summaryrefslogtreecommitdiff
path: root/drivers/s390/net/claw.c
blob: 1a1c3decea728c0ec0ae48fcc50398e662d1ce41 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
/*
 *  drivers/s390/net/claw.c
 *    ESCON CLAW network driver
 *
 *    $Revision: 1.38 $ $Date: 2005/08/29 09:47:04 $
 *
 *  Linux for zSeries version
 *    Copyright (C) 2002,2005 IBM Corporation
 *  Author(s) Original code written by:
 *              Kazuo Iimura (iimura@jp.ibm.com)
 *   	      Rewritten by
 *              Andy Richter (richtera@us.ibm.com)
 *              Marc Price (mwprice@us.ibm.com)
 *
 *    sysfs parms:
 *   group x.x.rrrr,x.x.wwww
 *   read_buffer nnnnnnn
 *   write_buffer nnnnnn
 *   host_name  aaaaaaaa
 *   adapter_name aaaaaaaa
 *   api_type    aaaaaaaa
 *
 *  eg.
 *   group  0.0.0200 0.0.0201
 *   read_buffer 25
 *   write_buffer 20
 *   host_name LINUX390
 *   adapter_name RS6K
 *   api_type     TCPIP
 *
 *  where
 *
 *   The device id is decided by the order entries
 *   are added to the group the first is claw0 the second claw1
 *   up to CLAW_MAX_DEV
 *
 *   rrrr     -	the first of 2 consecutive device addresses used for the
 *		CLAW protocol.
 *		The specified address is always used as the input (Read)
 *		channel and the next address is used as the output channel.
 *
 *   wwww     -	the second of 2 consecutive device addresses used for
 *		the CLAW protocol.
 *              The specified address is always used as the output
 *		channel and the previous address is used as the input channel.
 *
 *   read_buffer	-       specifies number of input buffers to allocate.
 *   write_buffer       -       specifies number of output buffers to allocate.
 *   host_name          -       host name
 *   adaptor_name       -       adaptor name
 *   api_type           -       API type TCPIP or API will be sent and expected
 *				as ws_name
 *
 *   Note the following requirements:
 *   1)  host_name must match the configured adapter_name on the remote side
 *   2)  adaptor_name must match the configured host name on the remote side
 *
 *  Change History
 *    1.00  Initial release shipped
 *    1.10  Changes for Buffer allocation
 *    1.15  Changed for 2.6 Kernel  No longer compiles on 2.4 or lower
 *    1.25  Added Packing support
 */
#include <asm/bitops.h>
#include <asm/ccwdev.h>
#include <asm/ccwgroup.h>
#include <asm/debug.h>
#include <asm/idals.h>
#include <asm/io.h>

#include <linux/ctype.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/if_arp.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ip.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/proc_fs.h>
#include <linux/sched.h>
#include <linux/signal.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/tcp.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/version.h>

#include "cu3088.h"
#include "claw.h"

MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
MODULE_DESCRIPTION("Linux for zSeries CLAW Driver\n" \
			"Copyright 2000,2005 IBM Corporation\n");
MODULE_LICENSE("GPL");

/* Debugging is based on DEBUGMSG, IOTRACE, or FUNCTRACE  options:
   DEBUGMSG  - Enables output of various debug messages in the code
   IOTRACE   - Enables output of CCW and other IO related traces
   FUNCTRACE - Enables output of function entry/exit trace
   Define any combination of above options to enable tracing

   CLAW also uses the s390dbf file system  see claw_trace and claw_setup
*/

/* following enables tracing */
//#define DEBUGMSG
//#define IOTRACE
//#define FUNCTRACE

#ifdef DEBUGMSG
#define DEBUG
#endif

#ifdef IOTRACE
#define DEBUG
#endif

#ifdef FUNCTRACE
#define DEBUG
#endif

 char debug_buffer[255];
/**
 * Debug Facility Stuff
 */
static debug_info_t *claw_dbf_setup;
static debug_info_t *claw_dbf_trace;

/**
 *  CLAW Debug Facility functions
 */
static void
claw_unregister_debug_facility(void)
{
	if (claw_dbf_setup)
		debug_unregister(claw_dbf_setup);
	if (claw_dbf_trace)
		debug_unregister(claw_dbf_trace);
}

static int
claw_register_debug_facility(void)
{
	claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
	claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
	if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
		printk(KERN_WARNING "Not enough memory for debug facility.\n");
		claw_unregister_debug_facility();
		return -ENOMEM;
	}
	debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
	debug_set_level(claw_dbf_setup, 2);
	debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
	debug_set_level(claw_dbf_trace, 2);
	return 0;
}

static inline void
claw_set_busy(struct net_device *dev)
{
 ((struct claw_privbk *) dev->priv)->tbusy=1;
 eieio();
}

static inline void
claw_clear_busy(struct net_device *dev)
{
	clear_bit(0, &(((struct claw_privbk *) dev->priv)->tbusy));
	netif_wake_queue(dev);
	eieio();
}

static inline int
claw_check_busy(struct net_device *dev)
{
	eieio();
	return ((struct claw_privbk *) dev->priv)->tbusy;
}

static inline void
claw_setbit_busy(int nr,struct net_device *dev)
{
	netif_stop_queue(dev);
 	set_bit(nr, (void *)&(((struct claw_privbk *)dev->priv)->tbusy));
}

static inline void
claw_clearbit_busy(int nr,struct net_device *dev)
{
 	clear_bit(nr,(void *)&(((struct claw_privbk *)dev->priv)->tbusy));
	netif_wake_queue(dev);
}

static inline int
claw_test_and_setbit_busy(int nr,struct net_device *dev)
{
	netif_stop_queue(dev);
	return test_and_set_bit(nr,
 		(void *)&(((struct claw_privbk *) dev->priv)->tbusy));
}


/* Functions for the DEV methods */

static int claw_probe(struct ccwgroup_device *cgdev);
static void claw_remove_device(struct ccwgroup_device *cgdev);
static void claw_purge_skb_queue(struct sk_buff_head *q);
static int claw_new_device(struct ccwgroup_device *cgdev);
static int claw_shutdown_device(struct ccwgroup_device *cgdev);
static int claw_tx(struct sk_buff *skb, struct net_device *dev);
static int claw_change_mtu( struct net_device *dev, int new_mtu);
static int claw_open(struct net_device *dev);
static void claw_irq_handler(struct ccw_device *cdev,
	unsigned long intparm, struct irb *irb);
static void claw_irq_tasklet ( unsigned long data );
static int claw_release(struct net_device *dev);
static void claw_write_retry ( struct chbk * p_ch );
static void claw_write_next ( struct chbk * p_ch );
static void claw_timer ( struct chbk * p_ch );

/* Functions */
static int add_claw_reads(struct net_device *dev,
	struct ccwbk* p_first, struct ccwbk* p_last);
static void inline ccw_check_return_code (struct ccw_device *cdev,
        int return_code);
static void inline ccw_check_unit_check (struct chbk * p_ch,
	unsigned char sense );
static int find_link(struct net_device *dev, char *host_name, char *ws_name );
static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
static int init_ccw_bk(struct net_device *dev);
static void probe_error( struct ccwgroup_device *cgdev);
static struct net_device_stats *claw_stats(struct net_device *dev);
static int inline pages_to_order_of_mag(int num_of_pages);
static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
#ifdef DEBUG
static void dumpit (char *buf, int len);
#endif
/* sysfs Functions */
static ssize_t claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf);
static ssize_t claw_hname_write(struct device *dev, struct device_attribute *attr,
	const char *buf, size_t count);
static ssize_t claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf);
static ssize_t claw_adname_write(struct device *dev, struct device_attribute *attr,
	const char *buf, size_t count);
static ssize_t claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf);
static ssize_t claw_apname_write(struct device *dev, struct device_attribute *attr,
	const char *buf, size_t count);
static ssize_t claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
static ssize_t claw_wbuff_write(struct device *dev, struct device_attribute *attr,
	const char *buf, size_t count);
static ssize_t claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
static ssize_t claw_rbuff_write(struct device *dev, struct device_attribute *attr,
	const char *buf, size_t count);
static int claw_add_files(struct device *dev);
static void claw_remove_files(struct device *dev);

/*   Functions for System Validate  */
static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
       __u8 correlator, __u8 rc , char *local_name, char *remote_name);
static int claw_snd_conn_req(struct net_device *dev, __u8 link);
static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
static int claw_snd_sys_validate_rsp(struct net_device *dev,
        struct clawctl * p_ctl, __u32 return_code);
static int claw_strt_conn_req(struct net_device *dev );
static void claw_strt_read ( struct net_device *dev, int lock );
static void claw_strt_out_IO( struct net_device *dev );
static void claw_free_wrt_buf( struct net_device *dev );

/* Functions for unpack reads   */
static void unpack_read (struct net_device *dev );

/* ccwgroup table  */

static struct ccwgroup_driver claw_group_driver = {
        .owner       = THIS_MODULE,
        .name        = "claw",
        .max_slaves  = 2,
        .driver_id   = 0xC3D3C1E6,
        .probe       = claw_probe,
        .remove      = claw_remove_device,
        .set_online  = claw_new_device,
        .set_offline = claw_shutdown_device,
};

/*
*
*       Key functions
*/

/*----------------------------------------------------------------*
 *   claw_probe                                                   *
 *      this function is called for each CLAW device.             *
 *----------------------------------------------------------------*/
static int
claw_probe(struct ccwgroup_device *cgdev)
{
	int  		rc;
	struct claw_privbk *privptr=NULL;

#ifdef FUNCTRACE
	printk(KERN_INFO "%s Enter\n",__FUNCTION__);
#endif
	CLAW_DBF_TEXT(2,setup,"probe");
	if (!get_device(&cgdev->dev))
		return -ENODEV;
#ifdef DEBUGMSG
        printk(KERN_INFO "claw: variable cgdev =\n");
        dumpit((char *)cgdev, sizeof(struct ccwgroup_device));
#endif
	privptr = kmalloc(sizeof(struct claw_privbk), GFP_KERNEL);
	if (privptr == NULL) {
		probe_error(cgdev);
		put_device(&cgdev->dev);
		printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
			cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
		CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
		return -ENOMEM;
	}
	memset(privptr,0x00,sizeof(struct claw_privbk));
	privptr->p_mtc_envelope= kmalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
	privptr->p_env = kmalloc(sizeof(struct claw_env), GFP_KERNEL);
        if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
                probe_error(cgdev);
		put_device(&cgdev->dev);
		printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
			cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
		CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
                return -ENOMEM;
        }
	memset(privptr->p_mtc_envelope, 0x00, MAX_ENVELOPE_SIZE);
	memset(privptr->p_env, 0x00, sizeof(struct claw_env));
	memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
	memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
	memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
	privptr->p_env->packing = 0;
	privptr->p_env->write_buffers = 5;
	privptr->p_env->read_buffers = 5;
	privptr->p_env->read_size = CLAW_FRAME_SIZE;
	privptr->p_env->write_size = CLAW_FRAME_SIZE;
	rc = claw_add_files(&cgdev->dev);
	if (rc) {
		probe_error(cgdev);
		put_device(&cgdev->dev);
		printk(KERN_WARNING "add_files failed %s %s Exit Line %d \n",
			cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
		CLAW_DBF_TEXT_(2,setup,"probex%d",rc);
		return rc;
	}
	printk(KERN_INFO "claw: sysfs files added for %s\n",cgdev->cdev[0]->dev.bus_id);
	privptr->p_env->p_priv = privptr;
        cgdev->cdev[0]->handler = claw_irq_handler;
	cgdev->cdev[1]->handler = claw_irq_handler;
	cgdev->dev.driver_data = privptr;
#ifdef FUNCTRACE
        printk(KERN_INFO "claw:%s exit on line %d, "
		"rc = 0\n",__FUNCTION__,__LINE__);
#endif
	CLAW_DBF_TEXT(2,setup,"prbext 0");

        return 0;
}  /*  end of claw_probe       */

/*-------------------------------------------------------------------*
 *   claw_tx                                                         *
 *-------------------------------------------------------------------*/

static int
claw_tx(struct sk_buff *skb, struct net_device *dev)
{
        int             rc;
        struct claw_privbk *privptr=dev->priv;
	unsigned long saveflags;
        struct chbk *p_ch;

#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s enter\n",dev->name,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(4,trace,"claw_tx");
        p_ch=&privptr->channel[WRITE];
        if (skb == NULL) {
                printk(KERN_WARNING "%s: null pointer passed as sk_buffer\n",
			dev->name);
                privptr->stats.tx_dropped++;
#ifdef FUNCTRACE
                printk(KERN_INFO "%s: %s() exit on line %d, rc = EIO\n",
			dev->name,__FUNCTION__, __LINE__);
#endif
		CLAW_DBF_TEXT_(2,trace,"clawtx%d",-EIO);
                return -EIO;
        }

#ifdef IOTRACE
        printk(KERN_INFO "%s: variable sk_buff=\n",dev->name);
        dumpit((char *) skb, sizeof(struct sk_buff));
        printk(KERN_INFO "%s: variable dev=\n",dev->name);
        dumpit((char *) dev, sizeof(struct net_device));
#endif
        spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
        rc=claw_hw_tx( skb, dev, 1 );
        spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s exit on line %d, rc = %d\n",
		dev->name, __FUNCTION__, __LINE__, rc);
#endif
	CLAW_DBF_TEXT_(4,trace,"clawtx%d",rc);
        return rc;
}   /*  end of claw_tx */

/*------------------------------------------------------------------*
 *  pack the collect queue into an skb and return it                *
 *   If not packing just return the top skb from the queue          *
 *------------------------------------------------------------------*/

static struct sk_buff *
claw_pack_skb(struct claw_privbk *privptr)
{
	struct sk_buff *new_skb,*held_skb;
	struct chbk *p_ch = &privptr->channel[WRITE];
	struct claw_env  *p_env = privptr->p_env;
	int	pkt_cnt,pk_ind,so_far;

	new_skb = NULL;		/* assume no dice */
	pkt_cnt = 0;
	CLAW_DBF_TEXT(4,trace,"PackSKBe");
	if (!skb_queue_empty(&p_ch->collect_queue)) {
	/* some data */
		held_skb = skb_dequeue(&p_ch->collect_queue);
		if (held_skb)
			dev_kfree_skb_any(held_skb);
		else
			return NULL;
		if (p_env->packing != DO_PACKED)
			return held_skb;
		/* get a new SKB we will pack at least one */
		new_skb = dev_alloc_skb(p_env->write_size);
		if (new_skb == NULL) {
			atomic_inc(&held_skb->users);
			skb_queue_head(&p_ch->collect_queue,held_skb);
			return NULL;
		}
		/* we have packed packet and a place to put it  */
		pk_ind = 1;
		so_far = 0;
		new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
		while ((pk_ind) && (held_skb != NULL)) {
			if (held_skb->len+so_far <= p_env->write_size-8) {
				memcpy(skb_put(new_skb,held_skb->len),
					held_skb->data,held_skb->len);
				privptr->stats.tx_packets++;
				so_far += held_skb->len;
				pkt_cnt++;
				dev_kfree_skb_any(held_skb);
				held_skb = skb_dequeue(&p_ch->collect_queue);
				if (held_skb)
					atomic_dec(&held_skb->users);
			} else {
				pk_ind = 0;
				atomic_inc(&held_skb->users);
				skb_queue_head(&p_ch->collect_queue,held_skb);
			}
		}
#ifdef IOTRACE
		printk(KERN_INFO "%s: %s() Packed %d len %d\n",
			p_env->ndev->name,
			__FUNCTION__,pkt_cnt,new_skb->len);
#endif
	}
	CLAW_DBF_TEXT(4,trace,"PackSKBx");
	return new_skb;
}

/*-------------------------------------------------------------------*
 *   claw_change_mtu                                                 *
 *                                                                   *
 *-------------------------------------------------------------------*/

static int
claw_change_mtu(struct net_device *dev, int new_mtu)
{
	struct claw_privbk  *privptr=dev->priv;
	int buff_size;
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
#endif
#ifdef DEBUGMSG
        printk(KERN_INFO "variable dev =\n");
        dumpit((char *) dev, sizeof(struct net_device));
        printk(KERN_INFO "variable new_mtu = %d\n", new_mtu);
#endif
	CLAW_DBF_TEXT(4,trace,"setmtu");
	buff_size = privptr->p_env->write_size;
        if ((new_mtu < 60) || (new_mtu > buff_size)) {
#ifdef FUNCTRACE
                printk(KERN_INFO "%s:%s Exit on line %d, rc=EINVAL\n",
		dev->name,
		__FUNCTION__, __LINE__);
#endif
                return -EINVAL;
        }
        dev->mtu = new_mtu;
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Exit on line %d\n",dev->name,
	__FUNCTION__, __LINE__);
#endif
        return 0;
}  /*   end of claw_change_mtu */


/*-------------------------------------------------------------------*
 *   claw_open                                                       *
 *                                                                   *
 *-------------------------------------------------------------------*/
static int
claw_open(struct net_device *dev)
{

        int     rc;
        int     i;
        unsigned long       saveflags=0;
        unsigned long       parm;
        struct claw_privbk  *privptr;
	DECLARE_WAITQUEUE(wait, current);
        struct timer_list  timer;
        struct ccwbk *p_buf;

#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(4,trace,"open");
	if (!dev | (dev->name[0] == 0x00)) {
		CLAW_DBF_TEXT(2,trace,"BadDev");
	 	printk(KERN_WARNING "claw: Bad device at open failing \n");
		return -ENODEV;
	}
	privptr = (struct claw_privbk *)dev->priv;
        /*   allocate and initialize CCW blocks */
	if (privptr->buffs_alloc == 0) {
	        rc=init_ccw_bk(dev);
        	if (rc) {
                	printk(KERN_INFO "%s:%s Exit on line %d, rc=ENOMEM\n",
			dev->name,
			__FUNCTION__, __LINE__);
			CLAW_DBF_TEXT(2,trace,"openmem");
                	return -ENOMEM;
        	}
	}
        privptr->system_validate_comp=0;
        privptr->release_pend=0;
	if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
		privptr->p_env->read_size=DEF_PACK_BUFSIZE;
		privptr->p_env->write_size=DEF_PACK_BUFSIZE;
		privptr->p_env->packing=PACKING_ASK;
	} else {
		privptr->p_env->packing=0;
		privptr->p_env->read_size=CLAW_FRAME_SIZE;
		privptr->p_env->write_size=CLAW_FRAME_SIZE;
	}
        claw_set_busy(dev);
	tasklet_init(&privptr->channel[READ].tasklet, claw_irq_tasklet,
        	(unsigned long) &privptr->channel[READ]);
        for ( i = 0; i < 2;  i++) {
		CLAW_DBF_TEXT_(2,trace,"opn_ch%d",i);
                init_waitqueue_head(&privptr->channel[i].wait);
		/* skb_queue_head_init(&p_ch->io_queue); */
		if (i == WRITE)
			skb_queue_head_init(
				&privptr->channel[WRITE].collect_queue);
                privptr->channel[i].flag_a = 0;
                privptr->channel[i].IO_active = 0;
                privptr->channel[i].flag  &= ~CLAW_TIMER;
                init_timer(&timer);
                timer.function = (void *)claw_timer;
                timer.data = (unsigned long)(&privptr->channel[i]);
                timer.expires = jiffies + 15*HZ;
                add_timer(&timer);
                spin_lock_irqsave(get_ccwdev_lock(
			privptr->channel[i].cdev), saveflags);
                parm = (unsigned long) &privptr->channel[i];
                privptr->channel[i].claw_state = CLAW_START_HALT_IO;
		rc = 0;
		add_wait_queue(&privptr->channel[i].wait, &wait);
                rc = ccw_device_halt(
			(struct ccw_device *)privptr->channel[i].cdev,parm);
                set_current_state(TASK_INTERRUPTIBLE);
                spin_unlock_irqrestore(
			get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
                schedule();
		set_current_state(TASK_RUNNING);
                remove_wait_queue(&privptr->channel[i].wait, &wait);
                if(rc != 0)
                        ccw_check_return_code(privptr->channel[i].cdev, rc);
                if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
                        del_timer(&timer);
        }
        if ((((privptr->channel[READ].last_dstat |
		privptr->channel[WRITE].last_dstat) &
           ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
           (((privptr->channel[READ].flag |
	   	privptr->channel[WRITE].flag) & CLAW_TIMER) != 0x00)) {
#ifdef DEBUGMSG
                printk(KERN_INFO "%s: channel problems during open - read:"
			" %02x -  write: %02x\n",
                        dev->name,
			privptr->channel[READ].last_dstat,
			privptr->channel[WRITE].last_dstat);
#endif
                printk(KERN_INFO "%s: remote side is not ready\n", dev->name);
		CLAW_DBF_TEXT(2,trace,"notrdy");

                for ( i = 0; i < 2;  i++) {
                        spin_lock_irqsave(
				get_ccwdev_lock(privptr->channel[i].cdev),
				saveflags);
                        parm = (unsigned long) &privptr->channel[i];
                        privptr->channel[i].claw_state = CLAW_STOP;
                        rc = ccw_device_halt(
				(struct ccw_device *)&privptr->channel[i].cdev,
				parm);
                        spin_unlock_irqrestore(
				get_ccwdev_lock(privptr->channel[i].cdev),
				saveflags);
                        if (rc != 0) {
                                ccw_check_return_code(
					privptr->channel[i].cdev, rc);
                        }
                }
                free_pages((unsigned long)privptr->p_buff_ccw,
			(int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
                if (privptr->p_env->read_size < PAGE_SIZE) {
                        free_pages((unsigned long)privptr->p_buff_read,
			       (int)pages_to_order_of_mag(
			       		privptr->p_buff_read_num));
                }
                else {
                        p_buf=privptr->p_read_active_first;
                        while (p_buf!=NULL) {
                                free_pages((unsigned long)p_buf->p_buffer,
				      (int)pages_to_order_of_mag(
				      	privptr->p_buff_pages_perread ));
                                p_buf=p_buf->next;
                        }
                }
                if (privptr->p_env->write_size < PAGE_SIZE ) {
                        free_pages((unsigned long)privptr->p_buff_write,
			     (int)pages_to_order_of_mag(
			     	privptr->p_buff_write_num));
                }
                else {
                        p_buf=privptr->p_write_active_first;
                        while (p_buf!=NULL) {
                                free_pages((unsigned long)p_buf->p_buffer,
				     (int)pages_to_order_of_mag(
				     	privptr->p_buff_pages_perwrite ));
                                p_buf=p_buf->next;
                        }
                }
		privptr->buffs_alloc = 0;
		privptr->channel[READ].flag= 0x00;
		privptr->channel[WRITE].flag = 0x00;
                privptr->p_buff_ccw=NULL;
                privptr->p_buff_read=NULL;
                privptr->p_buff_write=NULL;
                claw_clear_busy(dev);
#ifdef FUNCTRACE
                printk(KERN_INFO "%s:%s Exit on line %d, rc=EIO\n",
		dev->name,__FUNCTION__,__LINE__);
#endif
		CLAW_DBF_TEXT(2,trace,"open EIO");
                return -EIO;
        }

        /*   Send SystemValidate command */

        claw_clear_busy(dev);

#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Exit on line %d, rc=0\n",
		dev->name,__FUNCTION__,__LINE__);
#endif
	CLAW_DBF_TEXT(4,trace,"openok");
        return 0;
}    /*     end of claw_open    */

/*-------------------------------------------------------------------*
*                                                                    *
*       claw_irq_handler                                             *
*                                                                    *
*--------------------------------------------------------------------*/
static void
claw_irq_handler(struct ccw_device *cdev,
	unsigned long intparm, struct irb *irb)
{
        struct chbk *p_ch = NULL;
        struct claw_privbk *privptr = NULL;
        struct net_device *dev = NULL;
        struct claw_env  *p_env;
        struct chbk *p_ch_r=NULL;


#ifdef FUNCTRACE
        printk(KERN_INFO "%s enter  \n",__FUNCTION__);
#endif
	CLAW_DBF_TEXT(4,trace,"clawirq");
        /* Bypass all 'unsolicited interrupts' */
	if (!cdev->dev.driver_data) {
                printk(KERN_WARNING "claw: unsolicited interrupt for device:"
		 	"%s received c-%02x d-%02x\n",
                        cdev->dev.bus_id,irb->scsw.cstat, irb->scsw.dstat);
#ifdef FUNCTRACE
                printk(KERN_INFO "claw: %s() "
			"exit on line %d\n",__FUNCTION__,__LINE__);
#endif
		CLAW_DBF_TEXT(2,trace,"badirq");
                return;
        }
	privptr = (struct claw_privbk *)cdev->dev.driver_data;

	/* Try to extract channel from driver data. */
	if (privptr->channel[READ].cdev == cdev)
		p_ch = &privptr->channel[READ];
	else if (privptr->channel[WRITE].cdev == cdev)
		p_ch = &privptr->channel[WRITE];
	else {
		printk(KERN_WARNING "claw: Can't determine channel for "
			"interrupt, device %s\n", cdev->dev.bus_id);
		CLAW_DBF_TEXT(2,trace,"badchan");
		return;
	}
	CLAW_DBF_TEXT_(4,trace,"IRQCH=%d",p_ch->flag);

	dev = (struct net_device *) (p_ch->ndev);
        p_env=privptr->p_env;

#ifdef IOTRACE
        printk(KERN_INFO "%s: interrupt for device: %04x "
		"received c-%02x d-%02x state-%02x\n",
                dev->name, p_ch->devno, irb->scsw.cstat,
		irb->scsw.dstat, p_ch->claw_state);
#endif

	/* Copy interruption response block. */
	memcpy(p_ch->irb, irb, sizeof(struct irb));

        /* Check for good subchannel return code, otherwise error message */
        if (irb->scsw.cstat  &&  !(irb->scsw.cstat & SCHN_STAT_PCI)) {
                printk(KERN_INFO "%s: subchannel check for device: %04x -"
			" Sch Stat %02x  Dev Stat %02x CPA - %04x\n",
                        dev->name, p_ch->devno,
			irb->scsw.cstat, irb->scsw.dstat,irb->scsw.cpa);
#ifdef IOTRACE
		dumpit((char *)irb,sizeof(struct irb));
		dumpit((char *)(unsigned long)irb->scsw.cpa,
			sizeof(struct ccw1));
#endif
#ifdef FUNCTRACE
		printk(KERN_INFO "%s:%s Exit on line %d\n",
		dev->name,__FUNCTION__,__LINE__);
#endif
		CLAW_DBF_TEXT(2,trace,"chanchk");
                /* return; */
        }

        /* Check the reason-code of a unit check */
        if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
                ccw_check_unit_check(p_ch, irb->ecw[0]);
        }

        /* State machine to bring the connection up, down and to restart */
        p_ch->last_dstat = irb->scsw.dstat;

        switch (p_ch->claw_state) {
                case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
#ifdef DEBUGMSG
                        printk(KERN_INFO "%s: CLAW_STOP enter\n", dev->name);
#endif
                        if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
	    		(p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
	    		(p_ch->irb->scsw.stctl ==
	     		(SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
#ifdef FUNCTRACE
                                printk(KERN_INFO "%s:%s Exit on line %d\n",
					dev->name,__FUNCTION__,__LINE__);
#endif
                                return;
                        }
                        wake_up(&p_ch->wait);   /* wake up claw_release */

#ifdef DEBUGMSG
                        printk(KERN_INFO "%s: CLAW_STOP exit\n", dev->name);
#endif
#ifdef FUNCTRACE
                        printk(KERN_INFO "%s:%s Exit on line %d\n",
				dev->name,__FUNCTION__,__LINE__);
#endif
			CLAW_DBF_TEXT(4,trace,"stop");
                        return;

                case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open  */
#ifdef DEBUGMSG
                        printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO\n",
				dev->name);
#endif
                        if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
	    		(p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
	    		(p_ch->irb->scsw.stctl ==
	     		(SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
#ifdef FUNCTRACE
				printk(KERN_INFO "%s:%s Exit on line %d\n",
					dev->name,__FUNCTION__,__LINE__);
#endif
				CLAW_DBF_TEXT(4,trace,"haltio");
                                return;
                        }
                        if (p_ch->flag == CLAW_READ) {
                                p_ch->claw_state = CLAW_START_READ;
                                wake_up(&p_ch->wait); /* wake claw_open (READ)*/
                        }
			else
			   if (p_ch->flag == CLAW_WRITE) {
                                p_ch->claw_state = CLAW_START_WRITE;
                                /*      send SYSTEM_VALIDATE                    */
                                claw_strt_read(dev, LOCK_NO);
                               	claw_send_control(dev,
					SYSTEM_VALIDATE_REQUEST,
					0, 0, 0,
					p_env->host_name,
					p_env->adapter_name );
                        } else {
				printk(KERN_WARNING "claw: unsolicited "
					"interrupt for device:"
				 	"%s received c-%02x d-%02x\n",
                		        cdev->dev.bus_id,
					irb->scsw.cstat,
					irb->scsw.dstat);
				return;
				}
#ifdef DEBUGMSG
                        printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO exit\n",
				dev->name);
#endif
#ifdef FUNCTRACE
                        printk(KERN_INFO "%s:%s Exit on line %d\n",
				dev->name,__FUNCTION__,__LINE__);
#endif
			CLAW_DBF_TEXT(4,trace,"haltio");
                        return;
                case CLAW_START_READ:
			CLAW_DBF_TEXT(4,trace,"ReadIRQ");
                        if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
                                clear_bit(0, (void *)&p_ch->IO_active);
                                if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
                                    (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
                                    (p_ch->irb->ecw[0])        == 0)
                                {
                                        privptr->stats.rx_errors++;
                                        printk(KERN_INFO "%s: Restart is "
						"required after remote "
						"side recovers \n",
						dev->name);
                                }
#ifdef FUNCTRACE
				printk(KERN_INFO "%s:%s Exit on line %d\n",
					dev->name,__FUNCTION__,__LINE__);
#endif
					CLAW_DBF_TEXT(4,trace,"notrdy");
                                        return;
                        }
                        if ((p_ch->irb->scsw.cstat & SCHN_STAT_PCI) &&
			    (p_ch->irb->scsw.dstat==0)) {
                                if (test_and_set_bit(CLAW_BH_ACTIVE,
					(void *)&p_ch->flag_a) == 0) {
					tasklet_schedule(&p_ch->tasklet);
                                }
				else {
					CLAW_DBF_TEXT(4,trace,"PCINoBH");
				}
#ifdef FUNCTRACE
				printk(KERN_INFO "%s:%s Exit on line %d\n",
					dev->name,__FUNCTION__,__LINE__);
#endif
				CLAW_DBF_TEXT(4,trace,"PCI_read");
                                return;
                        }
                        if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
	    		 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
	    		 (p_ch->irb->scsw.stctl ==
	     		 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
#ifdef FUNCTRACE
				printk(KERN_INFO "%s:%s Exit on line %d\n",
					dev->name,__FUNCTION__,__LINE__);
#endif
				CLAW_DBF_TEXT(4,trace,"SPend_rd");
                                return;
                        }
                        clear_bit(0, (void *)&p_ch->IO_active);
                        claw_clearbit_busy(TB_RETRY,dev);
                        if (test_and_set_bit(CLAW_BH_ACTIVE,
    				(void *)&p_ch->flag_a) == 0) {
    				tasklet_schedule(&p_ch->tasklet);
                         }
    			else {
    				CLAW_DBF_TEXT(4,trace,"RdBHAct");
    			}

#ifdef DEBUGMSG
                        printk(KERN_INFO "%s: process CLAW_START_READ exit\n",
				dev->name);
#endif
#ifdef FUNCTRACE
			printk(KERN_INFO "%s:%s Exit on line %d\n",
				dev->name,__FUNCTION__,__LINE__);
#endif
			CLAW_DBF_TEXT(4,trace,"RdIRQXit");
                        return;
                case CLAW_START_WRITE:
                        if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
                                printk(KERN_INFO "%s: Unit Check Occured in "
					"write channel\n",dev->name);
                                clear_bit(0, (void *)&p_ch->IO_active);
                                if (p_ch->irb->ecw[0] & 0x80 ) {
                                        printk(KERN_INFO "%s: Resetting Event "
						"occurred:\n",dev->name);
                                        init_timer(&p_ch->timer);
                                        p_ch->timer.function =
						(void *)claw_write_retry;
                                        p_ch->timer.data = (unsigned long)p_ch;
                                        p_ch->timer.expires = jiffies + 10*HZ;
                                        add_timer(&p_ch->timer);
                                        printk(KERN_INFO "%s: write connection "
						"restarting\n",dev->name);
                                }
#ifdef FUNCTRACE
				printk(KERN_INFO "%s:%s Exit on line %d\n",
					dev->name,__FUNCTION__,__LINE__);
#endif
				CLAW_DBF_TEXT(4,trace,"rstrtwrt");
                                return;
                        }
                        if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) {
                                        clear_bit(0, (void *)&p_ch->IO_active);
                                        printk(KERN_INFO "%s: Unit Exception "
						"Occured in write channel\n",
						dev->name);
                        }
                        if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
	    		(p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
	    		(p_ch->irb->scsw.stctl ==
	     		(SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
#ifdef FUNCTRACE
				printk(KERN_INFO "%s:%s Exit on line %d\n",
					dev->name,__FUNCTION__,__LINE__);
#endif
				CLAW_DBF_TEXT(4,trace,"writeUE");
                                return;
                        }
                        clear_bit(0, (void *)&p_ch->IO_active);
                        if (claw_test_and_setbit_busy(TB_TX,dev)==0) {
                                claw_write_next(p_ch);
                                claw_clearbit_busy(TB_TX,dev);
                                claw_clear_busy(dev);
                        }
                        p_ch_r=(struct chbk *)&privptr->channel[READ];
                        if (test_and_set_bit(CLAW_BH_ACTIVE,
 					(void *)&p_ch_r->flag_a) == 0) {
			 	tasklet_schedule(&p_ch_r->tasklet);
                        }

#ifdef DEBUGMSG
                        printk(KERN_INFO "%s: process CLAW_START_WRITE exit\n",
				 dev->name);
#endif
#ifdef FUNCTRACE
			printk(KERN_INFO "%s:%s Exit on line %d\n",
				dev->name,__FUNCTION__,__LINE__);
#endif
			CLAW_DBF_TEXT(4,trace,"StWtExit");
                        return;
                default:
                        printk(KERN_WARNING "%s: wrong selection code - irq "
				"state=%d\n",dev->name,p_ch->claw_state);
#ifdef FUNCTRACE
			printk(KERN_INFO "%s:%s Exit on line %d\n",
				dev->name,__FUNCTION__,__LINE__);
#endif
			CLAW_DBF_TEXT(2,trace,"badIRQ");
                        return;
        }

}       /*   end of claw_irq_handler    */


/*-------------------------------------------------------------------*
*       claw_irq_tasklet                                             *
*                                                                    *
*--------------------------------------------------------------------*/
static void
claw_irq_tasklet ( unsigned long data )
{
	struct chbk * p_ch;
        struct net_device  *dev;
        struct claw_privbk *       privptr;

	p_ch = (struct chbk *) data;
        dev = (struct net_device *)p_ch->ndev;
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
#endif
#ifdef DEBUGMSG
        printk(KERN_INFO "%s: variable p_ch =\n",dev->name);
        dumpit((char *) p_ch, sizeof(struct chbk));
#endif
	CLAW_DBF_TEXT(4,trace,"IRQtask");

        privptr = (struct claw_privbk *) dev->priv;

#ifdef DEBUGMSG
        printk(KERN_INFO "%s: bh routine - state-%02x\n" ,
		dev->name, p_ch->claw_state);
#endif

        unpack_read(dev);
        clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
	CLAW_DBF_TEXT(4,trace,"TskletXt");
#ifdef FUNCTRACE
	printk(KERN_INFO "%s:%s Exit on line %d\n",
		dev->name,__FUNCTION__,__LINE__);
#endif
        return;
}       /*    end of claw_irq_bh    */

/*-------------------------------------------------------------------*
*       claw_release                                                 *
*                                                                    *
*--------------------------------------------------------------------*/
static int
claw_release(struct net_device *dev)
{
        int                rc;
        int                i;
        unsigned long      saveflags;
        unsigned long      parm;
        struct claw_privbk *privptr;
        DECLARE_WAITQUEUE(wait, current);
        struct ccwbk*             p_this_ccw;
        struct ccwbk*             p_buf;

	if (!dev)
                return 0;
        privptr = (struct claw_privbk *) dev->priv;
        if (!privptr)
                return 0;
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(4,trace,"release");
#ifdef DEBUGMSG
        printk(KERN_INFO "%s: variable dev =\n",dev->name);
        dumpit((char *) dev, sizeof(struct net_device));
	printk(KERN_INFO "Priv Buffalloc %d\n",privptr->buffs_alloc);
	printk(KERN_INFO "Priv p_buff_ccw = %p\n",&privptr->p_buff_ccw);
#endif
        privptr->release_pend=1;
        claw_setbit_busy(TB_STOP,dev);
        for ( i = 1; i >=0 ;  i--) {
                spin_lock_irqsave(
			get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
             /*   del_timer(&privptr->channel[READ].timer);  */
 		privptr->channel[i].claw_state = CLAW_STOP;
                privptr->channel[i].IO_active = 0;
                parm = (unsigned long) &privptr->channel[i];
		if (i == WRITE)
			claw_purge_skb_queue(
				&privptr->channel[WRITE].collect_queue);
                rc = ccw_device_halt (privptr->channel[i].cdev, parm);
	        if (privptr->system_validate_comp==0x00)  /* never opened? */
                   init_waitqueue_head(&privptr->channel[i].wait);
                add_wait_queue(&privptr->channel[i].wait, &wait);
                set_current_state(TASK_INTERRUPTIBLE);
	        spin_unlock_irqrestore(
			get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
	        schedule();
		set_current_state(TASK_RUNNING);
	        remove_wait_queue(&privptr->channel[i].wait, &wait);
	        if (rc != 0) {
                        ccw_check_return_code(privptr->channel[i].cdev, rc);
                }
        }
	if (privptr->pk_skb != NULL) {
		dev_kfree_skb_any(privptr->pk_skb);
		privptr->pk_skb = NULL;
	}
	if(privptr->buffs_alloc != 1) {
#ifdef FUNCTRACE
	printk(KERN_INFO "%s:%s Exit on line %d\n",
		dev->name,__FUNCTION__,__LINE__);
#endif
		CLAW_DBF_TEXT(4,trace,"none2fre");
		return 0;
	}
	CLAW_DBF_TEXT(4,trace,"freebufs");
	if (privptr->p_buff_ccw != NULL) {
        	free_pages((unsigned long)privptr->p_buff_ccw,
	        	(int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
	}
	CLAW_DBF_TEXT(4,trace,"freeread");
        if (privptr->p_env->read_size < PAGE_SIZE) {
	    if (privptr->p_buff_read != NULL) {
                free_pages((unsigned long)privptr->p_buff_read,
		      (int)pages_to_order_of_mag(privptr->p_buff_read_num));
		}
        }
        else {
                p_buf=privptr->p_read_active_first;
                while (p_buf!=NULL) {
                        free_pages((unsigned long)p_buf->p_buffer,
			     (int)pages_to_order_of_mag(
			     	privptr->p_buff_pages_perread ));
                        p_buf=p_buf->next;
                }
        }
	 CLAW_DBF_TEXT(4,trace,"freewrit");
        if (privptr->p_env->write_size < PAGE_SIZE ) {
                free_pages((unsigned long)privptr->p_buff_write,
		      (int)pages_to_order_of_mag(privptr->p_buff_write_num));
        }
        else {
                p_buf=privptr->p_write_active_first;
                while (p_buf!=NULL) {
                        free_pages((unsigned long)p_buf->p_buffer,
			      (int)pages_to_order_of_mag(
			      privptr->p_buff_pages_perwrite ));
                        p_buf=p_buf->next;
                }
        }
	 CLAW_DBF_TEXT(4,trace,"clearptr");
	privptr->buffs_alloc = 0;
        privptr->p_buff_ccw=NULL;
        privptr->p_buff_read=NULL;
        privptr->p_buff_write=NULL;
        privptr->system_validate_comp=0;
        privptr->release_pend=0;
        /*      Remove any writes that were pending and reset all reads   */
        p_this_ccw=privptr->p_read_active_first;
        while (p_this_ccw!=NULL) {
                p_this_ccw->header.length=0xffff;
                p_this_ccw->header.opcode=0xff;
                p_this_ccw->header.flag=0x00;
                p_this_ccw=p_this_ccw->next;
        }

        while (privptr->p_write_active_first!=NULL) {
                p_this_ccw=privptr->p_write_active_first;
                p_this_ccw->header.flag=CLAW_PENDING;
                privptr->p_write_active_first=p_this_ccw->next;
                p_this_ccw->next=privptr->p_write_free_chain;
                privptr->p_write_free_chain=p_this_ccw;
                ++privptr->write_free_count;
        }
        privptr->p_write_active_last=NULL;
        privptr->mtc_logical_link = -1;
        privptr->mtc_skipping = 1;
        privptr->mtc_offset=0;

        if (((privptr->channel[READ].last_dstat |
		privptr->channel[WRITE].last_dstat) &
		~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
                printk(KERN_WARNING "%s: channel problems during close - "
			"read: %02x -  write: %02x\n",
                dev->name,
		privptr->channel[READ].last_dstat,
		privptr->channel[WRITE].last_dstat);
		 CLAW_DBF_TEXT(2,trace,"badclose");
        }
#ifdef FUNCTRACE
	printk(KERN_INFO "%s:%s Exit on line %d\n",
		dev->name,__FUNCTION__,__LINE__);
#endif
	CLAW_DBF_TEXT(4,trace,"rlsexit");
        return 0;
}      /* end of claw_release     */



/*-------------------------------------------------------------------*
*       claw_write_retry                                             *
*                                                                    *
*--------------------------------------------------------------------*/

static void
claw_write_retry ( struct chbk *p_ch )
{

        struct net_device  *dev=p_ch->ndev;


#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
        printk(KERN_INFO "claw: variable p_ch =\n");
        dumpit((char *) p_ch, sizeof(struct chbk));
#endif
	CLAW_DBF_TEXT(4,trace,"w_retry");
        if (p_ch->claw_state == CLAW_STOP) {
#ifdef FUNCTRACE
		printk(KERN_INFO "%s:%s Exit on line %d\n",
			dev->name,__FUNCTION__,__LINE__);
#endif
        	return;
        }
#ifdef DEBUGMSG
        printk( KERN_INFO "%s:%s  state-%02x\n" ,
		dev->name,
		__FUNCTION__,
		p_ch->claw_state);
#endif
	claw_strt_out_IO( dev );
#ifdef FUNCTRACE
	printk(KERN_INFO "%s:%s Exit on line %d\n",
		dev->name,__FUNCTION__,__LINE__);
#endif
	CLAW_DBF_TEXT(4,trace,"rtry_xit");
        return;
}      /* end of claw_write_retry      */


/*-------------------------------------------------------------------*
*       claw_write_next                                              *
*                                                                    *
*--------------------------------------------------------------------*/

static void
claw_write_next ( struct chbk * p_ch )
{

        struct net_device  *dev;
        struct claw_privbk *privptr=NULL;
	struct sk_buff *pk_skb;
	int	rc;

#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter  \n",p_ch->ndev->name,__FUNCTION__);
        printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
        dumpit((char *) p_ch, sizeof(struct chbk));
#endif
	CLAW_DBF_TEXT(4,trace,"claw_wrt");
        if (p_ch->claw_state == CLAW_STOP)
                return;
        dev = (struct net_device *) p_ch->ndev;
	privptr = (struct claw_privbk *) dev->priv;
        claw_free_wrt_buf( dev );
	if ((privptr->write_free_count > 0) &&
	    !skb_queue_empty(&p_ch->collect_queue)) {
	  	pk_skb = claw_pack_skb(privptr);
		while (pk_skb != NULL) {
			rc = claw_hw_tx( pk_skb, dev,1);
			if (privptr->write_free_count > 0) {
	   			pk_skb = claw_pack_skb(privptr);
			} else
				pk_skb = NULL;
		}
	}
        if (privptr->p_write_active_first!=NULL) {
                claw_strt_out_IO(dev);
        }

#ifdef FUNCTRACE
	printk(KERN_INFO "%s:%s Exit on line %d\n",
		dev->name,__FUNCTION__,__LINE__);
#endif
        return;
}      /* end of claw_write_next      */

/*-------------------------------------------------------------------*
*                                                                    *
*       claw_timer                                                   *
*--------------------------------------------------------------------*/

static void
claw_timer ( struct chbk * p_ch )
{
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Entry\n",p_ch->ndev->name,__FUNCTION__);
        printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
        dumpit((char *) p_ch, sizeof(struct chbk));
#endif
	CLAW_DBF_TEXT(4,trace,"timer");
        p_ch->flag |= CLAW_TIMER;
        wake_up(&p_ch->wait);
#ifdef FUNCTRACE
	printk(KERN_INFO "%s:%s Exit on line %d\n",
		p_ch->ndev->name,__FUNCTION__,__LINE__);
#endif
        return;
}      /* end of claw_timer  */


/*
*
*       functions
*/


/*-------------------------------------------------------------------*
*                                                                    *
*     pages_to_order_of_mag                                          *
*                                                                    *
*    takes a number of pages from 1 to 512 and returns the           *
*    log(num_pages)/log(2) get_free_pages() needs a base 2 order     *
*    of magnitude get_free_pages() has an upper order of 9           *
*--------------------------------------------------------------------*/

static int inline
pages_to_order_of_mag(int num_of_pages)
{
	int	order_of_mag=1;		/* assume 2 pages */
	int	nump=2;
#ifdef FUNCTRACE
        printk(KERN_INFO "%s Enter pages = %d \n",__FUNCTION__,num_of_pages);
#endif
	CLAW_DBF_TEXT_(5,trace,"pages%d",num_of_pages);
	if (num_of_pages == 1)   {return 0; }  /* magnitude of 0 = 1 page */
	/* 512 pages = 2Meg on 4k page systems */
	if (num_of_pages >= 512) {return 9; }
	/* we have two or more pages order is at least 1 */
	for (nump=2 ;nump <= 512;nump*=2) {
	  if (num_of_pages <= nump)
		  break;
	  order_of_mag +=1;
	}
	if (order_of_mag > 9) { order_of_mag = 9; }  /* I know it's paranoid */
#ifdef FUNCTRACE
        printk(KERN_INFO "%s Exit on line %d, order = %d\n",
	__FUNCTION__,__LINE__, order_of_mag);
#endif
	CLAW_DBF_TEXT_(5,trace,"mag%d",order_of_mag);
	return order_of_mag;
}

/*-------------------------------------------------------------------*
*                                                                    *
*     add_claw_reads                                                 *
*                                                                    *
*--------------------------------------------------------------------*/
static int
add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
	struct ccwbk* p_last)
{
        struct claw_privbk *privptr;
        struct ccw1  temp_ccw;
        struct endccw * p_end;
#ifdef IOTRACE
        struct ccwbk*  p_buf;
#endif
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
#endif
#ifdef DEBUGMSG
        printk(KERN_INFO "dev\n");
        dumpit((char *) dev, sizeof(struct net_device));
        printk(KERN_INFO "p_first\n");
        dumpit((char *) p_first, sizeof(struct ccwbk));
        printk(KERN_INFO "p_last\n");
        dumpit((char *) p_last, sizeof(struct ccwbk));
#endif
	CLAW_DBF_TEXT(4,trace,"addreads");
        privptr = dev->priv;
        p_end = privptr->p_end_ccw;

        /* first CCW and last CCW contains a new set of read channel programs
        *       to apend the running channel programs
        */
        if ( p_first==NULL) {
#ifdef FUNCTRACE
		printk(KERN_INFO "%s:%s Exit on line %d\n",
			dev->name,__FUNCTION__,__LINE__);
#endif
		CLAW_DBF_TEXT(4,trace,"addexit");
                return 0;
        }

        /* set up ending CCW sequence for this segment */
        if (p_end->read1) {
                p_end->read1=0x00;    /*  second ending CCW is now active */
                /*      reset ending CCWs and setup TIC CCWs              */
                p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
                p_end->read2_nop2.flags  = CCW_FLAG_SLI | CCW_FLAG_SKIP;
                p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
                p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
                p_end->read2_nop2.cda=0;
                p_end->read2_nop2.count=1;
        }
        else {
                p_end->read1=0x01;  /* first ending CCW is now active */
                /*      reset ending CCWs and setup TIC CCWs          */
                p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
                p_end->read1_nop2.flags  = CCW_FLAG_SLI | CCW_FLAG_SKIP;
                p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
                p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
                p_end->read1_nop2.cda=0;
                p_end->read1_nop2.count=1;
        }

        if ( privptr-> p_read_active_first ==NULL ) {
#ifdef DEBUGMSG
                printk(KERN_INFO "%s:%s p_read_active_frist == NULL \n",
			dev->name,__FUNCTION__);
                printk(KERN_INFO "%s:%s Read active first/last changed \n",
			dev->name,__FUNCTION__);
#endif
                privptr-> p_read_active_first= p_first;  /*    set new first */
                privptr-> p_read_active_last = p_last;   /*    set new last  */
        }
        else {

#ifdef DEBUGMSG
                printk(KERN_INFO "%s:%s Read in progress \n",
		dev->name,__FUNCTION__);
#endif
                /* set up TIC ccw  */
                temp_ccw.cda= (__u32)__pa(&p_first->read);
                temp_ccw.count=0;
                temp_ccw.flags=0;
                temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;


                if (p_end->read1) {

               /* first set of CCW's is chained to the new read              */
               /* chain, so the second set is chained to the active chain.   */
               /* Therefore modify the second set to point to the new        */
               /* read chain set up TIC CCWs                                 */
               /* make sure we update the CCW so channel doesn't fetch it    */
               /* when it's only half done                                   */
                        memcpy( &p_end->read2_nop2, &temp_ccw ,
				sizeof(struct ccw1));
                        privptr->p_read_active_last->r_TIC_1.cda=
				(__u32)__pa(&p_first->read);
                        privptr->p_read_active_last->r_TIC_2.cda=
				(__u32)__pa(&p_first->read);
                }
                else {
                        /* make sure we update the CCW so channel doesn't   */
			/* fetch it when it is only half done               */
                        memcpy( &p_end->read1_nop2, &temp_ccw ,
				sizeof(struct ccw1));
                        privptr->p_read_active_last->r_TIC_1.cda=
				(__u32)__pa(&p_first->read);
                        privptr->p_read_active_last->r_TIC_2.cda=
				(__u32)__pa(&p_first->read);
                }
                /*      chain in new set of blocks                              */
                privptr->p_read_active_last->next = p_first;
                privptr->p_read_active_last=p_last;
        } /* end of if ( privptr-> p_read_active_first ==NULL)  */
#ifdef IOTRACE
        printk(KERN_INFO "%s:%s  dump p_last CCW BK \n",dev->name,__FUNCTION__);
        dumpit((char *)p_last, sizeof(struct ccwbk));
        printk(KERN_INFO "%s:%s  dump p_end CCW BK \n",dev->name,__FUNCTION__);
        dumpit((char *)p_end, sizeof(struct endccw));

        printk(KERN_INFO "%s:%s dump p_first CCW BK \n",dev->name,__FUNCTION__);
        dumpit((char *)p_first, sizeof(struct ccwbk));
        printk(KERN_INFO "%s:%s Dump Active CCW chain \n",
		dev->name,__FUNCTION__);
        p_buf=privptr->p_read_active_first;
        while (p_buf!=NULL) {
                dumpit((char *)p_buf, sizeof(struct ccwbk));
                p_buf=p_buf->next;
        }
#endif
#ifdef FUNCTRACE
	printk(KERN_INFO "%s:%s Exit on line %d\n",
		dev->name,__FUNCTION__,__LINE__);
#endif
	CLAW_DBF_TEXT(4,trace,"addexit");
        return 0;
}    /*     end of add_claw_reads   */

/*-------------------------------------------------------------------*
 *   ccw_check_return_code                                           *
 *                                                                   *
 *-------------------------------------------------------------------*/

static void inline
ccw_check_return_code(struct ccw_device *cdev, int return_code)
{
#ifdef FUNCTRACE
        printk(KERN_INFO "%s: %s() > enter  \n",
		cdev->dev.bus_id,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(4,trace,"ccwret");
#ifdef DEBUGMSG
        printk(KERN_INFO "variable cdev =\n");
        dumpit((char *) cdev, sizeof(struct ccw_device));
        printk(KERN_INFO "variable return_code = %d\n",return_code);
#endif
        if (return_code != 0) {
                switch (return_code) {
                        case -EBUSY:
                                printk(KERN_INFO "%s: Busy !\n",
					cdev->dev.bus_id);
                                break;
                        case -ENODEV:
                                printk(KERN_EMERG "%s: Missing device called "
					"for IO ENODEV\n", cdev->dev.bus_id);
                                break;
                        case -EIO:
                                printk(KERN_EMERG "%s: Status pending... EIO \n",
					cdev->dev.bus_id);
                                break;
			case -EINVAL:
                                printk(KERN_EMERG "%s: Invalid Dev State EINVAL \n",
					cdev->dev.bus_id);
                                break;
                        default:
                                printk(KERN_EMERG "%s: Unknown error in "
				 "Do_IO %d\n",cdev->dev.bus_id, return_code);
                }
        }
#ifdef FUNCTRACE
        printk(KERN_INFO "%s: %s() > exit on line %d\n",
		cdev->dev.bus_id,__FUNCTION__,__LINE__);
#endif
	CLAW_DBF_TEXT(4,trace,"ccwret");
}    /*    end of ccw_check_return_code   */

/*-------------------------------------------------------------------*
*       ccw_check_unit_check                                         *
*--------------------------------------------------------------------*/

static void inline
ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
{
	struct net_device *dev = p_ch->ndev;

#ifdef FUNCTRACE
        printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
#endif
#ifdef DEBUGMSG
        printk(KERN_INFO "%s: variable dev =\n",dev->name);
        dumpit((char *)dev, sizeof(struct net_device));
        printk(KERN_INFO "%s: variable sense =\n",dev->name);
        dumpit((char *)&sense, 2);
#endif
	CLAW_DBF_TEXT(4,trace,"unitchek");

        printk(KERN_INFO "%s: Unit Check with sense byte:0x%04x\n",
                dev->name, sense);

        if (sense & 0x40) {
                if (sense & 0x01) {
                        printk(KERN_WARNING "%s: Interface disconnect or "
				"Selective reset "
			       	"occurred (remote side)\n", dev->name);
                }
                else {
                        printk(KERN_WARNING "%s: System reset occured"
				" (remote side)\n", dev->name);
                }
        }
        else if (sense & 0x20) {
                if (sense & 0x04) {
                        printk(KERN_WARNING "%s: Data-streaming "
				"timeout)\n", dev->name);
                }
                else  {
                        printk(KERN_WARNING "%s: Data-transfer parity"
				" error\n", dev->name);
                }
        }
        else if (sense & 0x10) {
                if (sense & 0x20) {
                        printk(KERN_WARNING "%s: Hardware malfunction "
				"(remote side)\n", dev->name);
                }
                else {
                        printk(KERN_WARNING "%s: read-data parity error "
				"(remote side)\n", dev->name);
                }
        }

#ifdef FUNCTRACE
        printk(KERN_INFO "%s: %s() exit on line %d\n",
		dev->name,__FUNCTION__,__LINE__);
#endif
}   /*    end of ccw_check_unit_check    */



/*-------------------------------------------------------------------*
* Dump buffer format                                                 *
*                                                                    *
*--------------------------------------------------------------------*/
#ifdef DEBUG
static void
dumpit(char* buf, int len)
{

        __u32      ct, sw, rm, dup;
        char       *ptr, *rptr;
        char       tbuf[82], tdup[82];
#if (CONFIG_ARCH_S390X)
        char       addr[22];
#else
        char       addr[12];
#endif
        char       boff[12];
        char       bhex[82], duphex[82];
        char       basc[40];

        sw  = 0;
        rptr =ptr=buf;
        rm  = 16;
        duphex[0]  = 0x00;
        dup = 0;
        for ( ct=0; ct < len; ct++, ptr++, rptr++ )  {
                if (sw == 0) {
#if (CONFIG_ARCH_S390X)
                        sprintf(addr, "%16.16lX",(unsigned long)rptr);
#else
                        sprintf(addr, "%8.8X",(__u32)rptr);
#endif
                        sprintf(boff, "%4.4X", (__u32)ct);
                        bhex[0] = '\0';
                        basc[0] = '\0';
                }
                if ((sw == 4) || (sw == 12)) {
                        strcat(bhex, " ");
                }
                if (sw == 8) {
                        strcat(bhex, "  ");
                }
#if (CONFIG_ARCH_S390X)
                sprintf(tbuf,"%2.2lX", (unsigned long)*ptr);
#else
                sprintf(tbuf,"%2.2X", (__u32)*ptr);
#endif
                tbuf[2] = '\0';
                strcat(bhex, tbuf);
                if ((0!=isprint(*ptr)) && (*ptr >= 0x20)) {
                        basc[sw] = *ptr;
                }
                else {
                        basc[sw] = '.';
                }
                basc[sw+1] = '\0';
                sw++;
                rm--;
                if (sw==16) {
                        if ((strcmp(duphex, bhex)) !=0) {
                                if (dup !=0) {
					sprintf(tdup,"Duplicate as above to"
						" %s", addr);
                                        printk( KERN_INFO "                 "
						"   --- %s ---\n",tdup);
                                }
                                printk( KERN_INFO "   %s (+%s) : %s  [%s]\n",
					 addr, boff, bhex, basc);
                                dup = 0;
                                strcpy(duphex, bhex);
                        }
                        else {
                                dup++;
                        }
                        sw = 0;
                        rm = 16;
                }
        }  /* endfor */

        if (sw != 0) {
                for ( ; rm > 0; rm--, sw++ ) {
                        if ((sw==4) || (sw==12)) strcat(bhex, " ");
                        if (sw==8)               strcat(bhex, "  ");
                        strcat(bhex, "  ");
                        strcat(basc, " ");
                }
                if (dup !=0) {
                        sprintf(tdup,"Duplicate as above to %s", addr);
                        printk( KERN_INFO "                    --- %s ---\n",
				tdup);
                }
                printk( KERN_INFO "   %s (+%s) : %s  [%s]\n",
			addr, boff, bhex, basc);
        }
        else {
                if (dup >=1) {
                        sprintf(tdup,"Duplicate as above to %s", addr);
                        printk( KERN_INFO "                    --- %s ---\n",
				tdup);
                }
                if (dup !=0) {
                        printk( KERN_INFO "   %s (+%s) : %s  [%s]\n",
				addr, boff, bhex, basc);
                }
        }
        return;

}   /*   end of dumpit  */
#endif

/*-------------------------------------------------------------------*
*               find_link                                            *
*--------------------------------------------------------------------*/
static int
find_link(struct net_device *dev, char *host_name, char *ws_name )
{
	struct claw_privbk *privptr;
	struct claw_env *p_env;
	int    rc=0;

#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s > enter  \n",dev->name,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(2,setup,"findlink");
#ifdef DEBUGMSG
        printk(KERN_INFO "%s: variable dev = \n",dev->name);
        dumpit((char *) dev, sizeof(struct net_device));
        printk(KERN_INFO "%s: variable host_name = %s\n",dev->name, host_name);
        printk(KERN_INFO "%s: variable ws_name = %s\n",dev->name, ws_name);
#endif
        privptr=dev->priv;
        p_env=privptr->p_env;
	switch (p_env->packing)
	{
		case  PACKING_ASK:
			if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
			    (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
        	             rc = EINVAL;
			break;
		case  DO_PACKED:
		case  PACK_SEND:
			if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
			    (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
        	        	rc = EINVAL;
			break;
		default:
	       		if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
		    	    (memcmp(p_env->api_type , ws_name, 8)!=0))
        	        	rc = EINVAL;
			break;
	}

#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Exit on line %d\n",
		dev->name,__FUNCTION__,__LINE__);
#endif
        return 0;
}    /*    end of find_link    */

/*-------------------------------------------------------------------*
 *   claw_hw_tx                                                      *
 *                                                                   *
 *                                                                   *
 *-------------------------------------------------------------------*/

static int
claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
{
        int                             rc=0;
        struct claw_privbk 		*privptr;
        struct ccwbk           *p_this_ccw;
        struct ccwbk           *p_first_ccw;
        struct ccwbk           *p_last_ccw;
        __u32                           numBuffers;
        signed long                     len_of_data;
        unsigned long                   bytesInThisBuffer;
        unsigned char                   *pDataAddress;
        struct endccw                   *pEnd;
        struct ccw1                     tempCCW;
        struct chbk                     *p_ch;
	struct claw_env			*p_env;
        int                             lock;
	struct clawph			*pk_head;
	struct chbk			*ch;
#ifdef IOTRACE
        struct ccwbk                   *p_buf;
#endif
#ifdef FUNCTRACE
        printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(4,trace,"hw_tx");
#ifdef DEBUGMSG
        printk(KERN_INFO "%s: variable dev skb =\n",dev->name);
        dumpit((char *) skb, sizeof(struct sk_buff));
        printk(KERN_INFO "%s: variable dev =\n",dev->name);
        dumpit((char *) dev, sizeof(struct net_device));
        printk(KERN_INFO "%s: variable linkid = %ld\n",dev->name,linkid);
#endif
        privptr = (struct claw_privbk *) (dev->priv);
        p_ch=(struct chbk *)&privptr->channel[WRITE];
	p_env =privptr->p_env;
#ifdef IOTRACE
        printk(KERN_INFO "%s: %s() dump sk_buff  \n",dev->name,__FUNCTION__);
        dumpit((char *)skb ,sizeof(struct sk_buff));
#endif
	claw_free_wrt_buf(dev);	/* Clean up free chain if posible */
        /*  scan the write queue to free any completed write packets   */
        p_first_ccw=NULL;
        p_last_ccw=NULL;
	if ((p_env->packing >= PACK_SEND) &&
       	    (skb->cb[1] != 'P')) {
		skb_push(skb,sizeof(struct clawph));
		pk_head=(struct clawph *)skb->data;
		pk_head->len=skb->len-sizeof(struct clawph);
		if (pk_head->len%4)  {
			pk_head->len+= 4-(pk_head->len%4);
			skb_pad(skb,4-(pk_head->len%4));
			skb_put(skb,4-(pk_head->len%4));
		}
		if (p_env->packing == DO_PACKED)
			pk_head->link_num = linkid;
		else
			pk_head->link_num = 0;
		pk_head->flag = 0x00;
		skb_pad(skb,4);
		skb->cb[1] = 'P';
	}
        if (linkid == 0) {
        	if (claw_check_busy(dev)) {
                	if (privptr->write_free_count!=0) {
                                claw_clear_busy(dev);
                        }
                        else {
                                claw_strt_out_IO(dev );
                                claw_free_wrt_buf( dev );
                                if (privptr->write_free_count==0) {
#ifdef IOTRACE
                                	printk(KERN_INFO "%s: "
					   "(claw_check_busy) no free write "
					   "buffers\n", dev->name);
#endif
					ch = &privptr->channel[WRITE];
					atomic_inc(&skb->users);
					skb_queue_tail(&ch->collect_queue, skb);
                                	goto Done;
                                }
                                else {
                                	claw_clear_busy(dev);
                                }
                        }
                }
                /*  tx lock  */
                if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
#ifdef DEBUGMSG
                        printk(KERN_INFO "%s:  busy  (claw_test_and_setbit_"
				"busy)\n", dev->name);
#endif
			ch = &privptr->channel[WRITE];
			atomic_inc(&skb->users);
			skb_queue_tail(&ch->collect_queue, skb);
                        claw_strt_out_IO(dev );
                        rc=-EBUSY;
                        goto Done2;
                }
        }
        /*      See how many write buffers are required to hold this data */
        numBuffers= ( skb->len + privptr->p_env->write_size - 1) /
			( privptr->p_env->write_size);

        /*      If that number of buffers isn't available, give up for now */
        if (privptr->write_free_count < numBuffers ||
            privptr->p_write_free_chain == NULL ) {

                claw_setbit_busy(TB_NOBUFFER,dev);

#ifdef DEBUGMSG
                printk(KERN_INFO "%s:  busy  (claw_setbit_busy"
			"(TB_NOBUFFER))\n", dev->name);
                printk(KERN_INFO "       free_count: %d, numBuffers : %d\n",
			(int)privptr->write_free_count,(int) numBuffers );
#endif
		ch = &privptr->channel[WRITE];
		atomic_inc(&skb->users);
		skb_queue_tail(&ch->collect_queue, skb);
		CLAW_DBF_TEXT(2,trace,"clawbusy");
                goto Done2;
        }
        pDataAddress=skb->data;
        len_of_data=skb->len;

        while (len_of_data > 0) {
#ifdef DEBUGMSG
                printk(KERN_INFO "%s: %s() length-of-data is %ld \n",
			dev->name ,__FUNCTION__,len_of_data);
                dumpit((char *)pDataAddress ,64);
#endif
                p_this_ccw=privptr->p_write_free_chain;  /* get a block */
		if (p_this_ccw == NULL) { /* lost the race */
			ch = &privptr->channel[WRITE];
			atomic_inc(&skb->users);
			skb_queue_tail(&ch->collect_queue, skb);
			goto Done2;
		}
                privptr->p_write_free_chain=p_this_ccw->next;
                p_this_ccw->next=NULL;
                --privptr->write_free_count; /* -1 */
                bytesInThisBuffer=len_of_data;
                memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
                len_of_data-=bytesInThisBuffer;
                pDataAddress+=(unsigned long)bytesInThisBuffer;
                /*      setup write CCW         */
                p_this_ccw->write.cmd_code = (linkid * 8) +1;
                if (len_of_data>0) {
                        p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
                }
                p_this_ccw->write.count=bytesInThisBuffer;
                /*      now add to end of this chain    */
                if (p_first_ccw==NULL)    {
                        p_first_ccw=p_this_ccw;
                }
                if (p_last_ccw!=NULL) {
                        p_last_ccw->next=p_this_ccw;
                        /*      set up TIC ccws         */
                        p_last_ccw->w_TIC_1.cda=
				(__u32)__pa(&p_this_ccw->write);
                }
                p_last_ccw=p_this_ccw;      /* save new last block */
#ifdef IOTRACE
		printk(KERN_INFO "%s: %s() > CCW and Buffer %ld bytes long \n",
			dev->name,__FUNCTION__,bytesInThisBuffer);
                dumpit((char *)p_this_ccw, sizeof(struct ccwbk));
                dumpit((char *)p_this_ccw->p_buffer, 64);
#endif
        }

        /*      FirstCCW and LastCCW now contain a new set of write channel
        *       programs to append to the running channel program
        */

        if (p_first_ccw!=NULL) {
                /*      setup ending ccw sequence for this segment              */
                pEnd=privptr->p_end_ccw;
                if (pEnd->write1) {
                        pEnd->write1=0x00;   /* second end ccw is now active */
                        /*      set up Tic CCWs         */
                        p_last_ccw->w_TIC_1.cda=
				(__u32)__pa(&pEnd->write2_nop1);
                        pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
                        pEnd->write2_nop2.flags    =
				CCW_FLAG_SLI | CCW_FLAG_SKIP;
                        pEnd->write2_nop2.cda=0;
                        pEnd->write2_nop2.count=1;
                }
                else {  /*  end of if (pEnd->write1)*/
                        pEnd->write1=0x01;   /* first end ccw is now active */
                        /*      set up Tic CCWs         */
                        p_last_ccw->w_TIC_1.cda=
				(__u32)__pa(&pEnd->write1_nop1);
                        pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
                        pEnd->write1_nop2.flags    =
				CCW_FLAG_SLI | CCW_FLAG_SKIP;
                        pEnd->write1_nop2.cda=0;
                        pEnd->write1_nop2.count=1;
                }  /* end if if (pEnd->write1) */


                if (privptr->p_write_active_first==NULL ) {
                        privptr->p_write_active_first=p_first_ccw;
                        privptr->p_write_active_last=p_last_ccw;
                }
                else {

                        /*      set up Tic CCWs         */

                        tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
                        tempCCW.count=0;
                        tempCCW.flags=0;
                        tempCCW.cmd_code=CCW_CLAW_CMD_TIC;

                        if (pEnd->write1) {

                 /*
                 * first set of ending CCW's is chained to the new write
                 * chain, so the second set is chained to the active chain
                 * Therefore modify the second set to point the new write chain.
                 * make sure we update the CCW atomically
                 * so channel does not fetch it when it's only half done
                 */
                                memcpy( &pEnd->write2_nop2, &tempCCW ,
					sizeof(struct ccw1));
                                privptr->p_write_active_last->w_TIC_1.cda=
					(__u32)__pa(&p_first_ccw->write);
                        }
                        else {

                        /*make sure we update the CCW atomically
                         *so channel does not fetch it when it's only half done
                         */
                                memcpy(&pEnd->write1_nop2, &tempCCW ,
					sizeof(struct ccw1));
                                privptr->p_write_active_last->w_TIC_1.cda=
				        (__u32)__pa(&p_first_ccw->write);

                        } /* end if if (pEnd->write1) */

                        privptr->p_write_active_last->next=p_first_ccw;
                        privptr->p_write_active_last=p_last_ccw;
                }

        } /* endif (p_first_ccw!=NULL)  */


#ifdef IOTRACE
        printk(KERN_INFO "%s: %s() >  Dump Active CCW chain \n",
		dev->name,__FUNCTION__);
        p_buf=privptr->p_write_active_first;
        while (p_buf!=NULL) {
                dumpit((char *)p_buf, sizeof(struct ccwbk));
                p_buf=p_buf->next;
        }
        p_buf=(struct ccwbk*)privptr->p_end_ccw;
        dumpit((char *)p_buf, sizeof(struct endccw));
#endif
        dev_kfree_skb_any(skb);
	if (linkid==0) {
        	lock=LOCK_NO;
        }
        else  {
                lock=LOCK_YES;
        }
        claw_strt_out_IO(dev );
        /*      if write free count is zero , set NOBUFFER       */
#ifdef DEBUGMSG
        printk(KERN_INFO "%s: %s() > free_count is %d\n",
		dev->name,__FUNCTION__,
		(int) privptr->write_free_count );
#endif
	if (privptr->write_free_count==0) {
		claw_setbit_busy(TB_NOBUFFER,dev);
        }
Done2:
	claw_clearbit_busy(TB_TX,dev);
Done:
#ifdef FUNCTRACE
        printk(KERN_INFO "%s: %s() > exit on line %d, rc = %d \n",
		dev->name,__FUNCTION__,__LINE__, rc);
#endif
	return(rc);
}    /*    end of claw_hw_tx    */

/*-------------------------------------------------------------------*
*                                                                    *
*     init_ccw_bk                                                    *
*                                                                    *
*--------------------------------------------------------------------*/

static int
init_ccw_bk(struct net_device *dev)
{

        __u32   ccw_blocks_required;
        __u32   ccw_blocks_perpage;
        __u32   ccw_pages_required;
        __u32   claw_reads_perpage=1;
        __u32   claw_read_pages;
        __u32   claw_writes_perpage=1;
        __u32   claw_write_pages;
        void    *p_buff=NULL;
        struct ccwbk*p_free_chain;
	struct ccwbk*p_buf;
	struct ccwbk*p_last_CCWB;
	struct ccwbk*p_first_CCWB;
        struct endccw *p_endccw=NULL;
        addr_t  real_address;
        struct claw_privbk *privptr=dev->priv;
        struct clawh *pClawH=NULL;
        addr_t   real_TIC_address;
        int i,j;
#ifdef FUNCTRACE
        printk(KERN_INFO "%s: %s() enter  \n",dev->name,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(4,trace,"init_ccw");
#ifdef DEBUGMSG
        printk(KERN_INFO "%s: variable dev =\n",dev->name);
        dumpit((char *) dev, sizeof(struct net_device));
#endif

        /*  initialize  statistics field */
        privptr->active_link_ID=0;
        /*  initialize  ccwbk pointers  */
        privptr->p_write_free_chain=NULL;   /* pointer to free ccw chain*/
        privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
        privptr->p_write_active_last=NULL;  /* pointer to the last write ccw*/
        privptr->p_read_active_first=NULL;  /* pointer to the first read ccw*/
        privptr->p_read_active_last=NULL;   /* pointer to the last read ccw */
        privptr->p_end_ccw=NULL;            /* pointer to ending ccw        */
        privptr->p_claw_signal_blk=NULL;    /* pointer to signal block      */
	privptr->buffs_alloc = 0;
        memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
        memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
        /*  initialize  free write ccwbk counter  */
        privptr->write_free_count=0;  /* number of free bufs on write chain */
        p_last_CCWB = NULL;
        p_first_CCWB= NULL;
        /*
        *  We need 1 CCW block for each read buffer, 1 for each
        *  write buffer, plus 1 for ClawSignalBlock
        */
        ccw_blocks_required =
		privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
#ifdef DEBUGMSG
        printk(KERN_INFO "%s: %s() "
		"ccw_blocks_required=%d\n",
		dev->name,__FUNCTION__,
		ccw_blocks_required);
        printk(KERN_INFO "%s: %s() "
		"PAGE_SIZE=0x%x\n",
		dev->name,__FUNCTION__,
		(unsigned int)PAGE_SIZE);
        printk(KERN_INFO "%s: %s() > "
		"PAGE_MASK=0x%x\n",
		dev->name,__FUNCTION__,
		(unsigned int)PAGE_MASK);
#endif
        /*
        * compute number of CCW blocks that will fit in a page
        */
        ccw_blocks_perpage= PAGE_SIZE /  CCWBK_SIZE;
        ccw_pages_required=
		(ccw_blocks_required+ccw_blocks_perpage -1) /
			 ccw_blocks_perpage;

#ifdef DEBUGMSG
        printk(KERN_INFO "%s: %s() > ccw_blocks_perpage=%d\n",
		dev->name,__FUNCTION__,
		ccw_blocks_perpage);
        printk(KERN_INFO "%s: %s() > ccw_pages_required=%d\n",
		dev->name,__FUNCTION__,
		ccw_pages_required);
#endif
        /*
         *  read and write sizes are set by 2 constants in claw.h
	 *  4k and 32k.  Unpacked values other than 4k are not going to
	 * provide good performance. With packing buffers support 32k
	 * buffers are used.
         */
        if (privptr->p_env->read_size < PAGE_SIZE) {
            claw_reads_perpage= PAGE_SIZE / privptr->p_env->read_size;
            claw_read_pages= (privptr->p_env->read_buffers +
	    	claw_reads_perpage -1) / claw_reads_perpage;
         }
         else {       /* > or equal  */
            privptr->p_buff_pages_perread=
	    	(privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
            claw_read_pages=
	    	privptr->p_env->read_buffers * privptr->p_buff_pages_perread;
         }
        if (privptr->p_env->write_size < PAGE_SIZE) {
            claw_writes_perpage=
	    	PAGE_SIZE / privptr->p_env->write_size;
            claw_write_pages=
	    	(privptr->p_env->write_buffers + claw_writes_perpage -1) /
			claw_writes_perpage;

        }
        else {      /* >  or equal  */
            privptr->p_buff_pages_perwrite=
	    	 (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
            claw_write_pages=
	     	privptr->p_env->write_buffers * privptr->p_buff_pages_perwrite;
        }
#ifdef DEBUGMSG
        if (privptr->p_env->read_size < PAGE_SIZE) {
            printk(KERN_INFO "%s: %s() reads_perpage=%d\n",
	    	dev->name,__FUNCTION__,
		claw_reads_perpage);
        }
        else {
            printk(KERN_INFO "%s: %s() pages_perread=%d\n",
	    	dev->name,__FUNCTION__,
		privptr->p_buff_pages_perread);
        }
        printk(KERN_INFO "%s: %s() read_pages=%d\n",
		dev->name,__FUNCTION__,
		claw_read_pages);
        if (privptr->p_env->write_size < PAGE_SIZE) {
            printk(KERN_INFO "%s: %s() writes_perpage=%d\n",
	    	dev->name,__FUNCTION__,
		claw_writes_perpage);
        }
        else {
            printk(KERN_INFO "%s: %s() pages_perwrite=%d\n",
	    	dev->name,__FUNCTION__,
		privptr->p_buff_pages_perwrite);
        }
        printk(KERN_INFO "%s: %s() write_pages=%d\n",
		dev->name,__FUNCTION__,
		claw_write_pages);
#endif


        /*
        *               allocate ccw_pages_required
        */
        if (privptr->p_buff_ccw==NULL) {
                privptr->p_buff_ccw=
			(void *)__get_free_pages(__GFP_DMA,
		        (int)pages_to_order_of_mag(ccw_pages_required ));
                if (privptr->p_buff_ccw==NULL) {
                        printk(KERN_INFO "%s: %s()  "
				"__get_free_pages for CCWs failed : "
				"pages is %d\n",
                                dev->name,__FUNCTION__,
				ccw_pages_required );
#ifdef FUNCTRACE
                        printk(KERN_INFO "%s: %s() > "
				"exit on line %d, rc = ENOMEM\n",
				dev->name,__FUNCTION__,
				 __LINE__);
#endif
                        return -ENOMEM;
                }
                privptr->p_buff_ccw_num=ccw_pages_required;
        }
        memset(privptr->p_buff_ccw, 0x00,
		privptr->p_buff_ccw_num * PAGE_SIZE);

        /*
        *               obtain ending ccw block address
        *
        */
        privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
        real_address  = (__u32)__pa(privptr->p_end_ccw);
        /*                              Initialize ending CCW block       */
#ifdef DEBUGMSG
        printk(KERN_INFO "%s: %s() begin initialize ending CCW blocks\n",
		dev->name,__FUNCTION__);
#endif

        p_endccw=privptr->p_end_ccw;
        p_endccw->real=real_address;
        p_endccw->write1=0x00;
        p_endccw->read1=0x00;

        /*      write1_nop1                                     */
        p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
        p_endccw->write1_nop1.flags       = CCW_FLAG_SLI | CCW_FLAG_CC;
        p_endccw->write1_nop1.count       = 1;
        p_endccw->write1_nop1.cda         = 0;

        /*      write1_nop2                                     */
        p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
        p_endccw->write1_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
        p_endccw->write1_nop2.count      = 1;
        p_endccw->write1_nop2.cda        = 0;

        /*      write2_nop1                                     */
        p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
        p_endccw->write2_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
        p_endccw->write2_nop1.count        = 1;
        p_endccw->write2_nop1.cda          = 0;

        /*      write2_nop2                                     */
        p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
        p_endccw->write2_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
        p_endccw->write2_nop2.count        = 1;
        p_endccw->write2_nop2.cda          = 0;

        /*      read1_nop1                                      */
        p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
        p_endccw->read1_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
        p_endccw->read1_nop1.count        = 1;
        p_endccw->read1_nop1.cda          = 0;

        /*      read1_nop2                                      */
        p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
        p_endccw->read1_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
        p_endccw->read1_nop2.count        = 1;
        p_endccw->read1_nop2.cda          = 0;

        /*      read2_nop1                                      */
        p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
        p_endccw->read2_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
        p_endccw->read2_nop1.count        = 1;
        p_endccw->read2_nop1.cda          = 0;

        /*      read2_nop2                                      */
        p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
        p_endccw->read2_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
        p_endccw->read2_nop2.count        = 1;
        p_endccw->read2_nop2.cda          = 0;

#ifdef IOTRACE
        printk(KERN_INFO "%s: %s() dump claw ending CCW BK \n",
		dev->name,__FUNCTION__);
        dumpit((char *)p_endccw, sizeof(struct endccw));
#endif

        /*
        *                               Build a chain of CCWs
        *
        */

#ifdef DEBUGMSG
        printk(KERN_INFO "%s: %s()  Begin build a chain of CCW buffer \n",
		dev->name,__FUNCTION__);
#endif
        p_buff=privptr->p_buff_ccw;

        p_free_chain=NULL;
        for (i=0 ; i < ccw_pages_required; i++ ) {
                real_address  = (__u32)__pa(p_buff);
                p_buf=p_buff;
                for (j=0 ; j < ccw_blocks_perpage ; j++) {
                        p_buf->next  = p_free_chain;
                        p_free_chain = p_buf;
                        p_buf->real=(__u32)__pa(p_buf);
                        ++p_buf;
                }
                p_buff+=PAGE_SIZE;
        }
#ifdef DEBUGMSG
        printk(KERN_INFO "%s: %s() "
		"End build a chain of CCW buffer \n",
			dev->name,__FUNCTION__);
        p_buf=p_free_chain;
        while (p_buf!=NULL) {
                dumpit((char *)p_buf, sizeof(struct ccwbk));
                p_buf=p_buf->next;
        }
#endif

        /*
        *                               Initialize ClawSignalBlock
        *
        */
#ifdef DEBUGMSG
        printk(KERN_INFO "%s: %s() "
		"Begin initialize ClawSignalBlock \n",
		dev->name,__FUNCTION__);
#endif
        if (privptr->p_claw_signal_blk==NULL) {
                privptr->p_claw_signal_blk=p_free_chain;
                p_free_chain=p_free_chain->next;
                pClawH=(struct clawh *)privptr->p_claw_signal_blk;
                pClawH->length=0xffff;
                pClawH->opcode=0xff;
                pClawH->flag=CLAW_BUSY;
        }
#ifdef DEBUGMSG
        printk(KERN_INFO "%s: %s() >  End initialize "
	 	"ClawSignalBlock\n",
		dev->name,__FUNCTION__);
        dumpit((char *)privptr->p_claw_signal_blk, sizeof(struct ccwbk));
#endif

        /*
        *               allocate write_pages_required and add to free chain
        */
        if (privptr->p_buff_write==NULL) {
            if (privptr->p_env->write_size < PAGE_SIZE) {
                privptr->p_buff_write=
			(void *)__get_free_pages(__GFP_DMA,
			(int)pages_to_order_of_mag(claw_write_pages ));
                if (privptr->p_buff_write==NULL) {
                        printk(KERN_INFO "%s: %s() __get_free_pages for write"
				" bufs failed : get is for %d pages\n",
                                dev->name,__FUNCTION__,claw_write_pages );
                        free_pages((unsigned long)privptr->p_buff_ccw,
			   (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
                        privptr->p_buff_ccw=NULL;
#ifdef FUNCTRACE
                        printk(KERN_INFO "%s: %s() > exit on line %d,"
			 	"rc = ENOMEM\n",
				dev->name,__FUNCTION__,__LINE__);
#endif
                        return -ENOMEM;
                }
                /*
                *                               Build CLAW write free chain
                *
                */

                memset(privptr->p_buff_write, 0x00,
			ccw_pages_required * PAGE_SIZE);
#ifdef DEBUGMSG
                printk(KERN_INFO "%s: %s() Begin build claw write free "
			"chain \n",dev->name,__FUNCTION__);
#endif
                privptr->p_write_free_chain=NULL;

                p_buff=privptr->p_buff_write;

                for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
                        p_buf        = p_free_chain;      /*  get a CCW */
                        p_free_chain = p_buf->next;
                        p_buf->next  =privptr->p_write_free_chain;
                        privptr->p_write_free_chain = p_buf;
                        p_buf-> p_buffer	= (struct clawbuf *)p_buff;
                        p_buf-> write.cda       = (__u32)__pa(p_buff);
                        p_buf-> write.flags     = CCW_FLAG_SLI | CCW_FLAG_CC;
                        p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
                        p_buf-> w_read_FF.flags   = CCW_FLAG_SLI | CCW_FLAG_CC;
                        p_buf-> w_read_FF.count   = 1;
                        p_buf-> w_read_FF.cda     =
				(__u32)__pa(&p_buf-> header.flag);
                        p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
                        p_buf-> w_TIC_1.flags      = 0;
                        p_buf-> w_TIC_1.count      = 0;

                        if (((unsigned long)p_buff+privptr->p_env->write_size) >=
			   ((unsigned long)(p_buff+2*
				(privptr->p_env->write_size) -1) & PAGE_MASK)) {
                        p_buff= p_buff+privptr->p_env->write_size;
                        }
                }
           }
           else      /*  Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
           {
               privptr->p_write_free_chain=NULL;
               for (i = 0; i< privptr->p_env->write_buffers ; i++) {
                   p_buff=(void *)__get_free_pages(__GFP_DMA,
		        (int)pages_to_order_of_mag(
			privptr->p_buff_pages_perwrite) );
#ifdef IOTRACE
                   printk(KERN_INFO "%s:%s __get_free_pages "
		    "for writes buf: get for %d pages\n",
		    dev->name,__FUNCTION__,
		    privptr->p_buff_pages_perwrite);
#endif
                   if (p_buff==NULL) {
                        printk(KERN_INFO "%s:%s __get_free_pages"
			 	"for writes buf failed : get is for %d pages\n",
				dev->name,
				__FUNCTION__,
				privptr->p_buff_pages_perwrite );
                        free_pages((unsigned long)privptr->p_buff_ccw,
			      (int)pages_to_order_of_mag(
			      		privptr->p_buff_ccw_num));
                        privptr->p_buff_ccw=NULL;
			p_buf=privptr->p_buff_write;
                        while (p_buf!=NULL) {
                                free_pages((unsigned long)
					p_buf->p_buffer,
					(int)pages_to_order_of_mag(
					privptr->p_buff_pages_perwrite));
                                p_buf=p_buf->next;
                        }
#ifdef FUNCTRACE
                        printk(KERN_INFO "%s: %s exit on line %d, rc = ENOMEM\n",
			dev->name,
			__FUNCTION__,
			__LINE__);
#endif
                        return -ENOMEM;
                   }  /* Error on get_pages   */
                   memset(p_buff, 0x00, privptr->p_env->write_size );
                   p_buf         = p_free_chain;
                   p_free_chain  = p_buf->next;
                   p_buf->next   = privptr->p_write_free_chain;
                   privptr->p_write_free_chain = p_buf;
                   privptr->p_buff_write = p_buf;
                   p_buf->p_buffer=(struct clawbuf *)p_buff;
                   p_buf-> write.cda     = (__u32)__pa(p_buff);
                   p_buf-> write.flags   = CCW_FLAG_SLI | CCW_FLAG_CC;
                   p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
                   p_buf-> w_read_FF.flags    = CCW_FLAG_SLI | CCW_FLAG_CC;
                   p_buf-> w_read_FF.count    = 1;
                   p_buf-> w_read_FF.cda      =
			(__u32)__pa(&p_buf-> header.flag);
                   p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
                   p_buf-> w_TIC_1.flags   = 0;
                   p_buf-> w_TIC_1.count   = 0;
               }  /* for all write_buffers   */

           }    /* else buffers are PAGE_SIZE or bigger */

        }
        privptr->p_buff_write_num=claw_write_pages;
        privptr->write_free_count=privptr->p_env->write_buffers;


#ifdef DEBUGMSG
        printk(KERN_INFO "%s:%s  End build claw write free chain \n",
	dev->name,__FUNCTION__);
        p_buf=privptr->p_write_free_chain;
        while (p_buf!=NULL) {
                dumpit((char *)p_buf, sizeof(struct ccwbk));
                p_buf=p_buf->next;
        }
#endif
        /*
        *               allocate read_pages_required and chain to free chain
        */
        if (privptr->p_buff_read==NULL) {
            if (privptr->p_env->read_size < PAGE_SIZE)  {
                privptr->p_buff_read=
			(void *)__get_free_pages(__GFP_DMA,
			(int)pages_to_order_of_mag(claw_read_pages) );
                if (privptr->p_buff_read==NULL) {
                        printk(KERN_INFO "%s: %s() "
			 	"__get_free_pages for read buf failed : "
			 	"get is for %d pages\n",
                                dev->name,__FUNCTION__,claw_read_pages );
                        free_pages((unsigned long)privptr->p_buff_ccw,
				(int)pages_to_order_of_mag(
					privptr->p_buff_ccw_num));
			/* free the write pages size is < page size  */
                        free_pages((unsigned long)privptr->p_buff_write,
				(int)pages_to_order_of_mag(
				privptr->p_buff_write_num));
                        privptr->p_buff_ccw=NULL;
                        privptr->p_buff_write=NULL;
#ifdef FUNCTRACE
                        printk(KERN_INFO "%s: %s() > exit on line %d, rc ="
				" ENOMEM\n",dev->name,__FUNCTION__,__LINE__);
#endif
                        return -ENOMEM;
                }
                memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
                privptr->p_buff_read_num=claw_read_pages;
                /*
                *                               Build CLAW read free chain
                *
                */
#ifdef DEBUGMSG
                printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
			dev->name,__FUNCTION__);
#endif
                p_buff=privptr->p_buff_read;
                for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
                        p_buf        = p_free_chain;
                        p_free_chain = p_buf->next;

                        if (p_last_CCWB==NULL) {
                                p_buf->next=NULL;
                                real_TIC_address=0;
                                p_last_CCWB=p_buf;
                        }
                        else {
                                p_buf->next=p_first_CCWB;
                                real_TIC_address=
				(__u32)__pa(&p_first_CCWB -> read );
                        }

                        p_first_CCWB=p_buf;

                        p_buf->p_buffer=(struct clawbuf *)p_buff;
                        /*  initialize read command */
                        p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
                        p_buf-> read.cda = (__u32)__pa(p_buff);
                        p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
                        p_buf-> read.count       = privptr->p_env->read_size;

                        /*  initialize read_h command */
                        p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
                        p_buf-> read_h.cda =
				(__u32)__pa(&(p_buf->header));
                        p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
                        p_buf-> read_h.count      = sizeof(struct clawh);

                        /*  initialize Signal command */
                        p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
                        p_buf-> signal.cda =
				(__u32)__pa(&(pClawH->flag));
                        p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
                        p_buf-> signal.count     = 1;

                        /*  initialize r_TIC_1 command */
                        p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
                        p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
                        p_buf-> r_TIC_1.flags = 0;
                        p_buf-> r_TIC_1.count      = 0;

                        /*  initialize r_read_FF command */
                        p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
                        p_buf-> r_read_FF.cda =
				(__u32)__pa(&(pClawH->flag));
                        p_buf-> r_read_FF.flags =
				CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
                        p_buf-> r_read_FF.count    = 1;

                        /*    initialize r_TIC_2          */
                        memcpy(&p_buf->r_TIC_2,
				&p_buf->r_TIC_1, sizeof(struct ccw1));

                        /*     initialize Header     */
                        p_buf->header.length=0xffff;
                        p_buf->header.opcode=0xff;
                        p_buf->header.flag=CLAW_PENDING;

                        if (((unsigned long)p_buff+privptr->p_env->read_size) >=
				((unsigned long)(p_buff+2*(privptr->p_env->read_size) -1)
				 & PAGE_MASK) ) {
                                p_buff= p_buff+privptr->p_env->read_size;
                        }
                        else {
                                p_buff=
				(void *)((unsigned long)
					(p_buff+2*(privptr->p_env->read_size) -1)
					 & PAGE_MASK) ;
                        }
                }   /* for read_buffers   */
          }         /* read_size < PAGE_SIZE  */
          else {  /* read Size >= PAGE_SIZE  */

#ifdef DEBUGMSG
        printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
		dev->name,__FUNCTION__);
#endif
                for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
                        p_buff = (void *)__get_free_pages(__GFP_DMA,
				(int)pages_to_order_of_mag(privptr->p_buff_pages_perread) );
                        if (p_buff==NULL) {
                                printk(KERN_INFO "%s: %s() __get_free_pages for read "
					"buf failed : get is for %d pages\n",
					dev->name,__FUNCTION__,
                                        privptr->p_buff_pages_perread );
                                free_pages((unsigned long)privptr->p_buff_ccw,
					(int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
				/* free the write pages  */
	                        p_buf=privptr->p_buff_write;
                                while (p_buf!=NULL) {
                                        free_pages((unsigned long)p_buf->p_buffer,
						(int)pages_to_order_of_mag(
						privptr->p_buff_pages_perwrite ));
                                        p_buf=p_buf->next;
                                }
				/* free any read pages already alloc  */
	                        p_buf=privptr->p_buff_read;
                                while (p_buf!=NULL) {
                                        free_pages((unsigned long)p_buf->p_buffer,
						(int)pages_to_order_of_mag(
						privptr->p_buff_pages_perread ));
                                        p_buf=p_buf->next;
                                }
                                privptr->p_buff_ccw=NULL;
                                privptr->p_buff_write=NULL;
#ifdef FUNCTRACE
                                printk(KERN_INFO "%s: %s() exit on line %d, rc = ENOMEM\n",
					dev->name,__FUNCTION__,
					__LINE__);
#endif
                                return -ENOMEM;
                        }
                        memset(p_buff, 0x00, privptr->p_env->read_size);
                        p_buf        = p_free_chain;
                        privptr->p_buff_read = p_buf;
                        p_free_chain = p_buf->next;

                        if (p_last_CCWB==NULL) {
                                p_buf->next=NULL;
                                real_TIC_address=0;
                                p_last_CCWB=p_buf;
                        }
                        else {
                                p_buf->next=p_first_CCWB;
                                real_TIC_address=
					(addr_t)__pa(
						&p_first_CCWB -> read );
                        }

                        p_first_CCWB=p_buf;
				/* save buff address */
                        p_buf->p_buffer=(struct clawbuf *)p_buff;
                        /*  initialize read command */
                        p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
                        p_buf-> read.cda = (__u32)__pa(p_buff);
                        p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
                        p_buf-> read.count       = privptr->p_env->read_size;

                        /*  initialize read_h command */
                        p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
                        p_buf-> read_h.cda =
				(__u32)__pa(&(p_buf->header));
                        p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
                        p_buf-> read_h.count      = sizeof(struct clawh);

                        /*  initialize Signal command */
                        p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
                        p_buf-> signal.cda =
				(__u32)__pa(&(pClawH->flag));
                        p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
                        p_buf-> signal.count     = 1;

                        /*  initialize r_TIC_1 command */
                        p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
                        p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
                        p_buf-> r_TIC_1.flags = 0;
                        p_buf-> r_TIC_1.count      = 0;

                        /*  initialize r_read_FF command */
                        p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
                        p_buf-> r_read_FF.cda =
				(__u32)__pa(&(pClawH->flag));
                        p_buf-> r_read_FF.flags =
				CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
                        p_buf-> r_read_FF.count    = 1;

                        /*    initialize r_TIC_2          */
                        memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
				sizeof(struct ccw1));

                        /*     initialize Header     */
                        p_buf->header.length=0xffff;
                        p_buf->header.opcode=0xff;
                        p_buf->header.flag=CLAW_PENDING;

                }    /* For read_buffers   */
          }     /*  read_size >= PAGE_SIZE   */
        }       /*  pBuffread = NULL */
#ifdef DEBUGMSG
        printk(KERN_INFO "%s: %s() >  End build claw read free chain \n",
		dev->name,__FUNCTION__);
        p_buf=p_first_CCWB;
        while (p_buf!=NULL) {
                dumpit((char *)p_buf, sizeof(struct ccwbk));
                p_buf=p_buf->next;
        }

#endif
        add_claw_reads( dev  ,p_first_CCWB , p_last_CCWB);
	privptr->buffs_alloc = 1;
#ifdef FUNCTRACE
        printk(KERN_INFO "%s: %s() exit on line %d\n",
		dev->name,__FUNCTION__,__LINE__);
#endif
        return 0;
}    /*    end of init_ccw_bk */

/*-------------------------------------------------------------------*
*                                                                    *
*       probe_error                                                  *
*                                                                    *
*--------------------------------------------------------------------*/

static void
probe_error( struct ccwgroup_device *cgdev)
{
  struct claw_privbk *privptr;
#ifdef FUNCTRACE
        printk(KERN_INFO "%s enter  \n",__FUNCTION__);
#endif
	CLAW_DBF_TEXT(4,trace,"proberr");
#ifdef DEBUGMSG
        printk(KERN_INFO "%s variable cgdev =\n",__FUNCTION__);
        dumpit((char *) cgdev, sizeof(struct ccwgroup_device));
#endif
        privptr=(struct claw_privbk *)cgdev->dev.driver_data;
	if (privptr!=NULL) {
		kfree(privptr->p_env);
		privptr->p_env=NULL;
                kfree(privptr->p_mtc_envelope);
               	privptr->p_mtc_envelope=NULL;
                kfree(privptr);
                privptr=NULL;
        }
#ifdef FUNCTRACE
        printk(KERN_INFO "%s > exit on line %d\n",
		 __FUNCTION__,__LINE__);
#endif

        return;
}    /*    probe_error    */



/*-------------------------------------------------------------------*
*    claw_process_control                                            *
*                                                                    *
*                                                                    *
*--------------------------------------------------------------------*/

static int
claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
{

        struct clawbuf *p_buf;
        struct clawctl  ctlbk;
        struct clawctl *p_ctlbk;
        char    temp_host_name[8];
        char    temp_ws_name[8];
        struct claw_privbk *privptr;
        struct claw_env *p_env;
        struct sysval *p_sysval;
        struct conncmd *p_connect=NULL;
        int rc;
        struct chbk *p_ch = NULL;
#ifdef FUNCTRACE
        printk(KERN_INFO "%s: %s() > enter  \n",
		dev->name,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(2,setup,"clw_cntl");
#ifdef DEBUGMSG
        printk(KERN_INFO "%s: variable dev =\n",dev->name);
        dumpit((char *) dev, sizeof(struct net_device));
        printk(KERN_INFO "%s: variable p_ccw =\n",dev->name);
        dumpit((char *) p_ccw, sizeof(struct ccwbk *));
#endif
        udelay(1000);  /* Wait a ms for the control packets to
			*catch up to each other */
        privptr=dev->priv;
        p_env=privptr->p_env;
	memcpy( &temp_host_name, p_env->host_name, 8);
        memcpy( &temp_ws_name, p_env->adapter_name , 8);
        printk(KERN_INFO "%s: CLAW device %.8s: "
		"Received Control Packet\n",
		dev->name, temp_ws_name);
        if (privptr->release_pend==1) {
#ifdef FUNCTRACE
                printk(KERN_INFO "%s: %s() > "
			"exit on line %d, rc=0\n",
			dev->name,__FUNCTION__,__LINE__);
#endif
                return 0;
        }
        p_buf=p_ccw->p_buffer;
        p_ctlbk=&ctlbk;
	if (p_env->packing == DO_PACKED) { /* packing in progress?*/
		memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
	} else {
		memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
	}
#ifdef IOTRACE
        printk(KERN_INFO "%s: dump claw control data inbound\n",dev->name);
        dumpit((char *)p_ctlbk, sizeof(struct clawctl));
#endif
        switch (p_ctlbk->command)
        {
                case SYSTEM_VALIDATE_REQUEST:
                        if (p_ctlbk->version!=CLAW_VERSION_ID) {
                                claw_snd_sys_validate_rsp(dev, p_ctlbk,
					CLAW_RC_WRONG_VERSION );
                                printk("%s: %d is wrong version id. "
					"Expected %d\n",
					dev->name, p_ctlbk->version,
                                        CLAW_VERSION_ID);
                        }
                        p_sysval=(struct sysval *)&(p_ctlbk->data);
			printk( "%s: Recv Sys Validate Request: "
				"Vers=%d,link_id=%d,Corr=%d,WS name=%."
				"8s,Host name=%.8s\n",
                                dev->name, p_ctlbk->version,
				p_ctlbk->linkid,
				p_ctlbk->correlator,
				p_sysval->WS_name,
                                p_sysval->host_name);
                        if (0!=memcmp(temp_host_name,p_sysval->host_name,8)) {
                                claw_snd_sys_validate_rsp(dev, p_ctlbk,
					CLAW_RC_NAME_MISMATCH );
				CLAW_DBF_TEXT(2,setup,"HSTBAD");
				CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->host_name);
				CLAW_DBF_TEXT_(2,setup,"%s",temp_host_name);
                                printk(KERN_INFO "%s:  Host name mismatch\n",
					dev->name);
				printk(KERN_INFO "%s: Received :%s: "
					"expected :%s: \n",
					dev->name,
					p_sysval->host_name,
					temp_host_name);
                        }
                        if (0!=memcmp(temp_ws_name,p_sysval->WS_name,8)) {
                                claw_snd_sys_validate_rsp(dev, p_ctlbk,
					CLAW_RC_NAME_MISMATCH );
				CLAW_DBF_TEXT(2,setup,"WSNBAD");
                                CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->WS_name);
                                CLAW_DBF_TEXT_(2,setup,"%s",temp_ws_name);
                                printk(KERN_INFO "%s: WS name mismatch\n",
					dev->name);
				 printk(KERN_INFO "%s: Received :%s: "
                                        "expected :%s: \n",
                                        dev->name,
                                        p_sysval->WS_name,
					temp_ws_name);
                        }
                        if (( p_sysval->write_frame_size < p_env->write_size) &&
			   ( p_env->packing == 0)) {
                                claw_snd_sys_validate_rsp(dev, p_ctlbk,
					CLAW_RC_HOST_RCV_TOO_SMALL );
                                printk(KERN_INFO "%s: host write size is too "
					"small\n", dev->name);
				CLAW_DBF_TEXT(2,setup,"wrtszbad");
                        }
                        if (( p_sysval->read_frame_size < p_env->read_size) &&
			   ( p_env->packing == 0)) {
                                claw_snd_sys_validate_rsp(dev, p_ctlbk,
					CLAW_RC_HOST_RCV_TOO_SMALL );
                                printk(KERN_INFO "%s: host read size is too "
					"small\n", dev->name);
				CLAW_DBF_TEXT(2,setup,"rdsizbad");
                        }
                        claw_snd_sys_validate_rsp(dev, p_ctlbk, 0 );
                        printk("%s: CLAW device %.8s: System validate"
				" completed.\n",dev->name, temp_ws_name);
			printk("%s: sys Validate Rsize:%d Wsize:%d\n",dev->name,
				p_sysval->read_frame_size,p_sysval->write_frame_size);
                        privptr->system_validate_comp=1;
                	if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
				p_env->packing = PACKING_ASK;
			}
                        claw_strt_conn_req(dev);
                        break;

                case SYSTEM_VALIDATE_RESPONSE:
			p_sysval=(struct sysval *)&(p_ctlbk->data);
			printk("%s: Recv Sys Validate Resp: Vers=%d,Corr=%d,RC=%d,"
				"WS name=%.8s,Host name=%.8s\n",
                        	dev->name,
                        	p_ctlbk->version,
                        	p_ctlbk->correlator,
                        	p_ctlbk->rc,
                        	p_sysval->WS_name,
                        	p_sysval->host_name);
                        switch (p_ctlbk->rc)
                        {
                                case 0:
                                        printk(KERN_INFO "%s: CLAW device "
						"%.8s: System validate "
						"completed.\n",
                                                dev->name, temp_ws_name);
					if (privptr->system_validate_comp == 0)
	                                        claw_strt_conn_req(dev);
					privptr->system_validate_comp=1;
                                        break;
                                case CLAW_RC_NAME_MISMATCH:
                                        printk(KERN_INFO "%s: Sys Validate "
						"Resp : Host, WS name is "
						"mismatch\n",
                                                dev->name);
                                        break;
                                case CLAW_RC_WRONG_VERSION:
                                        printk(KERN_INFO "%s: Sys Validate "
						"Resp : Wrong version\n",
						dev->name);
                                        break;
                                case CLAW_RC_HOST_RCV_TOO_SMALL:
                                        printk(KERN_INFO "%s: Sys Validate "
						"Resp : bad frame size\n",
						dev->name);
                                        break;
                                default:
                                        printk(KERN_INFO "%s: Sys Validate "
						"error code=%d \n",
						 dev->name, p_ctlbk->rc );
                                        break;
                        }
                        break;

                case CONNECTION_REQUEST:
                        p_connect=(struct conncmd *)&(p_ctlbk->data);
                        printk(KERN_INFO "%s: Recv Conn Req: Vers=%d,link_id=%d,"
				"Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
                        	dev->name,
	                        p_ctlbk->version,
        	                p_ctlbk->linkid,
                	        p_ctlbk->correlator,
                        	p_connect->host_name,
                      		p_connect->WS_name);
                        if (privptr->active_link_ID!=0 ) {
                                claw_snd_disc(dev, p_ctlbk);
                                printk(KERN_INFO "%s: Conn Req error : "
					"already logical link is active \n",
					dev->name);
                        }
                        if (p_ctlbk->linkid!=1 ) {
                                claw_snd_disc(dev, p_ctlbk);
                                printk(KERN_INFO "%s: Conn Req error : "
					"req logical link id is not 1\n",
					dev->name);
                        }
                        rc=find_link(dev,
				p_connect->host_name, p_connect->WS_name);
                        if (rc!=0) {
                                claw_snd_disc(dev, p_ctlbk);
                                printk(KERN_INFO "%s: Conn Req error : "
					"req appl name does not match\n",
					 dev->name);
                        }
                        claw_send_control(dev,
				CONNECTION_CONFIRM, p_ctlbk->linkid,
				p_ctlbk->correlator,
				0, p_connect->host_name,
                                p_connect->WS_name);
			if (p_env->packing == PACKING_ASK) {
				printk("%s: Now Pack ask\n",dev->name);
				p_env->packing = PACK_SEND;
				claw_snd_conn_req(dev,0);
			}
                        printk(KERN_INFO "%s: CLAW device %.8s: Connection "
				"completed link_id=%d.\n",
				dev->name, temp_ws_name,
                                p_ctlbk->linkid);
                        privptr->active_link_ID=p_ctlbk->linkid;
                        p_ch=&privptr->channel[WRITE];
                        wake_up(&p_ch->wait);  /* wake up claw_open ( WRITE) */
                        break;
                case CONNECTION_RESPONSE:
                        p_connect=(struct conncmd *)&(p_ctlbk->data);
                        printk(KERN_INFO "%s: Revc Conn Resp: Vers=%d,link_id=%d,"
				"Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
                                dev->name,
				p_ctlbk->version,
				p_ctlbk->linkid,
				p_ctlbk->correlator,
				p_ctlbk->rc,
				p_connect->host_name,
                                p_connect->WS_name);

                        if (p_ctlbk->rc !=0 ) {
                                printk(KERN_INFO "%s: Conn Resp error: rc=%d \n",
					dev->name, p_ctlbk->rc);
                                return 1;
                        }
                        rc=find_link(dev,
				p_connect->host_name, p_connect->WS_name);
                        if (rc!=0) {
                                claw_snd_disc(dev, p_ctlbk);
                                printk(KERN_INFO "%s: Conn Resp error: "
					"req appl name does not match\n",
					 dev->name);
                        }
			/* should be until CONNECTION_CONFIRM */
                        privptr->active_link_ID =  - (p_ctlbk->linkid);
                        break;
                case CONNECTION_CONFIRM:
                        p_connect=(struct conncmd *)&(p_ctlbk->data);
                        printk(KERN_INFO "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
				"Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
                        dev->name,
                        p_ctlbk->version,
                        p_ctlbk->linkid,
                        p_ctlbk->correlator,
                        p_connect->host_name,
                        p_connect->WS_name);
                        if (p_ctlbk->linkid== -(privptr->active_link_ID)) {
                                privptr->active_link_ID=p_ctlbk->linkid;
				if (p_env->packing > PACKING_ASK) {
					printk(KERN_INFO "%s: Confirmed Now packing\n",dev->name);
					p_env->packing = DO_PACKED;
					}
				p_ch=&privptr->channel[WRITE];
                                wake_up(&p_ch->wait);
                        }
                        else {
                                printk(KERN_INFO "%s: Conn confirm: "
					"unexpected linkid=%d \n",
					dev->name, p_ctlbk->linkid);
                                claw_snd_disc(dev, p_ctlbk);
                        }
                        break;
                case DISCONNECT:
                        printk(KERN_INFO "%s: Disconnect: "
				"Vers=%d,link_id=%d,Corr=%d\n",
				dev->name, p_ctlbk->version,
                                p_ctlbk->linkid, p_ctlbk->correlator);
			if ((p_ctlbk->linkid == 2) &&
			    (p_env->packing == PACK_SEND)) {
				privptr->active_link_ID = 1;
				p_env->packing = DO_PACKED;
			}
			else
	                        privptr->active_link_ID=0;
                        break;
                case CLAW_ERROR:
                        printk(KERN_INFO "%s: CLAW ERROR detected\n",
				dev->name);
                        break;
                default:
                        printk(KERN_INFO "%s:  Unexpected command code=%d \n",
				dev->name,  p_ctlbk->command);
                        break;
        }

#ifdef FUNCTRACE
        printk(KERN_INFO "%s: %s() exit on line %d, rc = 0\n",
		dev->name,__FUNCTION__,__LINE__);
#endif

        return 0;
}   /*    end of claw_process_control    */


/*-------------------------------------------------------------------*
*               claw_send_control                                    *
*                                                                    *
*--------------------------------------------------------------------*/

static int
claw_send_control(struct net_device *dev, __u8 type, __u8 link,
	 __u8 correlator, __u8 rc, char *local_name, char *remote_name)
{
        struct claw_privbk 		*privptr;
        struct clawctl                  *p_ctl;
        struct sysval                   *p_sysval;
        struct conncmd                  *p_connect;
        struct sk_buff 			*skb;

#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s > enter  \n",dev->name,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(2,setup,"sndcntl");
#ifdef DEBUGMSG
	printk(KERN_INFO "%s: Sending Control Packet \n",dev->name);
        printk(KERN_INFO "%s: variable type = 0x%X, link = "
		"%d, correlator = %d, rc = %d\n",
                dev->name,type, link, correlator, rc);
        printk(KERN_INFO "%s: variable local_name = %s, "
		"remote_name = %s\n",dev->name, local_name, remote_name);
#endif
        privptr=dev->priv;
        p_ctl=(struct clawctl *)&privptr->ctl_bk;

        p_ctl->command=type;
        p_ctl->version=CLAW_VERSION_ID;
        p_ctl->linkid=link;
        p_ctl->correlator=correlator;
        p_ctl->rc=rc;

        p_sysval=(struct sysval *)&p_ctl->data;
        p_connect=(struct conncmd *)&p_ctl->data;

        switch (p_ctl->command) {
                case SYSTEM_VALIDATE_REQUEST:
                case SYSTEM_VALIDATE_RESPONSE:
                        memcpy(&p_sysval->host_name, local_name, 8);
                        memcpy(&p_sysval->WS_name, remote_name, 8);
			if (privptr->p_env->packing > 0) {
                        	p_sysval->read_frame_size=DEF_PACK_BUFSIZE;
	                        p_sysval->write_frame_size=DEF_PACK_BUFSIZE;
			} else {
				/* how big is the piggest group of packets */
				p_sysval->read_frame_size=privptr->p_env->read_size;
	                        p_sysval->write_frame_size=privptr->p_env->write_size;
			}
                        memset(&p_sysval->reserved, 0x00, 4);
                        break;
                case CONNECTION_REQUEST:
                case CONNECTION_RESPONSE:
                case CONNECTION_CONFIRM:
                case DISCONNECT:
                        memcpy(&p_sysval->host_name, local_name, 8);
                        memcpy(&p_sysval->WS_name, remote_name, 8);
			if (privptr->p_env->packing > 0) {
			/* How big is the biggest packet */
				p_connect->reserved1[0]=CLAW_FRAME_SIZE;
                        	p_connect->reserved1[1]=CLAW_FRAME_SIZE;
			} else {
	                        memset(&p_connect->reserved1, 0x00, 4);
        	                memset(&p_connect->reserved2, 0x00, 4);
			}
                        break;
                default:
                        break;
        }

        /*      write Control Record to the device                   */


        skb = dev_alloc_skb(sizeof(struct clawctl));
        if (!skb) {
                printk(  "%s:%s low on mem, returning...\n",
			dev->name,__FUNCTION__);
#ifdef DEBUG
                printk(KERN_INFO "%s:%s Exit, rc = ENOMEM\n",
			dev->name,__FUNCTION__);
#endif
                return -ENOMEM;
        }
	memcpy(skb_put(skb, sizeof(struct clawctl)),
		p_ctl, sizeof(struct clawctl));
#ifdef IOTRACE
	 printk(KERN_INFO "%s: outbnd claw cntl data \n",dev->name);
        dumpit((char *)p_ctl,sizeof(struct clawctl));
#endif
	if (privptr->p_env->packing >= PACK_SEND)
		claw_hw_tx(skb, dev, 1);
	else
        	claw_hw_tx(skb, dev, 0);
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Exit on line %d\n",
		dev->name,__FUNCTION__,__LINE__);
#endif

        return 0;
}  /*   end of claw_send_control  */

/*-------------------------------------------------------------------*
*               claw_snd_conn_req                                    *
*                                                                    *
*--------------------------------------------------------------------*/
static int
claw_snd_conn_req(struct net_device *dev, __u8 link)
{
        int                rc;
        struct claw_privbk *privptr=dev->priv;
        struct clawctl 	   *p_ctl;

#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(2,setup,"snd_conn");
#ifdef  DEBUGMSG
        printk(KERN_INFO "%s: variable link = %X, dev =\n",dev->name, link);
        dumpit((char *) dev, sizeof(struct net_device));
#endif
	rc = 1;
        p_ctl=(struct clawctl *)&privptr->ctl_bk;
	p_ctl->linkid = link;
        if ( privptr->system_validate_comp==0x00 ) {
#ifdef FUNCTRACE
                printk(KERN_INFO "%s:%s Exit on line %d, rc = 1\n",
			dev->name,__FUNCTION__,__LINE__);
#endif
                return rc;
        }
	if (privptr->p_env->packing == PACKING_ASK )
		rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
        		WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
	if (privptr->p_env->packing == PACK_SEND)  {
		rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
        		WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
	}
	if (privptr->p_env->packing == 0)
        	rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
       			HOST_APPL_NAME, privptr->p_env->api_type);
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
		dev->name,__FUNCTION__,__LINE__, rc);
#endif
        return rc;

}  /*  end of claw_snd_conn_req */


/*-------------------------------------------------------------------*
*               claw_snd_disc                                        *
*                                                                    *
*--------------------------------------------------------------------*/

static int
claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
{
        int rc;
        struct conncmd *  p_connect;

#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(2,setup,"snd_dsc");
#ifdef  DEBUGMSG
        printk(KERN_INFO "%s: variable dev =\n",dev->name);
        dumpit((char *) dev, sizeof(struct net_device));
        printk(KERN_INFO "%s: variable p_ctl",dev->name);
        dumpit((char *) p_ctl, sizeof(struct clawctl));
#endif
        p_connect=(struct conncmd *)&p_ctl->data;

        rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
		p_ctl->correlator, 0,
                p_connect->host_name, p_connect->WS_name);
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
		dev->name,__FUNCTION__, __LINE__, rc);
#endif
        return rc;
}     /*   end of claw_snd_disc    */


/*-------------------------------------------------------------------*
*               claw_snd_sys_validate_rsp                            *
*                                                                    *
*--------------------------------------------------------------------*/

static int
claw_snd_sys_validate_rsp(struct net_device *dev,
	struct clawctl *p_ctl, __u32 return_code)
{
        struct claw_env *  p_env;
        struct claw_privbk *privptr;
        int    rc;

#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter\n",
		dev->name,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(2,setup,"chkresp");
#ifdef DEBUGMSG
        printk(KERN_INFO "%s: variable return_code = %d, dev =\n",
		dev->name, return_code);
        dumpit((char *) dev, sizeof(struct net_device));
        printk(KERN_INFO "%s: variable p_ctl =\n",dev->name);
        dumpit((char *) p_ctl, sizeof(struct clawctl));
#endif
        privptr = dev->priv;
        p_env=privptr->p_env;
        rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
		p_ctl->linkid,
		p_ctl->correlator,
                return_code,
		p_env->host_name,
		p_env->adapter_name  );
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
		dev->name,__FUNCTION__,__LINE__, rc);
#endif
        return rc;
}     /*    end of claw_snd_sys_validate_rsp    */

/*-------------------------------------------------------------------*
*               claw_strt_conn_req                                   *
*                                                                    *
*--------------------------------------------------------------------*/

static int
claw_strt_conn_req(struct net_device *dev )
{
        int rc;

#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(2,setup,"conn_req");
#ifdef DEBUGMSG
        printk(KERN_INFO "%s: variable dev =\n",dev->name);
        dumpit((char *) dev, sizeof(struct net_device));
#endif
        rc=claw_snd_conn_req(dev, 1);
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
		dev->name,__FUNCTION__,__LINE__, rc);
#endif
        return rc;
}    /*   end of claw_strt_conn_req   */



/*-------------------------------------------------------------------*
 *   claw_stats                                                      *
 *-------------------------------------------------------------------*/

static struct
net_device_stats *claw_stats(struct net_device *dev)
{
        struct claw_privbk *privptr;
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(4,trace,"stats");
        privptr = dev->priv;
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Exit on line %d\n",
		dev->name,__FUNCTION__,__LINE__);
#endif
        return &privptr->stats;
}     /*   end of claw_stats   */


/*-------------------------------------------------------------------*
*       unpack_read                                                  *
*                                                                    *
*--------------------------------------------------------------------*/
static void
unpack_read(struct net_device *dev )
{
        struct sk_buff *skb;
        struct claw_privbk *privptr;
	struct claw_env    *p_env;
        struct ccwbk 	*p_this_ccw;
        struct ccwbk 	*p_first_ccw;
        struct ccwbk 	*p_last_ccw;
	struct clawph 	*p_packh;
	void		*p_packd;
	struct clawctl 	*p_ctlrec=NULL;

        __u32	len_of_data;
	__u32	pack_off;
        __u8	link_num;
        __u8 	mtc_this_frm=0;
        __u32	bytes_to_mov;
        struct chbk *p_ch = NULL;
        int	i=0;
	int     p=0;

#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s enter  \n",dev->name,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(4,trace,"unpkread");
        p_first_ccw=NULL;
        p_last_ccw=NULL;
	p_packh=NULL;
	p_packd=NULL;
        privptr=dev->priv;
	p_env = privptr->p_env;
        p_this_ccw=privptr->p_read_active_first;
        i=0;
	while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
#ifdef IOTRACE
		printk(KERN_INFO "%s p_this_ccw \n",dev->name);
                dumpit((char*)p_this_ccw, sizeof(struct ccwbk));
                printk(KERN_INFO "%s Inbound p_this_ccw->p_buffer(64)"
			" pk=%d \n",dev->name,p_env->packing);
                dumpit((char *)p_this_ccw->p_buffer, 64 );
#endif
		pack_off = 0;
		p = 0;
		p_this_ccw->header.flag=CLAW_PENDING;
		privptr->p_read_active_first=p_this_ccw->next;
                p_this_ccw->next=NULL;
		p_packh = (struct clawph *)p_this_ccw->p_buffer;
		if ((p_env->packing == PACK_SEND) &&
		    (p_packh->len == 32)           &&
		    (p_packh->link_num == 0)) {   /* is it a packed ctl rec? */
			p_packh++;  /* peek past pack header */
			p_ctlrec = (struct clawctl *)p_packh;
			p_packh--;  /* un peek */
			if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
		            (p_ctlrec->command == CONNECTION_CONFIRM))
				p_env->packing = DO_PACKED;
		}
		if (p_env->packing == DO_PACKED)
			link_num=p_packh->link_num;
		else
	                link_num=p_this_ccw->header.opcode / 8;
                if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
#ifdef DEBUGMSG
                        printk(KERN_INFO "%s: %s > More_to_come is ON\n",
			dev->name,__FUNCTION__);
#endif
                        mtc_this_frm=1;
                        if (p_this_ccw->header.length!=
				privptr->p_env->read_size ) {
                                printk(KERN_INFO " %s: Invalid frame detected "
					"length is %02x\n" ,
                                        dev->name, p_this_ccw->header.length);
                        }
                }

                if (privptr->mtc_skipping) {
                        /*
                        *   We're in the mode of skipping past a
			*   multi-frame message
                        *   that we can't process for some reason or other.
                        *   The first frame without the More-To-Come flag is
			*   the last frame of the skipped message.
                        */
                        /*  in case of More-To-Come not set in this frame */
                        if (mtc_this_frm==0) {
                                privptr->mtc_skipping=0; /* Ok, the end */
                                privptr->mtc_logical_link=-1;
                        }
#ifdef DEBUGMSG
                        printk(KERN_INFO "%s:%s goto next "
				"frame from MoretoComeSkip \n",
				dev->name,__FUNCTION__);
#endif
                        goto NextFrame;
                }

                if (link_num==0) {
                        claw_process_control(dev, p_this_ccw);
#ifdef DEBUGMSG
                        printk(KERN_INFO "%s:%s goto next "
				"frame from claw_process_control \n",
				dev->name,__FUNCTION__);
#endif
			CLAW_DBF_TEXT(4,trace,"UnpkCntl");
                        goto NextFrame;
                }
unpack_next:
		if (p_env->packing == DO_PACKED) {
			if (pack_off > p_env->read_size)
				goto NextFrame;
			p_packd = p_this_ccw->p_buffer+pack_off;
			p_packh = (struct clawph *) p_packd;
			if ((p_packh->len == 0) || /* all done with this frame? */
			    (p_packh->flag != 0))
				goto NextFrame;
			bytes_to_mov = p_packh->len;
			pack_off += bytes_to_mov+sizeof(struct clawph);
			p++;
		} else {
                	bytes_to_mov=p_this_ccw->header.length;
		}
                if (privptr->mtc_logical_link<0) {
#ifdef DEBUGMSG
                printk(KERN_INFO "%s: %s mtc_logical_link < 0  \n",
			dev->name,__FUNCTION__);
#endif

                /*
                *  if More-To-Come is set in this frame then we don't know
                *  length of entire message, and hence have to allocate
		*  large buffer   */

                /*      We are starting a new envelope  */
                privptr->mtc_offset=0;
                        privptr->mtc_logical_link=link_num;
                }

                if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
                        /*      error     */
#ifdef DEBUGMSG
                        printk(KERN_INFO "%s: %s > goto next "
				"frame from MoretoComeSkip \n",
				dev->name,
				__FUNCTION__);
                        printk(KERN_INFO "      bytes_to_mov %d > (MAX_ENVELOPE_"
				"SIZE-privptr->mtc_offset %d)\n",
				bytes_to_mov,(MAX_ENVELOPE_SIZE- privptr->mtc_offset));
#endif
                        privptr->stats.rx_frame_errors++;
                        goto NextFrame;
                }
		if (p_env->packing == DO_PACKED) {
			memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
				p_packd+sizeof(struct clawph), bytes_to_mov);

		} else	{
                	memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
                        	p_this_ccw->p_buffer, bytes_to_mov);
		}
#ifdef DEBUGMSG
                printk(KERN_INFO "%s: %s() received data \n",
			dev->name,__FUNCTION__);
		if (p_env->packing == DO_PACKED)
			dumpit((char *)p_packd+sizeof(struct clawph),32);
		else
	                dumpit((char *)p_this_ccw->p_buffer, 32);
		printk(KERN_INFO "%s: %s() bytelength %d \n",
			dev->name,__FUNCTION__,bytes_to_mov);
#endif
                if (mtc_this_frm==0) {
                        len_of_data=privptr->mtc_offset+bytes_to_mov;
                        skb=dev_alloc_skb(len_of_data);
                        if (skb) {
                                memcpy(skb_put(skb,len_of_data),
					privptr->p_mtc_envelope,
					len_of_data);
                                skb->mac.raw=skb->data;
                                skb->dev=dev;
                                skb->protocol=htons(ETH_P_IP);
                                skb->ip_summed=CHECKSUM_UNNECESSARY;
                                privptr->stats.rx_packets++;
				privptr->stats.rx_bytes+=len_of_data;
                                netif_rx(skb);
#ifdef DEBUGMSG
                                printk(KERN_INFO "%s: %s() netif_"
					"rx(skb) completed \n",
					dev->name,__FUNCTION__);
#endif
                        }
                        else {
                                privptr->stats.rx_dropped++;
                                printk(KERN_WARNING "%s: %s() low on memory\n",
				dev->name,__FUNCTION__);
                        }
                        privptr->mtc_offset=0;
                        privptr->mtc_logical_link=-1;
                }
                else {
                        privptr->mtc_offset+=bytes_to_mov;
                }
		if (p_env->packing == DO_PACKED)
			goto unpack_next;
NextFrame:
                /*
                *   Remove ThisCCWblock from active read queue, and add it
                *   to queue of free blocks to be reused.
                */
                i++;
                p_this_ccw->header.length=0xffff;
                p_this_ccw->header.opcode=0xff;
                /*
                *       add this one to the free queue for later reuse
                */
                if (p_first_ccw==NULL) {
                        p_first_ccw = p_this_ccw;
                }
                else {
                        p_last_ccw->next = p_this_ccw;
                }
                p_last_ccw = p_this_ccw;
                /*
                *       chain to next block on active read queue
                */
                p_this_ccw = privptr->p_read_active_first;
		CLAW_DBF_TEXT_(4,trace,"rxpkt %d",p);
        } /* end of while */

        /*      check validity                  */

#ifdef IOTRACE
        printk(KERN_INFO "%s:%s processed frame is %d \n",
		dev->name,__FUNCTION__,i);
        printk(KERN_INFO "%s:%s  F:%lx L:%lx\n",
		dev->name,
		__FUNCTION__,
		(unsigned long)p_first_ccw,
		(unsigned long)p_last_ccw);
#endif
	CLAW_DBF_TEXT_(4,trace,"rxfrm %d",i);
        add_claw_reads(dev, p_first_ccw, p_last_ccw);
        p_ch=&privptr->channel[READ];
        claw_strt_read(dev, LOCK_YES);
#ifdef FUNCTRACE
        printk(KERN_INFO "%s: %s exit on line %d\n",
		dev->name, __FUNCTION__, __LINE__);
#endif
        return;
}     /*  end of unpack_read   */

/*-------------------------------------------------------------------*
*       claw_strt_read                                               *
*                                                                    *
*--------------------------------------------------------------------*/
static void
claw_strt_read (struct net_device *dev, int lock )
{
        int        rc = 0;
        __u32      parm;
        unsigned long  saveflags = 0;
        struct claw_privbk *privptr=dev->priv;
        struct ccwbk*p_ccwbk;
        struct chbk *p_ch;
        struct clawh *p_clawh;
        p_ch=&privptr->channel[READ];

#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
        printk(KERN_INFO "%s: variable lock = %d, dev =\n",dev->name, lock);
        dumpit((char *) dev, sizeof(struct net_device));
#endif
	CLAW_DBF_TEXT(4,trace,"StRdNter");
        p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
        p_clawh->flag=CLAW_IDLE;    /* 0x00 */

        if ((privptr->p_write_active_first!=NULL &&
             privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
            (privptr->p_read_active_first!=NULL &&
             privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
                p_clawh->flag=CLAW_BUSY;    /* 0xff */
        }
#ifdef DEBUGMSG
        printk(KERN_INFO "%s:%s state-%02x\n" ,
		dev->name,__FUNCTION__, p_ch->claw_state);
#endif
        if (lock==LOCK_YES) {
                spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
        }
        if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
#ifdef DEBUGMSG
                printk(KERN_INFO "%s: HOT READ started in %s\n" ,
			dev->name,__FUNCTION__);
                p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
                dumpit((char *)&p_clawh->flag , 1);
#endif
		CLAW_DBF_TEXT(4,trace,"HotRead");
                p_ccwbk=privptr->p_read_active_first;
                parm = (unsigned long) p_ch;
                rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
				       0xff, 0);
                if (rc != 0) {
                        ccw_check_return_code(p_ch->cdev, rc);
                }
        }
	else {
#ifdef DEBUGMSG
		printk(KERN_INFO "%s: No READ started by %s() In progress\n" ,
			dev->name,__FUNCTION__);
#endif
		CLAW_DBF_TEXT(2,trace,"ReadAct");
	}

        if (lock==LOCK_YES) {
                spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
        }
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Exit on line %d\n",
		dev->name,__FUNCTION__,__LINE__);
#endif
	CLAW_DBF_TEXT(4,trace,"StRdExit");
        return;
}       /*    end of claw_strt_read    */

/*-------------------------------------------------------------------*
*       claw_strt_out_IO                                             *
*                                                                    *
*--------------------------------------------------------------------*/

static void
claw_strt_out_IO( struct net_device *dev )
{
        int             	rc = 0;
        unsigned long   	parm;
        struct claw_privbk 	*privptr;
        struct chbk     	*p_ch;
        struct ccwbk   	*p_first_ccw;

#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
#endif
	if (!dev) {
		return;
	}
        privptr=(struct claw_privbk *)dev->priv;
        p_ch=&privptr->channel[WRITE];

#ifdef DEBUGMSG
        printk(KERN_INFO "%s:%s state-%02x\n" ,
		dev->name,__FUNCTION__,p_ch->claw_state);
#endif
        CLAW_DBF_TEXT(4,trace,"strt_io");
        p_first_ccw=privptr->p_write_active_first;

        if (p_ch->claw_state == CLAW_STOP)
                return;
        if (p_first_ccw == NULL) {
#ifdef FUNCTRACE
                printk(KERN_INFO "%s:%s Exit on line %d\n",
			dev->name,__FUNCTION__,__LINE__);
#endif
                return;
        }
        if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
                parm = (unsigned long) p_ch;
#ifdef DEBUGMSG
                printk(KERN_INFO "%s:%s do_io \n" ,dev->name,__FUNCTION__);
                dumpit((char *)p_first_ccw, sizeof(struct ccwbk));
#endif
		CLAW_DBF_TEXT(2,trace,"StWrtIO");
                rc = ccw_device_start (p_ch->cdev,&p_first_ccw->write, parm,
				       0xff, 0);
                if (rc != 0) {
                        ccw_check_return_code(p_ch->cdev, rc);
                }
        }
        dev->trans_start = jiffies;
#ifdef FUNCTRACE
	printk(KERN_INFO "%s:%s Exit on line %d\n",
		dev->name,__FUNCTION__,__LINE__);
#endif

        return;
}       /*    end of claw_strt_out_IO    */

/*-------------------------------------------------------------------*
*       Free write buffers                                           *
*                                                                    *
*--------------------------------------------------------------------*/

static void
claw_free_wrt_buf( struct net_device *dev )
{

        struct claw_privbk *privptr=(struct claw_privbk *)dev->priv;
        struct ccwbk*p_first_ccw;
	struct ccwbk*p_last_ccw;
	struct ccwbk*p_this_ccw;
	struct ccwbk*p_next_ccw;
#ifdef IOTRACE
        struct ccwbk*p_buf;
#endif
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
        printk(KERN_INFO "%s: free count = %d  variable dev =\n",
		dev->name,privptr->write_free_count);
#endif
	CLAW_DBF_TEXT(4,trace,"freewrtb");
        /*  scan the write queue to free any completed write packets   */
        p_first_ccw=NULL;
        p_last_ccw=NULL;
#ifdef IOTRACE
        printk(KERN_INFO "%s:  Dump current CCW chain \n",dev->name  );
        p_buf=privptr->p_write_active_first;
        while (p_buf!=NULL) {
                dumpit((char *)p_buf, sizeof(struct ccwbk));
                p_buf=p_buf->next;
        }
        if (p_buf==NULL) {
                printk(KERN_INFO "%s: privptr->p_write_"
			"active_first==NULL\n",dev->name  );
        }
        p_buf=(struct ccwbk*)privptr->p_end_ccw;
        dumpit((char *)p_buf, sizeof(struct endccw));
#endif
        p_this_ccw=privptr->p_write_active_first;
        while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
        {
                p_next_ccw = p_this_ccw->next;
                if (((p_next_ccw!=NULL) &&
		     (p_next_ccw->header.flag!=CLAW_PENDING)) ||
                    ((p_this_ccw == privptr->p_write_active_last) &&
                     (p_this_ccw->header.flag!=CLAW_PENDING))) {
                        /* The next CCW is OK or this is  */
			/* the last CCW...free it   @A1A  */
                        privptr->p_write_active_first=p_this_ccw->next;
			p_this_ccw->header.flag=CLAW_PENDING;
                        p_this_ccw->next=privptr->p_write_free_chain;
			privptr->p_write_free_chain=p_this_ccw;
                        ++privptr->write_free_count;
			privptr->stats.tx_bytes+= p_this_ccw->write.count;
			p_this_ccw=privptr->p_write_active_first;
                        privptr->stats.tx_packets++;
                }
                else {
			break;
                }
        }
        if (privptr->write_free_count!=0) {
                claw_clearbit_busy(TB_NOBUFFER,dev);
        }
        /*   whole chain removed?   */
        if (privptr->p_write_active_first==NULL) {
                privptr->p_write_active_last=NULL;
#ifdef DEBUGMSG
                printk(KERN_INFO "%s:%s p_write_"
			"active_first==NULL\n",dev->name,__FUNCTION__);
#endif
        }
#ifdef IOTRACE
        printk(KERN_INFO "%s: Dump arranged CCW chain \n",dev->name  );
        p_buf=privptr->p_write_active_first;
        while (p_buf!=NULL) {
                dumpit((char *)p_buf, sizeof(struct ccwbk));
                p_buf=p_buf->next;
        }
        if (p_buf==NULL) {
                printk(KERN_INFO "%s: privptr->p_write_active_"
			"first==NULL\n",dev->name  );
        }
        p_buf=(struct ccwbk*)privptr->p_end_ccw;
        dumpit((char *)p_buf, sizeof(struct endccw));
#endif

	CLAW_DBF_TEXT_(4,trace,"FWC=%d",privptr->write_free_count);
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Exit on line %d free_count =%d\n",
		dev->name,__FUNCTION__, __LINE__,privptr->write_free_count);
#endif
        return;
}

/*-------------------------------------------------------------------*
*       claw free netdevice                                          *
*                                                                    *
*--------------------------------------------------------------------*/
static void
claw_free_netdevice(struct net_device * dev, int free_dev)
{
	struct claw_privbk *privptr;
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(2,setup,"free_dev");

	if (!dev)
		return;
	CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
	privptr = dev->priv;
	if (dev->flags & IFF_RUNNING)
		claw_release(dev);
	if (privptr) {
		privptr->channel[READ].ndev = NULL;  /* say it's free */
	}
	dev->priv=NULL;
#ifdef MODULE
	if (free_dev) {
		free_netdev(dev);
	}
#endif
	CLAW_DBF_TEXT(2,setup,"feee_ok");
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
#endif
}

/**
 * Claw init netdevice
 * Initialize everything of the net device except the name and the
 * channel structs.
 */
static void
claw_init_netdevice(struct net_device * dev)
{
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(2,setup,"init_dev");
	CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
	if (!dev) {
        printk(KERN_WARNING "claw:%s BAD Device exit line %d\n",
		__FUNCTION__,__LINE__);
		CLAW_DBF_TEXT(2,setup,"baddev");
		return;
	}
	dev->mtu = CLAW_DEFAULT_MTU_SIZE;
	dev->hard_start_xmit = claw_tx;
	dev->open = claw_open;
	dev->stop = claw_release;
	dev->get_stats = claw_stats;
	dev->change_mtu = claw_change_mtu;
	dev->hard_header_len = 0;
	dev->addr_len = 0;
	dev->type = ARPHRD_SLIP;
	dev->tx_queue_len = 1300;
	dev->flags = IFF_POINTOPOINT | IFF_NOARP;
	SET_MODULE_OWNER(dev);
#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
#endif
	CLAW_DBF_TEXT(2,setup,"initok");
	return;
}

/**
 * Init a new channel in the privptr->channel[i].
 *
 * @param cdev  The ccw_device to be added.
 *
 * @return 0 on success, !0 on error.
 */
static int
add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
{
	struct chbk *p_ch;

#ifdef FUNCTRACE
        printk(KERN_INFO "%s:%s Enter\n",cdev->dev.bus_id,__FUNCTION__);
#endif
	CLAW_DBF_TEXT_(2,setup,"%s",cdev->dev.bus_id);
	privptr->channel[i].flag  = i+1;   /* Read is 1 Write is 2 */
	p_ch = &privptr->channel[i];
	p_ch->cdev = cdev;
	snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", cdev->dev.bus_id);
	sscanf(cdev->dev.bus_id+4,"%x",&p_ch->devno);
	if ((p_ch->irb = kmalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
		printk(KERN_WARNING "%s Out of memory in %s for irb\n",
			p_ch->id,__FUNCTION__);
#ifdef FUNCTRACE
        	printk(KERN_INFO "%s:%s Exit on line %d\n",
			p_ch->id,__FUNCTION__,__LINE__);
#endif
		return -ENOMEM;
	}
	memset(p_ch->irb, 0, sizeof (struct irb));
#ifdef FUNCTRACE
        	printk(KERN_INFO "%s:%s Exit on line %d\n",
			cdev->dev.bus_id,__FUNCTION__,__LINE__);
#endif
	return 0;
}


/**
 *
 * Setup an interface.
 *
 * @param cgdev  Device to be setup.
 *
 * @returns 0 on success, !0 on failure.
 */
static int
claw_new_device(struct ccwgroup_device *cgdev)
{
	struct claw_privbk *privptr;
	struct claw_env *p_env;
	struct net_device *dev;
	int ret;

	pr_debug("%s() called\n", __FUNCTION__);
	printk(KERN_INFO "claw: add for %s\n",cgdev->cdev[READ]->dev.bus_id);
	CLAW_DBF_TEXT(2,setup,"new_dev");
	privptr = cgdev->dev.driver_data;
	cgdev->cdev[READ]->dev.driver_data = privptr;
	cgdev->cdev[WRITE]->dev.driver_data = privptr;
	if (!privptr)
		return -ENODEV;
	p_env = privptr->p_env;
	sscanf(cgdev->cdev[READ]->dev.bus_id+4,"%x",
		&p_env->devno[READ]);
        sscanf(cgdev->cdev[WRITE]->dev.bus_id+4,"%x",
		&p_env->devno[WRITE]);
	ret = add_channel(cgdev->cdev[0],0,privptr);
	if (ret == 0)
		ret = add_channel(cgdev->cdev[1],1,privptr);
	if (ret != 0) {
			printk(KERN_WARNING
		 	"add channel failed "
				"with ret = %d\n", ret);
			goto out;
	}
	ret = ccw_device_set_online(cgdev->cdev[READ]);
	if (ret != 0) {
		printk(KERN_WARNING
		 "claw: ccw_device_set_online %s READ failed "
			"with ret = %d\n",cgdev->cdev[READ]->dev.bus_id,ret);
		goto out;
	}
	ret = ccw_device_set_online(cgdev->cdev[WRITE]);
	if (ret != 0) {
		printk(KERN_WARNING
		 "claw: ccw_device_set_online %s WRITE failed "
			"with ret = %d\n",cgdev->cdev[WRITE]->dev.bus_id, ret);
		goto out;
	}
	dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
	if (!dev) {
		printk(KERN_WARNING "%s:alloc_netdev failed\n",__FUNCTION__);
		goto out;
	}
	dev->priv = privptr;
	cgdev->dev.driver_data = privptr;
        cgdev->cdev[READ]->dev.driver_data = privptr;
        cgdev->cdev[WRITE]->dev.driver_data = privptr;
	/* sysfs magic */
        SET_NETDEV_DEV(dev, &cgdev->dev);
	if (register_netdev(dev) != 0) {
		claw_free_netdevice(dev, 1);
		CLAW_DBF_TEXT(2,trace,"regfail");
		goto out;
	}
	dev->flags &=~IFF_RUNNING;
	if (privptr->buffs_alloc == 0) {
	        ret=init_ccw_bk(dev);
		if (ret !=0) {
			printk(KERN_WARNING
			 "claw: init_ccw_bk failed with ret=%d\n", ret);
			unregister_netdev(dev);
			claw_free_netdevice(dev,1);
			CLAW_DBF_TEXT(2,trace,"ccwmem");
			goto out;
		}
	}
	privptr->channel[READ].ndev = dev;
	privptr->channel[WRITE].ndev = dev;
	privptr->p_env->ndev = dev;

	printk(KERN_INFO "%s:readsize=%d  writesize=%d "
		"readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
                dev->name, p_env->read_size,
		p_env->write_size, p_env->read_buffers,
                p_env->write_buffers, p_env->devno[READ],
		p_env->devno[WRITE]);
        printk(KERN_INFO "%s:host_name:%.8s, adapter_name "
		":%.8s api_type: %.8s\n",
                dev->name, p_env->host_name,
		p_env->adapter_name , p_env->api_type);
	return 0;
out:
	ccw_device_set_offline(cgdev->cdev[1]);
	ccw_device_set_offline(cgdev->cdev[0]);

	return -ENODEV;
}

static void
claw_purge_skb_queue(struct sk_buff_head *q)
{
        struct sk_buff *skb;

        CLAW_DBF_TEXT(4,trace,"purgque");

        while ((skb = skb_dequeue(q))) {
                atomic_dec(&skb->users);
                dev_kfree_skb_any(skb);
        }
}

/**
 * Shutdown an interface.
 *
 * @param cgdev  Device to be shut down.
 *
 * @returns 0 on success, !0 on failure.
 */
static int
claw_shutdown_device(struct ccwgroup_device *cgdev)
{
	struct claw_privbk *priv;
	struct net_device *ndev;
	int	ret;

	pr_debug("%s() called\n", __FUNCTION__);
	CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
	priv = cgdev->dev.driver_data;
	if (!priv)
		return -ENODEV;
	ndev = priv->channel[READ].ndev;
	if (ndev) {
		/* Close the device */
		printk(KERN_INFO
			"%s: shuting down \n",ndev->name);
		if (ndev->flags & IFF_RUNNING)
			ret = claw_release(ndev);
		ndev->flags &=~IFF_RUNNING;
		unregister_netdev(ndev);
		ndev->priv = NULL;  /* cgdev data, not ndev's to free */
		claw_free_netdevice(ndev, 1);
		priv->channel[READ].ndev = NULL;
		priv->channel[WRITE].ndev = NULL;
		priv->p_env->ndev = NULL;
	}
	ccw_device_set_offline(cgdev->cdev[1]);
	ccw_device_set_offline(cgdev->cdev[0]);
	return 0;
}

static void
claw_remove_device(struct ccwgroup_device *cgdev)
{
	struct claw_privbk *priv;

	pr_debug("%s() called\n", __FUNCTION__);
	CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
	priv = cgdev->dev.driver_data;
	if (!priv) {
		printk(KERN_WARNING "claw: %s() no Priv exiting\n",__FUNCTION__);
		return;
	}
	printk(KERN_INFO "claw: %s() called %s will be removed.\n",
			__FUNCTION__,cgdev->cdev[0]->dev.bus_id);
	if (cgdev->state == CCWGROUP_ONLINE)
		claw_shutdown_device(cgdev);
	claw_remove_files(&cgdev->dev);
	kfree(priv->p_mtc_envelope);
	priv->p_mtc_envelope=NULL;
	kfree(priv->p_env);
	priv->p_env=NULL;
	kfree(priv->channel[0].irb);
	priv->channel[0].irb=NULL;
	kfree(priv->channel[1].irb);
	priv->channel[1].irb=NULL;
	kfree(priv);
	cgdev->dev.driver_data=NULL;
	cgdev->cdev[READ]->dev.driver_data = NULL;
	cgdev->cdev[WRITE]->dev.driver_data = NULL;
	put_device(&cgdev->dev);
}


/*
 * sysfs attributes
 */
static ssize_t
claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct claw_privbk *priv;
	struct claw_env *  p_env;

	priv = dev->driver_data;
	if (!priv)
		return -ENODEV;
	p_env = priv->p_env;
	return sprintf(buf, "%s\n",p_env->host_name);
}

static ssize_t
claw_hname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	struct claw_privbk *priv;
	struct claw_env *  p_env;

	priv = dev->driver_data;
	if (!priv)
		return -ENODEV;
	p_env = priv->p_env;
	if (count > MAX_NAME_LEN+1)
		return -EINVAL;
	memset(p_env->host_name, 0x20, MAX_NAME_LEN);
	strncpy(p_env->host_name,buf, count);
	p_env->host_name[count-1] = 0x20;  /* clear extra 0x0a */
	p_env->host_name[MAX_NAME_LEN] = 0x00;
	CLAW_DBF_TEXT(2,setup,"HstnSet");
        CLAW_DBF_TEXT_(2,setup,"%s",p_env->host_name);

	return count;
}

static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);

static ssize_t
claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct claw_privbk *priv;
	struct claw_env *  p_env;

	priv = dev->driver_data;
	if (!priv)
		return -ENODEV;
	p_env = priv->p_env;
	return sprintf(buf, "%s\n",p_env->adapter_name);
}

static ssize_t
claw_adname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	struct claw_privbk *priv;
	struct claw_env *  p_env;

	priv = dev->driver_data;
	if (!priv)
		return -ENODEV;
	p_env = priv->p_env;
	if (count > MAX_NAME_LEN+1)
		return -EINVAL;
	memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
	strncpy(p_env->adapter_name,buf, count);
	p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
	p_env->adapter_name[MAX_NAME_LEN] = 0x00;
	CLAW_DBF_TEXT(2,setup,"AdnSet");
	CLAW_DBF_TEXT_(2,setup,"%s",p_env->adapter_name);

	return count;
}

static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);

static ssize_t
claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct claw_privbk *priv;
	struct claw_env *  p_env;

	priv = dev->driver_data;
	if (!priv)
		return -ENODEV;
	p_env = priv->p_env;
	return sprintf(buf, "%s\n",
		       p_env->api_type);
}

static ssize_t
claw_apname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	struct claw_privbk *priv;
	struct claw_env *  p_env;

	priv = dev->driver_data;
	if (!priv)
		return -ENODEV;
	p_env = priv->p_env;
	if (count > MAX_NAME_LEN+1)
		return -EINVAL;
	memset(p_env->api_type, 0x20, MAX_NAME_LEN);
	strncpy(p_env->api_type,buf, count);
	p_env->api_type[count-1] = 0x20;  /* we get a loose 0x0a */
	p_env->api_type[MAX_NAME_LEN] = 0x00;
	if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
		p_env->read_size=DEF_PACK_BUFSIZE;
		p_env->write_size=DEF_PACK_BUFSIZE;
		p_env->packing=PACKING_ASK;
		CLAW_DBF_TEXT(2,setup,"PACKING");
	}
	else {
		p_env->packing=0;
		p_env->read_size=CLAW_FRAME_SIZE;
		p_env->write_size=CLAW_FRAME_SIZE;
		CLAW_DBF_TEXT(2,setup,"ApiSet");
	}
	CLAW_DBF_TEXT_(2,setup,"%s",p_env->api_type);
	return count;
}

static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);

static ssize_t
claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct claw_privbk *priv;
	struct claw_env * p_env;

	priv = dev->driver_data;
	if (!priv)
		return -ENODEV;
	p_env = priv->p_env;
	return sprintf(buf, "%d\n", p_env->write_buffers);
}

static ssize_t
claw_wbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	struct claw_privbk *priv;
	struct claw_env *  p_env;
	int nnn,max;

	priv = dev->driver_data;
	if (!priv)
		return -ENODEV;
	p_env = priv->p_env;
	sscanf(buf, "%i", &nnn);
	if (p_env->packing) {
		max = 64;
	}
	else {
		max = 512;
	}
	if ((nnn > max ) || (nnn < 2))
		return -EINVAL;
	p_env->write_buffers = nnn;
	CLAW_DBF_TEXT(2,setup,"Wbufset");
        CLAW_DBF_TEXT_(2,setup,"WB=%d",p_env->write_buffers);
	return count;
}

static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);

static ssize_t
claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct claw_privbk *priv;
	struct claw_env *  p_env;

	priv = dev->driver_data;
	if (!priv)
		return -ENODEV;
	p_env = priv->p_env;
	return sprintf(buf, "%d\n", p_env->read_buffers);
}

static ssize_t
claw_rbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	struct claw_privbk *priv;
	struct claw_env *p_env;
	int nnn,max;

	priv = dev->driver_data;
	if (!priv)
		return -ENODEV;
	p_env = priv->p_env;
	sscanf(buf, "%i", &nnn);
	if (p_env->packing) {
		max = 64;
	}
	else {
		max = 512;
	}
	if ((nnn > max ) || (nnn < 2))
		return -EINVAL;
	p_env->read_buffers = nnn;
	CLAW_DBF_TEXT(2,setup,"Rbufset");
	CLAW_DBF_TEXT_(2,setup,"RB=%d",p_env->read_buffers);
	return count;
}

static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);

static struct attribute *claw_attr[] = {
	&dev_attr_read_buffer.attr,
	&dev_attr_write_buffer.attr,
	&dev_attr_adapter_name.attr,
	&dev_attr_api_type.attr,
	&dev_attr_host_name.attr,
	NULL,
};

static struct attribute_group claw_attr_group = {
	.attrs = claw_attr,
};

static int
claw_add_files(struct device *dev)
{
	pr_debug("%s() called\n", __FUNCTION__);
	CLAW_DBF_TEXT(2,setup,"add_file");
	return sysfs_create_group(&dev->kobj, &claw_attr_group);
}

static void
claw_remove_files(struct device *dev)
{
	pr_debug("%s() called\n", __FUNCTION__);
	CLAW_DBF_TEXT(2,setup,"rem_file");
	sysfs_remove_group(&dev->kobj, &claw_attr_group);
}

/*--------------------------------------------------------------------*
*    claw_init  and cleanup                                           *
*---------------------------------------------------------------------*/

static void __exit
claw_cleanup(void)
{
	unregister_cu3088_discipline(&claw_group_driver);
	claw_unregister_debug_facility();
	printk(KERN_INFO "claw: Driver unloaded\n");

}

/**
 * Initialize module.
 * This is called just after the module is loaded.
 *
 * @return 0 on success, !0 on error.
 */
static int __init
claw_init(void)
{
	int ret = 0;
       printk(KERN_INFO "claw: starting driver "
#ifdef MODULE
                "module "
#else
                "compiled into kernel "
#endif
                " $Revision: 1.38 $ $Date: 2005/08/29 09:47:04 $ \n");


#ifdef FUNCTRACE
        printk(KERN_INFO "claw: %s() enter \n",__FUNCTION__);
#endif
	ret = claw_register_debug_facility();
	if (ret) {
		printk(KERN_WARNING "claw: %s() debug_register failed %d\n",
			__FUNCTION__,ret);
		return ret;
	}
	CLAW_DBF_TEXT(2,setup,"init_mod");
	ret = register_cu3088_discipline(&claw_group_driver);
	if (ret) {
		claw_unregister_debug_facility();
		printk(KERN_WARNING "claw; %s() cu3088 register failed %d\n",
			__FUNCTION__,ret);
	}
#ifdef FUNCTRACE
        printk(KERN_INFO "claw: %s() exit \n",__FUNCTION__);
#endif
	return ret;
}

module_init(claw_init);
module_exit(claw_cleanup);



/*--------------------------------------------------------------------*
*    End of File                                                      *
*---------------------------------------------------------------------*/