Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq
[linux-2.6] / 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 static void zfcp_hba_dbf_view_response(char **p,
322                                        struct zfcp_hba_dbf_record_response *r)
323 {
324         struct timespec t;
325
326         zfcp_dbf_out(p, "fsf_command", "0x%08x", r->fsf_command);
327         zfcp_dbf_out(p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
328         zfcp_dbf_out(p, "fsf_seqno", "0x%08x", r->fsf_seqno);
329         zfcp_dbf_timestamp(r->fsf_issued, &t);
330         zfcp_dbf_out(p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
331         zfcp_dbf_out(p, "fsf_prot_status", "0x%08x", r->fsf_prot_status);
332         zfcp_dbf_out(p, "fsf_status", "0x%08x", r->fsf_status);
333         zfcp_dbf_outd(p, "fsf_prot_status_qual", r->fsf_prot_status_qual,
334                       FSF_PROT_STATUS_QUAL_SIZE, 0, FSF_PROT_STATUS_QUAL_SIZE);
335         zfcp_dbf_outd(p, "fsf_status_qual", r->fsf_status_qual,
336                       FSF_STATUS_QUALIFIER_SIZE, 0, FSF_STATUS_QUALIFIER_SIZE);
337         zfcp_dbf_out(p, "fsf_req_status", "0x%08x", r->fsf_req_status);
338         zfcp_dbf_out(p, "sbal_first", "0x%02x", r->sbal_first);
339         zfcp_dbf_out(p, "sbal_last", "0x%02x", r->sbal_last);
340         zfcp_dbf_out(p, "sbal_response", "0x%02x", r->sbal_response);
341         zfcp_dbf_out(p, "pool", "0x%02x", r->pool);
342
343         switch (r->fsf_command) {
344         case FSF_QTCB_FCP_CMND:
345                 if (r->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
346                         break;
347                 zfcp_dbf_out(p, "scsi_cmnd", "0x%0Lx", r->u.fcp.cmnd);
348                 zfcp_dbf_out(p, "scsi_serial", "0x%016Lx", r->u.fcp.serial);
349                 break;
350
351         case FSF_QTCB_OPEN_PORT_WITH_DID:
352         case FSF_QTCB_CLOSE_PORT:
353         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
354                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.port.wwpn);
355                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.port.d_id);
356                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.port.port_handle);
357                 break;
358
359         case FSF_QTCB_OPEN_LUN:
360         case FSF_QTCB_CLOSE_LUN:
361                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.unit.wwpn);
362                 zfcp_dbf_out(p, "fcp_lun", "0x%016Lx", r->u.unit.fcp_lun);
363                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.unit.port_handle);
364                 zfcp_dbf_out(p, "lun_handle", "0x%08x", r->u.unit.lun_handle);
365                 break;
366
367         case FSF_QTCB_SEND_ELS:
368                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.els.d_id);
369                 zfcp_dbf_out(p, "ls_code", "0x%02x", r->u.els.ls_code);
370                 break;
371
372         case FSF_QTCB_ABORT_FCP_CMND:
373         case FSF_QTCB_SEND_GENERIC:
374         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
375         case FSF_QTCB_EXCHANGE_PORT_DATA:
376         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
377         case FSF_QTCB_UPLOAD_CONTROL_FILE:
378                 break;
379         }
380 }
381
382 static void zfcp_hba_dbf_view_status(char **p,
383                                      struct zfcp_hba_dbf_record_status *r)
384 {
385         zfcp_dbf_out(p, "failed", "0x%02x", r->failed);
386         zfcp_dbf_out(p, "status_type", "0x%08x", r->status_type);
387         zfcp_dbf_out(p, "status_subtype", "0x%08x", r->status_subtype);
388         zfcp_dbf_outd(p, "queue_designator", (char *)&r->queue_designator,
389                       sizeof(struct fsf_queue_designator), 0,
390                       sizeof(struct fsf_queue_designator));
391         zfcp_dbf_outd(p, "payload", (char *)&r->payload, r->payload_size, 0,
392                       r->payload_size);
393 }
394
395 static void zfcp_hba_dbf_view_qdio(char **p, struct zfcp_hba_dbf_record_qdio *r)
396 {
397         zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
398         zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
399         zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
400 }
401
402 static int zfcp_hba_dbf_view_format(debug_info_t *id, struct debug_view *view,
403                                     char *out_buf, const char *in_buf)
404 {
405         struct zfcp_hba_dbf_record *r = (struct zfcp_hba_dbf_record *)in_buf;
406         char *p = out_buf;
407
408         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
409                 return 0;
410
411         zfcp_dbf_tag(&p, "tag", r->tag);
412         if (isalpha(r->tag2[0]))
413                 zfcp_dbf_tag(&p, "tag2", r->tag2);
414
415         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
416                 zfcp_hba_dbf_view_response(&p, &r->u.response);
417         else if (strncmp(r->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
418                 zfcp_hba_dbf_view_status(&p, &r->u.status);
419         else if (strncmp(r->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
420                 zfcp_hba_dbf_view_qdio(&p, &r->u.qdio);
421
422         p += sprintf(p, "\n");
423         return p - out_buf;
424 }
425
426 static struct debug_view zfcp_hba_dbf_view = {
427         "structured",
428         NULL,
429         &zfcp_dbf_view_header,
430         &zfcp_hba_dbf_view_format,
431         NULL,
432         NULL
433 };
434
435 static const char *zfcp_rec_dbf_tags[] = {
436         [ZFCP_REC_DBF_ID_THREAD] = "thread",
437         [ZFCP_REC_DBF_ID_TARGET] = "target",
438         [ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
439         [ZFCP_REC_DBF_ID_ACTION] = "action",
440 };
441
442 static const char *zfcp_rec_dbf_ids[] = {
443         [1]     = "new",
444         [2]     = "ready",
445         [3]     = "kill",
446         [4]     = "down sleep",
447         [5]     = "down wakeup",
448         [6]     = "down sleep ecd",
449         [7]     = "down wakeup ecd",
450         [8]     = "down sleep epd",
451         [9]     = "down wakeup epd",
452         [10]    = "online",
453         [11]    = "operational",
454         [12]    = "scsi slave destroy",
455         [13]    = "propagate failed adapter",
456         [14]    = "propagate failed port",
457         [15]    = "block adapter",
458         [16]    = "unblock adapter",
459         [17]    = "block port",
460         [18]    = "unblock port",
461         [19]    = "block unit",
462         [20]    = "unblock unit",
463         [21]    = "unit recovery failed",
464         [22]    = "port recovery failed",
465         [23]    = "adapter recovery failed",
466         [24]    = "qdio queues down",
467         [25]    = "p2p failed",
468         [26]    = "nameserver lookup failed",
469         [27]    = "nameserver port failed",
470         [28]    = "link up",
471         [29]    = "link down",
472         [30]    = "link up status read",
473         [31]    = "open port failed",
474         [32]    = "open port failed",
475         [33]    = "close port",
476         [34]    = "open unit failed",
477         [35]    = "exclusive open unit failed",
478         [36]    = "shared open unit failed",
479         [37]    = "link down",
480         [38]    = "link down status read no link",
481         [39]    = "link down status read fdisc login",
482         [40]    = "link down status read firmware update",
483         [41]    = "link down status read unknown reason",
484         [42]    = "link down ecd incomplete",
485         [43]    = "link down epd incomplete",
486         [44]    = "sysfs adapter recovery",
487         [45]    = "sysfs port recovery",
488         [46]    = "sysfs unit recovery",
489         [47]    = "port boxed abort",
490         [48]    = "unit boxed abort",
491         [49]    = "port boxed ct",
492         [50]    = "port boxed close physical",
493         [51]    = "port boxed open unit",
494         [52]    = "port boxed close unit",
495         [53]    = "port boxed fcp",
496         [54]    = "unit boxed fcp",
497         [55]    = "port access denied",
498         [56]    = "",
499         [57]    = "",
500         [58]    = "",
501         [59]    = "unit access denied",
502         [60]    = "shared unit access denied open unit",
503         [61]    = "",
504         [62]    = "request timeout",
505         [63]    = "adisc link test reject or timeout",
506         [64]    = "adisc link test d_id changed",
507         [65]    = "adisc link test failed",
508         [66]    = "recovery out of memory",
509         [67]    = "adapter recovery repeated after state change",
510         [68]    = "port recovery repeated after state change",
511         [69]    = "unit recovery repeated after state change",
512         [70]    = "port recovery follow-up after successful adapter recovery",
513         [71]    = "adapter recovery escalation after failed adapter recovery",
514         [72]    = "port recovery follow-up after successful physical port "
515                   "recovery",
516         [73]    = "adapter recovery escalation after failed physical port "
517                   "recovery",
518         [74]    = "unit recovery follow-up after successful port recovery",
519         [75]    = "physical port recovery escalation after failed port "
520                   "recovery",
521         [76]    = "port recovery escalation after failed unit recovery",
522         [77]    = "recovery opening nameserver port",
523         [78]    = "duplicate request id",
524         [79]    = "link down",
525         [80]    = "exclusive read-only unit access unsupported",
526         [81]    = "shared read-write unit access unsupported",
527         [82]    = "incoming rscn",
528         [83]    = "incoming wwpn",
529         [84]    = "",
530         [85]    = "online",
531         [86]    = "offline",
532         [87]    = "ccw device gone",
533         [88]    = "ccw device no path",
534         [89]    = "ccw device operational",
535         [90]    = "ccw device shutdown",
536         [91]    = "sysfs port addition",
537         [92]    = "sysfs port removal",
538         [93]    = "sysfs adapter recovery",
539         [94]    = "sysfs unit addition",
540         [95]    = "sysfs unit removal",
541         [96]    = "sysfs port recovery",
542         [97]    = "sysfs unit recovery",
543         [98]    = "sequence number mismatch",
544         [99]    = "link up",
545         [100]   = "error state",
546         [101]   = "status read physical port closed",
547         [102]   = "link up status read",
548         [103]   = "too many failed status read buffers",
549         [104]   = "port handle not valid abort",
550         [105]   = "lun handle not valid abort",
551         [106]   = "port handle not valid ct",
552         [107]   = "port handle not valid close port",
553         [108]   = "port handle not valid close physical port",
554         [109]   = "port handle not valid open unit",
555         [110]   = "port handle not valid close unit",
556         [111]   = "lun handle not valid close unit",
557         [112]   = "port handle not valid fcp",
558         [113]   = "lun handle not valid fcp",
559         [114]   = "handle mismatch fcp",
560         [115]   = "lun not valid fcp",
561         [116]   = "qdio send failed",
562         [117]   = "version mismatch",
563         [118]   = "incompatible qtcb type",
564         [119]   = "unknown protocol status",
565         [120]   = "unknown fsf command",
566         [121]   = "no recommendation for status qualifier",
567         [122]   = "status read physical port closed in error",
568         [123]   = "fc service class not supported",
569         [124]   = "",
570         [125]   = "need newer zfcp",
571         [126]   = "need newer microcode",
572         [127]   = "arbitrated loop not supported",
573         [128]   = "unknown topology",
574         [129]   = "qtcb size mismatch",
575         [130]   = "unknown fsf status ecd",
576         [131]   = "fcp request too big",
577         [132]   = "",
578         [133]   = "data direction not valid fcp",
579         [134]   = "command length not valid fcp",
580         [135]   = "status read act update",
581         [136]   = "status read cfdc update",
582         [137]   = "hbaapi port open",
583         [138]   = "hbaapi unit open",
584         [139]   = "hbaapi unit shutdown",
585         [140]   = "qdio error outbound",
586         [141]   = "scsi host reset",
587         [142]   = "dismissing fsf request for recovery action",
588         [143]   = "recovery action timed out",
589         [144]   = "recovery action gone",
590         [145]   = "recovery action being processed",
591         [146]   = "recovery action ready for next step",
592         [147]   = "qdio error inbound",
593         [148]   = "nameserver needed for port scan",
594         [149]   = "port scan",
595         [150]   = "ptp attach",
596         [151]   = "port validation failed",
597 };
598
599 static int zfcp_rec_dbf_view_format(debug_info_t *id, struct debug_view *view,
600                                     char *buf, const char *_rec)
601 {
602         struct zfcp_rec_dbf_record *r = (struct zfcp_rec_dbf_record *)_rec;
603         char *p = buf;
604
605         zfcp_dbf_outs(&p, "tag", zfcp_rec_dbf_tags[r->id]);
606         zfcp_dbf_outs(&p, "hint", zfcp_rec_dbf_ids[r->id2]);
607         zfcp_dbf_out(&p, "id", "%d", r->id2);
608         switch (r->id) {
609         case ZFCP_REC_DBF_ID_THREAD:
610                 zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
611                 zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
612                 zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
613                 break;
614         case ZFCP_REC_DBF_ID_TARGET:
615                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
616                 zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
617                 zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
618                 zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
619                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
620                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
621                 break;
622         case ZFCP_REC_DBF_ID_TRIGGER:
623                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
624                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
625                 zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
626                 zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
627                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
628                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
629                 zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
630                 zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
631                 zfcp_dbf_out(&p, "unit_status", "0x%08x", r->u.trigger.us);
632                 break;
633         case ZFCP_REC_DBF_ID_ACTION:
634                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
635                 zfcp_dbf_out(&p, "fsf_req", "0x%016Lx", r->u.action.fsf_req);
636                 zfcp_dbf_out(&p, "status", "0x%08Lx", r->u.action.status);
637                 zfcp_dbf_out(&p, "step", "0x%08Lx", r->u.action.step);
638                 break;
639         }
640         p += sprintf(p, "\n");
641         return p - buf;
642 }
643
644 static struct debug_view zfcp_rec_dbf_view = {
645         "structured",
646         NULL,
647         &zfcp_dbf_view_header,
648         &zfcp_rec_dbf_view_format,
649         NULL,
650         NULL
651 };
652
653 /**
654  * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
655  * @id2: identifier for event
656  * @adapter: adapter
657  * This function assumes that the caller is holding erp_lock.
658  */
659 void zfcp_rec_dbf_event_thread(u8 id2, struct zfcp_adapter *adapter)
660 {
661         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
662         unsigned long flags = 0;
663         struct list_head *entry;
664         unsigned ready = 0, running = 0, total;
665
666         list_for_each(entry, &adapter->erp_ready_head)
667                 ready++;
668         list_for_each(entry, &adapter->erp_running_head)
669                 running++;
670         total = adapter->erp_total_count;
671
672         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
673         memset(r, 0, sizeof(*r));
674         r->id = ZFCP_REC_DBF_ID_THREAD;
675         r->id2 = id2;
676         r->u.thread.total = total;
677         r->u.thread.ready = ready;
678         r->u.thread.running = running;
679         debug_event(adapter->rec_dbf, 6, r, sizeof(*r));
680         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
681 }
682
683 /**
684  * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
685  * @id2: identifier for event
686  * @adapter: adapter
687  * This function assumes that the caller does not hold erp_lock.
688  */
689 void zfcp_rec_dbf_event_thread_lock(u8 id2, struct zfcp_adapter *adapter)
690 {
691         unsigned long flags;
692
693         read_lock_irqsave(&adapter->erp_lock, flags);
694         zfcp_rec_dbf_event_thread(id2, adapter);
695         read_unlock_irqrestore(&adapter->erp_lock, flags);
696 }
697
698 static void zfcp_rec_dbf_event_target(u8 id2, void *ref,
699                                       struct zfcp_adapter *adapter,
700                                       atomic_t *status, atomic_t *erp_count,
701                                       u64 wwpn, u32 d_id, u64 fcp_lun)
702 {
703         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
704         unsigned long flags;
705
706         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
707         memset(r, 0, sizeof(*r));
708         r->id = ZFCP_REC_DBF_ID_TARGET;
709         r->id2 = id2;
710         r->u.target.ref = (unsigned long)ref;
711         r->u.target.status = atomic_read(status);
712         r->u.target.wwpn = wwpn;
713         r->u.target.d_id = d_id;
714         r->u.target.fcp_lun = fcp_lun;
715         r->u.target.erp_count = atomic_read(erp_count);
716         debug_event(adapter->rec_dbf, 3, r, sizeof(*r));
717         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
718 }
719
720 /**
721  * zfcp_rec_dbf_event_adapter - trace event for adapter state change
722  * @id: identifier for trigger of state change
723  * @ref: additional reference (e.g. request)
724  * @adapter: adapter
725  */
726 void zfcp_rec_dbf_event_adapter(u8 id, void *ref, struct zfcp_adapter *adapter)
727 {
728         zfcp_rec_dbf_event_target(id, ref, adapter, &adapter->status,
729                                   &adapter->erp_counter, 0, 0, 0);
730 }
731
732 /**
733  * zfcp_rec_dbf_event_port - trace event for port state change
734  * @id: identifier for trigger of state change
735  * @ref: additional reference (e.g. request)
736  * @port: port
737  */
738 void zfcp_rec_dbf_event_port(u8 id, void *ref, struct zfcp_port *port)
739 {
740         struct zfcp_adapter *adapter = port->adapter;
741
742         zfcp_rec_dbf_event_target(id, ref, adapter, &port->status,
743                                   &port->erp_counter, port->wwpn, port->d_id,
744                                   0);
745 }
746
747 /**
748  * zfcp_rec_dbf_event_unit - trace event for unit state change
749  * @id: identifier for trigger of state change
750  * @ref: additional reference (e.g. request)
751  * @unit: unit
752  */
753 void zfcp_rec_dbf_event_unit(u8 id, void *ref, struct zfcp_unit *unit)
754 {
755         struct zfcp_port *port = unit->port;
756         struct zfcp_adapter *adapter = port->adapter;
757
758         zfcp_rec_dbf_event_target(id, ref, adapter, &unit->status,
759                                   &unit->erp_counter, port->wwpn, port->d_id,
760                                   unit->fcp_lun);
761 }
762
763 /**
764  * zfcp_rec_dbf_event_trigger - trace event for triggered error recovery
765  * @id2: identifier for error recovery trigger
766  * @ref: additional reference (e.g. request)
767  * @want: originally requested error recovery action
768  * @need: error recovery action actually initiated
769  * @action: address of error recovery action struct
770  * @adapter: adapter
771  * @port: port
772  * @unit: unit
773  */
774 void zfcp_rec_dbf_event_trigger(u8 id2, void *ref, u8 want, u8 need,
775                                 void *action, struct zfcp_adapter *adapter,
776                                 struct zfcp_port *port, struct zfcp_unit *unit)
777 {
778         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
779         unsigned long flags;
780
781         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
782         memset(r, 0, sizeof(*r));
783         r->id = ZFCP_REC_DBF_ID_TRIGGER;
784         r->id2 = id2;
785         r->u.trigger.ref = (unsigned long)ref;
786         r->u.trigger.want = want;
787         r->u.trigger.need = need;
788         r->u.trigger.action = (unsigned long)action;
789         r->u.trigger.as = atomic_read(&adapter->status);
790         if (port) {
791                 r->u.trigger.ps = atomic_read(&port->status);
792                 r->u.trigger.wwpn = port->wwpn;
793         }
794         if (unit) {
795                 r->u.trigger.us = atomic_read(&unit->status);
796                 r->u.trigger.fcp_lun = unit->fcp_lun;
797         }
798         debug_event(adapter->rec_dbf, action ? 1 : 4, r, sizeof(*r));
799         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
800 }
801
802 /**
803  * zfcp_rec_dbf_event_action - trace event showing progress of recovery action
804  * @id2: identifier
805  * @erp_action: error recovery action struct pointer
806  */
807 void zfcp_rec_dbf_event_action(u8 id2, struct zfcp_erp_action *erp_action)
808 {
809         struct zfcp_adapter *adapter = erp_action->adapter;
810         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
811         unsigned long flags;
812
813         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
814         memset(r, 0, sizeof(*r));
815         r->id = ZFCP_REC_DBF_ID_ACTION;
816         r->id2 = id2;
817         r->u.action.action = (unsigned long)erp_action;
818         r->u.action.status = erp_action->status;
819         r->u.action.step = erp_action->step;
820         r->u.action.fsf_req = (unsigned long)erp_action->fsf_req;
821         debug_event(adapter->rec_dbf, 5, r, sizeof(*r));
822         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
823 }
824
825 /**
826  * zfcp_san_dbf_event_ct_request - trace event for issued CT request
827  * @fsf_req: request containing issued CT data
828  */
829 void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
830 {
831         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
832         struct zfcp_port *port = ct->port;
833         struct zfcp_adapter *adapter = port->adapter;
834         struct ct_hdr *hdr = zfcp_sg_to_address(ct->req);
835         struct zfcp_san_dbf_record *r = &adapter->san_dbf_buf;
836         struct zfcp_san_dbf_record_ct_request *oct = &r->u.ct_req;
837         unsigned long flags;
838
839         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
840         memset(r, 0, sizeof(*r));
841         strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
842         r->fsf_reqid = (unsigned long)fsf_req;
843         r->fsf_seqno = fsf_req->seq_no;
844         r->s_id = fc_host_port_id(adapter->scsi_host);
845         r->d_id = port->d_id;
846         oct->cmd_req_code = hdr->cmd_rsp_code;
847         oct->revision = hdr->revision;
848         oct->gs_type = hdr->gs_type;
849         oct->gs_subtype = hdr->gs_subtype;
850         oct->options = hdr->options;
851         oct->max_res_size = hdr->max_res_size;
852         oct->len = min((int)ct->req->length - (int)sizeof(struct ct_hdr),
853                        ZFCP_DBF_CT_PAYLOAD);
854         memcpy(oct->payload, (void *)hdr + sizeof(struct ct_hdr), oct->len);
855         debug_event(adapter->san_dbf, 3, r, sizeof(*r));
856         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
857 }
858
859 /**
860  * zfcp_san_dbf_event_ct_response - trace event for completion of CT request
861  * @fsf_req: request containing CT response
862  */
863 void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
864 {
865         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
866         struct zfcp_port *port = ct->port;
867         struct zfcp_adapter *adapter = port->adapter;
868         struct ct_hdr *hdr = zfcp_sg_to_address(ct->resp);
869         struct zfcp_san_dbf_record *r = &adapter->san_dbf_buf;
870         struct zfcp_san_dbf_record_ct_response *rct = &r->u.ct_resp;
871         unsigned long flags;
872
873         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
874         memset(r, 0, sizeof(*r));
875         strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
876         r->fsf_reqid = (unsigned long)fsf_req;
877         r->fsf_seqno = fsf_req->seq_no;
878         r->s_id = port->d_id;
879         r->d_id = fc_host_port_id(adapter->scsi_host);
880         rct->cmd_rsp_code = hdr->cmd_rsp_code;
881         rct->revision = hdr->revision;
882         rct->reason_code = hdr->reason_code;
883         rct->expl = hdr->reason_code_expl;
884         rct->vendor_unique = hdr->vendor_unique;
885         rct->len = min((int)ct->resp->length - (int)sizeof(struct ct_hdr),
886                        ZFCP_DBF_CT_PAYLOAD);
887         memcpy(rct->payload, (void *)hdr + sizeof(struct ct_hdr), rct->len);
888         debug_event(adapter->san_dbf, 3, r, sizeof(*r));
889         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
890 }
891
892 static void zfcp_san_dbf_event_els(const char *tag, int level,
893                                    struct zfcp_fsf_req *fsf_req, u32 s_id,
894                                    u32 d_id, u8 ls_code, void *buffer,
895                                    int buflen)
896 {
897         struct zfcp_adapter *adapter = fsf_req->adapter;
898         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
899         unsigned long flags;
900
901         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
902         memset(rec, 0, sizeof(*rec));
903         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
904         rec->fsf_reqid = (unsigned long)fsf_req;
905         rec->fsf_seqno = fsf_req->seq_no;
906         rec->s_id = s_id;
907         rec->d_id = d_id;
908         rec->u.els.ls_code = ls_code;
909         debug_event(adapter->san_dbf, level, rec, sizeof(*rec));
910         zfcp_dbf_hexdump(adapter->san_dbf, rec, sizeof(*rec), level,
911                          buffer, min(buflen, ZFCP_DBF_ELS_MAX_PAYLOAD));
912         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
913 }
914
915 /**
916  * zfcp_san_dbf_event_els_request - trace event for issued ELS
917  * @fsf_req: request containing issued ELS
918  */
919 void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
920 {
921         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
922
923         zfcp_san_dbf_event_els("oels", 2, fsf_req,
924                                fc_host_port_id(els->adapter->scsi_host),
925                                els->d_id, *(u8 *) zfcp_sg_to_address(els->req),
926                                zfcp_sg_to_address(els->req), els->req->length);
927 }
928
929 /**
930  * zfcp_san_dbf_event_els_response - trace event for completed ELS
931  * @fsf_req: request containing ELS response
932  */
933 void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
934 {
935         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
936
937         zfcp_san_dbf_event_els("rels", 2, fsf_req, els->d_id,
938                                fc_host_port_id(els->adapter->scsi_host),
939                                *(u8 *)zfcp_sg_to_address(els->req),
940                                zfcp_sg_to_address(els->resp),
941                                els->resp->length);
942 }
943
944 /**
945  * zfcp_san_dbf_event_incoming_els - trace event for incomig ELS
946  * @fsf_req: request containing unsolicited status buffer with incoming ELS
947  */
948 void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
949 {
950         struct zfcp_adapter *adapter = fsf_req->adapter;
951         struct fsf_status_read_buffer *buf =
952                         (struct fsf_status_read_buffer *)fsf_req->data;
953         int length = (int)buf->length -
954                      (int)((void *)&buf->payload - (void *)buf);
955
956         zfcp_san_dbf_event_els("iels", 1, fsf_req, buf->d_id,
957                                fc_host_port_id(adapter->scsi_host),
958                                buf->payload.data[0], (void *)buf->payload.data,
959                                length);
960 }
961
962 static int zfcp_san_dbf_view_format(debug_info_t *id, struct debug_view *view,
963                                     char *out_buf, const char *in_buf)
964 {
965         struct zfcp_san_dbf_record *r = (struct zfcp_san_dbf_record *)in_buf;
966         char *buffer = NULL;
967         int buflen = 0, total = 0;
968         char *p = out_buf;
969
970         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
971                 return 0;
972
973         zfcp_dbf_tag(&p, "tag", r->tag);
974         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
975         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
976         zfcp_dbf_out(&p, "s_id", "0x%06x", r->s_id);
977         zfcp_dbf_out(&p, "d_id", "0x%06x", r->d_id);
978
979         if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
980                 struct zfcp_san_dbf_record_ct_request *ct = &r->u.ct_req;
981                 zfcp_dbf_out(&p, "cmd_req_code", "0x%04x", ct->cmd_req_code);
982                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
983                 zfcp_dbf_out(&p, "gs_type", "0x%02x", ct->gs_type);
984                 zfcp_dbf_out(&p, "gs_subtype", "0x%02x", ct->gs_subtype);
985                 zfcp_dbf_out(&p, "options", "0x%02x", ct->options);
986                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
987                 total = ct->len;
988                 buffer = ct->payload;
989                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
990         } else if (strncmp(r->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
991                 struct zfcp_san_dbf_record_ct_response *ct = &r->u.ct_resp;
992                 zfcp_dbf_out(&p, "cmd_rsp_code", "0x%04x", ct->cmd_rsp_code);
993                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
994                 zfcp_dbf_out(&p, "reason_code", "0x%02x", ct->reason_code);
995                 zfcp_dbf_out(&p, "reason_code_expl", "0x%02x", ct->expl);
996                 zfcp_dbf_out(&p, "vendor_unique", "0x%02x", ct->vendor_unique);
997                 total = ct->len;
998                 buffer = ct->payload;
999                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
1000         } else if (strncmp(r->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
1001                    strncmp(r->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
1002                    strncmp(r->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
1003                 struct zfcp_san_dbf_record_els *els = &r->u.els;
1004                 zfcp_dbf_out(&p, "ls_code", "0x%02x", els->ls_code);
1005                 total = els->len;
1006                 buffer = els->payload;
1007                 buflen = min(total, ZFCP_DBF_ELS_PAYLOAD);
1008         }
1009
1010         zfcp_dbf_outd(&p, "payload", buffer, buflen, 0, total);
1011         if (buflen == total)
1012                 p += sprintf(p, "\n");
1013
1014         return p - out_buf;
1015 }
1016
1017 static struct debug_view zfcp_san_dbf_view = {
1018         "structured",
1019         NULL,
1020         &zfcp_dbf_view_header,
1021         &zfcp_san_dbf_view_format,
1022         NULL,
1023         NULL
1024 };
1025
1026 static void zfcp_scsi_dbf_event(const char *tag, const char *tag2, int level,
1027                                 struct zfcp_adapter *adapter,
1028                                 struct scsi_cmnd *scsi_cmnd,
1029                                 struct zfcp_fsf_req *fsf_req,
1030                                 unsigned long old_req_id)
1031 {
1032         struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
1033         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
1034         unsigned long flags;
1035         struct fcp_rsp_iu *fcp_rsp;
1036         char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
1037         int offset = 0, buflen = 0;
1038
1039         spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
1040         do {
1041                 memset(rec, 0, sizeof(*rec));
1042                 if (offset == 0) {
1043                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
1044                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
1045                         if (scsi_cmnd != NULL) {
1046                                 if (scsi_cmnd->device) {
1047                                         rec->scsi_id = scsi_cmnd->device->id;
1048                                         rec->scsi_lun = scsi_cmnd->device->lun;
1049                                 }
1050                                 rec->scsi_result = scsi_cmnd->result;
1051                                 rec->scsi_cmnd = (unsigned long)scsi_cmnd;
1052                                 rec->scsi_serial = scsi_cmnd->serial_number;
1053                                 memcpy(rec->scsi_opcode, scsi_cmnd->cmnd,
1054                                         min((int)scsi_cmnd->cmd_len,
1055                                                 ZFCP_DBF_SCSI_OPCODE));
1056                                 rec->scsi_retries = scsi_cmnd->retries;
1057                                 rec->scsi_allowed = scsi_cmnd->allowed;
1058                         }
1059                         if (fsf_req != NULL) {
1060                                 fcp_rsp = (struct fcp_rsp_iu *)
1061                                     &(fsf_req->qtcb->bottom.io.fcp_rsp);
1062                                 fcp_rsp_info = (unsigned char *) &fcp_rsp[1];
1063                                 fcp_sns_info =
1064                                     zfcp_get_fcp_sns_info_ptr(fcp_rsp);
1065
1066                                 rec->rsp_validity = fcp_rsp->validity.value;
1067                                 rec->rsp_scsi_status = fcp_rsp->scsi_status;
1068                                 rec->rsp_resid = fcp_rsp->fcp_resid;
1069                                 if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
1070                                         rec->rsp_code = *(fcp_rsp_info + 3);
1071                                 if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
1072                                         buflen = min((int)fcp_rsp->fcp_sns_len,
1073                                                      ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
1074                                         rec->sns_info_len = buflen;
1075                                         memcpy(rec->sns_info, fcp_sns_info,
1076                                                min(buflen,
1077                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
1078                                         offset += min(buflen,
1079                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
1080                                 }
1081
1082                                 rec->fsf_reqid = (unsigned long)fsf_req;
1083                                 rec->fsf_seqno = fsf_req->seq_no;
1084                                 rec->fsf_issued = fsf_req->issued;
1085                         }
1086                         rec->old_fsf_reqid = old_req_id;
1087                 } else {
1088                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
1089                         dump->total_size = buflen;
1090                         dump->offset = offset;
1091                         dump->size = min(buflen - offset,
1092                                          (int)sizeof(struct
1093                                                      zfcp_scsi_dbf_record) -
1094                                          (int)sizeof(struct zfcp_dbf_dump));
1095                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
1096                         offset += dump->size;
1097                 }
1098                 debug_event(adapter->scsi_dbf, level, rec, sizeof(*rec));
1099         } while (offset < buflen);
1100         spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
1101 }
1102
1103 /**
1104  * zfcp_scsi_dbf_event_result - trace event for SCSI command completion
1105  * @tag: tag indicating success or failure of SCSI command
1106  * @level: trace level applicable for this event
1107  * @adapter: adapter that has been used to issue the SCSI command
1108  * @scsi_cmnd: SCSI command pointer
1109  * @fsf_req: request used to issue SCSI command (might be NULL)
1110  */
1111 void zfcp_scsi_dbf_event_result(const char *tag, int level,
1112                                 struct zfcp_adapter *adapter,
1113                                 struct scsi_cmnd *scsi_cmnd,
1114                                 struct zfcp_fsf_req *fsf_req)
1115 {
1116         zfcp_scsi_dbf_event("rslt", tag, level, adapter, scsi_cmnd, fsf_req, 0);
1117 }
1118
1119 /**
1120  * zfcp_scsi_dbf_event_abort - trace event for SCSI command abort
1121  * @tag: tag indicating success or failure of abort operation
1122  * @adapter: adapter thas has been used to issue SCSI command to be aborted
1123  * @scsi_cmnd: SCSI command to be aborted
1124  * @new_fsf_req: request containing abort (might be NULL)
1125  * @old_req_id: identifier of request containg SCSI command to be aborted
1126  */
1127 void zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
1128                                struct scsi_cmnd *scsi_cmnd,
1129                                struct zfcp_fsf_req *new_fsf_req,
1130                                unsigned long old_req_id)
1131 {
1132         zfcp_scsi_dbf_event("abrt", tag, 1, adapter, scsi_cmnd, new_fsf_req,
1133                             old_req_id);
1134 }
1135
1136 /**
1137  * zfcp_scsi_dbf_event_devreset - trace event for Logical Unit or Target Reset
1138  * @tag: tag indicating success or failure of reset operation
1139  * @flag: indicates type of reset (Target Reset, Logical Unit Reset)
1140  * @unit: unit that needs reset
1141  * @scsi_cmnd: SCSI command which caused this error recovery
1142  */
1143 void zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag,
1144                                   struct zfcp_unit *unit,
1145                                   struct scsi_cmnd *scsi_cmnd)
1146 {
1147         zfcp_scsi_dbf_event(flag == FCP_TARGET_RESET ? "trst" : "lrst", tag, 1,
1148                             unit->port->adapter, scsi_cmnd, NULL, 0);
1149 }
1150
1151 static int zfcp_scsi_dbf_view_format(debug_info_t *id, struct debug_view *view,
1152                                      char *out_buf, const char *in_buf)
1153 {
1154         struct zfcp_scsi_dbf_record *r = (struct zfcp_scsi_dbf_record *)in_buf;
1155         struct timespec t;
1156         char *p = out_buf;
1157
1158         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
1159                 return 0;
1160
1161         zfcp_dbf_tag(&p, "tag", r->tag);
1162         zfcp_dbf_tag(&p, "tag2", r->tag2);
1163         zfcp_dbf_out(&p, "scsi_id", "0x%08x", r->scsi_id);
1164         zfcp_dbf_out(&p, "scsi_lun", "0x%08x", r->scsi_lun);
1165         zfcp_dbf_out(&p, "scsi_result", "0x%08x", r->scsi_result);
1166         zfcp_dbf_out(&p, "scsi_cmnd", "0x%0Lx", r->scsi_cmnd);
1167         zfcp_dbf_out(&p, "scsi_serial", "0x%016Lx", r->scsi_serial);
1168         zfcp_dbf_outd(&p, "scsi_opcode", r->scsi_opcode, ZFCP_DBF_SCSI_OPCODE,
1169                       0, ZFCP_DBF_SCSI_OPCODE);
1170         zfcp_dbf_out(&p, "scsi_retries", "0x%02x", r->scsi_retries);
1171         zfcp_dbf_out(&p, "scsi_allowed", "0x%02x", r->scsi_allowed);
1172         if (strncmp(r->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0)
1173                 zfcp_dbf_out(&p, "old_fsf_reqid", "0x%0Lx", r->old_fsf_reqid);
1174         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
1175         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
1176         zfcp_dbf_timestamp(r->fsf_issued, &t);
1177         zfcp_dbf_out(&p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
1178
1179         if (strncmp(r->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
1180                 zfcp_dbf_out(&p, "fcp_rsp_validity", "0x%02x", r->rsp_validity);
1181                 zfcp_dbf_out(&p, "fcp_rsp_scsi_status", "0x%02x",
1182                              r->rsp_scsi_status);
1183                 zfcp_dbf_out(&p, "fcp_rsp_resid", "0x%08x", r->rsp_resid);
1184                 zfcp_dbf_out(&p, "fcp_rsp_code", "0x%08x", r->rsp_code);
1185                 zfcp_dbf_out(&p, "fcp_sns_info_len", "0x%08x", r->sns_info_len);
1186                 zfcp_dbf_outd(&p, "fcp_sns_info", r->sns_info,
1187                               min((int)r->sns_info_len,
1188                               ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
1189                               r->sns_info_len);
1190         }
1191         p += sprintf(p, "\n");
1192         return p - out_buf;
1193 }
1194
1195 static struct debug_view zfcp_scsi_dbf_view = {
1196         "structured",
1197         NULL,
1198         &zfcp_dbf_view_header,
1199         &zfcp_scsi_dbf_view_format,
1200         NULL,
1201         NULL
1202 };
1203
1204 /**
1205  * zfcp_adapter_debug_register - registers debug feature for an adapter
1206  * @adapter: pointer to adapter for which debug features should be registered
1207  * return: -ENOMEM on error, 0 otherwise
1208  */
1209 int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
1210 {
1211         char dbf_name[DEBUG_MAX_NAME_LEN];
1212
1213         /* debug feature area which records recovery activity */
1214         sprintf(dbf_name, "zfcp_%s_rec", zfcp_get_busid_by_adapter(adapter));
1215         adapter->rec_dbf = debug_register(dbf_name, dbfsize, 1,
1216                                           sizeof(struct zfcp_rec_dbf_record));
1217         if (!adapter->rec_dbf)
1218                 goto failed;
1219         debug_register_view(adapter->rec_dbf, &debug_hex_ascii_view);
1220         debug_register_view(adapter->rec_dbf, &zfcp_rec_dbf_view);
1221         debug_set_level(adapter->rec_dbf, 3);
1222
1223         /* debug feature area which records HBA (FSF and QDIO) conditions */
1224         sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter));
1225         adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
1226                                           sizeof(struct zfcp_hba_dbf_record));
1227         if (!adapter->hba_dbf)
1228                 goto failed;
1229         debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
1230         debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
1231         debug_set_level(adapter->hba_dbf, 3);
1232
1233         /* debug feature area which records SAN command failures and recovery */
1234         sprintf(dbf_name, "zfcp_%s_san", zfcp_get_busid_by_adapter(adapter));
1235         adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
1236                                           sizeof(struct zfcp_san_dbf_record));
1237         if (!adapter->san_dbf)
1238                 goto failed;
1239         debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
1240         debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
1241         debug_set_level(adapter->san_dbf, 6);
1242
1243         /* debug feature area which records SCSI command failures and recovery */
1244         sprintf(dbf_name, "zfcp_%s_scsi", zfcp_get_busid_by_adapter(adapter));
1245         adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
1246                                            sizeof(struct zfcp_scsi_dbf_record));
1247         if (!adapter->scsi_dbf)
1248                 goto failed;
1249         debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
1250         debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
1251         debug_set_level(adapter->scsi_dbf, 3);
1252
1253         return 0;
1254
1255  failed:
1256         zfcp_adapter_debug_unregister(adapter);
1257
1258         return -ENOMEM;
1259 }
1260
1261 /**
1262  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
1263  * @adapter: pointer to adapter for which debug features should be unregistered
1264  */
1265 void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
1266 {
1267         debug_unregister(adapter->scsi_dbf);
1268         debug_unregister(adapter->san_dbf);
1269         debug_unregister(adapter->hba_dbf);
1270         debug_unregister(adapter->rec_dbf);
1271         adapter->scsi_dbf = NULL;
1272         adapter->san_dbf = NULL;
1273         adapter->hba_dbf = NULL;
1274         adapter->rec_dbf = NULL;
1275 }