Release 4.16 drivers/visorbus/vbuschannel.h
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2010 - 2015 UNISYS CORPORATION
* All rights reserved.
*/
#ifndef __VBUSCHANNEL_H__
#define __VBUSCHANNEL_H__
/*
* The vbus channel is the channel area provided via the BUS_CREATE controlvm
* message for each virtual bus. This channel area is provided to both server
* and client ends of the bus. The channel header area is initialized by
* the server, and the remaining information is filled in by the client.
* We currently use this for the client to provide various information about
* the client devices and client drivers for the server end to see.
*/
#include <linux/uuid.h>
#include <linux/visorbus.h>
/* {193b331b-c58f-11da-95a9-00e08161165f} */
#define VISOR_VBUS_CHANNEL_GUID \
GUID_INIT(0x193b331b, 0xc58f, 0x11da, \
0x95, 0xa9, 0x0, 0xe0, 0x81, 0x61, 0x16, 0x5f)
/*
* Must increment this whenever you insert or delete fields within this channel
* struct. Also increment whenever you change the meaning of fields within this
* channel struct so as to break pre-existing software. Note that you can
* usually add fields to the END of the channel struct withOUT needing to
* increment this.
*/
#define VISOR_VBUS_CHANNEL_VERSIONID 1
/*
* struct visor_vbus_deviceinfo
* @devtype: Short string identifying the device type.
* @drvname: Driver .sys file name.
* @infostrs: Kernel vversion.
* @reserved: Pad size to 256 bytes.
*
* An array of this struct is present in the channel area for each vbus. It is
* filled in by the client side to provide info about the device and driver from
* the client's perspective.
*/
struct visor_vbus_deviceinfo {
u8 devtype[16];
u8 drvname[16];
u8 infostrs[96];
u8 reserved[128];
} __packed;
/*
* struct visor_vbus_headerinfo
* @struct_bytes: Size of this struct in bytes.
* @device_info_struct_bytes: Size of VISOR_VBUS_DEVICEINFO.
* @dev_info_count: Num of items in DevInfo member. This is the
* allocated size.
* @chp_info_offset: Byte offset from beginning of this struct to the
* ChpInfo struct.
* @bus_info_offset: Byte offset from beginning of this struct to the
* BusInfo struct.
* @dev_info_offset: Byte offset from beginning of this struct to the
* DevInfo array.
* @reserved: Natural alignment.
*/
struct visor_vbus_headerinfo {
u32 struct_bytes;
u32 device_info_struct_bytes;
u32 dev_info_count;
u32 chp_info_offset;
u32 bus_info_offset;
u32 dev_info_offset;
u8 reserved[104];
} __packed;
/*
* struct visor_vbus_channel
* @channel_header: Initialized by server.
* @hdr_info: Initialized by server.
* @chp_info: Describes client chipset device and driver.
* @bus_info: Describes client bus device and driver.
* @dev_info: Describes client device and driver for each device on the
* bus.
*/
struct visor_vbus_channel {
struct channel_header channel_header;
struct visor_vbus_headerinfo hdr_info;
struct visor_vbus_deviceinfo chp_info;
struct visor_vbus_deviceinfo bus_info;
struct visor_vbus_deviceinfo dev_info[0];
} __packed;
#endif
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