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()
509 	ret = tb_property_format_dir(xdomain_property_dir, NULL, 0);  in rebuild_property_block()
510 	if (ret < 0)  in rebuild_property_block()
530 	return 0;  in rebuild_property_block()
561 	int ret = 0;  in tb_xdp_handle_request()
592 		struct tb_xdomain *xd;  in tb_xdp_handle_request()  local
601 		xd = tb_xdomain_find_by_uuid_locked(tb, &xchg->src_uuid);  in tb_xdp_handle_request()
602 		if (xd) {  in tb_xdp_handle_request()
603 			queue_delayed_work(tb->wq, &xd->get_properties_work,  in tb_xdp_handle_request()
605 			tb_xdomain_put(xd);  in tb_xdp_handle_request()
743 	return sprintf(buf, "0x%08x\n", svc->prtcstns);  in prtcstns_show()
778 	struct tb_xdomain *xd = tb_service_parent(svc);  in tb_service_release()  local
780 	ida_simple_remove(&xd->service_ids, svc->id);  in tb_service_release()
795 	struct tb_xdomain *xd = data;  in remove_missing_service()  local
800 		return 0;  in remove_missing_service()
802 	if (!tb_property_find(xd->properties, svc->key,  in remove_missing_service()
806 	return 0;  in remove_missing_service()
816 		return 0;  in find_service()
845 	return 0;  in populate_service()
848 static void enumerate_services(struct tb_xdomain *xd)  in enumerate_services()  argument
859 	device_for_each_child_reverse(&xd->dev, xd, remove_missing_service);  in enumerate_services()
862 	tb_property_for_each(xd->properties, p) {  in enumerate_services()
867 		dev = device_find_child(&xd->dev, p, find_service);  in enumerate_services()
882 		id = ida_simple_get(&xd->service_ids, 0, 0, GFP_KERNEL);  in enumerate_services()
883 		if (id < 0) {  in enumerate_services()
891 		svc->dev.parent = &xd->dev;  in enumerate_services()
892 		dev_set_name(&svc->dev, "%s.%d", dev_name(&xd->dev), svc->id);  in enumerate_services()
901 static int populate_properties(struct tb_xdomain *xd,  in populate_properties()  argument
910 	xd->device = p->value.immediate;  in populate_properties()
915 	xd->vendor = p->value.immediate;  in populate_properties()
917 	kfree(xd->device_name);  in populate_properties()
918 	xd->device_name = NULL;  in populate_properties()
919 	kfree(xd->vendor_name);  in populate_properties()
920 	xd->vendor_name = NULL;  in populate_properties()
925 		xd->device_name = kstrdup(p->value.text, GFP_KERNEL);  in populate_properties()
928 		xd->vendor_name = kstrdup(p->value.text, GFP_KERNEL);  in populate_properties()
930 	return 0;  in populate_properties()
933 /* Called with @xd->lock held */
934 static void tb_xdomain_restore_paths(struct tb_xdomain *xd)  in tb_xdomain_restore_paths()  argument
936 	if (!xd->resume)  in tb_xdomain_restore_paths()
939 	xd->resume = false;  in tb_xdomain_restore_paths()
940 	if (xd->transmit_path) {  in tb_xdomain_restore_paths()
941 		dev_dbg(&xd->dev, "re-establishing DMA path\n");  in tb_xdomain_restore_paths()
942 		tb_domain_approve_xdomain_paths(xd->tb, xd);  in tb_xdomain_restore_paths()
948 	struct tb_xdomain *xd = container_of(work, typeof(*xd),  in tb_xdomain_get_uuid()  local
950 	struct tb *tb = xd->tb;  in tb_xdomain_get_uuid()
954 	ret = tb_xdp_uuid_request(tb->ctl, xd->route, xd->uuid_retries, &uuid);  in tb_xdomain_get_uuid()
955 	if (ret < 0) {  in tb_xdomain_get_uuid()
956 		if (xd->uuid_retries-- > 0) {  in tb_xdomain_get_uuid()
957 			queue_delayed_work(xd->tb->wq, &xd->get_uuid_work,  in tb_xdomain_get_uuid()
960 			dev_dbg(&xd->dev, "failed to read remote UUID\n");  in tb_xdomain_get_uuid()
965 	if (uuid_equal(&uuid, xd->local_uuid)) {  in tb_xdomain_get_uuid()
966 		dev_dbg(&xd->dev, "intra-domain loop detected\n");  in tb_xdomain_get_uuid()
975 	if (xd->remote_uuid && !uuid_equal(&uuid, xd->remote_uuid)) {  in tb_xdomain_get_uuid()
976 		dev_dbg(&xd->dev, "remote UUID is different, unplugging\n");  in tb_xdomain_get_uuid()
977 		xd->is_unplugged = true;  in tb_xdomain_get_uuid()
982 	if (!xd->remote_uuid) {  in tb_xdomain_get_uuid()
983 		xd->remote_uuid = kmemdup(&uuid, sizeof(uuid_t), GFP_KERNEL);  in tb_xdomain_get_uuid()
984 		if (!xd->remote_uuid)  in tb_xdomain_get_uuid()
989 	queue_delayed_work(xd->tb->wq, &xd->properties_changed_work,  in tb_xdomain_get_uuid()
991 	queue_delayed_work(xd->tb->wq, &xd->get_properties_work,  in tb_xdomain_get_uuid()
997 	struct tb_xdomain *xd = container_of(work, typeof(*xd),  in tb_xdomain_get_properties()  local
1000 	struct tb *tb = xd->tb;  in tb_xdomain_get_properties()
1003 	u32 gen = 0;  in tb_xdomain_get_properties()
1006 	ret = tb_xdp_properties_request(tb->ctl, xd->route, xd->local_uuid,  in tb_xdomain_get_properties()
1007 					xd->remote_uuid, xd->properties_retries,  in tb_xdomain_get_properties()
1009 	if (ret < 0) {  in tb_xdomain_get_properties()
1010 		if (xd->properties_retries-- > 0) {  in tb_xdomain_get_properties()
1011 			queue_delayed_work(xd->tb->wq, &xd->get_properties_work,  in tb_xdomain_get_properties()
1015 			dev_err(&xd->dev,  in tb_xdomain_get_properties()
1017 				xd->remote_uuid);  in tb_xdomain_get_properties()
1022 	xd->properties_retries = XDOMAIN_PROPERTIES_RETRIES;  in tb_xdomain_get_properties()
1024 	mutex_lock(&xd->lock);  in tb_xdomain_get_properties()
1027 	if (xd->properties && gen <= xd->property_block_gen) {  in tb_xdomain_get_properties()
1034 		tb_xdomain_restore_paths(xd);  in tb_xdomain_get_properties()
1040 		dev_err(&xd->dev, "failed to parse XDomain properties\n");  in tb_xdomain_get_properties()
1044 	ret = populate_properties(xd, dir);  in tb_xdomain_get_properties()
1046 		dev_err(&xd->dev, "missing XDomain properties in response\n");  in tb_xdomain_get_properties()
1051 	if (xd->properties) {  in tb_xdomain_get_properties()
1052 		tb_property_free_dir(xd->properties);  in tb_xdomain_get_properties()
1056 	xd->properties = dir;  in tb_xdomain_get_properties()
1057 	xd->property_block_gen = gen;  in tb_xdomain_get_properties()
1059 	tb_xdomain_restore_paths(xd);  in tb_xdomain_get_properties()
1061 	mutex_unlock(&xd->lock);  in tb_xdomain_get_properties()
1071 		if (device_add(&xd->dev)) {  in tb_xdomain_get_properties()
1072 			dev_err(&xd->dev, "failed to add XDomain device\n");  in tb_xdomain_get_properties()
1076 		kobject_uevent(&xd->dev.kobj, KOBJ_CHANGE);  in tb_xdomain_get_properties()
1079 	enumerate_services(xd);  in tb_xdomain_get_properties()
1086 	mutex_unlock(&xd->lock);  in tb_xdomain_get_properties()
1091 	struct tb_xdomain *xd = container_of(work, typeof(*xd),  in tb_xdomain_properties_changed()  local
1095 	ret = tb_xdp_properties_changed_request(xd->tb->ctl, xd->route,  in tb_xdomain_properties_changed()
1096 				xd->properties_changed_retries, xd->local_uuid);  in tb_xdomain_properties_changed()
1098 		if (xd->properties_changed_retries-- > 0)  in tb_xdomain_properties_changed()
1099 			queue_delayed_work(xd->tb->wq,  in tb_xdomain_properties_changed()
1100 					   &xd->properties_changed_work,  in tb_xdomain_properties_changed()
1105 	xd->properties_changed_retries = XDOMAIN_PROPERTIES_CHANGED_RETRIES;  in tb_xdomain_properties_changed()
1111 	struct tb_xdomain *xd = container_of(dev, struct tb_xdomain, dev);  in device_show()  local
1113 	return sprintf(buf, "%#x\n", xd->device);  in device_show()
1120 	struct tb_xdomain *xd = container_of(dev, struct tb_xdomain, dev);  in device_name_show()  local
1123 	if (mutex_lock_interruptible(&xd->lock))  in device_name_show()
1125 	ret = sprintf(buf, "%s\n", xd->device_name ? xd->device_name : "");  in device_name_show()
1126 	mutex_unlock(&xd->lock);  in device_name_show()
1135 	struct tb_xdomain *xd = container_of(dev, struct tb_xdomain, dev);  in vendor_show()  local
1137 	return sprintf(buf, "%#x\n", xd->vendor);  in vendor_show()
1144 	struct tb_xdomain *xd = container_of(dev, struct tb_xdomain, dev);  in vendor_name_show()  local
1147 	if (mutex_lock_interruptible(&xd->lock))  in vendor_name_show()
1149 	ret = sprintf(buf, "%s\n", xd->vendor_name ? xd->vendor_name : "");  in vendor_name_show()
1150 	mutex_unlock(&xd->lock);  in vendor_name_show()
1159 	struct tb_xdomain *xd = container_of(dev, struct tb_xdomain, dev);  in unique_id_show()  local
1161 	return sprintf(buf, "%pUb\n", xd->remote_uuid);  in unique_id_show()
1185 	struct tb_xdomain *xd = container_of(dev, struct tb_xdomain, dev);  in tb_xdomain_release()  local
1187 	put_device(xd->dev.parent);  in tb_xdomain_release()
1189 	tb_property_free_dir(xd->properties);  in tb_xdomain_release()
1190 	ida_destroy(&xd->service_ids);  in tb_xdomain_release()
1192 	kfree(xd->local_uuid);  in tb_xdomain_release()
1193 	kfree(xd->remote_uuid);  in tb_xdomain_release()
1194 	kfree(xd->device_name);  in tb_xdomain_release()
1195 	kfree(xd->vendor_name);  in tb_xdomain_release()
1196 	kfree(xd);  in tb_xdomain_release()
1199 static void start_handshake(struct tb_xdomain *xd)  in start_handshake()  argument
1201 	xd->uuid_retries = XDOMAIN_UUID_RETRIES;  in start_handshake()
1202 	xd->properties_retries = XDOMAIN_PROPERTIES_RETRIES;  in start_handshake()
1203 	xd->properties_changed_retries = XDOMAIN_PROPERTIES_CHANGED_RETRIES;  in start_handshake()
1205 	if (xd->needs_uuid) {  in start_handshake()
1206 		queue_delayed_work(xd->tb->wq, &xd->get_uuid_work,  in start_handshake()
1210 		queue_delayed_work(xd->tb->wq, &xd->properties_changed_work,  in start_handshake()
1212 		queue_delayed_work(xd->tb->wq, &xd->get_properties_work,  in start_handshake()
1217 static void stop_handshake(struct tb_xdomain *xd)  in stop_handshake()  argument
1219 	xd->uuid_retries = 0;  in stop_handshake()
1220 	xd->properties_retries = 0;  in stop_handshake()
1221 	xd->properties_changed_retries = 0;  in stop_handshake()
1223 	cancel_delayed_work_sync(&xd->get_uuid_work);  in stop_handshake()
1224 	cancel_delayed_work_sync(&xd->get_properties_work);  in stop_handshake()
1225 	cancel_delayed_work_sync(&xd->properties_changed_work);  in stop_handshake()
1231 	return 0;  in tb_xdomain_suspend()
1236 	struct tb_xdomain *xd = tb_to_xdomain(dev);  in tb_xdomain_resume()  local
1242 	xd->resume = true;  in tb_xdomain_resume()
1243 	start_handshake(xd);  in tb_xdomain_resume()
1245 	return 0;  in tb_xdomain_resume()
1276 	struct tb_xdomain *xd;  in tb_xdomain_alloc()  local
1283 	xd = kzalloc(sizeof(*xd), GFP_KERNEL);  in tb_xdomain_alloc()
1284 	if (!xd)  in tb_xdomain_alloc()
1287 	xd->tb = tb;  in tb_xdomain_alloc()
1288 	xd->route = route;  in tb_xdomain_alloc()
1289 	ida_init(&xd->service_ids);  in tb_xdomain_alloc()
1290 	mutex_init(&xd->lock);  in tb_xdomain_alloc()
1291 	INIT_DELAYED_WORK(&xd->get_uuid_work, tb_xdomain_get_uuid);  in tb_xdomain_alloc()
1292 	INIT_DELAYED_WORK(&xd->get_properties_work, tb_xdomain_get_properties);  in tb_xdomain_alloc()
1293 	INIT_DELAYED_WORK(&xd->properties_changed_work,  in tb_xdomain_alloc()
1296 	xd->local_uuid = kmemdup(local_uuid, sizeof(uuid_t), GFP_KERNEL);  in tb_xdomain_alloc()
1297 	if (!xd->local_uuid)  in tb_xdomain_alloc()
1301 		xd->remote_uuid = kmemdup(remote_uuid, sizeof(uuid_t),  in tb_xdomain_alloc()
1303 		if (!xd->remote_uuid)  in tb_xdomain_alloc()
1306 		xd->needs_uuid = true;  in tb_xdomain_alloc()
1309 	device_initialize(&xd->dev);  in tb_xdomain_alloc()
1310 	xd->dev.parent = get_device(parent);  in tb_xdomain_alloc()
1311 	xd->dev.bus = &tb_bus_type;  in tb_xdomain_alloc()
1312 	xd->dev.type = &tb_xdomain_type;  in tb_xdomain_alloc()
1313 	xd->dev.groups = xdomain_attr_groups;  in tb_xdomain_alloc()
1314 	dev_set_name(&xd->dev, "%u-%llx", tb->index, route);  in tb_xdomain_alloc()
1320 	pm_runtime_set_active(&xd->dev);  in tb_xdomain_alloc()
1321 	pm_runtime_get_noresume(&xd->dev);  in tb_xdomain_alloc()
1322 	pm_runtime_enable(&xd->dev);  in tb_xdomain_alloc()
1324 	return xd;  in tb_xdomain_alloc()
1327 	kfree(xd->local_uuid);  in tb_xdomain_alloc()
1329 	kfree(xd);  in tb_xdomain_alloc()
1336  * @xd: XDomain to add
1343 void tb_xdomain_add(struct tb_xdomain *xd)  in tb_xdomain_add()  argument
1346 	start_handshake(xd);  in tb_xdomain_add()
1352 	return 0;  in unregister_service()
1357  * @xd: XDomain to remove
1360  * along with any services from the bus. When the last reference to @xd
1363 void tb_xdomain_remove(struct tb_xdomain *xd)  in tb_xdomain_remove()  argument
1365 	stop_handshake(xd);  in tb_xdomain_remove()
1367 	device_for_each_child_reverse(&xd->dev, xd, unregister_service);  in tb_xdomain_remove()
1374 	pm_runtime_disable(&xd->dev);  in tb_xdomain_remove()
1375 	pm_runtime_put_noidle(&xd->dev);  in tb_xdomain_remove()
1376 	pm_runtime_set_suspended(&xd->dev);  in tb_xdomain_remove()
1378 	if (!device_is_registered(&xd->dev))  in tb_xdomain_remove()
1379 		put_device(&xd->dev);  in tb_xdomain_remove()
1381 		device_unregister(&xd->dev);  in tb_xdomain_remove()
1386  * @xd: XDomain connection
1398  * Return: %0 in case of success and negative errno in case of error
1400 int tb_xdomain_enable_paths(struct tb_xdomain *xd, u16 transmit_path,  in tb_xdomain_enable_paths()  argument
1406 	mutex_lock(&xd->lock);  in tb_xdomain_enable_paths()
1408 	if (xd->transmit_path) {  in tb_xdomain_enable_paths()
1409 		ret = xd->transmit_path == transmit_path ? 0 : -EBUSY;  in tb_xdomain_enable_paths()
1413 	xd->transmit_path = transmit_path;  in tb_xdomain_enable_paths()
1414 	xd->transmit_ring = transmit_ring;  in tb_xdomain_enable_paths()
1415 	xd->receive_path = receive_path;  in tb_xdomain_enable_paths()
1416 	xd->receive_ring = receive_ring;  in tb_xdomain_enable_paths()
1418 	ret = tb_domain_approve_xdomain_paths(xd->tb, xd);  in tb_xdomain_enable_paths()
1421 	mutex_unlock(&xd->lock);  in tb_xdomain_enable_paths()
1429  * @xd: XDomain connection
1434  * Return: %0 in case of success and negative errno in case of error
1436 int tb_xdomain_disable_paths(struct tb_xdomain *xd)  in tb_xdomain_disable_paths()  argument
1438 	int ret = 0;  in tb_xdomain_disable_paths()
1440 	mutex_lock(&xd->lock);  in tb_xdomain_disable_paths()
1441 	if (xd->transmit_path) {  in tb_xdomain_disable_paths()
1442 		xd->transmit_path = 0;  in tb_xdomain_disable_paths()
1443 		xd->transmit_ring = 0;  in tb_xdomain_disable_paths()
1444 		xd->receive_path = 0;  in tb_xdomain_disable_paths()
1445 		xd->receive_ring = 0;  in tb_xdomain_disable_paths()
1447 		ret = tb_domain_disconnect_xdomain_paths(xd->tb, xd);  in tb_xdomain_disable_paths()
1449 	mutex_unlock(&xd->lock);  in tb_xdomain_disable_paths()
1468 		struct tb_xdomain *xd;  in switch_find_xdomain()  local
1471 			xd = port->xdomain;  in switch_find_xdomain()
1474 				if (xd->remote_uuid &&  in switch_find_xdomain()
1475 				    uuid_equal(xd->remote_uuid, lookup->uuid))  in switch_find_xdomain()
1476 					return xd;  in switch_find_xdomain()
1478 				   lookup->link == xd->link &&  in switch_find_xdomain()
1479 				   lookup->depth == xd->depth) {  in switch_find_xdomain()
1480 				return xd;  in switch_find_xdomain()
1482 				   lookup->route == xd->route) {  in switch_find_xdomain()
1483 				return xd;  in switch_find_xdomain()
1486 			xd = switch_find_xdomain(port->remote->sw, lookup);  in switch_find_xdomain()
1487 			if (xd)  in switch_find_xdomain()
1488 				return xd;  in switch_find_xdomain()
1513 	struct tb_xdomain *xd;  in tb_xdomain_find_by_uuid()  local
1515 	memset(&lookup, 0, sizeof(lookup));  in tb_xdomain_find_by_uuid()
1518 	xd = switch_find_xdomain(tb->root_switch, &lookup);  in tb_xdomain_find_by_uuid()
1519 	return tb_xdomain_get(xd);  in tb_xdomain_find_by_uuid()
1543 	struct tb_xdomain *xd;  in tb_xdomain_find_by_link_depth()  local
1545 	memset(&lookup, 0, sizeof(lookup));  in tb_xdomain_find_by_link_depth()
1549 	xd = switch_find_xdomain(tb->root_switch, &lookup);  in tb_xdomain_find_by_link_depth()
1550 	return tb_xdomain_get(xd);  in tb_xdomain_find_by_link_depth()
1571 	struct tb_xdomain *xd;  in tb_xdomain_find_by_route()  local
1573 	memset(&lookup, 0, sizeof(lookup));  in tb_xdomain_find_by_route()
1576 	xd = switch_find_xdomain(tb->root_switch, &lookup);  in tb_xdomain_find_by_route()
1577 	return tb_xdomain_get(xd);  in tb_xdomain_find_by_route()
1587 	int ret = 0;  in tb_xdomain_handle_request()
1621 	return ret > 0;  in tb_xdomain_handle_request()
1626 	struct tb_xdomain *xd;  in update_xdomain()  local
1628 	xd = tb_to_xdomain(dev);  in update_xdomain()
1629 	if (xd) {  in update_xdomain()
1630 		queue_delayed_work(xd->tb->wq, &xd->properties_changed_work,  in update_xdomain()
1634 	return 0;  in update_xdomain()
1665  * Return: %0 on success and negative errno on failure
1696 	return 0;  in tb_register_property_dir()
1714 	int ret = 0;  in tb_unregister_property_dir()
1742 	tb_property_add_immediate(xdomain_property_dir, "deviceid", 0x1);  in tb_xdomain_init()
1743 	tb_property_add_immediate(xdomain_property_dir, "devicerv", 0x80000100);  in tb_xdomain_init()
1745 	return 0;  in tb_xdomain_init()