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mailbox_client.h
/* 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); }; 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 */ void mbox_free_channel(struct mbox_chan *chan); /* may sleep */ #endif /* __MAILBOX_CLIENT_H */