radeonsi: add assertions to prevent creation of invalid surfaces

[ Cherry-picked from r600g commit ef11ed61a0 ]

NOTE: This is a candidate for the 9.1 branch.

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

src/gallium/drivers/radeonsi/r600_blit.c

@@ -98,21 +98,6 @@ static void r600_blitter_end(struct pipe_context *ctx)
 	r600_context_queries_resume(rctx);
 }
 
-static unsigned u_max_layer(struct pipe_resource *r, unsigned level)
-{
-	switch (r->target) {
-	case PIPE_TEXTURE_CUBE:
-		return 6 - 1;
-	case PIPE_TEXTURE_3D:
-		return u_minify(r->depth0, level) - 1;
-	case PIPE_TEXTURE_1D_ARRAY:
-	case PIPE_TEXTURE_2D_ARRAY:
-		return r->array_size - 1;
-	default:
-		return 0;
-	}
-}
-
 void si_blit_uncompress_depth(struct pipe_context *ctx,
 		struct r600_resource_texture *texture,
 		struct r600_resource_texture *staging,

src/gallium/drivers/radeonsi/r600_texture.c

@@ -545,6 +545,8 @@ static struct pipe_surface *r600_create_surface(struct pipe_context *pipe,
 	struct r600_surface *surface = CALLOC_STRUCT(r600_surface);
 	unsigned level = surf_tmpl->u.tex.level;
 
+	assert(surf_tmpl->u.tex.first_layer <= u_max_layer(texture, surf_tmpl->u.tex.level));
+	assert(surf_tmpl->u.tex.last_layer <= u_max_layer(texture, surf_tmpl->u.tex.level));
 	assert(surf_tmpl->u.tex.first_layer == surf_tmpl->u.tex.last_layer);
 	if (surface == NULL)
 		return NULL;

src/gallium/drivers/radeonsi/radeonsi_pipe.h

@@ -277,4 +277,20 @@ static INLINE uint64_t r600_resource_va(struct pipe_screen *screen, struct pipe_
 	return rscreen->ws->buffer_get_virtual_address(rresource->cs_buf);
 }
 
+static INLINE unsigned u_max_layer(struct pipe_resource *r, unsigned level)
+{
+	switch (r->target) {
+	case PIPE_TEXTURE_CUBE:
+		return 6 - 1;
+	case PIPE_TEXTURE_3D:
+		return u_minify(r->depth0, level) - 1;
+	case PIPE_TEXTURE_1D_ARRAY:
+	case PIPE_TEXTURE_2D_ARRAY:
+	case PIPE_TEXTURE_CUBE_ARRAY:
+		return r->array_size - 1;
+	default:
+		return 0;
+	}
+}
+
 #endif