aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/via-velocity.c
blob: 5c4a92de9a076b703fd63708a3793311d8a5cbd1 (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
/*
 * This code is derived from the VIA reference driver (copyright message
 * below) provided to Red Hat by VIA Networking Technologies, Inc. for
 * addition to the Linux kernel.
 *
 * The code has been merged into one source file, cleaned up to follow
 * Linux coding style,  ported to the Linux 2.6 kernel tree and cleaned
 * for 64bit hardware platforms.
 *
 * TODO
 *	Big-endian support
 *	rx_copybreak/alignment
 *	Scatter gather
 *	More testing
 *
 * The changes are (c) Copyright 2004, Red Hat Inc. <alan@redhat.com>
 * Additional fixes and clean up: Francois Romieu
 *
 * This source has not been verified for use in safety critical systems.
 *
 * Please direct queries about the revamped driver to the linux-kernel
 * list not VIA.
 *
 * Original code:
 *
 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
 * All rights reserved.
 *
 * This software may be redistributed and/or modified under
 * the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
 * for more details.
 *
 * Author: Chuang Liang-Shing, AJ Jiang
 *
 * Date: Jan 24, 2003
 *
 * MODULE_LICENSE("GPL");
 *
 */


#include <linux/module.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/string.h>
#include <linux/wait.h>
#include <asm/io.h>
#include <linux/if.h>
#include <asm/uaccess.h>
#include <linux/proc_fs.h>
#include <linux/inetdevice.h>
#include <linux/reboot.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/in.h>
#include <linux/if_arp.h>
#include <linux/if_vlan.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/crc-ccitt.h>
#include <linux/crc32.h>

#include "via-velocity.h"


static int velocity_nics = 0;
static int msglevel = MSG_LEVEL_INFO;

/**
 *	mac_get_cam_mask	-	Read a CAM mask
 *	@regs: register block for this velocity
 *	@mask: buffer to store mask
 *
 *	Fetch the mask bits of the selected CAM and store them into the
 *	provided mask buffer.
 */

static void mac_get_cam_mask(struct mac_regs __iomem * regs, u8 * mask)
{
	int i;

	/* Select CAM mask */
	BYTE_REG_BITS_SET(CAMCR_PS_CAM_MASK, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);

	writeb(0, &regs->CAMADDR);

	/* read mask */
	for (i = 0; i < 8; i++)
		*mask++ = readb(&(regs->MARCAM[i]));

	/* disable CAMEN */
	writeb(0, &regs->CAMADDR);

	/* Select mar */
	BYTE_REG_BITS_SET(CAMCR_PS_MAR, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);

}


/**
 *	mac_set_cam_mask	-	Set a CAM mask
 *	@regs: register block for this velocity
 *	@mask: CAM mask to load
 *
 *	Store a new mask into a CAM
 */

static void mac_set_cam_mask(struct mac_regs __iomem * regs, u8 * mask)
{
	int i;
	/* Select CAM mask */
	BYTE_REG_BITS_SET(CAMCR_PS_CAM_MASK, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);

	writeb(CAMADDR_CAMEN, &regs->CAMADDR);

	for (i = 0; i < 8; i++) {
		writeb(*mask++, &(regs->MARCAM[i]));
	}
	/* disable CAMEN */
	writeb(0, &regs->CAMADDR);

	/* Select mar */
	BYTE_REG_BITS_SET(CAMCR_PS_MAR, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);
}

static void mac_set_vlan_cam_mask(struct mac_regs __iomem * regs, u8 * mask)
{
	int i;
	/* Select CAM mask */
	BYTE_REG_BITS_SET(CAMCR_PS_CAM_MASK, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);

	writeb(CAMADDR_CAMEN | CAMADDR_VCAMSL, &regs->CAMADDR);

	for (i = 0; i < 8; i++) {
		writeb(*mask++, &(regs->MARCAM[i]));
	}
	/* disable CAMEN */
	writeb(0, &regs->CAMADDR);

	/* Select mar */
	BYTE_REG_BITS_SET(CAMCR_PS_MAR, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);
}

/**
 *	mac_set_cam	-	set CAM data
 *	@regs: register block of this velocity
 *	@idx: Cam index
 *	@addr: 2 or 6 bytes of CAM data
 *
 *	Load an address or vlan tag into a CAM
 */

static void mac_set_cam(struct mac_regs __iomem * regs, int idx, const u8 *addr)
{
	int i;

	/* Select CAM mask */
	BYTE_REG_BITS_SET(CAMCR_PS_CAM_DATA, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);

	idx &= (64 - 1);

	writeb(CAMADDR_CAMEN | idx, &regs->CAMADDR);

	for (i = 0; i < 6; i++) {
		writeb(*addr++, &(regs->MARCAM[i]));
	}
	BYTE_REG_BITS_ON(CAMCR_CAMWR, &regs->CAMCR);

	udelay(10);

	writeb(0, &regs->CAMADDR);

	/* Select mar */
	BYTE_REG_BITS_SET(CAMCR_PS_MAR, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);
}

static void mac_set_vlan_cam(struct mac_regs __iomem * regs, int idx,
			     const u8 *addr)
{

	/* Select CAM mask */
	BYTE_REG_BITS_SET(CAMCR_PS_CAM_DATA, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);

	idx &= (64 - 1);

	writeb(CAMADDR_CAMEN | CAMADDR_VCAMSL | idx, &regs->CAMADDR);
	writew(*((u16 *) addr), &regs->MARCAM[0]);

	BYTE_REG_BITS_ON(CAMCR_CAMWR, &regs->CAMCR);

	udelay(10);

	writeb(0, &regs->CAMADDR);

	/* Select mar */
	BYTE_REG_BITS_SET(CAMCR_PS_MAR, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);
}


/**
 *	mac_wol_reset	-	reset WOL after exiting low power
 *	@regs: register block of this velocity
 *
 *	Called after we drop out of wake on lan mode in order to
 *	reset the Wake on lan features. This function doesn't restore
 *	the rest of the logic from the result of sleep/wakeup
 */

static void mac_wol_reset(struct mac_regs __iomem * regs)
{

	/* Turn off SWPTAG right after leaving power mode */
	BYTE_REG_BITS_OFF(STICKHW_SWPTAG, &regs->STICKHW);
	/* clear sticky bits */
	BYTE_REG_BITS_OFF((STICKHW_DS1 | STICKHW_DS0), &regs->STICKHW);

	BYTE_REG_BITS_OFF(CHIPGCR_FCGMII, &regs->CHIPGCR);
	BYTE_REG_BITS_OFF(CHIPGCR_FCMODE, &regs->CHIPGCR);
	/* disable force PME-enable */
	writeb(WOLCFG_PMEOVR, &regs->WOLCFGClr);
	/* disable power-event config bit */
	writew(0xFFFF, &regs->WOLCRClr);
	/* clear power status */
	writew(0xFFFF, &regs->WOLSRClr);
}

static int velocity_mii_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
static const struct ethtool_ops velocity_ethtool_ops;

/*
    Define module options
*/

MODULE_AUTHOR("VIA Networking Technologies, Inc.");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("VIA Networking Velocity Family Gigabit Ethernet Adapter Driver");

#define VELOCITY_PARAM(N,D) \
        static int N[MAX_UNITS]=OPTION_DEFAULT;\
	module_param_array(N, int, NULL, 0); \
        MODULE_PARM_DESC(N, D);

#define RX_DESC_MIN     64
#define RX_DESC_MAX     255
#define RX_DESC_DEF     64
VELOCITY_PARAM(RxDescriptors, "Number of receive descriptors");

#define TX_DESC_MIN     16
#define TX_DESC_MAX     256
#define TX_DESC_DEF     64
VELOCITY_PARAM(TxDescriptors, "Number of transmit descriptors");

#define RX_THRESH_MIN   0
#define RX_THRESH_MAX   3
#define RX_THRESH_DEF   0
/* rx_thresh[] is used for controlling the receive fifo threshold.
   0: indicate the rxfifo threshold is 128 bytes.
   1: indicate the rxfifo threshold is 512 bytes.
   2: indicate the rxfifo threshold is 1024 bytes.
   3: indicate the rxfifo threshold is store & forward.
*/
VELOCITY_PARAM(rx_thresh, "Receive fifo threshold");

#define DMA_LENGTH_MIN  0
#define DMA_LENGTH_MAX  7
#define DMA_LENGTH_DEF  0

/* DMA_length[] is used for controlling the DMA length
   0: 8 DWORDs
   1: 16 DWORDs
   2: 32 DWORDs
   3: 64 DWORDs
   4: 128 DWORDs
   5: 256 DWORDs
   6: SF(flush till emply)
   7: SF(flush till emply)
*/
VELOCITY_PARAM(DMA_length, "DMA length");

#define IP_ALIG_DEF     0
/* IP_byte_align[] is used for IP header DWORD byte aligned
   0: indicate the IP header won't be DWORD byte aligned.(Default) .
   1: indicate the IP header will be DWORD byte aligned.
      In some enviroment, the IP header should be DWORD byte aligned,
      or the packet will be droped when we receive it. (eg: IPVS)
*/
VELOCITY_PARAM(IP_byte_align, "Enable IP header dword aligned");

#define TX_CSUM_DEF     1
/* txcsum_offload[] is used for setting the checksum offload ability of NIC.
   (We only support RX checksum offload now)
   0: disable csum_offload[checksum offload
   1: enable checksum offload. (Default)
*/
VELOCITY_PARAM(txcsum_offload, "Enable transmit packet checksum offload");

#define FLOW_CNTL_DEF   1
#define FLOW_CNTL_MIN   1
#define FLOW_CNTL_MAX   5

/* flow_control[] is used for setting the flow control ability of NIC.
   1: hardware deafult - AUTO (default). Use Hardware default value in ANAR.
   2: enable TX flow control.
   3: enable RX flow control.
   4: enable RX/TX flow control.
   5: disable
*/
VELOCITY_PARAM(flow_control, "Enable flow control ability");

#define MED_LNK_DEF 0
#define MED_LNK_MIN 0
#define MED_LNK_MAX 4
/* speed_duplex[] is used for setting the speed and duplex mode of NIC.
   0: indicate autonegotiation for both speed and duplex mode
   1: indicate 100Mbps half duplex mode
   2: indicate 100Mbps full duplex mode
   3: indicate 10Mbps half duplex mode
   4: indicate 10Mbps full duplex mode

   Note:
        if EEPROM have been set to the force mode, this option is ignored
            by driver.
*/
VELOCITY_PARAM(speed_duplex, "Setting the speed and duplex mode");

#define VAL_PKT_LEN_DEF     0
/* ValPktLen[] is used for setting the checksum offload ability of NIC.
   0: Receive frame with invalid layer 2 length (Default)
   1: Drop frame with invalid layer 2 length
*/
VELOCITY_PARAM(ValPktLen, "Receiving or Drop invalid 802.3 frame");

#define WOL_OPT_DEF     0
#define WOL_OPT_MIN     0
#define WOL_OPT_MAX     7
/* wol_opts[] is used for controlling wake on lan behavior.
   0: Wake up if recevied a magic packet. (Default)
   1: Wake up if link status is on/off.
   2: Wake up if recevied an arp packet.
   4: Wake up if recevied any unicast packet.
   Those value can be sumed up to support more than one option.
*/
VELOCITY_PARAM(wol_opts, "Wake On Lan options");

#define INT_WORKS_DEF   20
#define INT_WORKS_MIN   10
#define INT_WORKS_MAX   64

VELOCITY_PARAM(int_works, "Number of packets per interrupt services");

static int rx_copybreak = 200;
module_param(rx_copybreak, int, 0644);
MODULE_PARM_DESC(rx_copybreak, "Copy breakpoint for copy-only-tiny-frames");

static void velocity_init_info(struct pci_dev *pdev, struct velocity_info *vptr,
			       const struct velocity_info_tbl *info);
static int velocity_get_pci_info(struct velocity_info *, struct pci_dev *pdev);
static void velocity_print_info(struct velocity_info *vptr);
static int velocity_open(struct net_device *dev);
static int velocity_change_mtu(struct net_device *dev, int mtu);
static int velocity_xmit(struct sk_buff *skb, struct net_device *dev);
static int velocity_intr(int irq, void *dev_instance);
static void velocity_set_multi(struct net_device *dev);
static struct net_device_stats *velocity_get_stats(struct net_device *dev);
static int velocity_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
static int velocity_close(struct net_device *dev);
static int velocity_receive_frame(struct velocity_info *, int idx);
static int velocity_alloc_rx_buf(struct velocity_info *, int idx);
static void velocity_free_rd_ring(struct velocity_info *vptr);
static void velocity_free_tx_buf(struct velocity_info *vptr, struct velocity_td_info *);
static int velocity_soft_reset(struct velocity_info *vptr);
static void mii_init(struct velocity_info *vptr, u32 mii_status);
static u32 velocity_get_link(struct net_device *dev);
static u32 velocity_get_opt_media_mode(struct velocity_info *vptr);
static void velocity_print_link_status(struct velocity_info *vptr);
static void safe_disable_mii_autopoll(struct mac_regs __iomem * regs);
static void velocity_shutdown(struct velocity_info *vptr);
static void enable_flow_control_ability(struct velocity_info *vptr);
static void enable_mii_autopoll(struct mac_regs __iomem * regs);
static int velocity_mii_read(struct mac_regs __iomem *, u8 byIdx, u16 * pdata);
static int velocity_mii_write(struct mac_regs __iomem *, u8 byMiiAddr, u16 data);
static u32 mii_check_media_mode(struct mac_regs __iomem * regs);
static u32 check_connection_type(struct mac_regs __iomem * regs);
static int velocity_set_media_mode(struct velocity_info *vptr, u32 mii_status);

#ifdef CONFIG_PM

static int velocity_suspend(struct pci_dev *pdev, pm_message_t state);
static int velocity_resume(struct pci_dev *pdev);

static DEFINE_SPINLOCK(velocity_dev_list_lock);
static LIST_HEAD(velocity_dev_list);

#endif

#if defined(CONFIG_PM) && defined(CONFIG_INET)

static int velocity_netdev_event(struct notifier_block *nb, unsigned long notification, void *ptr);

static struct notifier_block velocity_inetaddr_notifier = {
      .notifier_call	= velocity_netdev_event,
};

static void velocity_register_notifier(void)
{
	register_inetaddr_notifier(&velocity_inetaddr_notifier);
}

static void velocity_unregister_notifier(void)
{
	unregister_inetaddr_notifier(&velocity_inetaddr_notifier);
}

#else

#define velocity_register_notifier()	do {} while (0)
#define velocity_unregister_notifier()	do {} while (0)

#endif

/*
 *	Internal board variants. At the moment we have only one
 */

static const struct velocity_info_tbl chip_info_table[] __devinitdata = {
	{CHIP_TYPE_VT6110, "VIA Networking Velocity Family Gigabit Ethernet Adapter", 1, 0x00FFFFFFUL},
	{ }
};

/*
 *	Describe the PCI device identifiers that we support in this
 *	device driver. Used for hotplug autoloading.
 */

static const struct pci_device_id velocity_id_table[] __devinitdata = {
	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_612X) },
	{ }
};

MODULE_DEVICE_TABLE(pci, velocity_id_table);

/**
 *	get_chip_name	- 	identifier to name
 *	@id: chip identifier
 *
 *	Given a chip identifier return a suitable description. Returns
 *	a pointer a static string valid while the driver is loaded.
 */

static const char __devinit *get_chip_name(enum chip_type chip_id)
{
	int i;
	for (i = 0; chip_info_table[i].name != NULL; i++)
		if (chip_info_table[i].chip_id == chip_id)
			break;
	return chip_info_table[i].name;
}

/**
 *	velocity_remove1	-	device unplug
 *	@pdev: PCI device being removed
 *
 *	Device unload callback. Called on an unplug or on module
 *	unload for each active device that is present. Disconnects
 *	the device from the network layer and frees all the resources
 */

static void __devexit velocity_remove1(struct pci_dev *pdev)
{
	struct net_device *dev = pci_get_drvdata(pdev);
	struct velocity_info *vptr = netdev_priv(dev);

#ifdef CONFIG_PM
	unsigned long flags;

	spin_lock_irqsave(&velocity_dev_list_lock, flags);
	if (!list_empty(&velocity_dev_list))
		list_del(&vptr->list);
	spin_unlock_irqrestore(&velocity_dev_list_lock, flags);
#endif
	unregister_netdev(dev);
	iounmap(vptr->mac_regs);
	pci_release_regions(pdev);
	pci_disable_device(pdev);
	pci_set_drvdata(pdev, NULL);
	free_netdev(dev);

	velocity_nics--;
}

/**
 *	velocity_set_int_opt	-	parser for integer options
 *	@opt: pointer to option value
 *	@val: value the user requested (or -1 for default)
 *	@min: lowest value allowed
 *	@max: highest value allowed
 *	@def: default value
 *	@name: property name
 *	@dev: device name
 *
 *	Set an integer property in the module options. This function does
 *	all the verification and checking as well as reporting so that
 *	we don't duplicate code for each option.
 */

static void __devinit velocity_set_int_opt(int *opt, int val, int min, int max, int def, char *name, char *devname)
{
	if (val == -1)
		*opt = def;
	else if (val < min || val > max) {
		VELOCITY_PRT(MSG_LEVEL_INFO, KERN_NOTICE "%s: the value of parameter %s is invalid, the valid range is (%d-%d)\n",
					devname, name, min, max);
		*opt = def;
	} else {
		VELOCITY_PRT(MSG_LEVEL_INFO, KERN_INFO "%s: set value of parameter %s to %d\n",
					devname, name, val);
		*opt = val;
	}
}

/**
 *	velocity_set_bool_opt	-	parser for boolean options
 *	@opt: pointer to option value
 *	@val: value the user requested (or -1 for default)
 *	@def: default value (yes/no)
 *	@flag: numeric value to set for true.
 *	@name: property name
 *	@dev: device name
 *
 *	Set a boolean property in the module options. This function does
 *	all the verification and checking as well as reporting so that
 *	we don't duplicate code for each option.
 */

static void __devinit velocity_set_bool_opt(u32 * opt, int val, int def, u32 flag, char *name, char *devname)
{
	(*opt) &= (~flag);
	if (val == -1)
		*opt |= (def ? flag : 0);
	else if (val < 0 || val > 1) {
		printk(KERN_NOTICE "%s: the value of parameter %s is invalid, the valid range is (0-1)\n",
			devname, name);
		*opt |= (def ? flag : 0);
	} else {
		printk(KERN_INFO "%s: set parameter %s to %s\n",
			devname, name, val ? "TRUE" : "FALSE");
		*opt |= (val ? flag : 0);
	}
}

/**
 *	velocity_get_options	-	set options on device
 *	@opts: option structure for the device
 *	@index: index of option to use in module options array
 *	@devname: device name
 *
 *	Turn the module and command options into a single structure
 *	for the current device
 */

static void __devinit velocity_get_options(struct velocity_opt *opts, int index, char *devname)
{

	velocity_set_int_opt(&opts->rx_thresh, rx_thresh[index], RX_THRESH_MIN, RX_THRESH_MAX, RX_THRESH_DEF, "rx_thresh", devname);
	velocity_set_int_opt(&opts->DMA_length, DMA_length[index], DMA_LENGTH_MIN, DMA_LENGTH_MAX, DMA_LENGTH_DEF, "DMA_length", devname);
	velocity_set_int_opt(&opts->numrx, RxDescriptors[index], RX_DESC_MIN, RX_DESC_MAX, RX_DESC_DEF, "RxDescriptors", devname);
	velocity_set_int_opt(&opts->numtx, TxDescriptors[index], TX_DESC_MIN, TX_DESC_MAX, TX_DESC_DEF, "TxDescriptors", devname);

	velocity_set_bool_opt(&opts->flags, txcsum_offload[index], TX_CSUM_DEF, VELOCITY_FLAGS_TX_CSUM, "txcsum_offload", devname);
	velocity_set_int_opt(&opts->flow_cntl, flow_control[index], FLOW_CNTL_MIN, FLOW_CNTL_MAX, FLOW_CNTL_DEF, "flow_control", devname);
	velocity_set_bool_opt(&opts->flags, IP_byte_align[index], IP_ALIG_DEF, VELOCITY_FLAGS_IP_ALIGN, "IP_byte_align", devname);
	velocity_set_bool_opt(&opts->flags, ValPktLen[index], VAL_PKT_LEN_DEF, VELOCITY_FLAGS_VAL_PKT_LEN, "ValPktLen", devname);
	velocity_set_int_opt((int *) &opts->spd_dpx, speed_duplex[index], MED_LNK_MIN, MED_LNK_MAX, MED_LNK_DEF, "Media link mode", devname);
	velocity_set_int_opt((int *) &opts->wol_opts, wol_opts[index], WOL_OPT_MIN, WOL_OPT_MAX, WOL_OPT_DEF, "Wake On Lan options", devname);
	velocity_set_int_opt((int *) &opts->int_works, int_works[index], INT_WORKS_MIN, INT_WORKS_MAX, INT_WORKS_DEF, "Interrupt service works", devname);
	opts->numrx = (opts->numrx & ~3);
}

/**
 *	velocity_init_cam_filter	-	initialise CAM
 *	@vptr: velocity to program
 *
 *	Initialize the content addressable memory used for filters. Load
 *	appropriately according to the presence of VLAN
 */

static void velocity_init_cam_filter(struct velocity_info *vptr)
{
	struct mac_regs __iomem * regs = vptr->mac_regs;
	unsigned short vid;

	/* Turn on MCFG_PQEN, turn off MCFG_RTGOPT */
	WORD_REG_BITS_SET(MCFG_PQEN, MCFG_RTGOPT, &regs->MCFG);
	WORD_REG_BITS_ON(MCFG_VIDFR, &regs->MCFG);

	/* Disable all CAMs */
	memset(vptr->vCAMmask, 0, sizeof(u8) * 8);
	memset(vptr->mCAMmask, 0, sizeof(u8) * 8);
	mac_set_vlan_cam_mask(regs, vptr->vCAMmask);
	mac_set_cam_mask(regs, vptr->mCAMmask);

	/* Enable first VCAM */
	if (vptr->vlgrp) {
		for (vid = 0; vid < VLAN_VID_MASK; vid++) {
			if (vlan_group_get_device(vptr->vlgrp, vid)) {
				/* If Tagging option is enabled and
				   VLAN ID is not zero, then
				   turn on MCFG_RTGOPT also */
				if (vid != 0)
					WORD_REG_BITS_ON(MCFG_RTGOPT, &regs->MCFG);

				mac_set_vlan_cam(regs, 0, (u8 *) &vid);
			}
		}
		vptr->vCAMmask[0] |= 1;
		mac_set_vlan_cam_mask(regs, vptr->vCAMmask);
	} else {
		u16 temp = 0;
		mac_set_vlan_cam(regs, 0, (u8 *) &temp);
		temp = 1;
		mac_set_vlan_cam_mask(regs, (u8 *) &temp);
	}
}

static void velocity_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
{
	struct velocity_info *vptr = netdev_priv(dev);

        spin_lock_irq(&vptr->lock);
	velocity_init_cam_filter(vptr);
        spin_unlock_irq(&vptr->lock);
}

static void velocity_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
{
	struct velocity_info *vptr = netdev_priv(dev);

        spin_lock_irq(&vptr->lock);
	vlan_group_set_device(vptr->vlgrp, vid, NULL);
	velocity_init_cam_filter(vptr);
        spin_unlock_irq(&vptr->lock);
}


/**
 *	velocity_rx_reset	-	handle a receive reset
 *	@vptr: velocity we are resetting
 *
 *	Reset the ownership and status for the receive ring side.
 *	Hand all the receive queue to the NIC.
 */

static void velocity_rx_reset(struct velocity_info *vptr)
{

	struct mac_regs __iomem * regs = vptr->mac_regs;
	int i;

	vptr->rd_dirty = vptr->rd_filled = vptr->rd_curr = 0;

	/*
	 *	Init state, all RD entries belong to the NIC
	 */
	for (i = 0; i < vptr->options.numrx; ++i)
		vptr->rd_ring[i].rdesc0.owner = OWNED_BY_NIC;

	writew(vptr->options.numrx, &regs->RBRDU);
	writel(vptr->rd_pool_dma, &regs->RDBaseLo);
	writew(0, &regs->RDIdx);
	writew(vptr->options.numrx - 1, &regs->RDCSize);
}

/**
 *	velocity_init_registers	-	initialise MAC registers
 *	@vptr: velocity to init
 *	@type: type of initialisation (hot or cold)
 *
 *	Initialise the MAC on a reset or on first set up on the
 *	hardware.
 */

static void velocity_init_registers(struct velocity_info *vptr,
				    enum velocity_init_type type)
{
	struct mac_regs __iomem * regs = vptr->mac_regs;
	int i, mii_status;

	mac_wol_reset(regs);

	switch (type) {
	case VELOCITY_INIT_RESET:
	case VELOCITY_INIT_WOL:

		netif_stop_queue(vptr->dev);

		/*
		 *	Reset RX to prevent RX pointer not on the 4X location
		 */
		velocity_rx_reset(vptr);
		mac_rx_queue_run(regs);
		mac_rx_queue_wake(regs);

		mii_status = velocity_get_opt_media_mode(vptr);
		if (velocity_set_media_mode(vptr, mii_status) != VELOCITY_LINK_CHANGE) {
			velocity_print_link_status(vptr);
			if (!(vptr->mii_status & VELOCITY_LINK_FAIL))
				netif_wake_queue(vptr->dev);
		}

		enable_flow_control_ability(vptr);

		mac_clear_isr(regs);
		writel(CR0_STOP, &regs->CR0Clr);
		writel((CR0_DPOLL | CR0_TXON | CR0_RXON | CR0_STRT),
							&regs->CR0Set);

		break;

	case VELOCITY_INIT_COLD:
	default:
		/*
		 *	Do reset
		 */
		velocity_soft_reset(vptr);
		mdelay(5);

		mac_eeprom_reload(regs);
		for (i = 0; i < 6; i++) {
			writeb(vptr->dev->dev_addr[i], &(regs->PAR[i]));
		}
		/*
		 *	clear Pre_ACPI bit.
		 */
		BYTE_REG_BITS_OFF(CFGA_PACPI, &(regs->CFGA));
		mac_set_rx_thresh(regs, vptr->options.rx_thresh);
		mac_set_dma_length(regs, vptr->options.DMA_length);

		writeb(WOLCFG_SAM | WOLCFG_SAB, &regs->WOLCFGSet);
		/*
		 *	Back off algorithm use original IEEE standard
		 */
		BYTE_REG_BITS_SET(CFGB_OFSET, (CFGB_CRANDOM | CFGB_CAP | CFGB_MBA | CFGB_BAKOPT), &regs->CFGB);

		/*
		 *	Init CAM filter
		 */
		velocity_init_cam_filter(vptr);

		/*
		 *	Set packet filter: Receive directed and broadcast address
		 */
		velocity_set_multi(vptr->dev);

		/*
		 *	Enable MII auto-polling
		 */
		enable_mii_autopoll(regs);

		vptr->int_mask = INT_MASK_DEF;

		writel(cpu_to_le32(vptr->rd_pool_dma), &regs->RDBaseLo);
		writew(vptr->options.numrx - 1, &regs->RDCSize);
		mac_rx_queue_run(regs);
		mac_rx_queue_wake(regs);

		writew(vptr->options.numtx - 1, &regs->TDCSize);

		for (i = 0; i < vptr->num_txq; i++) {
			writel(cpu_to_le32(vptr->td_pool_dma[i]), &(regs->TDBaseLo[i]));
			mac_tx_queue_run(regs, i);
		}

		init_flow_control_register(vptr);

		writel(CR0_STOP, &regs->CR0Clr);
		writel((CR0_DPOLL | CR0_TXON | CR0_RXON | CR0_STRT), &regs->CR0Set);

		mii_status = velocity_get_opt_media_mode(vptr);
		netif_stop_queue(vptr->dev);

		mii_init(vptr, mii_status);

		if (velocity_set_media_mode(vptr, mii_status) != VELOCITY_LINK_CHANGE) {
			velocity_print_link_status(vptr);
			if (!(vptr->mii_status & VELOCITY_LINK_FAIL))
				netif_wake_queue(vptr->dev);
		}

		enable_flow_control_ability(vptr);
		mac_hw_mibs_init(regs);
		mac_write_int_mask(vptr->int_mask, regs);
		mac_clear_isr(regs);

	}
}

/**
 *	velocity_soft_reset	-	soft reset
 *	@vptr: velocity to reset
 *
 *	Kick off a soft reset of the velocity adapter and then poll
 *	until the reset sequence has completed before returning.
 */

static int velocity_soft_reset(struct velocity_info *vptr)
{
	struct mac_regs __iomem * regs = vptr->mac_regs;
	int i = 0;

	writel(CR0_SFRST, &regs->CR0Set);

	for (i = 0; i < W_MAX_TIMEOUT; i++) {
		udelay(5);
		if (!DWORD_REG_BITS_IS_ON(CR0_SFRST, &regs->CR0Set))
			break;
	}

	if (i == W_MAX_TIMEOUT) {
		writel(CR0_FORSRST, &regs->CR0Set);
		/* FIXME: PCI POSTING */
		/* delay 2ms */
		mdelay(2);
	}
	return 0;
}

/**
 *	velocity_found1		-	set up discovered velocity card
 *	@pdev: PCI device
 *	@ent: PCI device table entry that matched
 *
 *	Configure a discovered adapter from scratch. Return a negative
 *	errno error code on failure paths.
 */

static int __devinit velocity_found1(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	static int first = 1;
	struct net_device *dev;
	int i;
	const struct velocity_info_tbl *info = &chip_info_table[ent->driver_data];
	struct velocity_info *vptr;
	struct mac_regs __iomem * regs;
	int ret = -ENOMEM;

	/* FIXME: this driver, like almost all other ethernet drivers,
	 * can support more than MAX_UNITS.
	 */
	if (velocity_nics >= MAX_UNITS) {
		dev_notice(&pdev->dev, "already found %d NICs.\n",
			   velocity_nics);
		return -ENODEV;
	}

	dev = alloc_etherdev(sizeof(struct velocity_info));
	if (!dev) {
		dev_err(&pdev->dev, "allocate net device failed.\n");
		goto out;
	}

	/* Chain it all together */

	SET_NETDEV_DEV(dev, &pdev->dev);
	vptr = netdev_priv(dev);


	if (first) {
		printk(KERN_INFO "%s Ver. %s\n",
			VELOCITY_FULL_DRV_NAM, VELOCITY_VERSION);
		printk(KERN_INFO "Copyright (c) 2002, 2003 VIA Networking Technologies, Inc.\n");
		printk(KERN_INFO "Copyright (c) 2004 Red Hat Inc.\n");
		first = 0;
	}

	velocity_init_info(pdev, vptr, info);

	vptr->dev = dev;

	dev->irq = pdev->irq;

	ret = pci_enable_device(pdev);
	if (ret < 0)
		goto err_free_dev;

	ret = velocity_get_pci_info(vptr, pdev);
	if (ret < 0) {
		/* error message already printed */
		goto err_disable;
	}

	ret = pci_request_regions(pdev, VELOCITY_NAME);
	if (ret < 0) {
		dev_err(&pdev->dev, "No PCI resources.\n");
		goto err_disable;
	}

	regs = ioremap(vptr->memaddr, VELOCITY_IO_SIZE);
	if (regs == NULL) {
		ret = -EIO;
		goto err_release_res;
	}

	vptr->mac_regs = regs;

	mac_wol_reset(regs);

	dev->base_addr = vptr->ioaddr;

	for (i = 0; i < 6; i++)
		dev->dev_addr[i] = readb(&regs->PAR[i]);


	velocity_get_options(&vptr->options, velocity_nics, dev->name);

	/*
	 *	Mask out the options cannot be set to the chip
	 */

	vptr->options.flags &= info->flags;

	/*
	 *	Enable the chip specified capbilities
	 */

	vptr->flags = vptr->options.flags | (info->flags & 0xFF000000UL);

	vptr->wol_opts = vptr->options.wol_opts;
	vptr->flags |= VELOCITY_FLAGS_WOL_ENABLED;

	vptr->phy_id = MII_GET_PHY_ID(vptr->mac_regs);

	dev->irq = pdev->irq;
	dev->open = velocity_open;
	dev->hard_start_xmit = velocity_xmit;
	dev->stop = velocity_close;
	dev->get_stats = velocity_get_stats;
	dev->set_multicast_list = velocity_set_multi;
	dev->do_ioctl = velocity_ioctl;
	dev->ethtool_ops = &velocity_ethtool_ops;
	dev->change_mtu = velocity_change_mtu;

	dev->vlan_rx_add_vid = velocity_vlan_rx_add_vid;
	dev->vlan_rx_kill_vid = velocity_vlan_rx_kill_vid;

#ifdef  VELOCITY_ZERO_COPY_SUPPORT
	dev->features |= NETIF_F_SG;
#endif
	dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_FILTER;

	if (vptr->flags & VELOCITY_FLAGS_TX_CSUM)
		dev->features |= NETIF_F_IP_CSUM;

	ret = register_netdev(dev);
	if (ret < 0)
		goto err_iounmap;

	if (velocity_get_link(dev))
		netif_carrier_off(dev);

	velocity_print_info(vptr);
	pci_set_drvdata(pdev, dev);

	/* and leave the chip powered down */

	pci_set_power_state(pdev, PCI_D3hot);
#ifdef CONFIG_PM
	{
		unsigned long flags;

		spin_lock_irqsave(&velocity_dev_list_lock, flags);
		list_add(&vptr->list, &velocity_dev_list);
		spin_unlock_irqrestore(&velocity_dev_list_lock, flags);
	}
#endif
	velocity_nics++;
out:
	return ret;

err_iounmap:
	iounmap(regs);
err_release_res:
	pci_release_regions(pdev);
err_disable:
	pci_disable_device(pdev);
err_free_dev:
	free_netdev(dev);
	goto out;
}

/**
 *	velocity_print_info	-	per driver data
 *	@vptr: velocity
 *
 *	Print per driver data as the kernel driver finds Velocity
 *	hardware
 */

static void __devinit velocity_print_info(struct velocity_info *vptr)
{
	struct net_device *dev = vptr->dev;

	printk(KERN_INFO "%s: %s\n", dev->name, get_chip_name(vptr->chip_id));
	printk(KERN_INFO "%s: Ethernet Address: %2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X\n",
		dev->name,
		dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
		dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
}

/**
 *	velocity_init_info	-	init private data
 *	@pdev: PCI device
 *	@vptr: Velocity info
 *	@info: Board type
 *
 *	Set up the initial velocity_info struct for the device that has been
 *	discovered.
 */

static void __devinit velocity_init_info(struct pci_dev *pdev,
					 struct velocity_info *vptr,
					 const struct velocity_info_tbl *info)
{
	memset(vptr, 0, sizeof(struct velocity_info));

	vptr->pdev = pdev;
	vptr->chip_id = info->chip_id;
	vptr->num_txq = info->txqueue;
	vptr->multicast_limit = MCAM_SIZE;
	spin_lock_init(&vptr->lock);
	INIT_LIST_HEAD(&vptr->list);
}

/**
 *	velocity_get_pci_info	-	retrieve PCI info for device
 *	@vptr: velocity device
 *	@pdev: PCI device it matches
 *
 *	Retrieve the PCI configuration space data that interests us from
 *	the kernel PCI layer
 */

static int __devinit velocity_get_pci_info(struct velocity_info *vptr, struct pci_dev *pdev)
{
	vptr->rev_id = pdev->revision;

	pci_set_master(pdev);

	vptr->ioaddr = pci_resource_start(pdev, 0);
	vptr->memaddr = pci_resource_start(pdev, 1);

	if (!(pci_resource_flags(pdev, 0) & IORESOURCE_IO)) {
		dev_err(&pdev->dev,
			   "region #0 is not an I/O resource, aborting.\n");
		return -EINVAL;
	}

	if ((pci_resource_flags(pdev, 1) & IORESOURCE_IO)) {
		dev_err(&pdev->dev,
			   "region #1 is an I/O resource, aborting.\n");
		return -EINVAL;
	}

	if (pci_resource_len(pdev, 1) < VELOCITY_IO_SIZE) {
		dev_err(&pdev->dev, "region #1 is too small.\n");
		return -EINVAL;
	}
	vptr->pdev = pdev;

	return 0;
}

/**
 *	velocity_init_rings	-	set up DMA rings
 *	@vptr: Velocity to set up
 *
 *	Allocate PCI mapped DMA rings for the receive and transmit layer
 *	to use.
 */

static int velocity_init_rings(struct velocity_info *vptr)
{
	int i;
	unsigned int psize;
	unsigned int tsize;
	dma_addr_t pool_dma;
	u8 *pool;

	/*
	 *	Allocate all RD/TD rings a single pool
	 */

	psize = vptr->options.numrx * sizeof(struct rx_desc) +
		vptr->options.numtx * sizeof(struct tx_desc) * vptr->num_txq;

	/*
	 * pci_alloc_consistent() fulfills the requirement for 64 bytes
	 * alignment
	 */
	pool = pci_alloc_consistent(vptr->pdev, psize, &pool_dma);

	if (pool == NULL) {
		printk(KERN_ERR "%s : DMA memory allocation failed.\n",
					vptr->dev->name);
		return -ENOMEM;
	}

	memset(pool, 0, psize);

	vptr->rd_ring = (struct rx_desc *) pool;

	vptr->rd_pool_dma = pool_dma;

	tsize = vptr->options.numtx * PKT_BUF_SZ * vptr->num_txq;
	vptr->tx_bufs = pci_alloc_consistent(vptr->pdev, tsize,
						&vptr->tx_bufs_dma);

	if (vptr->tx_bufs == NULL) {
		printk(KERN_ERR "%s: DMA memory allocation failed.\n",
					vptr->dev->name);
		pci_free_consistent(vptr->pdev, psize, pool, pool_dma);
		return -ENOMEM;
	}

	memset(vptr->tx_bufs, 0, vptr->options.numtx * PKT_BUF_SZ * vptr->num_txq);

	i = vptr->options.numrx * sizeof(struct rx_desc);
	pool += i;
	pool_dma += i;
	for (i = 0; i < vptr->num_txq; i++) {
		int offset = vptr->options.numtx * sizeof(struct tx_desc);

		vptr->td_pool_dma[i] = pool_dma;
		vptr->td_rings[i] = (struct tx_desc *) pool;
		pool += offset;
		pool_dma += offset;
	}
	return 0;
}

/**
 *	velocity_free_rings	-	free PCI ring pointers
 *	@vptr: Velocity to free from
 *
 *	Clean up the PCI ring buffers allocated to this velocity.
 */

static void velocity_free_rings(struct velocity_info *vptr)
{
	int size;

	size = vptr->options.numrx * sizeof(struct rx_desc) +
	       vptr->options.numtx * sizeof(struct tx_desc) * vptr->num_txq;

	pci_free_consistent(vptr->pdev, size, vptr->rd_ring, vptr->rd_pool_dma);

	size = vptr->options.numtx * PKT_BUF_SZ * vptr->num_txq;

	pci_free_consistent(vptr->pdev, size, vptr->tx_bufs, vptr->tx_bufs_dma);
}

static inline void velocity_give_many_rx_descs(struct velocity_info *vptr)
{
	struct mac_regs __iomem *regs = vptr->mac_regs;
	int avail, dirty, unusable;

	/*
	 * RD number must be equal to 4X per hardware spec
	 * (programming guide rev 1.20, p.13)
	 */
	if (vptr->rd_filled < 4)
		return;

	wmb();

	unusable = vptr->rd_filled & 0x0003;
	dirty = vptr->rd_dirty - unusable;
	for (avail = vptr->rd_filled & 0xfffc; avail; avail--) {
		dirty = (dirty > 0) ? dirty - 1 : vptr->options.numrx - 1;
		vptr->rd_ring[dirty].rdesc0.owner = OWNED_BY_NIC;
	}

	writew(vptr->rd_filled & 0xfffc, &regs->RBRDU);
	vptr->rd_filled = unusable;
}

static int velocity_rx_refill(struct velocity_info *vptr)
{
	int dirty = vptr->rd_dirty, done = 0, ret = 0;

	do {
		struct rx_desc *rd = vptr->rd_ring + dirty;

		/* Fine for an all zero Rx desc at init time as well */
		if (rd->rdesc0.owner == OWNED_BY_NIC)
			break;

		if (!vptr->rd_info[dirty].skb) {
			ret = velocity_alloc_rx_buf(vptr, dirty);
			if (ret < 0)
				break;
		}
		done++;
		dirty = (dirty < vptr->options.numrx - 1) ? dirty + 1 : 0;
	} while (dirty != vptr->rd_curr);

	if (done) {
		vptr->rd_dirty = dirty;
		vptr->rd_filled += done;
		velocity_give_many_rx_descs(vptr);
	}

	return ret;
}

/**
 *	velocity_init_rd_ring	-	set up receive ring
 *	@vptr: velocity to configure
 *
 *	Allocate and set up the receive buffers for each ring slot and
 *	assign them to the network adapter.
 */

static int velocity_init_rd_ring(struct velocity_info *vptr)
{
	int ret;

	vptr->rd_info = kcalloc(vptr->options.numrx,
				sizeof(struct velocity_rd_info), GFP_KERNEL);
	if (!vptr->rd_info)
		return -ENOMEM;

	vptr->rd_filled = vptr->rd_dirty = vptr->rd_curr = 0;

	ret = velocity_rx_refill(vptr);
	if (ret < 0) {
		VELOCITY_PRT(MSG_LEVEL_ERR, KERN_ERR
			"%s: failed to allocate RX buffer.\n", vptr->dev->name);
		velocity_free_rd_ring(vptr);
	}

	return ret;
}

/**
 *	velocity_free_rd_ring	-	free receive ring
 *	@vptr: velocity to clean up
 *
 *	Free the receive buffers for each ring slot and any
 *	attached socket buffers that need to go away.
 */

static void velocity_free_rd_ring(struct velocity_info *vptr)
{
	int i;

	if (vptr->rd_info == NULL)
		return;

	for (i = 0; i < vptr->options.numrx; i++) {
		struct velocity_rd_info *rd_info = &(vptr->rd_info[i]);
		struct rx_desc *rd = vptr->rd_ring + i;

		memset(rd, 0, sizeof(*rd));

		if (!rd_info->skb)
			continue;
		pci_unmap_single(vptr->pdev, rd_info->skb_dma, vptr->rx_buf_sz,
				 PCI_DMA_FROMDEVICE);
		rd_info->skb_dma = (dma_addr_t) NULL;

		dev_kfree_skb(rd_info->skb);
		rd_info->skb = NULL;
	}

	kfree(vptr->rd_info);
	vptr->rd_info = NULL;
}

/**
 *	velocity_init_td_ring	-	set up transmit ring
 *	@vptr:	velocity
 *
 *	Set up the transmit ring and chain the ring pointers together.
 *	Returns zero on success or a negative posix errno code for
 *	failure.
 */

static int velocity_init_td_ring(struct velocity_info *vptr)
{
	int i, j;
	dma_addr_t curr;
	struct tx_desc *td;
	struct velocity_td_info *td_info;

	/* Init the TD ring entries */
	for (j = 0; j < vptr->num_txq; j++) {
		curr = vptr->td_pool_dma[j];

		vptr->td_infos[j] = kcalloc(vptr->options.numtx,
					    sizeof(struct velocity_td_info),
					    GFP_KERNEL);
		if (!vptr->td_infos[j])	{
			while(--j >= 0)
				kfree(vptr->td_infos[j]);
			return -ENOMEM;
		}

		for (i = 0; i < vptr->options.numtx; i++, curr += sizeof(struct tx_desc)) {
			td = &(vptr->td_rings[j][i]);
			td_info = &(vptr->td_infos[j][i]);
			td_info->buf = vptr->tx_bufs +
				(j * vptr->options.numtx + i) * PKT_BUF_SZ;
			td_info->buf_dma = vptr->tx_bufs_dma +
				(j * vptr->options.numtx + i) * PKT_BUF_SZ;
		}
		vptr->td_tail[j] = vptr->td_curr[j] = vptr->td_used[j] = 0;
	}
	return 0;
}

/*
 *	FIXME: could we merge this with velocity_free_tx_buf ?
 */

static void velocity_free_td_ring_entry(struct velocity_info *vptr,
							 int q, int n)
{
	struct velocity_td_info * td_info = &(vptr->td_infos[q][n]);
	int i;

	if (td_info == NULL)
		return;

	if (td_info->skb) {
		for (i = 0; i < td_info->nskb_dma; i++)
		{
			if (td_info->skb_dma[i]) {
				pci_unmap_single(vptr->pdev, td_info->skb_dma[i],
					td_info->skb->len, PCI_DMA_TODEVICE);
				td_info->skb_dma[i] = (dma_addr_t) NULL;
			}
		}
		dev_kfree_skb(td_info->skb);
		td_info->skb = NULL;
	}
}

/**
 *	velocity_free_td_ring	-	free td ring
 *	@vptr: velocity
 *
 *	Free up the transmit ring for this particular velocity adapter.
 *	We free the ring contents but not the ring itself.
 */

static void velocity_free_td_ring(struct velocity_info *vptr)
{
	int i, j;

	for (j = 0; j < vptr->num_txq; j++) {
		if (vptr->td_infos[j] == NULL)
			continue;
		for (i = 0; i < vptr->options.numtx; i++) {
			velocity_free_td_ring_entry(vptr, j, i);

		}
		kfree(vptr->td_infos[j]);
		vptr->td_infos[j] = NULL;
	}
}

/**
 *	velocity_rx_srv		-	service RX interrupt
 *	@vptr: velocity
 *	@status: adapter status (unused)
 *
 *	Walk the receive ring of the velocity adapter and remove
 *	any received packets from the receive queue. Hand the ring
 *	slots back to the adapter for reuse.
 */

static int velocity_rx_srv(struct velocity_info *vptr, int status)
{
	struct net_device_stats *stats = &vptr->stats;
	int rd_curr = vptr->rd_curr;
	int works = 0;

	do {
		struct rx_desc *rd = vptr->rd_ring + rd_curr;

		if (!vptr->rd_info[rd_curr].skb)
			break;

		if (rd->rdesc0.owner == OWNED_BY_NIC)
			break;

		rmb();

		/*
		 *	Don't drop CE or RL error frame although RXOK is off
		 */
		if ((rd->rdesc0.RSR & RSR_RXOK) || (!(rd->rdesc0.RSR & RSR_RXOK) && (rd->rdesc0.RSR & (RSR_CE | RSR_RL)))) {
			if (velocity_receive_frame(vptr, rd_curr) < 0)
				stats->rx_dropped++;
		} else {
			if (rd->rdesc0.RSR & RSR_CRC)
				stats->rx_crc_errors++;
			if (rd->rdesc0.RSR & RSR_FAE)
				stats->rx_frame_errors++;

			stats->rx_dropped++;
		}

		rd->inten = 1;

		vptr->dev->last_rx = jiffies;

		rd_curr++;
		if (rd_curr >= vptr->options.numrx)
			rd_curr = 0;
	} while (++works <= 15);

	vptr->rd_curr = rd_curr;

	if (works > 0 && velocity_rx_refill(vptr) < 0) {
		VELOCITY_PRT(MSG_LEVEL_ERR, KERN_ERR
			"%s: rx buf allocation failure\n", vptr->dev->name);
	}

	VAR_USED(stats);
	return works;
}

/**
 *	velocity_rx_csum	-	checksum process
 *	@rd: receive packet descriptor
 *	@skb: network layer packet buffer
 *
 *	Process the status bits for the received packet and determine
 *	if the checksum was computed and verified by the hardware
 */

static inline void velocity_rx_csum(struct rx_desc *rd, struct sk_buff *skb)
{
	skb->ip_summed = CHECKSUM_NONE;

	if (rd->rdesc1.CSM & CSM_IPKT) {
		if (rd->rdesc1.CSM & CSM_IPOK) {
			if ((rd->rdesc1.CSM & CSM_TCPKT) ||
					(rd->rdesc1.CSM & CSM_UDPKT)) {
				if (!(rd->rdesc1.CSM & CSM_TUPOK)) {
					return;
				}
			}
			skb->ip_summed = CHECKSUM_UNNECESSARY;
		}
	}
}

/**
 *	velocity_rx_copy	-	in place Rx copy for small packets
 *	@rx_skb: network layer packet buffer candidate
 *	@pkt_size: received data size
 *	@rd: receive packet descriptor
 *	@dev: network device
 *
 *	Replace the current skb that is scheduled for Rx processing by a
 *	shorter, immediatly allocated skb, if the received packet is small
 *	enough. This function returns a negative value if the received
 *	packet is too big or if memory is exhausted.
 */
static inline int velocity_rx_copy(struct sk_buff **rx_skb, int pkt_size,
				   struct velocity_info *vptr)
{
	int ret = -1;

	if (pkt_size < rx_copybreak) {
		struct sk_buff *new_skb;

		new_skb = dev_alloc_skb(pkt_size + 2);
		if (new_skb) {
			new_skb->dev = vptr->dev;
			new_skb->ip_summed = rx_skb[0]->ip_summed;

			if (vptr->flags & VELOCITY_FLAGS_IP_ALIGN)
				skb_reserve(new_skb, 2);

			skb_copy_from_linear_data(rx_skb[0], new_skb->data,
						  pkt_size);
			*rx_skb = new_skb;
			ret = 0;
		}

	}
	return ret;
}

/**
 *	velocity_iph_realign	-	IP header alignment
 *	@vptr: velocity we are handling
 *	@skb: network layer packet buffer
 *	@pkt_size: received data size
 *
 *	Align IP header on a 2 bytes boundary. This behavior can be
 *	configured by the user.
 */
static inline void velocity_iph_realign(struct velocity_info *vptr,
					struct sk_buff *skb, int pkt_size)
{
	/* FIXME - memmove ? */
	if (vptr->flags & VELOCITY_FLAGS_IP_ALIGN) {
		int i;

		for (i = pkt_size; i >= 0; i--)
			*(skb->data + i + 2) = *(skb->data + i);
		skb_reserve(skb, 2);
	}
}

/**
 *	velocity_receive_frame	-	received packet processor
 *	@vptr: velocity we are handling
 *	@idx: ring index
 *
 *	A packet has arrived. We process the packet and if appropriate
 *	pass the frame up the network stack
 */

static int velocity_receive_frame(struct velocity_info *vptr, int idx)
{
	void (*pci_action)(struct pci_dev *, dma_addr_t, size_t, int);
	struct net_device_stats *stats = &vptr->stats;
	struct velocity_rd_info *rd_info = &(vptr->rd_info[idx]);
	struct rx_desc *rd = &(vptr->rd_ring[idx]);
	int pkt_len = rd->rdesc0.len;
	struct sk_buff *skb;

	if (rd->rdesc0.RSR & (RSR_STP | RSR_EDP)) {
		VELOCITY_PRT(MSG_LEVEL_VERBOSE, KERN_ERR " %s : the received frame span multple RDs.\n", vptr->dev->name);
		stats->rx_length_errors++;
		return -EINVAL;
	}

	if (rd->rdesc0.RSR & RSR_MAR)
		vptr->stats.multicast++;

	skb = rd_info->skb;

	pci_dma_sync_single_for_cpu(vptr->pdev, rd_info->skb_dma,
				    vptr->rx_buf_sz, PCI_DMA_FROMDEVICE);

	/*
	 *	Drop frame not meeting IEEE 802.3
	 */

	if (vptr->flags & VELOCITY_FLAGS_VAL_PKT_LEN) {
		if (rd->rdesc0.RSR & RSR_RL) {
			stats->rx_length_errors++;
			return -EINVAL;
		}
	}

	pci_action = pci_dma_sync_single_for_device;

	velocity_rx_csum(rd, skb);

	if (velocity_rx_copy(&skb, pkt_len, vptr) < 0) {
		velocity_iph_realign(vptr, skb, pkt_len);
		pci_action = pci_unmap_single;
		rd_info->skb = NULL;
	}

	pci_action(vptr->pdev, rd_info->skb_dma, vptr->rx_buf_sz,
		   PCI_DMA_FROMDEVICE);

	skb_put(skb, pkt_len - 4);
	skb->protocol = eth_type_trans(skb, vptr->dev);

	stats->rx_bytes += pkt_len;
	netif_rx(skb);

	return 0;
}

/**
 *	velocity_alloc_rx_buf	-	allocate aligned receive buffer
 *	@vptr: velocity
 *	@idx: ring index
 *
 *	Allocate a new full sized buffer for the reception of a frame and
 *	map it into PCI space for the hardware to use. The hardware
 *	requires *64* byte alignment of the buffer which makes life
 *	less fun than would be ideal.
 */

static int velocity_alloc_rx_buf(struct velocity_info *vptr, int idx)
{
	struct rx_desc *rd = &(vptr->rd_ring[idx]);
	struct velocity_rd_info *rd_info = &(vptr->rd_info[idx]);

	rd_info->skb = dev_alloc_skb(vptr->rx_buf_sz + 64);
	if (rd_info->skb == NULL)
		return -ENOMEM;

	/*
	 *	Do the gymnastics to get the buffer head for data at
	 *	64byte alignment.
	 */
	skb_reserve(rd_info->skb, (unsigned long) rd_info->skb->data & 63);
	rd_info->skb->dev = vptr->dev;
	rd_info->skb_dma = pci_map_single(vptr->pdev, rd_info->skb->data, vptr->rx_buf_sz, PCI_DMA_FROMDEVICE);

	/*
	 *	Fill in the descriptor to match
 	 */

	*((u32 *) & (rd->rdesc0)) = 0;
	rd->len = cpu_to_le32(vptr->rx_buf_sz);
	rd->inten = 1;
	rd->pa_low = cpu_to_le32(rd_info->skb_dma);
	rd->pa_high = 0;
	return 0;
}

/**
 *	tx_srv		-	transmit interrupt service
 *	@vptr; Velocity
 *	@status:
 *
 *	Scan the queues looking for transmitted packets that
 *	we can complete and clean up. Update any statistics as
 *	necessary/
 */

static int velocity_tx_srv(struct velocity_info *vptr, u32 status)
{
	struct tx_desc *td;
	int qnum;
	int full = 0;
	int idx;
	int works = 0;
	struct velocity_td_info *tdinfo;
	struct net_device_stats *stats = &vptr->stats;

	for (qnum = 0; qnum < vptr->num_txq; qnum++) {
		for (idx = vptr->td_tail[qnum]; vptr->td_used[qnum] > 0;
			idx = (idx + 1) % vptr->options.numtx) {

			/*
			 *	Get Tx Descriptor
			 */
			td = &(vptr->td_rings[qnum][idx]);
			tdinfo = &(vptr->td_infos[qnum][idx]);

			if (td->tdesc0.owner == OWNED_BY_NIC)
				break;

			if ((works++ > 15))
				break;

			if (td->tdesc0.TSR & TSR0_TERR) {
				stats->tx_errors++;
				stats->tx_dropped++;
				if (td->tdesc0.TSR & TSR0_CDH)
					stats->tx_heartbeat_errors++;
				if (td->tdesc0.TSR & TSR0_CRS)
					stats->tx_carrier_errors++;
				if (td->tdesc0.TSR & TSR0_ABT)
					stats->tx_aborted_errors++;
				if (td->tdesc0.TSR & TSR0_OWC)
					stats->tx_window_errors++;
			} else {
				stats->tx_packets++;
				stats->tx_bytes += tdinfo->skb->len;
			}
			velocity_free_tx_buf(vptr, tdinfo);
			vptr->td_used[qnum]--;
		}
		vptr->td_tail[qnum] = idx;

		if (AVAIL_TD(vptr, qnum) < 1) {
			full = 1;
		}
	}
	/*
	 *	Look to see if we should kick the transmit network
	 *	layer for more work.
	 */
	if (netif_queue_stopped(vptr->dev) && (full == 0)
	    && (!(vptr->mii_status & VELOCITY_LINK_FAIL))) {
		netif_wake_queue(vptr->dev);
	}
	return works;
}

/**
 *	velocity_print_link_status	-	link status reporting
 *	@vptr: velocity to report on
 *
 *	Turn the link status of the velocity card into a kernel log
 *	description of the new link state, detailing speed and duplex
 *	status
 */

static void velocity_print_link_status(struct velocity_info *vptr)
{

	if (vptr->mii_status & VELOCITY_LINK_FAIL) {
		VELOCITY_PRT(MSG_LEVEL_INFO, KERN_NOTICE "%s: failed to detect cable link\n", vptr->dev->name);
	} else if (vptr->options.spd_dpx == SPD_DPX_AUTO) {
		VELOCITY_PRT(MSG_LEVEL_INFO, KERN_NOTICE "%s: Link auto-negotiation", vptr->dev->name);

		if (vptr->mii_status & VELOCITY_SPEED_1000)
			VELOCITY_PRT(MSG_LEVEL_INFO, " speed 1000M bps");
		else if (vptr->mii_status & VELOCITY_SPEED_100)
			VELOCITY_PRT(MSG_LEVEL_INFO, " speed 100M bps");
		else
			VELOCITY_PRT(MSG_LEVEL_INFO, " speed 10M bps");

		if (vptr->mii_status & VELOCITY_DUPLEX_FULL)
			VELOCITY_PRT(MSG_LEVEL_INFO, " full duplex\n");
		else
			VELOCITY_PRT(MSG_LEVEL_INFO, " half duplex\n");
	} else {
		VELOCITY_PRT(MSG_LEVEL_INFO, KERN_NOTICE "%s: Link forced", vptr->dev->name);
		switch (vptr->options.spd_dpx) {
		case SPD_DPX_100_HALF:
			VELOCITY_PRT(MSG_LEVEL_INFO, " speed 100M bps half duplex\n");
			break;
		case SPD_DPX_100_FULL:
			VELOCITY_PRT(MSG_LEVEL_INFO, " speed 100M bps full duplex\n");
			break;
		case SPD_DPX_10_HALF:
			VELOCITY_PRT(MSG_LEVEL_INFO, " speed 10M bps half duplex\n");
			break;
		case SPD_DPX_10_FULL:
			VELOCITY_PRT(MSG_LEVEL_INFO, " speed 10M bps full duplex\n");
			break;
		default:
			break;
		}
	}
}

/**
 *	velocity_error	-	handle error from controller
 *	@vptr: velocity
 *	@status: card status
 *
 *	Process an error report from the hardware and attempt to recover
 *	the card itself. At the moment we cannot recover from some
 *	theoretically impossible errors but this could be fixed using
 *	the pci_device_failed logic to bounce the hardware
 *
 */

static void velocity_error(struct velocity_info *vptr, int status)
{

	if (status & ISR_TXSTLI) {
		struct mac_regs __iomem * regs = vptr->mac_regs;

		printk(KERN_ERR "TD structure error TDindex=%hx\n", readw(&regs->TDIdx[0]));
		BYTE_REG_BITS_ON(TXESR_TDSTR, &regs->TXESR);
		writew(TRDCSR_RUN, &regs->TDCSRClr);
		netif_stop_queue(vptr->dev);

		/* FIXME: port over the pci_device_failed code and use it
		   here */
	}

	if (status & ISR_SRCI) {
		struct mac_regs __iomem * regs = vptr->mac_regs;
		int linked;

		if (vptr->options.spd_dpx == SPD_DPX_AUTO) {
			vptr->mii_status = check_connection_type(regs);

			/*
			 *	If it is a 3119, disable frame bursting in
			 *	halfduplex mode and enable it in fullduplex
			 *	 mode
			 */
			if (vptr->rev_id < REV_ID_VT3216_A0) {
				if (vptr->mii_status | VELOCITY_DUPLEX_FULL)
					BYTE_REG_BITS_ON(TCR_TB2BDIS, &regs->TCR);
				else
					BYTE_REG_BITS_OFF(TCR_TB2BDIS, &regs->TCR);
			}
			/*
			 *	Only enable CD heart beat counter in 10HD mode
			 */
			if (!(vptr->mii_status & VELOCITY_DUPLEX_FULL) && (vptr->mii_status & VELOCITY_SPEED_10)) {
				BYTE_REG_BITS_OFF(TESTCFG_HBDIS, &regs->TESTCFG);
			} else {
				BYTE_REG_BITS_ON(TESTCFG_HBDIS, &regs->TESTCFG);
			}
		}
		/*
		 *	Get link status from PHYSR0
		 */
		linked = readb(&regs->PHYSR0) & PHYSR0_LINKGD;

		if (linked) {
			vptr->mii_status &= ~VELOCITY_LINK_FAIL;
			netif_carrier_on(vptr->dev);
		} else {
			vptr->mii_status |= VELOCITY_LINK_FAIL;
			netif_carrier_off(vptr->dev);
		}

		velocity_print_link_status(vptr);
		enable_flow_control_ability(vptr);

		/*
		 *	Re-enable auto-polling because SRCI will disable
		 *	auto-polling
		 */

		enable_mii_autopoll(regs);

		if (vptr->mii_status & VELOCITY_LINK_FAIL)
			netif_stop_queue(vptr->dev);
		else
			netif_wake_queue(vptr->dev);

	};
	if (status & ISR_MIBFI)
		velocity_update_hw_mibs(vptr);
	if (status & ISR_LSTEI)
		mac_rx_queue_wake(vptr->mac_regs);
}

/**
 *	velocity_free_tx_buf	-	free transmit buffer
 *	@vptr: velocity
 *	@tdinfo: buffer
 *
 *	Release an transmit buffer. If the buffer was preallocated then
 *	recycle it, if not then unmap the buffer.
 */

static void velocity_free_tx_buf(struct velocity_info *vptr, struct velocity_td_info *tdinfo)
{
	struct sk_buff *skb = tdinfo->skb;
	int i;

	/*
	 *	Don't unmap the pre-allocated tx_bufs
	 */
	if (tdinfo->skb_dma && (tdinfo->skb_dma[0] != tdinfo->buf_dma)) {

		for (i = 0; i < tdinfo->nskb_dma; i++) {
#ifdef VELOCITY_ZERO_COPY_SUPPORT
			pci_unmap_single(vptr->pdev, tdinfo->skb_dma[i], td->tdesc1.len, PCI_DMA_TODEVICE);
#else
			pci_unmap_single(vptr->pdev, tdinfo->skb_dma[i], skb->len, PCI_DMA_TODEVICE);
#endif
			tdinfo->skb_dma[i] = 0;
		}
	}
	dev_kfree_skb_irq(skb);
	tdinfo->skb = NULL;
}

/**
 *	velocity_open		-	interface activation callback
 *	@dev: network layer device to open
 *
 *	Called when the network layer brings the interface up. Returns
 *	a negative posix error code on failure, or zero on success.
 *
 *	All the ring allocation and set up is done on open for this
 *	adapter to minimise memory usage when inactive
 */

static int velocity_open(struct net_device *dev)
{
	struct velocity_info *vptr = netdev_priv(dev);
	int ret;

	vptr->rx_buf_sz = (dev->mtu <= 1504 ? PKT_BUF_SZ : dev->mtu + 32);

	ret = velocity_init_rings(vptr);
	if (ret < 0)
		goto out;

	ret = velocity_init_rd_ring(vptr);
	if (ret < 0)
		goto err_free_desc_rings;

	ret = velocity_init_td_ring(vptr);
	if (ret < 0)
		goto err_free_rd_ring;

	/* Ensure chip is running */
	pci_set_power_state(vptr->pdev, PCI_D0);

	velocity_init_registers(vptr, VELOCITY_INIT_COLD);

	ret = request_irq(vptr->pdev->irq, &velocity_intr, IRQF_SHARED,
			  dev->name, dev);
	if (ret < 0) {
		/* Power down the chip */
		pci_set_power_state(vptr->pdev, PCI_D3hot);
		goto err_free_td_ring;
	}

	mac_enable_int(vptr->mac_regs);
	netif_start_queue(dev);
	vptr->flags |= VELOCITY_FLAGS_OPENED;
out:
	return ret;

err_free_td_ring:
	velocity_free_td_ring(vptr);
err_free_rd_ring:
	velocity_free_rd_ring(vptr);
err_free_desc_rings:
	velocity_free_rings(vptr);
	goto out;
}

/**
 *	velocity_change_mtu	-	MTU change callback
 *	@dev: network device
 *	@new_mtu: desired MTU
 *
 *	Handle requests from the networking layer for MTU change on
 *	this interface. It gets called on a change by the network layer.
 *	Return zero for success or negative posix error code.
 */

static int velocity_change_mtu(struct net_device *dev, int new_mtu)
{
	struct velocity_info *vptr = netdev_priv(dev);
	unsigned long flags;
	int oldmtu = dev->mtu;
	int ret = 0;

	if ((new_mtu < VELOCITY_MIN_MTU) || new_mtu > (VELOCITY_MAX_MTU)) {
		VELOCITY_PRT(MSG_LEVEL_ERR, KERN_NOTICE "%s: Invalid MTU.\n",
				vptr->dev->name);
		return -EINVAL;
	}

	if (new_mtu != oldmtu) {
		spin_lock_irqsave(&vptr->lock, flags);

		netif_stop_queue(dev);
		velocity_shutdown(vptr);

		velocity_free_td_ring(vptr);
		velocity_free_rd_ring(vptr);

		dev->mtu = new_mtu;
		if (new_mtu > 8192)
			vptr->rx_buf_sz = 9 * 1024;
		else if (new_mtu > 4096)
			vptr->rx_buf_sz = 8192;
		else
			vptr->rx_buf_sz = 4 * 1024;

		ret = velocity_init_rd_ring(vptr);
		if (ret < 0)
			goto out_unlock;

		ret = velocity_init_td_ring(vptr);
		if (ret < 0)
			goto out_unlock;

		velocity_init_registers(vptr, VELOCITY_INIT_COLD);

		mac_enable_int(vptr->mac_regs);
		netif_start_queue(dev);
out_unlock:
		spin_unlock_irqrestore(&vptr->lock, flags);
	}

	return ret;
}

/**
 *	velocity_shutdown	-	shut down the chip
 *	@vptr: velocity to deactivate
 *
 *	Shuts down the internal operations of the velocity and
 *	disables interrupts, autopolling, transmit and receive
 */

static void velocity_shutdown(struct velocity_info *vptr)
{
	struct mac_regs __iomem * regs = vptr->mac_regs;
	mac_disable_int(regs);
	writel(CR0_STOP, &regs->CR0Set);
	writew(0xFFFF, &regs->TDCSRClr);
	writeb(0xFF, &regs->RDCSRClr);
	safe_disable_mii_autopoll(regs);
	mac_clear_isr(regs);
}

/**
 *	velocity_close		-	close adapter callback
 *	@dev: network device
 *
 *	Callback from the network layer when the velocity is being
 *	deactivated by the network layer
 */

static int velocity_close(struct net_device *dev)
{
	struct velocity_info *vptr = netdev_priv(dev);

	netif_stop_queue(dev);
	velocity_shutdown(vptr);

	if (vptr->flags & VELOCITY_FLAGS_WOL_ENABLED)
		velocity_get_ip(vptr);
	if (dev->irq != 0)
		free_irq(dev->irq, dev);

	/* Power down the chip */
	pci_set_power_state(vptr->pdev, PCI_D3hot);

	/* Free the resources */
	velocity_free_td_ring(vptr);
	velocity_free_rd_ring(vptr);
	velocity_free_rings(vptr);

	vptr->flags &= (~VELOCITY_FLAGS_OPENED);
	return 0;
}

/**
 *	velocity_xmit		-	transmit packet callback
 *	@skb: buffer to transmit
 *	@dev: network device
 *
 *	Called by the networ layer to request a packet is queued to
 *	the velocity. Returns zero on success.
 */

static int velocity_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct velocity_info *vptr = netdev_priv(dev);
	int qnum = 0;
	struct tx_desc *td_ptr;
	struct velocity_td_info *tdinfo;
	unsigned long flags;
	int index;

	int pktlen = skb->len;

#ifdef VELOCITY_ZERO_COPY_SUPPORT
	if (skb_shinfo(skb)->nr_frags > 6 && __skb_linearize(skb)) {
		kfree_skb(skb);
		return 0;
	}
#endif

	spin_lock_irqsave(&vptr->lock, flags);

	index = vptr->td_curr[qnum];
	td_ptr = &(vptr->td_rings[qnum][index]);
	tdinfo = &(vptr->td_infos[qnum][index]);

	td_ptr->tdesc1.TCPLS = TCPLS_NORMAL;
	td_ptr->tdesc1.TCR = TCR0_TIC;
	td_ptr->td_buf[0].queue = 0;

	/*
	 *	Pad short frames.
	 */
	if (pktlen < ETH_ZLEN) {
		/* Cannot occur until ZC support */
		pktlen = ETH_ZLEN;
		skb_copy_from_linear_data(skb, tdinfo->buf, skb->len);
		memset(tdinfo->buf + skb->len, 0, ETH_ZLEN - skb->len);
		tdinfo->skb = skb;
		tdinfo->skb_dma[0] = tdinfo->buf_dma;
		td_ptr->tdesc0.pktsize = pktlen;
		td_ptr->td_buf[0].pa_low = cpu_to_le32(tdinfo->skb_dma[0]);
		td_ptr->td_buf[0].pa_high = 0;
		td_ptr->td_buf[0].bufsize = td_ptr->tdesc0.pktsize;
		tdinfo->nskb_dma = 1;
		td_ptr->tdesc1.CMDZ = 2;
	} else
#ifdef VELOCITY_ZERO_COPY_SUPPORT
	if (skb_shinfo(skb)->nr_frags > 0) {
		int nfrags = skb_shinfo(skb)->nr_frags;
		tdinfo->skb = skb;
		if (nfrags > 6) {
			skb_copy_from_linear_data(skb, tdinfo->buf, skb->len);
			tdinfo->skb_dma[0] = tdinfo->buf_dma;
			td_ptr->tdesc0.pktsize =
			td_ptr->td_buf[0].pa_low = cpu_to_le32(tdinfo->skb_dma[0]);
			td_ptr->td_buf[0].pa_high = 0;
			td_ptr->td_buf[0].bufsize = td_ptr->tdesc0.pktsize;
			tdinfo->nskb_dma = 1;
			td_ptr->tdesc1.CMDZ = 2;
		} else {
			int i = 0;
			tdinfo->nskb_dma = 0;
			tdinfo->skb_dma[i] = pci_map_single(vptr->pdev, skb->data, skb->len - skb->data_len, PCI_DMA_TODEVICE);

			td_ptr->tdesc0.pktsize = pktlen;

			/* FIXME: support 48bit DMA later */
			td_ptr->td_buf[i].pa_low = cpu_to_le32(tdinfo->skb_dma);
			td_ptr->td_buf[i].pa_high = 0;
			td_ptr->td_buf[i].bufsize = skb->len->skb->data_len;

			for (i = 0; i < nfrags; i++) {
				skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
				void *addr = ((void *) page_address(frag->page + frag->page_offset));

				tdinfo->skb_dma[i + 1] = pci_map_single(vptr->pdev, addr, frag->size, PCI_DMA_TODEVICE);

				td_ptr->td_buf[i + 1].pa_low = cpu_to_le32(tdinfo->skb_dma[i + 1]);
				td_ptr->td_buf[i + 1].pa_high = 0;
				td_ptr->td_buf[i + 1].bufsize = frag->size;
			}
			tdinfo->nskb_dma = i - 1;
			td_ptr->tdesc1.CMDZ = i;
		}

	} else
#endif
	{
		/*
		 *	Map the linear network buffer into PCI space and
		 *	add it to the transmit ring.
		 */
		tdinfo->skb = skb;
		tdinfo->skb_dma[0] = pci_map_single(vptr->pdev, skb->data, pktlen, PCI_DMA_TODEVICE);
		td_ptr->tdesc0.pktsize = pktlen;
		td_ptr->td_buf[0].pa_low = cpu_to_le32(tdinfo->skb_dma[0]);
		td_ptr->td_buf[0].pa_high = 0;
		td_ptr->td_buf[0].bufsize = td_ptr->tdesc0.pktsize;
		tdinfo->nskb_dma = 1;
		td_ptr->tdesc1.CMDZ = 2;
	}

	if (vptr->vlgrp && vlan_tx_tag_present(skb)) {
		td_ptr->tdesc1.pqinf.VID = vlan_tx_tag_get(skb);
		td_ptr->tdesc1.pqinf.priority = 0;
		td_ptr->tdesc1.pqinf.CFI = 0;
		td_ptr->tdesc1.TCR |= TCR0_VETAG;
	}

	/*
	 *	Handle hardware checksum
	 */
	if ((vptr->flags & VELOCITY_FLAGS_TX_CSUM)
				 && (skb->ip_summed == CHECKSUM_PARTIAL)) {
		const struct iphdr *ip = ip_hdr(skb);
		if (ip->protocol == IPPROTO_TCP)
			td_ptr->tdesc1.TCR |= TCR0_TCPCK;
		else if (ip->protocol == IPPROTO_UDP)
			td_ptr->tdesc1.TCR |= (TCR0_UDPCK);
		td_ptr->tdesc1.TCR |= TCR0_IPCK;
	}
	{

		int prev = index - 1;

		if (prev < 0)
			prev = vptr->options.numtx - 1;
		td_ptr->tdesc0.owner = OWNED_BY_NIC;
		vptr->td_used[qnum]++;
		vptr->td_curr[qnum] = (index + 1) % vptr->options.numtx;

		if (AVAIL_TD(vptr, qnum) < 1)
			netif_stop_queue(dev);

		td_ptr = &(vptr->td_rings[qnum][prev]);
		td_ptr->td_buf[0].queue = 1;
		mac_tx_queue_wake(vptr->mac_regs, qnum);
	}
	dev->trans_start = jiffies;
	spin_unlock_irqrestore(&vptr->lock, flags);
	return 0;
}

/**
 *	velocity_intr		-	interrupt callback
 *	@irq: interrupt number
 *	@dev_instance: interrupting device
 *
 *	Called whenever an interrupt is generated by the velocity
 *	adapter IRQ line. We may not be the source of the interrupt
 *	and need to identify initially if we are, and if not exit as
 *	efficiently as possible.
 */

static int velocity_intr(int irq, void *dev_instance)
{
	struct net_device *dev = dev_instance;
	struct velocity_info *vptr = netdev_priv(dev);
	u32 isr_status;
	int max_count = 0;


	spin_lock(&vptr->lock);
	isr_status = mac_read_isr(vptr->mac_regs);

	/* Not us ? */
	if (isr_status == 0) {
		spin_unlock(&vptr->lock);
		return IRQ_NONE;
	}

	mac_disable_int(vptr->mac_regs);

	/*
	 *	Keep processing the ISR until we have completed
	 *	processing and the isr_status becomes zero
	 */

	while (isr_status != 0) {
		mac_write_isr(vptr->mac_regs, isr_status);
		if (isr_status & (~(ISR_PRXI | ISR_PPRXI | ISR_PTXI | ISR_PPTXI)))
			velocity_error(vptr, isr_status);
		if (isr_status & (ISR_PRXI | ISR_PPRXI))
			max_count += velocity_rx_srv(vptr, isr_status);
		if (isr_status & (ISR_PTXI | ISR_PPTXI))
			max_count += velocity_tx_srv(vptr, isr_status);
		isr_status = mac_read_isr(vptr->mac_regs);
		if (max_count > vptr->options.int_works)
		{
			printk(KERN_WARNING "%s: excessive work at interrupt.\n",
				dev->name);
			max_count = 0;
		}
	}
	spin_unlock(&vptr->lock);
	mac_enable_int(vptr->mac_regs);
	return IRQ_HANDLED;

}


/**
 *	velocity_set_multi	-	filter list change callback
 *	@dev: network device
 *
 *	Called by the network layer when the filter lists need to change
 *	for a velocity adapter. Reload the CAMs with the new address
 *	filter ruleset.
 */

static void velocity_set_multi(struct net_device *dev)
{
	struct velocity_info *vptr = netdev_priv(dev);
	struct mac_regs __iomem * regs = vptr->mac_regs;
	u8 rx_mode;
	int i;
	struct dev_mc_list *mclist;

	if (dev->flags & IFF_PROMISC) {	/* Set promiscuous. */
		writel(0xffffffff, &regs->MARCAM[0]);
		writel(0xffffffff, &regs->MARCAM[4]);
		rx_mode = (RCR_AM | RCR_AB | RCR_PROM);
	} else if ((dev->mc_count > vptr->multicast_limit)
		   || (dev->flags & IFF_ALLMULTI)) {
		writel(0xffffffff, &regs->MARCAM[0]);
		writel(0xffffffff, &regs->MARCAM[4]);
		rx_mode = (RCR_AM | RCR_AB);
	} else {
		int offset = MCAM_SIZE - vptr->multicast_limit;
		mac_get_cam_mask(regs, vptr->mCAMmask);

		for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count; i++, mclist = mclist->next) {
			mac_set_cam(regs, i + offset, mclist->dmi_addr);
			vptr->mCAMmask[(offset + i) / 8] |= 1 << ((offset + i) & 7);
		}

		mac_set_cam_mask(regs, vptr->mCAMmask);
		rx_mode = (RCR_AM | RCR_AB);
	}
	if (dev->mtu > 1500)
		rx_mode |= RCR_AL;

	BYTE_REG_BITS_ON(rx_mode, &regs->RCR);

}

/**
 *	velocity_get_status	-	statistics callback
 *	@dev: network device
 *
 *	Callback from the network layer to allow driver statistics
 *	to be resynchronized with hardware collected state. In the
 *	case of the velocity we need to pull the MIB counters from
 *	the hardware into the counters before letting the network
 *	layer display them.
 */

static struct net_device_stats *velocity_get_stats(struct net_device *dev)
{
	struct velocity_info *vptr = netdev_priv(dev);

	/* If the hardware is down, don't touch MII */
	if(!netif_running(dev))
		return &vptr->stats;

	spin_lock_irq(&vptr->lock);
	velocity_update_hw_mibs(vptr);
	spin_unlock_irq(&vptr->lock);

	vptr->stats.rx_packets = vptr->mib_counter[HW_MIB_ifRxAllPkts];
	vptr->stats.rx_errors = vptr->mib_counter[HW_MIB_ifRxErrorPkts];
	vptr->stats.rx_length_errors = vptr->mib_counter[HW_MIB_ifInRangeLengthErrors];

//  unsigned long   rx_dropped;     /* no space in linux buffers    */
	vptr->stats.collisions = vptr->mib_counter[HW_MIB_ifTxEtherCollisions];
	/* detailed rx_errors: */
//  unsigned long   rx_length_errors;
//  unsigned long   rx_over_errors;     /* receiver ring buff overflow  */
	vptr->stats.rx_crc_errors = vptr->mib_counter[HW_MIB_ifRxPktCRCE];
//  unsigned long   rx_frame_errors;    /* recv'd frame alignment error */
//  unsigned long   rx_fifo_errors;     /* recv'r fifo overrun      */
//  unsigned long   rx_missed_errors;   /* receiver missed packet   */

	/* detailed tx_errors */
//  unsigned long   tx_fifo_errors;

	return &vptr->stats;
}


/**
 *	velocity_ioctl		-	ioctl entry point
 *	@dev: network device
 *	@rq: interface request ioctl
 *	@cmd: command code
 *
 *	Called when the user issues an ioctl request to the network
 *	device in question. The velocity interface supports MII.
 */

static int velocity_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
	struct velocity_info *vptr = netdev_priv(dev);
	int ret;

	/* If we are asked for information and the device is power
	   saving then we need to bring the device back up to talk to it */

	if (!netif_running(dev))
		pci_set_power_state(vptr->pdev, PCI_D0);

	switch (cmd) {
	case SIOCGMIIPHY:	/* Get address of MII PHY in use. */
	case SIOCGMIIREG:	/* Read MII PHY register. */
	case SIOCSMIIREG:	/* Write to MII PHY register. */
		ret = velocity_mii_ioctl(dev, rq, cmd);
		break;

	default:
		ret = -EOPNOTSUPP;
	}
	if (!netif_running(dev))
		pci_set_power_state(vptr->pdev, PCI_D3hot);


	return ret;
}

/*
 *	Definition for our device driver. The PCI layer interface
 *	uses this to handle all our card discover and plugging
 */

static struct pci_driver velocity_driver = {
      .name	= VELOCITY_NAME,
      .id_table	= velocity_id_table,
      .probe	= velocity_found1,
      .remove	= __devexit_p(velocity_remove1),
#ifdef CONFIG_PM
      .suspend	= velocity_suspend,
      .resume	= velocity_resume,
#endif
};

/**
 *	velocity_init_module	-	load time function
 *
 *	Called when the velocity module is loaded. The PCI driver
 *	is registered with the PCI layer, and in turn will call
 *	the probe functions for each velocity adapter installed
 *	in the system.
 */

static int __init velocity_init_module(void)
{
	int ret;

	velocity_register_notifier();
	ret = pci_register_driver(&velocity_driver);
	if (ret < 0)
		velocity_unregister_notifier();
	return ret;
}

/**
 *	velocity_cleanup	-	module unload
 *
 *	When the velocity hardware is unloaded this function is called.
 *	It will clean up the notifiers and the unregister the PCI
 *	driver interface for this hardware. This in turn cleans up
 *	all discovered interfaces before returning from the function
 */

static void __exit velocity_cleanup_module(void)
{
	velocity_unregister_notifier();
	pci_unregister_driver(&velocity_driver);
}

module_init(velocity_init_module);
module_exit(velocity_cleanup_module);


/*
 * MII access , media link mode setting functions
 */


/**
 *	mii_init	-	set up MII
 *	@vptr: velocity adapter
 *	@mii_status:  links tatus
 *
 *	Set up the PHY for the current link state.
 */

static void mii_init(struct velocity_info *vptr, u32 mii_status)
{
	u16 BMCR;

	switch (PHYID_GET_PHY_ID(vptr->phy_id)) {
	case PHYID_CICADA_CS8201:
		/*
		 *	Reset to hardware default
		 */
		MII_REG_BITS_OFF((ANAR_ASMDIR | ANAR_PAUSE), MII_REG_ANAR, vptr->mac_regs);
		/*
		 *	Turn on ECHODIS bit in NWay-forced full mode and turn it
		 *	off it in NWay-forced half mode for NWay-forced v.s.
		 *	legacy-forced issue.
		 */
		if (vptr->mii_status & VELOCITY_DUPLEX_FULL)
			MII_REG_BITS_ON(TCSR_ECHODIS, MII_REG_TCSR, vptr->mac_regs);
		else
			MII_REG_BITS_OFF(TCSR_ECHODIS, MII_REG_TCSR, vptr->mac_regs);
		/*
		 *	Turn on Link/Activity LED enable bit for CIS8201
		 */
		MII_REG_BITS_ON(PLED_LALBE, MII_REG_PLED, vptr->mac_regs);
		break;
	case PHYID_VT3216_32BIT:
	case PHYID_VT3216_64BIT:
		/*
		 *	Reset to hardware default
		 */
		MII_REG_BITS_ON((ANAR_ASMDIR | ANAR_PAUSE), MII_REG_ANAR, vptr->mac_regs);
		/*
		 *	Turn on ECHODIS bit in NWay-forced full mode and turn it
		 *	off it in NWay-forced half mode for NWay-forced v.s.
		 *	legacy-forced issue
		 */
		if (vptr->mii_status & VELOCITY_DUPLEX_FULL)
			MII_REG_BITS_ON(TCSR_ECHODIS, MII_REG_TCSR, vptr->mac_regs);
		else
			MII_REG_BITS_OFF(TCSR_ECHODIS, MII_REG_TCSR, vptr->mac_regs);
		break;

	case PHYID_MARVELL_1000:
	case PHYID_MARVELL_1000S:
		/*
		 *	Assert CRS on Transmit
		 */
		MII_REG_BITS_ON(PSCR_ACRSTX, MII_REG_PSCR, vptr->mac_regs);
		/*
		 *	Reset to hardware default
		 */
		MII_REG_BITS_ON((ANAR_ASMDIR | ANAR_PAUSE), MII_REG_ANAR, vptr->mac_regs);
		break;
	default:
		;
	}
	velocity_mii_read(vptr->mac_regs, MII_REG_BMCR, &BMCR);
	if (BMCR & BMCR_ISO) {
		BMCR &= ~BMCR_ISO;
		velocity_mii_write(vptr->mac_regs, MII_REG_BMCR, BMCR);
	}
}

/**
 *	safe_disable_mii_autopoll	-	autopoll off
 *	@regs: velocity registers
 *
 *	Turn off the autopoll and wait for it to disable on the chip
 */

static void safe_disable_mii_autopoll(struct mac_regs __iomem * regs)
{
	u16 ww;

	/*  turn off MAUTO */
	writeb(0, &regs->MIICR);
	for (ww = 0; ww < W_MAX_TIMEOUT; ww++) {
		udelay(1);
		if (BYTE_REG_BITS_IS_ON(MIISR_MIDLE, &regs->MIISR))
			break;
	}
}

/**
 *	enable_mii_autopoll	-	turn on autopolling
 *	@regs: velocity registers
 *
 *	Enable the MII link status autopoll feature on the Velocity
 *	hardware. Wait for it to enable.
 */

static void enable_mii_autopoll(struct mac_regs __iomem * regs)
{
	int ii;

	writeb(0, &(regs->MIICR));
	writeb(MIIADR_SWMPL, &regs->MIIADR);

	for (ii = 0; ii < W_MAX_TIMEOUT; ii++) {
		udelay(1);
		if (BYTE_REG_BITS_IS_ON(MIISR_MIDLE, &regs->MIISR))
			break;
	}

	writeb(MIICR_MAUTO, &regs->MIICR);

	for (ii = 0; ii < W_MAX_TIMEOUT; ii++) {
		udelay(1);
		if (!BYTE_REG_BITS_IS_ON(MIISR_MIDLE, &regs->MIISR))
			break;
	}

}

/**
 *	velocity_mii_read	-	read MII data
 *	@regs: velocity registers
 *	@index: MII register index
 *	@data: buffer for received data
 *
 *	Perform a single read of an MII 16bit register. Returns zero
 *	on success or -ETIMEDOUT if the PHY did not respond.
 */

static int velocity_mii_read(struct mac_regs __iomem *regs, u8 index, u16 *data)
{
	u16 ww;

	/*
	 *	Disable MIICR_MAUTO, so that mii addr can be set normally
	 */
	safe_disable_mii_autopoll(regs);

	writeb(index, &regs->MIIADR);

	BYTE_REG_BITS_ON(MIICR_RCMD, &regs->MIICR);

	for (ww = 0; ww < W_MAX_TIMEOUT; ww++) {
		if (!(readb(&regs->MIICR) & MIICR_RCMD))
			break;
	}

	*data = readw(&regs->MIIDATA);

	enable_mii_autopoll(regs);
	if (ww == W_MAX_TIMEOUT)
		return -ETIMEDOUT;
	return 0;
}

/**
 *	velocity_mii_write	-	write MII data
 *	@regs: velocity registers
 *	@index: MII register index
 *	@data: 16bit data for the MII register
 *
 *	Perform a single write to an MII 16bit register. Returns zero
 *	on success or -ETIMEDOUT if the PHY did not respond.
 */

static int velocity_mii_write(struct mac_regs __iomem *regs, u8 mii_addr, u16 data)
{
	u16 ww;

	/*
	 *	Disable MIICR_MAUTO, so that mii addr can be set normally
	 */
	safe_disable_mii_autopoll(regs);

	/* MII reg offset */
	writeb(mii_addr, &regs->MIIADR);
	/* set MII data */
	writew(data, &regs->MIIDATA);

	/* turn on MIICR_WCMD */
	BYTE_REG_BITS_ON(MIICR_WCMD, &regs->MIICR);

	/* W_MAX_TIMEOUT is the timeout period */
	for (ww = 0; ww < W_MAX_TIMEOUT; ww++) {
		udelay(5);
		if (!(readb(&regs->MIICR) & MIICR_WCMD))
			break;
	}
	enable_mii_autopoll(regs);

	if (ww == W_MAX_TIMEOUT)
		return -ETIMEDOUT;
	return 0;
}

/**
 *	velocity_get_opt_media_mode	-	get media selection
 *	@vptr: velocity adapter
 *
 *	Get the media mode stored in EEPROM or module options and load
 *	mii_status accordingly. The requested link state information
 *	is also returned.
 */

static u32 velocity_get_opt_media_mode(struct velocity_info *vptr)
{
	u32 status = 0;

	switch (vptr->options.spd_dpx) {
	case SPD_DPX_AUTO:
		status = VELOCITY_AUTONEG_ENABLE;
		break;
	case SPD_DPX_100_FULL:
		status = VELOCITY_SPEED_100 | VELOCITY_DUPLEX_FULL;
		break;
	case SPD_DPX_10_FULL:
		status = VELOCITY_SPEED_10 | VELOCITY_DUPLEX_FULL;
		break;
	case SPD_DPX_100_HALF:
		status = VELOCITY_SPEED_100;
		break;
	case SPD_DPX_10_HALF:
		status = VELOCITY_SPEED_10;
		break;
	}
	vptr->mii_status = status;
	return status;
}

/**
 *	mii_set_auto_on		-	autonegotiate on
 *	@vptr: velocity
 *
 *	Enable autonegotation on this interface
 */

static void mii_set_auto_on(struct velocity_info *vptr)
{
	if (MII_REG_BITS_IS_ON(BMCR_AUTO, MII_REG_BMCR, vptr->mac_regs))
		MII_REG_BITS_ON(BMCR_REAUTO, MII_REG_BMCR, vptr->mac_regs);
	else
		MII_REG_BITS_ON(BMCR_AUTO, MII_REG_BMCR, vptr->mac_regs);
}


/*
static void mii_set_auto_off(struct velocity_info * vptr)
{
    MII_REG_BITS_OFF(BMCR_AUTO, MII_REG_BMCR, vptr->mac_regs);
}
*/

/**
 *	set_mii_flow_control	-	flow control setup
 *	@vptr: velocity interface
 *
 *	Set up the flow control on this interface according to
 *	the supplied user/eeprom options.
 */

static void set_mii_flow_control(struct velocity_info *vptr)
{
	/*Enable or Disable PAUSE in ANAR */
	switch (vptr->options.flow_cntl) {
	case FLOW_CNTL_TX:
		MII_REG_BITS_OFF(ANAR_PAUSE, MII_REG_ANAR, vptr->mac_regs);
		MII_REG_BITS_ON(ANAR_ASMDIR, MII_REG_ANAR, vptr->mac_regs);
		break;

	case FLOW_CNTL_RX:
		MII_REG_BITS_ON(ANAR_PAUSE, MII_REG_ANAR, vptr->mac_regs);
		MII_REG_BITS_ON(ANAR_ASMDIR, MII_REG_ANAR, vptr->mac_regs);
		break;

	case FLOW_CNTL_TX_RX:
		MII_REG_BITS_ON(ANAR_PAUSE, MII_REG_ANAR, vptr->mac_regs);
		MII_REG_BITS_ON(ANAR_ASMDIR, MII_REG_ANAR, vptr->mac_regs);
		break;

	case FLOW_CNTL_DISABLE:
		MII_REG_BITS_OFF(ANAR_PAUSE, MII_REG_ANAR, vptr->mac_regs);
		MII_REG_BITS_OFF(ANAR_ASMDIR, MII_REG_ANAR, vptr->mac_regs);
		break;
	default:
		break;
	}
}

/**
 *	velocity_set_media_mode		-	set media mode
 *	@mii_status: old MII link state
 *
 *	Check the media link state and configure the flow control
 *	PHY and also velocity hardware setup accordingly. In particular
 *	we need to set up CD polling and frame bursting.
 */

static int velocity_set_media_mode(struct velocity_info *vptr, u32 mii_status)
{
	u32 curr_status;
	struct mac_regs __iomem * regs = vptr->mac_regs;

	vptr->mii_status = mii_check_media_mode(vptr->mac_regs);
	curr_status = vptr->mii_status & (~VELOCITY_LINK_FAIL);

	/* Set mii link status */
	set_mii_flow_control(vptr);

	/*
	   Check if new status is consisent with current status
	   if (((mii_status & curr_status) & VELOCITY_AUTONEG_ENABLE)
	   || (mii_status==curr_status)) {
	   vptr->mii_status=mii_check_media_mode(vptr->mac_regs);
	   vptr->mii_status=check_connection_type(vptr->mac_regs);
	   VELOCITY_PRT(MSG_LEVEL_INFO, "Velocity link no change\n");
	   return 0;
	   }
	 */

	if (PHYID_GET_PHY_ID(vptr->phy_id) == PHYID_CICADA_CS8201) {
		MII_REG_BITS_ON(AUXCR_MDPPS, MII_REG_AUXCR, vptr->mac_regs);
	}

	/*
	 *	If connection type is AUTO
	 */
	if (mii_status & VELOCITY_AUTONEG_ENABLE) {
		VELOCITY_PRT(MSG_LEVEL_INFO, "Velocity is AUTO mode\n");
		/* clear force MAC mode bit */
		BYTE_REG_BITS_OFF(CHIPGCR_FCMODE, &regs->CHIPGCR);
		/* set duplex mode of MAC according to duplex mode of MII */
		MII_REG_BITS_ON(ANAR_TXFD | ANAR_TX | ANAR_10FD | ANAR_10, MII_REG_ANAR, vptr->mac_regs);
		MII_REG_BITS_ON(G1000CR_1000FD | G1000CR_1000, MII_REG_G1000CR, vptr->mac_regs);
		MII_REG_BITS_ON(BMCR_SPEED1G, MII_REG_BMCR, vptr->mac_regs);

		/* enable AUTO-NEGO mode */
		mii_set_auto_on(vptr);
	} else {
		u16 ANAR;
		u8 CHIPGCR;

		/*
		 * 1. if it's 3119, disable frame bursting in halfduplex mode
		 *    and enable it in fullduplex mode
		 * 2. set correct MII/GMII and half/full duplex mode in CHIPGCR
		 * 3. only enable CD heart beat counter in 10HD mode
		 */

		/* set force MAC mode bit */
		BYTE_REG_BITS_ON(CHIPGCR_FCMODE, &regs->CHIPGCR);

		CHIPGCR = readb(&regs->CHIPGCR);
		CHIPGCR &= ~CHIPGCR_FCGMII;

		if (mii_status & VELOCITY_DUPLEX_FULL) {
			CHIPGCR |= CHIPGCR_FCFDX;
			writeb(CHIPGCR, &regs->CHIPGCR);
			VELOCITY_PRT(MSG_LEVEL_INFO, "set Velocity to forced full mode\n");
			if (vptr->rev_id < REV_ID_VT3216_A0)
				BYTE_REG_BITS_OFF(TCR_TB2BDIS, &regs->TCR);
		} else {
			CHIPGCR &= ~CHIPGCR_FCFDX;
			VELOCITY_PRT(MSG_LEVEL_INFO, "set Velocity to forced half mode\n");
			writeb(CHIPGCR, &regs->CHIPGCR);
			if (vptr->rev_id < REV_ID_VT3216_A0)
				BYTE_REG_BITS_ON(TCR_TB2BDIS, &regs->TCR);
		}

		MII_REG_BITS_OFF(G1000CR_1000FD | G1000CR_1000, MII_REG_G1000CR, vptr->mac_regs);

		if (!(mii_status & VELOCITY_DUPLEX_FULL) && (mii_status & VELOCITY_SPEED_10)) {
			BYTE_REG_BITS_OFF(TESTCFG_HBDIS, &regs->TESTCFG);
		} else {
			BYTE_REG_BITS_ON(TESTCFG_HBDIS, &regs->TESTCFG);
		}
		/* MII_REG_BITS_OFF(BMCR_SPEED1G, MII_REG_BMCR, vptr->mac_regs); */
		velocity_mii_read(vptr->mac_regs, MII_REG_ANAR, &ANAR);
		ANAR &= (~(ANAR_TXFD | ANAR_TX | ANAR_10FD | ANAR_10));
		if (mii_status & VELOCITY_SPEED_100) {
			if (mii_status & VELOCITY_DUPLEX_FULL)
				ANAR |= ANAR_TXFD;
			else
				ANAR |= ANAR_TX;
		} else {
			if (mii_status & VELOCITY_DUPLEX_FULL)
				ANAR |= ANAR_10FD;
			else
				ANAR |= ANAR_10;
		}
		velocity_mii_write(vptr->mac_regs, MII_REG_ANAR, ANAR);
		/* enable AUTO-NEGO mode */
		mii_set_auto_on(vptr);
		/* MII_REG_BITS_ON(BMCR_AUTO, MII_REG_BMCR, vptr->mac_regs); */
	}
	/* vptr->mii_status=mii_check_media_mode(vptr->mac_regs); */
	/* vptr->mii_status=check_connection_type(vptr->mac_regs); */
	return VELOCITY_LINK_CHANGE;
}

/**
 *	mii_check_media_mode	-	check media state
 *	@regs: velocity registers
 *
 *	Check the current MII status and determine the link status
 *	accordingly
 */

static u32 mii_check_media_mode(struct mac_regs __iomem * regs)
{
	u32 status = 0;
	u16 ANAR;

	if (!MII_REG_BITS_IS_ON(BMSR_LNK, MII_REG_BMSR, regs))
		status |= VELOCITY_LINK_FAIL;

	if (MII_REG_BITS_IS_ON(G1000CR_1000FD, MII_REG_G1000CR, regs))
		status |= VELOCITY_SPEED_1000 | VELOCITY_DUPLEX_FULL;
	else if (MII_REG_BITS_IS_ON(G1000CR_1000, MII_REG_G1000CR, regs))
		status |= (VELOCITY_SPEED_1000);
	else {
		velocity_mii_read(regs, MII_REG_ANAR, &ANAR);
		if (ANAR & ANAR_TXFD)
			status |= (VELOCITY_SPEED_100 | VELOCITY_DUPLEX_FULL);
		else if (ANAR & ANAR_TX)
			status |= VELOCITY_SPEED_100;
		else if (ANAR & ANAR_10FD)
			status |= (VELOCITY_SPEED_10 | VELOCITY_DUPLEX_FULL);
		else
			status |= (VELOCITY_SPEED_10);
	}

	if (MII_REG_BITS_IS_ON(BMCR_AUTO, MII_REG_BMCR, regs)) {
		velocity_mii_read(regs, MII_REG_ANAR, &ANAR);
		if ((ANAR & (ANAR_TXFD | ANAR_TX | ANAR_10FD | ANAR_10))
		    == (ANAR_TXFD | ANAR_TX | ANAR_10FD | ANAR_10)) {
			if (MII_REG_BITS_IS_ON(G1000CR_1000 | G1000CR_1000FD, MII_REG_G1000CR, regs))
				status |= VELOCITY_AUTONEG_ENABLE;
		}
	}

	return status;
}

static u32 check_connection_type(struct mac_regs __iomem * regs)
{
	u32 status = 0;
	u8 PHYSR0;
	u16 ANAR;
	PHYSR0 = readb(&regs->PHYSR0);

	/*
	   if (!(PHYSR0 & PHYSR0_LINKGD))
	   status|=VELOCITY_LINK_FAIL;
	 */

	if (PHYSR0 & PHYSR0_FDPX)
		status |= VELOCITY_DUPLEX_FULL;

	if (PHYSR0 & PHYSR0_SPDG)
		status |= VELOCITY_SPEED_1000;
	else if (PHYSR0 & PHYSR0_SPD10)
		status |= VELOCITY_SPEED_10;
	else
		status |= VELOCITY_SPEED_100;

	if (MII_REG_BITS_IS_ON(BMCR_AUTO, MII_REG_BMCR, regs)) {
		velocity_mii_read(regs, MII_REG_ANAR, &ANAR);
		if ((ANAR & (ANAR_TXFD | ANAR_TX | ANAR_10FD | ANAR_10))
		    == (ANAR_TXFD | ANAR_TX | ANAR_10FD | ANAR_10)) {
			if (MII_REG_BITS_IS_ON(G1000CR_1000 | G1000CR_1000FD, MII_REG_G1000CR, regs))
				status |= VELOCITY_AUTONEG_ENABLE;
		}
	}

	return status;
}

/**
 *	enable_flow_control_ability	-	flow control
 *	@vptr: veloity to configure
 *
 *	Set up flow control according to the flow control options
 *	determined by the eeprom/configuration.
 */

static void enable_flow_control_ability(struct velocity_info *vptr)
{

	struct mac_regs __iomem * regs = vptr->mac_regs;

	switch (vptr->options.flow_cntl) {

	case FLOW_CNTL_DEFAULT:
		if (BYTE_REG_BITS_IS_ON(PHYSR0_RXFLC, &regs->PHYSR0))
			writel(CR0_FDXRFCEN, &regs->CR0Set);
		else
			writel(CR0_FDXRFCEN, &regs->CR0Clr);

		if (BYTE_REG_BITS_IS_ON(PHYSR0_TXFLC, &regs->PHYSR0))
			writel(CR0_FDXTFCEN, &regs->CR0Set);
		else
			writel(CR0_FDXTFCEN, &regs->CR0Clr);
		break;

	case FLOW_CNTL_TX:
		writel(CR0_FDXTFCEN, &regs->CR0Set);
		writel(CR0_FDXRFCEN, &regs->CR0Clr);
		break;

	case FLOW_CNTL_RX:
		writel(CR0_FDXRFCEN, &regs->CR0Set);
		writel(CR0_FDXTFCEN, &regs->CR0Clr);
		break;

	case FLOW_CNTL_TX_RX:
		writel(CR0_FDXTFCEN, &regs->CR0Set);
		writel(CR0_FDXRFCEN, &regs->CR0Set);
		break;

	case FLOW_CNTL_DISABLE:
		writel(CR0_FDXRFCEN, &regs->CR0Clr);
		writel(CR0_FDXTFCEN, &regs->CR0Clr);
		break;

	default:
		break;
	}

}


/**
 *	velocity_ethtool_up	-	pre hook for ethtool
 *	@dev: network device
 *
 *	Called before an ethtool operation. We need to make sure the
 *	chip is out of D3 state before we poke at it.
 */

static int velocity_ethtool_up(struct net_device *dev)
{
	struct velocity_info *vptr = netdev_priv(dev);
	if (!netif_running(dev))
		pci_set_power_state(vptr->pdev, PCI_D0);
	return 0;
}

/**
 *	velocity_ethtool_down	-	post hook for ethtool
 *	@dev: network device
 *
 *	Called after an ethtool operation. Restore the chip back to D3
 *	state if it isn't running.
 */

static void velocity_ethtool_down(struct net_device *dev)
{
	struct velocity_info *vptr = netdev_priv(dev);
	if (!netif_running(dev))
		pci_set_power_state(vptr->pdev, PCI_D3hot);
}

static int velocity_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	struct velocity_info *vptr = netdev_priv(dev);
	struct mac_regs __iomem * regs = vptr->mac_regs;
	u32 status;
	status = check_connection_type(vptr->mac_regs);

	cmd->supported = SUPPORTED_TP |
			SUPPORTED_Autoneg |
			SUPPORTED_10baseT_Half |
			SUPPORTED_10baseT_Full |
			SUPPORTED_100baseT_Half |
			SUPPORTED_100baseT_Full |
			SUPPORTED_1000baseT_Half |
			SUPPORTED_1000baseT_Full;
	if (status & VELOCITY_SPEED_1000)
		cmd->speed = SPEED_1000;
	else if (status & VELOCITY_SPEED_100)
		cmd->speed = SPEED_100;
	else
		cmd->speed = SPEED_10;
	cmd->autoneg = (status & VELOCITY_AUTONEG_ENABLE) ? AUTONEG_ENABLE : AUTONEG_DISABLE;
	cmd->port = PORT_TP;
	cmd->transceiver = XCVR_INTERNAL;
	cmd->phy_address = readb(&regs->MIIADR) & 0x1F;

	if (status & VELOCITY_DUPLEX_FULL)
		cmd->duplex = DUPLEX_FULL;
	else
		cmd->duplex = DUPLEX_HALF;

	return 0;
}

static int velocity_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	struct velocity_info *vptr = netdev_priv(dev);
	u32 curr_status;
	u32 new_status = 0;
	int ret = 0;

	curr_status = check_connection_type(vptr->mac_regs);
	curr_status &= (~VELOCITY_LINK_FAIL);

	new_status |= ((cmd->autoneg) ? VELOCITY_AUTONEG_ENABLE : 0);
	new_status |= ((cmd->speed == SPEED_100) ? VELOCITY_SPEED_100 : 0);
	new_status |= ((cmd->speed == SPEED_10) ? VELOCITY_SPEED_10 : 0);
	new_status |= ((cmd->duplex == DUPLEX_FULL) ? VELOCITY_DUPLEX_FULL : 0);

	if ((new_status & VELOCITY_AUTONEG_ENABLE) && (new_status != (curr_status | VELOCITY_AUTONEG_ENABLE)))
		ret = -EINVAL;
	else
		velocity_set_media_mode(vptr, new_status);

	return ret;
}

static u32 velocity_get_link(struct net_device *dev)
{
	struct velocity_info *vptr = netdev_priv(dev);
	struct mac_regs __iomem * regs = vptr->mac_regs;
	return BYTE_REG_BITS_IS_ON(PHYSR0_LINKGD, &regs->PHYSR0) ? 1 : 0;
}

static void velocity_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
	struct velocity_info *vptr = netdev_priv(dev);
	strcpy(info->driver, VELOCITY_NAME);
	strcpy(info->version, VELOCITY_VERSION);
	strcpy(info->bus_info, pci_name(vptr->pdev));
}

static void velocity_ethtool_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
{
	struct velocity_info *vptr = netdev_priv(dev);
	wol->supported = WAKE_PHY | WAKE_MAGIC | WAKE_UCAST | WAKE_ARP;
	wol->wolopts |= WAKE_MAGIC;
	/*
	   if (vptr->wol_opts & VELOCITY_WOL_PHY)
		   wol.wolopts|=WAKE_PHY;
			 */
	if (vptr->wol_opts & VELOCITY_WOL_UCAST)
		wol->wolopts |= WAKE_UCAST;
	if (vptr->wol_opts & VELOCITY_WOL_ARP)
		wol->wolopts |= WAKE_ARP;
	memcpy(&wol->sopass, vptr->wol_passwd, 6);
}

static int velocity_ethtool_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
{
	struct velocity_info *vptr = netdev_priv(dev);

	if (!(wol->wolopts & (WAKE_PHY | WAKE_MAGIC | WAKE_UCAST | WAKE_ARP)))
		return -EFAULT;
	vptr->wol_opts = VELOCITY_WOL_MAGIC;

	/*
	   if (wol.wolopts & WAKE_PHY) {
	   vptr->wol_opts|=VELOCITY_WOL_PHY;
	   vptr->flags |=VELOCITY_FLAGS_WOL_ENABLED;
	   }
	 */

	if (wol->wolopts & WAKE_MAGIC) {
		vptr->wol_opts |= VELOCITY_WOL_MAGIC;
		vptr->flags |= VELOCITY_FLAGS_WOL_ENABLED;
	}
	if (wol->wolopts & WAKE_UCAST) {
		vptr->wol_opts |= VELOCITY_WOL_UCAST;
		vptr->flags |= VELOCITY_FLAGS_WOL_ENABLED;
	}
	if (wol->wolopts & WAKE_ARP) {
		vptr->wol_opts |= VELOCITY_WOL_ARP;
		vptr->flags |= VELOCITY_FLAGS_WOL_ENABLED;
	}
	memcpy(vptr->wol_passwd, wol->sopass, 6);
	return 0;
}

static u32 velocity_get_msglevel(struct net_device *dev)
{
	return msglevel;
}

static void velocity_set_msglevel(struct net_device *dev, u32 value)
{
	 msglevel = value;
}

static const struct ethtool_ops velocity_ethtool_ops = {
	.get_settings	=	velocity_get_settings,
	.set_settings	=	velocity_set_settings,
	.get_drvinfo	=	velocity_get_drvinfo,
	.get_wol	=	velocity_ethtool_get_wol,
	.set_wol	=	velocity_ethtool_set_wol,
	.get_msglevel	=	velocity_get_msglevel,
	.set_msglevel	=	velocity_set_msglevel,
	.get_link	=	velocity_get_link,
	.begin		=	velocity_ethtool_up,
	.complete	=	velocity_ethtool_down
};

/**
 *	velocity_mii_ioctl		-	MII ioctl handler
 *	@dev: network device
 *	@ifr: the ifreq block for the ioctl
 *	@cmd: the command
 *
 *	Process MII requests made via ioctl from the network layer. These
 *	are used by tools like kudzu to interrogate the link state of the
 *	hardware
 */

static int velocity_mii_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
	struct velocity_info *vptr = netdev_priv(dev);
	struct mac_regs __iomem * regs = vptr->mac_regs;
	unsigned long flags;
	struct mii_ioctl_data *miidata = if_mii(ifr);
	int err;

	switch (cmd) {
	case SIOCGMIIPHY:
		miidata->phy_id = readb(&regs->MIIADR) & 0x1f;
		break;
	case SIOCGMIIREG:
		if (!capable(CAP_NET_ADMIN))
			return -EPERM;
		if(velocity_mii_read(vptr->mac_regs, miidata->reg_num & 0x1f, &(miidata->val_out)) < 0)
			return -ETIMEDOUT;
		break;
	case SIOCSMIIREG:
		if (!capable(CAP_NET_ADMIN))
			return -EPERM;
		spin_lock_irqsave(&vptr->lock, flags);
		err = velocity_mii_write(vptr->mac_regs, miidata->reg_num & 0x1f, miidata->val_in);
		spin_unlock_irqrestore(&vptr->lock, flags);
		check_connection_type(vptr->mac_regs);
		if(err)
			return err;
		break;
	default:
		return -EOPNOTSUPP;
	}
	return 0;
}

#ifdef CONFIG_PM

/**
 *	velocity_save_context	-	save registers
 *	@vptr: velocity
 *	@context: buffer for stored context
 *
 *	Retrieve the current configuration from the velocity hardware
 *	and stash it in the context structure, for use by the context
 *	restore functions. This allows us to save things we need across
 *	power down states
 */

static void velocity_save_context(struct velocity_info *vptr, struct velocity_context * context)
{
	struct mac_regs __iomem * regs = vptr->mac_regs;
	u16 i;
	u8 __iomem *ptr = (u8 __iomem *)regs;

	for (i = MAC_REG_PAR; i < MAC_REG_CR0_CLR; i += 4)
		*((u32 *) (context->mac_reg + i)) = readl(ptr + i);

	for (i = MAC_REG_MAR; i < MAC_REG_TDCSR_CLR; i += 4)
		*((u32 *) (context->mac_reg + i)) = readl(ptr + i);

	for (i = MAC_REG_RDBASE_LO; i < MAC_REG_FIFO_TEST0; i += 4)
		*((u32 *) (context->mac_reg + i)) = readl(ptr + i);

}

/**
 *	velocity_restore_context	-	restore registers
 *	@vptr: velocity
 *	@context: buffer for stored context
 *
 *	Reload the register configuration from the velocity context
 *	created by velocity_save_context.
 */

static void velocity_restore_context(struct velocity_info *vptr, struct velocity_context *context)
{
	struct mac_regs __iomem * regs = vptr->mac_regs;
	int i;
	u8 __iomem *ptr = (u8 __iomem *)regs;

	for (i = MAC_REG_PAR; i < MAC_REG_CR0_SET; i += 4) {
		writel(*((u32 *) (context->mac_reg + i)), ptr + i);
	}

	/* Just skip cr0 */
	for (i = MAC_REG_CR1_SET; i < MAC_REG_CR0_CLR; i++) {
		/* Clear */
		writeb(~(*((u8 *) (context->mac_reg + i))), ptr + i + 4);
		/* Set */
		writeb(*((u8 *) (context->mac_reg + i)), ptr + i);
	}

	for (i = MAC_REG_MAR; i < MAC_REG_IMR; i += 4) {
		writel(*((u32 *) (context->mac_reg + i)), ptr + i);
	}

	for (i = MAC_REG_RDBASE_LO; i < MAC_REG_FIFO_TEST0; i += 4) {
		writel(*((u32 *) (context->mac_reg + i)), ptr + i);
	}

	for (i = MAC_REG_TDCSR_SET; i <= MAC_REG_RDCSR_SET; i++) {
		writeb(*((u8 *) (context->mac_reg + i)), ptr + i);
	}

}

/**
 *	wol_calc_crc		-	WOL CRC
 *	@pattern: data pattern
 *	@mask_pattern: mask
 *
 *	Compute the wake on lan crc hashes for the packet header
 *	we are interested in.
 */

static u16 wol_calc_crc(int size, u8 * pattern, u8 *mask_pattern)
{
	u16 crc = 0xFFFF;
	u8 mask;
	int i, j;

	for (i = 0; i < size; i++) {
		mask = mask_pattern[i];

		/* Skip this loop if the mask equals to zero */
		if (mask == 0x00)
			continue;

		for (j = 0; j < 8; j++) {
			if ((mask & 0x01) == 0) {
				mask >>= 1;
				continue;
			}
			mask >>= 1;
			crc = crc_ccitt(crc, &(pattern[i * 8 + j]), 1);
		}
	}
	/*	Finally, invert the result once to get the correct data */
	crc = ~crc;
	return bitrev32(crc) >> 16;
}

/**
 *	velocity_set_wol	-	set up for wake on lan
 *	@vptr: velocity to set WOL status on
 *
 *	Set a card up for wake on lan either by unicast or by
 *	ARP packet.
 *
 *	FIXME: check static buffer is safe here
 */

static int velocity_set_wol(struct velocity_info *vptr)
{
	struct mac_regs __iomem * regs = vptr->mac_regs;
	static u8 buf[256];
	int i;

	static u32 mask_pattern[2][4] = {
		{0x00203000, 0x000003C0, 0x00000000, 0x0000000}, /* ARP */
		{0xfffff000, 0xffffffff, 0xffffffff, 0x000ffff}	 /* Magic Packet */
	};

	writew(0xFFFF, &regs->WOLCRClr);
	writeb(WOLCFG_SAB | WOLCFG_SAM, &regs->WOLCFGSet);
	writew(WOLCR_MAGIC_EN, &regs->WOLCRSet);

	/*
	   if (vptr->wol_opts & VELOCITY_WOL_PHY)
	   writew((WOLCR_LINKON_EN|WOLCR_LINKOFF_EN), &regs->WOLCRSet);
	 */

	if (vptr->wol_opts & VELOCITY_WOL_UCAST) {
		writew(WOLCR_UNICAST_EN, &regs->WOLCRSet);
	}

	if (vptr->wol_opts & VELOCITY_WOL_ARP) {
		struct arp_packet *arp = (struct arp_packet *) buf;
		u16 crc;
		memset(buf, 0, sizeof(struct arp_packet) + 7);

		for (i = 0; i < 4; i++)
			writel(mask_pattern[0][i], &regs->ByteMask[0][i]);

		arp->type = htons(ETH_P_ARP);
		arp->ar_op = htons(1);

		memcpy(arp->ar_tip, vptr->ip_addr, 4);

		crc = wol_calc_crc((sizeof(struct arp_packet) + 7) / 8, buf,
				(u8 *) & mask_pattern[0][0]);

		writew(crc, &regs->PatternCRC[0]);
		writew(WOLCR_ARP_EN, &regs->WOLCRSet);
	}

	BYTE_REG_BITS_ON(PWCFG_WOLTYPE, &regs->PWCFGSet);
	BYTE_REG_BITS_ON(PWCFG_LEGACY_WOLEN, &regs->PWCFGSet);

	writew(0x0FFF, &regs->WOLSRClr);

	if (vptr->mii_status & VELOCITY_AUTONEG_ENABLE) {
		if (PHYID_GET_PHY_ID(vptr->phy_id) == PHYID_CICADA_CS8201)
			MII_REG_BITS_ON(AUXCR_MDPPS, MII_REG_AUXCR, vptr->mac_regs);

		MII_REG_BITS_OFF(G1000CR_1000FD | G1000CR_1000, MII_REG_G1000CR, vptr->mac_regs);
	}

	if (vptr->mii_status & VELOCITY_SPEED_1000)
		MII_REG_BITS_ON(BMCR_REAUTO, MII_REG_BMCR, vptr->mac_regs);

	BYTE_REG_BITS_ON(CHIPGCR_FCMODE, &regs->CHIPGCR);

	{
		u8 GCR;
		GCR = readb(&regs->CHIPGCR);
		GCR = (GCR & ~CHIPGCR_FCGMII) | CHIPGCR_FCFDX;
		writeb(GCR, &regs->CHIPGCR);
	}

	BYTE_REG_BITS_OFF(ISR_PWEI, &regs->ISR);
	/* Turn on SWPTAG just before entering power mode */
	BYTE_REG_BITS_ON(STICKHW_SWPTAG, &regs->STICKHW);
	/* Go to bed ..... */
	BYTE_REG_BITS_ON((STICKHW_DS1 | STICKHW_DS0), &regs->STICKHW);

	return 0;
}

static int velocity_suspend(struct pci_dev *pdev, pm_message_t state)
{
	struct net_device *dev = pci_get_drvdata(pdev);
	struct velocity_info *vptr = netdev_priv(dev);
	unsigned long flags;

	if(!netif_running(vptr->dev))
		return 0;

	netif_device_detach(vptr->dev);

	spin_lock_irqsave(&vptr->lock, flags);
	pci_save_state(pdev);
#ifdef ETHTOOL_GWOL
	if (vptr->flags & VELOCITY_FLAGS_WOL_ENABLED) {
		velocity_get_ip(vptr);
		velocity_save_context(vptr, &vptr->context);
		velocity_shutdown(vptr);
		velocity_set_wol(vptr);
		pci_enable_wake(pdev, 3, 1);
		pci_set_power_state(pdev, PCI_D3hot);
	} else {
		velocity_save_context(vptr, &vptr->context);
		velocity_shutdown(vptr);
		pci_disable_device(pdev);
		pci_set_power_state(pdev, pci_choose_state(pdev, state));
	}
#else
	pci_set_power_state(pdev, pci_choose_state(pdev, state));
#endif
	spin_unlock_irqrestore(&vptr->lock, flags);
	return 0;
}

static int velocity_resume(struct pci_dev *pdev)
{
	struct net_device *dev = pci_get_drvdata(pdev);
	struct velocity_info *vptr = netdev_priv(dev);
	unsigned long flags;
	int i;

	if(!netif_running(vptr->dev))
		return 0;

	pci_set_power_state(pdev, PCI_D0);
	pci_enable_wake(pdev, 0, 0);
	pci_restore_state(pdev);

	mac_wol_reset(vptr->mac_regs);

	spin_lock_irqsave(&vptr->lock, flags);
	velocity_restore_context(vptr, &vptr->context);
	velocity_init_registers(vptr, VELOCITY_INIT_WOL);
	mac_disable_int(vptr->mac_regs);

	velocity_tx_srv(vptr, 0);

	for (i = 0; i < vptr->num_txq; i++) {
		if (vptr->td_used[i]) {
			mac_tx_queue_wake(vptr->mac_regs, i);
		}
	}

	mac_enable_int(vptr->mac_regs);
	spin_unlock_irqrestore(&vptr->lock, flags);
	netif_device_attach(vptr->dev);

	return 0;
}

#ifdef CONFIG_INET

static int velocity_netdev_event(struct notifier_block *nb, unsigned long notification, void *ptr)
{
	struct in_ifaddr *ifa = (struct in_ifaddr *) ptr;

	if (ifa) {
		struct net_device *dev = ifa->ifa_dev->dev;
		struct velocity_info *vptr;
		unsigned long flags;

		spin_lock_irqsave(&velocity_dev_list_lock, flags);
		list_for_each_entry(vptr, &velocity_dev_list, list) {
			if (vptr->dev == dev) {
				velocity_get_ip(vptr);
				break;
			}
		}
		spin_unlock_irqrestore(&velocity_dev_list_lock, flags);
	}
	return NOTIFY_DONE;
}

#endif
#endif