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/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2013-2014 Linaro Ltd.
 * Author: Jassi Brar <jassisinghbrar@gmail.com>
 */

#ifndef __MAILBOX_CLIENT_H
#define __MAILBOX_CLIENT_H

#include <linux/of.h>
#include <linux/device.h>

struct mbox_chan;

/**
 * struct mbox_client - User of a mailbox
 * @dev:		The client device
 * @tx_block:		If the mbox_send_message should block until data is
 *			transmitted.
 * @tx_tout:		Max block period in ms before TX is assumed failure
 * @knows_txdone:	If the client could run the TX state machine. Usually
 *			if the client receives some ACK packet for transmission.
 *			Unused if the controller already has TX_Done/RTR IRQ.
 * @rx_callback:	Atomic callback to provide client the data received
 * @tx_prepare: 	Atomic callback to ask client to prepare the payload
 *			before initiating the transmission if required.
 * @tx_done:		Atomic callback to tell client of data transmission
 */
struct mbox_client {
	struct device *dev;
	bool tx_block;
	unsigned long tx_tout;
	bool knows_txdone;

	void (*rx_callback)(struct mbox_client *cl, void *mssg);
	void (*tx_prepare)(struct mbox_client *cl, void *mssg);
	void (*tx_done)(struct mbox_client *cl, void *mssg, int r);
};

struct mbox_chan *mbox_request_channel_byname(struct mbox_client *cl,
					      const char *name);
struct mbox_chan *mbox_request_channel(struct mbox_client *cl, int index);
int mbox_se