| /* |
| * SVC Greybus driver. |
| * |
| * Copyright 2015 Google Inc. |
| * Copyright 2015 Linaro Ltd. |
| * |
| * Released under the GPLv2 only. |
| */ |
| |
| #include <linux/workqueue.h> |
| |
| #include "greybus.h" |
| |
| #define CPORT_FLAGS_E2EFC (1) |
| #define CPORT_FLAGS_CSD_N (2) |
| #define CPORT_FLAGS_CSV_N (4) |
| |
| enum gb_svc_state { |
| GB_SVC_STATE_RESET, |
| GB_SVC_STATE_PROTOCOL_VERSION, |
| GB_SVC_STATE_SVC_HELLO, |
| }; |
| |
| struct gb_svc { |
| struct gb_connection *connection; |
| enum gb_svc_state state; |
| struct ida device_id_map; |
| }; |
| |
| struct svc_hotplug { |
| struct work_struct work; |
| struct gb_connection *connection; |
| struct gb_svc_intf_hotplug_request data; |
| }; |
| |
| |
| /* |
| * AP's SVC cport is required early to get messages from the SVC. This happens |
| * even before the Endo is created and hence any modules or interfaces. |
| * |
| * This is a temporary connection, used only at initial bootup. |
| */ |
| struct gb_connection * |
| gb_ap_svc_connection_create(struct greybus_host_device *hd) |
| { |
| struct gb_connection *connection; |
| |
| connection = gb_connection_create_range(hd, NULL, hd->parent, |
| GB_SVC_CPORT_ID, |
| GREYBUS_PROTOCOL_SVC, |
| GB_SVC_CPORT_ID, |
| GB_SVC_CPORT_ID + 1); |
| |
| return connection; |
| } |
| |
| /* |
| * We know endo-type and AP's interface id now, lets create a proper svc |
| * connection (and its interface/bundle) now and get rid of the initial |
| * 'partially' initialized one svc connection. |
| */ |
| static struct gb_interface * |
| gb_ap_interface_create(struct greybus_host_device *hd, |
| struct gb_connection *connection, u8 interface_id) |
| { |
| struct gb_interface *intf; |
| struct device *dev = &hd->endo->dev; |
| |
| intf = gb_interface_create(hd, interface_id); |
| if (!intf) { |
| dev_err(dev, "%s: Failed to create interface with id %hhu\n", |
| __func__, interface_id); |
| return NULL; |
| } |
| |
| intf->device_id = GB_DEVICE_ID_AP; |
| svc_update_connection(intf, connection); |
| |
| /* Its no longer a partially initialized connection */ |
| hd->initial_svc_connection = NULL; |
| |
| return intf; |
| } |
| |
| static int gb_svc_intf_device_id(struct gb_svc *svc, u8 intf_id, u8 device_id) |
| { |
| struct gb_svc_intf_device_id_request request; |
| |
| request.intf_id = intf_id; |
| request.device_id = device_id; |
| |
| return gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_DEVICE_ID, |
| &request, sizeof(request), NULL, 0); |
| } |
| |
| int gb_svc_intf_reset(struct gb_svc *svc, u8 intf_id) |
| { |
| struct gb_svc_intf_reset_request request; |
| |
| request.intf_id = intf_id; |
| |
| return gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_RESET, |
| &request, sizeof(request), NULL, 0); |
| } |
| EXPORT_SYMBOL_GPL(gb_svc_intf_reset); |
| |
| int gb_svc_dme_peer_get(struct gb_svc *svc, u8 intf_id, u16 attr, u16 selector, |
| u32 *value) |
| { |
| struct gb_svc_dme_peer_get_request request; |
| struct gb_svc_dme_peer_get_response response; |
| u16 result; |
| int ret; |
| |
| request.intf_id = intf_id; |
| request.attr = cpu_to_le16(attr); |
| request.selector = cpu_to_le16(selector); |
| |
| ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_DME_PEER_GET, |
| &request, sizeof(request), |
| &response, sizeof(response)); |
| if (ret) { |
| dev_err(&svc->connection->dev, |
| "failed to get DME attribute (%hhu %hx %hu) %d\n", |
| intf_id, attr, selector, ret); |
| return ret; |
| } |
| |
| result = le16_to_cpu(response.result_code); |
| if (result) { |
| dev_err(&svc->connection->dev, |
| "Unipro error %hu while getting DME attribute (%hhu %hx %hu)\n", |
| result, intf_id, attr, selector); |
| return -EINVAL; |
| } |
| |
| if (value) |
| *value = le32_to_cpu(response.attr_value); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(gb_svc_dme_peer_get); |
| |
| int gb_svc_dme_peer_set(struct gb_svc *svc, u8 intf_id, u16 attr, u16 selector, |
| u32 value) |
| { |
| struct gb_svc_dme_peer_set_request request; |
| struct gb_svc_dme_peer_set_response response; |
| u16 result; |
| int ret; |
| |
| request.intf_id = intf_id; |
| request.attr = cpu_to_le16(attr); |
| request.selector = cpu_to_le16(selector); |
| request.value = cpu_to_le32(value); |
| |
| ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_DME_PEER_SET, |
| &request, sizeof(request), |
| &response, sizeof(response)); |
| if (ret) { |
| dev_err(&svc->connection->dev, |
| "failed to set DME attribute (%hhu %hx %hu %u) %d\n", |
| intf_id, attr, selector, value, ret); |
| return ret; |
| } |
| |
| result = le16_to_cpu(response.result_code); |
| if (result) { |
| dev_err(&svc->connection->dev, |
| "Unipro error %hu while setting DME attribute (%hhu %hx %hu %u)\n", |
| result, intf_id, attr, selector, value); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(gb_svc_dme_peer_set); |
| |
| /* |
| * T_TstSrcIncrement is written by the module on ES2 as a stand-in for boot |
| * status attribute. AP needs to read and clear it, after reading a non-zero |
| * value from it. |
| * |
| * FIXME: This is module-hardware dependent and needs to be extended for every |
| * type of module we want to support. |
| */ |
| static int gb_svc_read_and_clear_module_boot_status(struct gb_interface *intf) |
| { |
| struct greybus_host_device *hd = intf->hd; |
| int ret; |
| u32 value; |
| |
| /* Read and clear boot status in T_TstSrcIncrement */ |
| ret = gb_svc_dme_peer_get(hd->svc, intf->interface_id, |
| DME_ATTR_T_TST_SRC_INCREMENT, |
| DME_ATTR_SELECTOR_INDEX, &value); |
| |
| if (ret) |
| return ret; |
| |
| /* |
| * A nonzero boot status indicates the module has finished |
| * booting. Clear it. |
| */ |
| if (!value) { |
| dev_err(&intf->dev, "Module not ready yet\n"); |
| return -ENODEV; |
| } |
| |
| return gb_svc_dme_peer_set(hd->svc, intf->interface_id, |
| DME_ATTR_T_TST_SRC_INCREMENT, |
| DME_ATTR_SELECTOR_INDEX, 0); |
| } |
| |
| int gb_svc_connection_create(struct gb_svc *svc, |
| u8 intf1_id, u16 cport1_id, |
| u8 intf2_id, u16 cport2_id) |
| { |
| struct gb_svc_conn_create_request request; |
| |
| request.intf1_id = intf1_id; |
| request.cport1_id = cpu_to_le16(cport1_id); |
| request.intf2_id = intf2_id; |
| request.cport2_id = cpu_to_le16(cport2_id); |
| /* |
| * XXX: fix connections paramaters to TC0 and all CPort flags |
| * for now. |
| */ |
| request.tc = 0; |
| request.flags = CPORT_FLAGS_CSV_N | CPORT_FLAGS_E2EFC; |
| |
| return gb_operation_sync(svc->connection, GB_SVC_TYPE_CONN_CREATE, |
| &request, sizeof(request), NULL, 0); |
| } |
| EXPORT_SYMBOL_GPL(gb_svc_connection_create); |
| |
| void gb_svc_connection_destroy(struct gb_svc *svc, u8 intf1_id, u16 cport1_id, |
| u8 intf2_id, u16 cport2_id) |
| { |
| struct gb_svc_conn_destroy_request request; |
| struct gb_connection *connection = svc->connection; |
| int ret; |
| |
| request.intf1_id = intf1_id; |
| request.cport1_id = cpu_to_le16(cport1_id); |
| request.intf2_id = intf2_id; |
| request.cport2_id = cpu_to_le16(cport2_id); |
| |
| ret = gb_operation_sync(connection, GB_SVC_TYPE_CONN_DESTROY, |
| &request, sizeof(request), NULL, 0); |
| if (ret) { |
| dev_err(&connection->dev, |
| "failed to destroy connection (%hhx:%hx %hhx:%hx) %d\n", |
| intf1_id, cport1_id, intf2_id, cport2_id, ret); |
| } |
| } |
| EXPORT_SYMBOL_GPL(gb_svc_connection_destroy); |
| |
| /* Creates bi-directional routes between the devices */ |
| static int gb_svc_route_create(struct gb_svc *svc, u8 intf1_id, u8 dev1_id, |
| u8 intf2_id, u8 dev2_id) |
| { |
| struct gb_svc_route_create_request request; |
| |
| request.intf1_id = intf1_id; |
| request.dev1_id = dev1_id; |
| request.intf2_id = intf2_id; |
| request.dev2_id = dev2_id; |
| |
| return gb_operation_sync(svc->connection, GB_SVC_TYPE_ROUTE_CREATE, |
| &request, sizeof(request), NULL, 0); |
| } |
| |
| /* Destroys bi-directional routes between the devices */ |
| static void gb_svc_route_destroy(struct gb_svc *svc, u8 intf1_id, u8 intf2_id) |
| { |
| struct gb_svc_route_destroy_request request; |
| int ret; |
| |
| request.intf1_id = intf1_id; |
| request.intf2_id = intf2_id; |
| |
| ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_ROUTE_DESTROY, |
| &request, sizeof(request), NULL, 0); |
| if (ret) { |
| dev_err(&svc->connection->dev, |
| "failed to destroy route (%hhx %hhx) %d\n", |
| intf1_id, intf2_id, ret); |
| } |
| } |
| |
| static int gb_svc_version_request(struct gb_operation *op) |
| { |
| struct gb_connection *connection = op->connection; |
| struct gb_protocol_version_request *request; |
| struct gb_protocol_version_response *response; |
| struct device *dev = &connection->dev; |
| |
| request = op->request->payload; |
| |
| if (request->major > GB_SVC_VERSION_MAJOR) { |
| dev_err(&connection->dev, |
| "unsupported major version (%hhu > %hhu)\n", |
| request->major, GB_SVC_VERSION_MAJOR); |
| return -ENOTSUPP; |
| } |
| |
| connection->module_major = request->major; |
| connection->module_minor = request->minor; |
| |
| if (!gb_operation_response_alloc(op, sizeof(*response), GFP_KERNEL)) { |
| dev_err(dev, "%s: error allocating response\n", |
| __func__); |
| return -ENOMEM; |
| } |
| |
| response = op->response->payload; |
| response->major = connection->module_major; |
| response->minor = connection->module_minor; |
| |
| return 0; |
| } |
| |
| static int gb_svc_hello(struct gb_operation *op) |
| { |
| struct gb_connection *connection = op->connection; |
| struct greybus_host_device *hd = connection->hd; |
| struct gb_svc_hello_request *hello_request; |
| struct device *dev = &connection->dev; |
| struct gb_interface *intf; |
| u16 endo_id; |
| u8 interface_id; |
| int ret; |
| |
| /* |
| * SVC sends information about the endo and interface-id on the hello |
| * request, use that to create an endo. |
| */ |
| if (op->request->payload_size < sizeof(*hello_request)) { |
| dev_err(dev, "%s: Illegal size of hello request (%zu < %zu)\n", |
| __func__, op->request->payload_size, |
| sizeof(*hello_request)); |
| return -EINVAL; |
| } |
| |
| hello_request = op->request->payload; |
| endo_id = le16_to_cpu(hello_request->endo_id); |
| interface_id = hello_request->interface_id; |
| |
| /* Setup Endo */ |
| ret = greybus_endo_setup(hd, endo_id, interface_id); |
| if (ret) |
| return ret; |
| |
| /* |
| * Endo and its modules are ready now, fix AP's partially initialized |
| * svc protocol and its connection. |
| */ |
| intf = gb_ap_interface_create(hd, connection, interface_id); |
| if (!intf) { |
| gb_endo_remove(hd->endo); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static void svc_intf_remove(struct gb_connection *connection, |
| struct gb_interface *intf) |
| { |
| struct greybus_host_device *hd = connection->hd; |
| struct gb_svc *svc = connection->private; |
| u8 intf_id = intf->interface_id; |
| u8 device_id; |
| |
| device_id = intf->device_id; |
| gb_interface_remove(intf); |
| |
| /* |
| * Destroy the two-way route between the AP and the interface. |
| */ |
| gb_svc_route_destroy(svc, hd->endo->ap_intf_id, intf_id); |
| |
| ida_simple_remove(&svc->device_id_map, device_id); |
| } |
| |
| /* |
| * 'struct svc_hotplug' should be freed by svc_process_hotplug() before it |
| * returns, irrespective of success or Failure in bringing up the module. |
| */ |
| static void svc_process_hotplug(struct work_struct *work) |
| { |
| struct svc_hotplug *svc_hotplug = container_of(work, struct svc_hotplug, |
| work); |
| struct gb_svc_intf_hotplug_request *hotplug = &svc_hotplug->data; |
| struct gb_connection *connection = svc_hotplug->connection; |
| struct gb_svc *svc = connection->private; |
| struct greybus_host_device *hd = connection->hd; |
| struct device *dev = &connection->dev; |
| struct gb_interface *intf; |
| u8 intf_id, device_id; |
| int ret; |
| |
| /* |
| * Grab the information we need. |
| */ |
| intf_id = hotplug->intf_id; |
| |
| intf = gb_interface_find(hd, intf_id); |
| if (intf) { |
| /* |
| * We have received a hotplug request for an interface that |
| * already exists. |
| * |
| * This can happen in cases like: |
| * - bootrom loading the firmware image and booting into that, |
| * which only generates a hotplug event. i.e. no hot-unplug |
| * event. |
| * - Or the firmware on the module crashed and sent hotplug |
| * request again to the SVC, which got propagated to AP. |
| * |
| * Remove the interface and add it again, and let user know |
| * about this with a print message. |
| */ |
| dev_info(dev, "Removed interface (%hhu) to add it again\n", |
| intf_id); |
| svc_intf_remove(connection, intf); |
| } |
| |
| intf = gb_interface_create(hd, intf_id); |
| if (!intf) { |
| dev_err(dev, "%s: Failed to create interface with id %hhu\n", |
| __func__, intf_id); |
| goto free_svc_hotplug; |
| } |
| |
| ret = gb_svc_read_and_clear_module_boot_status(intf); |
| if (ret) |
| goto destroy_interface; |
| |
| intf->unipro_mfg_id = le32_to_cpu(hotplug->data.unipro_mfg_id); |
| intf->unipro_prod_id = le32_to_cpu(hotplug->data.unipro_prod_id); |
| intf->ara_vend_id = le32_to_cpu(hotplug->data.ara_vend_id); |
| intf->ara_prod_id = le32_to_cpu(hotplug->data.ara_prod_id); |
| |
| /* |
| * Create a device id for the interface: |
| * - device id 0 (GB_DEVICE_ID_SVC) belongs to the SVC |
| * - device id 1 (GB_DEVICE_ID_AP) belongs to the AP |
| * |
| * XXX Do we need to allocate device ID for SVC or the AP here? And what |
| * XXX about an AP with multiple interface blocks? |
| */ |
| device_id = ida_simple_get(&svc->device_id_map, |
| GB_DEVICE_ID_MODULES_START, 0, GFP_KERNEL); |
| if (device_id < 0) { |
| ret = device_id; |
| dev_err(dev, "%s: Failed to allocate device id for interface with id %hhu (%d)\n", |
| __func__, intf_id, ret); |
| goto destroy_interface; |
| } |
| |
| ret = gb_svc_intf_device_id(svc, intf_id, device_id); |
| if (ret) { |
| dev_err(dev, "%s: Device id operation failed, interface %hhu device_id %hhu (%d)\n", |
| __func__, intf_id, device_id, ret); |
| goto ida_put; |
| } |
| |
| /* |
| * Create a two-way route between the AP and the new interface |
| */ |
| ret = gb_svc_route_create(svc, hd->endo->ap_intf_id, GB_DEVICE_ID_AP, |
| intf_id, device_id); |
| if (ret) { |
| dev_err(dev, "%s: Route create operation failed, interface %hhu device_id %hhu (%d)\n", |
| __func__, intf_id, device_id, ret); |
| goto svc_id_free; |
| } |
| |
| ret = gb_interface_init(intf, device_id); |
| if (ret) { |
| dev_err(dev, "%s: Failed to initialize interface, interface %hhu device_id %hhu (%d)\n", |
| __func__, intf_id, device_id, ret); |
| goto destroy_route; |
| } |
| |
| goto free_svc_hotplug; |
| |
| destroy_route: |
| gb_svc_route_destroy(svc, hd->endo->ap_intf_id, intf_id); |
| svc_id_free: |
| /* |
| * XXX Should we tell SVC that this id doesn't belong to interface |
| * XXX anymore. |
| */ |
| ida_put: |
| ida_simple_remove(&svc->device_id_map, device_id); |
| destroy_interface: |
| gb_interface_remove(intf); |
| free_svc_hotplug: |
| kfree(svc_hotplug); |
| } |
| |
| /* |
| * Bringing up a module can be time consuming, as that may require lots of |
| * initialization on the module side. Over that, we may also need to download |
| * the firmware first and flash that on the module. |
| * |
| * In order to make other hotplug events to not wait for all this to finish, |
| * handle most of module hotplug stuff outside of the hotplug callback, with |
| * help of a workqueue. |
| */ |
| static int gb_svc_intf_hotplug_recv(struct gb_operation *op) |
| { |
| struct gb_message *request = op->request; |
| struct svc_hotplug *svc_hotplug; |
| |
| if (request->payload_size < sizeof(svc_hotplug->data)) { |
| dev_err(&op->connection->dev, |
| "%s: short hotplug request received (%zu < %zu)\n", |
| __func__, request->payload_size, |
| sizeof(svc_hotplug->data)); |
| return -EINVAL; |
| } |
| |
| svc_hotplug = kmalloc(sizeof(*svc_hotplug), GFP_KERNEL); |
| if (!svc_hotplug) |
| return -ENOMEM; |
| |
| svc_hotplug->connection = op->connection; |
| memcpy(&svc_hotplug->data, op->request->payload, sizeof(svc_hotplug->data)); |
| |
| INIT_WORK(&svc_hotplug->work, svc_process_hotplug); |
| queue_work(system_unbound_wq, &svc_hotplug->work); |
| |
| return 0; |
| } |
| |
| static int gb_svc_intf_hot_unplug_recv(struct gb_operation *op) |
| { |
| struct gb_message *request = op->request; |
| struct gb_svc_intf_hot_unplug_request *hot_unplug = request->payload; |
| struct greybus_host_device *hd = op->connection->hd; |
| struct device *dev = &op->connection->dev; |
| struct gb_interface *intf; |
| u8 intf_id; |
| |
| if (request->payload_size < sizeof(*hot_unplug)) { |
| dev_err(dev, "short hot unplug request received (%zu < %zu)\n", |
| request->payload_size, sizeof(*hot_unplug)); |
| return -EINVAL; |
| } |
| |
| intf_id = hot_unplug->intf_id; |
| |
| intf = gb_interface_find(hd, intf_id); |
| if (!intf) { |
| dev_err(dev, "%s: Couldn't find interface for id %hhu\n", |
| __func__, intf_id); |
| return -EINVAL; |
| } |
| |
| svc_intf_remove(op->connection, intf); |
| |
| return 0; |
| } |
| |
| static int gb_svc_intf_reset_recv(struct gb_operation *op) |
| { |
| struct gb_message *request = op->request; |
| struct gb_svc_intf_reset_request *reset; |
| u8 intf_id; |
| |
| if (request->payload_size < sizeof(*reset)) { |
| dev_err(&op->connection->dev, |
| "short reset request received (%zu < %zu)\n", |
| request->payload_size, sizeof(*reset)); |
| return -EINVAL; |
| } |
| reset = request->payload; |
| |
| intf_id = reset->intf_id; |
| |
| /* FIXME Reset the interface here */ |
| |
| return 0; |
| } |
| |
| static int gb_svc_request_recv(u8 type, struct gb_operation *op) |
| { |
| struct gb_connection *connection = op->connection; |
| struct gb_svc *svc = connection->private; |
| int ret = 0; |
| |
| /* |
| * SVC requests need to follow a specific order (at least initially) and |
| * below code takes care of enforcing that. The expected order is: |
| * - PROTOCOL_VERSION |
| * - SVC_HELLO |
| * - Any other request, but the earlier two. |
| * |
| * Incoming requests are guaranteed to be serialized and so we don't |
| * need to protect 'state' for any races. |
| */ |
| switch (type) { |
| case GB_REQUEST_TYPE_PROTOCOL_VERSION: |
| if (svc->state != GB_SVC_STATE_RESET) |
| ret = -EINVAL; |
| break; |
| case GB_SVC_TYPE_SVC_HELLO: |
| if (svc->state != GB_SVC_STATE_PROTOCOL_VERSION) |
| ret = -EINVAL; |
| break; |
| default: |
| if (svc->state != GB_SVC_STATE_SVC_HELLO) |
| ret = -EINVAL; |
| break; |
| } |
| |
| if (ret) { |
| dev_warn(&connection->dev, |
| "unexpected SVC request 0x%02x received (state %u)\n", |
| type, svc->state); |
| return ret; |
| } |
| |
| switch (type) { |
| case GB_REQUEST_TYPE_PROTOCOL_VERSION: |
| ret = gb_svc_version_request(op); |
| if (!ret) |
| svc->state = GB_SVC_STATE_PROTOCOL_VERSION; |
| return ret; |
| case GB_SVC_TYPE_SVC_HELLO: |
| ret = gb_svc_hello(op); |
| if (!ret) |
| svc->state = GB_SVC_STATE_SVC_HELLO; |
| return ret; |
| case GB_SVC_TYPE_INTF_HOTPLUG: |
| return gb_svc_intf_hotplug_recv(op); |
| case GB_SVC_TYPE_INTF_HOT_UNPLUG: |
| return gb_svc_intf_hot_unplug_recv(op); |
| case GB_SVC_TYPE_INTF_RESET: |
| return gb_svc_intf_reset_recv(op); |
| default: |
| dev_err(&op->connection->dev, |
| "unsupported request: %hhu\n", type); |
| return -EINVAL; |
| } |
| } |
| |
| static int gb_svc_connection_init(struct gb_connection *connection) |
| { |
| struct gb_svc *svc; |
| |
| svc = kzalloc(sizeof(*svc), GFP_KERNEL); |
| if (!svc) |
| return -ENOMEM; |
| |
| connection->hd->svc = svc; |
| svc->state = GB_SVC_STATE_RESET; |
| svc->connection = connection; |
| connection->private = svc; |
| |
| WARN_ON(connection->hd->initial_svc_connection); |
| connection->hd->initial_svc_connection = connection; |
| |
| ida_init(&svc->device_id_map); |
| |
| return 0; |
| } |
| |
| static void gb_svc_connection_exit(struct gb_connection *connection) |
| { |
| struct gb_svc *svc = connection->private; |
| |
| ida_destroy(&svc->device_id_map); |
| connection->hd->svc = NULL; |
| connection->private = NULL; |
| kfree(svc); |
| } |
| |
| static struct gb_protocol svc_protocol = { |
| .name = "svc", |
| .id = GREYBUS_PROTOCOL_SVC, |
| .major = GB_SVC_VERSION_MAJOR, |
| .minor = GB_SVC_VERSION_MINOR, |
| .connection_init = gb_svc_connection_init, |
| .connection_exit = gb_svc_connection_exit, |
| .request_recv = gb_svc_request_recv, |
| .flags = GB_PROTOCOL_SKIP_CONTROL_CONNECTED | |
| GB_PROTOCOL_SKIP_CONTROL_DISCONNECTED | |
| GB_PROTOCOL_NO_BUNDLE | |
| GB_PROTOCOL_SKIP_VERSION | |
| GB_PROTOCOL_SKIP_SVC_CONNECTION, |
| }; |
| gb_builtin_protocol_driver(svc_protocol); |