virgl: Allow transfer queue entries to be found and extended.

Intersecting transfer queue entries allow for the possibility of
extending an existing transfer instead of creating a new one (and all
the associated mappign/unmapping).

Signed-off-by: David Riley <[email protected]>
Reviewed-by: Gurchetan Singh <[email protected]>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/gallium/drivers/virgl/virgl_transfer_queue.h b/src/gallium/drivers/virgl/virgl_transfer_queue.h
index 3aebae0620b..403a0f1f4d7 100644
--- a/src/gallium/drivers/virgl/virgl_transfer_queue.h
+++ b/src/gallium/drivers/virgl/virgl_transfer_queue.h
@@ -51,3 +51,10 @@ int virgl_transfer_queue_clear(struct virgl_transfer_queue *queue,
 
 bool virgl_transfer_queue_is_queued(struct virgl_transfer_queue *queue,
                                     struct virgl_transfer *transfer);
+
+/*
+ * Search the transfer queue for a transfer suitable for extension and
+ * extend it to include the new transfer.
+ */
+struct virgl_transfer * virgl_transfer_queue_extend(
+   struct virgl_transfer_queue *queue, struct virgl_transfer *transfer);