r600g: adjust vs/ps gprs on r600/r700 cards when needed.

Ideally we'd have a compiler and register spilling and all that
but this is good enough for now to avoid the gpu hang in piglit,

glsl-vs-vec4-indexing-temp-dst-in-nested-loop-combined

on r600/r700 cards.

based on r600c patch
Andre Maasikas <[email protected]>
r600c: bump sq gpr resources if a shader needs more than default

Signed-off-by: Dave Airlie <[email protected]>

3 files changed, 51 insertions, 2 deletions

diff --git a/src/gallium/drivers/r600/r600_pipe.h b/src/gallium/drivers/r600/r600_pipe.h
index d92b74ebc4e..332f932013a 100644
--- a/src/gallium/drivers/r600/r600_pipe.h
+++ b/src/gallium/drivers/r600/r600_pipe.h
@@ -205,6 +205,7 @@ struct r600_pipe_context {
 	struct util_slab_mempool	pool_transfers;
 	boolean				blit;
 
+	unsigned default_ps_gprs, default_vs_gprs;
 };
 
 struct r600_drawl {
@@ -270,6 +271,7 @@ void r600_pipe_init_buffer_resource(struct r600_pipe_context *rctx,
 void r600_pipe_mod_buffer_resource(struct r600_pipe_resource_state *rstate,
 				   struct r600_resource *rbuffer,
 				   unsigned offset, unsigned stride);
+void r600_adjust_gprs(struct r600_pipe_context *rctx);
 
 /* r600_texture.c */
 void r600_init_screen_texture_functions(struct pipe_screen *screen);
diff --git a/src/gallium/drivers/r600/r600_state.c b/src/gallium/drivers/r600/r600_state.c
index 3851042965c..5a1c456309b 100644
--- a/src/gallium/drivers/r600/r600_state.c
+++ b/src/gallium/drivers/r600/r600_state.c
@@ -1025,6 +1025,46 @@ void r600_init_state_functions(struct r600_pipe_context *rctx)
 	rctx->context.texture_barrier = r600_texture_barrier;
 }
 
+void r600_adjust_gprs(struct r600_pipe_context *rctx)
+{
+	enum radeon_family family;
+	struct r600_pipe_state rstate;
+	unsigned num_ps_gprs = rctx->default_ps_gprs;
+	unsigned num_vs_gprs = rctx->default_vs_gprs;
+	unsigned tmp;
+	int diff;
+
+	family = r600_get_family(rctx->radeon);
+
+	if (family >= CHIP_CEDAR)
+		return;
+
+	if (!rctx->ps_shader && !rctx->vs_shader)
+		return;
+
+	if (rctx->ps_shader->shader.bc.ngpr > rctx->default_ps_gprs)
+	{
+		diff = rctx->ps_shader->shader.bc.ngpr - rctx->default_ps_gprs;
+		num_vs_gprs -= diff;
+		num_ps_gprs += diff;
+	}
+
+	if (rctx->vs_shader->shader.bc.ngpr > rctx->default_vs_gprs)
+	{
+		diff = rctx->vs_shader->shader.bc.ngpr - rctx->default_vs_gprs;
+		num_ps_gprs -= diff;
+		num_vs_gprs += diff;
+	}
+
+	tmp = 0;
+	tmp |= S_008C04_NUM_PS_GPRS(num_ps_gprs);
+	tmp |= S_008C04_NUM_VS_GPRS(num_vs_gprs);
+	rstate.nregs = 0;
+	r600_pipe_state_add_reg(&rstate, R_008C04_SQ_GPR_RESOURCE_MGMT_1, tmp, 0x0FFFFFFF, NULL);
+
+	r600_context_pipe_state_set(&rctx->ctx, &rstate);
+}
+
 void r600_init_config(struct r600_pipe_context *rctx)
 {
 	int ps_prio;
@@ -1167,6 +1207,9 @@ void r600_init_config(struct r600_pipe_context *rctx)
 		break;
 	}
 
+	rctx->default_ps_gprs = num_ps_gprs;
+	rctx->default_vs_gprs = num_vs_gprs;
+
 	rstate->id = R600_PIPE_STATE_CONFIG;
 
 	/* SQ_CONFIG */
diff --git a/src/gallium/drivers/r600/r600_state_common.c b/src/gallium/drivers/r600/r600_state_common.c
index a670ac02be2..1eb9389bade 100644
--- a/src/gallium/drivers/r600/r600_state_common.c
+++ b/src/gallium/drivers/r600/r600_state_common.c
@@ -273,8 +273,10 @@ void r600_bind_ps_shader(struct pipe_context *ctx, void *state)
 	if (state) {
 		r600_context_pipe_state_set(&rctx->ctx, &rctx->ps_shader->rstate);
 	}
-	if (rctx->ps_shader && rctx->vs_shader)
+	if (rctx->ps_shader && rctx->vs_shader) {
 		r600_spi_update(rctx);
+		r600_adjust_gprs(rctx);
+	}
 }
 
 void r600_bind_vs_shader(struct pipe_context *ctx, void *state)
@@ -286,8 +288,10 @@ void r600_bind_vs_shader(struct pipe_context *ctx, void *state)
 	if (state) {
 		r600_context_pipe_state_set(&rctx->ctx, &rctx->vs_shader->rstate);
 	}
-	if (rctx->ps_shader && rctx->vs_shader)
+	if (rctx->ps_shader && rctx->vs_shader) {
 		r600_spi_update(rctx);
+		r600_adjust_gprs(rctx);
+	}
 }
 
 void r600_delete_ps_shader(struct pipe_context *ctx, void *state)