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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);
enum vmbus_channel_state {
CHANNEL_OFFER_STATE,
CHANNEL_OPENING_STATE,
CHANNEL_OPEN_STATE,
};
struct vmbus_channel {
LIST_ENTRY ListEntry;
struct hv_device *DeviceObject;
struct timer_list poll_timer; /* SA-111 workaround */
enum 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;
struct workqueue_struct *ControlWQ;
/* Channel callback are invoked in this workqueue context */
/* HANDLE dataWorkQueue; */
PFN_CHANNEL_CALLBACK OnChannelCallback;
void *ChannelCallbackContext;
};
struct vmbus_channel_debug_info {
u32 RelId;
enum 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;
};
/*
* Represents each channel msg on the vmbus connection This is a
* variable-size data structure depending on the msg type itself
*/
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 */
struct osd_waitevent *WaitEvent;
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;
} 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];
};
struct vmbus_channel *AllocVmbusChannel(void);
void FreeVmbusChannel(struct vmbus_channel *Channel);
void VmbusOnChannelMessage(void *Context);
int VmbusChannelRequestOffers(void);
void VmbusChannelReleaseUnattachedChannels(void);
#endif /* _CHANNEL_MGMT_H_ */
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