Puja Gupta | 4f27f59 | 2017-02-24 17:19:38 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2012-2017, The Linux Foundation. All rights reserved. |
Karthikeyan Ramasubramanian | fafd67f1 | 2016-09-16 17:15:13 -0600 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #ifndef _MSM_QMI_INTERFACE_H_ |
| 14 | #define _MSM_QMI_INTERFACE_H_ |
| 15 | |
| 16 | #include <linux/types.h> |
| 17 | #include <linux/errno.h> |
| 18 | #include <linux/mm.h> |
| 19 | #include <linux/list.h> |
| 20 | #include <linux/socket.h> |
| 21 | #include <linux/gfp.h> |
| 22 | #include <linux/qmi_encdec.h> |
| 23 | #include <linux/workqueue.h> |
| 24 | |
| 25 | #define QMI_COMMON_TLV_TYPE 0 |
| 26 | |
| 27 | enum qmi_event_type { |
| 28 | QMI_RECV_MSG = 1, |
| 29 | QMI_SERVER_ARRIVE, |
| 30 | QMI_SERVER_EXIT, |
| 31 | }; |
| 32 | |
| 33 | /** |
| 34 | * struct qmi_handle - QMI Handle Data Structure |
| 35 | * @handle_hash: Hash Table Node in which this handle is present. |
| 36 | * @src_port: Pointer to port used for message exchange. |
| 37 | * @ctl_port: Pointer to port used for out-of-band event exchange. |
| 38 | * @handle_type: Type of handle(Service/Client). |
| 39 | * @next_txn_id: Transaction ID of the next outgoing request. |
| 40 | * @handle_wq: Workqueue to handle any handle-specific events. |
| 41 | * @handle_lock: Lock to protect access to elements in the handle. |
| 42 | * @notify_lock: Lock to protect and generate notification atomically. |
| 43 | * @notify: Function to notify the handle owner of an event. |
| 44 | * @notify_priv: Private info to be passed during the notifcation. |
| 45 | * @handle_reset: Flag to hold the reset state of the handle. |
| 46 | * @reset_waitq: Wait queue to wait for any reset events. |
| 47 | * @ctl_work: Work to handle the out-of-band events for this handle. |
| 48 | * @dest_info: Destination to which this handle is connected to. |
| 49 | * @dest_service_id: service id of the service that client connected to. |
| 50 | * @txn_list: List of transactions waiting for the response. |
| 51 | * @ind_cb: Function to notify the handle owner of an indication message. |
| 52 | * @ind_cb_priv: Private info to be passed during an indication notification. |
| 53 | * @resume_tx_work: Work to resume the tx when the transport is not busy. |
| 54 | * @pending_txn_list: List of requests pending tx due to busy transport. |
| 55 | * @conn_list: List of connections handled by the service. |
| 56 | * @svc_ops_options: Service specific operations and options. |
| 57 | */ |
| 58 | struct qmi_handle { |
| 59 | struct hlist_node handle_hash; |
| 60 | void *src_port; |
| 61 | void *ctl_port; |
| 62 | unsigned int handle_type; |
| 63 | uint16_t next_txn_id; |
| 64 | struct workqueue_struct *handle_wq; |
| 65 | struct mutex handle_lock; |
| 66 | spinlock_t notify_lock; |
| 67 | void (*notify)(struct qmi_handle *handle, enum qmi_event_type event, |
| 68 | void *notify_priv); |
| 69 | void *notify_priv; |
| 70 | int handle_reset; |
| 71 | wait_queue_head_t reset_waitq; |
| 72 | struct delayed_work ctl_work; |
| 73 | |
| 74 | /* Client specific elements */ |
| 75 | void *dest_info; |
| 76 | uint32_t dest_service_id; |
| 77 | struct list_head txn_list; |
| 78 | void (*ind_cb)(struct qmi_handle *handle, |
| 79 | unsigned int msg_id, void *msg, |
| 80 | unsigned int msg_len, void *ind_cb_priv); |
| 81 | void *ind_cb_priv; |
| 82 | struct delayed_work resume_tx_work; |
| 83 | struct list_head pending_txn_list; |
| 84 | |
| 85 | /* Service specific elements */ |
| 86 | struct list_head conn_list; |
| 87 | struct qmi_svc_ops_options *svc_ops_options; |
| 88 | }; |
| 89 | |
| 90 | enum qmi_result_type_v01 { |
| 91 | /* To force a 32 bit signed enum. Do not change or use*/ |
| 92 | QMI_RESULT_TYPE_MIN_ENUM_VAL_V01 = INT_MIN, |
| 93 | QMI_RESULT_SUCCESS_V01 = 0, |
| 94 | QMI_RESULT_FAILURE_V01 = 1, |
Karthikeyan Ramasubramanian | fafd67f1 | 2016-09-16 17:15:13 -0600 | [diff] [blame] | 95 | QMI_RESULT_TYPE_MAX_ENUM_VAL_V01 = INT_MAX, |
| 96 | }; |
| 97 | |
| 98 | enum qmi_error_type_v01 { |
| 99 | /* To force a 32 bit signed enum. Do not change or use*/ |
| 100 | QMI_ERR_TYPE_MIN_ENUM_VAL_V01 = INT_MIN, |
| 101 | QMI_ERR_NONE_V01 = 0x0000, |
| 102 | QMI_ERR_MALFORMED_MSG_V01 = 0x0001, |
| 103 | QMI_ERR_NO_MEMORY_V01 = 0x0002, |
| 104 | QMI_ERR_INTERNAL_V01 = 0x0003, |
| 105 | QMI_ERR_CLIENT_IDS_EXHAUSTED_V01 = 0x0005, |
| 106 | QMI_ERR_INVALID_ID_V01 = 0x0029, |
| 107 | QMI_ERR_ENCODING_V01 = 0x003A, |
Puja Gupta | 1c4c1f0 | 2017-05-15 11:15:07 -0700 | [diff] [blame] | 108 | QMI_ERR_DISABLED_V01 = 0x0045, |
Karthikeyan Ramasubramanian | fafd67f1 | 2016-09-16 17:15:13 -0600 | [diff] [blame] | 109 | QMI_ERR_INCOMPATIBLE_STATE_V01 = 0x005A, |
| 110 | QMI_ERR_NOT_SUPPORTED_V01 = 0x005E, |
| 111 | QMI_ERR_TYPE_MAX_ENUM_VAL_V01 = INT_MAX, |
| 112 | }; |
| 113 | |
| 114 | struct qmi_response_type_v01 { |
| 115 | enum qmi_result_type_v01 result; |
| 116 | enum qmi_error_type_v01 error; |
| 117 | }; |
| 118 | |
| 119 | /** |
| 120 | * qmi_svc_ops_options - Operations and options to be specified when |
| 121 | * a service registers. |
| 122 | * @version: Version field to identify the ops_options structure. |
| 123 | * @service_id: Service ID of the service. |
| 124 | * @service_vers: Version to identify the client-service compatibility. |
| 125 | * @service_ins: Instance ID registered by the service. |
| 126 | * @connect_cb: Callback when a new client connects with the service. |
| 127 | * @disconnect_cb: Callback when the client exits the connection. |
| 128 | * @req_desc_cb: Callback to get request structure and its descriptor |
| 129 | * for a message id. |
| 130 | * @req_cb: Callback to process the request. |
| 131 | */ |
| 132 | struct qmi_svc_ops_options { |
| 133 | unsigned int version; |
| 134 | uint32_t service_id; |
| 135 | uint32_t service_vers; |
| 136 | uint32_t service_ins; |
| 137 | int (*connect_cb)(struct qmi_handle *handle, |
| 138 | void *conn_handle); |
| 139 | int (*disconnect_cb)(struct qmi_handle *handle, |
| 140 | void *conn_handle); |
| 141 | int (*req_desc_cb)(unsigned int msg_id, |
| 142 | struct msg_desc **req_desc); |
| 143 | int (*req_cb)(struct qmi_handle *handle, |
| 144 | void *conn_handle, |
| 145 | void *req_handle, |
| 146 | unsigned int msg_id, |
| 147 | void *req); |
| 148 | }; |
| 149 | |
| 150 | #ifdef CONFIG_MSM_QMI_INTERFACE |
| 151 | |
| 152 | /* Element info array describing common qmi response structure */ |
| 153 | extern struct elem_info qmi_response_type_v01_ei[]; |
| 154 | #define get_qmi_response_type_v01_ei() qmi_response_type_v01_ei |
| 155 | |
| 156 | /** |
| 157 | * qmi_handle_create() - Create a QMI handle |
| 158 | * @notify: Callback to notify events on the handle created. |
| 159 | * @notify_priv: Private information to be passed along with the notification. |
| 160 | * |
| 161 | * @return: Valid QMI handle on success, NULL on error. |
| 162 | */ |
| 163 | struct qmi_handle *qmi_handle_create( |
| 164 | void (*notify)(struct qmi_handle *handle, |
| 165 | enum qmi_event_type event, void *notify_priv), |
| 166 | void *notify_priv); |
| 167 | |
| 168 | /** |
| 169 | * qmi_handle_destroy() - Destroy the QMI handle |
| 170 | * @handle: QMI handle to be destroyed. |
| 171 | * |
| 172 | * @return: 0 on success, < 0 on error. |
| 173 | */ |
| 174 | int qmi_handle_destroy(struct qmi_handle *handle); |
| 175 | |
| 176 | /** |
| 177 | * qmi_register_ind_cb() - Register the indication callback function |
| 178 | * @handle: QMI handle with which the function is registered. |
| 179 | * @ind_cb: Callback function to be registered. |
| 180 | * @ind_cb_priv: Private data to be passed with the indication callback. |
| 181 | * |
| 182 | * @return: 0 on success, < 0 on error. |
| 183 | */ |
| 184 | int qmi_register_ind_cb(struct qmi_handle *handle, |
| 185 | void (*ind_cb)(struct qmi_handle *handle, |
| 186 | unsigned int msg_id, void *msg, |
| 187 | unsigned int msg_len, void *ind_cb_priv), |
| 188 | void *ind_cb_priv); |
| 189 | |
| 190 | /** |
| 191 | * qmi_send_req_wait() - Send a synchronous QMI request |
| 192 | * @handle: QMI handle through which the QMI request is sent. |
| 193 | * @request_desc: Structure describing the request data structure. |
| 194 | * @req: Buffer containing the request data structure. |
| 195 | * @req_len: Length of the request data structure. |
| 196 | * @resp_desc: Structure describing the response data structure. |
| 197 | * @resp: Buffer to hold the response data structure. |
| 198 | * @resp_len: Length of the response data structure. |
| 199 | * @timeout_ms: Timeout before a response is received. |
| 200 | * |
| 201 | * @return: 0 on success, < 0 on error. |
| 202 | */ |
| 203 | int qmi_send_req_wait(struct qmi_handle *handle, |
| 204 | struct msg_desc *req_desc, |
| 205 | void *req, unsigned int req_len, |
| 206 | struct msg_desc *resp_desc, |
| 207 | void *resp, unsigned int resp_len, |
| 208 | unsigned long timeout_ms); |
| 209 | |
| 210 | /** |
| 211 | * qmi_send_req_nowait() - Send an asynchronous QMI request |
| 212 | * @handle: QMI handle through which the QMI request is sent. |
| 213 | * @request_desc: Structure describing the request data structure. |
| 214 | * @req: Buffer containing the request data structure. |
| 215 | * @req_len: Length of the request data structure. |
| 216 | * @resp_desc: Structure describing the response data structure. |
| 217 | * @resp: Buffer to hold the response data structure. |
| 218 | * @resp_len: Length of the response data structure. |
| 219 | * @resp_cb: Callback function to be invoked when the response arrives. |
| 220 | * @resp_cb_data: Private information to be passed along with the callback. |
| 221 | * |
| 222 | * @return: 0 on success, < 0 on error. |
| 223 | */ |
| 224 | int qmi_send_req_nowait(struct qmi_handle *handle, |
| 225 | struct msg_desc *req_desc, |
| 226 | void *req, unsigned int req_len, |
| 227 | struct msg_desc *resp_desc, |
| 228 | void *resp, unsigned int resp_len, |
| 229 | void (*resp_cb)(struct qmi_handle *handle, |
| 230 | unsigned int msg_id, void *msg, |
| 231 | void *resp_cb_data, |
| 232 | int stat), |
| 233 | void *resp_cb_data); |
| 234 | |
| 235 | /** |
| 236 | * qmi_recv_msg() - Receive the QMI message |
| 237 | * @handle: Handle for which the QMI message has to be received. |
| 238 | * |
| 239 | * @return: 0 on success, < 0 on error. |
| 240 | */ |
| 241 | int qmi_recv_msg(struct qmi_handle *handle); |
| 242 | |
| 243 | /** |
| 244 | * qmi_connect_to_service() - Connect the QMI handle with a QMI service |
| 245 | * @handle: QMI handle to be connected with the QMI service. |
| 246 | * @service_id: Service id to identify the QMI service. |
| 247 | * @service_vers: Version to identify the compatibility. |
| 248 | * @service_ins: Instance id to identify the instance of the QMI service. |
| 249 | * |
| 250 | * @return: 0 on success, < 0 on error. |
| 251 | */ |
| 252 | int qmi_connect_to_service(struct qmi_handle *handle, |
| 253 | uint32_t service_id, |
| 254 | uint32_t service_vers, |
| 255 | uint32_t service_ins); |
| 256 | |
| 257 | /** |
| 258 | * qmi_svc_event_notifier_register() - Register a notifier block to receive |
| 259 | * events regarding a QMI service |
| 260 | * @service_id: Service ID to identify the QMI service. |
| 261 | * @service_vers: Version to identify the compatibility. |
| 262 | * @service_ins: Instance ID to identify the instance of the QMI service. |
| 263 | * @nb: Notifier block used to receive the event. |
| 264 | * |
| 265 | * @return: 0 if successfully registered, < 0 on error. |
| 266 | */ |
| 267 | int qmi_svc_event_notifier_register(uint32_t service_id, |
| 268 | uint32_t service_vers, |
| 269 | uint32_t service_ins, |
| 270 | struct notifier_block *nb); |
| 271 | |
| 272 | /** |
| 273 | * qmi_svc_event_notifier_unregister() - Unregister service event |
| 274 | * notifier block |
| 275 | * @service_id: Service ID to identify the QMI service. |
| 276 | * @service_vers: Version to identify the compatibility. |
| 277 | * @service_ins: Instance ID to identify the instance of the QMI service. |
| 278 | * @nb: Notifier block registered to receive the events. |
| 279 | * |
| 280 | * @return: 0 if successfully registered, < 0 on error. |
| 281 | */ |
| 282 | int qmi_svc_event_notifier_unregister(uint32_t service_id, |
| 283 | uint32_t service_vers, |
| 284 | uint32_t service_ins, |
| 285 | struct notifier_block *nb); |
| 286 | |
| 287 | /** |
| 288 | * qmi_svc_register() - Register a QMI service with a QMI handle |
| 289 | * @handle: QMI handle on which the service has to be registered. |
| 290 | * @ops_options: Service specific operations and options. |
| 291 | * |
| 292 | * @return: 0 if successfully registered, < 0 on error. |
| 293 | */ |
| 294 | int qmi_svc_register(struct qmi_handle *handle, |
| 295 | void *ops_options); |
| 296 | |
| 297 | /** |
| 298 | * qmi_send_resp() - Send response to a request |
| 299 | * @handle: QMI handle from which the response is sent. |
| 300 | * @clnt: Client to which the response is sent. |
| 301 | * @req_handle: Request for which the response is sent. |
| 302 | * @resp_desc: Descriptor explaining the response structure. |
| 303 | * @resp: Pointer to the response structure. |
| 304 | * @resp_len: Length of the response structure. |
| 305 | * |
| 306 | * @return: 0 on success, < 0 on error. |
| 307 | */ |
| 308 | int qmi_send_resp(struct qmi_handle *handle, |
| 309 | void *conn_handle, |
| 310 | void *req_handle, |
| 311 | struct msg_desc *resp_desc, |
| 312 | void *resp, |
| 313 | unsigned int resp_len); |
| 314 | |
| 315 | /** |
| 316 | * qmi_send_resp_from_cb() - Send response to a request from request_cb |
| 317 | * @handle: QMI handle from which the response is sent. |
| 318 | * @clnt: Client to which the response is sent. |
| 319 | * @req_handle: Request for which the response is sent. |
| 320 | * @resp_desc: Descriptor explaining the response structure. |
| 321 | * @resp: Pointer to the response structure. |
| 322 | * @resp_len: Length of the response structure. |
| 323 | * |
| 324 | * @return: 0 on success, < 0 on error. |
| 325 | */ |
| 326 | int qmi_send_resp_from_cb(struct qmi_handle *handle, |
| 327 | void *conn_handle, |
| 328 | void *req_handle, |
| 329 | struct msg_desc *resp_desc, |
| 330 | void *resp, |
| 331 | unsigned int resp_len); |
| 332 | |
| 333 | /** |
| 334 | * qmi_send_ind() - Send unsolicited event/indication to a client |
| 335 | * @handle: QMI handle from which the indication is sent. |
| 336 | * @clnt: Client to which the indication is sent. |
| 337 | * @ind_desc: Descriptor explaining the indication structure. |
| 338 | * @ind: Pointer to the indication structure. |
| 339 | * @ind_len: Length of the indication structure. |
| 340 | * |
| 341 | * @return: 0 on success, < 0 on error. |
| 342 | */ |
| 343 | int qmi_send_ind(struct qmi_handle *handle, |
| 344 | void *conn_handle, |
| 345 | struct msg_desc *ind_desc, |
| 346 | void *ind, |
| 347 | unsigned int ind_len); |
| 348 | |
| 349 | /** |
| 350 | * qmi_send_ind_from_cb() - Send indication to a client from registration_cb |
| 351 | * @handle: QMI handle from which the indication is sent. |
| 352 | * @clnt: Client to which the indication is sent. |
| 353 | * @ind_desc: Descriptor explaining the indication structure. |
| 354 | * @ind: Pointer to the indication structure. |
| 355 | * @ind_len: Length of the indication structure. |
| 356 | * |
| 357 | * @return: 0 on success, < 0 on error. |
| 358 | */ |
| 359 | int qmi_send_ind_from_cb(struct qmi_handle *handle, |
| 360 | void *conn_handle, |
| 361 | struct msg_desc *ind_desc, |
| 362 | void *ind, |
| 363 | unsigned int ind_len); |
| 364 | |
| 365 | /** |
| 366 | * qmi_svc_unregister() - Unregister the service from a QMI handle |
| 367 | * @handle: QMI handle from which the service has to be unregistered. |
| 368 | * |
| 369 | * return: 0 on success, < 0 on error. |
| 370 | */ |
| 371 | int qmi_svc_unregister(struct qmi_handle *handle); |
| 372 | |
| 373 | #else |
| 374 | |
| 375 | #define get_qmi_response_type_v01_ei() NULL |
| 376 | |
| 377 | static inline struct qmi_handle *qmi_handle_create( |
| 378 | void (*notify)(struct qmi_handle *handle, |
| 379 | enum qmi_event_type event, void *notify_priv), |
| 380 | void *notify_priv) |
| 381 | { |
| 382 | return NULL; |
| 383 | } |
| 384 | |
| 385 | static inline int qmi_handle_destroy(struct qmi_handle *handle) |
| 386 | { |
| 387 | return -ENODEV; |
| 388 | } |
| 389 | |
| 390 | static inline int qmi_register_ind_cb(struct qmi_handle *handle, |
| 391 | void (*ind_cb)(struct qmi_handle *handle, |
| 392 | unsigned int msg_id, void *msg, |
| 393 | unsigned int msg_len, void *ind_cb_priv), |
| 394 | void *ind_cb_priv) |
| 395 | { |
| 396 | return -ENODEV; |
| 397 | } |
| 398 | |
| 399 | static inline int qmi_send_req_wait(struct qmi_handle *handle, |
| 400 | struct msg_desc *req_desc, |
| 401 | void *req, unsigned int req_len, |
| 402 | struct msg_desc *resp_desc, |
| 403 | void *resp, unsigned int resp_len, |
| 404 | unsigned long timeout_ms) |
| 405 | { |
| 406 | return -ENODEV; |
| 407 | } |
| 408 | |
| 409 | static inline int qmi_send_req_nowait(struct qmi_handle *handle, |
| 410 | struct msg_desc *req_desc, |
| 411 | void *req, unsigned int req_len, |
| 412 | struct msg_desc *resp_desc, |
| 413 | void *resp, unsigned int resp_len, |
| 414 | void (*resp_cb)(struct qmi_handle *handle, |
| 415 | unsigned int msg_id, void *msg, |
| 416 | void *resp_cb_data), |
| 417 | void *resp_cb_data) |
| 418 | { |
| 419 | return -ENODEV; |
| 420 | } |
| 421 | |
| 422 | static inline int qmi_recv_msg(struct qmi_handle *handle) |
| 423 | { |
| 424 | return -ENODEV; |
| 425 | } |
| 426 | |
| 427 | static inline int qmi_connect_to_service(struct qmi_handle *handle, |
| 428 | uint32_t service_id, |
| 429 | uint32_t service_vers, |
| 430 | uint32_t service_ins) |
| 431 | { |
| 432 | return -ENODEV; |
| 433 | } |
| 434 | |
| 435 | static inline int qmi_svc_event_notifier_register(uint32_t service_id, |
| 436 | uint32_t service_vers, |
| 437 | uint32_t service_ins, |
| 438 | struct notifier_block *nb) |
| 439 | { |
| 440 | return -ENODEV; |
| 441 | } |
| 442 | |
| 443 | static inline int qmi_svc_event_notifier_unregister(uint32_t service_id, |
| 444 | uint32_t service_vers, |
| 445 | uint32_t service_ins, |
| 446 | struct notifier_block *nb) |
| 447 | { |
| 448 | return -ENODEV; |
| 449 | } |
| 450 | |
| 451 | static inline int qmi_svc_register(struct qmi_handle *handle, |
| 452 | void *ops_options) |
| 453 | { |
| 454 | return -ENODEV; |
| 455 | } |
| 456 | |
| 457 | static inline int qmi_send_resp(struct qmi_handle *handle, |
| 458 | void *conn_handle, |
| 459 | void *req_handle, |
| 460 | struct msg_desc *resp_desc, |
| 461 | void *resp, |
| 462 | unsigned int resp_len) |
| 463 | { |
| 464 | return -ENODEV; |
| 465 | } |
| 466 | |
| 467 | static inline int qmi_send_resp_from_cb(struct qmi_handle *handle, |
| 468 | void *conn_handle, |
| 469 | void *req_handle, |
| 470 | struct msg_desc *resp_desc, |
| 471 | void *resp, |
| 472 | unsigned int resp_len) |
| 473 | { |
| 474 | return -ENODEV; |
| 475 | } |
| 476 | |
| 477 | static inline int qmi_send_ind(struct qmi_handle *handle, |
| 478 | void *conn_handle, |
| 479 | struct msg_desc *ind_desc, |
| 480 | void *ind, |
| 481 | unsigned int ind_len) |
| 482 | { |
| 483 | return -ENODEV; |
| 484 | } |
| 485 | |
| 486 | static inline int qmi_send_ind_from_cb(struct qmi_handle *handle, |
| 487 | void *conn_handle, |
| 488 | struct msg_desc *ind_desc, |
| 489 | void *ind, |
| 490 | unsigned int ind_len) |
| 491 | { |
| 492 | return -ENODEV; |
| 493 | } |
| 494 | |
| 495 | static inline int qmi_svc_unregister(struct qmi_handle *handle) |
| 496 | { |
| 497 | return -ENODEV; |
| 498 | } |
| 499 | |
| 500 | #endif |
| 501 | |
| 502 | #endif |