Bryan O'Sullivan | eb9dc6f | 2006-08-25 11:24:26 -0700 | [diff] [blame] | 1 | /* |
John Gregor | 87427da | 2007-06-11 10:21:14 -0700 | [diff] [blame] | 2 | * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved. |
Bryan O'Sullivan | eb9dc6f | 2006-08-25 11:24:26 -0700 | [diff] [blame] | 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 | /** |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 41 | * ipath_enable_wc - enable write combining for MMIO writes to the device |
| 42 | * @dd: infinipath device |
Bryan O'Sullivan | eb9dc6f | 2006-08-25 11:24:26 -0700 | [diff] [blame] | 43 | * |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 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 |
Bryan O'Sullivan | eb9dc6f | 2006-08-25 11:24:26 -0700 | [diff] [blame] | 53 | * |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 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. |
Bryan O'Sullivan | eb9dc6f | 2006-08-25 11:24:26 -0700 | [diff] [blame] | 58 | */ |
| 59 | int ipath_unordered_wc(void) |
| 60 | { |
| 61 | return 1; |
| 62 | } |