summaryrefslogtreecommitdiff
path: root/drivers/ata/sata_mv.c
blob: 53446b997740d5fdd5a7c15ca5d86aebc71900ed (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
// SPDX-License-Identifier: GPL-2.0-only
/*
 * sata_mv.c - Marvell SATA support
 *
 * Copyright 2008-2009: Marvell Corporation, all rights reserved.
 * Copyright 2005: EMC Corporation, all rights reserved.
 * Copyright 2005 Red Hat, Inc.  All rights reserved.
 *
 * Originally written by Brett Russ.
 * Extensive overhaul and enhancement by Mark Lord <mlord@pobox.com>.
 *
 * Please ALWAYS copy linux-ide@vger.kernel.org on emails.
 */

/*
 * sata_mv TODO list:
 *
 * --> Develop a low-power-consumption strategy, and implement it.
 *
 * --> Add sysfs attributes for per-chip / per-HC IRQ coalescing thresholds.
 *
 * --> [Experiment, Marvell value added] Is it possible to use target
 *       mode to cross-connect two Linux boxes with Marvell cards?  If so,
 *       creating LibATA target mode support would be very interesting.
 *
 *       Target mode, for those without docs, is the ability to directly
 *       connect two SATA ports.
 */

/*
 * 80x1-B2 errata PCI#11:
 *
 * Users of the 6041/6081 Rev.B2 chips (current is C0)
 * should be careful to insert those cards only onto PCI-X bus #0,
 * and only in device slots 0..7, not higher.  The chips may not
 * work correctly otherwise  (note: this is a pretty rare condition).
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/dmapool.h>
#include <linux/dma-mapping.h>
#include <linux/device.h>
#include <linux/clk.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/ata_platform.h>
#include <linux/mbus.h>
#include <linux/bitops.h>
#include <linux/gfp.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <linux/libata.h>

#define DRV_NAME	"sata_mv"
#define DRV_VERSION	"1.28"

/*
 * module options
 */

#ifdef CONFIG_PCI
static int msi;
module_param(msi, int, S_IRUGO);
MODULE_PARM_DESC(msi, "Enable use of PCI MSI (0=off, 1=on)");
#endif

static int irq_coalescing_io_count;
module_param(irq_coalescing_io_count, int, S_IRUGO);
MODULE_PARM_DESC(irq_coalescing_io_count,
		 "IRQ coalescing I/O count threshold (0..255)");

static int irq_coalescing_usecs;
module_param(irq_coalescing_usecs, int, S_IRUGO);
MODULE_PARM_DESC(irq_coalescing_usecs,
		 "IRQ coalescing time threshold in usecs");

enum {
	/* BAR's are enumerated in terms of pci_resource_start() terms */
	MV_PRIMARY_BAR		= 0,	/* offset 0x10: memory space */
	MV_IO_BAR		= 2,	/* offset 0x18: IO space */
	MV_MISC_BAR		= 3,	/* offset 0x1c: FLASH, NVRAM, SRAM */

	MV_MAJOR_REG_AREA_SZ	= 0x10000,	/* 64KB */
	MV_MINOR_REG_AREA_SZ	= 0x2000,	/* 8KB */

	/* For use with both IRQ coalescing methods ("all ports" or "per-HC" */
	COAL_CLOCKS_PER_USEC	= 150,		/* for calculating COAL_TIMEs */
	MAX_COAL_TIME_THRESHOLD	= ((1 << 24) - 1), /* internal clocks count */
	MAX_COAL_IO_COUNT	= 255,		/* completed I/O count */

	MV_PCI_REG_BASE		= 0,

	/*
	 * Per-chip ("all ports") interrupt coalescing feature.
	 * This is only for GEN_II / GEN_IIE hardware.
	 *
	 * Coalescing defers the interrupt until either the IO_THRESHOLD
	 * (count of completed I/Os) is met, or the TIME_THRESHOLD is met.
	 */
	COAL_REG_BASE		= 0x18000,
	IRQ_COAL_CAUSE		= (COAL_REG_BASE + 0x08),
	ALL_PORTS_COAL_IRQ	= (1 << 4),	/* all ports irq event */

	IRQ_COAL_IO_THRESHOLD   = (COAL_REG_BASE + 0xcc),
	IRQ_COAL_TIME_THRESHOLD = (COAL_REG_BASE + 0xd0),

	/*
	 * Registers for the (unused here) transaction coalescing feature:
	 */
	TRAN_COAL_CAUSE_LO	= (COAL_REG_BASE + 0x88),
	TRAN_COAL_CAUSE_HI	= (COAL_REG_BASE + 0x8c),

	SATAHC0_REG_BASE	= 0x20000,
	FLASH_CTL		= 0x1046c,
	GPIO_PORT_CTL		= 0x104f0,
	RESET_CFG		= 0x180d8,

	MV_PCI_REG_SZ		= MV_MAJOR_REG_AREA_SZ,
	MV_SATAHC_REG_SZ	= MV_MAJOR_REG_AREA_SZ,
	MV_SATAHC_ARBTR_REG_SZ	= MV_MINOR_REG_AREA_SZ,		/* arbiter */
	MV_PORT_REG_SZ		= MV_MINOR_REG_AREA_SZ,

	MV_MAX_Q_DEPTH		= 32,
	MV_MAX_Q_DEPTH_MASK	= MV_MAX_Q_DEPTH - 1,

	/* CRQB needs alignment on a 1KB boundary. Size == 1KB
	 * CRPB needs alignment on a 256B boundary. Size == 256B
	 * ePRD (SG) entries need alignment on a 16B boundary. Size == 16B
	 */
	MV_CRQB_Q_SZ		= (32 * MV_MAX_Q_DEPTH),
	MV_CRPB_Q_SZ		= (8 * MV_MAX_Q_DEPTH),
	MV_MAX_SG_CT		= 256,
	MV_SG_TBL_SZ		= (16 * MV_MAX_SG_CT),

	/* Determine hc from 0-7 port: hc = port >> MV_PORT_HC_SHIFT */
	MV_PORT_HC_SHIFT	= 2,
	MV_PORTS_PER_HC		= (1 << MV_PORT_HC_SHIFT), /* 4 */
	/* Determine hc port from 0-7 port: hardport = port & MV_PORT_MASK */
	MV_PORT_MASK		= (MV_PORTS_PER_HC - 1),   /* 3 */

	/* Host Flags */
	MV_FLAG_DUAL_HC		= (1 << 30),  /* two SATA Host Controllers */

	MV_COMMON_FLAGS		= ATA_FLAG_SATA | ATA_FLAG_PIO_POLLING,

	MV_GEN_I_FLAGS		= MV_COMMON_FLAGS | ATA_FLAG_NO_ATAPI,

	MV_GEN_II_FLAGS		= MV_COMMON_FLAGS | ATA_FLAG_NCQ |
				  ATA_FLAG_PMP | ATA_FLAG_ACPI_SATA,

	MV_GEN_IIE_FLAGS	= MV_GEN_II_FLAGS | ATA_FLAG_AN,

	CRQB_FLAG_READ		= (1 << 0),
	CRQB_TAG_SHIFT		= 1,
	CRQB_IOID_SHIFT		= 6,	/* CRQB Gen-II/IIE IO Id shift */
	CRQB_PMP_SHIFT		= 12,	/* CRQB Gen-II/IIE PMP shift */
	CRQB_HOSTQ_SHIFT	= 17,	/* CRQB Gen-II/IIE HostQueTag shift */
	CRQB_CMD_ADDR_SHIFT	= 8,
	CRQB_CMD_CS		= (0x2 << 11),
	CRQB_CMD_LAST		= (1 << 15),

	CRPB_FLAG_STATUS_SHIFT	= 8,
	CRPB_IOID_SHIFT_6	= 5,	/* CRPB Gen-II IO Id shift */
	CRPB_IOID_SHIFT_7	= 7,	/* CRPB Gen-IIE IO Id shift */

	EPRD_FLAG_END_OF_TBL	= (1 << 31),

	/* PCI interface registers */

	MV_PCI_COMMAND		= 0xc00,
	MV_PCI_COMMAND_MWRCOM	= (1 << 4),	/* PCI Master Write Combining */
	MV_PCI_COMMAND_MRDTRIG	= (1 << 7),	/* PCI Master Read Trigger */

	PCI_MAIN_CMD_STS	= 0xd30,
	STOP_PCI_MASTER		= (1 << 2),
	PCI_MASTER_EMPTY	= (1 << 3),
	GLOB_SFT_RST		= (1 << 4),

	MV_PCI_MODE		= 0xd00,
	MV_PCI_MODE_MASK	= 0x30,

	MV_PCI_EXP_ROM_BAR_CTL	= 0xd2c,
	MV_PCI_DISC_TIMER	= 0xd04,
	MV_PCI_MSI_TRIGGER	= 0xc38,
	MV_PCI_SERR_MASK	= 0xc28,
	MV_PCI_XBAR_TMOUT	= 0x1d04,
	MV_PCI_ERR_LOW_ADDRESS	= 0x1d40,
	MV_PCI_ERR_HIGH_ADDRESS	= 0x1d44,
	MV_PCI_ERR_ATTRIBUTE	= 0x1d48,
	MV_PCI_ERR_COMMAND	= 0x1d50,

	PCI_IRQ_CAUSE		= 0x1d58,
	PCI_IRQ_MASK		= 0x1d5c,
	PCI_UNMASK_ALL_IRQS	= 0x7fffff,	/* bits 22-0 */

	PCIE_IRQ_CAUSE		= 0x1900,
	PCIE_IRQ_MASK		= 0x1910,
	PCIE_UNMASK_ALL_IRQS	= 0x40a,	/* assorted bits */

	/* Host Controller Main Interrupt Cause/Mask registers (1 per-chip) */
	PCI_HC_MAIN_IRQ_CAUSE	= 0x1d60,
	PCI_HC_MAIN_IRQ_MASK	= 0x1d64,
	SOC_HC_MAIN_IRQ_CAUSE	= 0x20020,
	SOC_HC_MAIN_IRQ_MASK	= 0x20024,
	ERR_IRQ			= (1 << 0),	/* shift by (2 * port #) */
	DONE_IRQ		= (1 << 1),	/* shift by (2 * port #) */
	HC0_IRQ_PEND		= 0x1ff,	/* bits 0-8 = HC0's ports */
	HC_SHIFT		= 9,		/* bits 9-17 = HC1's ports */
	DONE_IRQ_0_3		= 0x000000aa,	/* DONE_IRQ ports 0,1,2,3 */
	DONE_IRQ_4_7		= (DONE_IRQ_0_3 << HC_SHIFT),  /* 4,5,6,7 */
	PCI_ERR			= (1 << 18),
	TRAN_COAL_LO_DONE	= (1 << 19),	/* transaction coalescing */
	TRAN_COAL_HI_DONE	= (1 << 20),	/* transaction coalescing */
	PORTS_0_3_COAL_DONE	= (1 << 8),	/* HC0 IRQ coalescing */
	PORTS_4_7_COAL_DONE	= (1 << 17),	/* HC1 IRQ coalescing */
	ALL_PORTS_COAL_DONE	= (1 << 21),	/* GEN_II(E) IRQ coalescing */
	GPIO_INT		= (1 << 22),
	SELF_INT		= (1 << 23),
	TWSI_INT		= (1 << 24),
	HC_MAIN_RSVD		= (0x7f << 25),	/* bits 31-25 */
	HC_MAIN_RSVD_5		= (0x1fff << 19), /* bits 31-19 */
	HC_MAIN_RSVD_SOC	= (0x3fffffb << 6),     /* bits 31-9, 7-6 */

	/* SATAHC registers */
	HC_CFG			= 0x00,

	HC_IRQ_CAUSE		= 0x14,
	DMA_IRQ			= (1 << 0),	/* shift by port # */
	HC_COAL_IRQ		= (1 << 4),	/* IRQ coalescing */
	DEV_IRQ			= (1 << 8),	/* shift by port # */

	/*
	 * Per-HC (Host-Controller) interrupt coalescing feature.
	 * This is present on all chip generations.
	 *
	 * Coalescing defers the interrupt until either the IO_THRESHOLD
	 * (count of completed I/Os) is met, or the TIME_THRESHOLD is met.
	 */
	HC_IRQ_COAL_IO_THRESHOLD	= 0x000c,
	HC_IRQ_COAL_TIME_THRESHOLD	= 0x0010,

	SOC_LED_CTRL		= 0x2c,
	SOC_LED_CTRL_BLINK	= (1 << 0),	/* Active LED blink */
	SOC_LED_CTRL_ACT_PRESENCE = (1 << 2),	/* Multiplex dev presence */
						/*  with dev activity LED */

	/* Shadow block registers */
	SHD_BLK			= 0x100,
	SHD_CTL_AST		= 0x20,		/* ofs from SHD_BLK */

	/* SATA registers */
	SATA_STATUS		= 0x300,  /* ctrl, err regs follow status */
	SATA_ACTIVE		= 0x350,
	FIS_IRQ_CAUSE		= 0x364,
	FIS_IRQ_CAUSE_AN	= (1 << 9),	/* async notification */

	LTMODE			= 0x30c,	/* requires read-after-write */
	LTMODE_BIT8		= (1 << 8),	/* unknown, but necessary */

	PHY_MODE2		= 0x330,
	PHY_MODE3		= 0x310,

	PHY_MODE4		= 0x314,	/* requires read-after-write */
	PHY_MODE4_CFG_MASK	= 0x00000003,	/* phy internal config field */
	PHY_MODE4_CFG_VALUE	= 0x00000001,	/* phy internal config field */
	PHY_MODE4_RSVD_ZEROS	= 0x5de3fffa,	/* Gen2e always write zeros */
	PHY_MODE4_RSVD_ONES	= 0x00000005,	/* Gen2e always write ones */

	SATA_IFCTL		= 0x344,
	SATA_TESTCTL		= 0x348,
	SATA_IFSTAT		= 0x34c,
	VENDOR_UNIQUE_FIS	= 0x35c,

	FISCFG			= 0x360,
	FISCFG_WAIT_DEV_ERR	= (1 << 8),	/* wait for host on DevErr */
	FISCFG_SINGLE_SYNC	= (1 << 16),	/* SYNC on DMA activation */

	PHY_MODE9_GEN2		= 0x398,
	PHY_MODE9_GEN1		= 0x39c,
	PHYCFG_OFS		= 0x3a0,	/* only in 65n devices */

	MV5_PHY_MODE		= 0x74,
	MV5_LTMODE		= 0x30,
	MV5_PHY_CTL		= 0x0C,
	SATA_IFCFG		= 0x050,
	LP_PHY_CTL		= 0x058,
	LP_PHY_CTL_PIN_PU_PLL   = (1 << 0),
	LP_PHY_CTL_PIN_PU_RX    = (1 << 1),
	LP_PHY_CTL_PIN_PU_TX    = (1 << 2),
	LP_PHY_CTL_GEN_TX_3G    = (1 << 5),
	LP_PHY_CTL_GEN_RX_3G    = (1 << 9),

	MV_M2_PREAMP_MASK	= 0x7e0,

	/* Port registers */
	EDMA_CFG		= 0,
	EDMA_CFG_Q_DEPTH	= 0x1f,		/* max device queue depth */
	EDMA_CFG_NCQ		= (1 << 5),	/* for R/W FPDMA queued */
	EDMA_CFG_NCQ_GO_ON_ERR	= (1 << 14),	/* continue on error */
	EDMA_CFG_RD_BRST_EXT	= (1 << 11),	/* read burst 512B */
	EDMA_CFG_WR_BUFF_LEN	= (1 << 13),	/* write buffer 512B */
	EDMA_CFG_EDMA_FBS	= (1 << 16),	/* EDMA FIS-Based Switching */
	EDMA_CFG_FBS		= (1 << 26),	/* FIS-Based Switching */

	EDMA_ERR_IRQ_CAUSE	= 0x8,
	EDMA_ERR_IRQ_MASK	= 0xc,
	EDMA_ERR_D_PAR		= (1 << 0),	/* UDMA data parity err */
	EDMA_ERR_PRD_PAR	= (1 << 1),	/* UDMA PRD parity err */
	EDMA_ERR_DEV		= (1 << 2),	/* device error */
	EDMA_ERR_DEV_DCON	= (1 << 3),	/* device disconnect */
	EDMA_ERR_DEV_CON	= (1 << 4),	/* device connected */
	EDMA_ERR_SERR		= (1 << 5),	/* SError bits [WBDST] raised */
	EDMA_ERR_SELF_DIS	= (1 << 7),	/* Gen II/IIE self-disable */
	EDMA_ERR_SELF_DIS_5	= (1 << 8),	/* Gen I self-disable */
	EDMA_ERR_BIST_ASYNC	= (1 << 8),	/* BIST FIS or Async Notify */
	EDMA_ERR_TRANS_IRQ_7	= (1 << 8),	/* Gen IIE transprt layer irq */
	EDMA_ERR_CRQB_PAR	= (1 << 9),	/* CRQB parity error */
	EDMA_ERR_CRPB_PAR	= (1 << 10),	/* CRPB parity error */
	EDMA_ERR_INTRL_PAR	= (1 << 11),	/* internal parity error */
	EDMA_ERR_IORDY		= (1 << 12),	/* IORdy timeout */

	EDMA_ERR_LNK_CTRL_RX	= (0xf << 13),	/* link ctrl rx error */
	EDMA_ERR_LNK_CTRL_RX_0	= (1 << 13),	/* transient: CRC err */
	EDMA_ERR_LNK_CTRL_RX_1	= (1 << 14),	/* transient: FIFO err */
	EDMA_ERR_LNK_CTRL_RX_2	= (1 << 15),	/* fatal: caught SYNC */
	EDMA_ERR_LNK_CTRL_RX_3	= (1 << 16),	/* transient: FIS rx err */

	EDMA_ERR_LNK_DATA_RX	= (0xf << 17),	/* link data rx error */

	EDMA_ERR_LNK_CTRL_TX	= (0x1f << 21),	/* link ctrl tx error */
	EDMA_ERR_LNK_CTRL_TX_0	= (1 << 21),	/* transient: CRC err */
	EDMA_ERR_LNK_CTRL_TX_1	= (1 << 22),	/* transient: FIFO err */
	EDMA_ERR_LNK_CTRL_TX_2	= (1 << 23),	/* transient: caught SYNC */
	EDMA_ERR_LNK_CTRL_TX_3	= (1 << 24),	/* transient: caught DMAT */
	EDMA_ERR_LNK_CTRL_TX_4	= (1 << 25),	/* transient: FIS collision */

	EDMA_ERR_LNK_DATA_TX	= (0x1f << 26),	/* link data tx error */

	EDMA_ERR_TRANS_PROTO	= (1 << 31),	/* transport protocol error */
	EDMA_ERR_OVERRUN_5	= (1 << 5),
	EDMA_ERR_UNDERRUN_5	= (1 << 6),

	EDMA_ERR_IRQ_TRANSIENT  = EDMA_ERR_LNK_CTRL_RX_0 |
				  EDMA_ERR_LNK_CTRL_RX_1 |
				  EDMA_ERR_LNK_CTRL_RX_3 |
				  EDMA_ERR_LNK_CTRL_TX,

	EDMA_EH_FREEZE		= EDMA_ERR_D_PAR |
				  EDMA_ERR_PRD_PAR |
				  EDMA_ERR_DEV_DCON |
				  EDMA_ERR_DEV_CON |
				  EDMA_ERR_SERR |
				  EDMA_ERR_SELF_DIS |
				  EDMA_ERR_CRQB_PAR |
				  EDMA_ERR_CRPB_PAR |
				  EDMA_ERR_INTRL_PAR |
				  EDMA_ERR_IORDY |
				  EDMA_ERR_LNK_CTRL_RX_2 |
				  EDMA_ERR_LNK_DATA_RX |
				  EDMA_ERR_LNK_DATA_TX |
				  EDMA_ERR_TRANS_PROTO,

	EDMA_EH_FREEZE_5	= EDMA_ERR_D_PAR |
				  EDMA_ERR_PRD_PAR |
				  EDMA_ERR_DEV_DCON |
				  EDMA_ERR_DEV_CON |
				  EDMA_ERR_OVERRUN_5 |
				  EDMA_ERR_UNDERRUN_5 |
				  EDMA_ERR_SELF_DIS_5 |
				  EDMA_ERR_CRQB_PAR |
				  EDMA_ERR_CRPB_PAR |
				  EDMA_ERR_INTRL_PAR |
				  EDMA_ERR_IORDY,

	EDMA_REQ_Q_BASE_HI	= 0x10,
	EDMA_REQ_Q_IN_PTR	= 0x14,		/* also contains BASE_LO */

	EDMA_REQ_Q_OUT_PTR	= 0x18,
	EDMA_REQ_Q_PTR_SHIFT	= 5,

	EDMA_RSP_Q_BASE_HI	= 0x1c,
	EDMA_RSP_Q_IN_PTR	= 0x20,
	EDMA_RSP_Q_OUT_PTR	= 0x24,		/* also contains BASE_LO */
	EDMA_RSP_Q_PTR_SHIFT	= 3,

	EDMA_CMD		= 0x28,		/* EDMA command register */
	EDMA_EN			= (1 << 0),	/* enable EDMA */
	EDMA_DS			= (1 << 1),	/* disable EDMA; self-negated */
	EDMA_RESET		= (1 << 2),	/* reset eng/trans/link/phy */

	EDMA_STATUS		= 0x30,		/* EDMA engine status */
	EDMA_STATUS_CACHE_EMPTY	= (1 << 6),	/* GenIIe command cache empty */
	EDMA_STATUS_IDLE	= (1 << 7),	/* GenIIe EDMA enabled/idle */

	EDMA_IORDY_TMOUT	= 0x34,
	EDMA_ARB_CFG		= 0x38,

	EDMA_HALTCOND		= 0x60,		/* GenIIe halt conditions */
	EDMA_UNKNOWN_RSVD	= 0x6C,		/* GenIIe unknown/reserved */

	BMDMA_CMD		= 0x224,	/* bmdma command register */
	BMDMA_STATUS		= 0x228,	/* bmdma status register */
	BMDMA_PRD_LOW		= 0x22c,	/* bmdma PRD addr 31:0 */
	BMDMA_PRD_HIGH		= 0x230,	/* bmdma PRD addr 63:32 */

	/* Host private flags (hp_flags) */
	MV_HP_FLAG_MSI		= (1 << 0),
	MV_HP_ERRATA_50XXB0	= (1 << 1),
	MV_HP_ERRATA_50XXB2	= (1 << 2),
	MV_HP_ERRATA_60X1B2	= (1 << 3),
	MV_HP_ERRATA_60X1C0	= (1 << 4),
	MV_HP_GEN_I		= (1 << 6),	/* Generation I: 50xx */
	MV_HP_GEN_II		= (1 << 7),	/* Generation II: 60xx */
	MV_HP_GEN_IIE		= (1 << 8),	/* Generation IIE: 6042/7042 */
	MV_HP_PCIE		= (1 << 9),	/* PCIe bus/regs: 7042 */
	MV_HP_CUT_THROUGH	= (1 << 10),	/* can use EDMA cut-through */
	MV_HP_FLAG_SOC		= (1 << 11),	/* SystemOnChip, no PCI */
	MV_HP_QUIRK_LED_BLINK_EN = (1 << 12),	/* is led blinking enabled? */
	MV_HP_FIX_LP_PHY_CTL	= (1 << 13),	/* fix speed in LP_PHY_CTL ? */

	/* Port private flags (pp_flags) */
	MV_PP_FLAG_EDMA_EN	= (1 << 0),	/* is EDMA engine enabled? */
	MV_PP_FLAG_NCQ_EN	= (1 << 1),	/* is EDMA set up for NCQ? */
	MV_PP_FLAG_FBS_EN	= (1 << 2),	/* is EDMA set up for FBS? */
	MV_PP_FLAG_DELAYED_EH	= (1 << 3),	/* delayed dev err handling */
	MV_PP_FLAG_FAKE_ATA_BUSY = (1 << 4),	/* ignore initial ATA_DRDY */
};

#define IS_GEN_I(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_I)
#define IS_GEN_II(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_II)
#define IS_GEN_IIE(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_IIE)
#define IS_PCIE(hpriv) ((hpriv)->hp_flags & MV_HP_PCIE)
#define IS_SOC(hpriv) ((hpriv)->hp_flags & MV_HP_FLAG_SOC)

#define WINDOW_CTRL(i)		(0x20030 + ((i) << 4))
#define WINDOW_BASE(i)		(0x20034 + ((i) << 4))

enum {
	/* DMA boundary 0xffff is required by the s/g splitting
	 * we need on /length/ in mv_fill-sg().
	 */
	MV_DMA_BOUNDARY		= 0xffffU,

	/* mask of register bits containing lower 32 bits
	 * of EDMA request queue DMA address
	 */
	EDMA_REQ_Q_BASE_LO_MASK	= 0xfffffc00U,

	/* ditto, for response queue */
	EDMA_RSP_Q_BASE_LO_MASK	= 0xffffff00U,
};

enum chip_type {
	chip_504x,
	chip_508x,
	chip_5080,
	chip_604x,
	chip_608x,
	chip_6042,
	chip_7042,
	chip_soc,
};

/* Command ReQuest Block: 32B */
struct mv_crqb {
	__le32			sg_addr;
	__le32			sg_addr_hi;
	__le16			ctrl_flags;
	__le16			ata_cmd[11];
};

struct mv_crqb_iie {
	__le32			addr;
	__le32			addr_hi;
	__le32			flags;
	__le32			len;
	__le32			ata_cmd[4];
};

/* Command ResPonse Block: 8B */
struct mv_crpb {
	__le16			id;
	__le16			flags;
	__le32			tmstmp;
};

/* EDMA Physical Region Descriptor (ePRD); A.K.A. SG */
struct mv_sg {
	__le32			addr;
	__le32			flags_size;
	__le32			addr_hi;
	__le32			reserved;
};

/*
 * We keep a local cache of a few frequently accessed port
 * registers here, to avoid having to read them (very slow)
 * when switching between EDMA and non-EDMA modes.
 */
struct mv_cached_regs {
	u32			fiscfg;
	u32			ltmode;
	u32			haltcond;
	u32			unknown_rsvd;
};

struct mv_port_priv {
	struct mv_crqb		*crqb;
	dma_addr_t		crqb_dma;
	struct mv_crpb		*crpb;
	dma_addr_t		crpb_dma;
	struct mv_sg		*sg_tbl[MV_MAX_Q_DEPTH];
	dma_addr_t		sg_tbl_dma[MV_MAX_Q_DEPTH];

	unsigned int		req_idx;
	unsigned int		resp_idx;

	u32			pp_flags;
	struct mv_cached_regs	cached;
	unsigned int		delayed_eh_pmp_map;
};

struct mv_port_signal {
	u32			amps;
	u32			pre;
};

struct mv_host_priv {
	u32			hp_flags;
	unsigned int 		board_idx;
	u32			main_irq_mask;
	struct mv_port_signal	signal[8];
	const struct mv_hw_ops	*ops;
	int			n_ports;
	void __iomem		*base;
	void __iomem		*main_irq_cause_addr;
	void __iomem		*main_irq_mask_addr;
	u32			irq_cause_offset;
	u32			irq_mask_offset;
	u32			unmask_all_irqs;

	/*
	 * Needed on some devices that require their clocks to be enabled.
	 * These are optional: if the platform device does not have any
	 * clocks, they won't be used.  Also, if the underlying hardware
	 * does not support the common clock framework (CONFIG_HAVE_CLK=n),
	 * all the clock operations become no-ops (see clk.h).
	 */
	struct clk		*clk;
	struct clk              **port_clks;
	/*
	 * Some devices have a SATA PHY which can be enabled/disabled
	 * in order to save power. These are optional: if the platform
	 * devices does not have any phy, they won't be used.
	 */
	struct phy		**port_phys;
	/*
	 * These consistent DMA memory pools give us guaranteed
	 * alignment for hardware-accessed data structures,
	 * and less memory waste in accomplishing the alignment.
	 */
	struct dma_pool		*crqb_pool;
	struct dma_pool		*crpb_pool;
	struct dma_pool		*sg_tbl_pool;
};

struct mv_hw_ops {
	void (*phy_errata)(struct mv_host_priv *hpriv, void __iomem *mmio,
			   unsigned int port);
	void (*enable_leds)(struct mv_host_priv *hpriv, void __iomem *mmio);
	void (*read_preamp)(struct mv_host_priv *hpriv, int idx,
			   void __iomem *mmio);
	int (*reset_hc)(struct ata_host *host, void __iomem *mmio,
			unsigned int n_hc);
	void (*reset_flash)(struct mv_host_priv *hpriv, void __iomem *mmio);
	void (*reset_bus)(struct ata_host *host, void __iomem *mmio);
};

static int mv_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val);
static int mv_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val);
static int mv5_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val);
static int mv5_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val);
static int mv_port_start(struct ata_port *ap);
static void mv_port_stop(struct ata_port *ap);
static int mv_qc_defer(struct ata_queued_cmd *qc);
static enum ata_completion_errors mv_qc_prep(struct ata_queued_cmd *qc);
static enum ata_completion_errors mv_qc_prep_iie(struct ata_queued_cmd *qc);
static unsigned int mv_qc_issue(struct ata_queued_cmd *qc);
static int mv_hardreset(struct ata_link *link, unsigned int *class,
			unsigned long deadline);
static void mv_eh_freeze(struct ata_port *ap);
static void mv_eh_thaw(struct ata_port *ap);
static void mv6_dev_config(struct ata_device *dev);

static void mv5_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
			   unsigned int port);
static void mv5_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio);
static void mv5_read_preamp(struct mv_host_priv *hpriv, int idx,
			   void __iomem *mmio);
static int mv5_reset_hc(struct ata_host *host, void __iomem *mmio,
			unsigned int n_hc);
static void mv5_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio);
static void mv5_reset_bus(struct ata_host *host, void __iomem *mmio);

static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
			   unsigned int port);
static void mv6_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio);
static void mv6_read_preamp(struct mv_host_priv *hpriv, int idx,
			   void __iomem *mmio);
static int mv6_reset_hc(struct ata_host *host, void __iomem *mmio,
			unsigned int n_hc);
static void mv6_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio);
static void mv_soc_enable_leds(struct mv_host_priv *hpriv,
				      void __iomem *mmio);
static void mv_soc_read_preamp(struct mv_host_priv *hpriv, int idx,
				      void __iomem *mmio);
static int mv_soc_reset_hc(struct ata_host *host,
				  void __iomem *mmio, unsigned int n_hc);
static void mv_soc_reset_flash(struct mv_host_priv *hpriv,
				      void __iomem *mmio);
static void mv_soc_reset_bus(struct ata_host *host, void __iomem *mmio);
static void mv_soc_65n_phy_errata(struct mv_host_priv *hpriv,
				  void __iomem *mmio, unsigned int port);
static void mv_reset_pci_bus(struct ata_host *host, void __iomem *mmio);
static void mv_reset_channel(struct mv_host_priv *hpriv, void __iomem *mmio,
			     unsigned int port_no);
static int mv_stop_edma(struct ata_port *ap);
static int mv_stop_edma_engine(void __iomem *port_mmio);
static void mv_edma_cfg(struct ata_port *ap, int want_ncq, int want_edma);

static void mv_pmp_select(struct ata_port *ap, int pmp);
static int mv_pmp_hardreset(struct ata_link *link, unsigned int *class,
				unsigned long deadline);
static int  mv_softreset(struct ata_link *link, unsigned int *class,
				unsigned long deadline);
static void mv_pmp_error_handler(struct ata_port *ap);
static void mv_process_crpb_entries(struct ata_port *ap,
					struct mv_port_priv *pp);

static void mv_sff_irq_clear(struct ata_port *ap);
static int mv_check_atapi_dma(struct ata_queued_cmd *qc);
static void mv_bmdma_setup(struct ata_queued_cmd *qc);
static void mv_bmdma_start(struct ata_queued_cmd *qc);
static void mv_bmdma_stop(struct ata_queued_cmd *qc);
static u8   mv_bmdma_status(struct ata_port *ap);
static u8 mv_sff_check_status(struct ata_port *ap);

/* .sg_tablesize is (MV_MAX_SG_CT / 2) in the structures below
 * because we have to allow room for worst case splitting of
 * PRDs for 64K boundaries in mv_fill_sg().
 */
#ifdef CONFIG_PCI
static struct scsi_host_template mv5_sht = {
	ATA_BASE_SHT(DRV_NAME),
	.sg_tablesize		= MV_MAX_SG_CT / 2,
	.dma_boundary		= MV_DMA_BOUNDARY,
};
#endif
static struct scsi_host_template mv6_sht = {
	__ATA_BASE_SHT(DRV_NAME),
	.can_queue		= MV_MAX_Q_DEPTH - 1,
	.sg_tablesize		= MV_MAX_SG_CT / 2,
	.dma_boundary		= MV_DMA_BOUNDARY,
	.sdev_groups		= ata_ncq_sdev_groups,
	.change_queue_depth	= ata_scsi_change_queue_depth,
	.tag_alloc_policy	= BLK_TAG_ALLOC_RR,
	.slave_configure	= ata_scsi_slave_config
};

static struct ata_port_operations mv5_ops = {
	.inherits		= &ata_sff_port_ops,

	.lost_interrupt		= ATA_OP_NULL,

	.qc_defer		= mv_qc_defer,
	.qc_prep		= mv_qc_prep,
	.qc_issue		= mv_qc_issue,

	.freeze			= mv_eh_freeze,
	.thaw			= mv_eh_thaw,
	.hardreset		= mv_hardreset,

	.scr_read		= mv5_scr_read,
	.scr_write		= mv5_scr_write,

	.port_start		= mv_port_start,
	.port_stop		= mv_port_stop,
};

static struct ata_port_operations mv6_ops = {
	.inherits		= &ata_bmdma_port_ops,

	.lost_interrupt		= ATA_OP_NULL,

	.qc_defer		= mv_qc_defer,
	.qc_prep		= mv_qc_prep,
	.qc_issue		= mv_qc_issue,

	.dev_config             = mv6_dev_config,

	.freeze			= mv_eh_freeze,
	.thaw			= mv_eh_thaw,
	.hardreset		= mv_hardreset,
	.softreset		= mv_softreset,
	.pmp_hardreset		= mv_pmp_hardreset,
	.pmp_softreset		= mv_softreset,
	.error_handler		= mv_pmp_error_handler,

	.scr_read		= mv_scr_read,
	.scr_write		= mv_scr_write,

	.sff_check_status	= mv_sff_check_status,
	.sff_irq_clear		= mv_sff_irq_clear,
	.check_atapi_dma	= mv_check_atapi_dma,
	.bmdma_setup		= mv_bmdma_setup,
	.bmdma_start		= mv_bmdma_start,
	.bmdma_stop		= mv_bmdma_stop,
	.bmdma_status		= mv_bmdma_status,

	.port_start		= mv_port_start,
	.port_stop		= mv_port_stop,
};

static struct ata_port_operations mv_iie_ops = {
	.inherits		= &mv6_ops,
	.dev_config		= ATA_OP_NULL,
	.qc_prep		= mv_qc_prep_iie,
};

static const struct ata_port_info mv_port_info[] = {
	{  /* chip_504x */
		.flags		= MV_GEN_I_FLAGS,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &mv5_ops,
	},
	{  /* chip_508x */
		.flags		= MV_GEN_I_FLAGS | MV_FLAG_DUAL_HC,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &mv5_ops,
	},
	{  /* chip_5080 */
		.flags		= MV_GEN_I_FLAGS | MV_FLAG_DUAL_HC,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &mv5_ops,
	},
	{  /* chip_604x */
		.flags		= MV_GEN_II_FLAGS,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &mv6_ops,
	},
	{  /* chip_608x */
		.flags		= MV_GEN_II_FLAGS | MV_FLAG_DUAL_HC,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &mv6_ops,
	},
	{  /* chip_6042 */
		.flags		= MV_GEN_IIE_FLAGS,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &mv_iie_ops,
	},
	{  /* chip_7042 */
		.flags		= MV_GEN_IIE_FLAGS,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &mv_iie_ops,
	},
	{  /* chip_soc */
		.flags		= MV_GEN_IIE_FLAGS,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &mv_iie_ops,
	},
};

static const struct pci_device_id mv_pci_tbl[] = {
	{ PCI_VDEVICE(MARVELL, 0x5040), chip_504x },
	{ PCI_VDEVICE(MARVELL, 0x5041), chip_504x },
	{ PCI_VDEVICE(MARVELL, 0x5080), chip_5080 },
	{ PCI_VDEVICE(MARVELL, 0x5081), chip_508x },
	/* RocketRAID 1720/174x have different identifiers */
	{ PCI_VDEVICE(TTI, 0x1720), chip_6042 },
	{ PCI_VDEVICE(TTI, 0x1740), chip_6042 },
	{ PCI_VDEVICE(TTI, 0x1742), chip_6042 },

	{ PCI_VDEVICE(MARVELL, 0x6040), chip_604x },
	{ PCI_VDEVICE(MARVELL, 0x6041), chip_604x },
	{ PCI_VDEVICE(MARVELL, 0x6042), chip_6042 },
	{ PCI_VDEVICE(MARVELL, 0x6080), chip_608x },
	{ PCI_VDEVICE(MARVELL, 0x6081), chip_608x },

	{ PCI_VDEVICE(ADAPTEC2, 0x0241), chip_604x },

	/* Adaptec 1430SA */
	{ PCI_VDEVICE(ADAPTEC2, 0x0243), chip_7042 },

	/* Marvell 7042 support */
	{ PCI_VDEVICE(MARVELL, 0x7042), chip_7042 },

	/* Highpoint RocketRAID PCIe series */
	{ PCI_VDEVICE(TTI, 0x2300), chip_7042 },
	{ PCI_VDEVICE(TTI, 0x2310), chip_7042 },

	{ }			/* terminate list */
};

static const struct mv_hw_ops mv5xxx_ops = {
	.phy_errata		= mv5_phy_errata,
	.enable_leds		= mv5_enable_leds,
	.read_preamp		= mv5_read_preamp,
	.reset_hc		= mv5_reset_hc,
	.reset_flash		= mv5_reset_flash,
	.reset_bus		= mv5_reset_bus,
};

static const struct mv_hw_ops mv6xxx_ops = {
	.phy_errata		= mv6_phy_errata,
	.enable_leds		= mv6_enable_leds,
	.read_preamp		= mv6_read_preamp,
	.reset_hc		= mv6_reset_hc,
	.reset_flash		= mv6_reset_flash,
	.reset_bus		= mv_reset_pci_bus,
};

static const struct mv_hw_ops mv_soc_ops = {
	.phy_errata		= mv6_phy_errata,
	.enable_leds		= mv_soc_enable_leds,
	.read_preamp		= mv_soc_read_preamp,
	.reset_hc		= mv_soc_reset_hc,
	.reset_flash		= mv_soc_reset_flash,
	.reset_bus		= mv_soc_reset_bus,
};

static const struct mv_hw_ops mv_soc_65n_ops = {
	.phy_errata		= mv_soc_65n_phy_errata,
	.enable_leds		= mv_soc_enable_leds,
	.reset_hc		= mv_soc_reset_hc,
	.reset_flash		= mv_soc_reset_flash,
	.reset_bus		= mv_soc_reset_bus,
};

/*
 * Functions
 */

static inline void writelfl(unsigned long data, void __iomem *addr)
{
	writel(data, addr);
	(void) readl(addr);	/* flush to avoid PCI posted write */
}

static inline unsigned int mv_hc_from_port(unsigned int port)
{
	return port >> MV_PORT_HC_SHIFT;
}

static inline unsigned int mv_hardport_from_port(unsigned int port)
{
	return port & MV_PORT_MASK;
}

/*
 * Consolidate some rather tricky bit shift calculations.
 * This is hot-path stuff, so not a function.
 * Simple code, with two return values, so macro rather than inline.
 *
 * port is the sole input, in range 0..7.
 * shift is one output, for use with main_irq_cause / main_irq_mask registers.
 * hardport is the other output, in range 0..3.
 *
 * Note that port and hardport may be the same variable in some cases.
 */
#define MV_PORT_TO_SHIFT_AND_HARDPORT(port, shift, hardport)	\
{								\
	shift    = mv_hc_from_port(port) * HC_SHIFT;		\
	hardport = mv_hardport_from_port(port);			\
	shift   += hardport * 2;				\
}

static inline void __iomem *mv_hc_base(void __iomem *base, unsigned int hc)
{
	return (base + SATAHC0_REG_BASE + (hc * MV_SATAHC_REG_SZ));
}

static inline void __iomem *mv_hc_base_from_port(void __iomem *base,
						 unsigned int port)
{
	return mv_hc_base(base, mv_hc_from_port(port));
}

static inline void __iomem *mv_port_base(void __iomem *base, unsigned int port)
{
	return  mv_hc_base_from_port(base, port) +
		MV_SATAHC_ARBTR_REG_SZ +
		(mv_hardport_from_port(port) * MV_PORT_REG_SZ);
}

static void __iomem *mv5_phy_base(void __iomem *mmio, unsigned int port)
{
	void __iomem *hc_mmio = mv_hc_base_from_port(mmio, port);
	unsigned long ofs = (mv_hardport_from_port(port) + 1) * 0x100UL;

	return hc_mmio + ofs;
}

static inline void __iomem *mv_host_base(struct ata_host *host)
{
	struct mv_host_priv *hpriv = host->private_data;
	return hpriv->base;
}

static inline void __iomem *mv_ap_base(struct ata_port *ap)
{
	return mv_port_base(mv_host_base(ap->host), ap->port_no);
}

static inline int mv_get_hc_count(unsigned long port_flags)
{
	return ((port_flags & MV_FLAG_DUAL_HC) ? 2 : 1);
}

/**
 *      mv_save_cached_regs - (re-)initialize cached port registers
 *      @ap: the port whose registers we are caching
 *
 *	Initialize the local cache of port registers,
 *	so that reading them over and over again can
 *	be avoided on the hotter paths of this driver.
 *	This saves a few microseconds each time we switch
 *	to/from EDMA mode to perform (eg.) a drive cache flush.
 */
static void mv_save_cached_regs(struct ata_port *ap)
{
	void __iomem *port_mmio = mv_ap_base(ap);
	struct mv_port_priv *pp = ap->private_data;

	pp->cached.fiscfg = readl(port_mmio + FISCFG);
	pp->cached.ltmode = readl(port_mmio + LTMODE);
	pp->cached.haltcond = readl(port_mmio + EDMA_HALTCOND);
	pp->cached.unknown_rsvd = readl(port_mmio + EDMA_UNKNOWN_RSVD);
}

/**
 *      mv_write_cached_reg - write to a cached port register
 *      @addr: hardware address of the register
 *      @old: pointer to cached value of the register
 *      @new: new value for the register
 *
 *	Write a new value to a cached register,
 *	but only if the value is different from before.
 */
static inline void mv_write_cached_reg(void __iomem *addr, u32 *old, u32 new)
{
	if (new != *old) {
		unsigned long laddr;
		*old = new;
		/*
		 * Workaround for 88SX60x1-B2 FEr SATA#13:
		 * Read-after-write is needed to prevent generating 64-bit
		 * write cycles on the PCI bus for SATA interface registers
		 * at offsets ending in 0x4 or 0xc.
		 *
		 * Looks like a lot of fuss, but it avoids an unnecessary
		 * +1 usec read-after-write delay for unaffected registers.
		 */
		laddr = (unsigned long)addr & 0xffff;
		if (laddr >= 0x300 && laddr <= 0x33c) {
			laddr &= 0x000f;
			if (laddr == 0x4 || laddr == 0xc) {
				writelfl(new, addr); /* read after write */
				return;
			}
		}
		writel(new, addr); /* unaffected by the errata */
	}
}

static void mv_set_edma_ptrs(void __iomem *port_mmio,
			     struct mv_host_priv *hpriv,
			     struct mv_port_priv *pp)
{
	u32 index;

	/*
	 * initialize request queue
	 */
	pp->req_idx &= MV_MAX_Q_DEPTH_MASK;	/* paranoia */
	index = pp->req_idx << EDMA_REQ_Q_PTR_SHIFT;

	WARN_ON(pp->crqb_dma & 0x3ff);
	writel((pp->crqb_dma >> 16) >> 16, port_mmio + EDMA_REQ_Q_BASE_HI);
	writelfl((pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK) | index,
		 port_mmio + EDMA_REQ_Q_IN_PTR);
	writelfl(index, port_mmio + EDMA_REQ_Q_OUT_PTR);

	/*
	 * initialize response queue
	 */
	pp->resp_idx &= MV_MAX_Q_DEPTH_MASK;	/* paranoia */
	index = pp->resp_idx << EDMA_RSP_Q_PTR_SHIFT;

	WARN_ON(pp->crpb_dma & 0xff);
	writel((pp->crpb_dma >> 16) >> 16, port_mmio + EDMA_RSP_Q_BASE_HI);
	writelfl(index, port_mmio + EDMA_RSP_Q_IN_PTR);
	writelfl((pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK) | index,
		 port_mmio + EDMA_RSP_Q_OUT_PTR);
}

static void mv_write_main_irq_mask(u32 mask, struct mv_host_priv *hpriv)
{
	/*
	 * When writing to the main_irq_mask in hardware,
	 * we must ensure exclusivity between the interrupt coalescing bits
	 * and the corresponding individual port DONE_IRQ bits.
	 *
	 * Note that this register is really an "IRQ enable" register,
	 * not an "IRQ mask" register as Marvell's naming might suggest.
	 */
	if (mask & (ALL_PORTS_COAL_DONE | PORTS_0_3_COAL_DONE))
		mask &= ~DONE_IRQ_0_3;
	if (mask & (ALL_PORTS_COAL_DONE | PORTS_4_7_COAL_DONE))
		mask &= ~DONE_IRQ_4_7;
	writelfl(mask, hpriv->main_irq_mask_addr);
}

static void mv_set_main_irq_mask(struct ata_host *host,
				 u32 disable_bits, u32 enable_bits)
{
	struct mv_host_priv *hpriv = host->private_data;
	u32 old_mask, new_mask;

	old_mask = hpriv->main_irq_mask;
	new_mask = (old_mask & ~disable_bits) | enable_bits;
	if (new_mask != old_mask) {
		hpriv->main_irq_mask = new_mask;
		mv_write_main_irq_mask(new_mask, hpriv);
	}
}

static void mv_enable_port_irqs(struct ata_port *ap,
				     unsigned int port_bits)
{
	unsigned int shift, hardport, port = ap->port_no;
	u32 disable_bits, enable_bits;

	MV_PORT_TO_SHIFT_AND_HARDPORT(port, shift, hardport);

	disable_bits = (DONE_IRQ | ERR_IRQ) << shift;
	enable_bits  = port_bits << shift;
	mv_set_main_irq_mask(ap->host, disable_bits, enable_bits);
}

static void mv_clear_and_enable_port_irqs(struct ata_port *ap,
					  void __iomem *port_mmio,
					  unsigned int port_irqs)
{
	struct mv_host_priv *hpriv = ap->host->private_data;
	int hardport = mv_hardport_from_port(ap->port_no);
	void __iomem *hc_mmio = mv_hc_base_from_port(
				mv_host_base(ap->host), ap->port_no);
	u32 hc_irq_cause;

	/* clear EDMA event indicators, if any */
	writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE);

	/* clear pending irq events */
	hc_irq_cause = ~((DEV_IRQ | DMA_IRQ) << hardport);
	writelfl(hc_irq_cause, hc_mmio + HC_IRQ_CAUSE);

	/* clear FIS IRQ Cause */
	if (IS_GEN_IIE(hpriv))
		writelfl(0, port_mmio + FIS_IRQ_CAUSE);

	mv_enable_port_irqs(ap, port_irqs);
}

static void mv_set_irq_coalescing(struct ata_host *host,
				  unsigned int count, unsigned int usecs)
{
	struct mv_host_priv *hpriv = host->private_data;
	void __iomem *mmio = hpriv->base, *hc_mmio;
	u32 coal_enable = 0;
	unsigned long flags;
	unsigned int clks, is_dual_hc = hpriv->n_ports > MV_PORTS_PER_HC;
	const u32 coal_disable = PORTS_0_3_COAL_DONE | PORTS_4_7_COAL_DONE |
							ALL_PORTS_COAL_DONE;

	/* Disable IRQ coalescing if either threshold is zero */
	if (!usecs || !count) {
		clks = count = 0;
	} else {
		/* Respect maximum limits of the hardware */
		clks = usecs * COAL_CLOCKS_PER_USEC;
		if (clks > MAX_COAL_TIME_THRESHOLD)
			clks = MAX_COAL_TIME_THRESHOLD;
		if (count > MAX_COAL_IO_COUNT)
			count = MAX_COAL_IO_COUNT;
	}

	spin_lock_irqsave(&host->lock, flags);
	mv_set_main_irq_mask(host, coal_disable, 0);

	if (is_dual_hc && !IS_GEN_I(hpriv)) {
		/*
		 * GEN_II/GEN_IIE with dual host controllers:
		 * one set of global thresholds for the entire chip.
		 */
		writel(clks,  mmio + IRQ_COAL_TIME_THRESHOLD);
		writel(count, mmio + IRQ_COAL_IO_THRESHOLD);
		/* clear leftover coal IRQ bit */
		writel(~ALL_PORTS_COAL_IRQ, mmio + IRQ_COAL_CAUSE);
		if (count)
			coal_enable = ALL_PORTS_COAL_DONE;
		clks = count = 0; /* force clearing of regular regs below */
	}

	/*
	 * All chips: independent thresholds for each HC on the chip.
	 */
	hc_mmio = mv_hc_base_from_port(mmio, 0);
	writel(clks,  hc_mmio + HC_IRQ_COAL_TIME_THRESHOLD);
	writel(count, hc_mmio + HC_IRQ_COAL_IO_THRESHOLD);
	writel(~HC_COAL_IRQ, hc_mmio + HC_IRQ_CAUSE);
	if (count)
		coal_enable |= PORTS_0_3_COAL_DONE;
	if (is_dual_hc) {
		hc_mmio = mv_hc_base_from_port(mmio, MV_PORTS_PER_HC);
		writel(clks,  hc_mmio + HC_IRQ_COAL_TIME_THRESHOLD);
		writel(count, hc_mmio + HC_IRQ_COAL_IO_THRESHOLD);
		writel(~HC_COAL_IRQ, hc_mmio + HC_IRQ_CAUSE);
		if (count)
			coal_enable |= PORTS_4_7_COAL_DONE;
	}

	mv_set_main_irq_mask(host, 0, coal_enable);
	spin_unlock_irqrestore(&host->lock, flags);
}

/*
 *      mv_start_edma - Enable eDMA engine
 *      @pp: port private data
 *
 *      Verify the local cache of the eDMA state is accurate with a
 *      WARN_ON.
 *
 *      LOCKING:
 *      Inherited from caller.
 */
static void mv_start_edma(struct ata_port *ap, void __iomem *port_mmio,
			 struct mv_port_priv *pp, u8 protocol)
{
	int want_ncq = (protocol == ATA_PROT_NCQ);

	if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) {
		int using_ncq = ((pp->pp_flags & MV_PP_FLAG_NCQ_EN) != 0);
		if (want_ncq != using_ncq)
			mv_stop_edma(ap);
	}
	if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN)) {
		struct mv_host_priv *hpriv = ap->host->private_data;

		mv_edma_cfg(ap, want_ncq, 1);

		mv_set_edma_ptrs(port_mmio, hpriv, pp);
		mv_clear_and_enable_port_irqs(ap, port_mmio, DONE_IRQ|ERR_IRQ);

		writelfl(EDMA_EN, port_mmio + EDMA_CMD);
		pp->pp_flags |= MV_PP_FLAG_EDMA_EN;
	}
}

static void mv_wait_for_edma_empty_idle(struct ata_port *ap)
{
	void __iomem *port_mmio = mv_ap_base(ap);
	const u32 empty_idle = (EDMA_STATUS_CACHE_EMPTY | EDMA_STATUS_IDLE);
	const int per_loop = 5, timeout = (15 * 1000 / per_loop);
	int i;

	/*
	 * Wait for the EDMA engine to finish transactions in progress.
	 * No idea what a good "timeout" value might be, but measurements
	 * indicate that it often requires hundreds of microseconds
	 * with two drives in-use.  So we use the 15msec value above
	 * as a rough guess at what even more drives might require.
	 */
	for (i = 0; i < timeout; ++i) {
		u32 edma_stat = readl(port_mmio + EDMA_STATUS);
		if ((edma_stat & empty_idle) == empty_idle)
			break;
		udelay(per_loop);
	}
	/* ata_port_info(ap, "%s: %u+ usecs\n", __func__, i); */
}

/**
 *      mv_stop_edma_engine - Disable eDMA engine
 *      @port_mmio: io base address
 *
 *      LOCKING:
 *      Inherited from caller.
 */
static int mv_stop_edma_engine(void __iomem *port_mmio)
{
	int i;

	/* Disable eDMA.  The disable bit auto clears. */
	writelfl(EDMA_DS, port_mmio + EDMA_CMD);

	/* Wait for the chip to confirm eDMA is off. */
	for (i = 10000; i > 0; i--) {
		u32 reg = readl(port_mmio + EDMA_CMD);
		if (!(reg & EDMA_EN))
			return 0;
		udelay(10);
	}
	return -EIO;
}

static int mv_stop_edma(struct ata_port *ap)
{
	void __iomem *port_mmio = mv_ap_base(ap);
	struct mv_port_priv *pp = ap->private_data;
	int err = 0;

	if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN))
		return 0;
	pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
	mv_wait_for_edma_empty_idle(ap);
	if (mv_stop_edma_engine(port_mmio)) {
		ata_port_err(ap, "Unable to stop eDMA\n");
		err = -EIO;
	}
	mv_edma_cfg(ap, 0, 0);
	return err;
}

static void mv_dump_mem(struct device *dev, void __iomem *start, unsigned bytes)
{
	int b, w, o;
	unsigned char linebuf[38];

	for (b = 0; b < bytes; ) {
		for (w = 0, o = 0; b < bytes && w < 4; w++) {
			o += snprintf(linebuf + o, sizeof(linebuf) - o,
				      "%08x ", readl(start + b));
			b += sizeof(u32);
		}
		dev_dbg(dev, "%s: %p: %s\n",
			__func__, start + b, linebuf);
	}
}

static void mv_dump_pci_cfg(struct pci_dev *pdev, unsigned bytes)
{
	int b, w, o;
	u32 dw = 0;
	unsigned char linebuf[38];

	for (b = 0; b < bytes; ) {
		for (w = 0, o = 0; b < bytes && w < 4; w++) {
			(void) pci_read_config_dword(pdev, b, &dw);
			o += snprintf(linebuf + o, sizeof(linebuf) - o,
				      "%08x ", dw);
			b += sizeof(u32);
		}
		dev_dbg(&pdev->dev, "%s: %02x: %s\n",
			__func__, b, linebuf);
	}
}

static void mv_dump_all_regs(void __iomem *mmio_base,
			     struct pci_dev *pdev)
{
	void __iomem *hc_base;
	void __iomem *port_base;
	int start_port, num_ports, p, start_hc, num_hcs, hc;

	start_hc = start_port = 0;
	num_ports = 8;		/* should be benign for 4 port devs */
	num_hcs = 2;
	dev_dbg(&pdev->dev,
		"%s: All registers for port(s) %u-%u:\n", __func__,
		start_port, num_ports > 1 ? num_ports - 1 : start_port);

	dev_dbg(&pdev->dev, "%s: PCI config space regs:\n", __func__);
	mv_dump_pci_cfg(pdev, 0x68);

	dev_dbg(&pdev->dev, "%s: PCI regs:\n", __func__);
	mv_dump_mem(&pdev->dev, mmio_base+0xc00, 0x3c);
	mv_dump_mem(&pdev->dev, mmio_base+0xd00, 0x34);
	mv_dump_mem(&pdev->dev, mmio_base+0xf00, 0x4);
	mv_dump_mem(&pdev->dev, mmio_base+0x1d00, 0x6c);
	for (hc = start_hc; hc < start_hc + num_hcs; hc++) {
		hc_base = mv_hc_base(mmio_base, hc);
		dev_dbg(&pdev->dev, "%s: HC regs (HC %i):\n", __func__, hc);
		mv_dump_mem(&pdev->dev, hc_base, 0x1c);
	}
	for (p = start_port; p < start_port + num_ports; p++) {
		port_base = mv_port_base(mmio_base, p);
		dev_dbg(&pdev->dev, "%s: EDMA regs (port %i):\n", __func__, p);
		mv_dump_mem(&pdev->dev, port_base, 0x54);
		dev_dbg(&pdev->dev, "%s: SATA regs (port %i):\n", __func__, p);
		mv_dump_mem(&pdev->dev, port_base+0x300, 0x60);
	}
}

static unsigned int mv_scr_offset(unsigned int sc_reg_in)
{
	unsigned int ofs;

	switch (sc_reg_in) {
	case SCR_STATUS:
	case SCR_CONTROL:
	case SCR_ERROR:
		ofs = SATA_STATUS + (sc_reg_in * sizeof(u32));
		break;
	case SCR_ACTIVE:
		ofs = SATA_ACTIVE;   /* active is not with the others */
		break;
	default:
		ofs = 0xffffffffU;
		break;
	}
	return ofs;
}

static int mv_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val)
{
	unsigned int ofs = mv_scr_offset(sc_reg_in);

	if (ofs != 0xffffffffU) {
		*val = readl(mv_ap_base(link->ap) + ofs);
		return 0;
	} else
		return -EINVAL;
}

static int mv_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val)
{
	unsigned int ofs = mv_scr_offset(sc_reg_in);

	if (ofs != 0xffffffffU) {
		void __iomem *addr = mv_ap_base(link->ap) + ofs;
		struct mv_host_priv *hpriv = link->ap->host->private_data;
		if (sc_reg_in == SCR_CONTROL) {
			/*
			 * Workaround for 88SX60x1 FEr SATA#26:
			 *
			 * COMRESETs have to take care not to accidentally
			 * put the drive to sleep when writing SCR_CONTROL.
			 * Setting bits 12..15 prevents this problem.
			 *
			 * So if we see an outbound COMMRESET, set those bits.
			 * Ditto for the followup write that clears the reset.
			 *
			 * The proprietary driver does this for
			 * all chip versions, and so do we.
			 */
			if ((val & 0xf) == 1 || (readl(addr) & 0xf) == 1)
				val |= 0xf000;

			if (hpriv->hp_flags & MV_HP_FIX_LP_PHY_CTL) {
				void __iomem *lp_phy_addr =
					mv_ap_base(link->ap) + LP_PHY_CTL;
				/*
				 * Set PHY speed according to SControl speed.
				 */
				u32 lp_phy_val =
					LP_PHY_CTL_PIN_PU_PLL |
					LP_PHY_CTL_PIN_PU_RX  |
					LP_PHY_CTL_PIN_PU_TX;

				if ((val & 0xf0) != 0x10)
					lp_phy_val |=
						LP_PHY_CTL_GEN_TX_3G |
						LP_PHY_CTL_GEN_RX_3G;

				writelfl(lp_phy_val, lp_phy_addr);
			}
		}
		writelfl(val, addr);
		return 0;
	} else
		return -EINVAL;
}

static void mv6_dev_config(struct ata_device *adev)
{
	/*
	 * Deal with Gen-II ("mv6") hardware quirks/restrictions:
	 *
	 * Gen-II does not support NCQ over a port multiplier
	 *  (no FIS-based switching).
	 */
	if (adev->flags & ATA_DFLAG_NCQ) {
		if (sata_pmp_attached(adev->link->ap)) {
			adev->flags &= ~ATA_DFLAG_NCQ;
			ata_dev_info(adev,
				"NCQ disabled for command-based switching\n");
		}
	}
}

static int mv_qc_defer(struct ata_queued_cmd *qc)
{
	struct ata_link *link = qc->dev->link;
	struct ata_port *ap = link->ap;
	struct mv_port_priv *pp = ap->private_data;

	/*
	 * Don't allow new commands if we're in a delayed EH state
	 * for NCQ and/or FIS-based switching.
	 */
	if (pp->pp_flags & MV_PP_FLAG_DELAYED_EH)
		return ATA_DEFER_PORT;

	/* PIO commands need exclusive link: no other commands [DMA or PIO]
	 * can run concurrently.
	 * set excl_link when we want to send a PIO command in DMA mode
	 * or a non-NCQ command in NCQ mode.
	 * When we receive a command from that link, and there are no
	 * outstanding commands, mark a flag to clear excl_link and let
	 * the command go through.
	 */
	if (unlikely(ap->excl_link)) {
		if (link == ap->excl_link) {
			if (ap->nr_active_links)
				return ATA_DEFER_PORT;
			qc->flags |= ATA_QCFLAG_CLEAR_EXCL;
			return 0;
		} else
			return ATA_DEFER_PORT;
	}

	/*
	 * If the port is completely idle, then allow the new qc.
	 */
	if (ap->nr_active_links == 0)
		return 0;

	/*
	 * The port is operating in host queuing mode (EDMA) with NCQ
	 * enabled, allow multiple NCQ commands.  EDMA also allows
	 * queueing multiple DMA commands but libata core currently
	 * doesn't allow it.
	 */
	if ((pp->pp_flags & MV_PP_FLAG_EDMA_EN) &&
	    (pp->pp_flags & MV_PP_FLAG_NCQ_EN)) {
		if (ata_is_ncq(qc->tf.protocol))
			return 0;
		else {
			ap->excl_link = link;
			return ATA_DEFER_PORT;
		}
	}

	return ATA_DEFER_PORT;
}

static void mv_config_fbs(struct ata_port *ap, int want_ncq, int want_fbs)
{
	struct mv_port_priv *pp = ap->private_data;
	void __iomem *port_mmio;

	u32 fiscfg,   *old_fiscfg   = &pp->cached.fiscfg;
	u32 ltmode,   *old_ltmode   = &pp->cached.ltmode;
	u32 haltcond, *old_haltcond = &pp->cached.haltcond;

	ltmode   = *old_ltmode & ~LTMODE_BIT8;
	haltcond = *old_haltcond | EDMA_ERR_DEV;

	if (want_fbs) {
		fiscfg = *old_fiscfg | FISCFG_SINGLE_SYNC;
		ltmode = *old_ltmode | LTMODE_BIT8;
		if (want_ncq)
			haltcond &= ~EDMA_ERR_DEV;
		else
			fiscfg |=  FISCFG_WAIT_DEV_ERR;
	} else {
		fiscfg = *old_fiscfg & ~(FISCFG_SINGLE_SYNC | FISCFG_WAIT_DEV_ERR);
	}

	port_mmio = mv_ap_base(ap);
	mv_write_cached_reg(port_mmio + FISCFG, old_fiscfg, fiscfg);
	mv_write_cached_reg(port_mmio + LTMODE, old_ltmode, ltmode);
	mv_write_cached_reg(port_mmio + EDMA_HALTCOND, old_haltcond, haltcond);
}

static void mv_60x1_errata_sata25(struct ata_port *ap, int want_ncq)
{
	struct mv_host_priv *hpriv = ap->host->private_data;
	u32 old, new;

	/* workaround for 88SX60x1 FEr SATA#25 (part 1) */
	old = readl(hpriv->base + GPIO_PORT_CTL);
	if (want_ncq)
		new = old | (1 << 22);
	else
		new = old & ~(1 << 22);
	if (new != old)
		writel(new, hpriv->base + GPIO_PORT_CTL);
}

/*
 *	mv_bmdma_enable - set a magic bit on GEN_IIE to allow bmdma
 *	@ap: Port being initialized
 *
 *	There are two DMA modes on these chips:  basic DMA, and EDMA.
 *
 *	Bit-0 of the "EDMA RESERVED" register enables/disables use
 *	of basic DMA on the GEN_IIE versions of the chips.
 *
 *	This bit survives EDMA resets, and must be set for basic DMA
 *	to function, and should be cleared when EDMA is active.
 */
static void mv_bmdma_enable_iie(struct ata_port *ap, int enable_bmdma)
{
	struct mv_port_priv *pp = ap->private_data;
	u32 new, *old = &pp->cached.unknown_rsvd;

	if (enable_bmdma)
		new = *old | 1;
	else
		new = *old & ~1;
	mv_write_cached_reg(mv_ap_base(ap) + EDMA_UNKNOWN_RSVD, old, new);
}

/*
 * SOC chips have an issue whereby the HDD LEDs don't always blink
 * during I/O when NCQ is enabled. Enabling a special "LED blink" mode
 * of the SOC takes care of it, generating a steady blink rate when
 * any drive on the chip is active.
 *
 * Unfortunately, the blink mode is a global hardware setting for the SOC,
 * so we must use it whenever at least one port on the SOC has NCQ enabled.
 *
 * We turn "LED blink" off when NCQ is not in use anywhere, because the normal
 * LED operation works then, and provides better (more accurate) feedback.
 *
 * Note that this code assumes that an SOC never has more than one HC onboard.
 */
static void mv_soc_led_blink_enable(struct ata_port *ap)
{
	struct ata_host *host = ap->host;
	struct mv_host_priv *hpriv = host->private_data;
	void __iomem *hc_mmio;
	u32 led_ctrl;

	if (hpriv->hp_flags & MV_HP_QUIRK_LED_BLINK_EN)
		return;
	hpriv->hp_flags |= MV_HP_QUIRK_LED_BLINK_EN;
	hc_mmio = mv_hc_base_from_port(mv_host_base(host), ap->port_no);
	led_ctrl = readl(hc_mmio + SOC_LED_CTRL);
	writel(led_ctrl | SOC_LED_CTRL_BLINK, hc_mmio + SOC_LED_CTRL);
}

static void mv_soc_led_blink_disable(struct ata_port *ap)
{
	struct ata_host *host = ap->host;
	struct mv_host_priv *hpriv = host->private_data;
	void __iomem *hc_mmio;
	u32 led_ctrl;
	unsigned int port;

	if (!(hpriv->hp_flags & MV_HP_QUIRK_LED_BLINK_EN))
		return;

	/* disable led-blink only if no ports are using NCQ */
	for (port = 0; port < hpriv->n_ports; port++) {
		struct ata_port *this_ap = host->ports[port];
		struct mv_port_priv *pp = this_ap->private_data;

		if (pp->pp_flags & MV_PP_FLAG_NCQ_EN)
			return;
	}

	hpriv->hp_flags &= ~MV_HP_QUIRK_LED_BLINK_EN;
	hc_mmio = mv_hc_base_from_port(mv_host_base(host), ap->port_no);
	led_ctrl = readl(hc_mmio + SOC_LED_CTRL);
	writel(led_ctrl & ~SOC_LED_CTRL_BLINK, hc_mmio + SOC_LED_CTRL);
}

static void mv_edma_cfg(struct ata_port *ap, int want_ncq, int want_edma)
{
	u32 cfg;
	struct mv_port_priv *pp    = ap->private_data;
	struct mv_host_priv *hpriv = ap->host->private_data;
	void __iomem *port_mmio    = mv_ap_base(ap);

	/* set up non-NCQ EDMA configuration */
	cfg = EDMA_CFG_Q_DEPTH;		/* always 0x1f for *all* chips */
	pp->pp_flags &=
	  ~(MV_PP_FLAG_FBS_EN | MV_PP_FLAG_NCQ_EN | MV_PP_FLAG_FAKE_ATA_BUSY);

	if (IS_GEN_I(hpriv))
		cfg |= (1 << 8);	/* enab config burst size mask */

	else if (IS_GEN_II(hpriv)) {
		cfg |= EDMA_CFG_RD_BRST_EXT | EDMA_CFG_WR_BUFF_LEN;
		mv_60x1_errata_sata25(ap, want_ncq);

	} else if (IS_GEN_IIE(hpriv)) {
		int want_fbs = sata_pmp_attached(ap);
		/*
		 * Possible future enhancement:
		 *
		 * The chip can use FBS with non-NCQ, if we allow it,
		 * But first we need to have the error handling in place
		 * for this mode (datasheet section 7.3.15.4.2.3).
		 * So disallow non-NCQ FBS for now.
		 */
		want_fbs &= want_ncq;

		mv_config_fbs(ap, want_ncq, want_fbs);

		if (want_fbs) {
			pp->pp_flags |= MV_PP_FLAG_FBS_EN;
			cfg |= EDMA_CFG_EDMA_FBS; /* FIS-based switching */
		}

		cfg |= (1 << 23);	/* do not mask PM field in rx'd FIS */
		if (want_edma) {
			cfg |= (1 << 22); /* enab 4-entry host queue cache */
			if (!IS_SOC(hpriv))
				cfg |= (1 << 18); /* enab early completion */
		}
		if (hpriv->hp_flags & MV_HP_CUT_THROUGH)
			cfg |= (1 << 17); /* enab cut-thru (dis stor&forwrd) */
		mv_bmdma_enable_iie(ap, !want_edma);

		if (IS_SOC(hpriv)) {
			if (want_ncq)
				mv_soc_led_blink_enable(ap);
			else
				mv_soc_led_blink_disable(ap);
		}
	}

	if (want_ncq) {
		cfg |= EDMA_CFG_NCQ;
		pp->pp_flags |=  MV_PP_FLAG_NCQ_EN;
	}

	writelfl(cfg, port_mmio + EDMA_CFG);
}

static void mv_port_free_dma_mem(struct ata_port *ap)
{
	struct mv_host_priv *hpriv = ap->host->private_data;
	struct mv_port_priv *pp = ap->private_data;
	int tag;

	if (pp->crqb) {
		dma_pool_free(hpriv->crqb_pool, pp->crqb, pp->crqb_dma);
		pp->crqb = NULL;
	}
	if (pp->crpb) {
		dma_pool_free(hpriv->crpb_pool, pp->crpb, pp->crpb_dma);
		pp->crpb = NULL;
	}
	/*
	 * For GEN_I, there's no NCQ, so we have only a single sg_tbl.
	 * For later hardware, we have one unique sg_tbl per NCQ tag.
	 */
	for (tag = 0; tag < MV_MAX_Q_DEPTH; ++tag) {
		if (pp->sg_tbl[tag]) {
			if (tag == 0 || !IS_GEN_I(hpriv))
				dma_pool_free(hpriv->sg_tbl_pool,
					      pp->sg_tbl[tag],
					      pp->sg_tbl_dma[tag]);
			pp->sg_tbl[tag] = NULL;
		}
	}
}

/**
 *      mv_port_start - Port specific init/start routine.
 *      @ap: ATA channel to manipulate
 *
 *      Allocate and point to DMA memory, init port private memory,
 *      zero indices.
 *
 *      LOCKING:
 *      Inherited from caller.
 */
static int mv_port_start(struct ata_port *ap)
{
	struct device *dev = ap->host->dev;
	struct mv_host_priv *hpriv = ap->host->private_data;
	struct mv_port_priv *pp;
	unsigned long flags;
	int tag;

	pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
	if (!pp)
		return -ENOMEM;
	ap->private_data = pp;

	pp->crqb = dma_pool_zalloc(hpriv->crqb_pool, GFP_KERNEL, &pp->crqb_dma);
	if (!pp->crqb)
		return -ENOMEM;

	pp->crpb = dma_pool_zalloc(hpriv->crpb_pool, GFP_KERNEL, &pp->crpb_dma);
	if (!pp->crpb)
		goto out_port_free_dma_mem;

	/* 6041/6081 Rev. "C0" (and newer) are okay with async notify */
	if (hpriv->hp_flags & MV_HP_ERRATA_60X1C0)
		ap->flags |= ATA_FLAG_AN;
	/*
	 * For GEN_I, there's no NCQ, so we only allocate a single sg_tbl.
	 * For later hardware, we need one unique sg_tbl per NCQ tag.
	 */
	for (tag = 0; tag < MV_MAX_Q_DEPTH; ++tag) {
		if (tag == 0 || !IS_GEN_I(hpriv)) {
			pp->sg_tbl[tag] = dma_pool_alloc(hpriv->sg_tbl_pool,
					      GFP_KERNEL, &pp->sg_tbl_dma[tag]);
			if (!pp->sg_tbl[tag])
				goto out_port_free_dma_mem;
		} else {
			pp->sg_tbl[tag]     = pp->sg_tbl[0];
			pp->sg_tbl_dma[tag] = pp->sg_tbl_dma[0];
		}
	}

	spin_lock_irqsave(ap->lock, flags);
	mv_save_cached_regs(ap);
	mv_edma_cfg(ap, 0, 0);
	spin_unlock_irqrestore(ap->lock, flags);

	return 0;

out_port_free_dma_mem:
	mv_port_free_dma_mem(ap);
	return -ENOMEM;
}

/**
 *      mv_port_stop - Port specific cleanup/stop routine.
 *      @ap: ATA channel to manipulate
 *
 *      Stop DMA, cleanup port memory.
 *
 *      LOCKING:
 *      This routine uses the host lock to protect the DMA stop.
 */
static void mv_port_stop(struct ata_port *ap)
{
	unsigned long flags;

	spin_lock_irqsave(ap->lock, flags);
	mv_stop_edma(ap);
	mv_enable_port_irqs(ap, 0);
	spin_unlock_irqrestore(ap->lock, flags);
	mv_port_free_dma_mem(ap);
}

/**
 *      mv_fill_sg - Fill out the Marvell ePRD (scatter gather) entries
 *      @qc: queued command whose SG list to source from
 *
 *      Populate the SG list and mark the last entry.
 *
 *      LOCKING:
 *      Inherited from caller.
 */
static void mv_fill_sg(struct ata_queued_cmd *qc)
{
	struct mv_port_priv *pp = qc->ap->private_data;
	struct scatterlist *sg;
	struct mv_sg *mv_sg, *last_sg = NULL;
	unsigned int si;

	mv_sg = pp->sg_tbl[qc->hw_tag];
	for_each_sg(qc->sg, sg, qc->n_elem, si) {
		dma_addr_t addr = sg_dma_address(sg);
		u32 sg_len = sg_dma_len(sg);

		while (sg_len) {
			u32 offset = addr & 0xffff;
			u32 len = sg_len;

			if (offset + len > 0x10000)
				len = 0x10000 - offset;

			mv_sg->addr = cpu_to_le32(addr & 0xffffffff);
			mv_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
			mv_sg->flags_size = cpu_to_le32(len & 0xffff);
			mv_sg->reserved = 0;

			sg_len -= len;
			addr += len;

			last_sg = mv_sg;
			mv_sg++;
		}
	}

	if (likely(last_sg))
		last_sg->flags_size |= cpu_to_le32(EPRD_FLAG_END_OF_TBL);
	mb(); /* ensure data structure is visible to the chipset */
}

static void mv_crqb_pack_cmd(__le16 *cmdw, u8 data, u8 addr, unsigned last)
{
	u16 tmp = data | (addr << CRQB_CMD_ADDR_SHIFT) | CRQB_CMD_CS |
		(last ? CRQB_CMD_LAST : 0);
	*cmdw = cpu_to_le16(tmp);
}

/**
 *	mv_sff_irq_clear - Clear hardware interrupt after DMA.
 *	@ap: Port associated with this ATA transaction.
 *
 *	We need this only for ATAPI bmdma transactions,
 *	as otherwise we experience spurious interrupts
 *	after libata-sff handles the bmdma interrupts.
 */
static void mv_sff_irq_clear(struct ata_port *ap)
{
	mv_clear_and_enable_port_irqs(ap, mv_ap_base(ap), ERR_IRQ);
}

/**
 *	mv_check_atapi_dma - Filter ATAPI cmds which are unsuitable for DMA.
 *	@qc: queued command to check for chipset/DMA compatibility.
 *
 *	The bmdma engines cannot handle speculative data sizes
 *	(bytecount under/over flow).  So only allow DMA for
 *	data transfer commands with known data sizes.
 *
 *	LOCKING:
 *	Inherited from caller.
 */
static int mv_check_atapi_dma(struct ata_queued_cmd *qc)
{
	struct scsi_cmnd *scmd = qc->scsicmd;

	if (scmd) {
		switch (scmd->cmnd[0]) {
		case READ_6:
		case READ_10:
		case READ_12:
		case WRITE_6:
		case WRITE_10:
		case WRITE_12:
		case GPCMD_READ_CD:
		case GPCMD_SEND_DVD_STRUCTURE:
		case GPCMD_SEND_CUE_SHEET:
			return 0; /* DMA is safe */
		}
	}
	return -EOPNOTSUPP; /* use PIO instead */
}

/**
 *	mv_bmdma_setup - Set up BMDMA transaction
 *	@qc: queued command to prepare DMA for.
 *
 *	LOCKING:
 *	Inherited from caller.
 */
static void mv_bmdma_setup(struct ata_queued_cmd *qc)
{
	struct ata_port *ap = qc->ap;
	void __iomem *port_mmio = mv_ap_base(ap);
	struct mv_port_priv *pp = ap->private_data;

	mv_fill_sg(qc);

	/* clear all DMA cmd bits */
	writel(0, port_mmio + BMDMA_CMD);

	/* load PRD table addr. */
	writel((pp->sg_tbl_dma[qc->hw_tag] >> 16) >> 16,
		port_mmio + BMDMA_PRD_HIGH);
	writelfl(pp->sg_tbl_dma[qc->hw_tag],
		port_mmio + BMDMA_PRD_LOW);

	/* issue r/w command */
	ap->ops->sff_exec_command(ap, &qc->tf);
}

/**
 *	mv_bmdma_start - Start a BMDMA transaction
 *	@qc: queued command to start DMA on.
 *
 *	LOCKING:
 *	Inherited from caller.
 */
static void mv_bmdma_start(struct ata_queued_cmd *qc)
{
	struct ata_port *ap = qc->ap;
	void __iomem *port_mmio = mv_ap_base(ap);
	unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
	u32 cmd = (rw ? 0 : ATA_DMA_WR) | ATA_DMA_START;

	/* start host DMA transaction */
	writelfl(cmd, port_mmio + BMDMA_CMD);
}

/**
 *	mv_bmdma_stop_ap - Stop BMDMA transfer
 *	@ap: port to stop
 *
 *	Clears the ATA_DMA_START flag in the bmdma control register
 *
 *	LOCKING:
 *	Inherited from caller.
 */
static void mv_bmdma_stop_ap(struct ata_port *ap)
{
	void __iomem *port_mmio = mv_ap_base(ap);
	u32 cmd;

	/* clear start/stop bit */
	cmd = readl(port_mmio + BMDMA_CMD);
	if (cmd & ATA_DMA_START) {
		cmd &= ~ATA_DMA_START;
		writelfl(cmd, port_mmio + BMDMA_CMD);

		/* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
		ata_sff_dma_pause(ap);
	}
}

static void mv_bmdma_stop(struct ata_queued_cmd *qc)
{
	mv_bmdma_stop_ap(qc->ap);
}

/**
 *	mv_bmdma_status - Read BMDMA status
 *	@ap: port for which to retrieve DMA status.
 *
 *	Read and return equivalent of the sff BMDMA status register.
 *
 *	LOCKING:
 *	Inherited from caller.
 */
static u8 mv_bmdma_status(struct ata_port *ap)
{
	void __iomem *port_mmio = mv_ap_base(ap);
	u32 reg, status;

	/*
	 * Other bits are valid only if ATA_DMA_ACTIVE==0,
	 * and the ATA_DMA_INTR bit doesn't exist.
	 */
	reg = readl(port_mmio + BMDMA_STATUS);
	if (reg & ATA_DMA_ACTIVE)
		status = ATA_DMA_ACTIVE;
	else if (reg & ATA_DMA_ERR)
		status = (reg & ATA_DMA_ERR) | ATA_DMA_INTR;
	else {
		/*
		 * Just because DMA_ACTIVE is 0 (DMA completed),
		 * this does _not_ mean the device is "done".
		 * So we should not yet be signalling ATA_DMA_INTR
		 * in some cases.  Eg. DSM/TRIM, and perhaps others.
		 */
		mv_bmdma_stop_ap(ap);
		if (ioread8(ap->ioaddr.altstatus_addr) & ATA_BUSY)
			status = 0;
		else
			status = ATA_DMA_INTR;
	}
	return status;
}

static void mv_rw_multi_errata_sata24(struct ata_queued_cmd *qc)
{
	struct ata_taskfile *tf = &qc->tf;
	/*
	 * Workaround for 88SX60x1 FEr SATA#24.
	 *
	 * Chip may corrupt WRITEs if multi_count >= 4kB.
	 * Note that READs are unaffected.
	 *
	 * It's not clear if this errata really means "4K bytes",
	 * or if it always happens for multi_count > 7
	 * regardless of device sector_size.
	 *
	 * So, for safety, any write with multi_count > 7
	 * gets converted here into a regular PIO write instead:
	 */
	if ((tf->flags & ATA_TFLAG_WRITE) && is_multi_taskfile(tf)) {
		if (qc->dev->multi_count > 7) {
			switch (tf->command) {
			case ATA_CMD_WRITE_MULTI:
				tf->command = ATA_CMD_PIO_WRITE;
				break;
			case ATA_CMD_WRITE_MULTI_FUA_EXT:
				tf->flags &= ~ATA_TFLAG_FUA; /* ugh */
				fallthrough;
			case ATA_CMD_WRITE_MULTI_EXT:
				tf->command = ATA_CMD_PIO_WRITE_EXT;
				break;
			}
		}
	}
}

/**
 *      mv_qc_prep - Host specific command preparation.
 *      @qc: queued command to prepare
 *
 *      This routine simply redirects to the general purpose routine
 *      if command is not DMA.  Else, it handles prep of the CRQB
 *      (command request block), does some sanity checking, and calls
 *      the SG load routine.
 *
 *      LOCKING:
 *      Inherited from caller.
 */
static enum ata_completion_errors mv_qc_prep(struct ata_queued_cmd *qc)
{
	struct ata_port *ap = qc->ap;
	struct mv_port_priv *pp = ap->private_data;
	__le16 *cw;
	struct ata_taskfile *tf = &qc->tf;
	u16 flags = 0;
	unsigned in_index;

	switch (tf->protocol) {
	case ATA_PROT_DMA:
		if (tf->command == ATA_CMD_DSM)
			return AC_ERR_OK;
		fallthrough;
	case ATA_PROT_NCQ:
		break;	/* continue below */
	case ATA_PROT_PIO:
		mv_rw_multi_errata_sata24(qc);
		return AC_ERR_OK;
	default:
		return AC_ERR_OK;
	}

	/* Fill in command request block
	 */
	if (!(tf->flags & ATA_TFLAG_WRITE))
		flags |= CRQB_FLAG_READ;
	WARN_ON(MV_MAX_Q_DEPTH <= qc->hw_tag);
	flags |= qc->hw_tag << CRQB_TAG_SHIFT;
	flags |= (qc->dev->link->pmp & 0xf) << CRQB_PMP_SHIFT;

	/* get current queue index from software */
	in_index = pp->req_idx;

	pp->crqb[in_index].sg_addr =
		cpu_to_le32(pp->sg_tbl_dma[qc->hw_tag] & 0xffffffff);
	pp->crqb[in_index].sg_addr_hi =
		cpu_to_le32((pp->sg_tbl_dma[qc->hw_tag] >> 16) >> 16);
	pp->crqb[in_index].ctrl_flags = cpu_to_le16(flags);

	cw = &pp->crqb[in_index].ata_cmd[0];

	/* Sadly, the CRQB cannot accommodate all registers--there are
	 * only 11 bytes...so we must pick and choose required
	 * registers based on the command.  So, we drop feature and
	 * hob_feature for [RW] DMA commands, but they are needed for
	 * NCQ.  NCQ will drop hob_nsect, which is not needed there
	 * (nsect is used only for the tag; feat/hob_feat hold true nsect).
	 */
	switch (tf->command) {
	case ATA_CMD_READ:
	case ATA_CMD_READ_EXT:
	case ATA_CMD_WRITE:
	case ATA_CMD_WRITE_EXT:
	case ATA_CMD_WRITE_FUA_EXT:
		mv_crqb_pack_cmd(cw++, tf->hob_nsect, ATA_REG_NSECT, 0);
		break;
	case ATA_CMD_FPDMA_READ:
	case ATA_CMD_FPDMA_WRITE:
		mv_crqb_pack_cmd(cw++, tf->hob_feature, ATA_REG_FEATURE, 0);
		mv_crqb_pack_cmd(cw++, tf->feature, ATA_REG_FEATURE, 0);
		break;
	default:
		/* The only other commands EDMA supports in non-queued and
		 * non-NCQ mode are: [RW] STREAM DMA and W DMA FUA EXT, none
		 * of which are defined/used by Linux.  If we get here, this
		 * driver needs work.
		 */
		ata_port_err(ap, "%s: unsupported command: %.2x\n", __func__,
				tf->command);
		return AC_ERR_INVALID;
	}
	mv_crqb_pack_cmd(cw++, tf->nsect, ATA_REG_NSECT, 0);
	mv_crqb_pack_cmd(cw++, tf->hob_lbal, ATA_REG_LBAL, 0);
	mv_crqb_pack_cmd(cw++, tf->lbal, ATA_REG_LBAL, 0);
	mv_crqb_pack_cmd(cw++, tf->hob_lbam, ATA_REG_LBAM, 0);
	mv_crqb_pack_cmd(cw++, tf->lbam, ATA_REG_LBAM, 0);
	mv_crqb_pack_cmd(cw++, tf->hob_lbah, ATA_REG_LBAH, 0);
	mv_crqb_pack_cmd(cw++, tf->lbah, ATA_REG_LBAH, 0);
	mv_crqb_pack_cmd(cw++, tf->device, ATA_REG_DEVICE, 0);
	mv_crqb_pack_cmd(cw++, tf->command, ATA_REG_CMD, 1);	/* last */

	if (!(qc->flags & ATA_QCFLAG_DMAMAP))
		return AC_ERR_OK;
	mv_fill_sg(qc);

	return AC_ERR_OK;
}

/**
 *      mv_qc_prep_iie - Host specific command preparation.
 *      @qc: queued command to prepare
 *
 *      This routine simply redirects to the general purpose routine
 *      if command is not DMA.  Else, it handles prep of the CRQB
 *      (command request block), does some sanity checking, and calls
 *      the SG load routine.
 *
 *      LOCKING:
 *      Inherited from caller.
 */
static enum ata_completion_errors mv_qc_prep_iie(struct ata_queued_cmd *qc)
{
	struct ata_port *ap = qc->ap;
	struct mv_port_priv *pp = ap->private_data;
	struct mv_crqb_iie *crqb;
	struct ata_taskfile *tf = &qc->tf;
	unsigned in_index;
	u32 flags = 0;

	if ((tf->protocol != ATA_PROT_DMA) &&
	    (tf->protocol != ATA_PROT_NCQ))
		return AC_ERR_OK;
	if (tf->command == ATA_CMD_DSM)
		return AC_ERR_OK;  /* use bmdma for this */

	/* Fill in Gen IIE command request block */
	if (!(tf->flags & ATA_TFLAG_WRITE))
		flags |= CRQB_FLAG_READ;

	WARN_ON(MV_MAX_Q_DEPTH <= qc->hw_tag);
	flags |= qc->hw_tag << CRQB_TAG_SHIFT;
	flags |= qc->hw_tag << CRQB_HOSTQ_SHIFT;
	flags |= (qc->dev->link->pmp & 0xf) << CRQB_PMP_SHIFT;

	/* get current queue index from software */
	in_index = pp->req_idx;

	crqb = (struct mv_crqb_iie *) &pp->crqb[in_index];
	crqb->addr = cpu_to_le32(pp->sg_tbl_dma[qc->hw_tag] & 0xffffffff);
	crqb->addr_hi = cpu_to_le32((pp->sg_tbl_dma[qc->hw_tag] >> 16) >> 16);
	crqb->flags = cpu_to_le32(flags);

	crqb->ata_cmd[0] = cpu_to_le32(
			(tf->command << 16) |
			(tf->feature << 24)
		);
	crqb->ata_cmd[1] = cpu_to_le32(
			(tf->lbal << 0) |
			(tf->lbam << 8) |
			(tf->lbah << 16) |
			(tf->device << 24)
		);
	crqb->ata_cmd[2] = cpu_to_le32(
			(tf->hob_lbal << 0) |
			(tf->hob_lbam << 8) |
			(tf->hob_lbah << 16) |
			(tf->hob_feature << 24)
		);
	crqb->ata_cmd[3] = cpu_to_le32(
			(tf->nsect << 0) |
			(tf->hob_nsect << 8)
		);

	if (!(qc->flags & ATA_QCFLAG_DMAMAP))
		return AC_ERR_OK;
	mv_fill_sg(qc);

	return AC_ERR_OK;
}

/**
 *	mv_sff_check_status - fetch device status, if valid
 *	@ap: ATA port to fetch status from
 *
 *	When using command issue via mv_qc_issue_fis(),
 *	the initial ATA_BUSY state does not show up in the
 *	ATA status (shadow) register.  This can confuse libata!
 *
 *	So we have a hook here to fake ATA_BUSY for that situation,
 *	until the first time a BUSY, DRQ, or ERR bit is seen.
 *
 *	The rest of the time, it simply returns the ATA status register.
 */
static u8 mv_sff_check_status(struct ata_port *ap)
{
	u8 stat = ioread8(ap->ioaddr.status_addr);
	struct mv_port_priv *pp = ap->private_data;

	if (pp->pp_flags & MV_PP_FLAG_FAKE_ATA_BUSY) {
		if (stat & (ATA_BUSY | ATA_DRQ | ATA_ERR))
			pp->pp_flags &= ~MV_PP_FLAG_FAKE_ATA_BUSY;
		else
			stat = ATA_BUSY;
	}
	return stat;
}

/**
 *	mv_send_fis - Send a FIS, using the "Vendor-Unique FIS" register
 *	@ap: ATA port to send a FIS
 *	@fis: fis to be sent
 *	@nwords: number of 32-bit words in the fis
 */
static unsigned int mv_send_fis(struct ata_port *ap, u32 *fis, int nwords)
{
	void __iomem *port_mmio = mv_ap_base(ap);
	u32 ifctl, old_ifctl, ifstat;
	int i, timeout = 200, final_word = nwords - 1;

	/* Initiate FIS transmission mode */
	old_ifctl = readl(port_mmio + SATA_IFCTL);
	ifctl = 0x100 | (old_ifctl & 0xf);
	writelfl(ifctl, port_mmio + SATA_IFCTL);

	/* Send all words of the FIS except for the final word */
	for (i = 0; i < final_word; ++i)
		writel(fis[i], port_mmio + VENDOR_UNIQUE_FIS);

	/* Flag end-of-transmission, and then send the final word */
	writelfl(ifctl | 0x200, port_mmio + SATA_IFCTL);
	writelfl(fis[final_word], port_mmio + VENDOR_UNIQUE_FIS);

	/*
	 * Wait for FIS transmission to complete.
	 * This typically takes just a single iteration.
	 */
	do {
		ifstat = readl(port_mmio + SATA_IFSTAT);
	} while (!(ifstat & 0x1000) && --timeout);

	/* Restore original port configuration */
	writelfl(old_ifctl, port_mmio + SATA_IFCTL);

	/* See if it worked */
	if ((ifstat & 0x3000) != 0x1000) {
		ata_port_warn(ap, "%s transmission error, ifstat=%08x\n",
			      __func__, ifstat);
		return AC_ERR_OTHER;
	}
	return 0;
}

/**
 *	mv_qc_issue_fis - Issue a command directly as a FIS
 *	@qc: queued command to start
 *
 *	Note that the ATA shadow registers are not updated
 *	after command issue, so the device will appear "READY"
 *	if polled, even while it is BUSY processing the command.
 *
 *	So we use a status hook to fake ATA_BUSY until the drive changes state.
 *
 *	Note: we don't get updated shadow regs on *completion*
 *	of non-data commands. So avoid sending them via this function,
 *	as they will appear to have completed immediately.
 *
 *	GEN_IIE has special registers that we could get the result tf from,
 *	but earlier chipsets do not.  For now, we ignore those registers.
 */
static unsigned int mv_qc_issue_fis(struct ata_queued_cmd *qc)
{
	struct ata_port *ap = qc->ap;
	struct mv_port_priv *pp = ap->private_data;
	struct ata_link *link = qc->dev->link;
	u32 fis[5];
	int err = 0;

	ata_tf_to_fis(&qc->tf, link->pmp, 1, (void *)fis);
	err = mv_send_fis(ap, fis, ARRAY_SIZE(fis));
	if (err)
		return err;

	switch (qc->tf.protocol) {
	case ATAPI_PROT_PIO:
		pp->pp_flags |= MV_PP_FLAG_FAKE_ATA_BUSY;
		fallthrough;
	case ATAPI_PROT_NODATA:
		ap->hsm_task_state = HSM_ST_FIRST;
		break;
	case ATA_PROT_PIO:
		pp->pp_flags |= MV_PP_FLAG_FAKE_ATA_BUSY;
		if (qc->tf.flags & ATA_TFLAG_WRITE)
			ap->hsm_task_state = HSM_ST_FIRST;
		else
			ap->hsm_task_state = HSM_ST;
		break;
	default:
		ap->hsm_task_state = HSM_ST_LAST;
		break;
	}

	if (qc->tf.flags & ATA_TFLAG_POLLING)
		ata_sff_queue_pio_task(link, 0);
	return 0;
}

/**
 *      mv_qc_issue - Initiate a command to the host
 *      @qc: queued command to start
 *
 *      This routine simply redirects to the general purpose routine
 *      if command is not DMA.  Else, it sanity checks our local
 *      caches of the request producer/consumer indices then enables
 *      DMA and bumps the request producer index.
 *
 *      LOCKING:
 *      Inherited from caller.
 */
static unsigned int mv_qc_issue(struct ata_queued_cmd *qc)
{
	static int limit_warnings = 10;
	struct ata_port *ap = qc->ap;
	void __iomem *port_mmio = mv_ap_base(ap);
	struct mv_port_priv *pp = ap->private_data;
	u32 in_index;
	unsigned int port_irqs;

	pp->pp_flags &= ~MV_PP_FLAG_FAKE_ATA_BUSY; /* paranoia */

	switch (qc->tf.protocol) {
	case ATA_PROT_DMA:
		if (qc->tf.command == ATA_CMD_DSM) {
			if (!ap->ops->bmdma_setup)  /* no bmdma on GEN_I */
				return AC_ERR_OTHER;
			break;  /* use bmdma for this */
		}
		fallthrough;
	case ATA_PROT_NCQ:
		mv_start_edma(ap, port_mmio, pp, qc->tf.protocol);
		pp->req_idx = (pp->req_idx + 1) & MV_MAX_Q_DEPTH_MASK;
		in_index = pp->req_idx << EDMA_REQ_Q_PTR_SHIFT;

		/* Write the request in pointer to kick the EDMA to life */
		writelfl((pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK) | in_index,
					port_mmio + EDMA_REQ_Q_IN_PTR);
		return 0;

	case ATA_PROT_PIO:
		/*
		 * Errata SATA#16, SATA#24: warn if multiple DRQs expected.
		 *
		 * Someday, we might implement special polling workarounds
		 * for these, but it all seems rather unnecessary since we
		 * normally use only DMA for commands which transfer more
		 * than a single block of data.
		 *
		 * Much of the time, this could just work regardless.
		 * So for now, just log the incident, and allow the attempt.
		 */
		if (limit_warnings > 0 && (qc->nbytes / qc->sect_size) > 1) {
			--limit_warnings;
			ata_link_warn(qc->dev->link, DRV_NAME
				      ": attempting PIO w/multiple DRQ: "
				      "this may fail due to h/w errata\n");
		}
		fallthrough;
	case ATA_PROT_NODATA:
	case ATAPI_PROT_PIO:
	case ATAPI_PROT_NODATA:
		if (ap->flags & ATA_FLAG_PIO_POLLING)
			qc->tf.flags |= ATA_TFLAG_POLLING;
		break;
	}

	if (qc->tf.flags & ATA_TFLAG_POLLING)
		port_irqs = ERR_IRQ;	/* mask device interrupt when polling */
	else
		port_irqs = ERR_IRQ | DONE_IRQ;	/* unmask all interrupts */

	/*
	 * We're about to send a non-EDMA capable command to the
	 * port.  Turn off EDMA so there won't be problems accessing
	 * shadow block, etc registers.
	 */
	mv_stop_edma(ap);
	mv_clear_and_enable_port_irqs(ap, mv_ap_base(ap), port_irqs);
	mv_pmp_select(ap, qc->dev->link->pmp);

	if (qc->tf.command == ATA_CMD_READ_LOG_EXT) {
		struct mv_host_priv *hpriv = ap->host->private_data;
		/*
		 * Workaround for 88SX60x1 FEr SATA#25 (part 2).
		 *
		 * After any NCQ error, the READ_LOG_EXT command
		 * from libata-eh *must* use mv_qc_issue_fis().
		 * Otherwise it might fail, due to chip errata.
		 *
		 * Rather than special-case it, we'll just *always*
		 * use this method here for READ_LOG_EXT, making for
		 * easier testing.
		 */
		if (IS_GEN_II(hpriv))
			return mv_qc_issue_fis(qc);
	}
	return ata_bmdma_qc_issue(qc);
}

static struct ata_queued_cmd *mv_get_active_qc(struct ata_port *ap)
{
	struct mv_port_priv *pp = ap->private_data;
	struct ata_queued_cmd *qc;

	if (pp->pp_flags & MV_PP_FLAG_NCQ_EN)
		return NULL;
	qc = ata_qc_from_tag(ap, ap->link.active_tag);
	if (qc && !(qc->tf.flags & ATA_TFLAG_POLLING))
		return qc;
	return NULL;
}

static void mv_pmp_error_handler(struct ata_port *ap)
{
	unsigned int pmp, pmp_map;
	struct mv_port_priv *pp = ap->private_data;

	if (pp->pp_flags & MV_PP_FLAG_DELAYED_EH) {
		/*
		 * Perform NCQ error analysis on failed PMPs
		 * before we freeze the port entirely.
		 *
		 * The failed PMPs are marked earlier by mv_pmp_eh_prep().
		 */
		pmp_map = pp->delayed_eh_pmp_map;
		pp->pp_flags &= ~MV_PP_FLAG_DELAYED_EH;
		for (pmp = 0; pmp_map != 0; pmp++) {
			unsigned int this_pmp = (1 << pmp);
			if (pmp_map & this_pmp) {
				struct ata_link *link = &ap->pmp_link[pmp];
				pmp_map &= ~this_pmp;
				ata_eh_analyze_ncq_error(link);
			}
		}
		ata_port_freeze(ap);
	}
	sata_pmp_error_handler(ap);
}

static unsigned int mv_get_err_pmp_map(struct ata_port *ap)
{
	void __iomem *port_mmio = mv_ap_base(ap);

	return readl(port_mmio + SATA_TESTCTL) >> 16;
}

static void mv_pmp_eh_prep(struct ata_port *ap, unsigned int pmp_map)
{
	unsigned int pmp;

	/*
	 * Initialize EH info for PMPs which saw device errors
	 */
	for (pmp = 0; pmp_map != 0; pmp++) {
		unsigned int this_pmp = (1 << pmp);
		if (pmp_map & this_pmp) {
			struct ata_link *link = &ap->pmp_link[pmp];
			struct ata_eh_info *ehi = &link->eh_info;

			pmp_map &= ~this_pmp;
			ata_ehi_clear_desc(ehi);
			ata_ehi_push_desc(ehi, "dev err");
			ehi->err_mask |= AC_ERR_DEV;
			ehi->action |= ATA_EH_RESET;
			ata_link_abort(link);
		}
	}
}

static int mv_req_q_empty(struct ata_port *ap)
{
	void __iomem *port_mmio = mv_ap_base(ap);
	u32 in_ptr, out_ptr;

	in_ptr  = (readl(port_mmio + EDMA_REQ_Q_IN_PTR)
			>> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK;
	out_ptr = (readl(port_mmio + EDMA_REQ_Q_OUT_PTR)
			>> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK;
	return (in_ptr == out_ptr);	/* 1 == queue_is_empty */
}

static int mv_handle_fbs_ncq_dev_err(struct ata_port *ap)
{
	struct mv_port_priv *pp = ap->private_data;
	int failed_links;
	unsigned int old_map, new_map;

	/*
	 * Device error during FBS+NCQ operation:
	 *
	 * Set a port flag to prevent further I/O being enqueued.
	 * Leave the EDMA running to drain outstanding commands from this port.
	 * Perform the post-mortem/EH only when all responses are complete.
	 * Follow recovery sequence from 6042/7042 datasheet (7.3.15.4.2.2).
	 */
	if (!(pp->pp_flags & MV_PP_FLAG_DELAYED_EH)) {
		pp->pp_flags |= MV_PP_FLAG_DELAYED_EH;
		pp->delayed_eh_pmp_map = 0;
	}
	old_map = pp->delayed_eh_pmp_map;
	new_map = old_map | mv_get_err_pmp_map(ap);

	if (old_map != new_map) {
		pp->delayed_eh_pmp_map = new_map;
		mv_pmp_eh_prep(ap, new_map & ~old_map);
	}
	failed_links = hweight16(new_map);

	ata_port_info(ap,
		      "%s: pmp_map=%04x qc_map=%04llx failed_links=%d nr_active_links=%d\n",
		      __func__, pp->delayed_eh_pmp_map,
		      ap->qc_active, failed_links,
		      ap->nr_active_links);

	if (ap->nr_active_links <= failed_links && mv_req_q_empty(ap)) {
		mv_process_crpb_entries(ap, pp);
		mv_stop_edma(ap);
		mv_eh_freeze(ap);
		ata_port_info(ap, "%s: done\n", __func__);
		return 1;	/* handled */
	}
	ata_port_info(ap, "%s: waiting\n", __func__);
	return 1;	/* handled */
}

static int mv_handle_fbs_non_ncq_dev_err(struct ata_port *ap)
{
	/*
	 * Possible future enhancement:
	 *
	 * FBS+non-NCQ operation is not yet implemented.
	 * See related notes in mv_edma_cfg().
	 *
	 * Device error during FBS+non-NCQ operation:
	 *
	 * We need to snapshot the shadow registers for each failed command.
	 * Follow recovery sequence from 6042/7042 datasheet (7.3.15.4.2.3).
	 */
	return 0;	/* not handled */
}

static int mv_handle_dev_err(struct ata_port *ap, u32 edma_err_cause)
{
	struct mv_port_priv *pp = ap->private_data;

	if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN))
		return 0;	/* EDMA was not active: not handled */
	if (!(pp->pp_flags & MV_PP_FLAG_FBS_EN))
		return 0;	/* FBS was not active: not handled */

	if (!(edma_err_cause & EDMA_ERR_DEV))
		return 0;	/* non DEV error: not handled */
	edma_err_cause &= ~EDMA_ERR_IRQ_TRANSIENT;
	if (edma_err_cause & ~(EDMA_ERR_DEV | EDMA_ERR_SELF_DIS))
		return 0;	/* other problems: not handled */

	if (pp->pp_flags & MV_PP_FLAG_NCQ_EN) {
		/*
		 * EDMA should NOT have self-disabled for this case.
		 * If it did, then something is wrong elsewhere,
		 * and we cannot handle it here.
		 */
		if (edma_err_cause & EDMA_ERR_SELF_DIS) {
			ata_port_warn(ap, "%s: err_cause=0x%x pp_flags=0x%x\n",
				      __func__, edma_err_cause, pp->pp_flags);
			return 0; /* not handled */
		}
		return mv_handle_fbs_ncq_dev_err(ap);
	} else {
		/*
		 * EDMA should have self-disabled for this case.
		 * If it did not, then something is wrong elsewhere,
		 * and we cannot handle it here.
		 */
		if (!(edma_err_cause & EDMA_ERR_SELF_DIS)) {
			ata_port_warn(ap, "%s: err_cause=0x%x pp_flags=0x%x\n",
				      __func__, edma_err_cause, pp->pp_flags);
			return 0; /* not handled */
		}
		return mv_handle_fbs_non_ncq_dev_err(ap);
	}
	return 0;	/* not handled */
}

static void mv_unexpected_intr(struct ata_port *ap, int edma_was_enabled)
{
	struct ata_eh_info *ehi = &ap->link.eh_info;
	char *when = "idle";

	ata_ehi_clear_desc(ehi);
	if (edma_was_enabled) {
		when = "EDMA enabled";
	} else {
		struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
		if (qc && (qc->tf.flags & ATA_TFLAG_POLLING))
			when = "polling";
	}
	ata_ehi_push_desc(ehi, "unexpected device interrupt while %s", when);
	ehi->err_mask |= AC_ERR_OTHER;
	ehi->action   |= ATA_EH_RESET;
	ata_port_freeze(ap);
}

/**
 *      mv_err_intr - Handle error interrupts on the port
 *      @ap: ATA channel to manipulate
 *
 *      Most cases require a full reset of the chip's state machine,
 *      which also performs a COMRESET.
 *      Also, if the port disabled DMA, update our cached copy to match.
 *
 *      LOCKING:
 *      Inherited from caller.
 */
static void mv_err_intr(struct ata_port *ap)
{
	void __iomem *port_mmio = mv_ap_base(ap);
	u32 edma_err_cause, eh_freeze_mask, serr = 0;
	u32 fis_cause = 0;
	struct mv_port_priv *pp = ap->private_data;
	struct mv_host_priv *hpriv = ap->host->private_data;
	unsigned int action = 0, err_mask = 0;
	struct ata_eh_info *ehi = &ap->link.eh_info;
	struct ata_queued_cmd *qc;
	int abort = 0;

	/*
	 * Read and clear the SError and err_cause bits.
	 * For GenIIe, if EDMA_ERR_TRANS_IRQ_7 is set, we also must read/clear
	 * the FIS_IRQ_CAUSE register before clearing edma_err_cause.
	 */
	sata_scr_read(&ap->link, SCR_ERROR, &serr);
	sata_scr_write_flush(&ap->link, SCR_ERROR, serr);

	edma_err_cause = readl(port_mmio + EDMA_ERR_IRQ_CAUSE);
	if (IS_GEN_IIE(hpriv) && (edma_err_cause & EDMA_ERR_TRANS_IRQ_7)) {
		fis_cause = readl(port_mmio + FIS_IRQ_CAUSE);
		writelfl(~fis_cause, port_mmio + FIS_IRQ_CAUSE);
	}
	writelfl(~edma_err_cause, port_mmio + EDMA_ERR_IRQ_CAUSE);

	if (edma_err_cause & EDMA_ERR_DEV) {
		/*
		 * Device errors during FIS-based switching operation
		 * require special handling.
		 */
		if (mv_handle_dev_err(ap, edma_err_cause))
			return;
	}

	qc = mv_get_active_qc(ap);
	ata_ehi_clear_desc(ehi);
	ata_ehi_push_desc(ehi, "edma_err_cause=%08x pp_flags=%08x",
			  edma_err_cause, pp->pp_flags);

	if (IS_GEN_IIE(hpriv) && (edma_err_cause & EDMA_ERR_TRANS_IRQ_7)) {
		ata_ehi_push_desc(ehi, "fis_cause=%08x", fis_cause);
		if (fis_cause & FIS_IRQ_CAUSE_AN) {
			u32 ec = edma_err_cause &
			       ~(EDMA_ERR_TRANS_IRQ_7 | EDMA_ERR_IRQ_TRANSIENT);
			sata_async_notification(ap);
			if (!ec)
				return; /* Just an AN; no need for the nukes */
			ata_ehi_push_desc(ehi, "SDB notify");
		}
	}
	/*
	 * All generations share these EDMA error cause bits:
	 */
	if (edma_err_cause & EDMA_ERR_DEV) {
		err_mask |= AC_ERR_DEV;
		action |= ATA_EH_RESET;
		ata_ehi_push_desc(ehi, "dev error");
	}
	if (edma_err_cause & (EDMA_ERR_D_PAR | EDMA_ERR_PRD_PAR |
			EDMA_ERR_CRQB_PAR | EDMA_ERR_CRPB_PAR |
			EDMA_ERR_INTRL_PAR)) {
		err_mask |= AC_ERR_ATA_BUS;
		action |= ATA_EH_RESET;
		ata_ehi_push_desc(ehi, "parity error");
	}
	if (edma_err_cause & (EDMA_ERR_DEV_DCON | EDMA_ERR_DEV_CON)) {
		ata_ehi_hotplugged(ehi);
		ata_ehi_push_desc(ehi, edma_err_cause & EDMA_ERR_DEV_DCON ?
			"dev disconnect" : "dev connect");
		action |= ATA_EH_RESET;
	}

	/*
	 * Gen-I has a different SELF_DIS bit,
	 * different FREEZE bits, and no SERR bit:
	 */
	if (IS_GEN_I(hpriv)) {
		eh_freeze_mask = EDMA_EH_FREEZE_5;
		if (edma_err_cause & EDMA_ERR_SELF_DIS_5) {
			pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
			ata_ehi_push_desc(ehi, "EDMA self-disable");
		}
	} else {
		eh_freeze_mask = EDMA_EH_FREEZE;
		if (edma_err_cause & EDMA_ERR_SELF_DIS) {
			pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
			ata_ehi_push_desc(ehi, "EDMA self-disable");
		}
		if (edma_err_cause & EDMA_ERR_SERR) {
			ata_ehi_push_desc(ehi, "SError=%08x", serr);
			err_mask |= AC_ERR_ATA_BUS;
			action |= ATA_EH_RESET;
		}
	}

	if (!err_mask) {
		err_mask = AC_ERR_OTHER;
		action |= ATA_EH_RESET;
	}

	ehi->serror |= serr;
	ehi->action |= action;

	if (qc)
		qc->err_mask |= err_mask;
	else
		ehi->err_mask |= err_mask;

	if (err_mask == AC_ERR_DEV) {
		/*
		 * Cannot do ata_port_freeze() here,
		 * because it would kill PIO access,
		 * which is needed for further diagnosis.
		 */
		mv_eh_freeze(ap);
		abort = 1;
	} else if (edma_err_cause & eh_freeze_mask) {
		/*
		 * Note to self: ata_port_freeze() calls ata_port_abort()
		 */
		ata_port_freeze(ap);
	} else {
		abort = 1;
	}

	if (abort) {
		if (qc)
			ata_link_abort(qc->dev->link);
		else
			ata_port_abort(ap);
	}
}

static bool mv_process_crpb_response(struct ata_port *ap,
		struct mv_crpb *response, unsigned int tag, int ncq_enabled)
{
	u8 ata_status;
	u16 edma_status = le16_to_cpu(response->flags);

	/*
	 * edma_status from a response queue entry:
	 *   LSB is from EDMA_ERR_IRQ_CAUSE (non-NCQ only).
	 *   MSB is saved ATA status from command completion.
	 */
	if (!ncq_enabled) {
		u8 err_cause = edma_status & 0xff & ~EDMA_ERR_DEV;
		if (err_cause) {
			/*
			 * Error will be seen/handled by
			 * mv_err_intr().  So do nothing at all here.
			 */
			return false;
		}
	}
	ata_status = edma_status >> CRPB_FLAG_STATUS_SHIFT;
	if (!ac_err_mask(ata_status))
		return true;
	/* else: leave it for mv_err_intr() */
	return false;
}

static void mv_process_crpb_entries(struct ata_port *ap, struct mv_port_priv *pp)
{
	void __iomem *port_mmio = mv_ap_base(ap);
	struct mv_host_priv *hpriv = ap->host->private_data;
	u32 in_index;
	bool work_done = false;
	u32 done_mask = 0;
	int ncq_enabled = (pp->pp_flags & MV_PP_FLAG_NCQ_EN);

	/* Get the hardware queue position index */
	in_index = (readl(port_mmio + EDMA_RSP_Q_IN_PTR)
			>> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK;

	/* Process new responses from since the last time we looked */
	while (in_index != pp->resp_idx) {
		unsigned int tag;
		struct mv_crpb *response = &pp->crpb[pp->resp_idx];

		pp->resp_idx = (pp->resp_idx + 1) & MV_MAX_Q_DEPTH_MASK;

		if (IS_GEN_I(hpriv)) {
			/* 50xx: no NCQ, only one command active at a time */
			tag = ap->link.active_tag;
		} else {
			/* Gen II/IIE: get command tag from CRPB entry */
			tag = le16_to_cpu(response->id) & 0x1f;
		}
		if (mv_process_crpb_response(ap, response, tag, ncq_enabled))
			done_mask |= 1 << tag;
		work_done = true;
	}

	if (work_done) {
		ata_qc_complete_multiple(ap, ata_qc_get_active(ap) ^ done_mask);

		/* Update the software queue position index in hardware */
		writelfl((pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK) |
			 (pp->resp_idx << EDMA_RSP_Q_PTR_SHIFT),
			 port_mmio + EDMA_RSP_Q_OUT_PTR);
	}
}

static void mv_port_intr(struct ata_port *ap, u32 port_cause)
{
	struct mv_port_priv *pp;
	int edma_was_enabled;

	/*
	 * Grab a snapshot of the EDMA_EN flag setting,
	 * so that we have a consistent view for this port,
	 * even if something we call of our routines changes it.
	 */
	pp = ap->private_data;
	edma_was_enabled = (pp->pp_flags & MV_PP_FLAG_EDMA_EN);
	/*
	 * Process completed CRPB response(s) before other events.
	 */
	if (edma_was_enabled && (port_cause & DONE_IRQ)) {
		mv_process_crpb_entries(ap, pp);
		if (pp->pp_flags & MV_PP_FLAG_DELAYED_EH)
			mv_handle_fbs_ncq_dev_err(ap);
	}
	/*
	 * Handle chip-reported errors, or continue on to handle PIO.
	 */
	if (unlikely(port_cause & ERR_IRQ)) {
		mv_err_intr(ap);
	} else if (!edma_was_enabled) {
		struct ata_queued_cmd *qc = mv_get_active_qc(ap);
		if (qc)
			ata_bmdma_port_intr(ap, qc);
		else
			mv_unexpected_intr(ap, edma_was_enabled);
	}
}

/**
 *      mv_host_intr - Handle all interrupts on the given host controller
 *      @host: host specific structure
 *      @main_irq_cause: Main interrupt cause register for the chip.
 *
 *      LOCKING:
 *      Inherited from caller.
 */
static int mv_host_intr(struct ata_host *host, u32 main_irq_cause)
{
	struct mv_host_priv *hpriv = host->private_data;
	void __iomem *mmio = hpriv->base, *hc_mmio;
	unsigned int handled = 0, port;

	/* If asserted, clear the "all ports" IRQ coalescing bit */
	if (main_irq_cause & ALL_PORTS_COAL_DONE)
		writel(~ALL_PORTS_COAL_IRQ, mmio + IRQ_COAL_CAUSE);

	for (port = 0; port < hpriv->n_ports; port++) {
		struct ata_port *ap = host->ports[port];
		unsigned int p, shift, hardport, port_cause;

		MV_PORT_TO_SHIFT_AND_HARDPORT(port, shift, hardport);
		/*
		 * Each hc within the host has its own hc_irq_cause register,
		 * where the interrupting ports bits get ack'd.
		 */
		if (hardport == 0) {	/* first port on this hc ? */
			u32 hc_cause = (main_irq_cause >> shift) & HC0_IRQ_PEND;
			u32 port_mask, ack_irqs;
			/*
			 * Skip this entire hc if nothing pending for any ports
			 */
			if (!hc_cause) {
				port += MV_PORTS_PER_HC - 1;
				continue;
			}
			/*
			 * We don't need/want to read the hc_irq_cause register,
			 * because doing so hurts performance, and
			 * main_irq_cause already gives us everything we need.
			 *
			 * But we do have to *write* to the hc_irq_cause to ack
			 * the ports that we are handling this time through.
			 *
			 * This requires that we create a bitmap for those
			 * ports which interrupted us, and use that bitmap
			 * to ack (only) those ports via hc_irq_cause.
			 */
			ack_irqs = 0;
			if (hc_cause & PORTS_0_3_COAL_DONE)
				ack_irqs = HC_COAL_IRQ;
			for (p = 0; p < MV_PORTS_PER_HC; ++p) {
				if ((port + p) >= hpriv->n_ports)
					break;
				port_mask = (DONE_IRQ | ERR_IRQ) << (p * 2);
				if (hc_cause & port_mask)
					ack_irqs |= (DMA_IRQ | DEV_IRQ) << p;
			}
			hc_mmio = mv_hc_base_from_port(mmio, port);
			writelfl(~ack_irqs, hc_mmio + HC_IRQ_CAUSE);
			handled = 1;
		}
		/*
		 * Handle interrupts signalled for this port:
		 */
		port_cause = (main_irq_cause >> shift) & (DONE_IRQ | ERR_IRQ);
		if (port_cause)
			mv_port_intr(ap, port_cause);
	}
	return handled;
}

static int mv_pci_error(struct ata_host *host, void __iomem *mmio)
{
	struct mv_host_priv *hpriv = host->private_data;
	struct ata_port *ap;
	struct ata_queued_cmd *qc;
	struct ata_eh_info *ehi;
	unsigned int i, err_mask, printed = 0;
	u32 err_cause;

	err_cause = readl(mmio + hpriv->irq_cause_offset);

	dev_err(host->dev, "PCI ERROR; PCI IRQ cause=0x%08x\n", err_cause);

	dev_dbg(host->dev, "%s: All regs @ PCI error\n", __func__);
	mv_dump_all_regs(mmio, to_pci_dev(host->dev));

	writelfl(0, mmio + hpriv->irq_cause_offset);

	for (i = 0; i < host->n_ports; i++) {
		ap = host->ports[i];
		if (!ata_link_offline(&ap->link)) {
			ehi = &ap->link.eh_info;
			ata_ehi_clear_desc(ehi);
			if (!printed++)
				ata_ehi_push_desc(ehi,
					"PCI err cause 0x%08x", err_cause);
			err_mask = AC_ERR_HOST_BUS;
			ehi->action = ATA_EH_RESET;
			qc = ata_qc_from_tag(ap, ap->link.active_tag);
			if (qc)
				qc->err_mask |= err_mask;
			else
				ehi->err_mask |= err_mask;

			ata_port_freeze(ap);
		}
	}
	return 1;	/* handled */
}

/**
 *      mv_interrupt - Main interrupt event handler
 *      @irq: unused
 *      @dev_instance: private data; in this case the host structure
 *
 *      Read the read only register to determine if any host
 *      controllers have pending interrupts.  If so, call lower level
 *      routine to handle.  Also check for PCI errors which are only
 *      reported here.
 *
 *      LOCKING:
 *      This routine holds the host lock while processing pending
 *      interrupts.
 */
static irqreturn_t mv_interrupt(int irq, void *dev_instance)
{
	struct ata_host *host = dev_instance;
	struct mv_host_priv *hpriv = host->private_data;
	unsigned int handled = 0;
	int using_msi = hpriv->hp_flags & MV_HP_FLAG_MSI;
	u32 main_irq_cause, pending_irqs;

	spin_lock(&host->lock);

	/* for MSI:  block new interrupts while in here */
	if (using_msi)
		mv_write_main_irq_mask(0, hpriv);

	main_irq_cause = readl(hpriv->main_irq_cause_addr);
	pending_irqs   = main_irq_cause & hpriv->main_irq_mask;
	/*
	 * Deal with cases where we either have nothing pending, or have read
	 * a bogus register value which can indicate HW removal or PCI fault.
	 */
	if (pending_irqs && main_irq_cause != 0xffffffffU) {
		if (unlikely((pending_irqs & PCI_ERR) && !IS_SOC(hpriv)))
			handled = mv_pci_error(host, hpriv->base);
		else
			handled = mv_host_intr(host, pending_irqs);
	}

	/* for MSI: unmask; interrupt cause bits will retrigger now */
	if (using_msi)
		mv_write_main_irq_mask(hpriv->main_irq_mask, hpriv);

	spin_unlock(&host->lock);

	return IRQ_RETVAL(handled);
}

static unsigned int mv5_scr_offset(unsigned int sc_reg_in)
{
	unsigned int ofs;

	switch (sc_reg_in) {
	case SCR_STATUS:
	case SCR_ERROR:
	case SCR_CONTROL:
		ofs = sc_reg_in * sizeof(u32);
		break;
	default:
		ofs = 0xffffffffU;
		break;
	}
	return ofs;
}

static int mv5_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val)
{
	struct mv_host_priv *hpriv = link->ap->host->private_data;
	void __iomem *mmio = hpriv->base;
	void __iomem *addr = mv5_phy_base(mmio, link->ap->port_no);
	unsigned int ofs = mv5_scr_offset(sc_reg_in);

	if (ofs != 0xffffffffU) {
		*val = readl(addr + ofs);
		return 0;
	} else
		return -EINVAL;
}

static int mv5_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val)
{
	struct mv_host_priv *hpriv = link->ap->host->private_data;
	void __iomem *mmio = hpriv->base;
	void __iomem *addr = mv5_phy_base(mmio, link->ap->port_no);
	unsigned int ofs = mv5_scr_offset(sc_reg_in);

	if (ofs != 0xffffffffU) {
		writelfl(val, addr + ofs);
		return 0;
	} else
		return -EINVAL;
}

static void mv5_reset_bus(struct ata_host *host, void __iomem *mmio)
{
	struct pci_dev *pdev = to_pci_dev(host->dev);
	int early_5080;

	early_5080 = (pdev->device == 0x5080) && (pdev->revision == 0);

	if (!early_5080) {
		u32 tmp = readl(mmio + MV_PCI_EXP_ROM_BAR_CTL);
		tmp |= (1 << 0);
		writel(tmp, mmio + MV_PCI_EXP_ROM_BAR_CTL);
	}

	mv_reset_pci_bus(host, mmio);
}

static void mv5_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio)
{
	writel(0x0fcfffff, mmio + FLASH_CTL);
}

static void mv5_read_preamp(struct mv_host_priv *hpriv, int idx,
			   void __iomem *mmio)
{
	void __iomem *phy_mmio = mv5_phy_base(mmio, idx);
	u32 tmp;

	tmp = readl(phy_mmio + MV5_PHY_MODE);

	hpriv->signal[idx].pre = tmp & 0x1800;	/* bits 12:11 */
	hpriv->signal[idx].amps = tmp & 0xe0;	/* bits 7:5 */
}

static void mv5_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio)
{
	u32 tmp;

	writel(0, mmio + GPIO_PORT_CTL);

	/* FIXME: handle MV_HP_ERRATA_50XXB2 errata */

	tmp = readl(mmio + MV_PCI_EXP_ROM_BAR_CTL);
	tmp |= ~(1 << 0);
	writel(tmp, mmio + MV_PCI_EXP_ROM_BAR_CTL);
}

static void mv5_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
			   unsigned int port)
{
	void __iomem *phy_mmio = mv5_phy_base(mmio, port);
	const u32 mask = (1<<12) | (1<<11) | (1<<7) | (1<<6) | (1<<5);
	u32 tmp;
	int fix_apm_sq = (hpriv->hp_flags & MV_HP_ERRATA_50XXB0);

	if (fix_apm_sq) {
		tmp = readl(phy_mmio + MV5_LTMODE);
		tmp |= (1 << 19);
		writel(tmp, phy_mmio + MV5_LTMODE);

		tmp = readl(phy_mmio + MV5_PHY_CTL);
		tmp &= ~0x3;
		tmp |= 0x1;
		writel(tmp, phy_mmio + MV5_PHY_CTL);
	}

	tmp = readl(phy_mmio + MV5_PHY_MODE);
	tmp &= ~mask;
	tmp |= hpriv->signal[port].pre;
	tmp |= hpriv->signal[port].amps;
	writel(tmp, phy_mmio + MV5_PHY_MODE);
}


#undef ZERO
#define ZERO(reg) writel(0, port_mmio + (reg))
static void mv5_reset_hc_port(struct mv_host_priv *hpriv, void __iomem *mmio,
			     unsigned int port)
{
	void __iomem *port_mmio = mv_port_base(mmio, port);

	mv_reset_channel(hpriv, mmio, port);

	ZERO(0x028);	/* command */
	writel(0x11f, port_mmio + EDMA_CFG);
	ZERO(0x004);	/* timer */
	ZERO(0x008);	/* irq err cause */
	ZERO(0x00c);	/* irq err mask */
	ZERO(0x010);	/* rq bah */
	ZERO(0x014);	/* rq inp */
	ZERO(0x018);	/* rq outp */
	ZERO(0x01c);	/* respq bah */
	ZERO(0x024);	/* respq outp */
	ZERO(0x020);	/* respq inp */
	ZERO(0x02c);	/* test control */
	writel(0xbc, port_mmio + EDMA_IORDY_TMOUT);
}
#undef ZERO

#define ZERO(reg) writel(0, hc_mmio + (reg))
static void mv5_reset_one_hc(struct mv_host_priv *hpriv, void __iomem *mmio,
			unsigned int hc)
{
	void __iomem *hc_mmio = mv_hc_base(mmio, hc);
	u32 tmp;

	ZERO(0x00c);
	ZERO(0x010);
	ZERO(0x014);
	ZERO(0x018);

	tmp = readl(hc_mmio + 0x20);
	tmp &= 0x1c1c1c1c;
	tmp |= 0x03030303;
	writel(tmp, hc_mmio + 0x20);
}
#undef ZERO

static int mv5_reset_hc(struct ata_host *host, void __iomem *mmio,
			unsigned int n_hc)
{
	struct mv_host_priv *hpriv = host->private_data;
	unsigned int hc, port;

	for (hc = 0; hc < n_hc; hc++) {
		for (port = 0; port < MV_PORTS_PER_HC; port++)
			mv5_reset_hc_port(hpriv, mmio,
					  (hc * MV_PORTS_PER_HC) + port);

		mv5_reset_one_hc(hpriv, mmio, hc);
	}

	return 0;
}

#undef ZERO
#define ZERO(reg) writel(0, mmio + (reg))
static void mv_reset_pci_bus(struct ata_host *host, void __iomem *mmio)
{
	struct mv_host_priv *hpriv = host->private_data;
	u32 tmp;

	tmp = readl(mmio + MV_PCI_MODE);
	tmp &= 0xff00ffff;
	writel(tmp, mmio + MV_PCI_MODE);

	ZERO(MV_PCI_DISC_TIMER);
	ZERO(MV_PCI_MSI_TRIGGER);
	writel(0x000100ff, mmio + MV_PCI_XBAR_TMOUT);
	ZERO(MV_PCI_SERR_MASK);
	ZERO(hpriv->irq_cause_offset);
	ZERO(hpriv->irq_mask_offset);
	ZERO(MV_PCI_ERR_LOW_ADDRESS);
	ZERO(MV_PCI_ERR_HIGH_ADDRESS);
	ZERO(MV_PCI_ERR_ATTRIBUTE);
	ZERO(MV_PCI_ERR_COMMAND);
}
#undef ZERO

static void mv6_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio)
{
	u32 tmp;

	mv5_reset_flash(hpriv, mmio);

	tmp = readl(mmio + GPIO_PORT_CTL);
	tmp &= 0x3;
	tmp |= (1 << 5) | (1 << 6);
	writel(tmp, mmio + GPIO_PORT_CTL);
}

/*
 *      mv6_reset_hc - Perform the 6xxx global soft reset
 *      @mmio: base address of the HBA
 *
 *      This routine only applies to 6xxx parts.
 *
 *      LOCKING:
 *      Inherited from caller.
 */
static int mv6_reset_hc(struct ata_host *host, void __iomem *mmio,
			unsigned int n_hc)
{
	void __iomem *reg = mmio + PCI_MAIN_CMD_STS;
	int i, rc = 0;
	u32 t;

	/* Following procedure defined in PCI "main command and status
	 * register" table.
	 */
	t = readl(reg);
	writel(t | STOP_PCI_MASTER, reg);

	for (i = 0; i < 1000; i++) {
		udelay(1);
		t = readl(reg);
		if (PCI_MASTER_EMPTY & t)
			break;
	}
	if (!(PCI_MASTER_EMPTY & t)) {
		dev_err(host->dev, "PCI master won't flush\n");
		rc = 1;
		goto done;
	}

	/* set reset */
	i = 5;
	do {
		writel(t | GLOB_SFT_RST, reg);
		t = readl(reg);
		udelay(1);
	} while (!(GLOB_SFT_RST & t) && (i-- > 0));

	if (!(GLOB_SFT_RST & t)) {
		dev_err(host->dev, "can't set global reset\n");
		rc = 1;
		goto done;
	}

	/* clear reset and *reenable the PCI master* (not mentioned in spec) */
	i = 5;
	do {
		writel(t & ~(GLOB_SFT_RST | STOP_PCI_MASTER), reg);
		t = readl(reg);
		udelay(1);
	} while ((GLOB_SFT_RST & t) && (i-- > 0));

	if (GLOB_SFT_RST & t) {
		dev_err(host->dev, "can't clear global reset\n");
		rc = 1;
	}
done:
	return rc;
}

static void mv6_read_preamp(struct mv_host_priv *hpriv, int idx,
			   void __iomem *mmio)
{
	void __iomem *port_mmio;
	u32 tmp;

	tmp = readl(mmio + RESET_CFG);
	if ((tmp & (1 << 0)) == 0) {
		hpriv->signal[idx].amps = 0x7 << 8;
		hpriv->signal[idx].pre = 0x1 << 5;
		return;
	}

	port_mmio = mv_port_base(mmio, idx);
	tmp = readl(port_mmio + PHY_MODE2);

	hpriv->signal[idx].amps = tmp & 0x700;	/* bits 10:8 */
	hpriv->signal[idx].pre = tmp & 0xe0;	/* bits 7:5 */
}

static void mv6_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio)
{
	writel(0x00000060, mmio + GPIO_PORT_CTL);
}

static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
			   unsigned int port)
{
	void __iomem *port_mmio = mv_port_base(mmio, port);

	u32 hp_flags = hpriv->hp_flags;
	int fix_phy_mode2 =
		hp_flags & (MV_HP_ERRATA_60X1B2 | MV_HP_ERRATA_60X1C0);
	int fix_phy_mode4 =
		hp_flags & (MV_HP_ERRATA_60X1B2 | MV_HP_ERRATA_60X1C0);
	u32 m2, m3;

	if (fix_phy_mode2) {
		m2 = readl(port_mmio + PHY_MODE2);
		m2 &= ~(1 << 16);
		m2 |= (1 << 31);
		writel(m2, port_mmio + PHY_MODE2);

		udelay(200);

		m2 = readl(port_mmio + PHY_MODE2);
		m2 &= ~((1 << 16) | (1 << 31));
		writel(m2, port_mmio + PHY_MODE2);

		udelay(200);
	}

	/*
	 * Gen-II/IIe PHY_MODE3 errata RM#2:
	 * Achieves better receiver noise performance than the h/w default:
	 */
	m3 = readl(port_mmio + PHY_MODE3);
	m3 = (m3 & 0x1f) | (0x5555601 << 5);

	/* Guideline 88F5182 (GL# SATA-S11) */
	if (IS_SOC(hpriv))
		m3 &= ~0x1c;

	if (fix_phy_mode4) {
		u32 m4 = readl(port_mmio + PHY_MODE4);
		/*
		 * Enforce reserved-bit restrictions on GenIIe devices only.
		 * For earlier chipsets, force only the internal config field
		 *  (workaround for errata FEr SATA#10 part 1).
		 */
		if (IS_GEN_IIE(hpriv))
			m4 = (m4 & ~PHY_MODE4_RSVD_ZEROS) | PHY_MODE4_RSVD_ONES;
		else
			m4 = (m4 & ~PHY_MODE4_CFG_MASK) | PHY_MODE4_CFG_VALUE;
		writel(m4, port_mmio + PHY_MODE4);
	}
	/*
	 * Workaround for 60x1-B2 errata SATA#13:
	 * Any write to PHY_MODE4 (above) may corrupt PHY_MODE3,
	 * so we must always rewrite PHY_MODE3 after PHY_MODE4.
	 * Or ensure we use writelfl() when writing PHY_MODE4.
	 */
	writel(m3, port_mmio + PHY_MODE3);

	/* Revert values of pre-emphasis and signal amps to the saved ones */
	m2 = readl(port_mmio + PHY_MODE2);

	m2 &= ~MV_M2_PREAMP_MASK;
	m2 |= hpriv->signal[port].amps;
	m2 |= hpriv->signal[port].pre;
	m2 &= ~(1 << 16);

	/* according to mvSata 3.6.1, some IIE values are fixed */
	if (IS_GEN_IIE(hpriv)) {
		m2 &= ~0xC30FF01F;
		m2 |= 0x0000900F;
	}

	writel(m2, port_mmio + PHY_MODE2);
}

/* TODO: use the generic LED interface to configure the SATA Presence */
/* & Acitivy LEDs on the board */
static void mv_soc_enable_leds(struct mv_host_priv *hpriv,
				      void __iomem *mmio)
{
	return;
}

static void mv_soc_read_preamp(struct mv_host_priv *hpriv, int idx,
			   void __iomem *mmio)
{
	void __iomem *port_mmio;
	u32 tmp;

	port_mmio = mv_port_base(mmio, idx);
	tmp = readl(port_mmio + PHY_MODE2);

	hpriv->signal[idx].amps = tmp & 0x700;	/* bits 10:8 */
	hpriv->signal[idx].pre = tmp & 0xe0;	/* bits 7:5 */
}

#undef ZERO
#define ZERO(reg) writel(0, port_mmio + (reg))
static void mv_soc_reset_hc_port(struct mv_host_priv *hpriv,
					void __iomem *mmio, unsigned int port)
{
	void __iomem *port_mmio = mv_port_base(mmio, port);

	mv_reset_channel(hpriv, mmio, port);

	ZERO(0x028);		/* command */
	writel(0x101f, port_mmio + EDMA_CFG);
	ZERO(0x004);		/* timer */
	ZERO(0x008);		/* irq err cause */
	ZERO(0x00c);		/* irq err mask */
	ZERO(0x010);		/* rq bah */
	ZERO(0x014);		/* rq inp */
	ZERO(0x018);		/* rq outp */
	ZERO(0x01c);		/* respq bah */
	ZERO(0x024);		/* respq outp */
	ZERO(0x020);		/* respq inp */
	ZERO(0x02c);		/* test control */
	writel(0x800, port_mmio + EDMA_IORDY_TMOUT);
}

#undef ZERO

#define ZERO(reg) writel(0, hc_mmio + (reg))
static void mv_soc_reset_one_hc(struct mv_host_priv *hpriv,
				       void __iomem *mmio)
{
	void __iomem *hc_mmio = mv_hc_base(mmio, 0);

	ZERO(0x00c);
	ZERO(0x010);
	ZERO(0x014);

}

#undef ZERO

static int mv_soc_reset_hc(struct ata_host *host,
				  void __iomem *mmio, unsigned int n_hc)
{
	struct mv_host_priv *hpriv = host->private_data;
	unsigned int port;

	for (port = 0; port < hpriv->n_ports; port++)
		mv_soc_reset_hc_port(hpriv, mmio, port);

	mv_soc_reset_one_hc(hpriv, mmio);

	return 0;
}

static void mv_soc_reset_flash(struct mv_host_priv *hpriv,
				      void __iomem *mmio)
{
	return;
}

static void mv_soc_reset_bus(struct ata_host *host, void __iomem *mmio)
{
	return;
}

static void mv_soc_65n_phy_errata(struct mv_host_priv *hpriv,
				  void __iomem *mmio, unsigned int port)
{
	void __iomem *port_mmio = mv_port_base(mmio, port);
	u32	reg;

	reg = readl(port_mmio + PHY_MODE3);
	reg &= ~(0x3 << 27);	/* SELMUPF (bits 28:27) to 1 */
	reg |= (0x1 << 27);
	reg &= ~(0x3 << 29);	/* SELMUPI (bits 30:29) to 1 */
	reg |= (0x1 << 29);
	writel(reg, port_mmio + PHY_MODE3);

	reg = readl(port_mmio + PHY_MODE4);
	reg &= ~0x1;	/* SATU_OD8 (bit 0) to 0, reserved bit 16 must be set */
	reg |= (0x1 << 16);
	writel(reg, port_mmio + PHY_MODE4);

	reg = readl(port_mmio + PHY_MODE9_GEN2);
	reg &= ~0xf;	/* TXAMP[3:0] (bits 3:0) to 8 */
	reg |= 0x8;
	reg &= ~(0x1 << 14);	/* TXAMP[4] (bit 14) to 0 */
	writel(reg, port_mmio + PHY_MODE9_GEN2);

	reg = readl(port_mmio + PHY_MODE9_GEN1);
	reg &= ~0xf;	/* TXAMP[3:0] (bits 3:0) to 8 */
	reg |= 0x8;
	reg &= ~(0x1 << 14);	/* TXAMP[4] (bit 14) to 0 */
	writel(reg, port_mmio + PHY_MODE9_GEN1);
}

/*
 *	soc_is_65 - check if the soc is 65 nano device
 *
 *	Detect the type of the SoC, this is done by reading the PHYCFG_OFS
 *	register, this register should contain non-zero value and it exists only
 *	in the 65 nano devices, when reading it from older devices we get 0.
 */
static bool soc_is_65n(struct mv_host_priv *hpriv)
{
	void __iomem *port0_mmio = mv_port_base(hpriv->base, 0);

	if (readl(port0_mmio + PHYCFG_OFS))
		return true;
	return false;
}

static void mv_setup_ifcfg(void __iomem *port_mmio, int want_gen2i)
{
	u32 ifcfg = readl(port_mmio + SATA_IFCFG);

	ifcfg = (ifcfg & 0xf7f) | 0x9b1000;	/* from chip spec */
	if (want_gen2i)
		ifcfg |= (1 << 7);		/* enable gen2i speed */
	writelfl(ifcfg, port_mmio + SATA_IFCFG);
}

static void mv_reset_channel(struct mv_host_priv *hpriv, void __iomem *mmio,
			     unsigned int port_no)
{
	void __iomem *port_mmio = mv_port_base(mmio, port_no);

	/*
	 * The datasheet warns against setting EDMA_RESET when EDMA is active
	 * (but doesn't say what the problem might be).  So we first try
	 * to disable the EDMA engine before doing the EDMA_RESET operation.
	 */
	mv_stop_edma_engine(port_mmio);
	writelfl(EDMA_RESET, port_mmio + EDMA_CMD);

	if (!IS_GEN_I(hpriv)) {
		/* Enable 3.0gb/s link speed: this survives EDMA_RESET */
		mv_setup_ifcfg(port_mmio, 1);
	}
	/*
	 * Strobing EDMA_RESET here causes a hard reset of the SATA transport,
	 * link, and physical layers.  It resets all SATA interface registers
	 * (except for SATA_IFCFG), and issues a COMRESET to the dev.
	 */
	writelfl(EDMA_RESET, port_mmio + EDMA_CMD);
	udelay(25);	/* allow reset propagation */
	writelfl(0, port_mmio + EDMA_CMD);

	hpriv->ops->phy_errata(hpriv, mmio, port_no);

	if (IS_GEN_I(hpriv))
		usleep_range(500, 1000);
}

static void mv_pmp_select(struct ata_port *ap, int pmp)
{
	if (sata_pmp_supported(ap)) {
		void __iomem *port_mmio = mv_ap_base(ap);
		u32 reg = readl(port_mmio + SATA_IFCTL);
		int old = reg & 0xf;

		if (old != pmp) {
			reg = (reg & ~0xf) | pmp;
			writelfl(reg, port_mmio + SATA_IFCTL);
		}
	}
}

static int mv_pmp_hardreset(struct ata_link *link, unsigned int *class,
				unsigned long deadline)
{
	mv_pmp_select(link->ap, sata_srst_pmp(link));
	return sata_std_hardreset(link, class, deadline);
}

static int mv_softreset(struct ata_link *link, unsigned int *class,
				unsigned long deadline)
{
	mv_pmp_select(link->ap, sata_srst_pmp(link));
	return ata_sff_softreset(link, class, deadline);
}

static int mv_hardreset(struct ata_link *link, unsigned int *class,
			unsigned long deadline)
{
	struct ata_port *ap = link->ap;
	struct mv_host_priv *hpriv = ap->host->private_data;
	struct mv_port_priv *pp = ap->private_data;
	void __iomem *mmio = hpriv->base;
	int rc, attempts = 0, extra = 0;
	u32 sstatus;
	bool online;

	mv_reset_channel(hpriv, mmio, ap->port_no);
	pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
	pp->pp_flags &=
	  ~(MV_PP_FLAG_FBS_EN | MV_PP_FLAG_NCQ_EN | MV_PP_FLAG_FAKE_ATA_BUSY);

	/* Workaround for errata FEr SATA#10 (part 2) */
	do {
		const unsigned long *timing =
				sata_ehc_deb_timing(&link->eh_context);

		rc = sata_link_hardreset(link, timing, deadline + extra,
					 &online, NULL);
		rc = online ? -EAGAIN : rc;
		if (rc)
			return rc;
		sata_scr_read(link, SCR_STATUS, &sstatus);
		if (!IS_GEN_I(hpriv) && ++attempts >= 5 && sstatus == 0x121) {
			/* Force 1.5gb/s link speed and try again */
			mv_setup_ifcfg(mv_ap_base(ap), 0);
			if (time_after(jiffies + HZ, deadline))
				extra = HZ; /* only extend it once, max */
		}
	} while (sstatus != 0x0 && sstatus != 0x113 && sstatus != 0x123);
	mv_save_cached_regs(ap);
	mv_edma_cfg(ap, 0, 0);

	return rc;
}

static void mv_eh_freeze(struct ata_port *ap)
{
	mv_stop_edma(ap);
	mv_enable_port_irqs(ap, 0);
}

static void mv_eh_thaw(struct ata_port *ap)
{
	struct mv_host_priv *hpriv = ap->host->private_data;
	unsigned int port = ap->port_no;
	unsigned int hardport = mv_hardport_from_port(port);
	void __iomem *hc_mmio = mv_hc_base_from_port(hpriv->base, port);
	void __iomem *port_mmio = mv_ap_base(ap);
	u32 hc_irq_cause;

	/* clear EDMA errors on this port */
	writel(0, port_mmio + EDMA_ERR_IRQ_CAUSE);

	/* clear pending irq events */
	hc_irq_cause = ~((DEV_IRQ | DMA_IRQ) << hardport);
	writelfl(hc_irq_cause, hc_mmio + HC_IRQ_CAUSE);

	mv_enable_port_irqs(ap, ERR_IRQ);
}

/**
 *      mv_port_init - Perform some early initialization on a single port.
 *      @port: libata data structure storing shadow register addresses
 *      @port_mmio: base address of the port
 *
 *      Initialize shadow register mmio addresses, clear outstanding
 *      interrupts on the port, and unmask interrupts for the future
 *      start of the port.
 *
 *      LOCKING:
 *      Inherited from caller.
 */
static void mv_port_init(struct ata_ioports *port,  void __iomem *port_mmio)
{
	void __iomem *serr, *shd_base = port_mmio + SHD_BLK;

	/* PIO related setup
	 */
	port->data_addr = shd_base + (sizeof(u32) * ATA_REG_DATA);
	port->error_addr =
		port->feature_addr = shd_base + (sizeof(u32) * ATA_REG_ERR);
	port->nsect_addr = shd_base + (sizeof(u32) * ATA_REG_NSECT);
	port->lbal_addr = shd_base + (sizeof(u32) * ATA_REG_LBAL);
	port->lbam_addr = shd_base + (sizeof(u32) * ATA_REG_LBAM);
	port->lbah_addr = shd_base + (sizeof(u32) * ATA_REG_LBAH);
	port->device_addr = shd_base + (sizeof(u32) * ATA_REG_DEVICE);
	port->status_addr =
		port->command_addr = shd_base + (sizeof(u32) * ATA_REG_STATUS);
	/* special case: control/altstatus doesn't have ATA_REG_ address */
	port->altstatus_addr = port->ctl_addr = shd_base + SHD_CTL_AST;

	/* Clear any currently outstanding port interrupt conditions */
	serr = port_mmio + mv_scr_offset(SCR_ERROR);
	writelfl(readl(serr), serr);
	writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE);

	/* unmask all non-transient EDMA error interrupts */
	writelfl(~EDMA_ERR_IRQ_TRANSIENT, port_mmio + EDMA_ERR_IRQ_MASK);
}

static unsigned int mv_in_pcix_mode(struct ata_host *host)
{
	struct mv_host_priv *hpriv = host->private_data;
	void __iomem *mmio = hpriv->base;
	u32 reg;

	if (IS_SOC(hpriv) || !IS_PCIE(hpriv))
		return 0;	/* not PCI-X capable */
	reg = readl(mmio + MV_PCI_MODE);
	if ((reg & MV_PCI_MODE_MASK) == 0)
		return 0;	/* conventional PCI mode */
	return 1;	/* chip is in PCI-X mode */
}

static int mv_pci_cut_through_okay(struct ata_host *host)
{
	struct mv_host_priv *hpriv = host->private_data;
	void __iomem *mmio = hpriv->base;
	u32 reg;

	if (!mv_in_pcix_mode(host)) {
		reg = readl(mmio + MV_PCI_COMMAND);
		if (reg & MV_PCI_COMMAND_MRDTRIG)
			return 0; /* not okay */
	}
	return 1; /* okay */
}

static void mv_60x1b2_errata_pci7(struct ata_host *host)
{
	struct mv_host_priv *hpriv = host->private_data;
	void __iomem *mmio = hpriv->base;

	/* workaround for 60x1-B2 errata PCI#7 */
	if (mv_in_pcix_mode(host)) {
		u32 reg = readl(mmio + MV_PCI_COMMAND);
		writelfl(reg & ~MV_PCI_COMMAND_MWRCOM, mmio + MV_PCI_COMMAND);
	}
}

static int mv_chip_id(struct ata_host *host, unsigned int board_idx)
{
	struct pci_dev *pdev = to_pci_dev(host->dev);
	struct mv_host_priv *hpriv = host->private_data;
	u32 hp_flags = hpriv->hp_flags;

	switch (board_idx) {
	case chip_5080:
		hpriv->ops = &mv5xxx_ops;
		hp_flags |= MV_HP_GEN_I;

		switch (pdev->revision) {
		case 0x1:
			hp_flags |= MV_HP_ERRATA_50XXB0;
			break;
		case 0x3:
			hp_flags |= MV_HP_ERRATA_50XXB2;
			break;
		default:
			dev_warn(&pdev->dev,
				 "Applying 50XXB2 workarounds to unknown rev\n");
			hp_flags |= MV_HP_ERRATA_50XXB2;
			break;
		}
		break;

	case chip_504x:
	case chip_508x:
		hpriv->ops = &mv5xxx_ops;
		hp_flags |= MV_HP_GEN_I;

		switch (pdev->revision) {
		case 0x0:
			hp_flags |= MV_HP_ERRATA_50XXB0;
			break;
		case 0x3:
			hp_flags |= MV_HP_ERRATA_50XXB2;
			break;
		default:
			dev_warn(&pdev->dev,
				 "Applying B2 workarounds to unknown rev\n");
			hp_flags |= MV_HP_ERRATA_50XXB2;
			break;
		}
		break;

	case chip_604x:
	case chip_608x:
		hpriv->ops = &mv6xxx_ops;
		hp_flags |= MV_HP_GEN_II;

		switch (pdev->revision) {
		case 0x7:
			mv_60x1b2_errata_pci7(host);
			hp_flags |= MV_HP_ERRATA_60X1B2;
			break;
		case 0x9:
			hp_flags |= MV_HP_ERRATA_60X1C0;
			break;
		default:
			dev_warn(&pdev->dev,
				 "Applying B2 workarounds to unknown rev\n");
			hp_flags |= MV_HP_ERRATA_60X1B2;
			break;
		}
		break;

	case chip_7042:
		hp_flags |= MV_HP_PCIE | MV_HP_CUT_THROUGH;
		if (pdev->vendor == PCI_VENDOR_ID_TTI &&
		    (pdev->device == 0x2300 || pdev->device == 0x2310))
		{
			/*
			 * Highpoint RocketRAID PCIe 23xx series cards:
			 *
			 * Unconfigured drives are treated as "Legacy"
			 * by the BIOS, and it overwrites sector 8 with
			 * a "Lgcy" metadata block prior to Linux boot.
			 *
			 * Configured drives (RAID or JBOD) leave sector 8
			 * alone, but instead overwrite a high numbered
			 * sector for the RAID metadata.  This sector can
			 * be determined exactly, by truncating the physical
			 * drive capacity to a nice even GB value.
			 *
			 * RAID metadata is at: (dev->n_sectors & ~0xfffff)
			 *
			 * Warn the user, lest they think we're just buggy.
			 */
			dev_warn(&pdev->dev, "Highpoint RocketRAID"
				" BIOS CORRUPTS DATA on all attached drives,"
				" regardless of if/how they are configured."
				" BEWARE!\n");
			dev_warn(&pdev->dev, "For data safety, do not"
				" use sectors 8-9 on \"Legacy\" drives,"
				" and avoid the final two gigabytes on"
				" all RocketRAID BIOS initialized drives.\n");
		}
		fallthrough;
	case chip_6042:
		hpriv->ops = &mv6xxx_ops;
		hp_flags |= MV_HP_GEN_IIE;
		if (board_idx == chip_6042 && mv_pci_cut_through_okay(host))
			hp_flags |= MV_HP_CUT_THROUGH;

		switch (pdev->revision) {
		case 0x2: /* Rev.B0: the first/only public release */
			hp_flags |= MV_HP_ERRATA_60X1C0;
			break;
		default:
			dev_warn(&pdev->dev,
				 "Applying 60X1C0 workarounds to unknown rev\n");
			hp_flags |= MV_HP_ERRATA_60X1C0;
			break;
		}
		break;
	case chip_soc:
		if (soc_is_65n(hpriv))
			hpriv->ops = &mv_soc_65n_ops;
		else
			hpriv->ops = &mv_soc_ops;
		hp_flags |= MV_HP_FLAG_SOC | MV_HP_GEN_IIE |
			MV_HP_ERRATA_60X1C0;
		break;

	default:
		dev_alert(host->dev, "BUG: invalid board index %u\n", board_idx);
		return -EINVAL;
	}

	hpriv->hp_flags = hp_flags;
	if (hp_flags & MV_HP_PCIE) {
		hpriv->irq_cause_offset	= PCIE_IRQ_CAUSE;
		hpriv->irq_mask_offset	= PCIE_IRQ_MASK;
		hpriv->unmask_all_irqs	= PCIE_UNMASK_ALL_IRQS;
	} else {
		hpriv->irq_cause_offset	= PCI_IRQ_CAUSE;
		hpriv->irq_mask_offset	= PCI_IRQ_MASK;
		hpriv->unmask_all_irqs	= PCI_UNMASK_ALL_IRQS;
	}

	return 0;
}

/**
 *      mv_init_host - Perform some early initialization of the host.
 *	@host: ATA host to initialize
 *
 *      If possible, do an early global reset of the host.  Then do
 *      our port init and clear/unmask all/relevant host interrupts.
 *
 *      LOCKING:
 *      Inherited from caller.
 */
static int mv_init_host(struct ata_host *host)
{
	int rc = 0, n_hc, port, hc;
	struct mv_host_priv *hpriv = host->private_data;
	void __iomem *mmio = hpriv->base;

	rc = mv_chip_id(host, hpriv->board_idx);
	if (rc)
		goto done;

	if (IS_SOC(hpriv)) {
		hpriv->main_irq_cause_addr = mmio + SOC_HC_MAIN_IRQ_CAUSE;
		hpriv->main_irq_mask_addr  = mmio + SOC_HC_MAIN_IRQ_MASK;
	} else {
		hpriv->main_irq_cause_addr = mmio + PCI_HC_MAIN_IRQ_CAUSE;
		hpriv->main_irq_mask_addr  = mmio + PCI_HC_MAIN_IRQ_MASK;
	}

	/* initialize shadow irq mask with register's value */
	hpriv->main_irq_mask = readl(hpriv->main_irq_mask_addr);

	/* global interrupt mask: 0 == mask everything */
	mv_set_main_irq_mask(host, ~0, 0);

	n_hc = mv_get_hc_count(host->ports[0]->flags);

	for (port = 0; port < host->n_ports; port++)
		if (hpriv->ops->read_preamp)
			hpriv->ops->read_preamp(hpriv, port, mmio);

	rc = hpriv->ops->reset_hc(host, mmio, n_hc);
	if (rc)
		goto done;

	hpriv->ops->reset_flash(hpriv, mmio);
	hpriv->ops->reset_bus(host, mmio);
	hpriv->ops->enable_leds(hpriv, mmio);

	for (port = 0; port < host->n_ports; port++) {
		struct ata_port *ap = host->ports[port];
		void __iomem *port_mmio = mv_port_base(mmio, port);

		mv_port_init(&ap->ioaddr, port_mmio);
	}

	for (hc = 0; hc < n_hc; hc++) {
		void __iomem *hc_mmio = mv_hc_base(mmio, hc);

		dev_dbg(host->dev, "HC%i: HC config=0x%08x HC IRQ cause "
			"(before clear)=0x%08x\n", hc,
			readl(hc_mmio + HC_CFG),
			readl(hc_mmio + HC_IRQ_CAUSE));

		/* Clear any currently outstanding hc interrupt conditions */
		writelfl(0, hc_mmio + HC_IRQ_CAUSE);
	}

	if (!IS_SOC(hpriv)) {
		/* Clear any currently outstanding host interrupt conditions */
		writelfl(0, mmio + hpriv->irq_cause_offset);

		/* and unmask interrupt generation for host regs */
		writelfl(hpriv->unmask_all_irqs, mmio + hpriv->irq_mask_offset);
	}

	/*
	 * enable only global host interrupts for now.
	 * The per-port interrupts get done later as ports are set up.
	 */
	mv_set_main_irq_mask(host, 0, PCI_ERR);
	mv_set_irq_coalescing(host, irq_coalescing_io_count,
				    irq_coalescing_usecs);
done:
	return rc;
}

static int mv_create_dma_pools(struct mv_host_priv *hpriv, struct device *dev)
{
	hpriv->crqb_pool   = dmam_pool_create("crqb_q", dev, MV_CRQB_Q_SZ,
							     MV_CRQB_Q_SZ, 0);
	if (!hpriv->crqb_pool)
		return -ENOMEM;

	hpriv->crpb_pool   = dmam_pool_create("crpb_q", dev, MV_CRPB_Q_SZ,
							     MV_CRPB_Q_SZ, 0);
	if (!hpriv->crpb_pool)
		return -ENOMEM;

	hpriv->sg_tbl_pool = dmam_pool_create("sg_tbl", dev, MV_SG_TBL_SZ,
							     MV_SG_TBL_SZ, 0);
	if (!hpriv->sg_tbl_pool)
		return -ENOMEM;

	return 0;
}

static void mv_conf_mbus_windows(struct mv_host_priv *hpriv,
				 const struct mbus_dram_target_info *dram)
{
	int i;

	for (i = 0; i < 4; i++) {
		writel(0, hpriv->base + WINDOW_CTRL(i));
		writel(0, hpriv->base + WINDOW_BASE(i));
	}

	for (i = 0; i < dram->num_cs; i++) {
		const struct mbus_dram_window *cs = dram->cs + i;

		writel(((cs->size - 1) & 0xffff0000) |
			(cs->mbus_attr << 8) |
			(dram->mbus_dram_target_id << 4) | 1,
			hpriv->base + WINDOW_CTRL(i));
		writel(cs->base, hpriv->base + WINDOW_BASE(i));
	}
}

/**
 *      mv_platform_probe - handle a positive probe of an soc Marvell
 *      host
 *      @pdev: platform device found
 *
 *      LOCKING:
 *      Inherited from caller.
 */
static int mv_platform_probe(struct platform_device *pdev)
{
	const struct mv_sata_platform_data *mv_platform_data;
	const struct mbus_dram_target_info *dram;
	const struct ata_port_info *ppi[] =
	    { &mv_port_info[chip_soc], NULL };
	struct ata_host *host;
	struct mv_host_priv *hpriv;
	struct resource *res;
	int n_ports = 0, irq = 0;
	int rc;
	int port;

	ata_print_version_once(&pdev->dev, DRV_VERSION);

	/*
	 * Simple resource validation ..
	 */
	if (unlikely(pdev->num_resources != 2)) {
		dev_err(&pdev->dev, "invalid number of resources\n");
		return -EINVAL;
	}

	/*
	 * Get the register base first
	 */
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res == NULL)
		return -EINVAL;

	/* allocate host */
	if (pdev->dev.of_node) {
		rc = of_property_read_u32(pdev->dev.of_node, "nr-ports",
					   &n_ports);
		if (rc) {
			dev_err(&pdev->dev,
				"error parsing nr-ports property: %d\n", rc);
			return rc;
		}

		if (n_ports <= 0) {
			dev_err(&pdev->dev, "nr-ports must be positive: %d\n",
				n_ports);
			return -EINVAL;
		}

		irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
	} else {
		mv_platform_data = dev_get_platdata(&pdev->dev);
		n_ports = mv_platform_data->n_ports;
		irq = platform_get_irq(pdev, 0);
	}
	if (irq < 0)
		return irq;
	if (!irq)
		return -EINVAL;

	host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
	hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);

	if (!host || !hpriv)
		return -ENOMEM;
	hpriv->port_clks = devm_kcalloc(&pdev->dev,
					n_ports, sizeof(struct clk *),
					GFP_KERNEL);
	if (!hpriv->port_clks)
		return -ENOMEM;
	hpriv->port_phys = devm_kcalloc(&pdev->dev,
					n_ports, sizeof(struct phy *),
					GFP_KERNEL);
	if (!hpriv->port_phys)
		return -ENOMEM;
	host->private_data = hpriv;
	hpriv->board_idx = chip_soc;

	host->iomap = NULL;
	hpriv->base = devm_ioremap(&pdev->dev, res->start,
				   resource_size(res));
	if (!hpriv->base)
		return -ENOMEM;

	hpriv->base -= SATAHC0_REG_BASE;

	hpriv->clk = clk_get(&pdev->dev, NULL);
	if (IS_ERR(hpriv->clk))
		dev_notice(&pdev->dev, "cannot get optional clkdev\n");
	else
		clk_prepare_enable(hpriv->clk);

	for (port = 0; port < n_ports; port++) {
		char port_number[16];
		sprintf(port_number, "%d", port);
		hpriv->port_clks[port] = clk_get(&pdev->dev, port_number);
		if (!IS_ERR(hpriv->port_clks[port]))
			clk_prepare_enable(hpriv->port_clks[port]);

		sprintf(port_number, "port%d", port);
		hpriv->port_phys[port] = devm_phy_optional_get(&pdev->dev,
							       port_number);
		if (IS_ERR(hpriv->port_phys[port])) {
			rc = PTR_ERR(hpriv->port_phys[port]);
			hpriv->port_phys[port] = NULL;
			if (rc != -EPROBE_DEFER)
				dev_warn(&pdev->dev, "error getting phy %d", rc);

			/* Cleanup only the initialized ports */
			hpriv->n_ports = port;
			goto err;
		} else
			phy_power_on(hpriv->port_phys[port]);
	}

	/* All the ports have been initialized */
	hpriv->n_ports = n_ports;

	/*
	 * (Re-)program MBUS remapping windows if we are asked to.
	 */
	dram = mv_mbus_dram_info();
	if (dram)
		mv_conf_mbus_windows(hpriv, dram);

	rc = mv_create_dma_pools(hpriv, &pdev->dev);
	if (rc)
		goto err;

	/*
	 * To allow disk hotplug on Armada 370/XP SoCs, the PHY speed must be
	 * updated in the LP_PHY_CTL register.
	 */
	if (pdev->dev.of_node &&
		of_device_is_compatible(pdev->dev.of_node,
					"marvell,armada-370-sata"))
		hpriv->hp_flags |= MV_HP_FIX_LP_PHY_CTL;

	/* initialize adapter */
	rc = mv_init_host(host);
	if (rc)
		goto err;

	dev_info(&pdev->dev, "slots %u ports %d\n",
		 (unsigned)MV_MAX_Q_DEPTH, host->n_ports);

	rc = ata_host_activate(host, irq, mv_interrupt, IRQF_SHARED, &mv6_sht);
	if (!rc)
		return 0;

err:
	if (!IS_ERR(hpriv->clk)) {
		clk_disable_unprepare(hpriv->clk);
		clk_put(hpriv->clk);
	}
	for (port = 0; port < hpriv->n_ports; port++) {
		if (!IS_ERR(hpriv->port_clks[port])) {
			clk_disable_unprepare(hpriv->port_clks[port]);
			clk_put(hpriv->port_clks[port]);
		}
		phy_power_off(hpriv->port_phys[port]);
	}

	return rc;
}

/*
 *
 *      mv_platform_remove    -       unplug a platform interface
 *      @pdev: platform device
 *
 *      A platform bus SATA device has been unplugged. Perform the needed
 *      cleanup. Also called on module unload for any active devices.
 */
static int mv_platform_remove(struct platform_device *pdev)
{
	struct ata_host *host = platform_get_drvdata(pdev);
	struct mv_host_priv *hpriv = host->private_data;
	int port;
	ata_host_detach(host);

	if (!IS_ERR(hpriv->clk)) {
		clk_disable_unprepare(hpriv->clk);
		clk_put(hpriv->clk);
	}
	for (port = 0; port < host->n_ports; port++) {
		if (!IS_ERR(hpriv->port_clks[port])) {
			clk_disable_unprepare(hpriv->port_clks[port]);
			clk_put(hpriv->port_clks[port]);
		}
		phy_power_off(hpriv->port_phys[port]);
	}
	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int mv_platform_suspend(struct platform_device *pdev, pm_message_t state)
{
	struct ata_host *host = platform_get_drvdata(pdev);
	if (host)
		return ata_host_suspend(host, state);
	else
		return 0;
}

static int mv_platform_resume(struct platform_device *pdev)
{
	struct ata_host *host = platform_get_drvdata(pdev);
	const struct mbus_dram_target_info *dram;
	int ret;

	if (host) {
		struct mv_host_priv *hpriv = host->private_data;

		/*
		 * (Re-)program MBUS remapping windows if we are asked to.
		 */
		dram = mv_mbus_dram_info();
		if (dram)
			mv_conf_mbus_windows(hpriv, dram);

		/* initialize adapter */
		ret = mv_init_host(host);
		if (ret) {
			dev_err(&pdev->dev, "Error during HW init\n");
			return ret;
		}
		ata_host_resume(host);
	}

	return 0;
}
#else
#define mv_platform_suspend NULL
#define mv_platform_resume NULL
#endif

#ifdef CONFIG_OF
static const struct of_device_id mv_sata_dt_ids[] = {
	{ .compatible = "marvell,armada-370-sata", },
	{ .compatible = "marvell,orion-sata", },
	{},
};
MODULE_DEVICE_TABLE(of, mv_sata_dt_ids);
#endif

static struct platform_driver mv_platform_driver = {
	.probe		= mv_platform_probe,
	.remove		= mv_platform_remove,
	.suspend	= mv_platform_suspend,
	.resume		= mv_platform_resume,
	.driver		= {
		.name = DRV_NAME,
		.of_match_table = of_match_ptr(mv_sata_dt_ids),
	},
};


#ifdef CONFIG_PCI
static int mv_pci_init_one(struct pci_dev *pdev,
			   const struct pci_device_id *ent);
#ifdef CONFIG_PM_SLEEP
static int mv_pci_device_resume(struct pci_dev *pdev);
#endif


static struct pci_driver mv_pci_driver = {
	.name			= DRV_NAME,
	.id_table		= mv_pci_tbl,
	.probe			= mv_pci_init_one,
	.remove			= ata_pci_remove_one,
#ifdef CONFIG_PM_SLEEP
	.suspend		= ata_pci_device_suspend,
	.resume			= mv_pci_device_resume,
#endif

};

/**
 *      mv_print_info - Dump key info to kernel log for perusal.
 *      @host: ATA host to print info about
 *
 *      FIXME: complete this.
 *
 *      LOCKING:
 *      Inherited from caller.
 */
static void mv_print_info(struct ata_host *host)
{
	struct pci_dev *pdev = to_pci_dev(host->dev);
	struct mv_host_priv *hpriv = host->private_data;
	u8 scc;
	const char *scc_s, *gen;

	/* Use this to determine the HW stepping of the chip so we know
	 * what errata to workaround
	 */
	pci_read_config_byte(pdev, PCI_CLASS_DEVICE, &scc);
	if (scc == 0)
		scc_s = "SCSI";
	else if (scc == 0x01)
		scc_s = "RAID";
	else
		scc_s = "?";

	if (IS_GEN_I(hpriv))
		gen = "I";
	else if (IS_GEN_II(hpriv))
		gen = "II";
	else if (IS_GEN_IIE(hpriv))
		gen = "IIE";
	else
		gen = "?";

	dev_info(&pdev->dev, "Gen-%s %u slots %u ports %s mode IRQ via %s\n",
		 gen, (unsigned)MV_MAX_Q_DEPTH, host->n_ports,
		 scc_s, (MV_HP_FLAG_MSI & hpriv->hp_flags) ? "MSI" : "INTx");
}

/**
 *      mv_pci_init_one - handle a positive probe of a PCI Marvell host
 *      @pdev: PCI device found
 *      @ent: PCI device ID entry for the matched host
 *
 *      LOCKING:
 *      Inherited from caller.
 */
static int mv_pci_init_one(struct pci_dev *pdev,
			   const struct pci_device_id *ent)
{
	unsigned int board_idx = (unsigned int)ent->driver_data;
	const struct ata_port_info *ppi[] = { &mv_port_info[board_idx], NULL };
	struct ata_host *host;
	struct mv_host_priv *hpriv;
	int n_ports, port, rc;

	ata_print_version_once(&pdev->dev, DRV_VERSION);

	/* allocate host */
	n_ports = mv_get_hc_count(ppi[0]->flags) * MV_PORTS_PER_HC;

	host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
	hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
	if (!host || !hpriv)
		return -ENOMEM;
	host->private_data = hpriv;
	hpriv->n_ports = n_ports;
	hpriv->board_idx = board_idx;

	/* acquire resources */
	rc = pcim_enable_device(pdev);
	if (rc)
		return rc;

	rc = pcim_iomap_regions(pdev, 1 << MV_PRIMARY_BAR, DRV_NAME);
	if (rc == -EBUSY)
		pcim_pin_device(pdev);
	if (rc)
		return rc;
	host->iomap = pcim_iomap_table(pdev);
	hpriv->base = host->iomap[MV_PRIMARY_BAR];

	rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
	if (rc) {
		dev_err(&pdev->dev, "DMA enable failed\n");
		return rc;
	}

	rc = mv_create_dma_pools(hpriv, &pdev->dev);
	if (rc)
		return rc;

	for (port = 0; port < host->n_ports; port++) {
		struct ata_port *ap = host->ports[port];
		void __iomem *port_mmio = mv_port_base(hpriv->base, port);
		unsigned int offset = port_mmio - hpriv->base;

		ata_port_pbar_desc(ap, MV_PRIMARY_BAR, -1, "mmio");
		ata_port_pbar_desc(ap, MV_PRIMARY_BAR, offset, "port");
	}

	/* initialize adapter */
	rc = mv_init_host(host);
	if (rc)
		return rc;

	/* Enable message-switched interrupts, if requested */
	if (msi && pci_enable_msi(pdev) == 0)
		hpriv->hp_flags |= MV_HP_FLAG_MSI;

	mv_dump_pci_cfg(pdev, 0x68);
	mv_print_info(host);

	pci_set_master(pdev);
	pci_try_set_mwi(pdev);
	return ata_host_activate(host, pdev->irq, mv_interrupt, IRQF_SHARED,
				 IS_GEN_I(hpriv) ? &mv5_sht : &mv6_sht);
}

#ifdef CONFIG_PM_SLEEP
static int mv_pci_device_resume(struct pci_dev *pdev)
{
	struct ata_host *host = pci_get_drvdata(pdev);
	int rc;

	rc = ata_pci_device_do_resume(pdev);
	if (rc)
		return rc;

	/* initialize adapter */
	rc = mv_init_host(host);
	if (rc)
		return rc;

	ata_host_resume(host);

	return 0;
}
#endif
#endif

static int __init mv_init(void)
{
	int rc = -ENODEV;
#ifdef CONFIG_PCI
	rc = pci_register_driver(&mv_pci_driver);
	if (rc < 0)
		return rc;
#endif
	rc = platform_driver_register(&mv_platform_driver);

#ifdef CONFIG_PCI
	if (rc < 0)
		pci_unregister_driver(&mv_pci_driver);
#endif
	return rc;
}

static void __exit mv_exit(void)
{
#ifdef CONFIG_PCI
	pci_unregister_driver(&mv_pci_driver);
#endif
	platform_driver_unregister(&mv_platform_driver);
}

MODULE_AUTHOR("Brett Russ");
MODULE_DESCRIPTION("SCSI low-level driver for Marvell SATA controllers");
MODULE_LICENSE("GPL v2");
MODULE_DEVICE_TABLE(pci, mv_pci_tbl);
MODULE_VERSION(DRV_VERSION);
MODULE_ALIAS("platform:" DRV_NAME);

module_init(mv_init);
module_exit(mv_exit);