radeonsi: add save_qbo_state

Save compute shader state that will be used for the ARB_query_buffer_object
implementation.

Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

3 files changed, 22 insertions, 0 deletions

diff --git a/src/gallium/drivers/radeon/r600_pipe_common.h b/src/gallium/drivers/radeon/r600_pipe_common.h
index 96b23b2..32acca5 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.h
+++ b/src/gallium/drivers/radeon/r600_pipe_common.h
@@ -120,6 +120,7 @@ enum r600_coherency {
 struct r600_common_context;
 struct r600_perfcounters;
 struct tgsi_shader_info;
+struct r600_qbo_state;
 
 struct radeon_shader_reloc {
 	char name[32];
@@ -650,6 +651,8 @@ struct r600_common_context {
 	/* Enable or disable occlusion queries. */
 	void (*set_occlusion_query_state)(struct pipe_context *ctx, bool enable);
 
+	void (*save_qbo_state)(struct pipe_context *ctx, struct r600_qbo_state *st);
+
 	/* This ensures there is enough space in the command stream. */
 	void (*need_gfx_cs_space)(struct pipe_context *ctx, unsigned num_dw,
 				  bool include_draw_vbo);
diff --git a/src/gallium/drivers/radeon/r600_query.h b/src/gallium/drivers/radeon/r600_query.h
index 0cd1a02..4f5aa3a 100644
--- a/src/gallium/drivers/radeon/r600_query.h
+++ b/src/gallium/drivers/radeon/r600_query.h
@@ -29,6 +29,7 @@
 #define R600_QUERY_H
 
 #include "pipe/p_defines.h"
+#include "pipe/p_state.h"
 #include "util/list.h"
 
 struct pipe_context;
@@ -267,4 +268,10 @@ void r600_perfcounters_do_destroy(struct r600_perfcounters *);
 void r600_query_hw_reset_buffers(struct r600_common_context *rctx,
 				 struct r600_query_hw *query);
 
+struct r600_qbo_state {
+	void *saved_compute;
+	struct pipe_constant_buffer saved_const0;
+	struct pipe_shader_buffer saved_ssbo[3];
+};
+
 #endif /* R600_QUERY_H */
diff --git a/src/gallium/drivers/radeonsi/si_state.c b/src/gallium/drivers/radeonsi/si_state.c
index 1703e42..443dc37 100644
--- a/src/gallium/drivers/radeonsi/si_state.c
+++ b/src/gallium/drivers/radeonsi/si_state.c
@@ -28,6 +28,7 @@
 #include "si_shader.h"
 #include "sid.h"
 #include "radeon/r600_cs.h"
+#include "radeon/r600_query.h"
 
 #include "util/u_dual_blend.h"
 #include "util/u_format.h"
@@ -1074,6 +1075,16 @@ static void si_set_occlusion_query_state(struct pipe_context *ctx, bool enable)
 	si_mark_atom_dirty(sctx, &sctx->db_render_state);
 }
 
+static void si_save_qbo_state(struct pipe_context *ctx, struct r600_qbo_state *st)
+{
+	struct si_context *sctx = (struct si_context*)ctx;
+
+	st->saved_compute = sctx->cs_shader_state.program;
+
+	si_get_pipe_constant_buffer(sctx, PIPE_SHADER_COMPUTE, 0, &st->saved_const0);
+	si_get_shader_buffers(sctx, PIPE_SHADER_COMPUTE, 0, 3, st->saved_ssbo);
+}
+
 static void si_emit_db_render_state(struct si_context *sctx, struct r600_atom *state)
 {
 	struct radeon_winsys_cs *cs = sctx->b.gfx.cs;
@@ -3498,6 +3509,7 @@ void si_init_state_functions(struct si_context *sctx)
 
 	sctx->b.b.set_active_query_state = si_set_active_query_state;
 	sctx->b.set_occlusion_query_state = si_set_occlusion_query_state;
+	sctx->b.save_qbo_state = si_save_qbo_state;
 	sctx->b.need_gfx_cs_space = si_need_gfx_cs_space;
 
 	sctx->b.b.draw_vbo = si_draw_vbo;