
- libcfs_nid2str(peer->ibp_nid), why);
-
- if (why == IBNAL_REJECT_CONN_RACE)
- kibnal_reconnect(conn, -EALREADY);
- else
- kibnal_connreq_done(conn, 1, -ECONNREFUSED);
- return;
- }
-
- /* Fail unless it's worth retrying with an old proto
- * version */
- if (!(magic == IBNAL_MSG_MAGIC &&
- version == IBNAL_MSG_VERSION_RDMAREPLYNOTRSRVD &&
- conn->ibc_version == IBNAL_MSG_VERSION)) {
- CERROR("conn -> %s rejected: bad protocol "
- "magic/ver %08x/%x why %d\n",
- libcfs_nid2str(peer->ibp_nid),
- magic, version, why);
-
- kibnal_connreq_done(conn, 1, -ECONNREFUSED);
- return;
- }
-
- conn->ibc_version = version;
- CWARN ("Connection to %s refused: "
- "retrying with old protocol version 0x%x\n",
- libcfs_nid2str(peer->ibp_nid), version);
-
- kibnal_reconnect(conn, -ECONNREFUSED);
- return;
- } else if (cv->cv_conndata.data.reject.reason ==
- cm_rej_code_stale_conn) {
-
- CWARN ("conn -> %s stale: retrying\n",
- libcfs_nid2str(peer->ibp_nid));
-
- kibnal_reconnect(conn, -ESTALE);
- return;
- } else {
- CDEBUG(D_NETERROR, "conn -> %s rejected: reason %d\n",
- libcfs_nid2str(peer->ibp_nid),
- cv->cv_conndata.data.reject.reason);
- kibnal_connreq_done(conn, 1, -ECONNREFUSED);
- return;
- }
- /* NOT REACHED */
- }
-
- CDEBUG(D_NETERROR, "conn -> %s failed: %d\n",
- libcfs_nid2str(peer->ibp_nid), cv->cv_conndata.status);
- kibnal_connreq_done(conn, 1, -ECONNABORTED);
-}
-
-void
-kibnal_arp_done (kib_conn_t *conn)
-{
- kib_peer_t *peer = conn->ibc_peer;
- kib_connvars_t *cv = conn->ibc_connvars;
- ibat_arp_data_t *arp = &cv->cv_arp;
- ib_path_record_v2_t *path = &cv->cv_path;
- vv_return_t vvrc;
- int rc;
- unsigned long flags;
-
- LASSERT (!in_interrupt());
- LASSERT (current == kibnal_data.kib_connd);
- LASSERT (conn->ibc_state == IBNAL_CONN_ACTIVE_ARP);
- LASSERT (peer->ibp_arp_count > 0);
-
- if (cv->cv_arprc != ibat_stat_ok) {
- CDEBUG(D_NETERROR, "Arp %s @ %u.%u.%u.%u failed: %d\n",
- libcfs_nid2str(peer->ibp_nid), HIPQUAD(peer->ibp_ip),
- cv->cv_arprc);
- goto failed;
- }
-
- if ((arp->mask & IBAT_PRI_PATH_VALID) != 0) {
- CDEBUG(D_NET, "Got valid path for %s\n",
- libcfs_nid2str(peer->ibp_nid));
-
- *path = *arp->primary_path;
-
- vvrc = base_gid2port_num(kibnal_data.kib_hca, &path->sgid,
- &cv->cv_port);
- if (vvrc != vv_return_ok) {
- CWARN("base_gid2port_num failed for %s @ %u.%u.%u.%u: %d\n",
- libcfs_nid2str(peer->ibp_nid),
- HIPQUAD(peer->ibp_ip), vvrc);
- goto failed;
- }
-
- vvrc = gid2gid_index(kibnal_data.kib_hca, cv->cv_port,
- &path->sgid, &cv->cv_sgid_index);
- if (vvrc != vv_return_ok) {
- CWARN("gid2gid_index failed for %s @ %u.%u.%u.%u: %d\n",
- libcfs_nid2str(peer->ibp_nid),
- HIPQUAD(peer->ibp_ip), vvrc);
- goto failed;
- }
-
- vvrc = pkey2pkey_index(kibnal_data.kib_hca, cv->cv_port,
- path->pkey, &cv->cv_pkey_index);
- if (vvrc != vv_return_ok) {
- CWARN("pkey2pkey_index failed for %s @ %u.%u.%u.%u: %d\n",
- libcfs_nid2str(peer->ibp_nid),
- HIPQUAD(peer->ibp_ip), vvrc);
- goto failed;
- }
-
- path->mtu = IBNAL_IB_MTU;
-
- } else if ((arp->mask & IBAT_LID_VALID) != 0) {
- CWARN("Creating new path record for %s @ %u.%u.%u.%u\n",
- libcfs_nid2str(peer->ibp_nid), HIPQUAD(peer->ibp_ip));
-
- cv->cv_pkey_index = IBNAL_PKEY_IDX;
- cv->cv_sgid_index = IBNAL_SGID_IDX;
- cv->cv_port = arp->local_port_num;
-
- memset(path, 0, sizeof(*path));
-
- vvrc = port_num2base_gid(kibnal_data.kib_hca, cv->cv_port,
- &path->sgid);
- if (vvrc != vv_return_ok) {
- CWARN("port_num2base_gid failed for %s @ %u.%u.%u.%u: %d\n",
- libcfs_nid2str(peer->ibp_ip),
- HIPQUAD(peer->ibp_ip), vvrc);
- goto failed;
- }
-
- vvrc = port_num2base_lid(kibnal_data.kib_hca, cv->cv_port,
- &path->slid);
- if (vvrc != vv_return_ok) {
- CWARN("port_num2base_lid failed for %s @ %u.%u.%u.%u: %d\n",
- libcfs_nid2str(peer->ibp_ip),
- HIPQUAD(peer->ibp_ip), vvrc);
- goto failed;
- }
-
- path->dgid = arp->gid;
- path->sl = IBNAL_SERVICE_LEVEL;
- path->dlid = arp->lid;
- path->mtu = IBNAL_IB_MTU;
- path->rate = IBNAL_STATIC_RATE;
- path->pkt_life_time = IBNAL_PKT_LIFETIME;
- path->pkey = IBNAL_PKEY;
- path->traffic_class = IBNAL_TRAFFIC_CLASS;
- } else {
- CWARN("Arp for %s @ %u.%u.%u.%u returned neither PATH nor LID\n",
- libcfs_nid2str(peer->ibp_nid), HIPQUAD(peer->ibp_ip));
- goto failed;
- }
-
- rc = kibnal_set_qp_state(conn, vv_qp_state_init);
- if (rc != 0) {
- kibnal_connreq_done(conn, 1, rc);
- }
-
- /* do the actual connection request */
- kibnal_connect_conn(conn);
- return;
-
- failed:
- write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
- peer->ibp_arp_count--;
- if (peer->ibp_arp_count == 0) {
- /* final ARP attempt failed */
- write_unlock_irqrestore(&kibnal_data.kib_global_lock,
- flags);
- CDEBUG(D_NETERROR, "Arp %s @ %u.%u.%u.%u failed (final attempt)\n",
- libcfs_nid2str(peer->ibp_nid), HIPQUAD(peer->ibp_ip));
- } else {
- /* Retry ARP: ibp_connecting++ so terminating conn
- * doesn't end peer's connection attempt */
- peer->ibp_connecting++;
- write_unlock_irqrestore(&kibnal_data.kib_global_lock,
- flags);
- CDEBUG(D_NETERROR, "Arp %s @ %u.%u.%u.%u failed (%d attempts left)\n",
- libcfs_nid2str(peer->ibp_nid), HIPQUAD(peer->ibp_ip),
- peer->ibp_arp_count);
-
- kibnal_schedule_peer_arp(peer);
- }
- kibnal_connreq_done(conn, 1, -ENETUNREACH);
-}
-
-void
-kibnal_arp_callback (ibat_stat_t arprc, ibat_arp_data_t *arp_data, void *arg)
-{
- /* CAVEAT EMPTOR: tasklet context */
- kib_peer_t *peer;
- kib_conn_t *conn = (kib_conn_t *)arg;
-
- LASSERT (conn != NULL);
- LASSERT (conn->ibc_state == IBNAL_CONN_ACTIVE_ARP);
-
- peer = conn->ibc_peer;
-
- if (arprc != ibat_stat_ok)
- CDEBUG(D_NETERROR, "Arp %s at %u.%u.%u.%u failed: %d\n",
- libcfs_nid2str(peer->ibp_nid), HIPQUAD(peer->ibp_ip), arprc);
- else
- CDEBUG(D_NET, "Arp %s at %u.%u.%u.%u OK: LID %s PATH %s\n",
- libcfs_nid2str(peer->ibp_nid), HIPQUAD(peer->ibp_ip),
- (arp_data->mask & IBAT_LID_VALID) == 0 ? "invalid" : "valid",
- (arp_data->mask & IBAT_PRI_PATH_VALID) == 0 ? "invalid" : "valid");
-
- conn->ibc_connvars->cv_arprc = arprc;
- if (arprc == ibat_stat_ok)
- conn->ibc_connvars->cv_arp = *arp_data;
-
- kibnal_schedule_conn(conn);
- kibnal_conn_decref(conn);
-}
-
-void
-kibnal_arp_peer (kib_peer_t *peer)
-{
- cm_cep_handle_t cep;
- kib_conn_t *conn;
- int ibatrc;
-
- /* Only the connd does this (i.e. single threaded) */
- LASSERT (current == kibnal_data.kib_connd);
- LASSERT (peer->ibp_connecting != 0);
- LASSERT (peer->ibp_arp_count > 0);
-
- cep = cm_create_cep(cm_cep_transp_rc);
- if (cep == NULL) {
- CERROR ("Can't create cep for conn->%s\n",
- libcfs_nid2str(peer->ibp_nid));
- kibnal_peer_connect_failed(peer, 1, -ENOMEM);
- return;
- }
-
- conn = kibnal_create_conn(cep);
- if (conn == NULL) {
- CERROR ("Can't allocate conn->%s\n",
- libcfs_nid2str(peer->ibp_nid));
- cm_destroy_cep(cep);
- kibnal_peer_connect_failed(peer, 1, -ENOMEM);
- return;
- }
-
- conn->ibc_peer = peer;
- kibnal_peer_addref(peer);
-
- kibnal_set_conn_state(conn, IBNAL_CONN_ACTIVE_ARP);
-
- ibatrc = ibat_get_ib_data(htonl(peer->ibp_ip), INADDR_ANY,
- ibat_paths_primary,
- &conn->ibc_connvars->cv_arp,
- kibnal_arp_callback, conn, 0);
- CDEBUG(D_NET,"ibatrc %d\n", ibatrc);
- switch (ibatrc) {
- default:
- LBUG();
-
- case ibat_stat_pending:
- /* NB callback has my ref on conn */
- break;
-
- case ibat_stat_ok:
- case ibat_stat_error:
- case ibat_stat_timeout:
- case ibat_stat_not_found:
- /* Immediate return (ARP cache hit or failure) == no callback.
- * Do the next stage directly... */
- conn->ibc_connvars->cv_arprc = ibatrc;
- kibnal_arp_done(conn);
- kibnal_conn_decref(conn);
- break;
- }
-}
-
-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_conns (int idx)
-{
- 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(&kibnal_data.kib_global_lock, flags);
-
- list_for_each (ptmp, peers) {
- peer = list_entry (ptmp, kib_peer_t, ibp_list);
-
- 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(&kibnal_data.kib_global_lock,
- 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(&kibnal_data.kib_global_lock, flags);
-}
-
-void
-kibnal_disconnect_conn (kib_conn_t *conn)
-{
- static cm_drequest_data_t dreq; /* just for the space */
-
- cm_return_t cmrc;
- unsigned long flags;
-
- LASSERT (!in_interrupt());
- LASSERT (current == kibnal_data.kib_connd);
-
- write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
-
- if (conn->ibc_disconnect) {
- /* Had the CM callback already */
- write_unlock_irqrestore(&kibnal_data.kib_global_lock,
- flags);
- kibnal_conn_disconnected(conn);
- return;
- }
-
- LASSERT (conn->ibc_state == IBNAL_CONN_DISCONNECT1);
-
- /* active disconnect */
- cmrc = cm_disconnect(conn->ibc_cep, &dreq, NULL);
- if (cmrc == cm_stat_success) {
- /* waiting for CM */
- conn->ibc_state = IBNAL_CONN_DISCONNECT2;
- write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
- return;
- }
-
- write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
-
- cm_cancel(conn->ibc_cep);
- cfs_pause(cfs_time_seconds(1)/10);
-
- if (!conn->ibc_disconnect) /* CM callback will never happen now */
- kibnal_conn_decref(conn);
-
- LASSERT (atomic_read(&conn->ibc_refcount) > 0);
- LASSERT (conn->ibc_state == IBNAL_CONN_DISCONNECT1);
-
- kibnal_conn_disconnected(conn);
-}
-
-int
-kibnal_connd (void *arg)
-{
- wait_queue_t wait;
- unsigned long flags;
- kib_pcreq_t *pcr;
- kib_conn_t *conn;
- kib_peer_t *peer;
- int timeout;
- int i;
- int dropped_lock;
- int peer_index = 0;
- unsigned long deadline = jiffies;
-
- cfs_daemonize ("kibnal_connd");
- cfs_block_allsigs ();
-
- init_waitqueue_entry (&wait, current);
- kibnal_data.kib_connd = current;
-
- spin_lock_irqsave(&kibnal_data.kib_connd_lock, flags);
-
- while (!kibnal_data.kib_shutdown) {
-
- dropped_lock = 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);
- dropped_lock = 1;
-
- kibnal_destroy_conn(conn);
-
- spin_lock_irqsave (&kibnal_data.kib_connd_lock, flags);
- }
-
- if (!list_empty (&kibnal_data.kib_connd_pcreqs)) {
- pcr = list_entry(kibnal_data.kib_connd_pcreqs.next,
- kib_pcreq_t, pcr_list);
- list_del(&pcr->pcr_list);
-
- spin_unlock_irqrestore(&kibnal_data.kib_connd_lock, flags);
- dropped_lock = 1;
-
- kibnal_recv_connreq(pcr->pcr_cep, &pcr->pcr_cmreq);
- LIBCFS_FREE(pcr, sizeof(*pcr));
-
- 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);
- dropped_lock = 1;
-
- kibnal_arp_peer (peer);
- kibnal_peer_decref (peer);
-
- 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);
- dropped_lock = 1;
-
- switch (conn->ibc_state) {
- default:
- LBUG();
-
- case IBNAL_CONN_ACTIVE_ARP:
- kibnal_arp_done(conn);
- break;
-
- case IBNAL_CONN_ACTIVE_CONNECT:
- kibnal_check_connreply(conn);
- break;
-
- case IBNAL_CONN_PASSIVE_WAIT:
- kibnal_check_passive_wait(conn);
- break;
-
- case IBNAL_CONN_DISCONNECT1:
- case IBNAL_CONN_DISCONNECT2:
- kibnal_disconnect_conn(conn);
- break;
- }
- kibnal_conn_decref(conn);
-
- spin_lock_irqsave (&kibnal_data.kib_connd_lock, flags);
- }
-
- /* careful with the jiffy wrap... */
- timeout = (int)(deadline - jiffies);
- if (timeout <= 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);
- dropped_lock = 1;
-
- /* 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_conns (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);
- }
-
- if (dropped_lock)
- continue;
-
- /* Nothing to do for 'timeout' */
- set_current_state (TASK_INTERRUPTIBLE);
- add_wait_queue (&kibnal_data.kib_connd_waitq, &wait);
- spin_unlock_irqrestore (&kibnal_data.kib_connd_lock, flags);
-
- 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_async_callback(vv_event_record_t ev)
-{
- CERROR("type: %d, port: %d, data: "LPX64"\n",
- ev.event_type, ev.port_num, ev.type.data);
-}
-
-void
-kibnal_cq_callback (unsigned long unused_context)
-{
- 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];
- vv_wc_t wc;
- vv_return_t vvrc;
- vv_return_t vvrc2;
- unsigned long flags;
- kib_rx_t *rx;
- __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);
-
- vvrc = vv_poll_for_completion(kibnal_data.kib_hca,
- kibnal_data.kib_cq, &wc);
- if (vvrc == vv_return_err_cq_empty) {
- vvrc2 = vv_request_completion_notification(
- kibnal_data.kib_hca,
- kibnal_data.kib_cq,
- vv_next_solicit_unsolicit_event);
- LASSERT (vvrc2 == vv_return_ok);
- }
-
- if (vvrc == vv_return_ok &&
- kibnal_wreqid2type(wc.wr_id) == IBNAL_WID_RX) {
- rx = (kib_rx_t *)kibnal_wreqid2ptr(wc.wr_id);
-
- /* 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 (vvrc == vv_return_err_cq_empty)
- continue;
-
- LASSERT (vvrc == vv_return_ok);
- /* 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.wr_id)) {
- case IBNAL_WID_RX:
- kibnal_rx_complete(
- (kib_rx_t *)kibnal_wreqid2ptr(wc.wr_id),
- wc.completion_status,
- wc.num_bytes_transfered,
- rxseq);
- break;
-
- case IBNAL_WID_TX:
- kibnal_tx_complete(
- (kib_tx_t *)kibnal_wreqid2ptr(wc.wr_id),
- wc.completion_status);
- 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. */
- CDEBUG(D_NETERROR, "RDMA failed: %d\n",
- wc.completion_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 / commitdiff