err.no 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 /* FIXME: this duplicate this code in s390 debug feature */
  53 static void zfcp_dbf_timestamp(unsigned long long stck, struct timespec *time)
  54 {
  55         unsigned long long sec;
  56
  57         stck -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
  58         sec = stck >> 12;
  59         do_div(sec, 1000000);
  60         time->tv_sec = sec;
  61         stck -= (sec * 1000000) << 12;
  62         time->tv_nsec = ((stck * 1000) >> 12);
  63 }
  64
  65 static void zfcp_dbf_tag(char **p, const char *label, const char *tag)
  66 {
  67         int i;
  68
  69         *p += sprintf(*p, "%-24s", label);
  70         for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
  71                 *p += sprintf(*p, "%c", tag[i]);
  72         *p += sprintf(*p, "\n");
  73 }
  74
  75 static void zfcp_dbf_outs(char **buf, const char *s1, const char *s2)
  76 {
  77         *buf += sprintf(*buf, "%-24s%s\n", s1, s2);
  78 }
  79
  80 static void zfcp_dbf_out(char **buf, const char *s, const char *format, ...)
  81 {
  82         va_list arg;
  83
  84         *buf += sprintf(*buf, "%-24s", s);
  85         va_start(arg, format);
  86         *buf += vsprintf(*buf, format, arg);
  87         va_end(arg);
  88         *buf += sprintf(*buf, "\n");
  89 }
  90
  91 static void zfcp_dbf_outd(char **p, const char *label, char *buffer,
  92                           int buflen, int offset, int total_size)
  93 {
  94         if (!offset)
  95                 *p += sprintf(*p, "%-24s  ", label);
  96         while (buflen--) {
  97                 if (offset > 0) {
  98                         if ((offset % 32) == 0)
  99                                 *p += sprintf(*p, "\n%-24c  ", ' ');
 100                         else if ((offset % 4) == 0)
 101                                 *p += sprintf(*p, " ");
 102                 }
 103                 *p += sprintf(*p, "%02x", *buffer++);
 104                 if (++offset == total_size) {
 105                         *p += sprintf(*p, "\n");
 106                         break;
 107                 }
 108         }
 109         if (!total_size)
 110                 *p += sprintf(*p, "\n");
 111 }
 112
 113 static int
 114 zfcp_dbf_view_header(debug_info_t * id, struct debug_view *view, int area,
 115                      debug_entry_t * entry, char *out_buf)
 116 {
 117         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
 118         struct timespec t;
 119         char *p = out_buf;
 120
 121         if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
 122                 zfcp_dbf_timestamp(entry->id.stck, &t);
 123                 zfcp_dbf_out(&p, "timestamp", "%011lu:%06lu",
 124                              t.tv_sec, t.tv_nsec);
 125                 zfcp_dbf_out(&p, "cpu", "%02i", entry->id.fields.cpuid);
 126         } else  {
 127                 zfcp_dbf_outd(&p, NULL, dump->data, dump->size, dump->offset,
 128                               dump->total_size);
 129                 if ((dump->offset + dump->size) == dump->total_size)
 130                         p += sprintf(p, "\n");
 131         }
 132         return p - out_buf;
 133 }
 134
 135 void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
 136 {
 137         struct zfcp_adapter *adapter = fsf_req->adapter;
 138         struct fsf_qtcb *qtcb = fsf_req->qtcb;
 139         union fsf_prot_status_qual *prot_status_qual =
 140             &qtcb->prefix.prot_status_qual;
 141         union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
 142         struct scsi_cmnd *scsi_cmnd;
 143         struct zfcp_port *port;
 144         struct zfcp_unit *unit;
 145         struct zfcp_send_els *send_els;
 146         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 147         struct zfcp_hba_dbf_record_response *response = &rec->type.response;
 148         int level;
 149         unsigned long flags;
 150
 151         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 152         memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
 153         strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
 154
 155         if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
 156             (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
 157                 strncpy(rec->tag2, "perr", ZFCP_DBF_TAG_SIZE);
 158                 level = 1;
 159         } else if (qtcb->header.fsf_status != FSF_GOOD) {
 160                 strncpy(rec->tag2, "ferr", ZFCP_DBF_TAG_SIZE);
 161                 level = 1;
 162         } else if ((fsf_req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
 163                    (fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) {
 164                 strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE);
 165                 level = 4;
 166         } else if (qtcb->header.log_length) {
 167                 strncpy(rec->tag2, "qtcb", ZFCP_DBF_TAG_SIZE);
 168                 level = 5;
 169         } else {
 170                 strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE);
 171                 level = 6;
 172         }
 173
 174         response->fsf_command = fsf_req->fsf_command;
 175         response->fsf_reqid = (unsigned long)fsf_req;
 176         response->fsf_seqno = fsf_req->seq_no;
 177         response->fsf_issued = fsf_req->issued;
 178         response->fsf_prot_status = qtcb->prefix.prot_status;
 179         response->fsf_status = qtcb->header.fsf_status;
 180         memcpy(response->fsf_prot_status_qual,
 181                prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
 182         memcpy(response->fsf_status_qual,
 183                fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
 184         response->fsf_req_status = fsf_req->status;
 185         response->sbal_first = fsf_req->sbal_first;
 186         response->sbal_curr = fsf_req->sbal_curr;
 187         response->sbal_last = fsf_req->sbal_last;
 188         response->pool = fsf_req->pool != NULL;
 189         response->erp_action = (unsigned long)fsf_req->erp_action;
 190
 191         switch (fsf_req->fsf_command) {
 192         case FSF_QTCB_FCP_CMND:
 193                 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 194                         break;
 195                 scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
 196                 if (scsi_cmnd != NULL) {
 197                         response->data.send_fcp.scsi_cmnd
 198                             = (unsigned long)scsi_cmnd;
 199                         response->data.send_fcp.scsi_serial
 200                             = scsi_cmnd->serial_number;
 201                 }
 202                 break;
 203
 204         case FSF_QTCB_OPEN_PORT_WITH_DID:
 205         case FSF_QTCB_CLOSE_PORT:
 206         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 207                 port = (struct zfcp_port *)fsf_req->data;
 208                 response->data.port.wwpn = port->wwpn;
 209                 response->data.port.d_id = port->d_id;
 210                 response->data.port.port_handle = qtcb->header.port_handle;
 211                 break;
 212
 213         case FSF_QTCB_OPEN_LUN:
 214         case FSF_QTCB_CLOSE_LUN:
 215                 unit = (struct zfcp_unit *)fsf_req->data;
 216                 port = unit->port;
 217                 response->data.unit.wwpn = port->wwpn;
 218                 response->data.unit.fcp_lun = unit->fcp_lun;
 219                 response->data.unit.port_handle = qtcb->header.port_handle;
 220                 response->data.unit.lun_handle = qtcb->header.lun_handle;
 221                 break;
 222
 223         case FSF_QTCB_SEND_ELS:
 224                 send_els = (struct zfcp_send_els *)fsf_req->data;
 225                 response->data.send_els.d_id = qtcb->bottom.support.d_id;
 226                 response->data.send_els.ls_code = send_els->ls_code >> 24;
 227                 break;
 228
 229         case FSF_QTCB_ABORT_FCP_CMND:
 230         case FSF_QTCB_SEND_GENERIC:
 231         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 232         case FSF_QTCB_EXCHANGE_PORT_DATA:
 233         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 234         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 235                 break;
 236         }
 237
 238         debug_event(adapter->hba_dbf, level,
 239                     rec, sizeof(struct zfcp_hba_dbf_record));
 240
 241         /* have fcp channel microcode fixed to use as little as possible */
 242         if (fsf_req->fsf_command != FSF_QTCB_FCP_CMND) {
 243                 /* adjust length skipping trailing zeros */
 244                 char *buf = (char *)qtcb + qtcb->header.log_start;
 245                 int len = qtcb->header.log_length;
 246                 for (; len && !buf[len - 1]; len--);
 247                 zfcp_dbf_hexdump(adapter->hba_dbf, rec, sizeof(*rec), level,
 248                                  buf, len);
 249         }
 250
 251         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 252 }
 253
 254 void
 255 zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
 256                              struct fsf_status_read_buffer *status_buffer)
 257 {
 258         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 259         unsigned long flags;
 260
 261         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 262         memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
 263         strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
 264         strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
 265
 266         rec->type.status.failed = adapter->status_read_failed;
 267         if (status_buffer != NULL) {
 268                 rec->type.status.status_type = status_buffer->status_type;
 269                 rec->type.status.status_subtype = status_buffer->status_subtype;
 270                 memcpy(&rec->type.status.queue_designator,
 271                        &status_buffer->queue_designator,
 272                        sizeof(struct fsf_queue_designator));
 273
 274                 switch (status_buffer->status_type) {
 275                 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 276                         rec->type.status.payload_size =
 277                             ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
 278                         break;
 279
 280                 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 281                         rec->type.status.payload_size =
 282                             ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
 283                         break;
 284
 285                 case FSF_STATUS_READ_LINK_DOWN:
 286                         switch (status_buffer->status_subtype) {
 287                         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 288                         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 289                                 rec->type.status.payload_size =
 290                                         sizeof(struct fsf_link_down_info);
 291                         }
 292                         break;
 293
 294                 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 295                         rec->type.status.payload_size =
 296                             ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
 297                         break;
 298                 }
 299                 memcpy(&rec->type.status.payload,
 300                        &status_buffer->payload, rec->type.status.payload_size);
 301         }
 302
 303         debug_event(adapter->hba_dbf, 2,
 304                     rec, sizeof(struct zfcp_hba_dbf_record));
 305         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 306 }
 307
 308 void
 309 zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter, unsigned int status,
 310                         unsigned int qdio_error, unsigned int siga_error,
 311                         int sbal_index, int sbal_count)
 312 {
 313         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 314         unsigned long flags;
 315
 316         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 317         memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
 318         strncpy(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE);
 319         rec->type.qdio.status = status;
 320         rec->type.qdio.qdio_error = qdio_error;
 321         rec->type.qdio.siga_error = siga_error;
 322         rec->type.qdio.sbal_index = sbal_index;
 323         rec->type.qdio.sbal_count = sbal_count;
 324         debug_event(adapter->hba_dbf, 0,
 325                     rec, sizeof(struct zfcp_hba_dbf_record));
 326         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 327 }
 328
 329 static void zfcp_hba_dbf_view_response(char **p,
 330                                        struct zfcp_hba_dbf_record_response *r)
 331 {
 332         struct timespec t;
 333
 334         zfcp_dbf_out(p, "fsf_command", "0x%08x", r->fsf_command);
 335         zfcp_dbf_out(p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 336         zfcp_dbf_out(p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 337         zfcp_dbf_timestamp(r->fsf_issued, &t);
 338         zfcp_dbf_out(p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
 339         zfcp_dbf_out(p, "fsf_prot_status", "0x%08x", r->fsf_prot_status);
 340         zfcp_dbf_out(p, "fsf_status", "0x%08x", r->fsf_status);
 341         zfcp_dbf_outd(p, "fsf_prot_status_qual", r->fsf_prot_status_qual,
 342                       FSF_PROT_STATUS_QUAL_SIZE, 0, FSF_PROT_STATUS_QUAL_SIZE);
 343         zfcp_dbf_outd(p, "fsf_status_qual", r->fsf_status_qual,
 344                       FSF_STATUS_QUALIFIER_SIZE, 0, FSF_STATUS_QUALIFIER_SIZE);
 345         zfcp_dbf_out(p, "fsf_req_status", "0x%08x", r->fsf_req_status);
 346         zfcp_dbf_out(p, "sbal_first", "0x%02x", r->sbal_first);
 347         zfcp_dbf_out(p, "sbal_curr", "0x%02x", r->sbal_curr);
 348         zfcp_dbf_out(p, "sbal_last", "0x%02x", r->sbal_last);
 349         zfcp_dbf_out(p, "pool", "0x%02x", r->pool);
 350
 351         switch (r->fsf_command) {
 352         case FSF_QTCB_FCP_CMND:
 353                 if (r->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 354                         break;
 355                 zfcp_dbf_out(p, "scsi_cmnd", "0x%0Lx",
 356                              r->data.send_fcp.scsi_cmnd);
 357                 zfcp_dbf_out(p, "scsi_serial", "0x%016Lx",
 358                              r->data.send_fcp.scsi_serial);
 359                 break;
 360
 361         case FSF_QTCB_OPEN_PORT_WITH_DID:
 362         case FSF_QTCB_CLOSE_PORT:
 363         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 364                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->data.port.wwpn);
 365                 zfcp_dbf_out(p, "d_id", "0x%06x", r->data.port.d_id);
 366                 zfcp_dbf_out(p, "port_handle", "0x%08x",
 367                              r->data.port.port_handle);
 368                 break;
 369
 370         case FSF_QTCB_OPEN_LUN:
 371         case FSF_QTCB_CLOSE_LUN:
 372                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->data.unit.wwpn);
 373                 zfcp_dbf_out(p, "fcp_lun", "0x%016Lx", r->data.unit.fcp_lun);
 374                 zfcp_dbf_out(p, "port_handle", "0x%08x",
 375                              r->data.unit.port_handle);
 376                 zfcp_dbf_out(p, "lun_handle", "0x%08x",
 377                              r->data.unit.lun_handle);
 378                 break;
 379
 380         case FSF_QTCB_SEND_ELS:
 381                 zfcp_dbf_out(p, "d_id", "0x%06x", r->data.send_els.d_id);
 382                 zfcp_dbf_out(p, "ls_code", "0x%02x", r->data.send_els.ls_code);
 383                 break;
 384
 385         case FSF_QTCB_ABORT_FCP_CMND:
 386         case FSF_QTCB_SEND_GENERIC:
 387         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 388         case FSF_QTCB_EXCHANGE_PORT_DATA:
 389         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 390         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 391                 break;
 392         }
 393 }
 394
 395 static void zfcp_hba_dbf_view_status(char **p,
 396                                      struct zfcp_hba_dbf_record_status *r)
 397 {
 398         zfcp_dbf_out(p, "failed", "0x%02x", r->failed);
 399         zfcp_dbf_out(p, "status_type", "0x%08x", r->status_type);
 400         zfcp_dbf_out(p, "status_subtype", "0x%08x", r->status_subtype);
 401         zfcp_dbf_outd(p, "queue_designator", (char *)&r->queue_designator,
 402                       sizeof(struct fsf_queue_designator), 0,
 403                       sizeof(struct fsf_queue_designator));
 404         zfcp_dbf_outd(p, "payload", (char *)&r->payload, r->payload_size, 0,
 405                       r->payload_size);
 406 }
 407
 408 static void zfcp_hba_dbf_view_qdio(char **p, struct zfcp_hba_dbf_record_qdio *r)
 409 {
 410         zfcp_dbf_out(p, "status", "0x%08x", r->status);
 411         zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
 412         zfcp_dbf_out(p, "siga_error", "0x%08x", r->siga_error);
 413         zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
 414         zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
 415 }
 416
 417 static int zfcp_hba_dbf_view_format(debug_info_t *id, struct debug_view *view,
 418                                     char *out_buf, const char *in_buf)
 419 {
 420         struct zfcp_hba_dbf_record *r = (struct zfcp_hba_dbf_record *)in_buf;
 421         char *p = out_buf;
 422
 423         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 424                 return 0;
 425
 426         zfcp_dbf_tag(&p, "tag", r->tag);
 427         if (isalpha(r->tag2[0]))
 428                 zfcp_dbf_tag(&p, "tag2", r->tag2);
 429
 430         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
 431                 zfcp_hba_dbf_view_response(&p, &r->type.response);
 432         else if (strncmp(r->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
 433                 zfcp_hba_dbf_view_status(&p, &r->type.status);
 434         else if (strncmp(r->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
 435                 zfcp_hba_dbf_view_qdio(&p, &r->type.qdio);
 436
 437         p += sprintf(p, "\n");
 438         return p - out_buf;
 439 }
 440
 441 static struct debug_view zfcp_hba_dbf_view = {
 442         "structured",
 443         NULL,
 444         &zfcp_dbf_view_header,
 445         &zfcp_hba_dbf_view_format,
 446         NULL,
 447         NULL
 448 };
 449
 450 static const char *zfcp_rec_dbf_tags[] = {
 451         [ZFCP_REC_DBF_ID_THREAD] = "thread",
 452         [ZFCP_REC_DBF_ID_TARGET] = "target",
 453         [ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
 454         [ZFCP_REC_DBF_ID_ACTION] = "action",
 455 };
 456
 457 static const char *zfcp_rec_dbf_ids[] = {
 458         [1]     = "new",
 459         [2]     = "ready",
 460         [3]     = "kill",
 461         [4]     = "down sleep",
 462         [5]     = "down wakeup",
 463         [6]     = "down sleep ecd",
 464         [7]     = "down wakeup ecd",
 465         [8]     = "down sleep epd",
 466         [9]     = "down wakeup epd",
 467         [10]    = "online",
 468         [11]    = "operational",
 469         [12]    = "scsi slave destroy",
 470         [13]    = "propagate failed adapter",
 471         [14]    = "propagate failed port",
 472         [15]    = "block adapter",
 473         [16]    = "unblock adapter",
 474         [17]    = "block port",
 475         [18]    = "unblock port",
 476         [19]    = "block unit",
 477         [20]    = "unblock unit",
 478         [21]    = "unit recovery failed",
 479         [22]    = "port recovery failed",
 480         [23]    = "adapter recovery failed",
 481         [24]    = "qdio queues down",
 482         [25]    = "p2p failed",
 483         [26]    = "nameserver lookup failed",
 484         [27]    = "nameserver port failed",
 485         [28]    = "link up",
 486         [29]    = "link down",
 487         [30]    = "link up status read",
 488         [31]    = "open port failed",
 489         [32]    = "open port failed",
 490         [33]    = "close port",
 491         [34]    = "open unit failed",
 492         [35]    = "exclusive open unit failed",
 493         [36]    = "shared open unit failed",
 494         [37]    = "link down",
 495         [38]    = "link down status read no link",
 496         [39]    = "link down status read fdisc login",
 497         [40]    = "link down status read firmware update",
 498         [41]    = "link down status read unknown reason",
 499         [42]    = "link down ecd incomplete",
 500         [43]    = "link down epd incomplete",
 501         [44]    = "sysfs adapter recovery",
 502         [45]    = "sysfs port recovery",
 503         [46]    = "sysfs unit recovery",
 504         [47]    = "port boxed abort",
 505         [48]    = "unit boxed abort",
 506         [49]    = "port boxed ct",
 507         [50]    = "port boxed close physical",
 508         [51]    = "port boxed open unit",
 509         [52]    = "port boxed close unit",
 510         [53]    = "port boxed fcp",
 511         [54]    = "unit boxed fcp",
 512         [55]    = "port access denied ct",
 513         [56]    = "port access denied els",
 514         [57]    = "port access denied open port",
 515         [58]    = "port access denied close physical",
 516         [59]    = "unit access denied open unit",
 517         [60]    = "shared unit access denied open unit",
 518         [61]    = "unit access denied fcp",
 519         [62]    = "request timeout",
 520         [63]    = "adisc link test reject or timeout",
 521         [64]    = "adisc link test d_id changed",
 522         [65]    = "adisc link test failed",
 523         [66]    = "recovery out of memory",
 524         [67]    = "adapter recovery repeated after state change",
 525         [68]    = "port recovery repeated after state change",
 526         [69]    = "unit recovery repeated after state change",
 527         [70]    = "port recovery follow-up after successful adapter recovery",
 528         [71]    = "adapter recovery escalation after failed adapter recovery",
 529         [72]    = "port recovery follow-up after successful physical port "
 530                   "recovery",
 531         [73]    = "adapter recovery escalation after failed physical port "
 532                   "recovery",
 533         [74]    = "unit recovery follow-up after successful port recovery",
 534         [75]    = "physical port recovery escalation after failed port "
 535                   "recovery",
 536         [76]    = "port recovery escalation after failed unit recovery",
 537         [77]    = "recovery opening nameserver port",
 538         [78]    = "duplicate request id",
 539         [79]    = "link down",
 540         [80]    = "exclusive read-only unit access unsupported",
 541         [81]    = "shared read-write unit access unsupported",
 542         [82]    = "incoming rscn",
 543         [83]    = "incoming plogi",
 544         [84]    = "incoming logo",
 545         [85]    = "online",
 546         [86]    = "offline",
 547         [87]    = "ccw device gone",
 548         [88]    = "ccw device no path",
 549         [89]    = "ccw device operational",
 550         [90]    = "ccw device shutdown",
 551         [91]    = "sysfs port addition",
 552         [92]    = "sysfs port removal",
 553         [93]    = "sysfs adapter recovery",
 554         [94]    = "sysfs unit addition",
 555         [95]    = "sysfs unit removal",
 556         [96]    = "sysfs port recovery",
 557         [97]    = "sysfs unit recovery",
 558         [98]    = "sequence number mismatch",
 559         [99]    = "link up",
 560         [100]   = "error state",
 561         [101]   = "status read physical port closed",
 562         [102]   = "link up status read",
 563         [103]   = "too many failed status read buffers",
 564         [104]   = "port handle not valid abort",
 565         [105]   = "lun handle not valid abort",
 566         [106]   = "port handle not valid ct",
 567         [107]   = "port handle not valid close port",
 568         [108]   = "port handle not valid close physical port",
 569         [109]   = "port handle not valid open unit",
 570         [110]   = "port handle not valid close unit",
 571         [111]   = "lun handle not valid close unit",
 572         [112]   = "port handle not valid fcp",
 573         [113]   = "lun handle not valid fcp",
 574         [114]   = "handle mismatch fcp",
 575         [115]   = "lun not valid fcp",
 576         [116]   = "qdio send failed",
 577         [117]   = "version mismatch",
 578         [118]   = "incompatible qtcb type",
 579         [119]   = "unknown protocol status",
 580         [120]   = "unknown fsf command",
 581         [121]   = "no recommendation for status qualifier",
 582         [122]   = "status read physical port closed in error",
 583         [123]   = "fc service class not supported ct",
 584         [124]   = "fc service class not supported els",
 585         [125]   = "need newer zfcp",
 586         [126]   = "need newer microcode",
 587         [127]   = "arbitrated loop not supported",
 588         [128]   = "unknown topology",
 589         [129]   = "qtcb size mismatch",
 590         [130]   = "unknown fsf status ecd",
 591         [131]   = "fcp request too big",
 592         [132]   = "fc service class not supported fcp",
 593         [133]   = "data direction not valid fcp",
 594         [134]   = "command length not valid fcp",
 595         [135]   = "status read act update",
 596         [136]   = "status read cfdc update",
 597         [137]   = "hbaapi port open",
 598         [138]   = "hbaapi unit open",
 599         [139]   = "hbaapi unit shutdown",
 600         [140]   = "qdio error",
 601         [141]   = "scsi host reset",
 602         [142]   = "dismissing fsf request for recovery action",
 603         [143]   = "recovery action timed out",
 604         [144]   = "recovery action gone",
 605         [145]   = "recovery action being processed",
 606         [146]   = "recovery action ready for next step",
 607 };
 608
 609 static int zfcp_rec_dbf_view_format(debug_info_t *id, struct debug_view *view,
 610                                     char *buf, const char *_rec)
 611 {
 612         struct zfcp_rec_dbf_record *r = (struct zfcp_rec_dbf_record *)_rec;
 613         char *p = buf;
 614
 615         zfcp_dbf_outs(&p, "tag", zfcp_rec_dbf_tags[r->id]);
 616         zfcp_dbf_outs(&p, "hint", zfcp_rec_dbf_ids[r->id2]);
 617         zfcp_dbf_out(&p, "id", "%d", r->id2);
 618         switch (r->id) {
 619         case ZFCP_REC_DBF_ID_THREAD:
 620                 zfcp_dbf_out(&p, "sema", "%d", r->u.thread.sema);
 621                 zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
 622                 zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
 623                 zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
 624                 break;
 625         case ZFCP_REC_DBF_ID_TARGET:
 626                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
 627                 zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
 628                 zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
 629                 zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
 630                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
 631                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
 632                 break;
 633         case ZFCP_REC_DBF_ID_TRIGGER:
 634                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
 635                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
 636                 zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
 637                 zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
 638                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
 639                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
 640                 zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
 641                 zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
 642                 zfcp_dbf_out(&p, "unit_status", "0x%08x", r->u.trigger.us);
 643                 break;
 644         case ZFCP_REC_DBF_ID_ACTION:
 645                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
 646                 zfcp_dbf_out(&p, "fsf_req", "0x%016Lx", r->u.action.fsf_req);
 647                 zfcp_dbf_out(&p, "status", "0x%08Lx", r->u.action.status);
 648                 zfcp_dbf_out(&p, "step", "0x%08Lx", r->u.action.step);
 649                 break;
 650         }
 651         p += sprintf(p, "\n");
 652         return p - buf;
 653 }
 654
 655 static struct debug_view zfcp_rec_dbf_view = {
 656         "structured",
 657         NULL,
 658         &zfcp_dbf_view_header,
 659         &zfcp_rec_dbf_view_format,
 660         NULL,
 661         NULL
 662 };
 663
 664 /**
 665  * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
 666  * @id2: identifier for event
 667  * @adapter: adapter
 668  * @lock: non-zero value indicates that erp_lock has not yet been acquired
 669  */
 670 void zfcp_rec_dbf_event_thread(u8 id2, struct zfcp_adapter *adapter, int lock)
 671 {
 672         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 673         unsigned long flags = 0;
 674         struct list_head *entry;
 675         unsigned ready = 0, running = 0, total;
 676
 677         if (lock)
 678                 read_lock_irqsave(&adapter->erp_lock, flags);
 679         list_for_each(entry, &adapter->erp_ready_head)
 680                 ready++;
 681         list_for_each(entry, &adapter->erp_running_head)
 682                 running++;
 683         total = adapter->erp_total_count;
 684         if (lock)
 685                 read_unlock_irqrestore(&adapter->erp_lock, flags);
 686
 687         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 688         memset(r, 0, sizeof(*r));
 689         r->id = ZFCP_REC_DBF_ID_THREAD;
 690         r->id2 = id2;
 691         r->u.thread.sema = atomic_read(&adapter->erp_ready_sem.count);
 692         r->u.thread.total = total;
 693         r->u.thread.ready = ready;
 694         r->u.thread.running = running;
 695         debug_event(adapter->rec_dbf, 5, r, sizeof(*r));
 696         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 697 }
 698
 699 static void zfcp_rec_dbf_event_target(u8 id2, u64 ref,
 700                                       struct zfcp_adapter *adapter,
 701                                       atomic_t *status, atomic_t *erp_count,
 702                                       u64 wwpn, u32 d_id, u64 fcp_lun)
 703 {
 704         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 705         unsigned long flags;
 706
 707         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 708         memset(r, 0, sizeof(*r));
 709         r->id = ZFCP_REC_DBF_ID_TARGET;
 710         r->id2 = id2;
 711         r->u.target.ref = ref;
 712         r->u.target.status = atomic_read(status);
 713         r->u.target.wwpn = wwpn;
 714         r->u.target.d_id = d_id;
 715         r->u.target.fcp_lun = fcp_lun;
 716         r->u.target.erp_count = atomic_read(erp_count);
 717         debug_event(adapter->rec_dbf, 3, r, sizeof(*r));
 718         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 719 }
 720
 721 /**
 722  * zfcp_rec_dbf_event_adapter - trace event for adapter state change
 723  * @id: identifier for trigger of state change
 724  * @ref: additional reference (e.g. request)
 725  * @adapter: adapter
 726  */
 727 void zfcp_rec_dbf_event_adapter(u8 id, u64 ref, struct zfcp_adapter *adapter)
 728 {
 729         zfcp_rec_dbf_event_target(id, ref, adapter, &adapter->status,
 730                                   &adapter->erp_counter, 0, 0, 0);
 731 }
 732
 733 /**
 734  * zfcp_rec_dbf_event_port - trace event for port state change
 735  * @id: identifier for trigger of state change
 736  * @ref: additional reference (e.g. request)
 737  * @port: port
 738  */
 739 void zfcp_rec_dbf_event_port(u8 id, u64 ref, struct zfcp_port *port)
 740 {
 741         struct zfcp_adapter *adapter = port->adapter;
 742
 743         zfcp_rec_dbf_event_target(id, ref, adapter, &port->status,
 744                                   &port->erp_counter, port->wwpn, port->d_id,
 745                                   0);
 746 }
 747
 748 /**
 749  * zfcp_rec_dbf_event_unit - trace event for unit state change
 750  * @id: identifier for trigger of state change
 751  * @ref: additional reference (e.g. request)
 752  * @unit: unit
 753  */
 754 void zfcp_rec_dbf_event_unit(u8 id, u64 ref, struct zfcp_unit *unit)
 755 {
 756         struct zfcp_port *port = unit->port;
 757         struct zfcp_adapter *adapter = port->adapter;
 758
 759         zfcp_rec_dbf_event_target(id, ref, adapter, &unit->status,
 760                                   &unit->erp_counter, port->wwpn, port->d_id,
 761                                   unit->fcp_lun);
 762 }
 763
 764 /**
 765  * zfcp_rec_dbf_event_trigger - trace event for triggered error recovery
 766  * @id2: identifier for error recovery trigger
 767  * @ref: additional reference (e.g. request)
 768  * @want: originally requested error recovery action
 769  * @need: error recovery action actually initiated
 770  * @action: address of error recovery action struct
 771  * @adapter: adapter
 772  * @port: port
 773  * @unit: unit
 774  */
 775 void zfcp_rec_dbf_event_trigger(u8 id2, u64 ref, u8 want, u8 need, u64 action,
 776                                 struct zfcp_adapter *adapter,
 777                                 struct zfcp_port *port, struct zfcp_unit *unit)
 778 {
 779         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 780         unsigned long flags;
 781
 782         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 783         memset(r, 0, sizeof(*r));
 784         r->id = ZFCP_REC_DBF_ID_TRIGGER;
 785         r->id2 = id2;
 786         r->u.trigger.ref = ref;
 787         r->u.trigger.want = want;
 788         r->u.trigger.need = need;
 789         r->u.trigger.action = action;
 790         r->u.trigger.as = atomic_read(&adapter->status);
 791         if (port) {
 792                 r->u.trigger.ps = atomic_read(&port->status);
 793                 r->u.trigger.wwpn = port->wwpn;
 794         }
 795         if (unit) {
 796                 r->u.trigger.us = atomic_read(&unit->status);
 797                 r->u.trigger.fcp_lun = unit->fcp_lun;
 798         }
 799         debug_event(adapter->rec_dbf, action ? 1 : 4, r, sizeof(*r));
 800         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 801 }
 802
 803 /**
 804  * zfcp_rec_dbf_event_action - trace event showing progress of recovery action
 805  * @id2: identifier
 806  * @erp_action: error recovery action struct pointer
 807  */
 808 void zfcp_rec_dbf_event_action(u8 id2, struct zfcp_erp_action *erp_action)
 809 {
 810         struct zfcp_adapter *adapter = erp_action->adapter;
 811         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 812         unsigned long flags;
 813
 814         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 815         memset(r, 0, sizeof(*r));
 816         r->id = ZFCP_REC_DBF_ID_ACTION;
 817         r->id2 = id2;
 818         r->u.action.action = (u64)erp_action;
 819         r->u.action.status = erp_action->status;
 820         r->u.action.step = erp_action->step;
 821         r->u.action.fsf_req = (u64)erp_action->fsf_req;
 822         debug_event(adapter->rec_dbf, 4, r, sizeof(*r));
 823         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 824 }
 825
 826 static void
 827 _zfcp_san_dbf_event_common_ct(const char *tag, struct zfcp_fsf_req *fsf_req,
 828                               u32 s_id, u32 d_id, void *buffer, int buflen)
 829 {
 830         struct zfcp_send_ct *send_ct = (struct zfcp_send_ct *)fsf_req->data;
 831         struct zfcp_port *port = send_ct->port;
 832         struct zfcp_adapter *adapter = port->adapter;
 833         struct ct_hdr *header = (struct ct_hdr *)buffer;
 834         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
 835         struct zfcp_san_dbf_record_ct *ct = &rec->type.ct;
 836         unsigned long flags;
 837
 838         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 839         memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
 840         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 841         rec->fsf_reqid = (unsigned long)fsf_req;
 842         rec->fsf_seqno = fsf_req->seq_no;
 843         rec->s_id = s_id;
 844         rec->d_id = d_id;
 845         if (strncmp(tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 846                 ct->type.request.cmd_req_code = header->cmd_rsp_code;
 847                 ct->type.request.revision = header->revision;
 848                 ct->type.request.gs_type = header->gs_type;
 849                 ct->type.request.gs_subtype = header->gs_subtype;
 850                 ct->type.request.options = header->options;
 851                 ct->type.request.max_res_size = header->max_res_size;
 852         } else if (strncmp(tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 853                 ct->type.response.cmd_rsp_code = header->cmd_rsp_code;
 854                 ct->type.response.revision = header->revision;
 855                 ct->type.response.reason_code = header->reason_code;
 856                 ct->type.response.reason_code_expl = header->reason_code_expl;
 857                 ct->type.response.vendor_unique = header->vendor_unique;
 858         }
 859         ct->payload_size =
 860             min(buflen - (int)sizeof(struct ct_hdr), ZFCP_DBF_CT_PAYLOAD);
 861         memcpy(ct->payload, buffer + sizeof(struct ct_hdr), ct->payload_size);
 862         debug_event(adapter->san_dbf, 3,
 863                     rec, sizeof(struct zfcp_san_dbf_record));
 864         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 865 }
 866
 867 void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
 868 {
 869         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 870         struct zfcp_port *port = ct->port;
 871         struct zfcp_adapter *adapter = port->adapter;
 872
 873         _zfcp_san_dbf_event_common_ct("octc", fsf_req,
 874                                       fc_host_port_id(adapter->scsi_host),
 875                                       port->d_id, zfcp_sg_to_address(ct->req),
 876                                       ct->req->length);
 877 }
 878
 879 void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
 880 {
 881         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 882         struct zfcp_port *port = ct->port;
 883         struct zfcp_adapter *adapter = port->adapter;
 884
 885         _zfcp_san_dbf_event_common_ct("rctc", fsf_req, port->d_id,
 886                                       fc_host_port_id(adapter->scsi_host),
 887                                       zfcp_sg_to_address(ct->resp),
 888                                       ct->resp->length);
 889 }
 890
 891 static void
 892 _zfcp_san_dbf_event_common_els(const char *tag, int level,
 893                                struct zfcp_fsf_req *fsf_req, u32 s_id,
 894                                u32 d_id, u8 ls_code, void *buffer, int buflen)
 895 {
 896         struct zfcp_adapter *adapter = fsf_req->adapter;
 897         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
 898         unsigned long flags;
 899
 900         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 901         memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
 902         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 903         rec->fsf_reqid = (unsigned long)fsf_req;
 904         rec->fsf_seqno = fsf_req->seq_no;
 905         rec->s_id = s_id;
 906         rec->d_id = d_id;
 907         rec->type.els.ls_code = ls_code;
 908         debug_event(adapter->san_dbf, level, rec, sizeof(*rec));
 909         zfcp_dbf_hexdump(adapter->san_dbf, rec, sizeof(*rec), level,
 910                          buffer, min(buflen, ZFCP_DBF_ELS_MAX_PAYLOAD));
 911         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 912 }
 913
 914 void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
 915 {
 916         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 917
 918         _zfcp_san_dbf_event_common_els("oels", 2, fsf_req,
 919                                        fc_host_port_id(els->adapter->scsi_host),
 920                                        els->d_id,
 921                                        *(u8 *) zfcp_sg_to_address(els->req),
 922                                        zfcp_sg_to_address(els->req),
 923                                        els->req->length);
 924 }
 925
 926 void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
 927 {
 928         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 929
 930         _zfcp_san_dbf_event_common_els("rels", 2, fsf_req, els->d_id,
 931                                        fc_host_port_id(els->adapter->scsi_host),
 932                                        *(u8 *) zfcp_sg_to_address(els->req),
 933                                        zfcp_sg_to_address(els->resp),
 934                                        els->resp->length);
 935 }
 936
 937 void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
 938 {
 939         struct zfcp_adapter *adapter = fsf_req->adapter;
 940         struct fsf_status_read_buffer *status_buffer =
 941             (struct fsf_status_read_buffer *)fsf_req->data;
 942         int length = (int)status_buffer->length -
 943             (int)((void *)&status_buffer->payload - (void *)status_buffer);
 944
 945         _zfcp_san_dbf_event_common_els("iels", 1, fsf_req, status_buffer->d_id,
 946                                        fc_host_port_id(adapter->scsi_host),
 947                                        *(u8 *) status_buffer->payload,
 948                                        (void *)status_buffer->payload, length);
 949 }
 950
 951 static int
 952 zfcp_san_dbf_view_format(debug_info_t * id, struct debug_view *view,
 953                          char *out_buf, const char *in_buf)
 954 {
 955         struct zfcp_san_dbf_record *r = (struct zfcp_san_dbf_record *)in_buf;
 956         char *buffer = NULL;
 957         int buflen = 0, total = 0;
 958         char *p = out_buf;
 959
 960         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 961                 return 0;
 962
 963         zfcp_dbf_tag(&p, "tag", r->tag);
 964         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 965         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 966         zfcp_dbf_out(&p, "s_id", "0x%06x", r->s_id);
 967         zfcp_dbf_out(&p, "d_id", "0x%06x", r->d_id);
 968
 969         if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 970                 /* FIXME: struct zfcp_dbf_ct_req *ct = ...; */
 971                 zfcp_dbf_out(&p, "cmd_req_code", "0x%04x",
 972                              r->type.ct.type.request.cmd_req_code);
 973                 zfcp_dbf_out(&p, "revision", "0x%02x",
 974                              r->type.ct.type.request.revision);
 975                 zfcp_dbf_out(&p, "gs_type", "0x%02x",
 976                              r->type.ct.type.request.gs_type);
 977                 zfcp_dbf_out(&p, "gs_subtype", "0x%02x",
 978                              r->type.ct.type.request.gs_subtype);
 979                 zfcp_dbf_out(&p, "options", "0x%02x",
 980                              r->type.ct.type.request.options);
 981                 zfcp_dbf_out(&p, "max_res_size", "0x%04x",
 982                              r->type.ct.type.request.max_res_size);
 983                 total = r->type.ct.payload_size;
 984                 buffer = r->type.ct.payload;
 985                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
 986         } else if (strncmp(r->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 987                 zfcp_dbf_out(&p, "cmd_rsp_code", "0x%04x",
 988                              r->type.ct.type.response.cmd_rsp_code);
 989                 zfcp_dbf_out(&p, "revision", "0x%02x",
 990                              r->type.ct.type.response.revision);
 991                 zfcp_dbf_out(&p, "reason_code", "0x%02x",
 992                              r->type.ct.type.response.reason_code);
 993                 zfcp_dbf_out(&p, "reason_code_expl", "0x%02x",
 994                              r->type.ct.type.response.reason_code_expl);
 995                 zfcp_dbf_out(&p, "vendor_unique", "0x%02x",
 996                              r->type.ct.type.response.vendor_unique);
 997                 total = r->type.ct.payload_size;
 998                 buffer = r->type.ct.payload;
 999                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
1000         } else if (strncmp(r->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
1001                    strncmp(r->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
1002                    strncmp(r->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
1003                 zfcp_dbf_out(&p, "ls_code", "0x%02x", r->type.els.ls_code);
1004                 total = r->type.els.payload_size;
1005                 buffer = r->type.els.payload;
1006                 buflen = min(total, ZFCP_DBF_ELS_PAYLOAD);
1007         }
1008
1009         zfcp_dbf_outd(&p, "payload", buffer, buflen, 0, total);
1010         if (buflen == total)
1011                 p += sprintf(p, "\n");
1012
1013         return p - out_buf;
1014 }
1015
1016 static struct debug_view zfcp_san_dbf_view = {
1017         "structured",
1018         NULL,
1019         &zfcp_dbf_view_header,
1020         &zfcp_san_dbf_view_format,
1021         NULL,
1022         NULL
1023 };
1024
1025 static void
1026 _zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level,
1027                             struct zfcp_adapter *adapter,
1028                             struct scsi_cmnd *scsi_cmnd,
1029                             struct zfcp_fsf_req *fsf_req,
1030                             unsigned long old_req_id)
1031 {
1032         struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
1033         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
1034         unsigned long flags;
1035         struct fcp_rsp_iu *fcp_rsp;
1036         char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
1037         int offset = 0, buflen = 0;
1038
1039         spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
1040         do {
1041                 memset(rec, 0, sizeof(struct zfcp_scsi_dbf_record));
1042                 if (offset == 0) {
1043                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
1044                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
1045                         if (scsi_cmnd != NULL) {
1046                                 if (scsi_cmnd->device) {
1047                                         rec->scsi_id = scsi_cmnd->device->id;
1048                                         rec->scsi_lun = scsi_cmnd->device->lun;
1049                                 }
1050                                 rec->scsi_result = scsi_cmnd->result;
1051                                 rec->scsi_cmnd = (unsigned long)scsi_cmnd;
1052                                 rec->scsi_serial = scsi_cmnd->serial_number;
1053                                 memcpy(rec->scsi_opcode, &scsi_cmnd->cmnd,
1054                                         min((int)scsi_cmnd->cmd_len,
1055                                                 ZFCP_DBF_SCSI_OPCODE));
1056                                 rec->scsi_retries = scsi_cmnd->retries;
1057                                 rec->scsi_allowed = scsi_cmnd->allowed;
1058                         }
1059                         if (fsf_req != NULL) {
1060                                 fcp_rsp = (struct fcp_rsp_iu *)
1061                                     &(fsf_req->qtcb->bottom.io.fcp_rsp);
1062                                 fcp_rsp_info =
1063                                     zfcp_get_fcp_rsp_info_ptr(fcp_rsp);
1064                                 fcp_sns_info =
1065                                     zfcp_get_fcp_sns_info_ptr(fcp_rsp);
1066
1067                                 rec->type.fcp.rsp_validity =
1068                                     fcp_rsp->validity.value;
1069                                 rec->type.fcp.rsp_scsi_status =
1070                                     fcp_rsp->scsi_status;
1071                                 rec->type.fcp.rsp_resid = fcp_rsp->fcp_resid;
1072                                 if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
1073                                         rec->type.fcp.rsp_code =
1074                                             *(fcp_rsp_info + 3);
1075                                 if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
1076                                         buflen = min((int)fcp_rsp->fcp_sns_len,
1077                                                      ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
1078                                         rec->type.fcp.sns_info_len = buflen;
1079                                         memcpy(rec->type.fcp.sns_info,
1080                                                fcp_sns_info,
1081                                                min(buflen,
1082                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
1083                                         offset += min(buflen,
1084                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
1085                                 }
1086
1087                                 rec->fsf_reqid = (unsigned long)fsf_req;
1088                                 rec->fsf_seqno = fsf_req->seq_no;
1089                                 rec->fsf_issued = fsf_req->issued;
1090                         }
1091                         rec->type.old_fsf_reqid = old_req_id;
1092                 } else {
1093                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
1094                         dump->total_size = buflen;
1095                         dump->offset = offset;
1096                         dump->size = min(buflen - offset,
1097                                          (int)sizeof(struct
1098                                                      zfcp_scsi_dbf_record) -
1099                                          (int)sizeof(struct zfcp_dbf_dump));
1100                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
1101                         offset += dump->size;
1102                 }
1103                 debug_event(adapter->scsi_dbf, level,
1104                             rec, sizeof(struct zfcp_scsi_dbf_record));
1105         } while (offset < buflen);
1106         spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
1107 }
1108
1109 void
1110 zfcp_scsi_dbf_event_result(const char *tag, int level,
1111                            struct zfcp_adapter *adapter,
1112                            struct scsi_cmnd *scsi_cmnd,
1113                            struct zfcp_fsf_req *fsf_req)
1114 {
1115         _zfcp_scsi_dbf_event_common("rslt", tag, level,
1116                         adapter, scsi_cmnd, fsf_req, 0);
1117 }
1118
1119 void
1120 zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
1121                           struct scsi_cmnd *scsi_cmnd,
1122                           struct zfcp_fsf_req *new_fsf_req,
1123                           unsigned long old_req_id)
1124 {
1125         _zfcp_scsi_dbf_event_common("abrt", tag, 1,
1126                         adapter, scsi_cmnd, new_fsf_req, old_req_id);
1127 }
1128
1129 void
1130 zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag, struct zfcp_unit *unit,
1131                              struct scsi_cmnd *scsi_cmnd)
1132 {
1133         struct zfcp_adapter *adapter = unit->port->adapter;
1134
1135         _zfcp_scsi_dbf_event_common(flag == FCP_TARGET_RESET ? "trst" : "lrst",
1136                         tag, 1, adapter, scsi_cmnd, NULL, 0);
1137 }
1138
1139 static int
1140 zfcp_scsi_dbf_view_format(debug_info_t * id, struct debug_view *view,
1141                           char *out_buf, const char *in_buf)
1142 {
1143         struct zfcp_scsi_dbf_record *r = (struct zfcp_scsi_dbf_record *)in_buf;
1144         struct timespec t;
1145         char *p = out_buf;
1146
1147         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
1148                 return 0;
1149
1150         zfcp_dbf_tag(&p, "tag", r->tag);
1151         zfcp_dbf_tag(&p, "tag2", r->tag2);
1152         zfcp_dbf_out(&p, "scsi_id", "0x%08x", r->scsi_id);
1153         zfcp_dbf_out(&p, "scsi_lun", "0x%08x", r->scsi_lun);
1154         zfcp_dbf_out(&p, "scsi_result", "0x%08x", r->scsi_result);
1155         zfcp_dbf_out(&p, "scsi_cmnd", "0x%0Lx", r->scsi_cmnd);
1156         zfcp_dbf_out(&p, "scsi_serial", "0x%016Lx", r->scsi_serial);
1157         zfcp_dbf_outd(&p, "scsi_opcode", r->scsi_opcode, ZFCP_DBF_SCSI_OPCODE,
1158                       0, ZFCP_DBF_SCSI_OPCODE);
1159         zfcp_dbf_out(&p, "scsi_retries", "0x%02x", r->scsi_retries);
1160         zfcp_dbf_out(&p, "scsi_allowed", "0x%02x", r->scsi_allowed);
1161         if (strncmp(r->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0)
1162                 zfcp_dbf_out(&p, "old_fsf_reqid", "0x%0Lx",
1163                              r->type.old_fsf_reqid);
1164         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
1165         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
1166         zfcp_dbf_timestamp(r->fsf_issued, &t);
1167         zfcp_dbf_out(&p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
1168
1169         if (strncmp(r->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
1170                 zfcp_dbf_out(&p, "fcp_rsp_validity", "0x%02x",
1171                              r->type.fcp.rsp_validity);
1172                 zfcp_dbf_out(&p, "fcp_rsp_scsi_status",
1173                              "0x%02x", r->type.fcp.rsp_scsi_status);
1174                 zfcp_dbf_out(&p, "fcp_rsp_resid", "0x%08x",
1175                              r->type.fcp.rsp_resid);
1176                 zfcp_dbf_out(&p, "fcp_rsp_code", "0x%08x",
1177                              r->type.fcp.rsp_code);
1178                 zfcp_dbf_out(&p, "fcp_sns_info_len", "0x%08x",
1179                              r->type.fcp.sns_info_len);
1180                 zfcp_dbf_outd(&p, "fcp_sns_info", r->type.fcp.sns_info,
1181                               min((int)r->type.fcp.sns_info_len,
1182                               ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
1183                               r->type.fcp.sns_info_len);
1184         }
1185         p += sprintf(p, "\n");
1186         return p - out_buf;
1187 }
1188
1189 static struct debug_view zfcp_scsi_dbf_view = {
1190         "structured",
1191         NULL,
1192         &zfcp_dbf_view_header,
1193         &zfcp_scsi_dbf_view_format,
1194         NULL,
1195         NULL
1196 };
1197
1198 /**
1199  * zfcp_adapter_debug_register - registers debug feature for an adapter
1200  * @adapter: pointer to adapter for which debug features should be registered
1201  * return: -ENOMEM on error, 0 otherwise
1202  */
1203 int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
1204 {
1205         char dbf_name[DEBUG_MAX_NAME_LEN];
1206
1207         /* debug feature area which records recovery activity */
1208         sprintf(dbf_name, "zfcp_%s_rec", zfcp_get_busid_by_adapter(adapter));
1209         adapter->rec_dbf = debug_register(dbf_name, dbfsize, 1,
1210                                           sizeof(struct zfcp_rec_dbf_record));
1211         if (!adapter->rec_dbf)
1212                 goto failed;
1213         debug_register_view(adapter->rec_dbf, &debug_hex_ascii_view);
1214         debug_register_view(adapter->rec_dbf, &zfcp_rec_dbf_view);
1215         debug_set_level(adapter->rec_dbf, 3);
1216
1217         /* debug feature area which records HBA (FSF and QDIO) conditions */
1218         sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter));
1219         adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
1220                                           sizeof(struct zfcp_hba_dbf_record));
1221         if (!adapter->hba_dbf)
1222                 goto failed;
1223         debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
1224         debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
1225         debug_set_level(adapter->hba_dbf, 3);
1226
1227         /* debug feature area which records SAN command failures and recovery */
1228         sprintf(dbf_name, "zfcp_%s_san", zfcp_get_busid_by_adapter(adapter));
1229         adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
1230                                           sizeof(struct zfcp_san_dbf_record));
1231         if (!adapter->san_dbf)
1232                 goto failed;
1233         debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
1234         debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
1235         debug_set_level(adapter->san_dbf, 6);
1236
1237         /* debug feature area which records SCSI command failures and recovery */
1238         sprintf(dbf_name, "zfcp_%s_scsi", zfcp_get_busid_by_adapter(adapter));
1239         adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
1240                                            sizeof(struct zfcp_scsi_dbf_record));
1241         if (!adapter->scsi_dbf)
1242                 goto failed;
1243         debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
1244         debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
1245         debug_set_level(adapter->scsi_dbf, 3);
1246
1247         return 0;
1248
1249  failed:
1250         zfcp_adapter_debug_unregister(adapter);
1251
1252         return -ENOMEM;
1253 }
1254
1255 /**
1256  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
1257  * @adapter: pointer to adapter for which debug features should be unregistered
1258  */
1259 void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
1260 {
1261         debug_unregister(adapter->scsi_dbf);
1262         debug_unregister(adapter->san_dbf);
1263         debug_unregister(adapter->hba_dbf);
1264         debug_unregister(adapter->rec_dbf);
1265         adapter->scsi_dbf = NULL;
1266         adapter->san_dbf = NULL;
1267         adapter->hba_dbf = NULL;
1268         adapter->rec_dbf = NULL;
1269 }
1270
1271 #undef ZFCP_LOG_AREA