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// 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/types.h>
/**
* 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 {
u8 type;
u16 txn_id;
u16 msg_id;
u16 msg_len;
} __packed;
#define QMI_REQUEST 0
#define QMI_RESPONSE 2
#define QMI_INDICATION 4
#define QMI_COMMON_TLV_TYPE 0
enum qmi_elem_type {
QMI_EOTI,
QMI_OPT_FLAG,
QMI_DATA_LEN,
QMI_UNSIGNED_1_BYTE,
QMI_UNSIGNED_2_BYTE,
QMI_UNSIGNED_4_BYTE,
QMI_UNSIGNED_8_BYTE,
QMI_SIGNED_2_BYTE_ENUM,
QMI_SIGNED_4_BYTE_ENUM,
QMI_STRUCT,
QMI_STRING,
};
enum qmi_array_type {
NO_ARRAY,
STATIC_ARRAY,
VAR_LEN_ARRAY,
};
/**
* 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 {
enum qmi_elem_type data_type;
u32 elem_len;
u32 elem_size;
enum qmi_array_type array_type;
u8 tlv_type;
u32 offset;
struct qmi_elem_info *ei_array;
};
#define QMI_RESULT_SUCCESS_V01 0
#define QMI_RESULT_FAILURE_V01 1
#define QMI_ERR_NONE_V01 0
#define QMI_ERR_MALFORMED_MSG_V01 1
#define QMI_ERR_NO_MEMORY_V01 2
#define QMI_ERR_INTERNAL_V01 3
#define QMI_ERR_CLIENT_IDS_EXHAUSTED_V01 5
#define QMI_ERR_INVALID_ID_V01 41
#define QMI_ERR_ENCODING_V01 58
#define QMI_ERR_INCOMPATIBLE_STATE_V01 90
#define QMI_ERR_NOT_SUPPORTED_V01 94
/**
* 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 {
u16 result;
u16 error;
};
extern struct qmi_elem_info qmi_response_type_v01_ei[];
void *qmi_encode_message(int type, unsigned int msg_id, size_t *len,
unsigned int txn_id, struct qmi_elem_info *ei,
const void *c_struct);
int qmi_decode_message(const void *buf, size_t len,
struct qmi_elem_info *ei, void *c_struct);
#endif
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