err.no 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 #define ZFCP_DBF_REVISION "$Revision$"
  27
  28 #include <asm/debug.h>
  29 #include <linux/ctype.h>
  30 #include "zfcp_ext.h"
  31
  32 static u32 dbfsize = 4;
  33
  34 module_param(dbfsize, uint, 0400);
  35 MODULE_PARM_DESC(dbfsize,
  36                  "number of pages for each debug feature area (default 4)");
  37
  38 #define ZFCP_LOG_AREA                   ZFCP_LOG_AREA_OTHER
  39
  40 static inline int
  41 zfcp_dbf_stck(char *out_buf, const char *label, unsigned long long stck)
  42 {
  43         unsigned long long sec;
  44         struct timespec xtime;
  45         int len = 0;
  46
  47         stck -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
  48         sec = stck >> 12;
  49         do_div(sec, 1000000);
  50         xtime.tv_sec = sec;
  51         stck -= (sec * 1000000) << 12;
  52         xtime.tv_nsec = ((stck * 1000) >> 12);
  53         len += sprintf(out_buf + len, "%-24s%011lu:%06lu\n",
  54                        label, xtime.tv_sec, xtime.tv_nsec);
  55
  56         return len;
  57 }
  58
  59 static int zfcp_dbf_tag(char *out_buf, const char *label, const char *tag)
  60 {
  61         int len = 0, i;
  62
  63         len += sprintf(out_buf + len, "%-24s", label);
  64         for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
  65                 len += sprintf(out_buf + len, "%c", tag[i]);
  66         len += sprintf(out_buf + len, "\n");
  67
  68         return len;
  69 }
  70
  71 static int
  72 zfcp_dbf_view(char *out_buf, const char *label, const char *format, ...)
  73 {
  74         va_list arg;
  75         int len = 0;
  76
  77         len += sprintf(out_buf + len, "%-24s", label);
  78         va_start(arg, format);
  79         len += vsprintf(out_buf + len, format, arg);
  80         va_end(arg);
  81         len += sprintf(out_buf + len, "\n");
  82
  83         return len;
  84 }
  85
  86 static int
  87 zfcp_dbf_view_dump(char *out_buf, const char *label,
  88                    char *buffer, int buflen, int offset, int total_size)
  89 {
  90         int len = 0;
  91
  92         if (offset == 0)
  93                 len += sprintf(out_buf + len, "%-24s  ", label);
  94
  95         while (buflen--) {
  96                 if (offset > 0) {
  97                         if ((offset % 32) == 0)
  98                                 len += sprintf(out_buf + len, "\n%-24c  ", ' ');
  99                         else if ((offset % 4) == 0)
 100                                 len += sprintf(out_buf + len, " ");
 101                 }
 102                 len += sprintf(out_buf + len, "%02x", *buffer++);
 103                 if (++offset == total_size) {
 104                         len += sprintf(out_buf + len, "\n");
 105                         break;
 106                 }
 107         }
 108
 109         if (total_size == 0)
 110                 len += sprintf(out_buf + len, "\n");
 111
 112         return len;
 113 }
 114
 115 static inline int
 116 zfcp_dbf_view_header(debug_info_t * id, struct debug_view *view, int area,
 117                      debug_entry_t * entry, char *out_buf)
 118 {
 119         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
 120         int len = 0;
 121
 122         if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
 123                 len += zfcp_dbf_stck(out_buf + len, "timestamp",
 124                                      entry->id.stck);
 125                 len += zfcp_dbf_view(out_buf + len, "cpu", "%02i",
 126                                      entry->id.fields.cpuid);
 127         } else {
 128                 len += zfcp_dbf_view_dump(out_buf + len, NULL,
 129                                           dump->data,
 130                                           dump->size,
 131                                           dump->offset, dump->total_size);
 132                 if ((dump->offset + dump->size) == dump->total_size)
 133                         len += sprintf(out_buf + len, "\n");
 134         }
 135
 136         return len;
 137 }
 138
 139 inline void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
 140 {
 141         struct zfcp_adapter *adapter = fsf_req->adapter;
 142         struct fsf_qtcb *qtcb = fsf_req->qtcb;
 143         union fsf_prot_status_qual *prot_status_qual =
 144             &qtcb->prefix.prot_status_qual;
 145         union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
 146         struct scsi_cmnd *scsi_cmnd;
 147         struct zfcp_port *port;
 148         struct zfcp_unit *unit;
 149         struct zfcp_send_els *send_els;
 150         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 151         struct zfcp_hba_dbf_record_response *response = &rec->type.response;
 152         int level;
 153         unsigned long flags;
 154
 155         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 156         memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
 157         strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
 158
 159         if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
 160             (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
 161                 strncpy(rec->tag2, "perr", ZFCP_DBF_TAG_SIZE);
 162                 level = 1;
 163         } else if (qtcb->header.fsf_status != FSF_GOOD) {
 164                 strncpy(rec->tag2, "ferr", ZFCP_DBF_TAG_SIZE);
 165                 level = 1;
 166         } else if ((fsf_req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
 167                    (fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) {
 168                 strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE);
 169                 level = 4;
 170         } else if ((prot_status_qual->doubleword[0] != 0) ||
 171                    (prot_status_qual->doubleword[1] != 0) ||
 172                    (fsf_status_qual->doubleword[0] != 0) ||
 173                    (fsf_status_qual->doubleword[1] != 0)) {
 174                 strncpy(rec->tag2, "qual", ZFCP_DBF_TAG_SIZE);
 175                 level = 3;
 176         } else {
 177                 strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE);
 178                 level = 6;
 179         }
 180
 181         response->fsf_command = fsf_req->fsf_command;
 182         response->fsf_reqid = (unsigned long)fsf_req;
 183         response->fsf_seqno = fsf_req->seq_no;
 184         response->fsf_issued = fsf_req->issued;
 185         response->fsf_prot_status = qtcb->prefix.prot_status;
 186         response->fsf_status = qtcb->header.fsf_status;
 187         memcpy(response->fsf_prot_status_qual,
 188                prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
 189         memcpy(response->fsf_status_qual,
 190                fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
 191         response->fsf_req_status = fsf_req->status;
 192         response->sbal_first = fsf_req->sbal_first;
 193         response->sbal_curr = fsf_req->sbal_curr;
 194         response->sbal_last = fsf_req->sbal_last;
 195         response->pool = fsf_req->pool != NULL;
 196         response->erp_action = (unsigned long)fsf_req->erp_action;
 197
 198         switch (fsf_req->fsf_command) {
 199         case FSF_QTCB_FCP_CMND:
 200                 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 201                         break;
 202                 scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
 203                 if (scsi_cmnd != NULL) {
 204                         response->data.send_fcp.scsi_cmnd
 205                             = (unsigned long)scsi_cmnd;
 206                         response->data.send_fcp.scsi_serial
 207                             = scsi_cmnd->serial_number;
 208                 }
 209                 break;
 210
 211         case FSF_QTCB_OPEN_PORT_WITH_DID:
 212         case FSF_QTCB_CLOSE_PORT:
 213         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 214                 port = (struct zfcp_port *)fsf_req->data;
 215                 response->data.port.wwpn = port->wwpn;
 216                 response->data.port.d_id = port->d_id;
 217                 response->data.port.port_handle = qtcb->header.port_handle;
 218                 break;
 219
 220         case FSF_QTCB_OPEN_LUN:
 221         case FSF_QTCB_CLOSE_LUN:
 222                 unit = (struct zfcp_unit *)fsf_req->data;
 223                 port = unit->port;
 224                 response->data.unit.wwpn = port->wwpn;
 225                 response->data.unit.fcp_lun = unit->fcp_lun;
 226                 response->data.unit.port_handle = qtcb->header.port_handle;
 227                 response->data.unit.lun_handle = qtcb->header.lun_handle;
 228                 break;
 229
 230         case FSF_QTCB_SEND_ELS:
 231                 send_els = (struct zfcp_send_els *)fsf_req->data;
 232                 response->data.send_els.d_id = qtcb->bottom.support.d_id;
 233                 response->data.send_els.ls_code = send_els->ls_code >> 24;
 234                 break;
 235
 236         case FSF_QTCB_ABORT_FCP_CMND:
 237         case FSF_QTCB_SEND_GENERIC:
 238         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 239         case FSF_QTCB_EXCHANGE_PORT_DATA:
 240         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 241         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 242                 break;
 243         }
 244
 245         debug_event(adapter->hba_dbf, level,
 246                     rec, sizeof(struct zfcp_hba_dbf_record));
 247         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 248 }
 249
 250 inline void
 251 zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
 252                              struct fsf_status_read_buffer *status_buffer)
 253 {
 254         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 255         unsigned long flags;
 256
 257         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 258         memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
 259         strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
 260         strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
 261
 262         rec->type.status.failed = adapter->status_read_failed;
 263         if (status_buffer != NULL) {
 264                 rec->type.status.status_type = status_buffer->status_type;
 265                 rec->type.status.status_subtype = status_buffer->status_subtype;
 266                 memcpy(&rec->type.status.queue_designator,
 267                        &status_buffer->queue_designator,
 268                        sizeof(struct fsf_queue_designator));
 269
 270                 switch (status_buffer->status_type) {
 271                 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 272                         rec->type.status.payload_size =
 273                             ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
 274                         break;
 275
 276                 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 277                         rec->type.status.payload_size =
 278                             ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
 279                         break;
 280
 281                 case FSF_STATUS_READ_LINK_DOWN:
 282                         rec->type.status.payload_size = sizeof(u64);
 283                         break;
 284
 285                 }
 286                 memcpy(&rec->type.status.payload,
 287                        &status_buffer->payload, rec->type.status.payload_size);
 288         }
 289
 290         debug_event(adapter->hba_dbf, 2,
 291                     rec, sizeof(struct zfcp_hba_dbf_record));
 292         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 293 }
 294
 295 inline void
 296 zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter, unsigned int status,
 297                         unsigned int qdio_error, unsigned int siga_error,
 298                         int sbal_index, int sbal_count)
 299 {
 300         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 301         unsigned long flags;
 302
 303         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 304         memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
 305         strncpy(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE);
 306         rec->type.qdio.status = status;
 307         rec->type.qdio.qdio_error = qdio_error;
 308         rec->type.qdio.siga_error = siga_error;
 309         rec->type.qdio.sbal_index = sbal_index;
 310         rec->type.qdio.sbal_count = sbal_count;
 311         debug_event(adapter->hba_dbf, 0,
 312                     rec, sizeof(struct zfcp_hba_dbf_record));
 313         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 314 }
 315
 316 static inline int
 317 zfcp_hba_dbf_view_response(char *out_buf,
 318                            struct zfcp_hba_dbf_record_response *rec)
 319 {
 320         int len = 0;
 321
 322         len += zfcp_dbf_view(out_buf + len, "fsf_command", "0x%08x",
 323                              rec->fsf_command);
 324         len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
 325                              rec->fsf_reqid);
 326         len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
 327                              rec->fsf_seqno);
 328         len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
 329         len += zfcp_dbf_view(out_buf + len, "fsf_prot_status", "0x%08x",
 330                              rec->fsf_prot_status);
 331         len += zfcp_dbf_view(out_buf + len, "fsf_status", "0x%08x",
 332                              rec->fsf_status);
 333         len += zfcp_dbf_view_dump(out_buf + len, "fsf_prot_status_qual",
 334                                   rec->fsf_prot_status_qual,
 335                                   FSF_PROT_STATUS_QUAL_SIZE,
 336                                   0, FSF_PROT_STATUS_QUAL_SIZE);
 337         len += zfcp_dbf_view_dump(out_buf + len, "fsf_status_qual",
 338                                   rec->fsf_status_qual,
 339                                   FSF_STATUS_QUALIFIER_SIZE,
 340                                   0, FSF_STATUS_QUALIFIER_SIZE);
 341         len += zfcp_dbf_view(out_buf + len, "fsf_req_status", "0x%08x",
 342                              rec->fsf_req_status);
 343         len += zfcp_dbf_view(out_buf + len, "sbal_first", "0x%02x",
 344                              rec->sbal_first);
 345         len += zfcp_dbf_view(out_buf + len, "sbal_curr", "0x%02x",
 346                              rec->sbal_curr);
 347         len += zfcp_dbf_view(out_buf + len, "sbal_last", "0x%02x",
 348                              rec->sbal_last);
 349         len += zfcp_dbf_view(out_buf + len, "pool", "0x%02x", rec->pool);
 350
 351         switch (rec->fsf_command) {
 352         case FSF_QTCB_FCP_CMND:
 353                 if (rec->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 354                         break;
 355                 len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
 356                                      rec->data.send_fcp.scsi_cmnd);
 357                 len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
 358                                      rec->data.send_fcp.scsi_serial);
 359                 break;
 360
 361         case FSF_QTCB_OPEN_PORT_WITH_DID:
 362         case FSF_QTCB_CLOSE_PORT:
 363         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 364                 len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
 365                                      rec->data.port.wwpn);
 366                 len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
 367                                      rec->data.port.d_id);
 368                 len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
 369                                      rec->data.port.port_handle);
 370                 break;
 371
 372         case FSF_QTCB_OPEN_LUN:
 373         case FSF_QTCB_CLOSE_LUN:
 374                 len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
 375                                      rec->data.unit.wwpn);
 376                 len += zfcp_dbf_view(out_buf + len, "fcp_lun", "0x%016Lx",
 377                                      rec->data.unit.fcp_lun);
 378                 len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
 379                                      rec->data.unit.port_handle);
 380                 len += zfcp_dbf_view(out_buf + len, "lun_handle", "0x%08x",
 381                                      rec->data.unit.lun_handle);
 382                 break;
 383
 384         case FSF_QTCB_SEND_ELS:
 385                 len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
 386                                      rec->data.send_els.d_id);
 387                 len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
 388                                      rec->data.send_els.ls_code);
 389                 break;
 390
 391         case FSF_QTCB_ABORT_FCP_CMND:
 392         case FSF_QTCB_SEND_GENERIC:
 393         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 394         case FSF_QTCB_EXCHANGE_PORT_DATA:
 395         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 396         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 397                 break;
 398         }
 399
 400         return len;
 401 }
 402
 403 static inline int
 404 zfcp_hba_dbf_view_status(char *out_buf, struct zfcp_hba_dbf_record_status *rec)
 405 {
 406         int len = 0;
 407
 408         len += zfcp_dbf_view(out_buf + len, "failed", "0x%02x", rec->failed);
 409         len += zfcp_dbf_view(out_buf + len, "status_type", "0x%08x",
 410                              rec->status_type);
 411         len += zfcp_dbf_view(out_buf + len, "status_subtype", "0x%08x",
 412                              rec->status_subtype);
 413         len += zfcp_dbf_view_dump(out_buf + len, "queue_designator",
 414                                   (char *)&rec->queue_designator,
 415                                   sizeof(struct fsf_queue_designator),
 416                                   0, sizeof(struct fsf_queue_designator));
 417         len += zfcp_dbf_view_dump(out_buf + len, "payload",
 418                                   (char *)&rec->payload,
 419                                   rec->payload_size, 0, rec->payload_size);
 420
 421         return len;
 422 }
 423
 424 static inline int
 425 zfcp_hba_dbf_view_qdio(char *out_buf, struct zfcp_hba_dbf_record_qdio *rec)
 426 {
 427         int len = 0;
 428
 429         len += zfcp_dbf_view(out_buf + len, "status", "0x%08x", rec->status);
 430         len += zfcp_dbf_view(out_buf + len, "qdio_error", "0x%08x",
 431                              rec->qdio_error);
 432         len += zfcp_dbf_view(out_buf + len, "siga_error", "0x%08x",
 433                              rec->siga_error);
 434         len += zfcp_dbf_view(out_buf + len, "sbal_index", "0x%02x",
 435                              rec->sbal_index);
 436         len += zfcp_dbf_view(out_buf + len, "sbal_count", "0x%02x",
 437                              rec->sbal_count);
 438
 439         return len;
 440 }
 441
 442 static int
 443 zfcp_hba_dbf_view_format(debug_info_t * id, struct debug_view *view,
 444                          char *out_buf, const char *in_buf)
 445 {
 446         struct zfcp_hba_dbf_record *rec = (struct zfcp_hba_dbf_record *)in_buf;
 447         int len = 0;
 448
 449         if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 450                 return 0;
 451
 452         len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
 453         if (isalpha(rec->tag2[0]))
 454                 len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
 455         if (strncmp(rec->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
 456                 len += zfcp_hba_dbf_view_response(out_buf + len,
 457                                                   &rec->type.response);
 458         else if (strncmp(rec->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
 459                 len += zfcp_hba_dbf_view_status(out_buf + len,
 460                                                 &rec->type.status);
 461         else if (strncmp(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
 462                 len += zfcp_hba_dbf_view_qdio(out_buf + len, &rec->type.qdio);
 463
 464         len += sprintf(out_buf + len, "\n");
 465
 466         return len;
 467 }
 468
 469 struct debug_view zfcp_hba_dbf_view = {
 470         "structured",
 471         NULL,
 472         &zfcp_dbf_view_header,
 473         &zfcp_hba_dbf_view_format,
 474         NULL,
 475         NULL
 476 };
 477
 478 inline void
 479 _zfcp_san_dbf_event_common_ct(const char *tag, struct zfcp_fsf_req *fsf_req,
 480                               fc_id_t s_id, fc_id_t d_id,
 481                               void *buffer, int buflen)
 482 {
 483         struct zfcp_send_ct *send_ct = (struct zfcp_send_ct *)fsf_req->data;
 484         struct zfcp_port *port = send_ct->port;
 485         struct zfcp_adapter *adapter = port->adapter;
 486         struct ct_hdr *header = (struct ct_hdr *)buffer;
 487         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
 488         struct zfcp_san_dbf_record_ct *ct = &rec->type.ct;
 489         unsigned long flags;
 490
 491         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 492         memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
 493         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 494         rec->fsf_reqid = (unsigned long)fsf_req;
 495         rec->fsf_seqno = fsf_req->seq_no;
 496         rec->s_id = s_id;
 497         rec->d_id = d_id;
 498         if (strncmp(tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 499                 ct->type.request.cmd_req_code = header->cmd_rsp_code;
 500                 ct->type.request.revision = header->revision;
 501                 ct->type.request.gs_type = header->gs_type;
 502                 ct->type.request.gs_subtype = header->gs_subtype;
 503                 ct->type.request.options = header->options;
 504                 ct->type.request.max_res_size = header->max_res_size;
 505         } else if (strncmp(tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 506                 ct->type.response.cmd_rsp_code = header->cmd_rsp_code;
 507                 ct->type.response.revision = header->revision;
 508                 ct->type.response.reason_code = header->reason_code;
 509                 ct->type.response.reason_code_expl = header->reason_code_expl;
 510                 ct->type.response.vendor_unique = header->vendor_unique;
 511         }
 512         ct->payload_size =
 513             min(buflen - (int)sizeof(struct ct_hdr), ZFCP_DBF_CT_PAYLOAD);
 514         memcpy(ct->payload, buffer + sizeof(struct ct_hdr), ct->payload_size);
 515         debug_event(adapter->san_dbf, 3,
 516                     rec, sizeof(struct zfcp_san_dbf_record));
 517         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 518 }
 519
 520 inline void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
 521 {
 522         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 523         struct zfcp_port *port = ct->port;
 524         struct zfcp_adapter *adapter = port->adapter;
 525
 526         _zfcp_san_dbf_event_common_ct("octc",
 527                                       fsf_req, adapter->s_id, port->d_id,
 528                                       zfcp_sg_to_address(ct->req),
 529                                       ct->req->length);
 530 }
 531
 532 inline void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
 533 {
 534         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 535         struct zfcp_port *port = ct->port;
 536         struct zfcp_adapter *adapter = port->adapter;
 537
 538         _zfcp_san_dbf_event_common_ct("rctc",
 539                                       fsf_req, port->d_id, adapter->s_id,
 540                                       zfcp_sg_to_address(ct->resp),
 541                                       ct->resp->length);
 542 }
 543
 544 static inline void
 545 _zfcp_san_dbf_event_common_els(const char *tag, int level,
 546                                struct zfcp_fsf_req *fsf_req,
 547                                fc_id_t s_id, fc_id_t d_id, u8 ls_code,
 548                                void *buffer, int buflen)
 549 {
 550         struct zfcp_adapter *adapter = fsf_req->adapter;
 551         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
 552         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
 553         unsigned long flags;
 554         int offset = 0;
 555
 556         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 557         do {
 558                 memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
 559                 if (offset == 0) {
 560                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 561                         rec->fsf_reqid = (unsigned long)fsf_req;
 562                         rec->fsf_seqno = fsf_req->seq_no;
 563                         rec->s_id = s_id;
 564                         rec->d_id = d_id;
 565                         rec->type.els.ls_code = ls_code;
 566                         buflen = min(buflen, ZFCP_DBF_ELS_MAX_PAYLOAD);
 567                         rec->type.els.payload_size = buflen;
 568                         memcpy(rec->type.els.payload,
 569                                buffer, min(buflen, ZFCP_DBF_ELS_PAYLOAD));
 570                         offset += min(buflen, ZFCP_DBF_ELS_PAYLOAD);
 571                 } else {
 572                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
 573                         dump->total_size = buflen;
 574                         dump->offset = offset;
 575                         dump->size = min(buflen - offset,
 576                                          (int)sizeof(struct zfcp_san_dbf_record)
 577                                          - (int)sizeof(struct zfcp_dbf_dump));
 578                         memcpy(dump->data, buffer + offset, dump->size);
 579                         offset += dump->size;
 580                 }
 581                 debug_event(adapter->san_dbf, level,
 582                             rec, sizeof(struct zfcp_san_dbf_record));
 583         } while (offset < buflen);
 584         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 585 }
 586
 587 inline void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
 588 {
 589         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 590
 591         _zfcp_san_dbf_event_common_els("oels", 2,
 592                                        fsf_req, els->adapter->s_id, els->d_id,
 593                                        *(u8 *) zfcp_sg_to_address(els->req),
 594                                        zfcp_sg_to_address(els->req),
 595                                        els->req->length);
 596 }
 597
 598 inline void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
 599 {
 600         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 601
 602         _zfcp_san_dbf_event_common_els("rels", 2,
 603                                        fsf_req, els->d_id, els->adapter->s_id,
 604                                        *(u8 *) zfcp_sg_to_address(els->req),
 605                                        zfcp_sg_to_address(els->resp),
 606                                        els->resp->length);
 607 }
 608
 609 inline void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
 610 {
 611         struct zfcp_adapter *adapter = fsf_req->adapter;
 612         struct fsf_status_read_buffer *status_buffer =
 613             (struct fsf_status_read_buffer *)fsf_req->data;
 614         int length = (int)status_buffer->length -
 615             (int)((void *)&status_buffer->payload - (void *)status_buffer);
 616
 617         _zfcp_san_dbf_event_common_els("iels", 1,
 618                                        fsf_req, status_buffer->d_id,
 619                                        adapter->s_id,
 620                                        *(u8 *) status_buffer->payload,
 621                                        (void *)status_buffer->payload, length);
 622 }
 623
 624 static int
 625 zfcp_san_dbf_view_format(debug_info_t * id, struct debug_view *view,
 626                          char *out_buf, const char *in_buf)
 627 {
 628         struct zfcp_san_dbf_record *rec = (struct zfcp_san_dbf_record *)in_buf;
 629         char *buffer = NULL;
 630         int buflen = 0, total = 0;
 631         int len = 0;
 632
 633         if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 634                 return 0;
 635
 636         len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
 637         len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
 638                              rec->fsf_reqid);
 639         len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
 640                              rec->fsf_seqno);
 641         len += zfcp_dbf_view(out_buf + len, "s_id", "0x%06x", rec->s_id);
 642         len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x", rec->d_id);
 643
 644         if (strncmp(rec->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 645                 len += zfcp_dbf_view(out_buf + len, "cmd_req_code", "0x%04x",
 646                                      rec->type.ct.type.request.cmd_req_code);
 647                 len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
 648                                      rec->type.ct.type.request.revision);
 649                 len += zfcp_dbf_view(out_buf + len, "gs_type", "0x%02x",
 650                                      rec->type.ct.type.request.gs_type);
 651                 len += zfcp_dbf_view(out_buf + len, "gs_subtype", "0x%02x",
 652                                      rec->type.ct.type.request.gs_subtype);
 653                 len += zfcp_dbf_view(out_buf + len, "options", "0x%02x",
 654                                      rec->type.ct.type.request.options);
 655                 len += zfcp_dbf_view(out_buf + len, "max_res_size", "0x%04x",
 656                                      rec->type.ct.type.request.max_res_size);
 657                 total = rec->type.ct.payload_size;
 658                 buffer = rec->type.ct.payload;
 659                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
 660         } else if (strncmp(rec->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 661                 len += zfcp_dbf_view(out_buf + len, "cmd_rsp_code", "0x%04x",
 662                                      rec->type.ct.type.response.cmd_rsp_code);
 663                 len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
 664                                      rec->type.ct.type.response.revision);
 665                 len += zfcp_dbf_view(out_buf + len, "reason_code", "0x%02x",
 666                                      rec->type.ct.type.response.reason_code);
 667                 len +=
 668                     zfcp_dbf_view(out_buf + len, "reason_code_expl", "0x%02x",
 669                                   rec->type.ct.type.response.reason_code_expl);
 670                 len +=
 671                     zfcp_dbf_view(out_buf + len, "vendor_unique", "0x%02x",
 672                                   rec->type.ct.type.response.vendor_unique);
 673                 total = rec->type.ct.payload_size;
 674                 buffer = rec->type.ct.payload;
 675                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
 676         } else if (strncmp(rec->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
 677                    strncmp(rec->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
 678                    strncmp(rec->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
 679                 len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
 680                                      rec->type.els.ls_code);
 681                 total = rec->type.els.payload_size;
 682                 buffer = rec->type.els.payload;
 683                 buflen = min(total, ZFCP_DBF_ELS_PAYLOAD);
 684         }
 685
 686         len += zfcp_dbf_view_dump(out_buf + len, "payload",
 687                                   buffer, buflen, 0, total);
 688
 689         if (buflen == total)
 690                 len += sprintf(out_buf + len, "\n");
 691
 692         return len;
 693 }
 694
 695 struct debug_view zfcp_san_dbf_view = {
 696         "structured",
 697         NULL,
 698         &zfcp_dbf_view_header,
 699         &zfcp_san_dbf_view_format,
 700         NULL,
 701         NULL
 702 };
 703
 704 static inline void
 705 _zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level,
 706                             struct zfcp_adapter *adapter,
 707                             struct scsi_cmnd *scsi_cmnd,
 708                             struct zfcp_fsf_req *new_fsf_req)
 709 {
 710         struct zfcp_fsf_req *fsf_req =
 711             (struct zfcp_fsf_req *)scsi_cmnd->host_scribble;
 712         struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
 713         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
 714         unsigned long flags;
 715         struct fcp_rsp_iu *fcp_rsp;
 716         char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
 717         int offset = 0, buflen = 0;
 718
 719         spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
 720         do {
 721                 memset(rec, 0, sizeof(struct zfcp_scsi_dbf_record));
 722                 if (offset == 0) {
 723                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 724                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
 725                         if (scsi_cmnd->device) {
 726                                 rec->scsi_id = scsi_cmnd->device->id;
 727                                 rec->scsi_lun = scsi_cmnd->device->lun;
 728                         }
 729                         rec->scsi_result = scsi_cmnd->result;
 730                         rec->scsi_cmnd = (unsigned long)scsi_cmnd;
 731                         rec->scsi_serial = scsi_cmnd->serial_number;
 732                         memcpy(rec->scsi_opcode,
 733                                &scsi_cmnd->cmnd,
 734                                min((int)scsi_cmnd->cmd_len,
 735                                    ZFCP_DBF_SCSI_OPCODE));
 736                         rec->scsi_retries = scsi_cmnd->retries;
 737                         rec->scsi_allowed = scsi_cmnd->allowed;
 738                         if (fsf_req != NULL) {
 739                                 fcp_rsp = (struct fcp_rsp_iu *)
 740                                     &(fsf_req->qtcb->bottom.io.fcp_rsp);
 741                                 fcp_rsp_info =
 742                                     zfcp_get_fcp_rsp_info_ptr(fcp_rsp);
 743                                 fcp_sns_info =
 744                                     zfcp_get_fcp_sns_info_ptr(fcp_rsp);
 745
 746                                 rec->type.fcp.rsp_validity =
 747                                     fcp_rsp->validity.value;
 748                                 rec->type.fcp.rsp_scsi_status =
 749                                     fcp_rsp->scsi_status;
 750                                 rec->type.fcp.rsp_resid = fcp_rsp->fcp_resid;
 751                                 if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
 752                                         rec->type.fcp.rsp_code =
 753                                             *(fcp_rsp_info + 3);
 754                                 if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
 755                                         buflen = min((int)fcp_rsp->fcp_sns_len,
 756                                                      ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
 757                                         rec->type.fcp.sns_info_len = buflen;
 758                                         memcpy(rec->type.fcp.sns_info,
 759                                                fcp_sns_info,
 760                                                min(buflen,
 761                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
 762                                         offset += min(buflen,
 763                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
 764                                 }
 765
 766                                 rec->fsf_reqid = (unsigned long)fsf_req;
 767                                 rec->fsf_seqno = fsf_req->seq_no;
 768                                 rec->fsf_issued = fsf_req->issued;
 769                         }
 770                         if (new_fsf_req != NULL) {
 771                                 rec->type.new_fsf_req.fsf_reqid =
 772                                     (unsigned long)
 773                                     new_fsf_req;
 774                                 rec->type.new_fsf_req.fsf_seqno =
 775                                     new_fsf_req->seq_no;
 776                                 rec->type.new_fsf_req.fsf_issued =
 777                                     new_fsf_req->issued;
 778                         }
 779                 } else {
 780                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
 781                         dump->total_size = buflen;
 782                         dump->offset = offset;
 783                         dump->size = min(buflen - offset,
 784                                          (int)sizeof(struct
 785                                                      zfcp_scsi_dbf_record) -
 786                                          (int)sizeof(struct zfcp_dbf_dump));
 787                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
 788                         offset += dump->size;
 789                 }
 790                 debug_event(adapter->scsi_dbf, level,
 791                             rec, sizeof(struct zfcp_scsi_dbf_record));
 792         } while (offset < buflen);
 793         spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
 794 }
 795
 796 inline void
 797 zfcp_scsi_dbf_event_result(const char *tag, int level,
 798                            struct zfcp_adapter *adapter,
 799                            struct scsi_cmnd *scsi_cmnd)
 800 {
 801         _zfcp_scsi_dbf_event_common("rslt",
 802                                     tag, level, adapter, scsi_cmnd, NULL);
 803 }
 804
 805 inline void
 806 zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
 807                           struct scsi_cmnd *scsi_cmnd,
 808                           struct zfcp_fsf_req *new_fsf_req)
 809 {
 810         _zfcp_scsi_dbf_event_common("abrt",
 811                                     tag, 1, adapter, scsi_cmnd, new_fsf_req);
 812 }
 813
 814 inline void
 815 zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag, struct zfcp_unit *unit,
 816                              struct scsi_cmnd *scsi_cmnd)
 817 {
 818         struct zfcp_adapter *adapter = unit->port->adapter;
 819
 820         _zfcp_scsi_dbf_event_common(flag == FCP_TARGET_RESET ? "trst" : "lrst",
 821                                     tag, 1, adapter, scsi_cmnd, NULL);
 822 }
 823
 824 static int
 825 zfcp_scsi_dbf_view_format(debug_info_t * id, struct debug_view *view,
 826                           char *out_buf, const char *in_buf)
 827 {
 828         struct zfcp_scsi_dbf_record *rec =
 829             (struct zfcp_scsi_dbf_record *)in_buf;
 830         int len = 0;
 831
 832         if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 833                 return 0;
 834
 835         len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
 836         len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
 837         len += zfcp_dbf_view(out_buf + len, "scsi_id", "0x%08x", rec->scsi_id);
 838         len += zfcp_dbf_view(out_buf + len, "scsi_lun", "0x%08x",
 839                              rec->scsi_lun);
 840         len += zfcp_dbf_view(out_buf + len, "scsi_result", "0x%08x",
 841                              rec->scsi_result);
 842         len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
 843                              rec->scsi_cmnd);
 844         len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
 845                              rec->scsi_serial);
 846         len += zfcp_dbf_view_dump(out_buf + len, "scsi_opcode",
 847                                   rec->scsi_opcode,
 848                                   ZFCP_DBF_SCSI_OPCODE,
 849                                   0, ZFCP_DBF_SCSI_OPCODE);
 850         len += zfcp_dbf_view(out_buf + len, "scsi_retries", "0x%02x",
 851                              rec->scsi_retries);
 852         len += zfcp_dbf_view(out_buf + len, "scsi_allowed", "0x%02x",
 853                              rec->scsi_allowed);
 854         len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
 855                              rec->fsf_reqid);
 856         len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
 857                              rec->fsf_seqno);
 858         len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
 859         if (strncmp(rec->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
 860                 len +=
 861                     zfcp_dbf_view(out_buf + len, "fcp_rsp_validity", "0x%02x",
 862                                   rec->type.fcp.rsp_validity);
 863                 len +=
 864                     zfcp_dbf_view(out_buf + len, "fcp_rsp_scsi_status",
 865                                   "0x%02x", rec->type.fcp.rsp_scsi_status);
 866                 len +=
 867                     zfcp_dbf_view(out_buf + len, "fcp_rsp_resid", "0x%08x",
 868                                   rec->type.fcp.rsp_resid);
 869                 len +=
 870                     zfcp_dbf_view(out_buf + len, "fcp_rsp_code", "0x%08x",
 871                                   rec->type.fcp.rsp_code);
 872                 len +=
 873                     zfcp_dbf_view(out_buf + len, "fcp_sns_info_len", "0x%08x",
 874                                   rec->type.fcp.sns_info_len);
 875                 len +=
 876                     zfcp_dbf_view_dump(out_buf + len, "fcp_sns_info",
 877                                        rec->type.fcp.sns_info,
 878                                        min((int)rec->type.fcp.sns_info_len,
 879                                            ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
 880                                        rec->type.fcp.sns_info_len);
 881         } else if (strncmp(rec->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0) {
 882                 len += zfcp_dbf_view(out_buf + len, "fsf_reqid_abort", "0x%0Lx",
 883                                      rec->type.new_fsf_req.fsf_reqid);
 884                 len += zfcp_dbf_view(out_buf + len, "fsf_seqno_abort", "0x%08x",
 885                                      rec->type.new_fsf_req.fsf_seqno);
 886                 len += zfcp_dbf_stck(out_buf + len, "fsf_issued",
 887                                      rec->type.new_fsf_req.fsf_issued);
 888         } else if ((strncmp(rec->tag, "trst", ZFCP_DBF_TAG_SIZE) == 0) ||
 889                    (strncmp(rec->tag, "lrst", ZFCP_DBF_TAG_SIZE) == 0)) {
 890                 len += zfcp_dbf_view(out_buf + len, "fsf_reqid_reset", "0x%0Lx",
 891                                      rec->type.new_fsf_req.fsf_reqid);
 892                 len += zfcp_dbf_view(out_buf + len, "fsf_seqno_reset", "0x%08x",
 893                                      rec->type.new_fsf_req.fsf_seqno);
 894                 len += zfcp_dbf_stck(out_buf + len, "fsf_issued",
 895                                      rec->type.new_fsf_req.fsf_issued);
 896         }
 897
 898         len += sprintf(out_buf + len, "\n");
 899
 900         return len;
 901 }
 902
 903 struct debug_view zfcp_scsi_dbf_view = {
 904         "structured",
 905         NULL,
 906         &zfcp_dbf_view_header,
 907         &zfcp_scsi_dbf_view_format,
 908         NULL,
 909         NULL
 910 };
 911
 912 /**
 913  * zfcp_adapter_debug_register - registers debug feature for an adapter
 914  * @adapter: pointer to adapter for which debug features should be registered
 915  * return: -ENOMEM on error, 0 otherwise
 916  */
 917 int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
 918 {
 919         char dbf_name[DEBUG_MAX_NAME_LEN];
 920
 921         /* debug feature area which records recovery activity */
 922         spin_lock_init(&adapter->erp_dbf_lock);
 923         sprintf(dbf_name, "zfcp_%s_erp", zfcp_get_busid_by_adapter(adapter));
 924         adapter->erp_dbf = debug_register(dbf_name, dbfsize, 2,
 925                                           sizeof(struct zfcp_erp_dbf_record));
 926         if (!adapter->erp_dbf)
 927                 goto failed;
 928         debug_register_view(adapter->erp_dbf, &debug_hex_ascii_view);
 929         debug_set_level(adapter->erp_dbf, 3);
 930
 931         /* debug feature area which records HBA (FSF and QDIO) conditions */
 932         spin_lock_init(&adapter->hba_dbf_lock);
 933         sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter));
 934         adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
 935                                           sizeof(struct zfcp_hba_dbf_record));
 936         if (!adapter->hba_dbf)
 937                 goto failed;
 938         debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
 939         debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
 940         debug_set_level(adapter->hba_dbf, 3);
 941
 942         /* debug feature area which records SAN command failures and recovery */
 943         spin_lock_init(&adapter->san_dbf_lock);
 944         sprintf(dbf_name, "zfcp_%s_san", zfcp_get_busid_by_adapter(adapter));
 945         adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
 946                                           sizeof(struct zfcp_san_dbf_record));
 947         if (!adapter->san_dbf)
 948                 goto failed;
 949         debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
 950         debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
 951         debug_set_level(adapter->san_dbf, 6);
 952
 953         /* debug feature area which records SCSI command failures and recovery */
 954         spin_lock_init(&adapter->scsi_dbf_lock);
 955         sprintf(dbf_name, "zfcp_%s_scsi", zfcp_get_busid_by_adapter(adapter));
 956         adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
 957                                            sizeof(struct zfcp_scsi_dbf_record));
 958         if (!adapter->scsi_dbf)
 959                 goto failed;
 960         debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
 961         debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
 962         debug_set_level(adapter->scsi_dbf, 3);
 963
 964         return 0;
 965
 966  failed:
 967         zfcp_adapter_debug_unregister(adapter);
 968
 969         return -ENOMEM;
 970 }
 971
 972 /**
 973  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
 974  * @adapter: pointer to adapter for which debug features should be unregistered
 975  */
 976 void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
 977 {
 978         debug_unregister(adapter->scsi_dbf);
 979         debug_unregister(adapter->san_dbf);
 980         debug_unregister(adapter->hba_dbf);
 981         debug_unregister(adapter->erp_dbf);
 982         adapter->scsi_dbf = NULL;
 983         adapter->san_dbf = NULL;
 984         adapter->hba_dbf = NULL;
 985         adapter->erp_dbf = NULL;
 986 }
 987
 988 #undef ZFCP_LOG_AREA