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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_MGMT_H_
#define _CHANNEL_MGMT_H_
#include "include/osd.h"
#include "include/List.h"
#include "RingBuffer.h"
#include "include/VmbusChannelInterface.h"
#include "include/ChannelMessages.h"
typedef void (*PFN_CHANNEL_CALLBACK)(void * context);
typedef enum {
CHANNEL_OFFER_STATE,
CHANNEL_OPENING_STATE,
CHANNEL_OPEN_STATE,
} VMBUS_CHANNEL_STATE;
typedef struct _VMBUS_CHANNEL {
LIST_ENTRY ListEntry;
DEVICE_OBJECT* DeviceObject;
HANDLE PollTimer; // SA-111 workaround
VMBUS_CHANNEL_STATE State;
VMBUS_CHANNEL_OFFER_CHANNEL OfferMsg;
// These are based on the OfferMsg.MonitorId. Save it here for easy access.
u8 MonitorGroup;
u8 MonitorBit;
u32 RingBufferGpadlHandle;
// Allocated memory for ring buffer
void * RingBufferPages;
u32 RingBufferPageCount;
RING_BUFFER_INFO Outbound; // send to parent
RING_BUFFER_INFO Inbound; // receive from parent
spinlock_t inbound_lock;
HANDLE ControlWQ;
// Channel callback are invoked in this workqueue context
//HANDLE dataWorkQueue;
PFN_CHANNEL_CALLBACK OnChannelCallback;
void * ChannelCallbackContext;
} VMBUS_CHANNEL;
typedef struct _VMBUS_CHANNEL_DEBUG_INFO {
u32 RelId;
VMBUS_CHANNEL_STATE State;
GUID InterfaceType;
GUID InterfaceInstance;
u32 MonitorId;
u32 ServerMonitorPending;
u32 ServerMonitorLatency;
u32 ServerMonitorConnectionId;
u32 ClientMonitorPending;
u32 ClientMonitorLatency;
u32 ClientMonitorConnectionId;
RING_BUFFER_DEBUG_INFO Inbound;
RING_BUFFER_DEBUG_INFO Outbound;
} VMBUS_CHANNEL_DEBUG_INFO;
typedef union {
VMBUS_CHANNEL_VERSION_SUPPORTED VersionSupported;
VMBUS_CHANNEL_OPEN_RESULT OpenResult;
VMBUS_CHANNEL_GPADL_TORNDOWN GpadlTorndown;
VMBUS_CHANNEL_GPADL_CREATED GpadlCreated;
VMBUS_CHANNEL_VERSION_RESPONSE VersionResponse;
} VMBUS_CHANNEL_MESSAGE_RESPONSE;
// Represents each channel msg on the vmbus connection
// This is a variable-size data structure depending on
// the msg type itself
typedef struct _VMBUS_CHANNEL_MSGINFO {
// Bookkeeping stuff
LIST_ENTRY MsgListEntry;
// So far, this is only used to handle gpadl body message
LIST_ENTRY SubMsgList;
// Synchronize the request/response if needed
HANDLE WaitEvent;
VMBUS_CHANNEL_MESSAGE_RESPONSE Response;
u32 MessageSize;
// The channel message that goes out on the "wire".
// It will contain at minimum the VMBUS_CHANNEL_MESSAGE_HEADER header
unsigned char Msg[0];
} VMBUS_CHANNEL_MSGINFO;
//
// Routines
//
static VMBUS_CHANNEL*
AllocVmbusChannel(
void
);
static void
FreeVmbusChannel(
VMBUS_CHANNEL *Channel
);
static void
VmbusOnChannelMessage(
void *Context
);
static int
VmbusChannelRequestOffers(
void
);
static void
VmbusChannelReleaseUnattachedChannels(
void
);
#endif //_CHANNEL_MGMT_H_
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