summaryrefslogtreecommitdiffstats
path: root/drivers/block/cciss.c
blob: bc6602606fb541726f1537f610cc4d80d340ca2d (plain)
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
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
/*
 *    Disk Array driver for HP SA 5xxx and 6xxx Controllers
 *    Copyright 2000, 2006 Hewlett-Packard Development Company, L.P.
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 *    NON INFRINGEMENT.  See the GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *    Questions/Comments/Bugfixes to iss_storagedev@hp.com
 *
 */

#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/major.h>
#include <linux/fs.h>
#include <linux/bio.h>
#include <linux/blkpg.h>
#include <linux/timer.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/hdreg.h>
#include <linux/spinlock.h>
#include <linux/compat.h>
#include <linux/blktrace_api.h>
#include <asm/uaccess.h>
#include <asm/io.h>

#include <linux/dma-mapping.h>
#include <linux/blkdev.h>
#include <linux/genhd.h>
#include <linux/completion.h>

#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
#define DRIVER_NAME "HP CISS Driver (v 3.6.10)"
#define DRIVER_VERSION CCISS_DRIVER_VERSION(3,6,10)

/* Embedded module documentation macros - see modules.h */
MODULE_AUTHOR("Hewlett-Packard Company");
MODULE_DESCRIPTION("Driver for HP Controller SA5xxx SA6xxx version 3.6.10");
MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
			" SA6i P600 P800 P400 P400i E200 E200i E500");
MODULE_LICENSE("GPL");

#include "cciss_cmd.h"
#include "cciss.h"
#include <linux/cciss_ioctl.h>

/* define the PCI info for the cards we can control */
static const struct pci_device_id cciss_pci_device_id[] = {
	{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS,  0x0E11, 0x4070},
	{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
	{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
	{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
	{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
	{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
	{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
	{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
	{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSA,     0x103C, 0x3225},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSC,     0x103C, 0x3223},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSC,     0x103C, 0x3234},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSC,     0x103C, 0x3235},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSD,     0x103C, 0x3211},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSD,     0x103C, 0x3212},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSD,     0x103C, 0x3213},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSD,     0x103C, 0x3214},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSD,     0x103C, 0x3215},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSC,     0x103C, 0x3233},
	{0,}
};

MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);

/*  board_id = Subsystem Device ID & Vendor ID
 *  product = Marketing Name for the board
 *  access = Address of the struct of function pointers
 */
static struct board_type products[] = {
	{0x40700E11, "Smart Array 5300", &SA5_access},
	{0x40800E11, "Smart Array 5i", &SA5B_access},
	{0x40820E11, "Smart Array 532", &SA5B_access},
	{0x40830E11, "Smart Array 5312", &SA5B_access},
	{0x409A0E11, "Smart Array 641", &SA5_access},
	{0x409B0E11, "Smart Array 642", &SA5_access},
	{0x409C0E11, "Smart Array 6400", &SA5_access},
	{0x409D0E11, "Smart Array 6400 EM", &SA5_access},
	{0x40910E11, "Smart Array 6i", &SA5_access},
	{0x3225103C, "Smart Array P600", &SA5_access},
	{0x3223103C, "Smart Array P800", &SA5_access},
	{0x3234103C, "Smart Array P400", &SA5_access},
	{0x3235103C, "Smart Array P400i", &SA5_access},
	{0x3211103C, "Smart Array E200i", &SA5_access},
	{0x3212103C, "Smart Array E200", &SA5_access},
	{0x3213103C, "Smart Array E200i", &SA5_access},
	{0x3214103C, "Smart Array E200i", &SA5_access},
	{0x3215103C, "Smart Array E200i", &SA5_access},
	{0x3233103C, "Smart Array E500", &SA5_access},
};

/* How long to wait (in milliseconds) for board to go into simple mode */
#define MAX_CONFIG_WAIT 30000
#define MAX_IOCTL_CONFIG_WAIT 1000

/*define how many times we will try a command because of bus resets */
#define MAX_CMD_RETRIES 3

#define READ_AHEAD 	 1024
#define NR_CMDS		 384	/* #commands that can be outstanding */
#define MAX_CTLR	32

/* Originally cciss driver only supports 8 major numbers */
#define MAX_CTLR_ORIG 	8

static ctlr_info_t *hba[MAX_CTLR];

static void do_cciss_request(request_queue_t *q);
static irqreturn_t do_cciss_intr(int irq, void *dev_id);
static int cciss_open(struct inode *inode, struct file *filep);
static int cciss_release(struct inode *inode, struct file *filep);
static int cciss_ioctl(struct inode *inode, struct file *filep,
		       unsigned int cmd, unsigned long arg);
static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);

static int revalidate_allvol(ctlr_info_t *host);
static int cciss_revalidate(struct gendisk *disk);
static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk);
static int deregister_disk(struct gendisk *disk, drive_info_struct *drv,
			   int clear_all);

static void cciss_read_capacity(int ctlr, int logvol, int withirq,
			sector_t *total_size, unsigned int *block_size);
static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
			sector_t *total_size, unsigned int *block_size);
static void cciss_geometry_inquiry(int ctlr, int logvol,
			int withirq, sector_t total_size,
			unsigned int block_size, InquiryData_struct *inq_buff,
				   drive_info_struct *drv);
static void cciss_getgeometry(int cntl_num);
static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
					   __u32);
static void start_io(ctlr_info_t *h);
static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
		   unsigned int use_unit_num, unsigned int log_unit,
		   __u8 page_code, unsigned char *scsi3addr, int cmd_type);
static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
			   unsigned int use_unit_num, unsigned int log_unit,
			   __u8 page_code, int cmd_type);

static void fail_all_cmds(unsigned long ctlr);

#ifdef CONFIG_PROC_FS
static int cciss_proc_get_info(char *buffer, char **start, off_t offset,
			       int length, int *eof, void *data);
static void cciss_procinit(int i);
#else
static void cciss_procinit(int i)
{
}
#endif				/* CONFIG_PROC_FS */

#ifdef CONFIG_COMPAT
static long cciss_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg);
#endif

static struct block_device_operations cciss_fops = {
	.owner = THIS_MODULE,
	.open = cciss_open,
	.release = cciss_release,
	.ioctl = cciss_ioctl,
	.getgeo = cciss_getgeo,
#ifdef CONFIG_COMPAT
	.compat_ioctl = cciss_compat_ioctl,
#endif
	.revalidate_disk = cciss_revalidate,
};

/*
 * Enqueuing and dequeuing functions for cmdlists.
 */
static inline void addQ(CommandList_struct **Qptr, CommandList_struct *c)
{
	if (*Qptr == NULL) {
		*Qptr = c;
		c->next = c->prev = c;
	} else {
		c->prev = (*Qptr)->prev;
		c->next = (*Qptr);
		(*Qptr)->prev->next = c;
		(*Qptr)->prev = c;
	}
}

static inline CommandList_struct *removeQ(CommandList_struct **Qptr,
					  CommandList_struct *c)
{
	if (c && c->next != c) {
		if (*Qptr == c)
			*Qptr = c->next;
		c->prev->next = c->next;
		c->next->prev = c->prev;
	} else {
		*Qptr = NULL;
	}
	return c;
}

#include "cciss_scsi.c"		/* For SCSI tape support */

#ifdef CONFIG_PROC_FS

/*
 * Report information about this controller.
 */
#define ENG_GIG 1000000000
#define ENG_GIG_FACTOR (ENG_GIG/512)
#define RAID_UNKNOWN 6
static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
	"UNKNOWN"
};

static struct proc_dir_entry *proc_cciss;

static int cciss_proc_get_info(char *buffer, char **start, off_t offset,
			       int length, int *eof, void *data)
{
	off_t pos = 0;
	off_t len = 0;
	int size, i, ctlr;
	ctlr_info_t *h = (ctlr_info_t *) data;
	drive_info_struct *drv;
	unsigned long flags;
	sector_t vol_sz, vol_sz_frac;

	ctlr = h->ctlr;

	/* prevent displaying bogus info during configuration
	 * or deconfiguration of a logical volume
	 */
	spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
	if (h->busy_configuring) {
		spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
		return -EBUSY;
	}
	h->busy_configuring = 1;
	spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);

	size = sprintf(buffer, "%s: HP %s Controller\n"
		       "Board ID: 0x%08lx\n"
		       "Firmware Version: %c%c%c%c\n"
		       "IRQ: %d\n"
		       "Logical drives: %d\n"
		       "Current Q depth: %d\n"
		       "Current # commands on controller: %d\n"
		       "Max Q depth since init: %d\n"
		       "Max # commands on controller since init: %d\n"
		       "Max SG entries since init: %d\n\n",
		       h->devname,
		       h->product_name,
		       (unsigned long)h->board_id,
		       h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
		       h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
		       h->num_luns, h->Qdepth, h->commands_outstanding,
		       h->maxQsinceinit, h->max_outstanding, h->maxSG);

	pos += size;
	len += size;
	cciss_proc_tape_report(ctlr, buffer, &pos, &len);
	for (i = 0; i <= h->highest_lun; i++) {

		drv = &h->drv[i];
		if (drv->heads == 0)
			continue;

		vol_sz = drv->nr_blocks;
		vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
		vol_sz_frac *= 100;
		sector_div(vol_sz_frac, ENG_GIG_FACTOR);

		if (drv->raid_level > 5)
			drv->raid_level = RAID_UNKNOWN;
		size = sprintf(buffer + len, "cciss/c%dd%d:"
			       "\t%4u.%02uGB\tRAID %s\n",
			       ctlr, i, (int)vol_sz, (int)vol_sz_frac,
			       raid_label[drv->raid_level]);
		pos += size;
		len += size;
	}

	*eof = 1;
	*start = buffer + offset;
	len -= offset;
	if (len > length)
		len = length;
	h->busy_configuring = 0;
	return len;
}

static int
cciss_proc_write(struct file *file, const char __user *buffer,
		 unsigned long count, void *data)
{
	unsigned char cmd[80];
	int len;
#ifdef CONFIG_CISS_SCSI_TAPE
	ctlr_info_t *h = (ctlr_info_t *) data;
	int rc;
#endif

	if (count > sizeof(cmd) - 1)
		return -EINVAL;
	if (copy_from_user(cmd, buffer, count))
		return -EFAULT;
	cmd[count] = '\0';
	len = strlen(cmd);	// above 3 lines ensure safety
	if (len && cmd[len - 1] == '\n')
		cmd[--len] = '\0';
#	ifdef CONFIG_CISS_SCSI_TAPE
	if (strcmp("engage scsi", cmd) == 0) {
		rc = cciss_engage_scsi(h->ctlr);
		if (rc != 0)
			return -rc;
		return count;
	}
	/* might be nice to have "disengage" too, but it's not
	   safely possible. (only 1 module use count, lock issues.) */
#	endif
	return -EINVAL;
}

/*
 * Get us a file in /proc/cciss that says something about each controller.
 * Create /proc/cciss if it doesn't exist yet.
 */
static void __devinit cciss_procinit(int i)
{
	struct proc_dir_entry *pde;

	if (proc_cciss == NULL) {
		proc_cciss = proc_mkdir("cciss", proc_root_driver);
		if (!proc_cciss)
			return;
	}

	pde = create_proc_read_entry(hba[i]->devname,
				     S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH,
				     proc_cciss, cciss_proc_get_info, hba[i]);
	pde->write_proc = cciss_proc_write;
}
#endif				/* CONFIG_PROC_FS */

/*
 * For operations that cannot sleep, a command block is allocated at init,
 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
 * which ones are free or in use.  For operations that can wait for kmalloc
 * to possible sleep, this routine can be called with get_from_pool set to 0.
 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
 */
static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
{
	CommandList_struct *c;
	int i;
	u64bit temp64;
	dma_addr_t cmd_dma_handle, err_dma_handle;

	if (!get_from_pool) {
		c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
			sizeof(CommandList_struct), &cmd_dma_handle);
		if (c == NULL)
			return NULL;
		memset(c, 0, sizeof(CommandList_struct));

		c->cmdindex = -1;

		c->err_info = (ErrorInfo_struct *)
		    pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
			    &err_dma_handle);

		if (c->err_info == NULL) {
			pci_free_consistent(h->pdev,
				sizeof(CommandList_struct), c, cmd_dma_handle);
			return NULL;
		}
		memset(c->err_info, 0, sizeof(ErrorInfo_struct));
	} else {		/* get it out of the controllers pool */

		do {
			i = find_first_zero_bit(h->cmd_pool_bits, NR_CMDS);
			if (i == NR_CMDS)
				return NULL;
		} while (test_and_set_bit
			 (i & (BITS_PER_LONG - 1),
			  h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
#ifdef CCISS_DEBUG
		printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
#endif
		c = h->cmd_pool + i;
		memset(c, 0, sizeof(CommandList_struct));
		cmd_dma_handle = h->cmd_pool_dhandle
		    + i * sizeof(CommandList_struct);
		c->err_info = h->errinfo_pool + i;
		memset(c->err_info, 0, sizeof(ErrorInfo_struct));
		err_dma_handle = h->errinfo_pool_dhandle
		    + i * sizeof(ErrorInfo_struct);
		h->nr_allocs++;

		c->cmdindex = i;
	}

	c->busaddr = (__u32) cmd_dma_handle;
	temp64.val = (__u64) err_dma_handle;
	c->ErrDesc.Addr.lower = temp64.val32.lower;
	c->ErrDesc.Addr.upper = temp64.val32.upper;
	c->ErrDesc.Len = sizeof(ErrorInfo_struct);

	c->ctlr = h->ctlr;
	return c;
}

/*
 * Frees a command block that was previously allocated with cmd_alloc().
 */
static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
{
	int i;
	u64bit temp64;

	if (!got_from_pool) {
		temp64.val32.lower = c->ErrDesc.Addr.lower;
		temp64.val32.upper = c->ErrDesc.Addr.upper;
		pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
				    c->err_info, (dma_addr_t) temp64.val);
		pci_free_consistent(h->pdev, sizeof(CommandList_struct),
				    c, (dma_addr_t) c->busaddr);
	} else {
		i = c - h->cmd_pool;
		clear_bit(i & (BITS_PER_LONG - 1),
			  h->cmd_pool_bits + (i / BITS_PER_LONG));
		h->nr_frees++;
	}
}

static inline ctlr_info_t *get_host(struct gendisk *disk)
{
	return disk->queue->queuedata;
}

static inline drive_info_struct *get_drv(struct gendisk *disk)
{
	return disk->private_data;
}

/*
 * Open.  Make sure the device is really there.
 */
static int cciss_open(struct inode *inode, struct file *filep)
{
	ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
	drive_info_struct *drv = get_drv(inode->i_bdev->bd_disk);

#ifdef CCISS_DEBUG
	printk(KERN_DEBUG "cciss_open %s\n", inode->i_bdev->bd_disk->disk_name);
#endif				/* CCISS_DEBUG */

	if (host->busy_initializing || drv->busy_configuring)
		return -EBUSY;
	/*
	 * Root is allowed to open raw volume zero even if it's not configured
	 * so array config can still work. Root is also allowed to open any
	 * volume that has a LUN ID, so it can issue IOCTL to reread the
	 * disk information.  I don't think I really like this
	 * but I'm already using way to many device nodes to claim another one
	 * for "raw controller".
	 */
	if (drv->nr_blocks == 0) {
		if (iminor(inode) != 0) {	/* not node 0? */
			/* if not node 0 make sure it is a partition = 0 */
			if (iminor(inode) & 0x0f) {
				return -ENXIO;
				/* if it is, make sure we have a LUN ID */
			} else if (drv->LunID == 0) {
				return -ENXIO;
			}
		}
		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;
	}
	drv->usage_count++;
	host->usage_count++;
	return 0;
}

/*
 * Close.  Sync first.
 */
static int cciss_release(struct inode *inode, struct file *filep)
{
	ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
	drive_info_struct *drv = get_drv(inode->i_bdev->bd_disk);

#ifdef CCISS_DEBUG
	printk(KERN_DEBUG "cciss_release %s\n",
	       inode->i_bdev->bd_disk->disk_name);
#endif				/* CCISS_DEBUG */

	drv->usage_count--;
	host->usage_count--;
	return 0;
}

#ifdef CONFIG_COMPAT

static int do_ioctl(struct file *f, unsigned cmd, unsigned long arg)
{
	int ret;
	lock_kernel();
	ret = cciss_ioctl(f->f_dentry->d_inode, f, cmd, arg);
	unlock_kernel();
	return ret;
}

static int cciss_ioctl32_passthru(struct file *f, unsigned cmd,
				  unsigned long arg);
static int cciss_ioctl32_big_passthru(struct file *f, unsigned cmd,
				      unsigned long arg);

static long cciss_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg)
{
	switch (cmd) {
	case CCISS_GETPCIINFO:
	case CCISS_GETINTINFO:
	case CCISS_SETINTINFO:
	case CCISS_GETNODENAME:
	case CCISS_SETNODENAME:
	case CCISS_GETHEARTBEAT:
	case CCISS_GETBUSTYPES:
	case CCISS_GETFIRMVER:
	case CCISS_GETDRIVVER:
	case CCISS_REVALIDVOLS:
	case CCISS_DEREGDISK:
	case CCISS_REGNEWDISK:
	case CCISS_REGNEWD:
	case CCISS_RESCANDISK:
	case CCISS_GETLUNINFO:
		return do_ioctl(f, cmd, arg);

	case CCISS_PASSTHRU32:
		return cciss_ioctl32_passthru(f, cmd, arg);
	case CCISS_BIG_PASSTHRU32:
		return cciss_ioctl32_big_passthru(f, cmd, arg);

	default:
		return -ENOIOCTLCMD;
	}
}

static int cciss_ioctl32_passthru(struct file *f, unsigned cmd,
				  unsigned long arg)
{
	IOCTL32_Command_struct __user *arg32 =
	    (IOCTL32_Command_struct __user *) arg;
	IOCTL_Command_struct arg64;
	IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
	int err;
	u32 cp;

	err = 0;
	err |=
	    copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
			   sizeof(arg64.LUN_info));
	err |=
	    copy_from_user(&arg64.Request, &arg32->Request,
			   sizeof(arg64.Request));
	err |=
	    copy_from_user(&arg64.error_info, &arg32->error_info,
			   sizeof(arg64.error_info));
	err |= get_user(arg64.buf_size, &arg32->buf_size);
	err |= get_user(cp, &arg32->buf);
	arg64.buf = compat_ptr(cp);
	err |= copy_to_user(p, &arg64, sizeof(arg64));

	if (err)
		return -EFAULT;

	err = do_ioctl(f, CCISS_PASSTHRU, (unsigned long)p);
	if (err)
		return err;
	err |=
	    copy_in_user(&arg32->error_info, &p->error_info,
			 sizeof(arg32->error_info));
	if (err)
		return -EFAULT;
	return err;
}

static int cciss_ioctl32_big_passthru(struct file *file, unsigned cmd,
				      unsigned long arg)
{
	BIG_IOCTL32_Command_struct __user *arg32 =
	    (BIG_IOCTL32_Command_struct __user *) arg;
	BIG_IOCTL_Command_struct arg64;
	BIG_IOCTL_Command_struct __user *p =
	    compat_alloc_user_space(sizeof(arg64));
	int err;
	u32 cp;

	err = 0;
	err |=
	    copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
			   sizeof(arg64.LUN_info));
	err |=
	    copy_from_user(&arg64.Request, &arg32->Request,
			   sizeof(arg64.Request));
	err |=
	    copy_from_user(&arg64.error_info, &arg32->error_info,
			   sizeof(arg64.error_info));
	err |= get_user(arg64.buf_size, &arg32->buf_size);
	err |= get_user(arg64.malloc_size, &arg32->malloc_size);
	err |= get_user(cp, &arg32->buf);
	arg64.buf = compat_ptr(cp);
	err |= copy_to_user(p, &arg64, sizeof(arg64));

	if (err)
		return -EFAULT;

	err = do_ioctl(file, CCISS_BIG_PASSTHRU, (unsigned long)p);
	if (err)
		return err;
	err |=
	    copy_in_user(&arg32->error_info, &p->error_info,
			 sizeof(arg32->error_info));
	if (err)
		return -EFAULT;
	return err;
}
#endif

static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
{
	drive_info_struct *drv = get_drv(bdev->bd_disk);

	if (!drv->cylinders)
		return -ENXIO;

	geo->heads = drv->heads;
	geo->sectors = drv->sectors;
	geo->cylinders = drv->cylinders;
	return 0;
}

/*
 * ioctl
 */
static int cciss_ioctl(struct inode *inode, struct file *filep,
		       unsigned int cmd, unsigned long arg)
{
	struct block_device *bdev = inode->i_bdev;
	struct gendisk *disk = bdev->bd_disk;
	ctlr_info_t *host = get_host(disk);
	drive_info_struct *drv = get_drv(disk);
	int ctlr = host->ctlr;
	void __user *argp = (void __user *)arg;

#ifdef CCISS_DEBUG
	printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
#endif				/* CCISS_DEBUG */

	switch (cmd) {
	case CCISS_GETPCIINFO:
		{
			cciss_pci_info_struct pciinfo;

			if (!arg)
				return -EINVAL;
			pciinfo.domain = pci_domain_nr(host->pdev->bus);
			pciinfo.bus = host->pdev->bus->number;
			pciinfo.dev_fn = host->pdev->devfn;
			pciinfo.board_id = host->board_id;
			if (copy_to_user
			    (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
				return -EFAULT;
			return 0;
		}
	case CCISS_GETINTINFO:
		{
			cciss_coalint_struct intinfo;
			if (!arg)
				return -EINVAL;
			intinfo.delay =
			    readl(&host->cfgtable->HostWrite.CoalIntDelay);
			intinfo.count =
			    readl(&host->cfgtable->HostWrite.CoalIntCount);
			if (copy_to_user
			    (argp, &intinfo, sizeof(cciss_coalint_struct)))
				return -EFAULT;
			return 0;
		}
	case CCISS_SETINTINFO:
		{
			cciss_coalint_struct intinfo;
			unsigned long flags;
			int i;

			if (!arg)
				return -EINVAL;
			if (!capable(CAP_SYS_ADMIN))
				return -EPERM;
			if (copy_from_user
			    (&intinfo, argp, sizeof(cciss_coalint_struct)))
				return -EFAULT;
			if ((intinfo.delay == 0) && (intinfo.count == 0))
			{
//                      printk("cciss_ioctl: delay and count cannot be 0\n");
				return -EINVAL;
			}
			spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
			/* Update the field, and then ring the doorbell */
			writel(intinfo.delay,
			       &(host->cfgtable->HostWrite.CoalIntDelay));
			writel(intinfo.count,
			       &(host->cfgtable->HostWrite.CoalIntCount));
			writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);

			for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
				if (!(readl(host->vaddr + SA5_DOORBELL)
				      & CFGTBL_ChangeReq))
					break;
				/* delay and try again */
				udelay(1000);
			}
			spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
			if (i >= MAX_IOCTL_CONFIG_WAIT)
				return -EAGAIN;
			return 0;
		}
	case CCISS_GETNODENAME:
		{
			NodeName_type NodeName;
			int i;

			if (!arg)
				return -EINVAL;
			for (i = 0; i < 16; i++)
				NodeName[i] =
				    readb(&host->cfgtable->ServerName[i]);
			if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
				return -EFAULT;
			return 0;
		}
	case CCISS_SETNODENAME:
		{
			NodeName_type NodeName;
			unsigned long flags;
			int i;

			if (!arg)
				return -EINVAL;
			if (!capable(CAP_SYS_ADMIN))
				return -EPERM;

			if (copy_from_user
			    (NodeName, argp, sizeof(NodeName_type)))
				return -EFAULT;

			spin_lock_irqsave(CCISS_LOCK(ctlr), flags);

			/* Update the field, and then ring the doorbell */
			for (i = 0; i < 16; i++)
				writeb(NodeName[i],
				       &host->cfgtable->ServerName[i]);

			writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);

			for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
				if (!(readl(host->vaddr + SA5_DOORBELL)
				      & CFGTBL_ChangeReq))
					break;
				/* delay and try again */
				udelay(1000);
			}
			spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
			if (i >= MAX_IOCTL_CONFIG_WAIT)
				return -EAGAIN;
			return 0;
		}

	case CCISS_GETHEARTBEAT:
		{
			Heartbeat_type heartbeat;

			if (!arg)
				return -EINVAL;
			heartbeat = readl(&host->cfgtable->HeartBeat);
			if (copy_to_user
			    (argp, &heartbeat, sizeof(Heartbeat_type)))
				return -EFAULT;
			return 0;
		}
	case CCISS_GETBUSTYPES:
		{
			BusTypes_type BusTypes;

			if (!arg)
				return -EINVAL;
			BusTypes = readl(&host->cfgtable->BusTypes);
			if (copy_to_user
			    (argp, &BusTypes, sizeof(BusTypes_type)))
				return -EFAULT;
			return 0;
		}
	case CCISS_GETFIRMVER:
		{
			FirmwareVer_type firmware;

			if (!arg)
				return -EINVAL;
			memcpy(firmware, host->firm_ver, 4);

			if (copy_to_user
			    (argp, firmware, sizeof(FirmwareVer_type)))
				return -EFAULT;
			return 0;
		}
	case CCISS_GETDRIVVER:
		{
			DriverVer_type DriverVer = DRIVER_VERSION;

			if (!arg)
				return -EINVAL;

			if (copy_to_user
			    (argp, &DriverVer, sizeof(DriverVer_type)))
				return -EFAULT;
			return 0;
		}

	case CCISS_REVALIDVOLS:
		if (bdev != bdev->bd_contains || drv != host->drv)
			return -ENXIO;
		return revalidate_allvol(host);

	case CCISS_GETLUNINFO:{
			LogvolInfo_struct luninfo;

			luninfo.LunID = drv->LunID;
			luninfo.num_opens = drv->usage_count;
			luninfo.num_parts = 0;
			if (copy_to_user(argp, &luninfo,
					 sizeof(LogvolInfo_struct)))
				return -EFAULT;
			return 0;
		}
	case CCISS_DEREGDISK:
		return rebuild_lun_table(host, disk);

	case CCISS_REGNEWD:
		return rebuild_lun_table(host, NULL);

	case CCISS_PASSTHRU:
		{
			IOCTL_Command_struct iocommand;
			CommandList_struct *c;
			char *buff = NULL;
			u64bit temp64;
			unsigned long flags;
			DECLARE_COMPLETION_ONSTACK(wait);

			if (!arg)
				return -EINVAL;

			if (!capable(CAP_SYS_RAWIO))
				return -EPERM;

			if (copy_from_user
			    (&iocommand, argp, sizeof(IOCTL_Command_struct)))
				return -EFAULT;
			if ((iocommand.buf_size < 1) &&
			    (iocommand.Request.Type.Direction != XFER_NONE)) {
				return -EINVAL;
			}
#if 0				/* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
			/* Check kmalloc limits */
			if (iocommand.buf_size > 128000)
				return -EINVAL;
#endif
			if (iocommand.buf_size > 0) {
				buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
				if (buff == NULL)
					return -EFAULT;
			}
			if (iocommand.Request.Type.Direction == XFER_WRITE) {
				/* Copy the data into the buffer we created */
				if (copy_from_user
				    (buff, iocommand.buf, iocommand.buf_size)) {
					kfree(buff);
					return -EFAULT;
				}
			} else {
				memset(buff, 0, iocommand.buf_size);
			}
			if ((c = cmd_alloc(host, 0)) == NULL) {
				kfree(buff);
				return -ENOMEM;
			}
			// Fill in the command type
			c->cmd_type = CMD_IOCTL_PEND;
			// Fill in Command Header
			c->Header.ReplyQueue = 0;	// unused in simple mode
			if (iocommand.buf_size > 0)	// buffer to fill
			{
				c->Header.SGList = 1;
				c->Header.SGTotal = 1;
			} else	// no buffers to fill
			{
				c->Header.SGList = 0;
				c->Header.SGTotal = 0;
			}
			c->Header.LUN = iocommand.LUN_info;
			c->Header.Tag.lower = c->busaddr;	// use the kernel address the cmd block for tag

			// Fill in Request block
			c->Request = iocommand.Request;

			// Fill in the scatter gather information
			if (iocommand.buf_size > 0) {
				temp64.val = pci_map_single(host->pdev, buff,
					iocommand.buf_size,
					PCI_DMA_BIDIRECTIONAL);
				c->SG[0].Addr.lower = temp64.val32.lower;
				c->SG[0].Addr.upper = temp64.val32.upper;
				c->SG[0].Len = iocommand.buf_size;
				c->SG[0].Ext = 0;	// we are not chaining
			}
			c->waiting = &wait;

			/* Put the request on the tail of the request queue */
			spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
			addQ(&host->reqQ, c);
			host->Qdepth++;
			start_io(host);
			spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);

			wait_for_completion(&wait);

			/* unlock the buffers from DMA */
			temp64.val32.lower = c->SG[0].Addr.lower;
			temp64.val32.upper = c->SG[0].Addr.upper;
			pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
					 iocommand.buf_size,
					 PCI_DMA_BIDIRECTIONAL);

			/* Copy the error information out */
			iocommand.error_info = *(c->err_info);
			if (copy_to_user
			    (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
				kfree(buff);
				cmd_free(host, c, 0);
				return -EFAULT;
			}

			if (iocommand.Request.Type.Direction == XFER_READ) {
				/* Copy the data out of the buffer we created */
				if (copy_to_user
				    (iocommand.buf, buff, iocommand.buf_size)) {
					kfree(buff);
					cmd_free(host, c, 0);
					return -EFAULT;
				}
			}
			kfree(buff);
			cmd_free(host, c, 0);
			return 0;
		}
	case CCISS_BIG_PASSTHRU:{
			BIG_IOCTL_Command_struct *ioc;
			CommandList_struct *c;
			unsigned char **buff = NULL;
			int *buff_size = NULL;
			u64bit temp64;
			unsigned long flags;
			BYTE sg_used = 0;
			int status = 0;
			int i;
			DECLARE_COMPLETION_ONSTACK(wait);
			__u32 left;
			__u32 sz;
			BYTE __user *data_ptr;

			if (!arg)
				return -EINVAL;
			if (!capable(CAP_SYS_RAWIO))
				return -EPERM;
			ioc = (BIG_IOCTL_Command_struct *)
			    kmalloc(sizeof(*ioc), GFP_KERNEL);
			if (!ioc) {
				status = -ENOMEM;
				goto cleanup1;
			}
			if (copy_from_user(ioc, argp, sizeof(*ioc))) {
				status = -EFAULT;
				goto cleanup1;
			}
			if ((ioc->buf_size < 1) &&
			    (ioc->Request.Type.Direction != XFER_NONE)) {
				status = -EINVAL;
				goto cleanup1;
			}
			/* Check kmalloc limits  using all SGs */
			if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
				status = -EINVAL;
				goto cleanup1;
			}
			if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
				status = -EINVAL;
				goto cleanup1;
			}
			buff =
			    kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
			if (!buff) {
				status = -ENOMEM;
				goto cleanup1;
			}
			buff_size = (int *)kmalloc(MAXSGENTRIES * sizeof(int),
						   GFP_KERNEL);
			if (!buff_size) {
				status = -ENOMEM;
				goto cleanup1;
			}
			left = ioc->buf_size;
			data_ptr = ioc->buf;
			while (left) {
				sz = (left >
				      ioc->malloc_size) ? ioc->
				    malloc_size : left;
				buff_size[sg_used] = sz;
				buff[sg_used] = kmalloc(sz, GFP_KERNEL);
				if (buff[sg_used] == NULL) {
					status = -ENOMEM;
					goto cleanup1;
				}
				if (ioc->Request.Type.Direction == XFER_WRITE) {
					if (copy_from_user
					    (buff[sg_used], data_ptr, sz)) {
						status = -ENOMEM;
						goto cleanup1;
					}
				} else {
					memset(buff[sg_used], 0, sz);
				}
				left -= sz;
				data_ptr += sz;
				sg_used++;
			}
			if ((c = cmd_alloc(host, 0)) == NULL) {
				status = -ENOMEM;
				goto cleanup1;
			}
			c->cmd_type = CMD_IOCTL_PEND;
			c->Header.ReplyQueue = 0;

			if (ioc->buf_size > 0) {
				c->Header.SGList = sg_used;
				c->Header.SGTotal = sg_used;
			} else {
				c->Header.SGList = 0;
				c->Header.SGTotal = 0;
			}
			c->Header.LUN = ioc->LUN_info;
			c->Header.Tag.lower = c->busaddr;

			c->Request = ioc->Request;
			if (ioc->buf_size > 0) {
				int i;
				for (i = 0; i < sg_used; i++) {
					temp64.val =
					    pci_map_single(host->pdev, buff[i],
						    buff_size[i],
						    PCI_DMA_BIDIRECTIONAL);
					c->SG[i].Addr.lower =
					    temp64.val32.lower;
					c->SG[i].Addr.upper =
					    temp64.val32.upper;
					c->SG[i].Len = buff_size[i];
					c->SG[i].Ext = 0;	/* we are not chaining */
				}
			}
			c->waiting = &wait;
			/* Put the request on the tail of the request queue */
			spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
			addQ(&host->reqQ, c);
			host->Qdepth++;
			start_io(host);
			spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
			wait_for_completion(&wait);
			/* unlock the buffers from DMA */
			for (i = 0; i < sg_used; i++) {
				temp64.val32.lower = c->SG[i].Addr.lower;
				temp64.val32.upper = c->SG[i].Addr.upper;
				pci_unmap_single(host->pdev,
					(dma_addr_t) temp64.val, buff_size[i],
					PCI_DMA_BIDIRECTIONAL);
			}
			/* Copy the error information out */
			ioc->error_info = *(c->err_info);
			if (copy_to_user(argp, ioc, sizeof(*ioc))) {
				cmd_free(host, c, 0);
				status = -EFAULT;
				goto cleanup1;
			}
			if (ioc->Request.Type.Direction == XFER_READ) {
				/* Copy the data out of the buffer we created */
				BYTE __user *ptr = ioc->buf;
				for (i = 0; i < sg_used; i++) {
					if (copy_to_user
					    (ptr, buff[i], buff_size[i])) {
						cmd_free(host, c, 0);
						status = -EFAULT;
						goto cleanup1;
					}
					ptr += buff_size[i];
				}
			}
			cmd_free(host, c, 0);
			status = 0;
		      cleanup1:
			if (buff) {
				for (i = 0; i < sg_used; i++)
					kfree(buff[i]);
				kfree(buff);
			}
			kfree(buff_size);
			kfree(ioc);
			return status;
		}
	default:
		return -ENOTTY;
	}
}

/*
 * revalidate_allvol is for online array config utilities.  After a
 * utility reconfigures the drives in the array, it can use this function
 * (through an ioctl) to make the driver zap any previous disk structs for
 * that controller and get new ones.
 *
 * Right now I'm using the getgeometry() function to do this, but this
 * function should probably be finer grained and allow you to revalidate one
 * particular logical volume (instead of all of them on a particular
 * controller).
 */
static int revalidate_allvol(ctlr_info_t *host)
{
	int ctlr = host->ctlr, i;
	unsigned long flags;

	spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
	if (host->usage_count > 1) {
		spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
		printk(KERN_WARNING "cciss: Device busy for volume"
		       " revalidation (usage=%d)\n", host->usage_count);
		return -EBUSY;
	}
	host->usage_count++;
	spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);

	for (i = 0; i < NWD; i++) {
		struct gendisk *disk = host->gendisk[i];
		if (disk) {
			request_queue_t *q = disk->queue;

			if (disk->flags & GENHD_FL_UP)
				del_gendisk(disk);
			if (q)
				blk_cleanup_queue(q);
		}
	}

	/*
	 * Set the partition and block size structures for all volumes
	 * on this controller to zero.  We will reread all of this data
	 */
	memset(host->drv, 0, sizeof(drive_info_struct)
	       * CISS_MAX_LUN);
	/*
	 * Tell the array controller not to give us any interrupts while
	 * we check the new geometry.  Then turn interrupts back on when
	 * we're done.
	 */
	host->access.set_intr_mask(host, CCISS_INTR_OFF);
	cciss_getgeometry(ctlr);
	host->access.set_intr_mask(host, CCISS_INTR_ON);

	/* Loop through each real device */
	for (i = 0; i < NWD; i++) {
		struct gendisk *disk = host->gendisk[i];
		drive_info_struct *drv = &(host->drv[i]);
		/* we must register the controller even if no disks exist */
		/* this is for the online array utilities */
		if (!drv->heads && i)
			continue;
		blk_queue_hardsect_size(drv->queue, drv->block_size);
		set_capacity(disk, drv->nr_blocks);
		add_disk(disk);
	}
	host->usage_count--;
	return 0;
}

static inline void complete_buffers(struct bio *bio, int status)
{
	while (bio) {
		struct bio *xbh = bio->bi_next;
		int nr_sectors = bio_sectors(bio);

		bio->bi_next = NULL;
		bio_endio(bio, nr_sectors << 9, status ? 0 : -EIO);
		bio = xbh;
	}
}

static void cciss_check_queues(ctlr_info_t *h)
{
	int start_queue = h->next_to_run;
	int i;

	/* check to see if we have maxed out the number of commands that can
	 * be placed on the queue.  If so then exit.  We do this check here
	 * in case the interrupt we serviced was from an ioctl and did not
	 * free any new commands.
	 */
	if ((find_first_zero_bit(h->cmd_pool_bits, NR_CMDS)) == NR_CMDS)
		return;

	/* We have room on the queue for more commands.  Now we need to queue
	 * them up.  We will also keep track of the next queue to run so
	 * that every queue gets a chance to be started first.
	 */
	for (i = 0; i < h->highest_lun + 1; i++) {
		int curr_queue = (start_queue + i) % (h->highest_lun + 1);
		/* make sure the disk has been added and the drive is real
		 * because this can be called from the middle of init_one.
		 */
		if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
			continue;
		blk_start_queue(h->gendisk[curr_queue]->queue);

		/* check to see if we have maxed out the number of commands
		 * that can be placed on the queue.
		 */
		if ((find_first_zero_bit(h->cmd_pool_bits, NR_CMDS)) == NR_CMDS) {
			if (curr_queue == start_queue) {
				h->next_to_run =
				    (start_queue + 1) % (h->highest_lun + 1);
				break;
			} else {
				h->next_to_run = curr_queue;
				break;
			}
		} else {
			curr_queue = (curr_queue + 1) % (h->highest_lun + 1);
		}
	}
}

static void cciss_softirq_done(struct request *rq)
{
	CommandList_struct *cmd = rq->completion_data;
	ctlr_info_t *h = hba[cmd->ctlr];
	unsigned long flags;
	u64bit temp64;
	int i, ddir;

	if (cmd->Request.Type.Direction == XFER_READ)
		ddir = PCI_DMA_FROMDEVICE;
	else
		ddir = PCI_DMA_TODEVICE;

	/* command did not need to be retried */
	/* unmap the DMA mapping for all the scatter gather elements */
	for (i = 0; i < cmd->Header.SGList; i++) {
		temp64.val32.lower = cmd->SG[i].Addr.lower;
		temp64.val32.upper = cmd->SG[i].Addr.upper;
		pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
	}

	complete_buffers(rq->bio, rq->errors);

#ifdef CCISS_DEBUG
	printk("Done with %p\n", rq);
#endif				/* CCISS_DEBUG */

	add_disk_randomness(rq->rq_disk);
	spin_lock_irqsave(&h->lock, flags);
	end_that_request_last(rq, rq->errors);
	cmd_free(h, cmd, 1);
	cciss_check_queues(h);
	spin_unlock_irqrestore(&h->lock, flags);
}

/* This function will check the usage_count of the drive to be updated/added.
 * If the usage_count is zero then the drive information will be updated and
 * the disk will be re-registered with the kernel.  If not then it will be
 * left alone for the next reboot.  The exception to this is disk 0 which
 * will always be left registered with the kernel since it is also the
 * controller node.  Any changes to disk 0 will show up on the next
 * reboot.
 */
static void cciss_update_drive_info(int ctlr, int drv_index)
{
	ctlr_info_t *h = hba[ctlr];
	struct gendisk *disk;
	InquiryData_struct *inq_buff = NULL;
	unsigned int block_size;
	sector_t total_size;
	unsigned long flags = 0;
	int ret = 0;

	/* if the disk already exists then deregister it before proceeding */
	if (h->drv[drv_index].raid_level != -1) {
		spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
		h->drv[drv_index].busy_configuring = 1;
		spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
		ret = deregister_disk(h->gendisk[drv_index],
				      &h->drv[drv_index], 0);
		h->drv[drv_index].busy_configuring = 0;
	}

	/* If the disk is in use return */
	if (ret)
		return;

	/* Get information about the disk and modify the driver structure */
	inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
	if (inq_buff == NULL)
		goto mem_msg;

	cciss_read_capacity(ctlr, drv_index, 1,
			    &total_size, &block_size);

	/* total size = last LBA + 1 */
	/* FFFFFFFF + 1 = 0, cannot have a logical volume of size 0 */
	/* so we assume this volume this must be >2TB in size */
	if (total_size == (__u32) 0) {
		cciss_read_capacity_16(ctlr, drv_index, 1,
		&total_size, &block_size);
		h->cciss_read = CCISS_READ_16;
		h->cciss_write = CCISS_WRITE_16;
	} else {
		h->cciss_read = CCISS_READ_10;
		h->cciss_write = CCISS_WRITE_10;
	}
	cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
			       inq_buff, &h->drv[drv_index]);

	++h->num_luns;
	disk = h->gendisk[drv_index];
	set_capacity(disk, h->drv[drv_index].nr_blocks);

	/* if it's the controller it's already added */
	if (drv_index) {
		disk->queue = blk_init_queue(do_cciss_request, &h->lock);

		/* Set up queue information */
		disk->queue->backing_dev_info.ra_pages = READ_AHEAD;
		blk_queue_bounce_limit(disk->queue, hba[ctlr]->pdev->dma_mask);

		/* This is a hardware imposed limit. */
		blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);

		/* This is a limit in the driver and could be eliminated. */
		blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);

		blk_queue_max_sectors(disk->queue, 512);

		blk_queue_softirq_done(disk->queue, cciss_softirq_done);

		disk->queue->queuedata = hba[ctlr];

		blk_queue_hardsect_size(disk->queue,
					hba[ctlr]->drv[drv_index].block_size);

		h->drv[drv_index].queue = disk->queue;
		add_disk(disk);
	}

      freeret:
	kfree(inq_buff);
	return;
      mem_msg:
	printk(KERN_ERR "cciss: out of memory\n");
	goto freeret;
}

/* This function will find the first index of the controllers drive array
 * that has a -1 for the raid_level and will return that index.  This is
 * where new drives will be added.  If the index to be returned is greater
 * than the highest_lun index for the controller then highest_lun is set
 * to this new index.  If there are no available indexes then -1 is returned.
 */
static int cciss_find_free_drive_index(int ctlr)
{
	int i;

	for (i = 0; i < CISS_MAX_LUN; i++) {
		if (hba[ctlr]->drv[i].raid_level == -1) {
			if (i > hba[ctlr]->highest_lun)
				hba[ctlr]->highest_lun = i;
			return i;
		}
	}
	return -1;
}

/* This function will add and remove logical drives from the Logical
 * drive array of the controller and maintain persistency of ordering
 * so that mount points are preserved until the next reboot.  This allows
 * for the removal of logical drives in the middle of the drive array
 * without a re-ordering of those drives.
 * INPUT
 * h		= The controller to perform the operations on
 * del_disk	= The disk to remove if specified.  If the value given
 *		  is NULL then no disk is removed.
 */
static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk)
{
	int ctlr = h->ctlr;
	int num_luns;
	ReportLunData_struct *ld_buff = NULL;
	drive_info_struct *drv = NULL;
	int return_code;
	int listlength = 0;
	int i;
	int drv_found;
	int drv_index = 0;
	__u32 lunid = 0;
	unsigned long flags;

	/* Set busy_configuring flag for this operation */
	spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
	if (h->num_luns >= CISS_MAX_LUN) {
		spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
		return -EINVAL;
	}

	if (h->busy_configuring) {
		spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
		return -EBUSY;
	}
	h->busy_configuring = 1;

	/* if del_disk is NULL then we are being called to add a new disk
	 * and update the logical drive table.  If it is not NULL then
	 * we will check if the disk is in use or not.
	 */
	if (del_disk != NULL) {
		drv = get_drv(del_disk);
		drv->busy_configuring = 1;
		spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
		return_code = deregister_disk(del_disk, drv, 1);
		drv->busy_configuring = 0;
		h->busy_configuring = 0;
		return return_code;
	} else {
		spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
		if (!capable(CAP_SYS_RAWIO))
			return -EPERM;

		ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
		if (ld_buff == NULL)
			goto mem_msg;

		return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
					      sizeof(ReportLunData_struct), 0,
					      0, 0, TYPE_CMD);

		if (return_code == IO_OK) {
			listlength |=
			    (0xff & (unsigned int)(ld_buff->LUNListLength[0]))
			    << 24;
			listlength |=
			    (0xff & (unsigned int)(ld_buff->LUNListLength[1]))
			    << 16;
			listlength |=
			    (0xff & (unsigned int)(ld_buff->LUNListLength[2]))
			    << 8;
			listlength |=
			    0xff & (unsigned int)(ld_buff->LUNListLength[3]);
		} else {	/* reading number of logical volumes failed */
			printk(KERN_WARNING "cciss: report logical volume"
			       " command failed\n");
			listlength = 0;
			goto freeret;
		}

		num_luns = listlength / 8;	/* 8 bytes per entry */
		if (num_luns > CISS_MAX_LUN) {
			num_luns = CISS_MAX_LUN;
			printk(KERN_WARNING "cciss: more luns configured"
			       " on controller than can be handled by"
			       " this driver.\n");
		}

		/* Compare controller drive array to drivers drive array.
		 * Check for updates in the drive information and any new drives
		 * on the controller.
		 */
		for (i = 0; i < num_luns; i++) {
			int j;

			drv_found = 0;

			lunid = (0xff &
				 (unsigned int)(ld_buff->LUN[i][3])) << 24;
			lunid |= (0xff &
				  (unsigned int)(ld_buff->LUN[i][2])) << 16;
			lunid |= (0xff &
				  (unsigned int)(ld_buff->LUN[i][1])) << 8;
			lunid |= 0xff & (unsigned int)(ld_buff->LUN[i][0]);

			/* Find if the LUN is already in the drive array
			 * of the controller.  If so then update its info
			 * if not is use.  If it does not exist then find
			 * the first free index and add it.
			 */
			for (j = 0; j <= h->highest_lun; j++) {
				if (h->drv[j].LunID == lunid) {
					drv_index = j;
					drv_found = 1;
				}
			}

			/* check if the drive was found already in the array */
			if (!drv_found) {
				drv_index = cciss_find_free_drive_index(ctlr);
				if (drv_index == -1)
					goto freeret;

			}
			h->drv[drv_index].LunID = lunid;
			cciss_update_drive_info(ctlr, drv_index);
		}		/* end for */
	}			/* end else */

      freeret:
	kfree(ld_buff);
	h->busy_configuring = 0;
	/* We return -1 here to tell the ACU that we have registered/updated
	 * all of the drives that we can and to keep it from calling us
	 * additional times.
	 */
	return -1;
      mem_msg:
	printk(KERN_ERR "cciss: out of memory\n");
	goto freeret;
}

/* This function will deregister the disk and it's queue from the
 * kernel.  It must be called with the controller lock held and the
 * drv structures busy_configuring flag set.  It's parameters are:
 *
 * disk = This is the disk to be deregistered
 * drv  = This is the drive_info_struct associated with the disk to be
 *        deregistered.  It contains information about the disk used
 *        by the driver.
 * clear_all = This flag determines whether or not the disk information
 *             is going to be completely cleared out and the highest_lun
 *             reset.  Sometimes we want to clear out information about
 *             the disk in preparation for re-adding it.  In this case
 *             the highest_lun should be left unchanged and the LunID
 *             should not be cleared.
*/
static int deregister_disk(struct gendisk *disk, drive_info_struct *drv,
			   int clear_all)
{
	ctlr_info_t *h = get_host(disk);

	if (!capable(CAP_SYS_RAWIO))
		return -EPERM;

	/* make sure logical volume is NOT is use */
	if (clear_all || (h->gendisk[0] == disk)) {
		if (drv->usage_count > 1)
			return -EBUSY;
	} else if (drv->usage_count > 0)
		return -EBUSY;

	/* invalidate the devices and deregister the disk.  If it is disk
	 * zero do not deregister it but just zero out it's values.  This
	 * allows us to delete disk zero but keep the controller registered.
	 */
	if (h->gendisk[0] != disk) {
		if (disk) {
			request_queue_t *q = disk->queue;
			if (disk->flags & GENHD_FL_UP)
				del_gendisk(disk);
			if (q) {
				blk_cleanup_queue(q);
				drv->queue = NULL;
			}
		}
	}

	--h->num_luns;
	/* zero out the disk size info */
	drv->nr_blocks = 0;
	drv->block_size = 0;
	drv->heads = 0;
	drv->sectors = 0;
	drv->cylinders = 0;
	drv->raid_level = -1;	/* This can be used as a flag variable to
				 * indicate that this element of the drive
				 * array is free.
				 */

	if (clear_all) {
		/* check to see if it was the last disk */
		if (drv == h->drv + h->highest_lun) {
			/* if so, find the new hightest lun */
			int i, newhighest = -1;
			for (i = 0; i < h->highest_lun; i++) {
				/* if the disk has size > 0, it is available */
				if (h->drv[i].heads)
					newhighest = i;
			}
			h->highest_lun = newhighest;
		}

		drv->LunID = 0;
	}
	return 0;
}

static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff, size_t size, unsigned int use_unit_num,	/* 0: address the controller,
															   1: address logical volume log_unit,
															   2: periph device address is scsi3addr */
		    unsigned int log_unit, __u8 page_code,
		    unsigned char *scsi3addr, int cmd_type)
{
	ctlr_info_t *h = hba[ctlr];
	u64bit buff_dma_handle;
	int status = IO_OK;

	c->cmd_type = CMD_IOCTL_PEND;
	c->Header.ReplyQueue = 0;
	if (buff != NULL) {
		c->Header.SGList = 1;
		c->Header.SGTotal = 1;
	} else {
		c->Header.SGList = 0;
		c->Header.SGTotal = 0;
	}
	c->Header.Tag.lower = c->busaddr;

	c->Request.Type.Type = cmd_type;
	if (cmd_type == TYPE_CMD) {
		switch (cmd) {
		case CISS_INQUIRY:
			/* If the logical unit number is 0 then, this is going
			   to controller so It's a physical command
			   mode = 0 target = 0.  So we have nothing to write.
			   otherwise, if use_unit_num == 1,
			   mode = 1(volume set addressing) target = LUNID
			   otherwise, if use_unit_num == 2,
			   mode = 0(periph dev addr) target = scsi3addr */
			if (use_unit_num == 1) {
				c->Header.LUN.LogDev.VolId =
				    h->drv[log_unit].LunID;
				c->Header.LUN.LogDev.Mode = 1;
			} else if (use_unit_num == 2) {
				memcpy(c->Header.LUN.LunAddrBytes, scsi3addr,
				       8);
				c->Header.LUN.LogDev.Mode = 0;
			}
			/* are we trying to read a vital product page */
			if (page_code != 0) {
				c->Request.CDB[1] = 0x01;
				c->Request.CDB[2] = page_code;
			}
			c->Request.CDBLen = 6;
			c->Request.Type.Attribute = ATTR_SIMPLE;
			c->Request.Type.Direction = XFER_READ;
			c->Request.Timeout = 0;
			c->Request.CDB[0] = CISS_INQUIRY;
			c->Request.CDB[4] = size & 0xFF;
			break;
		case CISS_REPORT_LOG:
		case CISS_REPORT_PHYS:
			/* Talking to controller so It's a physical command
			   mode = 00 target = 0.  Nothing to write.
			 */
			c->Request.CDBLen = 12;
			c->Request.Type.Attribute = ATTR_SIMPLE;
			c->Request.Type.Direction = XFER_READ;
			c->Request.Timeout = 0;
			c->Request.CDB[0] = cmd;
			c->Request.CDB[6] = (size >> 24) & 0xFF;	//MSB
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0xFF;
			c->Request.CDB[9] = size & 0xFF;
			break;

		case CCISS_READ_CAPACITY:
			c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
			c->Header.LUN.LogDev.Mode = 1;
			c->Request.CDBLen = 10;
			c->Request.Type.Attribute = ATTR_SIMPLE;
			c->Request.Type.Direction = XFER_READ;
			c->Request.Timeout = 0;
			c->Request.CDB[0] = cmd;
			break;
		case CCISS_READ_CAPACITY_16:
			c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
			c->Header.LUN.LogDev.Mode = 1;
			c->Request.CDBLen = 16;
			c->Request.Type.Attribute = ATTR_SIMPLE;
			c->Request.Type.Direction = XFER_READ;
			c->Request.Timeout = 0;
			c->Request.CDB[0] = cmd;
			c->Request.CDB[1] = 0x10;
			c->Request.CDB[10] = (size >> 24) & 0xFF;
			c->Request.CDB[11] = (size >> 16) & 0xFF;
			c->Request.CDB[12] = (size >> 8) & 0xFF;
			c->Request.CDB[13] = size & 0xFF;
			c->Request.Timeout = 0;
			c->Request.CDB[0] = cmd;
			break;
		case CCISS_CACHE_FLUSH:
			c->Request.CDBLen = 12;
			c->Request.Type.Attribute = ATTR_SIMPLE;
			c->Request.Type.Direction = XFER_WRITE;
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_WRITE;
			c->Request.CDB[6] = BMIC_CACHE_FLUSH;
			break;
		default:
			printk(KERN_WARNING
			       "cciss%d:  Unknown Command 0x%c\n", ctlr, cmd);
			return IO_ERROR;
		}
	} else if (cmd_type == TYPE_MSG) {
		switch (cmd) {
		case 0:	/* ABORT message */
			c->Request.CDBLen = 12;
			c->Request.Type.Attribute = ATTR_SIMPLE;
			c->Request.Type.Direction = XFER_WRITE;
			c->Request.Timeout = 0;
			c->Request.CDB[0] = cmd;	/* abort */
			c->Request.CDB[1] = 0;	/* abort a command */
			/* buff contains the tag of the command to abort */
			memcpy(&c->Request.CDB[4], buff, 8);
			break;
		case 1:	/* RESET message */
			c->Request.CDBLen = 12;
			c->Request.Type.Attribute = ATTR_SIMPLE;
			c->Request.Type.Direction = XFER_WRITE;
			c->Request.Timeout = 0;
			memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
			c->Request.CDB[0] = cmd;	/* reset */
			c->Request.CDB[1] = 0x04;	/* reset a LUN */
			break;
		case 3:	/* No-Op message */
			c->Request.CDBLen = 1;
			c->Request.Type.Attribute = ATTR_SIMPLE;
			c->Request.Type.Direction = XFER_WRITE;
			c->Request.Timeout = 0;
			c->Request.CDB[0] = cmd;
			break;
		default:
			printk(KERN_WARNING
			       "cciss%d: unknown message type %d\n", ctlr, cmd);
			return IO_ERROR;
		}
	} else {
		printk(KERN_WARNING
		       "cciss%d: unknown command type %d\n", ctlr, cmd_type);
		return IO_ERROR;
	}
	/* Fill in the scatter gather information */
	if (size > 0) {
		buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
							     buff, size,
							     PCI_DMA_BIDIRECTIONAL);
		c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
		c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
		c->SG[0].Len = size;
		c->SG[0].Ext = 0;	/* we are not chaining */
	}
	return status;
}

static int sendcmd_withirq(__u8 cmd,
			   int ctlr,
			   void *buff,
			   size_t size,
			   unsigned int use_unit_num,
			   unsigned int log_unit, __u8 page_code, int cmd_type)
{
	ctlr_info_t *h = hba[ctlr];
	CommandList_struct *c;
	u64bit buff_dma_handle;
	unsigned long flags;
	int return_status;
	DECLARE_COMPLETION_ONSTACK(wait);

	if ((c = cmd_alloc(h, 0)) == NULL)
		return -ENOMEM;
	return_status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
				 log_unit, page_code, NULL, cmd_type);
	if (return_status != IO_OK) {
		cmd_free(h, c, 0);
		return return_status;
	}
      resend_cmd2:
	c->waiting = &wait;

	/* Put the request on the tail of the queue and send it */
	spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
	addQ(&h->reqQ, c);
	h->Qdepth++;
	start_io(h);
	spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);

	wait_for_completion(&wait);

	if (c->err_info->CommandStatus != 0) {	/* an error has occurred */
		switch (c->err_info->CommandStatus) {
		case CMD_TARGET_STATUS:
			printk(KERN_WARNING "cciss: cmd %p has "
			       " completed with errors\n", c);
			if (c->err_info->ScsiStatus) {
				printk(KERN_WARNING "cciss: cmd %p "
				       "has SCSI Status = %x\n",
				       c, c->err_info->ScsiStatus);
			}

			break;
		case CMD_DATA_UNDERRUN:
		case CMD_DATA_OVERRUN:
			/* expected for inquire and report lun commands */
			break;
		case CMD_INVALID:
			printk(KERN_WARNING "cciss: Cmd %p is "
			       "reported invalid\n", c);
			return_status = IO_ERROR;
			break;
		case CMD_PROTOCOL_ERR:
			printk(KERN_WARNING "cciss: cmd %p has "
			       "protocol error \n", c);
			return_status = IO_ERROR;
			break;
		case CMD_HARDWARE_ERR:
			printk(KERN_WARNING "cciss: cmd %p had "
			       " hardware error\n", c);
			return_status = IO_ERROR;
			break;
		case CMD_CONNECTION_LOST:
			printk(KERN_WARNING "cciss: cmd %p had "
			       "connection lost\n", c);
			return_status = IO_ERROR;
			break;
		case CMD_ABORTED:
			printk(KERN_WARNING "cciss: cmd %p was "
			       "aborted\n", c);
			return_status = IO_ERROR;
			break;
		case CMD_ABORT_FAILED:
			printk(KERN_WARNING "cciss: cmd %p reports "
			       "abort failed\n", c);
			return_status = IO_ERROR;
			break;
		case CMD_UNSOLICITED_ABORT:
			printk(KERN_WARNING
			       "cciss%d: unsolicited abort %p\n", ctlr, c);
			if (c->retry_count < MAX_CMD_RETRIES) {
				printk(KERN_WARNING
				       "cciss%d: retrying %p\n", ctlr, c);
				c->retry_count++;
				/* erase the old error information */
				memset(c->err_info, 0,
				       sizeof(ErrorInfo_struct));
				return_status = IO_OK;
				INIT_COMPLETION(wait);
				goto resend_cmd2;
			}
			return_status = IO_ERROR;
			break;
		default:
			printk(KERN_WARNING "cciss: cmd %p returned "
			       "unknown status %x\n", c,
			       c->err_info->CommandStatus);
			return_status = IO_ERROR;
		}
	}
	/* unlock the buffers from DMA */
	buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
	buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
	pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
			 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
	cmd_free(h, c, 0);
	return return_status;
}

static void cciss_geometry_inquiry(int ctlr, int logvol,
				   int withirq, sector_t total_size,
				   unsigned int block_size,
				   InquiryData_struct *inq_buff,
				   drive_info_struct *drv)
{
	int return_code;
	unsigned long t;

	memset(inq_buff, 0, sizeof(InquiryData_struct));
	if (withirq)
		return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
					      inq_buff, sizeof(*inq_buff), 1,
					      logvol, 0xC1, TYPE_CMD);
	else
		return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
				      sizeof(*inq_buff), 1, logvol, 0xC1, NULL,
				      TYPE_CMD);
	if (return_code == IO_OK) {
		if (inq_buff->data_byte[8] == 0xFF) {
			printk(KERN_WARNING
			       "cciss: reading geometry failed, volume "
			       "does not support reading geometry\n");
			drv->heads = 255;
			drv->sectors = 32;	// Sectors per track
		} else {
			drv->heads = inq_buff->data_byte[6];
			drv->sectors = inq_buff->data_byte[7];
			drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
			drv->cylinders += inq_buff->data_byte[5];
			drv->raid_level = inq_buff->data_byte[8];
		}
		drv->block_size = block_size;
		drv->nr_blocks = total_size;
		t = drv->heads * drv->sectors;
		if (t > 1) {
			unsigned rem = sector_div(total_size, t);
			if (rem)
				total_size++;
			drv->cylinders = total_size;
		}
	} else {		/* Get geometry failed */
		printk(KERN_WARNING "cciss: reading geometry failed\n");
	}
	printk(KERN_INFO "      heads=%d, sectors=%d, cylinders=%d\n\n",
	       drv->heads, drv->sectors, drv->cylinders);
}

static void
cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
		    unsigned int *block_size)
{
	ReadCapdata_struct *buf;
	int return_code;
	buf = kmalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
	if (buf == NULL) {
		printk(KERN_WARNING "cciss: out of memory\n");
		return;
	}
	memset(buf, 0, sizeof(ReadCapdata_struct));
	if (withirq)
		return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
				ctlr, buf, sizeof(ReadCapdata_struct),
					1, logvol, 0, TYPE_CMD);
	else
		return_code = sendcmd(CCISS_READ_CAPACITY,
				ctlr, buf, sizeof(ReadCapdata_struct),
					1, logvol, 0, NULL, TYPE_CMD);
	if (return_code == IO_OK) {
		*total_size = be32_to_cpu(*(__u32 *) buf->total_size)+1;
		*block_size = be32_to_cpu(*(__u32 *) buf->block_size);
	} else {		/* read capacity command failed */
		printk(KERN_WARNING "cciss: read capacity failed\n");
		*total_size = 0;
		*block_size = BLOCK_SIZE;
	}
	if (*total_size != (__u32) 0)
		printk(KERN_INFO "      blocks= %lld block_size= %d\n",
		*total_size, *block_size);
	kfree(buf);
	return;
}

static void
cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, 				unsigned int *block_size)
{
	ReadCapdata_struct_16 *buf;
	int return_code;
	buf = kmalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
	if (buf == NULL) {
		printk(KERN_WARNING "cciss: out of memory\n");
		return;
	}
	memset(buf, 0, sizeof(ReadCapdata_struct_16));
	if (withirq) {
		return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
			ctlr, buf, sizeof(ReadCapdata_struct_16),
				1, logvol, 0, TYPE_CMD);
	}
	else {
		return_code = sendcmd(CCISS_READ_CAPACITY_16,
			ctlr, buf, sizeof(ReadCapdata_struct_16),
				1, logvol, 0, NULL, TYPE_CMD);
	}
	if (return_code == IO_OK) {
		*total_size = be64_to_cpu(*(__u64 *) buf->total_size)+1;
		*block_size = be32_to_cpu(*(__u32 *) buf->block_size);
	} else {		/* read capacity command failed */
		printk(KERN_WARNING "cciss: read capacity failed\n");
		*total_size = 0;
		*block_size = BLOCK_SIZE;
	}
	printk(KERN_INFO "      blocks= %lld block_size= %d\n",
	       *total_size, *block_size);
	kfree(buf);
	return;
}

static int cciss_revalidate(struct gendisk *disk)
{
	ctlr_info_t *h = get_host(disk);
	drive_info_struct *drv = get_drv(disk);
	int logvol;
	int FOUND = 0;
	unsigned int block_size;
	sector_t total_size;
	InquiryData_struct *inq_buff = NULL;

	for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
		if (h->drv[logvol].LunID == drv->LunID) {
			FOUND = 1;
			break;
		}
	}

	if (!FOUND)
		return 1;

	inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
	if (inq_buff == NULL) {
		printk(KERN_WARNING "cciss: out of memory\n");
		return 1;
	}
	if (h->cciss_read == CCISS_READ_10) {
		cciss_read_capacity(h->ctlr, logvol, 1,
					&total_size, &block_size);
	} else {
		cciss_read_capacity_16(h->ctlr, logvol, 1,
					&total_size, &block_size);
	}
	cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
			       inq_buff, drv);

	blk_queue_hardsect_size(drv->queue, drv->block_size);
	set_capacity(disk, drv->nr_blocks);

	kfree(inq_buff);
	return 0;
}

/*
 *   Wait polling for a command to complete.
 *   The memory mapped FIFO is polled for the completion.
 *   Used only at init time, interrupts from the HBA are disabled.
 */
static unsigned long pollcomplete(int ctlr)
{
	unsigned long done;
	int i;

	/* Wait (up to 20 seconds) for a command to complete */

	for (i = 20 * HZ; i > 0; i--) {
		done = hba[ctlr]->access.command_completed(hba[ctlr]);
		if (done == FIFO_EMPTY)
			schedule_timeout_uninterruptible(1);
		else
			return done;
	}
	/* Invalid address to tell caller we ran out of time */
	return 1;
}

static int add_sendcmd_reject(__u8 cmd, int ctlr, unsigned long complete)
{
	/* We get in here if sendcmd() is polling for completions
	   and gets some command back that it wasn't expecting --
	   something other than that which it just sent down.
	   Ordinarily, that shouldn't happen, but it can happen when
	   the scsi tape stuff gets into error handling mode, and
	   starts using sendcmd() to try to abort commands and
	   reset tape drives.  In that case, sendcmd may pick up
	   completions of commands that were sent to logical drives
	   through the block i/o system, or cciss ioctls completing, etc.
	   In that case, we need to save those completions for later
	   processing by the interrupt handler.
	 */

#ifdef CONFIG_CISS_SCSI_TAPE
	struct sendcmd_reject_list *srl = &hba[ctlr]->scsi_rejects;

	/* If it's not the scsi tape stuff doing error handling, (abort */
	/* or reset) then we don't expect anything weird. */
	if (cmd != CCISS_RESET_MSG && cmd != CCISS_ABORT_MSG) {
#endif
		printk(KERN_WARNING "cciss cciss%d: SendCmd "
		       "Invalid command list address returned! (%lx)\n",
		       ctlr, complete);
		/* not much we can do. */
#ifdef CONFIG_CISS_SCSI_TAPE
		return 1;
	}

	/* We've sent down an abort or reset, but something else
	   has completed */
	if (srl->ncompletions >= (NR_CMDS + 2)) {
		/* Uh oh.  No room to save it for later... */
		printk(KERN_WARNING "cciss%d: Sendcmd: Invalid command addr, "
		       "reject list overflow, command lost!\n", ctlr);
		return 1;
	}
	/* Save it for later */
	srl->complete[srl->ncompletions] = complete;
	srl->ncompletions++;
#endif
	return 0;
}

/*
 * Send a command to the controller, and wait for it to complete.
 * Only used at init time.
 */
static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size, unsigned int use_unit_num,	/* 0: address the controller,
												   1: address logical volume log_unit,
												   2: periph device address is scsi3addr */
		   unsigned int log_unit,
		   __u8 page_code, unsigned char *scsi3addr, int cmd_type)
{
	CommandList_struct *c;
	int i;
	unsigned long complete;
	ctlr_info_t *info_p = hba[ctlr];
	u64bit buff_dma_handle;
	int status, done = 0;

	if ((c = cmd_alloc(info_p, 1)) == NULL) {
		printk(KERN_WARNING "cciss: unable to get memory");
		return IO_ERROR;
	}
	status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
			  log_unit, page_code, scsi3addr, cmd_type);
	if (status != IO_OK) {
		cmd_free(info_p, c, 1);
		return status;
	}
      resend_cmd1:
	/*
	 * Disable interrupt
	 */
#ifdef CCISS_DEBUG
	printk(KERN_DEBUG "cciss: turning intr off\n");
#endif				/* CCISS_DEBUG */
	info_p->access.set_intr_mask(info_p, CCISS_INTR_OFF);

	/* Make sure there is room in the command FIFO */
	/* Actually it should be completely empty at this time */
	/* unless we are in here doing error handling for the scsi */
	/* tape side of the driver. */
	for (i = 200000; i > 0; i--) {
		/* if fifo isn't full go */
		if (!(info_p->access.fifo_full(info_p))) {

			break;
		}
		udelay(10);
		printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
		       " waiting!\n", ctlr);
	}
	/*
	 * Send the cmd
	 */
	info_p->access.submit_command(info_p, c);
	done = 0;
	do {
		complete = pollcomplete(ctlr);

#ifdef CCISS_DEBUG
		printk(KERN_DEBUG "cciss: command completed\n");
#endif				/* CCISS_DEBUG */

		if (complete == 1) {
			printk(KERN_WARNING
			       "cciss cciss%d: SendCmd Timeout out, "
			       "No command list address returned!\n", ctlr);
			status = IO_ERROR;
			done = 1;
			break;
		}

		/* This will need to change for direct lookup completions */
		if ((complete & CISS_ERROR_BIT)
		    && (complete & ~CISS_ERROR_BIT) == c->busaddr) {
			/* if data overrun or underun on Report command
			   ignore it
			 */
			if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
			     (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
			     (c->Request.CDB[0] == CISS_INQUIRY)) &&
			    ((c->err_info->CommandStatus ==
			      CMD_DATA_OVERRUN) ||
			     (c->err_info->CommandStatus == CMD_DATA_UNDERRUN)
			    )) {
				complete = c->busaddr;
			} else {
				if (c->err_info->CommandStatus ==
				    CMD_UNSOLICITED_ABORT) {
					printk(KERN_WARNING "cciss%d: "
					       "unsolicited abort %p\n",
					       ctlr, c);
					if (c->retry_count < MAX_CMD_RETRIES) {
						printk(KERN_WARNING
						       "cciss%d: retrying %p\n",
						       ctlr, c);
						c->retry_count++;
						/* erase the old error */
						/* information */
						memset(c->err_info, 0,
						       sizeof
						       (ErrorInfo_struct));
						goto resend_cmd1;
					} else {
						printk(KERN_WARNING
						       "cciss%d: retried %p too "
						       "many times\n", ctlr, c);
						status = IO_ERROR;
						goto cleanup1;
					}
				} else if (c->err_info->CommandStatus ==
					   CMD_UNABORTABLE) {
					printk(KERN_WARNING
					       "cciss%d: command could not be aborted.\n",
					       ctlr);
					status = IO_ERROR;
					goto cleanup1;
				}
				printk(KERN_WARNING "ciss ciss%d: sendcmd"
				       " Error %x \n", ctlr,
				       c->err_info->CommandStatus);
				printk(KERN_WARNING "ciss ciss%d: sendcmd"
				       " offensive info\n"
				       "  size %x\n   num %x   value %x\n",
				       ctlr,
				       c->err_info->MoreErrInfo.Invalid_Cmd.
				       offense_size,
				       c->err_info->MoreErrInfo.Invalid_Cmd.
				       offense_num,
				       c->err_info->MoreErrInfo.Invalid_Cmd.
				       offense_value);
				status = IO_ERROR;
				goto cleanup1;
			}
		}
		/* This will need changing for direct lookup completions */
		if (complete != c->busaddr) {
			if (add_sendcmd_reject(cmd, ctlr, complete) != 0) {
				BUG();	/* we are pretty much hosed if we get here. */
			}
			continue;
		} else
			done = 1;
	} while (!done);

      cleanup1:
	/* unlock the data buffer from DMA */
	buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
	buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
	pci_unmap_single(info_p->pdev, (dma_addr_t) buff_dma_handle.val,
			 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
#ifdef CONFIG_CISS_SCSI_TAPE
	/* if we saved some commands for later, process them now. */
	if (info_p->scsi_rejects.ncompletions > 0)
		do_cciss_intr(0, info_p);
#endif
	cmd_free(info_p, c, 1);
	return status;
}

/*
 * Map (physical) PCI mem into (virtual) kernel space
 */
static void __iomem *remap_pci_mem(ulong base, ulong size)
{
	ulong page_base = ((ulong) base) & PAGE_MASK;
	ulong page_offs = ((ulong) base) - page_base;
	void __iomem *page_remapped = ioremap(page_base, page_offs + size);

	return page_remapped ? (page_remapped + page_offs) : NULL;
}

/*
 * Takes jobs of the Q and sends them to the hardware, then puts it on
 * the Q to wait for completion.
 */
static void start_io(ctlr_info_t *h)
{
	CommandList_struct *c;

	while ((c = h->reqQ) != NULL) {
		/* can't do anything if fifo is full */
		if ((h->access.fifo_full(h))) {
			printk(KERN_WARNING "cciss: fifo full\n");
			break;
		}

		/* Get the first entry from the Request Q */
		removeQ(&(h->reqQ), c);
		h->Qdepth--;

		/* Tell the controller execute command */
		h->access.submit_command(h, c);

		/* Put job onto the completed Q */
		addQ(&(h->cmpQ), c);
	}
}

/* Assumes that CCISS_LOCK(h->ctlr) is held. */
/* Zeros out the error record and then resends the command back */
/* to the controller */
static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
{
	/* erase the old error information */
	memset(c->err_info, 0, sizeof(ErrorInfo_struct));

	/* add it to software queue and then send it to the controller */
	addQ(&(h->reqQ), c);
	h->Qdepth++;
	if (h->Qdepth > h->maxQsinceinit)
		h->maxQsinceinit = h->Qdepth;

	start_io(h);
}

/* checks the status of the job and calls complete buffers to mark all
 * buffers for the completed job. Note that this function does not need
 * to hold the hba/queue lock.
 */
static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
				    int timeout)
{
	int status = 1;
	int retry_cmd = 0;

	if (timeout)
		status = 0;

	if (cmd->err_info->CommandStatus != 0) {	/* an error has occurred */
		switch (cmd->err_info->CommandStatus) {
			unsigned char sense_key;
		case CMD_TARGET_STATUS:
			status = 0;

			if (cmd->err_info->ScsiStatus == 0x02) {
				printk(KERN_WARNING "cciss: cmd %p "
				       "has CHECK CONDITION "
				       " byte 2 = 0x%x\n", cmd,
				       cmd->err_info->SenseInfo[2]
				    );
				/* check the sense key */
				sense_key = 0xf & cmd->err_info->SenseInfo[2];
				/* no status or recovered error */
				if ((sense_key == 0x0) || (sense_key == 0x1)) {
					status = 1;
				}
			} else {
				printk(KERN_WARNING "cciss: cmd %p "
				       "has SCSI Status 0x%x\n",
				       cmd, cmd->err_info->ScsiStatus);
			}
			break;
		case CMD_DATA_UNDERRUN:
			printk(KERN_WARNING "cciss: cmd %p has"
			       " completed with data underrun "
			       "reported\n", cmd);
			break;
		case CMD_DATA_OVERRUN:
			printk(KERN_WARNING "cciss: cmd %p has"
			       " completed with data overrun "
			       "reported\n", cmd);
			break;
		case CMD_INVALID:
			printk(KERN_WARNING "cciss: cmd %p is "
			       "reported invalid\n", cmd);
			status = 0;
			break;
		case CMD_PROTOCOL_ERR:
			printk(KERN_WARNING "cciss: cmd %p has "
			       "protocol error \n", cmd);
			status = 0;
			break;
		case CMD_HARDWARE_ERR:
			printk(KERN_WARNING "cciss: cmd %p had "
			       " hardware error\n", cmd);
			status = 0;
			break;
		case CMD_CONNECTION_LOST:
			printk(KERN_WARNING "cciss: cmd %p had "
			       "connection lost\n", cmd);
			status = 0;
			break;
		case CMD_ABORTED:
			printk(KERN_WARNING "cciss: cmd %p was "
			       "aborted\n", cmd);
			status = 0;
			break;
		case CMD_ABORT_FAILED:
			printk(KERN_WARNING "cciss: cmd %p reports "
			       "abort failed\n", cmd);
			status = 0;
			break;
		case CMD_UNSOLICITED_ABORT:
			printk(KERN_WARNING "cciss%d: unsolicited "
			       "abort %p\n", h->ctlr, cmd);
			if (cmd->retry_count < MAX_CMD_RETRIES) {
				retry_cmd = 1;
				printk(KERN_WARNING
				       "cciss%d: retrying %p\n", h->ctlr, cmd);
				cmd->retry_count++;
			} else
				printk(KERN_WARNING
				       "cciss%d: %p retried too "
				       "many times\n", h->ctlr, cmd);
			status = 0;
			break;
		case CMD_TIMEOUT:
			printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
			status = 0;
			break;
		default:
			printk(KERN_WARNING "cciss: cmd %p returned "
			       "unknown status %x\n", cmd,
			       cmd->err_info->CommandStatus);
			status = 0;
		}
	}
	/* We need to return this command */
	if (retry_cmd) {
		resend_cciss_cmd(h, cmd);
		return;
	}

	cmd->rq->completion_data = cmd;
	cmd->rq->errors = status;
	blk_add_trace_rq(cmd->rq->q, cmd->rq, BLK_TA_COMPLETE);
	blk_complete_request(cmd->rq);
}

/*
 * Get a request and submit it to the controller.
 */
static void do_cciss_request(request_queue_t *q)
{
	ctlr_info_t *h = q->queuedata;
	CommandList_struct *c;
	sector_t start_blk;
	int seg;
	struct request *creq;
	u64bit temp64;
	struct scatterlist tmp_sg[MAXSGENTRIES];
	drive_info_struct *drv;
	int i, dir;

	/* We call start_io here in case there is a command waiting on the
	 * queue that has not been sent.
	 */
	if (blk_queue_plugged(q))
		goto startio;

      queue:
	creq = elv_next_request(q);
	if (!creq)
		goto startio;

	BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);

	if ((c = cmd_alloc(h, 1)) == NULL)
		goto full;

	blkdev_dequeue_request(creq);

	spin_unlock_irq(q->queue_lock);

	c->cmd_type = CMD_RWREQ;
	c->rq = creq;

	/* fill in the request */
	drv = creq->rq_disk->private_data;
	c->Header.ReplyQueue = 0;	// unused in simple mode
	/* got command from pool, so use the command block index instead */
	/* for direct lookups. */
	/* The first 2 bits are reserved for controller error reporting. */
	c->Header.Tag.lower = (c->cmdindex << 3);
	c->Header.Tag.lower |= 0x04;	/* flag for direct lookup. */
	c->Header.LUN.LogDev.VolId = drv->LunID;
	c->Header.LUN.LogDev.Mode = 1;
	c->Request.CDBLen = 10;	// 12 byte commands not in FW yet;
	c->Request.Type.Type = TYPE_CMD;	// It is a command.
	c->Request.Type.Attribute = ATTR_SIMPLE;
	c->Request.Type.Direction =
	    (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
	c->Request.Timeout = 0;	// Don't time out
	c->Request.CDB[0] =
	    (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
	start_blk = creq->sector;
#ifdef CCISS_DEBUG
	printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n", (int)creq->sector,
	       (int)creq->nr_sectors);
#endif				/* CCISS_DEBUG */

	seg = blk_rq_map_sg(q, creq, tmp_sg);

	/* get the DMA records for the setup */
	if (c->Request.Type.Direction == XFER_READ)
		dir = PCI_DMA_FROMDEVICE;
	else
		dir = PCI_DMA_TODEVICE;

	for (i = 0; i < seg; i++) {
		c->SG[i].Len = tmp_sg[i].length;
		temp64.val = (__u64) pci_map_page(h->pdev, tmp_sg[i].page,
						  tmp_sg[i].offset,
						  tmp_sg[i].length, dir);
		c->SG[i].Addr.lower = temp64.val32.lower;
		c->SG[i].Addr.upper = temp64.val32.upper;
		c->SG[i].Ext = 0;	// we are not chaining
	}
	/* track how many SG entries we are using */
	if (seg > h->maxSG)
		h->maxSG = seg;

#ifdef CCISS_DEBUG
	printk(KERN_DEBUG "cciss: Submitting %d sectors in %d segments\n",
	       creq->nr_sectors, seg);
#endif				/* CCISS_DEBUG */

	c->Header.SGList = c->Header.SGTotal = seg;
	if(h->cciss_read == CCISS_READ_10) {
		c->Request.CDB[1] = 0;
		c->Request.CDB[2] = (start_blk >> 24) & 0xff;	//MSB
		c->Request.CDB[3] = (start_blk >> 16) & 0xff;
		c->Request.CDB[4] = (start_blk >> 8) & 0xff;
		c->Request.CDB[5] = start_blk & 0xff;
		c->Request.CDB[6] = 0;	// (sect >> 24) & 0xff; MSB
		c->Request.CDB[7] = (creq->nr_sectors >> 8) & 0xff;
		c->Request.CDB[8] = creq->nr_sectors & 0xff;
		c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
	} else {
		c->Request.CDBLen = 16;
		c->Request.CDB[1]= 0;
		c->Request.CDB[2]= (start_blk >> 56) & 0xff;	//MSB
		c->Request.CDB[3]= (start_blk >> 48) & 0xff;
		c->Request.CDB[4]= (start_blk >> 40) & 0xff;
		c->Request.CDB[5]= (start_blk >> 32) & 0xff;
		c->Request.CDB[6]= (start_blk >> 24) & 0xff;
		c->Request.CDB[7]= (start_blk >> 16) & 0xff;
		c->Request.CDB[8]= (start_blk >>  8) & 0xff;
		c->Request.CDB[9]= start_blk & 0xff;
		c->Request.CDB[10]= (creq->nr_sectors >>  24) & 0xff;
		c->Request.CDB[11]= (creq->nr_sectors >>  16) & 0xff;
		c->Request.CDB[12]= (creq->nr_sectors >>  8) & 0xff;
		c->Request.CDB[13]= creq->nr_sectors & 0xff;
		c->Request.CDB[14] = c->Request.CDB[15] = 0;
	}

	spin_lock_irq(q->queue_lock);

	addQ(&(h->reqQ), c);
	h->Qdepth++;
	if (h->Qdepth > h->maxQsinceinit)
		h->maxQsinceinit = h->Qdepth;

	goto queue;
full:
	blk_stop_queue(q);
startio:
	/* We will already have the driver lock here so not need
	 * to lock it.
	 */
	start_io(h);
}

static inline unsigned long get_next_completion(ctlr_info_t *h)
{
#ifdef CONFIG_CISS_SCSI_TAPE
	/* Any rejects from sendcmd() lying around? Process them first */
	if (h->scsi_rejects.ncompletions == 0)
		return h->access.command_completed(h);
	else {
		struct sendcmd_reject_list *srl;
		int n;
		srl = &h->scsi_rejects;
		n = --srl->ncompletions;
		/* printk("cciss%d: processing saved reject\n", h->ctlr); */
		printk("p");
		return srl->complete[n];
	}
#else
	return h->access.command_completed(h);
#endif
}

static inline int interrupt_pending(ctlr_info_t *h)
{
#ifdef CONFIG_CISS_SCSI_TAPE
	return (h->access.intr_pending(h)
		|| (h->scsi_rejects.ncompletions > 0));
#else
	return h->access.intr_pending(h);
#endif
}

static inline long interrupt_not_for_us(ctlr_info_t *h)
{
#ifdef CONFIG_CISS_SCSI_TAPE
	return (((h->access.intr_pending(h) == 0) ||
		 (h->interrupts_enabled == 0))
		&& (h->scsi_rejects.ncompletions == 0));
#else
	return (((h->access.intr_pending(h) == 0) ||
		 (h->interrupts_enabled == 0)));
#endif
}

static irqreturn_t do_cciss_intr(int irq, void *dev_id)
{
	ctlr_info_t *h = dev_id;
	CommandList_struct *c;
	unsigned long flags;
	__u32 a, a1, a2;

	if (interrupt_not_for_us(h))
		return IRQ_NONE;
	/*
	 * If there are completed commands in the completion queue,
	 * we had better do something about it.
	 */
	spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
	while (interrupt_pending(h)) {
		while ((a = get_next_completion(h)) != FIFO_EMPTY) {
			a1 = a;
			if ((a & 0x04)) {
				a2 = (a >> 3);
				if (a2 >= NR_CMDS) {
					printk(KERN_WARNING
					       "cciss: controller cciss%d failed, stopping.\n",
					       h->ctlr);
					fail_all_cmds(h->ctlr);
					return IRQ_HANDLED;
				}

				c = h->cmd_pool + a2;
				a = c->busaddr;

			} else {
				a &= ~3;
				if ((c = h->cmpQ) == NULL) {
					printk(KERN_WARNING
					       "cciss: Completion of %08x ignored\n",
					       a1);
					continue;
				}
				while (c->busaddr != a) {
					c = c->next;
					if (c == h->cmpQ)
						break;
				}
			}
			/*
			 * If we've found the command, take it off the
			 * completion Q and free it
			 */
			if (c->busaddr == a) {
				removeQ(&h->cmpQ, c);
				if (c->cmd_type == CMD_RWREQ) {
					complete_command(h, c, 0);
				} else if (c->cmd_type == CMD_IOCTL_PEND) {
					complete(c->waiting);
				}
#				ifdef CONFIG_CISS_SCSI_TAPE
				else if (c->cmd_type == CMD_SCSI)
					complete_scsi_command(c, 0, a1);
#				endif
				continue;
			}
		}
	}

	spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
	return IRQ_HANDLED;
}

/*
 *  We cannot read the structure directly, for portability we must use
 *   the io functions.
 *   This is for debug only.
 */
#ifdef CCISS_DEBUG
static void print_cfg_table(CfgTable_struct *tb)
{
	int i;
	char temp_name[17];

	printk("Controller Configuration information\n");
	printk("------------------------------------\n");
	for (i = 0; i < 4; i++)
		temp_name[i] = readb(&(tb->Signature[i]));
	temp_name[4] = '\0';
	printk("   Signature = %s\n", temp_name);
	printk("   Spec Number = %d\n", readl(&(tb->SpecValence)));
	printk("   Transport methods supported = 0x%x\n",
	       readl(&(tb->TransportSupport)));
	printk("   Transport methods active = 0x%x\n",
	       readl(&(tb->TransportActive)));
	printk("   Requested transport Method = 0x%x\n",
	       readl(&(tb->HostWrite.TransportRequest)));
	printk("   Coalesce Interrupt Delay = 0x%x\n",
	       readl(&(tb->HostWrite.CoalIntDelay)));
	printk("   Coalesce Interrupt Count = 0x%x\n",
	       readl(&(tb->HostWrite.CoalIntCount)));
	printk("   Max outstanding commands = 0x%d\n",
	       readl(&(tb->CmdsOutMax)));
	printk("   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
	for (i = 0; i < 16; i++)
		temp_name[i] = readb(&(tb->ServerName[i]));
	temp_name[16] = '\0';
	printk("   Server Name = %s\n", temp_name);
	printk("   Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
}
#endif				/* CCISS_DEBUG */

static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
{
	int i, offset, mem_type, bar_type;
	if (pci_bar_addr == PCI_BASE_ADDRESS_0)	/* looking for BAR zero? */
		return 0;
	offset = 0;
	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
		bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
		if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
			offset += 4;
		else {
			mem_type = pci_resource_flags(pdev, i) &
			    PCI_BASE_ADDRESS_MEM_TYPE_MASK;
			switch (mem_type) {
			case PCI_BASE_ADDRESS_MEM_TYPE_32:
			case PCI_BASE_ADDRESS_MEM_TYPE_1M:
				offset += 4;	/* 32 bit */
				break;
			case PCI_BASE_ADDRESS_MEM_TYPE_64:
				offset += 8;
				break;
			default:	/* reserved in PCI 2.2 */
				printk(KERN_WARNING
				       "Base address is invalid\n");
				return -1;
				break;
			}
		}
		if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
			return i + 1;
	}
	return -1;
}

/* If MSI/MSI-X is supported by the kernel we will try to enable it on
 * controllers that are capable. If not, we use IO-APIC mode.
 */

static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
					   struct pci_dev *pdev, __u32 board_id)
{
#ifdef CONFIG_PCI_MSI
	int err;
	struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
	{0, 2}, {0, 3}
	};

	/* Some boards advertise MSI but don't really support it */
	if ((board_id == 0x40700E11) ||
	    (board_id == 0x40800E11) ||
	    (board_id == 0x40820E11) || (board_id == 0x40830E11))
		goto default_int_mode;

	if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
		err = pci_enable_msix(pdev, cciss_msix_entries, 4);
		if (!err) {
			c->intr[0] = cciss_msix_entries[0].vector;
			c->intr[1] = cciss_msix_entries[1].vector;
			c->intr[2] = cciss_msix_entries[2].vector;
			c->intr[3] = cciss_msix_entries[3].vector;
			c->msix_vector = 1;
			return;
		}
		if (err > 0) {
			printk(KERN_WARNING "cciss: only %d MSI-X vectors "
			       "available\n", err);
		} else {
			printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
			       err);
		}
	}
	if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
		if (!pci_enable_msi(pdev)) {
			c->intr[SIMPLE_MODE_INT] = pdev->irq;
			c->msi_vector = 1;
			return;
		} else {
			printk(KERN_WARNING "cciss: MSI init failed\n");
			c->intr[SIMPLE_MODE_INT] = pdev->irq;
			return;
		}
	}
      default_int_mode:
#endif				/* CONFIG_PCI_MSI */
	/* if we get here we're going to use the default interrupt mode */
	c->intr[SIMPLE_MODE_INT] = pdev->irq;
	return;
}

static int cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
{
	ushort subsystem_vendor_id, subsystem_device_id, command;
	__u32 board_id, scratchpad = 0;
	__u64 cfg_offset;
	__u32 cfg_base_addr;
	__u64 cfg_base_addr_index;
	int i, err;

	/* check to see if controller has been disabled */
	/* BEFORE trying to enable it */
	(void)pci_read_config_word(pdev, PCI_COMMAND, &command);
	if (!(command & 0x02)) {
		printk(KERN_WARNING
		       "cciss: controller appears to be disabled\n");
		return -ENODEV;
	}

	err = pci_enable_device(pdev);
	if (err) {
		printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
		return err;
	}

	err = pci_request_regions(pdev, "cciss");
	if (err) {
		printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
		       "aborting\n");
		goto err_out_disable_pdev;
	}

	subsystem_vendor_id = pdev->subsystem_vendor;
	subsystem_device_id = pdev->subsystem_device;
	board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
		    subsystem_vendor_id);

#ifdef CCISS_DEBUG
	printk("command = %x\n", command);
	printk("irq = %x\n", pdev->irq);
	printk("board_id = %x\n", board_id);
#endif				/* CCISS_DEBUG */

/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
 * else we use the IO-APIC interrupt assigned to us by system ROM.
 */
	cciss_interrupt_mode(c, pdev, board_id);

	/*
	 * Memory base addr is first addr , the second points to the config
	 *   table
	 */

	c->paddr = pci_resource_start(pdev, 0);	/* addressing mode bits already removed */
#ifdef CCISS_DEBUG
	printk("address 0 = %x\n", c->paddr);
#endif				/* CCISS_DEBUG */
	c->vaddr = remap_pci_mem(c->paddr, 200);

	/* Wait for the board to become ready.  (PCI hotplug needs this.)
	 * We poll for up to 120 secs, once per 100ms. */
	for (i = 0; i < 1200; i++) {
		scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
		if (scratchpad == CCISS_FIRMWARE_READY)
			break;
		set_current_state(TASK_INTERRUPTIBLE);
		schedule_timeout(HZ / 10);	/* wait 100ms */
	}
	if (scratchpad != CCISS_FIRMWARE_READY) {
		printk(KERN_WARNING "cciss: Board not ready.  Timed out.\n");
		err = -ENODEV;
		goto err_out_free_res;
	}

	/* get the address index number */
	cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
	cfg_base_addr &= (__u32) 0x0000ffff;
#ifdef CCISS_DEBUG
	printk("cfg base address = %x\n", cfg_base_addr);
#endif				/* CCISS_DEBUG */
	cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
#ifdef CCISS_DEBUG
	printk("cfg base address index = %x\n", cfg_base_addr_index);
#endif				/* CCISS_DEBUG */
	if (cfg_base_addr_index == -1) {
		printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
		err = -ENODEV;
		goto err_out_free_res;
	}

	cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
#ifdef CCISS_DEBUG
	printk("cfg offset = %x\n", cfg_offset);
#endif				/* CCISS_DEBUG */
	c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
						       cfg_base_addr_index) +
				    cfg_offset, sizeof(CfgTable_struct));
	c->board_id = board_id;

#ifdef CCISS_DEBUG
	print_cfg_table(c->cfgtable);
#endif				/* CCISS_DEBUG */

	for (i = 0; i < ARRAY_SIZE(products); i++) {
		if (board_id == products[i].board_id) {
			c->product_name = products[i].product_name;
			c->access = *(products[i].access);
			break;
		}
	}
	if (i == ARRAY_SIZE(products)) {
		printk(KERN_WARNING "cciss: Sorry, I don't know how"
		       " to access the Smart Array controller %08lx\n",
		       (unsigned long)board_id);
		err = -ENODEV;
		goto err_out_free_res;
	}
	if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
	    (readb(&c->cfgtable->Signature[1]) != 'I') ||
	    (readb(&c->cfgtable->Signature[2]) != 'S') ||
	    (readb(&c->cfgtable->Signature[3]) != 'S')) {
		printk("Does not appear to be a valid CISS config table\n");
		err = -ENODEV;
		goto err_out_free_res;
	}
#ifdef CONFIG_X86
	{
		/* Need to enable prefetch in the SCSI core for 6400 in x86 */
		__u32 prefetch;
		prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
		prefetch |= 0x100;
		writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
	}
#endif

#ifdef CCISS_DEBUG
	printk("Trying to put board into Simple mode\n");
#endif				/* CCISS_DEBUG */
	c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
	/* Update the field, and then ring the doorbell */
	writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
	writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);

	/* under certain very rare conditions, this can take awhile.
	 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
	 * as we enter this code.) */
	for (i = 0; i < MAX_CONFIG_WAIT; i++) {
		if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
			break;
		/* delay and try again */
		set_current_state(TASK_INTERRUPTIBLE);
		schedule_timeout(10);
	}

#ifdef CCISS_DEBUG
	printk(KERN_DEBUG "I counter got to %d %x\n", i,
	       readl(c->vaddr + SA5_DOORBELL));
#endif				/* CCISS_DEBUG */
#ifdef CCISS_DEBUG
	print_cfg_table(c->cfgtable);
#endif				/* CCISS_DEBUG */

	if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
		printk(KERN_WARNING "cciss: unable to get board into"
		       " simple mode\n");
		err = -ENODEV;
		goto err_out_free_res;
	}
	return 0;

      err_out_free_res:
	pci_release_regions(pdev);

      err_out_disable_pdev:
	pci_disable_device(pdev);
	return err;
}

/*
 * Gets information about the local volumes attached to the controller.
 */
static void cciss_getgeometry(int cntl_num)
{
	ReportLunData_struct *ld_buff;
	InquiryData_struct *inq_buff;
	int return_code;
	int i;
	int listlength = 0;
	__u32 lunid = 0;
	int block_size;
	sector_t total_size;

	ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
	if (ld_buff == NULL) {
		printk(KERN_ERR "cciss: out of memory\n");
		return;
	}
	inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
	if (inq_buff == NULL) {
		printk(KERN_ERR "cciss: out of memory\n");
		kfree(ld_buff);
		return;
	}
	/* Get the firmware version */
	return_code = sendcmd(CISS_INQUIRY, cntl_num, inq_buff,
			      sizeof(InquiryData_struct), 0, 0, 0, NULL,
			      TYPE_CMD);
	if (return_code == IO_OK) {
		hba[cntl_num]->firm_ver[0] = inq_buff->data_byte[32];
		hba[cntl_num]->firm_ver[1] = inq_buff->data_byte[33];
		hba[cntl_num]->firm_ver[2] = inq_buff->data_byte[34];
		hba[cntl_num]->firm_ver[3] = inq_buff->data_byte[35];
	} else {		/* send command failed */

		printk(KERN_WARNING "cciss: unable to determine firmware"
		       " version of controller\n");
	}
	/* Get the number of logical volumes */
	return_code = sendcmd(CISS_REPORT_LOG, cntl_num, ld_buff,
			      sizeof(ReportLunData_struct), 0, 0, 0, NULL,
			      TYPE_CMD);

	if (return_code == IO_OK) {
#ifdef CCISS_DEBUG
		printk("LUN Data\n--------------------------\n");
#endif				/* CCISS_DEBUG */

		listlength |=
		    (0xff & (unsigned int)(ld_buff->LUNListLength[0])) << 24;
		listlength |=
		    (0xff & (unsigned int)(ld_buff->LUNListLength[1])) << 16;
		listlength |=
		    (0xff & (unsigned int)(ld_buff->LUNListLength[2])) << 8;
		listlength |= 0xff & (unsigned int)(ld_buff->LUNListLength[3]);
	} else {		/* reading number of logical volumes failed */

		printk(KERN_WARNING "cciss: report logical volume"
		       " command failed\n");
		listlength = 0;
	}
	hba[cntl_num]->num_luns = listlength / 8;	// 8 bytes pre entry
	if (hba[cntl_num]->num_luns > CISS_MAX_LUN) {
		printk(KERN_ERR
		       "ciss:  only %d number of logical volumes supported\n",
		       CISS_MAX_LUN);
		hba[cntl_num]->num_luns = CISS_MAX_LUN;
	}
#ifdef CCISS_DEBUG
	printk(KERN_DEBUG "Length = %x %x %x %x = %d\n",
	       ld_buff->LUNListLength[0], ld_buff->LUNListLength[1],
	       ld_buff->LUNListLength[2], ld_buff->LUNListLength[3],
	       hba[cntl_num]->num_luns);
#endif				/* CCISS_DEBUG */

	hba[cntl_num]->highest_lun = hba[cntl_num]->num_luns - 1;
	for (i = 0; i < CISS_MAX_LUN; i++) {
		if (i < hba[cntl_num]->num_luns) {
			lunid = (0xff & (unsigned int)(ld_buff->LUN[i][3]))
			    << 24;
			lunid |= (0xff & (unsigned int)(ld_buff->LUN[i][2]))
			    << 16;
			lunid |= (0xff & (unsigned int)(ld_buff->LUN[i][1]))
			    << 8;
			lunid |= 0xff & (unsigned int)(ld_buff->LUN[i][0]);

			hba[cntl_num]->drv[i].LunID = lunid;

#ifdef CCISS_DEBUG
			printk(KERN_DEBUG "LUN[%d]:  %x %x %x %x = %x\n", i,
			       ld_buff->LUN[i][0], ld_buff->LUN[i][1],
			       ld_buff->LUN[i][2], ld_buff->LUN[i][3],
			       hba[cntl_num]->drv[i].LunID);
#endif				/* CCISS_DEBUG */

		/* testing to see if 16-byte CDBs are already being used */
		if(hba[cntl_num]->cciss_read == CCISS_READ_16) {
			cciss_read_capacity_16(cntl_num, i, 0,
					    &total_size, &block_size);
			goto geo_inq;
		}
		cciss_read_capacity(cntl_num, i, 0, &total_size, &block_size);

		/* total_size = last LBA + 1 */
		if(total_size == (__u32) 0) {
			cciss_read_capacity_16(cntl_num, i, 0,
			&total_size, &block_size);
			hba[cntl_num]->cciss_read = CCISS_READ_16;
			hba[cntl_num]->cciss_write = CCISS_WRITE_16;
		} else {
			hba[cntl_num]->cciss_read = CCISS_READ_10;
			hba[cntl_num]->cciss_write = CCISS_WRITE_10;
		}
geo_inq:
			cciss_geometry_inquiry(cntl_num, i, 0, total_size,
					       block_size, inq_buff,
					       &hba[cntl_num]->drv[i]);
		} else {
			/* initialize raid_level to indicate a free space */
			hba[cntl_num]->drv[i].raid_level = -1;
		}
	}
	kfree(ld_buff);
	kfree(inq_buff);
}

/* Function to find the first free pointer into our hba[] array */
/* Returns -1 if no free entries are left.  */
static int alloc_cciss_hba(void)
{
	struct gendisk *disk[NWD];
	int i, n;
	for (n = 0; n < NWD; n++) {
		disk[n] = alloc_disk(1 << NWD_SHIFT);
		if (!disk[n])
			goto out;
	}

	for (i = 0; i < MAX_CTLR; i++) {
		if (!hba[i]) {
			ctlr_info_t *p;
			p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
			if (!p)
				goto Enomem;
			for (n = 0; n < NWD; n++)
				p->gendisk[n] = disk[n];
			hba[i] = p;
			return i;
		}
	}
	printk(KERN_WARNING "cciss: This driver supports a maximum"
	       " of %d controllers.\n", MAX_CTLR);
	goto out;
      Enomem:
	printk(KERN_ERR "cciss: out of memory.\n");
      out:
	while (n--)
		put_disk(disk[n]);
	return -1;
}

static void free_hba(int i)
{
	ctlr_info_t *p = hba[i];
	int n;

	hba[i] = NULL;
	for (n = 0; n < NWD; n++)
		put_disk(p->gendisk[n]);
	kfree(p);
}

/*
 *  This is it.  Find all the controllers and register them.  I really hate
 *  stealing all these major device numbers.
 *  returns the number of block devices registered.
 */
static int __devinit cciss_init_one(struct pci_dev *pdev,
				    const struct pci_device_id *ent)
{
	request_queue_t *q;
	int i;
	int j;
	int rc;
	int dac;

	i = alloc_cciss_hba();
	if (i < 0)
		return -1;

	hba[i]->busy_initializing = 1;

	if (cciss_pci_init(hba[i], pdev) != 0)
		goto clean1;

	sprintf(hba[i]->devname, "cciss%d", i);
	hba[i]->ctlr = i;
	hba[i]->pdev = pdev;

	/* configure PCI DMA stuff */
	if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK))
		dac = 1;
	else if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK))
		dac = 0;
	else {
		printk(KERN_ERR "cciss: no suitable DMA available\n");
		goto clean1;
	}

	/*
	 * register with the major number, or get a dynamic major number
	 * by passing 0 as argument.  This is done for greater than
	 * 8 controller support.
	 */
	if (i < MAX_CTLR_ORIG)
		hba[i]->major = COMPAQ_CISS_MAJOR + i;
	rc = register_blkdev(hba[i]->major, hba[i]->devname);
	if (rc == -EBUSY || rc == -EINVAL) {
		printk(KERN_ERR
		       "cciss:  Unable to get major number %d for %s "
		       "on hba %d\n", hba[i]->major, hba[i]->devname, i);
		goto clean1;
	} else {
		if (i >= MAX_CTLR_ORIG)
			hba[i]->major = rc;
	}

	/* make sure the board interrupts are off */
	hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
	if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
			IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
		printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
		       hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
		goto clean2;
	}

	printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
	       hba[i]->devname, pdev->device, pci_name(pdev),
	       hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");

	hba[i]->cmd_pool_bits =
	    kmalloc(((NR_CMDS + BITS_PER_LONG -
		      1) / BITS_PER_LONG) * sizeof(unsigned long), GFP_KERNEL);
	hba[i]->cmd_pool = (CommandList_struct *)
	    pci_alloc_consistent(hba[i]->pdev,
		    NR_CMDS * sizeof(CommandList_struct),
		    &(hba[i]->cmd_pool_dhandle));
	hba[i]->errinfo_pool = (ErrorInfo_struct *)
	    pci_alloc_consistent(hba[i]->pdev,
		    NR_CMDS * sizeof(ErrorInfo_struct),
		    &(hba[i]->errinfo_pool_dhandle));
	if ((hba[i]->cmd_pool_bits == NULL)
	    || (hba[i]->cmd_pool == NULL)
	    || (hba[i]->errinfo_pool == NULL)) {
		printk(KERN_ERR "cciss: out of memory");
		goto clean4;
	}
#ifdef CONFIG_CISS_SCSI_TAPE
	hba[i]->scsi_rejects.complete =
	    kmalloc(sizeof(hba[i]->scsi_rejects.complete[0]) *
		    (NR_CMDS + 5), GFP_KERNEL);
	if (hba[i]->scsi_rejects.complete == NULL) {
		printk(KERN_ERR "cciss: out of memory");
		goto clean4;
	}
#endif
	spin_lock_init(&hba[i]->lock);

	/* Initialize the pdev driver private data.
	   have it point to hba[i].  */
	pci_set_drvdata(pdev, hba[i]);
	/* command and error info recs zeroed out before
	   they are used */
	memset(hba[i]->cmd_pool_bits, 0,
	       ((NR_CMDS + BITS_PER_LONG -
		 1) / BITS_PER_LONG) * sizeof(unsigned long));

#ifdef CCISS_DEBUG
	printk(KERN_DEBUG "Scanning for drives on controller cciss%d\n", i);
#endif				/* CCISS_DEBUG */

	cciss_getgeometry(i);

	cciss_scsi_setup(i);

	/* Turn the interrupts on so we can service requests */
	hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);

	cciss_procinit(i);
	hba[i]->busy_initializing = 0;

	for (j = 0; j < NWD; j++) {	/* mfm */
		drive_info_struct *drv = &(hba[i]->drv[j]);
		struct gendisk *disk = hba[i]->gendisk[j];

		q = blk_init_queue(do_cciss_request, &hba[i]->lock);
		if (!q) {
			printk(KERN_ERR
			       "cciss:  unable to allocate queue for disk %d\n",
			       j);
			break;
		}
		drv->queue = q;

		q->backing_dev_info.ra_pages = READ_AHEAD;
		blk_queue_bounce_limit(q, hba[i]->pdev->dma_mask);

		/* This is a hardware imposed limit. */
		blk_queue_max_hw_segments(q, MAXSGENTRIES);

		/* This is a limit in the driver and could be eliminated. */
		blk_queue_max_phys_segments(q, MAXSGENTRIES);

		blk_queue_max_sectors(q, 512);

		blk_queue_softirq_done(q, cciss_softirq_done);

		q->queuedata = hba[i];
		sprintf(disk->disk_name, "cciss/c%dd%d", i, j);
		disk->major = hba[i]->major;
		disk->first_minor = j << NWD_SHIFT;
		disk->fops = &cciss_fops;
		disk->queue = q;
		disk->private_data = drv;
		disk->driverfs_dev = &pdev->dev;
		/* we must register the controller even if no disks exist */
		/* this is for the online array utilities */
		if (!drv->heads && j)
			continue;
		blk_queue_hardsect_size(q, drv->block_size);
		set_capacity(disk, drv->nr_blocks);
		add_disk(disk);
	}

	return 1;

      clean4:
#ifdef CONFIG_CISS_SCSI_TAPE
	kfree(hba[i]->scsi_rejects.complete);
#endif
	kfree(hba[i]->cmd_pool_bits);
	if (hba[i]->cmd_pool)
		pci_free_consistent(hba[i]->pdev,
				    NR_CMDS * sizeof(CommandList_struct),
				    hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
	if (hba[i]->errinfo_pool)
		pci_free_consistent(hba[i]->pdev,
				    NR_CMDS * sizeof(ErrorInfo_struct),
				    hba[i]->errinfo_pool,
				    hba[i]->errinfo_pool_dhandle);
	free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
      clean2:
	unregister_blkdev(hba[i]->major, hba[i]->devname);
      clean1:
	hba[i]->busy_initializing = 0;
	free_hba(i);
	return -1;
}

static void __devexit cciss_remove_one(struct pci_dev *pdev)
{
	ctlr_info_t *tmp_ptr;
	int i, j;
	char flush_buf[4];
	int return_code;

	if (pci_get_drvdata(pdev) == NULL) {
		printk(KERN_ERR "cciss: Unable to remove device \n");
		return;
	}
	tmp_ptr = pci_get_drvdata(pdev);
	i = tmp_ptr->ctlr;
	if (hba[i] == NULL) {
		printk(KERN_ERR "cciss: device appears to "
		       "already be removed \n");
		return;
	}
	/* Turn board interrupts off  and send the flush cache command */
	/* sendcmd will turn off interrupt, and send the flush...
	 * To write all data in the battery backed cache to disks */
	memset(flush_buf, 0, 4);
	return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0, 0, 0, NULL,
			      TYPE_CMD);
	if (return_code != IO_OK) {
		printk(KERN_WARNING "Error Flushing cache on controller %d\n",
		       i);
	}
	free_irq(hba[i]->intr[2], hba[i]);

#ifdef CONFIG_PCI_MSI
	if (hba[i]->msix_vector)
		pci_disable_msix(hba[i]->pdev);
	else if (hba[i]->msi_vector)
		pci_disable_msi(hba[i]->pdev);
#endif				/* CONFIG_PCI_MSI */

	iounmap(hba[i]->vaddr);
	cciss_unregister_scsi(i);	/* unhook from SCSI subsystem */
	unregister_blkdev(hba[i]->major, hba[i]->devname);
	remove_proc_entry(hba[i]->devname, proc_cciss);

	/* remove it from the disk list */
	for (j = 0; j < NWD; j++) {
		struct gendisk *disk = hba[i]->gendisk[j];
		if (disk) {
			request_queue_t *q = disk->queue;

			if (disk->flags & GENHD_FL_UP)
				del_gendisk(disk);
			if (q)
				blk_cleanup_queue(q);
		}
	}

	pci_free_consistent(hba[i]->pdev, NR_CMDS * sizeof(CommandList_struct),
			    hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
	pci_free_consistent(hba[i]->pdev, NR_CMDS * sizeof(ErrorInfo_struct),
			    hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
	kfree(hba[i]->cmd_pool_bits);
#ifdef CONFIG_CISS_SCSI_TAPE
	kfree(hba[i]->scsi_rejects.complete);
#endif
	pci_release_regions(pdev);
	pci_disable_device(pdev);
	pci_set_drvdata(pdev, NULL);
	free_hba(i);
}

static struct pci_driver cciss_pci_driver = {
	.name = "cciss",
	.probe = cciss_init_one,
	.remove = __devexit_p(cciss_remove_one),
	.id_table = cciss_pci_device_id,	/* id_table */
};

/*
 *  This is it.  Register the PCI driver information for the cards we control
 *  the OS will call our registered routines when it finds one of our cards.
 */
static int __init cciss_init(void)
{
	printk(KERN_INFO DRIVER_NAME "\n");

	/* Register for our PCI devices */
	return pci_register_driver(&cciss_pci_driver);
}

static void __exit cciss_cleanup(void)
{
	int i;

	pci_unregister_driver(&cciss_pci_driver);
	/* double check that all controller entrys have been removed */
	for (i = 0; i < MAX_CTLR; i++) {
		if (hba[i] != NULL) {
			printk(KERN_WARNING "cciss: had to remove"
			       " controller %d\n", i);
			cciss_remove_one(hba[i]->pdev);
		}
	}
	remove_proc_entry("cciss", proc_root_driver);
}

static void fail_all_cmds(unsigned long ctlr)
{
	/* If we get here, the board is apparently dead. */
	ctlr_info_t *h = hba[ctlr];
	CommandList_struct *c;
	unsigned long flags;

	printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
	h->alive = 0;		/* the controller apparently died... */

	spin_lock_irqsave(CCISS_LOCK(ctlr), flags);

	pci_disable_device(h->pdev);	/* Make sure it is really dead. */

	/* move everything off the request queue onto the completed queue */
	while ((c = h->reqQ) != NULL) {
		removeQ(&(h->reqQ), c);
		h->Qdepth--;
		addQ(&(h->cmpQ), c);
	}

	/* Now, fail everything on the completed queue with a HW error */
	while ((c = h->cmpQ) != NULL) {
		removeQ(&h->cmpQ, c);
		c->err_info->CommandStatus = CMD_HARDWARE_ERR;
		if (c->cmd_type == CMD_RWREQ) {
			complete_command(h, c, 0);
		} else if (c->cmd_type == CMD_IOCTL_PEND)
			complete(c->waiting);
#ifdef CONFIG_CISS_SCSI_TAPE
		else if (c->cmd_type == CMD_SCSI)
			complete_scsi_command(c, 0, 0);
#endif
	}
	spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
	return;
}

module_init(cciss_init);
module_exit(cciss_cleanup);