summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/3com/3c59x.c
blob: 2d1ce3c5d0dd34c9fabb1399a32c49be744afdd1 (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
/* EtherLinkXL.c: A 3Com EtherLink PCI III/XL ethernet driver for linux. */
/*
	Written 1996-1999 by Donald Becker.

	This software may be used and distributed according to the terms
	of the GNU General Public License, incorporated herein by reference.

	This driver is for the 3Com "Vortex" and "Boomerang" series ethercards.
	Members of the series include Fast EtherLink 3c590/3c592/3c595/3c597
	and the EtherLink XL 3c900 and 3c905 cards.

	Problem reports and questions should be directed to
	vortex@scyld.com

	The author may be reached as becker@scyld.com, or C/O
	Scyld Computing Corporation
	410 Severn Ave., Suite 210
	Annapolis MD 21403

*/

/*
 * FIXME: This driver _could_ support MTU changing, but doesn't.  See Don's hamachi.c implementation
 * as well as other drivers
 *
 * NOTE: If you make 'vortex_debug' a constant (#define vortex_debug 0) the driver shrinks by 2k
 * due to dead code elimination.  There will be some performance benefits from this due to
 * elimination of all the tests and reduced cache footprint.
 */


#define DRV_NAME	"3c59x"



/* A few values that may be tweaked. */
/* Keep the ring sizes a power of two for efficiency. */
#define TX_RING_SIZE	16
#define RX_RING_SIZE	32
#define PKT_BUF_SZ		1536			/* Size of each temporary Rx buffer.*/

/* "Knobs" that adjust features and parameters. */
/* Set the copy breakpoint for the copy-only-tiny-frames scheme.
   Setting to > 1512 effectively disables this feature. */
#ifndef __arm__
static int rx_copybreak = 200;
#else
/* ARM systems perform better by disregarding the bus-master
   transfer capability of these cards. -- rmk */
static int rx_copybreak = 1513;
#endif
/* Allow setting MTU to a larger size, bypassing the normal ethernet setup. */
static const int mtu = 1500;
/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
static int max_interrupt_work = 32;
/* Tx timeout interval (millisecs) */
static int watchdog = 5000;

/* Allow aggregation of Tx interrupts.  Saves CPU load at the cost
 * of possible Tx stalls if the system is blocking interrupts
 * somewhere else.  Undefine this to disable.
 */
#define tx_interrupt_mitigation 1

/* Put out somewhat more debugging messages. (0: no msg, 1 minimal .. 6). */
#define vortex_debug debug
#ifdef VORTEX_DEBUG
static int vortex_debug = VORTEX_DEBUG;
#else
static int vortex_debug = 1;
#endif

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/errno.h>
#include <linux/in.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/mii.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/ethtool.h>
#include <linux/highmem.h>
#include <linux/eisa.h>
#include <linux/bitops.h>
#include <linux/jiffies.h>
#include <linux/gfp.h>
#include <asm/irq.h>			/* For nr_irqs only. */
#include <asm/io.h>
#include <asm/uaccess.h>

/* Kernel compatibility defines, some common to David Hinds' PCMCIA package.
   This is only in the support-all-kernels source code. */

#define RUN_AT(x) (jiffies + (x))

#include <linux/delay.h>


static const char version[] =
	DRV_NAME ": Donald Becker and others.\n";

MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
MODULE_DESCRIPTION("3Com 3c59x/3c9xx ethernet driver ");
MODULE_LICENSE("GPL");


/* Operational parameter that usually are not changed. */

/* The Vortex size is twice that of the original EtherLinkIII series: the
   runtime register window, window 1, is now always mapped in.
   The Boomerang size is twice as large as the Vortex -- it has additional
   bus master control registers. */
#define VORTEX_TOTAL_SIZE 0x20
#define BOOMERANG_TOTAL_SIZE 0x40

/* Set iff a MII transceiver on any interface requires mdio preamble.
   This only set with the original DP83840 on older 3c905 boards, so the extra
   code size of a per-interface flag is not worthwhile. */
static char mii_preamble_required;

#define PFX DRV_NAME ": "



/*
				Theory of Operation

I. Board Compatibility

This device driver is designed for the 3Com FastEtherLink and FastEtherLink
XL, 3Com's PCI to 10/100baseT adapters.  It also works with the 10Mbs
versions of the FastEtherLink cards.  The supported product IDs are
  3c590, 3c592, 3c595, 3c597, 3c900, 3c905

The related ISA 3c515 is supported with a separate driver, 3c515.c, included
with the kernel source or available from
    cesdis.gsfc.nasa.gov:/pub/linux/drivers/3c515.html

II. Board-specific settings

PCI bus devices are configured by the system at boot time, so no jumpers
need to be set on the board.  The system BIOS should be set to assign the
PCI INTA signal to an otherwise unused system IRQ line.

The EEPROM settings for media type and forced-full-duplex are observed.
The EEPROM media type should be left at the default "autoselect" unless using
10base2 or AUI connections which cannot be reliably detected.

III. Driver operation

The 3c59x series use an interface that's very similar to the previous 3c5x9
series.  The primary interface is two programmed-I/O FIFOs, with an
alternate single-contiguous-region bus-master transfer (see next).

The 3c900 "Boomerang" series uses a full-bus-master interface with separate
lists of transmit and receive descriptors, similar to the AMD LANCE/PCnet,
DEC Tulip and Intel Speedo3.  The first chip version retains a compatible
programmed-I/O interface that has been removed in 'B' and subsequent board
revisions.

One extension that is advertised in a very large font is that the adapters
are capable of being bus masters.  On the Vortex chip this capability was
only for a single contiguous region making it far less useful than the full
bus master capability.  There is a significant performance impact of taking
an extra interrupt or polling for the completion of each transfer, as well
as difficulty sharing the single transfer engine between the transmit and
receive threads.  Using DMA transfers is a win only with large blocks or
with the flawed versions of the Intel Orion motherboard PCI controller.

The Boomerang chip's full-bus-master interface is useful, and has the
currently-unused advantages over other similar chips that queued transmit
packets may be reordered and receive buffer groups are associated with a
single frame.

With full-bus-master support, this driver uses a "RX_COPYBREAK" scheme.
Rather than a fixed intermediate receive buffer, this scheme allocates
full-sized skbuffs as receive buffers.  The value RX_COPYBREAK is used as
the copying breakpoint: it is chosen to trade-off the memory wasted by
passing the full-sized skbuff to the queue layer for all frames vs. the
copying cost of copying a frame to a correctly-sized skbuff.

IIIC. Synchronization
The driver runs as two independent, single-threaded flows of control.  One
is the send-packet routine, which enforces single-threaded use by the
dev->tbusy flag.  The other thread is the interrupt handler, which is single
threaded by the hardware and other software.

IV. Notes

Thanks to Cameron Spitzer and Terry Murphy of 3Com for providing development
3c590, 3c595, and 3c900 boards.
The name "Vortex" is the internal 3Com project name for the PCI ASIC, and
the EISA version is called "Demon".  According to Terry these names come
from rides at the local amusement park.

The new chips support both ethernet (1.5K) and FDDI (4.5K) packet sizes!
This driver only supports ethernet packets because of the skbuff allocation
limit of 4K.
*/

/* This table drives the PCI probe routines.  It's mostly boilerplate in all
   of the drivers, and will likely be provided by some future kernel.
*/
enum pci_flags_bit {
	PCI_USES_MASTER=4,
};

enum {	IS_VORTEX=1, IS_BOOMERANG=2, IS_CYCLONE=4, IS_TORNADO=8,
	EEPROM_8BIT=0x10,	/* AKPM: Uses 0x230 as the base bitmaps for EEPROM reads */
	HAS_PWR_CTRL=0x20, HAS_MII=0x40, HAS_NWAY=0x80, HAS_CB_FNS=0x100,
	INVERT_MII_PWR=0x200, INVERT_LED_PWR=0x400, MAX_COLLISION_RESET=0x800,
	EEPROM_OFFSET=0x1000, HAS_HWCKSM=0x2000, WNO_XCVR_PWR=0x4000,
	EXTRA_PREAMBLE=0x8000, EEPROM_RESET=0x10000, };

enum vortex_chips {
	CH_3C590 = 0,
	CH_3C592,
	CH_3C597,
	CH_3C595_1,
	CH_3C595_2,

	CH_3C595_3,
	CH_3C900_1,
	CH_3C900_2,
	CH_3C900_3,
	CH_3C900_4,

	CH_3C900_5,
	CH_3C900B_FL,
	CH_3C905_1,
	CH_3C905_2,
	CH_3C905B_TX,
	CH_3C905B_1,

	CH_3C905B_2,
	CH_3C905B_FX,
	CH_3C905C,
	CH_3C9202,
	CH_3C980,
	CH_3C9805,

	CH_3CSOHO100_TX,
	CH_3C555,
	CH_3C556,
	CH_3C556B,
	CH_3C575,

	CH_3C575_1,
	CH_3CCFE575,
	CH_3CCFE575CT,
	CH_3CCFE656,
	CH_3CCFEM656,

	CH_3CCFEM656_1,
	CH_3C450,
	CH_3C920,
	CH_3C982A,
	CH_3C982B,

	CH_905BT4,
	CH_920B_EMB_WNM,
};


/* note: this array directly indexed by above enums, and MUST
 * be kept in sync with both the enums above, and the PCI device
 * table below
 */
static struct vortex_chip_info {
	const char *name;
	int flags;
	int drv_flags;
	int io_size;
} vortex_info_tbl[] = {
	{"3c590 Vortex 10Mbps",
	 PCI_USES_MASTER, IS_VORTEX, 32, },
	{"3c592 EISA 10Mbps Demon/Vortex",					/* AKPM: from Don's 3c59x_cb.c 0.49H */
	 PCI_USES_MASTER, IS_VORTEX, 32, },
	{"3c597 EISA Fast Demon/Vortex",					/* AKPM: from Don's 3c59x_cb.c 0.49H */
	 PCI_USES_MASTER, IS_VORTEX, 32, },
	{"3c595 Vortex 100baseTx",
	 PCI_USES_MASTER, IS_VORTEX, 32, },
	{"3c595 Vortex 100baseT4",
	 PCI_USES_MASTER, IS_VORTEX, 32, },

	{"3c595 Vortex 100base-MII",
	 PCI_USES_MASTER, IS_VORTEX, 32, },
	{"3c900 Boomerang 10baseT",
	 PCI_USES_MASTER, IS_BOOMERANG|EEPROM_RESET, 64, },
	{"3c900 Boomerang 10Mbps Combo",
	 PCI_USES_MASTER, IS_BOOMERANG|EEPROM_RESET, 64, },
	{"3c900 Cyclone 10Mbps TPO",						/* AKPM: from Don's 0.99M */
	 PCI_USES_MASTER, IS_CYCLONE|HAS_HWCKSM, 128, },
	{"3c900 Cyclone 10Mbps Combo",
	 PCI_USES_MASTER, IS_CYCLONE|HAS_HWCKSM, 128, },

	{"3c900 Cyclone 10Mbps TPC",						/* AKPM: from Don's 0.99M */
	 PCI_USES_MASTER, IS_CYCLONE|HAS_HWCKSM, 128, },
	{"3c900B-FL Cyclone 10base-FL",
	 PCI_USES_MASTER, IS_CYCLONE|HAS_HWCKSM, 128, },
	{"3c905 Boomerang 100baseTx",
	 PCI_USES_MASTER, IS_BOOMERANG|HAS_MII|EEPROM_RESET, 64, },
	{"3c905 Boomerang 100baseT4",
	 PCI_USES_MASTER, IS_BOOMERANG|HAS_MII|EEPROM_RESET, 64, },
	{"3C905B-TX Fast Etherlink XL PCI",
	 PCI_USES_MASTER, IS_CYCLONE|HAS_NWAY|HAS_HWCKSM|EXTRA_PREAMBLE, 128, },
	{"3c905B Cyclone 100baseTx",
	 PCI_USES_MASTER, IS_CYCLONE|HAS_NWAY|HAS_HWCKSM|EXTRA_PREAMBLE, 128, },

	{"3c905B Cyclone 10/100/BNC",
	 PCI_USES_MASTER, IS_CYCLONE|HAS_NWAY|HAS_HWCKSM, 128, },
	{"3c905B-FX Cyclone 100baseFx",
	 PCI_USES_MASTER, IS_CYCLONE|HAS_HWCKSM, 128, },
	{"3c905C Tornado",
	PCI_USES_MASTER, IS_TORNADO|HAS_NWAY|HAS_HWCKSM|EXTRA_PREAMBLE, 128, },
	{"3c920B-EMB-WNM (ATI Radeon 9100 IGP)",
	 PCI_USES_MASTER, IS_TORNADO|HAS_MII|HAS_HWCKSM, 128, },
	{"3c980 Cyclone",
	 PCI_USES_MASTER, IS_CYCLONE|HAS_HWCKSM|EXTRA_PREAMBLE, 128, },

	{"3c980C Python-T",
	 PCI_USES_MASTER, IS_CYCLONE|HAS_NWAY|HAS_HWCKSM, 128, },
	{"3cSOHO100-TX Hurricane",
	 PCI_USES_MASTER, IS_CYCLONE|HAS_NWAY|HAS_HWCKSM|EXTRA_PREAMBLE, 128, },
	{"3c555 Laptop Hurricane",
	 PCI_USES_MASTER, IS_CYCLONE|EEPROM_8BIT|HAS_HWCKSM, 128, },
	{"3c556 Laptop Tornado",
	 PCI_USES_MASTER, IS_TORNADO|HAS_NWAY|EEPROM_8BIT|HAS_CB_FNS|INVERT_MII_PWR|
									HAS_HWCKSM, 128, },
	{"3c556B Laptop Hurricane",
	 PCI_USES_MASTER, IS_TORNADO|HAS_NWAY|EEPROM_OFFSET|HAS_CB_FNS|INVERT_MII_PWR|
	                                WNO_XCVR_PWR|HAS_HWCKSM, 128, },

	{"3c575 [Megahertz] 10/100 LAN 	CardBus",
	PCI_USES_MASTER, IS_BOOMERANG|HAS_MII|EEPROM_8BIT, 128, },
	{"3c575 Boomerang CardBus",
	 PCI_USES_MASTER, IS_BOOMERANG|HAS_MII|EEPROM_8BIT, 128, },
	{"3CCFE575BT Cyclone CardBus",
	 PCI_USES_MASTER, IS_CYCLONE|HAS_NWAY|HAS_CB_FNS|EEPROM_8BIT|
									INVERT_LED_PWR|HAS_HWCKSM, 128, },
	{"3CCFE575CT Tornado CardBus",
	 PCI_USES_MASTER, IS_TORNADO|HAS_NWAY|HAS_CB_FNS|EEPROM_8BIT|INVERT_MII_PWR|
									MAX_COLLISION_RESET|HAS_HWCKSM, 128, },
	{"3CCFE656 Cyclone CardBus",
	 PCI_USES_MASTER, IS_CYCLONE|HAS_NWAY|HAS_CB_FNS|EEPROM_8BIT|INVERT_MII_PWR|
									INVERT_LED_PWR|HAS_HWCKSM, 128, },

	{"3CCFEM656B Cyclone+Winmodem CardBus",
	 PCI_USES_MASTER, IS_CYCLONE|HAS_NWAY|HAS_CB_FNS|EEPROM_8BIT|INVERT_MII_PWR|
									INVERT_LED_PWR|HAS_HWCKSM, 128, },
	{"3CXFEM656C Tornado+Winmodem CardBus",			/* From pcmcia-cs-3.1.5 */
	 PCI_USES_MASTER, IS_TORNADO|HAS_NWAY|HAS_CB_FNS|EEPROM_8BIT|INVERT_MII_PWR|
									MAX_COLLISION_RESET|HAS_HWCKSM, 128, },
	{"3c450 HomePNA Tornado",						/* AKPM: from Don's 0.99Q */
	 PCI_USES_MASTER, IS_TORNADO|HAS_NWAY|HAS_HWCKSM, 128, },
	{"3c920 Tornado",
	 PCI_USES_MASTER, IS_TORNADO|HAS_NWAY|HAS_HWCKSM, 128, },
	{"3c982 Hydra Dual Port A",
	 PCI_USES_MASTER, IS_TORNADO|HAS_HWCKSM|HAS_NWAY, 128, },

	{"3c982 Hydra Dual Port B",
	 PCI_USES_MASTER, IS_TORNADO|HAS_HWCKSM|HAS_NWAY, 128, },
	{"3c905B-T4",
	 PCI_USES_MASTER, IS_CYCLONE|HAS_NWAY|HAS_HWCKSM|EXTRA_PREAMBLE, 128, },
	{"3c920B-EMB-WNM Tornado",
	 PCI_USES_MASTER, IS_TORNADO|HAS_NWAY|HAS_HWCKSM, 128, },

	{NULL,}, /* NULL terminated list. */
};


static const struct pci_device_id vortex_pci_tbl[] = {
	{ 0x10B7, 0x5900, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C590 },
	{ 0x10B7, 0x5920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C592 },
	{ 0x10B7, 0x5970, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C597 },
	{ 0x10B7, 0x5950, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C595_1 },
	{ 0x10B7, 0x5951, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C595_2 },

	{ 0x10B7, 0x5952, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C595_3 },
	{ 0x10B7, 0x9000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C900_1 },
	{ 0x10B7, 0x9001, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C900_2 },
	{ 0x10B7, 0x9004, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C900_3 },
	{ 0x10B7, 0x9005, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C900_4 },

	{ 0x10B7, 0x9006, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C900_5 },
	{ 0x10B7, 0x900A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C900B_FL },
	{ 0x10B7, 0x9050, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C905_1 },
	{ 0x10B7, 0x9051, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C905_2 },
	{ 0x10B7, 0x9054, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C905B_TX },
	{ 0x10B7, 0x9055, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C905B_1 },

	{ 0x10B7, 0x9058, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C905B_2 },
	{ 0x10B7, 0x905A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C905B_FX },
	{ 0x10B7, 0x9200, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C905C },
	{ 0x10B7, 0x9202, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C9202 },
	{ 0x10B7, 0x9800, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C980 },
	{ 0x10B7, 0x9805, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C9805 },

	{ 0x10B7, 0x7646, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3CSOHO100_TX },
	{ 0x10B7, 0x5055, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C555 },
	{ 0x10B7, 0x6055, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C556 },
	{ 0x10B7, 0x6056, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C556B },
	{ 0x10B7, 0x5b57, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C575 },

	{ 0x10B7, 0x5057, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C575_1 },
	{ 0x10B7, 0x5157, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3CCFE575 },
	{ 0x10B7, 0x5257, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3CCFE575CT },
	{ 0x10B7, 0x6560, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3CCFE656 },
	{ 0x10B7, 0x6562, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3CCFEM656 },

	{ 0x10B7, 0x6564, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3CCFEM656_1 },
	{ 0x10B7, 0x4500, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C450 },
	{ 0x10B7, 0x9201, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C920 },
	{ 0x10B7, 0x1201, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C982A },
	{ 0x10B7, 0x1202, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C982B },

	{ 0x10B7, 0x9056, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_905BT4 },
	{ 0x10B7, 0x9210, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_920B_EMB_WNM },

	{0,}						/* 0 terminated list. */
};
MODULE_DEVICE_TABLE(pci, vortex_pci_tbl);


/* Operational definitions.
   These are not used by other compilation units and thus are not
   exported in a ".h" file.

   First the windows.  There are eight register windows, with the command
   and status registers available in each.
   */
#define EL3_CMD 0x0e
#define EL3_STATUS 0x0e

/* The top five bits written to EL3_CMD are a command, the lower
   11 bits are the parameter, if applicable.
   Note that 11 parameters bits was fine for ethernet, but the new chip
   can handle FDDI length frames (~4500 octets) and now parameters count
   32-bit 'Dwords' rather than octets. */

enum vortex_cmd {
	TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11,
	RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11,
	UpStall = 6<<11, UpUnstall = (6<<11)+1,
	DownStall = (6<<11)+2, DownUnstall = (6<<11)+3,
	RxDiscard = 8<<11, TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11,
	FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11,
	SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11,
	SetTxThreshold = 18<<11, SetTxStart = 19<<11,
	StartDMAUp = 20<<11, StartDMADown = (20<<11)+1, StatsEnable = 21<<11,
	StatsDisable = 22<<11, StopCoax = 23<<11, SetFilterBit = 25<<11,};

/* The SetRxFilter command accepts the following classes: */
enum RxFilter {
	RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8 };

/* Bits in the general status register. */
enum vortex_status {
	IntLatch = 0x0001, HostError = 0x0002, TxComplete = 0x0004,
	TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
	IntReq = 0x0040, StatsFull = 0x0080,
	DMADone = 1<<8, DownComplete = 1<<9, UpComplete = 1<<10,
	DMAInProgress = 1<<11,			/* DMA controller is still busy.*/
	CmdInProgress = 1<<12,			/* EL3_CMD is still busy.*/
};

/* Register window 1 offsets, the window used in normal operation.
   On the Vortex this window is always mapped at offsets 0x10-0x1f. */
enum Window1 {
	TX_FIFO = 0x10,  RX_FIFO = 0x10,  RxErrors = 0x14,
	RxStatus = 0x18,  Timer=0x1A, TxStatus = 0x1B,
	TxFree = 0x1C, /* Remaining free bytes in Tx buffer. */
};
enum Window0 {
	Wn0EepromCmd = 10,		/* Window 0: EEPROM command register. */
	Wn0EepromData = 12,		/* Window 0: EEPROM results register. */
	IntrStatus=0x0E,		/* Valid in all windows. */
};
enum Win0_EEPROM_bits {
	EEPROM_Read = 0x80, EEPROM_WRITE = 0x40, EEPROM_ERASE = 0xC0,
	EEPROM_EWENB = 0x30,		/* Enable erasing/writing for 10 msec. */
	EEPROM_EWDIS = 0x00,		/* Disable EWENB before 10 msec timeout. */
};
/* EEPROM locations. */
enum eeprom_offset {
	PhysAddr01=0, PhysAddr23=1, PhysAddr45=2, ModelID=3,
	EtherLink3ID=7, IFXcvrIO=8, IRQLine=9,
	NodeAddr01=10, NodeAddr23=11, NodeAddr45=12,
	DriverTune=13, Checksum=15};

enum Window2 {			/* Window 2. */
	Wn2_ResetOptions=12,
};
enum Window3 {			/* Window 3: MAC/config bits. */
	Wn3_Config=0, Wn3_MaxPktSize=4, Wn3_MAC_Ctrl=6, Wn3_Options=8,
};

#define BFEXT(value, offset, bitcount)  \
    ((((unsigned long)(value)) >> (offset)) & ((1 << (bitcount)) - 1))

#define BFINS(lhs, rhs, offset, bitcount)					\
	(((lhs) & ~((((1 << (bitcount)) - 1)) << (offset))) |	\
	(((rhs) & ((1 << (bitcount)) - 1)) << (offset)))

#define RAM_SIZE(v)		BFEXT(v, 0, 3)
#define RAM_WIDTH(v)	BFEXT(v, 3, 1)
#define RAM_SPEED(v)	BFEXT(v, 4, 2)
#define ROM_SIZE(v)		BFEXT(v, 6, 2)
#define RAM_SPLIT(v)	BFEXT(v, 16, 2)
#define XCVR(v)			BFEXT(v, 20, 4)
#define AUTOSELECT(v)	BFEXT(v, 24, 1)

enum Window4 {		/* Window 4: Xcvr/media bits. */
	Wn4_FIFODiag = 4, Wn4_NetDiag = 6, Wn4_PhysicalMgmt=8, Wn4_Media = 10,
};
enum Win4_Media_bits {
	Media_SQE = 0x0008,		/* Enable SQE error counting for AUI. */
	Media_10TP = 0x00C0,	/* Enable link beat and jabber for 10baseT. */
	Media_Lnk = 0x0080,		/* Enable just link beat for 100TX/100FX. */
	Media_LnkBeat = 0x0800,
};
enum Window7 {					/* Window 7: Bus Master control. */
	Wn7_MasterAddr = 0, Wn7_VlanEtherType=4, Wn7_MasterLen = 6,
	Wn7_MasterStatus = 12,
};
/* Boomerang bus master control registers. */
enum MasterCtrl {
	PktStatus = 0x20, DownListPtr = 0x24, FragAddr = 0x28, FragLen = 0x2c,
	TxFreeThreshold = 0x2f, UpPktStatus = 0x30, UpListPtr = 0x38,
};

/* The Rx and Tx descriptor lists.
   Caution Alpha hackers: these types are 32 bits!  Note also the 8 byte
   alignment contraint on tx_ring[] and rx_ring[]. */
#define LAST_FRAG 	0x80000000			/* Last Addr/Len pair in descriptor. */
#define DN_COMPLETE	0x00010000			/* This packet has been downloaded */
struct boom_rx_desc {
	__le32 next;					/* Last entry points to 0.   */
	__le32 status;
	__le32 addr;					/* Up to 63 addr/len pairs possible. */
	__le32 length;					/* Set LAST_FRAG to indicate last pair. */
};
/* Values for the Rx status entry. */
enum rx_desc_status {
	RxDComplete=0x00008000, RxDError=0x4000,
	/* See boomerang_rx() for actual error bits */
	IPChksumErr=1<<25, TCPChksumErr=1<<26, UDPChksumErr=1<<27,
	IPChksumValid=1<<29, TCPChksumValid=1<<30, UDPChksumValid=1<<31,
};

#ifdef MAX_SKB_FRAGS
#define DO_ZEROCOPY 1
#else
#define DO_ZEROCOPY 0
#endif

struct boom_tx_desc {
	__le32 next;					/* Last entry points to 0.   */
	__le32 status;					/* bits 0:12 length, others see below.  */
#if DO_ZEROCOPY
	struct {
		__le32 addr;
		__le32 length;
	} frag[1+MAX_SKB_FRAGS];
#else
		__le32 addr;
		__le32 length;
#endif
};

/* Values for the Tx status entry. */
enum tx_desc_status {
	CRCDisable=0x2000, TxDComplete=0x8000,
	AddIPChksum=0x02000000, AddTCPChksum=0x04000000, AddUDPChksum=0x08000000,
	TxIntrUploaded=0x80000000,		/* IRQ when in FIFO, but maybe not sent. */
};

/* Chip features we care about in vp->capabilities, read from the EEPROM. */
enum ChipCaps { CapBusMaster=0x20, CapPwrMgmt=0x2000 };

struct vortex_extra_stats {
	unsigned long tx_deferred;
	unsigned long tx_max_collisions;
	unsigned long tx_multiple_collisions;
	unsigned long tx_single_collisions;
	unsigned long rx_bad_ssd;
};

struct vortex_private {
	/* The Rx and Tx rings should be quad-word-aligned. */
	struct boom_rx_desc* rx_ring;
	struct boom_tx_desc* tx_ring;
	dma_addr_t rx_ring_dma;
	dma_addr_t tx_ring_dma;
	/* The addresses of transmit- and receive-in-place skbuffs. */
	struct sk_buff* rx_skbuff[RX_RING_SIZE];
	struct sk_buff* tx_skbuff[TX_RING_SIZE];
	unsigned int cur_rx, cur_tx;		/* The next free ring entry */
	unsigned int dirty_rx, dirty_tx;	/* The ring entries to be free()ed. */
	struct vortex_extra_stats xstats;	/* NIC-specific extra stats */
	struct sk_buff *tx_skb;				/* Packet being eaten by bus master ctrl.  */
	dma_addr_t tx_skb_dma;				/* Allocated DMA address for bus master ctrl DMA.   */

	/* PCI configuration space information. */
	struct device *gendev;
	void __iomem *ioaddr;			/* IO address space */
	void __iomem *cb_fn_base;		/* CardBus function status addr space. */

	/* Some values here only for performance evaluation and path-coverage */
	int rx_nocopy, rx_copy, queued_packet, rx_csumhits;
	int card_idx;

	/* The remainder are related to chip state, mostly media selection. */
	struct timer_list timer;			/* Media selection timer. */
	struct timer_list rx_oom_timer;		/* Rx skb allocation retry timer */
	int options;						/* User-settable misc. driver options. */
	unsigned int media_override:4, 		/* Passed-in media type. */
		default_media:4,				/* Read from the EEPROM/Wn3_Config. */
		full_duplex:1, autoselect:1,
		bus_master:1,					/* Vortex can only do a fragment bus-m. */
		full_bus_master_tx:1, full_bus_master_rx:2, /* Boomerang  */
		flow_ctrl:1,					/* Use 802.3x flow control (PAUSE only) */
		partner_flow_ctrl:1,			/* Partner supports flow control */
		has_nway:1,
		enable_wol:1,					/* Wake-on-LAN is enabled */
		pm_state_valid:1,				/* pci_dev->saved_config_space has sane contents */
		open:1,
		medialock:1,
		large_frames:1,			/* accept large frames */
		handling_irq:1;			/* private in_irq indicator */
	/* {get|set}_wol operations are already serialized by rtnl.
	 * no additional locking is required for the enable_wol and acpi_set_WOL()
	 */
	int drv_flags;
	u16 status_enable;
	u16 intr_enable;
	u16 available_media;				/* From Wn3_Options. */
	u16 capabilities, info1, info2;		/* Various, from EEPROM. */
	u16 advertising;					/* NWay media advertisement */
	unsigned char phys[2];				/* MII device addresses. */
	u16 deferred;						/* Resend these interrupts when we
										 * bale from the ISR */
	u16 io_size;						/* Size of PCI region (for release_region) */

	/* Serialises access to hardware other than MII and variables below.
	 * The lock hierarchy is rtnl_lock > {lock, mii_lock} > window_lock. */
	spinlock_t lock;

	spinlock_t mii_lock;		/* Serialises access to MII */
	struct mii_if_info mii;		/* MII lib hooks/info */
	spinlock_t window_lock;		/* Serialises access to windowed regs */
	int window;			/* Register window */
};

static void window_set(struct vortex_private *vp, int window)
{
	if (window != vp->window) {
		iowrite16(SelectWindow + window, vp->ioaddr + EL3_CMD);
		vp->window = window;
	}
}

#define DEFINE_WINDOW_IO(size)						\
static u ## size							\
window_read ## size(struct vortex_private *vp, int window, int addr)	\
{									\
	unsigned long flags;						\
	u ## size ret;							\
	spin_lock_irqsave(&vp->window_lock, flags);			\
	window_set(vp, window);						\
	ret = ioread ## size(vp->ioaddr + addr);			\
	spin_unlock_irqrestore(&vp->window_lock, flags);		\
	return ret;							\
}									\
static void								\
window_write ## size(struct vortex_private *vp, u ## size value,	\
		     int window, int addr)				\
{									\
	unsigned long flags;						\
	spin_lock_irqsave(&vp->window_lock, flags);			\
	window_set(vp, window);						\
	iowrite ## size(value, vp->ioaddr + addr);			\
	spin_unlock_irqrestore(&vp->window_lock, flags);		\
}
DEFINE_WINDOW_IO(8)
DEFINE_WINDOW_IO(16)
DEFINE_WINDOW_IO(32)

#ifdef CONFIG_PCI
#define DEVICE_PCI(dev) ((dev_is_pci(dev)) ? to_pci_dev((dev)) : NULL)
#else
#define DEVICE_PCI(dev) NULL
#endif

#define VORTEX_PCI(vp)							\
	((struct pci_dev *) (((vp)->gendev) ? DEVICE_PCI((vp)->gendev) : NULL))

#ifdef CONFIG_EISA
#define DEVICE_EISA(dev) (((dev)->bus == &eisa_bus_type) ? to_eisa_device((dev)) : NULL)
#else
#define DEVICE_EISA(dev) NULL
#endif

#define VORTEX_EISA(vp)							\
	((struct eisa_device *) (((vp)->gendev) ? DEVICE_EISA((vp)->gendev) : NULL))

/* The action to take with a media selection timer tick.
   Note that we deviate from the 3Com order by checking 10base2 before AUI.
 */
enum xcvr_types {
	XCVR_10baseT=0, XCVR_AUI, XCVR_10baseTOnly, XCVR_10base2, XCVR_100baseTx,
	XCVR_100baseFx, XCVR_MII=6, XCVR_NWAY=8, XCVR_ExtMII=9, XCVR_Default=10,
};

static const struct media_table {
	char *name;
	unsigned int media_bits:16,		/* Bits to set in Wn4_Media register. */
		mask:8,						/* The transceiver-present bit in Wn3_Config.*/
		next:8;						/* The media type to try next. */
	int wait;						/* Time before we check media status. */
} media_tbl[] = {
  {	"10baseT",   Media_10TP,0x08, XCVR_10base2, (14*HZ)/10},
  { "10Mbs AUI", Media_SQE, 0x20, XCVR_Default, (1*HZ)/10},
  { "undefined", 0,			0x80, XCVR_10baseT, 10000},
  { "10base2",   0,			0x10, XCVR_AUI,		(1*HZ)/10},
  { "100baseTX", Media_Lnk, 0x02, XCVR_100baseFx, (14*HZ)/10},
  { "100baseFX", Media_Lnk, 0x04, XCVR_MII,		(14*HZ)/10},
  { "MII",		 0,			0x41, XCVR_10baseT, 3*HZ },
  { "undefined", 0,			0x01, XCVR_10baseT, 10000},
  { "Autonegotiate", 0,		0x41, XCVR_10baseT, 3*HZ},
  { "MII-External",	 0,		0x41, XCVR_10baseT, 3*HZ },
  { "Default",	 0,			0xFF, XCVR_10baseT, 10000},
};

static struct {
	const char str[ETH_GSTRING_LEN];
} ethtool_stats_keys[] = {
	{ "tx_deferred" },
	{ "tx_max_collisions" },
	{ "tx_multiple_collisions" },
	{ "tx_single_collisions" },
	{ "rx_bad_ssd" },
};

/* number of ETHTOOL_GSTATS u64's */
#define VORTEX_NUM_STATS    5

static int vortex_probe1(struct device *gendev, void __iomem *ioaddr, int irq,
				   int chip_idx, int card_idx);
static int vortex_up(struct net_device *dev);
static void vortex_down(struct net_device *dev, int final);
static int vortex_open(struct net_device *dev);
static void mdio_sync(struct vortex_private *vp, int bits);
static int mdio_read(struct net_device *dev, int phy_id, int location);
static void mdio_write(struct net_device *vp, int phy_id, int location, int value);
static void vortex_timer(unsigned long arg);
static void rx_oom_timer(unsigned long arg);
static netdev_tx_t vortex_start_xmit(struct sk_buff *skb,
				     struct net_device *dev);
static netdev_tx_t boomerang_start_xmit(struct sk_buff *skb,
					struct net_device *dev);
static int vortex_rx(struct net_device *dev);
static int boomerang_rx(struct net_device *dev);
static irqreturn_t vortex_interrupt(int irq, void *dev_id);
static irqreturn_t boomerang_interrupt(int irq, void *dev_id);
static int vortex_close(struct net_device *dev);
static void dump_tx_ring(struct net_device *dev);
static void update_stats(void __iomem *ioaddr, struct net_device *dev);
static struct net_device_stats *vortex_get_stats(struct net_device *dev);
static void set_rx_mode(struct net_device *dev);
#ifdef CONFIG_PCI
static int vortex_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
#endif
static void vortex_tx_timeout(struct net_device *dev);
static void acpi_set_WOL(struct net_device *dev);
static const struct ethtool_ops vortex_ethtool_ops;
static void set_8021q_mode(struct net_device *dev, int enable);

/* This driver uses 'options' to pass the media type, full-duplex flag, etc. */
/* Option count limit only -- unlimited interfaces are supported. */
#define MAX_UNITS 8
static int options[MAX_UNITS] = { [0 ... MAX_UNITS-1] = -1 };
static int full_duplex[MAX_UNITS] = {[0 ... MAX_UNITS-1] = -1 };
static int hw_checksums[MAX_UNITS] = {[0 ... MAX_UNITS-1] = -1 };
static int flow_ctrl[MAX_UNITS] = {[0 ... MAX_UNITS-1] = -1 };
static int enable_wol[MAX_UNITS] = {[0 ... MAX_UNITS-1] = -1 };
static int use_mmio[MAX_UNITS] = {[0 ... MAX_UNITS-1] = -1 };
static int global_options = -1;
static int global_full_duplex = -1;
static int global_enable_wol = -1;
static int global_use_mmio = -1;

/* Variables to work-around the Compaq PCI BIOS32 problem. */
static int compaq_ioaddr, compaq_irq, compaq_device_id = 0x5900;
static struct net_device *compaq_net_device;

static int vortex_cards_found;

module_param(debug, int, 0);
module_param(global_options, int, 0);
module_param_array(options, int, NULL, 0);
module_param(global_full_duplex, int, 0);
module_param_array(full_duplex, int, NULL, 0);
module_param_array(hw_checksums, int, NULL, 0);
module_param_array(flow_ctrl, int, NULL, 0);
module_param(global_enable_wol, int, 0);
module_param_array(enable_wol, int, NULL, 0);
module_param(rx_copybreak, int, 0);
module_param(max_interrupt_work, int, 0);
module_param(compaq_ioaddr, int, 0);
module_param(compaq_irq, int, 0);
module_param(compaq_device_id, int, 0);
module_param(watchdog, int, 0);
module_param(global_use_mmio, int, 0);
module_param_array(use_mmio, int, NULL, 0);
MODULE_PARM_DESC(debug, "3c59x debug level (0-6)");
MODULE_PARM_DESC(options, "3c59x: Bits 0-3: media type, bit 4: bus mastering, bit 9: full duplex");
MODULE_PARM_DESC(global_options, "3c59x: same as options, but applies to all NICs if options is unset");
MODULE_PARM_DESC(full_duplex, "3c59x full duplex setting(s) (1)");
MODULE_PARM_DESC(global_full_duplex, "3c59x: same as full_duplex, but applies to all NICs if full_duplex is unset");
MODULE_PARM_DESC(hw_checksums, "3c59x Hardware checksum checking by adapter(s) (0-1)");
MODULE_PARM_DESC(flow_ctrl, "3c59x 802.3x flow control usage (PAUSE only) (0-1)");
MODULE_PARM_DESC(enable_wol, "3c59x: Turn on Wake-on-LAN for adapter(s) (0-1)");
MODULE_PARM_DESC(global_enable_wol, "3c59x: same as enable_wol, but applies to all NICs if enable_wol is unset");
MODULE_PARM_DESC(rx_copybreak, "3c59x copy breakpoint for copy-only-tiny-frames");
MODULE_PARM_DESC(max_interrupt_work, "3c59x maximum events handled per interrupt");
MODULE_PARM_DESC(compaq_ioaddr, "3c59x PCI I/O base address (Compaq BIOS problem workaround)");
MODULE_PARM_DESC(compaq_irq, "3c59x PCI IRQ number (Compaq BIOS problem workaround)");
MODULE_PARM_DESC(compaq_device_id, "3c59x PCI device ID (Compaq BIOS problem workaround)");
MODULE_PARM_DESC(watchdog, "3c59x transmit timeout in milliseconds");
MODULE_PARM_DESC(global_use_mmio, "3c59x: same as use_mmio, but applies to all NICs if options is unset");
MODULE_PARM_DESC(use_mmio, "3c59x: use memory-mapped PCI I/O resource (0-1)");

#ifdef CONFIG_NET_POLL_CONTROLLER
static void poll_vortex(struct net_device *dev)
{
	struct vortex_private *vp = netdev_priv(dev);
	unsigned long flags;
	local_irq_save(flags);
	(vp->full_bus_master_rx ? boomerang_interrupt:vortex_interrupt)(dev->irq,dev);
	local_irq_restore(flags);
}
#endif

#ifdef CONFIG_PM

static int vortex_suspend(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct net_device *ndev = pci_get_drvdata(pdev);

	if (!ndev || !netif_running(ndev))
		return 0;

	netif_device_detach(ndev);
	vortex_down(ndev, 1);

	return 0;
}

static int vortex_resume(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct net_device *ndev = pci_get_drvdata(pdev);
	int err;

	if (!ndev || !netif_running(ndev))
		return 0;

	err = vortex_up(ndev);
	if (err)
		return err;

	netif_device_attach(ndev);

	return 0;
}

static const struct dev_pm_ops vortex_pm_ops = {
	.suspend = vortex_suspend,
	.resume = vortex_resume,
	.freeze = vortex_suspend,
	.thaw = vortex_resume,
	.poweroff = vortex_suspend,
	.restore = vortex_resume,
};

#define VORTEX_PM_OPS (&vortex_pm_ops)

#else /* !CONFIG_PM */

#define VORTEX_PM_OPS NULL

#endif /* !CONFIG_PM */

#ifdef CONFIG_EISA
static struct eisa_device_id vortex_eisa_ids[] = {
	{ "TCM5920", CH_3C592 },
	{ "TCM5970", CH_3C597 },
	{ "" }
};
MODULE_DEVICE_TABLE(eisa, vortex_eisa_ids);

static int __init vortex_eisa_probe(struct device *device)
{
	void __iomem *ioaddr;
	struct eisa_device *edev;

	edev = to_eisa_device(device);

	if (!request_region(edev->base_addr, VORTEX_TOTAL_SIZE, DRV_NAME))
		return -EBUSY;

	ioaddr = ioport_map(edev->base_addr, VORTEX_TOTAL_SIZE);

	if (vortex_probe1(device, ioaddr, ioread16(ioaddr + 0xC88) >> 12,
					  edev->id.driver_data, vortex_cards_found)) {
		release_region(edev->base_addr, VORTEX_TOTAL_SIZE);
		return -ENODEV;
	}

	vortex_cards_found++;

	return 0;
}

static int vortex_eisa_remove(struct device *device)
{
	struct eisa_device *edev;
	struct net_device *dev;
	struct vortex_private *vp;
	void __iomem *ioaddr;

	edev = to_eisa_device(device);
	dev = eisa_get_drvdata(edev);

	if (!dev) {
		pr_err("vortex_eisa_remove called for Compaq device!\n");
		BUG();
	}

	vp = netdev_priv(dev);
	ioaddr = vp->ioaddr;

	unregister_netdev(dev);
	iowrite16(TotalReset|0x14, ioaddr + EL3_CMD);
	release_region(edev->base_addr, VORTEX_TOTAL_SIZE);

	free_netdev(dev);
	return 0;
}

static struct eisa_driver vortex_eisa_driver = {
	.id_table = vortex_eisa_ids,
	.driver   = {
		.name    = "3c59x",
		.probe   = vortex_eisa_probe,
		.remove  = vortex_eisa_remove
	}
};

#endif /* CONFIG_EISA */

/* returns count found (>= 0), or negative on error */
static int __init vortex_eisa_init(void)
{
	int eisa_found = 0;
	int orig_cards_found = vortex_cards_found;

#ifdef CONFIG_EISA
	int err;

	err = eisa_driver_register (&vortex_eisa_driver);
	if (!err) {
		/*
		 * Because of the way EISA bus is probed, we cannot assume
		 * any device have been found when we exit from
		 * eisa_driver_register (the bus root driver may not be
		 * initialized yet). So we blindly assume something was
		 * found, and let the sysfs magic happened...
		 */
		eisa_found = 1;
	}
#endif

	/* Special code to work-around the Compaq PCI BIOS32 problem. */
	if (compaq_ioaddr) {
		vortex_probe1(NULL, ioport_map(compaq_ioaddr, VORTEX_TOTAL_SIZE),
			      compaq_irq, compaq_device_id, vortex_cards_found++);
	}

	return vortex_cards_found - orig_cards_found + eisa_found;
}

/* returns count (>= 0), or negative on error */
static int vortex_init_one(struct pci_dev *pdev,
			   const struct pci_device_id *ent)
{
	int rc, unit, pci_bar;
	struct vortex_chip_info *vci;
	void __iomem *ioaddr;

	/* wake up and enable device */
	rc = pci_enable_device(pdev);
	if (rc < 0)
		goto out;

	rc = pci_request_regions(pdev, DRV_NAME);
	if (rc < 0)
		goto out_disable;

	unit = vortex_cards_found;

	if (global_use_mmio < 0 && (unit >= MAX_UNITS || use_mmio[unit] < 0)) {
		/* Determine the default if the user didn't override us */
		vci = &vortex_info_tbl[ent->driver_data];
		pci_bar = vci->drv_flags & (IS_CYCLONE | IS_TORNADO) ? 1 : 0;
	} else if (unit < MAX_UNITS && use_mmio[unit] >= 0)
		pci_bar = use_mmio[unit] ? 1 : 0;
	else
		pci_bar = global_use_mmio ? 1 : 0;

	ioaddr = pci_iomap(pdev, pci_bar, 0);
	if (!ioaddr) /* If mapping fails, fall-back to BAR 0... */
		ioaddr = pci_iomap(pdev, 0, 0);
	if (!ioaddr) {
		rc = -ENOMEM;
		goto out_release;
	}

	rc = vortex_probe1(&pdev->dev, ioaddr, pdev->irq,
			   ent->driver_data, unit);
	if (rc < 0)
		goto out_iounmap;

	vortex_cards_found++;
	goto out;

out_iounmap:
	pci_iounmap(pdev, ioaddr);
out_release:
	pci_release_regions(pdev);
out_disable:
	pci_disable_device(pdev);
out:
	return rc;
}

static const struct net_device_ops boomrang_netdev_ops = {
	.ndo_open		= vortex_open,
	.ndo_stop		= vortex_close,
	.ndo_start_xmit		= boomerang_start_xmit,
	.ndo_tx_timeout		= vortex_tx_timeout,
	.ndo_get_stats		= vortex_get_stats,
#ifdef CONFIG_PCI
	.ndo_do_ioctl 		= vortex_ioctl,
#endif
	.ndo_set_rx_mode	= set_rx_mode,
	.ndo_change_mtu		= eth_change_mtu,
	.ndo_set_mac_address 	= eth_mac_addr,
	.ndo_validate_addr	= eth_validate_addr,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= poll_vortex,
#endif
};

static const struct net_device_ops vortex_netdev_ops = {
	.ndo_open		= vortex_open,
	.ndo_stop		= vortex_close,
	.ndo_start_xmit		= vortex_start_xmit,
	.ndo_tx_timeout		= vortex_tx_timeout,
	.ndo_get_stats		= vortex_get_stats,
#ifdef CONFIG_PCI
	.ndo_do_ioctl 		= vortex_ioctl,
#endif
	.ndo_set_rx_mode	= set_rx_mode,
	.ndo_change_mtu		= eth_change_mtu,
	.ndo_set_mac_address 	= eth_mac_addr,
	.ndo_validate_addr	= eth_validate_addr,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= poll_vortex,
#endif
};

/*
 * Start up the PCI/EISA device which is described by *gendev.
 * Return 0 on success.
 *
 * NOTE: pdev can be NULL, for the case of a Compaq device
 */
static int vortex_probe1(struct device *gendev, void __iomem *ioaddr, int irq,
			 int chip_idx, int card_idx)
{
	struct vortex_private *vp;
	int option;
	unsigned int eeprom[0x40], checksum = 0;		/* EEPROM contents */
	int i, step;
	struct net_device *dev;
	static int printed_version;
	int retval, print_info;
	struct vortex_chip_info * const vci = &vortex_info_tbl[chip_idx];
	const char *print_name = "3c59x";
	struct pci_dev *pdev = NULL;
	struct eisa_device *edev = NULL;

	if (!printed_version) {
		pr_info("%s", version);
		printed_version = 1;
	}

	if (gendev) {
		if ((pdev = DEVICE_PCI(gendev))) {
			print_name = pci_name(pdev);
		}

		if ((edev = DEVICE_EISA(gendev))) {
			print_name = dev_name(&edev->dev);
		}
	}

	dev = alloc_etherdev(sizeof(*vp));
	retval = -ENOMEM;
	if (!dev)
		goto out;

	SET_NETDEV_DEV(dev, gendev);
	vp = netdev_priv(dev);

	option = global_options;

	/* The lower four bits are the media type. */
	if (dev->mem_start) {
		/*
		 * The 'options' param is passed in as the third arg to the
		 * LILO 'ether=' argument for non-modular use
		 */
		option = dev->mem_start;
	}
	else if (card_idx < MAX_UNITS) {
		if (options[card_idx] >= 0)
			option = options[card_idx];
	}

	if (option > 0) {
		if (option & 0x8000)
			vortex_debug = 7;
		if (option & 0x4000)
			vortex_debug = 2;
		if (option & 0x0400)
			vp->enable_wol = 1;
	}

	print_info = (vortex_debug > 1);
	if (print_info)
		pr_info("See Documentation/networking/vortex.txt\n");

	pr_info("%s: 3Com %s %s at %p.\n",
	       print_name,
	       pdev ? "PCI" : "EISA",
	       vci->name,
	       ioaddr);

	dev->base_addr = (unsigned long)ioaddr;
	dev->irq = irq;
	dev->mtu = mtu;
	vp->ioaddr = ioaddr;
	vp->large_frames = mtu > 1500;
	vp->drv_flags = vci->drv_flags;
	vp->has_nway = (vci->drv_flags & HAS_NWAY) ? 1 : 0;
	vp->io_size = vci->io_size;
	vp->card_idx = card_idx;
	vp->window = -1;

	/* module list only for Compaq device */
	if (gendev == NULL) {
		compaq_net_device = dev;
	}

	/* PCI-only startup logic */
	if (pdev) {
		/* enable bus-mastering if necessary */
		if (vci->flags & PCI_USES_MASTER)
			pci_set_master(pdev);

		if (vci->drv_flags & IS_VORTEX) {
			u8 pci_latency;
			u8 new_latency = 248;

			/* Check the PCI latency value.  On the 3c590 series the latency timer
			   must be set to the maximum value to avoid data corruption that occurs
			   when the timer expires during a transfer.  This bug exists the Vortex
			   chip only. */
			pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &pci_latency);
			if (pci_latency < new_latency) {
				pr_info("%s: Overriding PCI latency timer (CFLT) setting of %d, new value is %d.\n",
					print_name, pci_latency, new_latency);
				pci_write_config_byte(pdev, PCI_LATENCY_TIMER, new_latency);
			}
		}
	}

	spin_lock_init(&vp->lock);
	spin_lock_init(&vp->mii_lock);
	spin_lock_init(&vp->window_lock);
	vp->gendev = gendev;
	vp->mii.dev = dev;
	vp->mii.mdio_read = mdio_read;
	vp->mii.mdio_write = mdio_write;
	vp->mii.phy_id_mask = 0x1f;
	vp->mii.reg_num_mask = 0x1f;

	/* Makes sure rings are at least 16 byte aligned. */
	vp->rx_ring = pci_alloc_consistent(pdev, sizeof(struct boom_rx_desc) * RX_RING_SIZE
					   + sizeof(struct boom_tx_desc) * TX_RING_SIZE,
					   &vp->rx_ring_dma);
	retval = -ENOMEM;
	if (!vp->rx_ring)
		goto free_device;

	vp->tx_ring = (struct boom_tx_desc *)(vp->rx_ring + RX_RING_SIZE);
	vp->tx_ring_dma = vp->rx_ring_dma + sizeof(struct boom_rx_desc) * RX_RING_SIZE;

	/* if we are a PCI driver, we store info in pdev->driver_data
	 * instead of a module list */
	if (pdev)
		pci_set_drvdata(pdev, dev);
	if (edev)
		eisa_set_drvdata(edev, dev);

	vp->media_override = 7;
	if (option >= 0) {
		vp->media_override = ((option & 7) == 2)  ?  0  :  option & 15;
		if (vp->media_override != 7)
			vp->medialock = 1;
		vp->full_duplex = (option & 0x200) ? 1 : 0;
		vp->bus_master = (option & 16) ? 1 : 0;
	}

	if (global_full_duplex > 0)
		vp->full_duplex = 1;
	if (global_enable_wol > 0)
		vp->enable_wol = 1;

	if (card_idx < MAX_UNITS) {
		if (full_duplex[card_idx] > 0)
			vp->full_duplex = 1;
		if (flow_ctrl[card_idx] > 0)
			vp->flow_ctrl = 1;
		if (enable_wol[card_idx] > 0)
			vp->enable_wol = 1;
	}

	vp->mii.force_media = vp->full_duplex;
	vp->options = option;
	/* Read the station address from the EEPROM. */
	{
		int base;

		if (vci->drv_flags & EEPROM_8BIT)
			base = 0x230;
		else if (vci->drv_flags & EEPROM_OFFSET)
			base = EEPROM_Read + 0x30;
		else
			base = EEPROM_Read;

		for (i = 0; i < 0x40; i++) {
			int timer;
			window_write16(vp, base + i, 0, Wn0EepromCmd);
			/* Pause for at least 162 us. for the read to take place. */
			for (timer = 10; timer >= 0; timer--) {
				udelay(162);
				if ((window_read16(vp, 0, Wn0EepromCmd) &
				     0x8000) == 0)
					break;
			}
			eeprom[i] = window_read16(vp, 0, Wn0EepromData);
		}
	}
	for (i = 0; i < 0x18; i++)
		checksum ^= eeprom[i];
	checksum = (checksum ^ (checksum >> 8)) & 0xff;
	if (checksum != 0x00) {		/* Grrr, needless incompatible change 3Com. */
		while (i < 0x21)
			checksum ^= eeprom[i++];
		checksum = (checksum ^ (checksum >> 8)) & 0xff;
	}
	if ((checksum != 0x00) && !(vci->drv_flags & IS_TORNADO))
		pr_cont(" ***INVALID CHECKSUM %4.4x*** ", checksum);
	for (i = 0; i < 3; i++)
		((__be16 *)dev->dev_addr)[i] = htons(eeprom[i + 10]);
	if (print_info)
		pr_cont(" %pM", dev->dev_addr);
	/* Unfortunately an all zero eeprom passes the checksum and this
	   gets found in the wild in failure cases. Crypto is hard 8) */
	if (!is_valid_ether_addr(dev->dev_addr)) {
		retval = -EINVAL;
		pr_err("*** EEPROM MAC address is invalid.\n");
		goto free_ring;	/* With every pack */
	}
	for (i = 0; i < 6; i++)
		window_write8(vp, dev->dev_addr[i], 2, i);

	if (print_info)
		pr_cont(", IRQ %d\n", dev->irq);
	/* Tell them about an invalid IRQ. */
	if (dev->irq <= 0 || dev->irq >= nr_irqs)
		pr_warn(" *** Warning: IRQ %d is unlikely to work! ***\n",
			dev->irq);

	step = (window_read8(vp, 4, Wn4_NetDiag) & 0x1e) >> 1;
	if (print_info) {
		pr_info("  product code %02x%02x rev %02x.%d date %02d-%02d-%02d\n",
			eeprom[6]&0xff, eeprom[6]>>8, eeprom[0x14],
			step, (eeprom[4]>>5) & 15, eeprom[4] & 31, eeprom[4]>>9);
	}


	if (pdev && vci->drv_flags & HAS_CB_FNS) {
		unsigned short n;

		vp->cb_fn_base = pci_iomap(pdev, 2, 0);
		if (!vp->cb_fn_base) {
			retval = -ENOMEM;
			goto free_ring;
		}

		if (print_info) {
			pr_info("%s: CardBus functions mapped %16.16llx->%p\n",
				print_name,
				(unsigned long long)pci_resource_start(pdev, 2),
				vp->cb_fn_base);
		}

		n = window_read16(vp, 2, Wn2_ResetOptions) & ~0x4010;
		if (vp->drv_flags & INVERT_LED_PWR)
			n |= 0x10;
		if (vp->drv_flags & INVERT_MII_PWR)
			n |= 0x4000;
		window_write16(vp, n, 2, Wn2_ResetOptions);
		if (vp->drv_flags & WNO_XCVR_PWR) {
			window_write16(vp, 0x0800, 0, 0);
		}
	}

	/* Extract our information from the EEPROM data. */
	vp->info1 = eeprom[13];
	vp->info2 = eeprom[15];
	vp->capabilities = eeprom[16];

	if (vp->info1 & 0x8000) {
		vp->full_duplex = 1;
		if (print_info)
			pr_info("Full duplex capable\n");
	}

	{
		static const char * const ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
		unsigned int config;
		vp->available_media = window_read16(vp, 3, Wn3_Options);
		if ((vp->available_media & 0xff) == 0)		/* Broken 3c916 */
			vp->available_media = 0x40;
		config = window_read32(vp, 3, Wn3_Config);
		if (print_info) {
			pr_debug("  Internal config register is %4.4x, transceivers %#x.\n",
				config, window_read16(vp, 3, Wn3_Options));
			pr_info("  %dK %s-wide RAM %s Rx:Tx split, %s%s interface.\n",
				   8 << RAM_SIZE(config),
				   RAM_WIDTH(config) ? "word" : "byte",
				   ram_split[RAM_SPLIT(config)],
				   AUTOSELECT(config) ? "autoselect/" : "",
				   XCVR(config) > XCVR_ExtMII ? "<invalid transceiver>" :
				   media_tbl[XCVR(config)].name);
		}
		vp->default_media = XCVR(config);
		if (vp->default_media == XCVR_NWAY)
			vp->has_nway = 1;
		vp->autoselect = AUTOSELECT(config);
	}

	if (vp->media_override != 7) {
		pr_info("%s:  Media override to transceiver type %d (%s).\n",
				print_name, vp->media_override,
				media_tbl[vp->media_override].name);
		dev->if_port = vp->media_override;
	} else
		dev->if_port = vp->default_media;

	if ((vp->available_media & 0x40) || (vci->drv_flags & HAS_NWAY) ||
		dev->if_port == XCVR_MII || dev->if_port == XCVR_NWAY) {
		int phy, phy_idx = 0;
		mii_preamble_required++;
		if (vp->drv_flags & EXTRA_PREAMBLE)
			mii_preamble_required++;
		mdio_sync(vp, 32);
		mdio_read(dev, 24, MII_BMSR);
		for (phy = 0; phy < 32 && phy_idx < 1; phy++) {
			int mii_status, phyx;

			/*
			 * For the 3c905CX we look at index 24 first, because it bogusly
			 * reports an external PHY at all indices
			 */
			if (phy == 0)
				phyx = 24;
			else if (phy <= 24)
				phyx = phy - 1;
			else
				phyx = phy;
			mii_status = mdio_read(dev, phyx, MII_BMSR);
			if (mii_status  &&  mii_status != 0xffff) {
				vp->phys[phy_idx++] = phyx;
				if (print_info) {
					pr_info("  MII transceiver found at address %d, status %4x.\n",
						phyx, mii_status);
				}
				if ((mii_status & 0x0040) == 0)
					mii_preamble_required++;
			}
		}
		mii_preamble_required--;
		if (phy_idx == 0) {
			pr_warn("  ***WARNING*** No MII transceivers found!\n");
			vp->phys[0] = 24;
		} else {
			vp->advertising = mdio_read(dev, vp->phys[0], MII_ADVERTISE);
			if (vp->full_duplex) {
				/* Only advertise the FD media types. */
				vp->advertising &= ~0x02A0;
				mdio_write(dev, vp->phys[0], 4, vp->advertising);
			}
		}
		vp->mii.phy_id = vp->phys[0];
	}

	if (vp->capabilities & CapBusMaster) {
		vp->full_bus_master_tx = 1;
		if (print_info) {
			pr_info("  Enabling bus-master transmits and %s receives.\n",
			(vp->info2 & 1) ? "early" : "whole-frame" );
		}
		vp->full_bus_master_rx = (vp->info2 & 1) ? 1 : 2;
		vp->bus_master = 0;		/* AKPM: vortex only */
	}

	/* The 3c59x-specific entries in the device structure. */
	if (vp->full_bus_master_tx) {
		dev->netdev_ops = &boomrang_netdev_ops;
		/* Actually, it still should work with iommu. */
		if (card_idx < MAX_UNITS &&
		    ((hw_checksums[card_idx] == -1 && (vp->drv_flags & HAS_HWCKSM)) ||
				hw_checksums[card_idx] == 1)) {
			dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG;
		}
	} else
		dev->netdev_ops =  &vortex_netdev_ops;

	if (print_info) {
		pr_info("%s: scatter/gather %sabled. h/w checksums %sabled\n",
				print_name,
				(dev->features & NETIF_F_SG) ? "en":"dis",
				(dev->features & NETIF_F_IP_CSUM) ? "en":"dis");
	}

	dev->ethtool_ops = &vortex_ethtool_ops;
	dev->watchdog_timeo = (watchdog * HZ) / 1000;

	if (pdev) {
		vp->pm_state_valid = 1;
		pci_save_state(pdev);
 		acpi_set_WOL(dev);
	}
	retval = register_netdev(dev);
	if (retval == 0)
		return 0;

free_ring:
	pci_free_consistent(pdev,
						sizeof(struct boom_rx_desc) * RX_RING_SIZE
							+ sizeof(struct boom_tx_desc) * TX_RING_SIZE,
						vp->rx_ring,
						vp->rx_ring_dma);
free_device:
	free_netdev(dev);
	pr_err(PFX "vortex_probe1 fails.  Returns %d\n", retval);
out:
	return retval;
}

static void
issue_and_wait(struct net_device *dev, int cmd)
{
	struct vortex_private *vp = netdev_priv(dev);
	void __iomem *ioaddr = vp->ioaddr;
	int i;

	iowrite16(cmd, ioaddr + EL3_CMD);
	for (i = 0; i < 2000; i++) {
		if (!(ioread16(ioaddr + EL3_STATUS) & CmdInProgress))
			return;
	}

	/* OK, that didn't work.  Do it the slow way.  One second */
	for (i = 0; i < 100000; i++) {
		if (!(ioread16(ioaddr + EL3_STATUS) & CmdInProgress)) {
			if (vortex_debug > 1)
				pr_info("%s: command 0x%04x took %d usecs\n",
					   dev->name, cmd, i * 10);
			return;
		}
		udelay(10);
	}
	pr_err("%s: command 0x%04x did not complete! Status=0x%x\n",
			   dev->name, cmd, ioread16(ioaddr + EL3_STATUS));
}

static void
vortex_set_duplex(struct net_device *dev)
{
	struct vortex_private *vp = netdev_priv(dev);

	pr_info("%s:  setting %s-duplex.\n",
		dev->name, (vp->full_duplex) ? "full" : "half");

	/* Set the full-duplex bit. */
	window_write16(vp,
		       ((vp->info1 & 0x8000) || vp->full_duplex ? 0x20 : 0) |
		       (vp->large_frames ? 0x40 : 0) |
		       ((vp->full_duplex && vp->flow_ctrl && vp->partner_flow_ctrl) ?
			0x100 : 0),
		       3, Wn3_MAC_Ctrl);
}

static void vortex_check_media(struct net_device *dev, unsigned int init)
{
	struct vortex_private *vp = netdev_priv(dev);
	unsigned int ok_to_print = 0;

	if (vortex_debug > 3)
		ok_to_print = 1;

	if (mii_check_media(&vp->mii, ok_to_print, init)) {
		vp->full_duplex = vp->mii.full_duplex;
		vortex_set_duplex(dev);
	} else if (init) {
		vortex_set_duplex(dev);
	}
}

static int
vortex_up(struct net_device *dev)
{
	struct vortex_private *vp = netdev_priv(dev);
	void __iomem *ioaddr = vp->ioaddr;
	unsigned int config;
	int i, mii_reg1, mii_reg5, err = 0;

	if (VORTEX_PCI(vp)) {
		pci_set_power_state(VORTEX_PCI(vp), PCI_D0);	/* Go active */
		if (vp->pm_state_valid)
			pci_restore_state(VORTEX_PCI(vp));
		err = pci_enable_device(VORTEX_PCI(vp));
		if (err) {
			pr_warn("%s: Could not enable device\n", dev->name);
			goto err_out;
		}
	}

	/* Before initializing select the active media port. */
	config = window_read32(vp, 3, Wn3_Config);

	if (vp->media_override != 7) {
		pr_info("%s: Media override to transceiver %d (%s).\n",
			   dev->name, vp->media_override,
			   media_tbl[vp->media_override].name);
		dev->if_port = vp->media_override;
	} else if (vp->autoselect) {
		if (vp->has_nway) {
			if (vortex_debug > 1)
				pr_info("%s: using NWAY device table, not %d\n",
								dev->name, dev->if_port);
			dev->if_port = XCVR_NWAY;
		} else {
			/* Find first available media type, starting with 100baseTx. */
			dev->if_port = XCVR_100baseTx;
			while (! (vp->available_media & media_tbl[dev->if_port].mask))
				dev->if_port = media_tbl[dev->if_port].next;
			if (vortex_debug > 1)
				pr_info("%s: first available media type: %s\n",
					dev->name, media_tbl[dev->if_port].name);
		}
	} else {
		dev->if_port = vp->default_media;
		if (vortex_debug > 1)
			pr_info("%s: using default media %s\n",
				dev->name, media_tbl[dev->if_port].name);
	}

	init_timer(&vp->timer);
	vp->timer.expires = RUN_AT(media_tbl[dev->if_port].wait);
	vp->timer.data = (unsigned long)dev;
	vp->timer.function = vortex_timer;		/* timer handler */
	add_timer(&vp->timer);

	init_timer(&vp->rx_oom_timer);
	vp->rx_oom_timer.data = (unsigned long)dev;
	vp->rx_oom_timer.function = rx_oom_timer;

	if (vortex_debug > 1)
		pr_debug("%s: Initial media type %s.\n",
			   dev->name, media_tbl[dev->if_port].name);

	vp->full_duplex = vp->mii.force_media;
	config = BFINS(config, dev->if_port, 20, 4);
	if (vortex_debug > 6)
		pr_debug("vortex_up(): writing 0x%x to InternalConfig\n", config);
	window_write32(vp, config, 3, Wn3_Config);

	if (dev->if_port == XCVR_MII || dev->if_port == XCVR_NWAY) {
		mii_reg1 = mdio_read(dev, vp->phys[0], MII_BMSR);
		mii_reg5 = mdio_read(dev, vp->phys[0], MII_LPA);
		vp->partner_flow_ctrl = ((mii_reg5 & 0x0400) != 0);
		vp->mii.full_duplex = vp->full_duplex;

		vortex_check_media(dev, 1);
	}
	else
		vortex_set_duplex(dev);

	issue_and_wait(dev, TxReset);
	/*
	 * Don't reset the PHY - that upsets autonegotiation during DHCP operations.
	 */
	issue_and_wait(dev, RxReset|0x04);


	iowrite16(SetStatusEnb | 0x00, ioaddr + EL3_CMD);

	if (vortex_debug > 1) {
		pr_debug("%s: vortex_up() irq %d media status %4.4x.\n",
			   dev->name, dev->irq, window_read16(vp, 4, Wn4_Media));
	}

	/* Set the station address and mask in window 2 each time opened. */
	for (i = 0; i < 6; i++)
		window_write8(vp, dev->dev_addr[i], 2, i);
	for (; i < 12; i+=2)
		window_write16(vp, 0, 2, i);

	if (vp->cb_fn_base) {
		unsigned short n = window_read16(vp, 2, Wn2_ResetOptions) & ~0x4010;
		if (vp->drv_flags & INVERT_LED_PWR)
			n |= 0x10;
		if (vp->drv_flags & INVERT_MII_PWR)
			n |= 0x4000;
		window_write16(vp, n, 2, Wn2_ResetOptions);
	}

	if (dev->if_port == XCVR_10base2)
		/* Start the thinnet transceiver. We should really wait 50ms...*/
		iowrite16(StartCoax, ioaddr + EL3_CMD);
	if (dev->if_port != XCVR_NWAY) {
		window_write16(vp,
			       (window_read16(vp, 4, Wn4_Media) &
				~(Media_10TP|Media_SQE)) |
			       media_tbl[dev->if_port].media_bits,
			       4, Wn4_Media);
	}

	/* Switch to the stats window, and clear all stats by reading. */
	iowrite16(StatsDisable, ioaddr + EL3_CMD);
	for (i = 0; i < 10; i++)
		window_read8(vp, 6, i);
	window_read16(vp, 6, 10);
	window_read16(vp, 6, 12);
	/* New: On the Vortex we must also clear the BadSSD counter. */
	window_read8(vp, 4, 12);
	/* ..and on the Boomerang we enable the extra statistics bits. */
	window_write16(vp, 0x0040, 4, Wn4_NetDiag);

	if (vp->full_bus_master_rx) { /* Boomerang bus master. */
		vp->cur_rx = vp->dirty_rx = 0;
		/* Initialize the RxEarly register as recommended. */
		iowrite16(SetRxThreshold + (1536>>2), ioaddr + EL3_CMD);
		iowrite32(0x0020, ioaddr + PktStatus);
		iowrite32(vp->rx_ring_dma, ioaddr + UpListPtr);
	}
	if (vp->full_bus_master_tx) { 		/* Boomerang bus master Tx. */
		vp->cur_tx = vp->dirty_tx = 0;
		if (vp->drv_flags & IS_BOOMERANG)
			iowrite8(PKT_BUF_SZ>>8, ioaddr + TxFreeThreshold); /* Room for a packet. */
		/* Clear the Rx, Tx rings. */
		for (i = 0; i < RX_RING_SIZE; i++)	/* AKPM: this is done in vortex_open, too */
			vp->rx_ring[i].status = 0;
		for (i = 0; i < TX_RING_SIZE; i++)
			vp->tx_skbuff[i] = NULL;
		iowrite32(0, ioaddr + DownListPtr);
	}
	/* Set receiver mode: presumably accept b-case and phys addr only. */
	set_rx_mode(dev);
	/* enable 802.1q tagged frames */
	set_8021q_mode(dev, 1);
	iowrite16(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */

	iowrite16(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
	iowrite16(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
	/* Allow status bits to be seen. */
	vp->status_enable = SetStatusEnb | HostError|IntReq|StatsFull|TxComplete|
		(vp->full_bus_master_tx ? DownComplete : TxAvailable) |
		(vp->full_bus_master_rx ? UpComplete : RxComplete) |
		(vp->bus_master ? DMADone : 0);
	vp->intr_enable = SetIntrEnb | IntLatch | TxAvailable |
		(vp->full_bus_master_rx ? 0 : RxComplete) |
		StatsFull | HostError | TxComplete | IntReq
		| (vp->bus_master ? DMADone : 0) | UpComplete | DownComplete;
	iowrite16(vp->status_enable, ioaddr + EL3_CMD);
	/* Ack all pending events, and set active indicator mask. */
	iowrite16(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
		 ioaddr + EL3_CMD);
	iowrite16(vp->intr_enable, ioaddr + EL3_CMD);
	if (vp->cb_fn_base)			/* The PCMCIA people are idiots.  */
		iowrite32(0x8000, vp->cb_fn_base + 4);
	netif_start_queue (dev);
err_out:
	return err;
}

static int
vortex_open(struct net_device *dev)
{
	struct vortex_private *vp = netdev_priv(dev);
	int i;
	int retval;

	/* Use the now-standard shared IRQ implementation. */
	if ((retval = request_irq(dev->irq, vp->full_bus_master_rx ?
				boomerang_interrupt : vortex_interrupt, IRQF_SHARED, dev->name, dev))) {
		pr_err("%s: Could not reserve IRQ %d\n", dev->name, dev->irq);
		goto err;
	}

	if (vp->full_bus_master_rx) { /* Boomerang bus master. */
		if (vortex_debug > 2)
			pr_debug("%s:  Filling in the Rx ring.\n", dev->name);
		for (i = 0; i < RX_RING_SIZE; i++) {
			struct sk_buff *skb;
			vp->rx_ring[i].next = cpu_to_le32(vp->rx_ring_dma + sizeof(struct boom_rx_desc) * (i+1));
			vp->rx_ring[i].status = 0;	/* Clear complete bit. */
			vp->rx_ring[i].length = cpu_to_le32(PKT_BUF_SZ | LAST_FRAG);

			skb = __netdev_alloc_skb(dev, PKT_BUF_SZ + NET_IP_ALIGN,
						 GFP_KERNEL);
			vp->rx_skbuff[i] = skb;
			if (skb == NULL)
				break;			/* Bad news!  */

			skb_reserve(skb, NET_IP_ALIGN);	/* Align IP on 16 byte boundaries */
			vp->rx_ring[i].addr = cpu_to_le32(pci_map_single(VORTEX_PCI(vp), skb->data, PKT_BUF_SZ, PCI_DMA_FROMDEVICE));
		}
		if (i != RX_RING_SIZE) {
			int j;
			pr_emerg("%s: no memory for rx ring\n", dev->name);
			for (j = 0; j < i; j++) {
				if (vp->rx_skbuff[j]) {
					dev_kfree_skb(vp->rx_skbuff[j]);
					vp->rx_skbuff[j] = NULL;
				}
			}
			retval = -ENOMEM;
			goto err_free_irq;
		}
		/* Wrap the ring. */
		vp->rx_ring[i-1].next = cpu_to_le32(vp->rx_ring_dma);
	}

	retval = vortex_up(dev);
	if (!retval)
		goto out;

err_free_irq:
	free_irq(dev->irq, dev);
err:
	if (vortex_debug > 1)
		pr_err("%s: vortex_open() fails: returning %d\n", dev->name, retval);
out:
	return retval;
}

static void
vortex_timer(unsigned long data)
{
	struct net_device *dev = (struct net_device *)data;
	struct vortex_private *vp = netdev_priv(dev);
	void __iomem *ioaddr = vp->ioaddr;
	int next_tick = 60*HZ;
	int ok = 0;
	int media_status;

	if (vortex_debug > 2) {
		pr_debug("%s: Media selection timer tick happened, %s.\n",
			   dev->name, media_tbl[dev->if_port].name);
		pr_debug("dev->watchdog_timeo=%d\n", dev->watchdog_timeo);
	}

	media_status = window_read16(vp, 4, Wn4_Media);
	switch (dev->if_port) {
	case XCVR_10baseT:  case XCVR_100baseTx:  case XCVR_100baseFx:
		if (media_status & Media_LnkBeat) {
			netif_carrier_on(dev);
			ok = 1;
			if (vortex_debug > 1)
				pr_debug("%s: Media %s has link beat, %x.\n",
					   dev->name, media_tbl[dev->if_port].name, media_status);
		} else {
			netif_carrier_off(dev);
			if (vortex_debug > 1) {
				pr_debug("%s: Media %s has no link beat, %x.\n",
					   dev->name, media_tbl[dev->if_port].name, media_status);
			}
		}
		break;
	case XCVR_MII: case XCVR_NWAY:
		{
			ok = 1;
			vortex_check_media(dev, 0);
		}
		break;
	  default:					/* Other media types handled by Tx timeouts. */
		if (vortex_debug > 1)
		  pr_debug("%s: Media %s has no indication, %x.\n",
				 dev->name, media_tbl[dev->if_port].name, media_status);
		ok = 1;
	}

	if (dev->flags & IFF_SLAVE || !netif_carrier_ok(dev))
		next_tick = 5*HZ;

	if (vp->medialock)
		goto leave_media_alone;

	if (!ok) {
		unsigned int config;

		spin_lock_irq(&vp->lock);

		do {
			dev->if_port = media_tbl[dev->if_port].next;
		} while ( ! (vp->available_media & media_tbl[dev->if_port].mask));
		if (dev->if_port == XCVR_Default) { /* Go back to default. */
		  dev->if_port = vp->default_media;
		  if (vortex_debug > 1)
			pr_debug("%s: Media selection failing, using default %s port.\n",
				   dev->name, media_tbl[dev->if_port].name);
		} else {
			if (vortex_debug > 1)
				pr_debug("%s: Media selection failed, now trying %s port.\n",
					   dev->name, media_tbl[dev->if_port].name);
			next_tick = media_tbl[dev->if_port].wait;
		}
		window_write16(vp,
			       (media_status & ~(Media_10TP|Media_SQE)) |
			       media_tbl[dev->if_port].media_bits,
			       4, Wn4_Media);

		config = window_read32(vp, 3, Wn3_Config);
		config = BFINS(config, dev->if_port, 20, 4);
		window_write32(vp, config, 3, Wn3_Config);

		iowrite16(dev->if_port == XCVR_10base2 ? StartCoax : StopCoax,
			 ioaddr + EL3_CMD);
		if (vortex_debug > 1)
			pr_debug("wrote 0x%08x to Wn3_Config\n", config);
		/* AKPM: FIXME: Should reset Rx & Tx here.  P60 of 3c90xc.pdf */

		spin_unlock_irq(&vp->lock);
	}

leave_media_alone:
	if (vortex_debug > 2)
	  pr_debug("%s: Media selection timer finished, %s.\n",
			 dev->name, media_tbl[dev->if_port].name);

	mod_timer(&vp->timer, RUN_AT(next_tick));
	if (vp->deferred)
		iowrite16(FakeIntr, ioaddr + EL3_CMD);
}

static void vortex_tx_timeout(struct net_device *dev)
{
	struct vortex_private *vp = netdev_priv(dev);
	void __iomem *ioaddr = vp->ioaddr;

	pr_err("%s: transmit timed out, tx_status %2.2x status %4.4x.\n",
		   dev->name, ioread8(ioaddr + TxStatus),
		   ioread16(ioaddr + EL3_STATUS));
	pr_err("  diagnostics: net %04x media %04x dma %08x fifo %04x\n",
			window_read16(vp, 4, Wn4_NetDiag),
			window_read16(vp, 4, Wn4_Media),
			ioread32(ioaddr + PktStatus),
			window_read16(vp, 4, Wn4_FIFODiag));
	/* Slight code bloat to be user friendly. */
	if ((ioread8(ioaddr + TxStatus) & 0x88) == 0x88)
		pr_err("%s: Transmitter encountered 16 collisions --"
			   " network cable problem?\n", dev->name);
	if (ioread16(ioaddr + EL3_STATUS) & IntLatch) {
		pr_err("%s: Interrupt posted but not delivered --"
			   " IRQ blocked by another device?\n", dev->name);
		/* Bad idea here.. but we might as well handle a few events. */
		{
			/*
			 * Block interrupts because vortex_interrupt does a bare spin_lock()
			 */
			unsigned long flags;
			local_irq_save(flags);
			if (vp->full_bus_master_tx)
				boomerang_interrupt(dev->irq, dev);
			else
				vortex_interrupt(dev->irq, dev);
			local_irq_restore(flags);
		}
	}

	if (vortex_debug > 0)
		dump_tx_ring(dev);

	issue_and_wait(dev, TxReset);

	dev->stats.tx_errors++;
	if (vp->full_bus_master_tx) {
		pr_debug("%s: Resetting the Tx ring pointer.\n", dev->name);
		if (vp->cur_tx - vp->dirty_tx > 0  &&  ioread32(ioaddr + DownListPtr) == 0)
			iowrite32(vp->tx_ring_dma + (vp->dirty_tx % TX_RING_SIZE) * sizeof(struct boom_tx_desc),
				 ioaddr + DownListPtr);
		if (vp->cur_tx - vp->dirty_tx < TX_RING_SIZE)
			netif_wake_queue (dev);
		if (vp->drv_flags & IS_BOOMERANG)
			iowrite8(PKT_BUF_SZ>>8, ioaddr + TxFreeThreshold);
		iowrite16(DownUnstall, ioaddr + EL3_CMD);
	} else {
		dev->stats.tx_dropped++;
		netif_wake_queue(dev);
	}

	/* Issue Tx Enable */
	iowrite16(TxEnable, ioaddr + EL3_CMD);
	dev->trans_start = jiffies; /* prevent tx timeout */
}

/*
 * Handle uncommon interrupt sources.  This is a separate routine to minimize
 * the cache impact.
 */
static void
vortex_error(struct net_device *dev, int status)
{
	struct vortex_private *vp = netdev_priv(dev);
	void __iomem *ioaddr = vp->ioaddr;
	int do_tx_reset = 0, reset_mask = 0;
	unsigned char tx_status = 0;

	if (vortex_debug > 2) {
		pr_err("%s: vortex_error(), status=0x%x\n", dev->name, status);
	}

	if (status & TxComplete) {			/* Really "TxError" for us. */
		tx_status = ioread8(ioaddr + TxStatus);
		/* Presumably a tx-timeout. We must merely re-enable. */
		if (vortex_debug > 2 ||
		    (tx_status != 0x88 && vortex_debug > 0)) {
			pr_err("%s: Transmit error, Tx status register %2.2x.\n",
				   dev->name, tx_status);
			if (tx_status == 0x82) {
				pr_err("Probably a duplex mismatch.  See "
						"Documentation/networking/vortex.txt\n");
			}
			dump_tx_ring(dev);
		}
		if (tx_status & 0x14)  dev->stats.tx_fifo_errors++;
		if (tx_status & 0x38)  dev->stats.tx_aborted_errors++;
		if (tx_status & 0x08)  vp->xstats.tx_max_collisions++;
		iowrite8(0, ioaddr + TxStatus);
		if (tx_status & 0x30) {			/* txJabber or txUnderrun */
			do_tx_reset = 1;
		} else if ((tx_status & 0x08) && (vp->drv_flags & MAX_COLLISION_RESET))  {	/* maxCollisions */
			do_tx_reset = 1;
			reset_mask = 0x0108;		/* Reset interface logic, but not download logic */
		} else {				/* Merely re-enable the transmitter. */
			iowrite16(TxEnable, ioaddr + EL3_CMD);
		}
	}

	if (status & RxEarly)				/* Rx early is unused. */
		iowrite16(AckIntr | RxEarly, ioaddr + EL3_CMD);

	if (status & StatsFull) {			/* Empty statistics. */
		static int DoneDidThat;
		if (vortex_debug > 4)
			pr_debug("%s: Updating stats.\n", dev->name);
		update_stats(ioaddr, dev);
		/* HACK: Disable statistics as an interrupt source. */
		/* This occurs when we have the wrong media type! */
		if (DoneDidThat == 0  &&
			ioread16(ioaddr + EL3_STATUS) & StatsFull) {
			pr_warn("%s: Updating statistics failed, disabling stats as an interrupt source\n",
				dev->name);
			iowrite16(SetIntrEnb |
				  (window_read16(vp, 5, 10) & ~StatsFull),
				  ioaddr + EL3_CMD);
			vp->intr_enable &= ~StatsFull;
			DoneDidThat++;
		}
	}
	if (status & IntReq) {		/* Restore all interrupt sources.  */
		iowrite16(vp->status_enable, ioaddr + EL3_CMD);
		iowrite16(vp->intr_enable, ioaddr + EL3_CMD);
	}
	if (status & HostError) {
		u16 fifo_diag;
		fifo_diag = window_read16(vp, 4, Wn4_FIFODiag);
		pr_err("%s: Host error, FIFO diagnostic register %4.4x.\n",
			   dev->name, fifo_diag);
		/* Adapter failure requires Tx/Rx reset and reinit. */
		if (vp->full_bus_master_tx) {
			int bus_status = ioread32(ioaddr + PktStatus);
			/* 0x80000000 PCI master abort. */
			/* 0x40000000 PCI target abort. */
			if (vortex_debug)
				pr_err("%s: PCI bus error, bus status %8.8x\n", dev->name, bus_status);

			/* In this case, blow the card away */
			/* Must not enter D3 or we can't legally issue the reset! */
			vortex_down(dev, 0);
			issue_and_wait(dev, TotalReset | 0xff);
			vortex_up(dev);		/* AKPM: bug.  vortex_up() assumes that the rx ring is full. It may not be. */
		} else if (fifo_diag & 0x0400)
			do_tx_reset = 1;
		if (fifo_diag & 0x3000) {
			/* Reset Rx fifo and upload logic */
			issue_and_wait(dev, RxReset|0x07);
			/* Set the Rx filter to the current state. */
			set_rx_mode(dev);
			/* enable 802.1q VLAN tagged frames */
			set_8021q_mode(dev, 1);
			iowrite16(RxEnable, ioaddr + EL3_CMD); /* Re-enable the receiver. */
			iowrite16(AckIntr | HostError, ioaddr + EL3_CMD);
		}
	}

	if (do_tx_reset) {
		issue_and_wait(dev, TxReset|reset_mask);
		iowrite16(TxEnable, ioaddr + EL3_CMD);
		if (!vp->full_bus_master_tx)
			netif_wake_queue(dev);
	}
}

static netdev_tx_t
vortex_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct vortex_private *vp = netdev_priv(dev);
	void __iomem *ioaddr = vp->ioaddr;

	/* Put out the doubleword header... */
	iowrite32(skb->len, ioaddr + TX_FIFO);
	if (vp->bus_master) {
		/* Set the bus-master controller to transfer the packet. */
		int len = (skb->len + 3) & ~3;
		vp->tx_skb_dma = pci_map_single(VORTEX_PCI(vp), skb->data, len,
						PCI_DMA_TODEVICE);
		spin_lock_irq(&vp->window_lock);
		window_set(vp, 7);
		iowrite32(vp->tx_skb_dma, ioaddr + Wn7_MasterAddr);
		iowrite16(len, ioaddr + Wn7_MasterLen);
		spin_unlock_irq(&vp->window_lock);
		vp->tx_skb = skb;
		skb_tx_timestamp(skb);
		iowrite16(StartDMADown, ioaddr + EL3_CMD);
		/* netif_wake_queue() will be called at the DMADone interrupt. */
	} else {
		/* ... and the packet rounded to a doubleword. */
		skb_tx_timestamp(skb);
		iowrite32_rep(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
		dev_consume_skb_any (skb);
		if (ioread16(ioaddr + TxFree) > 1536) {
			netif_start_queue (dev);	/* AKPM: redundant? */
		} else {
			/* Interrupt us when the FIFO has room for max-sized packet. */
			netif_stop_queue(dev);
			iowrite16(SetTxThreshold + (1536>>2), ioaddr + EL3_CMD);
		}
	}


	/* Clear the Tx status stack. */
	{
		int tx_status;
		int i = 32;

		while (--i > 0	&&	(tx_status = ioread8(ioaddr + TxStatus)) > 0) {
			if (tx_status & 0x3C) {		/* A Tx-disabling error occurred.  */
				if (vortex_debug > 2)
				  pr_debug("%s: Tx error, status %2.2x.\n",
						 dev->name, tx_status);
				if (tx_status & 0x04) dev->stats.tx_fifo_errors++;
				if (tx_status & 0x38) dev->stats.tx_aborted_errors++;
				if (tx_status & 0x30) {
					issue_and_wait(dev, TxReset);
				}
				iowrite16(TxEnable, ioaddr + EL3_CMD);
			}
			iowrite8(0x00, ioaddr + TxStatus); /* Pop the status stack. */
		}
	}
	return NETDEV_TX_OK;
}

static netdev_tx_t
boomerang_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct vortex_private *vp = netdev_priv(dev);
	void __iomem *ioaddr = vp->ioaddr;
	/* Calculate the next Tx descriptor entry. */
	int entry = vp->cur_tx % TX_RING_SIZE;
	struct boom_tx_desc *prev_entry = &vp->tx_ring[(vp->cur_tx-1) % TX_RING_SIZE];
	unsigned long flags;
	dma_addr_t dma_addr;

	if (vortex_debug > 6) {
		pr_debug("boomerang_start_xmit()\n");
		pr_debug("%s: Trying to send a packet, Tx index %d.\n",
			   dev->name, vp->cur_tx);
	}

	/*
	 * We can't allow a recursion from our interrupt handler back into the
	 * tx routine, as they take the same spin lock, and that causes
	 * deadlock.  Just return NETDEV_TX_BUSY and let the stack try again in
	 * a bit
	 */
	if (vp->handling_irq)
		return NETDEV_TX_BUSY;

	if (vp->cur_tx - vp->dirty_tx >= TX_RING_SIZE) {
		if (vortex_debug > 0)
			pr_warn("%s: BUG! Tx Ring full, refusing to send buffer\n",
				dev->name);
		netif_stop_queue(dev);
		return NETDEV_TX_BUSY;
	}

	vp->tx_skbuff[entry] = skb;

	vp->tx_ring[entry].next = 0;
#if DO_ZEROCOPY
	if (skb->ip_summed != CHECKSUM_PARTIAL)
			vp->tx_ring[entry].status = cpu_to_le32(skb->len | TxIntrUploaded);
	else
			vp->tx_ring[entry].status = cpu_to_le32(skb->len | TxIntrUploaded | AddTCPChksum | AddUDPChksum);

	if (!skb_shinfo(skb)->nr_frags) {
		dma_addr = pci_map_single(VORTEX_PCI(vp), skb->data, skb->len,
					  PCI_DMA_TODEVICE);
		if (dma_mapping_error(&VORTEX_PCI(vp)->dev, dma_addr))
			goto out_dma_err;

		vp->tx_ring[entry].frag[0].addr = cpu_to_le32(dma_addr);
		vp->tx_ring[entry].frag[0].length = cpu_to_le32(skb->len | LAST_FRAG);
	} else {
		int i;

		dma_addr = pci_map_single(VORTEX_PCI(vp), skb->data,
					  skb_headlen(skb), PCI_DMA_TODEVICE);
		if (dma_mapping_error(&VORTEX_PCI(vp)->dev, dma_addr))
			goto out_dma_err;

		vp->tx_ring[entry].frag[0].addr = cpu_to_le32(dma_addr);
		vp->tx_ring[entry].frag[0].length = cpu_to_le32(skb_headlen(skb));

		for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
			skb_frag_t *frag = &skb_shinfo(skb)->frags[i];

			dma_addr = skb_frag_dma_map(&VORTEX_PCI(vp)->dev, frag,
						    0,
						    frag->size,
						    DMA_TO_DEVICE);
			if (dma_mapping_error(&VORTEX_PCI(vp)->dev, dma_addr)) {
				for(i = i-1; i >= 0; i--)
					dma_unmap_page(&VORTEX_PCI(vp)->dev,
						       le32_to_cpu(vp->tx_ring[entry].frag[i+1].addr),
						       le32_to_cpu(vp->tx_ring[entry].frag[i+1].length),
						       DMA_TO_DEVICE);

				pci_unmap_single(VORTEX_PCI(vp),
						 le32_to_cpu(vp->tx_ring[entry].frag[0].addr),
						 le32_to_cpu(vp->tx_ring[entry].frag[0].length),
						 PCI_DMA_TODEVICE);

				goto out_dma_err;
			}

			vp->tx_ring[entry].frag[i+1].addr =
						cpu_to_le32(dma_addr);

			if (i == skb_shinfo(skb)->nr_frags-1)
					vp->tx_ring[entry].frag[i+1].length = cpu_to_le32(skb_frag_size(frag)|LAST_FRAG);
			else
					vp->tx_ring[entry].frag[i+1].length = cpu_to_le32(skb_frag_size(frag));
		}
	}
#else
	dma_addr = pci_map_single(VORTEX_PCI(vp), skb->data, skb->len, PCI_DMA_TODEVICE);
	if (dma_mapping_error(&VORTEX_PCI(vp)->dev, dma_addr))
		goto out_dma_err;
	vp->tx_ring[entry].addr = cpu_to_le32(dma_addr);
	vp->tx_ring[entry].length = cpu_to_le32(skb->len | LAST_FRAG);
	vp->tx_ring[entry].status = cpu_to_le32(skb->len | TxIntrUploaded);
#endif

	spin_lock_irqsave(&vp->lock, flags);
	/* Wait for the stall to complete. */
	issue_and_wait(dev, DownStall);
	prev_entry->next = cpu_to_le32(vp->tx_ring_dma + entry * sizeof(struct boom_tx_desc));
	if (ioread32(ioaddr + DownListPtr) == 0) {
		iowrite32(vp->tx_ring_dma + entry * sizeof(struct boom_tx_desc), ioaddr + DownListPtr);
		vp->queued_packet++;
	}

	vp->cur_tx++;
	if (vp->cur_tx - vp->dirty_tx > TX_RING_SIZE - 1) {
		netif_stop_queue (dev);
	} else {					/* Clear previous interrupt enable. */
#if defined(tx_interrupt_mitigation)
		/* Dubious. If in boomeang_interrupt "faster" cyclone ifdef
		 * were selected, this would corrupt DN_COMPLETE. No?
		 */
		prev_entry->status &= cpu_to_le32(~TxIntrUploaded);
#endif
	}
	skb_tx_timestamp(skb);
	iowrite16(DownUnstall, ioaddr + EL3_CMD);
	spin_unlock_irqrestore(&vp->lock, flags);
out:
	return NETDEV_TX_OK;
out_dma_err:
	dev_err(&VORTEX_PCI(vp)->dev, "Error mapping dma buffer\n");
	goto out;
}

/* The interrupt handler does all of the Rx thread work and cleans up
   after the Tx thread. */

/*
 * This is the ISR for the vortex series chips.
 * full_bus_master_tx == 0 && full_bus_master_rx == 0
 */

static irqreturn_t
vortex_interrupt(int irq, void *dev_id)
{
	struct net_device *dev = dev_id;
	struct vortex_private *vp = netdev_priv(dev);
	void __iomem *ioaddr;
	int status;
	int work_done = max_interrupt_work;
	int handled = 0;

	ioaddr = vp->ioaddr;
	spin_lock(&vp->lock);

	status = ioread16(ioaddr + EL3_STATUS);

	if (vortex_debug > 6)
		pr_debug("vortex_interrupt(). status=0x%4x\n", status);

	if ((status & IntLatch) == 0)
		goto handler_exit;		/* No interrupt: shared IRQs cause this */
	handled = 1;

	if (status & IntReq) {
		status |= vp->deferred;
		vp->deferred = 0;
	}

	if (status == 0xffff)		/* h/w no longer present (hotplug)? */
		goto handler_exit;

	if (vortex_debug > 4)
		pr_debug("%s: interrupt, status %4.4x, latency %d ticks.\n",
			   dev->name, status, ioread8(ioaddr + Timer));

	spin_lock(&vp->window_lock);
	window_set(vp, 7);

	do {
		if (vortex_debug > 5)
				pr_debug("%s: In interrupt loop, status %4.4x.\n",
					   dev->name, status);
		if (status & RxComplete)
			vortex_rx(dev);

		if (status & TxAvailable) {
			if (vortex_debug > 5)
				pr_debug("	TX room bit was handled.\n");
			/* There's room in the FIFO for a full-sized packet. */
			iowrite16(AckIntr | TxAvailable, ioaddr + EL3_CMD);
			netif_wake_queue (dev);
		}

		if (status & DMADone) {
			if (ioread16(ioaddr + Wn7_MasterStatus) & 0x1000) {
				iowrite16(0x1000, ioaddr + Wn7_MasterStatus); /* Ack the event. */
				pci_unmap_single(VORTEX_PCI(vp), vp->tx_skb_dma, (vp->tx_skb->len + 3) & ~3, PCI_DMA_TODEVICE);
				dev_kfree_skb_irq(vp->tx_skb); /* Release the transferred buffer */
				if (ioread16(ioaddr + TxFree) > 1536) {
					/*
					 * AKPM: FIXME: I don't think we need this.  If the queue was stopped due to
					 * insufficient FIFO room, the TxAvailable test will succeed and call
					 * netif_wake_queue()
					 */
					netif_wake_queue(dev);
				} else { /* Interrupt when FIFO has room for max-sized packet. */
					iowrite16(SetTxThreshold + (1536>>2), ioaddr + EL3_CMD);
					netif_stop_queue(dev);
				}
			}
		}
		/* Check for all uncommon interrupts at once. */
		if (status & (HostError | RxEarly | StatsFull | TxComplete | IntReq)) {
			if (status == 0xffff)
				break;
			if (status & RxEarly)
				vortex_rx(dev);
			spin_unlock(&vp->window_lock);
			vortex_error(dev, status);
			spin_lock(&vp->window_lock);
			window_set(vp, 7);
		}

		if (--work_done < 0) {
			pr_warn("%s: Too much work in interrupt, status %4.4x\n",
				dev->name, status);
			/* Disable all pending interrupts. */
			do {
				vp->deferred |= status;
				iowrite16(SetStatusEnb | (~vp->deferred & vp->status_enable),
					 ioaddr + EL3_CMD);
				iowrite16(AckIntr | (vp->deferred & 0x7ff), ioaddr + EL3_CMD);
			} while ((status = ioread16(ioaddr + EL3_CMD)) & IntLatch);
			/* The timer will reenable interrupts. */
			mod_timer(&vp->timer, jiffies + 1*HZ);
			break;
		}
		/* Acknowledge the IRQ. */
		iowrite16(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
	} while ((status = ioread16(ioaddr + EL3_STATUS)) & (IntLatch | RxComplete));

	spin_unlock(&vp->window_lock);

	if (vortex_debug > 4)
		pr_debug("%s: exiting interrupt, status %4.4x.\n",
			   dev->name, status);
handler_exit:
	spin_unlock(&vp->lock);
	return IRQ_RETVAL(handled);
}

/*
 * This is the ISR for the boomerang series chips.
 * full_bus_master_tx == 1 && full_bus_master_rx == 1
 */

static irqreturn_t
boomerang_interrupt(int irq, void *dev_id)
{
	struct net_device *dev = dev_id;
	struct vortex_private *vp = netdev_priv(dev);
	void __iomem *ioaddr;
	int status;
	int work_done = max_interrupt_work;
	int handled = 0;

	ioaddr = vp->ioaddr;


	/*
	 * It seems dopey to put the spinlock this early, but we could race against vortex_tx_timeout
	 * and boomerang_start_xmit
	 */
	spin_lock(&vp->lock);
	vp->handling_irq = 1;

	status = ioread16(ioaddr + EL3_STATUS);

	if (vortex_debug > 6)
		pr_debug("boomerang_interrupt. status=0x%4x\n", status);

	if ((status & IntLatch) == 0)
		goto handler_exit;		/* No interrupt: shared IRQs can cause this */
	handled = 1;

	if (status == 0xffff) {		/* h/w no longer present (hotplug)? */
		if (vortex_debug > 1)
			pr_debug("boomerang_interrupt(1): status = 0xffff\n");
		goto handler_exit;
	}

	if (status & IntReq) {
		status |= vp->deferred;
		vp->deferred = 0;
	}

	if (vortex_debug > 4)
		pr_debug("%s: interrupt, status %4.4x, latency %d ticks.\n",
			   dev->name, status, ioread8(ioaddr + Timer));
	do {
		if (vortex_debug > 5)
				pr_debug("%s: In interrupt loop, status %4.4x.\n",
					   dev->name, status);
		if (status & UpComplete) {
			iowrite16(AckIntr | UpComplete, ioaddr + EL3_CMD);
			if (vortex_debug > 5)
				pr_debug("boomerang_interrupt->boomerang_rx\n");
			boomerang_rx(dev);
		}

		if (status & DownComplete) {
			unsigned int dirty_tx = vp->dirty_tx;

			iowrite16(AckIntr | DownComplete, ioaddr + EL3_CMD);
			while (vp->cur_tx - dirty_tx > 0) {
				int entry = dirty_tx % TX_RING_SIZE;
#if 1	/* AKPM: the latter is faster, but cyclone-only */
				if (ioread32(ioaddr + DownListPtr) ==
					vp->tx_ring_dma + entry * sizeof(struct boom_tx_desc))
					break;			/* It still hasn't been processed. */
#else
				if ((vp->tx_ring[entry].status & DN_COMPLETE) == 0)
					break;			/* It still hasn't been processed. */
#endif

				if (vp->tx_skbuff[entry]) {
					struct sk_buff *skb = vp->tx_skbuff[entry];
#if DO_ZEROCOPY
					int i;
					for (i=0; i<=skb_shinfo(skb)->nr_frags; i++)
							pci_unmap_single(VORTEX_PCI(vp),
											 le32_to_cpu(vp->tx_ring[entry].frag[i].addr),
											 le32_to_cpu(vp->tx_ring[entry].frag[i].length)&0xFFF,
											 PCI_DMA_TODEVICE);
#else
					pci_unmap_single(VORTEX_PCI(vp),
						le32_to_cpu(vp->tx_ring[entry].addr), skb->len, PCI_DMA_TODEVICE);
#endif
					dev_kfree_skb_irq(skb);
					vp->tx_skbuff[entry] = NULL;
				} else {
					pr_debug("boomerang_interrupt: no skb!\n");
				}
				/* dev->stats.tx_packets++;  Counted below. */
				dirty_tx++;
			}
			vp->dirty_tx = dirty_tx;
			if (vp->cur_tx - dirty_tx <= TX_RING_SIZE - 1) {
				if (vortex_debug > 6)
					pr_debug("boomerang_interrupt: wake queue\n");
				netif_wake_queue (dev);
			}
		}

		/* Check for all uncommon interrupts at once. */
		if (status & (HostError | RxEarly | StatsFull | TxComplete | IntReq))
			vortex_error(dev, status);

		if (--work_done < 0) {
			pr_warn("%s: Too much work in interrupt, status %4.4x\n",
				dev->name, status);
			/* Disable all pending interrupts. */
			do {
				vp->deferred |= status;
				iowrite16(SetStatusEnb | (~vp->deferred & vp->status_enable),
					 ioaddr + EL3_CMD);
				iowrite16(AckIntr | (vp->deferred & 0x7ff), ioaddr + EL3_CMD);
			} while ((status = ioread16(ioaddr + EL3_CMD)) & IntLatch);
			/* The timer will reenable interrupts. */
			mod_timer(&vp->timer, jiffies + 1*HZ);
			break;
		}
		/* Acknowledge the IRQ. */
		iowrite16(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
		if (vp->cb_fn_base)			/* The PCMCIA people are idiots.  */
			iowrite32(0x8000, vp->cb_fn_base + 4);

	} while ((status = ioread16(ioaddr + EL3_STATUS)) & IntLatch);

	if (vortex_debug > 4)
		pr_debug("%s: exiting interrupt, status %4.4x.\n",
			   dev->name, status);
handler_exit:
	vp->handling_irq = 0;
	spin_unlock(&vp->lock);
	return IRQ_RETVAL(handled);
}

static int vortex_rx(struct net_device *dev)
{
	struct vortex_private *vp = netdev_priv(dev);
	void __iomem *ioaddr = vp->ioaddr;
	int i;
	short rx_status;

	if (vortex_debug > 5)
		pr_debug("vortex_rx(): status %4.4x, rx_status %4.4x.\n",
			   ioread16(ioaddr+EL3_STATUS), ioread16(ioaddr+RxStatus));
	while ((rx_status = ioread16(ioaddr + RxStatus)) > 0) {
		if (rx_status & 0x4000) { /* Error, update stats. */
			unsigned char rx_error = ioread8(ioaddr + RxErrors);
			if (vortex_debug > 2)
				pr_debug(" Rx error: status %2.2x.\n", rx_error);
			dev->stats.rx_errors++;
			if (rx_error & 0x01)  dev->stats.rx_over_errors++;
			if (rx_error & 0x02)  dev->stats.rx_length_errors++;
			if (rx_error & 0x04)  dev->stats.rx_frame_errors++;
			if (rx_error & 0x08)  dev->stats.rx_crc_errors++;
			if (rx_error & 0x10)  dev->stats.rx_length_errors++;
		} else {
			/* The packet length: up to 4.5K!. */
			int pkt_len = rx_status & 0x1fff;
			struct sk_buff *skb;

			skb = netdev_alloc_skb(dev, pkt_len + 5);
			if (vortex_debug > 4)
				pr_debug("Receiving packet size %d status %4.4x.\n",
					   pkt_len, rx_status);
			if (skb != NULL) {
				skb_reserve(skb, 2);	/* Align IP on 16 byte boundaries */
				/* 'skb_put()' points to the start of sk_buff data area. */
				if (vp->bus_master &&
					! (ioread16(ioaddr + Wn7_MasterStatus) & 0x8000)) {
					dma_addr_t dma = pci_map_single(VORTEX_PCI(vp), skb_put(skb, pkt_len),
									   pkt_len, PCI_DMA_FROMDEVICE);
					iowrite32(dma, ioaddr + Wn7_MasterAddr);
					iowrite16((skb->len + 3) & ~3, ioaddr + Wn7_MasterLen);
					iowrite16(StartDMAUp, ioaddr + EL3_CMD);
					while (ioread16(ioaddr + Wn7_MasterStatus) & 0x8000)
						;
					pci_unmap_single(VORTEX_PCI(vp), dma, pkt_len, PCI_DMA_FROMDEVICE);
				} else {
					ioread32_rep(ioaddr + RX_FIFO,
					             skb_put(skb, pkt_len),
						     (pkt_len + 3) >> 2);
				}
				iowrite16(RxDiscard, ioaddr + EL3_CMD); /* Pop top Rx packet. */
				skb->protocol = eth_type_trans(skb, dev);
				netif_rx(skb);
				dev->stats.rx_packets++;
				/* Wait a limited time to go to next packet. */
				for (i = 200; i >= 0; i--)
					if ( ! (ioread16(ioaddr + EL3_STATUS) & CmdInProgress))
						break;
				continue;
			} else if (vortex_debug > 0)
				pr_notice("%s: No memory to allocate a sk_buff of size %d.\n",
					dev->name, pkt_len);
			dev->stats.rx_dropped++;
		}
		issue_and_wait(dev, RxDiscard);
	}

	return 0;
}

static int
boomerang_rx(struct net_device *dev)
{
	struct vortex_private *vp = netdev_priv(dev);
	int entry = vp->cur_rx % RX_RING_SIZE;
	void __iomem *ioaddr = vp->ioaddr;
	int rx_status;
	int rx_work_limit = vp->dirty_rx + RX_RING_SIZE - vp->cur_rx;

	if (vortex_debug > 5)
		pr_debug("boomerang_rx(): status %4.4x\n", ioread16(ioaddr+EL3_STATUS));

	while ((rx_status = le32_to_cpu(vp->rx_ring[entry].status)) & RxDComplete){
		if (--rx_work_limit < 0)
			break;
		if (rx_status & RxDError) { /* Error, update stats. */
			unsigned char rx_error = rx_status >> 16;
			if (vortex_debug > 2)
				pr_debug(" Rx error: status %2.2x.\n", rx_error);
			dev->stats.rx_errors++;
			if (rx_error & 0x01)  dev->stats.rx_over_errors++;
			if (rx_error & 0x02)  dev->stats.rx_length_errors++;
			if (rx_error & 0x04)  dev->stats.rx_frame_errors++;
			if (rx_error & 0x08)  dev->stats.rx_crc_errors++;
			if (rx_error & 0x10)  dev->stats.rx_length_errors++;
		} else {
			/* The packet length: up to 4.5K!. */
			int pkt_len = rx_status & 0x1fff;
			struct sk_buff *skb;
			dma_addr_t dma = le32_to_cpu(vp->rx_ring[entry].addr);

			if (vortex_debug > 4)
				pr_debug("Receiving packet size %d status %4.4x.\n",
					   pkt_len, rx_status);

			/* Check if the packet is long enough to just accept without
			   copying to a properly sized skbuff. */
			if (pkt_len < rx_copybreak &&
			    (skb = netdev_alloc_skb(dev, pkt_len + 2)) != NULL) {
				skb_reserve(skb, 2);	/* Align IP on 16 byte boundaries */
				pci_dma_sync_single_for_cpu(VORTEX_PCI(vp), dma, PKT_BUF_SZ, PCI_DMA_FROMDEVICE);
				/* 'skb_put()' points to the start of sk_buff data area. */
				memcpy(skb_put(skb, pkt_len),
					   vp->rx_skbuff[entry]->data,
					   pkt_len);
				pci_dma_sync_single_for_device(VORTEX_PCI(vp), dma, PKT_BUF_SZ, PCI_DMA_FROMDEVICE);
				vp->rx_copy++;
			} else {
				/* Pass up the skbuff already on the Rx ring. */
				skb = vp->rx_skbuff[entry];
				vp->rx_skbuff[entry] = NULL;
				skb_put(skb, pkt_len);
				pci_unmap_single(VORTEX_PCI(vp), dma, PKT_BUF_SZ, PCI_DMA_FROMDEVICE);
				vp->rx_nocopy++;
			}
			skb->protocol = eth_type_trans(skb, dev);
			{					/* Use hardware checksum info. */
				int csum_bits = rx_status & 0xee000000;
				if (csum_bits &&
					(csum_bits == (IPChksumValid | TCPChksumValid) ||
					 csum_bits == (IPChksumValid | UDPChksumValid))) {
					skb->ip_summed = CHECKSUM_UNNECESSARY;
					vp->rx_csumhits++;
				}
			}
			netif_rx(skb);
			dev->stats.rx_packets++;
		}
		entry = (++vp->cur_rx) % RX_RING_SIZE;
	}
	/* Refill the Rx ring buffers. */
	for (; vp->cur_rx - vp->dirty_rx > 0; vp->dirty_rx++) {
		struct sk_buff *skb;
		entry = vp->dirty_rx % RX_RING_SIZE;
		if (vp->rx_skbuff[entry] == NULL) {
			skb = netdev_alloc_skb_ip_align(dev, PKT_BUF_SZ);
			if (skb == NULL) {
				static unsigned long last_jif;
				if (time_after(jiffies, last_jif + 10 * HZ)) {
					pr_warn("%s: memory shortage\n",
						dev->name);
					last_jif = jiffies;
				}
				if ((vp->cur_rx - vp->dirty_rx) == RX_RING_SIZE)
					mod_timer(&vp->rx_oom_timer, RUN_AT(HZ * 1));
				break;			/* Bad news!  */
			}

			vp->rx_ring[entry].addr = cpu_to_le32(pci_map_single(VORTEX_PCI(vp), skb->data, PKT_BUF_SZ, PCI_DMA_FROMDEVICE));
			vp->rx_skbuff[entry] = skb;
		}
		vp->rx_ring[entry].status = 0;	/* Clear complete bit. */
		iowrite16(UpUnstall, ioaddr + EL3_CMD);
	}
	return 0;
}

/*
 * If we've hit a total OOM refilling the Rx ring we poll once a second
 * for some memory.  Otherwise there is no way to restart the rx process.
 */
static void
rx_oom_timer(unsigned long arg)
{
	struct net_device *dev = (struct net_device *)arg;
	struct vortex_private *vp = netdev_priv(dev);

	spin_lock_irq(&vp->lock);
	if ((vp->cur_rx - vp->dirty_rx) == RX_RING_SIZE)	/* This test is redundant, but makes me feel good */
		boomerang_rx(dev);
	if (vortex_debug > 1) {
		pr_debug("%s: rx_oom_timer %s\n", dev->name,
			((vp->cur_rx - vp->dirty_rx) != RX_RING_SIZE) ? "succeeded" : "retrying");
	}
	spin_unlock_irq(&vp->lock);
}

static void
vortex_down(struct net_device *dev, int final_down)
{
	struct vortex_private *vp = netdev_priv(dev);
	void __iomem *ioaddr = vp->ioaddr;

	netif_stop_queue (dev);

	del_timer_sync(&vp->rx_oom_timer);
	del_timer_sync(&vp->timer);

	/* Turn off statistics ASAP.  We update dev->stats below. */
	iowrite16(StatsDisable, ioaddr + EL3_CMD);

	/* Disable the receiver and transmitter. */
	iowrite16(RxDisable, ioaddr + EL3_CMD);
	iowrite16(TxDisable, ioaddr + EL3_CMD);

	/* Disable receiving 802.1q tagged frames */
	set_8021q_mode(dev, 0);

	if (dev->if_port == XCVR_10base2)
		/* Turn off thinnet power.  Green! */
		iowrite16(StopCoax, ioaddr + EL3_CMD);

	iowrite16(SetIntrEnb | 0x0000, ioaddr + EL3_CMD);

	update_stats(ioaddr, dev);
	if (vp->full_bus_master_rx)
		iowrite32(0, ioaddr + UpListPtr);
	if (vp->full_bus_master_tx)
		iowrite32(0, ioaddr + DownListPtr);

	if (final_down && VORTEX_PCI(vp)) {
		vp->pm_state_valid = 1;
		pci_save_state(VORTEX_PCI(vp));
		acpi_set_WOL(dev);
	}
}

static int
vortex_close(struct net_device *dev)
{
	struct vortex_private *vp = netdev_priv(dev);
	void __iomem *ioaddr = vp->ioaddr;
	int i;

	if (netif_device_present(dev))
		vortex_down(dev, 1);

	if (vortex_debug > 1) {
		pr_debug("%s: vortex_close() status %4.4x, Tx status %2.2x.\n",
			   dev->name, ioread16(ioaddr + EL3_STATUS), ioread8(ioaddr + TxStatus));
		pr_debug("%s: vortex close stats: rx_nocopy %d rx_copy %d"
			   " tx_queued %d Rx pre-checksummed %d.\n",
			   dev->name, vp->rx_nocopy, vp->rx_copy, vp->queued_packet, vp->rx_csumhits);
	}

#if DO_ZEROCOPY
	if (vp->rx_csumhits &&
	    (vp->drv_flags & HAS_HWCKSM) == 0 &&
	    (vp->card_idx >= MAX_UNITS || hw_checksums[vp->card_idx] == -1)) {
		pr_warn("%s supports hardware checksums, and we're not using them!\n",
			dev->name);
	}
#endif

	free_irq(dev->irq, dev);

	if (vp->full_bus_master_rx) { /* Free Boomerang bus master Rx buffers. */
		for (i = 0; i < RX_RING_SIZE; i++)
			if (vp->rx_skbuff[i]) {
				pci_unmap_single(	VORTEX_PCI(vp), le32_to_cpu(vp->rx_ring[i].addr),
									PKT_BUF_SZ, PCI_DMA_FROMDEVICE);
				dev_kfree_skb(vp->rx_skbuff[i]);
				vp->rx_skbuff[i] = NULL;
			}
	}
	if (vp->full_bus_master_tx) { /* Free Boomerang bus master Tx buffers. */
		for (i = 0; i < TX_RING_SIZE; i++) {
			if (vp->tx_skbuff[i]) {
				struct sk_buff *skb = vp->tx_skbuff[i];
#if DO_ZEROCOPY
				int k;

				for (k=0; k<=skb_shinfo(skb)->nr_frags; k++)
						pci_unmap_single(VORTEX_PCI(vp),
										 le32_to_cpu(vp->tx_ring[i].frag[k].addr),
										 le32_to_cpu(vp->tx_ring[i].frag[k].length)&0xFFF,
										 PCI_DMA_TODEVICE);
#else
				pci_unmap_single(VORTEX_PCI(vp), le32_to_cpu(vp->tx_ring[i].addr), skb->len, PCI_DMA_TODEVICE);
#endif
				dev_kfree_skb(skb);
				vp->tx_skbuff[i] = NULL;
			}
		}
	}

	return 0;
}

static void
dump_tx_ring(struct net_device *dev)
{
	if (vortex_debug > 0) {
	struct vortex_private *vp = netdev_priv(dev);
		void __iomem *ioaddr = vp->ioaddr;

		if (vp->full_bus_master_tx) {
			int i;
			int stalled = ioread32(ioaddr + PktStatus) & 0x04;	/* Possible racy. But it's only debug stuff */

			pr_err("  Flags; bus-master %d, dirty %d(%d) current %d(%d)\n",
					vp->full_bus_master_tx,
					vp->dirty_tx, vp->dirty_tx % TX_RING_SIZE,
					vp->cur_tx, vp->cur_tx % TX_RING_SIZE);
			pr_err("  Transmit list %8.8x vs. %p.\n",
				   ioread32(ioaddr + DownListPtr),
				   &vp->tx_ring[vp->dirty_tx % TX_RING_SIZE]);
			issue_and_wait(dev, DownStall);
			for (i = 0; i < TX_RING_SIZE; i++) {
				unsigned int length;

#if DO_ZEROCOPY
				length = le32_to_cpu(vp->tx_ring[i].frag[0].length);
#else
				length = le32_to_cpu(vp->tx_ring[i].length);
#endif
				pr_err("  %d: @%p  length %8.8x status %8.8x\n",
					   i, &vp->tx_ring[i], length,
					   le32_to_cpu(vp->tx_ring[i].status));
			}
			if (!stalled)
				iowrite16(DownUnstall, ioaddr + EL3_CMD);
		}
	}
}

static struct net_device_stats *vortex_get_stats(struct net_device *dev)
{
	struct vortex_private *vp = netdev_priv(dev);
	void __iomem *ioaddr = vp->ioaddr;
	unsigned long flags;

	if (netif_device_present(dev)) {	/* AKPM: Used to be netif_running */
		spin_lock_irqsave (&vp->lock, flags);
		update_stats(ioaddr, dev);
		spin_unlock_irqrestore (&vp->lock, flags);
	}
	return &dev->stats;
}

/*  Update statistics.
	Unlike with the EL3 we need not worry about interrupts changing
	the window setting from underneath us, but we must still guard
	against a race condition with a StatsUpdate interrupt updating the
	table.  This is done by checking that the ASM (!) code generated uses
	atomic updates with '+='.
	*/
static void update_stats(void __iomem *ioaddr, struct net_device *dev)
{
	struct vortex_private *vp = netdev_priv(dev);

	/* Unlike the 3c5x9 we need not turn off stats updates while reading. */
	/* Switch to the stats window, and read everything. */
	dev->stats.tx_carrier_errors		+= window_read8(vp, 6, 0);
	dev->stats.tx_heartbeat_errors		+= window_read8(vp, 6, 1);
	dev->stats.tx_window_errors		+= window_read8(vp, 6, 4);
	dev->stats.rx_fifo_errors		+= window_read8(vp, 6, 5);
	dev->stats.tx_packets			+= window_read8(vp, 6, 6);
	dev->stats.tx_packets			+= (window_read8(vp, 6, 9) &
						    0x30) << 4;
	/* Rx packets	*/			window_read8(vp, 6, 7);   /* Must read to clear */
	/* Don't bother with register 9, an extension of registers 6&7.
	   If we do use the 6&7 values the atomic update assumption above
	   is invalid. */
	dev->stats.rx_bytes 			+= window_read16(vp, 6, 10);
	dev->stats.tx_bytes 			+= window_read16(vp, 6, 12);
	/* Extra stats for get_ethtool_stats() */
	vp->xstats.tx_multiple_collisions	+= window_read8(vp, 6, 2);
	vp->xstats.tx_single_collisions         += window_read8(vp, 6, 3);
	vp->xstats.tx_deferred			+= window_read8(vp, 6, 8);
	vp->xstats.rx_bad_ssd			+= window_read8(vp, 4, 12);

	dev->stats.collisions = vp->xstats.tx_multiple_collisions
		+ vp->xstats.tx_single_collisions
		+ vp->xstats.tx_max_collisions;

	{
		u8 up = window_read8(vp, 4, 13);
		dev->stats.rx_bytes += (up & 0x0f) << 16;
		dev->stats.tx_bytes += (up & 0xf0) << 12;
	}
}

static int vortex_nway_reset(struct net_device *dev)
{
	struct vortex_private *vp = netdev_priv(dev);

	return mii_nway_restart(&vp->mii);
}

static int vortex_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	struct vortex_private *vp = netdev_priv(dev);

	return mii_ethtool_gset(&vp->mii, cmd);
}

static int vortex_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	struct vortex_private *vp = netdev_priv(dev);

	return mii_ethtool_sset(&vp->mii, cmd);
}

static u32 vortex_get_msglevel(struct net_device *dev)
{
	return vortex_debug;
}

static void vortex_set_msglevel(struct net_device *dev, u32 dbg)
{
	vortex_debug = dbg;
}

static int vortex_get_sset_count(struct net_device *dev, int sset)
{
	switch (sset) {
	case ETH_SS_STATS:
		return VORTEX_NUM_STATS;
	default:
		return -EOPNOTSUPP;
	}
}

static void vortex_get_ethtool_stats(struct net_device *dev,
	struct ethtool_stats *stats, u64 *data)
{
	struct vortex_private *vp = netdev_priv(dev);
	void __iomem *ioaddr = vp->ioaddr;
	unsigned long flags;

	spin_lock_irqsave(&vp->lock, flags);
	update_stats(ioaddr, dev);
	spin_unlock_irqrestore(&vp->lock, flags);

	data[0] = vp->xstats.tx_deferred;
	data[1] = vp->xstats.tx_max_collisions;
	data[2] = vp->xstats.tx_multiple_collisions;
	data[3] = vp->xstats.tx_single_collisions;
	data[4] = vp->xstats.rx_bad_ssd;
}


static void vortex_get_strings(struct net_device *dev, u32 stringset, u8 *data)
{
	switch (stringset) {
	case ETH_SS_STATS:
		memcpy(data, &ethtool_stats_keys, sizeof(ethtool_stats_keys));
		break;
	default:
		WARN_ON(1);
		break;
	}
}

static void vortex_get_drvinfo(struct net_device *dev,
					struct ethtool_drvinfo *info)
{
	struct vortex_private *vp = netdev_priv(dev);

	strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
	if (VORTEX_PCI(vp)) {
		strlcpy(info->bus_info, pci_name(VORTEX_PCI(vp)),
			sizeof(info->bus_info));
	} else {
		if (VORTEX_EISA(vp))
			strlcpy(info->bus_info, dev_name(vp->gendev),
				sizeof(info->bus_info));
		else
			snprintf(info->bus_info, sizeof(info->bus_info),
				"EISA 0x%lx %d", dev->base_addr, dev->irq);
	}
}

static void vortex_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
{
	struct vortex_private *vp = netdev_priv(dev);

	if (!VORTEX_PCI(vp))
		return;

	wol->supported = WAKE_MAGIC;

	wol->wolopts = 0;
	if (vp->enable_wol)
		wol->wolopts |= WAKE_MAGIC;
}

static int vortex_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
{
	struct vortex_private *vp = netdev_priv(dev);

	if (!VORTEX_PCI(vp))
		return -EOPNOTSUPP;

	if (wol->wolopts & ~WAKE_MAGIC)
		return -EINVAL;

	if (wol->wolopts & WAKE_MAGIC)
		vp->enable_wol = 1;
	else
		vp->enable_wol = 0;
	acpi_set_WOL(dev);

	return 0;
}

static const struct ethtool_ops vortex_ethtool_ops = {
	.get_drvinfo		= vortex_get_drvinfo,
	.get_strings            = vortex_get_strings,
	.get_msglevel           = vortex_get_msglevel,
	.set_msglevel           = vortex_set_msglevel,
	.get_ethtool_stats      = vortex_get_ethtool_stats,
	.get_sset_count		= vortex_get_sset_count,
	.get_settings           = vortex_get_settings,
	.set_settings           = vortex_set_settings,
	.get_link               = ethtool_op_get_link,
	.nway_reset             = vortex_nway_reset,
	.get_wol                = vortex_get_wol,
	.set_wol                = vortex_set_wol,
	.get_ts_info		= ethtool_op_get_ts_info,
};

#ifdef CONFIG_PCI
/*
 *	Must power the device up to do MDIO operations
 */
static int vortex_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
	int err;
	struct vortex_private *vp = netdev_priv(dev);
	pci_power_t state = 0;

	if(VORTEX_PCI(vp))
		state = VORTEX_PCI(vp)->current_state;

	/* The kernel core really should have pci_get_power_state() */

	if(state != 0)
		pci_set_power_state(VORTEX_PCI(vp), PCI_D0);
	err = generic_mii_ioctl(&vp->mii, if_mii(rq), cmd, NULL);
	if(state != 0)
		pci_set_power_state(VORTEX_PCI(vp), state);

	return err;
}
#endif


/* Pre-Cyclone chips have no documented multicast filter, so the only
   multicast setting is to receive all multicast frames.  At least
   the chip has a very clean way to set the mode, unlike many others. */
static void set_rx_mode(struct net_device *dev)
{
	struct vortex_private *vp = netdev_priv(dev);
	void __iomem *ioaddr = vp->ioaddr;
	int new_mode;

	if (dev->flags & IFF_PROMISC) {
		if (vortex_debug > 3)
			pr_notice("%s: Setting promiscuous mode.\n", dev->name);
		new_mode = SetRxFilter|RxStation|RxMulticast|RxBroadcast|RxProm;
	} else	if (!netdev_mc_empty(dev) || dev->flags & IFF_ALLMULTI) {
		new_mode = SetRxFilter|RxStation|RxMulticast|RxBroadcast;
	} else
		new_mode = SetRxFilter | RxStation | RxBroadcast;

	iowrite16(new_mode, ioaddr + EL3_CMD);
}

#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
/* Setup the card so that it can receive frames with an 802.1q VLAN tag.
   Note that this must be done after each RxReset due to some backwards
   compatibility logic in the Cyclone and Tornado ASICs */

/* The Ethernet Type used for 802.1q tagged frames */
#define VLAN_ETHER_TYPE 0x8100

static void set_8021q_mode(struct net_device *dev, int enable)
{
	struct vortex_private *vp = netdev_priv(dev);
	int mac_ctrl;

	if ((vp->drv_flags&IS_CYCLONE) || (vp->drv_flags&IS_TORNADO)) {
		/* cyclone and tornado chipsets can recognize 802.1q
		 * tagged frames and treat them correctly */

		int max_pkt_size = dev->mtu+14;	/* MTU+Ethernet header */
		if (enable)
			max_pkt_size += 4;	/* 802.1Q VLAN tag */

		window_write16(vp, max_pkt_size, 3, Wn3_MaxPktSize);

		/* set VlanEtherType to let the hardware checksumming
		   treat tagged frames correctly */
		window_write16(vp, VLAN_ETHER_TYPE, 7, Wn7_VlanEtherType);
	} else {
		/* on older cards we have to enable large frames */

		vp->large_frames = dev->mtu > 1500 || enable;

		mac_ctrl = window_read16(vp, 3, Wn3_MAC_Ctrl);
		if (vp->large_frames)
			mac_ctrl |= 0x40;
		else
			mac_ctrl &= ~0x40;
		window_write16(vp, mac_ctrl, 3, Wn3_MAC_Ctrl);
	}
}
#else

static void set_8021q_mode(struct net_device *dev, int enable)
{
}


#endif

/* MII transceiver control section.
   Read and write the MII registers using software-generated serial
   MDIO protocol.  See the MII specifications or DP83840A data sheet
   for details. */

/* The maximum data clock rate is 2.5 Mhz.  The minimum timing is usually
   met by back-to-back PCI I/O cycles, but we insert a delay to avoid
   "overclocking" issues. */
static void mdio_delay(struct vortex_private *vp)
{
	window_read32(vp, 4, Wn4_PhysicalMgmt);
}

#define MDIO_SHIFT_CLK	0x01
#define MDIO_DIR_WRITE	0x04
#define MDIO_DATA_WRITE0 (0x00 | MDIO_DIR_WRITE)
#define MDIO_DATA_WRITE1 (0x02 | MDIO_DIR_WRITE)
#define MDIO_DATA_READ	0x02
#define MDIO_ENB_IN		0x00

/* Generate the preamble required for initial synchronization and
   a few older transceivers. */
static void mdio_sync(struct vortex_private *vp, int bits)
{
	/* Establish sync by sending at least 32 logic ones. */
	while (-- bits >= 0) {
		window_write16(vp, MDIO_DATA_WRITE1, 4, Wn4_PhysicalMgmt);
		mdio_delay(vp);
		window_write16(vp, MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK,
			       4, Wn4_PhysicalMgmt);
		mdio_delay(vp);
	}
}

static int mdio_read(struct net_device *dev, int phy_id, int location)
{
	int i;
	struct vortex_private *vp = netdev_priv(dev);
	int read_cmd = (0xf6 << 10) | (phy_id << 5) | location;
	unsigned int retval = 0;

	spin_lock_bh(&vp->mii_lock);

	if (mii_preamble_required)
		mdio_sync(vp, 32);

	/* Shift the read command bits out. */
	for (i = 14; i >= 0; i--) {
		int dataval = (read_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
		window_write16(vp, dataval, 4, Wn4_PhysicalMgmt);
		mdio_delay(vp);
		window_write16(vp, dataval | MDIO_SHIFT_CLK,
			       4, Wn4_PhysicalMgmt);
		mdio_delay(vp);
	}
	/* Read the two transition, 16 data, and wire-idle bits. */
	for (i = 19; i > 0; i--) {
		window_write16(vp, MDIO_ENB_IN, 4, Wn4_PhysicalMgmt);
		mdio_delay(vp);
		retval = (retval << 1) |
			((window_read16(vp, 4, Wn4_PhysicalMgmt) &
			  MDIO_DATA_READ) ? 1 : 0);
		window_write16(vp, MDIO_ENB_IN | MDIO_SHIFT_CLK,
			       4, Wn4_PhysicalMgmt);
		mdio_delay(vp);
	}

	spin_unlock_bh(&vp->mii_lock);

	return retval & 0x20000 ? 0xffff : retval>>1 & 0xffff;
}

static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
{
	struct vortex_private *vp = netdev_priv(dev);
	int write_cmd = 0x50020000 | (phy_id << 23) | (location << 18) | value;
	int i;

	spin_lock_bh(&vp->mii_lock);

	if (mii_preamble_required)
		mdio_sync(vp, 32);

	/* Shift the command bits out. */
	for (i = 31; i >= 0; i--) {
		int dataval = (write_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
		window_write16(vp, dataval, 4, Wn4_PhysicalMgmt);
		mdio_delay(vp);
		window_write16(vp, dataval | MDIO_SHIFT_CLK,
			       4, Wn4_PhysicalMgmt);
		mdio_delay(vp);
	}
	/* Leave the interface idle. */
	for (i = 1; i >= 0; i--) {
		window_write16(vp, MDIO_ENB_IN, 4, Wn4_PhysicalMgmt);
		mdio_delay(vp);
		window_write16(vp, MDIO_ENB_IN | MDIO_SHIFT_CLK,
			       4, Wn4_PhysicalMgmt);
		mdio_delay(vp);
	}

	spin_unlock_bh(&vp->mii_lock);
}

/* ACPI: Advanced Configuration and Power Interface. */
/* Set Wake-On-LAN mode and put the board into D3 (power-down) state. */
static void acpi_set_WOL(struct net_device *dev)
{
	struct vortex_private *vp = netdev_priv(dev);
	void __iomem *ioaddr = vp->ioaddr;

	device_set_wakeup_enable(vp->gendev, vp->enable_wol);

	if (vp->enable_wol) {
		/* Power up on: 1==Downloaded Filter, 2==Magic Packets, 4==Link Status. */
		window_write16(vp, 2, 7, 0x0c);
		/* The RxFilter must accept the WOL frames. */
		iowrite16(SetRxFilter|RxStation|RxMulticast|RxBroadcast, ioaddr + EL3_CMD);
		iowrite16(RxEnable, ioaddr + EL3_CMD);

		if (pci_enable_wake(VORTEX_PCI(vp), PCI_D3hot, 1)) {
			pr_info("%s: WOL not supported.\n", pci_name(VORTEX_PCI(vp)));

			vp->enable_wol = 0;
			return;
		}

		if (VORTEX_PCI(vp)->current_state < PCI_D3hot)
			return;

		/* Change the power state to D3; RxEnable doesn't take effect. */
		pci_set_power_state(VORTEX_PCI(vp), PCI_D3hot);
	}
}


static void vortex_remove_one(struct pci_dev *pdev)
{
	struct net_device *dev = pci_get_drvdata(pdev);
	struct vortex_private *vp;

	if (!dev) {
		pr_err("vortex_remove_one called for Compaq device!\n");
		BUG();
	}

	vp = netdev_priv(dev);

	if (vp->cb_fn_base)
		pci_iounmap(pdev, vp->cb_fn_base);

	unregister_netdev(dev);

	pci_set_power_state(pdev, PCI_D0);	/* Go active */
	if (vp->pm_state_valid)
		pci_restore_state(pdev);
	pci_disable_device(pdev);

	/* Should really use issue_and_wait() here */
	iowrite16(TotalReset | ((vp->drv_flags & EEPROM_RESET) ? 0x04 : 0x14),
	     vp->ioaddr + EL3_CMD);

	pci_iounmap(pdev, vp->ioaddr);

	pci_free_consistent(pdev,
						sizeof(struct boom_rx_desc) * RX_RING_SIZE
							+ sizeof(struct boom_tx_desc) * TX_RING_SIZE,
						vp->rx_ring,
						vp->rx_ring_dma);

	pci_release_regions(pdev);

	free_netdev(dev);
}


static struct pci_driver vortex_driver = {
	.name		= "3c59x",
	.probe		= vortex_init_one,
	.remove		= vortex_remove_one,
	.id_table	= vortex_pci_tbl,
	.driver.pm	= VORTEX_PM_OPS,
};


static int vortex_have_pci;
static int vortex_have_eisa;


static int __init vortex_init(void)
{
	int pci_rc, eisa_rc;

	pci_rc = pci_register_driver(&vortex_driver);
	eisa_rc = vortex_eisa_init();

	if (pci_rc == 0)
		vortex_have_pci = 1;
	if (eisa_rc > 0)
		vortex_have_eisa = 1;

	return (vortex_have_pci + vortex_have_eisa) ? 0 : -ENODEV;
}


static void __exit vortex_eisa_cleanup(void)
{
	void __iomem *ioaddr;

#ifdef CONFIG_EISA
	/* Take care of the EISA devices */
	eisa_driver_unregister(&vortex_eisa_driver);
#endif

	if (compaq_net_device) {
		ioaddr = ioport_map(compaq_net_device->base_addr,
		                    VORTEX_TOTAL_SIZE);

		unregister_netdev(compaq_net_device);
		iowrite16(TotalReset, ioaddr + EL3_CMD);
		release_region(compaq_net_device->base_addr,
		               VORTEX_TOTAL_SIZE);

		free_netdev(compaq_net_device);
	}
}


static void __exit vortex_cleanup(void)
{
	if (vortex_have_pci)
		pci_unregister_driver(&vortex_driver);
	if (vortex_have_eisa)
		vortex_eisa_cleanup();
}


module_init(vortex_init);
module_exit(vortex_cleanup);