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/uuid.h>
  31 #include <linux/timer.h>
  32 #include <linux/workqueue.h>
  33 #include <linux/completion.h>
  34 #include <linux/device.h>
  35 #include <linux/mod_devicetable.h>
  36
  37
  38 #include <asm/hyperv.h>
  39
  40
  41 #define MAX_PAGE_BUFFER_COUNT                           16
  42 #define MAX_MULTIPAGE_BUFFER_COUNT                      32 /* 128K */
  43
  44 #pragma pack(push, 1)
  45
  46 /* Single-page buffer */
  47 struct hv_page_buffer {
  48         u32 len;
  49         u32 offset;
  50         u64 pfn;
  51 };
  52
  53 /* Multiple-page buffer */
  54 struct hv_multipage_buffer {
  55         /* Length and Offset determines the # of pfns in the array */
  56         u32 len;
  57         u32 offset;
  58         u64 pfn_array[MAX_MULTIPAGE_BUFFER_COUNT];
  59 };
  60
  61 /* 0x18 includes the proprietary packet header */
  62 #define MAX_PAGE_BUFFER_PACKET          (0x18 +                 \
  63                                         (sizeof(struct hv_page_buffer) * \
  64                                          MAX_PAGE_BUFFER_COUNT))
  65 #define MAX_MULTIPAGE_BUFFER_PACKET     (0x18 +                 \
  66                                          sizeof(struct hv_multipage_buffer))
  67
  68
  69 #pragma pack(pop)
  70
  71 struct hv_ring_buffer {
  72         /* Offset in bytes from the start of ring data below */
  73         u32 write_index;
  74
  75         /* Offset in bytes from the start of ring data below */
  76         u32 read_index;
  77
  78         u32 interrupt_mask;
  79
  80         /* Pad it to PAGE_SIZE so that data starts on page boundary */
  81         u8      reserved[4084];
  82
  83         /* NOTE:
  84          * The interrupt_mask field is used only for channels but since our
  85          * vmbus connection also uses this data structure and its data starts
  86          * here, we commented out this field.
  87          */
  88
  89         /*
  90          * Ring data starts here + RingDataStartOffset
  91          * !!! DO NOT place any fields below this !!!
  92          */
  93         u8 buffer[0];
  94 } __packed;
  95
  96 struct hv_ring_buffer_info {
  97         struct hv_ring_buffer *ring_buffer;
  98         u32 ring_size;                  /* Include the shared header */
  99         spinlock_t ring_lock;
 100
 101         u32 ring_datasize;              /* < ring_size */
 102         u32 ring_data_startoffset;
 103 };
 104
 105 struct hv_ring_buffer_debug_info {
 106         u32 current_interrupt_mask;
 107         u32 current_read_index;
 108         u32 current_write_index;
 109         u32 bytes_avail_toread;
 110         u32 bytes_avail_towrite;
 111 };
 112
 113 /*
 114  * We use the same version numbering for all Hyper-V modules.
 115  *
 116  * Definition of versioning is as follows;
 117  *
 118  *      Major Number    Changes for these scenarios;
 119  *                      1.      When a new version of Windows Hyper-V
 120  *                              is released.
 121  *                      2.      A Major change has occurred in the
 122  *                              Linux IC's.
 123  *                      (For example the merge for the first time
 124  *                      into the kernel) Every time the Major Number
 125  *                      changes, the Revision number is reset to 0.
 126  *      Minor Number    Changes when new functionality is added
 127  *                      to the Linux IC's that is not a bug fix.
 128  *
 129  * 3.1 - Added completed hv_utils driver. Shutdown/Heartbeat/Timesync
 130  */
 131 #define HV_DRV_VERSION           "3.1"
 132
 133
 134 /*
 135  * A revision number of vmbus that is used for ensuring both ends on a
 136  * partition are using compatible versions.
 137  */
 138 #define VMBUS_REVISION_NUMBER           13
 139
 140 /* Make maximum size of pipe payload of 16K */
 141 #define MAX_PIPE_DATA_PAYLOAD           (sizeof(u8) * 16384)
 142
 143 /* Define PipeMode values. */
 144 #define VMBUS_PIPE_TYPE_BYTE            0x00000000
 145 #define VMBUS_PIPE_TYPE_MESSAGE         0x00000004
 146
 147 /* The size of the user defined data buffer for non-pipe offers. */
 148 #define MAX_USER_DEFINED_BYTES          120
 149
 150 /* The size of the user defined data buffer for pipe offers. */
 151 #define MAX_PIPE_USER_DEFINED_BYTES     116
 152
 153 /*
 154  * At the center of the Channel Management library is the Channel Offer. This
 155  * struct contains the fundamental information about an offer.
 156  */
 157 struct vmbus_channel_offer {
 158         uuid_le if_type;
 159         uuid_le if_instance;
 160         u64 int_latency; /* in 100ns units */
 161         u32 if_revision;
 162         u32 server_ctx_size;    /* in bytes */
 163         u16 chn_flags;
 164         u16 mmio_megabytes;             /* in bytes * 1024 * 1024 */
 165
 166         union {
 167                 /* Non-pipes: The user has MAX_USER_DEFINED_BYTES bytes. */
 168                 struct {
 169                         unsigned char user_def[MAX_USER_DEFINED_BYTES];
 170                 } std;
 171
 172                 /*
 173                  * Pipes:
 174                  * The following sructure is an integrated pipe protocol, which
 175                  * is implemented on top of standard user-defined data. Pipe
 176                  * clients have MAX_PIPE_USER_DEFINED_BYTES left for their own
 177                  * use.
 178                  */
 179                 struct {
 180                         u32  pipe_mode;
 181                         unsigned char user_def[MAX_PIPE_USER_DEFINED_BYTES];
 182                 } pipe;
 183         } u;
 184         u32 padding;
 185 } __packed;
 186
 187 /* Server Flags */
 188 #define VMBUS_CHANNEL_ENUMERATE_DEVICE_INTERFACE        1
 189 #define VMBUS_CHANNEL_SERVER_SUPPORTS_TRANSFER_PAGES    2
 190 #define VMBUS_CHANNEL_SERVER_SUPPORTS_GPADLS            4
 191 #define VMBUS_CHANNEL_NAMED_PIPE_MODE                   0x10
 192 #define VMBUS_CHANNEL_LOOPBACK_OFFER                    0x100
 193 #define VMBUS_CHANNEL_PARENT_OFFER                      0x200
 194 #define VMBUS_CHANNEL_REQUEST_MONITORED_NOTIFICATION    0x400
 195
 196 struct vmpacket_descriptor {
 197         u16 type;
 198         u16 offset8;
 199         u16 len8;
 200         u16 flags;
 201         u64 trans_id;
 202 } __packed;
 203
 204 struct vmpacket_header {
 205         u32 prev_pkt_start_offset;
 206         struct vmpacket_descriptor descriptor;
 207 } __packed;
 208
 209 struct vmtransfer_page_range {
 210         u32 byte_count;
 211         u32 byte_offset;
 212 } __packed;
 213
 214 struct vmtransfer_page_packet_header {
 215         struct vmpacket_descriptor d;
 216         u16 xfer_pageset_id;
 217         bool sender_owns_set;
 218         u8 reserved;
 219         u32 range_cnt;
 220         struct vmtransfer_page_range ranges[1];
 221 } __packed;
 222
 223 struct vmgpadl_packet_header {
 224         struct vmpacket_descriptor d;
 225         u32 gpadl;
 226         u32 reserved;
 227 } __packed;
 228
 229 struct vmadd_remove_transfer_page_set {
 230         struct vmpacket_descriptor d;
 231         u32 gpadl;
 232         u16 xfer_pageset_id;
 233         u16 reserved;
 234 } __packed;
 235
 236 /*
 237  * This structure defines a range in guest physical space that can be made to
 238  * look virtually contiguous.
 239  */
 240 struct gpa_range {
 241         u32 byte_count;
 242         u32 byte_offset;
 243         u64 pfn_array[0];
 244 };
 245
 246 /*
 247  * This is the format for an Establish Gpadl packet, which contains a handle by
 248  * which this GPADL will be known and a set of GPA ranges associated with it.
 249  * This can be converted to a MDL by the guest OS.  If there are multiple GPA
 250  * ranges, then the resulting MDL will be "chained," representing multiple VA
 251  * ranges.
 252  */
 253 struct vmestablish_gpadl {
 254         struct vmpacket_descriptor d;
 255         u32 gpadl;
 256         u32 range_cnt;
 257         struct gpa_range range[1];
 258 } __packed;
 259
 260 /*
 261  * This is the format for a Teardown Gpadl packet, which indicates that the
 262  * GPADL handle in the Establish Gpadl packet will never be referenced again.
 263  */
 264 struct vmteardown_gpadl {
 265         struct vmpacket_descriptor d;
 266         u32 gpadl;
 267         u32 reserved;   /* for alignment to a 8-byte boundary */
 268 } __packed;
 269
 270 /*
 271  * This is the format for a GPA-Direct packet, which contains a set of GPA
 272  * ranges, in addition to commands and/or data.
 273  */
 274 struct vmdata_gpa_direct {
 275         struct vmpacket_descriptor d;
 276         u32 reserved;
 277         u32 range_cnt;
 278         struct gpa_range range[1];
 279 } __packed;
 280
 281 /* This is the format for a Additional Data Packet. */
 282 struct vmadditional_data {
 283         struct vmpacket_descriptor d;
 284         u64 total_bytes;
 285         u32 offset;
 286         u32 byte_cnt;
 287         unsigned char data[1];
 288 } __packed;
 289
 290 union vmpacket_largest_possible_header {
 291         struct vmpacket_descriptor simple_hdr;
 292         struct vmtransfer_page_packet_header xfer_page_hdr;
 293         struct vmgpadl_packet_header gpadl_hdr;
 294         struct vmadd_remove_transfer_page_set add_rm_xfer_page_hdr;
 295         struct vmestablish_gpadl establish_gpadl_hdr;
 296         struct vmteardown_gpadl teardown_gpadl_hdr;
 297         struct vmdata_gpa_direct data_gpa_direct_hdr;
 298 };
 299
 300 #define VMPACKET_DATA_START_ADDRESS(__packet)   \
 301         (void *)(((unsigned char *)__packet) +  \
 302          ((struct vmpacket_descriptor)__packet)->offset8 * 8)
 303
 304 #define VMPACKET_DATA_LENGTH(__packet)          \
 305         ((((struct vmpacket_descriptor)__packet)->len8 -        \
 306           ((struct vmpacket_descriptor)__packet)->offset8) * 8)
 307
 308 #define VMPACKET_TRANSFER_MODE(__packet)        \
 309         (((struct IMPACT)__packet)->type)
 310
 311 enum vmbus_packet_type {
 312         VM_PKT_INVALID                          = 0x0,
 313         VM_PKT_SYNCH                            = 0x1,
 314         VM_PKT_ADD_XFER_PAGESET                 = 0x2,
 315         VM_PKT_RM_XFER_PAGESET                  = 0x3,
 316         VM_PKT_ESTABLISH_GPADL                  = 0x4,
 317         VM_PKT_TEARDOWN_GPADL                   = 0x5,
 318         VM_PKT_DATA_INBAND                      = 0x6,
 319         VM_PKT_DATA_USING_XFER_PAGES            = 0x7,
 320         VM_PKT_DATA_USING_GPADL                 = 0x8,
 321         VM_PKT_DATA_USING_GPA_DIRECT            = 0x9,
 322         VM_PKT_CANCEL_REQUEST                   = 0xa,
 323         VM_PKT_COMP                             = 0xb,
 324         VM_PKT_DATA_USING_ADDITIONAL_PKT        = 0xc,
 325         VM_PKT_ADDITIONAL_DATA                  = 0xd
 326 };
 327
 328 #define VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED     1
 329
 330
 331 /* Version 1 messages */
 332 enum vmbus_channel_message_type {
 333         CHANNELMSG_INVALID                      =  0,
 334         CHANNELMSG_OFFERCHANNEL         =  1,
 335         CHANNELMSG_RESCIND_CHANNELOFFER =  2,
 336         CHANNELMSG_REQUESTOFFERS                =  3,
 337         CHANNELMSG_ALLOFFERS_DELIVERED  =  4,
 338         CHANNELMSG_OPENCHANNEL          =  5,
 339         CHANNELMSG_OPENCHANNEL_RESULT           =  6,
 340         CHANNELMSG_CLOSECHANNEL         =  7,
 341         CHANNELMSG_GPADL_HEADER         =  8,
 342         CHANNELMSG_GPADL_BODY                   =  9,
 343         CHANNELMSG_GPADL_CREATED                = 10,
 344         CHANNELMSG_GPADL_TEARDOWN               = 11,
 345         CHANNELMSG_GPADL_TORNDOWN               = 12,
 346         CHANNELMSG_RELID_RELEASED               = 13,
 347         CHANNELMSG_INITIATE_CONTACT             = 14,
 348         CHANNELMSG_VERSION_RESPONSE             = 15,
 349         CHANNELMSG_UNLOAD                       = 16,
 350 #ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
 351         CHANNELMSG_VIEWRANGE_ADD                = 17,
 352         CHANNELMSG_VIEWRANGE_REMOVE             = 18,
 353 #endif
 354         CHANNELMSG_COUNT
 355 };
 356
 357 struct vmbus_channel_message_header {
 358         enum vmbus_channel_message_type msgtype;
 359         u32 padding;
 360 } __packed;
 361
 362 /* Query VMBus Version parameters */
 363 struct vmbus_channel_query_vmbus_version {
 364         struct vmbus_channel_message_header header;
 365         u32 version;
 366 } __packed;
 367
 368 /* VMBus Version Supported parameters */
 369 struct vmbus_channel_version_supported {
 370         struct vmbus_channel_message_header header;
 371         bool version_supported;
 372 } __packed;
 373
 374 /* Offer Channel parameters */
 375 struct vmbus_channel_offer_channel {
 376         struct vmbus_channel_message_header header;
 377         struct vmbus_channel_offer offer;
 378         u32 child_relid;
 379         u8 monitorid;
 380         bool monitor_allocated;
 381 } __packed;
 382
 383 /* Rescind Offer parameters */
 384 struct vmbus_channel_rescind_offer {
 385         struct vmbus_channel_message_header header;
 386         u32 child_relid;
 387 } __packed;
 388
 389 /*
 390  * Request Offer -- no parameters, SynIC message contains the partition ID
 391  * Set Snoop -- no parameters, SynIC message contains the partition ID
 392  * Clear Snoop -- no parameters, SynIC message contains the partition ID
 393  * All Offers Delivered -- no parameters, SynIC message contains the partition
 394  *                         ID
 395  * Flush Client -- no parameters, SynIC message contains the partition ID
 396  */
 397
 398 /* Open Channel parameters */
 399 struct vmbus_channel_open_channel {
 400         struct vmbus_channel_message_header header;
 401
 402         /* Identifies the specific VMBus channel that is being opened. */
 403         u32 child_relid;
 404
 405         /* ID making a particular open request at a channel offer unique. */
 406         u32 openid;
 407
 408         /* GPADL for the channel's ring buffer. */
 409         u32 ringbuffer_gpadlhandle;
 410
 411         /* GPADL for the channel's server context save area. */
 412         u32 server_contextarea_gpadlhandle;
 413
 414         /*
 415         * The upstream ring buffer begins at offset zero in the memory
 416         * described by RingBufferGpadlHandle. The downstream ring buffer
 417         * follows it at this offset (in pages).
 418         */
 419         u32 downstream_ringbuffer_pageoffset;
 420
 421         /* User-specific data to be passed along to the server endpoint. */
 422         unsigned char userdata[MAX_USER_DEFINED_BYTES];
 423 } __packed;
 424
 425 /* Open Channel Result parameters */
 426 struct vmbus_channel_open_result {
 427         struct vmbus_channel_message_header header;
 428         u32 child_relid;
 429         u32 openid;
 430         u32 status;
 431 } __packed;
 432
 433 /* Close channel parameters; */
 434 struct vmbus_channel_close_channel {
 435         struct vmbus_channel_message_header header;
 436         u32 child_relid;
 437 } __packed;
 438
 439 /* Channel Message GPADL */
 440 #define GPADL_TYPE_RING_BUFFER          1
 441 #define GPADL_TYPE_SERVER_SAVE_AREA     2
 442 #define GPADL_TYPE_TRANSACTION          8
 443
 444 /*
 445  * The number of PFNs in a GPADL message is defined by the number of
 446  * pages that would be spanned by ByteCount and ByteOffset.  If the
 447  * implied number of PFNs won't fit in this packet, there will be a
 448  * follow-up packet that contains more.
 449  */
 450 struct vmbus_channel_gpadl_header {
 451         struct vmbus_channel_message_header header;
 452         u32 child_relid;
 453         u32 gpadl;
 454         u16 range_buflen;
 455         u16 rangecount;
 456         struct gpa_range range[0];
 457 } __packed;
 458
 459 /* This is the followup packet that contains more PFNs. */
 460 struct vmbus_channel_gpadl_body {
 461         struct vmbus_channel_message_header header;
 462         u32 msgnumber;
 463         u32 gpadl;
 464         u64 pfn[0];
 465 } __packed;
 466
 467 struct vmbus_channel_gpadl_created {
 468         struct vmbus_channel_message_header header;
 469         u32 child_relid;
 470         u32 gpadl;
 471         u32 creation_status;
 472 } __packed;
 473
 474 struct vmbus_channel_gpadl_teardown {
 475         struct vmbus_channel_message_header header;
 476         u32 child_relid;
 477         u32 gpadl;
 478 } __packed;
 479
 480 struct vmbus_channel_gpadl_torndown {
 481         struct vmbus_channel_message_header header;
 482         u32 gpadl;
 483 } __packed;
 484
 485 #ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
 486 struct vmbus_channel_view_range_add {
 487         struct vmbus_channel_message_header header;
 488         PHYSICAL_ADDRESS viewrange_base;
 489         u64 viewrange_length;
 490         u32 child_relid;
 491 } __packed;
 492
 493 struct vmbus_channel_view_range_remove {
 494         struct vmbus_channel_message_header header;
 495         PHYSICAL_ADDRESS viewrange_base;
 496         u32 child_relid;
 497 } __packed;
 498 #endif
 499
 500 struct vmbus_channel_relid_released {
 501         struct vmbus_channel_message_header header;
 502         u32 child_relid;
 503 } __packed;
 504
 505 struct vmbus_channel_initiate_contact {
 506         struct vmbus_channel_message_header header;
 507         u32 vmbus_version_requested;
 508         u32 padding2;
 509         u64 interrupt_page;
 510         u64 monitor_page1;
 511         u64 monitor_page2;
 512 } __packed;
 513
 514 struct vmbus_channel_version_response {
 515         struct vmbus_channel_message_header header;
 516         bool version_supported;
 517 } __packed;
 518
 519 enum vmbus_channel_state {
 520         CHANNEL_OFFER_STATE,
 521         CHANNEL_OPENING_STATE,
 522         CHANNEL_OPEN_STATE,
 523 };
 524
 525 struct vmbus_channel_debug_info {
 526         u32 relid;
 527         enum vmbus_channel_state state;
 528         uuid_le interfacetype;
 529         uuid_le interface_instance;
 530         u32 monitorid;
 531         u32 servermonitor_pending;
 532         u32 servermonitor_latency;
 533         u32 servermonitor_connectionid;
 534         u32 clientmonitor_pending;
 535         u32 clientmonitor_latency;
 536         u32 clientmonitor_connectionid;
 537
 538         struct hv_ring_buffer_debug_info inbound;
 539         struct hv_ring_buffer_debug_info outbound;
 540 };
 541
 542 /*
 543  * Represents each channel msg on the vmbus connection This is a
 544  * variable-size data structure depending on the msg type itself
 545  */
 546 struct vmbus_channel_msginfo {
 547         /* Bookkeeping stuff */
 548         struct list_head msglistentry;
 549
 550         /* So far, this is only used to handle gpadl body message */
 551         struct list_head submsglist;
 552
 553         /* Synchronize the request/response if needed */
 554         struct completion  waitevent;
 555         union {
 556                 struct vmbus_channel_version_supported version_supported;
 557                 struct vmbus_channel_open_result open_result;
 558                 struct vmbus_channel_gpadl_torndown gpadl_torndown;
 559                 struct vmbus_channel_gpadl_created gpadl_created;
 560                 struct vmbus_channel_version_response version_response;
 561         } response;
 562
 563         u32 msgsize;
 564         /*
 565          * The channel message that goes out on the "wire".
 566          * It will contain at minimum the VMBUS_CHANNEL_MESSAGE_HEADER header
 567          */
 568         unsigned char msg[0];
 569 };
 570
 571 struct vmbus_close_msg {
 572         struct vmbus_channel_msginfo info;
 573         struct vmbus_channel_close_channel msg;
 574 };
 575
 576 struct vmbus_channel {
 577         struct list_head listentry;
 578
 579         struct hv_device *device_obj;
 580
 581         struct work_struct work;
 582
 583         enum vmbus_channel_state state;
 584         /*
 585          * For util channels, stash the
 586          * the service index for easy access.
 587          */
 588         s8 util_index;
 589
 590         struct vmbus_channel_offer_channel offermsg;
 591         /*
 592          * These are based on the OfferMsg.MonitorId.
 593          * Save it here for easy access.
 594          */
 595         u8 monitor_grp;
 596         u8 monitor_bit;
 597
 598         u32 ringbuffer_gpadlhandle;
 599
 600         /* Allocated memory for ring buffer */
 601         void *ringbuffer_pages;
 602         u32 ringbuffer_pagecount;
 603         struct hv_ring_buffer_info outbound;    /* send to parent */
 604         struct hv_ring_buffer_info inbound;     /* receive from parent */
 605         spinlock_t inbound_lock;
 606         struct workqueue_struct *controlwq;
 607
 608         struct vmbus_close_msg close_msg;
 609
 610         /* Channel callback are invoked in this workqueue context */
 611         /* HANDLE dataWorkQueue; */
 612
 613         void (*onchannel_callback)(void *context);
 614         void *channel_callback_context;
 615 };
 616
 617 void free_channel(struct vmbus_channel *channel);
 618
 619 void vmbus_onmessage(void *context);
 620
 621 int vmbus_request_offers(void);
 622
 623 /* The format must be the same as struct vmdata_gpa_direct */
 624 struct vmbus_channel_packet_page_buffer {
 625         u16 type;
 626         u16 dataoffset8;
 627         u16 length8;
 628         u16 flags;
 629         u64 transactionid;
 630         u32 reserved;
 631         u32 rangecount;
 632         struct hv_page_buffer range[MAX_PAGE_BUFFER_COUNT];
 633 } __packed;
 634
 635 /* The format must be the same as struct vmdata_gpa_direct */
 636 struct vmbus_channel_packet_multipage_buffer {
 637         u16 type;
 638         u16 dataoffset8;
 639         u16 length8;
 640         u16 flags;
 641         u64 transactionid;
 642         u32 reserved;
 643         u32 rangecount;         /* Always 1 in this case */
 644         struct hv_multipage_buffer range;
 645 } __packed;
 646
 647
 648 extern int vmbus_open(struct vmbus_channel *channel,
 649                             u32 send_ringbuffersize,
 650                             u32 recv_ringbuffersize,
 651                             void *userdata,
 652                             u32 userdatalen,
 653                             void(*onchannel_callback)(void *context),
 654                             void *context);
 655
 656 extern void vmbus_close(struct vmbus_channel *channel);
 657
 658 extern int vmbus_sendpacket(struct vmbus_channel *channel,
 659                                   const void *buffer,
 660                                   u32 bufferLen,
 661                                   u64 requestid,
 662                                   enum vmbus_packet_type type,
 663                                   u32 flags);
 664
 665 extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
 666                                             struct hv_page_buffer pagebuffers[],
 667                                             u32 pagecount,
 668                                             void *buffer,
 669                                             u32 bufferlen,
 670                                             u64 requestid);
 671
 672 extern int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel,
 673                                         struct hv_multipage_buffer *mpb,
 674                                         void *buffer,
 675                                         u32 bufferlen,
 676                                         u64 requestid);
 677
 678 extern int vmbus_establish_gpadl(struct vmbus_channel *channel,
 679                                       void *kbuffer,
 680                                       u32 size,
 681                                       u32 *gpadl_handle);
 682
 683 extern int vmbus_teardown_gpadl(struct vmbus_channel *channel,
 684                                      u32 gpadl_handle);
 685
 686 extern int vmbus_recvpacket(struct vmbus_channel *channel,
 687                                   void *buffer,
 688                                   u32 bufferlen,
 689                                   u32 *buffer_actual_len,
 690                                   u64 *requestid);
 691
 692 extern int vmbus_recvpacket_raw(struct vmbus_channel *channel,
 693                                      void *buffer,
 694                                      u32 bufferlen,
 695                                      u32 *buffer_actual_len,
 696                                      u64 *requestid);
 697
 698
 699 extern void vmbus_get_debug_info(struct vmbus_channel *channel,
 700                                      struct vmbus_channel_debug_info *debug);
 701
 702 extern void vmbus_ontimer(unsigned long data);
 703
 704
 705 #define LOWORD(dw) ((unsigned short)(dw))
 706 #define HIWORD(dw) ((unsigned short)(((unsigned int) (dw) >> 16) & 0xFFFF))
 707
 708
 709 #define VMBUS                           0x0001
 710 #define STORVSC                         0x0002
 711 #define NETVSC                          0x0004
 712 #define INPUTVSC                        0x0008
 713 #define BLKVSC                          0x0010
 714 #define VMBUS_DRV                       0x0100
 715 #define STORVSC_DRV                     0x0200
 716 #define NETVSC_DRV                      0x0400
 717 #define INPUTVSC_DRV            0x0800
 718 #define BLKVSC_DRV                      0x1000
 719
 720 #define ALL_MODULES                     (VMBUS          |\
 721                                                         STORVSC         |\
 722                                                         NETVSC          |\
 723                                                         INPUTVSC        |\
 724                                                         BLKVSC          |\
 725                                                         VMBUS_DRV       |\
 726                                                         STORVSC_DRV     |\
 727                                                         NETVSC_DRV      |\
 728                                                         INPUTVSC_DRV|\
 729                                                         BLKVSC_DRV)
 730
 731 /* Logging Level */
 732 #define ERROR_LVL                               3
 733 #define WARNING_LVL                             4
 734 #define INFO_LVL                                6
 735 #define DEBUG_LVL                               7
 736 #define DEBUG_LVL_ENTEREXIT                     8
 737 #define DEBUG_RING_LVL                          9
 738
 739 extern unsigned int vmbus_loglevel;
 740
 741 #define DPRINT(mod, lvl, fmt, args...) do {\
 742         if ((mod & (HIWORD(vmbus_loglevel))) && \
 743             (lvl <= LOWORD(vmbus_loglevel)))    \
 744                 printk(KERN_DEBUG #mod": %s() " fmt "\n", __func__, ## args);\
 745         } while (0)
 746
 747 #define DPRINT_DBG(mod, fmt, args...) do {\
 748         if ((mod & (HIWORD(vmbus_loglevel))) &&         \
 749             (DEBUG_LVL <= LOWORD(vmbus_loglevel)))      \
 750                 printk(KERN_DEBUG #mod": %s() " fmt "\n", __func__, ## args);\
 751         } while (0)
 752
 753 #define DPRINT_INFO(mod, fmt, args...) do {\
 754         if ((mod & (HIWORD(vmbus_loglevel))) &&         \
 755             (INFO_LVL <= LOWORD(vmbus_loglevel)))       \
 756                 printk(KERN_INFO #mod": " fmt "\n", ## args);\
 757         } while (0)
 758
 759 #define DPRINT_WARN(mod, fmt, args...) do {\
 760         if ((mod & (HIWORD(vmbus_loglevel))) &&         \
 761             (WARNING_LVL <= LOWORD(vmbus_loglevel)))    \
 762                 printk(KERN_WARNING #mod": WARNING! " fmt "\n", ## args);\
 763         } while (0)
 764
 765 #define DPRINT_ERR(mod, fmt, args...) do {\
 766         if ((mod & (HIWORD(vmbus_loglevel))) &&         \
 767             (ERROR_LVL <= LOWORD(vmbus_loglevel)))      \
 768                 printk(KERN_ERR #mod": %s() ERROR!! " fmt "\n", \
 769                        __func__, ## args);\
 770         } while (0)
 771
 772
 773
 774 struct hv_driver;
 775 struct hv_device;
 776
 777 struct hv_dev_port_info {
 778         u32 int_mask;
 779         u32 read_idx;
 780         u32 write_idx;
 781         u32 bytes_avail_toread;
 782         u32 bytes_avail_towrite;
 783 };
 784
 785 struct hv_device_info {
 786         u32 chn_id;
 787         u32 chn_state;
 788         uuid_le chn_type;
 789         uuid_le chn_instance;
 790
 791         u32 monitor_id;
 792         u32 server_monitor_pending;
 793         u32 server_monitor_latency;
 794         u32 server_monitor_conn_id;
 795         u32 client_monitor_pending;
 796         u32 client_monitor_latency;
 797         u32 client_monitor_conn_id;
 798
 799         struct hv_dev_port_info inbound;
 800         struct hv_dev_port_info outbound;
 801 };
 802
 803 /* Base driver object */
 804 struct hv_driver {
 805         const char *name;
 806
 807         /* the device type supported by this driver */
 808         uuid_le dev_type;
 809         const struct hv_vmbus_device_id *id_table;
 810
 811         struct device_driver driver;
 812
 813         int (*probe)(struct hv_device *, const struct hv_vmbus_device_id *);
 814         int (*remove)(struct hv_device *);
 815         void (*shutdown)(struct hv_device *);
 816
 817 };
 818
 819 /* Base device object */
 820 struct hv_device {
 821         /* the device type id of this device */
 822         uuid_le dev_type;
 823
 824         /* the device instance id of this device */
 825         uuid_le dev_instance;
 826
 827         struct device device;
 828
 829         struct vmbus_channel *channel;
 830 };
 831
 832
 833 static inline struct hv_device *device_to_hv_device(struct device *d)
 834 {
 835         return container_of(d, struct hv_device, device);
 836 }
 837
 838 static inline struct hv_driver *drv_to_hv_drv(struct device_driver *d)
 839 {
 840         return container_of(d, struct hv_driver, driver);
 841 }
 842
 843 static inline void hv_set_drvdata(struct hv_device *dev, void *data)
 844 {
 845         dev_set_drvdata(&dev->device, data);
 846 }
 847
 848 static inline void *hv_get_drvdata(struct hv_device *dev)
 849 {
 850         return dev_get_drvdata(&dev->device);
 851 }
 852
 853 /* Vmbus interface */
 854 #define vmbus_driver_register(driver)   \
 855         __vmbus_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
 856 int __must_check __vmbus_driver_register(struct hv_driver *hv_driver,
 857                                          struct module *owner,
 858                                          const char *mod_name);
 859 void vmbus_driver_unregister(struct hv_driver *hv_driver);
 860
 861 /**
 862  * VMBUS_DEVICE - macro used to describe a specific hyperv vmbus device
 863  *
 864  * This macro is used to create a struct hv_vmbus_device_id that matches a
 865  * specific device.
 866  */
 867 #define VMBUS_DEVICE(g0, g1, g2, g3, g4, g5, g6, g7,    \
 868                      g8, g9, ga, gb, gc, gd, ge, gf)    \
 869         .guid = { g0, g1, g2, g3, g4, g5, g6, g7,       \
 870                   g8, g9, ga, gb, gc, gd, ge, gf },
 871
 872 /*
 873  * Common header for Hyper-V ICs
 874  */
 875
 876 #define ICMSGTYPE_NEGOTIATE             0
 877 #define ICMSGTYPE_HEARTBEAT             1
 878 #define ICMSGTYPE_KVPEXCHANGE           2
 879 #define ICMSGTYPE_SHUTDOWN              3
 880 #define ICMSGTYPE_TIMESYNC              4
 881 #define ICMSGTYPE_VSS                   5
 882
 883 #define ICMSGHDRFLAG_TRANSACTION        1
 884 #define ICMSGHDRFLAG_REQUEST            2
 885 #define ICMSGHDRFLAG_RESPONSE           4
 886
 887 #define HV_S_OK                         0x00000000
 888 #define HV_E_FAIL                       0x80004005
 889 #define HV_ERROR_NOT_SUPPORTED          0x80070032
 890 #define HV_ERROR_MACHINE_LOCKED         0x800704F7
 891
 892 struct vmbuspipe_hdr {
 893         u32 flags;
 894         u32 msgsize;
 895 } __packed;
 896
 897 struct ic_version {
 898         u16 major;
 899         u16 minor;
 900 } __packed;
 901
 902 struct icmsg_hdr {
 903         struct ic_version icverframe;
 904         u16 icmsgtype;
 905         struct ic_version icvermsg;
 906         u16 icmsgsize;
 907         u32 status;
 908         u8 ictransaction_id;
 909         u8 icflags;
 910         u8 reserved[2];
 911 } __packed;
 912
 913 struct icmsg_negotiate {
 914         u16 icframe_vercnt;
 915         u16 icmsg_vercnt;
 916         u32 reserved;
 917         struct ic_version icversion_data[1]; /* any size array */
 918 } __packed;
 919
 920 struct shutdown_msg_data {
 921         u32 reason_code;
 922         u32 timeout_seconds;
 923         u32 flags;
 924         u8  display_message[2048];
 925 } __packed;
 926
 927 struct heartbeat_msg_data {
 928         u64 seq_num;
 929         u32 reserved[8];
 930 } __packed;
 931
 932 /* Time Sync IC defs */
 933 #define ICTIMESYNCFLAG_PROBE    0
 934 #define ICTIMESYNCFLAG_SYNC     1
 935 #define ICTIMESYNCFLAG_SAMPLE   2
 936
 937 #ifdef __x86_64__
 938 #define WLTIMEDELTA     116444736000000000L     /* in 100ns unit */
 939 #else
 940 #define WLTIMEDELTA     116444736000000000LL
 941 #endif
 942
 943 struct ictimesync_data {
 944         u64 parenttime;
 945         u64 childtime;
 946         u64 roundtriptime;
 947         u8 flags;
 948 } __packed;
 949
 950 /* Index for each IC struct in array hv_cb_utils[] */
 951 #define HV_SHUTDOWN_MSG         0
 952 #define HV_TIMESYNC_MSG         1
 953 #define HV_HEARTBEAT_MSG        2
 954 #define HV_KVP_MSG              3
 955
 956 struct hyperv_service_callback {
 957         u8 msg_type;
 958         char *log_msg;
 959         uuid_le data;
 960         struct vmbus_channel *channel;
 961         void (*callback) (void *context);
 962 };
 963
 964 extern void prep_negotiate_resp(struct icmsg_hdr *,
 965                                 struct icmsg_negotiate *, u8 *);
 966 extern void chn_cb_negotiate(void *);
 967 extern struct hyperv_service_callback hv_cb_utils[];
 968
 969 #endif /* _HYPERV_H */