linux/drivers/gpu/drm/i915/i915_gem_object.c
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   1/*
   2 * Copyright © 2017 Intel Corporation
   3 *
   4 * Permission is hereby granted, free of charge, to any person obtaining a
   5 * copy of this software and associated documentation files (the "Software"),
   6 * to deal in the Software without restriction, including without limitation
   7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 * and/or sell copies of the Software, and to permit persons to whom the
   9 * Software is furnished to do so, subject to the following conditions:
  10 *
  11 * The above copyright notice and this permission notice (including the next
  12 * paragraph) shall be included in all copies or substantial portions of the
  13 * Software.
  14 *
  15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21 * IN THE SOFTWARE.
  22 *
  23 */
  24
  25#include "i915_drv.h"
  26#include "i915_gem_object.h"
  27
  28/**
  29 * Mark up the object's coherency levels for a given cache_level
  30 * @obj: #drm_i915_gem_object
  31 * @cache_level: cache level
  32 */
  33void i915_gem_object_set_cache_coherency(struct drm_i915_gem_object *obj,
  34                                         unsigned int cache_level)
  35{
  36        obj->cache_level = cache_level;
  37
  38        if (cache_level != I915_CACHE_NONE)
  39                obj->cache_coherent = (I915_BO_CACHE_COHERENT_FOR_READ |
  40                                       I915_BO_CACHE_COHERENT_FOR_WRITE);
  41        else if (HAS_LLC(to_i915(obj->base.dev)))
  42                obj->cache_coherent = I915_BO_CACHE_COHERENT_FOR_READ;
  43        else
  44                obj->cache_coherent = 0;
  45
  46        obj->cache_dirty =
  47                !(obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_WRITE);
  48}
  49