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 38pgprot_t pgprot_wc(pgprot_t _prot) 39{ 40 return pgprot_writecombine(_prot); 41} 42 43int mlx4_wc_enabled(void) 44{ 45 return 1; 46} 47 48#elif defined(CONFIG_PPC64) 49 50pgprot_t pgprot_wc(pgprot_t _prot) 51{ 52 return __pgprot((pgprot_val(_prot) | _PAGE_NO_CACHE) & 53 ~(pgprot_t)_PAGE_GUARDED); 54} 55 56int mlx4_wc_enabled(void) 57{ 58 return 1; 59} 60 61#else /* !(defined(__i386__) || defined(__x86_64__)) */ 62 63pgprot_t pgprot_wc(pgprot_t _prot) 64{ 65 return pgprot_noncached(_prot); 66} 67 68int mlx4_wc_enabled(void) 69{ 70 return 0; 71} 72 73#endif 74