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/* Copyright (C) 2010 - 2015 UNISYS CORPORATION
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for more
* details.
*/
#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/ctype.h>
#include "channel.h"
/* {193b331b-c58f-11da-95a9-00e08161165f} */
#define SPAR_VBUS_CHANNEL_PROTOCOL_UUID \
UUID_LE(0x193b331b, 0xc58f, 0x11da, \
0x95, 0xa9, 0x0, 0xe0, 0x81, 0x61, 0x16, 0x5f)
static const uuid_le spar_vbus_channel_protocol_uuid =
SPAR_VBUS_CHANNEL_PROTOCOL_UUID;
#define SPAR_VBUS_CHANNEL_PROTOCOL_SIGNATURE ULTRA_CHANNEL_PROTOCOL_SIGNATURE
/* 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 SPAR_VBUS_CHANNEL_PROTOCOL_VERSIONID 1
#define SPAR_VBUS_CHANNEL_OK_CLIENT(ch) \
spar_check_channel_client(ch, \
spar_vbus_channel_protocol_uuid, \
"vbus", \
sizeof(struct spar_vbus_channel_protocol),\
SPAR_VBUS_CHANNEL_PROTOCOL_VERSIONID, \
SPAR_VBUS_CHANNEL_PROTOCOL_SIGNATURE)
#pragma pack(push, 1) /* both GCC and VC now allow this pragma */
/*
* An array of this struct is present in the channel area for each vbus.
* (See vbuschannel.h.)
* It is filled in by the client side to provide info about the device
* and driver from the client's perspective.
*/
struct ultra_vbus_deviceinfo {
u8 devtype[16]; /* short string identifying the device type */
u8 drvname[16]; /* driver .sys file name */
u8 infostrs[96]; /* kernel version */
u8 reserved[128]; /* pad size to 256 bytes */
};
/**
* vbuschannel_print_devinfo() - format a struct ultra_vbus_deviceinfo
* and write it to a seq_file
* @devinfo: the struct ultra_vbus_deviceinfo to format
* @seq: seq_file to write to
* @devix: the device index to be included in the output data, or -1 if no
* device index is to be included
*
* Reads @devInfo, and writes it in human-readable notation to @seq.
*/
static inline void
vbuschannel_print_devinfo(struct ultra_vbus_deviceinfo *devinfo,
struct seq_file *seq, int devix)
{
if (!isprint(devinfo->devtype[0]))
return; /* uninitialized vbus device entry */
if (devix >= 0)
seq_printf(seq, "[%d]", devix);
else
/* vbus device entry is for bus or chipset */
seq_puts(seq, " ");
/*
* Note: because the s-Par back-end is free to scribble in this area,
* we never assume '\0'-termination.
*/
seq_printf(seq, "%-*.*s ", (int)sizeof(devinfo->devtype),
(int)sizeof(devinfo->devtype), devinfo->devtype);
seq_printf(seq, "%-*.*s ", (int)sizeof(devinfo->drvname),
(int)sizeof(devinfo->drvname), devinfo->drvname);
seq_printf(seq, "%.*s\n", (int)sizeof(devinfo->infostrs),
devinfo->infostrs);
}
struct spar_vbus_headerinfo {
u32 struct_bytes; /* size of this struct in bytes */
u32 device_info_struct_bytes; /* sizeof(ULTRA_VBUS_DEVICEINFO) */
u32 dev_info_count; /* num of items in DevInfo member */
/* (this is the allocated size) */
u32 chp_info_offset; /* byte offset from beginning of this struct */
/* to the ChpInfo struct (below) */
u32 bus_info_offset; /* byte offset from beginning of this struct */
/* to the BusInfo struct (below) */
u32 dev_info_offset; /* byte offset from beginning of this struct */
/* to the DevInfo array (below) */
u8 reserved[104];
};
struct spar_vbus_channel_protocol {
struct channel_header channel_header; /* initialized by server */
struct spar_vbus_headerinfo hdr_info; /* initialized by server */
/* the remainder of this channel is filled in by the client */
struct ultra_vbus_deviceinfo chp_info;
/* describes client chipset device and driver */
struct ultra_vbus_deviceinfo bus_info;
/* describes client bus device and driver */
struct ultra_vbus_deviceinfo dev_info[0];
/* describes client device and driver for each device on the bus */
};
#pragma pack(pop)
#endif
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