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                               u32 s_id, u32 d_id, void *buffer, int buflen)
 490 {
 491         struct zfcp_send_ct *send_ct = (struct zfcp_send_ct *)fsf_req->data;
 492         struct zfcp_port *port = send_ct->port;
 493         struct zfcp_adapter *adapter = port->adapter;
 494         struct ct_hdr *header = (struct ct_hdr *)buffer;
 495         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
 496         struct zfcp_san_dbf_record_ct *ct = &rec->type.ct;
 497         unsigned long flags;
 498
 499         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 500         memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
 501         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 502         rec->fsf_reqid = (unsigned long)fsf_req;
 503         rec->fsf_seqno = fsf_req->seq_no;
 504         rec->s_id = s_id;
 505         rec->d_id = d_id;
 506         if (strncmp(tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 507                 ct->type.request.cmd_req_code = header->cmd_rsp_code;
 508                 ct->type.request.revision = header->revision;
 509                 ct->type.request.gs_type = header->gs_type;
 510                 ct->type.request.gs_subtype = header->gs_subtype;
 511                 ct->type.request.options = header->options;
 512                 ct->type.request.max_res_size = header->max_res_size;
 513         } else if (strncmp(tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 514                 ct->type.response.cmd_rsp_code = header->cmd_rsp_code;
 515                 ct->type.response.revision = header->revision;
 516                 ct->type.response.reason_code = header->reason_code;
 517                 ct->type.response.reason_code_expl = header->reason_code_expl;
 518                 ct->type.response.vendor_unique = header->vendor_unique;
 519         }
 520         ct->payload_size =
 521             min(buflen - (int)sizeof(struct ct_hdr), ZFCP_DBF_CT_PAYLOAD);
 522         memcpy(ct->payload, buffer + sizeof(struct ct_hdr), ct->payload_size);
 523         debug_event(adapter->san_dbf, 3,
 524                     rec, sizeof(struct zfcp_san_dbf_record));
 525         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 526 }
 527
 528 inline void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
 529 {
 530         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 531         struct zfcp_port *port = ct->port;
 532         struct zfcp_adapter *adapter = port->adapter;
 533
 534         _zfcp_san_dbf_event_common_ct("octc", fsf_req,
 535                                       fc_host_port_id(adapter->scsi_host),
 536                                       port->d_id, zfcp_sg_to_address(ct->req),
 537                                       ct->req->length);
 538 }
 539
 540 inline void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
 541 {
 542         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 543         struct zfcp_port *port = ct->port;
 544         struct zfcp_adapter *adapter = port->adapter;
 545
 546         _zfcp_san_dbf_event_common_ct("rctc", fsf_req, port->d_id,
 547                                       fc_host_port_id(adapter->scsi_host),
 548                                       zfcp_sg_to_address(ct->resp),
 549                                       ct->resp->length);
 550 }
 551
 552 static inline void
 553 _zfcp_san_dbf_event_common_els(const char *tag, int level,
 554                                struct zfcp_fsf_req *fsf_req, u32 s_id,
 555                                u32 d_id, u8 ls_code, void *buffer, int buflen)
 556 {
 557         struct zfcp_adapter *adapter = fsf_req->adapter;
 558         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
 559         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
 560         unsigned long flags;
 561         int offset = 0;
 562
 563         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 564         do {
 565                 memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
 566                 if (offset == 0) {
 567                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 568                         rec->fsf_reqid = (unsigned long)fsf_req;
 569                         rec->fsf_seqno = fsf_req->seq_no;
 570                         rec->s_id = s_id;
 571                         rec->d_id = d_id;
 572                         rec->type.els.ls_code = ls_code;
 573                         buflen = min(buflen, ZFCP_DBF_ELS_MAX_PAYLOAD);
 574                         rec->type.els.payload_size = buflen;
 575                         memcpy(rec->type.els.payload,
 576                                buffer, min(buflen, ZFCP_DBF_ELS_PAYLOAD));
 577                         offset += min(buflen, ZFCP_DBF_ELS_PAYLOAD);
 578                 } else {
 579                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
 580                         dump->total_size = buflen;
 581                         dump->offset = offset;
 582                         dump->size = min(buflen - offset,
 583                                          (int)sizeof(struct zfcp_san_dbf_record)
 584                                          - (int)sizeof(struct zfcp_dbf_dump));
 585                         memcpy(dump->data, buffer + offset, dump->size);
 586                         offset += dump->size;
 587                 }
 588                 debug_event(adapter->san_dbf, level,
 589                             rec, sizeof(struct zfcp_san_dbf_record));
 590         } while (offset < buflen);
 591         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 592 }
 593
 594 inline void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
 595 {
 596         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 597
 598         _zfcp_san_dbf_event_common_els("oels", 2, fsf_req,
 599                                        fc_host_port_id(els->adapter->scsi_host),
 600                                        els->d_id,
 601                                        *(u8 *) zfcp_sg_to_address(els->req),
 602                                        zfcp_sg_to_address(els->req),
 603                                        els->req->length);
 604 }
 605
 606 inline void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
 607 {
 608         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 609
 610         _zfcp_san_dbf_event_common_els("rels", 2, fsf_req, els->d_id,
 611                                        fc_host_port_id(els->adapter->scsi_host),
 612                                        *(u8 *) zfcp_sg_to_address(els->req),
 613                                        zfcp_sg_to_address(els->resp),
 614                                        els->resp->length);
 615 }
 616
 617 inline void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
 618 {
 619         struct zfcp_adapter *adapter = fsf_req->adapter;
 620         struct fsf_status_read_buffer *status_buffer =
 621             (struct fsf_status_read_buffer *)fsf_req->data;
 622         int length = (int)status_buffer->length -
 623             (int)((void *)&status_buffer->payload - (void *)status_buffer);
 624
 625         _zfcp_san_dbf_event_common_els("iels", 1, fsf_req, status_buffer->d_id,
 626                                        fc_host_port_id(adapter->scsi_host),
 627                                        *(u8 *) status_buffer->payload,
 628                                        (void *)status_buffer->payload, length);
 629 }
 630
 631 static int
 632 zfcp_san_dbf_view_format(debug_info_t * id, struct debug_view *view,
 633                          char *out_buf, const char *in_buf)
 634 {
 635         struct zfcp_san_dbf_record *rec = (struct zfcp_san_dbf_record *)in_buf;
 636         char *buffer = NULL;
 637         int buflen = 0, total = 0;
 638         int len = 0;
 639
 640         if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 641                 return 0;
 642
 643         len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
 644         len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
 645                              rec->fsf_reqid);
 646         len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
 647                              rec->fsf_seqno);
 648         len += zfcp_dbf_view(out_buf + len, "s_id", "0x%06x", rec->s_id);
 649         len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x", rec->d_id);
 650
 651         if (strncmp(rec->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 652                 len += zfcp_dbf_view(out_buf + len, "cmd_req_code", "0x%04x",
 653                                      rec->type.ct.type.request.cmd_req_code);
 654                 len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
 655                                      rec->type.ct.type.request.revision);
 656                 len += zfcp_dbf_view(out_buf + len, "gs_type", "0x%02x",
 657                                      rec->type.ct.type.request.gs_type);
 658                 len += zfcp_dbf_view(out_buf + len, "gs_subtype", "0x%02x",
 659                                      rec->type.ct.type.request.gs_subtype);
 660                 len += zfcp_dbf_view(out_buf + len, "options", "0x%02x",
 661                                      rec->type.ct.type.request.options);
 662                 len += zfcp_dbf_view(out_buf + len, "max_res_size", "0x%04x",
 663                                      rec->type.ct.type.request.max_res_size);
 664                 total = rec->type.ct.payload_size;
 665                 buffer = rec->type.ct.payload;
 666                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
 667         } else if (strncmp(rec->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 668                 len += zfcp_dbf_view(out_buf + len, "cmd_rsp_code", "0x%04x",
 669                                      rec->type.ct.type.response.cmd_rsp_code);
 670                 len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
 671                                      rec->type.ct.type.response.revision);
 672                 len += zfcp_dbf_view(out_buf + len, "reason_code", "0x%02x",
 673                                      rec->type.ct.type.response.reason_code);
 674                 len +=
 675                     zfcp_dbf_view(out_buf + len, "reason_code_expl", "0x%02x",
 676                                   rec->type.ct.type.response.reason_code_expl);
 677                 len +=
 678                     zfcp_dbf_view(out_buf + len, "vendor_unique", "0x%02x",
 679                                   rec->type.ct.type.response.vendor_unique);
 680                 total = rec->type.ct.payload_size;
 681                 buffer = rec->type.ct.payload;
 682                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
 683         } else if (strncmp(rec->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
 684                    strncmp(rec->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
 685                    strncmp(rec->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
 686                 len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
 687                                      rec->type.els.ls_code);
 688                 total = rec->type.els.payload_size;
 689                 buffer = rec->type.els.payload;
 690                 buflen = min(total, ZFCP_DBF_ELS_PAYLOAD);
 691         }
 692
 693         len += zfcp_dbf_view_dump(out_buf + len, "payload",
 694                                   buffer, buflen, 0, total);
 695
 696         if (buflen == total)
 697                 len += sprintf(out_buf + len, "\n");
 698
 699         return len;
 700 }
 701
 702 struct debug_view zfcp_san_dbf_view = {
 703         "structured",
 704         NULL,
 705         &zfcp_dbf_view_header,
 706         &zfcp_san_dbf_view_format,
 707         NULL,
 708         NULL
 709 };
 710
 711 static inline void
 712 _zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level,
 713                             struct zfcp_adapter *adapter,
 714                             struct scsi_cmnd *scsi_cmnd,
 715                             struct zfcp_fsf_req *new_fsf_req)
 716 {
 717         struct zfcp_fsf_req *fsf_req =
 718             (struct zfcp_fsf_req *)scsi_cmnd->host_scribble;
 719         struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
 720         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
 721         unsigned long flags;
 722         struct fcp_rsp_iu *fcp_rsp;
 723         char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
 724         int offset = 0, buflen = 0;
 725
 726         spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
 727         do {
 728                 memset(rec, 0, sizeof(struct zfcp_scsi_dbf_record));
 729                 if (offset == 0) {
 730                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 731                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
 732                         if (scsi_cmnd->device) {
 733                                 rec->scsi_id = scsi_cmnd->device->id;
 734                                 rec->scsi_lun = scsi_cmnd->device->lun;
 735                         }
 736                         rec->scsi_result = scsi_cmnd->result;
 737                         rec->scsi_cmnd = (unsigned long)scsi_cmnd;
 738                         rec->scsi_serial = scsi_cmnd->serial_number;
 739                         memcpy(rec->scsi_opcode,
 740                                &scsi_cmnd->cmnd,
 741                                min((int)scsi_cmnd->cmd_len,
 742                                    ZFCP_DBF_SCSI_OPCODE));
 743                         rec->scsi_retries = scsi_cmnd->retries;
 744                         rec->scsi_allowed = scsi_cmnd->allowed;
 745                         if (fsf_req != NULL) {
 746                                 fcp_rsp = (struct fcp_rsp_iu *)
 747                                     &(fsf_req->qtcb->bottom.io.fcp_rsp);
 748                                 fcp_rsp_info =
 749                                     zfcp_get_fcp_rsp_info_ptr(fcp_rsp);
 750                                 fcp_sns_info =
 751                                     zfcp_get_fcp_sns_info_ptr(fcp_rsp);
 752
 753                                 rec->type.fcp.rsp_validity =
 754                                     fcp_rsp->validity.value;
 755                                 rec->type.fcp.rsp_scsi_status =
 756                                     fcp_rsp->scsi_status;
 757                                 rec->type.fcp.rsp_resid = fcp_rsp->fcp_resid;
 758                                 if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
 759                                         rec->type.fcp.rsp_code =
 760                                             *(fcp_rsp_info + 3);
 761                                 if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
 762                                         buflen = min((int)fcp_rsp->fcp_sns_len,
 763                                                      ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
 764                                         rec->type.fcp.sns_info_len = buflen;
 765                                         memcpy(rec->type.fcp.sns_info,
 766                                                fcp_sns_info,
 767                                                min(buflen,
 768                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
 769                                         offset += min(buflen,
 770                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
 771                                 }
 772
 773                                 rec->fsf_reqid = (unsigned long)fsf_req;
 774                                 rec->fsf_seqno = fsf_req->seq_no;
 775                                 rec->fsf_issued = fsf_req->issued;
 776                         }
 777                         if (new_fsf_req != NULL) {
 778                                 rec->type.new_fsf_req.fsf_reqid =
 779                                     (unsigned long)
 780                                     new_fsf_req;
 781                                 rec->type.new_fsf_req.fsf_seqno =
 782                                     new_fsf_req->seq_no;
 783                                 rec->type.new_fsf_req.fsf_issued =
 784                                     new_fsf_req->issued;
 785                         }
 786                 } else {
 787                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
 788                         dump->total_size = buflen;
 789                         dump->offset = offset;
 790                         dump->size = min(buflen - offset,
 791                                          (int)sizeof(struct
 792                                                      zfcp_scsi_dbf_record) -
 793                                          (int)sizeof(struct zfcp_dbf_dump));
 794                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
 795                         offset += dump->size;
 796                 }
 797                 debug_event(adapter->scsi_dbf, level,
 798                             rec, sizeof(struct zfcp_scsi_dbf_record));
 799         } while (offset < buflen);
 800         spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
 801 }
 802
 803 inline void
 804 zfcp_scsi_dbf_event_result(const char *tag, int level,
 805                            struct zfcp_adapter *adapter,
 806                            struct scsi_cmnd *scsi_cmnd)
 807 {
 808         _zfcp_scsi_dbf_event_common("rslt",
 809                                     tag, level, adapter, scsi_cmnd, NULL);
 810 }
 811
 812 inline void
 813 zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
 814                           struct scsi_cmnd *scsi_cmnd,
 815                           struct zfcp_fsf_req *new_fsf_req)
 816 {
 817         _zfcp_scsi_dbf_event_common("abrt",
 818                                     tag, 1, adapter, scsi_cmnd, new_fsf_req);
 819 }
 820
 821 inline void
 822 zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag, struct zfcp_unit *unit,
 823                              struct scsi_cmnd *scsi_cmnd)
 824 {
 825         struct zfcp_adapter *adapter = unit->port->adapter;
 826
 827         _zfcp_scsi_dbf_event_common(flag == FCP_TARGET_RESET ? "trst" : "lrst",
 828                                     tag, 1, adapter, scsi_cmnd, NULL);
 829 }
 830
 831 static int
 832 zfcp_scsi_dbf_view_format(debug_info_t * id, struct debug_view *view,
 833                           char *out_buf, const char *in_buf)
 834 {
 835         struct zfcp_scsi_dbf_record *rec =
 836             (struct zfcp_scsi_dbf_record *)in_buf;
 837         int len = 0;
 838
 839         if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 840                 return 0;
 841
 842         len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
 843         len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
 844         len += zfcp_dbf_view(out_buf + len, "scsi_id", "0x%08x", rec->scsi_id);
 845         len += zfcp_dbf_view(out_buf + len, "scsi_lun", "0x%08x",
 846                              rec->scsi_lun);
 847         len += zfcp_dbf_view(out_buf + len, "scsi_result", "0x%08x",
 848                              rec->scsi_result);
 849         len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
 850                              rec->scsi_cmnd);
 851         len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
 852                              rec->scsi_serial);
 853         len += zfcp_dbf_view_dump(out_buf + len, "scsi_opcode",
 854                                   rec->scsi_opcode,
 855                                   ZFCP_DBF_SCSI_OPCODE,
 856                                   0, ZFCP_DBF_SCSI_OPCODE);
 857         len += zfcp_dbf_view(out_buf + len, "scsi_retries", "0x%02x",
 858                              rec->scsi_retries);
 859         len += zfcp_dbf_view(out_buf + len, "scsi_allowed", "0x%02x",
 860                              rec->scsi_allowed);
 861         len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
 862                              rec->fsf_reqid);
 863         len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
 864                              rec->fsf_seqno);
 865         len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
 866         if (strncmp(rec->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
 867                 len +=
 868                     zfcp_dbf_view(out_buf + len, "fcp_rsp_validity", "0x%02x",
 869                                   rec->type.fcp.rsp_validity);
 870                 len +=
 871                     zfcp_dbf_view(out_buf + len, "fcp_rsp_scsi_status",
 872                                   "0x%02x", rec->type.fcp.rsp_scsi_status);
 873                 len +=
 874                     zfcp_dbf_view(out_buf + len, "fcp_rsp_resid", "0x%08x",
 875                                   rec->type.fcp.rsp_resid);
 876                 len +=
 877                     zfcp_dbf_view(out_buf + len, "fcp_rsp_code", "0x%08x",
 878                                   rec->type.fcp.rsp_code);
 879                 len +=
 880                     zfcp_dbf_view(out_buf + len, "fcp_sns_info_len", "0x%08x",
 881                                   rec->type.fcp.sns_info_len);
 882                 len +=
 883                     zfcp_dbf_view_dump(out_buf + len, "fcp_sns_info",
 884                                        rec->type.fcp.sns_info,
 885                                        min((int)rec->type.fcp.sns_info_len,
 886                                            ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
 887                                        rec->type.fcp.sns_info_len);
 888         } else if (strncmp(rec->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0) {
 889                 len += zfcp_dbf_view(out_buf + len, "fsf_reqid_abort", "0x%0Lx",
 890                                      rec->type.new_fsf_req.fsf_reqid);
 891                 len += zfcp_dbf_view(out_buf + len, "fsf_seqno_abort", "0x%08x",
 892                                      rec->type.new_fsf_req.fsf_seqno);
 893                 len += zfcp_dbf_stck(out_buf + len, "fsf_issued",
 894                                      rec->type.new_fsf_req.fsf_issued);
 895         } else if ((strncmp(rec->tag, "trst", ZFCP_DBF_TAG_SIZE) == 0) ||
 896                    (strncmp(rec->tag, "lrst", ZFCP_DBF_TAG_SIZE) == 0)) {
 897                 len += zfcp_dbf_view(out_buf + len, "fsf_reqid_reset", "0x%0Lx",
 898                                      rec->type.new_fsf_req.fsf_reqid);
 899                 len += zfcp_dbf_view(out_buf + len, "fsf_seqno_reset", "0x%08x",
 900                                      rec->type.new_fsf_req.fsf_seqno);
 901                 len += zfcp_dbf_stck(out_buf + len, "fsf_issued",
 902                                      rec->type.new_fsf_req.fsf_issued);
 903         }
 904
 905         len += sprintf(out_buf + len, "\n");
 906
 907         return len;
 908 }
 909
 910 struct debug_view zfcp_scsi_dbf_view = {
 911         "structured",
 912         NULL,
 913         &zfcp_dbf_view_header,
 914         &zfcp_scsi_dbf_view_format,
 915         NULL,
 916         NULL
 917 };
 918
 919 /**
 920  * zfcp_adapter_debug_register - registers debug feature for an adapter
 921  * @adapter: pointer to adapter for which debug features should be registered
 922  * return: -ENOMEM on error, 0 otherwise
 923  */
 924 int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
 925 {
 926         char dbf_name[DEBUG_MAX_NAME_LEN];
 927
 928         /* debug feature area which records recovery activity */
 929         spin_lock_init(&adapter->erp_dbf_lock);
 930         sprintf(dbf_name, "zfcp_%s_erp", zfcp_get_busid_by_adapter(adapter));
 931         adapter->erp_dbf = debug_register(dbf_name, dbfsize, 2,
 932                                           sizeof(struct zfcp_erp_dbf_record));
 933         if (!adapter->erp_dbf)
 934                 goto failed;
 935         debug_register_view(adapter->erp_dbf, &debug_hex_ascii_view);
 936         debug_set_level(adapter->erp_dbf, 3);
 937
 938         /* debug feature area which records HBA (FSF and QDIO) conditions */
 939         spin_lock_init(&adapter->hba_dbf_lock);
 940         sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter));
 941         adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
 942                                           sizeof(struct zfcp_hba_dbf_record));
 943         if (!adapter->hba_dbf)
 944                 goto failed;
 945         debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
 946         debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
 947         debug_set_level(adapter->hba_dbf, 3);
 948
 949         /* debug feature area which records SAN command failures and recovery */
 950         spin_lock_init(&adapter->san_dbf_lock);
 951         sprintf(dbf_name, "zfcp_%s_san", zfcp_get_busid_by_adapter(adapter));
 952         adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
 953                                           sizeof(struct zfcp_san_dbf_record));
 954         if (!adapter->san_dbf)
 955                 goto failed;
 956         debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
 957         debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
 958         debug_set_level(adapter->san_dbf, 6);
 959
 960         /* debug feature area which records SCSI command failures and recovery */
 961         spin_lock_init(&adapter->scsi_dbf_lock);
 962         sprintf(dbf_name, "zfcp_%s_scsi", zfcp_get_busid_by_adapter(adapter));
 963         adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
 964                                            sizeof(struct zfcp_scsi_dbf_record));
 965         if (!adapter->scsi_dbf)
 966                 goto failed;
 967         debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
 968         debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
 969         debug_set_level(adapter->scsi_dbf, 3);
 970
 971         return 0;
 972
 973  failed:
 974         zfcp_adapter_debug_unregister(adapter);
 975
 976         return -ENOMEM;
 977 }
 978
 979 /**
 980  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
 981  * @adapter: pointer to adapter for which debug features should be unregistered
 982  */
 983 void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
 984 {
 985         debug_unregister(adapter->scsi_dbf);
 986         debug_unregister(adapter->san_dbf);
 987         debug_unregister(adapter->hba_dbf);
 988         debug_unregister(adapter->erp_dbf);
 989         adapter->scsi_dbf = NULL;
 990         adapter->san_dbf = NULL;
 991         adapter->hba_dbf = NULL;
 992         adapter->erp_dbf = NULL;
 993 }
 994
 995 #undef ZFCP_LOG_AREA