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mei.h
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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/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()) the communication between * the clients is 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 is 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 with * on the tagged channel. * Upone 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 protocool 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 */