tree 1301937b7c2153ea367906fd5d490a0617695747
parent ea6df1ce37a53f039a28782114062b1ab7cebab4
author Nicolai Hähnle <nicolai.haehnle@amd.com> 1508686728 +0200
committer Nicolai Hähnle <nicolai.haehnle@amd.com> 1510232296 +0100

gallium: add PIPE_FLUSH_{TOP,BOTTOM}_OF_PIPE bits

These bits are intended to be used by the ddebug hang detection and are
named in analogy to the Vulkan stage bits (and the corresponding Radeon
pipeline event).

Hang detection needs fences on the granularity of individual commands,
which nothing else really covers. The closest alternative would have
been PIPE_QUERY_GPU_FINISHED, but (a) queries are a per-context object
and we really want a per-screen object, (b) queries don't offer a
wait with timeout, and (c) in any case, PIPE_QUERY_GPU_FINISHED is
meant to imply that GPU caches are flushed, which the new bits
explicitly aren't.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>