+static bool
+intel_set_texture_storage_for_buffer_object(struct gl_context *ctx,
+ struct gl_texture_object *tex_obj,
+ struct gl_buffer_object *buffer_obj,
+ uint32_t buffer_offset,
+ uint32_t row_stride,
+ bool read_only)
+{
+ struct brw_context *brw = brw_context(ctx);
+ struct intel_texture_object *intel_texobj = intel_texture_object(tex_obj);
+ struct gl_texture_image *image = tex_obj->Image[0][0];
+ struct intel_texture_image *intel_image = intel_texture_image(image);
+ struct intel_buffer_object *intel_buffer_obj = intel_buffer_object(buffer_obj);
+
+ if (!read_only) {
+ /* Renderbuffers have the restriction that the buffer offset and
+ * surface pitch must be a multiple of the element size. If it's
+ * not, we have to fail and fall back to software.
+ */
+ int cpp = _mesa_get_format_bytes(image->TexFormat);
+ if (buffer_offset % cpp || row_stride % cpp) {
+ perf_debug("Bad PBO alignment; fallback to CPU mapping\n");
+ return false;
+ }
+
+ if (!brw->mesa_format_supports_render[image->TexFormat]) {
+ perf_debug("Non-renderable PBO format; fallback to CPU mapping\n");
+ return false;
+ }
+ }
+
+ assert(intel_texobj->mt == NULL);
+
+ struct brw_bo *bo = intel_bufferobj_buffer(brw, intel_buffer_obj,
+ buffer_offset,
+ row_stride * image->Height,
+ !read_only);
+ intel_texobj->mt =
+ intel_miptree_create_for_bo(brw, bo,
+ image->TexFormat,
+ buffer_offset,
+ image->Width, image->Height, image->Depth,
+ row_stride,
+ 0);
+ if (!intel_texobj->mt)
+ return false;
+
+ if (!_swrast_init_texture_image(image))
+ return false;
+
+ intel_miptree_reference(&intel_image->mt, intel_texobj->mt);
+
+ /* The miptree is in a validated state, so no need to check later. */
+ intel_texobj->needs_validate = false;
+ intel_texobj->validated_first_level = 0;
+ intel_texobj->validated_last_level = 0;
+ intel_texobj->_Format = intel_texobj->mt->format;
+
+ return true;
+}
+
+static void
+intel_texture_barrier(struct gl_context *ctx)
+{
+ struct brw_context *brw = brw_context(ctx);
+
+ if (brw->gen >= 6) {
+ brw_emit_pipe_control_flush(brw,
+ PIPE_CONTROL_DEPTH_CACHE_FLUSH |
+ PIPE_CONTROL_RENDER_TARGET_FLUSH |
+ PIPE_CONTROL_CS_STALL);
+
+ brw_emit_pipe_control_flush(brw,
+ PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE);
+ } else {
+ brw_emit_mi_flush(brw);
+ }
+}
+