static void
drm_gem_remove_prime_handles(struct drm_gem_object *obj, struct drm_file *filp)
{
if (obj->import_attach) {
drm_prime_remove_imported_buf_handle(&filp->prime,
obj->import_attach->dmabuf);
}
if (obj->export_dma_buf) {
drm_prime_remove_imported_buf_handle(&filp->prime,
obj->export_dma_buf);
}
}
static void
drm_gem_remove_prime_handles(struct drm_gem_object *obj, struct drm_file *filp)
{
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
if (obj->import_attach) {
drm_prime_remove_imported_buf_handle(&filp->prime,
obj->import_attach->dmabuf);
}
if (obj->export_dma_buf) {
drm_prime_remove_imported_buf_handle(&filp->prime,
obj->export_dma_buf);
}
#endif
}
static int
drm_gem_object_release_handle(int id, void *ptr, void *data)
{
struct drm_file *file_priv = data;
struct drm_gem_object *obj = ptr;
struct drm_device *dev = obj->dev;
if (obj->import_attach)
drm_prime_remove_imported_buf_handle(&file_priv->prime,
obj->import_attach->dmabuf);
if (dev->driver->gem_close_object)
dev->driver->gem_close_object(obj, file_priv);
drm_gem_object_handle_unreference_unlocked(obj);
return 0;
}
int
drm_gem_handle_delete(struct drm_file *filp, u32 handle)
{
struct drm_device *dev;
struct drm_gem_object *obj;
/*
*/
spin_lock(&filp->table_lock);
/* */
obj = idr_find(&filp->object_idr, handle);
if (obj == NULL) {
spin_unlock(&filp->table_lock);
return -EINVAL;
}
dev = obj->dev;
/* */
idr_remove(&filp->object_idr, handle);
spin_unlock(&filp->table_lock);
if (obj->import_attach)
drm_prime_remove_imported_buf_handle(&filp->prime,
obj->import_attach->dmabuf);
if (dev->driver->gem_close_object)
dev->driver->gem_close_object(obj, filp);
drm_gem_object_handle_unreference_unlocked(obj);
return 0;
}
/**
* Removes the mapping from handle to filp for this object.
*/
int
drm_gem_handle_delete(struct drm_file *filp, u32 handle)
{
struct drm_device *dev;
struct drm_gem_object *obj;
/* This is gross. The idr system doesn't let us try a delete and
* return an error code. It just spews if you fail at deleting.
* So, we have to grab a lock around finding the object and then
* doing the delete on it and dropping the refcount, or the user
* could race us to double-decrement the refcount and cause a
* use-after-free later. Given the frequency of our handle lookups,
* we may want to use ida for number allocation and a hash table
* for the pointers, anyway.
*/
spin_lock(&filp->table_lock);
/* Check if we currently have a reference on the object */
obj = idr_find(&filp->object_idr, handle);
if (obj == NULL) {
spin_unlock(&filp->table_lock);
return -EINVAL;
}
dev = obj->dev;
/* Release reference and decrement refcount. */
idr_remove(&filp->object_idr, handle);
spin_unlock(&filp->table_lock);
if (obj->import_attach)
drm_prime_remove_imported_buf_handle(&filp->prime,
obj->import_attach->dmabuf);
if (dev->driver->gem_close_object)
dev->driver->gem_close_object(obj, filp);
drm_gem_object_handle_unreference_unlocked(obj);
return 0;
}
