It's done automatically for vertex buffers, but not for constant buffers,
textures, and colorbuffers.
---
src/gallium/drivers/r600/r600_blit.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/src/gallium/drivers/r600/r600_blit.c
b/src/gallium/drivers/r600/r600_blit.c
index ba5d4ea..2230e7b 100644
--- a/src/gallium/drivers/r600/r600_blit.c
+++ b/src/gallium/drivers/r600/r600_blit.c
@@ -569,9 +569,17 @@ void r600_copy_buffer(struct pipe_context *ctx, struct
pipe_resource *dst, unsig
else if (rctx->screen->has_streamout &&
/* Require 4-byte alignment. */
dstx % 4 == 0 && src_box->x % 4 == 0 && src_box->width % 4 ==
0) {
+
+ /* Flush both resources. */
+ r600_flag_resource_cache_flush(rctx, src);
+ r600_flag_resource_cache_flush(rctx, dst);
+
r600_blitter_begin(ctx, R600_COPY_BUFFER);
util_blitter_copy_buffer(rctx->blitter, dst, dstx, src,
src_box->x, src_box->width);
r600_blitter_end(ctx);
+
+ /* Flush the dst in case the 3D engine has been prefetching the
resource. */
+ r600_flag_resource_cache_flush(rctx, dst);
} else {
util_resource_copy_region(ctx, dst, 0, dstx, 0, 0, src, 0,
src_box);
}
@@ -594,10 +602,15 @@ static void r600_clear_buffer(struct pipe_context *ctx,
struct pipe_resource *ds
clear_value.ui[0] = v | (v << 8) | (v << 16) | (v << 24);
+ r600_flag_resource_cache_flush(rctx, dst);
+
r600_blitter_begin(ctx, R600_DISABLE_RENDER_COND);
util_blitter_clear_buffer(rctx->blitter, dst, offset, size,
1, &clear_value);
r600_blitter_end(ctx);
+
+ /* Flush again in case the 3D engine has been prefetching the
resource. */
+ r600_flag_resource_cache_flush(rctx, dst);
} else {
char *map = r600_buffer_mmap_sync_with_rings(rctx,
r600_resource(dst),
PIPE_TRANSFER_WRITE);
--
1.8.1.2
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