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0f2a6619 S |
1 | /* |
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 | ||
43c698b9 S |
28 | #include <linux/list.h> |
29 | #include <asm/sync_bitops.h> | |
30 | #include <linux/atomic.h> | |
46a97191 | 31 | #include <linux/hyperv.h> |
43c698b9 | 32 | |
afbdc4a9 S |
33 | /* |
34 | * The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent | |
35 | * is set by CPUID(HVCPUID_VERSION_FEATURES). | |
36 | */ | |
37 | enum 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. */ | |
70 | enum 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 | ||
afbdc4a9 S |
104 | /* Define port identifier type. */ |
105 | union hv_port_id { | |
106 | u32 asu32; | |
107 | struct { | |
108 | u32 id:24; | |
109 | u32 reserved:8; | |
110 | } u ; | |
111 | }; | |
112 | ||
113 | /* Define port type. */ | |
114 | enum hv_port_type { | |
115 | HVPORT_MSG = 1, | |
116 | HVPORT_EVENT = 2, | |
117 | HVPORT_MONITOR = 3 | |
118 | }; | |
119 | ||
120 | /* Define port information structure. */ | |
121 | struct 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 | ||
144 | struct 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. */ | |
161 | union 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. */ | |
170 | struct 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. */ | |
182 | struct 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. */ | |
190 | struct 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. */ | |
201 | struct hv_message_page { | |
202 | struct hv_message sint_message[HV_SYNIC_SINT_COUNT]; | |
203 | }; | |
204 | ||
205 | /* Define the synthetic interrupt controller event flags format. */ | |
206 | union 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. */ | |
212 | struct hv_synic_event_flags_page { | |
213 | union hv_synic_event_flags sintevent_flags[HV_SYNIC_SINT_COUNT]; | |
214 | }; | |
215 | ||
216 | /* Define SynIC control register. */ | |
217 | union 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. */ | |
226 | union 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 */ | |
238 | union 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 */ | |
248 | union 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 */ | |
258 | union hv_monitor_trigger_group { | |
259 | u64 as_uint64; | |
260 | struct { | |
261 | u32 pending; | |
262 | u32 armed; | |
263 | }; | |
264 | }; | |
265 | ||
266 | struct hv_monitor_parameter { | |
267 | union hv_connection_id connectionid; | |
268 | u16 flagnumber; | |
269 | u16 rsvdz; | |
270 | }; | |
271 | ||
272 | union 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 | /* ------------------------------------------------------ */ | |
300 | struct 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. */ | |
318 | enum 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. */ | |
324 | struct 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 | ||
afbdc4a9 S |
332 | /* |
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 */ | |
338 | enum hv_guest_os_vendor { | |
339 | HVGUESTOS_VENDOR_MICROSOFT = 0x0001 | |
340 | }; | |
341 | ||
342 | enum 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 | ||
356 | union 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 | ||
373 | union 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 | ||
3645a917 S |
382 | |
383 | enum { | |
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 | ||
83ba0c4f S |
397 | /* |
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 | ||
427 | static 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 | ||
3645a917 S |
440 | |
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 */ | |
358d2ee2 S |
476 | static const uuid_le VMBUS_SERVICE_ID = { |
477 | .b = { | |
3645a917 S |
478 | 0xb8, 0x80, 0x81, 0x62, 0x8d, 0x30, 0x5e, 0x4c, |
479 | 0xb7, 0xdb, 0x1b, 0xeb, 0x62, 0xe6, 0x2e, 0xf4 | |
480 | }, | |
481 | }; | |
482 | ||
3645a917 S |
483 | |
484 | ||
3645a917 S |
485 | struct 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 | ||
14c1bf8a S |
495 | void *synic_message_page[NR_CPUS]; |
496 | void *synic_event_page[NR_CPUS]; | |
917ea427 S |
497 | /* |
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]; | |
db11f12a S |
507 | /* |
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]; | |
3a28fa35 S |
513 | /* |
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]; | |
b29ef354 S |
518 | /* |
519 | * buffer to post messages to the host. | |
520 | */ | |
521 | void *post_msg_page[NR_CPUS]; | |
3645a917 S |
522 | }; |
523 | ||
524 | extern struct hv_context hv_context; | |
525 | ||
1fdde16d GKH |
526 | struct 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 | }; | |
3645a917 S |
533 | |
534 | /* Hv Interface */ | |
535 | ||
536 | extern int hv_init(void); | |
537 | ||
538 | extern void hv_cleanup(void); | |
539 | ||
415f0a02 | 540 | extern int hv_post_message(union hv_connection_id connection_id, |
3645a917 S |
541 | enum hv_message_type message_type, |
542 | void *payload, size_t payload_size); | |
543 | ||
1f42248d | 544 | extern u16 hv_signal_event(void *con_id); |
3645a917 | 545 | |
2608fb65 JW |
546 | extern int hv_synic_alloc(void); |
547 | ||
548 | extern void hv_synic_free(void); | |
549 | ||
3645a917 S |
550 | extern void hv_synic_init(void *irqarg); |
551 | ||
552 | extern void hv_synic_cleanup(void *arg); | |
553 | ||
5fbebb2d S |
554 | /* |
555 | * Host version information. | |
556 | */ | |
557 | extern unsigned int host_info_eax; | |
558 | extern unsigned int host_info_ebx; | |
559 | extern unsigned int host_info_ecx; | |
560 | extern unsigned int host_info_edx; | |
940655c1 S |
561 | |
562 | /* Interface */ | |
563 | ||
564 | ||
565 | int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, void *buffer, | |
566 | u32 buflen); | |
567 | ||
568 | void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info); | |
569 | ||
570 | int hv_ringbuffer_write(struct hv_ring_buffer_info *ring_info, | |
011a7c3c S |
571 | struct kvec *kv_list, |
572 | u32 kv_count, bool *signal); | |
940655c1 S |
573 | |
574 | int hv_ringbuffer_peek(struct hv_ring_buffer_info *ring_info, void *buffer, | |
575 | u32 buflen); | |
576 | ||
577 | int hv_ringbuffer_read(struct hv_ring_buffer_info *ring_info, | |
578 | void *buffer, | |
579 | u32 buflen, | |
c2b8e520 | 580 | u32 offset, bool *signal); |
940655c1 | 581 | |
940655c1 | 582 | |
940655c1 S |
583 | void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info, |
584 | struct hv_ring_buffer_debug_info *debug_info); | |
585 | ||
6fdf3b21 S |
586 | void hv_begin_read(struct hv_ring_buffer_info *rbi); |
587 | ||
588 | u32 hv_end_read(struct hv_ring_buffer_info *rbi); | |
589 | ||
89b2ca47 S |
590 | /* |
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 | ||
602 | enum 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 | ||
611 | struct 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 | */ | |
8681db44 | 631 | struct hv_monitor_page *monitor_pages[2]; |
89b2ca47 S |
632 | 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 | ||
643 | struct vmbus_msginfo { | |
644 | /* Bookkeeping stuff */ | |
645 | struct list_head msglist_entry; | |
646 | ||
647 | /* The message itself */ | |
648 | unsigned char msg[0]; | |
649 | }; | |
650 | ||
651 | ||
652 | extern struct vmbus_connection vmbus_connection; | |
653 | ||
654 | /* General vmbus interface */ | |
655 | ||
1b9d48f2 | 656 | struct hv_device *vmbus_device_create(const uuid_le *type, |
657 | const uuid_le *instance, | |
658 | struct vmbus_channel *channel); | |
89b2ca47 | 659 | |
22794281 | 660 | int vmbus_device_register(struct hv_device *child_device_obj); |
696453ba | 661 | void vmbus_device_unregister(struct hv_device *device_obj); |
89b2ca47 S |
662 | |
663 | /* static void */ | |
664 | /* VmbusChildDeviceDestroy( */ | |
665 | /* struct hv_device *); */ | |
666 | ||
667 | struct vmbus_channel *relid2channel(u32 relid); | |
668 | ||
93e5bd06 | 669 | void vmbus_free_channels(void); |
89b2ca47 S |
670 | |
671 | /* Connection interface */ | |
672 | ||
673 | int vmbus_connect(void); | |
674 | ||
89b2ca47 S |
675 | int vmbus_post_msg(void *buffer, size_t buflen); |
676 | ||
21c3bef5 | 677 | int vmbus_set_event(struct vmbus_channel *channel); |
89b2ca47 S |
678 | |
679 | void vmbus_on_event(unsigned long data); | |
680 | ||
01325476 S |
681 | int hv_fcopy_init(struct hv_util_service *); |
682 | void hv_fcopy_deinit(void); | |
683 | void hv_fcopy_onchannelcallback(void *); | |
684 | ||
89b2ca47 | 685 | |
0f2a6619 | 686 | #endif /* _HYPERV_VMBUS_H */ |