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25#ifndef _HYPERV_VMBUS_H
26#define _HYPERV_VMBUS_H
27
28#include <linux/list.h>
29#include <asm/sync_bitops.h>
30#include <asm/hyperv-tlfs.h>
31#include <linux/atomic.h>
32#include <linux/hyperv.h>
33#include <linux/interrupt.h>
34
35#include "hv_trace.h"
36
37
38
39
40#define HV_UTIL_TIMEOUT 30
41
42
43
44
45#define HV_UTIL_NEGO_TIMEOUT 55
46
47
48#define HV_EVENT_FLAGS_COUNT (256 * 8)
49#define HV_EVENT_FLAGS_LONG_COUNT (256 / sizeof(unsigned long))
50
51
52
53
54union hv_timer_config {
55 u64 as_uint64;
56 struct {
57 u64 enable:1;
58 u64 periodic:1;
59 u64 lazy:1;
60 u64 auto_enable:1;
61 u64 apic_vector:8;
62 u64 direct_mode:1;
63 u64 reserved_z0:3;
64 u64 sintx:4;
65 u64 reserved_z1:44;
66 };
67};
68
69
70
71union hv_synic_event_flags {
72 unsigned long flags[HV_EVENT_FLAGS_LONG_COUNT];
73};
74
75
76union hv_synic_scontrol {
77 u64 as_uint64;
78 struct {
79 u64 enable:1;
80 u64 reserved:63;
81 };
82};
83
84
85union hv_synic_sint {
86 u64 as_uint64;
87 struct {
88 u64 vector:8;
89 u64 reserved1:8;
90 u64 masked:1;
91 u64 auto_eoi:1;
92 u64 reserved2:46;
93 };
94};
95
96
97union hv_synic_simp {
98 u64 as_uint64;
99 struct {
100 u64 simp_enabled:1;
101 u64 preserved:11;
102 u64 base_simp_gpa:52;
103 };
104};
105
106
107union hv_synic_siefp {
108 u64 as_uint64;
109 struct {
110 u64 siefp_enabled:1;
111 u64 preserved:11;
112 u64 base_siefp_gpa:52;
113 };
114};
115
116
117union hv_monitor_trigger_group {
118 u64 as_uint64;
119 struct {
120 u32 pending;
121 u32 armed;
122 };
123};
124
125struct hv_monitor_parameter {
126 union hv_connection_id connectionid;
127 u16 flagnumber;
128 u16 rsvdz;
129};
130
131union hv_monitor_trigger_state {
132 u32 asu32;
133
134 struct {
135 u32 group_enable:4;
136 u32 rsvdz:28;
137 };
138};
139
140
141
142
143
144
145
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149
150
151
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153
154
155
156
157
158
159struct hv_monitor_page {
160 union hv_monitor_trigger_state trigger_state;
161 u32 rsvdz1;
162
163 union hv_monitor_trigger_group trigger_group[4];
164 u64 rsvdz2[3];
165
166 s32 next_checktime[4][32];
167
168 u16 latency[4][32];
169 u64 rsvdz3[32];
170
171 struct hv_monitor_parameter parameter[4][32];
172
173 u8 rsvdz4[1984];
174};
175
176#define HV_HYPERCALL_PARAM_ALIGN sizeof(u64)
177
178
179struct hv_input_post_message {
180 union hv_connection_id connectionid;
181 u32 reserved;
182 u32 message_type;
183 u32 payload_size;
184 u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
185};
186
187
188enum {
189 VMBUS_MESSAGE_CONNECTION_ID = 1,
190 VMBUS_MESSAGE_PORT_ID = 1,
191 VMBUS_EVENT_CONNECTION_ID = 2,
192 VMBUS_EVENT_PORT_ID = 2,
193 VMBUS_MONITOR_CONNECTION_ID = 3,
194 VMBUS_MONITOR_PORT_ID = 3,
195 VMBUS_MESSAGE_SINT = 2,
196};
197
198
199
200
201struct hv_per_cpu_context {
202 void *synic_message_page;
203 void *synic_event_page;
204
205
206
207 void *post_msg_page;
208
209
210
211
212
213
214 struct tasklet_struct msg_dpc;
215
216
217
218
219
220 struct list_head chan_list;
221 struct clock_event_device *clk_evt;
222};
223
224struct hv_context {
225
226
227
228 u64 guestid;
229
230 void *tsc_page;
231
232 bool synic_initialized;
233
234 struct hv_per_cpu_context __percpu *cpu_context;
235
236
237
238
239
240 struct cpumask *hv_numa_map;
241};
242
243extern struct hv_context hv_context;
244
245
246
247extern int hv_init(void);
248
249extern int hv_post_message(union hv_connection_id connection_id,
250 enum hv_message_type message_type,
251 void *payload, size_t payload_size);
252
253extern int hv_synic_alloc(void);
254
255extern void hv_synic_free(void);
256
257extern int hv_synic_init(unsigned int cpu);
258
259extern int hv_synic_cleanup(unsigned int cpu);
260
261extern void hv_synic_clockevents_cleanup(void);
262
263
264
265
266int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info,
267 struct page *pages, u32 pagecnt);
268
269void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info);
270
271int hv_ringbuffer_write(struct vmbus_channel *channel,
272 const struct kvec *kv_list, u32 kv_count);
273
274int hv_ringbuffer_read(struct vmbus_channel *channel,
275 void *buffer, u32 buflen, u32 *buffer_actual_len,
276 u64 *requestid, bool raw);
277
278
279
280
281
282
283#define MAX_NUM_CHANNELS ((PAGE_SIZE >> 1) << 3)
284
285
286
287#define MAX_NUM_CHANNELS_SUPPORTED 256
288
289
290enum vmbus_connect_state {
291 DISCONNECTED,
292 CONNECTING,
293 CONNECTED,
294 DISCONNECTING
295};
296
297#define MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT
298
299struct vmbus_connection {
300
301
302
303 int connect_cpu;
304
305 atomic_t offer_in_progress;
306
307 enum vmbus_connect_state conn_state;
308
309 atomic_t next_gpadl_handle;
310
311 struct completion unload_event;
312
313
314
315
316
317
318
319 void *int_page;
320 void *send_int_page;
321 void *recv_int_page;
322
323
324
325
326
327 struct hv_monitor_page *monitor_pages[2];
328 struct list_head chn_msg_list;
329 spinlock_t channelmsg_lock;
330
331
332 struct list_head chn_list;
333 struct mutex channel_mutex;
334
335 struct workqueue_struct *work_queue;
336};
337
338
339struct vmbus_msginfo {
340
341 struct list_head msglist_entry;
342
343
344 unsigned char msg[0];
345};
346
347
348extern struct vmbus_connection vmbus_connection;
349
350static inline void vmbus_send_interrupt(u32 relid)
351{
352 sync_set_bit(relid, vmbus_connection.send_int_page);
353}
354
355enum vmbus_message_handler_type {
356
357 VMHT_BLOCKING = 0,
358
359
360 VMHT_NON_BLOCKING = 1,
361};
362
363struct vmbus_channel_message_table_entry {
364 enum vmbus_channel_message_type message_type;
365 enum vmbus_message_handler_type handler_type;
366 void (*message_handler)(struct vmbus_channel_message_header *msg);
367};
368
369extern const struct vmbus_channel_message_table_entry
370 channel_message_table[CHANNELMSG_COUNT];
371
372
373
374
375struct hv_device *vmbus_device_create(const uuid_le *type,
376 const uuid_le *instance,
377 struct vmbus_channel *channel);
378
379int vmbus_device_register(struct hv_device *child_device_obj);
380void vmbus_device_unregister(struct hv_device *device_obj);
381int vmbus_add_channel_kobj(struct hv_device *device_obj,
382 struct vmbus_channel *channel);
383
384struct vmbus_channel *relid2channel(u32 relid);
385
386void vmbus_free_channels(void);
387
388
389
390int vmbus_connect(void);
391void vmbus_disconnect(void);
392
393int vmbus_post_msg(void *buffer, size_t buflen, bool can_sleep);
394
395void vmbus_on_event(unsigned long data);
396void vmbus_on_msg_dpc(unsigned long data);
397
398int hv_kvp_init(struct hv_util_service *srv);
399void hv_kvp_deinit(void);
400void hv_kvp_onchannelcallback(void *context);
401
402int hv_vss_init(struct hv_util_service *srv);
403void hv_vss_deinit(void);
404void hv_vss_onchannelcallback(void *context);
405
406int hv_fcopy_init(struct hv_util_service *srv);
407void hv_fcopy_deinit(void);
408void hv_fcopy_onchannelcallback(void *context);
409void vmbus_initiate_unload(bool crash);
410
411static inline void hv_poll_channel(struct vmbus_channel *channel,
412 void (*cb)(void *))
413{
414 if (!channel)
415 return;
416
417 if (in_interrupt() && (channel->target_cpu == smp_processor_id())) {
418 cb(channel);
419 return;
420 }
421 smp_call_function_single(channel->target_cpu, cb, channel, true);
422}
423
424enum hvutil_device_state {
425 HVUTIL_DEVICE_INIT = 0,
426 HVUTIL_READY,
427 HVUTIL_HOSTMSG_RECEIVED,
428 HVUTIL_USERSPACE_REQ,
429 HVUTIL_USERSPACE_RECV,
430 HVUTIL_DEVICE_DYING,
431};
432
433#endif
434