From: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx> Document the new function added to sync_file.c v2: Adapt to fence_array v3: Take in Chris Wilson suggestions Signed-off-by: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx> Acked-by: Christian König <christian.koenig@xxxxxxx> Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> --- Documentation/sync_file.txt | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/Documentation/sync_file.txt b/Documentation/sync_file.txt index e8e2eba..b63a685 100644 --- a/Documentation/sync_file.txt +++ b/Documentation/sync_file.txt @@ -64,6 +64,20 @@ 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 passes file descriptor +of the Sync File to the kernel. The kernel can then retrieve the fences +from it. + +Interface: + struct fence *sync_file_get_fence(int fd); + + +The returned reference is owned by the caller and must be disposed of +afterwards using fence_put(). In case of error, a NULL is returned instead. + References: [1] struct sync_file in include/linux/sync_file.h [2] All interfaces mentioned above defined in include/linux/sync_file.h -- 2.5.5 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
