1 /* 2 * 3 * Copyright (c) 2011, Microsoft Corporation. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms and conditions of the GNU General Public License, 7 * version 2, as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple 16 * Place - Suite 330, Boston, MA 02111-1307 USA. 17 * 18 * Authors: 19 * Haiyang Zhang <haiyangz@microsoft.com> 20 * Hank Janssen <hjanssen@microsoft.com> 21 * K. Y. Srinivasan <kys@microsoft.com> 22 * 23 */ 24 25 #ifndef _HYPERV_VMBUS_H 26 #define _HYPERV_VMBUS_H 27 28 #include <linux/list.h> 29 #include <asm/sync_bitops.h> 30 #include <linux/atomic.h> 31 #include <linux/hyperv.h> 32 33 /* 34 * The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent 35 * is set by CPUID(HVCPUID_VERSION_FEATURES). 36 */ 37 enum hv_cpuid_function { 38 HVCPUID_VERSION_FEATURES = 0x00000001, 39 HVCPUID_VENDOR_MAXFUNCTION = 0x40000000, 40 HVCPUID_INTERFACE = 0x40000001, 41 42 /* 43 * The remaining functions depend on the value of 44 * HVCPUID_INTERFACE 45 */ 46 HVCPUID_VERSION = 0x40000002, 47 HVCPUID_FEATURES = 0x40000003, 48 HVCPUID_ENLIGHTENMENT_INFO = 0x40000004, 49 HVCPUID_IMPLEMENTATION_LIMITS = 0x40000005, 50 }; 51 52 #define HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE 0x400 53 54 #define HV_X64_MSR_CRASH_P0 0x40000100 55 #define HV_X64_MSR_CRASH_P1 0x40000101 56 #define HV_X64_MSR_CRASH_P2 0x40000102 57 #define HV_X64_MSR_CRASH_P3 0x40000103 58 #define HV_X64_MSR_CRASH_P4 0x40000104 59 #define HV_X64_MSR_CRASH_CTL 0x40000105 60 61 #define HV_CRASH_CTL_CRASH_NOTIFY (1ULL << 63) 62 63 /* Define version of the synthetic interrupt controller. */ 64 #define HV_SYNIC_VERSION (1) 65 66 /* Define synthetic interrupt controller message constants. */ 67 #define HV_MESSAGE_SIZE (256) 68 #define HV_MESSAGE_PAYLOAD_BYTE_COUNT (240) 69 #define HV_MESSAGE_PAYLOAD_QWORD_COUNT (30) 70 #define HV_ANY_VP (0xFFFFFFFF) 71 72 /* Define synthetic interrupt controller flag constants. */ 73 #define HV_EVENT_FLAGS_COUNT (256 * 8) 74 #define HV_EVENT_FLAGS_BYTE_COUNT (256) 75 #define HV_EVENT_FLAGS_DWORD_COUNT (256 / sizeof(u32)) 76 77 /* Define hypervisor message types. */ 78 enum hv_message_type { 79 HVMSG_NONE = 0x00000000, 80 81 /* Memory access messages. */ 82 HVMSG_UNMAPPED_GPA = 0x80000000, 83 HVMSG_GPA_INTERCEPT = 0x80000001, 84 85 /* Timer notification messages. */ 86 HVMSG_TIMER_EXPIRED = 0x80000010, 87 88 /* Error messages. */ 89 HVMSG_INVALID_VP_REGISTER_VALUE = 0x80000020, 90 HVMSG_UNRECOVERABLE_EXCEPTION = 0x80000021, 91 HVMSG_UNSUPPORTED_FEATURE = 0x80000022, 92 93 /* Trace buffer complete messages. */ 94 HVMSG_EVENTLOG_BUFFERCOMPLETE = 0x80000040, 95 96 /* Platform-specific processor intercept messages. */ 97 HVMSG_X64_IOPORT_INTERCEPT = 0x80010000, 98 HVMSG_X64_MSR_INTERCEPT = 0x80010001, 99 HVMSG_X64_CPUID_INTERCEPT = 0x80010002, 100 HVMSG_X64_EXCEPTION_INTERCEPT = 0x80010003, 101 HVMSG_X64_APIC_EOI = 0x80010004, 102 HVMSG_X64_LEGACY_FP_ERROR = 0x80010005 103 }; 104 105 #define HV_SYNIC_STIMER_COUNT (4) 106 107 /* Define invalid partition identifier. */ 108 #define HV_PARTITION_ID_INVALID ((u64)0x0) 109 110 /* Define port identifier type. */ 111 union hv_port_id { 112 u32 asu32; 113 struct { 114 u32 id:24; 115 u32 reserved:8; 116 } u ; 117 }; 118 119 /* Define port type. */ 120 enum hv_port_type { 121 HVPORT_MSG = 1, 122 HVPORT_EVENT = 2, 123 HVPORT_MONITOR = 3 124 }; 125 126 /* Define port information structure. */ 127 struct hv_port_info { 128 enum hv_port_type port_type; 129 u32 padding; 130 union { 131 struct { 132 u32 target_sint; 133 u32 target_vp; 134 u64 rsvdz; 135 } message_port_info; 136 struct { 137 u32 target_sint; 138 u32 target_vp; 139 u16 base_flag_number; 140 u16 flag_count; 141 u32 rsvdz; 142 } event_port_info; 143 struct { 144 u64 monitor_address; 145 u64 rsvdz; 146 } monitor_port_info; 147 }; 148 }; 149 150 struct hv_connection_info { 151 enum hv_port_type port_type; 152 u32 padding; 153 union { 154 struct { 155 u64 rsvdz; 156 } message_connection_info; 157 struct { 158 u64 rsvdz; 159 } event_connection_info; 160 struct { 161 u64 monitor_address; 162 } monitor_connection_info; 163 }; 164 }; 165 166 /* Define synthetic interrupt controller message flags. */ 167 union hv_message_flags { 168 u8 asu8; 169 struct { 170 u8 msg_pending:1; 171 u8 reserved:7; 172 }; 173 }; 174 175 /* Define synthetic interrupt controller message header. */ 176 struct hv_message_header { 177 enum hv_message_type message_type; 178 u8 payload_size; 179 union hv_message_flags message_flags; 180 u8 reserved[2]; 181 union { 182 u64 sender; 183 union hv_port_id port; 184 }; 185 }; 186 187 /* 188 * Timer configuration register. 189 */ 190 union hv_timer_config { 191 u64 as_uint64; 192 struct { 193 u64 enable:1; 194 u64 periodic:1; 195 u64 lazy:1; 196 u64 auto_enable:1; 197 u64 reserved_z0:12; 198 u64 sintx:4; 199 u64 reserved_z1:44; 200 }; 201 }; 202 203 204 /* Define timer message payload structure. */ 205 struct hv_timer_message_payload { 206 u32 timer_index; 207 u32 reserved; 208 u64 expiration_time; /* When the timer expired */ 209 u64 delivery_time; /* When the message was delivered */ 210 }; 211 212 /* Define synthetic interrupt controller message format. */ 213 struct hv_message { 214 struct hv_message_header header; 215 union { 216 u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT]; 217 } u ; 218 }; 219 220 /* Define the number of message buffers associated with each port. */ 221 #define HV_PORT_MESSAGE_BUFFER_COUNT (16) 222 223 /* Define the synthetic interrupt message page layout. */ 224 struct hv_message_page { 225 struct hv_message sint_message[HV_SYNIC_SINT_COUNT]; 226 }; 227 228 /* Define the synthetic interrupt controller event flags format. */ 229 union hv_synic_event_flags { 230 u8 flags8[HV_EVENT_FLAGS_BYTE_COUNT]; 231 u32 flags32[HV_EVENT_FLAGS_DWORD_COUNT]; 232 }; 233 234 /* Define the synthetic interrupt flags page layout. */ 235 struct hv_synic_event_flags_page { 236 union hv_synic_event_flags sintevent_flags[HV_SYNIC_SINT_COUNT]; 237 }; 238 239 /* Define SynIC control register. */ 240 union hv_synic_scontrol { 241 u64 as_uint64; 242 struct { 243 u64 enable:1; 244 u64 reserved:63; 245 }; 246 }; 247 248 /* Define synthetic interrupt source. */ 249 union hv_synic_sint { 250 u64 as_uint64; 251 struct { 252 u64 vector:8; 253 u64 reserved1:8; 254 u64 masked:1; 255 u64 auto_eoi:1; 256 u64 reserved2:46; 257 }; 258 }; 259 260 /* Define the format of the SIMP register */ 261 union hv_synic_simp { 262 u64 as_uint64; 263 struct { 264 u64 simp_enabled:1; 265 u64 preserved:11; 266 u64 base_simp_gpa:52; 267 }; 268 }; 269 270 /* Define the format of the SIEFP register */ 271 union hv_synic_siefp { 272 u64 as_uint64; 273 struct { 274 u64 siefp_enabled:1; 275 u64 preserved:11; 276 u64 base_siefp_gpa:52; 277 }; 278 }; 279 280 /* Definitions for the monitored notification facility */ 281 union hv_monitor_trigger_group { 282 u64 as_uint64; 283 struct { 284 u32 pending; 285 u32 armed; 286 }; 287 }; 288 289 struct hv_monitor_parameter { 290 union hv_connection_id connectionid; 291 u16 flagnumber; 292 u16 rsvdz; 293 }; 294 295 union hv_monitor_trigger_state { 296 u32 asu32; 297 298 struct { 299 u32 group_enable:4; 300 u32 rsvdz:28; 301 }; 302 }; 303 304 /* struct hv_monitor_page Layout */ 305 /* ------------------------------------------------------ */ 306 /* | 0 | TriggerState (4 bytes) | Rsvd1 (4 bytes) | */ 307 /* | 8 | TriggerGroup[0] | */ 308 /* | 10 | TriggerGroup[1] | */ 309 /* | 18 | TriggerGroup[2] | */ 310 /* | 20 | TriggerGroup[3] | */ 311 /* | 28 | Rsvd2[0] | */ 312 /* | 30 | Rsvd2[1] | */ 313 /* | 38 | Rsvd2[2] | */ 314 /* | 40 | NextCheckTime[0][0] | NextCheckTime[0][1] | */ 315 /* | ... | */ 316 /* | 240 | Latency[0][0..3] | */ 317 /* | 340 | Rsvz3[0] | */ 318 /* | 440 | Parameter[0][0] | */ 319 /* | 448 | Parameter[0][1] | */ 320 /* | ... | */ 321 /* | 840 | Rsvd4[0] | */ 322 /* ------------------------------------------------------ */ 323 struct hv_monitor_page { 324 union hv_monitor_trigger_state trigger_state; 325 u32 rsvdz1; 326 327 union hv_monitor_trigger_group trigger_group[4]; 328 u64 rsvdz2[3]; 329 330 s32 next_checktime[4][32]; 331 332 u16 latency[4][32]; 333 u64 rsvdz3[32]; 334 335 struct hv_monitor_parameter parameter[4][32]; 336 337 u8 rsvdz4[1984]; 338 }; 339 340 /* Declare the various hypercall operations. */ 341 enum hv_call_code { 342 HVCALL_POST_MESSAGE = 0x005c, 343 HVCALL_SIGNAL_EVENT = 0x005d, 344 }; 345 346 /* Definition of the hv_post_message hypercall input structure. */ 347 struct hv_input_post_message { 348 union hv_connection_id connectionid; 349 u32 reserved; 350 enum hv_message_type message_type; 351 u32 payload_size; 352 u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT]; 353 }; 354 355 /* 356 * Versioning definitions used for guests reporting themselves to the 357 * hypervisor, and visa versa. 358 */ 359 360 /* Version info reported by guest OS's */ 361 enum hv_guest_os_vendor { 362 HVGUESTOS_VENDOR_MICROSOFT = 0x0001 363 }; 364 365 enum hv_guest_os_microsoft_ids { 366 HVGUESTOS_MICROSOFT_UNDEFINED = 0x00, 367 HVGUESTOS_MICROSOFT_MSDOS = 0x01, 368 HVGUESTOS_MICROSOFT_WINDOWS3X = 0x02, 369 HVGUESTOS_MICROSOFT_WINDOWS9X = 0x03, 370 HVGUESTOS_MICROSOFT_WINDOWSNT = 0x04, 371 HVGUESTOS_MICROSOFT_WINDOWSCE = 0x05 372 }; 373 374 /* 375 * Declare the MSR used to identify the guest OS. 376 */ 377 #define HV_X64_MSR_GUEST_OS_ID 0x40000000 378 379 union hv_x64_msr_guest_os_id_contents { 380 u64 as_uint64; 381 struct { 382 u64 build_number:16; 383 u64 service_version:8; /* Service Pack, etc. */ 384 u64 minor_version:8; 385 u64 major_version:8; 386 u64 os_id:8; /* enum hv_guest_os_microsoft_ids (if Vendor=MS) */ 387 u64 vendor_id:16; /* enum hv_guest_os_vendor */ 388 }; 389 }; 390 391 /* 392 * Declare the MSR used to setup pages used to communicate with the hypervisor. 393 */ 394 #define HV_X64_MSR_HYPERCALL 0x40000001 395 396 union hv_x64_msr_hypercall_contents { 397 u64 as_uint64; 398 struct { 399 u64 enable:1; 400 u64 reserved:11; 401 u64 guest_physical_address:52; 402 }; 403 }; 404 405 406 enum { 407 VMBUS_MESSAGE_CONNECTION_ID = 1, 408 VMBUS_MESSAGE_PORT_ID = 1, 409 VMBUS_EVENT_CONNECTION_ID = 2, 410 VMBUS_EVENT_PORT_ID = 2, 411 VMBUS_MONITOR_CONNECTION_ID = 3, 412 VMBUS_MONITOR_PORT_ID = 3, 413 VMBUS_MESSAGE_SINT = 2, 414 }; 415 416 /* #defines */ 417 418 #define HV_PRESENT_BIT 0x80000000 419 420 /* 421 * The guest OS needs to register the guest ID with the hypervisor. 422 * The guest ID is a 64 bit entity and the structure of this ID is 423 * specified in the Hyper-V specification: 424 * 425 * http://msdn.microsoft.com/en-us/library/windows/hardware/ff542653%28v=vs.85%29.aspx 426 * 427 * While the current guideline does not specify how Linux guest ID(s) 428 * need to be generated, our plan is to publish the guidelines for 429 * Linux and other guest operating systems that currently are hosted 430 * on Hyper-V. The implementation here conforms to this yet 431 * unpublished guidelines. 432 * 433 * 434 * Bit(s) 435 * 63 - Indicates if the OS is Open Source or not; 1 is Open Source 436 * 62:56 - Os Type; Linux is 0x100 437 * 55:48 - Distro specific identification 438 * 47:16 - Linux kernel version number 439 * 15:0 - Distro specific identification 440 * 441 * 442 */ 443 444 #define HV_LINUX_VENDOR_ID 0x8100 445 446 /* 447 * Generate the guest ID based on the guideline described above. 448 */ 449 450 static inline __u64 generate_guest_id(__u8 d_info1, __u32 kernel_version, 451 __u16 d_info2) 452 { 453 __u64 guest_id = 0; 454 455 guest_id = (((__u64)HV_LINUX_VENDOR_ID) << 48); 456 guest_id |= (((__u64)(d_info1)) << 48); 457 guest_id |= (((__u64)(kernel_version)) << 16); 458 guest_id |= ((__u64)(d_info2)); 459 460 return guest_id; 461 } 462 463 464 #define HV_CPU_POWER_MANAGEMENT (1 << 0) 465 #define HV_RECOMMENDATIONS_MAX 4 466 467 #define HV_X64_MAX 5 468 #define HV_CAPS_MAX 8 469 470 471 #define HV_HYPERCALL_PARAM_ALIGN sizeof(u64) 472 473 474 /* Service definitions */ 475 476 #define HV_SERVICE_PARENT_PORT (0) 477 #define HV_SERVICE_PARENT_CONNECTION (0) 478 479 #define HV_SERVICE_CONNECT_RESPONSE_SUCCESS (0) 480 #define HV_SERVICE_CONNECT_RESPONSE_INVALID_PARAMETER (1) 481 #define HV_SERVICE_CONNECT_RESPONSE_UNKNOWN_SERVICE (2) 482 #define HV_SERVICE_CONNECT_RESPONSE_CONNECTION_REJECTED (3) 483 484 #define HV_SERVICE_CONNECT_REQUEST_MESSAGE_ID (1) 485 #define HV_SERVICE_CONNECT_RESPONSE_MESSAGE_ID (2) 486 #define HV_SERVICE_DISCONNECT_REQUEST_MESSAGE_ID (3) 487 #define HV_SERVICE_DISCONNECT_RESPONSE_MESSAGE_ID (4) 488 #define HV_SERVICE_MAX_MESSAGE_ID (4) 489 490 #define HV_SERVICE_PROTOCOL_VERSION (0x0010) 491 #define HV_CONNECT_PAYLOAD_BYTE_COUNT 64 492 493 /* #define VMBUS_REVISION_NUMBER 6 */ 494 495 /* Our local vmbus's port and connection id. Anything >0 is fine */ 496 /* #define VMBUS_PORT_ID 11 */ 497 498 /* 628180B8-308D-4c5e-B7DB-1BEB62E62EF4 */ 499 static const uuid_le VMBUS_SERVICE_ID = { 500 .b = { 501 0xb8, 0x80, 0x81, 0x62, 0x8d, 0x30, 0x5e, 0x4c, 502 0xb7, 0xdb, 0x1b, 0xeb, 0x62, 0xe6, 0x2e, 0xf4 503 }, 504 }; 505 506 507 508 struct hv_context { 509 /* We only support running on top of Hyper-V 510 * So at this point this really can only contain the Hyper-V ID 511 */ 512 u64 guestid; 513 514 void *hypercall_page; 515 void *tsc_page; 516 517 bool synic_initialized; 518 519 void *synic_message_page[NR_CPUS]; 520 void *synic_event_page[NR_CPUS]; 521 /* 522 * Hypervisor's notion of virtual processor ID is different from 523 * Linux' notion of CPU ID. This information can only be retrieved 524 * in the context of the calling CPU. Setup a map for easy access 525 * to this information: 526 * 527 * vp_index[a] is the Hyper-V's processor ID corresponding to 528 * Linux cpuid 'a'. 529 */ 530 u32 vp_index[NR_CPUS]; 531 /* 532 * Starting with win8, we can take channel interrupts on any CPU; 533 * we will manage the tasklet that handles events on a per CPU 534 * basis. 535 */ 536 struct tasklet_struct *event_dpc[NR_CPUS]; 537 /* 538 * To optimize the mapping of relid to channel, maintain 539 * per-cpu list of the channels based on their CPU affinity. 540 */ 541 struct list_head percpu_list[NR_CPUS]; 542 /* 543 * buffer to post messages to the host. 544 */ 545 void *post_msg_page[NR_CPUS]; 546 /* 547 * Support PV clockevent device. 548 */ 549 struct clock_event_device *clk_evt[NR_CPUS]; 550 /* 551 * To manage allocations in a NUMA node. 552 * Array indexed by numa node ID. 553 */ 554 struct cpumask *hv_numa_map; 555 }; 556 557 extern struct hv_context hv_context; 558 559 struct ms_hyperv_tsc_page { 560 volatile u32 tsc_sequence; 561 u32 reserved1; 562 volatile u64 tsc_scale; 563 volatile s64 tsc_offset; 564 u64 reserved2[509]; 565 }; 566 567 struct hv_ring_buffer_debug_info { 568 u32 current_interrupt_mask; 569 u32 current_read_index; 570 u32 current_write_index; 571 u32 bytes_avail_toread; 572 u32 bytes_avail_towrite; 573 }; 574 575 /* Hv Interface */ 576 577 extern int hv_init(void); 578 579 extern void hv_cleanup(void); 580 581 extern int hv_post_message(union hv_connection_id connection_id, 582 enum hv_message_type message_type, 583 void *payload, size_t payload_size); 584 585 extern u16 hv_signal_event(void *con_id); 586 587 extern int hv_synic_alloc(void); 588 589 extern void hv_synic_free(void); 590 591 extern void hv_synic_init(void *irqarg); 592 593 extern void hv_synic_cleanup(void *arg); 594 595 extern void hv_synic_clockevents_cleanup(void); 596 597 /* 598 * Host version information. 599 */ 600 extern unsigned int host_info_eax; 601 extern unsigned int host_info_ebx; 602 extern unsigned int host_info_ecx; 603 extern unsigned int host_info_edx; 604 605 /* Interface */ 606 607 608 int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, void *buffer, 609 u32 buflen); 610 611 void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info); 612 613 int hv_ringbuffer_write(struct hv_ring_buffer_info *ring_info, 614 struct kvec *kv_list, 615 u32 kv_count, bool *signal); 616 617 int hv_ringbuffer_peek(struct hv_ring_buffer_info *ring_info, void *buffer, 618 u32 buflen); 619 620 int hv_ringbuffer_read(struct hv_ring_buffer_info *ring_info, 621 void *buffer, 622 u32 buflen, 623 u32 offset, bool *signal); 624 625 626 void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info, 627 struct hv_ring_buffer_debug_info *debug_info); 628 629 void hv_begin_read(struct hv_ring_buffer_info *rbi); 630 631 u32 hv_end_read(struct hv_ring_buffer_info *rbi); 632 633 /* 634 * Maximum channels is determined by the size of the interrupt page 635 * which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt 636 * and the other is receive endpoint interrupt 637 */ 638 #define MAX_NUM_CHANNELS ((PAGE_SIZE >> 1) << 3) /* 16348 channels */ 639 640 /* The value here must be in multiple of 32 */ 641 /* TODO: Need to make this configurable */ 642 #define MAX_NUM_CHANNELS_SUPPORTED 256 643 644 645 enum vmbus_connect_state { 646 DISCONNECTED, 647 CONNECTING, 648 CONNECTED, 649 DISCONNECTING 650 }; 651 652 #define MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT 653 654 struct vmbus_connection { 655 enum vmbus_connect_state conn_state; 656 657 atomic_t next_gpadl_handle; 658 659 struct completion unload_event; 660 /* 661 * Represents channel interrupts. Each bit position represents a 662 * channel. When a channel sends an interrupt via VMBUS, it finds its 663 * bit in the sendInterruptPage, set it and calls Hv to generate a port 664 * event. The other end receives the port event and parse the 665 * recvInterruptPage to see which bit is set 666 */ 667 void *int_page; 668 void *send_int_page; 669 void *recv_int_page; 670 671 /* 672 * 2 pages - 1st page for parent->child notification and 2nd 673 * is child->parent notification 674 */ 675 struct hv_monitor_page *monitor_pages[2]; 676 struct list_head chn_msg_list; 677 spinlock_t channelmsg_lock; 678 679 /* List of channels */ 680 struct list_head chn_list; 681 spinlock_t channel_lock; 682 683 struct workqueue_struct *work_queue; 684 }; 685 686 687 struct vmbus_msginfo { 688 /* Bookkeeping stuff */ 689 struct list_head msglist_entry; 690 691 /* The message itself */ 692 unsigned char msg[0]; 693 }; 694 695 696 extern struct vmbus_connection vmbus_connection; 697 698 enum vmbus_message_handler_type { 699 /* The related handler can sleep. */ 700 VMHT_BLOCKING = 0, 701 702 /* The related handler must NOT sleep. */ 703 VMHT_NON_BLOCKING = 1, 704 }; 705 706 struct vmbus_channel_message_table_entry { 707 enum vmbus_channel_message_type message_type; 708 enum vmbus_message_handler_type handler_type; 709 void (*message_handler)(struct vmbus_channel_message_header *msg); 710 }; 711 712 extern struct vmbus_channel_message_table_entry 713 channel_message_table[CHANNELMSG_COUNT]; 714 715 /* General vmbus interface */ 716 717 struct hv_device *vmbus_device_create(const uuid_le *type, 718 const uuid_le *instance, 719 struct vmbus_channel *channel); 720 721 int vmbus_device_register(struct hv_device *child_device_obj); 722 void vmbus_device_unregister(struct hv_device *device_obj); 723 724 /* static void */ 725 /* VmbusChildDeviceDestroy( */ 726 /* struct hv_device *); */ 727 728 struct vmbus_channel *relid2channel(u32 relid); 729 730 void vmbus_free_channels(void); 731 732 /* Connection interface */ 733 734 int vmbus_connect(void); 735 void vmbus_disconnect(void); 736 737 int vmbus_post_msg(void *buffer, size_t buflen); 738 739 int vmbus_set_event(struct vmbus_channel *channel); 740 741 void vmbus_on_event(unsigned long data); 742 743 int hv_kvp_init(struct hv_util_service *); 744 void hv_kvp_deinit(void); 745 void hv_kvp_onchannelcallback(void *); 746 747 int hv_vss_init(struct hv_util_service *); 748 void hv_vss_deinit(void); 749 void hv_vss_onchannelcallback(void *); 750 751 int hv_fcopy_init(struct hv_util_service *); 752 void hv_fcopy_deinit(void); 753 void hv_fcopy_onchannelcallback(void *); 754 void vmbus_initiate_unload(void); 755 756 static inline void hv_poll_channel(struct vmbus_channel *channel, 757 void (*cb)(void *)) 758 { 759 if (!channel) 760 return; 761 762 if (channel->target_cpu != smp_processor_id()) 763 smp_call_function_single(channel->target_cpu, 764 cb, channel, true); 765 else 766 cb(channel); 767 } 768 769 enum hvutil_device_state { 770 HVUTIL_DEVICE_INIT = 0, /* driver is loaded, waiting for userspace */ 771 HVUTIL_READY, /* userspace is registered */ 772 HVUTIL_HOSTMSG_RECEIVED, /* message from the host was received */ 773 HVUTIL_USERSPACE_REQ, /* request to userspace was sent */ 774 HVUTIL_USERSPACE_RECV, /* reply from userspace was received */ 775 HVUTIL_DEVICE_DYING, /* driver unload is in progress */ 776 }; 777 778 #endif /* _HYPERV_VMBUS_H */ 779