Merge branch 'for-rmk/samsung6' of git://git.fluff.org/bjdooks/linux into devel-stable
[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 <asm/debug.h>
14 #include "zfcp_dbf.h"
15 #include "zfcp_ext.h"
16 #include "zfcp_fc.h"
17
18 static u32 dbfsize = 4;
19
20 module_param(dbfsize, uint, 0400);
21 MODULE_PARM_DESC(dbfsize,
22                  "number of pages for each debug feature area (default 4)");
23
24 static void zfcp_dbf_hexdump(debug_info_t *dbf, void *to, int to_len,
25                              int level, char *from, int from_len)
26 {
27         int offset;
28         struct zfcp_dbf_dump *dump = to;
29         int room = to_len - sizeof(*dump);
30
31         for (offset = 0; offset < from_len; offset += dump->size) {
32                 memset(to, 0, to_len);
33                 strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
34                 dump->total_size = from_len;
35                 dump->offset = offset;
36                 dump->size = min(from_len - offset, room);
37                 memcpy(dump->data, from + offset, dump->size);
38                 debug_event(dbf, level, dump, dump->size + sizeof(*dump));
39         }
40 }
41
42 static void zfcp_dbf_tag(char **p, const char *label, const char *tag)
43 {
44         int i;
45
46         *p += sprintf(*p, "%-24s", label);
47         for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
48                 *p += sprintf(*p, "%c", tag[i]);
49         *p += sprintf(*p, "\n");
50 }
51
52 static void zfcp_dbf_outs(char **buf, const char *s1, const char *s2)
53 {
54         *buf += sprintf(*buf, "%-24s%s\n", s1, s2);
55 }
56
57 static void zfcp_dbf_out(char **buf, const char *s, const char *format, ...)
58 {
59         va_list arg;
60
61         *buf += sprintf(*buf, "%-24s", s);
62         va_start(arg, format);
63         *buf += vsprintf(*buf, format, arg);
64         va_end(arg);
65         *buf += sprintf(*buf, "\n");
66 }
67
68 static void zfcp_dbf_outd(char **p, const char *label, char *buffer,
69                           int buflen, int offset, int total_size)
70 {
71         if (!offset)
72                 *p += sprintf(*p, "%-24s  ", label);
73         while (buflen--) {
74                 if (offset > 0) {
75                         if ((offset % 32) == 0)
76                                 *p += sprintf(*p, "\n%-24c  ", ' ');
77                         else if ((offset % 4) == 0)
78                                 *p += sprintf(*p, " ");
79                 }
80                 *p += sprintf(*p, "%02x", *buffer++);
81                 if (++offset == total_size) {
82                         *p += sprintf(*p, "\n");
83                         break;
84                 }
85         }
86         if (!total_size)
87                 *p += sprintf(*p, "\n");
88 }
89
90 static int zfcp_dbf_view_header(debug_info_t *id, struct debug_view *view,
91                                 int area, debug_entry_t *entry, char *out_buf)
92 {
93         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
94         struct timespec t;
95         char *p = out_buf;
96
97         if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
98                 stck_to_timespec(entry->id.stck, &t);
99                 zfcp_dbf_out(&p, "timestamp", "%011lu:%06lu",
100                              t.tv_sec, t.tv_nsec);
101                 zfcp_dbf_out(&p, "cpu", "%02i", entry->id.fields.cpuid);
102         } else  {
103                 zfcp_dbf_outd(&p, "", dump->data, dump->size, dump->offset,
104                               dump->total_size);
105                 if ((dump->offset + dump->size) == dump->total_size)
106                         p += sprintf(p, "\n");
107         }
108         return p - out_buf;
109 }
110
111 void _zfcp_dbf_hba_fsf_response(const char *tag2, int level,
112                                 struct zfcp_fsf_req *fsf_req,
113                                 struct zfcp_dbf *dbf)
114 {
115         struct fsf_qtcb *qtcb = fsf_req->qtcb;
116         union fsf_prot_status_qual *prot_status_qual =
117                                         &qtcb->prefix.prot_status_qual;
118         union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
119         struct scsi_cmnd *scsi_cmnd;
120         struct zfcp_port *port;
121         struct zfcp_unit *unit;
122         struct zfcp_send_els *send_els;
123         struct zfcp_dbf_hba_record *rec = &dbf->hba_buf;
124         struct zfcp_dbf_hba_record_response *response = &rec->u.response;
125         unsigned long flags;
126
127         spin_lock_irqsave(&dbf->hba_lock, flags);
128         memset(rec, 0, sizeof(*rec));
129         strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
130         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
131
132         response->fsf_command = fsf_req->fsf_command;
133         response->fsf_reqid = fsf_req->req_id;
134         response->fsf_seqno = fsf_req->seq_no;
135         response->fsf_issued = fsf_req->issued;
136         response->fsf_prot_status = qtcb->prefix.prot_status;
137         response->fsf_status = qtcb->header.fsf_status;
138         memcpy(response->fsf_prot_status_qual,
139                prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
140         memcpy(response->fsf_status_qual,
141                fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
142         response->fsf_req_status = fsf_req->status;
143         response->sbal_first = fsf_req->queue_req.sbal_first;
144         response->sbal_last = fsf_req->queue_req.sbal_last;
145         response->sbal_response = fsf_req->queue_req.sbal_response;
146         response->pool = fsf_req->pool != NULL;
147         response->erp_action = (unsigned long)fsf_req->erp_action;
148
149         switch (fsf_req->fsf_command) {
150         case FSF_QTCB_FCP_CMND:
151                 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
152                         break;
153                 scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
154                 if (scsi_cmnd) {
155                         response->u.fcp.cmnd = (unsigned long)scsi_cmnd;
156                         response->u.fcp.serial = scsi_cmnd->serial_number;
157                 }
158                 break;
159
160         case FSF_QTCB_OPEN_PORT_WITH_DID:
161         case FSF_QTCB_CLOSE_PORT:
162         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
163                 port = (struct zfcp_port *)fsf_req->data;
164                 response->u.port.wwpn = port->wwpn;
165                 response->u.port.d_id = port->d_id;
166                 response->u.port.port_handle = qtcb->header.port_handle;
167                 break;
168
169         case FSF_QTCB_OPEN_LUN:
170         case FSF_QTCB_CLOSE_LUN:
171                 unit = (struct zfcp_unit *)fsf_req->data;
172                 port = unit->port;
173                 response->u.unit.wwpn = port->wwpn;
174                 response->u.unit.fcp_lun = unit->fcp_lun;
175                 response->u.unit.port_handle = qtcb->header.port_handle;
176                 response->u.unit.lun_handle = qtcb->header.lun_handle;
177                 break;
178
179         case FSF_QTCB_SEND_ELS:
180                 send_els = (struct zfcp_send_els *)fsf_req->data;
181                 response->u.els.d_id = ntoh24(qtcb->bottom.support.d_id);
182                 break;
183
184         case FSF_QTCB_ABORT_FCP_CMND:
185         case FSF_QTCB_SEND_GENERIC:
186         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
187         case FSF_QTCB_EXCHANGE_PORT_DATA:
188         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
189         case FSF_QTCB_UPLOAD_CONTROL_FILE:
190                 break;
191         }
192
193         debug_event(dbf->hba, level, rec, sizeof(*rec));
194
195         /* have fcp channel microcode fixed to use as little as possible */
196         if (fsf_req->fsf_command != FSF_QTCB_FCP_CMND) {
197                 /* adjust length skipping trailing zeros */
198                 char *buf = (char *)qtcb + qtcb->header.log_start;
199                 int len = qtcb->header.log_length;
200                 for (; len && !buf[len - 1]; len--);
201                 zfcp_dbf_hexdump(dbf->hba, rec, sizeof(*rec), level, buf,
202                                  len);
203         }
204
205         spin_unlock_irqrestore(&dbf->hba_lock, flags);
206 }
207
208 void _zfcp_dbf_hba_fsf_unsol(const char *tag, int level, struct zfcp_dbf *dbf,
209                              struct fsf_status_read_buffer *status_buffer)
210 {
211         struct zfcp_dbf_hba_record *rec = &dbf->hba_buf;
212         unsigned long flags;
213
214         spin_lock_irqsave(&dbf->hba_lock, flags);
215         memset(rec, 0, sizeof(*rec));
216         strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
217         strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
218
219         rec->u.status.failed = atomic_read(&dbf->adapter->stat_miss);
220         if (status_buffer != NULL) {
221                 rec->u.status.status_type = status_buffer->status_type;
222                 rec->u.status.status_subtype = status_buffer->status_subtype;
223                 memcpy(&rec->u.status.queue_designator,
224                        &status_buffer->queue_designator,
225                        sizeof(struct fsf_queue_designator));
226
227                 switch (status_buffer->status_type) {
228                 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
229                         rec->u.status.payload_size =
230                             ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
231                         break;
232
233                 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
234                         rec->u.status.payload_size =
235                             ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
236                         break;
237
238                 case FSF_STATUS_READ_LINK_DOWN:
239                         switch (status_buffer->status_subtype) {
240                         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
241                         case FSF_STATUS_READ_SUB_FDISC_FAILED:
242                                 rec->u.status.payload_size =
243                                         sizeof(struct fsf_link_down_info);
244                         }
245                         break;
246
247                 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
248                         rec->u.status.payload_size =
249                             ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
250                         break;
251                 }
252                 memcpy(&rec->u.status.payload,
253                        &status_buffer->payload, rec->u.status.payload_size);
254         }
255
256         debug_event(dbf->hba, level, rec, sizeof(*rec));
257         spin_unlock_irqrestore(&dbf->hba_lock, flags);
258 }
259
260 /**
261  * zfcp_dbf_hba_qdio - trace event for QDIO related failure
262  * @qdio: qdio structure affected by this QDIO related event
263  * @qdio_error: as passed by qdio module
264  * @sbal_index: first buffer with error condition, as passed by qdio module
265  * @sbal_count: number of buffers affected, as passed by qdio module
266  */
267 void zfcp_dbf_hba_qdio(struct zfcp_dbf *dbf, unsigned int qdio_error,
268                        int sbal_index, int sbal_count)
269 {
270         struct zfcp_dbf_hba_record *r = &dbf->hba_buf;
271         unsigned long flags;
272
273         spin_lock_irqsave(&dbf->hba_lock, flags);
274         memset(r, 0, sizeof(*r));
275         strncpy(r->tag, "qdio", ZFCP_DBF_TAG_SIZE);
276         r->u.qdio.qdio_error = qdio_error;
277         r->u.qdio.sbal_index = sbal_index;
278         r->u.qdio.sbal_count = sbal_count;
279         debug_event(dbf->hba, 0, r, sizeof(*r));
280         spin_unlock_irqrestore(&dbf->hba_lock, flags);
281 }
282
283 /**
284  * zfcp_dbf_hba_berr - trace event for bit error threshold
285  * @dbf: dbf structure affected by this QDIO related event
286  * @req: fsf request
287  */
288 void zfcp_dbf_hba_berr(struct zfcp_dbf *dbf, struct zfcp_fsf_req *req)
289 {
290         struct zfcp_dbf_hba_record *r = &dbf->hba_buf;
291         struct fsf_status_read_buffer *sr_buf = req->data;
292         struct fsf_bit_error_payload *err = &sr_buf->payload.bit_error;
293         unsigned long flags;
294
295         spin_lock_irqsave(&dbf->hba_lock, flags);
296         memset(r, 0, sizeof(*r));
297         strncpy(r->tag, "berr", ZFCP_DBF_TAG_SIZE);
298         memcpy(&r->u.berr, err, sizeof(struct fsf_bit_error_payload));
299         debug_event(dbf->hba, 0, r, sizeof(*r));
300         spin_unlock_irqrestore(&dbf->hba_lock, flags);
301 }
302 static void zfcp_dbf_hba_view_response(char **p,
303                                        struct zfcp_dbf_hba_record_response *r)
304 {
305         struct timespec t;
306
307         zfcp_dbf_out(p, "fsf_command", "0x%08x", r->fsf_command);
308         zfcp_dbf_out(p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
309         zfcp_dbf_out(p, "fsf_seqno", "0x%08x", r->fsf_seqno);
310         stck_to_timespec(r->fsf_issued, &t);
311         zfcp_dbf_out(p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
312         zfcp_dbf_out(p, "fsf_prot_status", "0x%08x", r->fsf_prot_status);
313         zfcp_dbf_out(p, "fsf_status", "0x%08x", r->fsf_status);
314         zfcp_dbf_outd(p, "fsf_prot_status_qual", r->fsf_prot_status_qual,
315                       FSF_PROT_STATUS_QUAL_SIZE, 0, FSF_PROT_STATUS_QUAL_SIZE);
316         zfcp_dbf_outd(p, "fsf_status_qual", r->fsf_status_qual,
317                       FSF_STATUS_QUALIFIER_SIZE, 0, FSF_STATUS_QUALIFIER_SIZE);
318         zfcp_dbf_out(p, "fsf_req_status", "0x%08x", r->fsf_req_status);
319         zfcp_dbf_out(p, "sbal_first", "0x%02x", r->sbal_first);
320         zfcp_dbf_out(p, "sbal_last", "0x%02x", r->sbal_last);
321         zfcp_dbf_out(p, "sbal_response", "0x%02x", r->sbal_response);
322         zfcp_dbf_out(p, "pool", "0x%02x", r->pool);
323
324         switch (r->fsf_command) {
325         case FSF_QTCB_FCP_CMND:
326                 if (r->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
327                         break;
328                 zfcp_dbf_out(p, "scsi_cmnd", "0x%0Lx", r->u.fcp.cmnd);
329                 zfcp_dbf_out(p, "scsi_serial", "0x%016Lx", r->u.fcp.serial);
330                 *p += sprintf(*p, "\n");
331                 break;
332
333         case FSF_QTCB_OPEN_PORT_WITH_DID:
334         case FSF_QTCB_CLOSE_PORT:
335         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
336                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.port.wwpn);
337                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.port.d_id);
338                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.port.port_handle);
339                 break;
340
341         case FSF_QTCB_OPEN_LUN:
342         case FSF_QTCB_CLOSE_LUN:
343                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.unit.wwpn);
344                 zfcp_dbf_out(p, "fcp_lun", "0x%016Lx", r->u.unit.fcp_lun);
345                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.unit.port_handle);
346                 zfcp_dbf_out(p, "lun_handle", "0x%08x", r->u.unit.lun_handle);
347                 break;
348
349         case FSF_QTCB_SEND_ELS:
350                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.els.d_id);
351                 break;
352
353         case FSF_QTCB_ABORT_FCP_CMND:
354         case FSF_QTCB_SEND_GENERIC:
355         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
356         case FSF_QTCB_EXCHANGE_PORT_DATA:
357         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
358         case FSF_QTCB_UPLOAD_CONTROL_FILE:
359                 break;
360         }
361 }
362
363 static void zfcp_dbf_hba_view_status(char **p,
364                                      struct zfcp_dbf_hba_record_status *r)
365 {
366         zfcp_dbf_out(p, "failed", "0x%02x", r->failed);
367         zfcp_dbf_out(p, "status_type", "0x%08x", r->status_type);
368         zfcp_dbf_out(p, "status_subtype", "0x%08x", r->status_subtype);
369         zfcp_dbf_outd(p, "queue_designator", (char *)&r->queue_designator,
370                       sizeof(struct fsf_queue_designator), 0,
371                       sizeof(struct fsf_queue_designator));
372         zfcp_dbf_outd(p, "payload", (char *)&r->payload, r->payload_size, 0,
373                       r->payload_size);
374 }
375
376 static void zfcp_dbf_hba_view_qdio(char **p, struct zfcp_dbf_hba_record_qdio *r)
377 {
378         zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
379         zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
380         zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
381 }
382
383 static void zfcp_dbf_hba_view_berr(char **p, struct fsf_bit_error_payload *r)
384 {
385         zfcp_dbf_out(p, "link_failures", "%d", r->link_failure_error_count);
386         zfcp_dbf_out(p, "loss_of_sync_err", "%d", r->loss_of_sync_error_count);
387         zfcp_dbf_out(p, "loss_of_sig_err", "%d", r->loss_of_signal_error_count);
388         zfcp_dbf_out(p, "prim_seq_err", "%d",
389                      r->primitive_sequence_error_count);
390         zfcp_dbf_out(p, "inval_trans_word_err", "%d",
391                      r->invalid_transmission_word_error_count);
392         zfcp_dbf_out(p, "CRC_errors", "%d", r->crc_error_count);
393         zfcp_dbf_out(p, "prim_seq_event_to", "%d",
394                      r->primitive_sequence_event_timeout_count);
395         zfcp_dbf_out(p, "elast_buf_overrun_err", "%d",
396                      r->elastic_buffer_overrun_error_count);
397         zfcp_dbf_out(p, "adv_rec_buf2buf_cred", "%d",
398                      r->advertised_receive_b2b_credit);
399         zfcp_dbf_out(p, "curr_rec_buf2buf_cred", "%d",
400                      r->current_receive_b2b_credit);
401         zfcp_dbf_out(p, "adv_trans_buf2buf_cred", "%d",
402                      r->advertised_transmit_b2b_credit);
403         zfcp_dbf_out(p, "curr_trans_buf2buf_cred", "%d",
404                      r->current_transmit_b2b_credit);
405 }
406
407 static int zfcp_dbf_hba_view_format(debug_info_t *id, struct debug_view *view,
408                                     char *out_buf, const char *in_buf)
409 {
410         struct zfcp_dbf_hba_record *r = (struct zfcp_dbf_hba_record *)in_buf;
411         char *p = out_buf;
412
413         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
414                 return 0;
415
416         zfcp_dbf_tag(&p, "tag", r->tag);
417         if (isalpha(r->tag2[0]))
418                 zfcp_dbf_tag(&p, "tag2", r->tag2);
419
420         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
421                 zfcp_dbf_hba_view_response(&p, &r->u.response);
422         else if (strncmp(r->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
423                 zfcp_dbf_hba_view_status(&p, &r->u.status);
424         else if (strncmp(r->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
425                 zfcp_dbf_hba_view_qdio(&p, &r->u.qdio);
426         else if (strncmp(r->tag, "berr", ZFCP_DBF_TAG_SIZE) == 0)
427                 zfcp_dbf_hba_view_berr(&p, &r->u.berr);
428
429         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) != 0)
430                 p += sprintf(p, "\n");
431         return p - out_buf;
432 }
433
434 static struct debug_view zfcp_dbf_hba_view = {
435         .name = "structured",
436         .header_proc = zfcp_dbf_view_header,
437         .format_proc = zfcp_dbf_hba_view_format,
438 };
439
440 static const char *zfcp_dbf_rec_tags[] = {
441         [ZFCP_REC_DBF_ID_THREAD] = "thread",
442         [ZFCP_REC_DBF_ID_TARGET] = "target",
443         [ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
444         [ZFCP_REC_DBF_ID_ACTION] = "action",
445 };
446
447 static int zfcp_dbf_rec_view_format(debug_info_t *id, struct debug_view *view,
448                                     char *buf, const char *_rec)
449 {
450         struct zfcp_dbf_rec_record *r = (struct zfcp_dbf_rec_record *)_rec;
451         char *p = buf;
452         char hint[ZFCP_DBF_ID_SIZE + 1];
453
454         memcpy(hint, r->id2, ZFCP_DBF_ID_SIZE);
455         hint[ZFCP_DBF_ID_SIZE] = 0;
456         zfcp_dbf_outs(&p, "tag", zfcp_dbf_rec_tags[r->id]);
457         zfcp_dbf_outs(&p, "hint", hint);
458         switch (r->id) {
459         case ZFCP_REC_DBF_ID_THREAD:
460                 zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
461                 zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
462                 zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
463                 break;
464         case ZFCP_REC_DBF_ID_TARGET:
465                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
466                 zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
467                 zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
468                 zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
469                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
470                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
471                 break;
472         case ZFCP_REC_DBF_ID_TRIGGER:
473                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
474                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
475                 zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
476                 zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
477                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
478                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
479                 zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
480                 zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
481                 zfcp_dbf_out(&p, "unit_status", "0x%08x", r->u.trigger.us);
482                 break;
483         case ZFCP_REC_DBF_ID_ACTION:
484                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
485                 zfcp_dbf_out(&p, "fsf_req", "0x%016Lx", r->u.action.fsf_req);
486                 zfcp_dbf_out(&p, "status", "0x%08Lx", r->u.action.status);
487                 zfcp_dbf_out(&p, "step", "0x%08Lx", r->u.action.step);
488                 break;
489         }
490         p += sprintf(p, "\n");
491         return p - buf;
492 }
493
494 static struct debug_view zfcp_dbf_rec_view = {
495         .name = "structured",
496         .header_proc = zfcp_dbf_view_header,
497         .format_proc = zfcp_dbf_rec_view_format,
498 };
499
500 /**
501  * zfcp_dbf_rec_thread - trace event related to recovery thread operation
502  * @id2: identifier for event
503  * @dbf: reference to dbf structure
504  * This function assumes that the caller is holding erp_lock.
505  */
506 void zfcp_dbf_rec_thread(char *id2, struct zfcp_dbf *dbf)
507 {
508         struct zfcp_adapter *adapter = dbf->adapter;
509         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
510         unsigned long flags = 0;
511         struct list_head *entry;
512         unsigned ready = 0, running = 0, total;
513
514         list_for_each(entry, &adapter->erp_ready_head)
515                 ready++;
516         list_for_each(entry, &adapter->erp_running_head)
517                 running++;
518         total = adapter->erp_total_count;
519
520         spin_lock_irqsave(&dbf->rec_lock, flags);
521         memset(r, 0, sizeof(*r));
522         r->id = ZFCP_REC_DBF_ID_THREAD;
523         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
524         r->u.thread.total = total;
525         r->u.thread.ready = ready;
526         r->u.thread.running = running;
527         debug_event(dbf->rec, 6, r, sizeof(*r));
528         spin_unlock_irqrestore(&dbf->rec_lock, flags);
529 }
530
531 /**
532  * zfcp_dbf_rec_thread - trace event related to recovery thread operation
533  * @id2: identifier for event
534  * @adapter: adapter
535  * This function assumes that the caller does not hold erp_lock.
536  */
537 void zfcp_dbf_rec_thread_lock(char *id2, struct zfcp_dbf *dbf)
538 {
539         struct zfcp_adapter *adapter = dbf->adapter;
540         unsigned long flags;
541
542         read_lock_irqsave(&adapter->erp_lock, flags);
543         zfcp_dbf_rec_thread(id2, dbf);
544         read_unlock_irqrestore(&adapter->erp_lock, flags);
545 }
546
547 static void zfcp_dbf_rec_target(char *id2, void *ref, struct zfcp_dbf *dbf,
548                                 atomic_t *status, atomic_t *erp_count, u64 wwpn,
549                                 u32 d_id, u64 fcp_lun)
550 {
551         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
552         unsigned long flags;
553
554         spin_lock_irqsave(&dbf->rec_lock, flags);
555         memset(r, 0, sizeof(*r));
556         r->id = ZFCP_REC_DBF_ID_TARGET;
557         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
558         r->u.target.ref = (unsigned long)ref;
559         r->u.target.status = atomic_read(status);
560         r->u.target.wwpn = wwpn;
561         r->u.target.d_id = d_id;
562         r->u.target.fcp_lun = fcp_lun;
563         r->u.target.erp_count = atomic_read(erp_count);
564         debug_event(dbf->rec, 3, r, sizeof(*r));
565         spin_unlock_irqrestore(&dbf->rec_lock, flags);
566 }
567
568 /**
569  * zfcp_dbf_rec_adapter - trace event for adapter state change
570  * @id: identifier for trigger of state change
571  * @ref: additional reference (e.g. request)
572  * @dbf: reference to dbf structure
573  */
574 void zfcp_dbf_rec_adapter(char *id, void *ref, struct zfcp_dbf *dbf)
575 {
576         struct zfcp_adapter *adapter = dbf->adapter;
577
578         zfcp_dbf_rec_target(id, ref, dbf, &adapter->status,
579                                   &adapter->erp_counter, 0, 0, 0);
580 }
581
582 /**
583  * zfcp_dbf_rec_port - trace event for port state change
584  * @id: identifier for trigger of state change
585  * @ref: additional reference (e.g. request)
586  * @port: port
587  */
588 void zfcp_dbf_rec_port(char *id, void *ref, struct zfcp_port *port)
589 {
590         struct zfcp_dbf *dbf = port->adapter->dbf;
591
592         zfcp_dbf_rec_target(id, ref, dbf, &port->status,
593                                   &port->erp_counter, port->wwpn, port->d_id,
594                                   0);
595 }
596
597 /**
598  * zfcp_dbf_rec_unit - trace event for unit state change
599  * @id: identifier for trigger of state change
600  * @ref: additional reference (e.g. request)
601  * @unit: unit
602  */
603 void zfcp_dbf_rec_unit(char *id, void *ref, struct zfcp_unit *unit)
604 {
605         struct zfcp_port *port = unit->port;
606         struct zfcp_dbf *dbf = port->adapter->dbf;
607
608         zfcp_dbf_rec_target(id, ref, dbf, &unit->status,
609                                   &unit->erp_counter, port->wwpn, port->d_id,
610                                   unit->fcp_lun);
611 }
612
613 /**
614  * zfcp_dbf_rec_trigger - trace event for triggered error recovery
615  * @id2: identifier for error recovery trigger
616  * @ref: additional reference (e.g. request)
617  * @want: originally requested error recovery action
618  * @need: error recovery action actually initiated
619  * @action: address of error recovery action struct
620  * @adapter: adapter
621  * @port: port
622  * @unit: unit
623  */
624 void zfcp_dbf_rec_trigger(char *id2, void *ref, u8 want, u8 need, void *action,
625                           struct zfcp_adapter *adapter, struct zfcp_port *port,
626                           struct zfcp_unit *unit)
627 {
628         struct zfcp_dbf *dbf = adapter->dbf;
629         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
630         unsigned long flags;
631
632         spin_lock_irqsave(&dbf->rec_lock, flags);
633         memset(r, 0, sizeof(*r));
634         r->id = ZFCP_REC_DBF_ID_TRIGGER;
635         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
636         r->u.trigger.ref = (unsigned long)ref;
637         r->u.trigger.want = want;
638         r->u.trigger.need = need;
639         r->u.trigger.action = (unsigned long)action;
640         r->u.trigger.as = atomic_read(&adapter->status);
641         if (port) {
642                 r->u.trigger.ps = atomic_read(&port->status);
643                 r->u.trigger.wwpn = port->wwpn;
644         }
645         if (unit) {
646                 r->u.trigger.us = atomic_read(&unit->status);
647                 r->u.trigger.fcp_lun = unit->fcp_lun;
648         }
649         debug_event(dbf->rec, action ? 1 : 4, r, sizeof(*r));
650         spin_unlock_irqrestore(&dbf->rec_lock, flags);
651 }
652
653 /**
654  * zfcp_dbf_rec_action - trace event showing progress of recovery action
655  * @id2: identifier
656  * @erp_action: error recovery action struct pointer
657  */
658 void zfcp_dbf_rec_action(char *id2, struct zfcp_erp_action *erp_action)
659 {
660         struct zfcp_dbf *dbf = erp_action->adapter->dbf;
661         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
662         unsigned long flags;
663
664         spin_lock_irqsave(&dbf->rec_lock, flags);
665         memset(r, 0, sizeof(*r));
666         r->id = ZFCP_REC_DBF_ID_ACTION;
667         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
668         r->u.action.action = (unsigned long)erp_action;
669         r->u.action.status = erp_action->status;
670         r->u.action.step = erp_action->step;
671         r->u.action.fsf_req = (unsigned long)erp_action->fsf_req;
672         debug_event(dbf->rec, 5, r, sizeof(*r));
673         spin_unlock_irqrestore(&dbf->rec_lock, flags);
674 }
675
676 /**
677  * zfcp_dbf_san_ct_request - trace event for issued CT request
678  * @fsf_req: request containing issued CT data
679  * @d_id: destination id where ct request is sent to
680  */
681 void zfcp_dbf_san_ct_request(struct zfcp_fsf_req *fsf_req, u32 d_id)
682 {
683         struct zfcp_fsf_ct_els *ct = (struct zfcp_fsf_ct_els *)fsf_req->data;
684         struct zfcp_adapter *adapter = fsf_req->adapter;
685         struct zfcp_dbf *dbf = adapter->dbf;
686         struct fc_ct_hdr *hdr = sg_virt(ct->req);
687         struct zfcp_dbf_san_record *r = &dbf->san_buf;
688         struct zfcp_dbf_san_record_ct_request *oct = &r->u.ct_req;
689         int level = 3;
690         unsigned long flags;
691
692         spin_lock_irqsave(&dbf->san_lock, flags);
693         memset(r, 0, sizeof(*r));
694         strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
695         r->fsf_reqid = fsf_req->req_id;
696         r->fsf_seqno = fsf_req->seq_no;
697         oct->d_id = d_id;
698         oct->cmd_req_code = hdr->ct_cmd;
699         oct->revision = hdr->ct_rev;
700         oct->gs_type = hdr->ct_fs_type;
701         oct->gs_subtype = hdr->ct_fs_subtype;
702         oct->options = hdr->ct_options;
703         oct->max_res_size = hdr->ct_mr_size;
704         oct->len = min((int)ct->req->length - (int)sizeof(struct fc_ct_hdr),
705                        ZFCP_DBF_SAN_MAX_PAYLOAD);
706         debug_event(dbf->san, level, r, sizeof(*r));
707         zfcp_dbf_hexdump(dbf->san, r, sizeof(*r), level,
708                          (void *)hdr + sizeof(struct fc_ct_hdr), oct->len);
709         spin_unlock_irqrestore(&dbf->san_lock, flags);
710 }
711
712 /**
713  * zfcp_dbf_san_ct_response - trace event for completion of CT request
714  * @fsf_req: request containing CT response
715  */
716 void zfcp_dbf_san_ct_response(struct zfcp_fsf_req *fsf_req)
717 {
718         struct zfcp_fsf_ct_els *ct = (struct zfcp_fsf_ct_els *)fsf_req->data;
719         struct zfcp_adapter *adapter = fsf_req->adapter;
720         struct fc_ct_hdr *hdr = sg_virt(ct->resp);
721         struct zfcp_dbf *dbf = adapter->dbf;
722         struct zfcp_dbf_san_record *r = &dbf->san_buf;
723         struct zfcp_dbf_san_record_ct_response *rct = &r->u.ct_resp;
724         int level = 3;
725         unsigned long flags;
726
727         spin_lock_irqsave(&dbf->san_lock, flags);
728         memset(r, 0, sizeof(*r));
729         strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
730         r->fsf_reqid = fsf_req->req_id;
731         r->fsf_seqno = fsf_req->seq_no;
732         rct->cmd_rsp_code = hdr->ct_cmd;
733         rct->revision = hdr->ct_rev;
734         rct->reason_code = hdr->ct_reason;
735         rct->expl = hdr->ct_explan;
736         rct->vendor_unique = hdr->ct_vendor;
737         rct->max_res_size = hdr->ct_mr_size;
738         rct->len = min((int)ct->resp->length - (int)sizeof(struct fc_ct_hdr),
739                        ZFCP_DBF_SAN_MAX_PAYLOAD);
740         debug_event(dbf->san, level, r, sizeof(*r));
741         zfcp_dbf_hexdump(dbf->san, r, sizeof(*r), level,
742                          (void *)hdr + sizeof(struct fc_ct_hdr), rct->len);
743         spin_unlock_irqrestore(&dbf->san_lock, flags);
744 }
745
746 static void zfcp_dbf_san_els(const char *tag, int level,
747                              struct zfcp_fsf_req *fsf_req, u32 d_id,
748                              void *buffer, int buflen)
749 {
750         struct zfcp_adapter *adapter = fsf_req->adapter;
751         struct zfcp_dbf *dbf = adapter->dbf;
752         struct zfcp_dbf_san_record *rec = &dbf->san_buf;
753         unsigned long flags;
754
755         spin_lock_irqsave(&dbf->san_lock, flags);
756         memset(rec, 0, sizeof(*rec));
757         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
758         rec->fsf_reqid = fsf_req->req_id;
759         rec->fsf_seqno = fsf_req->seq_no;
760         rec->u.els.d_id = d_id;
761         debug_event(dbf->san, level, rec, sizeof(*rec));
762         zfcp_dbf_hexdump(dbf->san, rec, sizeof(*rec), level,
763                          buffer, min(buflen, ZFCP_DBF_SAN_MAX_PAYLOAD));
764         spin_unlock_irqrestore(&dbf->san_lock, flags);
765 }
766
767 /**
768  * zfcp_dbf_san_els_request - trace event for issued ELS
769  * @fsf_req: request containing issued ELS
770  */
771 void zfcp_dbf_san_els_request(struct zfcp_fsf_req *fsf_req)
772 {
773         struct zfcp_fsf_ct_els *els = (struct zfcp_fsf_ct_els *)fsf_req->data;
774         u32 d_id = ntoh24(fsf_req->qtcb->bottom.support.d_id);
775
776         zfcp_dbf_san_els("oels", 2, fsf_req, d_id,
777                          sg_virt(els->req), els->req->length);
778 }
779
780 /**
781  * zfcp_dbf_san_els_response - trace event for completed ELS
782  * @fsf_req: request containing ELS response
783  */
784 void zfcp_dbf_san_els_response(struct zfcp_fsf_req *fsf_req)
785 {
786         struct zfcp_fsf_ct_els *els = (struct zfcp_fsf_ct_els *)fsf_req->data;
787         u32 d_id = ntoh24(fsf_req->qtcb->bottom.support.d_id);
788
789         zfcp_dbf_san_els("rels", 2, fsf_req, d_id,
790                                sg_virt(els->resp), els->resp->length);
791 }
792
793 /**
794  * zfcp_dbf_san_incoming_els - trace event for incomig ELS
795  * @fsf_req: request containing unsolicited status buffer with incoming ELS
796  */
797 void zfcp_dbf_san_incoming_els(struct zfcp_fsf_req *fsf_req)
798 {
799         struct fsf_status_read_buffer *buf =
800                         (struct fsf_status_read_buffer *)fsf_req->data;
801         int length = (int)buf->length -
802                      (int)((void *)&buf->payload - (void *)buf);
803
804         zfcp_dbf_san_els("iels", 1, fsf_req, ntoh24(buf->d_id),
805                                (void *)buf->payload.data, length);
806 }
807
808 static int zfcp_dbf_san_view_format(debug_info_t *id, struct debug_view *view,
809                                     char *out_buf, const char *in_buf)
810 {
811         struct zfcp_dbf_san_record *r = (struct zfcp_dbf_san_record *)in_buf;
812         char *p = out_buf;
813
814         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
815                 return 0;
816
817         zfcp_dbf_tag(&p, "tag", r->tag);
818         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
819         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
820
821         if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
822                 struct zfcp_dbf_san_record_ct_request *ct = &r->u.ct_req;
823                 zfcp_dbf_out(&p, "d_id", "0x%06x", ct->d_id);
824                 zfcp_dbf_out(&p, "cmd_req_code", "0x%04x", ct->cmd_req_code);
825                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
826                 zfcp_dbf_out(&p, "gs_type", "0x%02x", ct->gs_type);
827                 zfcp_dbf_out(&p, "gs_subtype", "0x%02x", ct->gs_subtype);
828                 zfcp_dbf_out(&p, "options", "0x%02x", ct->options);
829                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
830         } else if (strncmp(r->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
831                 struct zfcp_dbf_san_record_ct_response *ct = &r->u.ct_resp;
832                 zfcp_dbf_out(&p, "cmd_rsp_code", "0x%04x", ct->cmd_rsp_code);
833                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
834                 zfcp_dbf_out(&p, "reason_code", "0x%02x", ct->reason_code);
835                 zfcp_dbf_out(&p, "reason_code_expl", "0x%02x", ct->expl);
836                 zfcp_dbf_out(&p, "vendor_unique", "0x%02x", ct->vendor_unique);
837                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
838         } else if (strncmp(r->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
839                    strncmp(r->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
840                    strncmp(r->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
841                 struct zfcp_dbf_san_record_els *els = &r->u.els;
842                 zfcp_dbf_out(&p, "d_id", "0x%06x", els->d_id);
843         }
844         return p - out_buf;
845 }
846
847 static struct debug_view zfcp_dbf_san_view = {
848         .name = "structured",
849         .header_proc = zfcp_dbf_view_header,
850         .format_proc = zfcp_dbf_san_view_format,
851 };
852
853 void _zfcp_dbf_scsi(const char *tag, const char *tag2, int level,
854                     struct zfcp_dbf *dbf, struct scsi_cmnd *scsi_cmnd,
855                     struct zfcp_fsf_req *fsf_req, unsigned long old_req_id)
856 {
857         struct zfcp_dbf_scsi_record *rec = &dbf->scsi_buf;
858         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
859         unsigned long flags;
860         struct fcp_resp_with_ext *fcp_rsp;
861         struct fcp_resp_rsp_info *fcp_rsp_info = NULL;
862         char *fcp_sns_info = NULL;
863         int offset = 0, buflen = 0;
864
865         spin_lock_irqsave(&dbf->scsi_lock, flags);
866         do {
867                 memset(rec, 0, sizeof(*rec));
868                 if (offset == 0) {
869                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
870                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
871                         if (scsi_cmnd != NULL) {
872                                 if (scsi_cmnd->device) {
873                                         rec->scsi_id = scsi_cmnd->device->id;
874                                         rec->scsi_lun = scsi_cmnd->device->lun;
875                                 }
876                                 rec->scsi_result = scsi_cmnd->result;
877                                 rec->scsi_cmnd = (unsigned long)scsi_cmnd;
878                                 rec->scsi_serial = scsi_cmnd->serial_number;
879                                 memcpy(rec->scsi_opcode, scsi_cmnd->cmnd,
880                                         min((int)scsi_cmnd->cmd_len,
881                                                 ZFCP_DBF_SCSI_OPCODE));
882                                 rec->scsi_retries = scsi_cmnd->retries;
883                                 rec->scsi_allowed = scsi_cmnd->allowed;
884                         }
885                         if (fsf_req != NULL) {
886                                 fcp_rsp = (struct fcp_resp_with_ext *)
887                                         &(fsf_req->qtcb->bottom.io.fcp_rsp);
888                                 fcp_rsp_info = (struct fcp_resp_rsp_info *)
889                                         &fcp_rsp[1];
890                                 fcp_sns_info = (char *) &fcp_rsp[1];
891                                 if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL)
892                                         fcp_sns_info += fcp_rsp->ext.fr_sns_len;
893
894                                 rec->rsp_validity = fcp_rsp->resp.fr_flags;
895                                 rec->rsp_scsi_status = fcp_rsp->resp.fr_status;
896                                 rec->rsp_resid = fcp_rsp->ext.fr_resid;
897                                 if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL)
898                                         rec->rsp_code = fcp_rsp_info->rsp_code;
899                                 if (fcp_rsp->resp.fr_flags & FCP_SNS_LEN_VAL) {
900                                         buflen = min(fcp_rsp->ext.fr_sns_len,
901                                            (u32)ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
902                                         rec->sns_info_len = buflen;
903                                         memcpy(rec->sns_info, fcp_sns_info,
904                                                min(buflen,
905                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
906                                         offset += min(buflen,
907                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
908                                 }
909
910                                 rec->fsf_reqid = fsf_req->req_id;
911                                 rec->fsf_seqno = fsf_req->seq_no;
912                                 rec->fsf_issued = fsf_req->issued;
913                         }
914                         rec->old_fsf_reqid = old_req_id;
915                 } else {
916                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
917                         dump->total_size = buflen;
918                         dump->offset = offset;
919                         dump->size = min(buflen - offset,
920                                          (int)sizeof(struct
921                                                      zfcp_dbf_scsi_record) -
922                                          (int)sizeof(struct zfcp_dbf_dump));
923                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
924                         offset += dump->size;
925                 }
926                 debug_event(dbf->scsi, level, rec, sizeof(*rec));
927         } while (offset < buflen);
928         spin_unlock_irqrestore(&dbf->scsi_lock, flags);
929 }
930
931 static int zfcp_dbf_scsi_view_format(debug_info_t *id, struct debug_view *view,
932                                      char *out_buf, const char *in_buf)
933 {
934         struct zfcp_dbf_scsi_record *r = (struct zfcp_dbf_scsi_record *)in_buf;
935         struct timespec t;
936         char *p = out_buf;
937
938         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
939                 return 0;
940
941         zfcp_dbf_tag(&p, "tag", r->tag);
942         zfcp_dbf_tag(&p, "tag2", r->tag2);
943         zfcp_dbf_out(&p, "scsi_id", "0x%08x", r->scsi_id);
944         zfcp_dbf_out(&p, "scsi_lun", "0x%08x", r->scsi_lun);
945         zfcp_dbf_out(&p, "scsi_result", "0x%08x", r->scsi_result);
946         zfcp_dbf_out(&p, "scsi_cmnd", "0x%0Lx", r->scsi_cmnd);
947         zfcp_dbf_out(&p, "scsi_serial", "0x%016Lx", r->scsi_serial);
948         zfcp_dbf_outd(&p, "scsi_opcode", r->scsi_opcode, ZFCP_DBF_SCSI_OPCODE,
949                       0, ZFCP_DBF_SCSI_OPCODE);
950         zfcp_dbf_out(&p, "scsi_retries", "0x%02x", r->scsi_retries);
951         zfcp_dbf_out(&p, "scsi_allowed", "0x%02x", r->scsi_allowed);
952         if (strncmp(r->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0)
953                 zfcp_dbf_out(&p, "old_fsf_reqid", "0x%0Lx", r->old_fsf_reqid);
954         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
955         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
956         stck_to_timespec(r->fsf_issued, &t);
957         zfcp_dbf_out(&p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
958
959         if (strncmp(r->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
960                 zfcp_dbf_out(&p, "fcp_rsp_validity", "0x%02x", r->rsp_validity);
961                 zfcp_dbf_out(&p, "fcp_rsp_scsi_status", "0x%02x",
962                              r->rsp_scsi_status);
963                 zfcp_dbf_out(&p, "fcp_rsp_resid", "0x%08x", r->rsp_resid);
964                 zfcp_dbf_out(&p, "fcp_rsp_code", "0x%08x", r->rsp_code);
965                 zfcp_dbf_out(&p, "fcp_sns_info_len", "0x%08x", r->sns_info_len);
966                 zfcp_dbf_outd(&p, "fcp_sns_info", r->sns_info,
967                               min((int)r->sns_info_len,
968                               ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
969                               r->sns_info_len);
970         }
971         p += sprintf(p, "\n");
972         return p - out_buf;
973 }
974
975 static struct debug_view zfcp_dbf_scsi_view = {
976         .name = "structured",
977         .header_proc = zfcp_dbf_view_header,
978         .format_proc = zfcp_dbf_scsi_view_format,
979 };
980
981 static debug_info_t *zfcp_dbf_reg(const char *name, int level,
982                                   struct debug_view *view, int size)
983 {
984         struct debug_info *d;
985
986         d = debug_register(name, dbfsize, level, size);
987         if (!d)
988                 return NULL;
989
990         debug_register_view(d, &debug_hex_ascii_view);
991         debug_register_view(d, view);
992         debug_set_level(d, level);
993
994         return d;
995 }
996
997 /**
998  * zfcp_adapter_debug_register - registers debug feature for an adapter
999  * @adapter: pointer to adapter for which debug features should be registered
1000  * return: -ENOMEM on error, 0 otherwise
1001  */
1002 int zfcp_dbf_adapter_register(struct zfcp_adapter *adapter)
1003 {
1004         char dbf_name[DEBUG_MAX_NAME_LEN];
1005         struct zfcp_dbf *dbf;
1006
1007         dbf = kmalloc(sizeof(struct zfcp_dbf), GFP_KERNEL);
1008         if (!dbf)
1009                 return -ENOMEM;
1010
1011         dbf->adapter = adapter;
1012
1013         spin_lock_init(&dbf->hba_lock);
1014         spin_lock_init(&dbf->san_lock);
1015         spin_lock_init(&dbf->scsi_lock);
1016         spin_lock_init(&dbf->rec_lock);
1017
1018         /* debug feature area which records recovery activity */
1019         sprintf(dbf_name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev));
1020         dbf->rec = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_rec_view,
1021                                 sizeof(struct zfcp_dbf_rec_record));
1022         if (!dbf->rec)
1023                 goto err_out;
1024
1025         /* debug feature area which records HBA (FSF and QDIO) conditions */
1026         sprintf(dbf_name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev));
1027         dbf->hba = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_hba_view,
1028                                 sizeof(struct zfcp_dbf_hba_record));
1029         if (!dbf->hba)
1030                 goto err_out;
1031
1032         /* debug feature area which records SAN command failures and recovery */
1033         sprintf(dbf_name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev));
1034         dbf->san = zfcp_dbf_reg(dbf_name, 6, &zfcp_dbf_san_view,
1035                                 sizeof(struct zfcp_dbf_san_record));
1036         if (!dbf->san)
1037                 goto err_out;
1038
1039         /* debug feature area which records SCSI command failures and recovery */
1040         sprintf(dbf_name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev));
1041         dbf->scsi = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_scsi_view,
1042                                  sizeof(struct zfcp_dbf_scsi_record));
1043         if (!dbf->scsi)
1044                 goto err_out;
1045
1046         adapter->dbf = dbf;
1047         return 0;
1048
1049 err_out:
1050         zfcp_dbf_adapter_unregister(dbf);
1051         return -ENOMEM;
1052 }
1053
1054 /**
1055  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
1056  * @dbf: pointer to dbf for which debug features should be unregistered
1057  */
1058 void zfcp_dbf_adapter_unregister(struct zfcp_dbf *dbf)
1059 {
1060         if (!dbf)
1061                 return;
1062         debug_unregister(dbf->scsi);
1063         debug_unregister(dbf->san);
1064         debug_unregister(dbf->hba);
1065         debug_unregister(dbf->rec);
1066         dbf->adapter->dbf = NULL;
1067         kfree(dbf);
1068 }
1069