radv/gfx10: make GDS idle when leaving the IB

NGG streamout uses GDS and we have to make sure that another
process isn't going to overwrite GDS while our shaders are busy.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c
index 5b736c67ae83199967bb615f1f0bedb473fa9db1..f0fdad68a94c3767e7c792544fa2fe60912327d0 100644 (file)
--- a/src/amd/vulkan/radv_cmd_buffer.c
+++ b/src/amd/vulkan/radv_cmd_buffer.c
@@ -3615,6 +3615,13 @@ VkResult radv_EndCommandBuffer(
                 */
                cmd_buffer->state.flush_bits |= cmd_buffer->active_query_flush_bits;
 
+               /* Since NGG streamout uses GDS, we need to make GDS idle when
+                * we leave the IB, otherwise another process might overwrite
+                * it while our shaders are busy.
+                */
+               if (cmd_buffer->gds_needed)
+                       cmd_buffer->state.flush_bits |= RADV_CMD_FLAG_PS_PARTIAL_FLUSH;
+
                si_emit_cache_flush(cmd_buffer);
        }