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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152/* 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/device.h>#include <linux/of.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);};
int mbox_bind_client(struct mbox_chan *chan, struct mbox_client *cl);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_send_message(struct mbox_chan *chan, void *mssg);int mbox_flush(struct mbox_chan *chan, unsigned long timeout);void mbox_client_txdone(struct mbox_chan *chan, int r); /* atomic */bool mbox_client_peek_data(struct mbox_chan *chan); /* atomic */unsigned int mbox_chan_tx_slots_available(struct mbox_chan *chan); /* atomic */void mbox_free_channel(struct mbox_chan *chan); /* may sleep */
#endif /* __MAILBOX_CLIENT_H */