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