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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 */
struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER {
u16 Type;
u16 DataOffset8;
u16 Length8;
u16 Flags;
u64 TransactionId;
u32 Reserved;
u32 RangeCount;
PAGE_BUFFER Range[MAX_PAGE_BUFFER_COUNT];
};
/* The format must be the same as VMDATA_GPA_DIRECT */
struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER {
u16 Type;
u16 DataOffset8;
u16 Length8;
u16 Flags;
u64 TransactionId;
u32 Reserved;
u32 RangeCount; /* Always 1 in this case */
MULTIPAGE_BUFFER Range;
};
#pragma pack(pop)
/* Routines */
static int
VmbusChannelOpen(
VMBUS_CHANNEL *Channel,
u32 SendRingBufferSize,
u32 RecvRingBufferSize,
void * UserData,
u32 UserDataLen,
PFN_CHANNEL_CALLBACK pfnOnChannelCallback,
void * Context
);
static void
VmbusChannelClose(
VMBUS_CHANNEL *Channel
);
static int
VmbusChannelSendPacket(
VMBUS_CHANNEL *Channel,
const void * Buffer,
u32 BufferLen,
u64 RequestId,
VMBUS_PACKET_TYPE Type,
u32 Flags
);
static int
VmbusChannelSendPacketPageBuffer(
VMBUS_CHANNEL *Channel,
PAGE_BUFFER PageBuffers[],
u32 PageCount,
void * Buffer,
u32 BufferLen,
u64 RequestId
);
static int
VmbusChannelSendPacketMultiPageBuffer(
VMBUS_CHANNEL *Channel,
MULTIPAGE_BUFFER *MultiPageBuffer,
void * Buffer,
u32 BufferLen,
u64 RequestId
);
static int
VmbusChannelEstablishGpadl(
VMBUS_CHANNEL *Channel,
void * Kbuffer, /* from kmalloc() */
u32 Size, /* page-size multiple */
u32 *GpadlHandle
);
static int
VmbusChannelTeardownGpadl(
VMBUS_CHANNEL *Channel,
u32 GpadlHandle
);
static int
VmbusChannelRecvPacket(
VMBUS_CHANNEL *Channel,
void * Buffer,
u32 BufferLen,
u32* BufferActualLen,
u64* RequestId
);
static int
VmbusChannelRecvPacketRaw(
VMBUS_CHANNEL *Channel,
void * Buffer,
u32 BufferLen,
u32* BufferActualLen,
u64* 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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