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 5b736c6..f0fdad6 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);
        }