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/* 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' , 0x01, 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', 0x02, __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', 0x03, __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', 0x04, struct mei_connect_client_data_vtag)
#endif /* _LINUX_MEI_H */
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