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 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 | /* visorchipset_main.c
*
* Copyright (C) 2010 - 2013 UNISYS CORPORATION
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for more
* details.
*/
#include "globals.h"
#include "visorchipset.h"
#include "procobjecttree.h"
#include "visorchannel.h"
#include "periodic_work.h"
#include "testing.h"
#include "file.h"
#include "parser.h"
#include "uniklog.h"
#include "uisutils.h"
#include "controlvmcompletionstatus.h"
#include "guestlinuxdebug.h"
#include <linux/nls.h>
#include <linux/netdevice.h>
#include <linux/platform_device.h>
#include <linux/uuid.h>
#define CURRENT_FILE_PC VISOR_CHIPSET_PC_visorchipset_main_c
#define TEST_VNIC_PHYSITF "eth0" /* physical network itf for
* vnic loopback test */
#define TEST_VNIC_SWITCHNO 1
#define TEST_VNIC_BUSNO 9
#define MAX_NAME_SIZE 128
#define MAX_IP_SIZE 50
#define MAXOUTSTANDINGCHANNELCOMMAND 256
#define POLLJIFFIES_CONTROLVMCHANNEL_FAST 1
#define POLLJIFFIES_CONTROLVMCHANNEL_SLOW 100
/* When the controlvm channel is idle for at least MIN_IDLE_SECONDS,
* we switch to slow polling mode. As soon as we get a controlvm
* message, we switch back to fast polling mode.
*/
#define MIN_IDLE_SECONDS 10
static ulong Poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST;
static ulong Most_recent_message_jiffies; /* when we got our last
* controlvm message */
static inline char *
NONULLSTR(char *s)
{
if (s)
return s;
return "";
}
static int serverregistered;
static int clientregistered;
#define MAX_CHIPSET_EVENTS 2
static u8 chipset_events[MAX_CHIPSET_EVENTS] = { 0, 0 };
static struct delayed_work Periodic_controlvm_work;
static struct workqueue_struct *Periodic_controlvm_workqueue;
static DEFINE_SEMAPHORE(NotifierLock);
typedef struct {
CONTROLVM_MESSAGE message;
unsigned int crc;
} MESSAGE_ENVELOPE;
static CONTROLVM_MESSAGE_HEADER g_DiagMsgHdr;
static CONTROLVM_MESSAGE_HEADER g_ChipSetMsgHdr;
static CONTROLVM_MESSAGE_HEADER g_DelDumpMsgHdr;
static const uuid_le UltraDiagPoolChannelProtocolGuid =
ULTRA_DIAG_POOL_CHANNEL_PROTOCOL_GUID;
/* 0xffffff is an invalid Bus/Device number */
static ulong g_diagpoolBusNo = 0xffffff;
static ulong g_diagpoolDevNo = 0xffffff;
static CONTROLVM_MESSAGE_PACKET g_DeviceChangeStatePacket;
/* Only VNIC and VHBA channels are sent to visorclientbus (aka
* "visorhackbus")
*/
#define FOR_VISORHACKBUS(channel_type_guid) \
(((uuid_le_cmp(channel_type_guid, UltraVnicChannelProtocolGuid) == 0)\
|| (uuid_le_cmp(channel_type_guid, UltraVhbaChannelProtocolGuid) == 0)))
#define FOR_VISORBUS(channel_type_guid) (!(FOR_VISORHACKBUS(channel_type_guid)))
#define is_diagpool_channel(channel_type_guid) \
(uuid_le_cmp(channel_type_guid, UltraDiagPoolChannelProtocolGuid) == 0)
static LIST_HEAD(BusInfoList);
static LIST_HEAD(DevInfoList);
static VISORCHANNEL *ControlVm_channel;
typedef struct {
u8 __iomem *ptr; /* pointer to base address of payload pool */
u64 offset; /* offset from beginning of controlvm
* channel to beginning of payload * pool */
u32 bytes; /* number of bytes in payload pool */
} CONTROLVM_PAYLOAD_INFO;
/* Manages the request payload in the controlvm channel */
static CONTROLVM_PAYLOAD_INFO ControlVm_payload_info;
static pCHANNEL_HEADER Test_Vnic_channel;
typedef struct {
CONTROLVM_MESSAGE_HEADER Dumpcapture_header;
CONTROLVM_MESSAGE_HEADER Gettextdump_header;
CONTROLVM_MESSAGE_HEADER Dumpcomplete_header;
BOOL Gettextdump_outstanding;
u32 crc32;
ulong length;
atomic_t buffers_in_use;
ulong destination;
} LIVEDUMP_INFO;
/* Manages the info for a CONTROLVM_DUMP_CAPTURESTATE /
* CONTROLVM_DUMP_GETTEXTDUMP / CONTROLVM_DUMP_COMPLETE conversation.
*/
static LIVEDUMP_INFO LiveDump_info;
/* The following globals are used to handle the scenario where we are unable to
* offload the payload from a controlvm message due to memory requirements. In
* this scenario, we simply stash the controlvm message, then attempt to
* process it again the next time controlvm_periodic_work() runs.
*/
static CONTROLVM_MESSAGE ControlVm_Pending_Msg;
static BOOL ControlVm_Pending_Msg_Valid = FALSE;
/* Pool of struct putfile_buffer_entry, for keeping track of pending (incoming)
* TRANSMIT_FILE PutFile payloads.
*/
static struct kmem_cache *Putfile_buffer_list_pool;
static const char Putfile_buffer_list_pool_name[] =
"controlvm_putfile_buffer_list_pool";
/* This identifies a data buffer that has been received via a controlvm messages
* in a remote --> local CONTROLVM_TRANSMIT_FILE conversation.
*/
struct putfile_buffer_entry {
struct list_head next; /* putfile_buffer_entry list */
PARSER_CONTEXT *parser_ctx; /* points to buffer containing input data */
};
/* List of struct putfile_request *, via next_putfile_request member.
* Each entry in this list identifies an outstanding TRANSMIT_FILE
* conversation.
*/
static LIST_HEAD(Putfile_request_list);
/* This describes a buffer and its current state of transfer (e.g., how many
* bytes have already been supplied as putfile data, and how many bytes are
* remaining) for a putfile_request.
*/
struct putfile_active_buffer {
/* a payload from a controlvm message, containing a file data buffer */
PARSER_CONTEXT *parser_ctx;
/* points within data area of parser_ctx to next byte of data */
u8 *pnext;
/* # bytes left from <pnext> to the end of this data buffer */
size_t bytes_remaining;
};
#define PUTFILE_REQUEST_SIG 0x0906101302281211
/* This identifies a single remote --> local CONTROLVM_TRANSMIT_FILE
* conversation. Structs of this type are dynamically linked into
* <Putfile_request_list>.
*/
struct putfile_request {
u64 sig; /* PUTFILE_REQUEST_SIG */
/* header from original TransmitFile request */
CONTROLVM_MESSAGE_HEADER controlvm_header;
u64 file_request_number; /* from original TransmitFile request */
/* link to next struct putfile_request */
struct list_head next_putfile_request;
/* most-recent sequence number supplied via a controlvm message */
u64 data_sequence_number;
/* head of putfile_buffer_entry list, which describes the data to be
* supplied as putfile data;
* - this list is added to when controlvm messages come in that supply
* file data
* - this list is removed from via the hotplug program that is actually
* consuming these buffers to write as file data */
struct list_head input_buffer_list;
spinlock_t req_list_lock; /* lock for input_buffer_list */
/* waiters for input_buffer_list to go non-empty */
wait_queue_head_t input_buffer_wq;
/* data not yet read within current putfile_buffer_entry */
struct putfile_active_buffer active_buf;
/* <0 = failed, 0 = in-progress, >0 = successful; */
/* note that this must be set with req_list_lock, and if you set <0, */
/* it is your responsibility to also free up all of the other objects */
/* in this struct (like input_buffer_list, active_buf.parser_ctx) */
/* before releasing the lock */
int completion_status;
};
static atomic_t Visorchipset_cache_buffers_in_use = ATOMIC_INIT(0);
struct parahotplug_request {
struct list_head list;
int id;
unsigned long expiration;
CONTROLVM_MESSAGE msg;
};
static LIST_HEAD(Parahotplug_request_list);
static DEFINE_SPINLOCK(Parahotplug_request_list_lock); /* lock for above */
static void parahotplug_process_list(void);
/* Manages the info for a CONTROLVM_DUMP_CAPTURESTATE /
* CONTROLVM_REPORTEVENT.
*/
static VISORCHIPSET_BUSDEV_NOTIFIERS BusDev_Server_Notifiers;
static VISORCHIPSET_BUSDEV_NOTIFIERS BusDev_Client_Notifiers;
static void bus_create_response(ulong busNo, int response);
static void bus_destroy_response(ulong busNo, int response);
static void device_create_response(ulong busNo, ulong devNo, int response);
static void device_destroy_response(ulong busNo, ulong devNo, int response);
static void device_resume_response(ulong busNo, ulong devNo, int response);
static VISORCHIPSET_BUSDEV_RESPONDERS BusDev_Responders = {
.bus_create = bus_create_response,
.bus_destroy = bus_destroy_response,
.device_create = device_create_response,
.device_destroy = device_destroy_response,
.device_pause = visorchipset_device_pause_response,
.device_resume = device_resume_response,
};
/* info for /dev/visorchipset */
static dev_t MajorDev = -1; /**< indicates major num for device */
/* prototypes for attributes */
static ssize_t toolaction_show(struct device *dev,
struct device_attribute *attr, char *buf);
static ssize_t toolaction_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count);
static DEVICE_ATTR_RW(toolaction);
static ssize_t boottotool_show(struct device *dev,
struct device_attribute *attr, char *buf);
static ssize_t boottotool_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count);
static DEVICE_ATTR_RW(boottotool);
static ssize_t error_show(struct device *dev, struct device_attribute *attr,
char *buf);
static ssize_t error_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count);
static DEVICE_ATTR_RW(error);
static ssize_t textid_show(struct device *dev, struct device_attribute *attr,
char *buf);
static ssize_t textid_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count);
static DEVICE_ATTR_RW(textid);
static ssize_t remaining_steps_show(struct device *dev,
struct device_attribute *attr, char *buf);
static ssize_t remaining_steps_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count);
static DEVICE_ATTR_RW(remaining_steps);
static ssize_t chipsetready_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count);
static DEVICE_ATTR_WO(chipsetready);
static ssize_t devicedisabled_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count);
static DEVICE_ATTR_WO(devicedisabled);
static ssize_t deviceenabled_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count);
static DEVICE_ATTR_WO(deviceenabled);
static struct attribute *visorchipset_install_attrs[] = {
&dev_attr_toolaction.attr,
&dev_attr_boottotool.attr,
&dev_attr_error.attr,
&dev_attr_textid.attr,
&dev_attr_remaining_steps.attr,
NULL
};
static struct attribute_group visorchipset_install_group = {
.name = "install",
.attrs = visorchipset_install_attrs
};
static struct attribute *visorchipset_guest_attrs[] = {
&dev_attr_chipsetready.attr,
NULL
};
static struct attribute_group visorchipset_guest_group = {
.name = "guest",
.attrs = visorchipset_guest_attrs
};
static struct attribute *visorchipset_parahotplug_attrs[] = {
&dev_attr_devicedisabled.attr,
&dev_attr_deviceenabled.attr,
NULL
};
static struct attribute_group visorchipset_parahotplug_group = {
.name = "parahotplug",
.attrs = visorchipset_parahotplug_attrs
};
static const struct attribute_group *visorchipset_dev_groups[] = {
&visorchipset_install_group,
&visorchipset_guest_group,
&visorchipset_parahotplug_group,
NULL
};
/* /sys/devices/platform/visorchipset */
static struct platform_device Visorchipset_platform_device = {
.name = "visorchipset",
.id = -1,
.dev.groups = visorchipset_dev_groups,
};
/* Function prototypes */
static void controlvm_respond(CONTROLVM_MESSAGE_HEADER *msgHdr, int response);
static void controlvm_respond_chipset_init(CONTROLVM_MESSAGE_HEADER *msgHdr,
int response,
ULTRA_CHIPSET_FEATURE features);
static void controlvm_respond_physdev_changestate(CONTROLVM_MESSAGE_HEADER *
msgHdr, int response,
ULTRA_SEGMENT_STATE state);
static ssize_t toolaction_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
u8 toolAction;
visorchannel_read(ControlVm_channel,
offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
ToolAction), &toolAction, sizeof(u8));
return scnprintf(buf, PAGE_SIZE, "%u\n", toolAction);
}
static ssize_t toolaction_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
u8 toolAction;
int ret;
if (kstrtou8(buf, 10, &toolAction) != 0)
return -EINVAL;
ret = visorchannel_write(ControlVm_channel,
offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL, ToolAction),
&toolAction, sizeof(u8));
if (ret)
return ret;
return count;
}
static ssize_t boottotool_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
ULTRA_EFI_SPAR_INDICATION efiSparIndication;
visorchannel_read(ControlVm_channel,
offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
EfiSparIndication), &efiSparIndication,
sizeof(ULTRA_EFI_SPAR_INDICATION));
return scnprintf(buf, PAGE_SIZE, "%u\n",
efiSparIndication.BootToTool);
}
static ssize_t boottotool_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int val, ret;
ULTRA_EFI_SPAR_INDICATION efiSparIndication;
if (kstrtoint(buf, 10, &val) != 0)
return -EINVAL;
efiSparIndication.BootToTool = val;
ret = visorchannel_write(ControlVm_channel,
offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
EfiSparIndication),
&(efiSparIndication),
sizeof(ULTRA_EFI_SPAR_INDICATION));
if (ret)
return ret;
return count;
}
static ssize_t error_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
u32 error;
visorchannel_read(ControlVm_channel, offsetof(
ULTRA_CONTROLVM_CHANNEL_PROTOCOL, InstallationError),
&error, sizeof(u32));
return scnprintf(buf, PAGE_SIZE, "%i\n", error);
}
static ssize_t error_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
u32 error;
int ret;
if (kstrtou32(buf, 10, &error) != 0)
return -EINVAL;
ret = visorchannel_write(ControlVm_channel,
offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
InstallationError),
&error, sizeof(u32));
if (ret)
return ret;
return count;
}
static ssize_t textid_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
u32 textId;
visorchannel_read(ControlVm_channel, offsetof(
ULTRA_CONTROLVM_CHANNEL_PROTOCOL, InstallationTextId),
&textId, sizeof(u32));
return scnprintf(buf, PAGE_SIZE, "%i\n", textId);
}
static ssize_t textid_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
u32 textId;
int ret;
if (kstrtou32(buf, 10, &textId) != 0)
return -EINVAL;
ret = visorchannel_write(ControlVm_channel,
offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
InstallationTextId),
&textId, sizeof(u32));
if (ret)
return ret;
return count;
}
static ssize_t remaining_steps_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
u16 remainingSteps;
visorchannel_read(ControlVm_channel,
offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
InstallationRemainingSteps),
&remainingSteps,
sizeof(u16));
return scnprintf(buf, PAGE_SIZE, "%hu\n", remainingSteps);
}
static ssize_t remaining_steps_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
u16 remainingSteps;
int ret;
if (kstrtou16(buf, 10, &remainingSteps) != 0)
return -EINVAL;
ret = visorchannel_write(ControlVm_channel,
offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
InstallationRemainingSteps),
&remainingSteps, sizeof(u16));
if (ret)
return ret;
return count;
}
#if 0
static void
testUnicode(void)
{
wchar_t unicodeString[] = { 'a', 'b', 'c', 0 };
char s[sizeof(unicodeString) * NLS_MAX_CHARSET_SIZE];
wchar_t unicode2[99];
/* NOTE: Either due to a bug, or feature I don't understand, the
* kernel utf8_mbstowcs() and utf_wcstombs() do NOT copy the
* trailed NUL byte!! REALLY!!!!! Arrrrgggghhhhh
*/
LOGINF("sizeof(wchar_t) = %d", sizeof(wchar_t));
LOGINF("utf8_wcstombs=%d",
chrs = utf8_wcstombs(s, unicodeString, sizeof(s)));
if (chrs >= 0)
s[chrs] = '\0'; /* GRRRRRRRR */
LOGINF("s='%s'", s);
LOGINF("utf8_mbstowcs=%d", chrs = utf8_mbstowcs(unicode2, s, 100));
if (chrs >= 0)
unicode2[chrs] = 0; /* GRRRRRRRR */
if (memcmp(unicodeString, unicode2, sizeof(unicodeString)) == 0)
LOGINF("strings match... good");
else
LOGINF("strings did not match!!");
}
#endif
static void
busInfo_clear(void *v)
{
VISORCHIPSET_BUS_INFO *p = (VISORCHIPSET_BUS_INFO *) (v);
if (p->procObject) {
visor_proc_DestroyObject(p->procObject);
p->procObject = NULL;
}
kfree(p->name);
p->name = NULL;
kfree(p->description);
p->description = NULL;
p->state.created = 0;
memset(p, 0, sizeof(VISORCHIPSET_BUS_INFO));
}
static void
devInfo_clear(void *v)
{
VISORCHIPSET_DEVICE_INFO *p = (VISORCHIPSET_DEVICE_INFO *) (v);
p->state.created = 0;
memset(p, 0, sizeof(VISORCHIPSET_DEVICE_INFO));
}
static u8
check_chipset_events(void)
{
int i;
u8 send_msg = 1;
/* Check events to determine if response should be sent */
for (i = 0; i < MAX_CHIPSET_EVENTS; i++)
send_msg &= chipset_events[i];
return send_msg;
}
static void
clear_chipset_events(void)
{
int i;
/* Clear chipset_events */
for (i = 0; i < MAX_CHIPSET_EVENTS; i++)
chipset_events[i] = 0;
}
void
visorchipset_register_busdev_server(VISORCHIPSET_BUSDEV_NOTIFIERS *notifiers,
VISORCHIPSET_BUSDEV_RESPONDERS *responders,
ULTRA_VBUS_DEVICEINFO *driverInfo)
{
down(&NotifierLock);
if (notifiers == NULL) {
memset(&BusDev_Server_Notifiers, 0,
sizeof(BusDev_Server_Notifiers));
serverregistered = 0; /* clear flag */
} else {
BusDev_Server_Notifiers = *notifiers;
serverregistered = 1; /* set flag */
}
if (responders)
*responders = BusDev_Responders;
if (driverInfo)
bus_device_info_init(driverInfo, "chipset", "visorchipset",
VERSION, NULL);
up(&NotifierLock);
}
EXPORT_SYMBOL_GPL(visorchipset_register_busdev_server);
void
visorchipset_register_busdev_client(VISORCHIPSET_BUSDEV_NOTIFIERS *notifiers,
VISORCHIPSET_BUSDEV_RESPONDERS *responders,
ULTRA_VBUS_DEVICEINFO *driverInfo)
{
down(&NotifierLock);
if (notifiers == NULL) {
memset(&BusDev_Client_Notifiers, 0,
sizeof(BusDev_Client_Notifiers));
clientregistered = 0; /* clear flag */
} else {
BusDev_Client_Notifiers = *notifiers;
clientregistered = 1; /* set flag */
}
if (responders)
*responders = BusDev_Responders;
if (driverInfo)
bus_device_info_init(driverInfo, "chipset(bolts)", "visorchipset",
VERSION, NULL);
up(&NotifierLock);
}
EXPORT_SYMBOL_GPL(visorchipset_register_busdev_client);
static void
cleanup_controlvm_structures(void)
{
VISORCHIPSET_BUS_INFO *bi, *tmp_bi;
VISORCHIPSET_DEVICE_INFO *di, *tmp_di;
list_for_each_entry_safe(bi, tmp_bi, &BusInfoList, entry) {
busInfo_clear(bi);
list_del(&bi->entry);
kfree(bi);
}
list_for_each_entry_safe(di, tmp_di, &DevInfoList, entry) {
devInfo_clear(di);
list_del(&di->entry);
kfree(di);
}
}
static void
chipset_init(CONTROLVM_MESSAGE *inmsg)
{
static int chipset_inited;
ULTRA_CHIPSET_FEATURE features = 0;
int rc = CONTROLVM_RESP_SUCCESS;
POSTCODE_LINUX_2(CHIPSET_INIT_ENTRY_PC, POSTCODE_SEVERITY_INFO);
if (chipset_inited) {
LOGERR("CONTROLVM_CHIPSET_INIT Failed: Already Done.");
rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE;
goto Away;
}
chipset_inited = 1;
POSTCODE_LINUX_2(CHIPSET_INIT_EXIT_PC, POSTCODE_SEVERITY_INFO);
/* Set features to indicate we support parahotplug (if Command
* also supports it). */
features =
inmsg->cmd.initChipset.
features & ULTRA_CHIPSET_FEATURE_PARA_HOTPLUG;
/* Set the "reply" bit so Command knows this is a
* features-aware driver. */
features |= ULTRA_CHIPSET_FEATURE_REPLY;
Away:
if (rc < 0)
cleanup_controlvm_structures();
if (inmsg->hdr.Flags.responseExpected)
controlvm_respond_chipset_init(&inmsg->hdr, rc, features);
}
static void
controlvm_init_response(CONTROLVM_MESSAGE *msg,
CONTROLVM_MESSAGE_HEADER *msgHdr, int response)
{
memset(msg, 0, sizeof(CONTROLVM_MESSAGE));
memcpy(&msg->hdr, msgHdr, sizeof(CONTROLVM_MESSAGE_HEADER));
msg->hdr.PayloadBytes = 0;
msg->hdr.PayloadVmOffset = 0;
msg->hdr.PayloadMaxBytes = 0;
if (response < 0) {
msg->hdr.Flags.failed = 1;
msg->hdr.CompletionStatus = (u32) (-response);
}
}
static void
controlvm_respond(CONTROLVM_MESSAGE_HEADER *msgHdr, int response)
{
CONTROLVM_MESSAGE outmsg;
controlvm_init_response(&outmsg, msgHdr, response);
/* For DiagPool channel DEVICE_CHANGESTATE, we need to send
* back the deviceChangeState structure in the packet. */
if (msgHdr->Id == CONTROLVM_DEVICE_CHANGESTATE
&& g_DeviceChangeStatePacket.deviceChangeState.busNo ==
g_diagpoolBusNo
&& g_DeviceChangeStatePacket.deviceChangeState.devNo ==
g_diagpoolDevNo)
outmsg.cmd = g_DeviceChangeStatePacket;
if (outmsg.hdr.Flags.testMessage == 1) {
LOGINF("%s controlvm_msg=0x%x response=%d for test message",
__func__, outmsg.hdr.Id, response);
return;
}
if (!visorchannel_signalinsert(ControlVm_channel,
CONTROLVM_QUEUE_REQUEST, &outmsg)) {
LOGERR("signalinsert failed!");
return;
}
}
static void
controlvm_respond_chipset_init(CONTROLVM_MESSAGE_HEADER *msgHdr, int response,
ULTRA_CHIPSET_FEATURE features)
{
CONTROLVM_MESSAGE outmsg;
controlvm_init_response(&outmsg, msgHdr, response);
outmsg.cmd.initChipset.features = features;
if (!visorchannel_signalinsert(ControlVm_channel,
CONTROLVM_QUEUE_REQUEST, &outmsg)) {
LOGERR("signalinsert failed!");
return;
}
}
static void
controlvm_respond_physdev_changestate(CONTROLVM_MESSAGE_HEADER *msgHdr,
int response, ULTRA_SEGMENT_STATE state)
{
CONTROLVM_MESSAGE outmsg;
controlvm_init_response(&outmsg, msgHdr, response);
outmsg.cmd.deviceChangeState.state = state;
outmsg.cmd.deviceChangeState.flags.physicalDevice = 1;
if (!visorchannel_signalinsert(ControlVm_channel,
CONTROLVM_QUEUE_REQUEST, &outmsg)) {
LOGERR("signalinsert failed!");
return;
}
}
void
visorchipset_save_message(CONTROLVM_MESSAGE *msg, CRASH_OBJ_TYPE type)
{
u32 localSavedCrashMsgOffset;
u16 localSavedCrashMsgCount;
/* get saved message count */
if (visorchannel_read(ControlVm_channel,
offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
SavedCrashMsgCount),
&localSavedCrashMsgCount, sizeof(u16)) < 0) {
LOGERR("failed to get Saved Message Count");
POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC,
POSTCODE_SEVERITY_ERR);
return;
}
if (localSavedCrashMsgCount != CONTROLVM_CRASHMSG_MAX) {
LOGERR("Saved Message Count incorrect %d",
localSavedCrashMsgCount);
POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC,
localSavedCrashMsgCount,
POSTCODE_SEVERITY_ERR);
return;
}
/* get saved crash message offset */
if (visorchannel_read(ControlVm_channel,
offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
SavedCrashMsgOffset),
&localSavedCrashMsgOffset, sizeof(u32)) < 0) {
LOGERR("failed to get Saved Message Offset");
POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC,
POSTCODE_SEVERITY_ERR);
return;
}
if (type == CRASH_bus) {
if (visorchannel_write(ControlVm_channel,
localSavedCrashMsgOffset,
msg, sizeof(CONTROLVM_MESSAGE)) < 0) {
LOGERR("SAVE_MSG_BUS_FAILURE: Failed to write CrashCreateBusMsg!");
POSTCODE_LINUX_2(SAVE_MSG_BUS_FAILURE_PC,
POSTCODE_SEVERITY_ERR);
return;
}
} else {
if (visorchannel_write(ControlVm_channel,
localSavedCrashMsgOffset +
sizeof(CONTROLVM_MESSAGE), msg,
sizeof(CONTROLVM_MESSAGE)) < 0) {
LOGERR("SAVE_MSG_DEV_FAILURE: Failed to write CrashCreateDevMsg!");
POSTCODE_LINUX_2(SAVE_MSG_DEV_FAILURE_PC,
POSTCODE_SEVERITY_ERR);
return;
}
}
}
EXPORT_SYMBOL_GPL(visorchipset_save_message);
static void
bus_responder(CONTROLVM_ID cmdId, ulong busNo, int response)
{
VISORCHIPSET_BUS_INFO *p = NULL;
BOOL need_clear = FALSE;
p = findbus(&BusInfoList, busNo);
if (!p) {
LOGERR("internal error busNo=%lu", busNo);
return;
}
if (response < 0) {
if ((cmdId == CONTROLVM_BUS_CREATE) &&
(response != (-CONTROLVM_RESP_ERROR_ALREADY_DONE)))
/* undo the row we just created... */
delbusdevices(&DevInfoList, busNo);
} else {
if (cmdId == CONTROLVM_BUS_CREATE)
p->state.created = 1;
if (cmdId == CONTROLVM_BUS_DESTROY)
need_clear = TRUE;
}
if (p->pendingMsgHdr.Id == CONTROLVM_INVALID) {
LOGERR("bus_responder no pending msg");
return; /* no controlvm response needed */
}
if (p->pendingMsgHdr.Id != (u32) cmdId) {
LOGERR("expected=%d, found=%d", cmdId, p->pendingMsgHdr.Id);
return;
}
controlvm_respond(&p->pendingMsgHdr, response);
p->pendingMsgHdr.Id = CONTROLVM_INVALID;
if (need_clear) {
busInfo_clear(p);
delbusdevices(&DevInfoList, busNo);
}
}
static void
device_changestate_responder(CONTROLVM_ID cmdId,
ulong busNo, ulong devNo, int response,
ULTRA_SEGMENT_STATE responseState)
{
VISORCHIPSET_DEVICE_INFO *p = NULL;
CONTROLVM_MESSAGE outmsg;
p = finddevice(&DevInfoList, busNo, devNo);
if (!p) {
LOGERR("internal error; busNo=%lu, devNo=%lu", busNo, devNo);
return;
}
if (p->pendingMsgHdr.Id == CONTROLVM_INVALID) {
LOGERR("device_responder no pending msg");
return; /* no controlvm response needed */
}
if (p->pendingMsgHdr.Id != cmdId) {
LOGERR("expected=%d, found=%d", cmdId, p->pendingMsgHdr.Id);
return;
}
controlvm_init_response(&outmsg, &p->pendingMsgHdr, response);
outmsg.cmd.deviceChangeState.busNo = busNo;
outmsg.cmd.deviceChangeState.devNo = devNo;
outmsg.cmd.deviceChangeState.state = responseState;
if (!visorchannel_signalinsert(ControlVm_channel,
CONTROLVM_QUEUE_REQUEST, &outmsg)) {
LOGERR("signalinsert failed!");
return;
}
p->pendingMsgHdr.Id = CONTROLVM_INVALID;
}
static void
device_responder(CONTROLVM_ID cmdId, ulong busNo, ulong devNo, int response)
{
VISORCHIPSET_DEVICE_INFO *p = NULL;
BOOL need_clear = FALSE;
p = finddevice(&DevInfoList, busNo, devNo);
if (!p) {
LOGERR("internal error; busNo=%lu, devNo=%lu", busNo, devNo);
return;
}
if (response >= 0) {
if (cmdId == CONTROLVM_DEVICE_CREATE)
p->state.created = 1;
if (cmdId == CONTROLVM_DEVICE_DESTROY)
need_clear = TRUE;
}
if (p->pendingMsgHdr.Id == CONTROLVM_INVALID) {
LOGERR("device_responder no pending msg");
return; /* no controlvm response needed */
}
if (p->pendingMsgHdr.Id != (u32) cmdId) {
LOGERR("expected=%d, found=%d", cmdId, p->pendingMsgHdr.Id);
return;
}
controlvm_respond(&p->pendingMsgHdr, response);
p->pendingMsgHdr.Id = CONTROLVM_INVALID;
if (need_clear)
devInfo_clear(p);
}
static void
bus_epilog(u32 busNo,
u32 cmd, CONTROLVM_MESSAGE_HEADER *msgHdr,
int response, BOOL needResponse)
{
BOOL notified = FALSE;
VISORCHIPSET_BUS_INFO *pBusInfo = findbus(&BusInfoList, busNo);
if (!pBusInfo) {
LOGERR("HUH? bad busNo=%d", busNo);
return;
}
if (needResponse) {
memcpy(&pBusInfo->pendingMsgHdr, msgHdr,
sizeof(CONTROLVM_MESSAGE_HEADER));
} else
pBusInfo->pendingMsgHdr.Id = CONTROLVM_INVALID;
down(&NotifierLock);
if (response == CONTROLVM_RESP_SUCCESS) {
switch (cmd) {
case CONTROLVM_BUS_CREATE:
/* We can't tell from the bus_create
* information which of our 2 bus flavors the
* devices on this bus will ultimately end up.
* FORTUNATELY, it turns out it is harmless to
* send the bus_create to both of them. We can
* narrow things down a little bit, though,
* because we know: - BusDev_Server can handle
* either server or client devices
* - BusDev_Client can handle ONLY client
* devices */
if (BusDev_Server_Notifiers.bus_create) {
(*BusDev_Server_Notifiers.bus_create) (busNo);
notified = TRUE;
}
if ((!pBusInfo->flags.server) /*client */ &&
BusDev_Client_Notifiers.bus_create) {
(*BusDev_Client_Notifiers.bus_create) (busNo);
notified = TRUE;
}
break;
case CONTROLVM_BUS_DESTROY:
if (BusDev_Server_Notifiers.bus_destroy) {
(*BusDev_Server_Notifiers.bus_destroy) (busNo);
notified = TRUE;
}
if ((!pBusInfo->flags.server) /*client */ &&
BusDev_Client_Notifiers.bus_destroy) {
(*BusDev_Client_Notifiers.bus_destroy) (busNo);
notified = TRUE;
}
break;
}
}
if (notified)
/* The callback function just called above is responsible
* for calling the appropriate VISORCHIPSET_BUSDEV_RESPONDERS
* function, which will call bus_responder()
*/
;
else
bus_responder(cmd, busNo, response);
up(&NotifierLock);
}
static void
device_epilog(u32 busNo, u32 devNo, ULTRA_SEGMENT_STATE state, u32 cmd,
CONTROLVM_MESSAGE_HEADER *msgHdr, int response,
BOOL needResponse, BOOL for_visorbus)
{
VISORCHIPSET_BUSDEV_NOTIFIERS *notifiers = NULL;
BOOL notified = FALSE;
VISORCHIPSET_DEVICE_INFO *pDevInfo =
finddevice(&DevInfoList, busNo, devNo);
char *envp[] = {
"SPARSP_DIAGPOOL_PAUSED_STATE = 1",
NULL
};
if (!pDevInfo) {
LOGERR("HUH? bad busNo=%d, devNo=%d", busNo, devNo);
return;
}
if (for_visorbus)
notifiers = &BusDev_Server_Notifiers;
else
notifiers = &BusDev_Client_Notifiers;
if (needResponse) {
memcpy(&pDevInfo->pendingMsgHdr, msgHdr,
sizeof(CONTROLVM_MESSAGE_HEADER));
} else
pDevInfo->pendingMsgHdr.Id = CONTROLVM_INVALID;
down(&NotifierLock);
if (response >= 0) {
switch (cmd) {
case CONTROLVM_DEVICE_CREATE:
if (notifiers->device_create) {
(*notifiers->device_create) (busNo, devNo);
notified = TRUE;
}
break;
case CONTROLVM_DEVICE_CHANGESTATE:
/* ServerReady / ServerRunning / SegmentStateRunning */
if (state.Alive == SegmentStateRunning.Alive &&
state.Operating == SegmentStateRunning.Operating) {
if (notifiers->device_resume) {
(*notifiers->device_resume) (busNo,
devNo);
notified = TRUE;
}
}
/* ServerNotReady / ServerLost / SegmentStateStandby */
else if (state.Alive == SegmentStateStandby.Alive &&
state.Operating ==
SegmentStateStandby.Operating) {
/* technically this is standby case
* where server is lost
*/
if (notifiers->device_pause) {
(*notifiers->device_pause) (busNo,
devNo);
notified = TRUE;
}
} else if (state.Alive == SegmentStatePaused.Alive &&
state.Operating ==
SegmentStatePaused.Operating) {
/* this is lite pause where channel is
* still valid just 'pause' of it
*/
if (busNo == g_diagpoolBusNo
&& devNo == g_diagpoolDevNo) {
LOGINF("DEVICE_CHANGESTATE(DiagpoolChannel busNo=%d devNo=%d is pausing...)",
busNo, devNo);
/* this will trigger the
* diag_shutdown.sh script in
* the visorchipset hotplug */
kobject_uevent_env
(&Visorchipset_platform_device.dev.
kobj, KOBJ_ONLINE, envp);
}
}
break;
case CONTROLVM_DEVICE_DESTROY:
if (notifiers->device_destroy) {
(*notifiers->device_destroy) (busNo, devNo);
notified = TRUE;
}
break;
}
}
if (notified)
/* The callback function just called above is responsible
* for calling the appropriate VISORCHIPSET_BUSDEV_RESPONDERS
* function, which will call device_responder()
*/
;
else
device_responder(cmd, busNo, devNo, response);
up(&NotifierLock);
}
static void
bus_create(CONTROLVM_MESSAGE *inmsg)
{
CONTROLVM_MESSAGE_PACKET *cmd = &inmsg->cmd;
ulong busNo = cmd->createBus.busNo;
int rc = CONTROLVM_RESP_SUCCESS;
VISORCHIPSET_BUS_INFO *pBusInfo = NULL;
pBusInfo = findbus(&BusInfoList, busNo);
if (pBusInfo && (pBusInfo->state.created == 1)) {
LOGERR("CONTROLVM_BUS_CREATE Failed: bus %lu already exists",
busNo);
POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, busNo,
POSTCODE_SEVERITY_ERR);
rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE;
goto Away;
}
pBusInfo = kzalloc(sizeof(VISORCHIPSET_BUS_INFO), GFP_KERNEL);
if (pBusInfo == NULL) {
LOGERR("CONTROLVM_BUS_CREATE Failed: bus %lu kzalloc failed",
busNo);
POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, busNo,
POSTCODE_SEVERITY_ERR);
rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED;
goto Away;
}
INIT_LIST_HEAD(&pBusInfo->entry);
pBusInfo->busNo = busNo;
pBusInfo->devNo = cmd->createBus.deviceCount;
POSTCODE_LINUX_3(BUS_CREATE_ENTRY_PC, busNo, POSTCODE_SEVERITY_INFO);
if (inmsg->hdr.Flags.testMessage == 1)
pBusInfo->chanInfo.addrType = ADDRTYPE_localTest;
else
pBusInfo->chanInfo.addrType = ADDRTYPE_localPhysical;
pBusInfo->flags.server = inmsg->hdr.Flags.server;
pBusInfo->chanInfo.channelAddr = cmd->createBus.channelAddr;
pBusInfo->chanInfo.nChannelBytes = cmd->createBus.channelBytes;
pBusInfo->chanInfo.channelTypeGuid = cmd->createBus.busDataTypeGuid;
pBusInfo->chanInfo.channelInstGuid = cmd->createBus.busInstGuid;
list_add(&pBusInfo->entry, &BusInfoList);
POSTCODE_LINUX_3(BUS_CREATE_EXIT_PC, busNo, POSTCODE_SEVERITY_INFO);
Away:
bus_epilog(busNo, CONTROLVM_BUS_CREATE, &inmsg->hdr,
rc, inmsg->hdr.Flags.responseExpected == 1);
}
static void
bus_destroy(CONTROLVM_MESSAGE *inmsg)
{
CONTROLVM_MESSAGE_PACKET *cmd = &inmsg->cmd;
ulong busNo = cmd->destroyBus.busNo;
VISORCHIPSET_BUS_INFO *pBusInfo;
int rc = CONTROLVM_RESP_SUCCESS;
pBusInfo = findbus(&BusInfoList, busNo);
if (!pBusInfo) {
LOGERR("CONTROLVM_BUS_DESTROY Failed: bus %lu invalid", busNo);
rc = -CONTROLVM_RESP_ERROR_BUS_INVALID;
goto Away;
}
if (pBusInfo->state.created == 0) {
LOGERR("CONTROLVM_BUS_DESTROY Failed: bus %lu already destroyed",
busNo);
rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE;
goto Away;
}
Away:
bus_epilog(busNo, CONTROLVM_BUS_DESTROY, &inmsg->hdr,
rc, inmsg->hdr.Flags.responseExpected == 1);
}
static void
bus_configure(CONTROLVM_MESSAGE *inmsg, PARSER_CONTEXT *parser_ctx)
{
CONTROLVM_MESSAGE_PACKET *cmd = &inmsg->cmd;
ulong busNo = cmd->configureBus.busNo;
VISORCHIPSET_BUS_INFO *pBusInfo = NULL;
int rc = CONTROLVM_RESP_SUCCESS;
char s[99];
busNo = cmd->configureBus.busNo;
POSTCODE_LINUX_3(BUS_CONFIGURE_ENTRY_PC, busNo, POSTCODE_SEVERITY_INFO);
pBusInfo = findbus(&BusInfoList, busNo);
if (!pBusInfo) {
LOGERR("CONTROLVM_BUS_CONFIGURE Failed: bus %lu invalid",
busNo);
POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, busNo,
POSTCODE_SEVERITY_ERR);
rc = -CONTROLVM_RESP_ERROR_BUS_INVALID;
goto Away;
}
if (pBusInfo->state.created == 0) {
LOGERR("CONTROLVM_BUS_CONFIGURE Failed: Invalid bus %lu - not created yet",
busNo);
POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, busNo,
POSTCODE_SEVERITY_ERR);
rc = -CONTROLVM_RESP_ERROR_BUS_INVALID;
goto Away;
}
/* TBD - add this check to other commands also... */
if (pBusInfo->pendingMsgHdr.Id != CONTROLVM_INVALID) {
LOGERR("CONTROLVM_BUS_CONFIGURE Failed: bus %lu MsgId=%u outstanding",
busNo, (uint) pBusInfo->pendingMsgHdr.Id);
POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, busNo,
POSTCODE_SEVERITY_ERR);
rc = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT;
goto Away;
}
pBusInfo->partitionHandle = cmd->configureBus.guestHandle;
pBusInfo->partitionGuid = parser_id_get(parser_ctx);
parser_param_start(parser_ctx, PARSERSTRING_NAME);
pBusInfo->name = parser_string_get(parser_ctx);
visorchannel_uuid_id(&pBusInfo->partitionGuid, s);
POSTCODE_LINUX_3(BUS_CONFIGURE_EXIT_PC, busNo, POSTCODE_SEVERITY_INFO);
Away:
bus_epilog(busNo, CONTROLVM_BUS_CONFIGURE, &inmsg->hdr,
rc, inmsg->hdr.Flags.responseExpected == 1);
}
static void
my_device_create(CONTROLVM_MESSAGE *inmsg)
{
CONTROLVM_MESSAGE_PACKET *cmd = &inmsg->cmd;
ulong busNo = cmd->createDevice.busNo;
ulong devNo = cmd->createDevice.devNo;
VISORCHIPSET_DEVICE_INFO *pDevInfo = NULL;
VISORCHIPSET_BUS_INFO *pBusInfo = NULL;
int rc = CONTROLVM_RESP_SUCCESS;
pDevInfo = finddevice(&DevInfoList, busNo, devNo);
if (pDevInfo && (pDevInfo->state.created == 1)) {
LOGERR("CONTROLVM_DEVICE_CREATE Failed: busNo=%lu, devNo=%lu already exists",
busNo, devNo);
POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, devNo, busNo,
POSTCODE_SEVERITY_ERR);
rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE;
goto Away;
}
pBusInfo = findbus(&BusInfoList, busNo);
if (!pBusInfo) {
LOGERR("CONTROLVM_DEVICE_CREATE Failed: Invalid bus %lu - out of range",
busNo);
POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, devNo, busNo,
POSTCODE_SEVERITY_ERR);
rc = -CONTROLVM_RESP_ERROR_BUS_INVALID;
goto Away;
}
if (pBusInfo->state.created == 0) {
LOGERR("CONTROLVM_DEVICE_CREATE Failed: Invalid bus %lu - not created yet",
busNo);
POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, devNo, busNo,
POSTCODE_SEVERITY_ERR);
rc = -CONTROLVM_RESP_ERROR_BUS_INVALID;
goto Away;
}
pDevInfo = kzalloc(sizeof(VISORCHIPSET_DEVICE_INFO), GFP_KERNEL);
if (pDevInfo == NULL) {
LOGERR("CONTROLVM_DEVICE_CREATE Failed: busNo=%lu, devNo=%lu kmaloc failed",
busNo, devNo);
POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, devNo, busNo,
POSTCODE_SEVERITY_ERR);
rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED;
goto Away;
}
INIT_LIST_HEAD(&pDevInfo->entry);
pDevInfo->busNo = busNo;
pDevInfo->devNo = devNo;
pDevInfo->devInstGuid = cmd->createDevice.devInstGuid;
POSTCODE_LINUX_4(DEVICE_CREATE_ENTRY_PC, devNo, busNo,
POSTCODE_SEVERITY_INFO);
if (inmsg->hdr.Flags.testMessage == 1)
pDevInfo->chanInfo.addrType = ADDRTYPE_localTest;
else
pDevInfo->chanInfo.addrType = ADDRTYPE_localPhysical;
pDevInfo->chanInfo.channelAddr = cmd->createDevice.channelAddr;
pDevInfo->chanInfo.nChannelBytes = cmd->createDevice.channelBytes;
pDevInfo->chanInfo.channelTypeGuid = cmd->createDevice.dataTypeGuid;
pDevInfo->chanInfo.intr = cmd->createDevice.intr;
list_add(&pDevInfo->entry, &DevInfoList);
POSTCODE_LINUX_4(DEVICE_CREATE_EXIT_PC, devNo, busNo,
POSTCODE_SEVERITY_INFO);
Away:
/* get the bus and devNo for DiagPool channel */
if (is_diagpool_channel(pDevInfo->chanInfo.channelTypeGuid)) {
g_diagpoolBusNo = busNo;
g_diagpoolDevNo = devNo;
LOGINF("CONTROLVM_DEVICE_CREATE for DiagPool channel: busNo=%lu, devNo=%lu",
g_diagpoolBusNo, g_diagpoolDevNo);
}
device_epilog(busNo, devNo, SegmentStateRunning,
CONTROLVM_DEVICE_CREATE, &inmsg->hdr, rc,
inmsg->hdr.Flags.responseExpected == 1,
FOR_VISORBUS(pDevInfo->chanInfo.channelTypeGuid));
}
static void
my_device_changestate(CONTROLVM_MESSAGE *inmsg)
{
CONTROLVM_MESSAGE_PACKET *cmd = &inmsg->cmd;
ulong busNo = cmd->deviceChangeState.busNo;
ulong devNo = cmd->deviceChangeState.devNo;
ULTRA_SEGMENT_STATE state = cmd->deviceChangeState.state;
VISORCHIPSET_DEVICE_INFO *pDevInfo = NULL;
int rc = CONTROLVM_RESP_SUCCESS;
pDevInfo = finddevice(&DevInfoList, busNo, devNo);
if (!pDevInfo) {
LOGERR("CONTROLVM_DEVICE_CHANGESTATE Failed: busNo=%lu, devNo=%lu invalid (doesn't exist)",
busNo, devNo);
POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, devNo, busNo,
POSTCODE_SEVERITY_ERR);
rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID;
goto Away;
}
if (pDevInfo->state.created == 0) {
LOGERR("CONTROLVM_DEVICE_CHANGESTATE Failed: busNo=%lu, devNo=%lu invalid (not created)",
busNo, devNo);
POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, devNo, busNo,
POSTCODE_SEVERITY_ERR);
rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID;
}
Away:
if ((rc >= CONTROLVM_RESP_SUCCESS) && pDevInfo)
device_epilog(busNo, devNo, state, CONTROLVM_DEVICE_CHANGESTATE,
&inmsg->hdr, rc,
inmsg->hdr.Flags.responseExpected == 1,
FOR_VISORBUS(pDevInfo->chanInfo.channelTypeGuid));
}
static void
my_device_destroy(CONTROLVM_MESSAGE *inmsg)
{
CONTROLVM_MESSAGE_PACKET *cmd = &inmsg->cmd;
ulong busNo = cmd->destroyDevice.busNo;
ulong devNo = cmd->destroyDevice.devNo;
VISORCHIPSET_DEVICE_INFO *pDevInfo = NULL;
int rc = CONTROLVM_RESP_SUCCESS;
pDevInfo = finddevice(&DevInfoList, busNo, devNo);
if (!pDevInfo) {
LOGERR("CONTROLVM_DEVICE_DESTROY Failed: busNo=%lu, devNo=%lu invalid",
busNo, devNo);
rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID;
goto Away;
}
if (pDevInfo->state.created == 0) {
LOGERR("CONTROLVM_DEVICE_DESTROY Failed: busNo=%lu, devNo=%lu already destroyed",
busNo, devNo);
rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE;
}
Away:
if ((rc >= CONTROLVM_RESP_SUCCESS) && pDevInfo)
device_epilog(busNo, devNo, SegmentStateRunning,
CONTROLVM_DEVICE_DESTROY, &inmsg->hdr, rc,
inmsg->hdr.Flags.responseExpected == 1,
FOR_VISORBUS(pDevInfo->chanInfo.channelTypeGuid));
}
/* When provided with the physical address of the controlvm channel
* (phys_addr), the offset to the payload area we need to manage
* (offset), and the size of this payload area (bytes), fills in the
* CONTROLVM_PAYLOAD_INFO struct. Returns TRUE for success or FALSE
* for failure.
*/
static int
initialize_controlvm_payload_info(HOSTADDRESS phys_addr, u64 offset, u32 bytes,
CONTROLVM_PAYLOAD_INFO *info)
{
u8 __iomem *payload = NULL;
int rc = CONTROLVM_RESP_SUCCESS;
if (info == NULL) {
LOGERR("HUH ? CONTROLVM_PAYLOAD_INIT Failed : Programmer check at %s:%d",
__FILE__, __LINE__);
rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID;
goto Away;
}
memset(info, 0, sizeof(CONTROLVM_PAYLOAD_INFO));
if ((offset == 0) || (bytes == 0)) {
LOGERR("CONTROLVM_PAYLOAD_INIT Failed: RequestPayloadOffset=%llu RequestPayloadBytes=%llu!",
(u64) offset, (u64) bytes);
rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID;
goto Away;
}
payload = ioremap_cache(phys_addr + offset, bytes);
if (payload == NULL) {
LOGERR("CONTROLVM_PAYLOAD_INIT Failed: ioremap_cache %llu for %llu bytes failed",
(u64) offset, (u64) bytes);
rc = -CONTROLVM_RESP_ERROR_IOREMAP_FAILED;
goto Away;
}
info->offset = offset;
info->bytes = bytes;
info->ptr = payload;
LOGINF("offset=%llu, bytes=%lu, ptr=%p",
(u64) (info->offset), (ulong) (info->bytes), info->ptr);
Away:
if (rc < 0) {
if (payload != NULL) {
iounmap(payload);
payload = NULL;
}
}
return rc;
}
static void
destroy_controlvm_payload_info(CONTROLVM_PAYLOAD_INFO *info)
{
if (info->ptr != NULL) {
iounmap(info->ptr);
info->ptr = NULL;
}
memset(info, 0, sizeof(CONTROLVM_PAYLOAD_INFO));
}
static void
initialize_controlvm_payload(void)
{
HOSTADDRESS phys_addr = visorchannel_get_physaddr(ControlVm_channel);
u64 payloadOffset = 0;
u32 payloadBytes = 0;
if (visorchannel_read(ControlVm_channel,
offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
RequestPayloadOffset),
&payloadOffset, sizeof(payloadOffset)) < 0) {
LOGERR("CONTROLVM_PAYLOAD_INIT Failed to read controlvm channel!");
POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC,
POSTCODE_SEVERITY_ERR);
return;
}
if (visorchannel_read(ControlVm_channel,
offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
RequestPayloadBytes),
&payloadBytes, sizeof(payloadBytes)) < 0) {
LOGERR("CONTROLVM_PAYLOAD_INIT Failed to read controlvm channel!");
POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC,
POSTCODE_SEVERITY_ERR);
return;
}
initialize_controlvm_payload_info(phys_addr,
payloadOffset, payloadBytes,
&ControlVm_payload_info);
}
/* Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset.
* Returns CONTROLVM_RESP_xxx code.
*/
int
visorchipset_chipset_ready(void)
{
kobject_uevent(&Visorchipset_platform_device.dev.kobj, KOBJ_ONLINE);
return CONTROLVM_RESP_SUCCESS;
}
EXPORT_SYMBOL_GPL(visorchipset_chipset_ready);
int
visorchipset_chipset_selftest(void)
{
char env_selftest[20];
char *envp[] = { env_selftest, NULL };
sprintf(env_selftest, "SPARSP_SELFTEST=%d", 1);
kobject_uevent_env(&Visorchipset_platform_device.dev.kobj, KOBJ_CHANGE,
envp);
return CONTROLVM_RESP_SUCCESS;
}
EXPORT_SYMBOL_GPL(visorchipset_chipset_selftest);
/* Send ACTION=offline for DEVPATH=/sys/devices/platform/visorchipset.
* Returns CONTROLVM_RESP_xxx code.
*/
int
visorchipset_chipset_notready(void)
{
kobject_uevent(&Visorchipset_platform_device.dev.kobj, KOBJ_OFFLINE);
return CONTROLVM_RESP_SUCCESS;
}
EXPORT_SYMBOL_GPL(visorchipset_chipset_notready);
static void
chipset_ready(CONTROLVM_MESSAGE_HEADER *msgHdr)
{
int rc = visorchipset_chipset_ready();
if (rc != CONTROLVM_RESP_SUCCESS)
rc = -rc;
if (msgHdr->Flags.responseExpected && !visorchipset_holdchipsetready)
controlvm_respond(msgHdr, rc);
if (msgHdr->Flags.responseExpected && visorchipset_holdchipsetready) {
/* Send CHIPSET_READY response when all modules have been loaded
* and disks mounted for the partition
*/
g_ChipSetMsgHdr = *msgHdr;
LOGINF("Holding CHIPSET_READY response");
}
}
static void
chipset_selftest(CONTROLVM_MESSAGE_HEADER *msgHdr)
{
int rc = visorchipset_chipset_selftest();
if (rc != CONTROLVM_RESP_SUCCESS)
rc = -rc;
if (msgHdr->Flags.responseExpected)
controlvm_respond(msgHdr, rc);
}
static void
chipset_notready(CONTROLVM_MESSAGE_HEADER *msgHdr)
{
int rc = visorchipset_chipset_notready();
if (rc != CONTROLVM_RESP_SUCCESS)
rc = -rc;
if (msgHdr->Flags.responseExpected)
controlvm_respond(msgHdr, rc);
}
/* This is your "one-stop" shop for grabbing the next message from the
* CONTROLVM_QUEUE_EVENT queue in the controlvm channel.
*/
static BOOL
read_controlvm_event(CONTROLVM_MESSAGE *msg)
{
if (visorchannel_signalremove(ControlVm_channel,
CONTROLVM_QUEUE_EVENT, msg)) {
/* got a message */
if (msg->hdr.Flags.testMessage == 1) {
LOGERR("ignoring bad CONTROLVM_QUEUE_EVENT msg with controlvm_msg_id=0x%x because Flags.testMessage is nonsensical (=1)", msg->hdr.Id);
return FALSE;
}
return TRUE;
}
return FALSE;
}
/*
* The general parahotplug flow works as follows. The visorchipset
* driver receives a DEVICE_CHANGESTATE message from Command
* specifying a physical device to enable or disable. The CONTROLVM
* message handler calls parahotplug_process_message, which then adds
* the message to a global list and kicks off a udev event which
* causes a user level script to enable or disable the specified
* device. The udev script then writes to
* /proc/visorchipset/parahotplug, which causes parahotplug_proc_write
* to get called, at which point the appropriate CONTROLVM message is
* retrieved from the list and responded to.
*/
#define PARAHOTPLUG_TIMEOUT_MS 2000
/*
* Generate unique int to match an outstanding CONTROLVM message with a
* udev script /proc response
*/
static int
parahotplug_next_id(void)
{
static atomic_t id = ATOMIC_INIT(0);
return atomic_inc_return(&id);
}
/*
* Returns the time (in jiffies) when a CONTROLVM message on the list
* should expire -- PARAHOTPLUG_TIMEOUT_MS in the future
*/
static unsigned long
parahotplug_next_expiration(void)
{
return jiffies + PARAHOTPLUG_TIMEOUT_MS * HZ / 1000;
}
/*
* Create a parahotplug_request, which is basically a wrapper for a
* CONTROLVM_MESSAGE that we can stick on a list
*/
static struct parahotplug_request *
parahotplug_request_create(CONTROLVM_MESSAGE *msg)
{
struct parahotplug_request *req =
kmalloc(sizeof(struct parahotplug_request),
GFP_KERNEL|__GFP_NORETRY);
if (req == NULL)
return NULL;
req->id = parahotplug_next_id();
req->expiration = parahotplug_next_expiration();
req->msg = *msg;
return req;
}
/*
* Free a parahotplug_request.
*/
static void
parahotplug_request_destroy(struct parahotplug_request *req)
{
kfree(req);
}
/*
* Cause uevent to run the user level script to do the disable/enable
* specified in (the CONTROLVM message in) the specified
* parahotplug_request
*/
static void
parahotplug_request_kickoff(struct parahotplug_request *req)
{
CONTROLVM_MESSAGE_PACKET *cmd = &req->msg.cmd;
char env_cmd[40], env_id[40], env_state[40], env_bus[40], env_dev[40],
env_func[40];
char *envp[] = {
env_cmd, env_id, env_state, env_bus, env_dev, env_func, NULL
};
sprintf(env_cmd, "SPAR_PARAHOTPLUG=1");
sprintf(env_id, "SPAR_PARAHOTPLUG_ID=%d", req->id);
sprintf(env_state, "SPAR_PARAHOTPLUG_STATE=%d",
cmd->deviceChangeState.state.Active);
sprintf(env_bus, "SPAR_PARAHOTPLUG_BUS=%d",
cmd->deviceChangeState.busNo);
sprintf(env_dev, "SPAR_PARAHOTPLUG_DEVICE=%d",
cmd->deviceChangeState.devNo >> 3);
sprintf(env_func, "SPAR_PARAHOTPLUG_FUNCTION=%d",
cmd->deviceChangeState.devNo & 0x7);
LOGINF("parahotplug_request_kickoff: state=%d, bdf=%d/%d/%d, id=%u\n",
cmd->deviceChangeState.state.Active,
cmd->deviceChangeState.busNo, cmd->deviceChangeState.devNo >> 3,
cmd->deviceChangeState.devNo & 7, req->id);
kobject_uevent_env(&Visorchipset_platform_device.dev.kobj, KOBJ_CHANGE,
envp);
}
/*
* Remove any request from the list that's been on there too long and
* respond with an error.
*/
static void
parahotplug_process_list(void)
{
struct list_head *pos = NULL;
struct list_head *tmp = NULL;
spin_lock(&Parahotplug_request_list_lock);
list_for_each_safe(pos, tmp, &Parahotplug_request_list) {
struct parahotplug_request *req =
list_entry(pos, struct parahotplug_request, list);
if (time_after_eq(jiffies, req->expiration)) {
list_del(pos);
if (req->msg.hdr.Flags.responseExpected)
controlvm_respond_physdev_changestate(
&req->msg.hdr,
CONTROLVM_RESP_ERROR_DEVICE_UDEV_TIMEOUT,
req->msg.cmd.deviceChangeState.state);
parahotplug_request_destroy(req);
}
}
spin_unlock(&Parahotplug_request_list_lock);
}
/*
* Called from the /proc handler, which means the user script has
* finished the enable/disable. Find the matching identifier, and
* respond to the CONTROLVM message with success.
*/
static int
parahotplug_request_complete(int id, u16 active)
{
struct list_head *pos = NULL;
struct list_head *tmp = NULL;
spin_lock(&Parahotplug_request_list_lock);
/* Look for a request matching "id". */
list_for_each_safe(pos, tmp, &Parahotplug_request_list) {
struct parahotplug_request *req =
list_entry(pos, struct parahotplug_request, list);
if (req->id == id) {
/* Found a match. Remove it from the list and
* respond.
*/
list_del(pos);
spin_unlock(&Parahotplug_request_list_lock);
req->msg.cmd.deviceChangeState.state.Active = active;
if (req->msg.hdr.Flags.responseExpected)
controlvm_respond_physdev_changestate(
&req->msg.hdr, CONTROLVM_RESP_SUCCESS,
req->msg.cmd.deviceChangeState.state);
parahotplug_request_destroy(req);
return 0;
}
}
spin_unlock(&Parahotplug_request_list_lock);
return -1;
}
/*
* Enables or disables a PCI device by kicking off a udev script
*/
static void
parahotplug_process_message(CONTROLVM_MESSAGE *inmsg)
{
struct parahotplug_request *req;
req = parahotplug_request_create(inmsg);
if (req == NULL) {
LOGERR("parahotplug_process_message: couldn't allocate request");
return;
}
if (inmsg->cmd.deviceChangeState.state.Active) {
/* For enable messages, just respond with success
* right away. This is a bit of a hack, but there are
* issues with the early enable messages we get (with
* either the udev script not detecting that the device
* is up, or not getting called at all). Fortunately
* the messages that get lost don't matter anyway, as
* devices are automatically enabled at
* initialization.
*/
parahotplug_request_kickoff(req);
controlvm_respond_physdev_changestate(&inmsg->hdr,
CONTROLVM_RESP_SUCCESS,
inmsg->cmd.
deviceChangeState.state);
parahotplug_request_destroy(req);
} else {
/* For disable messages, add the request to the
* request list before kicking off the udev script. It
* won't get responded to until the script has
* indicated it's done.
*/
spin_lock(&Parahotplug_request_list_lock);
list_add_tail(&(req->list), &Parahotplug_request_list);
spin_unlock(&Parahotplug_request_list_lock);
parahotplug_request_kickoff(req);
}
}
/* Process a controlvm message.
* Return result:
* FALSE - this function will return FALSE only in the case where the
* controlvm message was NOT processed, but processing must be
* retried before reading the next controlvm message; a
* scenario where this can occur is when we need to throttle
* the allocation of memory in which to copy out controlvm
* payload data
* TRUE - processing of the controlvm message completed,
* either successfully or with an error.
*/
static BOOL
handle_command(CONTROLVM_MESSAGE inmsg, HOSTADDRESS channel_addr)
{
CONTROLVM_MESSAGE_PACKET *cmd = &inmsg.cmd;
u64 parametersAddr = 0;
u32 parametersBytes = 0;
PARSER_CONTEXT *parser_ctx = NULL;
BOOL isLocalAddr = FALSE;
CONTROLVM_MESSAGE ackmsg;
/* create parsing context if necessary */
isLocalAddr = (inmsg.hdr.Flags.testMessage == 1);
if (channel_addr == 0) {
LOGERR("HUH? channel_addr is 0!");
return TRUE;
}
parametersAddr = channel_addr + inmsg.hdr.PayloadVmOffset;
parametersBytes = inmsg.hdr.PayloadBytes;
/* Parameter and channel addresses within test messages actually lie
* within our OS-controlled memory. We need to know that, because it
* makes a difference in how we compute the virtual address.
*/
if (parametersAddr != 0 && parametersBytes != 0) {
BOOL retry = FALSE;
parser_ctx =
parser_init_byteStream(parametersAddr, parametersBytes,
isLocalAddr, &retry);
if (!parser_ctx) {
if (retry) {
LOGWRN("throttling to copy payload");
return FALSE;
}
LOGWRN("parsing failed");
LOGWRN("inmsg.hdr.Id=0x%lx", (ulong) inmsg.hdr.Id);
LOGWRN("parametersAddr=0x%llx", (u64) parametersAddr);
LOGWRN("parametersBytes=%lu", (ulong) parametersBytes);
LOGWRN("isLocalAddr=%d", isLocalAddr);
}
}
if (!isLocalAddr) {
controlvm_init_response(&ackmsg, &inmsg.hdr,
CONTROLVM_RESP_SUCCESS);
if ((ControlVm_channel)
&&
(!visorchannel_signalinsert
(ControlVm_channel, CONTROLVM_QUEUE_ACK, &ackmsg)))
LOGWRN("failed to send ACK failed");
}
switch (inmsg.hdr.Id) {
case CONTROLVM_CHIPSET_INIT:
LOGINF("CHIPSET_INIT(#busses=%lu,#switches=%lu)",
(ulong) inmsg.cmd.initChipset.busCount,
(ulong) inmsg.cmd.initChipset.switchCount);
chipset_init(&inmsg);
break;
case CONTROLVM_BUS_CREATE:
LOGINF("BUS_CREATE(%lu,#devs=%lu)",
(ulong) cmd->createBus.busNo,
(ulong) cmd->createBus.deviceCount);
bus_create(&inmsg);
break;
case CONTROLVM_BUS_DESTROY:
LOGINF("BUS_DESTROY(%lu)", (ulong) cmd->destroyBus.busNo);
bus_destroy(&inmsg);
break;
case CONTROLVM_BUS_CONFIGURE:
LOGINF("BUS_CONFIGURE(%lu)", (ulong) cmd->configureBus.busNo);
bus_configure(&inmsg, parser_ctx);
break;
case CONTROLVM_DEVICE_CREATE:
LOGINF("DEVICE_CREATE(%lu,%lu)",
(ulong) cmd->createDevice.busNo,
(ulong) cmd->createDevice.devNo);
my_device_create(&inmsg);
break;
case CONTROLVM_DEVICE_CHANGESTATE:
if (cmd->deviceChangeState.flags.physicalDevice) {
LOGINF("DEVICE_CHANGESTATE for physical device (%lu,%lu, active=%lu)",
(ulong) cmd->deviceChangeState.busNo,
(ulong) cmd->deviceChangeState.devNo,
(ulong) cmd->deviceChangeState.state.Active);
parahotplug_process_message(&inmsg);
} else {
LOGINF("DEVICE_CHANGESTATE for virtual device (%lu,%lu, state.Alive=0x%lx)",
(ulong) cmd->deviceChangeState.busNo,
(ulong) cmd->deviceChangeState.devNo,
(ulong) cmd->deviceChangeState.state.Alive);
/* save the hdr and cmd structures for later use */
/* when sending back the response to Command */
my_device_changestate(&inmsg);
g_DiagMsgHdr = inmsg.hdr;
g_DeviceChangeStatePacket = inmsg.cmd;
break;
}
break;
case CONTROLVM_DEVICE_DESTROY:
LOGINF("DEVICE_DESTROY(%lu,%lu)",
(ulong) cmd->destroyDevice.busNo,
(ulong) cmd->destroyDevice.devNo);
my_device_destroy(&inmsg);
break;
case CONTROLVM_DEVICE_CONFIGURE:
LOGINF("DEVICE_CONFIGURE(%lu,%lu)",
(ulong) cmd->configureDevice.busNo,
(ulong) cmd->configureDevice.devNo);
/* no op for now, just send a respond that we passed */
if (inmsg.hdr.Flags.responseExpected)
controlvm_respond(&inmsg.hdr, CONTROLVM_RESP_SUCCESS);
break;
case CONTROLVM_CHIPSET_READY:
LOGINF("CHIPSET_READY");
chipset_ready(&inmsg.hdr);
break;
case CONTROLVM_CHIPSET_SELFTEST:
LOGINF("CHIPSET_SELFTEST");
chipset_selftest(&inmsg.hdr);
break;
case CONTROLVM_CHIPSET_STOP:
LOGINF("CHIPSET_STOP");
chipset_notready(&inmsg.hdr);
break;
default:
LOGERR("unrecognized controlvm cmd=%d", (int) inmsg.hdr.Id);
if (inmsg.hdr.Flags.responseExpected)
controlvm_respond(&inmsg.hdr,
-CONTROLVM_RESP_ERROR_MESSAGE_ID_UNKNOWN);
break;
}
if (parser_ctx != NULL) {
parser_done(parser_ctx);
parser_ctx = NULL;
}
return TRUE;
}
static HOSTADDRESS controlvm_get_channel_address(void)
{
u64 addr = 0;
u32 size = 0;
if (!VMCALL_SUCCESSFUL(issue_vmcall_io_controlvm_addr(&addr, &size))) {
ERRDRV("%s - vmcall to determine controlvm channel addr failed",
__func__);
return 0;
}
INFODRV("controlvm addr=%Lx", addr);
return addr;
}
static void
controlvm_periodic_work(struct work_struct *work)
{
VISORCHIPSET_CHANNEL_INFO chanInfo;
CONTROLVM_MESSAGE inmsg;
BOOL gotACommand = FALSE;
BOOL handle_command_failed = FALSE;
static u64 Poll_Count;
/* make sure visorbus server is registered for controlvm callbacks */
if (visorchipset_serverregwait && !serverregistered)
goto Away;
/* make sure visorclientbus server is regsitered for controlvm
* callbacks
*/
if (visorchipset_clientregwait && !clientregistered)
goto Away;
memset(&chanInfo, 0, sizeof(VISORCHIPSET_CHANNEL_INFO));
Poll_Count++;
if (Poll_Count >= 250)
; /* keep going */
else
goto Away;
/* Check events to determine if response to CHIPSET_READY
* should be sent
*/
if (visorchipset_holdchipsetready
&& (g_ChipSetMsgHdr.Id != CONTROLVM_INVALID)) {
if (check_chipset_events() == 1) {
LOGINF("Sending CHIPSET_READY response");
controlvm_respond(&g_ChipSetMsgHdr, 0);
clear_chipset_events();
memset(&g_ChipSetMsgHdr, 0,
sizeof(CONTROLVM_MESSAGE_HEADER));
}
}
while (visorchannel_signalremove(ControlVm_channel,
CONTROLVM_QUEUE_RESPONSE,
&inmsg)) {
if (inmsg.hdr.PayloadMaxBytes != 0) {
LOGERR("Payload of size %lu returned @%lu with unexpected message id %d.",
(ulong) inmsg.hdr.PayloadMaxBytes,
(ulong) inmsg.hdr.PayloadVmOffset,
inmsg.hdr.Id);
}
}
if (!gotACommand) {
if (ControlVm_Pending_Msg_Valid) {
/* we throttled processing of a prior
* msg, so try to process it again
* rather than reading a new one
*/
inmsg = ControlVm_Pending_Msg;
ControlVm_Pending_Msg_Valid = FALSE;
gotACommand = TRUE;
} else
gotACommand = read_controlvm_event(&inmsg);
}
handle_command_failed = FALSE;
while (gotACommand && (!handle_command_failed)) {
Most_recent_message_jiffies = jiffies;
if (handle_command(inmsg,
visorchannel_get_physaddr
(ControlVm_channel)))
gotACommand = read_controlvm_event(&inmsg);
else {
/* this is a scenario where throttling
* is required, but probably NOT an
* error...; we stash the current
* controlvm msg so we will attempt to
* reprocess it on our next loop
*/
handle_command_failed = TRUE;
ControlVm_Pending_Msg = inmsg;
ControlVm_Pending_Msg_Valid = TRUE;
}
}
/* parahotplug_worker */
parahotplug_process_list();
Away:
if (time_after(jiffies,
Most_recent_message_jiffies + (HZ * MIN_IDLE_SECONDS))) {
/* it's been longer than MIN_IDLE_SECONDS since we
* processed our last controlvm message; slow down the
* polling
*/
if (Poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_SLOW) {
LOGINF("switched to slow controlvm polling");
Poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW;
}
} else {
if (Poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_FAST) {
Poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST;
LOGINF("switched to fast controlvm polling");
}
}
queue_delayed_work(Periodic_controlvm_workqueue,
&Periodic_controlvm_work, Poll_jiffies);
}
static void
setup_crash_devices_work_queue(struct work_struct *work)
{
CONTROLVM_MESSAGE localCrashCreateBusMsg;
CONTROLVM_MESSAGE localCrashCreateDevMsg;
CONTROLVM_MESSAGE msg;
u32 localSavedCrashMsgOffset;
u16 localSavedCrashMsgCount;
/* make sure visorbus server is registered for controlvm callbacks */
if (visorchipset_serverregwait && !serverregistered)
goto Away;
/* make sure visorclientbus server is regsitered for controlvm
* callbacks
*/
if (visorchipset_clientregwait && !clientregistered)
goto Away;
POSTCODE_LINUX_2(CRASH_DEV_ENTRY_PC, POSTCODE_SEVERITY_INFO);
/* send init chipset msg */
msg.hdr.Id = CONTROLVM_CHIPSET_INIT;
msg.cmd.initChipset.busCount = 23;
msg.cmd.initChipset.switchCount = 0;
chipset_init(&msg);
/* get saved message count */
if (visorchannel_read(ControlVm_channel,
offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
SavedCrashMsgCount),
&localSavedCrashMsgCount, sizeof(u16)) < 0) {
LOGERR("failed to get Saved Message Count");
POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC,
POSTCODE_SEVERITY_ERR);
return;
}
if (localSavedCrashMsgCount != CONTROLVM_CRASHMSG_MAX) {
LOGERR("Saved Message Count incorrect %d",
localSavedCrashMsgCount);
POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC,
localSavedCrashMsgCount,
POSTCODE_SEVERITY_ERR);
return;
}
/* get saved crash message offset */
if (visorchannel_read(ControlVm_channel,
offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
SavedCrashMsgOffset),
&localSavedCrashMsgOffset, sizeof(u32)) < 0) {
LOGERR("failed to get Saved Message Offset");
POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC,
POSTCODE_SEVERITY_ERR);
return;
}
/* read create device message for storage bus offset */
if (visorchannel_read(ControlVm_channel,
localSavedCrashMsgOffset,
&localCrashCreateBusMsg,
sizeof(CONTROLVM_MESSAGE)) < 0) {
LOGERR("CRASH_DEV_RD_BUS_FAIULRE: Failed to read CrashCreateBusMsg!");
POSTCODE_LINUX_2(CRASH_DEV_RD_BUS_FAIULRE_PC,
POSTCODE_SEVERITY_ERR);
return;
}
/* read create device message for storage device */
if (visorchannel_read(ControlVm_channel,
localSavedCrashMsgOffset +
sizeof(CONTROLVM_MESSAGE),
&localCrashCreateDevMsg,
sizeof(CONTROLVM_MESSAGE)) < 0) {
LOGERR("CRASH_DEV_RD_DEV_FAIULRE: Failed to read CrashCreateDevMsg!");
POSTCODE_LINUX_2(CRASH_DEV_RD_DEV_FAIULRE_PC,
POSTCODE_SEVERITY_ERR);
return;
}
/* reuse IOVM create bus message */
if (localCrashCreateBusMsg.cmd.createBus.channelAddr != 0)
bus_create(&localCrashCreateBusMsg);
else {
LOGERR("CrashCreateBusMsg is null, no dump will be taken");
POSTCODE_LINUX_2(CRASH_DEV_BUS_NULL_FAILURE_PC,
POSTCODE_SEVERITY_ERR);
return;
}
/* reuse create device message for storage device */
if (localCrashCreateDevMsg.cmd.createDevice.channelAddr != 0)
my_device_create(&localCrashCreateDevMsg);
else {
LOGERR("CrashCreateDevMsg is null, no dump will be taken");
POSTCODE_LINUX_2(CRASH_DEV_DEV_NULL_FAILURE_PC,
POSTCODE_SEVERITY_ERR);
return;
}
LOGINF("Bus and device ready for dumping");
POSTCODE_LINUX_2(CRASH_DEV_EXIT_PC, POSTCODE_SEVERITY_INFO);
return;
Away:
Poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW;
queue_delayed_work(Periodic_controlvm_workqueue,
&Periodic_controlvm_work, Poll_jiffies);
}
static void
bus_create_response(ulong busNo, int response)
{
bus_responder(CONTROLVM_BUS_CREATE, busNo, response);
}
static void
bus_destroy_response(ulong busNo, int response)
{
bus_responder(CONTROLVM_BUS_DESTROY, busNo, response);
}
static void
device_create_response(ulong busNo, ulong devNo, int response)
{
device_responder(CONTROLVM_DEVICE_CREATE, busNo, devNo, response);
}
static void
device_destroy_response(ulong busNo, ulong devNo, int response)
{
device_responder(CONTROLVM_DEVICE_DESTROY, busNo, devNo, response);
}
void
visorchipset_device_pause_response(ulong busNo, ulong devNo, int response)
{
device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE,
busNo, devNo, response,
SegmentStateStandby);
}
EXPORT_SYMBOL_GPL(visorchipset_device_pause_response);
static void
device_resume_response(ulong busNo, ulong devNo, int response)
{
device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE,
busNo, devNo, response,
SegmentStateRunning);
}
BOOL
visorchipset_get_bus_info(ulong busNo, VISORCHIPSET_BUS_INFO *busInfo)
{
void *p = findbus(&BusInfoList, busNo);
if (!p) {
LOGERR("(%lu) failed", busNo);
return FALSE;
}
memcpy(busInfo, p, sizeof(VISORCHIPSET_BUS_INFO));
return TRUE;
}
EXPORT_SYMBOL_GPL(visorchipset_get_bus_info);
BOOL
visorchipset_set_bus_context(ulong busNo, void *context)
{
VISORCHIPSET_BUS_INFO *p = findbus(&BusInfoList, busNo);
if (!p) {
LOGERR("(%lu) failed", busNo);
return FALSE;
}
p->bus_driver_context = context;
return TRUE;
}
EXPORT_SYMBOL_GPL(visorchipset_set_bus_context);
BOOL
visorchipset_get_device_info(ulong busNo, ulong devNo,
VISORCHIPSET_DEVICE_INFO *devInfo)
{
void *p = finddevice(&DevInfoList, busNo, devNo);
if (!p) {
LOGERR("(%lu,%lu) failed", busNo, devNo);
return FALSE;
}
memcpy(devInfo, p, sizeof(VISORCHIPSET_DEVICE_INFO));
return TRUE;
}
EXPORT_SYMBOL_GPL(visorchipset_get_device_info);
BOOL
visorchipset_set_device_context(ulong busNo, ulong devNo, void *context)
{
VISORCHIPSET_DEVICE_INFO *p = finddevice(&DevInfoList, busNo, devNo);
if (!p) {
LOGERR("(%lu,%lu) failed", busNo, devNo);
return FALSE;
}
p->bus_driver_context = context;
return TRUE;
}
EXPORT_SYMBOL_GPL(visorchipset_set_device_context);
/* Generic wrapper function for allocating memory from a kmem_cache pool.
*/
void *
visorchipset_cache_alloc(struct kmem_cache *pool, BOOL ok_to_block,
char *fn, int ln)
{
gfp_t gfp;
void *p;
if (ok_to_block)
gfp = GFP_KERNEL;
else
gfp = GFP_ATOMIC;
/* __GFP_NORETRY means "ok to fail", meaning
* kmem_cache_alloc() can return NULL, implying the caller CAN
* cope with failure. If you do NOT specify __GFP_NORETRY,
* Linux will go to extreme measures to get memory for you
* (like, invoke oom killer), which will probably cripple the
* system.
*/
gfp |= __GFP_NORETRY;
p = kmem_cache_alloc(pool, gfp);
if (!p) {
LOGERR("kmem_cache_alloc failed early @%s:%d\n", fn, ln);
return NULL;
}
atomic_inc(&Visorchipset_cache_buffers_in_use);
return p;
}
/* Generic wrapper function for freeing memory from a kmem_cache pool.
*/
void
visorchipset_cache_free(struct kmem_cache *pool, void *p, char *fn, int ln)
{
if (!p) {
LOGERR("NULL pointer @%s:%d\n", fn, ln);
return;
}
atomic_dec(&Visorchipset_cache_buffers_in_use);
kmem_cache_free(pool, p);
}
static ssize_t chipsetready_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
char msgtype[64];
if (sscanf(buf, "%63s", msgtype) != 1)
return -EINVAL;
if (strcmp(msgtype, "CALLHOMEDISK_MOUNTED") == 0) {
chipset_events[0] = 1;
return count;
} else if (strcmp(msgtype, "MODULES_LOADED") == 0) {
chipset_events[1] = 1;
return count;
}
return -EINVAL;
}
/* The parahotplug/devicedisabled interface gets called by our support script
* when an SR-IOV device has been shut down. The ID is passed to the script
* and then passed back when the device has been removed.
*/
static ssize_t devicedisabled_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
uint id;
if (kstrtouint(buf, 10, &id) != 0)
return -EINVAL;
parahotplug_request_complete(id, 0);
return count;
}
/* The parahotplug/deviceenabled interface gets called by our support script
* when an SR-IOV device has been recovered. The ID is passed to the script
* and then passed back when the device has been brought back up.
*/
static ssize_t deviceenabled_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
uint id;
if (kstrtouint(buf, 10, &id) != 0)
return -EINVAL;
parahotplug_request_complete(id, 1);
return count;
}
static int __init
visorchipset_init(void)
{
int rc = 0, x = 0;
char s[64];
HOSTADDRESS addr;
if (!unisys_spar_platform)
return -ENODEV;
LOGINF("chipset driver version %s loaded", VERSION);
/* process module options */
POSTCODE_LINUX_2(DRIVER_ENTRY_PC, POSTCODE_SEVERITY_INFO);
LOGINF("option - testvnic=%d", visorchipset_testvnic);
LOGINF("option - testvnicclient=%d", visorchipset_testvnicclient);
LOGINF("option - testmsg=%d", visorchipset_testmsg);
LOGINF("option - testteardown=%d", visorchipset_testteardown);
LOGINF("option - major=%d", visorchipset_major);
LOGINF("option - serverregwait=%d", visorchipset_serverregwait);
LOGINF("option - clientregwait=%d", visorchipset_clientregwait);
LOGINF("option - holdchipsetready=%d", visorchipset_holdchipsetready);
memset(&BusDev_Server_Notifiers, 0, sizeof(BusDev_Server_Notifiers));
memset(&BusDev_Client_Notifiers, 0, sizeof(BusDev_Client_Notifiers));
memset(&ControlVm_payload_info, 0, sizeof(ControlVm_payload_info));
memset(&LiveDump_info, 0, sizeof(LiveDump_info));
atomic_set(&LiveDump_info.buffers_in_use, 0);
if (visorchipset_testvnic) {
ERRDRV("testvnic option no longer supported: (status = %d)\n",
x);
POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, x, DIAG_SEVERITY_ERR);
rc = x;
goto Away;
}
addr = controlvm_get_channel_address();
if (addr != 0) {
ControlVm_channel =
visorchannel_create_with_lock
(addr,
sizeof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL),
UltraControlvmChannelProtocolGuid);
if (ULTRA_CONTROLVM_CHANNEL_OK_CLIENT
(visorchannel_get_header(ControlVm_channel),
NULL)) {
LOGINF("Channel %s (ControlVm) discovered",
visorchannel_id(ControlVm_channel, s));
initialize_controlvm_payload();
} else {
LOGERR("controlvm channel is invalid");
visorchannel_destroy(ControlVm_channel);
ControlVm_channel = NULL;
return -ENODEV;
}
} else {
LOGERR("no controlvm channel discovered");
return -ENODEV;
}
MajorDev = MKDEV(visorchipset_major, 0);
rc = visorchipset_file_init(MajorDev, &ControlVm_channel);
if (rc < 0) {
ERRDRV("visorchipset_file_init(MajorDev, &ControlVm_channel): error (status=%d)\n", rc);
POSTCODE_LINUX_2(CHIPSET_INIT_FAILURE_PC, DIAG_SEVERITY_ERR);
goto Away;
}
memset(&g_DiagMsgHdr, 0, sizeof(CONTROLVM_MESSAGE_HEADER));
memset(&g_ChipSetMsgHdr, 0, sizeof(CONTROLVM_MESSAGE_HEADER));
memset(&g_DelDumpMsgHdr, 0, sizeof(CONTROLVM_MESSAGE_HEADER));
Putfile_buffer_list_pool =
kmem_cache_create(Putfile_buffer_list_pool_name,
sizeof(struct putfile_buffer_entry),
0, SLAB_HWCACHE_ALIGN, NULL);
if (!Putfile_buffer_list_pool) {
ERRDRV("failed to alloc Putfile_buffer_list_pool: (status=-1)\n");
POSTCODE_LINUX_2(CHIPSET_INIT_FAILURE_PC, DIAG_SEVERITY_ERR);
rc = -1;
goto Away;
}
if (visorchipset_disable_controlvm) {
LOGINF("visorchipset_init:controlvm disabled");
} else {
/* if booting in a crash kernel */
if (visorchipset_crash_kernel)
INIT_DELAYED_WORK(&Periodic_controlvm_work,
setup_crash_devices_work_queue);
else
INIT_DELAYED_WORK(&Periodic_controlvm_work,
controlvm_periodic_work);
Periodic_controlvm_workqueue =
create_singlethread_workqueue("visorchipset_controlvm");
if (Periodic_controlvm_workqueue == NULL) {
ERRDRV("cannot create controlvm workqueue: (status=%d)\n",
-ENOMEM);
POSTCODE_LINUX_2(CREATE_WORKQUEUE_FAILED_PC,
DIAG_SEVERITY_ERR);
rc = -ENOMEM;
goto Away;
}
Most_recent_message_jiffies = jiffies;
Poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST;
rc = queue_delayed_work(Periodic_controlvm_workqueue,
&Periodic_controlvm_work, Poll_jiffies);
if (rc < 0) {
ERRDRV("queue_delayed_work(Periodic_controlvm_workqueue, &Periodic_controlvm_work, Poll_jiffies): error (status=%d)\n", rc);
POSTCODE_LINUX_2(QUEUE_DELAYED_WORK_PC,
DIAG_SEVERITY_ERR);
goto Away;
}
}
Visorchipset_platform_device.dev.devt = MajorDev;
if (platform_device_register(&Visorchipset_platform_device) < 0) {
ERRDRV("platform_device_register(visorchipset) failed: (status=-1)\n");
POSTCODE_LINUX_2(DEVICE_REGISTER_FAILURE_PC, DIAG_SEVERITY_ERR);
rc = -1;
goto Away;
}
LOGINF("visorchipset device created");
POSTCODE_LINUX_2(CHIPSET_INIT_SUCCESS_PC, POSTCODE_SEVERITY_INFO);
rc = 0;
Away:
if (rc) {
LOGERR("visorchipset_init failed");
POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, rc,
POSTCODE_SEVERITY_ERR);
}
return rc;
}
static void
visorchipset_exit(void)
{
char s[99];
POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO);
if (visorchipset_disable_controlvm) {
;
} else {
cancel_delayed_work(&Periodic_controlvm_work);
flush_workqueue(Periodic_controlvm_workqueue);
destroy_workqueue(Periodic_controlvm_workqueue);
Periodic_controlvm_workqueue = NULL;
destroy_controlvm_payload_info(&ControlVm_payload_info);
}
Test_Vnic_channel = NULL;
if (Putfile_buffer_list_pool) {
kmem_cache_destroy(Putfile_buffer_list_pool);
Putfile_buffer_list_pool = NULL;
}
cleanup_controlvm_structures();
memset(&g_DiagMsgHdr, 0, sizeof(CONTROLVM_MESSAGE_HEADER));
memset(&g_ChipSetMsgHdr, 0, sizeof(CONTROLVM_MESSAGE_HEADER));
memset(&g_DelDumpMsgHdr, 0, sizeof(CONTROLVM_MESSAGE_HEADER));
LOGINF("Channel %s (ControlVm) disconnected",
visorchannel_id(ControlVm_channel, s));
visorchannel_destroy(ControlVm_channel);
visorchipset_file_cleanup();
POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO);
LOGINF("chipset driver unloaded");
}
module_param_named(testvnic, visorchipset_testvnic, int, S_IRUGO);
MODULE_PARM_DESC(visorchipset_testvnic, "1 to test vnic, using dummy VNIC connected via a loopback to a physical ethernet");
int visorchipset_testvnic = 0;
module_param_named(testvnicclient, visorchipset_testvnicclient, int, S_IRUGO);
MODULE_PARM_DESC(visorchipset_testvnicclient, "1 to test vnic, using real VNIC channel attached to a separate IOVM guest");
int visorchipset_testvnicclient = 0;
module_param_named(testmsg, visorchipset_testmsg, int, S_IRUGO);
MODULE_PARM_DESC(visorchipset_testmsg,
"1 to manufacture the chipset, bus, and switch messages");
int visorchipset_testmsg = 0;
module_param_named(major, visorchipset_major, int, S_IRUGO);
MODULE_PARM_DESC(visorchipset_major, "major device number to use for the device node");
int visorchipset_major = 0;
module_param_named(serverregwait, visorchipset_serverregwait, int, S_IRUGO);
MODULE_PARM_DESC(visorchipset_serverreqwait,
"1 to have the module wait for the visor bus to register");
int visorchipset_serverregwait = 0; /* default is off */
module_param_named(clientregwait, visorchipset_clientregwait, int, S_IRUGO);
MODULE_PARM_DESC(visorchipset_clientregwait, "1 to have the module wait for the visorclientbus to register");
int visorchipset_clientregwait = 1; /* default is on */
module_param_named(testteardown, visorchipset_testteardown, int, S_IRUGO);
MODULE_PARM_DESC(visorchipset_testteardown,
"1 to test teardown of the chipset, bus, and switch");
int visorchipset_testteardown = 0; /* default is off */
module_param_named(disable_controlvm, visorchipset_disable_controlvm, int,
S_IRUGO);
MODULE_PARM_DESC(visorchipset_disable_controlvm,
"1 to disable polling of controlVm channel");
int visorchipset_disable_controlvm = 0; /* default is off */
module_param_named(crash_kernel, visorchipset_crash_kernel, int, S_IRUGO);
MODULE_PARM_DESC(visorchipset_crash_kernel,
"1 means we are running in crash kernel");
int visorchipset_crash_kernel = 0; /* default is running in non-crash kernel */
module_param_named(holdchipsetready, visorchipset_holdchipsetready,
int, S_IRUGO);
MODULE_PARM_DESC(visorchipset_holdchipsetready,
"1 to hold response to CHIPSET_READY");
int visorchipset_holdchipsetready = 0; /* default is to send CHIPSET_READY
* response immediately */
module_init(visorchipset_init);
module_exit(visorchipset_exit);
MODULE_AUTHOR("Unisys");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Supervisor chipset driver for service partition: ver "
VERSION);
MODULE_VERSION(VERSION);
|