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 <uapi/linux/hyperv.h>
29 #include <uapi/asm/hyperv.h>
31 #include <linux/types.h>
32 #include <linux/scatterlist.h>
33 #include <linux/list.h>
34 #include <linux/timer.h>
35 #include <linux/workqueue.h>
36 #include <linux/completion.h>
37 #include <linux/device.h>
38 #include <linux/mod_devicetable.h>
41 #define MAX_PAGE_BUFFER_COUNT 32
42 #define MAX_MULTIPAGE_BUFFER_COUNT 32 /* 128K */
46 /* Single-page buffer */
47 struct hv_page_buffer {
53 /* Multiple-page buffer */
54 struct hv_multipage_buffer {
55 /* Length and Offset determines the # of pfns in the array */
58 u64 pfn_array[MAX_MULTIPAGE_BUFFER_COUNT];
62 * Multiple-page buffer array; the pfn array is variable size:
63 * The number of entries in the PFN array is determined by
67 /* Length and Offset determines the # of pfns in the array */
73 /* 0x18 includes the proprietary packet header */
74 #define MAX_PAGE_BUFFER_PACKET (0x18 + \
75 (sizeof(struct hv_page_buffer) * \
76 MAX_PAGE_BUFFER_COUNT))
77 #define MAX_MULTIPAGE_BUFFER_PACKET (0x18 + \
78 sizeof(struct hv_multipage_buffer))
83 struct hv_ring_buffer {
84 /* Offset in bytes from the start of ring data below */
87 /* Offset in bytes from the start of ring data below */
93 * Win8 uses some of the reserved bits to implement
94 * interrupt driven flow management. On the send side
95 * we can request that the receiver interrupt the sender
96 * when the ring transitions from being full to being able
97 * to handle a message of size "pending_send_sz".
99 * Add necessary state for this enhancement.
107 u32 feat_pending_send_sz:1;
112 /* Pad it to PAGE_SIZE so that data starts on page boundary */
116 * Ring data starts here + RingDataStartOffset
117 * !!! DO NOT place any fields below this !!!
122 struct hv_ring_buffer_info {
123 struct hv_ring_buffer *ring_buffer;
124 u32 ring_size; /* Include the shared header */
125 spinlock_t ring_lock;
127 u32 ring_datasize; /* < ring_size */
128 u32 ring_data_startoffset;
133 * hv_get_ringbuffer_availbytes()
135 * Get number of bytes available to read and to write to
136 * for the specified ring buffer
139 hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi,
140 u32 *read, u32 *write)
142 u32 read_loc, write_loc, dsize;
144 /* Capture the read/write indices before they changed */
145 read_loc = rbi->ring_buffer->read_index;
146 write_loc = rbi->ring_buffer->write_index;
147 dsize = rbi->ring_datasize;
149 *write = write_loc >= read_loc ? dsize - (write_loc - read_loc) :
150 read_loc - write_loc;
151 *read = dsize - *write;
154 static inline u32 hv_get_bytes_to_read(struct hv_ring_buffer_info *rbi)
156 u32 read_loc, write_loc, dsize, read;
158 dsize = rbi->ring_datasize;
159 read_loc = rbi->ring_buffer->read_index;
160 write_loc = READ_ONCE(rbi->ring_buffer->write_index);
162 read = write_loc >= read_loc ? (write_loc - read_loc) :
163 (dsize - read_loc) + write_loc;
168 static inline u32 hv_get_bytes_to_write(struct hv_ring_buffer_info *rbi)
170 u32 read_loc, write_loc, dsize, write;
172 dsize = rbi->ring_datasize;
173 read_loc = READ_ONCE(rbi->ring_buffer->read_index);
174 write_loc = rbi->ring_buffer->write_index;
176 write = write_loc >= read_loc ? dsize - (write_loc - read_loc) :
177 read_loc - write_loc;
182 * VMBUS version is 32 bit entity broken up into
183 * two 16 bit quantities: major_number. minor_number.
185 * 0 . 13 (Windows Server 2008)
188 * 3 . 0 (Windows 8 R2)
192 #define VERSION_WS2008 ((0 << 16) | (13))
193 #define VERSION_WIN7 ((1 << 16) | (1))
194 #define VERSION_WIN8 ((2 << 16) | (4))
195 #define VERSION_WIN8_1 ((3 << 16) | (0))
196 #define VERSION_WIN10 ((4 << 16) | (0))
198 #define VERSION_INVAL -1
200 #define VERSION_CURRENT VERSION_WIN10
202 /* Make maximum size of pipe payload of 16K */
203 #define MAX_PIPE_DATA_PAYLOAD (sizeof(u8) * 16384)
205 /* Define PipeMode values. */
206 #define VMBUS_PIPE_TYPE_BYTE 0x00000000
207 #define VMBUS_PIPE_TYPE_MESSAGE 0x00000004
209 /* The size of the user defined data buffer for non-pipe offers. */
210 #define MAX_USER_DEFINED_BYTES 120
212 /* The size of the user defined data buffer for pipe offers. */
213 #define MAX_PIPE_USER_DEFINED_BYTES 116
216 * At the center of the Channel Management library is the Channel Offer. This
217 * struct contains the fundamental information about an offer.
219 struct vmbus_channel_offer {
224 * These two fields are not currently used.
230 u16 mmio_megabytes; /* in bytes * 1024 * 1024 */
233 /* Non-pipes: The user has MAX_USER_DEFINED_BYTES bytes. */
235 unsigned char user_def[MAX_USER_DEFINED_BYTES];
240 * The following sructure is an integrated pipe protocol, which
241 * is implemented on top of standard user-defined data. Pipe
242 * clients have MAX_PIPE_USER_DEFINED_BYTES left for their own
247 unsigned char user_def[MAX_PIPE_USER_DEFINED_BYTES];
251 * The sub_channel_index is defined in win8.
253 u16 sub_channel_index;
258 #define VMBUS_CHANNEL_ENUMERATE_DEVICE_INTERFACE 1
259 #define VMBUS_CHANNEL_SERVER_SUPPORTS_TRANSFER_PAGES 2
260 #define VMBUS_CHANNEL_SERVER_SUPPORTS_GPADLS 4
261 #define VMBUS_CHANNEL_NAMED_PIPE_MODE 0x10
262 #define VMBUS_CHANNEL_LOOPBACK_OFFER 0x100
263 #define VMBUS_CHANNEL_PARENT_OFFER 0x200
264 #define VMBUS_CHANNEL_REQUEST_MONITORED_NOTIFICATION 0x400
265 #define VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER 0x2000
267 struct vmpacket_descriptor {
275 struct vmpacket_header {
276 u32 prev_pkt_start_offset;
277 struct vmpacket_descriptor descriptor;
280 struct vmtransfer_page_range {
285 struct vmtransfer_page_packet_header {
286 struct vmpacket_descriptor d;
291 struct vmtransfer_page_range ranges[1];
294 struct vmgpadl_packet_header {
295 struct vmpacket_descriptor d;
300 struct vmadd_remove_transfer_page_set {
301 struct vmpacket_descriptor d;
308 * This structure defines a range in guest physical space that can be made to
309 * look virtually contiguous.
318 * This is the format for an Establish Gpadl packet, which contains a handle by
319 * which this GPADL will be known and a set of GPA ranges associated with it.
320 * This can be converted to a MDL by the guest OS. If there are multiple GPA
321 * ranges, then the resulting MDL will be "chained," representing multiple VA
324 struct vmestablish_gpadl {
325 struct vmpacket_descriptor d;
328 struct gpa_range range[1];
332 * This is the format for a Teardown Gpadl packet, which indicates that the
333 * GPADL handle in the Establish Gpadl packet will never be referenced again.
335 struct vmteardown_gpadl {
336 struct vmpacket_descriptor d;
338 u32 reserved; /* for alignment to a 8-byte boundary */
342 * This is the format for a GPA-Direct packet, which contains a set of GPA
343 * ranges, in addition to commands and/or data.
345 struct vmdata_gpa_direct {
346 struct vmpacket_descriptor d;
349 struct gpa_range range[1];
352 /* This is the format for a Additional Data Packet. */
353 struct vmadditional_data {
354 struct vmpacket_descriptor d;
358 unsigned char data[1];
361 union vmpacket_largest_possible_header {
362 struct vmpacket_descriptor simple_hdr;
363 struct vmtransfer_page_packet_header xfer_page_hdr;
364 struct vmgpadl_packet_header gpadl_hdr;
365 struct vmadd_remove_transfer_page_set add_rm_xfer_page_hdr;
366 struct vmestablish_gpadl establish_gpadl_hdr;
367 struct vmteardown_gpadl teardown_gpadl_hdr;
368 struct vmdata_gpa_direct data_gpa_direct_hdr;
371 #define VMPACKET_DATA_START_ADDRESS(__packet) \
372 (void *)(((unsigned char *)__packet) + \
373 ((struct vmpacket_descriptor)__packet)->offset8 * 8)
375 #define VMPACKET_DATA_LENGTH(__packet) \
376 ((((struct vmpacket_descriptor)__packet)->len8 - \
377 ((struct vmpacket_descriptor)__packet)->offset8) * 8)
379 #define VMPACKET_TRANSFER_MODE(__packet) \
380 (((struct IMPACT)__packet)->type)
382 enum vmbus_packet_type {
383 VM_PKT_INVALID = 0x0,
385 VM_PKT_ADD_XFER_PAGESET = 0x2,
386 VM_PKT_RM_XFER_PAGESET = 0x3,
387 VM_PKT_ESTABLISH_GPADL = 0x4,
388 VM_PKT_TEARDOWN_GPADL = 0x5,
389 VM_PKT_DATA_INBAND = 0x6,
390 VM_PKT_DATA_USING_XFER_PAGES = 0x7,
391 VM_PKT_DATA_USING_GPADL = 0x8,
392 VM_PKT_DATA_USING_GPA_DIRECT = 0x9,
393 VM_PKT_CANCEL_REQUEST = 0xa,
395 VM_PKT_DATA_USING_ADDITIONAL_PKT = 0xc,
396 VM_PKT_ADDITIONAL_DATA = 0xd
399 #define VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED 1
402 /* Version 1 messages */
403 enum vmbus_channel_message_type {
404 CHANNELMSG_INVALID = 0,
405 CHANNELMSG_OFFERCHANNEL = 1,
406 CHANNELMSG_RESCIND_CHANNELOFFER = 2,
407 CHANNELMSG_REQUESTOFFERS = 3,
408 CHANNELMSG_ALLOFFERS_DELIVERED = 4,
409 CHANNELMSG_OPENCHANNEL = 5,
410 CHANNELMSG_OPENCHANNEL_RESULT = 6,
411 CHANNELMSG_CLOSECHANNEL = 7,
412 CHANNELMSG_GPADL_HEADER = 8,
413 CHANNELMSG_GPADL_BODY = 9,
414 CHANNELMSG_GPADL_CREATED = 10,
415 CHANNELMSG_GPADL_TEARDOWN = 11,
416 CHANNELMSG_GPADL_TORNDOWN = 12,
417 CHANNELMSG_RELID_RELEASED = 13,
418 CHANNELMSG_INITIATE_CONTACT = 14,
419 CHANNELMSG_VERSION_RESPONSE = 15,
420 CHANNELMSG_UNLOAD = 16,
421 CHANNELMSG_UNLOAD_RESPONSE = 17,
425 CHANNELMSG_TL_CONNECT_REQUEST = 21,
429 struct vmbus_channel_message_header {
430 enum vmbus_channel_message_type msgtype;
434 /* Query VMBus Version parameters */
435 struct vmbus_channel_query_vmbus_version {
436 struct vmbus_channel_message_header header;
440 /* VMBus Version Supported parameters */
441 struct vmbus_channel_version_supported {
442 struct vmbus_channel_message_header header;
443 u8 version_supported;
446 /* Offer Channel parameters */
447 struct vmbus_channel_offer_channel {
448 struct vmbus_channel_message_header header;
449 struct vmbus_channel_offer offer;
453 * win7 and beyond splits this field into a bit field.
455 u8 monitor_allocated:1;
458 * These are new fields added in win7 and later.
459 * Do not access these fields without checking the
460 * negotiated protocol.
462 * If "is_dedicated_interrupt" is set, we must not set the
463 * associated bit in the channel bitmap while sending the
464 * interrupt to the host.
466 * connection_id is to be used in signaling the host.
468 u16 is_dedicated_interrupt:1;
473 /* Rescind Offer parameters */
474 struct vmbus_channel_rescind_offer {
475 struct vmbus_channel_message_header header;
480 * Request Offer -- no parameters, SynIC message contains the partition ID
481 * Set Snoop -- no parameters, SynIC message contains the partition ID
482 * Clear Snoop -- no parameters, SynIC message contains the partition ID
483 * All Offers Delivered -- no parameters, SynIC message contains the partition
485 * Flush Client -- no parameters, SynIC message contains the partition ID
488 /* Open Channel parameters */
489 struct vmbus_channel_open_channel {
490 struct vmbus_channel_message_header header;
492 /* Identifies the specific VMBus channel that is being opened. */
495 /* ID making a particular open request at a channel offer unique. */
498 /* GPADL for the channel's ring buffer. */
499 u32 ringbuffer_gpadlhandle;
502 * Starting with win8, this field will be used to specify
503 * the target virtual processor on which to deliver the interrupt for
504 * the host to guest communication.
505 * Prior to win8, incoming channel interrupts would only
506 * be delivered on cpu 0. Setting this value to 0 would
507 * preserve the earlier behavior.
512 * The upstream ring buffer begins at offset zero in the memory
513 * described by RingBufferGpadlHandle. The downstream ring buffer
514 * follows it at this offset (in pages).
516 u32 downstream_ringbuffer_pageoffset;
518 /* User-specific data to be passed along to the server endpoint. */
519 unsigned char userdata[MAX_USER_DEFINED_BYTES];
522 /* Open Channel Result parameters */
523 struct vmbus_channel_open_result {
524 struct vmbus_channel_message_header header;
530 /* Close channel parameters; */
531 struct vmbus_channel_close_channel {
532 struct vmbus_channel_message_header header;
536 /* Channel Message GPADL */
537 #define GPADL_TYPE_RING_BUFFER 1
538 #define GPADL_TYPE_SERVER_SAVE_AREA 2
539 #define GPADL_TYPE_TRANSACTION 8
542 * The number of PFNs in a GPADL message is defined by the number of
543 * pages that would be spanned by ByteCount and ByteOffset. If the
544 * implied number of PFNs won't fit in this packet, there will be a
545 * follow-up packet that contains more.
547 struct vmbus_channel_gpadl_header {
548 struct vmbus_channel_message_header header;
553 struct gpa_range range[0];
556 /* This is the followup packet that contains more PFNs. */
557 struct vmbus_channel_gpadl_body {
558 struct vmbus_channel_message_header header;
564 struct vmbus_channel_gpadl_created {
565 struct vmbus_channel_message_header header;
571 struct vmbus_channel_gpadl_teardown {
572 struct vmbus_channel_message_header header;
577 struct vmbus_channel_gpadl_torndown {
578 struct vmbus_channel_message_header header;
582 struct vmbus_channel_relid_released {
583 struct vmbus_channel_message_header header;
587 struct vmbus_channel_initiate_contact {
588 struct vmbus_channel_message_header header;
589 u32 vmbus_version_requested;
590 u32 target_vcpu; /* The VCPU the host should respond to */
596 /* Hyper-V socket: guest's connect()-ing to host */
597 struct vmbus_channel_tl_connect_request {
598 struct vmbus_channel_message_header header;
599 uuid_le guest_endpoint_id;
600 uuid_le host_service_id;
603 struct vmbus_channel_version_response {
604 struct vmbus_channel_message_header header;
605 u8 version_supported;
608 enum vmbus_channel_state {
610 CHANNEL_OPENING_STATE,
612 CHANNEL_OPENED_STATE,
616 * Represents each channel msg on the vmbus connection This is a
617 * variable-size data structure depending on the msg type itself
619 struct vmbus_channel_msginfo {
620 /* Bookkeeping stuff */
621 struct list_head msglistentry;
623 /* So far, this is only used to handle gpadl body message */
624 struct list_head submsglist;
626 /* Synchronize the request/response if needed */
627 struct completion waitevent;
629 struct vmbus_channel_version_supported version_supported;
630 struct vmbus_channel_open_result open_result;
631 struct vmbus_channel_gpadl_torndown gpadl_torndown;
632 struct vmbus_channel_gpadl_created gpadl_created;
633 struct vmbus_channel_version_response version_response;
638 * The channel message that goes out on the "wire".
639 * It will contain at minimum the VMBUS_CHANNEL_MESSAGE_HEADER header
641 unsigned char msg[0];
644 struct vmbus_close_msg {
645 struct vmbus_channel_msginfo info;
646 struct vmbus_channel_close_channel msg;
649 /* Define connection identifier type. */
650 union hv_connection_id {
658 /* Definition of the hv_signal_event hypercall input structure. */
659 struct hv_input_signal_event {
660 union hv_connection_id connectionid;
665 struct hv_input_signal_event_buffer {
667 struct hv_input_signal_event event;
670 enum hv_signal_policy {
671 HV_SIGNAL_POLICY_DEFAULT = 0,
672 HV_SIGNAL_POLICY_EXPLICIT,
675 enum vmbus_device_type {
695 struct vmbus_device {
701 struct vmbus_channel {
702 /* Unique channel id */
705 struct list_head listentry;
707 struct hv_device *device_obj;
709 enum vmbus_channel_state state;
711 struct vmbus_channel_offer_channel offermsg;
713 * These are based on the OfferMsg.MonitorId.
714 * Save it here for easy access.
719 bool rescind; /* got rescind msg */
721 u32 ringbuffer_gpadlhandle;
723 /* Allocated memory for ring buffer */
724 void *ringbuffer_pages;
725 u32 ringbuffer_pagecount;
726 struct hv_ring_buffer_info outbound; /* send to parent */
727 struct hv_ring_buffer_info inbound; /* receive from parent */
728 spinlock_t inbound_lock;
730 struct vmbus_close_msg close_msg;
732 /* Channel callback are invoked in this workqueue context */
733 /* HANDLE dataWorkQueue; */
735 void (*onchannel_callback)(void *context);
736 void *channel_callback_context;
739 * A channel can be marked for efficient (batched)
741 * If batched_reading is set to "true", we read until the
742 * channel is empty and hold off interrupts from the host
743 * during the entire read process.
744 * If batched_reading is set to "false", the client is not
745 * going to perform batched reading.
747 * By default we will enable batched reading; specific
748 * drivers that don't want this behavior can turn it off.
751 bool batched_reading;
753 bool is_dedicated_interrupt;
754 struct hv_input_signal_event_buffer sig_buf;
755 struct hv_input_signal_event *sig_event;
758 * Starting with win8, this field will be used to specify
759 * the target virtual processor on which to deliver the interrupt for
760 * the host to guest communication.
761 * Prior to win8, incoming channel interrupts would only
762 * be delivered on cpu 0. Setting this value to 0 would
763 * preserve the earlier behavior.
766 /* The corresponding CPUID in the guest */
769 * State to manage the CPU affiliation of channels.
771 struct cpumask alloced_cpus_in_node;
774 * Support for sub-channels. For high performance devices,
775 * it will be useful to have multiple sub-channels to support
776 * a scalable communication infrastructure with the host.
777 * The support for sub-channels is implemented as an extention
778 * to the current infrastructure.
779 * The initial offer is considered the primary channel and this
780 * offer message will indicate if the host supports sub-channels.
781 * The guest is free to ask for sub-channels to be offerred and can
782 * open these sub-channels as a normal "primary" channel. However,
783 * all sub-channels will have the same type and instance guids as the
784 * primary channel. Requests sent on a given channel will result in a
785 * response on the same channel.
789 * Sub-channel creation callback. This callback will be called in
790 * process context when a sub-channel offer is received from the host.
791 * The guest can open the sub-channel in the context of this callback.
793 void (*sc_creation_callback)(struct vmbus_channel *new_sc);
796 * Channel rescind callback. Some channels (the hvsock ones), need to
797 * register a callback which is invoked in vmbus_onoffer_rescind().
799 void (*chn_rescind_callback)(struct vmbus_channel *channel);
802 * The spinlock to protect the structure. It is being used to protect
803 * test-and-set access to various attributes of the structure as well
804 * as all sc_list operations.
808 * All Sub-channels of a primary channel are linked here.
810 struct list_head sc_list;
812 * Current number of sub-channels.
816 * Number of a sub-channel (position within sc_list) which is supposed
817 * to be used as the next outgoing channel.
821 * The primary channel this sub-channel belongs to.
822 * This will be NULL for the primary channel.
824 struct vmbus_channel *primary_channel;
826 * Support per-channel state for use by vmbus drivers.
828 void *per_channel_state;
830 * To support per-cpu lookup mapping of relid to channel,
831 * link up channels based on their CPU affinity.
833 struct list_head percpu_list;
835 * Host signaling policy: The default policy will be
836 * based on the ring buffer state. We will also support
837 * a policy where the client driver can have explicit
840 enum hv_signal_policy signal_policy;
842 * On the channel send side, many of the VMBUS
843 * device drivers explicity serialize access to the
844 * outgoing ring buffer. Give more control to the
845 * VMBUS device drivers in terms how to serialize
846 * accesss to the outgoing ring buffer.
847 * The default behavior will be to aquire the
848 * ring lock to preserve the current behavior.
850 bool acquire_ring_lock;
854 static inline void set_channel_lock_state(struct vmbus_channel *c, bool state)
856 c->acquire_ring_lock = state;
859 static inline bool is_hvsock_channel(const struct vmbus_channel *c)
861 return !!(c->offermsg.offer.chn_flags &
862 VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER);
865 static inline void set_channel_signal_state(struct vmbus_channel *c,
866 enum hv_signal_policy policy)
868 c->signal_policy = policy;
871 static inline void set_channel_read_state(struct vmbus_channel *c, bool state)
873 c->batched_reading = state;
876 static inline void set_per_channel_state(struct vmbus_channel *c, void *s)
878 c->per_channel_state = s;
881 static inline void *get_per_channel_state(struct vmbus_channel *c)
883 return c->per_channel_state;
886 static inline void set_channel_pending_send_size(struct vmbus_channel *c,
889 c->outbound.ring_buffer->pending_send_sz = size;
892 void vmbus_onmessage(void *context);
894 int vmbus_request_offers(void);
897 * APIs for managing sub-channels.
900 void vmbus_set_sc_create_callback(struct vmbus_channel *primary_channel,
901 void (*sc_cr_cb)(struct vmbus_channel *new_sc));
903 void vmbus_set_chn_rescind_callback(struct vmbus_channel *channel,
904 void (*chn_rescind_cb)(struct vmbus_channel *));
907 * Retrieve the (sub) channel on which to send an outgoing request.
908 * When a primary channel has multiple sub-channels, we choose a
909 * channel whose VCPU binding is closest to the VCPU on which
910 * this call is being made.
912 struct vmbus_channel *vmbus_get_outgoing_channel(struct vmbus_channel *primary);
915 * Check if sub-channels have already been offerred. This API will be useful
916 * when the driver is unloaded after establishing sub-channels. In this case,
917 * when the driver is re-loaded, the driver would have to check if the
918 * subchannels have already been established before attempting to request
919 * the creation of sub-channels.
920 * This function returns TRUE to indicate that subchannels have already been
922 * This function should be invoked after setting the callback function for
923 * sub-channel creation.
925 bool vmbus_are_subchannels_present(struct vmbus_channel *primary);
927 /* The format must be the same as struct vmdata_gpa_direct */
928 struct vmbus_channel_packet_page_buffer {
936 struct hv_page_buffer range[MAX_PAGE_BUFFER_COUNT];
939 /* The format must be the same as struct vmdata_gpa_direct */
940 struct vmbus_channel_packet_multipage_buffer {
947 u32 rangecount; /* Always 1 in this case */
948 struct hv_multipage_buffer range;
951 /* The format must be the same as struct vmdata_gpa_direct */
952 struct vmbus_packet_mpb_array {
959 u32 rangecount; /* Always 1 in this case */
960 struct hv_mpb_array range;
964 extern int vmbus_open(struct vmbus_channel *channel,
965 u32 send_ringbuffersize,
966 u32 recv_ringbuffersize,
969 void(*onchannel_callback)(void *context),
972 extern void vmbus_close(struct vmbus_channel *channel);
974 extern int vmbus_sendpacket(struct vmbus_channel *channel,
978 enum vmbus_packet_type type,
981 extern int vmbus_sendpacket_ctl(struct vmbus_channel *channel,
985 enum vmbus_packet_type type,
989 extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
990 struct hv_page_buffer pagebuffers[],
996 extern int vmbus_sendpacket_pagebuffer_ctl(struct vmbus_channel *channel,
997 struct hv_page_buffer pagebuffers[],
1005 extern int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel,
1006 struct hv_multipage_buffer *mpb,
1011 extern int vmbus_sendpacket_mpb_desc(struct vmbus_channel *channel,
1012 struct vmbus_packet_mpb_array *mpb,
1018 extern int vmbus_establish_gpadl(struct vmbus_channel *channel,
1023 extern int vmbus_teardown_gpadl(struct vmbus_channel *channel,
1026 extern int vmbus_recvpacket(struct vmbus_channel *channel,
1029 u32 *buffer_actual_len,
1032 extern int vmbus_recvpacket_raw(struct vmbus_channel *channel,
1035 u32 *buffer_actual_len,
1039 extern void vmbus_ontimer(unsigned long data);
1041 /* Base driver object */
1046 * A hvsock offer, which has a VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER
1047 * channel flag, actually doesn't mean a synthetic device because the
1048 * offer's if_type/if_instance can change for every new hvsock
1051 * However, to facilitate the notification of new-offer/rescind-offer
1052 * from vmbus driver to hvsock driver, we can handle hvsock offer as
1053 * a special vmbus device, and hence we need the below flag to
1054 * indicate if the driver is the hvsock driver or not: we need to
1055 * specially treat the hvosck offer & driver in vmbus_match().
1059 /* the device type supported by this driver */
1061 const struct hv_vmbus_device_id *id_table;
1063 struct device_driver driver;
1065 int (*probe)(struct hv_device *, const struct hv_vmbus_device_id *);
1066 int (*remove)(struct hv_device *);
1067 void (*shutdown)(struct hv_device *);
1071 /* Base device object */
1073 /* the device type id of this device */
1076 /* the device instance id of this device */
1077 uuid_le dev_instance;
1081 struct device device;
1083 struct vmbus_channel *channel;
1087 static inline struct hv_device *device_to_hv_device(struct device *d)
1089 return container_of(d, struct hv_device, device);
1092 static inline struct hv_driver *drv_to_hv_drv(struct device_driver *d)
1094 return container_of(d, struct hv_driver, driver);
1097 static inline void hv_set_drvdata(struct hv_device *dev, void *data)
1099 dev_set_drvdata(&dev->device, data);
1102 static inline void *hv_get_drvdata(struct hv_device *dev)
1104 return dev_get_drvdata(&dev->device);
1107 /* Vmbus interface */
1108 #define vmbus_driver_register(driver) \
1109 __vmbus_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
1110 int __must_check __vmbus_driver_register(struct hv_driver *hv_driver,
1111 struct module *owner,
1112 const char *mod_name);
1113 void vmbus_driver_unregister(struct hv_driver *hv_driver);
1115 void vmbus_hvsock_device_unregister(struct vmbus_channel *channel);
1117 int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj,
1118 resource_size_t min, resource_size_t max,
1119 resource_size_t size, resource_size_t align,
1120 bool fb_overlap_ok);
1122 int vmbus_cpu_number_to_vp_number(int cpu_number);
1123 u64 hv_do_hypercall(u64 control, void *input, void *output);
1126 * GUID definitions of various offer types - services offered to the guest.
1131 * {f8615163-df3e-46c5-913f-f2d2f965ed0e}
1133 #define HV_NIC_GUID \
1134 .guid = UUID_LE(0xf8615163, 0xdf3e, 0x46c5, 0x91, 0x3f, \
1135 0xf2, 0xd2, 0xf9, 0x65, 0xed, 0x0e)
1139 * {32412632-86cb-44a2-9b5c-50d1417354f5}
1141 #define HV_IDE_GUID \
1142 .guid = UUID_LE(0x32412632, 0x86cb, 0x44a2, 0x9b, 0x5c, \
1143 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5)
1147 * {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f}
1149 #define HV_SCSI_GUID \
1150 .guid = UUID_LE(0xba6163d9, 0x04a1, 0x4d29, 0xb6, 0x05, \
1151 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f)
1155 * {0e0b6031-5213-4934-818b-38d90ced39db}
1157 #define HV_SHUTDOWN_GUID \
1158 .guid = UUID_LE(0x0e0b6031, 0x5213, 0x4934, 0x81, 0x8b, \
1159 0x38, 0xd9, 0x0c, 0xed, 0x39, 0xdb)
1163 * {9527E630-D0AE-497b-ADCE-E80AB0175CAF}
1165 #define HV_TS_GUID \
1166 .guid = UUID_LE(0x9527e630, 0xd0ae, 0x497b, 0xad, 0xce, \
1167 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf)
1171 * {57164f39-9115-4e78-ab55-382f3bd5422d}
1173 #define HV_HEART_BEAT_GUID \
1174 .guid = UUID_LE(0x57164f39, 0x9115, 0x4e78, 0xab, 0x55, \
1175 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d)
1179 * {a9a0f4e7-5a45-4d96-b827-8a841e8c03e6}
1181 #define HV_KVP_GUID \
1182 .guid = UUID_LE(0xa9a0f4e7, 0x5a45, 0x4d96, 0xb8, 0x27, \
1183 0x8a, 0x84, 0x1e, 0x8c, 0x03, 0xe6)
1186 * Dynamic memory GUID
1187 * {525074dc-8985-46e2-8057-a307dc18a502}
1189 #define HV_DM_GUID \
1190 .guid = UUID_LE(0x525074dc, 0x8985, 0x46e2, 0x80, 0x57, \
1191 0xa3, 0x07, 0xdc, 0x18, 0xa5, 0x02)
1195 * {cfa8b69e-5b4a-4cc0-b98b-8ba1a1f3f95a}
1197 #define HV_MOUSE_GUID \
1198 .guid = UUID_LE(0xcfa8b69e, 0x5b4a, 0x4cc0, 0xb9, 0x8b, \
1199 0x8b, 0xa1, 0xa1, 0xf3, 0xf9, 0x5a)
1203 * {f912ad6d-2b17-48ea-bd65-f927a61c7684}
1205 #define HV_KBD_GUID \
1206 .guid = UUID_LE(0xf912ad6d, 0x2b17, 0x48ea, 0xbd, 0x65, \
1207 0xf9, 0x27, 0xa6, 0x1c, 0x76, 0x84)
1210 * VSS (Backup/Restore) GUID
1212 #define HV_VSS_GUID \
1213 .guid = UUID_LE(0x35fa2e29, 0xea23, 0x4236, 0x96, 0xae, \
1214 0x3a, 0x6e, 0xba, 0xcb, 0xa4, 0x40)
1216 * Synthetic Video GUID
1217 * {DA0A7802-E377-4aac-8E77-0558EB1073F8}
1219 #define HV_SYNTHVID_GUID \
1220 .guid = UUID_LE(0xda0a7802, 0xe377, 0x4aac, 0x8e, 0x77, \
1221 0x05, 0x58, 0xeb, 0x10, 0x73, 0xf8)
1225 * {2f9bcc4a-0069-4af3-b76b-6fd0be528cda}
1227 #define HV_SYNTHFC_GUID \
1228 .guid = UUID_LE(0x2f9bcc4a, 0x0069, 0x4af3, 0xb7, 0x6b, \
1229 0x6f, 0xd0, 0xbe, 0x52, 0x8c, 0xda)
1232 * Guest File Copy Service
1233 * {34D14BE3-DEE4-41c8-9AE7-6B174977C192}
1236 #define HV_FCOPY_GUID \
1237 .guid = UUID_LE(0x34d14be3, 0xdee4, 0x41c8, 0x9a, 0xe7, \
1238 0x6b, 0x17, 0x49, 0x77, 0xc1, 0x92)
1241 * NetworkDirect. This is the guest RDMA service.
1242 * {8c2eaf3d-32a7-4b09-ab99-bd1f1c86b501}
1244 #define HV_ND_GUID \
1245 .guid = UUID_LE(0x8c2eaf3d, 0x32a7, 0x4b09, 0xab, 0x99, \
1246 0xbd, 0x1f, 0x1c, 0x86, 0xb5, 0x01)
1249 * PCI Express Pass Through
1250 * {44C4F61D-4444-4400-9D52-802E27EDE19F}
1253 #define HV_PCIE_GUID \
1254 .guid = UUID_LE(0x44c4f61d, 0x4444, 0x4400, 0x9d, 0x52, \
1255 0x80, 0x2e, 0x27, 0xed, 0xe1, 0x9f)
1258 * Common header for Hyper-V ICs
1261 #define ICMSGTYPE_NEGOTIATE 0
1262 #define ICMSGTYPE_HEARTBEAT 1
1263 #define ICMSGTYPE_KVPEXCHANGE 2
1264 #define ICMSGTYPE_SHUTDOWN 3
1265 #define ICMSGTYPE_TIMESYNC 4
1266 #define ICMSGTYPE_VSS 5
1268 #define ICMSGHDRFLAG_TRANSACTION 1
1269 #define ICMSGHDRFLAG_REQUEST 2
1270 #define ICMSGHDRFLAG_RESPONSE 4
1274 * While we want to handle util services as regular devices,
1275 * there is only one instance of each of these services; so
1276 * we statically allocate the service specific state.
1279 struct hv_util_service {
1282 void (*util_cb)(void *);
1283 int (*util_init)(struct hv_util_service *);
1284 void (*util_deinit)(void);
1287 struct vmbuspipe_hdr {
1298 struct ic_version icverframe;
1300 struct ic_version icvermsg;
1303 u8 ictransaction_id;
1308 struct icmsg_negotiate {
1312 struct ic_version icversion_data[1]; /* any size array */
1315 struct shutdown_msg_data {
1317 u32 timeout_seconds;
1319 u8 display_message[2048];
1322 struct heartbeat_msg_data {
1327 /* Time Sync IC defs */
1328 #define ICTIMESYNCFLAG_PROBE 0
1329 #define ICTIMESYNCFLAG_SYNC 1
1330 #define ICTIMESYNCFLAG_SAMPLE 2
1333 #define WLTIMEDELTA 116444736000000000L /* in 100ns unit */
1335 #define WLTIMEDELTA 116444736000000000LL
1338 struct ictimesync_data {
1345 struct hyperv_service_callback {
1349 struct vmbus_channel *channel;
1350 void (*callback) (void *context);
1353 #define MAX_SRV_VER 0x7ffffff
1354 extern bool vmbus_prep_negotiate_resp(struct icmsg_hdr *,
1355 struct icmsg_negotiate *, u8 *, int,
1358 void hv_process_channel_removal(struct vmbus_channel *channel, u32 relid);
1361 * Negotiated version with the Host.
1364 extern __u32 vmbus_proto_version;
1366 int vmbus_send_tl_connect_request(const uuid_le *shv_guest_servie_id,
1367 const uuid_le *shv_host_servie_id);
1368 #endif /* _HYPERV_H */