2 * -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
3 * vim:expandtab:shiftwidth=8:tabstop=8:
7 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 only,
11 * as published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License version 2 for more details (a copy is included
17 * in the LICENSE file that accompanied this code).
19 * You should have received a copy of the GNU General Public License
20 * version 2 along with this program; If not, see [sun.com URL with a
23 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
24 * CA 95054 USA or visit www.sun.com if you need additional information or
30 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
31 * Use is subject to license terms.
33 * Copyright (c) 2003 Los Alamos National Laboratory (LANL)
36 * This file is part of Lustre, http://www.lustre.org/
37 * Lustre is a trademark of Sun Microsystems, Inc.
41 * Implements the API NAL functions
49 .lnd_startup = gmnal_startup,
50 .lnd_shutdown = gmnal_shutdown,
52 .lnd_send = gmnal_send,
53 .lnd_recv = gmnal_recv,
56 gmnal_ni_t *the_gmni = NULL;
59 gmnal_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg)
61 struct libcfs_ioctl_data *data = arg;
64 case IOC_LIBCFS_REGISTER_MYNID:
65 if (data->ioc_nid == ni->ni_nid)
68 LASSERT (LNET_NIDNET(data->ioc_nid) == LNET_NIDNET(ni->ni_nid));
70 CERROR("obsolete IOC_LIBCFS_REGISTER_MYNID for %s(%s)\n",
71 libcfs_nid2str(data->ioc_nid),
72 libcfs_nid2str(ni->ni_nid));
81 gmnal_set_local_nid (gmnal_ni_t *gmni)
83 lnet_ni_t *ni = gmni->gmni_ni;
86 gm_status_t gm_status;
88 /* Called before anything initialised: no need to lock */
89 gm_status = gm_get_node_id(gmni->gmni_port, &local_gmid);
90 if (gm_status != GM_SUCCESS)
93 CDEBUG(D_NET, "Local node id is [%u]\n", local_gmid);
95 gm_status = gm_node_id_to_global_id(gmni->gmni_port,
98 if (gm_status != GM_SUCCESS)
101 CDEBUG(D_NET, "Global node id is [%u]\n", global_gmid);
103 ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid), global_gmid);
108 gmnal_shutdown(lnet_ni_t *ni)
110 gmnal_ni_t *gmni = ni->ni_data;
112 CDEBUG(D_TRACE, "gmnal_api_shutdown: gmni [%p]\n", gmni);
114 LASSERT (gmni == the_gmni);
116 /* stop processing messages */
117 gmnal_stop_threads(gmni);
119 /* stop all network callbacks */
120 gm_close(gmni->gmni_port);
121 gmni->gmni_port = NULL;
125 gmnal_free_ltxbufs(gmni);
126 gmnal_free_txs(gmni);
127 gmnal_free_rxs(gmni);
129 LIBCFS_FREE(gmni, sizeof(*gmni));
136 gmnal_startup(lnet_ni_t *ni)
138 gmnal_ni_t *gmni = NULL;
139 gmnal_rx_t *rx = NULL;
140 gm_status_t gm_status;
143 LASSERT (ni->ni_lnd == &the_gmlnd);
145 ni->ni_maxtxcredits = *gmnal_tunables.gm_credits;
146 ni->ni_peertxcredits = *gmnal_tunables.gm_peer_credits;
148 if (the_gmni != NULL) {
149 CERROR("Only 1 instance supported\n");
153 LIBCFS_ALLOC(gmni, sizeof(*gmni));
155 CERROR("can't allocate gmni\n");
161 memset(gmni, 0, sizeof(*gmni));
163 spin_lock_init(&gmni->gmni_tx_lock);
164 spin_lock_init(&gmni->gmni_gm_lock);
165 INIT_LIST_HEAD(&gmni->gmni_idle_txs);
166 INIT_LIST_HEAD(&gmni->gmni_idle_ltxbs);
167 INIT_LIST_HEAD(&gmni->gmni_buf_txq);
168 INIT_LIST_HEAD(&gmni->gmni_cred_txq);
169 sema_init(&gmni->gmni_rx_mutex, 1);
173 * initialise the interface,
175 CDEBUG(D_NET, "Calling gm_init\n");
176 if (gm_init() != GM_SUCCESS) {
177 CERROR("call to gm_init failed\n");
181 CDEBUG(D_NET, "Calling gm_open with port [%d], version [%d]\n",
182 *gmnal_tunables.gm_port, GM_API_VERSION);
184 gm_status = gm_open(&gmni->gmni_port, 0, *gmnal_tunables.gm_port,
185 "gmnal", GM_API_VERSION);
187 if (gm_status != GM_SUCCESS) {
188 CERROR("Can't open GM port %d: %d (%s)\n",
189 *gmnal_tunables.gm_port, gm_status,
190 gmnal_gmstatus2str(gm_status));
194 CDEBUG(D_NET,"gm_open succeeded port[%p]\n",gmni->gmni_port);
196 if (!gmnal_set_local_nid(gmni))
199 CDEBUG(D_NET, "portals_nid is %s\n", libcfs_nid2str(ni->ni_nid));
201 gmni->gmni_large_msgsize =
202 offsetof(gmnal_msg_t, gmm_u.immediate.gmim_payload[LNET_MAX_PAYLOAD]);
203 gmni->gmni_large_gmsize =
204 gm_min_size_for_length(gmni->gmni_large_msgsize);
205 gmni->gmni_large_pages =
206 (gmni->gmni_large_msgsize + PAGE_SIZE - 1)/PAGE_SIZE;
208 gmni->gmni_small_msgsize = MIN(GM_MTU, PAGE_SIZE);
209 gmni->gmni_small_gmsize =
210 gm_min_size_for_length(gmni->gmni_small_msgsize);
212 gmni->gmni_netaddr_base = GMNAL_NETADDR_BASE;
213 gmni->gmni_netaddr_size = 0;
215 CDEBUG(D_NET, "Msg size %08x/%08x [%d/%d]\n",
216 gmni->gmni_large_msgsize, gmni->gmni_small_msgsize,
217 gmni->gmni_large_gmsize, gmni->gmni_small_gmsize);
219 if (gmnal_alloc_rxs(gmni) != 0) {
220 CERROR("Failed to allocate rx descriptors\n");
224 if (gmnal_alloc_txs(gmni) != 0) {
225 CERROR("Failed to allocate tx descriptors\n");
229 if (gmnal_alloc_ltxbufs(gmni) != 0) {
230 CERROR("Failed to allocate large tx buffers\n");
234 rc = gmnal_start_threads(gmni);
236 CERROR("Can't start threads: %d\n", rc);
240 /* Start listening */
241 for (rx = gmni->gmni_rxs; rx != NULL; rx = rx->rx_next)
242 gmnal_post_rx(gmni, rx);
246 CDEBUG(D_NET, "gmnal_init finished\n");
250 gm_close(gmni->gmni_port);
251 gmni->gmni_port = NULL;
257 /* safe to free descriptors after network has been shut down */
258 gmnal_free_ltxbufs(gmni);
259 gmnal_free_txs(gmni);
260 gmnal_free_rxs(gmni);
262 LIBCFS_FREE(gmni, sizeof(*gmni));
269 * Called when module loaded
273 lnet_register_lnd(&the_gmlnd);
278 * Called when module removed
282 lnet_unregister_lnd(&the_gmlnd);