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.
28 #include <uapi/linux/hyperv.h>
30 #include <linux/types.h>
31 #include <linux/scatterlist.h>
32 #include <linux/list.h>
33 #include <linux/timer.h>
34 #include <linux/workqueue.h>
35 #include <linux/completion.h>
36 #include <linux/device.h>
37 #include <linux/mod_devicetable.h>
40 #define MAX_PAGE_BUFFER_COUNT 32
41 #define MAX_MULTIPAGE_BUFFER_COUNT 32 /* 128K */
45 /* Single-page buffer */
46 struct hv_page_buffer {
52 /* Multiple-page buffer */
53 struct hv_multipage_buffer {
54 /* Length and Offset determines the # of pfns in the array */
57 u64 pfn_array[MAX_MULTIPAGE_BUFFER_COUNT];
61 * Multiple-page buffer array; the pfn array is variable size:
62 * The number of entries in the PFN array is determined by
66 /* Length and Offset determines the # of pfns in the array */
72 /* 0x18 includes the proprietary packet header */
73 #define MAX_PAGE_BUFFER_PACKET (0x18 + \
74 (sizeof(struct hv_page_buffer) * \
75 MAX_PAGE_BUFFER_COUNT))
76 #define MAX_MULTIPAGE_BUFFER_PACKET (0x18 + \
77 sizeof(struct hv_multipage_buffer))
82 struct hv_ring_buffer {
83 /* Offset in bytes from the start of ring data below */
86 /* Offset in bytes from the start of ring data below */
92 * Win8 uses some of the reserved bits to implement
93 * interrupt driven flow management. On the send side
94 * we can request that the receiver interrupt the sender
95 * when the ring transitions from being full to being able
96 * to handle a message of size "pending_send_sz".
98 * Add necessary state for this enhancement.
106 u32 feat_pending_send_sz:1;
111 /* Pad it to PAGE_SIZE so that data starts on page boundary */
115 * Ring data starts here + RingDataStartOffset
116 * !!! DO NOT place any fields below this !!!
121 struct hv_ring_buffer_info {
122 struct hv_ring_buffer *ring_buffer;
123 u32 ring_size; /* Include the shared header */
124 spinlock_t ring_lock;
126 u32 ring_datasize; /* < ring_size */
127 u32 ring_data_startoffset;
132 * hv_get_ringbuffer_availbytes()
134 * Get number of bytes available to read and to write to
135 * for the specified ring buffer
138 hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi,
139 u32 *read, u32 *write)
141 u32 read_loc, write_loc, dsize;
143 smp_read_barrier_depends();
145 /* Capture the read/write indices before they changed */
146 read_loc = rbi->ring_buffer->read_index;
147 write_loc = rbi->ring_buffer->write_index;
148 dsize = rbi->ring_datasize;
150 *write = write_loc >= read_loc ? dsize - (write_loc - read_loc) :
151 read_loc - write_loc;
152 *read = dsize - *write;
156 * VMBUS version is 32 bit entity broken up into
157 * two 16 bit quantities: major_number. minor_number.
159 * 0 . 13 (Windows Server 2008)
162 * 3 . 0 (Windows 8 R2)
165 #define VERSION_WS2008 ((0 << 16) | (13))
166 #define VERSION_WIN7 ((1 << 16) | (1))
167 #define VERSION_WIN8 ((2 << 16) | (4))
168 #define VERSION_WIN8_1 ((3 << 16) | (0))
170 #define VERSION_INVAL -1
172 #define VERSION_CURRENT VERSION_WIN8_1
174 /* Make maximum size of pipe payload of 16K */
175 #define MAX_PIPE_DATA_PAYLOAD (sizeof(u8) * 16384)
177 /* Define PipeMode values. */
178 #define VMBUS_PIPE_TYPE_BYTE 0x00000000
179 #define VMBUS_PIPE_TYPE_MESSAGE 0x00000004
181 /* The size of the user defined data buffer for non-pipe offers. */
182 #define MAX_USER_DEFINED_BYTES 120
184 /* The size of the user defined data buffer for pipe offers. */
185 #define MAX_PIPE_USER_DEFINED_BYTES 116
188 * At the center of the Channel Management library is the Channel Offer. This
189 * struct contains the fundamental information about an offer.
191 struct vmbus_channel_offer {
196 * These two fields are not currently used.
202 u16 mmio_megabytes; /* in bytes * 1024 * 1024 */
205 /* Non-pipes: The user has MAX_USER_DEFINED_BYTES bytes. */
207 unsigned char user_def[MAX_USER_DEFINED_BYTES];
212 * The following sructure is an integrated pipe protocol, which
213 * is implemented on top of standard user-defined data. Pipe
214 * clients have MAX_PIPE_USER_DEFINED_BYTES left for their own
219 unsigned char user_def[MAX_PIPE_USER_DEFINED_BYTES];
223 * The sub_channel_index is defined in win8.
225 u16 sub_channel_index;
230 #define VMBUS_CHANNEL_ENUMERATE_DEVICE_INTERFACE 1
231 #define VMBUS_CHANNEL_SERVER_SUPPORTS_TRANSFER_PAGES 2
232 #define VMBUS_CHANNEL_SERVER_SUPPORTS_GPADLS 4
233 #define VMBUS_CHANNEL_NAMED_PIPE_MODE 0x10
234 #define VMBUS_CHANNEL_LOOPBACK_OFFER 0x100
235 #define VMBUS_CHANNEL_PARENT_OFFER 0x200
236 #define VMBUS_CHANNEL_REQUEST_MONITORED_NOTIFICATION 0x400
238 struct vmpacket_descriptor {
246 struct vmpacket_header {
247 u32 prev_pkt_start_offset;
248 struct vmpacket_descriptor descriptor;
251 struct vmtransfer_page_range {
256 struct vmtransfer_page_packet_header {
257 struct vmpacket_descriptor d;
262 struct vmtransfer_page_range ranges[1];
265 struct vmgpadl_packet_header {
266 struct vmpacket_descriptor d;
271 struct vmadd_remove_transfer_page_set {
272 struct vmpacket_descriptor d;
279 * This structure defines a range in guest physical space that can be made to
280 * look virtually contiguous.
289 * This is the format for an Establish Gpadl packet, which contains a handle by
290 * which this GPADL will be known and a set of GPA ranges associated with it.
291 * This can be converted to a MDL by the guest OS. If there are multiple GPA
292 * ranges, then the resulting MDL will be "chained," representing multiple VA
295 struct vmestablish_gpadl {
296 struct vmpacket_descriptor d;
299 struct gpa_range range[1];
303 * This is the format for a Teardown Gpadl packet, which indicates that the
304 * GPADL handle in the Establish Gpadl packet will never be referenced again.
306 struct vmteardown_gpadl {
307 struct vmpacket_descriptor d;
309 u32 reserved; /* for alignment to a 8-byte boundary */
313 * This is the format for a GPA-Direct packet, which contains a set of GPA
314 * ranges, in addition to commands and/or data.
316 struct vmdata_gpa_direct {
317 struct vmpacket_descriptor d;
320 struct gpa_range range[1];
323 /* This is the format for a Additional Data Packet. */
324 struct vmadditional_data {
325 struct vmpacket_descriptor d;
329 unsigned char data[1];
332 union vmpacket_largest_possible_header {
333 struct vmpacket_descriptor simple_hdr;
334 struct vmtransfer_page_packet_header xfer_page_hdr;
335 struct vmgpadl_packet_header gpadl_hdr;
336 struct vmadd_remove_transfer_page_set add_rm_xfer_page_hdr;
337 struct vmestablish_gpadl establish_gpadl_hdr;
338 struct vmteardown_gpadl teardown_gpadl_hdr;
339 struct vmdata_gpa_direct data_gpa_direct_hdr;
342 #define VMPACKET_DATA_START_ADDRESS(__packet) \
343 (void *)(((unsigned char *)__packet) + \
344 ((struct vmpacket_descriptor)__packet)->offset8 * 8)
346 #define VMPACKET_DATA_LENGTH(__packet) \
347 ((((struct vmpacket_descriptor)__packet)->len8 - \
348 ((struct vmpacket_descriptor)__packet)->offset8) * 8)
350 #define VMPACKET_TRANSFER_MODE(__packet) \
351 (((struct IMPACT)__packet)->type)
353 enum vmbus_packet_type {
354 VM_PKT_INVALID = 0x0,
356 VM_PKT_ADD_XFER_PAGESET = 0x2,
357 VM_PKT_RM_XFER_PAGESET = 0x3,
358 VM_PKT_ESTABLISH_GPADL = 0x4,
359 VM_PKT_TEARDOWN_GPADL = 0x5,
360 VM_PKT_DATA_INBAND = 0x6,
361 VM_PKT_DATA_USING_XFER_PAGES = 0x7,
362 VM_PKT_DATA_USING_GPADL = 0x8,
363 VM_PKT_DATA_USING_GPA_DIRECT = 0x9,
364 VM_PKT_CANCEL_REQUEST = 0xa,
366 VM_PKT_DATA_USING_ADDITIONAL_PKT = 0xc,
367 VM_PKT_ADDITIONAL_DATA = 0xd
370 #define VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED 1
373 /* Version 1 messages */
374 enum vmbus_channel_message_type {
375 CHANNELMSG_INVALID = 0,
376 CHANNELMSG_OFFERCHANNEL = 1,
377 CHANNELMSG_RESCIND_CHANNELOFFER = 2,
378 CHANNELMSG_REQUESTOFFERS = 3,
379 CHANNELMSG_ALLOFFERS_DELIVERED = 4,
380 CHANNELMSG_OPENCHANNEL = 5,
381 CHANNELMSG_OPENCHANNEL_RESULT = 6,
382 CHANNELMSG_CLOSECHANNEL = 7,
383 CHANNELMSG_GPADL_HEADER = 8,
384 CHANNELMSG_GPADL_BODY = 9,
385 CHANNELMSG_GPADL_CREATED = 10,
386 CHANNELMSG_GPADL_TEARDOWN = 11,
387 CHANNELMSG_GPADL_TORNDOWN = 12,
388 CHANNELMSG_RELID_RELEASED = 13,
389 CHANNELMSG_INITIATE_CONTACT = 14,
390 CHANNELMSG_VERSION_RESPONSE = 15,
391 CHANNELMSG_UNLOAD = 16,
392 #ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
393 CHANNELMSG_VIEWRANGE_ADD = 17,
394 CHANNELMSG_VIEWRANGE_REMOVE = 18,
399 struct vmbus_channel_message_header {
400 enum vmbus_channel_message_type msgtype;
404 /* Query VMBus Version parameters */
405 struct vmbus_channel_query_vmbus_version {
406 struct vmbus_channel_message_header header;
410 /* VMBus Version Supported parameters */
411 struct vmbus_channel_version_supported {
412 struct vmbus_channel_message_header header;
413 u8 version_supported;
416 /* Offer Channel parameters */
417 struct vmbus_channel_offer_channel {
418 struct vmbus_channel_message_header header;
419 struct vmbus_channel_offer offer;
423 * win7 and beyond splits this field into a bit field.
425 u8 monitor_allocated:1;
428 * These are new fields added in win7 and later.
429 * Do not access these fields without checking the
430 * negotiated protocol.
432 * If "is_dedicated_interrupt" is set, we must not set the
433 * associated bit in the channel bitmap while sending the
434 * interrupt to the host.
436 * connection_id is to be used in signaling the host.
438 u16 is_dedicated_interrupt:1;
443 /* Rescind Offer parameters */
444 struct vmbus_channel_rescind_offer {
445 struct vmbus_channel_message_header header;
450 * Request Offer -- no parameters, SynIC message contains the partition ID
451 * Set Snoop -- no parameters, SynIC message contains the partition ID
452 * Clear Snoop -- no parameters, SynIC message contains the partition ID
453 * All Offers Delivered -- no parameters, SynIC message contains the partition
455 * Flush Client -- no parameters, SynIC message contains the partition ID
458 /* Open Channel parameters */
459 struct vmbus_channel_open_channel {
460 struct vmbus_channel_message_header header;
462 /* Identifies the specific VMBus channel that is being opened. */
465 /* ID making a particular open request at a channel offer unique. */
468 /* GPADL for the channel's ring buffer. */
469 u32 ringbuffer_gpadlhandle;
472 * Starting with win8, this field will be used to specify
473 * the target virtual processor on which to deliver the interrupt for
474 * the host to guest communication.
475 * Prior to win8, incoming channel interrupts would only
476 * be delivered on cpu 0. Setting this value to 0 would
477 * preserve the earlier behavior.
482 * The upstream ring buffer begins at offset zero in the memory
483 * described by RingBufferGpadlHandle. The downstream ring buffer
484 * follows it at this offset (in pages).
486 u32 downstream_ringbuffer_pageoffset;
488 /* User-specific data to be passed along to the server endpoint. */
489 unsigned char userdata[MAX_USER_DEFINED_BYTES];
492 /* Open Channel Result parameters */
493 struct vmbus_channel_open_result {
494 struct vmbus_channel_message_header header;
500 /* Close channel parameters; */
501 struct vmbus_channel_close_channel {
502 struct vmbus_channel_message_header header;
506 /* Channel Message GPADL */
507 #define GPADL_TYPE_RING_BUFFER 1
508 #define GPADL_TYPE_SERVER_SAVE_AREA 2
509 #define GPADL_TYPE_TRANSACTION 8
512 * The number of PFNs in a GPADL message is defined by the number of
513 * pages that would be spanned by ByteCount and ByteOffset. If the
514 * implied number of PFNs won't fit in this packet, there will be a
515 * follow-up packet that contains more.
517 struct vmbus_channel_gpadl_header {
518 struct vmbus_channel_message_header header;
523 struct gpa_range range[0];
526 /* This is the followup packet that contains more PFNs. */
527 struct vmbus_channel_gpadl_body {
528 struct vmbus_channel_message_header header;
534 struct vmbus_channel_gpadl_created {
535 struct vmbus_channel_message_header header;
541 struct vmbus_channel_gpadl_teardown {
542 struct vmbus_channel_message_header header;
547 struct vmbus_channel_gpadl_torndown {
548 struct vmbus_channel_message_header header;
552 #ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
553 struct vmbus_channel_view_range_add {
554 struct vmbus_channel_message_header header;
555 PHYSICAL_ADDRESS viewrange_base;
556 u64 viewrange_length;
560 struct vmbus_channel_view_range_remove {
561 struct vmbus_channel_message_header header;
562 PHYSICAL_ADDRESS viewrange_base;
567 struct vmbus_channel_relid_released {
568 struct vmbus_channel_message_header header;
572 struct vmbus_channel_initiate_contact {
573 struct vmbus_channel_message_header header;
574 u32 vmbus_version_requested;
575 u32 target_vcpu; /* The VCPU the host should respond to */
581 struct vmbus_channel_version_response {
582 struct vmbus_channel_message_header header;
583 u8 version_supported;
586 enum vmbus_channel_state {
588 CHANNEL_OPENING_STATE,
590 CHANNEL_OPENED_STATE,
594 * Represents each channel msg on the vmbus connection This is a
595 * variable-size data structure depending on the msg type itself
597 struct vmbus_channel_msginfo {
598 /* Bookkeeping stuff */
599 struct list_head msglistentry;
601 /* So far, this is only used to handle gpadl body message */
602 struct list_head submsglist;
604 /* Synchronize the request/response if needed */
605 struct completion waitevent;
607 struct vmbus_channel_version_supported version_supported;
608 struct vmbus_channel_open_result open_result;
609 struct vmbus_channel_gpadl_torndown gpadl_torndown;
610 struct vmbus_channel_gpadl_created gpadl_created;
611 struct vmbus_channel_version_response version_response;
616 * The channel message that goes out on the "wire".
617 * It will contain at minimum the VMBUS_CHANNEL_MESSAGE_HEADER header
619 unsigned char msg[0];
622 struct vmbus_close_msg {
623 struct vmbus_channel_msginfo info;
624 struct vmbus_channel_close_channel msg;
627 /* Define connection identifier type. */
628 union hv_connection_id {
636 /* Definition of the hv_signal_event hypercall input structure. */
637 struct hv_input_signal_event {
638 union hv_connection_id connectionid;
643 struct hv_input_signal_event_buffer {
645 struct hv_input_signal_event event;
648 struct vmbus_channel {
649 /* Unique channel id */
652 struct list_head listentry;
654 struct hv_device *device_obj;
656 enum vmbus_channel_state state;
658 struct vmbus_channel_offer_channel offermsg;
660 * These are based on the OfferMsg.MonitorId.
661 * Save it here for easy access.
666 bool rescind; /* got rescind msg */
668 u32 ringbuffer_gpadlhandle;
670 /* Allocated memory for ring buffer */
671 void *ringbuffer_pages;
672 u32 ringbuffer_pagecount;
673 struct hv_ring_buffer_info outbound; /* send to parent */
674 struct hv_ring_buffer_info inbound; /* receive from parent */
675 spinlock_t inbound_lock;
677 struct vmbus_close_msg close_msg;
679 /* Channel callback are invoked in this workqueue context */
680 /* HANDLE dataWorkQueue; */
682 void (*onchannel_callback)(void *context);
683 void *channel_callback_context;
686 * A channel can be marked for efficient (batched)
688 * If batched_reading is set to "true", we read until the
689 * channel is empty and hold off interrupts from the host
690 * during the entire read process.
691 * If batched_reading is set to "false", the client is not
692 * going to perform batched reading.
694 * By default we will enable batched reading; specific
695 * drivers that don't want this behavior can turn it off.
698 bool batched_reading;
700 bool is_dedicated_interrupt;
701 struct hv_input_signal_event_buffer sig_buf;
702 struct hv_input_signal_event *sig_event;
705 * Starting with win8, this field will be used to specify
706 * the target virtual processor on which to deliver the interrupt for
707 * the host to guest communication.
708 * Prior to win8, incoming channel interrupts would only
709 * be delivered on cpu 0. Setting this value to 0 would
710 * preserve the earlier behavior.
713 /* The corresponding CPUID in the guest */
716 * Support for sub-channels. For high performance devices,
717 * it will be useful to have multiple sub-channels to support
718 * a scalable communication infrastructure with the host.
719 * The support for sub-channels is implemented as an extention
720 * to the current infrastructure.
721 * The initial offer is considered the primary channel and this
722 * offer message will indicate if the host supports sub-channels.
723 * The guest is free to ask for sub-channels to be offerred and can
724 * open these sub-channels as a normal "primary" channel. However,
725 * all sub-channels will have the same type and instance guids as the
726 * primary channel. Requests sent on a given channel will result in a
727 * response on the same channel.
731 * Sub-channel creation callback. This callback will be called in
732 * process context when a sub-channel offer is received from the host.
733 * The guest can open the sub-channel in the context of this callback.
735 void (*sc_creation_callback)(struct vmbus_channel *new_sc);
738 * The spinlock to protect the structure. It is being used to protect
739 * test-and-set access to various attributes of the structure as well
740 * as all sc_list operations.
744 * All Sub-channels of a primary channel are linked here.
746 struct list_head sc_list;
748 * The primary channel this sub-channel belongs to.
749 * This will be NULL for the primary channel.
751 struct vmbus_channel *primary_channel;
753 * Support per-channel state for use by vmbus drivers.
755 void *per_channel_state;
757 * To support per-cpu lookup mapping of relid to channel,
758 * link up channels based on their CPU affinity.
760 struct list_head percpu_list;
766 static inline void set_channel_read_state(struct vmbus_channel *c, bool state)
768 c->batched_reading = state;
771 static inline void set_per_channel_state(struct vmbus_channel *c, void *s)
773 c->per_channel_state = s;
776 static inline void *get_per_channel_state(struct vmbus_channel *c)
778 return c->per_channel_state;
781 void vmbus_onmessage(void *context);
783 int vmbus_request_offers(void);
786 * APIs for managing sub-channels.
789 void vmbus_set_sc_create_callback(struct vmbus_channel *primary_channel,
790 void (*sc_cr_cb)(struct vmbus_channel *new_sc));
793 * Retrieve the (sub) channel on which to send an outgoing request.
794 * When a primary channel has multiple sub-channels, we choose a
795 * channel whose VCPU binding is closest to the VCPU on which
796 * this call is being made.
798 struct vmbus_channel *vmbus_get_outgoing_channel(struct vmbus_channel *primary);
801 * Check if sub-channels have already been offerred. This API will be useful
802 * when the driver is unloaded after establishing sub-channels. In this case,
803 * when the driver is re-loaded, the driver would have to check if the
804 * subchannels have already been established before attempting to request
805 * the creation of sub-channels.
806 * This function returns TRUE to indicate that subchannels have already been
808 * This function should be invoked after setting the callback function for
809 * sub-channel creation.
811 bool vmbus_are_subchannels_present(struct vmbus_channel *primary);
813 /* The format must be the same as struct vmdata_gpa_direct */
814 struct vmbus_channel_packet_page_buffer {
822 struct hv_page_buffer range[MAX_PAGE_BUFFER_COUNT];
825 /* The format must be the same as struct vmdata_gpa_direct */
826 struct vmbus_channel_packet_multipage_buffer {
833 u32 rangecount; /* Always 1 in this case */
834 struct hv_multipage_buffer range;
837 /* The format must be the same as struct vmdata_gpa_direct */
838 struct vmbus_packet_mpb_array {
845 u32 rangecount; /* Always 1 in this case */
846 struct hv_mpb_array range;
850 extern int vmbus_open(struct vmbus_channel *channel,
851 u32 send_ringbuffersize,
852 u32 recv_ringbuffersize,
855 void(*onchannel_callback)(void *context),
858 extern void vmbus_close(struct vmbus_channel *channel);
860 extern int vmbus_sendpacket(struct vmbus_channel *channel,
864 enum vmbus_packet_type type,
867 extern int vmbus_sendpacket_ctl(struct vmbus_channel *channel,
871 enum vmbus_packet_type type,
875 extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
876 struct hv_page_buffer pagebuffers[],
882 extern int vmbus_sendpacket_pagebuffer_ctl(struct vmbus_channel *channel,
883 struct hv_page_buffer pagebuffers[],
891 extern int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel,
892 struct hv_multipage_buffer *mpb,
897 extern int vmbus_sendpacket_mpb_desc(struct vmbus_channel *channel,
898 struct vmbus_packet_mpb_array *mpb,
904 extern int vmbus_establish_gpadl(struct vmbus_channel *channel,
909 extern int vmbus_teardown_gpadl(struct vmbus_channel *channel,
912 extern int vmbus_recvpacket(struct vmbus_channel *channel,
915 u32 *buffer_actual_len,
918 extern int vmbus_recvpacket_raw(struct vmbus_channel *channel,
921 u32 *buffer_actual_len,
925 extern void vmbus_ontimer(unsigned long data);
927 /* Base driver object */
931 /* the device type supported by this driver */
933 const struct hv_vmbus_device_id *id_table;
935 struct device_driver driver;
937 int (*probe)(struct hv_device *, const struct hv_vmbus_device_id *);
938 int (*remove)(struct hv_device *);
939 void (*shutdown)(struct hv_device *);
943 /* Base device object */
945 /* the device type id of this device */
948 /* the device instance id of this device */
949 uuid_le dev_instance;
951 struct device device;
953 struct vmbus_channel *channel;
957 static inline struct hv_device *device_to_hv_device(struct device *d)
959 return container_of(d, struct hv_device, device);
962 static inline struct hv_driver *drv_to_hv_drv(struct device_driver *d)
964 return container_of(d, struct hv_driver, driver);
967 static inline void hv_set_drvdata(struct hv_device *dev, void *data)
969 dev_set_drvdata(&dev->device, data);
972 static inline void *hv_get_drvdata(struct hv_device *dev)
974 return dev_get_drvdata(&dev->device);
977 /* Vmbus interface */
978 #define vmbus_driver_register(driver) \
979 __vmbus_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
980 int __must_check __vmbus_driver_register(struct hv_driver *hv_driver,
981 struct module *owner,
982 const char *mod_name);
983 void vmbus_driver_unregister(struct hv_driver *hv_driver);
986 * VMBUS_DEVICE - macro used to describe a specific hyperv vmbus device
988 * This macro is used to create a struct hv_vmbus_device_id that matches a
991 #define VMBUS_DEVICE(g0, g1, g2, g3, g4, g5, g6, g7, \
992 g8, g9, ga, gb, gc, gd, ge, gf) \
993 .guid = { g0, g1, g2, g3, g4, g5, g6, g7, \
994 g8, g9, ga, gb, gc, gd, ge, gf },
997 * GUID definitions of various offer types - services offered to the guest.
1002 * {f8615163-df3e-46c5-913f-f2d2f965ed0e}
1004 #define HV_NIC_GUID \
1006 0x63, 0x51, 0x61, 0xf8, 0x3e, 0xdf, 0xc5, 0x46, \
1007 0x91, 0x3f, 0xf2, 0xd2, 0xf9, 0x65, 0xed, 0x0e \
1012 * {32412632-86cb-44a2-9b5c-50d1417354f5}
1014 #define HV_IDE_GUID \
1016 0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, \
1017 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5 \
1022 * {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f}
1024 #define HV_SCSI_GUID \
1026 0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, \
1027 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f \
1032 * {0e0b6031-5213-4934-818b-38d90ced39db}
1034 #define HV_SHUTDOWN_GUID \
1036 0x31, 0x60, 0x0b, 0x0e, 0x13, 0x52, 0x34, 0x49, \
1037 0x81, 0x8b, 0x38, 0xd9, 0x0c, 0xed, 0x39, 0xdb \
1042 * {9527E630-D0AE-497b-ADCE-E80AB0175CAF}
1044 #define HV_TS_GUID \
1046 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49, \
1047 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf \
1052 * {57164f39-9115-4e78-ab55-382f3bd5422d}
1054 #define HV_HEART_BEAT_GUID \
1056 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e, \
1057 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d \
1062 * {a9a0f4e7-5a45-4d96-b827-8a841e8c03e6}
1064 #define HV_KVP_GUID \
1066 0xe7, 0xf4, 0xa0, 0xa9, 0x45, 0x5a, 0x96, 0x4d, \
1067 0xb8, 0x27, 0x8a, 0x84, 0x1e, 0x8c, 0x3, 0xe6 \
1071 * Dynamic memory GUID
1072 * {525074dc-8985-46e2-8057-a307dc18a502}
1074 #define HV_DM_GUID \
1076 0xdc, 0x74, 0x50, 0X52, 0x85, 0x89, 0xe2, 0x46, \
1077 0x80, 0x57, 0xa3, 0x07, 0xdc, 0x18, 0xa5, 0x02 \
1082 * {cfa8b69e-5b4a-4cc0-b98b-8ba1a1f3f95a}
1084 #define HV_MOUSE_GUID \
1086 0x9e, 0xb6, 0xa8, 0xcf, 0x4a, 0x5b, 0xc0, 0x4c, \
1087 0xb9, 0x8b, 0x8b, 0xa1, 0xa1, 0xf3, 0xf9, 0x5a \
1091 * VSS (Backup/Restore) GUID
1093 #define HV_VSS_GUID \
1095 0x29, 0x2e, 0xfa, 0x35, 0x23, 0xea, 0x36, 0x42, \
1096 0x96, 0xae, 0x3a, 0x6e, 0xba, 0xcb, 0xa4, 0x40 \
1099 * Synthetic Video GUID
1100 * {DA0A7802-E377-4aac-8E77-0558EB1073F8}
1102 #define HV_SYNTHVID_GUID \
1104 0x02, 0x78, 0x0a, 0xda, 0x77, 0xe3, 0xac, 0x4a, \
1105 0x8e, 0x77, 0x05, 0x58, 0xeb, 0x10, 0x73, 0xf8 \
1110 * {2f9bcc4a-0069-4af3-b76b-6fd0be528cda}
1112 #define HV_SYNTHFC_GUID \
1114 0x4A, 0xCC, 0x9B, 0x2F, 0x69, 0x00, 0xF3, 0x4A, \
1115 0xB7, 0x6B, 0x6F, 0xD0, 0xBE, 0x52, 0x8C, 0xDA \
1119 * Guest File Copy Service
1120 * {34D14BE3-DEE4-41c8-9AE7-6B174977C192}
1123 #define HV_FCOPY_GUID \
1125 0xE3, 0x4B, 0xD1, 0x34, 0xE4, 0xDE, 0xC8, 0x41, \
1126 0x9A, 0xE7, 0x6B, 0x17, 0x49, 0x77, 0xC1, 0x92 \
1130 * NetworkDirect. This is the guest RDMA service.
1131 * {8c2eaf3d-32a7-4b09-ab99-bd1f1c86b501}
1133 #define HV_ND_GUID \
1135 0x3d, 0xaf, 0x2e, 0x8c, 0xa7, 0x32, 0x09, 0x4b, \
1136 0xab, 0x99, 0xbd, 0x1f, 0x1c, 0x86, 0xb5, 0x01 \
1140 * Common header for Hyper-V ICs
1143 #define ICMSGTYPE_NEGOTIATE 0
1144 #define ICMSGTYPE_HEARTBEAT 1
1145 #define ICMSGTYPE_KVPEXCHANGE 2
1146 #define ICMSGTYPE_SHUTDOWN 3
1147 #define ICMSGTYPE_TIMESYNC 4
1148 #define ICMSGTYPE_VSS 5
1150 #define ICMSGHDRFLAG_TRANSACTION 1
1151 #define ICMSGHDRFLAG_REQUEST 2
1152 #define ICMSGHDRFLAG_RESPONSE 4
1156 * While we want to handle util services as regular devices,
1157 * there is only one instance of each of these services; so
1158 * we statically allocate the service specific state.
1161 struct hv_util_service {
1163 void (*util_cb)(void *);
1164 int (*util_init)(struct hv_util_service *);
1165 void (*util_deinit)(void);
1168 struct vmbuspipe_hdr {
1179 struct ic_version icverframe;
1181 struct ic_version icvermsg;
1184 u8 ictransaction_id;
1189 struct icmsg_negotiate {
1193 struct ic_version icversion_data[1]; /* any size array */
1196 struct shutdown_msg_data {
1198 u32 timeout_seconds;
1200 u8 display_message[2048];
1203 struct heartbeat_msg_data {
1208 /* Time Sync IC defs */
1209 #define ICTIMESYNCFLAG_PROBE 0
1210 #define ICTIMESYNCFLAG_SYNC 1
1211 #define ICTIMESYNCFLAG_SAMPLE 2
1214 #define WLTIMEDELTA 116444736000000000L /* in 100ns unit */
1216 #define WLTIMEDELTA 116444736000000000LL
1219 struct ictimesync_data {
1226 struct hyperv_service_callback {
1230 struct vmbus_channel *channel;
1231 void (*callback) (void *context);
1234 #define MAX_SRV_VER 0x7ffffff
1235 extern bool vmbus_prep_negotiate_resp(struct icmsg_hdr *,
1236 struct icmsg_negotiate *, u8 *, int,
1239 int hv_kvp_init(struct hv_util_service *);
1240 void hv_kvp_deinit(void);
1241 void hv_kvp_onchannelcallback(void *);
1243 int hv_vss_init(struct hv_util_service *);
1244 void hv_vss_deinit(void);
1245 void hv_vss_onchannelcallback(void *);
1246 void hv_process_channel_removal(struct vmbus_channel *channel, u32 relid);
1248 extern struct resource hyperv_mmio;
1251 * Negotiated version with the Host.
1254 extern __u32 vmbus_proto_version;
1256 #endif /* _HYPERV_H */