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                         switch (status_buffer->status_subtype) {
 283                         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 284                         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 285                                 rec->type.status.payload_size =
 286                                         sizeof(struct fsf_link_down_info);
 287                         }
 288                         break;
 289
 290                 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 291                         rec->type.status.payload_size =
 292                             ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
 293                         break;
 294                 }
 295                 memcpy(&rec->type.status.payload,
 296                        &status_buffer->payload, rec->type.status.payload_size);
 297         }
 298
 299         debug_event(adapter->hba_dbf, 2,
 300                     rec, sizeof(struct zfcp_hba_dbf_record));
 301         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 302 }
 303
 304 inline void
 305 zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter, unsigned int status,
 306                         unsigned int qdio_error, unsigned int siga_error,
 307                         int sbal_index, int sbal_count)
 308 {
 309         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 310         unsigned long flags;
 311
 312         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 313         memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
 314         strncpy(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE);
 315         rec->type.qdio.status = status;
 316         rec->type.qdio.qdio_error = qdio_error;
 317         rec->type.qdio.siga_error = siga_error;
 318         rec->type.qdio.sbal_index = sbal_index;
 319         rec->type.qdio.sbal_count = sbal_count;
 320         debug_event(adapter->hba_dbf, 0,
 321                     rec, sizeof(struct zfcp_hba_dbf_record));
 322         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 323 }
 324
 325 static inline int
 326 zfcp_hba_dbf_view_response(char *out_buf,
 327                            struct zfcp_hba_dbf_record_response *rec)
 328 {
 329         int len = 0;
 330
 331         len += zfcp_dbf_view(out_buf + len, "fsf_command", "0x%08x",
 332                              rec->fsf_command);
 333         len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
 334                              rec->fsf_reqid);
 335         len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
 336                              rec->fsf_seqno);
 337         len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
 338         len += zfcp_dbf_view(out_buf + len, "fsf_prot_status", "0x%08x",
 339                              rec->fsf_prot_status);
 340         len += zfcp_dbf_view(out_buf + len, "fsf_status", "0x%08x",
 341                              rec->fsf_status);
 342         len += zfcp_dbf_view_dump(out_buf + len, "fsf_prot_status_qual",
 343                                   rec->fsf_prot_status_qual,
 344                                   FSF_PROT_STATUS_QUAL_SIZE,
 345                                   0, FSF_PROT_STATUS_QUAL_SIZE);
 346         len += zfcp_dbf_view_dump(out_buf + len, "fsf_status_qual",
 347                                   rec->fsf_status_qual,
 348                                   FSF_STATUS_QUALIFIER_SIZE,
 349                                   0, FSF_STATUS_QUALIFIER_SIZE);
 350         len += zfcp_dbf_view(out_buf + len, "fsf_req_status", "0x%08x",
 351                              rec->fsf_req_status);
 352         len += zfcp_dbf_view(out_buf + len, "sbal_first", "0x%02x",
 353                              rec->sbal_first);
 354         len += zfcp_dbf_view(out_buf + len, "sbal_curr", "0x%02x",
 355                              rec->sbal_curr);
 356         len += zfcp_dbf_view(out_buf + len, "sbal_last", "0x%02x",
 357                              rec->sbal_last);
 358         len += zfcp_dbf_view(out_buf + len, "pool", "0x%02x", rec->pool);
 359
 360         switch (rec->fsf_command) {
 361         case FSF_QTCB_FCP_CMND:
 362                 if (rec->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 363                         break;
 364                 len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
 365                                      rec->data.send_fcp.scsi_cmnd);
 366                 len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
 367                                      rec->data.send_fcp.scsi_serial);
 368                 break;
 369
 370         case FSF_QTCB_OPEN_PORT_WITH_DID:
 371         case FSF_QTCB_CLOSE_PORT:
 372         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 373                 len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
 374                                      rec->data.port.wwpn);
 375                 len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
 376                                      rec->data.port.d_id);
 377                 len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
 378                                      rec->data.port.port_handle);
 379                 break;
 380
 381         case FSF_QTCB_OPEN_LUN:
 382         case FSF_QTCB_CLOSE_LUN:
 383                 len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
 384                                      rec->data.unit.wwpn);
 385                 len += zfcp_dbf_view(out_buf + len, "fcp_lun", "0x%016Lx",
 386                                      rec->data.unit.fcp_lun);
 387                 len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
 388                                      rec->data.unit.port_handle);
 389                 len += zfcp_dbf_view(out_buf + len, "lun_handle", "0x%08x",
 390                                      rec->data.unit.lun_handle);
 391                 break;
 392
 393         case FSF_QTCB_SEND_ELS:
 394                 len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
 395                                      rec->data.send_els.d_id);
 396                 len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
 397                                      rec->data.send_els.ls_code);
 398                 break;
 399
 400         case FSF_QTCB_ABORT_FCP_CMND:
 401         case FSF_QTCB_SEND_GENERIC:
 402         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 403         case FSF_QTCB_EXCHANGE_PORT_DATA:
 404         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 405         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 406                 break;
 407         }
 408
 409         return len;
 410 }
 411
 412 static inline int
 413 zfcp_hba_dbf_view_status(char *out_buf, struct zfcp_hba_dbf_record_status *rec)
 414 {
 415         int len = 0;
 416
 417         len += zfcp_dbf_view(out_buf + len, "failed", "0x%02x", rec->failed);
 418         len += zfcp_dbf_view(out_buf + len, "status_type", "0x%08x",
 419                              rec->status_type);
 420         len += zfcp_dbf_view(out_buf + len, "status_subtype", "0x%08x",
 421                              rec->status_subtype);
 422         len += zfcp_dbf_view_dump(out_buf + len, "queue_designator",
 423                                   (char *)&rec->queue_designator,
 424                                   sizeof(struct fsf_queue_designator),
 425                                   0, sizeof(struct fsf_queue_designator));
 426         len += zfcp_dbf_view_dump(out_buf + len, "payload",
 427                                   (char *)&rec->payload,
 428                                   rec->payload_size, 0, rec->payload_size);
 429
 430         return len;
 431 }
 432
 433 static inline int
 434 zfcp_hba_dbf_view_qdio(char *out_buf, struct zfcp_hba_dbf_record_qdio *rec)
 435 {
 436         int len = 0;
 437
 438         len += zfcp_dbf_view(out_buf + len, "status", "0x%08x", rec->status);
 439         len += zfcp_dbf_view(out_buf + len, "qdio_error", "0x%08x",
 440                              rec->qdio_error);
 441         len += zfcp_dbf_view(out_buf + len, "siga_error", "0x%08x",
 442                              rec->siga_error);
 443         len += zfcp_dbf_view(out_buf + len, "sbal_index", "0x%02x",
 444                              rec->sbal_index);
 445         len += zfcp_dbf_view(out_buf + len, "sbal_count", "0x%02x",
 446                              rec->sbal_count);
 447
 448         return len;
 449 }
 450
 451 static int
 452 zfcp_hba_dbf_view_format(debug_info_t * id, struct debug_view *view,
 453                          char *out_buf, const char *in_buf)
 454 {
 455         struct zfcp_hba_dbf_record *rec = (struct zfcp_hba_dbf_record *)in_buf;
 456         int len = 0;
 457
 458         if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 459                 return 0;
 460
 461         len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
 462         if (isalpha(rec->tag2[0]))
 463                 len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
 464         if (strncmp(rec->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
 465                 len += zfcp_hba_dbf_view_response(out_buf + len,
 466                                                   &rec->type.response);
 467         else if (strncmp(rec->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
 468                 len += zfcp_hba_dbf_view_status(out_buf + len,
 469                                                 &rec->type.status);
 470         else if (strncmp(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
 471                 len += zfcp_hba_dbf_view_qdio(out_buf + len, &rec->type.qdio);
 472
 473         len += sprintf(out_buf + len, "\n");
 474
 475         return len;
 476 }
 477
 478 struct debug_view zfcp_hba_dbf_view = {
 479         "structured",
 480         NULL,
 481         &zfcp_dbf_view_header,
 482         &zfcp_hba_dbf_view_format,
 483         NULL,
 484         NULL
 485 };
 486
 487 inline void
 488 _zfcp_san_dbf_event_common_ct(const char *tag, struct zfcp_fsf_req *fsf_req,
 489                               fc_id_t s_id, fc_id_t d_id,
 490                               void *buffer, int buflen)
 491 {
 492         struct zfcp_send_ct *send_ct = (struct zfcp_send_ct *)fsf_req->data;
 493         struct zfcp_port *port = send_ct->port;
 494         struct zfcp_adapter *adapter = port->adapter;
 495         struct ct_hdr *header = (struct ct_hdr *)buffer;
 496         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
 497         struct zfcp_san_dbf_record_ct *ct = &rec->type.ct;
 498         unsigned long flags;
 499
 500         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 501         memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
 502         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 503         rec->fsf_reqid = (unsigned long)fsf_req;
 504         rec->fsf_seqno = fsf_req->seq_no;
 505         rec->s_id = s_id;
 506         rec->d_id = d_id;
 507         if (strncmp(tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 508                 ct->type.request.cmd_req_code = header->cmd_rsp_code;
 509                 ct->type.request.revision = header->revision;
 510                 ct->type.request.gs_type = header->gs_type;
 511                 ct->type.request.gs_subtype = header->gs_subtype;
 512                 ct->type.request.options = header->options;
 513                 ct->type.request.max_res_size = header->max_res_size;
 514         } else if (strncmp(tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 515                 ct->type.response.cmd_rsp_code = header->cmd_rsp_code;
 516                 ct->type.response.revision = header->revision;
 517                 ct->type.response.reason_code = header->reason_code;
 518                 ct->type.response.reason_code_expl = header->reason_code_expl;
 519                 ct->type.response.vendor_unique = header->vendor_unique;
 520         }
 521         ct->payload_size =
 522             min(buflen - (int)sizeof(struct ct_hdr), ZFCP_DBF_CT_PAYLOAD);
 523         memcpy(ct->payload, buffer + sizeof(struct ct_hdr), ct->payload_size);
 524         debug_event(adapter->san_dbf, 3,
 525                     rec, sizeof(struct zfcp_san_dbf_record));
 526         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 527 }
 528
 529 inline void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
 530 {
 531         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 532         struct zfcp_port *port = ct->port;
 533         struct zfcp_adapter *adapter = port->adapter;
 534
 535         _zfcp_san_dbf_event_common_ct("octc",
 536                                       fsf_req, adapter->s_id, port->d_id,
 537                                       zfcp_sg_to_address(ct->req),
 538                                       ct->req->length);
 539 }
 540
 541 inline void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
 542 {
 543         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 544         struct zfcp_port *port = ct->port;
 545         struct zfcp_adapter *adapter = port->adapter;
 546
 547         _zfcp_san_dbf_event_common_ct("rctc",
 548                                       fsf_req, port->d_id, adapter->s_id,
 549                                       zfcp_sg_to_address(ct->resp),
 550                                       ct->resp->length);
 551 }
 552
 553 static inline void
 554 _zfcp_san_dbf_event_common_els(const char *tag, int level,
 555                                struct zfcp_fsf_req *fsf_req,
 556                                fc_id_t s_id, fc_id_t d_id, u8 ls_code,
 557                                void *buffer, int buflen)
 558 {
 559         struct zfcp_adapter *adapter = fsf_req->adapter;
 560         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
 561         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
 562         unsigned long flags;
 563         int offset = 0;
 564
 565         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 566         do {
 567                 memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
 568                 if (offset == 0) {
 569                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 570                         rec->fsf_reqid = (unsigned long)fsf_req;
 571                         rec->fsf_seqno = fsf_req->seq_no;
 572                         rec->s_id = s_id;
 573                         rec->d_id = d_id;
 574                         rec->type.els.ls_code = ls_code;
 575                         buflen = min(buflen, ZFCP_DBF_ELS_MAX_PAYLOAD);
 576                         rec->type.els.payload_size = buflen;
 577                         memcpy(rec->type.els.payload,
 578                                buffer, min(buflen, ZFCP_DBF_ELS_PAYLOAD));
 579                         offset += min(buflen, ZFCP_DBF_ELS_PAYLOAD);
 580                 } else {
 581                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
 582                         dump->total_size = buflen;
 583                         dump->offset = offset;
 584                         dump->size = min(buflen - offset,
 585                                          (int)sizeof(struct zfcp_san_dbf_record)
 586                                          - (int)sizeof(struct zfcp_dbf_dump));
 587                         memcpy(dump->data, buffer + offset, dump->size);
 588                         offset += dump->size;
 589                 }
 590                 debug_event(adapter->san_dbf, level,
 591                             rec, sizeof(struct zfcp_san_dbf_record));
 592         } while (offset < buflen);
 593         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 594 }
 595
 596 inline void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
 597 {
 598         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 599
 600         _zfcp_san_dbf_event_common_els("oels", 2,
 601                                        fsf_req, els->adapter->s_id, els->d_id,
 602                                        *(u8 *) zfcp_sg_to_address(els->req),
 603                                        zfcp_sg_to_address(els->req),
 604                                        els->req->length);
 605 }
 606
 607 inline void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
 608 {
 609         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 610
 611         _zfcp_san_dbf_event_common_els("rels", 2,
 612                                        fsf_req, els->d_id, els->adapter->s_id,
 613                                        *(u8 *) zfcp_sg_to_address(els->req),
 614                                        zfcp_sg_to_address(els->resp),
 615                                        els->resp->length);
 616 }
 617
 618 inline void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
 619 {
 620         struct zfcp_adapter *adapter = fsf_req->adapter;
 621         struct fsf_status_read_buffer *status_buffer =
 622             (struct fsf_status_read_buffer *)fsf_req->data;
 623         int length = (int)status_buffer->length -
 624             (int)((void *)&status_buffer->payload - (void *)status_buffer);
 625
 626         _zfcp_san_dbf_event_common_els("iels", 1,
 627                                        fsf_req, status_buffer->d_id,
 628                                        adapter->s_id,
 629                                        *(u8 *) status_buffer->payload,
 630                                        (void *)status_buffer->payload, length);
 631 }
 632
 633 static int
 634 zfcp_san_dbf_view_format(debug_info_t * id, struct debug_view *view,
 635                          char *out_buf, const char *in_buf)
 636 {
 637         struct zfcp_san_dbf_record *rec = (struct zfcp_san_dbf_record *)in_buf;
 638         char *buffer = NULL;
 639         int buflen = 0, total = 0;
 640         int len = 0;
 641
 642         if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 643                 return 0;
 644
 645         len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
 646         len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
 647                              rec->fsf_reqid);
 648         len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
 649                              rec->fsf_seqno);
 650         len += zfcp_dbf_view(out_buf + len, "s_id", "0x%06x", rec->s_id);
 651         len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x", rec->d_id);
 652
 653         if (strncmp(rec->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 654                 len += zfcp_dbf_view(out_buf + len, "cmd_req_code", "0x%04x",
 655                                      rec->type.ct.type.request.cmd_req_code);
 656                 len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
 657                                      rec->type.ct.type.request.revision);
 658                 len += zfcp_dbf_view(out_buf + len, "gs_type", "0x%02x",
 659                                      rec->type.ct.type.request.gs_type);
 660                 len += zfcp_dbf_view(out_buf + len, "gs_subtype", "0x%02x",
 661                                      rec->type.ct.type.request.gs_subtype);
 662                 len += zfcp_dbf_view(out_buf + len, "options", "0x%02x",
 663                                      rec->type.ct.type.request.options);
 664                 len += zfcp_dbf_view(out_buf + len, "max_res_size", "0x%04x",
 665                                      rec->type.ct.type.request.max_res_size);
 666                 total = rec->type.ct.payload_size;
 667                 buffer = rec->type.ct.payload;
 668                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
 669         } else if (strncmp(rec->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 670                 len += zfcp_dbf_view(out_buf + len, "cmd_rsp_code", "0x%04x",
 671                                      rec->type.ct.type.response.cmd_rsp_code);
 672                 len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
 673                                      rec->type.ct.type.response.revision);
 674                 len += zfcp_dbf_view(out_buf + len, "reason_code", "0x%02x",
 675                                      rec->type.ct.type.response.reason_code);
 676                 len +=
 677                     zfcp_dbf_view(out_buf + len, "reason_code_expl", "0x%02x",
 678                                   rec->type.ct.type.response.reason_code_expl);
 679                 len +=
 680                     zfcp_dbf_view(out_buf + len, "vendor_unique", "0x%02x",
 681                                   rec->type.ct.type.response.vendor_unique);
 682                 total = rec->type.ct.payload_size;
 683                 buffer = rec->type.ct.payload;
 684                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
 685         } else if (strncmp(rec->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
 686                    strncmp(rec->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
 687                    strncmp(rec->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
 688                 len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
 689                                      rec->type.els.ls_code);
 690                 total = rec->type.els.payload_size;
 691                 buffer = rec->type.els.payload;
 692                 buflen = min(total, ZFCP_DBF_ELS_PAYLOAD);
 693         }
 694
 695         len += zfcp_dbf_view_dump(out_buf + len, "payload",
 696                                   buffer, buflen, 0, total);
 697
 698         if (buflen == total)
 699                 len += sprintf(out_buf + len, "\n");
 700
 701         return len;
 702 }
 703
 704 struct debug_view zfcp_san_dbf_view = {
 705         "structured",
 706         NULL,
 707         &zfcp_dbf_view_header,
 708         &zfcp_san_dbf_view_format,
 709         NULL,
 710         NULL
 711 };
 712
 713 static inline void
 714 _zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level,
 715                             struct zfcp_adapter *adapter,
 716                             struct scsi_cmnd *scsi_cmnd,
 717                             struct zfcp_fsf_req *new_fsf_req)
 718 {
 719         struct zfcp_fsf_req *fsf_req =
 720             (struct zfcp_fsf_req *)scsi_cmnd->host_scribble;
 721         struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
 722         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
 723         unsigned long flags;
 724         struct fcp_rsp_iu *fcp_rsp;
 725         char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
 726         int offset = 0, buflen = 0;
 727
 728         spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
 729         do {
 730                 memset(rec, 0, sizeof(struct zfcp_scsi_dbf_record));
 731                 if (offset == 0) {
 732                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 733                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
 734                         if (scsi_cmnd->device) {
 735                                 rec->scsi_id = scsi_cmnd->device->id;
 736                                 rec->scsi_lun = scsi_cmnd->device->lun;
 737                         }
 738                         rec->scsi_result = scsi_cmnd->result;
 739                         rec->scsi_cmnd = (unsigned long)scsi_cmnd;
 740                         rec->scsi_serial = scsi_cmnd->serial_number;
 741                         memcpy(rec->scsi_opcode,
 742                                &scsi_cmnd->cmnd,
 743                                min((int)scsi_cmnd->cmd_len,
 744                                    ZFCP_DBF_SCSI_OPCODE));
 745                         rec->scsi_retries = scsi_cmnd->retries;
 746                         rec->scsi_allowed = scsi_cmnd->allowed;
 747                         if (fsf_req != NULL) {
 748                                 fcp_rsp = (struct fcp_rsp_iu *)
 749                                     &(fsf_req->qtcb->bottom.io.fcp_rsp);
 750                                 fcp_rsp_info =
 751                                     zfcp_get_fcp_rsp_info_ptr(fcp_rsp);
 752                                 fcp_sns_info =
 753                                     zfcp_get_fcp_sns_info_ptr(fcp_rsp);
 754
 755                                 rec->type.fcp.rsp_validity =
 756                                     fcp_rsp->validity.value;
 757                                 rec->type.fcp.rsp_scsi_status =
 758                                     fcp_rsp->scsi_status;
 759                                 rec->type.fcp.rsp_resid = fcp_rsp->fcp_resid;
 760                                 if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
 761                                         rec->type.fcp.rsp_code =
 762                                             *(fcp_rsp_info + 3);
 763                                 if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
 764                                         buflen = min((int)fcp_rsp->fcp_sns_len,
 765                                                      ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
 766                                         rec->type.fcp.sns_info_len = buflen;
 767                                         memcpy(rec->type.fcp.sns_info,
 768                                                fcp_sns_info,
 769                                                min(buflen,
 770                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
 771                                         offset += min(buflen,
 772                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
 773                                 }
 774
 775                                 rec->fsf_reqid = (unsigned long)fsf_req;
 776                                 rec->fsf_seqno = fsf_req->seq_no;
 777                                 rec->fsf_issued = fsf_req->issued;
 778                         }
 779                         if (new_fsf_req != NULL) {
 780                                 rec->type.new_fsf_req.fsf_reqid =
 781                                     (unsigned long)
 782                                     new_fsf_req;
 783                                 rec->type.new_fsf_req.fsf_seqno =
 784                                     new_fsf_req->seq_no;
 785                                 rec->type.new_fsf_req.fsf_issued =
 786                                     new_fsf_req->issued;
 787                         }
 788                 } else {
 789                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
 790                         dump->total_size = buflen;
 791                         dump->offset = offset;
 792                         dump->size = min(buflen - offset,
 793                                          (int)sizeof(struct
 794                                                      zfcp_scsi_dbf_record) -
 795                                          (int)sizeof(struct zfcp_dbf_dump));
 796                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
 797                         offset += dump->size;
 798                 }
 799                 debug_event(adapter->scsi_dbf, level,
 800                             rec, sizeof(struct zfcp_scsi_dbf_record));
 801         } while (offset < buflen);
 802         spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
 803 }
 804
 805 inline void
 806 zfcp_scsi_dbf_event_result(const char *tag, int level,
 807                            struct zfcp_adapter *adapter,
 808                            struct scsi_cmnd *scsi_cmnd)
 809 {
 810         _zfcp_scsi_dbf_event_common("rslt",
 811                                     tag, level, adapter, scsi_cmnd, NULL);
 812 }
 813
 814 inline void
 815 zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
 816                           struct scsi_cmnd *scsi_cmnd,
 817                           struct zfcp_fsf_req *new_fsf_req)
 818 {
 819         _zfcp_scsi_dbf_event_common("abrt",
 820                                     tag, 1, adapter, scsi_cmnd, new_fsf_req);
 821 }
 822
 823 inline void
 824 zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag, struct zfcp_unit *unit,
 825                              struct scsi_cmnd *scsi_cmnd)
 826 {
 827         struct zfcp_adapter *adapter = unit->port->adapter;
 828
 829         _zfcp_scsi_dbf_event_common(flag == FCP_TARGET_RESET ? "trst" : "lrst",
 830                                     tag, 1, adapter, scsi_cmnd, NULL);
 831 }
 832
 833 static int
 834 zfcp_scsi_dbf_view_format(debug_info_t * id, struct debug_view *view,
 835                           char *out_buf, const char *in_buf)
 836 {
 837         struct zfcp_scsi_dbf_record *rec =
 838             (struct zfcp_scsi_dbf_record *)in_buf;
 839         int len = 0;
 840
 841         if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 842                 return 0;
 843
 844         len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
 845         len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
 846         len += zfcp_dbf_view(out_buf + len, "scsi_id", "0x%08x", rec->scsi_id);
 847         len += zfcp_dbf_view(out_buf + len, "scsi_lun", "0x%08x",
 848                              rec->scsi_lun);
 849         len += zfcp_dbf_view(out_buf + len, "scsi_result", "0x%08x",
 850                              rec->scsi_result);
 851         len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
 852                              rec->scsi_cmnd);
 853         len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
 854                              rec->scsi_serial);
 855         len += zfcp_dbf_view_dump(out_buf + len, "scsi_opcode",
 856                                   rec->scsi_opcode,
 857                                   ZFCP_DBF_SCSI_OPCODE,
 858                                   0, ZFCP_DBF_SCSI_OPCODE);
 859         len += zfcp_dbf_view(out_buf + len, "scsi_retries", "0x%02x",
 860                              rec->scsi_retries);
 861         len += zfcp_dbf_view(out_buf + len, "scsi_allowed", "0x%02x",
 862                              rec->scsi_allowed);
 863         len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
 864                              rec->fsf_reqid);
 865         len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
 866                              rec->fsf_seqno);
 867         len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
 868         if (strncmp(rec->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
 869                 len +=
 870                     zfcp_dbf_view(out_buf + len, "fcp_rsp_validity", "0x%02x",
 871                                   rec->type.fcp.rsp_validity);
 872                 len +=
 873                     zfcp_dbf_view(out_buf + len, "fcp_rsp_scsi_status",
 874                                   "0x%02x", rec->type.fcp.rsp_scsi_status);
 875                 len +=
 876                     zfcp_dbf_view(out_buf + len, "fcp_rsp_resid", "0x%08x",
 877                                   rec->type.fcp.rsp_resid);
 878                 len +=
 879                     zfcp_dbf_view(out_buf + len, "fcp_rsp_code", "0x%08x",
 880                                   rec->type.fcp.rsp_code);
 881                 len +=
 882                     zfcp_dbf_view(out_buf + len, "fcp_sns_info_len", "0x%08x",
 883                                   rec->type.fcp.sns_info_len);
 884                 len +=
 885                     zfcp_dbf_view_dump(out_buf + len, "fcp_sns_info",
 886                                        rec->type.fcp.sns_info,
 887                                        min((int)rec->type.fcp.sns_info_len,
 888                                            ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
 889                                        rec->type.fcp.sns_info_len);
 890         } else if (strncmp(rec->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0) {
 891                 len += zfcp_dbf_view(out_buf + len, "fsf_reqid_abort", "0x%0Lx",
 892                                      rec->type.new_fsf_req.fsf_reqid);
 893                 len += zfcp_dbf_view(out_buf + len, "fsf_seqno_abort", "0x%08x",
 894                                      rec->type.new_fsf_req.fsf_seqno);
 895                 len += zfcp_dbf_stck(out_buf + len, "fsf_issued",
 896                                      rec->type.new_fsf_req.fsf_issued);
 897         } else if ((strncmp(rec->tag, "trst", ZFCP_DBF_TAG_SIZE) == 0) ||
 898                    (strncmp(rec->tag, "lrst", ZFCP_DBF_TAG_SIZE) == 0)) {
 899                 len += zfcp_dbf_view(out_buf + len, "fsf_reqid_reset", "0x%0Lx",
 900                                      rec->type.new_fsf_req.fsf_reqid);
 901                 len += zfcp_dbf_view(out_buf + len, "fsf_seqno_reset", "0x%08x",
 902                                      rec->type.new_fsf_req.fsf_seqno);
 903                 len += zfcp_dbf_stck(out_buf + len, "fsf_issued",
 904                                      rec->type.new_fsf_req.fsf_issued);
 905         }
 906
 907         len += sprintf(out_buf + len, "\n");
 908
 909         return len;
 910 }
 911
 912 struct debug_view zfcp_scsi_dbf_view = {
 913         "structured",
 914         NULL,
 915         &zfcp_dbf_view_header,
 916         &zfcp_scsi_dbf_view_format,
 917         NULL,
 918         NULL
 919 };
 920
 921 /**
 922  * zfcp_adapter_debug_register - registers debug feature for an adapter
 923  * @adapter: pointer to adapter for which debug features should be registered
 924  * return: -ENOMEM on error, 0 otherwise
 925  */
 926 int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
 927 {
 928         char dbf_name[DEBUG_MAX_NAME_LEN];
 929
 930         /* debug feature area which records recovery activity */
 931         spin_lock_init(&adapter->erp_dbf_lock);
 932         sprintf(dbf_name, "zfcp_%s_erp", zfcp_get_busid_by_adapter(adapter));
 933         adapter->erp_dbf = debug_register(dbf_name, dbfsize, 2,
 934                                           sizeof(struct zfcp_erp_dbf_record));
 935         if (!adapter->erp_dbf)
 936                 goto failed;
 937         debug_register_view(adapter->erp_dbf, &debug_hex_ascii_view);
 938         debug_set_level(adapter->erp_dbf, 3);
 939
 940         /* debug feature area which records HBA (FSF and QDIO) conditions */
 941         spin_lock_init(&adapter->hba_dbf_lock);
 942         sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter));
 943         adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
 944                                           sizeof(struct zfcp_hba_dbf_record));
 945         if (!adapter->hba_dbf)
 946                 goto failed;
 947         debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
 948         debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
 949         debug_set_level(adapter->hba_dbf, 3);
 950
 951         /* debug feature area which records SAN command failures and recovery */
 952         spin_lock_init(&adapter->san_dbf_lock);
 953         sprintf(dbf_name, "zfcp_%s_san", zfcp_get_busid_by_adapter(adapter));
 954         adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
 955                                           sizeof(struct zfcp_san_dbf_record));
 956         if (!adapter->san_dbf)
 957                 goto failed;
 958         debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
 959         debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
 960         debug_set_level(adapter->san_dbf, 6);
 961
 962         /* debug feature area which records SCSI command failures and recovery */
 963         spin_lock_init(&adapter->scsi_dbf_lock);
 964         sprintf(dbf_name, "zfcp_%s_scsi", zfcp_get_busid_by_adapter(adapter));
 965         adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
 966                                            sizeof(struct zfcp_scsi_dbf_record));
 967         if (!adapter->scsi_dbf)
 968                 goto failed;
 969         debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
 970         debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
 971         debug_set_level(adapter->scsi_dbf, 3);
 972
 973         return 0;
 974
 975  failed:
 976         zfcp_adapter_debug_unregister(adapter);
 977
 978         return -ENOMEM;
 979 }
 980
 981 /**
 982  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
 983  * @adapter: pointer to adapter for which debug features should be unregistered
 984  */
 985 void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
 986 {
 987         debug_unregister(adapter->scsi_dbf);
 988         debug_unregister(adapter->san_dbf);
 989         debug_unregister(adapter->hba_dbf);
 990         debug_unregister(adapter->erp_dbf);
 991         adapter->scsi_dbf = NULL;
 992         adapter->san_dbf = NULL;
 993         adapter->hba_dbf = NULL;
 994         adapter->erp_dbf = NULL;
 995 }
 996
 997 #undef ZFCP_LOG_AREA