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3b20eb23 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
5c473400 S |
2 | /* |
3 | * | |
4 | * Copyright (c) 2011, Microsoft Corporation. | |
5 | * | |
5c473400 S |
6 | * Authors: |
7 | * Haiyang Zhang <haiyangz@microsoft.com> | |
8 | * Hank Janssen <hjanssen@microsoft.com> | |
9 | * K. Y. Srinivasan <kys@microsoft.com> | |
5c473400 | 10 | */ |
3f335ea2 S |
11 | |
12 | #ifndef _HYPERV_H | |
13 | #define _HYPERV_H | |
14 | ||
5267cf02 | 15 | #include <uapi/linux/hyperv.h> |
2939437c | 16 | |
5267cf02 | 17 | #include <linux/types.h> |
8ff3e6fc S |
18 | #include <linux/scatterlist.h> |
19 | #include <linux/list.h> | |
20 | #include <linux/timer.h> | |
8ff3e6fc S |
21 | #include <linux/completion.h> |
22 | #include <linux/device.h> | |
2e2c1d17 | 23 | #include <linux/mod_devicetable.h> |
631e63a9 | 24 | #include <linux/interrupt.h> |
63273cb4 | 25 | #include <linux/reciprocal_div.h> |
8ff3e6fc | 26 | |
7e5ec368 | 27 | #define MAX_PAGE_BUFFER_COUNT 32 |
a363bf7b S |
28 | #define MAX_MULTIPAGE_BUFFER_COUNT 32 /* 128K */ |
29 | ||
30 | #pragma pack(push, 1) | |
31 | ||
32 | /* Single-page buffer */ | |
33 | struct hv_page_buffer { | |
34 | u32 len; | |
35 | u32 offset; | |
36 | u64 pfn; | |
37 | }; | |
38 | ||
39 | /* Multiple-page buffer */ | |
40 | struct hv_multipage_buffer { | |
41 | /* Length and Offset determines the # of pfns in the array */ | |
42 | u32 len; | |
43 | u32 offset; | |
44 | u64 pfn_array[MAX_MULTIPAGE_BUFFER_COUNT]; | |
45 | }; | |
46 | ||
d61031ee S |
47 | /* |
48 | * Multiple-page buffer array; the pfn array is variable size: | |
49 | * The number of entries in the PFN array is determined by | |
50 | * "len" and "offset". | |
51 | */ | |
52 | struct hv_mpb_array { | |
53 | /* Length and Offset determines the # of pfns in the array */ | |
54 | u32 len; | |
55 | u32 offset; | |
56 | u64 pfn_array[]; | |
57 | }; | |
58 | ||
a363bf7b S |
59 | /* 0x18 includes the proprietary packet header */ |
60 | #define MAX_PAGE_BUFFER_PACKET (0x18 + \ | |
61 | (sizeof(struct hv_page_buffer) * \ | |
62 | MAX_PAGE_BUFFER_COUNT)) | |
63 | #define MAX_MULTIPAGE_BUFFER_PACKET (0x18 + \ | |
64 | sizeof(struct hv_multipage_buffer)) | |
65 | ||
66 | ||
67 | #pragma pack(pop) | |
68 | ||
7effffb7 S |
69 | struct hv_ring_buffer { |
70 | /* Offset in bytes from the start of ring data below */ | |
71 | u32 write_index; | |
72 | ||
73 | /* Offset in bytes from the start of ring data below */ | |
74 | u32 read_index; | |
75 | ||
76 | u32 interrupt_mask; | |
77 | ||
2416603e | 78 | /* |
71b38245 MK |
79 | * WS2012/Win8 and later versions of Hyper-V implement interrupt |
80 | * driven flow management. The feature bit feat_pending_send_sz | |
81 | * is set by the host on the host->guest ring buffer, and by the | |
82 | * guest on the guest->host ring buffer. | |
2416603e | 83 | * |
71b38245 MK |
84 | * The meaning of the feature bit is a bit complex in that it has |
85 | * semantics that apply to both ring buffers. If the guest sets | |
86 | * the feature bit in the guest->host ring buffer, the guest is | |
87 | * telling the host that: | |
88 | * 1) It will set the pending_send_sz field in the guest->host ring | |
89 | * buffer when it is waiting for space to become available, and | |
90 | * 2) It will read the pending_send_sz field in the host->guest | |
91 | * ring buffer and interrupt the host when it frees enough space | |
92 | * | |
93 | * Similarly, if the host sets the feature bit in the host->guest | |
94 | * ring buffer, the host is telling the guest that: | |
95 | * 1) It will set the pending_send_sz field in the host->guest ring | |
96 | * buffer when it is waiting for space to become available, and | |
97 | * 2) It will read the pending_send_sz field in the guest->host | |
98 | * ring buffer and interrupt the guest when it frees enough space | |
99 | * | |
100 | * If either the guest or host does not set the feature bit that it | |
101 | * owns, that guest or host must do polling if it encounters a full | |
102 | * ring buffer, and not signal the other end with an interrupt. | |
7effffb7 | 103 | */ |
2416603e | 104 | u32 pending_send_sz; |
2416603e | 105 | u32 reserved1[12]; |
2416603e S |
106 | union { |
107 | struct { | |
108 | u32 feat_pending_send_sz:1; | |
109 | }; | |
110 | u32 value; | |
111 | } feature_bits; | |
112 | ||
113 | /* Pad it to PAGE_SIZE so that data starts on page boundary */ | |
114 | u8 reserved2[4028]; | |
7effffb7 S |
115 | |
116 | /* | |
117 | * Ring data starts here + RingDataStartOffset | |
118 | * !!! DO NOT place any fields below this !!! | |
119 | */ | |
120 | u8 buffer[0]; | |
121 | } __packed; | |
122 | ||
123 | struct hv_ring_buffer_info { | |
124 | struct hv_ring_buffer *ring_buffer; | |
125 | u32 ring_size; /* Include the shared header */ | |
63273cb4 | 126 | struct reciprocal_value ring_size_div10_reciprocal; |
7effffb7 S |
127 | spinlock_t ring_lock; |
128 | ||
129 | u32 ring_datasize; /* < ring_size */ | |
ab028db4 | 130 | u32 priv_read_index; |
14948e39 KB |
131 | /* |
132 | * The ring buffer mutex lock. This lock prevents the ring buffer from | |
133 | * being freed while the ring buffer is being accessed. | |
134 | */ | |
135 | struct mutex ring_buffer_mutex; | |
7effffb7 S |
136 | }; |
137 | ||
33be96e4 | 138 | |
e4165a0f | 139 | static inline u32 hv_get_bytes_to_read(const struct hv_ring_buffer_info *rbi) |
a6341f00 S |
140 | { |
141 | u32 read_loc, write_loc, dsize, read; | |
142 | ||
143 | dsize = rbi->ring_datasize; | |
144 | read_loc = rbi->ring_buffer->read_index; | |
145 | write_loc = READ_ONCE(rbi->ring_buffer->write_index); | |
146 | ||
147 | read = write_loc >= read_loc ? (write_loc - read_loc) : | |
148 | (dsize - read_loc) + write_loc; | |
149 | ||
150 | return read; | |
151 | } | |
152 | ||
e4165a0f | 153 | static inline u32 hv_get_bytes_to_write(const struct hv_ring_buffer_info *rbi) |
a6341f00 S |
154 | { |
155 | u32 read_loc, write_loc, dsize, write; | |
156 | ||
157 | dsize = rbi->ring_datasize; | |
158 | read_loc = READ_ONCE(rbi->ring_buffer->read_index); | |
159 | write_loc = rbi->ring_buffer->write_index; | |
160 | ||
161 | write = write_loc >= read_loc ? dsize - (write_loc - read_loc) : | |
162 | read_loc - write_loc; | |
163 | return write; | |
164 | } | |
165 | ||
63273cb4 LL |
166 | static inline u32 hv_get_avail_to_write_percent( |
167 | const struct hv_ring_buffer_info *rbi) | |
168 | { | |
169 | u32 avail_write = hv_get_bytes_to_write(rbi); | |
170 | ||
171 | return reciprocal_divide( | |
172 | (avail_write << 3) + (avail_write << 1), | |
173 | rbi->ring_size_div10_reciprocal); | |
174 | } | |
175 | ||
eafa7072 S |
176 | /* |
177 | * VMBUS version is 32 bit entity broken up into | |
178 | * two 16 bit quantities: major_number. minor_number. | |
179 | * | |
180 | * 0 . 13 (Windows Server 2008) | |
181 | * 1 . 1 (Windows 7) | |
182 | * 2 . 4 (Windows 8) | |
03367ef5 | 183 | * 3 . 0 (Windows 8 R2) |
6c4e5f9c | 184 | * 4 . 0 (Windows 10) |
ae20b254 | 185 | * 5 . 0 (Newer Windows 10) |
eafa7072 S |
186 | */ |
187 | ||
188 | #define VERSION_WS2008 ((0 << 16) | (13)) | |
189 | #define VERSION_WIN7 ((1 << 16) | (1)) | |
190 | #define VERSION_WIN8 ((2 << 16) | (4)) | |
03367ef5 | 191 | #define VERSION_WIN8_1 ((3 << 16) | (0)) |
6c4e5f9c | 192 | #define VERSION_WIN10 ((4 << 16) | (0)) |
ae20b254 | 193 | #define VERSION_WIN10_V5 ((5 << 16) | (0)) |
eafa7072 S |
194 | |
195 | #define VERSION_INVAL -1 | |
196 | ||
ae20b254 | 197 | #define VERSION_CURRENT VERSION_WIN10_V5 |
f7c6dfda | 198 | |
517d8dc6 S |
199 | /* Make maximum size of pipe payload of 16K */ |
200 | #define MAX_PIPE_DATA_PAYLOAD (sizeof(u8) * 16384) | |
201 | ||
202 | /* Define PipeMode values. */ | |
203 | #define VMBUS_PIPE_TYPE_BYTE 0x00000000 | |
204 | #define VMBUS_PIPE_TYPE_MESSAGE 0x00000004 | |
205 | ||
206 | /* The size of the user defined data buffer for non-pipe offers. */ | |
207 | #define MAX_USER_DEFINED_BYTES 120 | |
208 | ||
209 | /* The size of the user defined data buffer for pipe offers. */ | |
210 | #define MAX_PIPE_USER_DEFINED_BYTES 116 | |
211 | ||
212 | /* | |
213 | * At the center of the Channel Management library is the Channel Offer. This | |
214 | * struct contains the fundamental information about an offer. | |
215 | */ | |
216 | struct vmbus_channel_offer { | |
593db803 AS |
217 | guid_t if_type; |
218 | guid_t if_instance; | |
29423b7e S |
219 | |
220 | /* | |
221 | * These two fields are not currently used. | |
222 | */ | |
223 | u64 reserved1; | |
224 | u64 reserved2; | |
225 | ||
517d8dc6 S |
226 | u16 chn_flags; |
227 | u16 mmio_megabytes; /* in bytes * 1024 * 1024 */ | |
228 | ||
229 | union { | |
230 | /* Non-pipes: The user has MAX_USER_DEFINED_BYTES bytes. */ | |
231 | struct { | |
232 | unsigned char user_def[MAX_USER_DEFINED_BYTES]; | |
233 | } std; | |
234 | ||
235 | /* | |
236 | * Pipes: | |
237 | * The following sructure is an integrated pipe protocol, which | |
238 | * is implemented on top of standard user-defined data. Pipe | |
239 | * clients have MAX_PIPE_USER_DEFINED_BYTES left for their own | |
240 | * use. | |
241 | */ | |
242 | struct { | |
243 | u32 pipe_mode; | |
244 | unsigned char user_def[MAX_PIPE_USER_DEFINED_BYTES]; | |
245 | } pipe; | |
246 | } u; | |
29423b7e S |
247 | /* |
248 | * The sub_channel_index is defined in win8. | |
249 | */ | |
250 | u16 sub_channel_index; | |
251 | u16 reserved3; | |
517d8dc6 S |
252 | } __packed; |
253 | ||
254 | /* Server Flags */ | |
255 | #define VMBUS_CHANNEL_ENUMERATE_DEVICE_INTERFACE 1 | |
256 | #define VMBUS_CHANNEL_SERVER_SUPPORTS_TRANSFER_PAGES 2 | |
257 | #define VMBUS_CHANNEL_SERVER_SUPPORTS_GPADLS 4 | |
258 | #define VMBUS_CHANNEL_NAMED_PIPE_MODE 0x10 | |
259 | #define VMBUS_CHANNEL_LOOPBACK_OFFER 0x100 | |
260 | #define VMBUS_CHANNEL_PARENT_OFFER 0x200 | |
261 | #define VMBUS_CHANNEL_REQUEST_MONITORED_NOTIFICATION 0x400 | |
e8d6ca02 | 262 | #define VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER 0x2000 |
517d8dc6 | 263 | |
50ed40e0 S |
264 | struct vmpacket_descriptor { |
265 | u16 type; | |
266 | u16 offset8; | |
267 | u16 len8; | |
268 | u16 flags; | |
269 | u64 trans_id; | |
270 | } __packed; | |
271 | ||
272 | struct vmpacket_header { | |
273 | u32 prev_pkt_start_offset; | |
274 | struct vmpacket_descriptor descriptor; | |
275 | } __packed; | |
276 | ||
277 | struct vmtransfer_page_range { | |
278 | u32 byte_count; | |
279 | u32 byte_offset; | |
280 | } __packed; | |
281 | ||
282 | struct vmtransfer_page_packet_header { | |
283 | struct vmpacket_descriptor d; | |
284 | u16 xfer_pageset_id; | |
1508d811 | 285 | u8 sender_owns_set; |
50ed40e0 S |
286 | u8 reserved; |
287 | u32 range_cnt; | |
288 | struct vmtransfer_page_range ranges[1]; | |
289 | } __packed; | |
290 | ||
291 | struct vmgpadl_packet_header { | |
292 | struct vmpacket_descriptor d; | |
293 | u32 gpadl; | |
294 | u32 reserved; | |
295 | } __packed; | |
296 | ||
297 | struct vmadd_remove_transfer_page_set { | |
298 | struct vmpacket_descriptor d; | |
299 | u32 gpadl; | |
300 | u16 xfer_pageset_id; | |
301 | u16 reserved; | |
302 | } __packed; | |
303 | ||
304 | /* | |
305 | * This structure defines a range in guest physical space that can be made to | |
306 | * look virtually contiguous. | |
307 | */ | |
308 | struct gpa_range { | |
309 | u32 byte_count; | |
310 | u32 byte_offset; | |
311 | u64 pfn_array[0]; | |
312 | }; | |
313 | ||
314 | /* | |
315 | * This is the format for an Establish Gpadl packet, which contains a handle by | |
316 | * which this GPADL will be known and a set of GPA ranges associated with it. | |
317 | * This can be converted to a MDL by the guest OS. If there are multiple GPA | |
318 | * ranges, then the resulting MDL will be "chained," representing multiple VA | |
319 | * ranges. | |
320 | */ | |
321 | struct vmestablish_gpadl { | |
322 | struct vmpacket_descriptor d; | |
323 | u32 gpadl; | |
324 | u32 range_cnt; | |
325 | struct gpa_range range[1]; | |
326 | } __packed; | |
327 | ||
328 | /* | |
329 | * This is the format for a Teardown Gpadl packet, which indicates that the | |
330 | * GPADL handle in the Establish Gpadl packet will never be referenced again. | |
331 | */ | |
332 | struct vmteardown_gpadl { | |
333 | struct vmpacket_descriptor d; | |
334 | u32 gpadl; | |
335 | u32 reserved; /* for alignment to a 8-byte boundary */ | |
336 | } __packed; | |
337 | ||
338 | /* | |
339 | * This is the format for a GPA-Direct packet, which contains a set of GPA | |
340 | * ranges, in addition to commands and/or data. | |
341 | */ | |
342 | struct vmdata_gpa_direct { | |
343 | struct vmpacket_descriptor d; | |
344 | u32 reserved; | |
345 | u32 range_cnt; | |
346 | struct gpa_range range[1]; | |
347 | } __packed; | |
348 | ||
349 | /* This is the format for a Additional Data Packet. */ | |
350 | struct vmadditional_data { | |
351 | struct vmpacket_descriptor d; | |
352 | u64 total_bytes; | |
353 | u32 offset; | |
354 | u32 byte_cnt; | |
355 | unsigned char data[1]; | |
356 | } __packed; | |
357 | ||
358 | union vmpacket_largest_possible_header { | |
359 | struct vmpacket_descriptor simple_hdr; | |
360 | struct vmtransfer_page_packet_header xfer_page_hdr; | |
361 | struct vmgpadl_packet_header gpadl_hdr; | |
362 | struct vmadd_remove_transfer_page_set add_rm_xfer_page_hdr; | |
363 | struct vmestablish_gpadl establish_gpadl_hdr; | |
364 | struct vmteardown_gpadl teardown_gpadl_hdr; | |
365 | struct vmdata_gpa_direct data_gpa_direct_hdr; | |
366 | }; | |
367 | ||
368 | #define VMPACKET_DATA_START_ADDRESS(__packet) \ | |
369 | (void *)(((unsigned char *)__packet) + \ | |
370 | ((struct vmpacket_descriptor)__packet)->offset8 * 8) | |
371 | ||
372 | #define VMPACKET_DATA_LENGTH(__packet) \ | |
373 | ((((struct vmpacket_descriptor)__packet)->len8 - \ | |
374 | ((struct vmpacket_descriptor)__packet)->offset8) * 8) | |
375 | ||
376 | #define VMPACKET_TRANSFER_MODE(__packet) \ | |
377 | (((struct IMPACT)__packet)->type) | |
378 | ||
379 | enum vmbus_packet_type { | |
380 | VM_PKT_INVALID = 0x0, | |
381 | VM_PKT_SYNCH = 0x1, | |
382 | VM_PKT_ADD_XFER_PAGESET = 0x2, | |
383 | VM_PKT_RM_XFER_PAGESET = 0x3, | |
384 | VM_PKT_ESTABLISH_GPADL = 0x4, | |
385 | VM_PKT_TEARDOWN_GPADL = 0x5, | |
386 | VM_PKT_DATA_INBAND = 0x6, | |
387 | VM_PKT_DATA_USING_XFER_PAGES = 0x7, | |
388 | VM_PKT_DATA_USING_GPADL = 0x8, | |
389 | VM_PKT_DATA_USING_GPA_DIRECT = 0x9, | |
390 | VM_PKT_CANCEL_REQUEST = 0xa, | |
391 | VM_PKT_COMP = 0xb, | |
392 | VM_PKT_DATA_USING_ADDITIONAL_PKT = 0xc, | |
393 | VM_PKT_ADDITIONAL_DATA = 0xd | |
394 | }; | |
395 | ||
396 | #define VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED 1 | |
517d8dc6 | 397 | |
b56dda06 | 398 | |
b56dda06 S |
399 | /* Version 1 messages */ |
400 | enum vmbus_channel_message_type { | |
401 | CHANNELMSG_INVALID = 0, | |
402 | CHANNELMSG_OFFERCHANNEL = 1, | |
403 | CHANNELMSG_RESCIND_CHANNELOFFER = 2, | |
404 | CHANNELMSG_REQUESTOFFERS = 3, | |
405 | CHANNELMSG_ALLOFFERS_DELIVERED = 4, | |
406 | CHANNELMSG_OPENCHANNEL = 5, | |
407 | CHANNELMSG_OPENCHANNEL_RESULT = 6, | |
408 | CHANNELMSG_CLOSECHANNEL = 7, | |
409 | CHANNELMSG_GPADL_HEADER = 8, | |
410 | CHANNELMSG_GPADL_BODY = 9, | |
411 | CHANNELMSG_GPADL_CREATED = 10, | |
412 | CHANNELMSG_GPADL_TEARDOWN = 11, | |
413 | CHANNELMSG_GPADL_TORNDOWN = 12, | |
414 | CHANNELMSG_RELID_RELEASED = 13, | |
415 | CHANNELMSG_INITIATE_CONTACT = 14, | |
416 | CHANNELMSG_VERSION_RESPONSE = 15, | |
417 | CHANNELMSG_UNLOAD = 16, | |
2db84eff | 418 | CHANNELMSG_UNLOAD_RESPONSE = 17, |
5c23a1a5 DC |
419 | CHANNELMSG_18 = 18, |
420 | CHANNELMSG_19 = 19, | |
421 | CHANNELMSG_20 = 20, | |
422 | CHANNELMSG_TL_CONNECT_REQUEST = 21, | |
b56dda06 S |
423 | CHANNELMSG_COUNT |
424 | }; | |
425 | ||
426 | struct vmbus_channel_message_header { | |
427 | enum vmbus_channel_message_type msgtype; | |
428 | u32 padding; | |
429 | } __packed; | |
430 | ||
431 | /* Query VMBus Version parameters */ | |
432 | struct vmbus_channel_query_vmbus_version { | |
433 | struct vmbus_channel_message_header header; | |
434 | u32 version; | |
435 | } __packed; | |
436 | ||
437 | /* VMBus Version Supported parameters */ | |
438 | struct vmbus_channel_version_supported { | |
439 | struct vmbus_channel_message_header header; | |
1508d811 | 440 | u8 version_supported; |
b56dda06 S |
441 | } __packed; |
442 | ||
443 | /* Offer Channel parameters */ | |
444 | struct vmbus_channel_offer_channel { | |
445 | struct vmbus_channel_message_header header; | |
446 | struct vmbus_channel_offer offer; | |
447 | u32 child_relid; | |
448 | u8 monitorid; | |
29423b7e S |
449 | /* |
450 | * win7 and beyond splits this field into a bit field. | |
451 | */ | |
452 | u8 monitor_allocated:1; | |
453 | u8 reserved:7; | |
454 | /* | |
455 | * These are new fields added in win7 and later. | |
456 | * Do not access these fields without checking the | |
457 | * negotiated protocol. | |
458 | * | |
459 | * If "is_dedicated_interrupt" is set, we must not set the | |
460 | * associated bit in the channel bitmap while sending the | |
461 | * interrupt to the host. | |
462 | * | |
463 | * connection_id is to be used in signaling the host. | |
464 | */ | |
465 | u16 is_dedicated_interrupt:1; | |
466 | u16 reserved1:15; | |
467 | u32 connection_id; | |
b56dda06 S |
468 | } __packed; |
469 | ||
470 | /* Rescind Offer parameters */ | |
471 | struct vmbus_channel_rescind_offer { | |
472 | struct vmbus_channel_message_header header; | |
473 | u32 child_relid; | |
474 | } __packed; | |
475 | ||
4827ee1d SH |
476 | static inline u32 |
477 | hv_ringbuffer_pending_size(const struct hv_ring_buffer_info *rbi) | |
478 | { | |
479 | return rbi->ring_buffer->pending_send_sz; | |
480 | } | |
481 | ||
b56dda06 S |
482 | /* |
483 | * Request Offer -- no parameters, SynIC message contains the partition ID | |
484 | * Set Snoop -- no parameters, SynIC message contains the partition ID | |
485 | * Clear Snoop -- no parameters, SynIC message contains the partition ID | |
486 | * All Offers Delivered -- no parameters, SynIC message contains the partition | |
487 | * ID | |
488 | * Flush Client -- no parameters, SynIC message contains the partition ID | |
489 | */ | |
490 | ||
491 | /* Open Channel parameters */ | |
492 | struct vmbus_channel_open_channel { | |
493 | struct vmbus_channel_message_header header; | |
494 | ||
495 | /* Identifies the specific VMBus channel that is being opened. */ | |
496 | u32 child_relid; | |
497 | ||
498 | /* ID making a particular open request at a channel offer unique. */ | |
499 | u32 openid; | |
500 | ||
501 | /* GPADL for the channel's ring buffer. */ | |
502 | u32 ringbuffer_gpadlhandle; | |
503 | ||
abbf3b2a S |
504 | /* |
505 | * Starting with win8, this field will be used to specify | |
506 | * the target virtual processor on which to deliver the interrupt for | |
507 | * the host to guest communication. | |
508 | * Prior to win8, incoming channel interrupts would only | |
509 | * be delivered on cpu 0. Setting this value to 0 would | |
510 | * preserve the earlier behavior. | |
511 | */ | |
512 | u32 target_vp; | |
b56dda06 S |
513 | |
514 | /* | |
2a9d7de2 SH |
515 | * The upstream ring buffer begins at offset zero in the memory |
516 | * described by RingBufferGpadlHandle. The downstream ring buffer | |
517 | * follows it at this offset (in pages). | |
518 | */ | |
b56dda06 S |
519 | u32 downstream_ringbuffer_pageoffset; |
520 | ||
521 | /* User-specific data to be passed along to the server endpoint. */ | |
522 | unsigned char userdata[MAX_USER_DEFINED_BYTES]; | |
523 | } __packed; | |
524 | ||
525 | /* Open Channel Result parameters */ | |
526 | struct vmbus_channel_open_result { | |
527 | struct vmbus_channel_message_header header; | |
528 | u32 child_relid; | |
529 | u32 openid; | |
530 | u32 status; | |
531 | } __packed; | |
532 | ||
533 | /* Close channel parameters; */ | |
534 | struct vmbus_channel_close_channel { | |
535 | struct vmbus_channel_message_header header; | |
536 | u32 child_relid; | |
537 | } __packed; | |
538 | ||
539 | /* Channel Message GPADL */ | |
540 | #define GPADL_TYPE_RING_BUFFER 1 | |
541 | #define GPADL_TYPE_SERVER_SAVE_AREA 2 | |
542 | #define GPADL_TYPE_TRANSACTION 8 | |
543 | ||
544 | /* | |
545 | * The number of PFNs in a GPADL message is defined by the number of | |
546 | * pages that would be spanned by ByteCount and ByteOffset. If the | |
547 | * implied number of PFNs won't fit in this packet, there will be a | |
548 | * follow-up packet that contains more. | |
549 | */ | |
550 | struct vmbus_channel_gpadl_header { | |
551 | struct vmbus_channel_message_header header; | |
552 | u32 child_relid; | |
553 | u32 gpadl; | |
554 | u16 range_buflen; | |
555 | u16 rangecount; | |
556 | struct gpa_range range[0]; | |
557 | } __packed; | |
558 | ||
559 | /* This is the followup packet that contains more PFNs. */ | |
560 | struct vmbus_channel_gpadl_body { | |
561 | struct vmbus_channel_message_header header; | |
562 | u32 msgnumber; | |
563 | u32 gpadl; | |
564 | u64 pfn[0]; | |
565 | } __packed; | |
566 | ||
567 | struct vmbus_channel_gpadl_created { | |
568 | struct vmbus_channel_message_header header; | |
569 | u32 child_relid; | |
570 | u32 gpadl; | |
571 | u32 creation_status; | |
572 | } __packed; | |
573 | ||
574 | struct vmbus_channel_gpadl_teardown { | |
575 | struct vmbus_channel_message_header header; | |
576 | u32 child_relid; | |
577 | u32 gpadl; | |
578 | } __packed; | |
579 | ||
580 | struct vmbus_channel_gpadl_torndown { | |
581 | struct vmbus_channel_message_header header; | |
582 | u32 gpadl; | |
583 | } __packed; | |
584 | ||
b56dda06 S |
585 | struct vmbus_channel_relid_released { |
586 | struct vmbus_channel_message_header header; | |
587 | u32 child_relid; | |
588 | } __packed; | |
589 | ||
590 | struct vmbus_channel_initiate_contact { | |
591 | struct vmbus_channel_message_header header; | |
592 | u32 vmbus_version_requested; | |
e28bab48 | 593 | u32 target_vcpu; /* The VCPU the host should respond to */ |
ae20b254 DC |
594 | union { |
595 | u64 interrupt_page; | |
596 | struct { | |
597 | u8 msg_sint; | |
598 | u8 padding1[3]; | |
599 | u32 padding2; | |
600 | }; | |
601 | }; | |
b56dda06 S |
602 | u64 monitor_page1; |
603 | u64 monitor_page2; | |
604 | } __packed; | |
605 | ||
5c23a1a5 DC |
606 | /* Hyper-V socket: guest's connect()-ing to host */ |
607 | struct vmbus_channel_tl_connect_request { | |
608 | struct vmbus_channel_message_header header; | |
593db803 AS |
609 | guid_t guest_endpoint_id; |
610 | guid_t host_service_id; | |
5c23a1a5 DC |
611 | } __packed; |
612 | ||
b56dda06 S |
613 | struct vmbus_channel_version_response { |
614 | struct vmbus_channel_message_header header; | |
1508d811 | 615 | u8 version_supported; |
ae20b254 DC |
616 | |
617 | u8 connection_state; | |
618 | u16 padding; | |
619 | ||
620 | /* | |
621 | * On new hosts that support VMBus protocol 5.0, we must use | |
622 | * VMBUS_MESSAGE_CONNECTION_ID_4 for the Initiate Contact Message, | |
623 | * and for subsequent messages, we must use the Message Connection ID | |
624 | * field in the host-returned Version Response Message. | |
625 | * | |
626 | * On old hosts, we should always use VMBUS_MESSAGE_CONNECTION_ID (1). | |
627 | */ | |
628 | u32 msg_conn_id; | |
b56dda06 S |
629 | } __packed; |
630 | ||
631 | enum vmbus_channel_state { | |
632 | CHANNEL_OFFER_STATE, | |
633 | CHANNEL_OPENING_STATE, | |
634 | CHANNEL_OPEN_STATE, | |
e68d2971 | 635 | CHANNEL_OPENED_STATE, |
b56dda06 S |
636 | }; |
637 | ||
b56dda06 S |
638 | /* |
639 | * Represents each channel msg on the vmbus connection This is a | |
640 | * variable-size data structure depending on the msg type itself | |
641 | */ | |
642 | struct vmbus_channel_msginfo { | |
643 | /* Bookkeeping stuff */ | |
644 | struct list_head msglistentry; | |
645 | ||
646 | /* So far, this is only used to handle gpadl body message */ | |
647 | struct list_head submsglist; | |
648 | ||
649 | /* Synchronize the request/response if needed */ | |
650 | struct completion waitevent; | |
ccb61f8a | 651 | struct vmbus_channel *waiting_channel; |
b56dda06 S |
652 | union { |
653 | struct vmbus_channel_version_supported version_supported; | |
654 | struct vmbus_channel_open_result open_result; | |
655 | struct vmbus_channel_gpadl_torndown gpadl_torndown; | |
656 | struct vmbus_channel_gpadl_created gpadl_created; | |
657 | struct vmbus_channel_version_response version_response; | |
658 | } response; | |
659 | ||
660 | u32 msgsize; | |
661 | /* | |
662 | * The channel message that goes out on the "wire". | |
663 | * It will contain at minimum the VMBUS_CHANNEL_MESSAGE_HEADER header | |
664 | */ | |
665 | unsigned char msg[0]; | |
666 | }; | |
667 | ||
f9f1db83 S |
668 | struct vmbus_close_msg { |
669 | struct vmbus_channel_msginfo info; | |
670 | struct vmbus_channel_close_channel msg; | |
671 | }; | |
672 | ||
b3bf60c7 S |
673 | /* Define connection identifier type. */ |
674 | union hv_connection_id { | |
675 | u32 asu32; | |
676 | struct { | |
677 | u32 id:24; | |
678 | u32 reserved:8; | |
679 | } u; | |
680 | }; | |
681 | ||
509879bd S |
682 | enum hv_numa_policy { |
683 | HV_BALANCED = 0, | |
684 | HV_LOCALIZED, | |
685 | }; | |
686 | ||
7047f17d S |
687 | enum vmbus_device_type { |
688 | HV_IDE = 0, | |
689 | HV_SCSI, | |
690 | HV_FC, | |
691 | HV_NIC, | |
692 | HV_ND, | |
693 | HV_PCIE, | |
694 | HV_FB, | |
695 | HV_KBD, | |
696 | HV_MOUSE, | |
697 | HV_KVP, | |
698 | HV_TS, | |
699 | HV_HB, | |
700 | HV_SHUTDOWN, | |
701 | HV_FCOPY, | |
702 | HV_BACKUP, | |
703 | HV_DM, | |
f45be72c | 704 | HV_UNKNOWN, |
7047f17d S |
705 | }; |
706 | ||
707 | struct vmbus_device { | |
708 | u16 dev_type; | |
593db803 | 709 | guid_t guid; |
7047f17d S |
710 | bool perf_device; |
711 | }; | |
712 | ||
7d7c75cd S |
713 | struct vmbus_channel { |
714 | struct list_head listentry; | |
715 | ||
716 | struct hv_device *device_obj; | |
717 | ||
7d7c75cd | 718 | enum vmbus_channel_state state; |
7d7c75cd S |
719 | |
720 | struct vmbus_channel_offer_channel offermsg; | |
721 | /* | |
722 | * These are based on the OfferMsg.MonitorId. | |
723 | * Save it here for easy access. | |
724 | */ | |
725 | u8 monitor_grp; | |
726 | u8 monitor_bit; | |
727 | ||
c3582a2c | 728 | bool rescind; /* got rescind msg */ |
7fa32e5e | 729 | struct completion rescind_event; |
c3582a2c | 730 | |
7d7c75cd S |
731 | u32 ringbuffer_gpadlhandle; |
732 | ||
733 | /* Allocated memory for ring buffer */ | |
52a42c2a | 734 | struct page *ringbuffer_page; |
7d7c75cd | 735 | u32 ringbuffer_pagecount; |
ae6935ed | 736 | u32 ringbuffer_send_offset; |
7d7c75cd S |
737 | struct hv_ring_buffer_info outbound; /* send to parent */ |
738 | struct hv_ring_buffer_info inbound; /* receive from parent */ | |
7d7c75cd | 739 | |
f9f1db83 S |
740 | struct vmbus_close_msg close_msg; |
741 | ||
6981fbf3 SH |
742 | /* Statistics */ |
743 | u64 interrupts; /* Host to Guest interrupts */ | |
744 | u64 sig_events; /* Guest to Host events */ | |
745 | ||
396ae57e KB |
746 | /* |
747 | * Guest to host interrupts caused by the outbound ring buffer changing | |
748 | * from empty to not empty. | |
749 | */ | |
750 | u64 intr_out_empty; | |
751 | ||
752 | /* | |
753 | * Indicates that a full outbound ring buffer was encountered. The flag | |
754 | * is set to true when a full outbound ring buffer is encountered and | |
755 | * set to false when a write to the outbound ring buffer is completed. | |
756 | */ | |
757 | bool out_full_flag; | |
758 | ||
51c6ce2a | 759 | /* Channel callback's invoked in softirq context */ |
631e63a9 | 760 | struct tasklet_struct callback_event; |
7d7c75cd S |
761 | void (*onchannel_callback)(void *context); |
762 | void *channel_callback_context; | |
132368bd S |
763 | |
764 | /* | |
b71e3282 SH |
765 | * A channel can be marked for one of three modes of reading: |
766 | * BATCHED - callback called from taslket and should read | |
767 | * channel until empty. Interrupts from the host | |
768 | * are masked while read is in process (default). | |
769 | * DIRECT - callback called from tasklet (softirq). | |
770 | * ISR - callback called in interrupt context and must | |
771 | * invoke its own deferred processing. | |
772 | * Host interrupts are disabled and must be re-enabled | |
773 | * when ring is empty. | |
132368bd | 774 | */ |
b71e3282 SH |
775 | enum hv_callback_mode { |
776 | HV_CALL_BATCHED, | |
777 | HV_CALL_DIRECT, | |
778 | HV_CALL_ISR | |
779 | } callback_mode; | |
b3bf60c7 S |
780 | |
781 | bool is_dedicated_interrupt; | |
05784171 | 782 | u64 sig_event; |
abbf3b2a S |
783 | |
784 | /* | |
785 | * Starting with win8, this field will be used to specify | |
786 | * the target virtual processor on which to deliver the interrupt for | |
787 | * the host to guest communication. | |
788 | * Prior to win8, incoming channel interrupts would only | |
789 | * be delivered on cpu 0. Setting this value to 0 would | |
790 | * preserve the earlier behavior. | |
791 | */ | |
792 | u32 target_vp; | |
d3ba720d S |
793 | /* The corresponding CPUID in the guest */ |
794 | u32 target_cpu; | |
1f656ff3 S |
795 | /* |
796 | * State to manage the CPU affiliation of channels. | |
797 | */ | |
3b71107d | 798 | struct cpumask alloced_cpus_in_node; |
1f656ff3 | 799 | int numa_node; |
e68d2971 S |
800 | /* |
801 | * Support for sub-channels. For high performance devices, | |
802 | * it will be useful to have multiple sub-channels to support | |
803 | * a scalable communication infrastructure with the host. | |
804 | * The support for sub-channels is implemented as an extention | |
805 | * to the current infrastructure. | |
806 | * The initial offer is considered the primary channel and this | |
807 | * offer message will indicate if the host supports sub-channels. | |
808 | * The guest is free to ask for sub-channels to be offerred and can | |
809 | * open these sub-channels as a normal "primary" channel. However, | |
810 | * all sub-channels will have the same type and instance guids as the | |
811 | * primary channel. Requests sent on a given channel will result in a | |
812 | * response on the same channel. | |
813 | */ | |
814 | ||
815 | /* | |
816 | * Sub-channel creation callback. This callback will be called in | |
817 | * process context when a sub-channel offer is received from the host. | |
818 | * The guest can open the sub-channel in the context of this callback. | |
819 | */ | |
820 | void (*sc_creation_callback)(struct vmbus_channel *new_sc); | |
821 | ||
499e8401 DC |
822 | /* |
823 | * Channel rescind callback. Some channels (the hvsock ones), need to | |
824 | * register a callback which is invoked in vmbus_onoffer_rescind(). | |
825 | */ | |
826 | void (*chn_rescind_callback)(struct vmbus_channel *channel); | |
827 | ||
67fae053 VK |
828 | /* |
829 | * The spinlock to protect the structure. It is being used to protect | |
830 | * test-and-set access to various attributes of the structure as well | |
831 | * as all sc_list operations. | |
832 | */ | |
833 | spinlock_t lock; | |
e68d2971 S |
834 | /* |
835 | * All Sub-channels of a primary channel are linked here. | |
836 | */ | |
837 | struct list_head sc_list; | |
838 | /* | |
839 | * The primary channel this sub-channel belongs to. | |
840 | * This will be NULL for the primary channel. | |
841 | */ | |
842 | struct vmbus_channel *primary_channel; | |
8a7206a8 S |
843 | /* |
844 | * Support per-channel state for use by vmbus drivers. | |
845 | */ | |
846 | void *per_channel_state; | |
3a28fa35 S |
847 | /* |
848 | * To support per-cpu lookup mapping of relid to channel, | |
849 | * link up channels based on their CPU affinity. | |
850 | */ | |
851 | struct list_head percpu_list; | |
8200f208 SH |
852 | |
853 | /* | |
854 | * Defer freeing channel until after all cpu's have | |
855 | * gone through grace period. | |
856 | */ | |
857 | struct rcu_head rcu; | |
858 | ||
c2e5df61 SH |
859 | /* |
860 | * For sysfs per-channel properties. | |
861 | */ | |
862 | struct kobject kobj; | |
863 | ||
3724287c S |
864 | /* |
865 | * For performance critical channels (storage, networking | |
866 | * etc,), Hyper-V has a mechanism to enhance the throughput | |
867 | * at the expense of latency: | |
868 | * When the host is to be signaled, we just set a bit in a shared page | |
869 | * and this bit will be inspected by the hypervisor within a certain | |
870 | * window and if the bit is set, the host will be signaled. The window | |
871 | * of time is the monitor latency - currently around 100 usecs. This | |
872 | * mechanism improves throughput by: | |
873 | * | |
874 | * A) Making the host more efficient - each time it wakes up, | |
875 | * potentially it will process morev number of packets. The | |
876 | * monitor latency allows a batch to build up. | |
877 | * B) By deferring the hypercall to signal, we will also minimize | |
878 | * the interrupts. | |
879 | * | |
880 | * Clearly, these optimizations improve throughput at the expense of | |
881 | * latency. Furthermore, since the channel is shared for both | |
882 | * control and data messages, control messages currently suffer | |
883 | * unnecessary latency adversley impacting performance and boot | |
884 | * time. To fix this issue, permit tagging the channel as being | |
885 | * in "low latency" mode. In this mode, we will bypass the monitor | |
886 | * mechanism. | |
887 | */ | |
888 | bool low_latency; | |
fe760e4d | 889 | |
509879bd S |
890 | /* |
891 | * NUMA distribution policy: | |
ce767047 | 892 | * We support two policies: |
509879bd S |
893 | * 1) Balanced: Here all performance critical channels are |
894 | * distributed evenly amongst all the NUMA nodes. | |
895 | * This policy will be the default policy. | |
896 | * 2) Localized: All channels of a given instance of a | |
897 | * performance critical service will be assigned CPUs | |
898 | * within a selected NUMA node. | |
899 | */ | |
900 | enum hv_numa_policy affinity_policy; | |
901 | ||
6f3d791f S |
902 | bool probe_done; |
903 | ||
37c2578c DC |
904 | /* |
905 | * We must offload the handling of the primary/sub channels | |
906 | * from the single-threaded vmbus_connection.work_queue to | |
907 | * two different workqueue, otherwise we can block | |
908 | * vmbus_connection.work_queue and hang: see vmbus_process_offer(). | |
909 | */ | |
910 | struct work_struct add_channel_work; | |
396ae57e KB |
911 | |
912 | /* | |
913 | * Guest to host interrupts caused by the inbound ring buffer changing | |
914 | * from full to not full while a packet is waiting. | |
915 | */ | |
916 | u64 intr_in_full; | |
917 | ||
918 | /* | |
919 | * The total number of write operations that encountered a full | |
920 | * outbound ring buffer. | |
921 | */ | |
922 | u64 out_full_total; | |
923 | ||
924 | /* | |
925 | * The number of write operations that were the first to encounter a | |
926 | * full outbound ring buffer. | |
927 | */ | |
928 | u64 out_full_first; | |
7d7c75cd | 929 | }; |
b56dda06 | 930 | |
e8d6ca02 DC |
931 | static inline bool is_hvsock_channel(const struct vmbus_channel *c) |
932 | { | |
933 | return !!(c->offermsg.offer.chn_flags & | |
934 | VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER); | |
935 | } | |
936 | ||
509879bd S |
937 | static inline void set_channel_affinity_state(struct vmbus_channel *c, |
938 | enum hv_numa_policy policy) | |
939 | { | |
940 | c->affinity_policy = policy; | |
941 | } | |
942 | ||
b71e3282 SH |
943 | static inline void set_channel_read_mode(struct vmbus_channel *c, |
944 | enum hv_callback_mode mode) | |
132368bd | 945 | { |
b71e3282 | 946 | c->callback_mode = mode; |
132368bd S |
947 | } |
948 | ||
8a7206a8 S |
949 | static inline void set_per_channel_state(struct vmbus_channel *c, void *s) |
950 | { | |
951 | c->per_channel_state = s; | |
952 | } | |
953 | ||
954 | static inline void *get_per_channel_state(struct vmbus_channel *c) | |
955 | { | |
956 | return c->per_channel_state; | |
957 | } | |
958 | ||
3c75354d DC |
959 | static inline void set_channel_pending_send_size(struct vmbus_channel *c, |
960 | u32 size) | |
961 | { | |
396ae57e KB |
962 | unsigned long flags; |
963 | ||
964 | if (size) { | |
965 | spin_lock_irqsave(&c->outbound.ring_lock, flags); | |
966 | ++c->out_full_total; | |
967 | ||
968 | if (!c->out_full_flag) { | |
969 | ++c->out_full_first; | |
970 | c->out_full_flag = true; | |
971 | } | |
972 | spin_unlock_irqrestore(&c->outbound.ring_lock, flags); | |
973 | } else { | |
974 | c->out_full_flag = false; | |
975 | } | |
976 | ||
3c75354d DC |
977 | c->outbound.ring_buffer->pending_send_sz = size; |
978 | } | |
979 | ||
3724287c S |
980 | static inline void set_low_latency_mode(struct vmbus_channel *c) |
981 | { | |
982 | c->low_latency = true; | |
983 | } | |
984 | ||
985 | static inline void clear_low_latency_mode(struct vmbus_channel *c) | |
986 | { | |
987 | c->low_latency = false; | |
988 | } | |
989 | ||
b56dda06 S |
990 | void vmbus_onmessage(void *context); |
991 | ||
992 | int vmbus_request_offers(void); | |
993 | ||
e68d2971 S |
994 | /* |
995 | * APIs for managing sub-channels. | |
996 | */ | |
997 | ||
998 | void vmbus_set_sc_create_callback(struct vmbus_channel *primary_channel, | |
999 | void (*sc_cr_cb)(struct vmbus_channel *new_sc)); | |
1000 | ||
499e8401 DC |
1001 | void vmbus_set_chn_rescind_callback(struct vmbus_channel *channel, |
1002 | void (*chn_rescind_cb)(struct vmbus_channel *)); | |
1003 | ||
e68d2971 S |
1004 | /* |
1005 | * Check if sub-channels have already been offerred. This API will be useful | |
1006 | * when the driver is unloaded after establishing sub-channels. In this case, | |
1007 | * when the driver is re-loaded, the driver would have to check if the | |
1008 | * subchannels have already been established before attempting to request | |
1009 | * the creation of sub-channels. | |
1010 | * This function returns TRUE to indicate that subchannels have already been | |
1011 | * created. | |
1012 | * This function should be invoked after setting the callback function for | |
1013 | * sub-channel creation. | |
1014 | */ | |
1015 | bool vmbus_are_subchannels_present(struct vmbus_channel *primary); | |
1016 | ||
c35470b2 S |
1017 | /* The format must be the same as struct vmdata_gpa_direct */ |
1018 | struct vmbus_channel_packet_page_buffer { | |
1019 | u16 type; | |
1020 | u16 dataoffset8; | |
1021 | u16 length8; | |
1022 | u16 flags; | |
1023 | u64 transactionid; | |
1024 | u32 reserved; | |
1025 | u32 rangecount; | |
1026 | struct hv_page_buffer range[MAX_PAGE_BUFFER_COUNT]; | |
1027 | } __packed; | |
1028 | ||
1029 | /* The format must be the same as struct vmdata_gpa_direct */ | |
1030 | struct vmbus_channel_packet_multipage_buffer { | |
1031 | u16 type; | |
1032 | u16 dataoffset8; | |
1033 | u16 length8; | |
1034 | u16 flags; | |
1035 | u64 transactionid; | |
1036 | u32 reserved; | |
1037 | u32 rangecount; /* Always 1 in this case */ | |
1038 | struct hv_multipage_buffer range; | |
1039 | } __packed; | |
1040 | ||
d61031ee S |
1041 | /* The format must be the same as struct vmdata_gpa_direct */ |
1042 | struct vmbus_packet_mpb_array { | |
1043 | u16 type; | |
1044 | u16 dataoffset8; | |
1045 | u16 length8; | |
1046 | u16 flags; | |
1047 | u64 transactionid; | |
1048 | u32 reserved; | |
1049 | u32 rangecount; /* Always 1 in this case */ | |
1050 | struct hv_mpb_array range; | |
1051 | } __packed; | |
1052 | ||
ae6935ed SH |
1053 | int vmbus_alloc_ring(struct vmbus_channel *channel, |
1054 | u32 send_size, u32 recv_size); | |
1055 | void vmbus_free_ring(struct vmbus_channel *channel); | |
1056 | ||
1057 | int vmbus_connect_ring(struct vmbus_channel *channel, | |
1058 | void (*onchannel_callback)(void *context), | |
1059 | void *context); | |
1060 | int vmbus_disconnect_ring(struct vmbus_channel *channel); | |
c35470b2 S |
1061 | |
1062 | extern int vmbus_open(struct vmbus_channel *channel, | |
1063 | u32 send_ringbuffersize, | |
1064 | u32 recv_ringbuffersize, | |
1065 | void *userdata, | |
1066 | u32 userdatalen, | |
2a9d7de2 | 1067 | void (*onchannel_callback)(void *context), |
c35470b2 S |
1068 | void *context); |
1069 | ||
1070 | extern void vmbus_close(struct vmbus_channel *channel); | |
1071 | ||
1072 | extern int vmbus_sendpacket(struct vmbus_channel *channel, | |
011a7c3c | 1073 | void *buffer, |
c35470b2 S |
1074 | u32 bufferLen, |
1075 | u64 requestid, | |
1076 | enum vmbus_packet_type type, | |
1077 | u32 flags); | |
1078 | ||
1079 | extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, | |
1080 | struct hv_page_buffer pagebuffers[], | |
1081 | u32 pagecount, | |
1082 | void *buffer, | |
1083 | u32 bufferlen, | |
1084 | u64 requestid); | |
1085 | ||
d61031ee S |
1086 | extern int vmbus_sendpacket_mpb_desc(struct vmbus_channel *channel, |
1087 | struct vmbus_packet_mpb_array *mpb, | |
1088 | u32 desc_size, | |
1089 | void *buffer, | |
1090 | u32 bufferlen, | |
1091 | u64 requestid); | |
1092 | ||
c35470b2 S |
1093 | extern int vmbus_establish_gpadl(struct vmbus_channel *channel, |
1094 | void *kbuffer, | |
1095 | u32 size, | |
1096 | u32 *gpadl_handle); | |
1097 | ||
1098 | extern int vmbus_teardown_gpadl(struct vmbus_channel *channel, | |
1099 | u32 gpadl_handle); | |
1100 | ||
d3b26dd7 DC |
1101 | void vmbus_reset_channel_cb(struct vmbus_channel *channel); |
1102 | ||
c35470b2 S |
1103 | extern int vmbus_recvpacket(struct vmbus_channel *channel, |
1104 | void *buffer, | |
1105 | u32 bufferlen, | |
1106 | u32 *buffer_actual_len, | |
1107 | u64 *requestid); | |
1108 | ||
1109 | extern int vmbus_recvpacket_raw(struct vmbus_channel *channel, | |
1110 | void *buffer, | |
1111 | u32 bufferlen, | |
1112 | u32 *buffer_actual_len, | |
1113 | u64 *requestid); | |
1114 | ||
c35470b2 | 1115 | |
c35470b2 S |
1116 | extern void vmbus_ontimer(unsigned long data); |
1117 | ||
35ea09c3 S |
1118 | /* Base driver object */ |
1119 | struct hv_driver { | |
1120 | const char *name; | |
1121 | ||
8981da32 DC |
1122 | /* |
1123 | * A hvsock offer, which has a VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER | |
1124 | * channel flag, actually doesn't mean a synthetic device because the | |
1125 | * offer's if_type/if_instance can change for every new hvsock | |
1126 | * connection. | |
1127 | * | |
1128 | * However, to facilitate the notification of new-offer/rescind-offer | |
1129 | * from vmbus driver to hvsock driver, we can handle hvsock offer as | |
1130 | * a special vmbus device, and hence we need the below flag to | |
1131 | * indicate if the driver is the hvsock driver or not: we need to | |
1132 | * specially treat the hvosck offer & driver in vmbus_match(). | |
1133 | */ | |
1134 | bool hvsock; | |
1135 | ||
35ea09c3 | 1136 | /* the device type supported by this driver */ |
593db803 | 1137 | guid_t dev_type; |
2e2c1d17 | 1138 | const struct hv_vmbus_device_id *id_table; |
35ea09c3 S |
1139 | |
1140 | struct device_driver driver; | |
1141 | ||
fc76936d SH |
1142 | /* dynamic device GUID's */ |
1143 | struct { | |
1144 | spinlock_t lock; | |
1145 | struct list_head list; | |
1146 | } dynids; | |
1147 | ||
84946899 | 1148 | int (*probe)(struct hv_device *, const struct hv_vmbus_device_id *); |
35ea09c3 S |
1149 | int (*remove)(struct hv_device *); |
1150 | void (*shutdown)(struct hv_device *); | |
1151 | ||
1152 | }; | |
1153 | ||
1154 | /* Base device object */ | |
1155 | struct hv_device { | |
1156 | /* the device type id of this device */ | |
593db803 | 1157 | guid_t dev_type; |
35ea09c3 S |
1158 | |
1159 | /* the device instance id of this device */ | |
593db803 | 1160 | guid_t dev_instance; |
7047f17d S |
1161 | u16 vendor_id; |
1162 | u16 device_id; | |
35ea09c3 S |
1163 | |
1164 | struct device device; | |
d765edbb | 1165 | char *driver_override; /* Driver name to force a match */ |
35ea09c3 S |
1166 | |
1167 | struct vmbus_channel *channel; | |
c2e5df61 | 1168 | struct kset *channels_kset; |
35ea09c3 S |
1169 | }; |
1170 | ||
27b5b3ca S |
1171 | |
1172 | static inline struct hv_device *device_to_hv_device(struct device *d) | |
1173 | { | |
1174 | return container_of(d, struct hv_device, device); | |
1175 | } | |
1176 | ||
1177 | static inline struct hv_driver *drv_to_hv_drv(struct device_driver *d) | |
1178 | { | |
1179 | return container_of(d, struct hv_driver, driver); | |
1180 | } | |
1181 | ||
ab101e86 S |
1182 | static inline void hv_set_drvdata(struct hv_device *dev, void *data) |
1183 | { | |
1184 | dev_set_drvdata(&dev->device, data); | |
1185 | } | |
1186 | ||
1187 | static inline void *hv_get_drvdata(struct hv_device *dev) | |
1188 | { | |
1189 | return dev_get_drvdata(&dev->device); | |
1190 | } | |
27b5b3ca | 1191 | |
4827ee1d SH |
1192 | struct hv_ring_buffer_debug_info { |
1193 | u32 current_interrupt_mask; | |
1194 | u32 current_read_index; | |
1195 | u32 current_write_index; | |
1196 | u32 bytes_avail_toread; | |
1197 | u32 bytes_avail_towrite; | |
1198 | }; | |
1199 | ||
ba50bf1c | 1200 | |
14948e39 | 1201 | int hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info, |
ba50bf1c | 1202 | struct hv_ring_buffer_debug_info *debug_info); |
4827ee1d | 1203 | |
27b5b3ca | 1204 | /* Vmbus interface */ |
768fa219 GKH |
1205 | #define vmbus_driver_register(driver) \ |
1206 | __vmbus_driver_register(driver, THIS_MODULE, KBUILD_MODNAME) | |
1207 | int __must_check __vmbus_driver_register(struct hv_driver *hv_driver, | |
1208 | struct module *owner, | |
1209 | const char *mod_name); | |
1210 | void vmbus_driver_unregister(struct hv_driver *hv_driver); | |
27b5b3ca | 1211 | |
85d9aa70 DC |
1212 | void vmbus_hvsock_device_unregister(struct vmbus_channel *channel); |
1213 | ||
35464483 JO |
1214 | int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj, |
1215 | resource_size_t min, resource_size_t max, | |
1216 | resource_size_t size, resource_size_t align, | |
1217 | bool fb_overlap_ok); | |
97fb77dc | 1218 | void vmbus_free_mmio(resource_size_t start, resource_size_t size); |
619848bd | 1219 | |
7fb96565 S |
1220 | /* |
1221 | * GUID definitions of various offer types - services offered to the guest. | |
1222 | */ | |
1223 | ||
1224 | /* | |
1225 | * Network GUID | |
1226 | * {f8615163-df3e-46c5-913f-f2d2f965ed0e} | |
1227 | */ | |
1228 | #define HV_NIC_GUID \ | |
593db803 AS |
1229 | .guid = GUID_INIT(0xf8615163, 0xdf3e, 0x46c5, 0x91, 0x3f, \ |
1230 | 0xf2, 0xd2, 0xf9, 0x65, 0xed, 0x0e) | |
7fb96565 S |
1231 | |
1232 | /* | |
1233 | * IDE GUID | |
1234 | * {32412632-86cb-44a2-9b5c-50d1417354f5} | |
1235 | */ | |
1236 | #define HV_IDE_GUID \ | |
593db803 AS |
1237 | .guid = GUID_INIT(0x32412632, 0x86cb, 0x44a2, 0x9b, 0x5c, \ |
1238 | 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5) | |
7fb96565 S |
1239 | |
1240 | /* | |
1241 | * SCSI GUID | |
1242 | * {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} | |
1243 | */ | |
1244 | #define HV_SCSI_GUID \ | |
593db803 AS |
1245 | .guid = GUID_INIT(0xba6163d9, 0x04a1, 0x4d29, 0xb6, 0x05, \ |
1246 | 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f) | |
7fb96565 S |
1247 | |
1248 | /* | |
1249 | * Shutdown GUID | |
1250 | * {0e0b6031-5213-4934-818b-38d90ced39db} | |
1251 | */ | |
1252 | #define HV_SHUTDOWN_GUID \ | |
593db803 AS |
1253 | .guid = GUID_INIT(0x0e0b6031, 0x5213, 0x4934, 0x81, 0x8b, \ |
1254 | 0x38, 0xd9, 0x0c, 0xed, 0x39, 0xdb) | |
7fb96565 S |
1255 | |
1256 | /* | |
1257 | * Time Synch GUID | |
1258 | * {9527E630-D0AE-497b-ADCE-E80AB0175CAF} | |
1259 | */ | |
1260 | #define HV_TS_GUID \ | |
593db803 AS |
1261 | .guid = GUID_INIT(0x9527e630, 0xd0ae, 0x497b, 0xad, 0xce, \ |
1262 | 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf) | |
7fb96565 S |
1263 | |
1264 | /* | |
1265 | * Heartbeat GUID | |
1266 | * {57164f39-9115-4e78-ab55-382f3bd5422d} | |
1267 | */ | |
1268 | #define HV_HEART_BEAT_GUID \ | |
593db803 AS |
1269 | .guid = GUID_INIT(0x57164f39, 0x9115, 0x4e78, 0xab, 0x55, \ |
1270 | 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d) | |
7fb96565 S |
1271 | |
1272 | /* | |
1273 | * KVP GUID | |
1274 | * {a9a0f4e7-5a45-4d96-b827-8a841e8c03e6} | |
1275 | */ | |
1276 | #define HV_KVP_GUID \ | |
593db803 AS |
1277 | .guid = GUID_INIT(0xa9a0f4e7, 0x5a45, 0x4d96, 0xb8, 0x27, \ |
1278 | 0x8a, 0x84, 0x1e, 0x8c, 0x03, 0xe6) | |
7fb96565 S |
1279 | |
1280 | /* | |
1281 | * Dynamic memory GUID | |
1282 | * {525074dc-8985-46e2-8057-a307dc18a502} | |
1283 | */ | |
1284 | #define HV_DM_GUID \ | |
593db803 AS |
1285 | .guid = GUID_INIT(0x525074dc, 0x8985, 0x46e2, 0x80, 0x57, \ |
1286 | 0xa3, 0x07, 0xdc, 0x18, 0xa5, 0x02) | |
7fb96565 S |
1287 | |
1288 | /* | |
1289 | * Mouse GUID | |
1290 | * {cfa8b69e-5b4a-4cc0-b98b-8ba1a1f3f95a} | |
1291 | */ | |
1292 | #define HV_MOUSE_GUID \ | |
593db803 AS |
1293 | .guid = GUID_INIT(0xcfa8b69e, 0x5b4a, 0x4cc0, 0xb9, 0x8b, \ |
1294 | 0x8b, 0xa1, 0xa1, 0xf3, 0xf9, 0x5a) | |
7fb96565 | 1295 | |
2048157a DC |
1296 | /* |
1297 | * Keyboard GUID | |
1298 | * {f912ad6d-2b17-48ea-bd65-f927a61c7684} | |
1299 | */ | |
1300 | #define HV_KBD_GUID \ | |
593db803 AS |
1301 | .guid = GUID_INIT(0xf912ad6d, 0x2b17, 0x48ea, 0xbd, 0x65, \ |
1302 | 0xf9, 0x27, 0xa6, 0x1c, 0x76, 0x84) | |
2048157a | 1303 | |
96dd86fa S |
1304 | /* |
1305 | * VSS (Backup/Restore) GUID | |
1306 | */ | |
1307 | #define HV_VSS_GUID \ | |
593db803 AS |
1308 | .guid = GUID_INIT(0x35fa2e29, 0xea23, 0x4236, 0x96, 0xae, \ |
1309 | 0x3a, 0x6e, 0xba, 0xcb, 0xa4, 0x40) | |
68a2d20b HZ |
1310 | /* |
1311 | * Synthetic Video GUID | |
1312 | * {DA0A7802-E377-4aac-8E77-0558EB1073F8} | |
1313 | */ | |
1314 | #define HV_SYNTHVID_GUID \ | |
593db803 AS |
1315 | .guid = GUID_INIT(0xda0a7802, 0xe377, 0x4aac, 0x8e, 0x77, \ |
1316 | 0x05, 0x58, 0xeb, 0x10, 0x73, 0xf8) | |
68a2d20b | 1317 | |
98b80d89 S |
1318 | /* |
1319 | * Synthetic FC GUID | |
1320 | * {2f9bcc4a-0069-4af3-b76b-6fd0be528cda} | |
1321 | */ | |
1322 | #define HV_SYNTHFC_GUID \ | |
593db803 AS |
1323 | .guid = GUID_INIT(0x2f9bcc4a, 0x0069, 0x4af3, 0xb7, 0x6b, \ |
1324 | 0x6f, 0xd0, 0xbe, 0x52, 0x8c, 0xda) | |
98b80d89 | 1325 | |
01325476 S |
1326 | /* |
1327 | * Guest File Copy Service | |
1328 | * {34D14BE3-DEE4-41c8-9AE7-6B174977C192} | |
1329 | */ | |
1330 | ||
1331 | #define HV_FCOPY_GUID \ | |
593db803 AS |
1332 | .guid = GUID_INIT(0x34d14be3, 0xdee4, 0x41c8, 0x9a, 0xe7, \ |
1333 | 0x6b, 0x17, 0x49, 0x77, 0xc1, 0x92) | |
01325476 | 1334 | |
04653a00 S |
1335 | /* |
1336 | * NetworkDirect. This is the guest RDMA service. | |
1337 | * {8c2eaf3d-32a7-4b09-ab99-bd1f1c86b501} | |
1338 | */ | |
1339 | #define HV_ND_GUID \ | |
593db803 AS |
1340 | .guid = GUID_INIT(0x8c2eaf3d, 0x32a7, 0x4b09, 0xab, 0x99, \ |
1341 | 0xbd, 0x1f, 0x1c, 0x86, 0xb5, 0x01) | |
04653a00 | 1342 | |
3053c762 JO |
1343 | /* |
1344 | * PCI Express Pass Through | |
1345 | * {44C4F61D-4444-4400-9D52-802E27EDE19F} | |
1346 | */ | |
1347 | ||
1348 | #define HV_PCIE_GUID \ | |
593db803 AS |
1349 | .guid = GUID_INIT(0x44c4f61d, 0x4444, 0x4400, 0x9d, 0x52, \ |
1350 | 0x80, 0x2e, 0x27, 0xed, 0xe1, 0x9f) | |
3053c762 | 1351 | |
0f98829a DC |
1352 | /* |
1353 | * Linux doesn't support the 3 devices: the first two are for | |
1354 | * Automatic Virtual Machine Activation, and the third is for | |
1355 | * Remote Desktop Virtualization. | |
1356 | * {f8e65716-3cb3-4a06-9a60-1889c5cccab5} | |
1357 | * {3375baf4-9e15-4b30-b765-67acb10d607b} | |
1358 | * {276aacf4-ac15-426c-98dd-7521ad3f01fe} | |
1359 | */ | |
1360 | ||
1361 | #define HV_AVMA1_GUID \ | |
593db803 AS |
1362 | .guid = GUID_INIT(0xf8e65716, 0x3cb3, 0x4a06, 0x9a, 0x60, \ |
1363 | 0x18, 0x89, 0xc5, 0xcc, 0xca, 0xb5) | |
0f98829a DC |
1364 | |
1365 | #define HV_AVMA2_GUID \ | |
593db803 AS |
1366 | .guid = GUID_INIT(0x3375baf4, 0x9e15, 0x4b30, 0xb7, 0x65, \ |
1367 | 0x67, 0xac, 0xb1, 0x0d, 0x60, 0x7b) | |
0f98829a DC |
1368 | |
1369 | #define HV_RDV_GUID \ | |
593db803 AS |
1370 | .guid = GUID_INIT(0x276aacf4, 0xac15, 0x426c, 0x98, 0xdd, \ |
1371 | 0x75, 0x21, 0xad, 0x3f, 0x01, 0xfe) | |
0f98829a | 1372 | |
b189702d S |
1373 | /* |
1374 | * Common header for Hyper-V ICs | |
1375 | */ | |
1376 | ||
1377 | #define ICMSGTYPE_NEGOTIATE 0 | |
1378 | #define ICMSGTYPE_HEARTBEAT 1 | |
1379 | #define ICMSGTYPE_KVPEXCHANGE 2 | |
1380 | #define ICMSGTYPE_SHUTDOWN 3 | |
1381 | #define ICMSGTYPE_TIMESYNC 4 | |
1382 | #define ICMSGTYPE_VSS 5 | |
1383 | ||
1384 | #define ICMSGHDRFLAG_TRANSACTION 1 | |
1385 | #define ICMSGHDRFLAG_REQUEST 2 | |
1386 | #define ICMSGHDRFLAG_RESPONSE 4 | |
1387 | ||
b189702d | 1388 | |
a29b643c S |
1389 | /* |
1390 | * While we want to handle util services as regular devices, | |
1391 | * there is only one instance of each of these services; so | |
1392 | * we statically allocate the service specific state. | |
1393 | */ | |
1394 | ||
1395 | struct hv_util_service { | |
1396 | u8 *recv_buffer; | |
b9830d12 | 1397 | void *channel; |
a29b643c S |
1398 | void (*util_cb)(void *); |
1399 | int (*util_init)(struct hv_util_service *); | |
1400 | void (*util_deinit)(void); | |
1401 | }; | |
1402 | ||
b189702d S |
1403 | struct vmbuspipe_hdr { |
1404 | u32 flags; | |
1405 | u32 msgsize; | |
1406 | } __packed; | |
1407 | ||
1408 | struct ic_version { | |
1409 | u16 major; | |
1410 | u16 minor; | |
1411 | } __packed; | |
1412 | ||
1413 | struct icmsg_hdr { | |
1414 | struct ic_version icverframe; | |
1415 | u16 icmsgtype; | |
1416 | struct ic_version icvermsg; | |
1417 | u16 icmsgsize; | |
1418 | u32 status; | |
1419 | u8 ictransaction_id; | |
1420 | u8 icflags; | |
1421 | u8 reserved[2]; | |
1422 | } __packed; | |
1423 | ||
1424 | struct icmsg_negotiate { | |
1425 | u16 icframe_vercnt; | |
1426 | u16 icmsg_vercnt; | |
1427 | u32 reserved; | |
1428 | struct ic_version icversion_data[1]; /* any size array */ | |
1429 | } __packed; | |
1430 | ||
1431 | struct shutdown_msg_data { | |
1432 | u32 reason_code; | |
1433 | u32 timeout_seconds; | |
1434 | u32 flags; | |
1435 | u8 display_message[2048]; | |
1436 | } __packed; | |
1437 | ||
1438 | struct heartbeat_msg_data { | |
1439 | u64 seq_num; | |
1440 | u32 reserved[8]; | |
1441 | } __packed; | |
1442 | ||
1443 | /* Time Sync IC defs */ | |
1444 | #define ICTIMESYNCFLAG_PROBE 0 | |
1445 | #define ICTIMESYNCFLAG_SYNC 1 | |
1446 | #define ICTIMESYNCFLAG_SAMPLE 2 | |
1447 | ||
1448 | #ifdef __x86_64__ | |
1449 | #define WLTIMEDELTA 116444736000000000L /* in 100ns unit */ | |
1450 | #else | |
1451 | #define WLTIMEDELTA 116444736000000000LL | |
1452 | #endif | |
1453 | ||
1454 | struct ictimesync_data { | |
1455 | u64 parenttime; | |
1456 | u64 childtime; | |
1457 | u64 roundtriptime; | |
1458 | u8 flags; | |
1459 | } __packed; | |
1460 | ||
8e1d2607 AN |
1461 | struct ictimesync_ref_data { |
1462 | u64 parenttime; | |
1463 | u64 vmreferencetime; | |
1464 | u8 flags; | |
1465 | char leapflags; | |
1466 | char stratum; | |
1467 | u8 reserved[3]; | |
1468 | } __packed; | |
1469 | ||
b189702d S |
1470 | struct hyperv_service_callback { |
1471 | u8 msg_type; | |
1472 | char *log_msg; | |
593db803 | 1473 | guid_t data; |
b189702d | 1474 | struct vmbus_channel *channel; |
2a9d7de2 | 1475 | void (*callback)(void *context); |
b189702d S |
1476 | }; |
1477 | ||
c836d0ab | 1478 | #define MAX_SRV_VER 0x7ffffff |
a1656454 AN |
1479 | extern bool vmbus_prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, u8 *buf, |
1480 | const int *fw_version, int fw_vercnt, | |
1481 | const int *srv_version, int srv_vercnt, | |
1482 | int *nego_fw_version, int *nego_srv_version); | |
b189702d | 1483 | |
800b9329 | 1484 | void hv_process_channel_removal(struct vmbus_channel *channel); |
96dd86fa | 1485 | |
1f6ee4e7 | 1486 | void vmbus_setevent(struct vmbus_channel *channel); |
37f7278b S |
1487 | /* |
1488 | * Negotiated version with the Host. | |
1489 | */ | |
1490 | ||
1491 | extern __u32 vmbus_proto_version; | |
1492 | ||
593db803 AS |
1493 | int vmbus_send_tl_connect_request(const guid_t *shv_guest_servie_id, |
1494 | const guid_t *shv_host_servie_id); | |
5cc47247 | 1495 | void vmbus_set_event(struct vmbus_channel *channel); |
687f32e6 S |
1496 | |
1497 | /* Get the start of the ring buffer. */ | |
1498 | static inline void * | |
e4165a0f | 1499 | hv_get_ring_buffer(const struct hv_ring_buffer_info *ring_info) |
687f32e6 | 1500 | { |
e4165a0f | 1501 | return ring_info->ring_buffer->buffer; |
687f32e6 S |
1502 | } |
1503 | ||
6e47dd3e SH |
1504 | /* |
1505 | * Mask off host interrupt callback notifications | |
1506 | */ | |
1507 | static inline void hv_begin_read(struct hv_ring_buffer_info *rbi) | |
1508 | { | |
1509 | rbi->ring_buffer->interrupt_mask = 1; | |
1510 | ||
1511 | /* make sure mask update is not reordered */ | |
1512 | virt_mb(); | |
1513 | } | |
1514 | ||
1515 | /* | |
1516 | * Re-enable host callback and return number of outstanding bytes | |
1517 | */ | |
1518 | static inline u32 hv_end_read(struct hv_ring_buffer_info *rbi) | |
1519 | { | |
1520 | ||
1521 | rbi->ring_buffer->interrupt_mask = 0; | |
1522 | ||
1523 | /* make sure mask update is not reordered */ | |
1524 | virt_mb(); | |
1525 | ||
1526 | /* | |
1527 | * Now check to see if the ring buffer is still empty. | |
1528 | * If it is not, we raced and we need to process new | |
1529 | * incoming messages. | |
1530 | */ | |
1531 | return hv_get_bytes_to_read(rbi); | |
1532 | } | |
1533 | ||
ab028db4 S |
1534 | /* |
1535 | * An API to support in-place processing of incoming VMBUS packets. | |
1536 | */ | |
ab028db4 | 1537 | |
f3dd3f47 | 1538 | /* Get data payload associated with descriptor */ |
1539 | static inline void *hv_pkt_data(const struct vmpacket_descriptor *desc) | |
ab028db4 | 1540 | { |
f3dd3f47 | 1541 | return (void *)((unsigned long)desc + (desc->offset8 << 3)); |
ab028db4 S |
1542 | } |
1543 | ||
f3dd3f47 | 1544 | /* Get data size associated with descriptor */ |
1545 | static inline u32 hv_pkt_datalen(const struct vmpacket_descriptor *desc) | |
ab028db4 | 1546 | { |
f3dd3f47 | 1547 | return (desc->len8 << 3) - (desc->offset8 << 3); |
ab028db4 S |
1548 | } |
1549 | ||
f3dd3f47 | 1550 | |
1551 | struct vmpacket_descriptor * | |
1552 | hv_pkt_iter_first(struct vmbus_channel *channel); | |
1553 | ||
1554 | struct vmpacket_descriptor * | |
1555 | __hv_pkt_iter_next(struct vmbus_channel *channel, | |
1556 | const struct vmpacket_descriptor *pkt); | |
1557 | ||
1558 | void hv_pkt_iter_close(struct vmbus_channel *channel); | |
1559 | ||
ab028db4 | 1560 | /* |
f3dd3f47 | 1561 | * Get next packet descriptor from iterator |
1562 | * If at end of list, return NULL and update host. | |
ab028db4 | 1563 | */ |
f3dd3f47 | 1564 | static inline struct vmpacket_descriptor * |
1565 | hv_pkt_iter_next(struct vmbus_channel *channel, | |
1566 | const struct vmpacket_descriptor *pkt) | |
ab028db4 | 1567 | { |
f3dd3f47 | 1568 | struct vmpacket_descriptor *nxt; |
1569 | ||
1570 | nxt = __hv_pkt_iter_next(channel, pkt); | |
1571 | if (!nxt) | |
1572 | hv_pkt_iter_close(channel); | |
ab028db4 | 1573 | |
f3dd3f47 | 1574 | return nxt; |
ab028db4 S |
1575 | } |
1576 | ||
f3dd3f47 | 1577 | #define foreach_vmbus_pkt(pkt, channel) \ |
1578 | for (pkt = hv_pkt_iter_first(channel); pkt; \ | |
1579 | pkt = hv_pkt_iter_next(channel, pkt)) | |
ab028db4 | 1580 | |
3f335ea2 | 1581 | #endif /* _HYPERV_H */ |