3 * Copyright (c) 2011, Microsoft Corporation.
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.
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
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.
19 * Haiyang Zhang <haiyangz@microsoft.com>
20 * Hank Janssen <hjanssen@microsoft.com>
21 * K. Y. Srinivasan <kys@microsoft.com>
25 #ifndef _HYPERV_VMBUS_H
26 #define _HYPERV_VMBUS_H
28 #include <linux/list.h>
29 #include <asm/sync_bitops.h>
30 #include <linux/atomic.h>
31 #include <linux/hyperv.h>
34 * Timeout for services such as KVP and fcopy.
36 #define HV_UTIL_TIMEOUT 30
39 * Timeout for guest-host handshake for services.
41 #define HV_UTIL_NEGO_TIMEOUT 55
44 /* Define version of the synthetic interrupt controller. */
45 #define HV_SYNIC_VERSION (1)
47 #define HV_ANY_VP (0xFFFFFFFF)
49 /* Define synthetic interrupt controller flag constants. */
50 #define HV_EVENT_FLAGS_COUNT (256 * 8)
51 #define HV_EVENT_FLAGS_BYTE_COUNT (256)
52 #define HV_EVENT_FLAGS_DWORD_COUNT (256 / sizeof(u32))
54 /* Define invalid partition identifier. */
55 #define HV_PARTITION_ID_INVALID ((u64)0x0)
57 /* Define port type. */
64 /* Define port information structure. */
66 enum hv_port_type port_type;
88 struct hv_connection_info {
89 enum hv_port_type port_type;
94 } message_connection_info;
97 } event_connection_info;
100 } monitor_connection_info;
105 * Timer configuration register.
107 union hv_timer_config {
120 /* Define the number of message buffers associated with each port. */
121 #define HV_PORT_MESSAGE_BUFFER_COUNT (16)
123 /* Define the synthetic interrupt controller event flags format. */
124 union hv_synic_event_flags {
125 u8 flags8[HV_EVENT_FLAGS_BYTE_COUNT];
126 u32 flags32[HV_EVENT_FLAGS_DWORD_COUNT];
129 /* Define the synthetic interrupt flags page layout. */
130 struct hv_synic_event_flags_page {
131 union hv_synic_event_flags sintevent_flags[HV_SYNIC_SINT_COUNT];
134 /* Define SynIC control register. */
135 union hv_synic_scontrol {
143 /* Define synthetic interrupt source. */
144 union hv_synic_sint {
155 /* Define the format of the SIMP register */
156 union hv_synic_simp {
161 u64 base_simp_gpa:52;
165 /* Define the format of the SIEFP register */
166 union hv_synic_siefp {
171 u64 base_siefp_gpa:52;
175 /* Definitions for the monitored notification facility */
176 union hv_monitor_trigger_group {
184 struct hv_monitor_parameter {
185 union hv_connection_id connectionid;
190 union hv_monitor_trigger_state {
199 /* struct hv_monitor_page Layout */
200 /* ------------------------------------------------------ */
201 /* | 0 | TriggerState (4 bytes) | Rsvd1 (4 bytes) | */
202 /* | 8 | TriggerGroup[0] | */
203 /* | 10 | TriggerGroup[1] | */
204 /* | 18 | TriggerGroup[2] | */
205 /* | 20 | TriggerGroup[3] | */
206 /* | 28 | Rsvd2[0] | */
207 /* | 30 | Rsvd2[1] | */
208 /* | 38 | Rsvd2[2] | */
209 /* | 40 | NextCheckTime[0][0] | NextCheckTime[0][1] | */
211 /* | 240 | Latency[0][0..3] | */
212 /* | 340 | Rsvz3[0] | */
213 /* | 440 | Parameter[0][0] | */
214 /* | 448 | Parameter[0][1] | */
216 /* | 840 | Rsvd4[0] | */
217 /* ------------------------------------------------------ */
218 struct hv_monitor_page {
219 union hv_monitor_trigger_state trigger_state;
222 union hv_monitor_trigger_group trigger_group[4];
225 s32 next_checktime[4][32];
230 struct hv_monitor_parameter parameter[4][32];
235 /* Definition of the hv_post_message hypercall input structure. */
236 struct hv_input_post_message {
237 union hv_connection_id connectionid;
241 u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
245 * Versioning definitions used for guests reporting themselves to the
246 * hypervisor, and visa versa.
249 /* Version info reported by guest OS's */
250 enum hv_guest_os_vendor {
251 HVGUESTOS_VENDOR_MICROSOFT = 0x0001
254 enum hv_guest_os_microsoft_ids {
255 HVGUESTOS_MICROSOFT_UNDEFINED = 0x00,
256 HVGUESTOS_MICROSOFT_MSDOS = 0x01,
257 HVGUESTOS_MICROSOFT_WINDOWS3X = 0x02,
258 HVGUESTOS_MICROSOFT_WINDOWS9X = 0x03,
259 HVGUESTOS_MICROSOFT_WINDOWSNT = 0x04,
260 HVGUESTOS_MICROSOFT_WINDOWSCE = 0x05
264 * Declare the MSR used to identify the guest OS.
266 #define HV_X64_MSR_GUEST_OS_ID 0x40000000
268 union hv_x64_msr_guest_os_id_contents {
272 u64 service_version:8; /* Service Pack, etc. */
275 u64 os_id:8; /* enum hv_guest_os_microsoft_ids (if Vendor=MS) */
276 u64 vendor_id:16; /* enum hv_guest_os_vendor */
281 VMBUS_MESSAGE_CONNECTION_ID = 1,
282 VMBUS_MESSAGE_PORT_ID = 1,
283 VMBUS_EVENT_CONNECTION_ID = 2,
284 VMBUS_EVENT_PORT_ID = 2,
285 VMBUS_MONITOR_CONNECTION_ID = 3,
286 VMBUS_MONITOR_PORT_ID = 3,
287 VMBUS_MESSAGE_SINT = 2,
292 #define HV_PRESENT_BIT 0x80000000
295 #define HV_CPU_POWER_MANAGEMENT (1 << 0)
296 #define HV_RECOMMENDATIONS_MAX 4
299 #define HV_CAPS_MAX 8
302 #define HV_HYPERCALL_PARAM_ALIGN sizeof(u64)
305 /* Service definitions */
307 #define HV_SERVICE_PARENT_PORT (0)
308 #define HV_SERVICE_PARENT_CONNECTION (0)
310 #define HV_SERVICE_CONNECT_RESPONSE_SUCCESS (0)
311 #define HV_SERVICE_CONNECT_RESPONSE_INVALID_PARAMETER (1)
312 #define HV_SERVICE_CONNECT_RESPONSE_UNKNOWN_SERVICE (2)
313 #define HV_SERVICE_CONNECT_RESPONSE_CONNECTION_REJECTED (3)
315 #define HV_SERVICE_CONNECT_REQUEST_MESSAGE_ID (1)
316 #define HV_SERVICE_CONNECT_RESPONSE_MESSAGE_ID (2)
317 #define HV_SERVICE_DISCONNECT_REQUEST_MESSAGE_ID (3)
318 #define HV_SERVICE_DISCONNECT_RESPONSE_MESSAGE_ID (4)
319 #define HV_SERVICE_MAX_MESSAGE_ID (4)
321 #define HV_SERVICE_PROTOCOL_VERSION (0x0010)
322 #define HV_CONNECT_PAYLOAD_BYTE_COUNT 64
324 /* #define VMBUS_REVISION_NUMBER 6 */
326 /* Our local vmbus's port and connection id. Anything >0 is fine */
327 /* #define VMBUS_PORT_ID 11 */
329 /* 628180B8-308D-4c5e-B7DB-1BEB62E62EF4 */
330 static const uuid_le VMBUS_SERVICE_ID = {
332 0xb8, 0x80, 0x81, 0x62, 0x8d, 0x30, 0x5e, 0x4c,
333 0xb7, 0xdb, 0x1b, 0xeb, 0x62, 0xe6, 0x2e, 0xf4
340 /* We only support running on top of Hyper-V
341 * So at this point this really can only contain the Hyper-V ID
347 bool synic_initialized;
349 void *synic_message_page[NR_CPUS];
350 void *synic_event_page[NR_CPUS];
352 * Hypervisor's notion of virtual processor ID is different from
353 * Linux' notion of CPU ID. This information can only be retrieved
354 * in the context of the calling CPU. Setup a map for easy access
355 * to this information:
357 * vp_index[a] is the Hyper-V's processor ID corresponding to
360 u32 vp_index[NR_CPUS];
362 * Starting with win8, we can take channel interrupts on any CPU;
363 * we will manage the tasklet that handles events messages on a per CPU
366 struct tasklet_struct *event_dpc[NR_CPUS];
367 struct tasklet_struct *msg_dpc[NR_CPUS];
369 * To optimize the mapping of relid to channel, maintain
370 * per-cpu list of the channels based on their CPU affinity.
372 struct list_head percpu_list[NR_CPUS];
374 * buffer to post messages to the host.
376 void *post_msg_page[NR_CPUS];
378 * Support PV clockevent device.
380 struct clock_event_device *clk_evt[NR_CPUS];
382 * To manage allocations in a NUMA node.
383 * Array indexed by numa node ID.
385 struct cpumask *hv_numa_map;
388 extern struct hv_context hv_context;
390 struct hv_ring_buffer_debug_info {
391 u32 current_interrupt_mask;
392 u32 current_read_index;
393 u32 current_write_index;
394 u32 bytes_avail_toread;
395 u32 bytes_avail_towrite;
400 extern int hv_init(void);
402 extern void hv_cleanup(bool crash);
404 extern int hv_post_message(union hv_connection_id connection_id,
405 enum hv_message_type message_type,
406 void *payload, size_t payload_size);
408 extern int hv_synic_alloc(void);
410 extern void hv_synic_free(void);
412 extern int hv_synic_init(unsigned int cpu);
414 extern int hv_synic_cleanup(unsigned int cpu);
416 extern void hv_synic_clockevents_cleanup(void);
421 int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info,
422 struct page *pages, u32 pagecnt);
424 void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info);
426 int hv_ringbuffer_write(struct vmbus_channel *channel,
427 struct kvec *kv_list,
428 u32 kv_count, bool lock,
431 int hv_ringbuffer_read(struct vmbus_channel *channel,
432 void *buffer, u32 buflen, u32 *buffer_actual_len,
433 u64 *requestid, bool raw);
435 void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info,
436 struct hv_ring_buffer_debug_info *debug_info);
438 void hv_begin_read(struct hv_ring_buffer_info *rbi);
440 u32 hv_end_read(struct hv_ring_buffer_info *rbi);
443 * Maximum channels is determined by the size of the interrupt page
444 * which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt
445 * and the other is receive endpoint interrupt
447 #define MAX_NUM_CHANNELS ((PAGE_SIZE >> 1) << 3) /* 16348 channels */
449 /* The value here must be in multiple of 32 */
450 /* TODO: Need to make this configurable */
451 #define MAX_NUM_CHANNELS_SUPPORTED 256
454 enum vmbus_connect_state {
461 #define MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT
463 struct vmbus_connection {
464 enum vmbus_connect_state conn_state;
466 atomic_t next_gpadl_handle;
468 struct completion unload_event;
470 * Represents channel interrupts. Each bit position represents a
471 * channel. When a channel sends an interrupt via VMBUS, it finds its
472 * bit in the sendInterruptPage, set it and calls Hv to generate a port
473 * event. The other end receives the port event and parse the
474 * recvInterruptPage to see which bit is set
481 * 2 pages - 1st page for parent->child notification and 2nd
482 * is child->parent notification
484 struct hv_monitor_page *monitor_pages[2];
485 struct list_head chn_msg_list;
486 spinlock_t channelmsg_lock;
488 /* List of channels */
489 struct list_head chn_list;
490 struct mutex channel_mutex;
492 struct workqueue_struct *work_queue;
496 struct vmbus_msginfo {
497 /* Bookkeeping stuff */
498 struct list_head msglist_entry;
500 /* The message itself */
501 unsigned char msg[0];
505 extern struct vmbus_connection vmbus_connection;
507 enum vmbus_message_handler_type {
508 /* The related handler can sleep. */
511 /* The related handler must NOT sleep. */
512 VMHT_NON_BLOCKING = 1,
515 struct vmbus_channel_message_table_entry {
516 enum vmbus_channel_message_type message_type;
517 enum vmbus_message_handler_type handler_type;
518 void (*message_handler)(struct vmbus_channel_message_header *msg);
521 extern struct vmbus_channel_message_table_entry
522 channel_message_table[CHANNELMSG_COUNT];
525 /* General vmbus interface */
527 struct hv_device *vmbus_device_create(const uuid_le *type,
528 const uuid_le *instance,
529 struct vmbus_channel *channel);
531 int vmbus_device_register(struct hv_device *child_device_obj);
532 void vmbus_device_unregister(struct hv_device *device_obj);
535 /* VmbusChildDeviceDestroy( */
536 /* struct hv_device *); */
538 struct vmbus_channel *relid2channel(u32 relid);
540 void vmbus_free_channels(void);
542 /* Connection interface */
544 int vmbus_connect(void);
545 void vmbus_disconnect(void);
547 int vmbus_post_msg(void *buffer, size_t buflen, bool can_sleep);
549 void vmbus_on_event(unsigned long data);
550 void vmbus_on_msg_dpc(unsigned long data);
552 int hv_kvp_init(struct hv_util_service *);
553 void hv_kvp_deinit(void);
554 void hv_kvp_onchannelcallback(void *);
556 int hv_vss_init(struct hv_util_service *);
557 void hv_vss_deinit(void);
558 void hv_vss_onchannelcallback(void *);
560 int hv_fcopy_init(struct hv_util_service *);
561 void hv_fcopy_deinit(void);
562 void hv_fcopy_onchannelcallback(void *);
563 void vmbus_initiate_unload(bool crash);
565 static inline void hv_poll_channel(struct vmbus_channel *channel,
571 smp_call_function_single(channel->target_cpu, cb, channel, true);
574 enum hvutil_device_state {
575 HVUTIL_DEVICE_INIT = 0, /* driver is loaded, waiting for userspace */
576 HVUTIL_READY, /* userspace is registered */
577 HVUTIL_HOSTMSG_RECEIVED, /* message from the host was received */
578 HVUTIL_USERSPACE_REQ, /* request to userspace was sent */
579 HVUTIL_USERSPACE_RECV, /* reply from userspace was received */
580 HVUTIL_DEVICE_DYING, /* driver unload is in progress */
583 #endif /* _HYPERV_VMBUS_H */