r600g: implement invalidation of texture buffer objects

This fixes piglit spec/ARB_texture_buffer_object/data-sync.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

src/gallium/drivers/r600/evergreen_state.c

@@ -596,7 +596,8 @@ static void *evergreen_create_sampler_state(struct pipe_context *ctx,
 }
 
 static struct pipe_sampler_view *
-texture_buffer_sampler_view(struct r600_pipe_sampler_view *view,
+texture_buffer_sampler_view(struct r600_context *rctx,
+			    struct r600_pipe_sampler_view *view,
 			    unsigned width0, unsigned height0)
 			    
 {
@@ -644,6 +645,9 @@ texture_buffer_sampler_view(struct r600_pipe_sampler_view *view,
 	view->tex_resource_words[4] = 0;
 	view->tex_resource_words[5] = view->tex_resource_words[6] = 0;
 	view->tex_resource_words[7] = S_03001C_TYPE(V_03001C_SQ_TEX_VTX_VALID_BUFFER);
+
+	if (tmp->resource.gpu_address)
+		LIST_ADDTAIL(&view->list, &rctx->b.texture_buffers);
 	return &view->base;
 }
 
@@ -654,6 +658,7 @@ evergreen_create_sampler_view_custom(struct pipe_context *ctx,
 				     unsigned width0, unsigned height0,
 				     unsigned force_level)
 {
+	struct r600_context *rctx = (struct r600_context*)ctx;
 	struct r600_screen *rscreen = (struct r600_screen*)ctx->screen;
 	struct r600_pipe_sampler_view *view = CALLOC_STRUCT(r600_pipe_sampler_view);
 	struct r600_texture *tmp = (struct r600_texture*)texture;
@@ -679,7 +684,7 @@ evergreen_create_sampler_view_custom(struct pipe_context *ctx,
 	view->base.context = ctx;
 
 	if (texture->target == PIPE_BUFFER)
-		return texture_buffer_sampler_view(view, width0, height0);
+		return texture_buffer_sampler_view(rctx, view, width0, height0);
 
 	swizzle[0] = state->swizzle_r;
 	swizzle[1] = state->swizzle_g;

src/gallium/drivers/r600/r600_pipe.h

@@ -222,6 +222,7 @@ struct r600_screen {
 
 struct r600_pipe_sampler_view {
 	struct pipe_sampler_view	base;
+	struct list_head		list;
 	struct r600_resource		*tex_resource;
 	uint32_t			tex_resource_words[8];
 	bool				skip_mip_address_reloc;

src/gallium/drivers/r600/r600_state_common.c

@@ -354,10 +354,14 @@ static void r600_delete_rs_state(struct pipe_context *ctx, void *state)
 static void r600_sampler_view_destroy(struct pipe_context *ctx,
 				      struct pipe_sampler_view *state)
 {
-	struct r600_pipe_sampler_view *resource = (struct r600_pipe_sampler_view *)state;
+	struct r600_pipe_sampler_view *view = (struct r600_pipe_sampler_view *)state;
+
+	if (view->tex_resource->gpu_address &&
+	    view->tex_resource->b.b.target == PIPE_BUFFER)
+		LIST_DELINIT(&view->list);
 
 	pipe_resource_reference(&state->texture, NULL);
-	FREE(resource);
+	FREE(view);
 }
 
 void r600_sampler_states_dirty(struct r600_context *rctx,
@@ -2314,6 +2318,7 @@ static void r600_invalidate_buffer(struct pipe_context *ctx, struct pipe_resourc
 	struct r600_context *rctx = (struct r600_context*)ctx;
 	struct r600_resource *rbuffer = r600_resource(buf);
 	unsigned i, shader, mask, alignment = rbuffer->buf->alignment;
+	struct r600_pipe_sampler_view *view;
 
 	/* Reallocate the buffer in the same pipe_resource. */
 	r600_init_resource(&rctx->screen->b, rbuffer, rbuffer->b.b.width0,
@@ -2358,7 +2363,35 @@ static void r600_invalidate_buffer(struct pipe_context *ctx, struct pipe_resourc
 		}
 	}
 
-	/* XXX TODO: texture buffer objects */
+	/* Texture buffer objects - update the virtual addresses in descriptors. */
+	LIST_FOR_EACH_ENTRY(view, &rctx->b.texture_buffers, list) {
+		if (view->base.texture == &rbuffer->b.b) {
+			unsigned stride = util_format_get_blocksize(view->base.format);
+			uint64_t offset = (uint64_t)view->base.u.buf.first_element * stride;
+			uint64_t va = rbuffer->gpu_address + offset;
+
+			view->tex_resource_words[0] = va;
+			view->tex_resource_words[2] &= C_038008_BASE_ADDRESS_HI;
+			view->tex_resource_words[2] |= S_038008_BASE_ADDRESS_HI(va >> 32);
+		}
+	}
+	/* Texture buffer objects - make bindings dirty if needed. */
+	for (shader = 0; shader < PIPE_SHADER_TYPES; shader++) {
+		struct r600_samplerview_state *state = &rctx->samplers[shader].views;
+		bool found = false;
+		uint32_t mask = state->enabled_mask;
+
+		while (mask) {
+			unsigned i = u_bit_scan(&mask);
+			if (state->views[i]->base.texture == &rbuffer->b.b) {
+				found = true;
+				state->dirty_mask |= 1 << i;
+			}
+		}
+		if (found) {
+			r600_sampler_views_dirty(rctx, state);
+		}
+	}
 }
 
 static void r600_set_occlusion_query_state(struct pipe_context *ctx, bool enable)

src/gallium/drivers/radeon/r600_pipe_common.c

@@ -157,6 +157,8 @@ bool r600_common_context_init(struct r600_common_context *rctx,
         rctx->b.memory_barrier = r600_memory_barrier;
 	rctx->b.flush = r600_flush_from_st;
 
+	LIST_INITHEAD(&rctx->texture_buffers);
+
 	r600_init_context_texture_functions(rctx);
 	r600_streamout_init(rctx);
 	r600_query_init(rctx);

src/gallium/drivers/radeon/r600_pipe_common.h

@@ -375,6 +375,11 @@ struct r600_common_context {
 	float				sample_locations_8x[8][2];
 	float				sample_locations_16x[16][2];
 
+	/* The list of all texture buffer objects in this context.
+	 * This list is walked when a buffer is invalidated/reallocated and
+	 * the GPU addresses are updated. */
+	struct list_head		texture_buffers;
+
 	/* Copy one resource to another using async DMA. */
 	void (*dma_copy)(struct pipe_context *ctx,
 			 struct pipe_resource *dst,