summaryrefslogtreecommitdiff
path: root/drivers/scsi/megaraid/megaraid_sas_base.c
blob: 42cf38c1ea99281d5ebbd6fc21cc751b083b163c (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
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
5234
5235
5236
5237
5238
5239
5240
5241
5242
5243
5244
5245
5246
5247
5248
5249
5250
5251
5252
5253
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272
5273
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293
5294
5295
5296
5297
5298
5299
5300
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
5333
5334
5335
5336
5337
5338
5339
5340
5341
5342
5343
5344
5345
5346
5347
5348
5349
5350
5351
5352
5353
5354
5355
5356
5357
5358
5359
5360
5361
5362
5363
5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489
5490
5491
5492
5493
5494
5495
5496
5497
5498
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
5509
5510
5511
5512
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525
5526
5527
5528
5529
5530
5531
5532
5533
5534
5535
5536
5537
5538
5539
5540
5541
5542
5543
5544
5545
5546
5547
5548
5549
5550
5551
5552
5553
5554
5555
5556
5557
5558
5559
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
5572
5573
5574
5575
5576
5577
5578
5579
5580
5581
5582
5583
5584
5585
5586
5587
5588
5589
5590
5591
5592
5593
5594
5595
5596
5597
5598
5599
5600
5601
5602
5603
5604
5605
5606
5607
5608
5609
5610
5611
5612
5613
5614
5615
5616
5617
5618
5619
5620
5621
5622
5623
5624
5625
5626
5627
5628
5629
5630
5631
5632
5633
5634
5635
5636
5637
5638
5639
5640
5641
5642
5643
5644
5645
5646
5647
5648
5649
5650
5651
5652
5653
5654
5655
5656
5657
5658
5659
5660
5661
5662
5663
5664
5665
5666
5667
5668
5669
5670
5671
5672
5673
5674
5675
5676
5677
5678
5679
5680
5681
5682
5683
5684
5685
5686
5687
5688
5689
5690
5691
5692
5693
5694
5695
5696
5697
5698
5699
5700
5701
5702
5703
5704
5705
5706
5707
5708
5709
5710
5711
5712
5713
5714
5715
5716
5717
5718
5719
5720
5721
5722
5723
5724
5725
5726
5727
5728
5729
5730
5731
5732
5733
5734
5735
5736
5737
5738
5739
5740
5741
5742
5743
5744
5745
5746
5747
5748
5749
5750
5751
5752
5753
5754
5755
5756
5757
5758
5759
5760
5761
5762
5763
5764
5765
5766
5767
5768
5769
5770
5771
5772
5773
5774
5775
5776
5777
5778
5779
5780
5781
5782
5783
5784
5785
5786
5787
5788
5789
5790
5791
5792
5793
5794
5795
5796
5797
5798
5799
5800
5801
5802
5803
5804
5805
5806
5807
5808
5809
5810
5811
5812
5813
5814
5815
5816
5817
5818
5819
5820
5821
5822
5823
5824
5825
5826
5827
5828
5829
5830
5831
5832
5833
5834
5835
5836
5837
5838
5839
5840
5841
5842
5843
5844
5845
5846
5847
5848
5849
5850
5851
5852
5853
5854
5855
5856
5857
5858
5859
5860
5861
5862
5863
5864
5865
5866
5867
5868
5869
5870
5871
5872
5873
5874
5875
5876
5877
5878
5879
5880
5881
5882
5883
5884
5885
5886
5887
5888
5889
5890
5891
5892
5893
5894
5895
5896
5897
5898
5899
5900
5901
5902
5903
5904
5905
5906
5907
5908
5909
5910
5911
5912
5913
5914
5915
5916
5917
5918
5919
5920
5921
5922
5923
5924
5925
5926
5927
5928
5929
5930
5931
5932
5933
5934
5935
5936
5937
5938
5939
5940
5941
5942
5943
5944
5945
5946
5947
5948
5949
5950
5951
5952
5953
5954
5955
5956
5957
5958
5959
5960
5961
5962
5963
5964
5965
5966
5967
5968
5969
5970
5971
5972
5973
5974
5975
5976
5977
5978
5979
5980
5981
5982
5983
5984
5985
5986
5987
5988
5989
5990
5991
5992
5993
5994
5995
5996
5997
5998
5999
6000
6001
6002
6003
6004
6005
6006
6007
6008
6009
6010
6011
6012
6013
6014
6015
6016
6017
6018
6019
6020
6021
6022
6023
6024
6025
6026
6027
6028
6029
6030
6031
6032
6033
6034
6035
6036
6037
6038
6039
6040
6041
6042
6043
6044
6045
6046
6047
6048
6049
6050
6051
6052
6053
6054
6055
6056
6057
6058
6059
6060
6061
6062
6063
6064
6065
6066
6067
6068
6069
6070
6071
6072
6073
6074
6075
6076
6077
6078
6079
6080
6081
6082
6083
6084
6085
6086
6087
6088
6089
6090
6091
6092
6093
6094
6095
6096
6097
6098
6099
6100
6101
6102
6103
6104
6105
6106
6107
6108
6109
6110
6111
6112
6113
6114
6115
6116
6117
6118
6119
6120
6121
6122
6123
6124
6125
6126
6127
6128
6129
6130
6131
6132
6133
6134
6135
6136
6137
6138
6139
6140
6141
6142
6143
6144
6145
6146
6147
6148
6149
6150
6151
6152
6153
6154
6155
6156
6157
6158
6159
6160
6161
6162
6163
6164
6165
6166
6167
6168
6169
6170
6171
6172
6173
6174
6175
6176
6177
6178
6179
6180
6181
6182
6183
6184
6185
6186
6187
6188
6189
6190
6191
6192
6193
6194
6195
6196
6197
6198
6199
6200
6201
6202
6203
6204
6205
6206
6207
6208
6209
6210
6211
6212
6213
6214
6215
6216
6217
6218
6219
6220
6221
6222
6223
6224
6225
6226
6227
6228
6229
6230
6231
6232
6233
6234
6235
6236
6237
6238
6239
6240
6241
6242
6243
6244
6245
6246
6247
6248
6249
6250
6251
6252
6253
6254
6255
6256
6257
6258
6259
6260
6261
6262
6263
6264
6265
6266
6267
6268
6269
6270
6271
6272
6273
6274
6275
6276
6277
6278
6279
6280
6281
6282
6283
6284
6285
6286
6287
6288
6289
6290
6291
6292
6293
6294
6295
6296
6297
6298
6299
6300
6301
6302
6303
6304
6305
6306
6307
6308
6309
6310
6311
6312
6313
6314
6315
6316
6317
6318
6319
6320
6321
6322
6323
6324
6325
6326
6327
6328
6329
6330
6331
6332
6333
6334
6335
6336
6337
6338
6339
6340
6341
6342
6343
6344
6345
6346
6347
6348
6349
6350
6351
6352
6353
6354
6355
6356
6357
6358
6359
6360
6361
6362
6363
6364
6365
6366
6367
6368
6369
6370
6371
6372
6373
6374
6375
6376
6377
6378
6379
6380
6381
6382
6383
6384
6385
6386
6387
6388
6389
6390
6391
6392
6393
6394
6395
6396
6397
6398
6399
6400
6401
6402
6403
6404
6405
6406
6407
6408
6409
6410
6411
6412
6413
6414
6415
6416
6417
6418
6419
6420
6421
6422
6423
6424
6425
6426
6427
6428
6429
6430
6431
6432
6433
6434
6435
6436
6437
6438
6439
6440
6441
6442
6443
6444
6445
6446
6447
6448
6449
6450
6451
6452
6453
6454
6455
6456
6457
6458
6459
6460
6461
6462
6463
6464
6465
6466
6467
6468
6469
6470
6471
6472
6473
6474
6475
6476
6477
6478
6479
6480
6481
6482
6483
6484
6485
6486
6487
6488
6489
6490
6491
6492
6493
6494
6495
6496
6497
6498
6499
6500
6501
6502
6503
6504
6505
6506
6507
6508
6509
6510
6511
6512
6513
6514
6515
6516
6517
6518
6519
6520
6521
6522
6523
6524
6525
6526
6527
6528
6529
6530
6531
6532
6533
6534
6535
6536
6537
6538
6539
6540
6541
6542
6543
6544
6545
6546
6547
6548
6549
6550
6551
6552
6553
6554
6555
6556
6557
6558
6559
6560
6561
6562
6563
6564
6565
6566
6567
6568
6569
6570
6571
6572
6573
6574
6575
6576
6577
6578
6579
6580
6581
6582
6583
6584
6585
6586
6587
6588
6589
6590
6591
6592
6593
6594
6595
6596
6597
6598
6599
6600
6601
6602
6603
6604
6605
6606
6607
6608
6609
6610
6611
6612
6613
6614
6615
6616
6617
6618
6619
6620
6621
6622
6623
6624
6625
6626
6627
6628
6629
6630
6631
6632
6633
6634
6635
6636
6637
6638
6639
6640
6641
6642
6643
6644
6645
6646
6647
6648
6649
6650
6651
6652
6653
6654
6655
6656
6657
6658
6659
6660
6661
6662
6663
6664
6665
6666
6667
6668
6669
6670
6671
6672
6673
6674
6675
6676
6677
6678
6679
6680
6681
6682
6683
6684
6685
6686
6687
6688
6689
6690
6691
6692
6693
6694
6695
6696
6697
6698
6699
6700
6701
6702
6703
6704
6705
6706
6707
6708
6709
6710
6711
6712
6713
6714
6715
6716
6717
6718
6719
6720
6721
6722
6723
6724
6725
6726
6727
6728
6729
6730
6731
6732
6733
6734
6735
6736
6737
6738
6739
6740
6741
6742
6743
6744
6745
6746
6747
6748
6749
6750
6751
6752
6753
6754
6755
6756
6757
6758
6759
6760
6761
6762
6763
6764
6765
6766
6767
6768
6769
6770
6771
6772
6773
6774
6775
6776
6777
6778
6779
6780
6781
6782
6783
6784
6785
6786
6787
6788
6789
6790
6791
6792
6793
6794
6795
6796
6797
6798
6799
6800
6801
6802
6803
6804
6805
6806
6807
6808
6809
6810
6811
6812
6813
6814
6815
6816
6817
6818
6819
6820
6821
6822
6823
6824
6825
6826
6827
6828
6829
6830
6831
6832
6833
6834
6835
6836
6837
6838
6839
6840
6841
6842
6843
6844
6845
6846
6847
6848
6849
6850
6851
6852
6853
6854
6855
6856
6857
6858
6859
6860
6861
6862
6863
6864
6865
6866
6867
6868
6869
6870
6871
6872
6873
6874
6875
6876
6877
6878
6879
6880
6881
6882
6883
6884
6885
6886
6887
6888
6889
6890
6891
6892
6893
6894
6895
6896
6897
6898
6899
6900
6901
6902
6903
6904
6905
6906
6907
6908
6909
6910
6911
6912
6913
6914
6915
6916
6917
6918
6919
6920
6921
6922
6923
6924
6925
6926
6927
6928
6929
6930
6931
6932
6933
6934
6935
6936
6937
6938
6939
6940
6941
6942
6943
6944
6945
6946
6947
6948
6949
6950
6951
6952
6953
6954
6955
6956
6957
6958
6959
6960
6961
6962
6963
6964
6965
6966
6967
6968
6969
6970
6971
6972
6973
6974
6975
6976
6977
6978
6979
6980
6981
6982
6983
6984
6985
6986
6987
6988
6989
6990
6991
6992
6993
6994
6995
6996
6997
6998
6999
7000
7001
7002
7003
7004
7005
7006
7007
7008
7009
7010
7011
7012
7013
7014
7015
7016
7017
7018
7019
7020
7021
7022
7023
7024
7025
7026
7027
7028
7029
7030
7031
7032
7033
7034
7035
7036
7037
7038
7039
7040
7041
7042
7043
7044
7045
7046
7047
7048
7049
7050
7051
7052
7053
7054
7055
7056
7057
7058
7059
7060
7061
7062
7063
7064
7065
7066
7067
7068
7069
7070
7071
7072
7073
7074
7075
7076
7077
7078
7079
7080
7081
7082
7083
7084
7085
7086
7087
7088
7089
7090
7091
7092
7093
7094
7095
7096
7097
7098
7099
7100
7101
7102
7103
7104
7105
7106
7107
7108
7109
7110
7111
7112
7113
7114
7115
7116
7117
7118
7119
7120
7121
7122
7123
7124
7125
7126
7127
7128
7129
7130
7131
7132
7133
7134
7135
7136
7137
7138
7139
7140
7141
7142
7143
7144
7145
7146
7147
7148
7149
7150
7151
7152
7153
7154
7155
7156
7157
7158
7159
7160
7161
7162
7163
7164
7165
7166
7167
7168
7169
7170
7171
7172
7173
7174
7175
7176
7177
7178
7179
7180
7181
7182
7183
7184
7185
7186
7187
7188
7189
7190
7191
7192
7193
7194
7195
7196
7197
7198
7199
7200
7201
7202
7203
7204
7205
7206
7207
7208
7209
7210
7211
7212
7213
7214
7215
7216
7217
7218
7219
7220
7221
7222
7223
7224
7225
7226
7227
7228
7229
7230
7231
7232
7233
7234
7235
7236
7237
7238
7239
7240
7241
7242
7243
7244
7245
7246
7247
7248
7249
7250
7251
7252
7253
7254
7255
7256
7257
7258
7259
7260
7261
7262
7263
7264
7265
7266
7267
7268
7269
7270
7271
7272
7273
7274
7275
7276
7277
7278
7279
7280
7281
7282
7283
7284
7285
7286
7287
7288
7289
7290
7291
7292
7293
7294
7295
7296
7297
7298
7299
7300
7301
7302
7303
7304
7305
7306
7307
7308
7309
7310
7311
7312
7313
7314
7315
7316
7317
7318
7319
7320
7321
7322
7323
7324
7325
7326
7327
7328
7329
7330
7331
7332
7333
7334
7335
7336
7337
7338
7339
7340
7341
7342
7343
7344
7345
7346
7347
7348
7349
7350
7351
7352
7353
7354
7355
7356
7357
7358
7359
7360
7361
7362
7363
7364
7365
7366
7367
7368
7369
7370
7371
7372
7373
7374
7375
7376
7377
7378
7379
7380
7381
7382
7383
7384
7385
7386
7387
7388
7389
7390
7391
7392
7393
7394
7395
7396
7397
7398
7399
7400
7401
7402
7403
7404
7405
7406
7407
7408
7409
7410
7411
7412
7413
7414
7415
7416
7417
7418
7419
7420
7421
7422
7423
7424
7425
7426
7427
7428
7429
7430
7431
7432
7433
7434
7435
7436
7437
7438
7439
7440
7441
7442
7443
7444
7445
7446
7447
7448
7449
7450
7451
7452
7453
7454
7455
7456
7457
7458
7459
7460
7461
7462
7463
7464
7465
7466
7467
7468
7469
7470
7471
7472
7473
7474
7475
7476
7477
7478
7479
7480
7481
7482
7483
7484
7485
7486
7487
7488
7489
7490
7491
7492
7493
7494
7495
7496
7497
7498
7499
7500
7501
7502
7503
7504
7505
7506
7507
7508
7509
7510
7511
7512
7513
7514
7515
7516
7517
7518
7519
7520
7521
7522
7523
7524
7525
7526
7527
7528
7529
7530
7531
7532
7533
7534
7535
7536
7537
7538
7539
7540
7541
7542
7543
7544
7545
7546
7547
7548
7549
7550
7551
7552
7553
7554
7555
7556
7557
7558
7559
7560
7561
7562
7563
7564
7565
7566
7567
7568
7569
7570
7571
7572
7573
7574
7575
7576
7577
7578
7579
7580
7581
7582
7583
7584
7585
7586
7587
7588
7589
7590
7591
7592
7593
7594
7595
7596
7597
7598
7599
7600
7601
7602
7603
7604
7605
7606
7607
7608
7609
7610
7611
7612
7613
7614
7615
7616
7617
7618
7619
7620
7621
7622
7623
7624
7625
7626
7627
7628
7629
7630
7631
7632
7633
7634
7635
7636
7637
7638
7639
7640
7641
7642
7643
7644
7645
7646
7647
7648
7649
7650
7651
7652
7653
7654
7655
7656
7657
7658
7659
7660
7661
7662
7663
7664
7665
7666
7667
7668
7669
7670
7671
7672
7673
7674
7675
7676
7677
7678
7679
7680
7681
7682
7683
7684
7685
7686
7687
7688
7689
7690
7691
7692
7693
7694
7695
7696
7697
7698
7699
7700
7701
7702
7703
7704
7705
7706
7707
7708
7709
7710
7711
7712
7713
7714
7715
7716
7717
7718
7719
7720
7721
7722
7723
7724
7725
7726
7727
7728
7729
7730
7731
7732
7733
7734
7735
7736
7737
7738
7739
7740
7741
7742
7743
7744
7745
7746
7747
7748
7749
7750
7751
7752
7753
7754
7755
7756
7757
7758
7759
7760
7761
7762
7763
7764
7765
7766
7767
7768
7769
7770
7771
7772
7773
7774
7775
7776
7777
7778
7779
7780
7781
7782
7783
7784
7785
7786
7787
7788
7789
7790
7791
7792
7793
7794
7795
7796
7797
7798
7799
7800
7801
7802
7803
7804
7805
7806
7807
7808
7809
7810
7811
7812
7813
7814
7815
7816
7817
7818
7819
7820
7821
7822
7823
7824
7825
7826
7827
7828
7829
7830
7831
7832
7833
7834
7835
7836
7837
7838
7839
7840
7841
7842
7843
7844
7845
7846
7847
7848
7849
7850
7851
7852
7853
7854
7855
7856
7857
7858
7859
7860
7861
7862
7863
7864
7865
7866
7867
7868
7869
7870
7871
7872
7873
7874
7875
7876
7877
7878
7879
7880
7881
7882
7883
7884
7885
7886
7887
7888
7889
7890
7891
7892
7893
7894
7895
7896
7897
7898
7899
7900
7901
7902
7903
7904
7905
7906
7907
7908
7909
7910
7911
7912
7913
7914
7915
7916
7917
7918
7919
7920
7921
7922
7923
7924
7925
7926
7927
7928
7929
7930
7931
7932
7933
7934
7935
7936
7937
7938
7939
7940
7941
7942
7943
7944
7945
7946
7947
7948
7949
7950
7951
7952
7953
7954
7955
7956
7957
7958
7959
7960
7961
7962
7963
7964
7965
7966
7967
7968
7969
7970
7971
7972
7973
7974
7975
7976
7977
7978
7979
7980
7981
7982
7983
7984
7985
7986
7987
7988
7989
7990
7991
7992
7993
7994
7995
7996
7997
7998
7999
8000
8001
8002
8003
8004
8005
8006
8007
8008
8009
8010
8011
8012
8013
8014
8015
8016
8017
8018
8019
8020
8021
8022
8023
8024
8025
8026
8027
8028
8029
8030
8031
8032
8033
8034
8035
8036
8037
8038
8039
8040
8041
8042
8043
8044
8045
8046
8047
8048
8049
8050
8051
8052
8053
8054
8055
8056
8057
8058
8059
8060
8061
8062
8063
8064
8065
8066
8067
8068
8069
8070
8071
8072
8073
8074
8075
8076
8077
8078
8079
8080
8081
8082
8083
8084
8085
8086
8087
8088
8089
8090
8091
8092
8093
8094
8095
8096
8097
8098
8099
8100
8101
8102
8103
8104
8105
8106
8107
8108
8109
8110
8111
8112
8113
8114
8115
8116
8117
8118
8119
8120
8121
8122
8123
8124
8125
8126
8127
8128
8129
8130
8131
8132
8133
8134
8135
8136
8137
8138
8139
8140
8141
8142
8143
8144
8145
8146
8147
8148
8149
8150
8151
8152
8153
8154
8155
8156
8157
8158
8159
8160
8161
8162
8163
8164
8165
8166
8167
8168
8169
8170
8171
8172
8173
8174
8175
8176
8177
8178
8179
8180
8181
8182
8183
8184
8185
8186
8187
8188
8189
8190
8191
8192
8193
8194
8195
8196
8197
8198
8199
8200
8201
8202
8203
8204
8205
8206
8207
8208
8209
8210
8211
8212
8213
8214
8215
8216
8217
8218
8219
8220
8221
8222
8223
8224
8225
8226
8227
8228
8229
8230
8231
8232
8233
8234
8235
8236
8237
8238
8239
8240
8241
8242
8243
8244
8245
8246
8247
8248
8249
8250
8251
8252
8253
8254
8255
8256
8257
8258
8259
8260
8261
8262
8263
8264
8265
8266
8267
8268
8269
8270
8271
8272
8273
8274
8275
8276
8277
8278
8279
8280
8281
8282
8283
8284
8285
8286
8287
8288
8289
8290
8291
8292
8293
8294
8295
8296
8297
8298
8299
8300
8301
8302
8303
8304
8305
8306
8307
8308
8309
8310
8311
8312
8313
8314
8315
8316
8317
8318
8319
8320
8321
8322
8323
8324
8325
8326
8327
8328
8329
8330
8331
8332
8333
8334
8335
8336
8337
8338
8339
8340
8341
8342
8343
8344
8345
8346
8347
8348
8349
8350
8351
8352
8353
8354
8355
8356
8357
8358
8359
8360
8361
8362
8363
8364
8365
8366
8367
8368
8369
8370
8371
8372
8373
8374
8375
8376
8377
8378
8379
8380
8381
8382
8383
8384
8385
8386
8387
8388
8389
8390
8391
8392
8393
8394
8395
8396
8397
8398
8399
8400
8401
8402
8403
8404
8405
8406
8407
8408
8409
8410
8411
8412
8413
8414
8415
8416
8417
8418
8419
8420
8421
8422
8423
8424
8425
8426
8427
8428
8429
8430
8431
8432
8433
8434
8435
8436
8437
8438
8439
8440
8441
8442
8443
8444
8445
8446
8447
8448
8449
8450
8451
8452
8453
8454
8455
8456
8457
8458
8459
8460
8461
8462
8463
8464
8465
8466
8467
8468
8469
8470
8471
8472
8473
8474
8475
8476
8477
8478
8479
8480
8481
8482
8483
8484
8485
8486
8487
8488
8489
8490
8491
8492
8493
8494
8495
8496
8497
8498
8499
8500
8501
8502
8503
8504
8505
8506
8507
8508
8509
8510
8511
8512
8513
8514
8515
8516
8517
8518
8519
8520
8521
8522
8523
8524
8525
8526
8527
8528
8529
8530
8531
8532
8533
8534
8535
8536
8537
8538
8539
8540
8541
8542
8543
8544
8545
8546
8547
8548
8549
8550
8551
8552
8553
8554
8555
8556
8557
8558
8559
8560
8561
8562
8563
8564
8565
8566
8567
8568
8569
8570
8571
8572
8573
8574
8575
8576
8577
8578
8579
8580
8581
8582
8583
8584
8585
8586
8587
8588
8589
8590
8591
8592
8593
8594
8595
8596
8597
8598
8599
8600
8601
8602
8603
8604
8605
8606
8607
8608
8609
8610
8611
8612
8613
8614
8615
8616
8617
8618
8619
8620
8621
8622
8623
8624
8625
8626
8627
8628
8629
8630
8631
8632
8633
8634
8635
8636
8637
8638
8639
8640
8641
8642
8643
8644
8645
8646
8647
8648
8649
8650
8651
8652
8653
8654
8655
8656
8657
8658
8659
8660
8661
8662
8663
8664
8665
8666
8667
8668
8669
8670
8671
8672
8673
8674
8675
8676
8677
8678
8679
8680
8681
8682
8683
8684
8685
8686
8687
8688
8689
8690
8691
8692
8693
8694
8695
8696
8697
8698
8699
8700
8701
8702
8703
8704
8705
8706
8707
8708
8709
8710
8711
8712
8713
8714
8715
8716
8717
8718
8719
8720
8721
8722
8723
8724
8725
8726
8727
8728
8729
8730
8731
8732
8733
8734
8735
8736
8737
8738
8739
8740
8741
8742
8743
8744
8745
8746
8747
8748
8749
8750
8751
8752
8753
8754
8755
8756
8757
8758
8759
8760
8761
8762
8763
8764
8765
8766
8767
8768
8769
8770
8771
8772
8773
8774
8775
8776
8777
8778
8779
8780
8781
8782
8783
8784
8785
8786
8787
8788
8789
8790
8791
8792
8793
8794
8795
8796
8797
8798
8799
8800
8801
8802
8803
8804
8805
8806
8807
8808
8809
8810
8811
8812
8813
8814
8815
8816
8817
8818
8819
8820
8821
8822
8823
8824
8825
8826
8827
8828
8829
8830
8831
8832
8833
8834
8835
8836
8837
8838
8839
8840
8841
8842
8843
8844
8845
8846
8847
8848
8849
8850
8851
8852
8853
8854
8855
8856
8857
8858
8859
8860
8861
8862
8863
8864
8865
8866
8867
8868
8869
8870
8871
8872
8873
8874
8875
8876
8877
8878
8879
8880
8881
8882
8883
8884
8885
8886
8887
8888
8889
8890
8891
8892
8893
8894
8895
8896
8897
8898
8899
8900
8901
8902
8903
8904
8905
8906
8907
8908
8909
8910
8911
8912
8913
8914
8915
8916
8917
8918
8919
8920
8921
8922
8923
8924
8925
8926
8927
8928
8929
8930
8931
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Linux MegaRAID driver for SAS based RAID controllers
 *
 *  Copyright (c) 2003-2013  LSI Corporation
 *  Copyright (c) 2013-2016  Avago Technologies
 *  Copyright (c) 2016-2018  Broadcom Inc.
 *
 *  Authors: Broadcom Inc.
 *           Sreenivas Bagalkote
 *           Sumant Patro
 *           Bo Yang
 *           Adam Radford
 *           Kashyap Desai <kashyap.desai@broadcom.com>
 *           Sumit Saxena <sumit.saxena@broadcom.com>
 *
 *  Send feedback to: megaraidlinux.pdl@broadcom.com
 */

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/list.h>
#include <linux/moduleparam.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/uio.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <asm/unaligned.h>
#include <linux/fs.h>
#include <linux/compat.h>
#include <linux/blkdev.h>
#include <linux/mutex.h>
#include <linux/poll.h>
#include <linux/vmalloc.h>
#include <linux/irq_poll.h>

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_dbg.h>
#include "megaraid_sas_fusion.h"
#include "megaraid_sas.h"

/*
 * Number of sectors per IO command
 * Will be set in megasas_init_mfi if user does not provide
 */
static unsigned int max_sectors;
module_param_named(max_sectors, max_sectors, int, 0444);
MODULE_PARM_DESC(max_sectors,
	"Maximum number of sectors per IO command");

static int msix_disable;
module_param(msix_disable, int, 0444);
MODULE_PARM_DESC(msix_disable, "Disable MSI-X interrupt handling. Default: 0");

static unsigned int msix_vectors;
module_param(msix_vectors, int, 0444);
MODULE_PARM_DESC(msix_vectors, "MSI-X max vector count. Default: Set by FW");

static int allow_vf_ioctls;
module_param(allow_vf_ioctls, int, 0444);
MODULE_PARM_DESC(allow_vf_ioctls, "Allow ioctls in SR-IOV VF mode. Default: 0");

static unsigned int throttlequeuedepth = MEGASAS_THROTTLE_QUEUE_DEPTH;
module_param(throttlequeuedepth, int, 0444);
MODULE_PARM_DESC(throttlequeuedepth,
	"Adapter queue depth when throttled due to I/O timeout. Default: 16");

unsigned int resetwaittime = MEGASAS_RESET_WAIT_TIME;
module_param(resetwaittime, int, 0444);
MODULE_PARM_DESC(resetwaittime, "Wait time in (1-180s) after I/O timeout before resetting adapter. Default: 180s");

int smp_affinity_enable = 1;
module_param(smp_affinity_enable, int, 0444);
MODULE_PARM_DESC(smp_affinity_enable, "SMP affinity feature enable/disable Default: enable(1)");

int rdpq_enable = 1;
module_param(rdpq_enable, int, 0444);
MODULE_PARM_DESC(rdpq_enable, "Allocate reply queue in chunks for large queue depth enable/disable Default: enable(1)");

unsigned int dual_qdepth_disable;
module_param(dual_qdepth_disable, int, 0444);
MODULE_PARM_DESC(dual_qdepth_disable, "Disable dual queue depth feature. Default: 0");

unsigned int scmd_timeout = MEGASAS_DEFAULT_CMD_TIMEOUT;
module_param(scmd_timeout, int, 0444);
MODULE_PARM_DESC(scmd_timeout, "scsi command timeout (10-90s), default 90s. See megasas_reset_timer.");

int perf_mode = -1;
module_param(perf_mode, int, 0444);
MODULE_PARM_DESC(perf_mode, "Performance mode (only for Aero adapters), options:\n\t\t"
		"0 - balanced: High iops and low latency queues are allocated &\n\t\t"
		"interrupt coalescing is enabled only on high iops queues\n\t\t"
		"1 - iops: High iops queues are not allocated &\n\t\t"
		"interrupt coalescing is enabled on all queues\n\t\t"
		"2 - latency: High iops queues are not allocated &\n\t\t"
		"interrupt coalescing is disabled on all queues\n\t\t"
		"default mode is 'balanced'"
		);

int event_log_level = MFI_EVT_CLASS_CRITICAL;
module_param(event_log_level, int, 0644);
MODULE_PARM_DESC(event_log_level, "Asynchronous event logging level- range is: -2(CLASS_DEBUG) to 4(CLASS_DEAD), Default: 2(CLASS_CRITICAL)");

unsigned int enable_sdev_max_qd;
module_param(enable_sdev_max_qd, int, 0444);
MODULE_PARM_DESC(enable_sdev_max_qd, "Enable sdev max qd as can_queue. Default: 0");

MODULE_LICENSE("GPL");
MODULE_VERSION(MEGASAS_VERSION);
MODULE_AUTHOR("megaraidlinux.pdl@broadcom.com");
MODULE_DESCRIPTION("Broadcom MegaRAID SAS Driver");

int megasas_transition_to_ready(struct megasas_instance *instance, int ocr);
static int megasas_get_pd_list(struct megasas_instance *instance);
static int megasas_ld_list_query(struct megasas_instance *instance,
				 u8 query_type);
static int megasas_issue_init_mfi(struct megasas_instance *instance);
static int megasas_register_aen(struct megasas_instance *instance,
				u32 seq_num, u32 class_locale_word);
static void megasas_get_pd_info(struct megasas_instance *instance,
				struct scsi_device *sdev);

/*
 * PCI ID table for all supported controllers
 */
static struct pci_device_id megasas_pci_table[] = {

	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1064R)},
	/* xscale IOP */
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078R)},
	/* ppc IOP */
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078DE)},
	/* ppc IOP */
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078GEN2)},
	/* gen2*/
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0079GEN2)},
	/* gen2*/
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0073SKINNY)},
	/* skinny*/
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0071SKINNY)},
	/* skinny*/
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VERDE_ZCR)},
	/* xscale IOP, vega */
	{PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)},
	/* xscale IOP */
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FUSION)},
	/* Fusion */
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_PLASMA)},
	/* Plasma */
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_INVADER)},
	/* Invader */
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FURY)},
	/* Fury */
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_INTRUDER)},
	/* Intruder */
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_INTRUDER_24)},
	/* Intruder 24 port*/
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_CUTLASS_52)},
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_CUTLASS_53)},
	/* VENTURA */
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VENTURA)},
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_CRUSADER)},
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_HARPOON)},
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_TOMCAT)},
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VENTURA_4PORT)},
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_CRUSADER_4PORT)},
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_AERO_10E1)},
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_AERO_10E2)},
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_AERO_10E5)},
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_AERO_10E6)},
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_AERO_10E0)},
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_AERO_10E3)},
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_AERO_10E4)},
	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_AERO_10E7)},
	{}
};

MODULE_DEVICE_TABLE(pci, megasas_pci_table);

static int megasas_mgmt_majorno;
struct megasas_mgmt_info megasas_mgmt_info;
static struct fasync_struct *megasas_async_queue;
static DEFINE_MUTEX(megasas_async_queue_mutex);

static int megasas_poll_wait_aen;
static DECLARE_WAIT_QUEUE_HEAD(megasas_poll_wait);
static u32 support_poll_for_event;
u32 megasas_dbg_lvl;
static u32 support_device_change;
static bool support_nvme_encapsulation;
static bool support_pci_lane_margining;

/* define lock for aen poll */
spinlock_t poll_aen_lock;

extern struct dentry *megasas_debugfs_root;
extern void megasas_init_debugfs(void);
extern void megasas_exit_debugfs(void);
extern void megasas_setup_debugfs(struct megasas_instance *instance);
extern void megasas_destroy_debugfs(struct megasas_instance *instance);

void
megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
		     u8 alt_status);
static u32
megasas_read_fw_status_reg_gen2(struct megasas_instance *instance);
static int
megasas_adp_reset_gen2(struct megasas_instance *instance,
		       struct megasas_register_set __iomem *reg_set);
static irqreturn_t megasas_isr(int irq, void *devp);
static u32
megasas_init_adapter_mfi(struct megasas_instance *instance);
u32
megasas_build_and_issue_cmd(struct megasas_instance *instance,
			    struct scsi_cmnd *scmd);
static void megasas_complete_cmd_dpc(unsigned long instance_addr);
int
wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
	int seconds);
void megasas_fusion_ocr_wq(struct work_struct *work);
static int megasas_get_ld_vf_affiliation(struct megasas_instance *instance,
					 int initial);
static int
megasas_set_dma_mask(struct megasas_instance *instance);
static int
megasas_alloc_ctrl_mem(struct megasas_instance *instance);
static inline void
megasas_free_ctrl_mem(struct megasas_instance *instance);
static inline int
megasas_alloc_ctrl_dma_buffers(struct megasas_instance *instance);
static inline void
megasas_free_ctrl_dma_buffers(struct megasas_instance *instance);
static inline void
megasas_init_ctrl_params(struct megasas_instance *instance);

u32 megasas_readl(struct megasas_instance *instance,
		  const volatile void __iomem *addr)
{
	u32 i = 0, ret_val;
	/*
	 * Due to a HW errata in Aero controllers, reads to certain
	 * Fusion registers could intermittently return all zeroes.
	 * This behavior is transient in nature and subsequent reads will
	 * return valid value. As a workaround in driver, retry readl for
	 * upto three times until a non-zero value is read.
	 */
	if (instance->adapter_type == AERO_SERIES) {
		do {
			ret_val = readl(addr);
			i++;
		} while (ret_val == 0 && i < 3);
		return ret_val;
	} else {
		return readl(addr);
	}
}

/**
 * megasas_set_dma_settings -	Populate DMA address, length and flags for DCMDs
 * @instance:			Adapter soft state
 * @dcmd:			DCMD frame inside MFI command
 * @dma_addr:			DMA address of buffer to be passed to FW
 * @dma_len:			Length of DMA buffer to be passed to FW
 * @return:			void
 */
void megasas_set_dma_settings(struct megasas_instance *instance,
			      struct megasas_dcmd_frame *dcmd,
			      dma_addr_t dma_addr, u32 dma_len)
{
	if (instance->consistent_mask_64bit) {
		dcmd->sgl.sge64[0].phys_addr = cpu_to_le64(dma_addr);
		dcmd->sgl.sge64[0].length = cpu_to_le32(dma_len);
		dcmd->flags = cpu_to_le16(dcmd->flags | MFI_FRAME_SGL64);

	} else {
		dcmd->sgl.sge32[0].phys_addr =
				cpu_to_le32(lower_32_bits(dma_addr));
		dcmd->sgl.sge32[0].length = cpu_to_le32(dma_len);
		dcmd->flags = cpu_to_le16(dcmd->flags);
	}
}

static void
megasas_issue_dcmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
{
	instance->instancet->fire_cmd(instance,
		cmd->frame_phys_addr, 0, instance->reg_set);
	return;
}

/**
 * megasas_get_cmd -	Get a command from the free pool
 * @instance:		Adapter soft state
 *
 * Returns a free command from the pool
 */
struct megasas_cmd *megasas_get_cmd(struct megasas_instance
						  *instance)
{
	unsigned long flags;
	struct megasas_cmd *cmd = NULL;

	spin_lock_irqsave(&instance->mfi_pool_lock, flags);

	if (!list_empty(&instance->cmd_pool)) {
		cmd = list_entry((&instance->cmd_pool)->next,
				 struct megasas_cmd, list);
		list_del_init(&cmd->list);
	} else {
		dev_err(&instance->pdev->dev, "Command pool empty!\n");
	}

	spin_unlock_irqrestore(&instance->mfi_pool_lock, flags);
	return cmd;
}

/**
 * megasas_return_cmd -	Return a cmd to free command pool
 * @instance:		Adapter soft state
 * @cmd:		Command packet to be returned to free command pool
 */
void
megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
{
	unsigned long flags;
	u32 blk_tags;
	struct megasas_cmd_fusion *cmd_fusion;
	struct fusion_context *fusion = instance->ctrl_context;

	/* This flag is used only for fusion adapter.
	 * Wait for Interrupt for Polled mode DCMD
	 */
	if (cmd->flags & DRV_DCMD_POLLED_MODE)
		return;

	spin_lock_irqsave(&instance->mfi_pool_lock, flags);

	if (fusion) {
		blk_tags = instance->max_scsi_cmds + cmd->index;
		cmd_fusion = fusion->cmd_list[blk_tags];
		megasas_return_cmd_fusion(instance, cmd_fusion);
	}
	cmd->scmd = NULL;
	cmd->frame_count = 0;
	cmd->flags = 0;
	memset(cmd->frame, 0, instance->mfi_frame_size);
	cmd->frame->io.context = cpu_to_le32(cmd->index);
	if (!fusion && reset_devices)
		cmd->frame->hdr.cmd = MFI_CMD_INVALID;
	list_add(&cmd->list, (&instance->cmd_pool)->next);

	spin_unlock_irqrestore(&instance->mfi_pool_lock, flags);

}

static const char *
format_timestamp(uint32_t timestamp)
{
	static char buffer[32];

	if ((timestamp & 0xff000000) == 0xff000000)
		snprintf(buffer, sizeof(buffer), "boot + %us", timestamp &
		0x00ffffff);
	else
		snprintf(buffer, sizeof(buffer), "%us", timestamp);
	return buffer;
}

static const char *
format_class(int8_t class)
{
	static char buffer[6];

	switch (class) {
	case MFI_EVT_CLASS_DEBUG:
		return "debug";
	case MFI_EVT_CLASS_PROGRESS:
		return "progress";
	case MFI_EVT_CLASS_INFO:
		return "info";
	case MFI_EVT_CLASS_WARNING:
		return "WARN";
	case MFI_EVT_CLASS_CRITICAL:
		return "CRIT";
	case MFI_EVT_CLASS_FATAL:
		return "FATAL";
	case MFI_EVT_CLASS_DEAD:
		return "DEAD";
	default:
		snprintf(buffer, sizeof(buffer), "%d", class);
		return buffer;
	}
}

/**
  * megasas_decode_evt: Decode FW AEN event and print critical event
  * for information.
  * @instance:			Adapter soft state
  */
static void
megasas_decode_evt(struct megasas_instance *instance)
{
	struct megasas_evt_detail *evt_detail = instance->evt_detail;
	union megasas_evt_class_locale class_locale;
	class_locale.word = le32_to_cpu(evt_detail->cl.word);

	if ((event_log_level < MFI_EVT_CLASS_DEBUG) ||
	    (event_log_level > MFI_EVT_CLASS_DEAD)) {
		printk(KERN_WARNING "megaraid_sas: provided event log level is out of range, setting it to default 2(CLASS_CRITICAL), permissible range is: -2 to 4\n");
		event_log_level = MFI_EVT_CLASS_CRITICAL;
	}

	if (class_locale.members.class >= event_log_level)
		dev_info(&instance->pdev->dev, "%d (%s/0x%04x/%s) - %s\n",
			le32_to_cpu(evt_detail->seq_num),
			format_timestamp(le32_to_cpu(evt_detail->time_stamp)),
			(class_locale.members.locale),
			format_class(class_locale.members.class),
			evt_detail->description);
}

/**
*	The following functions are defined for xscale
*	(deviceid : 1064R, PERC5) controllers
*/

/**
 * megasas_enable_intr_xscale -	Enables interrupts
 * @regs:			MFI register set
 */
static inline void
megasas_enable_intr_xscale(struct megasas_instance *instance)
{
	struct megasas_register_set __iomem *regs;

	regs = instance->reg_set;
	writel(0, &(regs)->outbound_intr_mask);

	/* Dummy readl to force pci flush */
	readl(&regs->outbound_intr_mask);
}

/**
 * megasas_disable_intr_xscale -Disables interrupt
 * @regs:			MFI register set
 */
static inline void
megasas_disable_intr_xscale(struct megasas_instance *instance)
{
	struct megasas_register_set __iomem *regs;
	u32 mask = 0x1f;

	regs = instance->reg_set;
	writel(mask, &regs->outbound_intr_mask);
	/* Dummy readl to force pci flush */
	readl(&regs->outbound_intr_mask);
}

/**
 * megasas_read_fw_status_reg_xscale - returns the current FW status value
 * @regs:			MFI register set
 */
static u32
megasas_read_fw_status_reg_xscale(struct megasas_instance *instance)
{
	return readl(&instance->reg_set->outbound_msg_0);
}
/**
 * megasas_clear_interrupt_xscale -	Check & clear interrupt
 * @regs:				MFI register set
 */
static int
megasas_clear_intr_xscale(struct megasas_instance *instance)
{
	u32 status;
	u32 mfiStatus = 0;
	struct megasas_register_set __iomem *regs;
	regs = instance->reg_set;

	/*
	 * Check if it is our interrupt
	 */
	status = readl(&regs->outbound_intr_status);

	if (status & MFI_OB_INTR_STATUS_MASK)
		mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
	if (status & MFI_XSCALE_OMR0_CHANGE_INTERRUPT)
		mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;

	/*
	 * Clear the interrupt by writing back the same value
	 */
	if (mfiStatus)
		writel(status, &regs->outbound_intr_status);

	/* Dummy readl to force pci flush */
	readl(&regs->outbound_intr_status);

	return mfiStatus;
}

/**
 * megasas_fire_cmd_xscale -	Sends command to the FW
 * @frame_phys_addr :		Physical address of cmd
 * @frame_count :		Number of frames for the command
 * @regs :			MFI register set
 */
static inline void
megasas_fire_cmd_xscale(struct megasas_instance *instance,
		dma_addr_t frame_phys_addr,
		u32 frame_count,
		struct megasas_register_set __iomem *regs)
{
	unsigned long flags;

	spin_lock_irqsave(&instance->hba_lock, flags);
	writel((frame_phys_addr >> 3)|(frame_count),
	       &(regs)->inbound_queue_port);
	spin_unlock_irqrestore(&instance->hba_lock, flags);
}

/**
 * megasas_adp_reset_xscale -  For controller reset
 * @regs:                              MFI register set
 */
static int
megasas_adp_reset_xscale(struct megasas_instance *instance,
	struct megasas_register_set __iomem *regs)
{
	u32 i;
	u32 pcidata;

	writel(MFI_ADP_RESET, &regs->inbound_doorbell);

	for (i = 0; i < 3; i++)
		msleep(1000); /* sleep for 3 secs */
	pcidata  = 0;
	pci_read_config_dword(instance->pdev, MFI_1068_PCSR_OFFSET, &pcidata);
	dev_notice(&instance->pdev->dev, "pcidata = %x\n", pcidata);
	if (pcidata & 0x2) {
		dev_notice(&instance->pdev->dev, "mfi 1068 offset read=%x\n", pcidata);
		pcidata &= ~0x2;
		pci_write_config_dword(instance->pdev,
				MFI_1068_PCSR_OFFSET, pcidata);

		for (i = 0; i < 2; i++)
			msleep(1000); /* need to wait 2 secs again */

		pcidata  = 0;
		pci_read_config_dword(instance->pdev,
				MFI_1068_FW_HANDSHAKE_OFFSET, &pcidata);
		dev_notice(&instance->pdev->dev, "1068 offset handshake read=%x\n", pcidata);
		if ((pcidata & 0xffff0000) == MFI_1068_FW_READY) {
			dev_notice(&instance->pdev->dev, "1068 offset pcidt=%x\n", pcidata);
			pcidata = 0;
			pci_write_config_dword(instance->pdev,
				MFI_1068_FW_HANDSHAKE_OFFSET, pcidata);
		}
	}
	return 0;
}

/**
 * megasas_check_reset_xscale -	For controller reset check
 * @regs:				MFI register set
 */
static int
megasas_check_reset_xscale(struct megasas_instance *instance,
		struct megasas_register_set __iomem *regs)
{
	if ((atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) &&
	    (le32_to_cpu(*instance->consumer) ==
		MEGASAS_ADPRESET_INPROG_SIGN))
		return 1;
	return 0;
}

static struct megasas_instance_template megasas_instance_template_xscale = {

	.fire_cmd = megasas_fire_cmd_xscale,
	.enable_intr = megasas_enable_intr_xscale,
	.disable_intr = megasas_disable_intr_xscale,
	.clear_intr = megasas_clear_intr_xscale,
	.read_fw_status_reg = megasas_read_fw_status_reg_xscale,
	.adp_reset = megasas_adp_reset_xscale,
	.check_reset = megasas_check_reset_xscale,
	.service_isr = megasas_isr,
	.tasklet = megasas_complete_cmd_dpc,
	.init_adapter = megasas_init_adapter_mfi,
	.build_and_issue_cmd = megasas_build_and_issue_cmd,
	.issue_dcmd = megasas_issue_dcmd,
};

/**
*	This is the end of set of functions & definitions specific
*	to xscale (deviceid : 1064R, PERC5) controllers
*/

/**
*	The following functions are defined for ppc (deviceid : 0x60)
*	controllers
*/

/**
 * megasas_enable_intr_ppc -	Enables interrupts
 * @regs:			MFI register set
 */
static inline void
megasas_enable_intr_ppc(struct megasas_instance *instance)
{
	struct megasas_register_set __iomem *regs;

	regs = instance->reg_set;
	writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);

	writel(~0x80000000, &(regs)->outbound_intr_mask);

	/* Dummy readl to force pci flush */
	readl(&regs->outbound_intr_mask);
}

/**
 * megasas_disable_intr_ppc -	Disable interrupt
 * @regs:			MFI register set
 */
static inline void
megasas_disable_intr_ppc(struct megasas_instance *instance)
{
	struct megasas_register_set __iomem *regs;
	u32 mask = 0xFFFFFFFF;

	regs = instance->reg_set;
	writel(mask, &regs->outbound_intr_mask);
	/* Dummy readl to force pci flush */
	readl(&regs->outbound_intr_mask);
}

/**
 * megasas_read_fw_status_reg_ppc - returns the current FW status value
 * @regs:			MFI register set
 */
static u32
megasas_read_fw_status_reg_ppc(struct megasas_instance *instance)
{
	return readl(&instance->reg_set->outbound_scratch_pad_0);
}

/**
 * megasas_clear_interrupt_ppc -	Check & clear interrupt
 * @regs:				MFI register set
 */
static int
megasas_clear_intr_ppc(struct megasas_instance *instance)
{
	u32 status, mfiStatus = 0;
	struct megasas_register_set __iomem *regs;
	regs = instance->reg_set;

	/*
	 * Check if it is our interrupt
	 */
	status = readl(&regs->outbound_intr_status);

	if (status & MFI_REPLY_1078_MESSAGE_INTERRUPT)
		mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;

	if (status & MFI_G2_OUTBOUND_DOORBELL_CHANGE_INTERRUPT)
		mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;

	/*
	 * Clear the interrupt by writing back the same value
	 */
	writel(status, &regs->outbound_doorbell_clear);

	/* Dummy readl to force pci flush */
	readl(&regs->outbound_doorbell_clear);

	return mfiStatus;
}

/**
 * megasas_fire_cmd_ppc -	Sends command to the FW
 * @frame_phys_addr :		Physical address of cmd
 * @frame_count :		Number of frames for the command
 * @regs :			MFI register set
 */
static inline void
megasas_fire_cmd_ppc(struct megasas_instance *instance,
		dma_addr_t frame_phys_addr,
		u32 frame_count,
		struct megasas_register_set __iomem *regs)
{
	unsigned long flags;

	spin_lock_irqsave(&instance->hba_lock, flags);
	writel((frame_phys_addr | (frame_count<<1))|1,
			&(regs)->inbound_queue_port);
	spin_unlock_irqrestore(&instance->hba_lock, flags);
}

/**
 * megasas_check_reset_ppc -	For controller reset check
 * @regs:				MFI register set
 */
static int
megasas_check_reset_ppc(struct megasas_instance *instance,
			struct megasas_register_set __iomem *regs)
{
	if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL)
		return 1;

	return 0;
}

static struct megasas_instance_template megasas_instance_template_ppc = {

	.fire_cmd = megasas_fire_cmd_ppc,
	.enable_intr = megasas_enable_intr_ppc,
	.disable_intr = megasas_disable_intr_ppc,
	.clear_intr = megasas_clear_intr_ppc,
	.read_fw_status_reg = megasas_read_fw_status_reg_ppc,
	.adp_reset = megasas_adp_reset_xscale,
	.check_reset = megasas_check_reset_ppc,
	.service_isr = megasas_isr,
	.tasklet = megasas_complete_cmd_dpc,
	.init_adapter = megasas_init_adapter_mfi,
	.build_and_issue_cmd = megasas_build_and_issue_cmd,
	.issue_dcmd = megasas_issue_dcmd,
};

/**
 * megasas_enable_intr_skinny -	Enables interrupts
 * @regs:			MFI register set
 */
static inline void
megasas_enable_intr_skinny(struct megasas_instance *instance)
{
	struct megasas_register_set __iomem *regs;

	regs = instance->reg_set;
	writel(0xFFFFFFFF, &(regs)->outbound_intr_mask);

	writel(~MFI_SKINNY_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);

	/* Dummy readl to force pci flush */
	readl(&regs->outbound_intr_mask);
}

/**
 * megasas_disable_intr_skinny -	Disables interrupt
 * @regs:			MFI register set
 */
static inline void
megasas_disable_intr_skinny(struct megasas_instance *instance)
{
	struct megasas_register_set __iomem *regs;
	u32 mask = 0xFFFFFFFF;

	regs = instance->reg_set;
	writel(mask, &regs->outbound_intr_mask);
	/* Dummy readl to force pci flush */
	readl(&regs->outbound_intr_mask);
}

/**
 * megasas_read_fw_status_reg_skinny - returns the current FW status value
 * @regs:			MFI register set
 */
static u32
megasas_read_fw_status_reg_skinny(struct megasas_instance *instance)
{
	return readl(&instance->reg_set->outbound_scratch_pad_0);
}

/**
 * megasas_clear_interrupt_skinny -	Check & clear interrupt
 * @regs:				MFI register set
 */
static int
megasas_clear_intr_skinny(struct megasas_instance *instance)
{
	u32 status;
	u32 mfiStatus = 0;
	struct megasas_register_set __iomem *regs;
	regs = instance->reg_set;

	/*
	 * Check if it is our interrupt
	 */
	status = readl(&regs->outbound_intr_status);

	if (!(status & MFI_SKINNY_ENABLE_INTERRUPT_MASK)) {
		return 0;
	}

	/*
	 * Check if it is our interrupt
	 */
	if ((megasas_read_fw_status_reg_skinny(instance) & MFI_STATE_MASK) ==
	    MFI_STATE_FAULT) {
		mfiStatus = MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
	} else
		mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;

	/*
	 * Clear the interrupt by writing back the same value
	 */
	writel(status, &regs->outbound_intr_status);

	/*
	 * dummy read to flush PCI
	 */
	readl(&regs->outbound_intr_status);

	return mfiStatus;
}

/**
 * megasas_fire_cmd_skinny -	Sends command to the FW
 * @frame_phys_addr :		Physical address of cmd
 * @frame_count :		Number of frames for the command
 * @regs :			MFI register set
 */
static inline void
megasas_fire_cmd_skinny(struct megasas_instance *instance,
			dma_addr_t frame_phys_addr,
			u32 frame_count,
			struct megasas_register_set __iomem *regs)
{
	unsigned long flags;

	spin_lock_irqsave(&instance->hba_lock, flags);
	writel(upper_32_bits(frame_phys_addr),
	       &(regs)->inbound_high_queue_port);
	writel((lower_32_bits(frame_phys_addr) | (frame_count<<1))|1,
	       &(regs)->inbound_low_queue_port);
	spin_unlock_irqrestore(&instance->hba_lock, flags);
}

/**
 * megasas_check_reset_skinny -	For controller reset check
 * @regs:				MFI register set
 */
static int
megasas_check_reset_skinny(struct megasas_instance *instance,
				struct megasas_register_set __iomem *regs)
{
	if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL)
		return 1;

	return 0;
}

static struct megasas_instance_template megasas_instance_template_skinny = {

	.fire_cmd = megasas_fire_cmd_skinny,
	.enable_intr = megasas_enable_intr_skinny,
	.disable_intr = megasas_disable_intr_skinny,
	.clear_intr = megasas_clear_intr_skinny,
	.read_fw_status_reg = megasas_read_fw_status_reg_skinny,
	.adp_reset = megasas_adp_reset_gen2,
	.check_reset = megasas_check_reset_skinny,
	.service_isr = megasas_isr,
	.tasklet = megasas_complete_cmd_dpc,
	.init_adapter = megasas_init_adapter_mfi,
	.build_and_issue_cmd = megasas_build_and_issue_cmd,
	.issue_dcmd = megasas_issue_dcmd,
};


/**
*	The following functions are defined for gen2 (deviceid : 0x78 0x79)
*	controllers
*/

/**
 * megasas_enable_intr_gen2 -  Enables interrupts
 * @regs:                      MFI register set
 */
static inline void
megasas_enable_intr_gen2(struct megasas_instance *instance)
{
	struct megasas_register_set __iomem *regs;

	regs = instance->reg_set;
	writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);

	/* write ~0x00000005 (4 & 1) to the intr mask*/
	writel(~MFI_GEN2_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);

	/* Dummy readl to force pci flush */
	readl(&regs->outbound_intr_mask);
}

/**
 * megasas_disable_intr_gen2 - Disables interrupt
 * @regs:                      MFI register set
 */
static inline void
megasas_disable_intr_gen2(struct megasas_instance *instance)
{
	struct megasas_register_set __iomem *regs;
	u32 mask = 0xFFFFFFFF;

	regs = instance->reg_set;
	writel(mask, &regs->outbound_intr_mask);
	/* Dummy readl to force pci flush */
	readl(&regs->outbound_intr_mask);
}

/**
 * megasas_read_fw_status_reg_gen2 - returns the current FW status value
 * @regs:                      MFI register set
 */
static u32
megasas_read_fw_status_reg_gen2(struct megasas_instance *instance)
{
	return readl(&instance->reg_set->outbound_scratch_pad_0);
}

/**
 * megasas_clear_interrupt_gen2 -      Check & clear interrupt
 * @regs:                              MFI register set
 */
static int
megasas_clear_intr_gen2(struct megasas_instance *instance)
{
	u32 status;
	u32 mfiStatus = 0;
	struct megasas_register_set __iomem *regs;
	regs = instance->reg_set;

	/*
	 * Check if it is our interrupt
	 */
	status = readl(&regs->outbound_intr_status);

	if (status & MFI_INTR_FLAG_REPLY_MESSAGE) {
		mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
	}
	if (status & MFI_G2_OUTBOUND_DOORBELL_CHANGE_INTERRUPT) {
		mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
	}

	/*
	 * Clear the interrupt by writing back the same value
	 */
	if (mfiStatus)
		writel(status, &regs->outbound_doorbell_clear);

	/* Dummy readl to force pci flush */
	readl(&regs->outbound_intr_status);

	return mfiStatus;
}
/**
 * megasas_fire_cmd_gen2 -     Sends command to the FW
 * @frame_phys_addr :          Physical address of cmd
 * @frame_count :              Number of frames for the command
 * @regs :                     MFI register set
 */
static inline void
megasas_fire_cmd_gen2(struct megasas_instance *instance,
			dma_addr_t frame_phys_addr,
			u32 frame_count,
			struct megasas_register_set __iomem *regs)
{
	unsigned long flags;

	spin_lock_irqsave(&instance->hba_lock, flags);
	writel((frame_phys_addr | (frame_count<<1))|1,
			&(regs)->inbound_queue_port);
	spin_unlock_irqrestore(&instance->hba_lock, flags);
}

/**
 * megasas_adp_reset_gen2 -	For controller reset
 * @regs:				MFI register set
 */
static int
megasas_adp_reset_gen2(struct megasas_instance *instance,
			struct megasas_register_set __iomem *reg_set)
{
	u32 retry = 0 ;
	u32 HostDiag;
	u32 __iomem *seq_offset = &reg_set->seq_offset;
	u32 __iomem *hostdiag_offset = &reg_set->host_diag;

	if (instance->instancet == &megasas_instance_template_skinny) {
		seq_offset = &reg_set->fusion_seq_offset;
		hostdiag_offset = &reg_set->fusion_host_diag;
	}

	writel(0, seq_offset);
	writel(4, seq_offset);
	writel(0xb, seq_offset);
	writel(2, seq_offset);
	writel(7, seq_offset);
	writel(0xd, seq_offset);

	msleep(1000);

	HostDiag = (u32)readl(hostdiag_offset);

	while (!(HostDiag & DIAG_WRITE_ENABLE)) {
		msleep(100);
		HostDiag = (u32)readl(hostdiag_offset);
		dev_notice(&instance->pdev->dev, "RESETGEN2: retry=%x, hostdiag=%x\n",
					retry, HostDiag);

		if (retry++ >= 100)
			return 1;

	}

	dev_notice(&instance->pdev->dev, "ADP_RESET_GEN2: HostDiag=%x\n", HostDiag);

	writel((HostDiag | DIAG_RESET_ADAPTER), hostdiag_offset);

	ssleep(10);

	HostDiag = (u32)readl(hostdiag_offset);
	while (HostDiag & DIAG_RESET_ADAPTER) {
		msleep(100);
		HostDiag = (u32)readl(hostdiag_offset);
		dev_notice(&instance->pdev->dev, "RESET_GEN2: retry=%x, hostdiag=%x\n",
				retry, HostDiag);

		if (retry++ >= 1000)
			return 1;

	}
	return 0;
}

/**
 * megasas_check_reset_gen2 -	For controller reset check
 * @regs:				MFI register set
 */
static int
megasas_check_reset_gen2(struct megasas_instance *instance,
		struct megasas_register_set __iomem *regs)
{
	if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL)
		return 1;

	return 0;
}

static struct megasas_instance_template megasas_instance_template_gen2 = {

	.fire_cmd = megasas_fire_cmd_gen2,
	.enable_intr = megasas_enable_intr_gen2,
	.disable_intr = megasas_disable_intr_gen2,
	.clear_intr = megasas_clear_intr_gen2,
	.read_fw_status_reg = megasas_read_fw_status_reg_gen2,
	.adp_reset = megasas_adp_reset_gen2,
	.check_reset = megasas_check_reset_gen2,
	.service_isr = megasas_isr,
	.tasklet = megasas_complete_cmd_dpc,
	.init_adapter = megasas_init_adapter_mfi,
	.build_and_issue_cmd = megasas_build_and_issue_cmd,
	.issue_dcmd = megasas_issue_dcmd,
};

/**
*	This is the end of set of functions & definitions
*       specific to gen2 (deviceid : 0x78, 0x79) controllers
*/

/*
 * Template added for TB (Fusion)
 */
extern struct megasas_instance_template megasas_instance_template_fusion;

/**
 * megasas_issue_polled -	Issues a polling command
 * @instance:			Adapter soft state
 * @cmd:			Command packet to be issued
 *
 * For polling, MFI requires the cmd_status to be set to MFI_STAT_INVALID_STATUS before posting.
 */
int
megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
{
	struct megasas_header *frame_hdr = &cmd->frame->hdr;

	frame_hdr->cmd_status = MFI_STAT_INVALID_STATUS;
	frame_hdr->flags |= cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);

	if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) {
		dev_err(&instance->pdev->dev, "Failed from %s %d\n",
			__func__, __LINE__);
		return DCMD_NOT_FIRED;
	}

	instance->instancet->issue_dcmd(instance, cmd);

	return wait_and_poll(instance, cmd, instance->requestorId ?
			MEGASAS_ROUTINE_WAIT_TIME_VF : MFI_IO_TIMEOUT_SECS);
}

/**
 * megasas_issue_blocked_cmd -	Synchronous wrapper around regular FW cmds
 * @instance:			Adapter soft state
 * @cmd:			Command to be issued
 * @timeout:			Timeout in seconds
 *
 * This function waits on an event for the command to be returned from ISR.
 * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
 * Used to issue ioctl commands.
 */
int
megasas_issue_blocked_cmd(struct megasas_instance *instance,
			  struct megasas_cmd *cmd, int timeout)
{
	int ret = 0;
	cmd->cmd_status_drv = MFI_STAT_INVALID_STATUS;

	if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) {
		dev_err(&instance->pdev->dev, "Failed from %s %d\n",
			__func__, __LINE__);
		return DCMD_NOT_FIRED;
	}

	instance->instancet->issue_dcmd(instance, cmd);

	if (timeout) {
		ret = wait_event_timeout(instance->int_cmd_wait_q,
				cmd->cmd_status_drv != MFI_STAT_INVALID_STATUS, timeout * HZ);
		if (!ret) {
			dev_err(&instance->pdev->dev,
				"DCMD(opcode: 0x%x) is timed out, func:%s\n",
				cmd->frame->dcmd.opcode, __func__);
			return DCMD_TIMEOUT;
		}
	} else
		wait_event(instance->int_cmd_wait_q,
				cmd->cmd_status_drv != MFI_STAT_INVALID_STATUS);

	return (cmd->cmd_status_drv == MFI_STAT_OK) ?
		DCMD_SUCCESS : DCMD_FAILED;
}

/**
 * megasas_issue_blocked_abort_cmd -	Aborts previously issued cmd
 * @instance:				Adapter soft state
 * @cmd_to_abort:			Previously issued cmd to be aborted
 * @timeout:				Timeout in seconds
 *
 * MFI firmware can abort previously issued AEN comamnd (automatic event
 * notification). The megasas_issue_blocked_abort_cmd() issues such abort
 * cmd and waits for return status.
 * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
 */
static int
megasas_issue_blocked_abort_cmd(struct megasas_instance *instance,
				struct megasas_cmd *cmd_to_abort, int timeout)
{
	struct megasas_cmd *cmd;
	struct megasas_abort_frame *abort_fr;
	int ret = 0;
	u32 opcode;

	cmd = megasas_get_cmd(instance);

	if (!cmd)
		return -1;

	abort_fr = &cmd->frame->abort;

	/*
	 * Prepare and issue the abort frame
	 */
	abort_fr->cmd = MFI_CMD_ABORT;
	abort_fr->cmd_status = MFI_STAT_INVALID_STATUS;
	abort_fr->flags = cpu_to_le16(0);
	abort_fr->abort_context = cpu_to_le32(cmd_to_abort->index);
	abort_fr->abort_mfi_phys_addr_lo =
		cpu_to_le32(lower_32_bits(cmd_to_abort->frame_phys_addr));
	abort_fr->abort_mfi_phys_addr_hi =
		cpu_to_le32(upper_32_bits(cmd_to_abort->frame_phys_addr));

	cmd->sync_cmd = 1;
	cmd->cmd_status_drv = MFI_STAT_INVALID_STATUS;

	if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) {
		dev_err(&instance->pdev->dev, "Failed from %s %d\n",
			__func__, __LINE__);
		return DCMD_NOT_FIRED;
	}

	instance->instancet->issue_dcmd(instance, cmd);

	if (timeout) {
		ret = wait_event_timeout(instance->abort_cmd_wait_q,
				cmd->cmd_status_drv != MFI_STAT_INVALID_STATUS, timeout * HZ);
		if (!ret) {
			opcode = cmd_to_abort->frame->dcmd.opcode;
			dev_err(&instance->pdev->dev,
				"Abort(to be aborted DCMD opcode: 0x%x) is timed out func:%s\n",
				opcode,  __func__);
			return DCMD_TIMEOUT;
		}
	} else
		wait_event(instance->abort_cmd_wait_q,
				cmd->cmd_status_drv != MFI_STAT_INVALID_STATUS);

	cmd->sync_cmd = 0;

	megasas_return_cmd(instance, cmd);
	return (cmd->cmd_status_drv == MFI_STAT_OK) ?
		DCMD_SUCCESS : DCMD_FAILED;
}

/**
 * megasas_make_sgl32 -	Prepares 32-bit SGL
 * @instance:		Adapter soft state
 * @scp:		SCSI command from the mid-layer
 * @mfi_sgl:		SGL to be filled in
 *
 * If successful, this function returns the number of SG elements. Otherwise,
 * it returnes -1.
 */
static int
megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp,
		   union megasas_sgl *mfi_sgl)
{
	int i;
	int sge_count;
	struct scatterlist *os_sgl;

	sge_count = scsi_dma_map(scp);
	BUG_ON(sge_count < 0);

	if (sge_count) {
		scsi_for_each_sg(scp, os_sgl, sge_count, i) {
			mfi_sgl->sge32[i].length = cpu_to_le32(sg_dma_len(os_sgl));
			mfi_sgl->sge32[i].phys_addr = cpu_to_le32(sg_dma_address(os_sgl));
		}
	}
	return sge_count;
}

/**
 * megasas_make_sgl64 -	Prepares 64-bit SGL
 * @instance:		Adapter soft state
 * @scp:		SCSI command from the mid-layer
 * @mfi_sgl:		SGL to be filled in
 *
 * If successful, this function returns the number of SG elements. Otherwise,
 * it returnes -1.
 */
static int
megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp,
		   union megasas_sgl *mfi_sgl)
{
	int i;
	int sge_count;
	struct scatterlist *os_sgl;

	sge_count = scsi_dma_map(scp);
	BUG_ON(sge_count < 0);

	if (sge_count) {
		scsi_for_each_sg(scp, os_sgl, sge_count, i) {
			mfi_sgl->sge64[i].length = cpu_to_le32(sg_dma_len(os_sgl));
			mfi_sgl->sge64[i].phys_addr = cpu_to_le64(sg_dma_address(os_sgl));
		}
	}
	return sge_count;
}

/**
 * megasas_make_sgl_skinny - Prepares IEEE SGL
 * @instance:           Adapter soft state
 * @scp:                SCSI command from the mid-layer
 * @mfi_sgl:            SGL to be filled in
 *
 * If successful, this function returns the number of SG elements. Otherwise,
 * it returnes -1.
 */
static int
megasas_make_sgl_skinny(struct megasas_instance *instance,
		struct scsi_cmnd *scp, union megasas_sgl *mfi_sgl)
{
	int i;
	int sge_count;
	struct scatterlist *os_sgl;

	sge_count = scsi_dma_map(scp);

	if (sge_count) {
		scsi_for_each_sg(scp, os_sgl, sge_count, i) {
			mfi_sgl->sge_skinny[i].length =
				cpu_to_le32(sg_dma_len(os_sgl));
			mfi_sgl->sge_skinny[i].phys_addr =
				cpu_to_le64(sg_dma_address(os_sgl));
			mfi_sgl->sge_skinny[i].flag = cpu_to_le32(0);
		}
	}
	return sge_count;
}

 /**
 * megasas_get_frame_count - Computes the number of frames
 * @frame_type		: type of frame- io or pthru frame
 * @sge_count		: number of sg elements
 *
 * Returns the number of frames required for numnber of sge's (sge_count)
 */

static u32 megasas_get_frame_count(struct megasas_instance *instance,
			u8 sge_count, u8 frame_type)
{
	int num_cnt;
	int sge_bytes;
	u32 sge_sz;
	u32 frame_count = 0;

	sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
	    sizeof(struct megasas_sge32);

	if (instance->flag_ieee) {
		sge_sz = sizeof(struct megasas_sge_skinny);
	}

	/*
	 * Main frame can contain 2 SGEs for 64-bit SGLs and
	 * 3 SGEs for 32-bit SGLs for ldio &
	 * 1 SGEs for 64-bit SGLs and
	 * 2 SGEs for 32-bit SGLs for pthru frame
	 */
	if (unlikely(frame_type == PTHRU_FRAME)) {
		if (instance->flag_ieee == 1) {
			num_cnt = sge_count - 1;
		} else if (IS_DMA64)
			num_cnt = sge_count - 1;
		else
			num_cnt = sge_count - 2;
	} else {
		if (instance->flag_ieee == 1) {
			num_cnt = sge_count - 1;
		} else if (IS_DMA64)
			num_cnt = sge_count - 2;
		else
			num_cnt = sge_count - 3;
	}

	if (num_cnt > 0) {
		sge_bytes = sge_sz * num_cnt;

		frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
		    ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) ;
	}
	/* Main frame */
	frame_count += 1;

	if (frame_count > 7)
		frame_count = 8;
	return frame_count;
}

/**
 * megasas_build_dcdb -	Prepares a direct cdb (DCDB) command
 * @instance:		Adapter soft state
 * @scp:		SCSI command
 * @cmd:		Command to be prepared in
 *
 * This function prepares CDB commands. These are typcially pass-through
 * commands to the devices.
 */
static int
megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp,
		   struct megasas_cmd *cmd)
{
	u32 is_logical;
	u32 device_id;
	u16 flags = 0;
	struct megasas_pthru_frame *pthru;

	is_logical = MEGASAS_IS_LOGICAL(scp->device);
	device_id = MEGASAS_DEV_INDEX(scp);
	pthru = (struct megasas_pthru_frame *)cmd->frame;

	if (scp->sc_data_direction == DMA_TO_DEVICE)
		flags = MFI_FRAME_DIR_WRITE;
	else if (scp->sc_data_direction == DMA_FROM_DEVICE)
		flags = MFI_FRAME_DIR_READ;
	else if (scp->sc_data_direction == DMA_NONE)
		flags = MFI_FRAME_DIR_NONE;

	if (instance->flag_ieee == 1) {
		flags |= MFI_FRAME_IEEE;
	}

	/*
	 * Prepare the DCDB frame
	 */
	pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO;
	pthru->cmd_status = 0x0;
	pthru->scsi_status = 0x0;
	pthru->target_id = device_id;
	pthru->lun = scp->device->lun;
	pthru->cdb_len = scp->cmd_len;
	pthru->timeout = 0;
	pthru->pad_0 = 0;
	pthru->flags = cpu_to_le16(flags);
	pthru->data_xfer_len = cpu_to_le32(scsi_bufflen(scp));

	memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);

	/*
	 * If the command is for the tape device, set the
	 * pthru timeout to the os layer timeout value.
	 */
	if (scp->device->type == TYPE_TAPE) {
		if ((scp->request->timeout / HZ) > 0xFFFF)
			pthru->timeout = cpu_to_le16(0xFFFF);
		else
			pthru->timeout = cpu_to_le16(scp->request->timeout / HZ);
	}

	/*
	 * Construct SGL
	 */
	if (instance->flag_ieee == 1) {
		pthru->flags |= cpu_to_le16(MFI_FRAME_SGL64);
		pthru->sge_count = megasas_make_sgl_skinny(instance, scp,
						      &pthru->sgl);
	} else if (IS_DMA64) {
		pthru->flags |= cpu_to_le16(MFI_FRAME_SGL64);
		pthru->sge_count = megasas_make_sgl64(instance, scp,
						      &pthru->sgl);
	} else
		pthru->sge_count = megasas_make_sgl32(instance, scp,
						      &pthru->sgl);

	if (pthru->sge_count > instance->max_num_sge) {
		dev_err(&instance->pdev->dev, "DCDB too many SGE NUM=%x\n",
			pthru->sge_count);
		return 0;
	}

	/*
	 * Sense info specific
	 */
	pthru->sense_len = SCSI_SENSE_BUFFERSIZE;
	pthru->sense_buf_phys_addr_hi =
		cpu_to_le32(upper_32_bits(cmd->sense_phys_addr));
	pthru->sense_buf_phys_addr_lo =
		cpu_to_le32(lower_32_bits(cmd->sense_phys_addr));

	/*
	 * Compute the total number of frames this command consumes. FW uses
	 * this number to pull sufficient number of frames from host memory.
	 */
	cmd->frame_count = megasas_get_frame_count(instance, pthru->sge_count,
							PTHRU_FRAME);

	return cmd->frame_count;
}

/**
 * megasas_build_ldio -	Prepares IOs to logical devices
 * @instance:		Adapter soft state
 * @scp:		SCSI command
 * @cmd:		Command to be prepared
 *
 * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
 */
static int
megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
		   struct megasas_cmd *cmd)
{
	u32 device_id;
	u8 sc = scp->cmnd[0];
	u16 flags = 0;
	struct megasas_io_frame *ldio;

	device_id = MEGASAS_DEV_INDEX(scp);
	ldio = (struct megasas_io_frame *)cmd->frame;

	if (scp->sc_data_direction == DMA_TO_DEVICE)
		flags = MFI_FRAME_DIR_WRITE;
	else if (scp->sc_data_direction == DMA_FROM_DEVICE)
		flags = MFI_FRAME_DIR_READ;

	if (instance->flag_ieee == 1) {
		flags |= MFI_FRAME_IEEE;
	}

	/*
	 * Prepare the Logical IO frame: 2nd bit is zero for all read cmds
	 */
	ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ;
	ldio->cmd_status = 0x0;
	ldio->scsi_status = 0x0;
	ldio->target_id = device_id;
	ldio->timeout = 0;
	ldio->reserved_0 = 0;
	ldio->pad_0 = 0;
	ldio->flags = cpu_to_le16(flags);
	ldio->start_lba_hi = 0;
	ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0;

	/*
	 * 6-byte READ(0x08) or WRITE(0x0A) cdb
	 */
	if (scp->cmd_len == 6) {
		ldio->lba_count = cpu_to_le32((u32) scp->cmnd[4]);
		ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[1] << 16) |
						 ((u32) scp->cmnd[2] << 8) |
						 (u32) scp->cmnd[3]);

		ldio->start_lba_lo &= cpu_to_le32(0x1FFFFF);
	}

	/*
	 * 10-byte READ(0x28) or WRITE(0x2A) cdb
	 */
	else if (scp->cmd_len == 10) {
		ldio->lba_count = cpu_to_le32((u32) scp->cmnd[8] |
					      ((u32) scp->cmnd[7] << 8));
		ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[2] << 24) |
						 ((u32) scp->cmnd[3] << 16) |
						 ((u32) scp->cmnd[4] << 8) |
						 (u32) scp->cmnd[5]);
	}

	/*
	 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
	 */
	else if (scp->cmd_len == 12) {
		ldio->lba_count = cpu_to_le32(((u32) scp->cmnd[6] << 24) |
					      ((u32) scp->cmnd[7] << 16) |
					      ((u32) scp->cmnd[8] << 8) |
					      (u32) scp->cmnd[9]);

		ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[2] << 24) |
						 ((u32) scp->cmnd[3] << 16) |
						 ((u32) scp->cmnd[4] << 8) |
						 (u32) scp->cmnd[5]);
	}

	/*
	 * 16-byte READ(0x88) or WRITE(0x8A) cdb
	 */
	else if (scp->cmd_len == 16) {
		ldio->lba_count = cpu_to_le32(((u32) scp->cmnd[10] << 24) |
					      ((u32) scp->cmnd[11] << 16) |
					      ((u32) scp->cmnd[12] << 8) |
					      (u32) scp->cmnd[13]);

		ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[6] << 24) |
						 ((u32) scp->cmnd[7] << 16) |
						 ((u32) scp->cmnd[8] << 8) |
						 (u32) scp->cmnd[9]);

		ldio->start_lba_hi = cpu_to_le32(((u32) scp->cmnd[2] << 24) |
						 ((u32) scp->cmnd[3] << 16) |
						 ((u32) scp->cmnd[4] << 8) |
						 (u32) scp->cmnd[5]);

	}

	/*
	 * Construct SGL
	 */
	if (instance->flag_ieee) {
		ldio->flags |= cpu_to_le16(MFI_FRAME_SGL64);
		ldio->sge_count = megasas_make_sgl_skinny(instance, scp,
					      &ldio->sgl);
	} else if (IS_DMA64) {
		ldio->flags |= cpu_to_le16(MFI_FRAME_SGL64);
		ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl);
	} else
		ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl);

	if (ldio->sge_count > instance->max_num_sge) {
		dev_err(&instance->pdev->dev, "build_ld_io: sge_count = %x\n",
			ldio->sge_count);
		return 0;
	}

	/*
	 * Sense info specific
	 */
	ldio->sense_len = SCSI_SENSE_BUFFERSIZE;
	ldio->sense_buf_phys_addr_hi = 0;
	ldio->sense_buf_phys_addr_lo = cpu_to_le32(cmd->sense_phys_addr);

	/*
	 * Compute the total number of frames this command consumes. FW uses
	 * this number to pull sufficient number of frames from host memory.
	 */
	cmd->frame_count = megasas_get_frame_count(instance,
			ldio->sge_count, IO_FRAME);

	return cmd->frame_count;
}

/**
 * megasas_cmd_type -		Checks if the cmd is for logical drive/sysPD
 *				and whether it's RW or non RW
 * @scmd:			SCSI command
 *
 */
inline int megasas_cmd_type(struct scsi_cmnd *cmd)
{
	int ret;

	switch (cmd->cmnd[0]) {
	case READ_10:
	case WRITE_10:
	case READ_12:
	case WRITE_12:
	case READ_6:
	case WRITE_6:
	case READ_16:
	case WRITE_16:
		ret = (MEGASAS_IS_LOGICAL(cmd->device)) ?
			READ_WRITE_LDIO : READ_WRITE_SYSPDIO;
		break;
	default:
		ret = (MEGASAS_IS_LOGICAL(cmd->device)) ?
			NON_READ_WRITE_LDIO : NON_READ_WRITE_SYSPDIO;
	}
	return ret;
}

 /**
 * megasas_dump_pending_frames -	Dumps the frame address of all pending cmds
 *					in FW
 * @instance:				Adapter soft state
 */
static inline void
megasas_dump_pending_frames(struct megasas_instance *instance)
{
	struct megasas_cmd *cmd;
	int i,n;
	union megasas_sgl *mfi_sgl;
	struct megasas_io_frame *ldio;
	struct megasas_pthru_frame *pthru;
	u32 sgcount;
	u16 max_cmd = instance->max_fw_cmds;

	dev_err(&instance->pdev->dev, "[%d]: Dumping Frame Phys Address of all pending cmds in FW\n",instance->host->host_no);
	dev_err(&instance->pdev->dev, "[%d]: Total OS Pending cmds : %d\n",instance->host->host_no,atomic_read(&instance->fw_outstanding));
	if (IS_DMA64)
		dev_err(&instance->pdev->dev, "[%d]: 64 bit SGLs were sent to FW\n",instance->host->host_no);
	else
		dev_err(&instance->pdev->dev, "[%d]: 32 bit SGLs were sent to FW\n",instance->host->host_no);

	dev_err(&instance->pdev->dev, "[%d]: Pending OS cmds in FW : \n",instance->host->host_no);
	for (i = 0; i < max_cmd; i++) {
		cmd = instance->cmd_list[i];
		if (!cmd->scmd)
			continue;
		dev_err(&instance->pdev->dev, "[%d]: Frame addr :0x%08lx : ",instance->host->host_no,(unsigned long)cmd->frame_phys_addr);
		if (megasas_cmd_type(cmd->scmd) == READ_WRITE_LDIO) {
			ldio = (struct megasas_io_frame *)cmd->frame;
			mfi_sgl = &ldio->sgl;
			sgcount = ldio->sge_count;
			dev_err(&instance->pdev->dev, "[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x,"
			" lba lo : 0x%x, lba_hi : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",
			instance->host->host_no, cmd->frame_count, ldio->cmd, ldio->target_id,
			le32_to_cpu(ldio->start_lba_lo), le32_to_cpu(ldio->start_lba_hi),
			le32_to_cpu(ldio->sense_buf_phys_addr_lo), sgcount);
		} else {
			pthru = (struct megasas_pthru_frame *) cmd->frame;
			mfi_sgl = &pthru->sgl;
			sgcount = pthru->sge_count;
			dev_err(&instance->pdev->dev, "[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x, "
			"lun : 0x%x, cdb_len : 0x%x, data xfer len : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",
			instance->host->host_no, cmd->frame_count, pthru->cmd, pthru->target_id,
			pthru->lun, pthru->cdb_len, le32_to_cpu(pthru->data_xfer_len),
			le32_to_cpu(pthru->sense_buf_phys_addr_lo), sgcount);
		}
		if (megasas_dbg_lvl & MEGASAS_DBG_LVL) {
			for (n = 0; n < sgcount; n++) {
				if (IS_DMA64)
					dev_err(&instance->pdev->dev, "sgl len : 0x%x, sgl addr : 0x%llx\n",
						le32_to_cpu(mfi_sgl->sge64[n].length),
						le64_to_cpu(mfi_sgl->sge64[n].phys_addr));
				else
					dev_err(&instance->pdev->dev, "sgl len : 0x%x, sgl addr : 0x%x\n",
						le32_to_cpu(mfi_sgl->sge32[n].length),
						le32_to_cpu(mfi_sgl->sge32[n].phys_addr));
			}
		}
	} /*for max_cmd*/
	dev_err(&instance->pdev->dev, "[%d]: Pending Internal cmds in FW : \n",instance->host->host_no);
	for (i = 0; i < max_cmd; i++) {

		cmd = instance->cmd_list[i];

		if (cmd->sync_cmd == 1)
			dev_err(&instance->pdev->dev, "0x%08lx : ", (unsigned long)cmd->frame_phys_addr);
	}
	dev_err(&instance->pdev->dev, "[%d]: Dumping Done\n\n",instance->host->host_no);
}

u32
megasas_build_and_issue_cmd(struct megasas_instance *instance,
			    struct scsi_cmnd *scmd)
{
	struct megasas_cmd *cmd;
	u32 frame_count;

	cmd = megasas_get_cmd(instance);
	if (!cmd)
		return SCSI_MLQUEUE_HOST_BUSY;

	/*
	 * Logical drive command
	 */
	if (megasas_cmd_type(scmd) == READ_WRITE_LDIO)
		frame_count = megasas_build_ldio(instance, scmd, cmd);
	else
		frame_count = megasas_build_dcdb(instance, scmd, cmd);

	if (!frame_count)
		goto out_return_cmd;

	cmd->scmd = scmd;
	scmd->SCp.ptr = (char *)cmd;

	/*
	 * Issue the command to the FW
	 */
	atomic_inc(&instance->fw_outstanding);

	instance->instancet->fire_cmd(instance, cmd->frame_phys_addr,
				cmd->frame_count-1, instance->reg_set);

	return 0;
out_return_cmd:
	megasas_return_cmd(instance, cmd);
	return SCSI_MLQUEUE_HOST_BUSY;
}


/**
 * megasas_queue_command -	Queue entry point
 * @scmd:			SCSI command to be queued
 * @done:			Callback entry point
 */
static int
megasas_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
{
	struct megasas_instance *instance;
	struct MR_PRIV_DEVICE *mr_device_priv_data;

	instance = (struct megasas_instance *)
	    scmd->device->host->hostdata;

	if (instance->unload == 1) {
		scmd->result = DID_NO_CONNECT << 16;
		scmd->scsi_done(scmd);
		return 0;
	}

	if (instance->issuepend_done == 0)
		return SCSI_MLQUEUE_HOST_BUSY;


	/* Check for an mpio path and adjust behavior */
	if (atomic_read(&instance->adprecovery) == MEGASAS_ADPRESET_SM_INFAULT) {
		if (megasas_check_mpio_paths(instance, scmd) ==
		    (DID_REQUEUE << 16)) {
			return SCSI_MLQUEUE_HOST_BUSY;
		} else {
			scmd->result = DID_NO_CONNECT << 16;
			scmd->scsi_done(scmd);
			return 0;
		}
	}

	if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) {
		scmd->result = DID_NO_CONNECT << 16;
		scmd->scsi_done(scmd);
		return 0;
	}

	mr_device_priv_data = scmd->device->hostdata;
	if (!mr_device_priv_data) {
		scmd->result = DID_NO_CONNECT << 16;
		scmd->scsi_done(scmd);
		return 0;
	}

	if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL)
		return SCSI_MLQUEUE_HOST_BUSY;

	if (mr_device_priv_data->tm_busy)
		return SCSI_MLQUEUE_DEVICE_BUSY;


	scmd->result = 0;

	if (MEGASAS_IS_LOGICAL(scmd->device) &&
	    (scmd->device->id >= instance->fw_supported_vd_count ||
		scmd->device->lun)) {
		scmd->result = DID_BAD_TARGET << 16;
		goto out_done;
	}

	if ((scmd->cmnd[0] == SYNCHRONIZE_CACHE) &&
	    MEGASAS_IS_LOGICAL(scmd->device) &&
	    (!instance->fw_sync_cache_support)) {
		scmd->result = DID_OK << 16;
		goto out_done;
	}

	return instance->instancet->build_and_issue_cmd(instance, scmd);

 out_done:
	scmd->scsi_done(scmd);
	return 0;
}

static struct megasas_instance *megasas_lookup_instance(u16 host_no)
{
	int i;

	for (i = 0; i < megasas_mgmt_info.max_index; i++) {

		if ((megasas_mgmt_info.instance[i]) &&
		    (megasas_mgmt_info.instance[i]->host->host_no == host_no))
			return megasas_mgmt_info.instance[i];
	}

	return NULL;
}

/*
* megasas_set_dynamic_target_properties -
* Device property set by driver may not be static and it is required to be
* updated after OCR
*
* set tm_capable.
* set dma alignment (only for eedp protection enable vd).
*
* @sdev: OS provided scsi device
*
* Returns void
*/
void megasas_set_dynamic_target_properties(struct scsi_device *sdev,
					   bool is_target_prop)
{
	u16 pd_index = 0, ld;
	u32 device_id;
	struct megasas_instance *instance;
	struct fusion_context *fusion;
	struct MR_PRIV_DEVICE *mr_device_priv_data;
	struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
	struct MR_LD_RAID *raid;
	struct MR_DRV_RAID_MAP_ALL *local_map_ptr;

	instance = megasas_lookup_instance(sdev->host->host_no);
	fusion = instance->ctrl_context;
	mr_device_priv_data = sdev->hostdata;

	if (!fusion || !mr_device_priv_data)
		return;

	if (MEGASAS_IS_LOGICAL(sdev)) {
		device_id = ((sdev->channel % 2) * MEGASAS_MAX_DEV_PER_CHANNEL)
					+ sdev->id;
		local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
		ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
		if (ld >= instance->fw_supported_vd_count)
			return;
		raid = MR_LdRaidGet(ld, local_map_ptr);

		if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER)
		blk_queue_update_dma_alignment(sdev->request_queue, 0x7);

		mr_device_priv_data->is_tm_capable =
			raid->capability.tmCapable;
	} else if (instance->use_seqnum_jbod_fp) {
		pd_index = (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
			sdev->id;
		pd_sync = (void *)fusion->pd_seq_sync
				[(instance->pd_seq_map_id - 1) & 1];
		mr_device_priv_data->is_tm_capable =
			pd_sync->seq[pd_index].capability.tmCapable;
	}

	if (is_target_prop && instance->tgt_prop->reset_tmo) {
		/*
		 * If FW provides a target reset timeout value, driver will use
		 * it. If not set, fallback to default values.
		 */
		mr_device_priv_data->target_reset_tmo =
			min_t(u8, instance->max_reset_tmo,
			      instance->tgt_prop->reset_tmo);
		mr_device_priv_data->task_abort_tmo = instance->task_abort_tmo;
	} else {
		mr_device_priv_data->target_reset_tmo =
						MEGASAS_DEFAULT_TM_TIMEOUT;
		mr_device_priv_data->task_abort_tmo =
						MEGASAS_DEFAULT_TM_TIMEOUT;
	}
}

/*
 * megasas_set_nvme_device_properties -
 * set nomerges=2
 * set virtual page boundary = 4K (current mr_nvme_pg_size is 4K).
 * set maximum io transfer = MDTS of NVME device provided by MR firmware.
 *
 * MR firmware provides value in KB. Caller of this function converts
 * kb into bytes.
 *
 * e.a MDTS=5 means 2^5 * nvme page size. (In case of 4K page size,
 * MR firmware provides value 128 as (32 * 4K) = 128K.
 *
 * @sdev:				scsi device
 * @max_io_size:				maximum io transfer size
 *
 */
static inline void
megasas_set_nvme_device_properties(struct scsi_device *sdev, u32 max_io_size)
{
	struct megasas_instance *instance;
	u32 mr_nvme_pg_size;

	instance = (struct megasas_instance *)sdev->host->hostdata;
	mr_nvme_pg_size = max_t(u32, instance->nvme_page_size,
				MR_DEFAULT_NVME_PAGE_SIZE);

	blk_queue_max_hw_sectors(sdev->request_queue, (max_io_size / 512));

	blk_queue_flag_set(QUEUE_FLAG_NOMERGES, sdev->request_queue);
	blk_queue_virt_boundary(sdev->request_queue, mr_nvme_pg_size - 1);
}

/*
 * megasas_set_fw_assisted_qd -
 * set device queue depth to can_queue
 * set device queue depth to fw assisted qd
 *
 * @sdev:				scsi device
 * @is_target_prop			true, if fw provided target properties.
 */
static void megasas_set_fw_assisted_qd(struct scsi_device *sdev,
						 bool is_target_prop)
{
	u8 interface_type;
	u32 device_qd = MEGASAS_DEFAULT_CMD_PER_LUN;
	u32 tgt_device_qd;
	struct megasas_instance *instance;
	struct MR_PRIV_DEVICE *mr_device_priv_data;

	instance = megasas_lookup_instance(sdev->host->host_no);
	mr_device_priv_data = sdev->hostdata;
	interface_type  = mr_device_priv_data->interface_type;

	switch (interface_type) {
	case SAS_PD:
		device_qd = MEGASAS_SAS_QD;
		break;
	case SATA_PD:
		device_qd = MEGASAS_SATA_QD;
		break;
	case NVME_PD:
		device_qd = MEGASAS_NVME_QD;
		break;
	}

	if (is_target_prop) {
		tgt_device_qd = le32_to_cpu(instance->tgt_prop->device_qdepth);
		if (tgt_device_qd &&
		    (tgt_device_qd <= instance->host->can_queue))
			device_qd = tgt_device_qd;
	}

	if (instance->enable_sdev_max_qd && interface_type != UNKNOWN_DRIVE)
		device_qd = instance->host->can_queue;

	scsi_change_queue_depth(sdev, device_qd);
}

/*
 * megasas_set_static_target_properties -
 * Device property set by driver are static and it is not required to be
 * updated after OCR.
 *
 * set io timeout
 * set device queue depth
 * set nvme device properties. see - megasas_set_nvme_device_properties
 *
 * @sdev:				scsi device
 * @is_target_prop			true, if fw provided target properties.
 */
static void megasas_set_static_target_properties(struct scsi_device *sdev,
						 bool is_target_prop)
{
	u32 max_io_size_kb = MR_DEFAULT_NVME_MDTS_KB;
	struct megasas_instance *instance;

	instance = megasas_lookup_instance(sdev->host->host_no);

	/*
	 * The RAID firmware may require extended timeouts.
	 */
	blk_queue_rq_timeout(sdev->request_queue, scmd_timeout * HZ);

	/* max_io_size_kb will be set to non zero for
	 * nvme based vd and syspd.
	 */
	if (is_target_prop)
		max_io_size_kb = le32_to_cpu(instance->tgt_prop->max_io_size_kb);

	if (instance->nvme_page_size && max_io_size_kb)
		megasas_set_nvme_device_properties(sdev, (max_io_size_kb << 10));

	megasas_set_fw_assisted_qd(sdev, is_target_prop);
}


static int megasas_slave_configure(struct scsi_device *sdev)
{
	u16 pd_index = 0;
	struct megasas_instance *instance;
	int ret_target_prop = DCMD_FAILED;
	bool is_target_prop = false;

	instance = megasas_lookup_instance(sdev->host->host_no);
	if (instance->pd_list_not_supported) {
		if (!MEGASAS_IS_LOGICAL(sdev) && sdev->type == TYPE_DISK) {
			pd_index = (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
				sdev->id;
			if (instance->pd_list[pd_index].driveState !=
				MR_PD_STATE_SYSTEM)
				return -ENXIO;
		}
	}

	mutex_lock(&instance->reset_mutex);
	/* Send DCMD to Firmware and cache the information */
	if ((instance->pd_info) && !MEGASAS_IS_LOGICAL(sdev))
		megasas_get_pd_info(instance, sdev);

	/* Some ventura firmware may not have instance->nvme_page_size set.
	 * Do not send MR_DCMD_DRV_GET_TARGET_PROP
	 */
	if ((instance->tgt_prop) && (instance->nvme_page_size))
		ret_target_prop = megasas_get_target_prop(instance, sdev);

	is_target_prop = (ret_target_prop == DCMD_SUCCESS) ? true : false;
	megasas_set_static_target_properties(sdev, is_target_prop);

	/* This sdev property may change post OCR */
	megasas_set_dynamic_target_properties(sdev, is_target_prop);

	mutex_unlock(&instance->reset_mutex);

	return 0;
}

static int megasas_slave_alloc(struct scsi_device *sdev)
{
	u16 pd_index = 0;
	struct megasas_instance *instance ;
	struct MR_PRIV_DEVICE *mr_device_priv_data;

	instance = megasas_lookup_instance(sdev->host->host_no);
	if (!MEGASAS_IS_LOGICAL(sdev)) {
		/*
		 * Open the OS scan to the SYSTEM PD
		 */
		pd_index =
			(sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
			sdev->id;
		if ((instance->pd_list_not_supported ||
			instance->pd_list[pd_index].driveState ==
			MR_PD_STATE_SYSTEM)) {
			goto scan_target;
		}
		return -ENXIO;
	}

scan_target:
	mr_device_priv_data = kzalloc(sizeof(*mr_device_priv_data),
					GFP_KERNEL);
	if (!mr_device_priv_data)
		return -ENOMEM;
	sdev->hostdata = mr_device_priv_data;

	atomic_set(&mr_device_priv_data->r1_ldio_hint,
		   instance->r1_ldio_hint_default);
	return 0;
}

static void megasas_slave_destroy(struct scsi_device *sdev)
{
	kfree(sdev->hostdata);
	sdev->hostdata = NULL;
}

/*
* megasas_complete_outstanding_ioctls - Complete outstanding ioctls after a
*                                       kill adapter
* @instance:				Adapter soft state
*
*/
static void megasas_complete_outstanding_ioctls(struct megasas_instance *instance)
{
	int i;
	struct megasas_cmd *cmd_mfi;
	struct megasas_cmd_fusion *cmd_fusion;
	struct fusion_context *fusion = instance->ctrl_context;

	/* Find all outstanding ioctls */
	if (fusion) {
		for (i = 0; i < instance->max_fw_cmds; i++) {
			cmd_fusion = fusion->cmd_list[i];
			if (cmd_fusion->sync_cmd_idx != (u32)ULONG_MAX) {
				cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
				if (cmd_mfi->sync_cmd &&
				    (cmd_mfi->frame->hdr.cmd != MFI_CMD_ABORT)) {
					cmd_mfi->frame->hdr.cmd_status =
							MFI_STAT_WRONG_STATE;
					megasas_complete_cmd(instance,
							     cmd_mfi, DID_OK);
				}
			}
		}
	} else {
		for (i = 0; i < instance->max_fw_cmds; i++) {
			cmd_mfi = instance->cmd_list[i];
			if (cmd_mfi->sync_cmd && cmd_mfi->frame->hdr.cmd !=
				MFI_CMD_ABORT)
				megasas_complete_cmd(instance, cmd_mfi, DID_OK);
		}
	}
}


void megaraid_sas_kill_hba(struct megasas_instance *instance)
{
	/* Set critical error to block I/O & ioctls in case caller didn't */
	atomic_set(&instance->adprecovery, MEGASAS_HW_CRITICAL_ERROR);
	/* Wait 1 second to ensure IO or ioctls in build have posted */
	msleep(1000);
	if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
		(instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
		(instance->adapter_type != MFI_SERIES)) {
		if (!instance->requestorId) {
			writel(MFI_STOP_ADP, &instance->reg_set->doorbell);
			/* Flush */
			readl(&instance->reg_set->doorbell);
		}
		if (instance->requestorId && instance->peerIsPresent)
			memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
	} else {
		writel(MFI_STOP_ADP,
			&instance->reg_set->inbound_doorbell);
	}
	/* Complete outstanding ioctls when adapter is killed */
	megasas_complete_outstanding_ioctls(instance);
}

 /**
  * megasas_check_and_restore_queue_depth - Check if queue depth needs to be
  *					restored to max value
  * @instance:			Adapter soft state
  *
  */
void
megasas_check_and_restore_queue_depth(struct megasas_instance *instance)
{
	unsigned long flags;

	if (instance->flag & MEGASAS_FW_BUSY
	    && time_after(jiffies, instance->last_time + 5 * HZ)
	    && atomic_read(&instance->fw_outstanding) <
	    instance->throttlequeuedepth + 1) {

		spin_lock_irqsave(instance->host->host_lock, flags);
		instance->flag &= ~MEGASAS_FW_BUSY;

		instance->host->can_queue = instance->cur_can_queue;
		spin_unlock_irqrestore(instance->host->host_lock, flags);
	}
}

/**
 * megasas_complete_cmd_dpc	 -	Returns FW's controller structure
 * @instance_addr:			Address of adapter soft state
 *
 * Tasklet to complete cmds
 */
static void megasas_complete_cmd_dpc(unsigned long instance_addr)
{
	u32 producer;
	u32 consumer;
	u32 context;
	struct megasas_cmd *cmd;
	struct megasas_instance *instance =
				(struct megasas_instance *)instance_addr;
	unsigned long flags;

	/* If we have already declared adapter dead, donot complete cmds */
	if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
		return;

	spin_lock_irqsave(&instance->completion_lock, flags);

	producer = le32_to_cpu(*instance->producer);
	consumer = le32_to_cpu(*instance->consumer);

	while (consumer != producer) {
		context = le32_to_cpu(instance->reply_queue[consumer]);
		if (context >= instance->max_fw_cmds) {
			dev_err(&instance->pdev->dev, "Unexpected context value %x\n",
				context);
			BUG();
		}

		cmd = instance->cmd_list[context];

		megasas_complete_cmd(instance, cmd, DID_OK);

		consumer++;
		if (consumer == (instance->max_fw_cmds + 1)) {
			consumer = 0;
		}
	}

	*instance->consumer = cpu_to_le32(producer);

	spin_unlock_irqrestore(&instance->completion_lock, flags);

	/*
	 * Check if we can restore can_queue
	 */
	megasas_check_and_restore_queue_depth(instance);
}

static void megasas_sriov_heartbeat_handler(struct timer_list *t);

/**
 * megasas_start_timer - Initializes sriov heartbeat timer object
 * @instance:		Adapter soft state
 *
 */
void megasas_start_timer(struct megasas_instance *instance)
{
	struct timer_list *timer = &instance->sriov_heartbeat_timer;

	timer_setup(timer, megasas_sriov_heartbeat_handler, 0);
	timer->expires = jiffies + MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF;
	add_timer(timer);
}

static void
megasas_internal_reset_defer_cmds(struct megasas_instance *instance);

static void
process_fw_state_change_wq(struct work_struct *work);

static void megasas_do_ocr(struct megasas_instance *instance)
{
	if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
	(instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) ||
	(instance->pdev->device == PCI_DEVICE_ID_LSI_VERDE_ZCR)) {
		*instance->consumer = cpu_to_le32(MEGASAS_ADPRESET_INPROG_SIGN);
	}
	instance->instancet->disable_intr(instance);
	atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_INFAULT);
	instance->issuepend_done = 0;

	atomic_set(&instance->fw_outstanding, 0);
	megasas_internal_reset_defer_cmds(instance);
	process_fw_state_change_wq(&instance->work_init);
}

static int megasas_get_ld_vf_affiliation_111(struct megasas_instance *instance,
					    int initial)
{
	struct megasas_cmd *cmd;
	struct megasas_dcmd_frame *dcmd;
	struct MR_LD_VF_AFFILIATION_111 *new_affiliation_111 = NULL;
	dma_addr_t new_affiliation_111_h;
	int ld, retval = 0;
	u8 thisVf;

	cmd = megasas_get_cmd(instance);

	if (!cmd) {
		dev_printk(KERN_DEBUG, &instance->pdev->dev, "megasas_get_ld_vf_affiliation_111:"
		       "Failed to get cmd for scsi%d\n",
			instance->host->host_no);
		return -ENOMEM;
	}

	dcmd = &cmd->frame->dcmd;

	if (!instance->vf_affiliation_111) {
		dev_warn(&instance->pdev->dev, "SR-IOV: Couldn't get LD/VF "
		       "affiliation for scsi%d\n", instance->host->host_no);
		megasas_return_cmd(instance, cmd);
		return -ENOMEM;
	}

	if (initial)
			memset(instance->vf_affiliation_111, 0,
			       sizeof(struct MR_LD_VF_AFFILIATION_111));
	else {
		new_affiliation_111 =
			dma_alloc_coherent(&instance->pdev->dev,
					   sizeof(struct MR_LD_VF_AFFILIATION_111),
					   &new_affiliation_111_h, GFP_KERNEL);
		if (!new_affiliation_111) {
			dev_printk(KERN_DEBUG, &instance->pdev->dev, "SR-IOV: Couldn't allocate "
			       "memory for new affiliation for scsi%d\n",
			       instance->host->host_no);
			megasas_return_cmd(instance, cmd);
			return -ENOMEM;
		}
	}

	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);

	dcmd->cmd = MFI_CMD_DCMD;
	dcmd->cmd_status = MFI_STAT_INVALID_STATUS;
	dcmd->sge_count = 1;
	dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_BOTH);
	dcmd->timeout = 0;
	dcmd->pad_0 = 0;
	dcmd->data_xfer_len =
		cpu_to_le32(sizeof(struct MR_LD_VF_AFFILIATION_111));
	dcmd->opcode = cpu_to_le32(MR_DCMD_LD_VF_MAP_GET_ALL_LDS_111);

	if (initial)
		dcmd->sgl.sge32[0].phys_addr =
			cpu_to_le32(instance->vf_affiliation_111_h);
	else
		dcmd->sgl.sge32[0].phys_addr =
			cpu_to_le32(new_affiliation_111_h);

	dcmd->sgl.sge32[0].length = cpu_to_le32(
		sizeof(struct MR_LD_VF_AFFILIATION_111));

	dev_warn(&instance->pdev->dev, "SR-IOV: Getting LD/VF affiliation for "
	       "scsi%d\n", instance->host->host_no);

	if (megasas_issue_blocked_cmd(instance, cmd, 0) != DCMD_SUCCESS) {
		dev_warn(&instance->pdev->dev, "SR-IOV: LD/VF affiliation DCMD"
		       " failed with status 0x%x for scsi%d\n",
		       dcmd->cmd_status, instance->host->host_no);
		retval = 1; /* Do a scan if we couldn't get affiliation */
		goto out;
	}

	if (!initial) {
		thisVf = new_affiliation_111->thisVf;
		for (ld = 0 ; ld < new_affiliation_111->vdCount; ld++)
			if (instance->vf_affiliation_111->map[ld].policy[thisVf] !=
			    new_affiliation_111->map[ld].policy[thisVf]) {
				dev_warn(&instance->pdev->dev, "SR-IOV: "
				       "Got new LD/VF affiliation for scsi%d\n",
				       instance->host->host_no);
				memcpy(instance->vf_affiliation_111,
				       new_affiliation_111,
				       sizeof(struct MR_LD_VF_AFFILIATION_111));
				retval = 1;
				goto out;
			}
	}
out:
	if (new_affiliation_111) {
		dma_free_coherent(&instance->pdev->dev,
				    sizeof(struct MR_LD_VF_AFFILIATION_111),
				    new_affiliation_111,
				    new_affiliation_111_h);
	}

	megasas_return_cmd(instance, cmd);

	return retval;
}

static int megasas_get_ld_vf_affiliation_12(struct megasas_instance *instance,
					    int initial)
{
	struct megasas_cmd *cmd;
	struct megasas_dcmd_frame *dcmd;
	struct MR_LD_VF_AFFILIATION *new_affiliation = NULL;
	struct MR_LD_VF_MAP *newmap = NULL, *savedmap = NULL;
	dma_addr_t new_affiliation_h;
	int i, j, retval = 0, found = 0, doscan = 0;
	u8 thisVf;

	cmd = megasas_get_cmd(instance);

	if (!cmd) {
		dev_printk(KERN_DEBUG, &instance->pdev->dev, "megasas_get_ld_vf_affiliation12: "
		       "Failed to get cmd for scsi%d\n",
		       instance->host->host_no);
		return -ENOMEM;
	}

	dcmd = &cmd->frame->dcmd;

	if (!instance->vf_affiliation) {
		dev_warn(&instance->pdev->dev, "SR-IOV: Couldn't get LD/VF "
		       "affiliation for scsi%d\n", instance->host->host_no);
		megasas_return_cmd(instance, cmd);
		return -ENOMEM;
	}

	if (initial)
		memset(instance->vf_affiliation, 0, (MAX_LOGICAL_DRIVES + 1) *
		       sizeof(struct MR_LD_VF_AFFILIATION));
	else {
		new_affiliation =
			dma_alloc_coherent(&instance->pdev->dev,
					   (MAX_LOGICAL_DRIVES + 1) * sizeof(struct MR_LD_VF_AFFILIATION),
					   &new_affiliation_h, GFP_KERNEL);
		if (!new_affiliation) {
			dev_printk(KERN_DEBUG, &instance->pdev->dev, "SR-IOV: Couldn't allocate "
			       "memory for new affiliation for scsi%d\n",
			       instance->host->host_no);
			megasas_return_cmd(instance, cmd);
			return -ENOMEM;
		}
	}

	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);

	dcmd->cmd = MFI_CMD_DCMD;
	dcmd->cmd_status = MFI_STAT_INVALID_STATUS;
	dcmd->sge_count = 1;
	dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_BOTH);
	dcmd->timeout = 0;
	dcmd->pad_0 = 0;
	dcmd->data_xfer_len = cpu_to_le32((MAX_LOGICAL_DRIVES + 1) *
		sizeof(struct MR_LD_VF_AFFILIATION));
	dcmd->opcode = cpu_to_le32(MR_DCMD_LD_VF_MAP_GET_ALL_LDS);

	if (initial)
		dcmd->sgl.sge32[0].phys_addr =
			cpu_to_le32(instance->vf_affiliation_h);
	else
		dcmd->sgl.sge32[0].phys_addr =
			cpu_to_le32(new_affiliation_h);

	dcmd->sgl.sge32[0].length = cpu_to_le32((MAX_LOGICAL_DRIVES + 1) *
		sizeof(struct MR_LD_VF_AFFILIATION));

	dev_warn(&instance->pdev->dev, "SR-IOV: Getting LD/VF affiliation for "
	       "scsi%d\n", instance->host->host_no);


	if (megasas_issue_blocked_cmd(instance, cmd, 0) != DCMD_SUCCESS) {
		dev_warn(&instance->pdev->dev, "SR-IOV: LD/VF affiliation DCMD"
		       " failed with status 0x%x for scsi%d\n",
		       dcmd->cmd_status, instance->host->host_no);
		retval = 1; /* Do a scan if we couldn't get affiliation */
		goto out;
	}

	if (!initial) {
		if (!new_affiliation->ldCount) {
			dev_warn(&instance->pdev->dev, "SR-IOV: Got new LD/VF "
			       "affiliation for passive path for scsi%d\n",
			       instance->host->host_no);
			retval = 1;
			goto out;
		}
		newmap = new_affiliation->map;
		savedmap = instance->vf_affiliation->map;
		thisVf = new_affiliation->thisVf;
		for (i = 0 ; i < new_affiliation->ldCount; i++) {
			found = 0;
			for (j = 0; j < instance->vf_affiliation->ldCount;
			     j++) {
				if (newmap->ref.targetId ==
				    savedmap->ref.targetId) {
					found = 1;
					if (newmap->policy[thisVf] !=
					    savedmap->policy[thisVf]) {
						doscan = 1;
						goto out;
					}
				}
				savedmap = (struct MR_LD_VF_MAP *)
					((unsigned char *)savedmap +
					 savedmap->size);
			}
			if (!found && newmap->policy[thisVf] !=
			    MR_LD_ACCESS_HIDDEN) {
				doscan = 1;
				goto out;
			}
			newmap = (struct MR_LD_VF_MAP *)
				((unsigned char *)newmap + newmap->size);
		}

		newmap = new_affiliation->map;
		savedmap = instance->vf_affiliation->map;

		for (i = 0 ; i < instance->vf_affiliation->ldCount; i++) {
			found = 0;
			for (j = 0 ; j < new_affiliation->ldCount; j++) {
				if (savedmap->ref.targetId ==
				    newmap->ref.targetId) {
					found = 1;
					if (savedmap->policy[thisVf] !=
					    newmap->policy[thisVf]) {
						doscan = 1;
						goto out;
					}
				}
				newmap = (struct MR_LD_VF_MAP *)
					((unsigned char *)newmap +
					 newmap->size);
			}
			if (!found && savedmap->policy[thisVf] !=
			    MR_LD_ACCESS_HIDDEN) {
				doscan = 1;
				goto out;
			}
			savedmap = (struct MR_LD_VF_MAP *)
				((unsigned char *)savedmap +
				 savedmap->size);
		}
	}
out:
	if (doscan) {
		dev_warn(&instance->pdev->dev, "SR-IOV: Got new LD/VF "
		       "affiliation for scsi%d\n", instance->host->host_no);
		memcpy(instance->vf_affiliation, new_affiliation,
		       new_affiliation->size);
		retval = 1;
	}

	if (new_affiliation)
		dma_free_coherent(&instance->pdev->dev,
				    (MAX_LOGICAL_DRIVES + 1) *
				    sizeof(struct MR_LD_VF_AFFILIATION),
				    new_affiliation, new_affiliation_h);
	megasas_return_cmd(instance, cmd);

	return retval;
}

/* This function will get the current SR-IOV LD/VF affiliation */
static int megasas_get_ld_vf_affiliation(struct megasas_instance *instance,
	int initial)
{
	int retval;

	if (instance->PlasmaFW111)
		retval = megasas_get_ld_vf_affiliation_111(instance, initial);
	else
		retval = megasas_get_ld_vf_affiliation_12(instance, initial);
	return retval;
}

/* This function will tell FW to start the SR-IOV heartbeat */
int megasas_sriov_start_heartbeat(struct megasas_instance *instance,
					 int initial)
{
	struct megasas_cmd *cmd;
	struct megasas_dcmd_frame *dcmd;
	int retval = 0;

	cmd = megasas_get_cmd(instance);

	if (!cmd) {
		dev_printk(KERN_DEBUG, &instance->pdev->dev, "megasas_sriov_start_heartbeat: "
		       "Failed to get cmd for scsi%d\n",
		       instance->host->host_no);
		return -ENOMEM;
	}

	dcmd = &cmd->frame->dcmd;

	if (initial) {
		instance->hb_host_mem =
			dma_alloc_coherent(&instance->pdev->dev,
					   sizeof(struct MR_CTRL_HB_HOST_MEM),
					   &instance->hb_host_mem_h,
					   GFP_KERNEL);
		if (!instance->hb_host_mem) {
			dev_printk(KERN_DEBUG, &instance->pdev->dev, "SR-IOV: Couldn't allocate"
			       " memory for heartbeat host memory for scsi%d\n",
			       instance->host->host_no);
			retval = -ENOMEM;
			goto out;
		}
	}

	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);

	dcmd->mbox.s[0] = cpu_to_le16(sizeof(struct MR_CTRL_HB_HOST_MEM));
	dcmd->cmd = MFI_CMD_DCMD;
	dcmd->cmd_status = MFI_STAT_INVALID_STATUS;
	dcmd->sge_count = 1;
	dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_BOTH);
	dcmd->timeout = 0;
	dcmd->pad_0 = 0;
	dcmd->data_xfer_len = cpu_to_le32(sizeof(struct MR_CTRL_HB_HOST_MEM));
	dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_SHARED_HOST_MEM_ALLOC);

	megasas_set_dma_settings(instance, dcmd, instance->hb_host_mem_h,
				 sizeof(struct MR_CTRL_HB_HOST_MEM));

	dev_warn(&instance->pdev->dev, "SR-IOV: Starting heartbeat for scsi%d\n",
	       instance->host->host_no);

	if ((instance->adapter_type != MFI_SERIES) &&
	    !instance->mask_interrupts)
		retval = megasas_issue_blocked_cmd(instance, cmd,
			MEGASAS_ROUTINE_WAIT_TIME_VF);
	else
		retval = megasas_issue_polled(instance, cmd);

	if (retval) {
		dev_warn(&instance->pdev->dev, "SR-IOV: MR_DCMD_CTRL_SHARED_HOST"
			"_MEM_ALLOC DCMD %s for scsi%d\n",
			(dcmd->cmd_status == MFI_STAT_INVALID_STATUS) ?
			"timed out" : "failed", instance->host->host_no);
		retval = 1;
	}

out:
	megasas_return_cmd(instance, cmd);

	return retval;
}

/* Handler for SR-IOV heartbeat */
static void megasas_sriov_heartbeat_handler(struct timer_list *t)
{
	struct megasas_instance *instance =
		from_timer(instance, t, sriov_heartbeat_timer);

	if (instance->hb_host_mem->HB.fwCounter !=
	    instance->hb_host_mem->HB.driverCounter) {
		instance->hb_host_mem->HB.driverCounter =
			instance->hb_host_mem->HB.fwCounter;
		mod_timer(&instance->sriov_heartbeat_timer,
			  jiffies + MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
	} else {
		dev_warn(&instance->pdev->dev, "SR-IOV: Heartbeat never "
		       "completed for scsi%d\n", instance->host->host_no);
		schedule_work(&instance->work_init);
	}
}

/**
 * megasas_wait_for_outstanding -	Wait for all outstanding cmds
 * @instance:				Adapter soft state
 *
 * This function waits for up to MEGASAS_RESET_WAIT_TIME seconds for FW to
 * complete all its outstanding commands. Returns error if one or more IOs
 * are pending after this time period. It also marks the controller dead.
 */
static int megasas_wait_for_outstanding(struct megasas_instance *instance)
{
	int i, sl, outstanding;
	u32 reset_index;
	u32 wait_time = MEGASAS_RESET_WAIT_TIME;
	unsigned long flags;
	struct list_head clist_local;
	struct megasas_cmd *reset_cmd;
	u32 fw_state;

	if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) {
		dev_info(&instance->pdev->dev, "%s:%d HBA is killed.\n",
		__func__, __LINE__);
		return FAILED;
	}

	if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) {

		INIT_LIST_HEAD(&clist_local);
		spin_lock_irqsave(&instance->hba_lock, flags);
		list_splice_init(&instance->internal_reset_pending_q,
				&clist_local);
		spin_unlock_irqrestore(&instance->hba_lock, flags);

		dev_notice(&instance->pdev->dev, "HBA reset wait ...\n");
		for (i = 0; i < wait_time; i++) {
			msleep(1000);
			if (atomic_read(&instance->adprecovery) == MEGASAS_HBA_OPERATIONAL)
				break;
		}

		if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) {
			dev_notice(&instance->pdev->dev, "reset: Stopping HBA.\n");
			atomic_set(&instance->adprecovery, MEGASAS_HW_CRITICAL_ERROR);
			return FAILED;
		}

		reset_index = 0;
		while (!list_empty(&clist_local)) {
			reset_cmd = list_entry((&clist_local)->next,
						struct megasas_cmd, list);
			list_del_init(&reset_cmd->list);
			if (reset_cmd->scmd) {
				reset_cmd->scmd->result = DID_REQUEUE << 16;
				dev_notice(&instance->pdev->dev, "%d:%p reset [%02x]\n",
					reset_index, reset_cmd,
					reset_cmd->scmd->cmnd[0]);

				reset_cmd->scmd->scsi_done(reset_cmd->scmd);
				megasas_return_cmd(instance, reset_cmd);
			} else if (reset_cmd->sync_cmd) {
				dev_notice(&instance->pdev->dev, "%p synch cmds"
						"reset queue\n",
						reset_cmd);

				reset_cmd->cmd_status_drv = MFI_STAT_INVALID_STATUS;
				instance->instancet->fire_cmd(instance,
						reset_cmd->frame_phys_addr,
						0, instance->reg_set);
			} else {
				dev_notice(&instance->pdev->dev, "%p unexpected"
					"cmds lst\n",
					reset_cmd);
			}
			reset_index++;
		}

		return SUCCESS;
	}

	for (i = 0; i < resetwaittime; i++) {
		outstanding = atomic_read(&instance->fw_outstanding);

		if (!outstanding)
			break;

		if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
			dev_notice(&instance->pdev->dev, "[%2d]waiting for %d "
			       "commands to complete\n",i,outstanding);
			/*
			 * Call cmd completion routine. Cmd to be
			 * be completed directly without depending on isr.
			 */
			megasas_complete_cmd_dpc((unsigned long)instance);
		}

		msleep(1000);
	}

	i = 0;
	outstanding = atomic_read(&instance->fw_outstanding);
	fw_state = instance->instancet->read_fw_status_reg(instance) & MFI_STATE_MASK;

	if ((!outstanding && (fw_state == MFI_STATE_OPERATIONAL)))
		goto no_outstanding;

	if (instance->disableOnlineCtrlReset)
		goto kill_hba_and_failed;
	do {
		if ((fw_state == MFI_STATE_FAULT) || atomic_read(&instance->fw_outstanding)) {
			dev_info(&instance->pdev->dev,
				"%s:%d waiting_for_outstanding: before issue OCR. FW state = 0x%x, outstanding 0x%x\n",
				__func__, __LINE__, fw_state, atomic_read(&instance->fw_outstanding));
			if (i == 3)
				goto kill_hba_and_failed;
			megasas_do_ocr(instance);

			if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) {
				dev_info(&instance->pdev->dev, "%s:%d OCR failed and HBA is killed.\n",
				__func__, __LINE__);
				return FAILED;
			}
			dev_info(&instance->pdev->dev, "%s:%d waiting_for_outstanding: after issue OCR.\n",
				__func__, __LINE__);

			for (sl = 0; sl < 10; sl++)
				msleep(500);

			outstanding = atomic_read(&instance->fw_outstanding);

			fw_state = instance->instancet->read_fw_status_reg(instance) & MFI_STATE_MASK;
			if ((!outstanding && (fw_state == MFI_STATE_OPERATIONAL)))
				goto no_outstanding;
		}
		i++;
	} while (i <= 3);

no_outstanding:

	dev_info(&instance->pdev->dev, "%s:%d no more pending commands remain after reset handling.\n",
		__func__, __LINE__);
	return SUCCESS;

kill_hba_and_failed:

	/* Reset not supported, kill adapter */
	dev_info(&instance->pdev->dev, "%s:%d killing adapter scsi%d"
		" disableOnlineCtrlReset %d fw_outstanding %d \n",
		__func__, __LINE__, instance->host->host_no, instance->disableOnlineCtrlReset,
		atomic_read(&instance->fw_outstanding));
	megasas_dump_pending_frames(instance);
	megaraid_sas_kill_hba(instance);

	return FAILED;
}

/**
 * megasas_generic_reset -	Generic reset routine
 * @scmd:			Mid-layer SCSI command
 *
 * This routine implements a generic reset handler for device, bus and host
 * reset requests. Device, bus and host specific reset handlers can use this
 * function after they do their specific tasks.
 */
static int megasas_generic_reset(struct scsi_cmnd *scmd)
{
	int ret_val;
	struct megasas_instance *instance;

	instance = (struct megasas_instance *)scmd->device->host->hostdata;

	scmd_printk(KERN_NOTICE, scmd, "megasas: RESET cmd=%x retries=%x\n",
		 scmd->cmnd[0], scmd->retries);

	if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) {
		dev_err(&instance->pdev->dev, "cannot recover from previous reset failures\n");
		return FAILED;
	}

	ret_val = megasas_wait_for_outstanding(instance);
	if (ret_val == SUCCESS)
		dev_notice(&instance->pdev->dev, "reset successful\n");
	else
		dev_err(&instance->pdev->dev, "failed to do reset\n");

	return ret_val;
}

/**
 * megasas_reset_timer - quiesce the adapter if required
 * @scmd:		scsi cmnd
 *
 * Sets the FW busy flag and reduces the host->can_queue if the
 * cmd has not been completed within the timeout period.
 */
static enum
blk_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd)
{
	struct megasas_instance *instance;
	unsigned long flags;

	if (time_after(jiffies, scmd->jiffies_at_alloc +
				(scmd_timeout * 2) * HZ)) {
		return BLK_EH_DONE;
	}

	instance = (struct megasas_instance *)scmd->device->host->hostdata;
	if (!(instance->flag & MEGASAS_FW_BUSY)) {
		/* FW is busy, throttle IO */
		spin_lock_irqsave(instance->host->host_lock, flags);

		instance->host->can_queue = instance->throttlequeuedepth;
		instance->last_time = jiffies;
		instance->flag |= MEGASAS_FW_BUSY;

		spin_unlock_irqrestore(instance->host->host_lock, flags);
	}
	return BLK_EH_RESET_TIMER;
}

/**
 * megasas_dump -	This function will print hexdump of provided buffer.
 * @buf:		Buffer to be dumped
 * @sz:		Size in bytes
 * @format:		Different formats of dumping e.g. format=n will
 *			cause only 'n' 32 bit words to be dumped in a single
 *			line.
 */
inline void
megasas_dump(void *buf, int sz, int format)
{
	int i;
	__le32 *buf_loc = (__le32 *)buf;

	for (i = 0; i < (sz / sizeof(__le32)); i++) {
		if ((i % format) == 0) {
			if (i != 0)
				printk(KERN_CONT "\n");
			printk(KERN_CONT "%08x: ", (i * 4));
		}
		printk(KERN_CONT "%08x ", le32_to_cpu(buf_loc[i]));
	}
	printk(KERN_CONT "\n");
}

/**
 * megasas_dump_reg_set -	This function will print hexdump of register set
 * @buf:			Buffer to be dumped
 * @sz:				Size in bytes
 * @format:			Different formats of dumping e.g. format=n will
 *				cause only 'n' 32 bit words to be dumped in a
 *				single line.
 */
inline void
megasas_dump_reg_set(void __iomem *reg_set)
{
	unsigned int i, sz = 256;
	u32 __iomem *reg = (u32 __iomem *)reg_set;

	for (i = 0; i < (sz / sizeof(u32)); i++)
		printk("%08x: %08x\n", (i * 4), readl(&reg[i]));
}

/**
 * megasas_dump_fusion_io -	This function will print key details
 *				of SCSI IO
 * @scmd:			SCSI command pointer of SCSI IO
 */
void
megasas_dump_fusion_io(struct scsi_cmnd *scmd)
{
	struct megasas_cmd_fusion *cmd;
	union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
	struct megasas_instance *instance;

	cmd = (struct megasas_cmd_fusion *)scmd->SCp.ptr;
	instance = (struct megasas_instance *)scmd->device->host->hostdata;

	scmd_printk(KERN_INFO, scmd,
		    "scmd: (0x%p)  retries: 0x%x  allowed: 0x%x\n",
		    scmd, scmd->retries, scmd->allowed);
	scsi_print_command(scmd);

	if (cmd) {
		req_desc = (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)cmd->request_desc;
		scmd_printk(KERN_INFO, scmd, "Request descriptor details:\n");
		scmd_printk(KERN_INFO, scmd,
			    "RequestFlags:0x%x  MSIxIndex:0x%x  SMID:0x%x  LMID:0x%x  DevHandle:0x%x\n",
			    req_desc->SCSIIO.RequestFlags,
			    req_desc->SCSIIO.MSIxIndex, req_desc->SCSIIO.SMID,
			    req_desc->SCSIIO.LMID, req_desc->SCSIIO.DevHandle);

		printk(KERN_INFO "IO request frame:\n");
		megasas_dump(cmd->io_request,
			     MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE, 8);
		printk(KERN_INFO "Chain frame:\n");
		megasas_dump(cmd->sg_frame,
			     instance->max_chain_frame_sz, 8);
	}

}

/*
 * megasas_dump_sys_regs - This function will dump system registers through
 *			    sysfs.
 * @reg_set:		    Pointer to System register set.
 * @buf:		    Buffer to which output is to be written.
 * @return:		    Number of bytes written to buffer.
 */
static inline ssize_t
megasas_dump_sys_regs(void __iomem *reg_set, char *buf)
{
	unsigned int i, sz = 256;
	int bytes_wrote = 0;
	char *loc = (char *)buf;
	u32 __iomem *reg = (u32 __iomem *)reg_set;

	for (i = 0; i < sz / sizeof(u32); i++) {
		bytes_wrote += snprintf(loc + bytes_wrote, PAGE_SIZE,
					"%08x: %08x\n", (i * 4),
					readl(&reg[i]));
	}
	return bytes_wrote;
}

/**
 * megasas_reset_bus_host -	Bus & host reset handler entry point
 */
static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
{
	int ret;
	struct megasas_instance *instance;

	instance = (struct megasas_instance *)scmd->device->host->hostdata;

	scmd_printk(KERN_INFO, scmd,
		"OCR is requested due to IO timeout!!\n");

	scmd_printk(KERN_INFO, scmd,
		"SCSI host state: %d  SCSI host busy: %d  FW outstanding: %d\n",
		scmd->device->host->shost_state,
		scsi_host_busy(scmd->device->host),
		atomic_read(&instance->fw_outstanding));
	/*
	 * First wait for all commands to complete
	 */
	if (instance->adapter_type == MFI_SERIES) {
		ret = megasas_generic_reset(scmd);
	} else {
		megasas_dump_fusion_io(scmd);
		ret = megasas_reset_fusion(scmd->device->host,
				SCSIIO_TIMEOUT_OCR);
	}

	return ret;
}

/**
 * megasas_task_abort - Issues task abort request to firmware
 *			(supported only for fusion adapters)
 * @scmd:		SCSI command pointer
 */
static int megasas_task_abort(struct scsi_cmnd *scmd)
{
	int ret;
	struct megasas_instance *instance;

	instance = (struct megasas_instance *)scmd->device->host->hostdata;

	if (instance->adapter_type != MFI_SERIES)
		ret = megasas_task_abort_fusion(scmd);
	else {
		sdev_printk(KERN_NOTICE, scmd->device, "TASK ABORT not supported\n");
		ret = FAILED;
	}

	return ret;
}

/**
 * megasas_reset_target:  Issues target reset request to firmware
 *                        (supported only for fusion adapters)
 * @scmd:                 SCSI command pointer
 */
static int megasas_reset_target(struct scsi_cmnd *scmd)
{
	int ret;
	struct megasas_instance *instance;

	instance = (struct megasas_instance *)scmd->device->host->hostdata;

	if (instance->adapter_type != MFI_SERIES)
		ret = megasas_reset_target_fusion(scmd);
	else {
		sdev_printk(KERN_NOTICE, scmd->device, "TARGET RESET not supported\n");
		ret = FAILED;
	}

	return ret;
}

/**
 * megasas_bios_param - Returns disk geometry for a disk
 * @sdev:		device handle
 * @bdev:		block device
 * @capacity:		drive capacity
 * @geom:		geometry parameters
 */
static int
megasas_bios_param(struct scsi_device *sdev, struct block_device *bdev,
		 sector_t capacity, int geom[])
{
	int heads;
	int sectors;
	sector_t cylinders;
	unsigned long tmp;

	/* Default heads (64) & sectors (32) */
	heads = 64;
	sectors = 32;

	tmp = heads * sectors;
	cylinders = capacity;

	sector_div(cylinders, tmp);

	/*
	 * Handle extended translation size for logical drives > 1Gb
	 */

	if (capacity >= 0x200000) {
		heads = 255;
		sectors = 63;
		tmp = heads*sectors;
		cylinders = capacity;
		sector_div(cylinders, tmp);
	}

	geom[0] = heads;
	geom[1] = sectors;
	geom[2] = cylinders;

	return 0;
}

static void megasas_aen_polling(struct work_struct *work);

/**
 * megasas_service_aen -	Processes an event notification
 * @instance:			Adapter soft state
 * @cmd:			AEN command completed by the ISR
 *
 * For AEN, driver sends a command down to FW that is held by the FW till an
 * event occurs. When an event of interest occurs, FW completes the command
 * that it was previously holding.
 *
 * This routines sends SIGIO signal to processes that have registered with the
 * driver for AEN.
 */
static void
megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
{
	unsigned long flags;

	/*
	 * Don't signal app if it is just an aborted previously registered aen
	 */
	if ((!cmd->abort_aen) && (instance->unload == 0)) {
		spin_lock_irqsave(&poll_aen_lock, flags);
		megasas_poll_wait_aen = 1;
		spin_unlock_irqrestore(&poll_aen_lock, flags);
		wake_up(&megasas_poll_wait);
		kill_fasync(&megasas_async_queue, SIGIO, POLL_IN);
	}
	else
		cmd->abort_aen = 0;

	instance->aen_cmd = NULL;

	megasas_return_cmd(instance, cmd);

	if ((instance->unload == 0) &&
		((instance->issuepend_done == 1))) {
		struct megasas_aen_event *ev;

		ev = kzalloc(sizeof(*ev), GFP_ATOMIC);
		if (!ev) {
			dev_err(&instance->pdev->dev, "megasas_service_aen: out of memory\n");
		} else {
			ev->instance = instance;
			instance->ev = ev;
			INIT_DELAYED_WORK(&ev->hotplug_work,
					  megasas_aen_polling);
			schedule_delayed_work(&ev->hotplug_work, 0);
		}
	}
}

static ssize_t
fw_crash_buffer_store(struct device *cdev,
	struct device_attribute *attr, const char *buf, size_t count)
{
	struct Scsi_Host *shost = class_to_shost(cdev);
	struct megasas_instance *instance =
		(struct megasas_instance *) shost->hostdata;
	int val = 0;
	unsigned long flags;

	if (kstrtoint(buf, 0, &val) != 0)
		return -EINVAL;

	spin_lock_irqsave(&instance->crashdump_lock, flags);
	instance->fw_crash_buffer_offset = val;
	spin_unlock_irqrestore(&instance->crashdump_lock, flags);
	return strlen(buf);
}

static ssize_t
fw_crash_buffer_show(struct device *cdev,
	struct device_attribute *attr, char *buf)
{
	struct Scsi_Host *shost = class_to_shost(cdev);
	struct megasas_instance *instance =
		(struct megasas_instance *) shost->hostdata;
	u32 size;
	unsigned long dmachunk = CRASH_DMA_BUF_SIZE;
	unsigned long chunk_left_bytes;
	unsigned long src_addr;
	unsigned long flags;
	u32 buff_offset;

	spin_lock_irqsave(&instance->crashdump_lock, flags);
	buff_offset = instance->fw_crash_buffer_offset;
	if (!instance->crash_dump_buf &&
		!((instance->fw_crash_state == AVAILABLE) ||
		(instance->fw_crash_state == COPYING))) {
		dev_err(&instance->pdev->dev,
			"Firmware crash dump is not available\n");
		spin_unlock_irqrestore(&instance->crashdump_lock, flags);
		return -EINVAL;
	}

	if (buff_offset > (instance->fw_crash_buffer_size * dmachunk)) {
		dev_err(&instance->pdev->dev,
			"Firmware crash dump offset is out of range\n");
		spin_unlock_irqrestore(&instance->crashdump_lock, flags);
		return 0;
	}

	size = (instance->fw_crash_buffer_size * dmachunk) - buff_offset;
	chunk_left_bytes = dmachunk - (buff_offset % dmachunk);
	size = (size > chunk_left_bytes) ? chunk_left_bytes : size;
	size = (size >= PAGE_SIZE) ? (PAGE_SIZE - 1) : size;

	src_addr = (unsigned long)instance->crash_buf[buff_offset / dmachunk] +
		(buff_offset % dmachunk);
	memcpy(buf, (void *)src_addr, size);
	spin_unlock_irqrestore(&instance->crashdump_lock, flags);

	return size;
}

static ssize_t
fw_crash_buffer_size_show(struct device *cdev,
	struct device_attribute *attr, char *buf)
{
	struct Scsi_Host *shost = class_to_shost(cdev);
	struct megasas_instance *instance =
		(struct megasas_instance *) shost->hostdata;

	return snprintf(buf, PAGE_SIZE, "%ld\n", (unsigned long)
		((instance->fw_crash_buffer_size) * 1024 * 1024)/PAGE_SIZE);
}

static ssize_t
fw_crash_state_store(struct device *cdev,
	struct device_attribute *attr, const char *buf, size_t count)
{
	struct Scsi_Host *shost = class_to_shost(cdev);
	struct megasas_instance *instance =
		(struct megasas_instance *) shost->hostdata;
	int val = 0;
	unsigned long flags;

	if (kstrtoint(buf, 0, &val) != 0)
		return -EINVAL;

	if ((val <= AVAILABLE || val > COPY_ERROR)) {
		dev_err(&instance->pdev->dev, "application updates invalid "
			"firmware crash state\n");
		return -EINVAL;
	}

	instance->fw_crash_state = val;

	if ((val == COPIED) || (val == COPY_ERROR)) {
		spin_lock_irqsave(&instance->crashdump_lock, flags);
		megasas_free_host_crash_buffer(instance);
		spin_unlock_irqrestore(&instance->crashdump_lock, flags);
		if (val == COPY_ERROR)
			dev_info(&instance->pdev->dev, "application failed to "
				"copy Firmware crash dump\n");
		else
			dev_info(&instance->pdev->dev, "Firmware crash dump "
				"copied successfully\n");
	}
	return strlen(buf);
}

static ssize_t
fw_crash_state_show(struct device *cdev,
	struct device_attribute *attr, char *buf)
{
	struct Scsi_Host *shost = class_to_shost(cdev);
	struct megasas_instance *instance =
		(struct megasas_instance *) shost->hostdata;

	return snprintf(buf, PAGE_SIZE, "%d\n", instance->fw_crash_state);
}

static ssize_t
page_size_show(struct device *cdev,
	struct device_attribute *attr, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%ld\n", (unsigned long)PAGE_SIZE - 1);
}

static ssize_t
ldio_outstanding_show(struct device *cdev, struct device_attribute *attr,
	char *buf)
{
	struct Scsi_Host *shost = class_to_shost(cdev);
	struct megasas_instance *instance = (struct megasas_instance *)shost->hostdata;

	return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&instance->ldio_outstanding));
}

static ssize_t
fw_cmds_outstanding_show(struct device *cdev,
				 struct device_attribute *attr, char *buf)
{
	struct Scsi_Host *shost = class_to_shost(cdev);
	struct megasas_instance *instance = (struct megasas_instance *)shost->hostdata;

	return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&instance->fw_outstanding));
}

static ssize_t
enable_sdev_max_qd_show(struct device *cdev,
	struct device_attribute *attr, char *buf)
{
	struct Scsi_Host *shost = class_to_shost(cdev);
	struct megasas_instance *instance = (struct megasas_instance *)shost->hostdata;

	return snprintf(buf, PAGE_SIZE, "%d\n", instance->enable_sdev_max_qd);
}

static ssize_t
enable_sdev_max_qd_store(struct device *cdev,
	struct device_attribute *attr, const char *buf, size_t count)
{
	struct Scsi_Host *shost = class_to_shost(cdev);
	struct megasas_instance *instance = (struct megasas_instance *)shost->hostdata;
	u32 val = 0;
	bool is_target_prop;
	int ret_target_prop = DCMD_FAILED;
	struct scsi_device *sdev;

	if (kstrtou32(buf, 0, &val) != 0) {
		pr_err("megasas: could not set enable_sdev_max_qd\n");
		return -EINVAL;
	}

	mutex_lock(&instance->reset_mutex);
	if (val)
		instance->enable_sdev_max_qd = true;
	else
		instance->enable_sdev_max_qd = false;

	shost_for_each_device(sdev, shost) {
		ret_target_prop = megasas_get_target_prop(instance, sdev);
		is_target_prop = (ret_target_prop == DCMD_SUCCESS) ? true : false;
		megasas_set_fw_assisted_qd(sdev, is_target_prop);
	}
	mutex_unlock(&instance->reset_mutex);

	return strlen(buf);
}

static ssize_t
dump_system_regs_show(struct device *cdev,
			       struct device_attribute *attr, char *buf)
{
	struct Scsi_Host *shost = class_to_shost(cdev);
	struct megasas_instance *instance =
			(struct megasas_instance *)shost->hostdata;

	return megasas_dump_sys_regs(instance->reg_set, buf);
}

static ssize_t
raid_map_id_show(struct device *cdev, struct device_attribute *attr,
			  char *buf)
{
	struct Scsi_Host *shost = class_to_shost(cdev);
	struct megasas_instance *instance =
			(struct megasas_instance *)shost->hostdata;

	return snprintf(buf, PAGE_SIZE, "%ld\n",
			(unsigned long)instance->map_id);
}

static DEVICE_ATTR_RW(fw_crash_buffer);
static DEVICE_ATTR_RO(fw_crash_buffer_size);
static DEVICE_ATTR_RW(fw_crash_state);
static DEVICE_ATTR_RO(page_size);
static DEVICE_ATTR_RO(ldio_outstanding);
static DEVICE_ATTR_RO(fw_cmds_outstanding);
static DEVICE_ATTR_RW(enable_sdev_max_qd);
static DEVICE_ATTR_RO(dump_system_regs);
static DEVICE_ATTR_RO(raid_map_id);

static struct device_attribute *megaraid_host_attrs[] = {
	&dev_attr_fw_crash_buffer_size,
	&dev_attr_fw_crash_buffer,
	&dev_attr_fw_crash_state,
	&dev_attr_page_size,
	&dev_attr_ldio_outstanding,
	&dev_attr_fw_cmds_outstanding,
	&dev_attr_enable_sdev_max_qd,
	&dev_attr_dump_system_regs,
	&dev_attr_raid_map_id,
	NULL,
};

/*
 * Scsi host template for megaraid_sas driver
 */
static struct scsi_host_template megasas_template = {

	.module = THIS_MODULE,
	.name = "Avago SAS based MegaRAID driver",
	.proc_name = "megaraid_sas",
	.slave_configure = megasas_slave_configure,
	.slave_alloc = megasas_slave_alloc,
	.slave_destroy = megasas_slave_destroy,
	.queuecommand = megasas_queue_command,
	.eh_target_reset_handler = megasas_reset_target,
	.eh_abort_handler = megasas_task_abort,
	.eh_host_reset_handler = megasas_reset_bus_host,
	.eh_timed_out = megasas_reset_timer,
	.shost_attrs = megaraid_host_attrs,
	.bios_param = megasas_bios_param,
	.change_queue_depth = scsi_change_queue_depth,
	.max_segment_size = 0xffffffff,
	.no_write_same = 1,
};

/**
 * megasas_complete_int_cmd -	Completes an internal command
 * @instance:			Adapter soft state
 * @cmd:			Command to be completed
 *
 * The megasas_issue_blocked_cmd() function waits for a command to complete
 * after it issues a command. This function wakes up that waiting routine by
 * calling wake_up() on the wait queue.
 */
static void
megasas_complete_int_cmd(struct megasas_instance *instance,
			 struct megasas_cmd *cmd)
{
	cmd->cmd_status_drv = cmd->frame->io.cmd_status;
	wake_up(&instance->int_cmd_wait_q);
}

/**
 * megasas_complete_abort -	Completes aborting a command
 * @instance:			Adapter soft state
 * @cmd:			Cmd that was issued to abort another cmd
 *
 * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
 * after it issues an abort on a previously issued command. This function
 * wakes up all functions waiting on the same wait queue.
 */
static void
megasas_complete_abort(struct megasas_instance *instance,
		       struct megasas_cmd *cmd)
{
	if (cmd->sync_cmd) {
		cmd->sync_cmd = 0;
		cmd->cmd_status_drv = 0;
		wake_up(&instance->abort_cmd_wait_q);
	}
}

/**
 * megasas_complete_cmd -	Completes a command
 * @instance:			Adapter soft state
 * @cmd:			Command to be completed
 * @alt_status:			If non-zero, use this value as status to
 *				SCSI mid-layer instead of the value returned
 *				by the FW. This should be used if caller wants
 *				an alternate status (as in the case of aborted
 *				commands)
 */
void
megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
		     u8 alt_status)
{
	int exception = 0;
	struct megasas_header *hdr = &cmd->frame->hdr;
	unsigned long flags;
	struct fusion_context *fusion = instance->ctrl_context;
	u32 opcode, status;

	/* flag for the retry reset */
	cmd->retry_for_fw_reset = 0;

	if (cmd->scmd)
		cmd->scmd->SCp.ptr = NULL;

	switch (hdr->cmd) {
	case MFI_CMD_INVALID:
		/* Some older 1068 controller FW may keep a pended
		   MR_DCMD_CTRL_EVENT_GET_INFO left over from the main kernel
		   when booting the kdump kernel.  Ignore this command to
		   prevent a kernel panic on shutdown of the kdump kernel. */
		dev_warn(&instance->pdev->dev, "MFI_CMD_INVALID command "
		       "completed\n");
		dev_warn(&instance->pdev->dev, "If you have a controller "
		       "other than PERC5, please upgrade your firmware\n");
		break;
	case MFI_CMD_PD_SCSI_IO:
	case MFI_CMD_LD_SCSI_IO:

		/*
		 * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
		 * issued either through an IO path or an IOCTL path. If it
		 * was via IOCTL, we will send it to internal completion.
		 */
		if (cmd->sync_cmd) {
			cmd->sync_cmd = 0;
			megasas_complete_int_cmd(instance, cmd);
			break;
		}
		/* fall through */

	case MFI_CMD_LD_READ:
	case MFI_CMD_LD_WRITE:

		if (alt_status) {
			cmd->scmd->result = alt_status << 16;
			exception = 1;
		}

		if (exception) {

			atomic_dec(&instance->fw_outstanding);

			scsi_dma_unmap(cmd->scmd);
			cmd->scmd->scsi_done(cmd->scmd);
			megasas_return_cmd(instance, cmd);

			break;
		}

		switch (hdr->cmd_status) {

		case MFI_STAT_OK:
			cmd->scmd->result = DID_OK << 16;
			break;

		case MFI_STAT_SCSI_IO_FAILED:
		case MFI_STAT_LD_INIT_IN_PROGRESS:
			cmd->scmd->result =
			    (DID_ERROR << 16) | hdr->scsi_status;
			break;

		case MFI_STAT_SCSI_DONE_WITH_ERROR:

			cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status;

			if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) {
				memset(cmd->scmd->sense_buffer, 0,
				       SCSI_SENSE_BUFFERSIZE);
				memcpy(cmd->scmd->sense_buffer, cmd->sense,
				       hdr->sense_len);

				cmd->scmd->result |= DRIVER_SENSE << 24;
			}

			break;

		case MFI_STAT_LD_OFFLINE:
		case MFI_STAT_DEVICE_NOT_FOUND:
			cmd->scmd->result = DID_BAD_TARGET << 16;
			break;

		default:
			dev_printk(KERN_DEBUG, &instance->pdev->dev, "MFI FW status %#x\n",
			       hdr->cmd_status);
			cmd->scmd->result = DID_ERROR << 16;
			break;
		}

		atomic_dec(&instance->fw_outstanding);

		scsi_dma_unmap(cmd->scmd);
		cmd->scmd->scsi_done(cmd->scmd);
		megasas_return_cmd(instance, cmd);

		break;

	case MFI_CMD_SMP:
	case MFI_CMD_STP:
	case MFI_CMD_NVME:
	case MFI_CMD_TOOLBOX:
		megasas_complete_int_cmd(instance, cmd);
		break;

	case MFI_CMD_DCMD:
		opcode = le32_to_cpu(cmd->frame->dcmd.opcode);
		/* Check for LD map update */
		if ((opcode == MR_DCMD_LD_MAP_GET_INFO)
			&& (cmd->frame->dcmd.mbox.b[1] == 1)) {
			fusion->fast_path_io = 0;
			spin_lock_irqsave(instance->host->host_lock, flags);
			status = cmd->frame->hdr.cmd_status;
			instance->map_update_cmd = NULL;
			if (status != MFI_STAT_OK) {
				if (status != MFI_STAT_NOT_FOUND)
					dev_warn(&instance->pdev->dev, "map syncfailed, status = 0x%x\n",
					       cmd->frame->hdr.cmd_status);
				else {
					megasas_return_cmd(instance, cmd);
					spin_unlock_irqrestore(
						instance->host->host_lock,
						flags);
					break;
				}
			}

			megasas_return_cmd(instance, cmd);

			/*
			 * Set fast path IO to ZERO.
			 * Validate Map will set proper value.
			 * Meanwhile all IOs will go as LD IO.
			 */
			if (status == MFI_STAT_OK &&
			    (MR_ValidateMapInfo(instance, (instance->map_id + 1)))) {
				instance->map_id++;
				fusion->fast_path_io = 1;
			} else {
				fusion->fast_path_io = 0;
			}

			megasas_sync_map_info(instance);
			spin_unlock_irqrestore(instance->host->host_lock,
					       flags);
			break;
		}
		if (opcode == MR_DCMD_CTRL_EVENT_GET_INFO ||
		    opcode == MR_DCMD_CTRL_EVENT_GET) {
			spin_lock_irqsave(&poll_aen_lock, flags);
			megasas_poll_wait_aen = 0;
			spin_unlock_irqrestore(&poll_aen_lock, flags);
		}

		/* FW has an updated PD sequence */
		if ((opcode == MR_DCMD_SYSTEM_PD_MAP_GET_INFO) &&
			(cmd->frame->dcmd.mbox.b[0] == 1)) {

			spin_lock_irqsave(instance->host->host_lock, flags);
			status = cmd->frame->hdr.cmd_status;
			instance->jbod_seq_cmd = NULL;
			megasas_return_cmd(instance, cmd);

			if (status == MFI_STAT_OK) {
				instance->pd_seq_map_id++;
				/* Re-register a pd sync seq num cmd */
				if (megasas_sync_pd_seq_num(instance, true))
					instance->use_seqnum_jbod_fp = false;
			} else
				instance->use_seqnum_jbod_fp = false;

			spin_unlock_irqrestore(instance->host->host_lock, flags);
			break;
		}

		/*
		 * See if got an event notification
		 */
		if (opcode == MR_DCMD_CTRL_EVENT_WAIT)
			megasas_service_aen(instance, cmd);
		else
			megasas_complete_int_cmd(instance, cmd);

		break;

	case MFI_CMD_ABORT:
		/*
		 * Cmd issued to abort another cmd returned
		 */
		megasas_complete_abort(instance, cmd);
		break;

	default:
		dev_info(&instance->pdev->dev, "Unknown command completed! [0x%X]\n",
		       hdr->cmd);
		megasas_complete_int_cmd(instance, cmd);
		break;
	}
}

/**
 * megasas_issue_pending_cmds_again -	issue all pending cmds
 *					in FW again because of the fw reset
 * @instance:				Adapter soft state
 */
static inline void
megasas_issue_pending_cmds_again(struct megasas_instance *instance)
{
	struct megasas_cmd *cmd;
	struct list_head clist_local;
	union megasas_evt_class_locale class_locale;
	unsigned long flags;
	u32 seq_num;

	INIT_LIST_HEAD(&clist_local);
	spin_lock_irqsave(&instance->hba_lock, flags);
	list_splice_init(&instance->internal_reset_pending_q, &clist_local);
	spin_unlock_irqrestore(&instance->hba_lock, flags);

	while (!list_empty(&clist_local)) {
		cmd = list_entry((&clist_local)->next,
					struct megasas_cmd, list);
		list_del_init(&cmd->list);

		if (cmd->sync_cmd || cmd->scmd) {
			dev_notice(&instance->pdev->dev, "command %p, %p:%d"
				"detected to be pending while HBA reset\n",
					cmd, cmd->scmd, cmd->sync_cmd);

			cmd->retry_for_fw_reset++;

			if (cmd->retry_for_fw_reset == 3) {
				dev_notice(&instance->pdev->dev, "cmd %p, %p:%d"
					"was tried multiple times during reset."
					"Shutting down the HBA\n",
					cmd, cmd->scmd, cmd->sync_cmd);
				instance->instancet->disable_intr(instance);
				atomic_set(&instance->fw_reset_no_pci_access, 1);
				megaraid_sas_kill_hba(instance);
				return;
			}
		}

		if (cmd->sync_cmd == 1) {
			if (cmd->scmd) {
				dev_notice(&instance->pdev->dev, "unexpected"
					"cmd attached to internal command!\n");
			}
			dev_notice(&instance->pdev->dev, "%p synchronous cmd"
						"on the internal reset queue,"
						"issue it again.\n", cmd);
			cmd->cmd_status_drv = MFI_STAT_INVALID_STATUS;
			instance->instancet->fire_cmd(instance,
							cmd->frame_phys_addr,
							0, instance->reg_set);
		} else if (cmd->scmd) {
			dev_notice(&instance->pdev->dev, "%p scsi cmd [%02x]"
			"detected on the internal queue, issue again.\n",
			cmd, cmd->scmd->cmnd[0]);

			atomic_inc(&instance->fw_outstanding);
			instance->instancet->fire_cmd(instance,
					cmd->frame_phys_addr,
					cmd->frame_count-1, instance->reg_set);
		} else {
			dev_notice(&instance->pdev->dev, "%p unexpected cmd on the"
				"internal reset defer list while re-issue!!\n",
				cmd);
		}
	}

	if (instance->aen_cmd) {
		dev_notice(&instance->pdev->dev, "aen_cmd in def process\n");
		megasas_return_cmd(instance, instance->aen_cmd);

		instance->aen_cmd = NULL;
	}

	/*
	 * Initiate AEN (Asynchronous Event Notification)
	 */
	seq_num = instance->last_seq_num;
	class_locale.members.reserved = 0;
	class_locale.members.locale = MR_EVT_LOCALE_ALL;
	class_locale.members.class = MR_EVT_CLASS_DEBUG;

	megasas_register_aen(instance, seq_num, class_locale.word);
}

/**
 * Move the internal reset pending commands to a deferred queue.
 *
 * We move the commands pending at internal reset time to a
 * pending queue. This queue would be flushed after successful
 * completion of the internal reset sequence. if the internal reset
 * did not complete in time, the kernel reset handler would flush
 * these commands.
 **/
static void
megasas_internal_reset_defer_cmds(struct megasas_instance *instance)
{
	struct megasas_cmd *cmd;
	int i;
	u16 max_cmd = instance->max_fw_cmds;
	u32 defer_index;
	unsigned long flags;

	defer_index = 0;
	spin_lock_irqsave(&instance->mfi_pool_lock, flags);
	for (i = 0; i < max_cmd; i++) {
		cmd = instance->cmd_list[i];
		if (cmd->sync_cmd == 1 || cmd->scmd) {
			dev_notice(&instance->pdev->dev, "moving cmd[%d]:%p:%d:%p"
					"on the defer queue as internal\n",
				defer_index, cmd, cmd->sync_cmd, cmd->scmd);

			if (!list_empty(&cmd->list)) {
				dev_notice(&instance->pdev->dev, "ERROR while"
					" moving this cmd:%p, %d %p, it was"
					"discovered on some list?\n",
					cmd, cmd->sync_cmd, cmd->scmd);

				list_del_init(&cmd->list);
			}
			defer_index++;
			list_add_tail(&cmd->list,
				&instance->internal_reset_pending_q);
		}
	}
	spin_unlock_irqrestore(&instance->mfi_pool_lock, flags);
}


static void
process_fw_state_change_wq(struct work_struct *work)
{
	struct megasas_instance *instance =
		container_of(work, struct megasas_instance, work_init);
	u32 wait;
	unsigned long flags;

    if (atomic_read(&instance->adprecovery) != MEGASAS_ADPRESET_SM_INFAULT) {
		dev_notice(&instance->pdev->dev, "error, recovery st %x\n",
				atomic_read(&instance->adprecovery));
		return ;
	}

	if (atomic_read(&instance->adprecovery) == MEGASAS_ADPRESET_SM_INFAULT) {
		dev_notice(&instance->pdev->dev, "FW detected to be in fault"
					"state, restarting it...\n");

		instance->instancet->disable_intr(instance);
		atomic_set(&instance->fw_outstanding, 0);

		atomic_set(&instance->fw_reset_no_pci_access, 1);
		instance->instancet->adp_reset(instance, instance->reg_set);
		atomic_set(&instance->fw_reset_no_pci_access, 0);

		dev_notice(&instance->pdev->dev, "FW restarted successfully,"
					"initiating next stage...\n");

		dev_notice(&instance->pdev->dev, "HBA recovery state machine,"
					"state 2 starting...\n");

		/* waiting for about 20 second before start the second init */
		for (wait = 0; wait < 30; wait++) {
			msleep(1000);
		}

		if (megasas_transition_to_ready(instance, 1)) {
			dev_notice(&instance->pdev->dev, "adapter not ready\n");

			atomic_set(&instance->fw_reset_no_pci_access, 1);
			megaraid_sas_kill_hba(instance);
			return ;
		}

		if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
			(instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) ||
			(instance->pdev->device == PCI_DEVICE_ID_LSI_VERDE_ZCR)
			) {
			*instance->consumer = *instance->producer;
		} else {
			*instance->consumer = 0;
			*instance->producer = 0;
		}

		megasas_issue_init_mfi(instance);

		spin_lock_irqsave(&instance->hba_lock, flags);
		atomic_set(&instance->adprecovery, MEGASAS_HBA_OPERATIONAL);
		spin_unlock_irqrestore(&instance->hba_lock, flags);
		instance->instancet->enable_intr(instance);

		megasas_issue_pending_cmds_again(instance);
		instance->issuepend_done = 1;
	}
}

/**
 * megasas_deplete_reply_queue -	Processes all completed commands
 * @instance:				Adapter soft state
 * @alt_status:				Alternate status to be returned to
 *					SCSI mid-layer instead of the status
 *					returned by the FW
 * Note: this must be called with hba lock held
 */
static int
megasas_deplete_reply_queue(struct megasas_instance *instance,
					u8 alt_status)
{
	u32 mfiStatus;
	u32 fw_state;

	if ((mfiStatus = instance->instancet->check_reset(instance,
					instance->reg_set)) == 1) {
		return IRQ_HANDLED;
	}

	mfiStatus = instance->instancet->clear_intr(instance);
	if (mfiStatus == 0) {
		/* Hardware may not set outbound_intr_status in MSI-X mode */
		if (!instance->msix_vectors)
			return IRQ_NONE;
	}

	instance->mfiStatus = mfiStatus;

	if ((mfiStatus & MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE)) {
		fw_state = instance->instancet->read_fw_status_reg(
				instance) & MFI_STATE_MASK;

		if (fw_state != MFI_STATE_FAULT) {
			dev_notice(&instance->pdev->dev, "fw state:%x\n",
						fw_state);
		}

		if ((fw_state == MFI_STATE_FAULT) &&
				(instance->disableOnlineCtrlReset == 0)) {
			dev_notice(&instance->pdev->dev, "wait adp restart\n");

			if ((instance->pdev->device ==
					PCI_DEVICE_ID_LSI_SAS1064R) ||
				(instance->pdev->device ==
					PCI_DEVICE_ID_DELL_PERC5) ||
				(instance->pdev->device ==
					PCI_DEVICE_ID_LSI_VERDE_ZCR)) {

				*instance->consumer =
					cpu_to_le32(MEGASAS_ADPRESET_INPROG_SIGN);
			}


			instance->instancet->disable_intr(instance);
			atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_INFAULT);
			instance->issuepend_done = 0;

			atomic_set(&instance->fw_outstanding, 0);
			megasas_internal_reset_defer_cmds(instance);

			dev_notice(&instance->pdev->dev, "fwState=%x, stage:%d\n",
					fw_state, atomic_read(&instance->adprecovery));

			schedule_work(&instance->work_init);
			return IRQ_HANDLED;

		} else {
			dev_notice(&instance->pdev->dev, "fwstate:%x, dis_OCR=%x\n",
				fw_state, instance->disableOnlineCtrlReset);
		}
	}

	tasklet_schedule(&instance->isr_tasklet);
	return IRQ_HANDLED;
}
/**
 * megasas_isr - isr entry point
 */
static irqreturn_t megasas_isr(int irq, void *devp)
{
	struct megasas_irq_context *irq_context = devp;
	struct megasas_instance *instance = irq_context->instance;
	unsigned long flags;
	irqreturn_t rc;

	if (atomic_read(&instance->fw_reset_no_pci_access))
		return IRQ_HANDLED;

	spin_lock_irqsave(&instance->hba_lock, flags);
	rc = megasas_deplete_reply_queue(instance, DID_OK);
	spin_unlock_irqrestore(&instance->hba_lock, flags);

	return rc;
}

/**
 * megasas_transition_to_ready -	Move the FW to READY state
 * @instance:				Adapter soft state
 *
 * During the initialization, FW passes can potentially be in any one of
 * several possible states. If the FW in operational, waiting-for-handshake
 * states, driver must take steps to bring it to ready state. Otherwise, it
 * has to wait for the ready state.
 */
int
megasas_transition_to_ready(struct megasas_instance *instance, int ocr)
{
	int i;
	u8 max_wait;
	u32 fw_state;
	u32 abs_state, curr_abs_state;

	abs_state = instance->instancet->read_fw_status_reg(instance);
	fw_state = abs_state & MFI_STATE_MASK;

	if (fw_state != MFI_STATE_READY)
		dev_info(&instance->pdev->dev, "Waiting for FW to come to ready"
		       " state\n");

	while (fw_state != MFI_STATE_READY) {

		switch (fw_state) {

		case MFI_STATE_FAULT:
			dev_printk(KERN_ERR, &instance->pdev->dev,
				   "FW in FAULT state, Fault code:0x%x subcode:0x%x func:%s\n",
				   abs_state & MFI_STATE_FAULT_CODE,
				   abs_state & MFI_STATE_FAULT_SUBCODE, __func__);
			if (ocr) {
				max_wait = MEGASAS_RESET_WAIT_TIME;
				break;
			} else {
				dev_printk(KERN_DEBUG, &instance->pdev->dev, "System Register set:\n");
				megasas_dump_reg_set(instance->reg_set);
				return -ENODEV;
			}

		case MFI_STATE_WAIT_HANDSHAKE:
			/*
			 * Set the CLR bit in inbound doorbell
			 */
			if ((instance->pdev->device ==
				PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
				(instance->pdev->device ==
				 PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
				(instance->adapter_type != MFI_SERIES))
				writel(
				  MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
				  &instance->reg_set->doorbell);
			else
				writel(
				    MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
					&instance->reg_set->inbound_doorbell);

			max_wait = MEGASAS_RESET_WAIT_TIME;
			break;

		case MFI_STATE_BOOT_MESSAGE_PENDING:
			if ((instance->pdev->device ==
			     PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
				(instance->pdev->device ==
				 PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
				(instance->adapter_type != MFI_SERIES))
				writel(MFI_INIT_HOTPLUG,
				       &instance->reg_set->doorbell);
			else
				writel(MFI_INIT_HOTPLUG,
					&instance->reg_set->inbound_doorbell);

			max_wait = MEGASAS_RESET_WAIT_TIME;
			break;

		case MFI_STATE_OPERATIONAL:
			/*
			 * Bring it to READY state; assuming max wait 10 secs
			 */
			instance->instancet->disable_intr(instance);
			if ((instance->pdev->device ==
				PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
				(instance->pdev->device ==
				PCI_DEVICE_ID_LSI_SAS0071SKINNY)  ||
				(instance->adapter_type != MFI_SERIES)) {
				writel(MFI_RESET_FLAGS,
					&instance->reg_set->doorbell);

				if (instance->adapter_type != MFI_SERIES) {
					for (i = 0; i < (10 * 1000); i += 20) {
						if (megasas_readl(
							    instance,
							    &instance->
							    reg_set->
							    doorbell) & 1)
							msleep(20);
						else
							break;
					}
				}
			} else
				writel(MFI_RESET_FLAGS,
					&instance->reg_set->inbound_doorbell);

			max_wait = MEGASAS_RESET_WAIT_TIME;
			break;

		case MFI_STATE_UNDEFINED:
			/*
			 * This state should not last for more than 2 seconds
			 */
			max_wait = MEGASAS_RESET_WAIT_TIME;
			break;

		case MFI_STATE_BB_INIT:
			max_wait = MEGASAS_RESET_WAIT_TIME;
			break;

		case MFI_STATE_FW_INIT:
			max_wait = MEGASAS_RESET_WAIT_TIME;
			break;

		case MFI_STATE_FW_INIT_2:
			max_wait = MEGASAS_RESET_WAIT_TIME;
			break;

		case MFI_STATE_DEVICE_SCAN:
			max_wait = MEGASAS_RESET_WAIT_TIME;
			break;

		case MFI_STATE_FLUSH_CACHE:
			max_wait = MEGASAS_RESET_WAIT_TIME;
			break;

		default:
			dev_printk(KERN_DEBUG, &instance->pdev->dev, "Unknown state 0x%x\n",
			       fw_state);
			dev_printk(KERN_DEBUG, &instance->pdev->dev, "System Register set:\n");
			megasas_dump_reg_set(instance->reg_set);
			return -ENODEV;
		}

		/*
		 * The cur_state should not last for more than max_wait secs
		 */
		for (i = 0; i < max_wait * 50; i++) {
			curr_abs_state = instance->instancet->
				read_fw_status_reg(instance);

			if (abs_state == curr_abs_state) {
				msleep(20);
			} else
				break;
		}

		/*
		 * Return error if fw_state hasn't changed after max_wait
		 */
		if (curr_abs_state == abs_state) {
			dev_printk(KERN_DEBUG, &instance->pdev->dev, "FW state [%d] hasn't changed "
			       "in %d secs\n", fw_state, max_wait);
			dev_printk(KERN_DEBUG, &instance->pdev->dev, "System Register set:\n");
			megasas_dump_reg_set(instance->reg_set);
			return -ENODEV;
		}

		abs_state = curr_abs_state;
		fw_state = curr_abs_state & MFI_STATE_MASK;
	}
	dev_info(&instance->pdev->dev, "FW now in Ready state\n");

	return 0;
}

/**
 * megasas_teardown_frame_pool -	Destroy the cmd frame DMA pool
 * @instance:				Adapter soft state
 */
static void megasas_teardown_frame_pool(struct megasas_instance *instance)
{
	int i;
	u16 max_cmd = instance->max_mfi_cmds;
	struct megasas_cmd *cmd;

	if (!instance->frame_dma_pool)
		return;

	/*
	 * Return all frames to pool
	 */
	for (i = 0; i < max_cmd; i++) {

		cmd = instance->cmd_list[i];

		if (cmd->frame)
			dma_pool_free(instance->frame_dma_pool, cmd->frame,
				      cmd->frame_phys_addr);

		if (cmd->sense)
			dma_pool_free(instance->sense_dma_pool, cmd->sense,
				      cmd->sense_phys_addr);
	}

	/*
	 * Now destroy the pool itself
	 */
	dma_pool_destroy(instance->frame_dma_pool);
	dma_pool_destroy(instance->sense_dma_pool);

	instance->frame_dma_pool = NULL;
	instance->sense_dma_pool = NULL;
}

/**
 * megasas_create_frame_pool -	Creates DMA pool for cmd frames
 * @instance:			Adapter soft state
 *
 * Each command packet has an embedded DMA memory buffer that is used for
 * filling MFI frame and the SG list that immediately follows the frame. This
 * function creates those DMA memory buffers for each command packet by using
 * PCI pool facility.
 */
static int megasas_create_frame_pool(struct megasas_instance *instance)
{
	int i;
	u16 max_cmd;
	u32 frame_count;
	struct megasas_cmd *cmd;

	max_cmd = instance->max_mfi_cmds;

	/*
	 * For MFI controllers.
	 * max_num_sge = 60
	 * max_sge_sz  = 16 byte (sizeof megasas_sge_skinny)
	 * Total 960 byte (15 MFI frame of 64 byte)
	 *
	 * Fusion adapter require only 3 extra frame.
	 * max_num_sge = 16 (defined as MAX_IOCTL_SGE)
	 * max_sge_sz  = 12 byte (sizeof  megasas_sge64)
	 * Total 192 byte (3 MFI frame of 64 byte)
	 */
	frame_count = (instance->adapter_type == MFI_SERIES) ?
			(15 + 1) : (3 + 1);
	instance->mfi_frame_size = MEGAMFI_FRAME_SIZE * frame_count;
	/*
	 * Use DMA pool facility provided by PCI layer
	 */
	instance->frame_dma_pool = dma_pool_create("megasas frame pool",
					&instance->pdev->dev,
					instance->mfi_frame_size, 256, 0);

	if (!instance->frame_dma_pool) {
		dev_printk(KERN_DEBUG, &instance->pdev->dev, "failed to setup frame pool\n");
		return -ENOMEM;
	}

	instance->sense_dma_pool = dma_pool_create("megasas sense pool",
						   &instance->pdev->dev, 128,
						   4, 0);

	if (!instance->sense_dma_pool) {
		dev_printk(KERN_DEBUG, &instance->pdev->dev, "failed to setup sense pool\n");

		dma_pool_destroy(instance->frame_dma_pool);
		instance->frame_dma_pool = NULL;

		return -ENOMEM;
	}

	/*
	 * Allocate and attach a frame to each of the commands in cmd_list.
	 * By making cmd->index as the context instead of the &cmd, we can
	 * always use 32bit context regardless of the architecture
	 */
	for (i = 0; i < max_cmd; i++) {

		cmd = instance->cmd_list[i];

		cmd->frame = dma_pool_zalloc(instance->frame_dma_pool,
					    GFP_KERNEL, &cmd->frame_phys_addr);

		cmd->sense = dma_pool_alloc(instance->sense_dma_pool,
					    GFP_KERNEL, &cmd->sense_phys_addr);

		/*
		 * megasas_teardown_frame_pool() takes care of freeing
		 * whatever has been allocated
		 */
		if (!cmd->frame || !cmd->sense) {
			dev_printk(KERN_DEBUG, &instance->pdev->dev, "dma_pool_alloc failed\n");
			megasas_teardown_frame_pool(instance);
			return -ENOMEM;
		}

		cmd->frame->io.context = cpu_to_le32(cmd->index);
		cmd->frame->io.pad_0 = 0;
		if ((instance->adapter_type == MFI_SERIES) && reset_devices)
			cmd->frame->hdr.cmd = MFI_CMD_INVALID;
	}

	return 0;
}

/**
 * megasas_free_cmds -	Free all the cmds in the free cmd pool
 * @instance:		Adapter soft state
 */
void megasas_free_cmds(struct megasas_instance *instance)
{
	int i;

	/* First free the MFI frame pool */
	megasas_teardown_frame_pool(instance);

	/* Free all the commands in the cmd_list */
	for (i = 0; i < instance->max_mfi_cmds; i++)

		kfree(instance->cmd_list[i]);

	/* Free the cmd_list buffer itself */
	kfree(instance->cmd_list);
	instance->cmd_list = NULL;

	INIT_LIST_HEAD(&instance->cmd_pool);
}

/**
 * megasas_alloc_cmds -	Allocates the command packets
 * @instance:		Adapter soft state
 *
 * Each command that is issued to the FW, whether IO commands from the OS or
 * internal commands like IOCTLs, are wrapped in local data structure called
 * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
 * the FW.
 *
 * Each frame has a 32-bit field called context (tag). This context is used
 * to get back the megasas_cmd from the frame when a frame gets completed in
 * the ISR. Typically the address of the megasas_cmd itself would be used as
 * the context. But we wanted to keep the differences between 32 and 64 bit
 * systems to the mininum. We always use 32 bit integers for the context. In
 * this driver, the 32 bit values are the indices into an array cmd_list.
 * This array is used only to look up the megasas_cmd given the context. The
 * free commands themselves are maintained in a linked list called cmd_pool.
 */
int megasas_alloc_cmds(struct megasas_instance *instance)
{
	int i;
	int j;
	u16 max_cmd;
	struct megasas_cmd *cmd;

	max_cmd = instance->max_mfi_cmds;

	/*
	 * instance->cmd_list is an array of struct megasas_cmd pointers.
	 * Allocate the dynamic array first and then allocate individual
	 * commands.
	 */
	instance->cmd_list = kcalloc(max_cmd, sizeof(struct megasas_cmd*), GFP_KERNEL);

	if (!instance->cmd_list) {
		dev_printk(KERN_DEBUG, &instance->pdev->dev, "out of memory\n");
		return -ENOMEM;
	}

	memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) *max_cmd);

	for (i = 0; i < max_cmd; i++) {
		instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd),
						GFP_KERNEL);

		if (!instance->cmd_list[i]) {

			for (j = 0; j < i; j++)
				kfree(instance->cmd_list[j]);

			kfree(instance->cmd_list);
			instance->cmd_list = NULL;

			return -ENOMEM;
		}
	}

	for (i = 0; i < max_cmd; i++) {
		cmd = instance->cmd_list[i];
		memset(cmd, 0, sizeof(struct megasas_cmd));
		cmd->index = i;
		cmd->scmd = NULL;
		cmd->instance = instance;

		list_add_tail(&cmd->list, &instance->cmd_pool);
	}

	/*
	 * Create a frame pool and assign one frame to each cmd
	 */
	if (megasas_create_frame_pool(instance)) {
		dev_printk(KERN_DEBUG, &instance->pdev->dev, "Error creating frame DMA pool\n");
		megasas_free_cmds(instance);
		return -ENOMEM;
	}

	return 0;
}

/*
 * dcmd_timeout_ocr_possible -	Check if OCR is possible based on Driver/FW state.
 * @instance:				Adapter soft state
 *
 * Return 0 for only Fusion adapter, if driver load/unload is not in progress
 * or FW is not under OCR.
 */
inline int
dcmd_timeout_ocr_possible(struct megasas_instance *instance) {

	if (instance->adapter_type == MFI_SERIES)
		return KILL_ADAPTER;
	else if (instance->unload ||
			test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags))
		return IGNORE_TIMEOUT;
	else
		return INITIATE_OCR;
}

static void
megasas_get_pd_info(struct megasas_instance *instance, struct scsi_device *sdev)
{
	int ret;
	struct megasas_cmd *cmd;
	struct megasas_dcmd_frame *dcmd;

	struct MR_PRIV_DEVICE *mr_device_priv_data;
	u16 device_id = 0;

	device_id = (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) + sdev->id;
	cmd = megasas_get_cmd(instance);

	if (!cmd) {
		dev_err(&instance->pdev->dev, "Failed to get cmd %s\n", __func__);
		return;
	}

	dcmd = &cmd->frame->dcmd;

	memset(instance->pd_info, 0, sizeof(*instance->pd_info));
	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);

	dcmd->mbox.s[0] = cpu_to_le16(device_id);
	dcmd->cmd = MFI_CMD_DCMD;
	dcmd->cmd_status = 0xFF;
	dcmd->sge_count = 1;
	dcmd->flags = MFI_FRAME_DIR_READ;
	dcmd->timeout = 0;
	dcmd->pad_0 = 0;
	dcmd->data_xfer_len = cpu_to_le32(sizeof(struct MR_PD_INFO));
	dcmd->opcode = cpu_to_le32(MR_DCMD_PD_GET_INFO);

	megasas_set_dma_settings(instance, dcmd, instance->pd_info_h,
				 sizeof(struct MR_PD_INFO));

	if ((instance->adapter_type != MFI_SERIES) &&
	    !instance->mask_interrupts)
		ret = megasas_issue_blocked_cmd(instance, cmd, MFI_IO_TIMEOUT_SECS);
	else
		ret = megasas_issue_polled(instance, cmd);

	switch (ret) {
	case DCMD_SUCCESS:
		mr_device_priv_data = sdev->hostdata;
		le16_to_cpus((u16 *)&instance->pd_info->state.ddf.pdType);
		mr_device_priv_data->interface_type =
				instance->pd_info->state.ddf.pdType.intf;
		break;

	case DCMD_TIMEOUT:

		switch (dcmd_timeout_ocr_possible(instance)) {
		case INITIATE_OCR:
			cmd->flags |= DRV_DCMD_SKIP_REFIRE;
			mutex_unlock(&instance->reset_mutex);
			megasas_reset_fusion(instance->host,
				MFI_IO_TIMEOUT_OCR);
			mutex_lock(&instance->reset_mutex);
			break;
		case KILL_ADAPTER:
			megaraid_sas_kill_hba(instance);
			break;
		case IGNORE_TIMEOUT:
			dev_info(&instance->pdev->dev, "Ignore DCMD timeout: %s %d\n",
				__func__, __LINE__);
			break;
		}

		break;
	}

	if (ret != DCMD_TIMEOUT)
		megasas_return_cmd(instance, cmd);

	return;
}
/*
 * megasas_get_pd_list_info -	Returns FW's pd_list structure
 * @instance:				Adapter soft state
 * @pd_list:				pd_list structure
 *
 * Issues an internal command (DCMD) to get the FW's controller PD
 * list structure.  This information is mainly used to find out SYSTEM
 * supported by the FW.
 */
static int
megasas_get_pd_list(struct megasas_instance *instance)
{
	int ret = 0, pd_index = 0;
	struct megasas_cmd *cmd;
	struct megasas_dcmd_frame *dcmd;
	struct MR_PD_LIST *ci;
	struct MR_PD_ADDRESS *pd_addr;

	if (instance->pd_list_not_supported) {
		dev_info(&instance->pdev->dev, "MR_DCMD_PD_LIST_QUERY "
		"not supported by firmware\n");
		return ret;
	}

	ci = instance->pd_list_buf;

	cmd = megasas_get_cmd(instance);

	if (!cmd) {
		dev_printk(KERN_DEBUG, &instance->pdev->dev, "(get_pd_list): Failed to get cmd\n");
		return -ENOMEM;
	}

	dcmd = &cmd->frame->dcmd;

	memset(ci, 0, sizeof(*ci));
	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);

	dcmd->mbox.b[0] = MR_PD_QUERY_TYPE_EXPOSED_TO_HOST;
	dcmd->mbox.b[1] = 0;
	dcmd->cmd = MFI_CMD_DCMD;
	dcmd->cmd_status = MFI_STAT_INVALID_STATUS;
	dcmd->sge_count = 1;
	dcmd->flags = MFI_FRAME_DIR_READ;
	dcmd->timeout = 0;
	dcmd->pad_0 = 0;
	dcmd->data_xfer_len = cpu_to_le32(MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST));
	dcmd->opcode = cpu_to_le32(MR_DCMD_PD_LIST_QUERY);

	megasas_set_dma_settings(instance, dcmd, instance->pd_list_buf_h,
				 (MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST)));

	if ((instance->adapter_type != MFI_SERIES) &&
	    !instance->mask_interrupts)
		ret = megasas_issue_blocked_cmd(instance, cmd,
			MFI_IO_TIMEOUT_SECS);
	else
		ret = megasas_issue_polled(instance, cmd);

	switch (ret) {
	case DCMD_FAILED:
		dev_info(&instance->pdev->dev, "MR_DCMD_PD_LIST_QUERY "
			"failed/not supported by firmware\n");

		if (instance->adapter_type != MFI_SERIES)
			megaraid_sas_kill_hba(instance);
		else
			instance->pd_list_not_supported = 1;
		break;
	case DCMD_TIMEOUT:

		switch (dcmd_timeout_ocr_possible(instance)) {
		case INITIATE_OCR:
			cmd->flags |= DRV_DCMD_SKIP_REFIRE;
			/*
			 * DCMD failed from AEN path.
			 * AEN path already hold reset_mutex to avoid PCI access
			 * while OCR is in progress.
			 */
			mutex_unlock(&instance->reset_mutex);
			megasas_reset_fusion(instance->host,
						MFI_IO_TIMEOUT_OCR);
			mutex_lock(&instance->reset_mutex);
			break;
		case KILL_ADAPTER:
			megaraid_sas_kill_hba(instance);
			break;
		case IGNORE_TIMEOUT:
			dev_info(&instance->pdev->dev, "Ignore DCMD timeout: %s %d \n",
				__func__, __LINE__);
			break;
		}

		break;

	case DCMD_SUCCESS:
		pd_addr = ci->addr;
		if (megasas_dbg_lvl & LD_PD_DEBUG)
			dev_info(&instance->pdev->dev, "%s, sysPD count: 0x%x\n",
				 __func__, le32_to_cpu(ci->count));

		if ((le32_to_cpu(ci->count) >
			(MEGASAS_MAX_PD_CHANNELS * MEGASAS_MAX_DEV_PER_CHANNEL)))
			break;

		memset(instance->local_pd_list, 0,
				MEGASAS_MAX_PD * sizeof(struct megasas_pd_list));

		for (pd_index = 0; pd_index < le32_to_cpu(ci->count); pd_index++) {
			instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].tid	=
					le16_to_cpu(pd_addr->deviceId);
			instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].driveType	=
					pd_addr->scsiDevType;
			instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].driveState	=
					MR_PD_STATE_SYSTEM;
			if (megasas_dbg_lvl & LD_PD_DEBUG)
				dev_info(&instance->pdev->dev,
					 "PD%d: targetID: 0x%03x deviceType:0x%x\n",
					 pd_index, le16_to_cpu(pd_addr->deviceId),
					 pd_addr->scsiDevType);
			pd_addr++;
		}

		memcpy(instance->pd_list, instance->local_pd_list,
			sizeof(instance->pd_list));
		break;

	}

	if (ret != DCMD_TIMEOUT)
		megasas_return_cmd(instance, cmd);

	return ret;
}

/*
 * megasas_get_ld_list_info -	Returns FW's ld_list structure
 * @instance:				Adapter soft state
 * @ld_list:				ld_list structure
 *
 * Issues an internal command (DCMD) to get the FW's controller PD
 * list structure.  This information is mainly used to find out SYSTEM
 * supported by the FW.
 */
static int
megasas_get_ld_list(struct megasas_instance *instance)
{
	int ret = 0, ld_index = 0, ids = 0;
	struct megasas_cmd *cmd;
	struct megasas_dcmd_frame *dcmd;
	struct MR_LD_LIST *ci;
	dma_addr_t ci_h = 0;
	u32 ld_count;

	ci = instance->ld_list_buf;
	ci_h = instance->ld_list_buf_h;

	cmd = megasas_get_cmd(instance);

	if (!cmd) {
		dev_printk(KERN_DEBUG, &instance->pdev->dev, "megasas_get_ld_list: Failed to get cmd\n");
		return -ENOMEM;
	}

	dcmd = &cmd->frame->dcmd;

	memset(ci, 0, sizeof(*ci));
	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);

	if (instance->supportmax256vd)
		dcmd->mbox.b[0] = 1;
	dcmd->cmd = MFI_CMD_DCMD;
	dcmd->cmd_status = MFI_STAT_INVALID_STATUS;
	dcmd->sge_count = 1;
	dcmd->flags = MFI_FRAME_DIR_READ;
	dcmd->timeout = 0;
	dcmd->data_xfer_len = cpu_to_le32(sizeof(struct MR_LD_LIST));
	dcmd->opcode = cpu_to_le32(MR_DCMD_LD_GET_LIST);
	dcmd->pad_0  = 0;

	megasas_set_dma_settings(instance, dcmd, ci_h,
				 sizeof(struct MR_LD_LIST));

	if ((instance->adapter_type != MFI_SERIES) &&
	    !instance->mask_interrupts)
		ret = megasas_issue_blocked_cmd(instance, cmd,
			MFI_IO_TIMEOUT_SECS);
	else
		ret = megasas_issue_polled(instance, cmd);

	ld_count = le32_to_cpu(ci->ldCount);

	switch (ret) {
	case DCMD_FAILED:
		megaraid_sas_kill_hba(instance);
		break;
	case DCMD_TIMEOUT:

		switch (dcmd_timeout_ocr_possible(instance)) {
		case INITIATE_OCR:
			cmd->flags |= DRV_DCMD_SKIP_REFIRE;
			/*
			 * DCMD failed from AEN path.
			 * AEN path already hold reset_mutex to avoid PCI access
			 * while OCR is in progress.
			 */
			mutex_unlock(&instance->reset_mutex);
			megasas_reset_fusion(instance->host,
						MFI_IO_TIMEOUT_OCR);
			mutex_lock(&instance->reset_mutex);
			break;
		case KILL_ADAPTER:
			megaraid_sas_kill_hba(instance);
			break;
		case IGNORE_TIMEOUT:
			dev_info(&instance->pdev->dev, "Ignore DCMD timeout: %s %d\n",
				__func__, __LINE__);
			break;
		}

		break;

	case DCMD_SUCCESS:
		if (megasas_dbg_lvl & LD_PD_DEBUG)
			dev_info(&instance->pdev->dev, "%s, LD count: 0x%x\n",
				 __func__, ld_count);

		if (ld_count > instance->fw_supported_vd_count)
			break;

		memset(instance->ld_ids, 0xff, MAX_LOGICAL_DRIVES_EXT);

		for (ld_index = 0; ld_index < ld_count; ld_index++) {
			if (ci->ldList[ld_index].state != 0) {
				ids = ci->ldList[ld_index].ref.targetId;
				instance->ld_ids[ids] = ci->ldList[ld_index].ref.targetId;
				if (megasas_dbg_lvl & LD_PD_DEBUG)
					dev_info(&instance->pdev->dev,
						 "LD%d: targetID: 0x%03x\n",
						 ld_index, ids);
			}
		}

		break;
	}

	if (ret != DCMD_TIMEOUT)
		megasas_return_cmd(instance, cmd);

	return ret;
}

/**
 * megasas_ld_list_query -	Returns FW's ld_list structure
 * @instance:				Adapter soft state
 * @ld_list:				ld_list structure
 *
 * Issues an internal command (DCMD) to get the FW's controller PD
 * list structure.  This information is mainly used to find out SYSTEM
 * supported by the FW.
 */
static int
megasas_ld_list_query(struct megasas_instance *instance, u8 query_type)
{
	int ret = 0, ld_index = 0, ids = 0;
	struct megasas_cmd *cmd;
	struct megasas_dcmd_frame *dcmd;
	struct MR_LD_TARGETID_LIST *ci;
	dma_addr_t ci_h = 0;
	u32 tgtid_count;

	ci = instance->ld_targetid_list_buf;
	ci_h = instance->ld_targetid_list_buf_h;

	cmd = megasas_get_cmd(instance);

	if (!cmd) {
		dev_warn(&instance->pdev->dev,
		         "megasas_ld_list_query: Failed to get cmd\n");
		return -ENOMEM;
	}

	dcmd = &cmd->frame->dcmd;

	memset(ci, 0, sizeof(*ci));
	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);

	dcmd->mbox.b[0] = query_type;
	if (instance->supportmax256vd)
		dcmd->mbox.b[2] = 1;

	dcmd->cmd = MFI_CMD_DCMD;
	dcmd->cmd_status = MFI_STAT_INVALID_STATUS;
	dcmd->sge_count = 1;
	dcmd->flags = MFI_FRAME_DIR_READ;
	dcmd->timeout = 0;
	dcmd->data_xfer_len = cpu_to_le32(sizeof(struct MR_LD_TARGETID_LIST));
	dcmd->opcode = cpu_to_le32(MR_DCMD_LD_LIST_QUERY);
	dcmd->pad_0  = 0;

	megasas_set_dma_settings(instance, dcmd, ci_h,
				 sizeof(struct MR_LD_TARGETID_LIST));

	if ((instance->adapter_type != MFI_SERIES) &&
	    !instance->mask_interrupts)
		ret = megasas_issue_blocked_cmd(instance, cmd, MFI_IO_TIMEOUT_SECS);
	else
		ret = megasas_issue_polled(instance, cmd);

	switch (ret) {
	case DCMD_FAILED:
		dev_info(&instance->pdev->dev,
			"DCMD not supported by firmware - %s %d\n",
				__func__, __LINE__);
		ret = megasas_get_ld_list(instance);
		break;
	case DCMD_TIMEOUT:
		switch (dcmd_timeout_ocr_possible(instance)) {
		case INITIATE_OCR:
			cmd->flags |= DRV_DCMD_SKIP_REFIRE;
			/*
			 * DCMD failed from AEN path.
			 * AEN path already hold reset_mutex to avoid PCI access
			 * while OCR is in progress.
			 */
			mutex_unlock(&instance->reset_mutex);
			megasas_reset_fusion(instance->host,
						MFI_IO_TIMEOUT_OCR);
			mutex_lock(&instance->reset_mutex);
			break;
		case KILL_ADAPTER:
			megaraid_sas_kill_hba(instance);
			break;
		case IGNORE_TIMEOUT:
			dev_info(&instance->pdev->dev, "Ignore DCMD timeout: %s %d\n",
				__func__, __LINE__);
			break;
		}

		break;
	case DCMD_SUCCESS:
		tgtid_count = le32_to_cpu(ci->count);

		if (megasas_dbg_lvl & LD_PD_DEBUG)
			dev_info(&instance->pdev->dev, "%s, LD count: 0x%x\n",
				 __func__, tgtid_count);

		if ((tgtid_count > (instance->fw_supported_vd_count)))
			break;

		memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
		for (ld_index = 0; ld_index < tgtid_count; ld_index++) {
			ids = ci->targetId[ld_index];
			instance->ld_ids[ids] = ci->targetId[ld_index];
			if (megasas_dbg_lvl & LD_PD_DEBUG)
				dev_info(&instance->pdev->dev, "LD%d: targetID: 0x%03x\n",
					 ld_index, ci->targetId[ld_index]);
		}

		break;
	}

	if (ret != DCMD_TIMEOUT)
		megasas_return_cmd(instance, cmd);

	return ret;
}

/**
 * dcmd.opcode            - MR_DCMD_CTRL_DEVICE_LIST_GET
 * dcmd.mbox              - reserved
 * dcmd.sge IN            - ptr to return MR_HOST_DEVICE_LIST structure
 * Desc:    This DCMD will return the combined device list
 * Status:  MFI_STAT_OK - List returned successfully
 *          MFI_STAT_INVALID_CMD - Firmware support for the feature has been
 *                                 disabled
 * @instance:			Adapter soft state
 * @is_probe:			Driver probe check
 * Return:			0 if DCMD succeeded
 *				 non-zero if failed
 */
static int
megasas_host_device_list_query(struct megasas_instance *instance,
			       bool is_probe)
{
	int ret, i, target_id;
	struct megasas_cmd *cmd;
	struct megasas_dcmd_frame *dcmd;
	struct MR_HOST_DEVICE_LIST *ci;
	u32 count;
	dma_addr_t ci_h;

	ci = instance->host_device_list_buf;
	ci_h = instance->host_device_list_buf_h;

	cmd = megasas_get_cmd(instance);

	if (!cmd) {
		dev_warn(&instance->pdev->dev,
			 "%s: failed to get cmd\n",
			 __func__);
		return -ENOMEM;
	}

	dcmd = &cmd->frame->dcmd;

	memset(ci, 0, sizeof(*ci));
	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);

	dcmd->mbox.b[0] = is_probe ? 0 : 1;
	dcmd->cmd = MFI_CMD_DCMD;
	dcmd->cmd_status = MFI_STAT_INVALID_STATUS;
	dcmd->sge_count = 1;
	dcmd->flags = MFI_FRAME_DIR_READ;
	dcmd->timeout = 0;
	dcmd->pad_0 = 0;
	dcmd->data_xfer_len = cpu_to_le32(HOST_DEVICE_LIST_SZ);
	dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_DEVICE_LIST_GET);

	megasas_set_dma_settings(instance, dcmd, ci_h, HOST_DEVICE_LIST_SZ);

	if (!instance->mask_interrupts) {
		ret = megasas_issue_blocked_cmd(instance, cmd,
						MFI_IO_TIMEOUT_SECS);
	} else {
		ret = megasas_issue_polled(instance, cmd);
		cmd->flags |= DRV_DCMD_SKIP_REFIRE;
	}

	switch (ret) {
	case DCMD_SUCCESS:
		/* Fill the internal pd_list and ld_ids array based on
		 * targetIds returned by FW
		 */
		count = le32_to_cpu(ci->count);

		if (count > (MEGASAS_MAX_PD + MAX_LOGICAL_DRIVES_EXT))
			break;

		if (megasas_dbg_lvl & LD_PD_DEBUG)
			dev_info(&instance->pdev->dev, "%s, Device count: 0x%x\n",
				 __func__, count);

		memset(instance->local_pd_list, 0,
		       MEGASAS_MAX_PD * sizeof(struct megasas_pd_list));
		memset(instance->ld_ids, 0xff, MAX_LOGICAL_DRIVES_EXT);
		for (i = 0; i < count; i++) {
			target_id = le16_to_cpu(ci->host_device_list[i].target_id);
			if (ci->host_device_list[i].flags.u.bits.is_sys_pd) {
				instance->local_pd_list[target_id].tid = target_id;
				instance->local_pd_list[target_id].driveType =
						ci->host_device_list[i].scsi_type;
				instance->local_pd_list[target_id].driveState =
						MR_PD_STATE_SYSTEM;
				if (megasas_dbg_lvl & LD_PD_DEBUG)
					dev_info(&instance->pdev->dev,
						 "Device %d: PD targetID: 0x%03x deviceType:0x%x\n",
						 i, target_id, ci->host_device_list[i].scsi_type);
			} else {
				instance->ld_ids[target_id] = target_id;
				if (megasas_dbg_lvl & LD_PD_DEBUG)
					dev_info(&instance->pdev->dev,
						 "Device %d: LD targetID: 0x%03x\n",
						 i, target_id);
			}
		}

		memcpy(instance->pd_list, instance->local_pd_list,
		       sizeof(instance->pd_list));
		break;

	case DCMD_TIMEOUT:
		switch (dcmd_timeout_ocr_possible(instance)) {
		case INITIATE_OCR:
			cmd->flags |= DRV_DCMD_SKIP_REFIRE;
			mutex_unlock(&instance->reset_mutex);
			megasas_reset_fusion(instance->host,
				MFI_IO_TIMEOUT_OCR);
			mutex_lock(&instance->reset_mutex);
			break;
		case KILL_ADAPTER:
			megaraid_sas_kill_hba(instance);
			break;
		case IGNORE_TIMEOUT:
			dev_info(&instance->pdev->dev, "Ignore DCMD timeout: %s %d\n",
				 __func__, __LINE__);
			break;
		}
		break;
	case DCMD_FAILED:
		dev_err(&instance->pdev->dev,
			"%s: MR_DCMD_CTRL_DEVICE_LIST_GET failed\n",
			__func__);
		break;
	}

	if (ret != DCMD_TIMEOUT)
		megasas_return_cmd(instance, cmd);

	return ret;
}

/*
 * megasas_update_ext_vd_details : Update details w.r.t Extended VD
 * instance			 : Controller's instance
*/
static void megasas_update_ext_vd_details(struct megasas_instance *instance)
{
	struct fusion_context *fusion;
	u32 ventura_map_sz = 0;

	fusion = instance->ctrl_context;
	/* For MFI based controllers return dummy success */
	if (!fusion)
		return;

	instance->supportmax256vd =
		instance->ctrl_info_buf->adapterOperations3.supportMaxExtLDs;
	/* Below is additional check to address future FW enhancement */
	if (instance->ctrl_info_buf->max_lds > 64)
		instance->supportmax256vd = 1;

	instance->drv_supported_vd_count = MEGASAS_MAX_LD_CHANNELS
					* MEGASAS_MAX_DEV_PER_CHANNEL;
	instance->drv_supported_pd_count = MEGASAS_MAX_PD_CHANNELS
					* MEGASAS_MAX_DEV_PER_CHANNEL;
	if (instance->supportmax256vd) {
		instance->fw_supported_vd_count = MAX_LOGICAL_DRIVES_EXT;
		instance->fw_supported_pd_count = MAX_PHYSICAL_DEVICES;
	} else {
		instance->fw_supported_vd_count = MAX_LOGICAL_DRIVES;
		instance->fw_supported_pd_count = MAX_PHYSICAL_DEVICES;
	}

	dev_info(&instance->pdev->dev,
		"FW provided supportMaxExtLDs: %d\tmax_lds: %d\n",
		instance->ctrl_info_buf->adapterOperations3.supportMaxExtLDs ? 1 : 0,
		instance->ctrl_info_buf->max_lds);

	if (instance->max_raid_mapsize) {
		ventura_map_sz = instance->max_raid_mapsize *
						MR_MIN_MAP_SIZE; /* 64k */
		fusion->current_map_sz = ventura_map_sz;
		fusion->max_map_sz = ventura_map_sz;
	} else {
		fusion->old_map_sz =  sizeof(struct MR_FW_RAID_MAP) +
					(sizeof(struct MR_LD_SPAN_MAP) *
					(instance->fw_supported_vd_count - 1));
		fusion->new_map_sz =  sizeof(struct MR_FW_RAID_MAP_EXT);

		fusion->max_map_sz =
			max(fusion->old_map_sz, fusion->new_map_sz);

		if (instance->supportmax256vd)
			fusion->current_map_sz = fusion->new_map_sz;
		else
			fusion->current_map_sz = fusion->old_map_sz;
	}
	/* irrespective of FW raid maps, driver raid map is constant */
	fusion->drv_map_sz = sizeof(struct MR_DRV_RAID_MAP_ALL);
}

/*
 * dcmd.opcode                - MR_DCMD_CTRL_SNAPDUMP_GET_PROPERTIES
 * dcmd.hdr.length            - number of bytes to read
 * dcmd.sge                   - Ptr to MR_SNAPDUMP_PROPERTIES
 * Desc:			 Fill in snapdump properties
 * Status:			 MFI_STAT_OK- Command successful
 */
void megasas_get_snapdump_properties(struct megasas_instance *instance)
{
	int ret = 0;
	struct megasas_cmd *cmd;
	struct megasas_dcmd_frame *dcmd;
	struct MR_SNAPDUMP_PROPERTIES *ci;
	dma_addr_t ci_h = 0;

	ci = instance->snapdump_prop;
	ci_h = instance->snapdump_prop_h;

	if (!ci)
		return;

	cmd = megasas_get_cmd(instance);

	if (!cmd) {
		dev_dbg(&instance->pdev->dev, "Failed to get a free cmd\n");
		return;
	}

	dcmd = &cmd->frame->dcmd;

	memset(ci, 0, sizeof(*ci));
	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);

	dcmd->cmd = MFI_CMD_DCMD;
	dcmd->cmd_status = MFI_STAT_INVALID_STATUS;
	dcmd->sge_count = 1;
	dcmd->flags = MFI_FRAME_DIR_READ;
	dcmd->timeout = 0;
	dcmd->pad_0 = 0;
	dcmd->data_xfer_len = cpu_to_le32(sizeof(struct MR_SNAPDUMP_PROPERTIES));
	dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_SNAPDUMP_GET_PROPERTIES);

	megasas_set_dma_settings(instance, dcmd, ci_h,
				 sizeof(struct MR_SNAPDUMP_PROPERTIES));

	if (!instance->mask_interrupts) {
		ret = megasas_issue_blocked_cmd(instance, cmd,
						MFI_IO_TIMEOUT_SECS);
	} else {
		ret = megasas_issue_polled(instance, cmd);
		cmd->flags |= DRV_DCMD_SKIP_REFIRE;
	}

	switch (ret) {
	case DCMD_SUCCESS:
		instance->snapdump_wait_time =
			min_t(u8, ci->trigger_min_num_sec_before_ocr,
				MEGASAS_MAX_SNAP_DUMP_WAIT_TIME);
		break;

	case DCMD_TIMEOUT:
		switch (dcmd_timeout_ocr_possible(instance)) {
		case INITIATE_OCR:
			cmd->flags |= DRV_DCMD_SKIP_REFIRE;
			mutex_unlock(&instance->reset_mutex);
			megasas_reset_fusion(instance->host,
				MFI_IO_TIMEOUT_OCR);
			mutex_lock(&instance->reset_mutex);
			break;
		case KILL_ADAPTER:
			megaraid_sas_kill_hba(instance);
			break;
		case IGNORE_TIMEOUT:
			dev_info(&instance->pdev->dev, "Ignore DCMD timeout: %s %d\n",
				__func__, __LINE__);
			break;
		}
	}

	if (ret != DCMD_TIMEOUT)
		megasas_return_cmd(instance, cmd);
}

/**
 * megasas_get_controller_info -	Returns FW's controller structure
 * @instance:				Adapter soft state
 *
 * Issues an internal command (DCMD) to get the FW's controller structure.
 * This information is mainly used to find out the maximum IO transfer per
 * command supported by the FW.
 */
int
megasas_get_ctrl_info(struct megasas_instance *instance)
{
	int ret = 0;
	struct megasas_cmd *cmd;
	struct megasas_dcmd_frame *dcmd;
	struct megasas_ctrl_info *ci;
	dma_addr_t ci_h = 0;

	ci = instance->ctrl_info_buf;
	ci_h = instance->ctrl_info_buf_h;

	cmd = megasas_get_cmd(instance);

	if (!cmd) {
		dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to get a free cmd\n");
		return -ENOMEM;
	}

	dcmd = &cmd->frame->dcmd;

	memset(ci, 0, sizeof(*ci));
	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);

	dcmd->cmd = MFI_CMD_DCMD;
	dcmd->cmd_status = MFI_STAT_INVALID_STATUS;
	dcmd->sge_count = 1;
	dcmd->flags = MFI_FRAME_DIR_READ;
	dcmd->timeout = 0;
	dcmd->pad_0 = 0;
	dcmd->data_xfer_len = cpu_to_le32(sizeof(struct megasas_ctrl_info));
	dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_GET_INFO);
	dcmd->mbox.b[0] = 1;

	megasas_set_dma_settings(instance, dcmd, ci_h,
				 sizeof(struct megasas_ctrl_info));

	if ((instance->adapter_type != MFI_SERIES) &&
	    !instance->mask_interrupts) {
		ret = megasas_issue_blocked_cmd(instance, cmd, MFI_IO_TIMEOUT_SECS);
	} else {
		ret = megasas_issue_polled(instance, cmd);
		cmd->flags |= DRV_DCMD_SKIP_REFIRE;
	}

	switch (ret) {
	case DCMD_SUCCESS:
		/* Save required controller information in
		 * CPU endianness format.
		 */
		le32_to_cpus((u32 *)&ci->properties.OnOffProperties);
		le16_to_cpus((u16 *)&ci->properties.on_off_properties2);
		le32_to_cpus((u32 *)&ci->adapterOperations2);
		le32_to_cpus((u32 *)&ci->adapterOperations3);
		le16_to_cpus((u16 *)&ci->adapter_operations4);
		le32_to_cpus((u32 *)&ci->adapter_operations5);

		/* Update the latest Ext VD info.
		 * From Init path, store current firmware details.
		 * From OCR path, detect any firmware properties changes.
		 * in case of Firmware upgrade without system reboot.
		 */
		megasas_update_ext_vd_details(instance);
		instance->support_seqnum_jbod_fp =
			ci->adapterOperations3.useSeqNumJbodFP;
		instance->support_morethan256jbod =
			ci->adapter_operations4.support_pd_map_target_id;
		instance->support_nvme_passthru =
			ci->adapter_operations4.support_nvme_passthru;
		instance->support_pci_lane_margining =
			ci->adapter_operations5.support_pci_lane_margining;
		instance->task_abort_tmo = ci->TaskAbortTO;
		instance->max_reset_tmo = ci->MaxResetTO;

		/*Check whether controller is iMR or MR */
		instance->is_imr = (ci->memory_size ? 0 : 1);

		instance->snapdump_wait_time =
			(ci->properties.on_off_properties2.enable_snap_dump ?
			 MEGASAS_DEFAULT_SNAP_DUMP_WAIT_TIME : 0);

		instance->enable_fw_dev_list =
			ci->properties.on_off_properties2.enable_fw_dev_list;

		dev_info(&instance->pdev->dev,
			"controller type\t: %s(%dMB)\n",
			instance->is_imr ? "iMR" : "MR",
			le16_to_cpu(ci->memory_size));

		instance->disableOnlineCtrlReset =
			ci->properties.OnOffProperties.disableOnlineCtrlReset;
		instance->secure_jbod_support =
			ci->adapterOperations3.supportSecurityonJBOD;
		dev_info(&instance->pdev->dev, "Online Controller Reset(OCR)\t: %s\n",
			instance->disableOnlineCtrlReset ? "Disabled" : "Enabled");
		dev_info(&instance->pdev->dev, "Secure JBOD support\t: %s\n",
			instance->secure_jbod_support ? "Yes" : "No");
		dev_info(&instance->pdev->dev, "NVMe passthru support\t: %s\n",
			 instance->support_nvme_passthru ? "Yes" : "No");
		dev_info(&instance->pdev->dev,
			 "FW provided TM TaskAbort/Reset timeout\t: %d secs/%d secs\n",
			 instance->task_abort_tmo, instance->max_reset_tmo);
		dev_info(&instance->pdev->dev, "JBOD sequence map support\t: %s\n",
			 instance->support_seqnum_jbod_fp ? "Yes" : "No");
		dev_info(&instance->pdev->dev, "PCI Lane Margining support\t: %s\n",
			 instance->support_pci_lane_margining ? "Yes" : "No");

		break;

	case DCMD_TIMEOUT:
		switch (dcmd_timeout_ocr_possible(instance)) {
		case INITIATE_OCR:
			cmd->flags |= DRV_DCMD_SKIP_REFIRE;
			mutex_unlock(&instance->reset_mutex);
			megasas_reset_fusion(instance->host,
				MFI_IO_TIMEOUT_OCR);
			mutex_lock(&instance->reset_mutex);
			break;
		case KILL_ADAPTER:
			megaraid_sas_kill_hba(instance);
			break;
		case IGNORE_TIMEOUT:
			dev_info(&instance->pdev->dev, "Ignore DCMD timeout: %s %d\n",
				__func__, __LINE__);
			break;
		}
		break;
	case DCMD_FAILED:
		megaraid_sas_kill_hba(instance);
		break;

	}

	if (ret != DCMD_TIMEOUT)
		megasas_return_cmd(instance, cmd);

	return ret;
}

/*
 * megasas_set_crash_dump_params -	Sends address of crash dump DMA buffer
 *					to firmware
 *
 * @instance:				Adapter soft state
 * @crash_buf_state		-	tell FW to turn ON/OFF crash dump feature
					MR_CRASH_BUF_TURN_OFF = 0
					MR_CRASH_BUF_TURN_ON = 1
 * @return 0 on success non-zero on failure.
 * Issues an internal command (DCMD) to set parameters for crash dump feature.
 * Driver will send address of crash dump DMA buffer and set mbox to tell FW
 * that driver supports crash dump feature. This DCMD will be sent only if
 * crash dump feature is supported by the FW.
 *
 */
int megasas_set_crash_dump_params(struct megasas_instance *instance,
	u8 crash_buf_state)
{
	int ret = 0;
	struct megasas_cmd *cmd;
	struct megasas_dcmd_frame *dcmd;

	cmd = megasas_get_cmd(instance);

	if (!cmd) {
		dev_err(&instance->pdev->dev, "Failed to get a free cmd\n");
		return -ENOMEM;
	}


	dcmd = &cmd->frame->dcmd;

	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
	dcmd->mbox.b[0] = crash_buf_state;
	dcmd->cmd = MFI_CMD_DCMD;
	dcmd->cmd_status = MFI_STAT_INVALID_STATUS;
	dcmd->sge_count = 1;
	dcmd->flags = MFI_FRAME_DIR_NONE;
	dcmd->timeout = 0;
	dcmd->pad_0 = 0;
	dcmd->data_xfer_len = cpu_to_le32(CRASH_DMA_BUF_SIZE);
	dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_SET_CRASH_DUMP_PARAMS);

	megasas_set_dma_settings(instance, dcmd, instance->crash_dump_h,
				 CRASH_DMA_BUF_SIZE);

	if ((instance->adapter_type != MFI_SERIES) &&
	    !instance->mask_interrupts)
		ret = megasas_issue_blocked_cmd(instance, cmd, MFI_IO_TIMEOUT_SECS);
	else
		ret = megasas_issue_polled(instance, cmd);

	if (ret == DCMD_TIMEOUT) {
		switch (dcmd_timeout_ocr_possible(instance)) {
		case INITIATE_OCR:
			cmd->flags |= DRV_DCMD_SKIP_REFIRE;
			megasas_reset_fusion(instance->host,
					MFI_IO_TIMEOUT_OCR);
			break;
		case KILL_ADAPTER:
			megaraid_sas_kill_hba(instance);
			break;
		case IGNORE_TIMEOUT:
			dev_info(&instance->pdev->dev, "Ignore DCMD timeout: %s %d\n",
				__func__, __LINE__);
			break;
		}
	} else
		megasas_return_cmd(instance, cmd);

	return ret;
}

/**
 * megasas_issue_init_mfi -	Initializes the FW
 * @instance:		Adapter soft state
 *
 * Issues the INIT MFI cmd
 */
static int
megasas_issue_init_mfi(struct megasas_instance *instance)
{
	__le32 context;
	struct megasas_cmd *cmd;
	struct megasas_init_frame *init_frame;
	struct megasas_init_queue_info *initq_info;
	dma_addr_t init_frame_h;
	dma_addr_t initq_info_h;

	/*
	 * Prepare a init frame. Note the init frame points to queue info
	 * structure. Each frame has SGL allocated after first 64 bytes. For
	 * this frame - since we don't need any SGL - we use SGL's space as
	 * queue info structure
	 *
	 * We will not get a NULL command below. We just created the pool.
	 */
	cmd = megasas_get_cmd(instance);

	init_frame = (struct megasas_init_frame *)cmd->frame;
	initq_info = (struct megasas_init_queue_info *)
		((unsigned long)init_frame + 64);

	init_frame_h = cmd->frame_phys_addr;
	initq_info_h = init_frame_h + 64;

	context = init_frame->context;
	memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
	memset(initq_info, 0, sizeof(struct megasas_init_queue_info));
	init_frame->context = context;

	initq_info->reply_queue_entries = cpu_to_le32(instance->max_fw_cmds + 1);
	initq_info->reply_queue_start_phys_addr_lo = cpu_to_le32(instance->reply_queue_h);

	initq_info->producer_index_phys_addr_lo = cpu_to_le32(instance->producer_h);
	initq_info->consumer_index_phys_addr_lo = cpu_to_le32(instance->consumer_h);

	init_frame->cmd = MFI_CMD_INIT;
	init_frame->cmd_status = MFI_STAT_INVALID_STATUS;
	init_frame->queue_info_new_phys_addr_lo =
		cpu_to_le32(lower_32_bits(initq_info_h));
	init_frame->queue_info_new_phys_addr_hi =
		cpu_to_le32(upper_32_bits(initq_info_h));

	init_frame->data_xfer_len = cpu_to_le32(sizeof(struct megasas_init_queue_info));

	/*
	 * disable the intr before firing the init frame to FW
	 */
	instance->instancet->disable_intr(instance);

	/*
	 * Issue the init frame in polled mode
	 */

	if (megasas_issue_polled(instance, cmd)) {
		dev_err(&instance->pdev->dev, "Failed to init firmware\n");
		megasas_return_cmd(instance, cmd);
		goto fail_fw_init;
	}

	megasas_return_cmd(instance, cmd);

	return 0;

fail_fw_init:
	return -EINVAL;
}

static u32
megasas_init_adapter_mfi(struct megasas_instance *instance)
{
	u32 context_sz;
	u32 reply_q_sz;

	/*
	 * Get various operational parameters from status register
	 */
	instance->max_fw_cmds = instance->instancet->read_fw_status_reg(instance) & 0x00FFFF;
	/*
	 * Reduce the max supported cmds by 1. This is to ensure that the
	 * reply_q_sz (1 more than the max cmd that driver may send)
	 * does not exceed max cmds that the FW can support
	 */
	instance->max_fw_cmds = instance->max_fw_cmds-1;
	instance->max_mfi_cmds = instance->max_fw_cmds;
	instance->max_num_sge = (instance->instancet->read_fw_status_reg(instance) & 0xFF0000) >>
					0x10;
	/*
	 * For MFI skinny adapters, MEGASAS_SKINNY_INT_CMDS commands
	 * are reserved for IOCTL + driver's internal DCMDs.
	 */
	if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
		(instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
		instance->max_scsi_cmds = (instance->max_fw_cmds -
			MEGASAS_SKINNY_INT_CMDS);
		sema_init(&instance->ioctl_sem, MEGASAS_SKINNY_INT_CMDS);
	} else {
		instance->max_scsi_cmds = (instance->max_fw_cmds -
			MEGASAS_INT_CMDS);
		sema_init(&instance->ioctl_sem, (MEGASAS_MFI_IOCTL_CMDS));
	}

	instance->cur_can_queue = instance->max_scsi_cmds;
	/*
	 * Create a pool of commands
	 */
	if (megasas_alloc_cmds(instance))
		goto fail_alloc_cmds;

	/*
	 * Allocate memory for reply queue. Length of reply queue should
	 * be _one_ more than the maximum commands handled by the firmware.
	 *
	 * Note: When FW completes commands, it places corresponding contex
	 * values in this circular reply queue. This circular queue is a fairly
	 * typical producer-consumer queue. FW is the producer (of completed
	 * commands) and the driver is the consumer.
	 */
	context_sz = sizeof(u32);
	reply_q_sz = context_sz * (instance->max_fw_cmds + 1);

	instance->reply_queue = dma_alloc_coherent(&instance->pdev->dev,
			reply_q_sz, &instance->reply_queue_h, GFP_KERNEL);

	if (!instance->reply_queue) {
		dev_printk(KERN_DEBUG, &instance->pdev->dev, "Out of DMA mem for reply queue\n");
		goto fail_reply_queue;
	}

	if (megasas_issue_init_mfi(instance))
		goto fail_fw_init;

	if (megasas_get_ctrl_info(instance)) {
		dev_err(&instance->pdev->dev, "(%d): Could get controller info "
			"Fail from %s %d\n", instance->unique_id,
			__func__, __LINE__);
		goto fail_fw_init;
	}

	instance->fw_support_ieee = 0;
	instance->fw_support_ieee =
		(instance->instancet->read_fw_status_reg(instance) &
		0x04000000);

	dev_notice(&instance->pdev->dev, "megasas_init_mfi: fw_support_ieee=%d",
			instance->fw_support_ieee);

	if (instance->fw_support_ieee)
		instance->flag_ieee = 1;

	return 0;

fail_fw_init:

	dma_free_coherent(&instance->pdev->dev, reply_q_sz,
			    instance->reply_queue, instance->reply_queue_h);
fail_reply_queue:
	megasas_free_cmds(instance);

fail_alloc_cmds:
	return 1;
}

static
void megasas_setup_irq_poll(struct megasas_instance *instance)
{
	struct megasas_irq_context *irq_ctx;
	u32 count, i;

	count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;

	/* Initialize IRQ poll */
	for (i = 0; i < count; i++) {
		irq_ctx = &instance->irq_context[i];
		irq_ctx->os_irq = pci_irq_vector(instance->pdev, i);
		irq_ctx->irq_poll_scheduled = false;
		irq_poll_init(&irq_ctx->irqpoll,
			      instance->threshold_reply_count,
			      megasas_irqpoll);
	}
}

/*
 * megasas_setup_irqs_ioapic -		register legacy interrupts.
 * @instance:				Adapter soft state
 *
 * Do not enable interrupt, only setup ISRs.
 *
 * Return 0 on success.
 */
static int
megasas_setup_irqs_ioapic(struct megasas_instance *instance)
{
	struct pci_dev *pdev;

	pdev = instance->pdev;
	instance->irq_context[0].instance = instance;
	instance->irq_context[0].MSIxIndex = 0;
	if (request_irq(pci_irq_vector(pdev, 0),
			instance->instancet->service_isr, IRQF_SHARED,
			"megasas", &instance->irq_context[0])) {
		dev_err(&instance->pdev->dev,
				"Failed to register IRQ from %s %d\n",
				__func__, __LINE__);
		return -1;
	}
	instance->perf_mode = MR_LATENCY_PERF_MODE;
	instance->low_latency_index_start = 0;
	return 0;
}

/**
 * megasas_setup_irqs_msix -		register MSI-x interrupts.
 * @instance:				Adapter soft state
 * @is_probe:				Driver probe check
 *
 * Do not enable interrupt, only setup ISRs.
 *
 * Return 0 on success.
 */
static int
megasas_setup_irqs_msix(struct megasas_instance *instance, u8 is_probe)
{
	int i, j;
	struct pci_dev *pdev;

	pdev = instance->pdev;

	/* Try MSI-x */
	for (i = 0; i < instance->msix_vectors; i++) {
		instance->irq_context[i].instance = instance;
		instance->irq_context[i].MSIxIndex = i;
		if (request_irq(pci_irq_vector(pdev, i),
			instance->instancet->service_isr, 0, "megasas",
			&instance->irq_context[i])) {
			dev_err(&instance->pdev->dev,
				"Failed to register IRQ for vector %d.\n", i);
			for (j = 0; j < i; j++)
				free_irq(pci_irq_vector(pdev, j),
					 &instance->irq_context[j]);
			/* Retry irq register for IO_APIC*/
			instance->msix_vectors = 0;
			instance->msix_load_balance = false;
			if (is_probe) {
				pci_free_irq_vectors(instance->pdev);
				return megasas_setup_irqs_ioapic(instance);
			} else {
				return -1;
			}
		}
	}

	return 0;
}

/*
 * megasas_destroy_irqs-		unregister interrupts.
 * @instance:				Adapter soft state
 * return:				void
 */
static void
megasas_destroy_irqs(struct megasas_instance *instance) {

	int i;
	int count;
	struct megasas_irq_context *irq_ctx;

	count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
	if (instance->adapter_type != MFI_SERIES) {
		for (i = 0; i < count; i++) {
			irq_ctx = &instance->irq_context[i];
			irq_poll_disable(&irq_ctx->irqpoll);
		}
	}

	if (instance->msix_vectors)
		for (i = 0; i < instance->msix_vectors; i++) {
			free_irq(pci_irq_vector(instance->pdev, i),
				 &instance->irq_context[i]);
		}
	else
		free_irq(pci_irq_vector(instance->pdev, 0),
			 &instance->irq_context[0]);
}

/**
 * megasas_setup_jbod_map -	setup jbod map for FP seq_number.
 * @instance:				Adapter soft state
 * @is_probe:				Driver probe check
 *
 * Return 0 on success.
 */
void
megasas_setup_jbod_map(struct megasas_instance *instance)
{
	int i;
	struct fusion_context *fusion = instance->ctrl_context;
	u32 pd_seq_map_sz;

	pd_seq_map_sz = sizeof(struct MR_PD_CFG_SEQ_NUM_SYNC) +
		(sizeof(struct MR_PD_CFG_SEQ) * (MAX_PHYSICAL_DEVICES - 1));

	instance->use_seqnum_jbod_fp =
		instance->support_seqnum_jbod_fp;
	if (reset_devices || !fusion ||
		!instance->support_seqnum_jbod_fp) {
		dev_info(&instance->pdev->dev,
			"JBOD sequence map is disabled %s %d\n",
			__func__, __LINE__);
		instance->use_seqnum_jbod_fp = false;
		return;
	}

	if (fusion->pd_seq_sync[0])
		goto skip_alloc;

	for (i = 0; i < JBOD_MAPS_COUNT; i++) {
		fusion->pd_seq_sync[i] = dma_alloc_coherent
			(&instance->pdev->dev, pd_seq_map_sz,
			&fusion->pd_seq_phys[i], GFP_KERNEL);
		if (!fusion->pd_seq_sync[i]) {
			dev_err(&instance->pdev->dev,
				"Failed to allocate memory from %s %d\n",
				__func__, __LINE__);
			if (i == 1) {
				dma_free_coherent(&instance->pdev->dev,
					pd_seq_map_sz, fusion->pd_seq_sync[0],
					fusion->pd_seq_phys[0]);
				fusion->pd_seq_sync[0] = NULL;
			}
			instance->use_seqnum_jbod_fp = false;
			return;
		}
	}

skip_alloc:
	if (!megasas_sync_pd_seq_num(instance, false) &&
		!megasas_sync_pd_seq_num(instance, true))
		instance->use_seqnum_jbod_fp = true;
	else
		instance->use_seqnum_jbod_fp = false;
}

static void megasas_setup_reply_map(struct megasas_instance *instance)
{
	const struct cpumask *mask;
	unsigned int queue, cpu, low_latency_index_start;

	low_latency_index_start = instance->low_latency_index_start;

	for (queue = low_latency_index_start; queue < instance->msix_vectors; queue++) {
		mask = pci_irq_get_affinity(instance->pdev, queue);
		if (!mask)
			goto fallback;

		for_each_cpu(cpu, mask)
			instance->reply_map[cpu] = queue;
	}
	return;

fallback:
	queue = low_latency_index_start;
	for_each_possible_cpu(cpu) {
		instance->reply_map[cpu] = queue;
		if (queue == (instance->msix_vectors - 1))
			queue = low_latency_index_start;
		else
			queue++;
	}
}

/**
 * megasas_get_device_list -	Get the PD and LD device list from FW.
 * @instance:			Adapter soft state
 * @return:			Success or failure
 *
 * Issue DCMDs to Firmware to get the PD and LD list.
 * Based on the FW support, driver sends the HOST_DEVICE_LIST or combination
 * of PD_LIST/LD_LIST_QUERY DCMDs to get the device list.
 */
static
int megasas_get_device_list(struct megasas_instance *instance)
{
	memset(instance->pd_list, 0,
	       (MEGASAS_MAX_PD * sizeof(struct megasas_pd_list)));
	memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);

	if (instance->enable_fw_dev_list) {
		if (megasas_host_device_list_query(instance, true))
			return FAILED;
	} else {
		if (megasas_get_pd_list(instance) < 0) {
			dev_err(&instance->pdev->dev, "failed to get PD list\n");
			return FAILED;
		}

		if (megasas_ld_list_query(instance,
					  MR_LD_QUERY_TYPE_EXPOSED_TO_HOST)) {
			dev_err(&instance->pdev->dev, "failed to get LD list\n");
			return FAILED;
		}
	}

	return SUCCESS;
}

/**
 * megasas_set_high_iops_queue_affinity_hint -	Set affinity hint for high IOPS queues
 * @instance:					Adapter soft state
 * return:					void
 */
static inline void
megasas_set_high_iops_queue_affinity_hint(struct megasas_instance *instance)
{
	int i;
	int local_numa_node;

	if (instance->perf_mode == MR_BALANCED_PERF_MODE) {
		local_numa_node = dev_to_node(&instance->pdev->dev);

		for (i = 0; i < instance->low_latency_index_start; i++)
			irq_set_affinity_hint(pci_irq_vector(instance->pdev, i),
				cpumask_of_node(local_numa_node));
	}
}

static int
__megasas_alloc_irq_vectors(struct megasas_instance *instance)
{
	int i, irq_flags;
	struct irq_affinity desc = { .pre_vectors = instance->low_latency_index_start };
	struct irq_affinity *descp = &desc;

	irq_flags = PCI_IRQ_MSIX;

	if (instance->smp_affinity_enable)
		irq_flags |= PCI_IRQ_AFFINITY;
	else
		descp = NULL;

	i = pci_alloc_irq_vectors_affinity(instance->pdev,
		instance->low_latency_index_start,
		instance->msix_vectors, irq_flags, descp);

	return i;
}

/**
 * megasas_alloc_irq_vectors -	Allocate IRQ vectors/enable MSI-x vectors
 * @instance:			Adapter soft state
 * return:			void
 */
static void
megasas_alloc_irq_vectors(struct megasas_instance *instance)
{
	int i;
	unsigned int num_msix_req;

	i = __megasas_alloc_irq_vectors(instance);

	if ((instance->perf_mode == MR_BALANCED_PERF_MODE) &&
	    (i != instance->msix_vectors)) {
		if (instance->msix_vectors)
			pci_free_irq_vectors(instance->pdev);
		/* Disable Balanced IOPS mode and try realloc vectors */
		instance->perf_mode = MR_LATENCY_PERF_MODE;
		instance->low_latency_index_start = 1;
		num_msix_req = num_online_cpus() + instance->low_latency_index_start;

		instance->msix_vectors = min(num_msix_req,
				instance->msix_vectors);

		i = __megasas_alloc_irq_vectors(instance);

	}

	dev_info(&instance->pdev->dev,
		"requested/available msix %d/%d\n", instance->msix_vectors, i);

	if (i > 0)
		instance->msix_vectors = i;
	else
		instance->msix_vectors = 0;

	if (instance->smp_affinity_enable)
		megasas_set_high_iops_queue_affinity_hint(instance);
}

/**
 * megasas_init_fw -	Initializes the FW
 * @instance:		Adapter soft state
 *
 * This is the main function for initializing firmware
 */

static int megasas_init_fw(struct megasas_instance *instance)
{
	u32 max_sectors_1;
	u32 max_sectors_2, tmp_sectors, msix_enable;
	u32 scratch_pad_1, scratch_pad_2, scratch_pad_3, status_reg;
	resource_size_t base_addr;
	void *base_addr_phys;
	struct megasas_ctrl_info *ctrl_info = NULL;
	unsigned long bar_list;
	int i, j, loop;
	struct IOV_111 *iovPtr;
	struct fusion_context *fusion;
	bool intr_coalescing;
	unsigned int num_msix_req;
	u16 lnksta, speed;

	fusion = instance->ctrl_context;

	/* Find first memory bar */
	bar_list = pci_select_bars(instance->pdev, IORESOURCE_MEM);
	instance->bar = find_first_bit(&bar_list, BITS_PER_LONG);
	if (pci_request_selected_regions(instance->pdev, 1<<instance->bar,
					 "megasas: LSI")) {
		dev_printk(KERN_DEBUG, &instance->pdev->dev, "IO memory region busy!\n");
		return -EBUSY;
	}

	base_addr = pci_resource_start(instance->pdev, instance->bar);
	instance->reg_set = ioremap_nocache(base_addr, 8192);

	if (!instance->reg_set) {
		dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to map IO mem\n");
		goto fail_ioremap;
	}

	base_addr_phys = &base_addr;
	dev_printk(KERN_DEBUG, &instance->pdev->dev,
		   "BAR:0x%lx  BAR's base_addr(phys):%pa  mapped virt_addr:0x%p\n",
		   instance->bar, base_addr_phys, instance->reg_set);

	if (instance->adapter_type != MFI_SERIES)
		instance->instancet = &megasas_instance_template_fusion;
	else {
		switch (instance->pdev->device) {
		case PCI_DEVICE_ID_LSI_SAS1078R:
		case PCI_DEVICE_ID_LSI_SAS1078DE:
			instance->instancet = &megasas_instance_template_ppc;
			break;
		case PCI_DEVICE_ID_LSI_SAS1078GEN2:
		case PCI_DEVICE_ID_LSI_SAS0079GEN2:
			instance->instancet = &megasas_instance_template_gen2;
			break;
		case PCI_DEVICE_ID_LSI_SAS0073SKINNY:
		case PCI_DEVICE_ID_LSI_SAS0071SKINNY:
			instance->instancet = &megasas_instance_template_skinny;
			break;
		case PCI_DEVICE_ID_LSI_SAS1064R:
		case PCI_DEVICE_ID_DELL_PERC5:
		default:
			instance->instancet = &megasas_instance_template_xscale;
			instance->pd_list_not_supported = 1;
			break;
		}
	}

	if (megasas_transition_to_ready(instance, 0)) {
		dev_info(&instance->pdev->dev,
			 "Failed to transition controller to ready from %s!\n",
			 __func__);
		if (instance->adapter_type != MFI_SERIES) {
			status_reg = instance->instancet->read_fw_status_reg(
					instance);
			if (status_reg & MFI_RESET_ADAPTER) {
				if (megasas_adp_reset_wait_for_ready
					(instance, true, 0) == FAILED)
					goto fail_ready_state;
			} else {
				goto fail_ready_state;
			}
		} else {
			atomic_set(&instance->fw_reset_no_pci_access, 1);
			instance->instancet->adp_reset
				(instance, instance->reg_set);
			atomic_set(&instance->fw_reset_no_pci_access, 0);

			/*waiting for about 30 second before retry*/
			ssleep(30);

			if (megasas_transition_to_ready(instance, 0))
				goto fail_ready_state;
		}

		dev_info(&instance->pdev->dev,
			 "FW restarted successfully from %s!\n",
			 __func__);
	}

	megasas_init_ctrl_params(instance);

	if (megasas_set_dma_mask(instance))
		goto fail_ready_state;

	if (megasas_alloc_ctrl_mem(instance))
		goto fail_alloc_dma_buf;

	if (megasas_alloc_ctrl_dma_buffers(instance))
		goto fail_alloc_dma_buf;

	fusion = instance->ctrl_context;

	if (instance->adapter_type >= VENTURA_SERIES) {
		scratch_pad_2 =
			megasas_readl(instance,
				      &instance->reg_set->outbound_scratch_pad_2);
		instance->max_raid_mapsize = ((scratch_pad_2 >>
			MR_MAX_RAID_MAP_SIZE_OFFSET_SHIFT) &
			MR_MAX_RAID_MAP_SIZE_MASK);
	}

	instance->enable_sdev_max_qd = enable_sdev_max_qd;

	switch (instance->adapter_type) {
	case VENTURA_SERIES:
		fusion->pcie_bw_limitation = true;
		break;
	case AERO_SERIES:
		fusion->r56_div_offload = true;
		break;
	default:
		break;
	}

	/* Check if MSI-X is supported while in ready state */
	msix_enable = (instance->instancet->read_fw_status_reg(instance) &
		       0x4000000) >> 0x1a;
	if (msix_enable && !msix_disable) {

		scratch_pad_1 = megasas_readl
			(instance, &instance->reg_set->outbound_scratch_pad_1);
		/* Check max MSI-X vectors */
		if (fusion) {
			if (instance->adapter_type == THUNDERBOLT_SERIES) {
				/* Thunderbolt Series*/
				instance->msix_vectors = (scratch_pad_1
					& MR_MAX_REPLY_QUEUES_OFFSET) + 1;
			} else {
				instance->msix_vectors = ((scratch_pad_1
					& MR_MAX_REPLY_QUEUES_EXT_OFFSET)
					>> MR_MAX_REPLY_QUEUES_EXT_OFFSET_SHIFT) + 1;

				/*
				 * For Invader series, > 8 MSI-x vectors
				 * supported by FW/HW implies combined
				 * reply queue mode is enabled.
				 * For Ventura series, > 16 MSI-x vectors
				 * supported by FW/HW implies combined
				 * reply queue mode is enabled.
				 */
				switch (instance->adapter_type) {
				case INVADER_SERIES:
					if (instance->msix_vectors > 8)
						instance->msix_combined = true;
					break;
				case AERO_SERIES:
				case VENTURA_SERIES:
					if (instance->msix_vectors > 16)
						instance->msix_combined = true;
					break;
				}

				if (rdpq_enable)
					instance->is_rdpq = (scratch_pad_1 & MR_RDPQ_MODE_OFFSET) ?
								1 : 0;

				if (instance->adapter_type >= INVADER_SERIES &&
				    !instance->msix_combined) {
					instance->msix_load_balance = true;
					instance->smp_affinity_enable = false;
				}

				/* Save 1-15 reply post index address to local memory
				 * Index 0 is already saved from reg offset
				 * MPI2_REPLY_POST_HOST_INDEX_OFFSET
				 */
				for (loop = 1; loop < MR_MAX_MSIX_REG_ARRAY; loop++) {
					instance->reply_post_host_index_addr[loop] =
						(u32 __iomem *)
						((u8 __iomem *)instance->reg_set +
						MPI2_SUP_REPLY_POST_HOST_INDEX_OFFSET
						+ (loop * 0x10));
				}
			}

			dev_info(&instance->pdev->dev,
				 "firmware supports msix\t: (%d)",
				 instance->msix_vectors);
			if (msix_vectors)
				instance->msix_vectors = min(msix_vectors,
					instance->msix_vectors);
		} else /* MFI adapters */
			instance->msix_vectors = 1;


		/*
		 * For Aero (if some conditions are met), driver will configure a
		 * few additional reply queues with interrupt coalescing enabled.
		 * These queues with interrupt coalescing enabled are called
		 * High IOPS queues and rest of reply queues (based on number of
		 * logical CPUs) are termed as Low latency queues.
		 *
		 * Total Number of reply queues = High IOPS queues + low latency queues
		 *
		 * For rest of fusion adapters, 1 additional reply queue will be
		 * reserved for management commands, rest of reply queues
		 * (based on number of logical CPUs) will be used for IOs and
		 * referenced as IO queues.
		 * Total Number of reply queues = 1 + IO queues
		 *
		 * MFI adapters supports single MSI-x so single reply queue
		 * will be used for IO and management commands.
		 */

		intr_coalescing = (scratch_pad_1 & MR_INTR_COALESCING_SUPPORT_OFFSET) ?
								true : false;
		if (intr_coalescing &&
			(num_online_cpus() >= MR_HIGH_IOPS_QUEUE_COUNT) &&
			(instance->msix_vectors == MEGASAS_MAX_MSIX_QUEUES))
			instance->perf_mode = MR_BALANCED_PERF_MODE;
		else
			instance->perf_mode = MR_LATENCY_PERF_MODE;


		if (instance->adapter_type == AERO_SERIES) {
			pcie_capability_read_word(instance->pdev, PCI_EXP_LNKSTA, &lnksta);
			speed = lnksta & PCI_EXP_LNKSTA_CLS;

			/*
			 * For Aero, if PCIe link speed is <16 GT/s, then driver should operate
			 * in latency perf mode and enable R1 PCI bandwidth algorithm
			 */
			if (speed < 0x4) {
				instance->perf_mode = MR_LATENCY_PERF_MODE;
				fusion->pcie_bw_limitation = true;
			}

			/*
			 * Performance mode settings provided through module parameter-perf_mode will
			 * take affect only for:
			 * 1. Aero family of adapters.
			 * 2. When user sets module parameter- perf_mode in range of 0-2.
			 */
			if ((perf_mode >= MR_BALANCED_PERF_MODE) &&
				(perf_mode <= MR_LATENCY_PERF_MODE))
				instance->perf_mode = perf_mode;
			/*
			 * If intr coalescing is not supported by controller FW, then IOPS
			 * and Balanced modes are not feasible.
			 */
			if (!intr_coalescing)
				instance->perf_mode = MR_LATENCY_PERF_MODE;

		}

		if (instance->perf_mode == MR_BALANCED_PERF_MODE)
			instance->low_latency_index_start =
				MR_HIGH_IOPS_QUEUE_COUNT;
		else
			instance->low_latency_index_start = 1;

		num_msix_req = num_online_cpus() + instance->low_latency_index_start;

		instance->msix_vectors = min(num_msix_req,
				instance->msix_vectors);

		megasas_alloc_irq_vectors(instance);
		if (!instance->msix_vectors)
			instance->msix_load_balance = false;
	}
	/*
	 * MSI-X host index 0 is common for all adapter.
	 * It is used for all MPT based Adapters.
	 */
	if (instance->msix_combined) {
		instance->reply_post_host_index_addr[0] =
				(u32 *)((u8 *)instance->reg_set +
				MPI2_SUP_REPLY_POST_HOST_INDEX_OFFSET);
	} else {
		instance->reply_post_host_index_addr[0] =
			(u32 *)((u8 *)instance->reg_set +
			MPI2_REPLY_POST_HOST_INDEX_OFFSET);
	}

	if (!instance->msix_vectors) {
		i = pci_alloc_irq_vectors(instance->pdev, 1, 1, PCI_IRQ_LEGACY);
		if (i < 0)
			goto fail_init_adapter;
	}

	megasas_setup_reply_map(instance);

	dev_info(&instance->pdev->dev,
		"current msix/online cpus\t: (%d/%d)\n",
		instance->msix_vectors, (unsigned int)num_online_cpus());
	dev_info(&instance->pdev->dev,
		"RDPQ mode\t: (%s)\n", instance->is_rdpq ? "enabled" : "disabled");

	tasklet_init(&instance->isr_tasklet, instance->instancet->tasklet,
		(unsigned long)instance);

	/*
	 * Below are default value for legacy Firmware.
	 * non-fusion based controllers
	 */
	instance->fw_supported_vd_count = MAX_LOGICAL_DRIVES;
	instance->fw_supported_pd_count = MAX_PHYSICAL_DEVICES;
	/* Get operational params, sge flags, send init cmd to controller */
	if (instance->instancet->init_adapter(instance))
		goto fail_init_adapter;

	if (instance->adapter_type >= VENTURA_SERIES) {
		scratch_pad_3 =
			megasas_readl(instance,
				      &instance->reg_set->outbound_scratch_pad_3);
		if ((scratch_pad_3 & MR_NVME_PAGE_SIZE_MASK) >=
			MR_DEFAULT_NVME_PAGE_SHIFT)
			instance->nvme_page_size =
				(1 << (scratch_pad_3 & MR_NVME_PAGE_SIZE_MASK));

		dev_info(&instance->pdev->dev,
			 "NVME page size\t: (%d)\n", instance->nvme_page_size);
	}

	if (instance->msix_vectors ?
		megasas_setup_irqs_msix(instance, 1) :
		megasas_setup_irqs_ioapic(instance))
		goto fail_init_adapter;

	if (instance->adapter_type != MFI_SERIES)
		megasas_setup_irq_poll(instance);

	instance->instancet->enable_intr(instance);

	dev_info(&instance->pdev->dev, "INIT adapter done\n");

	megasas_setup_jbod_map(instance);

	if (megasas_get_device_list(instance) != SUCCESS) {
		dev_err(&instance->pdev->dev,
			"%s: megasas_get_device_list failed\n",
			__func__);
		goto fail_get_ld_pd_list;
	}

	/* stream detection initialization */
	if (instance->adapter_type >= VENTURA_SERIES) {
		fusion->stream_detect_by_ld =
			kcalloc(MAX_LOGICAL_DRIVES_EXT,
				sizeof(struct LD_STREAM_DETECT *),
				GFP_KERNEL);
		if (!fusion->stream_detect_by_ld) {
			dev_err(&instance->pdev->dev,
				"unable to allocate stream detection for pool of LDs\n");
			goto fail_get_ld_pd_list;
		}
		for (i = 0; i < MAX_LOGICAL_DRIVES_EXT; ++i) {
			fusion->stream_detect_by_ld[i] =
				kzalloc(sizeof(struct LD_STREAM_DETECT),
				GFP_KERNEL);
			if (!fusion->stream_detect_by_ld[i]) {
				dev_err(&instance->pdev->dev,
					"unable to allocate stream detect by LD\n ");
				for (j = 0; j < i; ++j)
					kfree(fusion->stream_detect_by_ld[j]);
				kfree(fusion->stream_detect_by_ld);
				fusion->stream_detect_by_ld = NULL;
				goto fail_get_ld_pd_list;
			}
			fusion->stream_detect_by_ld[i]->mru_bit_map
				= MR_STREAM_BITMAP;
		}
	}

	/*
	 * Compute the max allowed sectors per IO: The controller info has two
	 * limits on max sectors. Driver should use the minimum of these two.
	 *
	 * 1 << stripe_sz_ops.min = max sectors per strip
	 *
	 * Note that older firmwares ( < FW ver 30) didn't report information
	 * to calculate max_sectors_1. So the number ended up as zero always.
	 */
	tmp_sectors = 0;
	ctrl_info = instance->ctrl_info_buf;

	max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) *
		le16_to_cpu(ctrl_info->max_strips_per_io);
	max_sectors_2 = le32_to_cpu(ctrl_info->max_request_size);

	tmp_sectors = min_t(u32, max_sectors_1, max_sectors_2);

	instance->peerIsPresent = ctrl_info->cluster.peerIsPresent;
	instance->passive = ctrl_info->cluster.passive;
	memcpy(instance->clusterId, ctrl_info->clusterId, sizeof(instance->clusterId));
	instance->UnevenSpanSupport =
		ctrl_info->adapterOperations2.supportUnevenSpans;
	if (instance->UnevenSpanSupport) {
		struct fusion_context *fusion = instance->ctrl_context;
		if (MR_ValidateMapInfo(instance, instance->map_id))
			fusion->fast_path_io = 1;
		else
			fusion->fast_path_io = 0;

	}
	if (ctrl_info->host_interface.SRIOV) {
		instance->requestorId = ctrl_info->iov.requestorId;
		if (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) {
			if (!ctrl_info->adapterOperations2.activePassive)
			    instance->PlasmaFW111 = 1;

			dev_info(&instance->pdev->dev, "SR-IOV: firmware type: %s\n",
			    instance->PlasmaFW111 ? "1.11" : "new");

			if (instance->PlasmaFW111) {
			    iovPtr = (struct IOV_111 *)
				((unsigned char *)ctrl_info + IOV_111_OFFSET);
			    instance->requestorId = iovPtr->requestorId;
			}
		}
		dev_info(&instance->pdev->dev, "SRIOV: VF requestorId %d\n",
			instance->requestorId);
	}

	instance->crash_dump_fw_support =
		ctrl_info->adapterOperations3.supportCrashDump;
	instance->crash_dump_drv_support =
		(instance->crash_dump_fw_support &&
		instance->crash_dump_buf);
	if (instance->crash_dump_drv_support)
		megasas_set_crash_dump_params(instance,
			MR_CRASH_BUF_TURN_OFF);

	else {
		if (instance->crash_dump_buf)
			dma_free_coherent(&instance->pdev->dev,
				CRASH_DMA_BUF_SIZE,
				instance->crash_dump_buf,
				instance->crash_dump_h);
		instance->crash_dump_buf = NULL;
	}

	if (instance->snapdump_wait_time) {
		megasas_get_snapdump_properties(instance);
		dev_info(&instance->pdev->dev, "Snap dump wait time\t: %d\n",
			 instance->snapdump_wait_time);
	}

	dev_info(&instance->pdev->dev,
		"pci id\t\t: (0x%04x)/(0x%04x)/(0x%04x)/(0x%04x)\n",
		le16_to_cpu(ctrl_info->pci.vendor_id),
		le16_to_cpu(ctrl_info->pci.device_id),
		le16_to_cpu(ctrl_info->pci.sub_vendor_id),
		le16_to_cpu(ctrl_info->pci.sub_device_id));
	dev_info(&instance->pdev->dev, "unevenspan support	: %s\n",
		instance->UnevenSpanSupport ? "yes" : "no");
	dev_info(&instance->pdev->dev, "firmware crash dump	: %s\n",
		instance->crash_dump_drv_support ? "yes" : "no");
	dev_info(&instance->pdev->dev, "JBOD sequence map	: %s\n",
		instance->use_seqnum_jbod_fp ? "enabled" : "disabled");

	instance->max_sectors_per_req = instance->max_num_sge *
						SGE_BUFFER_SIZE / 512;
	if (tmp_sectors && (instance->max_sectors_per_req > tmp_sectors))
		instance->max_sectors_per_req = tmp_sectors;

	/* Check for valid throttlequeuedepth module parameter */
	if (throttlequeuedepth &&
			throttlequeuedepth <= instance->max_scsi_cmds)
		instance->throttlequeuedepth = throttlequeuedepth;
	else
		instance->throttlequeuedepth =
				MEGASAS_THROTTLE_QUEUE_DEPTH;

	if ((resetwaittime < 1) ||
	    (resetwaittime > MEGASAS_RESET_WAIT_TIME))
		resetwaittime = MEGASAS_RESET_WAIT_TIME;

	if ((scmd_timeout < 10) || (scmd_timeout > MEGASAS_DEFAULT_CMD_TIMEOUT))
		scmd_timeout = MEGASAS_DEFAULT_CMD_TIMEOUT;

	/* Launch SR-IOV heartbeat timer */
	if (instance->requestorId) {
		if (!megasas_sriov_start_heartbeat(instance, 1)) {
			megasas_start_timer(instance);
		} else {
			instance->skip_heartbeat_timer_del = 1;
			goto fail_get_ld_pd_list;
		}
	}

	/*
	 * Create and start watchdog thread which will monitor
	 * controller state every 1 sec and trigger OCR when
	 * it enters fault state
	 */
	if (instance->adapter_type != MFI_SERIES)
		if (megasas_fusion_start_watchdog(instance) != SUCCESS)
			goto fail_start_watchdog;

	return 0;

fail_start_watchdog:
	if (instance->requestorId && !instance->skip_heartbeat_timer_del)
		del_timer_sync(&instance->sriov_heartbeat_timer);
fail_get_ld_pd_list:
	instance->instancet->disable_intr(instance);
	megasas_destroy_irqs(instance);
fail_init_adapter:
	if (instance->msix_vectors)
		pci_free_irq_vectors(instance->pdev);
	instance->msix_vectors = 0;
fail_alloc_dma_buf:
	megasas_free_ctrl_dma_buffers(instance);
	megasas_free_ctrl_mem(instance);
fail_ready_state:
	iounmap(instance->reg_set);

fail_ioremap:
	pci_release_selected_regions(instance->pdev, 1<<instance->bar);

	dev_err(&instance->pdev->dev, "Failed from %s %d\n",
		__func__, __LINE__);
	return -EINVAL;
}

/**
 * megasas_release_mfi -	Reverses the FW initialization
 * @instance:			Adapter soft state
 */
static void megasas_release_mfi(struct megasas_instance *instance)
{
	u32 reply_q_sz = sizeof(u32) *(instance->max_mfi_cmds + 1);

	if (instance->reply_queue)
		dma_free_coherent(&instance->pdev->dev, reply_q_sz,
			    instance->reply_queue, instance->reply_queue_h);

	megasas_free_cmds(instance);

	iounmap(instance->reg_set);

	pci_release_selected_regions(instance->pdev, 1<<instance->bar);
}

/**
 * megasas_get_seq_num -	Gets latest event sequence numbers
 * @instance:			Adapter soft state
 * @eli:			FW event log sequence numbers information
 *
 * FW maintains a log of all events in a non-volatile area. Upper layers would
 * usually find out the latest sequence number of the events, the seq number at
 * the boot etc. They would "read" all the events below the latest seq number
 * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
 * number), they would subsribe to AEN (asynchronous event notification) and
 * wait for the events to happen.
 */
static int
megasas_get_seq_num(struct megasas_instance *instance,
		    struct megasas_evt_log_info *eli)
{
	struct megasas_cmd *cmd;
	struct megasas_dcmd_frame *dcmd;
	struct megasas_evt_log_info *el_info;
	dma_addr_t el_info_h = 0;
	int ret;

	cmd = megasas_get_cmd(instance);

	if (!cmd) {
		return -ENOMEM;
	}

	dcmd = &cmd->frame->dcmd;
	el_info = dma_alloc_coherent(&instance->pdev->dev,
				     sizeof(struct megasas_evt_log_info),
				     &el_info_h, GFP_KERNEL);
	if (!el_info) {
		megasas_return_cmd(instance, cmd);
		return -ENOMEM;
	}

	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);

	dcmd->cmd = MFI_CMD_DCMD;
	dcmd->cmd_status = 0x0;
	dcmd->sge_count = 1;
	dcmd->flags = MFI_FRAME_DIR_READ;
	dcmd->timeout = 0;
	dcmd->pad_0 = 0;
	dcmd->data_xfer_len = cpu_to_le32(sizeof(struct megasas_evt_log_info));
	dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_EVENT_GET_INFO);

	megasas_set_dma_settings(instance, dcmd, el_info_h,
				 sizeof(struct megasas_evt_log_info));

	ret = megasas_issue_blocked_cmd(instance, cmd, MFI_IO_TIMEOUT_SECS);
	if (ret != DCMD_SUCCESS) {
		dev_err(&instance->pdev->dev, "Failed from %s %d\n",
			__func__, __LINE__);
		goto dcmd_failed;
	}

	/*
	 * Copy the data back into callers buffer
	 */
	eli->newest_seq_num = el_info->newest_seq_num;
	eli->oldest_seq_num = el_info->oldest_seq_num;
	eli->clear_seq_num = el_info->clear_seq_num;
	eli->shutdown_seq_num = el_info->shutdown_seq_num;
	eli->boot_seq_num = el_info->boot_seq_num;

dcmd_failed:
	dma_free_coherent(&instance->pdev->dev,
			sizeof(struct megasas_evt_log_info),
			el_info, el_info_h);

	megasas_return_cmd(instance, cmd);

	return ret;
}

/**
 * megasas_register_aen -	Registers for asynchronous event notification
 * @instance:			Adapter soft state
 * @seq_num:			The starting sequence number
 * @class_locale:		Class of the event
 *
 * This function subscribes for AEN for events beyond the @seq_num. It requests
 * to be notified if and only if the event is of type @class_locale
 */
static int
megasas_register_aen(struct megasas_instance *instance, u32 seq_num,
		     u32 class_locale_word)
{
	int ret_val;
	struct megasas_cmd *cmd;
	struct megasas_dcmd_frame *dcmd;
	union megasas_evt_class_locale curr_aen;
	union megasas_evt_class_locale prev_aen;

	/*
	 * If there an AEN pending already (aen_cmd), check if the
	 * class_locale of that pending AEN is inclusive of the new
	 * AEN request we currently have. If it is, then we don't have
	 * to do anything. In other words, whichever events the current
	 * AEN request is subscribing to, have already been subscribed
	 * to.
	 *
	 * If the old_cmd is _not_ inclusive, then we have to abort
	 * that command, form a class_locale that is superset of both
	 * old and current and re-issue to the FW
	 */

	curr_aen.word = class_locale_word;

	if (instance->aen_cmd) {

		prev_aen.word =
			le32_to_cpu(instance->aen_cmd->frame->dcmd.mbox.w[1]);

		if ((curr_aen.members.class < MFI_EVT_CLASS_DEBUG) ||
		    (curr_aen.members.class > MFI_EVT_CLASS_DEAD)) {
			dev_info(&instance->pdev->dev,
				 "%s %d out of range class %d send by application\n",
				 __func__, __LINE__, curr_aen.members.class);
			return 0;
		}

		/*
		 * A class whose enum value is smaller is inclusive of all
		 * higher values. If a PROGRESS (= -1) was previously
		 * registered, then a new registration requests for higher
		 * classes need not be sent to FW. They are automatically
		 * included.
		 *
		 * Locale numbers don't have such hierarchy. They are bitmap
		 * values
		 */
		if ((prev_aen.members.class <= curr_aen.members.class) &&
		    !((prev_aen.members.locale & curr_aen.members.locale) ^
		      curr_aen.members.locale)) {
			/*
			 * Previously issued event registration includes
			 * current request. Nothing to do.
			 */
			return 0;
		} else {
			curr_aen.members.locale |= prev_aen.members.locale;

			if (prev_aen.members.class < curr_aen.members.class)
				curr_aen.members.class = prev_aen.members.class;

			instance->aen_cmd->abort_aen = 1;
			ret_val = megasas_issue_blocked_abort_cmd(instance,
								  instance->
								  aen_cmd, 30);

			if (ret_val) {
				dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to abort "
				       "previous AEN command\n");
				return ret_val;
			}
		}
	}

	cmd = megasas_get_cmd(instance);

	if (!cmd)
		return -ENOMEM;

	dcmd = &cmd->frame->dcmd;

	memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail));

	/*
	 * Prepare DCMD for aen registration
	 */
	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);

	dcmd->cmd = MFI_CMD_DCMD;
	dcmd->cmd_status = 0x0;
	dcmd->sge_count = 1;
	dcmd->flags = MFI_FRAME_DIR_READ;
	dcmd->timeout = 0;
	dcmd->pad_0 = 0;
	dcmd->data_xfer_len = cpu_to_le32(sizeof(struct megasas_evt_detail));
	dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_EVENT_WAIT);
	dcmd->mbox.w[0] = cpu_to_le32(seq_num);
	instance->last_seq_num = seq_num;
	dcmd->mbox.w[1] = cpu_to_le32(curr_aen.word);

	megasas_set_dma_settings(instance, dcmd, instance->evt_detail_h,
				 sizeof(struct megasas_evt_detail));

	if (instance->aen_cmd != NULL) {
		megasas_return_cmd(instance, cmd);
		return 0;
	}

	/*
	 * Store reference to the cmd used to register for AEN. When an
	 * application wants us to register for AEN, we have to abort this
	 * cmd and re-register with a new EVENT LOCALE supplied by that app
	 */
	instance->aen_cmd = cmd;

	/*
	 * Issue the aen registration frame
	 */
	instance->instancet->issue_dcmd(instance, cmd);

	return 0;
}

/* megasas_get_target_prop - Send DCMD with below details to firmware.
 *
 * This DCMD will fetch few properties of LD/system PD defined
 * in MR_TARGET_DEV_PROPERTIES. eg. Queue Depth, MDTS value.
 *
 * DCMD send by drivers whenever new target is added to the OS.
 *
 * dcmd.opcode         - MR_DCMD_DEV_GET_TARGET_PROP
 * dcmd.mbox.b[0]      - DCMD is to be fired for LD or system PD.
 *                       0 = system PD, 1 = LD.
 * dcmd.mbox.s[1]      - TargetID for LD/system PD.
 * dcmd.sge IN         - Pointer to return MR_TARGET_DEV_PROPERTIES.
 *
 * @instance:		Adapter soft state
 * @sdev:		OS provided scsi device
 *
 * Returns 0 on success non-zero on failure.
 */
int
megasas_get_target_prop(struct megasas_instance *instance,
			struct scsi_device *sdev)
{
	int ret;
	struct megasas_cmd *cmd;
	struct megasas_dcmd_frame *dcmd;
	u16 targetId = ((sdev->channel % 2) * MEGASAS_MAX_DEV_PER_CHANNEL) +
			sdev->id;

	cmd = megasas_get_cmd(instance);

	if (!cmd) {
		dev_err(&instance->pdev->dev,
			"Failed to get cmd %s\n", __func__);
		return -ENOMEM;
	}

	dcmd = &cmd->frame->dcmd;

	memset(instance->tgt_prop, 0, sizeof(*instance->tgt_prop));
	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
	dcmd->mbox.b[0] = MEGASAS_IS_LOGICAL(sdev);

	dcmd->mbox.s[1] = cpu_to_le16(targetId);
	dcmd->cmd = MFI_CMD_DCMD;
	dcmd->cmd_status = 0xFF;
	dcmd->sge_count = 1;
	dcmd->flags = MFI_FRAME_DIR_READ;
	dcmd->timeout = 0;
	dcmd->pad_0 = 0;
	dcmd->data_xfer_len =
		cpu_to_le32(sizeof(struct MR_TARGET_PROPERTIES));
	dcmd->opcode = cpu_to_le32(MR_DCMD_DRV_GET_TARGET_PROP);

	megasas_set_dma_settings(instance, dcmd, instance->tgt_prop_h,
				 sizeof(struct MR_TARGET_PROPERTIES));

	if ((instance->adapter_type != MFI_SERIES) &&
	    !instance->mask_interrupts)
		ret = megasas_issue_blocked_cmd(instance,
						cmd, MFI_IO_TIMEOUT_SECS);
	else
		ret = megasas_issue_polled(instance, cmd);

	switch (ret) {
	case DCMD_TIMEOUT:
		switch (dcmd_timeout_ocr_possible(instance)) {
		case INITIATE_OCR:
			cmd->flags |= DRV_DCMD_SKIP_REFIRE;
			mutex_unlock(&instance->reset_mutex);
			megasas_reset_fusion(instance->host,
					     MFI_IO_TIMEOUT_OCR);
			mutex_lock(&instance->reset_mutex);
			break;
		case KILL_ADAPTER:
			megaraid_sas_kill_hba(instance);
			break;
		case IGNORE_TIMEOUT:
			dev_info(&instance->pdev->dev,
				 "Ignore DCMD timeout: %s %d\n",
				 __func__, __LINE__);
			break;
		}
		break;

	default:
		megasas_return_cmd(instance, cmd);
	}
	if (ret != DCMD_SUCCESS)
		dev_err(&instance->pdev->dev,
			"return from %s %d return value %d\n",
			__func__, __LINE__, ret);

	return ret;
}

/**
 * megasas_start_aen -	Subscribes to AEN during driver load time
 * @instance:		Adapter soft state
 */
static int megasas_start_aen(struct megasas_instance *instance)
{
	struct megasas_evt_log_info eli;
	union megasas_evt_class_locale class_locale;

	/*
	 * Get the latest sequence number from FW
	 */
	memset(&eli, 0, sizeof(eli));

	if (megasas_get_seq_num(instance, &eli))
		return -1;

	/*
	 * Register AEN with FW for latest sequence number plus 1
	 */
	class_locale.members.reserved = 0;
	class_locale.members.locale = MR_EVT_LOCALE_ALL;
	class_locale.members.class = MR_EVT_CLASS_DEBUG;

	return megasas_register_aen(instance,
			le32_to_cpu(eli.newest_seq_num) + 1,
			class_locale.word);
}

/**
 * megasas_io_attach -	Attaches this driver to SCSI mid-layer
 * @instance:		Adapter soft state
 */
static int megasas_io_attach(struct megasas_instance *instance)
{
	struct Scsi_Host *host = instance->host;

	/*
	 * Export parameters required by SCSI mid-layer
	 */
	host->unique_id = instance->unique_id;
	host->can_queue = instance->max_scsi_cmds;
	host->this_id = instance->init_id;
	host->sg_tablesize = instance->max_num_sge;

	if (instance->fw_support_ieee)
		instance->max_sectors_per_req = MEGASAS_MAX_SECTORS_IEEE;

	/*
	 * Check if the module parameter value for max_sectors can be used
	 */
	if (max_sectors && max_sectors < instance->max_sectors_per_req)
		instance->max_sectors_per_req = max_sectors;
	else {
		if (max_sectors) {
			if (((instance->pdev->device ==
				PCI_DEVICE_ID_LSI_SAS1078GEN2) ||
				(instance->pdev->device ==
				PCI_DEVICE_ID_LSI_SAS0079GEN2)) &&
				(max_sectors <= MEGASAS_MAX_SECTORS)) {
				instance->max_sectors_per_req = max_sectors;
			} else {
			dev_info(&instance->pdev->dev, "max_sectors should be > 0"
				"and <= %d (or < 1MB for GEN2 controller)\n",
				instance->max_sectors_per_req);
			}
		}
	}

	host->max_sectors = instance->max_sectors_per_req;
	host->cmd_per_lun = MEGASAS_DEFAULT_CMD_PER_LUN;
	host->max_channel = MEGASAS_MAX_CHANNELS - 1;
	host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
	host->max_lun = MEGASAS_MAX_LUN;
	host->max_cmd_len = 16;

	/*
	 * Notify the mid-layer about the new controller
	 */
	if (scsi_add_host(host, &instance->pdev->dev)) {
		dev_err(&instance->pdev->dev,
			"Failed to add host from %s %d\n",
			__func__, __LINE__);
		return -ENODEV;
	}

	return 0;
}

/**
 * megasas_set_dma_mask -	Set DMA mask for supported controllers
 *
 * @instance:		Adapter soft state
 * Description:
 *
 * For Ventura, driver/FW will operate in 63bit DMA addresses.
 *
 * For invader-
 *	By default, driver/FW will operate in 32bit DMA addresses
 *	for consistent DMA mapping but if 32 bit consistent
 *	DMA mask fails, driver will try with 63 bit consistent
 *	mask provided FW is true 63bit DMA capable
 *
 * For older controllers(Thunderbolt and MFI based adapters)-
 *	driver/FW will operate in 32 bit consistent DMA addresses.
 */
static int
megasas_set_dma_mask(struct megasas_instance *instance)
{
	u64 consistent_mask;
	struct pci_dev *pdev;
	u32 scratch_pad_1;

	pdev = instance->pdev;
	consistent_mask = (instance->adapter_type >= VENTURA_SERIES) ?
				DMA_BIT_MASK(63) : DMA_BIT_MASK(32);

	if (IS_DMA64) {
		if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(63)) &&
		    dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)))
			goto fail_set_dma_mask;

		if ((*pdev->dev.dma_mask == DMA_BIT_MASK(63)) &&
		    (dma_set_coherent_mask(&pdev->dev, consistent_mask) &&
		     dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)))) {
			/*
			 * If 32 bit DMA mask fails, then try for 64 bit mask
			 * for FW capable of handling 64 bit DMA.
			 */
			scratch_pad_1 = megasas_readl
				(instance, &instance->reg_set->outbound_scratch_pad_1);

			if (!(scratch_pad_1 & MR_CAN_HANDLE_64_BIT_DMA_OFFSET))
				goto fail_set_dma_mask;
			else if (dma_set_mask_and_coherent(&pdev->dev,
							   DMA_BIT_MASK(63)))
				goto fail_set_dma_mask;
		}
	} else if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)))
		goto fail_set_dma_mask;

	if (pdev->dev.coherent_dma_mask == DMA_BIT_MASK(32))
		instance->consistent_mask_64bit = false;
	else
		instance->consistent_mask_64bit = true;

	dev_info(&pdev->dev, "%s bit DMA mask and %s bit consistent mask\n",
		 ((*pdev->dev.dma_mask == DMA_BIT_MASK(63)) ? "63" : "32"),
		 (instance->consistent_mask_64bit ? "63" : "32"));

	return 0;

fail_set_dma_mask:
	dev_err(&pdev->dev, "Failed to set DMA mask\n");
	return -1;

}

/*
 * megasas_set_adapter_type -	Set adapter type.
 *				Supported controllers can be divided in
 *				different categories-
 *					enum MR_ADAPTER_TYPE {
 *						MFI_SERIES = 1,
 *						THUNDERBOLT_SERIES = 2,
 *						INVADER_SERIES = 3,
 *						VENTURA_SERIES = 4,
 *						AERO_SERIES = 5,
 *					};
 * @instance:			Adapter soft state
 * return:			void
 */
static inline void megasas_set_adapter_type(struct megasas_instance *instance)
{
	if ((instance->pdev->vendor == PCI_VENDOR_ID_DELL) &&
	    (instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5)) {
		instance->adapter_type = MFI_SERIES;
	} else {
		switch (instance->pdev->device) {
		case PCI_DEVICE_ID_LSI_AERO_10E1:
		case PCI_DEVICE_ID_LSI_AERO_10E2:
		case PCI_DEVICE_ID_LSI_AERO_10E5:
		case PCI_DEVICE_ID_LSI_AERO_10E6:
			instance->adapter_type = AERO_SERIES;
			break;
		case PCI_DEVICE_ID_LSI_VENTURA:
		case PCI_DEVICE_ID_LSI_CRUSADER:
		case PCI_DEVICE_ID_LSI_HARPOON:
		case PCI_DEVICE_ID_LSI_TOMCAT:
		case PCI_DEVICE_ID_LSI_VENTURA_4PORT:
		case PCI_DEVICE_ID_LSI_CRUSADER_4PORT:
			instance->adapter_type = VENTURA_SERIES;
			break;
		case PCI_DEVICE_ID_LSI_FUSION:
		case PCI_DEVICE_ID_LSI_PLASMA:
			instance->adapter_type = THUNDERBOLT_SERIES;
			break;
		case PCI_DEVICE_ID_LSI_INVADER:
		case PCI_DEVICE_ID_LSI_INTRUDER:
		case PCI_DEVICE_ID_LSI_INTRUDER_24:
		case PCI_DEVICE_ID_LSI_CUTLASS_52:
		case PCI_DEVICE_ID_LSI_CUTLASS_53:
		case PCI_DEVICE_ID_LSI_FURY:
			instance->adapter_type = INVADER_SERIES;
			break;
		default: /* For all other supported controllers */
			instance->adapter_type = MFI_SERIES;
			break;
		}
	}
}

static inline int megasas_alloc_mfi_ctrl_mem(struct megasas_instance *instance)
{
	instance->producer = dma_alloc_coherent(&instance->pdev->dev,
			sizeof(u32), &instance->producer_h, GFP_KERNEL);
	instance->consumer = dma_alloc_coherent(&instance->pdev->dev,
			sizeof(u32), &instance->consumer_h, GFP_KERNEL);

	if (!instance->producer || !instance->consumer) {
		dev_err(&instance->pdev->dev,
			"Failed to allocate memory for producer, consumer\n");
		return -1;
	}

	*instance->producer = 0;
	*instance->consumer = 0;
	return 0;
}

/**
 * megasas_alloc_ctrl_mem -	Allocate per controller memory for core data
 *				structures which are not common across MFI
 *				adapters and fusion adapters.
 *				For MFI based adapters, allocate producer and
 *				consumer buffers. For fusion adapters, allocate
 *				memory for fusion context.
 * @instance:			Adapter soft state
 * return:			0 for SUCCESS
 */
static int megasas_alloc_ctrl_mem(struct megasas_instance *instance)
{
	instance->reply_map = kcalloc(nr_cpu_ids, sizeof(unsigned int),
				      GFP_KERNEL);
	if (!instance->reply_map)
		return -ENOMEM;

	switch (instance->adapter_type) {
	case MFI_SERIES:
		if (megasas_alloc_mfi_ctrl_mem(instance))
			goto fail;
		break;
	case AERO_SERIES:
	case VENTURA_SERIES:
	case THUNDERBOLT_SERIES:
	case INVADER_SERIES:
		if (megasas_alloc_fusion_context(instance))
			goto fail;
		break;
	}

	return 0;
 fail:
	kfree(instance->reply_map);
	instance->reply_map = NULL;
	return -ENOMEM;
}

/*
 * megasas_free_ctrl_mem -	Free fusion context for fusion adapters and
 *				producer, consumer buffers for MFI adapters
 *
 * @instance -			Adapter soft instance
 *
 */
static inline void megasas_free_ctrl_mem(struct megasas_instance *instance)
{
	kfree(instance->reply_map);
	if (instance->adapter_type == MFI_SERIES) {
		if (instance->producer)
			dma_free_coherent(&instance->pdev->dev, sizeof(u32),
					    instance->producer,
					    instance->producer_h);
		if (instance->consumer)
			dma_free_coherent(&instance->pdev->dev, sizeof(u32),
					    instance->consumer,
					    instance->consumer_h);
	} else {
		megasas_free_fusion_context(instance);
	}
}

/**
 * megasas_alloc_ctrl_dma_buffers -	Allocate consistent DMA buffers during
 *					driver load time
 *
 * @instance-				Adapter soft instance
 * @return-				O for SUCCESS
 */
static inline
int megasas_alloc_ctrl_dma_buffers(struct megasas_instance *instance)
{
	struct pci_dev *pdev = instance->pdev;
	struct fusion_context *fusion = instance->ctrl_context;

	instance->evt_detail = dma_alloc_coherent(&pdev->dev,
			sizeof(struct megasas_evt_detail),
			&instance->evt_detail_h, GFP_KERNEL);

	if (!instance->evt_detail) {
		dev_err(&instance->pdev->dev,
			"Failed to allocate event detail buffer\n");
		return -ENOMEM;
	}

	if (fusion) {
		fusion->ioc_init_request =
			dma_alloc_coherent(&pdev->dev,
					   sizeof(struct MPI2_IOC_INIT_REQUEST),
					   &fusion->ioc_init_request_phys,
					   GFP_KERNEL);

		if (!fusion->ioc_init_request) {
			dev_err(&pdev->dev,
				"Failed to allocate PD list buffer\n");
			return -ENOMEM;
		}

		instance->snapdump_prop = dma_alloc_coherent(&pdev->dev,
				sizeof(struct MR_SNAPDUMP_PROPERTIES),
				&instance->snapdump_prop_h, GFP_KERNEL);

		if (!instance->snapdump_prop)
			dev_err(&pdev->dev,
				"Failed to allocate snapdump properties buffer\n");

		instance->host_device_list_buf = dma_alloc_coherent(&pdev->dev,
							HOST_DEVICE_LIST_SZ,
							&instance->host_device_list_buf_h,
							GFP_KERNEL);

		if (!instance->host_device_list_buf) {
			dev_err(&pdev->dev,
				"Failed to allocate targetid list buffer\n");
			return -ENOMEM;
		}

	}

	instance->pd_list_buf =
		dma_alloc_coherent(&pdev->dev,
				     MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST),
				     &instance->pd_list_buf_h, GFP_KERNEL);

	if (!instance->pd_list_buf) {
		dev_err(&pdev->dev, "Failed to allocate PD list buffer\n");
		return -ENOMEM;
	}

	instance->ctrl_info_buf =
		dma_alloc_coherent(&pdev->dev,
				     sizeof(struct megasas_ctrl_info),
				     &instance->ctrl_info_buf_h, GFP_KERNEL);

	if (!instance->ctrl_info_buf) {
		dev_err(&pdev->dev,
			"Failed to allocate controller info buffer\n");
		return -ENOMEM;
	}

	instance->ld_list_buf =
		dma_alloc_coherent(&pdev->dev,
				     sizeof(struct MR_LD_LIST),
				     &instance->ld_list_buf_h, GFP_KERNEL);

	if (!instance->ld_list_buf) {
		dev_err(&pdev->dev, "Failed to allocate LD list buffer\n");
		return -ENOMEM;
	}

	instance->ld_targetid_list_buf =
		dma_alloc_coherent(&pdev->dev,
				sizeof(struct MR_LD_TARGETID_LIST),
				&instance->ld_targetid_list_buf_h, GFP_KERNEL);

	if (!instance->ld_targetid_list_buf) {
		dev_err(&pdev->dev,
			"Failed to allocate LD targetid list buffer\n");
		return -ENOMEM;
	}

	if (!reset_devices) {
		instance->system_info_buf =
			dma_alloc_coherent(&pdev->dev,
					sizeof(struct MR_DRV_SYSTEM_INFO),
					&instance->system_info_h, GFP_KERNEL);
		instance->pd_info =
			dma_alloc_coherent(&pdev->dev,
					sizeof(struct MR_PD_INFO),
					&instance->pd_info_h, GFP_KERNEL);
		instance->tgt_prop =
			dma_alloc_coherent(&pdev->dev,
					sizeof(struct MR_TARGET_PROPERTIES),
					&instance->tgt_prop_h, GFP_KERNEL);
		instance->crash_dump_buf =
			dma_alloc_coherent(&pdev->dev, CRASH_DMA_BUF_SIZE,
					&instance->crash_dump_h, GFP_KERNEL);

		if (!instance->system_info_buf)
			dev_err(&instance->pdev->dev,
				"Failed to allocate system info buffer\n");

		if (!instance->pd_info)
			dev_err(&instance->pdev->dev,
				"Failed to allocate pd_info buffer\n");

		if (!instance->tgt_prop)
			dev_err(&instance->pdev->dev,
				"Failed to allocate tgt_prop buffer\n");

		if (!instance->crash_dump_buf)
			dev_err(&instance->pdev->dev,
				"Failed to allocate crash dump buffer\n");
	}

	return 0;
}

/*
 * megasas_free_ctrl_dma_buffers -	Free consistent DMA buffers allocated
 *					during driver load time
 *
 * @instance-				Adapter soft instance
 *
 */
static inline
void megasas_free_ctrl_dma_buffers(struct megasas_instance *instance)
{
	struct pci_dev *pdev = instance->pdev;
	struct fusion_context *fusion = instance->ctrl_context;

	if (instance->evt_detail)
		dma_free_coherent(&pdev->dev, sizeof(struct megasas_evt_detail),
				    instance->evt_detail,
				    instance->evt_detail_h);

	if (fusion && fusion->ioc_init_request)
		dma_free_coherent(&pdev->dev,
				  sizeof(struct MPI2_IOC_INIT_REQUEST),
				  fusion->ioc_init_request,
				  fusion->ioc_init_request_phys);

	if (instance->pd_list_buf)
		dma_free_coherent(&pdev->dev,
				    MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST),
				    instance->pd_list_buf,
				    instance->pd_list_buf_h);

	if (instance->ld_list_buf)
		dma_free_coherent(&pdev->dev, sizeof(struct MR_LD_LIST),
				    instance->ld_list_buf,
				    instance->ld_list_buf_h);

	if (instance->ld_targetid_list_buf)
		dma_free_coherent(&pdev->dev, sizeof(struct MR_LD_TARGETID_LIST),
				    instance->ld_targetid_list_buf,
				    instance->ld_targetid_list_buf_h);

	if (instance->ctrl_info_buf)
		dma_free_coherent(&pdev->dev, sizeof(struct megasas_ctrl_info),
				    instance->ctrl_info_buf,
				    instance->ctrl_info_buf_h);

	if (instance->system_info_buf)
		dma_free_coherent(&pdev->dev, sizeof(struct MR_DRV_SYSTEM_INFO),
				    instance->system_info_buf,
				    instance->system_info_h);

	if (instance->pd_info)
		dma_free_coherent(&pdev->dev, sizeof(struct MR_PD_INFO),
				    instance->pd_info, instance->pd_info_h);

	if (instance->tgt_prop)
		dma_free_coherent(&pdev->dev, sizeof(struct MR_TARGET_PROPERTIES),
				    instance->tgt_prop, instance->tgt_prop_h);

	if (instance->crash_dump_buf)
		dma_free_coherent(&pdev->dev, CRASH_DMA_BUF_SIZE,
				    instance->crash_dump_buf,
				    instance->crash_dump_h);

	if (instance->snapdump_prop)
		dma_free_coherent(&pdev->dev,
				  sizeof(struct MR_SNAPDUMP_PROPERTIES),
				  instance->snapdump_prop,
				  instance->snapdump_prop_h);

	if (instance->host_device_list_buf)
		dma_free_coherent(&pdev->dev,
				  HOST_DEVICE_LIST_SZ,
				  instance->host_device_list_buf,
				  instance->host_device_list_buf_h);

}

/*
 * megasas_init_ctrl_params -		Initialize controller's instance
 *					parameters before FW init
 * @instance -				Adapter soft instance
 * @return -				void
 */
static inline void megasas_init_ctrl_params(struct megasas_instance *instance)
{
	instance->fw_crash_state = UNAVAILABLE;

	megasas_poll_wait_aen = 0;
	instance->issuepend_done = 1;
	atomic_set(&instance->adprecovery, MEGASAS_HBA_OPERATIONAL);

	/*
	 * Initialize locks and queues
	 */
	INIT_LIST_HEAD(&instance->cmd_pool);
	INIT_LIST_HEAD(&instance->internal_reset_pending_q);

	atomic_set(&instance->fw_outstanding, 0);
	atomic64_set(&instance->total_io_count, 0);

	init_waitqueue_head(&instance->int_cmd_wait_q);
	init_waitqueue_head(&instance->abort_cmd_wait_q);

	spin_lock_init(&instance->crashdump_lock);
	spin_lock_init(&instance->mfi_pool_lock);
	spin_lock_init(&instance->hba_lock);
	spin_lock_init(&instance->stream_lock);
	spin_lock_init(&instance->completion_lock);

	mutex_init(&instance->reset_mutex);

	if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
	    (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY))
		instance->flag_ieee = 1;

	megasas_dbg_lvl = 0;
	instance->flag = 0;
	instance->unload = 1;
	instance->last_time = 0;
	instance->disableOnlineCtrlReset = 1;
	instance->UnevenSpanSupport = 0;
	instance->smp_affinity_enable = smp_affinity_enable ? true : false;
	instance->msix_load_balance = false;

	if (instance->adapter_type != MFI_SERIES)
		INIT_WORK(&instance->work_init, megasas_fusion_ocr_wq);
	else
		INIT_WORK(&instance->work_init, process_fw_state_change_wq);
}

/**
 * megasas_probe_one -	PCI hotplug entry point
 * @pdev:		PCI device structure
 * @id:			PCI ids of supported hotplugged adapter
 */
static int megasas_probe_one(struct pci_dev *pdev,
			     const struct pci_device_id *id)
{
	int rval, pos;
	struct Scsi_Host *host;
	struct megasas_instance *instance;
	u16 control = 0;

	switch (pdev->device) {
	case PCI_DEVICE_ID_LSI_AERO_10E0:
	case PCI_DEVICE_ID_LSI_AERO_10E3:
	case PCI_DEVICE_ID_LSI_AERO_10E4:
	case PCI_DEVICE_ID_LSI_AERO_10E7:
		dev_err(&pdev->dev, "Adapter is in non secure mode\n");
		return 1;
	case PCI_DEVICE_ID_LSI_AERO_10E1:
	case PCI_DEVICE_ID_LSI_AERO_10E5:
		dev_info(&pdev->dev, "Adapter is in configurable secure mode\n");
		break;
	}

	/* Reset MSI-X in the kdump kernel */
	if (reset_devices) {
		pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
		if (pos) {
			pci_read_config_word(pdev, pos + PCI_MSIX_FLAGS,
					     &control);
			if (control & PCI_MSIX_FLAGS_ENABLE) {
				dev_info(&pdev->dev, "resetting MSI-X\n");
				pci_write_config_word(pdev,
						      pos + PCI_MSIX_FLAGS,
						      control &
						      ~PCI_MSIX_FLAGS_ENABLE);
			}
		}
	}

	/*
	 * PCI prepping: enable device set bus mastering and dma mask
	 */
	rval = pci_enable_device_mem(pdev);

	if (rval) {
		return rval;
	}

	pci_set_master(pdev);

	host = scsi_host_alloc(&megasas_template,
			       sizeof(struct megasas_instance));

	if (!host) {
		dev_printk(KERN_DEBUG, &pdev->dev, "scsi_host_alloc failed\n");
		goto fail_alloc_instance;
	}

	instance = (struct megasas_instance *)host->hostdata;
	memset(instance, 0, sizeof(*instance));
	atomic_set(&instance->fw_reset_no_pci_access, 0);

	/*
	 * Initialize PCI related and misc parameters
	 */
	instance->pdev = pdev;
	instance->host = host;
	instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
	instance->init_id = MEGASAS_DEFAULT_INIT_ID;

	megasas_set_adapter_type(instance);

	/*
	 * Initialize MFI Firmware
	 */
	if (megasas_init_fw(instance))
		goto fail_init_mfi;

	if (instance->requestorId) {
		if (instance->PlasmaFW111) {
			instance->vf_affiliation_111 =
				dma_alloc_coherent(&pdev->dev,
					sizeof(struct MR_LD_VF_AFFILIATION_111),
					&instance->vf_affiliation_111_h,
					GFP_KERNEL);
			if (!instance->vf_affiliation_111)
				dev_warn(&pdev->dev, "Can't allocate "
				       "memory for VF affiliation buffer\n");
		} else {
			instance->vf_affiliation =
				dma_alloc_coherent(&pdev->dev,
					(MAX_LOGICAL_DRIVES + 1) *
					sizeof(struct MR_LD_VF_AFFILIATION),
					&instance->vf_affiliation_h,
					GFP_KERNEL);
			if (!instance->vf_affiliation)
				dev_warn(&pdev->dev, "Can't allocate "
				       "memory for VF affiliation buffer\n");
		}
	}

	/*
	 * Store instance in PCI softstate
	 */
	pci_set_drvdata(pdev, instance);

	/*
	 * Add this controller to megasas_mgmt_info structure so that it
	 * can be exported to management applications
	 */
	megasas_mgmt_info.count++;
	megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance;
	megasas_mgmt_info.max_index++;

	/*
	 * Register with SCSI mid-layer
	 */
	if (megasas_io_attach(instance))
		goto fail_io_attach;

	instance->unload = 0;
	/*
	 * Trigger SCSI to scan our drives
	 */
	if (!instance->enable_fw_dev_list ||
	    (instance->host_device_list_buf->count > 0))
		scsi_scan_host(host);

	/*
	 * Initiate AEN (Asynchronous Event Notification)
	 */
	if (megasas_start_aen(instance)) {
		dev_printk(KERN_DEBUG, &pdev->dev, "start aen failed\n");
		goto fail_start_aen;
	}

	megasas_setup_debugfs(instance);

	/* Get current SR-IOV LD/VF affiliation */
	if (instance->requestorId)
		megasas_get_ld_vf_affiliation(instance, 1);

	return 0;

fail_start_aen:
fail_io_attach:
	megasas_mgmt_info.count--;
	megasas_mgmt_info.max_index--;
	megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL;

	instance->instancet->disable_intr(instance);
	megasas_destroy_irqs(instance);

	if (instance->adapter_type != MFI_SERIES)
		megasas_release_fusion(instance);
	else
		megasas_release_mfi(instance);
	if (instance->msix_vectors)
		pci_free_irq_vectors(instance->pdev);
fail_init_mfi:
	scsi_host_put(host);
fail_alloc_instance:
	pci_disable_device(pdev);

	return -ENODEV;
}

/**
 * megasas_flush_cache -	Requests FW to flush all its caches
 * @instance:			Adapter soft state
 */
static void megasas_flush_cache(struct megasas_instance *instance)
{
	struct megasas_cmd *cmd;
	struct megasas_dcmd_frame *dcmd;

	if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
		return;

	cmd = megasas_get_cmd(instance);

	if (!cmd)
		return;

	dcmd = &cmd->frame->dcmd;

	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);

	dcmd->cmd = MFI_CMD_DCMD;
	dcmd->cmd_status = 0x0;
	dcmd->sge_count = 0;
	dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_NONE);
	dcmd->timeout = 0;
	dcmd->pad_0 = 0;
	dcmd->data_xfer_len = 0;
	dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_CACHE_FLUSH);
	dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;

	if (megasas_issue_blocked_cmd(instance, cmd, MFI_IO_TIMEOUT_SECS)
			!= DCMD_SUCCESS) {
		dev_err(&instance->pdev->dev,
			"return from %s %d\n", __func__, __LINE__);
		return;
	}

	megasas_return_cmd(instance, cmd);
}

/**
 * megasas_shutdown_controller -	Instructs FW to shutdown the controller
 * @instance:				Adapter soft state
 * @opcode:				Shutdown/Hibernate
 */
static void megasas_shutdown_controller(struct megasas_instance *instance,
					u32 opcode)
{
	struct megasas_cmd *cmd;
	struct megasas_dcmd_frame *dcmd;

	if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
		return;

	cmd = megasas_get_cmd(instance);

	if (!cmd)
		return;

	if (instance->aen_cmd)
		megasas_issue_blocked_abort_cmd(instance,
			instance->aen_cmd, MFI_IO_TIMEOUT_SECS);
	if (instance->map_update_cmd)
		megasas_issue_blocked_abort_cmd(instance,
			instance->map_update_cmd, MFI_IO_TIMEOUT_SECS);
	if (instance->jbod_seq_cmd)
		megasas_issue_blocked_abort_cmd(instance,
			instance->jbod_seq_cmd, MFI_IO_TIMEOUT_SECS);

	dcmd = &cmd->frame->dcmd;

	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);

	dcmd->cmd = MFI_CMD_DCMD;
	dcmd->cmd_status = 0x0;
	dcmd->sge_count = 0;
	dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_NONE);
	dcmd->timeout = 0;
	dcmd->pad_0 = 0;
	dcmd->data_xfer_len = 0;
	dcmd->opcode = cpu_to_le32(opcode);

	if (megasas_issue_blocked_cmd(instance, cmd, MFI_IO_TIMEOUT_SECS)
			!= DCMD_SUCCESS) {
		dev_err(&instance->pdev->dev,
			"return from %s %d\n", __func__, __LINE__);
		return;
	}

	megasas_return_cmd(instance, cmd);
}

#ifdef CONFIG_PM
/**
 * megasas_suspend -	driver suspend entry point
 * @pdev:		PCI device structure
 * @state:		PCI power state to suspend routine
 */
static int
megasas_suspend(struct pci_dev *pdev, pm_message_t state)
{
	struct megasas_instance *instance;

	instance = pci_get_drvdata(pdev);

	if (!instance)
		return 0;

	instance->unload = 1;

	dev_info(&pdev->dev, "%s is called\n", __func__);

	/* Shutdown SR-IOV heartbeat timer */
	if (instance->requestorId && !instance->skip_heartbeat_timer_del)
		del_timer_sync(&instance->sriov_heartbeat_timer);

	/* Stop the FW fault detection watchdog */
	if (instance->adapter_type != MFI_SERIES)
		megasas_fusion_stop_watchdog(instance);

	megasas_flush_cache(instance);
	megasas_shutdown_controller(instance, MR_DCMD_HIBERNATE_SHUTDOWN);

	/* cancel the delayed work if this work still in queue */
	if (instance->ev != NULL) {
		struct megasas_aen_event *ev = instance->ev;
		cancel_delayed_work_sync(&ev->hotplug_work);
		instance->ev = NULL;
	}

	tasklet_kill(&instance->isr_tasklet);

	pci_set_drvdata(instance->pdev, instance);
	instance->instancet->disable_intr(instance);

	megasas_destroy_irqs(instance);

	if (instance->msix_vectors)
		pci_free_irq_vectors(instance->pdev);

	pci_save_state(pdev);
	pci_disable_device(pdev);

	pci_set_power_state(pdev, pci_choose_state(pdev, state));

	return 0;
}

/**
 * megasas_resume-      driver resume entry point
 * @pdev:               PCI device structure
 */
static int
megasas_resume(struct pci_dev *pdev)
{
	int rval;
	struct Scsi_Host *host;
	struct megasas_instance *instance;
	int irq_flags = PCI_IRQ_LEGACY;

	instance = pci_get_drvdata(pdev);

	if (!instance)
		return 0;

	host = instance->host;
	pci_set_power_state(pdev, PCI_D0);
	pci_enable_wake(pdev, PCI_D0, 0);
	pci_restore_state(pdev);

	dev_info(&pdev->dev, "%s is called\n", __func__);
	/*
	 * PCI prepping: enable device set bus mastering and dma mask
	 */
	rval = pci_enable_device_mem(pdev);

	if (rval) {
		dev_err(&pdev->dev, "Enable device failed\n");
		return rval;
	}

	pci_set_master(pdev);

	/*
	 * We expect the FW state to be READY
	 */
	if (megasas_transition_to_ready(instance, 0))
		goto fail_ready_state;

	if (megasas_set_dma_mask(instance))
		goto fail_set_dma_mask;

	/*
	 * Initialize MFI Firmware
	 */

	atomic_set(&instance->fw_outstanding, 0);
	atomic_set(&instance->ldio_outstanding, 0);

	/* Now re-enable MSI-X */
	if (instance->msix_vectors) {
		irq_flags = PCI_IRQ_MSIX;
		if (instance->smp_affinity_enable)
			irq_flags |= PCI_IRQ_AFFINITY;
	}
	rval = pci_alloc_irq_vectors(instance->pdev, 1,
				     instance->msix_vectors ?
				     instance->msix_vectors : 1, irq_flags);
	if (rval < 0)
		goto fail_reenable_msix;

	megasas_setup_reply_map(instance);

	if (instance->adapter_type != MFI_SERIES) {
		megasas_reset_reply_desc(instance);
		if (megasas_ioc_init_fusion(instance)) {
			megasas_free_cmds(instance);
			megasas_free_cmds_fusion(instance);
			goto fail_init_mfi;
		}
		if (!megasas_get_map_info(instance))
			megasas_sync_map_info(instance);
	} else {
		*instance->producer = 0;
		*instance->consumer = 0;
		if (megasas_issue_init_mfi(instance))
			goto fail_init_mfi;
	}

	if (megasas_get_ctrl_info(instance) != DCMD_SUCCESS)
		goto fail_init_mfi;

	tasklet_init(&instance->isr_tasklet, instance->instancet->tasklet,
		     (unsigned long)instance);

	if (instance->msix_vectors ?
			megasas_setup_irqs_msix(instance, 0) :
			megasas_setup_irqs_ioapic(instance))
		goto fail_init_mfi;

	if (instance->adapter_type != MFI_SERIES)
		megasas_setup_irq_poll(instance);

	/* Re-launch SR-IOV heartbeat timer */
	if (instance->requestorId) {
		if (!megasas_sriov_start_heartbeat(instance, 0))
			megasas_start_timer(instance);
		else {
			instance->skip_heartbeat_timer_del = 1;
			goto fail_init_mfi;
		}
	}

	instance->instancet->enable_intr(instance);
	megasas_setup_jbod_map(instance);
	instance->unload = 0;

	/*
	 * Initiate AEN (Asynchronous Event Notification)
	 */
	if (megasas_start_aen(instance))
		dev_err(&instance->pdev->dev, "Start AEN failed\n");

	/* Re-launch FW fault watchdog */
	if (instance->adapter_type != MFI_SERIES)
		if (megasas_fusion_start_watchdog(instance) != SUCCESS)
			goto fail_start_watchdog;

	return 0;

fail_start_watchdog:
	if (instance->requestorId && !instance->skip_heartbeat_timer_del)
		del_timer_sync(&instance->sriov_heartbeat_timer);
fail_init_mfi:
	megasas_free_ctrl_dma_buffers(instance);
	megasas_free_ctrl_mem(instance);
	scsi_host_put(host);

fail_reenable_msix:
fail_set_dma_mask:
fail_ready_state:

	pci_disable_device(pdev);

	return -ENODEV;
}
#else
#define megasas_suspend	NULL
#define megasas_resume	NULL
#endif

static inline int
megasas_wait_for_adapter_operational(struct megasas_instance *instance)
{
	int wait_time = MEGASAS_RESET_WAIT_TIME * 2;
	int i;
	u8 adp_state;

	for (i = 0; i < wait_time; i++) {
		adp_state = atomic_read(&instance->adprecovery);
		if ((adp_state == MEGASAS_HBA_OPERATIONAL) ||
		    (adp_state == MEGASAS_HW_CRITICAL_ERROR))
			break;

		if (!(i % MEGASAS_RESET_NOTICE_INTERVAL))
			dev_notice(&instance->pdev->dev, "waiting for controller reset to finish\n");

		msleep(1000);
	}

	if (adp_state != MEGASAS_HBA_OPERATIONAL) {
		dev_info(&instance->pdev->dev,
			 "%s HBA failed to become operational, adp_state %d\n",
			 __func__, adp_state);
		return 1;
	}

	return 0;
}

/**
 * megasas_detach_one -	PCI hot"un"plug entry point
 * @pdev:		PCI device structure
 */
static void megasas_detach_one(struct pci_dev *pdev)
{
	int i;
	struct Scsi_Host *host;
	struct megasas_instance *instance;
	struct fusion_context *fusion;
	u32 pd_seq_map_sz;

	instance = pci_get_drvdata(pdev);

	if (!instance)
		return;

	host = instance->host;
	fusion = instance->ctrl_context;

	/* Shutdown SR-IOV heartbeat timer */
	if (instance->requestorId && !instance->skip_heartbeat_timer_del)
		del_timer_sync(&instance->sriov_heartbeat_timer);

	/* Stop the FW fault detection watchdog */
	if (instance->adapter_type != MFI_SERIES)
		megasas_fusion_stop_watchdog(instance);

	if (instance->fw_crash_state != UNAVAILABLE)
		megasas_free_host_crash_buffer(instance);
	scsi_remove_host(instance->host);
	instance->unload = 1;

	if (megasas_wait_for_adapter_operational(instance))
		goto skip_firing_dcmds;

	megasas_flush_cache(instance);
	megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);

skip_firing_dcmds:
	/* cancel the delayed work if this work still in queue*/
	if (instance->ev != NULL) {
		struct megasas_aen_event *ev = instance->ev;
		cancel_delayed_work_sync(&ev->hotplug_work);
		instance->ev = NULL;
	}

	/* cancel all wait events */
	wake_up_all(&instance->int_cmd_wait_q);

	tasklet_kill(&instance->isr_tasklet);

	/*
	 * Take the instance off the instance array. Note that we will not
	 * decrement the max_index. We let this array be sparse array
	 */
	for (i = 0; i < megasas_mgmt_info.max_index; i++) {
		if (megasas_mgmt_info.instance[i] == instance) {
			megasas_mgmt_info.count--;
			megasas_mgmt_info.instance[i] = NULL;

			break;
		}
	}

	instance->instancet->disable_intr(instance);

	megasas_destroy_irqs(instance);

	if (instance->msix_vectors)
		pci_free_irq_vectors(instance->pdev);

	if (instance->adapter_type >= VENTURA_SERIES) {
		for (i = 0; i < MAX_LOGICAL_DRIVES_EXT; ++i)
			kfree(fusion->stream_detect_by_ld[i]);
		kfree(fusion->stream_detect_by_ld);
		fusion->stream_detect_by_ld = NULL;
	}


	if (instance->adapter_type != MFI_SERIES) {
		megasas_release_fusion(instance);
			pd_seq_map_sz = sizeof(struct MR_PD_CFG_SEQ_NUM_SYNC) +
				(sizeof(struct MR_PD_CFG_SEQ) *
					(MAX_PHYSICAL_DEVICES - 1));
		for (i = 0; i < 2 ; i++) {
			if (fusion->ld_map[i])
				dma_free_coherent(&instance->pdev->dev,
						  fusion->max_map_sz,
						  fusion->ld_map[i],
						  fusion->ld_map_phys[i]);
			if (fusion->ld_drv_map[i]) {
				if (is_vmalloc_addr(fusion->ld_drv_map[i]))
					vfree(fusion->ld_drv_map[i]);
				else
					free_pages((ulong)fusion->ld_drv_map[i],
						   fusion->drv_map_pages);
			}

			if (fusion->pd_seq_sync[i])
				dma_free_coherent(&instance->pdev->dev,
					pd_seq_map_sz,
					fusion->pd_seq_sync[i],
					fusion->pd_seq_phys[i]);
		}
	} else {
		megasas_release_mfi(instance);
	}

	if (instance->vf_affiliation)
		dma_free_coherent(&pdev->dev, (MAX_LOGICAL_DRIVES + 1) *
				    sizeof(struct MR_LD_VF_AFFILIATION),
				    instance->vf_affiliation,
				    instance->vf_affiliation_h);

	if (instance->vf_affiliation_111)
		dma_free_coherent(&pdev->dev,
				    sizeof(struct MR_LD_VF_AFFILIATION_111),
				    instance->vf_affiliation_111,
				    instance->vf_affiliation_111_h);

	if (instance->hb_host_mem)
		dma_free_coherent(&pdev->dev, sizeof(struct MR_CTRL_HB_HOST_MEM),
				    instance->hb_host_mem,
				    instance->hb_host_mem_h);

	megasas_free_ctrl_dma_buffers(instance);

	megasas_free_ctrl_mem(instance);

	megasas_destroy_debugfs(instance);

	scsi_host_put(host);

	pci_disable_device(pdev);
}

/**
 * megasas_shutdown -	Shutdown entry point
 * @device:		Generic device structure
 */
static void megasas_shutdown(struct pci_dev *pdev)
{
	struct megasas_instance *instance = pci_get_drvdata(pdev);

	if (!instance)
		return;

	instance->unload = 1;

	if (megasas_wait_for_adapter_operational(instance))
		goto skip_firing_dcmds;

	megasas_flush_cache(instance);
	megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);

skip_firing_dcmds:
	instance->instancet->disable_intr(instance);
	megasas_destroy_irqs(instance);

	if (instance->msix_vectors)
		pci_free_irq_vectors(instance->pdev);
}

/**
 * megasas_mgmt_open -	char node "open" entry point
 */
static int megasas_mgmt_open(struct inode *inode, struct file *filep)
{
	/*
	 * Allow only those users with admin rights
	 */
	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	return 0;
}

/**
 * megasas_mgmt_fasync -	Async notifier registration from applications
 *
 * This function adds the calling process to a driver global queue. When an
 * event occurs, SIGIO will be sent to all processes in this queue.
 */
static int megasas_mgmt_fasync(int fd, struct file *filep, int mode)
{
	int rc;

	mutex_lock(&megasas_async_queue_mutex);

	rc = fasync_helper(fd, filep, mode, &megasas_async_queue);

	mutex_unlock(&megasas_async_queue_mutex);

	if (rc >= 0) {
		/* For sanity check when we get ioctl */
		filep->private_data = filep;
		return 0;
	}

	printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc);

	return rc;
}

/**
 * megasas_mgmt_poll -  char node "poll" entry point
 * */
static __poll_t megasas_mgmt_poll(struct file *file, poll_table *wait)
{
	__poll_t mask;
	unsigned long flags;

	poll_wait(file, &megasas_poll_wait, wait);
	spin_lock_irqsave(&poll_aen_lock, flags);
	if (megasas_poll_wait_aen)
		mask = (EPOLLIN | EPOLLRDNORM);
	else
		mask = 0;
	megasas_poll_wait_aen = 0;
	spin_unlock_irqrestore(&poll_aen_lock, flags);
	return mask;
}

/*
 * megasas_set_crash_dump_params_ioctl:
 *		Send CRASH_DUMP_MODE DCMD to all controllers
 * @cmd:	MFI command frame
 */

static int megasas_set_crash_dump_params_ioctl(struct megasas_cmd *cmd)
{
	struct megasas_instance *local_instance;
	int i, error = 0;
	int crash_support;

	crash_support = cmd->frame->dcmd.mbox.w[0];

	for (i = 0; i < megasas_mgmt_info.max_index; i++) {
		local_instance = megasas_mgmt_info.instance[i];
		if (local_instance && local_instance->crash_dump_drv_support) {
			if ((atomic_read(&local_instance->adprecovery) ==
				MEGASAS_HBA_OPERATIONAL) &&
				!megasas_set_crash_dump_params(local_instance,
					crash_support)) {
				local_instance->crash_dump_app_support =
					crash_support;
				dev_info(&local_instance->pdev->dev,
					"Application firmware crash "
					"dump mode set success\n");
				error = 0;
			} else {
				dev_info(&local_instance->pdev->dev,
					"Application firmware crash "
					"dump mode set failed\n");
				error = -1;
			}
		}
	}
	return error;
}

/**
 * megasas_mgmt_fw_ioctl -	Issues management ioctls to FW
 * @instance:			Adapter soft state
 * @argp:			User's ioctl packet
 */
static int
megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
		      struct megasas_iocpacket __user * user_ioc,
		      struct megasas_iocpacket *ioc)
{
	struct megasas_sge64 *kern_sge64 = NULL;
	struct megasas_sge32 *kern_sge32 = NULL;
	struct megasas_cmd *cmd;
	void *kbuff_arr[MAX_IOCTL_SGE];
	dma_addr_t buf_handle = 0;
	int error = 0, i;
	void *sense = NULL;
	dma_addr_t sense_handle;
	unsigned long *sense_ptr;
	u32 opcode = 0;

	memset(kbuff_arr, 0, sizeof(kbuff_arr));

	if (ioc->sge_count > MAX_IOCTL_SGE) {
		dev_printk(KERN_DEBUG, &instance->pdev->dev, "SGE count [%d] >  max limit [%d]\n",
		       ioc->sge_count, MAX_IOCTL_SGE);
		return -EINVAL;
	}

	if ((ioc->frame.hdr.cmd >= MFI_CMD_OP_COUNT) ||
	    ((ioc->frame.hdr.cmd == MFI_CMD_NVME) &&
	    !instance->support_nvme_passthru) ||
	    ((ioc->frame.hdr.cmd == MFI_CMD_TOOLBOX) &&
	    !instance->support_pci_lane_margining)) {
		dev_err(&instance->pdev->dev,
			"Received invalid ioctl command 0x%x\n",
			ioc->frame.hdr.cmd);
		return -ENOTSUPP;
	}

	cmd = megasas_get_cmd(instance);
	if (!cmd) {
		dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to get a cmd packet\n");
		return -ENOMEM;
	}

	/*
	 * User's IOCTL packet has 2 frames (maximum). Copy those two
	 * frames into our cmd's frames. cmd->frame's context will get
	 * overwritten when we copy from user's frames. So set that value
	 * alone separately
	 */
	memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE);
	cmd->frame->hdr.context = cpu_to_le32(cmd->index);
	cmd->frame->hdr.pad_0 = 0;

	cmd->frame->hdr.flags &= (~MFI_FRAME_IEEE);

	if (instance->consistent_mask_64bit)
		cmd->frame->hdr.flags |= cpu_to_le16((MFI_FRAME_SGL64 |
				       MFI_FRAME_SENSE64));
	else
		cmd->frame->hdr.flags &= cpu_to_le16(~(MFI_FRAME_SGL64 |
					       MFI_FRAME_SENSE64));

	if (cmd->frame->hdr.cmd == MFI_CMD_DCMD)
		opcode = le32_to_cpu(cmd->frame->dcmd.opcode);

	if (opcode == MR_DCMD_CTRL_SHUTDOWN) {
		mutex_lock(&instance->reset_mutex);
		if (megasas_get_ctrl_info(instance) != DCMD_SUCCESS) {
			megasas_return_cmd(instance, cmd);
			mutex_unlock(&instance->reset_mutex);
			return -1;
		}
		mutex_unlock(&instance->reset_mutex);
	}

	if (opcode == MR_DRIVER_SET_APP_CRASHDUMP_MODE) {
		error = megasas_set_crash_dump_params_ioctl(cmd);
		megasas_return_cmd(instance, cmd);
		return error;
	}

	/*
	 * The management interface between applications and the fw uses
	 * MFI frames. E.g, RAID configuration changes, LD property changes
	 * etc are accomplishes through different kinds of MFI frames. The
	 * driver needs to care only about substituting user buffers with
	 * kernel buffers in SGLs. The location of SGL is embedded in the
	 * struct iocpacket itself.
	 */
	if (instance->consistent_mask_64bit)
		kern_sge64 = (struct megasas_sge64 *)
			((unsigned long)cmd->frame + ioc->sgl_off);
	else
		kern_sge32 = (struct megasas_sge32 *)
			((unsigned long)cmd->frame + ioc->sgl_off);

	/*
	 * For each user buffer, create a mirror buffer and copy in
	 */
	for (i = 0; i < ioc->sge_count; i++) {
		if (!ioc->sgl[i].iov_len)
			continue;

		kbuff_arr[i] = dma_alloc_coherent(&instance->pdev->dev,
						    ioc->sgl[i].iov_len,
						    &buf_handle, GFP_KERNEL);
		if (!kbuff_arr[i]) {
			dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to alloc "
			       "kernel SGL buffer for IOCTL\n");
			error = -ENOMEM;
			goto out;
		}

		/*
		 * We don't change the dma_coherent_mask, so
		 * dma_alloc_coherent only returns 32bit addresses
		 */
		if (instance->consistent_mask_64bit) {
			kern_sge64[i].phys_addr = cpu_to_le64(buf_handle);
			kern_sge64[i].length = cpu_to_le32(ioc->sgl[i].iov_len);
		} else {
			kern_sge32[i].phys_addr = cpu_to_le32(buf_handle);
			kern_sge32[i].length = cpu_to_le32(ioc->sgl[i].iov_len);
		}

		/*
		 * We created a kernel buffer corresponding to the
		 * user buffer. Now copy in from the user buffer
		 */
		if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base,
				   (u32) (ioc->sgl[i].iov_len))) {
			error = -EFAULT;
			goto out;
		}
	}

	if (ioc->sense_len) {
		sense = dma_alloc_coherent(&instance->pdev->dev, ioc->sense_len,
					     &sense_handle, GFP_KERNEL);
		if (!sense) {
			error = -ENOMEM;
			goto out;
		}

		sense_ptr =
		(unsigned long *) ((unsigned long)cmd->frame + ioc->sense_off);
		if (instance->consistent_mask_64bit)
			*sense_ptr = cpu_to_le64(sense_handle);
		else
			*sense_ptr = cpu_to_le32(sense_handle);
	}

	/*
	 * Set the sync_cmd flag so that the ISR knows not to complete this
	 * cmd to the SCSI mid-layer
	 */
	cmd->sync_cmd = 1;
	if (megasas_issue_blocked_cmd(instance, cmd, 0) == DCMD_NOT_FIRED) {
		cmd->sync_cmd = 0;
		dev_err(&instance->pdev->dev,
			"return -EBUSY from %s %d cmd 0x%x opcode 0x%x cmd->cmd_status_drv 0x%x\n",
			__func__, __LINE__, cmd->frame->hdr.cmd, opcode,
			cmd->cmd_status_drv);
		return -EBUSY;
	}

	cmd->sync_cmd = 0;

	if (instance->unload == 1) {
		dev_info(&instance->pdev->dev, "Driver unload is in progress "
			"don't submit data to application\n");
		goto out;
	}
	/*
	 * copy out the kernel buffers to user buffers
	 */
	for (i = 0; i < ioc->sge_count; i++) {
		if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i],
				 ioc->sgl[i].iov_len)) {
			error = -EFAULT;
			goto out;
		}
	}

	/*
	 * copy out the sense
	 */
	if (ioc->sense_len) {
		/*
		 * sense_ptr points to the location that has the user
		 * sense buffer address
		 */
		sense_ptr = (unsigned long *) ((unsigned long)ioc->frame.raw +
				ioc->sense_off);

		if (copy_to_user((void __user *)((unsigned long)
				 get_unaligned((unsigned long *)sense_ptr)),
				 sense, ioc->sense_len)) {
			dev_err(&instance->pdev->dev, "Failed to copy out to user "
					"sense data\n");
			error = -EFAULT;
			goto out;
		}
	}

	/*
	 * copy the status codes returned by the fw
	 */
	if (copy_to_user(&user_ioc->frame.hdr.cmd_status,
			 &cmd->frame->hdr.cmd_status, sizeof(u8))) {
		dev_printk(KERN_DEBUG, &instance->pdev->dev, "Error copying out cmd_status\n");
		error = -EFAULT;
	}

out:
	if (sense) {
		dma_free_coherent(&instance->pdev->dev, ioc->sense_len,
				    sense, sense_handle);
	}

	for (i = 0; i < ioc->sge_count; i++) {
		if (kbuff_arr[i]) {
			if (instance->consistent_mask_64bit)
				dma_free_coherent(&instance->pdev->dev,
					le32_to_cpu(kern_sge64[i].length),
					kbuff_arr[i],
					le64_to_cpu(kern_sge64[i].phys_addr));
			else
				dma_free_coherent(&instance->pdev->dev,
					le32_to_cpu(kern_sge32[i].length),
					kbuff_arr[i],
					le32_to_cpu(kern_sge32[i].phys_addr));
			kbuff_arr[i] = NULL;
		}
	}

	megasas_return_cmd(instance, cmd);
	return error;
}

static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg)
{
	struct megasas_iocpacket __user *user_ioc =
	    (struct megasas_iocpacket __user *)arg;
	struct megasas_iocpacket *ioc;
	struct megasas_instance *instance;
	int error;

	ioc = memdup_user(user_ioc, sizeof(*ioc));
	if (IS_ERR(ioc))
		return PTR_ERR(ioc);

	instance = megasas_lookup_instance(ioc->host_no);
	if (!instance) {
		error = -ENODEV;
		goto out_kfree_ioc;
	}

	/* Block ioctls in VF mode */
	if (instance->requestorId && !allow_vf_ioctls) {
		error = -ENODEV;
		goto out_kfree_ioc;
	}

	if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) {
		dev_err(&instance->pdev->dev, "Controller in crit error\n");
		error = -ENODEV;
		goto out_kfree_ioc;
	}

	if (instance->unload == 1) {
		error = -ENODEV;
		goto out_kfree_ioc;
	}

	if (down_interruptible(&instance->ioctl_sem)) {
		error = -ERESTARTSYS;
		goto out_kfree_ioc;
	}

	if  (megasas_wait_for_adapter_operational(instance)) {
		error = -ENODEV;
		goto out_up;
	}

	error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc);
out_up:
	up(&instance->ioctl_sem);

out_kfree_ioc:
	kfree(ioc);
	return error;
}

static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg)
{
	struct megasas_instance *instance;
	struct megasas_aen aen;
	int error;

	if (file->private_data != file) {
		printk(KERN_DEBUG "megasas: fasync_helper was not "
		       "called first\n");
		return -EINVAL;
	}

	if (copy_from_user(&aen, (void __user *)arg, sizeof(aen)))
		return -EFAULT;

	instance = megasas_lookup_instance(aen.host_no);

	if (!instance)
		return -ENODEV;

	if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) {
		return -ENODEV;
	}

	if (instance->unload == 1) {
		return -ENODEV;
	}

	if  (megasas_wait_for_adapter_operational(instance))
		return -ENODEV;

	mutex_lock(&instance->reset_mutex);
	error = megasas_register_aen(instance, aen.seq_num,
				     aen.class_locale_word);
	mutex_unlock(&instance->reset_mutex);
	return error;
}

/**
 * megasas_mgmt_ioctl -	char node ioctl entry point
 */
static long
megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	switch (cmd) {
	case MEGASAS_IOC_FIRMWARE:
		return megasas_mgmt_ioctl_fw(file, arg);

	case MEGASAS_IOC_GET_AEN:
		return megasas_mgmt_ioctl_aen(file, arg);
	}

	return -ENOTTY;
}

#ifdef CONFIG_COMPAT
static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg)
{
	struct compat_megasas_iocpacket __user *cioc =
	    (struct compat_megasas_iocpacket __user *)arg;
	struct megasas_iocpacket __user *ioc =
	    compat_alloc_user_space(sizeof(struct megasas_iocpacket));
	int i;
	int error = 0;
	compat_uptr_t ptr;
	u32 local_sense_off;
	u32 local_sense_len;
	u32 user_sense_off;

	if (clear_user(ioc, sizeof(*ioc)))
		return -EFAULT;

	if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) ||
	    copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) ||
	    copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) ||
	    copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) ||
	    copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) ||
	    copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32)))
		return -EFAULT;

	/*
	 * The sense_ptr is used in megasas_mgmt_fw_ioctl only when
	 * sense_len is not null, so prepare the 64bit value under
	 * the same condition.
	 */
	if (get_user(local_sense_off, &ioc->sense_off) ||
		get_user(local_sense_len, &ioc->sense_len) ||
		get_user(user_sense_off, &cioc->sense_off))
		return -EFAULT;

	if (local_sense_off != user_sense_off)
		return -EINVAL;

	if (local_sense_len) {
		void __user **sense_ioc_ptr =
			(void __user **)((u8 *)((unsigned long)&ioc->frame.raw) + local_sense_off);
		compat_uptr_t *sense_cioc_ptr =
			(compat_uptr_t *)(((unsigned long)&cioc->frame.raw) + user_sense_off);
		if (get_user(ptr, sense_cioc_ptr) ||
		    put_user(compat_ptr(ptr), sense_ioc_ptr))
			return -EFAULT;
	}

	for (i = 0; i < MAX_IOCTL_SGE; i++) {
		if (get_user(ptr, &cioc->sgl[i].iov_base) ||
		    put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) ||
		    copy_in_user(&ioc->sgl[i].iov_len,
				 &cioc->sgl[i].iov_len, sizeof(compat_size_t)))
			return -EFAULT;
	}

	error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc);

	if (copy_in_user(&cioc->frame.hdr.cmd_status,
			 &ioc->frame.hdr.cmd_status, sizeof(u8))) {
		printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n");
		return -EFAULT;
	}
	return error;
}

static long
megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
			  unsigned long arg)
{
	switch (cmd) {
	case MEGASAS_IOC_FIRMWARE32:
		return megasas_mgmt_compat_ioctl_fw(file, arg);
	case MEGASAS_IOC_GET_AEN:
		return megasas_mgmt_ioctl_aen(file, arg);
	}

	return -ENOTTY;
}
#endif

/*
 * File operations structure for management interface
 */
static const struct file_operations megasas_mgmt_fops = {
	.owner = THIS_MODULE,
	.open = megasas_mgmt_open,
	.fasync = megasas_mgmt_fasync,
	.unlocked_ioctl = megasas_mgmt_ioctl,
	.poll = megasas_mgmt_poll,
#ifdef CONFIG_COMPAT
	.compat_ioctl = megasas_mgmt_compat_ioctl,
#endif
	.llseek = noop_llseek,
};

/*
 * PCI hotplug support registration structure
 */
static struct pci_driver megasas_pci_driver = {

	.name = "megaraid_sas",
	.id_table = megasas_pci_table,
	.probe = megasas_probe_one,
	.remove = megasas_detach_one,
	.suspend = megasas_suspend,
	.resume = megasas_resume,
	.shutdown = megasas_shutdown,
};

/*
 * Sysfs driver attributes
 */
static ssize_t version_show(struct device_driver *dd, char *buf)
{
	return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n",
			MEGASAS_VERSION);
}
static DRIVER_ATTR_RO(version);

static ssize_t release_date_show(struct device_driver *dd, char *buf)
{
	return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n",
		MEGASAS_RELDATE);
}
static DRIVER_ATTR_RO(release_date);

static ssize_t support_poll_for_event_show(struct device_driver *dd, char *buf)
{
	return sprintf(buf, "%u\n", support_poll_for_event);
}
static DRIVER_ATTR_RO(support_poll_for_event);

static ssize_t support_device_change_show(struct device_driver *dd, char *buf)
{
	return sprintf(buf, "%u\n", support_device_change);
}
static DRIVER_ATTR_RO(support_device_change);

static ssize_t dbg_lvl_show(struct device_driver *dd, char *buf)
{
	return sprintf(buf, "%u\n", megasas_dbg_lvl);
}

static ssize_t dbg_lvl_store(struct device_driver *dd, const char *buf,
			     size_t count)
{
	int retval = count;

	if (sscanf(buf, "%u", &megasas_dbg_lvl) < 1) {
		printk(KERN_ERR "megasas: could not set dbg_lvl\n");
		retval = -EINVAL;
	}
	return retval;
}
static DRIVER_ATTR_RW(dbg_lvl);

static ssize_t
support_nvme_encapsulation_show(struct device_driver *dd, char *buf)
{
	return sprintf(buf, "%u\n", support_nvme_encapsulation);
}

static DRIVER_ATTR_RO(support_nvme_encapsulation);

static ssize_t
support_pci_lane_margining_show(struct device_driver *dd, char *buf)
{
	return sprintf(buf, "%u\n", support_pci_lane_margining);
}

static DRIVER_ATTR_RO(support_pci_lane_margining);

static inline void megasas_remove_scsi_device(struct scsi_device *sdev)
{
	sdev_printk(KERN_INFO, sdev, "SCSI device is removed\n");
	scsi_remove_device(sdev);
	scsi_device_put(sdev);
}

/**
 * megasas_update_device_list -	Update the PD and LD device list from FW
 *				after an AEN event notification
 * @instance:			Adapter soft state
 * @event_type:			Indicates type of event (PD or LD event)
 *
 * @return:			Success or failure
 *
 * Issue DCMDs to Firmware to update the internal device list in driver.
 * Based on the FW support, driver sends the HOST_DEVICE_LIST or combination
 * of PD_LIST/LD_LIST_QUERY DCMDs to get the device list.
 */
static
int megasas_update_device_list(struct megasas_instance *instance,
			       int event_type)
{
	int dcmd_ret = DCMD_SUCCESS;

	if (instance->enable_fw_dev_list) {
		dcmd_ret = megasas_host_device_list_query(instance, false);
		if (dcmd_ret != DCMD_SUCCESS)
			goto out;
	} else {
		if (event_type & SCAN_PD_CHANNEL) {
			dcmd_ret = megasas_get_pd_list(instance);

			if (dcmd_ret != DCMD_SUCCESS)
				goto out;
		}

		if (event_type & SCAN_VD_CHANNEL) {
			if (!instance->requestorId ||
			    (instance->requestorId &&
			     megasas_get_ld_vf_affiliation(instance, 0))) {
				dcmd_ret = megasas_ld_list_query(instance,
						MR_LD_QUERY_TYPE_EXPOSED_TO_HOST);
				if (dcmd_ret != DCMD_SUCCESS)
					goto out;
			}
		}
	}

out:
	return dcmd_ret;
}

/**
 * megasas_add_remove_devices -	Add/remove devices to SCSI mid-layer
 *				after an AEN event notification
 * @instance:			Adapter soft state
 * @scan_type:			Indicates type of devices (PD/LD) to add
 * @return			void
 */
static
void megasas_add_remove_devices(struct megasas_instance *instance,
				int scan_type)
{
	int i, j;
	u16 pd_index = 0;
	u16 ld_index = 0;
	u16 channel = 0, id = 0;
	struct Scsi_Host *host;
	struct scsi_device *sdev1;
	struct MR_HOST_DEVICE_LIST *targetid_list = NULL;
	struct MR_HOST_DEVICE_LIST_ENTRY *targetid_entry = NULL;

	host = instance->host;

	if (instance->enable_fw_dev_list) {
		targetid_list = instance->host_device_list_buf;
		for (i = 0; i < targetid_list->count; i++) {
			targetid_entry = &targetid_list->host_device_list[i];
			if (targetid_entry->flags.u.bits.is_sys_pd) {
				channel = le16_to_cpu(targetid_entry->target_id) /
						MEGASAS_MAX_DEV_PER_CHANNEL;
				id = le16_to_cpu(targetid_entry->target_id) %
						MEGASAS_MAX_DEV_PER_CHANNEL;
			} else {
				channel = MEGASAS_MAX_PD_CHANNELS +
					  (le16_to_cpu(targetid_entry->target_id) /
					   MEGASAS_MAX_DEV_PER_CHANNEL);
				id = le16_to_cpu(targetid_entry->target_id) %
						MEGASAS_MAX_DEV_PER_CHANNEL;
			}
			sdev1 = scsi_device_lookup(host, channel, id, 0);
			if (!sdev1) {
				scsi_add_device(host, channel, id, 0);
			} else {
				scsi_device_put(sdev1);
			}
		}
	}

	if (scan_type & SCAN_PD_CHANNEL) {
		for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
			for (j = 0; j < MEGASAS_MAX_DEV_PER_CHANNEL; j++) {
				pd_index = i * MEGASAS_MAX_DEV_PER_CHANNEL + j;
				sdev1 = scsi_device_lookup(host, i, j, 0);
				if (instance->pd_list[pd_index].driveState ==
							MR_PD_STATE_SYSTEM) {
					if (!sdev1)
						scsi_add_device(host, i, j, 0);
					else
						scsi_device_put(sdev1);
				} else {
					if (sdev1)
						megasas_remove_scsi_device(sdev1);
				}
			}
		}
	}

	if (scan_type & SCAN_VD_CHANNEL) {
		for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
			for (j = 0; j < MEGASAS_MAX_DEV_PER_CHANNEL; j++) {
				ld_index = (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
				sdev1 = scsi_device_lookup(host,
						MEGASAS_MAX_PD_CHANNELS + i, j, 0);
				if (instance->ld_ids[ld_index] != 0xff) {
					if (!sdev1)
						scsi_add_device(host, MEGASAS_MAX_PD_CHANNELS + i, j, 0);
					else
						scsi_device_put(sdev1);
				} else {
					if (sdev1)
						megasas_remove_scsi_device(sdev1);
				}
			}
		}
	}

}

static void
megasas_aen_polling(struct work_struct *work)
{
	struct megasas_aen_event *ev =
		container_of(work, struct megasas_aen_event, hotplug_work.work);
	struct megasas_instance *instance = ev->instance;
	union megasas_evt_class_locale class_locale;
	int event_type = 0;
	u32 seq_num;
	int error;
	u8  dcmd_ret = DCMD_SUCCESS;

	if (!instance) {
		printk(KERN_ERR "invalid instance!\n");
		kfree(ev);
		return;
	}

	/* Don't run the event workqueue thread if OCR is running */
	mutex_lock(&instance->reset_mutex);

	instance->ev = NULL;
	if (instance->evt_detail) {
		megasas_decode_evt(instance);

		switch (le32_to_cpu(instance->evt_detail->code)) {

		case MR_EVT_PD_INSERTED:
		case MR_EVT_PD_REMOVED:
			event_type = SCAN_PD_CHANNEL;
			break;

		case MR_EVT_LD_OFFLINE:
		case MR_EVT_CFG_CLEARED:
		case MR_EVT_LD_DELETED:
		case MR_EVT_LD_CREATED:
			event_type = SCAN_VD_CHANNEL;
			break;

		case MR_EVT_CTRL_HOST_BUS_SCAN_REQUESTED:
		case MR_EVT_FOREIGN_CFG_IMPORTED:
		case MR_EVT_LD_STATE_CHANGE:
			event_type = SCAN_PD_CHANNEL | SCAN_VD_CHANNEL;
			dev_info(&instance->pdev->dev, "scanning for scsi%d...\n",
				instance->host->host_no);
			break;

		case MR_EVT_CTRL_PROP_CHANGED:
			dcmd_ret = megasas_get_ctrl_info(instance);
			if (dcmd_ret == DCMD_SUCCESS &&
			    instance->snapdump_wait_time) {
				megasas_get_snapdump_properties(instance);
				dev_info(&instance->pdev->dev,
					 "Snap dump wait time\t: %d\n",
					 instance->snapdump_wait_time);
			}
			break;
		default:
			event_type = 0;
			break;
		}
	} else {
		dev_err(&instance->pdev->dev, "invalid evt_detail!\n");
		mutex_unlock(&instance->reset_mutex);
		kfree(ev);
		return;
	}

	if (event_type)
		dcmd_ret = megasas_update_device_list(instance, event_type);

	mutex_unlock(&instance->reset_mutex);

	if (event_type && dcmd_ret == DCMD_SUCCESS)
		megasas_add_remove_devices(instance, event_type);

	if (dcmd_ret == DCMD_SUCCESS)
		seq_num = le32_to_cpu(instance->evt_detail->seq_num) + 1;
	else
		seq_num = instance->last_seq_num;

	/* Register AEN with FW for latest sequence number plus 1 */
	class_locale.members.reserved = 0;
	class_locale.members.locale = MR_EVT_LOCALE_ALL;
	class_locale.members.class = MR_EVT_CLASS_DEBUG;

	if (instance->aen_cmd != NULL) {
		kfree(ev);
		return;
	}

	mutex_lock(&instance->reset_mutex);
	error = megasas_register_aen(instance, seq_num,
					class_locale.word);
	if (error)
		dev_err(&instance->pdev->dev,
			"register aen failed error %x\n", error);

	mutex_unlock(&instance->reset_mutex);
	kfree(ev);
}

/**
 * megasas_init - Driver load entry point
 */
static int __init megasas_init(void)
{
	int rval;

	/*
	 * Booted in kdump kernel, minimize memory footprints by
	 * disabling few features
	 */
	if (reset_devices) {
		msix_vectors = 1;
		rdpq_enable = 0;
		dual_qdepth_disable = 1;
	}

	/*
	 * Announce driver version and other information
	 */
	pr_info("megasas: %s\n", MEGASAS_VERSION);

	spin_lock_init(&poll_aen_lock);

	support_poll_for_event = 2;
	support_device_change = 1;
	support_nvme_encapsulation = true;
	support_pci_lane_margining = true;

	memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info));

	/*
	 * Register character device node
	 */
	rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops);

	if (rval < 0) {
		printk(KERN_DEBUG "megasas: failed to open device node\n");
		return rval;
	}

	megasas_mgmt_majorno = rval;

	megasas_init_debugfs();

	/*
	 * Register ourselves as PCI hotplug module
	 */
	rval = pci_register_driver(&megasas_pci_driver);

	if (rval) {
		printk(KERN_DEBUG "megasas: PCI hotplug registration failed \n");
		goto err_pcidrv;
	}

	if ((event_log_level < MFI_EVT_CLASS_DEBUG) ||
	    (event_log_level > MFI_EVT_CLASS_DEAD)) {
		pr_warn("megaraid_sas: provided event log level is out of range, setting it to default 2(CLASS_CRITICAL), permissible range is: -2 to 4\n");
		event_log_level = MFI_EVT_CLASS_CRITICAL;
	}

	rval = driver_create_file(&megasas_pci_driver.driver,
				  &driver_attr_version);
	if (rval)
		goto err_dcf_attr_ver;

	rval = driver_create_file(&megasas_pci_driver.driver,
				  &driver_attr_release_date);
	if (rval)
		goto err_dcf_rel_date;

	rval = driver_create_file(&megasas_pci_driver.driver,
				&driver_attr_support_poll_for_event);
	if (rval)
		goto err_dcf_support_poll_for_event;

	rval = driver_create_file(&megasas_pci_driver.driver,
				  &driver_attr_dbg_lvl);
	if (rval)
		goto err_dcf_dbg_lvl;
	rval = driver_create_file(&megasas_pci_driver.driver,
				&driver_attr_support_device_change);
	if (rval)
		goto err_dcf_support_device_change;

	rval = driver_create_file(&megasas_pci_driver.driver,
				  &driver_attr_support_nvme_encapsulation);
	if (rval)
		goto err_dcf_support_nvme_encapsulation;

	rval = driver_create_file(&megasas_pci_driver.driver,
				  &driver_attr_support_pci_lane_margining);
	if (rval)
		goto err_dcf_support_pci_lane_margining;

	return rval;

err_dcf_support_pci_lane_margining:
	driver_remove_file(&megasas_pci_driver.driver,
			   &driver_attr_support_nvme_encapsulation);

err_dcf_support_nvme_encapsulation:
	driver_remove_file(&megasas_pci_driver.driver,
			   &driver_attr_support_device_change);

err_dcf_support_device_change:
	driver_remove_file(&megasas_pci_driver.driver,
			   &driver_attr_dbg_lvl);
err_dcf_dbg_lvl:
	driver_remove_file(&megasas_pci_driver.driver,
			&driver_attr_support_poll_for_event);
err_dcf_support_poll_for_event:
	driver_remove_file(&megasas_pci_driver.driver,
			   &driver_attr_release_date);
err_dcf_rel_date:
	driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
err_dcf_attr_ver:
	pci_unregister_driver(&megasas_pci_driver);
err_pcidrv:
	megasas_exit_debugfs();
	unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
	return rval;
}

/**
 * megasas_exit - Driver unload entry point
 */
static void __exit megasas_exit(void)
{
	driver_remove_file(&megasas_pci_driver.driver,
			   &driver_attr_dbg_lvl);
	driver_remove_file(&megasas_pci_driver.driver,
			&driver_attr_support_poll_for_event);
	driver_remove_file(&megasas_pci_driver.driver,
			&driver_attr_support_device_change);
	driver_remove_file(&megasas_pci_driver.driver,
			   &driver_attr_release_date);
	driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
	driver_remove_file(&megasas_pci_driver.driver,
			   &driver_attr_support_nvme_encapsulation);
	driver_remove_file(&megasas_pci_driver.driver,
			   &driver_attr_support_pci_lane_margining);

	pci_unregister_driver(&megasas_pci_driver);
	megasas_exit_debugfs();
	unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
}

module_init(megasas_init);
module_exit(megasas_exit);