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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 __VMBUSCHANNELINTERFACE_H
#define __VMBUSCHANNELINTERFACE_H
/*
* A revision number of vmbus that is used for ensuring both ends on a
* partition are using compatible versions.
*/
#define VMBUS_REVISION_NUMBER 13
/* Make maximum size of pipe payload of 16K */
#define MAX_PIPE_DATA_PAYLOAD (sizeof(u8) * 16384)
/* Define PipeMode values. */
#define VMBUS_PIPE_TYPE_BYTE 0x00000000
#define VMBUS_PIPE_TYPE_MESSAGE 0x00000004
/* The size of the user defined data buffer for non-pipe offers. */
#define MAX_USER_DEFINED_BYTES 120
/* The size of the user defined data buffer for pipe offers. */
#define MAX_PIPE_USER_DEFINED_BYTES 116
/*
* At the center of the Channel Management library is the Channel Offer. This
* struct contains the fundamental information about an offer.
*/
struct vmbus_channel_offer {
struct hv_guid if_type;
struct hv_guid if_instance;
u64 int_latency; /* in 100ns units */
u32 if_revision;
u32 server_ctx_size; /* in bytes */
u16 chn_flags;
u16 mmio_megabytes; /* in bytes * 1024 * 1024 */
union {
/* Non-pipes: The user has MAX_USER_DEFINED_BYTES bytes. */
struct {
unsigned char user_def[MAX_USER_DEFINED_BYTES];
} std;
/*
* Pipes:
* The following sructure is an integrated pipe protocol, which
* is implemented on top of standard user-defined data. Pipe
* clients have MAX_PIPE_USER_DEFINED_BYTES left for their own
* use.
*/
struct {
u32 pipe_mode;
unsigned char user_def[MAX_PIPE_USER_DEFINED_BYTES];
} pipe;
} u;
u32 padding;
} __packed;
/* Server Flags */
#define VMBUS_CHANNEL_ENUMERATE_DEVICE_INTERFACE 1
#define VMBUS_CHANNEL_SERVER_SUPPORTS_TRANSFER_PAGES 2
#define VMBUS_CHANNEL_SERVER_SUPPORTS_GPADLS 4
#define VMBUS_CHANNEL_NAMED_PIPE_MODE 0x10
#define VMBUS_CHANNEL_LOOPBACK_OFFER 0x100
#define VMBUS_CHANNEL_PARENT_OFFER 0x200
#define VMBUS_CHANNEL_REQUEST_MONITORED_NOTIFICATION 0x400
#endif
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