diff options
Diffstat (limited to 'drivers/staging/unisys/common-spar/include/channels/vbuschannel.h')
| -rw-r--r-- | drivers/staging/unisys/common-spar/include/channels/vbuschannel.h | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/drivers/staging/unisys/common-spar/include/channels/vbuschannel.h b/drivers/staging/unisys/common-spar/include/channels/vbuschannel.h new file mode 100644 index 000000000000..99dbbcf3d11e --- /dev/null +++ b/drivers/staging/unisys/common-spar/include/channels/vbuschannel.h @@ -0,0 +1,135 @@ +/* Copyright © 2010 - 2013 UNISYS CORPORATION + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * 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 "commontypes.h" +#include "vbusdeviceinfo.h" +#include "channel.h" + +/* {193b331b-c58f-11da-95a9-00e08161165f} */ +#define ULTRA_VBUS_CHANNEL_PROTOCOL_GUID \ + {0x193b331b, 0xc58f, 0x11da, \ + {0x95, 0xa9, 0x0, 0xe0, 0x81, 0x61, 0x16, 0x5f} } +static const GUID UltraVbusChannelProtocolGuid = + ULTRA_VBUS_CHANNEL_PROTOCOL_GUID; + +#define ULTRA_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 ULTRA_VBUS_CHANNEL_PROTOCOL_VERSIONID 1 + +#define ULTRA_VBUS_CHANNEL_OK_CLIENT(pChannel, logCtx) \ + (ULTRA_check_channel_client(pChannel, \ + UltraVbusChannelProtocolGuid, \ + "vbus", \ + sizeof(ULTRA_VBUS_CHANNEL_PROTOCOL), \ + ULTRA_VBUS_CHANNEL_PROTOCOL_VERSIONID, \ + ULTRA_VBUS_CHANNEL_PROTOCOL_SIGNATURE, \ + __FILE__, __LINE__, logCtx)) + +#define ULTRA_VBUS_CHANNEL_OK_SERVER(actualBytes, logCtx) \ + (ULTRA_check_channel_server(UltraVbusChannelProtocolGuid, \ + "vbus", \ + sizeof(ULTRA_VBUS_CHANNEL_PROTOCOL), \ + actualBytes, \ + __FILE__, __LINE__, logCtx)) + + +#pragma pack(push, 1) /* both GCC and VC now allow this pragma */ +typedef struct _ULTRA_VBUS_HEADERINFO { + U32 structBytes; /* size of this struct in bytes */ + U32 deviceInfoStructBytes; /* sizeof(ULTRA_VBUS_DEVICEINFO) */ + U32 devInfoCount; /* num of items in DevInfo member */ + /* (this is the allocated size) */ + U32 chpInfoByteOffset; /* byte offset from beginning of this struct */ + /* to the the ChpInfo struct (below) */ + U32 busInfoByteOffset; /* byte offset from beginning of this struct */ + /* to the the BusInfo struct (below) */ + U32 devInfoByteOffset; /* byte offset from beginning of this struct */ + /* to the the DevInfo array (below) */ + U8 reserved[104]; +} ULTRA_VBUS_HEADERINFO; + +typedef struct _ULTRA_VBUS_CHANNEL_PROTOCOL { + ULTRA_CHANNEL_PROTOCOL ChannelHeader; /* initialized by server */ + ULTRA_VBUS_HEADERINFO HdrInfo; /* initialized by server */ + /* the remainder of this channel is filled in by the client */ + ULTRA_VBUS_DEVICEINFO ChpInfo; /* describes client chipset device and + * driver */ + ULTRA_VBUS_DEVICEINFO BusInfo; /* describes client bus device and + * driver */ + ULTRA_VBUS_DEVICEINFO DevInfo[0]; /* describes client device and + * driver for */ + /* each device on the bus */ +} ULTRA_VBUS_CHANNEL_PROTOCOL; + +#define VBUS_CH_SIZE_EXACT(MAXDEVICES) \ + (sizeof(ULTRA_VBUS_CHANNEL_PROTOCOL) + ((MAXDEVICES) * \ + sizeof(ULTRA_VBUS_DEVICEINFO))) +#define VBUS_CH_SIZE(MAXDEVICES) COVER(VBUS_CH_SIZE_EXACT(MAXDEVICES), 4096) + +static INLINE void +ULTRA_VBUS_init_channel(ULTRA_VBUS_CHANNEL_PROTOCOL __iomem *x, + int bytesAllocated) +{ + /* Please note that the memory at <x> does NOT necessarily have space + * for DevInfo structs allocated at the end, which is why we do NOT use + * <bytesAllocated> to clear. */ + memset_io(x, 0, sizeof(ULTRA_VBUS_CHANNEL_PROTOCOL)); + if (bytesAllocated < (int) sizeof(ULTRA_VBUS_CHANNEL_PROTOCOL)) + return; + writel(ULTRA_VBUS_CHANNEL_PROTOCOL_VERSIONID, + &x->ChannelHeader.VersionId); + writeq(ULTRA_VBUS_CHANNEL_PROTOCOL_SIGNATURE, + &x->ChannelHeader.Signature); + writel(CHANNELSRV_READY, &x->ChannelHeader.SrvState); + writel(sizeof(x->ChannelHeader), &x->ChannelHeader.HeaderSize); + writeq(bytesAllocated, &x->ChannelHeader.Size); + memcpy_toio(&x->ChannelHeader.Type, &UltraVbusChannelProtocolGuid, + sizeof(x->ChannelHeader.Type)); + memcpy_toio(&x->ChannelHeader.ZoneGuid, &Guid0, + sizeof(x->ChannelHeader.ZoneGuid)); + writel(sizeof(ULTRA_VBUS_HEADERINFO), &x->HdrInfo.structBytes); + writel(sizeof(ULTRA_VBUS_HEADERINFO), &x->HdrInfo.chpInfoByteOffset); + writel(readl(&x->HdrInfo.chpInfoByteOffset) + + sizeof(ULTRA_VBUS_DEVICEINFO), + &x->HdrInfo.busInfoByteOffset); + writel(readl(&x->HdrInfo.busInfoByteOffset) + + sizeof(ULTRA_VBUS_DEVICEINFO), + &x->HdrInfo.devInfoByteOffset); + writel(sizeof(ULTRA_VBUS_DEVICEINFO), + &x->HdrInfo.deviceInfoStructBytes); + bytesAllocated -= (sizeof(ULTRA_CHANNEL_PROTOCOL) + + readl(&x->HdrInfo.devInfoByteOffset)); + writel(bytesAllocated / readl(&x->HdrInfo.deviceInfoStructBytes), + &x->HdrInfo.devInfoCount); +} + +#pragma pack(pop) + +#endif |