gallium: extend pipe_context::flush for it to accept an END_OF_FRAME flag

Usage with pipe_context:
  pipe->flush(pipe, NULL, PIPE_FLUSH_END_OF_FRAME);

Usage with st_context_iface:
  st->flush(st, ST_FLUSH_END_OF_FRAME, NULL);

The flag is only a hint for drivers. Radeon will use it for buffer eviction
heuristics in the kernel (e.g. for queries like how many frames have passed
since a buffer was used).

The flag is currently only generated by st/dri on SwapBuffers.

Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>

1 files changed, 7 insertions, 1 deletions

diff --git a/src/mesa/state_tracker/st_manager.c b/src/mesa/state_tracker/st_manager.c
index 30f5ca5..a3a6771 100644
--- a/src/mesa/state_tracker/st_manager.c
+++ b/src/mesa/state_tracker/st_manager.c
@@ -455,7 +455,13 @@ st_context_flush(struct st_context_iface *stctxi, unsigned flags,
                  struct pipe_fence_handle **fence)
 {
    struct st_context *st = (struct st_context *) stctxi;
-   st_flush(st, fence);
+   enum pipe_flush_flags pipe_flags = 0;
+
+   if (flags & ST_FLUSH_END_OF_FRAME) {
+      pipe_flags |= PIPE_FLUSH_END_OF_FRAME;
+   }
+
+   st_flush(st, fence, pipe_flags);
    if (flags & ST_FLUSH_FRONT)
       st_manager_flush_frontbuffer(st);
 }