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-rw-r--r--src/gallium/docs/source/context.rst14
-rw-r--r--src/gallium/include/pipe/p_defines.h2
2 files changed, 16 insertions, 0 deletions
diff --git a/src/gallium/docs/source/context.rst b/src/gallium/docs/source/context.rst
index 81822203728..8aee21b2ed4 100644
--- a/src/gallium/docs/source/context.rst
+++ b/src/gallium/docs/source/context.rst
@@ -530,6 +530,20 @@ which use this flag must implement pipe_context::fence_server_sync.
PIPE_FLUSH_HINT_FINISH: Hints to the driver that the caller will immediately
wait for the returned fence.
+Additional flags may be set together with ``PIPE_FLUSH_DEFERRED`` for even
+finer-grained fences. Note that as a general rule, GPU caches may not have been
+flushed yet when these fences are signaled. Drivers are free to ignore these
+flags and create normal fences instead. At most one of the following flags can
+be specified:
+
+PIPE_FLUSH_TOP_OF_PIPE: The fence should be signaled as soon as the next
+command is ready to start executing at the top of the pipeline, before any of
+its data is actually read (including indirect draw parameters).
+
+PIPE_FLUSH_BOTTOM_OF_PIPE: The fence should be signaled as soon as the previous
+command has finished executing on the GPU entirely (but data written by the
+command may still be in caches and inaccessible to the CPU).
+
``flush_resource``
diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 776a879e0a6..5078a11f008 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -354,6 +354,8 @@ enum pipe_flush_flags
PIPE_FLUSH_FENCE_FD = (1 << 2),
PIPE_FLUSH_ASYNC = (1 << 3),
PIPE_FLUSH_HINT_FINISH = (1 << 4),
+ PIPE_FLUSH_TOP_OF_PIPE = (1 << 5),
+ PIPE_FLUSH_BOTTOM_OF_PIPE = (1 << 6),
};
/**