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60169cb210
freebsd-dev/sys/dev/hyperv/include/hyperv.h
Sepherosa Ziehau 60169cb210 hyperv/vmbus: Embed channel detach task in channel itself. 
GC work queue stuffs.

MFC after:	1 week
Sponsored by:	Microsoft OSTC
Differential Revision:	https://reviews.freebsd.org/D6864
2016-07-11 08:12:04 +00:00

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/*-
* Copyright (c) 2009-2012,2016 Microsoft Corp.
* Copyright (c) 2012 NetApp Inc.
* Copyright (c) 2012 Citrix Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
/**
* HyperV definitions for messages that are sent between instances of the
* Channel Management Library in separate partitions, or in some cases,
* back to itself.
*/
#ifndef __HYPERV_H__
#define __HYPERV_H__
#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/queue.h>
#include <sys/malloc.h>
#include <sys/kthread.h>
#include <sys/taskqueue.h>
#include <sys/systm.h>
#include <sys/lock.h>
#include <sys/sema.h>
#include <sys/smp.h>
#include <sys/mutex.h>
#include <sys/bus.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <amd64/include/xen/synch_bitops.h>
#include <amd64/include/atomic.h>
typedef uint8_t hv_bool_uint8_t;
#define HV_S_OK 0x00000000
#define HV_E_FAIL 0x80004005
#define HV_ERROR_NOT_SUPPORTED 0x80070032
#define HV_ERROR_MACHINE_LOCKED 0x800704F7
/*
* VMBUS version is 32 bit, upper 16 bit for major_number and lower
* 16 bit for minor_number.
*
* 0.13 -- Windows Server 2008
* 1.1 -- Windows 7
* 2.4 -- Windows 8
* 3.0 -- Windows 8.1
*/
#define HV_VMBUS_VERSION_WS2008 ((0 << 16) | (13))
#define HV_VMBUS_VERSION_WIN7 ((1 << 16) | (1))
#define HV_VMBUS_VERSION_WIN8 ((2 << 16) | (4))
#define HV_VMBUS_VERSION_WIN8_1 ((3 << 16) | (0))
/*
* Make maximum size of pipe payload of 16K
*/
#define HV_MAX_PIPE_DATA_PAYLOAD (sizeof(BYTE) * 16384)
/*
* Define pipe_mode values
*/
#define HV_VMBUS_PIPE_TYPE_BYTE 0x00000000
#define HV_VMBUS_PIPE_TYPE_MESSAGE 0x00000004
/*
* The size of the user defined data buffer for non-pipe offers
*/
#define HV_MAX_USER_DEFINED_BYTES 120
/*
* The size of the user defined data buffer for pipe offers
*/
#define HV_MAX_PIPE_USER_DEFINED_BYTES 116
#define HV_MAX_PAGE_BUFFER_COUNT 32
#define HV_MAX_MULTIPAGE_BUFFER_COUNT 32
#define HV_ALIGN_UP(value, align) \
(((value) & (align-1)) ? \
(((value) + (align-1)) & ~(align-1) ) : (value))
#define HV_ALIGN_DOWN(value, align) ( (value) & ~(align-1) )
#define HV_NUM_PAGES_SPANNED(addr, len) \
((HV_ALIGN_UP(addr+len, PAGE_SIZE) - \
HV_ALIGN_DOWN(addr, PAGE_SIZE)) >> PAGE_SHIFT )
typedef struct hv_guid {
uint8_t data[16];
} __packed hv_guid;
#define HYPERV_GUID_STRLEN 40
int hyperv_guid2str(const struct hv_guid *, char *, size_t);
#define HV_NIC_GUID \
.data = {0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, \
0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E}
#define HV_IDE_GUID \
.data = {0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, \
0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5}
#define HV_SCSI_GUID \
.data = {0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, \
0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f}
/*
* At the center of the Channel Management library is
* the Channel Offer. This struct contains the
* fundamental information about an offer.
*/
typedef struct hv_vmbus_channel_offer {
hv_guid interface_type;
hv_guid interface_instance;
uint64_t interrupt_latency_in_100ns_units;
uint32_t interface_revision;
uint32_t server_context_area_size; /* in bytes */
uint16_t channel_flags;
uint16_t mmio_megabytes; /* in bytes * 1024 * 1024 */
union
{
/*
* Non-pipes: The user has HV_MAX_USER_DEFINED_BYTES bytes.
*/
struct {
uint8_t user_defined[HV_MAX_USER_DEFINED_BYTES];
} __packed standard;
/*
* Pipes: The following structure is an integrated pipe protocol, which
* is implemented on top of standard user-defined data. pipe
* clients have HV_MAX_PIPE_USER_DEFINED_BYTES left for their
* own use.
*/
struct {
uint32_t pipe_mode;
uint8_t user_defined[HV_MAX_PIPE_USER_DEFINED_BYTES];
} __packed pipe;
} u;
/*
* Sub_channel_index, newly added in Win8.
*/
uint16_t sub_channel_index;
uint16_t padding;
} __packed hv_vmbus_channel_offer;
typedef uint32_t hv_gpadl_handle;
typedef struct {
uint16_t type;
uint16_t data_offset8;
uint16_t length8;
uint16_t flags;
uint64_t transaction_id;
} __packed hv_vm_packet_descriptor;
typedef uint32_t hv_previous_packet_offset;
typedef struct {
hv_previous_packet_offset previous_packet_start_offset;
hv_vm_packet_descriptor descriptor;
} __packed hv_vm_packet_header;
typedef struct {
uint32_t byte_count;
uint32_t byte_offset;
} __packed hv_vm_transfer_page;
typedef struct {
hv_vm_packet_descriptor d;
uint16_t transfer_page_set_id;
hv_bool_uint8_t sender_owns_set;
uint8_t reserved;
uint32_t range_count;
hv_vm_transfer_page ranges[1];
} __packed hv_vm_transfer_page_packet_header;
typedef struct {
hv_vm_packet_descriptor d;
uint32_t gpadl;
uint32_t reserved;
} __packed hv_vm_gpadl_packet_header;
typedef struct {
hv_vm_packet_descriptor d;
uint32_t gpadl;
uint16_t transfer_page_set_id;
uint16_t reserved;
} __packed hv_vm_add_remove_transfer_page_set;
/*
* This structure defines a range in guest
* physical space that can be made
* to look virtually contiguous.
*/
typedef struct {
uint32_t byte_count;
uint32_t byte_offset;
uint64_t pfn_array[0];
} __packed hv_gpa_range;
/*
* 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.
*/
typedef struct {
hv_vm_packet_descriptor d;
uint32_t gpadl;
uint32_t range_count;
hv_gpa_range range[1];
} __packed hv_vm_establish_gpadl;
/*
* 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.
*/
typedef struct {
hv_vm_packet_descriptor d;
uint32_t gpadl;
/* for alignment to a 8-byte boundary */
uint32_t reserved;
} __packed hv_vm_teardown_gpadl;
/*
* This is the format for a GPA-Direct packet, which contains a set of GPA
* ranges, in addition to commands and/or data.
*/
typedef struct {
hv_vm_packet_descriptor d;
uint32_t reserved;
uint32_t range_count;
hv_gpa_range range[1];
} __packed hv_vm_data_gpa_direct;
/*
* This is the format for a Additional data Packet.
*/
typedef struct {
hv_vm_packet_descriptor d;
uint64_t total_bytes;
uint32_t byte_offset;
uint32_t byte_count;
uint8_t data[1];
} __packed hv_vm_additional_data;
typedef union {
hv_vm_packet_descriptor simple_header;
hv_vm_transfer_page_packet_header transfer_page_header;
hv_vm_gpadl_packet_header gpadl_header;
hv_vm_add_remove_transfer_page_set add_remove_transfer_page_header;
hv_vm_establish_gpadl establish_gpadl_header;
hv_vm_teardown_gpadl teardown_gpadl_header;
hv_vm_data_gpa_direct data_gpa_direct_header;
} __packed hv_vm_packet_largest_possible_header;
typedef enum {
HV_VMBUS_PACKET_TYPE_INVALID = 0x0,
HV_VMBUS_PACKET_TYPES_SYNCH = 0x1,
HV_VMBUS_PACKET_TYPE_ADD_TRANSFER_PAGE_SET = 0x2,
HV_VMBUS_PACKET_TYPE_REMOVE_TRANSFER_PAGE_SET = 0x3,
HV_VMBUS_PACKET_TYPE_ESTABLISH_GPADL = 0x4,
HV_VMBUS_PACKET_TYPE_TEAR_DOWN_GPADL = 0x5,
HV_VMBUS_PACKET_TYPE_DATA_IN_BAND = 0x6,
HV_VMBUS_PACKET_TYPE_DATA_USING_TRANSFER_PAGES = 0x7,
HV_VMBUS_PACKET_TYPE_DATA_USING_GPADL = 0x8,
HV_VMBUS_PACKET_TYPE_DATA_USING_GPA_DIRECT = 0x9,
HV_VMBUS_PACKET_TYPE_CANCEL_REQUEST = 0xa,
HV_VMBUS_PACKET_TYPE_COMPLETION = 0xb,
HV_VMBUS_PACKET_TYPE_DATA_USING_ADDITIONAL_PACKETS = 0xc,
HV_VMBUS_PACKET_TYPE_ADDITIONAL_DATA = 0xd
} hv_vmbus_packet_type;
#define HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED 1
/*
* Version 1 messages
*/
typedef enum {
HV_CHANNEL_MESSAGE_INVALID = 0,
HV_CHANNEL_MESSAGE_OFFER_CHANNEL = 1,
HV_CHANNEL_MESSAGE_RESCIND_CHANNEL_OFFER = 2,
HV_CHANNEL_MESSAGE_REQUEST_OFFERS = 3,
HV_CHANNEL_MESSAGE_ALL_OFFERS_DELIVERED = 4,
HV_CHANNEL_MESSAGE_OPEN_CHANNEL = 5,
HV_CHANNEL_MESSAGE_OPEN_CHANNEL_RESULT = 6,
HV_CHANNEL_MESSAGE_CLOSE_CHANNEL = 7,
HV_CHANNEL_MESSAGEL_GPADL_HEADER = 8,
HV_CHANNEL_MESSAGE_GPADL_BODY = 9,
HV_CHANNEL_MESSAGE_GPADL_CREATED = 10,
HV_CHANNEL_MESSAGE_GPADL_TEARDOWN = 11,
HV_CHANNEL_MESSAGE_GPADL_TORNDOWN = 12,
HV_CHANNEL_MESSAGE_REL_ID_RELEASED = 13,
HV_CHANNEL_MESSAGE_INITIATED_CONTACT = 14,
HV_CHANNEL_MESSAGE_VERSION_RESPONSE = 15,
HV_CHANNEL_MESSAGE_UNLOAD = 16,
HV_CHANNEL_MESSAGE_COUNT
} hv_vmbus_channel_msg_type;
typedef struct {
hv_vmbus_channel_msg_type message_type;
uint32_t padding;
} __packed hv_vmbus_channel_msg_header;
/*
* Query VMBus Version parameters
*/
typedef struct {
hv_vmbus_channel_msg_header header;
uint32_t version;
} __packed hv_vmbus_channel_query_vmbus_version;
/*
* VMBus Version Supported parameters
*/
typedef struct {
hv_vmbus_channel_msg_header header;
hv_bool_uint8_t version_supported;
} __packed hv_vmbus_channel_version_supported;
/*
* Channel Offer parameters
*/
typedef struct {
hv_vmbus_channel_msg_header header;
hv_vmbus_channel_offer offer;
uint32_t child_rel_id;
uint8_t monitor_id;
/*
* This field has been split into a bit field on Win7
* and higher.
*/
uint8_t monitor_allocated:1;
uint8_t reserved:7;
/*
* Following fields were added in win7 and higher.
* Make sure to check the version before accessing these fields.
*
* If "is_dedicated_interrupt" is set, we must not set the
* associated bit in the channel bitmap while sending the
* interrupt to the host.
*
* connection_id is used in signaling the host.
*/
uint16_t is_dedicated_interrupt:1;
uint16_t reserved1:15;
uint32_t connection_id;
} __packed hv_vmbus_channel_offer_channel;
/*
* Rescind Offer parameters
*/
typedef struct
{
hv_vmbus_channel_msg_header header;
uint32_t child_rel_id;
} __packed hv_vmbus_channel_rescind_offer;
/*
* Request Offer -- no parameters, SynIC message contains the partition ID
*
* Set Snoop -- no parameters, SynIC message contains the partition ID
*
* Clear Snoop -- no parameters, SynIC message contains the partition ID
*
* All Offers Delivered -- no parameters, SynIC message contains the
* partition ID
*
* Flush Client -- no parameters, SynIC message contains the partition ID
*/
/*
* Open Channel parameters
*/
typedef struct
{
hv_vmbus_channel_msg_header header;
/*
* Identifies the specific VMBus channel that is being opened.
*/
uint32_t child_rel_id;
/*
* ID making a particular open request at a channel offer unique.
*/
uint32_t open_id;
/*
* GPADL for the channel's ring buffer.
*/
hv_gpadl_handle ring_buffer_gpadl_handle;
/*
* Before win8, all incoming channel interrupts are only
* delivered on cpu 0. Setting this value to 0 would
* preserve the earlier behavior.
*/
uint32_t target_vcpu;
/*
* The upstream ring buffer begins at offset zero in the memory described
* by ring_buffer_gpadl_handle. The downstream ring buffer follows it at
* this offset (in pages).
*/
uint32_t downstream_ring_buffer_page_offset;
/*
* User-specific data to be passed along to the server endpoint.
*/
uint8_t user_data[HV_MAX_USER_DEFINED_BYTES];
} __packed hv_vmbus_channel_open_channel;
typedef uint32_t hv_nt_status;
/*
* Open Channel Result parameters
*/
typedef struct
{
hv_vmbus_channel_msg_header header;
uint32_t child_rel_id;
uint32_t open_id;
hv_nt_status status;
} __packed hv_vmbus_channel_open_result;
/*
* Close channel parameters
*/
typedef struct
{
hv_vmbus_channel_msg_header header;
uint32_t child_rel_id;
} __packed hv_vmbus_channel_close_channel;
/*
* Channel Message GPADL
*/
#define HV_GPADL_TYPE_RING_BUFFER 1
#define HV_GPADL_TYPE_SERVER_SAVE_AREA 2
#define HV_GPADL_TYPE_TRANSACTION 8
/*
* The number of PFNs in a GPADL message is defined by the number of pages
* that would be spanned by byte_count and byte_offset. If the implied number
* of PFNs won't fit in this packet, there will be a follow-up packet that
* contains more
*/
typedef struct {
hv_vmbus_channel_msg_header header;
uint32_t child_rel_id;
uint32_t gpadl;
uint16_t range_buf_len;
uint16_t range_count;
hv_gpa_range range[0];
} __packed hv_vmbus_channel_gpadl_header;
/*
* This is the follow-up packet that contains more PFNs
*/
typedef struct {
hv_vmbus_channel_msg_header header;
uint32_t message_number;
uint32_t gpadl;
uint64_t pfn[0];
} __packed hv_vmbus_channel_gpadl_body;
typedef struct {
hv_vmbus_channel_msg_header header;
uint32_t child_rel_id;
uint32_t gpadl;
uint32_t creation_status;
} __packed hv_vmbus_channel_gpadl_created;
typedef struct {
hv_vmbus_channel_msg_header header;
uint32_t child_rel_id;
uint32_t gpadl;
} __packed hv_vmbus_channel_gpadl_teardown;
typedef struct {
hv_vmbus_channel_msg_header header;
uint32_t gpadl;
} __packed hv_vmbus_channel_gpadl_torndown;
typedef struct {
hv_vmbus_channel_msg_header header;
uint32_t child_rel_id;
} __packed hv_vmbus_channel_relid_released;
typedef hv_vmbus_channel_msg_header hv_vmbus_channel_unload;
#define HW_MACADDR_LEN 6
/*
* Fixme: Added to quiet "typeof" errors involving hv_vmbus.h when
* the including C file was compiled with "-std=c99".
*/
#ifndef typeof
#define typeof __typeof
#endif
#ifndef NULL
#define NULL (void *)0
#endif
typedef void *hv_vmbus_handle;
#ifndef CONTAINING_RECORD
#define CONTAINING_RECORD(address, type, field) ((type *)( \
(uint8_t *)(address) - \
(uint8_t *)(&((type *)0)->field)))
#endif /* CONTAINING_RECORD */
#define container_of(ptr, type, member) ({ \
__typeof__( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
enum {
HV_VMBUS_IVAR_TYPE,
HV_VMBUS_IVAR_INSTANCE,
HV_VMBUS_IVAR_NODE,
HV_VMBUS_IVAR_DEVCTX
};
#define HV_VMBUS_ACCESSOR(var, ivar, type) \
__BUS_ACCESSOR(vmbus, var, HV_VMBUS, ivar, type)
HV_VMBUS_ACCESSOR(type, TYPE, const char *)
HV_VMBUS_ACCESSOR(devctx, DEVCTX, struct hv_device *)
/*
* Common defines for Hyper-V ICs
*/
#define HV_ICMSGTYPE_NEGOTIATE 0
#define HV_ICMSGTYPE_HEARTBEAT 1
#define HV_ICMSGTYPE_KVPEXCHANGE 2
#define HV_ICMSGTYPE_SHUTDOWN 3
#define HV_ICMSGTYPE_TIMESYNC 4
#define HV_ICMSGTYPE_VSS 5
#define HV_ICMSGHDRFLAG_TRANSACTION 1
#define HV_ICMSGHDRFLAG_REQUEST 2
#define HV_ICMSGHDRFLAG_RESPONSE 4
typedef struct hv_vmbus_pipe_hdr {
uint32_t flags;
uint32_t msgsize;
} __packed hv_vmbus_pipe_hdr;
typedef struct hv_vmbus_ic_version {
uint16_t major;
uint16_t minor;
} __packed hv_vmbus_ic_version;
typedef struct hv_vmbus_icmsg_hdr {
hv_vmbus_ic_version icverframe;
uint16_t icmsgtype;
hv_vmbus_ic_version icvermsg;
uint16_t icmsgsize;
uint32_t status;
uint8_t ictransaction_id;
uint8_t icflags;
uint8_t reserved[2];
} __packed hv_vmbus_icmsg_hdr;
typedef struct hv_vmbus_icmsg_negotiate {
uint16_t icframe_vercnt;
uint16_t icmsg_vercnt;
uint32_t reserved;
hv_vmbus_ic_version icversion_data[1]; /* any size array */
} __packed hv_vmbus_icmsg_negotiate;
typedef struct hv_vmbus_shutdown_msg_data {
uint32_t reason_code;
uint32_t timeout_seconds;
uint32_t flags;
uint8_t display_message[2048];
} __packed hv_vmbus_shutdown_msg_data;
typedef struct hv_vmbus_heartbeat_msg_data {
uint64_t seq_num;
uint32_t reserved[8];
} __packed hv_vmbus_heartbeat_msg_data;
typedef struct {
/*
* offset in bytes from the start of ring data below
*/
volatile uint32_t write_index;
/*
* offset in bytes from the start of ring data below
*/
volatile uint32_t read_index;
/*
* NOTE: The interrupt_mask field is used only for channels, but
* vmbus connection also uses this data structure
*/
volatile uint32_t interrupt_mask;
/* pad it to PAGE_SIZE so that data starts on a page */
uint8_t reserved[4084];
/*
* WARNING: Ring data starts here + ring_data_start_offset
* !!! DO NOT place any fields below this !!!
*/
uint8_t buffer[0]; /* doubles as interrupt mask */
} __packed hv_vmbus_ring_buffer;
typedef struct {
int length;
int offset;
uint64_t pfn;
} __packed hv_vmbus_page_buffer;
typedef struct {
int length;
int offset;
uint64_t pfn_array[HV_MAX_MULTIPAGE_BUFFER_COUNT];
} __packed hv_vmbus_multipage_buffer;
typedef struct {
hv_vmbus_ring_buffer* ring_buffer;
uint32_t ring_size; /* Include the shared header */
struct mtx ring_lock;
uint32_t ring_data_size; /* ring_size */
uint32_t ring_data_start_offset;
} hv_vmbus_ring_buffer_info;
typedef void (*hv_vmbus_pfn_channel_callback)(void *context);
typedef enum {
HV_CHANNEL_OFFER_STATE,
HV_CHANNEL_OPENING_STATE,
HV_CHANNEL_OPEN_STATE,
HV_CHANNEL_OPENED_STATE,
HV_CHANNEL_CLOSING_NONDESTRUCTIVE_STATE,
} hv_vmbus_channel_state;
/*
* Connection identifier type
*/
typedef union {
uint32_t as_uint32_t;
struct {
uint32_t id:24;
uint32_t reserved:8;
} u;
} __packed hv_vmbus_connection_id;
/*
* Definition of the hv_vmbus_signal_event hypercall input structure
*/
typedef struct {
hv_vmbus_connection_id connection_id;
uint16_t flag_number;
uint16_t rsvd_z;
} __packed hv_vmbus_input_signal_event;
typedef struct {
uint64_t align8;
hv_vmbus_input_signal_event event;
} __packed hv_vmbus_input_signal_event_buffer;
typedef struct hv_vmbus_channel {
TAILQ_ENTRY(hv_vmbus_channel) list_entry;
struct hv_device* device;
struct vmbus_softc *vmbus_sc;
hv_vmbus_channel_state state;
hv_vmbus_channel_offer_channel offer_msg;
/*
* These are based on the offer_msg.monitor_id.
* Save it here for easy access.
*/
uint8_t monitor_group;
uint8_t monitor_bit;
uint32_t ring_buffer_gpadl_handle;
/*
* Allocated memory for ring buffer
*/
void* ring_buffer_pages;
unsigned long ring_buffer_size;
uint32_t ring_buffer_page_count;
/*
* send to parent
*/
hv_vmbus_ring_buffer_info outbound;
/*
* receive from parent
*/
hv_vmbus_ring_buffer_info inbound;
struct taskqueue * rxq;
struct task channel_task;
hv_vmbus_pfn_channel_callback on_channel_callback;
void* channel_callback_context;
/*
* If batched_reading is set to "true", mask the interrupt
* and read until the channel is empty.
* If batched_reading is set to "false", the channel is not
* going to perform batched reading.
*
* Batched reading is enabled by default; specific
* drivers that don't want this behavior can turn it off.
*/
boolean_t batched_reading;
boolean_t is_dedicated_interrupt;
/*
* Used as an input param for HV_CALL_SIGNAL_EVENT hypercall.
*/
hv_vmbus_input_signal_event_buffer signal_event_buffer;
/*
* 8-bytes aligned of the buffer above
*/
hv_vmbus_input_signal_event *signal_event_param;
/*
* From Win8, this field specifies the target virtual process
* on which to deliver the interrupt from the host to guest.
* Before Win8, all channel interrupts would only be
* delivered on cpu 0. Setting this value to 0 would preserve
* the earlier behavior.
*/
uint32_t target_vcpu;
/* The corresponding CPUID in the guest */
uint32_t target_cpu;
/*
* Support for multi-channels.
* The initial offer is considered the primary channel and this
* offer message will indicate if the host supports multi-channels.
* The guest is free to ask for multi-channels to be offerred and can
* open these multi-channels as a normal "primary" channel. However,
* all multi-channels will have the same type and instance guids as the
* primary channel. Requests sent on a given channel will result in a
* response on the same channel.
*/
struct mtx sc_lock;
/*
* Link list of all the multi-channels if this is a primary channel
*/
TAILQ_HEAD(, hv_vmbus_channel) sc_list_anchor;
TAILQ_ENTRY(hv_vmbus_channel) sc_list_entry;
int subchan_cnt;
/*
* The primary channel this sub-channle belongs to.
* This will be NULL for the primary channel.
*/
struct hv_vmbus_channel *primary_channel;
/*
* Driver private data
*/
void *hv_chan_priv1;
void *hv_chan_priv2;
void *hv_chan_priv3;
struct task ch_detach_task;
} hv_vmbus_channel;
#define HV_VMBUS_CHAN_ISPRIMARY(chan) ((chan)->primary_channel == NULL)
static inline void
hv_set_channel_read_state(hv_vmbus_channel* channel, boolean_t state)
{
channel->batched_reading = state;
}
typedef struct hv_device {
hv_guid class_id;
hv_guid device_id;
device_t device;
hv_vmbus_channel* channel;
} hv_device;
int hv_vmbus_channel_recv_packet(
hv_vmbus_channel* channel,
void* buffer,
uint32_t buffer_len,
uint32_t* buffer_actual_len,
uint64_t* request_id);
int hv_vmbus_channel_recv_packet_raw(
hv_vmbus_channel* channel,
void* buffer,
uint32_t buffer_len,
uint32_t* buffer_actual_len,
uint64_t* request_id);
int hv_vmbus_channel_open(
hv_vmbus_channel* channel,
uint32_t send_ring_buffer_size,
uint32_t recv_ring_buffer_size,
void* user_data,
uint32_t user_data_len,
hv_vmbus_pfn_channel_callback
pfn_on_channel_callback,
void* context);
void hv_vmbus_channel_close(hv_vmbus_channel *channel);
int hv_vmbus_channel_send_packet(
hv_vmbus_channel* channel,
void* buffer,
uint32_t buffer_len,
uint64_t request_id,
hv_vmbus_packet_type type,
uint32_t flags);
int hv_vmbus_channel_send_packet_pagebuffer(
hv_vmbus_channel* channel,
hv_vmbus_page_buffer page_buffers[],
uint32_t page_count,
void* buffer,
uint32_t buffer_len,
uint64_t request_id);
int hv_vmbus_channel_send_packet_multipagebuffer(
hv_vmbus_channel* channel,
hv_vmbus_multipage_buffer* multi_page_buffer,
void* buffer,
uint32_t buffer_len,
uint64_t request_id);
int hv_vmbus_channel_establish_gpadl(
hv_vmbus_channel* channel,
/* must be phys and virt contiguous */
void* contig_buffer,
/* page-size multiple */
uint32_t size,
uint32_t* gpadl_handle);
int hv_vmbus_channel_teardown_gpdal(
hv_vmbus_channel* channel,
uint32_t gpadl_handle);
struct hv_vmbus_channel* vmbus_select_outgoing_channel(struct hv_vmbus_channel *promary);
void vmbus_channel_cpu_set(struct hv_vmbus_channel *chan, int cpu);
struct hv_vmbus_channel **
vmbus_get_subchan(struct hv_vmbus_channel *pri_chan, int subchan_cnt);
void vmbus_rel_subchan(struct hv_vmbus_channel **subchan, int subchan_cnt);
/**
* @brief Get physical address from virtual
*/
static inline unsigned long
hv_get_phys_addr(void *virt)
{
unsigned long ret;
ret = (vtophys(virt) | ((vm_offset_t) virt & PAGE_MASK));
return (ret);
}
extern uint32_t hv_vmbus_protocal_version;
#endif /* __HYPERV_H__ */
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