drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * 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
  28 #include <drm/drmP.h>
  29 #include "vmwgfx_drv.h"
  30
  31 int vmw_mmap(struct file *filp, struct vm_area_struct *vma)
  32 {
  33         struct drm_file *file_priv;
  34         struct vmw_private *dev_priv;
  35
  36         if (unlikely(vma->vm_pgoff < VMWGFX_FILE_PAGE_OFFSET)) {
  37                 DRM_ERROR("Illegal attempt to mmap old fifo space.\n");
  38                 return -EINVAL;
  39         }
  40
  41         file_priv = filp->private_data;
  42         dev_priv = vmw_priv(file_priv->minor->dev);
  43         return ttm_bo_mmap(filp, vma, &dev_priv->bdev);
  44 }
  45
  46 static int vmw_ttm_mem_global_init(struct drm_global_reference *ref)
  47 {
  48         DRM_INFO("global init.\n");
  49         return ttm_mem_global_init(ref->object);
  50 }
  51
  52 static void vmw_ttm_mem_global_release(struct drm_global_reference *ref)
  53 {
  54         ttm_mem_global_release(ref->object);
  55 }
  56
  57 int vmw_ttm_global_init(struct vmw_private *dev_priv)
  58 {
  59         struct drm_global_reference *global_ref;
  60         int ret;
  61
  62         global_ref = &dev_priv->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 = &vmw_ttm_mem_global_init;
  66         global_ref->release = &vmw_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                 return ret;
  72         }
  73
  74         dev_priv->bo_global_ref.mem_glob =
  75                 dev_priv->mem_global_ref.object;
  76         global_ref = &dev_priv->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         ret = drm_global_item_ref(global_ref);
  82
  83         if (unlikely(ret != 0)) {
  84                 DRM_ERROR("Failed setting up TTM buffer objects.\n");
  85                 goto out_no_bo;
  86         }
  87
  88         return 0;
  89 out_no_bo:
  90         drm_global_item_unref(&dev_priv->mem_global_ref);
  91         return ret;
  92 }
  93
  94 void vmw_ttm_global_release(struct vmw_private *dev_priv)
  95 {
  96         drm_global_item_unref(&dev_priv->bo_global_ref.ref);
  97         drm_global_item_unref(&dev_priv->mem_global_ref);
  98 }