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[NET_SCHED]: Fix endless loops caused by inaccurate qlen counters (part 1)
[hh.org.git] / drivers / s390 / scsi / zfcp_dbf.c
blob0aa3b1ac76af4e66c8fd249c0c36624e8fa4fea2
1 /*
2 * This file is part of the zfcp device driver for
3 * FCP adapters for IBM System z9 and zSeries.
4 *
5 * (C) Copyright IBM Corp. 2002, 2006
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22 #include <asm/debug.h>
23 #include <linux/ctype.h>
24 #include "zfcp_ext.h"
25
26 static u32 dbfsize = 4;
27
28 module_param(dbfsize, uint, 0400);
29 MODULE_PARM_DESC(dbfsize,
30 "number of pages for each debug feature area (default 4)");
31
32 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_OTHER
33
34 static inline int
35 zfcp_dbf_stck(char *out_buf, const char *label, unsigned long long stck)
36 {
37 unsigned long long sec;
38 struct timespec xtime;
39 int len = 0;
40
41 stck -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
42 sec = stck >> 12;
43 do_div(sec, 1000000);
44 xtime.tv_sec = sec;
45 stck -= (sec * 1000000) << 12;
46 xtime.tv_nsec = ((stck * 1000) >> 12);
47 len += sprintf(out_buf + len, "%-24s%011lu:%06lu\n",
48 label, xtime.tv_sec, xtime.tv_nsec);
49
50 return len;
51 }
52
53 static int zfcp_dbf_tag(char *out_buf, const char *label, const char *tag)
54 {
55 int len = 0, i;
56
57 len += sprintf(out_buf + len, "%-24s", label);
58 for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
59 len += sprintf(out_buf + len, "%c", tag[i]);
60 len += sprintf(out_buf + len, "\n");
61
62 return len;
63 }
64
65 static int
66 zfcp_dbf_view(char *out_buf, const char *label, const char *format, ...)
67 {
68 va_list arg;
69 int len = 0;
70
71 len += sprintf(out_buf + len, "%-24s", label);
72 va_start(arg, format);
73 len += vsprintf(out_buf + len, format, arg);
74 va_end(arg);
75 len += sprintf(out_buf + len, "\n");
76
77 return len;
78 }
79
80 static int
81 zfcp_dbf_view_dump(char *out_buf, const char *label,
82 char *buffer, int buflen, int offset, int total_size)
83 {
84 int len = 0;
85
86 if (offset == 0)
87 len += sprintf(out_buf + len, "%-24s ", label);
88
89 while (buflen--) {
90 if (offset > 0) {
91 if ((offset % 32) == 0)
92 len += sprintf(out_buf + len, "\n%-24c ", ' ');
93 else if ((offset % 4) == 0)
94 len += sprintf(out_buf + len, " ");
95 }
96 len += sprintf(out_buf + len, "%02x", *buffer++);
97 if (++offset == total_size) {
98 len += sprintf(out_buf + len, "\n");
99 break;
100 }
101 }
102
103 if (total_size == 0)
104 len += sprintf(out_buf + len, "\n");
105
106 return len;
107 }
108
109 static inline int
110 zfcp_dbf_view_header(debug_info_t * id, struct debug_view *view, int area,
111 debug_entry_t * entry, char *out_buf)
112 {
113 struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
114 int len = 0;
115
116 if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
117 len += zfcp_dbf_stck(out_buf + len, "timestamp",
118 entry->id.stck);
119 len += zfcp_dbf_view(out_buf + len, "cpu", "%02i",
120 entry->id.fields.cpuid);
121 } else {
122 len += zfcp_dbf_view_dump(out_buf + len, NULL,
123 dump->data,
124 dump->size,
125 dump->offset, dump->total_size);
126 if ((dump->offset + dump->size) == dump->total_size)
127 len += sprintf(out_buf + len, "\n");
128 }
129
130 return len;
131 }
132
133 inline void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
134 {
135 struct zfcp_adapter *adapter = fsf_req->adapter;
136 struct fsf_qtcb *qtcb = fsf_req->qtcb;
137 union fsf_prot_status_qual *prot_status_qual =
138 &qtcb->prefix.prot_status_qual;
139 union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
140 struct scsi_cmnd *scsi_cmnd;
141 struct zfcp_port *port;
142 struct zfcp_unit *unit;
143 struct zfcp_send_els *send_els;
144 struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
145 struct zfcp_hba_dbf_record_response *response = &rec->type.response;
146 int level;
147 unsigned long flags;
148
149 spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
150 memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
151 strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
152
153 if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
154 (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
155 strncpy(rec->tag2, "perr", ZFCP_DBF_TAG_SIZE);
156 level = 1;
157 } else if (qtcb->header.fsf_status != FSF_GOOD) {
158 strncpy(rec->tag2, "ferr", ZFCP_DBF_TAG_SIZE);
159 level = 1;
160 } else if ((fsf_req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
161 (fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) {
162 strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE);
163 level = 4;
164 } else if ((prot_status_qual->doubleword[0] != 0) ||
165 (prot_status_qual->doubleword[1] != 0) ||
166 (fsf_status_qual->doubleword[0] != 0) ||
167 (fsf_status_qual->doubleword[1] != 0)) {
168 strncpy(rec->tag2, "qual", ZFCP_DBF_TAG_SIZE);
169 level = 3;
170 } else {
171 strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE);
172 level = 6;
173 }
174
175 response->fsf_command = fsf_req->fsf_command;
176 response->fsf_reqid = (unsigned long)fsf_req;
177 response->fsf_seqno = fsf_req->seq_no;
178 response->fsf_issued = fsf_req->issued;
179 response->fsf_prot_status = qtcb->prefix.prot_status;
180 response->fsf_status = qtcb->header.fsf_status;
181 memcpy(response->fsf_prot_status_qual,
182 prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
183 memcpy(response->fsf_status_qual,
184 fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
185 response->fsf_req_status = fsf_req->status;
186 response->sbal_first = fsf_req->sbal_first;
187 response->sbal_curr = fsf_req->sbal_curr;
188 response->sbal_last = fsf_req->sbal_last;
189 response->pool = fsf_req->pool != NULL;
190 response->erp_action = (unsigned long)fsf_req->erp_action;
191
192 switch (fsf_req->fsf_command) {
193 case FSF_QTCB_FCP_CMND:
194 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
195 break;
196 scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
197 if (scsi_cmnd != NULL) {
198 response->data.send_fcp.scsi_cmnd
199 = (unsigned long)scsi_cmnd;
200 response->data.send_fcp.scsi_serial
201 = scsi_cmnd->serial_number;
202 }
203 break;
204
205 case FSF_QTCB_OPEN_PORT_WITH_DID:
206 case FSF_QTCB_CLOSE_PORT:
207 case FSF_QTCB_CLOSE_PHYSICAL_PORT:
208 port = (struct zfcp_port *)fsf_req->data;
209 response->data.port.wwpn = port->wwpn;
210 response->data.port.d_id = port->d_id;
211 response->data.port.port_handle = qtcb->header.port_handle;
212 break;
213
214 case FSF_QTCB_OPEN_LUN:
215 case FSF_QTCB_CLOSE_LUN:
216 unit = (struct zfcp_unit *)fsf_req->data;
217 port = unit->port;
218 response->data.unit.wwpn = port->wwpn;
219 response->data.unit.fcp_lun = unit->fcp_lun;
220 response->data.unit.port_handle = qtcb->header.port_handle;
221 response->data.unit.lun_handle = qtcb->header.lun_handle;
222 break;
223
224 case FSF_QTCB_SEND_ELS:
225 send_els = (struct zfcp_send_els *)fsf_req->data;
226 response->data.send_els.d_id = qtcb->bottom.support.d_id;
227 response->data.send_els.ls_code = send_els->ls_code >> 24;
228 break;
229
230 case FSF_QTCB_ABORT_FCP_CMND:
231 case FSF_QTCB_SEND_GENERIC:
232 case FSF_QTCB_EXCHANGE_CONFIG_DATA:
233 case FSF_QTCB_EXCHANGE_PORT_DATA:
234 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
235 case FSF_QTCB_UPLOAD_CONTROL_FILE:
236 break;
237 }
238
239 debug_event(adapter->hba_dbf, level,
240 rec, sizeof(struct zfcp_hba_dbf_record));
241 spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
242 }
243
244 inline void
245 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(struct zfcp_hba_dbf_record));
253 strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
254 strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
255
256 rec->type.status.failed = adapter->status_read_failed;
257 if (status_buffer != NULL) {
258 rec->type.status.status_type = status_buffer->status_type;
259 rec->type.status.status_subtype = status_buffer->status_subtype;
260 memcpy(&rec->type.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->type.status.payload_size =
267 ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
268 break;
269
270 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
271 rec->type.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->type.status.payload_size =
280 sizeof(struct fsf_link_down_info);
281 }
282 break;
283
284 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
285 rec->type.status.payload_size =
286 ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
287 break;
288 }
289 memcpy(&rec->type.status.payload,
290 &status_buffer->payload, rec->type.status.payload_size);
291 }
292
293 debug_event(adapter->hba_dbf, 2,
294 rec, sizeof(struct zfcp_hba_dbf_record));
295 spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
296 }
297
298 inline void
299 zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter, unsigned int status,
300 unsigned int qdio_error, unsigned int siga_error,
301 int sbal_index, int sbal_count)
302 {
303 struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
304 unsigned long flags;
305
306 spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
307 memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
308 strncpy(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE);
309 rec->type.qdio.status = status;
310 rec->type.qdio.qdio_error = qdio_error;
311 rec->type.qdio.siga_error = siga_error;
312 rec->type.qdio.sbal_index = sbal_index;
313 rec->type.qdio.sbal_count = sbal_count;
314 debug_event(adapter->hba_dbf, 0,
315 rec, sizeof(struct zfcp_hba_dbf_record));
316 spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
317 }
318
319 static inline int
320 zfcp_hba_dbf_view_response(char *out_buf,
321 struct zfcp_hba_dbf_record_response *rec)
322 {
323 int len = 0;
324
325 len += zfcp_dbf_view(out_buf + len, "fsf_command", "0x%08x",
326 rec->fsf_command);
327 len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
328 rec->fsf_reqid);
329 len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
330 rec->fsf_seqno);
331 len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
332 len += zfcp_dbf_view(out_buf + len, "fsf_prot_status", "0x%08x",
333 rec->fsf_prot_status);
334 len += zfcp_dbf_view(out_buf + len, "fsf_status", "0x%08x",
335 rec->fsf_status);
336 len += zfcp_dbf_view_dump(out_buf + len, "fsf_prot_status_qual",
337 rec->fsf_prot_status_qual,
338 FSF_PROT_STATUS_QUAL_SIZE,
339 0, FSF_PROT_STATUS_QUAL_SIZE);
340 len += zfcp_dbf_view_dump(out_buf + len, "fsf_status_qual",
341 rec->fsf_status_qual,
342 FSF_STATUS_QUALIFIER_SIZE,
343 0, FSF_STATUS_QUALIFIER_SIZE);
344 len += zfcp_dbf_view(out_buf + len, "fsf_req_status", "0x%08x",
345 rec->fsf_req_status);
346 len += zfcp_dbf_view(out_buf + len, "sbal_first", "0x%02x",
347 rec->sbal_first);
348 len += zfcp_dbf_view(out_buf + len, "sbal_curr", "0x%02x",
349 rec->sbal_curr);
350 len += zfcp_dbf_view(out_buf + len, "sbal_last", "0x%02x",
351 rec->sbal_last);
352 len += zfcp_dbf_view(out_buf + len, "pool", "0x%02x", rec->pool);
353
354 switch (rec->fsf_command) {
355 case FSF_QTCB_FCP_CMND:
356 if (rec->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
357 break;
358 len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
359 rec->data.send_fcp.scsi_cmnd);
360 len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
361 rec->data.send_fcp.scsi_serial);
362 break;
363
364 case FSF_QTCB_OPEN_PORT_WITH_DID:
365 case FSF_QTCB_CLOSE_PORT:
366 case FSF_QTCB_CLOSE_PHYSICAL_PORT:
367 len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
368 rec->data.port.wwpn);
369 len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
370 rec->data.port.d_id);
371 len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
372 rec->data.port.port_handle);
373 break;
374
375 case FSF_QTCB_OPEN_LUN:
376 case FSF_QTCB_CLOSE_LUN:
377 len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
378 rec->data.unit.wwpn);
379 len += zfcp_dbf_view(out_buf + len, "fcp_lun", "0x%016Lx",
380 rec->data.unit.fcp_lun);
381 len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
382 rec->data.unit.port_handle);
383 len += zfcp_dbf_view(out_buf + len, "lun_handle", "0x%08x",
384 rec->data.unit.lun_handle);
385 break;
386
387 case FSF_QTCB_SEND_ELS:
388 len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
389 rec->data.send_els.d_id);
390 len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
391 rec->data.send_els.ls_code);
392 break;
393
394 case FSF_QTCB_ABORT_FCP_CMND:
395 case FSF_QTCB_SEND_GENERIC:
396 case FSF_QTCB_EXCHANGE_CONFIG_DATA:
397 case FSF_QTCB_EXCHANGE_PORT_DATA:
398 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
399 case FSF_QTCB_UPLOAD_CONTROL_FILE:
400 break;
401 }
402
403 return len;
404 }
405
406 static inline int
407 zfcp_hba_dbf_view_status(char *out_buf, struct zfcp_hba_dbf_record_status *rec)
408 {
409 int len = 0;
410
411 len += zfcp_dbf_view(out_buf + len, "failed", "0x%02x", rec->failed);
412 len += zfcp_dbf_view(out_buf + len, "status_type", "0x%08x",
413 rec->status_type);
414 len += zfcp_dbf_view(out_buf + len, "status_subtype", "0x%08x",
415 rec->status_subtype);
416 len += zfcp_dbf_view_dump(out_buf + len, "queue_designator",
417 (char *)&rec->queue_designator,
418 sizeof(struct fsf_queue_designator),
419 0, sizeof(struct fsf_queue_designator));
420 len += zfcp_dbf_view_dump(out_buf + len, "payload",
421 (char *)&rec->payload,
422 rec->payload_size, 0, rec->payload_size);
423
424 return len;
425 }
426
427 static inline int
428 zfcp_hba_dbf_view_qdio(char *out_buf, struct zfcp_hba_dbf_record_qdio *rec)
429 {
430 int len = 0;
431
432 len += zfcp_dbf_view(out_buf + len, "status", "0x%08x", rec->status);
433 len += zfcp_dbf_view(out_buf + len, "qdio_error", "0x%08x",
434 rec->qdio_error);
435 len += zfcp_dbf_view(out_buf + len, "siga_error", "0x%08x",
436 rec->siga_error);
437 len += zfcp_dbf_view(out_buf + len, "sbal_index", "0x%02x",
438 rec->sbal_index);
439 len += zfcp_dbf_view(out_buf + len, "sbal_count", "0x%02x",
440 rec->sbal_count);
441
442 return len;
443 }
444
445 static int
446 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 *rec = (struct zfcp_hba_dbf_record *)in_buf;
450 int len = 0;
451
452 if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
453 return 0;
454
455 len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
456 if (isalpha(rec->tag2[0]))
457 len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
458 if (strncmp(rec->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
459 len += zfcp_hba_dbf_view_response(out_buf + len,
460 &rec->type.response);
461 else if (strncmp(rec->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
462 len += zfcp_hba_dbf_view_status(out_buf + len,
463 &rec->type.status);
464 else if (strncmp(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
465 len += zfcp_hba_dbf_view_qdio(out_buf + len, &rec->type.qdio);
466
467 len += sprintf(out_buf + len, "\n");
468
469 return len;
470 }
471
472 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 inline void
482 _zfcp_san_dbf_event_common_ct(const char *tag, struct zfcp_fsf_req *fsf_req,
483 u32 s_id, u32 d_id, void *buffer, int buflen)
484 {
485 struct zfcp_send_ct *send_ct = (struct zfcp_send_ct *)fsf_req->data;
486 struct zfcp_port *port = send_ct->port;
487 struct zfcp_adapter *adapter = port->adapter;
488 struct ct_hdr *header = (struct ct_hdr *)buffer;
489 struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
490 struct zfcp_san_dbf_record_ct *ct = &rec->type.ct;
491 unsigned long flags;
492
493 spin_lock_irqsave(&adapter->san_dbf_lock, flags);
494 memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
495 strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
496 rec->fsf_reqid = (unsigned long)fsf_req;
497 rec->fsf_seqno = fsf_req->seq_no;
498 rec->s_id = s_id;
499 rec->d_id = d_id;
500 if (strncmp(tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
501 ct->type.request.cmd_req_code = header->cmd_rsp_code;
502 ct->type.request.revision = header->revision;
503 ct->type.request.gs_type = header->gs_type;
504 ct->type.request.gs_subtype = header->gs_subtype;
505 ct->type.request.options = header->options;
506 ct->type.request.max_res_size = header->max_res_size;
507 } else if (strncmp(tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
508 ct->type.response.cmd_rsp_code = header->cmd_rsp_code;
509 ct->type.response.revision = header->revision;
510 ct->type.response.reason_code = header->reason_code;
511 ct->type.response.reason_code_expl = header->reason_code_expl;
512 ct->type.response.vendor_unique = header->vendor_unique;
513 }
514 ct->payload_size =
515 min(buflen - (int)sizeof(struct ct_hdr), ZFCP_DBF_CT_PAYLOAD);
516 memcpy(ct->payload, buffer + sizeof(struct ct_hdr), ct->payload_size);
517 debug_event(adapter->san_dbf, 3,
518 rec, sizeof(struct zfcp_san_dbf_record));
519 spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
520 }
521
522 inline void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
523 {
524 struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
525 struct zfcp_port *port = ct->port;
526 struct zfcp_adapter *adapter = port->adapter;
527
528 _zfcp_san_dbf_event_common_ct("octc", fsf_req,
529 fc_host_port_id(adapter->scsi_host),
530 port->d_id, zfcp_sg_to_address(ct->req),
531 ct->req->length);
532 }
533
534 inline void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
535 {
536 struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
537 struct zfcp_port *port = ct->port;
538 struct zfcp_adapter *adapter = port->adapter;
539
540 _zfcp_san_dbf_event_common_ct("rctc", fsf_req, port->d_id,
541 fc_host_port_id(adapter->scsi_host),
542 zfcp_sg_to_address(ct->resp),
543 ct->resp->length);
544 }
545
546 static inline void
547 _zfcp_san_dbf_event_common_els(const char *tag, int level,
548 struct zfcp_fsf_req *fsf_req, u32 s_id,
549 u32 d_id, u8 ls_code, void *buffer, int buflen)
550 {
551 struct zfcp_adapter *adapter = fsf_req->adapter;
552 struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
553 struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
554 unsigned long flags;
555 int offset = 0;
556
557 spin_lock_irqsave(&adapter->san_dbf_lock, flags);
558 do {
559 memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
560 if (offset == 0) {
561 strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
562 rec->fsf_reqid = (unsigned long)fsf_req;
563 rec->fsf_seqno = fsf_req->seq_no;
564 rec->s_id = s_id;
565 rec->d_id = d_id;
566 rec->type.els.ls_code = ls_code;
567 buflen = min(buflen, ZFCP_DBF_ELS_MAX_PAYLOAD);
568 rec->type.els.payload_size = buflen;
569 memcpy(rec->type.els.payload,
570 buffer, min(buflen, ZFCP_DBF_ELS_PAYLOAD));
571 offset += min(buflen, ZFCP_DBF_ELS_PAYLOAD);
572 } else {
573 strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
574 dump->total_size = buflen;
575 dump->offset = offset;
576 dump->size = min(buflen - offset,
577 (int)sizeof(struct zfcp_san_dbf_record)
578 - (int)sizeof(struct zfcp_dbf_dump));
579 memcpy(dump->data, buffer + offset, dump->size);
580 offset += dump->size;
581 }
582 debug_event(adapter->san_dbf, level,
583 rec, sizeof(struct zfcp_san_dbf_record));
584 } while (offset < buflen);
585 spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
586 }
587
588 inline void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
589 {
590 struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
591
592 _zfcp_san_dbf_event_common_els("oels", 2, fsf_req,
593 fc_host_port_id(els->adapter->scsi_host),
594 els->d_id,
595 *(u8 *) zfcp_sg_to_address(els->req),
596 zfcp_sg_to_address(els->req),
597 els->req->length);
598 }
599
600 inline void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
601 {
602 struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
603
604 _zfcp_san_dbf_event_common_els("rels", 2, fsf_req, els->d_id,
605 fc_host_port_id(els->adapter->scsi_host),
606 *(u8 *) zfcp_sg_to_address(els->req),
607 zfcp_sg_to_address(els->resp),
608 els->resp->length);
609 }
610
611 inline void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
612 {
613 struct zfcp_adapter *adapter = fsf_req->adapter;
614 struct fsf_status_read_buffer *status_buffer =
615 (struct fsf_status_read_buffer *)fsf_req->data;
616 int length = (int)status_buffer->length -
617 (int)((void *)&status_buffer->payload - (void *)status_buffer);
618
619 _zfcp_san_dbf_event_common_els("iels", 1, fsf_req, status_buffer->d_id,
620 fc_host_port_id(adapter->scsi_host),
621 *(u8 *) status_buffer->payload,
622 (void *)status_buffer->payload, length);
623 }
624
625 static int
626 zfcp_san_dbf_view_format(debug_info_t * id, struct debug_view *view,
627 char *out_buf, const char *in_buf)
628 {
629 struct zfcp_san_dbf_record *rec = (struct zfcp_san_dbf_record *)in_buf;
630 char *buffer = NULL;
631 int buflen = 0, total = 0;
632 int len = 0;
633
634 if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
635 return 0;
636
637 len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
638 len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
639 rec->fsf_reqid);
640 len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
641 rec->fsf_seqno);
642 len += zfcp_dbf_view(out_buf + len, "s_id", "0x%06x", rec->s_id);
643 len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x", rec->d_id);
644
645 if (strncmp(rec->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
646 len += zfcp_dbf_view(out_buf + len, "cmd_req_code", "0x%04x",
647 rec->type.ct.type.request.cmd_req_code);
648 len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
649 rec->type.ct.type.request.revision);
650 len += zfcp_dbf_view(out_buf + len, "gs_type", "0x%02x",
651 rec->type.ct.type.request.gs_type);
652 len += zfcp_dbf_view(out_buf + len, "gs_subtype", "0x%02x",
653 rec->type.ct.type.request.gs_subtype);
654 len += zfcp_dbf_view(out_buf + len, "options", "0x%02x",
655 rec->type.ct.type.request.options);
656 len += zfcp_dbf_view(out_buf + len, "max_res_size", "0x%04x",
657 rec->type.ct.type.request.max_res_size);
658 total = rec->type.ct.payload_size;
659 buffer = rec->type.ct.payload;
660 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
661 } else if (strncmp(rec->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
662 len += zfcp_dbf_view(out_buf + len, "cmd_rsp_code", "0x%04x",
663 rec->type.ct.type.response.cmd_rsp_code);
664 len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
665 rec->type.ct.type.response.revision);
666 len += zfcp_dbf_view(out_buf + len, "reason_code", "0x%02x",
667 rec->type.ct.type.response.reason_code);
668 len +=
669 zfcp_dbf_view(out_buf + len, "reason_code_expl", "0x%02x",
670 rec->type.ct.type.response.reason_code_expl);
671 len +=
672 zfcp_dbf_view(out_buf + len, "vendor_unique", "0x%02x",
673 rec->type.ct.type.response.vendor_unique);
674 total = rec->type.ct.payload_size;
675 buffer = rec->type.ct.payload;
676 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
677 } else if (strncmp(rec->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
678 strncmp(rec->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
679 strncmp(rec->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
680 len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
681 rec->type.els.ls_code);
682 total = rec->type.els.payload_size;
683 buffer = rec->type.els.payload;
684 buflen = min(total, ZFCP_DBF_ELS_PAYLOAD);
685 }
686
687 len += zfcp_dbf_view_dump(out_buf + len, "payload",
688 buffer, buflen, 0, total);
689
690 if (buflen == total)
691 len += sprintf(out_buf + len, "\n");
692
693 return len;
694 }
695
696 struct debug_view zfcp_san_dbf_view = {
697 "structured",
698 NULL,
699 &zfcp_dbf_view_header,
700 &zfcp_san_dbf_view_format,
701 NULL,
702 NULL
703 };
704
705 static inline void
706 _zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level,
707 struct zfcp_adapter *adapter,
708 struct scsi_cmnd *scsi_cmnd,
709 struct zfcp_fsf_req *fsf_req,
710 unsigned long old_req_id)
711 {
712 struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
713 struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
714 unsigned long flags;
715 struct fcp_rsp_iu *fcp_rsp;
716 char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
717 int offset = 0, buflen = 0;
718
719 spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
720 do {
721 memset(rec, 0, sizeof(struct zfcp_scsi_dbf_record));
722 if (offset == 0) {
723 strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
724 strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
725 if (scsi_cmnd != NULL) {
726 if (scsi_cmnd->device) {
727 rec->scsi_id = scsi_cmnd->device->id;
728 rec->scsi_lun = scsi_cmnd->device->lun;
729 }
730 rec->scsi_result = scsi_cmnd->result;
731 rec->scsi_cmnd = (unsigned long)scsi_cmnd;
732 rec->scsi_serial = scsi_cmnd->serial_number;
733 memcpy(rec->scsi_opcode, &scsi_cmnd->cmnd,
734 min((int)scsi_cmnd->cmd_len,
735 ZFCP_DBF_SCSI_OPCODE));
736 rec->scsi_retries = scsi_cmnd->retries;
737 rec->scsi_allowed = scsi_cmnd->allowed;
738 }
739 if (fsf_req != NULL) {
740 fcp_rsp = (struct fcp_rsp_iu *)
741 &(fsf_req->qtcb->bottom.io.fcp_rsp);
742 fcp_rsp_info =
743 zfcp_get_fcp_rsp_info_ptr(fcp_rsp);
744 fcp_sns_info =
745 zfcp_get_fcp_sns_info_ptr(fcp_rsp);
746
747 rec->type.fcp.rsp_validity =
748 fcp_rsp->validity.value;
749 rec->type.fcp.rsp_scsi_status =
750 fcp_rsp->scsi_status;
751 rec->type.fcp.rsp_resid = fcp_rsp->fcp_resid;
752 if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
753 rec->type.fcp.rsp_code =
754 *(fcp_rsp_info + 3);
755 if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
756 buflen = min((int)fcp_rsp->fcp_sns_len,
757 ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
758 rec->type.fcp.sns_info_len = buflen;
759 memcpy(rec->type.fcp.sns_info,
760 fcp_sns_info,
761 min(buflen,
762 ZFCP_DBF_SCSI_FCP_SNS_INFO));
763 offset += min(buflen,
764 ZFCP_DBF_SCSI_FCP_SNS_INFO);
765 }
766
767 rec->fsf_reqid = (unsigned long)fsf_req;
768 rec->fsf_seqno = fsf_req->seq_no;
769 rec->fsf_issued = fsf_req->issued;
770 }
771 rec->type.old_fsf_reqid = old_req_id;
772 } else {
773 strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
774 dump->total_size = buflen;
775 dump->offset = offset;
776 dump->size = min(buflen - offset,
777 (int)sizeof(struct
778 zfcp_scsi_dbf_record) -
779 (int)sizeof(struct zfcp_dbf_dump));
780 memcpy(dump->data, fcp_sns_info + offset, dump->size);
781 offset += dump->size;
782 }
783 debug_event(adapter->scsi_dbf, level,
784 rec, sizeof(struct zfcp_scsi_dbf_record));
785 } while (offset < buflen);
786 spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
787 }
788
789 inline void
790 zfcp_scsi_dbf_event_result(const char *tag, int level,
791 struct zfcp_adapter *adapter,
792 struct scsi_cmnd *scsi_cmnd,
793 struct zfcp_fsf_req *fsf_req)
794 {
795 _zfcp_scsi_dbf_event_common("rslt", tag, level,
796 adapter, scsi_cmnd, fsf_req, 0);
797 }
798
799 inline void
800 zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
801 struct scsi_cmnd *scsi_cmnd,
802 struct zfcp_fsf_req *new_fsf_req,
803 unsigned long old_req_id)
804 {
805 _zfcp_scsi_dbf_event_common("abrt", tag, 1,
806 adapter, scsi_cmnd, new_fsf_req, old_req_id);
807 }
808
809 inline void
810 zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag, struct zfcp_unit *unit,
811 struct scsi_cmnd *scsi_cmnd)
812 {
813 struct zfcp_adapter *adapter = unit->port->adapter;
814
815 _zfcp_scsi_dbf_event_common(flag == FCP_TARGET_RESET ? "trst" : "lrst",
816 tag, 1, adapter, scsi_cmnd, NULL, 0);
817 }
818
819 static int
820 zfcp_scsi_dbf_view_format(debug_info_t * id, struct debug_view *view,
821 char *out_buf, const char *in_buf)
822 {
823 struct zfcp_scsi_dbf_record *rec =
824 (struct zfcp_scsi_dbf_record *)in_buf;
825 int len = 0;
826
827 if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
828 return 0;
829
830 len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
831 len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
832 len += zfcp_dbf_view(out_buf + len, "scsi_id", "0x%08x", rec->scsi_id);
833 len += zfcp_dbf_view(out_buf + len, "scsi_lun", "0x%08x",
834 rec->scsi_lun);
835 len += zfcp_dbf_view(out_buf + len, "scsi_result", "0x%08x",
836 rec->scsi_result);
837 len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
838 rec->scsi_cmnd);
839 len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
840 rec->scsi_serial);
841 len += zfcp_dbf_view_dump(out_buf + len, "scsi_opcode",
842 rec->scsi_opcode,
843 ZFCP_DBF_SCSI_OPCODE,
844 0, ZFCP_DBF_SCSI_OPCODE);
845 len += zfcp_dbf_view(out_buf + len, "scsi_retries", "0x%02x",
846 rec->scsi_retries);
847 len += zfcp_dbf_view(out_buf + len, "scsi_allowed", "0x%02x",
848 rec->scsi_allowed);
849 if (strncmp(rec->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0) {
850 len += zfcp_dbf_view(out_buf + len, "old_fsf_reqid", "0x%0Lx",
851 rec->type.old_fsf_reqid);
852 }
853 len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
854 rec->fsf_reqid);
855 len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
856 rec->fsf_seqno);
857 len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
858 if (strncmp(rec->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
859 len +=
860 zfcp_dbf_view(out_buf + len, "fcp_rsp_validity", "0x%02x",
861 rec->type.fcp.rsp_validity);
862 len +=
863 zfcp_dbf_view(out_buf + len, "fcp_rsp_scsi_status",
864 "0x%02x", rec->type.fcp.rsp_scsi_status);
865 len +=
866 zfcp_dbf_view(out_buf + len, "fcp_rsp_resid", "0x%08x",
867 rec->type.fcp.rsp_resid);
868 len +=
869 zfcp_dbf_view(out_buf + len, "fcp_rsp_code", "0x%08x",
870 rec->type.fcp.rsp_code);
871 len +=
872 zfcp_dbf_view(out_buf + len, "fcp_sns_info_len", "0x%08x",
873 rec->type.fcp.sns_info_len);
874 len +=
875 zfcp_dbf_view_dump(out_buf + len, "fcp_sns_info",
876 rec->type.fcp.sns_info,
877 min((int)rec->type.fcp.sns_info_len,
878 ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
879 rec->type.fcp.sns_info_len);
880 }
881
882 len += sprintf(out_buf + len, "\n");
883
884 return len;
885 }
886
887 struct debug_view zfcp_scsi_dbf_view = {
888 "structured",
889 NULL,
890 &zfcp_dbf_view_header,
891 &zfcp_scsi_dbf_view_format,
892 NULL,
893 NULL
894 };
895
896 /**
897 * zfcp_adapter_debug_register - registers debug feature for an adapter
898 * @adapter: pointer to adapter for which debug features should be registered
899 * return: -ENOMEM on error, 0 otherwise
900 */
901 int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
902 {
903 char dbf_name[DEBUG_MAX_NAME_LEN];
904
905 /* debug feature area which records recovery activity */
906 sprintf(dbf_name, "zfcp_%s_erp", zfcp_get_busid_by_adapter(adapter));
907 adapter->erp_dbf = debug_register(dbf_name, dbfsize, 2,
908 sizeof(struct zfcp_erp_dbf_record));
909 if (!adapter->erp_dbf)
910 goto failed;
911 debug_register_view(adapter->erp_dbf, &debug_hex_ascii_view);
912 debug_set_level(adapter->erp_dbf, 3);
913
914 /* debug feature area which records HBA (FSF and QDIO) conditions */
915 sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter));
916 adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
917 sizeof(struct zfcp_hba_dbf_record));
918 if (!adapter->hba_dbf)
919 goto failed;
920 debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
921 debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
922 debug_set_level(adapter->hba_dbf, 3);
923
924 /* debug feature area which records SAN command failures and recovery */
925 sprintf(dbf_name, "zfcp_%s_san", zfcp_get_busid_by_adapter(adapter));
926 adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
927 sizeof(struct zfcp_san_dbf_record));
928 if (!adapter->san_dbf)
929 goto failed;
930 debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
931 debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
932 debug_set_level(adapter->san_dbf, 6);
933
934 /* debug feature area which records SCSI command failures and recovery */
935 sprintf(dbf_name, "zfcp_%s_scsi", zfcp_get_busid_by_adapter(adapter));
936 adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
937 sizeof(struct zfcp_scsi_dbf_record));
938 if (!adapter->scsi_dbf)
939 goto failed;
940 debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
941 debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
942 debug_set_level(adapter->scsi_dbf, 3);
943
944 return 0;
945
946 failed:
947 zfcp_adapter_debug_unregister(adapter);
948
949 return -ENOMEM;
950 }
951
952 /**
953 * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
954 * @adapter: pointer to adapter for which debug features should be unregistered
955 */
956 void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
957 {
958 debug_unregister(adapter->scsi_dbf);
959 debug_unregister(adapter->san_dbf);
960 debug_unregister(adapter->hba_dbf);
961 debug_unregister(adapter->erp_dbf);
962 adapter->scsi_dbf = NULL;
963 adapter->san_dbf = NULL;
964 adapter->hba_dbf = NULL;
965 adapter->erp_dbf = NULL;
966 }
967
968 #undef ZFCP_LOG_AREA
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