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d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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2 | /* |
3 | * Copyright (C) 2013-2014 Linaro Ltd. | |
4 | * Author: Jassi Brar <jassisinghbrar@gmail.com> | |
2b6d83e2 JB |
5 | */ |
6 | ||
7 | #ifndef __MAILBOX_CLIENT_H | |
8 | #define __MAILBOX_CLIENT_H | |
9 | ||
10 | #include <linux/of.h> | |
11 | #include <linux/device.h> | |
12 | ||
13 | struct mbox_chan; | |
14 | ||
15 | /** | |
16 | * struct mbox_client - User of a mailbox | |
17 | * @dev: The client device | |
18 | * @tx_block: If the mbox_send_message should block until data is | |
19 | * transmitted. | |
20 | * @tx_tout: Max block period in ms before TX is assumed failure | |
21 | * @knows_txdone: If the client could run the TX state machine. Usually | |
22 | * if the client receives some ACK packet for transmission. | |
23 | * Unused if the controller already has TX_Done/RTR IRQ. | |
24 | * @rx_callback: Atomic callback to provide client the data received | |
97b0c7bd SH |
25 | * @tx_prepare: Atomic callback to ask client to prepare the payload |
26 | * before initiating the transmission if required. | |
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27 | * @tx_done: Atomic callback to tell client of data transmission |
28 | */ | |
29 | struct mbox_client { | |
30 | struct device *dev; | |
31 | bool tx_block; | |
32 | unsigned long tx_tout; | |
33 | bool knows_txdone; | |
34 | ||
35 | void (*rx_callback)(struct mbox_client *cl, void *mssg); | |
97b0c7bd | 36 | void (*tx_prepare)(struct mbox_client *cl, void *mssg); |
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37 | void (*tx_done)(struct mbox_client *cl, void *mssg, int r); |
38 | }; | |
39 | ||
dfabde20 LJ |
40 | struct mbox_chan *mbox_request_channel_byname(struct mbox_client *cl, |
41 | const char *name); | |
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42 | struct mbox_chan *mbox_request_channel(struct mbox_client *cl, int index); |
43 | int mbox_send_message(struct mbox_chan *chan, void *mssg); | |
a8803d74 | 44 | int mbox_flush(struct mbox_chan *chan, unsigned long timeout); |
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45 | void mbox_client_txdone(struct mbox_chan *chan, int r); /* atomic */ |
46 | bool mbox_client_peek_data(struct mbox_chan *chan); /* atomic */ | |
47 | void mbox_free_channel(struct mbox_chan *chan); /* may sleep */ | |
48 | ||
49 | #endif /* __MAILBOX_CLIENT_H */ |