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K. Y. Srinivasan0f2a6612011-05-12 19:34:28 -07001/*
2 *
3 * Copyright (c) 2011, Microsoft Corporation.
4 *
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.
8 *
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
12 * more details.
13 *
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.
17 *
18 * Authors:
19 * Haiyang Zhang <haiyangz@microsoft.com>
20 * Hank Janssen <hjanssen@microsoft.com>
21 * K. Y. Srinivasan <kys@microsoft.com>
22 *
23 */
24
25#ifndef _HYPERV_VMBUS_H
26#define _HYPERV_VMBUS_H
27
K. Y. Srinivasan43c698b2011-05-12 19:34:33 -070028#include <linux/list.h>
29#include <asm/sync_bitops.h>
30#include <linux/atomic.h>
Greg Kroah-Hartman46a97192011-10-04 12:29:52 -070031#include <linux/hyperv.h>
K. Y. Srinivasan43c698b2011-05-12 19:34:33 -070032
K. Y. Srinivasanafbdc4a2011-05-12 19:34:29 -070033/*
34 * The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent
35 * is set by CPUID(HVCPUID_VERSION_FEATURES).
36 */
37enum hv_cpuid_function {
38 HVCPUID_VERSION_FEATURES = 0x00000001,
39 HVCPUID_VENDOR_MAXFUNCTION = 0x40000000,
40 HVCPUID_INTERFACE = 0x40000001,
41
42 /*
43 * The remaining functions depend on the value of
44 * HVCPUID_INTERFACE
45 */
46 HVCPUID_VERSION = 0x40000002,
47 HVCPUID_FEATURES = 0x40000003,
48 HVCPUID_ENLIGHTENMENT_INFO = 0x40000004,
49 HVCPUID_IMPLEMENTATION_LIMITS = 0x40000005,
50};
51
52/* Define version of the synthetic interrupt controller. */
53#define HV_SYNIC_VERSION (1)
54
55/* Define the expected SynIC version. */
56#define HV_SYNIC_VERSION_1 (0x1)
57
58/* Define synthetic interrupt controller message constants. */
59#define HV_MESSAGE_SIZE (256)
60#define HV_MESSAGE_PAYLOAD_BYTE_COUNT (240)
61#define HV_MESSAGE_PAYLOAD_QWORD_COUNT (30)
62#define HV_ANY_VP (0xFFFFFFFF)
63
64/* Define synthetic interrupt controller flag constants. */
65#define HV_EVENT_FLAGS_COUNT (256 * 8)
66#define HV_EVENT_FLAGS_BYTE_COUNT (256)
67#define HV_EVENT_FLAGS_DWORD_COUNT (256 / sizeof(u32))
68
69/* Define hypervisor message types. */
70enum hv_message_type {
71 HVMSG_NONE = 0x00000000,
72
73 /* Memory access messages. */
74 HVMSG_UNMAPPED_GPA = 0x80000000,
75 HVMSG_GPA_INTERCEPT = 0x80000001,
76
77 /* Timer notification messages. */
78 HVMSG_TIMER_EXPIRED = 0x80000010,
79
80 /* Error messages. */
81 HVMSG_INVALID_VP_REGISTER_VALUE = 0x80000020,
82 HVMSG_UNRECOVERABLE_EXCEPTION = 0x80000021,
83 HVMSG_UNSUPPORTED_FEATURE = 0x80000022,
84
85 /* Trace buffer complete messages. */
86 HVMSG_EVENTLOG_BUFFERCOMPLETE = 0x80000040,
87
88 /* Platform-specific processor intercept messages. */
89 HVMSG_X64_IOPORT_INTERCEPT = 0x80010000,
90 HVMSG_X64_MSR_INTERCEPT = 0x80010001,
91 HVMSG_X64_CPUID_INTERCEPT = 0x80010002,
92 HVMSG_X64_EXCEPTION_INTERCEPT = 0x80010003,
93 HVMSG_X64_APIC_EOI = 0x80010004,
94 HVMSG_X64_LEGACY_FP_ERROR = 0x80010005
95};
96
97/* Define the number of synthetic interrupt sources. */
98#define HV_SYNIC_SINT_COUNT (16)
99#define HV_SYNIC_STIMER_COUNT (4)
100
101/* Define invalid partition identifier. */
102#define HV_PARTITION_ID_INVALID ((u64)0x0)
103
K. Y. Srinivasanafbdc4a2011-05-12 19:34:29 -0700104/* Define port identifier type. */
105union hv_port_id {
106 u32 asu32;
107 struct {
108 u32 id:24;
109 u32 reserved:8;
110 } u ;
111};
112
113/* Define port type. */
114enum hv_port_type {
115 HVPORT_MSG = 1,
116 HVPORT_EVENT = 2,
117 HVPORT_MONITOR = 3
118};
119
120/* Define port information structure. */
121struct hv_port_info {
122 enum hv_port_type port_type;
123 u32 padding;
124 union {
125 struct {
126 u32 target_sint;
127 u32 target_vp;
128 u64 rsvdz;
129 } message_port_info;
130 struct {
131 u32 target_sint;
132 u32 target_vp;
133 u16 base_flag_bumber;
134 u16 flag_count;
135 u32 rsvdz;
136 } event_port_info;
137 struct {
138 u64 monitor_address;
139 u64 rsvdz;
140 } monitor_port_info;
141 };
142};
143
144struct hv_connection_info {
145 enum hv_port_type port_type;
146 u32 padding;
147 union {
148 struct {
149 u64 rsvdz;
150 } message_connection_info;
151 struct {
152 u64 rsvdz;
153 } event_connection_info;
154 struct {
155 u64 monitor_address;
156 } monitor_connection_info;
157 };
158};
159
160/* Define synthetic interrupt controller message flags. */
161union hv_message_flags {
162 u8 asu8;
163 struct {
164 u8 msg_pending:1;
165 u8 reserved:7;
166 };
167};
168
169/* Define synthetic interrupt controller message header. */
170struct hv_message_header {
171 enum hv_message_type message_type;
172 u8 payload_size;
173 union hv_message_flags message_flags;
174 u8 reserved[2];
175 union {
176 u64 sender;
177 union hv_port_id port;
178 };
179};
180
181/* Define timer message payload structure. */
182struct hv_timer_message_payload {
183 u32 timer_index;
184 u32 reserved;
185 u64 expiration_time; /* When the timer expired */
186 u64 delivery_time; /* When the message was delivered */
187};
188
189/* Define synthetic interrupt controller message format. */
190struct hv_message {
191 struct hv_message_header header;
192 union {
193 u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
194 } u ;
195};
196
197/* Define the number of message buffers associated with each port. */
198#define HV_PORT_MESSAGE_BUFFER_COUNT (16)
199
200/* Define the synthetic interrupt message page layout. */
201struct hv_message_page {
202 struct hv_message sint_message[HV_SYNIC_SINT_COUNT];
203};
204
205/* Define the synthetic interrupt controller event flags format. */
206union hv_synic_event_flags {
207 u8 flags8[HV_EVENT_FLAGS_BYTE_COUNT];
208 u32 flags32[HV_EVENT_FLAGS_DWORD_COUNT];
209};
210
211/* Define the synthetic interrupt flags page layout. */
212struct hv_synic_event_flags_page {
213 union hv_synic_event_flags sintevent_flags[HV_SYNIC_SINT_COUNT];
214};
215
216/* Define SynIC control register. */
217union hv_synic_scontrol {
218 u64 as_uint64;
219 struct {
220 u64 enable:1;
221 u64 reserved:63;
222 };
223};
224
225/* Define synthetic interrupt source. */
226union hv_synic_sint {
227 u64 as_uint64;
228 struct {
229 u64 vector:8;
230 u64 reserved1:8;
231 u64 masked:1;
232 u64 auto_eoi:1;
233 u64 reserved2:46;
234 };
235};
236
237/* Define the format of the SIMP register */
238union hv_synic_simp {
239 u64 as_uint64;
240 struct {
241 u64 simp_enabled:1;
242 u64 preserved:11;
243 u64 base_simp_gpa:52;
244 };
245};
246
247/* Define the format of the SIEFP register */
248union hv_synic_siefp {
249 u64 as_uint64;
250 struct {
251 u64 siefp_enabled:1;
252 u64 preserved:11;
253 u64 base_siefp_gpa:52;
254 };
255};
256
257/* Definitions for the monitored notification facility */
258union hv_monitor_trigger_group {
259 u64 as_uint64;
260 struct {
261 u32 pending;
262 u32 armed;
263 };
264};
265
266struct hv_monitor_parameter {
267 union hv_connection_id connectionid;
268 u16 flagnumber;
269 u16 rsvdz;
270};
271
272union hv_monitor_trigger_state {
273 u32 asu32;
274
275 struct {
276 u32 group_enable:4;
277 u32 rsvdz:28;
278 };
279};
280
281/* struct hv_monitor_page Layout */
282/* ------------------------------------------------------ */
283/* | 0 | TriggerState (4 bytes) | Rsvd1 (4 bytes) | */
284/* | 8 | TriggerGroup[0] | */
285/* | 10 | TriggerGroup[1] | */
286/* | 18 | TriggerGroup[2] | */
287/* | 20 | TriggerGroup[3] | */
288/* | 28 | Rsvd2[0] | */
289/* | 30 | Rsvd2[1] | */
290/* | 38 | Rsvd2[2] | */
291/* | 40 | NextCheckTime[0][0] | NextCheckTime[0][1] | */
292/* | ... | */
293/* | 240 | Latency[0][0..3] | */
294/* | 340 | Rsvz3[0] | */
295/* | 440 | Parameter[0][0] | */
296/* | 448 | Parameter[0][1] | */
297/* | ... | */
298/* | 840 | Rsvd4[0] | */
299/* ------------------------------------------------------ */
300struct hv_monitor_page {
301 union hv_monitor_trigger_state trigger_state;
302 u32 rsvdz1;
303
304 union hv_monitor_trigger_group trigger_group[4];
305 u64 rsvdz2[3];
306
307 s32 next_checktime[4][32];
308
309 u16 latency[4][32];
310 u64 rsvdz3[32];
311
312 struct hv_monitor_parameter parameter[4][32];
313
314 u8 rsvdz4[1984];
315};
316
317/* Declare the various hypercall operations. */
318enum hv_call_code {
319 HVCALL_POST_MESSAGE = 0x005c,
320 HVCALL_SIGNAL_EVENT = 0x005d,
321};
322
323/* Definition of the hv_post_message hypercall input structure. */
324struct hv_input_post_message {
325 union hv_connection_id connectionid;
326 u32 reserved;
327 enum hv_message_type message_type;
328 u32 payload_size;
329 u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
330};
331
K. Y. Srinivasanafbdc4a2011-05-12 19:34:29 -0700332/*
333 * Versioning definitions used for guests reporting themselves to the
334 * hypervisor, and visa versa.
335 */
336
337/* Version info reported by guest OS's */
338enum hv_guest_os_vendor {
339 HVGUESTOS_VENDOR_MICROSOFT = 0x0001
340};
341
342enum hv_guest_os_microsoft_ids {
343 HVGUESTOS_MICROSOFT_UNDEFINED = 0x00,
344 HVGUESTOS_MICROSOFT_MSDOS = 0x01,
345 HVGUESTOS_MICROSOFT_WINDOWS3X = 0x02,
346 HVGUESTOS_MICROSOFT_WINDOWS9X = 0x03,
347 HVGUESTOS_MICROSOFT_WINDOWSNT = 0x04,
348 HVGUESTOS_MICROSOFT_WINDOWSCE = 0x05
349};
350
351/*
352 * Declare the MSR used to identify the guest OS.
353 */
354#define HV_X64_MSR_GUEST_OS_ID 0x40000000
355
356union hv_x64_msr_guest_os_id_contents {
357 u64 as_uint64;
358 struct {
359 u64 build_number:16;
360 u64 service_version:8; /* Service Pack, etc. */
361 u64 minor_version:8;
362 u64 major_version:8;
363 u64 os_id:8; /* enum hv_guest_os_microsoft_ids (if Vendor=MS) */
364 u64 vendor_id:16; /* enum hv_guest_os_vendor */
365 };
366};
367
368/*
369 * Declare the MSR used to setup pages used to communicate with the hypervisor.
370 */
371#define HV_X64_MSR_HYPERCALL 0x40000001
372
373union hv_x64_msr_hypercall_contents {
374 u64 as_uint64;
375 struct {
376 u64 enable:1;
377 u64 reserved:11;
378 u64 guest_physical_address:52;
379 };
380};
381
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700382
383enum {
384 VMBUS_MESSAGE_CONNECTION_ID = 1,
385 VMBUS_MESSAGE_PORT_ID = 1,
386 VMBUS_EVENT_CONNECTION_ID = 2,
387 VMBUS_EVENT_PORT_ID = 2,
388 VMBUS_MONITOR_CONNECTION_ID = 3,
389 VMBUS_MONITOR_PORT_ID = 3,
390 VMBUS_MESSAGE_SINT = 2,
391};
392
393/* #defines */
394
395#define HV_PRESENT_BIT 0x80000000
396
K. Y. Srinivasan83ba0c42012-07-24 16:11:58 -0700397/*
398 * The guest OS needs to register the guest ID with the hypervisor.
399 * The guest ID is a 64 bit entity and the structure of this ID is
400 * specified in the Hyper-V specification:
401 *
402 * http://msdn.microsoft.com/en-us/library/windows/hardware/ff542653%28v=vs.85%29.aspx
403 *
404 * While the current guideline does not specify how Linux guest ID(s)
405 * need to be generated, our plan is to publish the guidelines for
406 * Linux and other guest operating systems that currently are hosted
407 * on Hyper-V. The implementation here conforms to this yet
408 * unpublished guidelines.
409 *
410 *
411 * Bit(s)
412 * 63 - Indicates if the OS is Open Source or not; 1 is Open Source
413 * 62:56 - Os Type; Linux is 0x100
414 * 55:48 - Distro specific identification
415 * 47:16 - Linux kernel version number
416 * 15:0 - Distro specific identification
417 *
418 *
419 */
420
421#define HV_LINUX_VENDOR_ID 0x8100
422
423/*
424 * Generate the guest ID based on the guideline described above.
425 */
426
427static inline __u64 generate_guest_id(__u8 d_info1, __u32 kernel_version,
428 __u16 d_info2)
429{
430 __u64 guest_id = 0;
431
432 guest_id = (((__u64)HV_LINUX_VENDOR_ID) << 48);
433 guest_id |= (((__u64)(d_info1)) << 48);
434 guest_id |= (((__u64)(kernel_version)) << 16);
435 guest_id |= ((__u64)(d_info2));
436
437 return guest_id;
438}
439
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700440
441#define HV_CPU_POWER_MANAGEMENT (1 << 0)
442#define HV_RECOMMENDATIONS_MAX 4
443
444#define HV_X64_MAX 5
445#define HV_CAPS_MAX 8
446
447
448#define HV_HYPERCALL_PARAM_ALIGN sizeof(u64)
449
450
451/* Service definitions */
452
453#define HV_SERVICE_PARENT_PORT (0)
454#define HV_SERVICE_PARENT_CONNECTION (0)
455
456#define HV_SERVICE_CONNECT_RESPONSE_SUCCESS (0)
457#define HV_SERVICE_CONNECT_RESPONSE_INVALID_PARAMETER (1)
458#define HV_SERVICE_CONNECT_RESPONSE_UNKNOWN_SERVICE (2)
459#define HV_SERVICE_CONNECT_RESPONSE_CONNECTION_REJECTED (3)
460
461#define HV_SERVICE_CONNECT_REQUEST_MESSAGE_ID (1)
462#define HV_SERVICE_CONNECT_RESPONSE_MESSAGE_ID (2)
463#define HV_SERVICE_DISCONNECT_REQUEST_MESSAGE_ID (3)
464#define HV_SERVICE_DISCONNECT_RESPONSE_MESSAGE_ID (4)
465#define HV_SERVICE_MAX_MESSAGE_ID (4)
466
467#define HV_SERVICE_PROTOCOL_VERSION (0x0010)
468#define HV_CONNECT_PAYLOAD_BYTE_COUNT 64
469
470/* #define VMBUS_REVISION_NUMBER 6 */
471
472/* Our local vmbus's port and connection id. Anything >0 is fine */
473/* #define VMBUS_PORT_ID 11 */
474
475/* 628180B8-308D-4c5e-B7DB-1BEB62E62EF4 */
K. Y. Srinivasan358d2ee2011-08-25 09:48:28 -0700476static const uuid_le VMBUS_SERVICE_ID = {
477 .b = {
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700478 0xb8, 0x80, 0x81, 0x62, 0x8d, 0x30, 0x5e, 0x4c,
479 0xb7, 0xdb, 0x1b, 0xeb, 0x62, 0xe6, 0x2e, 0xf4
480 },
481};
482
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700483
484
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700485struct hv_context {
486 /* We only support running on top of Hyper-V
487 * So at this point this really can only contain the Hyper-V ID
488 */
489 u64 guestid;
490
491 void *hypercall_page;
492
493 bool synic_initialized;
494
K. Y. Srinivasan14c1bf82012-02-02 16:56:51 -0800495 void *synic_message_page[NR_CPUS];
496 void *synic_event_page[NR_CPUS];
K. Y. Srinivasan917ea422012-12-01 06:46:47 -0800497 /*
498 * Hypervisor's notion of virtual processor ID is different from
499 * Linux' notion of CPU ID. This information can only be retrieved
500 * in the context of the calling CPU. Setup a map for easy access
501 * to this information:
502 *
503 * vp_index[a] is the Hyper-V's processor ID corresponding to
504 * Linux cpuid 'a'.
505 */
506 u32 vp_index[NR_CPUS];
K. Y. Srinivasandb11f122012-12-01 06:46:53 -0800507 /*
508 * Starting with win8, we can take channel interrupts on any CPU;
509 * we will manage the tasklet that handles events on a per CPU
510 * basis.
511 */
512 struct tasklet_struct *event_dpc[NR_CPUS];
K. Y. Srinivasan3a28fa32014-04-08 18:45:54 -0700513 /*
514 * To optimize the mapping of relid to channel, maintain
515 * per-cpu list of the channels based on their CPU affinity.
516 */
517 struct list_head percpu_list[NR_CPUS];
K. Y. Srinivasanb29ef352014-08-28 18:29:52 -0700518 /*
519 * buffer to post messages to the host.
520 */
521 void *post_msg_page[NR_CPUS];
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700522};
523
524extern struct hv_context hv_context;
525
Greg Kroah-Hartman1fdde162013-09-13 11:33:00 -0700526struct hv_ring_buffer_debug_info {
527 u32 current_interrupt_mask;
528 u32 current_read_index;
529 u32 current_write_index;
530 u32 bytes_avail_toread;
531 u32 bytes_avail_towrite;
532};
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700533
534/* Hv Interface */
535
536extern int hv_init(void);
537
538extern void hv_cleanup(void);
539
Dan Carpenter415f0a02012-03-28 09:58:07 +0300540extern int hv_post_message(union hv_connection_id connection_id,
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700541 enum hv_message_type message_type,
542 void *payload, size_t payload_size);
543
K. Y. Srinivasan1f422482012-12-01 06:46:42 -0800544extern u16 hv_signal_event(void *con_id);
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700545
Jason Wang2608fb62013-06-19 11:28:10 +0800546extern int hv_synic_alloc(void);
547
548extern void hv_synic_free(void);
549
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700550extern void hv_synic_init(void *irqarg);
551
552extern void hv_synic_cleanup(void *arg);
553
K. Y. Srinivasan5fbebb22012-12-01 06:46:58 -0800554/*
555 * Host version information.
556 */
557extern unsigned int host_info_eax;
558extern unsigned int host_info_ebx;
559extern unsigned int host_info_ecx;
560extern unsigned int host_info_edx;
K. Y. Srinivasan940655c2011-05-12 19:34:31 -0700561
562/* Interface */
563
564
565int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, void *buffer,
566 u32 buflen);
567
568void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info);
569
570int hv_ringbuffer_write(struct hv_ring_buffer_info *ring_info,
K. Y. Srinivasan011a7c32014-02-01 19:02:20 -0800571 struct kvec *kv_list,
572 u32 kv_count, bool *signal);
K. Y. Srinivasan940655c2011-05-12 19:34:31 -0700573
574int hv_ringbuffer_peek(struct hv_ring_buffer_info *ring_info, void *buffer,
575 u32 buflen);
576
577int hv_ringbuffer_read(struct hv_ring_buffer_info *ring_info,
578 void *buffer,
579 u32 buflen,
K. Y. Srinivasanc2b8e522012-12-01 06:46:57 -0800580 u32 offset, bool *signal);
K. Y. Srinivasan940655c2011-05-12 19:34:31 -0700581
K. Y. Srinivasan940655c2011-05-12 19:34:31 -0700582
K. Y. Srinivasan940655c2011-05-12 19:34:31 -0700583void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info,
584 struct hv_ring_buffer_debug_info *debug_info);
585
K. Y. Srinivasan6fdf3b22012-12-01 06:46:32 -0800586void hv_begin_read(struct hv_ring_buffer_info *rbi);
587
588u32 hv_end_read(struct hv_ring_buffer_info *rbi);
589
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700590/*
591 * Maximum channels is determined by the size of the interrupt page
592 * which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt
593 * and the other is receive endpoint interrupt
594 */
595#define MAX_NUM_CHANNELS ((PAGE_SIZE >> 1) << 3) /* 16348 channels */
596
597/* The value here must be in multiple of 32 */
598/* TODO: Need to make this configurable */
599#define MAX_NUM_CHANNELS_SUPPORTED 256
600
601
602enum vmbus_connect_state {
603 DISCONNECTED,
604 CONNECTING,
605 CONNECTED,
606 DISCONNECTING
607};
608
609#define MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT
610
611struct vmbus_connection {
612 enum vmbus_connect_state conn_state;
613
614 atomic_t next_gpadl_handle;
615
616 /*
617 * Represents channel interrupts. Each bit position represents a
618 * channel. When a channel sends an interrupt via VMBUS, it finds its
619 * bit in the sendInterruptPage, set it and calls Hv to generate a port
620 * event. The other end receives the port event and parse the
621 * recvInterruptPage to see which bit is set
622 */
623 void *int_page;
624 void *send_int_page;
625 void *recv_int_page;
626
627 /*
628 * 2 pages - 1st page for parent->child notification and 2nd
629 * is child->parent notification
630 */
Greg Kroah-Hartman8681db42013-09-13 11:32:55 -0700631 struct hv_monitor_page *monitor_pages[2];
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700632 struct list_head chn_msg_list;
633 spinlock_t channelmsg_lock;
634
635 /* List of channels */
636 struct list_head chn_list;
637 spinlock_t channel_lock;
638
639 struct workqueue_struct *work_queue;
640};
641
642
643struct vmbus_msginfo {
644 /* Bookkeeping stuff */
645 struct list_head msglist_entry;
646
647 /* The message itself */
648 unsigned char msg[0];
649};
650
651
652extern struct vmbus_connection vmbus_connection;
653
654/* General vmbus interface */
655
stephen hemminger1b9d48f2014-06-03 08:38:15 -0700656struct hv_device *vmbus_device_create(const uuid_le *type,
657 const uuid_le *instance,
658 struct vmbus_channel *channel);
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700659
K. Y. Srinivasan227942812011-09-08 07:24:13 -0700660int vmbus_device_register(struct hv_device *child_device_obj);
K. Y. Srinivasan696453b2011-09-08 07:24:14 -0700661void vmbus_device_unregister(struct hv_device *device_obj);
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700662
663/* static void */
664/* VmbusChildDeviceDestroy( */
665/* struct hv_device *); */
666
667struct vmbus_channel *relid2channel(u32 relid);
668
K. Y. Srinivasan93e5bd02011-12-12 09:29:17 -0800669void vmbus_free_channels(void);
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700670
671/* Connection interface */
672
673int vmbus_connect(void);
674
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700675int vmbus_post_msg(void *buffer, size_t buflen);
676
K. Y. Srinivasan21c3bef2012-12-01 06:46:43 -0800677int vmbus_set_event(struct vmbus_channel *channel);
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700678
679void vmbus_on_event(unsigned long data);
680
K. Y. Srinivasan013254762014-02-16 11:34:30 -0800681int hv_fcopy_init(struct hv_util_service *);
682void hv_fcopy_deinit(void);
683void hv_fcopy_onchannelcallback(void *);
684
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700685
K. Y. Srinivasan0f2a6612011-05-12 19:34:28 -0700686#endif /* _HYPERV_VMBUS_H */