summaryrefslogtreecommitdiffstats
path: root/drivers/s390/scsi/zfcp_dbf.c
blob: fd33537d0b2bbc076299c29bffec9c8be5442aed (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
/*
 * This file is part of the zfcp device driver for
 * FCP adapters for IBM System z9 and zSeries.
 *
 * (C) Copyright IBM Corp. 2002, 2006
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <asm/debug.h>
#include <linux/ctype.h>
#include "zfcp_ext.h"

static u32 dbfsize = 4;

module_param(dbfsize, uint, 0400);
MODULE_PARM_DESC(dbfsize,
		 "number of pages for each debug feature area (default 4)");

#define ZFCP_LOG_AREA			ZFCP_LOG_AREA_OTHER

static inline int
zfcp_dbf_stck(char *out_buf, const char *label, unsigned long long stck)
{
	unsigned long long sec;
	struct timespec xtime;
	int len = 0;

	stck -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
	sec = stck >> 12;
	do_div(sec, 1000000);
	xtime.tv_sec = sec;
	stck -= (sec * 1000000) << 12;
	xtime.tv_nsec = ((stck * 1000) >> 12);
	len += sprintf(out_buf + len, "%-24s%011lu:%06lu\n",
		       label, xtime.tv_sec, xtime.tv_nsec);

	return len;
}

static int zfcp_dbf_tag(char *out_buf, const char *label, const char *tag)
{
	int len = 0, i;

	len += sprintf(out_buf + len, "%-24s", label);
	for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
		len += sprintf(out_buf + len, "%c", tag[i]);
	len += sprintf(out_buf + len, "\n");

	return len;
}

static int
zfcp_dbf_view(char *out_buf, const char *label, const char *format, ...)
{
	va_list arg;
	int len = 0;

	len += sprintf(out_buf + len, "%-24s", label);
	va_start(arg, format);
	len += vsprintf(out_buf + len, format, arg);
	va_end(arg);
	len += sprintf(out_buf + len, "\n");

	return len;
}

static int
zfcp_dbf_view_dump(char *out_buf, const char *label,
		   char *buffer, int buflen, int offset, int total_size)
{
	int len = 0;

	if (offset == 0)
		len += sprintf(out_buf + len, "%-24s  ", label);

	while (buflen--) {
		if (offset > 0) {
			if ((offset % 32) == 0)
				len += sprintf(out_buf + len, "\n%-24c  ", ' ');
			else if ((offset % 4) == 0)
				len += sprintf(out_buf + len, " ");
		}
		len += sprintf(out_buf + len, "%02x", *buffer++);
		if (++offset == total_size) {
			len += sprintf(out_buf + len, "\n");
			break;
		}
	}

	if (total_size == 0)
		len += sprintf(out_buf + len, "\n");

	return len;
}

static inline int
zfcp_dbf_view_header(debug_info_t * id, struct debug_view *view, int area,
		     debug_entry_t * entry, char *out_buf)
{
	struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
	int len = 0;

	if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
		len += zfcp_dbf_stck(out_buf + len, "timestamp",
				     entry->id.stck);
		len += zfcp_dbf_view(out_buf + len, "cpu", "%02i",
				     entry->id.fields.cpuid);
	} else {
		len += zfcp_dbf_view_dump(out_buf + len, NULL,
					  dump->data,
					  dump->size,
					  dump->offset, dump->total_size);
		if ((dump->offset + dump->size) == dump->total_size)
			len += sprintf(out_buf + len, "\n");
	}

	return len;
}

inline void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
{
	struct zfcp_adapter *adapter = fsf_req->adapter;
	struct fsf_qtcb *qtcb = fsf_req->qtcb;
	union fsf_prot_status_qual *prot_status_qual =
	    &qtcb->prefix.prot_status_qual;
	union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
	struct scsi_cmnd *scsi_cmnd;
	struct zfcp_port *port;
	struct zfcp_unit *unit;
	struct zfcp_send_els *send_els;
	struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
	struct zfcp_hba_dbf_record_response *response = &rec->type.response;
	int level;
	unsigned long flags;

	spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
	memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
	strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);

	if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
	    (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
		strncpy(rec->tag2, "perr", ZFCP_DBF_TAG_SIZE);
		level = 1;
	} else if (qtcb->header.fsf_status != FSF_GOOD) {
		strncpy(rec->tag2, "ferr", ZFCP_DBF_TAG_SIZE);
		level = 1;
	} else if ((fsf_req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
		   (fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) {
		strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE);
		level = 4;
	} else if ((prot_status_qual->doubleword[0] != 0) ||
		   (prot_status_qual->doubleword[1] != 0) ||
		   (fsf_status_qual->doubleword[0] != 0) ||
		   (fsf_status_qual->doubleword[1] != 0)) {
		strncpy(rec->tag2, "qual", ZFCP_DBF_TAG_SIZE);
		level = 3;
	} else {
		strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE);
		level = 6;
	}

	response->fsf_command = fsf_req->fsf_command;
	response->fsf_reqid = (unsigned long)fsf_req;
	response->fsf_seqno = fsf_req->seq_no;
	response->fsf_issued = fsf_req->issued;
	response->fsf_prot_status = qtcb->prefix.prot_status;
	response->fsf_status = qtcb->header.fsf_status;
	memcpy(response->fsf_prot_status_qual,
	       prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
	memcpy(response->fsf_status_qual,
	       fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
	response->fsf_req_status = fsf_req->status;
	response->sbal_first = fsf_req->sbal_first;
	response->sbal_curr = fsf_req->sbal_curr;
	response->sbal_last = fsf_req->sbal_last;
	response->pool = fsf_req->pool != NULL;
	response->erp_action = (unsigned long)fsf_req->erp_action;

	switch (fsf_req->fsf_command) {
	case FSF_QTCB_FCP_CMND:
		if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
			break;
		scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
		if (scsi_cmnd != NULL) {
			response->data.send_fcp.scsi_cmnd
			    = (unsigned long)scsi_cmnd;
			response->data.send_fcp.scsi_serial
			    = scsi_cmnd->serial_number;
		}
		break;

	case FSF_QTCB_OPEN_PORT_WITH_DID:
	case FSF_QTCB_CLOSE_PORT:
	case FSF_QTCB_CLOSE_PHYSICAL_PORT:
		port = (struct zfcp_port *)fsf_req->data;
		response->data.port.wwpn = port->wwpn;
		response->data.port.d_id = port->d_id;
		response->data.port.port_handle = qtcb->header.port_handle;
		break;

	case FSF_QTCB_OPEN_LUN:
	case FSF_QTCB_CLOSE_LUN:
		unit = (struct zfcp_unit *)fsf_req->data;
		port = unit->port;
		response->data.unit.wwpn = port->wwpn;
		response->data.unit.fcp_lun = unit->fcp_lun;
		response->data.unit.port_handle = qtcb->header.port_handle;
		response->data.unit.lun_handle = qtcb->header.lun_handle;
		break;

	case FSF_QTCB_SEND_ELS:
		send_els = (struct zfcp_send_els *)fsf_req->data;
		response->data.send_els.d_id = qtcb->bottom.support.d_id;
		response->data.send_els.ls_code = send_els->ls_code >> 24;
		break;

	case FSF_QTCB_ABORT_FCP_CMND:
	case FSF_QTCB_SEND_GENERIC:
	case FSF_QTCB_EXCHANGE_CONFIG_DATA:
	case FSF_QTCB_EXCHANGE_PORT_DATA:
	case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
	case FSF_QTCB_UPLOAD_CONTROL_FILE:
		break;
	}

	debug_event(adapter->hba_dbf, level,
		    rec, sizeof(struct zfcp_hba_dbf_record));
	spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
}

inline void
zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
			     struct fsf_status_read_buffer *status_buffer)
{
	struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
	unsigned long flags;

	spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
	memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
	strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
	strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);

	rec->type.status.failed = adapter->status_read_failed;
	if (status_buffer != NULL) {
		rec->type.status.status_type = status_buffer->status_type;
		rec->type.status.status_subtype = status_buffer->status_subtype;
		memcpy(&rec->type.status.queue_designator,
		       &status_buffer->queue_designator,
		       sizeof(struct fsf_queue_designator));

		switch (status_buffer->status_type) {
		case FSF_STATUS_READ_SENSE_DATA_AVAIL:
			rec->type.status.payload_size =
			    ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
			break;

		case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
			rec->type.status.payload_size =
			    ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
			break;

		case FSF_STATUS_READ_LINK_DOWN:
			switch (status_buffer->status_subtype) {
			case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
			case FSF_STATUS_READ_SUB_FDISC_FAILED:
				rec->type.status.payload_size =
					sizeof(struct fsf_link_down_info);
			}
			break;

		case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
			rec->type.status.payload_size =
			    ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
			break;
		}
		memcpy(&rec->type.status.payload,
		       &status_buffer->payload, rec->type.status.payload_size);
	}

	debug_event(adapter->hba_dbf, 2,
		    rec, sizeof(struct zfcp_hba_dbf_record));
	spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
}

inline void
zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter, unsigned int status,
			unsigned int qdio_error, unsigned int siga_error,
			int sbal_index, int sbal_count)
{
	struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
	unsigned long flags;

	spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
	memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
	strncpy(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE);
	rec->type.qdio.status = status;
	rec->type.qdio.qdio_error = qdio_error;
	rec->type.qdio.siga_error = siga_error;
	rec->type.qdio.sbal_index = sbal_index;
	rec->type.qdio.sbal_count = sbal_count;
	debug_event(adapter->hba_dbf, 0,
		    rec, sizeof(struct zfcp_hba_dbf_record));
	spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
}

static inline int
zfcp_hba_dbf_view_response(char *out_buf,
			   struct zfcp_hba_dbf_record_response *rec)
{
	int len = 0;

	len += zfcp_dbf_view(out_buf + len, "fsf_command", "0x%08x",
			     rec->fsf_command);
	len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
			     rec->fsf_reqid);
	len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
			     rec->fsf_seqno);
	len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
	len += zfcp_dbf_view(out_buf + len, "fsf_prot_status", "0x%08x",
			     rec->fsf_prot_status);
	len += zfcp_dbf_view(out_buf + len, "fsf_status", "0x%08x",
			     rec->fsf_status);
	len += zfcp_dbf_view_dump(out_buf + len, "fsf_prot_status_qual",
				  rec->fsf_prot_status_qual,
				  FSF_PROT_STATUS_QUAL_SIZE,
				  0, FSF_PROT_STATUS_QUAL_SIZE);
	len += zfcp_dbf_view_dump(out_buf + len, "fsf_status_qual",
				  rec->fsf_status_qual,
				  FSF_STATUS_QUALIFIER_SIZE,
				  0, FSF_STATUS_QUALIFIER_SIZE);
	len += zfcp_dbf_view(out_buf + len, "fsf_req_status", "0x%08x",
			     rec->fsf_req_status);
	len += zfcp_dbf_view(out_buf + len, "sbal_first", "0x%02x",
			     rec->sbal_first);
	len += zfcp_dbf_view(out_buf + len, "sbal_curr", "0x%02x",
			     rec->sbal_curr);
	len += zfcp_dbf_view(out_buf + len, "sbal_last", "0x%02x",
			     rec->sbal_last);
	len += zfcp_dbf_view(out_buf + len, "pool", "0x%02x", rec->pool);

	switch (rec->fsf_command) {
	case FSF_QTCB_FCP_CMND:
		if (rec->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
			break;
		len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
				     rec->data.send_fcp.scsi_cmnd);
		len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
				     rec->data.send_fcp.scsi_serial);
		break;

	case FSF_QTCB_OPEN_PORT_WITH_DID:
	case FSF_QTCB_CLOSE_PORT:
	case FSF_QTCB_CLOSE_PHYSICAL_PORT:
		len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
				     rec->data.port.wwpn);
		len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
				     rec->data.port.d_id);
		len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
				     rec->data.port.port_handle);
		break;

	case FSF_QTCB_OPEN_LUN:
	case FSF_QTCB_CLOSE_LUN:
		len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
				     rec->data.unit.wwpn);
		len += zfcp_dbf_view(out_buf + len, "fcp_lun", "0x%016Lx",
				     rec->data.unit.fcp_lun);
		len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
				     rec->data.unit.port_handle);
		len += zfcp_dbf_view(out_buf + len, "lun_handle", "0x%08x",
				     rec->data.unit.lun_handle);
		break;

	case FSF_QTCB_SEND_ELS:
		len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
				     rec->data.send_els.d_id);
		len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
				     rec->data.send_els.ls_code);
		break;

	case FSF_QTCB_ABORT_FCP_CMND:
	case FSF_QTCB_SEND_GENERIC:
	case FSF_QTCB_EXCHANGE_CONFIG_DATA:
	case FSF_QTCB_EXCHANGE_PORT_DATA:
	case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
	case FSF_QTCB_UPLOAD_CONTROL_FILE:
		break;
	}

	return len;
}

static inline int
zfcp_hba_dbf_view_status(char *out_buf, struct zfcp_hba_dbf_record_status *rec)
{
	int len = 0;

	len += zfcp_dbf_view(out_buf + len, "failed", "0x%02x", rec->failed);
	len += zfcp_dbf_view(out_buf + len, "status_type", "0x%08x",
			     rec->status_type);
	len += zfcp_dbf_view(out_buf + len, "status_subtype", "0x%08x",
			     rec->status_subtype);
	len += zfcp_dbf_view_dump(out_buf + len, "queue_designator",
				  (char *)&rec->queue_designator,
				  sizeof(struct fsf_queue_designator),
				  0, sizeof(struct fsf_queue_designator));
	len += zfcp_dbf_view_dump(out_buf + len, "payload",
				  (char *)&rec->payload,
				  rec->payload_size, 0, rec->payload_size);

	return len;
}

static inline int
zfcp_hba_dbf_view_qdio(char *out_buf, struct zfcp_hba_dbf_record_qdio *rec)
{
	int len = 0;

	len += zfcp_dbf_view(out_buf + len, "status", "0x%08x", rec->status);
	len += zfcp_dbf_view(out_buf + len, "qdio_error", "0x%08x",
			     rec->qdio_error);
	len += zfcp_dbf_view(out_buf + len, "siga_error", "0x%08x",
			     rec->siga_error);
	len += zfcp_dbf_view(out_buf + len, "sbal_index", "0x%02x",
			     rec->sbal_index);
	len += zfcp_dbf_view(out_buf + len, "sbal_count", "0x%02x",
			     rec->sbal_count);

	return len;
}

static int
zfcp_hba_dbf_view_format(debug_info_t * id, struct debug_view *view,
			 char *out_buf, const char *in_buf)
{
	struct zfcp_hba_dbf_record *rec = (struct zfcp_hba_dbf_record *)in_buf;
	int len = 0;

	if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
		return 0;

	len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
	if (isalpha(rec->tag2[0]))
		len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
	if (strncmp(rec->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
		len += zfcp_hba_dbf_view_response(out_buf + len,
						  &rec->type.response);
	else if (strncmp(rec->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
		len += zfcp_hba_dbf_view_status(out_buf + len,
						&rec->type.status);
	else if (strncmp(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
		len += zfcp_hba_dbf_view_qdio(out_buf + len, &rec->type.qdio);

	len += sprintf(out_buf + len, "\n");

	return len;
}

static struct debug_view zfcp_hba_dbf_view = {
	"structured",
	NULL,
	&zfcp_dbf_view_header,
	&zfcp_hba_dbf_view_format,
	NULL,
	NULL
};

inline void
_zfcp_san_dbf_event_common_ct(const char *tag, struct zfcp_fsf_req *fsf_req,
			      u32 s_id, u32 d_id, void *buffer, int buflen)
{
	struct zfcp_send_ct *send_ct = (struct zfcp_send_ct *)fsf_req->data;
	struct zfcp_port *port = send_ct->port;
	struct zfcp_adapter *adapter = port->adapter;
	struct ct_hdr *header = (struct ct_hdr *)buffer;
	struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
	struct zfcp_san_dbf_record_ct *ct = &rec->type.ct;
	unsigned long flags;

	spin_lock_irqsave(&adapter->san_dbf_lock, flags);
	memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
	strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
	rec->fsf_reqid = (unsigned long)fsf_req;
	rec->fsf_seqno = fsf_req->seq_no;
	rec->s_id = s_id;
	rec->d_id = d_id;
	if (strncmp(tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
		ct->type.request.cmd_req_code = header->cmd_rsp_code;
		ct->type.request.revision = header->revision;
		ct->type.request.gs_type = header->gs_type;
		ct->type.request.gs_subtype = header->gs_subtype;
		ct->type.request.options = header->options;
		ct->type.request.max_res_size = header->max_res_size;
	} else if (strncmp(tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
		ct->type.response.cmd_rsp_code = header->cmd_rsp_code;
		ct->type.response.revision = header->revision;
		ct->type.response.reason_code = header->reason_code;
		ct->type.response.reason_code_expl = header->reason_code_expl;
		ct->type.response.vendor_unique = header->vendor_unique;
	}
	ct->payload_size =
	    min(buflen - (int)sizeof(struct ct_hdr), ZFCP_DBF_CT_PAYLOAD);
	memcpy(ct->payload, buffer + sizeof(struct ct_hdr), ct->payload_size);
	debug_event(adapter->san_dbf, 3,
		    rec, sizeof(struct zfcp_san_dbf_record));
	spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
}

inline void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
{
	struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
	struct zfcp_port *port = ct->port;
	struct zfcp_adapter *adapter = port->adapter;

	_zfcp_san_dbf_event_common_ct("octc", fsf_req,
				      fc_host_port_id(adapter->scsi_host),
				      port->d_id, zfcp_sg_to_address(ct->req),
				      ct->req->length);
}

inline void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
{
	struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
	struct zfcp_port *port = ct->port;
	struct zfcp_adapter *adapter = port->adapter;

	_zfcp_san_dbf_event_common_ct("rctc", fsf_req, port->d_id,
				      fc_host_port_id(adapter->scsi_host),
				      zfcp_sg_to_address(ct->resp),
				      ct->resp->length);
}

static inline void
_zfcp_san_dbf_event_common_els(const char *tag, int level,
			       struct zfcp_fsf_req *fsf_req, u32 s_id,
			       u32 d_id, u8 ls_code, void *buffer, int buflen)
{
	struct zfcp_adapter *adapter = fsf_req->adapter;
	struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
	struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
	unsigned long flags;
	int offset = 0;

	spin_lock_irqsave(&adapter->san_dbf_lock, flags);
	do {
		memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
		if (offset == 0) {
			strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
			rec->fsf_reqid = (unsigned long)fsf_req;
			rec->fsf_seqno = fsf_req->seq_no;
			rec->s_id = s_id;
			rec->d_id = d_id;
			rec->type.els.ls_code = ls_code;
			buflen = min(buflen, ZFCP_DBF_ELS_MAX_PAYLOAD);
			rec->type.els.payload_size = buflen;
			memcpy(rec->type.els.payload,
			       buffer, min(buflen, ZFCP_DBF_ELS_PAYLOAD));
			offset += min(buflen, ZFCP_DBF_ELS_PAYLOAD);
		} else {
			strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
			dump->total_size = buflen;
			dump->offset = offset;
			dump->size = min(buflen - offset,
					 (int)sizeof(struct zfcp_san_dbf_record)
					 - (int)sizeof(struct zfcp_dbf_dump));
			memcpy(dump->data, buffer + offset, dump->size);
			offset += dump->size;
		}
		debug_event(adapter->san_dbf, level,
			    rec, sizeof(struct zfcp_san_dbf_record));
	} while (offset < buflen);
	spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
}

inline void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
{
	struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;

	_zfcp_san_dbf_event_common_els("oels", 2, fsf_req,
				       fc_host_port_id(els->adapter->scsi_host),
				       els->d_id,
				       *(u8 *) zfcp_sg_to_address(els->req),
				       zfcp_sg_to_address(els->req),
				       els->req->length);
}

inline void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
{
	struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;

	_zfcp_san_dbf_event_common_els("rels", 2, fsf_req, els->d_id,
				       fc_host_port_id(els->adapter->scsi_host),
				       *(u8 *) zfcp_sg_to_address(els->req),
				       zfcp_sg_to_address(els->resp),
				       els->resp->length);
}

inline void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
{
	struct zfcp_adapter *adapter = fsf_req->adapter;
	struct fsf_status_read_buffer *status_buffer =
	    (struct fsf_status_read_buffer *)fsf_req->data;
	int length = (int)status_buffer->length -
	    (int)((void *)&status_buffer->payload - (void *)status_buffer);

	_zfcp_san_dbf_event_common_els("iels", 1, fsf_req, status_buffer->d_id,
				       fc_host_port_id(adapter->scsi_host),
				       *(u8 *) status_buffer->payload,
				       (void *)status_buffer->payload, length);
}

static int
zfcp_san_dbf_view_format(debug_info_t * id, struct debug_view *view,
			 char *out_buf, const char *in_buf)
{
	struct zfcp_san_dbf_record *rec = (struct zfcp_san_dbf_record *)in_buf;
	char *buffer = NULL;
	int buflen = 0, total = 0;
	int len = 0;

	if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
		return 0;

	len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
	len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
			     rec->fsf_reqid);
	len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
			     rec->fsf_seqno);
	len += zfcp_dbf_view(out_buf + len, "s_id", "0x%06x", rec->s_id);
	len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x", rec->d_id);

	if (strncmp(rec->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
		len += zfcp_dbf_view(out_buf + len, "cmd_req_code", "0x%04x",
				     rec->type.ct.type.request.cmd_req_code);
		len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
				     rec->type.ct.type.request.revision);
		len += zfcp_dbf_view(out_buf + len, "gs_type", "0x%02x",
				     rec->type.ct.type.request.gs_type);
		len += zfcp_dbf_view(out_buf + len, "gs_subtype", "0x%02x",
				     rec->type.ct.type.request.gs_subtype);
		len += zfcp_dbf_view(out_buf + len, "options", "0x%02x",
				     rec->type.ct.type.request.options);
		len += zfcp_dbf_view(out_buf + len, "max_res_size", "0x%04x",
				     rec->type.ct.type.request.max_res_size);
		total = rec->type.ct.payload_size;
		buffer = rec->type.ct.payload;
		buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
	} else if (strncmp(rec->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
		len += zfcp_dbf_view(out_buf + len, "cmd_rsp_code", "0x%04x",
				     rec->type.ct.type.response.cmd_rsp_code);
		len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
				     rec->type.ct.type.response.revision);
		len += zfcp_dbf_view(out_buf + len, "reason_code", "0x%02x",
				     rec->type.ct.type.response.reason_code);
		len +=
		    zfcp_dbf_view(out_buf + len, "reason_code_expl", "0x%02x",
				  rec->type.ct.type.response.reason_code_expl);
		len +=
		    zfcp_dbf_view(out_buf + len, "vendor_unique", "0x%02x",
				  rec->type.ct.type.response.vendor_unique);
		total = rec->type.ct.payload_size;
		buffer = rec->type.ct.payload;
		buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
	} else if (strncmp(rec->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
		   strncmp(rec->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
		   strncmp(rec->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
		len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
				     rec->type.els.ls_code);
		total = rec->type.els.payload_size;
		buffer = rec->type.els.payload;
		buflen = min(total, ZFCP_DBF_ELS_PAYLOAD);
	}

	len += zfcp_dbf_view_dump(out_buf + len, "payload",
				  buffer, buflen, 0, total);

	if (buflen == total)
		len += sprintf(out_buf + len, "\n");

	return len;
}

static struct debug_view zfcp_san_dbf_view = {
	"structured",
	NULL,
	&zfcp_dbf_view_header,
	&zfcp_san_dbf_view_format,
	NULL,
	NULL
};

static inline void
_zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level,
			    struct zfcp_adapter *adapter,
			    struct scsi_cmnd *scsi_cmnd,
			    struct zfcp_fsf_req *fsf_req,
			    unsigned long old_req_id)
{
	struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
	struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
	unsigned long flags;
	struct fcp_rsp_iu *fcp_rsp;
	char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
	int offset = 0, buflen = 0;

	spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
	do {
		memset(rec, 0, sizeof(struct zfcp_scsi_dbf_record));
		if (offset == 0) {
			strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
			strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
			if (scsi_cmnd != NULL) {
				if (scsi_cmnd->device) {
					rec->scsi_id = scsi_cmnd->device->id;
					rec->scsi_lun = scsi_cmnd->device->lun;
				}
				rec->scsi_result = scsi_cmnd->result;
				rec->scsi_cmnd = (unsigned long)scsi_cmnd;
				rec->scsi_serial = scsi_cmnd->serial_number;
				memcpy(rec->scsi_opcode, &scsi_cmnd->cmnd,
					min((int)scsi_cmnd->cmd_len,
						ZFCP_DBF_SCSI_OPCODE));
				rec->scsi_retries = scsi_cmnd->retries;
				rec->scsi_allowed = scsi_cmnd->allowed;
			}
			if (fsf_req != NULL) {
				fcp_rsp = (struct fcp_rsp_iu *)
				    &(fsf_req->qtcb->bottom.io.fcp_rsp);
				fcp_rsp_info =
				    zfcp_get_fcp_rsp_info_ptr(fcp_rsp);
				fcp_sns_info =
				    zfcp_get_fcp_sns_info_ptr(fcp_rsp);

				rec->type.fcp.rsp_validity =
				    fcp_rsp->validity.value;
				rec->type.fcp.rsp_scsi_status =
				    fcp_rsp->scsi_status;
				rec->type.fcp.rsp_resid = fcp_rsp->fcp_resid;
				if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
					rec->type.fcp.rsp_code =
					    *(fcp_rsp_info + 3);
				if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
					buflen = min((int)fcp_rsp->fcp_sns_len,
						     ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
					rec->type.fcp.sns_info_len = buflen;
					memcpy(rec->type.fcp.sns_info,
					       fcp_sns_info,
					       min(buflen,
						   ZFCP_DBF_SCSI_FCP_SNS_INFO));
					offset += min(buflen,
						      ZFCP_DBF_SCSI_FCP_SNS_INFO);
				}

				rec->fsf_reqid = (unsigned long)fsf_req;
				rec->fsf_seqno = fsf_req->seq_no;
				rec->fsf_issued = fsf_req->issued;
			}
			rec->type.old_fsf_reqid = old_req_id;
		} else {
			strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
			dump->total_size = buflen;
			dump->offset = offset;
			dump->size = min(buflen - offset,
					 (int)sizeof(struct
						     zfcp_scsi_dbf_record) -
					 (int)sizeof(struct zfcp_dbf_dump));
			memcpy(dump->data, fcp_sns_info + offset, dump->size);
			offset += dump->size;
		}
		debug_event(adapter->scsi_dbf, level,
			    rec, sizeof(struct zfcp_scsi_dbf_record));
	} while (offset < buflen);
	spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
}

inline void
zfcp_scsi_dbf_event_result(const char *tag, int level,
			   struct zfcp_adapter *adapter,
			   struct scsi_cmnd *scsi_cmnd,
			   struct zfcp_fsf_req *fsf_req)
{
	_zfcp_scsi_dbf_event_common("rslt", tag, level,
			adapter, scsi_cmnd, fsf_req, 0);
}

inline void
zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
			  struct scsi_cmnd *scsi_cmnd,
			  struct zfcp_fsf_req *new_fsf_req,
			  unsigned long old_req_id)
{
	_zfcp_scsi_dbf_event_common("abrt", tag, 1,
			adapter, scsi_cmnd, new_fsf_req, old_req_id);
}

inline void
zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag, struct zfcp_unit *unit,
			     struct scsi_cmnd *scsi_cmnd)
{
	struct zfcp_adapter *adapter = unit->port->adapter;

	_zfcp_scsi_dbf_event_common(flag == FCP_TARGET_RESET ? "trst" : "lrst",
			tag, 1, adapter, scsi_cmnd, NULL, 0);
}

static int
zfcp_scsi_dbf_view_format(debug_info_t * id, struct debug_view *view,
			  char *out_buf, const char *in_buf)
{
	struct zfcp_scsi_dbf_record *rec =
	    (struct zfcp_scsi_dbf_record *)in_buf;
	int len = 0;

	if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
		return 0;

	len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
	len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
	len += zfcp_dbf_view(out_buf + len, "scsi_id", "0x%08x", rec->scsi_id);
	len += zfcp_dbf_view(out_buf + len, "scsi_lun", "0x%08x",
			     rec->scsi_lun);
	len += zfcp_dbf_view(out_buf + len, "scsi_result", "0x%08x",
			     rec->scsi_result);
	len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
			     rec->scsi_cmnd);
	len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
			     rec->scsi_serial);
	len += zfcp_dbf_view_dump(out_buf + len, "scsi_opcode",
				  rec->scsi_opcode,
				  ZFCP_DBF_SCSI_OPCODE,
				  0, ZFCP_DBF_SCSI_OPCODE);
	len += zfcp_dbf_view(out_buf + len, "scsi_retries", "0x%02x",
			     rec->scsi_retries);
	len += zfcp_dbf_view(out_buf + len, "scsi_allowed", "0x%02x",
			     rec->scsi_allowed);
	if (strncmp(rec->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0) {
		len += zfcp_dbf_view(out_buf + len, "old_fsf_reqid", "0x%0Lx",
				     rec->type.old_fsf_reqid);
	}
	len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
			     rec->fsf_reqid);
	len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
			     rec->fsf_seqno);
	len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
	if (strncmp(rec->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
		len +=
		    zfcp_dbf_view(out_buf + len, "fcp_rsp_validity", "0x%02x",
				  rec->type.fcp.rsp_validity);
		len +=
		    zfcp_dbf_view(out_buf + len, "fcp_rsp_scsi_status",
				  "0x%02x", rec->type.fcp.rsp_scsi_status);
		len +=
		    zfcp_dbf_view(out_buf + len, "fcp_rsp_resid", "0x%08x",
				  rec->type.fcp.rsp_resid);
		len +=
		    zfcp_dbf_view(out_buf + len, "fcp_rsp_code", "0x%08x",
				  rec->type.fcp.rsp_code);
		len +=
		    zfcp_dbf_view(out_buf + len, "fcp_sns_info_len", "0x%08x",
				  rec->type.fcp.sns_info_len);
		len +=
		    zfcp_dbf_view_dump(out_buf + len, "fcp_sns_info",
				       rec->type.fcp.sns_info,
				       min((int)rec->type.fcp.sns_info_len,
					   ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
				       rec->type.fcp.sns_info_len);
	}

	len += sprintf(out_buf + len, "\n");

	return len;
}

static struct debug_view zfcp_scsi_dbf_view = {
	"structured",
	NULL,
	&zfcp_dbf_view_header,
	&zfcp_scsi_dbf_view_format,
	NULL,
	NULL
};

/**
 * zfcp_adapter_debug_register - registers debug feature for an adapter
 * @adapter: pointer to adapter for which debug features should be registered
 * return: -ENOMEM on error, 0 otherwise
 */
int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
{
	char dbf_name[DEBUG_MAX_NAME_LEN];

	/* debug feature area which records recovery activity */
	sprintf(dbf_name, "zfcp_%s_erp", zfcp_get_busid_by_adapter(adapter));
	adapter->erp_dbf = debug_register(dbf_name, dbfsize, 2,
					  sizeof(struct zfcp_erp_dbf_record));
	if (!adapter->erp_dbf)
		goto failed;
	debug_register_view(adapter->erp_dbf, &debug_hex_ascii_view);
	debug_set_level(adapter->erp_dbf, 3);

	/* debug feature area which records HBA (FSF and QDIO) conditions */
	sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter));
	adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
					  sizeof(struct zfcp_hba_dbf_record));
	if (!adapter->hba_dbf)
		goto failed;
	debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
	debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
	debug_set_level(adapter->hba_dbf, 3);

	/* debug feature area which records SAN command failures and recovery */
	sprintf(dbf_name, "zfcp_%s_san", zfcp_get_busid_by_adapter(adapter));
	adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
					  sizeof(struct zfcp_san_dbf_record));
	if (!adapter->san_dbf)
		goto failed;
	debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
	debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
	debug_set_level(adapter->san_dbf, 6);

	/* debug feature area which records SCSI command failures and recovery */
	sprintf(dbf_name, "zfcp_%s_scsi", zfcp_get_busid_by_adapter(adapter));
	adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
					   sizeof(struct zfcp_scsi_dbf_record));
	if (!adapter->scsi_dbf)
		goto failed;
	debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
	debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
	debug_set_level(adapter->scsi_dbf, 3);

	return 0;

 failed:
	zfcp_adapter_debug_unregister(adapter);

	return -ENOMEM;
}

/**
 * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
 * @adapter: pointer to adapter for which debug features should be unregistered
 */
void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
{
	debug_unregister(adapter->scsi_dbf);
	debug_unregister(adapter->san_dbf);
	debug_unregister(adapter->hba_dbf);
	debug_unregister(adapter->erp_dbf);
	adapter->scsi_dbf = NULL;
	adapter->san_dbf = NULL;
	adapter->hba_dbf = NULL;
	adapter->erp_dbf = NULL;
}

#undef ZFCP_LOG_AREA
OpenPOWER on IntegriCloud