1 /*- 2 * Copyright (c) 2009-2012 Microsoft Corp. 3 * Copyright (c) 2012 NetApp Inc. 4 * Copyright (c) 2012 Citrix Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice unmodified, this list of conditions, and the following 12 * disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 /** 32 * HyperV definitions for messages that are sent between instances of the 33 * Channel Management Library in separate partitions, or in some cases, 34 * back to itself. 35 */ 36 37 #ifndef __HYPERV_H__ 38 #define __HYPERV_H__ 39 40 #include <sys/param.h> 41 #include <sys/mbuf.h> 42 #include <sys/queue.h> 43 #include <sys/malloc.h> 44 #include <sys/kthread.h> 45 #include <sys/taskqueue.h> 46 #include <sys/systm.h> 47 #include <sys/lock.h> 48 #include <sys/sema.h> 49 #include <sys/smp.h> 50 #include <sys/mutex.h> 51 #include <sys/bus.h> 52 #include <vm/vm.h> 53 #include <vm/vm_param.h> 54 #include <vm/pmap.h> 55 56 #include <amd64/include/xen/synch_bitops.h> 57 #include <amd64/include/atomic.h> 58 59 typedef uint8_t hv_bool_uint8_t; 60 61 #define HV_S_OK 0x00000000 62 #define HV_E_FAIL 0x80004005 63 #define HV_ERROR_NOT_SUPPORTED 0x80070032 64 #define HV_ERROR_MACHINE_LOCKED 0x800704F7 65 66 /* 67 * VMBUS version is 32 bit, upper 16 bit for major_number and lower 68 * 16 bit for minor_number. 69 * 70 * 0.13 -- Windows Server 2008 71 * 1.1 -- Windows 7 72 * 2.4 -- Windows 8 73 * 3.0 -- Windows 8.1 74 */ 75 #define HV_VMBUS_VERSION_WS2008 ((0 << 16) | (13)) 76 #define HV_VMBUS_VERSION_WIN7 ((1 << 16) | (1)) 77 #define HV_VMBUS_VERSION_WIN8 ((2 << 16) | (4)) 78 #define HV_VMBUS_VERSION_WIN8_1 ((3 << 16) | (0)) 79 80 #define HV_VMBUS_VERSION_INVALID -1 81 82 #define HV_VMBUS_VERSION_CURRENT HV_VMBUS_VERSION_WIN8_1 83 84 /* 85 * Make maximum size of pipe payload of 16K 86 */ 87 88 #define HV_MAX_PIPE_DATA_PAYLOAD (sizeof(BYTE) * 16384) 89 90 /* 91 * Define pipe_mode values 92 */ 93 94 #define HV_VMBUS_PIPE_TYPE_BYTE 0x00000000 95 #define HV_VMBUS_PIPE_TYPE_MESSAGE 0x00000004 96 97 /* 98 * The size of the user defined data buffer for non-pipe offers 99 */ 100 101 #define HV_MAX_USER_DEFINED_BYTES 120 102 103 /* 104 * The size of the user defined data buffer for pipe offers 105 */ 106 107 #define HV_MAX_PIPE_USER_DEFINED_BYTES 116 108 109 110 #define HV_MAX_PAGE_BUFFER_COUNT 32 111 #define HV_MAX_MULTIPAGE_BUFFER_COUNT 32 112 113 #define HV_ALIGN_UP(value, align) \ 114 (((value) & (align-1)) ? \ 115 (((value) + (align-1)) & ~(align-1) ) : (value)) 116 117 #define HV_ALIGN_DOWN(value, align) ( (value) & ~(align-1) ) 118 119 #define HV_NUM_PAGES_SPANNED(addr, len) \ 120 ((HV_ALIGN_UP(addr+len, PAGE_SIZE) - \ 121 HV_ALIGN_DOWN(addr, PAGE_SIZE)) >> PAGE_SHIFT ) 122 123 typedef struct hv_guid { 124 unsigned char data[16]; 125 } __packed hv_guid; 126 127 #define HV_NIC_GUID \ 128 .data = {0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, \ 129 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E} 130 131 #define HV_IDE_GUID \ 132 .data = {0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, \ 133 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5} 134 135 #define HV_SCSI_GUID \ 136 .data = {0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, \ 137 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f} 138 139 /* 140 * At the center of the Channel Management library is 141 * the Channel Offer. This struct contains the 142 * fundamental information about an offer. 143 */ 144 145 typedef struct hv_vmbus_channel_offer { 146 hv_guid interface_type; 147 hv_guid interface_instance; 148 uint64_t interrupt_latency_in_100ns_units; 149 uint32_t interface_revision; 150 uint32_t server_context_area_size; /* in bytes */ 151 uint16_t channel_flags; 152 uint16_t mmio_megabytes; /* in bytes * 1024 * 1024 */ 153 union 154 { 155 /* 156 * Non-pipes: The user has HV_MAX_USER_DEFINED_BYTES bytes. 157 */ 158 struct { 159 uint8_t user_defined[HV_MAX_USER_DEFINED_BYTES]; 160 } __packed standard; 161 162 /* 163 * Pipes: The following structure is an integrated pipe protocol, which 164 * is implemented on top of standard user-defined data. pipe 165 * clients have HV_MAX_PIPE_USER_DEFINED_BYTES left for their 166 * own use. 167 */ 168 struct { 169 uint32_t pipe_mode; 170 uint8_t user_defined[HV_MAX_PIPE_USER_DEFINED_BYTES]; 171 } __packed pipe; 172 } u; 173 174 /* 175 * Sub_channel_index, newly added in Win8. 176 */ 177 uint16_t sub_channel_index; 178 uint16_t padding; 179 180 } __packed hv_vmbus_channel_offer; 181 182 typedef uint32_t hv_gpadl_handle; 183 184 typedef struct { 185 uint16_t type; 186 uint16_t data_offset8; 187 uint16_t length8; 188 uint16_t flags; 189 uint64_t transaction_id; 190 } __packed hv_vm_packet_descriptor; 191 192 typedef uint32_t hv_previous_packet_offset; 193 194 typedef struct { 195 hv_previous_packet_offset previous_packet_start_offset; 196 hv_vm_packet_descriptor descriptor; 197 } __packed hv_vm_packet_header; 198 199 typedef struct { 200 uint32_t byte_count; 201 uint32_t byte_offset; 202 } __packed hv_vm_transfer_page; 203 204 typedef struct { 205 hv_vm_packet_descriptor d; 206 uint16_t transfer_page_set_id; 207 hv_bool_uint8_t sender_owns_set; 208 uint8_t reserved; 209 uint32_t range_count; 210 hv_vm_transfer_page ranges[1]; 211 } __packed hv_vm_transfer_page_packet_header; 212 213 typedef struct { 214 hv_vm_packet_descriptor d; 215 uint32_t gpadl; 216 uint32_t reserved; 217 } __packed hv_vm_gpadl_packet_header; 218 219 typedef struct { 220 hv_vm_packet_descriptor d; 221 uint32_t gpadl; 222 uint16_t transfer_page_set_id; 223 uint16_t reserved; 224 } __packed hv_vm_add_remove_transfer_page_set; 225 226 /* 227 * This structure defines a range in guest 228 * physical space that can be made 229 * to look virtually contiguous. 230 */ 231 232 typedef struct { 233 uint32_t byte_count; 234 uint32_t byte_offset; 235 uint64_t pfn_array[0]; 236 } __packed hv_gpa_range; 237 238 /* 239 * This is the format for an Establish Gpadl packet, which contains a handle 240 * by which this GPADL will be known and a set of GPA ranges associated with 241 * it. This can be converted to a MDL by the guest OS. If there are multiple 242 * GPA ranges, then the resulting MDL will be "chained," representing multiple 243 * VA ranges. 244 */ 245 246 typedef struct { 247 hv_vm_packet_descriptor d; 248 uint32_t gpadl; 249 uint32_t range_count; 250 hv_gpa_range range[1]; 251 } __packed hv_vm_establish_gpadl; 252 253 /* 254 * This is the format for a Teardown Gpadl packet, which indicates that the 255 * GPADL handle in the Establish Gpadl packet will never be referenced again. 256 */ 257 258 typedef struct { 259 hv_vm_packet_descriptor d; 260 uint32_t gpadl; 261 /* for alignment to a 8-byte boundary */ 262 uint32_t reserved; 263 } __packed hv_vm_teardown_gpadl; 264 265 /* 266 * This is the format for a GPA-Direct packet, which contains a set of GPA 267 * ranges, in addition to commands and/or data. 268 */ 269 270 typedef struct { 271 hv_vm_packet_descriptor d; 272 uint32_t reserved; 273 uint32_t range_count; 274 hv_gpa_range range[1]; 275 } __packed hv_vm_data_gpa_direct; 276 277 /* 278 * This is the format for a Additional data Packet. 279 */ 280 typedef struct { 281 hv_vm_packet_descriptor d; 282 uint64_t total_bytes; 283 uint32_t byte_offset; 284 uint32_t byte_count; 285 uint8_t data[1]; 286 } __packed hv_vm_additional_data; 287 288 typedef union { 289 hv_vm_packet_descriptor simple_header; 290 hv_vm_transfer_page_packet_header transfer_page_header; 291 hv_vm_gpadl_packet_header gpadl_header; 292 hv_vm_add_remove_transfer_page_set add_remove_transfer_page_header; 293 hv_vm_establish_gpadl establish_gpadl_header; 294 hv_vm_teardown_gpadl teardown_gpadl_header; 295 hv_vm_data_gpa_direct data_gpa_direct_header; 296 } __packed hv_vm_packet_largest_possible_header; 297 298 typedef enum { 299 HV_VMBUS_PACKET_TYPE_INVALID = 0x0, 300 HV_VMBUS_PACKET_TYPES_SYNCH = 0x1, 301 HV_VMBUS_PACKET_TYPE_ADD_TRANSFER_PAGE_SET = 0x2, 302 HV_VMBUS_PACKET_TYPE_REMOVE_TRANSFER_PAGE_SET = 0x3, 303 HV_VMBUS_PACKET_TYPE_ESTABLISH_GPADL = 0x4, 304 HV_VMBUS_PACKET_TYPE_TEAR_DOWN_GPADL = 0x5, 305 HV_VMBUS_PACKET_TYPE_DATA_IN_BAND = 0x6, 306 HV_VMBUS_PACKET_TYPE_DATA_USING_TRANSFER_PAGES = 0x7, 307 HV_VMBUS_PACKET_TYPE_DATA_USING_GPADL = 0x8, 308 HV_VMBUS_PACKET_TYPE_DATA_USING_GPA_DIRECT = 0x9, 309 HV_VMBUS_PACKET_TYPE_CANCEL_REQUEST = 0xa, 310 HV_VMBUS_PACKET_TYPE_COMPLETION = 0xb, 311 HV_VMBUS_PACKET_TYPE_DATA_USING_ADDITIONAL_PACKETS = 0xc, 312 HV_VMBUS_PACKET_TYPE_ADDITIONAL_DATA = 0xd 313 } hv_vmbus_packet_type; 314 315 #define HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED 1 316 317 /* 318 * Version 1 messages 319 */ 320 typedef enum { 321 HV_CHANNEL_MESSAGE_INVALID = 0, 322 HV_CHANNEL_MESSAGE_OFFER_CHANNEL = 1, 323 HV_CHANNEL_MESSAGE_RESCIND_CHANNEL_OFFER = 2, 324 HV_CHANNEL_MESSAGE_REQUEST_OFFERS = 3, 325 HV_CHANNEL_MESSAGE_ALL_OFFERS_DELIVERED = 4, 326 HV_CHANNEL_MESSAGE_OPEN_CHANNEL = 5, 327 HV_CHANNEL_MESSAGE_OPEN_CHANNEL_RESULT = 6, 328 HV_CHANNEL_MESSAGE_CLOSE_CHANNEL = 7, 329 HV_CHANNEL_MESSAGEL_GPADL_HEADER = 8, 330 HV_CHANNEL_MESSAGE_GPADL_BODY = 9, 331 HV_CHANNEL_MESSAGE_GPADL_CREATED = 10, 332 HV_CHANNEL_MESSAGE_GPADL_TEARDOWN = 11, 333 HV_CHANNEL_MESSAGE_GPADL_TORNDOWN = 12, 334 HV_CHANNEL_MESSAGE_REL_ID_RELEASED = 13, 335 HV_CHANNEL_MESSAGE_INITIATED_CONTACT = 14, 336 HV_CHANNEL_MESSAGE_VERSION_RESPONSE = 15, 337 HV_CHANNEL_MESSAGE_UNLOAD = 16, 338 HV_CHANNEL_MESSAGE_COUNT 339 } hv_vmbus_channel_msg_type; 340 341 typedef struct { 342 hv_vmbus_channel_msg_type message_type; 343 uint32_t padding; 344 } __packed hv_vmbus_channel_msg_header; 345 346 /* 347 * Query VMBus Version parameters 348 */ 349 typedef struct { 350 hv_vmbus_channel_msg_header header; 351 uint32_t version; 352 } __packed hv_vmbus_channel_query_vmbus_version; 353 354 /* 355 * VMBus Version Supported parameters 356 */ 357 typedef struct { 358 hv_vmbus_channel_msg_header header; 359 hv_bool_uint8_t version_supported; 360 } __packed hv_vmbus_channel_version_supported; 361 362 /* 363 * Channel Offer parameters 364 */ 365 typedef struct { 366 hv_vmbus_channel_msg_header header; 367 hv_vmbus_channel_offer offer; 368 uint32_t child_rel_id; 369 uint8_t monitor_id; 370 /* 371 * This field has been split into a bit field on Win7 372 * and higher. 373 */ 374 uint8_t monitor_allocated:1; 375 uint8_t reserved:7; 376 /* 377 * Following fields were added in win7 and higher. 378 * Make sure to check the version before accessing these fields. 379 * 380 * If "is_dedicated_interrupt" is set, we must not set the 381 * associated bit in the channel bitmap while sending the 382 * interrupt to the host. 383 * 384 * connection_id is used in signaling the host. 385 */ 386 uint16_t is_dedicated_interrupt:1; 387 uint16_t reserved1:15; 388 uint32_t connection_id; 389 } __packed hv_vmbus_channel_offer_channel; 390 391 /* 392 * Rescind Offer parameters 393 */ 394 typedef struct 395 { 396 hv_vmbus_channel_msg_header header; 397 uint32_t child_rel_id; 398 } __packed hv_vmbus_channel_rescind_offer; 399 400 401 /* 402 * Request Offer -- no parameters, SynIC message contains the partition ID 403 * 404 * Set Snoop -- no parameters, SynIC message contains the partition ID 405 * 406 * Clear Snoop -- no parameters, SynIC message contains the partition ID 407 * 408 * All Offers Delivered -- no parameters, SynIC message contains the 409 * partition ID 410 * 411 * Flush Client -- no parameters, SynIC message contains the partition ID 412 */ 413 414 415 /* 416 * Open Channel parameters 417 */ 418 typedef struct 419 { 420 hv_vmbus_channel_msg_header header; 421 422 /* 423 * Identifies the specific VMBus channel that is being opened. 424 */ 425 uint32_t child_rel_id; 426 427 /* 428 * ID making a particular open request at a channel offer unique. 429 */ 430 uint32_t open_id; 431 432 /* 433 * GPADL for the channel's ring buffer. 434 */ 435 hv_gpadl_handle ring_buffer_gpadl_handle; 436 437 /* 438 * Before win8, all incoming channel interrupts are only 439 * delivered on cpu 0. Setting this value to 0 would 440 * preserve the earlier behavior. 441 */ 442 uint32_t target_vcpu; 443 444 /* 445 * The upstream ring buffer begins at offset zero in the memory described 446 * by ring_buffer_gpadl_handle. The downstream ring buffer follows it at 447 * this offset (in pages). 448 */ 449 uint32_t downstream_ring_buffer_page_offset; 450 451 /* 452 * User-specific data to be passed along to the server endpoint. 453 */ 454 uint8_t user_data[HV_MAX_USER_DEFINED_BYTES]; 455 456 } __packed hv_vmbus_channel_open_channel; 457 458 typedef uint32_t hv_nt_status; 459 460 /* 461 * Open Channel Result parameters 462 */ 463 typedef struct 464 { 465 hv_vmbus_channel_msg_header header; 466 uint32_t child_rel_id; 467 uint32_t open_id; 468 hv_nt_status status; 469 } __packed hv_vmbus_channel_open_result; 470 471 /* 472 * Close channel parameters 473 */ 474 typedef struct 475 { 476 hv_vmbus_channel_msg_header header; 477 uint32_t child_rel_id; 478 } __packed hv_vmbus_channel_close_channel; 479 480 /* 481 * Channel Message GPADL 482 */ 483 #define HV_GPADL_TYPE_RING_BUFFER 1 484 #define HV_GPADL_TYPE_SERVER_SAVE_AREA 2 485 #define HV_GPADL_TYPE_TRANSACTION 8 486 487 /* 488 * The number of PFNs in a GPADL message is defined by the number of pages 489 * that would be spanned by byte_count and byte_offset. If the implied number 490 * of PFNs won't fit in this packet, there will be a follow-up packet that 491 * contains more 492 */ 493 494 typedef struct { 495 hv_vmbus_channel_msg_header header; 496 uint32_t child_rel_id; 497 uint32_t gpadl; 498 uint16_t range_buf_len; 499 uint16_t range_count; 500 hv_gpa_range range[0]; 501 } __packed hv_vmbus_channel_gpadl_header; 502 503 /* 504 * This is the follow-up packet that contains more PFNs 505 */ 506 typedef struct { 507 hv_vmbus_channel_msg_header header; 508 uint32_t message_number; 509 uint32_t gpadl; 510 uint64_t pfn[0]; 511 } __packed hv_vmbus_channel_gpadl_body; 512 513 typedef struct { 514 hv_vmbus_channel_msg_header header; 515 uint32_t child_rel_id; 516 uint32_t gpadl; 517 uint32_t creation_status; 518 } __packed hv_vmbus_channel_gpadl_created; 519 520 typedef struct { 521 hv_vmbus_channel_msg_header header; 522 uint32_t child_rel_id; 523 uint32_t gpadl; 524 } __packed hv_vmbus_channel_gpadl_teardown; 525 526 typedef struct { 527 hv_vmbus_channel_msg_header header; 528 uint32_t gpadl; 529 } __packed hv_vmbus_channel_gpadl_torndown; 530 531 typedef struct { 532 hv_vmbus_channel_msg_header header; 533 uint32_t child_rel_id; 534 } __packed hv_vmbus_channel_relid_released; 535 536 typedef struct { 537 hv_vmbus_channel_msg_header header; 538 uint32_t vmbus_version_requested; 539 uint32_t padding2; 540 uint64_t interrupt_page; 541 uint64_t monitor_page_1; 542 uint64_t monitor_page_2; 543 } __packed hv_vmbus_channel_initiate_contact; 544 545 typedef struct { 546 hv_vmbus_channel_msg_header header; 547 hv_bool_uint8_t version_supported; 548 } __packed hv_vmbus_channel_version_response; 549 550 typedef hv_vmbus_channel_msg_header hv_vmbus_channel_unload; 551 552 #define HW_MACADDR_LEN 6 553 554 /* 555 * Fixme: Added to quiet "typeof" errors involving hv_vmbus.h when 556 * the including C file was compiled with "-std=c99". 557 */ 558 #ifndef typeof 559 #define typeof __typeof 560 #endif 561 562 #ifndef NULL 563 #define NULL (void *)0 564 #endif 565 566 typedef void *hv_vmbus_handle; 567 568 #ifndef CONTAINING_RECORD 569 #define CONTAINING_RECORD(address, type, field) ((type *)( \ 570 (uint8_t *)(address) - \ 571 (uint8_t *)(&((type *)0)->field))) 572 #endif /* CONTAINING_RECORD */ 573 574 575 #define container_of(ptr, type, member) ({ \ 576 __typeof__( ((type *)0)->member ) *__mptr = (ptr); \ 577 (type *)( (char *)__mptr - offsetof(type,member) );}) 578 579 enum { 580 HV_VMBUS_IVAR_TYPE, 581 HV_VMBUS_IVAR_INSTANCE, 582 HV_VMBUS_IVAR_NODE, 583 HV_VMBUS_IVAR_DEVCTX 584 }; 585 586 #define HV_VMBUS_ACCESSOR(var, ivar, type) \ 587 __BUS_ACCESSOR(vmbus, var, HV_VMBUS, ivar, type) 588 589 HV_VMBUS_ACCESSOR(type, TYPE, const char *) 590 HV_VMBUS_ACCESSOR(devctx, DEVCTX, struct hv_device *) 591 592 593 /* 594 * Common defines for Hyper-V ICs 595 */ 596 #define HV_ICMSGTYPE_NEGOTIATE 0 597 #define HV_ICMSGTYPE_HEARTBEAT 1 598 #define HV_ICMSGTYPE_KVPEXCHANGE 2 599 #define HV_ICMSGTYPE_SHUTDOWN 3 600 #define HV_ICMSGTYPE_TIMESYNC 4 601 #define HV_ICMSGTYPE_VSS 5 602 603 #define HV_ICMSGHDRFLAG_TRANSACTION 1 604 #define HV_ICMSGHDRFLAG_REQUEST 2 605 #define HV_ICMSGHDRFLAG_RESPONSE 4 606 607 typedef struct hv_vmbus_pipe_hdr { 608 uint32_t flags; 609 uint32_t msgsize; 610 } __packed hv_vmbus_pipe_hdr; 611 612 typedef struct hv_vmbus_ic_version { 613 uint16_t major; 614 uint16_t minor; 615 } __packed hv_vmbus_ic_version; 616 617 typedef struct hv_vmbus_icmsg_hdr { 618 hv_vmbus_ic_version icverframe; 619 uint16_t icmsgtype; 620 hv_vmbus_ic_version icvermsg; 621 uint16_t icmsgsize; 622 uint32_t status; 623 uint8_t ictransaction_id; 624 uint8_t icflags; 625 uint8_t reserved[2]; 626 } __packed hv_vmbus_icmsg_hdr; 627 628 typedef struct hv_vmbus_icmsg_negotiate { 629 uint16_t icframe_vercnt; 630 uint16_t icmsg_vercnt; 631 uint32_t reserved; 632 hv_vmbus_ic_version icversion_data[1]; /* any size array */ 633 } __packed hv_vmbus_icmsg_negotiate; 634 635 typedef struct hv_vmbus_shutdown_msg_data { 636 uint32_t reason_code; 637 uint32_t timeout_seconds; 638 uint32_t flags; 639 uint8_t display_message[2048]; 640 } __packed hv_vmbus_shutdown_msg_data; 641 642 typedef struct hv_vmbus_heartbeat_msg_data { 643 uint64_t seq_num; 644 uint32_t reserved[8]; 645 } __packed hv_vmbus_heartbeat_msg_data; 646 647 typedef struct { 648 /* 649 * offset in bytes from the start of ring data below 650 */ 651 volatile uint32_t write_index; 652 /* 653 * offset in bytes from the start of ring data below 654 */ 655 volatile uint32_t read_index; 656 /* 657 * NOTE: The interrupt_mask field is used only for channels, but 658 * vmbus connection also uses this data structure 659 */ 660 volatile uint32_t interrupt_mask; 661 /* pad it to PAGE_SIZE so that data starts on a page */ 662 uint8_t reserved[4084]; 663 664 /* 665 * WARNING: Ring data starts here + ring_data_start_offset 666 * !!! DO NOT place any fields below this !!! 667 */ 668 uint8_t buffer[0]; /* doubles as interrupt mask */ 669 } __packed hv_vmbus_ring_buffer; 670 671 typedef struct { 672 int length; 673 int offset; 674 uint64_t pfn; 675 } __packed hv_vmbus_page_buffer; 676 677 typedef struct { 678 int length; 679 int offset; 680 uint64_t pfn_array[HV_MAX_MULTIPAGE_BUFFER_COUNT]; 681 } __packed hv_vmbus_multipage_buffer; 682 683 typedef struct { 684 hv_vmbus_ring_buffer* ring_buffer; 685 uint32_t ring_size; /* Include the shared header */ 686 struct mtx ring_lock; 687 uint32_t ring_data_size; /* ring_size */ 688 uint32_t ring_data_start_offset; 689 } hv_vmbus_ring_buffer_info; 690 691 typedef void (*hv_vmbus_pfn_channel_callback)(void *context); 692 typedef void (*hv_vmbus_sc_creation_callback)(void *context); 693 694 typedef enum { 695 HV_CHANNEL_OFFER_STATE, 696 HV_CHANNEL_OPENING_STATE, 697 HV_CHANNEL_OPEN_STATE, 698 HV_CHANNEL_OPENED_STATE, 699 HV_CHANNEL_CLOSING_NONDESTRUCTIVE_STATE, 700 } hv_vmbus_channel_state; 701 702 /* 703 * Connection identifier type 704 */ 705 typedef union { 706 uint32_t as_uint32_t; 707 struct { 708 uint32_t id:24; 709 uint32_t reserved:8; 710 } u; 711 712 } __packed hv_vmbus_connection_id; 713 714 /* 715 * Definition of the hv_vmbus_signal_event hypercall input structure 716 */ 717 typedef struct { 718 hv_vmbus_connection_id connection_id; 719 uint16_t flag_number; 720 uint16_t rsvd_z; 721 } __packed hv_vmbus_input_signal_event; 722 723 typedef struct { 724 uint64_t align8; 725 hv_vmbus_input_signal_event event; 726 } __packed hv_vmbus_input_signal_event_buffer; 727 728 typedef struct hv_vmbus_channel { 729 TAILQ_ENTRY(hv_vmbus_channel) list_entry; 730 struct hv_device* device; 731 hv_vmbus_channel_state state; 732 hv_vmbus_channel_offer_channel offer_msg; 733 /* 734 * These are based on the offer_msg.monitor_id. 735 * Save it here for easy access. 736 */ 737 uint8_t monitor_group; 738 uint8_t monitor_bit; 739 740 uint32_t ring_buffer_gpadl_handle; 741 /* 742 * Allocated memory for ring buffer 743 */ 744 void* ring_buffer_pages; 745 unsigned long ring_buffer_size; 746 uint32_t ring_buffer_page_count; 747 /* 748 * send to parent 749 */ 750 hv_vmbus_ring_buffer_info outbound; 751 /* 752 * receive from parent 753 */ 754 hv_vmbus_ring_buffer_info inbound; 755 756 struct mtx inbound_lock; 757 758 struct taskqueue * rxq; 759 struct task channel_task; 760 hv_vmbus_pfn_channel_callback on_channel_callback; 761 void* channel_callback_context; 762 763 /* 764 * If batched_reading is set to "true", mask the interrupt 765 * and read until the channel is empty. 766 * If batched_reading is set to "false", the channel is not 767 * going to perform batched reading. 768 * 769 * Batched reading is enabled by default; specific 770 * drivers that don't want this behavior can turn it off. 771 */ 772 boolean_t batched_reading; 773 774 boolean_t is_dedicated_interrupt; 775 776 /* 777 * Used as an input param for HV_CALL_SIGNAL_EVENT hypercall. 778 */ 779 hv_vmbus_input_signal_event_buffer signal_event_buffer; 780 /* 781 * 8-bytes aligned of the buffer above 782 */ 783 hv_vmbus_input_signal_event *signal_event_param; 784 785 /* 786 * From Win8, this field specifies the target virtual process 787 * on which to deliver the interupt from the host to guest. 788 * Before Win8, all channel interrupts would only be 789 * delivered on cpu 0. Setting this value to 0 would preserve 790 * the earlier behavior. 791 */ 792 uint32_t target_vcpu; 793 /* The corresponding CPUID in the guest */ 794 uint32_t target_cpu; 795 796 /* 797 * Support for multi-channels. 798 * The initial offer is considered the primary channel and this 799 * offer message will indicate if the host supports multi-channels. 800 * The guest is free to ask for multi-channels to be offerred and can 801 * open these multi-channels as a normal "primary" channel. However, 802 * all multi-channels will have the same type and instance guids as the 803 * primary channel. Requests sent on a given channel will result in a 804 * response on the same channel. 805 */ 806 807 /* 808 * Multi-channel creation callback. This callback will be called in 809 * process context when a Multi-channel offer is received from the host. 810 * The guest can open the Multi-channel in the context of this callback. 811 */ 812 hv_vmbus_sc_creation_callback sc_creation_callback; 813 814 struct mtx sc_lock; 815 816 /* 817 * Link list of all the multi-channels if this is a primary channel 818 */ 819 TAILQ_HEAD(, hv_vmbus_channel) sc_list_anchor; 820 TAILQ_ENTRY(hv_vmbus_channel) sc_list_entry; 821 822 /* 823 * The primary channel this sub-channle belongs to. 824 * This will be NULL for the primary channel. 825 */ 826 struct hv_vmbus_channel *primary_channel; 827 /* 828 * Support per channel state for use by vmbus drivers. 829 */ 830 void *per_channel_state; 831 } hv_vmbus_channel; 832 833 static inline void 834 hv_set_channel_read_state(hv_vmbus_channel* channel, boolean_t state) 835 { 836 channel->batched_reading = state; 837 } 838 839 typedef struct hv_device { 840 hv_guid class_id; 841 hv_guid device_id; 842 device_t device; 843 hv_vmbus_channel* channel; 844 } hv_device; 845 846 847 848 int hv_vmbus_channel_recv_packet( 849 hv_vmbus_channel* channel, 850 void* buffer, 851 uint32_t buffer_len, 852 uint32_t* buffer_actual_len, 853 uint64_t* request_id); 854 855 int hv_vmbus_channel_recv_packet_raw( 856 hv_vmbus_channel* channel, 857 void* buffer, 858 uint32_t buffer_len, 859 uint32_t* buffer_actual_len, 860 uint64_t* request_id); 861 862 int hv_vmbus_channel_open( 863 hv_vmbus_channel* channel, 864 uint32_t send_ring_buffer_size, 865 uint32_t recv_ring_buffer_size, 866 void* user_data, 867 uint32_t user_data_len, 868 hv_vmbus_pfn_channel_callback 869 pfn_on_channel_callback, 870 void* context); 871 872 void hv_vmbus_channel_close(hv_vmbus_channel *channel); 873 874 int hv_vmbus_channel_send_packet( 875 hv_vmbus_channel* channel, 876 void* buffer, 877 uint32_t buffer_len, 878 uint64_t request_id, 879 hv_vmbus_packet_type type, 880 uint32_t flags); 881 882 int hv_vmbus_channel_send_packet_pagebuffer( 883 hv_vmbus_channel* channel, 884 hv_vmbus_page_buffer page_buffers[], 885 uint32_t page_count, 886 void* buffer, 887 uint32_t buffer_len, 888 uint64_t request_id); 889 890 int hv_vmbus_channel_send_packet_multipagebuffer( 891 hv_vmbus_channel* channel, 892 hv_vmbus_multipage_buffer* multi_page_buffer, 893 void* buffer, 894 uint32_t buffer_len, 895 uint64_t request_id); 896 897 int hv_vmbus_channel_establish_gpadl( 898 hv_vmbus_channel* channel, 899 /* must be phys and virt contiguous */ 900 void* contig_buffer, 901 /* page-size multiple */ 902 uint32_t size, 903 uint32_t* gpadl_handle); 904 905 int hv_vmbus_channel_teardown_gpdal( 906 hv_vmbus_channel* channel, 907 uint32_t gpadl_handle); 908 909 struct hv_vmbus_channel* vmbus_select_outgoing_channel(struct hv_vmbus_channel *promary); 910 911 /** 912 * @brief Get physical address from virtual 913 */ 914 static inline unsigned long 915 hv_get_phys_addr(void *virt) 916 { 917 unsigned long ret; 918 ret = (vtophys(virt) | ((vm_offset_t) virt & PAGE_MASK)); 919 return (ret); 920 } 921 922 extern uint32_t hv_vmbus_protocal_version; 923 #endif /* __HYPERV_H__ */ 924