3 * Copyright (c) 2011, Microsoft Corporation.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
16 * Place - Suite 330, Boston, MA 02111-1307 USA.
19 * Haiyang Zhang <haiyangz@microsoft.com>
20 * Hank Janssen <hjanssen@microsoft.com>
21 * K. Y. Srinivasan <kys@microsoft.com>
28 #include <linux/types.h>
31 * An implementation of HyperV key value pair (KVP) functionality for Linux.
34 * Copyright (C) 2010, Novell, Inc.
35 * Author : K. Y. Srinivasan <ksrinivasan@novell.com>
40 * Maximum value size - used for both key names and value data, and includes
41 * any applicable NULL terminators.
43 * Note: This limit is somewhat arbitrary, but falls easily within what is
44 * supported for all native guests (back to Win 2000) and what is reasonable
45 * for the IC KVP exchange functionality. Note that Windows Me/98/95 are
46 * limited to 255 character key names.
48 * MSDN recommends not storing data values larger than 2048 bytes in the
51 * Note: This value is used in defining the KVP exchange message - this value
52 * cannot be modified without affecting the message size and compatibility.
56 * bytes, including any null terminators
58 #define HV_KVP_EXCHANGE_MAX_VALUE_SIZE (2048)
62 * Maximum key size - the registry limit for the length of an entry name
63 * is 256 characters, including the null terminator
66 #define HV_KVP_EXCHANGE_MAX_KEY_SIZE (512)
69 * In Linux, we implement the KVP functionality in two components:
70 * 1) The kernel component which is packaged as part of the hv_utils driver
71 * is responsible for communicating with the host and responsible for
72 * implementing the host/guest protocol. 2) A user level daemon that is
73 * responsible for data gathering.
75 * Host/Guest Protocol: The host iterates over an index and expects the guest
76 * to assign a key name to the index and also return the value corresponding to
77 * the key. The host will have atmost one KVP transaction outstanding at any
78 * given point in time. The host side iteration stops when the guest returns
79 * an error. Microsoft has specified the following mapping of key names to
80 * host specified index:
83 * 0 FullyQualifiedDomainName
84 * 1 IntegrationServicesVersion
85 * 2 NetworkAddressIPv4
86 * 3 NetworkAddressIPv6
92 * 9 ProcessorArchitecture
94 * The Windows host expects the Key Name and Key Value to be encoded in utf16.
96 * Guest Kernel/KVP Daemon Protocol: As noted earlier, we implement all of the
97 * data gathering functionality in a user mode daemon. The user level daemon
98 * is also responsible for binding the key name to the index as well. The
99 * kernel and user-level daemon communicate using a connector channel.
101 * The user mode component first registers with the
102 * the kernel component. Subsequently, the kernel component requests, data
103 * for the specified keys. In response to this message the user mode component
104 * fills in the value corresponding to the specified key. We overload the
105 * sequence field in the cn_msg header to define our KVP message types.
108 * The kernel component simply acts as a conduit for communication between the
109 * Windows host and the user-level daemon. The kernel component passes up the
110 * index received from the Host to the user-level daemon. If the index is
111 * valid (supported), the corresponding key as well as its
112 * value (both are strings) is returned. If the index is invalid
113 * (not supported), a NULL key string is returned.
118 * Registry value types.
123 enum hv_kvp_exchg_op {
129 KVP_OP_COUNT /* Number of operations, must be last. */
132 enum hv_kvp_exchg_pool {
133 KVP_POOL_EXTERNAL = 0,
136 KVP_POOL_AUTO_EXTERNAL,
137 KVP_POOL_AUTO_INTERNAL,
138 KVP_POOL_COUNT /* Number of pools, must be last. */
145 } __attribute__((packed));
147 struct hv_kvp_exchg_msg_value {
151 __u8 key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
153 __u8 value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
157 } __attribute__((packed));
159 struct hv_kvp_msg_enumerate {
161 struct hv_kvp_exchg_msg_value data;
162 } __attribute__((packed));
164 struct hv_kvp_msg_get {
165 struct hv_kvp_exchg_msg_value data;
168 struct hv_kvp_msg_set {
169 struct hv_kvp_exchg_msg_value data;
172 struct hv_kvp_msg_delete {
174 __u8 key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
177 struct hv_kvp_register {
178 __u8 version[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
182 struct hv_kvp_hdr kvp_hdr;
184 struct hv_kvp_msg_get kvp_get;
185 struct hv_kvp_msg_set kvp_set;
186 struct hv_kvp_msg_delete kvp_delete;
187 struct hv_kvp_msg_enumerate kvp_enum_data;
188 struct hv_kvp_register kvp_register;
190 } __attribute__((packed));
193 #include <linux/scatterlist.h>
194 #include <linux/list.h>
195 #include <linux/uuid.h>
196 #include <linux/timer.h>
197 #include <linux/workqueue.h>
198 #include <linux/completion.h>
199 #include <linux/device.h>
200 #include <linux/mod_devicetable.h>
203 #define MAX_PAGE_BUFFER_COUNT 19
204 #define MAX_MULTIPAGE_BUFFER_COUNT 32 /* 128K */
206 #pragma pack(push, 1)
208 /* Single-page buffer */
209 struct hv_page_buffer {
215 /* Multiple-page buffer */
216 struct hv_multipage_buffer {
217 /* Length and Offset determines the # of pfns in the array */
220 u64 pfn_array[MAX_MULTIPAGE_BUFFER_COUNT];
223 /* 0x18 includes the proprietary packet header */
224 #define MAX_PAGE_BUFFER_PACKET (0x18 + \
225 (sizeof(struct hv_page_buffer) * \
226 MAX_PAGE_BUFFER_COUNT))
227 #define MAX_MULTIPAGE_BUFFER_PACKET (0x18 + \
228 sizeof(struct hv_multipage_buffer))
233 struct hv_ring_buffer {
234 /* Offset in bytes from the start of ring data below */
237 /* Offset in bytes from the start of ring data below */
242 /* Pad it to PAGE_SIZE so that data starts on page boundary */
246 * The interrupt_mask field is used only for channels but since our
247 * vmbus connection also uses this data structure and its data starts
248 * here, we commented out this field.
252 * Ring data starts here + RingDataStartOffset
253 * !!! DO NOT place any fields below this !!!
258 struct hv_ring_buffer_info {
259 struct hv_ring_buffer *ring_buffer;
260 u32 ring_size; /* Include the shared header */
261 spinlock_t ring_lock;
263 u32 ring_datasize; /* < ring_size */
264 u32 ring_data_startoffset;
267 struct hv_ring_buffer_debug_info {
268 u32 current_interrupt_mask;
269 u32 current_read_index;
270 u32 current_write_index;
271 u32 bytes_avail_toread;
272 u32 bytes_avail_towrite;
276 * We use the same version numbering for all Hyper-V modules.
278 * Definition of versioning is as follows;
280 * Major Number Changes for these scenarios;
281 * 1. When a new version of Windows Hyper-V
283 * 2. A Major change has occurred in the
285 * (For example the merge for the first time
286 * into the kernel) Every time the Major Number
287 * changes, the Revision number is reset to 0.
288 * Minor Number Changes when new functionality is added
289 * to the Linux IC's that is not a bug fix.
291 * 3.1 - Added completed hv_utils driver. Shutdown/Heartbeat/Timesync
293 #define HV_DRV_VERSION "3.1"
297 * A revision number of vmbus that is used for ensuring both ends on a
298 * partition are using compatible versions.
300 #define VMBUS_REVISION_NUMBER 13
302 /* Make maximum size of pipe payload of 16K */
303 #define MAX_PIPE_DATA_PAYLOAD (sizeof(u8) * 16384)
305 /* Define PipeMode values. */
306 #define VMBUS_PIPE_TYPE_BYTE 0x00000000
307 #define VMBUS_PIPE_TYPE_MESSAGE 0x00000004
309 /* The size of the user defined data buffer for non-pipe offers. */
310 #define MAX_USER_DEFINED_BYTES 120
312 /* The size of the user defined data buffer for pipe offers. */
313 #define MAX_PIPE_USER_DEFINED_BYTES 116
316 * At the center of the Channel Management library is the Channel Offer. This
317 * struct contains the fundamental information about an offer.
319 struct vmbus_channel_offer {
322 u64 int_latency; /* in 100ns units */
324 u32 server_ctx_size; /* in bytes */
326 u16 mmio_megabytes; /* in bytes * 1024 * 1024 */
329 /* Non-pipes: The user has MAX_USER_DEFINED_BYTES bytes. */
331 unsigned char user_def[MAX_USER_DEFINED_BYTES];
336 * The following sructure is an integrated pipe protocol, which
337 * is implemented on top of standard user-defined data. Pipe
338 * clients have MAX_PIPE_USER_DEFINED_BYTES left for their own
343 unsigned char user_def[MAX_PIPE_USER_DEFINED_BYTES];
350 #define VMBUS_CHANNEL_ENUMERATE_DEVICE_INTERFACE 1
351 #define VMBUS_CHANNEL_SERVER_SUPPORTS_TRANSFER_PAGES 2
352 #define VMBUS_CHANNEL_SERVER_SUPPORTS_GPADLS 4
353 #define VMBUS_CHANNEL_NAMED_PIPE_MODE 0x10
354 #define VMBUS_CHANNEL_LOOPBACK_OFFER 0x100
355 #define VMBUS_CHANNEL_PARENT_OFFER 0x200
356 #define VMBUS_CHANNEL_REQUEST_MONITORED_NOTIFICATION 0x400
358 struct vmpacket_descriptor {
366 struct vmpacket_header {
367 u32 prev_pkt_start_offset;
368 struct vmpacket_descriptor descriptor;
371 struct vmtransfer_page_range {
376 struct vmtransfer_page_packet_header {
377 struct vmpacket_descriptor d;
379 bool sender_owns_set;
382 struct vmtransfer_page_range ranges[1];
385 struct vmgpadl_packet_header {
386 struct vmpacket_descriptor d;
391 struct vmadd_remove_transfer_page_set {
392 struct vmpacket_descriptor d;
399 * This structure defines a range in guest physical space that can be made to
400 * look virtually contiguous.
409 * This is the format for an Establish Gpadl packet, which contains a handle by
410 * which this GPADL will be known and a set of GPA ranges associated with it.
411 * This can be converted to a MDL by the guest OS. If there are multiple GPA
412 * ranges, then the resulting MDL will be "chained," representing multiple VA
415 struct vmestablish_gpadl {
416 struct vmpacket_descriptor d;
419 struct gpa_range range[1];
423 * This is the format for a Teardown Gpadl packet, which indicates that the
424 * GPADL handle in the Establish Gpadl packet will never be referenced again.
426 struct vmteardown_gpadl {
427 struct vmpacket_descriptor d;
429 u32 reserved; /* for alignment to a 8-byte boundary */
433 * This is the format for a GPA-Direct packet, which contains a set of GPA
434 * ranges, in addition to commands and/or data.
436 struct vmdata_gpa_direct {
437 struct vmpacket_descriptor d;
440 struct gpa_range range[1];
443 /* This is the format for a Additional Data Packet. */
444 struct vmadditional_data {
445 struct vmpacket_descriptor d;
449 unsigned char data[1];
452 union vmpacket_largest_possible_header {
453 struct vmpacket_descriptor simple_hdr;
454 struct vmtransfer_page_packet_header xfer_page_hdr;
455 struct vmgpadl_packet_header gpadl_hdr;
456 struct vmadd_remove_transfer_page_set add_rm_xfer_page_hdr;
457 struct vmestablish_gpadl establish_gpadl_hdr;
458 struct vmteardown_gpadl teardown_gpadl_hdr;
459 struct vmdata_gpa_direct data_gpa_direct_hdr;
462 #define VMPACKET_DATA_START_ADDRESS(__packet) \
463 (void *)(((unsigned char *)__packet) + \
464 ((struct vmpacket_descriptor)__packet)->offset8 * 8)
466 #define VMPACKET_DATA_LENGTH(__packet) \
467 ((((struct vmpacket_descriptor)__packet)->len8 - \
468 ((struct vmpacket_descriptor)__packet)->offset8) * 8)
470 #define VMPACKET_TRANSFER_MODE(__packet) \
471 (((struct IMPACT)__packet)->type)
473 enum vmbus_packet_type {
474 VM_PKT_INVALID = 0x0,
476 VM_PKT_ADD_XFER_PAGESET = 0x2,
477 VM_PKT_RM_XFER_PAGESET = 0x3,
478 VM_PKT_ESTABLISH_GPADL = 0x4,
479 VM_PKT_TEARDOWN_GPADL = 0x5,
480 VM_PKT_DATA_INBAND = 0x6,
481 VM_PKT_DATA_USING_XFER_PAGES = 0x7,
482 VM_PKT_DATA_USING_GPADL = 0x8,
483 VM_PKT_DATA_USING_GPA_DIRECT = 0x9,
484 VM_PKT_CANCEL_REQUEST = 0xa,
486 VM_PKT_DATA_USING_ADDITIONAL_PKT = 0xc,
487 VM_PKT_ADDITIONAL_DATA = 0xd
490 #define VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED 1
493 /* Version 1 messages */
494 enum vmbus_channel_message_type {
495 CHANNELMSG_INVALID = 0,
496 CHANNELMSG_OFFERCHANNEL = 1,
497 CHANNELMSG_RESCIND_CHANNELOFFER = 2,
498 CHANNELMSG_REQUESTOFFERS = 3,
499 CHANNELMSG_ALLOFFERS_DELIVERED = 4,
500 CHANNELMSG_OPENCHANNEL = 5,
501 CHANNELMSG_OPENCHANNEL_RESULT = 6,
502 CHANNELMSG_CLOSECHANNEL = 7,
503 CHANNELMSG_GPADL_HEADER = 8,
504 CHANNELMSG_GPADL_BODY = 9,
505 CHANNELMSG_GPADL_CREATED = 10,
506 CHANNELMSG_GPADL_TEARDOWN = 11,
507 CHANNELMSG_GPADL_TORNDOWN = 12,
508 CHANNELMSG_RELID_RELEASED = 13,
509 CHANNELMSG_INITIATE_CONTACT = 14,
510 CHANNELMSG_VERSION_RESPONSE = 15,
511 CHANNELMSG_UNLOAD = 16,
512 #ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
513 CHANNELMSG_VIEWRANGE_ADD = 17,
514 CHANNELMSG_VIEWRANGE_REMOVE = 18,
519 struct vmbus_channel_message_header {
520 enum vmbus_channel_message_type msgtype;
524 /* Query VMBus Version parameters */
525 struct vmbus_channel_query_vmbus_version {
526 struct vmbus_channel_message_header header;
530 /* VMBus Version Supported parameters */
531 struct vmbus_channel_version_supported {
532 struct vmbus_channel_message_header header;
533 bool version_supported;
536 /* Offer Channel parameters */
537 struct vmbus_channel_offer_channel {
538 struct vmbus_channel_message_header header;
539 struct vmbus_channel_offer offer;
542 bool monitor_allocated;
545 /* Rescind Offer parameters */
546 struct vmbus_channel_rescind_offer {
547 struct vmbus_channel_message_header header;
552 * Request Offer -- no parameters, SynIC message contains the partition ID
553 * Set Snoop -- no parameters, SynIC message contains the partition ID
554 * Clear Snoop -- no parameters, SynIC message contains the partition ID
555 * All Offers Delivered -- no parameters, SynIC message contains the partition
557 * Flush Client -- no parameters, SynIC message contains the partition ID
560 /* Open Channel parameters */
561 struct vmbus_channel_open_channel {
562 struct vmbus_channel_message_header header;
564 /* Identifies the specific VMBus channel that is being opened. */
567 /* ID making a particular open request at a channel offer unique. */
570 /* GPADL for the channel's ring buffer. */
571 u32 ringbuffer_gpadlhandle;
573 /* GPADL for the channel's server context save area. */
574 u32 server_contextarea_gpadlhandle;
577 * The upstream ring buffer begins at offset zero in the memory
578 * described by RingBufferGpadlHandle. The downstream ring buffer
579 * follows it at this offset (in pages).
581 u32 downstream_ringbuffer_pageoffset;
583 /* User-specific data to be passed along to the server endpoint. */
584 unsigned char userdata[MAX_USER_DEFINED_BYTES];
587 /* Open Channel Result parameters */
588 struct vmbus_channel_open_result {
589 struct vmbus_channel_message_header header;
595 /* Close channel parameters; */
596 struct vmbus_channel_close_channel {
597 struct vmbus_channel_message_header header;
601 /* Channel Message GPADL */
602 #define GPADL_TYPE_RING_BUFFER 1
603 #define GPADL_TYPE_SERVER_SAVE_AREA 2
604 #define GPADL_TYPE_TRANSACTION 8
607 * The number of PFNs in a GPADL message is defined by the number of
608 * pages that would be spanned by ByteCount and ByteOffset. If the
609 * implied number of PFNs won't fit in this packet, there will be a
610 * follow-up packet that contains more.
612 struct vmbus_channel_gpadl_header {
613 struct vmbus_channel_message_header header;
618 struct gpa_range range[0];
621 /* This is the followup packet that contains more PFNs. */
622 struct vmbus_channel_gpadl_body {
623 struct vmbus_channel_message_header header;
629 struct vmbus_channel_gpadl_created {
630 struct vmbus_channel_message_header header;
636 struct vmbus_channel_gpadl_teardown {
637 struct vmbus_channel_message_header header;
642 struct vmbus_channel_gpadl_torndown {
643 struct vmbus_channel_message_header header;
647 #ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
648 struct vmbus_channel_view_range_add {
649 struct vmbus_channel_message_header header;
650 PHYSICAL_ADDRESS viewrange_base;
651 u64 viewrange_length;
655 struct vmbus_channel_view_range_remove {
656 struct vmbus_channel_message_header header;
657 PHYSICAL_ADDRESS viewrange_base;
662 struct vmbus_channel_relid_released {
663 struct vmbus_channel_message_header header;
667 struct vmbus_channel_initiate_contact {
668 struct vmbus_channel_message_header header;
669 u32 vmbus_version_requested;
676 struct vmbus_channel_version_response {
677 struct vmbus_channel_message_header header;
678 bool version_supported;
681 enum vmbus_channel_state {
683 CHANNEL_OPENING_STATE,
687 struct vmbus_channel_debug_info {
689 enum vmbus_channel_state state;
690 uuid_le interfacetype;
691 uuid_le interface_instance;
693 u32 servermonitor_pending;
694 u32 servermonitor_latency;
695 u32 servermonitor_connectionid;
696 u32 clientmonitor_pending;
697 u32 clientmonitor_latency;
698 u32 clientmonitor_connectionid;
700 struct hv_ring_buffer_debug_info inbound;
701 struct hv_ring_buffer_debug_info outbound;
705 * Represents each channel msg on the vmbus connection This is a
706 * variable-size data structure depending on the msg type itself
708 struct vmbus_channel_msginfo {
709 /* Bookkeeping stuff */
710 struct list_head msglistentry;
712 /* So far, this is only used to handle gpadl body message */
713 struct list_head submsglist;
715 /* Synchronize the request/response if needed */
716 struct completion waitevent;
718 struct vmbus_channel_version_supported version_supported;
719 struct vmbus_channel_open_result open_result;
720 struct vmbus_channel_gpadl_torndown gpadl_torndown;
721 struct vmbus_channel_gpadl_created gpadl_created;
722 struct vmbus_channel_version_response version_response;
727 * The channel message that goes out on the "wire".
728 * It will contain at minimum the VMBUS_CHANNEL_MESSAGE_HEADER header
730 unsigned char msg[0];
733 struct vmbus_close_msg {
734 struct vmbus_channel_msginfo info;
735 struct vmbus_channel_close_channel msg;
738 struct vmbus_channel {
739 struct list_head listentry;
741 struct hv_device *device_obj;
743 struct work_struct work;
745 enum vmbus_channel_state state;
747 struct vmbus_channel_offer_channel offermsg;
749 * These are based on the OfferMsg.MonitorId.
750 * Save it here for easy access.
755 u32 ringbuffer_gpadlhandle;
757 /* Allocated memory for ring buffer */
758 void *ringbuffer_pages;
759 u32 ringbuffer_pagecount;
760 struct hv_ring_buffer_info outbound; /* send to parent */
761 struct hv_ring_buffer_info inbound; /* receive from parent */
762 spinlock_t inbound_lock;
763 struct workqueue_struct *controlwq;
765 struct vmbus_close_msg close_msg;
767 /* Channel callback are invoked in this workqueue context */
768 /* HANDLE dataWorkQueue; */
770 void (*onchannel_callback)(void *context);
771 void *channel_callback_context;
774 void vmbus_onmessage(void *context);
776 int vmbus_request_offers(void);
778 /* The format must be the same as struct vmdata_gpa_direct */
779 struct vmbus_channel_packet_page_buffer {
787 struct hv_page_buffer range[MAX_PAGE_BUFFER_COUNT];
790 /* The format must be the same as struct vmdata_gpa_direct */
791 struct vmbus_channel_packet_multipage_buffer {
798 u32 rangecount; /* Always 1 in this case */
799 struct hv_multipage_buffer range;
803 extern int vmbus_open(struct vmbus_channel *channel,
804 u32 send_ringbuffersize,
805 u32 recv_ringbuffersize,
808 void(*onchannel_callback)(void *context),
811 extern void vmbus_close(struct vmbus_channel *channel);
813 extern int vmbus_sendpacket(struct vmbus_channel *channel,
817 enum vmbus_packet_type type,
820 extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
821 struct hv_page_buffer pagebuffers[],
827 extern int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel,
828 struct hv_multipage_buffer *mpb,
833 extern int vmbus_establish_gpadl(struct vmbus_channel *channel,
838 extern int vmbus_teardown_gpadl(struct vmbus_channel *channel,
841 extern int vmbus_recvpacket(struct vmbus_channel *channel,
844 u32 *buffer_actual_len,
847 extern int vmbus_recvpacket_raw(struct vmbus_channel *channel,
850 u32 *buffer_actual_len,
854 extern void vmbus_get_debug_info(struct vmbus_channel *channel,
855 struct vmbus_channel_debug_info *debug);
857 extern void vmbus_ontimer(unsigned long data);
859 struct hv_dev_port_info {
863 u32 bytes_avail_toread;
864 u32 bytes_avail_towrite;
867 /* Base driver object */
871 /* the device type supported by this driver */
873 const struct hv_vmbus_device_id *id_table;
875 struct device_driver driver;
877 int (*probe)(struct hv_device *, const struct hv_vmbus_device_id *);
878 int (*remove)(struct hv_device *);
879 void (*shutdown)(struct hv_device *);
883 /* Base device object */
885 /* the device type id of this device */
888 /* the device instance id of this device */
889 uuid_le dev_instance;
891 struct device device;
893 struct vmbus_channel *channel;
897 static inline struct hv_device *device_to_hv_device(struct device *d)
899 return container_of(d, struct hv_device, device);
902 static inline struct hv_driver *drv_to_hv_drv(struct device_driver *d)
904 return container_of(d, struct hv_driver, driver);
907 static inline void hv_set_drvdata(struct hv_device *dev, void *data)
909 dev_set_drvdata(&dev->device, data);
912 static inline void *hv_get_drvdata(struct hv_device *dev)
914 return dev_get_drvdata(&dev->device);
917 /* Vmbus interface */
918 #define vmbus_driver_register(driver) \
919 __vmbus_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
920 int __must_check __vmbus_driver_register(struct hv_driver *hv_driver,
921 struct module *owner,
922 const char *mod_name);
923 void vmbus_driver_unregister(struct hv_driver *hv_driver);
926 * VMBUS_DEVICE - macro used to describe a specific hyperv vmbus device
928 * This macro is used to create a struct hv_vmbus_device_id that matches a
931 #define VMBUS_DEVICE(g0, g1, g2, g3, g4, g5, g6, g7, \
932 g8, g9, ga, gb, gc, gd, ge, gf) \
933 .guid = { g0, g1, g2, g3, g4, g5, g6, g7, \
934 g8, g9, ga, gb, gc, gd, ge, gf },
937 * Common header for Hyper-V ICs
940 #define ICMSGTYPE_NEGOTIATE 0
941 #define ICMSGTYPE_HEARTBEAT 1
942 #define ICMSGTYPE_KVPEXCHANGE 2
943 #define ICMSGTYPE_SHUTDOWN 3
944 #define ICMSGTYPE_TIMESYNC 4
945 #define ICMSGTYPE_VSS 5
947 #define ICMSGHDRFLAG_TRANSACTION 1
948 #define ICMSGHDRFLAG_REQUEST 2
949 #define ICMSGHDRFLAG_RESPONSE 4
951 #define HV_S_OK 0x00000000
952 #define HV_E_FAIL 0x80004005
953 #define HV_ERROR_NOT_SUPPORTED 0x80070032
954 #define HV_ERROR_MACHINE_LOCKED 0x800704F7
957 * While we want to handle util services as regular devices,
958 * there is only one instance of each of these services; so
959 * we statically allocate the service specific state.
962 struct hv_util_service {
964 void (*util_cb)(void *);
965 int (*util_init)(struct hv_util_service *);
966 void (*util_deinit)(void);
969 struct vmbuspipe_hdr {
980 struct ic_version icverframe;
982 struct ic_version icvermsg;
990 struct icmsg_negotiate {
994 struct ic_version icversion_data[1]; /* any size array */
997 struct shutdown_msg_data {
1001 u8 display_message[2048];
1004 struct heartbeat_msg_data {
1009 /* Time Sync IC defs */
1010 #define ICTIMESYNCFLAG_PROBE 0
1011 #define ICTIMESYNCFLAG_SYNC 1
1012 #define ICTIMESYNCFLAG_SAMPLE 2
1015 #define WLTIMEDELTA 116444736000000000L /* in 100ns unit */
1017 #define WLTIMEDELTA 116444736000000000LL
1020 struct ictimesync_data {
1027 struct hyperv_service_callback {
1031 struct vmbus_channel *channel;
1032 void (*callback) (void *context);
1035 extern void vmbus_prep_negotiate_resp(struct icmsg_hdr *,
1036 struct icmsg_negotiate *, u8 *);
1038 int hv_kvp_init(struct hv_util_service *);
1039 void hv_kvp_deinit(void);
1040 void hv_kvp_onchannelcallback(void *);
1042 #endif /* __KERNEL__ */
1043 #endif /* _HYPERV_H */