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

   1 /*
   2  * This file is part of the zfcp device driver for
   3  * FCP adapters for IBM System z9 and zSeries.
   4  *
   5  * (C) Copyright IBM Corp. 2002, 2006
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include <linux/ctype.h>
  23 #include <asm/debug.h>
  24 #include "zfcp_ext.h"
  25
  26 static u32 dbfsize = 4;
  27
  28 module_param(dbfsize, uint, 0400);
  29 MODULE_PARM_DESC(dbfsize,
  30                  "number of pages for each debug feature area (default 4)");
  31
  32 #define ZFCP_LOG_AREA                   ZFCP_LOG_AREA_OTHER
  33
  34 static void zfcp_dbf_hexdump(debug_info_t *dbf, void *to, int to_len,
  35                              int level, char *from, int from_len)
  36 {
  37         int offset;
  38         struct zfcp_dbf_dump *dump = to;
  39         int room = to_len - sizeof(*dump);
  40
  41         for (offset = 0; offset < from_len; offset += dump->size) {
  42                 memset(to, 0, to_len);
  43                 strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
  44                 dump->total_size = from_len;
  45                 dump->offset = offset;
  46                 dump->size = min(from_len - offset, room);
  47                 memcpy(dump->data, from + offset, dump->size);
  48                 debug_event(dbf, level, dump, dump->size);
  49         }
  50 }
  51
  52 static int
  53 zfcp_dbf_stck(char *out_buf, const char *label, unsigned long long stck)
  54 {
  55         unsigned long long sec;
  56         struct timespec dbftime;
  57         int len = 0;
  58
  59         stck -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
  60         sec = stck >> 12;
  61         do_div(sec, 1000000);
  62         dbftime.tv_sec = sec;
  63         stck -= (sec * 1000000) << 12;
  64         dbftime.tv_nsec = ((stck * 1000) >> 12);
  65         len += sprintf(out_buf + len, "%-24s%011lu:%06lu\n",
  66                        label, dbftime.tv_sec, dbftime.tv_nsec);
  67
  68         return len;
  69 }
  70
  71 static int zfcp_dbf_tag(char *out_buf, const char *label, const char *tag)
  72 {
  73         int len = 0, i;
  74
  75         len += sprintf(out_buf + len, "%-24s", label);
  76         for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
  77                 len += sprintf(out_buf + len, "%c", tag[i]);
  78         len += sprintf(out_buf + len, "\n");
  79
  80         return len;
  81 }
  82
  83 static int
  84 zfcp_dbf_view(char *out_buf, const char *label, const char *format, ...)
  85 {
  86         va_list arg;
  87         int len = 0;
  88
  89         len += sprintf(out_buf + len, "%-24s", label);
  90         va_start(arg, format);
  91         len += vsprintf(out_buf + len, format, arg);
  92         va_end(arg);
  93         len += sprintf(out_buf + len, "\n");
  94
  95         return len;
  96 }
  97
  98 static void zfcp_dbf_outs(char **buf, const char *s1, const char *s2)
  99 {
 100         *buf += sprintf(*buf, "%-24s%s\n", s1, s2);
 101 }
 102
 103 static void zfcp_dbf_out(char **buf, const char *s, const char *format, ...)
 104 {
 105         va_list arg;
 106
 107         *buf += sprintf(*buf, "%-24s", s);
 108         va_start(arg, format);
 109         *buf += vsprintf(*buf, format, arg);
 110         va_end(arg);
 111         *buf += sprintf(*buf, "\n");
 112 }
 113
 114 static int
 115 zfcp_dbf_view_dump(char *out_buf, const char *label,
 116                    char *buffer, int buflen, int offset, int total_size)
 117 {
 118         int len = 0;
 119
 120         if (offset == 0)
 121                 len += sprintf(out_buf + len, "%-24s  ", label);
 122
 123         while (buflen--) {
 124                 if (offset > 0) {
 125                         if ((offset % 32) == 0)
 126                                 len += sprintf(out_buf + len, "\n%-24c  ", ' ');
 127                         else if ((offset % 4) == 0)
 128                                 len += sprintf(out_buf + len, " ");
 129                 }
 130                 len += sprintf(out_buf + len, "%02x", *buffer++);
 131                 if (++offset == total_size) {
 132                         len += sprintf(out_buf + len, "\n");
 133                         break;
 134                 }
 135         }
 136
 137         if (total_size == 0)
 138                 len += sprintf(out_buf + len, "\n");
 139
 140         return len;
 141 }
 142
 143 static int
 144 zfcp_dbf_view_header(debug_info_t * id, struct debug_view *view, int area,
 145                      debug_entry_t * entry, char *out_buf)
 146 {
 147         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
 148         int len = 0;
 149
 150         if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
 151                 len += zfcp_dbf_stck(out_buf + len, "timestamp",
 152                                      entry->id.stck);
 153                 len += zfcp_dbf_view(out_buf + len, "cpu", "%02i",
 154                                      entry->id.fields.cpuid);
 155         } else {
 156                 len += zfcp_dbf_view_dump(out_buf + len, NULL,
 157                                           dump->data,
 158                                           dump->size,
 159                                           dump->offset, dump->total_size);
 160                 if ((dump->offset + dump->size) == dump->total_size)
 161                         len += sprintf(out_buf + len, "\n");
 162         }
 163
 164         return len;
 165 }
 166
 167 void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
 168 {
 169         struct zfcp_adapter *adapter = fsf_req->adapter;
 170         struct fsf_qtcb *qtcb = fsf_req->qtcb;
 171         union fsf_prot_status_qual *prot_status_qual =
 172             &qtcb->prefix.prot_status_qual;
 173         union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
 174         struct scsi_cmnd *scsi_cmnd;
 175         struct zfcp_port *port;
 176         struct zfcp_unit *unit;
 177         struct zfcp_send_els *send_els;
 178         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 179         struct zfcp_hba_dbf_record_response *response = &rec->type.response;
 180         int level;
 181         unsigned long flags;
 182
 183         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 184         memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
 185         strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
 186
 187         if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
 188             (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
 189                 strncpy(rec->tag2, "perr", ZFCP_DBF_TAG_SIZE);
 190                 level = 1;
 191         } else if (qtcb->header.fsf_status != FSF_GOOD) {
 192                 strncpy(rec->tag2, "ferr", ZFCP_DBF_TAG_SIZE);
 193                 level = 1;
 194         } else if ((fsf_req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
 195                    (fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) {
 196                 strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE);
 197                 level = 4;
 198         } else if (qtcb->header.log_length) {
 199                 strncpy(rec->tag2, "qtcb", ZFCP_DBF_TAG_SIZE);
 200                 level = 5;
 201         } else {
 202                 strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE);
 203                 level = 6;
 204         }
 205
 206         response->fsf_command = fsf_req->fsf_command;
 207         response->fsf_reqid = (unsigned long)fsf_req;
 208         response->fsf_seqno = fsf_req->seq_no;
 209         response->fsf_issued = fsf_req->issued;
 210         response->fsf_prot_status = qtcb->prefix.prot_status;
 211         response->fsf_status = qtcb->header.fsf_status;
 212         memcpy(response->fsf_prot_status_qual,
 213                prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
 214         memcpy(response->fsf_status_qual,
 215                fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
 216         response->fsf_req_status = fsf_req->status;
 217         response->sbal_first = fsf_req->sbal_first;
 218         response->sbal_curr = fsf_req->sbal_curr;
 219         response->sbal_last = fsf_req->sbal_last;
 220         response->pool = fsf_req->pool != NULL;
 221         response->erp_action = (unsigned long)fsf_req->erp_action;
 222
 223         switch (fsf_req->fsf_command) {
 224         case FSF_QTCB_FCP_CMND:
 225                 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 226                         break;
 227                 scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
 228                 if (scsi_cmnd != NULL) {
 229                         response->data.send_fcp.scsi_cmnd
 230                             = (unsigned long)scsi_cmnd;
 231                         response->data.send_fcp.scsi_serial
 232                             = scsi_cmnd->serial_number;
 233                 }
 234                 break;
 235
 236         case FSF_QTCB_OPEN_PORT_WITH_DID:
 237         case FSF_QTCB_CLOSE_PORT:
 238         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 239                 port = (struct zfcp_port *)fsf_req->data;
 240                 response->data.port.wwpn = port->wwpn;
 241                 response->data.port.d_id = port->d_id;
 242                 response->data.port.port_handle = qtcb->header.port_handle;
 243                 break;
 244
 245         case FSF_QTCB_OPEN_LUN:
 246         case FSF_QTCB_CLOSE_LUN:
 247                 unit = (struct zfcp_unit *)fsf_req->data;
 248                 port = unit->port;
 249                 response->data.unit.wwpn = port->wwpn;
 250                 response->data.unit.fcp_lun = unit->fcp_lun;
 251                 response->data.unit.port_handle = qtcb->header.port_handle;
 252                 response->data.unit.lun_handle = qtcb->header.lun_handle;
 253                 break;
 254
 255         case FSF_QTCB_SEND_ELS:
 256                 send_els = (struct zfcp_send_els *)fsf_req->data;
 257                 response->data.send_els.d_id = qtcb->bottom.support.d_id;
 258                 response->data.send_els.ls_code = send_els->ls_code >> 24;
 259                 break;
 260
 261         case FSF_QTCB_ABORT_FCP_CMND:
 262         case FSF_QTCB_SEND_GENERIC:
 263         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 264         case FSF_QTCB_EXCHANGE_PORT_DATA:
 265         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 266         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 267                 break;
 268         }
 269
 270         debug_event(adapter->hba_dbf, level,
 271                     rec, sizeof(struct zfcp_hba_dbf_record));
 272
 273         /* have fcp channel microcode fixed to use as little as possible */
 274         if (fsf_req->fsf_command != FSF_QTCB_FCP_CMND) {
 275                 /* adjust length skipping trailing zeros */
 276                 char *buf = (char *)qtcb + qtcb->header.log_start;
 277                 int len = qtcb->header.log_length;
 278                 for (; len && !buf[len - 1]; len--);
 279                 zfcp_dbf_hexdump(adapter->hba_dbf, rec, sizeof(*rec), level,
 280                                  buf, len);
 281         }
 282
 283         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 284 }
 285
 286 void
 287 zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
 288                              struct fsf_status_read_buffer *status_buffer)
 289 {
 290         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 291         unsigned long flags;
 292
 293         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 294         memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
 295         strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
 296         strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
 297
 298         rec->type.status.failed = adapter->status_read_failed;
 299         if (status_buffer != NULL) {
 300                 rec->type.status.status_type = status_buffer->status_type;
 301                 rec->type.status.status_subtype = status_buffer->status_subtype;
 302                 memcpy(&rec->type.status.queue_designator,
 303                        &status_buffer->queue_designator,
 304                        sizeof(struct fsf_queue_designator));
 305
 306                 switch (status_buffer->status_type) {
 307                 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 308                         rec->type.status.payload_size =
 309                             ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
 310                         break;
 311
 312                 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 313                         rec->type.status.payload_size =
 314                             ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
 315                         break;
 316
 317                 case FSF_STATUS_READ_LINK_DOWN:
 318                         switch (status_buffer->status_subtype) {
 319                         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 320                         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 321                                 rec->type.status.payload_size =
 322                                         sizeof(struct fsf_link_down_info);
 323                         }
 324                         break;
 325
 326                 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 327                         rec->type.status.payload_size =
 328                             ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
 329                         break;
 330                 }
 331                 memcpy(&rec->type.status.payload,
 332                        &status_buffer->payload, rec->type.status.payload_size);
 333         }
 334
 335         debug_event(adapter->hba_dbf, 2,
 336                     rec, sizeof(struct zfcp_hba_dbf_record));
 337         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 338 }
 339
 340 void
 341 zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter, unsigned int status,
 342                         unsigned int qdio_error, unsigned int siga_error,
 343                         int sbal_index, int sbal_count)
 344 {
 345         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 346         unsigned long flags;
 347
 348         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 349         memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
 350         strncpy(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE);
 351         rec->type.qdio.status = status;
 352         rec->type.qdio.qdio_error = qdio_error;
 353         rec->type.qdio.siga_error = siga_error;
 354         rec->type.qdio.sbal_index = sbal_index;
 355         rec->type.qdio.sbal_count = sbal_count;
 356         debug_event(adapter->hba_dbf, 0,
 357                     rec, sizeof(struct zfcp_hba_dbf_record));
 358         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 359 }
 360
 361 static int
 362 zfcp_hba_dbf_view_response(char *out_buf,
 363                            struct zfcp_hba_dbf_record_response *rec)
 364 {
 365         int len = 0;
 366
 367         len += zfcp_dbf_view(out_buf + len, "fsf_command", "0x%08x",
 368                              rec->fsf_command);
 369         len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
 370                              rec->fsf_reqid);
 371         len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
 372                              rec->fsf_seqno);
 373         len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
 374         len += zfcp_dbf_view(out_buf + len, "fsf_prot_status", "0x%08x",
 375                              rec->fsf_prot_status);
 376         len += zfcp_dbf_view(out_buf + len, "fsf_status", "0x%08x",
 377                              rec->fsf_status);
 378         len += zfcp_dbf_view_dump(out_buf + len, "fsf_prot_status_qual",
 379                                   rec->fsf_prot_status_qual,
 380                                   FSF_PROT_STATUS_QUAL_SIZE,
 381                                   0, FSF_PROT_STATUS_QUAL_SIZE);
 382         len += zfcp_dbf_view_dump(out_buf + len, "fsf_status_qual",
 383                                   rec->fsf_status_qual,
 384                                   FSF_STATUS_QUALIFIER_SIZE,
 385                                   0, FSF_STATUS_QUALIFIER_SIZE);
 386         len += zfcp_dbf_view(out_buf + len, "fsf_req_status", "0x%08x",
 387                              rec->fsf_req_status);
 388         len += zfcp_dbf_view(out_buf + len, "sbal_first", "0x%02x",
 389                              rec->sbal_first);
 390         len += zfcp_dbf_view(out_buf + len, "sbal_curr", "0x%02x",
 391                              rec->sbal_curr);
 392         len += zfcp_dbf_view(out_buf + len, "sbal_last", "0x%02x",
 393                              rec->sbal_last);
 394         len += zfcp_dbf_view(out_buf + len, "pool", "0x%02x", rec->pool);
 395
 396         switch (rec->fsf_command) {
 397         case FSF_QTCB_FCP_CMND:
 398                 if (rec->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 399                         break;
 400                 len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
 401                                      rec->data.send_fcp.scsi_cmnd);
 402                 len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
 403                                      rec->data.send_fcp.scsi_serial);
 404                 break;
 405
 406         case FSF_QTCB_OPEN_PORT_WITH_DID:
 407         case FSF_QTCB_CLOSE_PORT:
 408         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 409                 len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
 410                                      rec->data.port.wwpn);
 411                 len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
 412                                      rec->data.port.d_id);
 413                 len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
 414                                      rec->data.port.port_handle);
 415                 break;
 416
 417         case FSF_QTCB_OPEN_LUN:
 418         case FSF_QTCB_CLOSE_LUN:
 419                 len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
 420                                      rec->data.unit.wwpn);
 421                 len += zfcp_dbf_view(out_buf + len, "fcp_lun", "0x%016Lx",
 422                                      rec->data.unit.fcp_lun);
 423                 len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
 424                                      rec->data.unit.port_handle);
 425                 len += zfcp_dbf_view(out_buf + len, "lun_handle", "0x%08x",
 426                                      rec->data.unit.lun_handle);
 427                 break;
 428
 429         case FSF_QTCB_SEND_ELS:
 430                 len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
 431                                      rec->data.send_els.d_id);
 432                 len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
 433                                      rec->data.send_els.ls_code);
 434                 break;
 435
 436         case FSF_QTCB_ABORT_FCP_CMND:
 437         case FSF_QTCB_SEND_GENERIC:
 438         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 439         case FSF_QTCB_EXCHANGE_PORT_DATA:
 440         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 441         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 442                 break;
 443         }
 444
 445         return len;
 446 }
 447
 448 static int
 449 zfcp_hba_dbf_view_status(char *out_buf, struct zfcp_hba_dbf_record_status *rec)
 450 {
 451         int len = 0;
 452
 453         len += zfcp_dbf_view(out_buf + len, "failed", "0x%02x", rec->failed);
 454         len += zfcp_dbf_view(out_buf + len, "status_type", "0x%08x",
 455                              rec->status_type);
 456         len += zfcp_dbf_view(out_buf + len, "status_subtype", "0x%08x",
 457                              rec->status_subtype);
 458         len += zfcp_dbf_view_dump(out_buf + len, "queue_designator",
 459                                   (char *)&rec->queue_designator,
 460                                   sizeof(struct fsf_queue_designator),
 461                                   0, sizeof(struct fsf_queue_designator));
 462         len += zfcp_dbf_view_dump(out_buf + len, "payload",
 463                                   (char *)&rec->payload,
 464                                   rec->payload_size, 0, rec->payload_size);
 465
 466         return len;
 467 }
 468
 469 static int
 470 zfcp_hba_dbf_view_qdio(char *out_buf, struct zfcp_hba_dbf_record_qdio *rec)
 471 {
 472         int len = 0;
 473
 474         len += zfcp_dbf_view(out_buf + len, "status", "0x%08x", rec->status);
 475         len += zfcp_dbf_view(out_buf + len, "qdio_error", "0x%08x",
 476                              rec->qdio_error);
 477         len += zfcp_dbf_view(out_buf + len, "siga_error", "0x%08x",
 478                              rec->siga_error);
 479         len += zfcp_dbf_view(out_buf + len, "sbal_index", "0x%02x",
 480                              rec->sbal_index);
 481         len += zfcp_dbf_view(out_buf + len, "sbal_count", "0x%02x",
 482                              rec->sbal_count);
 483
 484         return len;
 485 }
 486
 487 static int
 488 zfcp_hba_dbf_view_format(debug_info_t * id, struct debug_view *view,
 489                          char *out_buf, const char *in_buf)
 490 {
 491         struct zfcp_hba_dbf_record *rec = (struct zfcp_hba_dbf_record *)in_buf;
 492         int len = 0;
 493
 494         if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 495                 return 0;
 496
 497         len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
 498         if (isalpha(rec->tag2[0]))
 499                 len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
 500         if (strncmp(rec->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
 501                 len += zfcp_hba_dbf_view_response(out_buf + len,
 502                                                   &rec->type.response);
 503         else if (strncmp(rec->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
 504                 len += zfcp_hba_dbf_view_status(out_buf + len,
 505                                                 &rec->type.status);
 506         else if (strncmp(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
 507                 len += zfcp_hba_dbf_view_qdio(out_buf + len, &rec->type.qdio);
 508
 509         len += sprintf(out_buf + len, "\n");
 510
 511         return len;
 512 }
 513
 514 static struct debug_view zfcp_hba_dbf_view = {
 515         "structured",
 516         NULL,
 517         &zfcp_dbf_view_header,
 518         &zfcp_hba_dbf_view_format,
 519         NULL,
 520         NULL
 521 };
 522
 523 static const char *zfcp_rec_dbf_tags[] = {
 524         [ZFCP_REC_DBF_ID_THREAD] = "thread",
 525         [ZFCP_REC_DBF_ID_TARGET] = "target",
 526         [ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
 527         [ZFCP_REC_DBF_ID_ACTION] = "action",
 528 };
 529
 530 static const char *zfcp_rec_dbf_ids[] = {
 531         [1]     = "new",
 532         [2]     = "ready",
 533         [3]     = "kill",
 534         [4]     = "down sleep",
 535         [5]     = "down wakeup",
 536         [6]     = "down sleep ecd",
 537         [7]     = "down wakeup ecd",
 538         [8]     = "down sleep epd",
 539         [9]     = "down wakeup epd",
 540         [10]    = "online",
 541         [11]    = "operational",
 542         [12]    = "scsi slave destroy",
 543         [13]    = "propagate failed adapter",
 544         [14]    = "propagate failed port",
 545         [15]    = "block adapter",
 546         [16]    = "unblock adapter",
 547         [17]    = "block port",
 548         [18]    = "unblock port",
 549         [19]    = "block unit",
 550         [20]    = "unblock unit",
 551         [21]    = "unit recovery failed",
 552         [22]    = "port recovery failed",
 553         [23]    = "adapter recovery failed",
 554         [24]    = "qdio queues down",
 555         [25]    = "p2p failed",
 556         [26]    = "nameserver lookup failed",
 557         [27]    = "nameserver port failed",
 558         [28]    = "link up",
 559         [29]    = "link down",
 560         [30]    = "link up status read",
 561         [31]    = "open port failed",
 562         [32]    = "open port failed",
 563         [33]    = "close port",
 564         [34]    = "open unit failed",
 565         [35]    = "exclusive open unit failed",
 566         [36]    = "shared open unit failed",
 567         [37]    = "link down",
 568         [38]    = "link down status read no link",
 569         [39]    = "link down status read fdisc login",
 570         [40]    = "link down status read firmware update",
 571         [41]    = "link down status read unknown reason",
 572         [42]    = "link down ecd incomplete",
 573         [43]    = "link down epd incomplete",
 574         [44]    = "sysfs adapter recovery",
 575         [45]    = "sysfs port recovery",
 576         [46]    = "sysfs unit recovery",
 577         [47]    = "port boxed abort",
 578         [48]    = "unit boxed abort",
 579         [49]    = "port boxed ct",
 580         [50]    = "port boxed close physical",
 581         [51]    = "port boxed open unit",
 582         [52]    = "port boxed close unit",
 583         [53]    = "port boxed fcp",
 584         [54]    = "unit boxed fcp",
 585         [55]    = "port access denied ct",
 586         [56]    = "port access denied els",
 587         [57]    = "port access denied open port",
 588         [58]    = "port access denied close physical",
 589         [59]    = "unit access denied open unit",
 590         [60]    = "shared unit access denied open unit",
 591         [61]    = "unit access denied fcp",
 592         [62]    = "request timeout",
 593         [63]    = "adisc link test reject or timeout",
 594         [64]    = "adisc link test d_id changed",
 595         [65]    = "adisc link test failed",
 596         [66]    = "recovery out of memory",
 597         [67]    = "adapter recovery repeated after state change",
 598         [68]    = "port recovery repeated after state change",
 599         [69]    = "unit recovery repeated after state change",
 600         [70]    = "port recovery follow-up after successful adapter recovery",
 601         [71]    = "adapter recovery escalation after failed adapter recovery",
 602         [72]    = "port recovery follow-up after successful physical port "
 603                   "recovery",
 604         [73]    = "adapter recovery escalation after failed physical port "
 605                   "recovery",
 606         [74]    = "unit recovery follow-up after successful port recovery",
 607         [75]    = "physical port recovery escalation after failed port "
 608                   "recovery",
 609         [76]    = "port recovery escalation after failed unit recovery",
 610         [77]    = "recovery opening nameserver port",
 611         [78]    = "duplicate request id",
 612         [79]    = "link down",
 613         [80]    = "exclusive read-only unit access unsupported",
 614         [81]    = "shared read-write unit access unsupported",
 615         [82]    = "incoming rscn",
 616         [83]    = "incoming plogi",
 617         [84]    = "incoming logo",
 618         [85]    = "online",
 619         [86]    = "offline",
 620         [87]    = "ccw device gone",
 621         [88]    = "ccw device no path",
 622         [89]    = "ccw device operational",
 623         [90]    = "ccw device shutdown",
 624         [91]    = "sysfs port addition",
 625         [92]    = "sysfs port removal",
 626         [93]    = "sysfs adapter recovery",
 627         [94]    = "sysfs unit addition",
 628         [95]    = "sysfs unit removal",
 629         [96]    = "sysfs port recovery",
 630         [97]    = "sysfs unit recovery",
 631         [98]    = "sequence number mismatch",
 632         [99]    = "link up",
 633         [100]   = "error state",
 634         [101]   = "status read physical port closed",
 635         [102]   = "link up status read",
 636         [103]   = "too many failed status read buffers",
 637         [104]   = "port handle not valid abort",
 638         [105]   = "lun handle not valid abort",
 639         [106]   = "port handle not valid ct",
 640         [107]   = "port handle not valid close port",
 641         [108]   = "port handle not valid close physical port",
 642         [109]   = "port handle not valid open unit",
 643         [110]   = "port handle not valid close unit",
 644         [111]   = "lun handle not valid close unit",
 645         [112]   = "port handle not valid fcp",
 646         [113]   = "lun handle not valid fcp",
 647         [114]   = "handle mismatch fcp",
 648         [115]   = "lun not valid fcp",
 649         [116]   = "qdio send failed",
 650         [117]   = "version mismatch",
 651         [118]   = "incompatible qtcb type",
 652         [119]   = "unknown protocol status",
 653         [120]   = "unknown fsf command",
 654         [121]   = "no recommendation for status qualifier",
 655         [122]   = "status read physical port closed in error",
 656         [123]   = "fc service class not supported ct",
 657         [124]   = "fc service class not supported els",
 658         [125]   = "need newer zfcp",
 659         [126]   = "need newer microcode",
 660         [127]   = "arbitrated loop not supported",
 661         [128]   = "unknown topology",
 662         [129]   = "qtcb size mismatch",
 663         [130]   = "unknown fsf status ecd",
 664         [131]   = "fcp request too big",
 665         [132]   = "fc service class not supported fcp",
 666         [133]   = "data direction not valid fcp",
 667         [134]   = "command length not valid fcp",
 668         [135]   = "status read act update",
 669         [136]   = "status read cfdc update",
 670         [137]   = "hbaapi port open",
 671         [138]   = "hbaapi unit open",
 672         [139]   = "hbaapi unit shutdown",
 673         [140]   = "qdio error",
 674         [141]   = "scsi host reset",
 675         [142]   = "dismissing fsf request for recovery action",
 676         [143]   = "recovery action timed out",
 677         [144]   = "recovery action gone",
 678         [145]   = "recovery action being processed",
 679         [146]   = "recovery action ready for next step",
 680 };
 681
 682 static int zfcp_rec_dbf_view_format(debug_info_t *id, struct debug_view *view,
 683                                     char *buf, const char *_rec)
 684 {
 685         struct zfcp_rec_dbf_record *r = (struct zfcp_rec_dbf_record *)_rec;
 686         char *p = buf;
 687
 688         zfcp_dbf_outs(&p, "tag", zfcp_rec_dbf_tags[r->id]);
 689         zfcp_dbf_outs(&p, "hint", zfcp_rec_dbf_ids[r->id2]);
 690         zfcp_dbf_out(&p, "id", "%d", r->id2);
 691         switch (r->id) {
 692         case ZFCP_REC_DBF_ID_THREAD:
 693                 zfcp_dbf_out(&p, "sema", "%d", r->u.thread.sema);
 694                 zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
 695                 zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
 696                 zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
 697                 break;
 698         case ZFCP_REC_DBF_ID_TARGET:
 699                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
 700                 zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
 701                 zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
 702                 zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
 703                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
 704                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
 705                 break;
 706         case ZFCP_REC_DBF_ID_TRIGGER:
 707                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
 708                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
 709                 zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
 710                 zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
 711                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
 712                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
 713                 zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
 714                 zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
 715                 zfcp_dbf_out(&p, "unit_status", "0x%08x", r->u.trigger.us);
 716                 break;
 717         case ZFCP_REC_DBF_ID_ACTION:
 718                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
 719                 zfcp_dbf_out(&p, "fsf_req", "0x%016Lx", r->u.action.fsf_req);
 720                 zfcp_dbf_out(&p, "status", "0x%08Lx", r->u.action.status);
 721                 zfcp_dbf_out(&p, "step", "0x%08Lx", r->u.action.step);
 722                 break;
 723         }
 724         sprintf(p, "\n");
 725         return (p - buf) + 1;
 726 }
 727
 728 static struct debug_view zfcp_rec_dbf_view = {
 729         "structured",
 730         NULL,
 731         &zfcp_dbf_view_header,
 732         &zfcp_rec_dbf_view_format,
 733         NULL,
 734         NULL
 735 };
 736
 737 /**
 738  * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
 739  * @id2: identifier for event
 740  * @adapter: adapter
 741  * @lock: non-zero value indicates that erp_lock has not yet been acquired
 742  */
 743 void zfcp_rec_dbf_event_thread(u8 id2, struct zfcp_adapter *adapter, int lock)
 744 {
 745         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 746         unsigned long flags = 0;
 747         struct list_head *entry;
 748         unsigned ready = 0, running = 0, total;
 749
 750         if (lock)
 751                 read_lock_irqsave(&adapter->erp_lock, flags);
 752         list_for_each(entry, &adapter->erp_ready_head)
 753                 ready++;
 754         list_for_each(entry, &adapter->erp_running_head)
 755                 running++;
 756         total = adapter->erp_total_count;
 757         if (lock)
 758                 read_unlock_irqrestore(&adapter->erp_lock, flags);
 759
 760         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 761         memset(r, 0, sizeof(*r));
 762         r->id = ZFCP_REC_DBF_ID_THREAD;
 763         r->id2 = id2;
 764         r->u.thread.sema = atomic_read(&adapter->erp_ready_sem.count);
 765         r->u.thread.total = total;
 766         r->u.thread.ready = ready;
 767         r->u.thread.running = running;
 768         debug_event(adapter->rec_dbf, 5, r, sizeof(*r));
 769         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 770 }
 771
 772 static void zfcp_rec_dbf_event_target(u8 id2, u64 ref,
 773                                       struct zfcp_adapter *adapter,
 774                                       atomic_t *status, atomic_t *erp_count,
 775                                       u64 wwpn, u32 d_id, u64 fcp_lun)
 776 {
 777         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 778         unsigned long flags;
 779
 780         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 781         memset(r, 0, sizeof(*r));
 782         r->id = ZFCP_REC_DBF_ID_TARGET;
 783         r->id2 = id2;
 784         r->u.target.ref = ref;
 785         r->u.target.status = atomic_read(status);
 786         r->u.target.wwpn = wwpn;
 787         r->u.target.d_id = d_id;
 788         r->u.target.fcp_lun = fcp_lun;
 789         r->u.target.erp_count = atomic_read(erp_count);
 790         debug_event(adapter->rec_dbf, 3, r, sizeof(*r));
 791         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 792 }
 793
 794 /**
 795  * zfcp_rec_dbf_event_adapter - trace event for adapter state change
 796  * @id: identifier for trigger of state change
 797  * @ref: additional reference (e.g. request)
 798  * @adapter: adapter
 799  */
 800 void zfcp_rec_dbf_event_adapter(u8 id, u64 ref, struct zfcp_adapter *adapter)
 801 {
 802         zfcp_rec_dbf_event_target(id, ref, adapter, &adapter->status,
 803                                   &adapter->erp_counter, 0, 0, 0);
 804 }
 805
 806 /**
 807  * zfcp_rec_dbf_event_port - trace event for port state change
 808  * @id: identifier for trigger of state change
 809  * @ref: additional reference (e.g. request)
 810  * @port: port
 811  */
 812 void zfcp_rec_dbf_event_port(u8 id, u64 ref, struct zfcp_port *port)
 813 {
 814         struct zfcp_adapter *adapter = port->adapter;
 815
 816         zfcp_rec_dbf_event_target(id, ref, adapter, &port->status,
 817                                   &port->erp_counter, port->wwpn, port->d_id,
 818                                   0);
 819 }
 820
 821 /**
 822  * zfcp_rec_dbf_event_unit - trace event for unit state change
 823  * @id: identifier for trigger of state change
 824  * @ref: additional reference (e.g. request)
 825  * @unit: unit
 826  */
 827 void zfcp_rec_dbf_event_unit(u8 id, u64 ref, struct zfcp_unit *unit)
 828 {
 829         struct zfcp_port *port = unit->port;
 830         struct zfcp_adapter *adapter = port->adapter;
 831
 832         zfcp_rec_dbf_event_target(id, ref, adapter, &unit->status,
 833                                   &unit->erp_counter, port->wwpn, port->d_id,
 834                                   unit->fcp_lun);
 835 }
 836
 837 /**
 838  * zfcp_rec_dbf_event_trigger - trace event for triggered error recovery
 839  * @id2: identifier for error recovery trigger
 840  * @ref: additional reference (e.g. request)
 841  * @want: originally requested error recovery action
 842  * @need: error recovery action actually initiated
 843  * @action: address of error recovery action struct
 844  * @adapter: adapter
 845  * @port: port
 846  * @unit: unit
 847  */
 848 void zfcp_rec_dbf_event_trigger(u8 id2, u64 ref, u8 want, u8 need, u64 action,
 849                                 struct zfcp_adapter *adapter,
 850                                 struct zfcp_port *port, struct zfcp_unit *unit)
 851 {
 852         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 853         unsigned long flags;
 854
 855         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 856         memset(r, 0, sizeof(*r));
 857         r->id = ZFCP_REC_DBF_ID_TRIGGER;
 858         r->id2 = id2;
 859         r->u.trigger.ref = ref;
 860         r->u.trigger.want = want;
 861         r->u.trigger.need = need;
 862         r->u.trigger.action = action;
 863         r->u.trigger.as = atomic_read(&adapter->status);
 864         if (port) {
 865                 r->u.trigger.ps = atomic_read(&port->status);
 866                 r->u.trigger.wwpn = port->wwpn;
 867         }
 868         if (unit) {
 869                 r->u.trigger.us = atomic_read(&unit->status);
 870                 r->u.trigger.fcp_lun = unit->fcp_lun;
 871         }
 872         debug_event(adapter->rec_dbf, action ? 1 : 4, r, sizeof(*r));
 873         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 874 }
 875
 876 /**
 877  * zfcp_rec_dbf_event_action - trace event showing progress of recovery action
 878  * @id2: identifier
 879  * @erp_action: error recovery action struct pointer
 880  */
 881 void zfcp_rec_dbf_event_action(u8 id2, struct zfcp_erp_action *erp_action)
 882 {
 883         struct zfcp_adapter *adapter = erp_action->adapter;
 884         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 885         unsigned long flags;
 886
 887         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 888         memset(r, 0, sizeof(*r));
 889         r->id = ZFCP_REC_DBF_ID_ACTION;
 890         r->id2 = id2;
 891         r->u.action.action = (u64)erp_action;
 892         r->u.action.status = erp_action->status;
 893         r->u.action.step = erp_action->step;
 894         r->u.action.fsf_req = (u64)erp_action->fsf_req;
 895         debug_event(adapter->rec_dbf, 4, r, sizeof(*r));
 896         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 897 }
 898
 899 static void
 900 _zfcp_san_dbf_event_common_ct(const char *tag, struct zfcp_fsf_req *fsf_req,
 901                               u32 s_id, u32 d_id, void *buffer, int buflen)
 902 {
 903         struct zfcp_send_ct *send_ct = (struct zfcp_send_ct *)fsf_req->data;
 904         struct zfcp_port *port = send_ct->port;
 905         struct zfcp_adapter *adapter = port->adapter;
 906         struct ct_hdr *header = (struct ct_hdr *)buffer;
 907         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
 908         struct zfcp_san_dbf_record_ct *ct = &rec->type.ct;
 909         unsigned long flags;
 910
 911         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 912         memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
 913         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 914         rec->fsf_reqid = (unsigned long)fsf_req;
 915         rec->fsf_seqno = fsf_req->seq_no;
 916         rec->s_id = s_id;
 917         rec->d_id = d_id;
 918         if (strncmp(tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 919                 ct->type.request.cmd_req_code = header->cmd_rsp_code;
 920                 ct->type.request.revision = header->revision;
 921                 ct->type.request.gs_type = header->gs_type;
 922                 ct->type.request.gs_subtype = header->gs_subtype;
 923                 ct->type.request.options = header->options;
 924                 ct->type.request.max_res_size = header->max_res_size;
 925         } else if (strncmp(tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 926                 ct->type.response.cmd_rsp_code = header->cmd_rsp_code;
 927                 ct->type.response.revision = header->revision;
 928                 ct->type.response.reason_code = header->reason_code;
 929                 ct->type.response.reason_code_expl = header->reason_code_expl;
 930                 ct->type.response.vendor_unique = header->vendor_unique;
 931         }
 932         ct->payload_size =
 933             min(buflen - (int)sizeof(struct ct_hdr), ZFCP_DBF_CT_PAYLOAD);
 934         memcpy(ct->payload, buffer + sizeof(struct ct_hdr), ct->payload_size);
 935         debug_event(adapter->san_dbf, 3,
 936                     rec, sizeof(struct zfcp_san_dbf_record));
 937         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 938 }
 939
 940 void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
 941 {
 942         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 943         struct zfcp_port *port = ct->port;
 944         struct zfcp_adapter *adapter = port->adapter;
 945
 946         _zfcp_san_dbf_event_common_ct("octc", fsf_req,
 947                                       fc_host_port_id(adapter->scsi_host),
 948                                       port->d_id, zfcp_sg_to_address(ct->req),
 949                                       ct->req->length);
 950 }
 951
 952 void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
 953 {
 954         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 955         struct zfcp_port *port = ct->port;
 956         struct zfcp_adapter *adapter = port->adapter;
 957
 958         _zfcp_san_dbf_event_common_ct("rctc", fsf_req, port->d_id,
 959                                       fc_host_port_id(adapter->scsi_host),
 960                                       zfcp_sg_to_address(ct->resp),
 961                                       ct->resp->length);
 962 }
 963
 964 static void
 965 _zfcp_san_dbf_event_common_els(const char *tag, int level,
 966                                struct zfcp_fsf_req *fsf_req, u32 s_id,
 967                                u32 d_id, u8 ls_code, void *buffer, int buflen)
 968 {
 969         struct zfcp_adapter *adapter = fsf_req->adapter;
 970         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
 971         unsigned long flags;
 972
 973         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 974         memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
 975         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 976         rec->fsf_reqid = (unsigned long)fsf_req;
 977         rec->fsf_seqno = fsf_req->seq_no;
 978         rec->s_id = s_id;
 979         rec->d_id = d_id;
 980         rec->type.els.ls_code = ls_code;
 981         debug_event(adapter->san_dbf, level, rec, sizeof(*rec));
 982         zfcp_dbf_hexdump(adapter->san_dbf, rec, sizeof(*rec), level,
 983                          buffer, min(buflen, ZFCP_DBF_ELS_MAX_PAYLOAD));
 984         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 985 }
 986
 987 void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
 988 {
 989         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 990
 991         _zfcp_san_dbf_event_common_els("oels", 2, fsf_req,
 992                                        fc_host_port_id(els->adapter->scsi_host),
 993                                        els->d_id,
 994                                        *(u8 *) zfcp_sg_to_address(els->req),
 995                                        zfcp_sg_to_address(els->req),
 996                                        els->req->length);
 997 }
 998
 999 void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
1000 {
1001         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
1002
1003         _zfcp_san_dbf_event_common_els("rels", 2, fsf_req, els->d_id,
1004                                        fc_host_port_id(els->adapter->scsi_host),
1005                                        *(u8 *) zfcp_sg_to_address(els->req),
1006                                        zfcp_sg_to_address(els->resp),
1007                                        els->resp->length);
1008 }
1009
1010 void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
1011 {
1012         struct zfcp_adapter *adapter = fsf_req->adapter;
1013         struct fsf_status_read_buffer *status_buffer =
1014             (struct fsf_status_read_buffer *)fsf_req->data;
1015         int length = (int)status_buffer->length -
1016             (int)((void *)&status_buffer->payload - (void *)status_buffer);
1017
1018         _zfcp_san_dbf_event_common_els("iels", 1, fsf_req, status_buffer->d_id,
1019                                        fc_host_port_id(adapter->scsi_host),
1020                                        *(u8 *) status_buffer->payload,
1021                                        (void *)status_buffer->payload, length);
1022 }
1023
1024 static int
1025 zfcp_san_dbf_view_format(debug_info_t * id, struct debug_view *view,
1026                          char *out_buf, const char *in_buf)
1027 {
1028         struct zfcp_san_dbf_record *rec = (struct zfcp_san_dbf_record *)in_buf;
1029         char *buffer = NULL;
1030         int buflen = 0, total = 0;
1031         int len = 0;
1032
1033         if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
1034                 return 0;
1035
1036         len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
1037         len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
1038                              rec->fsf_reqid);
1039         len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
1040                              rec->fsf_seqno);
1041         len += zfcp_dbf_view(out_buf + len, "s_id", "0x%06x", rec->s_id);
1042         len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x", rec->d_id);
1043
1044         if (strncmp(rec->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
1045                 len += zfcp_dbf_view(out_buf + len, "cmd_req_code", "0x%04x",
1046                                      rec->type.ct.type.request.cmd_req_code);
1047                 len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
1048                                      rec->type.ct.type.request.revision);
1049                 len += zfcp_dbf_view(out_buf + len, "gs_type", "0x%02x",
1050                                      rec->type.ct.type.request.gs_type);
1051                 len += zfcp_dbf_view(out_buf + len, "gs_subtype", "0x%02x",
1052                                      rec->type.ct.type.request.gs_subtype);
1053                 len += zfcp_dbf_view(out_buf + len, "options", "0x%02x",
1054                                      rec->type.ct.type.request.options);
1055                 len += zfcp_dbf_view(out_buf + len, "max_res_size", "0x%04x",
1056                                      rec->type.ct.type.request.max_res_size);
1057                 total = rec->type.ct.payload_size;
1058                 buffer = rec->type.ct.payload;
1059                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
1060         } else if (strncmp(rec->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
1061                 len += zfcp_dbf_view(out_buf + len, "cmd_rsp_code", "0x%04x",
1062                                      rec->type.ct.type.response.cmd_rsp_code);
1063                 len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
1064                                      rec->type.ct.type.response.revision);
1065                 len += zfcp_dbf_view(out_buf + len, "reason_code", "0x%02x",
1066                                      rec->type.ct.type.response.reason_code);
1067                 len +=
1068                     zfcp_dbf_view(out_buf + len, "reason_code_expl", "0x%02x",
1069                                   rec->type.ct.type.response.reason_code_expl);
1070                 len +=
1071                     zfcp_dbf_view(out_buf + len, "vendor_unique", "0x%02x",
1072                                   rec->type.ct.type.response.vendor_unique);
1073                 total = rec->type.ct.payload_size;
1074                 buffer = rec->type.ct.payload;
1075                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
1076         } else if (strncmp(rec->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
1077                    strncmp(rec->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
1078                    strncmp(rec->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
1079                 len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
1080                                      rec->type.els.ls_code);
1081                 total = rec->type.els.payload_size;
1082                 buffer = rec->type.els.payload;
1083                 buflen = min(total, ZFCP_DBF_ELS_PAYLOAD);
1084         }
1085
1086         len += zfcp_dbf_view_dump(out_buf + len, "payload",
1087                                   buffer, buflen, 0, total);
1088
1089         if (buflen == total)
1090                 len += sprintf(out_buf + len, "\n");
1091
1092         return len;
1093 }
1094
1095 static struct debug_view zfcp_san_dbf_view = {
1096         "structured",
1097         NULL,
1098         &zfcp_dbf_view_header,
1099         &zfcp_san_dbf_view_format,
1100         NULL,
1101         NULL
1102 };
1103
1104 static void
1105 _zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level,
1106                             struct zfcp_adapter *adapter,
1107                             struct scsi_cmnd *scsi_cmnd,
1108                             struct zfcp_fsf_req *fsf_req,
1109                             unsigned long old_req_id)
1110 {
1111         struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
1112         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
1113         unsigned long flags;
1114         struct fcp_rsp_iu *fcp_rsp;
1115         char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
1116         int offset = 0, buflen = 0;
1117
1118         spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
1119         do {
1120                 memset(rec, 0, sizeof(struct zfcp_scsi_dbf_record));
1121                 if (offset == 0) {
1122                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
1123                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
1124                         if (scsi_cmnd != NULL) {
1125                                 if (scsi_cmnd->device) {
1126                                         rec->scsi_id = scsi_cmnd->device->id;
1127                                         rec->scsi_lun = scsi_cmnd->device->lun;
1128                                 }
1129                                 rec->scsi_result = scsi_cmnd->result;
1130                                 rec->scsi_cmnd = (unsigned long)scsi_cmnd;
1131                                 rec->scsi_serial = scsi_cmnd->serial_number;
1132                                 memcpy(rec->scsi_opcode, &scsi_cmnd->cmnd,
1133                                         min((int)scsi_cmnd->cmd_len,
1134                                                 ZFCP_DBF_SCSI_OPCODE));
1135                                 rec->scsi_retries = scsi_cmnd->retries;
1136                                 rec->scsi_allowed = scsi_cmnd->allowed;
1137                         }
1138                         if (fsf_req != NULL) {
1139                                 fcp_rsp = (struct fcp_rsp_iu *)
1140                                     &(fsf_req->qtcb->bottom.io.fcp_rsp);
1141                                 fcp_rsp_info =
1142                                     zfcp_get_fcp_rsp_info_ptr(fcp_rsp);
1143                                 fcp_sns_info =
1144                                     zfcp_get_fcp_sns_info_ptr(fcp_rsp);
1145
1146                                 rec->type.fcp.rsp_validity =
1147                                     fcp_rsp->validity.value;
1148                                 rec->type.fcp.rsp_scsi_status =
1149                                     fcp_rsp->scsi_status;
1150                                 rec->type.fcp.rsp_resid = fcp_rsp->fcp_resid;
1151                                 if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
1152                                         rec->type.fcp.rsp_code =
1153                                             *(fcp_rsp_info + 3);
1154                                 if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
1155                                         buflen = min((int)fcp_rsp->fcp_sns_len,
1156                                                      ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
1157                                         rec->type.fcp.sns_info_len = buflen;
1158                                         memcpy(rec->type.fcp.sns_info,
1159                                                fcp_sns_info,
1160                                                min(buflen,
1161                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
1162                                         offset += min(buflen,
1163                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
1164                                 }
1165
1166                                 rec->fsf_reqid = (unsigned long)fsf_req;
1167                                 rec->fsf_seqno = fsf_req->seq_no;
1168                                 rec->fsf_issued = fsf_req->issued;
1169                         }
1170                         rec->type.old_fsf_reqid = old_req_id;
1171                 } else {
1172                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
1173                         dump->total_size = buflen;
1174                         dump->offset = offset;
1175                         dump->size = min(buflen - offset,
1176                                          (int)sizeof(struct
1177                                                      zfcp_scsi_dbf_record) -
1178                                          (int)sizeof(struct zfcp_dbf_dump));
1179                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
1180                         offset += dump->size;
1181                 }
1182                 debug_event(adapter->scsi_dbf, level,
1183                             rec, sizeof(struct zfcp_scsi_dbf_record));
1184         } while (offset < buflen);
1185         spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
1186 }
1187
1188 void
1189 zfcp_scsi_dbf_event_result(const char *tag, int level,
1190                            struct zfcp_adapter *adapter,
1191                            struct scsi_cmnd *scsi_cmnd,
1192                            struct zfcp_fsf_req *fsf_req)
1193 {
1194         _zfcp_scsi_dbf_event_common("rslt", tag, level,
1195                         adapter, scsi_cmnd, fsf_req, 0);
1196 }
1197
1198 void
1199 zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
1200                           struct scsi_cmnd *scsi_cmnd,
1201                           struct zfcp_fsf_req *new_fsf_req,
1202                           unsigned long old_req_id)
1203 {
1204         _zfcp_scsi_dbf_event_common("abrt", tag, 1,
1205                         adapter, scsi_cmnd, new_fsf_req, old_req_id);
1206 }
1207
1208 void
1209 zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag, struct zfcp_unit *unit,
1210                              struct scsi_cmnd *scsi_cmnd)
1211 {
1212         struct zfcp_adapter *adapter = unit->port->adapter;
1213
1214         _zfcp_scsi_dbf_event_common(flag == FCP_TARGET_RESET ? "trst" : "lrst",
1215                         tag, 1, adapter, scsi_cmnd, NULL, 0);
1216 }
1217
1218 static int
1219 zfcp_scsi_dbf_view_format(debug_info_t * id, struct debug_view *view,
1220                           char *out_buf, const char *in_buf)
1221 {
1222         struct zfcp_scsi_dbf_record *rec =
1223             (struct zfcp_scsi_dbf_record *)in_buf;
1224         int len = 0;
1225
1226         if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
1227                 return 0;
1228
1229         len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
1230         len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
1231         len += zfcp_dbf_view(out_buf + len, "scsi_id", "0x%08x", rec->scsi_id);
1232         len += zfcp_dbf_view(out_buf + len, "scsi_lun", "0x%08x",
1233                              rec->scsi_lun);
1234         len += zfcp_dbf_view(out_buf + len, "scsi_result", "0x%08x",
1235                              rec->scsi_result);
1236         len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
1237                              rec->scsi_cmnd);
1238         len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
1239                              rec->scsi_serial);
1240         len += zfcp_dbf_view_dump(out_buf + len, "scsi_opcode",
1241                                   rec->scsi_opcode,
1242                                   ZFCP_DBF_SCSI_OPCODE,
1243                                   0, ZFCP_DBF_SCSI_OPCODE);
1244         len += zfcp_dbf_view(out_buf + len, "scsi_retries", "0x%02x",
1245                              rec->scsi_retries);
1246         len += zfcp_dbf_view(out_buf + len, "scsi_allowed", "0x%02x",
1247                              rec->scsi_allowed);
1248         if (strncmp(rec->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0) {
1249                 len += zfcp_dbf_view(out_buf + len, "old_fsf_reqid", "0x%0Lx",
1250                                      rec->type.old_fsf_reqid);
1251         }
1252         len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
1253                              rec->fsf_reqid);
1254         len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
1255                              rec->fsf_seqno);
1256         len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
1257         if (strncmp(rec->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
1258                 len +=
1259                     zfcp_dbf_view(out_buf + len, "fcp_rsp_validity", "0x%02x",
1260                                   rec->type.fcp.rsp_validity);
1261                 len +=
1262                     zfcp_dbf_view(out_buf + len, "fcp_rsp_scsi_status",
1263                                   "0x%02x", rec->type.fcp.rsp_scsi_status);
1264                 len +=
1265                     zfcp_dbf_view(out_buf + len, "fcp_rsp_resid", "0x%08x",
1266                                   rec->type.fcp.rsp_resid);
1267                 len +=
1268                     zfcp_dbf_view(out_buf + len, "fcp_rsp_code", "0x%08x",
1269                                   rec->type.fcp.rsp_code);
1270                 len +=
1271                     zfcp_dbf_view(out_buf + len, "fcp_sns_info_len", "0x%08x",
1272                                   rec->type.fcp.sns_info_len);
1273                 len +=
1274                     zfcp_dbf_view_dump(out_buf + len, "fcp_sns_info",
1275                                        rec->type.fcp.sns_info,
1276                                        min((int)rec->type.fcp.sns_info_len,
1277                                            ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
1278                                        rec->type.fcp.sns_info_len);
1279         }
1280
1281         len += sprintf(out_buf + len, "\n");
1282
1283         return len;
1284 }
1285
1286 static struct debug_view zfcp_scsi_dbf_view = {
1287         "structured",
1288         NULL,
1289         &zfcp_dbf_view_header,
1290         &zfcp_scsi_dbf_view_format,
1291         NULL,
1292         NULL
1293 };
1294
1295 /**
1296  * zfcp_adapter_debug_register - registers debug feature for an adapter
1297  * @adapter: pointer to adapter for which debug features should be registered
1298  * return: -ENOMEM on error, 0 otherwise
1299  */
1300 int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
1301 {
1302         char dbf_name[DEBUG_MAX_NAME_LEN];
1303
1304         /* debug feature area which records recovery activity */
1305         sprintf(dbf_name, "zfcp_%s_rec", zfcp_get_busid_by_adapter(adapter));
1306         adapter->rec_dbf = debug_register(dbf_name, dbfsize, 1,
1307                                           sizeof(struct zfcp_rec_dbf_record));
1308         if (!adapter->rec_dbf)
1309                 goto failed;
1310         debug_register_view(adapter->rec_dbf, &debug_hex_ascii_view);
1311         debug_register_view(adapter->rec_dbf, &zfcp_rec_dbf_view);
1312         debug_set_level(adapter->rec_dbf, 3);
1313
1314         /* debug feature area which records HBA (FSF and QDIO) conditions */
1315         sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter));
1316         adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
1317                                           sizeof(struct zfcp_hba_dbf_record));
1318         if (!adapter->hba_dbf)
1319                 goto failed;
1320         debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
1321         debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
1322         debug_set_level(adapter->hba_dbf, 3);
1323
1324         /* debug feature area which records SAN command failures and recovery */
1325         sprintf(dbf_name, "zfcp_%s_san", zfcp_get_busid_by_adapter(adapter));
1326         adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
1327                                           sizeof(struct zfcp_san_dbf_record));
1328         if (!adapter->san_dbf)
1329                 goto failed;
1330         debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
1331         debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
1332         debug_set_level(adapter->san_dbf, 6);
1333
1334         /* debug feature area which records SCSI command failures and recovery */
1335         sprintf(dbf_name, "zfcp_%s_scsi", zfcp_get_busid_by_adapter(adapter));
1336         adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
1337                                            sizeof(struct zfcp_scsi_dbf_record));
1338         if (!adapter->scsi_dbf)
1339                 goto failed;
1340         debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
1341         debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
1342         debug_set_level(adapter->scsi_dbf, 3);
1343
1344         return 0;
1345
1346  failed:
1347         zfcp_adapter_debug_unregister(adapter);
1348
1349         return -ENOMEM;
1350 }
1351
1352 /**
1353  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
1354  * @adapter: pointer to adapter for which debug features should be unregistered
1355  */
1356 void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
1357 {
1358         debug_unregister(adapter->scsi_dbf);
1359         debug_unregister(adapter->san_dbf);
1360         debug_unregister(adapter->hba_dbf);
1361         debug_unregister(adapter->rec_dbf);
1362         adapter->scsi_dbf = NULL;
1363         adapter->san_dbf = NULL;
1364         adapter->hba_dbf = NULL;
1365         adapter->rec_dbf = NULL;
1366 }
1367
1368 #undef ZFCP_LOG_AREA