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- /* SPDX-License-Identifier: GPL-2.0-only */
- /*
- *
- * Copyright (c) 2011, Microsoft Corporation.
- *
- * Authors:
- * Haiyang Zhang <haiyangz@microsoft.com>
- * Hank Janssen <hjanssen@microsoft.com>
- * K. Y. Srinivasan <kys@microsoft.com>
- */
- #ifndef _HYPERV_H
- #define _HYPERV_H
- #include <uapi/linux/hyperv.h>
- #include <linux/mm.h>
- #include <linux/types.h>
- #include <linux/scatterlist.h>
- #include <linux/list.h>
- #include <linux/timer.h>
- #include <linux/completion.h>
- #include <linux/device.h>
- #include <linux/mod_devicetable.h>
- #include <linux/interrupt.h>
- #include <linux/reciprocal_div.h>
- #include <asm/hyperv-tlfs.h>
- #define MAX_PAGE_BUFFER_COUNT 32
- #define MAX_MULTIPAGE_BUFFER_COUNT 32 /* 128K */
- #pragma pack(push, 1)
- /*
- * Types for GPADL, decides is how GPADL header is created.
- *
- * It doesn't make much difference between BUFFER and RING if PAGE_SIZE is the
- * same as HV_HYP_PAGE_SIZE.
- *
- * If PAGE_SIZE is bigger than HV_HYP_PAGE_SIZE, the headers of ring buffers
- * will be of PAGE_SIZE, however, only the first HV_HYP_PAGE will be put
- * into gpadl, therefore the number for HV_HYP_PAGE and the indexes of each
- * HV_HYP_PAGE will be different between different types of GPADL, for example
- * if PAGE_SIZE is 64K:
- *
- * BUFFER:
- *
- * gva: |-- 64k --|-- 64k --| ... |
- * gpa: | 4k | 4k | ... | 4k | 4k | 4k | ... | 4k |
- * index: 0 1 2 15 16 17 18 .. 31 32 ...
- * | | ... | | | ... | ...
- * v V V V V V
- * gpadl: | 4k | 4k | ... | 4k | 4k | 4k | ... | 4k | ... |
- * index: 0 1 2 ... 15 16 17 18 .. 31 32 ...
- *
- * RING:
- *
- * | header | data | header | data |
- * gva: |-- 64k --|-- 64k --| ... |-- 64k --|-- 64k --| ... |
- * gpa: | 4k | .. | 4k | 4k | ... | 4k | ... | 4k | .. | 4k | .. | ... |
- * index: 0 1 16 17 18 31 ... n n+1 n+16 ... 2n
- * | / / / | / /
- * | / / / | / /
- * | / / ... / ... | / ... /
- * | / / / | / /
- * | / / / | / /
- * V V V V V V v
- * gpadl: | 4k | 4k | ... | ... | 4k | 4k | ... |
- * index: 0 1 2 ... 16 ... n-15 n-14 n-13 ... 2n-30
- */
- enum hv_gpadl_type {
- HV_GPADL_BUFFER,
- HV_GPADL_RING
- };
- /* 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];
- };
- /*
- * Multiple-page buffer array; the pfn array is variable size:
- * The number of entries in the PFN array is determined by
- * "len" and "offset".
- */
- struct hv_mpb_array {
- /* Length and Offset determines the # of pfns in the array */
- u32 len;
- u32 offset;
- u64 pfn_array[];
- };
- /* 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;
- /*
- * WS2012/Win8 and later versions of Hyper-V implement interrupt
- * driven flow management. The feature bit feat_pending_send_sz
- * is set by the host on the host->guest ring buffer, and by the
- * guest on the guest->host ring buffer.
- *
- * The meaning of the feature bit is a bit complex in that it has
- * semantics that apply to both ring buffers. If the guest sets
- * the feature bit in the guest->host ring buffer, the guest is
- * telling the host that:
- * 1) It will set the pending_send_sz field in the guest->host ring
- * buffer when it is waiting for space to become available, and
- * 2) It will read the pending_send_sz field in the host->guest
- * ring buffer and interrupt the host when it frees enough space
- *
- * Similarly, if the host sets the feature bit in the host->guest
- * ring buffer, the host is telling the guest that:
- * 1) It will set the pending_send_sz field in the host->guest ring
- * buffer when it is waiting for space to become available, and
- * 2) It will read the pending_send_sz field in the guest->host
- * ring buffer and interrupt the guest when it frees enough space
- *
- * If either the guest or host does not set the feature bit that it
- * owns, that guest or host must do polling if it encounters a full
- * ring buffer, and not signal the other end with an interrupt.
- */
- u32 pending_send_sz;
- u32 reserved1[12];
- union {
- struct {
- u32 feat_pending_send_sz:1;
- };
- u32 value;
- } feature_bits;
- /* Pad it to PAGE_SIZE so that data starts on page boundary */
- u8 reserved2[PAGE_SIZE - 68];
- /*
- * Ring data starts here + RingDataStartOffset
- * !!! DO NOT place any fields below this !!!
- */
- u8 buffer[];
- } __packed;
- /* Calculate the proper size of a ringbuffer, it must be page-aligned */
- #define VMBUS_RING_SIZE(payload_sz) PAGE_ALIGN(sizeof(struct hv_ring_buffer) + \
- (payload_sz))
- struct hv_ring_buffer_info {
- struct hv_ring_buffer *ring_buffer;
- u32 ring_size; /* Include the shared header */
- struct reciprocal_value ring_size_div10_reciprocal;
- spinlock_t ring_lock;
- u32 ring_datasize; /* < ring_size */
- u32 priv_read_index;
- /*
- * The ring buffer mutex lock. This lock prevents the ring buffer from
- * being freed while the ring buffer is being accessed.
- */
- struct mutex ring_buffer_mutex;
- };
- static inline u32 hv_get_bytes_to_read(const struct hv_ring_buffer_info *rbi)
- {
- u32 read_loc, write_loc, dsize, read;
- dsize = rbi->ring_datasize;
- read_loc = rbi->ring_buffer->read_index;
- write_loc = READ_ONCE(rbi->ring_buffer->write_index);
- read = write_loc >= read_loc ? (write_loc - read_loc) :
- (dsize - read_loc) + write_loc;
- return read;
- }
- static inline u32 hv_get_bytes_to_write(const struct hv_ring_buffer_info *rbi)
- {
- u32 read_loc, write_loc, dsize, write;
- dsize = rbi->ring_datasize;
- read_loc = READ_ONCE(rbi->ring_buffer->read_index);
- write_loc = rbi->ring_buffer->write_index;
- write = write_loc >= read_loc ? dsize - (write_loc - read_loc) :
- read_loc - write_loc;
- return write;
- }
- static inline u32 hv_get_avail_to_write_percent(
- const struct hv_ring_buffer_info *rbi)
- {
- u32 avail_write = hv_get_bytes_to_write(rbi);
- return reciprocal_divide(
- (avail_write << 3) + (avail_write << 1),
- rbi->ring_size_div10_reciprocal);
- }
- /*
- * VMBUS version is 32 bit entity broken up into
- * two 16 bit quantities: major_number. minor_number.
- *
- * 0 . 13 (Windows Server 2008)
- * 1 . 1 (Windows 7)
- * 2 . 4 (Windows 8)
- * 3 . 0 (Windows 8 R2)
- * 4 . 0 (Windows 10)
- * 4 . 1 (Windows 10 RS3)
- * 5 . 0 (Newer Windows 10)
- * 5 . 1 (Windows 10 RS4)
- * 5 . 2 (Windows Server 2019, RS5)
- */
- #define VERSION_WS2008 ((0 << 16) | (13))
- #define VERSION_WIN7 ((1 << 16) | (1))
- #define VERSION_WIN8 ((2 << 16) | (4))
- #define VERSION_WIN8_1 ((3 << 16) | (0))
- #define VERSION_WIN10 ((4 << 16) | (0))
- #define VERSION_WIN10_V4_1 ((4 << 16) | (1))
- #define VERSION_WIN10_V5 ((5 << 16) | (0))
- #define VERSION_WIN10_V5_1 ((5 << 16) | (1))
- #define VERSION_WIN10_V5_2 ((5 << 16) | (2))
- /* 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 {
- guid_t if_type;
- guid_t if_instance;
- /*
- * These two fields are not currently used.
- */
- u64 reserved1;
- u64 reserved2;
- 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;
- /*
- * The sub_channel_index is defined in Win8: a value of zero means a
- * primary channel and a value of non-zero means a sub-channel.
- *
- * Before Win8, the field is reserved, meaning it's always zero.
- */
- u16 sub_channel_index;
- u16 reserved3;
- } __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
- #define VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER 0x2000
- 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;
- u8 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[];
- };
- /*
- * 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
- /* Version 1 messages */
- enum vmbus_channel_message_type {
- CHANNELMSG_INVALID = 0,
- CHANNELMSG_OFFERCHANNEL = 1,
- CHANNELMSG_RESCIND_CHANNELOFFER = 2,
- CHANNELMSG_REQUESTOFFERS = 3,
- CHANNELMSG_ALLOFFERS_DELIVERED = 4,
- CHANNELMSG_OPENCHANNEL = 5,
- CHANNELMSG_OPENCHANNEL_RESULT = 6,
- CHANNELMSG_CLOSECHANNEL = 7,
- CHANNELMSG_GPADL_HEADER = 8,
- CHANNELMSG_GPADL_BODY = 9,
- CHANNELMSG_GPADL_CREATED = 10,
- CHANNELMSG_GPADL_TEARDOWN = 11,
- CHANNELMSG_GPADL_TORNDOWN = 12,
- CHANNELMSG_RELID_RELEASED = 13,
- CHANNELMSG_INITIATE_CONTACT = 14,
- CHANNELMSG_VERSION_RESPONSE = 15,
- CHANNELMSG_UNLOAD = 16,
- CHANNELMSG_UNLOAD_RESPONSE = 17,
- CHANNELMSG_18 = 18,
- CHANNELMSG_19 = 19,
- CHANNELMSG_20 = 20,
- CHANNELMSG_TL_CONNECT_REQUEST = 21,
- CHANNELMSG_MODIFYCHANNEL = 22,
- CHANNELMSG_TL_CONNECT_RESULT = 23,
- CHANNELMSG_COUNT
- };
- /* Hyper-V supports about 2048 channels, and the RELIDs start with 1. */
- #define INVALID_RELID U32_MAX
- struct vmbus_channel_message_header {
- enum vmbus_channel_message_type msgtype;
- u32 padding;
- } __packed;
- /* Query VMBus Version parameters */
- struct vmbus_channel_query_vmbus_version {
- struct vmbus_channel_message_header header;
- u32 version;
- } __packed;
- /* VMBus Version Supported parameters */
- struct vmbus_channel_version_supported {
- struct vmbus_channel_message_header header;
- u8 version_supported;
- } __packed;
- /* Offer Channel parameters */
- struct vmbus_channel_offer_channel {
- struct vmbus_channel_message_header header;
- struct vmbus_channel_offer offer;
- u32 child_relid;
- u8 monitorid;
- /*
- * win7 and beyond splits this field into a bit field.
- */
- u8 monitor_allocated:1;
- u8 reserved:7;
- /*
- * These are new fields added in win7 and later.
- * Do not access these fields without checking the
- * negotiated protocol.
- *
- * 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 to be used in signaling the host.
- */
- u16 is_dedicated_interrupt:1;
- u16 reserved1:15;
- u32 connection_id;
- } __packed;
- /* Rescind Offer parameters */
- struct vmbus_channel_rescind_offer {
- struct vmbus_channel_message_header header;
- u32 child_relid;
- } __packed;
- static inline u32
- hv_ringbuffer_pending_size(const struct hv_ring_buffer_info *rbi)
- {
- return rbi->ring_buffer->pending_send_sz;
- }
- /*
- * 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 */
- struct vmbus_channel_open_channel {
- struct vmbus_channel_message_header header;
- /* Identifies the specific VMBus channel that is being opened. */
- u32 child_relid;
- /* ID making a particular open request at a channel offer unique. */
- u32 openid;
- /* GPADL for the channel's ring buffer. */
- u32 ringbuffer_gpadlhandle;
- /*
- * Starting with win8, this field will be used to specify
- * the target virtual processor on which to deliver the interrupt for
- * the host to guest communication.
- * Prior to win8, incoming channel interrupts would only
- * be delivered on cpu 0. Setting this value to 0 would
- * preserve the earlier behavior.
- */
- u32 target_vp;
- /*
- * The upstream ring buffer begins at offset zero in the memory
- * described by RingBufferGpadlHandle. The downstream ring buffer
- * follows it at this offset (in pages).
- */
- u32 downstream_ringbuffer_pageoffset;
- /* User-specific data to be passed along to the server endpoint. */
- unsigned char userdata[MAX_USER_DEFINED_BYTES];
- } __packed;
- /* Open Channel Result parameters */
- struct vmbus_channel_open_result {
- struct vmbus_channel_message_header header;
- u32 child_relid;
- u32 openid;
- u32 status;
- } __packed;
- /* Close channel parameters; */
- struct vmbus_channel_close_channel {
- struct vmbus_channel_message_header header;
- u32 child_relid;
- } __packed;
- /* Channel Message GPADL */
- #define GPADL_TYPE_RING_BUFFER 1
- #define GPADL_TYPE_SERVER_SAVE_AREA 2
- #define GPADL_TYPE_TRANSACTION 8
- /*
- * The number of PFNs in a GPADL message is defined by the number of
- * pages that would be spanned by ByteCount and ByteOffset. If the
- * implied number of PFNs won't fit in this packet, there will be a
- * follow-up packet that contains more.
- */
- struct vmbus_channel_gpadl_header {
- struct vmbus_channel_message_header header;
- u32 child_relid;
- u32 gpadl;
- u16 range_buflen;
- u16 rangecount;
- struct gpa_range range[];
- } __packed;
- /* This is the followup packet that contains more PFNs. */
- struct vmbus_channel_gpadl_body {
- struct vmbus_channel_message_header header;
- u32 msgnumber;
- u32 gpadl;
- u64 pfn[];
- } __packed;
- struct vmbus_channel_gpadl_created {
- struct vmbus_channel_message_header header;
- u32 child_relid;
- u32 gpadl;
- u32 creation_status;
- } __packed;
- struct vmbus_channel_gpadl_teardown {
- struct vmbus_channel_message_header header;
- u32 child_relid;
- u32 gpadl;
- } __packed;
- struct vmbus_channel_gpadl_torndown {
- struct vmbus_channel_message_header header;
- u32 gpadl;
- } __packed;
- struct vmbus_channel_relid_released {
- struct vmbus_channel_message_header header;
- u32 child_relid;
- } __packed;
- struct vmbus_channel_initiate_contact {
- struct vmbus_channel_message_header header;
- u32 vmbus_version_requested;
- u32 target_vcpu; /* The VCPU the host should respond to */
- union {
- u64 interrupt_page;
- struct {
- u8 msg_sint;
- u8 padding1[3];
- u32 padding2;
- };
- };
- u64 monitor_page1;
- u64 monitor_page2;
- } __packed;
- /* Hyper-V socket: guest's connect()-ing to host */
- struct vmbus_channel_tl_connect_request {
- struct vmbus_channel_message_header header;
- guid_t guest_endpoint_id;
- guid_t host_service_id;
- } __packed;
- /* Modify Channel parameters, cf. vmbus_send_modifychannel() */
- struct vmbus_channel_modifychannel {
- struct vmbus_channel_message_header header;
- u32 child_relid;
- u32 target_vp;
- } __packed;
- struct vmbus_channel_version_response {
- struct vmbus_channel_message_header header;
- u8 version_supported;
- u8 connection_state;
- u16 padding;
- /*
- * On new hosts that support VMBus protocol 5.0, we must use
- * VMBUS_MESSAGE_CONNECTION_ID_4 for the Initiate Contact Message,
- * and for subsequent messages, we must use the Message Connection ID
- * field in the host-returned Version Response Message.
- *
- * On old hosts, we should always use VMBUS_MESSAGE_CONNECTION_ID (1).
- */
- u32 msg_conn_id;
- } __packed;
- enum vmbus_channel_state {
- CHANNEL_OFFER_STATE,
- CHANNEL_OPENING_STATE,
- CHANNEL_OPEN_STATE,
- CHANNEL_OPENED_STATE,
- };
- /*
- * Represents each channel msg on the vmbus connection This is a
- * variable-size data structure depending on the msg type itself
- */
- struct vmbus_channel_msginfo {
- /* Bookkeeping stuff */
- struct list_head msglistentry;
- /* So far, this is only used to handle gpadl body message */
- struct list_head submsglist;
- /* Synchronize the request/response if needed */
- struct completion waitevent;
- struct vmbus_channel *waiting_channel;
- union {
- struct vmbus_channel_version_supported version_supported;
- struct vmbus_channel_open_result open_result;
- struct vmbus_channel_gpadl_torndown gpadl_torndown;
- struct vmbus_channel_gpadl_created gpadl_created;
- struct vmbus_channel_version_response version_response;
- } response;
- u32 msgsize;
- /*
- * The channel message that goes out on the "wire".
- * It will contain at minimum the VMBUS_CHANNEL_MESSAGE_HEADER header
- */
- unsigned char msg[];
- };
- struct vmbus_close_msg {
- struct vmbus_channel_msginfo info;
- struct vmbus_channel_close_channel msg;
- };
- /* Define connection identifier type. */
- union hv_connection_id {
- u32 asu32;
- struct {
- u32 id:24;
- u32 reserved:8;
- } u;
- };
- enum vmbus_device_type {
- HV_IDE = 0,
- HV_SCSI,
- HV_FC,
- HV_NIC,
- HV_ND,
- HV_PCIE,
- HV_FB,
- HV_KBD,
- HV_MOUSE,
- HV_KVP,
- HV_TS,
- HV_HB,
- HV_SHUTDOWN,
- HV_FCOPY,
- HV_BACKUP,
- HV_DM,
- HV_UNKNOWN,
- };
- struct vmbus_device {
- u16 dev_type;
- guid_t guid;
- bool perf_device;
- };
- struct vmbus_channel {
- struct list_head listentry;
- struct hv_device *device_obj;
- enum vmbus_channel_state state;
- struct vmbus_channel_offer_channel offermsg;
- /*
- * These are based on the OfferMsg.MonitorId.
- * Save it here for easy access.
- */
- u8 monitor_grp;
- u8 monitor_bit;
- bool rescind; /* got rescind msg */
- struct completion rescind_event;
- u32 ringbuffer_gpadlhandle;
- /* Allocated memory for ring buffer */
- struct page *ringbuffer_page;
- u32 ringbuffer_pagecount;
- u32 ringbuffer_send_offset;
- struct hv_ring_buffer_info outbound; /* send to parent */
- struct hv_ring_buffer_info inbound; /* receive from parent */
- struct vmbus_close_msg close_msg;
- /* Statistics */
- u64 interrupts; /* Host to Guest interrupts */
- u64 sig_events; /* Guest to Host events */
- /*
- * Guest to host interrupts caused by the outbound ring buffer changing
- * from empty to not empty.
- */
- u64 intr_out_empty;
- /*
- * Indicates that a full outbound ring buffer was encountered. The flag
- * is set to true when a full outbound ring buffer is encountered and
- * set to false when a write to the outbound ring buffer is completed.
- */
- bool out_full_flag;
- /* Channel callback's invoked in softirq context */
- struct tasklet_struct callback_event;
- void (*onchannel_callback)(void *context);
- void *channel_callback_context;
- void (*change_target_cpu_callback)(struct vmbus_channel *channel,
- u32 old, u32 new);
- /*
- * Synchronize channel scheduling and channel removal; see the inline
- * comments in vmbus_chan_sched() and vmbus_reset_channel_cb().
- */
- spinlock_t sched_lock;
- /*
- * A channel can be marked for one of three modes of reading:
- * BATCHED - callback called from taslket and should read
- * channel until empty. Interrupts from the host
- * are masked while read is in process (default).
- * DIRECT - callback called from tasklet (softirq).
- * ISR - callback called in interrupt context and must
- * invoke its own deferred processing.
- * Host interrupts are disabled and must be re-enabled
- * when ring is empty.
- */
- enum hv_callback_mode {
- HV_CALL_BATCHED,
- HV_CALL_DIRECT,
- HV_CALL_ISR
- } callback_mode;
- bool is_dedicated_interrupt;
- u64 sig_event;
- /*
- * Starting with win8, this field will be used to specify the
- * target CPU on which to deliver the interrupt for the host
- * to guest communication.
- *
- * Prior to win8, incoming channel interrupts would only be
- * delivered on CPU 0. Setting this value to 0 would preserve
- * the earlier behavior.
- */
- u32 target_cpu;
- /*
- * Support for sub-channels. For high performance devices,
- * it will be useful to have multiple sub-channels to support
- * a scalable communication infrastructure with the host.
- * The support for sub-channels is implemented as an extention
- * to the current infrastructure.
- * The initial offer is considered the primary channel and this
- * offer message will indicate if the host supports sub-channels.
- * The guest is free to ask for sub-channels to be offerred and can
- * open these sub-channels as a normal "primary" channel. However,
- * all sub-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.
- */
- /*
- * Sub-channel creation callback. This callback will be called in
- * process context when a sub-channel offer is received from the host.
- * The guest can open the sub-channel in the context of this callback.
- */
- void (*sc_creation_callback)(struct vmbus_channel *new_sc);
- /*
- * Channel rescind callback. Some channels (the hvsock ones), need to
- * register a callback which is invoked in vmbus_onoffer_rescind().
- */
- void (*chn_rescind_callback)(struct vmbus_channel *channel);
- /*
- * All Sub-channels of a primary channel are linked here.
- */
- struct list_head sc_list;
- /*
- * The primary channel this sub-channel belongs to.
- * This will be NULL for the primary channel.
- */
- struct vmbus_channel *primary_channel;
- /*
- * Support per-channel state for use by vmbus drivers.
- */
- void *per_channel_state;
- /*
- * Defer freeing channel until after all cpu's have
- * gone through grace period.
- */
- struct rcu_head rcu;
- /*
- * For sysfs per-channel properties.
- */
- struct kobject kobj;
- /*
- * For performance critical channels (storage, networking
- * etc,), Hyper-V has a mechanism to enhance the throughput
- * at the expense of latency:
- * When the host is to be signaled, we just set a bit in a shared page
- * and this bit will be inspected by the hypervisor within a certain
- * window and if the bit is set, the host will be signaled. The window
- * of time is the monitor latency - currently around 100 usecs. This
- * mechanism improves throughput by:
- *
- * A) Making the host more efficient - each time it wakes up,
- * potentially it will process morev number of packets. The
- * monitor latency allows a batch to build up.
- * B) By deferring the hypercall to signal, we will also minimize
- * the interrupts.
- *
- * Clearly, these optimizations improve throughput at the expense of
- * latency. Furthermore, since the channel is shared for both
- * control and data messages, control messages currently suffer
- * unnecessary latency adversley impacting performance and boot
- * time. To fix this issue, permit tagging the channel as being
- * in "low latency" mode. In this mode, we will bypass the monitor
- * mechanism.
- */
- bool low_latency;
- bool probe_done;
- /*
- * Cache the device ID here for easy access; this is useful, in
- * particular, in situations where the channel's device_obj has
- * not been allocated/initialized yet.
- */
- u16 device_id;
- /*
- * We must offload the handling of the primary/sub channels
- * from the single-threaded vmbus_connection.work_queue to
- * two different workqueue, otherwise we can block
- * vmbus_connection.work_queue and hang: see vmbus_process_offer().
- */
- struct work_struct add_channel_work;
- /*
- * Guest to host interrupts caused by the inbound ring buffer changing
- * from full to not full while a packet is waiting.
- */
- u64 intr_in_full;
- /*
- * The total number of write operations that encountered a full
- * outbound ring buffer.
- */
- u64 out_full_total;
- /*
- * The number of write operations that were the first to encounter a
- * full outbound ring buffer.
- */
- u64 out_full_first;
- /* enabling/disabling fuzz testing on the channel (default is false)*/
- bool fuzz_testing_state;
- /*
- * Interrupt delay will delay the guest from emptying the ring buffer
- * for a specific amount of time. The delay is in microseconds and will
- * be between 1 to a maximum of 1000, its default is 0 (no delay).
- * The Message delay will delay guest reading on a per message basis
- * in microseconds between 1 to 1000 with the default being 0
- * (no delay).
- */
- u32 fuzz_testing_interrupt_delay;
- u32 fuzz_testing_message_delay;
- };
- static inline bool is_hvsock_channel(const struct vmbus_channel *c)
- {
- return !!(c->offermsg.offer.chn_flags &
- VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER);
- }
- static inline bool is_sub_channel(const struct vmbus_channel *c)
- {
- return c->offermsg.offer.sub_channel_index != 0;
- }
- static inline void set_channel_read_mode(struct vmbus_channel *c,
- enum hv_callback_mode mode)
- {
- c->callback_mode = mode;
- }
- static inline void set_per_channel_state(struct vmbus_channel *c, void *s)
- {
- c->per_channel_state = s;
- }
- static inline void *get_per_channel_state(struct vmbus_channel *c)
- {
- return c->per_channel_state;
- }
- static inline void set_channel_pending_send_size(struct vmbus_channel *c,
- u32 size)
- {
- unsigned long flags;
- if (size) {
- spin_lock_irqsave(&c->outbound.ring_lock, flags);
- ++c->out_full_total;
- if (!c->out_full_flag) {
- ++c->out_full_first;
- c->out_full_flag = true;
- }
- spin_unlock_irqrestore(&c->outbound.ring_lock, flags);
- } else {
- c->out_full_flag = false;
- }
- c->outbound.ring_buffer->pending_send_sz = size;
- }
- static inline void set_low_latency_mode(struct vmbus_channel *c)
- {
- c->low_latency = true;
- }
- static inline void clear_low_latency_mode(struct vmbus_channel *c)
- {
- c->low_latency = false;
- }
- void vmbus_onmessage(struct vmbus_channel_message_header *hdr);
- int vmbus_request_offers(void);
- /*
- * APIs for managing sub-channels.
- */
- void vmbus_set_sc_create_callback(struct vmbus_channel *primary_channel,
- void (*sc_cr_cb)(struct vmbus_channel *new_sc));
- void vmbus_set_chn_rescind_callback(struct vmbus_channel *channel,
- void (*chn_rescind_cb)(struct vmbus_channel *));
- /*
- * Check if sub-channels have already been offerred. This API will be useful
- * when the driver is unloaded after establishing sub-channels. In this case,
- * when the driver is re-loaded, the driver would have to check if the
- * subchannels have already been established before attempting to request
- * the creation of sub-channels.
- * This function returns TRUE to indicate that subchannels have already been
- * created.
- * This function should be invoked after setting the callback function for
- * sub-channel creation.
- */
- bool vmbus_are_subchannels_present(struct vmbus_channel *primary);
- /* The format must be the same as struct vmdata_gpa_direct */
- struct vmbus_channel_packet_page_buffer {
- u16 type;
- u16 dataoffset8;
- u16 length8;
- u16 flags;
- u64 transactionid;
- u32 reserved;
- u32 rangecount;
- struct hv_page_buffer range[MAX_PAGE_BUFFER_COUNT];
- } __packed;
- /* The format must be the same as struct vmdata_gpa_direct */
- struct vmbus_channel_packet_multipage_buffer {
- u16 type;
- u16 dataoffset8;
- u16 length8;
- u16 flags;
- u64 transactionid;
- u32 reserved;
- u32 rangecount; /* Always 1 in this case */
- struct hv_multipage_buffer range;
- } __packed;
- /* The format must be the same as struct vmdata_gpa_direct */
- struct vmbus_packet_mpb_array {
- u16 type;
- u16 dataoffset8;
- u16 length8;
- u16 flags;
- u64 transactionid;
- u32 reserved;
- u32 rangecount; /* Always 1 in this case */
- struct hv_mpb_array range;
- } __packed;
- int vmbus_alloc_ring(struct vmbus_channel *channel,
- u32 send_size, u32 recv_size);
- void vmbus_free_ring(struct vmbus_channel *channel);
- int vmbus_connect_ring(struct vmbus_channel *channel,
- void (*onchannel_callback)(void *context),
- void *context);
- int vmbus_disconnect_ring(struct vmbus_channel *channel);
- extern int vmbus_open(struct vmbus_channel *channel,
- u32 send_ringbuffersize,
- u32 recv_ringbuffersize,
- void *userdata,
- u32 userdatalen,
- void (*onchannel_callback)(void *context),
- void *context);
- extern void vmbus_close(struct vmbus_channel *channel);
- extern int vmbus_sendpacket(struct vmbus_channel *channel,
- void *buffer,
- u32 bufferLen,
- u64 requestid,
- enum vmbus_packet_type type,
- u32 flags);
- extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
- struct hv_page_buffer pagebuffers[],
- u32 pagecount,
- void *buffer,
- u32 bufferlen,
- u64 requestid);
- extern int vmbus_sendpacket_mpb_desc(struct vmbus_channel *channel,
- struct vmbus_packet_mpb_array *mpb,
- u32 desc_size,
- void *buffer,
- u32 bufferlen,
- u64 requestid);
- extern int vmbus_establish_gpadl(struct vmbus_channel *channel,
- void *kbuffer,
- u32 size,
- u32 *gpadl_handle);
- extern int vmbus_teardown_gpadl(struct vmbus_channel *channel,
- u32 gpadl_handle);
- void vmbus_reset_channel_cb(struct vmbus_channel *channel);
- extern int vmbus_recvpacket(struct vmbus_channel *channel,
- void *buffer,
- u32 bufferlen,
- u32 *buffer_actual_len,
- u64 *requestid);
- extern int vmbus_recvpacket_raw(struct vmbus_channel *channel,
- void *buffer,
- u32 bufferlen,
- u32 *buffer_actual_len,
- u64 *requestid);
- extern void vmbus_ontimer(unsigned long data);
- /* Base driver object */
- struct hv_driver {
- const char *name;
- /*
- * A hvsock offer, which has a VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER
- * channel flag, actually doesn't mean a synthetic device because the
- * offer's if_type/if_instance can change for every new hvsock
- * connection.
- *
- * However, to facilitate the notification of new-offer/rescind-offer
- * from vmbus driver to hvsock driver, we can handle hvsock offer as
- * a special vmbus device, and hence we need the below flag to
- * indicate if the driver is the hvsock driver or not: we need to
- * specially treat the hvosck offer & driver in vmbus_match().
- */
- bool hvsock;
- /* the device type supported by this driver */
- guid_t dev_type;
- const struct hv_vmbus_device_id *id_table;
- struct device_driver driver;
- /* dynamic device GUID's */
- struct {
- spinlock_t lock;
- struct list_head list;
- } dynids;
- int (*probe)(struct hv_device *, const struct hv_vmbus_device_id *);
- int (*remove)(struct hv_device *);
- void (*shutdown)(struct hv_device *);
- int (*suspend)(struct hv_device *);
- int (*resume)(struct hv_device *);
- };
- /* Base device object */
- struct hv_device {
- /* the device type id of this device */
- guid_t dev_type;
- /* the device instance id of this device */
- guid_t dev_instance;
- u16 vendor_id;
- u16 device_id;
- struct device device;
- char *driver_override; /* Driver name to force a match */
- struct vmbus_channel *channel;
- struct kset *channels_kset;
- /* place holder to keep track of the dir for hv device in debugfs */
- struct dentry *debug_dir;
- };
- static inline struct hv_device *device_to_hv_device(struct device *d)
- {
- return container_of(d, struct hv_device, device);
- }
- static inline struct hv_driver *drv_to_hv_drv(struct device_driver *d)
- {
- return container_of(d, struct hv_driver, driver);
- }
- static inline void hv_set_drvdata(struct hv_device *dev, void *data)
- {
- dev_set_drvdata(&dev->device, data);
- }
- static inline void *hv_get_drvdata(struct hv_device *dev)
- {
- return dev_get_drvdata(&dev->device);
- }
- 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;
- };
- int hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info,
- struct hv_ring_buffer_debug_info *debug_info);
- /* Vmbus interface */
- #define vmbus_driver_register(driver) \
- __vmbus_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
- int __must_check __vmbus_driver_register(struct hv_driver *hv_driver,
- struct module *owner,
- const char *mod_name);
- void vmbus_driver_unregister(struct hv_driver *hv_driver);
- void vmbus_hvsock_device_unregister(struct vmbus_channel *channel);
- int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj,
- resource_size_t min, resource_size_t max,
- resource_size_t size, resource_size_t align,
- bool fb_overlap_ok);
- void vmbus_free_mmio(resource_size_t start, resource_size_t size);
- /*
- * GUID definitions of various offer types - services offered to the guest.
- */
- /*
- * Network GUID
- * {f8615163-df3e-46c5-913f-f2d2f965ed0e}
- */
- #define HV_NIC_GUID \
- .guid = GUID_INIT(0xf8615163, 0xdf3e, 0x46c5, 0x91, 0x3f, \
- 0xf2, 0xd2, 0xf9, 0x65, 0xed, 0x0e)
- /*
- * IDE GUID
- * {32412632-86cb-44a2-9b5c-50d1417354f5}
- */
- #define HV_IDE_GUID \
- .guid = GUID_INIT(0x32412632, 0x86cb, 0x44a2, 0x9b, 0x5c, \
- 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5)
- /*
- * SCSI GUID
- * {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f}
- */
- #define HV_SCSI_GUID \
- .guid = GUID_INIT(0xba6163d9, 0x04a1, 0x4d29, 0xb6, 0x05, \
- 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f)
- /*
- * Shutdown GUID
- * {0e0b6031-5213-4934-818b-38d90ced39db}
- */
- #define HV_SHUTDOWN_GUID \
- .guid = GUID_INIT(0x0e0b6031, 0x5213, 0x4934, 0x81, 0x8b, \
- 0x38, 0xd9, 0x0c, 0xed, 0x39, 0xdb)
- /*
- * Time Synch GUID
- * {9527E630-D0AE-497b-ADCE-E80AB0175CAF}
- */
- #define HV_TS_GUID \
- .guid = GUID_INIT(0x9527e630, 0xd0ae, 0x497b, 0xad, 0xce, \
- 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf)
- /*
- * Heartbeat GUID
- * {57164f39-9115-4e78-ab55-382f3bd5422d}
- */
- #define HV_HEART_BEAT_GUID \
- .guid = GUID_INIT(0x57164f39, 0x9115, 0x4e78, 0xab, 0x55, \
- 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d)
- /*
- * KVP GUID
- * {a9a0f4e7-5a45-4d96-b827-8a841e8c03e6}
- */
- #define HV_KVP_GUID \
- .guid = GUID_INIT(0xa9a0f4e7, 0x5a45, 0x4d96, 0xb8, 0x27, \
- 0x8a, 0x84, 0x1e, 0x8c, 0x03, 0xe6)
- /*
- * Dynamic memory GUID
- * {525074dc-8985-46e2-8057-a307dc18a502}
- */
- #define HV_DM_GUID \
- .guid = GUID_INIT(0x525074dc, 0x8985, 0x46e2, 0x80, 0x57, \
- 0xa3, 0x07, 0xdc, 0x18, 0xa5, 0x02)
- /*
- * Mouse GUID
- * {cfa8b69e-5b4a-4cc0-b98b-8ba1a1f3f95a}
- */
- #define HV_MOUSE_GUID \
- .guid = GUID_INIT(0xcfa8b69e, 0x5b4a, 0x4cc0, 0xb9, 0x8b, \
- 0x8b, 0xa1, 0xa1, 0xf3, 0xf9, 0x5a)
- /*
- * Keyboard GUID
- * {f912ad6d-2b17-48ea-bd65-f927a61c7684}
- */
- #define HV_KBD_GUID \
- .guid = GUID_INIT(0xf912ad6d, 0x2b17, 0x48ea, 0xbd, 0x65, \
- 0xf9, 0x27, 0xa6, 0x1c, 0x76, 0x84)
- /*
- * VSS (Backup/Restore) GUID
- */
- #define HV_VSS_GUID \
- .guid = GUID_INIT(0x35fa2e29, 0xea23, 0x4236, 0x96, 0xae, \
- 0x3a, 0x6e, 0xba, 0xcb, 0xa4, 0x40)
- /*
- * Synthetic Video GUID
- * {DA0A7802-E377-4aac-8E77-0558EB1073F8}
- */
- #define HV_SYNTHVID_GUID \
- .guid = GUID_INIT(0xda0a7802, 0xe377, 0x4aac, 0x8e, 0x77, \
- 0x05, 0x58, 0xeb, 0x10, 0x73, 0xf8)
- /*
- * Synthetic FC GUID
- * {2f9bcc4a-0069-4af3-b76b-6fd0be528cda}
- */
- #define HV_SYNTHFC_GUID \
- .guid = GUID_INIT(0x2f9bcc4a, 0x0069, 0x4af3, 0xb7, 0x6b, \
- 0x6f, 0xd0, 0xbe, 0x52, 0x8c, 0xda)
- /*
- * Guest File Copy Service
- * {34D14BE3-DEE4-41c8-9AE7-6B174977C192}
- */
- #define HV_FCOPY_GUID \
- .guid = GUID_INIT(0x34d14be3, 0xdee4, 0x41c8, 0x9a, 0xe7, \
- 0x6b, 0x17, 0x49, 0x77, 0xc1, 0x92)
- /*
- * NetworkDirect. This is the guest RDMA service.
- * {8c2eaf3d-32a7-4b09-ab99-bd1f1c86b501}
- */
- #define HV_ND_GUID \
- .guid = GUID_INIT(0x8c2eaf3d, 0x32a7, 0x4b09, 0xab, 0x99, \
- 0xbd, 0x1f, 0x1c, 0x86, 0xb5, 0x01)
- /*
- * PCI Express Pass Through
- * {44C4F61D-4444-4400-9D52-802E27EDE19F}
- */
- #define HV_PCIE_GUID \
- .guid = GUID_INIT(0x44c4f61d, 0x4444, 0x4400, 0x9d, 0x52, \
- 0x80, 0x2e, 0x27, 0xed, 0xe1, 0x9f)
- /*
- * Linux doesn't support the 3 devices: the first two are for
- * Automatic Virtual Machine Activation, and the third is for
- * Remote Desktop Virtualization.
- * {f8e65716-3cb3-4a06-9a60-1889c5cccab5}
- * {3375baf4-9e15-4b30-b765-67acb10d607b}
- * {276aacf4-ac15-426c-98dd-7521ad3f01fe}
- */
- #define HV_AVMA1_GUID \
- .guid = GUID_INIT(0xf8e65716, 0x3cb3, 0x4a06, 0x9a, 0x60, \
- 0x18, 0x89, 0xc5, 0xcc, 0xca, 0xb5)
- #define HV_AVMA2_GUID \
- .guid = GUID_INIT(0x3375baf4, 0x9e15, 0x4b30, 0xb7, 0x65, \
- 0x67, 0xac, 0xb1, 0x0d, 0x60, 0x7b)
- #define HV_RDV_GUID \
- .guid = GUID_INIT(0x276aacf4, 0xac15, 0x426c, 0x98, 0xdd, \
- 0x75, 0x21, 0xad, 0x3f, 0x01, 0xfe)
- /*
- * Common header for Hyper-V ICs
- */
- #define ICMSGTYPE_NEGOTIATE 0
- #define ICMSGTYPE_HEARTBEAT 1
- #define ICMSGTYPE_KVPEXCHANGE 2
- #define ICMSGTYPE_SHUTDOWN 3
- #define ICMSGTYPE_TIMESYNC 4
- #define ICMSGTYPE_VSS 5
- #define ICMSGHDRFLAG_TRANSACTION 1
- #define ICMSGHDRFLAG_REQUEST 2
- #define ICMSGHDRFLAG_RESPONSE 4
- /*
- * While we want to handle util services as regular devices,
- * there is only one instance of each of these services; so
- * we statically allocate the service specific state.
- */
- struct hv_util_service {
- u8 *recv_buffer;
- void *channel;
- void (*util_cb)(void *);
- int (*util_init)(struct hv_util_service *);
- void (*util_deinit)(void);
- int (*util_pre_suspend)(void);
- int (*util_pre_resume)(void);
- };
- struct vmbuspipe_hdr {
- u32 flags;
- u32 msgsize;
- } __packed;
- struct ic_version {
- u16 major;
- u16 minor;
- } __packed;
- struct icmsg_hdr {
- struct ic_version icverframe;
- u16 icmsgtype;
- struct ic_version icvermsg;
- u16 icmsgsize;
- u32 status;
- u8 ictransaction_id;
- u8 icflags;
- u8 reserved[2];
- } __packed;
- struct icmsg_negotiate {
- u16 icframe_vercnt;
- u16 icmsg_vercnt;
- u32 reserved;
- struct ic_version icversion_data[1]; /* any size array */
- } __packed;
- struct shutdown_msg_data {
- u32 reason_code;
- u32 timeout_seconds;
- u32 flags;
- u8 display_message[2048];
- } __packed;
- struct heartbeat_msg_data {
- u64 seq_num;
- u32 reserved[8];
- } __packed;
- /* Time Sync IC defs */
- #define ICTIMESYNCFLAG_PROBE 0
- #define ICTIMESYNCFLAG_SYNC 1
- #define ICTIMESYNCFLAG_SAMPLE 2
- #ifdef __x86_64__
- #define WLTIMEDELTA 116444736000000000L /* in 100ns unit */
- #else
- #define WLTIMEDELTA 116444736000000000LL
- #endif
- struct ictimesync_data {
- u64 parenttime;
- u64 childtime;
- u64 roundtriptime;
- u8 flags;
- } __packed;
- struct ictimesync_ref_data {
- u64 parenttime;
- u64 vmreferencetime;
- u8 flags;
- char leapflags;
- char stratum;
- u8 reserved[3];
- } __packed;
- struct hyperv_service_callback {
- u8 msg_type;
- char *log_msg;
- guid_t data;
- struct vmbus_channel *channel;
- void (*callback)(void *context);
- };
- #define MAX_SRV_VER 0x7ffffff
- extern bool vmbus_prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, u8 *buf,
- const int *fw_version, int fw_vercnt,
- const int *srv_version, int srv_vercnt,
- int *nego_fw_version, int *nego_srv_version);
- void hv_process_channel_removal(struct vmbus_channel *channel);
- void vmbus_setevent(struct vmbus_channel *channel);
- /*
- * Negotiated version with the Host.
- */
- extern __u32 vmbus_proto_version;
- int vmbus_send_tl_connect_request(const guid_t *shv_guest_servie_id,
- const guid_t *shv_host_servie_id);
- int vmbus_send_modifychannel(u32 child_relid, u32 target_vp);
- void vmbus_set_event(struct vmbus_channel *channel);
- /* Get the start of the ring buffer. */
- static inline void *
- hv_get_ring_buffer(const struct hv_ring_buffer_info *ring_info)
- {
- return ring_info->ring_buffer->buffer;
- }
- /*
- * Mask off host interrupt callback notifications
- */
- static inline void hv_begin_read(struct hv_ring_buffer_info *rbi)
- {
- rbi->ring_buffer->interrupt_mask = 1;
- /* make sure mask update is not reordered */
- virt_mb();
- }
- /*
- * Re-enable host callback and return number of outstanding bytes
- */
- static inline u32 hv_end_read(struct hv_ring_buffer_info *rbi)
- {
- rbi->ring_buffer->interrupt_mask = 0;
- /* make sure mask update is not reordered */
- virt_mb();
- /*
- * Now check to see if the ring buffer is still empty.
- * If it is not, we raced and we need to process new
- * incoming messages.
- */
- return hv_get_bytes_to_read(rbi);
- }
- /*
- * An API to support in-place processing of incoming VMBUS packets.
- */
- /* Get data payload associated with descriptor */
- static inline void *hv_pkt_data(const struct vmpacket_descriptor *desc)
- {
- return (void *)((unsigned long)desc + (desc->offset8 << 3));
- }
- /* Get data size associated with descriptor */
- static inline u32 hv_pkt_datalen(const struct vmpacket_descriptor *desc)
- {
- return (desc->len8 << 3) - (desc->offset8 << 3);
- }
- struct vmpacket_descriptor *
- hv_pkt_iter_first(struct vmbus_channel *channel);
- struct vmpacket_descriptor *
- __hv_pkt_iter_next(struct vmbus_channel *channel,
- const struct vmpacket_descriptor *pkt);
- void hv_pkt_iter_close(struct vmbus_channel *channel);
- /*
- * Get next packet descriptor from iterator
- * If at end of list, return NULL and update host.
- */
- static inline struct vmpacket_descriptor *
- hv_pkt_iter_next(struct vmbus_channel *channel,
- const struct vmpacket_descriptor *pkt)
- {
- struct vmpacket_descriptor *nxt;
- nxt = __hv_pkt_iter_next(channel, pkt);
- if (!nxt)
- hv_pkt_iter_close(channel);
- return nxt;
- }
- #define foreach_vmbus_pkt(pkt, channel) \
- for (pkt = hv_pkt_iter_first(channel); pkt; \
- pkt = hv_pkt_iter_next(channel, pkt))
- /*
- * Interface for passing data between SR-IOV PF and VF drivers. The VF driver
- * sends requests to read and write blocks. Each block must be 128 bytes or
- * smaller. Optionally, the VF driver can register a callback function which
- * will be invoked when the host says that one or more of the first 64 block
- * IDs is "invalid" which means that the VF driver should reread them.
- */
- #define HV_CONFIG_BLOCK_SIZE_MAX 128
- int hyperv_read_cfg_blk(struct pci_dev *dev, void *buf, unsigned int buf_len,
- unsigned int block_id, unsigned int *bytes_returned);
- int hyperv_write_cfg_blk(struct pci_dev *dev, void *buf, unsigned int len,
- unsigned int block_id);
- int hyperv_reg_block_invalidate(struct pci_dev *dev, void *context,
- void (*block_invalidate)(void *context,
- u64 block_mask));
- struct hyperv_pci_block_ops {
- int (*read_block)(struct pci_dev *dev, void *buf, unsigned int buf_len,
- unsigned int block_id, unsigned int *bytes_returned);
- int (*write_block)(struct pci_dev *dev, void *buf, unsigned int len,
- unsigned int block_id);
- int (*reg_blk_invalidate)(struct pci_dev *dev, void *context,
- void (*block_invalidate)(void *context,
- u64 block_mask));
- };
- extern struct hyperv_pci_block_ops hvpci_block_ops;
- static inline unsigned long virt_to_hvpfn(void *addr)
- {
- phys_addr_t paddr;
- if (is_vmalloc_addr(addr))
- paddr = page_to_phys(vmalloc_to_page(addr)) +
- offset_in_page(addr);
- else
- paddr = __pa(addr);
- return paddr >> HV_HYP_PAGE_SHIFT;
- }
- #define NR_HV_HYP_PAGES_IN_PAGE (PAGE_SIZE / HV_HYP_PAGE_SIZE)
- #define offset_in_hvpage(ptr) ((unsigned long)(ptr) & ~HV_HYP_PAGE_MASK)
- #define HVPFN_UP(x) (((x) + HV_HYP_PAGE_SIZE-1) >> HV_HYP_PAGE_SHIFT)
- #define page_to_hvpfn(page) (page_to_pfn(page) * NR_HV_HYP_PAGES_IN_PAGE)
- #endif /* _HYPERV_H */
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