aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/scsi/lpfc/lpfc_debugfs.c
blob: a80d938fafc90ae1530f9c2b8573a4ed39e61242 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2007-2009 Emulex.  All rights reserved.           *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.emulex.com                                                  *
 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
 * modify it under the terms of version 2 of the GNU General       *
 * Public License as published by the Free Software Foundation.    *
 * This program is distributed in the hope that it will be useful. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
 *******************************************************************/

#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/idr.h>
#include <linux/interrupt.h>
#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/ctype.h>

#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_fc.h>

#include "lpfc_hw4.h"
#include "lpfc_hw.h"
#include "lpfc_sli.h"
#include "lpfc_sli4.h"
#include "lpfc_nl.h"
#include "lpfc_disc.h"
#include "lpfc_scsi.h"
#include "lpfc.h"
#include "lpfc_logmsg.h"
#include "lpfc_crtn.h"
#include "lpfc_vport.h"
#include "lpfc_version.h"
#include "lpfc_compat.h"
#include "lpfc_debugfs.h"

#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
/*
 * debugfs interface
 *
 * To access this interface the user should:
 * # mount -t debugfs none /sys/kernel/debug
 *
 * The lpfc debugfs directory hierarchy is:
 * lpfc/lpfcX/vportY
 * where X is the lpfc hba unique_id
 * where Y is the vport VPI on that hba
 *
 * Debugging services available per vport:
 * discovery_trace
 * This is an ACSII readable file that contains a trace of the last
 * lpfc_debugfs_max_disc_trc events that happened on a specific vport.
 * See lpfc_debugfs.h for different categories of  discovery events.
 * To enable the discovery trace, the following module parameters must be set:
 * lpfc_debugfs_enable=1         Turns on lpfc debugfs filesystem support
 * lpfc_debugfs_max_disc_trc=X   Where X is the event trace depth for
 *                               EACH vport. X MUST also be a power of 2.
 * lpfc_debugfs_mask_disc_trc=Y  Where Y is an event mask as defined in
 *                               lpfc_debugfs.h .
 *
 * slow_ring_trace
 * This is an ACSII readable file that contains a trace of the last
 * lpfc_debugfs_max_slow_ring_trc events that happened on a specific HBA.
 * To enable the slow ring trace, the following module parameters must be set:
 * lpfc_debugfs_enable=1         Turns on lpfc debugfs filesystem support
 * lpfc_debugfs_max_slow_ring_trc=X   Where X is the event trace depth for
 *                               the HBA. X MUST also be a power of 2.
 */
static int lpfc_debugfs_enable = 1;
module_param(lpfc_debugfs_enable, int, 0);
MODULE_PARM_DESC(lpfc_debugfs_enable, "Enable debugfs services");

/* This MUST be a power of 2 */
static int lpfc_debugfs_max_disc_trc;
module_param(lpfc_debugfs_max_disc_trc, int, 0);
MODULE_PARM_DESC(lpfc_debugfs_max_disc_trc,
	"Set debugfs discovery trace depth");

/* This MUST be a power of 2 */
static int lpfc_debugfs_max_slow_ring_trc;
module_param(lpfc_debugfs_max_slow_ring_trc, int, 0);
MODULE_PARM_DESC(lpfc_debugfs_max_slow_ring_trc,
	"Set debugfs slow ring trace depth");

static int lpfc_debugfs_mask_disc_trc;
module_param(lpfc_debugfs_mask_disc_trc, int, 0);
MODULE_PARM_DESC(lpfc_debugfs_mask_disc_trc,
	"Set debugfs discovery trace mask");

#include <linux/debugfs.h>

/* size of output line, for discovery_trace and slow_ring_trace */
#define LPFC_DEBUG_TRC_ENTRY_SIZE 100

/* nodelist output buffer size */
#define LPFC_NODELIST_SIZE 8192
#define LPFC_NODELIST_ENTRY_SIZE 120

/* dumpHBASlim output buffer size */
#define LPFC_DUMPHBASLIM_SIZE 4096

/* dumpHostSlim output buffer size */
#define LPFC_DUMPHOSTSLIM_SIZE 4096

/* hbqinfo output buffer size */
#define LPFC_HBQINFO_SIZE 8192

struct lpfc_debug {
	char *buffer;
	int  len;
};

static atomic_t lpfc_debugfs_seq_trc_cnt = ATOMIC_INIT(0);
static unsigned long lpfc_debugfs_start_time = 0L;

/**
 * lpfc_debugfs_disc_trc_data - Dump discovery logging to a buffer
 * @vport: The vport to gather the log info from.
 * @buf: The buffer to dump log into.
 * @size: The maximum amount of data to process.
 *
 * Description:
 * This routine gathers the lpfc discovery debugfs data from the @vport and
 * dumps it to @buf up to @size number of bytes. It will start at the next entry
 * in the log and process the log until the end of the buffer. Then it will
 * gather from the beginning of the log and process until the current entry.
 *
 * Notes:
 * Discovery logging will be disabled while while this routine dumps the log.
 *
 * Return Value:
 * This routine returns the amount of bytes that were dumped into @buf and will
 * not exceed @size.
 **/
static int
lpfc_debugfs_disc_trc_data(struct lpfc_vport *vport, char *buf, int size)
{
	int i, index, len, enable;
	uint32_t ms;
	struct lpfc_debugfs_trc *dtp;
	char buffer[LPFC_DEBUG_TRC_ENTRY_SIZE];

	enable = lpfc_debugfs_enable;
	lpfc_debugfs_enable = 0;

	len = 0;
	index = (atomic_read(&vport->disc_trc_cnt) + 1) &
		(lpfc_debugfs_max_disc_trc - 1);
	for (i = index; i < lpfc_debugfs_max_disc_trc; i++) {
		dtp = vport->disc_trc + i;
		if (!dtp->fmt)
			continue;
		ms = jiffies_to_msecs(dtp->jif - lpfc_debugfs_start_time);
		snprintf(buffer,
			LPFC_DEBUG_TRC_ENTRY_SIZE, "%010d:%010d ms:%s\n",
			dtp->seq_cnt, ms, dtp->fmt);
		len +=  snprintf(buf+len, size-len, buffer,
			dtp->data1, dtp->data2, dtp->data3);
	}
	for (i = 0; i < index; i++) {
		dtp = vport->disc_trc + i;
		if (!dtp->fmt)
			continue;
		ms = jiffies_to_msecs(dtp->jif - lpfc_debugfs_start_time);
		snprintf(buffer,
			LPFC_DEBUG_TRC_ENTRY_SIZE, "%010d:%010d ms:%s\n",
			dtp->seq_cnt, ms, dtp->fmt);
		len +=  snprintf(buf+len, size-len, buffer,
			dtp->data1, dtp->data2, dtp->data3);
	}

	lpfc_debugfs_enable = enable;
	return len;
}

/**
 * lpfc_debugfs_slow_ring_trc_data - Dump slow ring logging to a buffer
 * @phba: The HBA to gather the log info from.
 * @buf: The buffer to dump log into.
 * @size: The maximum amount of data to process.
 *
 * Description:
 * This routine gathers the lpfc slow ring debugfs data from the @phba and
 * dumps it to @buf up to @size number of bytes. It will start at the next entry
 * in the log and process the log until the end of the buffer. Then it will
 * gather from the beginning of the log and process until the current entry.
 *
 * Notes:
 * Slow ring logging will be disabled while while this routine dumps the log.
 *
 * Return Value:
 * This routine returns the amount of bytes that were dumped into @buf and will
 * not exceed @size.
 **/
static int
lpfc_debugfs_slow_ring_trc_data(struct lpfc_hba *phba, char *buf, int size)
{
	int i, index, len, enable;
	uint32_t ms;
	struct lpfc_debugfs_trc *dtp;
	char buffer[LPFC_DEBUG_TRC_ENTRY_SIZE];


	enable = lpfc_debugfs_enable;
	lpfc_debugfs_enable = 0;

	len = 0;
	index = (atomic_read(&phba->slow_ring_trc_cnt) + 1) &
		(lpfc_debugfs_max_slow_ring_trc - 1);
	for (i = index; i < lpfc_debugfs_max_slow_ring_trc; i++) {
		dtp = phba->slow_ring_trc + i;
		if (!dtp->fmt)
			continue;
		ms = jiffies_to_msecs(dtp->jif - lpfc_debugfs_start_time);
		snprintf(buffer,
			LPFC_DEBUG_TRC_ENTRY_SIZE, "%010d:%010d ms:%s\n",
			dtp->seq_cnt, ms, dtp->fmt);
		len +=  snprintf(buf+len, size-len, buffer,
			dtp->data1, dtp->data2, dtp->data3);
	}
	for (i = 0; i < index; i++) {
		dtp = phba->slow_ring_trc + i;
		if (!dtp->fmt)
			continue;
		ms = jiffies_to_msecs(dtp->jif - lpfc_debugfs_start_time);
		snprintf(buffer,
			LPFC_DEBUG_TRC_ENTRY_SIZE, "%010d:%010d ms:%s\n",
			dtp->seq_cnt, ms, dtp->fmt);
		len +=  snprintf(buf+len, size-len, buffer,
			dtp->data1, dtp->data2, dtp->data3);
	}

	lpfc_debugfs_enable = enable;
	return len;
}

static int lpfc_debugfs_last_hbq = -1;

/**
 * lpfc_debugfs_hbqinfo_data - Dump host buffer queue info to a buffer
 * @phba: The HBA to gather host buffer info from.
 * @buf: The buffer to dump log into.
 * @size: The maximum amount of data to process.
 *
 * Description:
 * This routine dumps the host buffer queue info from the @phba to @buf up to
 * @size number of bytes. A header that describes the current hbq state will be
 * dumped to @buf first and then info on each hbq entry will be dumped to @buf
 * until @size bytes have been dumped or all the hbq info has been dumped.
 *
 * Notes:
 * This routine will rotate through each configured HBQ each time called.
 *
 * Return Value:
 * This routine returns the amount of bytes that were dumped into @buf and will
 * not exceed @size.
 **/
static int
lpfc_debugfs_hbqinfo_data(struct lpfc_hba *phba, char *buf, int size)
{
	int len = 0;
	int cnt, i, j, found, posted, low;
	uint32_t phys, raw_index, getidx;
	struct lpfc_hbq_init *hip;
	struct hbq_s *hbqs;
	struct lpfc_hbq_entry *hbqe;
	struct lpfc_dmabuf *d_buf;
	struct hbq_dmabuf *hbq_buf;

	if (phba->sli_rev != 3)
		return 0;
	cnt = LPFC_HBQINFO_SIZE;
	spin_lock_irq(&phba->hbalock);

	/* toggle between multiple hbqs, if any */
	i = lpfc_sli_hbq_count();
	if (i > 1) {
		 lpfc_debugfs_last_hbq++;
		 if (lpfc_debugfs_last_hbq >= i)
			lpfc_debugfs_last_hbq = 0;
	}
	else
		lpfc_debugfs_last_hbq = 0;

	i = lpfc_debugfs_last_hbq;

	len +=  snprintf(buf+len, size-len, "HBQ %d Info\n", i);

	hbqs =  &phba->hbqs[i];
	posted = 0;
	list_for_each_entry(d_buf, &hbqs->hbq_buffer_list, list)
		posted++;

	hip =  lpfc_hbq_defs[i];
	len +=  snprintf(buf+len, size-len,
		"idx:%d prof:%d rn:%d bufcnt:%d icnt:%d acnt:%d posted %d\n",
		hip->hbq_index, hip->profile, hip->rn,
		hip->buffer_count, hip->init_count, hip->add_count, posted);

	raw_index = phba->hbq_get[i];
	getidx = le32_to_cpu(raw_index);
	len +=  snprintf(buf+len, size-len,
		"entrys:%d bufcnt:%d Put:%d nPut:%d localGet:%d hbaGet:%d\n",
		hbqs->entry_count, hbqs->buffer_count, hbqs->hbqPutIdx,
		hbqs->next_hbqPutIdx, hbqs->local_hbqGetIdx, getidx);

	hbqe = (struct lpfc_hbq_entry *) phba->hbqs[i].hbq_virt;
	for (j=0; j<hbqs->entry_count; j++) {
		len +=  snprintf(buf+len, size-len,
			"%03d: %08x %04x %05x ", j,
			le32_to_cpu(hbqe->bde.addrLow),
			le32_to_cpu(hbqe->bde.tus.w),
			le32_to_cpu(hbqe->buffer_tag));
		i = 0;
		found = 0;

		/* First calculate if slot has an associated posted buffer */
		low = hbqs->hbqPutIdx - posted;
		if (low >= 0) {
			if ((j >= hbqs->hbqPutIdx) || (j < low)) {
				len +=  snprintf(buf+len, size-len, "Unused\n");
				goto skipit;
			}
		}
		else {
			if ((j >= hbqs->hbqPutIdx) &&
				(j < (hbqs->entry_count+low))) {
				len +=  snprintf(buf+len, size-len, "Unused\n");
				goto skipit;
			}
		}

		/* Get the Buffer info for the posted buffer */
		list_for_each_entry(d_buf, &hbqs->hbq_buffer_list, list) {
			hbq_buf = container_of(d_buf, struct hbq_dmabuf, dbuf);
			phys = ((uint64_t)hbq_buf->dbuf.phys & 0xffffffff);
			if (phys == le32_to_cpu(hbqe->bde.addrLow)) {
				len +=  snprintf(buf+len, size-len,
					"Buf%d: %p %06x\n", i,
					hbq_buf->dbuf.virt, hbq_buf->tag);
				found = 1;
				break;
			}
			i++;
		}
		if (!found) {
			len +=  snprintf(buf+len, size-len, "No DMAinfo?\n");
		}
skipit:
		hbqe++;
		if (len > LPFC_HBQINFO_SIZE - 54)
			break;
	}
	spin_unlock_irq(&phba->hbalock);
	return len;
}

static int lpfc_debugfs_last_hba_slim_off;

/**
 * lpfc_debugfs_dumpHBASlim_data - Dump HBA SLIM info to a buffer
 * @phba: The HBA to gather SLIM info from.
 * @buf: The buffer to dump log into.
 * @size: The maximum amount of data to process.
 *
 * Description:
 * This routine dumps the current contents of HBA SLIM for the HBA associated
 * with @phba to @buf up to @size bytes of data. This is the raw HBA SLIM data.
 *
 * Notes:
 * This routine will only dump up to 1024 bytes of data each time called and
 * should be called multiple times to dump the entire HBA SLIM.
 *
 * Return Value:
 * This routine returns the amount of bytes that were dumped into @buf and will
 * not exceed @size.
 **/
static int
lpfc_debugfs_dumpHBASlim_data(struct lpfc_hba *phba, char *buf, int size)
{
	int len = 0;
	int i, off;
	uint32_t *ptr;
	char buffer[1024];

	off = 0;
	spin_lock_irq(&phba->hbalock);

	len +=  snprintf(buf+len, size-len, "HBA SLIM\n");
	lpfc_memcpy_from_slim(buffer,
		phba->MBslimaddr + lpfc_debugfs_last_hba_slim_off, 1024);

	ptr = (uint32_t *)&buffer[0];
	off = lpfc_debugfs_last_hba_slim_off;

	/* Set it up for the next time */
	lpfc_debugfs_last_hba_slim_off += 1024;
	if (lpfc_debugfs_last_hba_slim_off >= 4096)
		lpfc_debugfs_last_hba_slim_off = 0;

	i = 1024;
	while (i > 0) {
		len +=  snprintf(buf+len, size-len,
		"%08x: %08x %08x %08x %08x %08x %08x %08x %08x\n",
		off, *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4),
		*(ptr+5), *(ptr+6), *(ptr+7));
		ptr += 8;
		i -= (8 * sizeof(uint32_t));
		off += (8 * sizeof(uint32_t));
	}

	spin_unlock_irq(&phba->hbalock);
	return len;
}

/**
 * lpfc_debugfs_dumpHostSlim_data - Dump host SLIM info to a buffer
 * @phba: The HBA to gather Host SLIM info from.
 * @buf: The buffer to dump log into.
 * @size: The maximum amount of data to process.
 *
 * Description:
 * This routine dumps the current contents of host SLIM for the host associated
 * with @phba to @buf up to @size bytes of data. The dump will contain the
 * Mailbox, PCB, Rings, and Registers that are located in host memory.
 *
 * Return Value:
 * This routine returns the amount of bytes that were dumped into @buf and will
 * not exceed @size.
 **/
static int
lpfc_debugfs_dumpHostSlim_data(struct lpfc_hba *phba, char *buf, int size)
{
	int len = 0;
	int i, off;
	uint32_t word0, word1, word2, word3;
	uint32_t *ptr;
	struct lpfc_pgp *pgpp;
	struct lpfc_sli *psli = &phba->sli;
	struct lpfc_sli_ring *pring;

	off = 0;
	spin_lock_irq(&phba->hbalock);

	len +=  snprintf(buf+len, size-len, "SLIM Mailbox\n");
	ptr = (uint32_t *)phba->slim2p.virt;
	i = sizeof(MAILBOX_t);
	while (i > 0) {
		len +=  snprintf(buf+len, size-len,
		"%08x: %08x %08x %08x %08x %08x %08x %08x %08x\n",
		off, *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4),
		*(ptr+5), *(ptr+6), *(ptr+7));
		ptr += 8;
		i -= (8 * sizeof(uint32_t));
		off += (8 * sizeof(uint32_t));
	}

	len +=  snprintf(buf+len, size-len, "SLIM PCB\n");
	ptr = (uint32_t *)phba->pcb;
	i = sizeof(PCB_t);
	while (i > 0) {
		len +=  snprintf(buf+len, size-len,
		"%08x: %08x %08x %08x %08x %08x %08x %08x %08x\n",
		off, *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4),
		*(ptr+5), *(ptr+6), *(ptr+7));
		ptr += 8;
		i -= (8 * sizeof(uint32_t));
		off += (8 * sizeof(uint32_t));
	}

	for (i = 0; i < 4; i++) {
		pgpp = &phba->port_gp[i];
		pring = &psli->ring[i];
		len +=  snprintf(buf+len, size-len,
				 "Ring %d: CMD GetInx:%d (Max:%d Next:%d "
				 "Local:%d flg:x%x)  RSP PutInx:%d Max:%d\n",
				 i, pgpp->cmdGetInx, pring->numCiocb,
				 pring->next_cmdidx, pring->local_getidx,
				 pring->flag, pgpp->rspPutInx, pring->numRiocb);
	}

	if (phba->sli_rev <= LPFC_SLI_REV3) {
		word0 = readl(phba->HAregaddr);
		word1 = readl(phba->CAregaddr);
		word2 = readl(phba->HSregaddr);
		word3 = readl(phba->HCregaddr);
		len +=  snprintf(buf+len, size-len, "HA:%08x CA:%08x HS:%08x "
				 "HC:%08x\n", word0, word1, word2, word3);
	}
	spin_unlock_irq(&phba->hbalock);
	return len;
}

/**
 * lpfc_debugfs_nodelist_data - Dump target node list to a buffer
 * @vport: The vport to gather target node info from.
 * @buf: The buffer to dump log into.
 * @size: The maximum amount of data to process.
 *
 * Description:
 * This routine dumps the current target node list associated with @vport to
 * @buf up to @size bytes of data. Each node entry in the dump will contain a
 * node state, DID, WWPN, WWNN, RPI, flags, type, and other useful fields.
 *
 * Return Value:
 * This routine returns the amount of bytes that were dumped into @buf and will
 * not exceed @size.
 **/
static int
lpfc_debugfs_nodelist_data(struct lpfc_vport *vport, char *buf, int size)
{
	int len = 0;
	int cnt;
	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
	struct lpfc_nodelist *ndlp;
	unsigned char *statep, *name;

	cnt = (LPFC_NODELIST_SIZE / LPFC_NODELIST_ENTRY_SIZE);

	spin_lock_irq(shost->host_lock);
	list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
		if (!cnt) {
			len +=  snprintf(buf+len, size-len,
				"Missing Nodelist Entries\n");
			break;
		}
		cnt--;
		switch (ndlp->nlp_state) {
		case NLP_STE_UNUSED_NODE:
			statep = "UNUSED";
			break;
		case NLP_STE_PLOGI_ISSUE:
			statep = "PLOGI ";
			break;
		case NLP_STE_ADISC_ISSUE:
			statep = "ADISC ";
			break;
		case NLP_STE_REG_LOGIN_ISSUE:
			statep = "REGLOG";
			break;
		case NLP_STE_PRLI_ISSUE:
			statep = "PRLI  ";
			break;
		case NLP_STE_UNMAPPED_NODE:
			statep = "UNMAP ";
			break;
		case NLP_STE_MAPPED_NODE:
			statep = "MAPPED";
			break;
		case NLP_STE_NPR_NODE:
			statep = "NPR   ";
			break;
		default:
			statep = "UNKNOWN";
		}
		len +=  snprintf(buf+len, size-len, "%s DID:x%06x ",
			statep, ndlp->nlp_DID);
		name = (unsigned char *)&ndlp->nlp_portname;
		len +=  snprintf(buf+len, size-len,
			"WWPN %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x ",
			*name, *(name+1), *(name+2), *(name+3),
			*(name+4), *(name+5), *(name+6), *(name+7));
		name = (unsigned char *)&ndlp->nlp_nodename;
		len +=  snprintf(buf+len, size-len,
			"WWNN %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x ",
			*name, *(name+1), *(name+2), *(name+3),
			*(name+4), *(name+5), *(name+6), *(name+7));
		len +=  snprintf(buf+len, size-len, "RPI:%03d flag:x%08x ",
			ndlp->nlp_rpi, ndlp->nlp_flag);
		if (!ndlp->nlp_type)
			len +=  snprintf(buf+len, size-len, "UNKNOWN_TYPE ");
		if (ndlp->nlp_type & NLP_FC_NODE)
			len +=  snprintf(buf+len, size-len, "FC_NODE ");
		if (ndlp->nlp_type & NLP_FABRIC)
			len +=  snprintf(buf+len, size-len, "FABRIC ");
		if (ndlp->nlp_type & NLP_FCP_TARGET)
			len +=  snprintf(buf+len, size-len, "FCP_TGT sid:%d ",
				ndlp->nlp_sid);
		if (ndlp->nlp_type & NLP_FCP_INITIATOR)
			len +=  snprintf(buf+len, size-len, "FCP_INITIATOR ");
		len += snprintf(buf+len, size-len, "usgmap:%x ",
			ndlp->nlp_usg_map);
		len += snprintf(buf+len, size-len, "refcnt:%x",
			atomic_read(&ndlp->kref.refcount));
		len +=  snprintf(buf+len, size-len, "\n");
	}
	spin_unlock_irq(shost->host_lock);
	return len;
}
#endif

/**
 * lpfc_debugfs_disc_trc - Store discovery trace log
 * @vport: The vport to associate this trace string with for retrieval.
 * @mask: Log entry classification.
 * @fmt: Format string to be displayed when dumping the log.
 * @data1: 1st data parameter to be applied to @fmt.
 * @data2: 2nd data parameter to be applied to @fmt.
 * @data3: 3rd data parameter to be applied to @fmt.
 *
 * Description:
 * This routine is used by the driver code to add a debugfs log entry to the
 * discovery trace buffer associated with @vport. Only entries with a @mask that
 * match the current debugfs discovery mask will be saved. Entries that do not
 * match will be thrown away. @fmt, @data1, @data2, and @data3 are used like
 * printf when displaying the log.
 **/
inline void
lpfc_debugfs_disc_trc(struct lpfc_vport *vport, int mask, char *fmt,
	uint32_t data1, uint32_t data2, uint32_t data3)
{
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
	struct lpfc_debugfs_trc *dtp;
	int index;

	if (!(lpfc_debugfs_mask_disc_trc & mask))
		return;

	if (!lpfc_debugfs_enable || !lpfc_debugfs_max_disc_trc ||
		!vport || !vport->disc_trc)
		return;

	index = atomic_inc_return(&vport->disc_trc_cnt) &
		(lpfc_debugfs_max_disc_trc - 1);
	dtp = vport->disc_trc + index;
	dtp->fmt = fmt;
	dtp->data1 = data1;
	dtp->data2 = data2;
	dtp->data3 = data3;
	dtp->seq_cnt = atomic_inc_return(&lpfc_debugfs_seq_trc_cnt);
	dtp->jif = jiffies;
#endif
	return;
}

/**
 * lpfc_debugfs_slow_ring_trc - Store slow ring trace log
 * @phba: The phba to associate this trace string with for retrieval.
 * @fmt: Format string to be displayed when dumping the log.
 * @data1: 1st data parameter to be applied to @fmt.
 * @data2: 2nd data parameter to be applied to @fmt.
 * @data3: 3rd data parameter to be applied to @fmt.
 *
 * Description:
 * This routine is used by the driver code to add a debugfs log entry to the
 * discovery trace buffer associated with @vport. @fmt, @data1, @data2, and
 * @data3 are used like printf when displaying the log.
 **/
inline void
lpfc_debugfs_slow_ring_trc(struct lpfc_hba *phba, char *fmt,
	uint32_t data1, uint32_t data2, uint32_t data3)
{
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
	struct lpfc_debugfs_trc *dtp;
	int index;

	if (!lpfc_debugfs_enable || !lpfc_debugfs_max_slow_ring_trc ||
		!phba || !phba->slow_ring_trc)
		return;

	index = atomic_inc_return(&phba->slow_ring_trc_cnt) &
		(lpfc_debugfs_max_slow_ring_trc - 1);
	dtp = phba->slow_ring_trc + index;
	dtp->fmt = fmt;
	dtp->data1 = data1;
	dtp->data2 = data2;
	dtp->data3 = data3;
	dtp->seq_cnt = atomic_inc_return(&lpfc_debugfs_seq_trc_cnt);
	dtp->jif = jiffies;
#endif
	return;
}

#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
/**
 * lpfc_debugfs_disc_trc_open - Open the discovery trace log
 * @inode: The inode pointer that contains a vport pointer.
 * @file: The file pointer to attach the log output.
 *
 * Description:
 * This routine is the entry point for the debugfs open file operation. It gets
 * the vport from the i_private field in @inode, allocates the necessary buffer
 * for the log, fills the buffer from the in-memory log for this vport, and then
 * returns a pointer to that log in the private_data field in @file.
 *
 * Returns:
 * This function returns zero if successful. On error it will return an negative
 * error value.
 **/
static int
lpfc_debugfs_disc_trc_open(struct inode *inode, struct file *file)
{
	struct lpfc_vport *vport = inode->i_private;
	struct lpfc_debug *debug;
	int size;
	int rc = -ENOMEM;

	if (!lpfc_debugfs_max_disc_trc) {
		 rc = -ENOSPC;
		goto out;
	}

	debug = kmalloc(sizeof(*debug), GFP_KERNEL);
	if (!debug)
		goto out;

	/* Round to page boundary */
	size =  (lpfc_debugfs_max_disc_trc * LPFC_DEBUG_TRC_ENTRY_SIZE);
	size = PAGE_ALIGN(size);

	debug->buffer = kmalloc(size, GFP_KERNEL);
	if (!debug->buffer) {
		kfree(debug);
		goto out;
	}

	debug->len = lpfc_debugfs_disc_trc_data(vport, debug->buffer, size);
	file->private_data = debug;

	rc = 0;
out:
	return rc;
}

/**
 * lpfc_debugfs_slow_ring_trc_open - Open the Slow Ring trace log
 * @inode: The inode pointer that contains a vport pointer.
 * @file: The file pointer to attach the log output.
 *
 * Description:
 * This routine is the entry point for the debugfs open file operation. It gets
 * the vport from the i_private field in @inode, allocates the necessary buffer
 * for the log, fills the buffer from the in-memory log for this vport, and then
 * returns a pointer to that log in the private_data field in @file.
 *
 * Returns:
 * This function returns zero if successful. On error it will return an negative
 * error value.
 **/
static int
lpfc_debugfs_slow_ring_trc_open(struct inode *inode, struct file *file)
{
	struct lpfc_hba *phba = inode->i_private;
	struct lpfc_debug *debug;
	int size;
	int rc = -ENOMEM;

	if (!lpfc_debugfs_max_slow_ring_trc) {
		 rc = -ENOSPC;
		goto out;
	}

	debug = kmalloc(sizeof(*debug), GFP_KERNEL);
	if (!debug)
		goto out;

	/* Round to page boundary */
	size =  (lpfc_debugfs_max_slow_ring_trc * LPFC_DEBUG_TRC_ENTRY_SIZE);
	size = PAGE_ALIGN(size);

	debug->buffer = kmalloc(size, GFP_KERNEL);
	if (!debug->buffer) {
		kfree(debug);
		goto out;
	}

	debug->len = lpfc_debugfs_slow_ring_trc_data(phba, debug->buffer, size);
	file->private_data = debug;

	rc = 0;
out:
	return rc;
}

/**
 * lpfc_debugfs_hbqinfo_open - Open the hbqinfo debugfs buffer
 * @inode: The inode pointer that contains a vport pointer.
 * @file: The file pointer to attach the log output.
 *
 * Description:
 * This routine is the entry point for the debugfs open file operation. It gets
 * the vport from the i_private field in @inode, allocates the necessary buffer
 * for the log, fills the buffer from the in-memory log for this vport, and then
 * returns a pointer to that log in the private_data field in @file.
 *
 * Returns:
 * This function returns zero if successful. On error it will return an negative
 * error value.
 **/
static int
lpfc_debugfs_hbqinfo_open(struct inode *inode, struct file *file)
{
	struct lpfc_hba *phba = inode->i_private;
	struct lpfc_debug *debug;
	int rc = -ENOMEM;

	debug = kmalloc(sizeof(*debug), GFP_KERNEL);
	if (!debug)
		goto out;

	/* Round to page boundary */
	debug->buffer = kmalloc(LPFC_HBQINFO_SIZE, GFP_KERNEL);
	if (!debug->buffer) {
		kfree(debug);
		goto out;
	}

	debug->len = lpfc_debugfs_hbqinfo_data(phba, debug->buffer,
		LPFC_HBQINFO_SIZE);
	file->private_data = debug;

	rc = 0;
out:
	return rc;
}

/**
 * lpfc_debugfs_dumpHBASlim_open - Open the Dump HBA SLIM debugfs buffer
 * @inode: The inode pointer that contains a vport pointer.
 * @file: The file pointer to attach the log output.
 *
 * Description:
 * This routine is the entry point for the debugfs open file operation. It gets
 * the vport from the i_private field in @inode, allocates the necessary buffer
 * for the log, fills the buffer from the in-memory log for this vport, and then
 * returns a pointer to that log in the private_data field in @file.
 *
 * Returns:
 * This function returns zero if successful. On error it will return an negative
 * error value.
 **/
static int
lpfc_debugfs_dumpHBASlim_open(struct inode *inode, struct file *file)
{
	struct lpfc_hba *phba = inode->i_private;
	struct lpfc_debug *debug;
	int rc = -ENOMEM;

	debug = kmalloc(sizeof(*debug), GFP_KERNEL);
	if (!debug)
		goto out;

	/* Round to page boundary */
	debug->buffer = kmalloc(LPFC_DUMPHBASLIM_SIZE, GFP_KERNEL);
	if (!debug->buffer) {
		kfree(debug);
		goto out;
	}

	debug->len = lpfc_debugfs_dumpHBASlim_data(phba, debug->buffer,
		LPFC_DUMPHBASLIM_SIZE);
	file->private_data = debug;

	rc = 0;
out:
	return rc;
}

/**
 * lpfc_debugfs_dumpHostSlim_open - Open the Dump Host SLIM debugfs buffer
 * @inode: The inode pointer that contains a vport pointer.
 * @file: The file pointer to attach the log output.
 *
 * Description:
 * This routine is the entry point for the debugfs open file operation. It gets
 * the vport from the i_private field in @inode, allocates the necessary buffer
 * for the log, fills the buffer from the in-memory log for this vport, and then
 * returns a pointer to that log in the private_data field in @file.
 *
 * Returns:
 * This function returns zero if successful. On error it will return an negative
 * error value.
 **/
static int
lpfc_debugfs_dumpHostSlim_open(struct inode *inode, struct file *file)
{
	struct lpfc_hba *phba = inode->i_private;
	struct lpfc_debug *debug;
	int rc = -ENOMEM;

	debug = kmalloc(sizeof(*debug), GFP_KERNEL);
	if (!debug)
		goto out;

	/* Round to page boundary */
	debug->buffer = kmalloc(LPFC_DUMPHOSTSLIM_SIZE, GFP_KERNEL);
	if (!debug->buffer) {
		kfree(debug);
		goto out;
	}

	debug->len = lpfc_debugfs_dumpHostSlim_data(phba, debug->buffer,
		LPFC_DUMPHOSTSLIM_SIZE);
	file->private_data = debug;

	rc = 0;
out:
	return rc;
}

static int
lpfc_debugfs_dumpData_open(struct inode *inode, struct file *file)
{
	struct lpfc_debug *debug;
	int rc = -ENOMEM;

	if (!_dump_buf_data)
		return -EBUSY;

	debug = kmalloc(sizeof(*debug), GFP_KERNEL);
	if (!debug)
		goto out;

	/* Round to page boundry */
	printk(KERN_ERR "9059 BLKGRD:  %s: _dump_buf_data=0x%p\n",
			__func__, _dump_buf_data);
	debug->buffer = _dump_buf_data;
	if (!debug->buffer) {
		kfree(debug);
		goto out;
	}

	debug->len = (1 << _dump_buf_data_order) << PAGE_SHIFT;
	file->private_data = debug;

	rc = 0;
out:
	return rc;
}

static int
lpfc_debugfs_dumpDif_open(struct inode *inode, struct file *file)
{
	struct lpfc_debug *debug;
	int rc = -ENOMEM;

	if (!_dump_buf_dif)
		return -EBUSY;

	debug = kmalloc(sizeof(*debug), GFP_KERNEL);
	if (!debug)
		goto out;

	/* Round to page boundry */
	printk(KERN_ERR	"9060 BLKGRD: %s: _dump_buf_dif=0x%p file=%s\n",
		__func__, _dump_buf_dif, file->f_dentry->d_name.name);
	debug->buffer = _dump_buf_dif;
	if (!debug->buffer) {
		kfree(debug);
		goto out;
	}

	debug->len = (1 << _dump_buf_dif_order) << PAGE_SHIFT;
	file->private_data = debug;

	rc = 0;
out:
	return rc;
}

static ssize_t
lpfc_debugfs_dumpDataDif_write(struct file *file, const char __user *buf,
		  size_t nbytes, loff_t *ppos)
{
	/*
	 * The Data/DIF buffers only save one failing IO
	 * The write op is used as a reset mechanism after an IO has
	 * already been saved to the next one can be saved
	 */
	spin_lock(&_dump_buf_lock);

	memset((void *)_dump_buf_data, 0,
			((1 << PAGE_SHIFT) << _dump_buf_data_order));
	memset((void *)_dump_buf_dif, 0,
			((1 << PAGE_SHIFT) << _dump_buf_dif_order));

	_dump_buf_done = 0;

	spin_unlock(&_dump_buf_lock);

	return nbytes;
}



/**
 * lpfc_debugfs_nodelist_open - Open the nodelist debugfs file
 * @inode: The inode pointer that contains a vport pointer.
 * @file: The file pointer to attach the log output.
 *
 * Description:
 * This routine is the entry point for the debugfs open file operation. It gets
 * the vport from the i_private field in @inode, allocates the necessary buffer
 * for the log, fills the buffer from the in-memory log for this vport, and then
 * returns a pointer to that log in the private_data field in @file.
 *
 * Returns:
 * This function returns zero if successful. On error it will return an negative
 * error value.
 **/
static int
lpfc_debugfs_nodelist_open(struct inode *inode, struct file *file)
{
	struct lpfc_vport *vport = inode->i_private;
	struct lpfc_debug *debug;
	int rc = -ENOMEM;

	debug = kmalloc(sizeof(*debug), GFP_KERNEL);
	if (!debug)
		goto out;

	/* Round to page boundary */
	debug->buffer = kmalloc(LPFC_NODELIST_SIZE, GFP_KERNEL);
	if (!debug->buffer) {
		kfree(debug);
		goto out;
	}

	debug->len = lpfc_debugfs_nodelist_data(vport, debug->buffer,
		LPFC_NODELIST_SIZE);
	file->private_data = debug;

	rc = 0;
out:
	return rc;
}

/**
 * lpfc_debugfs_lseek - Seek through a debugfs file
 * @file: The file pointer to seek through.
 * @off: The offset to seek to or the amount to seek by.
 * @whence: Indicates how to seek.
 *
 * Description:
 * This routine is the entry point for the debugfs lseek file operation. The
 * @whence parameter indicates whether @off is the offset to directly seek to,
 * or if it is a value to seek forward or reverse by. This function figures out
 * what the new offset of the debugfs file will be and assigns that value to the
 * f_pos field of @file.
 *
 * Returns:
 * This function returns the new offset if successful and returns a negative
 * error if unable to process the seek.
 **/
static loff_t
lpfc_debugfs_lseek(struct file *file, loff_t off, int whence)
{
	struct lpfc_debug *debug;
	loff_t pos = -1;

	debug = file->private_data;

	switch (whence) {
	case 0:
		pos = off;
		break;
	case 1:
		pos = file->f_pos + off;
		break;
	case 2:
		pos = debug->len - off;
	}
	return (pos < 0 || pos > debug->len) ? -EINVAL : (file->f_pos = pos);
}

/**
 * lpfc_debugfs_read - Read a debugfs file
 * @file: The file pointer to read from.
 * @buf: The buffer to copy the data to.
 * @nbytes: The number of bytes to read.
 * @ppos: The position in the file to start reading from.
 *
 * Description:
 * This routine reads data from from the buffer indicated in the private_data
 * field of @file. It will start reading at @ppos and copy up to @nbytes of
 * data to @buf.
 *
 * Returns:
 * This function returns the amount of data that was read (this could be less
 * than @nbytes if the end of the file was reached) or a negative error value.
 **/
static ssize_t
lpfc_debugfs_read(struct file *file, char __user *buf,
		  size_t nbytes, loff_t *ppos)
{
	struct lpfc_debug *debug = file->private_data;
	return simple_read_from_buffer(buf, nbytes, ppos, debug->buffer,
				       debug->len);
}

/**
 * lpfc_debugfs_release - Release the buffer used to store debugfs file data
 * @inode: The inode pointer that contains a vport pointer. (unused)
 * @file: The file pointer that contains the buffer to release.
 *
 * Description:
 * This routine frees the buffer that was allocated when the debugfs file was
 * opened.
 *
 * Returns:
 * This function returns zero.
 **/
static int
lpfc_debugfs_release(struct inode *inode, struct file *file)
{
	struct lpfc_debug *debug = file->private_data;

	kfree(debug->buffer);
	kfree(debug);

	return 0;
}

static int
lpfc_debugfs_dumpDataDif_release(struct inode *inode, struct file *file)
{
	struct lpfc_debug *debug = file->private_data;

	debug->buffer = NULL;
	kfree(debug);

	return 0;
}

#undef lpfc_debugfs_op_disc_trc
static const struct file_operations lpfc_debugfs_op_disc_trc = {
	.owner =        THIS_MODULE,
	.open =         lpfc_debugfs_disc_trc_open,
	.llseek =       lpfc_debugfs_lseek,
	.read =         lpfc_debugfs_read,
	.release =      lpfc_debugfs_release,
};

#undef lpfc_debugfs_op_nodelist
static const struct file_operations lpfc_debugfs_op_nodelist = {
	.owner =        THIS_MODULE,
	.open =         lpfc_debugfs_nodelist_open,
	.llseek =       lpfc_debugfs_lseek,
	.read =         lpfc_debugfs_read,
	.release =      lpfc_debugfs_release,
};

#undef lpfc_debugfs_op_hbqinfo
static const struct file_operations lpfc_debugfs_op_hbqinfo = {
	.owner =        THIS_MODULE,
	.open =         lpfc_debugfs_hbqinfo_open,
	.llseek =       lpfc_debugfs_lseek,
	.read =         lpfc_debugfs_read,
	.release =      lpfc_debugfs_release,
};

#undef lpfc_debugfs_op_dumpHBASlim
static const struct file_operations lpfc_debugfs_op_dumpHBASlim = {
	.owner =        THIS_MODULE,
	.open =         lpfc_debugfs_dumpHBASlim_open,
	.llseek =       lpfc_debugfs_lseek,
	.read =         lpfc_debugfs_read,
	.release =      lpfc_debugfs_release,
};

#undef lpfc_debugfs_op_dumpHostSlim
static const struct file_operations lpfc_debugfs_op_dumpHostSlim = {
	.owner =        THIS_MODULE,
	.open =         lpfc_debugfs_dumpHostSlim_open,
	.llseek =       lpfc_debugfs_lseek,
	.read =         lpfc_debugfs_read,
	.release =      lpfc_debugfs_release,
};

#undef lpfc_debugfs_op_dumpData
static const struct file_operations lpfc_debugfs_op_dumpData = {
	.owner =        THIS_MODULE,
	.open =         lpfc_debugfs_dumpData_open,
	.llseek =       lpfc_debugfs_lseek,
	.read =         lpfc_debugfs_read,
	.write =	lpfc_debugfs_dumpDataDif_write,
	.release =      lpfc_debugfs_dumpDataDif_release,
};

#undef lpfc_debugfs_op_dumpDif
static const struct file_operations lpfc_debugfs_op_dumpDif = {
	.owner =        THIS_MODULE,
	.open =         lpfc_debugfs_dumpDif_open,
	.llseek =       lpfc_debugfs_lseek,
	.read =         lpfc_debugfs_read,
	.write =	lpfc_debugfs_dumpDataDif_write,
	.release =      lpfc_debugfs_dumpDataDif_release,
};

#undef lpfc_debugfs_op_slow_ring_trc
static const struct file_operations lpfc_debugfs_op_slow_ring_trc = {
	.owner =        THIS_MODULE,
	.open =         lpfc_debugfs_slow_ring_trc_open,
	.llseek =       lpfc_debugfs_lseek,
	.read =         lpfc_debugfs_read,
	.release =      lpfc_debugfs_release,
};

static struct dentry *lpfc_debugfs_root = NULL;
static atomic_t lpfc_debugfs_hba_count;
#endif

/**
 * lpfc_debugfs_initialize - Initialize debugfs for a vport
 * @vport: The vport pointer to initialize.
 *
 * Description:
 * When Debugfs is configured this routine sets up the lpfc debugfs file system.
 * If not already created, this routine will create the lpfc directory, and
 * lpfcX directory (for this HBA), and vportX directory for this vport. It will
 * also create each file used to access lpfc specific debugfs information.
 **/
inline void
lpfc_debugfs_initialize(struct lpfc_vport *vport)
{
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
	struct lpfc_hba   *phba = vport->phba;
	char name[64];
	uint32_t num, i;

	if (!lpfc_debugfs_enable)
		return;

	/* Setup lpfc root directory */
	if (!lpfc_debugfs_root) {
		lpfc_debugfs_root = debugfs_create_dir("lpfc", NULL);
		atomic_set(&lpfc_debugfs_hba_count, 0);
		if (!lpfc_debugfs_root) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
					 "0408 Cannot create debugfs root\n");
			goto debug_failed;
		}
	}
	if (!lpfc_debugfs_start_time)
		lpfc_debugfs_start_time = jiffies;

	/* Setup lpfcX directory for specific HBA */
	snprintf(name, sizeof(name), "lpfc%d", phba->brd_no);
	if (!phba->hba_debugfs_root) {
		phba->hba_debugfs_root =
			debugfs_create_dir(name, lpfc_debugfs_root);
		if (!phba->hba_debugfs_root) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
					 "0412 Cannot create debugfs hba\n");
			goto debug_failed;
		}
		atomic_inc(&lpfc_debugfs_hba_count);
		atomic_set(&phba->debugfs_vport_count, 0);

		/* Setup hbqinfo */
		snprintf(name, sizeof(name), "hbqinfo");
		phba->debug_hbqinfo =
			debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
				 phba->hba_debugfs_root,
				 phba, &lpfc_debugfs_op_hbqinfo);
		if (!phba->debug_hbqinfo) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
				"0411 Cannot create debugfs hbqinfo\n");
			goto debug_failed;
		}

		/* Setup dumpHBASlim */
		snprintf(name, sizeof(name), "dumpHBASlim");
		phba->debug_dumpHBASlim =
			debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
				 phba->hba_debugfs_root,
				 phba, &lpfc_debugfs_op_dumpHBASlim);
		if (!phba->debug_dumpHBASlim) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
				"0413 Cannot create debugfs dumpHBASlim\n");
			goto debug_failed;
		}

		/* Setup dumpHostSlim */
		snprintf(name, sizeof(name), "dumpHostSlim");
		phba->debug_dumpHostSlim =
			debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
				 phba->hba_debugfs_root,
				 phba, &lpfc_debugfs_op_dumpHostSlim);
		if (!phba->debug_dumpHostSlim) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
				"0414 Cannot create debugfs dumpHostSlim\n");
			goto debug_failed;
		}

		/* Setup dumpData */
		snprintf(name, sizeof(name), "dumpData");
		phba->debug_dumpData =
			debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
				 phba->hba_debugfs_root,
				 phba, &lpfc_debugfs_op_dumpData);
		if (!phba->debug_dumpData) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
				"0800 Cannot create debugfs dumpData\n");
			goto debug_failed;
		}

		/* Setup dumpDif */
		snprintf(name, sizeof(name), "dumpDif");
		phba->debug_dumpDif =
			debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
				 phba->hba_debugfs_root,
				 phba, &lpfc_debugfs_op_dumpDif);
		if (!phba->debug_dumpDif) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
				"0801 Cannot create debugfs dumpDif\n");
			goto debug_failed;
		}



		/* Setup slow ring trace */
		if (lpfc_debugfs_max_slow_ring_trc) {
			num = lpfc_debugfs_max_slow_ring_trc - 1;
			if (num & lpfc_debugfs_max_slow_ring_trc) {
				/* Change to be a power of 2 */
				num = lpfc_debugfs_max_slow_ring_trc;
				i = 0;
				while (num > 1) {
					num = num >> 1;
					i++;
				}
				lpfc_debugfs_max_slow_ring_trc = (1 << i);
				printk(KERN_ERR
				       "lpfc_debugfs_max_disc_trc changed to "
				       "%d\n", lpfc_debugfs_max_disc_trc);
			}
		}


		snprintf(name, sizeof(name), "slow_ring_trace");
		phba->debug_slow_ring_trc =
			debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
				 phba->hba_debugfs_root,
				 phba, &lpfc_debugfs_op_slow_ring_trc);
		if (!phba->debug_slow_ring_trc) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
					 "0415 Cannot create debugfs "
					 "slow_ring_trace\n");
			goto debug_failed;
		}
		if (!phba->slow_ring_trc) {
			phba->slow_ring_trc = kmalloc(
				(sizeof(struct lpfc_debugfs_trc) *
				lpfc_debugfs_max_slow_ring_trc),
				GFP_KERNEL);
			if (!phba->slow_ring_trc) {
				lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
						 "0416 Cannot create debugfs "
						 "slow_ring buffer\n");
				goto debug_failed;
			}
			atomic_set(&phba->slow_ring_trc_cnt, 0);
			memset(phba->slow_ring_trc, 0,
				(sizeof(struct lpfc_debugfs_trc) *
				lpfc_debugfs_max_slow_ring_trc));
		}
	}

	snprintf(name, sizeof(name), "vport%d", vport->vpi);
	if (!vport->vport_debugfs_root) {
		vport->vport_debugfs_root =
			debugfs_create_dir(name, phba->hba_debugfs_root);
		if (!vport->vport_debugfs_root) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
					 "0417 Cant create debugfs\n");
			goto debug_failed;
		}
		atomic_inc(&phba->debugfs_vport_count);
	}

	if (lpfc_debugfs_max_disc_trc) {
		num = lpfc_debugfs_max_disc_trc - 1;
		if (num & lpfc_debugfs_max_disc_trc) {
			/* Change to be a power of 2 */
			num = lpfc_debugfs_max_disc_trc;
			i = 0;
			while (num > 1) {
				num = num >> 1;
				i++;
			}
			lpfc_debugfs_max_disc_trc = (1 << i);
			printk(KERN_ERR
			       "lpfc_debugfs_max_disc_trc changed to %d\n",
			       lpfc_debugfs_max_disc_trc);
		}
	}

	vport->disc_trc = kzalloc(
		(sizeof(struct lpfc_debugfs_trc) * lpfc_debugfs_max_disc_trc),
		GFP_KERNEL);

	if (!vport->disc_trc) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
				 "0418 Cannot create debugfs disc trace "
				 "buffer\n");
		goto debug_failed;
	}
	atomic_set(&vport->disc_trc_cnt, 0);

	snprintf(name, sizeof(name), "discovery_trace");
	vport->debug_disc_trc =
		debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
				 vport->vport_debugfs_root,
				 vport, &lpfc_debugfs_op_disc_trc);
	if (!vport->debug_disc_trc) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
				 "0419 Cannot create debugfs "
				 "discovery_trace\n");
		goto debug_failed;
	}
	snprintf(name, sizeof(name), "nodelist");
	vport->debug_nodelist =
		debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
				 vport->vport_debugfs_root,
				 vport, &lpfc_debugfs_op_nodelist);
	if (!vport->debug_nodelist) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
				 "0409 Cant create debugfs nodelist\n");
		goto debug_failed;
	}
debug_failed:
	return;
#endif
}

/**
 * lpfc_debugfs_terminate -  Tear down debugfs infrastructure for this vport
 * @vport: The vport pointer to remove from debugfs.
 *
 * Description:
 * When Debugfs is configured this routine removes debugfs file system elements
 * that are specific to this vport. It also checks to see if there are any
 * users left for the debugfs directories associated with the HBA and driver. If
 * this is the last user of the HBA directory or driver directory then it will
 * remove those from the debugfs infrastructure as well.
 **/
inline void
lpfc_debugfs_terminate(struct lpfc_vport *vport)
{
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
	struct lpfc_hba   *phba = vport->phba;

	if (vport->disc_trc) {
		kfree(vport->disc_trc);
		vport->disc_trc = NULL;
	}
	if (vport->debug_disc_trc) {
		debugfs_remove(vport->debug_disc_trc); /* discovery_trace */
		vport->debug_disc_trc = NULL;
	}
	if (vport->debug_nodelist) {
		debugfs_remove(vport->debug_nodelist); /* nodelist */
		vport->debug_nodelist = NULL;
	}

	if (vport->vport_debugfs_root) {
		debugfs_remove(vport->vport_debugfs_root); /* vportX */
		vport->vport_debugfs_root = NULL;
		atomic_dec(&phba->debugfs_vport_count);
	}
	if (atomic_read(&phba->debugfs_vport_count) == 0) {

		if (phba->debug_hbqinfo) {
			debugfs_remove(phba->debug_hbqinfo); /* hbqinfo */
			phba->debug_hbqinfo = NULL;
		}
		if (phba->debug_dumpHBASlim) {
			debugfs_remove(phba->debug_dumpHBASlim); /* HBASlim */
			phba->debug_dumpHBASlim = NULL;
		}
		if (phba->debug_dumpHostSlim) {
			debugfs_remove(phba->debug_dumpHostSlim); /* HostSlim */
			phba->debug_dumpHostSlim = NULL;
		}
		if (phba->debug_dumpData) {
			debugfs_remove(phba->debug_dumpData); /* dumpData */
			phba->debug_dumpData = NULL;
		}

		if (phba->debug_dumpDif) {
			debugfs_remove(phba->debug_dumpDif); /* dumpDif */
			phba->debug_dumpDif = NULL;
		}

		if (phba->slow_ring_trc) {
			kfree(phba->slow_ring_trc);
			phba->slow_ring_trc = NULL;
		}
		if (phba->debug_slow_ring_trc) {
			/* slow_ring_trace */
			debugfs_remove(phba->debug_slow_ring_trc);
			phba->debug_slow_ring_trc = NULL;
		}

		if (phba->hba_debugfs_root) {
			debugfs_remove(phba->hba_debugfs_root); /* lpfcX */
			phba->hba_debugfs_root = NULL;
			atomic_dec(&lpfc_debugfs_hba_count);
		}

		if (atomic_read(&lpfc_debugfs_hba_count) == 0) {
			debugfs_remove(lpfc_debugfs_root); /* lpfc */
			lpfc_debugfs_root = NULL;
		}
	}
#endif
	return;
}