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