Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 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 | |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 10 | #include "greybus.h" |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 11 | |
Perry Hung | 0b22649 | 2015-07-24 19:02:34 -0400 | [diff] [blame] | 12 | #define CPORT_FLAGS_E2EFC (1) |
| 13 | #define CPORT_FLAGS_CSD_N (2) |
| 14 | #define CPORT_FLAGS_CSV_N (4) |
| 15 | |
Viresh Kumar | b45864d | 2015-07-24 15:32:21 +0530 | [diff] [blame] | 16 | struct gb_svc { |
| 17 | struct gb_connection *connection; |
| 18 | u8 version_major; |
| 19 | u8 version_minor; |
| 20 | }; |
| 21 | |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 22 | static struct ida greybus_svc_device_id_map; |
| 23 | |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 24 | /* |
| 25 | * AP's SVC cport is required early to get messages from the SVC. This happens |
| 26 | * even before the Endo is created and hence any modules or interfaces. |
| 27 | * |
| 28 | * This is a temporary connection, used only at initial bootup. |
| 29 | */ |
| 30 | struct gb_connection * |
| 31 | gb_ap_svc_connection_create(struct greybus_host_device *hd) |
| 32 | { |
| 33 | struct gb_connection *connection; |
| 34 | |
| 35 | connection = gb_connection_create_range(hd, NULL, hd->parent, |
| 36 | GB_SVC_CPORT_ID, |
| 37 | GREYBUS_PROTOCOL_SVC, |
| 38 | GB_SVC_CPORT_ID, |
| 39 | GB_SVC_CPORT_ID + 1); |
| 40 | |
| 41 | return connection; |
| 42 | } |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 43 | |
| 44 | /* |
| 45 | * We know endo-type and AP's interface id now, lets create a proper svc |
| 46 | * connection (and its interface/bundle) now and get rid of the initial |
| 47 | * 'partially' initialized one svc connection. |
| 48 | */ |
| 49 | static struct gb_interface * |
| 50 | gb_ap_interface_create(struct greybus_host_device *hd, |
| 51 | struct gb_connection *connection, u8 interface_id) |
| 52 | { |
| 53 | struct gb_interface *intf; |
| 54 | struct device *dev = &hd->endo->dev; |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 55 | |
| 56 | intf = gb_interface_create(hd, interface_id); |
| 57 | if (!intf) { |
| 58 | dev_err(dev, "%s: Failed to create interface with id %hhu\n", |
| 59 | __func__, interface_id); |
| 60 | return NULL; |
| 61 | } |
| 62 | |
| 63 | intf->device_id = GB_DEVICE_ID_AP; |
Viresh Kumar | 67c93ae | 2015-07-24 15:32:19 +0530 | [diff] [blame] | 64 | svc_update_connection(intf, connection); |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 65 | |
Viresh Kumar | dcd0500 | 2015-07-24 15:32:20 +0530 | [diff] [blame] | 66 | /* Its no longer a partially initialized connection */ |
| 67 | hd->initial_svc_connection = NULL; |
| 68 | |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 69 | return intf; |
| 70 | } |
| 71 | |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 72 | static int intf_device_id_operation(struct gb_svc *svc, |
| 73 | u8 intf_id, u8 device_id) |
| 74 | { |
| 75 | struct gb_svc_intf_device_id_request request; |
| 76 | |
| 77 | request.intf_id = intf_id; |
| 78 | request.device_id = device_id; |
| 79 | |
| 80 | return gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_DEVICE_ID, |
| 81 | &request, sizeof(request), NULL, 0); |
| 82 | } |
| 83 | |
| 84 | static int intf_reset_operation(struct gb_svc *svc, u8 intf_id) |
| 85 | { |
| 86 | struct gb_svc_intf_reset_request request; |
| 87 | |
| 88 | request.intf_id = intf_id; |
| 89 | |
| 90 | return gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_RESET, |
| 91 | &request, sizeof(request), NULL, 0); |
| 92 | } |
| 93 | |
| 94 | static int connection_create_operation(struct gb_svc *svc, |
| 95 | u8 intf1_id, u16 cport1_id, |
| 96 | u8 intf2_id, u16 cport2_id) |
| 97 | { |
| 98 | struct gb_svc_conn_create_request request; |
| 99 | |
| 100 | request.intf1_id = intf1_id; |
| 101 | request.cport1_id = cport1_id; |
| 102 | request.intf2_id = intf2_id; |
| 103 | request.cport2_id = cport2_id; |
Perry Hung | 0b22649 | 2015-07-24 19:02:34 -0400 | [diff] [blame] | 104 | /* |
| 105 | * XXX: fix connections paramaters to TC0 and all CPort flags |
| 106 | * for now. |
| 107 | */ |
| 108 | request.tc = 0; |
| 109 | request.flags = CPORT_FLAGS_CSV_N | CPORT_FLAGS_E2EFC; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 110 | |
| 111 | return gb_operation_sync(svc->connection, GB_SVC_TYPE_CONN_CREATE, |
| 112 | &request, sizeof(request), NULL, 0); |
| 113 | } |
| 114 | |
| 115 | static int connection_destroy_operation(struct gb_svc *svc, |
| 116 | u8 intf1_id, u16 cport1_id, |
| 117 | u8 intf2_id, u16 cport2_id) |
| 118 | { |
| 119 | struct gb_svc_conn_destroy_request request; |
| 120 | |
| 121 | request.intf1_id = intf1_id; |
| 122 | request.cport1_id = cport1_id; |
| 123 | request.intf2_id = intf2_id; |
| 124 | request.cport2_id = cport2_id; |
| 125 | |
| 126 | return gb_operation_sync(svc->connection, GB_SVC_TYPE_CONN_DESTROY, |
| 127 | &request, sizeof(request), NULL, 0); |
| 128 | } |
| 129 | |
Perry Hung | e08aaa4 | 2015-07-24 19:02:31 -0400 | [diff] [blame] | 130 | static int route_create_operation(struct gb_svc *svc, u8 intf1_id, u8 dev1_id, |
| 131 | u8 intf2_id, u8 dev2_id) |
| 132 | { |
| 133 | struct gb_svc_route_create_request request; |
| 134 | |
| 135 | request.intf1_id = intf1_id; |
| 136 | request.dev1_id = dev1_id; |
| 137 | request.intf2_id = intf2_id; |
| 138 | request.dev2_id = dev2_id; |
| 139 | |
| 140 | return gb_operation_sync(svc->connection, GB_SVC_TYPE_ROUTE_CREATE, |
| 141 | &request, sizeof(request), NULL, 0); |
| 142 | } |
| 143 | |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 144 | int gb_svc_intf_device_id(struct gb_svc *svc, u8 intf_id, u8 device_id) |
| 145 | { |
| 146 | return intf_device_id_operation(svc, intf_id, device_id); |
| 147 | } |
| 148 | EXPORT_SYMBOL_GPL(gb_svc_intf_device_id); |
| 149 | |
| 150 | int gb_svc_intf_reset(struct gb_svc *svc, u8 intf_id) |
| 151 | { |
| 152 | return intf_reset_operation(svc, intf_id); |
| 153 | } |
| 154 | EXPORT_SYMBOL_GPL(gb_svc_intf_reset); |
| 155 | |
| 156 | int gb_svc_connection_create(struct gb_svc *svc, |
| 157 | u8 intf1_id, u16 cport1_id, |
| 158 | u8 intf2_id, u16 cport2_id) |
| 159 | { |
| 160 | return connection_create_operation(svc, intf1_id, cport1_id, |
| 161 | intf2_id, cport2_id); |
| 162 | } |
| 163 | EXPORT_SYMBOL_GPL(gb_svc_connection_create); |
| 164 | |
| 165 | int gb_svc_connection_destroy(struct gb_svc *svc, |
| 166 | u8 intf1_id, u16 cport1_id, |
| 167 | u8 intf2_id, u16 cport2_id) |
| 168 | { |
| 169 | return connection_destroy_operation(svc, intf1_id, cport1_id, |
| 170 | intf2_id, cport2_id); |
| 171 | } |
| 172 | EXPORT_SYMBOL_GPL(gb_svc_connection_destroy); |
| 173 | |
Perry Hung | e08aaa4 | 2015-07-24 19:02:31 -0400 | [diff] [blame] | 174 | int gb_svc_route_create(struct gb_svc *svc, u8 intf1_id, u8 dev1_id, |
Viresh Kumar | 03cb4fa | 2015-07-29 11:44:08 +0530 | [diff] [blame] | 175 | u8 intf2_id, u8 dev2_id) |
| 176 | { |
Perry Hung | e08aaa4 | 2015-07-24 19:02:31 -0400 | [diff] [blame] | 177 | return route_create_operation(svc, intf1_id, dev1_id, |
| 178 | intf2_id, dev2_id); |
| 179 | } |
| 180 | EXPORT_SYMBOL_GPL(gb_svc_route_create); |
| 181 | |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 182 | static int gb_svc_version_request(struct gb_operation *op) |
| 183 | { |
| 184 | struct gb_connection *connection = op->connection; |
| 185 | struct gb_protocol_version_response *version; |
| 186 | struct device *dev = &connection->dev; |
| 187 | |
| 188 | version = op->request->payload; |
| 189 | |
| 190 | if (version->major > GB_SVC_VERSION_MAJOR) { |
| 191 | dev_err(&connection->dev, |
| 192 | "unsupported major version (%hhu > %hhu)\n", |
| 193 | version->major, GB_SVC_VERSION_MAJOR); |
| 194 | return -ENOTSUPP; |
| 195 | } |
| 196 | |
| 197 | if (!gb_operation_response_alloc(op, sizeof(*version), GFP_KERNEL)) { |
| 198 | dev_err(dev, "%s: error allocating response\n", |
| 199 | __func__); |
| 200 | return -ENOMEM; |
| 201 | } |
| 202 | |
| 203 | version = op->response->payload; |
| 204 | version->major = GB_SVC_VERSION_MAJOR; |
| 205 | version->minor = GB_SVC_VERSION_MINOR; |
| 206 | return 0; |
| 207 | } |
| 208 | |
| 209 | static int gb_svc_hello(struct gb_operation *op) |
| 210 | { |
| 211 | struct gb_connection *connection = op->connection; |
| 212 | struct greybus_host_device *hd = connection->hd; |
| 213 | struct gb_svc_hello_request *hello_request; |
| 214 | struct device *dev = &connection->dev; |
| 215 | struct gb_interface *intf; |
| 216 | u16 endo_id; |
| 217 | u8 interface_id; |
| 218 | int ret; |
| 219 | |
| 220 | /* Hello message should be received only during early bootup */ |
| 221 | WARN_ON(hd->initial_svc_connection != connection); |
| 222 | |
| 223 | /* |
| 224 | * SVC sends information about the endo and interface-id on the hello |
| 225 | * request, use that to create an endo. |
| 226 | */ |
| 227 | if (op->request->payload_size != sizeof(*hello_request)) { |
Viresh Kumar | 155b9f1 | 2015-07-23 10:30:47 +0530 | [diff] [blame] | 228 | dev_err(dev, "%s: Illegal size of hello request (%zu %zu)\n", |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 229 | __func__, op->request->payload_size, |
| 230 | sizeof(*hello_request)); |
| 231 | return -EINVAL; |
| 232 | } |
| 233 | |
| 234 | hello_request = op->request->payload; |
| 235 | endo_id = le16_to_cpu(hello_request->endo_id); |
| 236 | interface_id = hello_request->interface_id; |
| 237 | |
| 238 | /* Setup Endo */ |
| 239 | ret = greybus_endo_setup(hd, endo_id, interface_id); |
| 240 | if (ret) |
| 241 | return ret; |
| 242 | |
| 243 | /* |
| 244 | * Endo and its modules are ready now, fix AP's partially initialized |
| 245 | * svc protocol and its connection. |
| 246 | */ |
| 247 | intf = gb_ap_interface_create(hd, connection, interface_id); |
| 248 | if (!intf) { |
| 249 | gb_endo_remove(hd->endo); |
| 250 | return ret; |
| 251 | } |
| 252 | |
| 253 | return 0; |
| 254 | } |
| 255 | |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 256 | static int gb_svc_intf_hotplug_recv(struct gb_operation *op) |
| 257 | { |
| 258 | struct gb_message *request = op->request; |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 259 | struct gb_svc_intf_hotplug_request *hotplug = request->payload; |
| 260 | struct gb_svc *svc = op->connection->private; |
| 261 | struct greybus_host_device *hd = op->connection->bundle->intf->hd; |
| 262 | struct device *dev = &op->connection->dev; |
| 263 | struct gb_interface *intf; |
| 264 | u8 intf_id, device_id; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 265 | u32 unipro_mfg_id; |
| 266 | u32 unipro_prod_id; |
| 267 | u32 ara_vend_id; |
| 268 | u32 ara_prod_id; |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 269 | int ret; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 270 | |
| 271 | if (request->payload_size < sizeof(*hotplug)) { |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 272 | dev_err(dev, "%s: short hotplug request received\n", __func__); |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 273 | return -EINVAL; |
| 274 | } |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 275 | |
| 276 | /* |
| 277 | * Grab the information we need. |
| 278 | * |
| 279 | * XXX I'd really like to acknowledge receipt, and then |
| 280 | * XXX continue processing the request. There's no need |
| 281 | * XXX for the SVC to wait. In fact, it might be best to |
| 282 | * XXX have the SVC get acknowledgement before we proceed. |
Viresh Kumar | 7eb8919 | 2015-07-01 12:13:50 +0530 | [diff] [blame] | 283 | */ |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 284 | intf_id = hotplug->intf_id; |
Phong Tran | ea15a40 | 2015-05-27 21:31:02 +0700 | [diff] [blame] | 285 | unipro_mfg_id = le32_to_cpu(hotplug->data.unipro_mfg_id); |
| 286 | unipro_prod_id = le32_to_cpu(hotplug->data.unipro_prod_id); |
| 287 | ara_vend_id = le32_to_cpu(hotplug->data.ara_vend_id); |
| 288 | ara_prod_id = le32_to_cpu(hotplug->data.ara_prod_id); |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 289 | |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 290 | // FIXME May require firmware download |
| 291 | intf = gb_interface_create(hd, intf_id); |
| 292 | if (!intf) { |
| 293 | dev_err(dev, "%s: Failed to create interface with id %hhu\n", |
| 294 | __func__, intf_id); |
| 295 | return -EINVAL; |
| 296 | } |
| 297 | |
| 298 | /* |
| 299 | * Create a device id for the interface: |
| 300 | * - device id 0 (GB_DEVICE_ID_SVC) belongs to the SVC |
| 301 | * - device id 1 (GB_DEVICE_ID_AP) belongs to the AP |
| 302 | * |
| 303 | * XXX Do we need to allocate device ID for SVC or the AP here? And what |
| 304 | * XXX about an AP with multiple interface blocks? |
| 305 | */ |
| 306 | device_id = ida_simple_get(&greybus_svc_device_id_map, |
| 307 | GB_DEVICE_ID_MODULES_START, 0, GFP_ATOMIC); |
| 308 | if (device_id < 0) { |
| 309 | ret = device_id; |
| 310 | dev_err(dev, "%s: Failed to allocate device id for interface with id %hhu (%d)\n", |
| 311 | __func__, intf_id, ret); |
| 312 | goto destroy_interface; |
| 313 | } |
| 314 | |
| 315 | ret = intf_device_id_operation(svc, intf_id, device_id); |
| 316 | if (ret) { |
| 317 | dev_err(dev, "%s: Device id operation failed, interface %hhu device_id %hhu (%d)\n", |
| 318 | __func__, intf_id, device_id, ret); |
| 319 | goto ida_put; |
| 320 | } |
| 321 | |
Perry Hung | 7e27546 | 2015-07-24 19:02:32 -0400 | [diff] [blame] | 322 | /* |
| 323 | * Create a two-way route between the AP and the new interface |
| 324 | */ |
| 325 | ret = route_create_operation(svc, hd->endo->ap_intf_id, |
| 326 | GB_DEVICE_ID_AP, intf_id, device_id); |
| 327 | if (ret) { |
| 328 | dev_err(dev, "%s: Route create operation failed, interface %hhu device_id %hhu (%d)\n", |
| 329 | __func__, intf_id, device_id, ret); |
| 330 | goto ida_put; |
| 331 | } |
| 332 | |
| 333 | ret = route_create_operation(svc, intf_id, device_id, |
| 334 | hd->endo->ap_intf_id, GB_DEVICE_ID_AP); |
| 335 | if (ret) { |
| 336 | dev_err(dev, "%s: Route create operation failed, interface %hhu device_id %hhu (%d)\n", |
| 337 | __func__, intf_id, device_id, ret); |
| 338 | goto ida_put; |
| 339 | } |
| 340 | |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 341 | ret = gb_interface_init(intf, device_id); |
| 342 | if (ret) { |
| 343 | dev_err(dev, "%s: Failed to initialize interface, interface %hhu device_id %hhu (%d)\n", |
| 344 | __func__, intf_id, device_id, ret); |
| 345 | goto svc_id_free; |
| 346 | } |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 347 | |
| 348 | return 0; |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 349 | |
| 350 | svc_id_free: |
| 351 | /* |
| 352 | * XXX Should we tell SVC that this id doesn't belong to interface |
| 353 | * XXX anymore. |
| 354 | */ |
| 355 | ida_put: |
| 356 | ida_simple_remove(&greybus_svc_device_id_map, device_id); |
| 357 | destroy_interface: |
| 358 | gb_interface_remove(hd, intf_id); |
| 359 | |
| 360 | return ret; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 361 | } |
| 362 | |
| 363 | static int gb_svc_intf_hot_unplug_recv(struct gb_operation *op) |
| 364 | { |
| 365 | struct gb_message *request = op->request; |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 366 | struct gb_svc_intf_hot_unplug_request *hot_unplug = request->payload; |
| 367 | struct greybus_host_device *hd = op->connection->bundle->intf->hd; |
| 368 | struct device *dev = &op->connection->dev; |
| 369 | u8 device_id; |
| 370 | struct gb_interface *intf; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 371 | u8 intf_id; |
| 372 | |
| 373 | if (request->payload_size < sizeof(*hot_unplug)) { |
| 374 | dev_err(&op->connection->dev, |
| 375 | "short hot unplug request received\n"); |
| 376 | return -EINVAL; |
| 377 | } |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 378 | |
| 379 | intf_id = hot_unplug->intf_id; |
| 380 | |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 381 | intf = gb_interface_find(hd, intf_id); |
| 382 | if (!intf) { |
| 383 | dev_err(dev, "%s: Couldn't find interface for id %hhu\n", |
| 384 | __func__, intf_id); |
| 385 | return -EINVAL; |
| 386 | } |
| 387 | |
| 388 | device_id = intf->device_id; |
| 389 | gb_interface_remove(hd, intf_id); |
| 390 | ida_simple_remove(&greybus_svc_device_id_map, device_id); |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 391 | |
| 392 | return 0; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 393 | } |
| 394 | |
| 395 | static int gb_svc_intf_reset_recv(struct gb_operation *op) |
| 396 | { |
| 397 | struct gb_message *request = op->request; |
| 398 | struct gb_svc_intf_reset_request *reset; |
| 399 | u8 intf_id; |
| 400 | |
| 401 | if (request->payload_size < sizeof(*reset)) { |
| 402 | dev_err(&op->connection->dev, |
| 403 | "short reset request received\n"); |
| 404 | return -EINVAL; |
| 405 | } |
| 406 | reset = request->payload; |
| 407 | |
| 408 | intf_id = reset->intf_id; |
| 409 | |
| 410 | /* FIXME Reset the interface here */ |
| 411 | |
| 412 | return 0; |
| 413 | } |
| 414 | |
| 415 | static int gb_svc_request_recv(u8 type, struct gb_operation *op) |
| 416 | { |
| 417 | switch (type) { |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 418 | case GB_SVC_TYPE_PROTOCOL_VERSION: |
| 419 | return gb_svc_version_request(op); |
| 420 | case GB_SVC_TYPE_SVC_HELLO: |
| 421 | return gb_svc_hello(op); |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 422 | case GB_SVC_TYPE_INTF_HOTPLUG: |
| 423 | return gb_svc_intf_hotplug_recv(op); |
| 424 | case GB_SVC_TYPE_INTF_HOT_UNPLUG: |
| 425 | return gb_svc_intf_hot_unplug_recv(op); |
| 426 | case GB_SVC_TYPE_INTF_RESET: |
| 427 | return gb_svc_intf_reset_recv(op); |
| 428 | default: |
| 429 | dev_err(&op->connection->dev, |
| 430 | "unsupported request: %hhu\n", type); |
| 431 | return -EINVAL; |
| 432 | } |
| 433 | } |
| 434 | |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 435 | static int gb_svc_connection_init(struct gb_connection *connection) |
| 436 | { |
| 437 | struct gb_svc *svc; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 438 | |
| 439 | svc = kzalloc(sizeof(*svc), GFP_KERNEL); |
| 440 | if (!svc) |
| 441 | return -ENOMEM; |
| 442 | |
Perry Hung | 75a60ed | 2015-07-24 19:02:33 -0400 | [diff] [blame] | 443 | connection->hd->svc = svc; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 444 | svc->connection = connection; |
| 445 | connection->private = svc; |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 446 | |
Viresh Kumar | dcd0500 | 2015-07-24 15:32:20 +0530 | [diff] [blame] | 447 | WARN_ON(connection->hd->initial_svc_connection); |
| 448 | connection->hd->initial_svc_connection = connection; |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 449 | |
| 450 | ida_init(&greybus_svc_device_id_map); |
| 451 | |
Viresh Kumar | 18d777c | 2015-07-21 17:44:20 +0530 | [diff] [blame] | 452 | return 0; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 453 | } |
| 454 | |
| 455 | static void gb_svc_connection_exit(struct gb_connection *connection) |
| 456 | { |
| 457 | struct gb_svc *svc = connection->private; |
| 458 | |
Perry Hung | 75a60ed | 2015-07-24 19:02:33 -0400 | [diff] [blame] | 459 | connection->hd->svc = NULL; |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 460 | connection->private = NULL; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 461 | kfree(svc); |
| 462 | } |
| 463 | |
| 464 | static struct gb_protocol svc_protocol = { |
| 465 | .name = "svc", |
| 466 | .id = GREYBUS_PROTOCOL_SVC, |
Viresh Kumar | 06e305f | 2015-07-01 12:13:51 +0530 | [diff] [blame] | 467 | .major = GB_SVC_VERSION_MAJOR, |
| 468 | .minor = GB_SVC_VERSION_MINOR, |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 469 | .connection_init = gb_svc_connection_init, |
| 470 | .connection_exit = gb_svc_connection_exit, |
| 471 | .request_recv = gb_svc_request_recv, |
| 472 | }; |
Viresh Kumar | ab69c4c | 2015-07-03 17:00:29 +0530 | [diff] [blame] | 473 | gb_builtin_protocol_driver(svc_protocol); |