Re: [PATCH] drm/gem: add hooks to notify driver when object handle is created/destroyed

[Ben Skeggs <bskeggs@redhat.com>]

On Thu, 2011-06-09 at 10:24 +1000, skeggsb@gmail.com wrote:
> From: Ben Skeggs <bskeggs@redhat.com>
> 
> Nouveau is going to use these hooks to map/unmap objects from a client's
> private GPU address space.
Forgot the v2 notes.. inlined below..

> 
> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
> ---
>  drivers/gpu/drm/drm_gem.c |   21 +++++++++++++++++++--
>  include/drm/drmP.h        |    2 ++
>  2 files changed, 21 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
> index 74e4ff5..bad3359 100644
> --- a/drivers/gpu/drm/drm_gem.c
> +++ b/drivers/gpu/drm/drm_gem.c
> @@ -210,6 +210,8 @@ drm_gem_handle_delete(struct drm_file *filp, u32 handle)
>  	idr_remove(&filp->object_idr, handle);
>  	spin_unlock(&filp->table_lock);
>  
> +	if (dev->driver->gem_close_object)
> +		dev->driver->gem_close_object(obj, filp);
>  	drm_gem_object_handle_unreference_unlocked(obj);
This is the only change, moved the call to the driver hook outside of
the spinlock.

Ben.

>  
>  	return 0;
> @@ -226,7 +228,8 @@ drm_gem_handle_create(struct drm_file *file_priv,
>  		       struct drm_gem_object *obj,
>  		       u32 *handlep)
>  {
> -	int	ret;
> +	struct drm_device *dev = obj->dev;
> +	int ret;
>  
>  	/*
>  	 * Get the user-visible handle using idr.
> @@ -247,6 +250,15 @@ again:
>  		return ret;
>  
>  	drm_gem_object_handle_reference(obj);
> +
> +	if (dev->driver->gem_open_object) {
> +		ret = dev->driver->gem_open_object(obj, file_priv);
> +		if (ret) {
> +			drm_gem_handle_delete(file_priv, *handlep);
> +			return ret;
> +		}
> +	}
> +
>  	return 0;
>  }
>  EXPORT_SYMBOL(drm_gem_handle_create);
> @@ -401,7 +413,12 @@ drm_gem_open(struct drm_device *dev, struct drm_file *file_private)
>  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 (dev->driver->gem_close_object)
> +		dev->driver->gem_close_object(obj, file_priv);
>  
>  	drm_gem_object_handle_unreference_unlocked(obj);
>  
> @@ -417,7 +434,7 @@ void
>  drm_gem_release(struct drm_device *dev, struct drm_file *file_private)
>  {
>  	idr_for_each(&file_private->object_idr,
> -		     &drm_gem_object_release_handle, NULL);
> +		     &drm_gem_object_release_handle, file_private);
>  
>  	idr_remove_all(&file_private->object_idr);
>  	idr_destroy(&file_private->object_idr);
> diff --git a/include/drm/drmP.h b/include/drm/drmP.h
> index 738b3a5..4912cb7 100644
> --- a/include/drm/drmP.h
> +++ b/include/drm/drmP.h
> @@ -886,6 +886,8 @@ struct drm_driver {
>  	 */
>  	int (*gem_init_object) (struct drm_gem_object *obj);
>  	void (*gem_free_object) (struct drm_gem_object *obj);
> +	int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
> +	void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
>  
>  	/* vga arb irq handler */
>  	void (*vgaarb_irq)(struct drm_device *dev, bool state);