2 * Copyright (c) 2006, 2007 Cisco, Inc. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
35 #endif /* HAVE_CONFIG_H */
43 #if !(defined(HAVE_IBV_DONTFORK_RANGE) && defined(HAVE_IBV_DOFORK_RANGE))
46 * If libibverbs isn't exporting these functions, then there's no
47 * point in doing it here, because the rest of libibverbs isn't going
48 * to be fork-safe anyway.
50 static int ibv_dontfork_range(void *base, size_t size)
55 static int ibv_dofork_range(void *base, size_t size)
60 #endif /* HAVE_IBV_DONTFORK_RANGE && HAVE_IBV_DOFORK_RANGE */
62 int mlx4_alloc_buf(struct mlx4_buf *buf, size_t size, int page_size)
66 buf->length = align(size, page_size);
67 buf->buf = mmap(NULL, buf->length, PROT_READ | PROT_WRITE,
68 MAP_PRIVATE | MAP_ANON, -1, 0);
69 if (buf->buf == MAP_FAILED)
72 ret = ibv_dontfork_range(buf->buf, size);
74 munmap(buf->buf, buf->length);
79 void mlx4_free_buf(struct mlx4_buf *buf)
81 ibv_dofork_range(buf->buf, buf->length);
82 munmap(buf->buf, buf->length);