/*
*
* Copyright (c) 2011, 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>
* K. Y. Srinivasan <kys@microsoft.com>
*
*/
#ifndef _HYPERV_H
#define _HYPERV_H
struct hv_guid {
unsigned char data[16];
};
#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_ring_buffer {
/* Offset in bytes from the start of ring data below */
u32 write_index;
/* Offset in bytes from the start of ring data below */
u32 read_index;
u32 interrupt_mask;
/* Pad it to PAGE_SIZE so that data starts on page boundary */
u8 reserved[4084];
/* NOTE:
* The interrupt_mask field is used only for channels but since our
* vmbus connection also uses this data structure and its data starts
* here, we commented out this field.
*/
/*
* Ring data starts here + RingDataStartOffset
* !!! DO NOT place any fields below this !!!
*/
u8 buffer[0];
} __packed;
struct hv_ring_buffer_info {
struct hv_ring_buffer *ring_buffer;
u32 ring_size; /* Include the shared header */
spinlock_t ring_lock;
u32 ring_datasize; /* < ring_size */
u32 ring_data_startoffset;
};
struct hv_ring_buffer_debug_info {
u32 current_interrupt_mask;
u32 current_read_index;
u32 current_write_index;
u32 bytes_avail_toread;
u32 bytes_avail_towrite;
};
/*
* We use the same version numbering for all Hyper-V modules.
*
* Definition of versioning is as follows;
*
* Major Number Changes for these scenarios;
* 1. When a new version of Windows Hyper-V
* is released.
* 2. A Major change has occurred in the
* Linux IC's.
* (For example the merge for the first time
* into the kernel) Every time the Major Number
* changes, the Revision number is reset to 0.
* Minor Number Changes when new functionality is added
* to the Linux IC's that is not a bug fix.
*
* 3.1 - Added completed hv_utils driver. Shutdown/Heartbeat/Timesync
*/
#define HV_DRV_VERSION "3.1"
/*
* 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
struct vmpacket_descriptor {
u16 type;
u16 offset8;
u16 len8;
u16 flags;
u64 trans_id;
} __packed;
struct vmpacket_header {
u32 prev_pkt_start_offset;
struct vmpacket_descriptor descriptor;
} __packed;
struct vmtransfer_page_range {
u32 byte_count;
u32 byte_offset;
} __packed;
struct vmtransfer_page_packet_header {
struct vmpacket_descriptor d;
u16 xfer_pageset_id;
bool sender_owns_set;
u8 reserved;
u32 range_cnt;
struct vmtransfer_page_range ranges[1];
} __packed;
struct vmgpadl_packet_header {
struct vmpacket_descriptor d;
u32 gpadl;
u32 reserved;
} __packed;
struct vmadd_remove_transfer_page_set {
struct vmpacket_descriptor d;
u32 gpadl;
u16 xfer_pageset_id;
u16 reserved;
} __packed;
/*
* This structure defines a range in guest physical space that can be made to
* look virtually contiguous.
*/
struct gpa_range {
u32 byte_count;
u32 byte_offset;
u64 pfn_array[0];
};
/*
* This is the format for an Establish Gpadl packet, which contains a handle by
* which this GPADL will be known and a set of GPA ranges associated with it.
* This can be converted to a MDL by the guest OS. If there are multiple GPA
* ranges, then the resulting MDL will be "chained," representing multiple VA
* ranges.
*/
struct vmestablish_gpadl {
struct vmpacket_descriptor d;
u32 gpadl;
u32 range_cnt;
struct gpa_range range[1];
} __packed;
/*
* This is the format for a Teardown Gpadl packet, which indicates that the
* GPADL handle in the Establish Gpadl packet will never be referenced again.
*/
struct vmteardown_gpadl {
struct vmpacket_descriptor d;
u32 gpadl;
u32 reserved; /* for alignment to a 8-byte boundary */
} __packed;
/*
* This is the format for a GPA-Direct packet, which contains a set of GPA
* ranges, in addition to commands and/or data.
*/
struct vmdata_gpa_direct {
struct vmpacket_descriptor d;
u32 reserved;
u32 range_cnt;
struct gpa_range range[1];
} __packed;
/* This is the format for a Additional Data Packet. */
struct vmadditional_data {
struct vmpacket_descriptor d;
u64 total_bytes;
u32 offset;
u32 byte_cnt;
unsigned char data[1];
} __packed;
union vmpacket_largest_possible_header {
struct vmpacket_descriptor simple_hdr;
struct vmtransfer_page_packet_header xfer_page_hdr;
struct vmgpadl_packet_header gpadl_hdr;
struct vmadd_remove_transfer_page_set add_rm_xfer_page_hdr;
struct vmestablish_gpadl establish_gpadl_hdr;
struct vmteardown_gpadl teardown_gpadl_hdr;
struct vmdata_gpa_direct data_gpa_direct_hdr;
};
#define VMPACKET_DATA_START_ADDRESS(__packet) \
(void *)(((unsigned char *)__packet) + \
((struct vmpacket_descriptor)__packet)->offset8 * 8)
#define VMPACKET_DATA_LENGTH(__packet) \
((((struct vmpacket_descriptor)__packet)->len8 - \
((struct vmpacket_descriptor)__packet)->offset8) * 8)
#define VMPACKET_TRANSFER_MODE(__packet) \
(((struct IMPACT)__packet)->type)
enum vmbus_packet_type {
VM_PKT_INVALID = 0x0,
VM_PKT_SYNCH = 0x1,
VM_PKT_ADD_XFER_PAGESET = 0x2,
VM_PKT_RM_XFER_PAGESET = 0x3,
VM_PKT_ESTABLISH_GPADL = 0x4,
VM_PKT_TEARDOWN_GPADL = 0x5,
VM_PKT_DATA_INBAND = 0x6,
VM_PKT_DATA_USING_XFER_PAGES = 0x7,
VM_PKT_DATA_USING_GPADL = 0x8,
VM_PKT_DATA_USING_GPA_DIRECT = 0x9,
VM_PKT_CANCEL_REQUEST = 0xa,
VM_PKT_COMP = 0xb,
VM_PKT_DATA_USING_ADDITIONAL_PKT = 0xc,
VM_PKT_ADDITIONAL_DATA = 0xd
};
#define VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED 1
#endif /* _HYPERV_H */
