171 lines
3.5 KiB
C
171 lines
3.5 KiB
C
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/*
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*
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* Copyright (c) 2009, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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*
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*/
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#ifndef _VMBUS_PRIVATE_H_
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#define _VMBUS_PRIVATE_H_
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#ifndef INTERNAL
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#define INTERNAL static
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#endif
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#include "Hv.h"
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#include "VmbusApi.h"
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#include "Channel.h"
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#include "ChannelMgmt.h"
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#include "ChannelInterface.h"
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//#include "ChannelMessages.h"
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#include "RingBuffer.h"
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//#include "Packet.h"
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#include "List.h"
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//
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// Defines
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//
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// Maximum channels is determined by the size of the interrupt page which is PAGE_SIZE. 1/2 of PAGE_SIZE is for
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// send endpoint interrupt and the other is receive endpoint interrupt
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#define MAX_NUM_CHANNELS (PAGE_SIZE >> 1) << 3 // 16348 channels
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// The value here must be in multiple of 32
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// TODO: Need to make this configurable
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#define MAX_NUM_CHANNELS_SUPPORTED 256
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//
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// Data types
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//
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typedef enum {
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Disconnected,
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Connecting,
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Connected,
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Disconnecting
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} VMBUS_CONNECT_STATE;
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#define MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT
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typedef struct _VMBUS_CONNECTION {
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VMBUS_CONNECT_STATE ConnectState;
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UINT32 NextGpadlHandle;
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// Represents channel interrupts. Each bit position
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// represents a channel.
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// When a channel sends an interrupt via VMBUS, it
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// finds its bit in the sendInterruptPage, set it and
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// calls Hv to generate a port event. The other end
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// receives the port event and parse the recvInterruptPage
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// to see which bit is set
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VOID* InterruptPage;
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VOID* SendInterruptPage;
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VOID* RecvInterruptPage;
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// 2 pages - 1st page for parent->child notification and 2nd is child->parent notification
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VOID* MonitorPages;
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LIST_ENTRY ChannelMsgList;
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HANDLE ChannelMsgLock;
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// List of channels
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LIST_ENTRY ChannelList;
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HANDLE ChannelLock;
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HANDLE WorkQueue;
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} VMBUS_CONNECTION;
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typedef struct _VMBUS_MSGINFO {
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// Bookkeeping stuff
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LIST_ENTRY MsgListEntry;
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// Synchronize the request/response if needed
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HANDLE WaitEvent;
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// The message itself
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unsigned char Msg[0];
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} VMBUS_MSGINFO;
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//
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// Externs
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//
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extern VMBUS_CONNECTION gVmbusConnection;
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//
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// General vmbus interface
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//
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INTERNAL DEVICE_OBJECT*
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VmbusChildDeviceCreate(
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GUID deviceType,
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GUID deviceInstance,
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void *context);
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INTERNAL int
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VmbusChildDeviceAdd(
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DEVICE_OBJECT* Device);
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INTERNAL void
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VmbusChildDeviceRemove(
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DEVICE_OBJECT* Device);
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//INTERNAL void
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//VmbusChildDeviceDestroy(
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// DEVICE_OBJECT*);
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INTERNAL VMBUS_CHANNEL*
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GetChannelFromRelId(
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UINT32 relId
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);
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//
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// Connection interface
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//
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INTERNAL int
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VmbusConnect(
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VOID
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);
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INTERNAL int
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VmbusDisconnect(
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VOID
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);
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INTERNAL int
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VmbusPostMessage(
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PVOID buffer,
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SIZE_T bufSize
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);
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INTERNAL int
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VmbusSetEvent(
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UINT32 childRelId
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);
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INTERNAL VOID
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VmbusOnEvents(
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VOID
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);
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#endif // _VMBUS_PRIVATE_H_
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