OpenGL API calls like glClearBufferData() result in mapping/unmapping
of a given buffer by Mesa and unmapping of a host blob fails in
virglrenderer because VirGL driver uses command that is intended for
unmapping of a guest buffer. In particular this causes problem for the
"Total War: Warhammer" game that gets GL_OUT_OF_MEMORY error due to the
failed unmapping command. Fix this by setting the mapping usage flag in
accordance to the resource flags, allowing virgl_buffer_transfer_unmap()
to differentiate host buffer from guest.
Fixes: 3b54e5837a ("virgl: support PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT")
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17914>
Dmitry Osipenko
46396e97be