Commit | Line | Data |
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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 | ||
4dbfc2e6 VK |
38 | /* |
39 | * Timeout for guest-host handshake for services. | |
40 | */ | |
41 | #define HV_UTIL_NEGO_TIMEOUT 60 | |
42 | ||
afbdc4a9 S |
43 | /* |
44 | * The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent | |
45 | * is set by CPUID(HVCPUID_VERSION_FEATURES). | |
46 | */ | |
47 | enum hv_cpuid_function { | |
48 | HVCPUID_VERSION_FEATURES = 0x00000001, | |
49 | HVCPUID_VENDOR_MAXFUNCTION = 0x40000000, | |
50 | HVCPUID_INTERFACE = 0x40000001, | |
51 | ||
52 | /* | |
53 | * The remaining functions depend on the value of | |
54 | * HVCPUID_INTERFACE | |
55 | */ | |
56 | HVCPUID_VERSION = 0x40000002, | |
57 | HVCPUID_FEATURES = 0x40000003, | |
58 | HVCPUID_ENLIGHTENMENT_INFO = 0x40000004, | |
59 | HVCPUID_IMPLEMENTATION_LIMITS = 0x40000005, | |
60 | }; | |
61 | ||
96c1d058 NM |
62 | #define HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE 0x400 |
63 | ||
64 | #define HV_X64_MSR_CRASH_P0 0x40000100 | |
65 | #define HV_X64_MSR_CRASH_P1 0x40000101 | |
66 | #define HV_X64_MSR_CRASH_P2 0x40000102 | |
67 | #define HV_X64_MSR_CRASH_P3 0x40000103 | |
68 | #define HV_X64_MSR_CRASH_P4 0x40000104 | |
69 | #define HV_X64_MSR_CRASH_CTL 0x40000105 | |
70 | ||
5ef5b692 | 71 | #define HV_CRASH_CTL_CRASH_NOTIFY (1ULL << 63) |
96c1d058 | 72 | |
afbdc4a9 S |
73 | /* Define version of the synthetic interrupt controller. */ |
74 | #define HV_SYNIC_VERSION (1) | |
75 | ||
afbdc4a9 S |
76 | #define HV_ANY_VP (0xFFFFFFFF) |
77 | ||
78 | /* Define synthetic interrupt controller flag constants. */ | |
79 | #define HV_EVENT_FLAGS_COUNT (256 * 8) | |
80 | #define HV_EVENT_FLAGS_BYTE_COUNT (256) | |
81 | #define HV_EVENT_FLAGS_DWORD_COUNT (256 / sizeof(u32)) | |
82 | ||
afbdc4a9 S |
83 | /* Define invalid partition identifier. */ |
84 | #define HV_PARTITION_ID_INVALID ((u64)0x0) | |
85 | ||
afbdc4a9 S |
86 | /* Define port type. */ |
87 | enum hv_port_type { | |
88 | HVPORT_MSG = 1, | |
89 | HVPORT_EVENT = 2, | |
90 | HVPORT_MONITOR = 3 | |
91 | }; | |
92 | ||
93 | /* Define port information structure. */ | |
94 | struct hv_port_info { | |
95 | enum hv_port_type port_type; | |
96 | u32 padding; | |
97 | union { | |
98 | struct { | |
99 | u32 target_sint; | |
100 | u32 target_vp; | |
101 | u64 rsvdz; | |
102 | } message_port_info; | |
103 | struct { | |
104 | u32 target_sint; | |
105 | u32 target_vp; | |
e26009aa | 106 | u16 base_flag_number; |
afbdc4a9 S |
107 | u16 flag_count; |
108 | u32 rsvdz; | |
109 | } event_port_info; | |
110 | struct { | |
111 | u64 monitor_address; | |
112 | u64 rsvdz; | |
113 | } monitor_port_info; | |
114 | }; | |
115 | }; | |
116 | ||
117 | struct hv_connection_info { | |
118 | enum hv_port_type port_type; | |
119 | u32 padding; | |
120 | union { | |
121 | struct { | |
122 | u64 rsvdz; | |
123 | } message_connection_info; | |
124 | struct { | |
125 | u64 rsvdz; | |
126 | } event_connection_info; | |
127 | struct { | |
128 | u64 monitor_address; | |
129 | } monitor_connection_info; | |
130 | }; | |
131 | }; | |
132 | ||
4061ed9e S |
133 | /* |
134 | * Timer configuration register. | |
135 | */ | |
136 | union hv_timer_config { | |
137 | u64 as_uint64; | |
138 | struct { | |
139 | u64 enable:1; | |
140 | u64 periodic:1; | |
141 | u64 lazy:1; | |
142 | u64 auto_enable:1; | |
143 | u64 reserved_z0:12; | |
144 | u64 sintx:4; | |
145 | u64 reserved_z1:44; | |
146 | }; | |
147 | }; | |
148 | ||
afbdc4a9 S |
149 | /* Define the number of message buffers associated with each port. */ |
150 | #define HV_PORT_MESSAGE_BUFFER_COUNT (16) | |
151 | ||
afbdc4a9 S |
152 | /* Define the synthetic interrupt controller event flags format. */ |
153 | union hv_synic_event_flags { | |
154 | u8 flags8[HV_EVENT_FLAGS_BYTE_COUNT]; | |
155 | u32 flags32[HV_EVENT_FLAGS_DWORD_COUNT]; | |
156 | }; | |
157 | ||
158 | /* Define the synthetic interrupt flags page layout. */ | |
159 | struct hv_synic_event_flags_page { | |
160 | union hv_synic_event_flags sintevent_flags[HV_SYNIC_SINT_COUNT]; | |
161 | }; | |
162 | ||
163 | /* Define SynIC control register. */ | |
164 | union hv_synic_scontrol { | |
165 | u64 as_uint64; | |
166 | struct { | |
167 | u64 enable:1; | |
168 | u64 reserved:63; | |
169 | }; | |
170 | }; | |
171 | ||
172 | /* Define synthetic interrupt source. */ | |
173 | union hv_synic_sint { | |
174 | u64 as_uint64; | |
175 | struct { | |
176 | u64 vector:8; | |
177 | u64 reserved1:8; | |
178 | u64 masked:1; | |
179 | u64 auto_eoi:1; | |
180 | u64 reserved2:46; | |
181 | }; | |
182 | }; | |
183 | ||
184 | /* Define the format of the SIMP register */ | |
185 | union hv_synic_simp { | |
186 | u64 as_uint64; | |
187 | struct { | |
188 | u64 simp_enabled:1; | |
189 | u64 preserved:11; | |
190 | u64 base_simp_gpa:52; | |
191 | }; | |
192 | }; | |
193 | ||
194 | /* Define the format of the SIEFP register */ | |
195 | union hv_synic_siefp { | |
196 | u64 as_uint64; | |
197 | struct { | |
198 | u64 siefp_enabled:1; | |
199 | u64 preserved:11; | |
200 | u64 base_siefp_gpa:52; | |
201 | }; | |
202 | }; | |
203 | ||
204 | /* Definitions for the monitored notification facility */ | |
205 | union hv_monitor_trigger_group { | |
206 | u64 as_uint64; | |
207 | struct { | |
208 | u32 pending; | |
209 | u32 armed; | |
210 | }; | |
211 | }; | |
212 | ||
213 | struct hv_monitor_parameter { | |
214 | union hv_connection_id connectionid; | |
215 | u16 flagnumber; | |
216 | u16 rsvdz; | |
217 | }; | |
218 | ||
219 | union hv_monitor_trigger_state { | |
220 | u32 asu32; | |
221 | ||
222 | struct { | |
223 | u32 group_enable:4; | |
224 | u32 rsvdz:28; | |
225 | }; | |
226 | }; | |
227 | ||
228 | /* struct hv_monitor_page Layout */ | |
229 | /* ------------------------------------------------------ */ | |
230 | /* | 0 | TriggerState (4 bytes) | Rsvd1 (4 bytes) | */ | |
231 | /* | 8 | TriggerGroup[0] | */ | |
232 | /* | 10 | TriggerGroup[1] | */ | |
233 | /* | 18 | TriggerGroup[2] | */ | |
234 | /* | 20 | TriggerGroup[3] | */ | |
235 | /* | 28 | Rsvd2[0] | */ | |
236 | /* | 30 | Rsvd2[1] | */ | |
237 | /* | 38 | Rsvd2[2] | */ | |
238 | /* | 40 | NextCheckTime[0][0] | NextCheckTime[0][1] | */ | |
239 | /* | ... | */ | |
240 | /* | 240 | Latency[0][0..3] | */ | |
241 | /* | 340 | Rsvz3[0] | */ | |
242 | /* | 440 | Parameter[0][0] | */ | |
243 | /* | 448 | Parameter[0][1] | */ | |
244 | /* | ... | */ | |
245 | /* | 840 | Rsvd4[0] | */ | |
246 | /* ------------------------------------------------------ */ | |
247 | struct hv_monitor_page { | |
248 | union hv_monitor_trigger_state trigger_state; | |
249 | u32 rsvdz1; | |
250 | ||
251 | union hv_monitor_trigger_group trigger_group[4]; | |
252 | u64 rsvdz2[3]; | |
253 | ||
254 | s32 next_checktime[4][32]; | |
255 | ||
256 | u16 latency[4][32]; | |
257 | u64 rsvdz3[32]; | |
258 | ||
259 | struct hv_monitor_parameter parameter[4][32]; | |
260 | ||
261 | u8 rsvdz4[1984]; | |
262 | }; | |
263 | ||
afbdc4a9 S |
264 | /* Definition of the hv_post_message hypercall input structure. */ |
265 | struct hv_input_post_message { | |
266 | union hv_connection_id connectionid; | |
267 | u32 reserved; | |
7797dcf6 | 268 | u32 message_type; |
afbdc4a9 S |
269 | u32 payload_size; |
270 | u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT]; | |
271 | }; | |
272 | ||
afbdc4a9 S |
273 | /* |
274 | * Versioning definitions used for guests reporting themselves to the | |
275 | * hypervisor, and visa versa. | |
276 | */ | |
277 | ||
278 | /* Version info reported by guest OS's */ | |
279 | enum hv_guest_os_vendor { | |
280 | HVGUESTOS_VENDOR_MICROSOFT = 0x0001 | |
281 | }; | |
282 | ||
283 | enum hv_guest_os_microsoft_ids { | |
284 | HVGUESTOS_MICROSOFT_UNDEFINED = 0x00, | |
285 | HVGUESTOS_MICROSOFT_MSDOS = 0x01, | |
286 | HVGUESTOS_MICROSOFT_WINDOWS3X = 0x02, | |
287 | HVGUESTOS_MICROSOFT_WINDOWS9X = 0x03, | |
288 | HVGUESTOS_MICROSOFT_WINDOWSNT = 0x04, | |
289 | HVGUESTOS_MICROSOFT_WINDOWSCE = 0x05 | |
290 | }; | |
291 | ||
292 | /* | |
293 | * Declare the MSR used to identify the guest OS. | |
294 | */ | |
295 | #define HV_X64_MSR_GUEST_OS_ID 0x40000000 | |
296 | ||
297 | union hv_x64_msr_guest_os_id_contents { | |
298 | u64 as_uint64; | |
299 | struct { | |
300 | u64 build_number:16; | |
301 | u64 service_version:8; /* Service Pack, etc. */ | |
302 | u64 minor_version:8; | |
303 | u64 major_version:8; | |
304 | u64 os_id:8; /* enum hv_guest_os_microsoft_ids (if Vendor=MS) */ | |
305 | u64 vendor_id:16; /* enum hv_guest_os_vendor */ | |
306 | }; | |
307 | }; | |
308 | ||
309 | /* | |
310 | * Declare the MSR used to setup pages used to communicate with the hypervisor. | |
311 | */ | |
312 | #define HV_X64_MSR_HYPERCALL 0x40000001 | |
313 | ||
314 | union hv_x64_msr_hypercall_contents { | |
315 | u64 as_uint64; | |
316 | struct { | |
317 | u64 enable:1; | |
318 | u64 reserved:11; | |
319 | u64 guest_physical_address:52; | |
320 | }; | |
321 | }; | |
322 | ||
3645a917 S |
323 | |
324 | enum { | |
325 | VMBUS_MESSAGE_CONNECTION_ID = 1, | |
326 | VMBUS_MESSAGE_PORT_ID = 1, | |
327 | VMBUS_EVENT_CONNECTION_ID = 2, | |
328 | VMBUS_EVENT_PORT_ID = 2, | |
329 | VMBUS_MONITOR_CONNECTION_ID = 3, | |
330 | VMBUS_MONITOR_PORT_ID = 3, | |
331 | VMBUS_MESSAGE_SINT = 2, | |
332 | }; | |
333 | ||
334 | /* #defines */ | |
335 | ||
336 | #define HV_PRESENT_BIT 0x80000000 | |
337 | ||
83ba0c4f S |
338 | /* |
339 | * The guest OS needs to register the guest ID with the hypervisor. | |
340 | * The guest ID is a 64 bit entity and the structure of this ID is | |
341 | * specified in the Hyper-V specification: | |
342 | * | |
343 | * http://msdn.microsoft.com/en-us/library/windows/hardware/ff542653%28v=vs.85%29.aspx | |
344 | * | |
345 | * While the current guideline does not specify how Linux guest ID(s) | |
346 | * need to be generated, our plan is to publish the guidelines for | |
347 | * Linux and other guest operating systems that currently are hosted | |
348 | * on Hyper-V. The implementation here conforms to this yet | |
349 | * unpublished guidelines. | |
350 | * | |
351 | * | |
352 | * Bit(s) | |
353 | * 63 - Indicates if the OS is Open Source or not; 1 is Open Source | |
354 | * 62:56 - Os Type; Linux is 0x100 | |
355 | * 55:48 - Distro specific identification | |
356 | * 47:16 - Linux kernel version number | |
357 | * 15:0 - Distro specific identification | |
358 | * | |
359 | * | |
360 | */ | |
361 | ||
362 | #define HV_LINUX_VENDOR_ID 0x8100 | |
363 | ||
364 | /* | |
365 | * Generate the guest ID based on the guideline described above. | |
366 | */ | |
367 | ||
368 | static inline __u64 generate_guest_id(__u8 d_info1, __u32 kernel_version, | |
369 | __u16 d_info2) | |
370 | { | |
371 | __u64 guest_id = 0; | |
372 | ||
373 | guest_id = (((__u64)HV_LINUX_VENDOR_ID) << 48); | |
374 | guest_id |= (((__u64)(d_info1)) << 48); | |
375 | guest_id |= (((__u64)(kernel_version)) << 16); | |
376 | guest_id |= ((__u64)(d_info2)); | |
377 | ||
378 | return guest_id; | |
379 | } | |
380 | ||
3645a917 S |
381 | |
382 | #define HV_CPU_POWER_MANAGEMENT (1 << 0) | |
383 | #define HV_RECOMMENDATIONS_MAX 4 | |
384 | ||
385 | #define HV_X64_MAX 5 | |
386 | #define HV_CAPS_MAX 8 | |
387 | ||
388 | ||
389 | #define HV_HYPERCALL_PARAM_ALIGN sizeof(u64) | |
390 | ||
391 | ||
392 | /* Service definitions */ | |
393 | ||
394 | #define HV_SERVICE_PARENT_PORT (0) | |
395 | #define HV_SERVICE_PARENT_CONNECTION (0) | |
396 | ||
397 | #define HV_SERVICE_CONNECT_RESPONSE_SUCCESS (0) | |
398 | #define HV_SERVICE_CONNECT_RESPONSE_INVALID_PARAMETER (1) | |
399 | #define HV_SERVICE_CONNECT_RESPONSE_UNKNOWN_SERVICE (2) | |
400 | #define HV_SERVICE_CONNECT_RESPONSE_CONNECTION_REJECTED (3) | |
401 | ||
402 | #define HV_SERVICE_CONNECT_REQUEST_MESSAGE_ID (1) | |
403 | #define HV_SERVICE_CONNECT_RESPONSE_MESSAGE_ID (2) | |
404 | #define HV_SERVICE_DISCONNECT_REQUEST_MESSAGE_ID (3) | |
405 | #define HV_SERVICE_DISCONNECT_RESPONSE_MESSAGE_ID (4) | |
406 | #define HV_SERVICE_MAX_MESSAGE_ID (4) | |
407 | ||
408 | #define HV_SERVICE_PROTOCOL_VERSION (0x0010) | |
409 | #define HV_CONNECT_PAYLOAD_BYTE_COUNT 64 | |
410 | ||
411 | /* #define VMBUS_REVISION_NUMBER 6 */ | |
412 | ||
413 | /* Our local vmbus's port and connection id. Anything >0 is fine */ | |
414 | /* #define VMBUS_PORT_ID 11 */ | |
415 | ||
416 | /* 628180B8-308D-4c5e-B7DB-1BEB62E62EF4 */ | |
358d2ee2 S |
417 | static const uuid_le VMBUS_SERVICE_ID = { |
418 | .b = { | |
3645a917 S |
419 | 0xb8, 0x80, 0x81, 0x62, 0x8d, 0x30, 0x5e, 0x4c, |
420 | 0xb7, 0xdb, 0x1b, 0xeb, 0x62, 0xe6, 0x2e, 0xf4 | |
421 | }, | |
422 | }; | |
423 | ||
3645a917 S |
424 | |
425 | ||
3645a917 S |
426 | struct hv_context { |
427 | /* We only support running on top of Hyper-V | |
428 | * So at this point this really can only contain the Hyper-V ID | |
429 | */ | |
430 | u64 guestid; | |
431 | ||
432 | void *hypercall_page; | |
ca9357bd | 433 | void *tsc_page; |
3645a917 S |
434 | |
435 | bool synic_initialized; | |
436 | ||
14c1bf8a S |
437 | void *synic_message_page[NR_CPUS]; |
438 | void *synic_event_page[NR_CPUS]; | |
917ea427 S |
439 | /* |
440 | * Hypervisor's notion of virtual processor ID is different from | |
441 | * Linux' notion of CPU ID. This information can only be retrieved | |
442 | * in the context of the calling CPU. Setup a map for easy access | |
443 | * to this information: | |
444 | * | |
445 | * vp_index[a] is the Hyper-V's processor ID corresponding to | |
446 | * Linux cpuid 'a'. | |
447 | */ | |
448 | u32 vp_index[NR_CPUS]; | |
db11f12a S |
449 | /* |
450 | * Starting with win8, we can take channel interrupts on any CPU; | |
d81274aa | 451 | * we will manage the tasklet that handles events messages on a per CPU |
db11f12a S |
452 | * basis. |
453 | */ | |
454 | struct tasklet_struct *event_dpc[NR_CPUS]; | |
d81274aa | 455 | struct tasklet_struct *msg_dpc[NR_CPUS]; |
3a28fa35 S |
456 | /* |
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]; | |
b29ef354 S |
461 | /* |
462 | * buffer to post messages to the host. | |
463 | */ | |
464 | void *post_msg_page[NR_CPUS]; | |
4061ed9e S |
465 | /* |
466 | * Support PV clockevent device. | |
467 | */ | |
468 | struct clock_event_device *clk_evt[NR_CPUS]; | |
9f01ec53 S |
469 | /* |
470 | * To manage allocations in a NUMA node. | |
471 | * Array indexed by numa node ID. | |
472 | */ | |
473 | struct cpumask *hv_numa_map; | |
3645a917 S |
474 | }; |
475 | ||
476 | extern struct hv_context hv_context; | |
477 | ||
ca9357bd S |
478 | struct 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 | ||
1fdde16d GKH |
486 | struct 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 | }; | |
3645a917 S |
493 | |
494 | /* Hv Interface */ | |
495 | ||
496 | extern int hv_init(void); | |
497 | ||
498 | extern void hv_cleanup(void); | |
499 | ||
415f0a02 | 500 | extern int hv_post_message(union hv_connection_id connection_id, |
3645a917 S |
501 | enum hv_message_type message_type, |
502 | void *payload, size_t payload_size); | |
503 | ||
2608fb65 JW |
504 | extern int hv_synic_alloc(void); |
505 | ||
506 | extern void hv_synic_free(void); | |
507 | ||
3645a917 S |
508 | extern void hv_synic_init(void *irqarg); |
509 | ||
510 | extern void hv_synic_cleanup(void *arg); | |
511 | ||
e086748c VK |
512 | extern void hv_synic_clockevents_cleanup(void); |
513 | ||
5fbebb2d S |
514 | /* |
515 | * Host version information. | |
516 | */ | |
517 | extern unsigned int host_info_eax; | |
518 | extern unsigned int host_info_ebx; | |
519 | extern unsigned int host_info_ecx; | |
520 | extern unsigned int host_info_edx; | |
940655c1 S |
521 | |
522 | /* Interface */ | |
523 | ||
524 | ||
525 | int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, void *buffer, | |
526 | u32 buflen); | |
527 | ||
528 | void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info); | |
529 | ||
530 | int hv_ringbuffer_write(struct hv_ring_buffer_info *ring_info, | |
011a7c3c | 531 | struct kvec *kv_list, |
fe760e4d | 532 | u32 kv_count, bool *signal, bool lock); |
940655c1 | 533 | |
940b68e2 VK |
534 | int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info, |
535 | void *buffer, u32 buflen, u32 *buffer_actual_len, | |
536 | u64 *requestid, bool *signal, bool raw); | |
940655c1 | 537 | |
940655c1 S |
538 | void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info, |
539 | struct hv_ring_buffer_debug_info *debug_info); | |
540 | ||
6fdf3b21 S |
541 | void hv_begin_read(struct hv_ring_buffer_info *rbi); |
542 | ||
543 | u32 hv_end_read(struct hv_ring_buffer_info *rbi); | |
544 | ||
89b2ca47 S |
545 | /* |
546 | * Maximum channels is determined by the size of the interrupt page | |
547 | * which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt | |
548 | * and the other is receive endpoint interrupt | |
549 | */ | |
550 | #define MAX_NUM_CHANNELS ((PAGE_SIZE >> 1) << 3) /* 16348 channels */ | |
551 | ||
552 | /* The value here must be in multiple of 32 */ | |
553 | /* TODO: Need to make this configurable */ | |
554 | #define MAX_NUM_CHANNELS_SUPPORTED 256 | |
555 | ||
556 | ||
557 | enum vmbus_connect_state { | |
558 | DISCONNECTED, | |
559 | CONNECTING, | |
560 | CONNECTED, | |
561 | DISCONNECTING | |
562 | }; | |
563 | ||
564 | #define MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT | |
565 | ||
566 | struct vmbus_connection { | |
567 | enum vmbus_connect_state conn_state; | |
568 | ||
569 | atomic_t next_gpadl_handle; | |
570 | ||
2db84eff | 571 | struct completion unload_event; |
89b2ca47 S |
572 | /* |
573 | * Represents channel interrupts. Each bit position represents a | |
574 | * channel. When a channel sends an interrupt via VMBUS, it finds its | |
575 | * bit in the sendInterruptPage, set it and calls Hv to generate a port | |
576 | * event. The other end receives the port event and parse the | |
577 | * recvInterruptPage to see which bit is set | |
578 | */ | |
579 | void *int_page; | |
580 | void *send_int_page; | |
581 | void *recv_int_page; | |
582 | ||
583 | /* | |
584 | * 2 pages - 1st page for parent->child notification and 2nd | |
585 | * is child->parent notification | |
586 | */ | |
8681db44 | 587 | struct hv_monitor_page *monitor_pages[2]; |
89b2ca47 S |
588 | struct list_head chn_msg_list; |
589 | spinlock_t channelmsg_lock; | |
590 | ||
591 | /* List of channels */ | |
592 | struct list_head chn_list; | |
d6f591e3 | 593 | struct mutex channel_mutex; |
89b2ca47 S |
594 | |
595 | struct workqueue_struct *work_queue; | |
596 | }; | |
597 | ||
598 | ||
599 | struct vmbus_msginfo { | |
600 | /* Bookkeeping stuff */ | |
601 | struct list_head msglist_entry; | |
602 | ||
603 | /* The message itself */ | |
604 | unsigned char msg[0]; | |
605 | }; | |
606 | ||
607 | ||
608 | extern struct vmbus_connection vmbus_connection; | |
609 | ||
652594c7 DC |
610 | enum vmbus_message_handler_type { |
611 | /* The related handler can sleep. */ | |
612 | VMHT_BLOCKING = 0, | |
613 | ||
614 | /* The related handler must NOT sleep. */ | |
615 | VMHT_NON_BLOCKING = 1, | |
616 | }; | |
617 | ||
618 | struct vmbus_channel_message_table_entry { | |
619 | enum vmbus_channel_message_type message_type; | |
620 | enum vmbus_message_handler_type handler_type; | |
621 | void (*message_handler)(struct vmbus_channel_message_header *msg); | |
622 | }; | |
623 | ||
624 | extern struct vmbus_channel_message_table_entry | |
625 | channel_message_table[CHANNELMSG_COUNT]; | |
626 | ||
0f70b669 | 627 | /* Free the message slot and signal end-of-message if required */ |
cd95aad5 | 628 | static inline void vmbus_signal_eom(struct hv_message *msg, u32 old_msg_type) |
0f70b669 | 629 | { |
cd95aad5 VK |
630 | /* |
631 | * On crash we're reading some other CPU's message page and we need | |
632 | * to be careful: this other CPU may already had cleared the header | |
633 | * and the host may already had delivered some other message there. | |
634 | * In case we blindly write msg->header.message_type we're going | |
635 | * to lose it. We can still lose a message of the same type but | |
636 | * we count on the fact that there can only be one | |
637 | * CHANNELMSG_UNLOAD_RESPONSE and we don't care about other messages | |
638 | * on crash. | |
639 | */ | |
640 | if (cmpxchg(&msg->header.message_type, old_msg_type, | |
641 | HVMSG_NONE) != old_msg_type) | |
642 | return; | |
0f70b669 VK |
643 | |
644 | /* | |
645 | * Make sure the write to MessageType (ie set to | |
646 | * HVMSG_NONE) happens before we read the | |
647 | * MessagePending and EOMing. Otherwise, the EOMing | |
648 | * will not deliver any more messages since there is | |
649 | * no empty slot | |
650 | */ | |
651 | mb(); | |
652 | ||
653 | if (msg->header.message_flags.msg_pending) { | |
654 | /* | |
655 | * This will cause message queue rescan to | |
656 | * possibly deliver another msg from the | |
657 | * hypervisor | |
658 | */ | |
659 | wrmsrl(HV_X64_MSR_EOM, 0); | |
660 | } | |
661 | } | |
662 | ||
89b2ca47 S |
663 | /* General vmbus interface */ |
664 | ||
1b9d48f2 | 665 | struct hv_device *vmbus_device_create(const uuid_le *type, |
666 | const uuid_le *instance, | |
667 | struct vmbus_channel *channel); | |
89b2ca47 | 668 | |
22794281 | 669 | int vmbus_device_register(struct hv_device *child_device_obj); |
696453ba | 670 | void vmbus_device_unregister(struct hv_device *device_obj); |
89b2ca47 S |
671 | |
672 | /* static void */ | |
673 | /* VmbusChildDeviceDestroy( */ | |
674 | /* struct hv_device *); */ | |
675 | ||
d43e2fe7 | 676 | struct vmbus_channel *relid2channel(u32 relid); |
89b2ca47 | 677 | |
93e5bd06 | 678 | void vmbus_free_channels(void); |
89b2ca47 S |
679 | |
680 | /* Connection interface */ | |
681 | ||
682 | int vmbus_connect(void); | |
09a19628 | 683 | void vmbus_disconnect(void); |
89b2ca47 | 684 | |
89b2ca47 S |
685 | int vmbus_post_msg(void *buffer, size_t buflen); |
686 | ||
89b2ca47 | 687 | void vmbus_on_event(unsigned long data); |
d81274aa | 688 | void vmbus_on_msg_dpc(unsigned long data); |
89b2ca47 | 689 | |
3647a83d VK |
690 | int hv_kvp_init(struct hv_util_service *); |
691 | void hv_kvp_deinit(void); | |
692 | void hv_kvp_onchannelcallback(void *); | |
693 | ||
694 | int hv_vss_init(struct hv_util_service *); | |
695 | void hv_vss_deinit(void); | |
696 | void hv_vss_onchannelcallback(void *); | |
697 | ||
01325476 S |
698 | int hv_fcopy_init(struct hv_util_service *); |
699 | void hv_fcopy_deinit(void); | |
700 | void hv_fcopy_onchannelcallback(void *); | |
75ff3a8a | 701 | void vmbus_initiate_unload(bool crash); |
01325476 | 702 | |
8efe78fd VK |
703 | static inline void hv_poll_channel(struct vmbus_channel *channel, |
704 | void (*cb)(void *)) | |
705 | { | |
706 | if (!channel) | |
707 | return; | |
708 | ||
3cace4a6 | 709 | smp_call_function_single(channel->target_cpu, cb, channel, true); |
8efe78fd | 710 | } |
89b2ca47 | 711 | |
636c88da VK |
712 | enum hvutil_device_state { |
713 | HVUTIL_DEVICE_INIT = 0, /* driver is loaded, waiting for userspace */ | |
714 | HVUTIL_READY, /* userspace is registered */ | |
715 | HVUTIL_HOSTMSG_RECEIVED, /* message from the host was received */ | |
716 | HVUTIL_USERSPACE_REQ, /* request to userspace was sent */ | |
717 | HVUTIL_USERSPACE_RECV, /* reply from userspace was received */ | |
718 | HVUTIL_DEVICE_DYING, /* driver unload is in progress */ | |
719 | }; | |
720 | ||
0f2a6619 | 721 | #endif /* _HYPERV_VMBUS_H */ |