release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/gpu/drm/nouveau/nouveau_ttm.c

   1 /*
   2  * Copyright (c) 2007-2008 Tungsten Graphics, Inc., Cedar Park, TX., USA,
   3  * All Rights Reserved.
   4  * Copyright (c) 2009 VMware, Inc., Palo Alto, CA., USA,
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sub license,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to 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,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27 #include "drmP.h"
  28
  29 #include "nouveau_drv.h"
  30
  31 int
  32 nouveau_ttm_mmap(struct file *filp, struct vm_area_struct *vma)
  33 {
  34         struct drm_file *file_priv = filp->private_data;
  35         struct drm_nouveau_private *dev_priv =
  36                 file_priv->minor->dev->dev_private;
  37
  38         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
  39                 return drm_mmap(filp, vma);
  40
  41         return ttm_bo_mmap(filp, vma, &dev_priv->ttm.bdev);
  42 }
  43
  44 static int
  45 nouveau_ttm_mem_global_init(struct drm_global_reference *ref)
  46 {
  47         return ttm_mem_global_init(ref->object);
  48 }
  49
  50 static void
  51 nouveau_ttm_mem_global_release(struct drm_global_reference *ref)
  52 {
  53         ttm_mem_global_release(ref->object);
  54 }
  55
  56 int
  57 nouveau_ttm_global_init(struct drm_nouveau_private *dev_priv)
  58 {
  59         struct drm_global_reference *global_ref;
  60         int ret;
  61
  62         global_ref = &dev_priv->ttm.mem_global_ref;
  63         global_ref->global_type = DRM_GLOBAL_TTM_MEM;
  64         global_ref->size = sizeof(struct ttm_mem_global);
  65         global_ref->init = &nouveau_ttm_mem_global_init;
  66         global_ref->release = &nouveau_ttm_mem_global_release;
  67
  68         ret = drm_global_item_ref(global_ref);
  69         if (unlikely(ret != 0)) {
  70                 DRM_ERROR("Failed setting up TTM memory accounting\n");
  71                 dev_priv->ttm.mem_global_ref.release = NULL;
  72                 return ret;
  73         }
  74
  75         dev_priv->ttm.bo_global_ref.mem_glob = global_ref->object;
  76         global_ref = &dev_priv->ttm.bo_global_ref.ref;
  77         global_ref->global_type = DRM_GLOBAL_TTM_BO;
  78         global_ref->size = sizeof(struct ttm_bo_global);
  79         global_ref->init = &ttm_bo_global_init;
  80         global_ref->release = &ttm_bo_global_release;
  81
  82         ret = drm_global_item_ref(global_ref);
  83         if (unlikely(ret != 0)) {
  84                 DRM_ERROR("Failed setting up TTM BO subsystem\n");
  85                 drm_global_item_unref(&dev_priv->ttm.mem_global_ref);
  86                 dev_priv->ttm.mem_global_ref.release = NULL;
  87                 return ret;
  88         }
  89
  90         return 0;
  91 }
  92
  93 void
  94 nouveau_ttm_global_release(struct drm_nouveau_private *dev_priv)
  95 {
  96         if (dev_priv->ttm.mem_global_ref.release == NULL)
  97                 return;
  98
  99         drm_global_item_unref(&dev_priv->ttm.bo_global_ref.ref);
 100         drm_global_item_unref(&dev_priv->ttm.mem_global_ref);
 101         dev_priv->ttm.mem_global_ref.release = NULL;
 102 }