/*
*
* 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 _VMBUS_PRIVATE_H_
#define _VMBUS_PRIVATE_H_
#include "Hv.h"
#include "include/VmbusApi.h"
#include "Channel.h"
#include "ChannelMgmt.h"
#include "ChannelInterface.h"
/* #include "ChannelMessages.h" */
#include "RingBuffer.h"
/* #include "Packet.h" */
#include "include/List.h"
/* Defines */
/*
* Maximum channels is determined by the size of the interrupt page
* which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt
* and the other is receive endpoint interrupt
*/
#define MAX_NUM_CHANNELS (PAGE_SIZE >> 1) << 3 /* 16348 channels */
/* The value here must be in multiple of 32 */
/* TODO: Need to make this configurable */
#define MAX_NUM_CHANNELS_SUPPORTED 256
/* Data types */
enum VMBUS_CONNECT_STATE {
Disconnected,
Connecting,
Connected,
Disconnecting
};
#define MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT
struct VMBUS_CONNECTION {
enum VMBUS_CONNECT_STATE ConnectState;
u32 NextGpadlHandle;
/*
* Represents channel interrupts. Each bit position represents
* a channel. When a channel sends an interrupt via VMBUS, it
* finds its bit in the sendInterruptPage, set it and calls Hv
* to generate a port event. The other end receives the port
* event and parse the recvInterruptPage to see which bit is
* set
*/
void * InterruptPage;
void * SendInterruptPage;
void * RecvInterruptPage;
/*
* 2 pages - 1st page for parent->child notification and 2nd
* is child->parent notification
*/
void * MonitorPages;
LIST_ENTRY ChannelMsgList;
spinlock_t channelmsg_lock;
/* List of channels */
LIST_ENTRY ChannelList;
spinlock_t channel_lock;
HANDLE WorkQueue;
};
typedef struct _VMBUS_MSGINFO {
/* Bookkeeping stuff */
LIST_ENTRY MsgListEntry;
/* Synchronize the request/response if needed */
HANDLE WaitEvent;
/* The message itself */
unsigned char Msg[0];
} VMBUS_MSGINFO;
/* Externs */
extern struct VMBUS_CONNECTION gVmbusConnection;
/* General vmbus interface */
static DEVICE_OBJECT*
VmbusChildDeviceCreate(
GUID deviceType,
GUID deviceInstance,
void *context);
static int
VmbusChildDeviceAdd(
DEVICE_OBJECT* Device);
static void
VmbusChildDeviceRemove(
DEVICE_OBJECT* Device);
/* static void */
/* VmbusChildDeviceDestroy( */
/* DEVICE_OBJECT*); */
static VMBUS_CHANNEL*
GetChannelFromRelId(
u32 relId
);
/* Connection interface */
static int
VmbusConnect(
void
);
static int
VmbusDisconnect(
void
);
static int
VmbusPostMessage(
void * buffer,
size_t bufSize
);
static int
VmbusSetEvent(
u32 childRelId
);
static void
VmbusOnEvents(
void
);
#endif /* _VMBUS_PRIVATE_H_ */
