// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved. * Copyright (c) 2017, Linaro Ltd. */ #ifndef __QMI_HELPERS_H__ #define __QMI_HELPERS_H__ #include <linux/completion.h> #include <linux/idr.h> #include <linux/list.h> #include <linux/qrtr.h> #include <linux/types.h> #include <linux/workqueue.h> struct socket; /** * struct qmi_header - wireformat header of QMI messages * @type: type of message * @txn_id: transaction id * @msg_id: message id * @msg_len: length of message payload following header */ struct qmi_header { … } __packed; #define QMI_REQUEST … #define QMI_RESPONSE … #define QMI_INDICATION … #define QMI_COMMON_TLV_TYPE … enum qmi_elem_type { … }; enum qmi_array_type { … }; /** * struct qmi_elem_info - describes how to encode a single QMI element * @data_type: Data type of this element. * @elem_len: Array length of this element, if an array. * @elem_size: Size of a single instance of this data type. * @array_type: Array type of this element. * @tlv_type: QMI message specific type to identify which element * is present in an incoming message. * @offset: Specifies the offset of the first instance of this * element in the data structure. * @ei_array: Null-terminated array of @qmi_elem_info to describe nested * structures. */ struct qmi_elem_info { … }; #define QMI_RESULT_SUCCESS_V01 … #define QMI_RESULT_FAILURE_V01 … #define QMI_ERR_NONE_V01 … #define QMI_ERR_MALFORMED_MSG_V01 … #define QMI_ERR_NO_MEMORY_V01 … #define QMI_ERR_INTERNAL_V01 … #define QMI_ERR_CLIENT_IDS_EXHAUSTED_V01 … #define QMI_ERR_INVALID_ID_V01 … #define QMI_ERR_ENCODING_V01 … #define QMI_ERR_DISABLED_V01 … #define QMI_ERR_INCOMPATIBLE_STATE_V01 … #define QMI_ERR_NOT_SUPPORTED_V01 … /** * struct qmi_response_type_v01 - common response header (decoded) * @result: result of the transaction * @error: error value, when @result is QMI_RESULT_FAILURE_V01 */ struct qmi_response_type_v01 { … }; extern const struct qmi_elem_info qmi_response_type_v01_ei[]; /** * struct qmi_service - context to track lookup-results * @service: service type * @version: version of the @service * @instance: instance id of the @service * @node: node of the service * @port: port of the service * @priv: handle for client's use * @list_node: list_head for house keeping */ struct qmi_service { … }; struct qmi_handle; /** * struct qmi_ops - callbacks for qmi_handle * @new_server: inform client of a new_server lookup-result, returning * successfully from this call causes the library to call * @del_server as the service is removed from the * lookup-result. @priv of the qmi_service can be used by * the client * @del_server: inform client of a del_server lookup-result * @net_reset: inform client that the name service was restarted and * that and any state needs to be released * @msg_handler: invoked for incoming messages, allows a client to * override the usual QMI message handler * @bye: inform a client that all clients from a node are gone * @del_client: inform a client that a particular client is gone */ struct qmi_ops { … }; /** * struct qmi_txn - transaction context * @qmi: QMI handle this transaction is associated with * @id: transaction id * @lock: for synchronization between handler and waiter of messages * @completion: completion object as the transaction receives a response * @result: result code for the completed transaction * @ei: description of the QMI encoded response (optional) * @dest: destination buffer to decode message into (optional) */ struct qmi_txn { … }; /** * struct qmi_msg_handler - description of QMI message handler * @type: type of message * @msg_id: message id * @ei: description of the QMI encoded message * @decoded_size: size of the decoded object * @fn: function to invoke as the message is decoded */ struct qmi_msg_handler { … }; /** * struct qmi_handle - QMI context * @sock: socket handle * @sock_lock: synchronization of @sock modifications * @sq: sockaddr of @sock * @work: work for handling incoming messages * @wq: workqueue to post @work on * @recv_buf: scratch buffer for handling incoming messages * @recv_buf_size: size of @recv_buf * @lookups: list of registered lookup requests * @lookup_results: list of lookup-results advertised to the client * @services: list of registered services (by this client) * @ops: reference to callbacks * @txns: outstanding transactions * @txn_lock: lock for modifications of @txns * @handlers: list of handlers for incoming messages */ struct qmi_handle { … }; int qmi_add_lookup(struct qmi_handle *qmi, unsigned int service, unsigned int version, unsigned int instance); int qmi_add_server(struct qmi_handle *qmi, unsigned int service, unsigned int version, unsigned int instance); int qmi_handle_init(struct qmi_handle *qmi, size_t max_msg_len, const struct qmi_ops *ops, const struct qmi_msg_handler *handlers); void qmi_handle_release(struct qmi_handle *qmi); ssize_t qmi_send_request(struct qmi_handle *qmi, struct sockaddr_qrtr *sq, struct qmi_txn *txn, int msg_id, size_t len, const struct qmi_elem_info *ei, const void *c_struct); ssize_t qmi_send_response(struct qmi_handle *qmi, struct sockaddr_qrtr *sq, struct qmi_txn *txn, int msg_id, size_t len, const struct qmi_elem_info *ei, const void *c_struct); ssize_t qmi_send_indication(struct qmi_handle *qmi, struct sockaddr_qrtr *sq, int msg_id, size_t len, const struct qmi_elem_info *ei, const void *c_struct); void *qmi_encode_message(int type, unsigned int msg_id, size_t *len, unsigned int txn_id, const struct qmi_elem_info *ei, const void *c_struct); int qmi_decode_message(const void *buf, size_t len, const struct qmi_elem_info *ei, void *c_struct); int qmi_txn_init(struct qmi_handle *qmi, struct qmi_txn *txn, const struct qmi_elem_info *ei, void *c_struct); int qmi_txn_wait(struct qmi_txn *txn, unsigned long timeout); void qmi_txn_cancel(struct qmi_txn *txn); #endif
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