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 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 | /******************************************************************* * This file is part of the Emulex Linux Device Driver for * * Fibre Channel Host Bus Adapters. * * Copyright (C) 2004-2008 Emulex. All rights reserved. * * EMULEX and SLI are trademarks of Emulex. * * www.emulex.com * * Portions Copyright (C) 2004-2005 Christoph Hellwig * * * * This program is free software; you can redistribute it and/or * * modify it under the terms of version 2 of the GNU General * * Public License as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful. * * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * * TO BE LEGALLY INVALID. See the GNU General Public License for * * more details, a copy of which can be found in the file COPYING * * included with this package. * *******************************************************************/ #include <linux/pci.h> #include <linux/interrupt.h> #include <linux/delay.h> #include <asm/unaligned.h> #include <scsi/scsi.h> #include <scsi/scsi_device.h> #include <scsi/scsi_eh.h> #include <scsi/scsi_host.h> #include <scsi/scsi_tcq.h> #include <scsi/scsi_transport_fc.h> #include "lpfc_version.h" #include "lpfc_hw.h" #include "lpfc_sli.h" #include "lpfc_nl.h" #include "lpfc_disc.h" #include "lpfc_scsi.h" #include "lpfc.h" #include "lpfc_logmsg.h" #include "lpfc_crtn.h" #include "lpfc_vport.h" #define LPFC_RESET_WAIT 2 #define LPFC_ABORT_WAIT 2 int _dump_buf_done; static char *dif_op_str[] = { "SCSI_PROT_NORMAL", "SCSI_PROT_READ_INSERT", "SCSI_PROT_WRITE_STRIP", "SCSI_PROT_READ_STRIP", "SCSI_PROT_WRITE_INSERT", "SCSI_PROT_READ_PASS", "SCSI_PROT_WRITE_PASS", "SCSI_PROT_READ_CONVERT", "SCSI_PROT_WRITE_CONVERT" }; static void lpfc_debug_save_data(struct scsi_cmnd *cmnd) { void *src, *dst; struct scatterlist *sgde = scsi_sglist(cmnd); if (!_dump_buf_data) { printk(KERN_ERR "BLKGRD ERROR %s _dump_buf_data is NULL\n", __func__); return; } if (!sgde) { printk(KERN_ERR "BLKGRD ERROR: data scatterlist is null\n"); return; } dst = (void *) _dump_buf_data; while (sgde) { src = sg_virt(sgde); memcpy(dst, src, sgde->length); dst += sgde->length; sgde = sg_next(sgde); } } static void lpfc_debug_save_dif(struct scsi_cmnd *cmnd) { void *src, *dst; struct scatterlist *sgde = scsi_prot_sglist(cmnd); if (!_dump_buf_dif) { printk(KERN_ERR "BLKGRD ERROR %s _dump_buf_data is NULL\n", __func__); return; } if (!sgde) { printk(KERN_ERR "BLKGRD ERROR: prot scatterlist is null\n"); return; } dst = _dump_buf_dif; while (sgde) { src = sg_virt(sgde); memcpy(dst, src, sgde->length); dst += sgde->length; sgde = sg_next(sgde); } } /** * lpfc_update_stats - Update statistical data for the command completion * @phba: Pointer to HBA object. * @lpfc_cmd: lpfc scsi command object pointer. * * This function is called when there is a command completion and this * function updates the statistical data for the command completion. **/ static void lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) { struct lpfc_rport_data *rdata = lpfc_cmd->rdata; struct lpfc_nodelist *pnode = rdata->pnode; struct scsi_cmnd *cmd = lpfc_cmd->pCmd; unsigned long flags; struct Scsi_Host *shost = cmd->device->host; struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; unsigned long latency; int i; if (cmd->result) return; latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time); spin_lock_irqsave(shost->host_lock, flags); if (!vport->stat_data_enabled || vport->stat_data_blocked || !pnode->lat_data || (phba->bucket_type == LPFC_NO_BUCKET)) { spin_unlock_irqrestore(shost->host_lock, flags); return; } if (phba->bucket_type == LPFC_LINEAR_BUCKET) { i = (latency + phba->bucket_step - 1 - phba->bucket_base)/ phba->bucket_step; /* check array subscript bounds */ if (i < 0) i = 0; else if (i >= LPFC_MAX_BUCKET_COUNT) i = LPFC_MAX_BUCKET_COUNT - 1; } else { for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++) if (latency <= (phba->bucket_base + ((1<<i)*phba->bucket_step))) break; } pnode->lat_data[i].cmd_count++; spin_unlock_irqrestore(shost->host_lock, flags); } /** * lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event * @phba: Pointer to HBA context object. * @vport: Pointer to vport object. * @ndlp: Pointer to FC node associated with the target. * @lun: Lun number of the scsi device. * @old_val: Old value of the queue depth. * @new_val: New value of the queue depth. * * This function sends an event to the mgmt application indicating * there is a change in the scsi device queue depth. **/ static void lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba, struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, uint32_t lun, uint32_t old_val, uint32_t new_val) { struct lpfc_fast_path_event *fast_path_evt; unsigned long flags; fast_path_evt = lpfc_alloc_fast_evt(phba); if (!fast_path_evt) return; fast_path_evt->un.queue_depth_evt.scsi_event.event_type = FC_REG_SCSI_EVENT; fast_path_evt->un.queue_depth_evt.scsi_event.subcategory = LPFC_EVENT_VARQUEDEPTH; /* Report all luns with change in queue depth */ fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun; if (ndlp && NLP_CHK_NODE_ACT(ndlp)) { memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn, &ndlp->nlp_portname, sizeof(struct lpfc_name)); memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn, &ndlp->nlp_nodename, sizeof(struct lpfc_name)); } fast_path_evt->un.queue_depth_evt.oldval = old_val; fast_path_evt->un.queue_depth_evt.newval = new_val; fast_path_evt->vport = vport; fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT; spin_lock_irqsave(&phba->hbalock, flags); list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); spin_unlock_irqrestore(&phba->hbalock, flags); lpfc_worker_wake_up(phba); return; } /** * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread * @phba: The Hba for which this call is being executed. * * This routine is called when there is resource error in driver or firmware. * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine * posts at most 1 event each second. This routine wakes up worker thread of * @phba to process WORKER_RAM_DOWN_EVENT event. * * This routine should be called with no lock held. **/ void lpfc_rampdown_queue_depth(struct lpfc_hba *phba) { unsigned long flags; uint32_t evt_posted; spin_lock_irqsave(&phba->hbalock, flags); atomic_inc(&phba->num_rsrc_err); phba->last_rsrc_error_time = jiffies; if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) { spin_unlock_irqrestore(&phba->hbalock, flags); return; } phba->last_ramp_down_time = jiffies; spin_unlock_irqrestore(&phba->hbalock, flags); spin_lock_irqsave(&phba->pport->work_port_lock, flags); evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE; if (!evt_posted) phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE; spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); if (!evt_posted) lpfc_worker_wake_up(phba); return; } /** * lpfc_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread * @phba: The Hba for which this call is being executed. * * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine * post at most 1 event every 5 minute after last_ramp_up_time or * last_rsrc_error_time. This routine wakes up worker thread of @phba * to process WORKER_RAM_DOWN_EVENT event. * * This routine should be called with no lock held. **/ static inline void lpfc_rampup_queue_depth(struct lpfc_vport *vport, uint32_t queue_depth) { unsigned long flags; struct lpfc_hba *phba = vport->phba; uint32_t evt_posted; atomic_inc(&phba->num_cmd_success); if (vport->cfg_lun_queue_depth <= queue_depth) return; spin_lock_irqsave(&phba->hbalock, flags); if (((phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) > jiffies) || ((phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL ) > jiffies)) { spin_unlock_irqrestore(&phba->hbalock, flags); return; } phba->last_ramp_up_time = jiffies; spin_unlock_irqrestore(&phba->hbalock, flags); spin_lock_irqsave(&phba->pport->work_port_lock, flags); evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE; if (!evt_posted) phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE; spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); if (!evt_posted) lpfc_worker_wake_up(phba); return; } /** * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler * @phba: The Hba for which this call is being executed. * * This routine is called to process WORKER_RAMP_DOWN_QUEUE event for worker * thread.This routine reduces queue depth for all scsi device on each vport * associated with @phba. **/ void lpfc_ramp_down_queue_handler(struct lpfc_hba *phba) { struct lpfc_vport **vports; struct Scsi_Host *shost; struct scsi_device *sdev; unsigned long new_queue_depth, old_queue_depth; unsigned long num_rsrc_err, num_cmd_success; int i; struct lpfc_rport_data *rdata; num_rsrc_err = atomic_read(&phba->num_rsrc_err); num_cmd_success = atomic_read(&phba->num_cmd_success); vports = lpfc_create_vport_work_array(phba); if (vports != NULL) for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) { shost = lpfc_shost_from_vport(vports[i]); shost_for_each_device(sdev, shost) { new_queue_depth = sdev->queue_depth * num_rsrc_err / (num_rsrc_err + num_cmd_success); if (!new_queue_depth) new_queue_depth = sdev->queue_depth - 1; else new_queue_depth = sdev->queue_depth - new_queue_depth; old_queue_depth = sdev->queue_depth; if (sdev->ordered_tags) scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, new_queue_depth); else scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, new_queue_depth); rdata = sdev->hostdata; if (rdata) lpfc_send_sdev_queuedepth_change_event( phba, vports[i], rdata->pnode, sdev->lun, old_queue_depth, new_queue_depth); } } lpfc_destroy_vport_work_array(phba, vports); atomic_set(&phba->num_rsrc_err, 0); atomic_set(&phba->num_cmd_success, 0); } /** * lpfc_ramp_up_queue_handler - WORKER_RAMP_UP_QUEUE event handler * @phba: The Hba for which this call is being executed. * * This routine is called to process WORKER_RAMP_UP_QUEUE event for worker * thread.This routine increases queue depth for all scsi device on each vport * associated with @phba by 1. This routine also sets @phba num_rsrc_err and * num_cmd_success to zero. **/ void lpfc_ramp_up_queue_handler(struct lpfc_hba *phba) { struct lpfc_vport **vports; struct Scsi_Host *shost; struct scsi_device *sdev; int i; struct lpfc_rport_data *rdata; vports = lpfc_create_vport_work_array(phba); if (vports != NULL) for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) { shost = lpfc_shost_from_vport(vports[i]); shost_for_each_device(sdev, shost) { if (vports[i]->cfg_lun_queue_depth <= sdev->queue_depth) continue; if (sdev->ordered_tags) scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, sdev->queue_depth+1); else scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, sdev->queue_depth+1); rdata = sdev->hostdata; if (rdata) lpfc_send_sdev_queuedepth_change_event( phba, vports[i], rdata->pnode, sdev->lun, sdev->queue_depth - 1, sdev->queue_depth); } } lpfc_destroy_vport_work_array(phba, vports); atomic_set(&phba->num_rsrc_err, 0); atomic_set(&phba->num_cmd_success, 0); } /** * lpfc_scsi_dev_block - set all scsi hosts to block state * @phba: Pointer to HBA context object. * * This function walks vport list and set each SCSI host to block state * by invoking fc_remote_port_delete() routine. This function is invoked * with EEH when device's PCI slot has been permanently disabled. **/ void lpfc_scsi_dev_block(struct lpfc_hba *phba) { struct lpfc_vport **vports; struct Scsi_Host *shost; struct scsi_device *sdev; struct fc_rport *rport; int i; vports = lpfc_create_vport_work_array(phba); if (vports != NULL) for (i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) { shost = lpfc_shost_from_vport(vports[i]); shost_for_each_device(sdev, shost) { rport = starget_to_rport(scsi_target(sdev)); fc_remote_port_delete(rport); } } lpfc_destroy_vport_work_array(phba, vports); } /** * lpfc_new_scsi_buf - Scsi buffer allocator * @vport: The virtual port for which this call being executed. * * This routine allocates a scsi buffer, which contains all the necessary * information needed to initiate a SCSI I/O. The non-DMAable buffer region * contains information to build the IOCB. The DMAable region contains * memory for the FCP CMND, FCP RSP, and the initial BPL. In addition to * allocating memory, the FCP CMND and FCP RSP BDEs are setup in the BPL * and the BPL BDE is setup in the IOCB. * * Return codes: * NULL - Error * Pointer to lpfc_scsi_buf data structure - Success **/ static struct lpfc_scsi_buf * lpfc_new_scsi_buf(struct lpfc_vport *vport) { struct lpfc_hba *phba = vport->phba; struct lpfc_scsi_buf *psb; struct ulp_bde64 *bpl; IOCB_t *iocb; dma_addr_t pdma_phys_fcp_cmd; dma_addr_t pdma_phys_fcp_rsp; dma_addr_t pdma_phys_bpl; uint16_t iotag; psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); if (!psb) return NULL; /* * Get memory from the pci pool to map the virt space to pci bus space * for an I/O. The DMA buffer includes space for the struct fcp_cmnd, * struct fcp_rsp and the number of bde's necessary to support the * sg_tablesize. */ psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL, &psb->dma_handle); if (!psb->data) { kfree(psb); return NULL; } /* Initialize virtual ptrs to dma_buf region. */ memset(psb->data, 0, phba->cfg_sg_dma_buf_size); /* Allocate iotag for psb->cur_iocbq. */ iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); if (iotag == 0) { pci_pool_free(phba->lpfc_scsi_dma_buf_pool, psb->data, psb->dma_handle); kfree (psb); return NULL; } psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; psb->fcp_cmnd = psb->data; psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd); psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp); /* Initialize local short-hand pointers. */ bpl = psb->fcp_bpl; pdma_phys_fcp_cmd = psb->dma_handle; pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd); pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp); /* * The first two bdes are the FCP_CMD and FCP_RSP. The balance are sg * list bdes. Initialize the first two and leave the rest for * queuecommand. */ bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd)); bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd)); bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd); bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64; bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w); /* Setup the physical region for the FCP RSP */ bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp)); bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp)); bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp); bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64; bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w); /* * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf, * initialize it with all known data now. */ iocb = &psb->cur_iocbq.iocb; iocb->un.fcpi64.bdl.ulpIoTag32 = 0; if ((phba->sli_rev == 3) && !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) { /* fill in immediate fcp command BDE */ iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED; iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t, unsli3.fcp_ext.icd); iocb->un.fcpi64.bdl.addrHigh = 0; iocb->ulpBdeCount = 0; iocb->ulpLe = 0; /* fill in responce BDE */ iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags = BUFF_TYPE_BDE_64; iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize = sizeof(struct fcp_rsp); iocb->unsli3.fcp_ext.rbde.addrLow = putPaddrLow(pdma_phys_fcp_rsp); iocb->unsli3.fcp_ext.rbde.addrHigh = putPaddrHigh(pdma_phys_fcp_rsp); } else { iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64; iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64)); iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_bpl); iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_bpl); iocb->ulpBdeCount = 1; iocb->ulpLe = 1; } iocb->ulpClass = CLASS3; return psb; } /** * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list list of Hba * @phba: The Hba for which this call is being executed. * * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list * and returns to caller. * * Return codes: * NULL - Error * Pointer to lpfc_scsi_buf - Success **/ static struct lpfc_scsi_buf* lpfc_get_scsi_buf(struct lpfc_hba * phba) { struct lpfc_scsi_buf * lpfc_cmd = NULL; struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list; unsigned long iflag = 0; spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list); if (lpfc_cmd) { lpfc_cmd->seg_cnt = 0; lpfc_cmd->nonsg_phys = 0; lpfc_cmd->prot_seg_cnt = 0; } spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); return lpfc_cmd; } /** * lpfc_release_scsi_buf - Return a scsi buffer back to hba's lpfc_scsi_buf_list * @phba: The Hba for which this call is being executed. * @psb: The scsi buffer which is being released. * * This routine releases @psb scsi buffer by adding it to tail of @phba * lpfc_scsi_buf_list list. **/ static void lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) { unsigned long iflag = 0; spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); psb->pCmd = NULL; list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list); spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); } /** * lpfc_scsi_prep_dma_buf - Routine to do DMA mapping for scsi buffer * @phba: The Hba for which this call is being executed. * @lpfc_cmd: The scsi buffer which is going to be mapped. * * This routine does the pci dma mapping for scatter-gather list of scsi cmnd * field of @lpfc_cmd. This routine scans through sg elements and format the * bdea. This routine also initializes all IOCB fields which are dependent on * scsi command request buffer. * * Return codes: * 1 - Error * 0 - Success **/ static int lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) { struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; struct scatterlist *sgel = NULL; struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde; dma_addr_t physaddr; uint32_t num_bde = 0; int nseg, datadir = scsi_cmnd->sc_data_direction; /* * There are three possibilities here - use scatter-gather segment, use * the single mapping, or neither. Start the lpfc command prep by * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first * data bde entry. */ bpl += 2; if (scsi_sg_count(scsi_cmnd)) { /* * The driver stores the segment count returned from pci_map_sg * because this a count of dma-mappings used to map the use_sg * pages. They are not guaranteed to be the same for those * architectures that implement an IOMMU. */ nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd), scsi_sg_count(scsi_cmnd), datadir); if (unlikely(!nseg)) return 1; lpfc_cmd->seg_cnt = nseg; if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { printk(KERN_ERR "%s: Too many sg segments from " "dma_map_sg. Config %d, seg_cnt %d\n", __func__, phba->cfg_sg_seg_cnt, lpfc_cmd->seg_cnt); scsi_dma_unmap(scsi_cmnd); return 1; } /* * The driver established a maximum scatter-gather segment count * during probe that limits the number of sg elements in any * single scsi command. Just run through the seg_cnt and format * the bde's. * When using SLI-3 the driver will try to fit all the BDEs into * the IOCB. If it can't then the BDEs get added to a BPL as it * does for SLI-2 mode. */ scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { physaddr = sg_dma_address(sgel); if (phba->sli_rev == 3 && !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && nseg <= LPFC_EXT_DATA_BDE_COUNT) { data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; data_bde->tus.f.bdeSize = sg_dma_len(sgel); data_bde->addrLow = putPaddrLow(physaddr); data_bde->addrHigh = putPaddrHigh(physaddr); data_bde++; } else { bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; bpl->tus.f.bdeSize = sg_dma_len(sgel); bpl->tus.w = le32_to_cpu(bpl->tus.w); bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); bpl++; } } } /* * Finish initializing those IOCB fields that are dependent on the * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is * explicitly reinitialized and for SLI-3 the extended bde count is * explicitly reinitialized since all iocb memory resources are reused. */ if (phba->sli_rev == 3 && !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) { if (num_bde > LPFC_EXT_DATA_BDE_COUNT) { /* * The extended IOCB format can only fit 3 BDE or a BPL. * This I/O has more than 3 BDE so the 1st data bde will * be a BPL that is filled in here. */ physaddr = lpfc_cmd->dma_handle; data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64; data_bde->tus.f.bdeSize = (num_bde * sizeof(struct ulp_bde64)); physaddr += (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp) + (2 * sizeof(struct ulp_bde64))); data_bde->addrHigh = putPaddrHigh(physaddr); data_bde->addrLow = putPaddrLow(physaddr); /* ebde count includes the responce bde and data bpl */ iocb_cmd->unsli3.fcp_ext.ebde_count = 2; } else { /* ebde count includes the responce bde and data bdes */ iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); } } else { iocb_cmd->un.fcpi64.bdl.bdeSize = ((num_bde + 2) * sizeof(struct ulp_bde64)); } fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); /* * Due to difference in data length between DIF/non-DIF paths, * we need to set word 4 of IOCB here */ iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); return 0; } /* * Given a scsi cmnd, determine the BlockGuard profile to be used * with the cmd */ static int lpfc_sc_to_sli_prof(struct scsi_cmnd *sc) { uint8_t guard_type = scsi_host_get_guard(sc->device->host); uint8_t ret_prof = LPFC_PROF_INVALID; if (guard_type == SHOST_DIX_GUARD_IP) { switch (scsi_get_prot_op(sc)) { case SCSI_PROT_READ_INSERT: case SCSI_PROT_WRITE_STRIP: ret_prof = LPFC_PROF_AST2; break; case SCSI_PROT_READ_STRIP: case SCSI_PROT_WRITE_INSERT: ret_prof = LPFC_PROF_A1; break; case SCSI_PROT_READ_CONVERT: case SCSI_PROT_WRITE_CONVERT: ret_prof = LPFC_PROF_AST1; break; case SCSI_PROT_READ_PASS: case SCSI_PROT_WRITE_PASS: case SCSI_PROT_NORMAL: default: printk(KERN_ERR "Bad op/guard:%d/%d combination\n", scsi_get_prot_op(sc), guard_type); break; } } else if (guard_type == SHOST_DIX_GUARD_CRC) { switch (scsi_get_prot_op(sc)) { case SCSI_PROT_READ_STRIP: case SCSI_PROT_WRITE_INSERT: ret_prof = LPFC_PROF_A1; break; case SCSI_PROT_READ_PASS: case SCSI_PROT_WRITE_PASS: ret_prof = LPFC_PROF_C1; break; case SCSI_PROT_READ_CONVERT: case SCSI_PROT_WRITE_CONVERT: case SCSI_PROT_READ_INSERT: case SCSI_PROT_WRITE_STRIP: case SCSI_PROT_NORMAL: default: printk(KERN_ERR "Bad op/guard:%d/%d combination\n", scsi_get_prot_op(sc), guard_type); break; } } else { /* unsupported format */ BUG(); } return ret_prof; } struct scsi_dif_tuple { __be16 guard_tag; /* Checksum */ __be16 app_tag; /* Opaque storage */ __be32 ref_tag; /* Target LBA or indirect LBA */ }; static inline unsigned lpfc_cmd_blksize(struct scsi_cmnd *sc) { return sc->device->sector_size; } /** * lpfc_get_cmd_dif_parms - Extract DIF parameters from SCSI command * @sc: in: SCSI command * @apptagmask: out: app tag mask * @apptagval: out: app tag value * @reftag: out: ref tag (reference tag) * * Description: * Extract DIF paramters from the command if possible. Otherwise, * use default paratmers. * **/ static inline void lpfc_get_cmd_dif_parms(struct scsi_cmnd *sc, uint16_t *apptagmask, uint16_t *apptagval, uint32_t *reftag) { struct scsi_dif_tuple *spt; unsigned char op = scsi_get_prot_op(sc); unsigned int protcnt = scsi_prot_sg_count(sc); static int cnt; if (protcnt && (op == SCSI_PROT_WRITE_STRIP || op == SCSI_PROT_WRITE_PASS || op == SCSI_PROT_WRITE_CONVERT)) { cnt++; spt = page_address(sg_page(scsi_prot_sglist(sc))) + scsi_prot_sglist(sc)[0].offset; *apptagmask = 0; *apptagval = 0; *reftag = cpu_to_be32(spt->ref_tag); } else { /* SBC defines ref tag to be lower 32bits of LBA */ *reftag = (uint32_t) (0xffffffff & scsi_get_lba(sc)); *apptagmask = 0; *apptagval = 0; } } /* * This function sets up buffer list for protection groups of * type LPFC_PG_TYPE_NO_DIF * * This is usually used when the HBA is instructed to generate * DIFs and insert them into data stream (or strip DIF from * incoming data stream) * * The buffer list consists of just one protection group described * below: * +-------------------------+ * start of prot group --> | PDE_1 | * +-------------------------+ * | Data BDE | * +-------------------------+ * |more Data BDE's ... (opt)| * +-------------------------+ * * @sc: pointer to scsi command we're working on * @bpl: pointer to buffer list for protection groups * @datacnt: number of segments of data that have been dma mapped * * Note: Data s/g buffers have been dma mapped */ static int lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc, struct ulp_bde64 *bpl, int datasegcnt) { struct scatterlist *sgde = NULL; /* s/g data entry */ struct lpfc_pde *pde1 = NULL; dma_addr_t physaddr; int i = 0, num_bde = 0; int datadir = sc->sc_data_direction; int prof = LPFC_PROF_INVALID; unsigned blksize; uint32_t reftag; uint16_t apptagmask, apptagval; pde1 = (struct lpfc_pde *) bpl; prof = lpfc_sc_to_sli_prof(sc); if (prof == LPFC_PROF_INVALID) goto out; /* extract some info from the scsi command for PDE1*/ blksize = lpfc_cmd_blksize(sc); lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag); /* setup PDE1 with what we have */ lpfc_pde_set_bg_parms(pde1, LPFC_PDE1_DESCRIPTOR, prof, blksize, BG_EC_STOP_ERR); lpfc_pde_set_dif_parms(pde1, apptagmask, apptagval, reftag); num_bde++; bpl++; /* assumption: caller has already run dma_map_sg on command data */ scsi_for_each_sg(sc, sgde, datasegcnt, i) { physaddr = sg_dma_address(sgde); bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); bpl->tus.f.bdeSize = sg_dma_len(sgde); if (datadir == DMA_TO_DEVICE) bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; else bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; bpl->tus.w = le32_to_cpu(bpl->tus.w); bpl++; num_bde++; } out: return num_bde; } /* * This function sets up buffer list for protection groups of * type LPFC_PG_TYPE_DIF_BUF * * This is usually used when DIFs are in their own buffers, * separate from the data. The HBA can then by instructed * to place the DIFs in the outgoing stream. For read operations, * The HBA could extract the DIFs and place it in DIF buffers. * * The buffer list for this type consists of one or more of the * protection groups described below: * +-------------------------+ * start of first prot group --> | PDE_1 | * +-------------------------+ * | PDE_3 (Prot BDE) | * +-------------------------+ * | Data BDE | * +-------------------------+ * |more Data BDE's ... (opt)| * +-------------------------+ * start of new prot group --> | PDE_1 | * +-------------------------+ * | ... | * +-------------------------+ * * @sc: pointer to scsi command we're working on * @bpl: pointer to buffer list for protection groups * @datacnt: number of segments of data that have been dma mapped * @protcnt: number of segment of protection data that have been dma mapped * * Note: It is assumed that both data and protection s/g buffers have been * mapped for DMA */ static int lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, struct ulp_bde64 *bpl, int datacnt, int protcnt) { struct scatterlist *sgde = NULL; /* s/g data entry */ struct scatterlist *sgpe = NULL; /* s/g prot entry */ struct lpfc_pde *pde1 = NULL; struct ulp_bde64 *prot_bde = NULL; dma_addr_t dataphysaddr, protphysaddr; unsigned short curr_data = 0, curr_prot = 0; unsigned int split_offset, protgroup_len; unsigned int protgrp_blks, protgrp_bytes; unsigned int remainder, subtotal; int prof = LPFC_PROF_INVALID; int datadir = sc->sc_data_direction; unsigned char pgdone = 0, alldone = 0; unsigned blksize; uint32_t reftag; uint16_t apptagmask, apptagval; int num_bde = 0; sgpe = scsi_prot_sglist(sc); sgde = scsi_sglist(sc); if (!sgpe || !sgde) { lpfc_printf_log(phba, KERN_ERR, LOG_FCP, "9020 Invalid s/g entry: data=0x%p prot=0x%p\n", sgpe, sgde); return 0; } prof = lpfc_sc_to_sli_prof(sc); if (prof == LPFC_PROF_INVALID) goto out; /* extract some info from the scsi command for PDE1*/ blksize = lpfc_cmd_blksize(sc); lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag); split_offset = 0; do { /* setup the first PDE_1 */ pde1 = (struct lpfc_pde *) bpl; lpfc_pde_set_bg_parms(pde1, LPFC_PDE1_DESCRIPTOR, prof, blksize, BG_EC_STOP_ERR); lpfc_pde_set_dif_parms(pde1, apptagmask, apptagval, reftag); num_bde++; bpl++; /* setup the first BDE that points to protection buffer */ prot_bde = (struct ulp_bde64 *) bpl; protphysaddr = sg_dma_address(sgpe); prot_bde->addrLow = le32_to_cpu(putPaddrLow(protphysaddr)); prot_bde->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr)); protgroup_len = sg_dma_len(sgpe); /* must be integer multiple of the DIF block length */ BUG_ON(protgroup_len % 8); protgrp_blks = protgroup_len / 8; protgrp_bytes = protgrp_blks * blksize; prot_bde->tus.f.bdeSize = protgroup_len; if (datadir == DMA_TO_DEVICE) prot_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; else prot_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; prot_bde->tus.w = le32_to_cpu(bpl->tus.w); curr_prot++; num_bde++; /* setup BDE's for data blocks associated with DIF data */ pgdone = 0; subtotal = 0; /* total bytes processed for current prot grp */ while (!pgdone) { if (!sgde) { printk(KERN_ERR "%s Invalid data segment\n", __func__); return 0; } bpl++; dataphysaddr = sg_dma_address(sgde) + split_offset; bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr)); bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr)); remainder = sg_dma_len(sgde) - split_offset; if ((subtotal + remainder) <= protgrp_bytes) { /* we can use this whole buffer */ bpl->tus.f.bdeSize = remainder; split_offset = 0; if ((subtotal + remainder) == protgrp_bytes) pgdone = 1; } else { /* must split this buffer with next prot grp */ bpl->tus.f.bdeSize = protgrp_bytes - subtotal; split_offset += bpl->tus.f.bdeSize; } subtotal += bpl->tus.f.bdeSize; if (datadir == DMA_TO_DEVICE) bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; else bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; bpl->tus.w = le32_to_cpu(bpl->tus.w); num_bde++; curr_data++; if (split_offset) break; /* Move to the next s/g segment if possible */ sgde = sg_next(sgde); } /* are we done ? */ if (curr_prot == protcnt) { alldone = 1; } else if (curr_prot < protcnt) { /* advance to next prot buffer */ sgpe = sg_next(sgpe); bpl++; /* update the reference tag */ reftag += protgrp_blks; } else { /* if we're here, we have a bug */ printk(KERN_ERR "BLKGRD: bug in %s\n", __func__); } } while (!alldone); out: return num_bde; } /* * Given a SCSI command that supports DIF, determine composition of protection * groups involved in setting up buffer lists * * Returns: * for DIF (for both read and write) * */ static int lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc) { int ret = LPFC_PG_TYPE_INVALID; unsigned char op = scsi_get_prot_op(sc); switch (op) { case SCSI_PROT_READ_STRIP: case SCSI_PROT_WRITE_INSERT: ret = LPFC_PG_TYPE_NO_DIF; break; case SCSI_PROT_READ_INSERT: case SCSI_PROT_WRITE_STRIP: case SCSI_PROT_READ_PASS: case SCSI_PROT_WRITE_PASS: case SCSI_PROT_WRITE_CONVERT: case SCSI_PROT_READ_CONVERT: ret = LPFC_PG_TYPE_DIF_BUF; break; default: lpfc_printf_log(phba, KERN_ERR, LOG_FCP, "9021 Unsupported protection op:%d\n", op); break; } return ret; } /* * This is the protection/DIF aware version of * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the * two functions eventually, but for now, it's here */ static int lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) { struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; uint32_t num_bde = 0; int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; int prot_group_type = 0; int diflen, fcpdl; unsigned blksize; /* * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd * fcp_rsp regions to the first data bde entry */ bpl += 2; if (scsi_sg_count(scsi_cmnd)) { /* * The driver stores the segment count returned from pci_map_sg * because this a count of dma-mappings used to map the use_sg * pages. They are not guaranteed to be the same for those * architectures that implement an IOMMU. */ datasegcnt = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd), scsi_sg_count(scsi_cmnd), datadir); if (unlikely(!datasegcnt)) return 1; lpfc_cmd->seg_cnt = datasegcnt; if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { printk(KERN_ERR "%s: Too many sg segments from " "dma_map_sg. Config %d, seg_cnt %d\n", __func__, phba->cfg_sg_seg_cnt, lpfc_cmd->seg_cnt); scsi_dma_unmap(scsi_cmnd); return 1; } prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); switch (prot_group_type) { case LPFC_PG_TYPE_NO_DIF: num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl, datasegcnt); /* we shoud have 2 or more entries in buffer list */ if (num_bde < 2) goto err; break; case LPFC_PG_TYPE_DIF_BUF:{ /* * This type indicates that protection buffers are * passed to the driver, so that needs to be prepared * for DMA */ protsegcnt = dma_map_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd), scsi_prot_sg_count(scsi_cmnd), datadir); if (unlikely(!protsegcnt)) { scsi_dma_unmap(scsi_cmnd); return 1; } lpfc_cmd->prot_seg_cnt = protsegcnt; if (lpfc_cmd->prot_seg_cnt > phba->cfg_prot_sg_seg_cnt) { printk(KERN_ERR "%s: Too many prot sg segments " "from dma_map_sg. Config %d," "prot_seg_cnt %d\n", __func__, phba->cfg_prot_sg_seg_cnt, lpfc_cmd->prot_seg_cnt); dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd), scsi_prot_sg_count(scsi_cmnd), datadir); scsi_dma_unmap(scsi_cmnd); return 1; } num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl, datasegcnt, protsegcnt); /* we shoud have 3 or more entries in buffer list */ if (num_bde < 3) goto err; break; } case LPFC_PG_TYPE_INVALID: default: lpfc_printf_log(phba, KERN_ERR, LOG_FCP, "9022 Unexpected protection group %i\n", prot_group_type); return 1; } } /* * Finish initializing those IOCB fields that are dependent on the * scsi_cmnd request_buffer. Note that the bdeSize is explicitly * reinitialized since all iocb memory resources are used many times * for transmit, receive, and continuation bpl's. */ iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64)); iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64)); iocb_cmd->ulpBdeCount = 1; iocb_cmd->ulpLe = 1; fcpdl = scsi_bufflen(scsi_cmnd); if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) { /* * We are in DIF Type 1 mode * Every data block has a 8 byte DIF (trailer) * attached to it. Must ajust FCP data length */ blksize = lpfc_cmd_blksize(scsi_cmnd); diflen = (fcpdl / blksize) * 8; fcpdl += diflen; } fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); /* * Due to difference in data length between DIF/non-DIF paths, * we need to set word 4 of IOCB here */ iocb_cmd->un.fcpi.fcpi_parm = fcpdl; return 0; err: lpfc_printf_log(phba, KERN_ERR, LOG_FCP, "9023 Could not setup all needed BDE's" "prot_group_type=%d, num_bde=%d\n", prot_group_type, num_bde); return 1; } /* * This function checks for BlockGuard errors detected by * the HBA. In case of errors, the ASC/ASCQ fields in the * sense buffer will be set accordingly, paired with * ILLEGAL_REQUEST to signal to the kernel that the HBA * detected corruption. * * Returns: * 0 - No error found * 1 - BlockGuard error found * -1 - Internal error (bad profile, ...etc) */ static int lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *pIocbOut) { struct scsi_cmnd *cmd = lpfc_cmd->pCmd; struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg; int ret = 0; uint32_t bghm = bgf->bghm; uint32_t bgstat = bgf->bgstat; uint64_t failing_sector = 0; printk(KERN_ERR "BG ERROR in cmd 0x%x lba 0x%llx blk cnt 0x%lx " "bgstat=0x%x bghm=0x%x\n", cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd), cmd->request->nr_sectors, bgstat, bghm); spin_lock(&_dump_buf_lock); if (!_dump_buf_done) { printk(KERN_ERR "Saving Data for %u blocks to debugfs\n", (cmd->cmnd[7] << 8 | cmd->cmnd[8])); lpfc_debug_save_data(cmd); /* If we have a prot sgl, save the DIF buffer */ if (lpfc_prot_group_type(phba, cmd) == LPFC_PG_TYPE_DIF_BUF) { printk(KERN_ERR "Saving DIF for %u blocks to debugfs\n", (cmd->cmnd[7] << 8 | cmd->cmnd[8])); lpfc_debug_save_dif(cmd); } _dump_buf_done = 1; } spin_unlock(&_dump_buf_lock); if (lpfc_bgs_get_invalid_prof(bgstat)) { cmd->result = ScsiResult(DID_ERROR, 0); printk(KERN_ERR "Invalid BlockGuard profile. bgstat:0x%x\n", bgstat); ret = (-1); goto out; } if (lpfc_bgs_get_uninit_dif_block(bgstat)) { cmd->result = ScsiResult(DID_ERROR, 0); printk(KERN_ERR "Invalid BlockGuard DIF Block. bgstat:0x%x\n", bgstat); ret = (-1); goto out; } if (lpfc_bgs_get_guard_err(bgstat)) { ret = 1; scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 0x10, 0x1); cmd->result = DRIVER_SENSE << 24 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); phba->bg_guard_err_cnt++; printk(KERN_ERR "BLKGRD: guard_tag error\n"); } if (lpfc_bgs_get_reftag_err(bgstat)) { ret = 1; scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 0x10, 0x3); cmd->result = DRIVER_SENSE << 24 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); phba->bg_reftag_err_cnt++; printk(KERN_ERR "BLKGRD: ref_tag error\n"); } if (lpfc_bgs_get_apptag_err(bgstat)) { ret = 1; scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 0x10, 0x2); cmd->result = DRIVER_SENSE << 24 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); phba->bg_apptag_err_cnt++; printk(KERN_ERR "BLKGRD: app_tag error\n"); } if (lpfc_bgs_get_hi_water_mark_present(bgstat)) { /* * setup sense data descriptor 0 per SPC-4 as an information * field, and put the failing LBA in it */ cmd->sense_buffer[8] = 0; /* Information */ cmd->sense_buffer[9] = 0xa; /* Add. length */ bghm /= cmd->device->sector_size; failing_sector = scsi_get_lba(cmd); failing_sector += bghm; put_unaligned_be64(failing_sector, &cmd->sense_buffer[10]); } if (!ret) { /* No error was reported - problem in FW? */ cmd->result = ScsiResult(DID_ERROR, 0); printk(KERN_ERR "BLKGRD: no errors reported!\n"); } out: return ret; } /** * lpfc_send_scsi_error_event - Posts an event when there is SCSI error * @phba: Pointer to hba context object. * @vport: Pointer to vport object. * @lpfc_cmd: Pointer to lpfc scsi command which reported the error. * @rsp_iocb: Pointer to response iocb object which reported error. * * This function posts an event when there is a SCSI command reporting * error from the scsi device. **/ static void lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) { struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; uint32_t resp_info = fcprsp->rspStatus2; uint32_t scsi_status = fcprsp->rspStatus3; uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; struct lpfc_fast_path_event *fast_path_evt = NULL; struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode; unsigned long flags; /* If there is queuefull or busy condition send a scsi event */ if ((cmnd->result == SAM_STAT_TASK_SET_FULL) || (cmnd->result == SAM_STAT_BUSY)) { fast_path_evt = lpfc_alloc_fast_evt(phba); if (!fast_path_evt) return; fast_path_evt->un.scsi_evt.event_type = FC_REG_SCSI_EVENT; fast_path_evt->un.scsi_evt.subcategory = (cmnd->result == SAM_STAT_TASK_SET_FULL) ? LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY; fast_path_evt->un.scsi_evt.lun = cmnd->device->lun; memcpy(&fast_path_evt->un.scsi_evt.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); memcpy(&fast_path_evt->un.scsi_evt.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen && ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) { fast_path_evt = lpfc_alloc_fast_evt(phba); if (!fast_path_evt) return; fast_path_evt->un.check_cond_evt.scsi_event.event_type = FC_REG_SCSI_EVENT; fast_path_evt->un.check_cond_evt.scsi_event.subcategory = LPFC_EVENT_CHECK_COND; fast_path_evt->un.check_cond_evt.scsi_event.lun = cmnd->device->lun; memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); fast_path_evt->un.check_cond_evt.sense_key = cmnd->sense_buffer[2] & 0xf; fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12]; fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13]; } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && fcpi_parm && ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) || ((scsi_status == SAM_STAT_GOOD) && !(resp_info & (RESID_UNDER | RESID_OVER))))) { /* * If status is good or resid does not match with fcp_param and * there is valid fcpi_parm, then there is a read_check error */ fast_path_evt = lpfc_alloc_fast_evt(phba); if (!fast_path_evt) return; fast_path_evt->un.read_check_error.header.event_type = FC_REG_FABRIC_EVENT; fast_path_evt->un.read_check_error.header.subcategory = LPFC_EVENT_FCPRDCHKERR; memcpy(&fast_path_evt->un.read_check_error.header.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); memcpy(&fast_path_evt->un.read_check_error.header.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); fast_path_evt->un.read_check_error.lun = cmnd->device->lun; fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0]; fast_path_evt->un.read_check_error.fcpiparam = fcpi_parm; } else return; fast_path_evt->vport = vport; spin_lock_irqsave(&phba->hbalock, flags); list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); spin_unlock_irqrestore(&phba->hbalock, flags); lpfc_worker_wake_up(phba); return; } /** * lpfc_scsi_unprep_dma_buf - Routine to un-map DMA mapping of scatter gather * @phba: The Hba for which this call is being executed. * @psb: The scsi buffer which is going to be un-mapped. * * This routine does DMA un-mapping of scatter gather list of scsi command * field of @lpfc_cmd. **/ static void lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb) { /* * There are only two special cases to consider. (1) the scsi command * requested scatter-gather usage or (2) the scsi command allocated * a request buffer, but did not request use_sg. There is a third * case, but it does not require resource deallocation. */ if (psb->seg_cnt > 0) scsi_dma_unmap(psb->pCmd); if (psb->prot_seg_cnt > 0) dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd), scsi_prot_sg_count(psb->pCmd), psb->pCmd->sc_data_direction); } /** * lpfc_handler_fcp_err - FCP response handler * @vport: The virtual port for which this call is being executed. * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. * @rsp_iocb: The response IOCB which contains FCP error. * * This routine is called to process response IOCB with status field * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command * based upon SCSI and FCP error. **/ static void lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) { struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd; struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; uint32_t resp_info = fcprsp->rspStatus2; uint32_t scsi_status = fcprsp->rspStatus3; uint32_t *lp; uint32_t host_status = DID_OK; uint32_t rsplen = 0; uint32_t logit = LOG_FCP | LOG_FCP_ERROR; /* * If this is a task management command, there is no * scsi packet associated with this lpfc_cmd. The driver * consumes it. */ if (fcpcmd->fcpCntl2) { scsi_status = 0; goto out; } if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) { uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen); if (snslen > SCSI_SENSE_BUFFERSIZE) snslen = SCSI_SENSE_BUFFERSIZE; if (resp_info & RSP_LEN_VALID) rsplen = be32_to_cpu(fcprsp->rspRspLen); memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen); } lp = (uint32_t *)cmnd->sense_buffer; if (!scsi_status && (resp_info & RESID_UNDER)) logit = LOG_FCP; lpfc_printf_vlog(vport, KERN_WARNING, logit, "9024 FCP command x%x failed: x%x SNS x%x x%x " "Data: x%x x%x x%x x%x x%x\n", cmnd->cmnd[0], scsi_status, be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info, be32_to_cpu(fcprsp->rspResId), be32_to_cpu(fcprsp->rspSnsLen), be32_to_cpu(fcprsp->rspRspLen), fcprsp->rspInfo3); if (resp_info & RSP_LEN_VALID) { rsplen = be32_to_cpu(fcprsp->rspRspLen); if ((rsplen != 0 && rsplen != 4 && rsplen != 8) || (fcprsp->rspInfo3 != RSP_NO_FAILURE)) { host_status = DID_ERROR; goto out; } } scsi_set_resid(cmnd, 0); if (resp_info & RESID_UNDER) { scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId)); lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, "9025 FCP Read Underrun, expected %d, " "residual %d Data: x%x x%x x%x\n", be32_to_cpu(fcpcmd->fcpDl), scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0], cmnd->underflow); /* * If there is an under run check if under run reported by * storage array is same as the under run reported by HBA. * If this is not same, there is a dropped frame. */ if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && fcpi_parm && (scsi_get_resid(cmnd) != fcpi_parm)) { lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR, "9026 FCP Read Check Error " "and Underrun Data: x%x x%x x%x x%x\n", be32_to_cpu(fcpcmd->fcpDl), scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0]); scsi_set_resid(cmnd, scsi_bufflen(cmnd)); host_status = DID_ERROR; } /* * The cmnd->underflow is the minimum number of bytes that must * be transfered for this command. Provided a sense condition * is not present, make sure the actual amount transferred is at * least the underflow value or fail. */ if (!(resp_info & SNS_LEN_VALID) && (scsi_status == SAM_STAT_GOOD) && (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) { lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, "9027 FCP command x%x residual " "underrun converted to error " "Data: x%x x%x x%x\n", cmnd->cmnd[0], scsi_bufflen(cmnd), scsi_get_resid(cmnd), cmnd->underflow); host_status = DID_ERROR; } } else if (resp_info & RESID_OVER) { lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, "9028 FCP command x%x residual overrun error. " "Data: x%x x%x \n", cmnd->cmnd[0], scsi_bufflen(cmnd), scsi_get_resid(cmnd)); host_status = DID_ERROR; /* * Check SLI validation that all the transfer was actually done * (fcpi_parm should be zero). Apply check only to reads. */ } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) { lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR, "9029 FCP Read Check Error Data: " "x%x x%x x%x x%x\n", be32_to_cpu(fcpcmd->fcpDl), be32_to_cpu(fcprsp->rspResId), fcpi_parm, cmnd->cmnd[0]); host_status = DID_ERROR; scsi_set_resid(cmnd, scsi_bufflen(cmnd)); } out: cmnd->result = ScsiResult(host_status, scsi_status); lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb); } /** * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine * @phba: The Hba for which this call is being executed. * @pIocbIn: The command IOCBQ for the scsi cmnd. * @pIocbOut: The response IOCBQ for the scsi cmnd . * * This routine assigns scsi command result by looking into response IOCB * status field appropriately. This routine handles QUEUE FULL condition as * well by ramping down device queue depth. **/ static void lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, struct lpfc_iocbq *pIocbOut) { struct lpfc_scsi_buf *lpfc_cmd = (struct lpfc_scsi_buf *) pIocbIn->context1; struct lpfc_vport *vport = pIocbIn->vport; struct lpfc_rport_data *rdata = lpfc_cmd->rdata; struct lpfc_nodelist *pnode = rdata->pnode; struct scsi_cmnd *cmd = lpfc_cmd->pCmd; int result; struct scsi_device *tmp_sdev; int depth = 0; unsigned long flags; struct lpfc_fast_path_event *fast_path_evt; struct Scsi_Host *shost = cmd->device->host; uint32_t queue_depth, scsi_id; lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4]; lpfc_cmd->status = pIocbOut->iocb.ulpStatus; if (pnode && NLP_CHK_NODE_ACT(pnode)) atomic_dec(&pnode->cmd_pending); if (lpfc_cmd->status) { if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && (lpfc_cmd->result & IOERR_DRVR_MASK)) lpfc_cmd->status = IOSTAT_DRIVER_REJECT; else if (lpfc_cmd->status >= IOSTAT_CNT) lpfc_cmd->status = IOSTAT_DEFAULT; lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, "9030 FCP cmd x%x failed <%d/%d> " "status: x%x result: x%x Data: x%x x%x\n", cmd->cmnd[0], cmd->device ? cmd->device->id : 0xffff, cmd->device ? cmd->device->lun : 0xffff, lpfc_cmd->status, lpfc_cmd->result, pIocbOut->iocb.ulpContext, lpfc_cmd->cur_iocbq.iocb.ulpIoTag); switch (lpfc_cmd->status) { case IOSTAT_FCP_RSP_ERROR: /* Call FCP RSP handler to determine result */ lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut); break; case IOSTAT_NPORT_BSY: case IOSTAT_FABRIC_BSY: cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0); fast_path_evt = lpfc_alloc_fast_evt(phba); if (!fast_path_evt) break; fast_path_evt->un.fabric_evt.event_type = FC_REG_FABRIC_EVENT; fast_path_evt->un.fabric_evt.subcategory = (lpfc_cmd->status == IOSTAT_NPORT_BSY) ? LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY; if (pnode && NLP_CHK_NODE_ACT(pnode)) { memcpy(&fast_path_evt->un.fabric_evt.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); memcpy(&fast_path_evt->un.fabric_evt.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); } fast_path_evt->vport = vport; fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT; spin_lock_irqsave(&phba->hbalock, flags); list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); spin_unlock_irqrestore(&phba->hbalock, flags); lpfc_worker_wake_up(phba); break; case IOSTAT_LOCAL_REJECT: if (lpfc_cmd->result == IOERR_INVALID_RPI || lpfc_cmd->result == IOERR_NO_RESOURCES || lpfc_cmd->result == IOERR_ABORT_REQUESTED) { cmd->result = ScsiResult(DID_REQUEUE, 0); break; } if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED || lpfc_cmd->result == IOERR_TX_DMA_FAILED) && pIocbOut->iocb.unsli3.sli3_bg.bgstat) { if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) { /* * This is a response for a BG enabled * cmd. Parse BG error */ lpfc_parse_bg_err(phba, lpfc_cmd, pIocbOut); break; } else { lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, "9031 non-zero BGSTAT " "on unprotected cmd"); } } /* else: fall through */ default: cmd->result = ScsiResult(DID_ERROR, 0); break; } if (!pnode || !NLP_CHK_NODE_ACT(pnode) || (pnode->nlp_state != NLP_STE_MAPPED_NODE)) cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, SAM_STAT_BUSY); } else { cmd->result = ScsiResult(DID_OK, 0); } if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) { uint32_t *lp = (uint32_t *)cmd->sense_buffer; lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, "0710 Iodone <%d/%d> cmd %p, error " "x%x SNS x%x x%x Data: x%x x%x\n", cmd->device->id, cmd->device->lun, cmd, cmd->result, *lp, *(lp + 3), cmd->retries, scsi_get_resid(cmd)); } lpfc_update_stats(phba, lpfc_cmd); result = cmd->result; if (vport->cfg_max_scsicmpl_time && time_after(jiffies, lpfc_cmd->start_time + msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) { spin_lock_irqsave(shost->host_lock, flags); if (pnode && NLP_CHK_NODE_ACT(pnode)) { if (pnode->cmd_qdepth > atomic_read(&pnode->cmd_pending) && (atomic_read(&pnode->cmd_pending) > LPFC_MIN_TGT_QDEPTH) && ((cmd->cmnd[0] == READ_10) || (cmd->cmnd[0] == WRITE_10))) pnode->cmd_qdepth = atomic_read(&pnode->cmd_pending); pnode->last_change_time = jiffies; } spin_unlock_irqrestore(shost->host_lock, flags); } else if (pnode && NLP_CHK_NODE_ACT(pnode)) { if ((pnode->cmd_qdepth < LPFC_MAX_TGT_QDEPTH) && time_after(jiffies, pnode->last_change_time + msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) { spin_lock_irqsave(shost->host_lock, flags); pnode->cmd_qdepth += pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT / 100; if (pnode->cmd_qdepth > LPFC_MAX_TGT_QDEPTH) pnode->cmd_qdepth = LPFC_MAX_TGT_QDEPTH; pnode->last_change_time = jiffies; spin_unlock_irqrestore(shost->host_lock, flags); } } lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); /* The sdev is not guaranteed to be valid post scsi_done upcall. */ queue_depth = cmd->device->queue_depth; scsi_id = cmd->device->id; cmd->scsi_done(cmd); if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { /* * If there is a thread waiting for command completion * wake up the thread. */ spin_lock_irqsave(shost->host_lock, flags); lpfc_cmd->pCmd = NULL; if (lpfc_cmd->waitq) wake_up(lpfc_cmd->waitq); spin_unlock_irqrestore(shost->host_lock, flags); lpfc_release_scsi_buf(phba, lpfc_cmd); return; } if (!result) lpfc_rampup_queue_depth(vport, queue_depth); if (!result && pnode && NLP_CHK_NODE_ACT(pnode) && ((jiffies - pnode->last_ramp_up_time) > LPFC_Q_RAMP_UP_INTERVAL * HZ) && ((jiffies - pnode->last_q_full_time) > LPFC_Q_RAMP_UP_INTERVAL * HZ) && (vport->cfg_lun_queue_depth > queue_depth)) { shost_for_each_device(tmp_sdev, shost) { if (vport->cfg_lun_queue_depth > tmp_sdev->queue_depth){ if (tmp_sdev->id != scsi_id) continue; if (tmp_sdev->ordered_tags) scsi_adjust_queue_depth(tmp_sdev, MSG_ORDERED_TAG, tmp_sdev->queue_depth+1); else scsi_adjust_queue_depth(tmp_sdev, MSG_SIMPLE_TAG, tmp_sdev->queue_depth+1); pnode->last_ramp_up_time = jiffies; } } lpfc_send_sdev_queuedepth_change_event(phba, vport, pnode, 0xFFFFFFFF, queue_depth , queue_depth + 1); } /* * Check for queue full. If the lun is reporting queue full, then * back off the lun queue depth to prevent target overloads. */ if (result == SAM_STAT_TASK_SET_FULL && pnode && NLP_CHK_NODE_ACT(pnode)) { pnode->last_q_full_time = jiffies; shost_for_each_device(tmp_sdev, shost) { if (tmp_sdev->id != scsi_id) continue; depth = scsi_track_queue_full(tmp_sdev, tmp_sdev->queue_depth - 1); } /* * The queue depth cannot be lowered any more. * Modify the returned error code to store * the final depth value set by * scsi_track_queue_full. */ if (depth == -1) depth = shost->cmd_per_lun; if (depth) { lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, "0711 detected queue full - lun queue " "depth adjusted to %d.\n", depth); lpfc_send_sdev_queuedepth_change_event(phba, vport, pnode, 0xFFFFFFFF, depth+1, depth); } } /* * If there is a thread waiting for command completion * wake up the thread. */ spin_lock_irqsave(shost->host_lock, flags); lpfc_cmd->pCmd = NULL; if (lpfc_cmd->waitq) wake_up(lpfc_cmd->waitq); spin_unlock_irqrestore(shost->host_lock, flags); lpfc_release_scsi_buf(phba, lpfc_cmd); } /** * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB * @data: A pointer to the immediate command data portion of the IOCB. * @fcp_cmnd: The FCP Command that is provided by the SCSI layer. * * The routine copies the entire FCP command from @fcp_cmnd to @data while * byte swapping the data to big endian format for transmission on the wire. **/ static void lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd) { int i, j; for (i = 0, j = 0; i < sizeof(struct fcp_cmnd); i += sizeof(uint32_t), j++) { ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]); } } /** * lpfc_scsi_prep_cmnd - Routine to convert scsi cmnd to FCP information unit * @vport: The virtual port for which this call is being executed. * @lpfc_cmd: The scsi command which needs to send. * @pnode: Pointer to lpfc_nodelist. * * This routine initializes fcp_cmnd and iocb data structure from scsi command * to transfer. **/ static void lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_nodelist *pnode) { struct lpfc_hba *phba = vport->phba; struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq); int datadir = scsi_cmnd->sc_data_direction; char tag[2]; if (!pnode || !NLP_CHK_NODE_ACT(pnode)) return; lpfc_cmd->fcp_rsp->rspSnsLen = 0; /* clear task management bits */ lpfc_cmd->fcp_cmnd->fcpCntl2 = 0; int_to_scsilun(lpfc_cmd->pCmd->device->lun, &lpfc_cmd->fcp_cmnd->fcp_lun); memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16); if (scsi_populate_tag_msg(scsi_cmnd, tag)) { switch (tag[0]) { case HEAD_OF_QUEUE_TAG: fcp_cmnd->fcpCntl1 = HEAD_OF_Q; break; case ORDERED_QUEUE_TAG: fcp_cmnd->fcpCntl1 = ORDERED_Q; break; default: fcp_cmnd->fcpCntl1 = SIMPLE_Q; break; } } else fcp_cmnd->fcpCntl1 = 0; /* * There are three possibilities here - use scatter-gather segment, use * the single mapping, or neither. Start the lpfc command prep by * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first * data bde entry. */ if (scsi_sg_count(scsi_cmnd)) { if (datadir == DMA_TO_DEVICE) { iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; iocb_cmd->un.fcpi.fcpi_parm = 0; iocb_cmd->ulpPU = 0; fcp_cmnd->fcpCntl3 = WRITE_DATA; phba->fc4OutputRequests++; } else { iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; iocb_cmd->ulpPU = PARM_READ_CHECK; fcp_cmnd->fcpCntl3 = READ_DATA; phba->fc4InputRequests++; } } else { iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR; iocb_cmd->un.fcpi.fcpi_parm = 0; iocb_cmd->ulpPU = 0; fcp_cmnd->fcpCntl3 = 0; phba->fc4ControlRequests++; } if (phba->sli_rev == 3 && !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd); /* * Finish initializing those IOCB fields that are independent * of the scsi_cmnd request_buffer */ piocbq->iocb.ulpContext = pnode->nlp_rpi; if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE) piocbq->iocb.ulpFCP2Rcvy = 1; else piocbq->iocb.ulpFCP2Rcvy = 0; piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f); piocbq->context1 = lpfc_cmd; piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; piocbq->iocb.ulpTimeout = lpfc_cmd->timeout; piocbq->vport = vport; } /** * lpfc_scsi_prep_task_mgmt_cmnd - Convert scsi TM cmnd to FCP information unit * @vport: The virtual port for which this call is being executed. * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. * @lun: Logical unit number. * @task_mgmt_cmd: SCSI task management command. * * This routine creates FCP information unit corresponding to @task_mgmt_cmd. * * Return codes: * 0 - Error * 1 - Success **/ static int lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, unsigned int lun, uint8_t task_mgmt_cmd) { struct lpfc_iocbq *piocbq; IOCB_t *piocb; struct fcp_cmnd *fcp_cmnd; struct lpfc_rport_data *rdata = lpfc_cmd->rdata; struct lpfc_nodelist *ndlp = rdata->pnode; if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) || ndlp->nlp_state != NLP_STE_MAPPED_NODE) return 0; piocbq = &(lpfc_cmd->cur_iocbq); piocbq->vport = vport; piocb = &piocbq->iocb; fcp_cmnd = lpfc_cmd->fcp_cmnd; /* Clear out any old data in the FCP command area */ memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); int_to_scsilun(lun, &fcp_cmnd->fcp_lun); fcp_cmnd->fcpCntl2 = task_mgmt_cmd; if (vport->phba->sli_rev == 3 && !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED)) lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd); piocb->ulpCommand = CMD_FCP_ICMND64_CR; piocb->ulpContext = ndlp->nlp_rpi; if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) { piocb->ulpFCP2Rcvy = 1; } piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f); /* ulpTimeout is only one byte */ if (lpfc_cmd->timeout > 0xff) { /* * Do not timeout the command at the firmware level. * The driver will provide the timeout mechanism. */ piocb->ulpTimeout = 0; } else { piocb->ulpTimeout = lpfc_cmd->timeout; } return 1; } /** * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command * @phba: The Hba for which this call is being executed. * @cmdiocbq: Pointer to lpfc_iocbq data structure. * @rspiocbq: Pointer to lpfc_iocbq data structure. * * This routine is IOCB completion routine for device reset and target reset * routine. This routine release scsi buffer associated with lpfc_cmd. **/ static void lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocbq, struct lpfc_iocbq *rspiocbq) { struct lpfc_scsi_buf *lpfc_cmd = (struct lpfc_scsi_buf *) cmdiocbq->context1; if (lpfc_cmd) lpfc_release_scsi_buf(phba, lpfc_cmd); return; } /** * lpfc_scsi_tgt_reset - Target reset handler * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure * @vport: The virtual port for which this call is being executed. * @tgt_id: Target ID. * @lun: Lun number. * @rdata: Pointer to lpfc_rport_data. * * This routine issues a TARGET RESET iocb to reset a target with @tgt_id ID. * * Return Code: * 0x2003 - Error * 0x2002 - Success. **/ static int lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport, unsigned tgt_id, unsigned int lun, struct lpfc_rport_data *rdata) { struct lpfc_hba *phba = vport->phba; struct lpfc_iocbq *iocbq; struct lpfc_iocbq *iocbqrsp; int ret; int status; if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode)) return FAILED; lpfc_cmd->rdata = rdata; status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun, FCP_TARGET_RESET); if (!status) return FAILED; iocbq = &lpfc_cmd->cur_iocbq; iocbqrsp = lpfc_sli_get_iocbq(phba); if (!iocbqrsp) return FAILED; /* Issue Target Reset to TGT <num> */ lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, "0702 Issue Target Reset to TGT %d Data: x%x x%x\n", tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag); status = lpfc_sli_issue_iocb_wait(phba, &phba->sli.ring[phba->sli.fcp_ring], iocbq, iocbqrsp, lpfc_cmd->timeout); if (status != IOCB_SUCCESS) { if (status == IOCB_TIMEDOUT) { iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; ret = TIMEOUT_ERROR; } else ret = FAILED; lpfc_cmd->status = IOSTAT_DRIVER_REJECT; } else { ret = SUCCESS; lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4]; lpfc_cmd->status = iocbqrsp->iocb.ulpStatus; if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && (lpfc_cmd->result & IOERR_DRVR_MASK)) lpfc_cmd->status = IOSTAT_DRIVER_REJECT; } lpfc_sli_release_iocbq(phba, iocbqrsp); return ret; } /** * lpfc_info - Info entry point of scsi_host_template data structure * @host: The scsi host for which this call is being executed. * * This routine provides module information about hba. * * Reutrn code: * Pointer to char - Success. **/ const char * lpfc_info(struct Scsi_Host *host) { struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata; struct lpfc_hba *phba = vport->phba; int len; static char lpfcinfobuf[384]; memset(lpfcinfobuf,0,384); if (phba && phba->pcidev){ strncpy(lpfcinfobuf, phba->ModelDesc, 256); len = strlen(lpfcinfobuf); snprintf(lpfcinfobuf + len, 384-len, " on PCI bus %02x device %02x irq %d", phba->pcidev->bus->number, phba->pcidev->devfn, phba->pcidev->irq); len = strlen(lpfcinfobuf); if (phba->Port[0]) { snprintf(lpfcinfobuf + len, 384-len, " port %s", phba->Port); } } return lpfcinfobuf; } /** * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba * @phba: The Hba for which this call is being executed. * * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo. * The default value of cfg_poll_tmo is 10 milliseconds. **/ static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba) { unsigned long poll_tmo_expires = (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo)); if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt) mod_timer(&phba->fcp_poll_timer, poll_tmo_expires); } /** * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA * @phba: The Hba for which this call is being executed. * * This routine starts the fcp_poll_timer of @phba. **/ void lpfc_poll_start_timer(struct lpfc_hba * phba) { lpfc_poll_rearm_timer(phba); } /** * lpfc_poll_timeout - Restart polling timer * @ptr: Map to lpfc_hba data structure pointer. * * This routine restarts fcp_poll timer, when FCP ring polling is enable * and FCP Ring interrupt is disable. **/ void lpfc_poll_timeout(unsigned long ptr) { struct lpfc_hba *phba = (struct lpfc_hba *) ptr; if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { lpfc_sli_poll_fcp_ring (phba); if (phba->cfg_poll & DISABLE_FCP_RING_INT) lpfc_poll_rearm_timer(phba); } } /** * lpfc_queuecommand - scsi_host_template queuecommand entry point * @cmnd: Pointer to scsi_cmnd data structure. * @done: Pointer to done routine. * * Driver registers this routine to scsi midlayer to submit a @cmd to process. * This routine prepares an IOCB from scsi command and provides to firmware. * The @done callback is invoked after driver finished processing the command. * * Return value : * 0 - Success * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily. **/ static int lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) { struct Scsi_Host *shost = cmnd->device->host; struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; struct lpfc_hba *phba = vport->phba; struct lpfc_sli *psli = &phba->sli; struct lpfc_rport_data *rdata = cmnd->device->hostdata; struct lpfc_nodelist *ndlp = rdata->pnode; struct lpfc_scsi_buf *lpfc_cmd; struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); int err; err = fc_remote_port_chkready(rport); if (err) { cmnd->result = err; goto out_fail_command; } if (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) { printk(KERN_ERR "BLKGRD ERROR: rcvd protected cmd:%02x op:%02x " "str=%s without registering for BlockGuard - " "Rejecting command\n", cmnd->cmnd[0], scsi_get_prot_op(cmnd), dif_op_str[scsi_get_prot_op(cmnd)]); goto out_fail_command; } /* * Catch race where our node has transitioned, but the * transport is still transitioning. */ if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) { cmnd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0); goto out_fail_command; } if (vport->cfg_max_scsicmpl_time && (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)) goto out_host_busy; lpfc_cmd = lpfc_get_scsi_buf(phba); if (lpfc_cmd == NULL) { lpfc_rampdown_queue_depth(phba); lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, "0707 driver's buffer pool is empty, " "IO busied\n"); goto out_host_busy; } /* * Store the midlayer's command structure for the completion phase * and complete the command initialization. */ lpfc_cmd->pCmd = cmnd; lpfc_cmd->rdata = rdata; lpfc_cmd->timeout = 0; lpfc_cmd->start_time = jiffies; cmnd->host_scribble = (unsigned char *)lpfc_cmd; cmnd->scsi_done = done; if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) { lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, "9033 BLKGRD: rcvd protected cmd:%02x op:%02x " "str=%s\n", cmnd->cmnd[0], scsi_get_prot_op(cmnd), dif_op_str[scsi_get_prot_op(cmnd)]); lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, "9034 BLKGRD: CDB: %02x %02x %02x %02x %02x " "%02x %02x %02x %02x %02x \n", cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2], cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5], cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8], cmnd->cmnd[9]); if (cmnd->cmnd[0] == READ_10) lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, "9035 BLKGRD: READ @ sector %llu, " "count %lu\n", (unsigned long long)scsi_get_lba(cmnd), cmnd->request->nr_sectors); else if (cmnd->cmnd[0] == WRITE_10) lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, "9036 BLKGRD: WRITE @ sector %llu, " "count %lu cmd=%p\n", (unsigned long long)scsi_get_lba(cmnd), cmnd->request->nr_sectors, cmnd); err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); } else { lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, "9038 BLKGRD: rcvd unprotected cmd:%02x op:%02x" " str=%s\n", cmnd->cmnd[0], scsi_get_prot_op(cmnd), dif_op_str[scsi_get_prot_op(cmnd)]); lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, "9039 BLKGRD: CDB: %02x %02x %02x %02x %02x " "%02x %02x %02x %02x %02x \n", cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2], cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5], cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8], cmnd->cmnd[9]); if (cmnd->cmnd[0] == READ_10) lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, "9040 dbg: READ @ sector %llu, " "count %lu\n", (unsigned long long)scsi_get_lba(cmnd), cmnd->request->nr_sectors); else if (cmnd->cmnd[0] == WRITE_10) lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, "9041 dbg: WRITE @ sector %llu, " "count %lu cmd=%p\n", (unsigned long long)scsi_get_lba(cmnd), cmnd->request->nr_sectors, cmnd); else lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, "9042 dbg: parser not implemented\n"); err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); } if (err) goto out_host_busy_free_buf; lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp); atomic_inc(&ndlp->cmd_pending); err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring], &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB); if (err) { atomic_dec(&ndlp->cmd_pending); goto out_host_busy_free_buf; } if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { lpfc_sli_poll_fcp_ring(phba); if (phba->cfg_poll & DISABLE_FCP_RING_INT) lpfc_poll_rearm_timer(phba); } return 0; out_host_busy_free_buf: lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); lpfc_release_scsi_buf(phba, lpfc_cmd); out_host_busy: return SCSI_MLQUEUE_HOST_BUSY; out_fail_command: done(cmnd); return 0; } /** * lpfc_block_error_handler - Routine to block error handler * @cmnd: Pointer to scsi_cmnd data structure. * * This routine blocks execution till fc_rport state is not FC_PORSTAT_BLCOEKD. **/ static void lpfc_block_error_handler(struct scsi_cmnd *cmnd) { struct Scsi_Host *shost = cmnd->device->host; struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); spin_lock_irq(shost->host_lock); while (rport->port_state == FC_PORTSTATE_BLOCKED) { spin_unlock_irq(shost->host_lock); msleep(1000); spin_lock_irq(shost->host_lock); } spin_unlock_irq(shost->host_lock); return; } /** * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point * @cmnd: Pointer to scsi_cmnd data structure. * * This routine aborts @cmnd pending in base driver. * * Return code : * 0x2003 - Error * 0x2002 - Success **/ static int lpfc_abort_handler(struct scsi_cmnd *cmnd) { struct Scsi_Host *shost = cmnd->device->host; struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; struct lpfc_hba *phba = vport->phba; struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring]; struct lpfc_iocbq *iocb; struct lpfc_iocbq *abtsiocb; struct lpfc_scsi_buf *lpfc_cmd; IOCB_t *cmd, *icmd; int ret = SUCCESS; DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq); lpfc_block_error_handler(cmnd); lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble; BUG_ON(!lpfc_cmd); /* * If pCmd field of the corresponding lpfc_scsi_buf structure * points to a different SCSI command, then the driver has * already completed this command, but the midlayer did not * see the completion before the eh fired. Just return * SUCCESS. */ iocb = &lpfc_cmd->cur_iocbq; if (lpfc_cmd->pCmd != cmnd) goto out; BUG_ON(iocb->context1 != lpfc_cmd); abtsiocb = lpfc_sli_get_iocbq(phba); if (abtsiocb == NULL) { ret = FAILED; goto out; } /* * The scsi command can not be in txq and it is in flight because the * pCmd is still pointig at the SCSI command we have to abort. There * is no need to search the txcmplq. Just send an abort to the FW. */ cmd = &iocb->iocb; icmd = &abtsiocb->iocb; icmd->un.acxri.abortType = ABORT_TYPE_ABTS; icmd->un.acxri.abortContextTag = cmd->ulpContext; icmd->un.acxri.abortIoTag = cmd->ulpIoTag; icmd->ulpLe = 1; icmd->ulpClass = cmd->ulpClass; if (lpfc_is_link_up(phba)) icmd->ulpCommand = CMD_ABORT_XRI_CN; else icmd->ulpCommand = CMD_CLOSE_XRI_CN; abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl; abtsiocb->vport = vport; if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) { lpfc_sli_release_iocbq(phba, abtsiocb); ret = FAILED; goto out; } if (phba->cfg_poll & DISABLE_FCP_RING_INT) lpfc_sli_poll_fcp_ring (phba); lpfc_cmd->waitq = &waitq; /* Wait for abort to complete */ wait_event_timeout(waitq, (lpfc_cmd->pCmd != cmnd), (2*vport->cfg_devloss_tmo*HZ)); spin_lock_irq(shost->host_lock); lpfc_cmd->waitq = NULL; spin_unlock_irq(shost->host_lock); if (lpfc_cmd->pCmd == cmnd) { ret = FAILED; lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0748 abort handler timed out waiting " "for abort to complete: ret %#x, ID %d, " "LUN %d, snum %#lx\n", ret, cmnd->device->id, cmnd->device->lun, cmnd->serial_number); } out: lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, "0749 SCSI Layer I/O Abort Request Status x%x ID %d " "LUN %d snum %#lx\n", ret, cmnd->device->id, cmnd->device->lun, cmnd->serial_number); return ret; } /** * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point * @cmnd: Pointer to scsi_cmnd data structure. * * This routine does a device reset by sending a TARGET_RESET task management * command. * * Return code : * 0x2003 - Error * 0x2002 - Success **/ static int lpfc_device_reset_handler(struct scsi_cmnd *cmnd) { struct Scsi_Host *shost = cmnd->device->host; struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; struct lpfc_hba *phba = vport->phba; struct lpfc_scsi_buf *lpfc_cmd; struct lpfc_iocbq *iocbq, *iocbqrsp; struct lpfc_rport_data *rdata = cmnd->device->hostdata; struct lpfc_nodelist *pnode = rdata->pnode; unsigned long later; int ret = SUCCESS; int status; int cnt; struct lpfc_scsi_event_header scsi_event; lpfc_block_error_handler(cmnd); /* * If target is not in a MAPPED state, delay the reset until * target is rediscovered or devloss timeout expires. */ later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; while (time_after(later, jiffies)) { if (!pnode || !NLP_CHK_NODE_ACT(pnode)) return FAILED; if (pnode->nlp_state == NLP_STE_MAPPED_NODE) break; schedule_timeout_uninterruptible(msecs_to_jiffies(500)); rdata = cmnd->device->hostdata; if (!rdata) break; pnode = rdata->pnode; } scsi_event.event_type = FC_REG_SCSI_EVENT; scsi_event.subcategory = LPFC_EVENT_TGTRESET; scsi_event.lun = 0; memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); fc_host_post_vendor_event(shost, fc_get_event_number(), sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); if (!rdata || pnode->nlp_state != NLP_STE_MAPPED_NODE) { lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0721 LUN Reset rport " "failure: msec x%x rdata x%p\n", jiffies_to_msecs(jiffies - later), rdata); return FAILED; } lpfc_cmd = lpfc_get_scsi_buf(phba); if (lpfc_cmd == NULL) return FAILED; lpfc_cmd->timeout = 60; lpfc_cmd->rdata = rdata; status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, cmnd->device->lun, FCP_TARGET_RESET); if (!status) { lpfc_release_scsi_buf(phba, lpfc_cmd); return FAILED; } iocbq = &lpfc_cmd->cur_iocbq; /* get a buffer for this IOCB command response */ iocbqrsp = lpfc_sli_get_iocbq(phba); if (iocbqrsp == NULL) { lpfc_release_scsi_buf(phba, lpfc_cmd); return FAILED; } lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, "0703 Issue target reset to TGT %d LUN %d " "rpi x%x nlp_flag x%x\n", cmnd->device->id, cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag); status = lpfc_sli_issue_iocb_wait(phba, &phba->sli.ring[phba->sli.fcp_ring], iocbq, iocbqrsp, lpfc_cmd->timeout); if (status == IOCB_TIMEDOUT) { iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; ret = TIMEOUT_ERROR; } else { if (status != IOCB_SUCCESS) ret = FAILED; lpfc_release_scsi_buf(phba, lpfc_cmd); } lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0713 SCSI layer issued device reset (%d, %d) " "return x%x status x%x result x%x\n", cmnd->device->id, cmnd->device->lun, ret, iocbqrsp->iocb.ulpStatus, iocbqrsp->iocb.un.ulpWord[4]); lpfc_sli_release_iocbq(phba, iocbqrsp); cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun, LPFC_CTX_TGT); if (cnt) lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring], cmnd->device->id, cmnd->device->lun, LPFC_CTX_TGT); later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; while (time_after(later, jiffies) && cnt) { schedule_timeout_uninterruptible(msecs_to_jiffies(20)); cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun, LPFC_CTX_TGT); } if (cnt) { lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0719 device reset I/O flush failure: " "cnt x%x\n", cnt); ret = FAILED; } return ret; } /** * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point * @cmnd: Pointer to scsi_cmnd data structure. * * This routine does target reset to all target on @cmnd->device->host. * * Return Code: * 0x2003 - Error * 0x2002 - Success **/ static int lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) { struct Scsi_Host *shost = cmnd->device->host; struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; struct lpfc_hba *phba = vport->phba; struct lpfc_nodelist *ndlp = NULL; int match; int ret = SUCCESS, status = SUCCESS, i; int cnt; struct lpfc_scsi_buf * lpfc_cmd; unsigned long later; struct lpfc_scsi_event_header scsi_event; scsi_event.event_type = FC_REG_SCSI_EVENT; scsi_event.subcategory = LPFC_EVENT_BUSRESET; scsi_event.lun = 0; memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name)); memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name)); fc_host_post_vendor_event(shost, fc_get_event_number(), sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); lpfc_block_error_handler(cmnd); /* * Since the driver manages a single bus device, reset all * targets known to the driver. Should any target reset * fail, this routine returns failure to the midlayer. */ for (i = 0; i < LPFC_MAX_TARGET; i++) { /* Search for mapped node by target ID */ match = 0; spin_lock_irq(shost->host_lock); list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) { if (!NLP_CHK_NODE_ACT(ndlp)) continue; if (ndlp->nlp_state == NLP_STE_MAPPED_NODE && ndlp->nlp_sid == i && ndlp->rport) { match = 1; break; } } spin_unlock_irq(shost->host_lock); if (!match) continue; lpfc_cmd = lpfc_get_scsi_buf(phba); if (lpfc_cmd) { lpfc_cmd->timeout = 60; status = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i, cmnd->device->lun, ndlp->rport->dd_data); if (status != TIMEOUT_ERROR) lpfc_release_scsi_buf(phba, lpfc_cmd); } if (!lpfc_cmd || status != SUCCESS) { lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0700 Bus Reset on target %d failed\n", i); ret = FAILED; } } /* * All outstanding txcmplq I/Os should have been aborted by * the targets. Unfortunately, some targets do not abide by * this forcing the driver to double check. */ cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST); if (cnt) lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring], 0, 0, LPFC_CTX_HOST); later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; while (time_after(later, jiffies) && cnt) { schedule_timeout_uninterruptible(msecs_to_jiffies(20)); cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST); } if (cnt) { lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0715 Bus Reset I/O flush failure: " "cnt x%x left x%x\n", cnt, i); ret = FAILED; } lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0714 SCSI layer issued Bus Reset Data: x%x\n", ret); return ret; } /** * lpfc_slave_alloc - scsi_host_template slave_alloc entry point * @sdev: Pointer to scsi_device. * * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's * globally available list of scsi buffers. This routine also makes sure scsi * buffer is not allocated more than HBA limit conveyed to midlayer. This list * of scsi buffer exists for the lifetime of the driver. * * Return codes: * non-0 - Error * 0 - Success **/ static int lpfc_slave_alloc(struct scsi_device *sdev) { struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; struct lpfc_hba *phba = vport->phba; struct lpfc_scsi_buf *scsi_buf = NULL; struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); uint32_t total = 0, i; uint32_t num_to_alloc = 0; unsigned long flags; if (!rport || fc_remote_port_chkready(rport)) return -ENXIO; sdev->hostdata = rport->dd_data; /* * Populate the cmds_per_lun count scsi_bufs into this host's globally * available list of scsi buffers. Don't allocate more than the * HBA limit conveyed to the midlayer via the host structure. The * formula accounts for the lun_queue_depth + error handlers + 1 * extra. This list of scsi bufs exists for the lifetime of the driver. */ total = phba->total_scsi_bufs; num_to_alloc = vport->cfg_lun_queue_depth + 2; /* Allow some exchanges to be available always to complete discovery */ if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, "0704 At limitation of %d preallocated " "command buffers\n", total); return 0; /* Allow some exchanges to be available always to complete discovery */ } else if (total + num_to_alloc > phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, "0705 Allocation request of %d " "command buffers will exceed max of %d. " "Reducing allocation request to %d.\n", num_to_alloc, phba->cfg_hba_queue_depth, (phba->cfg_hba_queue_depth - total)); num_to_alloc = phba->cfg_hba_queue_depth - total; } for (i = 0; i < num_to_alloc; i++) { scsi_buf = lpfc_new_scsi_buf(vport); if (!scsi_buf) { lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0706 Failed to allocate " "command buffer\n"); break; } spin_lock_irqsave(&phba->scsi_buf_list_lock, flags); phba->total_scsi_bufs++; list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list); spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags); } return 0; } /** * lpfc_slave_configure - scsi_host_template slave_configure entry point * @sdev: Pointer to scsi_device. * * This routine configures following items * - Tag command queuing support for @sdev if supported. * - Dev loss time out value of fc_rport. * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set. * * Return codes: * 0 - Success **/ static int lpfc_slave_configure(struct scsi_device *sdev) { struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; struct lpfc_hba *phba = vport->phba; struct fc_rport *rport = starget_to_rport(sdev->sdev_target); if (sdev->tagged_supported) scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth); else scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth); /* * Initialize the fc transport attributes for the target * containing this scsi device. Also note that the driver's * target pointer is stored in the starget_data for the * driver's sysfs entry point functions. */ rport->dev_loss_tmo = vport->cfg_devloss_tmo; if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { lpfc_sli_poll_fcp_ring(phba); if (phba->cfg_poll & DISABLE_FCP_RING_INT) lpfc_poll_rearm_timer(phba); } return 0; } /** * lpfc_slave_destroy - slave_destroy entry point of SHT data structure * @sdev: Pointer to scsi_device. * * This routine sets @sdev hostatdata filed to null. **/ static void lpfc_slave_destroy(struct scsi_device *sdev) { sdev->hostdata = NULL; return; } struct scsi_host_template lpfc_template = { .module = THIS_MODULE, .name = LPFC_DRIVER_NAME, .info = lpfc_info, .queuecommand = lpfc_queuecommand, .eh_abort_handler = lpfc_abort_handler, .eh_device_reset_handler= lpfc_device_reset_handler, .eh_bus_reset_handler = lpfc_bus_reset_handler, .slave_alloc = lpfc_slave_alloc, .slave_configure = lpfc_slave_configure, .slave_destroy = lpfc_slave_destroy, .scan_finished = lpfc_scan_finished, .this_id = -1, .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, .cmd_per_lun = LPFC_CMD_PER_LUN, .use_clustering = ENABLE_CLUSTERING, .shost_attrs = lpfc_hba_attrs, .max_sectors = 0xFFFF, }; struct scsi_host_template lpfc_vport_template = { .module = THIS_MODULE, .name = LPFC_DRIVER_NAME, .info = lpfc_info, .queuecommand = lpfc_queuecommand, .eh_abort_handler = lpfc_abort_handler, .eh_device_reset_handler= lpfc_device_reset_handler, .eh_bus_reset_handler = lpfc_bus_reset_handler, .slave_alloc = lpfc_slave_alloc, .slave_configure = lpfc_slave_configure, .slave_destroy = lpfc_slave_destroy, .scan_finished = lpfc_scan_finished, .this_id = -1, .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, .cmd_per_lun = LPFC_CMD_PER_LUN, .use_clustering = ENABLE_CLUSTERING, .shost_attrs = lpfc_vport_attrs, .max_sectors = 0xFFFF, }; |