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