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5c473400 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 | */ | |
3f335ea2 S |
24 | |
25 | #ifndef _HYPERV_H | |
26 | #define _HYPERV_H | |
27 | ||
5267cf02 | 28 | #include <uapi/linux/hyperv.h> |
2939437c | 29 | |
5267cf02 | 30 | #include <linux/types.h> |
8ff3e6fc S |
31 | #include <linux/scatterlist.h> |
32 | #include <linux/list.h> | |
33 | #include <linux/timer.h> | |
8ff3e6fc S |
34 | #include <linux/completion.h> |
35 | #include <linux/device.h> | |
2e2c1d17 | 36 | #include <linux/mod_devicetable.h> |
631e63a9 | 37 | #include <linux/interrupt.h> |
63273cb4 | 38 | #include <linux/reciprocal_div.h> |
8ff3e6fc | 39 | |
7e5ec368 | 40 | #define MAX_PAGE_BUFFER_COUNT 32 |
a363bf7b S |
41 | #define MAX_MULTIPAGE_BUFFER_COUNT 32 /* 128K */ |
42 | ||
43 | #pragma pack(push, 1) | |
44 | ||
45 | /* Single-page buffer */ | |
46 | struct hv_page_buffer { | |
47 | u32 len; | |
48 | u32 offset; | |
49 | u64 pfn; | |
50 | }; | |
51 | ||
52 | /* Multiple-page buffer */ | |
53 | struct hv_multipage_buffer { | |
54 | /* Length and Offset determines the # of pfns in the array */ | |
55 | u32 len; | |
56 | u32 offset; | |
57 | u64 pfn_array[MAX_MULTIPAGE_BUFFER_COUNT]; | |
58 | }; | |
59 | ||
d61031ee S |
60 | /* |
61 | * Multiple-page buffer array; the pfn array is variable size: | |
62 | * The number of entries in the PFN array is determined by | |
63 | * "len" and "offset". | |
64 | */ | |
65 | struct hv_mpb_array { | |
66 | /* Length and Offset determines the # of pfns in the array */ | |
67 | u32 len; | |
68 | u32 offset; | |
69 | u64 pfn_array[]; | |
70 | }; | |
71 | ||
a363bf7b S |
72 | /* 0x18 includes the proprietary packet header */ |
73 | #define MAX_PAGE_BUFFER_PACKET (0x18 + \ | |
74 | (sizeof(struct hv_page_buffer) * \ | |
75 | MAX_PAGE_BUFFER_COUNT)) | |
76 | #define MAX_MULTIPAGE_BUFFER_PACKET (0x18 + \ | |
77 | sizeof(struct hv_multipage_buffer)) | |
78 | ||
79 | ||
80 | #pragma pack(pop) | |
81 | ||
7effffb7 S |
82 | struct hv_ring_buffer { |
83 | /* Offset in bytes from the start of ring data below */ | |
84 | u32 write_index; | |
85 | ||
86 | /* Offset in bytes from the start of ring data below */ | |
87 | u32 read_index; | |
88 | ||
89 | u32 interrupt_mask; | |
90 | ||
2416603e | 91 | /* |
71b38245 MK |
92 | * WS2012/Win8 and later versions of Hyper-V implement interrupt |
93 | * driven flow management. The feature bit feat_pending_send_sz | |
94 | * is set by the host on the host->guest ring buffer, and by the | |
95 | * guest on the guest->host ring buffer. | |
2416603e | 96 | * |
71b38245 MK |
97 | * The meaning of the feature bit is a bit complex in that it has |
98 | * semantics that apply to both ring buffers. If the guest sets | |
99 | * the feature bit in the guest->host ring buffer, the guest is | |
100 | * telling the host that: | |
101 | * 1) It will set the pending_send_sz field in the guest->host ring | |
102 | * buffer when it is waiting for space to become available, and | |
103 | * 2) It will read the pending_send_sz field in the host->guest | |
104 | * ring buffer and interrupt the host when it frees enough space | |
105 | * | |
106 | * Similarly, if the host sets the feature bit in the host->guest | |
107 | * ring buffer, the host is telling the guest that: | |
108 | * 1) It will set the pending_send_sz field in the host->guest ring | |
109 | * buffer when it is waiting for space to become available, and | |
110 | * 2) It will read the pending_send_sz field in the guest->host | |
111 | * ring buffer and interrupt the guest when it frees enough space | |
112 | * | |
113 | * If either the guest or host does not set the feature bit that it | |
114 | * owns, that guest or host must do polling if it encounters a full | |
115 | * ring buffer, and not signal the other end with an interrupt. | |
7effffb7 | 116 | */ |
2416603e | 117 | u32 pending_send_sz; |
2416603e | 118 | u32 reserved1[12]; |
2416603e S |
119 | union { |
120 | struct { | |
121 | u32 feat_pending_send_sz:1; | |
122 | }; | |
123 | u32 value; | |
124 | } feature_bits; | |
125 | ||
126 | /* Pad it to PAGE_SIZE so that data starts on page boundary */ | |
127 | u8 reserved2[4028]; | |
7effffb7 S |
128 | |
129 | /* | |
130 | * Ring data starts here + RingDataStartOffset | |
131 | * !!! DO NOT place any fields below this !!! | |
132 | */ | |
133 | u8 buffer[0]; | |
134 | } __packed; | |
135 | ||
136 | struct hv_ring_buffer_info { | |
137 | struct hv_ring_buffer *ring_buffer; | |
138 | u32 ring_size; /* Include the shared header */ | |
63273cb4 | 139 | struct reciprocal_value ring_size_div10_reciprocal; |
7effffb7 S |
140 | spinlock_t ring_lock; |
141 | ||
142 | u32 ring_datasize; /* < ring_size */ | |
ab028db4 | 143 | u32 priv_read_index; |
7effffb7 S |
144 | }; |
145 | ||
33be96e4 | 146 | |
e4165a0f | 147 | static inline u32 hv_get_bytes_to_read(const struct hv_ring_buffer_info *rbi) |
a6341f00 S |
148 | { |
149 | u32 read_loc, write_loc, dsize, read; | |
150 | ||
151 | dsize = rbi->ring_datasize; | |
152 | read_loc = rbi->ring_buffer->read_index; | |
153 | write_loc = READ_ONCE(rbi->ring_buffer->write_index); | |
154 | ||
155 | read = write_loc >= read_loc ? (write_loc - read_loc) : | |
156 | (dsize - read_loc) + write_loc; | |
157 | ||
158 | return read; | |
159 | } | |
160 | ||
e4165a0f | 161 | static inline u32 hv_get_bytes_to_write(const struct hv_ring_buffer_info *rbi) |
a6341f00 S |
162 | { |
163 | u32 read_loc, write_loc, dsize, write; | |
164 | ||
165 | dsize = rbi->ring_datasize; | |
166 | read_loc = READ_ONCE(rbi->ring_buffer->read_index); | |
167 | write_loc = rbi->ring_buffer->write_index; | |
168 | ||
169 | write = write_loc >= read_loc ? dsize - (write_loc - read_loc) : | |
170 | read_loc - write_loc; | |
171 | return write; | |
172 | } | |
173 | ||
63273cb4 LL |
174 | static inline u32 hv_get_avail_to_write_percent( |
175 | const struct hv_ring_buffer_info *rbi) | |
176 | { | |
177 | u32 avail_write = hv_get_bytes_to_write(rbi); | |
178 | ||
179 | return reciprocal_divide( | |
180 | (avail_write << 3) + (avail_write << 1), | |
181 | rbi->ring_size_div10_reciprocal); | |
182 | } | |
183 | ||
eafa7072 S |
184 | /* |
185 | * VMBUS version is 32 bit entity broken up into | |
186 | * two 16 bit quantities: major_number. minor_number. | |
187 | * | |
188 | * 0 . 13 (Windows Server 2008) | |
189 | * 1 . 1 (Windows 7) | |
190 | * 2 . 4 (Windows 8) | |
03367ef5 | 191 | * 3 . 0 (Windows 8 R2) |
6c4e5f9c | 192 | * 4 . 0 (Windows 10) |
ae20b254 | 193 | * 5 . 0 (Newer Windows 10) |
eafa7072 S |
194 | */ |
195 | ||
196 | #define VERSION_WS2008 ((0 << 16) | (13)) | |
197 | #define VERSION_WIN7 ((1 << 16) | (1)) | |
198 | #define VERSION_WIN8 ((2 << 16) | (4)) | |
03367ef5 | 199 | #define VERSION_WIN8_1 ((3 << 16) | (0)) |
6c4e5f9c | 200 | #define VERSION_WIN10 ((4 << 16) | (0)) |
ae20b254 | 201 | #define VERSION_WIN10_V5 ((5 << 16) | (0)) |
eafa7072 S |
202 | |
203 | #define VERSION_INVAL -1 | |
204 | ||
ae20b254 | 205 | #define VERSION_CURRENT VERSION_WIN10_V5 |
f7c6dfda | 206 | |
517d8dc6 S |
207 | /* Make maximum size of pipe payload of 16K */ |
208 | #define MAX_PIPE_DATA_PAYLOAD (sizeof(u8) * 16384) | |
209 | ||
210 | /* Define PipeMode values. */ | |
211 | #define VMBUS_PIPE_TYPE_BYTE 0x00000000 | |
212 | #define VMBUS_PIPE_TYPE_MESSAGE 0x00000004 | |
213 | ||
214 | /* The size of the user defined data buffer for non-pipe offers. */ | |
215 | #define MAX_USER_DEFINED_BYTES 120 | |
216 | ||
217 | /* The size of the user defined data buffer for pipe offers. */ | |
218 | #define MAX_PIPE_USER_DEFINED_BYTES 116 | |
219 | ||
220 | /* | |
221 | * At the center of the Channel Management library is the Channel Offer. This | |
222 | * struct contains the fundamental information about an offer. | |
223 | */ | |
224 | struct vmbus_channel_offer { | |
358d2ee2 S |
225 | uuid_le if_type; |
226 | uuid_le if_instance; | |
29423b7e S |
227 | |
228 | /* | |
229 | * These two fields are not currently used. | |
230 | */ | |
231 | u64 reserved1; | |
232 | u64 reserved2; | |
233 | ||
517d8dc6 S |
234 | u16 chn_flags; |
235 | u16 mmio_megabytes; /* in bytes * 1024 * 1024 */ | |
236 | ||
237 | union { | |
238 | /* Non-pipes: The user has MAX_USER_DEFINED_BYTES bytes. */ | |
239 | struct { | |
240 | unsigned char user_def[MAX_USER_DEFINED_BYTES]; | |
241 | } std; | |
242 | ||
243 | /* | |
244 | * Pipes: | |
245 | * The following sructure is an integrated pipe protocol, which | |
246 | * is implemented on top of standard user-defined data. Pipe | |
247 | * clients have MAX_PIPE_USER_DEFINED_BYTES left for their own | |
248 | * use. | |
249 | */ | |
250 | struct { | |
251 | u32 pipe_mode; | |
252 | unsigned char user_def[MAX_PIPE_USER_DEFINED_BYTES]; | |
253 | } pipe; | |
254 | } u; | |
29423b7e S |
255 | /* |
256 | * The sub_channel_index is defined in win8. | |
257 | */ | |
258 | u16 sub_channel_index; | |
259 | u16 reserved3; | |
517d8dc6 S |
260 | } __packed; |
261 | ||
262 | /* Server Flags */ | |
263 | #define VMBUS_CHANNEL_ENUMERATE_DEVICE_INTERFACE 1 | |
264 | #define VMBUS_CHANNEL_SERVER_SUPPORTS_TRANSFER_PAGES 2 | |
265 | #define VMBUS_CHANNEL_SERVER_SUPPORTS_GPADLS 4 | |
266 | #define VMBUS_CHANNEL_NAMED_PIPE_MODE 0x10 | |
267 | #define VMBUS_CHANNEL_LOOPBACK_OFFER 0x100 | |
268 | #define VMBUS_CHANNEL_PARENT_OFFER 0x200 | |
269 | #define VMBUS_CHANNEL_REQUEST_MONITORED_NOTIFICATION 0x400 | |
e8d6ca02 | 270 | #define VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER 0x2000 |
517d8dc6 | 271 | |
50ed40e0 S |
272 | struct vmpacket_descriptor { |
273 | u16 type; | |
274 | u16 offset8; | |
275 | u16 len8; | |
276 | u16 flags; | |
277 | u64 trans_id; | |
278 | } __packed; | |
279 | ||
280 | struct vmpacket_header { | |
281 | u32 prev_pkt_start_offset; | |
282 | struct vmpacket_descriptor descriptor; | |
283 | } __packed; | |
284 | ||
285 | struct vmtransfer_page_range { | |
286 | u32 byte_count; | |
287 | u32 byte_offset; | |
288 | } __packed; | |
289 | ||
290 | struct vmtransfer_page_packet_header { | |
291 | struct vmpacket_descriptor d; | |
292 | u16 xfer_pageset_id; | |
1508d811 | 293 | u8 sender_owns_set; |
50ed40e0 S |
294 | u8 reserved; |
295 | u32 range_cnt; | |
296 | struct vmtransfer_page_range ranges[1]; | |
297 | } __packed; | |
298 | ||
299 | struct vmgpadl_packet_header { | |
300 | struct vmpacket_descriptor d; | |
301 | u32 gpadl; | |
302 | u32 reserved; | |
303 | } __packed; | |
304 | ||
305 | struct vmadd_remove_transfer_page_set { | |
306 | struct vmpacket_descriptor d; | |
307 | u32 gpadl; | |
308 | u16 xfer_pageset_id; | |
309 | u16 reserved; | |
310 | } __packed; | |
311 | ||
312 | /* | |
313 | * This structure defines a range in guest physical space that can be made to | |
314 | * look virtually contiguous. | |
315 | */ | |
316 | struct gpa_range { | |
317 | u32 byte_count; | |
318 | u32 byte_offset; | |
319 | u64 pfn_array[0]; | |
320 | }; | |
321 | ||
322 | /* | |
323 | * This is the format for an Establish Gpadl packet, which contains a handle by | |
324 | * which this GPADL will be known and a set of GPA ranges associated with it. | |
325 | * This can be converted to a MDL by the guest OS. If there are multiple GPA | |
326 | * ranges, then the resulting MDL will be "chained," representing multiple VA | |
327 | * ranges. | |
328 | */ | |
329 | struct vmestablish_gpadl { | |
330 | struct vmpacket_descriptor d; | |
331 | u32 gpadl; | |
332 | u32 range_cnt; | |
333 | struct gpa_range range[1]; | |
334 | } __packed; | |
335 | ||
336 | /* | |
337 | * This is the format for a Teardown Gpadl packet, which indicates that the | |
338 | * GPADL handle in the Establish Gpadl packet will never be referenced again. | |
339 | */ | |
340 | struct vmteardown_gpadl { | |
341 | struct vmpacket_descriptor d; | |
342 | u32 gpadl; | |
343 | u32 reserved; /* for alignment to a 8-byte boundary */ | |
344 | } __packed; | |
345 | ||
346 | /* | |
347 | * This is the format for a GPA-Direct packet, which contains a set of GPA | |
348 | * ranges, in addition to commands and/or data. | |
349 | */ | |
350 | struct vmdata_gpa_direct { | |
351 | struct vmpacket_descriptor d; | |
352 | u32 reserved; | |
353 | u32 range_cnt; | |
354 | struct gpa_range range[1]; | |
355 | } __packed; | |
356 | ||
357 | /* This is the format for a Additional Data Packet. */ | |
358 | struct vmadditional_data { | |
359 | struct vmpacket_descriptor d; | |
360 | u64 total_bytes; | |
361 | u32 offset; | |
362 | u32 byte_cnt; | |
363 | unsigned char data[1]; | |
364 | } __packed; | |
365 | ||
366 | union vmpacket_largest_possible_header { | |
367 | struct vmpacket_descriptor simple_hdr; | |
368 | struct vmtransfer_page_packet_header xfer_page_hdr; | |
369 | struct vmgpadl_packet_header gpadl_hdr; | |
370 | struct vmadd_remove_transfer_page_set add_rm_xfer_page_hdr; | |
371 | struct vmestablish_gpadl establish_gpadl_hdr; | |
372 | struct vmteardown_gpadl teardown_gpadl_hdr; | |
373 | struct vmdata_gpa_direct data_gpa_direct_hdr; | |
374 | }; | |
375 | ||
376 | #define VMPACKET_DATA_START_ADDRESS(__packet) \ | |
377 | (void *)(((unsigned char *)__packet) + \ | |
378 | ((struct vmpacket_descriptor)__packet)->offset8 * 8) | |
379 | ||
380 | #define VMPACKET_DATA_LENGTH(__packet) \ | |
381 | ((((struct vmpacket_descriptor)__packet)->len8 - \ | |
382 | ((struct vmpacket_descriptor)__packet)->offset8) * 8) | |
383 | ||
384 | #define VMPACKET_TRANSFER_MODE(__packet) \ | |
385 | (((struct IMPACT)__packet)->type) | |
386 | ||
387 | enum vmbus_packet_type { | |
388 | VM_PKT_INVALID = 0x0, | |
389 | VM_PKT_SYNCH = 0x1, | |
390 | VM_PKT_ADD_XFER_PAGESET = 0x2, | |
391 | VM_PKT_RM_XFER_PAGESET = 0x3, | |
392 | VM_PKT_ESTABLISH_GPADL = 0x4, | |
393 | VM_PKT_TEARDOWN_GPADL = 0x5, | |
394 | VM_PKT_DATA_INBAND = 0x6, | |
395 | VM_PKT_DATA_USING_XFER_PAGES = 0x7, | |
396 | VM_PKT_DATA_USING_GPADL = 0x8, | |
397 | VM_PKT_DATA_USING_GPA_DIRECT = 0x9, | |
398 | VM_PKT_CANCEL_REQUEST = 0xa, | |
399 | VM_PKT_COMP = 0xb, | |
400 | VM_PKT_DATA_USING_ADDITIONAL_PKT = 0xc, | |
401 | VM_PKT_ADDITIONAL_DATA = 0xd | |
402 | }; | |
403 | ||
404 | #define VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED 1 | |
517d8dc6 | 405 | |
b56dda06 | 406 | |
b56dda06 S |
407 | /* Version 1 messages */ |
408 | enum vmbus_channel_message_type { | |
409 | CHANNELMSG_INVALID = 0, | |
410 | CHANNELMSG_OFFERCHANNEL = 1, | |
411 | CHANNELMSG_RESCIND_CHANNELOFFER = 2, | |
412 | CHANNELMSG_REQUESTOFFERS = 3, | |
413 | CHANNELMSG_ALLOFFERS_DELIVERED = 4, | |
414 | CHANNELMSG_OPENCHANNEL = 5, | |
415 | CHANNELMSG_OPENCHANNEL_RESULT = 6, | |
416 | CHANNELMSG_CLOSECHANNEL = 7, | |
417 | CHANNELMSG_GPADL_HEADER = 8, | |
418 | CHANNELMSG_GPADL_BODY = 9, | |
419 | CHANNELMSG_GPADL_CREATED = 10, | |
420 | CHANNELMSG_GPADL_TEARDOWN = 11, | |
421 | CHANNELMSG_GPADL_TORNDOWN = 12, | |
422 | CHANNELMSG_RELID_RELEASED = 13, | |
423 | CHANNELMSG_INITIATE_CONTACT = 14, | |
424 | CHANNELMSG_VERSION_RESPONSE = 15, | |
425 | CHANNELMSG_UNLOAD = 16, | |
2db84eff | 426 | CHANNELMSG_UNLOAD_RESPONSE = 17, |
5c23a1a5 DC |
427 | CHANNELMSG_18 = 18, |
428 | CHANNELMSG_19 = 19, | |
429 | CHANNELMSG_20 = 20, | |
430 | CHANNELMSG_TL_CONNECT_REQUEST = 21, | |
b56dda06 S |
431 | CHANNELMSG_COUNT |
432 | }; | |
433 | ||
434 | struct vmbus_channel_message_header { | |
435 | enum vmbus_channel_message_type msgtype; | |
436 | u32 padding; | |
437 | } __packed; | |
438 | ||
439 | /* Query VMBus Version parameters */ | |
440 | struct vmbus_channel_query_vmbus_version { | |
441 | struct vmbus_channel_message_header header; | |
442 | u32 version; | |
443 | } __packed; | |
444 | ||
445 | /* VMBus Version Supported parameters */ | |
446 | struct vmbus_channel_version_supported { | |
447 | struct vmbus_channel_message_header header; | |
1508d811 | 448 | u8 version_supported; |
b56dda06 S |
449 | } __packed; |
450 | ||
451 | /* Offer Channel parameters */ | |
452 | struct vmbus_channel_offer_channel { | |
453 | struct vmbus_channel_message_header header; | |
454 | struct vmbus_channel_offer offer; | |
455 | u32 child_relid; | |
456 | u8 monitorid; | |
29423b7e S |
457 | /* |
458 | * win7 and beyond splits this field into a bit field. | |
459 | */ | |
460 | u8 monitor_allocated:1; | |
461 | u8 reserved:7; | |
462 | /* | |
463 | * These are new fields added in win7 and later. | |
464 | * Do not access these fields without checking the | |
465 | * negotiated protocol. | |
466 | * | |
467 | * If "is_dedicated_interrupt" is set, we must not set the | |
468 | * associated bit in the channel bitmap while sending the | |
469 | * interrupt to the host. | |
470 | * | |
471 | * connection_id is to be used in signaling the host. | |
472 | */ | |
473 | u16 is_dedicated_interrupt:1; | |
474 | u16 reserved1:15; | |
475 | u32 connection_id; | |
b56dda06 S |
476 | } __packed; |
477 | ||
478 | /* Rescind Offer parameters */ | |
479 | struct vmbus_channel_rescind_offer { | |
480 | struct vmbus_channel_message_header header; | |
481 | u32 child_relid; | |
482 | } __packed; | |
483 | ||
4827ee1d SH |
484 | static inline u32 |
485 | hv_ringbuffer_pending_size(const struct hv_ring_buffer_info *rbi) | |
486 | { | |
487 | return rbi->ring_buffer->pending_send_sz; | |
488 | } | |
489 | ||
b56dda06 S |
490 | /* |
491 | * Request Offer -- no parameters, SynIC message contains the partition ID | |
492 | * Set Snoop -- no parameters, SynIC message contains the partition ID | |
493 | * Clear Snoop -- no parameters, SynIC message contains the partition ID | |
494 | * All Offers Delivered -- no parameters, SynIC message contains the partition | |
495 | * ID | |
496 | * Flush Client -- no parameters, SynIC message contains the partition ID | |
497 | */ | |
498 | ||
499 | /* Open Channel parameters */ | |
500 | struct vmbus_channel_open_channel { | |
501 | struct vmbus_channel_message_header header; | |
502 | ||
503 | /* Identifies the specific VMBus channel that is being opened. */ | |
504 | u32 child_relid; | |
505 | ||
506 | /* ID making a particular open request at a channel offer unique. */ | |
507 | u32 openid; | |
508 | ||
509 | /* GPADL for the channel's ring buffer. */ | |
510 | u32 ringbuffer_gpadlhandle; | |
511 | ||
abbf3b2a S |
512 | /* |
513 | * Starting with win8, this field will be used to specify | |
514 | * the target virtual processor on which to deliver the interrupt for | |
515 | * the host to guest communication. | |
516 | * Prior to win8, incoming channel interrupts would only | |
517 | * be delivered on cpu 0. Setting this value to 0 would | |
518 | * preserve the earlier behavior. | |
519 | */ | |
520 | u32 target_vp; | |
b56dda06 S |
521 | |
522 | /* | |
2a9d7de2 SH |
523 | * The upstream ring buffer begins at offset zero in the memory |
524 | * described by RingBufferGpadlHandle. The downstream ring buffer | |
525 | * follows it at this offset (in pages). | |
526 | */ | |
b56dda06 S |
527 | u32 downstream_ringbuffer_pageoffset; |
528 | ||
529 | /* User-specific data to be passed along to the server endpoint. */ | |
530 | unsigned char userdata[MAX_USER_DEFINED_BYTES]; | |
531 | } __packed; | |
532 | ||
533 | /* Open Channel Result parameters */ | |
534 | struct vmbus_channel_open_result { | |
535 | struct vmbus_channel_message_header header; | |
536 | u32 child_relid; | |
537 | u32 openid; | |
538 | u32 status; | |
539 | } __packed; | |
540 | ||
541 | /* Close channel parameters; */ | |
542 | struct vmbus_channel_close_channel { | |
543 | struct vmbus_channel_message_header header; | |
544 | u32 child_relid; | |
545 | } __packed; | |
546 | ||
547 | /* Channel Message GPADL */ | |
548 | #define GPADL_TYPE_RING_BUFFER 1 | |
549 | #define GPADL_TYPE_SERVER_SAVE_AREA 2 | |
550 | #define GPADL_TYPE_TRANSACTION 8 | |
551 | ||
552 | /* | |
553 | * The number of PFNs in a GPADL message is defined by the number of | |
554 | * pages that would be spanned by ByteCount and ByteOffset. If the | |
555 | * implied number of PFNs won't fit in this packet, there will be a | |
556 | * follow-up packet that contains more. | |
557 | */ | |
558 | struct vmbus_channel_gpadl_header { | |
559 | struct vmbus_channel_message_header header; | |
560 | u32 child_relid; | |
561 | u32 gpadl; | |
562 | u16 range_buflen; | |
563 | u16 rangecount; | |
564 | struct gpa_range range[0]; | |
565 | } __packed; | |
566 | ||
567 | /* This is the followup packet that contains more PFNs. */ | |
568 | struct vmbus_channel_gpadl_body { | |
569 | struct vmbus_channel_message_header header; | |
570 | u32 msgnumber; | |
571 | u32 gpadl; | |
572 | u64 pfn[0]; | |
573 | } __packed; | |
574 | ||
575 | struct vmbus_channel_gpadl_created { | |
576 | struct vmbus_channel_message_header header; | |
577 | u32 child_relid; | |
578 | u32 gpadl; | |
579 | u32 creation_status; | |
580 | } __packed; | |
581 | ||
582 | struct vmbus_channel_gpadl_teardown { | |
583 | struct vmbus_channel_message_header header; | |
584 | u32 child_relid; | |
585 | u32 gpadl; | |
586 | } __packed; | |
587 | ||
588 | struct vmbus_channel_gpadl_torndown { | |
589 | struct vmbus_channel_message_header header; | |
590 | u32 gpadl; | |
591 | } __packed; | |
592 | ||
b56dda06 S |
593 | struct vmbus_channel_relid_released { |
594 | struct vmbus_channel_message_header header; | |
595 | u32 child_relid; | |
596 | } __packed; | |
597 | ||
598 | struct vmbus_channel_initiate_contact { | |
599 | struct vmbus_channel_message_header header; | |
600 | u32 vmbus_version_requested; | |
e28bab48 | 601 | u32 target_vcpu; /* The VCPU the host should respond to */ |
ae20b254 DC |
602 | union { |
603 | u64 interrupt_page; | |
604 | struct { | |
605 | u8 msg_sint; | |
606 | u8 padding1[3]; | |
607 | u32 padding2; | |
608 | }; | |
609 | }; | |
b56dda06 S |
610 | u64 monitor_page1; |
611 | u64 monitor_page2; | |
612 | } __packed; | |
613 | ||
5c23a1a5 DC |
614 | /* Hyper-V socket: guest's connect()-ing to host */ |
615 | struct vmbus_channel_tl_connect_request { | |
616 | struct vmbus_channel_message_header header; | |
617 | uuid_le guest_endpoint_id; | |
618 | uuid_le host_service_id; | |
619 | } __packed; | |
620 | ||
b56dda06 S |
621 | struct vmbus_channel_version_response { |
622 | struct vmbus_channel_message_header header; | |
1508d811 | 623 | u8 version_supported; |
ae20b254 DC |
624 | |
625 | u8 connection_state; | |
626 | u16 padding; | |
627 | ||
628 | /* | |
629 | * On new hosts that support VMBus protocol 5.0, we must use | |
630 | * VMBUS_MESSAGE_CONNECTION_ID_4 for the Initiate Contact Message, | |
631 | * and for subsequent messages, we must use the Message Connection ID | |
632 | * field in the host-returned Version Response Message. | |
633 | * | |
634 | * On old hosts, we should always use VMBUS_MESSAGE_CONNECTION_ID (1). | |
635 | */ | |
636 | u32 msg_conn_id; | |
b56dda06 S |
637 | } __packed; |
638 | ||
639 | enum vmbus_channel_state { | |
640 | CHANNEL_OFFER_STATE, | |
641 | CHANNEL_OPENING_STATE, | |
642 | CHANNEL_OPEN_STATE, | |
e68d2971 | 643 | CHANNEL_OPENED_STATE, |
b56dda06 S |
644 | }; |
645 | ||
b56dda06 S |
646 | /* |
647 | * Represents each channel msg on the vmbus connection This is a | |
648 | * variable-size data structure depending on the msg type itself | |
649 | */ | |
650 | struct vmbus_channel_msginfo { | |
651 | /* Bookkeeping stuff */ | |
652 | struct list_head msglistentry; | |
653 | ||
654 | /* So far, this is only used to handle gpadl body message */ | |
655 | struct list_head submsglist; | |
656 | ||
657 | /* Synchronize the request/response if needed */ | |
658 | struct completion waitevent; | |
ccb61f8a | 659 | struct vmbus_channel *waiting_channel; |
b56dda06 S |
660 | union { |
661 | struct vmbus_channel_version_supported version_supported; | |
662 | struct vmbus_channel_open_result open_result; | |
663 | struct vmbus_channel_gpadl_torndown gpadl_torndown; | |
664 | struct vmbus_channel_gpadl_created gpadl_created; | |
665 | struct vmbus_channel_version_response version_response; | |
666 | } response; | |
667 | ||
668 | u32 msgsize; | |
669 | /* | |
670 | * The channel message that goes out on the "wire". | |
671 | * It will contain at minimum the VMBUS_CHANNEL_MESSAGE_HEADER header | |
672 | */ | |
673 | unsigned char msg[0]; | |
674 | }; | |
675 | ||
f9f1db83 S |
676 | struct vmbus_close_msg { |
677 | struct vmbus_channel_msginfo info; | |
678 | struct vmbus_channel_close_channel msg; | |
679 | }; | |
680 | ||
b3bf60c7 S |
681 | /* Define connection identifier type. */ |
682 | union hv_connection_id { | |
683 | u32 asu32; | |
684 | struct { | |
685 | u32 id:24; | |
686 | u32 reserved:8; | |
687 | } u; | |
688 | }; | |
689 | ||
509879bd S |
690 | enum hv_numa_policy { |
691 | HV_BALANCED = 0, | |
692 | HV_LOCALIZED, | |
693 | }; | |
694 | ||
7047f17d S |
695 | enum vmbus_device_type { |
696 | HV_IDE = 0, | |
697 | HV_SCSI, | |
698 | HV_FC, | |
699 | HV_NIC, | |
700 | HV_ND, | |
701 | HV_PCIE, | |
702 | HV_FB, | |
703 | HV_KBD, | |
704 | HV_MOUSE, | |
705 | HV_KVP, | |
706 | HV_TS, | |
707 | HV_HB, | |
708 | HV_SHUTDOWN, | |
709 | HV_FCOPY, | |
710 | HV_BACKUP, | |
711 | HV_DM, | |
f45be72c | 712 | HV_UNKNOWN, |
7047f17d S |
713 | }; |
714 | ||
715 | struct vmbus_device { | |
716 | u16 dev_type; | |
717 | uuid_le guid; | |
718 | bool perf_device; | |
719 | }; | |
720 | ||
7d7c75cd S |
721 | struct vmbus_channel { |
722 | struct list_head listentry; | |
723 | ||
724 | struct hv_device *device_obj; | |
725 | ||
7d7c75cd | 726 | enum vmbus_channel_state state; |
7d7c75cd S |
727 | |
728 | struct vmbus_channel_offer_channel offermsg; | |
729 | /* | |
730 | * These are based on the OfferMsg.MonitorId. | |
731 | * Save it here for easy access. | |
732 | */ | |
733 | u8 monitor_grp; | |
734 | u8 monitor_bit; | |
735 | ||
c3582a2c | 736 | bool rescind; /* got rescind msg */ |
7fa32e5e | 737 | struct completion rescind_event; |
c3582a2c | 738 | |
7d7c75cd S |
739 | u32 ringbuffer_gpadlhandle; |
740 | ||
741 | /* Allocated memory for ring buffer */ | |
52a42c2a | 742 | struct page *ringbuffer_page; |
7d7c75cd | 743 | u32 ringbuffer_pagecount; |
ae6935ed | 744 | u32 ringbuffer_send_offset; |
7d7c75cd S |
745 | struct hv_ring_buffer_info outbound; /* send to parent */ |
746 | struct hv_ring_buffer_info inbound; /* receive from parent */ | |
7d7c75cd | 747 | |
f9f1db83 S |
748 | struct vmbus_close_msg close_msg; |
749 | ||
6981fbf3 SH |
750 | /* Statistics */ |
751 | u64 interrupts; /* Host to Guest interrupts */ | |
752 | u64 sig_events; /* Guest to Host events */ | |
753 | ||
51c6ce2a | 754 | /* Channel callback's invoked in softirq context */ |
631e63a9 | 755 | struct tasklet_struct callback_event; |
7d7c75cd S |
756 | void (*onchannel_callback)(void *context); |
757 | void *channel_callback_context; | |
132368bd S |
758 | |
759 | /* | |
b71e3282 SH |
760 | * A channel can be marked for one of three modes of reading: |
761 | * BATCHED - callback called from taslket and should read | |
762 | * channel until empty. Interrupts from the host | |
763 | * are masked while read is in process (default). | |
764 | * DIRECT - callback called from tasklet (softirq). | |
765 | * ISR - callback called in interrupt context and must | |
766 | * invoke its own deferred processing. | |
767 | * Host interrupts are disabled and must be re-enabled | |
768 | * when ring is empty. | |
132368bd | 769 | */ |
b71e3282 SH |
770 | enum hv_callback_mode { |
771 | HV_CALL_BATCHED, | |
772 | HV_CALL_DIRECT, | |
773 | HV_CALL_ISR | |
774 | } callback_mode; | |
b3bf60c7 S |
775 | |
776 | bool is_dedicated_interrupt; | |
05784171 | 777 | u64 sig_event; |
abbf3b2a S |
778 | |
779 | /* | |
780 | * Starting with win8, this field will be used to specify | |
781 | * the target virtual processor on which to deliver the interrupt for | |
782 | * the host to guest communication. | |
783 | * Prior to win8, incoming channel interrupts would only | |
784 | * be delivered on cpu 0. Setting this value to 0 would | |
785 | * preserve the earlier behavior. | |
786 | */ | |
787 | u32 target_vp; | |
d3ba720d S |
788 | /* The corresponding CPUID in the guest */ |
789 | u32 target_cpu; | |
1f656ff3 S |
790 | /* |
791 | * State to manage the CPU affiliation of channels. | |
792 | */ | |
3b71107d | 793 | struct cpumask alloced_cpus_in_node; |
1f656ff3 | 794 | int numa_node; |
e68d2971 S |
795 | /* |
796 | * Support for sub-channels. For high performance devices, | |
797 | * it will be useful to have multiple sub-channels to support | |
798 | * a scalable communication infrastructure with the host. | |
799 | * The support for sub-channels is implemented as an extention | |
800 | * to the current infrastructure. | |
801 | * The initial offer is considered the primary channel and this | |
802 | * offer message will indicate if the host supports sub-channels. | |
803 | * The guest is free to ask for sub-channels to be offerred and can | |
804 | * open these sub-channels as a normal "primary" channel. However, | |
805 | * all sub-channels will have the same type and instance guids as the | |
806 | * primary channel. Requests sent on a given channel will result in a | |
807 | * response on the same channel. | |
808 | */ | |
809 | ||
810 | /* | |
811 | * Sub-channel creation callback. This callback will be called in | |
812 | * process context when a sub-channel offer is received from the host. | |
813 | * The guest can open the sub-channel in the context of this callback. | |
814 | */ | |
815 | void (*sc_creation_callback)(struct vmbus_channel *new_sc); | |
816 | ||
499e8401 DC |
817 | /* |
818 | * Channel rescind callback. Some channels (the hvsock ones), need to | |
819 | * register a callback which is invoked in vmbus_onoffer_rescind(). | |
820 | */ | |
821 | void (*chn_rescind_callback)(struct vmbus_channel *channel); | |
822 | ||
67fae053 VK |
823 | /* |
824 | * The spinlock to protect the structure. It is being used to protect | |
825 | * test-and-set access to various attributes of the structure as well | |
826 | * as all sc_list operations. | |
827 | */ | |
828 | spinlock_t lock; | |
e68d2971 S |
829 | /* |
830 | * All Sub-channels of a primary channel are linked here. | |
831 | */ | |
832 | struct list_head sc_list; | |
fea844a2 VK |
833 | /* |
834 | * Current number of sub-channels. | |
835 | */ | |
836 | int num_sc; | |
837 | /* | |
838 | * Number of a sub-channel (position within sc_list) which is supposed | |
839 | * to be used as the next outgoing channel. | |
840 | */ | |
841 | int next_oc; | |
e68d2971 S |
842 | /* |
843 | * The primary channel this sub-channel belongs to. | |
844 | * This will be NULL for the primary channel. | |
845 | */ | |
846 | struct vmbus_channel *primary_channel; | |
8a7206a8 S |
847 | /* |
848 | * Support per-channel state for use by vmbus drivers. | |
849 | */ | |
850 | void *per_channel_state; | |
3a28fa35 S |
851 | /* |
852 | * To support per-cpu lookup mapping of relid to channel, | |
853 | * link up channels based on their CPU affinity. | |
854 | */ | |
855 | struct list_head percpu_list; | |
8200f208 SH |
856 | |
857 | /* | |
858 | * Defer freeing channel until after all cpu's have | |
859 | * gone through grace period. | |
860 | */ | |
861 | struct rcu_head rcu; | |
862 | ||
c2e5df61 SH |
863 | /* |
864 | * For sysfs per-channel properties. | |
865 | */ | |
866 | struct kobject kobj; | |
867 | ||
3724287c S |
868 | /* |
869 | * For performance critical channels (storage, networking | |
870 | * etc,), Hyper-V has a mechanism to enhance the throughput | |
871 | * at the expense of latency: | |
872 | * When the host is to be signaled, we just set a bit in a shared page | |
873 | * and this bit will be inspected by the hypervisor within a certain | |
874 | * window and if the bit is set, the host will be signaled. The window | |
875 | * of time is the monitor latency - currently around 100 usecs. This | |
876 | * mechanism improves throughput by: | |
877 | * | |
878 | * A) Making the host more efficient - each time it wakes up, | |
879 | * potentially it will process morev number of packets. The | |
880 | * monitor latency allows a batch to build up. | |
881 | * B) By deferring the hypercall to signal, we will also minimize | |
882 | * the interrupts. | |
883 | * | |
884 | * Clearly, these optimizations improve throughput at the expense of | |
885 | * latency. Furthermore, since the channel is shared for both | |
886 | * control and data messages, control messages currently suffer | |
887 | * unnecessary latency adversley impacting performance and boot | |
888 | * time. To fix this issue, permit tagging the channel as being | |
889 | * in "low latency" mode. In this mode, we will bypass the monitor | |
890 | * mechanism. | |
891 | */ | |
892 | bool low_latency; | |
fe760e4d | 893 | |
509879bd S |
894 | /* |
895 | * NUMA distribution policy: | |
ce767047 | 896 | * We support two policies: |
509879bd S |
897 | * 1) Balanced: Here all performance critical channels are |
898 | * distributed evenly amongst all the NUMA nodes. | |
899 | * This policy will be the default policy. | |
900 | * 2) Localized: All channels of a given instance of a | |
901 | * performance critical service will be assigned CPUs | |
902 | * within a selected NUMA node. | |
903 | */ | |
904 | enum hv_numa_policy affinity_policy; | |
905 | ||
6f3d791f S |
906 | bool probe_done; |
907 | ||
7d7c75cd | 908 | }; |
b56dda06 | 909 | |
e8d6ca02 DC |
910 | static inline bool is_hvsock_channel(const struct vmbus_channel *c) |
911 | { | |
912 | return !!(c->offermsg.offer.chn_flags & | |
913 | VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER); | |
914 | } | |
915 | ||
509879bd S |
916 | static inline void set_channel_affinity_state(struct vmbus_channel *c, |
917 | enum hv_numa_policy policy) | |
918 | { | |
919 | c->affinity_policy = policy; | |
920 | } | |
921 | ||
b71e3282 SH |
922 | static inline void set_channel_read_mode(struct vmbus_channel *c, |
923 | enum hv_callback_mode mode) | |
132368bd | 924 | { |
b71e3282 | 925 | c->callback_mode = mode; |
132368bd S |
926 | } |
927 | ||
8a7206a8 S |
928 | static inline void set_per_channel_state(struct vmbus_channel *c, void *s) |
929 | { | |
930 | c->per_channel_state = s; | |
931 | } | |
932 | ||
933 | static inline void *get_per_channel_state(struct vmbus_channel *c) | |
934 | { | |
935 | return c->per_channel_state; | |
936 | } | |
937 | ||
3c75354d DC |
938 | static inline void set_channel_pending_send_size(struct vmbus_channel *c, |
939 | u32 size) | |
940 | { | |
941 | c->outbound.ring_buffer->pending_send_sz = size; | |
942 | } | |
943 | ||
3724287c S |
944 | static inline void set_low_latency_mode(struct vmbus_channel *c) |
945 | { | |
946 | c->low_latency = true; | |
947 | } | |
948 | ||
949 | static inline void clear_low_latency_mode(struct vmbus_channel *c) | |
950 | { | |
951 | c->low_latency = false; | |
952 | } | |
953 | ||
b56dda06 S |
954 | void vmbus_onmessage(void *context); |
955 | ||
956 | int vmbus_request_offers(void); | |
957 | ||
e68d2971 S |
958 | /* |
959 | * APIs for managing sub-channels. | |
960 | */ | |
961 | ||
962 | void vmbus_set_sc_create_callback(struct vmbus_channel *primary_channel, | |
963 | void (*sc_cr_cb)(struct vmbus_channel *new_sc)); | |
964 | ||
499e8401 DC |
965 | void vmbus_set_chn_rescind_callback(struct vmbus_channel *channel, |
966 | void (*chn_rescind_cb)(struct vmbus_channel *)); | |
967 | ||
e68d2971 S |
968 | /* |
969 | * Retrieve the (sub) channel on which to send an outgoing request. | |
970 | * When a primary channel has multiple sub-channels, we choose a | |
971 | * channel whose VCPU binding is closest to the VCPU on which | |
972 | * this call is being made. | |
973 | */ | |
974 | struct vmbus_channel *vmbus_get_outgoing_channel(struct vmbus_channel *primary); | |
975 | ||
976 | /* | |
977 | * Check if sub-channels have already been offerred. This API will be useful | |
978 | * when the driver is unloaded after establishing sub-channels. In this case, | |
979 | * when the driver is re-loaded, the driver would have to check if the | |
980 | * subchannels have already been established before attempting to request | |
981 | * the creation of sub-channels. | |
982 | * This function returns TRUE to indicate that subchannels have already been | |
983 | * created. | |
984 | * This function should be invoked after setting the callback function for | |
985 | * sub-channel creation. | |
986 | */ | |
987 | bool vmbus_are_subchannels_present(struct vmbus_channel *primary); | |
988 | ||
c35470b2 S |
989 | /* The format must be the same as struct vmdata_gpa_direct */ |
990 | struct vmbus_channel_packet_page_buffer { | |
991 | u16 type; | |
992 | u16 dataoffset8; | |
993 | u16 length8; | |
994 | u16 flags; | |
995 | u64 transactionid; | |
996 | u32 reserved; | |
997 | u32 rangecount; | |
998 | struct hv_page_buffer range[MAX_PAGE_BUFFER_COUNT]; | |
999 | } __packed; | |
1000 | ||
1001 | /* The format must be the same as struct vmdata_gpa_direct */ | |
1002 | struct vmbus_channel_packet_multipage_buffer { | |
1003 | u16 type; | |
1004 | u16 dataoffset8; | |
1005 | u16 length8; | |
1006 | u16 flags; | |
1007 | u64 transactionid; | |
1008 | u32 reserved; | |
1009 | u32 rangecount; /* Always 1 in this case */ | |
1010 | struct hv_multipage_buffer range; | |
1011 | } __packed; | |
1012 | ||
d61031ee S |
1013 | /* The format must be the same as struct vmdata_gpa_direct */ |
1014 | struct vmbus_packet_mpb_array { | |
1015 | u16 type; | |
1016 | u16 dataoffset8; | |
1017 | u16 length8; | |
1018 | u16 flags; | |
1019 | u64 transactionid; | |
1020 | u32 reserved; | |
1021 | u32 rangecount; /* Always 1 in this case */ | |
1022 | struct hv_mpb_array range; | |
1023 | } __packed; | |
1024 | ||
ae6935ed SH |
1025 | int vmbus_alloc_ring(struct vmbus_channel *channel, |
1026 | u32 send_size, u32 recv_size); | |
1027 | void vmbus_free_ring(struct vmbus_channel *channel); | |
1028 | ||
1029 | int vmbus_connect_ring(struct vmbus_channel *channel, | |
1030 | void (*onchannel_callback)(void *context), | |
1031 | void *context); | |
1032 | int vmbus_disconnect_ring(struct vmbus_channel *channel); | |
c35470b2 S |
1033 | |
1034 | extern int vmbus_open(struct vmbus_channel *channel, | |
1035 | u32 send_ringbuffersize, | |
1036 | u32 recv_ringbuffersize, | |
1037 | void *userdata, | |
1038 | u32 userdatalen, | |
2a9d7de2 | 1039 | void (*onchannel_callback)(void *context), |
c35470b2 S |
1040 | void *context); |
1041 | ||
1042 | extern void vmbus_close(struct vmbus_channel *channel); | |
1043 | ||
1044 | extern int vmbus_sendpacket(struct vmbus_channel *channel, | |
011a7c3c | 1045 | void *buffer, |
c35470b2 S |
1046 | u32 bufferLen, |
1047 | u64 requestid, | |
1048 | enum vmbus_packet_type type, | |
1049 | u32 flags); | |
1050 | ||
1051 | extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, | |
1052 | struct hv_page_buffer pagebuffers[], | |
1053 | u32 pagecount, | |
1054 | void *buffer, | |
1055 | u32 bufferlen, | |
1056 | u64 requestid); | |
1057 | ||
d61031ee S |
1058 | extern int vmbus_sendpacket_mpb_desc(struct vmbus_channel *channel, |
1059 | struct vmbus_packet_mpb_array *mpb, | |
1060 | u32 desc_size, | |
1061 | void *buffer, | |
1062 | u32 bufferlen, | |
1063 | u64 requestid); | |
1064 | ||
c35470b2 S |
1065 | extern int vmbus_establish_gpadl(struct vmbus_channel *channel, |
1066 | void *kbuffer, | |
1067 | u32 size, | |
1068 | u32 *gpadl_handle); | |
1069 | ||
1070 | extern int vmbus_teardown_gpadl(struct vmbus_channel *channel, | |
1071 | u32 gpadl_handle); | |
1072 | ||
d3b26dd7 DC |
1073 | void vmbus_reset_channel_cb(struct vmbus_channel *channel); |
1074 | ||
c35470b2 S |
1075 | extern int vmbus_recvpacket(struct vmbus_channel *channel, |
1076 | void *buffer, | |
1077 | u32 bufferlen, | |
1078 | u32 *buffer_actual_len, | |
1079 | u64 *requestid); | |
1080 | ||
1081 | extern int vmbus_recvpacket_raw(struct vmbus_channel *channel, | |
1082 | void *buffer, | |
1083 | u32 bufferlen, | |
1084 | u32 *buffer_actual_len, | |
1085 | u64 *requestid); | |
1086 | ||
c35470b2 | 1087 | |
c35470b2 S |
1088 | extern void vmbus_ontimer(unsigned long data); |
1089 | ||
35ea09c3 S |
1090 | /* Base driver object */ |
1091 | struct hv_driver { | |
1092 | const char *name; | |
1093 | ||
8981da32 DC |
1094 | /* |
1095 | * A hvsock offer, which has a VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER | |
1096 | * channel flag, actually doesn't mean a synthetic device because the | |
1097 | * offer's if_type/if_instance can change for every new hvsock | |
1098 | * connection. | |
1099 | * | |
1100 | * However, to facilitate the notification of new-offer/rescind-offer | |
1101 | * from vmbus driver to hvsock driver, we can handle hvsock offer as | |
1102 | * a special vmbus device, and hence we need the below flag to | |
1103 | * indicate if the driver is the hvsock driver or not: we need to | |
1104 | * specially treat the hvosck offer & driver in vmbus_match(). | |
1105 | */ | |
1106 | bool hvsock; | |
1107 | ||
35ea09c3 | 1108 | /* the device type supported by this driver */ |
358d2ee2 | 1109 | uuid_le dev_type; |
2e2c1d17 | 1110 | const struct hv_vmbus_device_id *id_table; |
35ea09c3 S |
1111 | |
1112 | struct device_driver driver; | |
1113 | ||
fc76936d SH |
1114 | /* dynamic device GUID's */ |
1115 | struct { | |
1116 | spinlock_t lock; | |
1117 | struct list_head list; | |
1118 | } dynids; | |
1119 | ||
84946899 | 1120 | int (*probe)(struct hv_device *, const struct hv_vmbus_device_id *); |
35ea09c3 S |
1121 | int (*remove)(struct hv_device *); |
1122 | void (*shutdown)(struct hv_device *); | |
1123 | ||
1124 | }; | |
1125 | ||
1126 | /* Base device object */ | |
1127 | struct hv_device { | |
1128 | /* the device type id of this device */ | |
358d2ee2 | 1129 | uuid_le dev_type; |
35ea09c3 S |
1130 | |
1131 | /* the device instance id of this device */ | |
358d2ee2 | 1132 | uuid_le dev_instance; |
7047f17d S |
1133 | u16 vendor_id; |
1134 | u16 device_id; | |
35ea09c3 S |
1135 | |
1136 | struct device device; | |
d765edbb | 1137 | char *driver_override; /* Driver name to force a match */ |
35ea09c3 S |
1138 | |
1139 | struct vmbus_channel *channel; | |
c2e5df61 | 1140 | struct kset *channels_kset; |
35ea09c3 S |
1141 | }; |
1142 | ||
27b5b3ca S |
1143 | |
1144 | static inline struct hv_device *device_to_hv_device(struct device *d) | |
1145 | { | |
1146 | return container_of(d, struct hv_device, device); | |
1147 | } | |
1148 | ||
1149 | static inline struct hv_driver *drv_to_hv_drv(struct device_driver *d) | |
1150 | { | |
1151 | return container_of(d, struct hv_driver, driver); | |
1152 | } | |
1153 | ||
ab101e86 S |
1154 | static inline void hv_set_drvdata(struct hv_device *dev, void *data) |
1155 | { | |
1156 | dev_set_drvdata(&dev->device, data); | |
1157 | } | |
1158 | ||
1159 | static inline void *hv_get_drvdata(struct hv_device *dev) | |
1160 | { | |
1161 | return dev_get_drvdata(&dev->device); | |
1162 | } | |
27b5b3ca | 1163 | |
4827ee1d SH |
1164 | struct hv_ring_buffer_debug_info { |
1165 | u32 current_interrupt_mask; | |
1166 | u32 current_read_index; | |
1167 | u32 current_write_index; | |
1168 | u32 bytes_avail_toread; | |
1169 | u32 bytes_avail_towrite; | |
1170 | }; | |
1171 | ||
1172 | void hv_ringbuffer_get_debuginfo(const struct hv_ring_buffer_info *ring_info, | |
1173 | struct hv_ring_buffer_debug_info *debug_info); | |
1174 | ||
27b5b3ca | 1175 | /* Vmbus interface */ |
768fa219 GKH |
1176 | #define vmbus_driver_register(driver) \ |
1177 | __vmbus_driver_register(driver, THIS_MODULE, KBUILD_MODNAME) | |
1178 | int __must_check __vmbus_driver_register(struct hv_driver *hv_driver, | |
1179 | struct module *owner, | |
1180 | const char *mod_name); | |
1181 | void vmbus_driver_unregister(struct hv_driver *hv_driver); | |
27b5b3ca | 1182 | |
85d9aa70 DC |
1183 | void vmbus_hvsock_device_unregister(struct vmbus_channel *channel); |
1184 | ||
35464483 JO |
1185 | int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj, |
1186 | resource_size_t min, resource_size_t max, | |
1187 | resource_size_t size, resource_size_t align, | |
1188 | bool fb_overlap_ok); | |
97fb77dc | 1189 | void vmbus_free_mmio(resource_size_t start, resource_size_t size); |
619848bd | 1190 | |
7fb96565 S |
1191 | /* |
1192 | * GUID definitions of various offer types - services offered to the guest. | |
1193 | */ | |
1194 | ||
1195 | /* | |
1196 | * Network GUID | |
1197 | * {f8615163-df3e-46c5-913f-f2d2f965ed0e} | |
1198 | */ | |
1199 | #define HV_NIC_GUID \ | |
af3ff643 S |
1200 | .guid = UUID_LE(0xf8615163, 0xdf3e, 0x46c5, 0x91, 0x3f, \ |
1201 | 0xf2, 0xd2, 0xf9, 0x65, 0xed, 0x0e) | |
7fb96565 S |
1202 | |
1203 | /* | |
1204 | * IDE GUID | |
1205 | * {32412632-86cb-44a2-9b5c-50d1417354f5} | |
1206 | */ | |
1207 | #define HV_IDE_GUID \ | |
af3ff643 S |
1208 | .guid = UUID_LE(0x32412632, 0x86cb, 0x44a2, 0x9b, 0x5c, \ |
1209 | 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5) | |
7fb96565 S |
1210 | |
1211 | /* | |
1212 | * SCSI GUID | |
1213 | * {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} | |
1214 | */ | |
1215 | #define HV_SCSI_GUID \ | |
af3ff643 S |
1216 | .guid = UUID_LE(0xba6163d9, 0x04a1, 0x4d29, 0xb6, 0x05, \ |
1217 | 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f) | |
7fb96565 S |
1218 | |
1219 | /* | |
1220 | * Shutdown GUID | |
1221 | * {0e0b6031-5213-4934-818b-38d90ced39db} | |
1222 | */ | |
1223 | #define HV_SHUTDOWN_GUID \ | |
af3ff643 S |
1224 | .guid = UUID_LE(0x0e0b6031, 0x5213, 0x4934, 0x81, 0x8b, \ |
1225 | 0x38, 0xd9, 0x0c, 0xed, 0x39, 0xdb) | |
7fb96565 S |
1226 | |
1227 | /* | |
1228 | * Time Synch GUID | |
1229 | * {9527E630-D0AE-497b-ADCE-E80AB0175CAF} | |
1230 | */ | |
1231 | #define HV_TS_GUID \ | |
af3ff643 S |
1232 | .guid = UUID_LE(0x9527e630, 0xd0ae, 0x497b, 0xad, 0xce, \ |
1233 | 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf) | |
7fb96565 S |
1234 | |
1235 | /* | |
1236 | * Heartbeat GUID | |
1237 | * {57164f39-9115-4e78-ab55-382f3bd5422d} | |
1238 | */ | |
1239 | #define HV_HEART_BEAT_GUID \ | |
af3ff643 S |
1240 | .guid = UUID_LE(0x57164f39, 0x9115, 0x4e78, 0xab, 0x55, \ |
1241 | 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d) | |
7fb96565 S |
1242 | |
1243 | /* | |
1244 | * KVP GUID | |
1245 | * {a9a0f4e7-5a45-4d96-b827-8a841e8c03e6} | |
1246 | */ | |
1247 | #define HV_KVP_GUID \ | |
af3ff643 S |
1248 | .guid = UUID_LE(0xa9a0f4e7, 0x5a45, 0x4d96, 0xb8, 0x27, \ |
1249 | 0x8a, 0x84, 0x1e, 0x8c, 0x03, 0xe6) | |
7fb96565 S |
1250 | |
1251 | /* | |
1252 | * Dynamic memory GUID | |
1253 | * {525074dc-8985-46e2-8057-a307dc18a502} | |
1254 | */ | |
1255 | #define HV_DM_GUID \ | |
af3ff643 S |
1256 | .guid = UUID_LE(0x525074dc, 0x8985, 0x46e2, 0x80, 0x57, \ |
1257 | 0xa3, 0x07, 0xdc, 0x18, 0xa5, 0x02) | |
7fb96565 S |
1258 | |
1259 | /* | |
1260 | * Mouse GUID | |
1261 | * {cfa8b69e-5b4a-4cc0-b98b-8ba1a1f3f95a} | |
1262 | */ | |
1263 | #define HV_MOUSE_GUID \ | |
af3ff643 S |
1264 | .guid = UUID_LE(0xcfa8b69e, 0x5b4a, 0x4cc0, 0xb9, 0x8b, \ |
1265 | 0x8b, 0xa1, 0xa1, 0xf3, 0xf9, 0x5a) | |
7fb96565 | 1266 | |
2048157a DC |
1267 | /* |
1268 | * Keyboard GUID | |
1269 | * {f912ad6d-2b17-48ea-bd65-f927a61c7684} | |
1270 | */ | |
1271 | #define HV_KBD_GUID \ | |
1272 | .guid = UUID_LE(0xf912ad6d, 0x2b17, 0x48ea, 0xbd, 0x65, \ | |
1273 | 0xf9, 0x27, 0xa6, 0x1c, 0x76, 0x84) | |
1274 | ||
96dd86fa S |
1275 | /* |
1276 | * VSS (Backup/Restore) GUID | |
1277 | */ | |
1278 | #define HV_VSS_GUID \ | |
af3ff643 S |
1279 | .guid = UUID_LE(0x35fa2e29, 0xea23, 0x4236, 0x96, 0xae, \ |
1280 | 0x3a, 0x6e, 0xba, 0xcb, 0xa4, 0x40) | |
68a2d20b HZ |
1281 | /* |
1282 | * Synthetic Video GUID | |
1283 | * {DA0A7802-E377-4aac-8E77-0558EB1073F8} | |
1284 | */ | |
1285 | #define HV_SYNTHVID_GUID \ | |
af3ff643 S |
1286 | .guid = UUID_LE(0xda0a7802, 0xe377, 0x4aac, 0x8e, 0x77, \ |
1287 | 0x05, 0x58, 0xeb, 0x10, 0x73, 0xf8) | |
68a2d20b | 1288 | |
98b80d89 S |
1289 | /* |
1290 | * Synthetic FC GUID | |
1291 | * {2f9bcc4a-0069-4af3-b76b-6fd0be528cda} | |
1292 | */ | |
1293 | #define HV_SYNTHFC_GUID \ | |
af3ff643 S |
1294 | .guid = UUID_LE(0x2f9bcc4a, 0x0069, 0x4af3, 0xb7, 0x6b, \ |
1295 | 0x6f, 0xd0, 0xbe, 0x52, 0x8c, 0xda) | |
98b80d89 | 1296 | |
01325476 S |
1297 | /* |
1298 | * Guest File Copy Service | |
1299 | * {34D14BE3-DEE4-41c8-9AE7-6B174977C192} | |
1300 | */ | |
1301 | ||
1302 | #define HV_FCOPY_GUID \ | |
af3ff643 S |
1303 | .guid = UUID_LE(0x34d14be3, 0xdee4, 0x41c8, 0x9a, 0xe7, \ |
1304 | 0x6b, 0x17, 0x49, 0x77, 0xc1, 0x92) | |
01325476 | 1305 | |
04653a00 S |
1306 | /* |
1307 | * NetworkDirect. This is the guest RDMA service. | |
1308 | * {8c2eaf3d-32a7-4b09-ab99-bd1f1c86b501} | |
1309 | */ | |
1310 | #define HV_ND_GUID \ | |
af3ff643 S |
1311 | .guid = UUID_LE(0x8c2eaf3d, 0x32a7, 0x4b09, 0xab, 0x99, \ |
1312 | 0xbd, 0x1f, 0x1c, 0x86, 0xb5, 0x01) | |
04653a00 | 1313 | |
3053c762 JO |
1314 | /* |
1315 | * PCI Express Pass Through | |
1316 | * {44C4F61D-4444-4400-9D52-802E27EDE19F} | |
1317 | */ | |
1318 | ||
1319 | #define HV_PCIE_GUID \ | |
af3ff643 S |
1320 | .guid = UUID_LE(0x44c4f61d, 0x4444, 0x4400, 0x9d, 0x52, \ |
1321 | 0x80, 0x2e, 0x27, 0xed, 0xe1, 0x9f) | |
3053c762 | 1322 | |
0f98829a DC |
1323 | /* |
1324 | * Linux doesn't support the 3 devices: the first two are for | |
1325 | * Automatic Virtual Machine Activation, and the third is for | |
1326 | * Remote Desktop Virtualization. | |
1327 | * {f8e65716-3cb3-4a06-9a60-1889c5cccab5} | |
1328 | * {3375baf4-9e15-4b30-b765-67acb10d607b} | |
1329 | * {276aacf4-ac15-426c-98dd-7521ad3f01fe} | |
1330 | */ | |
1331 | ||
1332 | #define HV_AVMA1_GUID \ | |
1333 | .guid = UUID_LE(0xf8e65716, 0x3cb3, 0x4a06, 0x9a, 0x60, \ | |
1334 | 0x18, 0x89, 0xc5, 0xcc, 0xca, 0xb5) | |
1335 | ||
1336 | #define HV_AVMA2_GUID \ | |
1337 | .guid = UUID_LE(0x3375baf4, 0x9e15, 0x4b30, 0xb7, 0x65, \ | |
1338 | 0x67, 0xac, 0xb1, 0x0d, 0x60, 0x7b) | |
1339 | ||
1340 | #define HV_RDV_GUID \ | |
1341 | .guid = UUID_LE(0x276aacf4, 0xac15, 0x426c, 0x98, 0xdd, \ | |
1342 | 0x75, 0x21, 0xad, 0x3f, 0x01, 0xfe) | |
1343 | ||
b189702d S |
1344 | /* |
1345 | * Common header for Hyper-V ICs | |
1346 | */ | |
1347 | ||
1348 | #define ICMSGTYPE_NEGOTIATE 0 | |
1349 | #define ICMSGTYPE_HEARTBEAT 1 | |
1350 | #define ICMSGTYPE_KVPEXCHANGE 2 | |
1351 | #define ICMSGTYPE_SHUTDOWN 3 | |
1352 | #define ICMSGTYPE_TIMESYNC 4 | |
1353 | #define ICMSGTYPE_VSS 5 | |
1354 | ||
1355 | #define ICMSGHDRFLAG_TRANSACTION 1 | |
1356 | #define ICMSGHDRFLAG_REQUEST 2 | |
1357 | #define ICMSGHDRFLAG_RESPONSE 4 | |
1358 | ||
b189702d | 1359 | |
a29b643c S |
1360 | /* |
1361 | * While we want to handle util services as regular devices, | |
1362 | * there is only one instance of each of these services; so | |
1363 | * we statically allocate the service specific state. | |
1364 | */ | |
1365 | ||
1366 | struct hv_util_service { | |
1367 | u8 *recv_buffer; | |
b9830d12 | 1368 | void *channel; |
a29b643c S |
1369 | void (*util_cb)(void *); |
1370 | int (*util_init)(struct hv_util_service *); | |
1371 | void (*util_deinit)(void); | |
1372 | }; | |
1373 | ||
b189702d S |
1374 | struct vmbuspipe_hdr { |
1375 | u32 flags; | |
1376 | u32 msgsize; | |
1377 | } __packed; | |
1378 | ||
1379 | struct ic_version { | |
1380 | u16 major; | |
1381 | u16 minor; | |
1382 | } __packed; | |
1383 | ||
1384 | struct icmsg_hdr { | |
1385 | struct ic_version icverframe; | |
1386 | u16 icmsgtype; | |
1387 | struct ic_version icvermsg; | |
1388 | u16 icmsgsize; | |
1389 | u32 status; | |
1390 | u8 ictransaction_id; | |
1391 | u8 icflags; | |
1392 | u8 reserved[2]; | |
1393 | } __packed; | |
1394 | ||
1395 | struct icmsg_negotiate { | |
1396 | u16 icframe_vercnt; | |
1397 | u16 icmsg_vercnt; | |
1398 | u32 reserved; | |
1399 | struct ic_version icversion_data[1]; /* any size array */ | |
1400 | } __packed; | |
1401 | ||
1402 | struct shutdown_msg_data { | |
1403 | u32 reason_code; | |
1404 | u32 timeout_seconds; | |
1405 | u32 flags; | |
1406 | u8 display_message[2048]; | |
1407 | } __packed; | |
1408 | ||
1409 | struct heartbeat_msg_data { | |
1410 | u64 seq_num; | |
1411 | u32 reserved[8]; | |
1412 | } __packed; | |
1413 | ||
1414 | /* Time Sync IC defs */ | |
1415 | #define ICTIMESYNCFLAG_PROBE 0 | |
1416 | #define ICTIMESYNCFLAG_SYNC 1 | |
1417 | #define ICTIMESYNCFLAG_SAMPLE 2 | |
1418 | ||
1419 | #ifdef __x86_64__ | |
1420 | #define WLTIMEDELTA 116444736000000000L /* in 100ns unit */ | |
1421 | #else | |
1422 | #define WLTIMEDELTA 116444736000000000LL | |
1423 | #endif | |
1424 | ||
1425 | struct ictimesync_data { | |
1426 | u64 parenttime; | |
1427 | u64 childtime; | |
1428 | u64 roundtriptime; | |
1429 | u8 flags; | |
1430 | } __packed; | |
1431 | ||
8e1d2607 AN |
1432 | struct ictimesync_ref_data { |
1433 | u64 parenttime; | |
1434 | u64 vmreferencetime; | |
1435 | u8 flags; | |
1436 | char leapflags; | |
1437 | char stratum; | |
1438 | u8 reserved[3]; | |
1439 | } __packed; | |
1440 | ||
b189702d S |
1441 | struct hyperv_service_callback { |
1442 | u8 msg_type; | |
1443 | char *log_msg; | |
358d2ee2 | 1444 | uuid_le data; |
b189702d | 1445 | struct vmbus_channel *channel; |
2a9d7de2 | 1446 | void (*callback)(void *context); |
b189702d S |
1447 | }; |
1448 | ||
c836d0ab | 1449 | #define MAX_SRV_VER 0x7ffffff |
a1656454 AN |
1450 | extern bool vmbus_prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, u8 *buf, |
1451 | const int *fw_version, int fw_vercnt, | |
1452 | const int *srv_version, int srv_vercnt, | |
1453 | int *nego_fw_version, int *nego_srv_version); | |
b189702d | 1454 | |
800b9329 | 1455 | void hv_process_channel_removal(struct vmbus_channel *channel); |
96dd86fa | 1456 | |
1f6ee4e7 | 1457 | void vmbus_setevent(struct vmbus_channel *channel); |
37f7278b S |
1458 | /* |
1459 | * Negotiated version with the Host. | |
1460 | */ | |
1461 | ||
1462 | extern __u32 vmbus_proto_version; | |
1463 | ||
5c23a1a5 DC |
1464 | int vmbus_send_tl_connect_request(const uuid_le *shv_guest_servie_id, |
1465 | const uuid_le *shv_host_servie_id); | |
5cc47247 | 1466 | void vmbus_set_event(struct vmbus_channel *channel); |
687f32e6 S |
1467 | |
1468 | /* Get the start of the ring buffer. */ | |
1469 | static inline void * | |
e4165a0f | 1470 | hv_get_ring_buffer(const struct hv_ring_buffer_info *ring_info) |
687f32e6 | 1471 | { |
e4165a0f | 1472 | return ring_info->ring_buffer->buffer; |
687f32e6 S |
1473 | } |
1474 | ||
6e47dd3e SH |
1475 | /* |
1476 | * Mask off host interrupt callback notifications | |
1477 | */ | |
1478 | static inline void hv_begin_read(struct hv_ring_buffer_info *rbi) | |
1479 | { | |
1480 | rbi->ring_buffer->interrupt_mask = 1; | |
1481 | ||
1482 | /* make sure mask update is not reordered */ | |
1483 | virt_mb(); | |
1484 | } | |
1485 | ||
1486 | /* | |
1487 | * Re-enable host callback and return number of outstanding bytes | |
1488 | */ | |
1489 | static inline u32 hv_end_read(struct hv_ring_buffer_info *rbi) | |
1490 | { | |
1491 | ||
1492 | rbi->ring_buffer->interrupt_mask = 0; | |
1493 | ||
1494 | /* make sure mask update is not reordered */ | |
1495 | virt_mb(); | |
1496 | ||
1497 | /* | |
1498 | * Now check to see if the ring buffer is still empty. | |
1499 | * If it is not, we raced and we need to process new | |
1500 | * incoming messages. | |
1501 | */ | |
1502 | return hv_get_bytes_to_read(rbi); | |
1503 | } | |
1504 | ||
ab028db4 S |
1505 | /* |
1506 | * An API to support in-place processing of incoming VMBUS packets. | |
1507 | */ | |
ab028db4 | 1508 | |
f3dd3f47 | 1509 | /* Get data payload associated with descriptor */ |
1510 | static inline void *hv_pkt_data(const struct vmpacket_descriptor *desc) | |
ab028db4 | 1511 | { |
f3dd3f47 | 1512 | return (void *)((unsigned long)desc + (desc->offset8 << 3)); |
ab028db4 S |
1513 | } |
1514 | ||
f3dd3f47 | 1515 | /* Get data size associated with descriptor */ |
1516 | static inline u32 hv_pkt_datalen(const struct vmpacket_descriptor *desc) | |
ab028db4 | 1517 | { |
f3dd3f47 | 1518 | return (desc->len8 << 3) - (desc->offset8 << 3); |
ab028db4 S |
1519 | } |
1520 | ||
f3dd3f47 | 1521 | |
1522 | struct vmpacket_descriptor * | |
1523 | hv_pkt_iter_first(struct vmbus_channel *channel); | |
1524 | ||
1525 | struct vmpacket_descriptor * | |
1526 | __hv_pkt_iter_next(struct vmbus_channel *channel, | |
1527 | const struct vmpacket_descriptor *pkt); | |
1528 | ||
1529 | void hv_pkt_iter_close(struct vmbus_channel *channel); | |
1530 | ||
ab028db4 | 1531 | /* |
f3dd3f47 | 1532 | * Get next packet descriptor from iterator |
1533 | * If at end of list, return NULL and update host. | |
ab028db4 | 1534 | */ |
f3dd3f47 | 1535 | static inline struct vmpacket_descriptor * |
1536 | hv_pkt_iter_next(struct vmbus_channel *channel, | |
1537 | const struct vmpacket_descriptor *pkt) | |
ab028db4 | 1538 | { |
f3dd3f47 | 1539 | struct vmpacket_descriptor *nxt; |
1540 | ||
1541 | nxt = __hv_pkt_iter_next(channel, pkt); | |
1542 | if (!nxt) | |
1543 | hv_pkt_iter_close(channel); | |
ab028db4 | 1544 | |
f3dd3f47 | 1545 | return nxt; |
ab028db4 S |
1546 | } |
1547 | ||
f3dd3f47 | 1548 | #define foreach_vmbus_pkt(pkt, channel) \ |
1549 | for (pkt = hv_pkt_iter_first(channel); pkt; \ | |
1550 | pkt = hv_pkt_iter_next(channel, pkt)) | |
ab028db4 | 1551 | |
3f335ea2 | 1552 | #endif /* _HYPERV_H */ |