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eb9dc6f4 | 1 | /* |
87427da5 | 2 | * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved. |
eb9dc6f4 BS |
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 | /* | |
34 | * This file is conditionally built on PowerPC only. Otherwise weak symbol | |
35 | * versions of the functions exported from here are used. | |
36 | */ | |
37 | ||
38 | #include "ipath_kernel.h" | |
39 | ||
40 | /** | |
1fd3b40f BS |
41 | * ipath_enable_wc - enable write combining for MMIO writes to the device |
42 | * @dd: infinipath device | |
eb9dc6f4 | 43 | * |
1fd3b40f BS |
44 | * Nothing to do on PowerPC, so just return without error. |
45 | */ | |
46 | int ipath_enable_wc(struct ipath_devdata *dd) | |
47 | { | |
48 | return 0; | |
49 | } | |
50 | ||
51 | /** | |
52 | * ipath_unordered_wc - indicate whether write combining is unordered | |
eb9dc6f4 | 53 | * |
1fd3b40f BS |
54 | * Because our performance depends on our ability to do write |
55 | * combining mmio writes in the most efficient way, we need to | |
56 | * know if we are on a processor that may reorder stores when | |
57 | * write combining. | |
eb9dc6f4 BS |
58 | */ |
59 | int ipath_unordered_wc(void) | |
60 | { | |
61 | return 1; | |
62 | } |