xref: /openbmc/linux/drivers/s390/scsi/zfcp_dbf.c (revision 4ef679e6caf1261b6380a610a705a90d7e2738c6)
1 /*
2  *
3  * linux/drivers/s390/scsi/zfcp_dbf.c
4  *
5  * FCP adapter driver for IBM eServer zSeries
6  *
7  * Debugging facilities
8  *
9  * (C) Copyright IBM Corp. 2005
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License as published by
13  * the Free Software Foundation; either version 2, or (at your option)
14  * any later version.
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19  * GNU General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public License
22  * along with this program; if not, write to the Free Software
23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24  */
25 
26 #define ZFCP_DBF_REVISION "$Revision$"
27 
28 #include <asm/debug.h>
29 #include <linux/ctype.h>
30 #include "zfcp_ext.h"
31 
32 static u32 dbfsize = 4;
33 
34 module_param(dbfsize, uint, 0400);
35 MODULE_PARM_DESC(dbfsize,
36 		 "number of pages for each debug feature area (default 4)");
37 
38 #define ZFCP_LOG_AREA			ZFCP_LOG_AREA_OTHER
39 
40 static inline int
41 zfcp_dbf_stck(char *out_buf, const char *label, unsigned long long stck)
42 {
43 	unsigned long long sec;
44 	struct timespec xtime;
45 	int len = 0;
46 
47 	stck -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
48 	sec = stck >> 12;
49 	do_div(sec, 1000000);
50 	xtime.tv_sec = sec;
51 	stck -= (sec * 1000000) << 12;
52 	xtime.tv_nsec = ((stck * 1000) >> 12);
53 	len += sprintf(out_buf + len, "%-24s%011lu:%06lu\n",
54 		       label, xtime.tv_sec, xtime.tv_nsec);
55 
56 	return len;
57 }
58 
59 static int zfcp_dbf_tag(char *out_buf, const char *label, const char *tag)
60 {
61 	int len = 0, i;
62 
63 	len += sprintf(out_buf + len, "%-24s", label);
64 	for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
65 		len += sprintf(out_buf + len, "%c", tag[i]);
66 	len += sprintf(out_buf + len, "\n");
67 
68 	return len;
69 }
70 
71 static int
72 zfcp_dbf_view(char *out_buf, const char *label, const char *format, ...)
73 {
74 	va_list arg;
75 	int len = 0;
76 
77 	len += sprintf(out_buf + len, "%-24s", label);
78 	va_start(arg, format);
79 	len += vsprintf(out_buf + len, format, arg);
80 	va_end(arg);
81 	len += sprintf(out_buf + len, "\n");
82 
83 	return len;
84 }
85 
86 static int
87 zfcp_dbf_view_dump(char *out_buf, const char *label,
88 		   char *buffer, int buflen, int offset, int total_size)
89 {
90 	int len = 0;
91 
92 	if (offset == 0)
93 		len += sprintf(out_buf + len, "%-24s  ", label);
94 
95 	while (buflen--) {
96 		if (offset > 0) {
97 			if ((offset % 32) == 0)
98 				len += sprintf(out_buf + len, "\n%-24c  ", ' ');
99 			else if ((offset % 4) == 0)
100 				len += sprintf(out_buf + len, " ");
101 		}
102 		len += sprintf(out_buf + len, "%02x", *buffer++);
103 		if (++offset == total_size) {
104 			len += sprintf(out_buf + len, "\n");
105 			break;
106 		}
107 	}
108 
109 	if (total_size == 0)
110 		len += sprintf(out_buf + len, "\n");
111 
112 	return len;
113 }
114 
115 static inline int
116 zfcp_dbf_view_header(debug_info_t * id, struct debug_view *view, int area,
117 		     debug_entry_t * entry, char *out_buf)
118 {
119 	struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
120 	int len = 0;
121 
122 	if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
123 		len += zfcp_dbf_stck(out_buf + len, "timestamp",
124 				     entry->id.stck);
125 		len += zfcp_dbf_view(out_buf + len, "cpu", "%02i",
126 				     entry->id.fields.cpuid);
127 	} else {
128 		len += zfcp_dbf_view_dump(out_buf + len, NULL,
129 					  dump->data,
130 					  dump->size,
131 					  dump->offset, dump->total_size);
132 		if ((dump->offset + dump->size) == dump->total_size)
133 			len += sprintf(out_buf + len, "\n");
134 	}
135 
136 	return len;
137 }
138 
139 inline void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
140 {
141 	struct zfcp_adapter *adapter = fsf_req->adapter;
142 	struct fsf_qtcb *qtcb = fsf_req->qtcb;
143 	union fsf_prot_status_qual *prot_status_qual =
144 	    &qtcb->prefix.prot_status_qual;
145 	union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
146 	struct scsi_cmnd *scsi_cmnd;
147 	struct zfcp_port *port;
148 	struct zfcp_unit *unit;
149 	struct zfcp_send_els *send_els;
150 	struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
151 	struct zfcp_hba_dbf_record_response *response = &rec->type.response;
152 	int level;
153 	unsigned long flags;
154 
155 	spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
156 	memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
157 	strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
158 
159 	if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
160 	    (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
161 		strncpy(rec->tag2, "perr", ZFCP_DBF_TAG_SIZE);
162 		level = 1;
163 	} else if (qtcb->header.fsf_status != FSF_GOOD) {
164 		strncpy(rec->tag2, "ferr", ZFCP_DBF_TAG_SIZE);
165 		level = 1;
166 	} else if ((fsf_req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
167 		   (fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) {
168 		strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE);
169 		level = 4;
170 	} else if ((prot_status_qual->doubleword[0] != 0) ||
171 		   (prot_status_qual->doubleword[1] != 0) ||
172 		   (fsf_status_qual->doubleword[0] != 0) ||
173 		   (fsf_status_qual->doubleword[1] != 0)) {
174 		strncpy(rec->tag2, "qual", ZFCP_DBF_TAG_SIZE);
175 		level = 3;
176 	} else {
177 		strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE);
178 		level = 6;
179 	}
180 
181 	response->fsf_command = fsf_req->fsf_command;
182 	response->fsf_reqid = (unsigned long)fsf_req;
183 	response->fsf_seqno = fsf_req->seq_no;
184 	response->fsf_issued = fsf_req->issued;
185 	response->fsf_prot_status = qtcb->prefix.prot_status;
186 	response->fsf_status = qtcb->header.fsf_status;
187 	memcpy(response->fsf_prot_status_qual,
188 	       prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
189 	memcpy(response->fsf_status_qual,
190 	       fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
191 	response->fsf_req_status = fsf_req->status;
192 	response->sbal_first = fsf_req->sbal_first;
193 	response->sbal_curr = fsf_req->sbal_curr;
194 	response->sbal_last = fsf_req->sbal_last;
195 	response->pool = fsf_req->pool != NULL;
196 	response->erp_action = (unsigned long)fsf_req->erp_action;
197 
198 	switch (fsf_req->fsf_command) {
199 	case FSF_QTCB_FCP_CMND:
200 		if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
201 			break;
202 		scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
203 		if (scsi_cmnd != NULL) {
204 			response->data.send_fcp.scsi_cmnd
205 			    = (unsigned long)scsi_cmnd;
206 			response->data.send_fcp.scsi_serial
207 			    = scsi_cmnd->serial_number;
208 		}
209 		break;
210 
211 	case FSF_QTCB_OPEN_PORT_WITH_DID:
212 	case FSF_QTCB_CLOSE_PORT:
213 	case FSF_QTCB_CLOSE_PHYSICAL_PORT:
214 		port = (struct zfcp_port *)fsf_req->data;
215 		response->data.port.wwpn = port->wwpn;
216 		response->data.port.d_id = port->d_id;
217 		response->data.port.port_handle = qtcb->header.port_handle;
218 		break;
219 
220 	case FSF_QTCB_OPEN_LUN:
221 	case FSF_QTCB_CLOSE_LUN:
222 		unit = (struct zfcp_unit *)fsf_req->data;
223 		port = unit->port;
224 		response->data.unit.wwpn = port->wwpn;
225 		response->data.unit.fcp_lun = unit->fcp_lun;
226 		response->data.unit.port_handle = qtcb->header.port_handle;
227 		response->data.unit.lun_handle = qtcb->header.lun_handle;
228 		break;
229 
230 	case FSF_QTCB_SEND_ELS:
231 		send_els = (struct zfcp_send_els *)fsf_req->data;
232 		response->data.send_els.d_id = qtcb->bottom.support.d_id;
233 		response->data.send_els.ls_code = send_els->ls_code >> 24;
234 		break;
235 
236 	case FSF_QTCB_ABORT_FCP_CMND:
237 	case FSF_QTCB_SEND_GENERIC:
238 	case FSF_QTCB_EXCHANGE_CONFIG_DATA:
239 	case FSF_QTCB_EXCHANGE_PORT_DATA:
240 	case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
241 	case FSF_QTCB_UPLOAD_CONTROL_FILE:
242 		break;
243 	}
244 
245 	debug_event(adapter->hba_dbf, level,
246 		    rec, sizeof(struct zfcp_hba_dbf_record));
247 	spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
248 }
249 
250 inline void
251 zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
252 			     struct fsf_status_read_buffer *status_buffer)
253 {
254 	struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
255 	unsigned long flags;
256 
257 	spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
258 	memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
259 	strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
260 	strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
261 
262 	rec->type.status.failed = adapter->status_read_failed;
263 	if (status_buffer != NULL) {
264 		rec->type.status.status_type = status_buffer->status_type;
265 		rec->type.status.status_subtype = status_buffer->status_subtype;
266 		memcpy(&rec->type.status.queue_designator,
267 		       &status_buffer->queue_designator,
268 		       sizeof(struct fsf_queue_designator));
269 
270 		switch (status_buffer->status_type) {
271 		case FSF_STATUS_READ_SENSE_DATA_AVAIL:
272 			rec->type.status.payload_size =
273 			    ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
274 			break;
275 
276 		case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
277 			rec->type.status.payload_size =
278 			    ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
279 			break;
280 
281 		case FSF_STATUS_READ_LINK_DOWN:
282 			switch (status_buffer->status_subtype) {
283 			case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
284 			case FSF_STATUS_READ_SUB_FDISC_FAILED:
285 				rec->type.status.payload_size =
286 					sizeof(struct fsf_link_down_info);
287 			}
288 			break;
289 
290 		case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
291 			rec->type.status.payload_size =
292 			    ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
293 			break;
294 		}
295 		memcpy(&rec->type.status.payload,
296 		       &status_buffer->payload, rec->type.status.payload_size);
297 	}
298 
299 	debug_event(adapter->hba_dbf, 2,
300 		    rec, sizeof(struct zfcp_hba_dbf_record));
301 	spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
302 }
303 
304 inline void
305 zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter, unsigned int status,
306 			unsigned int qdio_error, unsigned int siga_error,
307 			int sbal_index, int sbal_count)
308 {
309 	struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
310 	unsigned long flags;
311 
312 	spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
313 	memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
314 	strncpy(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE);
315 	rec->type.qdio.status = status;
316 	rec->type.qdio.qdio_error = qdio_error;
317 	rec->type.qdio.siga_error = siga_error;
318 	rec->type.qdio.sbal_index = sbal_index;
319 	rec->type.qdio.sbal_count = sbal_count;
320 	debug_event(adapter->hba_dbf, 0,
321 		    rec, sizeof(struct zfcp_hba_dbf_record));
322 	spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
323 }
324 
325 static inline int
326 zfcp_hba_dbf_view_response(char *out_buf,
327 			   struct zfcp_hba_dbf_record_response *rec)
328 {
329 	int len = 0;
330 
331 	len += zfcp_dbf_view(out_buf + len, "fsf_command", "0x%08x",
332 			     rec->fsf_command);
333 	len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
334 			     rec->fsf_reqid);
335 	len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
336 			     rec->fsf_seqno);
337 	len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
338 	len += zfcp_dbf_view(out_buf + len, "fsf_prot_status", "0x%08x",
339 			     rec->fsf_prot_status);
340 	len += zfcp_dbf_view(out_buf + len, "fsf_status", "0x%08x",
341 			     rec->fsf_status);
342 	len += zfcp_dbf_view_dump(out_buf + len, "fsf_prot_status_qual",
343 				  rec->fsf_prot_status_qual,
344 				  FSF_PROT_STATUS_QUAL_SIZE,
345 				  0, FSF_PROT_STATUS_QUAL_SIZE);
346 	len += zfcp_dbf_view_dump(out_buf + len, "fsf_status_qual",
347 				  rec->fsf_status_qual,
348 				  FSF_STATUS_QUALIFIER_SIZE,
349 				  0, FSF_STATUS_QUALIFIER_SIZE);
350 	len += zfcp_dbf_view(out_buf + len, "fsf_req_status", "0x%08x",
351 			     rec->fsf_req_status);
352 	len += zfcp_dbf_view(out_buf + len, "sbal_first", "0x%02x",
353 			     rec->sbal_first);
354 	len += zfcp_dbf_view(out_buf + len, "sbal_curr", "0x%02x",
355 			     rec->sbal_curr);
356 	len += zfcp_dbf_view(out_buf + len, "sbal_last", "0x%02x",
357 			     rec->sbal_last);
358 	len += zfcp_dbf_view(out_buf + len, "pool", "0x%02x", rec->pool);
359 
360 	switch (rec->fsf_command) {
361 	case FSF_QTCB_FCP_CMND:
362 		if (rec->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
363 			break;
364 		len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
365 				     rec->data.send_fcp.scsi_cmnd);
366 		len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
367 				     rec->data.send_fcp.scsi_serial);
368 		break;
369 
370 	case FSF_QTCB_OPEN_PORT_WITH_DID:
371 	case FSF_QTCB_CLOSE_PORT:
372 	case FSF_QTCB_CLOSE_PHYSICAL_PORT:
373 		len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
374 				     rec->data.port.wwpn);
375 		len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
376 				     rec->data.port.d_id);
377 		len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
378 				     rec->data.port.port_handle);
379 		break;
380 
381 	case FSF_QTCB_OPEN_LUN:
382 	case FSF_QTCB_CLOSE_LUN:
383 		len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
384 				     rec->data.unit.wwpn);
385 		len += zfcp_dbf_view(out_buf + len, "fcp_lun", "0x%016Lx",
386 				     rec->data.unit.fcp_lun);
387 		len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
388 				     rec->data.unit.port_handle);
389 		len += zfcp_dbf_view(out_buf + len, "lun_handle", "0x%08x",
390 				     rec->data.unit.lun_handle);
391 		break;
392 
393 	case FSF_QTCB_SEND_ELS:
394 		len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
395 				     rec->data.send_els.d_id);
396 		len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
397 				     rec->data.send_els.ls_code);
398 		break;
399 
400 	case FSF_QTCB_ABORT_FCP_CMND:
401 	case FSF_QTCB_SEND_GENERIC:
402 	case FSF_QTCB_EXCHANGE_CONFIG_DATA:
403 	case FSF_QTCB_EXCHANGE_PORT_DATA:
404 	case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
405 	case FSF_QTCB_UPLOAD_CONTROL_FILE:
406 		break;
407 	}
408 
409 	return len;
410 }
411 
412 static inline int
413 zfcp_hba_dbf_view_status(char *out_buf, struct zfcp_hba_dbf_record_status *rec)
414 {
415 	int len = 0;
416 
417 	len += zfcp_dbf_view(out_buf + len, "failed", "0x%02x", rec->failed);
418 	len += zfcp_dbf_view(out_buf + len, "status_type", "0x%08x",
419 			     rec->status_type);
420 	len += zfcp_dbf_view(out_buf + len, "status_subtype", "0x%08x",
421 			     rec->status_subtype);
422 	len += zfcp_dbf_view_dump(out_buf + len, "queue_designator",
423 				  (char *)&rec->queue_designator,
424 				  sizeof(struct fsf_queue_designator),
425 				  0, sizeof(struct fsf_queue_designator));
426 	len += zfcp_dbf_view_dump(out_buf + len, "payload",
427 				  (char *)&rec->payload,
428 				  rec->payload_size, 0, rec->payload_size);
429 
430 	return len;
431 }
432 
433 static inline int
434 zfcp_hba_dbf_view_qdio(char *out_buf, struct zfcp_hba_dbf_record_qdio *rec)
435 {
436 	int len = 0;
437 
438 	len += zfcp_dbf_view(out_buf + len, "status", "0x%08x", rec->status);
439 	len += zfcp_dbf_view(out_buf + len, "qdio_error", "0x%08x",
440 			     rec->qdio_error);
441 	len += zfcp_dbf_view(out_buf + len, "siga_error", "0x%08x",
442 			     rec->siga_error);
443 	len += zfcp_dbf_view(out_buf + len, "sbal_index", "0x%02x",
444 			     rec->sbal_index);
445 	len += zfcp_dbf_view(out_buf + len, "sbal_count", "0x%02x",
446 			     rec->sbal_count);
447 
448 	return len;
449 }
450 
451 static int
452 zfcp_hba_dbf_view_format(debug_info_t * id, struct debug_view *view,
453 			 char *out_buf, const char *in_buf)
454 {
455 	struct zfcp_hba_dbf_record *rec = (struct zfcp_hba_dbf_record *)in_buf;
456 	int len = 0;
457 
458 	if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
459 		return 0;
460 
461 	len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
462 	if (isalpha(rec->tag2[0]))
463 		len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
464 	if (strncmp(rec->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
465 		len += zfcp_hba_dbf_view_response(out_buf + len,
466 						  &rec->type.response);
467 	else if (strncmp(rec->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
468 		len += zfcp_hba_dbf_view_status(out_buf + len,
469 						&rec->type.status);
470 	else if (strncmp(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
471 		len += zfcp_hba_dbf_view_qdio(out_buf + len, &rec->type.qdio);
472 
473 	len += sprintf(out_buf + len, "\n");
474 
475 	return len;
476 }
477 
478 struct debug_view zfcp_hba_dbf_view = {
479 	"structured",
480 	NULL,
481 	&zfcp_dbf_view_header,
482 	&zfcp_hba_dbf_view_format,
483 	NULL,
484 	NULL
485 };
486 
487 inline void
488 _zfcp_san_dbf_event_common_ct(const char *tag, struct zfcp_fsf_req *fsf_req,
489 			      u32 s_id, u32 d_id, void *buffer, int buflen)
490 {
491 	struct zfcp_send_ct *send_ct = (struct zfcp_send_ct *)fsf_req->data;
492 	struct zfcp_port *port = send_ct->port;
493 	struct zfcp_adapter *adapter = port->adapter;
494 	struct ct_hdr *header = (struct ct_hdr *)buffer;
495 	struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
496 	struct zfcp_san_dbf_record_ct *ct = &rec->type.ct;
497 	unsigned long flags;
498 
499 	spin_lock_irqsave(&adapter->san_dbf_lock, flags);
500 	memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
501 	strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
502 	rec->fsf_reqid = (unsigned long)fsf_req;
503 	rec->fsf_seqno = fsf_req->seq_no;
504 	rec->s_id = s_id;
505 	rec->d_id = d_id;
506 	if (strncmp(tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
507 		ct->type.request.cmd_req_code = header->cmd_rsp_code;
508 		ct->type.request.revision = header->revision;
509 		ct->type.request.gs_type = header->gs_type;
510 		ct->type.request.gs_subtype = header->gs_subtype;
511 		ct->type.request.options = header->options;
512 		ct->type.request.max_res_size = header->max_res_size;
513 	} else if (strncmp(tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
514 		ct->type.response.cmd_rsp_code = header->cmd_rsp_code;
515 		ct->type.response.revision = header->revision;
516 		ct->type.response.reason_code = header->reason_code;
517 		ct->type.response.reason_code_expl = header->reason_code_expl;
518 		ct->type.response.vendor_unique = header->vendor_unique;
519 	}
520 	ct->payload_size =
521 	    min(buflen - (int)sizeof(struct ct_hdr), ZFCP_DBF_CT_PAYLOAD);
522 	memcpy(ct->payload, buffer + sizeof(struct ct_hdr), ct->payload_size);
523 	debug_event(adapter->san_dbf, 3,
524 		    rec, sizeof(struct zfcp_san_dbf_record));
525 	spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
526 }
527 
528 inline void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
529 {
530 	struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
531 	struct zfcp_port *port = ct->port;
532 	struct zfcp_adapter *adapter = port->adapter;
533 
534 	_zfcp_san_dbf_event_common_ct("octc", fsf_req,
535 				      fc_host_port_id(adapter->scsi_host),
536 				      port->d_id, zfcp_sg_to_address(ct->req),
537 				      ct->req->length);
538 }
539 
540 inline void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
541 {
542 	struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
543 	struct zfcp_port *port = ct->port;
544 	struct zfcp_adapter *adapter = port->adapter;
545 
546 	_zfcp_san_dbf_event_common_ct("rctc", fsf_req, port->d_id,
547 				      fc_host_port_id(adapter->scsi_host),
548 				      zfcp_sg_to_address(ct->resp),
549 				      ct->resp->length);
550 }
551 
552 static inline void
553 _zfcp_san_dbf_event_common_els(const char *tag, int level,
554 			       struct zfcp_fsf_req *fsf_req, u32 s_id,
555 			       u32 d_id, u8 ls_code, void *buffer, int buflen)
556 {
557 	struct zfcp_adapter *adapter = fsf_req->adapter;
558 	struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
559 	struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
560 	unsigned long flags;
561 	int offset = 0;
562 
563 	spin_lock_irqsave(&adapter->san_dbf_lock, flags);
564 	do {
565 		memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
566 		if (offset == 0) {
567 			strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
568 			rec->fsf_reqid = (unsigned long)fsf_req;
569 			rec->fsf_seqno = fsf_req->seq_no;
570 			rec->s_id = s_id;
571 			rec->d_id = d_id;
572 			rec->type.els.ls_code = ls_code;
573 			buflen = min(buflen, ZFCP_DBF_ELS_MAX_PAYLOAD);
574 			rec->type.els.payload_size = buflen;
575 			memcpy(rec->type.els.payload,
576 			       buffer, min(buflen, ZFCP_DBF_ELS_PAYLOAD));
577 			offset += min(buflen, ZFCP_DBF_ELS_PAYLOAD);
578 		} else {
579 			strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
580 			dump->total_size = buflen;
581 			dump->offset = offset;
582 			dump->size = min(buflen - offset,
583 					 (int)sizeof(struct zfcp_san_dbf_record)
584 					 - (int)sizeof(struct zfcp_dbf_dump));
585 			memcpy(dump->data, buffer + offset, dump->size);
586 			offset += dump->size;
587 		}
588 		debug_event(adapter->san_dbf, level,
589 			    rec, sizeof(struct zfcp_san_dbf_record));
590 	} while (offset < buflen);
591 	spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
592 }
593 
594 inline void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
595 {
596 	struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
597 
598 	_zfcp_san_dbf_event_common_els("oels", 2, fsf_req,
599 				       fc_host_port_id(els->adapter->scsi_host),
600 				       els->d_id,
601 				       *(u8 *) zfcp_sg_to_address(els->req),
602 				       zfcp_sg_to_address(els->req),
603 				       els->req->length);
604 }
605 
606 inline void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
607 {
608 	struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
609 
610 	_zfcp_san_dbf_event_common_els("rels", 2, fsf_req, els->d_id,
611 				       fc_host_port_id(els->adapter->scsi_host),
612 				       *(u8 *) zfcp_sg_to_address(els->req),
613 				       zfcp_sg_to_address(els->resp),
614 				       els->resp->length);
615 }
616 
617 inline void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
618 {
619 	struct zfcp_adapter *adapter = fsf_req->adapter;
620 	struct fsf_status_read_buffer *status_buffer =
621 	    (struct fsf_status_read_buffer *)fsf_req->data;
622 	int length = (int)status_buffer->length -
623 	    (int)((void *)&status_buffer->payload - (void *)status_buffer);
624 
625 	_zfcp_san_dbf_event_common_els("iels", 1, fsf_req, status_buffer->d_id,
626 				       fc_host_port_id(adapter->scsi_host),
627 				       *(u8 *) status_buffer->payload,
628 				       (void *)status_buffer->payload, length);
629 }
630 
631 static int
632 zfcp_san_dbf_view_format(debug_info_t * id, struct debug_view *view,
633 			 char *out_buf, const char *in_buf)
634 {
635 	struct zfcp_san_dbf_record *rec = (struct zfcp_san_dbf_record *)in_buf;
636 	char *buffer = NULL;
637 	int buflen = 0, total = 0;
638 	int len = 0;
639 
640 	if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
641 		return 0;
642 
643 	len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
644 	len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
645 			     rec->fsf_reqid);
646 	len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
647 			     rec->fsf_seqno);
648 	len += zfcp_dbf_view(out_buf + len, "s_id", "0x%06x", rec->s_id);
649 	len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x", rec->d_id);
650 
651 	if (strncmp(rec->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
652 		len += zfcp_dbf_view(out_buf + len, "cmd_req_code", "0x%04x",
653 				     rec->type.ct.type.request.cmd_req_code);
654 		len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
655 				     rec->type.ct.type.request.revision);
656 		len += zfcp_dbf_view(out_buf + len, "gs_type", "0x%02x",
657 				     rec->type.ct.type.request.gs_type);
658 		len += zfcp_dbf_view(out_buf + len, "gs_subtype", "0x%02x",
659 				     rec->type.ct.type.request.gs_subtype);
660 		len += zfcp_dbf_view(out_buf + len, "options", "0x%02x",
661 				     rec->type.ct.type.request.options);
662 		len += zfcp_dbf_view(out_buf + len, "max_res_size", "0x%04x",
663 				     rec->type.ct.type.request.max_res_size);
664 		total = rec->type.ct.payload_size;
665 		buffer = rec->type.ct.payload;
666 		buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
667 	} else if (strncmp(rec->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
668 		len += zfcp_dbf_view(out_buf + len, "cmd_rsp_code", "0x%04x",
669 				     rec->type.ct.type.response.cmd_rsp_code);
670 		len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
671 				     rec->type.ct.type.response.revision);
672 		len += zfcp_dbf_view(out_buf + len, "reason_code", "0x%02x",
673 				     rec->type.ct.type.response.reason_code);
674 		len +=
675 		    zfcp_dbf_view(out_buf + len, "reason_code_expl", "0x%02x",
676 				  rec->type.ct.type.response.reason_code_expl);
677 		len +=
678 		    zfcp_dbf_view(out_buf + len, "vendor_unique", "0x%02x",
679 				  rec->type.ct.type.response.vendor_unique);
680 		total = rec->type.ct.payload_size;
681 		buffer = rec->type.ct.payload;
682 		buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
683 	} else if (strncmp(rec->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
684 		   strncmp(rec->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
685 		   strncmp(rec->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
686 		len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
687 				     rec->type.els.ls_code);
688 		total = rec->type.els.payload_size;
689 		buffer = rec->type.els.payload;
690 		buflen = min(total, ZFCP_DBF_ELS_PAYLOAD);
691 	}
692 
693 	len += zfcp_dbf_view_dump(out_buf + len, "payload",
694 				  buffer, buflen, 0, total);
695 
696 	if (buflen == total)
697 		len += sprintf(out_buf + len, "\n");
698 
699 	return len;
700 }
701 
702 struct debug_view zfcp_san_dbf_view = {
703 	"structured",
704 	NULL,
705 	&zfcp_dbf_view_header,
706 	&zfcp_san_dbf_view_format,
707 	NULL,
708 	NULL
709 };
710 
711 static inline void
712 _zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level,
713 			    struct zfcp_adapter *adapter,
714 			    struct scsi_cmnd *scsi_cmnd,
715 			    struct zfcp_fsf_req *new_fsf_req)
716 {
717 	struct zfcp_fsf_req *fsf_req =
718 	    (struct zfcp_fsf_req *)scsi_cmnd->host_scribble;
719 	struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
720 	struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
721 	unsigned long flags;
722 	struct fcp_rsp_iu *fcp_rsp;
723 	char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
724 	int offset = 0, buflen = 0;
725 
726 	spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
727 	do {
728 		memset(rec, 0, sizeof(struct zfcp_scsi_dbf_record));
729 		if (offset == 0) {
730 			strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
731 			strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
732 			if (scsi_cmnd->device) {
733 				rec->scsi_id = scsi_cmnd->device->id;
734 				rec->scsi_lun = scsi_cmnd->device->lun;
735 			}
736 			rec->scsi_result = scsi_cmnd->result;
737 			rec->scsi_cmnd = (unsigned long)scsi_cmnd;
738 			rec->scsi_serial = scsi_cmnd->serial_number;
739 			memcpy(rec->scsi_opcode,
740 			       &scsi_cmnd->cmnd,
741 			       min((int)scsi_cmnd->cmd_len,
742 				   ZFCP_DBF_SCSI_OPCODE));
743 			rec->scsi_retries = scsi_cmnd->retries;
744 			rec->scsi_allowed = scsi_cmnd->allowed;
745 			if (fsf_req != NULL) {
746 				fcp_rsp = (struct fcp_rsp_iu *)
747 				    &(fsf_req->qtcb->bottom.io.fcp_rsp);
748 				fcp_rsp_info =
749 				    zfcp_get_fcp_rsp_info_ptr(fcp_rsp);
750 				fcp_sns_info =
751 				    zfcp_get_fcp_sns_info_ptr(fcp_rsp);
752 
753 				rec->type.fcp.rsp_validity =
754 				    fcp_rsp->validity.value;
755 				rec->type.fcp.rsp_scsi_status =
756 				    fcp_rsp->scsi_status;
757 				rec->type.fcp.rsp_resid = fcp_rsp->fcp_resid;
758 				if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
759 					rec->type.fcp.rsp_code =
760 					    *(fcp_rsp_info + 3);
761 				if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
762 					buflen = min((int)fcp_rsp->fcp_sns_len,
763 						     ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
764 					rec->type.fcp.sns_info_len = buflen;
765 					memcpy(rec->type.fcp.sns_info,
766 					       fcp_sns_info,
767 					       min(buflen,
768 						   ZFCP_DBF_SCSI_FCP_SNS_INFO));
769 					offset += min(buflen,
770 						      ZFCP_DBF_SCSI_FCP_SNS_INFO);
771 				}
772 
773 				rec->fsf_reqid = (unsigned long)fsf_req;
774 				rec->fsf_seqno = fsf_req->seq_no;
775 				rec->fsf_issued = fsf_req->issued;
776 			}
777 			if (new_fsf_req != NULL) {
778 				rec->type.new_fsf_req.fsf_reqid =
779 				    (unsigned long)
780 				    new_fsf_req;
781 				rec->type.new_fsf_req.fsf_seqno =
782 				    new_fsf_req->seq_no;
783 				rec->type.new_fsf_req.fsf_issued =
784 				    new_fsf_req->issued;
785 			}
786 		} else {
787 			strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
788 			dump->total_size = buflen;
789 			dump->offset = offset;
790 			dump->size = min(buflen - offset,
791 					 (int)sizeof(struct
792 						     zfcp_scsi_dbf_record) -
793 					 (int)sizeof(struct zfcp_dbf_dump));
794 			memcpy(dump->data, fcp_sns_info + offset, dump->size);
795 			offset += dump->size;
796 		}
797 		debug_event(adapter->scsi_dbf, level,
798 			    rec, sizeof(struct zfcp_scsi_dbf_record));
799 	} while (offset < buflen);
800 	spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
801 }
802 
803 inline void
804 zfcp_scsi_dbf_event_result(const char *tag, int level,
805 			   struct zfcp_adapter *adapter,
806 			   struct scsi_cmnd *scsi_cmnd)
807 {
808 	_zfcp_scsi_dbf_event_common("rslt",
809 				    tag, level, adapter, scsi_cmnd, NULL);
810 }
811 
812 inline void
813 zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
814 			  struct scsi_cmnd *scsi_cmnd,
815 			  struct zfcp_fsf_req *new_fsf_req)
816 {
817 	_zfcp_scsi_dbf_event_common("abrt",
818 				    tag, 1, adapter, scsi_cmnd, new_fsf_req);
819 }
820 
821 inline void
822 zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag, struct zfcp_unit *unit,
823 			     struct scsi_cmnd *scsi_cmnd)
824 {
825 	struct zfcp_adapter *adapter = unit->port->adapter;
826 
827 	_zfcp_scsi_dbf_event_common(flag == FCP_TARGET_RESET ? "trst" : "lrst",
828 				    tag, 1, adapter, scsi_cmnd, NULL);
829 }
830 
831 static int
832 zfcp_scsi_dbf_view_format(debug_info_t * id, struct debug_view *view,
833 			  char *out_buf, const char *in_buf)
834 {
835 	struct zfcp_scsi_dbf_record *rec =
836 	    (struct zfcp_scsi_dbf_record *)in_buf;
837 	int len = 0;
838 
839 	if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
840 		return 0;
841 
842 	len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
843 	len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
844 	len += zfcp_dbf_view(out_buf + len, "scsi_id", "0x%08x", rec->scsi_id);
845 	len += zfcp_dbf_view(out_buf + len, "scsi_lun", "0x%08x",
846 			     rec->scsi_lun);
847 	len += zfcp_dbf_view(out_buf + len, "scsi_result", "0x%08x",
848 			     rec->scsi_result);
849 	len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
850 			     rec->scsi_cmnd);
851 	len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
852 			     rec->scsi_serial);
853 	len += zfcp_dbf_view_dump(out_buf + len, "scsi_opcode",
854 				  rec->scsi_opcode,
855 				  ZFCP_DBF_SCSI_OPCODE,
856 				  0, ZFCP_DBF_SCSI_OPCODE);
857 	len += zfcp_dbf_view(out_buf + len, "scsi_retries", "0x%02x",
858 			     rec->scsi_retries);
859 	len += zfcp_dbf_view(out_buf + len, "scsi_allowed", "0x%02x",
860 			     rec->scsi_allowed);
861 	len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
862 			     rec->fsf_reqid);
863 	len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
864 			     rec->fsf_seqno);
865 	len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
866 	if (strncmp(rec->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
867 		len +=
868 		    zfcp_dbf_view(out_buf + len, "fcp_rsp_validity", "0x%02x",
869 				  rec->type.fcp.rsp_validity);
870 		len +=
871 		    zfcp_dbf_view(out_buf + len, "fcp_rsp_scsi_status",
872 				  "0x%02x", rec->type.fcp.rsp_scsi_status);
873 		len +=
874 		    zfcp_dbf_view(out_buf + len, "fcp_rsp_resid", "0x%08x",
875 				  rec->type.fcp.rsp_resid);
876 		len +=
877 		    zfcp_dbf_view(out_buf + len, "fcp_rsp_code", "0x%08x",
878 				  rec->type.fcp.rsp_code);
879 		len +=
880 		    zfcp_dbf_view(out_buf + len, "fcp_sns_info_len", "0x%08x",
881 				  rec->type.fcp.sns_info_len);
882 		len +=
883 		    zfcp_dbf_view_dump(out_buf + len, "fcp_sns_info",
884 				       rec->type.fcp.sns_info,
885 				       min((int)rec->type.fcp.sns_info_len,
886 					   ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
887 				       rec->type.fcp.sns_info_len);
888 	} else if (strncmp(rec->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0) {
889 		len += zfcp_dbf_view(out_buf + len, "fsf_reqid_abort", "0x%0Lx",
890 				     rec->type.new_fsf_req.fsf_reqid);
891 		len += zfcp_dbf_view(out_buf + len, "fsf_seqno_abort", "0x%08x",
892 				     rec->type.new_fsf_req.fsf_seqno);
893 		len += zfcp_dbf_stck(out_buf + len, "fsf_issued",
894 				     rec->type.new_fsf_req.fsf_issued);
895 	} else if ((strncmp(rec->tag, "trst", ZFCP_DBF_TAG_SIZE) == 0) ||
896 		   (strncmp(rec->tag, "lrst", ZFCP_DBF_TAG_SIZE) == 0)) {
897 		len += zfcp_dbf_view(out_buf + len, "fsf_reqid_reset", "0x%0Lx",
898 				     rec->type.new_fsf_req.fsf_reqid);
899 		len += zfcp_dbf_view(out_buf + len, "fsf_seqno_reset", "0x%08x",
900 				     rec->type.new_fsf_req.fsf_seqno);
901 		len += zfcp_dbf_stck(out_buf + len, "fsf_issued",
902 				     rec->type.new_fsf_req.fsf_issued);
903 	}
904 
905 	len += sprintf(out_buf + len, "\n");
906 
907 	return len;
908 }
909 
910 struct debug_view zfcp_scsi_dbf_view = {
911 	"structured",
912 	NULL,
913 	&zfcp_dbf_view_header,
914 	&zfcp_scsi_dbf_view_format,
915 	NULL,
916 	NULL
917 };
918 
919 /**
920  * zfcp_adapter_debug_register - registers debug feature for an adapter
921  * @adapter: pointer to adapter for which debug features should be registered
922  * return: -ENOMEM on error, 0 otherwise
923  */
924 int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
925 {
926 	char dbf_name[DEBUG_MAX_NAME_LEN];
927 
928 	/* debug feature area which records recovery activity */
929 	sprintf(dbf_name, "zfcp_%s_erp", zfcp_get_busid_by_adapter(adapter));
930 	adapter->erp_dbf = debug_register(dbf_name, dbfsize, 2,
931 					  sizeof(struct zfcp_erp_dbf_record));
932 	if (!adapter->erp_dbf)
933 		goto failed;
934 	debug_register_view(adapter->erp_dbf, &debug_hex_ascii_view);
935 	debug_set_level(adapter->erp_dbf, 3);
936 
937 	/* debug feature area which records HBA (FSF and QDIO) conditions */
938 	sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter));
939 	adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
940 					  sizeof(struct zfcp_hba_dbf_record));
941 	if (!adapter->hba_dbf)
942 		goto failed;
943 	debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
944 	debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
945 	debug_set_level(adapter->hba_dbf, 3);
946 
947 	/* debug feature area which records SAN command failures and recovery */
948 	sprintf(dbf_name, "zfcp_%s_san", zfcp_get_busid_by_adapter(adapter));
949 	adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
950 					  sizeof(struct zfcp_san_dbf_record));
951 	if (!adapter->san_dbf)
952 		goto failed;
953 	debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
954 	debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
955 	debug_set_level(adapter->san_dbf, 6);
956 
957 	/* debug feature area which records SCSI command failures and recovery */
958 	sprintf(dbf_name, "zfcp_%s_scsi", zfcp_get_busid_by_adapter(adapter));
959 	adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
960 					   sizeof(struct zfcp_scsi_dbf_record));
961 	if (!adapter->scsi_dbf)
962 		goto failed;
963 	debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
964 	debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
965 	debug_set_level(adapter->scsi_dbf, 3);
966 
967 	return 0;
968 
969  failed:
970 	zfcp_adapter_debug_unregister(adapter);
971 
972 	return -ENOMEM;
973 }
974 
975 /**
976  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
977  * @adapter: pointer to adapter for which debug features should be unregistered
978  */
979 void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
980 {
981 	debug_unregister(adapter->scsi_dbf);
982 	debug_unregister(adapter->san_dbf);
983 	debug_unregister(adapter->hba_dbf);
984 	debug_unregister(adapter->erp_dbf);
985 	adapter->scsi_dbf = NULL;
986 	adapter->san_dbf = NULL;
987 	adapter->hba_dbf = NULL;
988 	adapter->erp_dbf = NULL;
989 }
990 
991 #undef ZFCP_LOG_AREA
992