git.oblomov.eu Git - linux-2.6/blob - drivers/s390/scsi/zfcp_dbf.c

   1 /*
   2  *
   3  * linux/drivers/s390/scsi/zfcp_dbf.c
   4  *
   5  * FCP adapter driver for IBM eServer zSeries
   6  *
   7  * Debugging facilities
   8  *
   9  * (C) Copyright IBM Corp. 2005
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2, or (at your option)
  14  * any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 #include <asm/debug.h>
  27 #include <linux/ctype.h>
  28 #include "zfcp_ext.h"
  29
  30 static u32 dbfsize = 4;
  31
  32 module_param(dbfsize, uint, 0400);
  33 MODULE_PARM_DESC(dbfsize,
  34                  "number of pages for each debug feature area (default 4)");
  35
  36 #define ZFCP_LOG_AREA                   ZFCP_LOG_AREA_OTHER
  37
  38 static inline int
  39 zfcp_dbf_stck(char *out_buf, const char *label, unsigned long long stck)
  40 {
  41         unsigned long long sec;
  42         struct timespec xtime;
  43         int len = 0;
  44
  45         stck -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
  46         sec = stck >> 12;
  47         do_div(sec, 1000000);
  48         xtime.tv_sec = sec;
  49         stck -= (sec * 1000000) << 12;
  50         xtime.tv_nsec = ((stck * 1000) >> 12);
  51         len += sprintf(out_buf + len, "%-24s%011lu:%06lu\n",
  52                        label, xtime.tv_sec, xtime.tv_nsec);
  53
  54         return len;
  55 }
  56
  57 static int zfcp_dbf_tag(char *out_buf, const char *label, const char *tag)
  58 {
  59         int len = 0, i;
  60
  61         len += sprintf(out_buf + len, "%-24s", label);
  62         for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
  63                 len += sprintf(out_buf + len, "%c", tag[i]);
  64         len += sprintf(out_buf + len, "\n");
  65
  66         return len;
  67 }
  68
  69 static int
  70 zfcp_dbf_view(char *out_buf, const char *label, const char *format, ...)
  71 {
  72         va_list arg;
  73         int len = 0;
  74
  75         len += sprintf(out_buf + len, "%-24s", label);
  76         va_start(arg, format);
  77         len += vsprintf(out_buf + len, format, arg);
  78         va_end(arg);
  79         len += sprintf(out_buf + len, "\n");
  80
  81         return len;
  82 }
  83
  84 static int
  85 zfcp_dbf_view_dump(char *out_buf, const char *label,
  86                    char *buffer, int buflen, int offset, int total_size)
  87 {
  88         int len = 0;
  89
  90         if (offset == 0)
  91                 len += sprintf(out_buf + len, "%-24s  ", label);
  92
  93         while (buflen--) {
  94                 if (offset > 0) {
  95                         if ((offset % 32) == 0)
  96                                 len += sprintf(out_buf + len, "\n%-24c  ", ' ');
  97                         else if ((offset % 4) == 0)
  98                                 len += sprintf(out_buf + len, " ");
  99                 }
 100                 len += sprintf(out_buf + len, "%02x", *buffer++);
 101                 if (++offset == total_size) {
 102                         len += sprintf(out_buf + len, "\n");
 103                         break;
 104                 }
 105         }
 106
 107         if (total_size == 0)
 108                 len += sprintf(out_buf + len, "\n");
 109
 110         return len;
 111 }
 112
 113 static inline int
 114 zfcp_dbf_view_header(debug_info_t * id, struct debug_view *view, int area,
 115                      debug_entry_t * entry, char *out_buf)
 116 {
 117         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
 118         int len = 0;
 119
 120         if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
 121                 len += zfcp_dbf_stck(out_buf + len, "timestamp",
 122                                      entry->id.stck);
 123                 len += zfcp_dbf_view(out_buf + len, "cpu", "%02i",
 124                                      entry->id.fields.cpuid);
 125         } else {
 126                 len += zfcp_dbf_view_dump(out_buf + len, NULL,
 127                                           dump->data,
 128                                           dump->size,
 129                                           dump->offset, dump->total_size);
 130                 if ((dump->offset + dump->size) == dump->total_size)
 131                         len += sprintf(out_buf + len, "\n");
 132         }
 133
 134         return len;
 135 }
 136
 137 inline void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
 138 {
 139         struct zfcp_adapter *adapter = fsf_req->adapter;
 140         struct fsf_qtcb *qtcb = fsf_req->qtcb;
 141         union fsf_prot_status_qual *prot_status_qual =
 142             &qtcb->prefix.prot_status_qual;
 143         union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
 144         struct scsi_cmnd *scsi_cmnd;
 145         struct zfcp_port *port;
 146         struct zfcp_unit *unit;
 147         struct zfcp_send_els *send_els;
 148         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 149         struct zfcp_hba_dbf_record_response *response = &rec->type.response;
 150         int level;
 151         unsigned long flags;
 152
 153         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 154         memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
 155         strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
 156
 157         if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
 158             (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
 159                 strncpy(rec->tag2, "perr", ZFCP_DBF_TAG_SIZE);
 160                 level = 1;
 161         } else if (qtcb->header.fsf_status != FSF_GOOD) {
 162                 strncpy(rec->tag2, "ferr", ZFCP_DBF_TAG_SIZE);
 163                 level = 1;
 164         } else if ((fsf_req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
 165                    (fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) {
 166                 strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE);
 167                 level = 4;
 168         } else if ((prot_status_qual->doubleword[0] != 0) ||
 169                    (prot_status_qual->doubleword[1] != 0) ||
 170                    (fsf_status_qual->doubleword[0] != 0) ||
 171                    (fsf_status_qual->doubleword[1] != 0)) {
 172                 strncpy(rec->tag2, "qual", ZFCP_DBF_TAG_SIZE);
 173                 level = 3;
 174         } else {
 175                 strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE);
 176                 level = 6;
 177         }
 178
 179         response->fsf_command = fsf_req->fsf_command;
 180         response->fsf_reqid = (unsigned long)fsf_req;
 181         response->fsf_seqno = fsf_req->seq_no;
 182         response->fsf_issued = fsf_req->issued;
 183         response->fsf_prot_status = qtcb->prefix.prot_status;
 184         response->fsf_status = qtcb->header.fsf_status;
 185         memcpy(response->fsf_prot_status_qual,
 186                prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
 187         memcpy(response->fsf_status_qual,
 188                fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
 189         response->fsf_req_status = fsf_req->status;
 190         response->sbal_first = fsf_req->sbal_first;
 191         response->sbal_curr = fsf_req->sbal_curr;
 192         response->sbal_last = fsf_req->sbal_last;
 193         response->pool = fsf_req->pool != NULL;
 194         response->erp_action = (unsigned long)fsf_req->erp_action;
 195
 196         switch (fsf_req->fsf_command) {
 197         case FSF_QTCB_FCP_CMND:
 198                 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 199                         break;
 200                 scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
 201                 if (scsi_cmnd != NULL) {
 202                         response->data.send_fcp.scsi_cmnd
 203                             = (unsigned long)scsi_cmnd;
 204                         response->data.send_fcp.scsi_serial
 205                             = scsi_cmnd->serial_number;
 206                 }
 207                 break;
 208
 209         case FSF_QTCB_OPEN_PORT_WITH_DID:
 210         case FSF_QTCB_CLOSE_PORT:
 211         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 212                 port = (struct zfcp_port *)fsf_req->data;
 213                 response->data.port.wwpn = port->wwpn;
 214                 response->data.port.d_id = port->d_id;
 215                 response->data.port.port_handle = qtcb->header.port_handle;
 216                 break;
 217
 218         case FSF_QTCB_OPEN_LUN:
 219         case FSF_QTCB_CLOSE_LUN:
 220                 unit = (struct zfcp_unit *)fsf_req->data;
 221                 port = unit->port;
 222                 response->data.unit.wwpn = port->wwpn;
 223                 response->data.unit.fcp_lun = unit->fcp_lun;
 224                 response->data.unit.port_handle = qtcb->header.port_handle;
 225                 response->data.unit.lun_handle = qtcb->header.lun_handle;
 226                 break;
 227
 228         case FSF_QTCB_SEND_ELS:
 229                 send_els = (struct zfcp_send_els *)fsf_req->data;
 230                 response->data.send_els.d_id = qtcb->bottom.support.d_id;
 231                 response->data.send_els.ls_code = send_els->ls_code >> 24;
 232                 break;
 233
 234         case FSF_QTCB_ABORT_FCP_CMND:
 235         case FSF_QTCB_SEND_GENERIC:
 236         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 237         case FSF_QTCB_EXCHANGE_PORT_DATA:
 238         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 239         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 240                 break;
 241         }
 242
 243         debug_event(adapter->hba_dbf, level,
 244                     rec, sizeof(struct zfcp_hba_dbf_record));
 245         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 246 }
 247
 248 inline void
 249 zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
 250                              struct fsf_status_read_buffer *status_buffer)
 251 {
 252         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 253         unsigned long flags;
 254
 255         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 256         memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
 257         strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
 258         strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
 259
 260         rec->type.status.failed = adapter->status_read_failed;
 261         if (status_buffer != NULL) {
 262                 rec->type.status.status_type = status_buffer->status_type;
 263                 rec->type.status.status_subtype = status_buffer->status_subtype;
 264                 memcpy(&rec->type.status.queue_designator,
 265                        &status_buffer->queue_designator,
 266                        sizeof(struct fsf_queue_designator));
 267
 268                 switch (status_buffer->status_type) {
 269                 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 270                         rec->type.status.payload_size =
 271                             ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
 272                         break;
 273
 274                 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 275                         rec->type.status.payload_size =
 276                             ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
 277                         break;
 278
 279                 case FSF_STATUS_READ_LINK_DOWN:
 280                         switch (status_buffer->status_subtype) {
 281                         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 282                         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 283                                 rec->type.status.payload_size =
 284                                         sizeof(struct fsf_link_down_info);
 285                         }
 286                         break;
 287
 288                 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 289                         rec->type.status.payload_size =
 290                             ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
 291                         break;
 292                 }
 293                 memcpy(&rec->type.status.payload,
 294                        &status_buffer->payload, rec->type.status.payload_size);
 295         }
 296
 297         debug_event(adapter->hba_dbf, 2,
 298                     rec, sizeof(struct zfcp_hba_dbf_record));
 299         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 300 }
 301
 302 inline void
 303 zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter, unsigned int status,
 304                         unsigned int qdio_error, unsigned int siga_error,
 305                         int sbal_index, int sbal_count)
 306 {
 307         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 308         unsigned long flags;
 309
 310         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 311         memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
 312         strncpy(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE);
 313         rec->type.qdio.status = status;
 314         rec->type.qdio.qdio_error = qdio_error;
 315         rec->type.qdio.siga_error = siga_error;
 316         rec->type.qdio.sbal_index = sbal_index;
 317         rec->type.qdio.sbal_count = sbal_count;
 318         debug_event(adapter->hba_dbf, 0,
 319                     rec, sizeof(struct zfcp_hba_dbf_record));
 320         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 321 }
 322
 323 static inline int
 324 zfcp_hba_dbf_view_response(char *out_buf,
 325                            struct zfcp_hba_dbf_record_response *rec)
 326 {
 327         int len = 0;
 328
 329         len += zfcp_dbf_view(out_buf + len, "fsf_command", "0x%08x",
 330                              rec->fsf_command);
 331         len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
 332                              rec->fsf_reqid);
 333         len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
 334                              rec->fsf_seqno);
 335         len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
 336         len += zfcp_dbf_view(out_buf + len, "fsf_prot_status", "0x%08x",
 337                              rec->fsf_prot_status);
 338         len += zfcp_dbf_view(out_buf + len, "fsf_status", "0x%08x",
 339                              rec->fsf_status);
 340         len += zfcp_dbf_view_dump(out_buf + len, "fsf_prot_status_qual",
 341                                   rec->fsf_prot_status_qual,
 342                                   FSF_PROT_STATUS_QUAL_SIZE,
 343                                   0, FSF_PROT_STATUS_QUAL_SIZE);
 344         len += zfcp_dbf_view_dump(out_buf + len, "fsf_status_qual",
 345                                   rec->fsf_status_qual,
 346                                   FSF_STATUS_QUALIFIER_SIZE,
 347                                   0, FSF_STATUS_QUALIFIER_SIZE);
 348         len += zfcp_dbf_view(out_buf + len, "fsf_req_status", "0x%08x",
 349                              rec->fsf_req_status);
 350         len += zfcp_dbf_view(out_buf + len, "sbal_first", "0x%02x",
 351                              rec->sbal_first);
 352         len += zfcp_dbf_view(out_buf + len, "sbal_curr", "0x%02x",
 353                              rec->sbal_curr);
 354         len += zfcp_dbf_view(out_buf + len, "sbal_last", "0x%02x",
 355                              rec->sbal_last);
 356         len += zfcp_dbf_view(out_buf + len, "pool", "0x%02x", rec->pool);
 357
 358         switch (rec->fsf_command) {
 359         case FSF_QTCB_FCP_CMND:
 360                 if (rec->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 361                         break;
 362                 len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
 363                                      rec->data.send_fcp.scsi_cmnd);
 364                 len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
 365                                      rec->data.send_fcp.scsi_serial);
 366                 break;
 367
 368         case FSF_QTCB_OPEN_PORT_WITH_DID:
 369         case FSF_QTCB_CLOSE_PORT:
 370         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 371                 len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
 372                                      rec->data.port.wwpn);
 373                 len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
 374                                      rec->data.port.d_id);
 375                 len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
 376                                      rec->data.port.port_handle);
 377                 break;
 378
 379         case FSF_QTCB_OPEN_LUN:
 380         case FSF_QTCB_CLOSE_LUN:
 381                 len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
 382                                      rec->data.unit.wwpn);
 383                 len += zfcp_dbf_view(out_buf + len, "fcp_lun", "0x%016Lx",
 384                                      rec->data.unit.fcp_lun);
 385                 len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
 386                                      rec->data.unit.port_handle);
 387                 len += zfcp_dbf_view(out_buf + len, "lun_handle", "0x%08x",
 388                                      rec->data.unit.lun_handle);
 389                 break;
 390
 391         case FSF_QTCB_SEND_ELS:
 392                 len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
 393                                      rec->data.send_els.d_id);
 394                 len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
 395                                      rec->data.send_els.ls_code);
 396                 break;
 397
 398         case FSF_QTCB_ABORT_FCP_CMND:
 399         case FSF_QTCB_SEND_GENERIC:
 400         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 401         case FSF_QTCB_EXCHANGE_PORT_DATA:
 402         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 403         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 404                 break;
 405         }
 406
 407         return len;
 408 }
 409
 410 static inline int
 411 zfcp_hba_dbf_view_status(char *out_buf, struct zfcp_hba_dbf_record_status *rec)
 412 {
 413         int len = 0;
 414
 415         len += zfcp_dbf_view(out_buf + len, "failed", "0x%02x", rec->failed);
 416         len += zfcp_dbf_view(out_buf + len, "status_type", "0x%08x",
 417                              rec->status_type);
 418         len += zfcp_dbf_view(out_buf + len, "status_subtype", "0x%08x",
 419                              rec->status_subtype);
 420         len += zfcp_dbf_view_dump(out_buf + len, "queue_designator",
 421                                   (char *)&rec->queue_designator,
 422                                   sizeof(struct fsf_queue_designator),
 423                                   0, sizeof(struct fsf_queue_designator));
 424         len += zfcp_dbf_view_dump(out_buf + len, "payload",
 425                                   (char *)&rec->payload,
 426                                   rec->payload_size, 0, rec->payload_size);
 427
 428         return len;
 429 }
 430
 431 static inline int
 432 zfcp_hba_dbf_view_qdio(char *out_buf, struct zfcp_hba_dbf_record_qdio *rec)
 433 {
 434         int len = 0;
 435
 436         len += zfcp_dbf_view(out_buf + len, "status", "0x%08x", rec->status);
 437         len += zfcp_dbf_view(out_buf + len, "qdio_error", "0x%08x",
 438                              rec->qdio_error);
 439         len += zfcp_dbf_view(out_buf + len, "siga_error", "0x%08x",
 440                              rec->siga_error);
 441         len += zfcp_dbf_view(out_buf + len, "sbal_index", "0x%02x",
 442                              rec->sbal_index);
 443         len += zfcp_dbf_view(out_buf + len, "sbal_count", "0x%02x",
 444                              rec->sbal_count);
 445
 446         return len;
 447 }
 448
 449 static int
 450 zfcp_hba_dbf_view_format(debug_info_t * id, struct debug_view *view,
 451                          char *out_buf, const char *in_buf)
 452 {
 453         struct zfcp_hba_dbf_record *rec = (struct zfcp_hba_dbf_record *)in_buf;
 454         int len = 0;
 455
 456         if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 457                 return 0;
 458
 459         len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
 460         if (isalpha(rec->tag2[0]))
 461                 len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
 462         if (strncmp(rec->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
 463                 len += zfcp_hba_dbf_view_response(out_buf + len,
 464                                                   &rec->type.response);
 465         else if (strncmp(rec->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
 466                 len += zfcp_hba_dbf_view_status(out_buf + len,
 467                                                 &rec->type.status);
 468         else if (strncmp(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
 469                 len += zfcp_hba_dbf_view_qdio(out_buf + len, &rec->type.qdio);
 470
 471         len += sprintf(out_buf + len, "\n");
 472
 473         return len;
 474 }
 475
 476 struct debug_view zfcp_hba_dbf_view = {
 477         "structured",
 478         NULL,
 479         &zfcp_dbf_view_header,
 480         &zfcp_hba_dbf_view_format,
 481         NULL,
 482         NULL
 483 };
 484
 485 inline void
 486 _zfcp_san_dbf_event_common_ct(const char *tag, struct zfcp_fsf_req *fsf_req,
 487                               u32 s_id, u32 d_id, void *buffer, int buflen)
 488 {
 489         struct zfcp_send_ct *send_ct = (struct zfcp_send_ct *)fsf_req->data;
 490         struct zfcp_port *port = send_ct->port;
 491         struct zfcp_adapter *adapter = port->adapter;
 492         struct ct_hdr *header = (struct ct_hdr *)buffer;
 493         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
 494         struct zfcp_san_dbf_record_ct *ct = &rec->type.ct;
 495         unsigned long flags;
 496
 497         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 498         memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
 499         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 500         rec->fsf_reqid = (unsigned long)fsf_req;
 501         rec->fsf_seqno = fsf_req->seq_no;
 502         rec->s_id = s_id;
 503         rec->d_id = d_id;
 504         if (strncmp(tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 505                 ct->type.request.cmd_req_code = header->cmd_rsp_code;
 506                 ct->type.request.revision = header->revision;
 507                 ct->type.request.gs_type = header->gs_type;
 508                 ct->type.request.gs_subtype = header->gs_subtype;
 509                 ct->type.request.options = header->options;
 510                 ct->type.request.max_res_size = header->max_res_size;
 511         } else if (strncmp(tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 512                 ct->type.response.cmd_rsp_code = header->cmd_rsp_code;
 513                 ct->type.response.revision = header->revision;
 514                 ct->type.response.reason_code = header->reason_code;
 515                 ct->type.response.reason_code_expl = header->reason_code_expl;
 516                 ct->type.response.vendor_unique = header->vendor_unique;
 517         }
 518         ct->payload_size =
 519             min(buflen - (int)sizeof(struct ct_hdr), ZFCP_DBF_CT_PAYLOAD);
 520         memcpy(ct->payload, buffer + sizeof(struct ct_hdr), ct->payload_size);
 521         debug_event(adapter->san_dbf, 3,
 522                     rec, sizeof(struct zfcp_san_dbf_record));
 523         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 524 }
 525
 526 inline void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
 527 {
 528         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 529         struct zfcp_port *port = ct->port;
 530         struct zfcp_adapter *adapter = port->adapter;
 531
 532         _zfcp_san_dbf_event_common_ct("octc", fsf_req,
 533                                       fc_host_port_id(adapter->scsi_host),
 534                                       port->d_id, zfcp_sg_to_address(ct->req),
 535                                       ct->req->length);
 536 }
 537
 538 inline void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
 539 {
 540         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 541         struct zfcp_port *port = ct->port;
 542         struct zfcp_adapter *adapter = port->adapter;
 543
 544         _zfcp_san_dbf_event_common_ct("rctc", fsf_req, port->d_id,
 545                                       fc_host_port_id(adapter->scsi_host),
 546                                       zfcp_sg_to_address(ct->resp),
 547                                       ct->resp->length);
 548 }
 549
 550 static inline void
 551 _zfcp_san_dbf_event_common_els(const char *tag, int level,
 552                                struct zfcp_fsf_req *fsf_req, u32 s_id,
 553                                u32 d_id, u8 ls_code, void *buffer, int buflen)
 554 {
 555         struct zfcp_adapter *adapter = fsf_req->adapter;
 556         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
 557         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
 558         unsigned long flags;
 559         int offset = 0;
 560
 561         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 562         do {
 563                 memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
 564                 if (offset == 0) {
 565                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 566                         rec->fsf_reqid = (unsigned long)fsf_req;
 567                         rec->fsf_seqno = fsf_req->seq_no;
 568                         rec->s_id = s_id;
 569                         rec->d_id = d_id;
 570                         rec->type.els.ls_code = ls_code;
 571                         buflen = min(buflen, ZFCP_DBF_ELS_MAX_PAYLOAD);
 572                         rec->type.els.payload_size = buflen;
 573                         memcpy(rec->type.els.payload,
 574                                buffer, min(buflen, ZFCP_DBF_ELS_PAYLOAD));
 575                         offset += min(buflen, ZFCP_DBF_ELS_PAYLOAD);
 576                 } else {
 577                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
 578                         dump->total_size = buflen;
 579                         dump->offset = offset;
 580                         dump->size = min(buflen - offset,
 581                                          (int)sizeof(struct zfcp_san_dbf_record)
 582                                          - (int)sizeof(struct zfcp_dbf_dump));
 583                         memcpy(dump->data, buffer + offset, dump->size);
 584                         offset += dump->size;
 585                 }
 586                 debug_event(adapter->san_dbf, level,
 587                             rec, sizeof(struct zfcp_san_dbf_record));
 588         } while (offset < buflen);
 589         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 590 }
 591
 592 inline void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
 593 {
 594         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 595
 596         _zfcp_san_dbf_event_common_els("oels", 2, fsf_req,
 597                                        fc_host_port_id(els->adapter->scsi_host),
 598                                        els->d_id,
 599                                        *(u8 *) zfcp_sg_to_address(els->req),
 600                                        zfcp_sg_to_address(els->req),
 601                                        els->req->length);
 602 }
 603
 604 inline void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
 605 {
 606         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 607
 608         _zfcp_san_dbf_event_common_els("rels", 2, fsf_req, els->d_id,
 609                                        fc_host_port_id(els->adapter->scsi_host),
 610                                        *(u8 *) zfcp_sg_to_address(els->req),
 611                                        zfcp_sg_to_address(els->resp),
 612                                        els->resp->length);
 613 }
 614
 615 inline void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
 616 {
 617         struct zfcp_adapter *adapter = fsf_req->adapter;
 618         struct fsf_status_read_buffer *status_buffer =
 619             (struct fsf_status_read_buffer *)fsf_req->data;
 620         int length = (int)status_buffer->length -
 621             (int)((void *)&status_buffer->payload - (void *)status_buffer);
 622
 623         _zfcp_san_dbf_event_common_els("iels", 1, fsf_req, status_buffer->d_id,
 624                                        fc_host_port_id(adapter->scsi_host),
 625                                        *(u8 *) status_buffer->payload,
 626                                        (void *)status_buffer->payload, length);
 627 }
 628
 629 static int
 630 zfcp_san_dbf_view_format(debug_info_t * id, struct debug_view *view,
 631                          char *out_buf, const char *in_buf)
 632 {
 633         struct zfcp_san_dbf_record *rec = (struct zfcp_san_dbf_record *)in_buf;
 634         char *buffer = NULL;
 635         int buflen = 0, total = 0;
 636         int len = 0;
 637
 638         if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 639                 return 0;
 640
 641         len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
 642         len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
 643                              rec->fsf_reqid);
 644         len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
 645                              rec->fsf_seqno);
 646         len += zfcp_dbf_view(out_buf + len, "s_id", "0x%06x", rec->s_id);
 647         len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x", rec->d_id);
 648
 649         if (strncmp(rec->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 650                 len += zfcp_dbf_view(out_buf + len, "cmd_req_code", "0x%04x",
 651                                      rec->type.ct.type.request.cmd_req_code);
 652                 len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
 653                                      rec->type.ct.type.request.revision);
 654                 len += zfcp_dbf_view(out_buf + len, "gs_type", "0x%02x",
 655                                      rec->type.ct.type.request.gs_type);
 656                 len += zfcp_dbf_view(out_buf + len, "gs_subtype", "0x%02x",
 657                                      rec->type.ct.type.request.gs_subtype);
 658                 len += zfcp_dbf_view(out_buf + len, "options", "0x%02x",
 659                                      rec->type.ct.type.request.options);
 660                 len += zfcp_dbf_view(out_buf + len, "max_res_size", "0x%04x",
 661                                      rec->type.ct.type.request.max_res_size);
 662                 total = rec->type.ct.payload_size;
 663                 buffer = rec->type.ct.payload;
 664                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
 665         } else if (strncmp(rec->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 666                 len += zfcp_dbf_view(out_buf + len, "cmd_rsp_code", "0x%04x",
 667                                      rec->type.ct.type.response.cmd_rsp_code);
 668                 len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
 669                                      rec->type.ct.type.response.revision);
 670                 len += zfcp_dbf_view(out_buf + len, "reason_code", "0x%02x",
 671                                      rec->type.ct.type.response.reason_code);
 672                 len +=
 673                     zfcp_dbf_view(out_buf + len, "reason_code_expl", "0x%02x",
 674                                   rec->type.ct.type.response.reason_code_expl);
 675                 len +=
 676                     zfcp_dbf_view(out_buf + len, "vendor_unique", "0x%02x",
 677                                   rec->type.ct.type.response.vendor_unique);
 678                 total = rec->type.ct.payload_size;
 679                 buffer = rec->type.ct.payload;
 680                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
 681         } else if (strncmp(rec->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
 682                    strncmp(rec->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
 683                    strncmp(rec->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
 684                 len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
 685                                      rec->type.els.ls_code);
 686                 total = rec->type.els.payload_size;
 687                 buffer = rec->type.els.payload;
 688                 buflen = min(total, ZFCP_DBF_ELS_PAYLOAD);
 689         }
 690
 691         len += zfcp_dbf_view_dump(out_buf + len, "payload",
 692                                   buffer, buflen, 0, total);
 693
 694         if (buflen == total)
 695                 len += sprintf(out_buf + len, "\n");
 696
 697         return len;
 698 }
 699
 700 struct debug_view zfcp_san_dbf_view = {
 701         "structured",
 702         NULL,
 703         &zfcp_dbf_view_header,
 704         &zfcp_san_dbf_view_format,
 705         NULL,
 706         NULL
 707 };
 708
 709 static inline void
 710 _zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level,
 711                             struct zfcp_adapter *adapter,
 712                             struct scsi_cmnd *scsi_cmnd,
 713                             struct zfcp_fsf_req *new_fsf_req)
 714 {
 715         struct zfcp_fsf_req *fsf_req =
 716             (struct zfcp_fsf_req *)scsi_cmnd->host_scribble;
 717         struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
 718         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
 719         unsigned long flags;
 720         struct fcp_rsp_iu *fcp_rsp;
 721         char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
 722         int offset = 0, buflen = 0;
 723
 724         spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
 725         do {
 726                 memset(rec, 0, sizeof(struct zfcp_scsi_dbf_record));
 727                 if (offset == 0) {
 728                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 729                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
 730                         if (scsi_cmnd->device) {
 731                                 rec->scsi_id = scsi_cmnd->device->id;
 732                                 rec->scsi_lun = scsi_cmnd->device->lun;
 733                         }
 734                         rec->scsi_result = scsi_cmnd->result;
 735                         rec->scsi_cmnd = (unsigned long)scsi_cmnd;
 736                         rec->scsi_serial = scsi_cmnd->serial_number;
 737                         memcpy(rec->scsi_opcode,
 738                                &scsi_cmnd->cmnd,
 739                                min((int)scsi_cmnd->cmd_len,
 740                                    ZFCP_DBF_SCSI_OPCODE));
 741                         rec->scsi_retries = scsi_cmnd->retries;
 742                         rec->scsi_allowed = scsi_cmnd->allowed;
 743                         if (fsf_req != NULL) {
 744                                 fcp_rsp = (struct fcp_rsp_iu *)
 745                                     &(fsf_req->qtcb->bottom.io.fcp_rsp);
 746                                 fcp_rsp_info =
 747                                     zfcp_get_fcp_rsp_info_ptr(fcp_rsp);
 748                                 fcp_sns_info =
 749                                     zfcp_get_fcp_sns_info_ptr(fcp_rsp);
 750
 751                                 rec->type.fcp.rsp_validity =
 752                                     fcp_rsp->validity.value;
 753                                 rec->type.fcp.rsp_scsi_status =
 754                                     fcp_rsp->scsi_status;
 755                                 rec->type.fcp.rsp_resid = fcp_rsp->fcp_resid;
 756                                 if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
 757                                         rec->type.fcp.rsp_code =
 758                                             *(fcp_rsp_info + 3);
 759                                 if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
 760                                         buflen = min((int)fcp_rsp->fcp_sns_len,
 761                                                      ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
 762                                         rec->type.fcp.sns_info_len = buflen;
 763                                         memcpy(rec->type.fcp.sns_info,
 764                                                fcp_sns_info,
 765                                                min(buflen,
 766                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
 767                                         offset += min(buflen,
 768                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
 769                                 }
 770
 771                                 rec->fsf_reqid = (unsigned long)fsf_req;
 772                                 rec->fsf_seqno = fsf_req->seq_no;
 773                                 rec->fsf_issued = fsf_req->issued;
 774                         }
 775                         if (new_fsf_req != NULL) {
 776                                 rec->type.new_fsf_req.fsf_reqid =
 777                                     (unsigned long)
 778                                     new_fsf_req;
 779                                 rec->type.new_fsf_req.fsf_seqno =
 780                                     new_fsf_req->seq_no;
 781                                 rec->type.new_fsf_req.fsf_issued =
 782                                     new_fsf_req->issued;
 783                         }
 784                 } else {
 785                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
 786                         dump->total_size = buflen;
 787                         dump->offset = offset;
 788                         dump->size = min(buflen - offset,
 789                                          (int)sizeof(struct
 790                                                      zfcp_scsi_dbf_record) -
 791                                          (int)sizeof(struct zfcp_dbf_dump));
 792                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
 793                         offset += dump->size;
 794                 }
 795                 debug_event(adapter->scsi_dbf, level,
 796                             rec, sizeof(struct zfcp_scsi_dbf_record));
 797         } while (offset < buflen);
 798         spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
 799 }
 800
 801 inline void
 802 zfcp_scsi_dbf_event_result(const char *tag, int level,
 803                            struct zfcp_adapter *adapter,
 804                            struct scsi_cmnd *scsi_cmnd)
 805 {
 806         _zfcp_scsi_dbf_event_common("rslt",
 807                                     tag, level, adapter, scsi_cmnd, NULL);
 808 }
 809
 810 inline void
 811 zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
 812                           struct scsi_cmnd *scsi_cmnd,
 813                           struct zfcp_fsf_req *new_fsf_req)
 814 {
 815         _zfcp_scsi_dbf_event_common("abrt",
 816                                     tag, 1, adapter, scsi_cmnd, new_fsf_req);
 817 }
 818
 819 inline void
 820 zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag, struct zfcp_unit *unit,
 821                              struct scsi_cmnd *scsi_cmnd)
 822 {
 823         struct zfcp_adapter *adapter = unit->port->adapter;
 824
 825         _zfcp_scsi_dbf_event_common(flag == FCP_TARGET_RESET ? "trst" : "lrst",
 826                                     tag, 1, adapter, scsi_cmnd, NULL);
 827 }
 828
 829 static int
 830 zfcp_scsi_dbf_view_format(debug_info_t * id, struct debug_view *view,
 831                           char *out_buf, const char *in_buf)
 832 {
 833         struct zfcp_scsi_dbf_record *rec =
 834             (struct zfcp_scsi_dbf_record *)in_buf;
 835         int len = 0;
 836
 837         if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 838                 return 0;
 839
 840         len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
 841         len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
 842         len += zfcp_dbf_view(out_buf + len, "scsi_id", "0x%08x", rec->scsi_id);
 843         len += zfcp_dbf_view(out_buf + len, "scsi_lun", "0x%08x",
 844                              rec->scsi_lun);
 845         len += zfcp_dbf_view(out_buf + len, "scsi_result", "0x%08x",
 846                              rec->scsi_result);
 847         len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
 848                              rec->scsi_cmnd);
 849         len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
 850                              rec->scsi_serial);
 851         len += zfcp_dbf_view_dump(out_buf + len, "scsi_opcode",
 852                                   rec->scsi_opcode,
 853                                   ZFCP_DBF_SCSI_OPCODE,
 854                                   0, ZFCP_DBF_SCSI_OPCODE);
 855         len += zfcp_dbf_view(out_buf + len, "scsi_retries", "0x%02x",
 856                              rec->scsi_retries);
 857         len += zfcp_dbf_view(out_buf + len, "scsi_allowed", "0x%02x",
 858                              rec->scsi_allowed);
 859         len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
 860                              rec->fsf_reqid);
 861         len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
 862                              rec->fsf_seqno);
 863         len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
 864         if (strncmp(rec->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
 865                 len +=
 866                     zfcp_dbf_view(out_buf + len, "fcp_rsp_validity", "0x%02x",
 867                                   rec->type.fcp.rsp_validity);
 868                 len +=
 869                     zfcp_dbf_view(out_buf + len, "fcp_rsp_scsi_status",
 870                                   "0x%02x", rec->type.fcp.rsp_scsi_status);
 871                 len +=
 872                     zfcp_dbf_view(out_buf + len, "fcp_rsp_resid", "0x%08x",
 873                                   rec->type.fcp.rsp_resid);
 874                 len +=
 875                     zfcp_dbf_view(out_buf + len, "fcp_rsp_code", "0x%08x",
 876                                   rec->type.fcp.rsp_code);
 877                 len +=
 878                     zfcp_dbf_view(out_buf + len, "fcp_sns_info_len", "0x%08x",
 879                                   rec->type.fcp.sns_info_len);
 880                 len +=
 881                     zfcp_dbf_view_dump(out_buf + len, "fcp_sns_info",
 882                                        rec->type.fcp.sns_info,
 883                                        min((int)rec->type.fcp.sns_info_len,
 884                                            ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
 885                                        rec->type.fcp.sns_info_len);
 886         } else if (strncmp(rec->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0) {
 887                 len += zfcp_dbf_view(out_buf + len, "fsf_reqid_abort", "0x%0Lx",
 888                                      rec->type.new_fsf_req.fsf_reqid);
 889                 len += zfcp_dbf_view(out_buf + len, "fsf_seqno_abort", "0x%08x",
 890                                      rec->type.new_fsf_req.fsf_seqno);
 891                 len += zfcp_dbf_stck(out_buf + len, "fsf_issued",
 892                                      rec->type.new_fsf_req.fsf_issued);
 893         } else if ((strncmp(rec->tag, "trst", ZFCP_DBF_TAG_SIZE) == 0) ||
 894                    (strncmp(rec->tag, "lrst", ZFCP_DBF_TAG_SIZE) == 0)) {
 895                 len += zfcp_dbf_view(out_buf + len, "fsf_reqid_reset", "0x%0Lx",
 896                                      rec->type.new_fsf_req.fsf_reqid);
 897                 len += zfcp_dbf_view(out_buf + len, "fsf_seqno_reset", "0x%08x",
 898                                      rec->type.new_fsf_req.fsf_seqno);
 899                 len += zfcp_dbf_stck(out_buf + len, "fsf_issued",
 900                                      rec->type.new_fsf_req.fsf_issued);
 901         }
 902
 903         len += sprintf(out_buf + len, "\n");
 904
 905         return len;
 906 }
 907
 908 struct debug_view zfcp_scsi_dbf_view = {
 909         "structured",
 910         NULL,
 911         &zfcp_dbf_view_header,
 912         &zfcp_scsi_dbf_view_format,
 913         NULL,
 914         NULL
 915 };
 916
 917 /**
 918  * zfcp_adapter_debug_register - registers debug feature for an adapter
 919  * @adapter: pointer to adapter for which debug features should be registered
 920  * return: -ENOMEM on error, 0 otherwise
 921  */
 922 int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
 923 {
 924         char dbf_name[DEBUG_MAX_NAME_LEN];
 925
 926         /* debug feature area which records recovery activity */
 927         sprintf(dbf_name, "zfcp_%s_erp", zfcp_get_busid_by_adapter(adapter));
 928         adapter->erp_dbf = debug_register(dbf_name, dbfsize, 2,
 929                                           sizeof(struct zfcp_erp_dbf_record));
 930         if (!adapter->erp_dbf)
 931                 goto failed;
 932         debug_register_view(adapter->erp_dbf, &debug_hex_ascii_view);
 933         debug_set_level(adapter->erp_dbf, 3);
 934
 935         /* debug feature area which records HBA (FSF and QDIO) conditions */
 936         sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter));
 937         adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
 938                                           sizeof(struct zfcp_hba_dbf_record));
 939         if (!adapter->hba_dbf)
 940                 goto failed;
 941         debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
 942         debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
 943         debug_set_level(adapter->hba_dbf, 3);
 944
 945         /* debug feature area which records SAN command failures and recovery */
 946         sprintf(dbf_name, "zfcp_%s_san", zfcp_get_busid_by_adapter(adapter));
 947         adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
 948                                           sizeof(struct zfcp_san_dbf_record));
 949         if (!adapter->san_dbf)
 950                 goto failed;
 951         debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
 952         debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
 953         debug_set_level(adapter->san_dbf, 6);
 954
 955         /* debug feature area which records SCSI command failures and recovery */
 956         sprintf(dbf_name, "zfcp_%s_scsi", zfcp_get_busid_by_adapter(adapter));
 957         adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
 958                                            sizeof(struct zfcp_scsi_dbf_record));
 959         if (!adapter->scsi_dbf)
 960                 goto failed;
 961         debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
 962         debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
 963         debug_set_level(adapter->scsi_dbf, 3);
 964
 965         return 0;
 966
 967  failed:
 968         zfcp_adapter_debug_unregister(adapter);
 969
 970         return -ENOMEM;
 971 }
 972
 973 /**
 974  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
 975  * @adapter: pointer to adapter for which debug features should be unregistered
 976  */
 977 void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
 978 {
 979         debug_unregister(adapter->scsi_dbf);
 980         debug_unregister(adapter->san_dbf);
 981         debug_unregister(adapter->hba_dbf);
 982         debug_unregister(adapter->erp_dbf);
 983         adapter->scsi_dbf = NULL;
 984         adapter->san_dbf = NULL;
 985         adapter->hba_dbf = NULL;
 986         adapter->erp_dbf = NULL;
 987 }
 988
 989 #undef ZFCP_LOG_AREA