From: Gustavo Padovan gustavo.padovan@collabora.co.uk
The struct aggregates fences that we need to wait on before proceed with some specific operation. In DRM, for example, we may wait for a group of fences to signal before we scanout the buffers related to those fences.
Signed-off-by: Gustavo Padovan gustavo.padovan@collabora.co.uk --- include/linux/fence.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/include/linux/fence.h b/include/linux/fence.h index 605bd88..3d1151f 100644 --- a/include/linux/fence.h +++ b/include/linux/fence.h @@ -104,6 +104,22 @@ struct fence_cb { fence_func_t func; };
+typedef void (*collection_put_func_t)(void *data); + +/** + * struct fence_collection - aggregate fences together + * @num_fences: number of fence in the collection. + * @user_data: user data. + * @func: user callback to put user data. + * @fences: array of @num_fences fences. + */ +struct fence_collection { + int num_fences; + void *user_data; + collection_put_func_t func; + struct fence *fences[]; +}; + /** * struct fence_ops - operations implemented for fence * @get_driver_name: returns the driver name.