radeonsi: make const and stream uploaders allocate read-only memory

and anything that clones these uploaders, like u_threaded_context.

Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

diff --git a/src/gallium/drivers/radeon/r600_pipe_common.c b/src/gallium/drivers/radeon/r600_pipe_common.c
index 9090e65..9e45a9f 100644 (file)
--- a/src/gallium/drivers/radeon/r600_pipe_common.c
+++ b/src/gallium/drivers/radeon/r600_pipe_common.c
@@ -445,12 +445,15 @@ bool si_common_context_init(struct r600_common_context *rctx,
                return false;
 
        rctx->b.stream_uploader = u_upload_create(&rctx->b, 1024 * 1024,
-                                                 0, PIPE_USAGE_STREAM, 0);
+                                                 0, PIPE_USAGE_STREAM,
+                                                 R600_RESOURCE_FLAG_READ_ONLY);
        if (!rctx->b.stream_uploader)
                return false;
 
        rctx->b.const_uploader = u_upload_create(&rctx->b, 128 * 1024,
-                                                0, PIPE_USAGE_DEFAULT, 0);
+                                                0, PIPE_USAGE_DEFAULT,
+                                                sscreen->cpdma_prefetch_writes_memory ?
+                                                       0 : R600_RESOURCE_FLAG_READ_ONLY);
        if (!rctx->b.const_uploader)
                return false;