LXR linux/drivers/gpu/drm/vmwgfx/vmwgfx_ttm

   1/**************************************************************************
   2 *
   3 * Copyright © 2009-2011 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
  31int 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
  46static 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
  52static void vmw_ttm_mem_global_release(struct drm_global_reference *ref)
  53{
  54        ttm_mem_global_release(ref->object);
  55}
  56
  57int 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;
  89out_no_bo:
  90        drm_global_item_unref(&dev_priv->mem_global_ref);
  91        return ret;
  92}
  93
  94void 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}
  99