err.no Git - linux-2.6/blob - drivers/s390/scsi/zfcp_dbf.c

   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 <linux/ctype.h>
  23 #include <asm/debug.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 void zfcp_dbf_hexdump(debug_info_t *dbf, void *to, int to_len,
  35                              int level, char *from, int from_len)
  36 {
  37         int offset;
  38         struct zfcp_dbf_dump *dump = to;
  39         int room = to_len - sizeof(*dump);
  40
  41         for (offset = 0; offset < from_len; offset += dump->size) {
  42                 memset(to, 0, to_len);
  43                 strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
  44                 dump->total_size = from_len;
  45                 dump->offset = offset;
  46                 dump->size = min(from_len - offset, room);
  47                 memcpy(dump->data, from + offset, dump->size);
  48                 debug_event(dbf, level, dump, dump->size);
  49         }
  50 }
  51
  52 static int
  53 zfcp_dbf_stck(char *out_buf, const char *label, unsigned long long stck)
  54 {
  55         unsigned long long sec;
  56         struct timespec dbftime;
  57         int len = 0;
  58
  59         stck -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
  60         sec = stck >> 12;
  61         do_div(sec, 1000000);
  62         dbftime.tv_sec = sec;
  63         stck -= (sec * 1000000) << 12;
  64         dbftime.tv_nsec = ((stck * 1000) >> 12);
  65         len += sprintf(out_buf + len, "%-24s%011lu:%06lu\n",
  66                        label, dbftime.tv_sec, dbftime.tv_nsec);
  67
  68         return len;
  69 }
  70
  71 static int zfcp_dbf_tag(char *out_buf, const char *label, const char *tag)
  72 {
  73         int len = 0, i;
  74
  75         len += sprintf(out_buf + len, "%-24s", label);
  76         for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
  77                 len += sprintf(out_buf + len, "%c", tag[i]);
  78         len += sprintf(out_buf + len, "\n");
  79
  80         return len;
  81 }
  82
  83 static int
  84 zfcp_dbf_view(char *out_buf, const char *label, const char *format, ...)
  85 {
  86         va_list arg;
  87         int len = 0;
  88
  89         len += sprintf(out_buf + len, "%-24s", label);
  90         va_start(arg, format);
  91         len += vsprintf(out_buf + len, format, arg);
  92         va_end(arg);
  93         len += sprintf(out_buf + len, "\n");
  94
  95         return len;
  96 }
  97
  98 static void zfcp_dbf_outs(char **buf, const char *s1, const char *s2)
  99 {
 100         *buf += sprintf(*buf, "%-24s%s\n", s1, s2);
 101 }
 102
 103 static void zfcp_dbf_out(char **buf, const char *s, const char *format, ...)
 104 {
 105         va_list arg;
 106
 107         *buf += sprintf(*buf, "%-24s", s);
 108         va_start(arg, format);
 109         *buf += vsprintf(*buf, format, arg);
 110         va_end(arg);
 111         *buf += sprintf(*buf, "\n");
 112 }
 113
 114 static int
 115 zfcp_dbf_view_dump(char *out_buf, const char *label,
 116                    char *buffer, int buflen, int offset, int total_size)
 117 {
 118         int len = 0;
 119
 120         if (offset == 0)
 121                 len += sprintf(out_buf + len, "%-24s  ", label);
 122
 123         while (buflen--) {
 124                 if (offset > 0) {
 125                         if ((offset % 32) == 0)
 126                                 len += sprintf(out_buf + len, "\n%-24c  ", ' ');
 127                         else if ((offset % 4) == 0)
 128                                 len += sprintf(out_buf + len, " ");
 129                 }
 130                 len += sprintf(out_buf + len, "%02x", *buffer++);
 131                 if (++offset == total_size) {
 132                         len += sprintf(out_buf + len, "\n");
 133                         break;
 134                 }
 135         }
 136
 137         if (total_size == 0)
 138                 len += sprintf(out_buf + len, "\n");
 139
 140         return len;
 141 }
 142
 143 static int
 144 zfcp_dbf_view_header(debug_info_t * id, struct debug_view *view, int area,
 145                      debug_entry_t * entry, char *out_buf)
 146 {
 147         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
 148         int len = 0;
 149
 150         if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
 151                 len += zfcp_dbf_stck(out_buf + len, "timestamp",
 152                                      entry->id.stck);
 153                 len += zfcp_dbf_view(out_buf + len, "cpu", "%02i",
 154                                      entry->id.fields.cpuid);
 155         } else {
 156                 len += zfcp_dbf_view_dump(out_buf + len, NULL,
 157                                           dump->data,
 158                                           dump->size,
 159                                           dump->offset, dump->total_size);
 160                 if ((dump->offset + dump->size) == dump->total_size)
 161                         len += sprintf(out_buf + len, "\n");
 162         }
 163
 164         return len;
 165 }
 166
 167 void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
 168 {
 169         struct zfcp_adapter *adapter = fsf_req->adapter;
 170         struct fsf_qtcb *qtcb = fsf_req->qtcb;
 171         union fsf_prot_status_qual *prot_status_qual =
 172             &qtcb->prefix.prot_status_qual;
 173         union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
 174         struct scsi_cmnd *scsi_cmnd;
 175         struct zfcp_port *port;
 176         struct zfcp_unit *unit;
 177         struct zfcp_send_els *send_els;
 178         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 179         struct zfcp_hba_dbf_record_response *response = &rec->type.response;
 180         int level;
 181         unsigned long flags;
 182
 183         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 184         memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
 185         strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
 186
 187         if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
 188             (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
 189                 strncpy(rec->tag2, "perr", ZFCP_DBF_TAG_SIZE);
 190                 level = 1;
 191         } else if (qtcb->header.fsf_status != FSF_GOOD) {
 192                 strncpy(rec->tag2, "ferr", ZFCP_DBF_TAG_SIZE);
 193                 level = 1;
 194         } else if ((fsf_req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
 195                    (fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) {
 196                 strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE);
 197                 level = 4;
 198         } else if (qtcb->header.log_length) {
 199                 strncpy(rec->tag2, "qtcb", ZFCP_DBF_TAG_SIZE);
 200                 level = 5;
 201         } else {
 202                 strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE);
 203                 level = 6;
 204         }
 205
 206         response->fsf_command = fsf_req->fsf_command;
 207         response->fsf_reqid = (unsigned long)fsf_req;
 208         response->fsf_seqno = fsf_req->seq_no;
 209         response->fsf_issued = fsf_req->issued;
 210         response->fsf_prot_status = qtcb->prefix.prot_status;
 211         response->fsf_status = qtcb->header.fsf_status;
 212         memcpy(response->fsf_prot_status_qual,
 213                prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
 214         memcpy(response->fsf_status_qual,
 215                fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
 216         response->fsf_req_status = fsf_req->status;
 217         response->sbal_first = fsf_req->sbal_first;
 218         response->sbal_curr = fsf_req->sbal_curr;
 219         response->sbal_last = fsf_req->sbal_last;
 220         response->pool = fsf_req->pool != NULL;
 221         response->erp_action = (unsigned long)fsf_req->erp_action;
 222
 223         switch (fsf_req->fsf_command) {
 224         case FSF_QTCB_FCP_CMND:
 225                 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 226                         break;
 227                 scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
 228                 if (scsi_cmnd != NULL) {
 229                         response->data.send_fcp.scsi_cmnd
 230                             = (unsigned long)scsi_cmnd;
 231                         response->data.send_fcp.scsi_serial
 232                             = scsi_cmnd->serial_number;
 233                 }
 234                 break;
 235
 236         case FSF_QTCB_OPEN_PORT_WITH_DID:
 237         case FSF_QTCB_CLOSE_PORT:
 238         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 239                 port = (struct zfcp_port *)fsf_req->data;
 240                 response->data.port.wwpn = port->wwpn;
 241                 response->data.port.d_id = port->d_id;
 242                 response->data.port.port_handle = qtcb->header.port_handle;
 243                 break;
 244
 245         case FSF_QTCB_OPEN_LUN:
 246         case FSF_QTCB_CLOSE_LUN:
 247                 unit = (struct zfcp_unit *)fsf_req->data;
 248                 port = unit->port;
 249                 response->data.unit.wwpn = port->wwpn;
 250                 response->data.unit.fcp_lun = unit->fcp_lun;
 251                 response->data.unit.port_handle = qtcb->header.port_handle;
 252                 response->data.unit.lun_handle = qtcb->header.lun_handle;
 253                 break;
 254
 255         case FSF_QTCB_SEND_ELS:
 256                 send_els = (struct zfcp_send_els *)fsf_req->data;
 257                 response->data.send_els.d_id = qtcb->bottom.support.d_id;
 258                 response->data.send_els.ls_code = send_els->ls_code >> 24;
 259                 break;
 260
 261         case FSF_QTCB_ABORT_FCP_CMND:
 262         case FSF_QTCB_SEND_GENERIC:
 263         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 264         case FSF_QTCB_EXCHANGE_PORT_DATA:
 265         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 266         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 267                 break;
 268         }
 269
 270         debug_event(adapter->hba_dbf, level,
 271                     rec, sizeof(struct zfcp_hba_dbf_record));
 272
 273         /* have fcp channel microcode fixed to use as little as possible */
 274         if (fsf_req->fsf_command != FSF_QTCB_FCP_CMND) {
 275                 /* adjust length skipping trailing zeros */
 276                 char *buf = (char *)qtcb + qtcb->header.log_start;
 277                 int len = qtcb->header.log_length;
 278                 for (; len && !buf[len - 1]; len--);
 279                 zfcp_dbf_hexdump(adapter->hba_dbf, rec, sizeof(*rec), level,
 280                                  buf, len);
 281         }
 282
 283         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 284 }
 285
 286 void
 287 zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
 288                              struct fsf_status_read_buffer *status_buffer)
 289 {
 290         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 291         unsigned long flags;
 292
 293         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 294         memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
 295         strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
 296         strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
 297
 298         rec->type.status.failed = adapter->status_read_failed;
 299         if (status_buffer != NULL) {
 300                 rec->type.status.status_type = status_buffer->status_type;
 301                 rec->type.status.status_subtype = status_buffer->status_subtype;
 302                 memcpy(&rec->type.status.queue_designator,
 303                        &status_buffer->queue_designator,
 304                        sizeof(struct fsf_queue_designator));
 305
 306                 switch (status_buffer->status_type) {
 307                 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 308                         rec->type.status.payload_size =
 309                             ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
 310                         break;
 311
 312                 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 313                         rec->type.status.payload_size =
 314                             ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
 315                         break;
 316
 317                 case FSF_STATUS_READ_LINK_DOWN:
 318                         switch (status_buffer->status_subtype) {
 319                         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 320                         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 321                                 rec->type.status.payload_size =
 322                                         sizeof(struct fsf_link_down_info);
 323                         }
 324                         break;
 325
 326                 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 327                         rec->type.status.payload_size =
 328                             ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
 329                         break;
 330                 }
 331                 memcpy(&rec->type.status.payload,
 332                        &status_buffer->payload, rec->type.status.payload_size);
 333         }
 334
 335         debug_event(adapter->hba_dbf, 2,
 336                     rec, sizeof(struct zfcp_hba_dbf_record));
 337         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 338 }
 339
 340 void
 341 zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter, unsigned int status,
 342                         unsigned int qdio_error, unsigned int siga_error,
 343                         int sbal_index, int sbal_count)
 344 {
 345         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 346         unsigned long flags;
 347
 348         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 349         memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
 350         strncpy(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE);
 351         rec->type.qdio.status = status;
 352         rec->type.qdio.qdio_error = qdio_error;
 353         rec->type.qdio.siga_error = siga_error;
 354         rec->type.qdio.sbal_index = sbal_index;
 355         rec->type.qdio.sbal_count = sbal_count;
 356         debug_event(adapter->hba_dbf, 0,
 357                     rec, sizeof(struct zfcp_hba_dbf_record));
 358         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 359 }
 360
 361 static int
 362 zfcp_hba_dbf_view_response(char *out_buf,
 363                            struct zfcp_hba_dbf_record_response *rec)
 364 {
 365         int len = 0;
 366
 367         len += zfcp_dbf_view(out_buf + len, "fsf_command", "0x%08x",
 368                              rec->fsf_command);
 369         len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
 370                              rec->fsf_reqid);
 371         len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
 372                              rec->fsf_seqno);
 373         len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
 374         len += zfcp_dbf_view(out_buf + len, "fsf_prot_status", "0x%08x",
 375                              rec->fsf_prot_status);
 376         len += zfcp_dbf_view(out_buf + len, "fsf_status", "0x%08x",
 377                              rec->fsf_status);
 378         len += zfcp_dbf_view_dump(out_buf + len, "fsf_prot_status_qual",
 379                                   rec->fsf_prot_status_qual,
 380                                   FSF_PROT_STATUS_QUAL_SIZE,
 381                                   0, FSF_PROT_STATUS_QUAL_SIZE);
 382         len += zfcp_dbf_view_dump(out_buf + len, "fsf_status_qual",
 383                                   rec->fsf_status_qual,
 384                                   FSF_STATUS_QUALIFIER_SIZE,
 385                                   0, FSF_STATUS_QUALIFIER_SIZE);
 386         len += zfcp_dbf_view(out_buf + len, "fsf_req_status", "0x%08x",
 387                              rec->fsf_req_status);
 388         len += zfcp_dbf_view(out_buf + len, "sbal_first", "0x%02x",
 389                              rec->sbal_first);
 390         len += zfcp_dbf_view(out_buf + len, "sbal_curr", "0x%02x",
 391                              rec->sbal_curr);
 392         len += zfcp_dbf_view(out_buf + len, "sbal_last", "0x%02x",
 393                              rec->sbal_last);
 394         len += zfcp_dbf_view(out_buf + len, "pool", "0x%02x", rec->pool);
 395
 396         switch (rec->fsf_command) {
 397         case FSF_QTCB_FCP_CMND:
 398                 if (rec->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 399                         break;
 400                 len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
 401                                      rec->data.send_fcp.scsi_cmnd);
 402                 len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
 403                                      rec->data.send_fcp.scsi_serial);
 404                 break;
 405
 406         case FSF_QTCB_OPEN_PORT_WITH_DID:
 407         case FSF_QTCB_CLOSE_PORT:
 408         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 409                 len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
 410                                      rec->data.port.wwpn);
 411                 len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
 412                                      rec->data.port.d_id);
 413                 len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
 414                                      rec->data.port.port_handle);
 415                 break;
 416
 417         case FSF_QTCB_OPEN_LUN:
 418         case FSF_QTCB_CLOSE_LUN:
 419                 len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
 420                                      rec->data.unit.wwpn);
 421                 len += zfcp_dbf_view(out_buf + len, "fcp_lun", "0x%016Lx",
 422                                      rec->data.unit.fcp_lun);
 423                 len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
 424                                      rec->data.unit.port_handle);
 425                 len += zfcp_dbf_view(out_buf + len, "lun_handle", "0x%08x",
 426                                      rec->data.unit.lun_handle);
 427                 break;
 428
 429         case FSF_QTCB_SEND_ELS:
 430                 len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
 431                                      rec->data.send_els.d_id);
 432                 len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
 433                                      rec->data.send_els.ls_code);
 434                 break;
 435
 436         case FSF_QTCB_ABORT_FCP_CMND:
 437         case FSF_QTCB_SEND_GENERIC:
 438         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 439         case FSF_QTCB_EXCHANGE_PORT_DATA:
 440         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 441         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 442                 break;
 443         }
 444
 445         return len;
 446 }
 447
 448 static int
 449 zfcp_hba_dbf_view_status(char *out_buf, struct zfcp_hba_dbf_record_status *rec)
 450 {
 451         int len = 0;
 452
 453         len += zfcp_dbf_view(out_buf + len, "failed", "0x%02x", rec->failed);
 454         len += zfcp_dbf_view(out_buf + len, "status_type", "0x%08x",
 455                              rec->status_type);
 456         len += zfcp_dbf_view(out_buf + len, "status_subtype", "0x%08x",
 457                              rec->status_subtype);
 458         len += zfcp_dbf_view_dump(out_buf + len, "queue_designator",
 459                                   (char *)&rec->queue_designator,
 460                                   sizeof(struct fsf_queue_designator),
 461                                   0, sizeof(struct fsf_queue_designator));
 462         len += zfcp_dbf_view_dump(out_buf + len, "payload",
 463                                   (char *)&rec->payload,
 464                                   rec->payload_size, 0, rec->payload_size);
 465
 466         return len;
 467 }
 468
 469 static int
 470 zfcp_hba_dbf_view_qdio(char *out_buf, struct zfcp_hba_dbf_record_qdio *rec)
 471 {
 472         int len = 0;
 473
 474         len += zfcp_dbf_view(out_buf + len, "status", "0x%08x", rec->status);
 475         len += zfcp_dbf_view(out_buf + len, "qdio_error", "0x%08x",
 476                              rec->qdio_error);
 477         len += zfcp_dbf_view(out_buf + len, "siga_error", "0x%08x",
 478                              rec->siga_error);
 479         len += zfcp_dbf_view(out_buf + len, "sbal_index", "0x%02x",
 480                              rec->sbal_index);
 481         len += zfcp_dbf_view(out_buf + len, "sbal_count", "0x%02x",
 482                              rec->sbal_count);
 483
 484         return len;
 485 }
 486
 487 static int
 488 zfcp_hba_dbf_view_format(debug_info_t * id, struct debug_view *view,
 489                          char *out_buf, const char *in_buf)
 490 {
 491         struct zfcp_hba_dbf_record *rec = (struct zfcp_hba_dbf_record *)in_buf;
 492         int len = 0;
 493
 494         if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 495                 return 0;
 496
 497         len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
 498         if (isalpha(rec->tag2[0]))
 499                 len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
 500         if (strncmp(rec->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
 501                 len += zfcp_hba_dbf_view_response(out_buf + len,
 502                                                   &rec->type.response);
 503         else if (strncmp(rec->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
 504                 len += zfcp_hba_dbf_view_status(out_buf + len,
 505                                                 &rec->type.status);
 506         else if (strncmp(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
 507                 len += zfcp_hba_dbf_view_qdio(out_buf + len, &rec->type.qdio);
 508
 509         len += sprintf(out_buf + len, "\n");
 510
 511         return len;
 512 }
 513
 514 static struct debug_view zfcp_hba_dbf_view = {
 515         "structured",
 516         NULL,
 517         &zfcp_dbf_view_header,
 518         &zfcp_hba_dbf_view_format,
 519         NULL,
 520         NULL
 521 };
 522
 523 static const char *zfcp_rec_dbf_tags[] = {
 524         [ZFCP_REC_DBF_ID_THREAD] = "thread",
 525         [ZFCP_REC_DBF_ID_TARGET] = "target",
 526         [ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
 527 };
 528
 529 static const char *zfcp_rec_dbf_ids[] = {
 530         [1]     = "new",
 531         [2]     = "ready",
 532         [3]     = "kill",
 533         [4]     = "down sleep",
 534         [5]     = "down wakeup",
 535         [6]     = "down sleep ecd",
 536         [7]     = "down wakeup ecd",
 537         [8]     = "down sleep epd",
 538         [9]     = "down wakeup epd",
 539         [10]    = "online",
 540         [11]    = "operational",
 541         [12]    = "scsi slave destroy",
 542         [13]    = "propagate failed adapter",
 543         [14]    = "propagate failed port",
 544         [15]    = "block adapter",
 545         [16]    = "unblock adapter",
 546         [17]    = "block port",
 547         [18]    = "unblock port",
 548         [19]    = "block unit",
 549         [20]    = "unblock unit",
 550         [21]    = "unit recovery failed",
 551         [22]    = "port recovery failed",
 552         [23]    = "adapter recovery failed",
 553         [24]    = "qdio queues down",
 554         [25]    = "p2p failed",
 555         [26]    = "nameserver lookup failed",
 556         [27]    = "nameserver port failed",
 557         [28]    = "link up",
 558         [29]    = "link down",
 559         [30]    = "link up status read",
 560         [31]    = "open port failed",
 561         [32]    = "open port failed",
 562         [33]    = "close port",
 563         [34]    = "open unit failed",
 564         [35]    = "exclusive open unit failed",
 565         [36]    = "shared open unit failed",
 566         [37]    = "link down",
 567         [38]    = "link down status read no link",
 568         [39]    = "link down status read fdisc login",
 569         [40]    = "link down status read firmware update",
 570         [41]    = "link down status read unknown reason",
 571         [42]    = "link down ecd incomplete",
 572         [43]    = "link down epd incomplete",
 573         [44]    = "sysfs adapter recovery",
 574         [45]    = "sysfs port recovery",
 575         [46]    = "sysfs unit recovery",
 576         [47]    = "port boxed abort",
 577         [48]    = "unit boxed abort",
 578         [49]    = "port boxed ct",
 579         [50]    = "port boxed close physical",
 580         [51]    = "port boxed open unit",
 581         [52]    = "port boxed close unit",
 582         [53]    = "port boxed fcp",
 583         [54]    = "unit boxed fcp",
 584         [55]    = "port access denied ct",
 585         [56]    = "port access denied els",
 586         [57]    = "port access denied open port",
 587         [58]    = "port access denied close physical",
 588         [59]    = "unit access denied open unit",
 589         [60]    = "shared unit access denied open unit",
 590         [61]    = "unit access denied fcp",
 591         [62]    = "request timeout",
 592         [63]    = "adisc link test reject or timeout",
 593         [64]    = "adisc link test d_id changed",
 594         [65]    = "adisc link test failed",
 595         [66]    = "recovery out of memory",
 596         [67]    = "adapter recovery repeated after state change",
 597         [68]    = "port recovery repeated after state change",
 598         [69]    = "unit recovery repeated after state change",
 599         [70]    = "port recovery follow-up after successful adapter recovery",
 600         [71]    = "adapter recovery escalation after failed adapter recovery",
 601         [72]    = "port recovery follow-up after successful physical port "
 602                   "recovery",
 603         [73]    = "adapter recovery escalation after failed physical port "
 604                   "recovery",
 605         [74]    = "unit recovery follow-up after successful port recovery",
 606         [75]    = "physical port recovery escalation after failed port "
 607                   "recovery",
 608         [76]    = "port recovery escalation after failed unit recovery",
 609         [77]    = "recovery opening nameserver port",
 610         [78]    = "duplicate request id",
 611         [79]    = "link down",
 612         [80]    = "exclusive read-only unit access unsupported",
 613         [81]    = "shared read-write unit access unsupported",
 614         [82]    = "incoming rscn",
 615         [83]    = "incoming plogi",
 616         [84]    = "incoming logo",
 617         [85]    = "online",
 618         [86]    = "offline",
 619         [87]    = "ccw device gone",
 620         [88]    = "ccw device no path",
 621         [89]    = "ccw device operational",
 622         [90]    = "ccw device shutdown",
 623         [91]    = "sysfs port addition",
 624         [92]    = "sysfs port removal",
 625         [93]    = "sysfs adapter recovery",
 626         [94]    = "sysfs unit addition",
 627         [95]    = "sysfs unit removal",
 628         [96]    = "sysfs port recovery",
 629         [97]    = "sysfs unit recovery",
 630         [98]    = "sequence number mismatch",
 631         [99]    = "link up",
 632         [100]   = "error state",
 633         [101]   = "status read physical port closed",
 634         [102]   = "link up status read",
 635         [103]   = "too many failed status read buffers",
 636         [104]   = "port handle not valid abort",
 637         [105]   = "lun handle not valid abort",
 638         [106]   = "port handle not valid ct",
 639         [107]   = "port handle not valid close port",
 640         [108]   = "port handle not valid close physical port",
 641         [109]   = "port handle not valid open unit",
 642         [110]   = "port handle not valid close unit",
 643         [111]   = "lun handle not valid close unit",
 644         [112]   = "port handle not valid fcp",
 645         [113]   = "lun handle not valid fcp",
 646         [114]   = "handle mismatch fcp",
 647         [115]   = "lun not valid fcp",
 648         [116]   = "qdio send failed",
 649         [117]   = "version mismatch",
 650         [118]   = "incompatible qtcb type",
 651         [119]   = "unknown protocol status",
 652         [120]   = "unknown fsf command",
 653         [121]   = "no recommendation for status qualifier",
 654         [122]   = "status read physical port closed in error",
 655         [123]   = "fc service class not supported ct",
 656         [124]   = "fc service class not supported els",
 657         [125]   = "need newer zfcp",
 658         [126]   = "need newer microcode",
 659         [127]   = "arbitrated loop not supported",
 660         [128]   = "unknown topology",
 661         [129]   = "qtcb size mismatch",
 662         [130]   = "unknown fsf status ecd",
 663         [131]   = "fcp request too big",
 664         [132]   = "fc service class not supported fcp",
 665         [133]   = "data direction not valid fcp",
 666         [134]   = "command length not valid fcp",
 667         [135]   = "status read act update",
 668         [136]   = "status read cfdc update",
 669         [137]   = "hbaapi port open",
 670         [138]   = "hbaapi unit open",
 671         [139]   = "hbaapi unit shutdown",
 672         [140]   = "qdio error",
 673         [141]   = "scsi host reset",
 674 };
 675
 676 static int zfcp_rec_dbf_view_format(debug_info_t *id, struct debug_view *view,
 677                                     char *buf, const char *_rec)
 678 {
 679         struct zfcp_rec_dbf_record *r = (struct zfcp_rec_dbf_record *)_rec;
 680         char *p = buf;
 681
 682         zfcp_dbf_outs(&p, "tag", zfcp_rec_dbf_tags[r->id]);
 683         zfcp_dbf_outs(&p, "hint", zfcp_rec_dbf_ids[r->id2]);
 684         zfcp_dbf_out(&p, "id", "%d", r->id2);
 685         switch (r->id) {
 686         case ZFCP_REC_DBF_ID_THREAD:
 687                 zfcp_dbf_out(&p, "sema", "%d", r->u.thread.sema);
 688                 zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
 689                 zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
 690                 zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
 691                 break;
 692         case ZFCP_REC_DBF_ID_TARGET:
 693                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
 694                 zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
 695                 zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
 696                 zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
 697                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
 698                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
 699                 break;
 700         case ZFCP_REC_DBF_ID_TRIGGER:
 701                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
 702                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
 703                 zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
 704                 zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
 705                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
 706                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
 707                 zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
 708                 zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
 709                 zfcp_dbf_out(&p, "unit_status", "0x%08x", r->u.trigger.us);
 710                 break;
 711         }
 712         sprintf(p, "\n");
 713         return (p - buf) + 1;
 714 }
 715
 716 static struct debug_view zfcp_rec_dbf_view = {
 717         "structured",
 718         NULL,
 719         &zfcp_dbf_view_header,
 720         &zfcp_rec_dbf_view_format,
 721         NULL,
 722         NULL
 723 };
 724
 725 /**
 726  * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
 727  * @id2: identifier for event
 728  * @adapter: adapter
 729  * @lock: non-zero value indicates that erp_lock has not yet been acquired
 730  */
 731 void zfcp_rec_dbf_event_thread(u8 id2, struct zfcp_adapter *adapter, int lock)
 732 {
 733         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 734         unsigned long flags = 0;
 735         struct list_head *entry;
 736         unsigned ready = 0, running = 0, total;
 737
 738         if (lock)
 739                 read_lock_irqsave(&adapter->erp_lock, flags);
 740         list_for_each(entry, &adapter->erp_ready_head)
 741                 ready++;
 742         list_for_each(entry, &adapter->erp_running_head)
 743                 running++;
 744         total = adapter->erp_total_count;
 745         if (lock)
 746                 read_unlock_irqrestore(&adapter->erp_lock, flags);
 747
 748         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 749         memset(r, 0, sizeof(*r));
 750         r->id = ZFCP_REC_DBF_ID_THREAD;
 751         r->id2 = id2;
 752         r->u.thread.sema = atomic_read(&adapter->erp_ready_sem.count);
 753         r->u.thread.total = total;
 754         r->u.thread.ready = ready;
 755         r->u.thread.running = running;
 756         debug_event(adapter->rec_dbf, 5, r, sizeof(*r));
 757         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 758 }
 759
 760 static void zfcp_rec_dbf_event_target(u8 id2, u64 ref,
 761                                       struct zfcp_adapter *adapter,
 762                                       atomic_t *status, atomic_t *erp_count,
 763                                       u64 wwpn, u32 d_id, u64 fcp_lun)
 764 {
 765         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 766         unsigned long flags;
 767
 768         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 769         memset(r, 0, sizeof(*r));
 770         r->id = ZFCP_REC_DBF_ID_TARGET;
 771         r->id2 = id2;
 772         r->u.target.ref = ref;
 773         r->u.target.status = atomic_read(status);
 774         r->u.target.wwpn = wwpn;
 775         r->u.target.d_id = d_id;
 776         r->u.target.fcp_lun = fcp_lun;
 777         r->u.target.erp_count = atomic_read(erp_count);
 778         debug_event(adapter->rec_dbf, 3, r, sizeof(*r));
 779         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 780 }
 781
 782 /**
 783  * zfcp_rec_dbf_event_adapter - trace event for adapter state change
 784  * @id: identifier for trigger of state change
 785  * @ref: additional reference (e.g. request)
 786  * @adapter: adapter
 787  */
 788 void zfcp_rec_dbf_event_adapter(u8 id, u64 ref, struct zfcp_adapter *adapter)
 789 {
 790         zfcp_rec_dbf_event_target(id, ref, adapter, &adapter->status,
 791                                   &adapter->erp_counter, 0, 0, 0);
 792 }
 793
 794 /**
 795  * zfcp_rec_dbf_event_port - trace event for port state change
 796  * @id: identifier for trigger of state change
 797  * @ref: additional reference (e.g. request)
 798  * @port: port
 799  */
 800 void zfcp_rec_dbf_event_port(u8 id, u64 ref, struct zfcp_port *port)
 801 {
 802         struct zfcp_adapter *adapter = port->adapter;
 803
 804         zfcp_rec_dbf_event_target(id, ref, adapter, &port->status,
 805                                   &port->erp_counter, port->wwpn, port->d_id,
 806                                   0);
 807 }
 808
 809 /**
 810  * zfcp_rec_dbf_event_unit - trace event for unit state change
 811  * @id: identifier for trigger of state change
 812  * @ref: additional reference (e.g. request)
 813  * @unit: unit
 814  */
 815 void zfcp_rec_dbf_event_unit(u8 id, u64 ref, struct zfcp_unit *unit)
 816 {
 817         struct zfcp_port *port = unit->port;
 818         struct zfcp_adapter *adapter = port->adapter;
 819
 820         zfcp_rec_dbf_event_target(id, ref, adapter, &unit->status,
 821                                   &unit->erp_counter, port->wwpn, port->d_id,
 822                                   unit->fcp_lun);
 823 }
 824
 825 /**
 826  * zfcp_rec_dbf_event_trigger - trace event for triggered error recovery
 827  * @id2: identifier for error recovery trigger
 828  * @ref: additional reference (e.g. request)
 829  * @want: originally requested error recovery action
 830  * @need: error recovery action actually initiated
 831  * @action: address of error recovery action struct
 832  * @adapter: adapter
 833  * @port: port
 834  * @unit: unit
 835  */
 836 void zfcp_rec_dbf_event_trigger(u8 id2, u64 ref, u8 want, u8 need, u64 action,
 837                                 struct zfcp_adapter *adapter,
 838                                 struct zfcp_port *port, struct zfcp_unit *unit)
 839 {
 840         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 841         unsigned long flags;
 842
 843         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 844         memset(r, 0, sizeof(*r));
 845         r->id = ZFCP_REC_DBF_ID_TRIGGER;
 846         r->id2 = id2;
 847         r->u.trigger.ref = ref;
 848         r->u.trigger.want = want;
 849         r->u.trigger.need = need;
 850         r->u.trigger.action = action;
 851         r->u.trigger.as = atomic_read(&adapter->status);
 852         if (port) {
 853                 r->u.trigger.ps = atomic_read(&port->status);
 854                 r->u.trigger.wwpn = port->wwpn;
 855         }
 856         if (unit) {
 857                 r->u.trigger.us = atomic_read(&unit->status);
 858                 r->u.trigger.fcp_lun = unit->fcp_lun;
 859         }
 860         debug_event(adapter->rec_dbf, action ? 1 : 4, r, sizeof(*r));
 861         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 862 }
 863
 864 static void
 865 _zfcp_san_dbf_event_common_ct(const char *tag, struct zfcp_fsf_req *fsf_req,
 866                               u32 s_id, u32 d_id, void *buffer, int buflen)
 867 {
 868         struct zfcp_send_ct *send_ct = (struct zfcp_send_ct *)fsf_req->data;
 869         struct zfcp_port *port = send_ct->port;
 870         struct zfcp_adapter *adapter = port->adapter;
 871         struct ct_hdr *header = (struct ct_hdr *)buffer;
 872         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
 873         struct zfcp_san_dbf_record_ct *ct = &rec->type.ct;
 874         unsigned long flags;
 875
 876         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 877         memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
 878         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 879         rec->fsf_reqid = (unsigned long)fsf_req;
 880         rec->fsf_seqno = fsf_req->seq_no;
 881         rec->s_id = s_id;
 882         rec->d_id = d_id;
 883         if (strncmp(tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 884                 ct->type.request.cmd_req_code = header->cmd_rsp_code;
 885                 ct->type.request.revision = header->revision;
 886                 ct->type.request.gs_type = header->gs_type;
 887                 ct->type.request.gs_subtype = header->gs_subtype;
 888                 ct->type.request.options = header->options;
 889                 ct->type.request.max_res_size = header->max_res_size;
 890         } else if (strncmp(tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 891                 ct->type.response.cmd_rsp_code = header->cmd_rsp_code;
 892                 ct->type.response.revision = header->revision;
 893                 ct->type.response.reason_code = header->reason_code;
 894                 ct->type.response.reason_code_expl = header->reason_code_expl;
 895                 ct->type.response.vendor_unique = header->vendor_unique;
 896         }
 897         ct->payload_size =
 898             min(buflen - (int)sizeof(struct ct_hdr), ZFCP_DBF_CT_PAYLOAD);
 899         memcpy(ct->payload, buffer + sizeof(struct ct_hdr), ct->payload_size);
 900         debug_event(adapter->san_dbf, 3,
 901                     rec, sizeof(struct zfcp_san_dbf_record));
 902         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 903 }
 904
 905 void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
 906 {
 907         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 908         struct zfcp_port *port = ct->port;
 909         struct zfcp_adapter *adapter = port->adapter;
 910
 911         _zfcp_san_dbf_event_common_ct("octc", fsf_req,
 912                                       fc_host_port_id(adapter->scsi_host),
 913                                       port->d_id, zfcp_sg_to_address(ct->req),
 914                                       ct->req->length);
 915 }
 916
 917 void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
 918 {
 919         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 920         struct zfcp_port *port = ct->port;
 921         struct zfcp_adapter *adapter = port->adapter;
 922
 923         _zfcp_san_dbf_event_common_ct("rctc", fsf_req, port->d_id,
 924                                       fc_host_port_id(adapter->scsi_host),
 925                                       zfcp_sg_to_address(ct->resp),
 926                                       ct->resp->length);
 927 }
 928
 929 static void
 930 _zfcp_san_dbf_event_common_els(const char *tag, int level,
 931                                struct zfcp_fsf_req *fsf_req, u32 s_id,
 932                                u32 d_id, u8 ls_code, void *buffer, int buflen)
 933 {
 934         struct zfcp_adapter *adapter = fsf_req->adapter;
 935         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
 936         unsigned long flags;
 937
 938         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 939         memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
 940         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 941         rec->fsf_reqid = (unsigned long)fsf_req;
 942         rec->fsf_seqno = fsf_req->seq_no;
 943         rec->s_id = s_id;
 944         rec->d_id = d_id;
 945         rec->type.els.ls_code = ls_code;
 946         debug_event(adapter->san_dbf, level, rec, sizeof(*rec));
 947         zfcp_dbf_hexdump(adapter->san_dbf, rec, sizeof(*rec), level,
 948                          buffer, min(buflen, ZFCP_DBF_ELS_MAX_PAYLOAD));
 949         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 950 }
 951
 952 void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
 953 {
 954         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 955
 956         _zfcp_san_dbf_event_common_els("oels", 2, fsf_req,
 957                                        fc_host_port_id(els->adapter->scsi_host),
 958                                        els->d_id,
 959                                        *(u8 *) zfcp_sg_to_address(els->req),
 960                                        zfcp_sg_to_address(els->req),
 961                                        els->req->length);
 962 }
 963
 964 void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
 965 {
 966         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 967
 968         _zfcp_san_dbf_event_common_els("rels", 2, fsf_req, els->d_id,
 969                                        fc_host_port_id(els->adapter->scsi_host),
 970                                        *(u8 *) zfcp_sg_to_address(els->req),
 971                                        zfcp_sg_to_address(els->resp),
 972                                        els->resp->length);
 973 }
 974
 975 void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
 976 {
 977         struct zfcp_adapter *adapter = fsf_req->adapter;
 978         struct fsf_status_read_buffer *status_buffer =
 979             (struct fsf_status_read_buffer *)fsf_req->data;
 980         int length = (int)status_buffer->length -
 981             (int)((void *)&status_buffer->payload - (void *)status_buffer);
 982
 983         _zfcp_san_dbf_event_common_els("iels", 1, fsf_req, status_buffer->d_id,
 984                                        fc_host_port_id(adapter->scsi_host),
 985                                        *(u8 *) status_buffer->payload,
 986                                        (void *)status_buffer->payload, length);
 987 }
 988
 989 static int
 990 zfcp_san_dbf_view_format(debug_info_t * id, struct debug_view *view,
 991                          char *out_buf, const char *in_buf)
 992 {
 993         struct zfcp_san_dbf_record *rec = (struct zfcp_san_dbf_record *)in_buf;
 994         char *buffer = NULL;
 995         int buflen = 0, total = 0;
 996         int len = 0;
 997
 998         if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 999                 return 0;
1000
1001         len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
1002         len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
1003                              rec->fsf_reqid);
1004         len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
1005                              rec->fsf_seqno);
1006         len += zfcp_dbf_view(out_buf + len, "s_id", "0x%06x", rec->s_id);
1007         len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x", rec->d_id);
1008
1009         if (strncmp(rec->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
1010                 len += zfcp_dbf_view(out_buf + len, "cmd_req_code", "0x%04x",
1011                                      rec->type.ct.type.request.cmd_req_code);
1012                 len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
1013                                      rec->type.ct.type.request.revision);
1014                 len += zfcp_dbf_view(out_buf + len, "gs_type", "0x%02x",
1015                                      rec->type.ct.type.request.gs_type);
1016                 len += zfcp_dbf_view(out_buf + len, "gs_subtype", "0x%02x",
1017                                      rec->type.ct.type.request.gs_subtype);
1018                 len += zfcp_dbf_view(out_buf + len, "options", "0x%02x",
1019                                      rec->type.ct.type.request.options);
1020                 len += zfcp_dbf_view(out_buf + len, "max_res_size", "0x%04x",
1021                                      rec->type.ct.type.request.max_res_size);
1022                 total = rec->type.ct.payload_size;
1023                 buffer = rec->type.ct.payload;
1024                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
1025         } else if (strncmp(rec->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
1026                 len += zfcp_dbf_view(out_buf + len, "cmd_rsp_code", "0x%04x",
1027                                      rec->type.ct.type.response.cmd_rsp_code);
1028                 len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
1029                                      rec->type.ct.type.response.revision);
1030                 len += zfcp_dbf_view(out_buf + len, "reason_code", "0x%02x",
1031                                      rec->type.ct.type.response.reason_code);
1032                 len +=
1033                     zfcp_dbf_view(out_buf + len, "reason_code_expl", "0x%02x",
1034                                   rec->type.ct.type.response.reason_code_expl);
1035                 len +=
1036                     zfcp_dbf_view(out_buf + len, "vendor_unique", "0x%02x",
1037                                   rec->type.ct.type.response.vendor_unique);
1038                 total = rec->type.ct.payload_size;
1039                 buffer = rec->type.ct.payload;
1040                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
1041         } else if (strncmp(rec->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
1042                    strncmp(rec->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
1043                    strncmp(rec->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
1044                 len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
1045                                      rec->type.els.ls_code);
1046                 total = rec->type.els.payload_size;
1047                 buffer = rec->type.els.payload;
1048                 buflen = min(total, ZFCP_DBF_ELS_PAYLOAD);
1049         }
1050
1051         len += zfcp_dbf_view_dump(out_buf + len, "payload",
1052                                   buffer, buflen, 0, total);
1053
1054         if (buflen == total)
1055                 len += sprintf(out_buf + len, "\n");
1056
1057         return len;
1058 }
1059
1060 static struct debug_view zfcp_san_dbf_view = {
1061         "structured",
1062         NULL,
1063         &zfcp_dbf_view_header,
1064         &zfcp_san_dbf_view_format,
1065         NULL,
1066         NULL
1067 };
1068
1069 static void
1070 _zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level,
1071                             struct zfcp_adapter *adapter,
1072                             struct scsi_cmnd *scsi_cmnd,
1073                             struct zfcp_fsf_req *fsf_req,
1074                             unsigned long old_req_id)
1075 {
1076         struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
1077         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
1078         unsigned long flags;
1079         struct fcp_rsp_iu *fcp_rsp;
1080         char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
1081         int offset = 0, buflen = 0;
1082
1083         spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
1084         do {
1085                 memset(rec, 0, sizeof(struct zfcp_scsi_dbf_record));
1086                 if (offset == 0) {
1087                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
1088                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
1089                         if (scsi_cmnd != NULL) {
1090                                 if (scsi_cmnd->device) {
1091                                         rec->scsi_id = scsi_cmnd->device->id;
1092                                         rec->scsi_lun = scsi_cmnd->device->lun;
1093                                 }
1094                                 rec->scsi_result = scsi_cmnd->result;
1095                                 rec->scsi_cmnd = (unsigned long)scsi_cmnd;
1096                                 rec->scsi_serial = scsi_cmnd->serial_number;
1097                                 memcpy(rec->scsi_opcode, &scsi_cmnd->cmnd,
1098                                         min((int)scsi_cmnd->cmd_len,
1099                                                 ZFCP_DBF_SCSI_OPCODE));
1100                                 rec->scsi_retries = scsi_cmnd->retries;
1101                                 rec->scsi_allowed = scsi_cmnd->allowed;
1102                         }
1103                         if (fsf_req != NULL) {
1104                                 fcp_rsp = (struct fcp_rsp_iu *)
1105                                     &(fsf_req->qtcb->bottom.io.fcp_rsp);
1106                                 fcp_rsp_info =
1107                                     zfcp_get_fcp_rsp_info_ptr(fcp_rsp);
1108                                 fcp_sns_info =
1109                                     zfcp_get_fcp_sns_info_ptr(fcp_rsp);
1110
1111                                 rec->type.fcp.rsp_validity =
1112                                     fcp_rsp->validity.value;
1113                                 rec->type.fcp.rsp_scsi_status =
1114                                     fcp_rsp->scsi_status;
1115                                 rec->type.fcp.rsp_resid = fcp_rsp->fcp_resid;
1116                                 if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
1117                                         rec->type.fcp.rsp_code =
1118                                             *(fcp_rsp_info + 3);
1119                                 if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
1120                                         buflen = min((int)fcp_rsp->fcp_sns_len,
1121                                                      ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
1122                                         rec->type.fcp.sns_info_len = buflen;
1123                                         memcpy(rec->type.fcp.sns_info,
1124                                                fcp_sns_info,
1125                                                min(buflen,
1126                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
1127                                         offset += min(buflen,
1128                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
1129                                 }
1130
1131                                 rec->fsf_reqid = (unsigned long)fsf_req;
1132                                 rec->fsf_seqno = fsf_req->seq_no;
1133                                 rec->fsf_issued = fsf_req->issued;
1134                         }
1135                         rec->type.old_fsf_reqid = old_req_id;
1136                 } else {
1137                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
1138                         dump->total_size = buflen;
1139                         dump->offset = offset;
1140                         dump->size = min(buflen - offset,
1141                                          (int)sizeof(struct
1142                                                      zfcp_scsi_dbf_record) -
1143                                          (int)sizeof(struct zfcp_dbf_dump));
1144                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
1145                         offset += dump->size;
1146                 }
1147                 debug_event(adapter->scsi_dbf, level,
1148                             rec, sizeof(struct zfcp_scsi_dbf_record));
1149         } while (offset < buflen);
1150         spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
1151 }
1152
1153 void
1154 zfcp_scsi_dbf_event_result(const char *tag, int level,
1155                            struct zfcp_adapter *adapter,
1156                            struct scsi_cmnd *scsi_cmnd,
1157                            struct zfcp_fsf_req *fsf_req)
1158 {
1159         _zfcp_scsi_dbf_event_common("rslt", tag, level,
1160                         adapter, scsi_cmnd, fsf_req, 0);
1161 }
1162
1163 void
1164 zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
1165                           struct scsi_cmnd *scsi_cmnd,
1166                           struct zfcp_fsf_req *new_fsf_req,
1167                           unsigned long old_req_id)
1168 {
1169         _zfcp_scsi_dbf_event_common("abrt", tag, 1,
1170                         adapter, scsi_cmnd, new_fsf_req, old_req_id);
1171 }
1172
1173 void
1174 zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag, struct zfcp_unit *unit,
1175                              struct scsi_cmnd *scsi_cmnd)
1176 {
1177         struct zfcp_adapter *adapter = unit->port->adapter;
1178
1179         _zfcp_scsi_dbf_event_common(flag == FCP_TARGET_RESET ? "trst" : "lrst",
1180                         tag, 1, adapter, scsi_cmnd, NULL, 0);
1181 }
1182
1183 static int
1184 zfcp_scsi_dbf_view_format(debug_info_t * id, struct debug_view *view,
1185                           char *out_buf, const char *in_buf)
1186 {
1187         struct zfcp_scsi_dbf_record *rec =
1188             (struct zfcp_scsi_dbf_record *)in_buf;
1189         int len = 0;
1190
1191         if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
1192                 return 0;
1193
1194         len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
1195         len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
1196         len += zfcp_dbf_view(out_buf + len, "scsi_id", "0x%08x", rec->scsi_id);
1197         len += zfcp_dbf_view(out_buf + len, "scsi_lun", "0x%08x",
1198                              rec->scsi_lun);
1199         len += zfcp_dbf_view(out_buf + len, "scsi_result", "0x%08x",
1200                              rec->scsi_result);
1201         len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
1202                              rec->scsi_cmnd);
1203         len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
1204                              rec->scsi_serial);
1205         len += zfcp_dbf_view_dump(out_buf + len, "scsi_opcode",
1206                                   rec->scsi_opcode,
1207                                   ZFCP_DBF_SCSI_OPCODE,
1208                                   0, ZFCP_DBF_SCSI_OPCODE);
1209         len += zfcp_dbf_view(out_buf + len, "scsi_retries", "0x%02x",
1210                              rec->scsi_retries);
1211         len += zfcp_dbf_view(out_buf + len, "scsi_allowed", "0x%02x",
1212                              rec->scsi_allowed);
1213         if (strncmp(rec->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0) {
1214                 len += zfcp_dbf_view(out_buf + len, "old_fsf_reqid", "0x%0Lx",
1215                                      rec->type.old_fsf_reqid);
1216         }
1217         len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
1218                              rec->fsf_reqid);
1219         len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
1220                              rec->fsf_seqno);
1221         len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
1222         if (strncmp(rec->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
1223                 len +=
1224                     zfcp_dbf_view(out_buf + len, "fcp_rsp_validity", "0x%02x",
1225                                   rec->type.fcp.rsp_validity);
1226                 len +=
1227                     zfcp_dbf_view(out_buf + len, "fcp_rsp_scsi_status",
1228                                   "0x%02x", rec->type.fcp.rsp_scsi_status);
1229                 len +=
1230                     zfcp_dbf_view(out_buf + len, "fcp_rsp_resid", "0x%08x",
1231                                   rec->type.fcp.rsp_resid);
1232                 len +=
1233                     zfcp_dbf_view(out_buf + len, "fcp_rsp_code", "0x%08x",
1234                                   rec->type.fcp.rsp_code);
1235                 len +=
1236                     zfcp_dbf_view(out_buf + len, "fcp_sns_info_len", "0x%08x",
1237                                   rec->type.fcp.sns_info_len);
1238                 len +=
1239                     zfcp_dbf_view_dump(out_buf + len, "fcp_sns_info",
1240                                        rec->type.fcp.sns_info,
1241                                        min((int)rec->type.fcp.sns_info_len,
1242                                            ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
1243                                        rec->type.fcp.sns_info_len);
1244         }
1245
1246         len += sprintf(out_buf + len, "\n");
1247
1248         return len;
1249 }
1250
1251 static struct debug_view zfcp_scsi_dbf_view = {
1252         "structured",
1253         NULL,
1254         &zfcp_dbf_view_header,
1255         &zfcp_scsi_dbf_view_format,
1256         NULL,
1257         NULL
1258 };
1259
1260 /**
1261  * zfcp_adapter_debug_register - registers debug feature for an adapter
1262  * @adapter: pointer to adapter for which debug features should be registered
1263  * return: -ENOMEM on error, 0 otherwise
1264  */
1265 int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
1266 {
1267         char dbf_name[DEBUG_MAX_NAME_LEN];
1268
1269         /* debug feature area which records recovery activity */
1270         sprintf(dbf_name, "zfcp_%s_erp", zfcp_get_busid_by_adapter(adapter));
1271         adapter->erp_dbf = debug_register(dbf_name, dbfsize, 2,
1272                                           sizeof(struct zfcp_erp_dbf_record));
1273         if (!adapter->erp_dbf)
1274                 goto failed;
1275         debug_register_view(adapter->erp_dbf, &debug_hex_ascii_view);
1276         debug_set_level(adapter->erp_dbf, 3);
1277
1278         /* debug feature area which records recovery activity */
1279         sprintf(dbf_name, "zfcp_%s_rec", zfcp_get_busid_by_adapter(adapter));
1280         adapter->rec_dbf = debug_register(dbf_name, dbfsize, 1,
1281                                           sizeof(struct zfcp_rec_dbf_record));
1282         if (!adapter->rec_dbf)
1283                 goto failed;
1284         debug_register_view(adapter->rec_dbf, &debug_hex_ascii_view);
1285         debug_register_view(adapter->rec_dbf, &zfcp_rec_dbf_view);
1286         debug_set_level(adapter->rec_dbf, 3);
1287
1288         /* debug feature area which records HBA (FSF and QDIO) conditions */
1289         sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter));
1290         adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
1291                                           sizeof(struct zfcp_hba_dbf_record));
1292         if (!adapter->hba_dbf)
1293                 goto failed;
1294         debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
1295         debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
1296         debug_set_level(adapter->hba_dbf, 3);
1297
1298         /* debug feature area which records SAN command failures and recovery */
1299         sprintf(dbf_name, "zfcp_%s_san", zfcp_get_busid_by_adapter(adapter));
1300         adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
1301                                           sizeof(struct zfcp_san_dbf_record));
1302         if (!adapter->san_dbf)
1303                 goto failed;
1304         debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
1305         debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
1306         debug_set_level(adapter->san_dbf, 6);
1307
1308         /* debug feature area which records SCSI command failures and recovery */
1309         sprintf(dbf_name, "zfcp_%s_scsi", zfcp_get_busid_by_adapter(adapter));
1310         adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
1311                                            sizeof(struct zfcp_scsi_dbf_record));
1312         if (!adapter->scsi_dbf)
1313                 goto failed;
1314         debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
1315         debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
1316         debug_set_level(adapter->scsi_dbf, 3);
1317
1318         return 0;
1319
1320  failed:
1321         zfcp_adapter_debug_unregister(adapter);
1322
1323         return -ENOMEM;
1324 }
1325
1326 /**
1327  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
1328  * @adapter: pointer to adapter for which debug features should be unregistered
1329  */
1330 void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
1331 {
1332         debug_unregister(adapter->scsi_dbf);
1333         debug_unregister(adapter->san_dbf);
1334         debug_unregister(adapter->hba_dbf);
1335         debug_unregister(adapter->rec_dbf);
1336         debug_unregister(adapter->erp_dbf);
1337         adapter->scsi_dbf = NULL;
1338         adapter->san_dbf = NULL;
1339         adapter->hba_dbf = NULL;
1340         adapter->rec_dbf = NULL;
1341         adapter->erp_dbf = NULL;
1342 }
1343
1344 #undef ZFCP_LOG_AREA