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/*
*
* Copyright (c) 2009, Microsoft Corporation.
*
* 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 it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place - Suite 330, Boston, MA 02111-1307 USA.
*
* Authors:
* Haiyang Zhang <haiyangz@microsoft.com>
* Hank Janssen <hjanssen@microsoft.com>
*
*/
#ifndef _CHANNEL_H_
#define _CHANNEL_H_
#include "include/osd.h"
#include "ChannelMgmt.h"
#pragma pack(push,1)
// The format must be the same as VMDATA_GPA_DIRECT
typedef struct _VMBUS_CHANNEL_PACKET_PAGE_BUFFER {
UINT16 Type;
UINT16 DataOffset8;
UINT16 Length8;
UINT16 Flags;
UINT64 TransactionId;
UINT32 Reserved;
UINT32 RangeCount;
PAGE_BUFFER Range[MAX_PAGE_BUFFER_COUNT];
} VMBUS_CHANNEL_PACKET_PAGE_BUFFER;
// The format must be the same as VMDATA_GPA_DIRECT
typedef struct _VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER {
UINT16 Type;
UINT16 DataOffset8;
UINT16 Length8;
UINT16 Flags;
UINT64 TransactionId;
UINT32 Reserved;
UINT32 RangeCount; // Always 1 in this case
MULTIPAGE_BUFFER Range;
} VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER;
#pragma pack(pop)
//
// Routines
//
static int
VmbusChannelOpen(
VMBUS_CHANNEL *Channel,
UINT32 SendRingBufferSize,
UINT32 RecvRingBufferSize,
PVOID UserData,
UINT32 UserDataLen,
PFN_CHANNEL_CALLBACK pfnOnChannelCallback,
PVOID Context
);
static void
VmbusChannelClose(
VMBUS_CHANNEL *Channel
);
static int
VmbusChannelSendPacket(
VMBUS_CHANNEL *Channel,
const PVOID Buffer,
UINT32 BufferLen,
UINT64 RequestId,
VMBUS_PACKET_TYPE Type,
UINT32 Flags
);
static int
VmbusChannelSendPacketPageBuffer(
VMBUS_CHANNEL *Channel,
PAGE_BUFFER PageBuffers[],
UINT32 PageCount,
PVOID Buffer,
UINT32 BufferLen,
UINT64 RequestId
);
static int
VmbusChannelSendPacketMultiPageBuffer(
VMBUS_CHANNEL *Channel,
MULTIPAGE_BUFFER *MultiPageBuffer,
PVOID Buffer,
UINT32 BufferLen,
UINT64 RequestId
);
static int
VmbusChannelEstablishGpadl(
VMBUS_CHANNEL *Channel,
PVOID Kbuffer, // from kmalloc()
UINT32 Size, // page-size multiple
UINT32 *GpadlHandle
);
static int
VmbusChannelTeardownGpadl(
VMBUS_CHANNEL *Channel,
UINT32 GpadlHandle
);
static int
VmbusChannelRecvPacket(
VMBUS_CHANNEL *Channel,
PVOID Buffer,
UINT32 BufferLen,
UINT32* BufferActualLen,
UINT64* RequestId
);
static int
VmbusChannelRecvPacketRaw(
VMBUS_CHANNEL *Channel,
PVOID Buffer,
UINT32 BufferLen,
UINT32* BufferActualLen,
UINT64* RequestId
);
static void
VmbusChannelOnChannelEvent(
VMBUS_CHANNEL *Channel
);
static void
VmbusChannelGetDebugInfo(
VMBUS_CHANNEL *Channel,
VMBUS_CHANNEL_DEBUG_INFO *DebugInfo
);
static void
VmbusChannelOnTimer(
void *Context
);
#endif //_CHANNEL_H_
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