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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 | */ | |
db5871e8 | 120 | u8 buffer[]; |
7effffb7 S |
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) |
2d4f49b3 | 185 | * 4 . 1 (Windows 10 RS3) |
ae20b254 | 186 | * 5 . 0 (Newer Windows 10) |
2d4f49b3 AP |
187 | * 5 . 1 (Windows 10 RS4) |
188 | * 5 . 2 (Windows Server 2019, RS5) | |
eafa7072 S |
189 | */ |
190 | ||
191 | #define VERSION_WS2008 ((0 << 16) | (13)) | |
192 | #define VERSION_WIN7 ((1 << 16) | (1)) | |
193 | #define VERSION_WIN8 ((2 << 16) | (4)) | |
03367ef5 | 194 | #define VERSION_WIN8_1 ((3 << 16) | (0)) |
2d4f49b3 AP |
195 | #define VERSION_WIN10 ((4 << 16) | (0)) |
196 | #define VERSION_WIN10_V4_1 ((4 << 16) | (1)) | |
ae20b254 | 197 | #define VERSION_WIN10_V5 ((5 << 16) | (0)) |
2d4f49b3 AP |
198 | #define VERSION_WIN10_V5_1 ((5 << 16) | (1)) |
199 | #define VERSION_WIN10_V5_2 ((5 << 16) | (2)) | |
eafa7072 | 200 | |
517d8dc6 S |
201 | /* Make maximum size of pipe payload of 16K */ |
202 | #define MAX_PIPE_DATA_PAYLOAD (sizeof(u8) * 16384) | |
203 | ||
204 | /* Define PipeMode values. */ | |
205 | #define VMBUS_PIPE_TYPE_BYTE 0x00000000 | |
206 | #define VMBUS_PIPE_TYPE_MESSAGE 0x00000004 | |
207 | ||
208 | /* The size of the user defined data buffer for non-pipe offers. */ | |
209 | #define MAX_USER_DEFINED_BYTES 120 | |
210 | ||
211 | /* The size of the user defined data buffer for pipe offers. */ | |
212 | #define MAX_PIPE_USER_DEFINED_BYTES 116 | |
213 | ||
214 | /* | |
215 | * At the center of the Channel Management library is the Channel Offer. This | |
216 | * struct contains the fundamental information about an offer. | |
217 | */ | |
218 | struct vmbus_channel_offer { | |
593db803 AS |
219 | guid_t if_type; |
220 | guid_t if_instance; | |
29423b7e S |
221 | |
222 | /* | |
223 | * These two fields are not currently used. | |
224 | */ | |
225 | u64 reserved1; | |
226 | u64 reserved2; | |
227 | ||
517d8dc6 S |
228 | u16 chn_flags; |
229 | u16 mmio_megabytes; /* in bytes * 1024 * 1024 */ | |
230 | ||
231 | union { | |
232 | /* Non-pipes: The user has MAX_USER_DEFINED_BYTES bytes. */ | |
233 | struct { | |
234 | unsigned char user_def[MAX_USER_DEFINED_BYTES]; | |
235 | } std; | |
236 | ||
237 | /* | |
238 | * Pipes: | |
239 | * The following sructure is an integrated pipe protocol, which | |
240 | * is implemented on top of standard user-defined data. Pipe | |
241 | * clients have MAX_PIPE_USER_DEFINED_BYTES left for their own | |
242 | * use. | |
243 | */ | |
244 | struct { | |
245 | u32 pipe_mode; | |
246 | unsigned char user_def[MAX_PIPE_USER_DEFINED_BYTES]; | |
247 | } pipe; | |
248 | } u; | |
29423b7e | 249 | /* |
ed56ef67 DC |
250 | * The sub_channel_index is defined in Win8: a value of zero means a |
251 | * primary channel and a value of non-zero means a sub-channel. | |
252 | * | |
253 | * Before Win8, the field is reserved, meaning it's always zero. | |
29423b7e S |
254 | */ |
255 | u16 sub_channel_index; | |
256 | u16 reserved3; | |
517d8dc6 S |
257 | } __packed; |
258 | ||
259 | /* Server Flags */ | |
260 | #define VMBUS_CHANNEL_ENUMERATE_DEVICE_INTERFACE 1 | |
261 | #define VMBUS_CHANNEL_SERVER_SUPPORTS_TRANSFER_PAGES 2 | |
262 | #define VMBUS_CHANNEL_SERVER_SUPPORTS_GPADLS 4 | |
263 | #define VMBUS_CHANNEL_NAMED_PIPE_MODE 0x10 | |
264 | #define VMBUS_CHANNEL_LOOPBACK_OFFER 0x100 | |
265 | #define VMBUS_CHANNEL_PARENT_OFFER 0x200 | |
266 | #define VMBUS_CHANNEL_REQUEST_MONITORED_NOTIFICATION 0x400 | |
e8d6ca02 | 267 | #define VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER 0x2000 |
517d8dc6 | 268 | |
50ed40e0 S |
269 | struct vmpacket_descriptor { |
270 | u16 type; | |
271 | u16 offset8; | |
272 | u16 len8; | |
273 | u16 flags; | |
274 | u64 trans_id; | |
275 | } __packed; | |
276 | ||
277 | struct vmpacket_header { | |
278 | u32 prev_pkt_start_offset; | |
279 | struct vmpacket_descriptor descriptor; | |
280 | } __packed; | |
281 | ||
282 | struct vmtransfer_page_range { | |
283 | u32 byte_count; | |
284 | u32 byte_offset; | |
285 | } __packed; | |
286 | ||
287 | struct vmtransfer_page_packet_header { | |
288 | struct vmpacket_descriptor d; | |
289 | u16 xfer_pageset_id; | |
1508d811 | 290 | u8 sender_owns_set; |
50ed40e0 S |
291 | u8 reserved; |
292 | u32 range_cnt; | |
293 | struct vmtransfer_page_range ranges[1]; | |
294 | } __packed; | |
295 | ||
296 | struct vmgpadl_packet_header { | |
297 | struct vmpacket_descriptor d; | |
298 | u32 gpadl; | |
299 | u32 reserved; | |
300 | } __packed; | |
301 | ||
302 | struct vmadd_remove_transfer_page_set { | |
303 | struct vmpacket_descriptor d; | |
304 | u32 gpadl; | |
305 | u16 xfer_pageset_id; | |
306 | u16 reserved; | |
307 | } __packed; | |
308 | ||
309 | /* | |
310 | * This structure defines a range in guest physical space that can be made to | |
311 | * look virtually contiguous. | |
312 | */ | |
313 | struct gpa_range { | |
314 | u32 byte_count; | |
315 | u32 byte_offset; | |
db5871e8 | 316 | u64 pfn_array[]; |
50ed40e0 S |
317 | }; |
318 | ||
319 | /* | |
320 | * This is the format for an Establish Gpadl packet, which contains a handle by | |
321 | * which this GPADL will be known and a set of GPA ranges associated with it. | |
322 | * This can be converted to a MDL by the guest OS. If there are multiple GPA | |
323 | * ranges, then the resulting MDL will be "chained," representing multiple VA | |
324 | * ranges. | |
325 | */ | |
326 | struct vmestablish_gpadl { | |
327 | struct vmpacket_descriptor d; | |
328 | u32 gpadl; | |
329 | u32 range_cnt; | |
330 | struct gpa_range range[1]; | |
331 | } __packed; | |
332 | ||
333 | /* | |
334 | * This is the format for a Teardown Gpadl packet, which indicates that the | |
335 | * GPADL handle in the Establish Gpadl packet will never be referenced again. | |
336 | */ | |
337 | struct vmteardown_gpadl { | |
338 | struct vmpacket_descriptor d; | |
339 | u32 gpadl; | |
340 | u32 reserved; /* for alignment to a 8-byte boundary */ | |
341 | } __packed; | |
342 | ||
343 | /* | |
344 | * This is the format for a GPA-Direct packet, which contains a set of GPA | |
345 | * ranges, in addition to commands and/or data. | |
346 | */ | |
347 | struct vmdata_gpa_direct { | |
348 | struct vmpacket_descriptor d; | |
349 | u32 reserved; | |
350 | u32 range_cnt; | |
351 | struct gpa_range range[1]; | |
352 | } __packed; | |
353 | ||
354 | /* This is the format for a Additional Data Packet. */ | |
355 | struct vmadditional_data { | |
356 | struct vmpacket_descriptor d; | |
357 | u64 total_bytes; | |
358 | u32 offset; | |
359 | u32 byte_cnt; | |
360 | unsigned char data[1]; | |
361 | } __packed; | |
362 | ||
363 | union vmpacket_largest_possible_header { | |
364 | struct vmpacket_descriptor simple_hdr; | |
365 | struct vmtransfer_page_packet_header xfer_page_hdr; | |
366 | struct vmgpadl_packet_header gpadl_hdr; | |
367 | struct vmadd_remove_transfer_page_set add_rm_xfer_page_hdr; | |
368 | struct vmestablish_gpadl establish_gpadl_hdr; | |
369 | struct vmteardown_gpadl teardown_gpadl_hdr; | |
370 | struct vmdata_gpa_direct data_gpa_direct_hdr; | |
371 | }; | |
372 | ||
373 | #define VMPACKET_DATA_START_ADDRESS(__packet) \ | |
374 | (void *)(((unsigned char *)__packet) + \ | |
375 | ((struct vmpacket_descriptor)__packet)->offset8 * 8) | |
376 | ||
377 | #define VMPACKET_DATA_LENGTH(__packet) \ | |
378 | ((((struct vmpacket_descriptor)__packet)->len8 - \ | |
379 | ((struct vmpacket_descriptor)__packet)->offset8) * 8) | |
380 | ||
381 | #define VMPACKET_TRANSFER_MODE(__packet) \ | |
382 | (((struct IMPACT)__packet)->type) | |
383 | ||
384 | enum vmbus_packet_type { | |
385 | VM_PKT_INVALID = 0x0, | |
386 | VM_PKT_SYNCH = 0x1, | |
387 | VM_PKT_ADD_XFER_PAGESET = 0x2, | |
388 | VM_PKT_RM_XFER_PAGESET = 0x3, | |
389 | VM_PKT_ESTABLISH_GPADL = 0x4, | |
390 | VM_PKT_TEARDOWN_GPADL = 0x5, | |
391 | VM_PKT_DATA_INBAND = 0x6, | |
392 | VM_PKT_DATA_USING_XFER_PAGES = 0x7, | |
393 | VM_PKT_DATA_USING_GPADL = 0x8, | |
394 | VM_PKT_DATA_USING_GPA_DIRECT = 0x9, | |
395 | VM_PKT_CANCEL_REQUEST = 0xa, | |
396 | VM_PKT_COMP = 0xb, | |
397 | VM_PKT_DATA_USING_ADDITIONAL_PKT = 0xc, | |
398 | VM_PKT_ADDITIONAL_DATA = 0xd | |
399 | }; | |
400 | ||
401 | #define VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED 1 | |
517d8dc6 | 402 | |
b56dda06 | 403 | |
b56dda06 S |
404 | /* Version 1 messages */ |
405 | enum vmbus_channel_message_type { | |
406 | CHANNELMSG_INVALID = 0, | |
407 | CHANNELMSG_OFFERCHANNEL = 1, | |
408 | CHANNELMSG_RESCIND_CHANNELOFFER = 2, | |
409 | CHANNELMSG_REQUESTOFFERS = 3, | |
410 | CHANNELMSG_ALLOFFERS_DELIVERED = 4, | |
411 | CHANNELMSG_OPENCHANNEL = 5, | |
412 | CHANNELMSG_OPENCHANNEL_RESULT = 6, | |
413 | CHANNELMSG_CLOSECHANNEL = 7, | |
414 | CHANNELMSG_GPADL_HEADER = 8, | |
415 | CHANNELMSG_GPADL_BODY = 9, | |
416 | CHANNELMSG_GPADL_CREATED = 10, | |
417 | CHANNELMSG_GPADL_TEARDOWN = 11, | |
418 | CHANNELMSG_GPADL_TORNDOWN = 12, | |
419 | CHANNELMSG_RELID_RELEASED = 13, | |
420 | CHANNELMSG_INITIATE_CONTACT = 14, | |
421 | CHANNELMSG_VERSION_RESPONSE = 15, | |
422 | CHANNELMSG_UNLOAD = 16, | |
2db84eff | 423 | CHANNELMSG_UNLOAD_RESPONSE = 17, |
5c23a1a5 DC |
424 | CHANNELMSG_18 = 18, |
425 | CHANNELMSG_19 = 19, | |
426 | CHANNELMSG_20 = 20, | |
427 | CHANNELMSG_TL_CONNECT_REQUEST = 21, | |
75278105 | 428 | CHANNELMSG_MODIFYCHANNEL = 22, |
ddc9d357 | 429 | CHANNELMSG_TL_CONNECT_RESULT = 23, |
b56dda06 S |
430 | CHANNELMSG_COUNT |
431 | }; | |
432 | ||
d8bd2d44 DC |
433 | /* Hyper-V supports about 2048 channels, and the RELIDs start with 1. */ |
434 | #define INVALID_RELID U32_MAX | |
435 | ||
b56dda06 S |
436 | struct vmbus_channel_message_header { |
437 | enum vmbus_channel_message_type msgtype; | |
438 | u32 padding; | |
439 | } __packed; | |
440 | ||
441 | /* Query VMBus Version parameters */ | |
442 | struct vmbus_channel_query_vmbus_version { | |
443 | struct vmbus_channel_message_header header; | |
444 | u32 version; | |
445 | } __packed; | |
446 | ||
447 | /* VMBus Version Supported parameters */ | |
448 | struct vmbus_channel_version_supported { | |
449 | struct vmbus_channel_message_header header; | |
1508d811 | 450 | u8 version_supported; |
b56dda06 S |
451 | } __packed; |
452 | ||
453 | /* Offer Channel parameters */ | |
454 | struct vmbus_channel_offer_channel { | |
455 | struct vmbus_channel_message_header header; | |
456 | struct vmbus_channel_offer offer; | |
457 | u32 child_relid; | |
458 | u8 monitorid; | |
29423b7e S |
459 | /* |
460 | * win7 and beyond splits this field into a bit field. | |
461 | */ | |
462 | u8 monitor_allocated:1; | |
463 | u8 reserved:7; | |
464 | /* | |
465 | * These are new fields added in win7 and later. | |
466 | * Do not access these fields without checking the | |
467 | * negotiated protocol. | |
468 | * | |
469 | * If "is_dedicated_interrupt" is set, we must not set the | |
470 | * associated bit in the channel bitmap while sending the | |
471 | * interrupt to the host. | |
472 | * | |
473 | * connection_id is to be used in signaling the host. | |
474 | */ | |
475 | u16 is_dedicated_interrupt:1; | |
476 | u16 reserved1:15; | |
477 | u32 connection_id; | |
b56dda06 S |
478 | } __packed; |
479 | ||
480 | /* Rescind Offer parameters */ | |
481 | struct vmbus_channel_rescind_offer { | |
482 | struct vmbus_channel_message_header header; | |
483 | u32 child_relid; | |
484 | } __packed; | |
485 | ||
4827ee1d SH |
486 | static inline u32 |
487 | hv_ringbuffer_pending_size(const struct hv_ring_buffer_info *rbi) | |
488 | { | |
489 | return rbi->ring_buffer->pending_send_sz; | |
490 | } | |
491 | ||
b56dda06 S |
492 | /* |
493 | * Request Offer -- no parameters, SynIC message contains the partition ID | |
494 | * Set Snoop -- no parameters, SynIC message contains the partition ID | |
495 | * Clear Snoop -- no parameters, SynIC message contains the partition ID | |
496 | * All Offers Delivered -- no parameters, SynIC message contains the partition | |
497 | * ID | |
498 | * Flush Client -- no parameters, SynIC message contains the partition ID | |
499 | */ | |
500 | ||
501 | /* Open Channel parameters */ | |
502 | struct vmbus_channel_open_channel { | |
503 | struct vmbus_channel_message_header header; | |
504 | ||
505 | /* Identifies the specific VMBus channel that is being opened. */ | |
506 | u32 child_relid; | |
507 | ||
508 | /* ID making a particular open request at a channel offer unique. */ | |
509 | u32 openid; | |
510 | ||
511 | /* GPADL for the channel's ring buffer. */ | |
512 | u32 ringbuffer_gpadlhandle; | |
513 | ||
abbf3b2a S |
514 | /* |
515 | * Starting with win8, this field will be used to specify | |
516 | * the target virtual processor on which to deliver the interrupt for | |
517 | * the host to guest communication. | |
518 | * Prior to win8, incoming channel interrupts would only | |
519 | * be delivered on cpu 0. Setting this value to 0 would | |
520 | * preserve the earlier behavior. | |
521 | */ | |
522 | u32 target_vp; | |
b56dda06 S |
523 | |
524 | /* | |
2a9d7de2 SH |
525 | * The upstream ring buffer begins at offset zero in the memory |
526 | * described by RingBufferGpadlHandle. The downstream ring buffer | |
527 | * follows it at this offset (in pages). | |
528 | */ | |
b56dda06 S |
529 | u32 downstream_ringbuffer_pageoffset; |
530 | ||
531 | /* User-specific data to be passed along to the server endpoint. */ | |
532 | unsigned char userdata[MAX_USER_DEFINED_BYTES]; | |
533 | } __packed; | |
534 | ||
535 | /* Open Channel Result parameters */ | |
536 | struct vmbus_channel_open_result { | |
537 | struct vmbus_channel_message_header header; | |
538 | u32 child_relid; | |
539 | u32 openid; | |
540 | u32 status; | |
541 | } __packed; | |
542 | ||
543 | /* Close channel parameters; */ | |
544 | struct vmbus_channel_close_channel { | |
545 | struct vmbus_channel_message_header header; | |
546 | u32 child_relid; | |
547 | } __packed; | |
548 | ||
549 | /* Channel Message GPADL */ | |
550 | #define GPADL_TYPE_RING_BUFFER 1 | |
551 | #define GPADL_TYPE_SERVER_SAVE_AREA 2 | |
552 | #define GPADL_TYPE_TRANSACTION 8 | |
553 | ||
554 | /* | |
555 | * The number of PFNs in a GPADL message is defined by the number of | |
556 | * pages that would be spanned by ByteCount and ByteOffset. If the | |
557 | * implied number of PFNs won't fit in this packet, there will be a | |
558 | * follow-up packet that contains more. | |
559 | */ | |
560 | struct vmbus_channel_gpadl_header { | |
561 | struct vmbus_channel_message_header header; | |
562 | u32 child_relid; | |
563 | u32 gpadl; | |
564 | u16 range_buflen; | |
565 | u16 rangecount; | |
db5871e8 | 566 | struct gpa_range range[]; |
b56dda06 S |
567 | } __packed; |
568 | ||
569 | /* This is the followup packet that contains more PFNs. */ | |
570 | struct vmbus_channel_gpadl_body { | |
571 | struct vmbus_channel_message_header header; | |
572 | u32 msgnumber; | |
573 | u32 gpadl; | |
db5871e8 | 574 | u64 pfn[]; |
b56dda06 S |
575 | } __packed; |
576 | ||
577 | struct vmbus_channel_gpadl_created { | |
578 | struct vmbus_channel_message_header header; | |
579 | u32 child_relid; | |
580 | u32 gpadl; | |
581 | u32 creation_status; | |
582 | } __packed; | |
583 | ||
584 | struct vmbus_channel_gpadl_teardown { | |
585 | struct vmbus_channel_message_header header; | |
586 | u32 child_relid; | |
587 | u32 gpadl; | |
588 | } __packed; | |
589 | ||
590 | struct vmbus_channel_gpadl_torndown { | |
591 | struct vmbus_channel_message_header header; | |
592 | u32 gpadl; | |
593 | } __packed; | |
594 | ||
b56dda06 S |
595 | struct vmbus_channel_relid_released { |
596 | struct vmbus_channel_message_header header; | |
597 | u32 child_relid; | |
598 | } __packed; | |
599 | ||
600 | struct vmbus_channel_initiate_contact { | |
601 | struct vmbus_channel_message_header header; | |
602 | u32 vmbus_version_requested; | |
e28bab48 | 603 | u32 target_vcpu; /* The VCPU the host should respond to */ |
ae20b254 DC |
604 | union { |
605 | u64 interrupt_page; | |
606 | struct { | |
607 | u8 msg_sint; | |
608 | u8 padding1[3]; | |
609 | u32 padding2; | |
610 | }; | |
611 | }; | |
b56dda06 S |
612 | u64 monitor_page1; |
613 | u64 monitor_page2; | |
614 | } __packed; | |
615 | ||
5c23a1a5 DC |
616 | /* Hyper-V socket: guest's connect()-ing to host */ |
617 | struct vmbus_channel_tl_connect_request { | |
618 | struct vmbus_channel_message_header header; | |
593db803 AS |
619 | guid_t guest_endpoint_id; |
620 | guid_t host_service_id; | |
5c23a1a5 DC |
621 | } __packed; |
622 | ||
75278105 APM |
623 | /* Modify Channel parameters, cf. vmbus_send_modifychannel() */ |
624 | struct vmbus_channel_modifychannel { | |
625 | struct vmbus_channel_message_header header; | |
626 | u32 child_relid; | |
627 | u32 target_vp; | |
628 | } __packed; | |
629 | ||
b56dda06 S |
630 | struct vmbus_channel_version_response { |
631 | struct vmbus_channel_message_header header; | |
1508d811 | 632 | u8 version_supported; |
ae20b254 DC |
633 | |
634 | u8 connection_state; | |
635 | u16 padding; | |
636 | ||
637 | /* | |
638 | * On new hosts that support VMBus protocol 5.0, we must use | |
639 | * VMBUS_MESSAGE_CONNECTION_ID_4 for the Initiate Contact Message, | |
640 | * and for subsequent messages, we must use the Message Connection ID | |
641 | * field in the host-returned Version Response Message. | |
642 | * | |
643 | * On old hosts, we should always use VMBUS_MESSAGE_CONNECTION_ID (1). | |
644 | */ | |
645 | u32 msg_conn_id; | |
b56dda06 S |
646 | } __packed; |
647 | ||
648 | enum vmbus_channel_state { | |
649 | CHANNEL_OFFER_STATE, | |
650 | CHANNEL_OPENING_STATE, | |
651 | CHANNEL_OPEN_STATE, | |
e68d2971 | 652 | CHANNEL_OPENED_STATE, |
b56dda06 S |
653 | }; |
654 | ||
b56dda06 S |
655 | /* |
656 | * Represents each channel msg on the vmbus connection This is a | |
657 | * variable-size data structure depending on the msg type itself | |
658 | */ | |
659 | struct vmbus_channel_msginfo { | |
660 | /* Bookkeeping stuff */ | |
661 | struct list_head msglistentry; | |
662 | ||
663 | /* So far, this is only used to handle gpadl body message */ | |
664 | struct list_head submsglist; | |
665 | ||
666 | /* Synchronize the request/response if needed */ | |
667 | struct completion waitevent; | |
ccb61f8a | 668 | struct vmbus_channel *waiting_channel; |
b56dda06 S |
669 | union { |
670 | struct vmbus_channel_version_supported version_supported; | |
671 | struct vmbus_channel_open_result open_result; | |
672 | struct vmbus_channel_gpadl_torndown gpadl_torndown; | |
673 | struct vmbus_channel_gpadl_created gpadl_created; | |
674 | struct vmbus_channel_version_response version_response; | |
675 | } response; | |
676 | ||
677 | u32 msgsize; | |
678 | /* | |
679 | * The channel message that goes out on the "wire". | |
680 | * It will contain at minimum the VMBUS_CHANNEL_MESSAGE_HEADER header | |
681 | */ | |
db5871e8 | 682 | unsigned char msg[]; |
b56dda06 S |
683 | }; |
684 | ||
f9f1db83 S |
685 | struct vmbus_close_msg { |
686 | struct vmbus_channel_msginfo info; | |
687 | struct vmbus_channel_close_channel msg; | |
688 | }; | |
689 | ||
b3bf60c7 S |
690 | /* Define connection identifier type. */ |
691 | union hv_connection_id { | |
692 | u32 asu32; | |
693 | struct { | |
694 | u32 id:24; | |
695 | u32 reserved:8; | |
696 | } u; | |
697 | }; | |
698 | ||
7047f17d S |
699 | enum vmbus_device_type { |
700 | HV_IDE = 0, | |
701 | HV_SCSI, | |
702 | HV_FC, | |
703 | HV_NIC, | |
704 | HV_ND, | |
705 | HV_PCIE, | |
706 | HV_FB, | |
707 | HV_KBD, | |
708 | HV_MOUSE, | |
709 | HV_KVP, | |
710 | HV_TS, | |
711 | HV_HB, | |
712 | HV_SHUTDOWN, | |
713 | HV_FCOPY, | |
714 | HV_BACKUP, | |
715 | HV_DM, | |
f45be72c | 716 | HV_UNKNOWN, |
7047f17d S |
717 | }; |
718 | ||
719 | struct vmbus_device { | |
720 | u16 dev_type; | |
593db803 | 721 | guid_t guid; |
7047f17d S |
722 | bool perf_device; |
723 | }; | |
724 | ||
7d7c75cd S |
725 | struct vmbus_channel { |
726 | struct list_head listentry; | |
727 | ||
728 | struct hv_device *device_obj; | |
729 | ||
7d7c75cd | 730 | enum vmbus_channel_state state; |
7d7c75cd S |
731 | |
732 | struct vmbus_channel_offer_channel offermsg; | |
733 | /* | |
734 | * These are based on the OfferMsg.MonitorId. | |
735 | * Save it here for easy access. | |
736 | */ | |
737 | u8 monitor_grp; | |
738 | u8 monitor_bit; | |
739 | ||
c3582a2c | 740 | bool rescind; /* got rescind msg */ |
7fa32e5e | 741 | struct completion rescind_event; |
c3582a2c | 742 | |
7d7c75cd S |
743 | u32 ringbuffer_gpadlhandle; |
744 | ||
745 | /* Allocated memory for ring buffer */ | |
52a42c2a | 746 | struct page *ringbuffer_page; |
7d7c75cd | 747 | u32 ringbuffer_pagecount; |
ae6935ed | 748 | u32 ringbuffer_send_offset; |
7d7c75cd S |
749 | struct hv_ring_buffer_info outbound; /* send to parent */ |
750 | struct hv_ring_buffer_info inbound; /* receive from parent */ | |
7d7c75cd | 751 | |
f9f1db83 S |
752 | struct vmbus_close_msg close_msg; |
753 | ||
6981fbf3 SH |
754 | /* Statistics */ |
755 | u64 interrupts; /* Host to Guest interrupts */ | |
756 | u64 sig_events; /* Guest to Host events */ | |
757 | ||
396ae57e KB |
758 | /* |
759 | * Guest to host interrupts caused by the outbound ring buffer changing | |
760 | * from empty to not empty. | |
761 | */ | |
762 | u64 intr_out_empty; | |
763 | ||
764 | /* | |
765 | * Indicates that a full outbound ring buffer was encountered. The flag | |
766 | * is set to true when a full outbound ring buffer is encountered and | |
767 | * set to false when a write to the outbound ring buffer is completed. | |
768 | */ | |
769 | bool out_full_flag; | |
770 | ||
51c6ce2a | 771 | /* Channel callback's invoked in softirq context */ |
631e63a9 | 772 | struct tasklet_struct callback_event; |
7d7c75cd S |
773 | void (*onchannel_callback)(void *context); |
774 | void *channel_callback_context; | |
132368bd | 775 | |
7769e18c APM |
776 | void (*change_target_cpu_callback)(struct vmbus_channel *channel, |
777 | u32 old, u32 new); | |
778 | ||
9403b66e APM |
779 | /* |
780 | * Synchronize channel scheduling and channel removal; see the inline | |
781 | * comments in vmbus_chan_sched() and vmbus_reset_channel_cb(). | |
782 | */ | |
783 | spinlock_t sched_lock; | |
784 | ||
132368bd | 785 | /* |
b71e3282 SH |
786 | * A channel can be marked for one of three modes of reading: |
787 | * BATCHED - callback called from taslket and should read | |
788 | * channel until empty. Interrupts from the host | |
789 | * are masked while read is in process (default). | |
790 | * DIRECT - callback called from tasklet (softirq). | |
791 | * ISR - callback called in interrupt context and must | |
792 | * invoke its own deferred processing. | |
793 | * Host interrupts are disabled and must be re-enabled | |
794 | * when ring is empty. | |
132368bd | 795 | */ |
b71e3282 SH |
796 | enum hv_callback_mode { |
797 | HV_CALL_BATCHED, | |
798 | HV_CALL_DIRECT, | |
799 | HV_CALL_ISR | |
800 | } callback_mode; | |
b3bf60c7 S |
801 | |
802 | bool is_dedicated_interrupt; | |
05784171 | 803 | u64 sig_event; |
abbf3b2a S |
804 | |
805 | /* | |
806 | * Starting with win8, this field will be used to specify | |
807 | * the target virtual processor on which to deliver the interrupt for | |
808 | * the host to guest communication. | |
809 | * Prior to win8, incoming channel interrupts would only | |
810 | * be delivered on cpu 0. Setting this value to 0 would | |
811 | * preserve the earlier behavior. | |
812 | */ | |
813 | u32 target_vp; | |
d3ba720d S |
814 | /* The corresponding CPUID in the guest */ |
815 | u32 target_cpu; | |
1f656ff3 | 816 | int numa_node; |
e68d2971 S |
817 | /* |
818 | * Support for sub-channels. For high performance devices, | |
819 | * it will be useful to have multiple sub-channels to support | |
820 | * a scalable communication infrastructure with the host. | |
821 | * The support for sub-channels is implemented as an extention | |
822 | * to the current infrastructure. | |
823 | * The initial offer is considered the primary channel and this | |
824 | * offer message will indicate if the host supports sub-channels. | |
825 | * The guest is free to ask for sub-channels to be offerred and can | |
826 | * open these sub-channels as a normal "primary" channel. However, | |
827 | * all sub-channels will have the same type and instance guids as the | |
828 | * primary channel. Requests sent on a given channel will result in a | |
829 | * response on the same channel. | |
830 | */ | |
831 | ||
832 | /* | |
833 | * Sub-channel creation callback. This callback will be called in | |
834 | * process context when a sub-channel offer is received from the host. | |
835 | * The guest can open the sub-channel in the context of this callback. | |
836 | */ | |
837 | void (*sc_creation_callback)(struct vmbus_channel *new_sc); | |
838 | ||
499e8401 DC |
839 | /* |
840 | * Channel rescind callback. Some channels (the hvsock ones), need to | |
841 | * register a callback which is invoked in vmbus_onoffer_rescind(). | |
842 | */ | |
843 | void (*chn_rescind_callback)(struct vmbus_channel *channel); | |
844 | ||
67fae053 VK |
845 | /* |
846 | * The spinlock to protect the structure. It is being used to protect | |
847 | * test-and-set access to various attributes of the structure as well | |
848 | * as all sc_list operations. | |
849 | */ | |
850 | spinlock_t lock; | |
e68d2971 S |
851 | /* |
852 | * All Sub-channels of a primary channel are linked here. | |
853 | */ | |
854 | struct list_head sc_list; | |
855 | /* | |
856 | * The primary channel this sub-channel belongs to. | |
857 | * This will be NULL for the primary channel. | |
858 | */ | |
859 | struct vmbus_channel *primary_channel; | |
8a7206a8 S |
860 | /* |
861 | * Support per-channel state for use by vmbus drivers. | |
862 | */ | |
863 | void *per_channel_state; | |
8200f208 SH |
864 | |
865 | /* | |
866 | * Defer freeing channel until after all cpu's have | |
867 | * gone through grace period. | |
868 | */ | |
869 | struct rcu_head rcu; | |
870 | ||
c2e5df61 SH |
871 | /* |
872 | * For sysfs per-channel properties. | |
873 | */ | |
874 | struct kobject kobj; | |
875 | ||
3724287c S |
876 | /* |
877 | * For performance critical channels (storage, networking | |
878 | * etc,), Hyper-V has a mechanism to enhance the throughput | |
879 | * at the expense of latency: | |
880 | * When the host is to be signaled, we just set a bit in a shared page | |
881 | * and this bit will be inspected by the hypervisor within a certain | |
882 | * window and if the bit is set, the host will be signaled. The window | |
883 | * of time is the monitor latency - currently around 100 usecs. This | |
884 | * mechanism improves throughput by: | |
885 | * | |
886 | * A) Making the host more efficient - each time it wakes up, | |
887 | * potentially it will process morev number of packets. The | |
888 | * monitor latency allows a batch to build up. | |
889 | * B) By deferring the hypercall to signal, we will also minimize | |
890 | * the interrupts. | |
891 | * | |
892 | * Clearly, these optimizations improve throughput at the expense of | |
893 | * latency. Furthermore, since the channel is shared for both | |
894 | * control and data messages, control messages currently suffer | |
895 | * unnecessary latency adversley impacting performance and boot | |
896 | * time. To fix this issue, permit tagging the channel as being | |
897 | * in "low latency" mode. In this mode, we will bypass the monitor | |
898 | * mechanism. | |
899 | */ | |
900 | bool low_latency; | |
fe760e4d | 901 | |
6f3d791f S |
902 | bool probe_done; |
903 | ||
afaa33da APM |
904 | /* |
905 | * Cache the device ID here for easy access; this is useful, in | |
906 | * particular, in situations where the channel's device_obj has | |
907 | * not been allocated/initialized yet. | |
908 | */ | |
909 | u16 device_id; | |
910 | ||
37c2578c DC |
911 | /* |
912 | * We must offload the handling of the primary/sub channels | |
913 | * from the single-threaded vmbus_connection.work_queue to | |
914 | * two different workqueue, otherwise we can block | |
915 | * vmbus_connection.work_queue and hang: see vmbus_process_offer(). | |
916 | */ | |
917 | struct work_struct add_channel_work; | |
396ae57e KB |
918 | |
919 | /* | |
920 | * Guest to host interrupts caused by the inbound ring buffer changing | |
921 | * from full to not full while a packet is waiting. | |
922 | */ | |
923 | u64 intr_in_full; | |
924 | ||
925 | /* | |
926 | * The total number of write operations that encountered a full | |
927 | * outbound ring buffer. | |
928 | */ | |
929 | u64 out_full_total; | |
930 | ||
931 | /* | |
932 | * The number of write operations that were the first to encounter a | |
933 | * full outbound ring buffer. | |
934 | */ | |
935 | u64 out_full_first; | |
af9ca6f9 BB |
936 | |
937 | /* enabling/disabling fuzz testing on the channel (default is false)*/ | |
938 | bool fuzz_testing_state; | |
939 | ||
940 | /* | |
941 | * Interrupt delay will delay the guest from emptying the ring buffer | |
942 | * for a specific amount of time. The delay is in microseconds and will | |
943 | * be between 1 to a maximum of 1000, its default is 0 (no delay). | |
944 | * The Message delay will delay guest reading on a per message basis | |
945 | * in microseconds between 1 to 1000 with the default being 0 | |
946 | * (no delay). | |
947 | */ | |
948 | u32 fuzz_testing_interrupt_delay; | |
949 | u32 fuzz_testing_message_delay; | |
950 | ||
7d7c75cd | 951 | }; |
b56dda06 | 952 | |
e8d6ca02 DC |
953 | static inline bool is_hvsock_channel(const struct vmbus_channel *c) |
954 | { | |
955 | return !!(c->offermsg.offer.chn_flags & | |
956 | VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER); | |
957 | } | |
958 | ||
ed56ef67 DC |
959 | static inline bool is_sub_channel(const struct vmbus_channel *c) |
960 | { | |
961 | return c->offermsg.offer.sub_channel_index != 0; | |
962 | } | |
963 | ||
b71e3282 SH |
964 | static inline void set_channel_read_mode(struct vmbus_channel *c, |
965 | enum hv_callback_mode mode) | |
132368bd | 966 | { |
b71e3282 | 967 | c->callback_mode = mode; |
132368bd S |
968 | } |
969 | ||
8a7206a8 S |
970 | static inline void set_per_channel_state(struct vmbus_channel *c, void *s) |
971 | { | |
972 | c->per_channel_state = s; | |
973 | } | |
974 | ||
975 | static inline void *get_per_channel_state(struct vmbus_channel *c) | |
976 | { | |
977 | return c->per_channel_state; | |
978 | } | |
979 | ||
3c75354d DC |
980 | static inline void set_channel_pending_send_size(struct vmbus_channel *c, |
981 | u32 size) | |
982 | { | |
396ae57e KB |
983 | unsigned long flags; |
984 | ||
985 | if (size) { | |
986 | spin_lock_irqsave(&c->outbound.ring_lock, flags); | |
987 | ++c->out_full_total; | |
988 | ||
989 | if (!c->out_full_flag) { | |
990 | ++c->out_full_first; | |
991 | c->out_full_flag = true; | |
992 | } | |
993 | spin_unlock_irqrestore(&c->outbound.ring_lock, flags); | |
994 | } else { | |
995 | c->out_full_flag = false; | |
996 | } | |
997 | ||
3c75354d DC |
998 | c->outbound.ring_buffer->pending_send_sz = size; |
999 | } | |
1000 | ||
3724287c S |
1001 | static inline void set_low_latency_mode(struct vmbus_channel *c) |
1002 | { | |
1003 | c->low_latency = true; | |
1004 | } | |
1005 | ||
1006 | static inline void clear_low_latency_mode(struct vmbus_channel *c) | |
1007 | { | |
1008 | c->low_latency = false; | |
1009 | } | |
1010 | ||
5cc41500 | 1011 | void vmbus_onmessage(struct vmbus_channel_message_header *hdr); |
b56dda06 S |
1012 | |
1013 | int vmbus_request_offers(void); | |
1014 | ||
e68d2971 S |
1015 | /* |
1016 | * APIs for managing sub-channels. | |
1017 | */ | |
1018 | ||
1019 | void vmbus_set_sc_create_callback(struct vmbus_channel *primary_channel, | |
1020 | void (*sc_cr_cb)(struct vmbus_channel *new_sc)); | |
1021 | ||
499e8401 DC |
1022 | void vmbus_set_chn_rescind_callback(struct vmbus_channel *channel, |
1023 | void (*chn_rescind_cb)(struct vmbus_channel *)); | |
1024 | ||
e68d2971 S |
1025 | /* |
1026 | * Check if sub-channels have already been offerred. This API will be useful | |
1027 | * when the driver is unloaded after establishing sub-channels. In this case, | |
1028 | * when the driver is re-loaded, the driver would have to check if the | |
1029 | * subchannels have already been established before attempting to request | |
1030 | * the creation of sub-channels. | |
1031 | * This function returns TRUE to indicate that subchannels have already been | |
1032 | * created. | |
1033 | * This function should be invoked after setting the callback function for | |
1034 | * sub-channel creation. | |
1035 | */ | |
1036 | bool vmbus_are_subchannels_present(struct vmbus_channel *primary); | |
1037 | ||
c35470b2 S |
1038 | /* The format must be the same as struct vmdata_gpa_direct */ |
1039 | struct vmbus_channel_packet_page_buffer { | |
1040 | u16 type; | |
1041 | u16 dataoffset8; | |
1042 | u16 length8; | |
1043 | u16 flags; | |
1044 | u64 transactionid; | |
1045 | u32 reserved; | |
1046 | u32 rangecount; | |
1047 | struct hv_page_buffer range[MAX_PAGE_BUFFER_COUNT]; | |
1048 | } __packed; | |
1049 | ||
1050 | /* The format must be the same as struct vmdata_gpa_direct */ | |
1051 | struct vmbus_channel_packet_multipage_buffer { | |
1052 | u16 type; | |
1053 | u16 dataoffset8; | |
1054 | u16 length8; | |
1055 | u16 flags; | |
1056 | u64 transactionid; | |
1057 | u32 reserved; | |
1058 | u32 rangecount; /* Always 1 in this case */ | |
1059 | struct hv_multipage_buffer range; | |
1060 | } __packed; | |
1061 | ||
d61031ee S |
1062 | /* The format must be the same as struct vmdata_gpa_direct */ |
1063 | struct vmbus_packet_mpb_array { | |
1064 | u16 type; | |
1065 | u16 dataoffset8; | |
1066 | u16 length8; | |
1067 | u16 flags; | |
1068 | u64 transactionid; | |
1069 | u32 reserved; | |
1070 | u32 rangecount; /* Always 1 in this case */ | |
1071 | struct hv_mpb_array range; | |
1072 | } __packed; | |
1073 | ||
ae6935ed SH |
1074 | int vmbus_alloc_ring(struct vmbus_channel *channel, |
1075 | u32 send_size, u32 recv_size); | |
1076 | void vmbus_free_ring(struct vmbus_channel *channel); | |
1077 | ||
1078 | int vmbus_connect_ring(struct vmbus_channel *channel, | |
1079 | void (*onchannel_callback)(void *context), | |
1080 | void *context); | |
1081 | int vmbus_disconnect_ring(struct vmbus_channel *channel); | |
c35470b2 S |
1082 | |
1083 | extern int vmbus_open(struct vmbus_channel *channel, | |
1084 | u32 send_ringbuffersize, | |
1085 | u32 recv_ringbuffersize, | |
1086 | void *userdata, | |
1087 | u32 userdatalen, | |
2a9d7de2 | 1088 | void (*onchannel_callback)(void *context), |
c35470b2 S |
1089 | void *context); |
1090 | ||
1091 | extern void vmbus_close(struct vmbus_channel *channel); | |
1092 | ||
1093 | extern int vmbus_sendpacket(struct vmbus_channel *channel, | |
011a7c3c | 1094 | void *buffer, |
c35470b2 S |
1095 | u32 bufferLen, |
1096 | u64 requestid, | |
1097 | enum vmbus_packet_type type, | |
1098 | u32 flags); | |
1099 | ||
1100 | extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, | |
1101 | struct hv_page_buffer pagebuffers[], | |
1102 | u32 pagecount, | |
1103 | void *buffer, | |
1104 | u32 bufferlen, | |
1105 | u64 requestid); | |
1106 | ||
d61031ee S |
1107 | extern int vmbus_sendpacket_mpb_desc(struct vmbus_channel *channel, |
1108 | struct vmbus_packet_mpb_array *mpb, | |
1109 | u32 desc_size, | |
1110 | void *buffer, | |
1111 | u32 bufferlen, | |
1112 | u64 requestid); | |
1113 | ||
c35470b2 S |
1114 | extern int vmbus_establish_gpadl(struct vmbus_channel *channel, |
1115 | void *kbuffer, | |
1116 | u32 size, | |
1117 | u32 *gpadl_handle); | |
1118 | ||
1119 | extern int vmbus_teardown_gpadl(struct vmbus_channel *channel, | |
1120 | u32 gpadl_handle); | |
1121 | ||
d3b26dd7 DC |
1122 | void vmbus_reset_channel_cb(struct vmbus_channel *channel); |
1123 | ||
c35470b2 S |
1124 | extern int vmbus_recvpacket(struct vmbus_channel *channel, |
1125 | void *buffer, | |
1126 | u32 bufferlen, | |
1127 | u32 *buffer_actual_len, | |
1128 | u64 *requestid); | |
1129 | ||
1130 | extern int vmbus_recvpacket_raw(struct vmbus_channel *channel, | |
1131 | void *buffer, | |
1132 | u32 bufferlen, | |
1133 | u32 *buffer_actual_len, | |
1134 | u64 *requestid); | |
1135 | ||
c35470b2 | 1136 | |
c35470b2 S |
1137 | extern void vmbus_ontimer(unsigned long data); |
1138 | ||
35ea09c3 S |
1139 | /* Base driver object */ |
1140 | struct hv_driver { | |
1141 | const char *name; | |
1142 | ||
8981da32 DC |
1143 | /* |
1144 | * A hvsock offer, which has a VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER | |
1145 | * channel flag, actually doesn't mean a synthetic device because the | |
1146 | * offer's if_type/if_instance can change for every new hvsock | |
1147 | * connection. | |
1148 | * | |
1149 | * However, to facilitate the notification of new-offer/rescind-offer | |
1150 | * from vmbus driver to hvsock driver, we can handle hvsock offer as | |
1151 | * a special vmbus device, and hence we need the below flag to | |
1152 | * indicate if the driver is the hvsock driver or not: we need to | |
1153 | * specially treat the hvosck offer & driver in vmbus_match(). | |
1154 | */ | |
1155 | bool hvsock; | |
1156 | ||
35ea09c3 | 1157 | /* the device type supported by this driver */ |
593db803 | 1158 | guid_t dev_type; |
2e2c1d17 | 1159 | const struct hv_vmbus_device_id *id_table; |
35ea09c3 S |
1160 | |
1161 | struct device_driver driver; | |
1162 | ||
fc76936d SH |
1163 | /* dynamic device GUID's */ |
1164 | struct { | |
1165 | spinlock_t lock; | |
1166 | struct list_head list; | |
1167 | } dynids; | |
1168 | ||
84946899 | 1169 | int (*probe)(struct hv_device *, const struct hv_vmbus_device_id *); |
35ea09c3 S |
1170 | int (*remove)(struct hv_device *); |
1171 | void (*shutdown)(struct hv_device *); | |
1172 | ||
271b2224 DC |
1173 | int (*suspend)(struct hv_device *); |
1174 | int (*resume)(struct hv_device *); | |
35ea09c3 S |
1175 | |
1176 | }; | |
1177 | ||
1178 | /* Base device object */ | |
1179 | struct hv_device { | |
1180 | /* the device type id of this device */ | |
593db803 | 1181 | guid_t dev_type; |
35ea09c3 S |
1182 | |
1183 | /* the device instance id of this device */ | |
593db803 | 1184 | guid_t dev_instance; |
7047f17d S |
1185 | u16 vendor_id; |
1186 | u16 device_id; | |
35ea09c3 S |
1187 | |
1188 | struct device device; | |
d765edbb | 1189 | char *driver_override; /* Driver name to force a match */ |
35ea09c3 S |
1190 | |
1191 | struct vmbus_channel *channel; | |
c2e5df61 | 1192 | struct kset *channels_kset; |
af9ca6f9 BB |
1193 | |
1194 | /* place holder to keep track of the dir for hv device in debugfs */ | |
1195 | struct dentry *debug_dir; | |
1196 | ||
35ea09c3 S |
1197 | }; |
1198 | ||
27b5b3ca S |
1199 | |
1200 | static inline struct hv_device *device_to_hv_device(struct device *d) | |
1201 | { | |
1202 | return container_of(d, struct hv_device, device); | |
1203 | } | |
1204 | ||
1205 | static inline struct hv_driver *drv_to_hv_drv(struct device_driver *d) | |
1206 | { | |
1207 | return container_of(d, struct hv_driver, driver); | |
1208 | } | |
1209 | ||
ab101e86 S |
1210 | static inline void hv_set_drvdata(struct hv_device *dev, void *data) |
1211 | { | |
1212 | dev_set_drvdata(&dev->device, data); | |
1213 | } | |
1214 | ||
1215 | static inline void *hv_get_drvdata(struct hv_device *dev) | |
1216 | { | |
1217 | return dev_get_drvdata(&dev->device); | |
1218 | } | |
27b5b3ca | 1219 | |
4827ee1d SH |
1220 | struct hv_ring_buffer_debug_info { |
1221 | u32 current_interrupt_mask; | |
1222 | u32 current_read_index; | |
1223 | u32 current_write_index; | |
1224 | u32 bytes_avail_toread; | |
1225 | u32 bytes_avail_towrite; | |
1226 | }; | |
1227 | ||
ba50bf1c | 1228 | |
14948e39 | 1229 | int hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info, |
ba50bf1c | 1230 | struct hv_ring_buffer_debug_info *debug_info); |
4827ee1d | 1231 | |
27b5b3ca | 1232 | /* Vmbus interface */ |
768fa219 GKH |
1233 | #define vmbus_driver_register(driver) \ |
1234 | __vmbus_driver_register(driver, THIS_MODULE, KBUILD_MODNAME) | |
1235 | int __must_check __vmbus_driver_register(struct hv_driver *hv_driver, | |
1236 | struct module *owner, | |
1237 | const char *mod_name); | |
1238 | void vmbus_driver_unregister(struct hv_driver *hv_driver); | |
27b5b3ca | 1239 | |
85d9aa70 DC |
1240 | void vmbus_hvsock_device_unregister(struct vmbus_channel *channel); |
1241 | ||
35464483 JO |
1242 | int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj, |
1243 | resource_size_t min, resource_size_t max, | |
1244 | resource_size_t size, resource_size_t align, | |
1245 | bool fb_overlap_ok); | |
97fb77dc | 1246 | void vmbus_free_mmio(resource_size_t start, resource_size_t size); |
619848bd | 1247 | |
7fb96565 S |
1248 | /* |
1249 | * GUID definitions of various offer types - services offered to the guest. | |
1250 | */ | |
1251 | ||
1252 | /* | |
1253 | * Network GUID | |
1254 | * {f8615163-df3e-46c5-913f-f2d2f965ed0e} | |
1255 | */ | |
1256 | #define HV_NIC_GUID \ | |
593db803 AS |
1257 | .guid = GUID_INIT(0xf8615163, 0xdf3e, 0x46c5, 0x91, 0x3f, \ |
1258 | 0xf2, 0xd2, 0xf9, 0x65, 0xed, 0x0e) | |
7fb96565 S |
1259 | |
1260 | /* | |
1261 | * IDE GUID | |
1262 | * {32412632-86cb-44a2-9b5c-50d1417354f5} | |
1263 | */ | |
1264 | #define HV_IDE_GUID \ | |
593db803 AS |
1265 | .guid = GUID_INIT(0x32412632, 0x86cb, 0x44a2, 0x9b, 0x5c, \ |
1266 | 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5) | |
7fb96565 S |
1267 | |
1268 | /* | |
1269 | * SCSI GUID | |
1270 | * {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} | |
1271 | */ | |
1272 | #define HV_SCSI_GUID \ | |
593db803 AS |
1273 | .guid = GUID_INIT(0xba6163d9, 0x04a1, 0x4d29, 0xb6, 0x05, \ |
1274 | 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f) | |
7fb96565 S |
1275 | |
1276 | /* | |
1277 | * Shutdown GUID | |
1278 | * {0e0b6031-5213-4934-818b-38d90ced39db} | |
1279 | */ | |
1280 | #define HV_SHUTDOWN_GUID \ | |
593db803 AS |
1281 | .guid = GUID_INIT(0x0e0b6031, 0x5213, 0x4934, 0x81, 0x8b, \ |
1282 | 0x38, 0xd9, 0x0c, 0xed, 0x39, 0xdb) | |
7fb96565 S |
1283 | |
1284 | /* | |
1285 | * Time Synch GUID | |
1286 | * {9527E630-D0AE-497b-ADCE-E80AB0175CAF} | |
1287 | */ | |
1288 | #define HV_TS_GUID \ | |
593db803 AS |
1289 | .guid = GUID_INIT(0x9527e630, 0xd0ae, 0x497b, 0xad, 0xce, \ |
1290 | 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf) | |
7fb96565 S |
1291 | |
1292 | /* | |
1293 | * Heartbeat GUID | |
1294 | * {57164f39-9115-4e78-ab55-382f3bd5422d} | |
1295 | */ | |
1296 | #define HV_HEART_BEAT_GUID \ | |
593db803 AS |
1297 | .guid = GUID_INIT(0x57164f39, 0x9115, 0x4e78, 0xab, 0x55, \ |
1298 | 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d) | |
7fb96565 S |
1299 | |
1300 | /* | |
1301 | * KVP GUID | |
1302 | * {a9a0f4e7-5a45-4d96-b827-8a841e8c03e6} | |
1303 | */ | |
1304 | #define HV_KVP_GUID \ | |
593db803 AS |
1305 | .guid = GUID_INIT(0xa9a0f4e7, 0x5a45, 0x4d96, 0xb8, 0x27, \ |
1306 | 0x8a, 0x84, 0x1e, 0x8c, 0x03, 0xe6) | |
7fb96565 S |
1307 | |
1308 | /* | |
1309 | * Dynamic memory GUID | |
1310 | * {525074dc-8985-46e2-8057-a307dc18a502} | |
1311 | */ | |
1312 | #define HV_DM_GUID \ | |
593db803 AS |
1313 | .guid = GUID_INIT(0x525074dc, 0x8985, 0x46e2, 0x80, 0x57, \ |
1314 | 0xa3, 0x07, 0xdc, 0x18, 0xa5, 0x02) | |
7fb96565 S |
1315 | |
1316 | /* | |
1317 | * Mouse GUID | |
1318 | * {cfa8b69e-5b4a-4cc0-b98b-8ba1a1f3f95a} | |
1319 | */ | |
1320 | #define HV_MOUSE_GUID \ | |
593db803 AS |
1321 | .guid = GUID_INIT(0xcfa8b69e, 0x5b4a, 0x4cc0, 0xb9, 0x8b, \ |
1322 | 0x8b, 0xa1, 0xa1, 0xf3, 0xf9, 0x5a) | |
7fb96565 | 1323 | |
2048157a DC |
1324 | /* |
1325 | * Keyboard GUID | |
1326 | * {f912ad6d-2b17-48ea-bd65-f927a61c7684} | |
1327 | */ | |
1328 | #define HV_KBD_GUID \ | |
593db803 AS |
1329 | .guid = GUID_INIT(0xf912ad6d, 0x2b17, 0x48ea, 0xbd, 0x65, \ |
1330 | 0xf9, 0x27, 0xa6, 0x1c, 0x76, 0x84) | |
2048157a | 1331 | |
96dd86fa S |
1332 | /* |
1333 | * VSS (Backup/Restore) GUID | |
1334 | */ | |
1335 | #define HV_VSS_GUID \ | |
593db803 AS |
1336 | .guid = GUID_INIT(0x35fa2e29, 0xea23, 0x4236, 0x96, 0xae, \ |
1337 | 0x3a, 0x6e, 0xba, 0xcb, 0xa4, 0x40) | |
68a2d20b HZ |
1338 | /* |
1339 | * Synthetic Video GUID | |
1340 | * {DA0A7802-E377-4aac-8E77-0558EB1073F8} | |
1341 | */ | |
1342 | #define HV_SYNTHVID_GUID \ | |
593db803 AS |
1343 | .guid = GUID_INIT(0xda0a7802, 0xe377, 0x4aac, 0x8e, 0x77, \ |
1344 | 0x05, 0x58, 0xeb, 0x10, 0x73, 0xf8) | |
68a2d20b | 1345 | |
98b80d89 S |
1346 | /* |
1347 | * Synthetic FC GUID | |
1348 | * {2f9bcc4a-0069-4af3-b76b-6fd0be528cda} | |
1349 | */ | |
1350 | #define HV_SYNTHFC_GUID \ | |
593db803 AS |
1351 | .guid = GUID_INIT(0x2f9bcc4a, 0x0069, 0x4af3, 0xb7, 0x6b, \ |
1352 | 0x6f, 0xd0, 0xbe, 0x52, 0x8c, 0xda) | |
98b80d89 | 1353 | |
01325476 S |
1354 | /* |
1355 | * Guest File Copy Service | |
1356 | * {34D14BE3-DEE4-41c8-9AE7-6B174977C192} | |
1357 | */ | |
1358 | ||
1359 | #define HV_FCOPY_GUID \ | |
593db803 AS |
1360 | .guid = GUID_INIT(0x34d14be3, 0xdee4, 0x41c8, 0x9a, 0xe7, \ |
1361 | 0x6b, 0x17, 0x49, 0x77, 0xc1, 0x92) | |
01325476 | 1362 | |
04653a00 S |
1363 | /* |
1364 | * NetworkDirect. This is the guest RDMA service. | |
1365 | * {8c2eaf3d-32a7-4b09-ab99-bd1f1c86b501} | |
1366 | */ | |
1367 | #define HV_ND_GUID \ | |
593db803 AS |
1368 | .guid = GUID_INIT(0x8c2eaf3d, 0x32a7, 0x4b09, 0xab, 0x99, \ |
1369 | 0xbd, 0x1f, 0x1c, 0x86, 0xb5, 0x01) | |
04653a00 | 1370 | |
3053c762 JO |
1371 | /* |
1372 | * PCI Express Pass Through | |
1373 | * {44C4F61D-4444-4400-9D52-802E27EDE19F} | |
1374 | */ | |
1375 | ||
1376 | #define HV_PCIE_GUID \ | |
593db803 AS |
1377 | .guid = GUID_INIT(0x44c4f61d, 0x4444, 0x4400, 0x9d, 0x52, \ |
1378 | 0x80, 0x2e, 0x27, 0xed, 0xe1, 0x9f) | |
3053c762 | 1379 | |
0f98829a DC |
1380 | /* |
1381 | * Linux doesn't support the 3 devices: the first two are for | |
1382 | * Automatic Virtual Machine Activation, and the third is for | |
1383 | * Remote Desktop Virtualization. | |
1384 | * {f8e65716-3cb3-4a06-9a60-1889c5cccab5} | |
1385 | * {3375baf4-9e15-4b30-b765-67acb10d607b} | |
1386 | * {276aacf4-ac15-426c-98dd-7521ad3f01fe} | |
1387 | */ | |
1388 | ||
1389 | #define HV_AVMA1_GUID \ | |
593db803 AS |
1390 | .guid = GUID_INIT(0xf8e65716, 0x3cb3, 0x4a06, 0x9a, 0x60, \ |
1391 | 0x18, 0x89, 0xc5, 0xcc, 0xca, 0xb5) | |
0f98829a DC |
1392 | |
1393 | #define HV_AVMA2_GUID \ | |
593db803 AS |
1394 | .guid = GUID_INIT(0x3375baf4, 0x9e15, 0x4b30, 0xb7, 0x65, \ |
1395 | 0x67, 0xac, 0xb1, 0x0d, 0x60, 0x7b) | |
0f98829a DC |
1396 | |
1397 | #define HV_RDV_GUID \ | |
593db803 AS |
1398 | .guid = GUID_INIT(0x276aacf4, 0xac15, 0x426c, 0x98, 0xdd, \ |
1399 | 0x75, 0x21, 0xad, 0x3f, 0x01, 0xfe) | |
0f98829a | 1400 | |
b189702d S |
1401 | /* |
1402 | * Common header for Hyper-V ICs | |
1403 | */ | |
1404 | ||
1405 | #define ICMSGTYPE_NEGOTIATE 0 | |
1406 | #define ICMSGTYPE_HEARTBEAT 1 | |
1407 | #define ICMSGTYPE_KVPEXCHANGE 2 | |
1408 | #define ICMSGTYPE_SHUTDOWN 3 | |
1409 | #define ICMSGTYPE_TIMESYNC 4 | |
1410 | #define ICMSGTYPE_VSS 5 | |
1411 | ||
1412 | #define ICMSGHDRFLAG_TRANSACTION 1 | |
1413 | #define ICMSGHDRFLAG_REQUEST 2 | |
1414 | #define ICMSGHDRFLAG_RESPONSE 4 | |
1415 | ||
b189702d | 1416 | |
a29b643c S |
1417 | /* |
1418 | * While we want to handle util services as regular devices, | |
1419 | * there is only one instance of each of these services; so | |
1420 | * we statically allocate the service specific state. | |
1421 | */ | |
1422 | ||
1423 | struct hv_util_service { | |
1424 | u8 *recv_buffer; | |
b9830d12 | 1425 | void *channel; |
a29b643c S |
1426 | void (*util_cb)(void *); |
1427 | int (*util_init)(struct hv_util_service *); | |
1428 | void (*util_deinit)(void); | |
54e19d34 DC |
1429 | int (*util_pre_suspend)(void); |
1430 | int (*util_pre_resume)(void); | |
a29b643c S |
1431 | }; |
1432 | ||
b189702d S |
1433 | struct vmbuspipe_hdr { |
1434 | u32 flags; | |
1435 | u32 msgsize; | |
1436 | } __packed; | |
1437 | ||
1438 | struct ic_version { | |
1439 | u16 major; | |
1440 | u16 minor; | |
1441 | } __packed; | |
1442 | ||
1443 | struct icmsg_hdr { | |
1444 | struct ic_version icverframe; | |
1445 | u16 icmsgtype; | |
1446 | struct ic_version icvermsg; | |
1447 | u16 icmsgsize; | |
1448 | u32 status; | |
1449 | u8 ictransaction_id; | |
1450 | u8 icflags; | |
1451 | u8 reserved[2]; | |
1452 | } __packed; | |
1453 | ||
1454 | struct icmsg_negotiate { | |
1455 | u16 icframe_vercnt; | |
1456 | u16 icmsg_vercnt; | |
1457 | u32 reserved; | |
1458 | struct ic_version icversion_data[1]; /* any size array */ | |
1459 | } __packed; | |
1460 | ||
1461 | struct shutdown_msg_data { | |
1462 | u32 reason_code; | |
1463 | u32 timeout_seconds; | |
1464 | u32 flags; | |
1465 | u8 display_message[2048]; | |
1466 | } __packed; | |
1467 | ||
1468 | struct heartbeat_msg_data { | |
1469 | u64 seq_num; | |
1470 | u32 reserved[8]; | |
1471 | } __packed; | |
1472 | ||
1473 | /* Time Sync IC defs */ | |
1474 | #define ICTIMESYNCFLAG_PROBE 0 | |
1475 | #define ICTIMESYNCFLAG_SYNC 1 | |
1476 | #define ICTIMESYNCFLAG_SAMPLE 2 | |
1477 | ||
1478 | #ifdef __x86_64__ | |
1479 | #define WLTIMEDELTA 116444736000000000L /* in 100ns unit */ | |
1480 | #else | |
1481 | #define WLTIMEDELTA 116444736000000000LL | |
1482 | #endif | |
1483 | ||
1484 | struct ictimesync_data { | |
1485 | u64 parenttime; | |
1486 | u64 childtime; | |
1487 | u64 roundtriptime; | |
1488 | u8 flags; | |
1489 | } __packed; | |
1490 | ||
8e1d2607 AN |
1491 | struct ictimesync_ref_data { |
1492 | u64 parenttime; | |
1493 | u64 vmreferencetime; | |
1494 | u8 flags; | |
1495 | char leapflags; | |
1496 | char stratum; | |
1497 | u8 reserved[3]; | |
1498 | } __packed; | |
1499 | ||
b189702d S |
1500 | struct hyperv_service_callback { |
1501 | u8 msg_type; | |
1502 | char *log_msg; | |
593db803 | 1503 | guid_t data; |
b189702d | 1504 | struct vmbus_channel *channel; |
2a9d7de2 | 1505 | void (*callback)(void *context); |
b189702d S |
1506 | }; |
1507 | ||
c836d0ab | 1508 | #define MAX_SRV_VER 0x7ffffff |
a1656454 AN |
1509 | extern bool vmbus_prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, u8 *buf, |
1510 | const int *fw_version, int fw_vercnt, | |
1511 | const int *srv_version, int srv_vercnt, | |
1512 | int *nego_fw_version, int *nego_srv_version); | |
b189702d | 1513 | |
800b9329 | 1514 | void hv_process_channel_removal(struct vmbus_channel *channel); |
96dd86fa | 1515 | |
1f6ee4e7 | 1516 | void vmbus_setevent(struct vmbus_channel *channel); |
37f7278b S |
1517 | /* |
1518 | * Negotiated version with the Host. | |
1519 | */ | |
1520 | ||
1521 | extern __u32 vmbus_proto_version; | |
1522 | ||
593db803 AS |
1523 | int vmbus_send_tl_connect_request(const guid_t *shv_guest_servie_id, |
1524 | const guid_t *shv_host_servie_id); | |
75278105 | 1525 | int vmbus_send_modifychannel(u32 child_relid, u32 target_vp); |
5cc47247 | 1526 | void vmbus_set_event(struct vmbus_channel *channel); |
687f32e6 S |
1527 | |
1528 | /* Get the start of the ring buffer. */ | |
1529 | static inline void * | |
e4165a0f | 1530 | hv_get_ring_buffer(const struct hv_ring_buffer_info *ring_info) |
687f32e6 | 1531 | { |
e4165a0f | 1532 | return ring_info->ring_buffer->buffer; |
687f32e6 S |
1533 | } |
1534 | ||
6e47dd3e SH |
1535 | /* |
1536 | * Mask off host interrupt callback notifications | |
1537 | */ | |
1538 | static inline void hv_begin_read(struct hv_ring_buffer_info *rbi) | |
1539 | { | |
1540 | rbi->ring_buffer->interrupt_mask = 1; | |
1541 | ||
1542 | /* make sure mask update is not reordered */ | |
1543 | virt_mb(); | |
1544 | } | |
1545 | ||
1546 | /* | |
1547 | * Re-enable host callback and return number of outstanding bytes | |
1548 | */ | |
1549 | static inline u32 hv_end_read(struct hv_ring_buffer_info *rbi) | |
1550 | { | |
1551 | ||
1552 | rbi->ring_buffer->interrupt_mask = 0; | |
1553 | ||
1554 | /* make sure mask update is not reordered */ | |
1555 | virt_mb(); | |
1556 | ||
1557 | /* | |
1558 | * Now check to see if the ring buffer is still empty. | |
1559 | * If it is not, we raced and we need to process new | |
1560 | * incoming messages. | |
1561 | */ | |
1562 | return hv_get_bytes_to_read(rbi); | |
1563 | } | |
1564 | ||
ab028db4 S |
1565 | /* |
1566 | * An API to support in-place processing of incoming VMBUS packets. | |
1567 | */ | |
ab028db4 | 1568 | |
f3dd3f47 | 1569 | /* Get data payload associated with descriptor */ |
1570 | static inline void *hv_pkt_data(const struct vmpacket_descriptor *desc) | |
ab028db4 | 1571 | { |
f3dd3f47 | 1572 | return (void *)((unsigned long)desc + (desc->offset8 << 3)); |
ab028db4 S |
1573 | } |
1574 | ||
f3dd3f47 | 1575 | /* Get data size associated with descriptor */ |
1576 | static inline u32 hv_pkt_datalen(const struct vmpacket_descriptor *desc) | |
ab028db4 | 1577 | { |
f3dd3f47 | 1578 | return (desc->len8 << 3) - (desc->offset8 << 3); |
ab028db4 S |
1579 | } |
1580 | ||
f3dd3f47 | 1581 | |
1582 | struct vmpacket_descriptor * | |
1583 | hv_pkt_iter_first(struct vmbus_channel *channel); | |
1584 | ||
1585 | struct vmpacket_descriptor * | |
1586 | __hv_pkt_iter_next(struct vmbus_channel *channel, | |
1587 | const struct vmpacket_descriptor *pkt); | |
1588 | ||
1589 | void hv_pkt_iter_close(struct vmbus_channel *channel); | |
1590 | ||
ab028db4 | 1591 | /* |
f3dd3f47 | 1592 | * Get next packet descriptor from iterator |
1593 | * If at end of list, return NULL and update host. | |
ab028db4 | 1594 | */ |
f3dd3f47 | 1595 | static inline struct vmpacket_descriptor * |
1596 | hv_pkt_iter_next(struct vmbus_channel *channel, | |
1597 | const struct vmpacket_descriptor *pkt) | |
ab028db4 | 1598 | { |
f3dd3f47 | 1599 | struct vmpacket_descriptor *nxt; |
1600 | ||
1601 | nxt = __hv_pkt_iter_next(channel, pkt); | |
1602 | if (!nxt) | |
1603 | hv_pkt_iter_close(channel); | |
ab028db4 | 1604 | |
f3dd3f47 | 1605 | return nxt; |
ab028db4 S |
1606 | } |
1607 | ||
f3dd3f47 | 1608 | #define foreach_vmbus_pkt(pkt, channel) \ |
1609 | for (pkt = hv_pkt_iter_first(channel); pkt; \ | |
1610 | pkt = hv_pkt_iter_next(channel, pkt)) | |
ab028db4 | 1611 | |
e5d2f910 | 1612 | /* |
348dd93e | 1613 | * Interface for passing data between SR-IOV PF and VF drivers. The VF driver |
e5d2f910 DC |
1614 | * sends requests to read and write blocks. Each block must be 128 bytes or |
1615 | * smaller. Optionally, the VF driver can register a callback function which | |
1616 | * will be invoked when the host says that one or more of the first 64 block | |
1617 | * IDs is "invalid" which means that the VF driver should reread them. | |
1618 | */ | |
1619 | #define HV_CONFIG_BLOCK_SIZE_MAX 128 | |
348dd93e HZ |
1620 | |
1621 | int hyperv_read_cfg_blk(struct pci_dev *dev, void *buf, unsigned int buf_len, | |
1622 | unsigned int block_id, unsigned int *bytes_returned); | |
1623 | int hyperv_write_cfg_blk(struct pci_dev *dev, void *buf, unsigned int len, | |
1624 | unsigned int block_id); | |
1625 | int hyperv_reg_block_invalidate(struct pci_dev *dev, void *context, | |
1626 | void (*block_invalidate)(void *context, | |
1627 | u64 block_mask)); | |
1628 | ||
1629 | struct hyperv_pci_block_ops { | |
1630 | int (*read_block)(struct pci_dev *dev, void *buf, unsigned int buf_len, | |
1631 | unsigned int block_id, unsigned int *bytes_returned); | |
1632 | int (*write_block)(struct pci_dev *dev, void *buf, unsigned int len, | |
1633 | unsigned int block_id); | |
1634 | int (*reg_blk_invalidate)(struct pci_dev *dev, void *context, | |
1635 | void (*block_invalidate)(void *context, | |
1636 | u64 block_mask)); | |
1637 | }; | |
1638 | ||
1639 | extern struct hyperv_pci_block_ops hvpci_block_ops; | |
1640 | ||
3f335ea2 | 1641 | #endif /* _HYPERV_H */ |