1 /*
2 * Copyright (c) 2006-2007 Mellanox Technologies. 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 #include <linux/pci.h>
34 #include "wc.h"
35
36 #if defined(__i386__) || defined(__x86_64__)
37
pgprot_wc(pgprot_t _prot)38 pgprot_t pgprot_wc(pgprot_t _prot)
39 {
40 return pgprot_writecombine(_prot);
41 }
42
mlx4_wc_enabled(void)43 int mlx4_wc_enabled(void)
44 {
45 return 1;
46 }
47
48 #elif defined(CONFIG_PPC64)
49
pgprot_wc(pgprot_t _prot)50 pgprot_t pgprot_wc(pgprot_t _prot)
51 {
52 return __pgprot((pgprot_val(_prot) | _PAGE_NO_CACHE) &
53 ~(pgprot_t)_PAGE_GUARDED);
54 }
55
mlx4_wc_enabled(void)56 int mlx4_wc_enabled(void)
57 {
58 return 1;
59 }
60
61 #else /* !(defined(__i386__) || defined(__x86_64__)) */
62
pgprot_wc(pgprot_t _prot)63 pgprot_t pgprot_wc(pgprot_t _prot)
64 {
65 return pgprot_noncached(_prot);
66 }
67
mlx4_wc_enabled(void)68 int mlx4_wc_enabled(void)
69 {
70 return 0;
71 }
72
73 #endif
74