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K. Y. Srinivasan5c473402011-05-12 19:34:14 -07001/*
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 */
K. Y. Srinivasan3f335ea2011-05-12 19:34:15 -070024
25#ifndef _HYPERV_H
26#define _HYPERV_H
27
Bjarke Istrup Pedersen5267cf02014-01-22 09:16:58 +000028#include <uapi/linux/hyperv.h>
29
K. Y. Srinivasan29394372012-01-27 15:55:58 -080030#include <linux/types.h>
K. Y. Srinivasan8ff3e6f2011-05-12 19:34:27 -070031#include <linux/scatterlist.h>
32#include <linux/list.h>
33#include <linux/timer.h>
34#include <linux/workqueue.h>
35#include <linux/completion.h>
36#include <linux/device.h>
K. Y. Srinivasan2e2c1d12011-08-25 09:48:31 -070037#include <linux/mod_devicetable.h>
K. Y. Srinivasan8ff3e6f2011-05-12 19:34:27 -070038
39
K. Y. Srinivasan7e5ec362014-03-07 00:10:34 -080040#define MAX_PAGE_BUFFER_COUNT 32
K. Y. Srinivasana363bf72011-05-12 19:34:16 -070041#define MAX_MULTIPAGE_BUFFER_COUNT 32 /* 128K */
42
43#pragma pack(push, 1)
44
45/* Single-page buffer */
46struct hv_page_buffer {
47 u32 len;
48 u32 offset;
49 u64 pfn;
50};
51
52/* Multiple-page buffer */
53struct 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
60/* 0x18 includes the proprietary packet header */
61#define MAX_PAGE_BUFFER_PACKET (0x18 + \
62 (sizeof(struct hv_page_buffer) * \
63 MAX_PAGE_BUFFER_COUNT))
64#define MAX_MULTIPAGE_BUFFER_PACKET (0x18 + \
65 sizeof(struct hv_multipage_buffer))
66
67
68#pragma pack(pop)
69
K. Y. Srinivasan7effffb2011-05-12 19:34:17 -070070struct hv_ring_buffer {
71 /* Offset in bytes from the start of ring data below */
72 u32 write_index;
73
74 /* Offset in bytes from the start of ring data below */
75 u32 read_index;
76
77 u32 interrupt_mask;
78
K. Y. Srinivasan24166032012-12-01 06:46:39 -080079 /*
80 * Win8 uses some of the reserved bits to implement
81 * interrupt driven flow management. On the send side
82 * we can request that the receiver interrupt the sender
83 * when the ring transitions from being full to being able
84 * to handle a message of size "pending_send_sz".
85 *
86 * Add necessary state for this enhancement.
K. Y. Srinivasan7effffb2011-05-12 19:34:17 -070087 */
K. Y. Srinivasan24166032012-12-01 06:46:39 -080088 u32 pending_send_sz;
89
90 u32 reserved1[12];
91
92 union {
93 struct {
94 u32 feat_pending_send_sz:1;
95 };
96 u32 value;
97 } feature_bits;
98
99 /* Pad it to PAGE_SIZE so that data starts on page boundary */
100 u8 reserved2[4028];
K. Y. Srinivasan7effffb2011-05-12 19:34:17 -0700101
102 /*
103 * Ring data starts here + RingDataStartOffset
104 * !!! DO NOT place any fields below this !!!
105 */
106 u8 buffer[0];
107} __packed;
108
109struct hv_ring_buffer_info {
110 struct hv_ring_buffer *ring_buffer;
111 u32 ring_size; /* Include the shared header */
112 spinlock_t ring_lock;
113
114 u32 ring_datasize; /* < ring_size */
115 u32 ring_data_startoffset;
116};
117
Haiyang Zhang33be96e2012-03-27 13:20:45 +0000118/*
119 *
120 * hv_get_ringbuffer_availbytes()
121 *
122 * Get number of bytes available to read and to write to
123 * for the specified ring buffer
124 */
125static inline void
126hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi,
127 u32 *read, u32 *write)
128{
129 u32 read_loc, write_loc, dsize;
130
131 smp_read_barrier_depends();
132
133 /* Capture the read/write indices before they changed */
134 read_loc = rbi->ring_buffer->read_index;
135 write_loc = rbi->ring_buffer->write_index;
136 dsize = rbi->ring_datasize;
137
138 *write = write_loc >= read_loc ? dsize - (write_loc - read_loc) :
139 read_loc - write_loc;
140 *read = dsize - *write;
141}
142
K. Y. Srinivasaneafa7072012-12-01 06:46:44 -0800143/*
144 * VMBUS version is 32 bit entity broken up into
145 * two 16 bit quantities: major_number. minor_number.
146 *
147 * 0 . 13 (Windows Server 2008)
148 * 1 . 1 (Windows 7)
149 * 2 . 4 (Windows 8)
K. Y. Srinivasan03367ef2014-04-03 18:02:45 -0700150 * 3 . 0 (Windows 8 R2)
K. Y. Srinivasaneafa7072012-12-01 06:46:44 -0800151 */
152
153#define VERSION_WS2008 ((0 << 16) | (13))
154#define VERSION_WIN7 ((1 << 16) | (1))
155#define VERSION_WIN8 ((2 << 16) | (4))
K. Y. Srinivasan03367ef2014-04-03 18:02:45 -0700156#define VERSION_WIN8_1 ((3 << 16) | (0))
K. Y. Srinivasaneafa7072012-12-01 06:46:44 -0800157
158#define VERSION_INVAL -1
159
K. Y. Srinivasan03367ef2014-04-03 18:02:45 -0700160#define VERSION_CURRENT VERSION_WIN8_1
K. Y. Srinivasanf7c6dfd2011-05-12 19:34:18 -0700161
K. Y. Srinivasan517d8dc2011-05-12 19:34:19 -0700162/* Make maximum size of pipe payload of 16K */
163#define MAX_PIPE_DATA_PAYLOAD (sizeof(u8) * 16384)
164
165/* Define PipeMode values. */
166#define VMBUS_PIPE_TYPE_BYTE 0x00000000
167#define VMBUS_PIPE_TYPE_MESSAGE 0x00000004
168
169/* The size of the user defined data buffer for non-pipe offers. */
170#define MAX_USER_DEFINED_BYTES 120
171
172/* The size of the user defined data buffer for pipe offers. */
173#define MAX_PIPE_USER_DEFINED_BYTES 116
174
175/*
176 * At the center of the Channel Management library is the Channel Offer. This
177 * struct contains the fundamental information about an offer.
178 */
179struct vmbus_channel_offer {
K. Y. Srinivasan358d2ee2011-08-25 09:48:28 -0700180 uuid_le if_type;
181 uuid_le if_instance;
K. Y. Srinivasan29423b72012-12-01 06:46:40 -0800182
183 /*
184 * These two fields are not currently used.
185 */
186 u64 reserved1;
187 u64 reserved2;
188
K. Y. Srinivasan517d8dc2011-05-12 19:34:19 -0700189 u16 chn_flags;
190 u16 mmio_megabytes; /* in bytes * 1024 * 1024 */
191
192 union {
193 /* Non-pipes: The user has MAX_USER_DEFINED_BYTES bytes. */
194 struct {
195 unsigned char user_def[MAX_USER_DEFINED_BYTES];
196 } std;
197
198 /*
199 * Pipes:
200 * The following sructure is an integrated pipe protocol, which
201 * is implemented on top of standard user-defined data. Pipe
202 * clients have MAX_PIPE_USER_DEFINED_BYTES left for their own
203 * use.
204 */
205 struct {
206 u32 pipe_mode;
207 unsigned char user_def[MAX_PIPE_USER_DEFINED_BYTES];
208 } pipe;
209 } u;
K. Y. Srinivasan29423b72012-12-01 06:46:40 -0800210 /*
211 * The sub_channel_index is defined in win8.
212 */
213 u16 sub_channel_index;
214 u16 reserved3;
K. Y. Srinivasan517d8dc2011-05-12 19:34:19 -0700215} __packed;
216
217/* Server Flags */
218#define VMBUS_CHANNEL_ENUMERATE_DEVICE_INTERFACE 1
219#define VMBUS_CHANNEL_SERVER_SUPPORTS_TRANSFER_PAGES 2
220#define VMBUS_CHANNEL_SERVER_SUPPORTS_GPADLS 4
221#define VMBUS_CHANNEL_NAMED_PIPE_MODE 0x10
222#define VMBUS_CHANNEL_LOOPBACK_OFFER 0x100
223#define VMBUS_CHANNEL_PARENT_OFFER 0x200
224#define VMBUS_CHANNEL_REQUEST_MONITORED_NOTIFICATION 0x400
225
K. Y. Srinivasan50ed40e2011-05-12 19:34:20 -0700226struct vmpacket_descriptor {
227 u16 type;
228 u16 offset8;
229 u16 len8;
230 u16 flags;
231 u64 trans_id;
232} __packed;
233
234struct vmpacket_header {
235 u32 prev_pkt_start_offset;
236 struct vmpacket_descriptor descriptor;
237} __packed;
238
239struct vmtransfer_page_range {
240 u32 byte_count;
241 u32 byte_offset;
242} __packed;
243
244struct vmtransfer_page_packet_header {
245 struct vmpacket_descriptor d;
246 u16 xfer_pageset_id;
K. Y. Srinivasan1508d812012-08-16 08:23:20 -0700247 u8 sender_owns_set;
K. Y. Srinivasan50ed40e2011-05-12 19:34:20 -0700248 u8 reserved;
249 u32 range_cnt;
250 struct vmtransfer_page_range ranges[1];
251} __packed;
252
253struct vmgpadl_packet_header {
254 struct vmpacket_descriptor d;
255 u32 gpadl;
256 u32 reserved;
257} __packed;
258
259struct vmadd_remove_transfer_page_set {
260 struct vmpacket_descriptor d;
261 u32 gpadl;
262 u16 xfer_pageset_id;
263 u16 reserved;
264} __packed;
265
266/*
267 * This structure defines a range in guest physical space that can be made to
268 * look virtually contiguous.
269 */
270struct gpa_range {
271 u32 byte_count;
272 u32 byte_offset;
273 u64 pfn_array[0];
274};
275
276/*
277 * This is the format for an Establish Gpadl packet, which contains a handle by
278 * which this GPADL will be known and a set of GPA ranges associated with it.
279 * This can be converted to a MDL by the guest OS. If there are multiple GPA
280 * ranges, then the resulting MDL will be "chained," representing multiple VA
281 * ranges.
282 */
283struct vmestablish_gpadl {
284 struct vmpacket_descriptor d;
285 u32 gpadl;
286 u32 range_cnt;
287 struct gpa_range range[1];
288} __packed;
289
290/*
291 * This is the format for a Teardown Gpadl packet, which indicates that the
292 * GPADL handle in the Establish Gpadl packet will never be referenced again.
293 */
294struct vmteardown_gpadl {
295 struct vmpacket_descriptor d;
296 u32 gpadl;
297 u32 reserved; /* for alignment to a 8-byte boundary */
298} __packed;
299
300/*
301 * This is the format for a GPA-Direct packet, which contains a set of GPA
302 * ranges, in addition to commands and/or data.
303 */
304struct vmdata_gpa_direct {
305 struct vmpacket_descriptor d;
306 u32 reserved;
307 u32 range_cnt;
308 struct gpa_range range[1];
309} __packed;
310
311/* This is the format for a Additional Data Packet. */
312struct vmadditional_data {
313 struct vmpacket_descriptor d;
314 u64 total_bytes;
315 u32 offset;
316 u32 byte_cnt;
317 unsigned char data[1];
318} __packed;
319
320union vmpacket_largest_possible_header {
321 struct vmpacket_descriptor simple_hdr;
322 struct vmtransfer_page_packet_header xfer_page_hdr;
323 struct vmgpadl_packet_header gpadl_hdr;
324 struct vmadd_remove_transfer_page_set add_rm_xfer_page_hdr;
325 struct vmestablish_gpadl establish_gpadl_hdr;
326 struct vmteardown_gpadl teardown_gpadl_hdr;
327 struct vmdata_gpa_direct data_gpa_direct_hdr;
328};
329
330#define VMPACKET_DATA_START_ADDRESS(__packet) \
331 (void *)(((unsigned char *)__packet) + \
332 ((struct vmpacket_descriptor)__packet)->offset8 * 8)
333
334#define VMPACKET_DATA_LENGTH(__packet) \
335 ((((struct vmpacket_descriptor)__packet)->len8 - \
336 ((struct vmpacket_descriptor)__packet)->offset8) * 8)
337
338#define VMPACKET_TRANSFER_MODE(__packet) \
339 (((struct IMPACT)__packet)->type)
340
341enum vmbus_packet_type {
342 VM_PKT_INVALID = 0x0,
343 VM_PKT_SYNCH = 0x1,
344 VM_PKT_ADD_XFER_PAGESET = 0x2,
345 VM_PKT_RM_XFER_PAGESET = 0x3,
346 VM_PKT_ESTABLISH_GPADL = 0x4,
347 VM_PKT_TEARDOWN_GPADL = 0x5,
348 VM_PKT_DATA_INBAND = 0x6,
349 VM_PKT_DATA_USING_XFER_PAGES = 0x7,
350 VM_PKT_DATA_USING_GPADL = 0x8,
351 VM_PKT_DATA_USING_GPA_DIRECT = 0x9,
352 VM_PKT_CANCEL_REQUEST = 0xa,
353 VM_PKT_COMP = 0xb,
354 VM_PKT_DATA_USING_ADDITIONAL_PKT = 0xc,
355 VM_PKT_ADDITIONAL_DATA = 0xd
356};
357
358#define VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED 1
K. Y. Srinivasan517d8dc2011-05-12 19:34:19 -0700359
K. Y. Srinivasanb56dda02011-05-12 19:34:21 -0700360
K. Y. Srinivasanb56dda02011-05-12 19:34:21 -0700361/* Version 1 messages */
362enum vmbus_channel_message_type {
363 CHANNELMSG_INVALID = 0,
364 CHANNELMSG_OFFERCHANNEL = 1,
365 CHANNELMSG_RESCIND_CHANNELOFFER = 2,
366 CHANNELMSG_REQUESTOFFERS = 3,
367 CHANNELMSG_ALLOFFERS_DELIVERED = 4,
368 CHANNELMSG_OPENCHANNEL = 5,
369 CHANNELMSG_OPENCHANNEL_RESULT = 6,
370 CHANNELMSG_CLOSECHANNEL = 7,
371 CHANNELMSG_GPADL_HEADER = 8,
372 CHANNELMSG_GPADL_BODY = 9,
373 CHANNELMSG_GPADL_CREATED = 10,
374 CHANNELMSG_GPADL_TEARDOWN = 11,
375 CHANNELMSG_GPADL_TORNDOWN = 12,
376 CHANNELMSG_RELID_RELEASED = 13,
377 CHANNELMSG_INITIATE_CONTACT = 14,
378 CHANNELMSG_VERSION_RESPONSE = 15,
379 CHANNELMSG_UNLOAD = 16,
380#ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
381 CHANNELMSG_VIEWRANGE_ADD = 17,
382 CHANNELMSG_VIEWRANGE_REMOVE = 18,
383#endif
384 CHANNELMSG_COUNT
385};
386
387struct vmbus_channel_message_header {
388 enum vmbus_channel_message_type msgtype;
389 u32 padding;
390} __packed;
391
392/* Query VMBus Version parameters */
393struct vmbus_channel_query_vmbus_version {
394 struct vmbus_channel_message_header header;
395 u32 version;
396} __packed;
397
398/* VMBus Version Supported parameters */
399struct vmbus_channel_version_supported {
400 struct vmbus_channel_message_header header;
K. Y. Srinivasan1508d812012-08-16 08:23:20 -0700401 u8 version_supported;
K. Y. Srinivasanb56dda02011-05-12 19:34:21 -0700402} __packed;
403
404/* Offer Channel parameters */
405struct vmbus_channel_offer_channel {
406 struct vmbus_channel_message_header header;
407 struct vmbus_channel_offer offer;
408 u32 child_relid;
409 u8 monitorid;
K. Y. Srinivasan29423b72012-12-01 06:46:40 -0800410 /*
411 * win7 and beyond splits this field into a bit field.
412 */
413 u8 monitor_allocated:1;
414 u8 reserved:7;
415 /*
416 * These are new fields added in win7 and later.
417 * Do not access these fields without checking the
418 * negotiated protocol.
419 *
420 * If "is_dedicated_interrupt" is set, we must not set the
421 * associated bit in the channel bitmap while sending the
422 * interrupt to the host.
423 *
424 * connection_id is to be used in signaling the host.
425 */
426 u16 is_dedicated_interrupt:1;
427 u16 reserved1:15;
428 u32 connection_id;
K. Y. Srinivasanb56dda02011-05-12 19:34:21 -0700429} __packed;
430
431/* Rescind Offer parameters */
432struct vmbus_channel_rescind_offer {
433 struct vmbus_channel_message_header header;
434 u32 child_relid;
435} __packed;
436
437/*
438 * Request Offer -- no parameters, SynIC message contains the partition ID
439 * Set Snoop -- no parameters, SynIC message contains the partition ID
440 * Clear Snoop -- no parameters, SynIC message contains the partition ID
441 * All Offers Delivered -- no parameters, SynIC message contains the partition
442 * ID
443 * Flush Client -- no parameters, SynIC message contains the partition ID
444 */
445
446/* Open Channel parameters */
447struct vmbus_channel_open_channel {
448 struct vmbus_channel_message_header header;
449
450 /* Identifies the specific VMBus channel that is being opened. */
451 u32 child_relid;
452
453 /* ID making a particular open request at a channel offer unique. */
454 u32 openid;
455
456 /* GPADL for the channel's ring buffer. */
457 u32 ringbuffer_gpadlhandle;
458
K. Y. Srinivasanabbf3b22012-12-01 06:46:48 -0800459 /*
460 * Starting with win8, this field will be used to specify
461 * the target virtual processor on which to deliver the interrupt for
462 * the host to guest communication.
463 * Prior to win8, incoming channel interrupts would only
464 * be delivered on cpu 0. Setting this value to 0 would
465 * preserve the earlier behavior.
466 */
467 u32 target_vp;
K. Y. Srinivasanb56dda02011-05-12 19:34:21 -0700468
469 /*
470 * The upstream ring buffer begins at offset zero in the memory
471 * described by RingBufferGpadlHandle. The downstream ring buffer
472 * follows it at this offset (in pages).
473 */
474 u32 downstream_ringbuffer_pageoffset;
475
476 /* User-specific data to be passed along to the server endpoint. */
477 unsigned char userdata[MAX_USER_DEFINED_BYTES];
478} __packed;
479
480/* Open Channel Result parameters */
481struct vmbus_channel_open_result {
482 struct vmbus_channel_message_header header;
483 u32 child_relid;
484 u32 openid;
485 u32 status;
486} __packed;
487
488/* Close channel parameters; */
489struct vmbus_channel_close_channel {
490 struct vmbus_channel_message_header header;
491 u32 child_relid;
492} __packed;
493
494/* Channel Message GPADL */
495#define GPADL_TYPE_RING_BUFFER 1
496#define GPADL_TYPE_SERVER_SAVE_AREA 2
497#define GPADL_TYPE_TRANSACTION 8
498
499/*
500 * The number of PFNs in a GPADL message is defined by the number of
501 * pages that would be spanned by ByteCount and ByteOffset. If the
502 * implied number of PFNs won't fit in this packet, there will be a
503 * follow-up packet that contains more.
504 */
505struct vmbus_channel_gpadl_header {
506 struct vmbus_channel_message_header header;
507 u32 child_relid;
508 u32 gpadl;
509 u16 range_buflen;
510 u16 rangecount;
511 struct gpa_range range[0];
512} __packed;
513
514/* This is the followup packet that contains more PFNs. */
515struct vmbus_channel_gpadl_body {
516 struct vmbus_channel_message_header header;
517 u32 msgnumber;
518 u32 gpadl;
519 u64 pfn[0];
520} __packed;
521
522struct vmbus_channel_gpadl_created {
523 struct vmbus_channel_message_header header;
524 u32 child_relid;
525 u32 gpadl;
526 u32 creation_status;
527} __packed;
528
529struct vmbus_channel_gpadl_teardown {
530 struct vmbus_channel_message_header header;
531 u32 child_relid;
532 u32 gpadl;
533} __packed;
534
535struct vmbus_channel_gpadl_torndown {
536 struct vmbus_channel_message_header header;
537 u32 gpadl;
538} __packed;
539
540#ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
541struct vmbus_channel_view_range_add {
542 struct vmbus_channel_message_header header;
543 PHYSICAL_ADDRESS viewrange_base;
544 u64 viewrange_length;
545 u32 child_relid;
546} __packed;
547
548struct vmbus_channel_view_range_remove {
549 struct vmbus_channel_message_header header;
550 PHYSICAL_ADDRESS viewrange_base;
551 u32 child_relid;
552} __packed;
553#endif
554
555struct vmbus_channel_relid_released {
556 struct vmbus_channel_message_header header;
557 u32 child_relid;
558} __packed;
559
560struct vmbus_channel_initiate_contact {
561 struct vmbus_channel_message_header header;
562 u32 vmbus_version_requested;
K. Y. Srinivasane28bab42014-01-15 17:12:58 -0800563 u32 target_vcpu; /* The VCPU the host should respond to */
K. Y. Srinivasanb56dda02011-05-12 19:34:21 -0700564 u64 interrupt_page;
565 u64 monitor_page1;
566 u64 monitor_page2;
567} __packed;
568
569struct vmbus_channel_version_response {
570 struct vmbus_channel_message_header header;
K. Y. Srinivasan1508d812012-08-16 08:23:20 -0700571 u8 version_supported;
K. Y. Srinivasanb56dda02011-05-12 19:34:21 -0700572} __packed;
573
574enum vmbus_channel_state {
575 CHANNEL_OFFER_STATE,
576 CHANNEL_OPENING_STATE,
577 CHANNEL_OPEN_STATE,
K. Y. Srinivasane68d2972013-05-23 12:02:32 -0700578 CHANNEL_OPENED_STATE,
K. Y. Srinivasanb56dda02011-05-12 19:34:21 -0700579};
580
K. Y. Srinivasanb56dda02011-05-12 19:34:21 -0700581/*
582 * Represents each channel msg on the vmbus connection This is a
583 * variable-size data structure depending on the msg type itself
584 */
585struct vmbus_channel_msginfo {
586 /* Bookkeeping stuff */
587 struct list_head msglistentry;
588
589 /* So far, this is only used to handle gpadl body message */
590 struct list_head submsglist;
591
592 /* Synchronize the request/response if needed */
593 struct completion waitevent;
594 union {
595 struct vmbus_channel_version_supported version_supported;
596 struct vmbus_channel_open_result open_result;
597 struct vmbus_channel_gpadl_torndown gpadl_torndown;
598 struct vmbus_channel_gpadl_created gpadl_created;
599 struct vmbus_channel_version_response version_response;
600 } response;
601
602 u32 msgsize;
603 /*
604 * The channel message that goes out on the "wire".
605 * It will contain at minimum the VMBUS_CHANNEL_MESSAGE_HEADER header
606 */
607 unsigned char msg[0];
608};
609
K. Y. Srinivasanf9f1db82011-06-06 15:49:58 -0700610struct vmbus_close_msg {
611 struct vmbus_channel_msginfo info;
612 struct vmbus_channel_close_channel msg;
613};
614
K. Y. Srinivasanb3bf60c2012-12-01 06:46:45 -0800615/* Define connection identifier type. */
616union hv_connection_id {
617 u32 asu32;
618 struct {
619 u32 id:24;
620 u32 reserved:8;
621 } u;
622};
623
624/* Definition of the hv_signal_event hypercall input structure. */
625struct hv_input_signal_event {
626 union hv_connection_id connectionid;
627 u16 flag_number;
628 u16 rsvdz;
629};
630
631struct hv_input_signal_event_buffer {
632 u64 align8;
633 struct hv_input_signal_event event;
634};
635
K. Y. Srinivasan7d7c75c2011-06-06 15:49:57 -0700636struct vmbus_channel {
637 struct list_head listentry;
638
639 struct hv_device *device_obj;
640
641 struct work_struct work;
642
643 enum vmbus_channel_state state;
K. Y. Srinivasan7d7c75c2011-06-06 15:49:57 -0700644
645 struct vmbus_channel_offer_channel offermsg;
646 /*
647 * These are based on the OfferMsg.MonitorId.
648 * Save it here for easy access.
649 */
650 u8 monitor_grp;
651 u8 monitor_bit;
652
Haiyang Zhangc3582a22014-12-01 13:28:39 -0800653 bool rescind; /* got rescind msg */
654
K. Y. Srinivasan7d7c75c2011-06-06 15:49:57 -0700655 u32 ringbuffer_gpadlhandle;
656
657 /* Allocated memory for ring buffer */
658 void *ringbuffer_pages;
659 u32 ringbuffer_pagecount;
660 struct hv_ring_buffer_info outbound; /* send to parent */
661 struct hv_ring_buffer_info inbound; /* receive from parent */
662 spinlock_t inbound_lock;
663 struct workqueue_struct *controlwq;
664
K. Y. Srinivasanf9f1db82011-06-06 15:49:58 -0700665 struct vmbus_close_msg close_msg;
666
K. Y. Srinivasan7d7c75c2011-06-06 15:49:57 -0700667 /* Channel callback are invoked in this workqueue context */
668 /* HANDLE dataWorkQueue; */
669
670 void (*onchannel_callback)(void *context);
671 void *channel_callback_context;
K. Y. Srinivasan132368b2012-12-01 06:46:33 -0800672
673 /*
674 * A channel can be marked for efficient (batched)
675 * reading:
676 * If batched_reading is set to "true", we read until the
677 * channel is empty and hold off interrupts from the host
678 * during the entire read process.
679 * If batched_reading is set to "false", the client is not
680 * going to perform batched reading.
681 *
682 * By default we will enable batched reading; specific
683 * drivers that don't want this behavior can turn it off.
684 */
685
686 bool batched_reading;
K. Y. Srinivasanb3bf60c2012-12-01 06:46:45 -0800687
688 bool is_dedicated_interrupt;
689 struct hv_input_signal_event_buffer sig_buf;
690 struct hv_input_signal_event *sig_event;
K. Y. Srinivasanabbf3b22012-12-01 06:46:48 -0800691
692 /*
693 * Starting with win8, this field will be used to specify
694 * the target virtual processor on which to deliver the interrupt for
695 * the host to guest communication.
696 * Prior to win8, incoming channel interrupts would only
697 * be delivered on cpu 0. Setting this value to 0 would
698 * preserve the earlier behavior.
699 */
700 u32 target_vp;
K. Y. Srinivasand3ba7202014-04-08 18:45:53 -0700701 /* The corresponding CPUID in the guest */
702 u32 target_cpu;
K. Y. Srinivasane68d2972013-05-23 12:02:32 -0700703 /*
704 * Support for sub-channels. For high performance devices,
705 * it will be useful to have multiple sub-channels to support
706 * a scalable communication infrastructure with the host.
707 * The support for sub-channels is implemented as an extention
708 * to the current infrastructure.
709 * The initial offer is considered the primary channel and this
710 * offer message will indicate if the host supports sub-channels.
711 * The guest is free to ask for sub-channels to be offerred and can
712 * open these sub-channels as a normal "primary" channel. However,
713 * all sub-channels will have the same type and instance guids as the
714 * primary channel. Requests sent on a given channel will result in a
715 * response on the same channel.
716 */
717
718 /*
719 * Sub-channel creation callback. This callback will be called in
720 * process context when a sub-channel offer is received from the host.
721 * The guest can open the sub-channel in the context of this callback.
722 */
723 void (*sc_creation_callback)(struct vmbus_channel *new_sc);
724
725 spinlock_t sc_lock;
726 /*
727 * All Sub-channels of a primary channel are linked here.
728 */
729 struct list_head sc_list;
730 /*
731 * The primary channel this sub-channel belongs to.
732 * This will be NULL for the primary channel.
733 */
734 struct vmbus_channel *primary_channel;
K. Y. Srinivasan8a7206a2014-02-03 12:42:45 -0800735 /*
736 * Support per-channel state for use by vmbus drivers.
737 */
738 void *per_channel_state;
K. Y. Srinivasan3a28fa32014-04-08 18:45:54 -0700739 /*
740 * To support per-cpu lookup mapping of relid to channel,
741 * link up channels based on their CPU affinity.
742 */
743 struct list_head percpu_list;
K. Y. Srinivasan7d7c75c2011-06-06 15:49:57 -0700744};
K. Y. Srinivasanb56dda02011-05-12 19:34:21 -0700745
K. Y. Srinivasan132368b2012-12-01 06:46:33 -0800746static inline void set_channel_read_state(struct vmbus_channel *c, bool state)
747{
748 c->batched_reading = state;
749}
750
K. Y. Srinivasan8a7206a2014-02-03 12:42:45 -0800751static inline void set_per_channel_state(struct vmbus_channel *c, void *s)
752{
753 c->per_channel_state = s;
754}
755
756static inline void *get_per_channel_state(struct vmbus_channel *c)
757{
758 return c->per_channel_state;
759}
760
K. Y. Srinivasanb56dda02011-05-12 19:34:21 -0700761void vmbus_onmessage(void *context);
762
763int vmbus_request_offers(void);
764
K. Y. Srinivasane68d2972013-05-23 12:02:32 -0700765/*
766 * APIs for managing sub-channels.
767 */
768
769void vmbus_set_sc_create_callback(struct vmbus_channel *primary_channel,
770 void (*sc_cr_cb)(struct vmbus_channel *new_sc));
771
772/*
773 * Retrieve the (sub) channel on which to send an outgoing request.
774 * When a primary channel has multiple sub-channels, we choose a
775 * channel whose VCPU binding is closest to the VCPU on which
776 * this call is being made.
777 */
778struct vmbus_channel *vmbus_get_outgoing_channel(struct vmbus_channel *primary);
779
780/*
781 * Check if sub-channels have already been offerred. This API will be useful
782 * when the driver is unloaded after establishing sub-channels. In this case,
783 * when the driver is re-loaded, the driver would have to check if the
784 * subchannels have already been established before attempting to request
785 * the creation of sub-channels.
786 * This function returns TRUE to indicate that subchannels have already been
787 * created.
788 * This function should be invoked after setting the callback function for
789 * sub-channel creation.
790 */
791bool vmbus_are_subchannels_present(struct vmbus_channel *primary);
792
K. Y. Srinivasanc35470b2011-05-12 19:34:22 -0700793/* The format must be the same as struct vmdata_gpa_direct */
794struct vmbus_channel_packet_page_buffer {
795 u16 type;
796 u16 dataoffset8;
797 u16 length8;
798 u16 flags;
799 u64 transactionid;
800 u32 reserved;
801 u32 rangecount;
802 struct hv_page_buffer range[MAX_PAGE_BUFFER_COUNT];
803} __packed;
804
805/* The format must be the same as struct vmdata_gpa_direct */
806struct vmbus_channel_packet_multipage_buffer {
807 u16 type;
808 u16 dataoffset8;
809 u16 length8;
810 u16 flags;
811 u64 transactionid;
812 u32 reserved;
813 u32 rangecount; /* Always 1 in this case */
814 struct hv_multipage_buffer range;
815} __packed;
816
817
818extern int vmbus_open(struct vmbus_channel *channel,
819 u32 send_ringbuffersize,
820 u32 recv_ringbuffersize,
821 void *userdata,
822 u32 userdatalen,
823 void(*onchannel_callback)(void *context),
824 void *context);
825
826extern void vmbus_close(struct vmbus_channel *channel);
827
828extern int vmbus_sendpacket(struct vmbus_channel *channel,
K. Y. Srinivasan011a7c32014-02-01 19:02:20 -0800829 void *buffer,
K. Y. Srinivasanc35470b2011-05-12 19:34:22 -0700830 u32 bufferLen,
831 u64 requestid,
832 enum vmbus_packet_type type,
833 u32 flags);
834
835extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
836 struct hv_page_buffer pagebuffers[],
837 u32 pagecount,
838 void *buffer,
839 u32 bufferlen,
840 u64 requestid);
841
842extern int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel,
843 struct hv_multipage_buffer *mpb,
844 void *buffer,
845 u32 bufferlen,
846 u64 requestid);
847
848extern int vmbus_establish_gpadl(struct vmbus_channel *channel,
849 void *kbuffer,
850 u32 size,
851 u32 *gpadl_handle);
852
853extern int vmbus_teardown_gpadl(struct vmbus_channel *channel,
854 u32 gpadl_handle);
855
856extern int vmbus_recvpacket(struct vmbus_channel *channel,
857 void *buffer,
858 u32 bufferlen,
859 u32 *buffer_actual_len,
860 u64 *requestid);
861
862extern int vmbus_recvpacket_raw(struct vmbus_channel *channel,
863 void *buffer,
864 u32 bufferlen,
865 u32 *buffer_actual_len,
866 u64 *requestid);
867
K. Y. Srinivasanc35470b2011-05-12 19:34:22 -0700868
K. Y. Srinivasanc35470b2011-05-12 19:34:22 -0700869extern void vmbus_ontimer(unsigned long data);
870
K. Y. Srinivasan35ea09c2011-05-12 19:34:24 -0700871/* Base driver object */
872struct hv_driver {
873 const char *name;
874
875 /* the device type supported by this driver */
K. Y. Srinivasan358d2ee2011-08-25 09:48:28 -0700876 uuid_le dev_type;
K. Y. Srinivasan2e2c1d12011-08-25 09:48:31 -0700877 const struct hv_vmbus_device_id *id_table;
K. Y. Srinivasan35ea09c2011-05-12 19:34:24 -0700878
879 struct device_driver driver;
880
K. Y. Srinivasan84946892011-09-13 10:59:38 -0700881 int (*probe)(struct hv_device *, const struct hv_vmbus_device_id *);
K. Y. Srinivasan35ea09c2011-05-12 19:34:24 -0700882 int (*remove)(struct hv_device *);
883 void (*shutdown)(struct hv_device *);
884
885};
886
887/* Base device object */
888struct hv_device {
889 /* the device type id of this device */
K. Y. Srinivasan358d2ee2011-08-25 09:48:28 -0700890 uuid_le dev_type;
K. Y. Srinivasan35ea09c2011-05-12 19:34:24 -0700891
892 /* the device instance id of this device */
K. Y. Srinivasan358d2ee2011-08-25 09:48:28 -0700893 uuid_le dev_instance;
K. Y. Srinivasan35ea09c2011-05-12 19:34:24 -0700894
895 struct device device;
896
897 struct vmbus_channel *channel;
K. Y. Srinivasan35ea09c2011-05-12 19:34:24 -0700898};
899
K. Y. Srinivasan27b5b3c2011-05-12 19:34:25 -0700900
901static inline struct hv_device *device_to_hv_device(struct device *d)
902{
903 return container_of(d, struct hv_device, device);
904}
905
906static inline struct hv_driver *drv_to_hv_drv(struct device_driver *d)
907{
908 return container_of(d, struct hv_driver, driver);
909}
910
K. Y. Srinivasanab101e82011-09-13 10:59:40 -0700911static inline void hv_set_drvdata(struct hv_device *dev, void *data)
912{
913 dev_set_drvdata(&dev->device, data);
914}
915
916static inline void *hv_get_drvdata(struct hv_device *dev)
917{
918 return dev_get_drvdata(&dev->device);
919}
K. Y. Srinivasan27b5b3c2011-05-12 19:34:25 -0700920
921/* Vmbus interface */
Greg Kroah-Hartman768fa212011-08-25 15:07:32 -0700922#define vmbus_driver_register(driver) \
923 __vmbus_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
924int __must_check __vmbus_driver_register(struct hv_driver *hv_driver,
925 struct module *owner,
926 const char *mod_name);
927void vmbus_driver_unregister(struct hv_driver *hv_driver);
K. Y. Srinivasan27b5b3c2011-05-12 19:34:25 -0700928
Greg Kroah-Hartmanc45cf2d2011-08-25 11:41:33 -0700929/**
930 * VMBUS_DEVICE - macro used to describe a specific hyperv vmbus device
931 *
932 * This macro is used to create a struct hv_vmbus_device_id that matches a
933 * specific device.
934 */
935#define VMBUS_DEVICE(g0, g1, g2, g3, g4, g5, g6, g7, \
936 g8, g9, ga, gb, gc, gd, ge, gf) \
937 .guid = { g0, g1, g2, g3, g4, g5, g6, g7, \
938 g8, g9, ga, gb, gc, gd, ge, gf },
939
K. Y. Srinivasanb1897022011-05-12 19:34:26 -0700940/*
K. Y. Srinivasan7fb96562013-01-23 17:42:40 -0800941 * GUID definitions of various offer types - services offered to the guest.
942 */
943
944/*
945 * Network GUID
946 * {f8615163-df3e-46c5-913f-f2d2f965ed0e}
947 */
948#define HV_NIC_GUID \
949 .guid = { \
950 0x63, 0x51, 0x61, 0xf8, 0x3e, 0xdf, 0xc5, 0x46, \
951 0x91, 0x3f, 0xf2, 0xd2, 0xf9, 0x65, 0xed, 0x0e \
952 }
953
954/*
955 * IDE GUID
956 * {32412632-86cb-44a2-9b5c-50d1417354f5}
957 */
958#define HV_IDE_GUID \
959 .guid = { \
960 0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, \
961 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5 \
962 }
963
964/*
965 * SCSI GUID
966 * {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f}
967 */
968#define HV_SCSI_GUID \
969 .guid = { \
970 0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, \
971 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f \
972 }
973
974/*
975 * Shutdown GUID
976 * {0e0b6031-5213-4934-818b-38d90ced39db}
977 */
978#define HV_SHUTDOWN_GUID \
979 .guid = { \
980 0x31, 0x60, 0x0b, 0x0e, 0x13, 0x52, 0x34, 0x49, \
981 0x81, 0x8b, 0x38, 0xd9, 0x0c, 0xed, 0x39, 0xdb \
982 }
983
984/*
985 * Time Synch GUID
986 * {9527E630-D0AE-497b-ADCE-E80AB0175CAF}
987 */
988#define HV_TS_GUID \
989 .guid = { \
990 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49, \
991 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf \
992 }
993
994/*
995 * Heartbeat GUID
996 * {57164f39-9115-4e78-ab55-382f3bd5422d}
997 */
998#define HV_HEART_BEAT_GUID \
999 .guid = { \
1000 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e, \
1001 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d \
1002 }
1003
1004/*
1005 * KVP GUID
1006 * {a9a0f4e7-5a45-4d96-b827-8a841e8c03e6}
1007 */
1008#define HV_KVP_GUID \
1009 .guid = { \
1010 0xe7, 0xf4, 0xa0, 0xa9, 0x45, 0x5a, 0x96, 0x4d, \
1011 0xb8, 0x27, 0x8a, 0x84, 0x1e, 0x8c, 0x3, 0xe6 \
1012 }
1013
1014/*
1015 * Dynamic memory GUID
1016 * {525074dc-8985-46e2-8057-a307dc18a502}
1017 */
1018#define HV_DM_GUID \
1019 .guid = { \
1020 0xdc, 0x74, 0x50, 0X52, 0x85, 0x89, 0xe2, 0x46, \
1021 0x80, 0x57, 0xa3, 0x07, 0xdc, 0x18, 0xa5, 0x02 \
1022 }
1023
1024/*
1025 * Mouse GUID
1026 * {cfa8b69e-5b4a-4cc0-b98b-8ba1a1f3f95a}
1027 */
1028#define HV_MOUSE_GUID \
1029 .guid = { \
1030 0x9e, 0xb6, 0xa8, 0xcf, 0x4a, 0x5b, 0xc0, 0x4c, \
1031 0xb9, 0x8b, 0x8b, 0xa1, 0xa1, 0xf3, 0xf9, 0x5a \
1032 }
1033
1034/*
K. Y. Srinivasan96dd86f2013-03-15 12:30:06 -07001035 * VSS (Backup/Restore) GUID
1036 */
1037#define HV_VSS_GUID \
1038 .guid = { \
1039 0x29, 0x2e, 0xfa, 0x35, 0x23, 0xea, 0x36, 0x42, \
1040 0x96, 0xae, 0x3a, 0x6e, 0xba, 0xcb, 0xa4, 0x40 \
1041 }
1042/*
Haiyang Zhang68a2d20b2013-04-29 15:05:42 -07001043 * Synthetic Video GUID
1044 * {DA0A7802-E377-4aac-8E77-0558EB1073F8}
1045 */
1046#define HV_SYNTHVID_GUID \
1047 .guid = { \
1048 0x02, 0x78, 0x0a, 0xda, 0x77, 0xe3, 0xac, 0x4a, \
1049 0x8e, 0x77, 0x05, 0x58, 0xeb, 0x10, 0x73, 0xf8 \
1050 }
1051
Haiyang Zhang68a2d20b2013-04-29 15:05:42 -07001052/*
K. Y. Srinivasan98b80d82013-05-23 12:02:33 -07001053 * Synthetic FC GUID
1054 * {2f9bcc4a-0069-4af3-b76b-6fd0be528cda}
1055 */
1056#define HV_SYNTHFC_GUID \
1057 .guid = { \
1058 0x4A, 0xCC, 0x9B, 0x2F, 0x69, 0x00, 0xF3, 0x4A, \
1059 0xB7, 0x6B, 0x6F, 0xD0, 0xBE, 0x52, 0x8C, 0xDA \
1060 }
1061
1062/*
K. Y. Srinivasan013254762014-02-16 11:34:30 -08001063 * Guest File Copy Service
1064 * {34D14BE3-DEE4-41c8-9AE7-6B174977C192}
1065 */
1066
1067#define HV_FCOPY_GUID \
1068 .guid = { \
1069 0xE3, 0x4B, 0xD1, 0x34, 0xE4, 0xDE, 0xC8, 0x41, \
1070 0x9A, 0xE7, 0x6B, 0x17, 0x49, 0x77, 0xC1, 0x92 \
1071 }
1072
1073/*
K. Y. Srinivasanb1897022011-05-12 19:34:26 -07001074 * Common header for Hyper-V ICs
1075 */
1076
1077#define ICMSGTYPE_NEGOTIATE 0
1078#define ICMSGTYPE_HEARTBEAT 1
1079#define ICMSGTYPE_KVPEXCHANGE 2
1080#define ICMSGTYPE_SHUTDOWN 3
1081#define ICMSGTYPE_TIMESYNC 4
1082#define ICMSGTYPE_VSS 5
1083
1084#define ICMSGHDRFLAG_TRANSACTION 1
1085#define ICMSGHDRFLAG_REQUEST 2
1086#define ICMSGHDRFLAG_RESPONSE 4
1087
K. Y. Srinivasanb1897022011-05-12 19:34:26 -07001088
K. Y. Srinivasana29b6432011-09-18 10:31:33 -07001089/*
1090 * While we want to handle util services as regular devices,
1091 * there is only one instance of each of these services; so
1092 * we statically allocate the service specific state.
1093 */
1094
1095struct hv_util_service {
1096 u8 *recv_buffer;
1097 void (*util_cb)(void *);
1098 int (*util_init)(struct hv_util_service *);
1099 void (*util_deinit)(void);
1100};
1101
K. Y. Srinivasanb1897022011-05-12 19:34:26 -07001102struct vmbuspipe_hdr {
1103 u32 flags;
1104 u32 msgsize;
1105} __packed;
1106
1107struct ic_version {
1108 u16 major;
1109 u16 minor;
1110} __packed;
1111
1112struct icmsg_hdr {
1113 struct ic_version icverframe;
1114 u16 icmsgtype;
1115 struct ic_version icvermsg;
1116 u16 icmsgsize;
1117 u32 status;
1118 u8 ictransaction_id;
1119 u8 icflags;
1120 u8 reserved[2];
1121} __packed;
1122
1123struct icmsg_negotiate {
1124 u16 icframe_vercnt;
1125 u16 icmsg_vercnt;
1126 u32 reserved;
1127 struct ic_version icversion_data[1]; /* any size array */
1128} __packed;
1129
1130struct shutdown_msg_data {
1131 u32 reason_code;
1132 u32 timeout_seconds;
1133 u32 flags;
1134 u8 display_message[2048];
1135} __packed;
1136
1137struct heartbeat_msg_data {
1138 u64 seq_num;
1139 u32 reserved[8];
1140} __packed;
1141
1142/* Time Sync IC defs */
1143#define ICTIMESYNCFLAG_PROBE 0
1144#define ICTIMESYNCFLAG_SYNC 1
1145#define ICTIMESYNCFLAG_SAMPLE 2
1146
1147#ifdef __x86_64__
1148#define WLTIMEDELTA 116444736000000000L /* in 100ns unit */
1149#else
1150#define WLTIMEDELTA 116444736000000000LL
1151#endif
1152
1153struct ictimesync_data {
1154 u64 parenttime;
1155 u64 childtime;
1156 u64 roundtriptime;
1157 u8 flags;
1158} __packed;
1159
K. Y. Srinivasanb1897022011-05-12 19:34:26 -07001160struct hyperv_service_callback {
1161 u8 msg_type;
1162 char *log_msg;
K. Y. Srinivasan358d2ee2011-08-25 09:48:28 -07001163 uuid_le data;
K. Y. Srinivasanb1897022011-05-12 19:34:26 -07001164 struct vmbus_channel *channel;
1165 void (*callback) (void *context);
1166};
1167
K. Y. Srinivasanc836d0a2012-05-12 13:44:58 -07001168#define MAX_SRV_VER 0x7ffffff
K. Y. Srinivasan67413352013-07-02 10:31:30 -07001169extern bool vmbus_prep_negotiate_resp(struct icmsg_hdr *,
K. Y. Srinivasanc836d0a2012-05-12 13:44:58 -07001170 struct icmsg_negotiate *, u8 *, int,
1171 int);
K. Y. Srinivasanb1897022011-05-12 19:34:26 -07001172
K. Y. Srinivasan29394372012-01-27 15:55:58 -08001173int hv_kvp_init(struct hv_util_service *);
1174void hv_kvp_deinit(void);
1175void hv_kvp_onchannelcallback(void *);
1176
K. Y. Srinivasan96dd86f2013-03-15 12:30:06 -07001177int hv_vss_init(struct hv_util_service *);
1178void hv_vss_deinit(void);
1179void hv_vss_onchannelcallback(void *);
1180
Gerd Hoffmann90eedf02014-02-24 14:17:09 +01001181extern struct resource hyperv_mmio;
K. Y. Srinivasan90f34532014-01-29 18:14:39 -08001182
K. Y. Srinivasan37f72782012-12-01 06:46:41 -08001183/*
1184 * Negotiated version with the Host.
1185 */
1186
1187extern __u32 vmbus_proto_version;
1188
K. Y. Srinivasan3f335ea2011-05-12 19:34:15 -07001189#endif /* _HYPERV_H */