84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
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/*
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* Copyright (c) 2006, 2007 Cisco, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#if HAVE_CONFIG_H
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# include <config.h>
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#endif /* HAVE_CONFIG_H */
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#include <stdlib.h>
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#include <errno.h>
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#include <sys/mman.h>
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#include "mlx4.h"
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#if !(defined(HAVE_IBV_DONTFORK_RANGE) && defined(HAVE_IBV_DOFORK_RANGE))
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/*
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* If libibverbs isn't exporting these functions, then there's no
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* point in doing it here, because the rest of libibverbs isn't going
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* to be fork-safe anyway.
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*/
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static int ibv_dontfork_range(void *base, size_t size)
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{
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return 0;
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}
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static int ibv_dofork_range(void *base, size_t size)
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{
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return 0;
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}
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#endif /* HAVE_IBV_DONTFORK_RANGE && HAVE_IBV_DOFORK_RANGE */
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int mlx4_alloc_buf(struct mlx4_buf *buf, size_t size, int page_size)
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{
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int ret;
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buf->length = align(size, page_size);
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buf->buf = mmap(NULL, buf->length, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANON, -1, 0);
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if (buf->buf == MAP_FAILED)
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return errno;
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ret = ibv_dontfork_range(buf->buf, size);
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if (ret)
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munmap(buf->buf, buf->length);
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return ret;
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}
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void mlx4_free_buf(struct mlx4_buf *buf)
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{
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ibv_dofork_range(buf->buf, buf->length);
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munmap(buf->buf, buf->length);
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}
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