drivers/misc/mei/interface.h

/*
 *
 * Intel Management Engine Interface (Intel MEI) Linux driver
 * Copyright (c) 2003-2012, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 */



#ifndef _MEI_INTERFACE_H_
#define _MEI_INTERFACE_H_

#include <linux/mei.h>
#include "mei_dev.h"


#define AMT_WD_DEFAULT_TIMEOUT 120	/* seconds */
#define AMT_WD_MIN_TIMEOUT 120	/* seconds */
#define AMT_WD_MAX_TIMEOUT 65535	/* seconds */

#define MEI_WATCHDOG_DATA_SIZE         16
#define MEI_START_WD_DATA_SIZE         20
#define MEI_WD_PARAMS_SIZE             4


void mei_read_slots(struct mei_device *dev,
		     unsigned char *buffer,
		     unsigned long buffer_length);

int mei_write_message(struct mei_device *dev,
			     struct mei_msg_hdr *header,
			     unsigned char *write_buffer,
			     unsigned long write_length);

bool mei_hbuf_is_empty(struct mei_device *dev);

int mei_hbuf_empty_slots(struct mei_device *dev);

static inline size_t mei_hbuf_max_data(const struct mei_device *dev)
{
	return dev->hbuf_depth * sizeof(u32) - sizeof(struct mei_msg_hdr);
}

/* get slots (dwords) from a message length + header (bytes) */
static inline unsigned char mei_data2slots(size_t length)
{
	return DIV_ROUND_UP(sizeof(struct mei_msg_hdr) + length, 4);
}

int mei_count_full_read_slots(struct mei_device *dev);


int mei_flow_ctrl_creds(struct mei_device *dev, struct mei_cl *cl);



int mei_wd_send(struct mei_device *dev);
int mei_wd_stop(struct mei_device *dev, bool preserve);
int mei_wd_host_init(struct mei_device *dev);
/*
 * mei_watchdog_register  - Registering watchdog interface
 *   once we got connection to the WD Client
 * @dev - mei device
 */
void mei_watchdog_register(struct mei_device *dev);
/*
 * mei_watchdog_unregister  - Unregistering watchdog interface
 * @dev - mei device
 */
void mei_watchdog_unregister(struct mei_device *dev);

int mei_flow_ctrl_reduce(struct mei_device *dev, struct mei_cl *cl);

int mei_send_flow_control(struct mei_device *dev, struct mei_cl *cl);

int mei_disconnect(struct mei_device *dev, struct mei_cl *cl);
int mei_other_client_is_connecting(struct mei_device *dev, struct mei_cl *cl);
int mei_connect(struct mei_device *dev, struct mei_cl *cl);

#endif /* _MEI_INTERFACE_H_ */