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