2cdd6b28ff7fd1f006663277301f5cbc0e49271a
[linux-2.6.git] / drivers / s390 / scsi / zfcp_dbf.c
1 /*
2  * zfcp device driver
3  *
4  * Debug traces for zfcp.
5  *
6  * Copyright IBM Corporation 2002, 2009
7  */
8
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12 #include <linux/ctype.h>
13 #include <linux/slab.h>
14 #include <asm/debug.h>
15 #include "zfcp_dbf.h"
16 #include "zfcp_ext.h"
17 #include "zfcp_fc.h"
18
19 static u32 dbfsize = 4;
20
21 module_param(dbfsize, uint, 0400);
22 MODULE_PARM_DESC(dbfsize,
23                  "number of pages for each debug feature area (default 4)");
24
25 static void zfcp_dbf_hexdump(debug_info_t *dbf, void *to, int to_len,
26                              int level, char *from, int from_len)
27 {
28         int offset;
29         struct zfcp_dbf_dump *dump = to;
30         int room = to_len - sizeof(*dump);
31
32         for (offset = 0; offset < from_len; offset += dump->size) {
33                 memset(to, 0, to_len);
34                 strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
35                 dump->total_size = from_len;
36                 dump->offset = offset;
37                 dump->size = min(from_len - offset, room);
38                 memcpy(dump->data, from + offset, dump->size);
39                 debug_event(dbf, level, dump, dump->size + sizeof(*dump));
40         }
41 }
42
43 static void zfcp_dbf_tag(char **p, const char *label, const char *tag)
44 {
45         int i;
46
47         *p += sprintf(*p, "%-24s", label);
48         for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
49                 *p += sprintf(*p, "%c", tag[i]);
50         *p += sprintf(*p, "\n");
51 }
52
53 static void zfcp_dbf_outs(char **buf, const char *s1, const char *s2)
54 {
55         *buf += sprintf(*buf, "%-24s%s\n", s1, s2);
56 }
57
58 static void zfcp_dbf_out(char **buf, const char *s, const char *format, ...)
59 {
60         va_list arg;
61
62         *buf += sprintf(*buf, "%-24s", s);
63         va_start(arg, format);
64         *buf += vsprintf(*buf, format, arg);
65         va_end(arg);
66         *buf += sprintf(*buf, "\n");
67 }
68
69 static void zfcp_dbf_outd(char **p, const char *label, char *buffer,
70                           int buflen, int offset, int total_size)
71 {
72         if (!offset)
73                 *p += sprintf(*p, "%-24s  ", label);
74         while (buflen--) {
75                 if (offset > 0) {
76                         if ((offset % 32) == 0)
77                                 *p += sprintf(*p, "\n%-24c  ", ' ');
78                         else if ((offset % 4) == 0)
79                                 *p += sprintf(*p, " ");
80                 }
81                 *p += sprintf(*p, "%02x", *buffer++);
82                 if (++offset == total_size) {
83                         *p += sprintf(*p, "\n");
84                         break;
85                 }
86         }
87         if (!total_size)
88                 *p += sprintf(*p, "\n");
89 }
90
91 static int zfcp_dbf_view_header(debug_info_t *id, struct debug_view *view,
92                                 int area, debug_entry_t *entry, char *out_buf)
93 {
94         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
95         struct timespec t;
96         char *p = out_buf;
97
98         if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
99                 stck_to_timespec(entry->id.stck, &t);
100                 zfcp_dbf_out(&p, "timestamp", "%011lu:%06lu",
101                              t.tv_sec, t.tv_nsec);
102                 zfcp_dbf_out(&p, "cpu", "%02i", entry->id.fields.cpuid);
103         } else  {
104                 zfcp_dbf_outd(&p, "", dump->data, dump->size, dump->offset,
105                               dump->total_size);
106                 if ((dump->offset + dump->size) == dump->total_size)
107                         p += sprintf(p, "\n");
108         }
109         return p - out_buf;
110 }
111
112 void _zfcp_dbf_hba_fsf_response(const char *tag2, int level,
113                                 struct zfcp_fsf_req *fsf_req,
114                                 struct zfcp_dbf *dbf)
115 {
116         struct fsf_qtcb *qtcb = fsf_req->qtcb;
117         union fsf_prot_status_qual *prot_status_qual =
118                                         &qtcb->prefix.prot_status_qual;
119         union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
120         struct scsi_cmnd *scsi_cmnd;
121         struct zfcp_port *port;
122         struct zfcp_unit *unit;
123         struct zfcp_send_els *send_els;
124         struct zfcp_dbf_hba_record *rec = &dbf->hba_buf;
125         struct zfcp_dbf_hba_record_response *response = &rec->u.response;
126         unsigned long flags;
127
128         spin_lock_irqsave(&dbf->hba_lock, flags);
129         memset(rec, 0, sizeof(*rec));
130         strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
131         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
132
133         response->fsf_command = fsf_req->fsf_command;
134         response->fsf_reqid = fsf_req->req_id;
135         response->fsf_seqno = fsf_req->seq_no;
136         response->fsf_issued = fsf_req->issued;
137         response->fsf_prot_status = qtcb->prefix.prot_status;
138         response->fsf_status = qtcb->header.fsf_status;
139         memcpy(response->fsf_prot_status_qual,
140                prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
141         memcpy(response->fsf_status_qual,
142                fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
143         response->fsf_req_status = fsf_req->status;
144         response->sbal_first = fsf_req->qdio_req.sbal_first;
145         response->sbal_last = fsf_req->qdio_req.sbal_last;
146         response->sbal_response = fsf_req->qdio_req.sbal_response;
147         response->pool = fsf_req->pool != NULL;
148         response->erp_action = (unsigned long)fsf_req->erp_action;
149
150         switch (fsf_req->fsf_command) {
151         case FSF_QTCB_FCP_CMND:
152                 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
153                         break;
154                 scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
155                 if (scsi_cmnd) {
156                         response->u.fcp.cmnd = (unsigned long)scsi_cmnd;
157                         response->u.fcp.data_dir =
158                                 qtcb->bottom.io.data_direction;
159                 }
160                 break;
161
162         case FSF_QTCB_OPEN_PORT_WITH_DID:
163         case FSF_QTCB_CLOSE_PORT:
164         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
165                 port = (struct zfcp_port *)fsf_req->data;
166                 response->u.port.wwpn = port->wwpn;
167                 response->u.port.d_id = port->d_id;
168                 response->u.port.port_handle = qtcb->header.port_handle;
169                 break;
170
171         case FSF_QTCB_OPEN_LUN:
172         case FSF_QTCB_CLOSE_LUN:
173                 unit = (struct zfcp_unit *)fsf_req->data;
174                 port = unit->port;
175                 response->u.unit.wwpn = port->wwpn;
176                 response->u.unit.fcp_lun = unit->fcp_lun;
177                 response->u.unit.port_handle = qtcb->header.port_handle;
178                 response->u.unit.lun_handle = qtcb->header.lun_handle;
179                 break;
180
181         case FSF_QTCB_SEND_ELS:
182                 send_els = (struct zfcp_send_els *)fsf_req->data;
183                 response->u.els.d_id = ntoh24(qtcb->bottom.support.d_id);
184                 break;
185
186         case FSF_QTCB_ABORT_FCP_CMND:
187         case FSF_QTCB_SEND_GENERIC:
188         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
189         case FSF_QTCB_EXCHANGE_PORT_DATA:
190         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
191         case FSF_QTCB_UPLOAD_CONTROL_FILE:
192                 break;
193         }
194
195         debug_event(dbf->hba, level, rec, sizeof(*rec));
196
197         /* have fcp channel microcode fixed to use as little as possible */
198         if (fsf_req->fsf_command != FSF_QTCB_FCP_CMND) {
199                 /* adjust length skipping trailing zeros */
200                 char *buf = (char *)qtcb + qtcb->header.log_start;
201                 int len = qtcb->header.log_length;
202                 for (; len && !buf[len - 1]; len--);
203                 zfcp_dbf_hexdump(dbf->hba, rec, sizeof(*rec), level, buf,
204                                  len);
205         }
206
207         spin_unlock_irqrestore(&dbf->hba_lock, flags);
208 }
209
210 void _zfcp_dbf_hba_fsf_unsol(const char *tag, int level, struct zfcp_dbf *dbf,
211                              struct fsf_status_read_buffer *status_buffer)
212 {
213         struct zfcp_dbf_hba_record *rec = &dbf->hba_buf;
214         unsigned long flags;
215
216         spin_lock_irqsave(&dbf->hba_lock, flags);
217         memset(rec, 0, sizeof(*rec));
218         strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
219         strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
220
221         rec->u.status.failed = atomic_read(&dbf->adapter->stat_miss);
222         if (status_buffer != NULL) {
223                 rec->u.status.status_type = status_buffer->status_type;
224                 rec->u.status.status_subtype = status_buffer->status_subtype;
225                 memcpy(&rec->u.status.queue_designator,
226                        &status_buffer->queue_designator,
227                        sizeof(struct fsf_queue_designator));
228
229                 switch (status_buffer->status_type) {
230                 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
231                         rec->u.status.payload_size =
232                             ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
233                         break;
234
235                 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
236                         rec->u.status.payload_size =
237                             ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
238                         break;
239
240                 case FSF_STATUS_READ_LINK_DOWN:
241                         switch (status_buffer->status_subtype) {
242                         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
243                         case FSF_STATUS_READ_SUB_FDISC_FAILED:
244                                 rec->u.status.payload_size =
245                                         sizeof(struct fsf_link_down_info);
246                         }
247                         break;
248
249                 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
250                         rec->u.status.payload_size =
251                             ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
252                         break;
253                 }
254                 memcpy(&rec->u.status.payload,
255                        &status_buffer->payload, rec->u.status.payload_size);
256         }
257
258         debug_event(dbf->hba, level, rec, sizeof(*rec));
259         spin_unlock_irqrestore(&dbf->hba_lock, flags);
260 }
261
262 /**
263  * zfcp_dbf_hba_qdio - trace event for QDIO related failure
264  * @qdio: qdio structure affected by this QDIO related event
265  * @qdio_error: as passed by qdio module
266  * @sbal_index: first buffer with error condition, as passed by qdio module
267  * @sbal_count: number of buffers affected, as passed by qdio module
268  */
269 void zfcp_dbf_hba_qdio(struct zfcp_dbf *dbf, unsigned int qdio_error,
270                        int sbal_index, int sbal_count)
271 {
272         struct zfcp_dbf_hba_record *r = &dbf->hba_buf;
273         unsigned long flags;
274
275         spin_lock_irqsave(&dbf->hba_lock, flags);
276         memset(r, 0, sizeof(*r));
277         strncpy(r->tag, "qdio", ZFCP_DBF_TAG_SIZE);
278         r->u.qdio.qdio_error = qdio_error;
279         r->u.qdio.sbal_index = sbal_index;
280         r->u.qdio.sbal_count = sbal_count;
281         debug_event(dbf->hba, 0, r, sizeof(*r));
282         spin_unlock_irqrestore(&dbf->hba_lock, flags);
283 }
284
285 /**
286  * zfcp_dbf_hba_berr - trace event for bit error threshold
287  * @dbf: dbf structure affected by this QDIO related event
288  * @req: fsf request
289  */
290 void zfcp_dbf_hba_berr(struct zfcp_dbf *dbf, struct zfcp_fsf_req *req)
291 {
292         struct zfcp_dbf_hba_record *r = &dbf->hba_buf;
293         struct fsf_status_read_buffer *sr_buf = req->data;
294         struct fsf_bit_error_payload *err = &sr_buf->payload.bit_error;
295         unsigned long flags;
296
297         spin_lock_irqsave(&dbf->hba_lock, flags);
298         memset(r, 0, sizeof(*r));
299         strncpy(r->tag, "berr", ZFCP_DBF_TAG_SIZE);
300         memcpy(&r->u.berr, err, sizeof(struct fsf_bit_error_payload));
301         debug_event(dbf->hba, 0, r, sizeof(*r));
302         spin_unlock_irqrestore(&dbf->hba_lock, flags);
303 }
304 static void zfcp_dbf_hba_view_response(char **p,
305                                        struct zfcp_dbf_hba_record_response *r)
306 {
307         struct timespec t;
308
309         zfcp_dbf_out(p, "fsf_command", "0x%08x", r->fsf_command);
310         zfcp_dbf_out(p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
311         zfcp_dbf_out(p, "fsf_seqno", "0x%08x", r->fsf_seqno);
312         stck_to_timespec(r->fsf_issued, &t);
313         zfcp_dbf_out(p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
314         zfcp_dbf_out(p, "fsf_prot_status", "0x%08x", r->fsf_prot_status);
315         zfcp_dbf_out(p, "fsf_status", "0x%08x", r->fsf_status);
316         zfcp_dbf_outd(p, "fsf_prot_status_qual", r->fsf_prot_status_qual,
317                       FSF_PROT_STATUS_QUAL_SIZE, 0, FSF_PROT_STATUS_QUAL_SIZE);
318         zfcp_dbf_outd(p, "fsf_status_qual", r->fsf_status_qual,
319                       FSF_STATUS_QUALIFIER_SIZE, 0, FSF_STATUS_QUALIFIER_SIZE);
320         zfcp_dbf_out(p, "fsf_req_status", "0x%08x", r->fsf_req_status);
321         zfcp_dbf_out(p, "sbal_first", "0x%02x", r->sbal_first);
322         zfcp_dbf_out(p, "sbal_last", "0x%02x", r->sbal_last);
323         zfcp_dbf_out(p, "sbal_response", "0x%02x", r->sbal_response);
324         zfcp_dbf_out(p, "pool", "0x%02x", r->pool);
325
326         switch (r->fsf_command) {
327         case FSF_QTCB_FCP_CMND:
328                 if (r->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
329                         break;
330                 zfcp_dbf_out(p, "data_direction", "0x%04x", r->u.fcp.data_dir);
331                 zfcp_dbf_out(p, "scsi_cmnd", "0x%0Lx", r->u.fcp.cmnd);
332                 *p += sprintf(*p, "\n");
333                 break;
334
335         case FSF_QTCB_OPEN_PORT_WITH_DID:
336         case FSF_QTCB_CLOSE_PORT:
337         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
338                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.port.wwpn);
339                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.port.d_id);
340                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.port.port_handle);
341                 break;
342
343         case FSF_QTCB_OPEN_LUN:
344         case FSF_QTCB_CLOSE_LUN:
345                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.unit.wwpn);
346                 zfcp_dbf_out(p, "fcp_lun", "0x%016Lx", r->u.unit.fcp_lun);
347                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.unit.port_handle);
348                 zfcp_dbf_out(p, "lun_handle", "0x%08x", r->u.unit.lun_handle);
349                 break;
350
351         case FSF_QTCB_SEND_ELS:
352                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.els.d_id);
353                 break;
354
355         case FSF_QTCB_ABORT_FCP_CMND:
356         case FSF_QTCB_SEND_GENERIC:
357         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
358         case FSF_QTCB_EXCHANGE_PORT_DATA:
359         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
360         case FSF_QTCB_UPLOAD_CONTROL_FILE:
361                 break;
362         }
363 }
364
365 static void zfcp_dbf_hba_view_status(char **p,
366                                      struct zfcp_dbf_hba_record_status *r)
367 {
368         zfcp_dbf_out(p, "failed", "0x%02x", r->failed);
369         zfcp_dbf_out(p, "status_type", "0x%08x", r->status_type);
370         zfcp_dbf_out(p, "status_subtype", "0x%08x", r->status_subtype);
371         zfcp_dbf_outd(p, "queue_designator", (char *)&r->queue_designator,
372                       sizeof(struct fsf_queue_designator), 0,
373                       sizeof(struct fsf_queue_designator));
374         zfcp_dbf_outd(p, "payload", (char *)&r->payload, r->payload_size, 0,
375                       r->payload_size);
376 }
377
378 static void zfcp_dbf_hba_view_qdio(char **p, struct zfcp_dbf_hba_record_qdio *r)
379 {
380         zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
381         zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
382         zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
383 }
384
385 static void zfcp_dbf_hba_view_berr(char **p, struct fsf_bit_error_payload *r)
386 {
387         zfcp_dbf_out(p, "link_failures", "%d", r->link_failure_error_count);
388         zfcp_dbf_out(p, "loss_of_sync_err", "%d", r->loss_of_sync_error_count);
389         zfcp_dbf_out(p, "loss_of_sig_err", "%d", r->loss_of_signal_error_count);
390         zfcp_dbf_out(p, "prim_seq_err", "%d",
391                      r->primitive_sequence_error_count);
392         zfcp_dbf_out(p, "inval_trans_word_err", "%d",
393                      r->invalid_transmission_word_error_count);
394         zfcp_dbf_out(p, "CRC_errors", "%d", r->crc_error_count);
395         zfcp_dbf_out(p, "prim_seq_event_to", "%d",
396                      r->primitive_sequence_event_timeout_count);
397         zfcp_dbf_out(p, "elast_buf_overrun_err", "%d",
398                      r->elastic_buffer_overrun_error_count);
399         zfcp_dbf_out(p, "adv_rec_buf2buf_cred", "%d",
400                      r->advertised_receive_b2b_credit);
401         zfcp_dbf_out(p, "curr_rec_buf2buf_cred", "%d",
402                      r->current_receive_b2b_credit);
403         zfcp_dbf_out(p, "adv_trans_buf2buf_cred", "%d",
404                      r->advertised_transmit_b2b_credit);
405         zfcp_dbf_out(p, "curr_trans_buf2buf_cred", "%d",
406                      r->current_transmit_b2b_credit);
407 }
408
409 static int zfcp_dbf_hba_view_format(debug_info_t *id, struct debug_view *view,
410                                     char *out_buf, const char *in_buf)
411 {
412         struct zfcp_dbf_hba_record *r = (struct zfcp_dbf_hba_record *)in_buf;
413         char *p = out_buf;
414
415         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
416                 return 0;
417
418         zfcp_dbf_tag(&p, "tag", r->tag);
419         if (isalpha(r->tag2[0]))
420                 zfcp_dbf_tag(&p, "tag2", r->tag2);
421
422         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
423                 zfcp_dbf_hba_view_response(&p, &r->u.response);
424         else if (strncmp(r->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
425                 zfcp_dbf_hba_view_status(&p, &r->u.status);
426         else if (strncmp(r->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
427                 zfcp_dbf_hba_view_qdio(&p, &r->u.qdio);
428         else if (strncmp(r->tag, "berr", ZFCP_DBF_TAG_SIZE) == 0)
429                 zfcp_dbf_hba_view_berr(&p, &r->u.berr);
430
431         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) != 0)
432                 p += sprintf(p, "\n");
433         return p - out_buf;
434 }
435
436 static struct debug_view zfcp_dbf_hba_view = {
437         .name = "structured",
438         .header_proc = zfcp_dbf_view_header,
439         .format_proc = zfcp_dbf_hba_view_format,
440 };
441
442 static const char *zfcp_dbf_rec_tags[] = {
443         [ZFCP_REC_DBF_ID_THREAD] = "thread",
444         [ZFCP_REC_DBF_ID_TARGET] = "target",
445         [ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
446         [ZFCP_REC_DBF_ID_ACTION] = "action",
447 };
448
449 static int zfcp_dbf_rec_view_format(debug_info_t *id, struct debug_view *view,
450                                     char *buf, const char *_rec)
451 {
452         struct zfcp_dbf_rec_record *r = (struct zfcp_dbf_rec_record *)_rec;
453         char *p = buf;
454         char hint[ZFCP_DBF_ID_SIZE + 1];
455
456         memcpy(hint, r->id2, ZFCP_DBF_ID_SIZE);
457         hint[ZFCP_DBF_ID_SIZE] = 0;
458         zfcp_dbf_outs(&p, "tag", zfcp_dbf_rec_tags[r->id]);
459         zfcp_dbf_outs(&p, "hint", hint);
460         switch (r->id) {
461         case ZFCP_REC_DBF_ID_THREAD:
462                 zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
463                 zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
464                 zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
465                 break;
466         case ZFCP_REC_DBF_ID_TARGET:
467                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
468                 zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
469                 zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
470                 zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
471                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
472                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
473                 break;
474         case ZFCP_REC_DBF_ID_TRIGGER:
475                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
476                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
477                 zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
478                 zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
479                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
480                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
481                 zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
482                 zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
483                 zfcp_dbf_out(&p, "lun_status", "0x%08x", r->u.trigger.ls);
484                 break;
485         case ZFCP_REC_DBF_ID_ACTION:
486                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
487                 zfcp_dbf_out(&p, "fsf_req", "0x%016Lx", r->u.action.fsf_req);
488                 zfcp_dbf_out(&p, "status", "0x%08Lx", r->u.action.status);
489                 zfcp_dbf_out(&p, "step", "0x%08Lx", r->u.action.step);
490                 break;
491         }
492         p += sprintf(p, "\n");
493         return p - buf;
494 }
495
496 static struct debug_view zfcp_dbf_rec_view = {
497         .name = "structured",
498         .header_proc = zfcp_dbf_view_header,
499         .format_proc = zfcp_dbf_rec_view_format,
500 };
501
502 /**
503  * zfcp_dbf_rec_thread - trace event related to recovery thread operation
504  * @id2: identifier for event
505  * @dbf: reference to dbf structure
506  * This function assumes that the caller is holding erp_lock.
507  */
508 void zfcp_dbf_rec_thread(char *id2, struct zfcp_dbf *dbf)
509 {
510         struct zfcp_adapter *adapter = dbf->adapter;
511         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
512         unsigned long flags = 0;
513         struct list_head *entry;
514         unsigned ready = 0, running = 0, total;
515
516         list_for_each(entry, &adapter->erp_ready_head)
517                 ready++;
518         list_for_each(entry, &adapter->erp_running_head)
519                 running++;
520         total = adapter->erp_total_count;
521
522         spin_lock_irqsave(&dbf->rec_lock, flags);
523         memset(r, 0, sizeof(*r));
524         r->id = ZFCP_REC_DBF_ID_THREAD;
525         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
526         r->u.thread.total = total;
527         r->u.thread.ready = ready;
528         r->u.thread.running = running;
529         debug_event(dbf->rec, 6, r, sizeof(*r));
530         spin_unlock_irqrestore(&dbf->rec_lock, flags);
531 }
532
533 /**
534  * zfcp_dbf_rec_thread - trace event related to recovery thread operation
535  * @id2: identifier for event
536  * @adapter: adapter
537  * This function assumes that the caller does not hold erp_lock.
538  */
539 void zfcp_dbf_rec_thread_lock(char *id2, struct zfcp_dbf *dbf)
540 {
541         struct zfcp_adapter *adapter = dbf->adapter;
542         unsigned long flags;
543
544         read_lock_irqsave(&adapter->erp_lock, flags);
545         zfcp_dbf_rec_thread(id2, dbf);
546         read_unlock_irqrestore(&adapter->erp_lock, flags);
547 }
548
549 static void zfcp_dbf_rec_target(char *id2, void *ref, struct zfcp_dbf *dbf,
550                                 atomic_t *status, atomic_t *erp_count, u64 wwpn,
551                                 u32 d_id, u64 fcp_lun)
552 {
553         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
554         unsigned long flags;
555
556         spin_lock_irqsave(&dbf->rec_lock, flags);
557         memset(r, 0, sizeof(*r));
558         r->id = ZFCP_REC_DBF_ID_TARGET;
559         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
560         r->u.target.ref = (unsigned long)ref;
561         r->u.target.status = atomic_read(status);
562         r->u.target.wwpn = wwpn;
563         r->u.target.d_id = d_id;
564         r->u.target.fcp_lun = fcp_lun;
565         r->u.target.erp_count = atomic_read(erp_count);
566         debug_event(dbf->rec, 3, r, sizeof(*r));
567         spin_unlock_irqrestore(&dbf->rec_lock, flags);
568 }
569
570 /**
571  * zfcp_dbf_rec_adapter - trace event for adapter state change
572  * @id: identifier for trigger of state change
573  * @ref: additional reference (e.g. request)
574  * @dbf: reference to dbf structure
575  */
576 void zfcp_dbf_rec_adapter(char *id, void *ref, struct zfcp_dbf *dbf)
577 {
578         struct zfcp_adapter *adapter = dbf->adapter;
579
580         zfcp_dbf_rec_target(id, ref, dbf, &adapter->status,
581                             &adapter->erp_counter, 0, 0,
582                             ZFCP_DBF_INVALID_LUN);
583 }
584
585 /**
586  * zfcp_dbf_rec_port - trace event for port state change
587  * @id: identifier for trigger of state change
588  * @ref: additional reference (e.g. request)
589  * @port: port
590  */
591 void zfcp_dbf_rec_port(char *id, void *ref, struct zfcp_port *port)
592 {
593         struct zfcp_dbf *dbf = port->adapter->dbf;
594
595         zfcp_dbf_rec_target(id, ref, dbf, &port->status,
596                             &port->erp_counter, port->wwpn, port->d_id,
597                             ZFCP_DBF_INVALID_LUN);
598 }
599
600 /**
601  * zfcp_dbf_rec_lun - trace event for LUN state change
602  * @id: identifier for trigger of state change
603  * @ref: additional reference (e.g. request)
604  * @sdev: SCSI device
605  */
606 void zfcp_dbf_rec_lun(char *id, void *ref, struct scsi_device *sdev)
607 {
608         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
609         struct zfcp_port *port = zfcp_sdev->port;
610         struct zfcp_dbf *dbf = port->adapter->dbf;
611
612         zfcp_dbf_rec_target(id, ref, dbf, &zfcp_sdev->status,
613                             &zfcp_sdev->erp_counter, port->wwpn, port->d_id,
614                             zfcp_scsi_dev_lun(sdev));
615 }
616
617 /**
618  * zfcp_dbf_rec_trigger - trace event for triggered error recovery
619  * @id2: identifier for error recovery trigger
620  * @ref: additional reference (e.g. request)
621  * @want: originally requested error recovery action
622  * @need: error recovery action actually initiated
623  * @action: address of error recovery action struct
624  * @adapter: adapter
625  * @port: port
626  * @sdev: SCSI device
627  */
628 void zfcp_dbf_rec_trigger(char *id2, void *ref, u8 want, u8 need, void *action,
629                           struct zfcp_adapter *adapter, struct zfcp_port *port,
630                           struct scsi_device *sdev)
631 {
632         struct zfcp_dbf *dbf = adapter->dbf;
633         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
634         unsigned long flags;
635
636         spin_lock_irqsave(&dbf->rec_lock, flags);
637         memset(r, 0, sizeof(*r));
638         r->id = ZFCP_REC_DBF_ID_TRIGGER;
639         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
640         r->u.trigger.ref = (unsigned long)ref;
641         r->u.trigger.want = want;
642         r->u.trigger.need = need;
643         r->u.trigger.action = (unsigned long)action;
644         r->u.trigger.as = atomic_read(&adapter->status);
645         if (port) {
646                 r->u.trigger.ps = atomic_read(&port->status);
647                 r->u.trigger.wwpn = port->wwpn;
648         }
649         if (sdev)
650                 r->u.trigger.ls = atomic_read(&sdev_to_zfcp(sdev)->status);
651         r->u.trigger.fcp_lun = sdev ? zfcp_scsi_dev_lun(sdev) :
652                                       ZFCP_DBF_INVALID_LUN;
653         debug_event(dbf->rec, action ? 1 : 4, r, sizeof(*r));
654         spin_unlock_irqrestore(&dbf->rec_lock, flags);
655 }
656
657 /**
658  * zfcp_dbf_rec_action - trace event showing progress of recovery action
659  * @id2: identifier
660  * @erp_action: error recovery action struct pointer
661  */
662 void zfcp_dbf_rec_action(char *id2, struct zfcp_erp_action *erp_action)
663 {
664         struct zfcp_dbf *dbf = erp_action->adapter->dbf;
665         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
666         unsigned long flags;
667
668         spin_lock_irqsave(&dbf->rec_lock, flags);
669         memset(r, 0, sizeof(*r));
670         r->id = ZFCP_REC_DBF_ID_ACTION;
671         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
672         r->u.action.action = (unsigned long)erp_action;
673         r->u.action.status = erp_action->status;
674         r->u.action.step = erp_action->step;
675         r->u.action.fsf_req = erp_action->fsf_req_id;
676         debug_event(dbf->rec, 5, r, sizeof(*r));
677         spin_unlock_irqrestore(&dbf->rec_lock, flags);
678 }
679
680 /**
681  * zfcp_dbf_san_ct_request - trace event for issued CT request
682  * @fsf_req: request containing issued CT data
683  * @d_id: destination id where ct request is sent to
684  */
685 void zfcp_dbf_san_ct_request(struct zfcp_fsf_req *fsf_req, u32 d_id)
686 {
687         struct zfcp_fsf_ct_els *ct = (struct zfcp_fsf_ct_els *)fsf_req->data;
688         struct zfcp_adapter *adapter = fsf_req->adapter;
689         struct zfcp_dbf *dbf = adapter->dbf;
690         struct fc_ct_hdr *hdr = sg_virt(ct->req);
691         struct zfcp_dbf_san_record *r = &dbf->san_buf;
692         struct zfcp_dbf_san_record_ct_request *oct = &r->u.ct_req;
693         int level = 3;
694         unsigned long flags;
695
696         spin_lock_irqsave(&dbf->san_lock, flags);
697         memset(r, 0, sizeof(*r));
698         strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
699         r->fsf_reqid = fsf_req->req_id;
700         r->fsf_seqno = fsf_req->seq_no;
701         oct->d_id = d_id;
702         oct->cmd_req_code = hdr->ct_cmd;
703         oct->revision = hdr->ct_rev;
704         oct->gs_type = hdr->ct_fs_type;
705         oct->gs_subtype = hdr->ct_fs_subtype;
706         oct->options = hdr->ct_options;
707         oct->max_res_size = hdr->ct_mr_size;
708         oct->len = min((int)ct->req->length - (int)sizeof(struct fc_ct_hdr),
709                        ZFCP_DBF_SAN_MAX_PAYLOAD);
710         debug_event(dbf->san, level, r, sizeof(*r));
711         zfcp_dbf_hexdump(dbf->san, r, sizeof(*r), level,
712                          (void *)hdr + sizeof(struct fc_ct_hdr), oct->len);
713         spin_unlock_irqrestore(&dbf->san_lock, flags);
714 }
715
716 /**
717  * zfcp_dbf_san_ct_response - trace event for completion of CT request
718  * @fsf_req: request containing CT response
719  */
720 void zfcp_dbf_san_ct_response(struct zfcp_fsf_req *fsf_req)
721 {
722         struct zfcp_fsf_ct_els *ct = (struct zfcp_fsf_ct_els *)fsf_req->data;
723         struct zfcp_adapter *adapter = fsf_req->adapter;
724         struct fc_ct_hdr *hdr = sg_virt(ct->resp);
725         struct zfcp_dbf *dbf = adapter->dbf;
726         struct zfcp_dbf_san_record *r = &dbf->san_buf;
727         struct zfcp_dbf_san_record_ct_response *rct = &r->u.ct_resp;
728         int level = 3;
729         unsigned long flags;
730
731         spin_lock_irqsave(&dbf->san_lock, flags);
732         memset(r, 0, sizeof(*r));
733         strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
734         r->fsf_reqid = fsf_req->req_id;
735         r->fsf_seqno = fsf_req->seq_no;
736         rct->cmd_rsp_code = hdr->ct_cmd;
737         rct->revision = hdr->ct_rev;
738         rct->reason_code = hdr->ct_reason;
739         rct->expl = hdr->ct_explan;
740         rct->vendor_unique = hdr->ct_vendor;
741         rct->max_res_size = hdr->ct_mr_size;
742         rct->len = min((int)ct->resp->length - (int)sizeof(struct fc_ct_hdr),
743                        ZFCP_DBF_SAN_MAX_PAYLOAD);
744         debug_event(dbf->san, level, r, sizeof(*r));
745         zfcp_dbf_hexdump(dbf->san, r, sizeof(*r), level,
746                          (void *)hdr + sizeof(struct fc_ct_hdr), rct->len);
747         spin_unlock_irqrestore(&dbf->san_lock, flags);
748 }
749
750 static void zfcp_dbf_san_els(const char *tag, int level,
751                              struct zfcp_fsf_req *fsf_req, u32 d_id,
752                              void *buffer, int buflen)
753 {
754         struct zfcp_adapter *adapter = fsf_req->adapter;
755         struct zfcp_dbf *dbf = adapter->dbf;
756         struct zfcp_dbf_san_record *rec = &dbf->san_buf;
757         unsigned long flags;
758
759         spin_lock_irqsave(&dbf->san_lock, flags);
760         memset(rec, 0, sizeof(*rec));
761         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
762         rec->fsf_reqid = fsf_req->req_id;
763         rec->fsf_seqno = fsf_req->seq_no;
764         rec->u.els.d_id = d_id;
765         debug_event(dbf->san, level, rec, sizeof(*rec));
766         zfcp_dbf_hexdump(dbf->san, rec, sizeof(*rec), level,
767                          buffer, min(buflen, ZFCP_DBF_SAN_MAX_PAYLOAD));
768         spin_unlock_irqrestore(&dbf->san_lock, flags);
769 }
770
771 /**
772  * zfcp_dbf_san_els_request - trace event for issued ELS
773  * @fsf_req: request containing issued ELS
774  */
775 void zfcp_dbf_san_els_request(struct zfcp_fsf_req *fsf_req)
776 {
777         struct zfcp_fsf_ct_els *els = (struct zfcp_fsf_ct_els *)fsf_req->data;
778         u32 d_id = ntoh24(fsf_req->qtcb->bottom.support.d_id);
779
780         zfcp_dbf_san_els("oels", 2, fsf_req, d_id,
781                          sg_virt(els->req), els->req->length);
782 }
783
784 /**
785  * zfcp_dbf_san_els_response - trace event for completed ELS
786  * @fsf_req: request containing ELS response
787  */
788 void zfcp_dbf_san_els_response(struct zfcp_fsf_req *fsf_req)
789 {
790         struct zfcp_fsf_ct_els *els = (struct zfcp_fsf_ct_els *)fsf_req->data;
791         u32 d_id = ntoh24(fsf_req->qtcb->bottom.support.d_id);
792
793         zfcp_dbf_san_els("rels", 2, fsf_req, d_id,
794                                sg_virt(els->resp), els->resp->length);
795 }
796
797 /**
798  * zfcp_dbf_san_incoming_els - trace event for incomig ELS
799  * @fsf_req: request containing unsolicited status buffer with incoming ELS
800  */
801 void zfcp_dbf_san_incoming_els(struct zfcp_fsf_req *fsf_req)
802 {
803         struct fsf_status_read_buffer *buf =
804                         (struct fsf_status_read_buffer *)fsf_req->data;
805         int length = (int)buf->length -
806                      (int)((void *)&buf->payload - (void *)buf);
807
808         zfcp_dbf_san_els("iels", 1, fsf_req, ntoh24(buf->d_id),
809                                (void *)buf->payload.data, length);
810 }
811
812 static int zfcp_dbf_san_view_format(debug_info_t *id, struct debug_view *view,
813                                     char *out_buf, const char *in_buf)
814 {
815         struct zfcp_dbf_san_record *r = (struct zfcp_dbf_san_record *)in_buf;
816         char *p = out_buf;
817
818         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
819                 return 0;
820
821         zfcp_dbf_tag(&p, "tag", r->tag);
822         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
823         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
824
825         if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
826                 struct zfcp_dbf_san_record_ct_request *ct = &r->u.ct_req;
827                 zfcp_dbf_out(&p, "d_id", "0x%06x", ct->d_id);
828                 zfcp_dbf_out(&p, "cmd_req_code", "0x%04x", ct->cmd_req_code);
829                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
830                 zfcp_dbf_out(&p, "gs_type", "0x%02x", ct->gs_type);
831                 zfcp_dbf_out(&p, "gs_subtype", "0x%02x", ct->gs_subtype);
832                 zfcp_dbf_out(&p, "options", "0x%02x", ct->options);
833                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
834         } else if (strncmp(r->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
835                 struct zfcp_dbf_san_record_ct_response *ct = &r->u.ct_resp;
836                 zfcp_dbf_out(&p, "cmd_rsp_code", "0x%04x", ct->cmd_rsp_code);
837                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
838                 zfcp_dbf_out(&p, "reason_code", "0x%02x", ct->reason_code);
839                 zfcp_dbf_out(&p, "reason_code_expl", "0x%02x", ct->expl);
840                 zfcp_dbf_out(&p, "vendor_unique", "0x%02x", ct->vendor_unique);
841                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
842         } else if (strncmp(r->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
843                    strncmp(r->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
844                    strncmp(r->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
845                 struct zfcp_dbf_san_record_els *els = &r->u.els;
846                 zfcp_dbf_out(&p, "d_id", "0x%06x", els->d_id);
847         }
848         return p - out_buf;
849 }
850
851 static struct debug_view zfcp_dbf_san_view = {
852         .name = "structured",
853         .header_proc = zfcp_dbf_view_header,
854         .format_proc = zfcp_dbf_san_view_format,
855 };
856
857 void _zfcp_dbf_scsi(const char *tag, const char *tag2, int level,
858                     struct zfcp_dbf *dbf, struct scsi_cmnd *scsi_cmnd,
859                     struct zfcp_fsf_req *fsf_req, unsigned long old_req_id)
860 {
861         struct zfcp_dbf_scsi_record *rec = &dbf->scsi_buf;
862         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
863         unsigned long flags;
864         struct fcp_resp_with_ext *fcp_rsp;
865         struct fcp_resp_rsp_info *fcp_rsp_info = NULL;
866         char *fcp_sns_info = NULL;
867         int offset = 0, buflen = 0;
868
869         spin_lock_irqsave(&dbf->scsi_lock, flags);
870         do {
871                 memset(rec, 0, sizeof(*rec));
872                 if (offset == 0) {
873                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
874                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
875                         if (scsi_cmnd != NULL) {
876                                 if (scsi_cmnd->device) {
877                                         rec->scsi_id = scsi_cmnd->device->id;
878                                         rec->scsi_lun = scsi_cmnd->device->lun;
879                                 }
880                                 rec->scsi_result = scsi_cmnd->result;
881                                 rec->scsi_cmnd = (unsigned long)scsi_cmnd;
882                                 memcpy(rec->scsi_opcode, scsi_cmnd->cmnd,
883                                         min((int)scsi_cmnd->cmd_len,
884                                                 ZFCP_DBF_SCSI_OPCODE));
885                                 rec->scsi_retries = scsi_cmnd->retries;
886                                 rec->scsi_allowed = scsi_cmnd->allowed;
887                         }
888                         if (fsf_req != NULL) {
889                                 fcp_rsp = (struct fcp_resp_with_ext *)
890                                         &(fsf_req->qtcb->bottom.io.fcp_rsp);
891                                 fcp_rsp_info = (struct fcp_resp_rsp_info *)
892                                         &fcp_rsp[1];
893                                 fcp_sns_info = (char *) &fcp_rsp[1];
894                                 if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL)
895                                         fcp_sns_info += fcp_rsp->ext.fr_sns_len;
896
897                                 rec->rsp_validity = fcp_rsp->resp.fr_flags;
898                                 rec->rsp_scsi_status = fcp_rsp->resp.fr_status;
899                                 rec->rsp_resid = fcp_rsp->ext.fr_resid;
900                                 if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL)
901                                         rec->rsp_code = fcp_rsp_info->rsp_code;
902                                 if (fcp_rsp->resp.fr_flags & FCP_SNS_LEN_VAL) {
903                                         buflen = min(fcp_rsp->ext.fr_sns_len,
904                                            (u32)ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
905                                         rec->sns_info_len = buflen;
906                                         memcpy(rec->sns_info, fcp_sns_info,
907                                                min(buflen,
908                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
909                                         offset += min(buflen,
910                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
911                                 }
912
913                                 rec->fsf_reqid = fsf_req->req_id;
914                                 rec->fsf_seqno = fsf_req->seq_no;
915                                 rec->fsf_issued = fsf_req->issued;
916                         }
917                         rec->old_fsf_reqid = old_req_id;
918                 } else {
919                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
920                         dump->total_size = buflen;
921                         dump->offset = offset;
922                         dump->size = min(buflen - offset,
923                                          (int)sizeof(struct
924                                                      zfcp_dbf_scsi_record) -
925                                          (int)sizeof(struct zfcp_dbf_dump));
926                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
927                         offset += dump->size;
928                 }
929                 debug_event(dbf->scsi, level, rec, sizeof(*rec));
930         } while (offset < buflen);
931         spin_unlock_irqrestore(&dbf->scsi_lock, flags);
932 }
933
934 static int zfcp_dbf_scsi_view_format(debug_info_t *id, struct debug_view *view,
935                                      char *out_buf, const char *in_buf)
936 {
937         struct zfcp_dbf_scsi_record *r = (struct zfcp_dbf_scsi_record *)in_buf;
938         struct timespec t;
939         char *p = out_buf;
940
941         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
942                 return 0;
943
944         zfcp_dbf_tag(&p, "tag", r->tag);
945         zfcp_dbf_tag(&p, "tag2", r->tag2);
946         zfcp_dbf_out(&p, "scsi_id", "0x%08x", r->scsi_id);
947         zfcp_dbf_out(&p, "scsi_lun", "0x%08x", r->scsi_lun);
948         zfcp_dbf_out(&p, "scsi_result", "0x%08x", r->scsi_result);
949         zfcp_dbf_out(&p, "scsi_cmnd", "0x%0Lx", r->scsi_cmnd);
950         zfcp_dbf_outd(&p, "scsi_opcode", r->scsi_opcode, ZFCP_DBF_SCSI_OPCODE,
951                       0, ZFCP_DBF_SCSI_OPCODE);
952         zfcp_dbf_out(&p, "scsi_retries", "0x%02x", r->scsi_retries);
953         zfcp_dbf_out(&p, "scsi_allowed", "0x%02x", r->scsi_allowed);
954         if (strncmp(r->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0)
955                 zfcp_dbf_out(&p, "old_fsf_reqid", "0x%0Lx", r->old_fsf_reqid);
956         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
957         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
958         stck_to_timespec(r->fsf_issued, &t);
959         zfcp_dbf_out(&p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
960
961         if (strncmp(r->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
962                 zfcp_dbf_out(&p, "fcp_rsp_validity", "0x%02x", r->rsp_validity);
963                 zfcp_dbf_out(&p, "fcp_rsp_scsi_status", "0x%02x",
964                              r->rsp_scsi_status);
965                 zfcp_dbf_out(&p, "fcp_rsp_resid", "0x%08x", r->rsp_resid);
966                 zfcp_dbf_out(&p, "fcp_rsp_code", "0x%08x", r->rsp_code);
967                 zfcp_dbf_out(&p, "fcp_sns_info_len", "0x%08x", r->sns_info_len);
968                 zfcp_dbf_outd(&p, "fcp_sns_info", r->sns_info,
969                               min((int)r->sns_info_len,
970                               ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
971                               r->sns_info_len);
972         }
973         p += sprintf(p, "\n");
974         return p - out_buf;
975 }
976
977 static struct debug_view zfcp_dbf_scsi_view = {
978         .name = "structured",
979         .header_proc = zfcp_dbf_view_header,
980         .format_proc = zfcp_dbf_scsi_view_format,
981 };
982
983 static debug_info_t *zfcp_dbf_reg(const char *name, int level,
984                                   struct debug_view *view, int size)
985 {
986         struct debug_info *d;
987
988         d = debug_register(name, dbfsize, level, size);
989         if (!d)
990                 return NULL;
991
992         debug_register_view(d, &debug_hex_ascii_view);
993         debug_register_view(d, view);
994         debug_set_level(d, level);
995
996         return d;
997 }
998
999 /**
1000  * zfcp_adapter_debug_register - registers debug feature for an adapter
1001  * @adapter: pointer to adapter for which debug features should be registered
1002  * return: -ENOMEM on error, 0 otherwise
1003  */
1004 int zfcp_dbf_adapter_register(struct zfcp_adapter *adapter)
1005 {
1006         char dbf_name[DEBUG_MAX_NAME_LEN];
1007         struct zfcp_dbf *dbf;
1008
1009         dbf = kzalloc(sizeof(struct zfcp_dbf), GFP_KERNEL);
1010         if (!dbf)
1011                 return -ENOMEM;
1012
1013         dbf->adapter = adapter;
1014
1015         spin_lock_init(&dbf->hba_lock);
1016         spin_lock_init(&dbf->san_lock);
1017         spin_lock_init(&dbf->scsi_lock);
1018         spin_lock_init(&dbf->rec_lock);
1019
1020         /* debug feature area which records recovery activity */
1021         sprintf(dbf_name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev));
1022         dbf->rec = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_rec_view,
1023                                 sizeof(struct zfcp_dbf_rec_record));
1024         if (!dbf->rec)
1025                 goto err_out;
1026
1027         /* debug feature area which records HBA (FSF and QDIO) conditions */
1028         sprintf(dbf_name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev));
1029         dbf->hba = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_hba_view,
1030                                 sizeof(struct zfcp_dbf_hba_record));
1031         if (!dbf->hba)
1032                 goto err_out;
1033
1034         /* debug feature area which records SAN command failures and recovery */
1035         sprintf(dbf_name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev));
1036         dbf->san = zfcp_dbf_reg(dbf_name, 6, &zfcp_dbf_san_view,
1037                                 sizeof(struct zfcp_dbf_san_record));
1038         if (!dbf->san)
1039                 goto err_out;
1040
1041         /* debug feature area which records SCSI command failures and recovery */
1042         sprintf(dbf_name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev));
1043         dbf->scsi = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_scsi_view,
1044                                  sizeof(struct zfcp_dbf_scsi_record));
1045         if (!dbf->scsi)
1046                 goto err_out;
1047
1048         adapter->dbf = dbf;
1049         return 0;
1050
1051 err_out:
1052         zfcp_dbf_adapter_unregister(dbf);
1053         return -ENOMEM;
1054 }
1055
1056 /**
1057  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
1058  * @dbf: pointer to dbf for which debug features should be unregistered
1059  */
1060 void zfcp_dbf_adapter_unregister(struct zfcp_dbf *dbf)
1061 {
1062         if (!dbf)
1063                 return;
1064         debug_unregister(dbf->scsi);
1065         debug_unregister(dbf->san);
1066         debug_unregister(dbf->hba);
1067         debug_unregister(dbf->rec);
1068         dbf->adapter->dbf = NULL;
1069         kfree(dbf);
1070 }
1071