drivers/staging/hv/hyperv.h

   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_H
  26 #define _HYPERV_H
  27
  28 #include <linux/scatterlist.h>
  29 #include <linux/list.h>
  30 #include <linux/timer.h>
  31 #include <linux/workqueue.h>
  32 #include <linux/completion.h>
  33 #include <linux/device.h>
  34
  35
  36 #include <asm/hyperv.h>
  37
  38 struct hv_guid {
  39         unsigned char data[16];
  40 };
  41
  42 #define MAX_PAGE_BUFFER_COUNT                           16
  43 #define MAX_MULTIPAGE_BUFFER_COUNT                      32 /* 128K */
  44
  45 #pragma pack(push, 1)
  46
  47 /* Single-page buffer */
  48 struct hv_page_buffer {
  49         u32 len;
  50         u32 offset;
  51         u64 pfn;
  52 };
  53
  54 /* Multiple-page buffer */
  55 struct hv_multipage_buffer {
  56         /* Length and Offset determines the # of pfns in the array */
  57         u32 len;
  58         u32 offset;
  59         u64 pfn_array[MAX_MULTIPAGE_BUFFER_COUNT];
  60 };
  61
  62 /* 0x18 includes the proprietary packet header */
  63 #define MAX_PAGE_BUFFER_PACKET          (0x18 +                 \
  64                                         (sizeof(struct hv_page_buffer) * \
  65                                          MAX_PAGE_BUFFER_COUNT))
  66 #define MAX_MULTIPAGE_BUFFER_PACKET     (0x18 +                 \
  67                                          sizeof(struct hv_multipage_buffer))
  68
  69
  70 #pragma pack(pop)
  71
  72 struct hv_ring_buffer {
  73         /* Offset in bytes from the start of ring data below */
  74         u32 write_index;
  75
  76         /* Offset in bytes from the start of ring data below */
  77         u32 read_index;
  78
  79         u32 interrupt_mask;
  80
  81         /* Pad it to PAGE_SIZE so that data starts on page boundary */
  82         u8      reserved[4084];
  83
  84         /* NOTE:
  85          * The interrupt_mask field is used only for channels but since our
  86          * vmbus connection also uses this data structure and its data starts
  87          * here, we commented out this field.
  88          */
  89
  90         /*
  91          * Ring data starts here + RingDataStartOffset
  92          * !!! DO NOT place any fields below this !!!
  93          */
  94         u8 buffer[0];
  95 } __packed;
  96
  97 struct hv_ring_buffer_info {
  98         struct hv_ring_buffer *ring_buffer;
  99         u32 ring_size;                  /* Include the shared header */
 100         spinlock_t ring_lock;
 101
 102         u32 ring_datasize;              /* < ring_size */
 103         u32 ring_data_startoffset;
 104 };
 105
 106 struct hv_ring_buffer_debug_info {
 107         u32 current_interrupt_mask;
 108         u32 current_read_index;
 109         u32 current_write_index;
 110         u32 bytes_avail_toread;
 111         u32 bytes_avail_towrite;
 112 };
 113
 114 /*
 115  * We use the same version numbering for all Hyper-V modules.
 116  *
 117  * Definition of versioning is as follows;
 118  *
 119  *      Major Number    Changes for these scenarios;
 120  *                      1.      When a new version of Windows Hyper-V
 121  *                              is released.
 122  *                      2.      A Major change has occurred in the
 123  *                              Linux IC's.
 124  *                      (For example the merge for the first time
 125  *                      into the kernel) Every time the Major Number
 126  *                      changes, the Revision number is reset to 0.
 127  *      Minor Number    Changes when new functionality is added
 128  *                      to the Linux IC's that is not a bug fix.
 129  *
 130  * 3.1 - Added completed hv_utils driver. Shutdown/Heartbeat/Timesync
 131  */
 132 #define HV_DRV_VERSION           "3.1"
 133
 134
 135 /*
 136  * A revision number of vmbus that is used for ensuring both ends on a
 137  * partition are using compatible versions.
 138  */
 139 #define VMBUS_REVISION_NUMBER           13
 140
 141 /* Make maximum size of pipe payload of 16K */
 142 #define MAX_PIPE_DATA_PAYLOAD           (sizeof(u8) * 16384)
 143
 144 /* Define PipeMode values. */
 145 #define VMBUS_PIPE_TYPE_BYTE            0x00000000
 146 #define VMBUS_PIPE_TYPE_MESSAGE         0x00000004
 147
 148 /* The size of the user defined data buffer for non-pipe offers. */
 149 #define MAX_USER_DEFINED_BYTES          120
 150
 151 /* The size of the user defined data buffer for pipe offers. */
 152 #define MAX_PIPE_USER_DEFINED_BYTES     116
 153
 154 /*
 155  * At the center of the Channel Management library is the Channel Offer. This
 156  * struct contains the fundamental information about an offer.
 157  */
 158 struct vmbus_channel_offer {
 159         struct hv_guid if_type;
 160         struct hv_guid if_instance;
 161         u64 int_latency; /* in 100ns units */
 162         u32 if_revision;
 163         u32 server_ctx_size;    /* in bytes */
 164         u16 chn_flags;
 165         u16 mmio_megabytes;             /* in bytes * 1024 * 1024 */
 166
 167         union {
 168                 /* Non-pipes: The user has MAX_USER_DEFINED_BYTES bytes. */
 169                 struct {
 170                         unsigned char user_def[MAX_USER_DEFINED_BYTES];
 171                 } std;
 172
 173                 /*
 174                  * Pipes:
 175                  * The following sructure is an integrated pipe protocol, which
 176                  * is implemented on top of standard user-defined data. Pipe
 177                  * clients have MAX_PIPE_USER_DEFINED_BYTES left for their own
 178                  * use.
 179                  */
 180                 struct {
 181                         u32  pipe_mode;
 182                         unsigned char user_def[MAX_PIPE_USER_DEFINED_BYTES];
 183                 } pipe;
 184         } u;
 185         u32 padding;
 186 } __packed;
 187
 188 /* Server Flags */
 189 #define VMBUS_CHANNEL_ENUMERATE_DEVICE_INTERFACE        1
 190 #define VMBUS_CHANNEL_SERVER_SUPPORTS_TRANSFER_PAGES    2
 191 #define VMBUS_CHANNEL_SERVER_SUPPORTS_GPADLS            4
 192 #define VMBUS_CHANNEL_NAMED_PIPE_MODE                   0x10
 193 #define VMBUS_CHANNEL_LOOPBACK_OFFER                    0x100
 194 #define VMBUS_CHANNEL_PARENT_OFFER                      0x200
 195 #define VMBUS_CHANNEL_REQUEST_MONITORED_NOTIFICATION    0x400
 196
 197 struct vmpacket_descriptor {
 198         u16 type;
 199         u16 offset8;
 200         u16 len8;
 201         u16 flags;
 202         u64 trans_id;
 203 } __packed;
 204
 205 struct vmpacket_header {
 206         u32 prev_pkt_start_offset;
 207         struct vmpacket_descriptor descriptor;
 208 } __packed;
 209
 210 struct vmtransfer_page_range {
 211         u32 byte_count;
 212         u32 byte_offset;
 213 } __packed;
 214
 215 struct vmtransfer_page_packet_header {
 216         struct vmpacket_descriptor d;
 217         u16 xfer_pageset_id;
 218         bool sender_owns_set;
 219         u8 reserved;
 220         u32 range_cnt;
 221         struct vmtransfer_page_range ranges[1];
 222 } __packed;
 223
 224 struct vmgpadl_packet_header {
 225         struct vmpacket_descriptor d;
 226         u32 gpadl;
 227         u32 reserved;
 228 } __packed;
 229
 230 struct vmadd_remove_transfer_page_set {
 231         struct vmpacket_descriptor d;
 232         u32 gpadl;
 233         u16 xfer_pageset_id;
 234         u16 reserved;
 235 } __packed;
 236
 237 /*
 238  * This structure defines a range in guest physical space that can be made to
 239  * look virtually contiguous.
 240  */
 241 struct gpa_range {
 242         u32 byte_count;
 243         u32 byte_offset;
 244         u64 pfn_array[0];
 245 };
 246
 247 /*
 248  * This is the format for an Establish Gpadl packet, which contains a handle by
 249  * which this GPADL will be known and a set of GPA ranges associated with it.
 250  * This can be converted to a MDL by the guest OS.  If there are multiple GPA
 251  * ranges, then the resulting MDL will be "chained," representing multiple VA
 252  * ranges.
 253  */
 254 struct vmestablish_gpadl {
 255         struct vmpacket_descriptor d;
 256         u32 gpadl;
 257         u32 range_cnt;
 258         struct gpa_range range[1];
 259 } __packed;
 260
 261 /*
 262  * This is the format for a Teardown Gpadl packet, which indicates that the
 263  * GPADL handle in the Establish Gpadl packet will never be referenced again.
 264  */
 265 struct vmteardown_gpadl {
 266         struct vmpacket_descriptor d;
 267         u32 gpadl;
 268         u32 reserved;   /* for alignment to a 8-byte boundary */
 269 } __packed;
 270
 271 /*
 272  * This is the format for a GPA-Direct packet, which contains a set of GPA
 273  * ranges, in addition to commands and/or data.
 274  */
 275 struct vmdata_gpa_direct {
 276         struct vmpacket_descriptor d;
 277         u32 reserved;
 278         u32 range_cnt;
 279         struct gpa_range range[1];
 280 } __packed;
 281
 282 /* This is the format for a Additional Data Packet. */
 283 struct vmadditional_data {
 284         struct vmpacket_descriptor d;
 285         u64 total_bytes;
 286         u32 offset;
 287         u32 byte_cnt;
 288         unsigned char data[1];
 289 } __packed;
 290
 291 union vmpacket_largest_possible_header {
 292         struct vmpacket_descriptor simple_hdr;
 293         struct vmtransfer_page_packet_header xfer_page_hdr;
 294         struct vmgpadl_packet_header gpadl_hdr;
 295         struct vmadd_remove_transfer_page_set add_rm_xfer_page_hdr;
 296         struct vmestablish_gpadl establish_gpadl_hdr;
 297         struct vmteardown_gpadl teardown_gpadl_hdr;
 298         struct vmdata_gpa_direct data_gpa_direct_hdr;
 299 };
 300
 301 #define VMPACKET_DATA_START_ADDRESS(__packet)   \
 302         (void *)(((unsigned char *)__packet) +  \
 303          ((struct vmpacket_descriptor)__packet)->offset8 * 8)
 304
 305 #define VMPACKET_DATA_LENGTH(__packet)          \
 306         ((((struct vmpacket_descriptor)__packet)->len8 -        \
 307           ((struct vmpacket_descriptor)__packet)->offset8) * 8)
 308
 309 #define VMPACKET_TRANSFER_MODE(__packet)        \
 310         (((struct IMPACT)__packet)->type)
 311
 312 enum vmbus_packet_type {
 313         VM_PKT_INVALID                          = 0x0,
 314         VM_PKT_SYNCH                            = 0x1,
 315         VM_PKT_ADD_XFER_PAGESET                 = 0x2,
 316         VM_PKT_RM_XFER_PAGESET                  = 0x3,
 317         VM_PKT_ESTABLISH_GPADL                  = 0x4,
 318         VM_PKT_TEARDOWN_GPADL                   = 0x5,
 319         VM_PKT_DATA_INBAND                      = 0x6,
 320         VM_PKT_DATA_USING_XFER_PAGES            = 0x7,
 321         VM_PKT_DATA_USING_GPADL                 = 0x8,
 322         VM_PKT_DATA_USING_GPA_DIRECT            = 0x9,
 323         VM_PKT_CANCEL_REQUEST                   = 0xa,
 324         VM_PKT_COMP                             = 0xb,
 325         VM_PKT_DATA_USING_ADDITIONAL_PKT        = 0xc,
 326         VM_PKT_ADDITIONAL_DATA                  = 0xd
 327 };
 328
 329 #define VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED     1
 330
 331
 332 /* Version 1 messages */
 333 enum vmbus_channel_message_type {
 334         CHANNELMSG_INVALID                      =  0,
 335         CHANNELMSG_OFFERCHANNEL         =  1,
 336         CHANNELMSG_RESCIND_CHANNELOFFER =  2,
 337         CHANNELMSG_REQUESTOFFERS                =  3,
 338         CHANNELMSG_ALLOFFERS_DELIVERED  =  4,
 339         CHANNELMSG_OPENCHANNEL          =  5,
 340         CHANNELMSG_OPENCHANNEL_RESULT           =  6,
 341         CHANNELMSG_CLOSECHANNEL         =  7,
 342         CHANNELMSG_GPADL_HEADER         =  8,
 343         CHANNELMSG_GPADL_BODY                   =  9,
 344         CHANNELMSG_GPADL_CREATED                = 10,
 345         CHANNELMSG_GPADL_TEARDOWN               = 11,
 346         CHANNELMSG_GPADL_TORNDOWN               = 12,
 347         CHANNELMSG_RELID_RELEASED               = 13,
 348         CHANNELMSG_INITIATE_CONTACT             = 14,
 349         CHANNELMSG_VERSION_RESPONSE             = 15,
 350         CHANNELMSG_UNLOAD                       = 16,
 351 #ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
 352         CHANNELMSG_VIEWRANGE_ADD                = 17,
 353         CHANNELMSG_VIEWRANGE_REMOVE             = 18,
 354 #endif
 355         CHANNELMSG_COUNT
 356 };
 357
 358 struct vmbus_channel_message_header {
 359         enum vmbus_channel_message_type msgtype;
 360         u32 padding;
 361 } __packed;
 362
 363 /* Query VMBus Version parameters */
 364 struct vmbus_channel_query_vmbus_version {
 365         struct vmbus_channel_message_header header;
 366         u32 version;
 367 } __packed;
 368
 369 /* VMBus Version Supported parameters */
 370 struct vmbus_channel_version_supported {
 371         struct vmbus_channel_message_header header;
 372         bool version_supported;
 373 } __packed;
 374
 375 /* Offer Channel parameters */
 376 struct vmbus_channel_offer_channel {
 377         struct vmbus_channel_message_header header;
 378         struct vmbus_channel_offer offer;
 379         u32 child_relid;
 380         u8 monitorid;
 381         bool monitor_allocated;
 382 } __packed;
 383
 384 /* Rescind Offer parameters */
 385 struct vmbus_channel_rescind_offer {
 386         struct vmbus_channel_message_header header;
 387         u32 child_relid;
 388 } __packed;
 389
 390 /*
 391  * Request Offer -- no parameters, SynIC message contains the partition ID
 392  * Set Snoop -- no parameters, SynIC message contains the partition ID
 393  * Clear Snoop -- no parameters, SynIC message contains the partition ID
 394  * All Offers Delivered -- no parameters, SynIC message contains the partition
 395  *                         ID
 396  * Flush Client -- no parameters, SynIC message contains the partition ID
 397  */
 398
 399 /* Open Channel parameters */
 400 struct vmbus_channel_open_channel {
 401         struct vmbus_channel_message_header header;
 402
 403         /* Identifies the specific VMBus channel that is being opened. */
 404         u32 child_relid;
 405
 406         /* ID making a particular open request at a channel offer unique. */
 407         u32 openid;
 408
 409         /* GPADL for the channel's ring buffer. */
 410         u32 ringbuffer_gpadlhandle;
 411
 412         /* GPADL for the channel's server context save area. */
 413         u32 server_contextarea_gpadlhandle;
 414
 415         /*
 416         * The upstream ring buffer begins at offset zero in the memory
 417         * described by RingBufferGpadlHandle. The downstream ring buffer
 418         * follows it at this offset (in pages).
 419         */
 420         u32 downstream_ringbuffer_pageoffset;
 421
 422         /* User-specific data to be passed along to the server endpoint. */
 423         unsigned char userdata[MAX_USER_DEFINED_BYTES];
 424 } __packed;
 425
 426 /* Open Channel Result parameters */
 427 struct vmbus_channel_open_result {
 428         struct vmbus_channel_message_header header;
 429         u32 child_relid;
 430         u32 openid;
 431         u32 status;
 432 } __packed;
 433
 434 /* Close channel parameters; */
 435 struct vmbus_channel_close_channel {
 436         struct vmbus_channel_message_header header;
 437         u32 child_relid;
 438 } __packed;
 439
 440 /* Channel Message GPADL */
 441 #define GPADL_TYPE_RING_BUFFER          1
 442 #define GPADL_TYPE_SERVER_SAVE_AREA     2
 443 #define GPADL_TYPE_TRANSACTION          8
 444
 445 /*
 446  * The number of PFNs in a GPADL message is defined by the number of
 447  * pages that would be spanned by ByteCount and ByteOffset.  If the
 448  * implied number of PFNs won't fit in this packet, there will be a
 449  * follow-up packet that contains more.
 450  */
 451 struct vmbus_channel_gpadl_header {
 452         struct vmbus_channel_message_header header;
 453         u32 child_relid;
 454         u32 gpadl;
 455         u16 range_buflen;
 456         u16 rangecount;
 457         struct gpa_range range[0];
 458 } __packed;
 459
 460 /* This is the followup packet that contains more PFNs. */
 461 struct vmbus_channel_gpadl_body {
 462         struct vmbus_channel_message_header header;
 463         u32 msgnumber;
 464         u32 gpadl;
 465         u64 pfn[0];
 466 } __packed;
 467
 468 struct vmbus_channel_gpadl_created {
 469         struct vmbus_channel_message_header header;
 470         u32 child_relid;
 471         u32 gpadl;
 472         u32 creation_status;
 473 } __packed;
 474
 475 struct vmbus_channel_gpadl_teardown {
 476         struct vmbus_channel_message_header header;
 477         u32 child_relid;
 478         u32 gpadl;
 479 } __packed;
 480
 481 struct vmbus_channel_gpadl_torndown {
 482         struct vmbus_channel_message_header header;
 483         u32 gpadl;
 484 } __packed;
 485
 486 #ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
 487 struct vmbus_channel_view_range_add {
 488         struct vmbus_channel_message_header header;
 489         PHYSICAL_ADDRESS viewrange_base;
 490         u64 viewrange_length;
 491         u32 child_relid;
 492 } __packed;
 493
 494 struct vmbus_channel_view_range_remove {
 495         struct vmbus_channel_message_header header;
 496         PHYSICAL_ADDRESS viewrange_base;
 497         u32 child_relid;
 498 } __packed;
 499 #endif
 500
 501 struct vmbus_channel_relid_released {
 502         struct vmbus_channel_message_header header;
 503         u32 child_relid;
 504 } __packed;
 505
 506 struct vmbus_channel_initiate_contact {
 507         struct vmbus_channel_message_header header;
 508         u32 vmbus_version_requested;
 509         u32 padding2;
 510         u64 interrupt_page;
 511         u64 monitor_page1;
 512         u64 monitor_page2;
 513 } __packed;
 514
 515 struct vmbus_channel_version_response {
 516         struct vmbus_channel_message_header header;
 517         bool version_supported;
 518 } __packed;
 519
 520 enum vmbus_channel_state {
 521         CHANNEL_OFFER_STATE,
 522         CHANNEL_OPENING_STATE,
 523         CHANNEL_OPEN_STATE,
 524 };
 525
 526 struct vmbus_channel {
 527         struct list_head listentry;
 528
 529         struct hv_device *device_obj;
 530
 531         struct timer_list poll_timer; /* SA-111 workaround */
 532         struct work_struct work;
 533
 534         enum vmbus_channel_state state;
 535         /*
 536          * For util channels, stash the
 537          * the service index for easy access.
 538          */
 539         s8 util_index;
 540
 541         struct vmbus_channel_offer_channel offermsg;
 542         /*
 543          * These are based on the OfferMsg.MonitorId.
 544          * Save it here for easy access.
 545          */
 546         u8 monitor_grp;
 547         u8 monitor_bit;
 548
 549         u32 ringbuffer_gpadlhandle;
 550
 551         /* Allocated memory for ring buffer */
 552         void *ringbuffer_pages;
 553         u32 ringbuffer_pagecount;
 554         struct hv_ring_buffer_info outbound;    /* send to parent */
 555         struct hv_ring_buffer_info inbound;     /* receive from parent */
 556         spinlock_t inbound_lock;
 557         struct workqueue_struct *controlwq;
 558
 559         /* Channel callback are invoked in this workqueue context */
 560         /* HANDLE dataWorkQueue; */
 561
 562         void (*onchannel_callback)(void *context);
 563         void *channel_callback_context;
 564 };
 565
 566 struct vmbus_channel_debug_info {
 567         u32 relid;
 568         enum vmbus_channel_state state;
 569         struct hv_guid interfacetype;
 570         struct hv_guid interface_instance;
 571         u32 monitorid;
 572         u32 servermonitor_pending;
 573         u32 servermonitor_latency;
 574         u32 servermonitor_connectionid;
 575         u32 clientmonitor_pending;
 576         u32 clientmonitor_latency;
 577         u32 clientmonitor_connectionid;
 578
 579         struct hv_ring_buffer_debug_info inbound;
 580         struct hv_ring_buffer_debug_info outbound;
 581 };
 582
 583 /*
 584  * Represents each channel msg on the vmbus connection This is a
 585  * variable-size data structure depending on the msg type itself
 586  */
 587 struct vmbus_channel_msginfo {
 588         /* Bookkeeping stuff */
 589         struct list_head msglistentry;
 590
 591         /* So far, this is only used to handle gpadl body message */
 592         struct list_head submsglist;
 593
 594         /* Synchronize the request/response if needed */
 595         struct completion  waitevent;
 596         union {
 597                 struct vmbus_channel_version_supported version_supported;
 598                 struct vmbus_channel_open_result open_result;
 599                 struct vmbus_channel_gpadl_torndown gpadl_torndown;
 600                 struct vmbus_channel_gpadl_created gpadl_created;
 601                 struct vmbus_channel_version_response version_response;
 602         } response;
 603
 604         u32 msgsize;
 605         /*
 606          * The channel message that goes out on the "wire".
 607          * It will contain at minimum the VMBUS_CHANNEL_MESSAGE_HEADER header
 608          */
 609         unsigned char msg[0];
 610 };
 611
 612
 613 void free_channel(struct vmbus_channel *channel);
 614
 615 void vmbus_onmessage(void *context);
 616
 617 int vmbus_request_offers(void);
 618
 619 /* The format must be the same as struct vmdata_gpa_direct */
 620 struct vmbus_channel_packet_page_buffer {
 621         u16 type;
 622         u16 dataoffset8;
 623         u16 length8;
 624         u16 flags;
 625         u64 transactionid;
 626         u32 reserved;
 627         u32 rangecount;
 628         struct hv_page_buffer range[MAX_PAGE_BUFFER_COUNT];
 629 } __packed;
 630
 631 /* The format must be the same as struct vmdata_gpa_direct */
 632 struct vmbus_channel_packet_multipage_buffer {
 633         u16 type;
 634         u16 dataoffset8;
 635         u16 length8;
 636         u16 flags;
 637         u64 transactionid;
 638         u32 reserved;
 639         u32 rangecount;         /* Always 1 in this case */
 640         struct hv_multipage_buffer range;
 641 } __packed;
 642
 643
 644 extern int vmbus_open(struct vmbus_channel *channel,
 645                             u32 send_ringbuffersize,
 646                             u32 recv_ringbuffersize,
 647                             void *userdata,
 648                             u32 userdatalen,
 649                             void(*onchannel_callback)(void *context),
 650                             void *context);
 651
 652 extern void vmbus_close(struct vmbus_channel *channel);
 653
 654 extern int vmbus_sendpacket(struct vmbus_channel *channel,
 655                                   const void *buffer,
 656                                   u32 bufferLen,
 657                                   u64 requestid,
 658                                   enum vmbus_packet_type type,
 659                                   u32 flags);
 660
 661 extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
 662                                             struct hv_page_buffer pagebuffers[],
 663                                             u32 pagecount,
 664                                             void *buffer,
 665                                             u32 bufferlen,
 666                                             u64 requestid);
 667
 668 extern int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel,
 669                                         struct hv_multipage_buffer *mpb,
 670                                         void *buffer,
 671                                         u32 bufferlen,
 672                                         u64 requestid);
 673
 674 extern int vmbus_establish_gpadl(struct vmbus_channel *channel,
 675                                       void *kbuffer,
 676                                       u32 size,
 677                                       u32 *gpadl_handle);
 678
 679 extern int vmbus_teardown_gpadl(struct vmbus_channel *channel,
 680                                      u32 gpadl_handle);
 681
 682 extern int vmbus_recvpacket(struct vmbus_channel *channel,
 683                                   void *buffer,
 684                                   u32 bufferlen,
 685                                   u32 *buffer_actual_len,
 686                                   u64 *requestid);
 687
 688 extern int vmbus_recvpacket_raw(struct vmbus_channel *channel,
 689                                      void *buffer,
 690                                      u32 bufferlen,
 691                                      u32 *buffer_actual_len,
 692                                      u64 *requestid);
 693
 694
 695 extern void vmbus_get_debug_info(struct vmbus_channel *channel,
 696                                      struct vmbus_channel_debug_info *debug);
 697
 698 extern void vmbus_ontimer(unsigned long data);
 699
 700
 701 #define LOWORD(dw) ((unsigned short)(dw))
 702 #define HIWORD(dw) ((unsigned short)(((unsigned int) (dw) >> 16) & 0xFFFF))
 703
 704
 705 #define VMBUS                           0x0001
 706 #define STORVSC                         0x0002
 707 #define NETVSC                          0x0004
 708 #define INPUTVSC                        0x0008
 709 #define BLKVSC                          0x0010
 710 #define VMBUS_DRV                       0x0100
 711 #define STORVSC_DRV                     0x0200
 712 #define NETVSC_DRV                      0x0400
 713 #define INPUTVSC_DRV            0x0800
 714 #define BLKVSC_DRV                      0x1000
 715
 716 #define ALL_MODULES                     (VMBUS          |\
 717                                                         STORVSC         |\
 718                                                         NETVSC          |\
 719                                                         INPUTVSC        |\
 720                                                         BLKVSC          |\
 721                                                         VMBUS_DRV       |\
 722                                                         STORVSC_DRV     |\
 723                                                         NETVSC_DRV      |\
 724                                                         INPUTVSC_DRV|\
 725                                                         BLKVSC_DRV)
 726
 727 /* Logging Level */
 728 #define ERROR_LVL                               3
 729 #define WARNING_LVL                             4
 730 #define INFO_LVL                                6
 731 #define DEBUG_LVL                               7
 732 #define DEBUG_LVL_ENTEREXIT                     8
 733 #define DEBUG_RING_LVL                          9
 734
 735 extern unsigned int vmbus_loglevel;
 736
 737 #define DPRINT(mod, lvl, fmt, args...) do {\
 738         if ((mod & (HIWORD(vmbus_loglevel))) && \
 739             (lvl <= LOWORD(vmbus_loglevel)))    \
 740                 printk(KERN_DEBUG #mod": %s() " fmt "\n", __func__, ## args);\
 741         } while (0)
 742
 743 #define DPRINT_DBG(mod, fmt, args...) do {\
 744         if ((mod & (HIWORD(vmbus_loglevel))) &&         \
 745             (DEBUG_LVL <= LOWORD(vmbus_loglevel)))      \
 746                 printk(KERN_DEBUG #mod": %s() " fmt "\n", __func__, ## args);\
 747         } while (0)
 748
 749 #define DPRINT_INFO(mod, fmt, args...) do {\
 750         if ((mod & (HIWORD(vmbus_loglevel))) &&         \
 751             (INFO_LVL <= LOWORD(vmbus_loglevel)))       \
 752                 printk(KERN_INFO #mod": " fmt "\n", ## args);\
 753         } while (0)
 754
 755 #define DPRINT_WARN(mod, fmt, args...) do {\
 756         if ((mod & (HIWORD(vmbus_loglevel))) &&         \
 757             (WARNING_LVL <= LOWORD(vmbus_loglevel)))    \
 758                 printk(KERN_WARNING #mod": WARNING! " fmt "\n", ## args);\
 759         } while (0)
 760
 761 #define DPRINT_ERR(mod, fmt, args...) do {\
 762         if ((mod & (HIWORD(vmbus_loglevel))) &&         \
 763             (ERROR_LVL <= LOWORD(vmbus_loglevel)))      \
 764                 printk(KERN_ERR #mod": %s() ERROR!! " fmt "\n", \
 765                        __func__, ## args);\
 766         } while (0)
 767
 768
 769
 770 struct hv_driver;
 771 struct hv_device;
 772
 773 struct hv_dev_port_info {
 774         u32 int_mask;
 775         u32 read_idx;
 776         u32 write_idx;
 777         u32 bytes_avail_toread;
 778         u32 bytes_avail_towrite;
 779 };
 780
 781 struct hv_device_info {
 782         u32 chn_id;
 783         u32 chn_state;
 784         struct hv_guid chn_type;
 785         struct hv_guid chn_instance;
 786
 787         u32 monitor_id;
 788         u32 server_monitor_pending;
 789         u32 server_monitor_latency;
 790         u32 server_monitor_conn_id;
 791         u32 client_monitor_pending;
 792         u32 client_monitor_latency;
 793         u32 client_monitor_conn_id;
 794
 795         struct hv_dev_port_info inbound;
 796         struct hv_dev_port_info outbound;
 797 };
 798
 799 /* Base driver object */
 800 struct hv_driver {
 801         const char *name;
 802
 803         /* the device type supported by this driver */
 804         struct hv_guid dev_type;
 805
 806         struct device_driver driver;
 807
 808         int (*probe)(struct hv_device *);
 809         int (*remove)(struct hv_device *);
 810         void (*shutdown)(struct hv_device *);
 811
 812 };
 813
 814 /* Base device object */
 815 struct hv_device {
 816         /* the device type id of this device */
 817         struct hv_guid dev_type;
 818
 819         /* the device instance id of this device */
 820         struct hv_guid dev_instance;
 821
 822         struct device device;
 823
 824         struct vmbus_channel *channel;
 825
 826         /* Device extension; */
 827         void *ext;
 828 };
 829
 830
 831 static inline struct hv_device *device_to_hv_device(struct device *d)
 832 {
 833         return container_of(d, struct hv_device, device);
 834 }
 835
 836 static inline struct hv_driver *drv_to_hv_drv(struct device_driver *d)
 837 {
 838         return container_of(d, struct hv_driver, driver);
 839 }
 840
 841
 842 /* Vmbus interface */
 843 int vmbus_child_driver_register(struct device_driver *drv);
 844 void vmbus_child_driver_unregister(struct device_driver *drv);
 845
 846 /*
 847  * Common header for Hyper-V ICs
 848  */
 849
 850 #define ICMSGTYPE_NEGOTIATE             0
 851 #define ICMSGTYPE_HEARTBEAT             1
 852 #define ICMSGTYPE_KVPEXCHANGE           2
 853 #define ICMSGTYPE_SHUTDOWN              3
 854 #define ICMSGTYPE_TIMESYNC              4
 855 #define ICMSGTYPE_VSS                   5
 856
 857 #define ICMSGHDRFLAG_TRANSACTION        1
 858 #define ICMSGHDRFLAG_REQUEST            2
 859 #define ICMSGHDRFLAG_RESPONSE           4
 860
 861 #define HV_S_OK                         0x00000000
 862 #define HV_E_FAIL                       0x80004005
 863 #define HV_ERROR_NOT_SUPPORTED          0x80070032
 864 #define HV_ERROR_MACHINE_LOCKED         0x800704F7
 865
 866 struct vmbuspipe_hdr {
 867         u32 flags;
 868         u32 msgsize;
 869 } __packed;
 870
 871 struct ic_version {
 872         u16 major;
 873         u16 minor;
 874 } __packed;
 875
 876 struct icmsg_hdr {
 877         struct ic_version icverframe;
 878         u16 icmsgtype;
 879         struct ic_version icvermsg;
 880         u16 icmsgsize;
 881         u32 status;
 882         u8 ictransaction_id;
 883         u8 icflags;
 884         u8 reserved[2];
 885 } __packed;
 886
 887 struct icmsg_negotiate {
 888         u16 icframe_vercnt;
 889         u16 icmsg_vercnt;
 890         u32 reserved;
 891         struct ic_version icversion_data[1]; /* any size array */
 892 } __packed;
 893
 894 struct shutdown_msg_data {
 895         u32 reason_code;
 896         u32 timeout_seconds;
 897         u32 flags;
 898         u8  display_message[2048];
 899 } __packed;
 900
 901 struct heartbeat_msg_data {
 902         u64 seq_num;
 903         u32 reserved[8];
 904 } __packed;
 905
 906 /* Time Sync IC defs */
 907 #define ICTIMESYNCFLAG_PROBE    0
 908 #define ICTIMESYNCFLAG_SYNC     1
 909 #define ICTIMESYNCFLAG_SAMPLE   2
 910
 911 #ifdef __x86_64__
 912 #define WLTIMEDELTA     116444736000000000L     /* in 100ns unit */
 913 #else
 914 #define WLTIMEDELTA     116444736000000000LL
 915 #endif
 916
 917 struct ictimesync_data {
 918         u64 parenttime;
 919         u64 childtime;
 920         u64 roundtriptime;
 921         u8 flags;
 922 } __packed;
 923
 924 /* Index for each IC struct in array hv_cb_utils[] */
 925 #define HV_SHUTDOWN_MSG         0
 926 #define HV_TIMESYNC_MSG         1
 927 #define HV_HEARTBEAT_MSG        2
 928 #define HV_KVP_MSG              3
 929
 930 struct hyperv_service_callback {
 931         u8 msg_type;
 932         char *log_msg;
 933         unsigned char data[16];
 934         struct vmbus_channel *channel;
 935         void (*callback) (void *context);
 936 };
 937
 938 extern void prep_negotiate_resp(struct icmsg_hdr *,
 939                                 struct icmsg_negotiate *, u8 *);
 940 extern void chn_cb_negotiate(void *);
 941 extern struct hyperv_service_callback hv_cb_utils[];
 942
 943 #endif /* _HYPERV_H */