[SCSI] zfcp: Remove unnecessary warning message
[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, 2008
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_ext.h"
15
16 static u32 dbfsize = 4;
17
18 module_param(dbfsize, uint, 0400);
19 MODULE_PARM_DESC(dbfsize,
20                  "number of pages for each debug feature area (default 4)");
21
22 static void zfcp_dbf_hexdump(debug_info_t *dbf, void *to, int to_len,
23                              int level, char *from, int from_len)
24 {
25         int offset;
26         struct zfcp_dbf_dump *dump = to;
27         int room = to_len - sizeof(*dump);
28
29         for (offset = 0; offset < from_len; offset += dump->size) {
30                 memset(to, 0, to_len);
31                 strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
32                 dump->total_size = from_len;
33                 dump->offset = offset;
34                 dump->size = min(from_len - offset, room);
35                 memcpy(dump->data, from + offset, dump->size);
36                 debug_event(dbf, level, dump, dump->size + sizeof(*dump));
37         }
38 }
39
40 /* FIXME: this duplicate this code in s390 debug feature */
41 static void zfcp_dbf_timestamp(unsigned long long stck, struct timespec *time)
42 {
43         unsigned long long sec;
44
45         stck -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
46         sec = stck >> 12;
47         do_div(sec, 1000000);
48         time->tv_sec = sec;
49         stck -= (sec * 1000000) << 12;
50         time->tv_nsec = ((stck * 1000) >> 12);
51 }
52
53 static void zfcp_dbf_tag(char **p, const char *label, const char *tag)
54 {
55         int i;
56
57         *p += sprintf(*p, "%-24s", label);
58         for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
59                 *p += sprintf(*p, "%c", tag[i]);
60         *p += sprintf(*p, "\n");
61 }
62
63 static void zfcp_dbf_outs(char **buf, const char *s1, const char *s2)
64 {
65         *buf += sprintf(*buf, "%-24s%s\n", s1, s2);
66 }
67
68 static void zfcp_dbf_out(char **buf, const char *s, const char *format, ...)
69 {
70         va_list arg;
71
72         *buf += sprintf(*buf, "%-24s", s);
73         va_start(arg, format);
74         *buf += vsprintf(*buf, format, arg);
75         va_end(arg);
76         *buf += sprintf(*buf, "\n");
77 }
78
79 static void zfcp_dbf_outd(char **p, const char *label, char *buffer,
80                           int buflen, int offset, int total_size)
81 {
82         if (!offset)
83                 *p += sprintf(*p, "%-24s  ", label);
84         while (buflen--) {
85                 if (offset > 0) {
86                         if ((offset % 32) == 0)
87                                 *p += sprintf(*p, "\n%-24c  ", ' ');
88                         else if ((offset % 4) == 0)
89                                 *p += sprintf(*p, " ");
90                 }
91                 *p += sprintf(*p, "%02x", *buffer++);
92                 if (++offset == total_size) {
93                         *p += sprintf(*p, "\n");
94                         break;
95                 }
96         }
97         if (!total_size)
98                 *p += sprintf(*p, "\n");
99 }
100
101 static int zfcp_dbf_view_header(debug_info_t *id, struct debug_view *view,
102                                 int area, debug_entry_t *entry, char *out_buf)
103 {
104         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
105         struct timespec t;
106         char *p = out_buf;
107
108         if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
109                 zfcp_dbf_timestamp(entry->id.stck, &t);
110                 zfcp_dbf_out(&p, "timestamp", "%011lu:%06lu",
111                              t.tv_sec, t.tv_nsec);
112                 zfcp_dbf_out(&p, "cpu", "%02i", entry->id.fields.cpuid);
113         } else  {
114                 zfcp_dbf_outd(&p, "", dump->data, dump->size, dump->offset,
115                               dump->total_size);
116                 if ((dump->offset + dump->size) == dump->total_size)
117                         p += sprintf(p, "\n");
118         }
119         return p - out_buf;
120 }
121
122 /**
123  * zfcp_hba_dbf_event_fsf_response - trace event for request completion
124  * @fsf_req: request that has been completed
125  */
126 void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
127 {
128         struct zfcp_adapter *adapter = fsf_req->adapter;
129         struct fsf_qtcb *qtcb = fsf_req->qtcb;
130         union fsf_prot_status_qual *prot_status_qual =
131                                         &qtcb->prefix.prot_status_qual;
132         union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
133         struct scsi_cmnd *scsi_cmnd;
134         struct zfcp_port *port;
135         struct zfcp_unit *unit;
136         struct zfcp_send_els *send_els;
137         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
138         struct zfcp_hba_dbf_record_response *response = &rec->u.response;
139         int level;
140         unsigned long flags;
141
142         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
143         memset(rec, 0, sizeof(*rec));
144         strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
145
146         if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
147             (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
148                 strncpy(rec->tag2, "perr", ZFCP_DBF_TAG_SIZE);
149                 level = 1;
150         } else if (qtcb->header.fsf_status != FSF_GOOD) {
151                 strncpy(rec->tag2, "ferr", ZFCP_DBF_TAG_SIZE);
152                 level = 1;
153         } else if ((fsf_req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
154                    (fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) {
155                 strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE);
156                 level = 4;
157         } else if (qtcb->header.log_length) {
158                 strncpy(rec->tag2, "qtcb", ZFCP_DBF_TAG_SIZE);
159                 level = 5;
160         } else {
161                 strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE);
162                 level = 6;
163         }
164
165         response->fsf_command = fsf_req->fsf_command;
166         response->fsf_reqid = (unsigned long)fsf_req;
167         response->fsf_seqno = fsf_req->seq_no;
168         response->fsf_issued = fsf_req->issued;
169         response->fsf_prot_status = qtcb->prefix.prot_status;
170         response->fsf_status = qtcb->header.fsf_status;
171         memcpy(response->fsf_prot_status_qual,
172                prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
173         memcpy(response->fsf_status_qual,
174                fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
175         response->fsf_req_status = fsf_req->status;
176         response->sbal_first = fsf_req->sbal_first;
177         response->sbal_last = fsf_req->sbal_last;
178         response->sbal_response = fsf_req->sbal_response;
179         response->pool = fsf_req->pool != NULL;
180         response->erp_action = (unsigned long)fsf_req->erp_action;
181
182         switch (fsf_req->fsf_command) {
183         case FSF_QTCB_FCP_CMND:
184                 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
185                         break;
186                 scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
187                 if (scsi_cmnd) {
188                         response->u.fcp.cmnd = (unsigned long)scsi_cmnd;
189                         response->u.fcp.serial = scsi_cmnd->serial_number;
190                 }
191                 break;
192
193         case FSF_QTCB_OPEN_PORT_WITH_DID:
194         case FSF_QTCB_CLOSE_PORT:
195         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
196                 port = (struct zfcp_port *)fsf_req->data;
197                 response->u.port.wwpn = port->wwpn;
198                 response->u.port.d_id = port->d_id;
199                 response->u.port.port_handle = qtcb->header.port_handle;
200                 break;
201
202         case FSF_QTCB_OPEN_LUN:
203         case FSF_QTCB_CLOSE_LUN:
204                 unit = (struct zfcp_unit *)fsf_req->data;
205                 port = unit->port;
206                 response->u.unit.wwpn = port->wwpn;
207                 response->u.unit.fcp_lun = unit->fcp_lun;
208                 response->u.unit.port_handle = qtcb->header.port_handle;
209                 response->u.unit.lun_handle = qtcb->header.lun_handle;
210                 break;
211
212         case FSF_QTCB_SEND_ELS:
213                 send_els = (struct zfcp_send_els *)fsf_req->data;
214                 response->u.els.d_id = qtcb->bottom.support.d_id;
215                 response->u.els.ls_code = send_els->ls_code >> 24;
216                 break;
217
218         case FSF_QTCB_ABORT_FCP_CMND:
219         case FSF_QTCB_SEND_GENERIC:
220         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
221         case FSF_QTCB_EXCHANGE_PORT_DATA:
222         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
223         case FSF_QTCB_UPLOAD_CONTROL_FILE:
224                 break;
225         }
226
227         debug_event(adapter->hba_dbf, level, rec, sizeof(*rec));
228
229         /* have fcp channel microcode fixed to use as little as possible */
230         if (fsf_req->fsf_command != FSF_QTCB_FCP_CMND) {
231                 /* adjust length skipping trailing zeros */
232                 char *buf = (char *)qtcb + qtcb->header.log_start;
233                 int len = qtcb->header.log_length;
234                 for (; len && !buf[len - 1]; len--);
235                 zfcp_dbf_hexdump(adapter->hba_dbf, rec, sizeof(*rec), level,
236                                  buf, len);
237         }
238
239         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
240 }
241
242 /**
243  * zfcp_hba_dbf_event_fsf_unsol - trace event for an unsolicited status buffer
244  * @tag: tag indicating which kind of unsolicited status has been received
245  * @adapter: adapter that has issued the unsolicited status buffer
246  * @status_buffer: buffer containing payload of unsolicited status
247  */
248 void zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
249                                   struct fsf_status_read_buffer *status_buffer)
250 {
251         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
252         unsigned long flags;
253
254         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
255         memset(rec, 0, sizeof(*rec));
256         strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
257         strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
258
259         rec->u.status.failed = atomic_read(&adapter->stat_miss);
260         if (status_buffer != NULL) {
261                 rec->u.status.status_type = status_buffer->status_type;
262                 rec->u.status.status_subtype = status_buffer->status_subtype;
263                 memcpy(&rec->u.status.queue_designator,
264                        &status_buffer->queue_designator,
265                        sizeof(struct fsf_queue_designator));
266
267                 switch (status_buffer->status_type) {
268                 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
269                         rec->u.status.payload_size =
270                             ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
271                         break;
272
273                 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
274                         rec->u.status.payload_size =
275                             ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
276                         break;
277
278                 case FSF_STATUS_READ_LINK_DOWN:
279                         switch (status_buffer->status_subtype) {
280                         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
281                         case FSF_STATUS_READ_SUB_FDISC_FAILED:
282                                 rec->u.status.payload_size =
283                                         sizeof(struct fsf_link_down_info);
284                         }
285                         break;
286
287                 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
288                         rec->u.status.payload_size =
289                             ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
290                         break;
291                 }
292                 memcpy(&rec->u.status.payload,
293                        &status_buffer->payload, rec->u.status.payload_size);
294         }
295
296         debug_event(adapter->hba_dbf, 2, rec, sizeof(*rec));
297         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
298 }
299
300 /**
301  * zfcp_hba_dbf_event_qdio - trace event for QDIO related failure
302  * @adapter: adapter affected by this QDIO related event
303  * @qdio_error: as passed by qdio module
304  * @sbal_index: first buffer with error condition, as passed by qdio module
305  * @sbal_count: number of buffers affected, as passed by qdio module
306  */
307 void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter,
308                              unsigned int qdio_error, int sbal_index,
309                              int sbal_count)
310 {
311         struct zfcp_hba_dbf_record *r = &adapter->hba_dbf_buf;
312         unsigned long flags;
313
314         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
315         memset(r, 0, sizeof(*r));
316         strncpy(r->tag, "qdio", ZFCP_DBF_TAG_SIZE);
317         r->u.qdio.qdio_error = qdio_error;
318         r->u.qdio.sbal_index = sbal_index;
319         r->u.qdio.sbal_count = sbal_count;
320         debug_event(adapter->hba_dbf, 0, r, sizeof(*r));
321         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
322 }
323
324 /**
325  * zfcp_hba_dbf_event_berr - trace event for bit error threshold
326  * @adapter: adapter affected by this QDIO related event
327  * @req: fsf request
328  */
329 void zfcp_hba_dbf_event_berr(struct zfcp_adapter *adapter,
330                              struct zfcp_fsf_req *req)
331 {
332         struct zfcp_hba_dbf_record *r = &adapter->hba_dbf_buf;
333         struct fsf_status_read_buffer *sr_buf = req->data;
334         struct fsf_bit_error_payload *err = &sr_buf->payload.bit_error;
335         unsigned long flags;
336
337         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
338         memset(r, 0, sizeof(*r));
339         strncpy(r->tag, "berr", ZFCP_DBF_TAG_SIZE);
340         memcpy(&r->u.berr, err, sizeof(struct fsf_bit_error_payload));
341         debug_event(adapter->hba_dbf, 0, r, sizeof(*r));
342         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
343 }
344 static void zfcp_hba_dbf_view_response(char **p,
345                                        struct zfcp_hba_dbf_record_response *r)
346 {
347         struct timespec t;
348
349         zfcp_dbf_out(p, "fsf_command", "0x%08x", r->fsf_command);
350         zfcp_dbf_out(p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
351         zfcp_dbf_out(p, "fsf_seqno", "0x%08x", r->fsf_seqno);
352         zfcp_dbf_timestamp(r->fsf_issued, &t);
353         zfcp_dbf_out(p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
354         zfcp_dbf_out(p, "fsf_prot_status", "0x%08x", r->fsf_prot_status);
355         zfcp_dbf_out(p, "fsf_status", "0x%08x", r->fsf_status);
356         zfcp_dbf_outd(p, "fsf_prot_status_qual", r->fsf_prot_status_qual,
357                       FSF_PROT_STATUS_QUAL_SIZE, 0, FSF_PROT_STATUS_QUAL_SIZE);
358         zfcp_dbf_outd(p, "fsf_status_qual", r->fsf_status_qual,
359                       FSF_STATUS_QUALIFIER_SIZE, 0, FSF_STATUS_QUALIFIER_SIZE);
360         zfcp_dbf_out(p, "fsf_req_status", "0x%08x", r->fsf_req_status);
361         zfcp_dbf_out(p, "sbal_first", "0x%02x", r->sbal_first);
362         zfcp_dbf_out(p, "sbal_last", "0x%02x", r->sbal_last);
363         zfcp_dbf_out(p, "sbal_response", "0x%02x", r->sbal_response);
364         zfcp_dbf_out(p, "pool", "0x%02x", r->pool);
365
366         switch (r->fsf_command) {
367         case FSF_QTCB_FCP_CMND:
368                 if (r->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
369                         break;
370                 zfcp_dbf_out(p, "scsi_cmnd", "0x%0Lx", r->u.fcp.cmnd);
371                 zfcp_dbf_out(p, "scsi_serial", "0x%016Lx", r->u.fcp.serial);
372                 p += sprintf(*p, "\n");
373                 break;
374
375         case FSF_QTCB_OPEN_PORT_WITH_DID:
376         case FSF_QTCB_CLOSE_PORT:
377         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
378                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.port.wwpn);
379                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.port.d_id);
380                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.port.port_handle);
381                 break;
382
383         case FSF_QTCB_OPEN_LUN:
384         case FSF_QTCB_CLOSE_LUN:
385                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.unit.wwpn);
386                 zfcp_dbf_out(p, "fcp_lun", "0x%016Lx", r->u.unit.fcp_lun);
387                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.unit.port_handle);
388                 zfcp_dbf_out(p, "lun_handle", "0x%08x", r->u.unit.lun_handle);
389                 break;
390
391         case FSF_QTCB_SEND_ELS:
392                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.els.d_id);
393                 zfcp_dbf_out(p, "ls_code", "0x%02x", r->u.els.ls_code);
394                 break;
395
396         case FSF_QTCB_ABORT_FCP_CMND:
397         case FSF_QTCB_SEND_GENERIC:
398         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
399         case FSF_QTCB_EXCHANGE_PORT_DATA:
400         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
401         case FSF_QTCB_UPLOAD_CONTROL_FILE:
402                 break;
403         }
404 }
405
406 static void zfcp_hba_dbf_view_status(char **p,
407                                      struct zfcp_hba_dbf_record_status *r)
408 {
409         zfcp_dbf_out(p, "failed", "0x%02x", r->failed);
410         zfcp_dbf_out(p, "status_type", "0x%08x", r->status_type);
411         zfcp_dbf_out(p, "status_subtype", "0x%08x", r->status_subtype);
412         zfcp_dbf_outd(p, "queue_designator", (char *)&r->queue_designator,
413                       sizeof(struct fsf_queue_designator), 0,
414                       sizeof(struct fsf_queue_designator));
415         zfcp_dbf_outd(p, "payload", (char *)&r->payload, r->payload_size, 0,
416                       r->payload_size);
417 }
418
419 static void zfcp_hba_dbf_view_qdio(char **p, struct zfcp_hba_dbf_record_qdio *r)
420 {
421         zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
422         zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
423         zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
424 }
425
426 static void zfcp_hba_dbf_view_berr(char **p, struct fsf_bit_error_payload *r)
427 {
428         zfcp_dbf_out(p, "link_failures", "%d", r->link_failure_error_count);
429         zfcp_dbf_out(p, "loss_of_sync_err", "%d", r->loss_of_sync_error_count);
430         zfcp_dbf_out(p, "loss_of_sig_err", "%d", r->loss_of_signal_error_count);
431         zfcp_dbf_out(p, "prim_seq_err", "%d",
432                      r->primitive_sequence_error_count);
433         zfcp_dbf_out(p, "inval_trans_word_err", "%d",
434                      r->invalid_transmission_word_error_count);
435         zfcp_dbf_out(p, "CRC_errors", "%d", r->crc_error_count);
436         zfcp_dbf_out(p, "prim_seq_event_to", "%d",
437                      r->primitive_sequence_event_timeout_count);
438         zfcp_dbf_out(p, "elast_buf_overrun_err", "%d",
439                      r->elastic_buffer_overrun_error_count);
440         zfcp_dbf_out(p, "adv_rec_buf2buf_cred", "%d",
441                      r->advertised_receive_b2b_credit);
442         zfcp_dbf_out(p, "curr_rec_buf2buf_cred", "%d",
443                      r->current_receive_b2b_credit);
444         zfcp_dbf_out(p, "adv_trans_buf2buf_cred", "%d",
445                      r->advertised_transmit_b2b_credit);
446         zfcp_dbf_out(p, "curr_trans_buf2buf_cred", "%d",
447                      r->current_transmit_b2b_credit);
448 }
449
450 static int zfcp_hba_dbf_view_format(debug_info_t *id, struct debug_view *view,
451                                     char *out_buf, const char *in_buf)
452 {
453         struct zfcp_hba_dbf_record *r = (struct zfcp_hba_dbf_record *)in_buf;
454         char *p = out_buf;
455
456         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
457                 return 0;
458
459         zfcp_dbf_tag(&p, "tag", r->tag);
460         if (isalpha(r->tag2[0]))
461                 zfcp_dbf_tag(&p, "tag2", r->tag2);
462
463         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
464                 zfcp_hba_dbf_view_response(&p, &r->u.response);
465         else if (strncmp(r->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
466                 zfcp_hba_dbf_view_status(&p, &r->u.status);
467         else if (strncmp(r->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
468                 zfcp_hba_dbf_view_qdio(&p, &r->u.qdio);
469         else if (strncmp(r->tag, "berr", ZFCP_DBF_TAG_SIZE) == 0)
470                 zfcp_hba_dbf_view_berr(&p, &r->u.berr);
471
472         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) != 0)
473                 p += sprintf(p, "\n");
474         return p - out_buf;
475 }
476
477 static struct debug_view zfcp_hba_dbf_view = {
478         "structured",
479         NULL,
480         &zfcp_dbf_view_header,
481         &zfcp_hba_dbf_view_format,
482         NULL,
483         NULL
484 };
485
486 static const char *zfcp_rec_dbf_tags[] = {
487         [ZFCP_REC_DBF_ID_THREAD] = "thread",
488         [ZFCP_REC_DBF_ID_TARGET] = "target",
489         [ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
490         [ZFCP_REC_DBF_ID_ACTION] = "action",
491 };
492
493 static const char *zfcp_rec_dbf_ids[] = {
494         [1]     = "new",
495         [2]     = "ready",
496         [3]     = "kill",
497         [4]     = "down sleep",
498         [5]     = "down wakeup",
499         [6]     = "down sleep ecd",
500         [7]     = "down wakeup ecd",
501         [8]     = "down sleep epd",
502         [9]     = "down wakeup epd",
503         [10]    = "online",
504         [11]    = "operational",
505         [12]    = "scsi slave destroy",
506         [13]    = "propagate failed adapter",
507         [14]    = "propagate failed port",
508         [15]    = "block adapter",
509         [16]    = "unblock adapter",
510         [17]    = "block port",
511         [18]    = "unblock port",
512         [19]    = "block unit",
513         [20]    = "unblock unit",
514         [21]    = "unit recovery failed",
515         [22]    = "port recovery failed",
516         [23]    = "adapter recovery failed",
517         [24]    = "qdio queues down",
518         [25]    = "p2p failed",
519         [26]    = "nameserver lookup failed",
520         [27]    = "nameserver port failed",
521         [28]    = "link up",
522         [29]    = "link down",
523         [30]    = "link up status read",
524         [31]    = "open port failed",
525         [32]    = "",
526         [33]    = "close port",
527         [34]    = "open unit failed",
528         [35]    = "exclusive open unit failed",
529         [36]    = "shared open unit failed",
530         [37]    = "link down",
531         [38]    = "link down status read no link",
532         [39]    = "link down status read fdisc login",
533         [40]    = "link down status read firmware update",
534         [41]    = "link down status read unknown reason",
535         [42]    = "link down ecd incomplete",
536         [43]    = "link down epd incomplete",
537         [44]    = "sysfs adapter recovery",
538         [45]    = "sysfs port recovery",
539         [46]    = "sysfs unit recovery",
540         [47]    = "port boxed abort",
541         [48]    = "unit boxed abort",
542         [49]    = "port boxed ct",
543         [50]    = "port boxed close physical",
544         [51]    = "port boxed open unit",
545         [52]    = "port boxed close unit",
546         [53]    = "port boxed fcp",
547         [54]    = "unit boxed fcp",
548         [55]    = "port access denied",
549         [56]    = "",
550         [57]    = "",
551         [58]    = "",
552         [59]    = "unit access denied",
553         [60]    = "shared unit access denied open unit",
554         [61]    = "",
555         [62]    = "request timeout",
556         [63]    = "adisc link test reject or timeout",
557         [64]    = "adisc link test d_id changed",
558         [65]    = "adisc link test failed",
559         [66]    = "recovery out of memory",
560         [67]    = "adapter recovery repeated after state change",
561         [68]    = "port recovery repeated after state change",
562         [69]    = "unit recovery repeated after state change",
563         [70]    = "port recovery follow-up after successful adapter recovery",
564         [71]    = "adapter recovery escalation after failed adapter recovery",
565         [72]    = "port recovery follow-up after successful physical port "
566                   "recovery",
567         [73]    = "adapter recovery escalation after failed physical port "
568                   "recovery",
569         [74]    = "unit recovery follow-up after successful port recovery",
570         [75]    = "physical port recovery escalation after failed port "
571                   "recovery",
572         [76]    = "port recovery escalation after failed unit recovery",
573         [77]    = "",
574         [78]    = "duplicate request id",
575         [79]    = "link down",
576         [80]    = "exclusive read-only unit access unsupported",
577         [81]    = "shared read-write unit access unsupported",
578         [82]    = "incoming rscn",
579         [83]    = "incoming wwpn",
580         [84]    = "wka port handle not valid close port",
581         [85]    = "online",
582         [86]    = "offline",
583         [87]    = "ccw device gone",
584         [88]    = "ccw device no path",
585         [89]    = "ccw device operational",
586         [90]    = "ccw device shutdown",
587         [91]    = "sysfs port addition",
588         [92]    = "sysfs port removal",
589         [93]    = "sysfs adapter recovery",
590         [94]    = "sysfs unit addition",
591         [95]    = "sysfs unit removal",
592         [96]    = "sysfs port recovery",
593         [97]    = "sysfs unit recovery",
594         [98]    = "sequence number mismatch",
595         [99]    = "link up",
596         [100]   = "error state",
597         [101]   = "status read physical port closed",
598         [102]   = "link up status read",
599         [103]   = "too many failed status read buffers",
600         [104]   = "port handle not valid abort",
601         [105]   = "lun handle not valid abort",
602         [106]   = "port handle not valid ct",
603         [107]   = "port handle not valid close port",
604         [108]   = "port handle not valid close physical port",
605         [109]   = "port handle not valid open unit",
606         [110]   = "port handle not valid close unit",
607         [111]   = "lun handle not valid close unit",
608         [112]   = "port handle not valid fcp",
609         [113]   = "lun handle not valid fcp",
610         [114]   = "handle mismatch fcp",
611         [115]   = "lun not valid fcp",
612         [116]   = "qdio send failed",
613         [117]   = "version mismatch",
614         [118]   = "incompatible qtcb type",
615         [119]   = "unknown protocol status",
616         [120]   = "unknown fsf command",
617         [121]   = "no recommendation for status qualifier",
618         [122]   = "status read physical port closed in error",
619         [123]   = "fc service class not supported",
620         [124]   = "",
621         [125]   = "need newer zfcp",
622         [126]   = "need newer microcode",
623         [127]   = "arbitrated loop not supported",
624         [128]   = "",
625         [129]   = "qtcb size mismatch",
626         [130]   = "unknown fsf status ecd",
627         [131]   = "fcp request too big",
628         [132]   = "",
629         [133]   = "data direction not valid fcp",
630         [134]   = "command length not valid fcp",
631         [135]   = "status read act update",
632         [136]   = "status read cfdc update",
633         [137]   = "hbaapi port open",
634         [138]   = "hbaapi unit open",
635         [139]   = "hbaapi unit shutdown",
636         [140]   = "qdio error outbound",
637         [141]   = "scsi host reset",
638         [142]   = "dismissing fsf request for recovery action",
639         [143]   = "recovery action timed out",
640         [144]   = "recovery action gone",
641         [145]   = "recovery action being processed",
642         [146]   = "recovery action ready for next step",
643         [147]   = "qdio error inbound",
644         [148]   = "nameserver needed for port scan",
645         [149]   = "port scan",
646         [150]   = "ptp attach",
647         [151]   = "port validation failed",
648 };
649
650 static int zfcp_rec_dbf_view_format(debug_info_t *id, struct debug_view *view,
651                                     char *buf, const char *_rec)
652 {
653         struct zfcp_rec_dbf_record *r = (struct zfcp_rec_dbf_record *)_rec;
654         char *p = buf;
655
656         zfcp_dbf_outs(&p, "tag", zfcp_rec_dbf_tags[r->id]);
657         zfcp_dbf_outs(&p, "hint", zfcp_rec_dbf_ids[r->id2]);
658         zfcp_dbf_out(&p, "id", "%d", r->id2);
659         switch (r->id) {
660         case ZFCP_REC_DBF_ID_THREAD:
661                 zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
662                 zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
663                 zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
664                 break;
665         case ZFCP_REC_DBF_ID_TARGET:
666                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
667                 zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
668                 zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
669                 zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
670                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
671                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
672                 break;
673         case ZFCP_REC_DBF_ID_TRIGGER:
674                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
675                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
676                 zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
677                 zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
678                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
679                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
680                 zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
681                 zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
682                 zfcp_dbf_out(&p, "unit_status", "0x%08x", r->u.trigger.us);
683                 break;
684         case ZFCP_REC_DBF_ID_ACTION:
685                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
686                 zfcp_dbf_out(&p, "fsf_req", "0x%016Lx", r->u.action.fsf_req);
687                 zfcp_dbf_out(&p, "status", "0x%08Lx", r->u.action.status);
688                 zfcp_dbf_out(&p, "step", "0x%08Lx", r->u.action.step);
689                 break;
690         }
691         p += sprintf(p, "\n");
692         return p - buf;
693 }
694
695 static struct debug_view zfcp_rec_dbf_view = {
696         "structured",
697         NULL,
698         &zfcp_dbf_view_header,
699         &zfcp_rec_dbf_view_format,
700         NULL,
701         NULL
702 };
703
704 /**
705  * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
706  * @id2: identifier for event
707  * @adapter: adapter
708  * This function assumes that the caller is holding erp_lock.
709  */
710 void zfcp_rec_dbf_event_thread(u8 id2, struct zfcp_adapter *adapter)
711 {
712         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
713         unsigned long flags = 0;
714         struct list_head *entry;
715         unsigned ready = 0, running = 0, total;
716
717         list_for_each(entry, &adapter->erp_ready_head)
718                 ready++;
719         list_for_each(entry, &adapter->erp_running_head)
720                 running++;
721         total = adapter->erp_total_count;
722
723         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
724         memset(r, 0, sizeof(*r));
725         r->id = ZFCP_REC_DBF_ID_THREAD;
726         r->id2 = id2;
727         r->u.thread.total = total;
728         r->u.thread.ready = ready;
729         r->u.thread.running = running;
730         debug_event(adapter->rec_dbf, 6, r, sizeof(*r));
731         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
732 }
733
734 /**
735  * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
736  * @id2: identifier for event
737  * @adapter: adapter
738  * This function assumes that the caller does not hold erp_lock.
739  */
740 void zfcp_rec_dbf_event_thread_lock(u8 id2, struct zfcp_adapter *adapter)
741 {
742         unsigned long flags;
743
744         read_lock_irqsave(&adapter->erp_lock, flags);
745         zfcp_rec_dbf_event_thread(id2, adapter);
746         read_unlock_irqrestore(&adapter->erp_lock, flags);
747 }
748
749 static void zfcp_rec_dbf_event_target(u8 id2, void *ref,
750                                       struct zfcp_adapter *adapter,
751                                       atomic_t *status, atomic_t *erp_count,
752                                       u64 wwpn, u32 d_id, u64 fcp_lun)
753 {
754         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
755         unsigned long flags;
756
757         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
758         memset(r, 0, sizeof(*r));
759         r->id = ZFCP_REC_DBF_ID_TARGET;
760         r->id2 = id2;
761         r->u.target.ref = (unsigned long)ref;
762         r->u.target.status = atomic_read(status);
763         r->u.target.wwpn = wwpn;
764         r->u.target.d_id = d_id;
765         r->u.target.fcp_lun = fcp_lun;
766         r->u.target.erp_count = atomic_read(erp_count);
767         debug_event(adapter->rec_dbf, 3, r, sizeof(*r));
768         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
769 }
770
771 /**
772  * zfcp_rec_dbf_event_adapter - trace event for adapter state change
773  * @id: identifier for trigger of state change
774  * @ref: additional reference (e.g. request)
775  * @adapter: adapter
776  */
777 void zfcp_rec_dbf_event_adapter(u8 id, void *ref, struct zfcp_adapter *adapter)
778 {
779         zfcp_rec_dbf_event_target(id, ref, adapter, &adapter->status,
780                                   &adapter->erp_counter, 0, 0, 0);
781 }
782
783 /**
784  * zfcp_rec_dbf_event_port - trace event for port state change
785  * @id: identifier for trigger of state change
786  * @ref: additional reference (e.g. request)
787  * @port: port
788  */
789 void zfcp_rec_dbf_event_port(u8 id, void *ref, struct zfcp_port *port)
790 {
791         struct zfcp_adapter *adapter = port->adapter;
792
793         zfcp_rec_dbf_event_target(id, ref, adapter, &port->status,
794                                   &port->erp_counter, port->wwpn, port->d_id,
795                                   0);
796 }
797
798 /**
799  * zfcp_rec_dbf_event_unit - trace event for unit state change
800  * @id: identifier for trigger of state change
801  * @ref: additional reference (e.g. request)
802  * @unit: unit
803  */
804 void zfcp_rec_dbf_event_unit(u8 id, void *ref, struct zfcp_unit *unit)
805 {
806         struct zfcp_port *port = unit->port;
807         struct zfcp_adapter *adapter = port->adapter;
808
809         zfcp_rec_dbf_event_target(id, ref, adapter, &unit->status,
810                                   &unit->erp_counter, port->wwpn, port->d_id,
811                                   unit->fcp_lun);
812 }
813
814 /**
815  * zfcp_rec_dbf_event_trigger - trace event for triggered error recovery
816  * @id2: identifier for error recovery trigger
817  * @ref: additional reference (e.g. request)
818  * @want: originally requested error recovery action
819  * @need: error recovery action actually initiated
820  * @action: address of error recovery action struct
821  * @adapter: adapter
822  * @port: port
823  * @unit: unit
824  */
825 void zfcp_rec_dbf_event_trigger(u8 id2, void *ref, u8 want, u8 need,
826                                 void *action, struct zfcp_adapter *adapter,
827                                 struct zfcp_port *port, struct zfcp_unit *unit)
828 {
829         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
830         unsigned long flags;
831
832         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
833         memset(r, 0, sizeof(*r));
834         r->id = ZFCP_REC_DBF_ID_TRIGGER;
835         r->id2 = id2;
836         r->u.trigger.ref = (unsigned long)ref;
837         r->u.trigger.want = want;
838         r->u.trigger.need = need;
839         r->u.trigger.action = (unsigned long)action;
840         r->u.trigger.as = atomic_read(&adapter->status);
841         if (port) {
842                 r->u.trigger.ps = atomic_read(&port->status);
843                 r->u.trigger.wwpn = port->wwpn;
844         }
845         if (unit) {
846                 r->u.trigger.us = atomic_read(&unit->status);
847                 r->u.trigger.fcp_lun = unit->fcp_lun;
848         }
849         debug_event(adapter->rec_dbf, action ? 1 : 4, r, sizeof(*r));
850         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
851 }
852
853 /**
854  * zfcp_rec_dbf_event_action - trace event showing progress of recovery action
855  * @id2: identifier
856  * @erp_action: error recovery action struct pointer
857  */
858 void zfcp_rec_dbf_event_action(u8 id2, struct zfcp_erp_action *erp_action)
859 {
860         struct zfcp_adapter *adapter = erp_action->adapter;
861         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
862         unsigned long flags;
863
864         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
865         memset(r, 0, sizeof(*r));
866         r->id = ZFCP_REC_DBF_ID_ACTION;
867         r->id2 = id2;
868         r->u.action.action = (unsigned long)erp_action;
869         r->u.action.status = erp_action->status;
870         r->u.action.step = erp_action->step;
871         r->u.action.fsf_req = (unsigned long)erp_action->fsf_req;
872         debug_event(adapter->rec_dbf, 5, r, sizeof(*r));
873         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
874 }
875
876 /**
877  * zfcp_san_dbf_event_ct_request - trace event for issued CT request
878  * @fsf_req: request containing issued CT data
879  */
880 void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
881 {
882         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
883         struct zfcp_wka_port *wka_port = ct->wka_port;
884         struct zfcp_adapter *adapter = wka_port->adapter;
885         struct ct_hdr *hdr = sg_virt(ct->req);
886         struct zfcp_san_dbf_record *r = &adapter->san_dbf_buf;
887         struct zfcp_san_dbf_record_ct_request *oct = &r->u.ct_req;
888         int level = 3;
889         unsigned long flags;
890
891         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
892         memset(r, 0, sizeof(*r));
893         strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
894         r->fsf_reqid = (unsigned long)fsf_req;
895         r->fsf_seqno = fsf_req->seq_no;
896         r->s_id = fc_host_port_id(adapter->scsi_host);
897         r->d_id = wka_port->d_id;
898         oct->cmd_req_code = hdr->cmd_rsp_code;
899         oct->revision = hdr->revision;
900         oct->gs_type = hdr->gs_type;
901         oct->gs_subtype = hdr->gs_subtype;
902         oct->options = hdr->options;
903         oct->max_res_size = hdr->max_res_size;
904         oct->len = min((int)ct->req->length - (int)sizeof(struct ct_hdr),
905                        ZFCP_DBF_SAN_MAX_PAYLOAD);
906         debug_event(adapter->san_dbf, level, r, sizeof(*r));
907         zfcp_dbf_hexdump(adapter->san_dbf, r, sizeof(*r), level,
908                          (void *)hdr + sizeof(struct ct_hdr), oct->len);
909         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
910 }
911
912 /**
913  * zfcp_san_dbf_event_ct_response - trace event for completion of CT request
914  * @fsf_req: request containing CT response
915  */
916 void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
917 {
918         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
919         struct zfcp_wka_port *wka_port = ct->wka_port;
920         struct zfcp_adapter *adapter = wka_port->adapter;
921         struct ct_hdr *hdr = sg_virt(ct->resp);
922         struct zfcp_san_dbf_record *r = &adapter->san_dbf_buf;
923         struct zfcp_san_dbf_record_ct_response *rct = &r->u.ct_resp;
924         int level = 3;
925         unsigned long flags;
926
927         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
928         memset(r, 0, sizeof(*r));
929         strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
930         r->fsf_reqid = (unsigned long)fsf_req;
931         r->fsf_seqno = fsf_req->seq_no;
932         r->s_id = wka_port->d_id;
933         r->d_id = fc_host_port_id(adapter->scsi_host);
934         rct->cmd_rsp_code = hdr->cmd_rsp_code;
935         rct->revision = hdr->revision;
936         rct->reason_code = hdr->reason_code;
937         rct->expl = hdr->reason_code_expl;
938         rct->vendor_unique = hdr->vendor_unique;
939         rct->max_res_size = hdr->max_res_size;
940         rct->len = min((int)ct->resp->length - (int)sizeof(struct ct_hdr),
941                        ZFCP_DBF_SAN_MAX_PAYLOAD);
942         debug_event(adapter->san_dbf, level, r, sizeof(*r));
943         zfcp_dbf_hexdump(adapter->san_dbf, r, sizeof(*r), level,
944                          (void *)hdr + sizeof(struct ct_hdr), rct->len);
945         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
946 }
947
948 static void zfcp_san_dbf_event_els(const char *tag, int level,
949                                    struct zfcp_fsf_req *fsf_req, u32 s_id,
950                                    u32 d_id, u8 ls_code, void *buffer,
951                                    int buflen)
952 {
953         struct zfcp_adapter *adapter = fsf_req->adapter;
954         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
955         unsigned long flags;
956
957         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
958         memset(rec, 0, sizeof(*rec));
959         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
960         rec->fsf_reqid = (unsigned long)fsf_req;
961         rec->fsf_seqno = fsf_req->seq_no;
962         rec->s_id = s_id;
963         rec->d_id = d_id;
964         rec->u.els.ls_code = ls_code;
965         debug_event(adapter->san_dbf, level, rec, sizeof(*rec));
966         zfcp_dbf_hexdump(adapter->san_dbf, rec, sizeof(*rec), level,
967                          buffer, min(buflen, ZFCP_DBF_SAN_MAX_PAYLOAD));
968         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
969 }
970
971 /**
972  * zfcp_san_dbf_event_els_request - trace event for issued ELS
973  * @fsf_req: request containing issued ELS
974  */
975 void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
976 {
977         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
978
979         zfcp_san_dbf_event_els("oels", 2, fsf_req,
980                                fc_host_port_id(els->adapter->scsi_host),
981                                els->d_id, *(u8 *) sg_virt(els->req),
982                                sg_virt(els->req), els->req->length);
983 }
984
985 /**
986  * zfcp_san_dbf_event_els_response - trace event for completed ELS
987  * @fsf_req: request containing ELS response
988  */
989 void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
990 {
991         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
992
993         zfcp_san_dbf_event_els("rels", 2, fsf_req, els->d_id,
994                                fc_host_port_id(els->adapter->scsi_host),
995                                *(u8 *)sg_virt(els->req), sg_virt(els->resp),
996                                els->resp->length);
997 }
998
999 /**
1000  * zfcp_san_dbf_event_incoming_els - trace event for incomig ELS
1001  * @fsf_req: request containing unsolicited status buffer with incoming ELS
1002  */
1003 void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
1004 {
1005         struct zfcp_adapter *adapter = fsf_req->adapter;
1006         struct fsf_status_read_buffer *buf =
1007                         (struct fsf_status_read_buffer *)fsf_req->data;
1008         int length = (int)buf->length -
1009                      (int)((void *)&buf->payload - (void *)buf);
1010
1011         zfcp_san_dbf_event_els("iels", 1, fsf_req, buf->d_id,
1012                                fc_host_port_id(adapter->scsi_host),
1013                                buf->payload.data[0], (void *)buf->payload.data,
1014                                length);
1015 }
1016
1017 static int zfcp_san_dbf_view_format(debug_info_t *id, struct debug_view *view,
1018                                     char *out_buf, const char *in_buf)
1019 {
1020         struct zfcp_san_dbf_record *r = (struct zfcp_san_dbf_record *)in_buf;
1021         char *p = out_buf;
1022
1023         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
1024                 return 0;
1025
1026         zfcp_dbf_tag(&p, "tag", r->tag);
1027         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
1028         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
1029         zfcp_dbf_out(&p, "s_id", "0x%06x", r->s_id);
1030         zfcp_dbf_out(&p, "d_id", "0x%06x", r->d_id);
1031
1032         if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
1033                 struct zfcp_san_dbf_record_ct_request *ct = &r->u.ct_req;
1034                 zfcp_dbf_out(&p, "cmd_req_code", "0x%04x", ct->cmd_req_code);
1035                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
1036                 zfcp_dbf_out(&p, "gs_type", "0x%02x", ct->gs_type);
1037                 zfcp_dbf_out(&p, "gs_subtype", "0x%02x", ct->gs_subtype);
1038                 zfcp_dbf_out(&p, "options", "0x%02x", ct->options);
1039                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
1040         } else if (strncmp(r->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
1041                 struct zfcp_san_dbf_record_ct_response *ct = &r->u.ct_resp;
1042                 zfcp_dbf_out(&p, "cmd_rsp_code", "0x%04x", ct->cmd_rsp_code);
1043                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
1044                 zfcp_dbf_out(&p, "reason_code", "0x%02x", ct->reason_code);
1045                 zfcp_dbf_out(&p, "reason_code_expl", "0x%02x", ct->expl);
1046                 zfcp_dbf_out(&p, "vendor_unique", "0x%02x", ct->vendor_unique);
1047                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
1048         } else if (strncmp(r->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
1049                    strncmp(r->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
1050                    strncmp(r->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
1051                 struct zfcp_san_dbf_record_els *els = &r->u.els;
1052                 zfcp_dbf_out(&p, "ls_code", "0x%02x", els->ls_code);
1053         }
1054         return p - out_buf;
1055 }
1056
1057 static struct debug_view zfcp_san_dbf_view = {
1058         "structured",
1059         NULL,
1060         &zfcp_dbf_view_header,
1061         &zfcp_san_dbf_view_format,
1062         NULL,
1063         NULL
1064 };
1065
1066 static void zfcp_scsi_dbf_event(const char *tag, const char *tag2, int level,
1067                                 struct zfcp_adapter *adapter,
1068                                 struct scsi_cmnd *scsi_cmnd,
1069                                 struct zfcp_fsf_req *fsf_req,
1070                                 unsigned long old_req_id)
1071 {
1072         struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
1073         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
1074         unsigned long flags;
1075         struct fcp_rsp_iu *fcp_rsp;
1076         char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
1077         int offset = 0, buflen = 0;
1078
1079         spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
1080         do {
1081                 memset(rec, 0, sizeof(*rec));
1082                 if (offset == 0) {
1083                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
1084                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
1085                         if (scsi_cmnd != NULL) {
1086                                 if (scsi_cmnd->device) {
1087                                         rec->scsi_id = scsi_cmnd->device->id;
1088                                         rec->scsi_lun = scsi_cmnd->device->lun;
1089                                 }
1090                                 rec->scsi_result = scsi_cmnd->result;
1091                                 rec->scsi_cmnd = (unsigned long)scsi_cmnd;
1092                                 rec->scsi_serial = scsi_cmnd->serial_number;
1093                                 memcpy(rec->scsi_opcode, scsi_cmnd->cmnd,
1094                                         min((int)scsi_cmnd->cmd_len,
1095                                                 ZFCP_DBF_SCSI_OPCODE));
1096                                 rec->scsi_retries = scsi_cmnd->retries;
1097                                 rec->scsi_allowed = scsi_cmnd->allowed;
1098                         }
1099                         if (fsf_req != NULL) {
1100                                 fcp_rsp = (struct fcp_rsp_iu *)
1101                                     &(fsf_req->qtcb->bottom.io.fcp_rsp);
1102                                 fcp_rsp_info = (unsigned char *) &fcp_rsp[1];
1103                                 fcp_sns_info =
1104                                     zfcp_get_fcp_sns_info_ptr(fcp_rsp);
1105
1106                                 rec->rsp_validity = fcp_rsp->validity.value;
1107                                 rec->rsp_scsi_status = fcp_rsp->scsi_status;
1108                                 rec->rsp_resid = fcp_rsp->fcp_resid;
1109                                 if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
1110                                         rec->rsp_code = *(fcp_rsp_info + 3);
1111                                 if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
1112                                         buflen = min((int)fcp_rsp->fcp_sns_len,
1113                                                      ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
1114                                         rec->sns_info_len = buflen;
1115                                         memcpy(rec->sns_info, fcp_sns_info,
1116                                                min(buflen,
1117                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
1118                                         offset += min(buflen,
1119                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
1120                                 }
1121
1122                                 rec->fsf_reqid = (unsigned long)fsf_req;
1123                                 rec->fsf_seqno = fsf_req->seq_no;
1124                                 rec->fsf_issued = fsf_req->issued;
1125                         }
1126                         rec->old_fsf_reqid = old_req_id;
1127                 } else {
1128                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
1129                         dump->total_size = buflen;
1130                         dump->offset = offset;
1131                         dump->size = min(buflen - offset,
1132                                          (int)sizeof(struct
1133                                                      zfcp_scsi_dbf_record) -
1134                                          (int)sizeof(struct zfcp_dbf_dump));
1135                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
1136                         offset += dump->size;
1137                 }
1138                 debug_event(adapter->scsi_dbf, level, rec, sizeof(*rec));
1139         } while (offset < buflen);
1140         spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
1141 }
1142
1143 /**
1144  * zfcp_scsi_dbf_event_result - trace event for SCSI command completion
1145  * @tag: tag indicating success or failure of SCSI command
1146  * @level: trace level applicable for this event
1147  * @adapter: adapter that has been used to issue the SCSI command
1148  * @scsi_cmnd: SCSI command pointer
1149  * @fsf_req: request used to issue SCSI command (might be NULL)
1150  */
1151 void zfcp_scsi_dbf_event_result(const char *tag, int level,
1152                                 struct zfcp_adapter *adapter,
1153                                 struct scsi_cmnd *scsi_cmnd,
1154                                 struct zfcp_fsf_req *fsf_req)
1155 {
1156         zfcp_scsi_dbf_event("rslt", tag, level, adapter, scsi_cmnd, fsf_req, 0);
1157 }
1158
1159 /**
1160  * zfcp_scsi_dbf_event_abort - trace event for SCSI command abort
1161  * @tag: tag indicating success or failure of abort operation
1162  * @adapter: adapter thas has been used to issue SCSI command to be aborted
1163  * @scsi_cmnd: SCSI command to be aborted
1164  * @new_fsf_req: request containing abort (might be NULL)
1165  * @old_req_id: identifier of request containg SCSI command to be aborted
1166  */
1167 void zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
1168                                struct scsi_cmnd *scsi_cmnd,
1169                                struct zfcp_fsf_req *new_fsf_req,
1170                                unsigned long old_req_id)
1171 {
1172         zfcp_scsi_dbf_event("abrt", tag, 1, adapter, scsi_cmnd, new_fsf_req,
1173                             old_req_id);
1174 }
1175
1176 /**
1177  * zfcp_scsi_dbf_event_devreset - trace event for Logical Unit or Target Reset
1178  * @tag: tag indicating success or failure of reset operation
1179  * @flag: indicates type of reset (Target Reset, Logical Unit Reset)
1180  * @unit: unit that needs reset
1181  * @scsi_cmnd: SCSI command which caused this error recovery
1182  */
1183 void zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag,
1184                                   struct zfcp_unit *unit,
1185                                   struct scsi_cmnd *scsi_cmnd)
1186 {
1187         zfcp_scsi_dbf_event(flag == FCP_TARGET_RESET ? "trst" : "lrst", tag, 1,
1188                             unit->port->adapter, scsi_cmnd, NULL, 0);
1189 }
1190
1191 static int zfcp_scsi_dbf_view_format(debug_info_t *id, struct debug_view *view,
1192                                      char *out_buf, const char *in_buf)
1193 {
1194         struct zfcp_scsi_dbf_record *r = (struct zfcp_scsi_dbf_record *)in_buf;
1195         struct timespec t;
1196         char *p = out_buf;
1197
1198         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
1199                 return 0;
1200
1201         zfcp_dbf_tag(&p, "tag", r->tag);
1202         zfcp_dbf_tag(&p, "tag2", r->tag2);
1203         zfcp_dbf_out(&p, "scsi_id", "0x%08x", r->scsi_id);
1204         zfcp_dbf_out(&p, "scsi_lun", "0x%08x", r->scsi_lun);
1205         zfcp_dbf_out(&p, "scsi_result", "0x%08x", r->scsi_result);
1206         zfcp_dbf_out(&p, "scsi_cmnd", "0x%0Lx", r->scsi_cmnd);
1207         zfcp_dbf_out(&p, "scsi_serial", "0x%016Lx", r->scsi_serial);
1208         zfcp_dbf_outd(&p, "scsi_opcode", r->scsi_opcode, ZFCP_DBF_SCSI_OPCODE,
1209                       0, ZFCP_DBF_SCSI_OPCODE);
1210         zfcp_dbf_out(&p, "scsi_retries", "0x%02x", r->scsi_retries);
1211         zfcp_dbf_out(&p, "scsi_allowed", "0x%02x", r->scsi_allowed);
1212         if (strncmp(r->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0)
1213                 zfcp_dbf_out(&p, "old_fsf_reqid", "0x%0Lx", r->old_fsf_reqid);
1214         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
1215         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
1216         zfcp_dbf_timestamp(r->fsf_issued, &t);
1217         zfcp_dbf_out(&p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
1218
1219         if (strncmp(r->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
1220                 zfcp_dbf_out(&p, "fcp_rsp_validity", "0x%02x", r->rsp_validity);
1221                 zfcp_dbf_out(&p, "fcp_rsp_scsi_status", "0x%02x",
1222                              r->rsp_scsi_status);
1223                 zfcp_dbf_out(&p, "fcp_rsp_resid", "0x%08x", r->rsp_resid);
1224                 zfcp_dbf_out(&p, "fcp_rsp_code", "0x%08x", r->rsp_code);
1225                 zfcp_dbf_out(&p, "fcp_sns_info_len", "0x%08x", r->sns_info_len);
1226                 zfcp_dbf_outd(&p, "fcp_sns_info", r->sns_info,
1227                               min((int)r->sns_info_len,
1228                               ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
1229                               r->sns_info_len);
1230         }
1231         p += sprintf(p, "\n");
1232         return p - out_buf;
1233 }
1234
1235 static struct debug_view zfcp_scsi_dbf_view = {
1236         "structured",
1237         NULL,
1238         &zfcp_dbf_view_header,
1239         &zfcp_scsi_dbf_view_format,
1240         NULL,
1241         NULL
1242 };
1243
1244 /**
1245  * zfcp_adapter_debug_register - registers debug feature for an adapter
1246  * @adapter: pointer to adapter for which debug features should be registered
1247  * return: -ENOMEM on error, 0 otherwise
1248  */
1249 int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
1250 {
1251         char dbf_name[DEBUG_MAX_NAME_LEN];
1252
1253         /* debug feature area which records recovery activity */
1254         sprintf(dbf_name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev));
1255         adapter->rec_dbf = debug_register(dbf_name, dbfsize, 1,
1256                                           sizeof(struct zfcp_rec_dbf_record));
1257         if (!adapter->rec_dbf)
1258                 goto failed;
1259         debug_register_view(adapter->rec_dbf, &debug_hex_ascii_view);
1260         debug_register_view(adapter->rec_dbf, &zfcp_rec_dbf_view);
1261         debug_set_level(adapter->rec_dbf, 3);
1262
1263         /* debug feature area which records HBA (FSF and QDIO) conditions */
1264         sprintf(dbf_name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev));
1265         adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
1266                                           sizeof(struct zfcp_hba_dbf_record));
1267         if (!adapter->hba_dbf)
1268                 goto failed;
1269         debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
1270         debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
1271         debug_set_level(adapter->hba_dbf, 3);
1272
1273         /* debug feature area which records SAN command failures and recovery */
1274         sprintf(dbf_name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev));
1275         adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
1276                                           sizeof(struct zfcp_san_dbf_record));
1277         if (!adapter->san_dbf)
1278                 goto failed;
1279         debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
1280         debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
1281         debug_set_level(adapter->san_dbf, 6);
1282
1283         /* debug feature area which records SCSI command failures and recovery */
1284         sprintf(dbf_name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev));
1285         adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
1286                                            sizeof(struct zfcp_scsi_dbf_record));
1287         if (!adapter->scsi_dbf)
1288                 goto failed;
1289         debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
1290         debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
1291         debug_set_level(adapter->scsi_dbf, 3);
1292
1293         return 0;
1294
1295  failed:
1296         zfcp_adapter_debug_unregister(adapter);
1297
1298         return -ENOMEM;
1299 }
1300
1301 /**
1302  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
1303  * @adapter: pointer to adapter for which debug features should be unregistered
1304  */
1305 void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
1306 {
1307         debug_unregister(adapter->scsi_dbf);
1308         debug_unregister(adapter->san_dbf);
1309         debug_unregister(adapter->hba_dbf);
1310         debug_unregister(adapter->rec_dbf);
1311         adapter->scsi_dbf = NULL;
1312         adapter->san_dbf = NULL;
1313         adapter->hba_dbf = NULL;
1314         adapter->rec_dbf = NULL;
1315 }