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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 _VMBUS_API_H_
#define _VMBUS_API_H_
#include <linux/device.h>
#include <linux/workqueue.h>
#define MAX_PAGE_BUFFER_COUNT 16
#define MAX_MULTIPAGE_BUFFER_COUNT 32 /* 128K */
#pragma pack(push, 1)
/* Single-page buffer */
struct hv_page_buffer {
u32 len;
u32 offset;
u64 pfn;
};
/* Multiple-page buffer */
struct hv_multipage_buffer {
/* Length and Offset determines the # of pfns in the array */
u32 len;
u32 offset;
u64 pfn_array[MAX_MULTIPAGE_BUFFER_COUNT];
};
/* 0x18 includes the proprietary packet header */
#define MAX_PAGE_BUFFER_PACKET (0x18 + \
(sizeof(struct hv_page_buffer) * \
MAX_PAGE_BUFFER_COUNT))
#define MAX_MULTIPAGE_BUFFER_PACKET (0x18 + \
sizeof(struct hv_multipage_buffer))
#pragma pack(pop)
struct hv_driver;
struct hv_device;
struct hv_dev_port_info {
u32 int_mask;
u32 read_idx;
u32 write_idx;
u32 bytes_avail_toread;
u32 bytes_avail_towrite;
};
struct hv_device_info {
u32 chn_id;
u32 chn_state;
struct hv_guid chn_type;
struct hv_guid chn_instance;
u32 monitor_id;
u32 server_monitor_pending;
u32 server_monitor_latency;
u32 server_monitor_conn_id;
u32 client_monitor_pending;
u32 client_monitor_latency;
u32 client_monitor_conn_id;
struct hv_dev_port_info inbound;
struct hv_dev_port_info outbound;
};
/* Base driver object */
struct hv_driver {
const char *name;
/* the device type supported by this driver */
struct hv_guid dev_type;
/*
* Device type specific drivers (net, blk etc.)
* need a mechanism to get a pointer to
* device type specific driver structure given
* a pointer to the base hyperv driver structure.
* The current code solves this problem using
* a hack. Support this need explicitly
*/
void *priv;
struct device_driver driver;
int (*dev_add)(struct hv_device *device, void *data);
int (*dev_rm)(struct hv_device *device);
void (*cleanup)(struct hv_driver *driver);
};
/* Base device object */
struct hv_device {
/* the driver for this device */
struct hv_driver *drv;
char name[64];
struct work_struct probe_failed_work_item;
int probe_error;
/* the device type id of this device */
struct hv_guid dev_type;
/* the device instance id of this device */
struct hv_guid dev_instance;
struct device device;
struct vmbus_channel *channel;
/* Device extension; */
void *ext;
};
#endif /* _VMBUS_API_H_ */
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