summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/qla4xxx/ql4_init.c
blob: d692c713416a54b385e486c3c02b3f90876b5fcf (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
/*
 * QLogic iSCSI HBA Driver
 * Copyright (c)  2003-2006 QLogic Corporation
 *
 * See LICENSE.qla4xxx for copyright and licensing details.
 */

#include "ql4_def.h"
#include "ql4_glbl.h"
#include "ql4_dbg.h"
#include "ql4_inline.h"

static struct ddb_entry * qla4xxx_alloc_ddb(struct scsi_qla_host *ha,
					    uint32_t fw_ddb_index);

static void ql4xxx_set_mac_number(struct scsi_qla_host *ha)
{
	uint32_t value;
	uint8_t func_number;
	unsigned long flags;

	/* Get the function number */
	spin_lock_irqsave(&ha->hardware_lock, flags);
	value = readw(&ha->reg->ctrl_status);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	func_number = (uint8_t) ((value >> 4) & 0x30);
	switch (value & ISP_CONTROL_FN_MASK) {
	case ISP_CONTROL_FN0_SCSI:
		ha->mac_index = 1;
		break;
	case ISP_CONTROL_FN1_SCSI:
		ha->mac_index = 3;
		break;
	default:
		DEBUG2(printk("scsi%ld: %s: Invalid function number, "
			      "ispControlStatus = 0x%x\n", ha->host_no,
			      __func__, value));
		break;
	}
	DEBUG2(printk("scsi%ld: %s: mac_index %d.\n", ha->host_no, __func__,
		      ha->mac_index));
}

/**
 * qla4xxx_free_ddb - deallocate ddb
 * @ha: pointer to host adapter structure.
 * @ddb_entry: pointer to device database entry
 *
 * This routine deallocates and unlinks the specified ddb_entry from the
 * adapter's
 **/
static void qla4xxx_free_ddb(struct scsi_qla_host *ha,
			     struct ddb_entry *ddb_entry)
{
	/* Remove device entry from list */
	list_del_init(&ddb_entry->list);

	/* Remove device pointer from index mapping arrays */
	ha->fw_ddb_index_map[ddb_entry->fw_ddb_index] =
		(struct ddb_entry *) INVALID_ENTRY;
	ha->tot_ddbs--;

	/* Free memory and scsi-ml struct for device entry */
	qla4xxx_destroy_sess(ddb_entry);
}

/**
 * qla4xxx_free_ddb_list - deallocate all ddbs
 * @ha: pointer to host adapter structure.
 *
 * This routine deallocates and removes all devices on the sppecified adapter.
 **/
void qla4xxx_free_ddb_list(struct scsi_qla_host *ha)
{
	struct list_head *ptr;
	struct ddb_entry *ddb_entry;

	while (!list_empty(&ha->ddb_list)) {
		ptr = ha->ddb_list.next;
		/* Free memory for device entry and remove */
		ddb_entry = list_entry(ptr, struct ddb_entry, list);
		qla4xxx_free_ddb(ha, ddb_entry);
	}
}

/**
 * qla4xxx_init_rings - initialize hw queues
 * @ha: pointer to host adapter structure.
 *
 * This routine initializes the internal queues for the specified adapter.
 * The QLA4010 requires us to restart the queues at index 0.
 * The QLA4000 doesn't care, so just default to QLA4010's requirement.
 **/
int qla4xxx_init_rings(struct scsi_qla_host *ha)
{
	unsigned long flags = 0;

	/* Initialize request queue. */
	spin_lock_irqsave(&ha->hardware_lock, flags);
	ha->request_out = 0;
	ha->request_in = 0;
	ha->request_ptr = &ha->request_ring[ha->request_in];
	ha->req_q_count = REQUEST_QUEUE_DEPTH;

	/* Initialize response queue. */
	ha->response_in = 0;
	ha->response_out = 0;
	ha->response_ptr = &ha->response_ring[ha->response_out];

	/*
	 * Initialize DMA Shadow registers.  The firmware is really supposed to
	 * take care of this, but on some uniprocessor systems, the shadow
	 * registers aren't cleared-- causing the interrupt_handler to think
	 * there are responses to be processed when there aren't.
	 */
	ha->shadow_regs->req_q_out = __constant_cpu_to_le32(0);
	ha->shadow_regs->rsp_q_in = __constant_cpu_to_le32(0);
	wmb();

	writel(0, &ha->reg->req_q_in);
	writel(0, &ha->reg->rsp_q_out);
	readl(&ha->reg->rsp_q_out);

	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return QLA_SUCCESS;
}

/**
 * qla4xxx_validate_mac_address - validate adapter MAC address(es)
 * @ha: pointer to host adapter structure.
 *
 **/
static int qla4xxx_validate_mac_address(struct scsi_qla_host *ha)
{
	struct flash_sys_info *sys_info;
	dma_addr_t sys_info_dma;
	int status = QLA_ERROR;

	sys_info = dma_alloc_coherent(&ha->pdev->dev, sizeof(*sys_info),
				      &sys_info_dma, GFP_KERNEL);
	if (sys_info == NULL) {
		DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
			      ha->host_no, __func__));

		goto exit_validate_mac_no_free;
	}
	memset(sys_info, 0, sizeof(*sys_info));

	/* Get flash sys info */
	if (qla4xxx_get_flash(ha, sys_info_dma, FLASH_OFFSET_SYS_INFO,
			      sizeof(*sys_info)) != QLA_SUCCESS) {
		DEBUG2(printk("scsi%ld: %s: get_flash FLASH_OFFSET_SYS_INFO "
			      "failed\n", ha->host_no, __func__));

		goto exit_validate_mac;
	}

	/* Save M.A.C. address & serial_number */
	memcpy(ha->my_mac, &sys_info->physAddr[0].address[0],
	       min(sizeof(ha->my_mac),
		   sizeof(sys_info->physAddr[0].address)));
	memcpy(ha->serial_number, &sys_info->acSerialNumber,
	       min(sizeof(ha->serial_number),
		   sizeof(sys_info->acSerialNumber)));

	status = QLA_SUCCESS;

 exit_validate_mac:
	dma_free_coherent(&ha->pdev->dev, sizeof(*sys_info), sys_info,
			  sys_info_dma);

 exit_validate_mac_no_free:
	return status;
}

/**
 * qla4xxx_init_local_data - initialize adapter specific local data
 * @ha: pointer to host adapter structure.
 *
 **/
static int qla4xxx_init_local_data(struct scsi_qla_host *ha)
{
	/* Initilize aen queue */
	ha->aen_q_count = MAX_AEN_ENTRIES;

	return qla4xxx_get_firmware_status(ha);
}

static int qla4xxx_fw_ready(struct scsi_qla_host *ha)
{
	uint32_t timeout_count;
	int ready = 0;

	DEBUG2(dev_info(&ha->pdev->dev, "Waiting for Firmware Ready..\n"));
	for (timeout_count = ADAPTER_INIT_TOV; timeout_count > 0;
	     timeout_count--) {
		if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
			qla4xxx_get_dhcp_ip_address(ha);

		/* Get firmware state. */
		if (qla4xxx_get_firmware_state(ha) != QLA_SUCCESS) {
			DEBUG2(printk("scsi%ld: %s: unable to get firmware "
				      "state\n", ha->host_no, __func__));
			break;

		}

		if (ha->firmware_state & FW_STATE_ERROR) {
			DEBUG2(printk("scsi%ld: %s: an unrecoverable error has"
				      " occurred\n", ha->host_no, __func__));
			break;

		}
		if (ha->firmware_state & FW_STATE_CONFIG_WAIT) {
			/*
			 * The firmware has not yet been issued an Initialize
			 * Firmware command, so issue it now.
			 */
			if (qla4xxx_initialize_fw_cb(ha) == QLA_ERROR)
				break;

			/* Go back and test for ready state - no wait. */
			continue;
		}

		if (ha->firmware_state == FW_STATE_READY) {
			DEBUG2(dev_info(&ha->pdev->dev, "Firmware Ready..\n"));
			/* The firmware is ready to process SCSI commands. */
			DEBUG2(dev_info(&ha->pdev->dev,
					  "scsi%ld: %s: MEDIA TYPE - %s\n",
					  ha->host_no,
					  __func__, (ha->addl_fw_state &
						     FW_ADDSTATE_OPTICAL_MEDIA)
					  != 0 ? "OPTICAL" : "COPPER"));
			DEBUG2(dev_info(&ha->pdev->dev,
					  "scsi%ld: %s: DHCP STATE Enabled "
					  "%s\n",
					  ha->host_no, __func__,
					  (ha->addl_fw_state &
					   FW_ADDSTATE_DHCP_ENABLED) != 0 ?
					  "YES" : "NO"));
			DEBUG2(dev_info(&ha->pdev->dev,
					  "scsi%ld: %s: LINK %s\n",
					  ha->host_no, __func__,
					  (ha->addl_fw_state &
					   FW_ADDSTATE_LINK_UP) != 0 ?
					  "UP" : "DOWN"));
			DEBUG2(dev_info(&ha->pdev->dev,
					  "scsi%ld: %s: iSNS Service "
					  "Started %s\n",
					  ha->host_no, __func__,
					  (ha->addl_fw_state &
					   FW_ADDSTATE_ISNS_SVC_ENABLED) != 0 ?
					  "YES" : "NO"));

			ready = 1;
			break;
		}
		DEBUG2(printk("scsi%ld: %s: waiting on fw, state=%x:%x - "
			      "seconds expired= %d\n", ha->host_no, __func__,
			      ha->firmware_state, ha->addl_fw_state,
			      timeout_count));
		if (is_qla4032(ha) &&
			!(ha->addl_fw_state & FW_ADDSTATE_LINK_UP) &&
			(timeout_count < ADAPTER_INIT_TOV - 5)) {
			break;
		}

		msleep(1000);
	}			/* end of for */

	if (timeout_count == 0)
		DEBUG2(printk("scsi%ld: %s: FW Initialization timed out!\n",
			      ha->host_no, __func__));

	if (ha->firmware_state & FW_STATE_DHCP_IN_PROGRESS)  {
		DEBUG2(printk("scsi%ld: %s: FW is reporting its waiting to"
			      " grab an IP address from DHCP server\n",
			      ha->host_no, __func__));
		ready = 1;
	}

	return ready;
}

/**
 * qla4xxx_init_firmware - initializes the firmware.
 * @ha: pointer to host adapter structure.
 *
 **/
static int qla4xxx_init_firmware(struct scsi_qla_host *ha)
{
	int status = QLA_ERROR;

	dev_info(&ha->pdev->dev, "Initializing firmware..\n");
	if (qla4xxx_initialize_fw_cb(ha) == QLA_ERROR) {
		DEBUG2(printk("scsi%ld: %s: Failed to initialize firmware "
			      "control block\n", ha->host_no, __func__));
		return status;
	}
	if (!qla4xxx_fw_ready(ha))
		return status;

	return qla4xxx_get_firmware_status(ha);
}

static struct ddb_entry* qla4xxx_get_ddb_entry(struct scsi_qla_host *ha,
						uint32_t fw_ddb_index,
						uint32_t *new_tgt)
{
	struct dev_db_entry *fw_ddb_entry = NULL;
	dma_addr_t fw_ddb_entry_dma;
	struct ddb_entry *ddb_entry = NULL;
	int found = 0;
	uint32_t device_state;

	*new_tgt = 0;
	/* Make sure the dma buffer is valid */
	fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev,
					  sizeof(*fw_ddb_entry),
					  &fw_ddb_entry_dma, GFP_KERNEL);
	if (fw_ddb_entry == NULL) {
		DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
			      ha->host_no, __func__));
		return NULL;
	}

	if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index, fw_ddb_entry,
				    fw_ddb_entry_dma, NULL, NULL,
				    &device_state, NULL, NULL, NULL) ==
	    QLA_ERROR) {
		DEBUG2(printk("scsi%ld: %s: failed get_ddb_entry for "
			      "fw_ddb_index %d\n", ha->host_no, __func__,
			      fw_ddb_index));
		return NULL;
	}

	/* Allocate DDB if not already allocated. */
	DEBUG2(printk("scsi%ld: %s: Looking for ddb[%d]\n", ha->host_no,
		      __func__, fw_ddb_index));
	list_for_each_entry(ddb_entry, &ha->ddb_list, list) {
		if (memcmp(ddb_entry->iscsi_name, fw_ddb_entry->iscsi_name,
			   ISCSI_NAME_SIZE) == 0) {
			found++;
			break;
		}
	}

	if (!found) {
		DEBUG2(printk("scsi%ld: %s: ddb[%d] not found - allocating "
			      "new ddb\n", ha->host_no, __func__,
			      fw_ddb_index));
		*new_tgt = 1;
		ddb_entry = qla4xxx_alloc_ddb(ha, fw_ddb_index);
	}

	/* if not found allocate new ddb */
	dma_free_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry), fw_ddb_entry,
			  fw_ddb_entry_dma);

	return ddb_entry;
}

/**
 * qla4xxx_update_ddb_entry - update driver's internal ddb
 * @ha: pointer to host adapter structure.
 * @ddb_entry: pointer to device database structure to be filled
 * @fw_ddb_index: index of the ddb entry in fw ddb table
 *
 * This routine updates the driver's internal device database entry
 * with information retrieved from the firmware's device database
 * entry for the specified device. The ddb_entry->fw_ddb_index field
 * must be initialized prior to	calling this routine
 *
 **/
static int qla4xxx_update_ddb_entry(struct scsi_qla_host *ha,
				    struct ddb_entry *ddb_entry,
				    uint32_t fw_ddb_index)
{
	struct dev_db_entry *fw_ddb_entry = NULL;
	dma_addr_t fw_ddb_entry_dma;
	int status = QLA_ERROR;

	if (ddb_entry == NULL) {
		DEBUG2(printk("scsi%ld: %s: ddb_entry is NULL\n", ha->host_no,
			      __func__));
		goto exit_update_ddb;
	}

	/* Make sure the dma buffer is valid */
	fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev,
					  sizeof(*fw_ddb_entry),
					  &fw_ddb_entry_dma, GFP_KERNEL);
	if (fw_ddb_entry == NULL) {
		DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
			      ha->host_no, __func__));

		goto exit_update_ddb;
	}

	if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index, fw_ddb_entry,
				    fw_ddb_entry_dma, NULL, NULL,
				    &ddb_entry->fw_ddb_device_state, NULL,
				    &ddb_entry->tcp_source_port_num,
				    &ddb_entry->connection_id) ==
	    QLA_ERROR) {
		DEBUG2(printk("scsi%ld: %s: failed get_ddb_entry for "
			      "fw_ddb_index %d\n", ha->host_no, __func__,
			      fw_ddb_index));

		goto exit_update_ddb;
	}

	status = QLA_SUCCESS;
	ddb_entry->target_session_id = le16_to_cpu(fw_ddb_entry->tsid);
	ddb_entry->task_mgmt_timeout =
		le16_to_cpu(fw_ddb_entry->def_timeout);
	ddb_entry->CmdSn = 0;
	ddb_entry->exe_throttle = le16_to_cpu(fw_ddb_entry->exec_throttle);
	ddb_entry->default_relogin_timeout =
		le16_to_cpu(fw_ddb_entry->def_timeout);
	ddb_entry->default_time2wait = le16_to_cpu(fw_ddb_entry->iscsi_def_time2wait);

	/* Update index in case it changed */
	ddb_entry->fw_ddb_index = fw_ddb_index;
	ha->fw_ddb_index_map[fw_ddb_index] = ddb_entry;

	ddb_entry->port = le16_to_cpu(fw_ddb_entry->port);
	ddb_entry->tpgt = le32_to_cpu(fw_ddb_entry->tgt_portal_grp);
	memcpy(&ddb_entry->iscsi_name[0], &fw_ddb_entry->iscsi_name[0],
	       min(sizeof(ddb_entry->iscsi_name),
		   sizeof(fw_ddb_entry->iscsi_name)));
	memcpy(&ddb_entry->ip_addr[0], &fw_ddb_entry->ip_addr[0],
	       min(sizeof(ddb_entry->ip_addr), sizeof(fw_ddb_entry->ip_addr)));

	DEBUG2(printk("scsi%ld: %s: ddb[%d] - State= %x status= %d.\n",
		      ha->host_no, __func__, fw_ddb_index,
		      ddb_entry->fw_ddb_device_state, status));

 exit_update_ddb:
	if (fw_ddb_entry)
		dma_free_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
				  fw_ddb_entry, fw_ddb_entry_dma);

	return status;
}

/**
 * qla4xxx_alloc_ddb - allocate device database entry
 * @ha: Pointer to host adapter structure.
 * @fw_ddb_index: Firmware's device database index
 *
 * This routine allocates a ddb_entry, ititializes some values, and
 * inserts it into the ddb list.
 **/
static struct ddb_entry * qla4xxx_alloc_ddb(struct scsi_qla_host *ha,
					    uint32_t fw_ddb_index)
{
	struct ddb_entry *ddb_entry;

	DEBUG2(printk("scsi%ld: %s: fw_ddb_index [%d]\n", ha->host_no,
		      __func__, fw_ddb_index));

	ddb_entry = qla4xxx_alloc_sess(ha);
	if (ddb_entry == NULL) {
		DEBUG2(printk("scsi%ld: %s: Unable to allocate memory "
			      "to add fw_ddb_index [%d]\n",
			      ha->host_no, __func__, fw_ddb_index));
		return ddb_entry;
	}

	ddb_entry->fw_ddb_index = fw_ddb_index;
	atomic_set(&ddb_entry->port_down_timer, ha->port_down_retry_count);
	atomic_set(&ddb_entry->retry_relogin_timer, INVALID_ENTRY);
	atomic_set(&ddb_entry->relogin_timer, 0);
	atomic_set(&ddb_entry->relogin_retry_count, 0);
	atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
	list_add_tail(&ddb_entry->list, &ha->ddb_list);
	ha->fw_ddb_index_map[fw_ddb_index] = ddb_entry;
	ha->tot_ddbs++;

	return ddb_entry;
}

/**
 * qla4xxx_configure_ddbs - builds driver ddb list
 * @ha: Pointer to host adapter structure.
 *
 * This routine searches for all valid firmware ddb entries and builds
 * an internal ddb list. Ddbs that are considered valid are those with
 * a device state of SESSION_ACTIVE.
 **/
static int qla4xxx_build_ddb_list(struct scsi_qla_host *ha)
{
	int status = QLA_SUCCESS;
	uint32_t fw_ddb_index = 0;
	uint32_t next_fw_ddb_index = 0;
	uint32_t ddb_state;
	uint32_t conn_err, err_code;
	struct ddb_entry *ddb_entry;
	uint32_t new_tgt;

	dev_info(&ha->pdev->dev, "Initializing DDBs ...\n");
	for (fw_ddb_index = 0; fw_ddb_index < MAX_DDB_ENTRIES;
	     fw_ddb_index = next_fw_ddb_index) {
		/* First, let's see if a device exists here */
		if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index, NULL, 0, NULL,
					    &next_fw_ddb_index, &ddb_state,
					    &conn_err, NULL, NULL) ==
		    QLA_ERROR) {
			DEBUG2(printk("scsi%ld: %s: get_ddb_entry, "
				      "fw_ddb_index %d failed", ha->host_no,
				      __func__, fw_ddb_index));
			return QLA_ERROR;
		}

		DEBUG2(printk("scsi%ld: %s: Getting DDB[%d] ddbstate=0x%x, "
			      "next_fw_ddb_index=%d.\n", ha->host_no, __func__,
			      fw_ddb_index, ddb_state, next_fw_ddb_index));

		/* Issue relogin, if necessary. */
		if (ddb_state == DDB_DS_SESSION_FAILED ||
		    ddb_state == DDB_DS_NO_CONNECTION_ACTIVE) {
			/* Try and login to device */
			DEBUG2(printk("scsi%ld: %s: Login to DDB[%d]\n",
				      ha->host_no, __func__, fw_ddb_index));
			err_code = ((conn_err & 0x00ff0000) >> 16);
			if (err_code == 0x1c || err_code == 0x06) {
				DEBUG2(printk("scsi%ld: %s send target "
					      "completed "
					      "or access denied failure\n",
					      ha->host_no, __func__));
			} else {
				qla4xxx_set_ddb_entry(ha, fw_ddb_index, 0);
				if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index,
					NULL, 0, NULL, &next_fw_ddb_index,
					&ddb_state, &conn_err, NULL, NULL)
					== QLA_ERROR) {
					DEBUG2(printk("scsi%ld: %s:"
						"get_ddb_entry %d failed\n",
						ha->host_no,
						__func__, fw_ddb_index));
					return QLA_ERROR;
				}
			}
		}

		if (ddb_state != DDB_DS_SESSION_ACTIVE)
			goto next_one;
		/*
		 * if fw_ddb with session active state found,
		 * add to ddb_list
		 */
		DEBUG2(printk("scsi%ld: %s: DDB[%d] added to list\n",
			      ha->host_no, __func__, fw_ddb_index));

		/* Add DDB to internal our ddb list. */
		ddb_entry = qla4xxx_get_ddb_entry(ha, fw_ddb_index, &new_tgt);
		if (ddb_entry == NULL) {
			DEBUG2(printk("scsi%ld: %s: Unable to allocate memory "
				      "for device at fw_ddb_index %d\n",
				      ha->host_no, __func__, fw_ddb_index));
			return QLA_ERROR;
		}
		/* Fill in the device structure */
		if (qla4xxx_update_ddb_entry(ha, ddb_entry, fw_ddb_index) ==
		    QLA_ERROR) {
			ha->fw_ddb_index_map[fw_ddb_index] =
				(struct ddb_entry *)INVALID_ENTRY;


			DEBUG2(printk("scsi%ld: %s: update_ddb_entry failed "
				      "for fw_ddb_index %d.\n",
				      ha->host_no, __func__, fw_ddb_index));
			return QLA_ERROR;
		}

next_one:
		/* We know we've reached the last device when
		 * next_fw_ddb_index is 0 */
		if (next_fw_ddb_index == 0)
			break;
	}

	dev_info(&ha->pdev->dev, "DDB list done..\n");

	return status;
}

struct qla4_relog_scan {
	int halt_wait;
	uint32_t conn_err;
	uint32_t err_code;
	uint32_t fw_ddb_index;
	uint32_t next_fw_ddb_index;
	uint32_t fw_ddb_device_state;
};

static int qla4_test_rdy(struct scsi_qla_host *ha, struct qla4_relog_scan *rs)
{
	struct ddb_entry *ddb_entry;

	/*
	 * Don't want to do a relogin if connection
	 * error is 0x1c.
	 */
	rs->err_code = ((rs->conn_err & 0x00ff0000) >> 16);
	if (rs->err_code == 0x1c || rs->err_code == 0x06) {
		DEBUG2(printk(
			       "scsi%ld: %s send target"
			       " completed or "
			       "access denied failure\n",
			       ha->host_no, __func__));
	} else {
		/* We either have a device that is in
		 * the process of relogging in or a
		 * device that is waiting to be
		 * relogged in */
		rs->halt_wait = 0;

		ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha,
							   rs->fw_ddb_index);
		if (ddb_entry == NULL)
			return QLA_ERROR;

		if (ddb_entry->dev_scan_wait_to_start_relogin != 0
		    && time_after_eq(jiffies,
				     ddb_entry->
				     dev_scan_wait_to_start_relogin))
		{
			ddb_entry->dev_scan_wait_to_start_relogin = 0;
			qla4xxx_set_ddb_entry(ha, rs->fw_ddb_index, 0);
		}
	}
	return QLA_SUCCESS;
}

static int qla4_scan_for_relogin(struct scsi_qla_host *ha,
				 struct qla4_relog_scan *rs)
{
	int error;

	/* scan for relogins
	 * ----------------- */
	for (rs->fw_ddb_index = 0; rs->fw_ddb_index < MAX_DDB_ENTRIES;
	     rs->fw_ddb_index = rs->next_fw_ddb_index) {
		if (qla4xxx_get_fwddb_entry(ha, rs->fw_ddb_index, NULL, 0,
					    NULL, &rs->next_fw_ddb_index,
					    &rs->fw_ddb_device_state,
					    &rs->conn_err, NULL, NULL)
		    == QLA_ERROR)
			return QLA_ERROR;

		if (rs->fw_ddb_device_state == DDB_DS_LOGIN_IN_PROCESS)
			rs->halt_wait = 0;

		if (rs->fw_ddb_device_state == DDB_DS_SESSION_FAILED ||
		    rs->fw_ddb_device_state == DDB_DS_NO_CONNECTION_ACTIVE) {
			error = qla4_test_rdy(ha, rs);
			if (error)
				return error;
		}

		/* We know we've reached the last device when
		 * next_fw_ddb_index is 0 */
		if (rs->next_fw_ddb_index == 0)
			break;
	}
	return QLA_SUCCESS;
}

/**
 * qla4xxx_devices_ready - wait for target devices to be logged in
 * @ha: pointer to adapter structure
 *
 * This routine waits up to ql4xdiscoverywait seconds
 * F/W database during driver load time.
 **/
static int qla4xxx_devices_ready(struct scsi_qla_host *ha)
{
	int error;
	unsigned long discovery_wtime;
	struct qla4_relog_scan rs;

	discovery_wtime = jiffies + (ql4xdiscoverywait * HZ);

	DEBUG(printk("Waiting (%d) for devices ...\n", ql4xdiscoverywait));
	do {
		/* poll for AEN. */
		qla4xxx_get_firmware_state(ha);
		if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags)) {
			/* Set time-between-relogin timer */
			qla4xxx_process_aen(ha, RELOGIN_DDB_CHANGED_AENS);
		}

		/* if no relogins active or needed, halt discvery wait */
		rs.halt_wait = 1;

		error = qla4_scan_for_relogin(ha, &rs);

		if (rs.halt_wait) {
			DEBUG2(printk("scsi%ld: %s: Delay halted.  Devices "
				      "Ready.\n", ha->host_no, __func__));
			return QLA_SUCCESS;
		}

		msleep(2000);
	} while (!time_after_eq(jiffies, discovery_wtime));

	DEBUG3(qla4xxx_get_conn_event_log(ha));

	return QLA_SUCCESS;
}

static void qla4xxx_flush_AENS(struct scsi_qla_host *ha)
{
	unsigned long wtime;

	/* Flush the 0x8014 AEN from the firmware as a result of
	 * Auto connect. We are basically doing get_firmware_ddb()
	 * to determine whether we need to log back in or not.
	 *  Trying to do a set ddb before we have processed 0x8014
	 *  will result in another set_ddb() for the same ddb. In other
	 *  words there will be stale entries in the aen_q.
	 */
	wtime = jiffies + (2 * HZ);
	do {
		if (qla4xxx_get_firmware_state(ha) == QLA_SUCCESS)
			if (ha->firmware_state & (BIT_2 | BIT_0))
				return;

		if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
			qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);

		msleep(1000);
	} while (!time_after_eq(jiffies, wtime));

}

static int qla4xxx_initialize_ddb_list(struct scsi_qla_host *ha)
{
	uint16_t fw_ddb_index;
	int status = QLA_SUCCESS;

	/* free the ddb list if is not empty */
	if (!list_empty(&ha->ddb_list))
		qla4xxx_free_ddb_list(ha);

	for (fw_ddb_index = 0; fw_ddb_index < MAX_DDB_ENTRIES; fw_ddb_index++)
		ha->fw_ddb_index_map[fw_ddb_index] =
			(struct ddb_entry *)INVALID_ENTRY;

	ha->tot_ddbs = 0;

	qla4xxx_flush_AENS(ha);

	/*
	 * First perform device discovery for active
	 * fw ddb indexes and build
	 * ddb list.
	 */
	if ((status = qla4xxx_build_ddb_list(ha)) == QLA_ERROR)
		return status;

	/* Wait for an AEN */
	qla4xxx_devices_ready(ha);

	/*
	 * Targets can come online after the inital discovery, so processing
	 * the aens here will catch them.
	 */
	if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
		qla4xxx_process_aen(ha, PROCESS_ALL_AENS);

	return status;
}

/**
 * qla4xxx_update_ddb_list - update the driver ddb list
 * @ha: pointer to host adapter structure.
 *
 * This routine obtains device information from the F/W database after
 * firmware or adapter resets.  The device table is preserved.
 **/
int qla4xxx_reinitialize_ddb_list(struct scsi_qla_host *ha)
{
	int status = QLA_SUCCESS;
	struct ddb_entry *ddb_entry, *detemp;

	/* Update the device information for all devices. */
	list_for_each_entry_safe(ddb_entry, detemp, &ha->ddb_list, list) {
		qla4xxx_update_ddb_entry(ha, ddb_entry,
					 ddb_entry->fw_ddb_index);
		if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) {
			atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
			DEBUG2(printk ("scsi%ld: %s: ddb index [%d] marked "
				       "ONLINE\n", ha->host_no, __func__,
				       ddb_entry->fw_ddb_index));
		} else if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
			qla4xxx_mark_device_missing(ha, ddb_entry);
	}
	return status;
}

/**
 * qla4xxx_relogin_device - re-establish session
 * @ha: Pointer to host adapter structure.
 * @ddb_entry: Pointer to device database entry
 *
 * This routine does a session relogin with the specified device.
 * The ddb entry must be assigned prior to making this call.
 **/
int qla4xxx_relogin_device(struct scsi_qla_host *ha,
			   struct ddb_entry * ddb_entry)
{
	uint16_t relogin_timer;

	relogin_timer = max(ddb_entry->default_relogin_timeout,
			    (uint16_t)RELOGIN_TOV);
	atomic_set(&ddb_entry->relogin_timer, relogin_timer);

	DEBUG2(printk("scsi%ld: Relogin index [%d]. TOV=%d\n", ha->host_no,
		      ddb_entry->fw_ddb_index, relogin_timer));

	qla4xxx_set_ddb_entry(ha, ddb_entry->fw_ddb_index, 0);

	return QLA_SUCCESS;
}

static int qla4xxx_config_nvram(struct scsi_qla_host *ha)
{
	unsigned long flags;
	union external_hw_config_reg extHwConfig;

	DEBUG2(printk("scsi%ld: %s: Get EEProm parameters \n", ha->host_no,
		      __func__));
	if (ql4xxx_lock_flash(ha) != QLA_SUCCESS)
		return (QLA_ERROR);
	if (ql4xxx_lock_nvram(ha) != QLA_SUCCESS) {
		ql4xxx_unlock_flash(ha);
		return (QLA_ERROR);
	}

	/* Get EEPRom Parameters from NVRAM and validate */
	dev_info(&ha->pdev->dev, "Configuring NVRAM ...\n");
	if (qla4xxx_is_nvram_configuration_valid(ha) == QLA_SUCCESS) {
		spin_lock_irqsave(&ha->hardware_lock, flags);
		extHwConfig.Asuint32_t =
			rd_nvram_word(ha, eeprom_ext_hw_conf_offset(ha));
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
	} else {
		/*
		 * QLogic adapters should always have a valid NVRAM.
		 * If not valid, do not load.
		 */
		dev_warn(&ha->pdev->dev,
			   "scsi%ld: %s: EEProm checksum invalid.  "
			   "Please update your EEPROM\n", ha->host_no,
			   __func__);

		/* set defaults */
		if (is_qla4010(ha))
			extHwConfig.Asuint32_t = 0x1912;
		else if (is_qla4022(ha) | is_qla4032(ha))
			extHwConfig.Asuint32_t = 0x0023;
	}
	DEBUG(printk("scsi%ld: %s: Setting extHwConfig to 0xFFFF%04x\n",
		     ha->host_no, __func__, extHwConfig.Asuint32_t));

	spin_lock_irqsave(&ha->hardware_lock, flags);
	writel((0xFFFF << 16) | extHwConfig.Asuint32_t, isp_ext_hw_conf(ha));
	readl(isp_ext_hw_conf(ha));
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	ql4xxx_unlock_nvram(ha);
	ql4xxx_unlock_flash(ha);

	return (QLA_SUCCESS);
}

static void qla4x00_pci_config(struct scsi_qla_host *ha)
{
	uint16_t w;
	int status;

	dev_info(&ha->pdev->dev, "Configuring PCI space...\n");

	pci_set_master(ha->pdev);
	status = pci_set_mwi(ha->pdev);
	/*
	 * We want to respect framework's setting of PCI configuration space
	 * command register and also want to make sure that all bits of
	 * interest to us are properly set in command register.
	 */
	pci_read_config_word(ha->pdev, PCI_COMMAND, &w);
	w |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
	w &= ~PCI_COMMAND_INTX_DISABLE;
	pci_write_config_word(ha->pdev, PCI_COMMAND, w);
}

static int qla4xxx_start_firmware_from_flash(struct scsi_qla_host *ha)
{
	int status = QLA_ERROR;
	uint32_t max_wait_time;
	unsigned long flags;
	uint32_t mbox_status;

	dev_info(&ha->pdev->dev, "Starting firmware ...\n");

	/*
	 * Start firmware from flash ROM
	 *
	 * WORKAROUND: Stuff a non-constant value that the firmware can
	 * use as a seed for a random number generator in MB7 prior to
	 * setting BOOT_ENABLE.	 Fixes problem where the TCP
	 * connections use the same TCP ports after each reboot,
	 * causing some connections to not get re-established.
	 */
	DEBUG(printk("scsi%d: %s: Start firmware from flash ROM\n",
		     ha->host_no, __func__));

	spin_lock_irqsave(&ha->hardware_lock, flags);
	writel(jiffies, &ha->reg->mailbox[7]);
	if (is_qla4022(ha) | is_qla4032(ha))
		writel(set_rmask(NVR_WRITE_ENABLE),
		       &ha->reg->u1.isp4022.nvram);

        writel(2, &ha->reg->mailbox[6]);
        readl(&ha->reg->mailbox[6]);

	writel(set_rmask(CSR_BOOT_ENABLE), &ha->reg->ctrl_status);
	readl(&ha->reg->ctrl_status);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	/* Wait for firmware to come UP. */
	max_wait_time = FIRMWARE_UP_TOV * 4;
	do {
		uint32_t ctrl_status;

		spin_lock_irqsave(&ha->hardware_lock, flags);
		ctrl_status = readw(&ha->reg->ctrl_status);
		mbox_status = readw(&ha->reg->mailbox[0]);
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

		if (ctrl_status & set_rmask(CSR_SCSI_PROCESSOR_INTR))
			break;
		if (mbox_status == MBOX_STS_COMMAND_COMPLETE)
			break;

		DEBUG2(printk("scsi%ld: %s: Waiting for boot firmware to "
			      "complete... ctrl_sts=0x%x, remaining=%d\n",
			      ha->host_no, __func__, ctrl_status,
			      max_wait_time));

		msleep(250);
	} while ((max_wait_time--));

	if (mbox_status == MBOX_STS_COMMAND_COMPLETE) {
		DEBUG(printk("scsi%ld: %s: Firmware has started\n",
			     ha->host_no, __func__));

		spin_lock_irqsave(&ha->hardware_lock, flags);
		writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
		       &ha->reg->ctrl_status);
		readl(&ha->reg->ctrl_status);
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

		status = QLA_SUCCESS;
	} else {
		printk(KERN_INFO "scsi%ld: %s: Boot firmware failed "
		       "-  mbox status 0x%x\n", ha->host_no, __func__,
		       mbox_status);
		status = QLA_ERROR;
	}
	return status;
}

int ql4xxx_lock_drvr_wait(struct scsi_qla_host *a)
{
#define QL4_LOCK_DRVR_WAIT	60
#define QL4_LOCK_DRVR_SLEEP	1

	int drvr_wait = QL4_LOCK_DRVR_WAIT;
	while (drvr_wait) {
		if (ql4xxx_lock_drvr(a) == 0) {
			ssleep(QL4_LOCK_DRVR_SLEEP);
			if (drvr_wait) {
				DEBUG2(printk("scsi%ld: %s: Waiting for "
					      "Global Init Semaphore(%d)...\n",
					      a->host_no,
					      __func__, drvr_wait));
			}
			drvr_wait -= QL4_LOCK_DRVR_SLEEP;
		} else {
			DEBUG2(printk("scsi%ld: %s: Global Init Semaphore "
				      "acquired\n", a->host_no, __func__));
			return QLA_SUCCESS;
		}
	}
	return QLA_ERROR;
}

/**
 * qla4xxx_start_firmware - starts qla4xxx firmware
 * @ha: Pointer to host adapter structure.
 *
 * This routine performs the necessary steps to start the firmware for
 * the QLA4010 adapter.
 **/
static int qla4xxx_start_firmware(struct scsi_qla_host *ha)
{
	unsigned long flags = 0;
	uint32_t mbox_status;
	int status = QLA_ERROR;
	int soft_reset = 1;
	int config_chip = 0;

	if (is_qla4022(ha) | is_qla4032(ha))
		ql4xxx_set_mac_number(ha);

	if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
		return QLA_ERROR;

	spin_lock_irqsave(&ha->hardware_lock, flags);

	DEBUG2(printk("scsi%ld: %s: port_ctrl	= 0x%08X\n", ha->host_no,
		      __func__, readw(isp_port_ctrl(ha))));
	DEBUG(printk("scsi%ld: %s: port_status = 0x%08X\n", ha->host_no,
		     __func__, readw(isp_port_status(ha))));

	/* Is Hardware already initialized? */
	if ((readw(isp_port_ctrl(ha)) & 0x8000) != 0) {
		DEBUG(printk("scsi%ld: %s: Hardware has already been "
			     "initialized\n", ha->host_no, __func__));

		/* Receive firmware boot acknowledgement */
		mbox_status = readw(&ha->reg->mailbox[0]);

		DEBUG2(printk("scsi%ld: %s: H/W Config complete - mbox[0]= "
			      "0x%x\n", ha->host_no, __func__, mbox_status));

		/* Is firmware already booted? */
		if (mbox_status == 0) {
			/* F/W not running, must be config by net driver */
			config_chip = 1;
			soft_reset = 0;
		} else {
			writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
			       &ha->reg->ctrl_status);
			readl(&ha->reg->ctrl_status);
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
			if (qla4xxx_get_firmware_state(ha) == QLA_SUCCESS) {
				DEBUG2(printk("scsi%ld: %s: Get firmware "
					      "state -- state = 0x%x\n",
					      ha->host_no,
					      __func__, ha->firmware_state));
				/* F/W is running */
				if (ha->firmware_state &
				    FW_STATE_CONFIG_WAIT) {
					DEBUG2(printk("scsi%ld: %s: Firmware "
						      "in known state -- "
						      "config and "
						      "boot, state = 0x%x\n",
						      ha->host_no, __func__,
						      ha->firmware_state));
					config_chip = 1;
					soft_reset = 0;
				}
			} else {
				DEBUG2(printk("scsi%ld: %s: Firmware in "
					      "unknown state -- resetting,"
					      " state = "
					      "0x%x\n", ha->host_no, __func__,
					      ha->firmware_state));
			}
			spin_lock_irqsave(&ha->hardware_lock, flags);
		}
	} else {
		DEBUG(printk("scsi%ld: %s: H/W initialization hasn't been "
			     "started - resetting\n", ha->host_no, __func__));
	}
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	DEBUG(printk("scsi%ld: %s: Flags soft_rest=%d, config= %d\n ",
		     ha->host_no, __func__, soft_reset, config_chip));
	if (soft_reset) {
		DEBUG(printk("scsi%ld: %s: Issue Soft Reset\n", ha->host_no,
			     __func__));
		status = qla4xxx_soft_reset(ha);
		if (status == QLA_ERROR) {
			DEBUG(printk("scsi%d: %s: Soft Reset failed!\n",
				     ha->host_no, __func__));
			ql4xxx_unlock_drvr(ha);
			return QLA_ERROR;
		}
		config_chip = 1;

		/* Reset clears the semaphore, so aquire again */
		if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
			return QLA_ERROR;
	}

	if (config_chip) {
		if ((status = qla4xxx_config_nvram(ha)) == QLA_SUCCESS)
			status = qla4xxx_start_firmware_from_flash(ha);
	}

	ql4xxx_unlock_drvr(ha);
	if (status == QLA_SUCCESS) {
		qla4xxx_get_fw_version(ha);
		if (test_and_clear_bit(AF_GET_CRASH_RECORD, &ha->flags))
			qla4xxx_get_crash_record(ha);
	} else {
		DEBUG(printk("scsi%ld: %s: Firmware has NOT started\n",
			     ha->host_no, __func__));
	}
	return status;
}


/**
 * qla4xxx_initialize_adapter - initiailizes hba
 * @ha: Pointer to host adapter structure.
 * @renew_ddb_list: Indicates what to do with the adapter's ddb list
 *	after adapter recovery has completed.
 *	0=preserve ddb list, 1=destroy and rebuild ddb list
 *
 * This routine parforms all of the steps necessary to initialize the adapter.
 *
 **/
int qla4xxx_initialize_adapter(struct scsi_qla_host *ha,
			       uint8_t renew_ddb_list)
{
	int status = QLA_ERROR;
	int8_t ip_address[IP_ADDR_LEN] = {0} ;

	ha->eeprom_cmd_data = 0;

	qla4x00_pci_config(ha);

	qla4xxx_disable_intrs(ha);

	/* Initialize the Host adapter request/response queues and firmware */
	if (qla4xxx_start_firmware(ha) == QLA_ERROR)
		goto exit_init_hba;

	if (qla4xxx_validate_mac_address(ha) == QLA_ERROR)
		goto exit_init_hba;

	if (qla4xxx_init_local_data(ha) == QLA_ERROR)
		goto exit_init_hba;

	status = qla4xxx_init_firmware(ha);
	if (status == QLA_ERROR)
		goto exit_init_hba;

	/*
	 * FW is waiting to get an IP address from DHCP server: Skip building
	 * the ddb_list and wait for DHCP lease acquired aen to come in
	 * followed by 0x8014 aen" to trigger the tgt discovery process.
	 */
	if (ha->firmware_state & FW_STATE_DHCP_IN_PROGRESS)
		goto exit_init_online;

	/* Skip device discovery if ip and subnet is zero */
	if (memcmp(ha->ip_address, ip_address, IP_ADDR_LEN) == 0 ||
	    memcmp(ha->subnet_mask, ip_address, IP_ADDR_LEN) == 0)
		goto exit_init_online;

	if (renew_ddb_list == PRESERVE_DDB_LIST) {
		/*
		 * We want to preserve lun states (i.e. suspended, etc.)
		 * for recovery initiated by the driver.  So just update
		 * the device states for the existing ddb_list.
		 */
		qla4xxx_reinitialize_ddb_list(ha);
	} else if (renew_ddb_list == REBUILD_DDB_LIST) {
		/*
		 * We want to build the ddb_list from scratch during
		 * driver initialization and recovery initiated by the
		 * INT_HBA_RESET IOCTL.
		 */
		status = qla4xxx_initialize_ddb_list(ha);
		if (status == QLA_ERROR) {
			DEBUG2(printk("%s(%ld) Error occurred during build"
				      "ddb list\n", __func__, ha->host_no));
			goto exit_init_hba;
		}

	}
	if (!ha->tot_ddbs) {
		DEBUG2(printk("scsi%ld: Failed to initialize devices or none "
			      "present in Firmware device database\n",
			      ha->host_no));
	}

exit_init_online:
	set_bit(AF_ONLINE, &ha->flags);
exit_init_hba:
	return status;
}

/**
 * qla4xxx_add_device_dynamically - ddb addition due to an AEN
 * @ha:  Pointer to host adapter structure.
 * @fw_ddb_index:  Firmware's device database index
 *
 * This routine processes adds a device as a result of an 8014h AEN.
 **/
static void qla4xxx_add_device_dynamically(struct scsi_qla_host *ha,
					   uint32_t fw_ddb_index)
{
	struct ddb_entry * ddb_entry;
	uint32_t new_tgt;

	/* First allocate a device structure */
	ddb_entry = qla4xxx_get_ddb_entry(ha, fw_ddb_index, &new_tgt);
	if (ddb_entry == NULL) {
		DEBUG2(printk(KERN_WARNING
			      "scsi%ld: Unable to allocate memory to add "
			      "fw_ddb_index %d\n", ha->host_no, fw_ddb_index));
		return;
	}

	if (!new_tgt && (ddb_entry->fw_ddb_index != fw_ddb_index)) {
		/* Target has been bound to a new fw_ddb_index */
		qla4xxx_free_ddb(ha, ddb_entry);
		ddb_entry = qla4xxx_alloc_ddb(ha, fw_ddb_index);
		if (ddb_entry == NULL) {
			DEBUG2(printk(KERN_WARNING
				"scsi%ld: Unable to allocate memory"
				" to add fw_ddb_index %d\n",
				ha->host_no, fw_ddb_index));
			return;
		}
	}
	if (qla4xxx_update_ddb_entry(ha, ddb_entry, fw_ddb_index) ==
				    QLA_ERROR) {
		ha->fw_ddb_index_map[fw_ddb_index] =
					(struct ddb_entry *)INVALID_ENTRY;
		DEBUG2(printk(KERN_WARNING
			      "scsi%ld: failed to add new device at index "
			      "[%d]\n Unable to retrieve fw ddb entry\n",
			      ha->host_no, fw_ddb_index));
		qla4xxx_free_ddb(ha, ddb_entry);
		return;
	}

	if (qla4xxx_add_sess(ddb_entry)) {
		DEBUG2(printk(KERN_WARNING
			      "scsi%ld: failed to add new device at index "
			      "[%d]\n Unable to add connection and session\n",
			      ha->host_no, fw_ddb_index));
		qla4xxx_free_ddb(ha, ddb_entry);
	}
}

/**
 * qla4xxx_process_ddb_changed - process ddb state change
 * @ha - Pointer to host adapter structure.
 * @fw_ddb_index - Firmware's device database index
 * @state - Device state
 *
 * This routine processes a Decive Database Changed AEN Event.
 **/
int qla4xxx_process_ddb_changed(struct scsi_qla_host *ha,
				uint32_t fw_ddb_index, uint32_t state)
{
	struct ddb_entry * ddb_entry;
	uint32_t old_fw_ddb_device_state;

	/* check for out of range index */
	if (fw_ddb_index >= MAX_DDB_ENTRIES)
		return QLA_ERROR;

	/* Get the corresponging ddb entry */
	ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha, fw_ddb_index);
	/* Device does not currently exist in our database. */
	if (ddb_entry == NULL) {
		if (state == DDB_DS_SESSION_ACTIVE)
			qla4xxx_add_device_dynamically(ha, fw_ddb_index);
		return QLA_SUCCESS;
	}

	/* Device already exists in our database. */
	old_fw_ddb_device_state = ddb_entry->fw_ddb_device_state;
	DEBUG2(printk("scsi%ld: %s DDB - old state= 0x%x, new state=0x%x for "
		      "index [%d]\n", ha->host_no, __func__,
		      ddb_entry->fw_ddb_device_state, state, fw_ddb_index));
	if (old_fw_ddb_device_state == state &&
	    state == DDB_DS_SESSION_ACTIVE) {
		/* Do nothing, state not changed. */
		return QLA_SUCCESS;
	}

	ddb_entry->fw_ddb_device_state = state;
	/* Device is back online. */
	if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) {
		atomic_set(&ddb_entry->port_down_timer,
			   ha->port_down_retry_count);
		atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
		atomic_set(&ddb_entry->relogin_retry_count, 0);
		atomic_set(&ddb_entry->relogin_timer, 0);
		clear_bit(DF_RELOGIN, &ddb_entry->flags);
		clear_bit(DF_NO_RELOGIN, &ddb_entry->flags);
		iscsi_if_create_session_done(ddb_entry->conn);
		/*
		 * Change the lun state to READY in case the lun TIMEOUT before
		 * the device came back.
		 */
	} else {
		/* Device went away, try to relogin. */
		/* Mark device missing */
		if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
			qla4xxx_mark_device_missing(ha, ddb_entry);
		/*
		 * Relogin if device state changed to a not active state.
		 * However, do not relogin if this aen is a result of an IOCTL
		 * logout (DF_NO_RELOGIN) or if this is a discovered device.
		 */
		if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_FAILED &&
		    !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
		    !test_bit(DF_NO_RELOGIN, &ddb_entry->flags) &&
		    !test_bit(DF_ISNS_DISCOVERED, &ddb_entry->flags)) {
			/*
			 * This triggers a relogin.  After the relogin_timer
			 * expires, the relogin gets scheduled.	 We must wait a
			 * minimum amount of time since receiving an 0x8014 AEN
			 * with failed device_state or a logout response before
			 * we can issue another relogin.
			 */
			/* Firmware padds this timeout: (time2wait +1).
			 * Driver retry to login should be longer than F/W.
			 * Otherwise F/W will fail
			 * set_ddb() mbx cmd with 0x4005 since it still
			 * counting down its time2wait.
			 */
			atomic_set(&ddb_entry->relogin_timer, 0);
			atomic_set(&ddb_entry->retry_relogin_timer,
				   ddb_entry->default_time2wait + 4);
		}
	}

	return QLA_SUCCESS;
}