blob: 4ebc796b4f33b83a5e6918c227d8c1bd437ed80e [file] [log] [blame]
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/*
K. Y. Srinivasanc0b200c2015-12-14 16:01:32 -080034 * Timeout for services such as KVP and fcopy.
35 */
36#define HV_UTIL_TIMEOUT 30
37
38/*
K. Y. Srinivasanafbdc4a2011-05-12 19:34:29 -070039 * The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent
40 * is set by CPUID(HVCPUID_VERSION_FEATURES).
41 */
42enum hv_cpuid_function {
43 HVCPUID_VERSION_FEATURES = 0x00000001,
44 HVCPUID_VENDOR_MAXFUNCTION = 0x40000000,
45 HVCPUID_INTERFACE = 0x40000001,
46
47 /*
48 * The remaining functions depend on the value of
49 * HVCPUID_INTERFACE
50 */
51 HVCPUID_VERSION = 0x40000002,
52 HVCPUID_FEATURES = 0x40000003,
53 HVCPUID_ENLIGHTENMENT_INFO = 0x40000004,
54 HVCPUID_IMPLEMENTATION_LIMITS = 0x40000005,
55};
56
Nick Meier96c1d052015-02-28 11:39:01 -080057#define HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE 0x400
58
59#define HV_X64_MSR_CRASH_P0 0x40000100
60#define HV_X64_MSR_CRASH_P1 0x40000101
61#define HV_X64_MSR_CRASH_P2 0x40000102
62#define HV_X64_MSR_CRASH_P3 0x40000103
63#define HV_X64_MSR_CRASH_P4 0x40000104
64#define HV_X64_MSR_CRASH_CTL 0x40000105
65
Nick Meier5ef5b692015-03-18 12:29:24 -070066#define HV_CRASH_CTL_CRASH_NOTIFY (1ULL << 63)
Nick Meier96c1d052015-02-28 11:39:01 -080067
K. Y. Srinivasanafbdc4a2011-05-12 19:34:29 -070068/* Define version of the synthetic interrupt controller. */
69#define HV_SYNIC_VERSION (1)
70
K. Y. Srinivasanafbdc4a2011-05-12 19:34:29 -070071#define HV_ANY_VP (0xFFFFFFFF)
72
73/* Define synthetic interrupt controller flag constants. */
74#define HV_EVENT_FLAGS_COUNT (256 * 8)
75#define HV_EVENT_FLAGS_BYTE_COUNT (256)
76#define HV_EVENT_FLAGS_DWORD_COUNT (256 / sizeof(u32))
77
K. Y. Srinivasanafbdc4a2011-05-12 19:34:29 -070078/* Define invalid partition identifier. */
79#define HV_PARTITION_ID_INVALID ((u64)0x0)
80
K. Y. Srinivasanafbdc4a2011-05-12 19:34:29 -070081/* Define port type. */
82enum hv_port_type {
83 HVPORT_MSG = 1,
84 HVPORT_EVENT = 2,
85 HVPORT_MONITOR = 3
86};
87
88/* Define port information structure. */
89struct hv_port_info {
90 enum hv_port_type port_type;
91 u32 padding;
92 union {
93 struct {
94 u32 target_sint;
95 u32 target_vp;
96 u64 rsvdz;
97 } message_port_info;
98 struct {
99 u32 target_sint;
100 u32 target_vp;
Nik Nybye26009a2015-08-01 16:08:18 -0700101 u16 base_flag_number;
K. Y. Srinivasanafbdc4a2011-05-12 19:34:29 -0700102 u16 flag_count;
103 u32 rsvdz;
104 } event_port_info;
105 struct {
106 u64 monitor_address;
107 u64 rsvdz;
108 } monitor_port_info;
109 };
110};
111
112struct hv_connection_info {
113 enum hv_port_type port_type;
114 u32 padding;
115 union {
116 struct {
117 u64 rsvdz;
118 } message_connection_info;
119 struct {
120 u64 rsvdz;
121 } event_connection_info;
122 struct {
123 u64 monitor_address;
124 } monitor_connection_info;
125 };
126};
127
K. Y. Srinivasan4061ed92015-01-09 23:54:32 -0800128/*
129 * Timer configuration register.
130 */
131union hv_timer_config {
132 u64 as_uint64;
133 struct {
134 u64 enable:1;
135 u64 periodic:1;
136 u64 lazy:1;
137 u64 auto_enable:1;
138 u64 reserved_z0:12;
139 u64 sintx:4;
140 u64 reserved_z1:44;
141 };
142};
143
K. Y. Srinivasanafbdc4a2011-05-12 19:34:29 -0700144/* Define the number of message buffers associated with each port. */
145#define HV_PORT_MESSAGE_BUFFER_COUNT (16)
146
K. Y. Srinivasanafbdc4a2011-05-12 19:34:29 -0700147/* Define the synthetic interrupt controller event flags format. */
148union hv_synic_event_flags {
149 u8 flags8[HV_EVENT_FLAGS_BYTE_COUNT];
150 u32 flags32[HV_EVENT_FLAGS_DWORD_COUNT];
151};
152
153/* Define the synthetic interrupt flags page layout. */
154struct hv_synic_event_flags_page {
155 union hv_synic_event_flags sintevent_flags[HV_SYNIC_SINT_COUNT];
156};
157
158/* Define SynIC control register. */
159union hv_synic_scontrol {
160 u64 as_uint64;
161 struct {
162 u64 enable:1;
163 u64 reserved:63;
164 };
165};
166
167/* Define synthetic interrupt source. */
168union hv_synic_sint {
169 u64 as_uint64;
170 struct {
171 u64 vector:8;
172 u64 reserved1:8;
173 u64 masked:1;
174 u64 auto_eoi:1;
175 u64 reserved2:46;
176 };
177};
178
179/* Define the format of the SIMP register */
180union hv_synic_simp {
181 u64 as_uint64;
182 struct {
183 u64 simp_enabled:1;
184 u64 preserved:11;
185 u64 base_simp_gpa:52;
186 };
187};
188
189/* Define the format of the SIEFP register */
190union hv_synic_siefp {
191 u64 as_uint64;
192 struct {
193 u64 siefp_enabled:1;
194 u64 preserved:11;
195 u64 base_siefp_gpa:52;
196 };
197};
198
199/* Definitions for the monitored notification facility */
200union hv_monitor_trigger_group {
201 u64 as_uint64;
202 struct {
203 u32 pending;
204 u32 armed;
205 };
206};
207
208struct hv_monitor_parameter {
209 union hv_connection_id connectionid;
210 u16 flagnumber;
211 u16 rsvdz;
212};
213
214union hv_monitor_trigger_state {
215 u32 asu32;
216
217 struct {
218 u32 group_enable:4;
219 u32 rsvdz:28;
220 };
221};
222
223/* struct hv_monitor_page Layout */
224/* ------------------------------------------------------ */
225/* | 0 | TriggerState (4 bytes) | Rsvd1 (4 bytes) | */
226/* | 8 | TriggerGroup[0] | */
227/* | 10 | TriggerGroup[1] | */
228/* | 18 | TriggerGroup[2] | */
229/* | 20 | TriggerGroup[3] | */
230/* | 28 | Rsvd2[0] | */
231/* | 30 | Rsvd2[1] | */
232/* | 38 | Rsvd2[2] | */
233/* | 40 | NextCheckTime[0][0] | NextCheckTime[0][1] | */
234/* | ... | */
235/* | 240 | Latency[0][0..3] | */
236/* | 340 | Rsvz3[0] | */
237/* | 440 | Parameter[0][0] | */
238/* | 448 | Parameter[0][1] | */
239/* | ... | */
240/* | 840 | Rsvd4[0] | */
241/* ------------------------------------------------------ */
242struct hv_monitor_page {
243 union hv_monitor_trigger_state trigger_state;
244 u32 rsvdz1;
245
246 union hv_monitor_trigger_group trigger_group[4];
247 u64 rsvdz2[3];
248
249 s32 next_checktime[4][32];
250
251 u16 latency[4][32];
252 u64 rsvdz3[32];
253
254 struct hv_monitor_parameter parameter[4][32];
255
256 u8 rsvdz4[1984];
257};
258
259/* Declare the various hypercall operations. */
260enum hv_call_code {
261 HVCALL_POST_MESSAGE = 0x005c,
262 HVCALL_SIGNAL_EVENT = 0x005d,
263};
264
265/* Definition of the hv_post_message hypercall input structure. */
266struct hv_input_post_message {
267 union hv_connection_id connectionid;
268 u32 reserved;
Andrey Smetanin7797dcf2015-11-30 19:22:13 +0300269 u32 message_type;
K. Y. Srinivasanafbdc4a2011-05-12 19:34:29 -0700270 u32 payload_size;
271 u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
272};
273
K. Y. Srinivasanafbdc4a2011-05-12 19:34:29 -0700274/*
275 * Versioning definitions used for guests reporting themselves to the
276 * hypervisor, and visa versa.
277 */
278
279/* Version info reported by guest OS's */
280enum hv_guest_os_vendor {
281 HVGUESTOS_VENDOR_MICROSOFT = 0x0001
282};
283
284enum hv_guest_os_microsoft_ids {
285 HVGUESTOS_MICROSOFT_UNDEFINED = 0x00,
286 HVGUESTOS_MICROSOFT_MSDOS = 0x01,
287 HVGUESTOS_MICROSOFT_WINDOWS3X = 0x02,
288 HVGUESTOS_MICROSOFT_WINDOWS9X = 0x03,
289 HVGUESTOS_MICROSOFT_WINDOWSNT = 0x04,
290 HVGUESTOS_MICROSOFT_WINDOWSCE = 0x05
291};
292
293/*
294 * Declare the MSR used to identify the guest OS.
295 */
296#define HV_X64_MSR_GUEST_OS_ID 0x40000000
297
298union hv_x64_msr_guest_os_id_contents {
299 u64 as_uint64;
300 struct {
301 u64 build_number:16;
302 u64 service_version:8; /* Service Pack, etc. */
303 u64 minor_version:8;
304 u64 major_version:8;
305 u64 os_id:8; /* enum hv_guest_os_microsoft_ids (if Vendor=MS) */
306 u64 vendor_id:16; /* enum hv_guest_os_vendor */
307 };
308};
309
310/*
311 * Declare the MSR used to setup pages used to communicate with the hypervisor.
312 */
313#define HV_X64_MSR_HYPERCALL 0x40000001
314
315union hv_x64_msr_hypercall_contents {
316 u64 as_uint64;
317 struct {
318 u64 enable:1;
319 u64 reserved:11;
320 u64 guest_physical_address:52;
321 };
322};
323
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700324
325enum {
326 VMBUS_MESSAGE_CONNECTION_ID = 1,
327 VMBUS_MESSAGE_PORT_ID = 1,
328 VMBUS_EVENT_CONNECTION_ID = 2,
329 VMBUS_EVENT_PORT_ID = 2,
330 VMBUS_MONITOR_CONNECTION_ID = 3,
331 VMBUS_MONITOR_PORT_ID = 3,
332 VMBUS_MESSAGE_SINT = 2,
333};
334
335/* #defines */
336
337#define HV_PRESENT_BIT 0x80000000
338
K. Y. Srinivasan83ba0c42012-07-24 16:11:58 -0700339/*
340 * The guest OS needs to register the guest ID with the hypervisor.
341 * The guest ID is a 64 bit entity and the structure of this ID is
342 * specified in the Hyper-V specification:
343 *
344 * http://msdn.microsoft.com/en-us/library/windows/hardware/ff542653%28v=vs.85%29.aspx
345 *
346 * While the current guideline does not specify how Linux guest ID(s)
347 * need to be generated, our plan is to publish the guidelines for
348 * Linux and other guest operating systems that currently are hosted
349 * on Hyper-V. The implementation here conforms to this yet
350 * unpublished guidelines.
351 *
352 *
353 * Bit(s)
354 * 63 - Indicates if the OS is Open Source or not; 1 is Open Source
355 * 62:56 - Os Type; Linux is 0x100
356 * 55:48 - Distro specific identification
357 * 47:16 - Linux kernel version number
358 * 15:0 - Distro specific identification
359 *
360 *
361 */
362
363#define HV_LINUX_VENDOR_ID 0x8100
364
365/*
366 * Generate the guest ID based on the guideline described above.
367 */
368
369static inline __u64 generate_guest_id(__u8 d_info1, __u32 kernel_version,
370 __u16 d_info2)
371{
372 __u64 guest_id = 0;
373
374 guest_id = (((__u64)HV_LINUX_VENDOR_ID) << 48);
375 guest_id |= (((__u64)(d_info1)) << 48);
376 guest_id |= (((__u64)(kernel_version)) << 16);
377 guest_id |= ((__u64)(d_info2));
378
379 return guest_id;
380}
381
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700382
383#define HV_CPU_POWER_MANAGEMENT (1 << 0)
384#define HV_RECOMMENDATIONS_MAX 4
385
386#define HV_X64_MAX 5
387#define HV_CAPS_MAX 8
388
389
390#define HV_HYPERCALL_PARAM_ALIGN sizeof(u64)
391
392
393/* Service definitions */
394
395#define HV_SERVICE_PARENT_PORT (0)
396#define HV_SERVICE_PARENT_CONNECTION (0)
397
398#define HV_SERVICE_CONNECT_RESPONSE_SUCCESS (0)
399#define HV_SERVICE_CONNECT_RESPONSE_INVALID_PARAMETER (1)
400#define HV_SERVICE_CONNECT_RESPONSE_UNKNOWN_SERVICE (2)
401#define HV_SERVICE_CONNECT_RESPONSE_CONNECTION_REJECTED (3)
402
403#define HV_SERVICE_CONNECT_REQUEST_MESSAGE_ID (1)
404#define HV_SERVICE_CONNECT_RESPONSE_MESSAGE_ID (2)
405#define HV_SERVICE_DISCONNECT_REQUEST_MESSAGE_ID (3)
406#define HV_SERVICE_DISCONNECT_RESPONSE_MESSAGE_ID (4)
407#define HV_SERVICE_MAX_MESSAGE_ID (4)
408
409#define HV_SERVICE_PROTOCOL_VERSION (0x0010)
410#define HV_CONNECT_PAYLOAD_BYTE_COUNT 64
411
412/* #define VMBUS_REVISION_NUMBER 6 */
413
414/* Our local vmbus's port and connection id. Anything >0 is fine */
415/* #define VMBUS_PORT_ID 11 */
416
417/* 628180B8-308D-4c5e-B7DB-1BEB62E62EF4 */
K. Y. Srinivasan358d2ee2011-08-25 09:48:28 -0700418static const uuid_le VMBUS_SERVICE_ID = {
419 .b = {
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700420 0xb8, 0x80, 0x81, 0x62, 0x8d, 0x30, 0x5e, 0x4c,
421 0xb7, 0xdb, 0x1b, 0xeb, 0x62, 0xe6, 0x2e, 0xf4
422 },
423};
424
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700425
426
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700427struct hv_context {
428 /* We only support running on top of Hyper-V
429 * So at this point this really can only contain the Hyper-V ID
430 */
431 u64 guestid;
432
433 void *hypercall_page;
K. Y. Srinivasanca9357b2015-08-05 00:52:42 -0700434 void *tsc_page;
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700435
436 bool synic_initialized;
437
K. Y. Srinivasan14c1bf82012-02-02 16:56:51 -0800438 void *synic_message_page[NR_CPUS];
439 void *synic_event_page[NR_CPUS];
K. Y. Srinivasan917ea422012-12-01 06:46:47 -0800440 /*
441 * Hypervisor's notion of virtual processor ID is different from
442 * Linux' notion of CPU ID. This information can only be retrieved
443 * in the context of the calling CPU. Setup a map for easy access
444 * to this information:
445 *
446 * vp_index[a] is the Hyper-V's processor ID corresponding to
447 * Linux cpuid 'a'.
448 */
449 u32 vp_index[NR_CPUS];
K. Y. Srinivasandb11f122012-12-01 06:46:53 -0800450 /*
451 * Starting with win8, we can take channel interrupts on any CPU;
452 * we will manage the tasklet that handles events on a per CPU
453 * basis.
454 */
455 struct tasklet_struct *event_dpc[NR_CPUS];
K. Y. Srinivasan3a28fa32014-04-08 18:45:54 -0700456 /*
457 * To optimize the mapping of relid to channel, maintain
458 * per-cpu list of the channels based on their CPU affinity.
459 */
460 struct list_head percpu_list[NR_CPUS];
K. Y. Srinivasanb29ef352014-08-28 18:29:52 -0700461 /*
462 * buffer to post messages to the host.
463 */
464 void *post_msg_page[NR_CPUS];
K. Y. Srinivasan4061ed92015-01-09 23:54:32 -0800465 /*
466 * Support PV clockevent device.
467 */
468 struct clock_event_device *clk_evt[NR_CPUS];
K. Y. Srinivasan9f01ec532015-08-05 00:52:38 -0700469 /*
470 * To manage allocations in a NUMA node.
471 * Array indexed by numa node ID.
472 */
473 struct cpumask *hv_numa_map;
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700474};
475
476extern struct hv_context hv_context;
477
K. Y. Srinivasanca9357b2015-08-05 00:52:42 -0700478struct ms_hyperv_tsc_page {
479 volatile u32 tsc_sequence;
480 u32 reserved1;
481 volatile u64 tsc_scale;
482 volatile s64 tsc_offset;
483 u64 reserved2[509];
484};
485
Greg Kroah-Hartman1fdde162013-09-13 11:33:00 -0700486struct hv_ring_buffer_debug_info {
487 u32 current_interrupt_mask;
488 u32 current_read_index;
489 u32 current_write_index;
490 u32 bytes_avail_toread;
491 u32 bytes_avail_towrite;
492};
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700493
494/* Hv Interface */
495
496extern int hv_init(void);
497
498extern void hv_cleanup(void);
499
Dan Carpenter415f0a02012-03-28 09:58:07 +0300500extern int hv_post_message(union hv_connection_id connection_id,
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700501 enum hv_message_type message_type,
502 void *payload, size_t payload_size);
503
Jake Oshinsa1083932015-12-14 16:01:40 -0800504extern int hv_signal_event(void *con_id);
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700505
Jason Wang2608fb62013-06-19 11:28:10 +0800506extern int hv_synic_alloc(void);
507
508extern void hv_synic_free(void);
509
K. Y. Srinivasan3645a912011-05-12 19:34:30 -0700510extern void hv_synic_init(void *irqarg);
511
512extern void hv_synic_cleanup(void *arg);
513
Vitaly Kuznetsove0867482015-02-27 11:25:57 -0800514extern void hv_synic_clockevents_cleanup(void);
515
K. Y. Srinivasan5fbebb22012-12-01 06:46:58 -0800516/*
517 * Host version information.
518 */
519extern unsigned int host_info_eax;
520extern unsigned int host_info_ebx;
521extern unsigned int host_info_ecx;
522extern unsigned int host_info_edx;
K. Y. Srinivasan940655c2011-05-12 19:34:31 -0700523
524/* Interface */
525
526
527int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, void *buffer,
528 u32 buflen);
529
530void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info);
531
532int hv_ringbuffer_write(struct hv_ring_buffer_info *ring_info,
K. Y. Srinivasan011a7c32014-02-01 19:02:20 -0800533 struct kvec *kv_list,
534 u32 kv_count, bool *signal);
K. Y. Srinivasan940655c2011-05-12 19:34:31 -0700535
Vitaly Kuznetsov940b68e2015-12-14 19:02:01 -0800536int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info,
537 void *buffer, u32 buflen, u32 *buffer_actual_len,
538 u64 *requestid, bool *signal, bool raw);
K. Y. Srinivasan940655c2011-05-12 19:34:31 -0700539
K. Y. Srinivasan940655c2011-05-12 19:34:31 -0700540void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info,
541 struct hv_ring_buffer_debug_info *debug_info);
542
K. Y. Srinivasan6fdf3b22012-12-01 06:46:32 -0800543void hv_begin_read(struct hv_ring_buffer_info *rbi);
544
545u32 hv_end_read(struct hv_ring_buffer_info *rbi);
546
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700547/*
548 * Maximum channels is determined by the size of the interrupt page
549 * which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt
550 * and the other is receive endpoint interrupt
551 */
552#define MAX_NUM_CHANNELS ((PAGE_SIZE >> 1) << 3) /* 16348 channels */
553
554/* The value here must be in multiple of 32 */
555/* TODO: Need to make this configurable */
556#define MAX_NUM_CHANNELS_SUPPORTED 256
557
558
559enum vmbus_connect_state {
560 DISCONNECTED,
561 CONNECTING,
562 CONNECTED,
563 DISCONNECTING
564};
565
566#define MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT
567
568struct vmbus_connection {
569 enum vmbus_connect_state conn_state;
570
571 atomic_t next_gpadl_handle;
572
K. Y. Srinivasan2db84ef2015-04-22 21:31:32 -0700573 struct completion unload_event;
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700574 /*
575 * Represents channel interrupts. Each bit position represents a
576 * channel. When a channel sends an interrupt via VMBUS, it finds its
577 * bit in the sendInterruptPage, set it and calls Hv to generate a port
578 * event. The other end receives the port event and parse the
579 * recvInterruptPage to see which bit is set
580 */
581 void *int_page;
582 void *send_int_page;
583 void *recv_int_page;
584
585 /*
586 * 2 pages - 1st page for parent->child notification and 2nd
587 * is child->parent notification
588 */
Greg Kroah-Hartman8681db42013-09-13 11:32:55 -0700589 struct hv_monitor_page *monitor_pages[2];
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700590 struct list_head chn_msg_list;
591 spinlock_t channelmsg_lock;
592
593 /* List of channels */
594 struct list_head chn_list;
Dexuan Cuid6f591e2015-12-14 16:01:51 -0800595 struct mutex channel_mutex;
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700596
597 struct workqueue_struct *work_queue;
598};
599
600
601struct vmbus_msginfo {
602 /* Bookkeeping stuff */
603 struct list_head msglist_entry;
604
605 /* The message itself */
606 unsigned char msg[0];
607};
608
609
610extern struct vmbus_connection vmbus_connection;
611
Dexuan Cui652594c2015-03-27 09:10:08 -0700612enum vmbus_message_handler_type {
613 /* The related handler can sleep. */
614 VMHT_BLOCKING = 0,
615
616 /* The related handler must NOT sleep. */
617 VMHT_NON_BLOCKING = 1,
618};
619
620struct vmbus_channel_message_table_entry {
621 enum vmbus_channel_message_type message_type;
622 enum vmbus_message_handler_type handler_type;
623 void (*message_handler)(struct vmbus_channel_message_header *msg);
624};
625
626extern struct vmbus_channel_message_table_entry
627 channel_message_table[CHANNELMSG_COUNT];
628
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700629/* General vmbus interface */
630
stephen hemminger1b9d48f2014-06-03 08:38:15 -0700631struct hv_device *vmbus_device_create(const uuid_le *type,
632 const uuid_le *instance,
633 struct vmbus_channel *channel);
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700634
K. Y. Srinivasan227942812011-09-08 07:24:13 -0700635int vmbus_device_register(struct hv_device *child_device_obj);
K. Y. Srinivasan696453b2011-09-08 07:24:14 -0700636void vmbus_device_unregister(struct hv_device *device_obj);
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700637
638/* static void */
639/* VmbusChildDeviceDestroy( */
640/* struct hv_device *); */
641
Dexuan Cuid43e2fe2015-03-27 09:10:09 -0700642struct vmbus_channel *relid2channel(u32 relid);
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700643
K. Y. Srinivasan93e5bd02011-12-12 09:29:17 -0800644void vmbus_free_channels(void);
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700645
646/* Connection interface */
647
648int vmbus_connect(void);
Vitaly Kuznetsov09a19622015-02-27 11:25:54 -0800649void vmbus_disconnect(void);
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700650
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700651int vmbus_post_msg(void *buffer, size_t buflen);
652
K. Y. Srinivasan21c3bef2012-12-01 06:46:43 -0800653int vmbus_set_event(struct vmbus_channel *channel);
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700654
655void vmbus_on_event(unsigned long data);
656
Vitaly Kuznetsov3647a832015-04-11 18:07:39 -0700657int hv_kvp_init(struct hv_util_service *);
658void hv_kvp_deinit(void);
659void hv_kvp_onchannelcallback(void *);
660
661int hv_vss_init(struct hv_util_service *);
662void hv_vss_deinit(void);
663void hv_vss_onchannelcallback(void *);
664
K. Y. Srinivasan013254762014-02-16 11:34:30 -0800665int hv_fcopy_init(struct hv_util_service *);
666void hv_fcopy_deinit(void);
667void hv_fcopy_onchannelcallback(void *);
K. Y. Srinivasan2db84ef2015-04-22 21:31:32 -0700668void vmbus_initiate_unload(void);
K. Y. Srinivasan013254762014-02-16 11:34:30 -0800669
Vitaly Kuznetsov8efe78f2015-04-11 18:07:41 -0700670static inline void hv_poll_channel(struct vmbus_channel *channel,
671 void (*cb)(void *))
672{
673 if (!channel)
674 return;
675
Olaf Hering3cace4a2015-12-14 16:01:33 -0800676 smp_call_function_single(channel->target_cpu, cb, channel, true);
Vitaly Kuznetsov8efe78f2015-04-11 18:07:41 -0700677}
K. Y. Srinivasan89b2ca42011-05-12 19:34:32 -0700678
Vitaly Kuznetsov636c88d2015-04-11 18:07:46 -0700679enum hvutil_device_state {
680 HVUTIL_DEVICE_INIT = 0, /* driver is loaded, waiting for userspace */
681 HVUTIL_READY, /* userspace is registered */
682 HVUTIL_HOSTMSG_RECEIVED, /* message from the host was received */
683 HVUTIL_USERSPACE_REQ, /* request to userspace was sent */
684 HVUTIL_USERSPACE_RECV, /* reply from userspace was received */
685 HVUTIL_DEVICE_DYING, /* driver unload is in progress */
686};
687
K. Y. Srinivasan0f2a6612011-05-12 19:34:28 -0700688#endif /* _HYPERV_VMBUS_H */