drivers/gpu/drm/i915/i915_gem_gtt.c

   1 /*
   2  * Copyright © 2010 Daniel Vetter
   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 "drmP.h"
  26 #include "drm.h"
  27 #include "i915_drm.h"
  28 #include "i915_drv.h"
  29 #include "i915_trace.h"
  30 #include "intel_drv.h"
  31
  32 void i915_gem_restore_gtt_mappings(struct drm_device *dev)
  33 {
  34         struct drm_i915_private *dev_priv = dev->dev_private;
  35         struct drm_i915_gem_object *obj_priv;
  36         int ret;
  37
  38         list_for_each_entry(obj_priv,
  39                             &dev_priv->mm.gtt_list,
  40                             gtt_list) {
  41                 /* Hack to force agp to reinsert buffer object. */
  42                 obj_priv->agp_mem->is_bound = false;
  43                 ret = agp_bind_memory(obj_priv->agp_mem, obj_priv->gtt_space->start / PAGE_SIZE);
  44                 BUG_ON(ret != 0);
  45         }
  46
  47         /* Be paranoid and flush the chipset cache. */
  48         intel_gtt_chipset_flush();
  49 }