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