cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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mailbox_client.h (1754B)


      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Copyright (C) 2013-2014 Linaro Ltd.
      4 * Author: Jassi Brar <jassisinghbrar@gmail.com>
      5 */
      6
      7#ifndef __MAILBOX_CLIENT_H
      8#define __MAILBOX_CLIENT_H
      9
     10#include <linux/of.h>
     11#include <linux/device.h>
     12
     13struct 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
     25 * @tx_prepare: 	Atomic callback to ask client to prepare the payload
     26 *			before initiating the transmission if required.
     27 * @tx_done:		Atomic callback to tell client of data transmission
     28 */
     29struct 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);
     36	void (*tx_prepare)(struct mbox_client *cl, void *mssg);
     37	void (*tx_done)(struct mbox_client *cl, void *mssg, int r);
     38};
     39
     40struct mbox_chan *mbox_request_channel_byname(struct mbox_client *cl,
     41					      const char *name);
     42struct mbox_chan *mbox_request_channel(struct mbox_client *cl, int index);
     43int mbox_send_message(struct mbox_chan *chan, void *mssg);
     44int mbox_flush(struct mbox_chan *chan, unsigned long timeout);
     45void mbox_client_txdone(struct mbox_chan *chan, int r); /* atomic */
     46bool mbox_client_peek_data(struct mbox_chan *chan); /* atomic */
     47void mbox_free_channel(struct mbox_chan *chan); /* may sleep */
     48
     49#endif /* __MAILBOX_CLIENT_H */