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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 | |
c0b200cf S |
33 | /* |
34 | * Timeout for services such as KVP and fcopy. | |
35 | */ | |
36 | #define HV_UTIL_TIMEOUT 30 | |
37 | ||
afbdc4a9 S |
38 | /* |
39 | * The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent | |
40 | * is set by CPUID(HVCPUID_VERSION_FEATURES). | |
41 | */ | |
42 | enum 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 | ||
96c1d058 NM |
57 | #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 | ||
5ef5b692 | 66 | #define HV_CRASH_CTL_CRASH_NOTIFY (1ULL << 63) |
96c1d058 | 67 | |
afbdc4a9 S |
68 | /* Define version of the synthetic interrupt controller. */ |
69 | #define HV_SYNIC_VERSION (1) | |
70 | ||
afbdc4a9 S |
71 | #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 | ||
afbdc4a9 S |
78 | /* Define invalid partition identifier. */ |
79 | #define HV_PARTITION_ID_INVALID ((u64)0x0) | |
80 | ||
afbdc4a9 S |
81 | /* Define port type. */ |
82 | enum hv_port_type { | |
83 | HVPORT_MSG = 1, | |
84 | HVPORT_EVENT = 2, | |
85 | HVPORT_MONITOR = 3 | |
86 | }; | |
87 | ||
88 | /* Define port information structure. */ | |
89 | struct 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; | |
e26009aa | 101 | u16 base_flag_number; |
afbdc4a9 S |
102 | 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 | ||
112 | struct 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 | ||
4061ed9e S |
128 | /* |
129 | * Timer configuration register. | |
130 | */ | |
131 | union 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 | ||
afbdc4a9 S |
144 | /* Define the number of message buffers associated with each port. */ |
145 | #define HV_PORT_MESSAGE_BUFFER_COUNT (16) | |
146 | ||
afbdc4a9 S |
147 | /* Define the synthetic interrupt controller event flags format. */ |
148 | union 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. */ | |
154 | struct hv_synic_event_flags_page { | |
155 | union hv_synic_event_flags sintevent_flags[HV_SYNIC_SINT_COUNT]; | |
156 | }; | |
157 | ||
158 | /* Define SynIC control register. */ | |
159 | union 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. */ | |
168 | union 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 */ | |
180 | union 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 */ | |
190 | union 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 */ | |
200 | union hv_monitor_trigger_group { | |
201 | u64 as_uint64; | |
202 | struct { | |
203 | u32 pending; | |
204 | u32 armed; | |
205 | }; | |
206 | }; | |
207 | ||
208 | struct hv_monitor_parameter { | |
209 | union hv_connection_id connectionid; | |
210 | u16 flagnumber; | |
211 | u16 rsvdz; | |
212 | }; | |
213 | ||
214 | union 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 | /* ------------------------------------------------------ */ | |
242 | struct 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 | ||
afbdc4a9 S |
259 | /* Definition of the hv_post_message hypercall input structure. */ |
260 | struct hv_input_post_message { | |
261 | union hv_connection_id connectionid; | |
262 | u32 reserved; | |
7797dcf6 | 263 | u32 message_type; |
afbdc4a9 S |
264 | u32 payload_size; |
265 | u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT]; | |
266 | }; | |
267 | ||
afbdc4a9 S |
268 | /* |
269 | * Versioning definitions used for guests reporting themselves to the | |
270 | * hypervisor, and visa versa. | |
271 | */ | |
272 | ||
273 | /* Version info reported by guest OS's */ | |
274 | enum hv_guest_os_vendor { | |
275 | HVGUESTOS_VENDOR_MICROSOFT = 0x0001 | |
276 | }; | |
277 | ||
278 | enum hv_guest_os_microsoft_ids { | |
279 | HVGUESTOS_MICROSOFT_UNDEFINED = 0x00, | |
280 | HVGUESTOS_MICROSOFT_MSDOS = 0x01, | |
281 | HVGUESTOS_MICROSOFT_WINDOWS3X = 0x02, | |
282 | HVGUESTOS_MICROSOFT_WINDOWS9X = 0x03, | |
283 | HVGUESTOS_MICROSOFT_WINDOWSNT = 0x04, | |
284 | HVGUESTOS_MICROSOFT_WINDOWSCE = 0x05 | |
285 | }; | |
286 | ||
287 | /* | |
288 | * Declare the MSR used to identify the guest OS. | |
289 | */ | |
290 | #define HV_X64_MSR_GUEST_OS_ID 0x40000000 | |
291 | ||
292 | union hv_x64_msr_guest_os_id_contents { | |
293 | u64 as_uint64; | |
294 | struct { | |
295 | u64 build_number:16; | |
296 | u64 service_version:8; /* Service Pack, etc. */ | |
297 | u64 minor_version:8; | |
298 | u64 major_version:8; | |
299 | u64 os_id:8; /* enum hv_guest_os_microsoft_ids (if Vendor=MS) */ | |
300 | u64 vendor_id:16; /* enum hv_guest_os_vendor */ | |
301 | }; | |
302 | }; | |
303 | ||
304 | /* | |
305 | * Declare the MSR used to setup pages used to communicate with the hypervisor. | |
306 | */ | |
307 | #define HV_X64_MSR_HYPERCALL 0x40000001 | |
308 | ||
309 | union hv_x64_msr_hypercall_contents { | |
310 | u64 as_uint64; | |
311 | struct { | |
312 | u64 enable:1; | |
313 | u64 reserved:11; | |
314 | u64 guest_physical_address:52; | |
315 | }; | |
316 | }; | |
317 | ||
3645a917 S |
318 | |
319 | enum { | |
320 | VMBUS_MESSAGE_CONNECTION_ID = 1, | |
321 | VMBUS_MESSAGE_PORT_ID = 1, | |
322 | VMBUS_EVENT_CONNECTION_ID = 2, | |
323 | VMBUS_EVENT_PORT_ID = 2, | |
324 | VMBUS_MONITOR_CONNECTION_ID = 3, | |
325 | VMBUS_MONITOR_PORT_ID = 3, | |
326 | VMBUS_MESSAGE_SINT = 2, | |
327 | }; | |
328 | ||
329 | /* #defines */ | |
330 | ||
331 | #define HV_PRESENT_BIT 0x80000000 | |
332 | ||
83ba0c4f S |
333 | /* |
334 | * The guest OS needs to register the guest ID with the hypervisor. | |
335 | * The guest ID is a 64 bit entity and the structure of this ID is | |
336 | * specified in the Hyper-V specification: | |
337 | * | |
338 | * http://msdn.microsoft.com/en-us/library/windows/hardware/ff542653%28v=vs.85%29.aspx | |
339 | * | |
340 | * While the current guideline does not specify how Linux guest ID(s) | |
341 | * need to be generated, our plan is to publish the guidelines for | |
342 | * Linux and other guest operating systems that currently are hosted | |
343 | * on Hyper-V. The implementation here conforms to this yet | |
344 | * unpublished guidelines. | |
345 | * | |
346 | * | |
347 | * Bit(s) | |
348 | * 63 - Indicates if the OS is Open Source or not; 1 is Open Source | |
349 | * 62:56 - Os Type; Linux is 0x100 | |
350 | * 55:48 - Distro specific identification | |
351 | * 47:16 - Linux kernel version number | |
352 | * 15:0 - Distro specific identification | |
353 | * | |
354 | * | |
355 | */ | |
356 | ||
357 | #define HV_LINUX_VENDOR_ID 0x8100 | |
358 | ||
359 | /* | |
360 | * Generate the guest ID based on the guideline described above. | |
361 | */ | |
362 | ||
363 | static inline __u64 generate_guest_id(__u8 d_info1, __u32 kernel_version, | |
364 | __u16 d_info2) | |
365 | { | |
366 | __u64 guest_id = 0; | |
367 | ||
368 | guest_id = (((__u64)HV_LINUX_VENDOR_ID) << 48); | |
369 | guest_id |= (((__u64)(d_info1)) << 48); | |
370 | guest_id |= (((__u64)(kernel_version)) << 16); | |
371 | guest_id |= ((__u64)(d_info2)); | |
372 | ||
373 | return guest_id; | |
374 | } | |
375 | ||
3645a917 S |
376 | |
377 | #define HV_CPU_POWER_MANAGEMENT (1 << 0) | |
378 | #define HV_RECOMMENDATIONS_MAX 4 | |
379 | ||
380 | #define HV_X64_MAX 5 | |
381 | #define HV_CAPS_MAX 8 | |
382 | ||
383 | ||
384 | #define HV_HYPERCALL_PARAM_ALIGN sizeof(u64) | |
385 | ||
386 | ||
387 | /* Service definitions */ | |
388 | ||
389 | #define HV_SERVICE_PARENT_PORT (0) | |
390 | #define HV_SERVICE_PARENT_CONNECTION (0) | |
391 | ||
392 | #define HV_SERVICE_CONNECT_RESPONSE_SUCCESS (0) | |
393 | #define HV_SERVICE_CONNECT_RESPONSE_INVALID_PARAMETER (1) | |
394 | #define HV_SERVICE_CONNECT_RESPONSE_UNKNOWN_SERVICE (2) | |
395 | #define HV_SERVICE_CONNECT_RESPONSE_CONNECTION_REJECTED (3) | |
396 | ||
397 | #define HV_SERVICE_CONNECT_REQUEST_MESSAGE_ID (1) | |
398 | #define HV_SERVICE_CONNECT_RESPONSE_MESSAGE_ID (2) | |
399 | #define HV_SERVICE_DISCONNECT_REQUEST_MESSAGE_ID (3) | |
400 | #define HV_SERVICE_DISCONNECT_RESPONSE_MESSAGE_ID (4) | |
401 | #define HV_SERVICE_MAX_MESSAGE_ID (4) | |
402 | ||
403 | #define HV_SERVICE_PROTOCOL_VERSION (0x0010) | |
404 | #define HV_CONNECT_PAYLOAD_BYTE_COUNT 64 | |
405 | ||
406 | /* #define VMBUS_REVISION_NUMBER 6 */ | |
407 | ||
408 | /* Our local vmbus's port and connection id. Anything >0 is fine */ | |
409 | /* #define VMBUS_PORT_ID 11 */ | |
410 | ||
411 | /* 628180B8-308D-4c5e-B7DB-1BEB62E62EF4 */ | |
358d2ee2 S |
412 | static const uuid_le VMBUS_SERVICE_ID = { |
413 | .b = { | |
3645a917 S |
414 | 0xb8, 0x80, 0x81, 0x62, 0x8d, 0x30, 0x5e, 0x4c, |
415 | 0xb7, 0xdb, 0x1b, 0xeb, 0x62, 0xe6, 0x2e, 0xf4 | |
416 | }, | |
417 | }; | |
418 | ||
3645a917 S |
419 | |
420 | ||
3645a917 S |
421 | struct hv_context { |
422 | /* We only support running on top of Hyper-V | |
423 | * So at this point this really can only contain the Hyper-V ID | |
424 | */ | |
425 | u64 guestid; | |
426 | ||
427 | void *hypercall_page; | |
ca9357bd | 428 | void *tsc_page; |
3645a917 S |
429 | |
430 | bool synic_initialized; | |
431 | ||
14c1bf8a S |
432 | void *synic_message_page[NR_CPUS]; |
433 | void *synic_event_page[NR_CPUS]; | |
917ea427 S |
434 | /* |
435 | * Hypervisor's notion of virtual processor ID is different from | |
436 | * Linux' notion of CPU ID. This information can only be retrieved | |
437 | * in the context of the calling CPU. Setup a map for easy access | |
438 | * to this information: | |
439 | * | |
440 | * vp_index[a] is the Hyper-V's processor ID corresponding to | |
441 | * Linux cpuid 'a'. | |
442 | */ | |
443 | u32 vp_index[NR_CPUS]; | |
db11f12a S |
444 | /* |
445 | * Starting with win8, we can take channel interrupts on any CPU; | |
d81274aa | 446 | * we will manage the tasklet that handles events messages on a per CPU |
db11f12a S |
447 | * basis. |
448 | */ | |
449 | struct tasklet_struct *event_dpc[NR_CPUS]; | |
d81274aa | 450 | struct tasklet_struct *msg_dpc[NR_CPUS]; |
3a28fa35 S |
451 | /* |
452 | * To optimize the mapping of relid to channel, maintain | |
453 | * per-cpu list of the channels based on their CPU affinity. | |
454 | */ | |
455 | struct list_head percpu_list[NR_CPUS]; | |
b29ef354 S |
456 | /* |
457 | * buffer to post messages to the host. | |
458 | */ | |
459 | void *post_msg_page[NR_CPUS]; | |
4061ed9e S |
460 | /* |
461 | * Support PV clockevent device. | |
462 | */ | |
463 | struct clock_event_device *clk_evt[NR_CPUS]; | |
9f01ec53 S |
464 | /* |
465 | * To manage allocations in a NUMA node. | |
466 | * Array indexed by numa node ID. | |
467 | */ | |
468 | struct cpumask *hv_numa_map; | |
3645a917 S |
469 | }; |
470 | ||
471 | extern struct hv_context hv_context; | |
472 | ||
ca9357bd S |
473 | struct ms_hyperv_tsc_page { |
474 | volatile u32 tsc_sequence; | |
475 | u32 reserved1; | |
476 | volatile u64 tsc_scale; | |
477 | volatile s64 tsc_offset; | |
478 | u64 reserved2[509]; | |
479 | }; | |
480 | ||
1fdde16d GKH |
481 | struct hv_ring_buffer_debug_info { |
482 | u32 current_interrupt_mask; | |
483 | u32 current_read_index; | |
484 | u32 current_write_index; | |
485 | u32 bytes_avail_toread; | |
486 | u32 bytes_avail_towrite; | |
487 | }; | |
3645a917 S |
488 | |
489 | /* Hv Interface */ | |
490 | ||
491 | extern int hv_init(void); | |
492 | ||
493 | extern void hv_cleanup(void); | |
494 | ||
415f0a02 | 495 | extern int hv_post_message(union hv_connection_id connection_id, |
3645a917 S |
496 | enum hv_message_type message_type, |
497 | void *payload, size_t payload_size); | |
498 | ||
2608fb65 JW |
499 | extern int hv_synic_alloc(void); |
500 | ||
501 | extern void hv_synic_free(void); | |
502 | ||
3645a917 S |
503 | extern void hv_synic_init(void *irqarg); |
504 | ||
505 | extern void hv_synic_cleanup(void *arg); | |
506 | ||
e086748c VK |
507 | extern void hv_synic_clockevents_cleanup(void); |
508 | ||
5fbebb2d S |
509 | /* |
510 | * Host version information. | |
511 | */ | |
512 | extern unsigned int host_info_eax; | |
513 | extern unsigned int host_info_ebx; | |
514 | extern unsigned int host_info_ecx; | |
515 | extern unsigned int host_info_edx; | |
940655c1 S |
516 | |
517 | /* Interface */ | |
518 | ||
519 | ||
520 | int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, void *buffer, | |
521 | u32 buflen); | |
522 | ||
523 | void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info); | |
524 | ||
525 | int hv_ringbuffer_write(struct hv_ring_buffer_info *ring_info, | |
011a7c3c | 526 | struct kvec *kv_list, |
fe760e4d | 527 | u32 kv_count, bool *signal, bool lock); |
940655c1 | 528 | |
940b68e2 VK |
529 | int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info, |
530 | void *buffer, u32 buflen, u32 *buffer_actual_len, | |
531 | u64 *requestid, bool *signal, bool raw); | |
940655c1 | 532 | |
940655c1 S |
533 | void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info, |
534 | struct hv_ring_buffer_debug_info *debug_info); | |
535 | ||
6fdf3b21 S |
536 | void hv_begin_read(struct hv_ring_buffer_info *rbi); |
537 | ||
538 | u32 hv_end_read(struct hv_ring_buffer_info *rbi); | |
539 | ||
89b2ca47 S |
540 | /* |
541 | * Maximum channels is determined by the size of the interrupt page | |
542 | * which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt | |
543 | * and the other is receive endpoint interrupt | |
544 | */ | |
545 | #define MAX_NUM_CHANNELS ((PAGE_SIZE >> 1) << 3) /* 16348 channels */ | |
546 | ||
547 | /* The value here must be in multiple of 32 */ | |
548 | /* TODO: Need to make this configurable */ | |
549 | #define MAX_NUM_CHANNELS_SUPPORTED 256 | |
550 | ||
551 | ||
552 | enum vmbus_connect_state { | |
553 | DISCONNECTED, | |
554 | CONNECTING, | |
555 | CONNECTED, | |
556 | DISCONNECTING | |
557 | }; | |
558 | ||
559 | #define MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT | |
560 | ||
561 | struct vmbus_connection { | |
562 | enum vmbus_connect_state conn_state; | |
563 | ||
564 | atomic_t next_gpadl_handle; | |
565 | ||
2db84eff | 566 | struct completion unload_event; |
89b2ca47 S |
567 | /* |
568 | * Represents channel interrupts. Each bit position represents a | |
569 | * channel. When a channel sends an interrupt via VMBUS, it finds its | |
570 | * bit in the sendInterruptPage, set it and calls Hv to generate a port | |
571 | * event. The other end receives the port event and parse the | |
572 | * recvInterruptPage to see which bit is set | |
573 | */ | |
574 | void *int_page; | |
575 | void *send_int_page; | |
576 | void *recv_int_page; | |
577 | ||
578 | /* | |
579 | * 2 pages - 1st page for parent->child notification and 2nd | |
580 | * is child->parent notification | |
581 | */ | |
8681db44 | 582 | struct hv_monitor_page *monitor_pages[2]; |
89b2ca47 S |
583 | struct list_head chn_msg_list; |
584 | spinlock_t channelmsg_lock; | |
585 | ||
586 | /* List of channels */ | |
587 | struct list_head chn_list; | |
d6f591e3 | 588 | struct mutex channel_mutex; |
89b2ca47 S |
589 | |
590 | struct workqueue_struct *work_queue; | |
591 | }; | |
592 | ||
593 | ||
594 | struct vmbus_msginfo { | |
595 | /* Bookkeeping stuff */ | |
596 | struct list_head msglist_entry; | |
597 | ||
598 | /* The message itself */ | |
599 | unsigned char msg[0]; | |
600 | }; | |
601 | ||
602 | ||
603 | extern struct vmbus_connection vmbus_connection; | |
604 | ||
652594c7 DC |
605 | enum vmbus_message_handler_type { |
606 | /* The related handler can sleep. */ | |
607 | VMHT_BLOCKING = 0, | |
608 | ||
609 | /* The related handler must NOT sleep. */ | |
610 | VMHT_NON_BLOCKING = 1, | |
611 | }; | |
612 | ||
613 | struct vmbus_channel_message_table_entry { | |
614 | enum vmbus_channel_message_type message_type; | |
615 | enum vmbus_message_handler_type handler_type; | |
616 | void (*message_handler)(struct vmbus_channel_message_header *msg); | |
617 | }; | |
618 | ||
619 | extern struct vmbus_channel_message_table_entry | |
620 | channel_message_table[CHANNELMSG_COUNT]; | |
621 | ||
0f70b669 VK |
622 | /* Free the message slot and signal end-of-message if required */ |
623 | static inline void vmbus_signal_eom(struct hv_message *msg) | |
624 | { | |
625 | msg->header.message_type = HVMSG_NONE; | |
626 | ||
627 | /* | |
628 | * Make sure the write to MessageType (ie set to | |
629 | * HVMSG_NONE) happens before we read the | |
630 | * MessagePending and EOMing. Otherwise, the EOMing | |
631 | * will not deliver any more messages since there is | |
632 | * no empty slot | |
633 | */ | |
634 | mb(); | |
635 | ||
636 | if (msg->header.message_flags.msg_pending) { | |
637 | /* | |
638 | * This will cause message queue rescan to | |
639 | * possibly deliver another msg from the | |
640 | * hypervisor | |
641 | */ | |
642 | wrmsrl(HV_X64_MSR_EOM, 0); | |
643 | } | |
644 | } | |
645 | ||
89b2ca47 S |
646 | /* General vmbus interface */ |
647 | ||
1b9d48f2 | 648 | struct hv_device *vmbus_device_create(const uuid_le *type, |
649 | const uuid_le *instance, | |
650 | struct vmbus_channel *channel); | |
89b2ca47 | 651 | |
22794281 | 652 | int vmbus_device_register(struct hv_device *child_device_obj); |
696453ba | 653 | void vmbus_device_unregister(struct hv_device *device_obj); |
89b2ca47 S |
654 | |
655 | /* static void */ | |
656 | /* VmbusChildDeviceDestroy( */ | |
657 | /* struct hv_device *); */ | |
658 | ||
d43e2fe7 | 659 | struct vmbus_channel *relid2channel(u32 relid); |
89b2ca47 | 660 | |
93e5bd06 | 661 | void vmbus_free_channels(void); |
89b2ca47 S |
662 | |
663 | /* Connection interface */ | |
664 | ||
665 | int vmbus_connect(void); | |
09a19628 | 666 | void vmbus_disconnect(void); |
89b2ca47 | 667 | |
89b2ca47 S |
668 | int vmbus_post_msg(void *buffer, size_t buflen); |
669 | ||
1b807e10 | 670 | void vmbus_set_event(struct vmbus_channel *channel); |
89b2ca47 S |
671 | |
672 | void vmbus_on_event(unsigned long data); | |
d81274aa | 673 | void vmbus_on_msg_dpc(unsigned long data); |
89b2ca47 | 674 | |
3647a83d VK |
675 | int hv_kvp_init(struct hv_util_service *); |
676 | void hv_kvp_deinit(void); | |
677 | void hv_kvp_onchannelcallback(void *); | |
678 | ||
679 | int hv_vss_init(struct hv_util_service *); | |
680 | void hv_vss_deinit(void); | |
681 | void hv_vss_onchannelcallback(void *); | |
682 | ||
01325476 S |
683 | int hv_fcopy_init(struct hv_util_service *); |
684 | void hv_fcopy_deinit(void); | |
685 | void hv_fcopy_onchannelcallback(void *); | |
75ff3a8a | 686 | void vmbus_initiate_unload(bool crash); |
01325476 | 687 | |
8efe78fd VK |
688 | static inline void hv_poll_channel(struct vmbus_channel *channel, |
689 | void (*cb)(void *)) | |
690 | { | |
691 | if (!channel) | |
692 | return; | |
693 | ||
3cace4a6 | 694 | smp_call_function_single(channel->target_cpu, cb, channel, true); |
8efe78fd | 695 | } |
89b2ca47 | 696 | |
636c88da VK |
697 | enum hvutil_device_state { |
698 | HVUTIL_DEVICE_INIT = 0, /* driver is loaded, waiting for userspace */ | |
699 | HVUTIL_READY, /* userspace is registered */ | |
700 | HVUTIL_HOSTMSG_RECEIVED, /* message from the host was received */ | |
701 | HVUTIL_USERSPACE_REQ, /* request to userspace was sent */ | |
702 | HVUTIL_USERSPACE_RECV, /* reply from userspace was received */ | |
703 | HVUTIL_DEVICE_DYING, /* driver unload is in progress */ | |
704 | }; | |
705 | ||
0f2a6619 | 706 | #endif /* _HYPERV_VMBUS_H */ |