radeonsi: flush if the memory usage for an IB is too high

Picked from the amdgpu branch.

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>

src/gallium/drivers/radeonsi/si_hw_context.c

@@ -32,6 +32,19 @@ void si_need_cs_space(struct si_context *ctx, unsigned num_dw,
 {
 	int i;
 
+	/* There are two memory usage counters in the winsys for all buffers
+	 * that have been added (cs_add_reloc) and two counters in the pipe
+	 * driver for those that haven't been added yet.
+	 * */
+	if (!ctx->b.ws->cs_memory_below_limit(ctx->b.rings.gfx.cs, ctx->b.vram, ctx->b.gtt)) {
+		ctx->b.gtt = 0;
+		ctx->b.vram = 0;
+		ctx->b.rings.gfx.flush(ctx, RADEON_FLUSH_ASYNC, NULL);
+		return;
+	}
+	ctx->b.gtt = 0;
+	ctx->b.vram = 0;
+
 	/* The number of dwords we already used in the CS so far. */
 	num_dw += ctx->b.rings.gfx.cs->cdw;
 

src/gallium/drivers/radeonsi/si_state.c

@@ -2059,6 +2059,7 @@ static void si_set_framebuffer_state(struct pipe_context *ctx,
 		if (rtex->fmask.size && rtex->cmask.size) {
 			sctx->framebuffer.compressed_cb_mask |= 1 << i;
 		}
+		r600_context_add_resource_size(ctx, surf->base.texture);
 	}
 	/* Set the 16BPC export for possible dual-src blending. */
 	if (i == 1 && surf && surf->export_16bpc) {
@@ -2073,6 +2074,7 @@ static void si_set_framebuffer_state(struct pipe_context *ctx,
 		if (!surf->depth_initialized) {
 			si_init_depth_surface(sctx, surf);
 		}
+		r600_context_add_resource_size(ctx, surf->base.texture);
 	}
 
 	si_update_fb_rs_state(sctx);
@@ -2815,6 +2817,7 @@ static void si_set_vertex_buffers(struct pipe_context *ctx,
 			pipe_resource_reference(&dsti->buffer, src->buffer);
 			dsti->buffer_offset = src->buffer_offset;
 			dsti->stride = src->stride;
+			r600_context_add_resource_size(ctx, src->buffer);
 		}
 	} else {
 		for (i = 0; i < count; i++) {
@@ -2832,6 +2835,7 @@ static void si_set_index_buffer(struct pipe_context *ctx,
 	if (ib) {
 		pipe_resource_reference(&sctx->index_buffer.buffer, ib->buffer);
 	        memcpy(&sctx->index_buffer, ib, sizeof(*ib));
+		r600_context_add_resource_size(ctx, ib->buffer);
 	} else {
 		pipe_resource_reference(&sctx->index_buffer.buffer, NULL);
 	}