1/*
2 * Copyright (c) 2006 Cisco Systems, Inc.  All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses.  You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 *     Redistribution and use in source and binary forms, with or
11 *     without modification, are permitted provided that the following
12 *     conditions are met:
13 *
14 *      - Redistributions of source code must retain the above
15 *        copyright notice, this list of conditions and the following
16 *        disclaimer.
17 *
18 *      - Redistributions in binary form must reproduce the above
19 *        copyright notice, this list of conditions and the following
20 *        disclaimer in the documentation and/or other materials
21 *        provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33#if HAVE_CONFIG_H
34#  include <config.h>
35#endif /* HAVE_CONFIG_H */
36
37#include <stdlib.h>
38
39#include "mthca.h"
40
41#if !(defined(HAVE_IBV_DONTFORK_RANGE) && defined(HAVE_IBV_DOFORK_RANGE))
42
43/*
44 * If libibverbs isn't exporting these functions, then there's no
45 * point in doing it here, because the rest of libibverbs isn't going
46 * to be fork-safe anyway.
47 */
48static int ibv_dontfork_range(void *base, size_t size)
49{
50	return 0;
51}
52
53static int ibv_dofork_range(void *base, size_t size)
54{
55	return 0;
56}
57
58#endif /* HAVE_IBV_DONTFORK_RANGE && HAVE_IBV_DOFORK_RANGE */
59
60int mthca_alloc_buf(struct mthca_buf *buf, size_t size, int page_size)
61{
62	int ret;
63
64	ret = posix_memalign(&buf->buf, page_size, align(size, page_size));
65	if (ret)
66		return ret;
67
68	ret = ibv_dontfork_range(buf->buf, size);
69	if (ret)
70		free(buf->buf);
71
72	if (!ret)
73		buf->length = size;
74
75	return ret;
76}
77
78void mthca_free_buf(struct mthca_buf *buf)
79{
80	ibv_dofork_range(buf->buf, buf->length);
81	free(buf->buf);
82}
83