include/soc/imx8/sc/ipc.h

/*
 * Copyright (C) 2016 Freescale Semiconductor, Inc.
 * Copyright 2017 NXP
 *
 * SPDX-License-Identifier:     GPL-2.0+
 */

/*!
 * Header file for the IPC implementation.
 */

#ifndef _SC_IPC_H
#define _SC_IPC_H

/* Includes */

#include <linux/thermal.h>
#include <soc/imx8/sc/types.h>

/* Defines */

/* Types */

/* Functions */

/*!
 * This function opens an IPC channel.
 *
 * @param[out]    ipc         return pointer for ipc handle
 * @param[in]     id          id of channel to open
 *
 * @return Returns an error code (SC_ERR_NONE = success, SC_ERR_IPC
 *         otherwise).
 *
 * The \a id parameter is implementation specific. Could be an MU
 * address, pointer to a driver path, channel index, etc.
 */
sc_err_t sc_ipc_open(sc_ipc_t *ipc, sc_ipc_id_t id);

/*!
 * This function closes an IPC channel.
 *
 * @param[in]     ipc         id of channel to close
 */
void sc_ipc_close(sc_ipc_t ipc);

/*!
 * This function reads a message from an IPC channel.
 *
 * @param[in]     ipc         id of channel read from
 * @param[out]    data        pointer to message buffer to read
 *
 * This function will block if no message is available to be read.
 */
void sc_ipc_read(sc_ipc_t ipc, void *data);

/*!
 * This function writes a message to an IPC channel.
 *
 * @param[in]     ipc         id of channel to write to
 * @param[in]     data        pointer to message buffer to write
 *
 * This function will block if the outgoing buffer is full.
 */
void sc_ipc_write(sc_ipc_t ipc, void *data);

int register_scu_notifier(struct notifier_block *nb);
int unregister_scu_notifier(struct notifier_block *nb);

#endif /* _SC_IPC_H */