1219820Sjeff/*
2219820Sjeff * Copyright (c) 2006-2007 Mellanox Technologies. All rights reserved.
3219820Sjeff *
4219820Sjeff * This software is available to you under a choice of one of two
5219820Sjeff * licenses.  You may choose to be licensed under the terms of the GNU
6219820Sjeff * General Public License (GPL) Version 2, available from the file
7219820Sjeff * COPYING in the main directory of this source tree, or the
8219820Sjeff * OpenIB.org BSD license below:
9219820Sjeff *
10219820Sjeff *     Redistribution and use in source and binary forms, with or
11219820Sjeff *     without modification, are permitted provided that the following
12219820Sjeff *     conditions are met:
13219820Sjeff *
14219820Sjeff *      - Redistributions of source code must retain the above
15219820Sjeff *        copyright notice, this list of conditions and the following
16219820Sjeff *        disclaimer.
17219820Sjeff *
18219820Sjeff *      - Redistributions in binary form must reproduce the above
19219820Sjeff *        copyright notice, this list of conditions and the following
20219820Sjeff *        disclaimer in the documentation and/or other materials
21219820Sjeff *        provided with the distribution.
22219820Sjeff *
23219820Sjeff * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24219820Sjeff * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25219820Sjeff * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26219820Sjeff * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27219820Sjeff * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28219820Sjeff * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29219820Sjeff * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30219820Sjeff * SOFTWARE.
31219820Sjeff */
32219820Sjeff
33219820Sjeff#include <linux/pci.h>
34219820Sjeff#include "wc.h"
35219820Sjeff
36219820Sjeff#if defined(__i386__) || defined(__x86_64__)
37219820Sjeff
38219820Sjeffpgprot_t pgprot_wc(pgprot_t _prot)
39219820Sjeff{
40219820Sjeff	return pgprot_writecombine(_prot);
41219820Sjeff}
42219820Sjeff
43219820Sjeffint mlx4_wc_enabled(void)
44219820Sjeff{
45219820Sjeff	return 1;
46219820Sjeff}
47219820Sjeff
48219820Sjeff#elif defined(CONFIG_PPC64)
49219820Sjeff
50219820Sjeffpgprot_t pgprot_wc(pgprot_t _prot)
51219820Sjeff{
52219820Sjeff	return __pgprot((pgprot_val(_prot) | _PAGE_NO_CACHE) &
53219820Sjeff				     ~(pgprot_t)_PAGE_GUARDED);
54219820Sjeff}
55219820Sjeff
56219820Sjeffint mlx4_wc_enabled(void)
57219820Sjeff{
58219820Sjeff	return 1;
59219820Sjeff}
60219820Sjeff
61219820Sjeff#else	/* !(defined(__i386__) || defined(__x86_64__)) */
62219820Sjeff
63219820Sjeffpgprot_t pgprot_wc(pgprot_t _prot)
64219820Sjeff{
65219820Sjeff	return pgprot_noncached(_prot);
66219820Sjeff}
67219820Sjeff
68219820Sjeffint mlx4_wc_enabled(void)
69219820Sjeff{
70219820Sjeff	return 0;
71219820Sjeff}
72219820Sjeff
73219820Sjeff#endif
74219820Sjeff
75