Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 | /* SPDX-License-Identifier: GPL-2.0-only */ /* * * Copyright (c) 2011, Microsoft Corporation. * * Authors: * Haiyang Zhang <haiyangz@microsoft.com> * Hank Janssen <hjanssen@microsoft.com> * K. Y. Srinivasan <kys@microsoft.com> */ #ifndef _HYPERV_H #define _HYPERV_H #include <uapi/linux/hyperv.h> #include <linux/mm.h> #include <linux/types.h> #include <linux/scatterlist.h> #include <linux/list.h> #include <linux/timer.h> #include <linux/completion.h> #include <linux/device.h> #include <linux/mod_devicetable.h> #include <linux/interrupt.h> #include <linux/reciprocal_div.h> #include <asm/hyperv-tlfs.h> #define MAX_PAGE_BUFFER_COUNT 32 #define MAX_MULTIPAGE_BUFFER_COUNT 32 /* 128K */ #pragma pack(push, 1) /* * Types for GPADL, decides is how GPADL header is created. * * It doesn't make much difference between BUFFER and RING if PAGE_SIZE is the * same as HV_HYP_PAGE_SIZE. * * If PAGE_SIZE is bigger than HV_HYP_PAGE_SIZE, the headers of ring buffers * will be of PAGE_SIZE, however, only the first HV_HYP_PAGE will be put * into gpadl, therefore the number for HV_HYP_PAGE and the indexes of each * HV_HYP_PAGE will be different between different types of GPADL, for example * if PAGE_SIZE is 64K: * * BUFFER: * * gva: |-- 64k --|-- 64k --| ... | * gpa: | 4k | 4k | ... | 4k | 4k | 4k | ... | 4k | * index: 0 1 2 15 16 17 18 .. 31 32 ... * | | ... | | | ... | ... * v V V V V V * gpadl: | 4k | 4k | ... | 4k | 4k | 4k | ... | 4k | ... | * index: 0 1 2 ... 15 16 17 18 .. 31 32 ... * * RING: * * | header | data | header | data | * gva: |-- 64k --|-- 64k --| ... |-- 64k --|-- 64k --| ... | * gpa: | 4k | .. | 4k | 4k | ... | 4k | ... | 4k | .. | 4k | .. | ... | * index: 0 1 16 17 18 31 ... n n+1 n+16 ... 2n * | / / / | / / * | / / / | / / * | / / ... / ... | / ... / * | / / / | / / * | / / / | / / * V V V V V V v * gpadl: | 4k | 4k | ... | ... | 4k | 4k | ... | * index: 0 1 2 ... 16 ... n-15 n-14 n-13 ... 2n-30 */ enum hv_gpadl_type { HV_GPADL_BUFFER, HV_GPADL_RING }; /* Single-page buffer */ struct hv_page_buffer { u32 len; u32 offset; u64 pfn; }; /* Multiple-page buffer */ struct hv_multipage_buffer { /* Length and Offset determines the # of pfns in the array */ u32 len; u32 offset; u64 pfn_array[MAX_MULTIPAGE_BUFFER_COUNT]; }; /* * Multiple-page buffer array; the pfn array is variable size: * The number of entries in the PFN array is determined by * "len" and "offset". */ struct hv_mpb_array { /* Length and Offset determines the # of pfns in the array */ u32 len; u32 offset; u64 pfn_array[]; }; /* 0x18 includes the proprietary packet header */ #define MAX_PAGE_BUFFER_PACKET (0x18 + \ (sizeof(struct hv_page_buffer) * \ MAX_PAGE_BUFFER_COUNT)) #define MAX_MULTIPAGE_BUFFER_PACKET (0x18 + \ sizeof(struct hv_multipage_buffer)) #pragma pack(pop) struct hv_ring_buffer { /* Offset in bytes from the start of ring data below */ u32 write_index; /* Offset in bytes from the start of ring data below */ u32 read_index; u32 interrupt_mask; /* * WS2012/Win8 and later versions of Hyper-V implement interrupt * driven flow management. The feature bit feat_pending_send_sz * is set by the host on the host->guest ring buffer, and by the * guest on the guest->host ring buffer. * * The meaning of the feature bit is a bit complex in that it has * semantics that apply to both ring buffers. If the guest sets * the feature bit in the guest->host ring buffer, the guest is * telling the host that: * 1) It will set the pending_send_sz field in the guest->host ring * buffer when it is waiting for space to become available, and * 2) It will read the pending_send_sz field in the host->guest * ring buffer and interrupt the host when it frees enough space * * Similarly, if the host sets the feature bit in the host->guest * ring buffer, the host is telling the guest that: * 1) It will set the pending_send_sz field in the host->guest ring * buffer when it is waiting for space to become available, and * 2) It will read the pending_send_sz field in the guest->host * ring buffer and interrupt the guest when it frees enough space * * If either the guest or host does not set the feature bit that it * owns, that guest or host must do polling if it encounters a full * ring buffer, and not signal the other end with an interrupt. */ u32 pending_send_sz; u32 reserved1[12]; union { struct { u32 feat_pending_send_sz:1; }; u32 value; } feature_bits; /* Pad it to PAGE_SIZE so that data starts on page boundary */ u8 reserved2[PAGE_SIZE - 68]; /* * Ring data starts here + RingDataStartOffset * !!! DO NOT place any fields below this !!! */ u8 buffer[]; } __packed; /* Calculate the proper size of a ringbuffer, it must be page-aligned */ #define VMBUS_RING_SIZE(payload_sz) PAGE_ALIGN(sizeof(struct hv_ring_buffer) + \ (payload_sz)) struct hv_ring_buffer_info { struct hv_ring_buffer *ring_buffer; u32 ring_size; /* Include the shared header */ struct reciprocal_value ring_size_div10_reciprocal; spinlock_t ring_lock; u32 ring_datasize; /* < ring_size */ u32 priv_read_index; /* * The ring buffer mutex lock. This lock prevents the ring buffer from * being freed while the ring buffer is being accessed. */ struct mutex ring_buffer_mutex; /* Buffer that holds a copy of an incoming host packet */ void *pkt_buffer; u32 pkt_buffer_size; }; static inline u32 hv_get_bytes_to_read(const struct hv_ring_buffer_info *rbi) { u32 read_loc, write_loc, dsize, read; dsize = rbi->ring_datasize; read_loc = rbi->ring_buffer->read_index; write_loc = READ_ONCE(rbi->ring_buffer->write_index); read = write_loc >= read_loc ? (write_loc - read_loc) : (dsize - read_loc) + write_loc; return read; } static inline u32 hv_get_bytes_to_write(const struct hv_ring_buffer_info *rbi) { u32 read_loc, write_loc, dsize, write; dsize = rbi->ring_datasize; read_loc = READ_ONCE(rbi->ring_buffer->read_index); write_loc = rbi->ring_buffer->write_index; write = write_loc >= read_loc ? dsize - (write_loc - read_loc) : read_loc - write_loc; return write; } static inline u32 hv_get_avail_to_write_percent( const struct hv_ring_buffer_info *rbi) { u32 avail_write = hv_get_bytes_to_write(rbi); return reciprocal_divide( (avail_write << 3) + (avail_write << 1), rbi->ring_size_div10_reciprocal); } /* * VMBUS version is 32 bit entity broken up into * two 16 bit quantities: major_number. minor_number. * * 0 . 13 (Windows Server 2008) * 1 . 1 (Windows 7, WS2008 R2) * 2 . 4 (Windows 8, WS2012) * 3 . 0 (Windows 8.1, WS2012 R2) * 4 . 0 (Windows 10) * 4 . 1 (Windows 10 RS3) * 5 . 0 (Newer Windows 10) * 5 . 1 (Windows 10 RS4) * 5 . 2 (Windows Server 2019, RS5) * 5 . 3 (Windows Server 2022) * * The WS2008 and WIN7 versions are listed here for * completeness but are no longer supported in the * Linux kernel. */ #define VERSION_WS2008 ((0 << 16) | (13)) #define VERSION_WIN7 ((1 << 16) | (1)) #define VERSION_WIN8 ((2 << 16) | (4)) #define VERSION_WIN8_1 ((3 << 16) | (0)) #define VERSION_WIN10 ((4 << 16) | (0)) #define VERSION_WIN10_V4_1 ((4 << 16) | (1)) #define VERSION_WIN10_V5 ((5 << 16) | (0)) #define VERSION_WIN10_V5_1 ((5 << 16) | (1)) #define VERSION_WIN10_V5_2 ((5 << 16) | (2)) #define VERSION_WIN10_V5_3 ((5 << 16) | (3)) /* Make maximum size of pipe payload of 16K */ #define MAX_PIPE_DATA_PAYLOAD (sizeof(u8) * 16384) /* Define PipeMode values. */ #define VMBUS_PIPE_TYPE_BYTE 0x00000000 #define VMBUS_PIPE_TYPE_MESSAGE 0x00000004 /* The size of the user defined data buffer for non-pipe offers. */ #define MAX_USER_DEFINED_BYTES 120 /* The size of the user defined data buffer for pipe offers. */ #define MAX_PIPE_USER_DEFINED_BYTES 116 /* * At the center of the Channel Management library is the Channel Offer. This * struct contains the fundamental information about an offer. */ struct vmbus_channel_offer { guid_t if_type; guid_t if_instance; /* * These two fields are not currently used. */ u64 reserved1; u64 reserved2; u16 chn_flags; u16 mmio_megabytes; /* in bytes * 1024 * 1024 */ union { /* Non-pipes: The user has MAX_USER_DEFINED_BYTES bytes. */ struct { unsigned char user_def[MAX_USER_DEFINED_BYTES]; } std; /* * Pipes: * The following structure is an integrated pipe protocol, which * is implemented on top of standard user-defined data. Pipe * clients have MAX_PIPE_USER_DEFINED_BYTES left for their own * use. */ struct { u32 pipe_mode; unsigned char user_def[MAX_PIPE_USER_DEFINED_BYTES]; } pipe; } u; /* * The sub_channel_index is defined in Win8: a value of zero means a * primary channel and a value of non-zero means a sub-channel. * * Before Win8, the field is reserved, meaning it's always zero. */ u16 sub_channel_index; u16 reserved3; } __packed; /* Server Flags */ #define VMBUS_CHANNEL_ENUMERATE_DEVICE_INTERFACE 1 #define VMBUS_CHANNEL_SERVER_SUPPORTS_TRANSFER_PAGES 2 #define VMBUS_CHANNEL_SERVER_SUPPORTS_GPADLS 4 #define VMBUS_CHANNEL_NAMED_PIPE_MODE 0x10 #define VMBUS_CHANNEL_LOOPBACK_OFFER 0x100 #define VMBUS_CHANNEL_PARENT_OFFER 0x200 #define VMBUS_CHANNEL_REQUEST_MONITORED_NOTIFICATION 0x400 #define VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER 0x2000 struct vmpacket_descriptor { u16 type; u16 offset8; u16 len8; u16 flags; u64 trans_id; } __packed; struct vmpacket_header { u32 prev_pkt_start_offset; struct vmpacket_descriptor descriptor; } __packed; struct vmtransfer_page_range { u32 byte_count; u32 byte_offset; } __packed; struct vmtransfer_page_packet_header { struct vmpacket_descriptor d; u16 xfer_pageset_id; u8 sender_owns_set; u8 reserved; u32 range_cnt; struct vmtransfer_page_range ranges[]; } __packed; struct vmgpadl_packet_header { struct vmpacket_descriptor d; u32 gpadl; u32 reserved; } __packed; struct vmadd_remove_transfer_page_set { struct vmpacket_descriptor d; u32 gpadl; u16 xfer_pageset_id; u16 reserved; } __packed; /* * This structure defines a range in guest physical space that can be made to * look virtually contiguous. */ struct gpa_range { u32 byte_count; u32 byte_offset; u64 pfn_array[]; }; /* * This is the format for an Establish Gpadl packet, which contains a handle by * which this GPADL will be known and a set of GPA ranges associated with it. * This can be converted to a MDL by the guest OS. If there are multiple GPA * ranges, then the resulting MDL will be "chained," representing multiple VA * ranges. */ struct vmestablish_gpadl { struct vmpacket_descriptor d; u32 gpadl; u32 range_cnt; struct gpa_range range[1]; } __packed; /* * This is the format for a Teardown Gpadl packet, which indicates that the * GPADL handle in the Establish Gpadl packet will never be referenced again. */ struct vmteardown_gpadl { struct vmpacket_descriptor d; u32 gpadl; u32 reserved; /* for alignment to a 8-byte boundary */ } __packed; /* * This is the format for a GPA-Direct packet, which contains a set of GPA * ranges, in addition to commands and/or data. */ struct vmdata_gpa_direct { struct vmpacket_descriptor d; u32 reserved; u32 range_cnt; struct gpa_range range[1]; } __packed; /* This is the format for a Additional Data Packet. */ struct vmadditional_data { struct vmpacket_descriptor d; u64 total_bytes; u32 offset; u32 byte_cnt; unsigned char data[1]; } __packed; union vmpacket_largest_possible_header { struct vmpacket_descriptor simple_hdr; struct vmtransfer_page_packet_header xfer_page_hdr; struct vmgpadl_packet_header gpadl_hdr; struct vmadd_remove_transfer_page_set add_rm_xfer_page_hdr; struct vmestablish_gpadl establish_gpadl_hdr; struct vmteardown_gpadl teardown_gpadl_hdr; struct vmdata_gpa_direct data_gpa_direct_hdr; }; #define VMPACKET_DATA_START_ADDRESS(__packet) \ (void *)(((unsigned char *)__packet) + \ ((struct vmpacket_descriptor)__packet)->offset8 * 8) #define VMPACKET_DATA_LENGTH(__packet) \ ((((struct vmpacket_descriptor)__packet)->len8 - \ ((struct vmpacket_descriptor)__packet)->offset8) * 8) #define VMPACKET_TRANSFER_MODE(__packet) \ (((struct IMPACT)__packet)->type) enum vmbus_packet_type { VM_PKT_INVALID = 0x0, VM_PKT_SYNCH = 0x1, VM_PKT_ADD_XFER_PAGESET = 0x2, VM_PKT_RM_XFER_PAGESET = 0x3, VM_PKT_ESTABLISH_GPADL = 0x4, VM_PKT_TEARDOWN_GPADL = 0x5, VM_PKT_DATA_INBAND = 0x6, VM_PKT_DATA_USING_XFER_PAGES = 0x7, VM_PKT_DATA_USING_GPADL = 0x8, VM_PKT_DATA_USING_GPA_DIRECT = 0x9, VM_PKT_CANCEL_REQUEST = 0xa, VM_PKT_COMP = 0xb, VM_PKT_DATA_USING_ADDITIONAL_PKT = 0xc, VM_PKT_ADDITIONAL_DATA = 0xd }; #define VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED 1 /* Version 1 messages */ enum vmbus_channel_message_type { CHANNELMSG_INVALID = 0, CHANNELMSG_OFFERCHANNEL = 1, CHANNELMSG_RESCIND_CHANNELOFFER = 2, CHANNELMSG_REQUESTOFFERS = 3, CHANNELMSG_ALLOFFERS_DELIVERED = 4, CHANNELMSG_OPENCHANNEL = 5, CHANNELMSG_OPENCHANNEL_RESULT = 6, CHANNELMSG_CLOSECHANNEL = 7, CHANNELMSG_GPADL_HEADER = 8, CHANNELMSG_GPADL_BODY = 9, CHANNELMSG_GPADL_CREATED = 10, CHANNELMSG_GPADL_TEARDOWN = 11, CHANNELMSG_GPADL_TORNDOWN = 12, CHANNELMSG_RELID_RELEASED = 13, CHANNELMSG_INITIATE_CONTACT = 14, CHANNELMSG_VERSION_RESPONSE = 15, CHANNELMSG_UNLOAD = 16, CHANNELMSG_UNLOAD_RESPONSE = 17, CHANNELMSG_18 = 18, CHANNELMSG_19 = 19, CHANNELMSG_20 = 20, CHANNELMSG_TL_CONNECT_REQUEST = 21, CHANNELMSG_MODIFYCHANNEL = 22, CHANNELMSG_TL_CONNECT_RESULT = 23, CHANNELMSG_MODIFYCHANNEL_RESPONSE = 24, CHANNELMSG_COUNT }; /* Hyper-V supports about 2048 channels, and the RELIDs start with 1. */ #define INVALID_RELID U32_MAX struct vmbus_channel_message_header { enum vmbus_channel_message_type msgtype; u32 padding; } __packed; /* Query VMBus Version parameters */ struct vmbus_channel_query_vmbus_version { struct vmbus_channel_message_header header; u32 version; } __packed; /* VMBus Version Supported parameters */ struct vmbus_channel_version_supported { struct vmbus_channel_message_header header; u8 version_supported; } __packed; /* Offer Channel parameters */ struct vmbus_channel_offer_channel { struct vmbus_channel_message_header header; struct vmbus_channel_offer offer; u32 child_relid; u8 monitorid; /* * win7 and beyond splits this field into a bit field. */ u8 monitor_allocated:1; u8 reserved:7; /* * These are new fields added in win7 and later. * Do not access these fields without checking the * negotiated protocol. * * If "is_dedicated_interrupt" is set, we must not set the * associated bit in the channel bitmap while sending the * interrupt to the host. * * connection_id is to be used in signaling the host. */ u16 is_dedicated_interrupt:1; u16 reserved1:15; u32 connection_id; } __packed; /* Rescind Offer parameters */ struct vmbus_channel_rescind_offer { struct vmbus_channel_message_header header; u32 child_relid; } __packed; /* * Request Offer -- no parameters, SynIC message contains the partition ID * Set Snoop -- no parameters, SynIC message contains the partition ID * Clear Snoop -- no parameters, SynIC message contains the partition ID * All Offers Delivered -- no parameters, SynIC message contains the partition * ID * Flush Client -- no parameters, SynIC message contains the partition ID */ /* Open Channel parameters */ struct vmbus_channel_open_channel { struct vmbus_channel_message_header header; /* Identifies the specific VMBus channel that is being opened. */ u32 child_relid; /* ID making a particular open request at a channel offer unique. */ u32 openid; /* GPADL for the channel's ring buffer. */ u32 ringbuffer_gpadlhandle; /* * Starting with win8, this field will be used to specify * the target virtual processor on which to deliver the interrupt for * the host to guest communication. * Prior to win8, incoming channel interrupts would only * be delivered on cpu 0. Setting this value to 0 would * preserve the earlier behavior. */ u32 target_vp; /* * The upstream ring buffer begins at offset zero in the memory * described by RingBufferGpadlHandle. The downstream ring buffer * follows it at this offset (in pages). */ u32 downstream_ringbuffer_pageoffset; /* User-specific data to be passed along to the server endpoint. */ unsigned char userdata[MAX_USER_DEFINED_BYTES]; } __packed; /* Open Channel Result parameters */ struct vmbus_channel_open_result { struct vmbus_channel_message_header header; u32 child_relid; u32 openid; u32 status; } __packed; /* Modify Channel Result parameters */ struct vmbus_channel_modifychannel_response { struct vmbus_channel_message_header header; u32 child_relid; u32 status; } __packed; /* Close channel parameters; */ struct vmbus_channel_close_channel { struct vmbus_channel_message_header header; u32 child_relid; } __packed; /* Channel Message GPADL */ #define GPADL_TYPE_RING_BUFFER 1 #define GPADL_TYPE_SERVER_SAVE_AREA 2 #define GPADL_TYPE_TRANSACTION 8 /* * The number of PFNs in a GPADL message is defined by the number of * pages that would be spanned by ByteCount and ByteOffset. If the * implied number of PFNs won't fit in this packet, there will be a * follow-up packet that contains more. */ struct vmbus_channel_gpadl_header { struct vmbus_channel_message_header header; u32 child_relid; u32 gpadl; u16 range_buflen; u16 rangecount; struct gpa_range range[]; } __packed; /* This is the followup packet that contains more PFNs. */ struct vmbus_channel_gpadl_body { struct vmbus_channel_message_header header; u32 msgnumber; u32 gpadl; u64 pfn[]; } __packed; struct vmbus_channel_gpadl_created { struct vmbus_channel_message_header header; u32 child_relid; u32 gpadl; u32 creation_status; } __packed; struct vmbus_channel_gpadl_teardown { struct vmbus_channel_message_header header; u32 child_relid; u32 gpadl; } __packed; struct vmbus_channel_gpadl_torndown { struct vmbus_channel_message_header header; u32 gpadl; } __packed; struct vmbus_channel_relid_released { struct vmbus_channel_message_header header; u32 child_relid; } __packed; struct vmbus_channel_initiate_contact { struct vmbus_channel_message_header header; u32 vmbus_version_requested; u32 target_vcpu; /* The VCPU the host should respond to */ union { u64 interrupt_page; struct { u8 msg_sint; u8 msg_vtl; u8 reserved[6]; }; }; u64 monitor_page1; u64 monitor_page2; } __packed; /* Hyper-V socket: guest's connect()-ing to host */ struct vmbus_channel_tl_connect_request { struct vmbus_channel_message_header header; guid_t guest_endpoint_id; guid_t host_service_id; } __packed; /* Modify Channel parameters, cf. vmbus_send_modifychannel() */ struct vmbus_channel_modifychannel { struct vmbus_channel_message_header header; u32 child_relid; u32 target_vp; } __packed; struct vmbus_channel_version_response { struct vmbus_channel_message_header header; u8 version_supported; u8 connection_state; u16 padding; /* * On new hosts that support VMBus protocol 5.0, we must use * VMBUS_MESSAGE_CONNECTION_ID_4 for the Initiate Contact Message, * and for subsequent messages, we must use the Message Connection ID * field in the host-returned Version Response Message. * * On old hosts, we should always use VMBUS_MESSAGE_CONNECTION_ID (1). */ u32 msg_conn_id; } __packed; enum vmbus_channel_state { CHANNEL_OFFER_STATE, CHANNEL_OPENING_STATE, CHANNEL_OPEN_STATE, CHANNEL_OPENED_STATE, }; /* * Represents each channel msg on the vmbus connection This is a * variable-size data structure depending on the msg type itself */ struct vmbus_channel_msginfo { /* Bookkeeping stuff */ struct list_head msglistentry; /* So far, this is only used to handle gpadl body message */ struct list_head submsglist; /* Synchronize the request/response if needed */ struct completion waitevent; struct vmbus_channel *waiting_channel; union { struct vmbus_channel_version_supported version_supported; struct vmbus_channel_open_result open_result; struct vmbus_channel_gpadl_torndown gpadl_torndown; struct vmbus_channel_gpadl_created gpadl_created; struct vmbus_channel_version_response version_response; struct vmbus_channel_modifychannel_response modify_response; } response; u32 msgsize; /* * The channel message that goes out on the "wire". * It will contain at minimum the VMBUS_CHANNEL_MESSAGE_HEADER header */ unsigned char msg[]; }; struct vmbus_close_msg { struct vmbus_channel_msginfo info; struct vmbus_channel_close_channel msg; }; /* Define connection identifier type. */ union hv_connection_id { u32 asu32; struct { u32 id:24; u32 reserved:8; } u; }; enum vmbus_device_type { HV_IDE = 0, HV_SCSI, HV_FC, HV_NIC, HV_ND, HV_PCIE, HV_FB, HV_KBD, HV_MOUSE, HV_KVP, HV_TS, HV_HB, HV_SHUTDOWN, HV_FCOPY, HV_BACKUP, HV_DM, HV_UNKNOWN, }; /* * Provides request ids for VMBus. Encapsulates guest memory * addresses and stores the next available slot in req_arr * to generate new ids in constant time. */ struct vmbus_requestor { u64 *req_arr; unsigned long *req_bitmap; /* is a given slot available? */ u32 size; u64 next_request_id; spinlock_t req_lock; /* provides atomicity */ }; #define VMBUS_NO_RQSTOR U64_MAX #define VMBUS_RQST_ERROR (U64_MAX - 1) #define VMBUS_RQST_ADDR_ANY U64_MAX /* NetVSC-specific */ #define VMBUS_RQST_ID_NO_RESPONSE (U64_MAX - 2) /* StorVSC-specific */ #define VMBUS_RQST_INIT (U64_MAX - 2) #define VMBUS_RQST_RESET (U64_MAX - 3) struct vmbus_device { u16 dev_type; guid_t guid; bool perf_device; bool allowed_in_isolated; }; #define VMBUS_DEFAULT_MAX_PKT_SIZE 4096 struct vmbus_gpadl { u32 gpadl_handle; u32 size; void *buffer; }; struct vmbus_channel { struct list_head listentry; struct hv_device *device_obj; enum vmbus_channel_state state; struct vmbus_channel_offer_channel offermsg; /* * These are based on the OfferMsg.MonitorId. * Save it here for easy access. */ u8 monitor_grp; u8 monitor_bit; bool rescind; /* got rescind msg */ bool rescind_ref; /* got rescind msg, got channel reference */ struct completion rescind_event; struct vmbus_gpadl ringbuffer_gpadlhandle; /* Allocated memory for ring buffer */ struct page *ringbuffer_page; u32 ringbuffer_pagecount; u32 ringbuffer_send_offset; struct hv_ring_buffer_info outbound; /* send to parent */ struct hv_ring_buffer_info inbound; /* receive from parent */ struct vmbus_close_msg close_msg; /* Statistics */ u64 interrupts; /* Host to Guest interrupts */ u64 sig_events; /* Guest to Host events */ /* * Guest to host interrupts caused by the outbound ring buffer changing * from empty to not empty. */ u64 intr_out_empty; /* * Indicates that a full outbound ring buffer was encountered. The flag * is set to true when a full outbound ring buffer is encountered and * set to false when a write to the outbound ring buffer is completed. */ bool out_full_flag; /* Channel callback's invoked in softirq context */ struct tasklet_struct callback_event; void (*onchannel_callback)(void *context); void *channel_callback_context; void (*change_target_cpu_callback)(struct vmbus_channel *channel, u32 old, u32 new); /* * Synchronize channel scheduling and channel removal; see the inline * comments in vmbus_chan_sched() and vmbus_reset_channel_cb(). */ spinlock_t sched_lock; /* * A channel can be marked for one of three modes of reading: * BATCHED - callback called from taslket and should read * channel until empty. Interrupts from the host * are masked while read is in process (default). * DIRECT - callback called from tasklet (softirq). * ISR - callback called in interrupt context and must * invoke its own deferred processing. * Host interrupts are disabled and must be re-enabled * when ring is empty. */ enum hv_callback_mode { HV_CALL_BATCHED, HV_CALL_DIRECT, HV_CALL_ISR } callback_mode; bool is_dedicated_interrupt; u64 sig_event; /* * Starting with win8, this field will be used to specify the * target CPU on which to deliver the interrupt for the host * to guest communication. * * Prior to win8, incoming channel interrupts would only be * delivered on CPU 0. Setting this value to 0 would preserve * the earlier behavior. */ u32 target_cpu; /* * Support for sub-channels. For high performance devices, * it will be useful to have multiple sub-channels to support * a scalable communication infrastructure with the host. * The support for sub-channels is implemented as an extension * to the current infrastructure. * The initial offer is considered the primary channel and this * offer message will indicate if the host supports sub-channels. * The guest is free to ask for sub-channels to be offered and can * open these sub-channels as a normal "primary" channel. However, * all sub-channels will have the same type and instance guids as the * primary channel. Requests sent on a given channel will result in a * response on the same channel. */ /* * Sub-channel creation callback. This callback will be called in * process context when a sub-channel offer is received from the host. * The guest can open the sub-channel in the context of this callback. */ void (*sc_creation_callback)(struct vmbus_channel *new_sc); /* * Channel rescind callback. Some channels (the hvsock ones), need to * register a callback which is invoked in vmbus_onoffer_rescind(). */ void (*chn_rescind_callback)(struct vmbus_channel *channel); /* * All Sub-channels of a primary channel are linked here. */ struct list_head sc_list; /* * The primary channel this sub-channel belongs to. * This will be NULL for the primary channel. */ struct vmbus_channel *primary_channel; /* * Support per-channel state for use by vmbus drivers. */ void *per_channel_state; /* * Defer freeing channel until after all cpu's have * gone through grace period. */ struct rcu_head rcu; /* * For sysfs per-channel properties. */ struct kobject kobj; /* * For performance critical channels (storage, networking * etc,), Hyper-V has a mechanism to enhance the throughput * at the expense of latency: * When the host is to be signaled, we just set a bit in a shared page * and this bit will be inspected by the hypervisor within a certain * window and if the bit is set, the host will be signaled. The window * of time is the monitor latency - currently around 100 usecs. This * mechanism improves throughput by: * * A) Making the host more efficient - each time it wakes up, * potentially it will process more number of packets. The * monitor latency allows a batch to build up. * B) By deferring the hypercall to signal, we will also minimize * the interrupts. * * Clearly, these optimizations improve throughput at the expense of * latency. Furthermore, since the channel is shared for both * control and data messages, control messages currently suffer * unnecessary latency adversely impacting performance and boot * time. To fix this issue, permit tagging the channel as being * in "low latency" mode. In this mode, we will bypass the monitor * mechanism. */ bool low_latency; bool probe_done; /* * Cache the device ID here for easy access; this is useful, in * particular, in situations where the channel's device_obj has * not been allocated/initialized yet. */ u16 device_id; /* * We must offload the handling of the primary/sub channels * from the single-threaded vmbus_connection.work_queue to * two different workqueue, otherwise we can block * vmbus_connection.work_queue and hang: see vmbus_process_offer(). */ struct work_struct add_channel_work; /* * Guest to host interrupts caused by the inbound ring buffer changing * from full to not full while a packet is waiting. */ u64 intr_in_full; /* * The total number of write operations that encountered a full * outbound ring buffer. */ u64 out_full_total; /* * The number of write operations that were the first to encounter a * full outbound ring buffer. */ u64 out_full_first; /* enabling/disabling fuzz testing on the channel (default is false)*/ bool fuzz_testing_state; /* * Interrupt delay will delay the guest from emptying the ring buffer * for a specific amount of time. The delay is in microseconds and will * be between 1 to a maximum of 1000, its default is 0 (no delay). * The Message delay will delay guest reading on a per message basis * in microseconds between 1 to 1000 with the default being 0 * (no delay). */ u32 fuzz_testing_interrupt_delay; u32 fuzz_testing_message_delay; /* callback to generate a request ID from a request address */ u64 (*next_request_id_callback)(struct vmbus_channel *channel, u64 rqst_addr); /* callback to retrieve a request address from a request ID */ u64 (*request_addr_callback)(struct vmbus_channel *channel, u64 rqst_id); /* request/transaction ids for VMBus */ struct vmbus_requestor requestor; u32 rqstor_size; /* The max size of a packet on this channel */ u32 max_pkt_size; }; #define lock_requestor(channel, flags) \ do { \ struct vmbus_requestor *rqstor = &(channel)->requestor; \ \ spin_lock_irqsave(&rqstor->req_lock, flags); \ } while (0) static __always_inline void unlock_requestor(struct vmbus_channel *channel, unsigned long flags) { struct vmbus_requestor *rqstor = &channel->requestor; spin_unlock_irqrestore(&rqstor->req_lock, flags); } u64 vmbus_next_request_id(struct vmbus_channel *channel, u64 rqst_addr); u64 __vmbus_request_addr_match(struct vmbus_channel *channel, u64 trans_id, u64 rqst_addr); u64 vmbus_request_addr_match(struct vmbus_channel *channel, u64 trans_id, u64 rqst_addr); u64 vmbus_request_addr(struct vmbus_channel *channel, u64 trans_id); static inline bool is_hvsock_offer(const struct vmbus_channel_offer_channel *o) { return !!(o->offer.chn_flags & VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER); } static inline bool is_hvsock_channel(const struct vmbus_channel *c) { return is_hvsock_offer(&c->offermsg); } static inline bool is_sub_channel(const struct vmbus_channel *c) { return c->offermsg.offer.sub_channel_index != 0; } static inline void set_channel_read_mode(struct vmbus_channel *c, enum hv_callback_mode mode) { c->callback_mode = mode; } static inline void set_per_channel_state(struct vmbus_channel *c, void *s) { c->per_channel_state = s; } static inline void *get_per_channel_state(struct vmbus_channel *c) { return c->per_channel_state; } static inline void set_channel_pending_send_size(struct vmbus_channel *c, u32 size) { unsigned long flags; if (size) { spin_lock_irqsave(&c->outbound.ring_lock, flags); ++c->out_full_total; if (!c->out_full_flag) { ++c->out_full_first; c->out_full_flag = true; } spin_unlock_irqrestore(&c->outbound.ring_lock, flags); } else { c->out_full_flag = false; } c->outbound.ring_buffer->pending_send_sz = size; } void vmbus_onmessage(struct vmbus_channel_message_header *hdr); int vmbus_request_offers(void); /* * APIs for managing sub-channels. */ void vmbus_set_sc_create_callback(struct vmbus_channel *primary_channel, void (*sc_cr_cb)(struct vmbus_channel *new_sc)); void vmbus_set_chn_rescind_callback(struct vmbus_channel *channel, void (*chn_rescind_cb)(struct vmbus_channel *)); /* The format must be the same as struct vmdata_gpa_direct */ struct vmbus_channel_packet_page_buffer { u16 type; u16 dataoffset8; u16 length8; u16 flags; u64 transactionid; u32 reserved; u32 rangecount; struct hv_page_buffer range[MAX_PAGE_BUFFER_COUNT]; } __packed; /* The format must be the same as struct vmdata_gpa_direct */ struct vmbus_channel_packet_multipage_buffer { u16 type; u16 dataoffset8; u16 length8; u16 flags; u64 transactionid; u32 reserved; u32 rangecount; /* Always 1 in this case */ struct hv_multipage_buffer range; } __packed; /* The format must be the same as struct vmdata_gpa_direct */ struct vmbus_packet_mpb_array { u16 type; u16 dataoffset8; u16 length8; u16 flags; u64 transactionid; u32 reserved; u32 rangecount; /* Always 1 in this case */ struct hv_mpb_array range; } __packed; int vmbus_alloc_ring(struct vmbus_channel *channel, u32 send_size, u32 recv_size); void vmbus_free_ring(struct vmbus_channel *channel); int vmbus_connect_ring(struct vmbus_channel *channel, void (*onchannel_callback)(void *context), void *context); int vmbus_disconnect_ring(struct vmbus_channel *channel); extern int vmbus_open(struct vmbus_channel *channel, u32 send_ringbuffersize, u32 recv_ringbuffersize, void *userdata, u32 userdatalen, void (*onchannel_callback)(void *context), void *context); extern void vmbus_close(struct vmbus_channel *channel); extern int vmbus_sendpacket_getid(struct vmbus_channel *channel, void *buffer, u32 bufferLen, u64 requestid, u64 *trans_id, enum vmbus_packet_type type, u32 flags); extern int vmbus_sendpacket(struct vmbus_channel *channel, void *buffer, u32 bufferLen, u64 requestid, enum vmbus_packet_type type, u32 flags); extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, struct hv_page_buffer pagebuffers[], u32 pagecount, void *buffer, u32 bufferlen, u64 requestid); extern int vmbus_sendpacket_mpb_desc(struct vmbus_channel *channel, struct vmbus_packet_mpb_array *mpb, u32 desc_size, void *buffer, u32 bufferlen, u64 requestid); extern int vmbus_establish_gpadl(struct vmbus_channel *channel, void *kbuffer, u32 size, struct vmbus_gpadl *gpadl); extern int vmbus_teardown_gpadl(struct vmbus_channel *channel, struct vmbus_gpadl *gpadl); void vmbus_reset_channel_cb(struct vmbus_channel *channel); extern int vmbus_recvpacket(struct vmbus_channel *channel, void *buffer, u32 bufferlen, u32 *buffer_actual_len, u64 *requestid); extern int vmbus_recvpacket_raw(struct vmbus_channel *channel, void *buffer, u32 bufferlen, u32 *buffer_actual_len, u64 *requestid); /* Base driver object */ struct hv_driver { const char *name; /* * A hvsock offer, which has a VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER * channel flag, actually doesn't mean a synthetic device because the * offer's if_type/if_instance can change for every new hvsock * connection. * * However, to facilitate the notification of new-offer/rescind-offer * from vmbus driver to hvsock driver, we can handle hvsock offer as * a special vmbus device, and hence we need the below flag to * indicate if the driver is the hvsock driver or not: we need to * specially treat the hvosck offer & driver in vmbus_match(). */ bool hvsock; /* the device type supported by this driver */ guid_t dev_type; const struct hv_vmbus_device_id *id_table; struct device_driver driver; /* dynamic device GUID's */ struct { spinlock_t lock; struct list_head list; } dynids; int (*probe)(struct hv_device *, const struct hv_vmbus_device_id *); void (*remove)(struct hv_device *dev); void (*shutdown)(struct hv_device *); int (*suspend)(struct hv_device *); int (*resume)(struct hv_device *); }; /* Base device object */ struct hv_device { /* the device type id of this device */ guid_t dev_type; /* the device instance id of this device */ guid_t dev_instance; u16 vendor_id; u16 device_id; struct device device; /* * Driver name to force a match. Do not set directly, because core * frees it. Use driver_set_override() to set or clear it. */ const char *driver_override; struct vmbus_channel *channel; struct kset *channels_kset; struct device_dma_parameters dma_parms; u64 dma_mask; /* place holder to keep track of the dir for hv device in debugfs */ struct dentry *debug_dir; }; #define device_to_hv_device(d) container_of_const(d, struct hv_device, device) static inline struct hv_driver *drv_to_hv_drv(struct device_driver *d) { return container_of(d, struct hv_driver, driver); } static inline void hv_set_drvdata(struct hv_device *dev, void *data) { dev_set_drvdata(&dev->device, data); } static inline void *hv_get_drvdata(struct hv_device *dev) { return dev_get_drvdata(&dev->device); } struct hv_ring_buffer_debug_info { u32 current_interrupt_mask; u32 current_read_index; u32 current_write_index; u32 bytes_avail_toread; u32 bytes_avail_towrite; }; int hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info, struct hv_ring_buffer_debug_info *debug_info); bool hv_ringbuffer_spinlock_busy(struct vmbus_channel *channel); /* Vmbus interface */ #define vmbus_driver_register(driver) \ __vmbus_driver_register(driver, THIS_MODULE, KBUILD_MODNAME) int __must_check __vmbus_driver_register(struct hv_driver *hv_driver, struct module *owner, const char *mod_name); void vmbus_driver_unregister(struct hv_driver *hv_driver); void vmbus_hvsock_device_unregister(struct vmbus_channel *channel); int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj, resource_size_t min, resource_size_t max, resource_size_t size, resource_size_t align, bool fb_overlap_ok); void vmbus_free_mmio(resource_size_t start, resource_size_t size); /* * GUID definitions of various offer types - services offered to the guest. */ /* * Network GUID * {f8615163-df3e-46c5-913f-f2d2f965ed0e} */ #define HV_NIC_GUID \ .guid = GUID_INIT(0xf8615163, 0xdf3e, 0x46c5, 0x91, 0x3f, \ 0xf2, 0xd2, 0xf9, 0x65, 0xed, 0x0e) /* * IDE GUID * {32412632-86cb-44a2-9b5c-50d1417354f5} */ #define HV_IDE_GUID \ .guid = GUID_INIT(0x32412632, 0x86cb, 0x44a2, 0x9b, 0x5c, \ 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5) /* * SCSI GUID * {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */ #define HV_SCSI_GUID \ .guid = GUID_INIT(0xba6163d9, 0x04a1, 0x4d29, 0xb6, 0x05, \ 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f) /* * Shutdown GUID * {0e0b6031-5213-4934-818b-38d90ced39db} */ #define HV_SHUTDOWN_GUID \ .guid = GUID_INIT(0x0e0b6031, 0x5213, 0x4934, 0x81, 0x8b, \ 0x38, 0xd9, 0x0c, 0xed, 0x39, 0xdb) /* * Time Synch GUID * {9527E630-D0AE-497b-ADCE-E80AB0175CAF} */ #define HV_TS_GUID \ .guid = GUID_INIT(0x9527e630, 0xd0ae, 0x497b, 0xad, 0xce, \ 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf) /* * Heartbeat GUID * {57164f39-9115-4e78-ab55-382f3bd5422d} */ #define HV_HEART_BEAT_GUID \ .guid = GUID_INIT(0x57164f39, 0x9115, 0x4e78, 0xab, 0x55, \ 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d) /* * KVP GUID * {a9a0f4e7-5a45-4d96-b827-8a841e8c03e6} */ #define HV_KVP_GUID \ .guid = GUID_INIT(0xa9a0f4e7, 0x5a45, 0x4d96, 0xb8, 0x27, \ 0x8a, 0x84, 0x1e, 0x8c, 0x03, 0xe6) /* * Dynamic memory GUID * {525074dc-8985-46e2-8057-a307dc18a502} */ #define HV_DM_GUID \ .guid = GUID_INIT(0x525074dc, 0x8985, 0x46e2, 0x80, 0x57, \ 0xa3, 0x07, 0xdc, 0x18, 0xa5, 0x02) /* * Mouse GUID * {cfa8b69e-5b4a-4cc0-b98b-8ba1a1f3f95a} */ #define HV_MOUSE_GUID \ .guid = GUID_INIT(0xcfa8b69e, 0x5b4a, 0x4cc0, 0xb9, 0x8b, \ 0x8b, 0xa1, 0xa1, 0xf3, 0xf9, 0x5a) /* * Keyboard GUID * {f912ad6d-2b17-48ea-bd65-f927a61c7684} */ #define HV_KBD_GUID \ .guid = GUID_INIT(0xf912ad6d, 0x2b17, 0x48ea, 0xbd, 0x65, \ 0xf9, 0x27, 0xa6, 0x1c, 0x76, 0x84) /* * VSS (Backup/Restore) GUID */ #define HV_VSS_GUID \ .guid = GUID_INIT(0x35fa2e29, 0xea23, 0x4236, 0x96, 0xae, \ 0x3a, 0x6e, 0xba, 0xcb, 0xa4, 0x40) /* * Synthetic Video GUID * {DA0A7802-E377-4aac-8E77-0558EB1073F8} */ #define HV_SYNTHVID_GUID \ .guid = GUID_INIT(0xda0a7802, 0xe377, 0x4aac, 0x8e, 0x77, \ 0x05, 0x58, 0xeb, 0x10, 0x73, 0xf8) /* * Synthetic FC GUID * {2f9bcc4a-0069-4af3-b76b-6fd0be528cda} */ #define HV_SYNTHFC_GUID \ .guid = GUID_INIT(0x2f9bcc4a, 0x0069, 0x4af3, 0xb7, 0x6b, \ 0x6f, 0xd0, 0xbe, 0x52, 0x8c, 0xda) /* * Guest File Copy Service * {34D14BE3-DEE4-41c8-9AE7-6B174977C192} */ #define HV_FCOPY_GUID \ .guid = GUID_INIT(0x34d14be3, 0xdee4, 0x41c8, 0x9a, 0xe7, \ 0x6b, 0x17, 0x49, 0x77, 0xc1, 0x92) /* * NetworkDirect. This is the guest RDMA service. * {8c2eaf3d-32a7-4b09-ab99-bd1f1c86b501} */ #define HV_ND_GUID \ .guid = GUID_INIT(0x8c2eaf3d, 0x32a7, 0x4b09, 0xab, 0x99, \ 0xbd, 0x1f, 0x1c, 0x86, 0xb5, 0x01) /* * PCI Express Pass Through * {44C4F61D-4444-4400-9D52-802E27EDE19F} */ #define HV_PCIE_GUID \ .guid = GUID_INIT(0x44c4f61d, 0x4444, 0x4400, 0x9d, 0x52, \ 0x80, 0x2e, 0x27, 0xed, 0xe1, 0x9f) /* * Linux doesn't support these 4 devices: the first two are for * Automatic Virtual Machine Activation, the third is for * Remote Desktop Virtualization, and the fourth is Initial * Machine Configuration (IMC) used only by Windows guests. * {f8e65716-3cb3-4a06-9a60-1889c5cccab5} * {3375baf4-9e15-4b30-b765-67acb10d607b} * {276aacf4-ac15-426c-98dd-7521ad3f01fe} * {c376c1c3-d276-48d2-90a9-c04748072c60} */ #define HV_AVMA1_GUID \ .guid = GUID_INIT(0xf8e65716, 0x3cb3, 0x4a06, 0x9a, 0x60, \ 0x18, 0x89, 0xc5, 0xcc, 0xca, 0xb5) #define HV_AVMA2_GUID \ .guid = GUID_INIT(0x3375baf4, 0x9e15, 0x4b30, 0xb7, 0x65, \ 0x67, 0xac, 0xb1, 0x0d, 0x60, 0x7b) #define HV_RDV_GUID \ .guid = GUID_INIT(0x276aacf4, 0xac15, 0x426c, 0x98, 0xdd, \ 0x75, 0x21, 0xad, 0x3f, 0x01, 0xfe) #define HV_IMC_GUID \ .guid = GUID_INIT(0xc376c1c3, 0xd276, 0x48d2, 0x90, 0xa9, \ 0xc0, 0x47, 0x48, 0x07, 0x2c, 0x60) /* * Common header for Hyper-V ICs */ #define ICMSGTYPE_NEGOTIATE 0 #define ICMSGTYPE_HEARTBEAT 1 #define ICMSGTYPE_KVPEXCHANGE 2 #define ICMSGTYPE_SHUTDOWN 3 #define ICMSGTYPE_TIMESYNC 4 #define ICMSGTYPE_VSS 5 #define ICMSGTYPE_FCOPY 7 #define ICMSGHDRFLAG_TRANSACTION 1 #define ICMSGHDRFLAG_REQUEST 2 #define ICMSGHDRFLAG_RESPONSE 4 /* * While we want to handle util services as regular devices, * there is only one instance of each of these services; so * we statically allocate the service specific state. */ struct hv_util_service { u8 *recv_buffer; void *channel; void (*util_cb)(void *); int (*util_init)(struct hv_util_service *); void (*util_deinit)(void); int (*util_pre_suspend)(void); int (*util_pre_resume)(void); }; struct vmbuspipe_hdr { u32 flags; u32 msgsize; } __packed; struct ic_version { u16 major; u16 minor; } __packed; struct icmsg_hdr { struct ic_version icverframe; u16 icmsgtype; struct ic_version icvermsg; u16 icmsgsize; u32 status; u8 ictransaction_id; u8 icflags; u8 reserved[2]; } __packed; #define IC_VERSION_NEGOTIATION_MAX_VER_COUNT 100 #define ICMSG_HDR (sizeof(struct vmbuspipe_hdr) + sizeof(struct icmsg_hdr)) #define ICMSG_NEGOTIATE_PKT_SIZE(icframe_vercnt, icmsg_vercnt) \ (ICMSG_HDR + sizeof(struct icmsg_negotiate) + \ (((icframe_vercnt) + (icmsg_vercnt)) * sizeof(struct ic_version))) struct icmsg_negotiate { u16 icframe_vercnt; u16 icmsg_vercnt; u32 reserved; struct ic_version icversion_data[]; /* any size array */ } __packed; struct shutdown_msg_data { u32 reason_code; u32 timeout_seconds; u32 flags; u8 display_message[2048]; } __packed; struct heartbeat_msg_data { u64 seq_num; u32 reserved[8]; } __packed; /* Time Sync IC defs */ #define ICTIMESYNCFLAG_PROBE 0 #define ICTIMESYNCFLAG_SYNC 1 #define ICTIMESYNCFLAG_SAMPLE 2 #ifdef __x86_64__ #define WLTIMEDELTA 116444736000000000L /* in 100ns unit */ #else #define WLTIMEDELTA 116444736000000000LL #endif struct ictimesync_data { u64 parenttime; u64 childtime; u64 roundtriptime; u8 flags; } __packed; struct ictimesync_ref_data { u64 parenttime; u64 vmreferencetime; u8 flags; char leapflags; char stratum; u8 reserved[3]; } __packed; struct hyperv_service_callback { u8 msg_type; char *log_msg; guid_t data; struct vmbus_channel *channel; void (*callback)(void *context); }; struct hv_dma_range { dma_addr_t dma; u32 mapping_size; }; #define MAX_SRV_VER 0x7ffffff extern bool vmbus_prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, u8 *buf, u32 buflen, const int *fw_version, int fw_vercnt, const int *srv_version, int srv_vercnt, int *nego_fw_version, int *nego_srv_version); void hv_process_channel_removal(struct vmbus_channel *channel); void vmbus_setevent(struct vmbus_channel *channel); /* * Negotiated version with the Host. */ extern __u32 vmbus_proto_version; int vmbus_send_tl_connect_request(const guid_t *shv_guest_servie_id, const guid_t *shv_host_servie_id); int vmbus_send_modifychannel(struct vmbus_channel *channel, u32 target_vp); void vmbus_set_event(struct vmbus_channel *channel); /* Get the start of the ring buffer. */ static inline void * hv_get_ring_buffer(const struct hv_ring_buffer_info *ring_info) { return ring_info->ring_buffer->buffer; } /* * Mask off host interrupt callback notifications */ static inline void hv_begin_read(struct hv_ring_buffer_info *rbi) { rbi->ring_buffer->interrupt_mask = 1; /* make sure mask update is not reordered */ virt_mb(); } /* * Re-enable host callback and return number of outstanding bytes */ static inline u32 hv_end_read(struct hv_ring_buffer_info *rbi) { rbi->ring_buffer->interrupt_mask = 0; /* make sure mask update is not reordered */ virt_mb(); /* * Now check to see if the ring buffer is still empty. * If it is not, we raced and we need to process new * incoming messages. */ return hv_get_bytes_to_read(rbi); } /* * An API to support in-place processing of incoming VMBUS packets. */ /* Get data payload associated with descriptor */ static inline void *hv_pkt_data(const struct vmpacket_descriptor *desc) { return (void *)((unsigned long)desc + (desc->offset8 << 3)); } /* Get data size associated with descriptor */ static inline u32 hv_pkt_datalen(const struct vmpacket_descriptor *desc) { return (desc->len8 << 3) - (desc->offset8 << 3); } /* Get packet length associated with descriptor */ static inline u32 hv_pkt_len(const struct vmpacket_descriptor *desc) { return desc->len8 << 3; } struct vmpacket_descriptor * hv_pkt_iter_first(struct vmbus_channel *channel); struct vmpacket_descriptor * __hv_pkt_iter_next(struct vmbus_channel *channel, const struct vmpacket_descriptor *pkt); void hv_pkt_iter_close(struct vmbus_channel *channel); static inline struct vmpacket_descriptor * hv_pkt_iter_next(struct vmbus_channel *channel, const struct vmpacket_descriptor *pkt) { struct vmpacket_descriptor *nxt; nxt = __hv_pkt_iter_next(channel, pkt); if (!nxt) hv_pkt_iter_close(channel); return nxt; } #define foreach_vmbus_pkt(pkt, channel) \ for (pkt = hv_pkt_iter_first(channel); pkt; \ pkt = hv_pkt_iter_next(channel, pkt)) /* * Interface for passing data between SR-IOV PF and VF drivers. The VF driver * sends requests to read and write blocks. Each block must be 128 bytes or * smaller. Optionally, the VF driver can register a callback function which * will be invoked when the host says that one or more of the first 64 block * IDs is "invalid" which means that the VF driver should reread them. */ #define HV_CONFIG_BLOCK_SIZE_MAX 128 int hyperv_read_cfg_blk(struct pci_dev *dev, void *buf, unsigned int buf_len, unsigned int block_id, unsigned int *bytes_returned); int hyperv_write_cfg_blk(struct pci_dev *dev, void *buf, unsigned int len, unsigned int block_id); int hyperv_reg_block_invalidate(struct pci_dev *dev, void *context, void (*block_invalidate)(void *context, u64 block_mask)); struct hyperv_pci_block_ops { int (*read_block)(struct pci_dev *dev, void *buf, unsigned int buf_len, unsigned int block_id, unsigned int *bytes_returned); int (*write_block)(struct pci_dev *dev, void *buf, unsigned int len, unsigned int block_id); int (*reg_blk_invalidate)(struct pci_dev *dev, void *context, void (*block_invalidate)(void *context, u64 block_mask)); }; extern struct hyperv_pci_block_ops hvpci_block_ops; static inline unsigned long virt_to_hvpfn(void *addr) { phys_addr_t paddr; if (is_vmalloc_addr(addr)) paddr = page_to_phys(vmalloc_to_page(addr)) + offset_in_page(addr); else paddr = __pa(addr); return paddr >> HV_HYP_PAGE_SHIFT; } #define NR_HV_HYP_PAGES_IN_PAGE (PAGE_SIZE / HV_HYP_PAGE_SIZE) #define offset_in_hvpage(ptr) ((unsigned long)(ptr) & ~HV_HYP_PAGE_MASK) #define HVPFN_UP(x) (((x) + HV_HYP_PAGE_SIZE-1) >> HV_HYP_PAGE_SHIFT) #define HVPFN_DOWN(x) ((x) >> HV_HYP_PAGE_SHIFT) #define page_to_hvpfn(page) (page_to_pfn(page) * NR_HV_HYP_PAGES_IN_PAGE) #endif /* _HYPERV_H */ |