common_map.c revision 4f5e7dd7 
1/*
2 * (C) Copyright IBM Corporation 2007
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * on the rights to use, copy, modify, merge, publish, distribute, sub
9 * license, and/or sell copies of the Software, and to permit persons to whom
10 * the Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
19 * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 */
24
25#include <sys/types.h>
26#include <sys/mman.h>
27#include <errno.h>
28
29#include "pciaccess.h"
30#include "pciaccess_private.h"
31
32/**
33 * \file common_map.c
34 * Platform independent memory map routines.
35 *
36 * \author Ian Romanick <idr@us.ibm.com>
37 */
38
39/**
40 * Unmap the specified region using the munmap.
41 *
42 * \param dev    Device whose memory region is to be mapped.
43 * \param map    Memory mapping that is to be undone.
44 *
45 * \return
46 * Zero on success or an \c errno value on failure.
47 *
48 * \sa pci_device_unmap_range
49 */
50_pci_hidden int
51pci_device_generic_unmap_range(struct pci_device *dev,
52			       struct pci_device_mapping *map)
53{
54    return (munmap(map->memory, map->size) == -1) ? errno : 0;
55}
56