/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
 31int
 32nouveau_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
 44static int
 45nouveau_ttm_mem_global_init(struct ttm_global_reference *ref)
 46{
 47	return ttm_mem_global_init(ref->object);
 48}
 49
 50static void
 51nouveau_ttm_mem_global_release(struct ttm_global_reference *ref)
 52{
 53	ttm_mem_global_release(ref->object);
 54}
 55
 56int
 57nouveau_ttm_global_init(struct drm_nouveau_private *dev_priv)
 58{
 59	struct ttm_global_reference *global_ref;
 60	int ret;
 61
 62	global_ref = &dev_priv->ttm.mem_global_ref;
 63	global_ref->global_type = TTM_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 = ttm_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 = TTM_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 = ttm_global_item_ref(global_ref);
 83	if (unlikely(ret != 0)) {
 84		DRM_ERROR("Failed setting up TTM BO subsystem\n");
 85		ttm_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
 93void
 94nouveau_ttm_global_release(struct drm_nouveau_private *dev_priv)
 95{
 96	if (dev_priv->ttm.mem_global_ref.release == NULL)
 97		return;
 98
 99	ttm_global_item_unref(&dev_priv->ttm.bo_global_ref.ref);
100	ttm_global_item_unref(&dev_priv->ttm.mem_global_ref);
101	dev_priv->ttm.mem_global_ref.release = NULL;
102}
103