1 /************************************************************************** 2 * 3 * Copyright 2009 Red Hat Inc. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 24 * USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 * 27 **************************************************************************/ 28 /* 29 * Authors: 30 * Dave Airlie <airlied@redhat.com> 31 */ 32 33 #ifndef _DRM_CACHE_H_ 34 #define _DRM_CACHE_H_ 35 36 #include <linux/scatterlist.h> 37 38 void drm_clflush_pages(struct page *pages[], unsigned long num_pages); 39 void drm_clflush_sg(struct sg_table *st); 40 void drm_clflush_virt_range(void *addr, unsigned long length); 41 42 static inline bool drm_arch_can_wc_memory(void) 43 { 44 #if defined(CONFIG_PPC) && !defined(CONFIG_NOT_COHERENT_CACHE) 45 return false; 46 #elif defined(CONFIG_MIPS) && defined(CONFIG_CPU_LOONGSON3) 47 return false; 48 #else 49 return true; 50 #endif 51 } 52 53 #endif 54