45 	UUID_INIT(0xb638d70e, 0x42ff, 0x40bb,
46 		  0x97, 0xc2, 0x90, 0xe2, 0xc0, 0xb2, 0xff, 0x07);
85 	req->result.err = 0;  in tb_xdomain_copy()
114  * @xd: XDomain to send the message
122  * Return: %0 in case of success and negative errno in case of failure
124 int tb_xdomain_response(struct tb_xdomain *xd, const void *response,  in tb_xdomain_response()  argument
127 	return __tb_xdomain_response(xd->tb->ctl, response, size, type);  in tb_xdomain_response()
161  * @xd: XDomain to send the request
174  * Return: %0 in case of success and negative errno in case of failure
176 int tb_xdomain_request(struct tb_xdomain *xd, const void *request,  in tb_xdomain_request()  argument
181 	return __tb_xdomain_request(xd->tb->ctl, request, request_size,  in tb_xdomain_request()
207 		return 0;  in tb_xdp_handle_error()
223 	return 0;  in tb_xdp_handle_error()
233 	memset(&req, 0, sizeof(req));  in tb_xdp_uuid_request()
237 	memset(&res, 0, sizeof(res));  in tb_xdp_uuid_request()
250 	return 0;  in tb_xdp_uuid_request()
258 	memset(&res, 0, sizeof(res));  in tb_xdp_uuid_response()
275 	memset(&res, 0, sizeof(res));  in tb_xdp_error_response()
300 	memset(&req, 0, sizeof(req));  in tb_xdp_properties_request()
306 	len = 0;  in tb_xdp_properties_request()
307 	data_len = 0;  in tb_xdp_properties_request()
393 		return 0;  in tb_xdp_properties_response()
438 	memset(&req, 0, sizeof(req));  in tb_xdp_properties_changed_request()
443 	memset(&res, 0, sizeof(res));  in tb_xdp_properties_changed_request()
459 	memset(&res, 0, sizeof(res));  in tb_xdp_properties_changed_response()
486 	return 0;  in tb_register_protocol_handler()
512 	int ret = 0;  in tb_xdp_handle_request()
541 		struct tb_xdomain *xd;  in tb_xdp_handle_request()  local
550 		xd = tb_xdomain_find_by_uuid_locked(tb, &xchg->src_uuid);  in tb_xdp_handle_request()
551 		if (xd) {  in tb_xdp_handle_request()
552 			queue_delayed_work(tb->wq, &xd->get_properties_work,  in tb_xdp_handle_request()
554 			tb_xdomain_put(xd);  in tb_xdp_handle_request()
692 	return sprintf(buf, "0x%08x\n", svc->prtcstns);  in prtcstns_show()
727 	struct tb_xdomain *xd = tb_service_parent(svc);  in tb_service_release()  local
729 	ida_simple_remove(&xd->service_ids, svc->id);  in tb_service_release()
744 	struct tb_xdomain *xd = data;  in remove_missing_service()  local
749 		return 0;  in remove_missing_service()
751 	if (!tb_property_find(xd->properties, svc->key,  in remove_missing_service()
755 	return 0;  in remove_missing_service()
765 		return 0;  in find_service()
794 	return 0;  in populate_service()
797 static void enumerate_services(struct tb_xdomain *xd)  in enumerate_services()  argument
808 	device_for_each_child_reverse(&xd->dev, xd, remove_missing_service);  in enumerate_services()
811 	tb_property_for_each(xd->properties, p) {  in enumerate_services()
816 		dev = device_find_child(&xd->dev, p, find_service);  in enumerate_services()
831 		id = ida_simple_get(&xd->service_ids, 0, 0, GFP_KERNEL);  in enumerate_services()
832 		if (id < 0) {  in enumerate_services()
839 		svc->dev.parent = &xd->dev;  in enumerate_services()
840 		dev_set_name(&svc->dev, "%s.%d", dev_name(&xd->dev), svc->id);  in enumerate_services()
849 static int populate_properties(struct tb_xdomain *xd,  in populate_properties()  argument
858 	xd->device = p->value.immediate;  in populate_properties()
863 	xd->vendor = p->value.immediate;  in populate_properties()
865 	kfree(xd->device_name);  in populate_properties()
866 	xd->device_name = NULL;  in populate_properties()
867 	kfree(xd->vendor_name);  in populate_properties()
868 	xd->vendor_name = NULL;  in populate_properties()
873 		xd->device_name = kstrdup(p->value.text, GFP_KERNEL);  in populate_properties()
876 		xd->vendor_name = kstrdup(p->value.text, GFP_KERNEL);  in populate_properties()
878 	return 0;  in populate_properties()
881 /* Called with @xd->lock held */
882 static void tb_xdomain_restore_paths(struct tb_xdomain *xd)  in tb_xdomain_restore_paths()  argument
884 	if (!xd->resume)  in tb_xdomain_restore_paths()
887 	xd->resume = false;  in tb_xdomain_restore_paths()
888 	if (xd->transmit_path) {  in tb_xdomain_restore_paths()
889 		dev_dbg(&xd->dev, "re-establishing DMA path\n");  in tb_xdomain_restore_paths()
890 		tb_domain_approve_xdomain_paths(xd->tb, xd);  in tb_xdomain_restore_paths()
896 	struct tb_xdomain *xd = container_of(work, typeof(*xd),  in tb_xdomain_get_uuid()  local
898 	struct tb *tb = xd->tb;  in tb_xdomain_get_uuid()
902 	ret = tb_xdp_uuid_request(tb->ctl, xd->route, xd->uuid_retries, &uuid);  in tb_xdomain_get_uuid()
903 	if (ret < 0) {  in tb_xdomain_get_uuid()
904 		if (xd->uuid_retries-- > 0) {  in tb_xdomain_get_uuid()
905 			queue_delayed_work(xd->tb->wq, &xd->get_uuid_work,  in tb_xdomain_get_uuid()
908 			dev_dbg(&xd->dev, "failed to read remote UUID\n");  in tb_xdomain_get_uuid()
913 	if (uuid_equal(&uuid, xd->local_uuid)) {  in tb_xdomain_get_uuid()
914 		dev_dbg(&xd->dev, "intra-domain loop detected\n");  in tb_xdomain_get_uuid()
923 	if (xd->remote_uuid && !uuid_equal(&uuid, xd->remote_uuid)) {  in tb_xdomain_get_uuid()
924 		dev_dbg(&xd->dev, "remote UUID is different, unplugging\n");  in tb_xdomain_get_uuid()
925 		xd->is_unplugged = true;  in tb_xdomain_get_uuid()
930 	if (!xd->remote_uuid) {  in tb_xdomain_get_uuid()
931 		xd->remote_uuid = kmemdup(&uuid, sizeof(uuid_t), GFP_KERNEL);  in tb_xdomain_get_uuid()
932 		if (!xd->remote_uuid)  in tb_xdomain_get_uuid()
937 	queue_delayed_work(xd->tb->wq, &xd->properties_changed_work,  in tb_xdomain_get_uuid()
939 	queue_delayed_work(xd->tb->wq, &xd->get_properties_work,  in tb_xdomain_get_uuid()
945 	struct tb_xdomain *xd = container_of(work, typeof(*xd),  in tb_xdomain_get_properties()  local
948 	struct tb *tb = xd->tb;  in tb_xdomain_get_properties()
951 	u32 gen = 0;  in tb_xdomain_get_properties()
954 	ret = tb_xdp_properties_request(tb->ctl, xd->route, xd->local_uuid,  in tb_xdomain_get_properties()
955 					xd->remote_uuid, xd->properties_retries,  in tb_xdomain_get_properties()
957 	if (ret < 0) {  in tb_xdomain_get_properties()
958 		if (xd->properties_retries-- > 0) {  in tb_xdomain_get_properties()
959 			queue_delayed_work(xd->tb->wq, &xd->get_properties_work,  in tb_xdomain_get_properties()
963 			dev_err(&xd->dev,  in tb_xdomain_get_properties()
965 				xd->remote_uuid);  in tb_xdomain_get_properties()
970 	xd->properties_retries = XDOMAIN_PROPERTIES_RETRIES;  in tb_xdomain_get_properties()
972 	mutex_lock(&xd->lock);  in tb_xdomain_get_properties()
975 	if (xd->properties && gen <= xd->property_block_gen) {  in tb_xdomain_get_properties()
982 		tb_xdomain_restore_paths(xd);  in tb_xdomain_get_properties()
988 		dev_err(&xd->dev, "failed to parse XDomain properties\n");  in tb_xdomain_get_properties()
992 	ret = populate_properties(xd, dir);  in tb_xdomain_get_properties()
994 		dev_err(&xd->dev, "missing XDomain properties in response\n");  in tb_xdomain_get_properties()
999 	if (xd->properties) {  in tb_xdomain_get_properties()
1000 		tb_property_free_dir(xd->properties);  in tb_xdomain_get_properties()
1004 	xd->properties = dir;  in tb_xdomain_get_properties()
1005 	xd->property_block_gen = gen;  in tb_xdomain_get_properties()
1007 	tb_xdomain_restore_paths(xd);  in tb_xdomain_get_properties()
1009 	mutex_unlock(&xd->lock);  in tb_xdomain_get_properties()
1019 		if (device_add(&xd->dev)) {  in tb_xdomain_get_properties()
1020 			dev_err(&xd->dev, "failed to add XDomain device\n");  in tb_xdomain_get_properties()
1024 		kobject_uevent(&xd->dev.kobj, KOBJ_CHANGE);  in tb_xdomain_get_properties()
1027 	enumerate_services(xd);  in tb_xdomain_get_properties()
1034 	mutex_unlock(&xd->lock);  in tb_xdomain_get_properties()
1039 	struct tb_xdomain *xd = container_of(work, typeof(*xd),  in tb_xdomain_properties_changed()  local
1043 	ret = tb_xdp_properties_changed_request(xd->tb->ctl, xd->route,  in tb_xdomain_properties_changed()
1044 				xd->properties_changed_retries, xd->local_uuid);  in tb_xdomain_properties_changed()
1046 		if (xd->properties_changed_retries-- > 0)  in tb_xdomain_properties_changed()
1047 			queue_delayed_work(xd->tb->wq,  in tb_xdomain_properties_changed()
1048 					   &xd->properties_changed_work,  in tb_xdomain_properties_changed()
1053 	xd->properties_changed_retries = XDOMAIN_PROPERTIES_CHANGED_RETRIES;  in tb_xdomain_properties_changed()
1059 	struct tb_xdomain *xd = container_of(dev, struct tb_xdomain, dev);  in device_show()  local
1061 	return sprintf(buf, "%#x\n", xd->device);  in device_show()
1068 	struct tb_xdomain *xd = container_of(dev, struct tb_xdomain, dev);  in device_name_show()  local
1071 	if (mutex_lock_interruptible(&xd->lock))  in device_name_show()
1073 	ret = sprintf(buf, "%s\n", xd->device_name ? xd->device_name : "");  in device_name_show()
1074 	mutex_unlock(&xd->lock);  in device_name_show()
1083 	struct tb_xdomain *xd = container_of(dev, struct tb_xdomain, dev);  in vendor_show()  local
1085 	return sprintf(buf, "%#x\n", xd->vendor);  in vendor_show()
1092 	struct tb_xdomain *xd = container_of(dev, struct tb_xdomain, dev);  in vendor_name_show()  local
1095 	if (mutex_lock_interruptible(&xd->lock))  in vendor_name_show()
1097 	ret = sprintf(buf, "%s\n", xd->vendor_name ? xd->vendor_name : "");  in vendor_name_show()
1098 	mutex_unlock(&xd->lock);  in vendor_name_show()
1107 	struct tb_xdomain *xd = container_of(dev, struct tb_xdomain, dev);  in unique_id_show()  local
1109 	return sprintf(buf, "%pUb\n", xd->remote_uuid);  in unique_id_show()
1133 	struct tb_xdomain *xd = container_of(dev, struct tb_xdomain, dev);  in tb_xdomain_release()  local
1135 	put_device(xd->dev.parent);  in tb_xdomain_release()
1137 	tb_property_free_dir(xd->properties);  in tb_xdomain_release()
1138 	ida_destroy(&xd->service_ids);  in tb_xdomain_release()
1140 	kfree(xd->local_uuid);  in tb_xdomain_release()
1141 	kfree(xd->remote_uuid);  in tb_xdomain_release()
1142 	kfree(xd->device_name);  in tb_xdomain_release()
1143 	kfree(xd->vendor_name);  in tb_xdomain_release()
1144 	kfree(xd);  in tb_xdomain_release()
1147 static void start_handshake(struct tb_xdomain *xd)  in start_handshake()  argument
1149 	xd->uuid_retries = XDOMAIN_UUID_RETRIES;  in start_handshake()
1150 	xd->properties_retries = XDOMAIN_PROPERTIES_RETRIES;  in start_handshake()
1151 	xd->properties_changed_retries = XDOMAIN_PROPERTIES_CHANGED_RETRIES;  in start_handshake()
1153 	if (xd->needs_uuid) {  in start_handshake()
1154 		queue_delayed_work(xd->tb->wq, &xd->get_uuid_work,  in start_handshake()
1158 		queue_delayed_work(xd->tb->wq, &xd->properties_changed_work,  in start_handshake()
1160 		queue_delayed_work(xd->tb->wq, &xd->get_properties_work,  in start_handshake()
1165 static void stop_handshake(struct tb_xdomain *xd)  in stop_handshake()  argument
1167 	xd->uuid_retries = 0;  in stop_handshake()
1168 	xd->properties_retries = 0;  in stop_handshake()
1169 	xd->properties_changed_retries = 0;  in stop_handshake()
1171 	cancel_delayed_work_sync(&xd->get_uuid_work);  in stop_handshake()
1172 	cancel_delayed_work_sync(&xd->get_properties_work);  in stop_handshake()
1173 	cancel_delayed_work_sync(&xd->properties_changed_work);  in stop_handshake()
1179 	return 0;  in tb_xdomain_suspend()
1184 	struct tb_xdomain *xd = tb_to_xdomain(dev);  in tb_xdomain_resume()  local
1190 	xd->resume = true;  in tb_xdomain_resume()
1191 	start_handshake(xd);  in tb_xdomain_resume()
1193 	return 0;  in tb_xdomain_resume()
1223 	struct tb_xdomain *xd;  in tb_xdomain_alloc()  local
1225 	xd = kzalloc(sizeof(*xd), GFP_KERNEL);  in tb_xdomain_alloc()
1226 	if (!xd)  in tb_xdomain_alloc()
1229 	xd->tb = tb;  in tb_xdomain_alloc()
1230 	xd->route = route;  in tb_xdomain_alloc()
1231 	ida_init(&xd->service_ids);  in tb_xdomain_alloc()
1232 	mutex_init(&xd->lock);  in tb_xdomain_alloc()
1233 	INIT_DELAYED_WORK(&xd->get_uuid_work, tb_xdomain_get_uuid);  in tb_xdomain_alloc()
1234 	INIT_DELAYED_WORK(&xd->get_properties_work, tb_xdomain_get_properties);  in tb_xdomain_alloc()
1235 	INIT_DELAYED_WORK(&xd->properties_changed_work,  in tb_xdomain_alloc()
1238 	xd->local_uuid = kmemdup(local_uuid, sizeof(uuid_t), GFP_KERNEL);  in tb_xdomain_alloc()
1239 	if (!xd->local_uuid)  in tb_xdomain_alloc()
1243 		xd->remote_uuid = kmemdup(remote_uuid, sizeof(uuid_t),  in tb_xdomain_alloc()
1245 		if (!xd->remote_uuid)  in tb_xdomain_alloc()
1248 		xd->needs_uuid = true;  in tb_xdomain_alloc()
1251 	device_initialize(&xd->dev);  in tb_xdomain_alloc()
1252 	xd->dev.parent = get_device(parent);  in tb_xdomain_alloc()
1253 	xd->dev.bus = &tb_bus_type;  in tb_xdomain_alloc()
1254 	xd->dev.type = &tb_xdomain_type;  in tb_xdomain_alloc()
1255 	xd->dev.groups = xdomain_attr_groups;  in tb_xdomain_alloc()
1256 	dev_set_name(&xd->dev, "%u-%llx", tb->index, route);  in tb_xdomain_alloc()
1262 	pm_runtime_set_active(&xd->dev);  in tb_xdomain_alloc()
1263 	pm_runtime_get_noresume(&xd->dev);  in tb_xdomain_alloc()
1264 	pm_runtime_enable(&xd->dev);  in tb_xdomain_alloc()
1266 	return xd;  in tb_xdomain_alloc()
1269 	kfree(xd->local_uuid);  in tb_xdomain_alloc()
1271 	kfree(xd);  in tb_xdomain_alloc()
1278  * @xd: XDomain to add
1285 void tb_xdomain_add(struct tb_xdomain *xd)  in tb_xdomain_add()  argument
1288 	start_handshake(xd);  in tb_xdomain_add()
1294 	return 0;  in unregister_service()
1299  * @xd: XDomain to remove
1302  * along with any services from the bus. When the last reference to @xd
1305 void tb_xdomain_remove(struct tb_xdomain *xd)  in tb_xdomain_remove()  argument
1307 	stop_handshake(xd);  in tb_xdomain_remove()
1309 	device_for_each_child_reverse(&xd->dev, xd, unregister_service);  in tb_xdomain_remove()
1316 	pm_runtime_disable(&xd->dev);  in tb_xdomain_remove()
1317 	pm_runtime_put_noidle(&xd->dev);  in tb_xdomain_remove()
1318 	pm_runtime_set_suspended(&xd->dev);  in tb_xdomain_remove()
1320 	if (!device_is_registered(&xd->dev))  in tb_xdomain_remove()
1321 		put_device(&xd->dev);  in tb_xdomain_remove()
1323 		device_unregister(&xd->dev);  in tb_xdomain_remove()
1328  * @xd: XDomain connection
1340  * Return: %0 in case of success and negative errno in case of error
1342 int tb_xdomain_enable_paths(struct tb_xdomain *xd, u16 transmit_path,  in tb_xdomain_enable_paths()  argument
1348 	mutex_lock(&xd->lock);  in tb_xdomain_enable_paths()
1350 	if (xd->transmit_path) {  in tb_xdomain_enable_paths()
1351 		ret = xd->transmit_path == transmit_path ? 0 : -EBUSY;  in tb_xdomain_enable_paths()
1355 	xd->transmit_path = transmit_path;  in tb_xdomain_enable_paths()
1356 	xd->transmit_ring = transmit_ring;  in tb_xdomain_enable_paths()
1357 	xd->receive_path = receive_path;  in tb_xdomain_enable_paths()
1358 	xd->receive_ring = receive_ring;  in tb_xdomain_enable_paths()
1360 	ret = tb_domain_approve_xdomain_paths(xd->tb, xd);  in tb_xdomain_enable_paths()
1363 	mutex_unlock(&xd->lock);  in tb_xdomain_enable_paths()
1371  * @xd: XDomain connection
1376  * Return: %0 in case of success and negative errno in case of error
1378 int tb_xdomain_disable_paths(struct tb_xdomain *xd)  in tb_xdomain_disable_paths()  argument
1380 	int ret = 0;  in tb_xdomain_disable_paths()
1382 	mutex_lock(&xd->lock);  in tb_xdomain_disable_paths()
1383 	if (xd->transmit_path) {  in tb_xdomain_disable_paths()
1384 		xd->transmit_path = 0;  in tb_xdomain_disable_paths()
1385 		xd->transmit_ring = 0;  in tb_xdomain_disable_paths()
1386 		xd->receive_path = 0;  in tb_xdomain_disable_paths()
1387 		xd->receive_ring = 0;  in tb_xdomain_disable_paths()
1389 		ret = tb_domain_disconnect_xdomain_paths(xd->tb, xd);  in tb_xdomain_disable_paths()
1391 	mutex_unlock(&xd->lock);  in tb_xdomain_disable_paths()
1411 		struct tb_xdomain *xd;  in switch_find_xdomain()  local
1414 			xd = port->xdomain;  in switch_find_xdomain()
1417 				if (xd->remote_uuid &&  in switch_find_xdomain()
1418 				    uuid_equal(xd->remote_uuid, lookup->uuid))  in switch_find_xdomain()
1419 					return xd;  in switch_find_xdomain()
1421 				   lookup->link == xd->link &&  in switch_find_xdomain()
1422 				   lookup->depth == xd->depth) {  in switch_find_xdomain()
1423 				return xd;  in switch_find_xdomain()
1425 				   lookup->route == xd->route) {  in switch_find_xdomain()
1426 				return xd;  in switch_find_xdomain()
1429 			xd = switch_find_xdomain(port->remote->sw, lookup);  in switch_find_xdomain()
1430 			if (xd)  in switch_find_xdomain()
1431 				return xd;  in switch_find_xdomain()
1456 	struct tb_xdomain *xd;  in tb_xdomain_find_by_uuid()  local
1458 	memset(&lookup, 0, sizeof(lookup));  in tb_xdomain_find_by_uuid()
1461 	xd = switch_find_xdomain(tb->root_switch, &lookup);  in tb_xdomain_find_by_uuid()
1462 	return tb_xdomain_get(xd);  in tb_xdomain_find_by_uuid()
1486 	struct tb_xdomain *xd;  in tb_xdomain_find_by_link_depth()  local
1488 	memset(&lookup, 0, sizeof(lookup));  in tb_xdomain_find_by_link_depth()
1492 	xd = switch_find_xdomain(tb->root_switch, &lookup);  in tb_xdomain_find_by_link_depth()
1493 	return tb_xdomain_get(xd);  in tb_xdomain_find_by_link_depth()
1514 	struct tb_xdomain *xd;  in tb_xdomain_find_by_route()  local
1516 	memset(&lookup, 0, sizeof(lookup));  in tb_xdomain_find_by_route()
1519 	xd = switch_find_xdomain(tb->root_switch, &lookup);  in tb_xdomain_find_by_route()
1520 	return tb_xdomain_get(xd);  in tb_xdomain_find_by_route()
1530 	int ret = 0;  in tb_xdomain_handle_request()
1564 	return ret > 0;  in tb_xdomain_handle_request()
1572 	ret = tb_property_format_dir(xdomain_property_dir, NULL, 0);  in rebuild_property_block()
1573 	if (ret < 0)  in rebuild_property_block()
1593 	return 0;  in rebuild_property_block()
1598 	struct tb_xdomain *xd;  in update_xdomain()  local
1600 	xd = tb_to_xdomain(dev);  in update_xdomain()
1601 	if (xd) {  in update_xdomain()
1602 		queue_delayed_work(xd->tb->wq, &xd->properties_changed_work,  in update_xdomain()
1606 	return 0;  in update_xdomain()
1637  * Return: %0 on success and negative errno on failure
1668 	return 0;  in tb_register_property_dir()
1686 	int ret = 0;  in tb_unregister_property_dir()
1714 	tb_property_add_immediate(xdomain_property_dir, "deviceid", 0x1);  in tb_xdomain_init()
1717 	tb_property_add_immediate(xdomain_property_dir, "devicerv", 0x80000100);  in tb_xdomain_init()