drivers/staging/greybus/svc.c

   1 /*
   2  * SVC Greybus driver.
   3  *
   4  * Copyright 2015 Google Inc.
   5  * Copyright 2015 Linaro Ltd.
   6  *
   7  * Released under the GPLv2 only.
   8  */
   9
  10 #include <linux/workqueue.h>
  11
  12 #include "greybus.h"
  13
  14 #define CPORT_FLAGS_E2EFC       (1)
  15 #define CPORT_FLAGS_CSD_N       (2)
  16 #define CPORT_FLAGS_CSV_N       (4)
  17
  18 enum gb_svc_state {
  19         GB_SVC_STATE_RESET,
  20         GB_SVC_STATE_PROTOCOL_VERSION,
  21         GB_SVC_STATE_SVC_HELLO,
  22 };
  23
  24 struct gb_svc {
  25         struct gb_connection    *connection;
  26         enum gb_svc_state       state;
  27         struct ida              device_id_map;
  28 };
  29
  30 struct svc_hotplug {
  31         struct work_struct work;
  32         struct gb_connection *connection;
  33         struct gb_svc_intf_hotplug_request data;
  34 };
  35
  36
  37 /*
  38  * AP's SVC cport is required early to get messages from the SVC. This happens
  39  * even before the Endo is created and hence any modules or interfaces.
  40  *
  41  * This is a temporary connection, used only at initial bootup.
  42  */
  43 struct gb_connection *
  44 gb_ap_svc_connection_create(struct greybus_host_device *hd)
  45 {
  46         struct gb_connection *connection;
  47
  48         connection = gb_connection_create_range(hd, NULL, hd->parent,
  49                                                 GB_SVC_CPORT_ID,
  50                                                 GREYBUS_PROTOCOL_SVC,
  51                                                 GB_SVC_CPORT_ID,
  52                                                 GB_SVC_CPORT_ID + 1);
  53
  54         return connection;
  55 }
  56
  57 /*
  58  * We know endo-type and AP's interface id now, lets create a proper svc
  59  * connection (and its interface/bundle) now and get rid of the initial
  60  * 'partially' initialized one svc connection.
  61  */
  62 static struct gb_interface *
  63 gb_ap_interface_create(struct greybus_host_device *hd,
  64                        struct gb_connection *connection, u8 interface_id)
  65 {
  66         struct gb_interface *intf;
  67         struct device *dev = &hd->endo->dev;
  68
  69         intf = gb_interface_create(hd, interface_id);
  70         if (!intf) {
  71                 dev_err(dev, "%s: Failed to create interface with id %hhu\n",
  72                         __func__, interface_id);
  73                 return NULL;
  74         }
  75
  76         intf->device_id = GB_DEVICE_ID_AP;
  77         svc_update_connection(intf, connection);
  78
  79         /* Its no longer a partially initialized connection */
  80         hd->initial_svc_connection = NULL;
  81
  82         return intf;
  83 }
  84
  85 static int gb_svc_intf_device_id(struct gb_svc *svc, u8 intf_id, u8 device_id)
  86 {
  87         struct gb_svc_intf_device_id_request request;
  88
  89         request.intf_id = intf_id;
  90         request.device_id = device_id;
  91
  92         return gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_DEVICE_ID,
  93                                  &request, sizeof(request), NULL, 0);
  94 }
  95
  96 int gb_svc_intf_reset(struct gb_svc *svc, u8 intf_id)
  97 {
  98         struct gb_svc_intf_reset_request request;
  99
 100         request.intf_id = intf_id;
 101
 102         return gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_RESET,
 103                                  &request, sizeof(request), NULL, 0);
 104 }
 105 EXPORT_SYMBOL_GPL(gb_svc_intf_reset);
 106
 107 int gb_svc_dme_peer_get(struct gb_svc *svc, u8 intf_id, u16 attr, u16 selector,
 108                         u32 *value)
 109 {
 110         struct gb_svc_dme_peer_get_request request;
 111         struct gb_svc_dme_peer_get_response response;
 112         u16 result;
 113         int ret;
 114
 115         request.intf_id = intf_id;
 116         request.attr = cpu_to_le16(attr);
 117         request.selector = cpu_to_le16(selector);
 118
 119         ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_DME_PEER_GET,
 120                                 &request, sizeof(request),
 121                                 &response, sizeof(response));
 122         if (ret) {
 123                 dev_err(&svc->connection->dev,
 124                         "failed to get DME attribute (%hhu %hx %hu) %d\n",
 125                         intf_id, attr, selector, ret);
 126                 return ret;
 127         }
 128
 129         result = le16_to_cpu(response.result_code);
 130         if (result) {
 131                 dev_err(&svc->connection->dev,
 132                         "Unipro error %hu while getting DME attribute (%hhu %hx %hu)\n",
 133                         result, intf_id, attr, selector);
 134                 return -EINVAL;
 135         }
 136
 137         if (value)
 138                 *value = le32_to_cpu(response.attr_value);
 139
 140         return 0;
 141 }
 142 EXPORT_SYMBOL_GPL(gb_svc_dme_peer_get);
 143
 144 int gb_svc_dme_peer_set(struct gb_svc *svc, u8 intf_id, u16 attr, u16 selector,
 145                         u32 value)
 146 {
 147         struct gb_svc_dme_peer_set_request request;
 148         struct gb_svc_dme_peer_set_response response;
 149         u16 result;
 150         int ret;
 151
 152         request.intf_id = intf_id;
 153         request.attr = cpu_to_le16(attr);
 154         request.selector = cpu_to_le16(selector);
 155         request.value = cpu_to_le32(value);
 156
 157         ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_DME_PEER_SET,
 158                                 &request, sizeof(request),
 159                                 &response, sizeof(response));
 160         if (ret) {
 161                 dev_err(&svc->connection->dev,
 162                         "failed to set DME attribute (%hhu %hx %hu %u) %d\n",
 163                         intf_id, attr, selector, value, ret);
 164                 return ret;
 165         }
 166
 167         result = le16_to_cpu(response.result_code);
 168         if (result) {
 169                 dev_err(&svc->connection->dev,
 170                         "Unipro error %hu while setting DME attribute (%hhu %hx %hu %u)\n",
 171                         result, intf_id, attr, selector, value);
 172                 return -EINVAL;
 173         }
 174
 175         return 0;
 176 }
 177 EXPORT_SYMBOL_GPL(gb_svc_dme_peer_set);
 178
 179 int gb_svc_connection_create(struct gb_svc *svc,
 180                                 u8 intf1_id, u16 cport1_id,
 181                                 u8 intf2_id, u16 cport2_id)
 182 {
 183         struct gb_svc_conn_create_request request;
 184
 185         request.intf1_id = intf1_id;
 186         request.cport1_id = cpu_to_le16(cport1_id);
 187         request.intf2_id = intf2_id;
 188         request.cport2_id = cpu_to_le16(cport2_id);
 189         /*
 190          * XXX: fix connections paramaters to TC0 and all CPort flags
 191          * for now.
 192          */
 193         request.tc = 0;
 194         request.flags = CPORT_FLAGS_CSV_N | CPORT_FLAGS_E2EFC;
 195
 196         return gb_operation_sync(svc->connection, GB_SVC_TYPE_CONN_CREATE,
 197                                  &request, sizeof(request), NULL, 0);
 198 }
 199 EXPORT_SYMBOL_GPL(gb_svc_connection_create);
 200
 201 void gb_svc_connection_destroy(struct gb_svc *svc, u8 intf1_id, u16 cport1_id,
 202                                u8 intf2_id, u16 cport2_id)
 203 {
 204         struct gb_svc_conn_destroy_request request;
 205         struct gb_connection *connection = svc->connection;
 206         int ret;
 207
 208         request.intf1_id = intf1_id;
 209         request.cport1_id = cpu_to_le16(cport1_id);
 210         request.intf2_id = intf2_id;
 211         request.cport2_id = cpu_to_le16(cport2_id);
 212
 213         ret = gb_operation_sync(connection, GB_SVC_TYPE_CONN_DESTROY,
 214                                 &request, sizeof(request), NULL, 0);
 215         if (ret) {
 216                 dev_err(&connection->dev,
 217                         "failed to destroy connection (%hhx:%hx %hhx:%hx) %d\n",
 218                         intf1_id, cport1_id, intf2_id, cport2_id, ret);
 219         }
 220 }
 221 EXPORT_SYMBOL_GPL(gb_svc_connection_destroy);
 222
 223 /* Creates bi-directional routes between the devices */
 224 static int gb_svc_route_create(struct gb_svc *svc, u8 intf1_id, u8 dev1_id,
 225                                u8 intf2_id, u8 dev2_id)
 226 {
 227         struct gb_svc_route_create_request request;
 228
 229         request.intf1_id = intf1_id;
 230         request.dev1_id = dev1_id;
 231         request.intf2_id = intf2_id;
 232         request.dev2_id = dev2_id;
 233
 234         return gb_operation_sync(svc->connection, GB_SVC_TYPE_ROUTE_CREATE,
 235                                  &request, sizeof(request), NULL, 0);
 236 }
 237
 238 /* Destroys bi-directional routes between the devices */
 239 static void gb_svc_route_destroy(struct gb_svc *svc, u8 intf1_id, u8 intf2_id)
 240 {
 241         struct gb_svc_route_destroy_request request;
 242         int ret;
 243
 244         request.intf1_id = intf1_id;
 245         request.intf2_id = intf2_id;
 246
 247         ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_ROUTE_DESTROY,
 248                                 &request, sizeof(request), NULL, 0);
 249         if (ret) {
 250                 dev_err(&svc->connection->dev,
 251                         "failed to destroy route (%hhx %hhx) %d\n",
 252                         intf1_id, intf2_id, ret);
 253         }
 254 }
 255
 256 static int gb_svc_version_request(struct gb_operation *op)
 257 {
 258         struct gb_connection *connection = op->connection;
 259         struct gb_protocol_version_request *request;
 260         struct gb_protocol_version_response *response;
 261         struct device *dev = &connection->dev;
 262
 263         request = op->request->payload;
 264
 265         if (request->major > GB_SVC_VERSION_MAJOR) {
 266                 dev_err(&connection->dev,
 267                         "unsupported major version (%hhu > %hhu)\n",
 268                         request->major, GB_SVC_VERSION_MAJOR);
 269                 return -ENOTSUPP;
 270         }
 271
 272         connection->module_major = request->major;
 273         connection->module_minor = request->minor;
 274
 275         if (!gb_operation_response_alloc(op, sizeof(*response), GFP_KERNEL)) {
 276                 dev_err(dev, "%s: error allocating response\n",
 277                                 __func__);
 278                 return -ENOMEM;
 279         }
 280
 281         response = op->response->payload;
 282         response->major = connection->module_major;
 283         response->minor = connection->module_minor;
 284
 285         return 0;
 286 }
 287
 288 static int gb_svc_hello(struct gb_operation *op)
 289 {
 290         struct gb_connection *connection = op->connection;
 291         struct greybus_host_device *hd = connection->hd;
 292         struct gb_svc_hello_request *hello_request;
 293         struct device *dev = &connection->dev;
 294         struct gb_interface *intf;
 295         u16 endo_id;
 296         u8 interface_id;
 297         int ret;
 298
 299         /*
 300          * SVC sends information about the endo and interface-id on the hello
 301          * request, use that to create an endo.
 302          */
 303         if (op->request->payload_size < sizeof(*hello_request)) {
 304                 dev_err(dev, "%s: Illegal size of hello request (%zu < %zu)\n",
 305                         __func__, op->request->payload_size,
 306                         sizeof(*hello_request));
 307                 return -EINVAL;
 308         }
 309
 310         hello_request = op->request->payload;
 311         endo_id = le16_to_cpu(hello_request->endo_id);
 312         interface_id = hello_request->interface_id;
 313
 314         /* Setup Endo */
 315         ret = greybus_endo_setup(hd, endo_id, interface_id);
 316         if (ret)
 317                 return ret;
 318
 319         /*
 320          * Endo and its modules are ready now, fix AP's partially initialized
 321          * svc protocol and its connection.
 322          */
 323         intf = gb_ap_interface_create(hd, connection, interface_id);
 324         if (!intf) {
 325                 gb_endo_remove(hd->endo);
 326                 return ret;
 327         }
 328
 329         return 0;
 330 }
 331
 332 static void svc_intf_remove(struct gb_connection *connection,
 333                             struct gb_interface *intf)
 334 {
 335         struct greybus_host_device *hd = connection->hd;
 336         struct gb_svc *svc = connection->private;
 337         u8 intf_id = intf->interface_id;
 338         u8 device_id;
 339
 340         device_id = intf->device_id;
 341         gb_interface_remove(hd, intf_id);
 342
 343         /*
 344          * Destroy the two-way route between the AP and the interface.
 345          */
 346         gb_svc_route_destroy(svc, hd->endo->ap_intf_id, intf_id);
 347
 348         ida_simple_remove(&svc->device_id_map, device_id);
 349 }
 350
 351 /*
 352  * 'struct svc_hotplug' should be freed by svc_process_hotplug() before it
 353  * returns, irrespective of success or Failure in bringing up the module.
 354  */
 355 static void svc_process_hotplug(struct work_struct *work)
 356 {
 357         struct svc_hotplug *svc_hotplug = container_of(work, struct svc_hotplug,
 358                                                        work);
 359         struct gb_svc_intf_hotplug_request *hotplug = &svc_hotplug->data;
 360         struct gb_connection *connection = svc_hotplug->connection;
 361         struct gb_svc *svc = connection->private;
 362         struct greybus_host_device *hd = connection->hd;
 363         struct device *dev = &connection->dev;
 364         struct gb_interface *intf;
 365         u8 intf_id, device_id;
 366         int ret;
 367
 368         /*
 369          * Grab the information we need.
 370          */
 371         intf_id = hotplug->intf_id;
 372
 373         intf = gb_interface_find(hd, intf_id);
 374         if (intf) {
 375                 /*
 376                  * We have received a hotplug request for an interface that
 377                  * already exists.
 378                  *
 379                  * This can happen in cases like:
 380                  * - bootrom loading the firmware image and booting into that,
 381                  *   which only generates a hotplug event. i.e. no hot-unplug
 382                  *   event.
 383                  * - Or the firmware on the module crashed and sent hotplug
 384                  *   request again to the SVC, which got propagated to AP.
 385                  *
 386                  * Remove the interface and add it again, and let user know
 387                  * about this with a print message.
 388                  */
 389                 dev_info(dev, "Removed interface (%hhu) to add it again\n",
 390                          intf_id);
 391                 svc_intf_remove(connection, intf);
 392         }
 393
 394         intf = gb_interface_create(hd, intf_id);
 395         if (!intf) {
 396                 dev_err(dev, "%s: Failed to create interface with id %hhu\n",
 397                         __func__, intf_id);
 398                 goto free_svc_hotplug;
 399         }
 400
 401         intf->unipro_mfg_id = le32_to_cpu(hotplug->data.unipro_mfg_id);
 402         intf->unipro_prod_id = le32_to_cpu(hotplug->data.unipro_prod_id);
 403         intf->ara_vend_id = le32_to_cpu(hotplug->data.ara_vend_id);
 404         intf->ara_prod_id = le32_to_cpu(hotplug->data.ara_prod_id);
 405
 406         /*
 407          * Create a device id for the interface:
 408          * - device id 0 (GB_DEVICE_ID_SVC) belongs to the SVC
 409          * - device id 1 (GB_DEVICE_ID_AP) belongs to the AP
 410          *
 411          * XXX Do we need to allocate device ID for SVC or the AP here? And what
 412          * XXX about an AP with multiple interface blocks?
 413          */
 414         device_id = ida_simple_get(&svc->device_id_map,
 415                                    GB_DEVICE_ID_MODULES_START, 0, GFP_KERNEL);
 416         if (device_id < 0) {
 417                 ret = device_id;
 418                 dev_err(dev, "%s: Failed to allocate device id for interface with id %hhu (%d)\n",
 419                         __func__, intf_id, ret);
 420                 goto destroy_interface;
 421         }
 422
 423         ret = gb_svc_intf_device_id(svc, intf_id, device_id);
 424         if (ret) {
 425                 dev_err(dev, "%s: Device id operation failed, interface %hhu device_id %hhu (%d)\n",
 426                         __func__, intf_id, device_id, ret);
 427                 goto ida_put;
 428         }
 429
 430         /*
 431          * Create a two-way route between the AP and the new interface
 432          */
 433         ret = gb_svc_route_create(svc, hd->endo->ap_intf_id, GB_DEVICE_ID_AP,
 434                                   intf_id, device_id);
 435         if (ret) {
 436                 dev_err(dev, "%s: Route create operation failed, interface %hhu device_id %hhu (%d)\n",
 437                         __func__, intf_id, device_id, ret);
 438                 goto svc_id_free;
 439         }
 440
 441         ret = gb_interface_init(intf, device_id);
 442         if (ret) {
 443                 dev_err(dev, "%s: Failed to initialize interface, interface %hhu device_id %hhu (%d)\n",
 444                         __func__, intf_id, device_id, ret);
 445                 goto destroy_route;
 446         }
 447
 448         goto free_svc_hotplug;
 449
 450 destroy_route:
 451         gb_svc_route_destroy(svc, hd->endo->ap_intf_id, intf_id);
 452 svc_id_free:
 453         /*
 454          * XXX Should we tell SVC that this id doesn't belong to interface
 455          * XXX anymore.
 456          */
 457 ida_put:
 458         ida_simple_remove(&svc->device_id_map, device_id);
 459 destroy_interface:
 460         gb_interface_remove(hd, intf_id);
 461 free_svc_hotplug:
 462         kfree(svc_hotplug);
 463 }
 464
 465 /*
 466  * Bringing up a module can be time consuming, as that may require lots of
 467  * initialization on the module side. Over that, we may also need to download
 468  * the firmware first and flash that on the module.
 469  *
 470  * In order to make other hotplug events to not wait for all this to finish,
 471  * handle most of module hotplug stuff outside of the hotplug callback, with
 472  * help of a workqueue.
 473  */
 474 static int gb_svc_intf_hotplug_recv(struct gb_operation *op)
 475 {
 476         struct gb_message *request = op->request;
 477         struct svc_hotplug *svc_hotplug;
 478
 479         if (request->payload_size < sizeof(svc_hotplug->data)) {
 480                 dev_err(&op->connection->dev,
 481                         "%s: short hotplug request received (%zu < %zu)\n",
 482                         __func__, request->payload_size,
 483                         sizeof(svc_hotplug->data));
 484                 return -EINVAL;
 485         }
 486
 487         svc_hotplug = kmalloc(sizeof(*svc_hotplug), GFP_KERNEL);
 488         if (!svc_hotplug)
 489                 return -ENOMEM;
 490
 491         svc_hotplug->connection = op->connection;
 492         memcpy(&svc_hotplug->data, op->request->payload, sizeof(svc_hotplug->data));
 493
 494         INIT_WORK(&svc_hotplug->work, svc_process_hotplug);
 495         queue_work(system_unbound_wq, &svc_hotplug->work);
 496
 497         return 0;
 498 }
 499
 500 static int gb_svc_intf_hot_unplug_recv(struct gb_operation *op)
 501 {
 502         struct gb_message *request = op->request;
 503         struct gb_svc_intf_hot_unplug_request *hot_unplug = request->payload;
 504         struct greybus_host_device *hd = op->connection->hd;
 505         struct device *dev = &op->connection->dev;
 506         struct gb_interface *intf;
 507         u8 intf_id;
 508
 509         if (request->payload_size < sizeof(*hot_unplug)) {
 510                 dev_err(dev, "short hot unplug request received (%zu < %zu)\n",
 511                         request->payload_size, sizeof(*hot_unplug));
 512                 return -EINVAL;
 513         }
 514
 515         intf_id = hot_unplug->intf_id;
 516
 517         intf = gb_interface_find(hd, intf_id);
 518         if (!intf) {
 519                 dev_err(dev, "%s: Couldn't find interface for id %hhu\n",
 520                         __func__, intf_id);
 521                 return -EINVAL;
 522         }
 523
 524         svc_intf_remove(op->connection, intf);
 525
 526         return 0;
 527 }
 528
 529 static int gb_svc_intf_reset_recv(struct gb_operation *op)
 530 {
 531         struct gb_message *request = op->request;
 532         struct gb_svc_intf_reset_request *reset;
 533         u8 intf_id;
 534
 535         if (request->payload_size < sizeof(*reset)) {
 536                 dev_err(&op->connection->dev,
 537                         "short reset request received (%zu < %zu)\n",
 538                         request->payload_size, sizeof(*reset));
 539                 return -EINVAL;
 540         }
 541         reset = request->payload;
 542
 543         intf_id = reset->intf_id;
 544
 545         /* FIXME Reset the interface here */
 546
 547         return 0;
 548 }
 549
 550 static int gb_svc_request_recv(u8 type, struct gb_operation *op)
 551 {
 552         struct gb_connection *connection = op->connection;
 553         struct gb_svc *svc = connection->private;
 554         int ret = 0;
 555
 556         /*
 557          * SVC requests need to follow a specific order (at least initially) and
 558          * below code takes care of enforcing that. The expected order is:
 559          * - PROTOCOL_VERSION
 560          * - SVC_HELLO
 561          * - Any other request, but the earlier two.
 562          *
 563          * Incoming requests are guaranteed to be serialized and so we don't
 564          * need to protect 'state' for any races.
 565          */
 566         switch (type) {
 567         case GB_REQUEST_TYPE_PROTOCOL_VERSION:
 568                 if (svc->state != GB_SVC_STATE_RESET)
 569                         ret = -EINVAL;
 570                 break;
 571         case GB_SVC_TYPE_SVC_HELLO:
 572                 if (svc->state != GB_SVC_STATE_PROTOCOL_VERSION)
 573                         ret = -EINVAL;
 574                 break;
 575         default:
 576                 if (svc->state != GB_SVC_STATE_SVC_HELLO)
 577                         ret = -EINVAL;
 578                 break;
 579         }
 580
 581         if (ret) {
 582                 dev_warn(&connection->dev,
 583                          "unexpected SVC request 0x%02x received (state %u)\n",
 584                          type, svc->state);
 585                 return ret;
 586         }
 587
 588         switch (type) {
 589         case GB_REQUEST_TYPE_PROTOCOL_VERSION:
 590                 ret = gb_svc_version_request(op);
 591                 if (!ret)
 592                         svc->state = GB_SVC_STATE_PROTOCOL_VERSION;
 593                 return ret;
 594         case GB_SVC_TYPE_SVC_HELLO:
 595                 ret = gb_svc_hello(op);
 596                 if (!ret)
 597                         svc->state = GB_SVC_STATE_SVC_HELLO;
 598                 return ret;
 599         case GB_SVC_TYPE_INTF_HOTPLUG:
 600                 return gb_svc_intf_hotplug_recv(op);
 601         case GB_SVC_TYPE_INTF_HOT_UNPLUG:
 602                 return gb_svc_intf_hot_unplug_recv(op);
 603         case GB_SVC_TYPE_INTF_RESET:
 604                 return gb_svc_intf_reset_recv(op);
 605         default:
 606                 dev_err(&op->connection->dev,
 607                         "unsupported request: %hhu\n", type);
 608                 return -EINVAL;
 609         }
 610 }
 611
 612 static int gb_svc_connection_init(struct gb_connection *connection)
 613 {
 614         struct gb_svc *svc;
 615
 616         svc = kzalloc(sizeof(*svc), GFP_KERNEL);
 617         if (!svc)
 618                 return -ENOMEM;
 619
 620         connection->hd->svc = svc;
 621         svc->state = GB_SVC_STATE_RESET;
 622         svc->connection = connection;
 623         connection->private = svc;
 624
 625         WARN_ON(connection->hd->initial_svc_connection);
 626         connection->hd->initial_svc_connection = connection;
 627
 628         ida_init(&svc->device_id_map);
 629
 630         return 0;
 631 }
 632
 633 static void gb_svc_connection_exit(struct gb_connection *connection)
 634 {
 635         struct gb_svc *svc = connection->private;
 636
 637         ida_destroy(&svc->device_id_map);
 638         connection->hd->svc = NULL;
 639         connection->private = NULL;
 640         kfree(svc);
 641 }
 642
 643 static struct gb_protocol svc_protocol = {
 644         .name                   = "svc",
 645         .id                     = GREYBUS_PROTOCOL_SVC,
 646         .major                  = GB_SVC_VERSION_MAJOR,
 647         .minor                  = GB_SVC_VERSION_MINOR,
 648         .connection_init        = gb_svc_connection_init,
 649         .connection_exit        = gb_svc_connection_exit,
 650         .request_recv           = gb_svc_request_recv,
 651         .flags                  = GB_PROTOCOL_SKIP_CONTROL_CONNECTED |
 652                                   GB_PROTOCOL_SKIP_CONTROL_DISCONNECTED |
 653                                   GB_PROTOCOL_NO_BUNDLE |
 654                                   GB_PROTOCOL_SKIP_VERSION |
 655                                   GB_PROTOCOL_SKIP_SVC_CONNECTION,
 656 };
 657 gb_builtin_protocol_driver(svc_protocol);