Mesa (master): radv/gfx10: make GDS idle when leaving the IB

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Module: Mesa
Branch: master
Commit: 7314f6ef97cd3dabb75774abc6283a8813e158ca
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=7314f6ef97cd3dabb75774abc6283a8813e158ca

Author: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Date:   Tue Sep 10 10:56:24 2019 +0200

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 at gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>

---

 src/amd/vulkan/radv_cmd_buffer.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c
index 5b736c67ae8..f0fdad68a94 100644
--- 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);
 	}