9p: restrict RDMA usage
[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);
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, NULL, 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                 break;
370
371         case FSF_QTCB_OPEN_PORT_WITH_DID:
372         case FSF_QTCB_CLOSE_PORT:
373         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
374                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.port.wwpn);
375                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.port.d_id);
376                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.port.port_handle);
377                 break;
378
379         case FSF_QTCB_OPEN_LUN:
380         case FSF_QTCB_CLOSE_LUN:
381                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.unit.wwpn);
382                 zfcp_dbf_out(p, "fcp_lun", "0x%016Lx", r->u.unit.fcp_lun);
383                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.unit.port_handle);
384                 zfcp_dbf_out(p, "lun_handle", "0x%08x", r->u.unit.lun_handle);
385                 break;
386
387         case FSF_QTCB_SEND_ELS:
388                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.els.d_id);
389                 zfcp_dbf_out(p, "ls_code", "0x%02x", r->u.els.ls_code);
390                 break;
391
392         case FSF_QTCB_ABORT_FCP_CMND:
393         case FSF_QTCB_SEND_GENERIC:
394         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
395         case FSF_QTCB_EXCHANGE_PORT_DATA:
396         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
397         case FSF_QTCB_UPLOAD_CONTROL_FILE:
398                 break;
399         }
400 }
401
402 static void zfcp_hba_dbf_view_status(char **p,
403                                      struct zfcp_hba_dbf_record_status *r)
404 {
405         zfcp_dbf_out(p, "failed", "0x%02x", r->failed);
406         zfcp_dbf_out(p, "status_type", "0x%08x", r->status_type);
407         zfcp_dbf_out(p, "status_subtype", "0x%08x", r->status_subtype);
408         zfcp_dbf_outd(p, "queue_designator", (char *)&r->queue_designator,
409                       sizeof(struct fsf_queue_designator), 0,
410                       sizeof(struct fsf_queue_designator));
411         zfcp_dbf_outd(p, "payload", (char *)&r->payload, r->payload_size, 0,
412                       r->payload_size);
413 }
414
415 static void zfcp_hba_dbf_view_qdio(char **p, struct zfcp_hba_dbf_record_qdio *r)
416 {
417         zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
418         zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
419         zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
420 }
421
422 static void zfcp_hba_dbf_view_berr(char **p, struct fsf_bit_error_payload *r)
423 {
424         zfcp_dbf_out(p, "link_failures", "%d", r->link_failure_error_count);
425         zfcp_dbf_out(p, "loss_of_sync_err", "%d", r->loss_of_sync_error_count);
426         zfcp_dbf_out(p, "loss_of_sig_err", "%d", r->loss_of_signal_error_count);
427         zfcp_dbf_out(p, "prim_seq_err", "%d",
428                      r->primitive_sequence_error_count);
429         zfcp_dbf_out(p, "inval_trans_word_err", "%d",
430                      r->invalid_transmission_word_error_count);
431         zfcp_dbf_out(p, "CRC_errors", "%d", r->crc_error_count);
432         zfcp_dbf_out(p, "prim_seq_event_to", "%d",
433                      r->primitive_sequence_event_timeout_count);
434         zfcp_dbf_out(p, "elast_buf_overrun_err", "%d",
435                      r->elastic_buffer_overrun_error_count);
436         zfcp_dbf_out(p, "adv_rec_buf2buf_cred", "%d",
437                      r->advertised_receive_b2b_credit);
438         zfcp_dbf_out(p, "curr_rec_buf2buf_cred", "%d",
439                      r->current_receive_b2b_credit);
440         zfcp_dbf_out(p, "adv_trans_buf2buf_cred", "%d",
441                      r->advertised_transmit_b2b_credit);
442         zfcp_dbf_out(p, "curr_trans_buf2buf_cred", "%d",
443                      r->current_transmit_b2b_credit);
444 }
445
446 static int zfcp_hba_dbf_view_format(debug_info_t *id, struct debug_view *view,
447                                     char *out_buf, const char *in_buf)
448 {
449         struct zfcp_hba_dbf_record *r = (struct zfcp_hba_dbf_record *)in_buf;
450         char *p = out_buf;
451
452         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
453                 return 0;
454
455         zfcp_dbf_tag(&p, "tag", r->tag);
456         if (isalpha(r->tag2[0]))
457                 zfcp_dbf_tag(&p, "tag2", r->tag2);
458
459         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
460                 zfcp_hba_dbf_view_response(&p, &r->u.response);
461         else if (strncmp(r->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
462                 zfcp_hba_dbf_view_status(&p, &r->u.status);
463         else if (strncmp(r->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
464                 zfcp_hba_dbf_view_qdio(&p, &r->u.qdio);
465         else if (strncmp(r->tag, "berr", ZFCP_DBF_TAG_SIZE) == 0)
466                 zfcp_hba_dbf_view_berr(&p, &r->u.berr);
467
468         p += sprintf(p, "\n");
469         return p - out_buf;
470 }
471
472 static struct debug_view zfcp_hba_dbf_view = {
473         "structured",
474         NULL,
475         &zfcp_dbf_view_header,
476         &zfcp_hba_dbf_view_format,
477         NULL,
478         NULL
479 };
480
481 static const char *zfcp_rec_dbf_tags[] = {
482         [ZFCP_REC_DBF_ID_THREAD] = "thread",
483         [ZFCP_REC_DBF_ID_TARGET] = "target",
484         [ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
485         [ZFCP_REC_DBF_ID_ACTION] = "action",
486 };
487
488 static const char *zfcp_rec_dbf_ids[] = {
489         [1]     = "new",
490         [2]     = "ready",
491         [3]     = "kill",
492         [4]     = "down sleep",
493         [5]     = "down wakeup",
494         [6]     = "down sleep ecd",
495         [7]     = "down wakeup ecd",
496         [8]     = "down sleep epd",
497         [9]     = "down wakeup epd",
498         [10]    = "online",
499         [11]    = "operational",
500         [12]    = "scsi slave destroy",
501         [13]    = "propagate failed adapter",
502         [14]    = "propagate failed port",
503         [15]    = "block adapter",
504         [16]    = "unblock adapter",
505         [17]    = "block port",
506         [18]    = "unblock port",
507         [19]    = "block unit",
508         [20]    = "unblock unit",
509         [21]    = "unit recovery failed",
510         [22]    = "port recovery failed",
511         [23]    = "adapter recovery failed",
512         [24]    = "qdio queues down",
513         [25]    = "p2p failed",
514         [26]    = "nameserver lookup failed",
515         [27]    = "nameserver port failed",
516         [28]    = "link up",
517         [29]    = "link down",
518         [30]    = "link up status read",
519         [31]    = "open port failed",
520         [32]    = "open port failed",
521         [33]    = "close port",
522         [34]    = "open unit failed",
523         [35]    = "exclusive open unit failed",
524         [36]    = "shared open unit failed",
525         [37]    = "link down",
526         [38]    = "link down status read no link",
527         [39]    = "link down status read fdisc login",
528         [40]    = "link down status read firmware update",
529         [41]    = "link down status read unknown reason",
530         [42]    = "link down ecd incomplete",
531         [43]    = "link down epd incomplete",
532         [44]    = "sysfs adapter recovery",
533         [45]    = "sysfs port recovery",
534         [46]    = "sysfs unit recovery",
535         [47]    = "port boxed abort",
536         [48]    = "unit boxed abort",
537         [49]    = "port boxed ct",
538         [50]    = "port boxed close physical",
539         [51]    = "port boxed open unit",
540         [52]    = "port boxed close unit",
541         [53]    = "port boxed fcp",
542         [54]    = "unit boxed fcp",
543         [55]    = "port access denied",
544         [56]    = "",
545         [57]    = "",
546         [58]    = "",
547         [59]    = "unit access denied",
548         [60]    = "shared unit access denied open unit",
549         [61]    = "",
550         [62]    = "request timeout",
551         [63]    = "adisc link test reject or timeout",
552         [64]    = "adisc link test d_id changed",
553         [65]    = "adisc link test failed",
554         [66]    = "recovery out of memory",
555         [67]    = "adapter recovery repeated after state change",
556         [68]    = "port recovery repeated after state change",
557         [69]    = "unit recovery repeated after state change",
558         [70]    = "port recovery follow-up after successful adapter recovery",
559         [71]    = "adapter recovery escalation after failed adapter recovery",
560         [72]    = "port recovery follow-up after successful physical port "
561                   "recovery",
562         [73]    = "adapter recovery escalation after failed physical port "
563                   "recovery",
564         [74]    = "unit recovery follow-up after successful port recovery",
565         [75]    = "physical port recovery escalation after failed port "
566                   "recovery",
567         [76]    = "port recovery escalation after failed unit recovery",
568         [77]    = "",
569         [78]    = "duplicate request id",
570         [79]    = "link down",
571         [80]    = "exclusive read-only unit access unsupported",
572         [81]    = "shared read-write unit access unsupported",
573         [82]    = "incoming rscn",
574         [83]    = "incoming wwpn",
575         [84]    = "wka port handle not valid close port",
576         [85]    = "online",
577         [86]    = "offline",
578         [87]    = "ccw device gone",
579         [88]    = "ccw device no path",
580         [89]    = "ccw device operational",
581         [90]    = "ccw device shutdown",
582         [91]    = "sysfs port addition",
583         [92]    = "sysfs port removal",
584         [93]    = "sysfs adapter recovery",
585         [94]    = "sysfs unit addition",
586         [95]    = "sysfs unit removal",
587         [96]    = "sysfs port recovery",
588         [97]    = "sysfs unit recovery",
589         [98]    = "sequence number mismatch",
590         [99]    = "link up",
591         [100]   = "error state",
592         [101]   = "status read physical port closed",
593         [102]   = "link up status read",
594         [103]   = "too many failed status read buffers",
595         [104]   = "port handle not valid abort",
596         [105]   = "lun handle not valid abort",
597         [106]   = "port handle not valid ct",
598         [107]   = "port handle not valid close port",
599         [108]   = "port handle not valid close physical port",
600         [109]   = "port handle not valid open unit",
601         [110]   = "port handle not valid close unit",
602         [111]   = "lun handle not valid close unit",
603         [112]   = "port handle not valid fcp",
604         [113]   = "lun handle not valid fcp",
605         [114]   = "handle mismatch fcp",
606         [115]   = "lun not valid fcp",
607         [116]   = "qdio send failed",
608         [117]   = "version mismatch",
609         [118]   = "incompatible qtcb type",
610         [119]   = "unknown protocol status",
611         [120]   = "unknown fsf command",
612         [121]   = "no recommendation for status qualifier",
613         [122]   = "status read physical port closed in error",
614         [123]   = "fc service class not supported",
615         [124]   = "",
616         [125]   = "need newer zfcp",
617         [126]   = "need newer microcode",
618         [127]   = "arbitrated loop not supported",
619         [128]   = "",
620         [129]   = "qtcb size mismatch",
621         [130]   = "unknown fsf status ecd",
622         [131]   = "fcp request too big",
623         [132]   = "",
624         [133]   = "data direction not valid fcp",
625         [134]   = "command length not valid fcp",
626         [135]   = "status read act update",
627         [136]   = "status read cfdc update",
628         [137]   = "hbaapi port open",
629         [138]   = "hbaapi unit open",
630         [139]   = "hbaapi unit shutdown",
631         [140]   = "qdio error outbound",
632         [141]   = "scsi host reset",
633         [142]   = "dismissing fsf request for recovery action",
634         [143]   = "recovery action timed out",
635         [144]   = "recovery action gone",
636         [145]   = "recovery action being processed",
637         [146]   = "recovery action ready for next step",
638         [147]   = "qdio error inbound",
639         [148]   = "nameserver needed for port scan",
640         [149]   = "port scan",
641         [150]   = "ptp attach",
642         [151]   = "port validation failed",
643 };
644
645 static int zfcp_rec_dbf_view_format(debug_info_t *id, struct debug_view *view,
646                                     char *buf, const char *_rec)
647 {
648         struct zfcp_rec_dbf_record *r = (struct zfcp_rec_dbf_record *)_rec;
649         char *p = buf;
650
651         zfcp_dbf_outs(&p, "tag", zfcp_rec_dbf_tags[r->id]);
652         zfcp_dbf_outs(&p, "hint", zfcp_rec_dbf_ids[r->id2]);
653         zfcp_dbf_out(&p, "id", "%d", r->id2);
654         switch (r->id) {
655         case ZFCP_REC_DBF_ID_THREAD:
656                 zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
657                 zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
658                 zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
659                 break;
660         case ZFCP_REC_DBF_ID_TARGET:
661                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
662                 zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
663                 zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
664                 zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
665                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
666                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
667                 break;
668         case ZFCP_REC_DBF_ID_TRIGGER:
669                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
670                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
671                 zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
672                 zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
673                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
674                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
675                 zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
676                 zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
677                 zfcp_dbf_out(&p, "unit_status", "0x%08x", r->u.trigger.us);
678                 break;
679         case ZFCP_REC_DBF_ID_ACTION:
680                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
681                 zfcp_dbf_out(&p, "fsf_req", "0x%016Lx", r->u.action.fsf_req);
682                 zfcp_dbf_out(&p, "status", "0x%08Lx", r->u.action.status);
683                 zfcp_dbf_out(&p, "step", "0x%08Lx", r->u.action.step);
684                 break;
685         }
686         p += sprintf(p, "\n");
687         return p - buf;
688 }
689
690 static struct debug_view zfcp_rec_dbf_view = {
691         "structured",
692         NULL,
693         &zfcp_dbf_view_header,
694         &zfcp_rec_dbf_view_format,
695         NULL,
696         NULL
697 };
698
699 /**
700  * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
701  * @id2: identifier for event
702  * @adapter: adapter
703  * This function assumes that the caller is holding erp_lock.
704  */
705 void zfcp_rec_dbf_event_thread(u8 id2, struct zfcp_adapter *adapter)
706 {
707         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
708         unsigned long flags = 0;
709         struct list_head *entry;
710         unsigned ready = 0, running = 0, total;
711
712         list_for_each(entry, &adapter->erp_ready_head)
713                 ready++;
714         list_for_each(entry, &adapter->erp_running_head)
715                 running++;
716         total = adapter->erp_total_count;
717
718         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
719         memset(r, 0, sizeof(*r));
720         r->id = ZFCP_REC_DBF_ID_THREAD;
721         r->id2 = id2;
722         r->u.thread.total = total;
723         r->u.thread.ready = ready;
724         r->u.thread.running = running;
725         debug_event(adapter->rec_dbf, 6, r, sizeof(*r));
726         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
727 }
728
729 /**
730  * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
731  * @id2: identifier for event
732  * @adapter: adapter
733  * This function assumes that the caller does not hold erp_lock.
734  */
735 void zfcp_rec_dbf_event_thread_lock(u8 id2, struct zfcp_adapter *adapter)
736 {
737         unsigned long flags;
738
739         read_lock_irqsave(&adapter->erp_lock, flags);
740         zfcp_rec_dbf_event_thread(id2, adapter);
741         read_unlock_irqrestore(&adapter->erp_lock, flags);
742 }
743
744 static void zfcp_rec_dbf_event_target(u8 id2, void *ref,
745                                       struct zfcp_adapter *adapter,
746                                       atomic_t *status, atomic_t *erp_count,
747                                       u64 wwpn, u32 d_id, u64 fcp_lun)
748 {
749         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
750         unsigned long flags;
751
752         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
753         memset(r, 0, sizeof(*r));
754         r->id = ZFCP_REC_DBF_ID_TARGET;
755         r->id2 = id2;
756         r->u.target.ref = (unsigned long)ref;
757         r->u.target.status = atomic_read(status);
758         r->u.target.wwpn = wwpn;
759         r->u.target.d_id = d_id;
760         r->u.target.fcp_lun = fcp_lun;
761         r->u.target.erp_count = atomic_read(erp_count);
762         debug_event(adapter->rec_dbf, 3, r, sizeof(*r));
763         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
764 }
765
766 /**
767  * zfcp_rec_dbf_event_adapter - trace event for adapter state change
768  * @id: identifier for trigger of state change
769  * @ref: additional reference (e.g. request)
770  * @adapter: adapter
771  */
772 void zfcp_rec_dbf_event_adapter(u8 id, void *ref, struct zfcp_adapter *adapter)
773 {
774         zfcp_rec_dbf_event_target(id, ref, adapter, &adapter->status,
775                                   &adapter->erp_counter, 0, 0, 0);
776 }
777
778 /**
779  * zfcp_rec_dbf_event_port - trace event for port state change
780  * @id: identifier for trigger of state change
781  * @ref: additional reference (e.g. request)
782  * @port: port
783  */
784 void zfcp_rec_dbf_event_port(u8 id, void *ref, struct zfcp_port *port)
785 {
786         struct zfcp_adapter *adapter = port->adapter;
787
788         zfcp_rec_dbf_event_target(id, ref, adapter, &port->status,
789                                   &port->erp_counter, port->wwpn, port->d_id,
790                                   0);
791 }
792
793 /**
794  * zfcp_rec_dbf_event_unit - trace event for unit state change
795  * @id: identifier for trigger of state change
796  * @ref: additional reference (e.g. request)
797  * @unit: unit
798  */
799 void zfcp_rec_dbf_event_unit(u8 id, void *ref, struct zfcp_unit *unit)
800 {
801         struct zfcp_port *port = unit->port;
802         struct zfcp_adapter *adapter = port->adapter;
803
804         zfcp_rec_dbf_event_target(id, ref, adapter, &unit->status,
805                                   &unit->erp_counter, port->wwpn, port->d_id,
806                                   unit->fcp_lun);
807 }
808
809 /**
810  * zfcp_rec_dbf_event_trigger - trace event for triggered error recovery
811  * @id2: identifier for error recovery trigger
812  * @ref: additional reference (e.g. request)
813  * @want: originally requested error recovery action
814  * @need: error recovery action actually initiated
815  * @action: address of error recovery action struct
816  * @adapter: adapter
817  * @port: port
818  * @unit: unit
819  */
820 void zfcp_rec_dbf_event_trigger(u8 id2, void *ref, u8 want, u8 need,
821                                 void *action, struct zfcp_adapter *adapter,
822                                 struct zfcp_port *port, struct zfcp_unit *unit)
823 {
824         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
825         unsigned long flags;
826
827         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
828         memset(r, 0, sizeof(*r));
829         r->id = ZFCP_REC_DBF_ID_TRIGGER;
830         r->id2 = id2;
831         r->u.trigger.ref = (unsigned long)ref;
832         r->u.trigger.want = want;
833         r->u.trigger.need = need;
834         r->u.trigger.action = (unsigned long)action;
835         r->u.trigger.as = atomic_read(&adapter->status);
836         if (port) {
837                 r->u.trigger.ps = atomic_read(&port->status);
838                 r->u.trigger.wwpn = port->wwpn;
839         }
840         if (unit) {
841                 r->u.trigger.us = atomic_read(&unit->status);
842                 r->u.trigger.fcp_lun = unit->fcp_lun;
843         }
844         debug_event(adapter->rec_dbf, action ? 1 : 4, r, sizeof(*r));
845         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
846 }
847
848 /**
849  * zfcp_rec_dbf_event_action - trace event showing progress of recovery action
850  * @id2: identifier
851  * @erp_action: error recovery action struct pointer
852  */
853 void zfcp_rec_dbf_event_action(u8 id2, struct zfcp_erp_action *erp_action)
854 {
855         struct zfcp_adapter *adapter = erp_action->adapter;
856         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
857         unsigned long flags;
858
859         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
860         memset(r, 0, sizeof(*r));
861         r->id = ZFCP_REC_DBF_ID_ACTION;
862         r->id2 = id2;
863         r->u.action.action = (unsigned long)erp_action;
864         r->u.action.status = erp_action->status;
865         r->u.action.step = erp_action->step;
866         r->u.action.fsf_req = (unsigned long)erp_action->fsf_req;
867         debug_event(adapter->rec_dbf, 5, r, sizeof(*r));
868         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
869 }
870
871 /**
872  * zfcp_san_dbf_event_ct_request - trace event for issued CT request
873  * @fsf_req: request containing issued CT data
874  */
875 void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
876 {
877         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
878         struct zfcp_wka_port *wka_port = ct->wka_port;
879         struct zfcp_adapter *adapter = wka_port->adapter;
880         struct ct_hdr *hdr = sg_virt(ct->req);
881         struct zfcp_san_dbf_record *r = &adapter->san_dbf_buf;
882         struct zfcp_san_dbf_record_ct_request *oct = &r->u.ct_req;
883         unsigned long flags;
884
885         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
886         memset(r, 0, sizeof(*r));
887         strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
888         r->fsf_reqid = (unsigned long)fsf_req;
889         r->fsf_seqno = fsf_req->seq_no;
890         r->s_id = fc_host_port_id(adapter->scsi_host);
891         r->d_id = wka_port->d_id;
892         oct->cmd_req_code = hdr->cmd_rsp_code;
893         oct->revision = hdr->revision;
894         oct->gs_type = hdr->gs_type;
895         oct->gs_subtype = hdr->gs_subtype;
896         oct->options = hdr->options;
897         oct->max_res_size = hdr->max_res_size;
898         oct->len = min((int)ct->req->length - (int)sizeof(struct ct_hdr),
899                        ZFCP_DBF_CT_PAYLOAD);
900         memcpy(oct->payload, (void *)hdr + sizeof(struct ct_hdr), oct->len);
901         debug_event(adapter->san_dbf, 3, r, sizeof(*r));
902         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
903 }
904
905 /**
906  * zfcp_san_dbf_event_ct_response - trace event for completion of CT request
907  * @fsf_req: request containing CT response
908  */
909 void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
910 {
911         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
912         struct zfcp_wka_port *wka_port = ct->wka_port;
913         struct zfcp_adapter *adapter = wka_port->adapter;
914         struct ct_hdr *hdr = sg_virt(ct->resp);
915         struct zfcp_san_dbf_record *r = &adapter->san_dbf_buf;
916         struct zfcp_san_dbf_record_ct_response *rct = &r->u.ct_resp;
917         unsigned long flags;
918
919         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
920         memset(r, 0, sizeof(*r));
921         strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
922         r->fsf_reqid = (unsigned long)fsf_req;
923         r->fsf_seqno = fsf_req->seq_no;
924         r->s_id = wka_port->d_id;
925         r->d_id = fc_host_port_id(adapter->scsi_host);
926         rct->cmd_rsp_code = hdr->cmd_rsp_code;
927         rct->revision = hdr->revision;
928         rct->reason_code = hdr->reason_code;
929         rct->expl = hdr->reason_code_expl;
930         rct->vendor_unique = hdr->vendor_unique;
931         rct->len = min((int)ct->resp->length - (int)sizeof(struct ct_hdr),
932                        ZFCP_DBF_CT_PAYLOAD);
933         memcpy(rct->payload, (void *)hdr + sizeof(struct ct_hdr), rct->len);
934         debug_event(adapter->san_dbf, 3, r, sizeof(*r));
935         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
936 }
937
938 static void zfcp_san_dbf_event_els(const char *tag, int level,
939                                    struct zfcp_fsf_req *fsf_req, u32 s_id,
940                                    u32 d_id, u8 ls_code, void *buffer,
941                                    int buflen)
942 {
943         struct zfcp_adapter *adapter = fsf_req->adapter;
944         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
945         unsigned long flags;
946
947         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
948         memset(rec, 0, sizeof(*rec));
949         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
950         rec->fsf_reqid = (unsigned long)fsf_req;
951         rec->fsf_seqno = fsf_req->seq_no;
952         rec->s_id = s_id;
953         rec->d_id = d_id;
954         rec->u.els.ls_code = ls_code;
955         debug_event(adapter->san_dbf, level, rec, sizeof(*rec));
956         zfcp_dbf_hexdump(adapter->san_dbf, rec, sizeof(*rec), level,
957                          buffer, min(buflen, ZFCP_DBF_ELS_MAX_PAYLOAD));
958         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
959 }
960
961 /**
962  * zfcp_san_dbf_event_els_request - trace event for issued ELS
963  * @fsf_req: request containing issued ELS
964  */
965 void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
966 {
967         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
968
969         zfcp_san_dbf_event_els("oels", 2, fsf_req,
970                                fc_host_port_id(els->adapter->scsi_host),
971                                els->d_id, *(u8 *) sg_virt(els->req),
972                                sg_virt(els->req), els->req->length);
973 }
974
975 /**
976  * zfcp_san_dbf_event_els_response - trace event for completed ELS
977  * @fsf_req: request containing ELS response
978  */
979 void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
980 {
981         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
982
983         zfcp_san_dbf_event_els("rels", 2, fsf_req, els->d_id,
984                                fc_host_port_id(els->adapter->scsi_host),
985                                *(u8 *)sg_virt(els->req), sg_virt(els->resp),
986                                els->resp->length);
987 }
988
989 /**
990  * zfcp_san_dbf_event_incoming_els - trace event for incomig ELS
991  * @fsf_req: request containing unsolicited status buffer with incoming ELS
992  */
993 void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
994 {
995         struct zfcp_adapter *adapter = fsf_req->adapter;
996         struct fsf_status_read_buffer *buf =
997                         (struct fsf_status_read_buffer *)fsf_req->data;
998         int length = (int)buf->length -
999                      (int)((void *)&buf->payload - (void *)buf);
1000
1001         zfcp_san_dbf_event_els("iels", 1, fsf_req, buf->d_id,
1002                                fc_host_port_id(adapter->scsi_host),
1003                                buf->payload.data[0], (void *)buf->payload.data,
1004                                length);
1005 }
1006
1007 static int zfcp_san_dbf_view_format(debug_info_t *id, struct debug_view *view,
1008                                     char *out_buf, const char *in_buf)
1009 {
1010         struct zfcp_san_dbf_record *r = (struct zfcp_san_dbf_record *)in_buf;
1011         char *buffer = NULL;
1012         int buflen = 0, total = 0;
1013         char *p = out_buf;
1014
1015         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
1016                 return 0;
1017
1018         zfcp_dbf_tag(&p, "tag", r->tag);
1019         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
1020         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
1021         zfcp_dbf_out(&p, "s_id", "0x%06x", r->s_id);
1022         zfcp_dbf_out(&p, "d_id", "0x%06x", r->d_id);
1023
1024         if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
1025                 struct zfcp_san_dbf_record_ct_request *ct = &r->u.ct_req;
1026                 zfcp_dbf_out(&p, "cmd_req_code", "0x%04x", ct->cmd_req_code);
1027                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
1028                 zfcp_dbf_out(&p, "gs_type", "0x%02x", ct->gs_type);
1029                 zfcp_dbf_out(&p, "gs_subtype", "0x%02x", ct->gs_subtype);
1030                 zfcp_dbf_out(&p, "options", "0x%02x", ct->options);
1031                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
1032                 total = ct->len;
1033                 buffer = ct->payload;
1034                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
1035         } else if (strncmp(r->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
1036                 struct zfcp_san_dbf_record_ct_response *ct = &r->u.ct_resp;
1037                 zfcp_dbf_out(&p, "cmd_rsp_code", "0x%04x", ct->cmd_rsp_code);
1038                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
1039                 zfcp_dbf_out(&p, "reason_code", "0x%02x", ct->reason_code);
1040                 zfcp_dbf_out(&p, "reason_code_expl", "0x%02x", ct->expl);
1041                 zfcp_dbf_out(&p, "vendor_unique", "0x%02x", ct->vendor_unique);
1042                 total = ct->len;
1043                 buffer = ct->payload;
1044                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
1045         } else if (strncmp(r->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
1046                    strncmp(r->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
1047                    strncmp(r->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
1048                 struct zfcp_san_dbf_record_els *els = &r->u.els;
1049                 zfcp_dbf_out(&p, "ls_code", "0x%02x", els->ls_code);
1050                 total = els->len;
1051                 buffer = els->payload;
1052                 buflen = min(total, ZFCP_DBF_ELS_PAYLOAD);
1053         }
1054
1055         zfcp_dbf_outd(&p, "payload", buffer, buflen, 0, total);
1056         if (buflen == total)
1057                 p += sprintf(p, "\n");
1058
1059         return p - out_buf;
1060 }
1061
1062 static struct debug_view zfcp_san_dbf_view = {
1063         "structured",
1064         NULL,
1065         &zfcp_dbf_view_header,
1066         &zfcp_san_dbf_view_format,
1067         NULL,
1068         NULL
1069 };
1070
1071 static void zfcp_scsi_dbf_event(const char *tag, const char *tag2, int level,
1072                                 struct zfcp_adapter *adapter,
1073                                 struct scsi_cmnd *scsi_cmnd,
1074                                 struct zfcp_fsf_req *fsf_req,
1075                                 unsigned long old_req_id)
1076 {
1077         struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
1078         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
1079         unsigned long flags;
1080         struct fcp_rsp_iu *fcp_rsp;
1081         char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
1082         int offset = 0, buflen = 0;
1083
1084         spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
1085         do {
1086                 memset(rec, 0, sizeof(*rec));
1087                 if (offset == 0) {
1088                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
1089                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
1090                         if (scsi_cmnd != NULL) {
1091                                 if (scsi_cmnd->device) {
1092                                         rec->scsi_id = scsi_cmnd->device->id;
1093                                         rec->scsi_lun = scsi_cmnd->device->lun;
1094                                 }
1095                                 rec->scsi_result = scsi_cmnd->result;
1096                                 rec->scsi_cmnd = (unsigned long)scsi_cmnd;
1097                                 rec->scsi_serial = scsi_cmnd->serial_number;
1098                                 memcpy(rec->scsi_opcode, scsi_cmnd->cmnd,
1099                                         min((int)scsi_cmnd->cmd_len,
1100                                                 ZFCP_DBF_SCSI_OPCODE));
1101                                 rec->scsi_retries = scsi_cmnd->retries;
1102                                 rec->scsi_allowed = scsi_cmnd->allowed;
1103                         }
1104                         if (fsf_req != NULL) {
1105                                 fcp_rsp = (struct fcp_rsp_iu *)
1106                                     &(fsf_req->qtcb->bottom.io.fcp_rsp);
1107                                 fcp_rsp_info = (unsigned char *) &fcp_rsp[1];
1108                                 fcp_sns_info =
1109                                     zfcp_get_fcp_sns_info_ptr(fcp_rsp);
1110
1111                                 rec->rsp_validity = fcp_rsp->validity.value;
1112                                 rec->rsp_scsi_status = fcp_rsp->scsi_status;
1113                                 rec->rsp_resid = fcp_rsp->fcp_resid;
1114                                 if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
1115                                         rec->rsp_code = *(fcp_rsp_info + 3);
1116                                 if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
1117                                         buflen = min((int)fcp_rsp->fcp_sns_len,
1118                                                      ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
1119                                         rec->sns_info_len = buflen;
1120                                         memcpy(rec->sns_info, fcp_sns_info,
1121                                                min(buflen,
1122                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
1123                                         offset += min(buflen,
1124                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
1125                                 }
1126
1127                                 rec->fsf_reqid = (unsigned long)fsf_req;
1128                                 rec->fsf_seqno = fsf_req->seq_no;
1129                                 rec->fsf_issued = fsf_req->issued;
1130                         }
1131                         rec->old_fsf_reqid = old_req_id;
1132                 } else {
1133                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
1134                         dump->total_size = buflen;
1135                         dump->offset = offset;
1136                         dump->size = min(buflen - offset,
1137                                          (int)sizeof(struct
1138                                                      zfcp_scsi_dbf_record) -
1139                                          (int)sizeof(struct zfcp_dbf_dump));
1140                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
1141                         offset += dump->size;
1142                 }
1143                 debug_event(adapter->scsi_dbf, level, rec, sizeof(*rec));
1144         } while (offset < buflen);
1145         spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
1146 }
1147
1148 /**
1149  * zfcp_scsi_dbf_event_result - trace event for SCSI command completion
1150  * @tag: tag indicating success or failure of SCSI command
1151  * @level: trace level applicable for this event
1152  * @adapter: adapter that has been used to issue the SCSI command
1153  * @scsi_cmnd: SCSI command pointer
1154  * @fsf_req: request used to issue SCSI command (might be NULL)
1155  */
1156 void zfcp_scsi_dbf_event_result(const char *tag, int level,
1157                                 struct zfcp_adapter *adapter,
1158                                 struct scsi_cmnd *scsi_cmnd,
1159                                 struct zfcp_fsf_req *fsf_req)
1160 {
1161         zfcp_scsi_dbf_event("rslt", tag, level, adapter, scsi_cmnd, fsf_req, 0);
1162 }
1163
1164 /**
1165  * zfcp_scsi_dbf_event_abort - trace event for SCSI command abort
1166  * @tag: tag indicating success or failure of abort operation
1167  * @adapter: adapter thas has been used to issue SCSI command to be aborted
1168  * @scsi_cmnd: SCSI command to be aborted
1169  * @new_fsf_req: request containing abort (might be NULL)
1170  * @old_req_id: identifier of request containg SCSI command to be aborted
1171  */
1172 void zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
1173                                struct scsi_cmnd *scsi_cmnd,
1174                                struct zfcp_fsf_req *new_fsf_req,
1175                                unsigned long old_req_id)
1176 {
1177         zfcp_scsi_dbf_event("abrt", tag, 1, adapter, scsi_cmnd, new_fsf_req,
1178                             old_req_id);
1179 }
1180
1181 /**
1182  * zfcp_scsi_dbf_event_devreset - trace event for Logical Unit or Target Reset
1183  * @tag: tag indicating success or failure of reset operation
1184  * @flag: indicates type of reset (Target Reset, Logical Unit Reset)
1185  * @unit: unit that needs reset
1186  * @scsi_cmnd: SCSI command which caused this error recovery
1187  */
1188 void zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag,
1189                                   struct zfcp_unit *unit,
1190                                   struct scsi_cmnd *scsi_cmnd)
1191 {
1192         zfcp_scsi_dbf_event(flag == FCP_TARGET_RESET ? "trst" : "lrst", tag, 1,
1193                             unit->port->adapter, scsi_cmnd, NULL, 0);
1194 }
1195
1196 static int zfcp_scsi_dbf_view_format(debug_info_t *id, struct debug_view *view,
1197                                      char *out_buf, const char *in_buf)
1198 {
1199         struct zfcp_scsi_dbf_record *r = (struct zfcp_scsi_dbf_record *)in_buf;
1200         struct timespec t;
1201         char *p = out_buf;
1202
1203         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
1204                 return 0;
1205
1206         zfcp_dbf_tag(&p, "tag", r->tag);
1207         zfcp_dbf_tag(&p, "tag2", r->tag2);
1208         zfcp_dbf_out(&p, "scsi_id", "0x%08x", r->scsi_id);
1209         zfcp_dbf_out(&p, "scsi_lun", "0x%08x", r->scsi_lun);
1210         zfcp_dbf_out(&p, "scsi_result", "0x%08x", r->scsi_result);
1211         zfcp_dbf_out(&p, "scsi_cmnd", "0x%0Lx", r->scsi_cmnd);
1212         zfcp_dbf_out(&p, "scsi_serial", "0x%016Lx", r->scsi_serial);
1213         zfcp_dbf_outd(&p, "scsi_opcode", r->scsi_opcode, ZFCP_DBF_SCSI_OPCODE,
1214                       0, ZFCP_DBF_SCSI_OPCODE);
1215         zfcp_dbf_out(&p, "scsi_retries", "0x%02x", r->scsi_retries);
1216         zfcp_dbf_out(&p, "scsi_allowed", "0x%02x", r->scsi_allowed);
1217         if (strncmp(r->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0)
1218                 zfcp_dbf_out(&p, "old_fsf_reqid", "0x%0Lx", r->old_fsf_reqid);
1219         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
1220         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
1221         zfcp_dbf_timestamp(r->fsf_issued, &t);
1222         zfcp_dbf_out(&p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
1223
1224         if (strncmp(r->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
1225                 zfcp_dbf_out(&p, "fcp_rsp_validity", "0x%02x", r->rsp_validity);
1226                 zfcp_dbf_out(&p, "fcp_rsp_scsi_status", "0x%02x",
1227                              r->rsp_scsi_status);
1228                 zfcp_dbf_out(&p, "fcp_rsp_resid", "0x%08x", r->rsp_resid);
1229                 zfcp_dbf_out(&p, "fcp_rsp_code", "0x%08x", r->rsp_code);
1230                 zfcp_dbf_out(&p, "fcp_sns_info_len", "0x%08x", r->sns_info_len);
1231                 zfcp_dbf_outd(&p, "fcp_sns_info", r->sns_info,
1232                               min((int)r->sns_info_len,
1233                               ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
1234                               r->sns_info_len);
1235         }
1236         p += sprintf(p, "\n");
1237         return p - out_buf;
1238 }
1239
1240 static struct debug_view zfcp_scsi_dbf_view = {
1241         "structured",
1242         NULL,
1243         &zfcp_dbf_view_header,
1244         &zfcp_scsi_dbf_view_format,
1245         NULL,
1246         NULL
1247 };
1248
1249 /**
1250  * zfcp_adapter_debug_register - registers debug feature for an adapter
1251  * @adapter: pointer to adapter for which debug features should be registered
1252  * return: -ENOMEM on error, 0 otherwise
1253  */
1254 int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
1255 {
1256         char dbf_name[DEBUG_MAX_NAME_LEN];
1257
1258         /* debug feature area which records recovery activity */
1259         sprintf(dbf_name, "zfcp_%s_rec", zfcp_get_busid_by_adapter(adapter));
1260         adapter->rec_dbf = debug_register(dbf_name, dbfsize, 1,
1261                                           sizeof(struct zfcp_rec_dbf_record));
1262         if (!adapter->rec_dbf)
1263                 goto failed;
1264         debug_register_view(adapter->rec_dbf, &debug_hex_ascii_view);
1265         debug_register_view(adapter->rec_dbf, &zfcp_rec_dbf_view);
1266         debug_set_level(adapter->rec_dbf, 3);
1267
1268         /* debug feature area which records HBA (FSF and QDIO) conditions */
1269         sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter));
1270         adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
1271                                           sizeof(struct zfcp_hba_dbf_record));
1272         if (!adapter->hba_dbf)
1273                 goto failed;
1274         debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
1275         debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
1276         debug_set_level(adapter->hba_dbf, 3);
1277
1278         /* debug feature area which records SAN command failures and recovery */
1279         sprintf(dbf_name, "zfcp_%s_san", zfcp_get_busid_by_adapter(adapter));
1280         adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
1281                                           sizeof(struct zfcp_san_dbf_record));
1282         if (!adapter->san_dbf)
1283                 goto failed;
1284         debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
1285         debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
1286         debug_set_level(adapter->san_dbf, 6);
1287
1288         /* debug feature area which records SCSI command failures and recovery */
1289         sprintf(dbf_name, "zfcp_%s_scsi", zfcp_get_busid_by_adapter(adapter));
1290         adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
1291                                            sizeof(struct zfcp_scsi_dbf_record));
1292         if (!adapter->scsi_dbf)
1293                 goto failed;
1294         debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
1295         debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
1296         debug_set_level(adapter->scsi_dbf, 3);
1297
1298         return 0;
1299
1300  failed:
1301         zfcp_adapter_debug_unregister(adapter);
1302
1303         return -ENOMEM;
1304 }
1305
1306 /**
1307  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
1308  * @adapter: pointer to adapter for which debug features should be unregistered
1309  */
1310 void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
1311 {
1312         debug_unregister(adapter->scsi_dbf);
1313         debug_unregister(adapter->san_dbf);
1314         debug_unregister(adapter->hba_dbf);
1315         debug_unregister(adapter->rec_dbf);
1316         adapter->scsi_dbf = NULL;
1317         adapter->san_dbf = NULL;
1318         adapter->hba_dbf = NULL;
1319         adapter->rec_dbf = NULL;
1320 }