/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
/*
* Copyright ( c ) 2003 - 2015 Intel Corporation . All rights reserved .
* Intel Management Engine Interface ( Intel MEI ) Linux driver
* Intel MEI Interface Header
*/
#ifndef _LINUX_MEI_H
#define _LINUX_MEI_H
#include <linux/mei_uuid.h>
/*
* This IOCTL is used to associate the current file descriptor with a
* FW Client ( given by UUID ) . This opens a communication channel
* between a host client and a FW client . From this point every read and write
* will communicate with the associated FW client .
* Only in close ( ) ( file_operation release ( ) ) is the communication between
* the clients disconnected .
*
* The IOCTL argument is a struct with a union that contains
* the input parameter and the output parameter for this IOCTL .
*
* The input parameter is UUID of the FW Client .
* The output parameter is the properties of the FW client
* ( FW protocol version and max message size ) .
*
*/
#define IOCTL_MEI_CONNECT_CLIENT \
_IOWR('H' , 0 x01, struct mei_connect_client_data)
/*
* Intel MEI client information struct
*/
struct mei_client {
__u32 max_msg_length;
__u8 protocol_version;
__u8 reserved[3 ];
};
/*
* IOCTL Connect Client Data structure
*/
struct mei_connect_client_data {
union {
uuid_le in_client_uuid;
struct mei_client out_client_properties;
};
};
/**
* DOC : set and unset event notification for a connected client
*
* The IOCTL argument is 1 for enabling event notification and 0 for
* disabling the service .
* Return : - EOPNOTSUPP if the devices doesn ' t support the feature
*/
#define IOCTL_MEI_NOTIFY_SET _IOW('H' , 0 x02, __u32)
/**
* DOC : retrieve notification
*
* The IOCTL output argument is 1 if an event was pending and 0 otherwise .
* The ioctl has to be called in order to acknowledge pending event .
*
* Return : - EOPNOTSUPP if the devices doesn ' t support the feature
*/
#define IOCTL_MEI_NOTIFY_GET _IOR('H' , 0 x03, __u32)
/**
* struct mei_connect_client_vtag - mei client information struct with vtag
*
* @ in_client_uuid : UUID of client to connect
* @ vtag : virtual tag
* @ reserved : reserved for future use
*/
struct mei_connect_client_vtag {
uuid_le in_client_uuid;
__u8 vtag;
__u8 reserved[3 ];
};
/**
* struct mei_connect_client_data_vtag - IOCTL connect data union
*
* @ connect : input connect data
* @ out_client_properties : output client data
*/
struct mei_connect_client_data_vtag {
union {
struct mei_connect_client_vtag connect;
struct mei_client out_client_properties;
};
};
/**
* DOC :
* This IOCTL is used to associate the current file descriptor with a
* FW Client ( given by UUID ) , and virtual tag ( vtag ) .
* The IOCTL opens a communication channel between a host client and
* a FW client on a tagged channel . From this point on , every read
* and write will communicate with the associated FW client
* on the tagged channel .
* Upon close ( ) the communication is terminated .
*
* The IOCTL argument is a struct with a union that contains
* the input parameter and the output parameter for this IOCTL .
*
* The input parameter is UUID of the FW Client , a vtag [ 0 , 255 ] .
* The output parameter is the properties of the FW client
* ( FW protocol version and max message size ) .
*
* Clients that do not support tagged connection
* will respond with - EOPNOTSUPP .
*/
#define IOCTL_MEI_CONNECT_CLIENT_VTAG \
_IOWR('H' , 0 x04, struct mei_connect_client_data_vtag)
#endif /* _LINUX_MEI_H */
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