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;
  36
  37         /* First fill our portion of the GTT with scratch pages */
  38         intel_gtt_clear_range(dev_priv->mm.gtt_start / PAGE_SIZE,
  39                               (dev_priv->mm.gtt_end - dev_priv->mm.gtt_start) / PAGE_SIZE);
  40
  41         list_for_each_entry(obj, &dev_priv->mm.gtt_list, gtt_list) {
  42                 i915_gem_clflush_object(obj);
  43
  44                 if (dev_priv->mm.gtt->needs_dmar) {
  45                         BUG_ON(!obj->sg_list);
  46
  47                         intel_gtt_insert_sg_entries(obj->sg_list,
  48                                                     obj->num_sg,
  49                                                     obj->gtt_space->start
  50                                                         >> PAGE_SHIFT,
  51                                                     obj->agp_type);
  52                 } else
  53                         intel_gtt_insert_pages(obj->gtt_space->start
  54                                                    >> PAGE_SHIFT,
  55                                                obj->base.size >> PAGE_SHIFT,
  56                                                obj->pages,
  57                                                obj->agp_type);
  58         }
  59
  60         intel_gtt_chipset_flush();
  61 }
  62
  63 int i915_gem_gtt_bind_object(struct drm_i915_gem_object *obj)
  64 {
  65         struct drm_device *dev = obj->base.dev;
  66         struct drm_i915_private *dev_priv = dev->dev_private;
  67         int ret;
  68
  69         if (dev_priv->mm.gtt->needs_dmar) {
  70                 ret = intel_gtt_map_memory(obj->pages,
  71                                            obj->base.size >> PAGE_SHIFT,
  72                                            &obj->sg_list,
  73                                            &obj->num_sg);
  74                 if (ret != 0)
  75                         return ret;
  76
  77                 intel_gtt_insert_sg_entries(obj->sg_list,
  78                                             obj->num_sg,
  79                                             obj->gtt_space->start >> PAGE_SHIFT,
  80                                             obj->agp_type);
  81         } else
  82                 intel_gtt_insert_pages(obj->gtt_space->start >> PAGE_SHIFT,
  83                                        obj->base.size >> PAGE_SHIFT,
  84                                        obj->pages,
  85                                        obj->agp_type);
  86
  87         return 0;
  88 }
  89
  90 void i915_gem_gtt_unbind_object(struct drm_i915_gem_object *obj)
  91 {
  92         intel_gtt_clear_range(obj->gtt_space->start >> PAGE_SHIFT,
  93                               obj->base.size >> PAGE_SHIFT);
  94
  95         if (obj->sg_list) {
  96                 intel_gtt_unmap_memory(obj->sg_list, obj->num_sg);
  97                 obj->sg_list = NULL;
  98         }
  99 }