sys/dev/hyperv/vmbus/hv_vmbus_priv.h

   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 #ifndef __HYPERV_PRIV_H__
  32 #define __HYPERV_PRIV_H__
  33
  34 #include <sys/param.h>
  35 #include <sys/lock.h>
  36 #include <sys/mutex.h>
  37 #include <sys/sema.h>
  38
  39 #include <dev/hyperv/include/hyperv.h>
  40
  41
  42 /*
  43  *  Status codes for hypervisor operations.
  44  */
  45
  46 typedef uint16_t hv_vmbus_status;
  47
  48 #define HV_MESSAGE_SIZE                 (256)
  49 #define HV_MESSAGE_PAYLOAD_BYTE_COUNT   (240)
  50 #define HV_MESSAGE_PAYLOAD_QWORD_COUNT  (30)
  51 #define HV_ANY_VP                       (0xFFFFFFFF)
  52
  53 /*
  54  * Synthetic interrupt controller flag constants.
  55  */
  56
  57 #define HV_EVENT_FLAGS_COUNT        (256 * 8)
  58 #define HV_EVENT_FLAGS_BYTE_COUNT   (256)
  59 #define HV_EVENT_FLAGS_DWORD_COUNT  (256 / sizeof(uint32_t))
  60
  61 /**
  62  * max channel count <== event_flags_dword_count * bit_of_dword
  63  */
  64 #define HV_CHANNEL_DWORD_LEN        (32)
  65 #define HV_CHANNEL_MAX_COUNT        \
  66         ((HV_EVENT_FLAGS_DWORD_COUNT) * HV_CHANNEL_DWORD_LEN)
  67 /*
  68  * MessageId: HV_STATUS_INSUFFICIENT_BUFFERS
  69  * MessageText:
  70  *    You did not supply enough message buffers to send a message.
  71  */
  72
  73 #define HV_STATUS_SUCCESS                ((uint16_t)0)
  74 #define HV_STATUS_INSUFFICIENT_BUFFERS   ((uint16_t)0x0013)
  75
  76 typedef void (*hv_vmbus_channel_callback)(void *context);
  77
  78 typedef struct {
  79         void*           data;
  80         uint32_t        length;
  81 } hv_vmbus_sg_buffer_list;
  82
  83 typedef struct {
  84         uint32_t        current_interrupt_mask;
  85         uint32_t        current_read_index;
  86         uint32_t        current_write_index;
  87         uint32_t        bytes_avail_to_read;
  88         uint32_t        bytes_avail_to_write;
  89 } hv_vmbus_ring_buffer_debug_info;
  90
  91 typedef struct {
  92         uint32_t                rel_id;
  93         hv_vmbus_channel_state  state;
  94         hv_guid                 interface_type;
  95         hv_guid                 interface_instance;
  96         uint32_t                monitor_id;
  97         uint32_t                server_monitor_pending;
  98         uint32_t                server_monitor_latency;
  99         uint32_t                server_monitor_connection_id;
 100         uint32_t                client_monitor_pending;
 101         uint32_t                client_monitor_latency;
 102         uint32_t                client_monitor_connection_id;
 103         hv_vmbus_ring_buffer_debug_info inbound;
 104         hv_vmbus_ring_buffer_debug_info outbound;
 105 } hv_vmbus_channel_debug_info;
 106
 107 typedef union {
 108         hv_vmbus_channel_version_supported      version_supported;
 109         hv_vmbus_channel_open_result            open_result;
 110         hv_vmbus_channel_gpadl_torndown         gpadl_torndown;
 111         hv_vmbus_channel_gpadl_created          gpadl_created;
 112         hv_vmbus_channel_version_response       version_response;
 113 } hv_vmbus_channel_msg_response;
 114
 115 /*
 116  * Represents each channel msg on the vmbus connection
 117  * This is a variable-size data structure depending on
 118  * the msg type itself
 119  */
 120 typedef struct hv_vmbus_channel_msg_info {
 121         /*
 122          * Bookkeeping stuff
 123          */
 124         TAILQ_ENTRY(hv_vmbus_channel_msg_info)  msg_list_entry;
 125         /*
 126          * So far, this is only used to handle
 127          * gpadl body message
 128          */
 129         TAILQ_HEAD(, hv_vmbus_channel_msg_info) sub_msg_list_anchor;
 130         /*
 131          * Synchronize the request/response if
 132          * needed.
 133          * KYS: Use a semaphore for now.
 134          * Not perf critical.
 135          */
 136         struct sema                             wait_sema;
 137         hv_vmbus_channel_msg_response           response;
 138         uint32_t                                message_size;
 139         /**
 140          * The channel message that goes out on
 141          *  the "wire". It will contain at
 142          *  minimum the
 143          *  hv_vmbus_channel_msg_header
 144          * header.
 145          */
 146         unsigned char                           msg[0];
 147 } hv_vmbus_channel_msg_info;
 148
 149 /*
 150  * The format must be the same as hv_vm_data_gpa_direct
 151  */
 152 typedef struct hv_vmbus_channel_packet_page_buffer {
 153         uint16_t                type;
 154         uint16_t                data_offset8;
 155         uint16_t                length8;
 156         uint16_t                flags;
 157         uint64_t                transaction_id;
 158         uint32_t                reserved;
 159         uint32_t                range_count;
 160         hv_vmbus_page_buffer    range[HV_MAX_PAGE_BUFFER_COUNT];
 161 } __packed hv_vmbus_channel_packet_page_buffer;
 162
 163 /*
 164  * The format must be the same as hv_vm_data_gpa_direct
 165  */
 166 typedef struct hv_vmbus_channel_packet_multipage_buffer {
 167         uint16_t                        type;
 168         uint16_t                        data_offset8;
 169         uint16_t                        length8;
 170         uint16_t                        flags;
 171         uint64_t                        transaction_id;
 172         uint32_t                        reserved;
 173         uint32_t                        range_count; /* Always 1 in this case */
 174         hv_vmbus_multipage_buffer       range;
 175 } __packed hv_vmbus_channel_packet_multipage_buffer;
 176
 177 enum {
 178         HV_VMBUS_MESSAGE_CONNECTION_ID  = 1,
 179         HV_VMBUS_MESSAGE_PORT_ID        = 1,
 180         HV_VMBUS_EVENT_CONNECTION_ID    = 2,
 181         HV_VMBUS_EVENT_PORT_ID          = 2,
 182         HV_VMBUS_MONITOR_CONNECTION_ID  = 3,
 183         HV_VMBUS_MONITOR_PORT_ID        = 3,
 184         HV_VMBUS_MESSAGE_SINT           = 2
 185 };
 186
 187 #define HV_PRESENT_BIT          0x80000000
 188
 189 #define HV_HYPERCALL_PARAM_ALIGN sizeof(uint64_t)
 190
 191 typedef struct {
 192         uint64_t        guest_id;
 193         void*           hypercall_page;
 194         hv_bool_uint8_t syn_ic_initialized;
 195
 196         hv_vmbus_handle syn_ic_msg_page[MAXCPU];
 197         hv_vmbus_handle syn_ic_event_page[MAXCPU];
 198         /*
 199          * For FreeBSD cpuid to Hyper-V vcpuid mapping.
 200          */
 201         uint32_t        hv_vcpu_index[MAXCPU];
 202         /*
 203          * Each cpu has its own software interrupt handler for channel
 204          * event and msg handling.
 205          */
 206         struct taskqueue                *hv_event_queue[MAXCPU];
 207         struct intr_event               *hv_msg_intr_event[MAXCPU];
 208         void                            *msg_swintr[MAXCPU];
 209         /*
 210          * Host use this vector to intrrupt guest for vmbus channel
 211          * event and msg.
 212          */
 213         unsigned int                    hv_cb_vector;
 214 } hv_vmbus_context;
 215
 216 /*
 217  * Define hypervisor message types
 218  */
 219 typedef enum {
 220
 221         HV_MESSAGE_TYPE_NONE                            = 0x00000000,
 222
 223         /*
 224          * Memory access messages
 225          */
 226         HV_MESSAGE_TYPE_UNMAPPED_GPA                    = 0x80000000,
 227         HV_MESSAGE_TYPE_GPA_INTERCEPT                   = 0x80000001,
 228
 229         /*
 230          * Timer notification messages
 231          */
 232         HV_MESSAGE_TIMER_EXPIRED                        = 0x80000010,
 233
 234         /*
 235          * Error messages
 236          */
 237         HV_MESSAGE_TYPE_INVALID_VP_REGISTER_VALUE       = 0x80000020,
 238         HV_MESSAGE_TYPE_UNRECOVERABLE_EXCEPTION         = 0x80000021,
 239         HV_MESSAGE_TYPE_UNSUPPORTED_FEATURE             = 0x80000022,
 240
 241         /*
 242          * Trace buffer complete messages
 243          */
 244         HV_MESSAGE_TYPE_EVENT_LOG_BUFFER_COMPLETE       = 0x80000040,
 245
 246         /*
 247          * Platform-specific processor intercept messages
 248          */
 249         HV_MESSAGE_TYPE_X64_IO_PORT_INTERCEPT           = 0x80010000,
 250         HV_MESSAGE_TYPE_X64_MSR_INTERCEPT               = 0x80010001,
 251         HV_MESSAGE_TYPE_X64_CPU_INTERCEPT               = 0x80010002,
 252         HV_MESSAGE_TYPE_X64_EXCEPTION_INTERCEPT         = 0x80010003,
 253         HV_MESSAGE_TYPE_X64_APIC_EOI                    = 0x80010004,
 254         HV_MESSAGE_TYPE_X64_LEGACY_FP_ERROR             = 0x80010005
 255
 256 } hv_vmbus_msg_type;
 257
 258 /*
 259  * Define port identifier type
 260  */
 261 typedef union _hv_vmbus_port_id {
 262         uint32_t        as_uint32_t;
 263         struct {
 264                 uint32_t        id:24;
 265                 uint32_t        reserved:8;
 266         } u ;
 267 } hv_vmbus_port_id;
 268
 269 /*
 270  * Define synthetic interrupt controller message flag
 271  */
 272 typedef union {
 273         uint8_t as_uint8_t;
 274         struct {
 275                 uint8_t message_pending:1;
 276                 uint8_t reserved:7;
 277         } u;
 278 } hv_vmbus_msg_flags;
 279
 280 typedef uint64_t hv_vmbus_partition_id;
 281
 282 /*
 283  * Define synthetic interrupt controller message header
 284  */
 285 typedef struct {
 286         hv_vmbus_msg_type       message_type;
 287         uint8_t                 payload_size;
 288         hv_vmbus_msg_flags      message_flags;
 289         uint8_t                 reserved[2];
 290         union {
 291                 hv_vmbus_partition_id   sender;
 292                 hv_vmbus_port_id        port;
 293         } u;
 294 } hv_vmbus_msg_header;
 295
 296 /*
 297  *  Define synthetic interrupt controller message format
 298  */
 299 typedef struct {
 300         hv_vmbus_msg_header     header;
 301         union {
 302                 uint64_t        payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
 303         } u ;
 304 } hv_vmbus_message;
 305
 306 /*
 307  *  Maximum channels is determined by the size of the interrupt
 308  *  page which is PAGE_SIZE. 1/2 of PAGE_SIZE is for
 309  *  send endpoint interrupt and the other is receive
 310  *  endpoint interrupt.
 311  *
 312  *   Note: (PAGE_SIZE >> 1) << 3 allocates 16348 channels
 313  */
 314 #define HV_MAX_NUM_CHANNELS                     (PAGE_SIZE >> 1) << 3
 315
 316 /*
 317  * (The value here must be in multiple of 32)
 318  */
 319 #define HV_MAX_NUM_CHANNELS_SUPPORTED           256
 320
 321 /*
 322  * VM Bus connection states
 323  */
 324 typedef enum {
 325         HV_DISCONNECTED,
 326         HV_CONNECTING,
 327         HV_CONNECTED,
 328         HV_DISCONNECTING
 329 } hv_vmbus_connect_state;
 330
 331 #define HV_MAX_SIZE_CHANNEL_MESSAGE     HV_MESSAGE_PAYLOAD_BYTE_COUNT
 332
 333
 334 typedef struct {
 335         hv_vmbus_connect_state                  connect_state;
 336         uint32_t                                next_gpadl_handle;
 337         /**
 338          * Represents channel interrupts. Each bit position
 339          * represents a channel.
 340          * When a channel sends an interrupt via VMBUS, it
 341          * finds its bit in the send_interrupt_page, set it and
 342          * calls Hv to generate a port event. The other end
 343          * receives the port event and parse the
 344          * recv_interrupt_page to see which bit is set
 345          */
 346         void                                    *interrupt_page;
 347         void                                    *send_interrupt_page;
 348         void                                    *recv_interrupt_page;
 349         /*
 350          * 2 pages - 1st page for parent->child
 351          * notification and 2nd is child->parent
 352          * notification
 353          */
 354         void                                    *monitor_page_1;
 355         void                                    *monitor_page_2;
 356         TAILQ_HEAD(, hv_vmbus_channel_msg_info) channel_msg_anchor;
 357         struct mtx                              channel_msg_lock;
 358         /**
 359          * List of primary channels. Sub channels will be linked
 360          * under their primary channel.
 361          */
 362         TAILQ_HEAD(, hv_vmbus_channel)          channel_anchor;
 363         struct mtx                              channel_lock;
 364
 365         /**
 366          * channel table for fast lookup through id.
 367         */
 368         hv_vmbus_channel                        **channels;
 369 } hv_vmbus_connection;
 370
 371 typedef union {
 372         uint64_t as_uint64_t;
 373         struct {
 374                 uint64_t build_number           : 16;
 375                 uint64_t service_version        : 8; /* Service Pack, etc. */
 376                 uint64_t minor_version          : 8;
 377                 uint64_t major_version          : 8;
 378                 /*
 379                  * HV_GUEST_OS_MICROSOFT_IDS (If Vendor=MS)
 380                  * HV_GUEST_OS_VENDOR
 381                  */
 382                 uint64_t os_id                  : 8;
 383                 uint64_t vendor_id              : 16;
 384         } u;
 385 } hv_vmbus_x64_msr_guest_os_id_contents;
 386
 387
 388 typedef union {
 389         uint64_t as_uint64_t;
 390         struct {
 391                 uint64_t enable :1;
 392                 uint64_t reserved :11;
 393                 uint64_t guest_physical_address :52;
 394         } u;
 395 } hv_vmbus_x64_msr_hypercall_contents;
 396
 397 typedef union {
 398         uint32_t as_uint32_t;
 399         struct {
 400                 uint32_t group_enable :4;
 401                 uint32_t rsvd_z :28;
 402         } u;
 403 } hv_vmbus_monitor_trigger_state;
 404
 405 typedef union {
 406         uint64_t as_uint64_t;
 407         struct {
 408                 uint32_t pending;
 409                 uint32_t armed;
 410         } u;
 411 } hv_vmbus_monitor_trigger_group;
 412
 413 typedef struct {
 414         hv_vmbus_connection_id  connection_id;
 415         uint16_t                flag_number;
 416         uint16_t                rsvd_z;
 417 } hv_vmbus_monitor_parameter;
 418
 419 /*
 420  * hv_vmbus_monitor_page Layout
 421  * ------------------------------------------------------
 422  * | 0   | trigger_state (4 bytes) | Rsvd1 (4 bytes)     |
 423  * | 8   | trigger_group[0]                              |
 424  * | 10  | trigger_group[1]                              |
 425  * | 18  | trigger_group[2]                              |
 426  * | 20  | trigger_group[3]                              |
 427  * | 28  | Rsvd2[0]                                      |
 428  * | 30  | Rsvd2[1]                                      |
 429  * | 38  | Rsvd2[2]                                      |
 430  * | 40  | next_check_time[0][0] | next_check_time[0][1] |
 431  * | ...                                                 |
 432  * | 240 | latency[0][0..3]                              |
 433  * | 340 | Rsvz3[0]                                      |
 434  * | 440 | parameter[0][0]                               |
 435  * | 448 | parameter[0][1]                               |
 436  * | ...                                                 |
 437  * | 840 | Rsvd4[0]                                      |
 438  * ------------------------------------------------------
 439  */
 440
 441 typedef struct {
 442         hv_vmbus_monitor_trigger_state  trigger_state;
 443         uint32_t                        rsvd_z1;
 444
 445         hv_vmbus_monitor_trigger_group  trigger_group[4];
 446         uint64_t                        rsvd_z2[3];
 447
 448         int32_t                         next_check_time[4][32];
 449
 450         uint16_t                        latency[4][32];
 451         uint64_t                        rsvd_z3[32];
 452
 453         hv_vmbus_monitor_parameter      parameter[4][32];
 454
 455         uint8_t                         rsvd_z4[1984];
 456 } hv_vmbus_monitor_page;
 457
 458 /*
 459  * The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent
 460  * is set by CPUID(HV_CPU_ID_FUNCTION_VERSION_AND_FEATURES).
 461  */
 462 typedef enum {
 463         HV_CPU_ID_FUNCTION_VERSION_AND_FEATURES                 = 0x00000001,
 464         HV_CPU_ID_FUNCTION_HV_VENDOR_AND_MAX_FUNCTION           = 0x40000000,
 465         HV_CPU_ID_FUNCTION_HV_INTERFACE                         = 0x40000001,
 466         /*
 467          * The remaining functions depend on the value
 468          * of hv_cpu_id_function_interface
 469          */
 470         HV_CPU_ID_FUNCTION_MS_HV_VERSION                        = 0x40000002,
 471         HV_CPU_ID_FUNCTION_MS_HV_FEATURES                       = 0x40000003,
 472         HV_CPU_ID_FUNCTION_MS_HV_ENLIGHTENMENT_INFORMATION      = 0x40000004,
 473         HV_CPU_ID_FUNCTION_MS_HV_IMPLEMENTATION_LIMITS          = 0x40000005
 474
 475 } hv_vmbus_cpuid_function;
 476
 477 /*
 478  * Define the format of the SIMP register
 479  */
 480 typedef union {
 481         uint64_t as_uint64_t;
 482         struct {
 483                 uint64_t simp_enabled   : 1;
 484                 uint64_t preserved      : 11;
 485                 uint64_t base_simp_gpa  : 52;
 486         } u;
 487 } hv_vmbus_synic_simp;
 488
 489 /*
 490  * Define the format of the SIEFP register
 491  */
 492 typedef union {
 493         uint64_t as_uint64_t;
 494         struct {
 495                 uint64_t siefp_enabled  : 1;
 496                 uint64_t preserved      : 11;
 497                 uint64_t base_siefp_gpa : 52;
 498         } u;
 499 } hv_vmbus_synic_siefp;
 500
 501 /*
 502  * Define synthetic interrupt source
 503  */
 504 typedef union {
 505         uint64_t as_uint64_t;
 506         struct {
 507                 uint64_t vector         : 8;
 508                 uint64_t reserved1      : 8;
 509                 uint64_t masked         : 1;
 510                 uint64_t auto_eoi       : 1;
 511                 uint64_t reserved2      : 46;
 512         } u;
 513 } hv_vmbus_synic_sint;
 514
 515 /*
 516  * Timer configuration register.
 517  */
 518 union hv_timer_config {
 519         uint64_t as_uint64;
 520         struct {
 521                 uint64_t enable:1;
 522                 uint64_t periodic:1;
 523                 uint64_t lazy:1;
 524                 uint64_t auto_enable:1;
 525                 uint64_t reserved_z0:12;
 526                 uint64_t sintx:4;
 527                 uint64_t reserved_z1:44;
 528         };
 529 };
 530
 531 /*
 532  * Define syn_ic control register
 533  */
 534 typedef union _hv_vmbus_synic_scontrol {
 535     uint64_t as_uint64_t;
 536     struct {
 537         uint64_t enable         : 1;
 538         uint64_t reserved       : 63;
 539     } u;
 540 } hv_vmbus_synic_scontrol;
 541
 542 /*
 543  *  Define the hv_vmbus_post_message hypercall input structure
 544  */
 545 typedef struct {
 546         hv_vmbus_connection_id  connection_id;
 547         uint32_t                reserved;
 548         hv_vmbus_msg_type       message_type;
 549         uint32_t                payload_size;
 550         uint64_t                payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
 551 } hv_vmbus_input_post_message;
 552
 553 /*
 554  * Define the synthetic interrupt controller event flags format
 555  */
 556 typedef union {
 557         uint8_t         flags8[HV_EVENT_FLAGS_BYTE_COUNT];
 558         uint32_t        flags32[HV_EVENT_FLAGS_DWORD_COUNT];
 559 } hv_vmbus_synic_event_flags;
 560
 561 #define HV_X64_CPUID_MIN        (0x40000005)
 562 #define HV_X64_CPUID_MAX        (0x4000ffff)
 563
 564 /*
 565  * Declare the MSR used to identify the guest OS
 566  */
 567 #define HV_X64_MSR_GUEST_OS_ID  (0x40000000)
 568 /*
 569  *  Declare the MSR used to setup pages used to communicate with the hypervisor
 570  */
 571 #define HV_X64_MSR_HYPERCALL    (0x40000001)
 572 /* MSR used to provide vcpu index */
 573 #define HV_X64_MSR_VP_INDEX     (0x40000002)
 574
 575 #define HV_X64_MSR_TIME_REF_COUNT      (0x40000020)
 576
 577 /*
 578  * Define synthetic interrupt controller model specific registers
 579  */
 580 #define HV_X64_MSR_SCONTROL   (0x40000080)
 581 #define HV_X64_MSR_SVERSION   (0x40000081)
 582 #define HV_X64_MSR_SIEFP      (0x40000082)
 583 #define HV_X64_MSR_SIMP       (0x40000083)
 584 #define HV_X64_MSR_EOM        (0x40000084)
 585
 586 #define HV_X64_MSR_SINT0      (0x40000090)
 587 #define HV_X64_MSR_SINT1      (0x40000091)
 588 #define HV_X64_MSR_SINT2      (0x40000092)
 589 #define HV_X64_MSR_SINT3      (0x40000093)
 590 #define HV_X64_MSR_SINT4      (0x40000094)
 591 #define HV_X64_MSR_SINT5      (0x40000095)
 592 #define HV_X64_MSR_SINT6      (0x40000096)
 593 #define HV_X64_MSR_SINT7      (0x40000097)
 594 #define HV_X64_MSR_SINT8      (0x40000098)
 595 #define HV_X64_MSR_SINT9      (0x40000099)
 596 #define HV_X64_MSR_SINT10     (0x4000009A)
 597 #define HV_X64_MSR_SINT11     (0x4000009B)
 598 #define HV_X64_MSR_SINT12     (0x4000009C)
 599 #define HV_X64_MSR_SINT13     (0x4000009D)
 600 #define HV_X64_MSR_SINT14     (0x4000009E)
 601 #define HV_X64_MSR_SINT15     (0x4000009F)
 602
 603 /*
 604  * Synthetic Timer MSRs. Four timers per vcpu.
 605  */
 606 #define HV_X64_MSR_STIMER0_CONFIG               0x400000B0
 607 #define HV_X64_MSR_STIMER0_COUNT                0x400000B1
 608 #define HV_X64_MSR_STIMER1_CONFIG               0x400000B2
 609 #define HV_X64_MSR_STIMER1_COUNT                0x400000B3
 610 #define HV_X64_MSR_STIMER2_CONFIG               0x400000B4
 611 #define HV_X64_MSR_STIMER2_COUNT                0x400000B5
 612 #define HV_X64_MSR_STIMER3_CONFIG               0x400000B6
 613 #define HV_X64_MSR_STIMER3_COUNT                0x400000B7
 614
 615 /*
 616  * Declare the various hypercall operations
 617  */
 618 typedef enum {
 619         HV_CALL_POST_MESSAGE    = 0x005c,
 620         HV_CALL_SIGNAL_EVENT    = 0x005d,
 621 } hv_vmbus_call_code;
 622
 623 /**
 624  * Global variables
 625  */
 626
 627 extern hv_vmbus_context         hv_vmbus_g_context;
 628 extern hv_vmbus_connection      hv_vmbus_g_connection;
 629
 630 typedef void (*vmbus_msg_handler)(hv_vmbus_channel_msg_header *msg);
 631
 632 typedef struct hv_vmbus_channel_msg_table_entry {
 633         hv_vmbus_channel_msg_type    messageType;
 634
 635         vmbus_msg_handler   messageHandler;
 636 } hv_vmbus_channel_msg_table_entry;
 637
 638 extern hv_vmbus_channel_msg_table_entry g_channel_message_table[];
 639
 640 /*
 641  * Private, VM Bus functions
 642  */
 643 struct sysctl_ctx_list;
 644 struct sysctl_oid_list;
 645
 646 void                    hv_ring_buffer_stat(
 647                                 struct sysctl_ctx_list          *ctx,
 648                                 struct sysctl_oid_list          *tree_node,
 649                                 hv_vmbus_ring_buffer_info       *rbi,
 650                                 const char                      *desc);
 651
 652 int                     hv_vmbus_ring_buffer_init(
 653                                 hv_vmbus_ring_buffer_info       *ring_info,
 654                                 void                            *buffer,
 655                                 uint32_t                        buffer_len);
 656
 657 void                    hv_ring_buffer_cleanup(
 658                                 hv_vmbus_ring_buffer_info       *ring_info);
 659
 660 int                     hv_ring_buffer_write(
 661                                 hv_vmbus_ring_buffer_info       *ring_info,
 662                                 hv_vmbus_sg_buffer_list         sg_buffers[],
 663                                 uint32_t                        sg_buff_count,
 664                                 boolean_t                       *need_sig);
 665
 666 int                     hv_ring_buffer_peek(
 667                                 hv_vmbus_ring_buffer_info       *ring_info,
 668                                 void                            *buffer,
 669                                 uint32_t                        buffer_len);
 670
 671 int                     hv_ring_buffer_read(
 672                                 hv_vmbus_ring_buffer_info       *ring_info,
 673                                 void                            *buffer,
 674                                 uint32_t                        buffer_len,
 675                                 uint32_t                        offset);
 676
 677 uint32_t                hv_vmbus_get_ring_buffer_interrupt_mask(
 678                                 hv_vmbus_ring_buffer_info       *ring_info);
 679
 680 void                    hv_vmbus_dump_ring_info(
 681                                 hv_vmbus_ring_buffer_info       *ring_info,
 682                                 char                            *prefix);
 683
 684 void                    hv_ring_buffer_read_begin(
 685                                 hv_vmbus_ring_buffer_info       *ring_info);
 686
 687 uint32_t                hv_ring_buffer_read_end(
 688                                 hv_vmbus_ring_buffer_info       *ring_info);
 689
 690 hv_vmbus_channel*       hv_vmbus_allocate_channel(void);
 691 void                    hv_vmbus_free_vmbus_channel(hv_vmbus_channel *channel);
 692 int                     hv_vmbus_request_channel_offers(void);
 693 void                    hv_vmbus_release_unattached_channels(void);
 694 int                     hv_vmbus_init(void);
 695 void                    hv_vmbus_cleanup(void);
 696
 697 uint16_t                hv_vmbus_post_msg_via_msg_ipc(
 698                                 hv_vmbus_connection_id  connection_id,
 699                                 hv_vmbus_msg_type       message_type,
 700                                 void                    *payload,
 701                                 size_t                  payload_size);
 702
 703 uint16_t                hv_vmbus_signal_event(void *con_id);
 704 void                    hv_vmbus_synic_init(void *irq_arg);
 705 void                    hv_vmbus_synic_cleanup(void *arg);
 706 int                     hv_vmbus_query_hypervisor_presence(void);
 707
 708 struct hv_device*       hv_vmbus_child_device_create(
 709                                 hv_guid                 device_type,
 710                                 hv_guid                 device_instance,
 711                                 hv_vmbus_channel        *channel);
 712
 713 int                     hv_vmbus_child_device_register(
 714                                         struct hv_device *child_dev);
 715 int                     hv_vmbus_child_device_unregister(
 716                                         struct hv_device *child_dev);
 717
 718 /**
 719  * Connection interfaces
 720  */
 721 int                     hv_vmbus_connect(void);
 722 int                     hv_vmbus_disconnect(void);
 723 int                     hv_vmbus_post_message(void *buffer, size_t buf_size);
 724 int                     hv_vmbus_set_event(hv_vmbus_channel *channel);
 725 void                    hv_vmbus_on_events(int cpu);
 726
 727 /**
 728  * Event Timer interfaces
 729  */
 730 void                    hv_et_init(void);
 731 void                    hv_et_intr(struct trapframe*);
 732
 733 /*
 734  * The guest OS needs to register the guest ID with the hypervisor.
 735  * The guest ID is a 64 bit entity and the structure of this ID is
 736  * specified in the Hyper-V specification:
 737  *
 738  * http://msdn.microsoft.com/en-us/library/windows/
 739  * hardware/ff542653%28v=vs.85%29.aspx
 740  *
 741  * While the current guideline does not specify how FreeBSD guest ID(s)
 742  * need to be generated, our plan is to publish the guidelines for
 743  * FreeBSD and other guest operating systems that currently are hosted
 744  * on Hyper-V. The implementation here conforms to this yet
 745  * unpublished guidelines.
 746  *
 747  * Bit(s)
 748  * 63 - Indicates if the OS is Open Source or not; 1 is Open Source
 749  * 62:56 - Os Type; Linux is 0x100, FreeBSD is 0x200
 750  * 55:48 - Distro specific identification
 751  * 47:16 - FreeBSD kernel version number
 752  * 15:0  - Distro specific identification
 753  *
 754  */
 755
 756 #define HV_FREEBSD_VENDOR_ID    0x8200
 757 #define HV_FREEBSD_GUEST_ID     hv_generate_guest_id(0,0)
 758
 759 static inline  uint64_t hv_generate_guest_id(
 760         uint8_t distro_id_part1,
 761         uint16_t distro_id_part2)
 762 {
 763         uint64_t guest_id;
 764         guest_id =  (((uint64_t)HV_FREEBSD_VENDOR_ID) << 48);
 765         guest_id |= (((uint64_t)(distro_id_part1)) << 48);
 766         guest_id |= (((uint64_t)(__FreeBSD_version)) << 16); /* in param.h */
 767         guest_id |= ((uint64_t)(distro_id_part2));
 768         return guest_id;
 769 }
 770
 771 typedef struct {
 772         unsigned int    vector;
 773         void            *page_buffers[2 * MAXCPU];
 774 } hv_setup_args;
 775
 776 #endif  /* __HYPERV_PRIV_H__ */