include/drm/drm_cache.h

   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
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  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,
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  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