summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
blob: 9b778b34b67ef96baaebdbd311573a2df820df70 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright(c) 2007 Atheros Corporation. All rights reserved.
 *
 * Derived from Intel e1000 driver
 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
 */

#include "atl1e.h"

char atl1e_driver_name[] = "ATL1E";
#define PCI_DEVICE_ID_ATTANSIC_L1E      0x1026
/*
 * atl1e_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 const struct pci_device_id atl1e_pci_tbl[] = {
	{PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)},
	{PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, 0x1066)},
	/* required last entry */
	{ 0 }
};
MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl);

MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>");
MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
MODULE_LICENSE("GPL");

static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);

static const u16
atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
{
	{REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD},
	{REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD},
	{REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD},
	{REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD}
};

static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] =
{
	REG_RXF0_BASE_ADDR_HI,
	REG_RXF1_BASE_ADDR_HI,
	REG_RXF2_BASE_ADDR_HI,
	REG_RXF3_BASE_ADDR_HI
};

static const u16
atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
{
	{REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO},
	{REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO},
	{REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO},
	{REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO}
};

static const u16
atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
{
	{REG_HOST_RXF0_MB0_LO,  REG_HOST_RXF0_MB1_LO},
	{REG_HOST_RXF1_MB0_LO,  REG_HOST_RXF1_MB1_LO},
	{REG_HOST_RXF2_MB0_LO,  REG_HOST_RXF2_MB1_LO},
	{REG_HOST_RXF3_MB0_LO,  REG_HOST_RXF3_MB1_LO}
};

static const u16 atl1e_pay_load_size[] = {
	128, 256, 512, 1024, 2048, 4096,
};

/**
 * atl1e_irq_enable - Enable default interrupt generation settings
 * @adapter: board private structure
 */
static inline void atl1e_irq_enable(struct atl1e_adapter *adapter)
{
	if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
		AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
		AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
		AT_WRITE_FLUSH(&adapter->hw);
	}
}

/**
 * atl1e_irq_disable - Mask off interrupt generation on the NIC
 * @adapter: board private structure
 */
static inline void atl1e_irq_disable(struct atl1e_adapter *adapter)
{
	atomic_inc(&adapter->irq_sem);
	AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
	AT_WRITE_FLUSH(&adapter->hw);
	synchronize_irq(adapter->pdev->irq);
}

/**
 * atl1e_irq_reset - reset interrupt confiure on the NIC
 * @adapter: board private structure
 */
static inline void atl1e_irq_reset(struct atl1e_adapter *adapter)
{
	atomic_set(&adapter->irq_sem, 0);
	AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
	AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
	AT_WRITE_FLUSH(&adapter->hw);
}

/**
 * atl1e_phy_config - Timer Call-back
 * @t: timer list containing pointer to netdev cast into an unsigned long
 */
static void atl1e_phy_config(struct timer_list *t)
{
	struct atl1e_adapter *adapter = from_timer(adapter, t,
						   phy_config_timer);
	struct atl1e_hw *hw = &adapter->hw;
	unsigned long flags;

	spin_lock_irqsave(&adapter->mdio_lock, flags);
	atl1e_restart_autoneg(hw);
	spin_unlock_irqrestore(&adapter->mdio_lock, flags);
}

void atl1e_reinit_locked(struct atl1e_adapter *adapter)
{
	while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
		msleep(1);
	atl1e_down(adapter);
	atl1e_up(adapter);
	clear_bit(__AT_RESETTING, &adapter->flags);
}

static void atl1e_reset_task(struct work_struct *work)
{
	struct atl1e_adapter *adapter;
	adapter = container_of(work, struct atl1e_adapter, reset_task);

	atl1e_reinit_locked(adapter);
}

static int atl1e_check_link(struct atl1e_adapter *adapter)
{
	struct atl1e_hw *hw = &adapter->hw;
	struct net_device *netdev = adapter->netdev;
	int err = 0;
	u16 speed, duplex, phy_data;

	/* MII_BMSR must read twice */
	atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
	atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
	if ((phy_data & BMSR_LSTATUS) == 0) {
		/* link down */
		if (netif_carrier_ok(netdev)) { /* old link state: Up */
			u32 value;
			/* disable rx */
			value = AT_READ_REG(hw, REG_MAC_CTRL);
			value &= ~MAC_CTRL_RX_EN;
			AT_WRITE_REG(hw, REG_MAC_CTRL, value);
			adapter->link_speed = SPEED_0;
			netif_carrier_off(netdev);
			netif_stop_queue(netdev);
		}
	} else {
		/* Link Up */
		err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
		if (unlikely(err))
			return err;

		/* link result is our setting */
		if (adapter->link_speed != speed ||
		    adapter->link_duplex != duplex) {
			adapter->link_speed  = speed;
			adapter->link_duplex = duplex;
			atl1e_setup_mac_ctrl(adapter);
			netdev_info(netdev,
				    "NIC Link is Up <%d Mbps %s Duplex>\n",
				    adapter->link_speed,
				    adapter->link_duplex == FULL_DUPLEX ?
				    "Full" : "Half");
		}

		if (!netif_carrier_ok(netdev)) {
			/* Link down -> Up */
			netif_carrier_on(netdev);
			netif_wake_queue(netdev);
		}
	}
	return 0;
}

/**
 * atl1e_link_chg_task - deal with link change event Out of interrupt context
 * @work: work struct with driver info
 */
static void atl1e_link_chg_task(struct work_struct *work)
{
	struct atl1e_adapter *adapter;
	unsigned long flags;

	adapter = container_of(work, struct atl1e_adapter, link_chg_task);
	spin_lock_irqsave(&adapter->mdio_lock, flags);
	atl1e_check_link(adapter);
	spin_unlock_irqrestore(&adapter->mdio_lock, flags);
}

static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	u16 phy_data = 0;
	u16 link_up = 0;

	spin_lock(&adapter->mdio_lock);
	atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
	atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
	spin_unlock(&adapter->mdio_lock);
	link_up = phy_data & BMSR_LSTATUS;
	/* notify upper layer link down ASAP */
	if (!link_up) {
		if (netif_carrier_ok(netdev)) {
			/* old link state: Up */
			netdev_info(netdev, "NIC Link is Down\n");
			adapter->link_speed = SPEED_0;
			netif_stop_queue(netdev);
		}
	}
	schedule_work(&adapter->link_chg_task);
}

static void atl1e_del_timer(struct atl1e_adapter *adapter)
{
	del_timer_sync(&adapter->phy_config_timer);
}

static void atl1e_cancel_work(struct atl1e_adapter *adapter)
{
	cancel_work_sync(&adapter->reset_task);
	cancel_work_sync(&adapter->link_chg_task);
}

/**
 * atl1e_tx_timeout - Respond to a Tx Hang
 * @netdev: network interface device structure
 * @txqueue: the index of the hanging queue
 */
static void atl1e_tx_timeout(struct net_device *netdev, unsigned int txqueue)
{
	struct atl1e_adapter *adapter = netdev_priv(netdev);

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

/**
 * atl1e_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 atl1e_set_multi(struct net_device *netdev)
{
	struct atl1e_adapter *adapter = netdev_priv(netdev);
	struct atl1e_hw *hw = &adapter->hw;
	struct netdev_hw_addr *ha;
	u32 mac_ctrl_data = 0;
	u32 hash_value;

	/* Check for Promiscuous and All Multicast modes */
	mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);

	if (netdev->flags & IFF_PROMISC) {
		mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
	} else if (netdev->flags & IFF_ALLMULTI) {
		mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
		mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
	} else {
		mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
	}

	AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);

	/* clear the old settings from the multicast hash table */
	AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
	AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);

	/* comoute mc addresses' hash value ,and put it into hash table */
	netdev_for_each_mc_addr(ha, netdev) {
		hash_value = atl1e_hash_mc_addr(hw, ha->addr);
		atl1e_hash_set(hw, hash_value);
	}
}

static void __atl1e_rx_mode(netdev_features_t features, u32 *mac_ctrl_data)
{

	if (features & NETIF_F_RXALL) {
		/* enable RX of ALL frames */
		*mac_ctrl_data |= MAC_CTRL_DBG;
	} else {
		/* disable RX of ALL frames */
		*mac_ctrl_data &= ~MAC_CTRL_DBG;
	}
}

static void atl1e_rx_mode(struct net_device *netdev,
	netdev_features_t features)
{
	struct atl1e_adapter *adapter = netdev_priv(netdev);
	u32 mac_ctrl_data = 0;

	netdev_dbg(adapter->netdev, "%s\n", __func__);

	atl1e_irq_disable(adapter);
	mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
	__atl1e_rx_mode(features, &mac_ctrl_data);
	AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
	atl1e_irq_enable(adapter);
}


static void __atl1e_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
{
	if (features & NETIF_F_HW_VLAN_CTAG_RX) {
		/* enable VLAN tag insert/strip */
		*mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
	} else {
		/* disable VLAN tag insert/strip */
		*mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
	}
}

static void atl1e_vlan_mode(struct net_device *netdev,
	netdev_features_t features)
{
	struct atl1e_adapter *adapter = netdev_priv(netdev);
	u32 mac_ctrl_data = 0;

	netdev_dbg(adapter->netdev, "%s\n", __func__);

	atl1e_irq_disable(adapter);
	mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
	__atl1e_vlan_mode(features, &mac_ctrl_data);
	AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
	atl1e_irq_enable(adapter);
}

static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
{
	netdev_dbg(adapter->netdev, "%s\n", __func__);
	atl1e_vlan_mode(adapter->netdev, adapter->netdev->features);
}

/**
 * atl1e_set_mac_addr - 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 atl1e_set_mac_addr(struct net_device *netdev, void *p)
{
	struct atl1e_adapter *adapter = netdev_priv(netdev);
	struct sockaddr *addr = p;

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

	if (netif_running(netdev))
		return -EBUSY;

	eth_hw_addr_set(netdev, addr->sa_data);
	memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);

	atl1e_hw_set_mac_addr(&adapter->hw);

	return 0;
}

static netdev_features_t atl1e_fix_features(struct net_device *netdev,
	netdev_features_t features)
{
	/*
	 * Since there is no support for separate rx/tx vlan accel
	 * enable/disable make sure tx flag is always in same state as rx.
	 */
	if (features & NETIF_F_HW_VLAN_CTAG_RX)
		features |= NETIF_F_HW_VLAN_CTAG_TX;
	else
		features &= ~NETIF_F_HW_VLAN_CTAG_TX;

	return features;
}

static int atl1e_set_features(struct net_device *netdev,
	netdev_features_t features)
{
	netdev_features_t changed = netdev->features ^ features;

	if (changed & NETIF_F_HW_VLAN_CTAG_RX)
		atl1e_vlan_mode(netdev, features);

	if (changed & NETIF_F_RXALL)
		atl1e_rx_mode(netdev, features);


	return 0;
}

/**
 * atl1e_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 atl1e_change_mtu(struct net_device *netdev, int new_mtu)
{
	struct atl1e_adapter *adapter = netdev_priv(netdev);
	int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;

	/* set MTU */
	if (netif_running(netdev)) {
		while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
			msleep(1);
		WRITE_ONCE(netdev->mtu, new_mtu);
		adapter->hw.max_frame_size = new_mtu;
		adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
		atl1e_down(adapter);
		atl1e_up(adapter);
		clear_bit(__AT_RESETTING, &adapter->flags);
	}
	return 0;
}

/*
 *  caller should hold mdio_lock
 */
static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
{
	struct atl1e_adapter *adapter = netdev_priv(netdev);
	u16 result;

	atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
	return result;
}

static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
			     int reg_num, int val)
{
	struct atl1e_adapter *adapter = netdev_priv(netdev);

	if (atl1e_write_phy_reg(&adapter->hw,
				reg_num & MDIO_REG_ADDR_MASK, val))
		netdev_err(netdev, "write phy register failed\n");
}

static int atl1e_mii_ioctl(struct net_device *netdev,
			   struct ifreq *ifr, int cmd)
{
	struct atl1e_adapter *adapter = netdev_priv(netdev);
	struct mii_ioctl_data *data = if_mii(ifr);
	unsigned long flags;
	int retval = 0;

	if (!netif_running(netdev))
		return -EINVAL;

	spin_lock_irqsave(&adapter->mdio_lock, flags);
	switch (cmd) {
	case SIOCGMIIPHY:
		data->phy_id = 0;
		break;

	case SIOCGMIIREG:
		if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
				    &data->val_out)) {
			retval = -EIO;
			goto out;
		}
		break;

	case SIOCSMIIREG:
		if (data->reg_num & ~(0x1F)) {
			retval = -EFAULT;
			goto out;
		}

		netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
			   data->reg_num, data->val_in);
		if (atl1e_write_phy_reg(&adapter->hw,
				     data->reg_num, data->val_in)) {
			retval = -EIO;
			goto out;
		}
		break;

	default:
		retval = -EOPNOTSUPP;
		break;
	}
out:
	spin_unlock_irqrestore(&adapter->mdio_lock, flags);
	return retval;

}

static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
{
	switch (cmd) {
	case SIOCGMIIPHY:
	case SIOCGMIIREG:
	case SIOCSMIIREG:
		return atl1e_mii_ioctl(netdev, ifr, cmd);
	default:
		return -EOPNOTSUPP;
	}
}

static void atl1e_setup_pcicmd(struct pci_dev *pdev)
{
	u16 cmd;

	pci_read_config_word(pdev, PCI_COMMAND, &cmd);
	cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
	cmd |=  (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
	pci_write_config_word(pdev, PCI_COMMAND, cmd);

	/*
	 * some motherboards BIOS(PXE/EFI) driver may set PME
	 * while they transfer control to OS (Windows/Linux)
	 * so we should clear this bit before NIC work normally
	 */
	pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
	msleep(1);
}

/**
 * atl1e_alloc_queues - Allocate memory for all rings
 * @adapter: board private structure to initialize
 *
 */
static int atl1e_alloc_queues(struct atl1e_adapter *adapter)
{
	return 0;
}

/**
 * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
 * @adapter: board private structure to initialize
 *
 * atl1e_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 atl1e_sw_init(struct atl1e_adapter *adapter)
{
	struct atl1e_hw *hw   = &adapter->hw;
	struct pci_dev	*pdev = adapter->pdev;
	u32 phy_status_data = 0;

	adapter->wol = 0;
	adapter->link_speed = SPEED_0;   /* hardware init */
	adapter->link_duplex = FULL_DUPLEX;
	adapter->num_rx_queues = 1;

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

	pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);

	phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
	/* nic type */
	if (hw->revision_id >= 0xF0) {
		hw->nic_type = athr_l2e_revB;
	} else {
		if (phy_status_data & PHY_STATUS_100M)
			hw->nic_type = athr_l1e;
		else
			hw->nic_type = athr_l2e_revA;
	}

	phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);

	if (phy_status_data & PHY_STATUS_EMI_CA)
		hw->emi_ca = true;
	else
		hw->emi_ca = false;

	hw->phy_configured = false;
	hw->preamble_len = 7;
	hw->max_frame_size = adapter->netdev->mtu;
	hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
				VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;

	hw->rrs_type = atl1e_rrs_disable;
	hw->indirect_tab = 0;
	hw->base_cpu = 0;

	/* need confirm */

	hw->ict = 50000;                 /* 100ms */
	hw->smb_timer = 200000;          /* 200ms  */
	hw->tpd_burst = 5;
	hw->rrd_thresh = 1;
	hw->tpd_thresh = adapter->tx_ring.count / 2;
	hw->rx_count_down = 4;  /* 2us resolution */
	hw->tx_count_down = hw->imt * 4 / 3;
	hw->dmar_block = atl1e_dma_req_1024;
	hw->dmaw_block = atl1e_dma_req_1024;
	hw->dmar_dly_cnt = 15;
	hw->dmaw_dly_cnt = 4;

	if (atl1e_alloc_queues(adapter)) {
		netdev_err(adapter->netdev, "Unable to allocate memory for queues\n");
		return -ENOMEM;
	}

	atomic_set(&adapter->irq_sem, 1);
	spin_lock_init(&adapter->mdio_lock);

	set_bit(__AT_DOWN, &adapter->flags);

	return 0;
}

/**
 * atl1e_clean_tx_ring - Free Tx-skb
 * @adapter: board private structure
 */
static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
{
	struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
	struct atl1e_tx_buffer *tx_buffer = NULL;
	struct pci_dev *pdev = adapter->pdev;
	u16 index, ring_count;

	if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
		return;

	ring_count = tx_ring->count;
	/* first unmmap dma */
	for (index = 0; index < ring_count; index++) {
		tx_buffer = &tx_ring->tx_buffer[index];
		if (tx_buffer->dma) {
			if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
				dma_unmap_single(&pdev->dev, tx_buffer->dma,
						 tx_buffer->length,
						 DMA_TO_DEVICE);
			else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
				dma_unmap_page(&pdev->dev, tx_buffer->dma,
					       tx_buffer->length,
					       DMA_TO_DEVICE);
			tx_buffer->dma = 0;
		}
	}
	/* second free skb */
	for (index = 0; index < ring_count; index++) {
		tx_buffer = &tx_ring->tx_buffer[index];
		if (tx_buffer->skb) {
			dev_kfree_skb_any(tx_buffer->skb);
			tx_buffer->skb = NULL;
		}
	}
	/* Zero out Tx-buffers */
	memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
				ring_count);
	memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
				ring_count);
}

/**
 * atl1e_clean_rx_ring - Free rx-reservation skbs
 * @adapter: board private structure
 */
static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
{
	struct atl1e_rx_ring *rx_ring =
		&adapter->rx_ring;
	struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
	u16 i, j;


	if (adapter->ring_vir_addr == NULL)
		return;
	/* Zero out the descriptor ring */
	for (i = 0; i < adapter->num_rx_queues; i++) {
		for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
			if (rx_page_desc[i].rx_page[j].addr != NULL) {
				memset(rx_page_desc[i].rx_page[j].addr, 0,
						rx_ring->real_page_size);
			}
		}
	}
}

static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
{
	*ring_size = ((u32)(adapter->tx_ring.count *
		     sizeof(struct atl1e_tpd_desc) + 7
			/* tx ring, qword align */
		     + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
			adapter->num_rx_queues + 31
			/* rx ring,  32 bytes align */
		     + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
			sizeof(u32) + 3));
			/* tx, rx cmd, dword align   */
}

static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
{
	struct atl1e_rx_ring *rx_ring = NULL;

	rx_ring = &adapter->rx_ring;

	rx_ring->real_page_size = adapter->rx_ring.page_size
				 + adapter->hw.max_frame_size
				 + ETH_HLEN + VLAN_HLEN
				 + ETH_FCS_LEN;
	rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
	atl1e_cal_ring_size(adapter, &adapter->ring_size);

	adapter->ring_vir_addr = NULL;
	adapter->rx_ring.desc = NULL;
	rwlock_init(&adapter->tx_ring.tx_lock);
}

/*
 * Read / Write Ptr Initialize:
 */
static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
{
	struct atl1e_tx_ring *tx_ring = NULL;
	struct atl1e_rx_ring *rx_ring = NULL;
	struct atl1e_rx_page_desc *rx_page_desc = NULL;
	int i, j;

	tx_ring = &adapter->tx_ring;
	rx_ring = &adapter->rx_ring;
	rx_page_desc = rx_ring->rx_page_desc;

	tx_ring->next_to_use = 0;
	atomic_set(&tx_ring->next_to_clean, 0);

	for (i = 0; i < adapter->num_rx_queues; i++) {
		rx_page_desc[i].rx_using  = 0;
		rx_page_desc[i].rx_nxseq = 0;
		for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
			*rx_page_desc[i].rx_page[j].write_offset_addr = 0;
			rx_page_desc[i].rx_page[j].read_offset = 0;
		}
	}
}

/**
 * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
 * @adapter: board private structure
 *
 * Free all transmit software resources
 */
static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
{
	struct pci_dev *pdev = adapter->pdev;

	atl1e_clean_tx_ring(adapter);
	atl1e_clean_rx_ring(adapter);

	if (adapter->ring_vir_addr) {
		dma_free_coherent(&pdev->dev, adapter->ring_size,
				  adapter->ring_vir_addr, adapter->ring_dma);
		adapter->ring_vir_addr = NULL;
	}

	if (adapter->tx_ring.tx_buffer) {
		kfree(adapter->tx_ring.tx_buffer);
		adapter->tx_ring.tx_buffer = NULL;
	}
}

/**
 * atl1e_setup_ring_resources - allocate Tx / RX descriptor resources
 * @adapter: board private structure
 *
 * Return 0 on success, negative on failure
 */
static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
{
	struct pci_dev *pdev = adapter->pdev;
	struct atl1e_tx_ring *tx_ring;
	struct atl1e_rx_ring *rx_ring;
	struct atl1e_rx_page_desc  *rx_page_desc;
	int size, i, j;
	u32 offset = 0;
	int err = 0;

	if (adapter->ring_vir_addr != NULL)
		return 0; /* alloced already */

	tx_ring = &adapter->tx_ring;
	rx_ring = &adapter->rx_ring;

	/* real ring DMA buffer */

	size = adapter->ring_size;
	adapter->ring_vir_addr = dma_alloc_coherent(&pdev->dev,
						    adapter->ring_size,
						    &adapter->ring_dma, GFP_KERNEL);
	if (adapter->ring_vir_addr == NULL) {
		netdev_err(adapter->netdev,
			   "dma_alloc_coherent failed, size = D%d\n", size);
		return -ENOMEM;
	}

	rx_page_desc = rx_ring->rx_page_desc;

	/* Init TPD Ring */
	tx_ring->dma = roundup(adapter->ring_dma, 8);
	offset = tx_ring->dma - adapter->ring_dma;
	tx_ring->desc = adapter->ring_vir_addr + offset;
	size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
	tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
	if (tx_ring->tx_buffer == NULL) {
		err = -ENOMEM;
		goto failed;
	}

	/* Init RXF-Pages */
	offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
	offset = roundup(offset, 32);

	for (i = 0; i < adapter->num_rx_queues; i++) {
		for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
			rx_page_desc[i].rx_page[j].dma =
				adapter->ring_dma + offset;
			rx_page_desc[i].rx_page[j].addr =
				adapter->ring_vir_addr + offset;
			offset += rx_ring->real_page_size;
		}
	}

	/* Init CMB dma address */
	tx_ring->cmb_dma = adapter->ring_dma + offset;
	tx_ring->cmb = adapter->ring_vir_addr + offset;
	offset += sizeof(u32);

	for (i = 0; i < adapter->num_rx_queues; i++) {
		for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
			rx_page_desc[i].rx_page[j].write_offset_dma =
				adapter->ring_dma + offset;
			rx_page_desc[i].rx_page[j].write_offset_addr =
				adapter->ring_vir_addr + offset;
			offset += sizeof(u32);
		}
	}

	if (unlikely(offset > adapter->ring_size)) {
		netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
			   offset, adapter->ring_size);
		err = -1;
		goto free_buffer;
	}

	return 0;
free_buffer:
	kfree(tx_ring->tx_buffer);
	tx_ring->tx_buffer = NULL;
failed:
	if (adapter->ring_vir_addr != NULL) {
		dma_free_coherent(&pdev->dev, adapter->ring_size,
				  adapter->ring_vir_addr, adapter->ring_dma);
		adapter->ring_vir_addr = NULL;
	}
	return err;
}

static inline void atl1e_configure_des_ring(struct atl1e_adapter *adapter)
{

	struct atl1e_hw *hw = &adapter->hw;
	struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
	struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
	struct atl1e_rx_page_desc *rx_page_desc = NULL;
	int i, j;

	AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
			(u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
	AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
			(u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
	AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
	AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
			(u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));

	rx_page_desc = rx_ring->rx_page_desc;
	/* RXF Page Physical address / Page Length */
	for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
		AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
				 (u32)((adapter->ring_dma &
				 AT_DMA_HI_ADDR_MASK) >> 32));
		for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
			u32 page_phy_addr;
			u32 offset_phy_addr;

			page_phy_addr = rx_page_desc[i].rx_page[j].dma;
			offset_phy_addr =
				   rx_page_desc[i].rx_page[j].write_offset_dma;

			AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
					page_phy_addr & AT_DMA_LO_ADDR_MASK);
			AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
					offset_phy_addr & AT_DMA_LO_ADDR_MASK);
			AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
		}
	}
	/* Page Length */
	AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
	/* Load all of base address above */
	AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
}

static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
{
	struct atl1e_hw *hw = &adapter->hw;
	u32 dev_ctrl_data = 0;
	u32 max_pay_load = 0;
	u32 jumbo_thresh = 0;
	u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */

	/* configure TXQ param */
	if (hw->nic_type != athr_l2e_revB) {
		extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
		if (hw->max_frame_size <= 1500) {
			jumbo_thresh = hw->max_frame_size + extra_size;
		} else if (hw->max_frame_size < 6*1024) {
			jumbo_thresh =
				(hw->max_frame_size + extra_size) * 2 / 3;
		} else {
			jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
		}
		AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
	}

	dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);

	max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
			DEVICE_CTRL_MAX_PAYLOAD_MASK;

	hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);

	max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
			DEVICE_CTRL_MAX_RREQ_SZ_MASK;
	hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);

	if (hw->nic_type != athr_l2e_revB)
		AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
			      atl1e_pay_load_size[hw->dmar_block]);
	/* enable TXQ */
	AT_WRITE_REGW(hw, REG_TXQ_CTRL,
			(((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
			 << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
			| TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
}

static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
{
	struct atl1e_hw *hw = &adapter->hw;
	u32 rxf_len  = 0;
	u32 rxf_low  = 0;
	u32 rxf_high = 0;
	u32 rxf_thresh_data = 0;
	u32 rxq_ctrl_data = 0;

	if (hw->nic_type != athr_l2e_revB) {
		AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
			      (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
			      RXQ_JMBOSZ_TH_SHIFT |
			      (1 & RXQ_JMBO_LKAH_MASK) <<
			      RXQ_JMBO_LKAH_SHIFT));

		rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
		rxf_high = rxf_len * 4 / 5;
		rxf_low  = rxf_len / 5;
		rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
				  << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
				  ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
				  << RXQ_RXF_PAUSE_TH_LO_SHIFT);

		AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
	}

	/* RRS */
	AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
	AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);

	if (hw->rrs_type & atl1e_rrs_ipv4)
		rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;

	if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
		rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;

	if (hw->rrs_type & atl1e_rrs_ipv6)
		rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;

	if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
		rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;

	if (hw->rrs_type != atl1e_rrs_disable)
		rxq_ctrl_data |=
			(RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);

	rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
			 RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;

	AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
}

static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
{
	struct atl1e_hw *hw = &adapter->hw;
	u32 dma_ctrl_data = 0;

	dma_ctrl_data = DMA_CTRL_RXCMB_EN;
	dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
		<< DMA_CTRL_DMAR_BURST_LEN_SHIFT;
	dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
		<< DMA_CTRL_DMAW_BURST_LEN_SHIFT;
	dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
	dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
		<< DMA_CTRL_DMAR_DLY_CNT_SHIFT;
	dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
		<< DMA_CTRL_DMAW_DLY_CNT_SHIFT;

	AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
}

static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
{
	u32 value;
	struct atl1e_hw *hw = &adapter->hw;
	struct net_device *netdev = adapter->netdev;

	/* Config MAC CTRL Register */
	value = MAC_CTRL_TX_EN |
		MAC_CTRL_RX_EN ;

	if (FULL_DUPLEX == adapter->link_duplex)
		value |= MAC_CTRL_DUPLX;

	value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
			  MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
			  MAC_CTRL_SPEED_SHIFT);
	value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);

	value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
	value |= (((u32)adapter->hw.preamble_len &
		  MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);

	__atl1e_vlan_mode(netdev->features, &value);

	value |= MAC_CTRL_BC_EN;
	if (netdev->flags & IFF_PROMISC)
		value |= MAC_CTRL_PROMIS_EN;
	if (netdev->flags & IFF_ALLMULTI)
		value |= MAC_CTRL_MC_ALL_EN;
	if (netdev->features & NETIF_F_RXALL)
		value |= MAC_CTRL_DBG;
	AT_WRITE_REG(hw, REG_MAC_CTRL, value);
}

/**
 * atl1e_configure - Configure Transmit&Receive Unit after Reset
 * @adapter: board private structure
 *
 * Configure the Tx /Rx unit of the MAC after a reset.
 */
static int atl1e_configure(struct atl1e_adapter *adapter)
{
	struct atl1e_hw *hw = &adapter->hw;

	u32 intr_status_data = 0;

	/* clear interrupt status */
	AT_WRITE_REG(hw, REG_ISR, ~0);

	/* 1. set MAC Address */
	atl1e_hw_set_mac_addr(hw);

	/* 2. Init the Multicast HASH table done by set_muti */

	/* 3. Clear any WOL status */
	AT_WRITE_REG(hw, REG_WOL_CTRL, 0);

	/* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
	 *    TPD Ring/SMB/RXF0 Page CMBs, they use the same
	 *    High 32bits memory */
	atl1e_configure_des_ring(adapter);

	/* 5. set Interrupt Moderator Timer */
	AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
	AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
	AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
			MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);

	/* 6. rx/tx threshold to trig interrupt */
	AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
	AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
	AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
	AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);

	/* 7. set Interrupt Clear Timer */
	AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);

	/* 8. set MTU */
	AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
			VLAN_HLEN + ETH_FCS_LEN);

	/* 9. config TXQ early tx threshold */
	atl1e_configure_tx(adapter);

	/* 10. config RXQ */
	atl1e_configure_rx(adapter);

	/* 11. config  DMA Engine */
	atl1e_configure_dma(adapter);

	/* 12. smb timer to trig interrupt */
	AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);

	intr_status_data = AT_READ_REG(hw, REG_ISR);
	if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
		netdev_err(adapter->netdev,
			   "atl1e_configure failed, PCIE phy link down\n");
		return -1;
	}

	AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
	return 0;
}

/**
 * atl1e_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 *atl1e_get_stats(struct net_device *netdev)
{
	struct atl1e_adapter *adapter = netdev_priv(netdev);
	struct atl1e_hw_stats  *hw_stats = &adapter->hw_stats;
	struct net_device_stats *net_stats = &netdev->stats;

	net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
	net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
	net_stats->multicast  = hw_stats->rx_mcast;
	net_stats->collisions = hw_stats->tx_1_col +
				hw_stats->tx_2_col +
				hw_stats->tx_late_col +
				hw_stats->tx_abort_col;

	net_stats->rx_errors  = hw_stats->rx_frag +
				hw_stats->rx_fcs_err +
				hw_stats->rx_len_err +
				hw_stats->rx_sz_ov +
				hw_stats->rx_rrd_ov +
				hw_stats->rx_align_err +
				hw_stats->rx_rxf_ov;

	net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
	net_stats->rx_length_errors = hw_stats->rx_len_err;
	net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
	net_stats->rx_frame_errors  = hw_stats->rx_align_err;
	net_stats->rx_dropped       = hw_stats->rx_rrd_ov;

	net_stats->tx_errors = hw_stats->tx_late_col +
			       hw_stats->tx_abort_col +
			       hw_stats->tx_underrun +
			       hw_stats->tx_trunc;

	net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
	net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
	net_stats->tx_window_errors  = hw_stats->tx_late_col;

	net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
	net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;

	return net_stats;
}

static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
{
	u16 hw_reg_addr = 0;
	unsigned long *stats_item = NULL;

	/* update rx status */
	hw_reg_addr = REG_MAC_RX_STATUS_BIN;
	stats_item  = &adapter->hw_stats.rx_ok;
	while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
		*stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
		stats_item++;
		hw_reg_addr += 4;
	}
	/* update tx status */
	hw_reg_addr = REG_MAC_TX_STATUS_BIN;
	stats_item  = &adapter->hw_stats.tx_ok;
	while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
		*stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
		stats_item++;
		hw_reg_addr += 4;
	}
}

static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
{
	u16 phy_data;

	spin_lock(&adapter->mdio_lock);
	atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
	spin_unlock(&adapter->mdio_lock);
}

static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
{
	struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
	struct atl1e_tx_buffer *tx_buffer = NULL;
	u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
	u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);

	while (next_to_clean != hw_next_to_clean) {
		tx_buffer = &tx_ring->tx_buffer[next_to_clean];
		if (tx_buffer->dma) {
			if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
				dma_unmap_single(&adapter->pdev->dev,
						 tx_buffer->dma,
						 tx_buffer->length,
						 DMA_TO_DEVICE);
			else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
				dma_unmap_page(&adapter->pdev->dev,
					       tx_buffer->dma,
					       tx_buffer->length,
					       DMA_TO_DEVICE);
			tx_buffer->dma = 0;
		}

		if (tx_buffer->skb) {
			dev_consume_skb_irq(tx_buffer->skb);
			tx_buffer->skb = NULL;
		}

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

	atomic_set(&tx_ring->next_to_clean, next_to_clean);

	if (netif_queue_stopped(adapter->netdev) &&
			netif_carrier_ok(adapter->netdev)) {
		netif_wake_queue(adapter->netdev);
	}

	return true;
}

/**
 * atl1e_intr - Interrupt Handler
 * @irq: interrupt number
 * @data: pointer to a network interface device structure
 */
static irqreturn_t atl1e_intr(int irq, void *data)
{
	struct net_device *netdev  = data;
	struct atl1e_adapter *adapter = netdev_priv(netdev);
	struct atl1e_hw *hw = &adapter->hw;
	int max_ints = AT_MAX_INT_WORK;
	int handled = IRQ_NONE;
	u32 status;

	do {
		status = AT_READ_REG(hw, REG_ISR);
		if ((status & IMR_NORMAL_MASK) == 0 ||
				(status & ISR_DIS_INT) != 0) {
			if (max_ints != AT_MAX_INT_WORK)
				handled = IRQ_HANDLED;
			break;
		}
		/* link event */
		if (status & ISR_GPHY)
			atl1e_clear_phy_int(adapter);
		/* Ack ISR */
		AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);

		handled = IRQ_HANDLED;
		/* check if PCIE PHY Link down */
		if (status & ISR_PHY_LINKDOWN) {
			netdev_err(adapter->netdev,
				   "pcie phy linkdown %x\n", status);
			if (netif_running(adapter->netdev)) {
				/* reset MAC */
				atl1e_irq_reset(adapter);
				schedule_work(&adapter->reset_task);
				break;
			}
		}

		/* check if DMA read/write error */
		if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
			netdev_err(adapter->netdev,
				   "PCIE DMA RW error (status = 0x%x)\n",
				   status);
			atl1e_irq_reset(adapter);
			schedule_work(&adapter->reset_task);
			break;
		}

		if (status & ISR_SMB)
			atl1e_update_hw_stats(adapter);

		/* link event */
		if (status & (ISR_GPHY | ISR_MANUAL)) {
			netdev->stats.tx_carrier_errors++;
			atl1e_link_chg_event(adapter);
			break;
		}

		/* transmit event */
		if (status & ISR_TX_EVENT)
			atl1e_clean_tx_irq(adapter);

		if (status & ISR_RX_EVENT) {
			/*
			 * disable rx interrupts, without
			 * the synchronize_irq bit
			 */
			AT_WRITE_REG(hw, REG_IMR,
				     IMR_NORMAL_MASK & ~ISR_RX_EVENT);
			AT_WRITE_FLUSH(hw);
			if (likely(napi_schedule_prep(
				   &adapter->napi)))
				__napi_schedule(&adapter->napi);
		}
	} while (--max_ints > 0);
	/* re-enable Interrupt*/
	AT_WRITE_REG(&adapter->hw, REG_ISR, 0);

	return handled;
}

static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
		  struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
{
	u8 *packet = (u8 *)(prrs + 1);
	struct iphdr *iph;
	u16 head_len = ETH_HLEN;
	u16 pkt_flags;
	u16 err_flags;

	skb_checksum_none_assert(skb);
	pkt_flags = prrs->pkt_flag;
	err_flags = prrs->err_flag;
	if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
		((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
		if (pkt_flags & RRS_IS_IPV4) {
			if (pkt_flags & RRS_IS_802_3)
				head_len += 8;
			iph = (struct iphdr *) (packet + head_len);
			if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
				goto hw_xsum;
		}
		if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
			skb->ip_summed = CHECKSUM_UNNECESSARY;
			return;
		}
	}

hw_xsum :
	return;
}

static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
					       u8 que)
{
	struct atl1e_rx_page_desc *rx_page_desc =
		(struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
	u8 rx_using = rx_page_desc[que].rx_using;

	return &(rx_page_desc[que].rx_page[rx_using]);
}

static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
		   int *work_done, int work_to_do)
{
	struct net_device *netdev  = adapter->netdev;
	struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
	struct atl1e_rx_page_desc *rx_page_desc =
		(struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
	struct sk_buff *skb = NULL;
	struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
	u32 packet_size, write_offset;
	struct atl1e_recv_ret_status *prrs;

	write_offset = *(rx_page->write_offset_addr);
	if (likely(rx_page->read_offset < write_offset)) {
		do {
			if (*work_done >= work_to_do)
				break;
			(*work_done)++;
			/* get new packet's  rrs */
			prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
						 rx_page->read_offset);
			/* check sequence number */
			if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
				netdev_err(netdev,
					   "rx sequence number error (rx=%d) (expect=%d)\n",
					   prrs->seq_num,
					   rx_page_desc[que].rx_nxseq);
				rx_page_desc[que].rx_nxseq++;
				/* just for debug use */
				AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
					     (((u32)prrs->seq_num) << 16) |
					     rx_page_desc[que].rx_nxseq);
				goto fatal_err;
			}
			rx_page_desc[que].rx_nxseq++;

			/* error packet */
			if ((prrs->pkt_flag & RRS_IS_ERR_FRAME) &&
			    !(netdev->features & NETIF_F_RXALL)) {
				if (prrs->err_flag & (RRS_ERR_BAD_CRC |
					RRS_ERR_DRIBBLE | RRS_ERR_CODE |
					RRS_ERR_TRUNC)) {
				/* hardware error, discard this packet*/
					netdev_err(netdev,
						   "rx packet desc error %x\n",
						   *((u32 *)prrs + 1));
					goto skip_pkt;
				}
			}

			packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
					RRS_PKT_SIZE_MASK);
			if (likely(!(netdev->features & NETIF_F_RXFCS)))
				packet_size -= 4; /* CRC */

			skb = netdev_alloc_skb_ip_align(netdev, packet_size);
			if (skb == NULL)
				goto skip_pkt;

			memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
			skb_put(skb, packet_size);
			skb->protocol = eth_type_trans(skb, netdev);
			atl1e_rx_checksum(adapter, skb, prrs);

			if (prrs->pkt_flag & RRS_IS_VLAN_TAG) {
				u16 vlan_tag = (prrs->vtag >> 4) |
					       ((prrs->vtag & 7) << 13) |
					       ((prrs->vtag & 8) << 9);
				netdev_dbg(netdev,
					   "RXD VLAN TAG<RRD>=0x%04x\n",
					   prrs->vtag);
				__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
			}
			napi_gro_receive(&adapter->napi, skb);

skip_pkt:
	/* skip current packet whether it's ok or not. */
			rx_page->read_offset +=
				(((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
				RRS_PKT_SIZE_MASK) +
				sizeof(struct atl1e_recv_ret_status) + 31) &
						0xFFFFFFE0);

			if (rx_page->read_offset >= rx_ring->page_size) {
				/* mark this page clean */
				u16 reg_addr;
				u8  rx_using;

				rx_page->read_offset =
					*(rx_page->write_offset_addr) = 0;
				rx_using = rx_page_desc[que].rx_using;
				reg_addr =
					atl1e_rx_page_vld_regs[que][rx_using];
				AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
				rx_page_desc[que].rx_using ^= 1;
				rx_page = atl1e_get_rx_page(adapter, que);
			}
			write_offset = *(rx_page->write_offset_addr);
		} while (rx_page->read_offset < write_offset);
	}

	return;

fatal_err:
	if (!test_bit(__AT_DOWN, &adapter->flags))
		schedule_work(&adapter->reset_task);
}

/**
 * atl1e_clean - NAPI Rx polling callback
 * @napi: napi info
 * @budget: number of packets to clean
 */
static int atl1e_clean(struct napi_struct *napi, int budget)
{
	struct atl1e_adapter *adapter =
			container_of(napi, struct atl1e_adapter, napi);
	u32 imr_data;
	int work_done = 0;

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

	atl1e_clean_rx_irq(adapter, 0, &work_done, budget);

	/* If no Tx and not enough Rx work done, exit the polling mode */
	if (work_done < budget) {
quit_polling:
		napi_complete_done(napi, work_done);
		imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
		AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
		/* test debug */
		if (test_bit(__AT_DOWN, &adapter->flags)) {
			atomic_dec(&adapter->irq_sem);
			netdev_err(adapter->netdev,
				   "atl1e_clean is called when AT_DOWN\n");
		}
		/* reenable RX intr */
		/*atl1e_irq_enable(adapter); */

	}
	return work_done;
}

#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 atl1e_netpoll(struct net_device *netdev)
{
	struct atl1e_adapter *adapter = netdev_priv(netdev);

	disable_irq(adapter->pdev->irq);
	atl1e_intr(adapter->pdev->irq, netdev);
	enable_irq(adapter->pdev->irq);
}
#endif

static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
{
	struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
	u16 next_to_use = 0;
	u16 next_to_clean = 0;

	next_to_clean = atomic_read(&tx_ring->next_to_clean);
	next_to_use   = tx_ring->next_to_use;

	return (u16)(next_to_clean > next_to_use) ?
		(next_to_clean - next_to_use - 1) :
		(tx_ring->count + next_to_clean - next_to_use - 1);
}

/*
 * get next usable tpd
 * Note: should call atl1e_tdp_avail to make sure
 * there is enough tpd to use
 */
static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
{
	struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
	u16 next_to_use = 0;

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

	memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
	return &tx_ring->desc[next_to_use];
}

static struct atl1e_tx_buffer *
atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
{
	struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;

	return &tx_ring->tx_buffer[tpd - tx_ring->desc];
}

/* Calculate the transmit packet descript needed*/
static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
{
	int i = 0;
	u16 tpd_req = 1;
	u16 fg_size = 0;
	u16 proto_hdr_len = 0;

	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
		fg_size = skb_frag_size(&skb_shinfo(skb)->frags[i]);
		tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
	}

	if (skb_is_gso(skb)) {
		if (skb->protocol == htons(ETH_P_IP) ||
		   (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
			proto_hdr_len = skb_tcp_all_headers(skb);
			if (proto_hdr_len < skb_headlen(skb)) {
				tpd_req += ((skb_headlen(skb) - proto_hdr_len +
					   MAX_TX_BUF_LEN - 1) >>
					   MAX_TX_BUF_SHIFT);
			}
		}

	}
	return tpd_req;
}

static int atl1e_tso_csum(struct atl1e_adapter *adapter,
		       struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
{
	unsigned short offload_type;
	u8 hdr_len;
	u32 real_len;

	if (skb_is_gso(skb)) {
		int err;

		err = skb_cow_head(skb, 0);
		if (err < 0)
			return err;

		offload_type = skb_shinfo(skb)->gso_type;

		if (offload_type & SKB_GSO_TCPV4) {
			real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
					+ ntohs(ip_hdr(skb)->tot_len));

			if (real_len < skb->len) {
				err = pskb_trim(skb, real_len);
				if (err)
					return err;
			}

			hdr_len = skb_tcp_all_headers(skb);
			if (unlikely(skb->len == hdr_len)) {
				/* only xsum need */
				netdev_warn(adapter->netdev,
					    "IPV4 tso with zero data??\n");
				goto check_sum;
			} else {
				ip_hdr(skb)->check = 0;
				ip_hdr(skb)->tot_len = 0;
				tcp_hdr(skb)->check = ~csum_tcpudp_magic(
							ip_hdr(skb)->saddr,
							ip_hdr(skb)->daddr,
							0, IPPROTO_TCP, 0);
				tpd->word3 |= (ip_hdr(skb)->ihl &
					TDP_V4_IPHL_MASK) <<
					TPD_V4_IPHL_SHIFT;
				tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
					TPD_TCPHDRLEN_MASK) <<
					TPD_TCPHDRLEN_SHIFT;
				tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
					TPD_MSS_MASK) << TPD_MSS_SHIFT;
				tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
			}
			return 0;
		}
	}

check_sum:
	if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
		u8 css, cso;

		cso = skb_checksum_start_offset(skb);
		if (unlikely(cso & 0x1)) {
			netdev_err(adapter->netdev,
				   "payload offset should not ant event number\n");
			return -1;
		} else {
			css = cso + skb->csum_offset;
			tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
					TPD_PLOADOFFSET_SHIFT;
			tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
					TPD_CCSUMOFFSET_SHIFT;
			tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
		}
	}

	return 0;
}

static int atl1e_tx_map(struct atl1e_adapter *adapter,
			struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
{
	struct atl1e_tpd_desc *use_tpd = NULL;
	struct atl1e_tx_buffer *tx_buffer = NULL;
	u16 buf_len = skb_headlen(skb);
	u16 map_len = 0;
	u16 mapped_len = 0;
	u16 hdr_len = 0;
	u16 nr_frags;
	u16 f;
	int segment;
	int ring_start = adapter->tx_ring.next_to_use;
	int ring_end;

	nr_frags = skb_shinfo(skb)->nr_frags;
	segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
	if (segment) {
		/* TSO */
		hdr_len = skb_tcp_all_headers(skb);
		map_len = hdr_len;
		use_tpd = tpd;

		tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
		tx_buffer->length = map_len;
		tx_buffer->dma = dma_map_single(&adapter->pdev->dev,
						skb->data, hdr_len,
						DMA_TO_DEVICE);
		if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma))
			return -ENOSPC;

		ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
		mapped_len += map_len;
		use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
		use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
			((cpu_to_le32(tx_buffer->length) &
			TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
	}

	while (mapped_len < buf_len) {
		/* mapped_len == 0, means we should use the first tpd,
		   which is given by caller  */
		if (mapped_len == 0) {
			use_tpd = tpd;
		} else {
			use_tpd = atl1e_get_tpd(adapter);
			memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
		}
		tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
		tx_buffer->skb = NULL;

		tx_buffer->length = map_len =
			((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
			MAX_TX_BUF_LEN : (buf_len - mapped_len);
		tx_buffer->dma =
			dma_map_single(&adapter->pdev->dev,
				       skb->data + mapped_len, map_len,
				       DMA_TO_DEVICE);

		if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
			/* We need to unwind the mappings we've done */
			ring_end = adapter->tx_ring.next_to_use;
			adapter->tx_ring.next_to_use = ring_start;
			while (adapter->tx_ring.next_to_use != ring_end) {
				tpd = atl1e_get_tpd(adapter);
				tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
				dma_unmap_single(&adapter->pdev->dev,
						 tx_buffer->dma,
						 tx_buffer->length,
						 DMA_TO_DEVICE);
			}
			/* Reset the tx rings next pointer */
			adapter->tx_ring.next_to_use = ring_start;
			return -ENOSPC;
		}

		ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
		mapped_len  += map_len;
		use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
		use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
			((cpu_to_le32(tx_buffer->length) &
			TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
	}

	for (f = 0; f < nr_frags; f++) {
		const skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
		u16 i;
		u16 seg_num;

		buf_len = skb_frag_size(frag);

		seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
		for (i = 0; i < seg_num; i++) {
			use_tpd = atl1e_get_tpd(adapter);
			memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));

			tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
			BUG_ON(tx_buffer->skb);

			tx_buffer->skb = NULL;
			tx_buffer->length =
				(buf_len > MAX_TX_BUF_LEN) ?
				MAX_TX_BUF_LEN : buf_len;
			buf_len -= tx_buffer->length;

			tx_buffer->dma = skb_frag_dma_map(&adapter->pdev->dev,
							  frag,
							  (i * MAX_TX_BUF_LEN),
							  tx_buffer->length,
							  DMA_TO_DEVICE);

			if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
				/* We need to unwind the mappings we've done */
				ring_end = adapter->tx_ring.next_to_use;
				adapter->tx_ring.next_to_use = ring_start;
				while (adapter->tx_ring.next_to_use != ring_end) {
					tpd = atl1e_get_tpd(adapter);
					tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
					dma_unmap_page(&adapter->pdev->dev, tx_buffer->dma,
						       tx_buffer->length, DMA_TO_DEVICE);
				}

				/* Reset the ring next to use pointer */
				adapter->tx_ring.next_to_use = ring_start;
				return -ENOSPC;
			}

			ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
			use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
			use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
					((cpu_to_le32(tx_buffer->length) &
					TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
		}
	}

	if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
		/* note this one is a tcp header */
		tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
	/* The last tpd */

	use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
	/* The last buffer info contain the skb address,
	   so it will be free after unmap */
	tx_buffer->skb = skb;
	return 0;
}

static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
			   struct atl1e_tpd_desc *tpd)
{
	struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
	/* 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();
	AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
}

static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
					  struct net_device *netdev)
{
	struct atl1e_adapter *adapter = netdev_priv(netdev);
	u16 tpd_req = 1;
	struct atl1e_tpd_desc *tpd;

	if (test_bit(__AT_DOWN, &adapter->flags)) {
		dev_kfree_skb_any(skb);
		return NETDEV_TX_OK;
	}

	if (unlikely(skb->len <= 0)) {
		dev_kfree_skb_any(skb);
		return NETDEV_TX_OK;
	}
	tpd_req = atl1e_cal_tdp_req(skb);

	if (atl1e_tpd_avail(adapter) < tpd_req) {
		/* no enough descriptor, just stop queue */
		netif_stop_queue(netdev);
		return NETDEV_TX_BUSY;
	}

	tpd = atl1e_get_tpd(adapter);

	if (skb_vlan_tag_present(skb)) {
		u16 vlan_tag = skb_vlan_tag_get(skb);
		u16 atl1e_vlan_tag;

		tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
		AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
		tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
				TPD_VLAN_SHIFT;
	}

	if (skb->protocol == htons(ETH_P_8021Q))
		tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;

	if (skb_network_offset(skb) != ETH_HLEN)
		tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */

	/* do TSO and check sum */
	if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
		dev_kfree_skb_any(skb);
		return NETDEV_TX_OK;
	}

	if (atl1e_tx_map(adapter, skb, tpd)) {
		dev_kfree_skb_any(skb);
		goto out;
	}

	atl1e_tx_queue(adapter, tpd_req, tpd);
out:
	return NETDEV_TX_OK;
}

static void atl1e_free_irq(struct atl1e_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;

	free_irq(adapter->pdev->irq, netdev);
}

static int atl1e_request_irq(struct atl1e_adapter *adapter)
{
	struct pci_dev    *pdev   = adapter->pdev;
	struct net_device *netdev = adapter->netdev;
	int err = 0;

	err = request_irq(pdev->irq, atl1e_intr, IRQF_SHARED, netdev->name,
			  netdev);
	if (err) {
		netdev_dbg(adapter->netdev,
			   "Unable to allocate interrupt Error: %d\n", err);
		return err;
	}
	netdev_dbg(netdev, "atl1e_request_irq OK\n");
	return err;
}

int atl1e_up(struct atl1e_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	int err = 0;
	u32 val;

	/* hardware has been reset, we need to reload some things */
	err = atl1e_init_hw(&adapter->hw);
	if (err) {
		err = -EIO;
		return err;
	}
	atl1e_init_ring_ptrs(adapter);
	atl1e_set_multi(netdev);
	atl1e_restore_vlan(adapter);

	if (atl1e_configure(adapter)) {
		err = -EIO;
		goto err_up;
	}

	clear_bit(__AT_DOWN, &adapter->flags);
	napi_enable(&adapter->napi);
	atl1e_irq_enable(adapter);
	val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
	AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
		      val | MASTER_CTRL_MANUAL_INT);

err_up:
	return err;
}

void atl1e_down(struct atl1e_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;

	/* signal that we're down so the interrupt handler does not
	 * reschedule our watchdog timer */
	set_bit(__AT_DOWN, &adapter->flags);

	netif_stop_queue(netdev);

	/* reset MAC to disable all RX/TX */
	atl1e_reset_hw(&adapter->hw);
	msleep(1);

	napi_disable(&adapter->napi);
	atl1e_del_timer(adapter);
	atl1e_irq_disable(adapter);

	netif_carrier_off(netdev);
	adapter->link_speed = SPEED_0;
	adapter->link_duplex = -1;
	atl1e_clean_tx_ring(adapter);
	atl1e_clean_rx_ring(adapter);
}

/**
 * atl1e_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 atl1e_open(struct net_device *netdev)
{
	struct atl1e_adapter *adapter = netdev_priv(netdev);
	int err;

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

	/* allocate rx/tx dma buffer & descriptors */
	atl1e_init_ring_resources(adapter);
	err = atl1e_setup_ring_resources(adapter);
	if (unlikely(err))
		return err;

	err = atl1e_request_irq(adapter);
	if (unlikely(err))
		goto err_req_irq;

	err = atl1e_up(adapter);
	if (unlikely(err))
		goto err_up;

	return 0;

err_up:
	atl1e_free_irq(adapter);
err_req_irq:
	atl1e_free_ring_resources(adapter);
	atl1e_reset_hw(&adapter->hw);

	return err;
}

/**
 * atl1e_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 atl1e_close(struct net_device *netdev)
{
	struct atl1e_adapter *adapter = netdev_priv(netdev);

	WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
	atl1e_down(adapter);
	atl1e_free_irq(adapter);
	atl1e_free_ring_resources(adapter);

	return 0;
}

static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct atl1e_adapter *adapter = netdev_priv(netdev);
	struct atl1e_hw *hw = &adapter->hw;
	u32 ctrl = 0;
	u32 mac_ctrl_data = 0;
	u32 wol_ctrl_data = 0;
	u16 mii_advertise_data = 0;
	u16 mii_bmsr_data = 0;
	u16 mii_intr_status_data = 0;
	u32 wufc = adapter->wol;
	u32 i;
#ifdef CONFIG_PM
	int retval = 0;
#endif

	if (netif_running(netdev)) {
		WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
		atl1e_down(adapter);
	}
	netif_device_detach(netdev);

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

	if (wufc) {
		/* get link status */
		atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
		atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);

		mii_advertise_data = ADVERTISE_10HALF;

		if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) ||
		    (atl1e_write_phy_reg(hw,
			   MII_ADVERTISE, mii_advertise_data) != 0) ||
		    (atl1e_phy_commit(hw)) != 0) {
			netdev_dbg(adapter->netdev, "set phy register failed\n");
			goto wol_dis;
		}

		hw->phy_configured = false; /* re-init PHY when resume */

		/* turn on magic packet wol */
		if (wufc & AT_WUFC_MAG)
			wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;

		if (wufc & AT_WUFC_LNKC) {
		/* if orignal link status is link, just wait for retrive link */
			if (mii_bmsr_data & BMSR_LSTATUS) {
				for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
					msleep(100);
					atl1e_read_phy_reg(hw, MII_BMSR,
							&mii_bmsr_data);
					if (mii_bmsr_data & BMSR_LSTATUS)
						break;
				}

				if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
					netdev_dbg(adapter->netdev,
						   "Link may change when suspend\n");
			}
			wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
			/* only link up can wake up */
			if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
				netdev_dbg(adapter->netdev,
					   "read write phy register failed\n");
				goto wol_dis;
			}
		}
		/* clear phy interrupt */
		atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
		/* Config MAC Ctrl register */
		mac_ctrl_data = MAC_CTRL_RX_EN;
		/* set to 10/100M halt duplex */
		mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
		mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
				 MAC_CTRL_PRMLEN_MASK) <<
				 MAC_CTRL_PRMLEN_SHIFT);

		__atl1e_vlan_mode(netdev->features, &mac_ctrl_data);

		/* magic packet maybe Broadcast&multicast&Unicast frame */
		if (wufc & AT_WUFC_MAG)
			mac_ctrl_data |= MAC_CTRL_BC_EN;

		netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
			   mac_ctrl_data);

		AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
		AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
		/* pcie patch */
		ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
		ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
		AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
		pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
		goto suspend_exit;
	}
wol_dis:

	/* WOL disabled */
	AT_WRITE_REG(hw, REG_WOL_CTRL, 0);

	/* pcie patch */
	ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
	ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
	AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);

	atl1e_force_ps(hw);
	hw->phy_configured = false; /* re-init PHY when resume */

	pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);

suspend_exit:

	if (netif_running(netdev))
		atl1e_free_irq(adapter);

	pci_disable_device(pdev);

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

	return 0;
}

#ifdef CONFIG_PM
static int atl1e_resume(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct atl1e_adapter *adapter = netdev_priv(netdev);
	u32 err;

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

	err = pci_enable_device(pdev);
	if (err) {
		netdev_err(adapter->netdev,
			   "Cannot enable PCI device from suspend\n");
		return err;
	}

	pci_set_master(pdev);

	AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */

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

	AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);

	if (netif_running(netdev)) {
		err = atl1e_request_irq(adapter);
		if (err)
			return err;
	}

	atl1e_reset_hw(&adapter->hw);

	if (netif_running(netdev))
		atl1e_up(adapter);

	netif_device_attach(netdev);

	return 0;
}
#endif

static void atl1e_shutdown(struct pci_dev *pdev)
{
	atl1e_suspend(pdev, PMSG_SUSPEND);
}

static const struct net_device_ops atl1e_netdev_ops = {
	.ndo_open		= atl1e_open,
	.ndo_stop		= atl1e_close,
	.ndo_start_xmit		= atl1e_xmit_frame,
	.ndo_get_stats		= atl1e_get_stats,
	.ndo_set_rx_mode	= atl1e_set_multi,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address	= atl1e_set_mac_addr,
	.ndo_fix_features	= atl1e_fix_features,
	.ndo_set_features	= atl1e_set_features,
	.ndo_change_mtu		= atl1e_change_mtu,
	.ndo_eth_ioctl		= atl1e_ioctl,
	.ndo_tx_timeout		= atl1e_tx_timeout,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= atl1e_netpoll,
#endif

};

static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
{
	SET_NETDEV_DEV(netdev, &pdev->dev);
	pci_set_drvdata(pdev, netdev);

	netdev->netdev_ops = &atl1e_netdev_ops;

	netdev->watchdog_timeo = AT_TX_WATCHDOG;
	/* MTU range: 42 - 8170 */
	netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
	netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
			  (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
	atl1e_set_ethtool_ops(netdev);

	netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO |
			      NETIF_F_HW_VLAN_CTAG_RX;
	netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_TX;
	/* not enabled by default */
	netdev->hw_features |= NETIF_F_RXALL | NETIF_F_RXFCS;
	return 0;
}

/**
 * atl1e_probe - Device Initialization Routine
 * @pdev: PCI device information struct
 * @ent: entry in atl1e_pci_tbl
 *
 * Returns 0 on success, negative on failure
 *
 * atl1e_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 atl1e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	struct net_device *netdev;
	struct atl1e_adapter *adapter = NULL;
	static int cards_found;

	int err = 0;

	err = pci_enable_device(pdev);
	if (err)
		return dev_err_probe(&pdev->dev, err, "cannot enable PCI device\n");

	/*
	 * The atl1e chip can DMA to 64-bit addresses, but it uses a single
	 * shared register for the high 32 bits, so only a single, aligned,
	 * 4 GB physical address range can be used at a time.
	 *
	 * Supporting 64-bit DMA on this hardware is more trouble than it's
	 * worth.  It is far easier to limit to 32-bit DMA than update
	 * various kernel subsystems to support the mechanics required by a
	 * fixed-high-32-bit system.
	 */
	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
	if (err) {
		dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
		goto err_dma;
	}

	err = pci_request_regions(pdev, atl1e_driver_name);
	if (err) {
		dev_err(&pdev->dev, "cannot obtain PCI resources\n");
		goto err_pci_reg;
	}

	pci_set_master(pdev);

	netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
	if (netdev == NULL) {
		err = -ENOMEM;
		goto err_alloc_etherdev;
	}

	err = atl1e_init_netdev(netdev, pdev);
	if (err) {
		netdev_err(netdev, "init netdevice failed\n");
		goto err_init_netdev;
	}
	adapter = netdev_priv(netdev);
	adapter->bd_number = cards_found;
	adapter->netdev = netdev;
	adapter->pdev = pdev;
	adapter->hw.adapter = adapter;
	adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
	if (!adapter->hw.hw_addr) {
		err = -EIO;
		netdev_err(netdev, "cannot map device registers\n");
		goto err_ioremap;
	}

	/* init mii data */
	adapter->mii.dev = netdev;
	adapter->mii.mdio_read  = atl1e_mdio_read;
	adapter->mii.mdio_write = atl1e_mdio_write;
	adapter->mii.phy_id_mask = 0x1f;
	adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;

	netif_napi_add(netdev, &adapter->napi, atl1e_clean);

	timer_setup(&adapter->phy_config_timer, atl1e_phy_config, 0);

	/* get user settings */
	atl1e_check_options(adapter);
	/*
	 * Mark all PCI regions associated with PCI device
	 * pdev as being reserved by owner atl1e_driver_name
	 * Enables bus-mastering on the device and calls
	 * pcibios_set_master to do the needed arch specific settings
	 */
	atl1e_setup_pcicmd(pdev);
	/* setup the private structure */
	err = atl1e_sw_init(adapter);
	if (err) {
		netdev_err(netdev, "net device private data init failed\n");
		goto err_sw_init;
	}

	/* Init GPHY as early as possible due to power saving issue  */
	atl1e_phy_init(&adapter->hw);
	/* reset the controller to
	 * put the device in a known good starting state */
	err = atl1e_reset_hw(&adapter->hw);
	if (err) {
		err = -EIO;
		goto err_reset;
	}

	if (atl1e_read_mac_addr(&adapter->hw) != 0) {
		err = -EIO;
		netdev_err(netdev, "get mac address failed\n");
		goto err_eeprom;
	}

	eth_hw_addr_set(netdev, adapter->hw.mac_addr);
	netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);

	INIT_WORK(&adapter->reset_task, atl1e_reset_task);
	INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
	netif_set_tso_max_size(netdev, MAX_TSO_SEG_SIZE);
	err = register_netdev(netdev);
	if (err) {
		netdev_err(netdev, "register netdevice failed\n");
		goto err_register;
	}

	/* assume we have no link for now */
	netif_stop_queue(netdev);
	netif_carrier_off(netdev);

	cards_found++;

	return 0;

err_reset:
err_register:
err_sw_init:
err_eeprom:
	pci_iounmap(pdev, adapter->hw.hw_addr);
err_init_netdev:
err_ioremap:
	free_netdev(netdev);
err_alloc_etherdev:
	pci_release_regions(pdev);
err_pci_reg:
err_dma:
	pci_disable_device(pdev);
	return err;
}

/**
 * atl1e_remove - Device Removal Routine
 * @pdev: PCI device information struct
 *
 * atl1e_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 atl1e_remove(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct atl1e_adapter *adapter = netdev_priv(netdev);

	/*
	 * flush_scheduled work may reschedule our watchdog task, so
	 * explicitly disable watchdog tasks from being rescheduled
	 */
	set_bit(__AT_DOWN, &adapter->flags);

	atl1e_del_timer(adapter);
	atl1e_cancel_work(adapter);

	unregister_netdev(netdev);
	atl1e_free_ring_resources(adapter);
	atl1e_force_ps(&adapter->hw);
	pci_iounmap(pdev, adapter->hw.hw_addr);
	pci_release_regions(pdev);
	free_netdev(netdev);
	pci_disable_device(pdev);
}

/**
 * atl1e_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
atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct atl1e_adapter *adapter = netdev_priv(netdev);

	netif_device_detach(netdev);

	if (state == pci_channel_io_perm_failure)
		return PCI_ERS_RESULT_DISCONNECT;

	if (netif_running(netdev))
		atl1e_down(adapter);

	pci_disable_device(pdev);

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

/**
 * atl1e_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. Implementation
 * resembles the first-half of the e1000_resume routine.
 */
static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct atl1e_adapter *adapter = netdev_priv(netdev);

	if (pci_enable_device(pdev)) {
		netdev_err(adapter->netdev,
			   "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);

	atl1e_reset_hw(&adapter->hw);

	return PCI_ERS_RESULT_RECOVERED;
}

/**
 * atl1e_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. Implementation resembles the
 * second-half of the atl1e_resume routine.
 */
static void atl1e_io_resume(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct atl1e_adapter *adapter = netdev_priv(netdev);

	if (netif_running(netdev)) {
		if (atl1e_up(adapter)) {
			netdev_err(adapter->netdev,
				   "can't bring device back up after reset\n");
			return;
		}
	}

	netif_device_attach(netdev);
}

static const struct pci_error_handlers atl1e_err_handler = {
	.error_detected = atl1e_io_error_detected,
	.slot_reset = atl1e_io_slot_reset,
	.resume = atl1e_io_resume,
};

static struct pci_driver atl1e_driver = {
	.name     = atl1e_driver_name,
	.id_table = atl1e_pci_tbl,
	.probe    = atl1e_probe,
	.remove   = atl1e_remove,
	/* Power Management Hooks */
#ifdef CONFIG_PM
	.suspend  = atl1e_suspend,
	.resume   = atl1e_resume,
#endif
	.shutdown = atl1e_shutdown,
	.err_handler = &atl1e_err_handler
};

module_pci_driver(atl1e_driver);