d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2013-2014 Linaro Ltd.
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* Author: Jassi Brar <jassisinghbrar@gmail.com>
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*/
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#ifndef __MAILBOX_CLIENT_H
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#define __MAILBOX_CLIENT_H
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#include <linux/of.h>
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#include <linux/device.h>
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struct mbox_chan;
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/**
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* struct mbox_client - User of a mailbox
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* @dev: The client device
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* @tx_block: If the mbox_send_message should block until data is
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* transmitted.
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* @tx_tout: Max block period in ms before TX is assumed failure
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* @knows_txdone: If the client could run the TX state machine. Usually
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* if the client receives some ACK packet for transmission.
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* Unused if the controller already has TX_Done/RTR IRQ.
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* @rx_callback: Atomic callback to provide client the data received
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* @tx_prepare: Atomic callback to ask client to prepare the payload
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* before initiating the transmission if required.
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* @tx_done: Atomic callback to tell client of data transmission
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*/
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struct mbox_client {
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struct device *dev;
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bool tx_block;
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unsigned long tx_tout;
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bool knows_txdone;
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void (*rx_callback)(struct mbox_client *cl, void *mssg);
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void (*tx_prepare)(struct mbox_client *cl, void *mssg);
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void (*tx_done)(struct mbox_client *cl, void *mssg, int r);
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};
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struct mbox_chan *mbox_request_channel_byname(struct mbox_client *cl,
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const char *name);
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struct mbox_chan *mbox_request_channel(struct mbox_client *cl, int index);
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int mbox_send_message(struct mbox_chan *chan, void *mssg);
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int mbox_flush(struct mbox_chan *chan, unsigned long timeout);
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void mbox_client_txdone(struct mbox_chan *chan, int r); /* atomic */
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bool mbox_client_peek_data(struct mbox_chan *chan); /* atomic */
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void mbox_free_channel(struct mbox_chan *chan); /* may sleep */
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#endif /* __MAILBOX_CLIENT_H */
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