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99e315276a
freebsd-dev/sys/dev/hyperv/include/hyperv.h
Sepherosa Ziehau 99e315276a hyperv/vmbus: Fix sub-channel re-open support. 
For multi-channel devices, once the primary channel is closed,
a set of 'rescind' messages for sub-channels will be delivered
by Hypervisor.  Sub-channel MUST be freed according to these
'rescind' messages; directly re-openning sub-channels in the
same fashion as the primary channel's re-opening does NOT work
at all.

After the primary channel is re-opened, requested # of sub-
channels will be delivered though 'channel offer' messages, and
this set of newly offered channels can be opened along side with
the primary channel.

This unbreaks the MTU setting for hn(4), which requires re-
openning all existsing channels upon MTU change.

MFC after:	1 week
Sponsored by:	Microsoft OSTC
Differential Revision:	https://reviews.freebsd.org/D6978
2016-07-12 08:38:03 +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 <sys/sysctl.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>
#include <dev/hyperv/include/hyperv_busdma.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 VMBUS_VERSION_WS2008 ((0 << 16) | (13))
#define VMBUS_VERSION_WIN7 ((1 << 16) | (1))
#define VMBUS_VERSION_WIN8 ((2 << 16) | (4))
#define VMBUS_VERSION_WIN8_1 ((3 << 16) | (0))
#define VMBUS_VERSION_MAJOR(ver) (((uint32_t)(ver)) >> 16)
#define VMBUS_VERSION_MINOR(ver) (((uint32_t)(ver)) & 0xffff)
/*
* 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 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;
/*
* 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;
typedef struct {
hv_vmbus_channel_msg_header header;
uint32_t child_rel_id;
} __packed hv_vmbus_channel_relid_released;
#define HW_MACADDR_LEN 6
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;
typedef struct hv_vmbus_channel {
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;
struct hypercall_sigevt_in *ch_sigevt;
struct hyperv_dma ch_sigevt_dma;
/*
* 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;
TAILQ_ENTRY(hv_vmbus_channel) ch_link;
struct sysctl_ctx_list ch_sysctl_ctx;
} 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);
void vmbus_channel_cpu_rr(struct hv_vmbus_channel *chan);
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);
void vmbus_drain_subchan(struct hv_vmbus_channel *pri_chan);
/**
* @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);
}
#endif /* __HYPERV_H__ */
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