174 lines
3.5 KiB
C
174 lines
3.5 KiB
C
/*
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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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#include "Hv.h"
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#include "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 "include/List.h"
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/* Defines */
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/*
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* Maximum channels is determined by the size of the interrupt page
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* which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt
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* and the other is receive endpoint interrupt
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*/
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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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/* Data types */
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enum VMBUS_CONNECT_STATE {
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Disconnected,
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Connecting,
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Connected,
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Disconnecting
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};
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#define MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT
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struct VMBUS_CONNECTION {
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enum VMBUS_CONNECT_STATE ConnectState;
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atomic_t NextGpadlHandle;
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/*
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* Represents channel interrupts. Each bit position represents
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* a channel. When a channel sends an interrupt via VMBUS, it
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* finds its bit in the sendInterruptPage, set it and calls Hv
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* to generate a port event. The other end receives the port
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* event and parse the recvInterruptPage to see which bit is
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* set
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*/
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void * InterruptPage;
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void * SendInterruptPage;
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void * RecvInterruptPage;
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/*
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* 2 pages - 1st page for parent->child notification and 2nd
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* is child->parent notification
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*/
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void * MonitorPages;
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LIST_ENTRY ChannelMsgList;
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spinlock_t channelmsg_lock;
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/* List of channels */
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LIST_ENTRY ChannelList;
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spinlock_t channel_lock;
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struct workqueue_struct *WorkQueue;
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};
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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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struct osd_waitevent *WaitEvent;
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/* The message itself */
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unsigned char Msg[0];
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};
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/* Externs */
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extern struct VMBUS_CONNECTION gVmbusConnection;
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/* General vmbus interface */
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static struct hv_device*
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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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static int
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VmbusChildDeviceAdd(
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struct hv_device *Device);
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static void
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VmbusChildDeviceRemove(
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struct hv_device *Device);
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/* static void */
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/* VmbusChildDeviceDestroy( */
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/* struct hv_device *); */
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static VMBUS_CHANNEL*
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GetChannelFromRelId(
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u32 relId
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);
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/* Connection interface */
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static int
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VmbusConnect(
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void
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);
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static int
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VmbusDisconnect(
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void
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);
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static int
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VmbusPostMessage(
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void * buffer,
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size_t bufSize
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);
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static int
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VmbusSetEvent(
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u32 childRelId
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);
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static 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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