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/*
* Copyright (c) 2007-2008 Tungsten Graphics, Inc., Cedar Park, TX., USA,
* All Rights Reserved.
* Copyright (c) 2009 VMware, Inc., Palo Alto, CA., USA,
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sub license,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "drmP.h"
#include "nouveau_drv.h"
static struct vm_operations_struct nouveau_ttm_vm_ops;
static const struct vm_operations_struct *ttm_vm_ops;
static int
nouveau_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct ttm_buffer_object *bo = vma->vm_private_data;
int ret;
if (unlikely(bo == NULL))
return VM_FAULT_NOPAGE;
ret = ttm_vm_ops->fault(vma, vmf);
return ret;
}
int
nouveau_ttm_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct drm_file *file_priv = filp->private_data;
struct drm_nouveau_private *dev_priv =
file_priv->minor->dev->dev_private;
int ret;
if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
return drm_mmap(filp, vma);
ret = ttm_bo_mmap(filp, vma, &dev_priv->ttm.bdev);
if (unlikely(ret != 0))
return ret;
if (unlikely(ttm_vm_ops == NULL)) {
ttm_vm_ops = vma->vm_ops;
nouveau_ttm_vm_ops = *ttm_vm_ops;
nouveau_ttm_vm_ops.fault = &nouveau_ttm_fault;
}
vma->vm_ops = &nouveau_ttm_vm_ops;
return 0;
}
static int
nouveau_ttm_mem_global_init(struct ttm_global_reference *ref)
{
return ttm_mem_global_init(ref->object);
}
static void
nouveau_ttm_mem_global_release(struct ttm_global_reference *ref)
{
ttm_mem_global_release(ref->object);
}
int
nouveau_ttm_global_init(struct drm_nouveau_private *dev_priv)
{
struct ttm_global_reference *global_ref;
int ret;
global_ref = &dev_priv->ttm.mem_global_ref;
global_ref->global_type = TTM_GLOBAL_TTM_MEM;
global_ref->size = sizeof(struct ttm_mem_global);
global_ref->init = &nouveau_ttm_mem_global_init;
global_ref->release = &nouveau_ttm_mem_global_release;
ret = ttm_global_item_ref(global_ref);
if (unlikely(ret != 0)) {
DRM_ERROR("Failed setting up TTM memory accounting\n");
dev_priv->ttm.mem_global_ref.release = NULL;
return ret;
}
dev_priv->ttm.bo_global_ref.mem_glob = global_ref->object;
global_ref = &dev_priv->ttm.bo_global_ref.ref;
global_ref->global_type = TTM_GLOBAL_TTM_BO;
global_ref->size = sizeof(struct ttm_bo_global);
global_ref->init = &ttm_bo_global_init;
global_ref->release = &ttm_bo_global_release;
ret = ttm_global_item_ref(global_ref);
if (unlikely(ret != 0)) {
DRM_ERROR("Failed setting up TTM BO subsystem\n");
ttm_global_item_unref(&dev_priv->ttm.mem_global_ref);
dev_priv->ttm.mem_global_ref.release = NULL;
return ret;
}
return 0;
}
void
nouveau_ttm_global_release(struct drm_nouveau_private *dev_priv)
{
if (dev_priv->ttm.mem_global_ref.release == NULL)
return;
ttm_global_item_unref(&dev_priv->ttm.bo_global_ref.ref);
ttm_global_item_unref(&dev_priv->ttm.mem_global_ref);
dev_priv->ttm.mem_global_ref.release = NULL;
}
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