summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/bnx2i/bnx2i_hwi.c
blob: f9d6f4129093d0c8f83e1a50510ebb440994c3c5 (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
/* bnx2i_hwi.c: Broadcom NetXtreme II iSCSI driver.
 *
 * Copyright (c) 2006 - 2011 Broadcom Corporation
 * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
 * Copyright (c) 2007, 2008 Mike Christie
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation.
 *
 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
 * Maintained by: Eddie Wai (eddie.wai@broadcom.com)
 */

#include <linux/gfp.h>
#include <scsi/scsi_tcq.h>
#include <scsi/libiscsi.h>
#include "bnx2i.h"

DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);

/**
 * bnx2i_get_cid_num - get cid from ep
 * @ep: 	endpoint pointer
 *
 * Only applicable to 57710 family of devices
 */
static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep)
{
	u32 cid;

	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
		cid = ep->ep_cid;
	else
		cid = GET_CID_NUM(ep->ep_cid);
	return cid;
}


/**
 * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type
 * @hba: 		Adapter for which adjustments is to be made
 *
 * Only applicable to 57710 family of devices
 */
static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba)
{
	u32 num_elements_per_pg;

	if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) ||
	    test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) ||
	    test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
		if (!is_power_of_2(hba->max_sqes))
			hba->max_sqes = rounddown_pow_of_two(hba->max_sqes);

		if (!is_power_of_2(hba->max_rqes))
			hba->max_rqes = rounddown_pow_of_two(hba->max_rqes);
	}

	/* Adjust each queue size if the user selection does not
	 * yield integral num of page buffers
	 */
	/* adjust SQ */
	num_elements_per_pg = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
	if (hba->max_sqes < num_elements_per_pg)
		hba->max_sqes = num_elements_per_pg;
	else if (hba->max_sqes % num_elements_per_pg)
		hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) &
				 ~(num_elements_per_pg - 1);

	/* adjust CQ */
	num_elements_per_pg = PAGE_SIZE / BNX2I_CQE_SIZE;
	if (hba->max_cqes < num_elements_per_pg)
		hba->max_cqes = num_elements_per_pg;
	else if (hba->max_cqes % num_elements_per_pg)
		hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) &
				 ~(num_elements_per_pg - 1);

	/* adjust RQ */
	num_elements_per_pg = PAGE_SIZE / BNX2I_RQ_WQE_SIZE;
	if (hba->max_rqes < num_elements_per_pg)
		hba->max_rqes = num_elements_per_pg;
	else if (hba->max_rqes % num_elements_per_pg)
		hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) &
				 ~(num_elements_per_pg - 1);
}


/**
 * bnx2i_get_link_state - get network interface link state
 * @hba:	adapter instance pointer
 *
 * updates adapter structure flag based on netdev state
 */
static void bnx2i_get_link_state(struct bnx2i_hba *hba)
{
	if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))
		set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
	else
		clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
}


/**
 * bnx2i_iscsi_license_error - displays iscsi license related error message
 * @hba:		adapter instance pointer
 * @error_code:		error classification
 *
 * Puts out an error log when driver is unable to offload iscsi connection
 *	due to license restrictions
 */
static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code)
{
	if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED)
		/* iSCSI offload not supported on this device */
		printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n",
				hba->netdev->name);
	if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED)
		/* iSCSI offload not supported on this LOM device */
		printk(KERN_ERR "bnx2i: LOM is not enable to "
				"offload iSCSI connections, dev=%s\n",
				hba->netdev->name);
	set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state);
}


/**
 * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification
 * @ep:		endpoint (transport indentifier) structure
 * @action:	action, ARM or DISARM. For now only ARM_CQE is used
 *
 * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt
 *	the driver. EQ event is generated CQ index is hit or at least 1 CQ is
 *	outstanding and on chip timer expires
 */
int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
{
	struct bnx2i_5771x_cq_db *cq_db;
	u16 cq_index;
	u16 next_index = 0;
	u32 num_active_cmds;

	/* Coalesce CQ entries only on 10G devices */
	if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
		return 0;

	/* Do not update CQ DB multiple times before firmware writes
	 * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious
	 * interrupts and other unwanted results
	 */
	cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;

	if (action != CNIC_ARM_CQE_FP)
		if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF)
			return 0;

	if (action == CNIC_ARM_CQE || action == CNIC_ARM_CQE_FP) {
		num_active_cmds = atomic_read(&ep->num_active_cmds);
		if (num_active_cmds <= event_coal_min)
			next_index = 1;
		else {
			next_index = num_active_cmds >> ep->ec_shift;
			if (next_index > num_active_cmds - event_coal_min)
				next_index = num_active_cmds - event_coal_min;
		}
		if (!next_index)
			next_index = 1;
		cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1;
		if (cq_index > ep->qp.cqe_size * 2)
			cq_index -= ep->qp.cqe_size * 2;
		if (!cq_index)
			cq_index = 1;

		cq_db->sqn[0] = cq_index;
	}
	return next_index;
}


/**
 * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
 * @conn:		iscsi connection on which RQ event occurred
 * @ptr:		driver buffer to which RQ buffer contents is to
 *			be copied
 * @len:		length of valid data inside RQ buf
 *
 * Copies RQ buffer contents from shared (DMA'able) memory region to
 *	driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
 *	scsi sense info
 */
void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)
{
	if (!bnx2i_conn->ep->qp.rqe_left)
		return;

	bnx2i_conn->ep->qp.rqe_left--;
	memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);
	if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {
		bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;
		bnx2i_conn->ep->qp.rq_cons_idx = 0;
	} else {
		bnx2i_conn->ep->qp.rq_cons_qe++;
		bnx2i_conn->ep->qp.rq_cons_idx++;
	}
}


static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)
{
	struct bnx2i_5771x_dbell dbell;
	u32 msg;

	memset(&dbell, 0, sizeof(dbell));
	dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<
			      B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);
	msg = *((u32 *)&dbell);
	/* TODO : get doorbell register mapping */
	writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);
}


/**
 * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell
 * @conn:	iscsi connection on which event to post
 * @count:	number of RQ buffer being posted to chip
 *
 * No need to ring hardware doorbell for 57710 family of devices
 */
void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)
{
	struct bnx2i_5771x_sq_rq_db *rq_db;
	u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);
	struct bnx2i_endpoint *ep = bnx2i_conn->ep;

	ep->qp.rqe_left += count;
	ep->qp.rq_prod_idx &= 0x7FFF;
	ep->qp.rq_prod_idx += count;

	if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {
		ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;
		if (!hi_bit)
			ep->qp.rq_prod_idx |= 0x8000;
	} else
		ep->qp.rq_prod_idx |= hi_bit;

	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
		rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;
		rq_db->prod_idx = ep->qp.rq_prod_idx;
		/* no need to ring hardware doorbell for 57710 */
	} else {
		writew(ep->qp.rq_prod_idx,
		       ep->qp.ctx_base + CNIC_RECV_DOORBELL);
	}
	mmiowb();
}


/**
 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
 * @conn: 		iscsi connection to which new SQ entries belong
 * @count: 		number of SQ WQEs to post
 *
 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
 *	of devices. For 5706/5708/5709 new SQ WQE count is written into the
 *	doorbell register
 */
static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
{
	struct bnx2i_5771x_sq_rq_db *sq_db;
	struct bnx2i_endpoint *ep = bnx2i_conn->ep;

	atomic_inc(&ep->num_active_cmds);
	wmb();	/* flush SQ WQE memory before the doorbell is rung */
	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
		sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
		sq_db->prod_idx = ep->qp.sq_prod_idx;
		bnx2i_ring_577xx_doorbell(bnx2i_conn);
	} else
		writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);

	mmiowb(); /* flush posted PCI writes */
}


/**
 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
 * @conn:	iscsi connection to which new SQ entries belong
 * @count:	number of SQ WQEs to post
 *
 * this routine will update SQ driver parameters and ring the doorbell
 */
static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
					      int count)
{
	int tmp_cnt;

	if (count == 1) {
		if (bnx2i_conn->ep->qp.sq_prod_qe ==
		    bnx2i_conn->ep->qp.sq_last_qe)
			bnx2i_conn->ep->qp.sq_prod_qe =
						bnx2i_conn->ep->qp.sq_first_qe;
		else
			bnx2i_conn->ep->qp.sq_prod_qe++;
	} else {
		if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
		    bnx2i_conn->ep->qp.sq_last_qe)
			bnx2i_conn->ep->qp.sq_prod_qe += count;
		else {
			tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
				bnx2i_conn->ep->qp.sq_prod_qe;
			bnx2i_conn->ep->qp.sq_prod_qe =
				&bnx2i_conn->ep->qp.sq_first_qe[count -
								(tmp_cnt + 1)];
		}
	}
	bnx2i_conn->ep->qp.sq_prod_idx += count;
	/* Ring the doorbell */
	bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
}


/**
 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
 * @conn:	iscsi connection
 * @cmd:	driver command structure which is requesting
 *		a WQE to sent to chip for further processing
 *
 * prepare and post an iSCSI Login request WQE to CNIC firmware
 */
int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
			   struct iscsi_task *task)
{
	struct bnx2i_cmd *bnx2i_cmd;
	struct bnx2i_login_request *login_wqe;
	struct iscsi_login_req *login_hdr;
	u32 dword;

	bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
	login_hdr = (struct iscsi_login_req *)task->hdr;
	login_wqe = (struct bnx2i_login_request *)
						bnx2i_conn->ep->qp.sq_prod_qe;

	login_wqe->op_code = login_hdr->opcode;
	login_wqe->op_attr = login_hdr->flags;
	login_wqe->version_max = login_hdr->max_version;
	login_wqe->version_min = login_hdr->min_version;
	login_wqe->data_length = ntoh24(login_hdr->dlength);
	login_wqe->isid_lo = *((u32 *) login_hdr->isid);
	login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
	login_wqe->tsih = login_hdr->tsih;
	login_wqe->itt = task->itt |
		(ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
	login_wqe->cid = login_hdr->cid;

	login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
	login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
	login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN;

	login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
	login_wqe->resp_bd_list_addr_hi =
		(u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);

	dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
		 (bnx2i_conn->gen_pdu.resp_buf_size <<
		  ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
	login_wqe->resp_buffer = dword;
	login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
	login_wqe->bd_list_addr_hi =
		(u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
	login_wqe->num_bds = 1;
	login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */

	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
	return 0;
}

/**
 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
 * @conn:	iscsi connection
 * @mtask:	driver command structure which is requesting
 *		a WQE to sent to chip for further processing
 *
 * prepare and post an iSCSI Login request WQE to CNIC firmware
 */
int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
			 struct iscsi_task *mtask)
{
	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
	struct iscsi_tm *tmfabort_hdr;
	struct scsi_cmnd *ref_sc;
	struct iscsi_task *ctask;
	struct bnx2i_cmd *bnx2i_cmd;
	struct bnx2i_tmf_request *tmfabort_wqe;
	u32 dword;
	u32 scsi_lun[2];

	bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
	tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
	tmfabort_wqe = (struct bnx2i_tmf_request *)
						bnx2i_conn->ep->qp.sq_prod_qe;

	tmfabort_wqe->op_code = tmfabort_hdr->opcode;
	tmfabort_wqe->op_attr = tmfabort_hdr->flags;

	tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
	tmfabort_wqe->reserved2 = 0;
	tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);

	switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
	case ISCSI_TM_FUNC_ABORT_TASK:
	case ISCSI_TM_FUNC_TASK_REASSIGN:
		ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
		if (!ctask || !ctask->sc)
			/*
			 * the iscsi layer must have completed the cmd while
			 * was starting up.
			 *
			 * Note: In the case of a SCSI cmd timeout, the task's
			 *       sc is still active; hence ctask->sc != 0
			 *       In this case, the task must be aborted
			 */
			return 0;

		ref_sc = ctask->sc;
		if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
			dword = (ISCSI_TASK_TYPE_WRITE <<
				 ISCSI_CMD_REQUEST_TYPE_SHIFT);
		else
			dword = (ISCSI_TASK_TYPE_READ <<
				 ISCSI_CMD_REQUEST_TYPE_SHIFT);
		tmfabort_wqe->ref_itt = (dword |
					(tmfabort_hdr->rtt & ISCSI_ITT_MASK));
		break;
	default:
		tmfabort_wqe->ref_itt = RESERVED_ITT;
	}
	memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun));
	tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
	tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);

	tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);

	tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
	tmfabort_wqe->bd_list_addr_hi = (u32)
				((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
	tmfabort_wqe->num_bds = 1;
	tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */

	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
	return 0;
}

/**
 * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware
 * @conn:	iscsi connection
 * @mtask:	driver command structure which is requesting
 *		a WQE to sent to chip for further processing
 *
 * prepare and post an iSCSI Text request WQE to CNIC firmware
 */
int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn,
			  struct iscsi_task *mtask)
{
	struct bnx2i_cmd *bnx2i_cmd;
	struct bnx2i_text_request *text_wqe;
	struct iscsi_text *text_hdr;
	u32 dword;

	bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
	text_hdr = (struct iscsi_text *)mtask->hdr;
	text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe;

	memset(text_wqe, 0, sizeof(struct bnx2i_text_request));

	text_wqe->op_code = text_hdr->opcode;
	text_wqe->op_attr = text_hdr->flags;
	text_wqe->data_length = ntoh24(text_hdr->dlength);
	text_wqe->itt = mtask->itt |
		(ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT);
	text_wqe->ttt = be32_to_cpu(text_hdr->ttt);

	text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn);

	text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
	text_wqe->resp_bd_list_addr_hi =
			(u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);

	dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) |
		 (bnx2i_conn->gen_pdu.resp_buf_size <<
		  ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
	text_wqe->resp_buffer = dword;
	text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
	text_wqe->bd_list_addr_hi =
			(u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
	text_wqe->num_bds = 1;
	text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */

	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
	return 0;
}


/**
 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
 * @conn:	iscsi connection
 * @cmd:	driver command structure which is requesting
 *		a WQE to sent to chip for further processing
 *
 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
 */
int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
			     struct bnx2i_cmd *cmd)
{
	struct bnx2i_cmd_request *scsi_cmd_wqe;

	scsi_cmd_wqe = (struct bnx2i_cmd_request *)
						bnx2i_conn->ep->qp.sq_prod_qe;
	memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
	scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */

	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
	return 0;
}

/**
 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
 * @conn:		iscsi connection
 * @cmd:		driver command structure which is requesting
 *			a WQE to sent to chip for further processing
 * @datap:		payload buffer pointer
 * @data_len:		payload data length
 * @unsol:		indicated whether nopout pdu is unsolicited pdu or
 *			in response to target's NOPIN w/ TTT != FFFFFFFF
 *
 * prepare and post a nopout request WQE to CNIC firmware
 */
int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
			    struct iscsi_task *task,
			    char *datap, int data_len, int unsol)
{
	struct bnx2i_endpoint *ep = bnx2i_conn->ep;
	struct bnx2i_cmd *bnx2i_cmd;
	struct bnx2i_nop_out_request *nopout_wqe;
	struct iscsi_nopout *nopout_hdr;

	bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
	nopout_hdr = (struct iscsi_nopout *)task->hdr;
	nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;

	memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request));

	nopout_wqe->op_code = nopout_hdr->opcode;
	nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
	memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8);

	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
		u32 tmp = nopout_wqe->lun[0];
		/* 57710 requires LUN field to be swapped */
		nopout_wqe->lun[0] = nopout_wqe->lun[1];
		nopout_wqe->lun[1] = tmp;
	}

	nopout_wqe->itt = ((u16)task->itt |
			   (ISCSI_TASK_TYPE_MPATH <<
			    ISCSI_TMF_REQUEST_TYPE_SHIFT));
	nopout_wqe->ttt = be32_to_cpu(nopout_hdr->ttt);
	nopout_wqe->flags = 0;
	if (!unsol)
		nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
	else if (nopout_hdr->itt == RESERVED_ITT)
		nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;

	nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
	nopout_wqe->data_length = data_len;
	if (data_len) {
		/* handle payload data, not required in first release */
		printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
	} else {
		nopout_wqe->bd_list_addr_lo = (u32)
					bnx2i_conn->hba->mp_bd_dma;
		nopout_wqe->bd_list_addr_hi =
			(u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
		nopout_wqe->num_bds = 1;
	}
	nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */

	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
	return 0;
}


/**
 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
 * @conn:	iscsi connection
 * @cmd:	driver command structure which is requesting
 *		a WQE to sent to chip for further processing
 *
 * prepare and post logout request WQE to CNIC firmware
 */
int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
			    struct iscsi_task *task)
{
	struct bnx2i_cmd *bnx2i_cmd;
	struct bnx2i_logout_request *logout_wqe;
	struct iscsi_logout *logout_hdr;

	bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
	logout_hdr = (struct iscsi_logout *)task->hdr;

	logout_wqe = (struct bnx2i_logout_request *)
						bnx2i_conn->ep->qp.sq_prod_qe;
	memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));

	logout_wqe->op_code = logout_hdr->opcode;
	logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
	logout_wqe->op_attr =
			logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
	logout_wqe->itt = ((u16)task->itt |
			   (ISCSI_TASK_TYPE_MPATH <<
			    ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
	logout_wqe->data_length = 0;
	logout_wqe->cid = 0;

	logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
	logout_wqe->bd_list_addr_hi = (u32)
				((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
	logout_wqe->num_bds = 1;
	logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */

	bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT;

	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
	return 0;
}


/**
 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
 * @conn:	iscsi connection which requires iscsi parameter update
 *
 * sends down iSCSI Conn Update request to move iSCSI conn to FFP
 */
void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
{
	struct bnx2i_conn *bnx2i_conn = conn->dd_data;
	struct bnx2i_hba *hba = bnx2i_conn->hba;
	struct kwqe *kwqe_arr[2];
	struct iscsi_kwqe_conn_update *update_wqe;
	struct iscsi_kwqe_conn_update conn_update_kwqe;

	update_wqe = &conn_update_kwqe;

	update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
	update_wqe->hdr.flags =
		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);

	/* 5771x requires conn context id to be passed as is */
	if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
		update_wqe->context_id = bnx2i_conn->ep->ep_cid;
	else
		update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
	update_wqe->conn_flags = 0;
	if (conn->hdrdgst_en)
		update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
	if (conn->datadgst_en)
		update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
	if (conn->session->initial_r2t_en)
		update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
	if (conn->session->imm_data_en)
		update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;

	update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
	update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
	update_wqe->first_burst_length = conn->session->first_burst;
	update_wqe->max_burst_length = conn->session->max_burst;
	update_wqe->exp_stat_sn = conn->exp_statsn;
	update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
	update_wqe->session_error_recovery_level = conn->session->erl;
	iscsi_conn_printk(KERN_ALERT, conn,
			  "bnx2i: conn update - MBL 0x%x FBL 0x%x"
			  "MRDSL_I 0x%x MRDSL_T 0x%x \n",
			  update_wqe->max_burst_length,
			  update_wqe->first_burst_length,
			  update_wqe->max_recv_pdu_length,
			  update_wqe->max_send_pdu_length);

	kwqe_arr[0] = (struct kwqe *) update_wqe;
	if (hba->cnic && hba->cnic->submit_kwqes)
		hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
}


/**
 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
 * @data:	endpoint (transport handle) structure pointer
 *
 * routine to handle connection offload/destroy request timeout
 */
void bnx2i_ep_ofld_timer(unsigned long data)
{
	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data;

	if (ep->state == EP_STATE_OFLD_START) {
		printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
		ep->state = EP_STATE_OFLD_FAILED;
	} else if (ep->state == EP_STATE_DISCONN_START) {
		printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
		ep->state = EP_STATE_DISCONN_TIMEDOUT;
	} else if (ep->state == EP_STATE_CLEANUP_START) {
		printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
		ep->state = EP_STATE_CLEANUP_FAILED;
	}

	wake_up_interruptible(&ep->ofld_wait);
}


static int bnx2i_power_of2(u32 val)
{
	u32 power = 0;
	if (val & (val - 1))
		return power;
	val--;
	while (val) {
		val = val >> 1;
		power++;
	}
	return power;
}


/**
 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
 * @hba:	adapter structure pointer
 * @cmd:	driver command structure which is requesting
 *		a WQE to sent to chip for further processing
 *
 * prepares and posts CONN_OFLD_REQ1/2 KWQE
 */
void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
{
	struct bnx2i_cleanup_request *cmd_cleanup;

	cmd_cleanup =
		(struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
	memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));

	cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
	cmd_cleanup->itt = cmd->req.itt;
	cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */

	bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
}


/**
 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
 * @hba:	adapter structure pointer
 * @ep:		endpoint (transport indentifier) structure
 *
 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
 * 	iscsi connection context clean-up process
 */
int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
{
	struct kwqe *kwqe_arr[2];
	struct iscsi_kwqe_conn_destroy conn_cleanup;
	int rc = -EINVAL;

	memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));

	conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
	conn_cleanup.hdr.flags =
		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
	/* 5771x requires conn context id to be passed as is */
	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
		conn_cleanup.context_id = ep->ep_cid;
	else
		conn_cleanup.context_id = (ep->ep_cid >> 7);

	conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;

	kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
	if (hba->cnic && hba->cnic->submit_kwqes)
		rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);

	return rc;
}


/**
 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
 * @hba: 		adapter structure pointer
 * @ep: 		endpoint (transport indentifier) structure
 *
 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 */
static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
					 struct bnx2i_endpoint *ep)
{
	struct kwqe *kwqe_arr[2];
	struct iscsi_kwqe_conn_offload1 ofld_req1;
	struct iscsi_kwqe_conn_offload2 ofld_req2;
	dma_addr_t dma_addr;
	int num_kwqes = 2;
	u32 *ptbl;
	int rc = -EINVAL;

	ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
	ofld_req1.hdr.flags =
		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);

	ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;

	dma_addr = ep->qp.sq_pgtbl_phys;
	ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
	ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);

	dma_addr = ep->qp.cq_pgtbl_phys;
	ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
	ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);

	ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
	ofld_req2.hdr.flags =
		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);

	dma_addr = ep->qp.rq_pgtbl_phys;
	ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
	ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);

	ptbl = (u32 *) ep->qp.sq_pgtbl_virt;

	ofld_req2.sq_first_pte.hi = *ptbl++;
	ofld_req2.sq_first_pte.lo = *ptbl;

	ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
	ofld_req2.cq_first_pte.hi = *ptbl++;
	ofld_req2.cq_first_pte.lo = *ptbl;

	kwqe_arr[0] = (struct kwqe *) &ofld_req1;
	kwqe_arr[1] = (struct kwqe *) &ofld_req2;
	ofld_req2.num_additional_wqes = 0;

	if (hba->cnic && hba->cnic->submit_kwqes)
		rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);

	return rc;
}


/**
 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
 * @hba: 		adapter structure pointer
 * @ep: 		endpoint (transport indentifier) structure
 *
 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 */
static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
					  struct bnx2i_endpoint *ep)
{
	struct kwqe *kwqe_arr[5];
	struct iscsi_kwqe_conn_offload1 ofld_req1;
	struct iscsi_kwqe_conn_offload2 ofld_req2;
	struct iscsi_kwqe_conn_offload3 ofld_req3[1];
	dma_addr_t dma_addr;
	int num_kwqes = 2;
	u32 *ptbl;
	int rc = -EINVAL;

	ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
	ofld_req1.hdr.flags =
		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);

	ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;

	dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
	ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
	ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);

	dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
	ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
	ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);

	ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
	ofld_req2.hdr.flags =
		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);

	dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
	ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
	ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);

	ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
	ofld_req2.sq_first_pte.hi = *ptbl++;
	ofld_req2.sq_first_pte.lo = *ptbl;

	ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
	ofld_req2.cq_first_pte.hi = *ptbl++;
	ofld_req2.cq_first_pte.lo = *ptbl;

	kwqe_arr[0] = (struct kwqe *) &ofld_req1;
	kwqe_arr[1] = (struct kwqe *) &ofld_req2;

	ofld_req2.num_additional_wqes = 1;
	memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
	ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
	ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
	ofld_req3[0].qp_first_pte[0].lo = *ptbl;

	kwqe_arr[2] = (struct kwqe *) ofld_req3;
	/* need if we decide to go with multiple KCQE's per conn */
	num_kwqes += 1;

	if (hba->cnic && hba->cnic->submit_kwqes)
		rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);

	return rc;
}

/**
 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
 *
 * @hba: 		adapter structure pointer
 * @ep: 		endpoint (transport indentifier) structure
 *
 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
 */
int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
{
	int rc;

	if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
		rc = bnx2i_5771x_send_conn_ofld_req(hba, ep);
	else
		rc = bnx2i_570x_send_conn_ofld_req(hba, ep);

	return rc;
}


/**
 * setup_qp_page_tables - iscsi QP page table setup function
 * @ep:		endpoint (transport indentifier) structure
 *
 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
 * 	64-bit address in big endian format. Whereas 10G/sec (57710) requires
 * 	PT in little endian format
 */
static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
{
	int num_pages;
	u32 *ptbl;
	dma_addr_t page;
	int cnic_dev_10g;

	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
		cnic_dev_10g = 1;
	else
		cnic_dev_10g = 0;

	/* SQ page table */
	memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
	num_pages = ep->qp.sq_mem_size / PAGE_SIZE;
	page = ep->qp.sq_phys;

	if (cnic_dev_10g)
		ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
	else
		ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
	while (num_pages--) {
		if (cnic_dev_10g) {
			/* PTE is written in little endian format for 57710 */
			*ptbl = (u32) page;
			ptbl++;
			*ptbl = (u32) ((u64) page >> 32);
			ptbl++;
			page += PAGE_SIZE;
		} else {
			/* PTE is written in big endian format for
			 * 5706/5708/5709 devices */
			*ptbl = (u32) ((u64) page >> 32);
			ptbl++;
			*ptbl = (u32) page;
			ptbl++;
			page += PAGE_SIZE;
		}
	}

	/* RQ page table */
	memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
	num_pages = ep->qp.rq_mem_size / PAGE_SIZE;
	page = ep->qp.rq_phys;

	if (cnic_dev_10g)
		ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
	else
		ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
	while (num_pages--) {
		if (cnic_dev_10g) {
			/* PTE is written in little endian format for 57710 */
			*ptbl = (u32) page;
			ptbl++;
			*ptbl = (u32) ((u64) page >> 32);
			ptbl++;
			page += PAGE_SIZE;
		} else {
			/* PTE is written in big endian format for
			 * 5706/5708/5709 devices */
			*ptbl = (u32) ((u64) page >> 32);
			ptbl++;
			*ptbl = (u32) page;
			ptbl++;
			page += PAGE_SIZE;
		}
	}

	/* CQ page table */
	memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
	num_pages = ep->qp.cq_mem_size / PAGE_SIZE;
	page = ep->qp.cq_phys;

	if (cnic_dev_10g)
		ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
	else
		ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
	while (num_pages--) {
		if (cnic_dev_10g) {
			/* PTE is written in little endian format for 57710 */
			*ptbl = (u32) page;
			ptbl++;
			*ptbl = (u32) ((u64) page >> 32);
			ptbl++;
			page += PAGE_SIZE;
		} else {
			/* PTE is written in big endian format for
			 * 5706/5708/5709 devices */
			*ptbl = (u32) ((u64) page >> 32);
			ptbl++;
			*ptbl = (u32) page;
			ptbl++;
			page += PAGE_SIZE;
		}
	}
}


/**
 * bnx2i_alloc_qp_resc - allocates required resources for QP.
 * @hba:	adapter structure pointer
 * @ep:		endpoint (transport indentifier) structure
 *
 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
 *	memory for SQ/RQ/CQ and page tables. EP structure elements such
 *	as producer/consumer indexes/pointers, queue sizes and page table
 *	contents are setup
 */
int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
{
	struct bnx2i_5771x_cq_db *cq_db;

	ep->hba = hba;
	ep->conn = NULL;
	ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;

	/* Allocate page table memory for SQ which is page aligned */
	ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
	ep->qp.sq_mem_size =
		(ep->qp.sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
	ep->qp.sq_pgtbl_size =
		(ep->qp.sq_mem_size / PAGE_SIZE) * sizeof(void *);
	ep->qp.sq_pgtbl_size =
		(ep->qp.sq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;

	ep->qp.sq_pgtbl_virt =
		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
				   &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
	if (!ep->qp.sq_pgtbl_virt) {
		printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
				  ep->qp.sq_pgtbl_size);
		goto mem_alloc_err;
	}

	/* Allocate memory area for actual SQ element */
	ep->qp.sq_virt =
		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
				   &ep->qp.sq_phys, GFP_KERNEL);
	if (!ep->qp.sq_virt) {
		printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
				  ep->qp.sq_mem_size);
		goto mem_alloc_err;
	}

	memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
	ep->qp.sq_first_qe = ep->qp.sq_virt;
	ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
	ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
	ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
	ep->qp.sq_prod_idx = 0;
	ep->qp.sq_cons_idx = 0;
	ep->qp.sqe_left = hba->max_sqes;

	/* Allocate page table memory for CQ which is page aligned */
	ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
	ep->qp.cq_mem_size =
		(ep->qp.cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
	ep->qp.cq_pgtbl_size =
		(ep->qp.cq_mem_size / PAGE_SIZE) * sizeof(void *);
	ep->qp.cq_pgtbl_size =
		(ep->qp.cq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;

	ep->qp.cq_pgtbl_virt =
		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
				   &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
	if (!ep->qp.cq_pgtbl_virt) {
		printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
				  ep->qp.cq_pgtbl_size);
		goto mem_alloc_err;
	}

	/* Allocate memory area for actual CQ element */
	ep->qp.cq_virt =
		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
				   &ep->qp.cq_phys, GFP_KERNEL);
	if (!ep->qp.cq_virt) {
		printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
				  ep->qp.cq_mem_size);
		goto mem_alloc_err;
	}
	memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);

	ep->qp.cq_first_qe = ep->qp.cq_virt;
	ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
	ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
	ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
	ep->qp.cq_prod_idx = 0;
	ep->qp.cq_cons_idx = 0;
	ep->qp.cqe_left = hba->max_cqes;
	ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
	ep->qp.cqe_size = hba->max_cqes;

	/* Invalidate all EQ CQE index, req only for 57710 */
	cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
	memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);

	/* Allocate page table memory for RQ which is page aligned */
	ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
	ep->qp.rq_mem_size =
		(ep->qp.rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
	ep->qp.rq_pgtbl_size =
		(ep->qp.rq_mem_size / PAGE_SIZE) * sizeof(void *);
	ep->qp.rq_pgtbl_size =
		(ep->qp.rq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;

	ep->qp.rq_pgtbl_virt =
		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
				   &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
	if (!ep->qp.rq_pgtbl_virt) {
		printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
				  ep->qp.rq_pgtbl_size);
		goto mem_alloc_err;
	}

	/* Allocate memory area for actual RQ element */
	ep->qp.rq_virt =
		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
				   &ep->qp.rq_phys, GFP_KERNEL);
	if (!ep->qp.rq_virt) {
		printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
				  ep->qp.rq_mem_size);
		goto mem_alloc_err;
	}

	ep->qp.rq_first_qe = ep->qp.rq_virt;
	ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
	ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
	ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
	ep->qp.rq_prod_idx = 0x8000;
	ep->qp.rq_cons_idx = 0;
	ep->qp.rqe_left = hba->max_rqes;

	setup_qp_page_tables(ep);

	return 0;

mem_alloc_err:
	bnx2i_free_qp_resc(hba, ep);
	return -ENOMEM;
}



/**
 * bnx2i_free_qp_resc - free memory resources held by QP
 * @hba:	adapter structure pointer
 * @ep:	endpoint (transport indentifier) structure
 *
 * Free QP resources - SQ/RQ/CQ memory and page tables.
 */
void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
{
	if (ep->qp.ctx_base) {
		iounmap(ep->qp.ctx_base);
		ep->qp.ctx_base = NULL;
	}
	/* Free SQ mem */
	if (ep->qp.sq_pgtbl_virt) {
		dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
				  ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
		ep->qp.sq_pgtbl_virt = NULL;
		ep->qp.sq_pgtbl_phys = 0;
	}
	if (ep->qp.sq_virt) {
		dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
				  ep->qp.sq_virt, ep->qp.sq_phys);
		ep->qp.sq_virt = NULL;
		ep->qp.sq_phys = 0;
	}

	/* Free RQ mem */
	if (ep->qp.rq_pgtbl_virt) {
		dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
				  ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
		ep->qp.rq_pgtbl_virt = NULL;
		ep->qp.rq_pgtbl_phys = 0;
	}
	if (ep->qp.rq_virt) {
		dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
				  ep->qp.rq_virt, ep->qp.rq_phys);
		ep->qp.rq_virt = NULL;
		ep->qp.rq_phys = 0;
	}

	/* Free CQ mem */
	if (ep->qp.cq_pgtbl_virt) {
		dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
				  ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
		ep->qp.cq_pgtbl_virt = NULL;
		ep->qp.cq_pgtbl_phys = 0;
	}
	if (ep->qp.cq_virt) {
		dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
				  ep->qp.cq_virt, ep->qp.cq_phys);
		ep->qp.cq_virt = NULL;
		ep->qp.cq_phys = 0;
	}
}


/**
 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
 * @hba:	adapter structure pointer
 *
 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
 * 	This results in iSCSi support validation and on-chip context manager
 * 	initialization.  Firmware completes this handshake with a CQE carrying
 * 	the result of iscsi support validation. Parameter carried by
 * 	iscsi init request determines the number of offloaded connection and
 * 	tolerance level for iscsi protocol violation this hba/chip can support
 */
int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
{
	struct kwqe *kwqe_arr[3];
	struct iscsi_kwqe_init1 iscsi_init;
	struct iscsi_kwqe_init2 iscsi_init2;
	int rc = 0;
	u64 mask64;

	bnx2i_adjust_qp_size(hba);

	iscsi_init.flags =
		ISCSI_PAGE_SIZE_4K << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
	if (en_tcp_dack)
		iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
	iscsi_init.reserved0 = 0;
	iscsi_init.num_cqs = 1;
	iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
	iscsi_init.hdr.flags =
		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);

	iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
	iscsi_init.dummy_buffer_addr_hi =
		(u32) ((u64) hba->dummy_buf_dma >> 32);

	hba->num_ccell = hba->max_sqes >> 1;
	hba->ctx_ccell_tasks =
			((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
	iscsi_init.num_ccells_per_conn = hba->num_ccell;
	iscsi_init.num_tasks_per_conn = hba->max_sqes;
	iscsi_init.sq_wqes_per_page = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
	iscsi_init.sq_num_wqes = hba->max_sqes;
	iscsi_init.cq_log_wqes_per_page =
		(u8) bnx2i_power_of2(PAGE_SIZE / BNX2I_CQE_SIZE);
	iscsi_init.cq_num_wqes = hba->max_cqes;
	iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
				   (PAGE_SIZE - 1)) / PAGE_SIZE;
	iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
				   (PAGE_SIZE - 1)) / PAGE_SIZE;
	iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
	iscsi_init.rq_num_wqes = hba->max_rqes;


	iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
	iscsi_init2.hdr.flags =
		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
	iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
	mask64 = 0x0ULL;
	mask64 |= (
		/* CISCO MDS */
		(1UL <<
		  ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
		/* HP MSA1510i */
		(1UL <<
		  ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
		/* EMC */
		(1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
	if (error_mask1) {
		iscsi_init2.error_bit_map[0] = error_mask1;
		mask64 &= (u32)(~mask64);
		mask64 |= error_mask1;
	} else
		iscsi_init2.error_bit_map[0] = (u32) mask64;

	if (error_mask2) {
		iscsi_init2.error_bit_map[1] = error_mask2;
		mask64 &= 0xffffffff;
		mask64 |= ((u64)error_mask2 << 32);
	} else
		iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);

	iscsi_error_mask = mask64;

	kwqe_arr[0] = (struct kwqe *) &iscsi_init;
	kwqe_arr[1] = (struct kwqe *) &iscsi_init2;

	if (hba->cnic && hba->cnic->submit_kwqes)
		rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
	return rc;
}


/**
 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
 * @session:	iscsi session
 * @bnx2i_conn:	bnx2i connection
 * @cqe:	pointer to newly DMA'ed CQE entry for processing
 *
 * process SCSI CMD Response CQE & complete the request to SCSI-ML
 */
int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
				struct bnx2i_conn *bnx2i_conn,
				struct cqe *cqe)
{
	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
	struct bnx2i_cmd_response *resp_cqe;
	struct bnx2i_cmd *bnx2i_cmd;
	struct iscsi_task *task;
	struct iscsi_scsi_rsp *hdr;
	u32 datalen = 0;

	resp_cqe = (struct bnx2i_cmd_response *)cqe;
	spin_lock_bh(&session->lock);
	task = iscsi_itt_to_task(conn,
				 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
	if (!task)
		goto fail;

	bnx2i_cmd = task->dd_data;

	if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
		conn->datain_pdus_cnt +=
			resp_cqe->task_stat.read_stat.num_data_outs;
		conn->rxdata_octets +=
			bnx2i_cmd->req.total_data_transfer_length;
	} else {
		conn->dataout_pdus_cnt +=
			resp_cqe->task_stat.read_stat.num_data_outs;
		conn->r2t_pdus_cnt +=
			resp_cqe->task_stat.read_stat.num_r2ts;
		conn->txdata_octets +=
			bnx2i_cmd->req.total_data_transfer_length;
	}
	bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);

	hdr = (struct iscsi_scsi_rsp *)task->hdr;
	resp_cqe = (struct bnx2i_cmd_response *)cqe;
	hdr->opcode = resp_cqe->op_code;
	hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
	hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
	hdr->response = resp_cqe->response;
	hdr->cmd_status = resp_cqe->status;
	hdr->flags = resp_cqe->response_flags;
	hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);

	if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
		goto done;

	if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
		datalen = resp_cqe->data_length;
		if (datalen < 2)
			goto done;

		if (datalen > BNX2I_RQ_WQE_SIZE) {
			iscsi_conn_printk(KERN_ERR, conn,
					  "sense data len %d > RQ sz\n",
					  datalen);
			datalen = BNX2I_RQ_WQE_SIZE;
		} else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
			iscsi_conn_printk(KERN_ERR, conn,
					  "sense data len %d > conn data\n",
					  datalen);
			datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
		}

		bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
		bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
	}

done:
	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
			     conn->data, datalen);
fail:
	spin_unlock_bh(&session->lock);
	return 0;
}


/**
 * bnx2i_process_login_resp - this function handles iscsi login response
 * @session:		iscsi session pointer
 * @bnx2i_conn:		iscsi connection pointer
 * @cqe:		pointer to newly DMA'ed CQE entry for processing
 *
 * process Login Response CQE & complete it to open-iscsi user daemon
 */
static int bnx2i_process_login_resp(struct iscsi_session *session,
				    struct bnx2i_conn *bnx2i_conn,
				    struct cqe *cqe)
{
	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
	struct iscsi_task *task;
	struct bnx2i_login_response *login;
	struct iscsi_login_rsp *resp_hdr;
	int pld_len;
	int pad_len;

	login = (struct bnx2i_login_response *) cqe;
	spin_lock(&session->lock);
	task = iscsi_itt_to_task(conn,
				 login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
	if (!task)
		goto done;

	resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
	resp_hdr->opcode = login->op_code;
	resp_hdr->flags = login->response_flags;
	resp_hdr->max_version = login->version_max;
	resp_hdr->active_version = login->version_active;
	resp_hdr->hlength = 0;

	hton24(resp_hdr->dlength, login->data_length);
	memcpy(resp_hdr->isid, &login->isid_lo, 6);
	resp_hdr->tsih = cpu_to_be16(login->tsih);
	resp_hdr->itt = task->hdr->itt;
	resp_hdr->statsn = cpu_to_be32(login->stat_sn);
	resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
	resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
	resp_hdr->status_class = login->status_class;
	resp_hdr->status_detail = login->status_detail;
	pld_len = login->data_length;
	bnx2i_conn->gen_pdu.resp_wr_ptr =
					bnx2i_conn->gen_pdu.resp_buf + pld_len;

	pad_len = 0;
	if (pld_len & 0x3)
		pad_len = 4 - (pld_len % 4);

	if (pad_len) {
		int i = 0;
		for (i = 0; i < pad_len; i++) {
			bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
			bnx2i_conn->gen_pdu.resp_wr_ptr++;
		}
	}

	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
		bnx2i_conn->gen_pdu.resp_buf,
		bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
done:
	spin_unlock(&session->lock);
	return 0;
}


/**
 * bnx2i_process_text_resp - this function handles iscsi text response
 * @session:	iscsi session pointer
 * @bnx2i_conn:	iscsi connection pointer
 * @cqe:	pointer to newly DMA'ed CQE entry for processing
 *
 * process iSCSI Text Response CQE&  complete it to open-iscsi user daemon
 */
static int bnx2i_process_text_resp(struct iscsi_session *session,
				   struct bnx2i_conn *bnx2i_conn,
				   struct cqe *cqe)
{
	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
	struct iscsi_task *task;
	struct bnx2i_text_response *text;
	struct iscsi_text_rsp *resp_hdr;
	int pld_len;
	int pad_len;

	text = (struct bnx2i_text_response *) cqe;
	spin_lock(&session->lock);
	task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX);
	if (!task)
		goto done;

	resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr;
	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
	resp_hdr->opcode = text->op_code;
	resp_hdr->flags = text->response_flags;
	resp_hdr->hlength = 0;

	hton24(resp_hdr->dlength, text->data_length);
	resp_hdr->itt = task->hdr->itt;
	resp_hdr->ttt = cpu_to_be32(text->ttt);
	resp_hdr->statsn = task->hdr->exp_statsn;
	resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn);
	resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn);
	pld_len = text->data_length;
	bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf +
					  pld_len;
	pad_len = 0;
	if (pld_len & 0x3)
		pad_len = 4 - (pld_len % 4);

	if (pad_len) {
		int i = 0;
		for (i = 0; i < pad_len; i++) {
			bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
			bnx2i_conn->gen_pdu.resp_wr_ptr++;
		}
	}
	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
			     bnx2i_conn->gen_pdu.resp_buf,
			     bnx2i_conn->gen_pdu.resp_wr_ptr -
			     bnx2i_conn->gen_pdu.resp_buf);
done:
	spin_unlock(&session->lock);
	return 0;
}


/**
 * bnx2i_process_tmf_resp - this function handles iscsi TMF response
 * @session:		iscsi session pointer
 * @bnx2i_conn:		iscsi connection pointer
 * @cqe:		pointer to newly DMA'ed CQE entry for processing
 *
 * process iSCSI TMF Response CQE and wake up the driver eh thread.
 */
static int bnx2i_process_tmf_resp(struct iscsi_session *session,
				  struct bnx2i_conn *bnx2i_conn,
				  struct cqe *cqe)
{
	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
	struct iscsi_task *task;
	struct bnx2i_tmf_response *tmf_cqe;
	struct iscsi_tm_rsp *resp_hdr;

	tmf_cqe = (struct bnx2i_tmf_response *)cqe;
	spin_lock(&session->lock);
	task = iscsi_itt_to_task(conn,
				 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
	if (!task)
		goto done;

	resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
	resp_hdr->opcode = tmf_cqe->op_code;
	resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
	resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
	resp_hdr->itt = task->hdr->itt;
	resp_hdr->response = tmf_cqe->response;

	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
done:
	spin_unlock(&session->lock);
	return 0;
}

/**
 * bnx2i_process_logout_resp - this function handles iscsi logout response
 * @session:		iscsi session pointer
 * @bnx2i_conn:		iscsi connection pointer
 * @cqe:		pointer to newly DMA'ed CQE entry for processing
 *
 * process iSCSI Logout Response CQE & make function call to
 * notify the user daemon.
 */
static int bnx2i_process_logout_resp(struct iscsi_session *session,
				     struct bnx2i_conn *bnx2i_conn,
				     struct cqe *cqe)
{
	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
	struct iscsi_task *task;
	struct bnx2i_logout_response *logout;
	struct iscsi_logout_rsp *resp_hdr;

	logout = (struct bnx2i_logout_response *) cqe;
	spin_lock(&session->lock);
	task = iscsi_itt_to_task(conn,
				 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
	if (!task)
		goto done;

	resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
	resp_hdr->opcode = logout->op_code;
	resp_hdr->flags = logout->response;
	resp_hdr->hlength = 0;

	resp_hdr->itt = task->hdr->itt;
	resp_hdr->statsn = task->hdr->exp_statsn;
	resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
	resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);

	resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
	resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);

	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);

	bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD;
done:
	spin_unlock(&session->lock);
	return 0;
}

/**
 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
 * @session:		iscsi session pointer
 * @bnx2i_conn:		iscsi connection pointer
 * @cqe:		pointer to newly DMA'ed CQE entry for processing
 *
 * process iSCSI NOPIN local completion CQE, frees IIT and command structures
 */
static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
					   struct bnx2i_conn *bnx2i_conn,
					   struct cqe *cqe)
{
	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
	struct bnx2i_nop_in_msg *nop_in;
	struct iscsi_task *task;

	nop_in = (struct bnx2i_nop_in_msg *)cqe;
	spin_lock(&session->lock);
	task = iscsi_itt_to_task(conn,
				 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
	if (task)
		__iscsi_put_task(task);
	spin_unlock(&session->lock);
}

/**
 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
 * @conn:	iscsi connection
 *
 * Firmware advances RQ producer index for every unsolicited PDU even if
 *	payload data length is '0'. This function makes corresponding
 *	adjustments on the driver side to match this f/w behavior
 */
static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
{
	char dummy_rq_data[2];
	bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
	bnx2i_put_rq_buf(bnx2i_conn, 1);
}


/**
 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
 * @session:		iscsi session pointer
 * @bnx2i_conn:		iscsi connection pointer
 * @cqe:		pointer to newly DMA'ed CQE entry for processing
 *
 * process iSCSI target's proactive iSCSI NOPIN request
 */
static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
				     struct bnx2i_conn *bnx2i_conn,
				     struct cqe *cqe)
{
	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
	struct iscsi_task *task;
	struct bnx2i_nop_in_msg *nop_in;
	struct iscsi_nopin *hdr;
	int tgt_async_nop = 0;

	nop_in = (struct bnx2i_nop_in_msg *)cqe;

	spin_lock(&session->lock);
	hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
	memset(hdr, 0, sizeof(struct iscsi_hdr));
	hdr->opcode = nop_in->op_code;
	hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
	hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
	hdr->ttt = cpu_to_be32(nop_in->ttt);

	if (nop_in->itt == (u16) RESERVED_ITT) {
		bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
		hdr->itt = RESERVED_ITT;
		tgt_async_nop = 1;
		goto done;
	}

	/* this is a response to one of our nop-outs */
	task = iscsi_itt_to_task(conn,
			 (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX));
	if (task) {
		hdr->flags = ISCSI_FLAG_CMD_FINAL;
		hdr->itt = task->hdr->itt;
		hdr->ttt = cpu_to_be32(nop_in->ttt);
		memcpy(&hdr->lun, nop_in->lun, 8);
	}
done:
	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
	spin_unlock(&session->lock);

	return tgt_async_nop;
}


/**
 * bnx2i_process_async_mesg - this function handles iscsi async message
 * @session:		iscsi session pointer
 * @bnx2i_conn:		iscsi connection pointer
 * @cqe:		pointer to newly DMA'ed CQE entry for processing
 *
 * process iSCSI ASYNC Message
 */
static void bnx2i_process_async_mesg(struct iscsi_session *session,
				     struct bnx2i_conn *bnx2i_conn,
				     struct cqe *cqe)
{
	struct bnx2i_async_msg *async_cqe;
	struct iscsi_async *resp_hdr;
	u8 async_event;

	bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);

	async_cqe = (struct bnx2i_async_msg *)cqe;
	async_event = async_cqe->async_event;

	if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
		iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
				  "async: scsi events not supported\n");
		return;
	}

	spin_lock(&session->lock);
	resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
	resp_hdr->opcode = async_cqe->op_code;
	resp_hdr->flags = 0x80;

	memcpy(&resp_hdr->lun, async_cqe->lun, 8);
	resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
	resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);

	resp_hdr->async_event = async_cqe->async_event;
	resp_hdr->async_vcode = async_cqe->async_vcode;

	resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
	resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
	resp_hdr->param3 = cpu_to_be16(async_cqe->param3);

	__iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
			     (struct iscsi_hdr *)resp_hdr, NULL, 0);
	spin_unlock(&session->lock);
}


/**
 * bnx2i_process_reject_mesg - process iscsi reject pdu
 * @session:		iscsi session pointer
 * @bnx2i_conn:		iscsi connection pointer
 * @cqe:		pointer to newly DMA'ed CQE entry for processing
 *
 * process iSCSI REJECT message
 */
static void bnx2i_process_reject_mesg(struct iscsi_session *session,
				      struct bnx2i_conn *bnx2i_conn,
				      struct cqe *cqe)
{
	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
	struct bnx2i_reject_msg *reject;
	struct iscsi_reject *hdr;

	reject = (struct bnx2i_reject_msg *) cqe;
	if (reject->data_length) {
		bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
		bnx2i_put_rq_buf(bnx2i_conn, 1);
	} else
		bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);

	spin_lock(&session->lock);
	hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
	memset(hdr, 0, sizeof(struct iscsi_hdr));
	hdr->opcode = reject->op_code;
	hdr->reason = reject->reason;
	hton24(hdr->dlength, reject->data_length);
	hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
	hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
	hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
			     reject->data_length);
	spin_unlock(&session->lock);
}

/**
 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
 * @session:		iscsi session pointer
 * @bnx2i_conn:		iscsi connection pointer
 * @cqe:		pointer to newly DMA'ed CQE entry for processing
 *
 * process command cleanup response CQE during conn shutdown or error recovery
 */
static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
					   struct bnx2i_conn *bnx2i_conn,
					   struct cqe *cqe)
{
	struct bnx2i_cleanup_response *cmd_clean_rsp;
	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
	struct iscsi_task *task;

	cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
	spin_lock(&session->lock);
	task = iscsi_itt_to_task(conn,
			cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
	if (!task)
		printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
			cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
	spin_unlock(&session->lock);
	complete(&bnx2i_conn->cmd_cleanup_cmpl);
}


/**
 * bnx2i_percpu_io_thread - thread per cpu for ios
 *
 * @arg:	ptr to bnx2i_percpu_info structure
 */
int bnx2i_percpu_io_thread(void *arg)
{
	struct bnx2i_percpu_s *p = arg;
	struct bnx2i_work *work, *tmp;
	LIST_HEAD(work_list);

	set_user_nice(current, -20);

	while (!kthread_should_stop()) {
		spin_lock_bh(&p->p_work_lock);
		while (!list_empty(&p->work_list)) {
			list_splice_init(&p->work_list, &work_list);
			spin_unlock_bh(&p->p_work_lock);

			list_for_each_entry_safe(work, tmp, &work_list, list) {
				list_del_init(&work->list);
				/* work allocated in the bh, freed here */
				bnx2i_process_scsi_cmd_resp(work->session,
							    work->bnx2i_conn,
							    &work->cqe);
				atomic_dec(&work->bnx2i_conn->work_cnt);
				kfree(work);
			}
			spin_lock_bh(&p->p_work_lock);
		}
		set_current_state(TASK_INTERRUPTIBLE);
		spin_unlock_bh(&p->p_work_lock);
		schedule();
	}
	__set_current_state(TASK_RUNNING);

	return 0;
}


/**
 * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread
 * @bnx2i_conn:		bnx2i connection
 *
 * this function is called by generic KCQ handler to queue all pending cmd
 * completion CQEs
 *
 * The implementation is to queue the cmd response based on the
 * last recorded command for the given connection.  The
 * cpu_id gets recorded upon task_xmit.  No out-of-order completion!
 */
static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session,
				     struct bnx2i_conn *bnx2i_conn,
				     struct bnx2i_nop_in_msg *cqe)
{
	struct bnx2i_work *bnx2i_work = NULL;
	struct bnx2i_percpu_s *p = NULL;
	struct iscsi_task *task;
	struct scsi_cmnd *sc;
	int rc = 0;
	int cpu;

	spin_lock(&session->lock);
	task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data,
				 cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
	if (!task || !task->sc) {
		spin_unlock(&session->lock);
		return -EINVAL;
	}
	sc = task->sc;

	if (!blk_rq_cpu_valid(sc->request))
		cpu = smp_processor_id();
	else
		cpu = sc->request->cpu;

	spin_unlock(&session->lock);

	p = &per_cpu(bnx2i_percpu, cpu);
	spin_lock(&p->p_work_lock);
	if (unlikely(!p->iothread)) {
		rc = -EINVAL;
		goto err;
	}
	/* Alloc and copy to the cqe */
	bnx2i_work = kzalloc(sizeof(struct bnx2i_work), GFP_ATOMIC);
	if (bnx2i_work) {
		INIT_LIST_HEAD(&bnx2i_work->list);
		bnx2i_work->session = session;
		bnx2i_work->bnx2i_conn = bnx2i_conn;
		memcpy(&bnx2i_work->cqe, cqe, sizeof(struct cqe));
		list_add_tail(&bnx2i_work->list, &p->work_list);
		atomic_inc(&bnx2i_conn->work_cnt);
		wake_up_process(p->iothread);
		spin_unlock(&p->p_work_lock);
		goto done;
	} else
		rc = -ENOMEM;
err:
	spin_unlock(&p->p_work_lock);
	bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe);
done:
	return rc;
}


/**
 * bnx2i_process_new_cqes - process newly DMA'ed CQE's
 * @bnx2i_conn:		bnx2i connection
 *
 * this function is called by generic KCQ handler to process all pending CQE's
 */
static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
{
	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
	struct iscsi_session *session = conn->session;
	struct qp_info *qp;
	struct bnx2i_nop_in_msg *nopin;
	int tgt_async_msg;
	int cqe_cnt = 0;

	if (bnx2i_conn->ep == NULL)
		return 0;

	qp = &bnx2i_conn->ep->qp;

	if (!qp->cq_virt) {
		printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!",
			bnx2i_conn->hba->netdev->name);
		goto out;
	}
	while (1) {
		nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
		if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
			break;

		if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) {
			if (nopin->op_code == ISCSI_OP_NOOP_IN &&
			    nopin->itt == (u16) RESERVED_ITT) {
				printk(KERN_ALERT "bnx2i: Unsolicited "
					"NOP-In detected for suspended "
					"connection dev=%s!\n",
					bnx2i_conn->hba->netdev->name);
				bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
				goto cqe_out;
			}
			break;
		}
		tgt_async_msg = 0;

		switch (nopin->op_code) {
		case ISCSI_OP_SCSI_CMD_RSP:
		case ISCSI_OP_SCSI_DATA_IN:
			/* Run the kthread engine only for data cmds
			   All other cmds will be completed in this bh! */
			bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin);
			break;
		case ISCSI_OP_LOGIN_RSP:
			bnx2i_process_login_resp(session, bnx2i_conn,
						 qp->cq_cons_qe);
			break;
		case ISCSI_OP_SCSI_TMFUNC_RSP:
			bnx2i_process_tmf_resp(session, bnx2i_conn,
					       qp->cq_cons_qe);
			break;
		case ISCSI_OP_TEXT_RSP:
			bnx2i_process_text_resp(session, bnx2i_conn,
						qp->cq_cons_qe);
			break;
		case ISCSI_OP_LOGOUT_RSP:
			bnx2i_process_logout_resp(session, bnx2i_conn,
						  qp->cq_cons_qe);
			break;
		case ISCSI_OP_NOOP_IN:
			if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
						     qp->cq_cons_qe))
				tgt_async_msg = 1;
			break;
		case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
			bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
						       qp->cq_cons_qe);
			break;
		case ISCSI_OP_ASYNC_EVENT:
			bnx2i_process_async_mesg(session, bnx2i_conn,
						 qp->cq_cons_qe);
			tgt_async_msg = 1;
			break;
		case ISCSI_OP_REJECT:
			bnx2i_process_reject_mesg(session, bnx2i_conn,
						  qp->cq_cons_qe);
			break;
		case ISCSI_OPCODE_CLEANUP_RESPONSE:
			bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
						       qp->cq_cons_qe);
			break;
		default:
			printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
					  nopin->op_code);
		}
		if (!tgt_async_msg) {
			if (!atomic_read(&bnx2i_conn->ep->num_active_cmds))
				printk(KERN_ALERT "bnx2i (%s): no active cmd! "
				       "op 0x%x\n",
				       bnx2i_conn->hba->netdev->name,
				       nopin->op_code);
			else
				atomic_dec(&bnx2i_conn->ep->num_active_cmds);
		}
cqe_out:
		/* clear out in production version only, till beta keep opcode
		 * field intact, will be helpful in debugging (context dump)
		 * nopin->op_code = 0;
		 */
		cqe_cnt++;
		qp->cqe_exp_seq_sn++;
		if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
			qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;

		if (qp->cq_cons_qe == qp->cq_last_qe) {
			qp->cq_cons_qe = qp->cq_first_qe;
			qp->cq_cons_idx = 0;
		} else {
			qp->cq_cons_qe++;
			qp->cq_cons_idx++;
		}
	}
out:
	return cqe_cnt;
}

/**
 * bnx2i_fastpath_notification - process global event queue (KCQ)
 * @hba:		adapter structure pointer
 * @new_cqe_kcqe:	pointer to newly DMA'ed KCQE entry
 *
 * Fast path event notification handler, KCQ entry carries context id
 *	of the connection that has 1 or more pending CQ entries
 */
static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
					struct iscsi_kcqe *new_cqe_kcqe)
{
	struct bnx2i_conn *bnx2i_conn;
	u32 iscsi_cid;
	int nxt_idx;

	iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
	bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);

	if (!bnx2i_conn) {
		printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
		return;
	}
	if (!bnx2i_conn->ep) {
		printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
		return;
	}

	bnx2i_process_new_cqes(bnx2i_conn);
	nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep,
						CNIC_ARM_CQE_FP);
	if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn))
		bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP);
}


/**
 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
 * @hba:		adapter structure pointer
 * @update_kcqe:	kcqe pointer
 *
 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
 */
static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
					   struct iscsi_kcqe *update_kcqe)
{
	struct bnx2i_conn *conn;
	u32 iscsi_cid;

	iscsi_cid = update_kcqe->iscsi_conn_id;
	conn = bnx2i_get_conn_from_id(hba, iscsi_cid);

	if (!conn) {
		printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
		return;
	}
	if (!conn->ep) {
		printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
		return;
	}

	if (update_kcqe->completion_status) {
		printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
		conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
	} else
		conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;

	wake_up_interruptible(&conn->ep->ofld_wait);
}


/**
 * bnx2i_recovery_que_add_conn - add connection to recovery queue
 * @hba:		adapter structure pointer
 * @bnx2i_conn:		iscsi connection
 *
 * Add connection to recovery queue and schedule adapter eh worker
 */
static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
					struct bnx2i_conn *bnx2i_conn)
{
	iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
			   ISCSI_ERR_CONN_FAILED);
}


/**
 * bnx2i_process_tcp_error - process error notification on a given connection
 *
 * @hba: 		adapter structure pointer
 * @tcp_err: 		tcp error kcqe pointer
 *
 * handles tcp level error notifications from FW.
 */
static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
				    struct iscsi_kcqe *tcp_err)
{
	struct bnx2i_conn *bnx2i_conn;
	u32 iscsi_cid;

	iscsi_cid = tcp_err->iscsi_conn_id;
	bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);

	if (!bnx2i_conn) {
		printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
		return;
	}

	printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
			  iscsi_cid, tcp_err->completion_status);
	bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
}


/**
 * bnx2i_process_iscsi_error - process error notification on a given connection
 * @hba:		adapter structure pointer
 * @iscsi_err:		iscsi error kcqe pointer
 *
 * handles iscsi error notifications from the FW. Firmware based in initial
 *	handshake classifies iscsi protocol / TCP rfc violation into either
 *	warning or error indications. If indication is of "Error" type, driver
 *	will initiate session recovery for that connection/session. For
 *	"Warning" type indication, driver will put out a system log message
 *	(there will be only one message for each type for the life of the
 *	session, this is to avoid un-necessarily overloading the system)
 */
static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
				      struct iscsi_kcqe *iscsi_err)
{
	struct bnx2i_conn *bnx2i_conn;
	u32 iscsi_cid;
	char warn_notice[] = "iscsi_warning";
	char error_notice[] = "iscsi_error";
	char additional_notice[64];
	char *message;
	int need_recovery;
	u64 err_mask64;

	iscsi_cid = iscsi_err->iscsi_conn_id;
	bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
	if (!bnx2i_conn) {
		printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
		return;
	}

	err_mask64 = (0x1ULL << iscsi_err->completion_status);

	if (err_mask64 & iscsi_error_mask) {
		need_recovery = 0;
		message = warn_notice;
	} else {
		need_recovery = 1;
		message = error_notice;
	}

	switch (iscsi_err->completion_status) {
	case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
		strcpy(additional_notice, "hdr digest err");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
		strcpy(additional_notice, "data digest err");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
		strcpy(additional_notice, "wrong opcode rcvd");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
		strcpy(additional_notice, "AHS len > 0 rcvd");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
		strcpy(additional_notice, "invalid ITT rcvd");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
		strcpy(additional_notice, "wrong StatSN rcvd");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
		strcpy(additional_notice, "wrong DataSN rcvd");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
		strcpy(additional_notice, "pend R2T violation");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
		strcpy(additional_notice, "ERL0, UO");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
		strcpy(additional_notice, "ERL0, U1");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
		strcpy(additional_notice, "ERL0, U2");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
		strcpy(additional_notice, "ERL0, U3");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
		strcpy(additional_notice, "ERL0, U4");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
		strcpy(additional_notice, "ERL0, U5");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
		strcpy(additional_notice, "ERL0, U6");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
		strcpy(additional_notice, "invalid resi len");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
		strcpy(additional_notice, "MRDSL violation");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
		strcpy(additional_notice, "F-bit not set");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
		strcpy(additional_notice, "invalid TTT");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
		strcpy(additional_notice, "invalid DataSN");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
		strcpy(additional_notice, "burst len violation");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
		strcpy(additional_notice, "buf offset violation");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
		strcpy(additional_notice, "invalid LUN field");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
		strcpy(additional_notice, "invalid R2TSN field");
		break;
#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 	\
	ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
	case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
		strcpy(additional_notice, "invalid cmd len1");
		break;
#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 	\
	ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
	case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
		strcpy(additional_notice, "invalid cmd len2");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
		strcpy(additional_notice,
		       "pend r2t exceeds MaxOutstandingR2T value");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
		strcpy(additional_notice, "TTT is rsvd");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
		strcpy(additional_notice, "MBL violation");
		break;
#define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO 	\
	ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
	case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
		strcpy(additional_notice, "data seg len != 0");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
		strcpy(additional_notice, "reject pdu len error");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
		strcpy(additional_notice, "async pdu len error");
		break;
	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
		strcpy(additional_notice, "nopin pdu len error");
		break;
#define BNX2_ERR_PEND_R2T_IN_CLEANUP			\
	ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
	case BNX2_ERR_PEND_R2T_IN_CLEANUP:
		strcpy(additional_notice, "pend r2t in cleanup");
		break;

	case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
		strcpy(additional_notice, "IP fragments rcvd");
		break;
	case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
		strcpy(additional_notice, "IP options error");
		break;
	case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
		strcpy(additional_notice, "urgent flag error");
		break;
	default:
		printk(KERN_ALERT "iscsi_err - unknown err %x\n",
				  iscsi_err->completion_status);
	}

	if (need_recovery) {
		iscsi_conn_printk(KERN_ALERT,
				  bnx2i_conn->cls_conn->dd_data,
				  "bnx2i: %s - %s\n",
				  message, additional_notice);

		iscsi_conn_printk(KERN_ALERT,
				  bnx2i_conn->cls_conn->dd_data,
				  "conn_err - hostno %d conn %p, "
				  "iscsi_cid %x cid %x\n",
				  bnx2i_conn->hba->shost->host_no,
				  bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
				  bnx2i_conn->ep->ep_cid);
		bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
	} else
		if (!test_and_set_bit(iscsi_err->completion_status,
				      (void *) &bnx2i_conn->violation_notified))
			iscsi_conn_printk(KERN_ALERT,
					  bnx2i_conn->cls_conn->dd_data,
					  "bnx2i: %s - %s\n",
					  message, additional_notice);
}


/**
 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
 * @hba:		adapter structure pointer
 * @conn_destroy:	conn destroy kcqe pointer
 *
 * handles connection destroy completion request.
 */
static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
					    struct iscsi_kcqe *conn_destroy)
{
	struct bnx2i_endpoint *ep;

	ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
	if (!ep) {
		printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
				  "offload request, unexpected complection\n");
		return;
	}

	if (hba != ep->hba) {
		printk(KERN_ALERT "conn destroy- error hba mis-match\n");
		return;
	}

	if (conn_destroy->completion_status) {
		printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
		ep->state = EP_STATE_CLEANUP_FAILED;
	} else
		ep->state = EP_STATE_CLEANUP_CMPL;
	wake_up_interruptible(&ep->ofld_wait);
}


/**
 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
 * @hba:		adapter structure pointer
 * @ofld_kcqe:		conn offload kcqe pointer
 *
 * handles initial connection offload completion, ep_connect() thread is
 *	woken-up to continue with LLP connect process
 */
static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
				    struct iscsi_kcqe *ofld_kcqe)
{
	u32 cid_addr;
	struct bnx2i_endpoint *ep;
	u32 cid_num;

	ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
	if (!ep) {
		printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
		return;
	}

	if (hba != ep->hba) {
		printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
		return;
	}

	if (ofld_kcqe->completion_status) {
		ep->state = EP_STATE_OFLD_FAILED;
		if (ofld_kcqe->completion_status ==
		    ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
			printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable "
				"to allocate iSCSI context resources\n",
				hba->netdev->name);
		else if (ofld_kcqe->completion_status ==
			 ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE)
			printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
				"opcode\n", hba->netdev->name);
		else if (ofld_kcqe->completion_status ==
			 ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY)
			/* error status code valid only for 5771x chipset */
			ep->state = EP_STATE_OFLD_FAILED_CID_BUSY;
		else
			printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
				"error code %d\n", hba->netdev->name,
				ofld_kcqe->completion_status);
	} else {
		ep->state = EP_STATE_OFLD_COMPL;
		cid_addr = ofld_kcqe->iscsi_conn_context_id;
		cid_num = bnx2i_get_cid_num(ep);
		ep->ep_cid = cid_addr;
		ep->qp.ctx_base = NULL;
	}
	wake_up_interruptible(&ep->ofld_wait);
}

/**
 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
 * @hba:		adapter structure pointer
 * @update_kcqe:	kcqe pointer
 *
 * Generic KCQ event handler/dispatcher
 */
static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
				u32 num_cqe)
{
	struct bnx2i_hba *hba = context;
	int i = 0;
	struct iscsi_kcqe *ikcqe = NULL;

	while (i < num_cqe) {
		ikcqe = (struct iscsi_kcqe *) kcqe[i++];

		if (ikcqe->op_code ==
		    ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
			bnx2i_fastpath_notification(hba, ikcqe);
		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
			bnx2i_process_ofld_cmpl(hba, ikcqe);
		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
			bnx2i_process_update_conn_cmpl(hba, ikcqe);
		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
			if (ikcqe->completion_status !=
			    ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
				bnx2i_iscsi_license_error(hba, ikcqe->\
							  completion_status);
			else {
				set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
				bnx2i_get_link_state(hba);
				printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
						 "ISCSI_INIT passed\n",
						 (u8)hba->pcidev->bus->number,
						 hba->pci_devno,
						 (u8)hba->pci_func);


			}
		} else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
			bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
			bnx2i_process_iscsi_error(hba, ikcqe);
		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
			bnx2i_process_tcp_error(hba, ikcqe);
		else
			printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
					  ikcqe->op_code);
	}
}


/**
 * bnx2i_indicate_netevent - Generic netdev event handler
 * @context:	adapter structure pointer
 * @event:	event type
 * @vlan_id:	vlans id - associated vlan id with this event
 *
 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
 *	NETDEV_GOING_DOWN and NETDEV_CHANGE
 */
static void bnx2i_indicate_netevent(void *context, unsigned long event,
				    u16 vlan_id)
{
	struct bnx2i_hba *hba = context;

	/* Ignore all netevent coming from vlans */
	if (vlan_id != 0)
		return;

	switch (event) {
	case NETDEV_UP:
		if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
			bnx2i_send_fw_iscsi_init_msg(hba);
		break;
	case NETDEV_DOWN:
		clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
		clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
		break;
	case NETDEV_GOING_DOWN:
		set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
		iscsi_host_for_each_session(hba->shost,
					    bnx2i_drop_session);
		break;
	case NETDEV_CHANGE:
		bnx2i_get_link_state(hba);
		break;
	default:
		;
	}
}


/**
 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
 * @cm_sk: 		cnic sock structure pointer
 *
 * function callback exported via bnx2i - cnic driver interface to
 *	indicate completion of option-2 TCP connect request.
 */
static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
{
	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;

	if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
		ep->state = EP_STATE_CONNECT_FAILED;
	else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
		ep->state = EP_STATE_CONNECT_COMPL;
	else
		ep->state = EP_STATE_CONNECT_FAILED;

	wake_up_interruptible(&ep->ofld_wait);
}


/**
 * bnx2i_cm_close_cmpl - process tcp conn close completion
 * @cm_sk:	cnic sock structure pointer
 *
 * function callback exported via bnx2i - cnic driver interface to
 *	indicate completion of option-2 graceful TCP connect shutdown
 */
static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
{
	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;

	ep->state = EP_STATE_DISCONN_COMPL;
	wake_up_interruptible(&ep->ofld_wait);
}


/**
 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
 * @cm_sk:	cnic sock structure pointer
 *
 * function callback exported via bnx2i - cnic driver interface to
 *	indicate completion of option-2 abortive TCP connect termination
 */
static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
{
	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;

	ep->state = EP_STATE_DISCONN_COMPL;
	wake_up_interruptible(&ep->ofld_wait);
}


/**
 * bnx2i_cm_remote_close - process received TCP FIN
 * @hba:		adapter structure pointer
 * @update_kcqe:	kcqe pointer
 *
 * function callback exported via bnx2i - cnic driver interface to indicate
 *	async TCP events such as FIN
 */
static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
{
	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;

	ep->state = EP_STATE_TCP_FIN_RCVD;
	if (ep->conn)
		bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
}

/**
 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
 * @hba:		adapter structure pointer
 * @update_kcqe:	kcqe pointer
 *
 * function callback exported via bnx2i - cnic driver interface to
 *	indicate async TCP events (RST) sent by the peer.
 */
static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
{
	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
	u32 old_state = ep->state;

	ep->state = EP_STATE_TCP_RST_RCVD;
	if (old_state == EP_STATE_DISCONN_START)
		wake_up_interruptible(&ep->ofld_wait);
	else
		if (ep->conn)
			bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
}


static int bnx2i_send_nl_mesg(void *context, u32 msg_type,
			      char *buf, u16 buflen)
{
	struct bnx2i_hba *hba = context;
	int rc;

	if (!hba)
		return -ENODEV;

	rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
				msg_type, buf, buflen);
	if (rc)
		printk(KERN_ALERT "bnx2i: private nl message send error\n");

	return rc;
}


/**
 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
 *			carrying callback function pointers
 *
 */
struct cnic_ulp_ops bnx2i_cnic_cb = {
	.cnic_init = bnx2i_ulp_init,
	.cnic_exit = bnx2i_ulp_exit,
	.cnic_start = bnx2i_start,
	.cnic_stop = bnx2i_stop,
	.indicate_kcqes = bnx2i_indicate_kcqe,
	.indicate_netevent = bnx2i_indicate_netevent,
	.cm_connect_complete = bnx2i_cm_connect_cmpl,
	.cm_close_complete = bnx2i_cm_close_cmpl,
	.cm_abort_complete = bnx2i_cm_abort_cmpl,
	.cm_remote_close = bnx2i_cm_remote_close,
	.cm_remote_abort = bnx2i_cm_remote_abort,
	.iscsi_nl_send_msg = bnx2i_send_nl_mesg,
	.owner = THIS_MODULE
};


/**
 * bnx2i_map_ep_dbell_regs - map connection doorbell registers
 * @ep: bnx2i endpoint
 *
 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
 *	register in BAR #0. Whereas in 57710 these register are accessed by
 *	mapping BAR #1
 */
int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
{
	u32 cid_num;
	u32 reg_off;
	u32 first_l4l5;
	u32 ctx_sz;
	u32 config2;
	resource_size_t reg_base;

	cid_num = bnx2i_get_cid_num(ep);

	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
		reg_base = pci_resource_start(ep->hba->pcidev,
					      BNX2X_DOORBELL_PCI_BAR);
		reg_off = BNX2I_5771X_DBELL_PAGE_SIZE * (cid_num & 0x1FFFF) +
			  DPM_TRIGER_TYPE;
		ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
		goto arm_cq;
	}

	reg_base = ep->hba->netdev->base_addr;
	if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
	    (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
		config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
		first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
		ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
		if (ctx_sz)
			reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
				  + BNX2I_570X_PAGE_SIZE_DEFAULT *
				  (((cid_num - first_l4l5) / ctx_sz) + 256);
		else
			reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
	} else
		/* 5709 device in normal node and 5706/5708 devices */
		reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);

	ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off,
					  MB_KERNEL_CTX_SIZE);
	if (!ep->qp.ctx_base)
		return -ENOMEM;

arm_cq:
	bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
	return 0;
}
OpenPOWER on IntegriCloud