diff options
Diffstat (limited to 'drivers/visorbus/vbuschannel.h')
| -rw-r--r-- | drivers/visorbus/vbuschannel.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/drivers/visorbus/vbuschannel.h b/drivers/visorbus/vbuschannel.h new file mode 100644 index 000000000000..b1dce26166bf --- /dev/null +++ b/drivers/visorbus/vbuschannel.h @@ -0,0 +1,95 @@ +// 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 |