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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 reader 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 Clients that do not support tagged connection will respond with -EOPNOTSUPP Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20200818115147.2567012-12-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
118 lines
3.4 KiB
C
118 lines
3.4 KiB
C
/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
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/*
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* Copyright(c) 2003-2015 Intel Corporation. All rights reserved.
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* Intel Management Engine Interface (Intel MEI) Linux driver
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* Intel MEI Interface Header
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*/
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#ifndef _LINUX_MEI_H
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#define _LINUX_MEI_H
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#include <linux/uuid.h>
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/*
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* This IOCTL is used to associate the current file descriptor with a
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* FW Client (given by UUID). This opens a communication channel
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* between a host client and a FW client. From this point every read and write
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* will communicate with the associated FW client.
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* Only in close() (file_operation release()) the communication between
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* the clients is disconnected
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*
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* The IOCTL argument is a struct with a union that contains
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* the input parameter and the output parameter for this IOCTL.
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*
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* The input parameter is UUID of the FW Client.
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* The output parameter is the properties of the FW client
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* (FW protocol version and max message size).
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*
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*/
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#define IOCTL_MEI_CONNECT_CLIENT \
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_IOWR('H' , 0x01, struct mei_connect_client_data)
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/*
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* Intel MEI client information struct
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*/
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struct mei_client {
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__u32 max_msg_length;
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__u8 protocol_version;
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__u8 reserved[3];
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};
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/*
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* IOCTL Connect Client Data structure
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*/
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struct mei_connect_client_data {
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union {
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uuid_le in_client_uuid;
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struct mei_client out_client_properties;
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};
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};
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/**
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* DOC: set and unset event notification for a connected client
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*
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* The IOCTL argument is 1 for enabling event notification and 0 for
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* disabling the service
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* Return: -EOPNOTSUPP if the devices doesn't support the feature
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*/
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#define IOCTL_MEI_NOTIFY_SET _IOW('H', 0x02, __u32)
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/**
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* DOC: retrieve notification
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*
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* The IOCTL output argument is 1 if an event was is pending and 0 otherwise
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* the ioctl has to be called in order to acknowledge pending event
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*
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* Return: -EOPNOTSUPP if the devices doesn't support the feature
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*/
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#define IOCTL_MEI_NOTIFY_GET _IOR('H', 0x03, __u32)
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/**
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* struct mei_connect_client_vtag - mei client information struct with vtag
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*
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* @in_client_uuid: UUID of client to connect
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* @vtag: virtual tag
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* @reserved: reserved for future use
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*/
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struct mei_connect_client_vtag {
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uuid_le in_client_uuid;
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__u8 vtag;
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__u8 reserved[3];
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};
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/**
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* struct mei_connect_client_data_vtag - IOCTL connect data union
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*
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* @connect: input connect data
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* @out_client_properties: output client data
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*/
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struct mei_connect_client_data_vtag {
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union {
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struct mei_connect_client_vtag connect;
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struct mei_client out_client_properties;
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};
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};
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/**
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* DOC:
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* This IOCTL is used to associate the current file descriptor with a
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* FW Client (given by UUID), and virtual tag (vtag).
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* The IOCTL opens a communication channel between a host client and
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* a FW client on a tagged channel. From this point on, every read
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* and write will communicate with the associated FW client with
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* on the tagged channel.
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* Upone close() the communication is terminated.
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*
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* The IOCTL argument is a struct with a union that contains
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* the input parameter and the output parameter for this IOCTL.
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*
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* The input parameter is UUID of the FW Client, a vtag [0,255]
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* The output parameter is the properties of the FW client
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* (FW protocool version and max message size).
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*
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* Clients that do not support tagged connection
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* will respond with -EOPNOTSUPP.
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*/
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#define IOCTL_MEI_CONNECT_CLIENT_VTAG \
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_IOWR('H', 0x04, struct mei_connect_client_data_vtag)
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#endif /* _LINUX_MEI_H */
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