From: Gustavo Padovan gustavo.padovan@collabora.co.uk
Document the new function added to sync_file.c
v2: Adapt to fence_array
Signed-off-by: Gustavo Padovan gustavo.padovan@collabora.co.uk Acked-by: Christian König christian.koenig@amd.com --- Documentation/sync_file.txt | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/Documentation/sync_file.txt b/Documentation/sync_file.txt index e8e2eba..ae2dbad1 100644 --- a/Documentation/sync_file.txt +++ b/Documentation/sync_file.txt @@ -64,6 +64,21 @@ The sync_file fd now can be sent to userspace. If the creation process fail, or the sync_file needs to be released by any other reason fput(sync_file->file) should be used.
+Receiving Sync Files from Userspace +----------------------------------- + +When userspace needs to send an in-fence to the driver it pass file descriptor +of the Sync File to the kernel. The kernel then can retrieve the fences +from it. + +Interface: + struct fence *sync_file_get_fence(int fd); + + +The function return a struct fence pointer referencing the fence(s) in the Sync +File. + + References: [1] struct sync_file in include/linux/sync_file.h [2] All interfaces mentioned above defined in include/linux/sync_file.h