mirror of https://gitee.com/openkylin/linux.git
63 lines
2.1 KiB
C
63 lines
2.1 KiB
C
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/*
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* Copyright (c) 2006, 2007, 2008 QLogic Corporation. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/*
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* This file is conditionally built on PowerPC only. Otherwise weak symbol
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* versions of the functions exported from here are used.
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*/
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#include "qib.h"
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/**
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* qib_enable_wc - enable write combining for MMIO writes to the device
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* @dd: qlogic_ib device
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*
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* Nothing to do on PowerPC, so just return without error.
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*/
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int qib_enable_wc(struct qib_devdata *dd)
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{
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return 0;
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}
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/**
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* qib_unordered_wc - indicate whether write combining is unordered
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*
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* Because our performance depends on our ability to do write
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* combining mmio writes in the most efficient way, we need to
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* know if we are on a processor that may reorder stores when
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* write combining.
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*/
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int qib_unordered_wc(void)
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{
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return 1;
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}
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