aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/ixgbe/ixgbe_main.c
blob: c2095ce531c9b7fdb9785a0dea063f45516b8f10 (plain) (blame)
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
/*******************************************************************************

  Intel 10 Gigabit PCI Express Linux driver
  Copyright(c) 1999 - 2007 Intel Corporation.

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Contact Information:
  Linux NICS <linux.nics@intel.com>
  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

*******************************************************************************/

#include <linux/types.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/vmalloc.h>
#include <linux/string.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/ipv6.h>
#include <net/checksum.h>
#include <net/ip6_checksum.h>
#include <linux/ethtool.h>
#include <linux/if_vlan.h>

#include "ixgbe.h"
#include "ixgbe_common.h"

char ixgbe_driver_name[] = "ixgbe";
static const char ixgbe_driver_string[] =
	"Intel(R) 10 Gigabit PCI Express Network Driver";

#define DRV_VERSION "1.1.18"
const char ixgbe_driver_version[] = DRV_VERSION;
static const char ixgbe_copyright[] =
	 "Copyright (c) 1999-2007 Intel Corporation.";

static const struct ixgbe_info *ixgbe_info_tbl[] = {
	[board_82598]			= &ixgbe_82598_info,
};

/* ixgbe_pci_tbl - PCI Device ID Table
 *
 * Wildcard entries (PCI_ANY_ID) should come last
 * Last entry must be all 0s
 *
 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
 *   Class, Class Mask, private data (not used) }
 */
static struct pci_device_id ixgbe_pci_tbl[] = {
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
	 board_82598 },
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
	 board_82598 },
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT_DUAL_PORT),
	 board_82598 },
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
	 board_82598 },

	/* required last entry */
	{0, }
};
MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);

MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);

#define DEFAULT_DEBUG_LEVEL_SHIFT 3

static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
{
	u32 ctrl_ext;

	/* Let firmware take over control of h/w */
	ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
	IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
			ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
}

static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
{
	u32 ctrl_ext;

	/* Let firmware know the driver has taken over */
	ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
	IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
			ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
}

#ifdef DEBUG
/**
 * ixgbe_get_hw_dev_name - return device name string
 * used by hardware layer to print debugging information
 **/
char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw)
{
	struct ixgbe_adapter *adapter = hw->back;
	struct net_device *netdev = adapter->netdev;
	return netdev->name;
}
#endif

static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, u16 int_alloc_entry,
			   u8 msix_vector)
{
	u32 ivar, index;

	msix_vector |= IXGBE_IVAR_ALLOC_VAL;
	index = (int_alloc_entry >> 2) & 0x1F;
	ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR(index));
	ivar &= ~(0xFF << (8 * (int_alloc_entry & 0x3)));
	ivar |= (msix_vector << (8 * (int_alloc_entry & 0x3)));
	IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR(index), ivar);
}

static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
					     struct ixgbe_tx_buffer
					     *tx_buffer_info)
{
	if (tx_buffer_info->dma) {
		pci_unmap_page(adapter->pdev,
			       tx_buffer_info->dma,
			       tx_buffer_info->length, PCI_DMA_TODEVICE);
		tx_buffer_info->dma = 0;
	}
	if (tx_buffer_info->skb) {
		dev_kfree_skb_any(tx_buffer_info->skb);
		tx_buffer_info->skb = NULL;
	}
	/* tx_buffer_info must be completely set up in the transmit path */
}

static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
				       struct ixgbe_ring *tx_ring,
				       unsigned int eop,
				       union ixgbe_adv_tx_desc *eop_desc)
{
	/* Detect a transmit hang in hardware, this serializes the
	 * check with the clearing of time_stamp and movement of i */
	adapter->detect_tx_hung = false;
	if (tx_ring->tx_buffer_info[eop].dma &&
	    time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
	    !(IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & IXGBE_TFCS_TXOFF)) {
		/* detected Tx unit hang */
		DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
			"  TDH                  <%x>\n"
			"  TDT                  <%x>\n"
			"  next_to_use          <%x>\n"
			"  next_to_clean        <%x>\n"
			"tx_buffer_info[next_to_clean]\n"
			"  time_stamp           <%lx>\n"
			"  next_to_watch        <%x>\n"
			"  jiffies              <%lx>\n"
			"  next_to_watch.status <%x>\n",
			readl(adapter->hw.hw_addr + tx_ring->head),
			readl(adapter->hw.hw_addr + tx_ring->tail),
			tx_ring->next_to_use,
			tx_ring->next_to_clean,
			tx_ring->tx_buffer_info[eop].time_stamp,
			eop, jiffies, eop_desc->wb.status);
		return true;
	}

	return false;
}

#define IXGBE_MAX_TXD_PWR	14
#define IXGBE_MAX_DATA_PER_TXD	(1 << IXGBE_MAX_TXD_PWR)

/* Tx Descriptors needed, worst case */
#define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
			 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
#define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
	MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1)	/* for context */

/**
 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
 * @adapter: board private structure
 **/
static bool ixgbe_clean_tx_irq(struct ixgbe_adapter *adapter,
				    struct ixgbe_ring *tx_ring)
{
	struct net_device *netdev = adapter->netdev;
	union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
	struct ixgbe_tx_buffer *tx_buffer_info;
	unsigned int i, eop;
	bool cleaned = false;
	unsigned int total_tx_bytes = 0, total_tx_packets = 0;

	i = tx_ring->next_to_clean;
	eop = tx_ring->tx_buffer_info[i].next_to_watch;
	eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
	while (eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) {
		cleaned = false;
		while (!cleaned) {
			tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
			tx_buffer_info = &tx_ring->tx_buffer_info[i];
			cleaned = (i == eop);

			tx_ring->stats.bytes += tx_buffer_info->length;
			if (cleaned) {
				struct sk_buff *skb = tx_buffer_info->skb;
				unsigned int segs, bytecount;
				segs = skb_shinfo(skb)->gso_segs ?: 1;
				/* multiply data chunks by size of headers */
				bytecount = ((segs - 1) * skb_headlen(skb)) +
					    skb->len;
				total_tx_packets += segs;
				total_tx_bytes += bytecount;
			}
			ixgbe_unmap_and_free_tx_resource(adapter,
							 tx_buffer_info);
			tx_desc->wb.status = 0;

			i++;
			if (i == tx_ring->count)
				i = 0;
		}

		tx_ring->stats.packets++;

		eop = tx_ring->tx_buffer_info[i].next_to_watch;
		eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);

		/* weight of a sort for tx, avoid endless transmit cleanup */
		if (total_tx_packets >= tx_ring->work_limit)
			break;
	}

	tx_ring->next_to_clean = i;

#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
	if (total_tx_packets && netif_carrier_ok(netdev) &&
	    (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
		/* Make sure that anybody stopping the queue after this
		 * sees the new next_to_clean.
		 */
		smp_mb();
		if (netif_queue_stopped(netdev) &&
		    !test_bit(__IXGBE_DOWN, &adapter->state)) {
			netif_wake_queue(netdev);
			adapter->restart_queue++;
		}
	}

	if (adapter->detect_tx_hung)
		if (ixgbe_check_tx_hang(adapter, tx_ring, eop, eop_desc))
			netif_stop_queue(netdev);

	if (total_tx_packets >= tx_ring->work_limit)
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, tx_ring->eims_value);

	adapter->net_stats.tx_bytes += total_tx_bytes;
	adapter->net_stats.tx_packets += total_tx_packets;
	cleaned = total_tx_packets ? true : false;
	return cleaned;
}

/**
 * ixgbe_receive_skb - Send a completed packet up the stack
 * @adapter: board private structure
 * @skb: packet to send up
 * @is_vlan: packet has a VLAN tag
 * @tag: VLAN tag from descriptor
 **/
static void ixgbe_receive_skb(struct ixgbe_adapter *adapter,
			      struct sk_buff *skb, bool is_vlan,
			      u16 tag)
{
	if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
		if (adapter->vlgrp && is_vlan)
			vlan_hwaccel_receive_skb(skb, adapter->vlgrp, tag);
		else
			netif_receive_skb(skb);
	} else {

		if (adapter->vlgrp && is_vlan)
			vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
		else
			netif_rx(skb);
	}
}

/**
 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
 * @adapter: address of board private structure
 * @status_err: hardware indication of status of receive
 * @skb: skb currently being received and modified
 **/
static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
					 u32 status_err,
					 struct sk_buff *skb)
{
	skb->ip_summed = CHECKSUM_NONE;

	/* Ignore Checksum bit is set, or rx csum disabled */
	if ((status_err & IXGBE_RXD_STAT_IXSM) ||
	    !(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
		return;

	/* if IP and error */
	if ((status_err & IXGBE_RXD_STAT_IPCS) &&
	    (status_err & IXGBE_RXDADV_ERR_IPE)) {
		adapter->hw_csum_rx_error++;
		return;
	}

	if (!(status_err & IXGBE_RXD_STAT_L4CS))
		return;

	if (status_err & IXGBE_RXDADV_ERR_TCPE) {
		adapter->hw_csum_rx_error++;
		return;
	}

	/* It must be a TCP or UDP packet with a valid checksum */
	skb->ip_summed = CHECKSUM_UNNECESSARY;
	adapter->hw_csum_rx_good++;
}

/**
 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
 * @adapter: address of board private structure
 **/
static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
				       struct ixgbe_ring *rx_ring,
				       int cleaned_count)
{
	struct net_device *netdev = adapter->netdev;
	struct pci_dev *pdev = adapter->pdev;
	union ixgbe_adv_rx_desc *rx_desc;
	struct ixgbe_rx_buffer *rx_buffer_info;
	struct sk_buff *skb;
	unsigned int i;
	unsigned int bufsz = adapter->rx_buf_len + NET_IP_ALIGN;

	i = rx_ring->next_to_use;
	rx_buffer_info = &rx_ring->rx_buffer_info[i];

	while (cleaned_count--) {
		rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);

		if (!rx_buffer_info->page &&
				(adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) {
			rx_buffer_info->page = alloc_page(GFP_ATOMIC);
			if (!rx_buffer_info->page) {
				adapter->alloc_rx_page_failed++;
				goto no_buffers;
			}
			rx_buffer_info->page_dma =
			    pci_map_page(pdev, rx_buffer_info->page,
					 0, PAGE_SIZE, PCI_DMA_FROMDEVICE);
		}

		if (!rx_buffer_info->skb) {
			skb = netdev_alloc_skb(netdev, bufsz);

			if (!skb) {
				adapter->alloc_rx_buff_failed++;
				goto no_buffers;
			}

			/*
			 * Make buffer alignment 2 beyond a 16 byte boundary
			 * this will result in a 16 byte aligned IP header after
			 * the 14 byte MAC header is removed
			 */
			skb_reserve(skb, NET_IP_ALIGN);

			rx_buffer_info->skb = skb;
			rx_buffer_info->dma = pci_map_single(pdev, skb->data,
							  bufsz,
							  PCI_DMA_FROMDEVICE);
		}
		/* Refresh the desc even if buffer_addrs didn't change because
		 * each write-back erases this info. */
		if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
			rx_desc->read.pkt_addr =
			    cpu_to_le64(rx_buffer_info->page_dma);
			rx_desc->read.hdr_addr =
					cpu_to_le64(rx_buffer_info->dma);
		} else {
			rx_desc->read.pkt_addr =
					cpu_to_le64(rx_buffer_info->dma);
		}

		i++;
		if (i == rx_ring->count)
			i = 0;
		rx_buffer_info = &rx_ring->rx_buffer_info[i];
	}
no_buffers:
	if (rx_ring->next_to_use != i) {
		rx_ring->next_to_use = i;
		if (i-- == 0)
			i = (rx_ring->count - 1);

		/*
		 * Force memory writes to complete before letting h/w
		 * know there are new descriptors to fetch.  (Only
		 * applicable for weak-ordered memory model archs,
		 * such as IA-64).
		 */
		wmb();
		writel(i, adapter->hw.hw_addr + rx_ring->tail);
	}
}

static bool ixgbe_clean_rx_irq(struct ixgbe_adapter *adapter,
			       struct ixgbe_ring *rx_ring,
			       int *work_done, int work_to_do)
{
	struct net_device *netdev = adapter->netdev;
	struct pci_dev *pdev = adapter->pdev;
	union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
	struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
	struct sk_buff *skb;
	unsigned int i;
	u32 upper_len, len, staterr;
	u16 hdr_info, vlan_tag;
	bool is_vlan, cleaned = false;
	int cleaned_count = 0;
	unsigned int total_rx_bytes = 0, total_rx_packets = 0;

	i = rx_ring->next_to_clean;
	upper_len = 0;
	rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
	staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
	rx_buffer_info = &rx_ring->rx_buffer_info[i];
	is_vlan = (staterr & IXGBE_RXD_STAT_VP);
	vlan_tag = le16_to_cpu(rx_desc->wb.upper.vlan);

	while (staterr & IXGBE_RXD_STAT_DD) {
		if (*work_done >= work_to_do)
			break;
		(*work_done)++;

		if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
			hdr_info =
			    le16_to_cpu(rx_desc->wb.lower.lo_dword.hdr_info);
			len =
			    ((hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
			     IXGBE_RXDADV_HDRBUFLEN_SHIFT);
			if (hdr_info & IXGBE_RXDADV_SPH)
				adapter->rx_hdr_split++;
			if (len > IXGBE_RX_HDR_SIZE)
				len = IXGBE_RX_HDR_SIZE;
			upper_len = le16_to_cpu(rx_desc->wb.upper.length);
		} else
			len = le16_to_cpu(rx_desc->wb.upper.length);

		cleaned = true;
		skb = rx_buffer_info->skb;
		prefetch(skb->data - NET_IP_ALIGN);
		rx_buffer_info->skb = NULL;

		if (len && !skb_shinfo(skb)->nr_frags) {
			pci_unmap_single(pdev, rx_buffer_info->dma,
					 adapter->rx_buf_len + NET_IP_ALIGN,
					 PCI_DMA_FROMDEVICE);
			skb_put(skb, len);
		}

		if (upper_len) {
			pci_unmap_page(pdev, rx_buffer_info->page_dma,
				       PAGE_SIZE, PCI_DMA_FROMDEVICE);
			rx_buffer_info->page_dma = 0;
			skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
					   rx_buffer_info->page, 0, upper_len);
			rx_buffer_info->page = NULL;

			skb->len += upper_len;
			skb->data_len += upper_len;
			skb->truesize += upper_len;
		}

		i++;
		if (i == rx_ring->count)
			i = 0;
		next_buffer = &rx_ring->rx_buffer_info[i];

		next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
		prefetch(next_rxd);

		cleaned_count++;
		if (staterr & IXGBE_RXD_STAT_EOP) {
			rx_ring->stats.packets++;
			rx_ring->stats.bytes += skb->len;
		} else {
			rx_buffer_info->skb = next_buffer->skb;
			rx_buffer_info->dma = next_buffer->dma;
			next_buffer->skb = skb;
			adapter->non_eop_descs++;
			goto next_desc;
		}

		if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
			dev_kfree_skb_irq(skb);
			goto next_desc;
		}

		ixgbe_rx_checksum(adapter, staterr, skb);

		/* probably a little skewed due to removing CRC */
		total_rx_bytes += skb->len;
		total_rx_packets++;

		skb->protocol = eth_type_trans(skb, netdev);
		ixgbe_receive_skb(adapter, skb, is_vlan, vlan_tag);
		netdev->last_rx = jiffies;

next_desc:
		rx_desc->wb.upper.status_error = 0;

		/* return some buffers to hardware, one at a time is too slow */
		if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
			ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
			cleaned_count = 0;
		}

		/* use prefetched values */
		rx_desc = next_rxd;
		rx_buffer_info = next_buffer;

		staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
		is_vlan = (staterr & IXGBE_RXD_STAT_VP);
		vlan_tag = le16_to_cpu(rx_desc->wb.upper.vlan);
	}

	rx_ring->next_to_clean = i;
	cleaned_count = IXGBE_DESC_UNUSED(rx_ring);

	if (cleaned_count)
		ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);

	adapter->net_stats.rx_bytes += total_rx_bytes;
	adapter->net_stats.rx_packets += total_rx_packets;

	return cleaned;
}

#define IXGBE_MAX_INTR 10
/**
 * ixgbe_configure_msix - Configure MSI-X hardware
 * @adapter: board private structure
 *
 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
 * interrupts.
 **/
static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
{
	int i, vector = 0;

	for (i = 0; i < adapter->num_tx_queues; i++) {
		ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(i),
			       IXGBE_MSIX_VECTOR(vector));
		writel(EITR_INTS_PER_SEC_TO_REG(adapter->tx_eitr),
		       adapter->hw.hw_addr + adapter->tx_ring[i].itr_register);
		vector++;
	}

	for (i = 0; i < adapter->num_rx_queues; i++) {
		ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(i),
			       IXGBE_MSIX_VECTOR(vector));
		writel(EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr),
		       adapter->hw.hw_addr + adapter->rx_ring[i].itr_register);
		vector++;
	}

	vector = adapter->num_tx_queues + adapter->num_rx_queues;
	ixgbe_set_ivar(adapter, IXGBE_IVAR_OTHER_CAUSES_INDEX,
		       IXGBE_MSIX_VECTOR(vector));
	IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(vector), 1950);
}

static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
{
	struct net_device *netdev = data;
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	struct ixgbe_hw *hw = &adapter->hw;
	u32 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);

	if (eicr & IXGBE_EICR_LSC) {
		adapter->lsc_int++;
		if (!test_bit(__IXGBE_DOWN, &adapter->state))
			mod_timer(&adapter->watchdog_timer, jiffies);
	}

	if (!test_bit(__IXGBE_DOWN, &adapter->state))
		IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);

	return IRQ_HANDLED;
}

static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
{
	struct ixgbe_ring *txr = data;
	struct ixgbe_adapter *adapter = txr->adapter;

	ixgbe_clean_tx_irq(adapter, txr);

	return IRQ_HANDLED;
}

static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
{
	struct ixgbe_ring *rxr = data;
	struct ixgbe_adapter *adapter = rxr->adapter;

	IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, rxr->eims_value);
	netif_rx_schedule(adapter->netdev, &adapter->napi);
	return IRQ_HANDLED;
}

static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
{
	struct ixgbe_adapter *adapter = container_of(napi,
					struct ixgbe_adapter, napi);
	struct net_device *netdev = adapter->netdev;
	int work_done = 0;
	struct ixgbe_ring *rxr = adapter->rx_ring;

	/* Keep link state information with original netdev */
	if (!netif_carrier_ok(netdev))
		goto quit_polling;

	ixgbe_clean_rx_irq(adapter, rxr, &work_done, budget);

	/* If no Tx and not enough Rx work done, exit the polling mode */
	if ((work_done < budget) || !netif_running(netdev)) {
quit_polling:
		netif_rx_complete(netdev, napi);
		if (!test_bit(__IXGBE_DOWN, &adapter->state))
			IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS,
					rxr->eims_value);
	}

	return work_done;
}

/**
 * ixgbe_setup_msix - Initialize MSI-X interrupts
 *
 * ixgbe_setup_msix allocates MSI-X vectors and requests
 * interrutps from the kernel.
 **/
static int ixgbe_setup_msix(struct ixgbe_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	int i, int_vector = 0, err = 0;
	int max_msix_count;

	/* +1 for the LSC interrupt */
	max_msix_count = adapter->num_rx_queues + adapter->num_tx_queues + 1;
	adapter->msix_entries = kcalloc(max_msix_count,
					sizeof(struct msix_entry), GFP_KERNEL);
	if (!adapter->msix_entries)
		return -ENOMEM;

	for (i = 0; i < max_msix_count; i++)
		adapter->msix_entries[i].entry = i;

	err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
			      max_msix_count);
	if (err)
		goto out;

	for (i = 0; i < adapter->num_tx_queues; i++) {
		sprintf(adapter->tx_ring[i].name, "%s-tx%d", netdev->name, i);
		err = request_irq(adapter->msix_entries[int_vector].vector,
				  &ixgbe_msix_clean_tx,
				  0,
				  adapter->tx_ring[i].name,
				  &(adapter->tx_ring[i]));
		if (err) {
			DPRINTK(PROBE, ERR,
				"request_irq failed for MSIX interrupt "
				"Error: %d\n", err);
			goto release_irqs;
		}
		adapter->tx_ring[i].eims_value =
		    (1 << IXGBE_MSIX_VECTOR(int_vector));
		adapter->tx_ring[i].itr_register = IXGBE_EITR(int_vector);
		int_vector++;
	}

	for (i = 0; i < adapter->num_rx_queues; i++) {
		if (strlen(netdev->name) < (IFNAMSIZ - 5))
			sprintf(adapter->rx_ring[i].name,
				"%s-rx%d", netdev->name, i);
		else
			memcpy(adapter->rx_ring[i].name,
			       netdev->name, IFNAMSIZ);
		err = request_irq(adapter->msix_entries[int_vector].vector,
				  &ixgbe_msix_clean_rx, 0,
				  adapter->rx_ring[i].name,
				  &(adapter->rx_ring[i]));
		if (err) {
			DPRINTK(PROBE, ERR,
				"request_irq failed for MSIX interrupt "
				"Error: %d\n", err);
			goto release_irqs;
		}

		adapter->rx_ring[i].eims_value =
		    (1 << IXGBE_MSIX_VECTOR(int_vector));
		adapter->rx_ring[i].itr_register = IXGBE_EITR(int_vector);
		int_vector++;
	}

	sprintf(adapter->lsc_name, "%s-lsc", netdev->name);
	err = request_irq(adapter->msix_entries[int_vector].vector,
			  &ixgbe_msix_lsc, 0, adapter->lsc_name, netdev);
	if (err) {
		DPRINTK(PROBE, ERR,
			"request_irq for msix_lsc failed: %d\n", err);
		goto release_irqs;
	}

	/* FIXME: implement netif_napi_remove() instead */
	adapter->napi.poll = ixgbe_clean_rxonly;
	adapter->flags |= IXGBE_FLAG_MSIX_ENABLED;
	return 0;

release_irqs:
	int_vector--;
	for (; int_vector >= adapter->num_tx_queues; int_vector--)
		free_irq(adapter->msix_entries[int_vector].vector,
			 &(adapter->rx_ring[int_vector -
					    adapter->num_tx_queues]));

	for (; int_vector >= 0; int_vector--)
		free_irq(adapter->msix_entries[int_vector].vector,
			 &(adapter->tx_ring[int_vector]));
out:
	kfree(adapter->msix_entries);
	adapter->msix_entries = NULL;
	adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
	return err;
}

/**
 * ixgbe_intr - Interrupt Handler
 * @irq: interrupt number
 * @data: pointer to a network interface device structure
 * @pt_regs: CPU registers structure
 **/
static irqreturn_t ixgbe_intr(int irq, void *data)
{
	struct net_device *netdev = data;
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	struct ixgbe_hw *hw = &adapter->hw;
	u32 eicr;

	eicr = IXGBE_READ_REG(hw, IXGBE_EICR);

	if (!eicr)
		return IRQ_NONE;	/* Not our interrupt */

	if (eicr & IXGBE_EICR_LSC) {
		adapter->lsc_int++;
		if (!test_bit(__IXGBE_DOWN, &adapter->state))
			mod_timer(&adapter->watchdog_timer, jiffies);
	}
	if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
		/* Disable interrupts and register for poll. The flush of the
		 * posted write is intentionally left out. */
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
		__netif_rx_schedule(netdev, &adapter->napi);
	}

	return IRQ_HANDLED;
}

/**
 * ixgbe_request_irq - initialize interrupts
 * @adapter: board private structure
 *
 * Attempts to configure interrupts using the best available
 * capabilities of the hardware and kernel.
 **/
static int ixgbe_request_irq(struct ixgbe_adapter *adapter, u32 *num_rx_queues)
{
	struct net_device *netdev = adapter->netdev;
	int flags, err;
	irq_handler_t handler = ixgbe_intr;

	flags = IRQF_SHARED;

	err = ixgbe_setup_msix(adapter);
	if (!err)
		goto request_done;

	/*
	 * if we can't do MSI-X, fall through and try MSI
	 * No need to reallocate memory since we're decreasing the number of
	 * queues. We just won't use the other ones, also it is freed correctly
	 * on ixgbe_remove.
	 */
	*num_rx_queues = 1;

	/* do MSI */
	err = pci_enable_msi(adapter->pdev);
	if (!err) {
		adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
		flags &= ~IRQF_SHARED;
		handler = &ixgbe_intr;
	}

	err = request_irq(adapter->pdev->irq, handler, flags,
			  netdev->name, netdev);
	if (err)
		DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err);

request_done:
	return err;
}

static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;

	if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
		int i;

		for (i = 0; i < adapter->num_tx_queues; i++)
			free_irq(adapter->msix_entries[i].vector,
				 &(adapter->tx_ring[i]));
		for (i = 0; i < adapter->num_rx_queues; i++)
			free_irq(adapter->msix_entries[i +
						adapter->num_tx_queues].vector,
				&(adapter->rx_ring[i]));
		i = adapter->num_rx_queues + adapter->num_tx_queues;
		free_irq(adapter->msix_entries[i].vector, netdev);
		pci_disable_msix(adapter->pdev);
		kfree(adapter->msix_entries);
		adapter->msix_entries = NULL;
		adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
		return;
	}

	free_irq(adapter->pdev->irq, netdev);
	if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
		pci_disable_msi(adapter->pdev);
		adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
	}
}

/**
 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
 * @adapter: board private structure
 **/
static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
{
	IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
	IXGBE_WRITE_FLUSH(&adapter->hw);
	synchronize_irq(adapter->pdev->irq);
}

/**
 * ixgbe_irq_enable - Enable default interrupt generation settings
 * @adapter: board private structure
 **/
static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
{
	if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC,
				(IXGBE_EIMS_ENABLE_MASK &
				 ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC)));
	IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS,
			IXGBE_EIMS_ENABLE_MASK);
	IXGBE_WRITE_FLUSH(&adapter->hw);
}

/**
 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
 *
 **/
static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
{
	int i;
	struct ixgbe_hw *hw = &adapter->hw;

	if (adapter->rx_eitr)
		IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
				EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr));

	/* for re-triggering the interrupt in non-NAPI mode */
	adapter->rx_ring[0].eims_value = (1 << IXGBE_MSIX_VECTOR(0));
	adapter->tx_ring[0].eims_value = (1 << IXGBE_MSIX_VECTOR(0));

	ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(0), 0);
	for (i = 0; i < adapter->num_tx_queues; i++)
		ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(i), i);
}

/**
 * ixgbe_configure_tx - Configure 8254x Transmit Unit after Reset
 * @adapter: board private structure
 *
 * Configure the Tx unit of the MAC after a reset.
 **/
static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
{
	u64 tdba;
	struct ixgbe_hw *hw = &adapter->hw;
	u32 i, tdlen;

	/* Setup the HW Tx Head and Tail descriptor pointers */
	for (i = 0; i < adapter->num_tx_queues; i++) {
		tdba = adapter->tx_ring[i].dma;
		tdlen = adapter->tx_ring[i].count *
		    sizeof(union ixgbe_adv_tx_desc);
		IXGBE_WRITE_REG(hw, IXGBE_TDBAL(i), (tdba & DMA_32BIT_MASK));
		IXGBE_WRITE_REG(hw, IXGBE_TDBAH(i), (tdba >> 32));
		IXGBE_WRITE_REG(hw, IXGBE_TDLEN(i), tdlen);
		IXGBE_WRITE_REG(hw, IXGBE_TDH(i), 0);
		IXGBE_WRITE_REG(hw, IXGBE_TDT(i), 0);
		adapter->tx_ring[i].head = IXGBE_TDH(i);
		adapter->tx_ring[i].tail = IXGBE_TDT(i);
	}

	IXGBE_WRITE_REG(hw, IXGBE_TIPG, IXGBE_TIPG_FIBER_DEFAULT);
}

#define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
			(((S) & (PAGE_SIZE - 1)) ? 1 : 0))

#define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT			2
/**
 * ixgbe_configure_rx - Configure 8254x Receive Unit after Reset
 * @adapter: board private structure
 *
 * Configure the Rx unit of the MAC after a reset.
 **/
static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
{
	u64 rdba;
	struct ixgbe_hw *hw = &adapter->hw;
	struct net_device *netdev = adapter->netdev;
	int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
	u32 rdlen, rxctrl, rxcsum;
	u32 random[10];
	u32 reta, mrqc;
	int i;
	u32 fctrl, hlreg0;
	u32 srrctl;
	u32 pages;

	/* Decide whether to use packet split mode or not */
	if (netdev->mtu > ETH_DATA_LEN)
		adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
	else
		adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;

	/* Set the RX buffer length according to the mode */
	if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
		adapter->rx_buf_len = IXGBE_RX_HDR_SIZE;
	} else {
		if (netdev->mtu <= ETH_DATA_LEN)
			adapter->rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
		else
			adapter->rx_buf_len = ALIGN(max_frame, 1024);
	}

	fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
	fctrl |= IXGBE_FCTRL_BAM;
	IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);

	hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
	if (adapter->netdev->mtu <= ETH_DATA_LEN)
		hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
	else
		hlreg0 |= IXGBE_HLREG0_JUMBOEN;
	IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);

	pages = PAGE_USE_COUNT(adapter->netdev->mtu);

	srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(0));
	srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
	srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;

	if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
		srrctl |= PAGE_SIZE >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
		srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
		srrctl |= ((IXGBE_RX_HDR_SIZE <<
			    IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
			   IXGBE_SRRCTL_BSIZEHDR_MASK);
	} else {
		srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;

		if (adapter->rx_buf_len == MAXIMUM_ETHERNET_VLAN_SIZE)
			srrctl |=
			     IXGBE_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
		else
			srrctl |=
			     adapter->rx_buf_len >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
	}
	IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(0), srrctl);

	rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
	/* disable receives while setting up the descriptors */
	rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
	IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);

	/* Setup the HW Rx Head and Tail Descriptor Pointers and
	 * the Base and Length of the Rx Descriptor Ring */
	for (i = 0; i < adapter->num_rx_queues; i++) {
		rdba = adapter->rx_ring[i].dma;
		IXGBE_WRITE_REG(hw, IXGBE_RDBAL(i), (rdba & DMA_32BIT_MASK));
		IXGBE_WRITE_REG(hw, IXGBE_RDBAH(i), (rdba >> 32));
		IXGBE_WRITE_REG(hw, IXGBE_RDLEN(i), rdlen);
		IXGBE_WRITE_REG(hw, IXGBE_RDH(i), 0);
		IXGBE_WRITE_REG(hw, IXGBE_RDT(i), 0);
		adapter->rx_ring[i].head = IXGBE_RDH(i);
		adapter->rx_ring[i].tail = IXGBE_RDT(i);
	}

	if (adapter->num_rx_queues > 1) {
		/* Random 40bytes used as random key in RSS hash function */
		get_random_bytes(&random[0], 40);

		switch (adapter->num_rx_queues) {
		case 8:
		case 4:
			/* Bits [3:0] in each byte refers the Rx queue no */
			reta = 0x00010203;
			break;
		case 2:
			reta = 0x00010001;
			break;
		default:
			reta = 0x00000000;
			break;
		}

		/* Fill out redirection table */
		for (i = 0; i < 32; i++) {
			IXGBE_WRITE_REG_ARRAY(hw, IXGBE_RETA(0), i, reta);
			if (adapter->num_rx_queues > 4) {
				i++;
				IXGBE_WRITE_REG_ARRAY(hw, IXGBE_RETA(0), i,
						      0x04050607);
			}
		}

		/* Fill out hash function seeds */
		for (i = 0; i < 10; i++)
			IXGBE_WRITE_REG_ARRAY(hw, IXGBE_RSSRK(0), i, random[i]);

		mrqc = IXGBE_MRQC_RSSEN
		    /* Perform hash on these packet types */
		    | IXGBE_MRQC_RSS_FIELD_IPV4
		    | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
		    | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
		    | IXGBE_MRQC_RSS_FIELD_IPV6_EX_TCP
		    | IXGBE_MRQC_RSS_FIELD_IPV6_EX
		    | IXGBE_MRQC_RSS_FIELD_IPV6
		    | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
		    | IXGBE_MRQC_RSS_FIELD_IPV6_UDP
		    | IXGBE_MRQC_RSS_FIELD_IPV6_EX_UDP;
		IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);

		/* Multiqueue and packet checksumming are mutually exclusive. */
		rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
		rxcsum |= IXGBE_RXCSUM_PCSD;
		IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
	} else {
		/* Enable Receive Checksum Offload for TCP and UDP */
		rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
		if (adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
			/* Enable IPv4 payload checksum for UDP fragments
			 * Must be used in conjunction with packet-split. */
			rxcsum |= IXGBE_RXCSUM_IPPCSE;
		} else {
			/* don't need to clear IPPCSE as it defaults to 0 */
		}
		IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
	}
	/* Enable Receives */
	IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl);
	rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
}

static void ixgbe_vlan_rx_register(struct net_device *netdev,
				   struct vlan_group *grp)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	u32 ctrl;

	if (!test_bit(__IXGBE_DOWN, &adapter->state))
		ixgbe_irq_disable(adapter);
	adapter->vlgrp = grp;

	if (grp) {
		/* enable VLAN tag insert/strip */
		ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
		ctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
		ctrl &= ~IXGBE_VLNCTRL_CFIEN;
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
	}

	if (!test_bit(__IXGBE_DOWN, &adapter->state))
		ixgbe_irq_enable(adapter);
}

static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);

	/* add VID to filter table */
	ixgbe_set_vfta(&adapter->hw, vid, 0, true);
}

static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);

	if (!test_bit(__IXGBE_DOWN, &adapter->state))
		ixgbe_irq_disable(adapter);

	vlan_group_set_device(adapter->vlgrp, vid, NULL);

	if (!test_bit(__IXGBE_DOWN, &adapter->state))
		ixgbe_irq_enable(adapter);

	/* remove VID from filter table */
	ixgbe_set_vfta(&adapter->hw, vid, 0, false);
}

static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
{
	ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);

	if (adapter->vlgrp) {
		u16 vid;
		for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
			if (!vlan_group_get_device(adapter->vlgrp, vid))
				continue;
			ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
		}
	}
}

/**
 * ixgbe_set_multi - Multicast and Promiscuous mode set
 * @netdev: network interface device structure
 *
 * The set_multi entry point is called whenever the multicast address
 * list or the network interface flags are updated.  This routine is
 * responsible for configuring the hardware for proper multicast,
 * promiscuous mode, and all-multi behavior.
 **/
static void ixgbe_set_multi(struct net_device *netdev)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	struct ixgbe_hw *hw = &adapter->hw;
	struct dev_mc_list *mc_ptr;
	u8 *mta_list;
	u32 fctrl;
	int i;

	/* Check for Promiscuous and All Multicast modes */

	fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);

	if (netdev->flags & IFF_PROMISC) {
		fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
	} else if (netdev->flags & IFF_ALLMULTI) {
		fctrl |= IXGBE_FCTRL_MPE;
		fctrl &= ~IXGBE_FCTRL_UPE;
	} else {
		fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
	}

	IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);

	if (netdev->mc_count) {
		mta_list = kcalloc(netdev->mc_count, ETH_ALEN, GFP_ATOMIC);
		if (!mta_list)
			return;

		/* Shared function expects packed array of only addresses. */
		mc_ptr = netdev->mc_list;

		for (i = 0; i < netdev->mc_count; i++) {
			if (!mc_ptr)
				break;
			memcpy(mta_list + (i * ETH_ALEN), mc_ptr->dmi_addr,
			       ETH_ALEN);
			mc_ptr = mc_ptr->next;
		}

		ixgbe_update_mc_addr_list(hw, mta_list, i, 0);
		kfree(mta_list);
	} else {
		ixgbe_update_mc_addr_list(hw, NULL, 0, 0);
	}

}

static void ixgbe_configure(struct ixgbe_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	int i;

	ixgbe_set_multi(netdev);

	ixgbe_restore_vlan(adapter);

	ixgbe_configure_tx(adapter);
	ixgbe_configure_rx(adapter);
	for (i = 0; i < adapter->num_rx_queues; i++)
		ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i],
					   (adapter->rx_ring[i].count - 1));
}

static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	int i;
	u32 gpie = 0;
	struct ixgbe_hw *hw = &adapter->hw;
	u32 txdctl, rxdctl, mhadd;
	int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;

	ixgbe_get_hw_control(adapter);

	if (adapter->flags & (IXGBE_FLAG_MSIX_ENABLED |
			      IXGBE_FLAG_MSI_ENABLED)) {
		if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
			gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
				IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
		} else {
			/* MSI only */
			gpie = (IXGBE_GPIE_EIAME |
				IXGBE_GPIE_PBA_SUPPORT);
		}
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_GPIE, gpie);
		gpie = IXGBE_READ_REG(&adapter->hw, IXGBE_GPIE);
	}

	mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);

	if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
		mhadd &= ~IXGBE_MHADD_MFS_MASK;
		mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;

		IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
	}

	for (i = 0; i < adapter->num_tx_queues; i++) {
		txdctl = IXGBE_READ_REG(&adapter->hw, IXGBE_TXDCTL(i));
		txdctl |= IXGBE_TXDCTL_ENABLE;
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_TXDCTL(i), txdctl);
	}

	for (i = 0; i < adapter->num_rx_queues; i++) {
		rxdctl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXDCTL(i));
		rxdctl |= IXGBE_RXDCTL_ENABLE;
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXDCTL(i), rxdctl);
	}
	/* enable all receives */
	rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
	rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
	IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxdctl);

	if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
		ixgbe_configure_msix(adapter);
	else
		ixgbe_configure_msi_and_legacy(adapter);

	clear_bit(__IXGBE_DOWN, &adapter->state);
	napi_enable(&adapter->napi);
	ixgbe_irq_enable(adapter);

	/* bring the link up in the watchdog, this could race with our first
	 * link up interrupt but shouldn't be a problem */
	mod_timer(&adapter->watchdog_timer, jiffies);
	return 0;
}

void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
{
	WARN_ON(in_interrupt());
	while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
		msleep(1);
	ixgbe_down(adapter);
	ixgbe_up(adapter);
	clear_bit(__IXGBE_RESETTING, &adapter->state);
}

int ixgbe_up(struct ixgbe_adapter *adapter)
{
	/* hardware has been reset, we need to reload some things */
	ixgbe_configure(adapter);

	return ixgbe_up_complete(adapter);
}

void ixgbe_reset(struct ixgbe_adapter *adapter)
{
	if (ixgbe_init_hw(&adapter->hw))
		DPRINTK(PROBE, ERR, "Hardware Error\n");

	/* reprogram the RAR[0] in case user changed it. */
	ixgbe_set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV);

}

#ifdef CONFIG_PM
static int ixgbe_resume(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	u32 err, num_rx_queues = adapter->num_rx_queues;

	pci_set_power_state(pdev, PCI_D0);
	pci_restore_state(pdev);
	err = pci_enable_device(pdev);
	if (err) {
		printk(KERN_ERR "ixgbe: Cannot enable PCI device from " \
				"suspend\n");
		return err;
	}
	pci_set_master(pdev);

	pci_enable_wake(pdev, PCI_D3hot, 0);
	pci_enable_wake(pdev, PCI_D3cold, 0);

	if (netif_running(netdev)) {
		err = ixgbe_request_irq(adapter, &num_rx_queues);
		if (err)
			return err;
	}

	ixgbe_reset(adapter);

	if (netif_running(netdev))
		ixgbe_up(adapter);

	netif_device_attach(netdev);

	return 0;
}
#endif

/**
 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
 * @adapter: board private structure
 * @rx_ring: ring to free buffers from
 **/
static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
				struct ixgbe_ring *rx_ring)
{
	struct pci_dev *pdev = adapter->pdev;
	unsigned long size;
	unsigned int i;

	/* Free all the Rx ring sk_buffs */

	for (i = 0; i < rx_ring->count; i++) {
		struct ixgbe_rx_buffer *rx_buffer_info;

		rx_buffer_info = &rx_ring->rx_buffer_info[i];
		if (rx_buffer_info->dma) {
			pci_unmap_single(pdev, rx_buffer_info->dma,
					 adapter->rx_buf_len,
					 PCI_DMA_FROMDEVICE);
			rx_buffer_info->dma = 0;
		}
		if (rx_buffer_info->skb) {
			dev_kfree_skb(rx_buffer_info->skb);
			rx_buffer_info->skb = NULL;
		}
		if (!rx_buffer_info->page)
			continue;
		pci_unmap_page(pdev, rx_buffer_info->page_dma, PAGE_SIZE,
			       PCI_DMA_FROMDEVICE);
		rx_buffer_info->page_dma = 0;

		put_page(rx_buffer_info->page);
		rx_buffer_info->page = NULL;
	}

	size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
	memset(rx_ring->rx_buffer_info, 0, size);

	/* Zero out the descriptor ring */
	memset(rx_ring->desc, 0, rx_ring->size);

	rx_ring->next_to_clean = 0;
	rx_ring->next_to_use = 0;

	writel(0, adapter->hw.hw_addr + rx_ring->head);
	writel(0, adapter->hw.hw_addr + rx_ring->tail);
}

/**
 * ixgbe_clean_tx_ring - Free Tx Buffers
 * @adapter: board private structure
 * @tx_ring: ring to be cleaned
 **/
static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
				struct ixgbe_ring *tx_ring)
{
	struct ixgbe_tx_buffer *tx_buffer_info;
	unsigned long size;
	unsigned int i;

	/* Free all the Tx ring sk_buffs */

	for (i = 0; i < tx_ring->count; i++) {
		tx_buffer_info = &tx_ring->tx_buffer_info[i];
		ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
	}

	size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
	memset(tx_ring->tx_buffer_info, 0, size);

	/* Zero out the descriptor ring */
	memset(tx_ring->desc, 0, tx_ring->size);

	tx_ring->next_to_use = 0;
	tx_ring->next_to_clean = 0;

	writel(0, adapter->hw.hw_addr + tx_ring->head);
	writel(0, adapter->hw.hw_addr + tx_ring->tail);
}

/**
 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
 * @adapter: board private structure
 **/
static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
{
	int i;

	for (i = 0; i < adapter->num_tx_queues; i++)
		ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
}

/**
 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
 * @adapter: board private structure
 **/
static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
{
	int i;

	for (i = 0; i < adapter->num_rx_queues; i++)
		ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
}

void ixgbe_down(struct ixgbe_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	u32 rxctrl;

	/* signal that we are down to the interrupt handler */
	set_bit(__IXGBE_DOWN, &adapter->state);

	/* disable receives */
	rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXCTRL);
	IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXCTRL,
			rxctrl & ~IXGBE_RXCTRL_RXEN);

	netif_tx_disable(netdev);

	/* disable transmits in the hardware */

	/* flush both disables */
	IXGBE_WRITE_FLUSH(&adapter->hw);
	msleep(10);

	napi_disable(&adapter->napi);

	ixgbe_irq_disable(adapter);

	del_timer_sync(&adapter->watchdog_timer);

	netif_carrier_off(netdev);
	netif_stop_queue(netdev);

	ixgbe_reset(adapter);
	ixgbe_clean_all_tx_rings(adapter);
	ixgbe_clean_all_rx_rings(adapter);

}

static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
#ifdef CONFIG_PM
	int retval = 0;
#endif

	netif_device_detach(netdev);

	if (netif_running(netdev)) {
		ixgbe_down(adapter);
		ixgbe_free_irq(adapter);
	}

#ifdef CONFIG_PM
	retval = pci_save_state(pdev);
	if (retval)
		return retval;
#endif

	pci_enable_wake(pdev, PCI_D3hot, 0);
	pci_enable_wake(pdev, PCI_D3cold, 0);

	ixgbe_release_hw_control(adapter);

	pci_disable_device(pdev);

	pci_set_power_state(pdev, pci_choose_state(pdev, state));

	return 0;
}

static void ixgbe_shutdown(struct pci_dev *pdev)
{
	ixgbe_suspend(pdev, PMSG_SUSPEND);
}

/**
 * ixgbe_clean - NAPI Rx polling callback
 * @adapter: board private structure
 **/
static int ixgbe_clean(struct napi_struct *napi, int budget)
{
	struct ixgbe_adapter *adapter = container_of(napi,
					struct ixgbe_adapter, napi);
	struct net_device *netdev = adapter->netdev;
	int tx_cleaned = 0, work_done = 0;

	/* In non-MSIX case, there is no multi-Tx/Rx queue */
	tx_cleaned = ixgbe_clean_tx_irq(adapter, adapter->tx_ring);
	ixgbe_clean_rx_irq(adapter, &adapter->rx_ring[0], &work_done,
			   budget);

	if (tx_cleaned)
		work_done = budget;

	/* If budget not fully consumed, exit the polling mode */
	if (work_done < budget) {
		netif_rx_complete(netdev, napi);
		if (!test_bit(__IXGBE_DOWN, &adapter->state))
			ixgbe_irq_enable(adapter);
	}

	return work_done;
}

/**
 * ixgbe_tx_timeout - Respond to a Tx Hang
 * @netdev: network interface device structure
 **/
static void ixgbe_tx_timeout(struct net_device *netdev)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);

	/* Do the reset outside of interrupt context */
	schedule_work(&adapter->reset_task);
}

static void ixgbe_reset_task(struct work_struct *work)
{
	struct ixgbe_adapter *adapter;
	adapter = container_of(work, struct ixgbe_adapter, reset_task);

	adapter->tx_timeout_count++;

	ixgbe_reinit_locked(adapter);
}

/**
 * ixgbe_alloc_queues - Allocate memory for all rings
 * @adapter: board private structure to initialize
 *
 * We allocate one ring per queue at run-time since we don't know the
 * number of queues at compile-time.  The polling_netdev array is
 * intended for Multiqueue, but should work fine with a single queue.
 **/
static int __devinit ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
{
	int i;

	adapter->tx_ring = kcalloc(adapter->num_tx_queues,
				   sizeof(struct ixgbe_ring), GFP_KERNEL);
	if (!adapter->tx_ring)
		return -ENOMEM;

	for (i = 0; i < adapter->num_tx_queues; i++)
		adapter->tx_ring[i].count = IXGBE_DEFAULT_TXD;

	adapter->rx_ring = kcalloc(adapter->num_rx_queues,
				   sizeof(struct ixgbe_ring), GFP_KERNEL);
	if (!adapter->rx_ring) {
		kfree(adapter->tx_ring);
		return -ENOMEM;
	}

	for (i = 0; i < adapter->num_rx_queues; i++) {
		adapter->rx_ring[i].adapter = adapter;
		adapter->rx_ring[i].itr_register = IXGBE_EITR(i);
		adapter->rx_ring[i].count = IXGBE_DEFAULT_RXD;
	}

	return 0;
}

/**
 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
 * @adapter: board private structure to initialize
 *
 * ixgbe_sw_init initializes the Adapter private data structure.
 * Fields are initialized based on PCI device information and
 * OS network device settings (MTU size).
 **/
static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	struct pci_dev *pdev = adapter->pdev;

	/* default flow control settings */
	hw->fc.original_type = ixgbe_fc_full;
	hw->fc.type = ixgbe_fc_full;

	hw->mac.link_mode_select = IXGBE_AUTOC_LMS_10G_LINK_NO_AN;
	if (hw->mac.ops.reset(hw)) {
		dev_err(&pdev->dev, "HW Init failed\n");
		return -EIO;
	}
	if (hw->mac.ops.setup_link_speed(hw, IXGBE_LINK_SPEED_10GB_FULL, true,
					 false)) {
		dev_err(&pdev->dev, "Link Speed setup failed\n");
		return -EIO;
	}

	/* initialize eeprom parameters */
	if (ixgbe_init_eeprom(hw)) {
		dev_err(&pdev->dev, "EEPROM initialization failed\n");
		return -EIO;
	}

	/* Set the default values */
	adapter->num_rx_queues = IXGBE_DEFAULT_RXQ;
	adapter->num_tx_queues = 1;
	adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;

	if (ixgbe_alloc_queues(adapter)) {
		dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
		return -ENOMEM;
	}

	set_bit(__IXGBE_DOWN, &adapter->state);

	return 0;
}

/**
 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
 * @adapter: board private structure
 * @txdr:    tx descriptor ring (for a specific queue) to setup
 *
 * Return 0 on success, negative on failure
 **/
int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
			     struct ixgbe_ring *txdr)
{
	struct pci_dev *pdev = adapter->pdev;
	int size;

	size = sizeof(struct ixgbe_tx_buffer) * txdr->count;
	txdr->tx_buffer_info = vmalloc(size);
	if (!txdr->tx_buffer_info) {
		DPRINTK(PROBE, ERR,
		"Unable to allocate memory for the transmit descriptor ring\n");
		return -ENOMEM;
	}
	memset(txdr->tx_buffer_info, 0, size);

	/* round up to nearest 4K */
	txdr->size = txdr->count * sizeof(union ixgbe_adv_tx_desc);
	txdr->size = ALIGN(txdr->size, 4096);

	txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
	if (!txdr->desc) {
		vfree(txdr->tx_buffer_info);
		DPRINTK(PROBE, ERR,
			"Memory allocation failed for the tx desc ring\n");
		return -ENOMEM;
	}

	txdr->adapter = adapter;
	txdr->next_to_use = 0;
	txdr->next_to_clean = 0;
	txdr->work_limit = txdr->count;

	return 0;
}

/**
 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
 * @adapter: board private structure
 * @rxdr:    rx descriptor ring (for a specific queue) to setup
 *
 * Returns 0 on success, negative on failure
 **/
int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
			     struct ixgbe_ring *rxdr)
{
	struct pci_dev *pdev = adapter->pdev;
	int size, desc_len;

	size = sizeof(struct ixgbe_rx_buffer) * rxdr->count;
	rxdr->rx_buffer_info = vmalloc(size);
	if (!rxdr->rx_buffer_info) {
		DPRINTK(PROBE, ERR,
			"vmalloc allocation failed for the rx desc ring\n");
		return -ENOMEM;
	}
	memset(rxdr->rx_buffer_info, 0, size);

	desc_len = sizeof(union ixgbe_adv_rx_desc);

	/* Round up to nearest 4K */
	rxdr->size = rxdr->count * desc_len;
	rxdr->size = ALIGN(rxdr->size, 4096);

	rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);

	if (!rxdr->desc) {
		DPRINTK(PROBE, ERR,
			"Memory allocation failed for the rx desc ring\n");
		vfree(rxdr->rx_buffer_info);
		return -ENOMEM;
	}

	rxdr->next_to_clean = 0;
	rxdr->next_to_use = 0;
	rxdr->adapter = adapter;

	return 0;
}

/**
 * ixgbe_free_tx_resources - Free Tx Resources per Queue
 * @adapter: board private structure
 * @tx_ring: Tx descriptor ring for a specific queue
 *
 * Free all transmit software resources
 **/
static void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
				    struct ixgbe_ring *tx_ring)
{
	struct pci_dev *pdev = adapter->pdev;

	ixgbe_clean_tx_ring(adapter, tx_ring);

	vfree(tx_ring->tx_buffer_info);
	tx_ring->tx_buffer_info = NULL;

	pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);

	tx_ring->desc = NULL;
}

/**
 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
 * @adapter: board private structure
 *
 * Free all transmit software resources
 **/
static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
{
	int i;

	for (i = 0; i < adapter->num_tx_queues; i++)
		ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
}

/**
 * ixgbe_free_rx_resources - Free Rx Resources
 * @adapter: board private structure
 * @rx_ring: ring to clean the resources from
 *
 * Free all receive software resources
 **/
static void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
				    struct ixgbe_ring *rx_ring)
{
	struct pci_dev *pdev = adapter->pdev;

	ixgbe_clean_rx_ring(adapter, rx_ring);

	vfree(rx_ring->rx_buffer_info);
	rx_ring->rx_buffer_info = NULL;

	pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);

	rx_ring->desc = NULL;
}

/**
 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
 * @adapter: board private structure
 *
 * Free all receive software resources
 **/
static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
{
	int i;

	for (i = 0; i < adapter->num_rx_queues; i++)
		ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
}

/**
 * ixgbe_setup_all_tx_resources - wrapper to allocate Tx resources
 *				  (Descriptors) for all queues
 * @adapter: board private structure
 *
 * If this function returns with an error, then it's possible one or
 * more of the rings is populated (while the rest are not).  It is the
 * callers duty to clean those orphaned rings.
 *
 * Return 0 on success, negative on failure
 **/
static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
{
	int i, err = 0;

	for (i = 0; i < adapter->num_tx_queues; i++) {
		err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]);
		if (err) {
			DPRINTK(PROBE, ERR,
				"Allocation for Tx Queue %u failed\n", i);
			break;
		}
	}

	return err;
}

/**
 * ixgbe_setup_all_rx_resources - wrapper to allocate Rx resources
 *				  (Descriptors) for all queues
 * @adapter: board private structure
 *
 * If this function returns with an error, then it's possible one or
 * more of the rings is populated (while the rest are not).  It is the
 * callers duty to clean those orphaned rings.
 *
 * Return 0 on success, negative on failure
 **/

static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
{
	int i, err = 0;

	for (i = 0; i < adapter->num_rx_queues; i++) {
		err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]);
		if (err) {
			DPRINTK(PROBE, ERR,
				"Allocation for Rx Queue %u failed\n", i);
			break;
		}
	}

	return err;
}

/**
 * ixgbe_change_mtu - Change the Maximum Transfer Unit
 * @netdev: network interface device structure
 * @new_mtu: new value for maximum frame size
 *
 * Returns 0 on success, negative on failure
 **/
static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;

	if ((max_frame < (ETH_ZLEN + ETH_FCS_LEN)) ||
	    (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
		return -EINVAL;

	netdev->mtu = new_mtu;

	if (netif_running(netdev))
		ixgbe_reinit_locked(adapter);

	return 0;
}

/**
 * ixgbe_open - Called when a network interface is made active
 * @netdev: network interface device structure
 *
 * Returns 0 on success, negative value on failure
 *
 * The open entry point is called when a network interface is made
 * active by the system (IFF_UP).  At this point all resources needed
 * for transmit and receive operations are allocated, the interrupt
 * handler is registered with the OS, the watchdog timer is started,
 * and the stack is notified that the interface is ready.
 **/
static int ixgbe_open(struct net_device *netdev)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	int err;
	u32 num_rx_queues = adapter->num_rx_queues;

	/* disallow open during test */
	if (test_bit(__IXGBE_TESTING, &adapter->state))
		return -EBUSY;

try_intr_reinit:
	/* allocate transmit descriptors */
	err = ixgbe_setup_all_tx_resources(adapter);
	if (err)
		goto err_setup_tx;

	if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
		num_rx_queues = 1;
		adapter->num_rx_queues = num_rx_queues;
	}

	/* allocate receive descriptors */
	err = ixgbe_setup_all_rx_resources(adapter);
	if (err)
		goto err_setup_rx;

	ixgbe_configure(adapter);

	err = ixgbe_request_irq(adapter, &num_rx_queues);
	if (err)
		goto err_req_irq;

	/* ixgbe_request might have reduced num_rx_queues */
	if (num_rx_queues < adapter->num_rx_queues) {
		/* We didn't get MSI-X, so we need to release everything,
		 * set our Rx queue count to num_rx_queues, and redo the
		 * whole init process.
		 */
		ixgbe_free_irq(adapter);
		if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
			pci_disable_msi(adapter->pdev);
			adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
		}
		ixgbe_free_all_rx_resources(adapter);
		ixgbe_free_all_tx_resources(adapter);
		adapter->num_rx_queues = num_rx_queues;

		/* Reset the hardware, and start over. */
		ixgbe_reset(adapter);

		goto try_intr_reinit;
	}

	err = ixgbe_up_complete(adapter);
	if (err)
		goto err_up;

	return 0;

err_up:
	ixgbe_release_hw_control(adapter);
	ixgbe_free_irq(adapter);
err_req_irq:
	ixgbe_free_all_rx_resources(adapter);
err_setup_rx:
	ixgbe_free_all_tx_resources(adapter);
err_setup_tx:
	ixgbe_reset(adapter);

	return err;
}

/**
 * ixgbe_close - Disables a network interface
 * @netdev: network interface device structure
 *
 * Returns 0, this is not allowed to fail
 *
 * The close entry point is called when an interface is de-activated
 * by the OS.  The hardware is still under the drivers control, but
 * needs to be disabled.  A global MAC reset is issued to stop the
 * hardware, and all transmit and receive resources are freed.
 **/
static int ixgbe_close(struct net_device *netdev)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);

	ixgbe_down(adapter);
	ixgbe_free_irq(adapter);

	ixgbe_free_all_tx_resources(adapter);
	ixgbe_free_all_rx_resources(adapter);

	ixgbe_release_hw_control(adapter);

	return 0;
}

/**
 * ixgbe_update_stats - Update the board statistics counters.
 * @adapter: board private structure
 **/
void ixgbe_update_stats(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u64 total_mpc = 0;
	u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;

	adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
	for (i = 0; i < 8; i++) {
		/* for packet buffers not used, the register should read 0 */
		mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
		missed_rx += mpc;
		adapter->stats.mpc[i] += mpc;
		total_mpc += adapter->stats.mpc[i];
		adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
	}
	adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
	/* work around hardware counting issue */
	adapter->stats.gprc -= missed_rx;

	/* 82598 hardware only has a 32 bit counter in the high register */
	adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
	adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
	adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
	bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
	adapter->stats.bprc += bprc;
	adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
	adapter->stats.mprc -= bprc;
	adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
	adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
	adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
	adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
	adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
	adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
	adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
	adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
	adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
	adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
	lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
	adapter->stats.lxontxc += lxon;
	lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
	adapter->stats.lxofftxc += lxoff;
	adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
	adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
	adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
	/*
	 * 82598 errata - tx of flow control packets is included in tx counters
	 */
	xon_off_tot = lxon + lxoff;
	adapter->stats.gptc -= xon_off_tot;
	adapter->stats.mptc -= xon_off_tot;
	adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
	adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
	adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
	adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
	adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
	adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
	adapter->stats.ptc64 -= xon_off_tot;
	adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
	adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
	adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
	adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
	adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
	adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);

	/* Fill out the OS statistics structure */
	adapter->net_stats.multicast = adapter->stats.mprc;

	/* Rx Errors */
	adapter->net_stats.rx_errors = adapter->stats.crcerrs +
						adapter->stats.rlec;
	adapter->net_stats.rx_dropped = 0;
	adapter->net_stats.rx_length_errors = adapter->stats.rlec;
	adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
	adapter->net_stats.rx_missed_errors = total_mpc;
}

/**
 * ixgbe_watchdog - Timer Call-back
 * @data: pointer to adapter cast into an unsigned long
 **/
static void ixgbe_watchdog(unsigned long data)
{
	struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
	struct net_device *netdev = adapter->netdev;
	bool link_up;
	u32 link_speed = 0;

	adapter->hw.mac.ops.check_link(&adapter->hw, &(link_speed), &link_up);

	if (link_up) {
		if (!netif_carrier_ok(netdev)) {
			u32 frctl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
			u32 rmcs = IXGBE_READ_REG(&adapter->hw, IXGBE_RMCS);
#define FLOW_RX (frctl & IXGBE_FCTRL_RFCE)
#define FLOW_TX (rmcs & IXGBE_RMCS_TFCE_802_3X)
			DPRINTK(LINK, INFO, "NIC Link is Up %s, "
				"Flow Control: %s\n",
				(link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
				 "10 Gbps" :
				 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
				  "1 Gbps" : "unknown speed")),
				((FLOW_RX && FLOW_TX) ? "RX/TX" :
				 (FLOW_RX ? "RX" :
				 (FLOW_TX ? "TX" : "None"))));

			netif_carrier_on(netdev);
			netif_wake_queue(netdev);
		} else {
			/* Force detection of hung controller */
			adapter->detect_tx_hung = true;
		}
	} else {
		if (netif_carrier_ok(netdev)) {
			DPRINTK(LINK, INFO, "NIC Link is Down\n");
			netif_carrier_off(netdev);
			netif_stop_queue(netdev);
		}
	}

	ixgbe_update_stats(adapter);

	/* Reset the timer */
	if (!test_bit(__IXGBE_DOWN, &adapter->state))
		mod_timer(&adapter->watchdog_timer,
			  round_jiffies(jiffies + 2 * HZ));
}

static int ixgbe_tso(struct ixgbe_adapter *adapter,
			 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
			 u32 tx_flags, u8 *hdr_len)
{
	struct ixgbe_adv_tx_context_desc *context_desc;
	unsigned int i;
	int err;
	struct ixgbe_tx_buffer *tx_buffer_info;
	u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
	u32 mss_l4len_idx = 0, l4len;
	*hdr_len = 0;

	if (skb_is_gso(skb)) {
		if (skb_header_cloned(skb)) {
			err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
			if (err)
				return err;
		}
		l4len = tcp_hdrlen(skb);
		*hdr_len += l4len;

		if (skb->protocol == htons(ETH_P_IP)) {
			struct iphdr *iph = ip_hdr(skb);
			iph->tot_len = 0;
			iph->check = 0;
			tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
								 iph->daddr, 0,
								 IPPROTO_TCP,
								 0);
			adapter->hw_tso_ctxt++;
		} else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
			ipv6_hdr(skb)->payload_len = 0;
			tcp_hdr(skb)->check =
			    ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
					     &ipv6_hdr(skb)->daddr,
					     0, IPPROTO_TCP, 0);
			adapter->hw_tso6_ctxt++;
		}

		i = tx_ring->next_to_use;

		tx_buffer_info = &tx_ring->tx_buffer_info[i];
		context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);

		/* VLAN MACLEN IPLEN */
		if (tx_flags & IXGBE_TX_FLAGS_VLAN)
			vlan_macip_lens |=
			    (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
		vlan_macip_lens |= ((skb_network_offset(skb)) <<
				    IXGBE_ADVTXD_MACLEN_SHIFT);
		*hdr_len += skb_network_offset(skb);
		vlan_macip_lens |=
		    (skb_transport_header(skb) - skb_network_header(skb));
		*hdr_len +=
		    (skb_transport_header(skb) - skb_network_header(skb));
		context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
		context_desc->seqnum_seed = 0;

		/* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
		type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
				    IXGBE_ADVTXD_DTYP_CTXT);

		if (skb->protocol == htons(ETH_P_IP))
			type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
		type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
		context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);

		/* MSS L4LEN IDX */
		mss_l4len_idx |=
		    (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
		mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
		context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);

		tx_buffer_info->time_stamp = jiffies;
		tx_buffer_info->next_to_watch = i;

		i++;
		if (i == tx_ring->count)
			i = 0;
		tx_ring->next_to_use = i;

		return true;
	}
	return false;
}

static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
				   struct ixgbe_ring *tx_ring,
				   struct sk_buff *skb, u32 tx_flags)
{
	struct ixgbe_adv_tx_context_desc *context_desc;
	unsigned int i;
	struct ixgbe_tx_buffer *tx_buffer_info;
	u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;

	if (skb->ip_summed == CHECKSUM_PARTIAL ||
	    (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
		i = tx_ring->next_to_use;
		tx_buffer_info = &tx_ring->tx_buffer_info[i];
		context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);

		if (tx_flags & IXGBE_TX_FLAGS_VLAN)
			vlan_macip_lens |=
			    (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
		vlan_macip_lens |= (skb_network_offset(skb) <<
				    IXGBE_ADVTXD_MACLEN_SHIFT);
		if (skb->ip_summed == CHECKSUM_PARTIAL)
			vlan_macip_lens |= (skb_transport_header(skb) -
					    skb_network_header(skb));

		context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
		context_desc->seqnum_seed = 0;

		type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
				    IXGBE_ADVTXD_DTYP_CTXT);

		if (skb->ip_summed == CHECKSUM_PARTIAL) {
			switch (skb->protocol) {
			case __constant_htons(ETH_P_IP):
				type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
				if (ip_hdr(skb)->protocol == IPPROTO_TCP)
					type_tucmd_mlhl |=
						IXGBE_ADVTXD_TUCMD_L4T_TCP;
				break;

			case __constant_htons(ETH_P_IPV6):
				/* XXX what about other V6 headers?? */
				if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
					type_tucmd_mlhl |=
						IXGBE_ADVTXD_TUCMD_L4T_TCP;
				break;

			default:
				if (unlikely(net_ratelimit())) {
					DPRINTK(PROBE, WARNING,
					 "partial checksum but proto=%x!\n",
					 skb->protocol);
				}
				break;
			}
		}

		context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
		context_desc->mss_l4len_idx = 0;

		tx_buffer_info->time_stamp = jiffies;
		tx_buffer_info->next_to_watch = i;
		adapter->hw_csum_tx_good++;
		i++;
		if (i == tx_ring->count)
			i = 0;
		tx_ring->next_to_use = i;

		return true;
	}
	return false;
}

static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
			struct ixgbe_ring *tx_ring,
			struct sk_buff *skb, unsigned int first)
{
	struct ixgbe_tx_buffer *tx_buffer_info;
	unsigned int len = skb->len;
	unsigned int offset = 0, size, count = 0, i;
	unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
	unsigned int f;

	len -= skb->data_len;

	i = tx_ring->next_to_use;

	while (len) {
		tx_buffer_info = &tx_ring->tx_buffer_info[i];
		size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);

		tx_buffer_info->length = size;
		tx_buffer_info->dma = pci_map_single(adapter->pdev,
						  skb->data + offset,
						  size, PCI_DMA_TODEVICE);
		tx_buffer_info->time_stamp = jiffies;
		tx_buffer_info->next_to_watch = i;

		len -= size;
		offset += size;
		count++;
		i++;
		if (i == tx_ring->count)
			i = 0;
	}

	for (f = 0; f < nr_frags; f++) {
		struct skb_frag_struct *frag;

		frag = &skb_shinfo(skb)->frags[f];
		len = frag->size;
		offset = frag->page_offset;

		while (len) {
			tx_buffer_info = &tx_ring->tx_buffer_info[i];
			size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);

			tx_buffer_info->length = size;
			tx_buffer_info->dma = pci_map_page(adapter->pdev,
							frag->page,
							offset,
							size, PCI_DMA_TODEVICE);
			tx_buffer_info->time_stamp = jiffies;
			tx_buffer_info->next_to_watch = i;

			len -= size;
			offset += size;
			count++;
			i++;
			if (i == tx_ring->count)
				i = 0;
		}
	}
	if (i == 0)
		i = tx_ring->count - 1;
	else
		i = i - 1;
	tx_ring->tx_buffer_info[i].skb = skb;
	tx_ring->tx_buffer_info[first].next_to_watch = i;

	return count;
}

static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
			       struct ixgbe_ring *tx_ring,
			       int tx_flags, int count, u32 paylen, u8 hdr_len)
{
	union ixgbe_adv_tx_desc *tx_desc = NULL;
	struct ixgbe_tx_buffer *tx_buffer_info;
	u32 olinfo_status = 0, cmd_type_len = 0;
	unsigned int i;
	u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;

	cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;

	cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;

	if (tx_flags & IXGBE_TX_FLAGS_VLAN)
		cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;

	if (tx_flags & IXGBE_TX_FLAGS_TSO) {
		cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;

		olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
						IXGBE_ADVTXD_POPTS_SHIFT;

		if (tx_flags & IXGBE_TX_FLAGS_IPV4)
			olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
						IXGBE_ADVTXD_POPTS_SHIFT;

	} else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
		olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
						IXGBE_ADVTXD_POPTS_SHIFT;

	olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);

	i = tx_ring->next_to_use;
	while (count--) {
		tx_buffer_info = &tx_ring->tx_buffer_info[i];
		tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
		tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
		tx_desc->read.cmd_type_len =
			cpu_to_le32(cmd_type_len | tx_buffer_info->length);
		tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);

		i++;
		if (i == tx_ring->count)
			i = 0;
	}

	tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);

	/*
	 * Force memory writes to complete before letting h/w
	 * know there are new descriptors to fetch.  (Only
	 * applicable for weak-ordered memory model archs,
	 * such as IA-64).
	 */
	wmb();

	tx_ring->next_to_use = i;
	writel(i, adapter->hw.hw_addr + tx_ring->tail);
}

static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
				 struct ixgbe_ring *tx_ring, int size)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);

	netif_stop_queue(netdev);
	/* Herbert's original patch had:
	 *  smp_mb__after_netif_stop_queue();
	 * but since that doesn't exist yet, just open code it. */
	smp_mb();

	/* We need to check again in a case another CPU has just
	 * made room available. */
	if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
		return -EBUSY;

	/* A reprieve! - use start_queue because it doesn't call schedule */
	netif_wake_queue(netdev);
	++adapter->restart_queue;
	return 0;
}

static int ixgbe_maybe_stop_tx(struct net_device *netdev,
			       struct ixgbe_ring *tx_ring, int size)
{
	if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
		return 0;
	return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
}


static int ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	struct ixgbe_ring *tx_ring;
	unsigned int len = skb->len;
	unsigned int first;
	unsigned int tx_flags = 0;
	u8 hdr_len;
	int tso;
	unsigned int mss = 0;
	int count = 0;
	unsigned int f;
	unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
	len -= skb->data_len;

	tx_ring = adapter->tx_ring;

	if (skb->len <= 0) {
		dev_kfree_skb(skb);
		return NETDEV_TX_OK;
	}
	mss = skb_shinfo(skb)->gso_size;

	if (mss)
		count++;
	else if (skb->ip_summed == CHECKSUM_PARTIAL)
		count++;

	count += TXD_USE_COUNT(len);
	for (f = 0; f < nr_frags; f++)
		count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);

	if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
		adapter->tx_busy++;
		return NETDEV_TX_BUSY;
	}
	if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
		tx_flags |= IXGBE_TX_FLAGS_VLAN;
		tx_flags |= (vlan_tx_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT);
	}

	if (skb->protocol == htons(ETH_P_IP))
		tx_flags |= IXGBE_TX_FLAGS_IPV4;
	first = tx_ring->next_to_use;
	tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
	if (tso < 0) {
		dev_kfree_skb_any(skb);
		return NETDEV_TX_OK;
	}

	if (tso)
		tx_flags |= IXGBE_TX_FLAGS_TSO;
	else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
		 (skb->ip_summed == CHECKSUM_PARTIAL))
		tx_flags |= IXGBE_TX_FLAGS_CSUM;

	ixgbe_tx_queue(adapter, tx_ring, tx_flags,
			   ixgbe_tx_map(adapter, tx_ring, skb, first),
			   skb->len, hdr_len);

	netdev->trans_start = jiffies;

	ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);

	return NETDEV_TX_OK;
}

/**
 * ixgbe_get_stats - Get System Network Statistics
 * @netdev: network interface device structure
 *
 * Returns the address of the device statistics structure.
 * The statistics are actually updated from the timer callback.
 **/
static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);

	/* only return the current stats */
	return &adapter->net_stats;
}

/**
 * ixgbe_set_mac - Change the Ethernet Address of the NIC
 * @netdev: network interface device structure
 * @p: pointer to an address structure
 *
 * Returns 0 on success, negative on failure
 **/
static int ixgbe_set_mac(struct net_device *netdev, void *p)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	struct sockaddr *addr = p;

	if (!is_valid_ether_addr(addr->sa_data))
		return -EADDRNOTAVAIL;

	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
	memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);

	ixgbe_set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV);

	return 0;
}

#ifdef CONFIG_NET_POLL_CONTROLLER
/*
 * Polling 'interrupt' - used by things like netconsole to send skbs
 * without having to re-enable interrupts. It's not called while
 * the interrupt routine is executing.
 */
static void ixgbe_netpoll(struct net_device *netdev)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);

	disable_irq(adapter->pdev->irq);
	adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
	ixgbe_intr(adapter->pdev->irq, netdev);
	adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
	enable_irq(adapter->pdev->irq);
}
#endif

/**
 * ixgbe_probe - Device Initialization Routine
 * @pdev: PCI device information struct
 * @ent: entry in ixgbe_pci_tbl
 *
 * Returns 0 on success, negative on failure
 *
 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
 * The OS initialization, configuring of the adapter private structure,
 * and a hardware reset occur.
 **/
static int __devinit ixgbe_probe(struct pci_dev *pdev,
				 const struct pci_device_id *ent)
{
	struct net_device *netdev;
	struct ixgbe_adapter *adapter = NULL;
	struct ixgbe_hw *hw;
	const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
	unsigned long mmio_start, mmio_len;
	static int cards_found;
	int i, err, pci_using_dac;
	u16 link_status, link_speed, link_width;
	u32 part_num;

	err = pci_enable_device(pdev);
	if (err)
		return err;

	if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK) &&
	    !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) {
		pci_using_dac = 1;
	} else {
		err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
		if (err) {
			err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
			if (err) {
				dev_err(&pdev->dev, "No usable DMA "
					"configuration, aborting\n");
				goto err_dma;
			}
		}
		pci_using_dac = 0;
	}

	err = pci_request_regions(pdev, ixgbe_driver_name);
	if (err) {
		dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
		goto err_pci_reg;
	}

	pci_set_master(pdev);

	netdev = alloc_etherdev(sizeof(struct ixgbe_adapter));
	if (!netdev) {
		err = -ENOMEM;
		goto err_alloc_etherdev;
	}

	SET_NETDEV_DEV(netdev, &pdev->dev);

	pci_set_drvdata(pdev, netdev);
	adapter = netdev_priv(netdev);

	adapter->netdev = netdev;
	adapter->pdev = pdev;
	hw = &adapter->hw;
	hw->back = adapter;
	adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;

	mmio_start = pci_resource_start(pdev, 0);
	mmio_len = pci_resource_len(pdev, 0);

	hw->hw_addr = ioremap(mmio_start, mmio_len);
	if (!hw->hw_addr) {
		err = -EIO;
		goto err_ioremap;
	}

	for (i = 1; i <= 5; i++) {
		if (pci_resource_len(pdev, i) == 0)
			continue;
	}

	netdev->open = &ixgbe_open;
	netdev->stop = &ixgbe_close;
	netdev->hard_start_xmit = &ixgbe_xmit_frame;
	netdev->get_stats = &ixgbe_get_stats;
	netdev->set_multicast_list = &ixgbe_set_multi;
	netdev->set_mac_address = &ixgbe_set_mac;
	netdev->change_mtu = &ixgbe_change_mtu;
	ixgbe_set_ethtool_ops(netdev);
	netdev->tx_timeout = &ixgbe_tx_timeout;
	netdev->watchdog_timeo = 5 * HZ;
	netif_napi_add(netdev, &adapter->napi, ixgbe_clean, 64);
	netdev->vlan_rx_register = ixgbe_vlan_rx_register;
	netdev->vlan_rx_add_vid = ixgbe_vlan_rx_add_vid;
	netdev->vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid;
#ifdef CONFIG_NET_POLL_CONTROLLER
	netdev->poll_controller = ixgbe_netpoll;
#endif
	strcpy(netdev->name, pci_name(pdev));

	netdev->mem_start = mmio_start;
	netdev->mem_end = mmio_start + mmio_len;

	adapter->bd_number = cards_found;

	/* PCI config space info */
	hw->vendor_id = pdev->vendor;
	hw->device_id = pdev->device;
	hw->revision_id = pdev->revision;
	hw->subsystem_vendor_id = pdev->subsystem_vendor;
	hw->subsystem_device_id = pdev->subsystem_device;

	/* Setup hw api */
	memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));

	err = ii->get_invariants(hw);
	if (err)
		goto err_hw_init;

	/* setup the private structure */
	err = ixgbe_sw_init(adapter);
	if (err)
		goto err_sw_init;

	netdev->features = NETIF_F_SG |
			   NETIF_F_HW_CSUM |
			   NETIF_F_HW_VLAN_TX |
			   NETIF_F_HW_VLAN_RX |
			   NETIF_F_HW_VLAN_FILTER;

	netdev->features |= NETIF_F_TSO;

	netdev->features |= NETIF_F_TSO6;
	if (pci_using_dac)
		netdev->features |= NETIF_F_HIGHDMA;


	/* make sure the EEPROM is good */
	if (ixgbe_validate_eeprom_checksum(hw, NULL) < 0) {
		dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
		err = -EIO;
		goto err_eeprom;
	}

	memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
	memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);

	if (ixgbe_validate_mac_addr(netdev->dev_addr)) {
		err = -EIO;
		goto err_eeprom;
	}

	init_timer(&adapter->watchdog_timer);
	adapter->watchdog_timer.function = &ixgbe_watchdog;
	adapter->watchdog_timer.data = (unsigned long)adapter;

	INIT_WORK(&adapter->reset_task, ixgbe_reset_task);

	/* initialize default flow control settings */
	hw->fc.original_type = ixgbe_fc_full;
	hw->fc.type = ixgbe_fc_full;
	hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
	hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
	hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;

	/* Interrupt Throttle Rate */
	adapter->rx_eitr = (1000000 / IXGBE_DEFAULT_ITR_RX_USECS);
	adapter->tx_eitr = (1000000 / IXGBE_DEFAULT_ITR_TX_USECS);

	/* print bus type/speed/width info */
	pci_read_config_word(pdev, IXGBE_PCI_LINK_STATUS, &link_status);
	link_speed = link_status & IXGBE_PCI_LINK_SPEED;
	link_width = link_status & IXGBE_PCI_LINK_WIDTH;
	dev_info(&pdev->dev, "(PCI Express:%s:%s) "
		 "%02x:%02x:%02x:%02x:%02x:%02x\n",
		((link_speed == IXGBE_PCI_LINK_SPEED_5000) ? "5.0Gb/s" :
		 (link_speed == IXGBE_PCI_LINK_SPEED_2500) ? "2.5Gb/s" :
		 "Unknown"),
		((link_width == IXGBE_PCI_LINK_WIDTH_8) ? "Width x8" :
		 (link_width == IXGBE_PCI_LINK_WIDTH_4) ? "Width x4" :
		 (link_width == IXGBE_PCI_LINK_WIDTH_2) ? "Width x2" :
		 (link_width == IXGBE_PCI_LINK_WIDTH_1) ? "Width x1" :
		 "Unknown"),
		netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2],
		netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5]);
	ixgbe_read_part_num(hw, &part_num);
	dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
		 hw->mac.type, hw->phy.type,
		 (part_num >> 8), (part_num & 0xff));

	if (link_width <= IXGBE_PCI_LINK_WIDTH_4) {
		dev_warn(&pdev->dev, "PCI-Express bandwidth available for "
			 "this card is not sufficient for optimal "
			 "performance.\n");
		dev_warn(&pdev->dev, "For optimal performance a x8 "
			 "PCI-Express slot is required.\n");
	}

	/* reset the hardware with the new settings */
	ixgbe_start_hw(hw);

	netif_carrier_off(netdev);
	netif_stop_queue(netdev);

	strcpy(netdev->name, "eth%d");
	err = register_netdev(netdev);
	if (err)
		goto err_register;


	dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
	cards_found++;
	return 0;

err_register:
	ixgbe_release_hw_control(adapter);
err_hw_init:
err_sw_init:
err_eeprom:
	iounmap(hw->hw_addr);
err_ioremap:
	free_netdev(netdev);
err_alloc_etherdev:
	pci_release_regions(pdev);
err_pci_reg:
err_dma:
	pci_disable_device(pdev);
	return err;
}

/**
 * ixgbe_remove - Device Removal Routine
 * @pdev: PCI device information struct
 *
 * ixgbe_remove is called by the PCI subsystem to alert the driver
 * that it should release a PCI device.  The could be caused by a
 * Hot-Plug event, or because the driver is going to be removed from
 * memory.
 **/
static void __devexit ixgbe_remove(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct ixgbe_adapter *adapter = netdev_priv(netdev);

	set_bit(__IXGBE_DOWN, &adapter->state);
	del_timer_sync(&adapter->watchdog_timer);

	flush_scheduled_work();

	unregister_netdev(netdev);

	ixgbe_release_hw_control(adapter);

	kfree(adapter->tx_ring);
	kfree(adapter->rx_ring);

	iounmap(adapter->hw.hw_addr);
	pci_release_regions(pdev);

	free_netdev(netdev);

	pci_disable_device(pdev);
}

/**
 * ixgbe_io_error_detected - called when PCI error is detected
 * @pdev: Pointer to PCI device
 * @state: The current pci connection state
 *
 * This function is called after a PCI bus error affecting
 * this device has been detected.
 */
static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
						pci_channel_state_t state)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct ixgbe_adapter *adapter = netdev->priv;

	netif_device_detach(netdev);

	if (netif_running(netdev))
		ixgbe_down(adapter);
	pci_disable_device(pdev);

	/* Request a slot slot reset. */
	return PCI_ERS_RESULT_NEED_RESET;
}

/**
 * ixgbe_io_slot_reset - called after the pci bus has been reset.
 * @pdev: Pointer to PCI device
 *
 * Restart the card from scratch, as if from a cold-boot.
 */
static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct ixgbe_adapter *adapter = netdev->priv;

	if (pci_enable_device(pdev)) {
		DPRINTK(PROBE, ERR,
			"Cannot re-enable PCI device after reset.\n");
		return PCI_ERS_RESULT_DISCONNECT;
	}
	pci_set_master(pdev);

	pci_enable_wake(pdev, PCI_D3hot, 0);
	pci_enable_wake(pdev, PCI_D3cold, 0);

	ixgbe_reset(adapter);

	return PCI_ERS_RESULT_RECOVERED;
}

/**
 * ixgbe_io_resume - called when traffic can start flowing again.
 * @pdev: Pointer to PCI device
 *
 * This callback is called when the error recovery driver tells us that
 * its OK to resume normal operation.
 */
static void ixgbe_io_resume(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct ixgbe_adapter *adapter = netdev->priv;

	if (netif_running(netdev)) {
		if (ixgbe_up(adapter)) {
			DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
			return;
		}
	}

	netif_device_attach(netdev);

}

static struct pci_error_handlers ixgbe_err_handler = {
	.error_detected = ixgbe_io_error_detected,
	.slot_reset = ixgbe_io_slot_reset,
	.resume = ixgbe_io_resume,
};

static struct pci_driver ixgbe_driver = {
	.name     = ixgbe_driver_name,
	.id_table = ixgbe_pci_tbl,
	.probe    = ixgbe_probe,
	.remove   = __devexit_p(ixgbe_remove),
#ifdef CONFIG_PM
	.suspend  = ixgbe_suspend,
	.resume   = ixgbe_resume,
#endif
	.shutdown = ixgbe_shutdown,
	.err_handler = &ixgbe_err_handler
};

/**
 * ixgbe_init_module - Driver Registration Routine
 *
 * ixgbe_init_module is the first routine called when the driver is
 * loaded. All it does is register with the PCI subsystem.
 **/
static int __init ixgbe_init_module(void)
{
	int ret;
	printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
	       ixgbe_driver_string, ixgbe_driver_version);

	printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);

	ret = pci_register_driver(&ixgbe_driver);
	return ret;
}
module_init(ixgbe_init_module);

/**
 * ixgbe_exit_module - Driver Exit Cleanup Routine
 *
 * ixgbe_exit_module is called just before the driver is removed
 * from memory.
 **/
static void __exit ixgbe_exit_module(void)
{
	pci_unregister_driver(&ixgbe_driver);
}
module_exit(ixgbe_exit_module);

/* ixgbe_main.c */