/*
*
* 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 "vmbus_api.h"
#include "channel.h"
#include "channel_mgmt.h"
#include "ring_buffer.h"
#include <linux/list.h>
/*
* 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
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;
atomic_t 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;
struct list_head ChannelMsgList;
spinlock_t channelmsg_lock;
/* List of channels */
struct list_head ChannelList;
spinlock_t channel_lock;
struct workqueue_struct *WorkQueue;
};
struct VMBUS_MSGINFO {
/* Bookkeeping stuff */
struct list_head MsgListEntry;
/* Synchronize the request/response if needed */
struct osd_waitevent *WaitEvent;
/* The message itself */
unsigned char Msg[0];
};
extern struct VMBUS_CONNECTION gVmbusConnection;
/* General vmbus interface */
struct hv_device *vmbus_child_device_create(struct hv_guid *deviceType,
struct hv_guid *deviceInstance,
struct vmbus_channel *channel);
int VmbusChildDeviceAdd(struct hv_device *Device);
int vmbus_child_device_register(struct hv_device *root_device_obj,
struct hv_device *child_device_obj);
void vmbus_child_device_unregister(struct hv_device *device_obj);
/* static void */
/* VmbusChildDeviceDestroy( */
/* struct hv_device *); */
struct vmbus_channel *GetChannelFromRelId(u32 relId);
/* Connection interface */
int VmbusConnect(void);
int VmbusDisconnect(void);
int VmbusPostMessage(void *buffer, size_t bufSize);
int VmbusSetEvent(u32 childRelId);
void VmbusOnEvents(void);
#endif /* _VMBUS_PRIVATE_H_ */
